Vlad Yasevich | 60c778b | 2008-01-11 09:57:09 -0500 | [diff] [blame] | 1 | /* SCTP kernel implementation |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | * (C) Copyright IBM Corp. 2001, 2004 |
| 3 | * Copyright (c) 1999-2000 Cisco, Inc. |
| 4 | * Copyright (c) 1999-2001 Motorola, Inc. |
| 5 | * Copyright (c) 2001-2003 Intel Corp. |
| 6 | * Copyright (c) 2001-2002 Nokia, Inc. |
| 7 | * Copyright (c) 2001 La Monte H.P. Yarroll |
| 8 | * |
Vlad Yasevich | 60c778b | 2008-01-11 09:57:09 -0500 | [diff] [blame] | 9 | * This file is part of the SCTP kernel implementation |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 10 | * |
| 11 | * These functions interface with the sockets layer to implement the |
| 12 | * SCTP Extensions for the Sockets API. |
| 13 | * |
| 14 | * Note that the descriptions from the specification are USER level |
| 15 | * functions--this file is the functions which populate the struct proto |
| 16 | * for SCTP which is the BOTTOM of the sockets interface. |
| 17 | * |
Vlad Yasevich | 60c778b | 2008-01-11 09:57:09 -0500 | [diff] [blame] | 18 | * This SCTP implementation is free software; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | * you can redistribute it and/or modify it under the terms of |
| 20 | * the GNU General Public License as published by |
| 21 | * the Free Software Foundation; either version 2, or (at your option) |
| 22 | * any later version. |
| 23 | * |
Vlad Yasevich | 60c778b | 2008-01-11 09:57:09 -0500 | [diff] [blame] | 24 | * This SCTP implementation is distributed in the hope that it |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | * will be useful, but WITHOUT ANY WARRANTY; without even the implied |
| 26 | * ************************ |
| 27 | * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
| 28 | * See the GNU General Public License for more details. |
| 29 | * |
| 30 | * You should have received a copy of the GNU General Public License |
| 31 | * along with GNU CC; see the file COPYING. If not, write to |
| 32 | * the Free Software Foundation, 59 Temple Place - Suite 330, |
| 33 | * Boston, MA 02111-1307, USA. |
| 34 | * |
| 35 | * Please send any bug reports or fixes you make to the |
| 36 | * email address(es): |
| 37 | * lksctp developers <lksctp-developers@lists.sourceforge.net> |
| 38 | * |
| 39 | * Or submit a bug report through the following website: |
| 40 | * http://www.sf.net/projects/lksctp |
| 41 | * |
| 42 | * Written or modified by: |
| 43 | * La Monte H.P. Yarroll <piggy@acm.org> |
| 44 | * Narasimha Budihal <narsi@refcode.org> |
| 45 | * Karl Knutson <karl@athena.chicago.il.us> |
| 46 | * Jon Grimm <jgrimm@us.ibm.com> |
| 47 | * Xingang Guo <xingang.guo@intel.com> |
| 48 | * Daisy Chang <daisyc@us.ibm.com> |
| 49 | * Sridhar Samudrala <samudrala@us.ibm.com> |
| 50 | * Inaky Perez-Gonzalez <inaky.gonzalez@intel.com> |
| 51 | * Ardelle Fan <ardelle.fan@intel.com> |
| 52 | * Ryan Layer <rmlayer@us.ibm.com> |
| 53 | * Anup Pemmaiah <pemmaiah@cc.usu.edu> |
| 54 | * Kevin Gao <kevin.gao@intel.com> |
| 55 | * |
| 56 | * Any bugs reported given to us we will try to fix... any fixes shared will |
| 57 | * be incorporated into the next SCTP release. |
| 58 | */ |
| 59 | |
Joe Perches | 145ce50 | 2010-08-24 13:21:08 +0000 | [diff] [blame] | 60 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 61 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | #include <linux/types.h> |
| 63 | #include <linux/kernel.h> |
| 64 | #include <linux/wait.h> |
| 65 | #include <linux/time.h> |
| 66 | #include <linux/ip.h> |
Randy Dunlap | 4fc268d | 2006-01-11 12:17:47 -0800 | [diff] [blame] | 67 | #include <linux/capability.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | #include <linux/fcntl.h> |
| 69 | #include <linux/poll.h> |
| 70 | #include <linux/init.h> |
| 71 | #include <linux/crypto.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 72 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | |
| 74 | #include <net/ip.h> |
| 75 | #include <net/icmp.h> |
| 76 | #include <net/route.h> |
| 77 | #include <net/ipv6.h> |
| 78 | #include <net/inet_common.h> |
| 79 | |
| 80 | #include <linux/socket.h> /* for sa_family_t */ |
Paul Gortmaker | bc3b2d7 | 2011-07-15 11:47:34 -0400 | [diff] [blame] | 81 | #include <linux/export.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | #include <net/sock.h> |
| 83 | #include <net/sctp/sctp.h> |
| 84 | #include <net/sctp/sm.h> |
| 85 | |
| 86 | /* WARNING: Please do not remove the SCTP_STATIC attribute to |
| 87 | * any of the functions below as they are used to export functions |
| 88 | * used by a project regression testsuite. |
| 89 | */ |
| 90 | |
| 91 | /* Forward declarations for internal helper functions. */ |
| 92 | static int sctp_writeable(struct sock *sk); |
| 93 | static void sctp_wfree(struct sk_buff *skb); |
| 94 | static int sctp_wait_for_sndbuf(struct sctp_association *, long *timeo_p, |
| 95 | size_t msg_len); |
| 96 | static int sctp_wait_for_packet(struct sock * sk, int *err, long *timeo_p); |
| 97 | static int sctp_wait_for_connect(struct sctp_association *, long *timeo_p); |
| 98 | static int sctp_wait_for_accept(struct sock *sk, long timeo); |
| 99 | static void sctp_wait_for_close(struct sock *sk, long timeo); |
| 100 | static struct sctp_af *sctp_sockaddr_af(struct sctp_sock *opt, |
| 101 | union sctp_addr *addr, int len); |
| 102 | static int sctp_bindx_add(struct sock *, struct sockaddr *, int); |
| 103 | static int sctp_bindx_rem(struct sock *, struct sockaddr *, int); |
| 104 | static int sctp_send_asconf_add_ip(struct sock *, struct sockaddr *, int); |
| 105 | static int sctp_send_asconf_del_ip(struct sock *, struct sockaddr *, int); |
| 106 | static int sctp_send_asconf(struct sctp_association *asoc, |
| 107 | struct sctp_chunk *chunk); |
| 108 | static int sctp_do_bind(struct sock *, union sctp_addr *, int); |
| 109 | static int sctp_autobind(struct sock *sk); |
| 110 | static void sctp_sock_migrate(struct sock *, struct sock *, |
| 111 | struct sctp_association *, sctp_socket_type_t); |
| 112 | static char *sctp_hmac_alg = SCTP_COOKIE_HMAC_ALG; |
| 113 | |
Neil Horman | 4d93df0 | 2007-08-15 16:07:44 -0700 | [diff] [blame] | 114 | extern struct kmem_cache *sctp_bucket_cachep; |
Eric Dumazet | 8d987e5 | 2010-11-09 23:24:26 +0000 | [diff] [blame] | 115 | extern long sysctl_sctp_mem[3]; |
Neil Horman | 4d93df0 | 2007-08-15 16:07:44 -0700 | [diff] [blame] | 116 | extern int sysctl_sctp_rmem[3]; |
| 117 | extern int sysctl_sctp_wmem[3]; |
| 118 | |
Adrian Bunk | b6fa1a4 | 2007-09-12 15:18:00 +0200 | [diff] [blame] | 119 | static int sctp_memory_pressure; |
Eric Dumazet | 8d987e5 | 2010-11-09 23:24:26 +0000 | [diff] [blame] | 120 | static atomic_long_t sctp_memory_allocated; |
Eric Dumazet | 1748376 | 2008-11-25 21:16:35 -0800 | [diff] [blame] | 121 | struct percpu_counter sctp_sockets_allocated; |
Neil Horman | 4d93df0 | 2007-08-15 16:07:44 -0700 | [diff] [blame] | 122 | |
Pavel Emelyanov | 5c52ba1 | 2008-07-16 20:28:10 -0700 | [diff] [blame] | 123 | static void sctp_enter_memory_pressure(struct sock *sk) |
Neil Horman | 4d93df0 | 2007-08-15 16:07:44 -0700 | [diff] [blame] | 124 | { |
| 125 | sctp_memory_pressure = 1; |
| 126 | } |
| 127 | |
| 128 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | /* Get the sndbuf space available at the time on the association. */ |
| 130 | static inline int sctp_wspace(struct sctp_association *asoc) |
| 131 | { |
Neil Horman | 4d93df0 | 2007-08-15 16:07:44 -0700 | [diff] [blame] | 132 | int amt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | |
Neil Horman | 4d93df0 | 2007-08-15 16:07:44 -0700 | [diff] [blame] | 134 | if (asoc->ep->sndbuf_policy) |
| 135 | amt = asoc->sndbuf_used; |
| 136 | else |
Eric Dumazet | 31e6d36 | 2009-06-17 19:05:41 -0700 | [diff] [blame] | 137 | amt = sk_wmem_alloc_get(asoc->base.sk); |
Neil Horman | 4d93df0 | 2007-08-15 16:07:44 -0700 | [diff] [blame] | 138 | |
| 139 | if (amt >= asoc->base.sk->sk_sndbuf) { |
| 140 | if (asoc->base.sk->sk_userlocks & SOCK_SNDBUF_LOCK) |
| 141 | amt = 0; |
| 142 | else { |
| 143 | amt = sk_stream_wspace(asoc->base.sk); |
| 144 | if (amt < 0) |
| 145 | amt = 0; |
| 146 | } |
Neil Horman | 4eb701d | 2005-04-28 12:02:04 -0700 | [diff] [blame] | 147 | } else { |
Neil Horman | 4d93df0 | 2007-08-15 16:07:44 -0700 | [diff] [blame] | 148 | amt = asoc->base.sk->sk_sndbuf - amt; |
Neil Horman | 4eb701d | 2005-04-28 12:02:04 -0700 | [diff] [blame] | 149 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | return amt; |
| 151 | } |
| 152 | |
| 153 | /* Increment the used sndbuf space count of the corresponding association by |
| 154 | * the size of the outgoing data chunk. |
| 155 | * Also, set the skb destructor for sndbuf accounting later. |
| 156 | * |
| 157 | * Since it is always 1-1 between chunk and skb, and also a new skb is always |
| 158 | * allocated for chunk bundling in sctp_packet_transmit(), we can use the |
| 159 | * destructor in the data chunk skb for the purpose of the sndbuf space |
| 160 | * tracking. |
| 161 | */ |
| 162 | static inline void sctp_set_owner_w(struct sctp_chunk *chunk) |
| 163 | { |
| 164 | struct sctp_association *asoc = chunk->asoc; |
| 165 | struct sock *sk = asoc->base.sk; |
| 166 | |
| 167 | /* The sndbuf space is tracked per association. */ |
| 168 | sctp_association_hold(asoc); |
| 169 | |
Neil Horman | 4eb701d | 2005-04-28 12:02:04 -0700 | [diff] [blame] | 170 | skb_set_owner_w(chunk->skb, sk); |
| 171 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | chunk->skb->destructor = sctp_wfree; |
| 173 | /* Save the chunk pointer in skb for sctp_wfree to use later. */ |
| 174 | *((struct sctp_chunk **)(chunk->skb->cb)) = chunk; |
| 175 | |
Neil Horman | 4eb701d | 2005-04-28 12:02:04 -0700 | [diff] [blame] | 176 | asoc->sndbuf_used += SCTP_DATA_SNDSIZE(chunk) + |
| 177 | sizeof(struct sk_buff) + |
| 178 | sizeof(struct sctp_chunk); |
| 179 | |
Neil Horman | 4eb701d | 2005-04-28 12:02:04 -0700 | [diff] [blame] | 180 | atomic_add(sizeof(struct sctp_chunk), &sk->sk_wmem_alloc); |
Hideo Aoki | 3ab224b | 2007-12-31 00:11:19 -0800 | [diff] [blame] | 181 | sk->sk_wmem_queued += chunk->skb->truesize; |
| 182 | sk_mem_charge(sk, chunk->skb->truesize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | } |
| 184 | |
| 185 | /* Verify that this is a valid address. */ |
| 186 | static inline int sctp_verify_addr(struct sock *sk, union sctp_addr *addr, |
| 187 | int len) |
| 188 | { |
| 189 | struct sctp_af *af; |
| 190 | |
| 191 | /* Verify basic sockaddr. */ |
| 192 | af = sctp_sockaddr_af(sctp_sk(sk), addr, len); |
| 193 | if (!af) |
| 194 | return -EINVAL; |
| 195 | |
| 196 | /* Is this a valid SCTP address? */ |
Vlad Yasevich | 5636bef | 2006-06-17 22:55:35 -0700 | [diff] [blame] | 197 | if (!af->addr_valid(addr, sctp_sk(sk), NULL)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 198 | return -EINVAL; |
| 199 | |
| 200 | if (!sctp_sk(sk)->pf->send_verify(sctp_sk(sk), (addr))) |
| 201 | return -EINVAL; |
| 202 | |
| 203 | return 0; |
| 204 | } |
| 205 | |
| 206 | /* Look up the association by its id. If this is not a UDP-style |
| 207 | * socket, the ID field is always ignored. |
| 208 | */ |
| 209 | struct sctp_association *sctp_id2assoc(struct sock *sk, sctp_assoc_t id) |
| 210 | { |
| 211 | struct sctp_association *asoc = NULL; |
| 212 | |
| 213 | /* If this is not a UDP-style socket, assoc id should be ignored. */ |
| 214 | if (!sctp_style(sk, UDP)) { |
| 215 | /* Return NULL if the socket state is not ESTABLISHED. It |
| 216 | * could be a TCP-style listening socket or a socket which |
| 217 | * hasn't yet called connect() to establish an association. |
| 218 | */ |
| 219 | if (!sctp_sstate(sk, ESTABLISHED)) |
| 220 | return NULL; |
| 221 | |
| 222 | /* Get the first and the only association from the list. */ |
| 223 | if (!list_empty(&sctp_sk(sk)->ep->asocs)) |
| 224 | asoc = list_entry(sctp_sk(sk)->ep->asocs.next, |
| 225 | struct sctp_association, asocs); |
| 226 | return asoc; |
| 227 | } |
| 228 | |
| 229 | /* Otherwise this is a UDP-style socket. */ |
| 230 | if (!id || (id == (sctp_assoc_t)-1)) |
| 231 | return NULL; |
| 232 | |
| 233 | spin_lock_bh(&sctp_assocs_id_lock); |
| 234 | asoc = (struct sctp_association *)idr_find(&sctp_assocs_id, (int)id); |
| 235 | spin_unlock_bh(&sctp_assocs_id_lock); |
| 236 | |
| 237 | if (!asoc || (asoc->base.sk != sk) || asoc->base.dead) |
| 238 | return NULL; |
| 239 | |
| 240 | return asoc; |
| 241 | } |
| 242 | |
| 243 | /* Look up the transport from an address and an assoc id. If both address and |
| 244 | * id are specified, the associations matching the address and the id should be |
| 245 | * the same. |
| 246 | */ |
| 247 | static struct sctp_transport *sctp_addr_id2transport(struct sock *sk, |
| 248 | struct sockaddr_storage *addr, |
| 249 | sctp_assoc_t id) |
| 250 | { |
| 251 | struct sctp_association *addr_asoc = NULL, *id_asoc = NULL; |
| 252 | struct sctp_transport *transport; |
| 253 | union sctp_addr *laddr = (union sctp_addr *)addr; |
| 254 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | addr_asoc = sctp_endpoint_lookup_assoc(sctp_sk(sk)->ep, |
Al Viro | cd4ff03 | 2006-11-20 17:11:33 -0800 | [diff] [blame] | 256 | laddr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | &transport); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | |
| 259 | if (!addr_asoc) |
| 260 | return NULL; |
| 261 | |
| 262 | id_asoc = sctp_id2assoc(sk, id); |
| 263 | if (id_asoc && (id_asoc != addr_asoc)) |
| 264 | return NULL; |
| 265 | |
| 266 | sctp_get_pf_specific(sk->sk_family)->addr_v4map(sctp_sk(sk), |
| 267 | (union sctp_addr *)addr); |
| 268 | |
| 269 | return transport; |
| 270 | } |
| 271 | |
| 272 | /* API 3.1.2 bind() - UDP Style Syntax |
| 273 | * The syntax of bind() is, |
| 274 | * |
| 275 | * ret = bind(int sd, struct sockaddr *addr, int addrlen); |
| 276 | * |
| 277 | * sd - the socket descriptor returned by socket(). |
| 278 | * addr - the address structure (struct sockaddr_in or struct |
| 279 | * sockaddr_in6 [RFC 2553]), |
| 280 | * addr_len - the size of the address structure. |
| 281 | */ |
Frank Filz | 3f7a87d | 2005-06-20 13:14:57 -0700 | [diff] [blame] | 282 | SCTP_STATIC int sctp_bind(struct sock *sk, struct sockaddr *addr, int addr_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | { |
| 284 | int retval = 0; |
| 285 | |
| 286 | sctp_lock_sock(sk); |
| 287 | |
Frank Filz | 3f7a87d | 2005-06-20 13:14:57 -0700 | [diff] [blame] | 288 | SCTP_DEBUG_PRINTK("sctp_bind(sk: %p, addr: %p, addr_len: %d)\n", |
| 289 | sk, addr, addr_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | |
| 291 | /* Disallow binding twice. */ |
| 292 | if (!sctp_sk(sk)->ep->base.bind_addr.port) |
Frank Filz | 3f7a87d | 2005-06-20 13:14:57 -0700 | [diff] [blame] | 293 | retval = sctp_do_bind(sk, (union sctp_addr *)addr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | addr_len); |
| 295 | else |
| 296 | retval = -EINVAL; |
| 297 | |
| 298 | sctp_release_sock(sk); |
| 299 | |
| 300 | return retval; |
| 301 | } |
| 302 | |
| 303 | static long sctp_get_port_local(struct sock *, union sctp_addr *); |
| 304 | |
| 305 | /* Verify this is a valid sockaddr. */ |
| 306 | static struct sctp_af *sctp_sockaddr_af(struct sctp_sock *opt, |
| 307 | union sctp_addr *addr, int len) |
| 308 | { |
| 309 | struct sctp_af *af; |
| 310 | |
| 311 | /* Check minimum size. */ |
| 312 | if (len < sizeof (struct sockaddr)) |
| 313 | return NULL; |
| 314 | |
Vlad Yasevich | 7dab83d | 2008-07-18 23:05:40 -0700 | [diff] [blame] | 315 | /* V4 mapped address are really of AF_INET family */ |
| 316 | if (addr->sa.sa_family == AF_INET6 && |
| 317 | ipv6_addr_v4mapped(&addr->v6.sin6_addr)) { |
| 318 | if (!opt->pf->af_supported(AF_INET, opt)) |
| 319 | return NULL; |
| 320 | } else { |
| 321 | /* Does this PF support this AF? */ |
| 322 | if (!opt->pf->af_supported(addr->sa.sa_family, opt)) |
| 323 | return NULL; |
| 324 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | |
| 326 | /* If we get this far, af is valid. */ |
| 327 | af = sctp_get_af_specific(addr->sa.sa_family); |
| 328 | |
| 329 | if (len < af->sockaddr_len) |
| 330 | return NULL; |
| 331 | |
| 332 | return af; |
| 333 | } |
| 334 | |
| 335 | /* Bind a local address either to an endpoint or to an association. */ |
| 336 | SCTP_STATIC int sctp_do_bind(struct sock *sk, union sctp_addr *addr, int len) |
| 337 | { |
| 338 | struct sctp_sock *sp = sctp_sk(sk); |
| 339 | struct sctp_endpoint *ep = sp->ep; |
| 340 | struct sctp_bind_addr *bp = &ep->base.bind_addr; |
| 341 | struct sctp_af *af; |
| 342 | unsigned short snum; |
| 343 | int ret = 0; |
| 344 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | /* Common sockaddr verification. */ |
| 346 | af = sctp_sockaddr_af(sp, addr, len); |
Frank Filz | 3f7a87d | 2005-06-20 13:14:57 -0700 | [diff] [blame] | 347 | if (!af) { |
| 348 | SCTP_DEBUG_PRINTK("sctp_do_bind(sk: %p, newaddr: %p, len: %d) EINVAL\n", |
| 349 | sk, addr, len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 350 | return -EINVAL; |
Frank Filz | 3f7a87d | 2005-06-20 13:14:57 -0700 | [diff] [blame] | 351 | } |
| 352 | |
| 353 | snum = ntohs(addr->v4.sin_port); |
| 354 | |
| 355 | SCTP_DEBUG_PRINTK_IPADDR("sctp_do_bind(sk: %p, new addr: ", |
| 356 | ", port: %d, new port: %d, len: %d)\n", |
| 357 | sk, |
| 358 | addr, |
| 359 | bp->port, snum, |
| 360 | len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 361 | |
| 362 | /* PF specific bind() address verification. */ |
| 363 | if (!sp->pf->bind_verify(sp, addr)) |
| 364 | return -EADDRNOTAVAIL; |
| 365 | |
Vlad Yasevich | 8b35805 | 2007-05-15 17:14:58 -0400 | [diff] [blame] | 366 | /* We must either be unbound, or bind to the same port. |
| 367 | * It's OK to allow 0 ports if we are already bound. |
| 368 | * We'll just inhert an already bound port in this case |
| 369 | */ |
| 370 | if (bp->port) { |
| 371 | if (!snum) |
| 372 | snum = bp->port; |
| 373 | else if (snum != bp->port) { |
| 374 | SCTP_DEBUG_PRINTK("sctp_do_bind:" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | " New port %d does not match existing port " |
| 376 | "%d.\n", snum, bp->port); |
Vlad Yasevich | 8b35805 | 2007-05-15 17:14:58 -0400 | [diff] [blame] | 377 | return -EINVAL; |
| 378 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | } |
| 380 | |
| 381 | if (snum && snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE)) |
| 382 | return -EACCES; |
| 383 | |
Vlad Yasevich | 4e54064 | 2008-07-18 23:06:32 -0700 | [diff] [blame] | 384 | /* See if the address matches any of the addresses we may have |
| 385 | * already bound before checking against other endpoints. |
| 386 | */ |
| 387 | if (sctp_bind_addr_match(bp, addr, sp)) |
| 388 | return -EINVAL; |
| 389 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | /* Make sure we are allowed to bind here. |
| 391 | * The function sctp_get_port_local() does duplicate address |
| 392 | * detection. |
| 393 | */ |
Vlad Yasevich | 2772b49 | 2007-08-21 14:24:30 +0900 | [diff] [blame] | 394 | addr->v4.sin_port = htons(snum); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | if ((ret = sctp_get_port_local(sk, addr))) { |
Vlad Yasevich | 4e54064 | 2008-07-18 23:06:32 -0700 | [diff] [blame] | 396 | return -EADDRINUSE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | } |
| 398 | |
| 399 | /* Refresh ephemeral port. */ |
| 400 | if (!bp->port) |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 401 | bp->port = inet_sk(sk)->inet_num; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | |
Vlad Yasevich | 559cf71 | 2007-09-16 16:03:28 -0700 | [diff] [blame] | 403 | /* Add the address to the bind address list. |
| 404 | * Use GFP_ATOMIC since BHs will be disabled. |
| 405 | */ |
Vlad Yasevich | f57d96b | 2007-12-20 14:12:24 -0800 | [diff] [blame] | 406 | ret = sctp_add_bind_addr(bp, addr, SCTP_ADDR_SRC, GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 407 | |
| 408 | /* Copy back into socket for getsockname() use. */ |
| 409 | if (!ret) { |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 410 | inet_sk(sk)->inet_sport = htons(inet_sk(sk)->inet_num); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | af->to_sk_saddr(addr, sk); |
| 412 | } |
| 413 | |
| 414 | return ret; |
| 415 | } |
| 416 | |
| 417 | /* ADDIP Section 4.1.1 Congestion Control of ASCONF Chunks |
| 418 | * |
YOSHIFUJI Hideaki | d808ad9 | 2007-02-09 23:25:18 +0900 | [diff] [blame] | 419 | * R1) One and only one ASCONF Chunk MAY be in transit and unacknowledged |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 420 | * at any one time. If a sender, after sending an ASCONF chunk, decides |
YOSHIFUJI Hideaki | d808ad9 | 2007-02-09 23:25:18 +0900 | [diff] [blame] | 421 | * it needs to transfer another ASCONF Chunk, it MUST wait until the |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | * ASCONF-ACK Chunk returns from the previous ASCONF Chunk before sending a |
YOSHIFUJI Hideaki | d808ad9 | 2007-02-09 23:25:18 +0900 | [diff] [blame] | 423 | * subsequent ASCONF. Note this restriction binds each side, so at any |
| 424 | * time two ASCONF may be in-transit on any given association (one sent |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 425 | * from each endpoint). |
| 426 | */ |
| 427 | static int sctp_send_asconf(struct sctp_association *asoc, |
| 428 | struct sctp_chunk *chunk) |
| 429 | { |
| 430 | int retval = 0; |
| 431 | |
| 432 | /* If there is an outstanding ASCONF chunk, queue it for later |
| 433 | * transmission. |
YOSHIFUJI Hideaki | d808ad9 | 2007-02-09 23:25:18 +0900 | [diff] [blame] | 434 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | if (asoc->addip_last_asconf) { |
David S. Miller | 79af02c | 2005-07-08 21:47:49 -0700 | [diff] [blame] | 436 | list_add_tail(&chunk->list, &asoc->addip_chunk_list); |
YOSHIFUJI Hideaki | d808ad9 | 2007-02-09 23:25:18 +0900 | [diff] [blame] | 437 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 438 | } |
| 439 | |
| 440 | /* Hold the chunk until an ASCONF_ACK is received. */ |
| 441 | sctp_chunk_hold(chunk); |
| 442 | retval = sctp_primitive_ASCONF(asoc, chunk); |
| 443 | if (retval) |
| 444 | sctp_chunk_free(chunk); |
| 445 | else |
| 446 | asoc->addip_last_asconf = chunk; |
| 447 | |
| 448 | out: |
| 449 | return retval; |
| 450 | } |
| 451 | |
| 452 | /* Add a list of addresses as bind addresses to local endpoint or |
| 453 | * association. |
| 454 | * |
| 455 | * Basically run through each address specified in the addrs/addrcnt |
| 456 | * array/length pair, determine if it is IPv6 or IPv4 and call |
| 457 | * sctp_do_bind() on it. |
| 458 | * |
| 459 | * If any of them fails, then the operation will be reversed and the |
| 460 | * ones that were added will be removed. |
| 461 | * |
| 462 | * Only sctp_setsockopt_bindx() is supposed to call this function. |
| 463 | */ |
sebastian@breakpoint.cc | 0467521 | 2007-07-26 23:21:31 +0200 | [diff] [blame] | 464 | static int sctp_bindx_add(struct sock *sk, struct sockaddr *addrs, int addrcnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 465 | { |
| 466 | int cnt; |
| 467 | int retval = 0; |
| 468 | void *addr_buf; |
| 469 | struct sockaddr *sa_addr; |
| 470 | struct sctp_af *af; |
| 471 | |
| 472 | SCTP_DEBUG_PRINTK("sctp_bindx_add (sk: %p, addrs: %p, addrcnt: %d)\n", |
| 473 | sk, addrs, addrcnt); |
| 474 | |
| 475 | addr_buf = addrs; |
| 476 | for (cnt = 0; cnt < addrcnt; cnt++) { |
| 477 | /* The list may contain either IPv4 or IPv6 address; |
| 478 | * determine the address length for walking thru the list. |
| 479 | */ |
Joe Perches | ea11073 | 2011-06-13 16:21:26 +0000 | [diff] [blame] | 480 | sa_addr = addr_buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 481 | af = sctp_get_af_specific(sa_addr->sa_family); |
| 482 | if (!af) { |
| 483 | retval = -EINVAL; |
| 484 | goto err_bindx_add; |
| 485 | } |
| 486 | |
YOSHIFUJI Hideaki | d808ad9 | 2007-02-09 23:25:18 +0900 | [diff] [blame] | 487 | retval = sctp_do_bind(sk, (union sctp_addr *)sa_addr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | af->sockaddr_len); |
| 489 | |
| 490 | addr_buf += af->sockaddr_len; |
| 491 | |
| 492 | err_bindx_add: |
| 493 | if (retval < 0) { |
| 494 | /* Failed. Cleanup the ones that have been added */ |
| 495 | if (cnt > 0) |
| 496 | sctp_bindx_rem(sk, addrs, cnt); |
| 497 | return retval; |
| 498 | } |
| 499 | } |
| 500 | |
| 501 | return retval; |
| 502 | } |
| 503 | |
| 504 | /* Send an ASCONF chunk with Add IP address parameters to all the peers of the |
| 505 | * associations that are part of the endpoint indicating that a list of local |
| 506 | * addresses are added to the endpoint. |
| 507 | * |
YOSHIFUJI Hideaki | d808ad9 | 2007-02-09 23:25:18 +0900 | [diff] [blame] | 508 | * If any of the addresses is already in the bind address list of the |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | * association, we do not send the chunk for that association. But it will not |
| 510 | * affect other associations. |
| 511 | * |
| 512 | * Only sctp_setsockopt_bindx() is supposed to call this function. |
| 513 | */ |
YOSHIFUJI Hideaki | d808ad9 | 2007-02-09 23:25:18 +0900 | [diff] [blame] | 514 | static int sctp_send_asconf_add_ip(struct sock *sk, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | struct sockaddr *addrs, |
| 516 | int addrcnt) |
| 517 | { |
| 518 | struct sctp_sock *sp; |
| 519 | struct sctp_endpoint *ep; |
| 520 | struct sctp_association *asoc; |
| 521 | struct sctp_bind_addr *bp; |
| 522 | struct sctp_chunk *chunk; |
| 523 | struct sctp_sockaddr_entry *laddr; |
| 524 | union sctp_addr *addr; |
Sridhar Samudrala | dc022a9 | 2006-07-21 14:49:25 -0700 | [diff] [blame] | 525 | union sctp_addr saveaddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | void *addr_buf; |
| 527 | struct sctp_af *af; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | struct list_head *p; |
| 529 | int i; |
| 530 | int retval = 0; |
| 531 | |
| 532 | if (!sctp_addip_enable) |
| 533 | return retval; |
| 534 | |
| 535 | sp = sctp_sk(sk); |
| 536 | ep = sp->ep; |
| 537 | |
| 538 | SCTP_DEBUG_PRINTK("%s: (sk: %p, addrs: %p, addrcnt: %d)\n", |
Harvey Harrison | 0dc4787 | 2008-03-05 20:47:47 -0800 | [diff] [blame] | 539 | __func__, sk, addrs, addrcnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 540 | |
Robert P. J. Day | 9dbc15f | 2008-04-12 18:54:24 -0700 | [diff] [blame] | 541 | list_for_each_entry(asoc, &ep->asocs, asocs) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | |
| 543 | if (!asoc->peer.asconf_capable) |
| 544 | continue; |
| 545 | |
| 546 | if (asoc->peer.addip_disabled_mask & SCTP_PARAM_ADD_IP) |
| 547 | continue; |
| 548 | |
| 549 | if (!sctp_state(asoc, ESTABLISHED)) |
| 550 | continue; |
| 551 | |
| 552 | /* Check if any address in the packed array of addresses is |
YOSHIFUJI Hideaki | d808ad9 | 2007-02-09 23:25:18 +0900 | [diff] [blame] | 553 | * in the bind address list of the association. If so, |
| 554 | * do not send the asconf chunk to its peer, but continue with |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | * other associations. |
| 556 | */ |
| 557 | addr_buf = addrs; |
| 558 | for (i = 0; i < addrcnt; i++) { |
Joe Perches | ea11073 | 2011-06-13 16:21:26 +0000 | [diff] [blame] | 559 | addr = addr_buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 560 | af = sctp_get_af_specific(addr->v4.sin_family); |
| 561 | if (!af) { |
| 562 | retval = -EINVAL; |
| 563 | goto out; |
| 564 | } |
| 565 | |
| 566 | if (sctp_assoc_lookup_laddr(asoc, addr)) |
| 567 | break; |
| 568 | |
| 569 | addr_buf += af->sockaddr_len; |
| 570 | } |
| 571 | if (i < addrcnt) |
| 572 | continue; |
| 573 | |
Vlad Yasevich | 559cf71 | 2007-09-16 16:03:28 -0700 | [diff] [blame] | 574 | /* Use the first valid address in bind addr list of |
| 575 | * association as Address Parameter of ASCONF CHUNK. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 577 | bp = &asoc->base.bind_addr; |
| 578 | p = bp->address_list.next; |
| 579 | laddr = list_entry(p, struct sctp_sockaddr_entry, list); |
Al Viro | 5ae955c | 2006-11-20 17:22:08 -0800 | [diff] [blame] | 580 | chunk = sctp_make_asconf_update_ip(asoc, &laddr->a, addrs, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 581 | addrcnt, SCTP_PARAM_ADD_IP); |
| 582 | if (!chunk) { |
| 583 | retval = -ENOMEM; |
| 584 | goto out; |
| 585 | } |
| 586 | |
Sridhar Samudrala | dc022a9 | 2006-07-21 14:49:25 -0700 | [diff] [blame] | 587 | /* Add the new addresses to the bind address list with |
| 588 | * use_as_src set to 0. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | */ |
Sridhar Samudrala | dc022a9 | 2006-07-21 14:49:25 -0700 | [diff] [blame] | 590 | addr_buf = addrs; |
| 591 | for (i = 0; i < addrcnt; i++) { |
Joe Perches | ea11073 | 2011-06-13 16:21:26 +0000 | [diff] [blame] | 592 | addr = addr_buf; |
Sridhar Samudrala | dc022a9 | 2006-07-21 14:49:25 -0700 | [diff] [blame] | 593 | af = sctp_get_af_specific(addr->v4.sin_family); |
| 594 | memcpy(&saveaddr, addr, af->sockaddr_len); |
Vlad Yasevich | f57d96b | 2007-12-20 14:12:24 -0800 | [diff] [blame] | 595 | retval = sctp_add_bind_addr(bp, &saveaddr, |
| 596 | SCTP_ADDR_NEW, GFP_ATOMIC); |
Sridhar Samudrala | dc022a9 | 2006-07-21 14:49:25 -0700 | [diff] [blame] | 597 | addr_buf += af->sockaddr_len; |
| 598 | } |
Michio Honda | 8a07eb0 | 2011-04-26 20:19:36 +0900 | [diff] [blame] | 599 | if (asoc->src_out_of_asoc_ok) { |
| 600 | struct sctp_transport *trans; |
| 601 | |
| 602 | list_for_each_entry(trans, |
| 603 | &asoc->peer.transport_addr_list, transports) { |
| 604 | /* Clear the source and route cache */ |
| 605 | dst_release(trans->dst); |
| 606 | trans->cwnd = min(4*asoc->pathmtu, max_t(__u32, |
| 607 | 2*asoc->pathmtu, 4380)); |
| 608 | trans->ssthresh = asoc->peer.i.a_rwnd; |
| 609 | trans->rto = asoc->rto_initial; |
| 610 | trans->rtt = trans->srtt = trans->rttvar = 0; |
| 611 | sctp_transport_route(trans, NULL, |
| 612 | sctp_sk(asoc->base.sk)); |
| 613 | } |
| 614 | } |
| 615 | retval = sctp_send_asconf(asoc, chunk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 616 | } |
| 617 | |
| 618 | out: |
| 619 | return retval; |
| 620 | } |
| 621 | |
| 622 | /* Remove a list of addresses from bind addresses list. Do not remove the |
| 623 | * last address. |
| 624 | * |
| 625 | * Basically run through each address specified in the addrs/addrcnt |
| 626 | * array/length pair, determine if it is IPv6 or IPv4 and call |
| 627 | * sctp_del_bind() on it. |
| 628 | * |
| 629 | * If any of them fails, then the operation will be reversed and the |
| 630 | * ones that were removed will be added back. |
| 631 | * |
| 632 | * At least one address has to be left; if only one address is |
| 633 | * available, the operation will return -EBUSY. |
| 634 | * |
| 635 | * Only sctp_setsockopt_bindx() is supposed to call this function. |
| 636 | */ |
sebastian@breakpoint.cc | 0467521 | 2007-07-26 23:21:31 +0200 | [diff] [blame] | 637 | static int sctp_bindx_rem(struct sock *sk, struct sockaddr *addrs, int addrcnt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 638 | { |
| 639 | struct sctp_sock *sp = sctp_sk(sk); |
| 640 | struct sctp_endpoint *ep = sp->ep; |
| 641 | int cnt; |
| 642 | struct sctp_bind_addr *bp = &ep->base.bind_addr; |
| 643 | int retval = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 644 | void *addr_buf; |
Al Viro | c9a0850 | 2006-11-20 17:07:48 -0800 | [diff] [blame] | 645 | union sctp_addr *sa_addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 646 | struct sctp_af *af; |
| 647 | |
| 648 | SCTP_DEBUG_PRINTK("sctp_bindx_rem (sk: %p, addrs: %p, addrcnt: %d)\n", |
| 649 | sk, addrs, addrcnt); |
| 650 | |
| 651 | addr_buf = addrs; |
| 652 | for (cnt = 0; cnt < addrcnt; cnt++) { |
| 653 | /* If the bind address list is empty or if there is only one |
| 654 | * bind address, there is nothing more to be removed (we need |
| 655 | * at least one address here). |
| 656 | */ |
| 657 | if (list_empty(&bp->address_list) || |
| 658 | (sctp_list_single_entry(&bp->address_list))) { |
| 659 | retval = -EBUSY; |
| 660 | goto err_bindx_rem; |
| 661 | } |
| 662 | |
Joe Perches | ea11073 | 2011-06-13 16:21:26 +0000 | [diff] [blame] | 663 | sa_addr = addr_buf; |
Al Viro | c9a0850 | 2006-11-20 17:07:48 -0800 | [diff] [blame] | 664 | af = sctp_get_af_specific(sa_addr->sa.sa_family); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | if (!af) { |
| 666 | retval = -EINVAL; |
| 667 | goto err_bindx_rem; |
| 668 | } |
Paolo Galtieri | 0304ff8a | 2007-04-17 12:52:36 -0700 | [diff] [blame] | 669 | |
| 670 | if (!af->addr_valid(sa_addr, sp, NULL)) { |
| 671 | retval = -EADDRNOTAVAIL; |
| 672 | goto err_bindx_rem; |
| 673 | } |
| 674 | |
Vlad Yasevich | ee9cbac | 2011-04-18 19:14:47 +0000 | [diff] [blame] | 675 | if (sa_addr->v4.sin_port && |
| 676 | sa_addr->v4.sin_port != htons(bp->port)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 677 | retval = -EINVAL; |
| 678 | goto err_bindx_rem; |
| 679 | } |
| 680 | |
Vlad Yasevich | ee9cbac | 2011-04-18 19:14:47 +0000 | [diff] [blame] | 681 | if (!sa_addr->v4.sin_port) |
| 682 | sa_addr->v4.sin_port = htons(bp->port); |
| 683 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 684 | /* FIXME - There is probably a need to check if sk->sk_saddr and |
| 685 | * sk->sk_rcv_addr are currently set to one of the addresses to |
| 686 | * be removed. This is something which needs to be looked into |
| 687 | * when we are fixing the outstanding issues with multi-homing |
| 688 | * socket routing and failover schemes. Refer to comments in |
| 689 | * sctp_do_bind(). -daisy |
| 690 | */ |
Vlad Yasevich | 0ed90fb | 2007-10-24 16:10:00 -0400 | [diff] [blame] | 691 | retval = sctp_del_bind_addr(bp, sa_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 692 | |
| 693 | addr_buf += af->sockaddr_len; |
| 694 | err_bindx_rem: |
| 695 | if (retval < 0) { |
| 696 | /* Failed. Add the ones that has been removed back */ |
| 697 | if (cnt > 0) |
| 698 | sctp_bindx_add(sk, addrs, cnt); |
| 699 | return retval; |
| 700 | } |
| 701 | } |
| 702 | |
| 703 | return retval; |
| 704 | } |
| 705 | |
| 706 | /* Send an ASCONF chunk with Delete IP address parameters to all the peers of |
| 707 | * the associations that are part of the endpoint indicating that a list of |
| 708 | * local addresses are removed from the endpoint. |
| 709 | * |
YOSHIFUJI Hideaki | d808ad9 | 2007-02-09 23:25:18 +0900 | [diff] [blame] | 710 | * If any of the addresses is already in the bind address list of the |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 711 | * association, we do not send the chunk for that association. But it will not |
| 712 | * affect other associations. |
| 713 | * |
| 714 | * Only sctp_setsockopt_bindx() is supposed to call this function. |
| 715 | */ |
| 716 | static int sctp_send_asconf_del_ip(struct sock *sk, |
| 717 | struct sockaddr *addrs, |
| 718 | int addrcnt) |
| 719 | { |
| 720 | struct sctp_sock *sp; |
| 721 | struct sctp_endpoint *ep; |
| 722 | struct sctp_association *asoc; |
Sridhar Samudrala | dc022a9 | 2006-07-21 14:49:25 -0700 | [diff] [blame] | 723 | struct sctp_transport *transport; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 724 | struct sctp_bind_addr *bp; |
| 725 | struct sctp_chunk *chunk; |
| 726 | union sctp_addr *laddr; |
| 727 | void *addr_buf; |
| 728 | struct sctp_af *af; |
Sridhar Samudrala | dc022a9 | 2006-07-21 14:49:25 -0700 | [diff] [blame] | 729 | struct sctp_sockaddr_entry *saddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 730 | int i; |
| 731 | int retval = 0; |
Michio Honda | 8a07eb0 | 2011-04-26 20:19:36 +0900 | [diff] [blame] | 732 | int stored = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 733 | |
Michio Honda | 8a07eb0 | 2011-04-26 20:19:36 +0900 | [diff] [blame] | 734 | chunk = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 735 | if (!sctp_addip_enable) |
| 736 | return retval; |
| 737 | |
| 738 | sp = sctp_sk(sk); |
| 739 | ep = sp->ep; |
| 740 | |
| 741 | SCTP_DEBUG_PRINTK("%s: (sk: %p, addrs: %p, addrcnt: %d)\n", |
Harvey Harrison | 0dc4787 | 2008-03-05 20:47:47 -0800 | [diff] [blame] | 742 | __func__, sk, addrs, addrcnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 743 | |
Robert P. J. Day | 9dbc15f | 2008-04-12 18:54:24 -0700 | [diff] [blame] | 744 | list_for_each_entry(asoc, &ep->asocs, asocs) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 745 | |
| 746 | if (!asoc->peer.asconf_capable) |
| 747 | continue; |
| 748 | |
| 749 | if (asoc->peer.addip_disabled_mask & SCTP_PARAM_DEL_IP) |
| 750 | continue; |
| 751 | |
| 752 | if (!sctp_state(asoc, ESTABLISHED)) |
| 753 | continue; |
| 754 | |
| 755 | /* Check if any address in the packed array of addresses is |
YOSHIFUJI Hideaki | d808ad9 | 2007-02-09 23:25:18 +0900 | [diff] [blame] | 756 | * not present in the bind address list of the association. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 757 | * If so, do not send the asconf chunk to its peer, but |
| 758 | * continue with other associations. |
| 759 | */ |
| 760 | addr_buf = addrs; |
| 761 | for (i = 0; i < addrcnt; i++) { |
Joe Perches | ea11073 | 2011-06-13 16:21:26 +0000 | [diff] [blame] | 762 | laddr = addr_buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 763 | af = sctp_get_af_specific(laddr->v4.sin_family); |
| 764 | if (!af) { |
| 765 | retval = -EINVAL; |
| 766 | goto out; |
| 767 | } |
| 768 | |
| 769 | if (!sctp_assoc_lookup_laddr(asoc, laddr)) |
| 770 | break; |
| 771 | |
| 772 | addr_buf += af->sockaddr_len; |
| 773 | } |
| 774 | if (i < addrcnt) |
| 775 | continue; |
| 776 | |
| 777 | /* Find one address in the association's bind address list |
| 778 | * that is not in the packed array of addresses. This is to |
| 779 | * make sure that we do not delete all the addresses in the |
| 780 | * association. |
| 781 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 782 | bp = &asoc->base.bind_addr; |
| 783 | laddr = sctp_find_unmatch_addr(bp, (union sctp_addr *)addrs, |
| 784 | addrcnt, sp); |
Michio Honda | 8a07eb0 | 2011-04-26 20:19:36 +0900 | [diff] [blame] | 785 | if ((laddr == NULL) && (addrcnt == 1)) { |
| 786 | if (asoc->asconf_addr_del_pending) |
| 787 | continue; |
| 788 | asoc->asconf_addr_del_pending = |
| 789 | kzalloc(sizeof(union sctp_addr), GFP_ATOMIC); |
Michio Honda | 6d65e5e | 2011-06-10 16:42:14 +0900 | [diff] [blame] | 790 | if (asoc->asconf_addr_del_pending == NULL) { |
| 791 | retval = -ENOMEM; |
| 792 | goto out; |
| 793 | } |
Michio Honda | 8a07eb0 | 2011-04-26 20:19:36 +0900 | [diff] [blame] | 794 | asoc->asconf_addr_del_pending->sa.sa_family = |
| 795 | addrs->sa_family; |
| 796 | asoc->asconf_addr_del_pending->v4.sin_port = |
| 797 | htons(bp->port); |
| 798 | if (addrs->sa_family == AF_INET) { |
| 799 | struct sockaddr_in *sin; |
| 800 | |
| 801 | sin = (struct sockaddr_in *)addrs; |
| 802 | asoc->asconf_addr_del_pending->v4.sin_addr.s_addr = sin->sin_addr.s_addr; |
| 803 | } else if (addrs->sa_family == AF_INET6) { |
| 804 | struct sockaddr_in6 *sin6; |
| 805 | |
| 806 | sin6 = (struct sockaddr_in6 *)addrs; |
Alexey Dobriyan | 4e3fd7a | 2011-11-21 03:39:03 +0000 | [diff] [blame] | 807 | asoc->asconf_addr_del_pending->v6.sin6_addr = sin6->sin6_addr; |
Michio Honda | 8a07eb0 | 2011-04-26 20:19:36 +0900 | [diff] [blame] | 808 | } |
| 809 | SCTP_DEBUG_PRINTK_IPADDR("send_asconf_del_ip: keep the last address asoc: %p ", |
| 810 | " at %p\n", asoc, asoc->asconf_addr_del_pending, |
| 811 | asoc->asconf_addr_del_pending); |
| 812 | asoc->src_out_of_asoc_ok = 1; |
| 813 | stored = 1; |
| 814 | goto skip_mkasconf; |
| 815 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 816 | |
Vlad Yasevich | 559cf71 | 2007-09-16 16:03:28 -0700 | [diff] [blame] | 817 | /* We do not need RCU protection throughout this loop |
| 818 | * because this is done under a socket lock from the |
| 819 | * setsockopt call. |
| 820 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 821 | chunk = sctp_make_asconf_update_ip(asoc, laddr, addrs, addrcnt, |
| 822 | SCTP_PARAM_DEL_IP); |
| 823 | if (!chunk) { |
| 824 | retval = -ENOMEM; |
| 825 | goto out; |
| 826 | } |
| 827 | |
Michio Honda | 8a07eb0 | 2011-04-26 20:19:36 +0900 | [diff] [blame] | 828 | skip_mkasconf: |
Sridhar Samudrala | dc022a9 | 2006-07-21 14:49:25 -0700 | [diff] [blame] | 829 | /* Reset use_as_src flag for the addresses in the bind address |
| 830 | * list that are to be deleted. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 831 | */ |
Sridhar Samudrala | dc022a9 | 2006-07-21 14:49:25 -0700 | [diff] [blame] | 832 | addr_buf = addrs; |
| 833 | for (i = 0; i < addrcnt; i++) { |
Joe Perches | ea11073 | 2011-06-13 16:21:26 +0000 | [diff] [blame] | 834 | laddr = addr_buf; |
Sridhar Samudrala | dc022a9 | 2006-07-21 14:49:25 -0700 | [diff] [blame] | 835 | af = sctp_get_af_specific(laddr->v4.sin_family); |
Vlad Yasevich | 559cf71 | 2007-09-16 16:03:28 -0700 | [diff] [blame] | 836 | list_for_each_entry(saddr, &bp->address_list, list) { |
Al Viro | 5f242a1 | 2006-11-20 17:05:23 -0800 | [diff] [blame] | 837 | if (sctp_cmp_addr_exact(&saddr->a, laddr)) |
Vlad Yasevich | f57d96b | 2007-12-20 14:12:24 -0800 | [diff] [blame] | 838 | saddr->state = SCTP_ADDR_DEL; |
Sridhar Samudrala | dc022a9 | 2006-07-21 14:49:25 -0700 | [diff] [blame] | 839 | } |
| 840 | addr_buf += af->sockaddr_len; |
| 841 | } |
Sridhar Samudrala | dc022a9 | 2006-07-21 14:49:25 -0700 | [diff] [blame] | 842 | |
| 843 | /* Update the route and saddr entries for all the transports |
| 844 | * as some of the addresses in the bind address list are |
| 845 | * about to be deleted and cannot be used as source addresses. |
| 846 | */ |
Robert P. J. Day | 9dbc15f | 2008-04-12 18:54:24 -0700 | [diff] [blame] | 847 | list_for_each_entry(transport, &asoc->peer.transport_addr_list, |
| 848 | transports) { |
Sridhar Samudrala | dc022a9 | 2006-07-21 14:49:25 -0700 | [diff] [blame] | 849 | dst_release(transport->dst); |
| 850 | sctp_transport_route(transport, NULL, |
| 851 | sctp_sk(asoc->base.sk)); |
| 852 | } |
| 853 | |
Michio Honda | 8a07eb0 | 2011-04-26 20:19:36 +0900 | [diff] [blame] | 854 | if (stored) |
| 855 | /* We don't need to transmit ASCONF */ |
| 856 | continue; |
Sridhar Samudrala | dc022a9 | 2006-07-21 14:49:25 -0700 | [diff] [blame] | 857 | retval = sctp_send_asconf(asoc, chunk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 858 | } |
| 859 | out: |
| 860 | return retval; |
| 861 | } |
| 862 | |
Michio Honda | 9f7d653 | 2011-04-26 19:32:51 +0900 | [diff] [blame] | 863 | /* set addr events to assocs in the endpoint. ep and addr_wq must be locked */ |
| 864 | int sctp_asconf_mgmt(struct sctp_sock *sp, struct sctp_sockaddr_entry *addrw) |
| 865 | { |
| 866 | struct sock *sk = sctp_opt2sk(sp); |
| 867 | union sctp_addr *addr; |
| 868 | struct sctp_af *af; |
| 869 | |
| 870 | /* It is safe to write port space in caller. */ |
| 871 | addr = &addrw->a; |
| 872 | addr->v4.sin_port = htons(sp->ep->base.bind_addr.port); |
| 873 | af = sctp_get_af_specific(addr->sa.sa_family); |
| 874 | if (!af) |
| 875 | return -EINVAL; |
| 876 | if (sctp_verify_addr(sk, addr, af->sockaddr_len)) |
| 877 | return -EINVAL; |
| 878 | |
| 879 | if (addrw->state == SCTP_ADDR_NEW) |
| 880 | return sctp_send_asconf_add_ip(sk, (struct sockaddr *)addr, 1); |
| 881 | else |
| 882 | return sctp_send_asconf_del_ip(sk, (struct sockaddr *)addr, 1); |
| 883 | } |
| 884 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 885 | /* Helper for tunneling sctp_bindx() requests through sctp_setsockopt() |
| 886 | * |
| 887 | * API 8.1 |
| 888 | * int sctp_bindx(int sd, struct sockaddr *addrs, int addrcnt, |
| 889 | * int flags); |
| 890 | * |
| 891 | * If sd is an IPv4 socket, the addresses passed must be IPv4 addresses. |
| 892 | * If the sd is an IPv6 socket, the addresses passed can either be IPv4 |
| 893 | * or IPv6 addresses. |
| 894 | * |
| 895 | * A single address may be specified as INADDR_ANY or IN6ADDR_ANY, see |
| 896 | * Section 3.1.2 for this usage. |
| 897 | * |
| 898 | * addrs is a pointer to an array of one or more socket addresses. Each |
| 899 | * address is contained in its appropriate structure (i.e. struct |
| 900 | * sockaddr_in or struct sockaddr_in6) the family of the address type |
Ville Nuorvala | 23c435f | 2006-10-16 22:08:28 -0700 | [diff] [blame] | 901 | * must be used to distinguish the address length (note that this |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 902 | * representation is termed a "packed array" of addresses). The caller |
| 903 | * specifies the number of addresses in the array with addrcnt. |
| 904 | * |
| 905 | * On success, sctp_bindx() returns 0. On failure, sctp_bindx() returns |
| 906 | * -1, and sets errno to the appropriate error code. |
| 907 | * |
| 908 | * For SCTP, the port given in each socket address must be the same, or |
| 909 | * sctp_bindx() will fail, setting errno to EINVAL. |
| 910 | * |
| 911 | * The flags parameter is formed from the bitwise OR of zero or more of |
| 912 | * the following currently defined flags: |
| 913 | * |
| 914 | * SCTP_BINDX_ADD_ADDR |
| 915 | * |
| 916 | * SCTP_BINDX_REM_ADDR |
| 917 | * |
| 918 | * SCTP_BINDX_ADD_ADDR directs SCTP to add the given addresses to the |
| 919 | * association, and SCTP_BINDX_REM_ADDR directs SCTP to remove the given |
| 920 | * addresses from the association. The two flags are mutually exclusive; |
| 921 | * if both are given, sctp_bindx() will fail with EINVAL. A caller may |
| 922 | * not remove all addresses from an association; sctp_bindx() will |
| 923 | * reject such an attempt with EINVAL. |
| 924 | * |
| 925 | * An application can use sctp_bindx(SCTP_BINDX_ADD_ADDR) to associate |
| 926 | * additional addresses with an endpoint after calling bind(). Or use |
| 927 | * sctp_bindx(SCTP_BINDX_REM_ADDR) to remove some addresses a listening |
| 928 | * socket is associated with so that no new association accepted will be |
| 929 | * associated with those addresses. If the endpoint supports dynamic |
| 930 | * address a SCTP_BINDX_REM_ADDR or SCTP_BINDX_ADD_ADDR may cause a |
| 931 | * endpoint to send the appropriate message to the peer to change the |
| 932 | * peers address lists. |
| 933 | * |
| 934 | * Adding and removing addresses from a connected association is |
| 935 | * optional functionality. Implementations that do not support this |
| 936 | * functionality should return EOPNOTSUPP. |
| 937 | * |
| 938 | * Basically do nothing but copying the addresses from user to kernel |
| 939 | * land and invoking either sctp_bindx_add() or sctp_bindx_rem() on the sk. |
Frank Filz | 3f7a87d | 2005-06-20 13:14:57 -0700 | [diff] [blame] | 940 | * This is used for tunneling the sctp_bindx() request through sctp_setsockopt() |
| 941 | * from userspace. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 942 | * |
| 943 | * We don't use copy_from_user() for optimization: we first do the |
| 944 | * sanity checks (buffer size -fast- and access check-healthy |
| 945 | * pointer); if all of those succeed, then we can alloc the memory |
| 946 | * (expensive operation) needed to copy the data to kernel. Then we do |
| 947 | * the copying without checking the user space area |
| 948 | * (__copy_from_user()). |
| 949 | * |
| 950 | * On exit there is no need to do sockfd_put(), sys_setsockopt() does |
| 951 | * it. |
| 952 | * |
| 953 | * sk The sk of the socket |
| 954 | * addrs The pointer to the addresses in user land |
| 955 | * addrssize Size of the addrs buffer |
| 956 | * op Operation to perform (add or remove, see the flags of |
| 957 | * sctp_bindx) |
| 958 | * |
| 959 | * Returns 0 if ok, <0 errno code on error. |
| 960 | */ |
| 961 | SCTP_STATIC int sctp_setsockopt_bindx(struct sock* sk, |
| 962 | struct sockaddr __user *addrs, |
| 963 | int addrs_size, int op) |
| 964 | { |
| 965 | struct sockaddr *kaddrs; |
| 966 | int err; |
| 967 | int addrcnt = 0; |
| 968 | int walk_size = 0; |
| 969 | struct sockaddr *sa_addr; |
| 970 | void *addr_buf; |
| 971 | struct sctp_af *af; |
| 972 | |
| 973 | SCTP_DEBUG_PRINTK("sctp_setsocktopt_bindx: sk %p addrs %p" |
| 974 | " addrs_size %d opt %d\n", sk, addrs, addrs_size, op); |
| 975 | |
| 976 | if (unlikely(addrs_size <= 0)) |
| 977 | return -EINVAL; |
| 978 | |
| 979 | /* Check the user passed a healthy pointer. */ |
| 980 | if (unlikely(!access_ok(VERIFY_READ, addrs, addrs_size))) |
| 981 | return -EFAULT; |
| 982 | |
| 983 | /* Alloc space for the address array in kernel memory. */ |
Kris Katterjohn | 8b3a700 | 2006-01-11 15:56:43 -0800 | [diff] [blame] | 984 | kaddrs = kmalloc(addrs_size, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 985 | if (unlikely(!kaddrs)) |
| 986 | return -ENOMEM; |
| 987 | |
| 988 | if (__copy_from_user(kaddrs, addrs, addrs_size)) { |
| 989 | kfree(kaddrs); |
| 990 | return -EFAULT; |
| 991 | } |
| 992 | |
YOSHIFUJI Hideaki | d808ad9 | 2007-02-09 23:25:18 +0900 | [diff] [blame] | 993 | /* Walk through the addrs buffer and count the number of addresses. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 994 | addr_buf = kaddrs; |
| 995 | while (walk_size < addrs_size) { |
Dan Rosenberg | d7e0d19 | 2010-10-01 11:16:58 +0000 | [diff] [blame] | 996 | if (walk_size + sizeof(sa_family_t) > addrs_size) { |
| 997 | kfree(kaddrs); |
| 998 | return -EINVAL; |
| 999 | } |
| 1000 | |
Joe Perches | ea11073 | 2011-06-13 16:21:26 +0000 | [diff] [blame] | 1001 | sa_addr = addr_buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1002 | af = sctp_get_af_specific(sa_addr->sa_family); |
| 1003 | |
| 1004 | /* If the address family is not supported or if this address |
| 1005 | * causes the address buffer to overflow return EINVAL. |
YOSHIFUJI Hideaki | d808ad9 | 2007-02-09 23:25:18 +0900 | [diff] [blame] | 1006 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1007 | if (!af || (walk_size + af->sockaddr_len) > addrs_size) { |
| 1008 | kfree(kaddrs); |
| 1009 | return -EINVAL; |
| 1010 | } |
| 1011 | addrcnt++; |
| 1012 | addr_buf += af->sockaddr_len; |
| 1013 | walk_size += af->sockaddr_len; |
| 1014 | } |
| 1015 | |
| 1016 | /* Do the work. */ |
| 1017 | switch (op) { |
| 1018 | case SCTP_BINDX_ADD_ADDR: |
| 1019 | err = sctp_bindx_add(sk, kaddrs, addrcnt); |
| 1020 | if (err) |
| 1021 | goto out; |
| 1022 | err = sctp_send_asconf_add_ip(sk, kaddrs, addrcnt); |
| 1023 | break; |
| 1024 | |
| 1025 | case SCTP_BINDX_REM_ADDR: |
| 1026 | err = sctp_bindx_rem(sk, kaddrs, addrcnt); |
| 1027 | if (err) |
| 1028 | goto out; |
| 1029 | err = sctp_send_asconf_del_ip(sk, kaddrs, addrcnt); |
| 1030 | break; |
| 1031 | |
| 1032 | default: |
| 1033 | err = -EINVAL; |
| 1034 | break; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 1035 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1036 | |
| 1037 | out: |
| 1038 | kfree(kaddrs); |
| 1039 | |
| 1040 | return err; |
| 1041 | } |
| 1042 | |
Frank Filz | 3f7a87d | 2005-06-20 13:14:57 -0700 | [diff] [blame] | 1043 | /* __sctp_connect(struct sock* sk, struct sockaddr *kaddrs, int addrs_size) |
| 1044 | * |
| 1045 | * Common routine for handling connect() and sctp_connectx(). |
| 1046 | * Connect will come in with just a single address. |
| 1047 | */ |
| 1048 | static int __sctp_connect(struct sock* sk, |
| 1049 | struct sockaddr *kaddrs, |
Vlad Yasevich | 88a0a94 | 2008-05-09 15:14:11 -0700 | [diff] [blame] | 1050 | int addrs_size, |
| 1051 | sctp_assoc_t *assoc_id) |
Frank Filz | 3f7a87d | 2005-06-20 13:14:57 -0700 | [diff] [blame] | 1052 | { |
| 1053 | struct sctp_sock *sp; |
| 1054 | struct sctp_endpoint *ep; |
| 1055 | struct sctp_association *asoc = NULL; |
| 1056 | struct sctp_association *asoc2; |
| 1057 | struct sctp_transport *transport; |
| 1058 | union sctp_addr to; |
| 1059 | struct sctp_af *af; |
| 1060 | sctp_scope_t scope; |
| 1061 | long timeo; |
| 1062 | int err = 0; |
| 1063 | int addrcnt = 0; |
| 1064 | int walk_size = 0; |
Vlad Yasevich | e4d1fea | 2007-08-01 10:56:43 -0400 | [diff] [blame] | 1065 | union sctp_addr *sa_addr = NULL; |
Frank Filz | 3f7a87d | 2005-06-20 13:14:57 -0700 | [diff] [blame] | 1066 | void *addr_buf; |
Vlad Yasevich | 16d00fb | 2007-05-04 13:34:09 -0700 | [diff] [blame] | 1067 | unsigned short port; |
Vlad Yasevich | f50f95c | 2007-07-03 12:47:40 -0400 | [diff] [blame] | 1068 | unsigned int f_flags = 0; |
Frank Filz | 3f7a87d | 2005-06-20 13:14:57 -0700 | [diff] [blame] | 1069 | |
| 1070 | sp = sctp_sk(sk); |
| 1071 | ep = sp->ep; |
| 1072 | |
| 1073 | /* connect() cannot be done on a socket that is already in ESTABLISHED |
| 1074 | * state - UDP-style peeled off socket or a TCP-style socket that |
| 1075 | * is already connected. |
| 1076 | * It cannot be done even on a TCP-style listening socket. |
| 1077 | */ |
| 1078 | if (sctp_sstate(sk, ESTABLISHED) || |
| 1079 | (sctp_style(sk, TCP) && sctp_sstate(sk, LISTENING))) { |
| 1080 | err = -EISCONN; |
| 1081 | goto out_free; |
| 1082 | } |
| 1083 | |
| 1084 | /* Walk through the addrs buffer and count the number of addresses. */ |
| 1085 | addr_buf = kaddrs; |
| 1086 | while (walk_size < addrs_size) { |
Dan Rosenberg | d7e0d19 | 2010-10-01 11:16:58 +0000 | [diff] [blame] | 1087 | if (walk_size + sizeof(sa_family_t) > addrs_size) { |
| 1088 | err = -EINVAL; |
| 1089 | goto out_free; |
| 1090 | } |
| 1091 | |
Joe Perches | ea11073 | 2011-06-13 16:21:26 +0000 | [diff] [blame] | 1092 | sa_addr = addr_buf; |
Al Viro | 4bdf4b5 | 2006-11-20 17:10:20 -0800 | [diff] [blame] | 1093 | af = sctp_get_af_specific(sa_addr->sa.sa_family); |
Frank Filz | 3f7a87d | 2005-06-20 13:14:57 -0700 | [diff] [blame] | 1094 | |
| 1095 | /* If the address family is not supported or if this address |
| 1096 | * causes the address buffer to overflow return EINVAL. |
| 1097 | */ |
| 1098 | if (!af || (walk_size + af->sockaddr_len) > addrs_size) { |
| 1099 | err = -EINVAL; |
| 1100 | goto out_free; |
| 1101 | } |
| 1102 | |
Dan Rosenberg | d7e0d19 | 2010-10-01 11:16:58 +0000 | [diff] [blame] | 1103 | port = ntohs(sa_addr->v4.sin_port); |
| 1104 | |
Vlad Yasevich | e4d1fea | 2007-08-01 10:56:43 -0400 | [diff] [blame] | 1105 | /* Save current address so we can work with it */ |
| 1106 | memcpy(&to, sa_addr, af->sockaddr_len); |
| 1107 | |
| 1108 | err = sctp_verify_addr(sk, &to, af->sockaddr_len); |
Frank Filz | 3f7a87d | 2005-06-20 13:14:57 -0700 | [diff] [blame] | 1109 | if (err) |
| 1110 | goto out_free; |
| 1111 | |
Vlad Yasevich | 16d00fb | 2007-05-04 13:34:09 -0700 | [diff] [blame] | 1112 | /* Make sure the destination port is correctly set |
| 1113 | * in all addresses. |
| 1114 | */ |
| 1115 | if (asoc && asoc->peer.port && asoc->peer.port != port) |
| 1116 | goto out_free; |
| 1117 | |
Frank Filz | 3f7a87d | 2005-06-20 13:14:57 -0700 | [diff] [blame] | 1118 | |
| 1119 | /* Check if there already is a matching association on the |
| 1120 | * endpoint (other than the one created here). |
| 1121 | */ |
Vlad Yasevich | e4d1fea | 2007-08-01 10:56:43 -0400 | [diff] [blame] | 1122 | asoc2 = sctp_endpoint_lookup_assoc(ep, &to, &transport); |
Frank Filz | 3f7a87d | 2005-06-20 13:14:57 -0700 | [diff] [blame] | 1123 | if (asoc2 && asoc2 != asoc) { |
| 1124 | if (asoc2->state >= SCTP_STATE_ESTABLISHED) |
| 1125 | err = -EISCONN; |
| 1126 | else |
| 1127 | err = -EALREADY; |
| 1128 | goto out_free; |
| 1129 | } |
| 1130 | |
| 1131 | /* If we could not find a matching association on the endpoint, |
| 1132 | * make sure that there is no peeled-off association matching |
| 1133 | * the peer address even on another socket. |
| 1134 | */ |
Vlad Yasevich | e4d1fea | 2007-08-01 10:56:43 -0400 | [diff] [blame] | 1135 | if (sctp_endpoint_is_peeled_off(ep, &to)) { |
Frank Filz | 3f7a87d | 2005-06-20 13:14:57 -0700 | [diff] [blame] | 1136 | err = -EADDRNOTAVAIL; |
| 1137 | goto out_free; |
| 1138 | } |
| 1139 | |
| 1140 | if (!asoc) { |
| 1141 | /* If a bind() or sctp_bindx() is not called prior to |
| 1142 | * an sctp_connectx() call, the system picks an |
| 1143 | * ephemeral port and will choose an address set |
| 1144 | * equivalent to binding with a wildcard address. |
| 1145 | */ |
| 1146 | if (!ep->base.bind_addr.port) { |
| 1147 | if (sctp_autobind(sk)) { |
| 1148 | err = -EAGAIN; |
| 1149 | goto out_free; |
| 1150 | } |
Ivan Skytte Jorgensen | 64a0c1c | 2005-10-28 15:39:02 -0700 | [diff] [blame] | 1151 | } else { |
| 1152 | /* |
YOSHIFUJI Hideaki | d808ad9 | 2007-02-09 23:25:18 +0900 | [diff] [blame] | 1153 | * If an unprivileged user inherits a 1-many |
| 1154 | * style socket with open associations on a |
| 1155 | * privileged port, it MAY be permitted to |
| 1156 | * accept new associations, but it SHOULD NOT |
Ivan Skytte Jorgensen | 64a0c1c | 2005-10-28 15:39:02 -0700 | [diff] [blame] | 1157 | * be permitted to open new associations. |
| 1158 | */ |
| 1159 | if (ep->base.bind_addr.port < PROT_SOCK && |
| 1160 | !capable(CAP_NET_BIND_SERVICE)) { |
| 1161 | err = -EACCES; |
| 1162 | goto out_free; |
| 1163 | } |
Frank Filz | 3f7a87d | 2005-06-20 13:14:57 -0700 | [diff] [blame] | 1164 | } |
| 1165 | |
Vlad Yasevich | e4d1fea | 2007-08-01 10:56:43 -0400 | [diff] [blame] | 1166 | scope = sctp_scope(&to); |
Frank Filz | 3f7a87d | 2005-06-20 13:14:57 -0700 | [diff] [blame] | 1167 | asoc = sctp_association_new(ep, sk, scope, GFP_KERNEL); |
| 1168 | if (!asoc) { |
| 1169 | err = -ENOMEM; |
| 1170 | goto out_free; |
| 1171 | } |
Vlad Yasevich | 409b95a | 2009-11-10 08:57:34 +0000 | [diff] [blame] | 1172 | |
| 1173 | err = sctp_assoc_set_bind_addr_from_ep(asoc, scope, |
| 1174 | GFP_KERNEL); |
| 1175 | if (err < 0) { |
| 1176 | goto out_free; |
| 1177 | } |
| 1178 | |
Frank Filz | 3f7a87d | 2005-06-20 13:14:57 -0700 | [diff] [blame] | 1179 | } |
| 1180 | |
| 1181 | /* Prime the peer's transport structures. */ |
Vlad Yasevich | e4d1fea | 2007-08-01 10:56:43 -0400 | [diff] [blame] | 1182 | transport = sctp_assoc_add_peer(asoc, &to, GFP_KERNEL, |
Frank Filz | 3f7a87d | 2005-06-20 13:14:57 -0700 | [diff] [blame] | 1183 | SCTP_UNKNOWN); |
| 1184 | if (!transport) { |
| 1185 | err = -ENOMEM; |
| 1186 | goto out_free; |
| 1187 | } |
| 1188 | |
| 1189 | addrcnt++; |
| 1190 | addr_buf += af->sockaddr_len; |
| 1191 | walk_size += af->sockaddr_len; |
| 1192 | } |
| 1193 | |
Vlad Yasevich | c6ba68a | 2009-06-01 12:41:15 -0400 | [diff] [blame] | 1194 | /* In case the user of sctp_connectx() wants an association |
| 1195 | * id back, assign one now. |
| 1196 | */ |
| 1197 | if (assoc_id) { |
| 1198 | err = sctp_assoc_set_id(asoc, GFP_KERNEL); |
| 1199 | if (err < 0) |
| 1200 | goto out_free; |
| 1201 | } |
| 1202 | |
Frank Filz | 3f7a87d | 2005-06-20 13:14:57 -0700 | [diff] [blame] | 1203 | err = sctp_primitive_ASSOCIATE(asoc, NULL); |
| 1204 | if (err < 0) { |
| 1205 | goto out_free; |
| 1206 | } |
| 1207 | |
| 1208 | /* Initialize sk's dport and daddr for getpeername() */ |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 1209 | inet_sk(sk)->inet_dport = htons(asoc->peer.port); |
Vlad Yasevich | e4d1fea | 2007-08-01 10:56:43 -0400 | [diff] [blame] | 1210 | af = sctp_get_af_specific(sa_addr->sa.sa_family); |
| 1211 | af->to_sk_daddr(sa_addr, sk); |
Sridhar Samudrala | 8de8c87 | 2006-05-19 10:58:12 -0700 | [diff] [blame] | 1212 | sk->sk_err = 0; |
Frank Filz | 3f7a87d | 2005-06-20 13:14:57 -0700 | [diff] [blame] | 1213 | |
Vlad Yasevich | f50f95c | 2007-07-03 12:47:40 -0400 | [diff] [blame] | 1214 | /* in-kernel sockets don't generally have a file allocated to them |
| 1215 | * if all they do is call sock_create_kern(). |
| 1216 | */ |
| 1217 | if (sk->sk_socket->file) |
| 1218 | f_flags = sk->sk_socket->file->f_flags; |
| 1219 | |
| 1220 | timeo = sock_sndtimeo(sk, f_flags & O_NONBLOCK); |
| 1221 | |
Frank Filz | 3f7a87d | 2005-06-20 13:14:57 -0700 | [diff] [blame] | 1222 | err = sctp_wait_for_connect(asoc, &timeo); |
Vlad Yasevich | c6ba68a | 2009-06-01 12:41:15 -0400 | [diff] [blame] | 1223 | if ((err == 0 || err == -EINPROGRESS) && assoc_id) |
Vlad Yasevich | 88a0a94 | 2008-05-09 15:14:11 -0700 | [diff] [blame] | 1224 | *assoc_id = asoc->assoc_id; |
Frank Filz | 3f7a87d | 2005-06-20 13:14:57 -0700 | [diff] [blame] | 1225 | |
| 1226 | /* Don't free association on exit. */ |
| 1227 | asoc = NULL; |
| 1228 | |
| 1229 | out_free: |
| 1230 | |
| 1231 | SCTP_DEBUG_PRINTK("About to exit __sctp_connect() free asoc: %p" |
YOSHIFUJI Hideaki | d808ad9 | 2007-02-09 23:25:18 +0900 | [diff] [blame] | 1232 | " kaddrs: %p err: %d\n", |
| 1233 | asoc, kaddrs, err); |
Frank Filz | 3f7a87d | 2005-06-20 13:14:57 -0700 | [diff] [blame] | 1234 | if (asoc) |
| 1235 | sctp_association_free(asoc); |
| 1236 | return err; |
| 1237 | } |
| 1238 | |
| 1239 | /* Helper for tunneling sctp_connectx() requests through sctp_setsockopt() |
| 1240 | * |
| 1241 | * API 8.9 |
Vlad Yasevich | 88a0a94 | 2008-05-09 15:14:11 -0700 | [diff] [blame] | 1242 | * int sctp_connectx(int sd, struct sockaddr *addrs, int addrcnt, |
| 1243 | * sctp_assoc_t *asoc); |
Frank Filz | 3f7a87d | 2005-06-20 13:14:57 -0700 | [diff] [blame] | 1244 | * |
| 1245 | * If sd is an IPv4 socket, the addresses passed must be IPv4 addresses. |
| 1246 | * If the sd is an IPv6 socket, the addresses passed can either be IPv4 |
| 1247 | * or IPv6 addresses. |
| 1248 | * |
| 1249 | * A single address may be specified as INADDR_ANY or IN6ADDR_ANY, see |
| 1250 | * Section 3.1.2 for this usage. |
| 1251 | * |
| 1252 | * addrs is a pointer to an array of one or more socket addresses. Each |
| 1253 | * address is contained in its appropriate structure (i.e. struct |
| 1254 | * sockaddr_in or struct sockaddr_in6) the family of the address type |
| 1255 | * must be used to distengish the address length (note that this |
| 1256 | * representation is termed a "packed array" of addresses). The caller |
| 1257 | * specifies the number of addresses in the array with addrcnt. |
| 1258 | * |
Vlad Yasevich | 88a0a94 | 2008-05-09 15:14:11 -0700 | [diff] [blame] | 1259 | * On success, sctp_connectx() returns 0. It also sets the assoc_id to |
| 1260 | * the association id of the new association. On failure, sctp_connectx() |
| 1261 | * returns -1, and sets errno to the appropriate error code. The assoc_id |
| 1262 | * is not touched by the kernel. |
Frank Filz | 3f7a87d | 2005-06-20 13:14:57 -0700 | [diff] [blame] | 1263 | * |
| 1264 | * For SCTP, the port given in each socket address must be the same, or |
| 1265 | * sctp_connectx() will fail, setting errno to EINVAL. |
| 1266 | * |
| 1267 | * An application can use sctp_connectx to initiate an association with |
| 1268 | * an endpoint that is multi-homed. Much like sctp_bindx() this call |
| 1269 | * allows a caller to specify multiple addresses at which a peer can be |
| 1270 | * reached. The way the SCTP stack uses the list of addresses to set up |
Lucas De Marchi | 25985ed | 2011-03-30 22:57:33 -0300 | [diff] [blame] | 1271 | * the association is implementation dependent. This function only |
Frank Filz | 3f7a87d | 2005-06-20 13:14:57 -0700 | [diff] [blame] | 1272 | * specifies that the stack will try to make use of all the addresses in |
| 1273 | * the list when needed. |
| 1274 | * |
| 1275 | * Note that the list of addresses passed in is only used for setting up |
| 1276 | * the association. It does not necessarily equal the set of addresses |
| 1277 | * the peer uses for the resulting association. If the caller wants to |
| 1278 | * find out the set of peer addresses, it must use sctp_getpaddrs() to |
| 1279 | * retrieve them after the association has been set up. |
| 1280 | * |
| 1281 | * Basically do nothing but copying the addresses from user to kernel |
| 1282 | * land and invoking either sctp_connectx(). This is used for tunneling |
| 1283 | * the sctp_connectx() request through sctp_setsockopt() from userspace. |
| 1284 | * |
| 1285 | * We don't use copy_from_user() for optimization: we first do the |
| 1286 | * sanity checks (buffer size -fast- and access check-healthy |
| 1287 | * pointer); if all of those succeed, then we can alloc the memory |
| 1288 | * (expensive operation) needed to copy the data to kernel. Then we do |
| 1289 | * the copying without checking the user space area |
| 1290 | * (__copy_from_user()). |
| 1291 | * |
| 1292 | * On exit there is no need to do sockfd_put(), sys_setsockopt() does |
| 1293 | * it. |
| 1294 | * |
| 1295 | * sk The sk of the socket |
| 1296 | * addrs The pointer to the addresses in user land |
| 1297 | * addrssize Size of the addrs buffer |
| 1298 | * |
Vlad Yasevich | 88a0a94 | 2008-05-09 15:14:11 -0700 | [diff] [blame] | 1299 | * Returns >=0 if ok, <0 errno code on error. |
Frank Filz | 3f7a87d | 2005-06-20 13:14:57 -0700 | [diff] [blame] | 1300 | */ |
Vlad Yasevich | 88a0a94 | 2008-05-09 15:14:11 -0700 | [diff] [blame] | 1301 | SCTP_STATIC int __sctp_setsockopt_connectx(struct sock* sk, |
Frank Filz | 3f7a87d | 2005-06-20 13:14:57 -0700 | [diff] [blame] | 1302 | struct sockaddr __user *addrs, |
Vlad Yasevich | 88a0a94 | 2008-05-09 15:14:11 -0700 | [diff] [blame] | 1303 | int addrs_size, |
| 1304 | sctp_assoc_t *assoc_id) |
Frank Filz | 3f7a87d | 2005-06-20 13:14:57 -0700 | [diff] [blame] | 1305 | { |
| 1306 | int err = 0; |
| 1307 | struct sockaddr *kaddrs; |
| 1308 | |
| 1309 | SCTP_DEBUG_PRINTK("%s - sk %p addrs %p addrs_size %d\n", |
Harvey Harrison | 0dc4787 | 2008-03-05 20:47:47 -0800 | [diff] [blame] | 1310 | __func__, sk, addrs, addrs_size); |
Frank Filz | 3f7a87d | 2005-06-20 13:14:57 -0700 | [diff] [blame] | 1311 | |
| 1312 | if (unlikely(addrs_size <= 0)) |
| 1313 | return -EINVAL; |
| 1314 | |
| 1315 | /* Check the user passed a healthy pointer. */ |
| 1316 | if (unlikely(!access_ok(VERIFY_READ, addrs, addrs_size))) |
| 1317 | return -EFAULT; |
| 1318 | |
| 1319 | /* Alloc space for the address array in kernel memory. */ |
Kris Katterjohn | 8b3a700 | 2006-01-11 15:56:43 -0800 | [diff] [blame] | 1320 | kaddrs = kmalloc(addrs_size, GFP_KERNEL); |
Frank Filz | 3f7a87d | 2005-06-20 13:14:57 -0700 | [diff] [blame] | 1321 | if (unlikely(!kaddrs)) |
| 1322 | return -ENOMEM; |
| 1323 | |
| 1324 | if (__copy_from_user(kaddrs, addrs, addrs_size)) { |
| 1325 | err = -EFAULT; |
| 1326 | } else { |
Vlad Yasevich | 88a0a94 | 2008-05-09 15:14:11 -0700 | [diff] [blame] | 1327 | err = __sctp_connect(sk, kaddrs, addrs_size, assoc_id); |
Frank Filz | 3f7a87d | 2005-06-20 13:14:57 -0700 | [diff] [blame] | 1328 | } |
| 1329 | |
| 1330 | kfree(kaddrs); |
Vlad Yasevich | 88a0a94 | 2008-05-09 15:14:11 -0700 | [diff] [blame] | 1331 | |
Frank Filz | 3f7a87d | 2005-06-20 13:14:57 -0700 | [diff] [blame] | 1332 | return err; |
| 1333 | } |
| 1334 | |
Vlad Yasevich | 88a0a94 | 2008-05-09 15:14:11 -0700 | [diff] [blame] | 1335 | /* |
| 1336 | * This is an older interface. It's kept for backward compatibility |
| 1337 | * to the option that doesn't provide association id. |
| 1338 | */ |
| 1339 | SCTP_STATIC int sctp_setsockopt_connectx_old(struct sock* sk, |
| 1340 | struct sockaddr __user *addrs, |
| 1341 | int addrs_size) |
| 1342 | { |
| 1343 | return __sctp_setsockopt_connectx(sk, addrs, addrs_size, NULL); |
| 1344 | } |
| 1345 | |
| 1346 | /* |
| 1347 | * New interface for the API. The since the API is done with a socket |
| 1348 | * option, to make it simple we feed back the association id is as a return |
| 1349 | * indication to the call. Error is always negative and association id is |
| 1350 | * always positive. |
| 1351 | */ |
| 1352 | SCTP_STATIC int sctp_setsockopt_connectx(struct sock* sk, |
| 1353 | struct sockaddr __user *addrs, |
| 1354 | int addrs_size) |
| 1355 | { |
| 1356 | sctp_assoc_t assoc_id = 0; |
| 1357 | int err = 0; |
| 1358 | |
| 1359 | err = __sctp_setsockopt_connectx(sk, addrs, addrs_size, &assoc_id); |
| 1360 | |
| 1361 | if (err) |
| 1362 | return err; |
| 1363 | else |
| 1364 | return assoc_id; |
| 1365 | } |
| 1366 | |
Vlad Yasevich | c6ba68a | 2009-06-01 12:41:15 -0400 | [diff] [blame] | 1367 | /* |
Vlad Yasevich | f9c6781 | 2009-11-11 08:19:24 +0000 | [diff] [blame] | 1368 | * New (hopefully final) interface for the API. |
| 1369 | * We use the sctp_getaddrs_old structure so that use-space library |
| 1370 | * can avoid any unnecessary allocations. The only defferent part |
| 1371 | * is that we store the actual length of the address buffer into the |
| 1372 | * addrs_num structure member. That way we can re-use the existing |
| 1373 | * code. |
Vlad Yasevich | c6ba68a | 2009-06-01 12:41:15 -0400 | [diff] [blame] | 1374 | */ |
| 1375 | SCTP_STATIC int sctp_getsockopt_connectx3(struct sock* sk, int len, |
| 1376 | char __user *optval, |
| 1377 | int __user *optlen) |
| 1378 | { |
Vlad Yasevich | f9c6781 | 2009-11-11 08:19:24 +0000 | [diff] [blame] | 1379 | struct sctp_getaddrs_old param; |
Vlad Yasevich | c6ba68a | 2009-06-01 12:41:15 -0400 | [diff] [blame] | 1380 | sctp_assoc_t assoc_id = 0; |
| 1381 | int err = 0; |
| 1382 | |
Vlad Yasevich | f9c6781 | 2009-11-11 08:19:24 +0000 | [diff] [blame] | 1383 | if (len < sizeof(param)) |
Vlad Yasevich | c6ba68a | 2009-06-01 12:41:15 -0400 | [diff] [blame] | 1384 | return -EINVAL; |
| 1385 | |
Vlad Yasevich | f9c6781 | 2009-11-11 08:19:24 +0000 | [diff] [blame] | 1386 | if (copy_from_user(¶m, optval, sizeof(param))) |
| 1387 | return -EFAULT; |
| 1388 | |
Vlad Yasevich | c6ba68a | 2009-06-01 12:41:15 -0400 | [diff] [blame] | 1389 | err = __sctp_setsockopt_connectx(sk, |
Vlad Yasevich | f9c6781 | 2009-11-11 08:19:24 +0000 | [diff] [blame] | 1390 | (struct sockaddr __user *)param.addrs, |
| 1391 | param.addr_num, &assoc_id); |
Vlad Yasevich | c6ba68a | 2009-06-01 12:41:15 -0400 | [diff] [blame] | 1392 | |
| 1393 | if (err == 0 || err == -EINPROGRESS) { |
| 1394 | if (copy_to_user(optval, &assoc_id, sizeof(assoc_id))) |
| 1395 | return -EFAULT; |
| 1396 | if (put_user(sizeof(assoc_id), optlen)) |
| 1397 | return -EFAULT; |
| 1398 | } |
| 1399 | |
| 1400 | return err; |
| 1401 | } |
| 1402 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1403 | /* API 3.1.4 close() - UDP Style Syntax |
| 1404 | * Applications use close() to perform graceful shutdown (as described in |
| 1405 | * Section 10.1 of [SCTP]) on ALL the associations currently represented |
| 1406 | * by a UDP-style socket. |
| 1407 | * |
| 1408 | * The syntax is |
| 1409 | * |
| 1410 | * ret = close(int sd); |
| 1411 | * |
| 1412 | * sd - the socket descriptor of the associations to be closed. |
| 1413 | * |
| 1414 | * To gracefully shutdown a specific association represented by the |
| 1415 | * UDP-style socket, an application should use the sendmsg() call, |
| 1416 | * passing no user data, but including the appropriate flag in the |
| 1417 | * ancillary data (see Section xxxx). |
| 1418 | * |
| 1419 | * If sd in the close() call is a branched-off socket representing only |
| 1420 | * one association, the shutdown is performed on that association only. |
| 1421 | * |
| 1422 | * 4.1.6 close() - TCP Style Syntax |
| 1423 | * |
| 1424 | * Applications use close() to gracefully close down an association. |
| 1425 | * |
| 1426 | * The syntax is: |
| 1427 | * |
| 1428 | * int close(int sd); |
| 1429 | * |
| 1430 | * sd - the socket descriptor of the association to be closed. |
| 1431 | * |
| 1432 | * After an application calls close() on a socket descriptor, no further |
| 1433 | * socket operations will succeed on that descriptor. |
| 1434 | * |
| 1435 | * API 7.1.4 SO_LINGER |
| 1436 | * |
| 1437 | * An application using the TCP-style socket can use this option to |
| 1438 | * perform the SCTP ABORT primitive. The linger option structure is: |
| 1439 | * |
| 1440 | * struct linger { |
| 1441 | * int l_onoff; // option on/off |
| 1442 | * int l_linger; // linger time |
| 1443 | * }; |
| 1444 | * |
| 1445 | * To enable the option, set l_onoff to 1. If the l_linger value is set |
| 1446 | * to 0, calling close() is the same as the ABORT primitive. If the |
| 1447 | * value is set to a negative value, the setsockopt() call will return |
| 1448 | * an error. If the value is set to a positive value linger_time, the |
| 1449 | * close() can be blocked for at most linger_time ms. If the graceful |
| 1450 | * shutdown phase does not finish during this period, close() will |
| 1451 | * return but the graceful shutdown phase continues in the system. |
| 1452 | */ |
| 1453 | SCTP_STATIC void sctp_close(struct sock *sk, long timeout) |
| 1454 | { |
| 1455 | struct sctp_endpoint *ep; |
| 1456 | struct sctp_association *asoc; |
| 1457 | struct list_head *pos, *temp; |
Thomas Graf | cd4fcc7 | 2011-07-08 04:37:46 +0000 | [diff] [blame] | 1458 | unsigned int data_was_unread; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1459 | |
| 1460 | SCTP_DEBUG_PRINTK("sctp_close(sk: 0x%p, timeout:%ld)\n", sk, timeout); |
| 1461 | |
| 1462 | sctp_lock_sock(sk); |
| 1463 | sk->sk_shutdown = SHUTDOWN_MASK; |
Vlad Yasevich | bec9640 | 2009-07-30 18:08:28 -0400 | [diff] [blame] | 1464 | sk->sk_state = SCTP_SS_CLOSING; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1465 | |
| 1466 | ep = sctp_sk(sk)->ep; |
| 1467 | |
Thomas Graf | cd4fcc7 | 2011-07-08 04:37:46 +0000 | [diff] [blame] | 1468 | /* Clean up any skbs sitting on the receive queue. */ |
| 1469 | data_was_unread = sctp_queue_purge_ulpevents(&sk->sk_receive_queue); |
| 1470 | data_was_unread += sctp_queue_purge_ulpevents(&sctp_sk(sk)->pd_lobby); |
| 1471 | |
Vladislav Yasevich | 61c9fed | 2006-05-19 11:01:18 -0700 | [diff] [blame] | 1472 | /* Walk all associations on an endpoint. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1473 | list_for_each_safe(pos, temp, &ep->asocs) { |
| 1474 | asoc = list_entry(pos, struct sctp_association, asocs); |
| 1475 | |
| 1476 | if (sctp_style(sk, TCP)) { |
| 1477 | /* A closed association can still be in the list if |
| 1478 | * it belongs to a TCP-style listening socket that is |
| 1479 | * not yet accepted. If so, free it. If not, send an |
| 1480 | * ABORT or SHUTDOWN based on the linger options. |
| 1481 | */ |
| 1482 | if (sctp_state(asoc, CLOSED)) { |
| 1483 | sctp_unhash_established(asoc); |
| 1484 | sctp_association_free(asoc); |
Vladislav Yasevich | b89498a | 2006-05-19 14:32:06 -0700 | [diff] [blame] | 1485 | continue; |
| 1486 | } |
| 1487 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1488 | |
Thomas Graf | cd4fcc7 | 2011-07-08 04:37:46 +0000 | [diff] [blame] | 1489 | if (data_was_unread || !skb_queue_empty(&asoc->ulpq.lobby) || |
| 1490 | !skb_queue_empty(&asoc->ulpq.reasm) || |
| 1491 | (sock_flag(sk, SOCK_LINGER) && !sk->sk_lingertime)) { |
Sridhar Samudrala | b9ac867 | 2006-08-28 13:53:01 -0700 | [diff] [blame] | 1492 | struct sctp_chunk *chunk; |
| 1493 | |
| 1494 | chunk = sctp_make_abort_user(asoc, NULL, 0); |
| 1495 | if (chunk) |
| 1496 | sctp_primitive_ABORT(asoc, chunk); |
| 1497 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1498 | sctp_primitive_SHUTDOWN(asoc, NULL); |
| 1499 | } |
| 1500 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1501 | /* On a TCP-style socket, block for at most linger_time if set. */ |
| 1502 | if (sctp_style(sk, TCP) && timeout) |
| 1503 | sctp_wait_for_close(sk, timeout); |
| 1504 | |
| 1505 | /* This will run the backlog queue. */ |
| 1506 | sctp_release_sock(sk); |
| 1507 | |
| 1508 | /* Supposedly, no process has access to the socket, but |
| 1509 | * the net layers still may. |
| 1510 | */ |
| 1511 | sctp_local_bh_disable(); |
| 1512 | sctp_bh_lock_sock(sk); |
| 1513 | |
| 1514 | /* Hold the sock, since sk_common_release() will put sock_put() |
| 1515 | * and we have just a little more cleanup. |
| 1516 | */ |
| 1517 | sock_hold(sk); |
| 1518 | sk_common_release(sk); |
| 1519 | |
| 1520 | sctp_bh_unlock_sock(sk); |
| 1521 | sctp_local_bh_enable(); |
| 1522 | |
| 1523 | sock_put(sk); |
| 1524 | |
| 1525 | SCTP_DBG_OBJCNT_DEC(sock); |
| 1526 | } |
| 1527 | |
| 1528 | /* Handle EPIPE error. */ |
| 1529 | static int sctp_error(struct sock *sk, int flags, int err) |
| 1530 | { |
| 1531 | if (err == -EPIPE) |
| 1532 | err = sock_error(sk) ? : -EPIPE; |
| 1533 | if (err == -EPIPE && !(flags & MSG_NOSIGNAL)) |
| 1534 | send_sig(SIGPIPE, current, 0); |
| 1535 | return err; |
| 1536 | } |
| 1537 | |
| 1538 | /* API 3.1.3 sendmsg() - UDP Style Syntax |
| 1539 | * |
| 1540 | * An application uses sendmsg() and recvmsg() calls to transmit data to |
| 1541 | * and receive data from its peer. |
| 1542 | * |
| 1543 | * ssize_t sendmsg(int socket, const struct msghdr *message, |
| 1544 | * int flags); |
| 1545 | * |
| 1546 | * socket - the socket descriptor of the endpoint. |
| 1547 | * message - pointer to the msghdr structure which contains a single |
| 1548 | * user message and possibly some ancillary data. |
| 1549 | * |
| 1550 | * See Section 5 for complete description of the data |
| 1551 | * structures. |
| 1552 | * |
| 1553 | * flags - flags sent or received with the user message, see Section |
| 1554 | * 5 for complete description of the flags. |
| 1555 | * |
| 1556 | * Note: This function could use a rewrite especially when explicit |
| 1557 | * connect support comes in. |
| 1558 | */ |
| 1559 | /* BUG: We do not implement the equivalent of sk_stream_wait_memory(). */ |
| 1560 | |
| 1561 | SCTP_STATIC int sctp_msghdr_parse(const struct msghdr *, sctp_cmsgs_t *); |
| 1562 | |
| 1563 | SCTP_STATIC int sctp_sendmsg(struct kiocb *iocb, struct sock *sk, |
| 1564 | struct msghdr *msg, size_t msg_len) |
| 1565 | { |
| 1566 | struct sctp_sock *sp; |
| 1567 | struct sctp_endpoint *ep; |
| 1568 | struct sctp_association *new_asoc=NULL, *asoc=NULL; |
| 1569 | struct sctp_transport *transport, *chunk_tp; |
| 1570 | struct sctp_chunk *chunk; |
Al Viro | dce116a | 2006-11-20 17:25:15 -0800 | [diff] [blame] | 1571 | union sctp_addr to; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1572 | struct sockaddr *msg_name = NULL; |
Joe Perches | 517aa0b | 2011-05-12 11:27:20 +0000 | [diff] [blame] | 1573 | struct sctp_sndrcvinfo default_sinfo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1574 | struct sctp_sndrcvinfo *sinfo; |
| 1575 | struct sctp_initmsg *sinit; |
| 1576 | sctp_assoc_t associd = 0; |
| 1577 | sctp_cmsgs_t cmsgs = { NULL }; |
| 1578 | int err; |
| 1579 | sctp_scope_t scope; |
| 1580 | long timeo; |
| 1581 | __u16 sinfo_flags = 0; |
| 1582 | struct sctp_datamsg *datamsg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1583 | int msg_flags = msg->msg_flags; |
| 1584 | |
| 1585 | SCTP_DEBUG_PRINTK("sctp_sendmsg(sk: %p, msg: %p, msg_len: %zu)\n", |
| 1586 | sk, msg, msg_len); |
| 1587 | |
| 1588 | err = 0; |
| 1589 | sp = sctp_sk(sk); |
| 1590 | ep = sp->ep; |
| 1591 | |
Frank Filz | 3f7a87d | 2005-06-20 13:14:57 -0700 | [diff] [blame] | 1592 | SCTP_DEBUG_PRINTK("Using endpoint: %p.\n", ep); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1593 | |
| 1594 | /* We cannot send a message over a TCP-style listening socket. */ |
| 1595 | if (sctp_style(sk, TCP) && sctp_sstate(sk, LISTENING)) { |
| 1596 | err = -EPIPE; |
| 1597 | goto out_nounlock; |
| 1598 | } |
| 1599 | |
| 1600 | /* Parse out the SCTP CMSGs. */ |
| 1601 | err = sctp_msghdr_parse(msg, &cmsgs); |
| 1602 | |
| 1603 | if (err) { |
| 1604 | SCTP_DEBUG_PRINTK("msghdr parse err = %x\n", err); |
| 1605 | goto out_nounlock; |
| 1606 | } |
| 1607 | |
| 1608 | /* Fetch the destination address for this packet. This |
| 1609 | * address only selects the association--it is not necessarily |
| 1610 | * the address we will send to. |
| 1611 | * For a peeled-off socket, msg_name is ignored. |
| 1612 | */ |
| 1613 | if (!sctp_style(sk, UDP_HIGH_BANDWIDTH) && msg->msg_name) { |
| 1614 | int msg_namelen = msg->msg_namelen; |
| 1615 | |
| 1616 | err = sctp_verify_addr(sk, (union sctp_addr *)msg->msg_name, |
| 1617 | msg_namelen); |
| 1618 | if (err) |
| 1619 | return err; |
| 1620 | |
| 1621 | if (msg_namelen > sizeof(to)) |
| 1622 | msg_namelen = sizeof(to); |
| 1623 | memcpy(&to, msg->msg_name, msg_namelen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1624 | msg_name = msg->msg_name; |
| 1625 | } |
| 1626 | |
| 1627 | sinfo = cmsgs.info; |
| 1628 | sinit = cmsgs.init; |
| 1629 | |
| 1630 | /* Did the user specify SNDRCVINFO? */ |
| 1631 | if (sinfo) { |
| 1632 | sinfo_flags = sinfo->sinfo_flags; |
| 1633 | associd = sinfo->sinfo_assoc_id; |
| 1634 | } |
| 1635 | |
| 1636 | SCTP_DEBUG_PRINTK("msg_len: %zu, sinfo_flags: 0x%x\n", |
| 1637 | msg_len, sinfo_flags); |
| 1638 | |
Ivan Skytte Jorgensen | eaa5c54 | 2005-10-28 15:10:00 -0700 | [diff] [blame] | 1639 | /* SCTP_EOF or SCTP_ABORT cannot be set on a TCP-style socket. */ |
| 1640 | if (sctp_style(sk, TCP) && (sinfo_flags & (SCTP_EOF | SCTP_ABORT))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1641 | err = -EINVAL; |
| 1642 | goto out_nounlock; |
| 1643 | } |
| 1644 | |
Ivan Skytte Jorgensen | eaa5c54 | 2005-10-28 15:10:00 -0700 | [diff] [blame] | 1645 | /* If SCTP_EOF is set, no data can be sent. Disallow sending zero |
| 1646 | * length messages when SCTP_EOF|SCTP_ABORT is not set. |
| 1647 | * If SCTP_ABORT is set, the message length could be non zero with |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1648 | * the msg_iov set to the user abort reason. |
YOSHIFUJI Hideaki | d808ad9 | 2007-02-09 23:25:18 +0900 | [diff] [blame] | 1649 | */ |
Ivan Skytte Jorgensen | eaa5c54 | 2005-10-28 15:10:00 -0700 | [diff] [blame] | 1650 | if (((sinfo_flags & SCTP_EOF) && (msg_len > 0)) || |
| 1651 | (!(sinfo_flags & (SCTP_EOF|SCTP_ABORT)) && (msg_len == 0))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1652 | err = -EINVAL; |
| 1653 | goto out_nounlock; |
| 1654 | } |
| 1655 | |
Ivan Skytte Jorgensen | eaa5c54 | 2005-10-28 15:10:00 -0700 | [diff] [blame] | 1656 | /* If SCTP_ADDR_OVER is set, there must be an address |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1657 | * specified in msg_name. |
| 1658 | */ |
Ivan Skytte Jorgensen | eaa5c54 | 2005-10-28 15:10:00 -0700 | [diff] [blame] | 1659 | if ((sinfo_flags & SCTP_ADDR_OVER) && (!msg->msg_name)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1660 | err = -EINVAL; |
| 1661 | goto out_nounlock; |
| 1662 | } |
| 1663 | |
| 1664 | transport = NULL; |
| 1665 | |
| 1666 | SCTP_DEBUG_PRINTK("About to look up association.\n"); |
| 1667 | |
| 1668 | sctp_lock_sock(sk); |
| 1669 | |
| 1670 | /* If a msg_name has been specified, assume this is to be used. */ |
| 1671 | if (msg_name) { |
| 1672 | /* Look for a matching association on the endpoint. */ |
Al Viro | dce116a | 2006-11-20 17:25:15 -0800 | [diff] [blame] | 1673 | asoc = sctp_endpoint_lookup_assoc(ep, &to, &transport); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1674 | if (!asoc) { |
| 1675 | /* If we could not find a matching association on the |
| 1676 | * endpoint, make sure that it is not a TCP-style |
| 1677 | * socket that already has an association or there is |
| 1678 | * no peeled-off association on another socket. |
| 1679 | */ |
| 1680 | if ((sctp_style(sk, TCP) && |
| 1681 | sctp_sstate(sk, ESTABLISHED)) || |
Al Viro | dce116a | 2006-11-20 17:25:15 -0800 | [diff] [blame] | 1682 | sctp_endpoint_is_peeled_off(ep, &to)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1683 | err = -EADDRNOTAVAIL; |
| 1684 | goto out_unlock; |
| 1685 | } |
| 1686 | } |
| 1687 | } else { |
| 1688 | asoc = sctp_id2assoc(sk, associd); |
| 1689 | if (!asoc) { |
| 1690 | err = -EPIPE; |
| 1691 | goto out_unlock; |
| 1692 | } |
| 1693 | } |
| 1694 | |
| 1695 | if (asoc) { |
| 1696 | SCTP_DEBUG_PRINTK("Just looked up association: %p.\n", asoc); |
| 1697 | |
| 1698 | /* We cannot send a message on a TCP-style SCTP_SS_ESTABLISHED |
| 1699 | * socket that has an association in CLOSED state. This can |
| 1700 | * happen when an accepted socket has an association that is |
| 1701 | * already CLOSED. |
| 1702 | */ |
| 1703 | if (sctp_state(asoc, CLOSED) && sctp_style(sk, TCP)) { |
| 1704 | err = -EPIPE; |
| 1705 | goto out_unlock; |
| 1706 | } |
| 1707 | |
Ivan Skytte Jorgensen | eaa5c54 | 2005-10-28 15:10:00 -0700 | [diff] [blame] | 1708 | if (sinfo_flags & SCTP_EOF) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1709 | SCTP_DEBUG_PRINTK("Shutting down association: %p\n", |
| 1710 | asoc); |
| 1711 | sctp_primitive_SHUTDOWN(asoc, NULL); |
| 1712 | err = 0; |
| 1713 | goto out_unlock; |
| 1714 | } |
Ivan Skytte Jorgensen | eaa5c54 | 2005-10-28 15:10:00 -0700 | [diff] [blame] | 1715 | if (sinfo_flags & SCTP_ABORT) { |
Sridhar Samudrala | c164a9b | 2006-08-22 11:50:39 -0700 | [diff] [blame] | 1716 | |
| 1717 | chunk = sctp_make_abort_user(asoc, msg, msg_len); |
| 1718 | if (!chunk) { |
| 1719 | err = -ENOMEM; |
| 1720 | goto out_unlock; |
| 1721 | } |
| 1722 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1723 | SCTP_DEBUG_PRINTK("Aborting association: %p\n", asoc); |
Sridhar Samudrala | c164a9b | 2006-08-22 11:50:39 -0700 | [diff] [blame] | 1724 | sctp_primitive_ABORT(asoc, chunk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1725 | err = 0; |
| 1726 | goto out_unlock; |
| 1727 | } |
| 1728 | } |
| 1729 | |
| 1730 | /* Do we need to create the association? */ |
| 1731 | if (!asoc) { |
| 1732 | SCTP_DEBUG_PRINTK("There is no association yet.\n"); |
| 1733 | |
Ivan Skytte Jorgensen | eaa5c54 | 2005-10-28 15:10:00 -0700 | [diff] [blame] | 1734 | if (sinfo_flags & (SCTP_EOF | SCTP_ABORT)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1735 | err = -EINVAL; |
| 1736 | goto out_unlock; |
| 1737 | } |
| 1738 | |
| 1739 | /* Check for invalid stream against the stream counts, |
| 1740 | * either the default or the user specified stream counts. |
| 1741 | */ |
| 1742 | if (sinfo) { |
| 1743 | if (!sinit || (sinit && !sinit->sinit_num_ostreams)) { |
| 1744 | /* Check against the defaults. */ |
| 1745 | if (sinfo->sinfo_stream >= |
| 1746 | sp->initmsg.sinit_num_ostreams) { |
| 1747 | err = -EINVAL; |
| 1748 | goto out_unlock; |
| 1749 | } |
| 1750 | } else { |
| 1751 | /* Check against the requested. */ |
| 1752 | if (sinfo->sinfo_stream >= |
| 1753 | sinit->sinit_num_ostreams) { |
| 1754 | err = -EINVAL; |
| 1755 | goto out_unlock; |
| 1756 | } |
| 1757 | } |
| 1758 | } |
| 1759 | |
| 1760 | /* |
| 1761 | * API 3.1.2 bind() - UDP Style Syntax |
| 1762 | * If a bind() or sctp_bindx() is not called prior to a |
| 1763 | * sendmsg() call that initiates a new association, the |
| 1764 | * system picks an ephemeral port and will choose an address |
| 1765 | * set equivalent to binding with a wildcard address. |
| 1766 | */ |
| 1767 | if (!ep->base.bind_addr.port) { |
| 1768 | if (sctp_autobind(sk)) { |
| 1769 | err = -EAGAIN; |
| 1770 | goto out_unlock; |
| 1771 | } |
Ivan Skytte Jorgensen | 64a0c1c | 2005-10-28 15:39:02 -0700 | [diff] [blame] | 1772 | } else { |
| 1773 | /* |
| 1774 | * If an unprivileged user inherits a one-to-many |
| 1775 | * style socket with open associations on a privileged |
| 1776 | * port, it MAY be permitted to accept new associations, |
| 1777 | * but it SHOULD NOT be permitted to open new |
| 1778 | * associations. |
| 1779 | */ |
| 1780 | if (ep->base.bind_addr.port < PROT_SOCK && |
| 1781 | !capable(CAP_NET_BIND_SERVICE)) { |
| 1782 | err = -EACCES; |
| 1783 | goto out_unlock; |
| 1784 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1785 | } |
| 1786 | |
| 1787 | scope = sctp_scope(&to); |
| 1788 | new_asoc = sctp_association_new(ep, sk, scope, GFP_KERNEL); |
| 1789 | if (!new_asoc) { |
| 1790 | err = -ENOMEM; |
| 1791 | goto out_unlock; |
| 1792 | } |
| 1793 | asoc = new_asoc; |
Vlad Yasevich | 409b95a | 2009-11-10 08:57:34 +0000 | [diff] [blame] | 1794 | err = sctp_assoc_set_bind_addr_from_ep(asoc, scope, GFP_KERNEL); |
| 1795 | if (err < 0) { |
| 1796 | err = -ENOMEM; |
| 1797 | goto out_free; |
| 1798 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1799 | |
| 1800 | /* If the SCTP_INIT ancillary data is specified, set all |
| 1801 | * the association init values accordingly. |
| 1802 | */ |
| 1803 | if (sinit) { |
| 1804 | if (sinit->sinit_num_ostreams) { |
| 1805 | asoc->c.sinit_num_ostreams = |
| 1806 | sinit->sinit_num_ostreams; |
| 1807 | } |
| 1808 | if (sinit->sinit_max_instreams) { |
| 1809 | asoc->c.sinit_max_instreams = |
| 1810 | sinit->sinit_max_instreams; |
| 1811 | } |
| 1812 | if (sinit->sinit_max_attempts) { |
| 1813 | asoc->max_init_attempts |
| 1814 | = sinit->sinit_max_attempts; |
| 1815 | } |
| 1816 | if (sinit->sinit_max_init_timeo) { |
YOSHIFUJI Hideaki | d808ad9 | 2007-02-09 23:25:18 +0900 | [diff] [blame] | 1817 | asoc->max_init_timeo = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1818 | msecs_to_jiffies(sinit->sinit_max_init_timeo); |
| 1819 | } |
| 1820 | } |
| 1821 | |
| 1822 | /* Prime the peer's transport structures. */ |
Al Viro | dce116a | 2006-11-20 17:25:15 -0800 | [diff] [blame] | 1823 | transport = sctp_assoc_add_peer(asoc, &to, GFP_KERNEL, SCTP_UNKNOWN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1824 | if (!transport) { |
| 1825 | err = -ENOMEM; |
| 1826 | goto out_free; |
| 1827 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1828 | } |
| 1829 | |
| 1830 | /* ASSERT: we have a valid association at this point. */ |
| 1831 | SCTP_DEBUG_PRINTK("We have a valid association.\n"); |
| 1832 | |
| 1833 | if (!sinfo) { |
| 1834 | /* If the user didn't specify SNDRCVINFO, make up one with |
| 1835 | * some defaults. |
| 1836 | */ |
Joe Perches | 517aa0b | 2011-05-12 11:27:20 +0000 | [diff] [blame] | 1837 | memset(&default_sinfo, 0, sizeof(default_sinfo)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1838 | default_sinfo.sinfo_stream = asoc->default_stream; |
| 1839 | default_sinfo.sinfo_flags = asoc->default_flags; |
| 1840 | default_sinfo.sinfo_ppid = asoc->default_ppid; |
| 1841 | default_sinfo.sinfo_context = asoc->default_context; |
| 1842 | default_sinfo.sinfo_timetolive = asoc->default_timetolive; |
| 1843 | default_sinfo.sinfo_assoc_id = sctp_assoc2id(asoc); |
| 1844 | sinfo = &default_sinfo; |
| 1845 | } |
| 1846 | |
| 1847 | /* API 7.1.7, the sndbuf size per association bounds the |
| 1848 | * maximum size of data that can be sent in a single send call. |
| 1849 | */ |
| 1850 | if (msg_len > sk->sk_sndbuf) { |
| 1851 | err = -EMSGSIZE; |
| 1852 | goto out_free; |
| 1853 | } |
| 1854 | |
Vlad Yasevich | 8a47949 | 2007-06-07 14:21:05 -0400 | [diff] [blame] | 1855 | if (asoc->pmtu_pending) |
| 1856 | sctp_assoc_pending_pmtu(asoc); |
| 1857 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1858 | /* If fragmentation is disabled and the message length exceeds the |
| 1859 | * association fragmentation point, return EMSGSIZE. The I-D |
| 1860 | * does not specify what this error is, but this looks like |
| 1861 | * a great fit. |
| 1862 | */ |
| 1863 | if (sctp_sk(sk)->disable_fragments && (msg_len > asoc->frag_point)) { |
| 1864 | err = -EMSGSIZE; |
| 1865 | goto out_free; |
| 1866 | } |
| 1867 | |
Joe Perches | afd7614 | 2011-05-12 09:19:10 +0000 | [diff] [blame] | 1868 | /* Check for invalid stream. */ |
| 1869 | if (sinfo->sinfo_stream >= asoc->c.sinit_num_ostreams) { |
| 1870 | err = -EINVAL; |
| 1871 | goto out_free; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1872 | } |
| 1873 | |
| 1874 | timeo = sock_sndtimeo(sk, msg->msg_flags & MSG_DONTWAIT); |
| 1875 | if (!sctp_wspace(asoc)) { |
| 1876 | err = sctp_wait_for_sndbuf(asoc, &timeo, msg_len); |
| 1877 | if (err) |
| 1878 | goto out_free; |
| 1879 | } |
| 1880 | |
| 1881 | /* If an address is passed with the sendto/sendmsg call, it is used |
| 1882 | * to override the primary destination address in the TCP model, or |
Ivan Skytte Jorgensen | eaa5c54 | 2005-10-28 15:10:00 -0700 | [diff] [blame] | 1883 | * when SCTP_ADDR_OVER flag is set in the UDP model. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1884 | */ |
| 1885 | if ((sctp_style(sk, TCP) && msg_name) || |
Ivan Skytte Jorgensen | eaa5c54 | 2005-10-28 15:10:00 -0700 | [diff] [blame] | 1886 | (sinfo_flags & SCTP_ADDR_OVER)) { |
Al Viro | dce116a | 2006-11-20 17:25:15 -0800 | [diff] [blame] | 1887 | chunk_tp = sctp_assoc_lookup_paddr(asoc, &to); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1888 | if (!chunk_tp) { |
| 1889 | err = -EINVAL; |
| 1890 | goto out_free; |
| 1891 | } |
| 1892 | } else |
| 1893 | chunk_tp = NULL; |
| 1894 | |
| 1895 | /* Auto-connect, if we aren't connected already. */ |
| 1896 | if (sctp_state(asoc, CLOSED)) { |
| 1897 | err = sctp_primitive_ASSOCIATE(asoc, NULL); |
| 1898 | if (err < 0) |
| 1899 | goto out_free; |
| 1900 | SCTP_DEBUG_PRINTK("We associated primitively.\n"); |
| 1901 | } |
| 1902 | |
| 1903 | /* Break the message into multiple chunks of maximum size. */ |
| 1904 | datamsg = sctp_datamsg_from_user(asoc, sinfo, msg, msg_len); |
| 1905 | if (!datamsg) { |
| 1906 | err = -ENOMEM; |
| 1907 | goto out_free; |
| 1908 | } |
| 1909 | |
| 1910 | /* Now send the (possibly) fragmented message. */ |
Robert P. J. Day | 9dbc15f | 2008-04-12 18:54:24 -0700 | [diff] [blame] | 1911 | list_for_each_entry(chunk, &datamsg->chunks, frag_list) { |
Florian Westphal | 80445cf | 2008-03-23 22:47:08 -0700 | [diff] [blame] | 1912 | sctp_chunk_hold(chunk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1913 | |
| 1914 | /* Do accounting for the write space. */ |
| 1915 | sctp_set_owner_w(chunk); |
| 1916 | |
| 1917 | chunk->transport = chunk_tp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1918 | } |
| 1919 | |
Vlad Yasevich | 9c5c62b | 2009-08-10 13:51:03 -0400 | [diff] [blame] | 1920 | /* Send it to the lower layers. Note: all chunks |
| 1921 | * must either fail or succeed. The lower layer |
| 1922 | * works that way today. Keep it that way or this |
| 1923 | * breaks. |
| 1924 | */ |
| 1925 | err = sctp_primitive_SEND(asoc, datamsg); |
| 1926 | /* Did the lower layer accept the chunk? */ |
| 1927 | if (err) |
| 1928 | sctp_datamsg_free(datamsg); |
| 1929 | else |
| 1930 | sctp_datamsg_put(datamsg); |
| 1931 | |
| 1932 | SCTP_DEBUG_PRINTK("We sent primitively.\n"); |
| 1933 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1934 | if (err) |
| 1935 | goto out_free; |
| 1936 | else |
| 1937 | err = msg_len; |
| 1938 | |
| 1939 | /* If we are already past ASSOCIATE, the lower |
| 1940 | * layers are responsible for association cleanup. |
| 1941 | */ |
| 1942 | goto out_unlock; |
| 1943 | |
| 1944 | out_free: |
| 1945 | if (new_asoc) |
| 1946 | sctp_association_free(asoc); |
| 1947 | out_unlock: |
| 1948 | sctp_release_sock(sk); |
| 1949 | |
| 1950 | out_nounlock: |
| 1951 | return sctp_error(sk, msg_flags, err); |
| 1952 | |
| 1953 | #if 0 |
| 1954 | do_sock_err: |
| 1955 | if (msg_len) |
| 1956 | err = msg_len; |
| 1957 | else |
| 1958 | err = sock_error(sk); |
| 1959 | goto out; |
| 1960 | |
| 1961 | do_interrupted: |
| 1962 | if (msg_len) |
| 1963 | err = msg_len; |
| 1964 | goto out; |
| 1965 | #endif /* 0 */ |
| 1966 | } |
| 1967 | |
| 1968 | /* This is an extended version of skb_pull() that removes the data from the |
| 1969 | * start of a skb even when data is spread across the list of skb's in the |
| 1970 | * frag_list. len specifies the total amount of data that needs to be removed. |
| 1971 | * when 'len' bytes could be removed from the skb, it returns 0. |
| 1972 | * If 'len' exceeds the total skb length, it returns the no. of bytes that |
| 1973 | * could not be removed. |
| 1974 | */ |
| 1975 | static int sctp_skb_pull(struct sk_buff *skb, int len) |
| 1976 | { |
| 1977 | struct sk_buff *list; |
| 1978 | int skb_len = skb_headlen(skb); |
| 1979 | int rlen; |
| 1980 | |
| 1981 | if (len <= skb_len) { |
| 1982 | __skb_pull(skb, len); |
| 1983 | return 0; |
| 1984 | } |
| 1985 | len -= skb_len; |
| 1986 | __skb_pull(skb, skb_len); |
| 1987 | |
David S. Miller | 1b003be | 2009-06-09 00:22:35 -0700 | [diff] [blame] | 1988 | skb_walk_frags(skb, list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1989 | rlen = sctp_skb_pull(list, len); |
| 1990 | skb->len -= (len-rlen); |
| 1991 | skb->data_len -= (len-rlen); |
| 1992 | |
| 1993 | if (!rlen) |
| 1994 | return 0; |
| 1995 | |
| 1996 | len = rlen; |
| 1997 | } |
| 1998 | |
| 1999 | return len; |
| 2000 | } |
| 2001 | |
| 2002 | /* API 3.1.3 recvmsg() - UDP Style Syntax |
| 2003 | * |
| 2004 | * ssize_t recvmsg(int socket, struct msghdr *message, |
| 2005 | * int flags); |
| 2006 | * |
| 2007 | * socket - the socket descriptor of the endpoint. |
| 2008 | * message - pointer to the msghdr structure which contains a single |
| 2009 | * user message and possibly some ancillary data. |
| 2010 | * |
| 2011 | * See Section 5 for complete description of the data |
| 2012 | * structures. |
| 2013 | * |
| 2014 | * flags - flags sent or received with the user message, see Section |
| 2015 | * 5 for complete description of the flags. |
| 2016 | */ |
| 2017 | static struct sk_buff *sctp_skb_recv_datagram(struct sock *, int, int, int *); |
| 2018 | |
| 2019 | SCTP_STATIC int sctp_recvmsg(struct kiocb *iocb, struct sock *sk, |
| 2020 | struct msghdr *msg, size_t len, int noblock, |
| 2021 | int flags, int *addr_len) |
| 2022 | { |
| 2023 | struct sctp_ulpevent *event = NULL; |
| 2024 | struct sctp_sock *sp = sctp_sk(sk); |
| 2025 | struct sk_buff *skb; |
| 2026 | int copied; |
| 2027 | int err = 0; |
| 2028 | int skb_len; |
| 2029 | |
| 2030 | SCTP_DEBUG_PRINTK("sctp_recvmsg(%s: %p, %s: %p, %s: %zd, %s: %d, %s: " |
| 2031 | "0x%x, %s: %p)\n", "sk", sk, "msghdr", msg, |
| 2032 | "len", len, "knoblauch", noblock, |
| 2033 | "flags", flags, "addr_len", addr_len); |
| 2034 | |
| 2035 | sctp_lock_sock(sk); |
| 2036 | |
| 2037 | if (sctp_style(sk, TCP) && !sctp_sstate(sk, ESTABLISHED)) { |
| 2038 | err = -ENOTCONN; |
| 2039 | goto out; |
| 2040 | } |
| 2041 | |
| 2042 | skb = sctp_skb_recv_datagram(sk, flags, noblock, &err); |
| 2043 | if (!skb) |
| 2044 | goto out; |
| 2045 | |
| 2046 | /* Get the total length of the skb including any skb's in the |
| 2047 | * frag_list. |
| 2048 | */ |
| 2049 | skb_len = skb->len; |
| 2050 | |
| 2051 | copied = skb_len; |
| 2052 | if (copied > len) |
| 2053 | copied = len; |
| 2054 | |
| 2055 | err = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); |
| 2056 | |
| 2057 | event = sctp_skb2event(skb); |
| 2058 | |
| 2059 | if (err) |
| 2060 | goto out_free; |
| 2061 | |
Neil Horman | 3b88578 | 2009-10-12 13:26:31 -0700 | [diff] [blame] | 2062 | sock_recv_ts_and_drops(msg, sk, skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2063 | if (sctp_ulpevent_is_notification(event)) { |
| 2064 | msg->msg_flags |= MSG_NOTIFICATION; |
| 2065 | sp->pf->event_msgname(event, msg->msg_name, addr_len); |
| 2066 | } else { |
| 2067 | sp->pf->skb_msgname(skb, msg->msg_name, addr_len); |
| 2068 | } |
| 2069 | |
| 2070 | /* Check if we allow SCTP_SNDRCVINFO. */ |
| 2071 | if (sp->subscribe.sctp_data_io_event) |
| 2072 | sctp_ulpevent_read_sndrcvinfo(event, msg); |
| 2073 | #if 0 |
| 2074 | /* FIXME: we should be calling IP/IPv6 layers. */ |
| 2075 | if (sk->sk_protinfo.af_inet.cmsg_flags) |
| 2076 | ip_cmsg_recv(msg, skb); |
| 2077 | #endif |
| 2078 | |
| 2079 | err = copied; |
| 2080 | |
| 2081 | /* If skb's length exceeds the user's buffer, update the skb and |
| 2082 | * push it back to the receive_queue so that the next call to |
| 2083 | * recvmsg() will return the remaining data. Don't set MSG_EOR. |
| 2084 | */ |
| 2085 | if (skb_len > copied) { |
| 2086 | msg->msg_flags &= ~MSG_EOR; |
| 2087 | if (flags & MSG_PEEK) |
| 2088 | goto out_free; |
| 2089 | sctp_skb_pull(skb, copied); |
| 2090 | skb_queue_head(&sk->sk_receive_queue, skb); |
| 2091 | |
| 2092 | /* When only partial message is copied to the user, increase |
| 2093 | * rwnd by that amount. If all the data in the skb is read, |
| 2094 | * rwnd is updated when the event is freed. |
| 2095 | */ |
Vlad Yasevich | 0eca8fe | 2008-01-11 10:12:56 -0500 | [diff] [blame] | 2096 | if (!sctp_ulpevent_is_notification(event)) |
| 2097 | sctp_assoc_rwnd_increase(event->asoc, copied); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2098 | goto out; |
| 2099 | } else if ((event->msg_flags & MSG_NOTIFICATION) || |
| 2100 | (event->msg_flags & MSG_EOR)) |
| 2101 | msg->msg_flags |= MSG_EOR; |
| 2102 | else |
| 2103 | msg->msg_flags &= ~MSG_EOR; |
| 2104 | |
| 2105 | out_free: |
| 2106 | if (flags & MSG_PEEK) { |
| 2107 | /* Release the skb reference acquired after peeking the skb in |
| 2108 | * sctp_skb_recv_datagram(). |
| 2109 | */ |
| 2110 | kfree_skb(skb); |
| 2111 | } else { |
| 2112 | /* Free the event which includes releasing the reference to |
| 2113 | * the owner of the skb, freeing the skb and updating the |
| 2114 | * rwnd. |
| 2115 | */ |
| 2116 | sctp_ulpevent_free(event); |
| 2117 | } |
| 2118 | out: |
| 2119 | sctp_release_sock(sk); |
| 2120 | return err; |
| 2121 | } |
| 2122 | |
| 2123 | /* 7.1.12 Enable/Disable message fragmentation (SCTP_DISABLE_FRAGMENTS) |
| 2124 | * |
| 2125 | * This option is a on/off flag. If enabled no SCTP message |
| 2126 | * fragmentation will be performed. Instead if a message being sent |
| 2127 | * exceeds the current PMTU size, the message will NOT be sent and |
| 2128 | * instead a error will be indicated to the user. |
| 2129 | */ |
| 2130 | static int sctp_setsockopt_disable_fragments(struct sock *sk, |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 2131 | char __user *optval, |
| 2132 | unsigned int optlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2133 | { |
| 2134 | int val; |
| 2135 | |
| 2136 | if (optlen < sizeof(int)) |
| 2137 | return -EINVAL; |
| 2138 | |
| 2139 | if (get_user(val, (int __user *)optval)) |
| 2140 | return -EFAULT; |
| 2141 | |
| 2142 | sctp_sk(sk)->disable_fragments = (val == 0) ? 0 : 1; |
| 2143 | |
| 2144 | return 0; |
| 2145 | } |
| 2146 | |
| 2147 | static int sctp_setsockopt_events(struct sock *sk, char __user *optval, |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 2148 | unsigned int optlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2149 | { |
Wei Yongjun | 9491230 | 2011-07-02 09:28:04 +0000 | [diff] [blame] | 2150 | struct sctp_association *asoc; |
| 2151 | struct sctp_ulpevent *event; |
| 2152 | |
Vlad Yasevich | 7e8616d | 2008-02-27 16:04:52 -0500 | [diff] [blame] | 2153 | if (optlen > sizeof(struct sctp_event_subscribe)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2154 | return -EINVAL; |
| 2155 | if (copy_from_user(&sctp_sk(sk)->subscribe, optval, optlen)) |
| 2156 | return -EFAULT; |
Wei Yongjun | 9491230 | 2011-07-02 09:28:04 +0000 | [diff] [blame] | 2157 | |
| 2158 | /* |
| 2159 | * At the time when a user app subscribes to SCTP_SENDER_DRY_EVENT, |
| 2160 | * if there is no data to be sent or retransmit, the stack will |
| 2161 | * immediately send up this notification. |
| 2162 | */ |
| 2163 | if (sctp_ulpevent_type_enabled(SCTP_SENDER_DRY_EVENT, |
| 2164 | &sctp_sk(sk)->subscribe)) { |
| 2165 | asoc = sctp_id2assoc(sk, 0); |
| 2166 | |
| 2167 | if (asoc && sctp_outq_is_empty(&asoc->outqueue)) { |
| 2168 | event = sctp_ulpevent_make_sender_dry_event(asoc, |
| 2169 | GFP_ATOMIC); |
| 2170 | if (!event) |
| 2171 | return -ENOMEM; |
| 2172 | |
| 2173 | sctp_ulpq_tail_event(&asoc->ulpq, event); |
| 2174 | } |
| 2175 | } |
| 2176 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2177 | return 0; |
| 2178 | } |
| 2179 | |
| 2180 | /* 7.1.8 Automatic Close of associations (SCTP_AUTOCLOSE) |
| 2181 | * |
| 2182 | * This socket option is applicable to the UDP-style socket only. When |
| 2183 | * set it will cause associations that are idle for more than the |
| 2184 | * specified number of seconds to automatically close. An association |
| 2185 | * being idle is defined an association that has NOT sent or received |
| 2186 | * user data. The special value of '0' indicates that no automatic |
| 2187 | * close of any associations should be performed. The option expects an |
| 2188 | * integer defining the number of seconds of idle time before an |
| 2189 | * association is closed. |
| 2190 | */ |
| 2191 | static int sctp_setsockopt_autoclose(struct sock *sk, char __user *optval, |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 2192 | unsigned int optlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2193 | { |
| 2194 | struct sctp_sock *sp = sctp_sk(sk); |
| 2195 | |
| 2196 | /* Applicable to UDP-style socket only */ |
| 2197 | if (sctp_style(sk, TCP)) |
| 2198 | return -EOPNOTSUPP; |
| 2199 | if (optlen != sizeof(int)) |
| 2200 | return -EINVAL; |
| 2201 | if (copy_from_user(&sp->autoclose, optval, optlen)) |
| 2202 | return -EFAULT; |
| 2203 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2204 | return 0; |
| 2205 | } |
| 2206 | |
| 2207 | /* 7.1.13 Peer Address Parameters (SCTP_PEER_ADDR_PARAMS) |
| 2208 | * |
| 2209 | * Applications can enable or disable heartbeats for any peer address of |
| 2210 | * an association, modify an address's heartbeat interval, force a |
| 2211 | * heartbeat to be sent immediately, and adjust the address's maximum |
| 2212 | * number of retransmissions sent before an address is considered |
| 2213 | * unreachable. The following structure is used to access and modify an |
| 2214 | * address's parameters: |
| 2215 | * |
| 2216 | * struct sctp_paddrparams { |
Frank Filz | 52ccb8e | 2005-12-22 11:36:46 -0800 | [diff] [blame] | 2217 | * sctp_assoc_t spp_assoc_id; |
| 2218 | * struct sockaddr_storage spp_address; |
| 2219 | * uint32_t spp_hbinterval; |
| 2220 | * uint16_t spp_pathmaxrxt; |
| 2221 | * uint32_t spp_pathmtu; |
| 2222 | * uint32_t spp_sackdelay; |
| 2223 | * uint32_t spp_flags; |
| 2224 | * }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2225 | * |
Frank Filz | 52ccb8e | 2005-12-22 11:36:46 -0800 | [diff] [blame] | 2226 | * spp_assoc_id - (one-to-many style socket) This is filled in the |
| 2227 | * application, and identifies the association for |
| 2228 | * this query. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2229 | * spp_address - This specifies which address is of interest. |
| 2230 | * spp_hbinterval - This contains the value of the heartbeat interval, |
Frank Filz | 52ccb8e | 2005-12-22 11:36:46 -0800 | [diff] [blame] | 2231 | * in milliseconds. If a value of zero |
| 2232 | * is present in this field then no changes are to |
| 2233 | * be made to this parameter. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2234 | * spp_pathmaxrxt - This contains the maximum number of |
| 2235 | * retransmissions before this address shall be |
Frank Filz | 52ccb8e | 2005-12-22 11:36:46 -0800 | [diff] [blame] | 2236 | * considered unreachable. If a value of zero |
| 2237 | * is present in this field then no changes are to |
| 2238 | * be made to this parameter. |
| 2239 | * spp_pathmtu - When Path MTU discovery is disabled the value |
| 2240 | * specified here will be the "fixed" path mtu. |
| 2241 | * Note that if the spp_address field is empty |
| 2242 | * then all associations on this address will |
| 2243 | * have this fixed path mtu set upon them. |
| 2244 | * |
| 2245 | * spp_sackdelay - When delayed sack is enabled, this value specifies |
| 2246 | * the number of milliseconds that sacks will be delayed |
| 2247 | * for. This value will apply to all addresses of an |
| 2248 | * association if the spp_address field is empty. Note |
| 2249 | * also, that if delayed sack is enabled and this |
| 2250 | * value is set to 0, no change is made to the last |
| 2251 | * recorded delayed sack timer value. |
| 2252 | * |
| 2253 | * spp_flags - These flags are used to control various features |
| 2254 | * on an association. The flag field may contain |
| 2255 | * zero or more of the following options. |
| 2256 | * |
| 2257 | * SPP_HB_ENABLE - Enable heartbeats on the |
| 2258 | * specified address. Note that if the address |
| 2259 | * field is empty all addresses for the association |
| 2260 | * have heartbeats enabled upon them. |
| 2261 | * |
| 2262 | * SPP_HB_DISABLE - Disable heartbeats on the |
| 2263 | * speicifed address. Note that if the address |
| 2264 | * field is empty all addresses for the association |
| 2265 | * will have their heartbeats disabled. Note also |
| 2266 | * that SPP_HB_ENABLE and SPP_HB_DISABLE are |
| 2267 | * mutually exclusive, only one of these two should |
| 2268 | * be specified. Enabling both fields will have |
| 2269 | * undetermined results. |
| 2270 | * |
| 2271 | * SPP_HB_DEMAND - Request a user initiated heartbeat |
| 2272 | * to be made immediately. |
| 2273 | * |
Vlad Yasevich | bdf3092 | 2007-03-23 11:33:12 -0700 | [diff] [blame] | 2274 | * SPP_HB_TIME_IS_ZERO - Specify's that the time for |
| 2275 | * heartbeat delayis to be set to the value of 0 |
| 2276 | * milliseconds. |
| 2277 | * |
Frank Filz | 52ccb8e | 2005-12-22 11:36:46 -0800 | [diff] [blame] | 2278 | * SPP_PMTUD_ENABLE - This field will enable PMTU |
| 2279 | * discovery upon the specified address. Note that |
| 2280 | * if the address feild is empty then all addresses |
| 2281 | * on the association are effected. |
| 2282 | * |
| 2283 | * SPP_PMTUD_DISABLE - This field will disable PMTU |
| 2284 | * discovery upon the specified address. Note that |
| 2285 | * if the address feild is empty then all addresses |
| 2286 | * on the association are effected. Not also that |
| 2287 | * SPP_PMTUD_ENABLE and SPP_PMTUD_DISABLE are mutually |
| 2288 | * exclusive. Enabling both will have undetermined |
| 2289 | * results. |
| 2290 | * |
| 2291 | * SPP_SACKDELAY_ENABLE - Setting this flag turns |
| 2292 | * on delayed sack. The time specified in spp_sackdelay |
| 2293 | * is used to specify the sack delay for this address. Note |
| 2294 | * that if spp_address is empty then all addresses will |
| 2295 | * enable delayed sack and take on the sack delay |
| 2296 | * value specified in spp_sackdelay. |
| 2297 | * SPP_SACKDELAY_DISABLE - Setting this flag turns |
| 2298 | * off delayed sack. If the spp_address field is blank then |
| 2299 | * delayed sack is disabled for the entire association. Note |
| 2300 | * also that this field is mutually exclusive to |
| 2301 | * SPP_SACKDELAY_ENABLE, setting both will have undefined |
| 2302 | * results. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2303 | */ |
Adrian Bunk | 1616436 | 2006-09-18 00:40:38 -0700 | [diff] [blame] | 2304 | static int sctp_apply_peer_addr_params(struct sctp_paddrparams *params, |
| 2305 | struct sctp_transport *trans, |
| 2306 | struct sctp_association *asoc, |
| 2307 | struct sctp_sock *sp, |
| 2308 | int hb_change, |
| 2309 | int pmtud_change, |
| 2310 | int sackdelay_change) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2311 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2312 | int error; |
| 2313 | |
Frank Filz | 52ccb8e | 2005-12-22 11:36:46 -0800 | [diff] [blame] | 2314 | if (params->spp_flags & SPP_HB_DEMAND && trans) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2315 | error = sctp_primitive_REQUESTHEARTBEAT (trans->asoc, trans); |
| 2316 | if (error) |
| 2317 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2318 | } |
| 2319 | |
Vlad Yasevich | bdf3092 | 2007-03-23 11:33:12 -0700 | [diff] [blame] | 2320 | /* Note that unless the spp_flag is set to SPP_HB_ENABLE the value of |
| 2321 | * this field is ignored. Note also that a value of zero indicates |
| 2322 | * the current setting should be left unchanged. |
| 2323 | */ |
| 2324 | if (params->spp_flags & SPP_HB_ENABLE) { |
| 2325 | |
| 2326 | /* Re-zero the interval if the SPP_HB_TIME_IS_ZERO is |
| 2327 | * set. This lets us use 0 value when this flag |
| 2328 | * is set. |
| 2329 | */ |
| 2330 | if (params->spp_flags & SPP_HB_TIME_IS_ZERO) |
| 2331 | params->spp_hbinterval = 0; |
| 2332 | |
| 2333 | if (params->spp_hbinterval || |
| 2334 | (params->spp_flags & SPP_HB_TIME_IS_ZERO)) { |
| 2335 | if (trans) { |
| 2336 | trans->hbinterval = |
| 2337 | msecs_to_jiffies(params->spp_hbinterval); |
| 2338 | } else if (asoc) { |
| 2339 | asoc->hbinterval = |
| 2340 | msecs_to_jiffies(params->spp_hbinterval); |
| 2341 | } else { |
| 2342 | sp->hbinterval = params->spp_hbinterval; |
| 2343 | } |
Frank Filz | 52ccb8e | 2005-12-22 11:36:46 -0800 | [diff] [blame] | 2344 | } |
| 2345 | } |
| 2346 | |
| 2347 | if (hb_change) { |
| 2348 | if (trans) { |
| 2349 | trans->param_flags = |
| 2350 | (trans->param_flags & ~SPP_HB) | hb_change; |
| 2351 | } else if (asoc) { |
| 2352 | asoc->param_flags = |
| 2353 | (asoc->param_flags & ~SPP_HB) | hb_change; |
| 2354 | } else { |
| 2355 | sp->param_flags = |
| 2356 | (sp->param_flags & ~SPP_HB) | hb_change; |
| 2357 | } |
| 2358 | } |
| 2359 | |
Vlad Yasevich | bdf3092 | 2007-03-23 11:33:12 -0700 | [diff] [blame] | 2360 | /* When Path MTU discovery is disabled the value specified here will |
| 2361 | * be the "fixed" path mtu (i.e. the value of the spp_flags field must |
| 2362 | * include the flag SPP_PMTUD_DISABLE for this field to have any |
| 2363 | * effect). |
| 2364 | */ |
| 2365 | if ((params->spp_flags & SPP_PMTUD_DISABLE) && params->spp_pathmtu) { |
Frank Filz | 52ccb8e | 2005-12-22 11:36:46 -0800 | [diff] [blame] | 2366 | if (trans) { |
| 2367 | trans->pathmtu = params->spp_pathmtu; |
| 2368 | sctp_assoc_sync_pmtu(asoc); |
| 2369 | } else if (asoc) { |
| 2370 | asoc->pathmtu = params->spp_pathmtu; |
Vlad Yasevich | f68b2e0 | 2009-09-04 18:21:00 -0400 | [diff] [blame] | 2371 | sctp_frag_point(asoc, params->spp_pathmtu); |
Frank Filz | 52ccb8e | 2005-12-22 11:36:46 -0800 | [diff] [blame] | 2372 | } else { |
| 2373 | sp->pathmtu = params->spp_pathmtu; |
| 2374 | } |
| 2375 | } |
| 2376 | |
| 2377 | if (pmtud_change) { |
| 2378 | if (trans) { |
| 2379 | int update = (trans->param_flags & SPP_PMTUD_DISABLE) && |
| 2380 | (params->spp_flags & SPP_PMTUD_ENABLE); |
| 2381 | trans->param_flags = |
| 2382 | (trans->param_flags & ~SPP_PMTUD) | pmtud_change; |
| 2383 | if (update) { |
Vlad Yasevich | 9914ae3 | 2011-04-26 21:51:31 +0000 | [diff] [blame] | 2384 | sctp_transport_pmtu(trans, sctp_opt2sk(sp)); |
Frank Filz | 52ccb8e | 2005-12-22 11:36:46 -0800 | [diff] [blame] | 2385 | sctp_assoc_sync_pmtu(asoc); |
| 2386 | } |
| 2387 | } else if (asoc) { |
| 2388 | asoc->param_flags = |
| 2389 | (asoc->param_flags & ~SPP_PMTUD) | pmtud_change; |
| 2390 | } else { |
| 2391 | sp->param_flags = |
| 2392 | (sp->param_flags & ~SPP_PMTUD) | pmtud_change; |
| 2393 | } |
| 2394 | } |
| 2395 | |
Vlad Yasevich | bdf3092 | 2007-03-23 11:33:12 -0700 | [diff] [blame] | 2396 | /* Note that unless the spp_flag is set to SPP_SACKDELAY_ENABLE the |
| 2397 | * value of this field is ignored. Note also that a value of zero |
| 2398 | * indicates the current setting should be left unchanged. |
| 2399 | */ |
| 2400 | if ((params->spp_flags & SPP_SACKDELAY_ENABLE) && params->spp_sackdelay) { |
Frank Filz | 52ccb8e | 2005-12-22 11:36:46 -0800 | [diff] [blame] | 2401 | if (trans) { |
| 2402 | trans->sackdelay = |
| 2403 | msecs_to_jiffies(params->spp_sackdelay); |
| 2404 | } else if (asoc) { |
| 2405 | asoc->sackdelay = |
| 2406 | msecs_to_jiffies(params->spp_sackdelay); |
| 2407 | } else { |
| 2408 | sp->sackdelay = params->spp_sackdelay; |
| 2409 | } |
| 2410 | } |
| 2411 | |
| 2412 | if (sackdelay_change) { |
| 2413 | if (trans) { |
| 2414 | trans->param_flags = |
| 2415 | (trans->param_flags & ~SPP_SACKDELAY) | |
| 2416 | sackdelay_change; |
| 2417 | } else if (asoc) { |
| 2418 | asoc->param_flags = |
| 2419 | (asoc->param_flags & ~SPP_SACKDELAY) | |
| 2420 | sackdelay_change; |
| 2421 | } else { |
| 2422 | sp->param_flags = |
| 2423 | (sp->param_flags & ~SPP_SACKDELAY) | |
| 2424 | sackdelay_change; |
| 2425 | } |
| 2426 | } |
| 2427 | |
Andrei Pelinescu-Onciul | 37051f7 | 2009-11-23 15:53:57 -0500 | [diff] [blame] | 2428 | /* Note that a value of zero indicates the current setting should be |
| 2429 | left unchanged. |
Vlad Yasevich | bdf3092 | 2007-03-23 11:33:12 -0700 | [diff] [blame] | 2430 | */ |
Andrei Pelinescu-Onciul | 37051f7 | 2009-11-23 15:53:57 -0500 | [diff] [blame] | 2431 | if (params->spp_pathmaxrxt) { |
Frank Filz | 52ccb8e | 2005-12-22 11:36:46 -0800 | [diff] [blame] | 2432 | if (trans) { |
| 2433 | trans->pathmaxrxt = params->spp_pathmaxrxt; |
| 2434 | } else if (asoc) { |
| 2435 | asoc->pathmaxrxt = params->spp_pathmaxrxt; |
| 2436 | } else { |
| 2437 | sp->pathmaxrxt = params->spp_pathmaxrxt; |
| 2438 | } |
| 2439 | } |
| 2440 | |
| 2441 | return 0; |
| 2442 | } |
| 2443 | |
| 2444 | static int sctp_setsockopt_peer_addr_params(struct sock *sk, |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 2445 | char __user *optval, |
| 2446 | unsigned int optlen) |
Frank Filz | 52ccb8e | 2005-12-22 11:36:46 -0800 | [diff] [blame] | 2447 | { |
| 2448 | struct sctp_paddrparams params; |
| 2449 | struct sctp_transport *trans = NULL; |
| 2450 | struct sctp_association *asoc = NULL; |
| 2451 | struct sctp_sock *sp = sctp_sk(sk); |
| 2452 | int error; |
| 2453 | int hb_change, pmtud_change, sackdelay_change; |
| 2454 | |
| 2455 | if (optlen != sizeof(struct sctp_paddrparams)) |
| 2456 | return - EINVAL; |
| 2457 | |
| 2458 | if (copy_from_user(¶ms, optval, optlen)) |
| 2459 | return -EFAULT; |
| 2460 | |
| 2461 | /* Validate flags and value parameters. */ |
| 2462 | hb_change = params.spp_flags & SPP_HB; |
| 2463 | pmtud_change = params.spp_flags & SPP_PMTUD; |
| 2464 | sackdelay_change = params.spp_flags & SPP_SACKDELAY; |
| 2465 | |
| 2466 | if (hb_change == SPP_HB || |
| 2467 | pmtud_change == SPP_PMTUD || |
| 2468 | sackdelay_change == SPP_SACKDELAY || |
| 2469 | params.spp_sackdelay > 500 || |
Joe Perches | f64f9e7 | 2009-11-29 16:55:45 -0800 | [diff] [blame] | 2470 | (params.spp_pathmtu && |
| 2471 | params.spp_pathmtu < SCTP_DEFAULT_MINSEGMENT)) |
Frank Filz | 52ccb8e | 2005-12-22 11:36:46 -0800 | [diff] [blame] | 2472 | return -EINVAL; |
| 2473 | |
| 2474 | /* If an address other than INADDR_ANY is specified, and |
| 2475 | * no transport is found, then the request is invalid. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2476 | */ |
Vlad Yasevich | 52cae8f | 2008-08-18 10:34:34 -0400 | [diff] [blame] | 2477 | if (!sctp_is_any(sk, ( union sctp_addr *)¶ms.spp_address)) { |
Frank Filz | 52ccb8e | 2005-12-22 11:36:46 -0800 | [diff] [blame] | 2478 | trans = sctp_addr_id2transport(sk, ¶ms.spp_address, |
| 2479 | params.spp_assoc_id); |
| 2480 | if (!trans) |
| 2481 | return -EINVAL; |
| 2482 | } |
| 2483 | |
| 2484 | /* Get association, if assoc_id != 0 and the socket is a one |
| 2485 | * to many style socket, and an association was not found, then |
| 2486 | * the id was invalid. |
| 2487 | */ |
| 2488 | asoc = sctp_id2assoc(sk, params.spp_assoc_id); |
| 2489 | if (!asoc && params.spp_assoc_id && sctp_style(sk, UDP)) |
| 2490 | return -EINVAL; |
| 2491 | |
| 2492 | /* Heartbeat demand can only be sent on a transport or |
| 2493 | * association, but not a socket. |
| 2494 | */ |
| 2495 | if (params.spp_flags & SPP_HB_DEMAND && !trans && !asoc) |
| 2496 | return -EINVAL; |
| 2497 | |
| 2498 | /* Process parameters. */ |
| 2499 | error = sctp_apply_peer_addr_params(¶ms, trans, asoc, sp, |
| 2500 | hb_change, pmtud_change, |
| 2501 | sackdelay_change); |
| 2502 | |
| 2503 | if (error) |
| 2504 | return error; |
| 2505 | |
| 2506 | /* If changes are for association, also apply parameters to each |
| 2507 | * transport. |
| 2508 | */ |
| 2509 | if (!trans && asoc) { |
Robert P. J. Day | 9dbc15f | 2008-04-12 18:54:24 -0700 | [diff] [blame] | 2510 | list_for_each_entry(trans, &asoc->peer.transport_addr_list, |
| 2511 | transports) { |
Frank Filz | 52ccb8e | 2005-12-22 11:36:46 -0800 | [diff] [blame] | 2512 | sctp_apply_peer_addr_params(¶ms, trans, asoc, sp, |
| 2513 | hb_change, pmtud_change, |
| 2514 | sackdelay_change); |
| 2515 | } |
| 2516 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2517 | |
| 2518 | return 0; |
| 2519 | } |
| 2520 | |
Wei Yongjun | d364d92 | 2008-05-09 15:13:26 -0700 | [diff] [blame] | 2521 | /* |
| 2522 | * 7.1.23. Get or set delayed ack timer (SCTP_DELAYED_SACK) |
Frank Filz | 7708610 | 2005-12-22 11:37:30 -0800 | [diff] [blame] | 2523 | * |
Wei Yongjun | d364d92 | 2008-05-09 15:13:26 -0700 | [diff] [blame] | 2524 | * This option will effect the way delayed acks are performed. This |
| 2525 | * option allows you to get or set the delayed ack time, in |
| 2526 | * milliseconds. It also allows changing the delayed ack frequency. |
| 2527 | * Changing the frequency to 1 disables the delayed sack algorithm. If |
| 2528 | * the assoc_id is 0, then this sets or gets the endpoints default |
| 2529 | * values. If the assoc_id field is non-zero, then the set or get |
| 2530 | * effects the specified association for the one to many model (the |
| 2531 | * assoc_id field is ignored by the one to one model). Note that if |
| 2532 | * sack_delay or sack_freq are 0 when setting this option, then the |
| 2533 | * current values will remain unchanged. |
Frank Filz | 7708610 | 2005-12-22 11:37:30 -0800 | [diff] [blame] | 2534 | * |
Wei Yongjun | d364d92 | 2008-05-09 15:13:26 -0700 | [diff] [blame] | 2535 | * struct sctp_sack_info { |
| 2536 | * sctp_assoc_t sack_assoc_id; |
| 2537 | * uint32_t sack_delay; |
| 2538 | * uint32_t sack_freq; |
| 2539 | * }; |
Frank Filz | 7708610 | 2005-12-22 11:37:30 -0800 | [diff] [blame] | 2540 | * |
Wei Yongjun | d364d92 | 2008-05-09 15:13:26 -0700 | [diff] [blame] | 2541 | * sack_assoc_id - This parameter, indicates which association the user |
| 2542 | * is performing an action upon. Note that if this field's value is |
| 2543 | * zero then the endpoints default value is changed (effecting future |
| 2544 | * associations only). |
Frank Filz | 7708610 | 2005-12-22 11:37:30 -0800 | [diff] [blame] | 2545 | * |
Wei Yongjun | d364d92 | 2008-05-09 15:13:26 -0700 | [diff] [blame] | 2546 | * sack_delay - This parameter contains the number of milliseconds that |
| 2547 | * the user is requesting the delayed ACK timer be set to. Note that |
| 2548 | * this value is defined in the standard to be between 200 and 500 |
| 2549 | * milliseconds. |
Frank Filz | 7708610 | 2005-12-22 11:37:30 -0800 | [diff] [blame] | 2550 | * |
Wei Yongjun | d364d92 | 2008-05-09 15:13:26 -0700 | [diff] [blame] | 2551 | * sack_freq - This parameter contains the number of packets that must |
| 2552 | * be received before a sack is sent without waiting for the delay |
| 2553 | * timer to expire. The default value for this is 2, setting this |
| 2554 | * value to 1 will disable the delayed sack algorithm. |
Frank Filz | 7708610 | 2005-12-22 11:37:30 -0800 | [diff] [blame] | 2555 | */ |
| 2556 | |
Wei Yongjun | d364d92 | 2008-05-09 15:13:26 -0700 | [diff] [blame] | 2557 | static int sctp_setsockopt_delayed_ack(struct sock *sk, |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 2558 | char __user *optval, unsigned int optlen) |
Frank Filz | 7708610 | 2005-12-22 11:37:30 -0800 | [diff] [blame] | 2559 | { |
Wei Yongjun | d364d92 | 2008-05-09 15:13:26 -0700 | [diff] [blame] | 2560 | struct sctp_sack_info params; |
Frank Filz | 7708610 | 2005-12-22 11:37:30 -0800 | [diff] [blame] | 2561 | struct sctp_transport *trans = NULL; |
| 2562 | struct sctp_association *asoc = NULL; |
| 2563 | struct sctp_sock *sp = sctp_sk(sk); |
| 2564 | |
Wei Yongjun | d364d92 | 2008-05-09 15:13:26 -0700 | [diff] [blame] | 2565 | if (optlen == sizeof(struct sctp_sack_info)) { |
| 2566 | if (copy_from_user(¶ms, optval, optlen)) |
| 2567 | return -EFAULT; |
| 2568 | |
| 2569 | if (params.sack_delay == 0 && params.sack_freq == 0) |
| 2570 | return 0; |
| 2571 | } else if (optlen == sizeof(struct sctp_assoc_value)) { |
Joe Perches | 145ce50 | 2010-08-24 13:21:08 +0000 | [diff] [blame] | 2572 | pr_warn("Use of struct sctp_assoc_value in delayed_ack socket option deprecated\n"); |
| 2573 | pr_warn("Use struct sctp_sack_info instead\n"); |
Wei Yongjun | d364d92 | 2008-05-09 15:13:26 -0700 | [diff] [blame] | 2574 | if (copy_from_user(¶ms, optval, optlen)) |
| 2575 | return -EFAULT; |
| 2576 | |
| 2577 | if (params.sack_delay == 0) |
| 2578 | params.sack_freq = 1; |
| 2579 | else |
| 2580 | params.sack_freq = 0; |
| 2581 | } else |
Frank Filz | 7708610 | 2005-12-22 11:37:30 -0800 | [diff] [blame] | 2582 | return - EINVAL; |
| 2583 | |
Frank Filz | 7708610 | 2005-12-22 11:37:30 -0800 | [diff] [blame] | 2584 | /* Validate value parameter. */ |
Wei Yongjun | d364d92 | 2008-05-09 15:13:26 -0700 | [diff] [blame] | 2585 | if (params.sack_delay > 500) |
Frank Filz | 7708610 | 2005-12-22 11:37:30 -0800 | [diff] [blame] | 2586 | return -EINVAL; |
| 2587 | |
Wei Yongjun | d364d92 | 2008-05-09 15:13:26 -0700 | [diff] [blame] | 2588 | /* Get association, if sack_assoc_id != 0 and the socket is a one |
Frank Filz | 7708610 | 2005-12-22 11:37:30 -0800 | [diff] [blame] | 2589 | * to many style socket, and an association was not found, then |
| 2590 | * the id was invalid. |
YOSHIFUJI Hideaki | d808ad9 | 2007-02-09 23:25:18 +0900 | [diff] [blame] | 2591 | */ |
Wei Yongjun | d364d92 | 2008-05-09 15:13:26 -0700 | [diff] [blame] | 2592 | asoc = sctp_id2assoc(sk, params.sack_assoc_id); |
| 2593 | if (!asoc && params.sack_assoc_id && sctp_style(sk, UDP)) |
Frank Filz | 7708610 | 2005-12-22 11:37:30 -0800 | [diff] [blame] | 2594 | return -EINVAL; |
| 2595 | |
Wei Yongjun | d364d92 | 2008-05-09 15:13:26 -0700 | [diff] [blame] | 2596 | if (params.sack_delay) { |
Frank Filz | 7708610 | 2005-12-22 11:37:30 -0800 | [diff] [blame] | 2597 | if (asoc) { |
| 2598 | asoc->sackdelay = |
Wei Yongjun | d364d92 | 2008-05-09 15:13:26 -0700 | [diff] [blame] | 2599 | msecs_to_jiffies(params.sack_delay); |
YOSHIFUJI Hideaki | d808ad9 | 2007-02-09 23:25:18 +0900 | [diff] [blame] | 2600 | asoc->param_flags = |
Frank Filz | 7708610 | 2005-12-22 11:37:30 -0800 | [diff] [blame] | 2601 | (asoc->param_flags & ~SPP_SACKDELAY) | |
| 2602 | SPP_SACKDELAY_ENABLE; |
| 2603 | } else { |
Wei Yongjun | d364d92 | 2008-05-09 15:13:26 -0700 | [diff] [blame] | 2604 | sp->sackdelay = params.sack_delay; |
YOSHIFUJI Hideaki | d808ad9 | 2007-02-09 23:25:18 +0900 | [diff] [blame] | 2605 | sp->param_flags = |
Frank Filz | 7708610 | 2005-12-22 11:37:30 -0800 | [diff] [blame] | 2606 | (sp->param_flags & ~SPP_SACKDELAY) | |
| 2607 | SPP_SACKDELAY_ENABLE; |
| 2608 | } |
Wei Yongjun | d364d92 | 2008-05-09 15:13:26 -0700 | [diff] [blame] | 2609 | } |
| 2610 | |
| 2611 | if (params.sack_freq == 1) { |
Frank Filz | 7708610 | 2005-12-22 11:37:30 -0800 | [diff] [blame] | 2612 | if (asoc) { |
YOSHIFUJI Hideaki | d808ad9 | 2007-02-09 23:25:18 +0900 | [diff] [blame] | 2613 | asoc->param_flags = |
Frank Filz | 7708610 | 2005-12-22 11:37:30 -0800 | [diff] [blame] | 2614 | (asoc->param_flags & ~SPP_SACKDELAY) | |
| 2615 | SPP_SACKDELAY_DISABLE; |
| 2616 | } else { |
YOSHIFUJI Hideaki | d808ad9 | 2007-02-09 23:25:18 +0900 | [diff] [blame] | 2617 | sp->param_flags = |
Frank Filz | 7708610 | 2005-12-22 11:37:30 -0800 | [diff] [blame] | 2618 | (sp->param_flags & ~SPP_SACKDELAY) | |
| 2619 | SPP_SACKDELAY_DISABLE; |
| 2620 | } |
Wei Yongjun | d364d92 | 2008-05-09 15:13:26 -0700 | [diff] [blame] | 2621 | } else if (params.sack_freq > 1) { |
| 2622 | if (asoc) { |
| 2623 | asoc->sackfreq = params.sack_freq; |
| 2624 | asoc->param_flags = |
| 2625 | (asoc->param_flags & ~SPP_SACKDELAY) | |
| 2626 | SPP_SACKDELAY_ENABLE; |
| 2627 | } else { |
| 2628 | sp->sackfreq = params.sack_freq; |
| 2629 | sp->param_flags = |
| 2630 | (sp->param_flags & ~SPP_SACKDELAY) | |
| 2631 | SPP_SACKDELAY_ENABLE; |
| 2632 | } |
Frank Filz | 7708610 | 2005-12-22 11:37:30 -0800 | [diff] [blame] | 2633 | } |
| 2634 | |
| 2635 | /* If change is for association, also apply to each transport. */ |
| 2636 | if (asoc) { |
Robert P. J. Day | 9dbc15f | 2008-04-12 18:54:24 -0700 | [diff] [blame] | 2637 | list_for_each_entry(trans, &asoc->peer.transport_addr_list, |
| 2638 | transports) { |
Wei Yongjun | d364d92 | 2008-05-09 15:13:26 -0700 | [diff] [blame] | 2639 | if (params.sack_delay) { |
Frank Filz | 7708610 | 2005-12-22 11:37:30 -0800 | [diff] [blame] | 2640 | trans->sackdelay = |
Wei Yongjun | d364d92 | 2008-05-09 15:13:26 -0700 | [diff] [blame] | 2641 | msecs_to_jiffies(params.sack_delay); |
YOSHIFUJI Hideaki | d808ad9 | 2007-02-09 23:25:18 +0900 | [diff] [blame] | 2642 | trans->param_flags = |
Frank Filz | 7708610 | 2005-12-22 11:37:30 -0800 | [diff] [blame] | 2643 | (trans->param_flags & ~SPP_SACKDELAY) | |
| 2644 | SPP_SACKDELAY_ENABLE; |
Wei Yongjun | d364d92 | 2008-05-09 15:13:26 -0700 | [diff] [blame] | 2645 | } |
Vlad Yasevich | 7bfe8bd | 2008-06-09 15:45:05 -0700 | [diff] [blame] | 2646 | if (params.sack_freq == 1) { |
YOSHIFUJI Hideaki | d808ad9 | 2007-02-09 23:25:18 +0900 | [diff] [blame] | 2647 | trans->param_flags = |
Frank Filz | 7708610 | 2005-12-22 11:37:30 -0800 | [diff] [blame] | 2648 | (trans->param_flags & ~SPP_SACKDELAY) | |
| 2649 | SPP_SACKDELAY_DISABLE; |
Wei Yongjun | d364d92 | 2008-05-09 15:13:26 -0700 | [diff] [blame] | 2650 | } else if (params.sack_freq > 1) { |
| 2651 | trans->sackfreq = params.sack_freq; |
| 2652 | trans->param_flags = |
| 2653 | (trans->param_flags & ~SPP_SACKDELAY) | |
| 2654 | SPP_SACKDELAY_ENABLE; |
Frank Filz | 7708610 | 2005-12-22 11:37:30 -0800 | [diff] [blame] | 2655 | } |
| 2656 | } |
| 2657 | } |
YOSHIFUJI Hideaki | d808ad9 | 2007-02-09 23:25:18 +0900 | [diff] [blame] | 2658 | |
Frank Filz | 7708610 | 2005-12-22 11:37:30 -0800 | [diff] [blame] | 2659 | return 0; |
| 2660 | } |
| 2661 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2662 | /* 7.1.3 Initialization Parameters (SCTP_INITMSG) |
| 2663 | * |
| 2664 | * Applications can specify protocol parameters for the default association |
| 2665 | * initialization. The option name argument to setsockopt() and getsockopt() |
| 2666 | * is SCTP_INITMSG. |
| 2667 | * |
| 2668 | * Setting initialization parameters is effective only on an unconnected |
| 2669 | * socket (for UDP-style sockets only future associations are effected |
| 2670 | * by the change). With TCP-style sockets, this option is inherited by |
| 2671 | * sockets derived from a listener socket. |
| 2672 | */ |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 2673 | static int sctp_setsockopt_initmsg(struct sock *sk, char __user *optval, unsigned int optlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2674 | { |
| 2675 | struct sctp_initmsg sinit; |
| 2676 | struct sctp_sock *sp = sctp_sk(sk); |
| 2677 | |
| 2678 | if (optlen != sizeof(struct sctp_initmsg)) |
| 2679 | return -EINVAL; |
| 2680 | if (copy_from_user(&sinit, optval, optlen)) |
| 2681 | return -EFAULT; |
| 2682 | |
| 2683 | if (sinit.sinit_num_ostreams) |
YOSHIFUJI Hideaki | d808ad9 | 2007-02-09 23:25:18 +0900 | [diff] [blame] | 2684 | sp->initmsg.sinit_num_ostreams = sinit.sinit_num_ostreams; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2685 | if (sinit.sinit_max_instreams) |
YOSHIFUJI Hideaki | d808ad9 | 2007-02-09 23:25:18 +0900 | [diff] [blame] | 2686 | sp->initmsg.sinit_max_instreams = sinit.sinit_max_instreams; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2687 | if (sinit.sinit_max_attempts) |
YOSHIFUJI Hideaki | d808ad9 | 2007-02-09 23:25:18 +0900 | [diff] [blame] | 2688 | sp->initmsg.sinit_max_attempts = sinit.sinit_max_attempts; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2689 | if (sinit.sinit_max_init_timeo) |
YOSHIFUJI Hideaki | d808ad9 | 2007-02-09 23:25:18 +0900 | [diff] [blame] | 2690 | sp->initmsg.sinit_max_init_timeo = sinit.sinit_max_init_timeo; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2691 | |
| 2692 | return 0; |
| 2693 | } |
| 2694 | |
| 2695 | /* |
| 2696 | * 7.1.14 Set default send parameters (SCTP_DEFAULT_SEND_PARAM) |
| 2697 | * |
| 2698 | * Applications that wish to use the sendto() system call may wish to |
| 2699 | * specify a default set of parameters that would normally be supplied |
| 2700 | * through the inclusion of ancillary data. This socket option allows |
| 2701 | * such an application to set the default sctp_sndrcvinfo structure. |
| 2702 | * The application that wishes to use this socket option simply passes |
| 2703 | * in to this call the sctp_sndrcvinfo structure defined in Section |
| 2704 | * 5.2.2) The input parameters accepted by this call include |
| 2705 | * sinfo_stream, sinfo_flags, sinfo_ppid, sinfo_context, |
| 2706 | * sinfo_timetolive. The user must provide the sinfo_assoc_id field in |
| 2707 | * to this call if the caller is using the UDP model. |
| 2708 | */ |
| 2709 | static int sctp_setsockopt_default_send_param(struct sock *sk, |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 2710 | char __user *optval, |
| 2711 | unsigned int optlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2712 | { |
| 2713 | struct sctp_sndrcvinfo info; |
| 2714 | struct sctp_association *asoc; |
| 2715 | struct sctp_sock *sp = sctp_sk(sk); |
| 2716 | |
| 2717 | if (optlen != sizeof(struct sctp_sndrcvinfo)) |
| 2718 | return -EINVAL; |
| 2719 | if (copy_from_user(&info, optval, optlen)) |
| 2720 | return -EFAULT; |
| 2721 | |
| 2722 | asoc = sctp_id2assoc(sk, info.sinfo_assoc_id); |
| 2723 | if (!asoc && info.sinfo_assoc_id && sctp_style(sk, UDP)) |
| 2724 | return -EINVAL; |
| 2725 | |
| 2726 | if (asoc) { |
| 2727 | asoc->default_stream = info.sinfo_stream; |
| 2728 | asoc->default_flags = info.sinfo_flags; |
| 2729 | asoc->default_ppid = info.sinfo_ppid; |
| 2730 | asoc->default_context = info.sinfo_context; |
| 2731 | asoc->default_timetolive = info.sinfo_timetolive; |
| 2732 | } else { |
| 2733 | sp->default_stream = info.sinfo_stream; |
| 2734 | sp->default_flags = info.sinfo_flags; |
| 2735 | sp->default_ppid = info.sinfo_ppid; |
| 2736 | sp->default_context = info.sinfo_context; |
| 2737 | sp->default_timetolive = info.sinfo_timetolive; |
| 2738 | } |
| 2739 | |
| 2740 | return 0; |
| 2741 | } |
| 2742 | |
| 2743 | /* 7.1.10 Set Primary Address (SCTP_PRIMARY_ADDR) |
| 2744 | * |
| 2745 | * Requests that the local SCTP stack use the enclosed peer address as |
| 2746 | * the association primary. The enclosed address must be one of the |
| 2747 | * association peer's addresses. |
| 2748 | */ |
| 2749 | static int sctp_setsockopt_primary_addr(struct sock *sk, char __user *optval, |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 2750 | unsigned int optlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2751 | { |
| 2752 | struct sctp_prim prim; |
| 2753 | struct sctp_transport *trans; |
| 2754 | |
| 2755 | if (optlen != sizeof(struct sctp_prim)) |
| 2756 | return -EINVAL; |
| 2757 | |
| 2758 | if (copy_from_user(&prim, optval, sizeof(struct sctp_prim))) |
| 2759 | return -EFAULT; |
| 2760 | |
| 2761 | trans = sctp_addr_id2transport(sk, &prim.ssp_addr, prim.ssp_assoc_id); |
| 2762 | if (!trans) |
| 2763 | return -EINVAL; |
| 2764 | |
| 2765 | sctp_assoc_set_primary(trans->asoc, trans); |
| 2766 | |
| 2767 | return 0; |
| 2768 | } |
| 2769 | |
| 2770 | /* |
| 2771 | * 7.1.5 SCTP_NODELAY |
| 2772 | * |
| 2773 | * Turn on/off any Nagle-like algorithm. This means that packets are |
| 2774 | * generally sent as soon as possible and no unnecessary delays are |
| 2775 | * introduced, at the cost of more packets in the network. Expects an |
| 2776 | * integer boolean flag. |
| 2777 | */ |
| 2778 | static int sctp_setsockopt_nodelay(struct sock *sk, char __user *optval, |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 2779 | unsigned int optlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2780 | { |
| 2781 | int val; |
| 2782 | |
| 2783 | if (optlen < sizeof(int)) |
| 2784 | return -EINVAL; |
| 2785 | if (get_user(val, (int __user *)optval)) |
| 2786 | return -EFAULT; |
| 2787 | |
| 2788 | sctp_sk(sk)->nodelay = (val == 0) ? 0 : 1; |
| 2789 | return 0; |
| 2790 | } |
| 2791 | |
| 2792 | /* |
| 2793 | * |
| 2794 | * 7.1.1 SCTP_RTOINFO |
| 2795 | * |
| 2796 | * The protocol parameters used to initialize and bound retransmission |
| 2797 | * timeout (RTO) are tunable. sctp_rtoinfo structure is used to access |
| 2798 | * and modify these parameters. |
| 2799 | * All parameters are time values, in milliseconds. A value of 0, when |
| 2800 | * modifying the parameters, indicates that the current value should not |
| 2801 | * be changed. |
| 2802 | * |
| 2803 | */ |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 2804 | static int sctp_setsockopt_rtoinfo(struct sock *sk, char __user *optval, unsigned int optlen) |
| 2805 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2806 | struct sctp_rtoinfo rtoinfo; |
| 2807 | struct sctp_association *asoc; |
| 2808 | |
| 2809 | if (optlen != sizeof (struct sctp_rtoinfo)) |
| 2810 | return -EINVAL; |
| 2811 | |
| 2812 | if (copy_from_user(&rtoinfo, optval, optlen)) |
| 2813 | return -EFAULT; |
| 2814 | |
| 2815 | asoc = sctp_id2assoc(sk, rtoinfo.srto_assoc_id); |
| 2816 | |
| 2817 | /* Set the values to the specific association */ |
| 2818 | if (!asoc && rtoinfo.srto_assoc_id && sctp_style(sk, UDP)) |
| 2819 | return -EINVAL; |
| 2820 | |
| 2821 | if (asoc) { |
| 2822 | if (rtoinfo.srto_initial != 0) |
YOSHIFUJI Hideaki | d808ad9 | 2007-02-09 23:25:18 +0900 | [diff] [blame] | 2823 | asoc->rto_initial = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2824 | msecs_to_jiffies(rtoinfo.srto_initial); |
| 2825 | if (rtoinfo.srto_max != 0) |
| 2826 | asoc->rto_max = msecs_to_jiffies(rtoinfo.srto_max); |
| 2827 | if (rtoinfo.srto_min != 0) |
| 2828 | asoc->rto_min = msecs_to_jiffies(rtoinfo.srto_min); |
| 2829 | } else { |
| 2830 | /* If there is no association or the association-id = 0 |
| 2831 | * set the values to the endpoint. |
| 2832 | */ |
| 2833 | struct sctp_sock *sp = sctp_sk(sk); |
| 2834 | |
| 2835 | if (rtoinfo.srto_initial != 0) |
| 2836 | sp->rtoinfo.srto_initial = rtoinfo.srto_initial; |
| 2837 | if (rtoinfo.srto_max != 0) |
| 2838 | sp->rtoinfo.srto_max = rtoinfo.srto_max; |
| 2839 | if (rtoinfo.srto_min != 0) |
| 2840 | sp->rtoinfo.srto_min = rtoinfo.srto_min; |
| 2841 | } |
| 2842 | |
| 2843 | return 0; |
| 2844 | } |
| 2845 | |
| 2846 | /* |
| 2847 | * |
| 2848 | * 7.1.2 SCTP_ASSOCINFO |
| 2849 | * |
Michael Opdenacker | 59c5159 | 2007-05-09 08:57:56 +0200 | [diff] [blame] | 2850 | * This option is used to tune the maximum retransmission attempts |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2851 | * of the association. |
| 2852 | * Returns an error if the new association retransmission value is |
| 2853 | * greater than the sum of the retransmission value of the peer. |
| 2854 | * See [SCTP] for more information. |
| 2855 | * |
| 2856 | */ |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 2857 | static int sctp_setsockopt_associnfo(struct sock *sk, char __user *optval, unsigned int optlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2858 | { |
| 2859 | |
| 2860 | struct sctp_assocparams assocparams; |
| 2861 | struct sctp_association *asoc; |
| 2862 | |
| 2863 | if (optlen != sizeof(struct sctp_assocparams)) |
| 2864 | return -EINVAL; |
| 2865 | if (copy_from_user(&assocparams, optval, optlen)) |
| 2866 | return -EFAULT; |
| 2867 | |
| 2868 | asoc = sctp_id2assoc(sk, assocparams.sasoc_assoc_id); |
| 2869 | |
| 2870 | if (!asoc && assocparams.sasoc_assoc_id && sctp_style(sk, UDP)) |
| 2871 | return -EINVAL; |
| 2872 | |
| 2873 | /* Set the values to the specific association */ |
| 2874 | if (asoc) { |
Vlad Yasevich | 402d68c | 2006-06-17 22:54:51 -0700 | [diff] [blame] | 2875 | if (assocparams.sasoc_asocmaxrxt != 0) { |
| 2876 | __u32 path_sum = 0; |
| 2877 | int paths = 0; |
Vlad Yasevich | 402d68c | 2006-06-17 22:54:51 -0700 | [diff] [blame] | 2878 | struct sctp_transport *peer_addr; |
| 2879 | |
Robert P. J. Day | 9dbc15f | 2008-04-12 18:54:24 -0700 | [diff] [blame] | 2880 | list_for_each_entry(peer_addr, &asoc->peer.transport_addr_list, |
| 2881 | transports) { |
Vlad Yasevich | 402d68c | 2006-06-17 22:54:51 -0700 | [diff] [blame] | 2882 | path_sum += peer_addr->pathmaxrxt; |
| 2883 | paths++; |
| 2884 | } |
| 2885 | |
Frederik Schwarzer | 025dfda | 2008-10-16 19:02:37 +0200 | [diff] [blame] | 2886 | /* Only validate asocmaxrxt if we have more than |
Vlad Yasevich | 402d68c | 2006-06-17 22:54:51 -0700 | [diff] [blame] | 2887 | * one path/transport. We do this because path |
| 2888 | * retransmissions are only counted when we have more |
| 2889 | * then one path. |
| 2890 | */ |
| 2891 | if (paths > 1 && |
| 2892 | assocparams.sasoc_asocmaxrxt > path_sum) |
| 2893 | return -EINVAL; |
| 2894 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2895 | asoc->max_retrans = assocparams.sasoc_asocmaxrxt; |
Vlad Yasevich | 402d68c | 2006-06-17 22:54:51 -0700 | [diff] [blame] | 2896 | } |
| 2897 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2898 | if (assocparams.sasoc_cookie_life != 0) { |
| 2899 | asoc->cookie_life.tv_sec = |
| 2900 | assocparams.sasoc_cookie_life / 1000; |
| 2901 | asoc->cookie_life.tv_usec = |
| 2902 | (assocparams.sasoc_cookie_life % 1000) |
| 2903 | * 1000; |
| 2904 | } |
| 2905 | } else { |
| 2906 | /* Set the values to the endpoint */ |
| 2907 | struct sctp_sock *sp = sctp_sk(sk); |
| 2908 | |
| 2909 | if (assocparams.sasoc_asocmaxrxt != 0) |
| 2910 | sp->assocparams.sasoc_asocmaxrxt = |
| 2911 | assocparams.sasoc_asocmaxrxt; |
| 2912 | if (assocparams.sasoc_cookie_life != 0) |
| 2913 | sp->assocparams.sasoc_cookie_life = |
| 2914 | assocparams.sasoc_cookie_life; |
| 2915 | } |
| 2916 | return 0; |
| 2917 | } |
| 2918 | |
| 2919 | /* |
| 2920 | * 7.1.16 Set/clear IPv4 mapped addresses (SCTP_I_WANT_MAPPED_V4_ADDR) |
| 2921 | * |
| 2922 | * This socket option is a boolean flag which turns on or off mapped V4 |
| 2923 | * addresses. If this option is turned on and the socket is type |
| 2924 | * PF_INET6, then IPv4 addresses will be mapped to V6 representation. |
| 2925 | * If this option is turned off, then no mapping will be done of V4 |
| 2926 | * addresses and a user will receive both PF_INET6 and PF_INET type |
| 2927 | * addresses on the socket. |
| 2928 | */ |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 2929 | static int sctp_setsockopt_mappedv4(struct sock *sk, char __user *optval, unsigned int optlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2930 | { |
| 2931 | int val; |
| 2932 | struct sctp_sock *sp = sctp_sk(sk); |
| 2933 | |
| 2934 | if (optlen < sizeof(int)) |
| 2935 | return -EINVAL; |
| 2936 | if (get_user(val, (int __user *)optval)) |
| 2937 | return -EFAULT; |
| 2938 | if (val) |
| 2939 | sp->v4mapped = 1; |
| 2940 | else |
| 2941 | sp->v4mapped = 0; |
| 2942 | |
| 2943 | return 0; |
| 2944 | } |
| 2945 | |
| 2946 | /* |
Wei Yongjun | e89c209 | 2008-12-25 16:54:58 -0800 | [diff] [blame] | 2947 | * 8.1.16. Get or Set the Maximum Fragmentation Size (SCTP_MAXSEG) |
| 2948 | * This option will get or set the maximum size to put in any outgoing |
| 2949 | * SCTP DATA chunk. If a message is larger than this size it will be |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2950 | * fragmented by SCTP into the specified size. Note that the underlying |
| 2951 | * SCTP implementation may fragment into smaller sized chunks when the |
| 2952 | * PMTU of the underlying association is smaller than the value set by |
Wei Yongjun | e89c209 | 2008-12-25 16:54:58 -0800 | [diff] [blame] | 2953 | * the user. The default value for this option is '0' which indicates |
| 2954 | * the user is NOT limiting fragmentation and only the PMTU will effect |
| 2955 | * SCTP's choice of DATA chunk size. Note also that values set larger |
| 2956 | * than the maximum size of an IP datagram will effectively let SCTP |
| 2957 | * control fragmentation (i.e. the same as setting this option to 0). |
| 2958 | * |
| 2959 | * The following structure is used to access and modify this parameter: |
| 2960 | * |
| 2961 | * struct sctp_assoc_value { |
| 2962 | * sctp_assoc_t assoc_id; |
| 2963 | * uint32_t assoc_value; |
| 2964 | * }; |
| 2965 | * |
| 2966 | * assoc_id: This parameter is ignored for one-to-one style sockets. |
| 2967 | * For one-to-many style sockets this parameter indicates which |
| 2968 | * association the user is performing an action upon. Note that if |
| 2969 | * this field's value is zero then the endpoints default value is |
| 2970 | * changed (effecting future associations only). |
| 2971 | * assoc_value: This parameter specifies the maximum size in bytes. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2972 | */ |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 2973 | static int sctp_setsockopt_maxseg(struct sock *sk, char __user *optval, unsigned int optlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2974 | { |
Wei Yongjun | e89c209 | 2008-12-25 16:54:58 -0800 | [diff] [blame] | 2975 | struct sctp_assoc_value params; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2976 | struct sctp_association *asoc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2977 | struct sctp_sock *sp = sctp_sk(sk); |
| 2978 | int val; |
| 2979 | |
Wei Yongjun | e89c209 | 2008-12-25 16:54:58 -0800 | [diff] [blame] | 2980 | if (optlen == sizeof(int)) { |
Joe Perches | 145ce50 | 2010-08-24 13:21:08 +0000 | [diff] [blame] | 2981 | pr_warn("Use of int in maxseg socket option deprecated\n"); |
| 2982 | pr_warn("Use struct sctp_assoc_value instead\n"); |
Wei Yongjun | e89c209 | 2008-12-25 16:54:58 -0800 | [diff] [blame] | 2983 | if (copy_from_user(&val, optval, optlen)) |
| 2984 | return -EFAULT; |
| 2985 | params.assoc_id = 0; |
| 2986 | } else if (optlen == sizeof(struct sctp_assoc_value)) { |
| 2987 | if (copy_from_user(¶ms, optval, optlen)) |
| 2988 | return -EFAULT; |
| 2989 | val = params.assoc_value; |
| 2990 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2991 | return -EINVAL; |
Wei Yongjun | e89c209 | 2008-12-25 16:54:58 -0800 | [diff] [blame] | 2992 | |
Ivan Skytte Jorgensen | 96a3399 | 2005-10-28 15:36:12 -0700 | [diff] [blame] | 2993 | if ((val != 0) && ((val < 8) || (val > SCTP_MAX_CHUNK_LEN))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2994 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2995 | |
Wei Yongjun | e89c209 | 2008-12-25 16:54:58 -0800 | [diff] [blame] | 2996 | asoc = sctp_id2assoc(sk, params.assoc_id); |
| 2997 | if (!asoc && params.assoc_id && sctp_style(sk, UDP)) |
| 2998 | return -EINVAL; |
| 2999 | |
| 3000 | if (asoc) { |
| 3001 | if (val == 0) { |
| 3002 | val = asoc->pathmtu; |
| 3003 | val -= sp->pf->af->net_header_len; |
| 3004 | val -= sizeof(struct sctphdr) + |
| 3005 | sizeof(struct sctp_data_chunk); |
| 3006 | } |
Vlad Yasevich | f68b2e0 | 2009-09-04 18:21:00 -0400 | [diff] [blame] | 3007 | asoc->user_frag = val; |
| 3008 | asoc->frag_point = sctp_frag_point(asoc, asoc->pathmtu); |
Wei Yongjun | e89c209 | 2008-12-25 16:54:58 -0800 | [diff] [blame] | 3009 | } else { |
| 3010 | sp->user_frag = val; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3011 | } |
| 3012 | |
| 3013 | return 0; |
| 3014 | } |
| 3015 | |
| 3016 | |
| 3017 | /* |
| 3018 | * 7.1.9 Set Peer Primary Address (SCTP_SET_PEER_PRIMARY_ADDR) |
| 3019 | * |
| 3020 | * Requests that the peer mark the enclosed address as the association |
| 3021 | * primary. The enclosed address must be one of the association's |
| 3022 | * locally bound addresses. The following structure is used to make a |
| 3023 | * set primary request: |
| 3024 | */ |
| 3025 | static int sctp_setsockopt_peer_primary_addr(struct sock *sk, char __user *optval, |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 3026 | unsigned int optlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3027 | { |
| 3028 | struct sctp_sock *sp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3029 | struct sctp_association *asoc = NULL; |
| 3030 | struct sctp_setpeerprim prim; |
| 3031 | struct sctp_chunk *chunk; |
Wei Yongjun | 40a0103 | 2010-12-07 17:11:09 +0000 | [diff] [blame] | 3032 | struct sctp_af *af; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3033 | int err; |
| 3034 | |
| 3035 | sp = sctp_sk(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3036 | |
| 3037 | if (!sctp_addip_enable) |
| 3038 | return -EPERM; |
| 3039 | |
| 3040 | if (optlen != sizeof(struct sctp_setpeerprim)) |
| 3041 | return -EINVAL; |
| 3042 | |
| 3043 | if (copy_from_user(&prim, optval, optlen)) |
| 3044 | return -EFAULT; |
| 3045 | |
| 3046 | asoc = sctp_id2assoc(sk, prim.sspp_assoc_id); |
YOSHIFUJI Hideaki | d808ad9 | 2007-02-09 23:25:18 +0900 | [diff] [blame] | 3047 | if (!asoc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3048 | return -EINVAL; |
| 3049 | |
| 3050 | if (!asoc->peer.asconf_capable) |
| 3051 | return -EPERM; |
| 3052 | |
| 3053 | if (asoc->peer.addip_disabled_mask & SCTP_PARAM_SET_PRIMARY) |
| 3054 | return -EPERM; |
| 3055 | |
| 3056 | if (!sctp_state(asoc, ESTABLISHED)) |
| 3057 | return -ENOTCONN; |
| 3058 | |
Wei Yongjun | 40a0103 | 2010-12-07 17:11:09 +0000 | [diff] [blame] | 3059 | af = sctp_get_af_specific(prim.sspp_addr.ss_family); |
| 3060 | if (!af) |
| 3061 | return -EINVAL; |
| 3062 | |
| 3063 | if (!af->addr_valid((union sctp_addr *)&prim.sspp_addr, sp, NULL)) |
| 3064 | return -EADDRNOTAVAIL; |
| 3065 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3066 | if (!sctp_assoc_lookup_laddr(asoc, (union sctp_addr *)&prim.sspp_addr)) |
| 3067 | return -EADDRNOTAVAIL; |
| 3068 | |
| 3069 | /* Create an ASCONF chunk with SET_PRIMARY parameter */ |
| 3070 | chunk = sctp_make_asconf_set_prim(asoc, |
| 3071 | (union sctp_addr *)&prim.sspp_addr); |
| 3072 | if (!chunk) |
| 3073 | return -ENOMEM; |
| 3074 | |
| 3075 | err = sctp_send_asconf(asoc, chunk); |
| 3076 | |
| 3077 | SCTP_DEBUG_PRINTK("We set peer primary addr primitively.\n"); |
| 3078 | |
| 3079 | return err; |
| 3080 | } |
| 3081 | |
Ivan Skytte Jorgensen | 0f3fffd | 2006-12-20 16:07:04 -0800 | [diff] [blame] | 3082 | static int sctp_setsockopt_adaptation_layer(struct sock *sk, char __user *optval, |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 3083 | unsigned int optlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3084 | { |
Ivan Skytte Jorgensen | 0f3fffd | 2006-12-20 16:07:04 -0800 | [diff] [blame] | 3085 | struct sctp_setadaptation adaptation; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3086 | |
Ivan Skytte Jorgensen | 0f3fffd | 2006-12-20 16:07:04 -0800 | [diff] [blame] | 3087 | if (optlen != sizeof(struct sctp_setadaptation)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3088 | return -EINVAL; |
Ivan Skytte Jorgensen | 0f3fffd | 2006-12-20 16:07:04 -0800 | [diff] [blame] | 3089 | if (copy_from_user(&adaptation, optval, optlen)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3090 | return -EFAULT; |
| 3091 | |
Ivan Skytte Jorgensen | 0f3fffd | 2006-12-20 16:07:04 -0800 | [diff] [blame] | 3092 | sctp_sk(sk)->adaptation_ind = adaptation.ssb_adaptation_ind; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3093 | |
| 3094 | return 0; |
| 3095 | } |
| 3096 | |
Ivan Skytte Jorgensen | 6ab792f | 2006-12-13 16:34:22 -0800 | [diff] [blame] | 3097 | /* |
| 3098 | * 7.1.29. Set or Get the default context (SCTP_CONTEXT) |
| 3099 | * |
| 3100 | * The context field in the sctp_sndrcvinfo structure is normally only |
| 3101 | * used when a failed message is retrieved holding the value that was |
| 3102 | * sent down on the actual send call. This option allows the setting of |
| 3103 | * a default context on an association basis that will be received on |
| 3104 | * reading messages from the peer. This is especially helpful in the |
| 3105 | * one-2-many model for an application to keep some reference to an |
| 3106 | * internal state machine that is processing messages on the |
| 3107 | * association. Note that the setting of this value only effects |
| 3108 | * received messages from the peer and does not effect the value that is |
| 3109 | * saved with outbound messages. |
| 3110 | */ |
| 3111 | static int sctp_setsockopt_context(struct sock *sk, char __user *optval, |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 3112 | unsigned int optlen) |
Ivan Skytte Jorgensen | 6ab792f | 2006-12-13 16:34:22 -0800 | [diff] [blame] | 3113 | { |
| 3114 | struct sctp_assoc_value params; |
| 3115 | struct sctp_sock *sp; |
| 3116 | struct sctp_association *asoc; |
| 3117 | |
| 3118 | if (optlen != sizeof(struct sctp_assoc_value)) |
| 3119 | return -EINVAL; |
| 3120 | if (copy_from_user(¶ms, optval, optlen)) |
| 3121 | return -EFAULT; |
| 3122 | |
| 3123 | sp = sctp_sk(sk); |
| 3124 | |
| 3125 | if (params.assoc_id != 0) { |
| 3126 | asoc = sctp_id2assoc(sk, params.assoc_id); |
| 3127 | if (!asoc) |
| 3128 | return -EINVAL; |
| 3129 | asoc->default_rcv_context = params.assoc_value; |
| 3130 | } else { |
| 3131 | sp->default_rcv_context = params.assoc_value; |
| 3132 | } |
| 3133 | |
| 3134 | return 0; |
| 3135 | } |
| 3136 | |
Vlad Yasevich | b6e1331 | 2007-04-20 12:23:15 -0700 | [diff] [blame] | 3137 | /* |
| 3138 | * 7.1.24. Get or set fragmented interleave (SCTP_FRAGMENT_INTERLEAVE) |
| 3139 | * |
| 3140 | * This options will at a minimum specify if the implementation is doing |
| 3141 | * fragmented interleave. Fragmented interleave, for a one to many |
| 3142 | * socket, is when subsequent calls to receive a message may return |
| 3143 | * parts of messages from different associations. Some implementations |
| 3144 | * may allow you to turn this value on or off. If so, when turned off, |
| 3145 | * no fragment interleave will occur (which will cause a head of line |
| 3146 | * blocking amongst multiple associations sharing the same one to many |
| 3147 | * socket). When this option is turned on, then each receive call may |
| 3148 | * come from a different association (thus the user must receive data |
| 3149 | * with the extended calls (e.g. sctp_recvmsg) to keep track of which |
| 3150 | * association each receive belongs to. |
| 3151 | * |
| 3152 | * This option takes a boolean value. A non-zero value indicates that |
| 3153 | * fragmented interleave is on. A value of zero indicates that |
| 3154 | * fragmented interleave is off. |
| 3155 | * |
| 3156 | * Note that it is important that an implementation that allows this |
| 3157 | * option to be turned on, have it off by default. Otherwise an unaware |
| 3158 | * application using the one to many model may become confused and act |
| 3159 | * incorrectly. |
| 3160 | */ |
| 3161 | static int sctp_setsockopt_fragment_interleave(struct sock *sk, |
| 3162 | char __user *optval, |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 3163 | unsigned int optlen) |
Vlad Yasevich | b6e1331 | 2007-04-20 12:23:15 -0700 | [diff] [blame] | 3164 | { |
| 3165 | int val; |
| 3166 | |
| 3167 | if (optlen != sizeof(int)) |
| 3168 | return -EINVAL; |
| 3169 | if (get_user(val, (int __user *)optval)) |
| 3170 | return -EFAULT; |
| 3171 | |
| 3172 | sctp_sk(sk)->frag_interleave = (val == 0) ? 0 : 1; |
| 3173 | |
| 3174 | return 0; |
| 3175 | } |
| 3176 | |
Vlad Yasevich | d49d91d | 2007-03-23 11:32:00 -0700 | [diff] [blame] | 3177 | /* |
Wei Yongjun | 8510b93 | 2008-12-25 16:59:03 -0800 | [diff] [blame] | 3178 | * 8.1.21. Set or Get the SCTP Partial Delivery Point |
Vlad Yasevich | d49d91d | 2007-03-23 11:32:00 -0700 | [diff] [blame] | 3179 | * (SCTP_PARTIAL_DELIVERY_POINT) |
Wei Yongjun | 8510b93 | 2008-12-25 16:59:03 -0800 | [diff] [blame] | 3180 | * |
Vlad Yasevich | d49d91d | 2007-03-23 11:32:00 -0700 | [diff] [blame] | 3181 | * This option will set or get the SCTP partial delivery point. This |
| 3182 | * point is the size of a message where the partial delivery API will be |
| 3183 | * invoked to help free up rwnd space for the peer. Setting this to a |
Wei Yongjun | 8510b93 | 2008-12-25 16:59:03 -0800 | [diff] [blame] | 3184 | * lower value will cause partial deliveries to happen more often. The |
Vlad Yasevich | d49d91d | 2007-03-23 11:32:00 -0700 | [diff] [blame] | 3185 | * calls argument is an integer that sets or gets the partial delivery |
Wei Yongjun | 8510b93 | 2008-12-25 16:59:03 -0800 | [diff] [blame] | 3186 | * point. Note also that the call will fail if the user attempts to set |
| 3187 | * this value larger than the socket receive buffer size. |
| 3188 | * |
| 3189 | * Note that any single message having a length smaller than or equal to |
| 3190 | * the SCTP partial delivery point will be delivered in one single read |
| 3191 | * call as long as the user provided buffer is large enough to hold the |
| 3192 | * message. |
Vlad Yasevich | d49d91d | 2007-03-23 11:32:00 -0700 | [diff] [blame] | 3193 | */ |
| 3194 | static int sctp_setsockopt_partial_delivery_point(struct sock *sk, |
| 3195 | char __user *optval, |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 3196 | unsigned int optlen) |
Vlad Yasevich | d49d91d | 2007-03-23 11:32:00 -0700 | [diff] [blame] | 3197 | { |
| 3198 | u32 val; |
| 3199 | |
| 3200 | if (optlen != sizeof(u32)) |
| 3201 | return -EINVAL; |
| 3202 | if (get_user(val, (int __user *)optval)) |
| 3203 | return -EFAULT; |
| 3204 | |
Wei Yongjun | 8510b93 | 2008-12-25 16:59:03 -0800 | [diff] [blame] | 3205 | /* Note: We double the receive buffer from what the user sets |
| 3206 | * it to be, also initial rwnd is based on rcvbuf/2. |
| 3207 | */ |
| 3208 | if (val > (sk->sk_rcvbuf >> 1)) |
| 3209 | return -EINVAL; |
| 3210 | |
Vlad Yasevich | d49d91d | 2007-03-23 11:32:00 -0700 | [diff] [blame] | 3211 | sctp_sk(sk)->pd_point = val; |
| 3212 | |
| 3213 | return 0; /* is this the right error code? */ |
| 3214 | } |
| 3215 | |
Vlad Yasevich | 7033157 | 2007-03-23 11:34:36 -0700 | [diff] [blame] | 3216 | /* |
| 3217 | * 7.1.28. Set or Get the maximum burst (SCTP_MAX_BURST) |
| 3218 | * |
| 3219 | * This option will allow a user to change the maximum burst of packets |
| 3220 | * that can be emitted by this association. Note that the default value |
| 3221 | * is 4, and some implementations may restrict this setting so that it |
| 3222 | * can only be lowered. |
| 3223 | * |
| 3224 | * NOTE: This text doesn't seem right. Do this on a socket basis with |
| 3225 | * future associations inheriting the socket value. |
| 3226 | */ |
| 3227 | static int sctp_setsockopt_maxburst(struct sock *sk, |
| 3228 | char __user *optval, |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 3229 | unsigned int optlen) |
Vlad Yasevich | 7033157 | 2007-03-23 11:34:36 -0700 | [diff] [blame] | 3230 | { |
Neil Horman | 219b99a | 2008-03-05 13:44:46 -0800 | [diff] [blame] | 3231 | struct sctp_assoc_value params; |
| 3232 | struct sctp_sock *sp; |
| 3233 | struct sctp_association *asoc; |
Vlad Yasevich | 7033157 | 2007-03-23 11:34:36 -0700 | [diff] [blame] | 3234 | int val; |
Neil Horman | 219b99a | 2008-03-05 13:44:46 -0800 | [diff] [blame] | 3235 | int assoc_id = 0; |
Vlad Yasevich | 7033157 | 2007-03-23 11:34:36 -0700 | [diff] [blame] | 3236 | |
Neil Horman | 219b99a | 2008-03-05 13:44:46 -0800 | [diff] [blame] | 3237 | if (optlen == sizeof(int)) { |
Joe Perches | 145ce50 | 2010-08-24 13:21:08 +0000 | [diff] [blame] | 3238 | pr_warn("Use of int in max_burst socket option deprecated\n"); |
| 3239 | pr_warn("Use struct sctp_assoc_value instead\n"); |
Neil Horman | 219b99a | 2008-03-05 13:44:46 -0800 | [diff] [blame] | 3240 | if (copy_from_user(&val, optval, optlen)) |
| 3241 | return -EFAULT; |
| 3242 | } else if (optlen == sizeof(struct sctp_assoc_value)) { |
| 3243 | if (copy_from_user(¶ms, optval, optlen)) |
| 3244 | return -EFAULT; |
| 3245 | val = params.assoc_value; |
| 3246 | assoc_id = params.assoc_id; |
| 3247 | } else |
| 3248 | return -EINVAL; |
| 3249 | |
| 3250 | sp = sctp_sk(sk); |
| 3251 | |
| 3252 | if (assoc_id != 0) { |
| 3253 | asoc = sctp_id2assoc(sk, assoc_id); |
| 3254 | if (!asoc) |
| 3255 | return -EINVAL; |
| 3256 | asoc->max_burst = val; |
| 3257 | } else |
| 3258 | sp->max_burst = val; |
Vlad Yasevich | 7033157 | 2007-03-23 11:34:36 -0700 | [diff] [blame] | 3259 | |
| 3260 | return 0; |
| 3261 | } |
| 3262 | |
Vlad Yasevich | 65b07e5 | 2007-09-16 19:34:00 -0700 | [diff] [blame] | 3263 | /* |
| 3264 | * 7.1.18. Add a chunk that must be authenticated (SCTP_AUTH_CHUNK) |
| 3265 | * |
| 3266 | * This set option adds a chunk type that the user is requesting to be |
| 3267 | * received only in an authenticated way. Changes to the list of chunks |
| 3268 | * will only effect future associations on the socket. |
| 3269 | */ |
| 3270 | static int sctp_setsockopt_auth_chunk(struct sock *sk, |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 3271 | char __user *optval, |
| 3272 | unsigned int optlen) |
Vlad Yasevich | 65b07e5 | 2007-09-16 19:34:00 -0700 | [diff] [blame] | 3273 | { |
| 3274 | struct sctp_authchunk val; |
| 3275 | |
Vlad Yasevich | 5e739d1 | 2008-08-21 03:34:25 -0700 | [diff] [blame] | 3276 | if (!sctp_auth_enable) |
| 3277 | return -EACCES; |
| 3278 | |
Vlad Yasevich | 65b07e5 | 2007-09-16 19:34:00 -0700 | [diff] [blame] | 3279 | if (optlen != sizeof(struct sctp_authchunk)) |
| 3280 | return -EINVAL; |
| 3281 | if (copy_from_user(&val, optval, optlen)) |
| 3282 | return -EFAULT; |
| 3283 | |
| 3284 | switch (val.sauth_chunk) { |
Joe Perches | 7fd71b1 | 2011-07-01 09:43:11 +0000 | [diff] [blame] | 3285 | case SCTP_CID_INIT: |
| 3286 | case SCTP_CID_INIT_ACK: |
| 3287 | case SCTP_CID_SHUTDOWN_COMPLETE: |
| 3288 | case SCTP_CID_AUTH: |
| 3289 | return -EINVAL; |
Vlad Yasevich | 65b07e5 | 2007-09-16 19:34:00 -0700 | [diff] [blame] | 3290 | } |
| 3291 | |
| 3292 | /* add this chunk id to the endpoint */ |
| 3293 | return sctp_auth_ep_add_chunkid(sctp_sk(sk)->ep, val.sauth_chunk); |
| 3294 | } |
| 3295 | |
| 3296 | /* |
| 3297 | * 7.1.19. Get or set the list of supported HMAC Identifiers (SCTP_HMAC_IDENT) |
| 3298 | * |
| 3299 | * This option gets or sets the list of HMAC algorithms that the local |
| 3300 | * endpoint requires the peer to use. |
| 3301 | */ |
| 3302 | static int sctp_setsockopt_hmac_ident(struct sock *sk, |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 3303 | char __user *optval, |
| 3304 | unsigned int optlen) |
Vlad Yasevich | 65b07e5 | 2007-09-16 19:34:00 -0700 | [diff] [blame] | 3305 | { |
| 3306 | struct sctp_hmacalgo *hmacs; |
Vlad Yasevich | d972405 | 2008-08-27 16:09:49 -0700 | [diff] [blame] | 3307 | u32 idents; |
Vlad Yasevich | 65b07e5 | 2007-09-16 19:34:00 -0700 | [diff] [blame] | 3308 | int err; |
| 3309 | |
Vlad Yasevich | 5e739d1 | 2008-08-21 03:34:25 -0700 | [diff] [blame] | 3310 | if (!sctp_auth_enable) |
| 3311 | return -EACCES; |
| 3312 | |
Vlad Yasevich | 65b07e5 | 2007-09-16 19:34:00 -0700 | [diff] [blame] | 3313 | if (optlen < sizeof(struct sctp_hmacalgo)) |
| 3314 | return -EINVAL; |
| 3315 | |
Shan Wei | 934253a | 2011-04-18 19:13:18 +0000 | [diff] [blame] | 3316 | hmacs= memdup_user(optval, optlen); |
| 3317 | if (IS_ERR(hmacs)) |
| 3318 | return PTR_ERR(hmacs); |
Vlad Yasevich | 65b07e5 | 2007-09-16 19:34:00 -0700 | [diff] [blame] | 3319 | |
Vlad Yasevich | d972405 | 2008-08-27 16:09:49 -0700 | [diff] [blame] | 3320 | idents = hmacs->shmac_num_idents; |
| 3321 | if (idents == 0 || idents > SCTP_AUTH_NUM_HMACS || |
| 3322 | (idents * sizeof(u16)) > (optlen - sizeof(struct sctp_hmacalgo))) { |
Vlad Yasevich | 65b07e5 | 2007-09-16 19:34:00 -0700 | [diff] [blame] | 3323 | err = -EINVAL; |
| 3324 | goto out; |
| 3325 | } |
| 3326 | |
| 3327 | err = sctp_auth_ep_set_hmacs(sctp_sk(sk)->ep, hmacs); |
| 3328 | out: |
| 3329 | kfree(hmacs); |
| 3330 | return err; |
| 3331 | } |
| 3332 | |
| 3333 | /* |
| 3334 | * 7.1.20. Set a shared key (SCTP_AUTH_KEY) |
| 3335 | * |
| 3336 | * This option will set a shared secret key which is used to build an |
| 3337 | * association shared key. |
| 3338 | */ |
| 3339 | static int sctp_setsockopt_auth_key(struct sock *sk, |
| 3340 | char __user *optval, |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 3341 | unsigned int optlen) |
Vlad Yasevich | 65b07e5 | 2007-09-16 19:34:00 -0700 | [diff] [blame] | 3342 | { |
| 3343 | struct sctp_authkey *authkey; |
| 3344 | struct sctp_association *asoc; |
| 3345 | int ret; |
| 3346 | |
Vlad Yasevich | 5e739d1 | 2008-08-21 03:34:25 -0700 | [diff] [blame] | 3347 | if (!sctp_auth_enable) |
| 3348 | return -EACCES; |
| 3349 | |
Vlad Yasevich | 65b07e5 | 2007-09-16 19:34:00 -0700 | [diff] [blame] | 3350 | if (optlen <= sizeof(struct sctp_authkey)) |
| 3351 | return -EINVAL; |
| 3352 | |
Shan Wei | 934253a | 2011-04-18 19:13:18 +0000 | [diff] [blame] | 3353 | authkey= memdup_user(optval, optlen); |
| 3354 | if (IS_ERR(authkey)) |
| 3355 | return PTR_ERR(authkey); |
Vlad Yasevich | 65b07e5 | 2007-09-16 19:34:00 -0700 | [diff] [blame] | 3356 | |
Vlad Yasevich | 328fc47 | 2008-08-27 16:08:54 -0700 | [diff] [blame] | 3357 | if (authkey->sca_keylength > optlen - sizeof(struct sctp_authkey)) { |
Vlad Yasevich | 30c2235 | 2008-08-25 15:16:19 -0700 | [diff] [blame] | 3358 | ret = -EINVAL; |
| 3359 | goto out; |
| 3360 | } |
| 3361 | |
Vlad Yasevich | 65b07e5 | 2007-09-16 19:34:00 -0700 | [diff] [blame] | 3362 | asoc = sctp_id2assoc(sk, authkey->sca_assoc_id); |
| 3363 | if (!asoc && authkey->sca_assoc_id && sctp_style(sk, UDP)) { |
| 3364 | ret = -EINVAL; |
| 3365 | goto out; |
| 3366 | } |
| 3367 | |
| 3368 | ret = sctp_auth_set_key(sctp_sk(sk)->ep, asoc, authkey); |
| 3369 | out: |
| 3370 | kfree(authkey); |
| 3371 | return ret; |
| 3372 | } |
| 3373 | |
| 3374 | /* |
| 3375 | * 7.1.21. Get or set the active shared key (SCTP_AUTH_ACTIVE_KEY) |
| 3376 | * |
| 3377 | * This option will get or set the active shared key to be used to build |
| 3378 | * the association shared key. |
| 3379 | */ |
| 3380 | static int sctp_setsockopt_active_key(struct sock *sk, |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 3381 | char __user *optval, |
| 3382 | unsigned int optlen) |
Vlad Yasevich | 65b07e5 | 2007-09-16 19:34:00 -0700 | [diff] [blame] | 3383 | { |
| 3384 | struct sctp_authkeyid val; |
| 3385 | struct sctp_association *asoc; |
| 3386 | |
Vlad Yasevich | 5e739d1 | 2008-08-21 03:34:25 -0700 | [diff] [blame] | 3387 | if (!sctp_auth_enable) |
| 3388 | return -EACCES; |
| 3389 | |
Vlad Yasevich | 65b07e5 | 2007-09-16 19:34:00 -0700 | [diff] [blame] | 3390 | if (optlen != sizeof(struct sctp_authkeyid)) |
| 3391 | return -EINVAL; |
| 3392 | if (copy_from_user(&val, optval, optlen)) |
| 3393 | return -EFAULT; |
| 3394 | |
| 3395 | asoc = sctp_id2assoc(sk, val.scact_assoc_id); |
| 3396 | if (!asoc && val.scact_assoc_id && sctp_style(sk, UDP)) |
| 3397 | return -EINVAL; |
| 3398 | |
| 3399 | return sctp_auth_set_active_key(sctp_sk(sk)->ep, asoc, |
| 3400 | val.scact_keynumber); |
| 3401 | } |
| 3402 | |
| 3403 | /* |
| 3404 | * 7.1.22. Delete a shared key (SCTP_AUTH_DELETE_KEY) |
| 3405 | * |
| 3406 | * This set option will delete a shared secret key from use. |
| 3407 | */ |
| 3408 | static int sctp_setsockopt_del_key(struct sock *sk, |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 3409 | char __user *optval, |
| 3410 | unsigned int optlen) |
Vlad Yasevich | 65b07e5 | 2007-09-16 19:34:00 -0700 | [diff] [blame] | 3411 | { |
| 3412 | struct sctp_authkeyid val; |
| 3413 | struct sctp_association *asoc; |
| 3414 | |
Vlad Yasevich | 5e739d1 | 2008-08-21 03:34:25 -0700 | [diff] [blame] | 3415 | if (!sctp_auth_enable) |
| 3416 | return -EACCES; |
| 3417 | |
Vlad Yasevich | 65b07e5 | 2007-09-16 19:34:00 -0700 | [diff] [blame] | 3418 | if (optlen != sizeof(struct sctp_authkeyid)) |
| 3419 | return -EINVAL; |
| 3420 | if (copy_from_user(&val, optval, optlen)) |
| 3421 | return -EFAULT; |
| 3422 | |
| 3423 | asoc = sctp_id2assoc(sk, val.scact_assoc_id); |
| 3424 | if (!asoc && val.scact_assoc_id && sctp_style(sk, UDP)) |
| 3425 | return -EINVAL; |
| 3426 | |
| 3427 | return sctp_auth_del_key_id(sctp_sk(sk)->ep, asoc, |
| 3428 | val.scact_keynumber); |
| 3429 | |
| 3430 | } |
| 3431 | |
Michio Honda | 7dc04d7 | 2011-04-26 20:16:31 +0900 | [diff] [blame] | 3432 | /* |
| 3433 | * 8.1.23 SCTP_AUTO_ASCONF |
| 3434 | * |
| 3435 | * This option will enable or disable the use of the automatic generation of |
| 3436 | * ASCONF chunks to add and delete addresses to an existing association. Note |
| 3437 | * that this option has two caveats namely: a) it only affects sockets that |
| 3438 | * are bound to all addresses available to the SCTP stack, and b) the system |
| 3439 | * administrator may have an overriding control that turns the ASCONF feature |
| 3440 | * off no matter what setting the socket option may have. |
| 3441 | * This option expects an integer boolean flag, where a non-zero value turns on |
| 3442 | * the option, and a zero value turns off the option. |
| 3443 | * Note. In this implementation, socket operation overrides default parameter |
| 3444 | * being set by sysctl as well as FreeBSD implementation |
| 3445 | */ |
| 3446 | static int sctp_setsockopt_auto_asconf(struct sock *sk, char __user *optval, |
| 3447 | unsigned int optlen) |
| 3448 | { |
| 3449 | int val; |
| 3450 | struct sctp_sock *sp = sctp_sk(sk); |
| 3451 | |
| 3452 | if (optlen < sizeof(int)) |
| 3453 | return -EINVAL; |
| 3454 | if (get_user(val, (int __user *)optval)) |
| 3455 | return -EFAULT; |
| 3456 | if (!sctp_is_ep_boundall(sk) && val) |
| 3457 | return -EINVAL; |
| 3458 | if ((val && sp->do_auto_asconf) || (!val && !sp->do_auto_asconf)) |
| 3459 | return 0; |
| 3460 | |
| 3461 | if (val == 0 && sp->do_auto_asconf) { |
| 3462 | list_del(&sp->auto_asconf_list); |
| 3463 | sp->do_auto_asconf = 0; |
| 3464 | } else if (val && !sp->do_auto_asconf) { |
| 3465 | list_add_tail(&sp->auto_asconf_list, |
| 3466 | &sctp_auto_asconf_splist); |
| 3467 | sp->do_auto_asconf = 1; |
| 3468 | } |
| 3469 | return 0; |
| 3470 | } |
| 3471 | |
Vlad Yasevich | 65b07e5 | 2007-09-16 19:34:00 -0700 | [diff] [blame] | 3472 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3473 | /* API 6.2 setsockopt(), getsockopt() |
| 3474 | * |
| 3475 | * Applications use setsockopt() and getsockopt() to set or retrieve |
| 3476 | * socket options. Socket options are used to change the default |
| 3477 | * behavior of sockets calls. They are described in Section 7. |
| 3478 | * |
| 3479 | * The syntax is: |
| 3480 | * |
| 3481 | * ret = getsockopt(int sd, int level, int optname, void __user *optval, |
| 3482 | * int __user *optlen); |
| 3483 | * ret = setsockopt(int sd, int level, int optname, const void __user *optval, |
| 3484 | * int optlen); |
| 3485 | * |
| 3486 | * sd - the socket descript. |
| 3487 | * level - set to IPPROTO_SCTP for all SCTP options. |
| 3488 | * optname - the option name. |
| 3489 | * optval - the buffer to store the value of the option. |
| 3490 | * optlen - the size of the buffer. |
| 3491 | */ |
| 3492 | SCTP_STATIC int sctp_setsockopt(struct sock *sk, int level, int optname, |
David S. Miller | b705884 | 2009-09-30 16:12:20 -0700 | [diff] [blame] | 3493 | char __user *optval, unsigned int optlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3494 | { |
| 3495 | int retval = 0; |
| 3496 | |
| 3497 | SCTP_DEBUG_PRINTK("sctp_setsockopt(sk: %p... optname: %d)\n", |
| 3498 | sk, optname); |
| 3499 | |
| 3500 | /* I can hardly begin to describe how wrong this is. This is |
| 3501 | * so broken as to be worse than useless. The API draft |
| 3502 | * REALLY is NOT helpful here... I am not convinced that the |
| 3503 | * semantics of setsockopt() with a level OTHER THAN SOL_SCTP |
| 3504 | * are at all well-founded. |
| 3505 | */ |
| 3506 | if (level != SOL_SCTP) { |
| 3507 | struct sctp_af *af = sctp_sk(sk)->pf->af; |
| 3508 | retval = af->setsockopt(sk, level, optname, optval, optlen); |
| 3509 | goto out_nounlock; |
| 3510 | } |
| 3511 | |
| 3512 | sctp_lock_sock(sk); |
| 3513 | |
| 3514 | switch (optname) { |
| 3515 | case SCTP_SOCKOPT_BINDX_ADD: |
| 3516 | /* 'optlen' is the size of the addresses buffer. */ |
| 3517 | retval = sctp_setsockopt_bindx(sk, (struct sockaddr __user *)optval, |
| 3518 | optlen, SCTP_BINDX_ADD_ADDR); |
| 3519 | break; |
| 3520 | |
| 3521 | case SCTP_SOCKOPT_BINDX_REM: |
| 3522 | /* 'optlen' is the size of the addresses buffer. */ |
| 3523 | retval = sctp_setsockopt_bindx(sk, (struct sockaddr __user *)optval, |
| 3524 | optlen, SCTP_BINDX_REM_ADDR); |
| 3525 | break; |
| 3526 | |
Vlad Yasevich | 88a0a94 | 2008-05-09 15:14:11 -0700 | [diff] [blame] | 3527 | case SCTP_SOCKOPT_CONNECTX_OLD: |
| 3528 | /* 'optlen' is the size of the addresses buffer. */ |
| 3529 | retval = sctp_setsockopt_connectx_old(sk, |
| 3530 | (struct sockaddr __user *)optval, |
| 3531 | optlen); |
| 3532 | break; |
| 3533 | |
Frank Filz | 3f7a87d | 2005-06-20 13:14:57 -0700 | [diff] [blame] | 3534 | case SCTP_SOCKOPT_CONNECTX: |
| 3535 | /* 'optlen' is the size of the addresses buffer. */ |
Vlad Yasevich | 88a0a94 | 2008-05-09 15:14:11 -0700 | [diff] [blame] | 3536 | retval = sctp_setsockopt_connectx(sk, |
| 3537 | (struct sockaddr __user *)optval, |
| 3538 | optlen); |
Frank Filz | 3f7a87d | 2005-06-20 13:14:57 -0700 | [diff] [blame] | 3539 | break; |
| 3540 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3541 | case SCTP_DISABLE_FRAGMENTS: |
| 3542 | retval = sctp_setsockopt_disable_fragments(sk, optval, optlen); |
| 3543 | break; |
| 3544 | |
| 3545 | case SCTP_EVENTS: |
| 3546 | retval = sctp_setsockopt_events(sk, optval, optlen); |
| 3547 | break; |
| 3548 | |
| 3549 | case SCTP_AUTOCLOSE: |
| 3550 | retval = sctp_setsockopt_autoclose(sk, optval, optlen); |
| 3551 | break; |
| 3552 | |
| 3553 | case SCTP_PEER_ADDR_PARAMS: |
| 3554 | retval = sctp_setsockopt_peer_addr_params(sk, optval, optlen); |
| 3555 | break; |
| 3556 | |
Shan Wei | 4580ccc | 2011-01-18 22:39:00 +0000 | [diff] [blame] | 3557 | case SCTP_DELAYED_SACK: |
Wei Yongjun | d364d92 | 2008-05-09 15:13:26 -0700 | [diff] [blame] | 3558 | retval = sctp_setsockopt_delayed_ack(sk, optval, optlen); |
Frank Filz | 7708610 | 2005-12-22 11:37:30 -0800 | [diff] [blame] | 3559 | break; |
Vlad Yasevich | d49d91d | 2007-03-23 11:32:00 -0700 | [diff] [blame] | 3560 | case SCTP_PARTIAL_DELIVERY_POINT: |
| 3561 | retval = sctp_setsockopt_partial_delivery_point(sk, optval, optlen); |
| 3562 | break; |
Frank Filz | 7708610 | 2005-12-22 11:37:30 -0800 | [diff] [blame] | 3563 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3564 | case SCTP_INITMSG: |
| 3565 | retval = sctp_setsockopt_initmsg(sk, optval, optlen); |
| 3566 | break; |
| 3567 | case SCTP_DEFAULT_SEND_PARAM: |
| 3568 | retval = sctp_setsockopt_default_send_param(sk, optval, |
| 3569 | optlen); |
| 3570 | break; |
| 3571 | case SCTP_PRIMARY_ADDR: |
| 3572 | retval = sctp_setsockopt_primary_addr(sk, optval, optlen); |
| 3573 | break; |
| 3574 | case SCTP_SET_PEER_PRIMARY_ADDR: |
| 3575 | retval = sctp_setsockopt_peer_primary_addr(sk, optval, optlen); |
| 3576 | break; |
| 3577 | case SCTP_NODELAY: |
| 3578 | retval = sctp_setsockopt_nodelay(sk, optval, optlen); |
| 3579 | break; |
| 3580 | case SCTP_RTOINFO: |
| 3581 | retval = sctp_setsockopt_rtoinfo(sk, optval, optlen); |
| 3582 | break; |
| 3583 | case SCTP_ASSOCINFO: |
| 3584 | retval = sctp_setsockopt_associnfo(sk, optval, optlen); |
| 3585 | break; |
| 3586 | case SCTP_I_WANT_MAPPED_V4_ADDR: |
| 3587 | retval = sctp_setsockopt_mappedv4(sk, optval, optlen); |
| 3588 | break; |
| 3589 | case SCTP_MAXSEG: |
| 3590 | retval = sctp_setsockopt_maxseg(sk, optval, optlen); |
| 3591 | break; |
Ivan Skytte Jorgensen | 0f3fffd | 2006-12-20 16:07:04 -0800 | [diff] [blame] | 3592 | case SCTP_ADAPTATION_LAYER: |
| 3593 | retval = sctp_setsockopt_adaptation_layer(sk, optval, optlen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3594 | break; |
Ivan Skytte Jorgensen | 6ab792f | 2006-12-13 16:34:22 -0800 | [diff] [blame] | 3595 | case SCTP_CONTEXT: |
| 3596 | retval = sctp_setsockopt_context(sk, optval, optlen); |
| 3597 | break; |
Vlad Yasevich | b6e1331 | 2007-04-20 12:23:15 -0700 | [diff] [blame] | 3598 | case SCTP_FRAGMENT_INTERLEAVE: |
| 3599 | retval = sctp_setsockopt_fragment_interleave(sk, optval, optlen); |
| 3600 | break; |
Vlad Yasevich | 7033157 | 2007-03-23 11:34:36 -0700 | [diff] [blame] | 3601 | case SCTP_MAX_BURST: |
| 3602 | retval = sctp_setsockopt_maxburst(sk, optval, optlen); |
| 3603 | break; |
Vlad Yasevich | 65b07e5 | 2007-09-16 19:34:00 -0700 | [diff] [blame] | 3604 | case SCTP_AUTH_CHUNK: |
| 3605 | retval = sctp_setsockopt_auth_chunk(sk, optval, optlen); |
| 3606 | break; |
| 3607 | case SCTP_HMAC_IDENT: |
| 3608 | retval = sctp_setsockopt_hmac_ident(sk, optval, optlen); |
| 3609 | break; |
| 3610 | case SCTP_AUTH_KEY: |
| 3611 | retval = sctp_setsockopt_auth_key(sk, optval, optlen); |
| 3612 | break; |
| 3613 | case SCTP_AUTH_ACTIVE_KEY: |
| 3614 | retval = sctp_setsockopt_active_key(sk, optval, optlen); |
| 3615 | break; |
| 3616 | case SCTP_AUTH_DELETE_KEY: |
| 3617 | retval = sctp_setsockopt_del_key(sk, optval, optlen); |
| 3618 | break; |
Michio Honda | 7dc04d7 | 2011-04-26 20:16:31 +0900 | [diff] [blame] | 3619 | case SCTP_AUTO_ASCONF: |
| 3620 | retval = sctp_setsockopt_auto_asconf(sk, optval, optlen); |
| 3621 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3622 | default: |
| 3623 | retval = -ENOPROTOOPT; |
| 3624 | break; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 3625 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3626 | |
| 3627 | sctp_release_sock(sk); |
| 3628 | |
| 3629 | out_nounlock: |
| 3630 | return retval; |
| 3631 | } |
| 3632 | |
| 3633 | /* API 3.1.6 connect() - UDP Style Syntax |
| 3634 | * |
| 3635 | * An application may use the connect() call in the UDP model to initiate an |
| 3636 | * association without sending data. |
| 3637 | * |
| 3638 | * The syntax is: |
| 3639 | * |
| 3640 | * ret = connect(int sd, const struct sockaddr *nam, socklen_t len); |
| 3641 | * |
| 3642 | * sd: the socket descriptor to have a new association added to. |
| 3643 | * |
| 3644 | * nam: the address structure (either struct sockaddr_in or struct |
| 3645 | * sockaddr_in6 defined in RFC2553 [7]). |
| 3646 | * |
| 3647 | * len: the size of the address. |
| 3648 | */ |
Frank Filz | 3f7a87d | 2005-06-20 13:14:57 -0700 | [diff] [blame] | 3649 | SCTP_STATIC int sctp_connect(struct sock *sk, struct sockaddr *addr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3650 | int addr_len) |
| 3651 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3652 | int err = 0; |
Frank Filz | 3f7a87d | 2005-06-20 13:14:57 -0700 | [diff] [blame] | 3653 | struct sctp_af *af; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3654 | |
| 3655 | sctp_lock_sock(sk); |
| 3656 | |
Frank Filz | 3f7a87d | 2005-06-20 13:14:57 -0700 | [diff] [blame] | 3657 | SCTP_DEBUG_PRINTK("%s - sk: %p, sockaddr: %p, addr_len: %d\n", |
Harvey Harrison | 0dc4787 | 2008-03-05 20:47:47 -0800 | [diff] [blame] | 3658 | __func__, sk, addr, addr_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3659 | |
Frank Filz | 3f7a87d | 2005-06-20 13:14:57 -0700 | [diff] [blame] | 3660 | /* Validate addr_len before calling common connect/connectx routine. */ |
| 3661 | af = sctp_get_af_specific(addr->sa_family); |
| 3662 | if (!af || addr_len < af->sockaddr_len) { |
| 3663 | err = -EINVAL; |
| 3664 | } else { |
| 3665 | /* Pass correct addr len to common routine (so it knows there |
| 3666 | * is only one address being passed. |
| 3667 | */ |
Vlad Yasevich | 88a0a94 | 2008-05-09 15:14:11 -0700 | [diff] [blame] | 3668 | err = __sctp_connect(sk, addr, af->sockaddr_len, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3669 | } |
| 3670 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3671 | sctp_release_sock(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3672 | return err; |
| 3673 | } |
| 3674 | |
| 3675 | /* FIXME: Write comments. */ |
| 3676 | SCTP_STATIC int sctp_disconnect(struct sock *sk, int flags) |
| 3677 | { |
| 3678 | return -EOPNOTSUPP; /* STUB */ |
| 3679 | } |
| 3680 | |
| 3681 | /* 4.1.4 accept() - TCP Style Syntax |
| 3682 | * |
| 3683 | * Applications use accept() call to remove an established SCTP |
| 3684 | * association from the accept queue of the endpoint. A new socket |
| 3685 | * descriptor will be returned from accept() to represent the newly |
| 3686 | * formed association. |
| 3687 | */ |
| 3688 | SCTP_STATIC struct sock *sctp_accept(struct sock *sk, int flags, int *err) |
| 3689 | { |
| 3690 | struct sctp_sock *sp; |
| 3691 | struct sctp_endpoint *ep; |
| 3692 | struct sock *newsk = NULL; |
| 3693 | struct sctp_association *asoc; |
| 3694 | long timeo; |
| 3695 | int error = 0; |
| 3696 | |
| 3697 | sctp_lock_sock(sk); |
| 3698 | |
| 3699 | sp = sctp_sk(sk); |
| 3700 | ep = sp->ep; |
| 3701 | |
| 3702 | if (!sctp_style(sk, TCP)) { |
| 3703 | error = -EOPNOTSUPP; |
| 3704 | goto out; |
| 3705 | } |
| 3706 | |
| 3707 | if (!sctp_sstate(sk, LISTENING)) { |
| 3708 | error = -EINVAL; |
| 3709 | goto out; |
| 3710 | } |
| 3711 | |
Sridhar Samudrala | 8abfedd | 2006-08-22 00:24:09 -0700 | [diff] [blame] | 3712 | timeo = sock_rcvtimeo(sk, flags & O_NONBLOCK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3713 | |
| 3714 | error = sctp_wait_for_accept(sk, timeo); |
| 3715 | if (error) |
| 3716 | goto out; |
| 3717 | |
| 3718 | /* We treat the list of associations on the endpoint as the accept |
| 3719 | * queue and pick the first association on the list. |
| 3720 | */ |
| 3721 | asoc = list_entry(ep->asocs.next, struct sctp_association, asocs); |
| 3722 | |
| 3723 | newsk = sp->pf->create_accept_sk(sk, asoc); |
| 3724 | if (!newsk) { |
| 3725 | error = -ENOMEM; |
| 3726 | goto out; |
| 3727 | } |
| 3728 | |
| 3729 | /* Populate the fields of the newsk from the oldsk and migrate the |
| 3730 | * asoc to the newsk. |
| 3731 | */ |
| 3732 | sctp_sock_migrate(sk, newsk, asoc, SCTP_SOCKET_TCP); |
| 3733 | |
| 3734 | out: |
| 3735 | sctp_release_sock(sk); |
YOSHIFUJI Hideaki | d808ad9 | 2007-02-09 23:25:18 +0900 | [diff] [blame] | 3736 | *err = error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3737 | return newsk; |
| 3738 | } |
| 3739 | |
| 3740 | /* The SCTP ioctl handler. */ |
| 3741 | SCTP_STATIC int sctp_ioctl(struct sock *sk, int cmd, unsigned long arg) |
| 3742 | { |
Diego Elio 'Flameeyes' Pettenò | 65040c3 | 2010-09-03 03:47:03 +0000 | [diff] [blame] | 3743 | int rc = -ENOTCONN; |
| 3744 | |
| 3745 | sctp_lock_sock(sk); |
| 3746 | |
| 3747 | /* |
| 3748 | * SEQPACKET-style sockets in LISTENING state are valid, for |
| 3749 | * SCTP, so only discard TCP-style sockets in LISTENING state. |
| 3750 | */ |
| 3751 | if (sctp_style(sk, TCP) && sctp_sstate(sk, LISTENING)) |
| 3752 | goto out; |
| 3753 | |
| 3754 | switch (cmd) { |
| 3755 | case SIOCINQ: { |
| 3756 | struct sk_buff *skb; |
| 3757 | unsigned int amount = 0; |
| 3758 | |
| 3759 | skb = skb_peek(&sk->sk_receive_queue); |
| 3760 | if (skb != NULL) { |
| 3761 | /* |
| 3762 | * We will only return the amount of this packet since |
| 3763 | * that is all that will be read. |
| 3764 | */ |
| 3765 | amount = skb->len; |
| 3766 | } |
| 3767 | rc = put_user(amount, (int __user *)arg); |
Diego Elio 'Flameeyes' Pettenò | 65040c3 | 2010-09-03 03:47:03 +0000 | [diff] [blame] | 3768 | break; |
David S. Miller | 9a7241c | 2010-10-03 22:14:37 -0700 | [diff] [blame] | 3769 | } |
Diego Elio 'Flameeyes' Pettenò | 65040c3 | 2010-09-03 03:47:03 +0000 | [diff] [blame] | 3770 | default: |
| 3771 | rc = -ENOIOCTLCMD; |
| 3772 | break; |
| 3773 | } |
| 3774 | out: |
| 3775 | sctp_release_sock(sk); |
| 3776 | return rc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3777 | } |
| 3778 | |
| 3779 | /* This is the function which gets called during socket creation to |
| 3780 | * initialized the SCTP-specific portion of the sock. |
| 3781 | * The sock structure should already be zero-filled memory. |
| 3782 | */ |
| 3783 | SCTP_STATIC int sctp_init_sock(struct sock *sk) |
| 3784 | { |
| 3785 | struct sctp_endpoint *ep; |
| 3786 | struct sctp_sock *sp; |
| 3787 | |
| 3788 | SCTP_DEBUG_PRINTK("sctp_init_sock(sk: %p)\n", sk); |
| 3789 | |
| 3790 | sp = sctp_sk(sk); |
| 3791 | |
| 3792 | /* Initialize the SCTP per socket area. */ |
| 3793 | switch (sk->sk_type) { |
| 3794 | case SOCK_SEQPACKET: |
| 3795 | sp->type = SCTP_SOCKET_UDP; |
| 3796 | break; |
| 3797 | case SOCK_STREAM: |
| 3798 | sp->type = SCTP_SOCKET_TCP; |
| 3799 | break; |
| 3800 | default: |
| 3801 | return -ESOCKTNOSUPPORT; |
| 3802 | } |
| 3803 | |
| 3804 | /* Initialize default send parameters. These parameters can be |
| 3805 | * modified with the SCTP_DEFAULT_SEND_PARAM socket option. |
| 3806 | */ |
| 3807 | sp->default_stream = 0; |
| 3808 | sp->default_ppid = 0; |
| 3809 | sp->default_flags = 0; |
| 3810 | sp->default_context = 0; |
| 3811 | sp->default_timetolive = 0; |
| 3812 | |
Ivan Skytte Jorgensen | 6ab792f | 2006-12-13 16:34:22 -0800 | [diff] [blame] | 3813 | sp->default_rcv_context = 0; |
Vlad Yasevich | 7033157 | 2007-03-23 11:34:36 -0700 | [diff] [blame] | 3814 | sp->max_burst = sctp_max_burst; |
Ivan Skytte Jorgensen | 6ab792f | 2006-12-13 16:34:22 -0800 | [diff] [blame] | 3815 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3816 | /* Initialize default setup parameters. These parameters |
| 3817 | * can be modified with the SCTP_INITMSG socket option or |
| 3818 | * overridden by the SCTP_INIT CMSG. |
| 3819 | */ |
| 3820 | sp->initmsg.sinit_num_ostreams = sctp_max_outstreams; |
| 3821 | sp->initmsg.sinit_max_instreams = sctp_max_instreams; |
| 3822 | sp->initmsg.sinit_max_attempts = sctp_max_retrans_init; |
Vladislav Yasevich | 3fd091e | 2006-08-22 13:29:17 -0700 | [diff] [blame] | 3823 | sp->initmsg.sinit_max_init_timeo = sctp_rto_max; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3824 | |
| 3825 | /* Initialize default RTO related parameters. These parameters can |
| 3826 | * be modified for with the SCTP_RTOINFO socket option. |
| 3827 | */ |
Vladislav Yasevich | 3fd091e | 2006-08-22 13:29:17 -0700 | [diff] [blame] | 3828 | sp->rtoinfo.srto_initial = sctp_rto_initial; |
| 3829 | sp->rtoinfo.srto_max = sctp_rto_max; |
| 3830 | sp->rtoinfo.srto_min = sctp_rto_min; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3831 | |
| 3832 | /* Initialize default association related parameters. These parameters |
| 3833 | * can be modified with the SCTP_ASSOCINFO socket option. |
| 3834 | */ |
| 3835 | sp->assocparams.sasoc_asocmaxrxt = sctp_max_retrans_association; |
| 3836 | sp->assocparams.sasoc_number_peer_destinations = 0; |
| 3837 | sp->assocparams.sasoc_peer_rwnd = 0; |
| 3838 | sp->assocparams.sasoc_local_rwnd = 0; |
Vladislav Yasevich | 3fd091e | 2006-08-22 13:29:17 -0700 | [diff] [blame] | 3839 | sp->assocparams.sasoc_cookie_life = sctp_valid_cookie_life; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3840 | |
| 3841 | /* Initialize default event subscriptions. By default, all the |
YOSHIFUJI Hideaki | d808ad9 | 2007-02-09 23:25:18 +0900 | [diff] [blame] | 3842 | * options are off. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3843 | */ |
| 3844 | memset(&sp->subscribe, 0, sizeof(struct sctp_event_subscribe)); |
| 3845 | |
| 3846 | /* Default Peer Address Parameters. These defaults can |
| 3847 | * be modified via SCTP_PEER_ADDR_PARAMS |
| 3848 | */ |
Vladislav Yasevich | 3fd091e | 2006-08-22 13:29:17 -0700 | [diff] [blame] | 3849 | sp->hbinterval = sctp_hb_interval; |
Frank Filz | 52ccb8e | 2005-12-22 11:36:46 -0800 | [diff] [blame] | 3850 | sp->pathmaxrxt = sctp_max_retrans_path; |
| 3851 | sp->pathmtu = 0; // allow default discovery |
Vladislav Yasevich | 3fd091e | 2006-08-22 13:29:17 -0700 | [diff] [blame] | 3852 | sp->sackdelay = sctp_sack_timeout; |
Vlad Yasevich | 7bfe8bd | 2008-06-09 15:45:05 -0700 | [diff] [blame] | 3853 | sp->sackfreq = 2; |
Frank Filz | 52ccb8e | 2005-12-22 11:36:46 -0800 | [diff] [blame] | 3854 | sp->param_flags = SPP_HB_ENABLE | |
YOSHIFUJI Hideaki | d808ad9 | 2007-02-09 23:25:18 +0900 | [diff] [blame] | 3855 | SPP_PMTUD_ENABLE | |
| 3856 | SPP_SACKDELAY_ENABLE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3857 | |
| 3858 | /* If enabled no SCTP message fragmentation will be performed. |
| 3859 | * Configure through SCTP_DISABLE_FRAGMENTS socket option. |
| 3860 | */ |
| 3861 | sp->disable_fragments = 0; |
| 3862 | |
Sridhar Samudrala | 208edef | 2006-09-29 17:08:01 -0700 | [diff] [blame] | 3863 | /* Enable Nagle algorithm by default. */ |
| 3864 | sp->nodelay = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3865 | |
| 3866 | /* Enable by default. */ |
| 3867 | sp->v4mapped = 1; |
| 3868 | |
| 3869 | /* Auto-close idle associations after the configured |
| 3870 | * number of seconds. A value of 0 disables this |
| 3871 | * feature. Configure through the SCTP_AUTOCLOSE socket option, |
| 3872 | * for UDP-style sockets only. |
| 3873 | */ |
| 3874 | sp->autoclose = 0; |
| 3875 | |
| 3876 | /* User specified fragmentation limit. */ |
| 3877 | sp->user_frag = 0; |
| 3878 | |
Ivan Skytte Jorgensen | 0f3fffd | 2006-12-20 16:07:04 -0800 | [diff] [blame] | 3879 | sp->adaptation_ind = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3880 | |
| 3881 | sp->pf = sctp_get_pf_specific(sk->sk_family); |
| 3882 | |
| 3883 | /* Control variables for partial data delivery. */ |
Vlad Yasevich | b6e1331 | 2007-04-20 12:23:15 -0700 | [diff] [blame] | 3884 | atomic_set(&sp->pd_mode, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3885 | skb_queue_head_init(&sp->pd_lobby); |
Vlad Yasevich | b6e1331 | 2007-04-20 12:23:15 -0700 | [diff] [blame] | 3886 | sp->frag_interleave = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3887 | |
| 3888 | /* Create a per socket endpoint structure. Even if we |
| 3889 | * change the data structure relationships, this may still |
| 3890 | * be useful for storing pre-connect address information. |
| 3891 | */ |
| 3892 | ep = sctp_endpoint_new(sk, GFP_KERNEL); |
| 3893 | if (!ep) |
| 3894 | return -ENOMEM; |
| 3895 | |
| 3896 | sp->ep = ep; |
| 3897 | sp->hmac = NULL; |
| 3898 | |
| 3899 | SCTP_DBG_OBJCNT_INC(sock); |
David S. Miller | 6f756a8 | 2008-11-23 17:34:03 -0800 | [diff] [blame] | 3900 | |
| 3901 | local_bh_disable(); |
Vlad Yasevich | 81419d8 | 2010-04-28 08:47:20 +0000 | [diff] [blame] | 3902 | percpu_counter_inc(&sctp_sockets_allocated); |
Eric Dumazet | 9a57f7f | 2008-11-17 02:41:00 -0800 | [diff] [blame] | 3903 | sock_prot_inuse_add(sock_net(sk), sk->sk_prot, 1); |
Michio Honda | 9f7d653 | 2011-04-26 19:32:51 +0900 | [diff] [blame] | 3904 | if (sctp_default_auto_asconf) { |
| 3905 | list_add_tail(&sp->auto_asconf_list, |
| 3906 | &sctp_auto_asconf_splist); |
| 3907 | sp->do_auto_asconf = 1; |
| 3908 | } else |
| 3909 | sp->do_auto_asconf = 0; |
David S. Miller | 6f756a8 | 2008-11-23 17:34:03 -0800 | [diff] [blame] | 3910 | local_bh_enable(); |
| 3911 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3912 | return 0; |
| 3913 | } |
| 3914 | |
| 3915 | /* Cleanup any SCTP per socket resources. */ |
Brian Haley | 7d06b2e | 2008-06-14 17:04:49 -0700 | [diff] [blame] | 3916 | SCTP_STATIC void sctp_destroy_sock(struct sock *sk) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3917 | { |
Michio Honda | 9f7d653 | 2011-04-26 19:32:51 +0900 | [diff] [blame] | 3918 | struct sctp_sock *sp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3919 | |
| 3920 | SCTP_DEBUG_PRINTK("sctp_destroy_sock(sk: %p)\n", sk); |
| 3921 | |
| 3922 | /* Release our hold on the endpoint. */ |
Michio Honda | 9f7d653 | 2011-04-26 19:32:51 +0900 | [diff] [blame] | 3923 | sp = sctp_sk(sk); |
| 3924 | if (sp->do_auto_asconf) { |
| 3925 | sp->do_auto_asconf = 0; |
| 3926 | list_del(&sp->auto_asconf_list); |
| 3927 | } |
| 3928 | sctp_endpoint_free(sp->ep); |
Eric Dumazet | 5bc0b3b | 2008-11-25 13:53:27 -0800 | [diff] [blame] | 3929 | local_bh_disable(); |
Vlad Yasevich | 81419d8 | 2010-04-28 08:47:20 +0000 | [diff] [blame] | 3930 | percpu_counter_dec(&sctp_sockets_allocated); |
Eric Dumazet | 9a57f7f | 2008-11-17 02:41:00 -0800 | [diff] [blame] | 3931 | sock_prot_inuse_add(sock_net(sk), sk->sk_prot, -1); |
Eric Dumazet | 5bc0b3b | 2008-11-25 13:53:27 -0800 | [diff] [blame] | 3932 | local_bh_enable(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3933 | } |
| 3934 | |
| 3935 | /* API 4.1.7 shutdown() - TCP Style Syntax |
| 3936 | * int shutdown(int socket, int how); |
| 3937 | * |
| 3938 | * sd - the socket descriptor of the association to be closed. |
| 3939 | * how - Specifies the type of shutdown. The values are |
| 3940 | * as follows: |
| 3941 | * SHUT_RD |
| 3942 | * Disables further receive operations. No SCTP |
| 3943 | * protocol action is taken. |
| 3944 | * SHUT_WR |
| 3945 | * Disables further send operations, and initiates |
| 3946 | * the SCTP shutdown sequence. |
| 3947 | * SHUT_RDWR |
| 3948 | * Disables further send and receive operations |
| 3949 | * and initiates the SCTP shutdown sequence. |
| 3950 | */ |
| 3951 | SCTP_STATIC void sctp_shutdown(struct sock *sk, int how) |
| 3952 | { |
| 3953 | struct sctp_endpoint *ep; |
| 3954 | struct sctp_association *asoc; |
| 3955 | |
| 3956 | if (!sctp_style(sk, TCP)) |
| 3957 | return; |
| 3958 | |
| 3959 | if (how & SEND_SHUTDOWN) { |
| 3960 | ep = sctp_sk(sk)->ep; |
| 3961 | if (!list_empty(&ep->asocs)) { |
| 3962 | asoc = list_entry(ep->asocs.next, |
| 3963 | struct sctp_association, asocs); |
| 3964 | sctp_primitive_SHUTDOWN(asoc, NULL); |
| 3965 | } |
| 3966 | } |
| 3967 | } |
| 3968 | |
| 3969 | /* 7.2.1 Association Status (SCTP_STATUS) |
| 3970 | |
| 3971 | * Applications can retrieve current status information about an |
| 3972 | * association, including association state, peer receiver window size, |
| 3973 | * number of unacked data chunks, and number of data chunks pending |
| 3974 | * receipt. This information is read-only. |
| 3975 | */ |
| 3976 | static int sctp_getsockopt_sctp_status(struct sock *sk, int len, |
| 3977 | char __user *optval, |
| 3978 | int __user *optlen) |
| 3979 | { |
| 3980 | struct sctp_status status; |
| 3981 | struct sctp_association *asoc = NULL; |
| 3982 | struct sctp_transport *transport; |
| 3983 | sctp_assoc_t associd; |
| 3984 | int retval = 0; |
| 3985 | |
Neil Horman | 408f22e | 2007-06-16 14:03:45 -0400 | [diff] [blame] | 3986 | if (len < sizeof(status)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3987 | retval = -EINVAL; |
| 3988 | goto out; |
| 3989 | } |
| 3990 | |
Neil Horman | 408f22e | 2007-06-16 14:03:45 -0400 | [diff] [blame] | 3991 | len = sizeof(status); |
| 3992 | if (copy_from_user(&status, optval, len)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3993 | retval = -EFAULT; |
| 3994 | goto out; |
| 3995 | } |
| 3996 | |
| 3997 | associd = status.sstat_assoc_id; |
| 3998 | asoc = sctp_id2assoc(sk, associd); |
| 3999 | if (!asoc) { |
| 4000 | retval = -EINVAL; |
| 4001 | goto out; |
| 4002 | } |
| 4003 | |
| 4004 | transport = asoc->peer.primary_path; |
| 4005 | |
| 4006 | status.sstat_assoc_id = sctp_assoc2id(asoc); |
| 4007 | status.sstat_state = asoc->state; |
| 4008 | status.sstat_rwnd = asoc->peer.rwnd; |
| 4009 | status.sstat_unackdata = asoc->unack_data; |
| 4010 | |
| 4011 | status.sstat_penddata = sctp_tsnmap_pending(&asoc->peer.tsn_map); |
| 4012 | status.sstat_instrms = asoc->c.sinit_max_instreams; |
| 4013 | status.sstat_outstrms = asoc->c.sinit_num_ostreams; |
| 4014 | status.sstat_fragmentation_point = asoc->frag_point; |
| 4015 | status.sstat_primary.spinfo_assoc_id = sctp_assoc2id(transport->asoc); |
Al Viro | 8cec6b8 | 2006-11-20 17:23:01 -0800 | [diff] [blame] | 4016 | memcpy(&status.sstat_primary.spinfo_address, &transport->ipaddr, |
| 4017 | transport->af_specific->sockaddr_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4018 | /* Map ipv4 address into v4-mapped-on-v6 address. */ |
| 4019 | sctp_get_pf_specific(sk->sk_family)->addr_v4map(sctp_sk(sk), |
| 4020 | (union sctp_addr *)&status.sstat_primary.spinfo_address); |
Frank Filz | 3f7a87d | 2005-06-20 13:14:57 -0700 | [diff] [blame] | 4021 | status.sstat_primary.spinfo_state = transport->state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4022 | status.sstat_primary.spinfo_cwnd = transport->cwnd; |
| 4023 | status.sstat_primary.spinfo_srtt = transport->srtt; |
| 4024 | status.sstat_primary.spinfo_rto = jiffies_to_msecs(transport->rto); |
Frank Filz | 52ccb8e | 2005-12-22 11:36:46 -0800 | [diff] [blame] | 4025 | status.sstat_primary.spinfo_mtu = transport->pathmtu; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4026 | |
Frank Filz | 3f7a87d | 2005-06-20 13:14:57 -0700 | [diff] [blame] | 4027 | if (status.sstat_primary.spinfo_state == SCTP_UNKNOWN) |
| 4028 | status.sstat_primary.spinfo_state = SCTP_ACTIVE; |
| 4029 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4030 | if (put_user(len, optlen)) { |
| 4031 | retval = -EFAULT; |
| 4032 | goto out; |
| 4033 | } |
| 4034 | |
| 4035 | SCTP_DEBUG_PRINTK("sctp_getsockopt_sctp_status(%d): %d %d %d\n", |
| 4036 | len, status.sstat_state, status.sstat_rwnd, |
| 4037 | status.sstat_assoc_id); |
| 4038 | |
| 4039 | if (copy_to_user(optval, &status, len)) { |
| 4040 | retval = -EFAULT; |
| 4041 | goto out; |
| 4042 | } |
| 4043 | |
| 4044 | out: |
Eric Dumazet | a02cec2 | 2010-09-22 20:43:57 +0000 | [diff] [blame] | 4045 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4046 | } |
| 4047 | |
| 4048 | |
| 4049 | /* 7.2.2 Peer Address Information (SCTP_GET_PEER_ADDR_INFO) |
| 4050 | * |
| 4051 | * Applications can retrieve information about a specific peer address |
| 4052 | * of an association, including its reachability state, congestion |
| 4053 | * window, and retransmission timer values. This information is |
| 4054 | * read-only. |
| 4055 | */ |
| 4056 | static int sctp_getsockopt_peer_addr_info(struct sock *sk, int len, |
| 4057 | char __user *optval, |
| 4058 | int __user *optlen) |
| 4059 | { |
| 4060 | struct sctp_paddrinfo pinfo; |
| 4061 | struct sctp_transport *transport; |
| 4062 | int retval = 0; |
| 4063 | |
Neil Horman | 408f22e | 2007-06-16 14:03:45 -0400 | [diff] [blame] | 4064 | if (len < sizeof(pinfo)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4065 | retval = -EINVAL; |
| 4066 | goto out; |
| 4067 | } |
| 4068 | |
Neil Horman | 408f22e | 2007-06-16 14:03:45 -0400 | [diff] [blame] | 4069 | len = sizeof(pinfo); |
| 4070 | if (copy_from_user(&pinfo, optval, len)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4071 | retval = -EFAULT; |
| 4072 | goto out; |
| 4073 | } |
| 4074 | |
| 4075 | transport = sctp_addr_id2transport(sk, &pinfo.spinfo_address, |
| 4076 | pinfo.spinfo_assoc_id); |
| 4077 | if (!transport) |
| 4078 | return -EINVAL; |
| 4079 | |
| 4080 | pinfo.spinfo_assoc_id = sctp_assoc2id(transport->asoc); |
Frank Filz | 3f7a87d | 2005-06-20 13:14:57 -0700 | [diff] [blame] | 4081 | pinfo.spinfo_state = transport->state; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4082 | pinfo.spinfo_cwnd = transport->cwnd; |
| 4083 | pinfo.spinfo_srtt = transport->srtt; |
| 4084 | pinfo.spinfo_rto = jiffies_to_msecs(transport->rto); |
Frank Filz | 52ccb8e | 2005-12-22 11:36:46 -0800 | [diff] [blame] | 4085 | pinfo.spinfo_mtu = transport->pathmtu; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4086 | |
Frank Filz | 3f7a87d | 2005-06-20 13:14:57 -0700 | [diff] [blame] | 4087 | if (pinfo.spinfo_state == SCTP_UNKNOWN) |
| 4088 | pinfo.spinfo_state = SCTP_ACTIVE; |
| 4089 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4090 | if (put_user(len, optlen)) { |
| 4091 | retval = -EFAULT; |
| 4092 | goto out; |
| 4093 | } |
| 4094 | |
| 4095 | if (copy_to_user(optval, &pinfo, len)) { |
| 4096 | retval = -EFAULT; |
| 4097 | goto out; |
| 4098 | } |
| 4099 | |
| 4100 | out: |
Eric Dumazet | a02cec2 | 2010-09-22 20:43:57 +0000 | [diff] [blame] | 4101 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4102 | } |
| 4103 | |
| 4104 | /* 7.1.12 Enable/Disable message fragmentation (SCTP_DISABLE_FRAGMENTS) |
| 4105 | * |
| 4106 | * This option is a on/off flag. If enabled no SCTP message |
| 4107 | * fragmentation will be performed. Instead if a message being sent |
| 4108 | * exceeds the current PMTU size, the message will NOT be sent and |
| 4109 | * instead a error will be indicated to the user. |
| 4110 | */ |
| 4111 | static int sctp_getsockopt_disable_fragments(struct sock *sk, int len, |
| 4112 | char __user *optval, int __user *optlen) |
| 4113 | { |
| 4114 | int val; |
| 4115 | |
| 4116 | if (len < sizeof(int)) |
| 4117 | return -EINVAL; |
| 4118 | |
| 4119 | len = sizeof(int); |
| 4120 | val = (sctp_sk(sk)->disable_fragments == 1); |
| 4121 | if (put_user(len, optlen)) |
| 4122 | return -EFAULT; |
| 4123 | if (copy_to_user(optval, &val, len)) |
| 4124 | return -EFAULT; |
| 4125 | return 0; |
| 4126 | } |
| 4127 | |
| 4128 | /* 7.1.15 Set notification and ancillary events (SCTP_EVENTS) |
| 4129 | * |
| 4130 | * This socket option is used to specify various notifications and |
| 4131 | * ancillary data the user wishes to receive. |
| 4132 | */ |
| 4133 | static int sctp_getsockopt_events(struct sock *sk, int len, char __user *optval, |
| 4134 | int __user *optlen) |
| 4135 | { |
Thomas Graf | acdd598 | 2012-04-03 22:17:53 +0000 | [diff] [blame] | 4136 | if (len <= 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4137 | return -EINVAL; |
Thomas Graf | acdd598 | 2012-04-03 22:17:53 +0000 | [diff] [blame] | 4138 | if (len > sizeof(struct sctp_event_subscribe)) |
| 4139 | len = sizeof(struct sctp_event_subscribe); |
Neil Horman | 408f22e | 2007-06-16 14:03:45 -0400 | [diff] [blame] | 4140 | if (put_user(len, optlen)) |
| 4141 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4142 | if (copy_to_user(optval, &sctp_sk(sk)->subscribe, len)) |
| 4143 | return -EFAULT; |
| 4144 | return 0; |
| 4145 | } |
| 4146 | |
| 4147 | /* 7.1.8 Automatic Close of associations (SCTP_AUTOCLOSE) |
| 4148 | * |
| 4149 | * This socket option is applicable to the UDP-style socket only. When |
| 4150 | * set it will cause associations that are idle for more than the |
| 4151 | * specified number of seconds to automatically close. An association |
| 4152 | * being idle is defined an association that has NOT sent or received |
| 4153 | * user data. The special value of '0' indicates that no automatic |
| 4154 | * close of any associations should be performed. The option expects an |
| 4155 | * integer defining the number of seconds of idle time before an |
| 4156 | * association is closed. |
| 4157 | */ |
| 4158 | static int sctp_getsockopt_autoclose(struct sock *sk, int len, char __user *optval, int __user *optlen) |
| 4159 | { |
| 4160 | /* Applicable to UDP-style socket only */ |
| 4161 | if (sctp_style(sk, TCP)) |
| 4162 | return -EOPNOTSUPP; |
Neil Horman | 408f22e | 2007-06-16 14:03:45 -0400 | [diff] [blame] | 4163 | if (len < sizeof(int)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4164 | return -EINVAL; |
Neil Horman | 408f22e | 2007-06-16 14:03:45 -0400 | [diff] [blame] | 4165 | len = sizeof(int); |
| 4166 | if (put_user(len, optlen)) |
| 4167 | return -EFAULT; |
| 4168 | if (copy_to_user(optval, &sctp_sk(sk)->autoclose, sizeof(int))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4169 | return -EFAULT; |
| 4170 | return 0; |
| 4171 | } |
| 4172 | |
| 4173 | /* Helper routine to branch off an association to a new socket. */ |
Benjamin Poirier | 0343c55 | 2012-03-08 05:55:58 +0000 | [diff] [blame] | 4174 | int sctp_do_peeloff(struct sock *sk, sctp_assoc_t id, struct socket **sockp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4175 | { |
Benjamin Poirier | 0343c55 | 2012-03-08 05:55:58 +0000 | [diff] [blame] | 4176 | struct sctp_association *asoc = sctp_id2assoc(sk, id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4177 | struct socket *sock; |
Vlad Yasevich | d570ee4 | 2007-05-15 16:32:39 -0400 | [diff] [blame] | 4178 | struct sctp_af *af; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4179 | int err = 0; |
| 4180 | |
Benjamin Poirier | 0343c55 | 2012-03-08 05:55:58 +0000 | [diff] [blame] | 4181 | if (!asoc) |
| 4182 | return -EINVAL; |
| 4183 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4184 | /* An association cannot be branched off from an already peeled-off |
| 4185 | * socket, nor is this supported for tcp style sockets. |
| 4186 | */ |
| 4187 | if (!sctp_style(sk, UDP)) |
| 4188 | return -EINVAL; |
| 4189 | |
| 4190 | /* Create a new socket. */ |
| 4191 | err = sock_create(sk->sk_family, SOCK_SEQPACKET, IPPROTO_SCTP, &sock); |
| 4192 | if (err < 0) |
| 4193 | return err; |
| 4194 | |
Vlad Yasevich | 914e1c8 | 2009-02-13 08:33:44 +0000 | [diff] [blame] | 4195 | sctp_copy_sock(sock->sk, sk, asoc); |
Vlad Yasevich | 4f44430 | 2006-10-30 18:54:32 -0800 | [diff] [blame] | 4196 | |
| 4197 | /* Make peeled-off sockets more like 1-1 accepted sockets. |
| 4198 | * Set the daddr and initialize id to something more random |
| 4199 | */ |
Vlad Yasevich | d570ee4 | 2007-05-15 16:32:39 -0400 | [diff] [blame] | 4200 | af = sctp_get_af_specific(asoc->peer.primary_addr.sa.sa_family); |
| 4201 | af->to_sk_daddr(&asoc->peer.primary_addr, sk); |
Vlad Yasevich | 914e1c8 | 2009-02-13 08:33:44 +0000 | [diff] [blame] | 4202 | |
| 4203 | /* Populate the fields of the newsk from the oldsk and migrate the |
| 4204 | * asoc to the newsk. |
| 4205 | */ |
| 4206 | sctp_sock_migrate(sk, sock->sk, asoc, SCTP_SOCKET_UDP_HIGH_BANDWIDTH); |
Vlad Yasevich | 4f44430 | 2006-10-30 18:54:32 -0800 | [diff] [blame] | 4207 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4208 | *sockp = sock; |
| 4209 | |
| 4210 | return err; |
| 4211 | } |
Benjamin Poirier | 0343c55 | 2012-03-08 05:55:58 +0000 | [diff] [blame] | 4212 | EXPORT_SYMBOL(sctp_do_peeloff); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4213 | |
| 4214 | static int sctp_getsockopt_peeloff(struct sock *sk, int len, char __user *optval, int __user *optlen) |
| 4215 | { |
| 4216 | sctp_peeloff_arg_t peeloff; |
| 4217 | struct socket *newsock; |
| 4218 | int retval = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4219 | |
Neil Horman | 408f22e | 2007-06-16 14:03:45 -0400 | [diff] [blame] | 4220 | if (len < sizeof(sctp_peeloff_arg_t)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4221 | return -EINVAL; |
Neil Horman | 408f22e | 2007-06-16 14:03:45 -0400 | [diff] [blame] | 4222 | len = sizeof(sctp_peeloff_arg_t); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4223 | if (copy_from_user(&peeloff, optval, len)) |
| 4224 | return -EFAULT; |
| 4225 | |
Benjamin Poirier | 0343c55 | 2012-03-08 05:55:58 +0000 | [diff] [blame] | 4226 | retval = sctp_do_peeloff(sk, peeloff.associd, &newsock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4227 | if (retval < 0) |
| 4228 | goto out; |
| 4229 | |
| 4230 | /* Map the socket to an unused fd that can be returned to the user. */ |
Ulrich Drepper | a677a03 | 2008-07-23 21:29:17 -0700 | [diff] [blame] | 4231 | retval = sock_map_fd(newsock, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4232 | if (retval < 0) { |
| 4233 | sock_release(newsock); |
| 4234 | goto out; |
| 4235 | } |
| 4236 | |
Benjamin Poirier | 0343c55 | 2012-03-08 05:55:58 +0000 | [diff] [blame] | 4237 | SCTP_DEBUG_PRINTK("%s: sk: %p newsk: %p sd: %d\n", |
| 4238 | __func__, sk, newsock->sk, retval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4239 | |
| 4240 | /* Return the fd mapped to the new socket. */ |
| 4241 | peeloff.sd = retval; |
Neil Horman | 408f22e | 2007-06-16 14:03:45 -0400 | [diff] [blame] | 4242 | if (put_user(len, optlen)) |
| 4243 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4244 | if (copy_to_user(optval, &peeloff, len)) |
| 4245 | retval = -EFAULT; |
| 4246 | |
| 4247 | out: |
| 4248 | return retval; |
| 4249 | } |
| 4250 | |
| 4251 | /* 7.1.13 Peer Address Parameters (SCTP_PEER_ADDR_PARAMS) |
| 4252 | * |
| 4253 | * Applications can enable or disable heartbeats for any peer address of |
| 4254 | * an association, modify an address's heartbeat interval, force a |
| 4255 | * heartbeat to be sent immediately, and adjust the address's maximum |
| 4256 | * number of retransmissions sent before an address is considered |
| 4257 | * unreachable. The following structure is used to access and modify an |
| 4258 | * address's parameters: |
| 4259 | * |
| 4260 | * struct sctp_paddrparams { |
Frank Filz | 52ccb8e | 2005-12-22 11:36:46 -0800 | [diff] [blame] | 4261 | * sctp_assoc_t spp_assoc_id; |
| 4262 | * struct sockaddr_storage spp_address; |
| 4263 | * uint32_t spp_hbinterval; |
| 4264 | * uint16_t spp_pathmaxrxt; |
| 4265 | * uint32_t spp_pathmtu; |
| 4266 | * uint32_t spp_sackdelay; |
| 4267 | * uint32_t spp_flags; |
| 4268 | * }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4269 | * |
Frank Filz | 52ccb8e | 2005-12-22 11:36:46 -0800 | [diff] [blame] | 4270 | * spp_assoc_id - (one-to-many style socket) This is filled in the |
| 4271 | * application, and identifies the association for |
| 4272 | * this query. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4273 | * spp_address - This specifies which address is of interest. |
| 4274 | * spp_hbinterval - This contains the value of the heartbeat interval, |
Frank Filz | 52ccb8e | 2005-12-22 11:36:46 -0800 | [diff] [blame] | 4275 | * in milliseconds. If a value of zero |
| 4276 | * is present in this field then no changes are to |
| 4277 | * be made to this parameter. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4278 | * spp_pathmaxrxt - This contains the maximum number of |
| 4279 | * retransmissions before this address shall be |
Frank Filz | 52ccb8e | 2005-12-22 11:36:46 -0800 | [diff] [blame] | 4280 | * considered unreachable. If a value of zero |
| 4281 | * is present in this field then no changes are to |
| 4282 | * be made to this parameter. |
| 4283 | * spp_pathmtu - When Path MTU discovery is disabled the value |
| 4284 | * specified here will be the "fixed" path mtu. |
| 4285 | * Note that if the spp_address field is empty |
| 4286 | * then all associations on this address will |
| 4287 | * have this fixed path mtu set upon them. |
| 4288 | * |
| 4289 | * spp_sackdelay - When delayed sack is enabled, this value specifies |
| 4290 | * the number of milliseconds that sacks will be delayed |
| 4291 | * for. This value will apply to all addresses of an |
| 4292 | * association if the spp_address field is empty. Note |
| 4293 | * also, that if delayed sack is enabled and this |
| 4294 | * value is set to 0, no change is made to the last |
| 4295 | * recorded delayed sack timer value. |
| 4296 | * |
| 4297 | * spp_flags - These flags are used to control various features |
| 4298 | * on an association. The flag field may contain |
| 4299 | * zero or more of the following options. |
| 4300 | * |
| 4301 | * SPP_HB_ENABLE - Enable heartbeats on the |
| 4302 | * specified address. Note that if the address |
| 4303 | * field is empty all addresses for the association |
| 4304 | * have heartbeats enabled upon them. |
| 4305 | * |
| 4306 | * SPP_HB_DISABLE - Disable heartbeats on the |
| 4307 | * speicifed address. Note that if the address |
| 4308 | * field is empty all addresses for the association |
| 4309 | * will have their heartbeats disabled. Note also |
| 4310 | * that SPP_HB_ENABLE and SPP_HB_DISABLE are |
| 4311 | * mutually exclusive, only one of these two should |
| 4312 | * be specified. Enabling both fields will have |
| 4313 | * undetermined results. |
| 4314 | * |
| 4315 | * SPP_HB_DEMAND - Request a user initiated heartbeat |
| 4316 | * to be made immediately. |
| 4317 | * |
| 4318 | * SPP_PMTUD_ENABLE - This field will enable PMTU |
| 4319 | * discovery upon the specified address. Note that |
| 4320 | * if the address feild is empty then all addresses |
| 4321 | * on the association are effected. |
| 4322 | * |
| 4323 | * SPP_PMTUD_DISABLE - This field will disable PMTU |
| 4324 | * discovery upon the specified address. Note that |
| 4325 | * if the address feild is empty then all addresses |
| 4326 | * on the association are effected. Not also that |
| 4327 | * SPP_PMTUD_ENABLE and SPP_PMTUD_DISABLE are mutually |
| 4328 | * exclusive. Enabling both will have undetermined |
| 4329 | * results. |
| 4330 | * |
| 4331 | * SPP_SACKDELAY_ENABLE - Setting this flag turns |
| 4332 | * on delayed sack. The time specified in spp_sackdelay |
| 4333 | * is used to specify the sack delay for this address. Note |
| 4334 | * that if spp_address is empty then all addresses will |
| 4335 | * enable delayed sack and take on the sack delay |
| 4336 | * value specified in spp_sackdelay. |
| 4337 | * SPP_SACKDELAY_DISABLE - Setting this flag turns |
| 4338 | * off delayed sack. If the spp_address field is blank then |
| 4339 | * delayed sack is disabled for the entire association. Note |
| 4340 | * also that this field is mutually exclusive to |
| 4341 | * SPP_SACKDELAY_ENABLE, setting both will have undefined |
| 4342 | * results. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4343 | */ |
| 4344 | static int sctp_getsockopt_peer_addr_params(struct sock *sk, int len, |
Frank Filz | 52ccb8e | 2005-12-22 11:36:46 -0800 | [diff] [blame] | 4345 | char __user *optval, int __user *optlen) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4346 | { |
Frank Filz | 52ccb8e | 2005-12-22 11:36:46 -0800 | [diff] [blame] | 4347 | struct sctp_paddrparams params; |
| 4348 | struct sctp_transport *trans = NULL; |
| 4349 | struct sctp_association *asoc = NULL; |
| 4350 | struct sctp_sock *sp = sctp_sk(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4351 | |
Neil Horman | 408f22e | 2007-06-16 14:03:45 -0400 | [diff] [blame] | 4352 | if (len < sizeof(struct sctp_paddrparams)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4353 | return -EINVAL; |
Neil Horman | 408f22e | 2007-06-16 14:03:45 -0400 | [diff] [blame] | 4354 | len = sizeof(struct sctp_paddrparams); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4355 | if (copy_from_user(¶ms, optval, len)) |
| 4356 | return -EFAULT; |
| 4357 | |
Frank Filz | 52ccb8e | 2005-12-22 11:36:46 -0800 | [diff] [blame] | 4358 | /* If an address other than INADDR_ANY is specified, and |
| 4359 | * no transport is found, then the request is invalid. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4360 | */ |
Vlad Yasevich | 52cae8f | 2008-08-18 10:34:34 -0400 | [diff] [blame] | 4361 | if (!sctp_is_any(sk, ( union sctp_addr *)¶ms.spp_address)) { |
Frank Filz | 52ccb8e | 2005-12-22 11:36:46 -0800 | [diff] [blame] | 4362 | trans = sctp_addr_id2transport(sk, ¶ms.spp_address, |
| 4363 | params.spp_assoc_id); |
| 4364 | if (!trans) { |
| 4365 | SCTP_DEBUG_PRINTK("Failed no transport\n"); |
| 4366 | return -EINVAL; |
| 4367 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4368 | } |
| 4369 | |
Frank Filz | 52ccb8e | 2005-12-22 11:36:46 -0800 | [diff] [blame] | 4370 | /* Get association, if assoc_id != 0 and the socket is a one |
| 4371 | * to many style socket, and an association was not found, then |
| 4372 | * the id was invalid. |
| 4373 | */ |
| 4374 | asoc = sctp_id2assoc(sk, params.spp_assoc_id); |
| 4375 | if (!asoc && params.spp_assoc_id && sctp_style(sk, UDP)) { |
| 4376 | SCTP_DEBUG_PRINTK("Failed no association\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4377 | return -EINVAL; |
Frank Filz | 52ccb8e | 2005-12-22 11:36:46 -0800 | [diff] [blame] | 4378 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4379 | |
Frank Filz | 52ccb8e | 2005-12-22 11:36:46 -0800 | [diff] [blame] | 4380 | if (trans) { |
| 4381 | /* Fetch transport values. */ |
| 4382 | params.spp_hbinterval = jiffies_to_msecs(trans->hbinterval); |
| 4383 | params.spp_pathmtu = trans->pathmtu; |
| 4384 | params.spp_pathmaxrxt = trans->pathmaxrxt; |
| 4385 | params.spp_sackdelay = jiffies_to_msecs(trans->sackdelay); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4386 | |
Frank Filz | 52ccb8e | 2005-12-22 11:36:46 -0800 | [diff] [blame] | 4387 | /*draft-11 doesn't say what to return in spp_flags*/ |
| 4388 | params.spp_flags = trans->param_flags; |
| 4389 | } else if (asoc) { |
| 4390 | /* Fetch association values. */ |
| 4391 | params.spp_hbinterval = jiffies_to_msecs(asoc->hbinterval); |
| 4392 | params.spp_pathmtu = asoc->pathmtu; |
| 4393 | params.spp_pathmaxrxt = asoc->pathmaxrxt; |
| 4394 | params.spp_sackdelay = jiffies_to_msecs(asoc->sackdelay); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4395 | |
Frank Filz | 52ccb8e | 2005-12-22 11:36:46 -0800 | [diff] [blame] | 4396 | /*draft-11 doesn't say what to return in spp_flags*/ |
| 4397 | params.spp_flags = asoc->param_flags; |
| 4398 | } else { |
| 4399 | /* Fetch socket values. */ |
| 4400 | params.spp_hbinterval = sp->hbinterval; |
| 4401 | params.spp_pathmtu = sp->pathmtu; |
| 4402 | params.spp_sackdelay = sp->sackdelay; |
| 4403 | params.spp_pathmaxrxt = sp->pathmaxrxt; |
| 4404 | |
| 4405 | /*draft-11 doesn't say what to return in spp_flags*/ |
| 4406 | params.spp_flags = sp->param_flags; |
| 4407 | } |
| 4408 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4409 | if (copy_to_user(optval, ¶ms, len)) |
| 4410 | return -EFAULT; |
| 4411 | |
| 4412 | if (put_user(len, optlen)) |
| 4413 | return -EFAULT; |
| 4414 | |
| 4415 | return 0; |
| 4416 | } |
| 4417 | |
Wei Yongjun | d364d92 | 2008-05-09 15:13:26 -0700 | [diff] [blame] | 4418 | /* |
| 4419 | * 7.1.23. Get or set delayed ack timer (SCTP_DELAYED_SACK) |
Frank Filz | 7708610 | 2005-12-22 11:37:30 -0800 | [diff] [blame] | 4420 | * |
Wei Yongjun | d364d92 | 2008-05-09 15:13:26 -0700 | [diff] [blame] | 4421 | * This option will effect the way delayed acks are performed. This |
| 4422 | * option allows you to get or set the delayed ack time, in |
| 4423 | * milliseconds. It also allows changing the delayed ack frequency. |
| 4424 | * Changing the frequency to 1 disables the delayed sack algorithm. If |
| 4425 | * the assoc_id is 0, then this sets or gets the endpoints default |
| 4426 | * values. If the assoc_id field is non-zero, then the set or get |
| 4427 | * effects the specified association for the one to many model (the |
| 4428 | * assoc_id field is ignored by the one to one model). Note that if |
| 4429 | * sack_delay or sack_freq are 0 when setting this option, then the |
| 4430 | * current values will remain unchanged. |
Frank Filz | 7708610 | 2005-12-22 11:37:30 -0800 | [diff] [blame] | 4431 | * |
Wei Yongjun | d364d92 | 2008-05-09 15:13:26 -0700 | [diff] [blame] | 4432 | * struct sctp_sack_info { |
| 4433 | * sctp_assoc_t sack_assoc_id; |
| 4434 | * uint32_t sack_delay; |
| 4435 | * uint32_t sack_freq; |
| 4436 | * }; |
Frank Filz | 7708610 | 2005-12-22 11:37:30 -0800 | [diff] [blame] | 4437 | * |
Wei Yongjun | d364d92 | 2008-05-09 15:13:26 -0700 | [diff] [blame] | 4438 | * sack_assoc_id - This parameter, indicates which association the user |
| 4439 | * is performing an action upon. Note that if this field's value is |
| 4440 | * zero then the endpoints default value is changed (effecting future |
| 4441 | * associations only). |
Frank Filz | 7708610 | 2005-12-22 11:37:30 -0800 | [diff] [blame] | 4442 | * |
Wei Yongjun | d364d92 | 2008-05-09 15:13:26 -0700 | [diff] [blame] | 4443 | * sack_delay - This parameter contains the number of milliseconds that |
| 4444 | * the user is requesting the delayed ACK timer be set to. Note that |
| 4445 | * this value is defined in the standard to be between 200 and 500 |
| 4446 | * milliseconds. |
Frank Filz | 7708610 | 2005-12-22 11:37:30 -0800 | [diff] [blame] | 4447 | * |
Wei Yongjun | d364d92 | 2008-05-09 15:13:26 -0700 | [diff] [blame] | 4448 | * sack_freq - This parameter contains the number of packets that must |
| 4449 | * be received before a sack is sent without waiting for the delay |
| 4450 | * timer to expire. The default value for this is 2, setting this |
| 4451 | * value to 1 will disable the delayed sack algorithm. |
Frank Filz | 7708610 | 2005-12-22 11:37:30 -0800 | [diff] [blame] | 4452 | */ |
Wei Yongjun | d364d92 | 2008-05-09 15:13:26 -0700 | [diff] [blame] | 4453 | static int sctp_getsockopt_delayed_ack(struct sock *sk, int len, |
Frank Filz | 7708610 | 2005-12-22 11:37:30 -0800 | [diff] [blame] | 4454 | char __user *optval, |
| 4455 | int __user *optlen) |
| 4456 | { |
Wei Yongjun | d364d92 | 2008-05-09 15:13:26 -0700 | [diff] [blame] | 4457 | struct sctp_sack_info params; |
Frank Filz | 7708610 | 2005-12-22 11:37:30 -0800 | [diff] [blame] | 4458 | struct sctp_association *asoc = NULL; |
| 4459 | struct sctp_sock *sp = sctp_sk(sk); |
| 4460 | |
Wei Yongjun | d364d92 | 2008-05-09 15:13:26 -0700 | [diff] [blame] | 4461 | if (len >= sizeof(struct sctp_sack_info)) { |
| 4462 | len = sizeof(struct sctp_sack_info); |
| 4463 | |
| 4464 | if (copy_from_user(¶ms, optval, len)) |
| 4465 | return -EFAULT; |
| 4466 | } else if (len == sizeof(struct sctp_assoc_value)) { |
Joe Perches | 145ce50 | 2010-08-24 13:21:08 +0000 | [diff] [blame] | 4467 | pr_warn("Use of struct sctp_assoc_value in delayed_ack socket option deprecated\n"); |
| 4468 | pr_warn("Use struct sctp_sack_info instead\n"); |
Wei Yongjun | d364d92 | 2008-05-09 15:13:26 -0700 | [diff] [blame] | 4469 | if (copy_from_user(¶ms, optval, len)) |
| 4470 | return -EFAULT; |
| 4471 | } else |
Frank Filz | 7708610 | 2005-12-22 11:37:30 -0800 | [diff] [blame] | 4472 | return - EINVAL; |
| 4473 | |
Wei Yongjun | d364d92 | 2008-05-09 15:13:26 -0700 | [diff] [blame] | 4474 | /* Get association, if sack_assoc_id != 0 and the socket is a one |
Frank Filz | 7708610 | 2005-12-22 11:37:30 -0800 | [diff] [blame] | 4475 | * to many style socket, and an association was not found, then |
| 4476 | * the id was invalid. |
YOSHIFUJI Hideaki | d808ad9 | 2007-02-09 23:25:18 +0900 | [diff] [blame] | 4477 | */ |
Wei Yongjun | d364d92 | 2008-05-09 15:13:26 -0700 | [diff] [blame] | 4478 | asoc = sctp_id2assoc(sk, params.sack_assoc_id); |
| 4479 | if (!asoc && params.sack_assoc_id && sctp_style(sk, UDP)) |
Frank Filz | 7708610 | 2005-12-22 11:37:30 -0800 | [diff] [blame] | 4480 | return -EINVAL; |
| 4481 | |
| 4482 | if (asoc) { |
| 4483 | /* Fetch association values. */ |
Wei Yongjun | d364d92 | 2008-05-09 15:13:26 -0700 | [diff] [blame] | 4484 | if (asoc->param_flags & SPP_SACKDELAY_ENABLE) { |
| 4485 | params.sack_delay = jiffies_to_msecs( |
Frank Filz | 7708610 | 2005-12-22 11:37:30 -0800 | [diff] [blame] | 4486 | asoc->sackdelay); |
Wei Yongjun | d364d92 | 2008-05-09 15:13:26 -0700 | [diff] [blame] | 4487 | params.sack_freq = asoc->sackfreq; |
| 4488 | |
| 4489 | } else { |
| 4490 | params.sack_delay = 0; |
| 4491 | params.sack_freq = 1; |
| 4492 | } |
Frank Filz | 7708610 | 2005-12-22 11:37:30 -0800 | [diff] [blame] | 4493 | } else { |
| 4494 | /* Fetch socket values. */ |
Wei Yongjun | d364d92 | 2008-05-09 15:13:26 -0700 | [diff] [blame] | 4495 | if (sp->param_flags & SPP_SACKDELAY_ENABLE) { |
| 4496 | params.sack_delay = sp->sackdelay; |
| 4497 | params.sack_freq = sp->sackfreq; |
| 4498 | } else { |
| 4499 | params.sack_delay = 0; |
| 4500 | params.sack_freq = 1; |
| 4501 | } |
Frank Filz | 7708610 | 2005-12-22 11:37:30 -0800 | [diff] [blame] | 4502 | } |
| 4503 | |
| 4504 | if (copy_to_user(optval, ¶ms, len)) |
| 4505 | return -EFAULT; |
| 4506 | |
| 4507 | if (put_user(len, optlen)) |
| 4508 | return -EFAULT; |
| 4509 | |
| 4510 | return 0; |
| 4511 | } |
| 4512 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4513 | /* 7.1.3 Initialization Parameters (SCTP_INITMSG) |
| 4514 | * |
| 4515 | * Applications can specify protocol parameters for the default association |
| 4516 | * initialization. The option name argument to setsockopt() and getsockopt() |
| 4517 | * is SCTP_INITMSG. |
| 4518 | * |
| 4519 | * Setting initialization parameters is effective only on an unconnected |
| 4520 | * socket (for UDP-style sockets only future associations are effected |
| 4521 | * by the change). With TCP-style sockets, this option is inherited by |
| 4522 | * sockets derived from a listener socket. |
| 4523 | */ |
| 4524 | static int sctp_getsockopt_initmsg(struct sock *sk, int len, char __user *optval, int __user *optlen) |
| 4525 | { |
Neil Horman | 408f22e | 2007-06-16 14:03:45 -0400 | [diff] [blame] | 4526 | if (len < sizeof(struct sctp_initmsg)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4527 | return -EINVAL; |
Neil Horman | 408f22e | 2007-06-16 14:03:45 -0400 | [diff] [blame] | 4528 | len = sizeof(struct sctp_initmsg); |
| 4529 | if (put_user(len, optlen)) |
| 4530 | return -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4531 | if (copy_to_user(optval, &sctp_sk(sk)->initmsg, len)) |
| 4532 | return -EFAULT; |
| 4533 | return 0; |
| 4534 | } |
| 4535 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4536 | |
Ivan Skytte Jørgensen | 5fe467e | 2005-10-06 21:36:17 -0700 | [diff] [blame] | 4537 | static int sctp_getsockopt_peer_addrs(struct sock *sk, int len, |
| 4538 | char __user *optval, int __user *optlen) |
| 4539 | { |
| 4540 | struct sctp_association *asoc; |
Ivan Skytte Jørgensen | 5fe467e | 2005-10-06 21:36:17 -0700 | [diff] [blame] | 4541 | int cnt = 0; |
| 4542 | struct sctp_getaddrs getaddrs; |
| 4543 | struct sctp_transport *from; |
| 4544 | void __user *to; |
| 4545 | union sctp_addr temp; |
| 4546 | struct sctp_sock *sp = sctp_sk(sk); |
| 4547 | int addrlen; |
| 4548 | size_t space_left; |
| 4549 | int bytes_copied; |
| 4550 | |
| 4551 | if (len < sizeof(struct sctp_getaddrs)) |
| 4552 | return -EINVAL; |
| 4553 | |
| 4554 | if (copy_from_user(&getaddrs, optval, sizeof(struct sctp_getaddrs))) |
| 4555 | return -EFAULT; |
| 4556 | |
| 4557 | /* For UDP-style sockets, id specifies the association to query. */ |
| 4558 | asoc = sctp_id2assoc(sk, getaddrs.assoc_id); |
| 4559 | if (!asoc) |
| 4560 | return -EINVAL; |
| 4561 | |
| 4562 | to = optval + offsetof(struct sctp_getaddrs,addrs); |
Neil Horman | 186e234 | 2007-06-18 19:59:16 -0400 | [diff] [blame] | 4563 | space_left = len - offsetof(struct sctp_getaddrs,addrs); |
Ivan Skytte Jørgensen | 5fe467e | 2005-10-06 21:36:17 -0700 | [diff] [blame] | 4564 | |
Robert P. J. Day | 9dbc15f | 2008-04-12 18:54:24 -0700 | [diff] [blame] | 4565 | list_for_each_entry(from, &asoc->peer.transport_addr_list, |
| 4566 | transports) { |
Al Viro | b3f5b3b | 2006-11-20 17:22:43 -0800 | [diff] [blame] | 4567 | memcpy(&temp, &from->ipaddr, sizeof(temp)); |
Ivan Skytte Jørgensen | 5fe467e | 2005-10-06 21:36:17 -0700 | [diff] [blame] | 4568 | sctp_get_pf_specific(sk->sk_family)->addr_v4map(sp, &temp); |
Vlad Yasevich | a5f4cea | 2010-04-30 21:42:42 -0400 | [diff] [blame] | 4569 | addrlen = sctp_get_af_specific(temp.sa.sa_family)->sockaddr_len; |
Vlad Yasevich | aad97f3 | 2007-04-28 21:09:04 -0700 | [diff] [blame] | 4570 | if (space_left < addrlen) |
Ivan Skytte Jørgensen | 5fe467e | 2005-10-06 21:36:17 -0700 | [diff] [blame] | 4571 | return -ENOMEM; |
Ivan Skytte Jørgensen | 5fe467e | 2005-10-06 21:36:17 -0700 | [diff] [blame] | 4572 | if (copy_to_user(to, &temp, addrlen)) |
| 4573 | return -EFAULT; |
| 4574 | to += addrlen; |
| 4575 | cnt++; |
| 4576 | space_left -= addrlen; |
| 4577 | } |
| 4578 | |
| 4579 | if (put_user(cnt, &((struct sctp_getaddrs __user *)optval)->addr_num)) |
| 4580 | return -EFAULT; |
| 4581 | bytes_copied = ((char __user *)to) - optval; |
| 4582 | if (put_user(bytes_copied, optlen)) |
| 4583 | return -EFAULT; |
| 4584 | |
| 4585 | return 0; |
| 4586 | } |
| 4587 | |
Vlad Yasevich | aad97f3 | 2007-04-28 21:09:04 -0700 | [diff] [blame] | 4588 | static int sctp_copy_laddrs(struct sock *sk, __u16 port, void *to, |
| 4589 | size_t space_left, int *bytes_copied) |
Ivan Skytte Jørgensen | 5fe467e | 2005-10-06 21:36:17 -0700 | [diff] [blame] | 4590 | { |
Ivan Skytte Jørgensen | 5fe467e | 2005-10-06 21:36:17 -0700 | [diff] [blame] | 4591 | struct sctp_sockaddr_entry *addr; |
Ivan Skytte Jørgensen | 5fe467e | 2005-10-06 21:36:17 -0700 | [diff] [blame] | 4592 | union sctp_addr temp; |
| 4593 | int cnt = 0; |
| 4594 | int addrlen; |
| 4595 | |
Vlad Yasevich | 2930354 | 2007-09-16 16:02:12 -0700 | [diff] [blame] | 4596 | rcu_read_lock(); |
| 4597 | list_for_each_entry_rcu(addr, &sctp_local_addr_list, list) { |
| 4598 | if (!addr->valid) |
| 4599 | continue; |
| 4600 | |
YOSHIFUJI Hideaki | d808ad9 | 2007-02-09 23:25:18 +0900 | [diff] [blame] | 4601 | if ((PF_INET == sk->sk_family) && |
Al Viro | 6244be4 | 2006-11-20 17:21:44 -0800 | [diff] [blame] | 4602 | (AF_INET6 == addr->a.sa.sa_family)) |
Ivan Skytte Jørgensen | 5fe467e | 2005-10-06 21:36:17 -0700 | [diff] [blame] | 4603 | continue; |
Vlad Yasevich | 7dab83d | 2008-07-18 23:05:40 -0700 | [diff] [blame] | 4604 | if ((PF_INET6 == sk->sk_family) && |
| 4605 | inet_v6_ipv6only(sk) && |
| 4606 | (AF_INET == addr->a.sa.sa_family)) |
| 4607 | continue; |
Al Viro | 6244be4 | 2006-11-20 17:21:44 -0800 | [diff] [blame] | 4608 | memcpy(&temp, &addr->a, sizeof(temp)); |
Vlad Yasevich | b46ae36 | 2008-01-28 14:25:36 -0500 | [diff] [blame] | 4609 | if (!temp.v4.sin_port) |
| 4610 | temp.v4.sin_port = htons(port); |
| 4611 | |
Ivan Skytte Jørgensen | 5fe467e | 2005-10-06 21:36:17 -0700 | [diff] [blame] | 4612 | sctp_get_pf_specific(sk->sk_family)->addr_v4map(sctp_sk(sk), |
| 4613 | &temp); |
| 4614 | addrlen = sctp_get_af_specific(temp.sa.sa_family)->sockaddr_len; |
Vlad Yasevich | 2930354 | 2007-09-16 16:02:12 -0700 | [diff] [blame] | 4615 | if (space_left < addrlen) { |
| 4616 | cnt = -ENOMEM; |
| 4617 | break; |
| 4618 | } |
Vlad Yasevich | aad97f3 | 2007-04-28 21:09:04 -0700 | [diff] [blame] | 4619 | memcpy(to, &temp, addrlen); |
Sridhar Samudrala | 29c7cf9 | 2006-12-13 16:26:26 -0800 | [diff] [blame] | 4620 | |
Vlad Yasevich | aad97f3 | 2007-04-28 21:09:04 -0700 | [diff] [blame] | 4621 | to += addrlen; |
Ivan Skytte Jørgensen | 5fe467e | 2005-10-06 21:36:17 -0700 | [diff] [blame] | 4622 | cnt ++; |
| 4623 | space_left -= addrlen; |
Vlad Yasevich | 3663c30 | 2007-07-03 12:43:12 -0400 | [diff] [blame] | 4624 | *bytes_copied += addrlen; |
Ivan Skytte Jørgensen | 5fe467e | 2005-10-06 21:36:17 -0700 | [diff] [blame] | 4625 | } |
Vlad Yasevich | 2930354 | 2007-09-16 16:02:12 -0700 | [diff] [blame] | 4626 | rcu_read_unlock(); |
Ivan Skytte Jørgensen | 5fe467e | 2005-10-06 21:36:17 -0700 | [diff] [blame] | 4627 | |
| 4628 | return cnt; |
| 4629 | } |
| 4630 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4631 | |
Ivan Skytte Jørgensen | 5fe467e | 2005-10-06 21:36:17 -0700 | [diff] [blame] | 4632 | static int sctp_getsockopt_local_addrs(struct sock *sk, int len, |
| 4633 | char __user *optval, int __user *optlen) |
| 4634 | { |
| 4635 | struct sctp_bind_addr *bp; |
| 4636 | struct sctp_association *asoc; |
Ivan Skytte Jørgensen | 5fe467e | 2005-10-06 21:36:17 -0700 | [diff] [blame] | 4637 | int cnt = 0; |
| 4638 | struct sctp_getaddrs getaddrs; |
| 4639 | struct sctp_sockaddr_entry *addr; |
| 4640 | void __user *to; |
| 4641 | union sctp_addr temp; |
| 4642 | struct sctp_sock *sp = sctp_sk(sk); |
| 4643 | int addrlen; |
Ivan Skytte Jørgensen | 5fe467e | 2005-10-06 21:36:17 -0700 | [diff] [blame] | 4644 | int err = 0; |
| 4645 | size_t space_left; |
Vlad Yasevich | aad97f3 | 2007-04-28 21:09:04 -0700 | [diff] [blame] | 4646 | int bytes_copied = 0; |
| 4647 | void *addrs; |
Vlad Yasevich | 70b57b8 | 2007-05-09 13:51:31 -0700 | [diff] [blame] | 4648 | void *buf; |
Ivan Skytte Jørgensen | 5fe467e | 2005-10-06 21:36:17 -0700 | [diff] [blame] | 4649 | |
Neil Horman | 408f22e | 2007-06-16 14:03:45 -0400 | [diff] [blame] | 4650 | if (len < sizeof(struct sctp_getaddrs)) |
Ivan Skytte Jørgensen | 5fe467e | 2005-10-06 21:36:17 -0700 | [diff] [blame] | 4651 | return -EINVAL; |
| 4652 | |
| 4653 | if (copy_from_user(&getaddrs, optval, sizeof(struct sctp_getaddrs))) |
| 4654 | return -EFAULT; |
| 4655 | |
| 4656 | /* |
| 4657 | * For UDP-style sockets, id specifies the association to query. |
| 4658 | * If the id field is set to the value '0' then the locally bound |
| 4659 | * addresses are returned without regard to any particular |
| 4660 | * association. |
| 4661 | */ |
| 4662 | if (0 == getaddrs.assoc_id) { |
| 4663 | bp = &sctp_sk(sk)->ep->base.bind_addr; |
Ivan Skytte Jørgensen | 5fe467e | 2005-10-06 21:36:17 -0700 | [diff] [blame] | 4664 | } else { |
| 4665 | asoc = sctp_id2assoc(sk, getaddrs.assoc_id); |
| 4666 | if (!asoc) |
| 4667 | return -EINVAL; |
| 4668 | bp = &asoc->base.bind_addr; |
Ivan Skytte Jørgensen | 5fe467e | 2005-10-06 21:36:17 -0700 | [diff] [blame] | 4669 | } |
| 4670 | |
| 4671 | to = optval + offsetof(struct sctp_getaddrs,addrs); |
Neil Horman | 186e234 | 2007-06-18 19:59:16 -0400 | [diff] [blame] | 4672 | space_left = len - offsetof(struct sctp_getaddrs,addrs); |
| 4673 | |
Vlad Yasevich | aad97f3 | 2007-04-28 21:09:04 -0700 | [diff] [blame] | 4674 | addrs = kmalloc(space_left, GFP_KERNEL); |
| 4675 | if (!addrs) |
| 4676 | return -ENOMEM; |
Ivan Skytte Jørgensen | 5fe467e | 2005-10-06 21:36:17 -0700 | [diff] [blame] | 4677 | |
Ivan Skytte Jørgensen | 5fe467e | 2005-10-06 21:36:17 -0700 | [diff] [blame] | 4678 | /* If the endpoint is bound to 0.0.0.0 or ::0, get the valid |
| 4679 | * addresses from the global local address list. |
| 4680 | */ |
| 4681 | if (sctp_list_single_entry(&bp->address_list)) { |
| 4682 | addr = list_entry(bp->address_list.next, |
| 4683 | struct sctp_sockaddr_entry, list); |
Vlad Yasevich | 52cae8f | 2008-08-18 10:34:34 -0400 | [diff] [blame] | 4684 | if (sctp_is_any(sk, &addr->a)) { |
Vlad Yasevich | aad97f3 | 2007-04-28 21:09:04 -0700 | [diff] [blame] | 4685 | cnt = sctp_copy_laddrs(sk, bp->port, addrs, |
| 4686 | space_left, &bytes_copied); |
Ivan Skytte Jørgensen | 5fe467e | 2005-10-06 21:36:17 -0700 | [diff] [blame] | 4687 | if (cnt < 0) { |
| 4688 | err = cnt; |
Vlad Yasevich | 559cf71 | 2007-09-16 16:03:28 -0700 | [diff] [blame] | 4689 | goto out; |
Ivan Skytte Jørgensen | 5fe467e | 2005-10-06 21:36:17 -0700 | [diff] [blame] | 4690 | } |
YOSHIFUJI Hideaki | d808ad9 | 2007-02-09 23:25:18 +0900 | [diff] [blame] | 4691 | goto copy_getaddrs; |
Ivan Skytte Jørgensen | 5fe467e | 2005-10-06 21:36:17 -0700 | [diff] [blame] | 4692 | } |
| 4693 | } |
| 4694 | |
Vlad Yasevich | 70b57b8 | 2007-05-09 13:51:31 -0700 | [diff] [blame] | 4695 | buf = addrs; |
Vlad Yasevich | 559cf71 | 2007-09-16 16:03:28 -0700 | [diff] [blame] | 4696 | /* Protection on the bound address list is not needed since |
| 4697 | * in the socket option context we hold a socket lock and |
| 4698 | * thus the bound address list can't change. |
| 4699 | */ |
| 4700 | list_for_each_entry(addr, &bp->address_list, list) { |
Al Viro | 6244be4 | 2006-11-20 17:21:44 -0800 | [diff] [blame] | 4701 | memcpy(&temp, &addr->a, sizeof(temp)); |
Ivan Skytte Jørgensen | 5fe467e | 2005-10-06 21:36:17 -0700 | [diff] [blame] | 4702 | sctp_get_pf_specific(sk->sk_family)->addr_v4map(sp, &temp); |
| 4703 | addrlen = sctp_get_af_specific(temp.sa.sa_family)->sockaddr_len; |
Vlad Yasevich | aad97f3 | 2007-04-28 21:09:04 -0700 | [diff] [blame] | 4704 | if (space_left < addrlen) { |
| 4705 | err = -ENOMEM; /*fixme: right error?*/ |
Vlad Yasevich | 559cf71 | 2007-09-16 16:03:28 -0700 | [diff] [blame] | 4706 | goto out; |
Ivan Skytte Jørgensen | 5fe467e | 2005-10-06 21:36:17 -0700 | [diff] [blame] | 4707 | } |
Vlad Yasevich | 70b57b8 | 2007-05-09 13:51:31 -0700 | [diff] [blame] | 4708 | memcpy(buf, &temp, addrlen); |
| 4709 | buf += addrlen; |
Vlad Yasevich | aad97f3 | 2007-04-28 21:09:04 -0700 | [diff] [blame] | 4710 | bytes_copied += addrlen; |
Ivan Skytte Jørgensen | 5fe467e | 2005-10-06 21:36:17 -0700 | [diff] [blame] | 4711 | cnt ++; |
| 4712 | space_left -= addrlen; |
| 4713 | } |
| 4714 | |
| 4715 | copy_getaddrs: |
Vlad Yasevich | aad97f3 | 2007-04-28 21:09:04 -0700 | [diff] [blame] | 4716 | if (copy_to_user(to, addrs, bytes_copied)) { |
| 4717 | err = -EFAULT; |
Sebastian Siewior | d6f9fda | 2007-07-27 22:55:59 +0200 | [diff] [blame] | 4718 | goto out; |
Vlad Yasevich | aad97f3 | 2007-04-28 21:09:04 -0700 | [diff] [blame] | 4719 | } |
Vlad Yasevich | fe979ac | 2007-05-23 11:11:37 -0400 | [diff] [blame] | 4720 | if (put_user(cnt, &((struct sctp_getaddrs __user *)optval)->addr_num)) { |
| 4721 | err = -EFAULT; |
Sebastian Siewior | d6f9fda | 2007-07-27 22:55:59 +0200 | [diff] [blame] | 4722 | goto out; |
Vlad Yasevich | fe979ac | 2007-05-23 11:11:37 -0400 | [diff] [blame] | 4723 | } |
Ivan Skytte Jørgensen | 5fe467e | 2005-10-06 21:36:17 -0700 | [diff] [blame] | 4724 | if (put_user(bytes_copied, optlen)) |
Vlad Yasevich | fe979ac | 2007-05-23 11:11:37 -0400 | [diff] [blame] | 4725 | err = -EFAULT; |
Sebastian Siewior | d6f9fda | 2007-07-27 22:55:59 +0200 | [diff] [blame] | 4726 | out: |
Vlad Yasevich | aad97f3 | 2007-04-28 21:09:04 -0700 | [diff] [blame] | 4727 | kfree(addrs); |
Ivan Skytte Jørgensen | 5fe467e | 2005-10-06 21:36:17 -0700 | [diff] [blame] | 4728 | return err; |
| 4729 | } |
| 4730 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4731 | /* 7.1.10 Set Primary Address (SCTP_PRIMARY_ADDR) |
| 4732 | * |
| 4733 | * Requests that the local SCTP stack use the enclosed peer address as |
| 4734 | * the association primary. The enclosed address must be one of the |
| 4735 | * association peer's addresses. |
| 4736 | */ |
| 4737 | static int sctp_getsockopt_primary_addr(struct sock *sk, int len, |
| 4738 | char __user *optval, int __user *optlen) |
| 4739 | { |
| 4740 | struct sctp_prim prim; |
| 4741 | struct sctp_association *asoc; |
| 4742 | struct sctp_sock *sp = sctp_sk(sk); |
| 4743 | |
Neil Horman | 408f22e | 2007-06-16 14:03:45 -0400 | [diff] [blame] | 4744 | if (len < sizeof(struct sctp_prim)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4745 | return -EINVAL; |
| 4746 | |
Neil Horman | 408f22e | 2007-06-16 14:03:45 -0400 | [diff] [blame] | 4747 | len = sizeof(struct sctp_prim); |
| 4748 | |
| 4749 | if (copy_from_user(&prim, optval, len)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4750 | return -EFAULT; |
| 4751 | |
| 4752 | asoc = sctp_id2assoc(sk, prim.ssp_assoc_id); |
| 4753 | if (!asoc) |
| 4754 | return -EINVAL; |
| 4755 | |
| 4756 | if (!asoc->peer.primary_path) |
| 4757 | return -ENOTCONN; |
YOSHIFUJI Hideaki | d808ad9 | 2007-02-09 23:25:18 +0900 | [diff] [blame] | 4758 | |
Al Viro | 8cec6b8 | 2006-11-20 17:23:01 -0800 | [diff] [blame] | 4759 | memcpy(&prim.ssp_addr, &asoc->peer.primary_path->ipaddr, |
| 4760 | asoc->peer.primary_path->af_specific->sockaddr_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4761 | |
| 4762 | sctp_get_pf_specific(sk->sk_family)->addr_v4map(sp, |
| 4763 | (union sctp_addr *)&prim.ssp_addr); |
| 4764 | |
Neil Horman | 408f22e | 2007-06-16 14:03:45 -0400 | [diff] [blame] | 4765 | if (put_user(len, optlen)) |
| 4766 | return -EFAULT; |
| 4767 | if (copy_to_user(optval, &prim, len)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4768 | return -EFAULT; |
| 4769 | |
| 4770 | return 0; |
| 4771 | } |
| 4772 | |
| 4773 | /* |
Ivan Skytte Jorgensen | 0f3fffd | 2006-12-20 16:07:04 -0800 | [diff] [blame] | 4774 | * 7.1.11 Set Adaptation Layer Indicator (SCTP_ADAPTATION_LAYER) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4775 | * |
Ivan Skytte Jorgensen | 0f3fffd | 2006-12-20 16:07:04 -0800 | [diff] [blame] | 4776 | * Requests that the local endpoint set the specified Adaptation Layer |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4777 | * Indication parameter for all future INIT and INIT-ACK exchanges. |
| 4778 | */ |
Ivan Skytte Jorgensen | 0f3fffd | 2006-12-20 16:07:04 -0800 | [diff] [blame] | 4779 | static int sctp_getsockopt_adaptation_layer(struct sock *sk, int len, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4780 | char __user *optval, int __user *optlen) |
| 4781 | { |
Ivan Skytte Jorgensen | 0f3fffd | 2006-12-20 16:07:04 -0800 | [diff] [blame] | 4782 | struct sctp_setadaptation adaptation; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4783 | |
Neil Horman | 408f22e | 2007-06-16 14:03:45 -0400 | [diff] [blame] | 4784 | if (len < sizeof(struct sctp_setadaptation)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4785 | return -EINVAL; |
| 4786 | |
Neil Horman | 408f22e | 2007-06-16 14:03:45 -0400 | [diff] [blame] | 4787 | len = sizeof(struct sctp_setadaptation); |
| 4788 | |
Ivan Skytte Jorgensen | 0f3fffd | 2006-12-20 16:07:04 -0800 | [diff] [blame] | 4789 | adaptation.ssb_adaptation_ind = sctp_sk(sk)->adaptation_ind; |
Neil Horman | 408f22e | 2007-06-16 14:03:45 -0400 | [diff] [blame] | 4790 | |
| 4791 | if (put_user(len, optlen)) |
| 4792 | return -EFAULT; |
Ivan Skytte Jorgensen | 0f3fffd | 2006-12-20 16:07:04 -0800 | [diff] [blame] | 4793 | if (copy_to_user(optval, &adaptation, len)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4794 | return -EFAULT; |
Ivan Skytte Jorgensen | a1ab358 | 2005-10-28 15:33:24 -0700 | [diff] [blame] | 4795 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4796 | return 0; |
| 4797 | } |
| 4798 | |
| 4799 | /* |
| 4800 | * |
| 4801 | * 7.1.14 Set default send parameters (SCTP_DEFAULT_SEND_PARAM) |
| 4802 | * |
| 4803 | * Applications that wish to use the sendto() system call may wish to |
| 4804 | * specify a default set of parameters that would normally be supplied |
| 4805 | * through the inclusion of ancillary data. This socket option allows |
| 4806 | * such an application to set the default sctp_sndrcvinfo structure. |
| 4807 | |
| 4808 | |
| 4809 | * The application that wishes to use this socket option simply passes |
| 4810 | * in to this call the sctp_sndrcvinfo structure defined in Section |
| 4811 | * 5.2.2) The input parameters accepted by this call include |
| 4812 | * sinfo_stream, sinfo_flags, sinfo_ppid, sinfo_context, |
| 4813 | * sinfo_timetolive. The user must provide the sinfo_assoc_id field in |
| 4814 | * to this call if the caller is using the UDP model. |
| 4815 | * |
| 4816 | * For getsockopt, it get the default sctp_sndrcvinfo structure. |
| 4817 | */ |
| 4818 | static int sctp_getsockopt_default_send_param(struct sock *sk, |
| 4819 | int len, char __user *optval, |
| 4820 | int __user *optlen) |
| 4821 | { |
| 4822 | struct sctp_sndrcvinfo info; |
| 4823 | struct sctp_association *asoc; |
| 4824 | struct sctp_sock *sp = sctp_sk(sk); |
| 4825 | |
Neil Horman | 408f22e | 2007-06-16 14:03:45 -0400 | [diff] [blame] | 4826 | if (len < sizeof(struct sctp_sndrcvinfo)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4827 | return -EINVAL; |
Neil Horman | 408f22e | 2007-06-16 14:03:45 -0400 | [diff] [blame] | 4828 | |
| 4829 | len = sizeof(struct sctp_sndrcvinfo); |
| 4830 | |
| 4831 | if (copy_from_user(&info, optval, len)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4832 | return -EFAULT; |
| 4833 | |
| 4834 | asoc = sctp_id2assoc(sk, info.sinfo_assoc_id); |
| 4835 | if (!asoc && info.sinfo_assoc_id && sctp_style(sk, UDP)) |
| 4836 | return -EINVAL; |
| 4837 | |
| 4838 | if (asoc) { |
| 4839 | info.sinfo_stream = asoc->default_stream; |
| 4840 | info.sinfo_flags = asoc->default_flags; |
| 4841 | info.sinfo_ppid = asoc->default_ppid; |
| 4842 | info.sinfo_context = asoc->default_context; |
| 4843 | info.sinfo_timetolive = asoc->default_timetolive; |
| 4844 | } else { |
| 4845 | info.sinfo_stream = sp->default_stream; |
| 4846 | info.sinfo_flags = sp->default_flags; |
| 4847 | info.sinfo_ppid = sp->default_ppid; |
| 4848 | info.sinfo_context = sp->default_context; |
| 4849 | info.sinfo_timetolive = sp->default_timetolive; |
| 4850 | } |
| 4851 | |
Neil Horman | 408f22e | 2007-06-16 14:03:45 -0400 | [diff] [blame] | 4852 | if (put_user(len, optlen)) |
| 4853 | return -EFAULT; |
| 4854 | if (copy_to_user(optval, &info, len)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4855 | return -EFAULT; |
| 4856 | |
| 4857 | return 0; |
| 4858 | } |
| 4859 | |
| 4860 | /* |
| 4861 | * |
| 4862 | * 7.1.5 SCTP_NODELAY |
| 4863 | * |
| 4864 | * Turn on/off any Nagle-like algorithm. This means that packets are |
| 4865 | * generally sent as soon as possible and no unnecessary delays are |
| 4866 | * introduced, at the cost of more packets in the network. Expects an |
| 4867 | * integer boolean flag. |
| 4868 | */ |
| 4869 | |
| 4870 | static int sctp_getsockopt_nodelay(struct sock *sk, int len, |
| 4871 | char __user *optval, int __user *optlen) |
| 4872 | { |
| 4873 | int val; |
| 4874 | |
| 4875 | if (len < sizeof(int)) |
| 4876 | return -EINVAL; |
| 4877 | |
| 4878 | len = sizeof(int); |
| 4879 | val = (sctp_sk(sk)->nodelay == 1); |
| 4880 | if (put_user(len, optlen)) |
| 4881 | return -EFAULT; |
| 4882 | if (copy_to_user(optval, &val, len)) |
| 4883 | return -EFAULT; |
| 4884 | return 0; |
| 4885 | } |
| 4886 | |
| 4887 | /* |
| 4888 | * |
| 4889 | * 7.1.1 SCTP_RTOINFO |
| 4890 | * |
| 4891 | * The protocol parameters used to initialize and bound retransmission |
| 4892 | * timeout (RTO) are tunable. sctp_rtoinfo structure is used to access |
| 4893 | * and modify these parameters. |
| 4894 | * All parameters are time values, in milliseconds. A value of 0, when |
| 4895 | * modifying the parameters, indicates that the current value should not |
| 4896 | * be changed. |
| 4897 | * |
| 4898 | */ |
| 4899 | static int sctp_getsockopt_rtoinfo(struct sock *sk, int len, |
| 4900 | char __user *optval, |
| 4901 | int __user *optlen) { |
| 4902 | struct sctp_rtoinfo rtoinfo; |
| 4903 | struct sctp_association *asoc; |
| 4904 | |
Neil Horman | 408f22e | 2007-06-16 14:03:45 -0400 | [diff] [blame] | 4905 | if (len < sizeof (struct sctp_rtoinfo)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4906 | return -EINVAL; |
| 4907 | |
Neil Horman | 408f22e | 2007-06-16 14:03:45 -0400 | [diff] [blame] | 4908 | len = sizeof(struct sctp_rtoinfo); |
| 4909 | |
| 4910 | if (copy_from_user(&rtoinfo, optval, len)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4911 | return -EFAULT; |
| 4912 | |
| 4913 | asoc = sctp_id2assoc(sk, rtoinfo.srto_assoc_id); |
| 4914 | |
| 4915 | if (!asoc && rtoinfo.srto_assoc_id && sctp_style(sk, UDP)) |
| 4916 | return -EINVAL; |
| 4917 | |
| 4918 | /* Values corresponding to the specific association. */ |
| 4919 | if (asoc) { |
| 4920 | rtoinfo.srto_initial = jiffies_to_msecs(asoc->rto_initial); |
| 4921 | rtoinfo.srto_max = jiffies_to_msecs(asoc->rto_max); |
| 4922 | rtoinfo.srto_min = jiffies_to_msecs(asoc->rto_min); |
| 4923 | } else { |
| 4924 | /* Values corresponding to the endpoint. */ |
| 4925 | struct sctp_sock *sp = sctp_sk(sk); |
| 4926 | |
| 4927 | rtoinfo.srto_initial = sp->rtoinfo.srto_initial; |
| 4928 | rtoinfo.srto_max = sp->rtoinfo.srto_max; |
| 4929 | rtoinfo.srto_min = sp->rtoinfo.srto_min; |
| 4930 | } |
| 4931 | |
| 4932 | if (put_user(len, optlen)) |
| 4933 | return -EFAULT; |
| 4934 | |
| 4935 | if (copy_to_user(optval, &rtoinfo, len)) |
| 4936 | return -EFAULT; |
| 4937 | |
| 4938 | return 0; |
| 4939 | } |
| 4940 | |
| 4941 | /* |
| 4942 | * |
| 4943 | * 7.1.2 SCTP_ASSOCINFO |
| 4944 | * |
Michael Opdenacker | 59c5159 | 2007-05-09 08:57:56 +0200 | [diff] [blame] | 4945 | * This option is used to tune the maximum retransmission attempts |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4946 | * of the association. |
| 4947 | * Returns an error if the new association retransmission value is |
| 4948 | * greater than the sum of the retransmission value of the peer. |
| 4949 | * See [SCTP] for more information. |
| 4950 | * |
| 4951 | */ |
| 4952 | static int sctp_getsockopt_associnfo(struct sock *sk, int len, |
| 4953 | char __user *optval, |
| 4954 | int __user *optlen) |
| 4955 | { |
| 4956 | |
| 4957 | struct sctp_assocparams assocparams; |
| 4958 | struct sctp_association *asoc; |
| 4959 | struct list_head *pos; |
| 4960 | int cnt = 0; |
| 4961 | |
Neil Horman | 408f22e | 2007-06-16 14:03:45 -0400 | [diff] [blame] | 4962 | if (len < sizeof (struct sctp_assocparams)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4963 | return -EINVAL; |
| 4964 | |
Neil Horman | 408f22e | 2007-06-16 14:03:45 -0400 | [diff] [blame] | 4965 | len = sizeof(struct sctp_assocparams); |
| 4966 | |
| 4967 | if (copy_from_user(&assocparams, optval, len)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4968 | return -EFAULT; |
| 4969 | |
| 4970 | asoc = sctp_id2assoc(sk, assocparams.sasoc_assoc_id); |
| 4971 | |
| 4972 | if (!asoc && assocparams.sasoc_assoc_id && sctp_style(sk, UDP)) |
| 4973 | return -EINVAL; |
| 4974 | |
| 4975 | /* Values correspoinding to the specific association */ |
Vladislav Yasevich | 1733721 | 2005-04-28 11:57:54 -0700 | [diff] [blame] | 4976 | if (asoc) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4977 | assocparams.sasoc_asocmaxrxt = asoc->max_retrans; |
| 4978 | assocparams.sasoc_peer_rwnd = asoc->peer.rwnd; |
| 4979 | assocparams.sasoc_local_rwnd = asoc->a_rwnd; |
| 4980 | assocparams.sasoc_cookie_life = (asoc->cookie_life.tv_sec |
| 4981 | * 1000) + |
| 4982 | (asoc->cookie_life.tv_usec |
| 4983 | / 1000); |
| 4984 | |
| 4985 | list_for_each(pos, &asoc->peer.transport_addr_list) { |
| 4986 | cnt ++; |
| 4987 | } |
| 4988 | |
| 4989 | assocparams.sasoc_number_peer_destinations = cnt; |
| 4990 | } else { |
| 4991 | /* Values corresponding to the endpoint */ |
| 4992 | struct sctp_sock *sp = sctp_sk(sk); |
| 4993 | |
| 4994 | assocparams.sasoc_asocmaxrxt = sp->assocparams.sasoc_asocmaxrxt; |
| 4995 | assocparams.sasoc_peer_rwnd = sp->assocparams.sasoc_peer_rwnd; |
| 4996 | assocparams.sasoc_local_rwnd = sp->assocparams.sasoc_local_rwnd; |
| 4997 | assocparams.sasoc_cookie_life = |
| 4998 | sp->assocparams.sasoc_cookie_life; |
| 4999 | assocparams.sasoc_number_peer_destinations = |
| 5000 | sp->assocparams. |
| 5001 | sasoc_number_peer_destinations; |
| 5002 | } |
| 5003 | |
| 5004 | if (put_user(len, optlen)) |
| 5005 | return -EFAULT; |
| 5006 | |
| 5007 | if (copy_to_user(optval, &assocparams, len)) |
| 5008 | return -EFAULT; |
| 5009 | |
| 5010 | return 0; |
| 5011 | } |
| 5012 | |
| 5013 | /* |
| 5014 | * 7.1.16 Set/clear IPv4 mapped addresses (SCTP_I_WANT_MAPPED_V4_ADDR) |
| 5015 | * |
| 5016 | * This socket option is a boolean flag which turns on or off mapped V4 |
| 5017 | * addresses. If this option is turned on and the socket is type |
| 5018 | * PF_INET6, then IPv4 addresses will be mapped to V6 representation. |
| 5019 | * If this option is turned off, then no mapping will be done of V4 |
| 5020 | * addresses and a user will receive both PF_INET6 and PF_INET type |
| 5021 | * addresses on the socket. |
| 5022 | */ |
| 5023 | static int sctp_getsockopt_mappedv4(struct sock *sk, int len, |
| 5024 | char __user *optval, int __user *optlen) |
| 5025 | { |
| 5026 | int val; |
| 5027 | struct sctp_sock *sp = sctp_sk(sk); |
| 5028 | |
| 5029 | if (len < sizeof(int)) |
| 5030 | return -EINVAL; |
| 5031 | |
| 5032 | len = sizeof(int); |
| 5033 | val = sp->v4mapped; |
| 5034 | if (put_user(len, optlen)) |
| 5035 | return -EFAULT; |
| 5036 | if (copy_to_user(optval, &val, len)) |
| 5037 | return -EFAULT; |
| 5038 | |
| 5039 | return 0; |
| 5040 | } |
| 5041 | |
| 5042 | /* |
Ivan Skytte Jorgensen | 6ab792f | 2006-12-13 16:34:22 -0800 | [diff] [blame] | 5043 | * 7.1.29. Set or Get the default context (SCTP_CONTEXT) |
| 5044 | * (chapter and verse is quoted at sctp_setsockopt_context()) |
| 5045 | */ |
| 5046 | static int sctp_getsockopt_context(struct sock *sk, int len, |
| 5047 | char __user *optval, int __user *optlen) |
| 5048 | { |
| 5049 | struct sctp_assoc_value params; |
| 5050 | struct sctp_sock *sp; |
| 5051 | struct sctp_association *asoc; |
| 5052 | |
Neil Horman | 408f22e | 2007-06-16 14:03:45 -0400 | [diff] [blame] | 5053 | if (len < sizeof(struct sctp_assoc_value)) |
Ivan Skytte Jorgensen | 6ab792f | 2006-12-13 16:34:22 -0800 | [diff] [blame] | 5054 | return -EINVAL; |
| 5055 | |
Neil Horman | 408f22e | 2007-06-16 14:03:45 -0400 | [diff] [blame] | 5056 | len = sizeof(struct sctp_assoc_value); |
| 5057 | |
Ivan Skytte Jorgensen | 6ab792f | 2006-12-13 16:34:22 -0800 | [diff] [blame] | 5058 | if (copy_from_user(¶ms, optval, len)) |
| 5059 | return -EFAULT; |
| 5060 | |
| 5061 | sp = sctp_sk(sk); |
| 5062 | |
| 5063 | if (params.assoc_id != 0) { |
| 5064 | asoc = sctp_id2assoc(sk, params.assoc_id); |
| 5065 | if (!asoc) |
| 5066 | return -EINVAL; |
| 5067 | params.assoc_value = asoc->default_rcv_context; |
| 5068 | } else { |
| 5069 | params.assoc_value = sp->default_rcv_context; |
| 5070 | } |
| 5071 | |
| 5072 | if (put_user(len, optlen)) |
| 5073 | return -EFAULT; |
| 5074 | if (copy_to_user(optval, ¶ms, len)) |
| 5075 | return -EFAULT; |
| 5076 | |
| 5077 | return 0; |
| 5078 | } |
| 5079 | |
| 5080 | /* |
Wei Yongjun | e89c209 | 2008-12-25 16:54:58 -0800 | [diff] [blame] | 5081 | * 8.1.16. Get or Set the Maximum Fragmentation Size (SCTP_MAXSEG) |
| 5082 | * This option will get or set the maximum size to put in any outgoing |
| 5083 | * SCTP DATA chunk. If a message is larger than this size it will be |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5084 | * fragmented by SCTP into the specified size. Note that the underlying |
| 5085 | * SCTP implementation may fragment into smaller sized chunks when the |
| 5086 | * PMTU of the underlying association is smaller than the value set by |
Wei Yongjun | e89c209 | 2008-12-25 16:54:58 -0800 | [diff] [blame] | 5087 | * the user. The default value for this option is '0' which indicates |
| 5088 | * the user is NOT limiting fragmentation and only the PMTU will effect |
| 5089 | * SCTP's choice of DATA chunk size. Note also that values set larger |
| 5090 | * than the maximum size of an IP datagram will effectively let SCTP |
| 5091 | * control fragmentation (i.e. the same as setting this option to 0). |
| 5092 | * |
| 5093 | * The following structure is used to access and modify this parameter: |
| 5094 | * |
| 5095 | * struct sctp_assoc_value { |
| 5096 | * sctp_assoc_t assoc_id; |
| 5097 | * uint32_t assoc_value; |
| 5098 | * }; |
| 5099 | * |
| 5100 | * assoc_id: This parameter is ignored for one-to-one style sockets. |
| 5101 | * For one-to-many style sockets this parameter indicates which |
| 5102 | * association the user is performing an action upon. Note that if |
| 5103 | * this field's value is zero then the endpoints default value is |
| 5104 | * changed (effecting future associations only). |
| 5105 | * assoc_value: This parameter specifies the maximum size in bytes. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5106 | */ |
| 5107 | static int sctp_getsockopt_maxseg(struct sock *sk, int len, |
| 5108 | char __user *optval, int __user *optlen) |
| 5109 | { |
Wei Yongjun | e89c209 | 2008-12-25 16:54:58 -0800 | [diff] [blame] | 5110 | struct sctp_assoc_value params; |
| 5111 | struct sctp_association *asoc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5112 | |
Wei Yongjun | e89c209 | 2008-12-25 16:54:58 -0800 | [diff] [blame] | 5113 | if (len == sizeof(int)) { |
Joe Perches | 145ce50 | 2010-08-24 13:21:08 +0000 | [diff] [blame] | 5114 | pr_warn("Use of int in maxseg socket option deprecated\n"); |
| 5115 | pr_warn("Use struct sctp_assoc_value instead\n"); |
Wei Yongjun | e89c209 | 2008-12-25 16:54:58 -0800 | [diff] [blame] | 5116 | params.assoc_id = 0; |
| 5117 | } else if (len >= sizeof(struct sctp_assoc_value)) { |
| 5118 | len = sizeof(struct sctp_assoc_value); |
| 5119 | if (copy_from_user(¶ms, optval, sizeof(params))) |
| 5120 | return -EFAULT; |
| 5121 | } else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5122 | return -EINVAL; |
| 5123 | |
Wei Yongjun | e89c209 | 2008-12-25 16:54:58 -0800 | [diff] [blame] | 5124 | asoc = sctp_id2assoc(sk, params.assoc_id); |
| 5125 | if (!asoc && params.assoc_id && sctp_style(sk, UDP)) |
| 5126 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5127 | |
Wei Yongjun | e89c209 | 2008-12-25 16:54:58 -0800 | [diff] [blame] | 5128 | if (asoc) |
| 5129 | params.assoc_value = asoc->frag_point; |
| 5130 | else |
| 5131 | params.assoc_value = sctp_sk(sk)->user_frag; |
| 5132 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5133 | if (put_user(len, optlen)) |
| 5134 | return -EFAULT; |
Wei Yongjun | e89c209 | 2008-12-25 16:54:58 -0800 | [diff] [blame] | 5135 | if (len == sizeof(int)) { |
| 5136 | if (copy_to_user(optval, ¶ms.assoc_value, len)) |
| 5137 | return -EFAULT; |
| 5138 | } else { |
| 5139 | if (copy_to_user(optval, ¶ms, len)) |
| 5140 | return -EFAULT; |
| 5141 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5142 | |
| 5143 | return 0; |
| 5144 | } |
| 5145 | |
Vlad Yasevich | b6e1331 | 2007-04-20 12:23:15 -0700 | [diff] [blame] | 5146 | /* |
| 5147 | * 7.1.24. Get or set fragmented interleave (SCTP_FRAGMENT_INTERLEAVE) |
| 5148 | * (chapter and verse is quoted at sctp_setsockopt_fragment_interleave()) |
| 5149 | */ |
| 5150 | static int sctp_getsockopt_fragment_interleave(struct sock *sk, int len, |
| 5151 | char __user *optval, int __user *optlen) |
| 5152 | { |
| 5153 | int val; |
| 5154 | |
| 5155 | if (len < sizeof(int)) |
| 5156 | return -EINVAL; |
| 5157 | |
| 5158 | len = sizeof(int); |
| 5159 | |
| 5160 | val = sctp_sk(sk)->frag_interleave; |
| 5161 | if (put_user(len, optlen)) |
| 5162 | return -EFAULT; |
| 5163 | if (copy_to_user(optval, &val, len)) |
| 5164 | return -EFAULT; |
| 5165 | |
| 5166 | return 0; |
| 5167 | } |
| 5168 | |
Vlad Yasevich | d49d91d | 2007-03-23 11:32:00 -0700 | [diff] [blame] | 5169 | /* |
| 5170 | * 7.1.25. Set or Get the sctp partial delivery point |
| 5171 | * (chapter and verse is quoted at sctp_setsockopt_partial_delivery_point()) |
| 5172 | */ |
| 5173 | static int sctp_getsockopt_partial_delivery_point(struct sock *sk, int len, |
| 5174 | char __user *optval, |
| 5175 | int __user *optlen) |
| 5176 | { |
YOSHIFUJI Hideaki | 9cbcbf4 | 2007-07-19 10:44:50 +0900 | [diff] [blame] | 5177 | u32 val; |
Vlad Yasevich | d49d91d | 2007-03-23 11:32:00 -0700 | [diff] [blame] | 5178 | |
| 5179 | if (len < sizeof(u32)) |
| 5180 | return -EINVAL; |
| 5181 | |
| 5182 | len = sizeof(u32); |
| 5183 | |
| 5184 | val = sctp_sk(sk)->pd_point; |
| 5185 | if (put_user(len, optlen)) |
| 5186 | return -EFAULT; |
| 5187 | if (copy_to_user(optval, &val, len)) |
| 5188 | return -EFAULT; |
| 5189 | |
Wei Yongjun | 7d743b7 | 2010-12-14 16:10:41 +0000 | [diff] [blame] | 5190 | return 0; |
Vlad Yasevich | d49d91d | 2007-03-23 11:32:00 -0700 | [diff] [blame] | 5191 | } |
| 5192 | |
Vlad Yasevich | 7033157 | 2007-03-23 11:34:36 -0700 | [diff] [blame] | 5193 | /* |
| 5194 | * 7.1.28. Set or Get the maximum burst (SCTP_MAX_BURST) |
| 5195 | * (chapter and verse is quoted at sctp_setsockopt_maxburst()) |
| 5196 | */ |
| 5197 | static int sctp_getsockopt_maxburst(struct sock *sk, int len, |
| 5198 | char __user *optval, |
| 5199 | int __user *optlen) |
| 5200 | { |
Neil Horman | 219b99a | 2008-03-05 13:44:46 -0800 | [diff] [blame] | 5201 | struct sctp_assoc_value params; |
| 5202 | struct sctp_sock *sp; |
| 5203 | struct sctp_association *asoc; |
Vlad Yasevich | 7033157 | 2007-03-23 11:34:36 -0700 | [diff] [blame] | 5204 | |
Neil Horman | 219b99a | 2008-03-05 13:44:46 -0800 | [diff] [blame] | 5205 | if (len == sizeof(int)) { |
Joe Perches | 145ce50 | 2010-08-24 13:21:08 +0000 | [diff] [blame] | 5206 | pr_warn("Use of int in max_burst socket option deprecated\n"); |
| 5207 | pr_warn("Use struct sctp_assoc_value instead\n"); |
Neil Horman | 219b99a | 2008-03-05 13:44:46 -0800 | [diff] [blame] | 5208 | params.assoc_id = 0; |
Wei Yongjun | c6db93a | 2009-03-02 09:46:12 +0000 | [diff] [blame] | 5209 | } else if (len >= sizeof(struct sctp_assoc_value)) { |
| 5210 | len = sizeof(struct sctp_assoc_value); |
Neil Horman | 219b99a | 2008-03-05 13:44:46 -0800 | [diff] [blame] | 5211 | if (copy_from_user(¶ms, optval, len)) |
| 5212 | return -EFAULT; |
| 5213 | } else |
| 5214 | return -EINVAL; |
Vlad Yasevich | 7033157 | 2007-03-23 11:34:36 -0700 | [diff] [blame] | 5215 | |
Neil Horman | 219b99a | 2008-03-05 13:44:46 -0800 | [diff] [blame] | 5216 | sp = sctp_sk(sk); |
Vlad Yasevich | 7033157 | 2007-03-23 11:34:36 -0700 | [diff] [blame] | 5217 | |
Neil Horman | 219b99a | 2008-03-05 13:44:46 -0800 | [diff] [blame] | 5218 | if (params.assoc_id != 0) { |
| 5219 | asoc = sctp_id2assoc(sk, params.assoc_id); |
| 5220 | if (!asoc) |
| 5221 | return -EINVAL; |
| 5222 | params.assoc_value = asoc->max_burst; |
| 5223 | } else |
| 5224 | params.assoc_value = sp->max_burst; |
| 5225 | |
| 5226 | if (len == sizeof(int)) { |
| 5227 | if (copy_to_user(optval, ¶ms.assoc_value, len)) |
| 5228 | return -EFAULT; |
| 5229 | } else { |
| 5230 | if (copy_to_user(optval, ¶ms, len)) |
| 5231 | return -EFAULT; |
| 5232 | } |
| 5233 | |
| 5234 | return 0; |
| 5235 | |
Vlad Yasevich | 7033157 | 2007-03-23 11:34:36 -0700 | [diff] [blame] | 5236 | } |
| 5237 | |
Vlad Yasevich | 65b07e5 | 2007-09-16 19:34:00 -0700 | [diff] [blame] | 5238 | static int sctp_getsockopt_hmac_ident(struct sock *sk, int len, |
| 5239 | char __user *optval, int __user *optlen) |
| 5240 | { |
Vlad Yasevich | 5e739d1 | 2008-08-21 03:34:25 -0700 | [diff] [blame] | 5241 | struct sctp_hmacalgo __user *p = (void __user *)optval; |
Vlad Yasevich | 65b07e5 | 2007-09-16 19:34:00 -0700 | [diff] [blame] | 5242 | struct sctp_hmac_algo_param *hmacs; |
Vlad Yasevich | 5e739d1 | 2008-08-21 03:34:25 -0700 | [diff] [blame] | 5243 | __u16 data_len = 0; |
| 5244 | u32 num_idents; |
| 5245 | |
| 5246 | if (!sctp_auth_enable) |
| 5247 | return -EACCES; |
Vlad Yasevich | 65b07e5 | 2007-09-16 19:34:00 -0700 | [diff] [blame] | 5248 | |
| 5249 | hmacs = sctp_sk(sk)->ep->auth_hmacs_list; |
Vlad Yasevich | 5e739d1 | 2008-08-21 03:34:25 -0700 | [diff] [blame] | 5250 | data_len = ntohs(hmacs->param_hdr.length) - sizeof(sctp_paramhdr_t); |
Vlad Yasevich | 65b07e5 | 2007-09-16 19:34:00 -0700 | [diff] [blame] | 5251 | |
Vlad Yasevich | 5e739d1 | 2008-08-21 03:34:25 -0700 | [diff] [blame] | 5252 | if (len < sizeof(struct sctp_hmacalgo) + data_len) |
Vlad Yasevich | 65b07e5 | 2007-09-16 19:34:00 -0700 | [diff] [blame] | 5253 | return -EINVAL; |
Vlad Yasevich | 5e739d1 | 2008-08-21 03:34:25 -0700 | [diff] [blame] | 5254 | |
| 5255 | len = sizeof(struct sctp_hmacalgo) + data_len; |
| 5256 | num_idents = data_len / sizeof(u16); |
| 5257 | |
Vlad Yasevich | 65b07e5 | 2007-09-16 19:34:00 -0700 | [diff] [blame] | 5258 | if (put_user(len, optlen)) |
| 5259 | return -EFAULT; |
Vlad Yasevich | 5e739d1 | 2008-08-21 03:34:25 -0700 | [diff] [blame] | 5260 | if (put_user(num_idents, &p->shmac_num_idents)) |
Vlad Yasevich | 65b07e5 | 2007-09-16 19:34:00 -0700 | [diff] [blame] | 5261 | return -EFAULT; |
Vlad Yasevich | 5e739d1 | 2008-08-21 03:34:25 -0700 | [diff] [blame] | 5262 | if (copy_to_user(p->shmac_idents, hmacs->hmac_ids, data_len)) |
| 5263 | return -EFAULT; |
Vlad Yasevich | 65b07e5 | 2007-09-16 19:34:00 -0700 | [diff] [blame] | 5264 | return 0; |
| 5265 | } |
| 5266 | |
| 5267 | static int sctp_getsockopt_active_key(struct sock *sk, int len, |
| 5268 | char __user *optval, int __user *optlen) |
| 5269 | { |
| 5270 | struct sctp_authkeyid val; |
| 5271 | struct sctp_association *asoc; |
| 5272 | |
Vlad Yasevich | 5e739d1 | 2008-08-21 03:34:25 -0700 | [diff] [blame] | 5273 | if (!sctp_auth_enable) |
| 5274 | return -EACCES; |
| 5275 | |
Vlad Yasevich | 65b07e5 | 2007-09-16 19:34:00 -0700 | [diff] [blame] | 5276 | if (len < sizeof(struct sctp_authkeyid)) |
| 5277 | return -EINVAL; |
| 5278 | if (copy_from_user(&val, optval, sizeof(struct sctp_authkeyid))) |
| 5279 | return -EFAULT; |
| 5280 | |
| 5281 | asoc = sctp_id2assoc(sk, val.scact_assoc_id); |
| 5282 | if (!asoc && val.scact_assoc_id && sctp_style(sk, UDP)) |
| 5283 | return -EINVAL; |
| 5284 | |
| 5285 | if (asoc) |
| 5286 | val.scact_keynumber = asoc->active_key_id; |
| 5287 | else |
| 5288 | val.scact_keynumber = sctp_sk(sk)->ep->active_key_id; |
| 5289 | |
Vlad Yasevich | 5e739d1 | 2008-08-21 03:34:25 -0700 | [diff] [blame] | 5290 | len = sizeof(struct sctp_authkeyid); |
| 5291 | if (put_user(len, optlen)) |
| 5292 | return -EFAULT; |
| 5293 | if (copy_to_user(optval, &val, len)) |
| 5294 | return -EFAULT; |
| 5295 | |
Vlad Yasevich | 65b07e5 | 2007-09-16 19:34:00 -0700 | [diff] [blame] | 5296 | return 0; |
| 5297 | } |
| 5298 | |
| 5299 | static int sctp_getsockopt_peer_auth_chunks(struct sock *sk, int len, |
| 5300 | char __user *optval, int __user *optlen) |
| 5301 | { |
Al Viro | 411223c | 2007-10-14 19:21:20 +0100 | [diff] [blame] | 5302 | struct sctp_authchunks __user *p = (void __user *)optval; |
Vlad Yasevich | 65b07e5 | 2007-09-16 19:34:00 -0700 | [diff] [blame] | 5303 | struct sctp_authchunks val; |
| 5304 | struct sctp_association *asoc; |
| 5305 | struct sctp_chunks_param *ch; |
Vlad Yasevich | 5e739d1 | 2008-08-21 03:34:25 -0700 | [diff] [blame] | 5306 | u32 num_chunks = 0; |
Vlad Yasevich | 65b07e5 | 2007-09-16 19:34:00 -0700 | [diff] [blame] | 5307 | char __user *to; |
| 5308 | |
Vlad Yasevich | 5e739d1 | 2008-08-21 03:34:25 -0700 | [diff] [blame] | 5309 | if (!sctp_auth_enable) |
| 5310 | return -EACCES; |
| 5311 | |
| 5312 | if (len < sizeof(struct sctp_authchunks)) |
Vlad Yasevich | 65b07e5 | 2007-09-16 19:34:00 -0700 | [diff] [blame] | 5313 | return -EINVAL; |
| 5314 | |
Vlad Yasevich | 5e739d1 | 2008-08-21 03:34:25 -0700 | [diff] [blame] | 5315 | if (copy_from_user(&val, optval, sizeof(struct sctp_authchunks))) |
Vlad Yasevich | 65b07e5 | 2007-09-16 19:34:00 -0700 | [diff] [blame] | 5316 | return -EFAULT; |
| 5317 | |
Al Viro | 411223c | 2007-10-14 19:21:20 +0100 | [diff] [blame] | 5318 | to = p->gauth_chunks; |
Vlad Yasevich | 65b07e5 | 2007-09-16 19:34:00 -0700 | [diff] [blame] | 5319 | asoc = sctp_id2assoc(sk, val.gauth_assoc_id); |
| 5320 | if (!asoc) |
| 5321 | return -EINVAL; |
| 5322 | |
| 5323 | ch = asoc->peer.peer_chunks; |
Vlad Yasevich | 5e739d1 | 2008-08-21 03:34:25 -0700 | [diff] [blame] | 5324 | if (!ch) |
| 5325 | goto num; |
Vlad Yasevich | 65b07e5 | 2007-09-16 19:34:00 -0700 | [diff] [blame] | 5326 | |
| 5327 | /* See if the user provided enough room for all the data */ |
Vlad Yasevich | b40db68 | 2008-02-27 14:40:37 -0500 | [diff] [blame] | 5328 | num_chunks = ntohs(ch->param_hdr.length) - sizeof(sctp_paramhdr_t); |
| 5329 | if (len < num_chunks) |
Vlad Yasevich | 65b07e5 | 2007-09-16 19:34:00 -0700 | [diff] [blame] | 5330 | return -EINVAL; |
| 5331 | |
Vlad Yasevich | 5e739d1 | 2008-08-21 03:34:25 -0700 | [diff] [blame] | 5332 | if (copy_to_user(to, ch->chunks, num_chunks)) |
Vlad Yasevich | 65b07e5 | 2007-09-16 19:34:00 -0700 | [diff] [blame] | 5333 | return -EFAULT; |
Vlad Yasevich | 5e739d1 | 2008-08-21 03:34:25 -0700 | [diff] [blame] | 5334 | num: |
| 5335 | len = sizeof(struct sctp_authchunks) + num_chunks; |
| 5336 | if (put_user(len, optlen)) return -EFAULT; |
Vlad Yasevich | 7e8616d | 2008-02-27 16:04:52 -0500 | [diff] [blame] | 5337 | if (put_user(num_chunks, &p->gauth_number_of_chunks)) |
| 5338 | return -EFAULT; |
Vlad Yasevich | 65b07e5 | 2007-09-16 19:34:00 -0700 | [diff] [blame] | 5339 | return 0; |
| 5340 | } |
| 5341 | |
| 5342 | static int sctp_getsockopt_local_auth_chunks(struct sock *sk, int len, |
| 5343 | char __user *optval, int __user *optlen) |
| 5344 | { |
Al Viro | 411223c | 2007-10-14 19:21:20 +0100 | [diff] [blame] | 5345 | struct sctp_authchunks __user *p = (void __user *)optval; |
Vlad Yasevich | 65b07e5 | 2007-09-16 19:34:00 -0700 | [diff] [blame] | 5346 | struct sctp_authchunks val; |
| 5347 | struct sctp_association *asoc; |
| 5348 | struct sctp_chunks_param *ch; |
Vlad Yasevich | 5e739d1 | 2008-08-21 03:34:25 -0700 | [diff] [blame] | 5349 | u32 num_chunks = 0; |
Vlad Yasevich | 65b07e5 | 2007-09-16 19:34:00 -0700 | [diff] [blame] | 5350 | char __user *to; |
| 5351 | |
Vlad Yasevich | 5e739d1 | 2008-08-21 03:34:25 -0700 | [diff] [blame] | 5352 | if (!sctp_auth_enable) |
| 5353 | return -EACCES; |
| 5354 | |
| 5355 | if (len < sizeof(struct sctp_authchunks)) |
Vlad Yasevich | 65b07e5 | 2007-09-16 19:34:00 -0700 | [diff] [blame] | 5356 | return -EINVAL; |
| 5357 | |
Vlad Yasevich | 5e739d1 | 2008-08-21 03:34:25 -0700 | [diff] [blame] | 5358 | if (copy_from_user(&val, optval, sizeof(struct sctp_authchunks))) |
Vlad Yasevich | 65b07e5 | 2007-09-16 19:34:00 -0700 | [diff] [blame] | 5359 | return -EFAULT; |
| 5360 | |
Al Viro | 411223c | 2007-10-14 19:21:20 +0100 | [diff] [blame] | 5361 | to = p->gauth_chunks; |
Vlad Yasevich | 65b07e5 | 2007-09-16 19:34:00 -0700 | [diff] [blame] | 5362 | asoc = sctp_id2assoc(sk, val.gauth_assoc_id); |
| 5363 | if (!asoc && val.gauth_assoc_id && sctp_style(sk, UDP)) |
| 5364 | return -EINVAL; |
| 5365 | |
| 5366 | if (asoc) |
| 5367 | ch = (struct sctp_chunks_param*)asoc->c.auth_chunks; |
| 5368 | else |
| 5369 | ch = sctp_sk(sk)->ep->auth_chunk_list; |
| 5370 | |
Vlad Yasevich | 5e739d1 | 2008-08-21 03:34:25 -0700 | [diff] [blame] | 5371 | if (!ch) |
| 5372 | goto num; |
| 5373 | |
Vlad Yasevich | b40db68 | 2008-02-27 14:40:37 -0500 | [diff] [blame] | 5374 | num_chunks = ntohs(ch->param_hdr.length) - sizeof(sctp_paramhdr_t); |
Vlad Yasevich | 5e739d1 | 2008-08-21 03:34:25 -0700 | [diff] [blame] | 5375 | if (len < sizeof(struct sctp_authchunks) + num_chunks) |
Vlad Yasevich | 65b07e5 | 2007-09-16 19:34:00 -0700 | [diff] [blame] | 5376 | return -EINVAL; |
| 5377 | |
Vlad Yasevich | 5e739d1 | 2008-08-21 03:34:25 -0700 | [diff] [blame] | 5378 | if (copy_to_user(to, ch->chunks, num_chunks)) |
| 5379 | return -EFAULT; |
| 5380 | num: |
| 5381 | len = sizeof(struct sctp_authchunks) + num_chunks; |
Vlad Yasevich | 65b07e5 | 2007-09-16 19:34:00 -0700 | [diff] [blame] | 5382 | if (put_user(len, optlen)) |
| 5383 | return -EFAULT; |
Vlad Yasevich | 7e8616d | 2008-02-27 16:04:52 -0500 | [diff] [blame] | 5384 | if (put_user(num_chunks, &p->gauth_number_of_chunks)) |
| 5385 | return -EFAULT; |
Vlad Yasevich | 65b07e5 | 2007-09-16 19:34:00 -0700 | [diff] [blame] | 5386 | |
| 5387 | return 0; |
| 5388 | } |
| 5389 | |
Wei Yongjun | aea3c5c | 2008-12-25 16:57:24 -0800 | [diff] [blame] | 5390 | /* |
| 5391 | * 8.2.5. Get the Current Number of Associations (SCTP_GET_ASSOC_NUMBER) |
| 5392 | * This option gets the current number of associations that are attached |
| 5393 | * to a one-to-many style socket. The option value is an uint32_t. |
| 5394 | */ |
| 5395 | static int sctp_getsockopt_assoc_number(struct sock *sk, int len, |
| 5396 | char __user *optval, int __user *optlen) |
| 5397 | { |
| 5398 | struct sctp_sock *sp = sctp_sk(sk); |
| 5399 | struct sctp_association *asoc; |
| 5400 | u32 val = 0; |
| 5401 | |
| 5402 | if (sctp_style(sk, TCP)) |
| 5403 | return -EOPNOTSUPP; |
| 5404 | |
| 5405 | if (len < sizeof(u32)) |
| 5406 | return -EINVAL; |
| 5407 | |
| 5408 | len = sizeof(u32); |
| 5409 | |
| 5410 | list_for_each_entry(asoc, &(sp->ep->asocs), asocs) { |
| 5411 | val++; |
| 5412 | } |
| 5413 | |
| 5414 | if (put_user(len, optlen)) |
| 5415 | return -EFAULT; |
| 5416 | if (copy_to_user(optval, &val, len)) |
| 5417 | return -EFAULT; |
| 5418 | |
| 5419 | return 0; |
| 5420 | } |
| 5421 | |
Wei Yongjun | 209ba42 | 2011-04-17 17:27:08 +0000 | [diff] [blame] | 5422 | /* |
Michio Honda | 7dc04d7 | 2011-04-26 20:16:31 +0900 | [diff] [blame] | 5423 | * 8.1.23 SCTP_AUTO_ASCONF |
| 5424 | * See the corresponding setsockopt entry as description |
| 5425 | */ |
| 5426 | static int sctp_getsockopt_auto_asconf(struct sock *sk, int len, |
| 5427 | char __user *optval, int __user *optlen) |
| 5428 | { |
| 5429 | int val = 0; |
| 5430 | |
| 5431 | if (len < sizeof(int)) |
| 5432 | return -EINVAL; |
| 5433 | |
| 5434 | len = sizeof(int); |
| 5435 | if (sctp_sk(sk)->do_auto_asconf && sctp_is_ep_boundall(sk)) |
| 5436 | val = 1; |
| 5437 | if (put_user(len, optlen)) |
| 5438 | return -EFAULT; |
| 5439 | if (copy_to_user(optval, &val, len)) |
| 5440 | return -EFAULT; |
| 5441 | return 0; |
| 5442 | } |
| 5443 | |
| 5444 | /* |
Wei Yongjun | 209ba42 | 2011-04-17 17:27:08 +0000 | [diff] [blame] | 5445 | * 8.2.6. Get the Current Identifiers of Associations |
| 5446 | * (SCTP_GET_ASSOC_ID_LIST) |
| 5447 | * |
| 5448 | * This option gets the current list of SCTP association identifiers of |
| 5449 | * the SCTP associations handled by a one-to-many style socket. |
| 5450 | */ |
| 5451 | static int sctp_getsockopt_assoc_ids(struct sock *sk, int len, |
| 5452 | char __user *optval, int __user *optlen) |
| 5453 | { |
| 5454 | struct sctp_sock *sp = sctp_sk(sk); |
| 5455 | struct sctp_association *asoc; |
| 5456 | struct sctp_assoc_ids *ids; |
| 5457 | u32 num = 0; |
| 5458 | |
| 5459 | if (sctp_style(sk, TCP)) |
| 5460 | return -EOPNOTSUPP; |
| 5461 | |
| 5462 | if (len < sizeof(struct sctp_assoc_ids)) |
| 5463 | return -EINVAL; |
| 5464 | |
| 5465 | list_for_each_entry(asoc, &(sp->ep->asocs), asocs) { |
| 5466 | num++; |
| 5467 | } |
| 5468 | |
| 5469 | if (len < sizeof(struct sctp_assoc_ids) + sizeof(sctp_assoc_t) * num) |
| 5470 | return -EINVAL; |
| 5471 | |
| 5472 | len = sizeof(struct sctp_assoc_ids) + sizeof(sctp_assoc_t) * num; |
| 5473 | |
| 5474 | ids = kmalloc(len, GFP_KERNEL); |
| 5475 | if (unlikely(!ids)) |
| 5476 | return -ENOMEM; |
| 5477 | |
| 5478 | ids->gaids_number_of_ids = num; |
| 5479 | num = 0; |
| 5480 | list_for_each_entry(asoc, &(sp->ep->asocs), asocs) { |
| 5481 | ids->gaids_assoc_id[num++] = asoc->assoc_id; |
| 5482 | } |
| 5483 | |
| 5484 | if (put_user(len, optlen) || copy_to_user(optval, ids, len)) { |
| 5485 | kfree(ids); |
| 5486 | return -EFAULT; |
| 5487 | } |
| 5488 | |
| 5489 | kfree(ids); |
| 5490 | return 0; |
| 5491 | } |
| 5492 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5493 | SCTP_STATIC int sctp_getsockopt(struct sock *sk, int level, int optname, |
| 5494 | char __user *optval, int __user *optlen) |
| 5495 | { |
| 5496 | int retval = 0; |
| 5497 | int len; |
| 5498 | |
Frank Filz | 3f7a87d | 2005-06-20 13:14:57 -0700 | [diff] [blame] | 5499 | SCTP_DEBUG_PRINTK("sctp_getsockopt(sk: %p... optname: %d)\n", |
| 5500 | sk, optname); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5501 | |
| 5502 | /* I can hardly begin to describe how wrong this is. This is |
| 5503 | * so broken as to be worse than useless. The API draft |
| 5504 | * REALLY is NOT helpful here... I am not convinced that the |
| 5505 | * semantics of getsockopt() with a level OTHER THAN SOL_SCTP |
| 5506 | * are at all well-founded. |
| 5507 | */ |
| 5508 | if (level != SOL_SCTP) { |
| 5509 | struct sctp_af *af = sctp_sk(sk)->pf->af; |
| 5510 | |
| 5511 | retval = af->getsockopt(sk, level, optname, optval, optlen); |
| 5512 | return retval; |
| 5513 | } |
| 5514 | |
| 5515 | if (get_user(len, optlen)) |
| 5516 | return -EFAULT; |
| 5517 | |
| 5518 | sctp_lock_sock(sk); |
| 5519 | |
| 5520 | switch (optname) { |
| 5521 | case SCTP_STATUS: |
| 5522 | retval = sctp_getsockopt_sctp_status(sk, len, optval, optlen); |
| 5523 | break; |
| 5524 | case SCTP_DISABLE_FRAGMENTS: |
| 5525 | retval = sctp_getsockopt_disable_fragments(sk, len, optval, |
| 5526 | optlen); |
| 5527 | break; |
| 5528 | case SCTP_EVENTS: |
| 5529 | retval = sctp_getsockopt_events(sk, len, optval, optlen); |
| 5530 | break; |
| 5531 | case SCTP_AUTOCLOSE: |
| 5532 | retval = sctp_getsockopt_autoclose(sk, len, optval, optlen); |
| 5533 | break; |
| 5534 | case SCTP_SOCKOPT_PEELOFF: |
| 5535 | retval = sctp_getsockopt_peeloff(sk, len, optval, optlen); |
| 5536 | break; |
| 5537 | case SCTP_PEER_ADDR_PARAMS: |
| 5538 | retval = sctp_getsockopt_peer_addr_params(sk, len, optval, |
| 5539 | optlen); |
| 5540 | break; |
Shan Wei | 4580ccc | 2011-01-18 22:39:00 +0000 | [diff] [blame] | 5541 | case SCTP_DELAYED_SACK: |
Wei Yongjun | d364d92 | 2008-05-09 15:13:26 -0700 | [diff] [blame] | 5542 | retval = sctp_getsockopt_delayed_ack(sk, len, optval, |
Frank Filz | 7708610 | 2005-12-22 11:37:30 -0800 | [diff] [blame] | 5543 | optlen); |
| 5544 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5545 | case SCTP_INITMSG: |
| 5546 | retval = sctp_getsockopt_initmsg(sk, len, optval, optlen); |
| 5547 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5548 | case SCTP_GET_PEER_ADDRS: |
| 5549 | retval = sctp_getsockopt_peer_addrs(sk, len, optval, |
| 5550 | optlen); |
| 5551 | break; |
| 5552 | case SCTP_GET_LOCAL_ADDRS: |
| 5553 | retval = sctp_getsockopt_local_addrs(sk, len, optval, |
| 5554 | optlen); |
| 5555 | break; |
Vlad Yasevich | c6ba68a | 2009-06-01 12:41:15 -0400 | [diff] [blame] | 5556 | case SCTP_SOCKOPT_CONNECTX3: |
| 5557 | retval = sctp_getsockopt_connectx3(sk, len, optval, optlen); |
| 5558 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5559 | case SCTP_DEFAULT_SEND_PARAM: |
| 5560 | retval = sctp_getsockopt_default_send_param(sk, len, |
| 5561 | optval, optlen); |
| 5562 | break; |
| 5563 | case SCTP_PRIMARY_ADDR: |
| 5564 | retval = sctp_getsockopt_primary_addr(sk, len, optval, optlen); |
| 5565 | break; |
| 5566 | case SCTP_NODELAY: |
| 5567 | retval = sctp_getsockopt_nodelay(sk, len, optval, optlen); |
| 5568 | break; |
| 5569 | case SCTP_RTOINFO: |
| 5570 | retval = sctp_getsockopt_rtoinfo(sk, len, optval, optlen); |
| 5571 | break; |
| 5572 | case SCTP_ASSOCINFO: |
| 5573 | retval = sctp_getsockopt_associnfo(sk, len, optval, optlen); |
| 5574 | break; |
| 5575 | case SCTP_I_WANT_MAPPED_V4_ADDR: |
| 5576 | retval = sctp_getsockopt_mappedv4(sk, len, optval, optlen); |
| 5577 | break; |
| 5578 | case SCTP_MAXSEG: |
| 5579 | retval = sctp_getsockopt_maxseg(sk, len, optval, optlen); |
| 5580 | break; |
| 5581 | case SCTP_GET_PEER_ADDR_INFO: |
| 5582 | retval = sctp_getsockopt_peer_addr_info(sk, len, optval, |
| 5583 | optlen); |
| 5584 | break; |
Ivan Skytte Jorgensen | 0f3fffd | 2006-12-20 16:07:04 -0800 | [diff] [blame] | 5585 | case SCTP_ADAPTATION_LAYER: |
| 5586 | retval = sctp_getsockopt_adaptation_layer(sk, len, optval, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5587 | optlen); |
| 5588 | break; |
Ivan Skytte Jorgensen | 6ab792f | 2006-12-13 16:34:22 -0800 | [diff] [blame] | 5589 | case SCTP_CONTEXT: |
| 5590 | retval = sctp_getsockopt_context(sk, len, optval, optlen); |
| 5591 | break; |
Vlad Yasevich | b6e1331 | 2007-04-20 12:23:15 -0700 | [diff] [blame] | 5592 | case SCTP_FRAGMENT_INTERLEAVE: |
| 5593 | retval = sctp_getsockopt_fragment_interleave(sk, len, optval, |
| 5594 | optlen); |
| 5595 | break; |
Vlad Yasevich | d49d91d | 2007-03-23 11:32:00 -0700 | [diff] [blame] | 5596 | case SCTP_PARTIAL_DELIVERY_POINT: |
| 5597 | retval = sctp_getsockopt_partial_delivery_point(sk, len, optval, |
| 5598 | optlen); |
| 5599 | break; |
Vlad Yasevich | 7033157 | 2007-03-23 11:34:36 -0700 | [diff] [blame] | 5600 | case SCTP_MAX_BURST: |
| 5601 | retval = sctp_getsockopt_maxburst(sk, len, optval, optlen); |
| 5602 | break; |
Vlad Yasevich | 65b07e5 | 2007-09-16 19:34:00 -0700 | [diff] [blame] | 5603 | case SCTP_AUTH_KEY: |
| 5604 | case SCTP_AUTH_CHUNK: |
| 5605 | case SCTP_AUTH_DELETE_KEY: |
| 5606 | retval = -EOPNOTSUPP; |
| 5607 | break; |
| 5608 | case SCTP_HMAC_IDENT: |
| 5609 | retval = sctp_getsockopt_hmac_ident(sk, len, optval, optlen); |
| 5610 | break; |
| 5611 | case SCTP_AUTH_ACTIVE_KEY: |
| 5612 | retval = sctp_getsockopt_active_key(sk, len, optval, optlen); |
| 5613 | break; |
| 5614 | case SCTP_PEER_AUTH_CHUNKS: |
| 5615 | retval = sctp_getsockopt_peer_auth_chunks(sk, len, optval, |
| 5616 | optlen); |
| 5617 | break; |
| 5618 | case SCTP_LOCAL_AUTH_CHUNKS: |
| 5619 | retval = sctp_getsockopt_local_auth_chunks(sk, len, optval, |
| 5620 | optlen); |
| 5621 | break; |
Wei Yongjun | aea3c5c | 2008-12-25 16:57:24 -0800 | [diff] [blame] | 5622 | case SCTP_GET_ASSOC_NUMBER: |
| 5623 | retval = sctp_getsockopt_assoc_number(sk, len, optval, optlen); |
| 5624 | break; |
Wei Yongjun | 209ba42 | 2011-04-17 17:27:08 +0000 | [diff] [blame] | 5625 | case SCTP_GET_ASSOC_ID_LIST: |
| 5626 | retval = sctp_getsockopt_assoc_ids(sk, len, optval, optlen); |
| 5627 | break; |
Michio Honda | 7dc04d7 | 2011-04-26 20:16:31 +0900 | [diff] [blame] | 5628 | case SCTP_AUTO_ASCONF: |
| 5629 | retval = sctp_getsockopt_auto_asconf(sk, len, optval, optlen); |
| 5630 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5631 | default: |
| 5632 | retval = -ENOPROTOOPT; |
| 5633 | break; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 5634 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5635 | |
| 5636 | sctp_release_sock(sk); |
| 5637 | return retval; |
| 5638 | } |
| 5639 | |
| 5640 | static void sctp_hash(struct sock *sk) |
| 5641 | { |
| 5642 | /* STUB */ |
| 5643 | } |
| 5644 | |
| 5645 | static void sctp_unhash(struct sock *sk) |
| 5646 | { |
| 5647 | /* STUB */ |
| 5648 | } |
| 5649 | |
| 5650 | /* Check if port is acceptable. Possibly find first available port. |
| 5651 | * |
| 5652 | * The port hash table (contained in the 'global' SCTP protocol storage |
| 5653 | * returned by struct sctp_protocol *sctp_get_protocol()). The hash |
| 5654 | * table is an array of 4096 lists (sctp_bind_hashbucket). Each |
| 5655 | * list (the list number is the port number hashed out, so as you |
| 5656 | * would expect from a hash function, all the ports in a given list have |
| 5657 | * such a number that hashes out to the same list number; you were |
| 5658 | * expecting that, right?); so each list has a set of ports, with a |
| 5659 | * link to the socket (struct sock) that uses it, the port number and |
| 5660 | * a fastreuse flag (FIXME: NPI ipg). |
| 5661 | */ |
| 5662 | static struct sctp_bind_bucket *sctp_bucket_create( |
| 5663 | struct sctp_bind_hashbucket *head, unsigned short snum); |
| 5664 | |
| 5665 | static long sctp_get_port_local(struct sock *sk, union sctp_addr *addr) |
| 5666 | { |
| 5667 | struct sctp_bind_hashbucket *head; /* hash list */ |
| 5668 | struct sctp_bind_bucket *pp; /* hash list port iterator */ |
Vlad Yasevich | d970dbf | 2007-11-09 11:43:40 -0500 | [diff] [blame] | 5669 | struct hlist_node *node; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5670 | unsigned short snum; |
| 5671 | int ret; |
| 5672 | |
Al Viro | 04afd8b | 2006-11-20 17:02:01 -0800 | [diff] [blame] | 5673 | snum = ntohs(addr->v4.sin_port); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5674 | |
| 5675 | SCTP_DEBUG_PRINTK("sctp_get_port() begins, snum=%d\n", snum); |
| 5676 | sctp_local_bh_disable(); |
| 5677 | |
| 5678 | if (snum == 0) { |
Stephen Hemminger | 0639300 | 2007-10-10 17:30:18 -0700 | [diff] [blame] | 5679 | /* Search for an available port. */ |
Stephen Hemminger | 227b60f | 2007-10-10 17:30:46 -0700 | [diff] [blame] | 5680 | int low, high, remaining, index; |
| 5681 | unsigned int rover; |
| 5682 | |
| 5683 | inet_get_local_port_range(&low, &high); |
| 5684 | remaining = (high - low) + 1; |
| 5685 | rover = net_random() % remaining + low; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5686 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5687 | do { |
| 5688 | rover++; |
| 5689 | if ((rover < low) || (rover > high)) |
| 5690 | rover = low; |
Amerigo Wang | e3826f1 | 2010-05-05 00:27:06 +0000 | [diff] [blame] | 5691 | if (inet_is_reserved_local_port(rover)) |
| 5692 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5693 | index = sctp_phashfn(rover); |
| 5694 | head = &sctp_port_hashtable[index]; |
| 5695 | sctp_spin_lock(&head->lock); |
Vlad Yasevich | d970dbf | 2007-11-09 11:43:40 -0500 | [diff] [blame] | 5696 | sctp_for_each_hentry(pp, node, &head->chain) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5697 | if (pp->port == rover) |
| 5698 | goto next; |
| 5699 | break; |
| 5700 | next: |
| 5701 | sctp_spin_unlock(&head->lock); |
| 5702 | } while (--remaining > 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5703 | |
| 5704 | /* Exhausted local port range during search? */ |
| 5705 | ret = 1; |
| 5706 | if (remaining <= 0) |
| 5707 | goto fail; |
| 5708 | |
| 5709 | /* OK, here is the one we will use. HEAD (the port |
| 5710 | * hash table list entry) is non-NULL and we hold it's |
| 5711 | * mutex. |
| 5712 | */ |
| 5713 | snum = rover; |
| 5714 | } else { |
| 5715 | /* We are given an specific port number; we verify |
| 5716 | * that it is not being used. If it is used, we will |
| 5717 | * exahust the search in the hash list corresponding |
| 5718 | * to the port number (snum) - we detect that with the |
| 5719 | * port iterator, pp being NULL. |
| 5720 | */ |
| 5721 | head = &sctp_port_hashtable[sctp_phashfn(snum)]; |
| 5722 | sctp_spin_lock(&head->lock); |
Vlad Yasevich | d970dbf | 2007-11-09 11:43:40 -0500 | [diff] [blame] | 5723 | sctp_for_each_hentry(pp, node, &head->chain) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5724 | if (pp->port == snum) |
| 5725 | goto pp_found; |
| 5726 | } |
| 5727 | } |
| 5728 | pp = NULL; |
| 5729 | goto pp_not_found; |
| 5730 | pp_found: |
| 5731 | if (!hlist_empty(&pp->owner)) { |
| 5732 | /* We had a port hash table hit - there is an |
| 5733 | * available port (pp != NULL) and it is being |
| 5734 | * used by other socket (pp->owner not empty); that other |
| 5735 | * socket is going to be sk2. |
| 5736 | */ |
| 5737 | int reuse = sk->sk_reuse; |
| 5738 | struct sock *sk2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5739 | |
| 5740 | SCTP_DEBUG_PRINTK("sctp_get_port() found a possible match\n"); |
Vlad Yasevich | ce5325c | 2007-05-04 13:34:49 -0700 | [diff] [blame] | 5741 | if (pp->fastreuse && sk->sk_reuse && |
| 5742 | sk->sk_state != SCTP_SS_LISTENING) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5743 | goto success; |
| 5744 | |
| 5745 | /* Run through the list of sockets bound to the port |
| 5746 | * (pp->port) [via the pointers bind_next and |
| 5747 | * bind_pprev in the struct sock *sk2 (pp->sk)]. On each one, |
| 5748 | * we get the endpoint they describe and run through |
| 5749 | * the endpoint's list of IP (v4 or v6) addresses, |
| 5750 | * comparing each of the addresses with the address of |
| 5751 | * the socket sk. If we find a match, then that means |
| 5752 | * that this port/socket (sk) combination are already |
| 5753 | * in an endpoint. |
| 5754 | */ |
| 5755 | sk_for_each_bound(sk2, node, &pp->owner) { |
| 5756 | struct sctp_endpoint *ep2; |
| 5757 | ep2 = sctp_sk(sk2)->ep; |
| 5758 | |
Vlad Yasevich | 4e54064 | 2008-07-18 23:06:32 -0700 | [diff] [blame] | 5759 | if (sk == sk2 || |
| 5760 | (reuse && sk2->sk_reuse && |
| 5761 | sk2->sk_state != SCTP_SS_LISTENING)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5762 | continue; |
| 5763 | |
Vlad Yasevich | 7dab83d | 2008-07-18 23:05:40 -0700 | [diff] [blame] | 5764 | if (sctp_bind_addr_conflict(&ep2->base.bind_addr, addr, |
| 5765 | sctp_sk(sk2), sctp_sk(sk))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5766 | ret = (long)sk2; |
| 5767 | goto fail_unlock; |
| 5768 | } |
| 5769 | } |
| 5770 | SCTP_DEBUG_PRINTK("sctp_get_port(): Found a match\n"); |
| 5771 | } |
| 5772 | pp_not_found: |
| 5773 | /* If there was a hash table miss, create a new port. */ |
| 5774 | ret = 1; |
| 5775 | if (!pp && !(pp = sctp_bucket_create(head, snum))) |
| 5776 | goto fail_unlock; |
| 5777 | |
| 5778 | /* In either case (hit or miss), make sure fastreuse is 1 only |
| 5779 | * if sk->sk_reuse is too (that is, if the caller requested |
| 5780 | * SO_REUSEADDR on this socket -sk-). |
| 5781 | */ |
Vlad Yasevich | ce5325c | 2007-05-04 13:34:49 -0700 | [diff] [blame] | 5782 | if (hlist_empty(&pp->owner)) { |
| 5783 | if (sk->sk_reuse && sk->sk_state != SCTP_SS_LISTENING) |
| 5784 | pp->fastreuse = 1; |
| 5785 | else |
| 5786 | pp->fastreuse = 0; |
| 5787 | } else if (pp->fastreuse && |
| 5788 | (!sk->sk_reuse || sk->sk_state == SCTP_SS_LISTENING)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5789 | pp->fastreuse = 0; |
| 5790 | |
| 5791 | /* We are set, so fill up all the data in the hash table |
| 5792 | * entry, tie the socket list information with the rest of the |
| 5793 | * sockets FIXME: Blurry, NPI (ipg). |
| 5794 | */ |
| 5795 | success: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5796 | if (!sctp_sk(sk)->bind_hash) { |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 5797 | inet_sk(sk)->inet_num = snum; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5798 | sk_add_bind_node(sk, &pp->owner); |
| 5799 | sctp_sk(sk)->bind_hash = pp; |
| 5800 | } |
| 5801 | ret = 0; |
| 5802 | |
| 5803 | fail_unlock: |
| 5804 | sctp_spin_unlock(&head->lock); |
| 5805 | |
| 5806 | fail: |
| 5807 | sctp_local_bh_enable(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5808 | return ret; |
| 5809 | } |
| 5810 | |
| 5811 | /* Assign a 'snum' port to the socket. If snum == 0, an ephemeral |
| 5812 | * port is requested. |
| 5813 | */ |
| 5814 | static int sctp_get_port(struct sock *sk, unsigned short snum) |
| 5815 | { |
| 5816 | long ret; |
| 5817 | union sctp_addr addr; |
| 5818 | struct sctp_af *af = sctp_sk(sk)->pf->af; |
| 5819 | |
| 5820 | /* Set up a dummy address struct from the sk. */ |
| 5821 | af->from_sk(&addr, sk); |
| 5822 | addr.v4.sin_port = htons(snum); |
| 5823 | |
| 5824 | /* Note: sk->sk_num gets filled in if ephemeral port request. */ |
| 5825 | ret = sctp_get_port_local(sk, &addr); |
| 5826 | |
Eric Dumazet | a02cec2 | 2010-09-22 20:43:57 +0000 | [diff] [blame] | 5827 | return ret ? 1 : 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5828 | } |
| 5829 | |
| 5830 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5831 | * Move a socket to LISTENING state. |
| 5832 | */ |
Vlad Yasevich | 5e8f3f7 | 2009-03-12 09:49:17 +0000 | [diff] [blame] | 5833 | SCTP_STATIC int sctp_listen_start(struct sock *sk, int backlog) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5834 | { |
Vlad Yasevich | 5e8f3f7 | 2009-03-12 09:49:17 +0000 | [diff] [blame] | 5835 | struct sctp_sock *sp = sctp_sk(sk); |
| 5836 | struct sctp_endpoint *ep = sp->ep; |
Herbert Xu | 1b489e1 | 2006-08-20 15:07:14 +1000 | [diff] [blame] | 5837 | struct crypto_hash *tfm = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5838 | |
| 5839 | /* Allocate HMAC for generating cookie. */ |
Vlad Yasevich | 23b29ed | 2008-07-18 23:06:07 -0700 | [diff] [blame] | 5840 | if (!sctp_sk(sk)->hmac && sctp_hmac_alg) { |
Herbert Xu | 1b489e1 | 2006-08-20 15:07:14 +1000 | [diff] [blame] | 5841 | tfm = crypto_alloc_hash(sctp_hmac_alg, 0, CRYPTO_ALG_ASYNC); |
Vlad Yasevich | 8dc4984 | 2007-05-09 13:50:20 -0700 | [diff] [blame] | 5842 | if (IS_ERR(tfm)) { |
| 5843 | if (net_ratelimit()) { |
Joe Perches | 145ce50 | 2010-08-24 13:21:08 +0000 | [diff] [blame] | 5844 | pr_info("failed to load transform for %s: %ld\n", |
Vlad Yasevich | 8dc4984 | 2007-05-09 13:50:20 -0700 | [diff] [blame] | 5845 | sctp_hmac_alg, PTR_ERR(tfm)); |
| 5846 | } |
Vlad Yasevich | 5e8f3f7 | 2009-03-12 09:49:17 +0000 | [diff] [blame] | 5847 | return -ENOSYS; |
| 5848 | } |
| 5849 | sctp_sk(sk)->hmac = tfm; |
| 5850 | } |
| 5851 | |
| 5852 | /* |
| 5853 | * If a bind() or sctp_bindx() is not called prior to a listen() |
| 5854 | * call that allows new associations to be accepted, the system |
| 5855 | * picks an ephemeral port and will choose an address set equivalent |
| 5856 | * to binding with a wildcard address. |
| 5857 | * |
| 5858 | * This is not currently spelled out in the SCTP sockets |
| 5859 | * extensions draft, but follows the practice as seen in TCP |
| 5860 | * sockets. |
| 5861 | * |
| 5862 | */ |
| 5863 | sk->sk_state = SCTP_SS_LISTENING; |
| 5864 | if (!ep->base.bind_addr.port) { |
| 5865 | if (sctp_autobind(sk)) |
| 5866 | return -EAGAIN; |
| 5867 | } else { |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 5868 | if (sctp_get_port(sk, inet_sk(sk)->inet_num)) { |
Vlad Yasevich | 5e8f3f7 | 2009-03-12 09:49:17 +0000 | [diff] [blame] | 5869 | sk->sk_state = SCTP_SS_CLOSED; |
| 5870 | return -EADDRINUSE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5871 | } |
| 5872 | } |
| 5873 | |
Vlad Yasevich | 5e8f3f7 | 2009-03-12 09:49:17 +0000 | [diff] [blame] | 5874 | sk->sk_max_ack_backlog = backlog; |
| 5875 | sctp_hash_endpoint(ep); |
| 5876 | return 0; |
| 5877 | } |
| 5878 | |
| 5879 | /* |
| 5880 | * 4.1.3 / 5.1.3 listen() |
| 5881 | * |
| 5882 | * By default, new associations are not accepted for UDP style sockets. |
| 5883 | * An application uses listen() to mark a socket as being able to |
| 5884 | * accept new associations. |
| 5885 | * |
| 5886 | * On TCP style sockets, applications use listen() to ready the SCTP |
| 5887 | * endpoint for accepting inbound associations. |
| 5888 | * |
| 5889 | * On both types of endpoints a backlog of '0' disables listening. |
| 5890 | * |
| 5891 | * Move a socket to LISTENING state. |
| 5892 | */ |
| 5893 | int sctp_inet_listen(struct socket *sock, int backlog) |
| 5894 | { |
| 5895 | struct sock *sk = sock->sk; |
| 5896 | struct sctp_endpoint *ep = sctp_sk(sk)->ep; |
| 5897 | int err = -EINVAL; |
| 5898 | |
| 5899 | if (unlikely(backlog < 0)) |
| 5900 | return err; |
| 5901 | |
| 5902 | sctp_lock_sock(sk); |
| 5903 | |
| 5904 | /* Peeled-off sockets are not allowed to listen(). */ |
| 5905 | if (sctp_style(sk, UDP_HIGH_BANDWIDTH)) |
| 5906 | goto out; |
| 5907 | |
| 5908 | if (sock->state != SS_UNCONNECTED) |
| 5909 | goto out; |
| 5910 | |
| 5911 | /* If backlog is zero, disable listening. */ |
| 5912 | if (!backlog) { |
| 5913 | if (sctp_sstate(sk, CLOSED)) |
| 5914 | goto out; |
| 5915 | |
| 5916 | err = 0; |
| 5917 | sctp_unhash_endpoint(ep); |
| 5918 | sk->sk_state = SCTP_SS_CLOSED; |
| 5919 | if (sk->sk_reuse) |
| 5920 | sctp_sk(sk)->bind_hash->fastreuse = 1; |
| 5921 | goto out; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 5922 | } |
| 5923 | |
Vlad Yasevich | 5e8f3f7 | 2009-03-12 09:49:17 +0000 | [diff] [blame] | 5924 | /* If we are already listening, just update the backlog */ |
| 5925 | if (sctp_sstate(sk, LISTENING)) |
| 5926 | sk->sk_max_ack_backlog = backlog; |
| 5927 | else { |
| 5928 | err = sctp_listen_start(sk, backlog); |
| 5929 | if (err) |
| 5930 | goto out; |
| 5931 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5932 | |
Vlad Yasevich | 5e8f3f7 | 2009-03-12 09:49:17 +0000 | [diff] [blame] | 5933 | err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5934 | out: |
| 5935 | sctp_release_sock(sk); |
| 5936 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5937 | } |
| 5938 | |
| 5939 | /* |
| 5940 | * This function is done by modeling the current datagram_poll() and the |
| 5941 | * tcp_poll(). Note that, based on these implementations, we don't |
| 5942 | * lock the socket in this function, even though it seems that, |
| 5943 | * ideally, locking or some other mechanisms can be used to ensure |
Neil Horman | 9bffc4a | 2005-12-19 14:24:40 -0800 | [diff] [blame] | 5944 | * the integrity of the counters (sndbuf and wmem_alloc) used |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5945 | * in this place. We assume that we don't need locks either until proven |
| 5946 | * otherwise. |
| 5947 | * |
| 5948 | * Another thing to note is that we include the Async I/O support |
| 5949 | * here, again, by modeling the current TCP/UDP code. We don't have |
| 5950 | * a good way to test with it yet. |
| 5951 | */ |
| 5952 | unsigned int sctp_poll(struct file *file, struct socket *sock, poll_table *wait) |
| 5953 | { |
| 5954 | struct sock *sk = sock->sk; |
| 5955 | struct sctp_sock *sp = sctp_sk(sk); |
| 5956 | unsigned int mask; |
| 5957 | |
Eric Dumazet | aa39514 | 2010-04-20 13:03:51 +0000 | [diff] [blame] | 5958 | poll_wait(file, sk_sleep(sk), wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5959 | |
| 5960 | /* A TCP-style listening socket becomes readable when the accept queue |
| 5961 | * is not empty. |
| 5962 | */ |
| 5963 | if (sctp_style(sk, TCP) && sctp_sstate(sk, LISTENING)) |
| 5964 | return (!list_empty(&sp->ep->asocs)) ? |
YOSHIFUJI Hideaki | d808ad9 | 2007-02-09 23:25:18 +0900 | [diff] [blame] | 5965 | (POLLIN | POLLRDNORM) : 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5966 | |
| 5967 | mask = 0; |
| 5968 | |
| 5969 | /* Is there any exceptional events? */ |
| 5970 | if (sk->sk_err || !skb_queue_empty(&sk->sk_error_queue)) |
| 5971 | mask |= POLLERR; |
Davide Libenzi | f348d70 | 2006-03-25 03:07:39 -0800 | [diff] [blame] | 5972 | if (sk->sk_shutdown & RCV_SHUTDOWN) |
Eric Dumazet | db40980 | 2010-09-06 11:13:50 +0000 | [diff] [blame] | 5973 | mask |= POLLRDHUP | POLLIN | POLLRDNORM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5974 | if (sk->sk_shutdown == SHUTDOWN_MASK) |
| 5975 | mask |= POLLHUP; |
| 5976 | |
| 5977 | /* Is it readable? Reconsider this code with TCP-style support. */ |
Eric Dumazet | db40980 | 2010-09-06 11:13:50 +0000 | [diff] [blame] | 5978 | if (!skb_queue_empty(&sk->sk_receive_queue)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5979 | mask |= POLLIN | POLLRDNORM; |
| 5980 | |
| 5981 | /* The association is either gone or not ready. */ |
| 5982 | if (!sctp_style(sk, UDP) && sctp_sstate(sk, CLOSED)) |
| 5983 | return mask; |
| 5984 | |
| 5985 | /* Is it writable? */ |
| 5986 | if (sctp_writeable(sk)) { |
| 5987 | mask |= POLLOUT | POLLWRNORM; |
| 5988 | } else { |
| 5989 | set_bit(SOCK_ASYNC_NOSPACE, &sk->sk_socket->flags); |
| 5990 | /* |
| 5991 | * Since the socket is not locked, the buffer |
| 5992 | * might be made available after the writeable check and |
| 5993 | * before the bit is set. This could cause a lost I/O |
| 5994 | * signal. tcp_poll() has a race breaker for this race |
| 5995 | * condition. Based on their implementation, we put |
| 5996 | * in the following code to cover it as well. |
| 5997 | */ |
| 5998 | if (sctp_writeable(sk)) |
| 5999 | mask |= POLLOUT | POLLWRNORM; |
| 6000 | } |
| 6001 | return mask; |
| 6002 | } |
| 6003 | |
| 6004 | /******************************************************************** |
| 6005 | * 2nd Level Abstractions |
| 6006 | ********************************************************************/ |
| 6007 | |
| 6008 | static struct sctp_bind_bucket *sctp_bucket_create( |
| 6009 | struct sctp_bind_hashbucket *head, unsigned short snum) |
| 6010 | { |
| 6011 | struct sctp_bind_bucket *pp; |
| 6012 | |
Christoph Lameter | 54e6ecb | 2006-12-06 20:33:16 -0800 | [diff] [blame] | 6013 | pp = kmem_cache_alloc(sctp_bucket_cachep, GFP_ATOMIC); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6014 | if (pp) { |
Li Zefan | 935a7f6 | 2008-04-10 01:58:06 -0700 | [diff] [blame] | 6015 | SCTP_DBG_OBJCNT_INC(bind_bucket); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6016 | pp->port = snum; |
| 6017 | pp->fastreuse = 0; |
| 6018 | INIT_HLIST_HEAD(&pp->owner); |
Vlad Yasevich | d970dbf | 2007-11-09 11:43:40 -0500 | [diff] [blame] | 6019 | hlist_add_head(&pp->node, &head->chain); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6020 | } |
| 6021 | return pp; |
| 6022 | } |
| 6023 | |
| 6024 | /* Caller must hold hashbucket lock for this tb with local BH disabled */ |
| 6025 | static void sctp_bucket_destroy(struct sctp_bind_bucket *pp) |
| 6026 | { |
Sridhar Samudrala | 37fa687 | 2006-07-21 14:45:47 -0700 | [diff] [blame] | 6027 | if (pp && hlist_empty(&pp->owner)) { |
Vlad Yasevich | d970dbf | 2007-11-09 11:43:40 -0500 | [diff] [blame] | 6028 | __hlist_del(&pp->node); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6029 | kmem_cache_free(sctp_bucket_cachep, pp); |
| 6030 | SCTP_DBG_OBJCNT_DEC(bind_bucket); |
| 6031 | } |
| 6032 | } |
| 6033 | |
| 6034 | /* Release this socket's reference to a local port. */ |
| 6035 | static inline void __sctp_put_port(struct sock *sk) |
| 6036 | { |
| 6037 | struct sctp_bind_hashbucket *head = |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 6038 | &sctp_port_hashtable[sctp_phashfn(inet_sk(sk)->inet_num)]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6039 | struct sctp_bind_bucket *pp; |
| 6040 | |
| 6041 | sctp_spin_lock(&head->lock); |
| 6042 | pp = sctp_sk(sk)->bind_hash; |
| 6043 | __sk_del_bind_node(sk); |
| 6044 | sctp_sk(sk)->bind_hash = NULL; |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 6045 | inet_sk(sk)->inet_num = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6046 | sctp_bucket_destroy(pp); |
| 6047 | sctp_spin_unlock(&head->lock); |
| 6048 | } |
| 6049 | |
| 6050 | void sctp_put_port(struct sock *sk) |
| 6051 | { |
| 6052 | sctp_local_bh_disable(); |
| 6053 | __sctp_put_port(sk); |
| 6054 | sctp_local_bh_enable(); |
| 6055 | } |
| 6056 | |
| 6057 | /* |
| 6058 | * The system picks an ephemeral port and choose an address set equivalent |
| 6059 | * to binding with a wildcard address. |
| 6060 | * One of those addresses will be the primary address for the association. |
| 6061 | * This automatically enables the multihoming capability of SCTP. |
| 6062 | */ |
| 6063 | static int sctp_autobind(struct sock *sk) |
| 6064 | { |
| 6065 | union sctp_addr autoaddr; |
| 6066 | struct sctp_af *af; |
Al Viro | 6fbfa9f | 2006-11-20 17:24:53 -0800 | [diff] [blame] | 6067 | __be16 port; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6068 | |
| 6069 | /* Initialize a local sockaddr structure to INADDR_ANY. */ |
| 6070 | af = sctp_sk(sk)->pf->af; |
| 6071 | |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 6072 | port = htons(inet_sk(sk)->inet_num); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6073 | af->inaddr_any(&autoaddr, port); |
| 6074 | |
| 6075 | return sctp_do_bind(sk, &autoaddr, af->sockaddr_len); |
| 6076 | } |
| 6077 | |
| 6078 | /* Parse out IPPROTO_SCTP CMSG headers. Perform only minimal validation. |
| 6079 | * |
| 6080 | * From RFC 2292 |
| 6081 | * 4.2 The cmsghdr Structure * |
| 6082 | * |
| 6083 | * When ancillary data is sent or received, any number of ancillary data |
| 6084 | * objects can be specified by the msg_control and msg_controllen members of |
| 6085 | * the msghdr structure, because each object is preceded by |
| 6086 | * a cmsghdr structure defining the object's length (the cmsg_len member). |
| 6087 | * Historically Berkeley-derived implementations have passed only one object |
| 6088 | * at a time, but this API allows multiple objects to be |
| 6089 | * passed in a single call to sendmsg() or recvmsg(). The following example |
| 6090 | * shows two ancillary data objects in a control buffer. |
| 6091 | * |
| 6092 | * |<--------------------------- msg_controllen -------------------------->| |
| 6093 | * | | |
| 6094 | * |
| 6095 | * |<----- ancillary data object ----->|<----- ancillary data object ----->| |
| 6096 | * |
| 6097 | * |<---------- CMSG_SPACE() --------->|<---------- CMSG_SPACE() --------->| |
| 6098 | * | | | |
| 6099 | * |
| 6100 | * |<---------- cmsg_len ---------->| |<--------- cmsg_len ----------->| | |
| 6101 | * |
| 6102 | * |<--------- CMSG_LEN() --------->| |<-------- CMSG_LEN() ---------->| | |
| 6103 | * | | | | | |
| 6104 | * |
| 6105 | * +-----+-----+-----+--+-----------+--+-----+-----+-----+--+-----------+--+ |
| 6106 | * |cmsg_|cmsg_|cmsg_|XX| |XX|cmsg_|cmsg_|cmsg_|XX| |XX| |
| 6107 | * |
| 6108 | * |len |level|type |XX|cmsg_data[]|XX|len |level|type |XX|cmsg_data[]|XX| |
| 6109 | * |
| 6110 | * +-----+-----+-----+--+-----------+--+-----+-----+-----+--+-----------+--+ |
| 6111 | * ^ |
| 6112 | * | |
| 6113 | * |
| 6114 | * msg_control |
| 6115 | * points here |
| 6116 | */ |
| 6117 | SCTP_STATIC int sctp_msghdr_parse(const struct msghdr *msg, |
| 6118 | sctp_cmsgs_t *cmsgs) |
| 6119 | { |
| 6120 | struct cmsghdr *cmsg; |
Vlad Yasevich | ab38fb0 | 2008-04-12 18:40:06 -0700 | [diff] [blame] | 6121 | struct msghdr *my_msg = (struct msghdr *)msg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6122 | |
| 6123 | for (cmsg = CMSG_FIRSTHDR(msg); |
| 6124 | cmsg != NULL; |
Vlad Yasevich | ab38fb0 | 2008-04-12 18:40:06 -0700 | [diff] [blame] | 6125 | cmsg = CMSG_NXTHDR(my_msg, cmsg)) { |
| 6126 | if (!CMSG_OK(my_msg, cmsg)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6127 | return -EINVAL; |
| 6128 | |
| 6129 | /* Should we parse this header or ignore? */ |
| 6130 | if (cmsg->cmsg_level != IPPROTO_SCTP) |
| 6131 | continue; |
| 6132 | |
| 6133 | /* Strictly check lengths following example in SCM code. */ |
| 6134 | switch (cmsg->cmsg_type) { |
| 6135 | case SCTP_INIT: |
| 6136 | /* SCTP Socket API Extension |
| 6137 | * 5.2.1 SCTP Initiation Structure (SCTP_INIT) |
| 6138 | * |
| 6139 | * This cmsghdr structure provides information for |
| 6140 | * initializing new SCTP associations with sendmsg(). |
| 6141 | * The SCTP_INITMSG socket option uses this same data |
| 6142 | * structure. This structure is not used for |
| 6143 | * recvmsg(). |
| 6144 | * |
| 6145 | * cmsg_level cmsg_type cmsg_data[] |
| 6146 | * ------------ ------------ ---------------------- |
| 6147 | * IPPROTO_SCTP SCTP_INIT struct sctp_initmsg |
| 6148 | */ |
| 6149 | if (cmsg->cmsg_len != |
| 6150 | CMSG_LEN(sizeof(struct sctp_initmsg))) |
| 6151 | return -EINVAL; |
| 6152 | cmsgs->init = (struct sctp_initmsg *)CMSG_DATA(cmsg); |
| 6153 | break; |
| 6154 | |
| 6155 | case SCTP_SNDRCV: |
| 6156 | /* SCTP Socket API Extension |
| 6157 | * 5.2.2 SCTP Header Information Structure(SCTP_SNDRCV) |
| 6158 | * |
| 6159 | * This cmsghdr structure specifies SCTP options for |
| 6160 | * sendmsg() and describes SCTP header information |
| 6161 | * about a received message through recvmsg(). |
| 6162 | * |
| 6163 | * cmsg_level cmsg_type cmsg_data[] |
| 6164 | * ------------ ------------ ---------------------- |
| 6165 | * IPPROTO_SCTP SCTP_SNDRCV struct sctp_sndrcvinfo |
| 6166 | */ |
| 6167 | if (cmsg->cmsg_len != |
| 6168 | CMSG_LEN(sizeof(struct sctp_sndrcvinfo))) |
| 6169 | return -EINVAL; |
| 6170 | |
| 6171 | cmsgs->info = |
| 6172 | (struct sctp_sndrcvinfo *)CMSG_DATA(cmsg); |
| 6173 | |
| 6174 | /* Minimally, validate the sinfo_flags. */ |
| 6175 | if (cmsgs->info->sinfo_flags & |
Ivan Skytte Jorgensen | eaa5c54 | 2005-10-28 15:10:00 -0700 | [diff] [blame] | 6176 | ~(SCTP_UNORDERED | SCTP_ADDR_OVER | |
| 6177 | SCTP_ABORT | SCTP_EOF)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6178 | return -EINVAL; |
| 6179 | break; |
| 6180 | |
| 6181 | default: |
| 6182 | return -EINVAL; |
Stephen Hemminger | 3ff50b7 | 2007-04-20 17:09:22 -0700 | [diff] [blame] | 6183 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6184 | } |
| 6185 | return 0; |
| 6186 | } |
| 6187 | |
| 6188 | /* |
| 6189 | * Wait for a packet.. |
| 6190 | * Note: This function is the same function as in core/datagram.c |
| 6191 | * with a few modifications to make lksctp work. |
| 6192 | */ |
| 6193 | static int sctp_wait_for_packet(struct sock * sk, int *err, long *timeo_p) |
| 6194 | { |
| 6195 | int error; |
| 6196 | DEFINE_WAIT(wait); |
| 6197 | |
Eric Dumazet | aa39514 | 2010-04-20 13:03:51 +0000 | [diff] [blame] | 6198 | prepare_to_wait_exclusive(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6199 | |
| 6200 | /* Socket errors? */ |
| 6201 | error = sock_error(sk); |
| 6202 | if (error) |
| 6203 | goto out; |
| 6204 | |
| 6205 | if (!skb_queue_empty(&sk->sk_receive_queue)) |
| 6206 | goto ready; |
| 6207 | |
| 6208 | /* Socket shut down? */ |
| 6209 | if (sk->sk_shutdown & RCV_SHUTDOWN) |
| 6210 | goto out; |
| 6211 | |
| 6212 | /* Sequenced packets can come disconnected. If so we report the |
| 6213 | * problem. |
| 6214 | */ |
| 6215 | error = -ENOTCONN; |
| 6216 | |
| 6217 | /* Is there a good reason to think that we may receive some data? */ |
| 6218 | if (list_empty(&sctp_sk(sk)->ep->asocs) && !sctp_sstate(sk, LISTENING)) |
| 6219 | goto out; |
| 6220 | |
| 6221 | /* Handle signals. */ |
| 6222 | if (signal_pending(current)) |
| 6223 | goto interrupted; |
| 6224 | |
| 6225 | /* Let another process have a go. Since we are going to sleep |
| 6226 | * anyway. Note: This may cause odd behaviors if the message |
| 6227 | * does not fit in the user's buffer, but this seems to be the |
| 6228 | * only way to honor MSG_DONTWAIT realistically. |
| 6229 | */ |
| 6230 | sctp_release_sock(sk); |
| 6231 | *timeo_p = schedule_timeout(*timeo_p); |
| 6232 | sctp_lock_sock(sk); |
| 6233 | |
| 6234 | ready: |
Eric Dumazet | aa39514 | 2010-04-20 13:03:51 +0000 | [diff] [blame] | 6235 | finish_wait(sk_sleep(sk), &wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6236 | return 0; |
| 6237 | |
| 6238 | interrupted: |
| 6239 | error = sock_intr_errno(*timeo_p); |
| 6240 | |
| 6241 | out: |
Eric Dumazet | aa39514 | 2010-04-20 13:03:51 +0000 | [diff] [blame] | 6242 | finish_wait(sk_sleep(sk), &wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6243 | *err = error; |
| 6244 | return error; |
| 6245 | } |
| 6246 | |
| 6247 | /* Receive a datagram. |
| 6248 | * Note: This is pretty much the same routine as in core/datagram.c |
| 6249 | * with a few changes to make lksctp work. |
| 6250 | */ |
| 6251 | static struct sk_buff *sctp_skb_recv_datagram(struct sock *sk, int flags, |
| 6252 | int noblock, int *err) |
| 6253 | { |
| 6254 | int error; |
| 6255 | struct sk_buff *skb; |
| 6256 | long timeo; |
| 6257 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6258 | timeo = sock_rcvtimeo(sk, noblock); |
| 6259 | |
| 6260 | SCTP_DEBUG_PRINTK("Timeout: timeo: %ld, MAX: %ld.\n", |
| 6261 | timeo, MAX_SCHEDULE_TIMEOUT); |
| 6262 | |
| 6263 | do { |
| 6264 | /* Again only user level code calls this function, |
| 6265 | * so nothing interrupt level |
| 6266 | * will suddenly eat the receive_queue. |
| 6267 | * |
| 6268 | * Look at current nfs client by the way... |
David Shwatrz | 8917a3c | 2010-12-02 09:01:55 +0000 | [diff] [blame] | 6269 | * However, this function was correct in any case. 8) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6270 | */ |
| 6271 | if (flags & MSG_PEEK) { |
Herbert Xu | 1e061ab | 2005-06-18 22:56:42 -0700 | [diff] [blame] | 6272 | spin_lock_bh(&sk->sk_receive_queue.lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6273 | skb = skb_peek(&sk->sk_receive_queue); |
| 6274 | if (skb) |
| 6275 | atomic_inc(&skb->users); |
Herbert Xu | 1e061ab | 2005-06-18 22:56:42 -0700 | [diff] [blame] | 6276 | spin_unlock_bh(&sk->sk_receive_queue.lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6277 | } else { |
| 6278 | skb = skb_dequeue(&sk->sk_receive_queue); |
| 6279 | } |
| 6280 | |
| 6281 | if (skb) |
| 6282 | return skb; |
| 6283 | |
Neil Horman | 6736dc3 | 2005-12-02 20:30:06 -0800 | [diff] [blame] | 6284 | /* Caller is allowed not to check sk->sk_err before calling. */ |
| 6285 | error = sock_error(sk); |
| 6286 | if (error) |
| 6287 | goto no_packet; |
| 6288 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6289 | if (sk->sk_shutdown & RCV_SHUTDOWN) |
| 6290 | break; |
| 6291 | |
| 6292 | /* User doesn't want to wait. */ |
| 6293 | error = -EAGAIN; |
| 6294 | if (!timeo) |
| 6295 | goto no_packet; |
| 6296 | } while (sctp_wait_for_packet(sk, err, &timeo) == 0); |
| 6297 | |
| 6298 | return NULL; |
| 6299 | |
| 6300 | no_packet: |
| 6301 | *err = error; |
| 6302 | return NULL; |
| 6303 | } |
| 6304 | |
| 6305 | /* If sndbuf has changed, wake up per association sndbuf waiters. */ |
| 6306 | static void __sctp_write_space(struct sctp_association *asoc) |
| 6307 | { |
| 6308 | struct sock *sk = asoc->base.sk; |
| 6309 | struct socket *sock = sk->sk_socket; |
| 6310 | |
| 6311 | if ((sctp_wspace(asoc) > 0) && sock) { |
| 6312 | if (waitqueue_active(&asoc->wait)) |
| 6313 | wake_up_interruptible(&asoc->wait); |
| 6314 | |
| 6315 | if (sctp_writeable(sk)) { |
Eric Dumazet | eaefd11 | 2011-02-18 03:26:36 +0000 | [diff] [blame] | 6316 | wait_queue_head_t *wq = sk_sleep(sk); |
| 6317 | |
| 6318 | if (wq && waitqueue_active(wq)) |
| 6319 | wake_up_interruptible(wq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6320 | |
| 6321 | /* Note that we try to include the Async I/O support |
| 6322 | * here by modeling from the current TCP/UDP code. |
| 6323 | * We have not tested with it yet. |
| 6324 | */ |
Eric Dumazet | eaefd11 | 2011-02-18 03:26:36 +0000 | [diff] [blame] | 6325 | if (!(sk->sk_shutdown & SEND_SHUTDOWN)) |
Pavel Emelyanov | 8d8ad9d | 2007-11-26 20:10:50 +0800 | [diff] [blame] | 6326 | sock_wake_async(sock, |
| 6327 | SOCK_WAKE_SPACE, POLL_OUT); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6328 | } |
| 6329 | } |
| 6330 | } |
| 6331 | |
| 6332 | /* Do accounting for the sndbuf space. |
| 6333 | * Decrement the used sndbuf space of the corresponding association by the |
| 6334 | * data size which was just transmitted(freed). |
| 6335 | */ |
| 6336 | static void sctp_wfree(struct sk_buff *skb) |
| 6337 | { |
| 6338 | struct sctp_association *asoc; |
| 6339 | struct sctp_chunk *chunk; |
| 6340 | struct sock *sk; |
| 6341 | |
| 6342 | /* Get the saved chunk pointer. */ |
| 6343 | chunk = *((struct sctp_chunk **)(skb->cb)); |
| 6344 | asoc = chunk->asoc; |
| 6345 | sk = asoc->base.sk; |
Neil Horman | 4eb701d | 2005-04-28 12:02:04 -0700 | [diff] [blame] | 6346 | asoc->sndbuf_used -= SCTP_DATA_SNDSIZE(chunk) + |
| 6347 | sizeof(struct sk_buff) + |
| 6348 | sizeof(struct sctp_chunk); |
| 6349 | |
Neil Horman | 4eb701d | 2005-04-28 12:02:04 -0700 | [diff] [blame] | 6350 | atomic_sub(sizeof(struct sctp_chunk), &sk->sk_wmem_alloc); |
| 6351 | |
Neil Horman | 4d93df0 | 2007-08-15 16:07:44 -0700 | [diff] [blame] | 6352 | /* |
Hideo Aoki | 3ab224b | 2007-12-31 00:11:19 -0800 | [diff] [blame] | 6353 | * This undoes what is done via sctp_set_owner_w and sk_mem_charge |
Neil Horman | 4d93df0 | 2007-08-15 16:07:44 -0700 | [diff] [blame] | 6354 | */ |
| 6355 | sk->sk_wmem_queued -= skb->truesize; |
Hideo Aoki | 3ab224b | 2007-12-31 00:11:19 -0800 | [diff] [blame] | 6356 | sk_mem_uncharge(sk, skb->truesize); |
Neil Horman | 4d93df0 | 2007-08-15 16:07:44 -0700 | [diff] [blame] | 6357 | |
Neil Horman | 4eb701d | 2005-04-28 12:02:04 -0700 | [diff] [blame] | 6358 | sock_wfree(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6359 | __sctp_write_space(asoc); |
| 6360 | |
| 6361 | sctp_association_put(asoc); |
| 6362 | } |
| 6363 | |
Vlad Yasevich | 331c4ee | 2006-10-09 21:34:04 -0700 | [diff] [blame] | 6364 | /* Do accounting for the receive space on the socket. |
| 6365 | * Accounting for the association is done in ulpevent.c |
| 6366 | * We set this as a destructor for the cloned data skbs so that |
| 6367 | * accounting is done at the correct time. |
| 6368 | */ |
| 6369 | void sctp_sock_rfree(struct sk_buff *skb) |
| 6370 | { |
| 6371 | struct sock *sk = skb->sk; |
| 6372 | struct sctp_ulpevent *event = sctp_skb2event(skb); |
| 6373 | |
| 6374 | atomic_sub(event->rmem_len, &sk->sk_rmem_alloc); |
Neil Horman | 4d93df0 | 2007-08-15 16:07:44 -0700 | [diff] [blame] | 6375 | |
| 6376 | /* |
Hideo Aoki | 3ab224b | 2007-12-31 00:11:19 -0800 | [diff] [blame] | 6377 | * Mimic the behavior of sock_rfree |
Neil Horman | 4d93df0 | 2007-08-15 16:07:44 -0700 | [diff] [blame] | 6378 | */ |
Hideo Aoki | 3ab224b | 2007-12-31 00:11:19 -0800 | [diff] [blame] | 6379 | sk_mem_uncharge(sk, event->rmem_len); |
Vlad Yasevich | 331c4ee | 2006-10-09 21:34:04 -0700 | [diff] [blame] | 6380 | } |
| 6381 | |
| 6382 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6383 | /* Helper function to wait for space in the sndbuf. */ |
| 6384 | static int sctp_wait_for_sndbuf(struct sctp_association *asoc, long *timeo_p, |
| 6385 | size_t msg_len) |
| 6386 | { |
| 6387 | struct sock *sk = asoc->base.sk; |
| 6388 | int err = 0; |
| 6389 | long current_timeo = *timeo_p; |
| 6390 | DEFINE_WAIT(wait); |
| 6391 | |
| 6392 | SCTP_DEBUG_PRINTK("wait_for_sndbuf: asoc=%p, timeo=%ld, msg_len=%zu\n", |
YOSHIFUJI Hideaki | d808ad9 | 2007-02-09 23:25:18 +0900 | [diff] [blame] | 6393 | asoc, (long)(*timeo_p), msg_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6394 | |
| 6395 | /* Increment the association's refcnt. */ |
| 6396 | sctp_association_hold(asoc); |
| 6397 | |
| 6398 | /* Wait on the association specific sndbuf space. */ |
| 6399 | for (;;) { |
| 6400 | prepare_to_wait_exclusive(&asoc->wait, &wait, |
| 6401 | TASK_INTERRUPTIBLE); |
| 6402 | if (!*timeo_p) |
| 6403 | goto do_nonblock; |
| 6404 | if (sk->sk_err || asoc->state >= SCTP_STATE_SHUTDOWN_PENDING || |
| 6405 | asoc->base.dead) |
| 6406 | goto do_error; |
| 6407 | if (signal_pending(current)) |
| 6408 | goto do_interrupted; |
| 6409 | if (msg_len <= sctp_wspace(asoc)) |
| 6410 | break; |
| 6411 | |
| 6412 | /* Let another process have a go. Since we are going |
| 6413 | * to sleep anyway. |
| 6414 | */ |
| 6415 | sctp_release_sock(sk); |
| 6416 | current_timeo = schedule_timeout(current_timeo); |
Vladislav Yasevich | 61c9fed | 2006-05-19 11:01:18 -0700 | [diff] [blame] | 6417 | BUG_ON(sk != asoc->base.sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6418 | sctp_lock_sock(sk); |
| 6419 | |
| 6420 | *timeo_p = current_timeo; |
| 6421 | } |
| 6422 | |
| 6423 | out: |
| 6424 | finish_wait(&asoc->wait, &wait); |
| 6425 | |
| 6426 | /* Release the association's refcnt. */ |
| 6427 | sctp_association_put(asoc); |
| 6428 | |
| 6429 | return err; |
| 6430 | |
| 6431 | do_error: |
| 6432 | err = -EPIPE; |
| 6433 | goto out; |
| 6434 | |
| 6435 | do_interrupted: |
| 6436 | err = sock_intr_errno(*timeo_p); |
| 6437 | goto out; |
| 6438 | |
| 6439 | do_nonblock: |
| 6440 | err = -EAGAIN; |
| 6441 | goto out; |
| 6442 | } |
| 6443 | |
Wei Yongjun | 561b173 | 2010-04-28 08:47:18 +0000 | [diff] [blame] | 6444 | void sctp_data_ready(struct sock *sk, int len) |
| 6445 | { |
David S. Miller | 7ef5273 | 2010-05-02 21:43:40 -0700 | [diff] [blame] | 6446 | struct socket_wq *wq; |
| 6447 | |
| 6448 | rcu_read_lock(); |
| 6449 | wq = rcu_dereference(sk->sk_wq); |
| 6450 | if (wq_has_sleeper(wq)) |
| 6451 | wake_up_interruptible_sync_poll(&wq->wait, POLLIN | |
Wei Yongjun | 561b173 | 2010-04-28 08:47:18 +0000 | [diff] [blame] | 6452 | POLLRDNORM | POLLRDBAND); |
| 6453 | sk_wake_async(sk, SOCK_WAKE_WAITD, POLL_IN); |
David S. Miller | 7ef5273 | 2010-05-02 21:43:40 -0700 | [diff] [blame] | 6454 | rcu_read_unlock(); |
Wei Yongjun | 561b173 | 2010-04-28 08:47:18 +0000 | [diff] [blame] | 6455 | } |
| 6456 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6457 | /* If socket sndbuf has changed, wake up all per association waiters. */ |
| 6458 | void sctp_write_space(struct sock *sk) |
| 6459 | { |
| 6460 | struct sctp_association *asoc; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6461 | |
| 6462 | /* Wake up the tasks in each wait queue. */ |
Robert P. J. Day | 9dbc15f | 2008-04-12 18:54:24 -0700 | [diff] [blame] | 6463 | list_for_each_entry(asoc, &((sctp_sk(sk))->ep->asocs), asocs) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6464 | __sctp_write_space(asoc); |
| 6465 | } |
| 6466 | } |
| 6467 | |
| 6468 | /* Is there any sndbuf space available on the socket? |
| 6469 | * |
Neil Horman | 9bffc4a | 2005-12-19 14:24:40 -0800 | [diff] [blame] | 6470 | * Note that sk_wmem_alloc is the sum of the send buffers on all of the |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6471 | * associations on the same socket. For a UDP-style socket with |
| 6472 | * multiple associations, it is possible for it to be "unwriteable" |
| 6473 | * prematurely. I assume that this is acceptable because |
| 6474 | * a premature "unwriteable" is better than an accidental "writeable" which |
| 6475 | * would cause an unwanted block under certain circumstances. For the 1-1 |
| 6476 | * UDP-style sockets or TCP-style sockets, this code should work. |
| 6477 | * - Daisy |
| 6478 | */ |
| 6479 | static int sctp_writeable(struct sock *sk) |
| 6480 | { |
| 6481 | int amt = 0; |
| 6482 | |
Eric Dumazet | 31e6d36 | 2009-06-17 19:05:41 -0700 | [diff] [blame] | 6483 | amt = sk->sk_sndbuf - sk_wmem_alloc_get(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6484 | if (amt < 0) |
| 6485 | amt = 0; |
| 6486 | return amt; |
| 6487 | } |
| 6488 | |
| 6489 | /* Wait for an association to go into ESTABLISHED state. If timeout is 0, |
| 6490 | * returns immediately with EINPROGRESS. |
| 6491 | */ |
| 6492 | static int sctp_wait_for_connect(struct sctp_association *asoc, long *timeo_p) |
| 6493 | { |
| 6494 | struct sock *sk = asoc->base.sk; |
| 6495 | int err = 0; |
| 6496 | long current_timeo = *timeo_p; |
| 6497 | DEFINE_WAIT(wait); |
| 6498 | |
Harvey Harrison | 0dc4787 | 2008-03-05 20:47:47 -0800 | [diff] [blame] | 6499 | SCTP_DEBUG_PRINTK("%s: asoc=%p, timeo=%ld\n", __func__, asoc, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6500 | (long)(*timeo_p)); |
| 6501 | |
| 6502 | /* Increment the association's refcnt. */ |
| 6503 | sctp_association_hold(asoc); |
| 6504 | |
| 6505 | for (;;) { |
| 6506 | prepare_to_wait_exclusive(&asoc->wait, &wait, |
| 6507 | TASK_INTERRUPTIBLE); |
| 6508 | if (!*timeo_p) |
| 6509 | goto do_nonblock; |
| 6510 | if (sk->sk_shutdown & RCV_SHUTDOWN) |
| 6511 | break; |
| 6512 | if (sk->sk_err || asoc->state >= SCTP_STATE_SHUTDOWN_PENDING || |
| 6513 | asoc->base.dead) |
| 6514 | goto do_error; |
| 6515 | if (signal_pending(current)) |
| 6516 | goto do_interrupted; |
| 6517 | |
| 6518 | if (sctp_state(asoc, ESTABLISHED)) |
| 6519 | break; |
| 6520 | |
| 6521 | /* Let another process have a go. Since we are going |
| 6522 | * to sleep anyway. |
| 6523 | */ |
| 6524 | sctp_release_sock(sk); |
| 6525 | current_timeo = schedule_timeout(current_timeo); |
| 6526 | sctp_lock_sock(sk); |
| 6527 | |
| 6528 | *timeo_p = current_timeo; |
| 6529 | } |
| 6530 | |
| 6531 | out: |
| 6532 | finish_wait(&asoc->wait, &wait); |
| 6533 | |
| 6534 | /* Release the association's refcnt. */ |
| 6535 | sctp_association_put(asoc); |
| 6536 | |
| 6537 | return err; |
| 6538 | |
| 6539 | do_error: |
Vlad Yasevich | 81845c2 | 2006-01-30 15:59:54 -0800 | [diff] [blame] | 6540 | if (asoc->init_err_counter + 1 > asoc->max_init_attempts) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6541 | err = -ETIMEDOUT; |
| 6542 | else |
| 6543 | err = -ECONNREFUSED; |
| 6544 | goto out; |
| 6545 | |
| 6546 | do_interrupted: |
| 6547 | err = sock_intr_errno(*timeo_p); |
| 6548 | goto out; |
| 6549 | |
| 6550 | do_nonblock: |
| 6551 | err = -EINPROGRESS; |
| 6552 | goto out; |
| 6553 | } |
| 6554 | |
| 6555 | static int sctp_wait_for_accept(struct sock *sk, long timeo) |
| 6556 | { |
| 6557 | struct sctp_endpoint *ep; |
| 6558 | int err = 0; |
| 6559 | DEFINE_WAIT(wait); |
| 6560 | |
| 6561 | ep = sctp_sk(sk)->ep; |
| 6562 | |
| 6563 | |
| 6564 | for (;;) { |
Eric Dumazet | aa39514 | 2010-04-20 13:03:51 +0000 | [diff] [blame] | 6565 | prepare_to_wait_exclusive(sk_sleep(sk), &wait, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6566 | TASK_INTERRUPTIBLE); |
| 6567 | |
| 6568 | if (list_empty(&ep->asocs)) { |
| 6569 | sctp_release_sock(sk); |
| 6570 | timeo = schedule_timeout(timeo); |
| 6571 | sctp_lock_sock(sk); |
| 6572 | } |
| 6573 | |
| 6574 | err = -EINVAL; |
| 6575 | if (!sctp_sstate(sk, LISTENING)) |
| 6576 | break; |
| 6577 | |
| 6578 | err = 0; |
| 6579 | if (!list_empty(&ep->asocs)) |
| 6580 | break; |
| 6581 | |
| 6582 | err = sock_intr_errno(timeo); |
| 6583 | if (signal_pending(current)) |
| 6584 | break; |
| 6585 | |
| 6586 | err = -EAGAIN; |
| 6587 | if (!timeo) |
| 6588 | break; |
| 6589 | } |
| 6590 | |
Eric Dumazet | aa39514 | 2010-04-20 13:03:51 +0000 | [diff] [blame] | 6591 | finish_wait(sk_sleep(sk), &wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6592 | |
| 6593 | return err; |
| 6594 | } |
| 6595 | |
sebastian@breakpoint.cc | 0467521 | 2007-07-26 23:21:31 +0200 | [diff] [blame] | 6596 | static void sctp_wait_for_close(struct sock *sk, long timeout) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6597 | { |
| 6598 | DEFINE_WAIT(wait); |
| 6599 | |
| 6600 | do { |
Eric Dumazet | aa39514 | 2010-04-20 13:03:51 +0000 | [diff] [blame] | 6601 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6602 | if (list_empty(&sctp_sk(sk)->ep->asocs)) |
| 6603 | break; |
| 6604 | sctp_release_sock(sk); |
| 6605 | timeout = schedule_timeout(timeout); |
| 6606 | sctp_lock_sock(sk); |
| 6607 | } while (!signal_pending(current) && timeout); |
| 6608 | |
Eric Dumazet | aa39514 | 2010-04-20 13:03:51 +0000 | [diff] [blame] | 6609 | finish_wait(sk_sleep(sk), &wait); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6610 | } |
| 6611 | |
Tsutomu Fujii | ea2bc48 | 2007-04-17 12:49:53 -0700 | [diff] [blame] | 6612 | static void sctp_skb_set_owner_r_frag(struct sk_buff *skb, struct sock *sk) |
| 6613 | { |
| 6614 | struct sk_buff *frag; |
| 6615 | |
| 6616 | if (!skb->data_len) |
| 6617 | goto done; |
| 6618 | |
| 6619 | /* Don't forget the fragments. */ |
David S. Miller | 1b003be | 2009-06-09 00:22:35 -0700 | [diff] [blame] | 6620 | skb_walk_frags(skb, frag) |
Tsutomu Fujii | ea2bc48 | 2007-04-17 12:49:53 -0700 | [diff] [blame] | 6621 | sctp_skb_set_owner_r_frag(frag, sk); |
| 6622 | |
| 6623 | done: |
| 6624 | sctp_skb_set_owner_r(skb, sk); |
| 6625 | } |
| 6626 | |
Vlad Yasevich | 914e1c8 | 2009-02-13 08:33:44 +0000 | [diff] [blame] | 6627 | void sctp_copy_sock(struct sock *newsk, struct sock *sk, |
| 6628 | struct sctp_association *asoc) |
| 6629 | { |
| 6630 | struct inet_sock *inet = inet_sk(sk); |
Julia Lawall | 09cb47a | 2010-01-21 02:43:20 -0800 | [diff] [blame] | 6631 | struct inet_sock *newinet; |
Vlad Yasevich | 914e1c8 | 2009-02-13 08:33:44 +0000 | [diff] [blame] | 6632 | |
| 6633 | newsk->sk_type = sk->sk_type; |
| 6634 | newsk->sk_bound_dev_if = sk->sk_bound_dev_if; |
| 6635 | newsk->sk_flags = sk->sk_flags; |
| 6636 | newsk->sk_no_check = sk->sk_no_check; |
| 6637 | newsk->sk_reuse = sk->sk_reuse; |
| 6638 | |
| 6639 | newsk->sk_shutdown = sk->sk_shutdown; |
| 6640 | newsk->sk_destruct = inet_sock_destruct; |
| 6641 | newsk->sk_family = sk->sk_family; |
| 6642 | newsk->sk_protocol = IPPROTO_SCTP; |
| 6643 | newsk->sk_backlog_rcv = sk->sk_prot->backlog_rcv; |
| 6644 | newsk->sk_sndbuf = sk->sk_sndbuf; |
| 6645 | newsk->sk_rcvbuf = sk->sk_rcvbuf; |
| 6646 | newsk->sk_lingertime = sk->sk_lingertime; |
| 6647 | newsk->sk_rcvtimeo = sk->sk_rcvtimeo; |
| 6648 | newsk->sk_sndtimeo = sk->sk_sndtimeo; |
| 6649 | |
| 6650 | newinet = inet_sk(newsk); |
| 6651 | |
| 6652 | /* Initialize sk's sport, dport, rcv_saddr and daddr for |
| 6653 | * getsockname() and getpeername() |
| 6654 | */ |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 6655 | newinet->inet_sport = inet->inet_sport; |
| 6656 | newinet->inet_saddr = inet->inet_saddr; |
| 6657 | newinet->inet_rcv_saddr = inet->inet_rcv_saddr; |
| 6658 | newinet->inet_dport = htons(asoc->peer.port); |
Vlad Yasevich | 914e1c8 | 2009-02-13 08:33:44 +0000 | [diff] [blame] | 6659 | newinet->pmtudisc = inet->pmtudisc; |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 6660 | newinet->inet_id = asoc->next_tsn ^ jiffies; |
Vlad Yasevich | 914e1c8 | 2009-02-13 08:33:44 +0000 | [diff] [blame] | 6661 | |
| 6662 | newinet->uc_ttl = inet->uc_ttl; |
| 6663 | newinet->mc_loop = 1; |
| 6664 | newinet->mc_ttl = 1; |
| 6665 | newinet->mc_index = 0; |
| 6666 | newinet->mc_list = NULL; |
| 6667 | } |
| 6668 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6669 | /* Populate the fields of the newsk from the oldsk and migrate the assoc |
| 6670 | * and its messages to the newsk. |
| 6671 | */ |
| 6672 | static void sctp_sock_migrate(struct sock *oldsk, struct sock *newsk, |
| 6673 | struct sctp_association *assoc, |
| 6674 | sctp_socket_type_t type) |
| 6675 | { |
| 6676 | struct sctp_sock *oldsp = sctp_sk(oldsk); |
| 6677 | struct sctp_sock *newsp = sctp_sk(newsk); |
| 6678 | struct sctp_bind_bucket *pp; /* hash list port iterator */ |
| 6679 | struct sctp_endpoint *newep = newsp->ep; |
| 6680 | struct sk_buff *skb, *tmp; |
| 6681 | struct sctp_ulpevent *event; |
Vlad Yasevich | f26f7c4 | 2007-12-06 22:50:27 -0800 | [diff] [blame] | 6682 | struct sctp_bind_hashbucket *head; |
Michio Honda | 9f7d653 | 2011-04-26 19:32:51 +0900 | [diff] [blame] | 6683 | struct list_head tmplist; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6684 | |
| 6685 | /* Migrate socket buffer sizes and all the socket level options to the |
| 6686 | * new socket. |
| 6687 | */ |
| 6688 | newsk->sk_sndbuf = oldsk->sk_sndbuf; |
| 6689 | newsk->sk_rcvbuf = oldsk->sk_rcvbuf; |
| 6690 | /* Brute force copy old sctp opt. */ |
Michio Honda | 9f7d653 | 2011-04-26 19:32:51 +0900 | [diff] [blame] | 6691 | if (oldsp->do_auto_asconf) { |
| 6692 | memcpy(&tmplist, &newsp->auto_asconf_list, sizeof(tmplist)); |
| 6693 | inet_sk_copy_descendant(newsk, oldsk); |
| 6694 | memcpy(&newsp->auto_asconf_list, &tmplist, sizeof(tmplist)); |
| 6695 | } else |
| 6696 | inet_sk_copy_descendant(newsk, oldsk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6697 | |
| 6698 | /* Restore the ep value that was overwritten with the above structure |
| 6699 | * copy. |
| 6700 | */ |
| 6701 | newsp->ep = newep; |
| 6702 | newsp->hmac = NULL; |
| 6703 | |
| 6704 | /* Hook this new socket in to the bind_hash list. */ |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 6705 | head = &sctp_port_hashtable[sctp_phashfn(inet_sk(oldsk)->inet_num)]; |
Vlad Yasevich | f26f7c4 | 2007-12-06 22:50:27 -0800 | [diff] [blame] | 6706 | sctp_local_bh_disable(); |
| 6707 | sctp_spin_lock(&head->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6708 | pp = sctp_sk(oldsk)->bind_hash; |
| 6709 | sk_add_bind_node(newsk, &pp->owner); |
| 6710 | sctp_sk(newsk)->bind_hash = pp; |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 6711 | inet_sk(newsk)->inet_num = inet_sk(oldsk)->inet_num; |
Vlad Yasevich | f26f7c4 | 2007-12-06 22:50:27 -0800 | [diff] [blame] | 6712 | sctp_spin_unlock(&head->lock); |
| 6713 | sctp_local_bh_enable(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6714 | |
Vladislav Yasevich | 4243cac | 2005-06-13 15:10:49 -0700 | [diff] [blame] | 6715 | /* Copy the bind_addr list from the original endpoint to the new |
| 6716 | * endpoint so that we can handle restarts properly |
| 6717 | */ |
Vlad Yasevich | 8e71a11 | 2007-12-06 22:50:54 -0800 | [diff] [blame] | 6718 | sctp_bind_addr_dup(&newsp->ep->base.bind_addr, |
| 6719 | &oldsp->ep->base.bind_addr, GFP_KERNEL); |
Vladislav Yasevich | 4243cac | 2005-06-13 15:10:49 -0700 | [diff] [blame] | 6720 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6721 | /* Move any messages in the old socket's receive queue that are for the |
| 6722 | * peeled off association to the new socket's receive queue. |
| 6723 | */ |
| 6724 | sctp_skb_for_each(skb, &oldsk->sk_receive_queue, tmp) { |
| 6725 | event = sctp_skb2event(skb); |
| 6726 | if (event->asoc == assoc) { |
David S. Miller | 8728b83 | 2005-08-09 19:25:21 -0700 | [diff] [blame] | 6727 | __skb_unlink(skb, &oldsk->sk_receive_queue); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6728 | __skb_queue_tail(&newsk->sk_receive_queue, skb); |
Tsutomu Fujii | ea2bc48 | 2007-04-17 12:49:53 -0700 | [diff] [blame] | 6729 | sctp_skb_set_owner_r_frag(skb, newsk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6730 | } |
| 6731 | } |
| 6732 | |
| 6733 | /* Clean up any messages pending delivery due to partial |
| 6734 | * delivery. Three cases: |
| 6735 | * 1) No partial deliver; no work. |
| 6736 | * 2) Peeling off partial delivery; keep pd_lobby in new pd_lobby. |
| 6737 | * 3) Peeling off non-partial delivery; move pd_lobby to receive_queue. |
| 6738 | */ |
| 6739 | skb_queue_head_init(&newsp->pd_lobby); |
Vlad Yasevich | b6e1331 | 2007-04-20 12:23:15 -0700 | [diff] [blame] | 6740 | atomic_set(&sctp_sk(newsk)->pd_mode, assoc->ulpq.pd_mode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6741 | |
Vlad Yasevich | b6e1331 | 2007-04-20 12:23:15 -0700 | [diff] [blame] | 6742 | if (atomic_read(&sctp_sk(oldsk)->pd_mode)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6743 | struct sk_buff_head *queue; |
| 6744 | |
| 6745 | /* Decide which queue to move pd_lobby skbs to. */ |
| 6746 | if (assoc->ulpq.pd_mode) { |
| 6747 | queue = &newsp->pd_lobby; |
| 6748 | } else |
| 6749 | queue = &newsk->sk_receive_queue; |
| 6750 | |
| 6751 | /* Walk through the pd_lobby, looking for skbs that |
| 6752 | * need moved to the new socket. |
| 6753 | */ |
| 6754 | sctp_skb_for_each(skb, &oldsp->pd_lobby, tmp) { |
| 6755 | event = sctp_skb2event(skb); |
| 6756 | if (event->asoc == assoc) { |
David S. Miller | 8728b83 | 2005-08-09 19:25:21 -0700 | [diff] [blame] | 6757 | __skb_unlink(skb, &oldsp->pd_lobby); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6758 | __skb_queue_tail(queue, skb); |
Tsutomu Fujii | ea2bc48 | 2007-04-17 12:49:53 -0700 | [diff] [blame] | 6759 | sctp_skb_set_owner_r_frag(skb, newsk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6760 | } |
| 6761 | } |
| 6762 | |
| 6763 | /* Clear up any skbs waiting for the partial |
| 6764 | * delivery to finish. |
| 6765 | */ |
| 6766 | if (assoc->ulpq.pd_mode) |
Vlad Yasevich | b6e1331 | 2007-04-20 12:23:15 -0700 | [diff] [blame] | 6767 | sctp_clear_pd(oldsk, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6768 | |
| 6769 | } |
| 6770 | |
Wei Yongjun | 1bc4ee4 | 2009-07-05 19:45:48 +0000 | [diff] [blame] | 6771 | sctp_skb_for_each(skb, &assoc->ulpq.reasm, tmp) |
Tsutomu Fujii | ea2bc48 | 2007-04-17 12:49:53 -0700 | [diff] [blame] | 6772 | sctp_skb_set_owner_r_frag(skb, newsk); |
Tsutomu Fujii | ea2bc48 | 2007-04-17 12:49:53 -0700 | [diff] [blame] | 6773 | |
Wei Yongjun | 1bc4ee4 | 2009-07-05 19:45:48 +0000 | [diff] [blame] | 6774 | sctp_skb_for_each(skb, &assoc->ulpq.lobby, tmp) |
Tsutomu Fujii | ea2bc48 | 2007-04-17 12:49:53 -0700 | [diff] [blame] | 6775 | sctp_skb_set_owner_r_frag(skb, newsk); |
Tsutomu Fujii | ea2bc48 | 2007-04-17 12:49:53 -0700 | [diff] [blame] | 6776 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6777 | /* Set the type of socket to indicate that it is peeled off from the |
| 6778 | * original UDP-style socket or created with the accept() call on a |
| 6779 | * TCP-style socket.. |
| 6780 | */ |
| 6781 | newsp->type = type; |
| 6782 | |
Vladislav Yasevich | 61c9fed | 2006-05-19 11:01:18 -0700 | [diff] [blame] | 6783 | /* Mark the new socket "in-use" by the user so that any packets |
| 6784 | * that may arrive on the association after we've moved it are |
| 6785 | * queued to the backlog. This prevents a potential race between |
| 6786 | * backlog processing on the old socket and new-packet processing |
| 6787 | * on the new socket. |
Zach Brown | 5131a18 | 2007-06-22 15:14:46 -0700 | [diff] [blame] | 6788 | * |
| 6789 | * The caller has just allocated newsk so we can guarantee that other |
| 6790 | * paths won't try to lock it and then oldsk. |
Vladislav Yasevich | 61c9fed | 2006-05-19 11:01:18 -0700 | [diff] [blame] | 6791 | */ |
Zach Brown | 5131a18 | 2007-06-22 15:14:46 -0700 | [diff] [blame] | 6792 | lock_sock_nested(newsk, SINGLE_DEPTH_NESTING); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6793 | sctp_assoc_migrate(assoc, newsk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6794 | |
| 6795 | /* If the association on the newsk is already closed before accept() |
| 6796 | * is called, set RCV_SHUTDOWN flag. |
| 6797 | */ |
| 6798 | if (sctp_state(assoc, CLOSED) && sctp_style(newsk, TCP)) |
| 6799 | newsk->sk_shutdown |= RCV_SHUTDOWN; |
| 6800 | |
| 6801 | newsk->sk_state = SCTP_SS_ESTABLISHED; |
Vladislav Yasevich | 61c9fed | 2006-05-19 11:01:18 -0700 | [diff] [blame] | 6802 | sctp_release_sock(newsk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6803 | } |
| 6804 | |
Neil Horman | 4d93df0 | 2007-08-15 16:07:44 -0700 | [diff] [blame] | 6805 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6806 | /* This proto struct describes the ULP interface for SCTP. */ |
| 6807 | struct proto sctp_prot = { |
| 6808 | .name = "SCTP", |
| 6809 | .owner = THIS_MODULE, |
| 6810 | .close = sctp_close, |
| 6811 | .connect = sctp_connect, |
| 6812 | .disconnect = sctp_disconnect, |
| 6813 | .accept = sctp_accept, |
| 6814 | .ioctl = sctp_ioctl, |
| 6815 | .init = sctp_init_sock, |
| 6816 | .destroy = sctp_destroy_sock, |
| 6817 | .shutdown = sctp_shutdown, |
| 6818 | .setsockopt = sctp_setsockopt, |
| 6819 | .getsockopt = sctp_getsockopt, |
| 6820 | .sendmsg = sctp_sendmsg, |
| 6821 | .recvmsg = sctp_recvmsg, |
| 6822 | .bind = sctp_bind, |
| 6823 | .backlog_rcv = sctp_backlog_rcv, |
| 6824 | .hash = sctp_hash, |
| 6825 | .unhash = sctp_unhash, |
| 6826 | .get_port = sctp_get_port, |
| 6827 | .obj_size = sizeof(struct sctp_sock), |
Neil Horman | 4d93df0 | 2007-08-15 16:07:44 -0700 | [diff] [blame] | 6828 | .sysctl_mem = sysctl_sctp_mem, |
| 6829 | .sysctl_rmem = sysctl_sctp_rmem, |
| 6830 | .sysctl_wmem = sysctl_sctp_wmem, |
| 6831 | .memory_pressure = &sctp_memory_pressure, |
| 6832 | .enter_memory_pressure = sctp_enter_memory_pressure, |
| 6833 | .memory_allocated = &sctp_memory_allocated, |
Pavel Emelyanov | 5f31886 | 2008-02-20 00:23:01 -0800 | [diff] [blame] | 6834 | .sockets_allocated = &sctp_sockets_allocated, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6835 | }; |
| 6836 | |
Eric Dumazet | dfd56b8 | 2011-12-10 09:48:31 +0000 | [diff] [blame] | 6837 | #if IS_ENABLED(CONFIG_IPV6) |
Eric Dumazet | 8295b6d | 2007-11-05 23:40:28 -0800 | [diff] [blame] | 6838 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6839 | struct proto sctpv6_prot = { |
| 6840 | .name = "SCTPv6", |
| 6841 | .owner = THIS_MODULE, |
| 6842 | .close = sctp_close, |
| 6843 | .connect = sctp_connect, |
| 6844 | .disconnect = sctp_disconnect, |
| 6845 | .accept = sctp_accept, |
| 6846 | .ioctl = sctp_ioctl, |
| 6847 | .init = sctp_init_sock, |
| 6848 | .destroy = sctp_destroy_sock, |
| 6849 | .shutdown = sctp_shutdown, |
| 6850 | .setsockopt = sctp_setsockopt, |
| 6851 | .getsockopt = sctp_getsockopt, |
| 6852 | .sendmsg = sctp_sendmsg, |
| 6853 | .recvmsg = sctp_recvmsg, |
| 6854 | .bind = sctp_bind, |
| 6855 | .backlog_rcv = sctp_backlog_rcv, |
| 6856 | .hash = sctp_hash, |
| 6857 | .unhash = sctp_unhash, |
| 6858 | .get_port = sctp_get_port, |
| 6859 | .obj_size = sizeof(struct sctp6_sock), |
Neil Horman | 4d93df0 | 2007-08-15 16:07:44 -0700 | [diff] [blame] | 6860 | .sysctl_mem = sysctl_sctp_mem, |
| 6861 | .sysctl_rmem = sysctl_sctp_rmem, |
| 6862 | .sysctl_wmem = sysctl_sctp_wmem, |
| 6863 | .memory_pressure = &sctp_memory_pressure, |
| 6864 | .enter_memory_pressure = sctp_enter_memory_pressure, |
| 6865 | .memory_allocated = &sctp_memory_allocated, |
Pavel Emelyanov | 5f31886 | 2008-02-20 00:23:01 -0800 | [diff] [blame] | 6866 | .sockets_allocated = &sctp_sockets_allocated, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6867 | }; |
Eric Dumazet | dfd56b8 | 2011-12-10 09:48:31 +0000 | [diff] [blame] | 6868 | #endif /* IS_ENABLED(CONFIG_IPV6) */ |