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 | * |
Vlad Yasevich | 60c778b | 2008-01-11 09:57:09 -0500 | [diff] [blame] | 7 | * This file is part of the SCTP kernel implementation |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | * |
| 9 | * The base lksctp header. |
| 10 | * |
Vlad Yasevich | 60c778b | 2008-01-11 09:57:09 -0500 | [diff] [blame] | 11 | * This SCTP implementation is free software; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | * you can redistribute it and/or modify it under the terms of |
| 13 | * the GNU General Public License as published by |
| 14 | * the Free Software Foundation; either version 2, or (at your option) |
| 15 | * any later version. |
| 16 | * |
Vlad Yasevich | 60c778b | 2008-01-11 09:57:09 -0500 | [diff] [blame] | 17 | * This SCTP implementation is distributed in the hope that it |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | * will be useful, but WITHOUT ANY WARRANTY; without even the implied |
| 19 | * ************************ |
| 20 | * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
| 21 | * See the GNU General Public License for more details. |
| 22 | * |
| 23 | * You should have received a copy of the GNU General Public License |
| 24 | * along with GNU CC; see the file COPYING. If not, write to |
| 25 | * the Free Software Foundation, 59 Temple Place - Suite 330, |
| 26 | * Boston, MA 02111-1307, USA. |
| 27 | * |
| 28 | * Please send any bug reports or fixes you make to the |
| 29 | * email address(es): |
| 30 | * lksctp developers <lksctp-developers@lists.sourceforge.net> |
| 31 | * |
| 32 | * Or submit a bug report through the following website: |
| 33 | * http://www.sf.net/projects/lksctp |
| 34 | * |
| 35 | * Written or modified by: |
| 36 | * La Monte H.P. Yarroll <piggy@acm.org> |
| 37 | * Xingang Guo <xingang.guo@intel.com> |
| 38 | * Jon Grimm <jgrimm@us.ibm.com> |
| 39 | * Daisy Chang <daisyc@us.ibm.com> |
| 40 | * Sridhar Samudrala <sri@us.ibm.com> |
| 41 | * Ardelle Fan <ardelle.fan@intel.com> |
| 42 | * Ryan Layer <rmlayer@us.ibm.com> |
| 43 | * Kevin Gao <kevin.gao@intel.com> |
| 44 | * |
| 45 | * Any bugs reported given to us we will try to fix... any fixes shared will |
| 46 | * be incorporated into the next SCTP release. |
| 47 | */ |
| 48 | |
| 49 | #ifndef __net_sctp_h__ |
| 50 | #define __net_sctp_h__ |
| 51 | |
| 52 | /* Header Strategy. |
| 53 | * Start getting some control over the header file depencies: |
| 54 | * includes |
| 55 | * constants |
| 56 | * structs |
| 57 | * prototypes |
| 58 | * macros, externs, and inlines |
| 59 | * |
| 60 | * Move test_frame specific items out of the kernel headers |
| 61 | * and into the test frame headers. This is not perfect in any sense |
| 62 | * and will continue to evolve. |
| 63 | */ |
| 64 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | #include <linux/types.h> |
| 66 | #include <linux/slab.h> |
| 67 | #include <linux/in.h> |
| 68 | #include <linux/tty.h> |
| 69 | #include <linux/proc_fs.h> |
| 70 | #include <linux/spinlock.h> |
| 71 | #include <linux/jiffies.h> |
| 72 | #include <linux/idr.h> |
| 73 | |
| 74 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
| 75 | #include <net/ipv6.h> |
| 76 | #include <net/ip6_route.h> |
| 77 | #endif |
| 78 | |
| 79 | #include <asm/uaccess.h> |
| 80 | #include <asm/page.h> |
| 81 | #include <net/sock.h> |
| 82 | #include <net/snmp.h> |
| 83 | #include <net/sctp/structs.h> |
| 84 | #include <net/sctp/constants.h> |
| 85 | |
| 86 | |
| 87 | /* Set SCTP_DEBUG flag via config if not already set. */ |
| 88 | #ifndef SCTP_DEBUG |
| 89 | #ifdef CONFIG_SCTP_DBG_MSG |
| 90 | #define SCTP_DEBUG 1 |
| 91 | #else |
| 92 | #define SCTP_DEBUG 0 |
| 93 | #endif /* CONFIG_SCTP_DBG */ |
| 94 | #endif /* SCTP_DEBUG */ |
| 95 | |
| 96 | #ifdef CONFIG_IP_SCTP_MODULE |
| 97 | #define SCTP_PROTOSW_FLAG 0 |
| 98 | #else /* static! */ |
| 99 | #define SCTP_PROTOSW_FLAG INET_PROTOSW_PERMANENT |
| 100 | #endif |
| 101 | |
| 102 | |
| 103 | /* Certain internal static functions need to be exported when |
| 104 | * compiled into the test frame. |
| 105 | */ |
| 106 | #ifndef SCTP_STATIC |
| 107 | #define SCTP_STATIC static |
| 108 | #endif |
| 109 | |
| 110 | /* |
| 111 | * Function declarations. |
| 112 | */ |
| 113 | |
| 114 | /* |
| 115 | * sctp/protocol.c |
| 116 | */ |
| 117 | extern struct sock *sctp_get_ctl_sock(void); |
Vlad Yasevich | 2930354 | 2007-09-16 16:02:12 -0700 | [diff] [blame] | 118 | extern void sctp_local_addr_free(struct rcu_head *head); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | extern int sctp_copy_local_addr_list(struct sctp_bind_addr *, |
Al Viro | dd0fc66 | 2005-10-07 07:46:04 +0100 | [diff] [blame] | 120 | sctp_scope_t, gfp_t gfp, |
Alexey Dobriyan | 3182cd84 | 2005-07-11 20:57:47 -0700 | [diff] [blame] | 121 | int flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | extern struct sctp_pf *sctp_get_pf_specific(sa_family_t family); |
| 123 | extern int sctp_register_pf(struct sctp_pf *, sa_family_t); |
| 124 | |
| 125 | /* |
| 126 | * sctp/socket.c |
| 127 | */ |
| 128 | int sctp_backlog_rcv(struct sock *sk, struct sk_buff *skb); |
| 129 | int sctp_inet_listen(struct socket *sock, int backlog); |
| 130 | void sctp_write_space(struct sock *sk); |
| 131 | unsigned int sctp_poll(struct file *file, struct socket *sock, |
| 132 | poll_table *wait); |
Vlad Yasevich | 331c4ee | 2006-10-09 21:34:04 -0700 | [diff] [blame] | 133 | void sctp_sock_rfree(struct sk_buff *skb); |
Vlad Yasevich | 914e1c8 | 2009-02-13 08:33:44 +0000 | [diff] [blame] | 134 | void sctp_copy_sock(struct sock *newsk, struct sock *sk, |
| 135 | struct sctp_association *asoc); |
Eric Dumazet | 1748376 | 2008-11-25 21:16:35 -0800 | [diff] [blame] | 136 | extern struct percpu_counter sctp_sockets_allocated; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | |
| 138 | /* |
| 139 | * sctp/primitive.c |
| 140 | */ |
| 141 | int sctp_primitive_ASSOCIATE(struct sctp_association *, void *arg); |
| 142 | int sctp_primitive_SHUTDOWN(struct sctp_association *, void *arg); |
| 143 | int sctp_primitive_ABORT(struct sctp_association *, void *arg); |
| 144 | int sctp_primitive_SEND(struct sctp_association *, void *arg); |
| 145 | int sctp_primitive_REQUESTHEARTBEAT(struct sctp_association *, void *arg); |
| 146 | int sctp_primitive_ASCONF(struct sctp_association *, void *arg); |
| 147 | |
| 148 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | * sctp/input.c |
| 150 | */ |
| 151 | int sctp_rcv(struct sk_buff *skb); |
| 152 | void sctp_v4_err(struct sk_buff *skb, u32 info); |
| 153 | void sctp_hash_established(struct sctp_association *); |
| 154 | void sctp_unhash_established(struct sctp_association *); |
| 155 | void sctp_hash_endpoint(struct sctp_endpoint *); |
| 156 | void sctp_unhash_endpoint(struct sctp_endpoint *); |
| 157 | struct sock *sctp_err_lookup(int family, struct sk_buff *, |
Sridhar Samudrala | d1ad1ff | 2005-07-18 13:44:10 -0700 | [diff] [blame] | 158 | struct sctphdr *, struct sctp_association **, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | struct sctp_transport **); |
Sridhar Samudrala | d1ad1ff | 2005-07-18 13:44:10 -0700 | [diff] [blame] | 160 | void sctp_err_finish(struct sock *, struct sctp_association *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | void sctp_icmp_frag_needed(struct sock *, struct sctp_association *, |
| 162 | struct sctp_transport *t, __u32 pmtu); |
| 163 | void sctp_icmp_proto_unreachable(struct sock *sk, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | struct sctp_association *asoc, |
| 165 | struct sctp_transport *t); |
Sridhar Samudrala | c4d2444 | 2006-01-17 11:56:26 -0800 | [diff] [blame] | 166 | void sctp_backlog_migrate(struct sctp_association *assoc, |
| 167 | struct sock *oldsk, struct sock *newsk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | |
| 169 | /* |
Adrian Bunk | 1616436 | 2006-09-18 00:40:38 -0700 | [diff] [blame] | 170 | * sctp/proc.c |
| 171 | */ |
| 172 | int sctp_snmp_proc_init(void); |
| 173 | void sctp_snmp_proc_exit(void); |
| 174 | int sctp_eps_proc_init(void); |
| 175 | void sctp_eps_proc_exit(void); |
| 176 | int sctp_assocs_proc_init(void); |
| 177 | void sctp_assocs_proc_exit(void); |
Neil Horman | 20c2c1f | 2008-05-09 15:14:50 -0700 | [diff] [blame] | 178 | int sctp_remaddr_proc_init(void); |
| 179 | void sctp_remaddr_proc_exit(void); |
Adrian Bunk | 1616436 | 2006-09-18 00:40:38 -0700 | [diff] [blame] | 180 | |
| 181 | |
| 182 | /* |
sebastian@breakpoint.cc | 0a5fcb9 | 2007-07-26 23:21:32 +0200 | [diff] [blame] | 183 | * Module global variables |
| 184 | */ |
| 185 | |
| 186 | /* |
| 187 | * sctp/protocol.c |
| 188 | */ |
| 189 | extern struct kmem_cache *sctp_chunk_cachep __read_mostly; |
| 190 | extern struct kmem_cache *sctp_bucket_cachep __read_mostly; |
| 191 | |
| 192 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | * Section: Macros, externs, and inlines |
| 194 | */ |
| 195 | |
| 196 | |
| 197 | #ifdef TEST_FRAME |
| 198 | #include <test_frame.h> |
| 199 | #else |
| 200 | |
| 201 | /* spin lock wrappers. */ |
| 202 | #define sctp_spin_lock_irqsave(lock, flags) spin_lock_irqsave(lock, flags) |
| 203 | #define sctp_spin_unlock_irqrestore(lock, flags) \ |
| 204 | spin_unlock_irqrestore(lock, flags) |
| 205 | #define sctp_local_bh_disable() local_bh_disable() |
| 206 | #define sctp_local_bh_enable() local_bh_enable() |
| 207 | #define sctp_spin_lock(lock) spin_lock(lock) |
| 208 | #define sctp_spin_unlock(lock) spin_unlock(lock) |
| 209 | #define sctp_write_lock(lock) write_lock(lock) |
| 210 | #define sctp_write_unlock(lock) write_unlock(lock) |
| 211 | #define sctp_read_lock(lock) read_lock(lock) |
| 212 | #define sctp_read_unlock(lock) read_unlock(lock) |
| 213 | |
| 214 | /* sock lock wrappers. */ |
| 215 | #define sctp_lock_sock(sk) lock_sock(sk) |
| 216 | #define sctp_release_sock(sk) release_sock(sk) |
| 217 | #define sctp_bh_lock_sock(sk) bh_lock_sock(sk) |
| 218 | #define sctp_bh_unlock_sock(sk) bh_unlock_sock(sk) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | |
| 220 | /* SCTP SNMP MIB stats handlers */ |
| 221 | DECLARE_SNMP_STAT(struct sctp_mib, sctp_statistics); |
| 222 | #define SCTP_INC_STATS(field) SNMP_INC_STATS(sctp_statistics, field) |
| 223 | #define SCTP_INC_STATS_BH(field) SNMP_INC_STATS_BH(sctp_statistics, field) |
| 224 | #define SCTP_INC_STATS_USER(field) SNMP_INC_STATS_USER(sctp_statistics, field) |
| 225 | #define SCTP_DEC_STATS(field) SNMP_DEC_STATS(sctp_statistics, field) |
| 226 | |
| 227 | #endif /* !TEST_FRAME */ |
| 228 | |
Sridhar Samudrala | ac0b046 | 2006-08-22 00:15:33 -0700 | [diff] [blame] | 229 | /* sctp mib definitions */ |
| 230 | enum |
| 231 | { |
| 232 | SCTP_MIB_NUM = 0, |
| 233 | SCTP_MIB_CURRESTAB, /* CurrEstab */ |
| 234 | SCTP_MIB_ACTIVEESTABS, /* ActiveEstabs */ |
| 235 | SCTP_MIB_PASSIVEESTABS, /* PassiveEstabs */ |
| 236 | SCTP_MIB_ABORTEDS, /* Aborteds */ |
| 237 | SCTP_MIB_SHUTDOWNS, /* Shutdowns */ |
| 238 | SCTP_MIB_OUTOFBLUES, /* OutOfBlues */ |
| 239 | SCTP_MIB_CHECKSUMERRORS, /* ChecksumErrors */ |
| 240 | SCTP_MIB_OUTCTRLCHUNKS, /* OutCtrlChunks */ |
| 241 | SCTP_MIB_OUTORDERCHUNKS, /* OutOrderChunks */ |
| 242 | SCTP_MIB_OUTUNORDERCHUNKS, /* OutUnorderChunks */ |
| 243 | SCTP_MIB_INCTRLCHUNKS, /* InCtrlChunks */ |
| 244 | SCTP_MIB_INORDERCHUNKS, /* InOrderChunks */ |
| 245 | SCTP_MIB_INUNORDERCHUNKS, /* InUnorderChunks */ |
| 246 | SCTP_MIB_FRAGUSRMSGS, /* FragUsrMsgs */ |
| 247 | SCTP_MIB_REASMUSRMSGS, /* ReasmUsrMsgs */ |
| 248 | SCTP_MIB_OUTSCTPPACKS, /* OutSCTPPacks */ |
| 249 | SCTP_MIB_INSCTPPACKS, /* InSCTPPacks */ |
| 250 | SCTP_MIB_T1_INIT_EXPIREDS, |
| 251 | SCTP_MIB_T1_COOKIE_EXPIREDS, |
| 252 | SCTP_MIB_T2_SHUTDOWN_EXPIREDS, |
| 253 | SCTP_MIB_T3_RTX_EXPIREDS, |
| 254 | SCTP_MIB_T4_RTO_EXPIREDS, |
| 255 | SCTP_MIB_T5_SHUTDOWN_GUARD_EXPIREDS, |
| 256 | SCTP_MIB_DELAY_SACK_EXPIREDS, |
| 257 | SCTP_MIB_AUTOCLOSE_EXPIREDS, |
Vlad Yasevich | b6157d8 | 2007-10-24 15:59:16 -0400 | [diff] [blame] | 258 | SCTP_MIB_T1_RETRANSMITS, |
Sridhar Samudrala | ac0b046 | 2006-08-22 00:15:33 -0700 | [diff] [blame] | 259 | SCTP_MIB_T3_RETRANSMITS, |
| 260 | SCTP_MIB_PMTUD_RETRANSMITS, |
| 261 | SCTP_MIB_FAST_RETRANSMITS, |
| 262 | SCTP_MIB_IN_PKT_SOFTIRQ, |
| 263 | SCTP_MIB_IN_PKT_BACKLOG, |
| 264 | SCTP_MIB_IN_PKT_DISCARDS, |
| 265 | SCTP_MIB_IN_DATA_CHUNK_DISCARDS, |
| 266 | __SCTP_MIB_MAX |
| 267 | }; |
| 268 | |
| 269 | #define SCTP_MIB_MAX __SCTP_MIB_MAX |
| 270 | struct sctp_mib { |
| 271 | unsigned long mibs[SCTP_MIB_MAX]; |
| 272 | } __SNMP_MIB_ALIGN__; |
| 273 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | |
| 275 | /* Print debugging messages. */ |
| 276 | #if SCTP_DEBUG |
| 277 | extern int sctp_debug_flag; |
| 278 | #define SCTP_DEBUG_PRINTK(whatever...) \ |
| 279 | ((void) (sctp_debug_flag && printk(KERN_DEBUG whatever))) |
Frank Filz | 3f7a87d | 2005-06-20 13:14:57 -0700 | [diff] [blame] | 280 | #define SCTP_DEBUG_PRINTK_IPADDR(lead, trail, leadparm, saddr, otherparms...) \ |
| 281 | if (sctp_debug_flag) { \ |
| 282 | if (saddr->sa.sa_family == AF_INET6) { \ |
| 283 | printk(KERN_DEBUG \ |
Harvey Harrison | 5b095d989 | 2008-10-29 12:52:50 -0700 | [diff] [blame] | 284 | lead "%pI6" trail, \ |
Frank Filz | 3f7a87d | 2005-06-20 13:14:57 -0700 | [diff] [blame] | 285 | leadparm, \ |
Harvey Harrison | 0c6ce78 | 2008-10-28 16:09:23 -0700 | [diff] [blame] | 286 | &saddr->v6.sin6_addr, \ |
Frank Filz | 3f7a87d | 2005-06-20 13:14:57 -0700 | [diff] [blame] | 287 | otherparms); \ |
| 288 | } else { \ |
| 289 | printk(KERN_DEBUG \ |
Harvey Harrison | 3685f25 | 2008-10-31 00:56:49 -0700 | [diff] [blame] | 290 | lead "%pI4" trail, \ |
Frank Filz | 3f7a87d | 2005-06-20 13:14:57 -0700 | [diff] [blame] | 291 | leadparm, \ |
Harvey Harrison | 3685f25 | 2008-10-31 00:56:49 -0700 | [diff] [blame] | 292 | &saddr->v4.sin_addr.s_addr, \ |
Frank Filz | 3f7a87d | 2005-06-20 13:14:57 -0700 | [diff] [blame] | 293 | otherparms); \ |
| 294 | } \ |
| 295 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | #define SCTP_ENABLE_DEBUG { sctp_debug_flag = 1; } |
| 297 | #define SCTP_DISABLE_DEBUG { sctp_debug_flag = 0; } |
| 298 | |
| 299 | #define SCTP_ASSERT(expr, str, func) \ |
| 300 | if (!(expr)) { \ |
| 301 | SCTP_DEBUG_PRINTK("Assertion Failed: %s(%s) at %s:%s:%d\n", \ |
Harvey Harrison | d5c003b | 2008-10-15 22:01:24 -0700 | [diff] [blame] | 302 | str, (#expr), __FILE__, __func__, __LINE__); \ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | func; \ |
| 304 | } |
| 305 | |
| 306 | #else /* SCTP_DEBUG */ |
| 307 | |
| 308 | #define SCTP_DEBUG_PRINTK(whatever...) |
Frank Filz | 3f7a87d | 2005-06-20 13:14:57 -0700 | [diff] [blame] | 309 | #define SCTP_DEBUG_PRINTK_IPADDR(whatever...) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | #define SCTP_ENABLE_DEBUG |
| 311 | #define SCTP_DISABLE_DEBUG |
David S. Miller | 65fd28f | 2006-06-20 00:07:52 -0700 | [diff] [blame] | 312 | #define SCTP_ASSERT(expr, str, func) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | |
| 314 | #endif /* SCTP_DEBUG */ |
| 315 | |
| 316 | |
| 317 | /* |
| 318 | * Macros for keeping a global reference of object allocations. |
| 319 | */ |
| 320 | #ifdef CONFIG_SCTP_DBG_OBJCNT |
| 321 | |
| 322 | extern atomic_t sctp_dbg_objcnt_sock; |
| 323 | extern atomic_t sctp_dbg_objcnt_ep; |
| 324 | extern atomic_t sctp_dbg_objcnt_assoc; |
| 325 | extern atomic_t sctp_dbg_objcnt_transport; |
| 326 | extern atomic_t sctp_dbg_objcnt_chunk; |
| 327 | extern atomic_t sctp_dbg_objcnt_bind_addr; |
| 328 | extern atomic_t sctp_dbg_objcnt_bind_bucket; |
| 329 | extern atomic_t sctp_dbg_objcnt_addr; |
| 330 | extern atomic_t sctp_dbg_objcnt_ssnmap; |
| 331 | extern atomic_t sctp_dbg_objcnt_datamsg; |
Vlad Yasevich | 1f48564 | 2007-10-09 01:15:59 -0700 | [diff] [blame] | 332 | extern atomic_t sctp_dbg_objcnt_keys; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | |
| 334 | /* Macros to atomically increment/decrement objcnt counters. */ |
| 335 | #define SCTP_DBG_OBJCNT_INC(name) \ |
| 336 | atomic_inc(&sctp_dbg_objcnt_## name) |
| 337 | #define SCTP_DBG_OBJCNT_DEC(name) \ |
| 338 | atomic_dec(&sctp_dbg_objcnt_## name) |
| 339 | #define SCTP_DBG_OBJCNT(name) \ |
| 340 | atomic_t sctp_dbg_objcnt_## name = ATOMIC_INIT(0) |
| 341 | |
| 342 | /* Macro to help create new entries in in the global array of |
| 343 | * objcnt counters. |
| 344 | */ |
| 345 | #define SCTP_DBG_OBJCNT_ENTRY(name) \ |
| 346 | {.label= #name, .counter= &sctp_dbg_objcnt_## name} |
| 347 | |
| 348 | void sctp_dbg_objcnt_init(void); |
| 349 | void sctp_dbg_objcnt_exit(void); |
| 350 | |
| 351 | #else |
| 352 | |
| 353 | #define SCTP_DBG_OBJCNT_INC(name) |
| 354 | #define SCTP_DBG_OBJCNT_DEC(name) |
| 355 | |
| 356 | static inline void sctp_dbg_objcnt_init(void) { return; } |
| 357 | static inline void sctp_dbg_objcnt_exit(void) { return; } |
| 358 | |
| 359 | #endif /* CONFIG_SCTP_DBG_OBJCOUNT */ |
| 360 | |
| 361 | #if defined CONFIG_SYSCTL |
| 362 | void sctp_sysctl_register(void); |
| 363 | void sctp_sysctl_unregister(void); |
| 364 | #else |
| 365 | static inline void sctp_sysctl_register(void) { return; } |
| 366 | static inline void sctp_sysctl_unregister(void) { return; } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | #endif |
| 368 | |
| 369 | /* Size of Supported Address Parameter for 'x' address types. */ |
| 370 | #define SCTP_SAT_LEN(x) (sizeof(struct sctp_paramhdr) + (x) * sizeof(__u16)) |
| 371 | |
| 372 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
| 373 | |
Vlad Yasevich | 270637a | 2008-03-20 15:17:14 -0700 | [diff] [blame] | 374 | void sctp_v6_pf_init(void); |
| 375 | void sctp_v6_pf_exit(void); |
| 376 | int sctp_v6_protosw_init(void); |
| 377 | void sctp_v6_protosw_exit(void); |
Sridhar Samudrala | 827bf12 | 2007-05-04 13:36:30 -0700 | [diff] [blame] | 378 | int sctp_v6_add_protocol(void); |
| 379 | void sctp_v6_del_protocol(void); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | |
| 381 | #else /* #ifdef defined(CONFIG_IPV6) */ |
| 382 | |
David S. Miller | 1233823 | 2008-03-21 15:40:47 -0700 | [diff] [blame] | 383 | static inline void sctp_v6_pf_init(void) { return; } |
Vlad Yasevich | 270637a | 2008-03-20 15:17:14 -0700 | [diff] [blame] | 384 | static inline void sctp_v6_pf_exit(void) { return; } |
| 385 | static inline int sctp_v6_protosw_init(void) { return 0; } |
| 386 | static inline void sctp_v6_protosw_exit(void) { return; } |
Sridhar Samudrala | 827bf12 | 2007-05-04 13:36:30 -0700 | [diff] [blame] | 387 | static inline int sctp_v6_add_protocol(void) { return 0; } |
| 388 | static inline void sctp_v6_del_protocol(void) { return; } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | |
| 390 | #endif /* #if defined(CONFIG_IPV6) */ |
| 391 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 392 | |
| 393 | /* Map an association to an assoc_id. */ |
| 394 | static inline sctp_assoc_t sctp_assoc2id(const struct sctp_association *asoc) |
| 395 | { |
| 396 | return (asoc?asoc->assoc_id:0); |
| 397 | } |
| 398 | |
| 399 | /* Look up the association by its id. */ |
| 400 | struct sctp_association *sctp_id2assoc(struct sock *sk, sctp_assoc_t id); |
| 401 | |
| 402 | |
| 403 | /* A macro to walk a list of skbs. */ |
| 404 | #define sctp_skb_for_each(pos, head, tmp) \ |
David S. Miller | 3d09274 | 2008-09-22 22:14:36 -0700 | [diff] [blame] | 405 | skb_queue_walk_safe(head, pos, tmp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | |
| 407 | /* A helper to append an entire skb list (list) to another (head). */ |
| 408 | static inline void sctp_skb_list_tail(struct sk_buff_head *list, |
| 409 | struct sk_buff_head *head) |
| 410 | { |
| 411 | unsigned long flags; |
| 412 | |
| 413 | sctp_spin_lock_irqsave(&head->lock, flags); |
| 414 | sctp_spin_lock(&list->lock); |
| 415 | |
David S. Miller | 3d09274 | 2008-09-22 22:14:36 -0700 | [diff] [blame] | 416 | skb_queue_splice_tail_init(list, head); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | |
| 418 | sctp_spin_unlock(&list->lock); |
| 419 | sctp_spin_unlock_irqrestore(&head->lock, flags); |
| 420 | } |
| 421 | |
| 422 | /** |
| 423 | * sctp_list_dequeue - remove from the head of the queue |
| 424 | * @list: list to dequeue from |
| 425 | * |
| 426 | * Remove the head of the list. The head item is |
| 427 | * returned or %NULL if the list is empty. |
| 428 | */ |
| 429 | |
| 430 | static inline struct list_head *sctp_list_dequeue(struct list_head *list) |
| 431 | { |
| 432 | struct list_head *result = NULL; |
| 433 | |
| 434 | if (list->next != list) { |
| 435 | result = list->next; |
| 436 | list->next = result->next; |
| 437 | list->next->prev = list; |
| 438 | INIT_LIST_HEAD(result); |
| 439 | } |
| 440 | return result; |
| 441 | } |
| 442 | |
Vlad Yasevich | 331c4ee | 2006-10-09 21:34:04 -0700 | [diff] [blame] | 443 | /* SCTP version of skb_set_owner_r. We need this one because |
| 444 | * of the way we have to do receive buffer accounting on bundled |
| 445 | * chunks. |
| 446 | */ |
| 447 | static inline void sctp_skb_set_owner_r(struct sk_buff *skb, struct sock *sk) |
| 448 | { |
| 449 | struct sctp_ulpevent *event = sctp_skb2event(skb); |
| 450 | |
| 451 | skb->sk = sk; |
| 452 | skb->destructor = sctp_sock_rfree; |
| 453 | atomic_add(event->rmem_len, &sk->sk_rmem_alloc); |
Neil Horman | 4d93df0 | 2007-08-15 16:07:44 -0700 | [diff] [blame] | 454 | /* |
Hideo Aoki | 3ab224b | 2007-12-31 00:11:19 -0800 | [diff] [blame] | 455 | * This mimics the behavior of skb_set_owner_r |
Neil Horman | 4d93df0 | 2007-08-15 16:07:44 -0700 | [diff] [blame] | 456 | */ |
| 457 | sk->sk_forward_alloc -= event->rmem_len; |
Vlad Yasevich | 331c4ee | 2006-10-09 21:34:04 -0700 | [diff] [blame] | 458 | } |
| 459 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 460 | /* Tests if the list has one and only one entry. */ |
| 461 | static inline int sctp_list_single_entry(struct list_head *head) |
| 462 | { |
| 463 | return ((head->next != head) && (head->next == head->prev)); |
| 464 | } |
| 465 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 466 | /* Generate a random jitter in the range of -50% ~ +50% of input RTO. */ |
| 467 | static inline __s32 sctp_jitter(__u32 rto) |
| 468 | { |
| 469 | static __u32 sctp_rand; |
| 470 | __s32 ret; |
| 471 | |
| 472 | /* Avoid divide by zero. */ |
| 473 | if (!rto) |
| 474 | rto = 1; |
| 475 | |
| 476 | sctp_rand += jiffies; |
| 477 | sctp_rand ^= (sctp_rand << 12); |
| 478 | sctp_rand ^= (sctp_rand >> 20); |
| 479 | |
| 480 | /* Choose random number from 0 to rto, then move to -50% ~ +50% |
| 481 | * of rto. |
| 482 | */ |
| 483 | ret = sctp_rand % rto - (rto >> 1); |
| 484 | return ret; |
| 485 | } |
| 486 | |
| 487 | /* Break down data chunks at this point. */ |
| 488 | static inline int sctp_frag_point(const struct sctp_sock *sp, int pmtu) |
| 489 | { |
| 490 | int frag = pmtu; |
| 491 | |
| 492 | frag -= sp->pf->af->net_header_len; |
| 493 | frag -= sizeof(struct sctphdr) + sizeof(struct sctp_data_chunk); |
| 494 | |
| 495 | if (sp->user_frag) |
| 496 | frag = min_t(int, frag, sp->user_frag); |
| 497 | |
| 498 | frag = min_t(int, frag, SCTP_MAX_CHUNK_LEN); |
| 499 | |
| 500 | return frag; |
| 501 | } |
| 502 | |
Vlad Yasevich | 8a47949 | 2007-06-07 14:21:05 -0400 | [diff] [blame] | 503 | static inline void sctp_assoc_pending_pmtu(struct sctp_association *asoc) |
| 504 | { |
| 505 | |
| 506 | sctp_assoc_sync_pmtu(asoc); |
| 507 | asoc->pmtu_pending = 0; |
| 508 | } |
| 509 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 510 | /* Walk through a list of TLV parameters. Don't trust the |
| 511 | * individual parameter lengths and instead depend on |
| 512 | * the chunk length to indicate when to stop. Make sure |
| 513 | * there is room for a param header too. |
| 514 | */ |
| 515 | #define sctp_walk_params(pos, chunk, member)\ |
Vladislav Yasevich | dd2d1c6 | 2006-05-19 11:52:20 -0700 | [diff] [blame] | 516 | _sctp_walk_params((pos), (chunk), ntohs((chunk)->chunk_hdr.length), member) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | |
| 518 | #define _sctp_walk_params(pos, chunk, end, member)\ |
| 519 | for (pos.v = chunk->member;\ |
| 520 | pos.v <= (void *)chunk + end - sizeof(sctp_paramhdr_t) &&\ |
Vladislav Yasevich | dd2d1c6 | 2006-05-19 11:52:20 -0700 | [diff] [blame] | 521 | pos.v <= (void *)chunk + end - ntohs(pos.p->length) &&\ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | ntohs(pos.p->length) >= sizeof(sctp_paramhdr_t);\ |
| 523 | pos.v += WORD_ROUND(ntohs(pos.p->length))) |
| 524 | |
| 525 | #define sctp_walk_errors(err, chunk_hdr)\ |
| 526 | _sctp_walk_errors((err), (chunk_hdr), ntohs((chunk_hdr)->length)) |
| 527 | |
| 528 | #define _sctp_walk_errors(err, chunk_hdr, end)\ |
| 529 | for (err = (sctp_errhdr_t *)((void *)chunk_hdr + \ |
| 530 | sizeof(sctp_chunkhdr_t));\ |
| 531 | (void *)err <= (void *)chunk_hdr + end - sizeof(sctp_errhdr_t) &&\ |
Vladislav Yasevich | dd2d1c6 | 2006-05-19 11:52:20 -0700 | [diff] [blame] | 532 | (void *)err <= (void *)chunk_hdr + end - ntohs(err->length) &&\ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 533 | ntohs(err->length) >= sizeof(sctp_errhdr_t); \ |
| 534 | err = (sctp_errhdr_t *)((void *)err + WORD_ROUND(ntohs(err->length)))) |
| 535 | |
| 536 | #define sctp_walk_fwdtsn(pos, chunk)\ |
| 537 | _sctp_walk_fwdtsn((pos), (chunk), ntohs((chunk)->chunk_hdr->length) - sizeof(struct sctp_fwdtsn_chunk)) |
| 538 | |
| 539 | #define _sctp_walk_fwdtsn(pos, chunk, end)\ |
| 540 | for (pos = chunk->subh.fwdtsn_hdr->skip;\ |
| 541 | (void *)pos <= (void *)chunk->subh.fwdtsn_hdr->skip + end - sizeof(struct sctp_fwdtsn_skip);\ |
| 542 | pos++) |
| 543 | |
| 544 | /* Round an int up to the next multiple of 4. */ |
| 545 | #define WORD_ROUND(s) (((s)+3)&~3) |
| 546 | |
| 547 | /* Make a new instance of type. */ |
| 548 | #define t_new(type, flags) (type *)kmalloc(sizeof(type), flags) |
| 549 | |
| 550 | /* Compare two timevals. */ |
| 551 | #define tv_lt(s, t) \ |
| 552 | (s.tv_sec < t.tv_sec || (s.tv_sec == t.tv_sec && s.tv_usec < t.tv_usec)) |
| 553 | |
| 554 | /* Add tv1 to tv2. */ |
| 555 | #define TIMEVAL_ADD(tv1, tv2) \ |
| 556 | ({ \ |
| 557 | suseconds_t usecs = (tv2).tv_usec + (tv1).tv_usec; \ |
| 558 | time_t secs = (tv2).tv_sec + (tv1).tv_sec; \ |
| 559 | \ |
| 560 | if (usecs >= 1000000) { \ |
| 561 | usecs -= 1000000; \ |
| 562 | secs++; \ |
| 563 | } \ |
| 564 | (tv2).tv_sec = secs; \ |
| 565 | (tv2).tv_usec = usecs; \ |
| 566 | }) |
| 567 | |
| 568 | /* External references. */ |
| 569 | |
| 570 | extern struct proto sctp_prot; |
| 571 | extern struct proto sctpv6_prot; |
| 572 | extern struct proc_dir_entry *proc_net_sctp; |
| 573 | void sctp_put_port(struct sock *sk); |
| 574 | |
| 575 | extern struct idr sctp_assocs_id; |
| 576 | extern spinlock_t sctp_assocs_id_lock; |
| 577 | |
| 578 | /* Static inline functions. */ |
| 579 | |
| 580 | /* Convert from an IP version number to an Address Family symbol. */ |
| 581 | static inline int ipver2af(__u8 ipver) |
| 582 | { |
| 583 | switch (ipver) { |
| 584 | case 4: |
| 585 | return AF_INET; |
| 586 | case 6: |
| 587 | return AF_INET6; |
| 588 | default: |
| 589 | return 0; |
| 590 | }; |
| 591 | } |
| 592 | |
| 593 | /* Convert from an address parameter type to an address family. */ |
Al Viro | dbc16db | 2006-11-20 17:01:42 -0800 | [diff] [blame] | 594 | static inline int param_type2af(__be16 type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 595 | { |
| 596 | switch (type) { |
| 597 | case SCTP_PARAM_IPV4_ADDRESS: |
| 598 | return AF_INET; |
| 599 | case SCTP_PARAM_IPV6_ADDRESS: |
| 600 | return AF_INET6; |
| 601 | default: |
| 602 | return 0; |
| 603 | }; |
| 604 | } |
| 605 | |
| 606 | /* Perform some sanity checks. */ |
| 607 | static inline int sctp_sanity_check(void) |
| 608 | { |
| 609 | SCTP_ASSERT(sizeof(struct sctp_ulpevent) <= |
| 610 | sizeof(((struct sk_buff *)0)->cb), |
| 611 | "SCTP: ulpevent does not fit in skb!\n", return 0); |
| 612 | |
| 613 | return 1; |
| 614 | } |
| 615 | |
| 616 | /* Warning: The following hash functions assume a power of two 'size'. */ |
| 617 | /* This is the hash function for the SCTP port hash table. */ |
| 618 | static inline int sctp_phashfn(__u16 lport) |
| 619 | { |
| 620 | return (lport & (sctp_port_hashsize - 1)); |
| 621 | } |
| 622 | |
| 623 | /* This is the hash function for the endpoint hash table. */ |
| 624 | static inline int sctp_ep_hashfn(__u16 lport) |
| 625 | { |
| 626 | return (lport & (sctp_ep_hashsize - 1)); |
| 627 | } |
| 628 | |
| 629 | /* This is the hash function for the association hash table. */ |
| 630 | static inline int sctp_assoc_hashfn(__u16 lport, __u16 rport) |
| 631 | { |
| 632 | int h = (lport << 16) + rport; |
| 633 | h ^= h>>8; |
| 634 | return (h & (sctp_assoc_hashsize - 1)); |
| 635 | } |
| 636 | |
| 637 | /* This is the hash function for the association hash table. This is |
| 638 | * not used yet, but could be used as a better hash function when |
| 639 | * we have a vtag. |
| 640 | */ |
| 641 | static inline int sctp_vtag_hashfn(__u16 lport, __u16 rport, __u32 vtag) |
| 642 | { |
| 643 | int h = (lport << 16) + rport; |
| 644 | h ^= vtag; |
| 645 | return (h & (sctp_assoc_hashsize-1)); |
| 646 | } |
| 647 | |
Vlad Yasevich | d970dbf | 2007-11-09 11:43:40 -0500 | [diff] [blame] | 648 | #define sctp_for_each_hentry(epb, node, head) \ |
| 649 | hlist_for_each_entry(epb, node, head, node) |
| 650 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 651 | /* Is a socket of this style? */ |
| 652 | #define sctp_style(sk, style) __sctp_style((sk), (SCTP_SOCKET_##style)) |
| 653 | static inline int __sctp_style(const struct sock *sk, sctp_socket_type_t style) |
| 654 | { |
| 655 | return sctp_sk(sk)->type == style; |
| 656 | } |
| 657 | |
| 658 | /* Is the association in this state? */ |
| 659 | #define sctp_state(asoc, state) __sctp_state((asoc), (SCTP_STATE_##state)) |
| 660 | static inline int __sctp_state(const struct sctp_association *asoc, |
| 661 | sctp_state_t state) |
| 662 | { |
| 663 | return asoc->state == state; |
| 664 | } |
| 665 | |
| 666 | /* Is the socket in this state? */ |
| 667 | #define sctp_sstate(sk, state) __sctp_sstate((sk), (SCTP_SS_##state)) |
| 668 | static inline int __sctp_sstate(const struct sock *sk, sctp_sock_state_t state) |
| 669 | { |
| 670 | return sk->sk_state == state; |
| 671 | } |
| 672 | |
| 673 | /* Map v4-mapped v6 address back to v4 address */ |
| 674 | static inline void sctp_v6_map_v4(union sctp_addr *addr) |
| 675 | { |
| 676 | addr->v4.sin_family = AF_INET; |
| 677 | addr->v4.sin_port = addr->v6.sin6_port; |
| 678 | addr->v4.sin_addr.s_addr = addr->v6.sin6_addr.s6_addr32[3]; |
| 679 | } |
| 680 | |
| 681 | /* Map v4 address to v4-mapped v6 address */ |
| 682 | static inline void sctp_v4_map_v6(union sctp_addr *addr) |
| 683 | { |
| 684 | addr->v6.sin6_family = AF_INET6; |
| 685 | addr->v6.sin6_port = addr->v4.sin_port; |
| 686 | addr->v6.sin6_addr.s6_addr32[3] = addr->v4.sin_addr.s_addr; |
| 687 | addr->v6.sin6_addr.s6_addr32[0] = 0; |
| 688 | addr->v6.sin6_addr.s6_addr32[1] = 0; |
| 689 | addr->v6.sin6_addr.s6_addr32[2] = htonl(0x0000ffff); |
| 690 | } |
| 691 | |
| 692 | #endif /* __net_sctp_h__ */ |