Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * INET An implementation of the TCP/IP protocol suite for the LINUX |
| 3 | * operating system. INET is implemented using the BSD Socket |
| 4 | * interface as the means of communication with the user level. |
| 5 | * |
| 6 | * PF_INET protocol family socket handler. |
| 7 | * |
Jesper Juhl | 02c30a8 | 2005-05-05 16:16:16 -0700 | [diff] [blame] | 8 | * Authors: Ross Biro |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> |
| 10 | * Florian La Roche, <flla@stud.uni-sb.de> |
| 11 | * Alan Cox, <A.Cox@swansea.ac.uk> |
| 12 | * |
| 13 | * Changes (see also sock.c) |
| 14 | * |
| 15 | * piggy, |
| 16 | * Karl Knutson : Socket protocol table |
| 17 | * A.N.Kuznetsov : Socket death error in accept(). |
| 18 | * John Richardson : Fix non blocking error in connect() |
| 19 | * so sockets that fail to connect |
| 20 | * don't return -EINPROGRESS. |
| 21 | * Alan Cox : Asynchronous I/O support |
| 22 | * Alan Cox : Keep correct socket pointer on sock |
| 23 | * structures |
| 24 | * when accept() ed |
| 25 | * Alan Cox : Semantics of SO_LINGER aren't state |
| 26 | * moved to close when you look carefully. |
| 27 | * With this fixed and the accept bug fixed |
| 28 | * some RPC stuff seems happier. |
| 29 | * Niibe Yutaka : 4.4BSD style write async I/O |
| 30 | * Alan Cox, |
| 31 | * Tony Gale : Fixed reuse semantics. |
| 32 | * Alan Cox : bind() shouldn't abort existing but dead |
| 33 | * sockets. Stops FTP netin:.. I hope. |
| 34 | * Alan Cox : bind() works correctly for RAW sockets. |
| 35 | * Note that FreeBSD at least was broken |
| 36 | * in this respect so be careful with |
| 37 | * compatibility tests... |
| 38 | * Alan Cox : routing cache support |
| 39 | * Alan Cox : memzero the socket structure for |
| 40 | * compactness. |
| 41 | * Matt Day : nonblock connect error handler |
| 42 | * Alan Cox : Allow large numbers of pending sockets |
| 43 | * (eg for big web sites), but only if |
| 44 | * specifically application requested. |
| 45 | * Alan Cox : New buffering throughout IP. Used |
| 46 | * dumbly. |
| 47 | * Alan Cox : New buffering now used smartly. |
| 48 | * Alan Cox : BSD rather than common sense |
| 49 | * interpretation of listen. |
| 50 | * Germano Caronni : Assorted small races. |
| 51 | * Alan Cox : sendmsg/recvmsg basic support. |
| 52 | * Alan Cox : Only sendmsg/recvmsg now supported. |
| 53 | * Alan Cox : Locked down bind (see security list). |
| 54 | * Alan Cox : Loosened bind a little. |
| 55 | * Mike McLagan : ADD/DEL DLCI Ioctls |
| 56 | * Willy Konynenberg : Transparent proxying support. |
| 57 | * David S. Miller : New socket lookup architecture. |
| 58 | * Some other random speedups. |
| 59 | * Cyrus Durgin : Cleaned up file for kmod hacks. |
| 60 | * Andi Kleen : Fix inet_stream_connect TCP race. |
| 61 | * |
| 62 | * This program is free software; you can redistribute it and/or |
| 63 | * modify it under the terms of the GNU General Public License |
| 64 | * as published by the Free Software Foundation; either version |
| 65 | * 2 of the License, or (at your option) any later version. |
| 66 | */ |
| 67 | |
Joe Perches | afd46503 | 2012-03-12 07:03:32 +0000 | [diff] [blame] | 68 | #define pr_fmt(fmt) "IPv4: " fmt |
| 69 | |
Herbert Xu | f4c50d9 | 2006-06-22 03:02:40 -0700 | [diff] [blame] | 70 | #include <linux/err.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | #include <linux/errno.h> |
| 72 | #include <linux/types.h> |
| 73 | #include <linux/socket.h> |
| 74 | #include <linux/in.h> |
| 75 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | #include <linux/module.h> |
| 77 | #include <linux/sched.h> |
| 78 | #include <linux/timer.h> |
| 79 | #include <linux/string.h> |
| 80 | #include <linux/sockios.h> |
| 81 | #include <linux/net.h> |
Randy Dunlap | 4fc268d | 2006-01-11 12:17:47 -0800 | [diff] [blame] | 82 | #include <linux/capability.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | #include <linux/fcntl.h> |
| 84 | #include <linux/mm.h> |
| 85 | #include <linux/interrupt.h> |
| 86 | #include <linux/stat.h> |
| 87 | #include <linux/init.h> |
| 88 | #include <linux/poll.h> |
| 89 | #include <linux/netfilter_ipv4.h> |
David S. Miller | b3da2cf | 2007-03-23 11:40:27 -0700 | [diff] [blame] | 90 | #include <linux/random.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 91 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | |
| 93 | #include <asm/uaccess.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | #include <linux/inet.h> |
| 96 | #include <linux/igmp.h> |
Arnaldo Carvalho de Melo | 14c8502 | 2005-12-27 02:43:12 -0200 | [diff] [blame] | 97 | #include <linux/inetdevice.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | #include <linux/netdevice.h> |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 99 | #include <net/checksum.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | #include <net/ip.h> |
| 101 | #include <net/protocol.h> |
| 102 | #include <net/arp.h> |
| 103 | #include <net/route.h> |
| 104 | #include <net/ip_fib.h> |
Arnaldo Carvalho de Melo | 295f732 | 2005-08-09 20:11:56 -0700 | [diff] [blame] | 105 | #include <net/inet_connection_sock.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | #include <net/tcp.h> |
| 107 | #include <net/udp.h> |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 108 | #include <net/udplite.h> |
Vasiliy Kulikov | c319b4d | 2011-05-13 10:01:00 +0000 | [diff] [blame] | 109 | #include <net/ping.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | #include <linux/skbuff.h> |
| 111 | #include <net/sock.h> |
| 112 | #include <net/raw.h> |
| 113 | #include <net/icmp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | #include <net/inet_common.h> |
| 115 | #include <net/xfrm.h> |
Pavel Emelyanov | 9b4661b | 2008-07-18 04:01:44 -0700 | [diff] [blame] | 116 | #include <net/net_namespace.h> |
Eric Dumazet | aebda15 | 2013-04-29 05:58:52 +0000 | [diff] [blame] | 117 | #include <net/secure_seq.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | #ifdef CONFIG_IP_MROUTE |
| 119 | #include <linux/mroute.h> |
| 120 | #endif |
| 121 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | |
| 123 | /* The inetsw table contains everything that inet_create needs to |
| 124 | * build a new socket. |
| 125 | */ |
| 126 | static struct list_head inetsw[SOCK_MAX]; |
| 127 | static DEFINE_SPINLOCK(inetsw_lock); |
| 128 | |
Pavel Emelyanov | 9ba6397 | 2007-12-05 01:38:23 -0800 | [diff] [blame] | 129 | struct ipv4_config ipv4_config; |
Pavel Emelyanov | 9ba6397 | 2007-12-05 01:38:23 -0800 | [diff] [blame] | 130 | EXPORT_SYMBOL(ipv4_config); |
| 131 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | /* New destruction routine */ |
| 133 | |
| 134 | void inet_sock_destruct(struct sock *sk) |
| 135 | { |
| 136 | struct inet_sock *inet = inet_sk(sk); |
| 137 | |
| 138 | __skb_queue_purge(&sk->sk_receive_queue); |
| 139 | __skb_queue_purge(&sk->sk_error_queue); |
| 140 | |
Hideo Aoki | 95766ff | 2007-12-31 00:29:24 -0800 | [diff] [blame] | 141 | sk_mem_reclaim(sk); |
| 142 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | if (sk->sk_type == SOCK_STREAM && sk->sk_state != TCP_CLOSE) { |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 144 | pr_err("Attempt to release TCP socket in state %d %p\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | sk->sk_state, sk); |
| 146 | return; |
| 147 | } |
| 148 | if (!sock_flag(sk, SOCK_DEAD)) { |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 149 | pr_err("Attempt to release alive inet socket %p\n", sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | return; |
| 151 | } |
| 152 | |
Ilpo Järvinen | 547b792 | 2008-07-25 21:43:18 -0700 | [diff] [blame] | 153 | WARN_ON(atomic_read(&sk->sk_rmem_alloc)); |
| 154 | WARN_ON(atomic_read(&sk->sk_wmem_alloc)); |
| 155 | WARN_ON(sk->sk_wmem_queued); |
| 156 | WARN_ON(sk->sk_forward_alloc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | |
Eric Dumazet | f6d8bd0 | 2011-04-21 09:45:37 +0000 | [diff] [blame] | 158 | kfree(rcu_dereference_protected(inet->inet_opt, 1)); |
Eric Dumazet | b6c6712 | 2010-04-08 23:03:29 +0000 | [diff] [blame] | 159 | dst_release(rcu_dereference_check(sk->sk_dst_cache, 1)); |
David S. Miller | 41063e9 | 2012-06-19 21:22:05 -0700 | [diff] [blame] | 160 | dst_release(sk->sk_rx_dst); |
Arnaldo Carvalho de Melo | e684897 | 2005-08-09 19:45:38 -0700 | [diff] [blame] | 161 | sk_refcnt_debug_dec(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | } |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 163 | EXPORT_SYMBOL(inet_sock_destruct); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | |
| 165 | /* |
| 166 | * The routines beyond this point handle the behaviour of an AF_INET |
| 167 | * socket object. Mostly it punts to the subprotocols of IP to do |
| 168 | * the work. |
| 169 | */ |
| 170 | |
| 171 | /* |
| 172 | * Automatically bind an unbound socket. |
| 173 | */ |
| 174 | |
| 175 | static int inet_autobind(struct sock *sk) |
| 176 | { |
| 177 | struct inet_sock *inet; |
| 178 | /* We may need to bind the socket. */ |
| 179 | lock_sock(sk); |
| 180 | inet = inet_sk(sk); |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 181 | if (!inet->inet_num) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | if (sk->sk_prot->get_port(sk, 0)) { |
| 183 | release_sock(sk); |
| 184 | return -EAGAIN; |
| 185 | } |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 186 | inet->inet_sport = htons(inet->inet_num); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | } |
| 188 | release_sock(sk); |
| 189 | return 0; |
| 190 | } |
| 191 | |
| 192 | /* |
| 193 | * Move a socket into listening state. |
| 194 | */ |
| 195 | int inet_listen(struct socket *sock, int backlog) |
| 196 | { |
| 197 | struct sock *sk = sock->sk; |
| 198 | unsigned char old_state; |
| 199 | int err; |
| 200 | |
| 201 | lock_sock(sk); |
| 202 | |
| 203 | err = -EINVAL; |
| 204 | if (sock->state != SS_UNCONNECTED || sock->type != SOCK_STREAM) |
| 205 | goto out; |
| 206 | |
| 207 | old_state = sk->sk_state; |
| 208 | if (!((1 << old_state) & (TCPF_CLOSE | TCPF_LISTEN))) |
| 209 | goto out; |
| 210 | |
| 211 | /* Really, if the socket is already in listen state |
| 212 | * we can only allow the backlog to be adjusted. |
| 213 | */ |
| 214 | if (old_state != TCP_LISTEN) { |
Jerry Chu | 8336886 | 2012-08-31 12:29:12 +0000 | [diff] [blame] | 215 | /* Check special setups for testing purpose to enable TFO w/o |
| 216 | * requiring TCP_FASTOPEN sockopt. |
| 217 | * Note that only TCP sockets (SOCK_STREAM) will reach here. |
| 218 | * Also fastopenq may already been allocated because this |
| 219 | * socket was in TCP_LISTEN state previously but was |
| 220 | * shutdown() (rather than close()). |
| 221 | */ |
| 222 | if ((sysctl_tcp_fastopen & TFO_SERVER_ENABLE) != 0 && |
| 223 | inet_csk(sk)->icsk_accept_queue.fastopenq == NULL) { |
| 224 | if ((sysctl_tcp_fastopen & TFO_SERVER_WO_SOCKOPT1) != 0) |
| 225 | err = fastopen_init_queue(sk, backlog); |
| 226 | else if ((sysctl_tcp_fastopen & |
| 227 | TFO_SERVER_WO_SOCKOPT2) != 0) |
| 228 | err = fastopen_init_queue(sk, |
| 229 | ((uint)sysctl_tcp_fastopen) >> 16); |
| 230 | else |
| 231 | err = 0; |
| 232 | if (err) |
| 233 | goto out; |
| 234 | } |
Eric Dumazet | 72a3eff | 2006-11-16 02:30:37 -0800 | [diff] [blame] | 235 | err = inet_csk_listen_start(sk, backlog); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | if (err) |
| 237 | goto out; |
| 238 | } |
| 239 | sk->sk_max_ack_backlog = backlog; |
| 240 | err = 0; |
| 241 | |
| 242 | out: |
| 243 | release_sock(sk); |
| 244 | return err; |
| 245 | } |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 246 | EXPORT_SYMBOL(inet_listen); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | |
| 248 | /* |
| 249 | * Create an inet socket. |
| 250 | */ |
| 251 | |
Eric Paris | 3f378b6 | 2009-11-05 22:18:14 -0800 | [diff] [blame] | 252 | static int inet_create(struct net *net, struct socket *sock, int protocol, |
| 253 | int kern) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | { |
| 255 | struct sock *sk; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | struct inet_protosw *answer; |
| 257 | struct inet_sock *inet; |
| 258 | struct proto *answer_prot; |
| 259 | unsigned char answer_flags; |
| 260 | char answer_no_check; |
Arnaldo Carvalho de Melo | bb97d31 | 2005-08-09 20:19:14 -0700 | [diff] [blame] | 261 | int try_loading_module = 0; |
Herbert Xu | 86c8f9d | 2005-12-02 20:43:26 -0800 | [diff] [blame] | 262 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | |
| 264 | sock->state = SS_UNCONNECTED; |
| 265 | |
| 266 | /* Look for the requested type/protocol pair. */ |
Arnaldo Carvalho de Melo | bb97d31 | 2005-08-09 20:19:14 -0700 | [diff] [blame] | 267 | lookup_protocol: |
Herbert Xu | 86c8f9d | 2005-12-02 20:43:26 -0800 | [diff] [blame] | 268 | err = -ESOCKTNOSUPPORT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | rcu_read_lock(); |
Paul E. McKenney | 696adfe | 2008-07-25 01:45:34 -0700 | [diff] [blame] | 270 | list_for_each_entry_rcu(answer, &inetsw[sock->type], list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | |
Paul E. McKenney | 696adfe | 2008-07-25 01:45:34 -0700 | [diff] [blame] | 272 | err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | /* Check the non-wild match. */ |
| 274 | if (protocol == answer->protocol) { |
| 275 | if (protocol != IPPROTO_IP) |
| 276 | break; |
| 277 | } else { |
| 278 | /* Check for the two wild cases. */ |
| 279 | if (IPPROTO_IP == protocol) { |
| 280 | protocol = answer->protocol; |
| 281 | break; |
| 282 | } |
| 283 | if (IPPROTO_IP == answer->protocol) |
| 284 | break; |
| 285 | } |
Herbert Xu | 86c8f9d | 2005-12-02 20:43:26 -0800 | [diff] [blame] | 286 | err = -EPROTONOSUPPORT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | } |
| 288 | |
Paul E. McKenney | 696adfe | 2008-07-25 01:45:34 -0700 | [diff] [blame] | 289 | if (unlikely(err)) { |
Arnaldo Carvalho de Melo | bb97d31 | 2005-08-09 20:19:14 -0700 | [diff] [blame] | 290 | if (try_loading_module < 2) { |
| 291 | rcu_read_unlock(); |
| 292 | /* |
| 293 | * Be more specific, e.g. net-pf-2-proto-132-type-1 |
| 294 | * (net-pf-PF_INET-proto-IPPROTO_SCTP-type-SOCK_STREAM) |
| 295 | */ |
| 296 | if (++try_loading_module == 1) |
| 297 | request_module("net-pf-%d-proto-%d-type-%d", |
| 298 | PF_INET, protocol, sock->type); |
| 299 | /* |
| 300 | * Fall back to generic, e.g. net-pf-2-proto-132 |
| 301 | * (net-pf-PF_INET-proto-IPPROTO_SCTP) |
| 302 | */ |
| 303 | else |
| 304 | request_module("net-pf-%d-proto-%d", |
| 305 | PF_INET, protocol); |
| 306 | goto lookup_protocol; |
| 307 | } else |
| 308 | goto out_rcu_unlock; |
| 309 | } |
| 310 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 311 | err = -EPERM; |
Eric W. Biederman | 52e804c | 2012-11-16 03:03:05 +0000 | [diff] [blame] | 312 | if (sock->type == SOCK_RAW && !kern && |
| 313 | !ns_capable(net->user_ns, CAP_NET_RAW)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | goto out_rcu_unlock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | |
| 316 | sock->ops = answer->ops; |
| 317 | answer_prot = answer->prot; |
| 318 | answer_no_check = answer->no_check; |
| 319 | answer_flags = answer->flags; |
| 320 | rcu_read_unlock(); |
| 321 | |
Ilpo Järvinen | 547b792 | 2008-07-25 21:43:18 -0700 | [diff] [blame] | 322 | WARN_ON(answer_prot->slab == NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | |
| 324 | err = -ENOBUFS; |
Pavel Emelyanov | 6257ff2 | 2007-11-01 00:39:31 -0700 | [diff] [blame] | 325 | sk = sk_alloc(net, PF_INET, GFP_KERNEL, answer_prot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | if (sk == NULL) |
| 327 | goto out; |
| 328 | |
| 329 | err = 0; |
| 330 | sk->sk_no_check = answer_no_check; |
| 331 | if (INET_PROTOSW_REUSE & answer_flags) |
Pavel Emelyanov | 4a17fd5 | 2012-04-19 03:39:36 +0000 | [diff] [blame] | 332 | sk->sk_reuse = SK_CAN_REUSE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | |
| 334 | inet = inet_sk(sk); |
Paul Moore | 469de9b | 2007-01-09 14:37:06 -0800 | [diff] [blame] | 335 | inet->is_icsk = (INET_PROTOSW_ICSK & answer_flags) != 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | |
Jiri Olsa | 7b2ff18 | 2010-06-15 01:07:31 +0000 | [diff] [blame] | 337 | inet->nodefrag = 0; |
| 338 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | if (SOCK_RAW == sock->type) { |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 340 | inet->inet_num = protocol; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | if (IPPROTO_RAW == protocol) |
| 342 | inet->hdrincl = 1; |
| 343 | } |
| 344 | |
| 345 | if (ipv4_config.no_pmtu_disc) |
| 346 | inet->pmtudisc = IP_PMTUDISC_DONT; |
| 347 | else |
| 348 | inet->pmtudisc = IP_PMTUDISC_WANT; |
| 349 | |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 350 | inet->inet_id = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | |
| 352 | sock_init_data(sock, sk); |
| 353 | |
| 354 | sk->sk_destruct = inet_sock_destruct; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | sk->sk_protocol = protocol; |
| 356 | sk->sk_backlog_rcv = sk->sk_prot->backlog_rcv; |
| 357 | |
| 358 | inet->uc_ttl = -1; |
| 359 | inet->mc_loop = 1; |
| 360 | inet->mc_ttl = 1; |
Nivedita Singhvi | f771bef | 2009-05-28 07:00:46 +0000 | [diff] [blame] | 361 | inet->mc_all = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 362 | inet->mc_index = 0; |
| 363 | inet->mc_list = NULL; |
Jiri Benc | 4c507d2 | 2012-02-09 09:35:49 +0000 | [diff] [blame] | 364 | inet->rcv_tos = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | |
Arnaldo Carvalho de Melo | e684897 | 2005-08-09 19:45:38 -0700 | [diff] [blame] | 366 | sk_refcnt_debug_inc(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 368 | if (inet->inet_num) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | /* It assumes that any protocol which allows |
| 370 | * the user to assign a number at socket |
| 371 | * creation time automatically |
| 372 | * shares. |
| 373 | */ |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 374 | inet->inet_sport = htons(inet->inet_num); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | /* Add to protocol hash chains. */ |
| 376 | sk->sk_prot->hash(sk); |
| 377 | } |
| 378 | |
| 379 | if (sk->sk_prot->init) { |
| 380 | err = sk->sk_prot->init(sk); |
| 381 | if (err) |
| 382 | sk_common_release(sk); |
| 383 | } |
| 384 | out: |
| 385 | return err; |
| 386 | out_rcu_unlock: |
| 387 | rcu_read_unlock(); |
| 388 | goto out; |
| 389 | } |
| 390 | |
| 391 | |
| 392 | /* |
| 393 | * The peer socket should always be NULL (or else). When we call this |
| 394 | * function we are destroying the object and from then on nobody |
| 395 | * should refer to it. |
| 396 | */ |
| 397 | int inet_release(struct socket *sock) |
| 398 | { |
| 399 | struct sock *sk = sock->sk; |
| 400 | |
| 401 | if (sk) { |
| 402 | long timeout; |
| 403 | |
David S. Miller | c58dc01 | 2010-04-27 15:05:31 -0700 | [diff] [blame] | 404 | sock_rps_reset_flow(sk); |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 405 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | /* Applications forget to leave groups before exiting */ |
| 407 | ip_mc_drop_socket(sk); |
| 408 | |
| 409 | /* If linger is set, we don't return until the close |
| 410 | * is complete. Otherwise we return immediately. The |
| 411 | * actually closing is done the same either way. |
| 412 | * |
| 413 | * If the close is due to the process exiting, we never |
| 414 | * linger.. |
| 415 | */ |
| 416 | timeout = 0; |
| 417 | if (sock_flag(sk, SOCK_LINGER) && |
| 418 | !(current->flags & PF_EXITING)) |
| 419 | timeout = sk->sk_lingertime; |
| 420 | sock->sk = NULL; |
| 421 | sk->sk_prot->close(sk, timeout); |
| 422 | } |
| 423 | return 0; |
| 424 | } |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 425 | EXPORT_SYMBOL(inet_release); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 426 | |
| 427 | /* It is off by default, see below. */ |
Brian Haley | ab32ea5 | 2006-09-22 14:15:41 -0700 | [diff] [blame] | 428 | int sysctl_ip_nonlocal_bind __read_mostly; |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 429 | EXPORT_SYMBOL(sysctl_ip_nonlocal_bind); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | |
| 431 | int inet_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) |
| 432 | { |
| 433 | struct sockaddr_in *addr = (struct sockaddr_in *)uaddr; |
| 434 | struct sock *sk = sock->sk; |
| 435 | struct inet_sock *inet = inet_sk(sk); |
Eric W. Biederman | 3594698 | 2012-11-16 03:03:12 +0000 | [diff] [blame] | 436 | struct net *net = sock_net(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | unsigned short snum; |
| 438 | int chk_addr_ret; |
| 439 | int err; |
| 440 | |
| 441 | /* If the socket has its own bind function then use it. (RAW) */ |
| 442 | if (sk->sk_prot->bind) { |
| 443 | err = sk->sk_prot->bind(sk, uaddr, addr_len); |
| 444 | goto out; |
| 445 | } |
| 446 | err = -EINVAL; |
| 447 | if (addr_len < sizeof(struct sockaddr_in)) |
| 448 | goto out; |
| 449 | |
Marcus Meissner | c349a52 | 2011-07-04 01:30:29 +0000 | [diff] [blame] | 450 | if (addr->sin_family != AF_INET) { |
Eric Dumazet | 29c486d | 2011-08-30 18:57:00 -0400 | [diff] [blame] | 451 | /* Compatibility games : accept AF_UNSPEC (mapped to AF_INET) |
| 452 | * only if s_addr is INADDR_ANY. |
| 453 | */ |
Marcus Meissner | c349a52 | 2011-07-04 01:30:29 +0000 | [diff] [blame] | 454 | err = -EAFNOSUPPORT; |
Eric Dumazet | 29c486d | 2011-08-30 18:57:00 -0400 | [diff] [blame] | 455 | if (addr->sin_family != AF_UNSPEC || |
| 456 | addr->sin_addr.s_addr != htonl(INADDR_ANY)) |
| 457 | goto out; |
Marcus Meissner | c349a52 | 2011-07-04 01:30:29 +0000 | [diff] [blame] | 458 | } |
Marcus Meissner | d0733d2 | 2011-06-01 21:05:22 -0700 | [diff] [blame] | 459 | |
Eric W. Biederman | 3594698 | 2012-11-16 03:03:12 +0000 | [diff] [blame] | 460 | chk_addr_ret = inet_addr_type(net, addr->sin_addr.s_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 461 | |
| 462 | /* Not specified by any standard per-se, however it breaks too |
| 463 | * many applications when removed. It is unfortunate since |
| 464 | * allowing applications to make a non-local bind solves |
| 465 | * several problems with systems using dynamic addressing. |
| 466 | * (ie. your servers still start up even if your ISDN link |
| 467 | * is temporarily down) |
| 468 | */ |
| 469 | err = -EADDRNOTAVAIL; |
| 470 | if (!sysctl_ip_nonlocal_bind && |
Tóth László Attila | b9fb150 | 2008-10-01 07:31:24 -0700 | [diff] [blame] | 471 | !(inet->freebind || inet->transparent) && |
Al Viro | e6f1ceb | 2008-03-17 22:44:53 -0700 | [diff] [blame] | 472 | addr->sin_addr.s_addr != htonl(INADDR_ANY) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | chk_addr_ret != RTN_LOCAL && |
| 474 | chk_addr_ret != RTN_MULTICAST && |
| 475 | chk_addr_ret != RTN_BROADCAST) |
| 476 | goto out; |
| 477 | |
| 478 | snum = ntohs(addr->sin_port); |
| 479 | err = -EACCES; |
Eric W. Biederman | 3594698 | 2012-11-16 03:03:12 +0000 | [diff] [blame] | 480 | if (snum && snum < PROT_SOCK && |
| 481 | !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | goto out; |
| 483 | |
| 484 | /* We keep a pair of addresses. rcv_saddr is the one |
| 485 | * used by hash lookups, and saddr is used for transmit. |
| 486 | * |
| 487 | * In the BSD API these are the same except where it |
| 488 | * would be illegal to use them (multicast/broadcast) in |
| 489 | * which case the sending device address is used. |
| 490 | */ |
| 491 | lock_sock(sk); |
| 492 | |
| 493 | /* Check these errors (active socket, double bind). */ |
| 494 | err = -EINVAL; |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 495 | if (sk->sk_state != TCP_CLOSE || inet->inet_num) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | goto out_release_sock; |
| 497 | |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 498 | inet->inet_rcv_saddr = inet->inet_saddr = addr->sin_addr.s_addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 499 | if (chk_addr_ret == RTN_MULTICAST || chk_addr_ret == RTN_BROADCAST) |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 500 | inet->inet_saddr = 0; /* Use device */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | |
| 502 | /* Make sure we are allowed to bind here. */ |
| 503 | if (sk->sk_prot->get_port(sk, snum)) { |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 504 | inet->inet_saddr = inet->inet_rcv_saddr = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | err = -EADDRINUSE; |
| 506 | goto out_release_sock; |
| 507 | } |
| 508 | |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 509 | if (inet->inet_rcv_saddr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 510 | sk->sk_userlocks |= SOCK_BINDADDR_LOCK; |
| 511 | if (snum) |
| 512 | sk->sk_userlocks |= SOCK_BINDPORT_LOCK; |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 513 | inet->inet_sport = htons(inet->inet_num); |
| 514 | inet->inet_daddr = 0; |
| 515 | inet->inet_dport = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 516 | sk_dst_reset(sk); |
| 517 | err = 0; |
| 518 | out_release_sock: |
| 519 | release_sock(sk); |
| 520 | out: |
| 521 | return err; |
| 522 | } |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 523 | EXPORT_SYMBOL(inet_bind); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | |
Daniel Baluta | 5e73ea1 | 2012-04-15 01:34:41 +0000 | [diff] [blame] | 525 | int inet_dgram_connect(struct socket *sock, struct sockaddr *uaddr, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | int addr_len, int flags) |
| 527 | { |
| 528 | struct sock *sk = sock->sk; |
| 529 | |
Changli Gao | 6503d96 | 2010-03-31 22:58:26 +0000 | [diff] [blame] | 530 | if (addr_len < sizeof(uaddr->sa_family)) |
| 531 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 532 | if (uaddr->sa_family == AF_UNSPEC) |
| 533 | return sk->sk_prot->disconnect(sk, flags); |
| 534 | |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 535 | if (!inet_sk(sk)->inet_num && inet_autobind(sk)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | return -EAGAIN; |
Joe Perches | e319269 | 2012-06-03 17:41:40 +0000 | [diff] [blame] | 537 | return sk->sk_prot->connect(sk, uaddr, addr_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 538 | } |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 539 | EXPORT_SYMBOL(inet_dgram_connect); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 540 | |
Yuchung Cheng | 783237e | 2012-07-19 06:43:07 +0000 | [diff] [blame] | 541 | static long inet_wait_for_connect(struct sock *sk, long timeo, int writebias) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | { |
| 543 | DEFINE_WAIT(wait); |
| 544 | |
Eric Dumazet | aa39514 | 2010-04-20 13:03:51 +0000 | [diff] [blame] | 545 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); |
Yuchung Cheng | 783237e | 2012-07-19 06:43:07 +0000 | [diff] [blame] | 546 | sk->sk_write_pending += writebias; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 547 | |
| 548 | /* Basic assumption: if someone sets sk->sk_err, he _must_ |
| 549 | * change state of the socket from TCP_SYN_*. |
| 550 | * Connect() does not allow to get error notifications |
| 551 | * without closing the socket. |
| 552 | */ |
| 553 | while ((1 << sk->sk_state) & (TCPF_SYN_SENT | TCPF_SYN_RECV)) { |
| 554 | release_sock(sk); |
| 555 | timeo = schedule_timeout(timeo); |
| 556 | lock_sock(sk); |
| 557 | if (signal_pending(current) || !timeo) |
| 558 | break; |
Eric Dumazet | aa39514 | 2010-04-20 13:03:51 +0000 | [diff] [blame] | 559 | prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 560 | } |
Eric Dumazet | aa39514 | 2010-04-20 13:03:51 +0000 | [diff] [blame] | 561 | finish_wait(sk_sleep(sk), &wait); |
Yuchung Cheng | 783237e | 2012-07-19 06:43:07 +0000 | [diff] [blame] | 562 | sk->sk_write_pending -= writebias; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 563 | return timeo; |
| 564 | } |
| 565 | |
| 566 | /* |
| 567 | * Connect to a remote host. There is regrettably still a little |
| 568 | * TCP 'magic' in here. |
| 569 | */ |
Yuchung Cheng | cf60af0 | 2012-07-19 06:43:09 +0000 | [diff] [blame] | 570 | int __inet_stream_connect(struct socket *sock, struct sockaddr *uaddr, |
| 571 | int addr_len, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | { |
| 573 | struct sock *sk = sock->sk; |
| 574 | int err; |
| 575 | long timeo; |
| 576 | |
Changli Gao | 6503d96 | 2010-03-31 22:58:26 +0000 | [diff] [blame] | 577 | if (addr_len < sizeof(uaddr->sa_family)) |
| 578 | return -EINVAL; |
| 579 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 580 | if (uaddr->sa_family == AF_UNSPEC) { |
| 581 | err = sk->sk_prot->disconnect(sk, flags); |
| 582 | sock->state = err ? SS_DISCONNECTING : SS_UNCONNECTED; |
| 583 | goto out; |
| 584 | } |
| 585 | |
| 586 | switch (sock->state) { |
| 587 | default: |
| 588 | err = -EINVAL; |
| 589 | goto out; |
| 590 | case SS_CONNECTED: |
| 591 | err = -EISCONN; |
| 592 | goto out; |
| 593 | case SS_CONNECTING: |
| 594 | err = -EALREADY; |
| 595 | /* Fall out of switch with err, set for this state */ |
| 596 | break; |
| 597 | case SS_UNCONNECTED: |
| 598 | err = -EISCONN; |
| 599 | if (sk->sk_state != TCP_CLOSE) |
| 600 | goto out; |
| 601 | |
| 602 | err = sk->sk_prot->connect(sk, uaddr, addr_len); |
| 603 | if (err < 0) |
| 604 | goto out; |
| 605 | |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 606 | sock->state = SS_CONNECTING; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 607 | |
| 608 | /* Just entered SS_CONNECTING state; the only |
| 609 | * difference is that return value in non-blocking |
| 610 | * case is EINPROGRESS, rather than EALREADY. |
| 611 | */ |
| 612 | err = -EINPROGRESS; |
| 613 | break; |
| 614 | } |
| 615 | |
| 616 | timeo = sock_sndtimeo(sk, flags & O_NONBLOCK); |
| 617 | |
| 618 | if ((1 << sk->sk_state) & (TCPF_SYN_SENT | TCPF_SYN_RECV)) { |
Yuchung Cheng | 783237e | 2012-07-19 06:43:07 +0000 | [diff] [blame] | 619 | int writebias = (sk->sk_protocol == IPPROTO_TCP) && |
| 620 | tcp_sk(sk)->fastopen_req && |
| 621 | tcp_sk(sk)->fastopen_req->data ? 1 : 0; |
| 622 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 623 | /* Error code is set above */ |
Yuchung Cheng | 783237e | 2012-07-19 06:43:07 +0000 | [diff] [blame] | 624 | if (!timeo || !inet_wait_for_connect(sk, timeo, writebias)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 625 | goto out; |
| 626 | |
| 627 | err = sock_intr_errno(timeo); |
| 628 | if (signal_pending(current)) |
| 629 | goto out; |
| 630 | } |
| 631 | |
| 632 | /* Connection was closed by RST, timeout, ICMP error |
| 633 | * or another process disconnected us. |
| 634 | */ |
| 635 | if (sk->sk_state == TCP_CLOSE) |
| 636 | goto sock_error; |
| 637 | |
| 638 | /* sk->sk_err may be not zero now, if RECVERR was ordered by user |
| 639 | * and error was received after socket entered established state. |
| 640 | * Hence, it is handled normally after connect() return successfully. |
| 641 | */ |
| 642 | |
| 643 | sock->state = SS_CONNECTED; |
| 644 | err = 0; |
| 645 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 646 | return err; |
| 647 | |
| 648 | sock_error: |
| 649 | err = sock_error(sk) ? : -ECONNABORTED; |
| 650 | sock->state = SS_UNCONNECTED; |
| 651 | if (sk->sk_prot->disconnect(sk, flags)) |
| 652 | sock->state = SS_DISCONNECTING; |
| 653 | goto out; |
| 654 | } |
Yuchung Cheng | cf60af0 | 2012-07-19 06:43:09 +0000 | [diff] [blame] | 655 | EXPORT_SYMBOL(__inet_stream_connect); |
| 656 | |
| 657 | int inet_stream_connect(struct socket *sock, struct sockaddr *uaddr, |
| 658 | int addr_len, int flags) |
| 659 | { |
| 660 | int err; |
| 661 | |
| 662 | lock_sock(sock->sk); |
| 663 | err = __inet_stream_connect(sock, uaddr, addr_len, flags); |
| 664 | release_sock(sock->sk); |
| 665 | return err; |
| 666 | } |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 667 | EXPORT_SYMBOL(inet_stream_connect); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 668 | |
| 669 | /* |
| 670 | * Accept a pending connection. The TCP layer now gives BSD semantics. |
| 671 | */ |
| 672 | |
| 673 | int inet_accept(struct socket *sock, struct socket *newsock, int flags) |
| 674 | { |
| 675 | struct sock *sk1 = sock->sk; |
| 676 | int err = -EINVAL; |
| 677 | struct sock *sk2 = sk1->sk_prot->accept(sk1, flags, &err); |
| 678 | |
| 679 | if (!sk2) |
| 680 | goto do_err; |
| 681 | |
| 682 | lock_sock(sk2); |
| 683 | |
Eric Dumazet | 1eddcea | 2011-06-17 03:45:15 +0000 | [diff] [blame] | 684 | sock_rps_record_flow(sk2); |
Ilpo Järvinen | 547b792 | 2008-07-25 21:43:18 -0700 | [diff] [blame] | 685 | WARN_ON(!((1 << sk2->sk_state) & |
Jerry Chu | 8336886 | 2012-08-31 12:29:12 +0000 | [diff] [blame] | 686 | (TCPF_ESTABLISHED | TCPF_SYN_RECV | |
| 687 | TCPF_CLOSE_WAIT | TCPF_CLOSE))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 688 | |
| 689 | sock_graft(sk2, newsock); |
| 690 | |
| 691 | newsock->state = SS_CONNECTED; |
| 692 | err = 0; |
| 693 | release_sock(sk2); |
| 694 | do_err: |
| 695 | return err; |
| 696 | } |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 697 | EXPORT_SYMBOL(inet_accept); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 698 | |
| 699 | |
| 700 | /* |
| 701 | * This does both peername and sockname. |
| 702 | */ |
| 703 | int inet_getname(struct socket *sock, struct sockaddr *uaddr, |
| 704 | int *uaddr_len, int peer) |
| 705 | { |
| 706 | struct sock *sk = sock->sk; |
| 707 | struct inet_sock *inet = inet_sk(sk); |
Cyrill Gorcunov | 38bfd8f | 2009-10-29 02:59:18 -0700 | [diff] [blame] | 708 | DECLARE_SOCKADDR(struct sockaddr_in *, sin, uaddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 709 | |
| 710 | sin->sin_family = AF_INET; |
| 711 | if (peer) { |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 712 | if (!inet->inet_dport || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 713 | (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) && |
| 714 | peer == 1)) |
| 715 | return -ENOTCONN; |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 716 | sin->sin_port = inet->inet_dport; |
| 717 | sin->sin_addr.s_addr = inet->inet_daddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 718 | } else { |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 719 | __be32 addr = inet->inet_rcv_saddr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 720 | if (!addr) |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 721 | addr = inet->inet_saddr; |
| 722 | sin->sin_port = inet->inet_sport; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 723 | sin->sin_addr.s_addr = addr; |
| 724 | } |
| 725 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); |
| 726 | *uaddr_len = sizeof(*sin); |
| 727 | return 0; |
| 728 | } |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 729 | EXPORT_SYMBOL(inet_getname); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 730 | |
| 731 | int inet_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, |
| 732 | size_t size) |
| 733 | { |
| 734 | struct sock *sk = sock->sk; |
| 735 | |
David S. Miller | c58dc01 | 2010-04-27 15:05:31 -0700 | [diff] [blame] | 736 | sock_rps_record_flow(sk); |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 737 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 738 | /* We may need to bind the socket. */ |
Changli Gao | 7ba4291 | 2010-07-10 20:41:55 +0000 | [diff] [blame] | 739 | if (!inet_sk(sk)->inet_num && !sk->sk_prot->no_autobind && |
| 740 | inet_autobind(sk)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 741 | return -EAGAIN; |
| 742 | |
| 743 | return sk->sk_prot->sendmsg(iocb, sk, msg, size); |
| 744 | } |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 745 | EXPORT_SYMBOL(inet_sendmsg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 746 | |
Changli Gao | 7ba4291 | 2010-07-10 20:41:55 +0000 | [diff] [blame] | 747 | ssize_t inet_sendpage(struct socket *sock, struct page *page, int offset, |
| 748 | size_t size, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 749 | { |
| 750 | struct sock *sk = sock->sk; |
| 751 | |
David S. Miller | c58dc01 | 2010-04-27 15:05:31 -0700 | [diff] [blame] | 752 | sock_rps_record_flow(sk); |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 753 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 754 | /* We may need to bind the socket. */ |
Changli Gao | 7ba4291 | 2010-07-10 20:41:55 +0000 | [diff] [blame] | 755 | if (!inet_sk(sk)->inet_num && !sk->sk_prot->no_autobind && |
| 756 | inet_autobind(sk)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 757 | return -EAGAIN; |
| 758 | |
| 759 | if (sk->sk_prot->sendpage) |
| 760 | return sk->sk_prot->sendpage(sk, page, offset, size, flags); |
| 761 | return sock_no_sendpage(sock, page, offset, size, flags); |
| 762 | } |
Changli Gao | 7ba4291 | 2010-07-10 20:41:55 +0000 | [diff] [blame] | 763 | EXPORT_SYMBOL(inet_sendpage); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 764 | |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 765 | int inet_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, |
| 766 | size_t size, int flags) |
| 767 | { |
| 768 | struct sock *sk = sock->sk; |
| 769 | int addr_len = 0; |
| 770 | int err; |
| 771 | |
David S. Miller | c58dc01 | 2010-04-27 15:05:31 -0700 | [diff] [blame] | 772 | sock_rps_record_flow(sk); |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 773 | |
| 774 | err = sk->sk_prot->recvmsg(iocb, sk, msg, size, flags & MSG_DONTWAIT, |
| 775 | flags & ~MSG_DONTWAIT, &addr_len); |
| 776 | if (err >= 0) |
| 777 | msg->msg_namelen = addr_len; |
| 778 | return err; |
| 779 | } |
| 780 | EXPORT_SYMBOL(inet_recvmsg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 781 | |
| 782 | int inet_shutdown(struct socket *sock, int how) |
| 783 | { |
| 784 | struct sock *sk = sock->sk; |
| 785 | int err = 0; |
| 786 | |
| 787 | /* This should really check to make sure |
| 788 | * the socket is a TCP socket. (WHY AC...) |
| 789 | */ |
| 790 | how++; /* maps 0->1 has the advantage of making bit 1 rcvs and |
| 791 | 1->2 bit 2 snds. |
| 792 | 2->3 */ |
| 793 | if ((how & ~SHUTDOWN_MASK) || !how) /* MAXINT->0 */ |
| 794 | return -EINVAL; |
| 795 | |
| 796 | lock_sock(sk); |
| 797 | if (sock->state == SS_CONNECTING) { |
| 798 | if ((1 << sk->sk_state) & |
| 799 | (TCPF_SYN_SENT | TCPF_SYN_RECV | TCPF_CLOSE)) |
| 800 | sock->state = SS_DISCONNECTING; |
| 801 | else |
| 802 | sock->state = SS_CONNECTED; |
| 803 | } |
| 804 | |
| 805 | switch (sk->sk_state) { |
| 806 | case TCP_CLOSE: |
| 807 | err = -ENOTCONN; |
| 808 | /* Hack to wake up other listeners, who can poll for |
| 809 | POLLHUP, even on eg. unconnected UDP sockets -- RR */ |
| 810 | default: |
| 811 | sk->sk_shutdown |= how; |
| 812 | if (sk->sk_prot->shutdown) |
| 813 | sk->sk_prot->shutdown(sk, how); |
| 814 | break; |
| 815 | |
| 816 | /* Remaining two branches are temporary solution for missing |
| 817 | * close() in multithreaded environment. It is _not_ a good idea, |
| 818 | * but we have no choice until close() is repaired at VFS level. |
| 819 | */ |
| 820 | case TCP_LISTEN: |
| 821 | if (!(how & RCV_SHUTDOWN)) |
| 822 | break; |
| 823 | /* Fall through */ |
| 824 | case TCP_SYN_SENT: |
| 825 | err = sk->sk_prot->disconnect(sk, O_NONBLOCK); |
| 826 | sock->state = err ? SS_DISCONNECTING : SS_UNCONNECTED; |
| 827 | break; |
| 828 | } |
| 829 | |
| 830 | /* Wake up anyone sleeping in poll. */ |
| 831 | sk->sk_state_change(sk); |
| 832 | release_sock(sk); |
| 833 | return err; |
| 834 | } |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 835 | EXPORT_SYMBOL(inet_shutdown); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 836 | |
| 837 | /* |
| 838 | * ioctl() calls you can issue on an INET socket. Most of these are |
| 839 | * device configuration and stuff and very rarely used. Some ioctls |
| 840 | * pass on to the socket itself. |
| 841 | * |
| 842 | * NOTE: I like the idea of a module for the config stuff. ie ifconfig |
| 843 | * loads the devconfigure module does its configuring and unloads it. |
| 844 | * There's a good 20K of config code hanging around the kernel. |
| 845 | */ |
| 846 | |
| 847 | int inet_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
| 848 | { |
| 849 | struct sock *sk = sock->sk; |
| 850 | int err = 0; |
YOSHIFUJI Hideaki | 3b1e0a6 | 2008-03-26 02:26:21 +0900 | [diff] [blame] | 851 | struct net *net = sock_net(sk); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 852 | |
| 853 | switch (cmd) { |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 854 | case SIOCGSTAMP: |
| 855 | err = sock_get_timestamp(sk, (struct timeval __user *)arg); |
| 856 | break; |
| 857 | case SIOCGSTAMPNS: |
| 858 | err = sock_get_timestampns(sk, (struct timespec __user *)arg); |
| 859 | break; |
| 860 | case SIOCADDRT: |
| 861 | case SIOCDELRT: |
| 862 | case SIOCRTMSG: |
| 863 | err = ip_rt_ioctl(net, cmd, (void __user *)arg); |
| 864 | break; |
| 865 | case SIOCDARP: |
| 866 | case SIOCGARP: |
| 867 | case SIOCSARP: |
| 868 | err = arp_ioctl(net, cmd, (void __user *)arg); |
| 869 | break; |
| 870 | case SIOCGIFADDR: |
| 871 | case SIOCSIFADDR: |
| 872 | case SIOCGIFBRDADDR: |
| 873 | case SIOCSIFBRDADDR: |
| 874 | case SIOCGIFNETMASK: |
| 875 | case SIOCSIFNETMASK: |
| 876 | case SIOCGIFDSTADDR: |
| 877 | case SIOCSIFDSTADDR: |
| 878 | case SIOCSIFPFLAGS: |
| 879 | case SIOCGIFPFLAGS: |
| 880 | case SIOCSIFFLAGS: |
| 881 | err = devinet_ioctl(net, cmd, (void __user *)arg); |
| 882 | break; |
| 883 | default: |
| 884 | if (sk->sk_prot->ioctl) |
| 885 | err = sk->sk_prot->ioctl(sk, cmd, arg); |
| 886 | else |
| 887 | err = -ENOIOCTLCMD; |
| 888 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 889 | } |
| 890 | return err; |
| 891 | } |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 892 | EXPORT_SYMBOL(inet_ioctl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 893 | |
Eric W. Biederman | 709b46e | 2011-01-29 16:15:56 +0000 | [diff] [blame] | 894 | #ifdef CONFIG_COMPAT |
Gerrit Renker | 686dc6b | 2011-10-15 09:26:56 +0000 | [diff] [blame] | 895 | static int inet_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
Eric W. Biederman | 709b46e | 2011-01-29 16:15:56 +0000 | [diff] [blame] | 896 | { |
| 897 | struct sock *sk = sock->sk; |
| 898 | int err = -ENOIOCTLCMD; |
| 899 | |
| 900 | if (sk->sk_prot->compat_ioctl) |
| 901 | err = sk->sk_prot->compat_ioctl(sk, cmd, arg); |
| 902 | |
| 903 | return err; |
| 904 | } |
| 905 | #endif |
| 906 | |
Eric Dumazet | 90ddc4f | 2005-12-22 12:49:22 -0800 | [diff] [blame] | 907 | const struct proto_ops inet_stream_ops = { |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 908 | .family = PF_INET, |
| 909 | .owner = THIS_MODULE, |
| 910 | .release = inet_release, |
| 911 | .bind = inet_bind, |
| 912 | .connect = inet_stream_connect, |
| 913 | .socketpair = sock_no_socketpair, |
| 914 | .accept = inet_accept, |
| 915 | .getname = inet_getname, |
| 916 | .poll = tcp_poll, |
| 917 | .ioctl = inet_ioctl, |
| 918 | .listen = inet_listen, |
| 919 | .shutdown = inet_shutdown, |
| 920 | .setsockopt = sock_common_setsockopt, |
| 921 | .getsockopt = sock_common_getsockopt, |
Changli Gao | 7ba4291 | 2010-07-10 20:41:55 +0000 | [diff] [blame] | 922 | .sendmsg = inet_sendmsg, |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 923 | .recvmsg = inet_recvmsg, |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 924 | .mmap = sock_no_mmap, |
Changli Gao | 7ba4291 | 2010-07-10 20:41:55 +0000 | [diff] [blame] | 925 | .sendpage = inet_sendpage, |
Jens Axboe | 9c55e01 | 2007-11-06 23:30:13 -0800 | [diff] [blame] | 926 | .splice_read = tcp_splice_read, |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 927 | #ifdef CONFIG_COMPAT |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 928 | .compat_setsockopt = compat_sock_common_setsockopt, |
| 929 | .compat_getsockopt = compat_sock_common_getsockopt, |
Eric W. Biederman | 709b46e | 2011-01-29 16:15:56 +0000 | [diff] [blame] | 930 | .compat_ioctl = inet_compat_ioctl, |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 931 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 932 | }; |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 933 | EXPORT_SYMBOL(inet_stream_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 934 | |
Eric Dumazet | 90ddc4f | 2005-12-22 12:49:22 -0800 | [diff] [blame] | 935 | const struct proto_ops inet_dgram_ops = { |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 936 | .family = PF_INET, |
| 937 | .owner = THIS_MODULE, |
| 938 | .release = inet_release, |
| 939 | .bind = inet_bind, |
| 940 | .connect = inet_dgram_connect, |
| 941 | .socketpair = sock_no_socketpair, |
| 942 | .accept = sock_no_accept, |
| 943 | .getname = inet_getname, |
| 944 | .poll = udp_poll, |
| 945 | .ioctl = inet_ioctl, |
| 946 | .listen = sock_no_listen, |
| 947 | .shutdown = inet_shutdown, |
| 948 | .setsockopt = sock_common_setsockopt, |
| 949 | .getsockopt = sock_common_getsockopt, |
| 950 | .sendmsg = inet_sendmsg, |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 951 | .recvmsg = inet_recvmsg, |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 952 | .mmap = sock_no_mmap, |
| 953 | .sendpage = inet_sendpage, |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 954 | #ifdef CONFIG_COMPAT |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 955 | .compat_setsockopt = compat_sock_common_setsockopt, |
| 956 | .compat_getsockopt = compat_sock_common_getsockopt, |
Eric W. Biederman | 709b46e | 2011-01-29 16:15:56 +0000 | [diff] [blame] | 957 | .compat_ioctl = inet_compat_ioctl, |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 958 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 959 | }; |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 960 | EXPORT_SYMBOL(inet_dgram_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 961 | |
| 962 | /* |
| 963 | * For SOCK_RAW sockets; should be the same as inet_dgram_ops but without |
| 964 | * udp_poll |
| 965 | */ |
Eric Dumazet | 90ddc4f | 2005-12-22 12:49:22 -0800 | [diff] [blame] | 966 | static const struct proto_ops inet_sockraw_ops = { |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 967 | .family = PF_INET, |
| 968 | .owner = THIS_MODULE, |
| 969 | .release = inet_release, |
| 970 | .bind = inet_bind, |
| 971 | .connect = inet_dgram_connect, |
| 972 | .socketpair = sock_no_socketpair, |
| 973 | .accept = sock_no_accept, |
| 974 | .getname = inet_getname, |
| 975 | .poll = datagram_poll, |
| 976 | .ioctl = inet_ioctl, |
| 977 | .listen = sock_no_listen, |
| 978 | .shutdown = inet_shutdown, |
| 979 | .setsockopt = sock_common_setsockopt, |
| 980 | .getsockopt = sock_common_getsockopt, |
| 981 | .sendmsg = inet_sendmsg, |
Tom Herbert | fec5e65 | 2010-04-16 16:01:27 -0700 | [diff] [blame] | 982 | .recvmsg = inet_recvmsg, |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 983 | .mmap = sock_no_mmap, |
| 984 | .sendpage = inet_sendpage, |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 985 | #ifdef CONFIG_COMPAT |
Arnaldo Carvalho de Melo | 543d9cf | 2006-03-20 22:48:35 -0800 | [diff] [blame] | 986 | .compat_setsockopt = compat_sock_common_setsockopt, |
| 987 | .compat_getsockopt = compat_sock_common_getsockopt, |
Eric W. Biederman | 709b46e | 2011-01-29 16:15:56 +0000 | [diff] [blame] | 988 | .compat_ioctl = inet_compat_ioctl, |
Dmitry Mishin | 3fdadf7 | 2006-03-20 22:45:21 -0800 | [diff] [blame] | 989 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 990 | }; |
| 991 | |
Stephen Hemminger | ec1b4cf | 2009-10-05 05:58:39 +0000 | [diff] [blame] | 992 | static const struct net_proto_family inet_family_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 993 | .family = PF_INET, |
| 994 | .create = inet_create, |
| 995 | .owner = THIS_MODULE, |
| 996 | }; |
| 997 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 998 | /* Upon startup we insert all the elements in inetsw_array[] into |
| 999 | * the linked list inetsw. |
| 1000 | */ |
| 1001 | static struct inet_protosw inetsw_array[] = |
| 1002 | { |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1003 | { |
| 1004 | .type = SOCK_STREAM, |
| 1005 | .protocol = IPPROTO_TCP, |
| 1006 | .prot = &tcp_prot, |
| 1007 | .ops = &inet_stream_ops, |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1008 | .no_check = 0, |
| 1009 | .flags = INET_PROTOSW_PERMANENT | |
Arnaldo Carvalho de Melo | d83d846 | 2005-12-13 23:26:10 -0800 | [diff] [blame] | 1010 | INET_PROTOSW_ICSK, |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1011 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1012 | |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1013 | { |
| 1014 | .type = SOCK_DGRAM, |
| 1015 | .protocol = IPPROTO_UDP, |
| 1016 | .prot = &udp_prot, |
| 1017 | .ops = &inet_dgram_ops, |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1018 | .no_check = UDP_CSUM_DEFAULT, |
| 1019 | .flags = INET_PROTOSW_PERMANENT, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1020 | }, |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1021 | |
Vasiliy Kulikov | c319b4d | 2011-05-13 10:01:00 +0000 | [diff] [blame] | 1022 | { |
| 1023 | .type = SOCK_DGRAM, |
| 1024 | .protocol = IPPROTO_ICMP, |
| 1025 | .prot = &ping_prot, |
| 1026 | .ops = &inet_dgram_ops, |
| 1027 | .no_check = UDP_CSUM_DEFAULT, |
| 1028 | .flags = INET_PROTOSW_REUSE, |
| 1029 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1030 | |
| 1031 | { |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1032 | .type = SOCK_RAW, |
| 1033 | .protocol = IPPROTO_IP, /* wild card */ |
| 1034 | .prot = &raw_prot, |
| 1035 | .ops = &inet_sockraw_ops, |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1036 | .no_check = UDP_CSUM_DEFAULT, |
| 1037 | .flags = INET_PROTOSW_REUSE, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1038 | } |
| 1039 | }; |
| 1040 | |
Denis Cheng | c40f6ff | 2007-09-16 16:39:25 -0700 | [diff] [blame] | 1041 | #define INETSW_ARRAY_LEN ARRAY_SIZE(inetsw_array) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1042 | |
| 1043 | void inet_register_protosw(struct inet_protosw *p) |
| 1044 | { |
| 1045 | struct list_head *lh; |
| 1046 | struct inet_protosw *answer; |
| 1047 | int protocol = p->protocol; |
| 1048 | struct list_head *last_perm; |
| 1049 | |
| 1050 | spin_lock_bh(&inetsw_lock); |
| 1051 | |
| 1052 | if (p->type >= SOCK_MAX) |
| 1053 | goto out_illegal; |
| 1054 | |
| 1055 | /* If we are trying to override a permanent protocol, bail. */ |
| 1056 | answer = NULL; |
| 1057 | last_perm = &inetsw[p->type]; |
| 1058 | list_for_each(lh, &inetsw[p->type]) { |
| 1059 | answer = list_entry(lh, struct inet_protosw, list); |
| 1060 | |
| 1061 | /* Check only the non-wild match. */ |
| 1062 | if (INET_PROTOSW_PERMANENT & answer->flags) { |
| 1063 | if (protocol == answer->protocol) |
| 1064 | break; |
| 1065 | last_perm = lh; |
| 1066 | } |
| 1067 | |
| 1068 | answer = NULL; |
| 1069 | } |
| 1070 | if (answer) |
| 1071 | goto out_permanent; |
| 1072 | |
| 1073 | /* Add the new entry after the last permanent entry if any, so that |
| 1074 | * the new entry does not override a permanent entry when matched with |
| 1075 | * a wild-card protocol. But it is allowed to override any existing |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1076 | * non-permanent entry. This means that when we remove this entry, the |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1077 | * system automatically returns to the old behavior. |
| 1078 | */ |
| 1079 | list_add_rcu(&p->list, last_perm); |
| 1080 | out: |
| 1081 | spin_unlock_bh(&inetsw_lock); |
| 1082 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1083 | return; |
| 1084 | |
| 1085 | out_permanent: |
Joe Perches | 058bd4d | 2012-03-11 18:36:11 +0000 | [diff] [blame] | 1086 | pr_err("Attempt to override permanent protocol %d\n", protocol); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1087 | goto out; |
| 1088 | |
| 1089 | out_illegal: |
Joe Perches | 058bd4d | 2012-03-11 18:36:11 +0000 | [diff] [blame] | 1090 | pr_err("Ignoring attempt to register invalid socket type %d\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1091 | p->type); |
| 1092 | goto out; |
| 1093 | } |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 1094 | EXPORT_SYMBOL(inet_register_protosw); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1095 | |
| 1096 | void inet_unregister_protosw(struct inet_protosw *p) |
| 1097 | { |
| 1098 | if (INET_PROTOSW_PERMANENT & p->flags) { |
Joe Perches | 058bd4d | 2012-03-11 18:36:11 +0000 | [diff] [blame] | 1099 | pr_err("Attempt to unregister permanent protocol %d\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1100 | p->protocol); |
| 1101 | } else { |
| 1102 | spin_lock_bh(&inetsw_lock); |
| 1103 | list_del_rcu(&p->list); |
| 1104 | spin_unlock_bh(&inetsw_lock); |
| 1105 | |
| 1106 | synchronize_net(); |
| 1107 | } |
| 1108 | } |
Eric Dumazet | 3d1427f | 2009-08-28 23:45:21 -0700 | [diff] [blame] | 1109 | EXPORT_SYMBOL(inet_unregister_protosw); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1110 | |
Arnaldo Carvalho de Melo | 32519f1 | 2005-08-09 19:50:02 -0700 | [diff] [blame] | 1111 | /* |
| 1112 | * Shall we try to damage output packets if routing dev changes? |
| 1113 | */ |
| 1114 | |
Brian Haley | ab32ea5 | 2006-09-22 14:15:41 -0700 | [diff] [blame] | 1115 | int sysctl_ip_dynaddr __read_mostly; |
Arnaldo Carvalho de Melo | 32519f1 | 2005-08-09 19:50:02 -0700 | [diff] [blame] | 1116 | |
| 1117 | static int inet_sk_reselect_saddr(struct sock *sk) |
| 1118 | { |
| 1119 | struct inet_sock *inet = inet_sk(sk); |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 1120 | __be32 old_saddr = inet->inet_saddr; |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 1121 | __be32 daddr = inet->inet_daddr; |
David S. Miller | 6e86913 | 2011-05-06 16:18:04 -0700 | [diff] [blame] | 1122 | struct flowi4 *fl4; |
David S. Miller | b23dd4f | 2011-03-02 14:31:35 -0800 | [diff] [blame] | 1123 | struct rtable *rt; |
| 1124 | __be32 new_saddr; |
Eric Dumazet | f6d8bd0 | 2011-04-21 09:45:37 +0000 | [diff] [blame] | 1125 | struct ip_options_rcu *inet_opt; |
Arnaldo Carvalho de Melo | 32519f1 | 2005-08-09 19:50:02 -0700 | [diff] [blame] | 1126 | |
Eric Dumazet | f6d8bd0 | 2011-04-21 09:45:37 +0000 | [diff] [blame] | 1127 | inet_opt = rcu_dereference_protected(inet->inet_opt, |
| 1128 | sock_owned_by_user(sk)); |
| 1129 | if (inet_opt && inet_opt->opt.srr) |
| 1130 | daddr = inet_opt->opt.faddr; |
Arnaldo Carvalho de Melo | 32519f1 | 2005-08-09 19:50:02 -0700 | [diff] [blame] | 1131 | |
| 1132 | /* Query new route. */ |
David S. Miller | 6e86913 | 2011-05-06 16:18:04 -0700 | [diff] [blame] | 1133 | fl4 = &inet->cork.fl.u.ip4; |
| 1134 | rt = ip_route_connect(fl4, daddr, 0, RT_CONN_FLAGS(sk), |
David S. Miller | b23dd4f | 2011-03-02 14:31:35 -0800 | [diff] [blame] | 1135 | sk->sk_bound_dev_if, sk->sk_protocol, |
| 1136 | inet->inet_sport, inet->inet_dport, sk, false); |
| 1137 | if (IS_ERR(rt)) |
| 1138 | return PTR_ERR(rt); |
Arnaldo Carvalho de Melo | 32519f1 | 2005-08-09 19:50:02 -0700 | [diff] [blame] | 1139 | |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1140 | sk_setup_caps(sk, &rt->dst); |
Arnaldo Carvalho de Melo | 32519f1 | 2005-08-09 19:50:02 -0700 | [diff] [blame] | 1141 | |
David S. Miller | 6e86913 | 2011-05-06 16:18:04 -0700 | [diff] [blame] | 1142 | new_saddr = fl4->saddr; |
Arnaldo Carvalho de Melo | 32519f1 | 2005-08-09 19:50:02 -0700 | [diff] [blame] | 1143 | |
| 1144 | if (new_saddr == old_saddr) |
| 1145 | return 0; |
| 1146 | |
| 1147 | if (sysctl_ip_dynaddr > 1) { |
Joe Perches | 058bd4d | 2012-03-11 18:36:11 +0000 | [diff] [blame] | 1148 | pr_info("%s(): shifting inet->saddr from %pI4 to %pI4\n", |
| 1149 | __func__, &old_saddr, &new_saddr); |
Arnaldo Carvalho de Melo | 32519f1 | 2005-08-09 19:50:02 -0700 | [diff] [blame] | 1150 | } |
| 1151 | |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 1152 | inet->inet_saddr = inet->inet_rcv_saddr = new_saddr; |
Arnaldo Carvalho de Melo | 32519f1 | 2005-08-09 19:50:02 -0700 | [diff] [blame] | 1153 | |
| 1154 | /* |
| 1155 | * XXX The only one ugly spot where we need to |
| 1156 | * XXX really change the sockets identity after |
| 1157 | * XXX it has entered the hashes. -DaveM |
| 1158 | * |
| 1159 | * Besides that, it does not check for connection |
| 1160 | * uniqueness. Wait for troubles. |
| 1161 | */ |
| 1162 | __sk_prot_rehash(sk); |
| 1163 | return 0; |
| 1164 | } |
| 1165 | |
| 1166 | int inet_sk_rebuild_header(struct sock *sk) |
| 1167 | { |
| 1168 | struct inet_sock *inet = inet_sk(sk); |
| 1169 | struct rtable *rt = (struct rtable *)__sk_dst_check(sk, 0); |
Al Viro | 3ca3c68 | 2006-09-27 18:28:07 -0700 | [diff] [blame] | 1170 | __be32 daddr; |
Eric Dumazet | f6d8bd0 | 2011-04-21 09:45:37 +0000 | [diff] [blame] | 1171 | struct ip_options_rcu *inet_opt; |
David S. Miller | 6e86913 | 2011-05-06 16:18:04 -0700 | [diff] [blame] | 1172 | struct flowi4 *fl4; |
Arnaldo Carvalho de Melo | 32519f1 | 2005-08-09 19:50:02 -0700 | [diff] [blame] | 1173 | int err; |
| 1174 | |
| 1175 | /* Route is OK, nothing to do. */ |
| 1176 | if (rt) |
| 1177 | return 0; |
| 1178 | |
| 1179 | /* Reroute. */ |
Eric Dumazet | f6d8bd0 | 2011-04-21 09:45:37 +0000 | [diff] [blame] | 1180 | rcu_read_lock(); |
| 1181 | inet_opt = rcu_dereference(inet->inet_opt); |
Eric Dumazet | c720c7e | 2009-10-15 06:30:45 +0000 | [diff] [blame] | 1182 | daddr = inet->inet_daddr; |
Eric Dumazet | f6d8bd0 | 2011-04-21 09:45:37 +0000 | [diff] [blame] | 1183 | if (inet_opt && inet_opt->opt.srr) |
| 1184 | daddr = inet_opt->opt.faddr; |
| 1185 | rcu_read_unlock(); |
David S. Miller | 6e86913 | 2011-05-06 16:18:04 -0700 | [diff] [blame] | 1186 | fl4 = &inet->cork.fl.u.ip4; |
| 1187 | rt = ip_route_output_ports(sock_net(sk), fl4, sk, daddr, inet->inet_saddr, |
David S. Miller | 78fbfd8 | 2011-03-12 00:00:52 -0500 | [diff] [blame] | 1188 | inet->inet_dport, inet->inet_sport, |
| 1189 | sk->sk_protocol, RT_CONN_FLAGS(sk), |
| 1190 | sk->sk_bound_dev_if); |
David S. Miller | b23dd4f | 2011-03-02 14:31:35 -0800 | [diff] [blame] | 1191 | if (!IS_ERR(rt)) { |
| 1192 | err = 0; |
Changli Gao | d8d1f30 | 2010-06-10 23:31:35 -0700 | [diff] [blame] | 1193 | sk_setup_caps(sk, &rt->dst); |
David S. Miller | b23dd4f | 2011-03-02 14:31:35 -0800 | [diff] [blame] | 1194 | } else { |
| 1195 | err = PTR_ERR(rt); |
| 1196 | |
Arnaldo Carvalho de Melo | 32519f1 | 2005-08-09 19:50:02 -0700 | [diff] [blame] | 1197 | /* Routing failed... */ |
| 1198 | sk->sk_route_caps = 0; |
| 1199 | /* |
| 1200 | * Other protocols have to map its equivalent state to TCP_SYN_SENT. |
| 1201 | * DCCP maps its DCCP_REQUESTING state to TCP_SYN_SENT. -acme |
| 1202 | */ |
| 1203 | if (!sysctl_ip_dynaddr || |
| 1204 | sk->sk_state != TCP_SYN_SENT || |
| 1205 | (sk->sk_userlocks & SOCK_BINDADDR_LOCK) || |
| 1206 | (err = inet_sk_reselect_saddr(sk)) != 0) |
| 1207 | sk->sk_err_soft = -err; |
| 1208 | } |
| 1209 | |
| 1210 | return err; |
| 1211 | } |
Arnaldo Carvalho de Melo | 32519f1 | 2005-08-09 19:50:02 -0700 | [diff] [blame] | 1212 | EXPORT_SYMBOL(inet_sk_rebuild_header); |
| 1213 | |
Herbert Xu | a430a43 | 2006-07-08 13:34:56 -0700 | [diff] [blame] | 1214 | static int inet_gso_send_check(struct sk_buff *skb) |
| 1215 | { |
Vlad Yasevich | bca49f8 | 2012-11-15 08:49:14 +0000 | [diff] [blame] | 1216 | const struct net_offload *ops; |
David S. Miller | f9242b6 | 2012-06-19 18:56:21 -0700 | [diff] [blame] | 1217 | const struct iphdr *iph; |
Herbert Xu | a430a43 | 2006-07-08 13:34:56 -0700 | [diff] [blame] | 1218 | int proto; |
| 1219 | int ihl; |
| 1220 | int err = -EINVAL; |
| 1221 | |
| 1222 | if (unlikely(!pskb_may_pull(skb, sizeof(*iph)))) |
| 1223 | goto out; |
| 1224 | |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 1225 | iph = ip_hdr(skb); |
Herbert Xu | a430a43 | 2006-07-08 13:34:56 -0700 | [diff] [blame] | 1226 | ihl = iph->ihl * 4; |
| 1227 | if (ihl < sizeof(*iph)) |
| 1228 | goto out; |
| 1229 | |
Eric Dumazet | 47d27aa | 2013-10-18 13:13:27 -0700 | [diff] [blame] | 1230 | proto = iph->protocol; |
| 1231 | |
| 1232 | /* Warning: after this point, iph might be no longer valid */ |
Herbert Xu | a430a43 | 2006-07-08 13:34:56 -0700 | [diff] [blame] | 1233 | if (unlikely(!pskb_may_pull(skb, ihl))) |
| 1234 | goto out; |
Arnaldo Carvalho de Melo | badff6d | 2007-03-13 13:06:52 -0300 | [diff] [blame] | 1235 | __skb_pull(skb, ihl); |
Eric Dumazet | 47d27aa | 2013-10-18 13:13:27 -0700 | [diff] [blame] | 1236 | |
Arnaldo Carvalho de Melo | badff6d | 2007-03-13 13:06:52 -0300 | [diff] [blame] | 1237 | skb_reset_transport_header(skb); |
Herbert Xu | a430a43 | 2006-07-08 13:34:56 -0700 | [diff] [blame] | 1238 | err = -EPROTONOSUPPORT; |
| 1239 | |
Vlad Yasevich | bca49f8 | 2012-11-15 08:49:14 +0000 | [diff] [blame] | 1240 | ops = rcu_dereference(inet_offloads[proto]); |
Vlad Yasevich | f191a1d | 2012-11-15 08:49:23 +0000 | [diff] [blame] | 1241 | if (likely(ops && ops->callbacks.gso_send_check)) |
| 1242 | err = ops->callbacks.gso_send_check(skb); |
Herbert Xu | a430a43 | 2006-07-08 13:34:56 -0700 | [diff] [blame] | 1243 | |
| 1244 | out: |
| 1245 | return err; |
| 1246 | } |
| 1247 | |
Michał Mirosław | c8f44af | 2011-11-15 15:29:55 +0000 | [diff] [blame] | 1248 | static struct sk_buff *inet_gso_segment(struct sk_buff *skb, |
Eric Dumazet | 3347c96 | 2013-10-19 11:42:56 -0700 | [diff] [blame] | 1249 | netdev_features_t features) |
Herbert Xu | f4c50d9 | 2006-06-22 03:02:40 -0700 | [diff] [blame] | 1250 | { |
| 1251 | struct sk_buff *segs = ERR_PTR(-EINVAL); |
Vlad Yasevich | bca49f8 | 2012-11-15 08:49:14 +0000 | [diff] [blame] | 1252 | const struct net_offload *ops; |
Eric Dumazet | 3347c96 | 2013-10-19 11:42:56 -0700 | [diff] [blame] | 1253 | unsigned int offset = 0; |
David S. Miller | f9242b6 | 2012-06-19 18:56:21 -0700 | [diff] [blame] | 1254 | struct iphdr *iph; |
Eric Dumazet | 3347c96 | 2013-10-19 11:42:56 -0700 | [diff] [blame] | 1255 | bool tunnel; |
Herbert Xu | f4c50d9 | 2006-06-22 03:02:40 -0700 | [diff] [blame] | 1256 | int proto; |
Eric Dumazet | 3347c96 | 2013-10-19 11:42:56 -0700 | [diff] [blame] | 1257 | int nhoff; |
Herbert Xu | f4c50d9 | 2006-06-22 03:02:40 -0700 | [diff] [blame] | 1258 | int ihl; |
| 1259 | int id; |
| 1260 | |
Herbert Xu | bbcf467 | 2006-07-03 19:38:35 -0700 | [diff] [blame] | 1261 | if (unlikely(skb_shinfo(skb)->gso_type & |
| 1262 | ~(SKB_GSO_TCPV4 | |
| 1263 | SKB_GSO_UDP | |
| 1264 | SKB_GSO_DODGY | |
| 1265 | SKB_GSO_TCP_ECN | |
Pravin B Shelar | 68c3316 | 2013-02-14 14:02:41 +0000 | [diff] [blame] | 1266 | SKB_GSO_GRE | |
Eric Dumazet | cb32f51 | 2013-10-19 11:42:57 -0700 | [diff] [blame] | 1267 | SKB_GSO_IPIP | |
Eric Dumazet | 61c1db7 | 2013-10-20 20:47:30 -0700 | [diff] [blame] | 1268 | SKB_GSO_SIT | |
Pravin B Shelar | 9b3eb5e | 2013-05-02 16:14:19 +0000 | [diff] [blame] | 1269 | SKB_GSO_TCPV6 | |
Pravin B Shelar | 7313626 | 2013-03-07 13:21:51 +0000 | [diff] [blame] | 1270 | SKB_GSO_UDP_TUNNEL | |
Simon Horman | 0d89d20 | 2013-05-23 21:02:52 +0000 | [diff] [blame] | 1271 | SKB_GSO_MPLS | |
Herbert Xu | bbcf467 | 2006-07-03 19:38:35 -0700 | [diff] [blame] | 1272 | 0))) |
| 1273 | goto out; |
| 1274 | |
Eric Dumazet | 3347c96 | 2013-10-19 11:42:56 -0700 | [diff] [blame] | 1275 | skb_reset_network_header(skb); |
| 1276 | nhoff = skb_network_header(skb) - skb_mac_header(skb); |
Herbert Xu | bbcf467 | 2006-07-03 19:38:35 -0700 | [diff] [blame] | 1277 | if (unlikely(!pskb_may_pull(skb, sizeof(*iph)))) |
Herbert Xu | f4c50d9 | 2006-06-22 03:02:40 -0700 | [diff] [blame] | 1278 | goto out; |
| 1279 | |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 1280 | iph = ip_hdr(skb); |
Herbert Xu | f4c50d9 | 2006-06-22 03:02:40 -0700 | [diff] [blame] | 1281 | ihl = iph->ihl * 4; |
| 1282 | if (ihl < sizeof(*iph)) |
| 1283 | goto out; |
| 1284 | |
Eric Dumazet | 47d27aa | 2013-10-18 13:13:27 -0700 | [diff] [blame] | 1285 | id = ntohs(iph->id); |
| 1286 | proto = iph->protocol; |
| 1287 | |
| 1288 | /* Warning: after this point, iph might be no longer valid */ |
Herbert Xu | bbcf467 | 2006-07-03 19:38:35 -0700 | [diff] [blame] | 1289 | if (unlikely(!pskb_may_pull(skb, ihl))) |
Herbert Xu | f4c50d9 | 2006-06-22 03:02:40 -0700 | [diff] [blame] | 1290 | goto out; |
Eric Dumazet | 47d27aa | 2013-10-18 13:13:27 -0700 | [diff] [blame] | 1291 | __skb_pull(skb, ihl); |
Herbert Xu | f4c50d9 | 2006-06-22 03:02:40 -0700 | [diff] [blame] | 1292 | |
Eric Dumazet | 3347c96 | 2013-10-19 11:42:56 -0700 | [diff] [blame] | 1293 | tunnel = SKB_GSO_CB(skb)->encap_level > 0; |
| 1294 | if (tunnel) |
| 1295 | features = skb->dev->hw_enc_features & netif_skb_features(skb); |
| 1296 | SKB_GSO_CB(skb)->encap_level += ihl; |
Pravin B Shelar | 7313626 | 2013-03-07 13:21:51 +0000 | [diff] [blame] | 1297 | |
Arnaldo Carvalho de Melo | badff6d | 2007-03-13 13:06:52 -0300 | [diff] [blame] | 1298 | skb_reset_transport_header(skb); |
Eric Dumazet | 47d27aa | 2013-10-18 13:13:27 -0700 | [diff] [blame] | 1299 | |
Herbert Xu | f4c50d9 | 2006-06-22 03:02:40 -0700 | [diff] [blame] | 1300 | segs = ERR_PTR(-EPROTONOSUPPORT); |
| 1301 | |
Vlad Yasevich | bca49f8 | 2012-11-15 08:49:14 +0000 | [diff] [blame] | 1302 | ops = rcu_dereference(inet_offloads[proto]); |
Vlad Yasevich | f191a1d | 2012-11-15 08:49:23 +0000 | [diff] [blame] | 1303 | if (likely(ops && ops->callbacks.gso_segment)) |
| 1304 | segs = ops->callbacks.gso_segment(skb, features); |
Herbert Xu | f4c50d9 | 2006-06-22 03:02:40 -0700 | [diff] [blame] | 1305 | |
YOSHIFUJI Hideaki / 吉藤英明 | 50c3a48 | 2013-01-22 06:32:49 +0000 | [diff] [blame] | 1306 | if (IS_ERR_OR_NULL(segs)) |
Herbert Xu | f4c50d9 | 2006-06-22 03:02:40 -0700 | [diff] [blame] | 1307 | goto out; |
| 1308 | |
| 1309 | skb = segs; |
| 1310 | do { |
Eric Dumazet | 3347c96 | 2013-10-19 11:42:56 -0700 | [diff] [blame] | 1311 | iph = (struct iphdr *)(skb_mac_header(skb) + nhoff); |
Pravin B Shelar | 7313626 | 2013-03-07 13:21:51 +0000 | [diff] [blame] | 1312 | if (!tunnel && proto == IPPROTO_UDP) { |
Sridhar Samudrala | d7ca4cc | 2009-07-09 08:09:47 +0000 | [diff] [blame] | 1313 | iph->id = htons(id); |
| 1314 | iph->frag_off = htons(offset >> 3); |
| 1315 | if (skb->next != NULL) |
| 1316 | iph->frag_off |= htons(IP_MF); |
Eric Dumazet | 3347c96 | 2013-10-19 11:42:56 -0700 | [diff] [blame] | 1317 | offset += skb->len - nhoff - ihl; |
Pravin B Shelar | 490ab08 | 2013-02-22 07:30:30 +0000 | [diff] [blame] | 1318 | } else { |
Pravin B Shelar | 25c7704 | 2013-03-24 17:36:29 +0000 | [diff] [blame] | 1319 | iph->id = htons(id++); |
Pravin B Shelar | 490ab08 | 2013-02-22 07:30:30 +0000 | [diff] [blame] | 1320 | } |
Eric Dumazet | 3347c96 | 2013-10-19 11:42:56 -0700 | [diff] [blame] | 1321 | iph->tot_len = htons(skb->len - nhoff); |
Eric Dumazet | 47d27aa | 2013-10-18 13:13:27 -0700 | [diff] [blame] | 1322 | ip_send_check(iph); |
Eric Dumazet | 3347c96 | 2013-10-19 11:42:56 -0700 | [diff] [blame] | 1323 | if (tunnel) { |
| 1324 | skb_reset_inner_headers(skb); |
| 1325 | skb->encapsulation = 1; |
| 1326 | } |
| 1327 | skb->network_header = (u8 *)iph - skb->head; |
Herbert Xu | f4c50d9 | 2006-06-22 03:02:40 -0700 | [diff] [blame] | 1328 | } while ((skb = skb->next)); |
| 1329 | |
| 1330 | out: |
| 1331 | return segs; |
| 1332 | } |
| 1333 | |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1334 | static struct sk_buff **inet_gro_receive(struct sk_buff **head, |
| 1335 | struct sk_buff *skb) |
| 1336 | { |
Vlad Yasevich | bca49f8 | 2012-11-15 08:49:14 +0000 | [diff] [blame] | 1337 | const struct net_offload *ops; |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1338 | struct sk_buff **pp = NULL; |
| 1339 | struct sk_buff *p; |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 1340 | const struct iphdr *iph; |
Herbert Xu | a5b1cf2 | 2009-05-26 18:50:28 +0000 | [diff] [blame] | 1341 | unsigned int hlen; |
| 1342 | unsigned int off; |
Herbert Xu | 1075f3f | 2009-05-26 18:50:29 +0000 | [diff] [blame] | 1343 | unsigned int id; |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1344 | int flush = 1; |
| 1345 | int proto; |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1346 | |
Herbert Xu | a5b1cf2 | 2009-05-26 18:50:28 +0000 | [diff] [blame] | 1347 | off = skb_gro_offset(skb); |
| 1348 | hlen = off + sizeof(*iph); |
| 1349 | iph = skb_gro_header_fast(skb, off); |
| 1350 | if (skb_gro_header_hard(skb, hlen)) { |
| 1351 | iph = skb_gro_header_slow(skb, hlen, off); |
| 1352 | if (unlikely(!iph)) |
| 1353 | goto out; |
| 1354 | } |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1355 | |
David S. Miller | f9242b6 | 2012-06-19 18:56:21 -0700 | [diff] [blame] | 1356 | proto = iph->protocol; |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1357 | |
| 1358 | rcu_read_lock(); |
Vlad Yasevich | bca49f8 | 2012-11-15 08:49:14 +0000 | [diff] [blame] | 1359 | ops = rcu_dereference(inet_offloads[proto]); |
Vlad Yasevich | f191a1d | 2012-11-15 08:49:23 +0000 | [diff] [blame] | 1360 | if (!ops || !ops->callbacks.gro_receive) |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1361 | goto out_unlock; |
| 1362 | |
Herbert Xu | a5ad24b | 2009-02-08 18:00:39 +0000 | [diff] [blame] | 1363 | if (*(u8 *)iph != 0x45) |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1364 | goto out_unlock; |
| 1365 | |
Eric Dumazet | a9e050f | 2012-08-05 22:34:50 +0000 | [diff] [blame] | 1366 | if (unlikely(ip_fast_csum((u8 *)iph, 5))) |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1367 | goto out_unlock; |
| 1368 | |
Eric Dumazet | 0eae88f | 2010-04-20 19:06:52 -0700 | [diff] [blame] | 1369 | id = ntohl(*(__be32 *)&iph->id); |
Eric Dumazet | db8caf3 | 2013-05-31 11:18:10 +0000 | [diff] [blame] | 1370 | flush = (u16)((ntohl(*(__be32 *)iph) ^ skb_gro_len(skb)) | (id & ~IP_DF)); |
Herbert Xu | 1075f3f | 2009-05-26 18:50:29 +0000 | [diff] [blame] | 1371 | id >>= 16; |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1372 | |
| 1373 | for (p = *head; p; p = p->next) { |
| 1374 | struct iphdr *iph2; |
| 1375 | |
| 1376 | if (!NAPI_GRO_CB(p)->same_flow) |
| 1377 | continue; |
| 1378 | |
| 1379 | iph2 = ip_hdr(p); |
| 1380 | |
Herbert Xu | a5ad24b | 2009-02-08 18:00:39 +0000 | [diff] [blame] | 1381 | if ((iph->protocol ^ iph2->protocol) | |
Eric Dumazet | 0eae88f | 2010-04-20 19:06:52 -0700 | [diff] [blame] | 1382 | ((__force u32)iph->saddr ^ (__force u32)iph2->saddr) | |
| 1383 | ((__force u32)iph->daddr ^ (__force u32)iph2->daddr)) { |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1384 | NAPI_GRO_CB(p)->same_flow = 0; |
| 1385 | continue; |
| 1386 | } |
| 1387 | |
| 1388 | /* All fields must match except length and checksum. */ |
| 1389 | NAPI_GRO_CB(p)->flush |= |
Herbert Xu | a5ad24b | 2009-02-08 18:00:39 +0000 | [diff] [blame] | 1390 | (iph->ttl ^ iph2->ttl) | |
Eric Dumazet | a9e050f | 2012-08-05 22:34:50 +0000 | [diff] [blame] | 1391 | (iph->tos ^ iph2->tos) | |
Eric Dumazet | 5b9b626 | 2013-06-12 14:23:15 -0700 | [diff] [blame] | 1392 | (__force int)((iph->frag_off ^ iph2->frag_off) & htons(IP_DF)) | |
Herbert Xu | a5ad24b | 2009-02-08 18:00:39 +0000 | [diff] [blame] | 1393 | ((u16)(ntohs(iph2->id) + NAPI_GRO_CB(p)->count) ^ id); |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1394 | |
| 1395 | NAPI_GRO_CB(p)->flush |= flush; |
| 1396 | } |
| 1397 | |
| 1398 | NAPI_GRO_CB(skb)->flush |= flush; |
Herbert Xu | 8691173 | 2009-01-29 14:19:50 +0000 | [diff] [blame] | 1399 | skb_gro_pull(skb, sizeof(*iph)); |
| 1400 | skb_set_transport_header(skb, skb_gro_offset(skb)); |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1401 | |
Vlad Yasevich | f191a1d | 2012-11-15 08:49:23 +0000 | [diff] [blame] | 1402 | pp = ops->callbacks.gro_receive(head, skb); |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1403 | |
| 1404 | out_unlock: |
| 1405 | rcu_read_unlock(); |
| 1406 | |
| 1407 | out: |
| 1408 | NAPI_GRO_CB(skb)->flush |= flush; |
| 1409 | |
| 1410 | return pp; |
| 1411 | } |
| 1412 | |
| 1413 | static int inet_gro_complete(struct sk_buff *skb) |
| 1414 | { |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1415 | __be16 newlen = htons(skb->len - skb_network_offset(skb)); |
David S. Miller | f9242b6 | 2012-06-19 18:56:21 -0700 | [diff] [blame] | 1416 | struct iphdr *iph = ip_hdr(skb); |
Vlad Yasevich | bca49f8 | 2012-11-15 08:49:14 +0000 | [diff] [blame] | 1417 | const struct net_offload *ops; |
David S. Miller | f9242b6 | 2012-06-19 18:56:21 -0700 | [diff] [blame] | 1418 | int proto = iph->protocol; |
| 1419 | int err = -ENOSYS; |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1420 | |
| 1421 | csum_replace2(&iph->check, iph->tot_len, newlen); |
| 1422 | iph->tot_len = newlen; |
| 1423 | |
| 1424 | rcu_read_lock(); |
Vlad Yasevich | bca49f8 | 2012-11-15 08:49:14 +0000 | [diff] [blame] | 1425 | ops = rcu_dereference(inet_offloads[proto]); |
Vlad Yasevich | f191a1d | 2012-11-15 08:49:23 +0000 | [diff] [blame] | 1426 | if (WARN_ON(!ops || !ops->callbacks.gro_complete)) |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1427 | goto out_unlock; |
| 1428 | |
Vlad Yasevich | f191a1d | 2012-11-15 08:49:23 +0000 | [diff] [blame] | 1429 | err = ops->callbacks.gro_complete(skb); |
Herbert Xu | 73cc19f | 2008-12-15 23:41:09 -0800 | [diff] [blame] | 1430 | |
| 1431 | out_unlock: |
| 1432 | rcu_read_unlock(); |
| 1433 | |
| 1434 | return err; |
| 1435 | } |
| 1436 | |
Denis V. Lunev | eee4fe4 | 2008-04-03 14:27:58 -0700 | [diff] [blame] | 1437 | int inet_ctl_sock_create(struct sock **sk, unsigned short family, |
Denis V. Lunev | 5677242 | 2008-04-03 14:28:30 -0700 | [diff] [blame] | 1438 | unsigned short type, unsigned char protocol, |
| 1439 | struct net *net) |
Denis V. Lunev | 3d58b5f | 2008-04-03 14:22:32 -0700 | [diff] [blame] | 1440 | { |
Denis V. Lunev | eee4fe4 | 2008-04-03 14:27:58 -0700 | [diff] [blame] | 1441 | struct socket *sock; |
| 1442 | int rc = sock_create_kern(family, type, protocol, &sock); |
Denis V. Lunev | 3d58b5f | 2008-04-03 14:22:32 -0700 | [diff] [blame] | 1443 | |
| 1444 | if (rc == 0) { |
Denis V. Lunev | eee4fe4 | 2008-04-03 14:27:58 -0700 | [diff] [blame] | 1445 | *sk = sock->sk; |
| 1446 | (*sk)->sk_allocation = GFP_ATOMIC; |
Denis V. Lunev | 3d58b5f | 2008-04-03 14:22:32 -0700 | [diff] [blame] | 1447 | /* |
| 1448 | * Unhash it so that IP input processing does not even see it, |
| 1449 | * we do not wish this socket to see incoming packets. |
| 1450 | */ |
Denis V. Lunev | eee4fe4 | 2008-04-03 14:27:58 -0700 | [diff] [blame] | 1451 | (*sk)->sk_prot->unhash(*sk); |
Denis V. Lunev | 5677242 | 2008-04-03 14:28:30 -0700 | [diff] [blame] | 1452 | |
| 1453 | sk_change_net(*sk, net); |
Denis V. Lunev | 3d58b5f | 2008-04-03 14:22:32 -0700 | [diff] [blame] | 1454 | } |
| 1455 | return rc; |
| 1456 | } |
Denis V. Lunev | 3d58b5f | 2008-04-03 14:22:32 -0700 | [diff] [blame] | 1457 | EXPORT_SYMBOL_GPL(inet_ctl_sock_create); |
| 1458 | |
Tejun Heo | 7d720c3 | 2010-02-16 15:20:26 +0000 | [diff] [blame] | 1459 | unsigned long snmp_fold_field(void __percpu *mib[], int offt) |
Herbert Xu | 5e0f043 | 2007-04-24 21:53:35 -0700 | [diff] [blame] | 1460 | { |
| 1461 | unsigned long res = 0; |
Eric Dumazet | 8f0ea0f | 2011-06-10 19:45:51 +0000 | [diff] [blame] | 1462 | int i, j; |
Herbert Xu | 5e0f043 | 2007-04-24 21:53:35 -0700 | [diff] [blame] | 1463 | |
| 1464 | for_each_possible_cpu(i) { |
Eric Dumazet | 8f0ea0f | 2011-06-10 19:45:51 +0000 | [diff] [blame] | 1465 | for (j = 0; j < SNMP_ARRAY_SZ; j++) |
| 1466 | res += *(((unsigned long *) per_cpu_ptr(mib[j], i)) + offt); |
Herbert Xu | 5e0f043 | 2007-04-24 21:53:35 -0700 | [diff] [blame] | 1467 | } |
| 1468 | return res; |
| 1469 | } |
| 1470 | EXPORT_SYMBOL_GPL(snmp_fold_field); |
| 1471 | |
Eric Dumazet | 4ce3c18 | 2010-06-30 13:31:19 -0700 | [diff] [blame] | 1472 | #if BITS_PER_LONG==32 |
| 1473 | |
| 1474 | u64 snmp_fold_field64(void __percpu *mib[], int offt, size_t syncp_offset) |
| 1475 | { |
| 1476 | u64 res = 0; |
| 1477 | int cpu; |
| 1478 | |
| 1479 | for_each_possible_cpu(cpu) { |
Eric Dumazet | 8f0ea0f | 2011-06-10 19:45:51 +0000 | [diff] [blame] | 1480 | void *bhptr; |
Eric Dumazet | 4ce3c18 | 2010-06-30 13:31:19 -0700 | [diff] [blame] | 1481 | struct u64_stats_sync *syncp; |
Eric Dumazet | 8f0ea0f | 2011-06-10 19:45:51 +0000 | [diff] [blame] | 1482 | u64 v; |
Eric Dumazet | 4ce3c18 | 2010-06-30 13:31:19 -0700 | [diff] [blame] | 1483 | unsigned int start; |
| 1484 | |
Eric Dumazet | 8f0ea0f | 2011-06-10 19:45:51 +0000 | [diff] [blame] | 1485 | bhptr = per_cpu_ptr(mib[0], cpu); |
Eric Dumazet | 4ce3c18 | 2010-06-30 13:31:19 -0700 | [diff] [blame] | 1486 | syncp = (struct u64_stats_sync *)(bhptr + syncp_offset); |
| 1487 | do { |
| 1488 | start = u64_stats_fetch_begin_bh(syncp); |
Eric Dumazet | 8f0ea0f | 2011-06-10 19:45:51 +0000 | [diff] [blame] | 1489 | v = *(((u64 *) bhptr) + offt); |
Eric Dumazet | 4ce3c18 | 2010-06-30 13:31:19 -0700 | [diff] [blame] | 1490 | } while (u64_stats_fetch_retry_bh(syncp, start)); |
| 1491 | |
Eric Dumazet | 8f0ea0f | 2011-06-10 19:45:51 +0000 | [diff] [blame] | 1492 | res += v; |
Eric Dumazet | 4ce3c18 | 2010-06-30 13:31:19 -0700 | [diff] [blame] | 1493 | } |
| 1494 | return res; |
| 1495 | } |
| 1496 | EXPORT_SYMBOL_GPL(snmp_fold_field64); |
| 1497 | #endif |
| 1498 | |
Eric Dumazet | 1823e4c8 | 2010-06-22 20:58:41 +0000 | [diff] [blame] | 1499 | int snmp_mib_init(void __percpu *ptr[2], size_t mibsize, size_t align) |
Herbert Xu | 5e0f043 | 2007-04-24 21:53:35 -0700 | [diff] [blame] | 1500 | { |
| 1501 | BUG_ON(ptr == NULL); |
Eric Dumazet | 1823e4c8 | 2010-06-22 20:58:41 +0000 | [diff] [blame] | 1502 | ptr[0] = __alloc_percpu(mibsize, align); |
Herbert Xu | 5e0f043 | 2007-04-24 21:53:35 -0700 | [diff] [blame] | 1503 | if (!ptr[0]) |
Eric Dumazet | 8f0ea0f | 2011-06-10 19:45:51 +0000 | [diff] [blame] | 1504 | return -ENOMEM; |
| 1505 | #if SNMP_ARRAY_SZ == 2 |
Eric Dumazet | 1823e4c8 | 2010-06-22 20:58:41 +0000 | [diff] [blame] | 1506 | ptr[1] = __alloc_percpu(mibsize, align); |
Eric Dumazet | 8f0ea0f | 2011-06-10 19:45:51 +0000 | [diff] [blame] | 1507 | if (!ptr[1]) { |
| 1508 | free_percpu(ptr[0]); |
| 1509 | ptr[0] = NULL; |
| 1510 | return -ENOMEM; |
| 1511 | } |
| 1512 | #endif |
Herbert Xu | 5e0f043 | 2007-04-24 21:53:35 -0700 | [diff] [blame] | 1513 | return 0; |
Herbert Xu | 5e0f043 | 2007-04-24 21:53:35 -0700 | [diff] [blame] | 1514 | } |
| 1515 | EXPORT_SYMBOL_GPL(snmp_mib_init); |
| 1516 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1517 | #ifdef CONFIG_IP_MULTICAST |
Alexey Dobriyan | 3261309 | 2009-09-14 12:21:47 +0000 | [diff] [blame] | 1518 | static const struct net_protocol igmp_protocol = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1519 | .handler = igmp_rcv, |
Alexey Dobriyan | b4ee07d | 2008-12-25 16:42:23 -0800 | [diff] [blame] | 1520 | .netns_ok = 1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1521 | }; |
| 1522 | #endif |
| 1523 | |
Alexey Dobriyan | 3261309 | 2009-09-14 12:21:47 +0000 | [diff] [blame] | 1524 | static const struct net_protocol tcp_protocol = { |
David S. Miller | 41063e9 | 2012-06-19 21:22:05 -0700 | [diff] [blame] | 1525 | .early_demux = tcp_v4_early_demux, |
| 1526 | .handler = tcp_v4_rcv, |
| 1527 | .err_handler = tcp_v4_err, |
David S. Miller | 41063e9 | 2012-06-19 21:22:05 -0700 | [diff] [blame] | 1528 | .no_policy = 1, |
| 1529 | .netns_ok = 1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1530 | }; |
| 1531 | |
Alexey Dobriyan | 3261309 | 2009-09-14 12:21:47 +0000 | [diff] [blame] | 1532 | static const struct net_protocol udp_protocol = { |
Shawn Bohrer | 421b388 | 2013-10-07 11:01:39 -0500 | [diff] [blame] | 1533 | .early_demux = udp_v4_early_demux, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1534 | .handler = udp_rcv, |
| 1535 | .err_handler = udp_err, |
| 1536 | .no_policy = 1, |
Denis V. Lunev | 92f1fec | 2008-03-24 15:34:06 -0700 | [diff] [blame] | 1537 | .netns_ok = 1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1538 | }; |
| 1539 | |
Alexey Dobriyan | 3261309 | 2009-09-14 12:21:47 +0000 | [diff] [blame] | 1540 | static const struct net_protocol icmp_protocol = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1541 | .handler = icmp_rcv, |
Li Wei | 5b05204 | 2013-02-21 22:18:44 +0000 | [diff] [blame] | 1542 | .err_handler = icmp_err, |
Herbert Xu | 8b7817f | 2007-12-12 10:44:43 -0800 | [diff] [blame] | 1543 | .no_policy = 1, |
Denis V. Lunev | 92f1fec | 2008-03-24 15:34:06 -0700 | [diff] [blame] | 1544 | .netns_ok = 1, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1545 | }; |
| 1546 | |
Pavel Emelyanov | 9b4661b | 2008-07-18 04:01:44 -0700 | [diff] [blame] | 1547 | static __net_init int ipv4_mib_init_net(struct net *net) |
| 1548 | { |
Tejun Heo | 7d720c3 | 2010-02-16 15:20:26 +0000 | [diff] [blame] | 1549 | if (snmp_mib_init((void __percpu **)net->mib.tcp_statistics, |
Eric Dumazet | 1823e4c8 | 2010-06-22 20:58:41 +0000 | [diff] [blame] | 1550 | sizeof(struct tcp_mib), |
| 1551 | __alignof__(struct tcp_mib)) < 0) |
Pavel Emelyanov | 57ef42d | 2008-07-18 04:02:08 -0700 | [diff] [blame] | 1552 | goto err_tcp_mib; |
Tejun Heo | 7d720c3 | 2010-02-16 15:20:26 +0000 | [diff] [blame] | 1553 | if (snmp_mib_init((void __percpu **)net->mib.ip_statistics, |
Eric Dumazet | 1823e4c8 | 2010-06-22 20:58:41 +0000 | [diff] [blame] | 1554 | sizeof(struct ipstats_mib), |
| 1555 | __alignof__(struct ipstats_mib)) < 0) |
Pavel Emelyanov | a20f579 | 2008-07-18 04:02:42 -0700 | [diff] [blame] | 1556 | goto err_ip_mib; |
Tejun Heo | 7d720c3 | 2010-02-16 15:20:26 +0000 | [diff] [blame] | 1557 | if (snmp_mib_init((void __percpu **)net->mib.net_statistics, |
Eric Dumazet | 1823e4c8 | 2010-06-22 20:58:41 +0000 | [diff] [blame] | 1558 | sizeof(struct linux_mib), |
| 1559 | __alignof__(struct linux_mib)) < 0) |
Pavel Emelyanov | 61a7e26 | 2008-07-18 04:03:08 -0700 | [diff] [blame] | 1560 | goto err_net_mib; |
Tejun Heo | 7d720c3 | 2010-02-16 15:20:26 +0000 | [diff] [blame] | 1561 | if (snmp_mib_init((void __percpu **)net->mib.udp_statistics, |
Eric Dumazet | 1823e4c8 | 2010-06-22 20:58:41 +0000 | [diff] [blame] | 1562 | sizeof(struct udp_mib), |
| 1563 | __alignof__(struct udp_mib)) < 0) |
Pavel Emelyanov | 2f275f9 | 2008-07-18 04:03:27 -0700 | [diff] [blame] | 1564 | goto err_udp_mib; |
Tejun Heo | 7d720c3 | 2010-02-16 15:20:26 +0000 | [diff] [blame] | 1565 | if (snmp_mib_init((void __percpu **)net->mib.udplite_statistics, |
Eric Dumazet | 1823e4c8 | 2010-06-22 20:58:41 +0000 | [diff] [blame] | 1566 | sizeof(struct udp_mib), |
| 1567 | __alignof__(struct udp_mib)) < 0) |
Pavel Emelyanov | 386019d | 2008-07-18 04:03:45 -0700 | [diff] [blame] | 1568 | goto err_udplite_mib; |
Tejun Heo | 7d720c3 | 2010-02-16 15:20:26 +0000 | [diff] [blame] | 1569 | if (snmp_mib_init((void __percpu **)net->mib.icmp_statistics, |
Eric Dumazet | 1823e4c8 | 2010-06-22 20:58:41 +0000 | [diff] [blame] | 1570 | sizeof(struct icmp_mib), |
| 1571 | __alignof__(struct icmp_mib)) < 0) |
Pavel Emelyanov | b60538a | 2008-07-18 04:04:02 -0700 | [diff] [blame] | 1572 | goto err_icmp_mib; |
Eric Dumazet | acb32ba | 2011-11-08 13:04:43 +0000 | [diff] [blame] | 1573 | net->mib.icmpmsg_statistics = kzalloc(sizeof(struct icmpmsg_mib), |
| 1574 | GFP_KERNEL); |
| 1575 | if (!net->mib.icmpmsg_statistics) |
Pavel Emelyanov | 923c658 | 2008-07-18 04:04:22 -0700 | [diff] [blame] | 1576 | goto err_icmpmsg_mib; |
Pavel Emelyanov | 57ef42d | 2008-07-18 04:02:08 -0700 | [diff] [blame] | 1577 | |
| 1578 | tcp_mib_init(net); |
Pavel Emelyanov | 9b4661b | 2008-07-18 04:01:44 -0700 | [diff] [blame] | 1579 | return 0; |
Pavel Emelyanov | 57ef42d | 2008-07-18 04:02:08 -0700 | [diff] [blame] | 1580 | |
Pavel Emelyanov | 923c658 | 2008-07-18 04:04:22 -0700 | [diff] [blame] | 1581 | err_icmpmsg_mib: |
Tejun Heo | 7d720c3 | 2010-02-16 15:20:26 +0000 | [diff] [blame] | 1582 | snmp_mib_free((void __percpu **)net->mib.icmp_statistics); |
Pavel Emelyanov | b60538a | 2008-07-18 04:04:02 -0700 | [diff] [blame] | 1583 | err_icmp_mib: |
Tejun Heo | 7d720c3 | 2010-02-16 15:20:26 +0000 | [diff] [blame] | 1584 | snmp_mib_free((void __percpu **)net->mib.udplite_statistics); |
Pavel Emelyanov | 386019d | 2008-07-18 04:03:45 -0700 | [diff] [blame] | 1585 | err_udplite_mib: |
Tejun Heo | 7d720c3 | 2010-02-16 15:20:26 +0000 | [diff] [blame] | 1586 | snmp_mib_free((void __percpu **)net->mib.udp_statistics); |
Pavel Emelyanov | 2f275f9 | 2008-07-18 04:03:27 -0700 | [diff] [blame] | 1587 | err_udp_mib: |
Tejun Heo | 7d720c3 | 2010-02-16 15:20:26 +0000 | [diff] [blame] | 1588 | snmp_mib_free((void __percpu **)net->mib.net_statistics); |
Pavel Emelyanov | 61a7e26 | 2008-07-18 04:03:08 -0700 | [diff] [blame] | 1589 | err_net_mib: |
Tejun Heo | 7d720c3 | 2010-02-16 15:20:26 +0000 | [diff] [blame] | 1590 | snmp_mib_free((void __percpu **)net->mib.ip_statistics); |
Pavel Emelyanov | a20f579 | 2008-07-18 04:02:42 -0700 | [diff] [blame] | 1591 | err_ip_mib: |
Tejun Heo | 7d720c3 | 2010-02-16 15:20:26 +0000 | [diff] [blame] | 1592 | snmp_mib_free((void __percpu **)net->mib.tcp_statistics); |
Pavel Emelyanov | 57ef42d | 2008-07-18 04:02:08 -0700 | [diff] [blame] | 1593 | err_tcp_mib: |
| 1594 | return -ENOMEM; |
Pavel Emelyanov | 9b4661b | 2008-07-18 04:01:44 -0700 | [diff] [blame] | 1595 | } |
| 1596 | |
| 1597 | static __net_exit void ipv4_mib_exit_net(struct net *net) |
| 1598 | { |
Eric Dumazet | acb32ba | 2011-11-08 13:04:43 +0000 | [diff] [blame] | 1599 | kfree(net->mib.icmpmsg_statistics); |
Tejun Heo | 7d720c3 | 2010-02-16 15:20:26 +0000 | [diff] [blame] | 1600 | snmp_mib_free((void __percpu **)net->mib.icmp_statistics); |
| 1601 | snmp_mib_free((void __percpu **)net->mib.udplite_statistics); |
| 1602 | snmp_mib_free((void __percpu **)net->mib.udp_statistics); |
| 1603 | snmp_mib_free((void __percpu **)net->mib.net_statistics); |
| 1604 | snmp_mib_free((void __percpu **)net->mib.ip_statistics); |
| 1605 | snmp_mib_free((void __percpu **)net->mib.tcp_statistics); |
Pavel Emelyanov | 9b4661b | 2008-07-18 04:01:44 -0700 | [diff] [blame] | 1606 | } |
| 1607 | |
| 1608 | static __net_initdata struct pernet_operations ipv4_mib_ops = { |
| 1609 | .init = ipv4_mib_init_net, |
| 1610 | .exit = ipv4_mib_exit_net, |
| 1611 | }; |
| 1612 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1613 | static int __init init_ipv4_mibs(void) |
| 1614 | { |
Pavel Emelyanov | d89cbbb | 2008-07-18 04:04:51 -0700 | [diff] [blame] | 1615 | return register_pernet_subsys(&ipv4_mib_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1616 | } |
| 1617 | |
| 1618 | static int ipv4_proc_init(void); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1619 | |
Herbert Xu | 30e224d | 2005-07-05 14:40:10 -0700 | [diff] [blame] | 1620 | /* |
| 1621 | * IP protocol layer initialiser |
| 1622 | */ |
| 1623 | |
Vlad Yasevich | 22061d8 | 2012-11-15 08:49:11 +0000 | [diff] [blame] | 1624 | static struct packet_offload ip_packet_offload __read_mostly = { |
| 1625 | .type = cpu_to_be16(ETH_P_IP), |
Vlad Yasevich | f191a1d | 2012-11-15 08:49:23 +0000 | [diff] [blame] | 1626 | .callbacks = { |
| 1627 | .gso_send_check = inet_gso_send_check, |
| 1628 | .gso_segment = inet_gso_segment, |
| 1629 | .gro_receive = inet_gro_receive, |
| 1630 | .gro_complete = inet_gro_complete, |
| 1631 | }, |
Herbert Xu | 30e224d | 2005-07-05 14:40:10 -0700 | [diff] [blame] | 1632 | }; |
| 1633 | |
Eric Dumazet | cb32f51 | 2013-10-19 11:42:57 -0700 | [diff] [blame] | 1634 | static const struct net_offload ipip_offload = { |
| 1635 | .callbacks = { |
| 1636 | .gso_send_check = inet_gso_send_check, |
| 1637 | .gso_segment = inet_gso_segment, |
| 1638 | }, |
| 1639 | }; |
| 1640 | |
Vlad Yasevich | 808a8f8 | 2012-11-15 08:49:21 +0000 | [diff] [blame] | 1641 | static int __init ipv4_offload_init(void) |
| 1642 | { |
| 1643 | /* |
| 1644 | * Add offloads |
| 1645 | */ |
Daniel Borkmann | da5bab0 | 2013-06-08 12:56:03 +0200 | [diff] [blame] | 1646 | if (udpv4_offload_init() < 0) |
Vlad Yasevich | 808a8f8 | 2012-11-15 08:49:21 +0000 | [diff] [blame] | 1647 | pr_crit("%s: Cannot add UDP protocol offload\n", __func__); |
Daniel Borkmann | 28850dc | 2013-06-07 05:11:46 +0000 | [diff] [blame] | 1648 | if (tcpv4_offload_init() < 0) |
| 1649 | pr_crit("%s: Cannot add TCP protocol offload\n", __func__); |
Vlad Yasevich | 808a8f8 | 2012-11-15 08:49:21 +0000 | [diff] [blame] | 1650 | |
| 1651 | dev_add_offload(&ip_packet_offload); |
Eric Dumazet | cb32f51 | 2013-10-19 11:42:57 -0700 | [diff] [blame] | 1652 | inet_add_offload(&ipip_offload, IPPROTO_IPIP); |
Vlad Yasevich | 808a8f8 | 2012-11-15 08:49:21 +0000 | [diff] [blame] | 1653 | return 0; |
| 1654 | } |
| 1655 | |
| 1656 | fs_initcall(ipv4_offload_init); |
| 1657 | |
| 1658 | static struct packet_type ip_packet_type __read_mostly = { |
| 1659 | .type = cpu_to_be16(ETH_P_IP), |
| 1660 | .func = ip_rcv, |
| 1661 | }; |
| 1662 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1663 | static int __init inet_init(void) |
| 1664 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1665 | struct inet_protosw *q; |
| 1666 | struct list_head *r; |
| 1667 | int rc = -EINVAL; |
| 1668 | |
YOSHIFUJI Hideaki / 吉藤英明 | 95c7e0e | 2013-01-09 07:19:37 +0000 | [diff] [blame] | 1669 | BUILD_BUG_ON(sizeof(struct inet_skb_parm) > FIELD_SIZEOF(struct sk_buff, cb)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1670 | |
Amerigo Wang | e3826f1 | 2010-05-05 00:27:06 +0000 | [diff] [blame] | 1671 | sysctl_local_reserved_ports = kzalloc(65536 / 8, GFP_KERNEL); |
| 1672 | if (!sysctl_local_reserved_ports) |
| 1673 | goto out; |
| 1674 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1675 | rc = proto_register(&tcp_prot, 1); |
| 1676 | if (rc) |
Amerigo Wang | e3826f1 | 2010-05-05 00:27:06 +0000 | [diff] [blame] | 1677 | goto out_free_reserved_ports; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1678 | |
| 1679 | rc = proto_register(&udp_prot, 1); |
| 1680 | if (rc) |
| 1681 | goto out_unregister_tcp_proto; |
| 1682 | |
| 1683 | rc = proto_register(&raw_prot, 1); |
| 1684 | if (rc) |
| 1685 | goto out_unregister_udp_proto; |
| 1686 | |
Vasiliy Kulikov | c319b4d | 2011-05-13 10:01:00 +0000 | [diff] [blame] | 1687 | rc = proto_register(&ping_prot, 1); |
| 1688 | if (rc) |
| 1689 | goto out_unregister_raw_proto; |
| 1690 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1691 | /* |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1692 | * Tell SOCKET that we are alive... |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1693 | */ |
| 1694 | |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1695 | (void)sock_register(&inet_family_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1696 | |
Al Viro | bd7b153 | 2008-07-15 16:00:59 -0400 | [diff] [blame] | 1697 | #ifdef CONFIG_SYSCTL |
| 1698 | ip_static_sysctl_init(); |
| 1699 | #endif |
| 1700 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1701 | /* |
| 1702 | * Add all the base protocols. |
| 1703 | */ |
| 1704 | |
| 1705 | if (inet_add_protocol(&icmp_protocol, IPPROTO_ICMP) < 0) |
Joe Perches | 058bd4d | 2012-03-11 18:36:11 +0000 | [diff] [blame] | 1706 | pr_crit("%s: Cannot add ICMP protocol\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1707 | if (inet_add_protocol(&udp_protocol, IPPROTO_UDP) < 0) |
Joe Perches | 058bd4d | 2012-03-11 18:36:11 +0000 | [diff] [blame] | 1708 | pr_crit("%s: Cannot add UDP protocol\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1709 | if (inet_add_protocol(&tcp_protocol, IPPROTO_TCP) < 0) |
Joe Perches | 058bd4d | 2012-03-11 18:36:11 +0000 | [diff] [blame] | 1710 | pr_crit("%s: Cannot add TCP protocol\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1711 | #ifdef CONFIG_IP_MULTICAST |
| 1712 | if (inet_add_protocol(&igmp_protocol, IPPROTO_IGMP) < 0) |
Joe Perches | 058bd4d | 2012-03-11 18:36:11 +0000 | [diff] [blame] | 1713 | pr_crit("%s: Cannot add IGMP protocol\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1714 | #endif |
| 1715 | |
| 1716 | /* Register the socket-side information for inet_create. */ |
| 1717 | for (r = &inetsw[0]; r < &inetsw[SOCK_MAX]; ++r) |
| 1718 | INIT_LIST_HEAD(r); |
| 1719 | |
| 1720 | for (q = inetsw_array; q < &inetsw_array[INETSW_ARRAY_LEN]; ++q) |
| 1721 | inet_register_protosw(q); |
| 1722 | |
| 1723 | /* |
| 1724 | * Set the ARP module up |
| 1725 | */ |
| 1726 | |
| 1727 | arp_init(); |
| 1728 | |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1729 | /* |
| 1730 | * Set the IP module up |
| 1731 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1732 | |
| 1733 | ip_init(); |
| 1734 | |
Denis V. Lunev | 9b0f976 | 2008-02-29 11:13:15 -0800 | [diff] [blame] | 1735 | tcp_v4_init(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1736 | |
| 1737 | /* Setup TCP slab cache for open requests. */ |
| 1738 | tcp_init(); |
| 1739 | |
Hideo Aoki | 95766ff | 2007-12-31 00:29:24 -0800 | [diff] [blame] | 1740 | /* Setup UDP memory threshold */ |
| 1741 | udp_init(); |
| 1742 | |
Gerrit Renker | ba4e58e | 2006-11-27 11:10:57 -0800 | [diff] [blame] | 1743 | /* Add UDP-Lite (RFC 3828) */ |
| 1744 | udplite4_register(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1745 | |
Vasiliy Kulikov | c319b4d | 2011-05-13 10:01:00 +0000 | [diff] [blame] | 1746 | ping_init(); |
| 1747 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1748 | /* |
| 1749 | * Set the ICMP layer up |
| 1750 | */ |
| 1751 | |
Denis V. Lunev | a5710d6 | 2008-02-29 11:14:50 -0800 | [diff] [blame] | 1752 | if (icmp_init() < 0) |
| 1753 | panic("Failed to create the ICMP control socket.\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1754 | |
| 1755 | /* |
| 1756 | * Initialise the multicast router |
| 1757 | */ |
| 1758 | #if defined(CONFIG_IP_MROUTE) |
Wang Chen | 03d2f89 | 2008-07-03 12:13:36 +0800 | [diff] [blame] | 1759 | if (ip_mr_init()) |
Joe Perches | 058bd4d | 2012-03-11 18:36:11 +0000 | [diff] [blame] | 1760 | pr_crit("%s: Cannot init ipv4 mroute\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1761 | #endif |
| 1762 | /* |
| 1763 | * Initialise per-cpu ipv4 mibs |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1764 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1765 | |
Stephen Hemminger | 132adf5 | 2007-03-08 20:44:43 -0800 | [diff] [blame] | 1766 | if (init_ipv4_mibs()) |
Joe Perches | 058bd4d | 2012-03-11 18:36:11 +0000 | [diff] [blame] | 1767 | pr_crit("%s: Cannot init ipv4 mibs\n", __func__); |
YOSHIFUJI Hideaki | e905a9e | 2007-02-09 23:24:47 +0900 | [diff] [blame] | 1768 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1769 | ipv4_proc_init(); |
| 1770 | |
| 1771 | ipfrag_init(); |
| 1772 | |
Herbert Xu | 30e224d | 2005-07-05 14:40:10 -0700 | [diff] [blame] | 1773 | dev_add_pack(&ip_packet_type); |
| 1774 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1775 | rc = 0; |
| 1776 | out: |
| 1777 | return rc; |
Vasiliy Kulikov | c319b4d | 2011-05-13 10:01:00 +0000 | [diff] [blame] | 1778 | out_unregister_raw_proto: |
| 1779 | proto_unregister(&raw_prot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1780 | out_unregister_udp_proto: |
| 1781 | proto_unregister(&udp_prot); |
Olaf Kirch | 321efff | 2006-09-27 16:33:45 -0700 | [diff] [blame] | 1782 | out_unregister_tcp_proto: |
| 1783 | proto_unregister(&tcp_prot); |
Amerigo Wang | e3826f1 | 2010-05-05 00:27:06 +0000 | [diff] [blame] | 1784 | out_free_reserved_ports: |
| 1785 | kfree(sysctl_local_reserved_ports); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1786 | goto out; |
| 1787 | } |
| 1788 | |
Heiko Carstens | a536e07 | 2006-04-28 15:19:17 -0700 | [diff] [blame] | 1789 | fs_initcall(inet_init); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1790 | |
| 1791 | /* ------------------------------------------------------------------------ */ |
| 1792 | |
| 1793 | #ifdef CONFIG_PROC_FS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1794 | static int __init ipv4_proc_init(void) |
| 1795 | { |
| 1796 | int rc = 0; |
| 1797 | |
| 1798 | if (raw_proc_init()) |
| 1799 | goto out_raw; |
| 1800 | if (tcp4_proc_init()) |
| 1801 | goto out_tcp; |
| 1802 | if (udp4_proc_init()) |
| 1803 | goto out_udp; |
Vasiliy Kulikov | c319b4d | 2011-05-13 10:01:00 +0000 | [diff] [blame] | 1804 | if (ping_proc_init()) |
| 1805 | goto out_ping; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1806 | if (ip_misc_proc_init()) |
| 1807 | goto out_misc; |
| 1808 | out: |
| 1809 | return rc; |
| 1810 | out_misc: |
Vasiliy Kulikov | c319b4d | 2011-05-13 10:01:00 +0000 | [diff] [blame] | 1811 | ping_proc_exit(); |
| 1812 | out_ping: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1813 | udp4_proc_exit(); |
| 1814 | out_udp: |
| 1815 | tcp4_proc_exit(); |
| 1816 | out_tcp: |
| 1817 | raw_proc_exit(); |
| 1818 | out_raw: |
| 1819 | rc = -ENOMEM; |
| 1820 | goto out; |
| 1821 | } |
| 1822 | |
| 1823 | #else /* CONFIG_PROC_FS */ |
| 1824 | static int __init ipv4_proc_init(void) |
| 1825 | { |
| 1826 | return 0; |
| 1827 | } |
| 1828 | #endif /* CONFIG_PROC_FS */ |
| 1829 | |
| 1830 | MODULE_ALIAS_NETPROTO(PF_INET); |
| 1831 | |