blob: edc414625be28a5f8a19a90ee65efb39a83c7264 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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 Juhl02c30a82005-05-05 16:16:16 -07008 * Authors: Ross Biro
Linus Torvalds1da177e2005-04-16 15:20:36 -07009 * 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 Perchesafd465032012-03-12 07:03:32 +000068#define pr_fmt(fmt) "IPv4: " fmt
69
Herbert Xuf4c50d92006-06-22 03:02:40 -070070#include <linux/err.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070071#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 Torvalds1da177e2005-04-16 15:20:36 -070076#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 Dunlap4fc268d2006-01-11 12:17:47 -080082#include <linux/capability.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070083#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. Millerb3da2cf2007-03-23 11:40:27 -070090#include <linux/random.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090091#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070092
93#include <asm/uaccess.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070094
Linus Torvalds1da177e2005-04-16 15:20:36 -070095#include <linux/inet.h>
96#include <linux/igmp.h>
Arnaldo Carvalho de Melo14c85022005-12-27 02:43:12 -020097#include <linux/inetdevice.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070098#include <linux/netdevice.h>
Herbert Xu73cc19f2008-12-15 23:41:09 -080099#include <net/checksum.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100#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 Melo295f7322005-08-09 20:11:56 -0700105#include <net/inet_connection_sock.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106#include <net/tcp.h>
107#include <net/udp.h>
Gerrit Renkerba4e58e2006-11-27 11:10:57 -0800108#include <net/udplite.h>
Vasiliy Kulikovc319b4d2011-05-13 10:01:00 +0000109#include <net/ping.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110#include <linux/skbuff.h>
111#include <net/sock.h>
112#include <net/raw.h>
113#include <net/icmp.h>
114#include <net/ipip.h>
115#include <net/inet_common.h>
116#include <net/xfrm.h>
Pavel Emelyanov9b4661b2008-07-18 04:01:44 -0700117#include <net/net_namespace.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118#ifdef CONFIG_IP_MROUTE
119#include <linux/mroute.h>
120#endif
121
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122
123/* The inetsw table contains everything that inet_create needs to
124 * build a new socket.
125 */
126static struct list_head inetsw[SOCK_MAX];
127static DEFINE_SPINLOCK(inetsw_lock);
128
Pavel Emelyanov9ba63972007-12-05 01:38:23 -0800129struct ipv4_config ipv4_config;
Pavel Emelyanov9ba63972007-12-05 01:38:23 -0800130EXPORT_SYMBOL(ipv4_config);
131
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132/* New destruction routine */
133
134void 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 Aoki95766ff2007-12-31 00:29:24 -0800141 sk_mem_reclaim(sk);
142
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143 if (sk->sk_type == SOCK_STREAM && sk->sk_state != TCP_CLOSE) {
Eric Dumazet3d1427f2009-08-28 23:45:21 -0700144 pr_err("Attempt to release TCP socket in state %d %p\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145 sk->sk_state, sk);
146 return;
147 }
148 if (!sock_flag(sk, SOCK_DEAD)) {
Eric Dumazet3d1427f2009-08-28 23:45:21 -0700149 pr_err("Attempt to release alive inet socket %p\n", sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150 return;
151 }
152
Ilpo Järvinen547b7922008-07-25 21:43:18 -0700153 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 Torvalds1da177e2005-04-16 15:20:36 -0700157
Eric Dumazetf6d8bd02011-04-21 09:45:37 +0000158 kfree(rcu_dereference_protected(inet->inet_opt, 1));
Eric Dumazetb6c67122010-04-08 23:03:29 +0000159 dst_release(rcu_dereference_check(sk->sk_dst_cache, 1));
David S. Miller41063e92012-06-19 21:22:05 -0700160 dst_release(sk->sk_rx_dst);
Arnaldo Carvalho de Meloe6848972005-08-09 19:45:38 -0700161 sk_refcnt_debug_dec(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162}
Eric Dumazet3d1427f2009-08-28 23:45:21 -0700163EXPORT_SYMBOL(inet_sock_destruct);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164
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
175static 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 Dumazetc720c7e2009-10-15 06:30:45 +0000181 if (!inet->inet_num) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182 if (sk->sk_prot->get_port(sk, 0)) {
183 release_sock(sk);
184 return -EAGAIN;
185 }
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000186 inet->inet_sport = htons(inet->inet_num);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187 }
188 release_sock(sk);
189 return 0;
190}
191
192/*
193 * Move a socket into listening state.
194 */
195int 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) {
Eric Dumazet72a3eff2006-11-16 02:30:37 -0800215 err = inet_csk_listen_start(sk, backlog);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216 if (err)
217 goto out;
218 }
219 sk->sk_max_ack_backlog = backlog;
220 err = 0;
221
222out:
223 release_sock(sk);
224 return err;
225}
Eric Dumazet3d1427f2009-08-28 23:45:21 -0700226EXPORT_SYMBOL(inet_listen);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227
Eric Dumazetbe776282007-03-27 13:53:04 -0700228u32 inet_ehash_secret __read_mostly;
David S. Millerb3da2cf2007-03-23 11:40:27 -0700229EXPORT_SYMBOL(inet_ehash_secret);
230
Eric Dumazetbe776282007-03-27 13:53:04 -0700231/*
232 * inet_ehash_secret must be set exactly once
Eric Dumazetbe776282007-03-27 13:53:04 -0700233 */
David S. Millerb3da2cf2007-03-23 11:40:27 -0700234void build_ehash_secret(void)
235{
Eric Dumazetbe776282007-03-27 13:53:04 -0700236 u32 rnd;
Eric Dumazet49e8ab02010-08-19 06:10:45 +0000237
Eric Dumazetbe776282007-03-27 13:53:04 -0700238 do {
239 get_random_bytes(&rnd, sizeof(rnd));
240 } while (rnd == 0);
Eric Dumazet49e8ab02010-08-19 06:10:45 +0000241
242 cmpxchg(&inet_ehash_secret, 0, rnd);
David S. Millerb3da2cf2007-03-23 11:40:27 -0700243}
244EXPORT_SYMBOL(build_ehash_secret);
245
David S. Millerf9242b62012-06-19 18:56:21 -0700246static inline int inet_netns_ok(struct net *net, __u8 protocol)
Denis V. Lunev2342fd72008-03-24 15:33:42 -0700247{
Alexey Dobriyan32613092009-09-14 12:21:47 +0000248 const struct net_protocol *ipprot;
Denis V. Lunev2342fd72008-03-24 15:33:42 -0700249
Eric Dumazet04f258c2008-11-23 15:42:23 -0800250 if (net_eq(net, &init_net))
Denis V. Lunev2342fd72008-03-24 15:33:42 -0700251 return 1;
252
David S. Millerf9242b62012-06-19 18:56:21 -0700253 ipprot = rcu_dereference(inet_protos[protocol]);
254 if (ipprot == NULL) {
Denis V. Lunev2342fd72008-03-24 15:33:42 -0700255 /* raw IP is OK */
256 return 1;
David S. Millerf9242b62012-06-19 18:56:21 -0700257 }
Denis V. Lunev2342fd72008-03-24 15:33:42 -0700258 return ipprot->netns_ok;
259}
260
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261/*
262 * Create an inet socket.
263 */
264
Eric Paris3f378b62009-11-05 22:18:14 -0800265static int inet_create(struct net *net, struct socket *sock, int protocol,
266 int kern)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267{
268 struct sock *sk;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269 struct inet_protosw *answer;
270 struct inet_sock *inet;
271 struct proto *answer_prot;
272 unsigned char answer_flags;
273 char answer_no_check;
Arnaldo Carvalho de Melobb97d312005-08-09 20:19:14 -0700274 int try_loading_module = 0;
Herbert Xu86c8f9d2005-12-02 20:43:26 -0800275 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276
Eric Dumazet04f258c2008-11-23 15:42:23 -0800277 if (unlikely(!inet_ehash_secret))
278 if (sock->type != SOCK_RAW && sock->type != SOCK_DGRAM)
279 build_ehash_secret();
David S. Millerb3da2cf2007-03-23 11:40:27 -0700280
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281 sock->state = SS_UNCONNECTED;
282
283 /* Look for the requested type/protocol pair. */
Arnaldo Carvalho de Melobb97d312005-08-09 20:19:14 -0700284lookup_protocol:
Herbert Xu86c8f9d2005-12-02 20:43:26 -0800285 err = -ESOCKTNOSUPPORT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286 rcu_read_lock();
Paul E. McKenney696adfe2008-07-25 01:45:34 -0700287 list_for_each_entry_rcu(answer, &inetsw[sock->type], list) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288
Paul E. McKenney696adfe2008-07-25 01:45:34 -0700289 err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290 /* Check the non-wild match. */
291 if (protocol == answer->protocol) {
292 if (protocol != IPPROTO_IP)
293 break;
294 } else {
295 /* Check for the two wild cases. */
296 if (IPPROTO_IP == protocol) {
297 protocol = answer->protocol;
298 break;
299 }
300 if (IPPROTO_IP == answer->protocol)
301 break;
302 }
Herbert Xu86c8f9d2005-12-02 20:43:26 -0800303 err = -EPROTONOSUPPORT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304 }
305
Paul E. McKenney696adfe2008-07-25 01:45:34 -0700306 if (unlikely(err)) {
Arnaldo Carvalho de Melobb97d312005-08-09 20:19:14 -0700307 if (try_loading_module < 2) {
308 rcu_read_unlock();
309 /*
310 * Be more specific, e.g. net-pf-2-proto-132-type-1
311 * (net-pf-PF_INET-proto-IPPROTO_SCTP-type-SOCK_STREAM)
312 */
313 if (++try_loading_module == 1)
314 request_module("net-pf-%d-proto-%d-type-%d",
315 PF_INET, protocol, sock->type);
316 /*
317 * Fall back to generic, e.g. net-pf-2-proto-132
318 * (net-pf-PF_INET-proto-IPPROTO_SCTP)
319 */
320 else
321 request_module("net-pf-%d-proto-%d",
322 PF_INET, protocol);
323 goto lookup_protocol;
324 } else
325 goto out_rcu_unlock;
326 }
327
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328 err = -EPERM;
Eric Parisc84b3262009-11-05 20:45:52 -0800329 if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330 goto out_rcu_unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331
Denis V. Lunev2342fd72008-03-24 15:33:42 -0700332 err = -EAFNOSUPPORT;
333 if (!inet_netns_ok(net, protocol))
334 goto out_rcu_unlock;
335
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336 sock->ops = answer->ops;
337 answer_prot = answer->prot;
338 answer_no_check = answer->no_check;
339 answer_flags = answer->flags;
340 rcu_read_unlock();
341
Ilpo Järvinen547b7922008-07-25 21:43:18 -0700342 WARN_ON(answer_prot->slab == NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343
344 err = -ENOBUFS;
Pavel Emelyanov6257ff22007-11-01 00:39:31 -0700345 sk = sk_alloc(net, PF_INET, GFP_KERNEL, answer_prot);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346 if (sk == NULL)
347 goto out;
348
349 err = 0;
350 sk->sk_no_check = answer_no_check;
351 if (INET_PROTOSW_REUSE & answer_flags)
Pavel Emelyanov4a17fd52012-04-19 03:39:36 +0000352 sk->sk_reuse = SK_CAN_REUSE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353
354 inet = inet_sk(sk);
Paul Moore469de9b2007-01-09 14:37:06 -0800355 inet->is_icsk = (INET_PROTOSW_ICSK & answer_flags) != 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356
Jiri Olsa7b2ff182010-06-15 01:07:31 +0000357 inet->nodefrag = 0;
358
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359 if (SOCK_RAW == sock->type) {
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000360 inet->inet_num = protocol;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361 if (IPPROTO_RAW == protocol)
362 inet->hdrincl = 1;
363 }
364
365 if (ipv4_config.no_pmtu_disc)
366 inet->pmtudisc = IP_PMTUDISC_DONT;
367 else
368 inet->pmtudisc = IP_PMTUDISC_WANT;
369
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000370 inet->inet_id = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371
372 sock_init_data(sock, sk);
373
374 sk->sk_destruct = inet_sock_destruct;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375 sk->sk_protocol = protocol;
376 sk->sk_backlog_rcv = sk->sk_prot->backlog_rcv;
377
378 inet->uc_ttl = -1;
379 inet->mc_loop = 1;
380 inet->mc_ttl = 1;
Nivedita Singhvif771bef2009-05-28 07:00:46 +0000381 inet->mc_all = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382 inet->mc_index = 0;
383 inet->mc_list = NULL;
Jiri Benc4c507d22012-02-09 09:35:49 +0000384 inet->rcv_tos = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385
Arnaldo Carvalho de Meloe6848972005-08-09 19:45:38 -0700386 sk_refcnt_debug_inc(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000388 if (inet->inet_num) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389 /* It assumes that any protocol which allows
390 * the user to assign a number at socket
391 * creation time automatically
392 * shares.
393 */
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000394 inet->inet_sport = htons(inet->inet_num);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395 /* Add to protocol hash chains. */
396 sk->sk_prot->hash(sk);
397 }
398
399 if (sk->sk_prot->init) {
400 err = sk->sk_prot->init(sk);
401 if (err)
402 sk_common_release(sk);
403 }
404out:
405 return err;
406out_rcu_unlock:
407 rcu_read_unlock();
408 goto out;
409}
410
411
412/*
413 * The peer socket should always be NULL (or else). When we call this
414 * function we are destroying the object and from then on nobody
415 * should refer to it.
416 */
417int inet_release(struct socket *sock)
418{
419 struct sock *sk = sock->sk;
420
421 if (sk) {
422 long timeout;
423
David S. Millerc58dc012010-04-27 15:05:31 -0700424 sock_rps_reset_flow(sk);
Tom Herbertfec5e652010-04-16 16:01:27 -0700425
Linus Torvalds1da177e2005-04-16 15:20:36 -0700426 /* Applications forget to leave groups before exiting */
427 ip_mc_drop_socket(sk);
428
429 /* If linger is set, we don't return until the close
430 * is complete. Otherwise we return immediately. The
431 * actually closing is done the same either way.
432 *
433 * If the close is due to the process exiting, we never
434 * linger..
435 */
436 timeout = 0;
437 if (sock_flag(sk, SOCK_LINGER) &&
438 !(current->flags & PF_EXITING))
439 timeout = sk->sk_lingertime;
440 sock->sk = NULL;
441 sk->sk_prot->close(sk, timeout);
442 }
443 return 0;
444}
Eric Dumazet3d1427f2009-08-28 23:45:21 -0700445EXPORT_SYMBOL(inet_release);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446
447/* It is off by default, see below. */
Brian Haleyab32ea52006-09-22 14:15:41 -0700448int sysctl_ip_nonlocal_bind __read_mostly;
Eric Dumazet3d1427f2009-08-28 23:45:21 -0700449EXPORT_SYMBOL(sysctl_ip_nonlocal_bind);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700450
451int inet_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
452{
453 struct sockaddr_in *addr = (struct sockaddr_in *)uaddr;
454 struct sock *sk = sock->sk;
455 struct inet_sock *inet = inet_sk(sk);
456 unsigned short snum;
457 int chk_addr_ret;
458 int err;
459
460 /* If the socket has its own bind function then use it. (RAW) */
461 if (sk->sk_prot->bind) {
462 err = sk->sk_prot->bind(sk, uaddr, addr_len);
463 goto out;
464 }
465 err = -EINVAL;
466 if (addr_len < sizeof(struct sockaddr_in))
467 goto out;
468
Marcus Meissnerc349a522011-07-04 01:30:29 +0000469 if (addr->sin_family != AF_INET) {
Eric Dumazet29c486d2011-08-30 18:57:00 -0400470 /* Compatibility games : accept AF_UNSPEC (mapped to AF_INET)
471 * only if s_addr is INADDR_ANY.
472 */
Marcus Meissnerc349a522011-07-04 01:30:29 +0000473 err = -EAFNOSUPPORT;
Eric Dumazet29c486d2011-08-30 18:57:00 -0400474 if (addr->sin_family != AF_UNSPEC ||
475 addr->sin_addr.s_addr != htonl(INADDR_ANY))
476 goto out;
Marcus Meissnerc349a522011-07-04 01:30:29 +0000477 }
Marcus Meissnerd0733d22011-06-01 21:05:22 -0700478
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +0900479 chk_addr_ret = inet_addr_type(sock_net(sk), addr->sin_addr.s_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480
481 /* Not specified by any standard per-se, however it breaks too
482 * many applications when removed. It is unfortunate since
483 * allowing applications to make a non-local bind solves
484 * several problems with systems using dynamic addressing.
485 * (ie. your servers still start up even if your ISDN link
486 * is temporarily down)
487 */
488 err = -EADDRNOTAVAIL;
489 if (!sysctl_ip_nonlocal_bind &&
Tóth László Attilab9fb1502008-10-01 07:31:24 -0700490 !(inet->freebind || inet->transparent) &&
Al Viroe6f1ceb2008-03-17 22:44:53 -0700491 addr->sin_addr.s_addr != htonl(INADDR_ANY) &&
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492 chk_addr_ret != RTN_LOCAL &&
493 chk_addr_ret != RTN_MULTICAST &&
494 chk_addr_ret != RTN_BROADCAST)
495 goto out;
496
497 snum = ntohs(addr->sin_port);
498 err = -EACCES;
499 if (snum && snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
500 goto out;
501
502 /* We keep a pair of addresses. rcv_saddr is the one
503 * used by hash lookups, and saddr is used for transmit.
504 *
505 * In the BSD API these are the same except where it
506 * would be illegal to use them (multicast/broadcast) in
507 * which case the sending device address is used.
508 */
509 lock_sock(sk);
510
511 /* Check these errors (active socket, double bind). */
512 err = -EINVAL;
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000513 if (sk->sk_state != TCP_CLOSE || inet->inet_num)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700514 goto out_release_sock;
515
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000516 inet->inet_rcv_saddr = inet->inet_saddr = addr->sin_addr.s_addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517 if (chk_addr_ret == RTN_MULTICAST || chk_addr_ret == RTN_BROADCAST)
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000518 inet->inet_saddr = 0; /* Use device */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519
520 /* Make sure we are allowed to bind here. */
521 if (sk->sk_prot->get_port(sk, snum)) {
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000522 inet->inet_saddr = inet->inet_rcv_saddr = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523 err = -EADDRINUSE;
524 goto out_release_sock;
525 }
526
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000527 if (inet->inet_rcv_saddr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700528 sk->sk_userlocks |= SOCK_BINDADDR_LOCK;
529 if (snum)
530 sk->sk_userlocks |= SOCK_BINDPORT_LOCK;
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000531 inet->inet_sport = htons(inet->inet_num);
532 inet->inet_daddr = 0;
533 inet->inet_dport = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700534 sk_dst_reset(sk);
535 err = 0;
536out_release_sock:
537 release_sock(sk);
538out:
539 return err;
540}
Eric Dumazet3d1427f2009-08-28 23:45:21 -0700541EXPORT_SYMBOL(inet_bind);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542
Daniel Baluta5e73ea12012-04-15 01:34:41 +0000543int inet_dgram_connect(struct socket *sock, struct sockaddr *uaddr,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700544 int addr_len, int flags)
545{
546 struct sock *sk = sock->sk;
547
Changli Gao6503d962010-03-31 22:58:26 +0000548 if (addr_len < sizeof(uaddr->sa_family))
549 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550 if (uaddr->sa_family == AF_UNSPEC)
551 return sk->sk_prot->disconnect(sk, flags);
552
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000553 if (!inet_sk(sk)->inet_num && inet_autobind(sk))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700554 return -EAGAIN;
Joe Perchese3192692012-06-03 17:41:40 +0000555 return sk->sk_prot->connect(sk, uaddr, addr_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556}
Eric Dumazet3d1427f2009-08-28 23:45:21 -0700557EXPORT_SYMBOL(inet_dgram_connect);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700558
Yuchung Cheng783237e2012-07-19 06:43:07 +0000559static long inet_wait_for_connect(struct sock *sk, long timeo, int writebias)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560{
561 DEFINE_WAIT(wait);
562
Eric Dumazetaa395142010-04-20 13:03:51 +0000563 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
Yuchung Cheng783237e2012-07-19 06:43:07 +0000564 sk->sk_write_pending += writebias;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700565
566 /* Basic assumption: if someone sets sk->sk_err, he _must_
567 * change state of the socket from TCP_SYN_*.
568 * Connect() does not allow to get error notifications
569 * without closing the socket.
570 */
571 while ((1 << sk->sk_state) & (TCPF_SYN_SENT | TCPF_SYN_RECV)) {
572 release_sock(sk);
573 timeo = schedule_timeout(timeo);
574 lock_sock(sk);
575 if (signal_pending(current) || !timeo)
576 break;
Eric Dumazetaa395142010-04-20 13:03:51 +0000577 prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578 }
Eric Dumazetaa395142010-04-20 13:03:51 +0000579 finish_wait(sk_sleep(sk), &wait);
Yuchung Cheng783237e2012-07-19 06:43:07 +0000580 sk->sk_write_pending -= writebias;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581 return timeo;
582}
583
584/*
585 * Connect to a remote host. There is regrettably still a little
586 * TCP 'magic' in here.
587 */
588int inet_stream_connect(struct socket *sock, struct sockaddr *uaddr,
589 int addr_len, int flags)
590{
591 struct sock *sk = sock->sk;
592 int err;
593 long timeo;
594
Changli Gao6503d962010-03-31 22:58:26 +0000595 if (addr_len < sizeof(uaddr->sa_family))
596 return -EINVAL;
597
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598 lock_sock(sk);
599
600 if (uaddr->sa_family == AF_UNSPEC) {
601 err = sk->sk_prot->disconnect(sk, flags);
602 sock->state = err ? SS_DISCONNECTING : SS_UNCONNECTED;
603 goto out;
604 }
605
606 switch (sock->state) {
607 default:
608 err = -EINVAL;
609 goto out;
610 case SS_CONNECTED:
611 err = -EISCONN;
612 goto out;
613 case SS_CONNECTING:
614 err = -EALREADY;
615 /* Fall out of switch with err, set for this state */
616 break;
617 case SS_UNCONNECTED:
618 err = -EISCONN;
619 if (sk->sk_state != TCP_CLOSE)
620 goto out;
621
622 err = sk->sk_prot->connect(sk, uaddr, addr_len);
623 if (err < 0)
624 goto out;
625
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +0900626 sock->state = SS_CONNECTING;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700627
628 /* Just entered SS_CONNECTING state; the only
629 * difference is that return value in non-blocking
630 * case is EINPROGRESS, rather than EALREADY.
631 */
632 err = -EINPROGRESS;
633 break;
634 }
635
636 timeo = sock_sndtimeo(sk, flags & O_NONBLOCK);
637
638 if ((1 << sk->sk_state) & (TCPF_SYN_SENT | TCPF_SYN_RECV)) {
Yuchung Cheng783237e2012-07-19 06:43:07 +0000639 int writebias = (sk->sk_protocol == IPPROTO_TCP) &&
640 tcp_sk(sk)->fastopen_req &&
641 tcp_sk(sk)->fastopen_req->data ? 1 : 0;
642
Linus Torvalds1da177e2005-04-16 15:20:36 -0700643 /* Error code is set above */
Yuchung Cheng783237e2012-07-19 06:43:07 +0000644 if (!timeo || !inet_wait_for_connect(sk, timeo, writebias))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645 goto out;
646
647 err = sock_intr_errno(timeo);
648 if (signal_pending(current))
649 goto out;
650 }
651
652 /* Connection was closed by RST, timeout, ICMP error
653 * or another process disconnected us.
654 */
655 if (sk->sk_state == TCP_CLOSE)
656 goto sock_error;
657
658 /* sk->sk_err may be not zero now, if RECVERR was ordered by user
659 * and error was received after socket entered established state.
660 * Hence, it is handled normally after connect() return successfully.
661 */
662
663 sock->state = SS_CONNECTED;
664 err = 0;
665out:
666 release_sock(sk);
667 return err;
668
669sock_error:
670 err = sock_error(sk) ? : -ECONNABORTED;
671 sock->state = SS_UNCONNECTED;
672 if (sk->sk_prot->disconnect(sk, flags))
673 sock->state = SS_DISCONNECTING;
674 goto out;
675}
Eric Dumazet3d1427f2009-08-28 23:45:21 -0700676EXPORT_SYMBOL(inet_stream_connect);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700677
678/*
679 * Accept a pending connection. The TCP layer now gives BSD semantics.
680 */
681
682int inet_accept(struct socket *sock, struct socket *newsock, int flags)
683{
684 struct sock *sk1 = sock->sk;
685 int err = -EINVAL;
686 struct sock *sk2 = sk1->sk_prot->accept(sk1, flags, &err);
687
688 if (!sk2)
689 goto do_err;
690
691 lock_sock(sk2);
692
Eric Dumazet1eddcea2011-06-17 03:45:15 +0000693 sock_rps_record_flow(sk2);
Ilpo Järvinen547b7922008-07-25 21:43:18 -0700694 WARN_ON(!((1 << sk2->sk_state) &
695 (TCPF_ESTABLISHED | TCPF_CLOSE_WAIT | TCPF_CLOSE)));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700696
697 sock_graft(sk2, newsock);
698
699 newsock->state = SS_CONNECTED;
700 err = 0;
701 release_sock(sk2);
702do_err:
703 return err;
704}
Eric Dumazet3d1427f2009-08-28 23:45:21 -0700705EXPORT_SYMBOL(inet_accept);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706
707
708/*
709 * This does both peername and sockname.
710 */
711int inet_getname(struct socket *sock, struct sockaddr *uaddr,
712 int *uaddr_len, int peer)
713{
714 struct sock *sk = sock->sk;
715 struct inet_sock *inet = inet_sk(sk);
Cyrill Gorcunov38bfd8f2009-10-29 02:59:18 -0700716 DECLARE_SOCKADDR(struct sockaddr_in *, sin, uaddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700717
718 sin->sin_family = AF_INET;
719 if (peer) {
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000720 if (!inet->inet_dport ||
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721 (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) &&
722 peer == 1))
723 return -ENOTCONN;
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000724 sin->sin_port = inet->inet_dport;
725 sin->sin_addr.s_addr = inet->inet_daddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700726 } else {
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000727 __be32 addr = inet->inet_rcv_saddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700728 if (!addr)
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000729 addr = inet->inet_saddr;
730 sin->sin_port = inet->inet_sport;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700731 sin->sin_addr.s_addr = addr;
732 }
733 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
734 *uaddr_len = sizeof(*sin);
735 return 0;
736}
Eric Dumazet3d1427f2009-08-28 23:45:21 -0700737EXPORT_SYMBOL(inet_getname);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700738
739int inet_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg,
740 size_t size)
741{
742 struct sock *sk = sock->sk;
743
David S. Millerc58dc012010-04-27 15:05:31 -0700744 sock_rps_record_flow(sk);
Tom Herbertfec5e652010-04-16 16:01:27 -0700745
Linus Torvalds1da177e2005-04-16 15:20:36 -0700746 /* We may need to bind the socket. */
Changli Gao7ba42912010-07-10 20:41:55 +0000747 if (!inet_sk(sk)->inet_num && !sk->sk_prot->no_autobind &&
748 inet_autobind(sk))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700749 return -EAGAIN;
750
751 return sk->sk_prot->sendmsg(iocb, sk, msg, size);
752}
Eric Dumazet3d1427f2009-08-28 23:45:21 -0700753EXPORT_SYMBOL(inet_sendmsg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700754
Changli Gao7ba42912010-07-10 20:41:55 +0000755ssize_t inet_sendpage(struct socket *sock, struct page *page, int offset,
756 size_t size, int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757{
758 struct sock *sk = sock->sk;
759
David S. Millerc58dc012010-04-27 15:05:31 -0700760 sock_rps_record_flow(sk);
Tom Herbertfec5e652010-04-16 16:01:27 -0700761
Linus Torvalds1da177e2005-04-16 15:20:36 -0700762 /* We may need to bind the socket. */
Changli Gao7ba42912010-07-10 20:41:55 +0000763 if (!inet_sk(sk)->inet_num && !sk->sk_prot->no_autobind &&
764 inet_autobind(sk))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700765 return -EAGAIN;
766
767 if (sk->sk_prot->sendpage)
768 return sk->sk_prot->sendpage(sk, page, offset, size, flags);
769 return sock_no_sendpage(sock, page, offset, size, flags);
770}
Changli Gao7ba42912010-07-10 20:41:55 +0000771EXPORT_SYMBOL(inet_sendpage);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700772
Tom Herbertfec5e652010-04-16 16:01:27 -0700773int inet_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg,
774 size_t size, int flags)
775{
776 struct sock *sk = sock->sk;
777 int addr_len = 0;
778 int err;
779
David S. Millerc58dc012010-04-27 15:05:31 -0700780 sock_rps_record_flow(sk);
Tom Herbertfec5e652010-04-16 16:01:27 -0700781
782 err = sk->sk_prot->recvmsg(iocb, sk, msg, size, flags & MSG_DONTWAIT,
783 flags & ~MSG_DONTWAIT, &addr_len);
784 if (err >= 0)
785 msg->msg_namelen = addr_len;
786 return err;
787}
788EXPORT_SYMBOL(inet_recvmsg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700789
790int inet_shutdown(struct socket *sock, int how)
791{
792 struct sock *sk = sock->sk;
793 int err = 0;
794
795 /* This should really check to make sure
796 * the socket is a TCP socket. (WHY AC...)
797 */
798 how++; /* maps 0->1 has the advantage of making bit 1 rcvs and
799 1->2 bit 2 snds.
800 2->3 */
801 if ((how & ~SHUTDOWN_MASK) || !how) /* MAXINT->0 */
802 return -EINVAL;
803
804 lock_sock(sk);
805 if (sock->state == SS_CONNECTING) {
806 if ((1 << sk->sk_state) &
807 (TCPF_SYN_SENT | TCPF_SYN_RECV | TCPF_CLOSE))
808 sock->state = SS_DISCONNECTING;
809 else
810 sock->state = SS_CONNECTED;
811 }
812
813 switch (sk->sk_state) {
814 case TCP_CLOSE:
815 err = -ENOTCONN;
816 /* Hack to wake up other listeners, who can poll for
817 POLLHUP, even on eg. unconnected UDP sockets -- RR */
818 default:
819 sk->sk_shutdown |= how;
820 if (sk->sk_prot->shutdown)
821 sk->sk_prot->shutdown(sk, how);
822 break;
823
824 /* Remaining two branches are temporary solution for missing
825 * close() in multithreaded environment. It is _not_ a good idea,
826 * but we have no choice until close() is repaired at VFS level.
827 */
828 case TCP_LISTEN:
829 if (!(how & RCV_SHUTDOWN))
830 break;
831 /* Fall through */
832 case TCP_SYN_SENT:
833 err = sk->sk_prot->disconnect(sk, O_NONBLOCK);
834 sock->state = err ? SS_DISCONNECTING : SS_UNCONNECTED;
835 break;
836 }
837
838 /* Wake up anyone sleeping in poll. */
839 sk->sk_state_change(sk);
840 release_sock(sk);
841 return err;
842}
Eric Dumazet3d1427f2009-08-28 23:45:21 -0700843EXPORT_SYMBOL(inet_shutdown);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700844
845/*
846 * ioctl() calls you can issue on an INET socket. Most of these are
847 * device configuration and stuff and very rarely used. Some ioctls
848 * pass on to the socket itself.
849 *
850 * NOTE: I like the idea of a module for the config stuff. ie ifconfig
851 * loads the devconfigure module does its configuring and unloads it.
852 * There's a good 20K of config code hanging around the kernel.
853 */
854
855int inet_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
856{
857 struct sock *sk = sock->sk;
858 int err = 0;
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +0900859 struct net *net = sock_net(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700860
861 switch (cmd) {
Eric Dumazet3d1427f2009-08-28 23:45:21 -0700862 case SIOCGSTAMP:
863 err = sock_get_timestamp(sk, (struct timeval __user *)arg);
864 break;
865 case SIOCGSTAMPNS:
866 err = sock_get_timestampns(sk, (struct timespec __user *)arg);
867 break;
868 case SIOCADDRT:
869 case SIOCDELRT:
870 case SIOCRTMSG:
871 err = ip_rt_ioctl(net, cmd, (void __user *)arg);
872 break;
873 case SIOCDARP:
874 case SIOCGARP:
875 case SIOCSARP:
876 err = arp_ioctl(net, cmd, (void __user *)arg);
877 break;
878 case SIOCGIFADDR:
879 case SIOCSIFADDR:
880 case SIOCGIFBRDADDR:
881 case SIOCSIFBRDADDR:
882 case SIOCGIFNETMASK:
883 case SIOCSIFNETMASK:
884 case SIOCGIFDSTADDR:
885 case SIOCSIFDSTADDR:
886 case SIOCSIFPFLAGS:
887 case SIOCGIFPFLAGS:
888 case SIOCSIFFLAGS:
889 err = devinet_ioctl(net, cmd, (void __user *)arg);
890 break;
891 default:
892 if (sk->sk_prot->ioctl)
893 err = sk->sk_prot->ioctl(sk, cmd, arg);
894 else
895 err = -ENOIOCTLCMD;
896 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700897 }
898 return err;
899}
Eric Dumazet3d1427f2009-08-28 23:45:21 -0700900EXPORT_SYMBOL(inet_ioctl);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700901
Eric W. Biederman709b46e2011-01-29 16:15:56 +0000902#ifdef CONFIG_COMPAT
Gerrit Renker686dc6b2011-10-15 09:26:56 +0000903static int inet_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
Eric W. Biederman709b46e2011-01-29 16:15:56 +0000904{
905 struct sock *sk = sock->sk;
906 int err = -ENOIOCTLCMD;
907
908 if (sk->sk_prot->compat_ioctl)
909 err = sk->sk_prot->compat_ioctl(sk, cmd, arg);
910
911 return err;
912}
913#endif
914
Eric Dumazet90ddc4f2005-12-22 12:49:22 -0800915const struct proto_ops inet_stream_ops = {
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800916 .family = PF_INET,
917 .owner = THIS_MODULE,
918 .release = inet_release,
919 .bind = inet_bind,
920 .connect = inet_stream_connect,
921 .socketpair = sock_no_socketpair,
922 .accept = inet_accept,
923 .getname = inet_getname,
924 .poll = tcp_poll,
925 .ioctl = inet_ioctl,
926 .listen = inet_listen,
927 .shutdown = inet_shutdown,
928 .setsockopt = sock_common_setsockopt,
929 .getsockopt = sock_common_getsockopt,
Changli Gao7ba42912010-07-10 20:41:55 +0000930 .sendmsg = inet_sendmsg,
Tom Herbertfec5e652010-04-16 16:01:27 -0700931 .recvmsg = inet_recvmsg,
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800932 .mmap = sock_no_mmap,
Changli Gao7ba42912010-07-10 20:41:55 +0000933 .sendpage = inet_sendpage,
Jens Axboe9c55e012007-11-06 23:30:13 -0800934 .splice_read = tcp_splice_read,
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800935#ifdef CONFIG_COMPAT
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800936 .compat_setsockopt = compat_sock_common_setsockopt,
937 .compat_getsockopt = compat_sock_common_getsockopt,
Eric W. Biederman709b46e2011-01-29 16:15:56 +0000938 .compat_ioctl = inet_compat_ioctl,
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800939#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700940};
Eric Dumazet3d1427f2009-08-28 23:45:21 -0700941EXPORT_SYMBOL(inet_stream_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700942
Eric Dumazet90ddc4f2005-12-22 12:49:22 -0800943const struct proto_ops inet_dgram_ops = {
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800944 .family = PF_INET,
945 .owner = THIS_MODULE,
946 .release = inet_release,
947 .bind = inet_bind,
948 .connect = inet_dgram_connect,
949 .socketpair = sock_no_socketpair,
950 .accept = sock_no_accept,
951 .getname = inet_getname,
952 .poll = udp_poll,
953 .ioctl = inet_ioctl,
954 .listen = sock_no_listen,
955 .shutdown = inet_shutdown,
956 .setsockopt = sock_common_setsockopt,
957 .getsockopt = sock_common_getsockopt,
958 .sendmsg = inet_sendmsg,
Tom Herbertfec5e652010-04-16 16:01:27 -0700959 .recvmsg = inet_recvmsg,
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800960 .mmap = sock_no_mmap,
961 .sendpage = inet_sendpage,
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800962#ifdef CONFIG_COMPAT
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800963 .compat_setsockopt = compat_sock_common_setsockopt,
964 .compat_getsockopt = compat_sock_common_getsockopt,
Eric W. Biederman709b46e2011-01-29 16:15:56 +0000965 .compat_ioctl = inet_compat_ioctl,
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800966#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700967};
Eric Dumazet3d1427f2009-08-28 23:45:21 -0700968EXPORT_SYMBOL(inet_dgram_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700969
970/*
971 * For SOCK_RAW sockets; should be the same as inet_dgram_ops but without
972 * udp_poll
973 */
Eric Dumazet90ddc4f2005-12-22 12:49:22 -0800974static const struct proto_ops inet_sockraw_ops = {
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800975 .family = PF_INET,
976 .owner = THIS_MODULE,
977 .release = inet_release,
978 .bind = inet_bind,
979 .connect = inet_dgram_connect,
980 .socketpair = sock_no_socketpair,
981 .accept = sock_no_accept,
982 .getname = inet_getname,
983 .poll = datagram_poll,
984 .ioctl = inet_ioctl,
985 .listen = sock_no_listen,
986 .shutdown = inet_shutdown,
987 .setsockopt = sock_common_setsockopt,
988 .getsockopt = sock_common_getsockopt,
989 .sendmsg = inet_sendmsg,
Tom Herbertfec5e652010-04-16 16:01:27 -0700990 .recvmsg = inet_recvmsg,
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800991 .mmap = sock_no_mmap,
992 .sendpage = inet_sendpage,
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800993#ifdef CONFIG_COMPAT
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800994 .compat_setsockopt = compat_sock_common_setsockopt,
995 .compat_getsockopt = compat_sock_common_getsockopt,
Eric W. Biederman709b46e2011-01-29 16:15:56 +0000996 .compat_ioctl = inet_compat_ioctl,
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800997#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700998};
999
Stephen Hemmingerec1b4cf2009-10-05 05:58:39 +00001000static const struct net_proto_family inet_family_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001001 .family = PF_INET,
1002 .create = inet_create,
1003 .owner = THIS_MODULE,
1004};
1005
Linus Torvalds1da177e2005-04-16 15:20:36 -07001006/* Upon startup we insert all the elements in inetsw_array[] into
1007 * the linked list inetsw.
1008 */
1009static struct inet_protosw inetsw_array[] =
1010{
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +09001011 {
1012 .type = SOCK_STREAM,
1013 .protocol = IPPROTO_TCP,
1014 .prot = &tcp_prot,
1015 .ops = &inet_stream_ops,
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +09001016 .no_check = 0,
1017 .flags = INET_PROTOSW_PERMANENT |
Arnaldo Carvalho de Melod83d8462005-12-13 23:26:10 -08001018 INET_PROTOSW_ICSK,
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +09001019 },
Linus Torvalds1da177e2005-04-16 15:20:36 -07001020
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +09001021 {
1022 .type = SOCK_DGRAM,
1023 .protocol = IPPROTO_UDP,
1024 .prot = &udp_prot,
1025 .ops = &inet_dgram_ops,
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +09001026 .no_check = UDP_CSUM_DEFAULT,
1027 .flags = INET_PROTOSW_PERMANENT,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001028 },
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +09001029
Vasiliy Kulikovc319b4d2011-05-13 10:01:00 +00001030 {
1031 .type = SOCK_DGRAM,
1032 .protocol = IPPROTO_ICMP,
1033 .prot = &ping_prot,
1034 .ops = &inet_dgram_ops,
1035 .no_check = UDP_CSUM_DEFAULT,
1036 .flags = INET_PROTOSW_REUSE,
1037 },
Linus Torvalds1da177e2005-04-16 15:20:36 -07001038
1039 {
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +09001040 .type = SOCK_RAW,
1041 .protocol = IPPROTO_IP, /* wild card */
1042 .prot = &raw_prot,
1043 .ops = &inet_sockraw_ops,
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +09001044 .no_check = UDP_CSUM_DEFAULT,
1045 .flags = INET_PROTOSW_REUSE,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001046 }
1047};
1048
Denis Chengc40f6ff2007-09-16 16:39:25 -07001049#define INETSW_ARRAY_LEN ARRAY_SIZE(inetsw_array)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001050
1051void inet_register_protosw(struct inet_protosw *p)
1052{
1053 struct list_head *lh;
1054 struct inet_protosw *answer;
1055 int protocol = p->protocol;
1056 struct list_head *last_perm;
1057
1058 spin_lock_bh(&inetsw_lock);
1059
1060 if (p->type >= SOCK_MAX)
1061 goto out_illegal;
1062
1063 /* If we are trying to override a permanent protocol, bail. */
1064 answer = NULL;
1065 last_perm = &inetsw[p->type];
1066 list_for_each(lh, &inetsw[p->type]) {
1067 answer = list_entry(lh, struct inet_protosw, list);
1068
1069 /* Check only the non-wild match. */
1070 if (INET_PROTOSW_PERMANENT & answer->flags) {
1071 if (protocol == answer->protocol)
1072 break;
1073 last_perm = lh;
1074 }
1075
1076 answer = NULL;
1077 }
1078 if (answer)
1079 goto out_permanent;
1080
1081 /* Add the new entry after the last permanent entry if any, so that
1082 * the new entry does not override a permanent entry when matched with
1083 * a wild-card protocol. But it is allowed to override any existing
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +09001084 * non-permanent entry. This means that when we remove this entry, the
Linus Torvalds1da177e2005-04-16 15:20:36 -07001085 * system automatically returns to the old behavior.
1086 */
1087 list_add_rcu(&p->list, last_perm);
1088out:
1089 spin_unlock_bh(&inetsw_lock);
1090
Linus Torvalds1da177e2005-04-16 15:20:36 -07001091 return;
1092
1093out_permanent:
Joe Perches058bd4d2012-03-11 18:36:11 +00001094 pr_err("Attempt to override permanent protocol %d\n", protocol);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001095 goto out;
1096
1097out_illegal:
Joe Perches058bd4d2012-03-11 18:36:11 +00001098 pr_err("Ignoring attempt to register invalid socket type %d\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07001099 p->type);
1100 goto out;
1101}
Eric Dumazet3d1427f2009-08-28 23:45:21 -07001102EXPORT_SYMBOL(inet_register_protosw);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001103
1104void inet_unregister_protosw(struct inet_protosw *p)
1105{
1106 if (INET_PROTOSW_PERMANENT & p->flags) {
Joe Perches058bd4d2012-03-11 18:36:11 +00001107 pr_err("Attempt to unregister permanent protocol %d\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07001108 p->protocol);
1109 } else {
1110 spin_lock_bh(&inetsw_lock);
1111 list_del_rcu(&p->list);
1112 spin_unlock_bh(&inetsw_lock);
1113
1114 synchronize_net();
1115 }
1116}
Eric Dumazet3d1427f2009-08-28 23:45:21 -07001117EXPORT_SYMBOL(inet_unregister_protosw);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001118
Arnaldo Carvalho de Melo32519f12005-08-09 19:50:02 -07001119/*
1120 * Shall we try to damage output packets if routing dev changes?
1121 */
1122
Brian Haleyab32ea52006-09-22 14:15:41 -07001123int sysctl_ip_dynaddr __read_mostly;
Arnaldo Carvalho de Melo32519f12005-08-09 19:50:02 -07001124
1125static int inet_sk_reselect_saddr(struct sock *sk)
1126{
1127 struct inet_sock *inet = inet_sk(sk);
Eric Dumazetc720c7e2009-10-15 06:30:45 +00001128 __be32 old_saddr = inet->inet_saddr;
Eric Dumazetc720c7e2009-10-15 06:30:45 +00001129 __be32 daddr = inet->inet_daddr;
David S. Miller6e869132011-05-06 16:18:04 -07001130 struct flowi4 *fl4;
David S. Millerb23dd4f2011-03-02 14:31:35 -08001131 struct rtable *rt;
1132 __be32 new_saddr;
Eric Dumazetf6d8bd02011-04-21 09:45:37 +00001133 struct ip_options_rcu *inet_opt;
Arnaldo Carvalho de Melo32519f12005-08-09 19:50:02 -07001134
Eric Dumazetf6d8bd02011-04-21 09:45:37 +00001135 inet_opt = rcu_dereference_protected(inet->inet_opt,
1136 sock_owned_by_user(sk));
1137 if (inet_opt && inet_opt->opt.srr)
1138 daddr = inet_opt->opt.faddr;
Arnaldo Carvalho de Melo32519f12005-08-09 19:50:02 -07001139
1140 /* Query new route. */
David S. Miller6e869132011-05-06 16:18:04 -07001141 fl4 = &inet->cork.fl.u.ip4;
1142 rt = ip_route_connect(fl4, daddr, 0, RT_CONN_FLAGS(sk),
David S. Millerb23dd4f2011-03-02 14:31:35 -08001143 sk->sk_bound_dev_if, sk->sk_protocol,
1144 inet->inet_sport, inet->inet_dport, sk, false);
1145 if (IS_ERR(rt))
1146 return PTR_ERR(rt);
Arnaldo Carvalho de Melo32519f12005-08-09 19:50:02 -07001147
Changli Gaod8d1f302010-06-10 23:31:35 -07001148 sk_setup_caps(sk, &rt->dst);
Arnaldo Carvalho de Melo32519f12005-08-09 19:50:02 -07001149
David S. Miller6e869132011-05-06 16:18:04 -07001150 new_saddr = fl4->saddr;
Arnaldo Carvalho de Melo32519f12005-08-09 19:50:02 -07001151
1152 if (new_saddr == old_saddr)
1153 return 0;
1154
1155 if (sysctl_ip_dynaddr > 1) {
Joe Perches058bd4d2012-03-11 18:36:11 +00001156 pr_info("%s(): shifting inet->saddr from %pI4 to %pI4\n",
1157 __func__, &old_saddr, &new_saddr);
Arnaldo Carvalho de Melo32519f12005-08-09 19:50:02 -07001158 }
1159
Eric Dumazetc720c7e2009-10-15 06:30:45 +00001160 inet->inet_saddr = inet->inet_rcv_saddr = new_saddr;
Arnaldo Carvalho de Melo32519f12005-08-09 19:50:02 -07001161
1162 /*
1163 * XXX The only one ugly spot where we need to
1164 * XXX really change the sockets identity after
1165 * XXX it has entered the hashes. -DaveM
1166 *
1167 * Besides that, it does not check for connection
1168 * uniqueness. Wait for troubles.
1169 */
1170 __sk_prot_rehash(sk);
1171 return 0;
1172}
1173
1174int inet_sk_rebuild_header(struct sock *sk)
1175{
1176 struct inet_sock *inet = inet_sk(sk);
1177 struct rtable *rt = (struct rtable *)__sk_dst_check(sk, 0);
Al Viro3ca3c682006-09-27 18:28:07 -07001178 __be32 daddr;
Eric Dumazetf6d8bd02011-04-21 09:45:37 +00001179 struct ip_options_rcu *inet_opt;
David S. Miller6e869132011-05-06 16:18:04 -07001180 struct flowi4 *fl4;
Arnaldo Carvalho de Melo32519f12005-08-09 19:50:02 -07001181 int err;
1182
1183 /* Route is OK, nothing to do. */
1184 if (rt)
1185 return 0;
1186
1187 /* Reroute. */
Eric Dumazetf6d8bd02011-04-21 09:45:37 +00001188 rcu_read_lock();
1189 inet_opt = rcu_dereference(inet->inet_opt);
Eric Dumazetc720c7e2009-10-15 06:30:45 +00001190 daddr = inet->inet_daddr;
Eric Dumazetf6d8bd02011-04-21 09:45:37 +00001191 if (inet_opt && inet_opt->opt.srr)
1192 daddr = inet_opt->opt.faddr;
1193 rcu_read_unlock();
David S. Miller6e869132011-05-06 16:18:04 -07001194 fl4 = &inet->cork.fl.u.ip4;
1195 rt = ip_route_output_ports(sock_net(sk), fl4, sk, daddr, inet->inet_saddr,
David S. Miller78fbfd82011-03-12 00:00:52 -05001196 inet->inet_dport, inet->inet_sport,
1197 sk->sk_protocol, RT_CONN_FLAGS(sk),
1198 sk->sk_bound_dev_if);
David S. Millerb23dd4f2011-03-02 14:31:35 -08001199 if (!IS_ERR(rt)) {
1200 err = 0;
Changli Gaod8d1f302010-06-10 23:31:35 -07001201 sk_setup_caps(sk, &rt->dst);
David S. Millerb23dd4f2011-03-02 14:31:35 -08001202 } else {
1203 err = PTR_ERR(rt);
1204
Arnaldo Carvalho de Melo32519f12005-08-09 19:50:02 -07001205 /* Routing failed... */
1206 sk->sk_route_caps = 0;
1207 /*
1208 * Other protocols have to map its equivalent state to TCP_SYN_SENT.
1209 * DCCP maps its DCCP_REQUESTING state to TCP_SYN_SENT. -acme
1210 */
1211 if (!sysctl_ip_dynaddr ||
1212 sk->sk_state != TCP_SYN_SENT ||
1213 (sk->sk_userlocks & SOCK_BINDADDR_LOCK) ||
1214 (err = inet_sk_reselect_saddr(sk)) != 0)
1215 sk->sk_err_soft = -err;
1216 }
1217
1218 return err;
1219}
Arnaldo Carvalho de Melo32519f12005-08-09 19:50:02 -07001220EXPORT_SYMBOL(inet_sk_rebuild_header);
1221
Herbert Xua430a432006-07-08 13:34:56 -07001222static int inet_gso_send_check(struct sk_buff *skb)
1223{
Alexey Dobriyan32613092009-09-14 12:21:47 +00001224 const struct net_protocol *ops;
David S. Millerf9242b62012-06-19 18:56:21 -07001225 const struct iphdr *iph;
Herbert Xua430a432006-07-08 13:34:56 -07001226 int proto;
1227 int ihl;
1228 int err = -EINVAL;
1229
1230 if (unlikely(!pskb_may_pull(skb, sizeof(*iph))))
1231 goto out;
1232
Arnaldo Carvalho de Meloeddc9ec2007-04-20 22:47:35 -07001233 iph = ip_hdr(skb);
Herbert Xua430a432006-07-08 13:34:56 -07001234 ihl = iph->ihl * 4;
1235 if (ihl < sizeof(*iph))
1236 goto out;
1237
1238 if (unlikely(!pskb_may_pull(skb, ihl)))
1239 goto out;
1240
Arnaldo Carvalho de Melobadff6d2007-03-13 13:06:52 -03001241 __skb_pull(skb, ihl);
1242 skb_reset_transport_header(skb);
Arnaldo Carvalho de Meloeddc9ec2007-04-20 22:47:35 -07001243 iph = ip_hdr(skb);
David S. Millerf9242b62012-06-19 18:56:21 -07001244 proto = iph->protocol;
Herbert Xua430a432006-07-08 13:34:56 -07001245 err = -EPROTONOSUPPORT;
1246
1247 rcu_read_lock();
1248 ops = rcu_dereference(inet_protos[proto]);
1249 if (likely(ops && ops->gso_send_check))
1250 err = ops->gso_send_check(skb);
1251 rcu_read_unlock();
1252
1253out:
1254 return err;
1255}
1256
Michał Mirosławc8f44af2011-11-15 15:29:55 +00001257static struct sk_buff *inet_gso_segment(struct sk_buff *skb,
1258 netdev_features_t features)
Herbert Xuf4c50d92006-06-22 03:02:40 -07001259{
1260 struct sk_buff *segs = ERR_PTR(-EINVAL);
Alexey Dobriyan32613092009-09-14 12:21:47 +00001261 const struct net_protocol *ops;
David S. Millerf9242b62012-06-19 18:56:21 -07001262 struct iphdr *iph;
Herbert Xuf4c50d92006-06-22 03:02:40 -07001263 int proto;
1264 int ihl;
1265 int id;
Sridhar Samudralad7ca4cc2009-07-09 08:09:47 +00001266 unsigned int offset = 0;
Herbert Xuf4c50d92006-06-22 03:02:40 -07001267
Stephen Hemmingerd212f872007-06-27 00:47:37 -07001268 if (!(features & NETIF_F_V4_CSUM))
1269 features &= ~NETIF_F_SG;
1270
Herbert Xubbcf4672006-07-03 19:38:35 -07001271 if (unlikely(skb_shinfo(skb)->gso_type &
1272 ~(SKB_GSO_TCPV4 |
1273 SKB_GSO_UDP |
1274 SKB_GSO_DODGY |
1275 SKB_GSO_TCP_ECN |
1276 0)))
1277 goto out;
1278
1279 if (unlikely(!pskb_may_pull(skb, sizeof(*iph))))
Herbert Xuf4c50d92006-06-22 03:02:40 -07001280 goto out;
1281
Arnaldo Carvalho de Meloeddc9ec2007-04-20 22:47:35 -07001282 iph = ip_hdr(skb);
Herbert Xuf4c50d92006-06-22 03:02:40 -07001283 ihl = iph->ihl * 4;
1284 if (ihl < sizeof(*iph))
1285 goto out;
1286
Herbert Xubbcf4672006-07-03 19:38:35 -07001287 if (unlikely(!pskb_may_pull(skb, ihl)))
Herbert Xuf4c50d92006-06-22 03:02:40 -07001288 goto out;
1289
Arnaldo Carvalho de Melobadff6d2007-03-13 13:06:52 -03001290 __skb_pull(skb, ihl);
1291 skb_reset_transport_header(skb);
Arnaldo Carvalho de Meloeddc9ec2007-04-20 22:47:35 -07001292 iph = ip_hdr(skb);
Herbert Xuf4c50d92006-06-22 03:02:40 -07001293 id = ntohs(iph->id);
David S. Millerf9242b62012-06-19 18:56:21 -07001294 proto = iph->protocol;
Herbert Xuf4c50d92006-06-22 03:02:40 -07001295 segs = ERR_PTR(-EPROTONOSUPPORT);
1296
1297 rcu_read_lock();
1298 ops = rcu_dereference(inet_protos[proto]);
Herbert Xubbcf4672006-07-03 19:38:35 -07001299 if (likely(ops && ops->gso_segment))
Herbert Xu576a30e2006-06-27 13:22:38 -07001300 segs = ops->gso_segment(skb, features);
Herbert Xuf4c50d92006-06-22 03:02:40 -07001301 rcu_read_unlock();
1302
Hirofumi Nakagawa801678c2008-04-29 01:03:09 -07001303 if (!segs || IS_ERR(segs))
Herbert Xuf4c50d92006-06-22 03:02:40 -07001304 goto out;
1305
1306 skb = segs;
1307 do {
Arnaldo Carvalho de Meloeddc9ec2007-04-20 22:47:35 -07001308 iph = ip_hdr(skb);
Sridhar Samudralad7ca4cc2009-07-09 08:09:47 +00001309 if (proto == IPPROTO_UDP) {
1310 iph->id = htons(id);
1311 iph->frag_off = htons(offset >> 3);
1312 if (skb->next != NULL)
1313 iph->frag_off |= htons(IP_MF);
1314 offset += (skb->len - skb->mac_len - iph->ihl * 4);
1315 } else
1316 iph->id = htons(id++);
Herbert Xuf4c50d92006-06-22 03:02:40 -07001317 iph->tot_len = htons(skb->len - skb->mac_len);
1318 iph->check = 0;
Arnaldo Carvalho de Melod56f90a2007-04-10 20:50:43 -07001319 iph->check = ip_fast_csum(skb_network_header(skb), iph->ihl);
Herbert Xuf4c50d92006-06-22 03:02:40 -07001320 } while ((skb = skb->next));
1321
1322out:
1323 return segs;
1324}
1325
Herbert Xu73cc19f2008-12-15 23:41:09 -08001326static struct sk_buff **inet_gro_receive(struct sk_buff **head,
1327 struct sk_buff *skb)
1328{
Alexey Dobriyan32613092009-09-14 12:21:47 +00001329 const struct net_protocol *ops;
Herbert Xu73cc19f2008-12-15 23:41:09 -08001330 struct sk_buff **pp = NULL;
1331 struct sk_buff *p;
Eric Dumazetb71d1d42011-04-22 04:53:02 +00001332 const struct iphdr *iph;
Herbert Xua5b1cf22009-05-26 18:50:28 +00001333 unsigned int hlen;
1334 unsigned int off;
Herbert Xu1075f3f2009-05-26 18:50:29 +00001335 unsigned int id;
Herbert Xu73cc19f2008-12-15 23:41:09 -08001336 int flush = 1;
1337 int proto;
Herbert Xu73cc19f2008-12-15 23:41:09 -08001338
Herbert Xua5b1cf22009-05-26 18:50:28 +00001339 off = skb_gro_offset(skb);
1340 hlen = off + sizeof(*iph);
1341 iph = skb_gro_header_fast(skb, off);
1342 if (skb_gro_header_hard(skb, hlen)) {
1343 iph = skb_gro_header_slow(skb, hlen, off);
1344 if (unlikely(!iph))
1345 goto out;
1346 }
Herbert Xu73cc19f2008-12-15 23:41:09 -08001347
David S. Millerf9242b62012-06-19 18:56:21 -07001348 proto = iph->protocol;
Herbert Xu73cc19f2008-12-15 23:41:09 -08001349
1350 rcu_read_lock();
1351 ops = rcu_dereference(inet_protos[proto]);
1352 if (!ops || !ops->gro_receive)
1353 goto out_unlock;
1354
Herbert Xua5ad24b2009-02-08 18:00:39 +00001355 if (*(u8 *)iph != 0x45)
Herbert Xu73cc19f2008-12-15 23:41:09 -08001356 goto out_unlock;
1357
1358 if (unlikely(ip_fast_csum((u8 *)iph, iph->ihl)))
1359 goto out_unlock;
1360
Eric Dumazet0eae88f2010-04-20 19:06:52 -07001361 id = ntohl(*(__be32 *)&iph->id);
1362 flush = (u16)((ntohl(*(__be32 *)iph) ^ skb_gro_len(skb)) | (id ^ IP_DF));
Herbert Xu1075f3f2009-05-26 18:50:29 +00001363 id >>= 16;
Herbert Xu73cc19f2008-12-15 23:41:09 -08001364
1365 for (p = *head; p; p = p->next) {
1366 struct iphdr *iph2;
1367
1368 if (!NAPI_GRO_CB(p)->same_flow)
1369 continue;
1370
1371 iph2 = ip_hdr(p);
1372
Herbert Xua5ad24b2009-02-08 18:00:39 +00001373 if ((iph->protocol ^ iph2->protocol) |
1374 (iph->tos ^ iph2->tos) |
Eric Dumazet0eae88f2010-04-20 19:06:52 -07001375 ((__force u32)iph->saddr ^ (__force u32)iph2->saddr) |
1376 ((__force u32)iph->daddr ^ (__force u32)iph2->daddr)) {
Herbert Xu73cc19f2008-12-15 23:41:09 -08001377 NAPI_GRO_CB(p)->same_flow = 0;
1378 continue;
1379 }
1380
1381 /* All fields must match except length and checksum. */
1382 NAPI_GRO_CB(p)->flush |=
Herbert Xua5ad24b2009-02-08 18:00:39 +00001383 (iph->ttl ^ iph2->ttl) |
1384 ((u16)(ntohs(iph2->id) + NAPI_GRO_CB(p)->count) ^ id);
Herbert Xu73cc19f2008-12-15 23:41:09 -08001385
1386 NAPI_GRO_CB(p)->flush |= flush;
1387 }
1388
1389 NAPI_GRO_CB(skb)->flush |= flush;
Herbert Xu86911732009-01-29 14:19:50 +00001390 skb_gro_pull(skb, sizeof(*iph));
1391 skb_set_transport_header(skb, skb_gro_offset(skb));
Herbert Xu73cc19f2008-12-15 23:41:09 -08001392
1393 pp = ops->gro_receive(head, skb);
1394
1395out_unlock:
1396 rcu_read_unlock();
1397
1398out:
1399 NAPI_GRO_CB(skb)->flush |= flush;
1400
1401 return pp;
1402}
1403
1404static int inet_gro_complete(struct sk_buff *skb)
1405{
Herbert Xu73cc19f2008-12-15 23:41:09 -08001406 __be16 newlen = htons(skb->len - skb_network_offset(skb));
David S. Millerf9242b62012-06-19 18:56:21 -07001407 struct iphdr *iph = ip_hdr(skb);
1408 const struct net_protocol *ops;
1409 int proto = iph->protocol;
1410 int err = -ENOSYS;
Herbert Xu73cc19f2008-12-15 23:41:09 -08001411
1412 csum_replace2(&iph->check, iph->tot_len, newlen);
1413 iph->tot_len = newlen;
1414
1415 rcu_read_lock();
1416 ops = rcu_dereference(inet_protos[proto]);
1417 if (WARN_ON(!ops || !ops->gro_complete))
1418 goto out_unlock;
1419
1420 err = ops->gro_complete(skb);
1421
1422out_unlock:
1423 rcu_read_unlock();
1424
1425 return err;
1426}
1427
Denis V. Luneveee4fe42008-04-03 14:27:58 -07001428int inet_ctl_sock_create(struct sock **sk, unsigned short family,
Denis V. Lunev56772422008-04-03 14:28:30 -07001429 unsigned short type, unsigned char protocol,
1430 struct net *net)
Denis V. Lunev3d58b5f2008-04-03 14:22:32 -07001431{
Denis V. Luneveee4fe42008-04-03 14:27:58 -07001432 struct socket *sock;
1433 int rc = sock_create_kern(family, type, protocol, &sock);
Denis V. Lunev3d58b5f2008-04-03 14:22:32 -07001434
1435 if (rc == 0) {
Denis V. Luneveee4fe42008-04-03 14:27:58 -07001436 *sk = sock->sk;
1437 (*sk)->sk_allocation = GFP_ATOMIC;
Denis V. Lunev3d58b5f2008-04-03 14:22:32 -07001438 /*
1439 * Unhash it so that IP input processing does not even see it,
1440 * we do not wish this socket to see incoming packets.
1441 */
Denis V. Luneveee4fe42008-04-03 14:27:58 -07001442 (*sk)->sk_prot->unhash(*sk);
Denis V. Lunev56772422008-04-03 14:28:30 -07001443
1444 sk_change_net(*sk, net);
Denis V. Lunev3d58b5f2008-04-03 14:22:32 -07001445 }
1446 return rc;
1447}
Denis V. Lunev3d58b5f2008-04-03 14:22:32 -07001448EXPORT_SYMBOL_GPL(inet_ctl_sock_create);
1449
Tejun Heo7d720c32010-02-16 15:20:26 +00001450unsigned long snmp_fold_field(void __percpu *mib[], int offt)
Herbert Xu5e0f0432007-04-24 21:53:35 -07001451{
1452 unsigned long res = 0;
Eric Dumazet8f0ea0f2011-06-10 19:45:51 +00001453 int i, j;
Herbert Xu5e0f0432007-04-24 21:53:35 -07001454
1455 for_each_possible_cpu(i) {
Eric Dumazet8f0ea0f2011-06-10 19:45:51 +00001456 for (j = 0; j < SNMP_ARRAY_SZ; j++)
1457 res += *(((unsigned long *) per_cpu_ptr(mib[j], i)) + offt);
Herbert Xu5e0f0432007-04-24 21:53:35 -07001458 }
1459 return res;
1460}
1461EXPORT_SYMBOL_GPL(snmp_fold_field);
1462
Eric Dumazet4ce3c182010-06-30 13:31:19 -07001463#if BITS_PER_LONG==32
1464
1465u64 snmp_fold_field64(void __percpu *mib[], int offt, size_t syncp_offset)
1466{
1467 u64 res = 0;
1468 int cpu;
1469
1470 for_each_possible_cpu(cpu) {
Eric Dumazet8f0ea0f2011-06-10 19:45:51 +00001471 void *bhptr;
Eric Dumazet4ce3c182010-06-30 13:31:19 -07001472 struct u64_stats_sync *syncp;
Eric Dumazet8f0ea0f2011-06-10 19:45:51 +00001473 u64 v;
Eric Dumazet4ce3c182010-06-30 13:31:19 -07001474 unsigned int start;
1475
Eric Dumazet8f0ea0f2011-06-10 19:45:51 +00001476 bhptr = per_cpu_ptr(mib[0], cpu);
Eric Dumazet4ce3c182010-06-30 13:31:19 -07001477 syncp = (struct u64_stats_sync *)(bhptr + syncp_offset);
1478 do {
1479 start = u64_stats_fetch_begin_bh(syncp);
Eric Dumazet8f0ea0f2011-06-10 19:45:51 +00001480 v = *(((u64 *) bhptr) + offt);
Eric Dumazet4ce3c182010-06-30 13:31:19 -07001481 } while (u64_stats_fetch_retry_bh(syncp, start));
1482
Eric Dumazet8f0ea0f2011-06-10 19:45:51 +00001483 res += v;
Eric Dumazet4ce3c182010-06-30 13:31:19 -07001484 }
1485 return res;
1486}
1487EXPORT_SYMBOL_GPL(snmp_fold_field64);
1488#endif
1489
Eric Dumazet1823e4c82010-06-22 20:58:41 +00001490int snmp_mib_init(void __percpu *ptr[2], size_t mibsize, size_t align)
Herbert Xu5e0f0432007-04-24 21:53:35 -07001491{
1492 BUG_ON(ptr == NULL);
Eric Dumazet1823e4c82010-06-22 20:58:41 +00001493 ptr[0] = __alloc_percpu(mibsize, align);
Herbert Xu5e0f0432007-04-24 21:53:35 -07001494 if (!ptr[0])
Eric Dumazet8f0ea0f2011-06-10 19:45:51 +00001495 return -ENOMEM;
1496#if SNMP_ARRAY_SZ == 2
Eric Dumazet1823e4c82010-06-22 20:58:41 +00001497 ptr[1] = __alloc_percpu(mibsize, align);
Eric Dumazet8f0ea0f2011-06-10 19:45:51 +00001498 if (!ptr[1]) {
1499 free_percpu(ptr[0]);
1500 ptr[0] = NULL;
1501 return -ENOMEM;
1502 }
1503#endif
Herbert Xu5e0f0432007-04-24 21:53:35 -07001504 return 0;
Herbert Xu5e0f0432007-04-24 21:53:35 -07001505}
1506EXPORT_SYMBOL_GPL(snmp_mib_init);
1507
Eric Dumazet8f0ea0f2011-06-10 19:45:51 +00001508void snmp_mib_free(void __percpu *ptr[SNMP_ARRAY_SZ])
Herbert Xu5e0f0432007-04-24 21:53:35 -07001509{
Eric Dumazet8f0ea0f2011-06-10 19:45:51 +00001510 int i;
1511
Herbert Xu5e0f0432007-04-24 21:53:35 -07001512 BUG_ON(ptr == NULL);
Eric Dumazet8f0ea0f2011-06-10 19:45:51 +00001513 for (i = 0; i < SNMP_ARRAY_SZ; i++) {
1514 free_percpu(ptr[i]);
1515 ptr[i] = NULL;
1516 }
Herbert Xu5e0f0432007-04-24 21:53:35 -07001517}
1518EXPORT_SYMBOL_GPL(snmp_mib_free);
1519
Linus Torvalds1da177e2005-04-16 15:20:36 -07001520#ifdef CONFIG_IP_MULTICAST
Alexey Dobriyan32613092009-09-14 12:21:47 +00001521static const struct net_protocol igmp_protocol = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001522 .handler = igmp_rcv,
Alexey Dobriyanb4ee07d2008-12-25 16:42:23 -08001523 .netns_ok = 1,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001524};
1525#endif
1526
Alexey Dobriyan32613092009-09-14 12:21:47 +00001527static const struct net_protocol tcp_protocol = {
David S. Miller41063e92012-06-19 21:22:05 -07001528 .early_demux = tcp_v4_early_demux,
1529 .handler = tcp_v4_rcv,
1530 .err_handler = tcp_v4_err,
1531 .gso_send_check = tcp_v4_gso_send_check,
1532 .gso_segment = tcp_tso_segment,
1533 .gro_receive = tcp4_gro_receive,
1534 .gro_complete = tcp4_gro_complete,
1535 .no_policy = 1,
1536 .netns_ok = 1,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001537};
1538
Alexey Dobriyan32613092009-09-14 12:21:47 +00001539static const struct net_protocol udp_protocol = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001540 .handler = udp_rcv,
1541 .err_handler = udp_err,
Sridhar Samudralad7ca4cc2009-07-09 08:09:47 +00001542 .gso_send_check = udp4_ufo_send_check,
1543 .gso_segment = udp4_ufo_fragment,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001544 .no_policy = 1,
Denis V. Lunev92f1fec2008-03-24 15:34:06 -07001545 .netns_ok = 1,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001546};
1547
Alexey Dobriyan32613092009-09-14 12:21:47 +00001548static const struct net_protocol icmp_protocol = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001549 .handler = icmp_rcv,
Vasiliy Kulikovc319b4d2011-05-13 10:01:00 +00001550 .err_handler = ping_err,
Herbert Xu8b7817f2007-12-12 10:44:43 -08001551 .no_policy = 1,
Denis V. Lunev92f1fec2008-03-24 15:34:06 -07001552 .netns_ok = 1,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001553};
1554
Pavel Emelyanov9b4661b2008-07-18 04:01:44 -07001555static __net_init int ipv4_mib_init_net(struct net *net)
1556{
Tejun Heo7d720c32010-02-16 15:20:26 +00001557 if (snmp_mib_init((void __percpu **)net->mib.tcp_statistics,
Eric Dumazet1823e4c82010-06-22 20:58:41 +00001558 sizeof(struct tcp_mib),
1559 __alignof__(struct tcp_mib)) < 0)
Pavel Emelyanov57ef42d2008-07-18 04:02:08 -07001560 goto err_tcp_mib;
Tejun Heo7d720c32010-02-16 15:20:26 +00001561 if (snmp_mib_init((void __percpu **)net->mib.ip_statistics,
Eric Dumazet1823e4c82010-06-22 20:58:41 +00001562 sizeof(struct ipstats_mib),
1563 __alignof__(struct ipstats_mib)) < 0)
Pavel Emelyanova20f5792008-07-18 04:02:42 -07001564 goto err_ip_mib;
Tejun Heo7d720c32010-02-16 15:20:26 +00001565 if (snmp_mib_init((void __percpu **)net->mib.net_statistics,
Eric Dumazet1823e4c82010-06-22 20:58:41 +00001566 sizeof(struct linux_mib),
1567 __alignof__(struct linux_mib)) < 0)
Pavel Emelyanov61a7e262008-07-18 04:03:08 -07001568 goto err_net_mib;
Tejun Heo7d720c32010-02-16 15:20:26 +00001569 if (snmp_mib_init((void __percpu **)net->mib.udp_statistics,
Eric Dumazet1823e4c82010-06-22 20:58:41 +00001570 sizeof(struct udp_mib),
1571 __alignof__(struct udp_mib)) < 0)
Pavel Emelyanov2f275f92008-07-18 04:03:27 -07001572 goto err_udp_mib;
Tejun Heo7d720c32010-02-16 15:20:26 +00001573 if (snmp_mib_init((void __percpu **)net->mib.udplite_statistics,
Eric Dumazet1823e4c82010-06-22 20:58:41 +00001574 sizeof(struct udp_mib),
1575 __alignof__(struct udp_mib)) < 0)
Pavel Emelyanov386019d2008-07-18 04:03:45 -07001576 goto err_udplite_mib;
Tejun Heo7d720c32010-02-16 15:20:26 +00001577 if (snmp_mib_init((void __percpu **)net->mib.icmp_statistics,
Eric Dumazet1823e4c82010-06-22 20:58:41 +00001578 sizeof(struct icmp_mib),
1579 __alignof__(struct icmp_mib)) < 0)
Pavel Emelyanovb60538a2008-07-18 04:04:02 -07001580 goto err_icmp_mib;
Eric Dumazetacb32ba2011-11-08 13:04:43 +00001581 net->mib.icmpmsg_statistics = kzalloc(sizeof(struct icmpmsg_mib),
1582 GFP_KERNEL);
1583 if (!net->mib.icmpmsg_statistics)
Pavel Emelyanov923c6582008-07-18 04:04:22 -07001584 goto err_icmpmsg_mib;
Pavel Emelyanov57ef42d2008-07-18 04:02:08 -07001585
1586 tcp_mib_init(net);
Pavel Emelyanov9b4661b2008-07-18 04:01:44 -07001587 return 0;
Pavel Emelyanov57ef42d2008-07-18 04:02:08 -07001588
Pavel Emelyanov923c6582008-07-18 04:04:22 -07001589err_icmpmsg_mib:
Tejun Heo7d720c32010-02-16 15:20:26 +00001590 snmp_mib_free((void __percpu **)net->mib.icmp_statistics);
Pavel Emelyanovb60538a2008-07-18 04:04:02 -07001591err_icmp_mib:
Tejun Heo7d720c32010-02-16 15:20:26 +00001592 snmp_mib_free((void __percpu **)net->mib.udplite_statistics);
Pavel Emelyanov386019d2008-07-18 04:03:45 -07001593err_udplite_mib:
Tejun Heo7d720c32010-02-16 15:20:26 +00001594 snmp_mib_free((void __percpu **)net->mib.udp_statistics);
Pavel Emelyanov2f275f92008-07-18 04:03:27 -07001595err_udp_mib:
Tejun Heo7d720c32010-02-16 15:20:26 +00001596 snmp_mib_free((void __percpu **)net->mib.net_statistics);
Pavel Emelyanov61a7e262008-07-18 04:03:08 -07001597err_net_mib:
Tejun Heo7d720c32010-02-16 15:20:26 +00001598 snmp_mib_free((void __percpu **)net->mib.ip_statistics);
Pavel Emelyanova20f5792008-07-18 04:02:42 -07001599err_ip_mib:
Tejun Heo7d720c32010-02-16 15:20:26 +00001600 snmp_mib_free((void __percpu **)net->mib.tcp_statistics);
Pavel Emelyanov57ef42d2008-07-18 04:02:08 -07001601err_tcp_mib:
1602 return -ENOMEM;
Pavel Emelyanov9b4661b2008-07-18 04:01:44 -07001603}
1604
1605static __net_exit void ipv4_mib_exit_net(struct net *net)
1606{
Eric Dumazetacb32ba2011-11-08 13:04:43 +00001607 kfree(net->mib.icmpmsg_statistics);
Tejun Heo7d720c32010-02-16 15:20:26 +00001608 snmp_mib_free((void __percpu **)net->mib.icmp_statistics);
1609 snmp_mib_free((void __percpu **)net->mib.udplite_statistics);
1610 snmp_mib_free((void __percpu **)net->mib.udp_statistics);
1611 snmp_mib_free((void __percpu **)net->mib.net_statistics);
1612 snmp_mib_free((void __percpu **)net->mib.ip_statistics);
1613 snmp_mib_free((void __percpu **)net->mib.tcp_statistics);
Pavel Emelyanov9b4661b2008-07-18 04:01:44 -07001614}
1615
1616static __net_initdata struct pernet_operations ipv4_mib_ops = {
1617 .init = ipv4_mib_init_net,
1618 .exit = ipv4_mib_exit_net,
1619};
1620
Linus Torvalds1da177e2005-04-16 15:20:36 -07001621static int __init init_ipv4_mibs(void)
1622{
Pavel Emelyanovd89cbbb2008-07-18 04:04:51 -07001623 return register_pernet_subsys(&ipv4_mib_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001624}
1625
1626static int ipv4_proc_init(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001627
Herbert Xu30e224d2005-07-05 14:40:10 -07001628/*
1629 * IP protocol layer initialiser
1630 */
1631
Stephen Hemminger7546dd92009-03-09 08:18:29 +00001632static struct packet_type ip_packet_type __read_mostly = {
Harvey Harrison09640e62009-02-01 00:45:17 -08001633 .type = cpu_to_be16(ETH_P_IP),
Herbert Xu30e224d2005-07-05 14:40:10 -07001634 .func = ip_rcv,
Herbert Xua430a432006-07-08 13:34:56 -07001635 .gso_send_check = inet_gso_send_check,
Herbert Xuf4c50d92006-06-22 03:02:40 -07001636 .gso_segment = inet_gso_segment,
Herbert Xu73cc19f2008-12-15 23:41:09 -08001637 .gro_receive = inet_gro_receive,
1638 .gro_complete = inet_gro_complete,
Herbert Xu30e224d2005-07-05 14:40:10 -07001639};
1640
Linus Torvalds1da177e2005-04-16 15:20:36 -07001641static int __init inet_init(void)
1642{
1643 struct sk_buff *dummy_skb;
1644 struct inet_protosw *q;
1645 struct list_head *r;
1646 int rc = -EINVAL;
1647
YOSHIFUJI Hideakief047f52006-09-01 00:29:06 -07001648 BUILD_BUG_ON(sizeof(struct inet_skb_parm) > sizeof(dummy_skb->cb));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001649
Amerigo Wange3826f12010-05-05 00:27:06 +00001650 sysctl_local_reserved_ports = kzalloc(65536 / 8, GFP_KERNEL);
1651 if (!sysctl_local_reserved_ports)
1652 goto out;
1653
Linus Torvalds1da177e2005-04-16 15:20:36 -07001654 rc = proto_register(&tcp_prot, 1);
1655 if (rc)
Amerigo Wange3826f12010-05-05 00:27:06 +00001656 goto out_free_reserved_ports;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001657
1658 rc = proto_register(&udp_prot, 1);
1659 if (rc)
1660 goto out_unregister_tcp_proto;
1661
1662 rc = proto_register(&raw_prot, 1);
1663 if (rc)
1664 goto out_unregister_udp_proto;
1665
Vasiliy Kulikovc319b4d2011-05-13 10:01:00 +00001666 rc = proto_register(&ping_prot, 1);
1667 if (rc)
1668 goto out_unregister_raw_proto;
1669
Linus Torvalds1da177e2005-04-16 15:20:36 -07001670 /*
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +09001671 * Tell SOCKET that we are alive...
Linus Torvalds1da177e2005-04-16 15:20:36 -07001672 */
1673
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +09001674 (void)sock_register(&inet_family_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001675
Al Virobd7b1532008-07-15 16:00:59 -04001676#ifdef CONFIG_SYSCTL
1677 ip_static_sysctl_init();
1678#endif
1679
Glauber Costa3dc43e32011-12-11 21:47:05 +00001680 tcp_prot.sysctl_mem = init_net.ipv4.sysctl_tcp_mem;
1681
Linus Torvalds1da177e2005-04-16 15:20:36 -07001682 /*
1683 * Add all the base protocols.
1684 */
1685
1686 if (inet_add_protocol(&icmp_protocol, IPPROTO_ICMP) < 0)
Joe Perches058bd4d2012-03-11 18:36:11 +00001687 pr_crit("%s: Cannot add ICMP protocol\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001688 if (inet_add_protocol(&udp_protocol, IPPROTO_UDP) < 0)
Joe Perches058bd4d2012-03-11 18:36:11 +00001689 pr_crit("%s: Cannot add UDP protocol\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001690 if (inet_add_protocol(&tcp_protocol, IPPROTO_TCP) < 0)
Joe Perches058bd4d2012-03-11 18:36:11 +00001691 pr_crit("%s: Cannot add TCP protocol\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001692#ifdef CONFIG_IP_MULTICAST
1693 if (inet_add_protocol(&igmp_protocol, IPPROTO_IGMP) < 0)
Joe Perches058bd4d2012-03-11 18:36:11 +00001694 pr_crit("%s: Cannot add IGMP protocol\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001695#endif
1696
1697 /* Register the socket-side information for inet_create. */
1698 for (r = &inetsw[0]; r < &inetsw[SOCK_MAX]; ++r)
1699 INIT_LIST_HEAD(r);
1700
1701 for (q = inetsw_array; q < &inetsw_array[INETSW_ARRAY_LEN]; ++q)
1702 inet_register_protosw(q);
1703
1704 /*
1705 * Set the ARP module up
1706 */
1707
1708 arp_init();
1709
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +09001710 /*
1711 * Set the IP module up
1712 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001713
1714 ip_init();
1715
Denis V. Lunev9b0f9762008-02-29 11:13:15 -08001716 tcp_v4_init();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001717
1718 /* Setup TCP slab cache for open requests. */
1719 tcp_init();
1720
Hideo Aoki95766ff2007-12-31 00:29:24 -08001721 /* Setup UDP memory threshold */
1722 udp_init();
1723
Gerrit Renkerba4e58e2006-11-27 11:10:57 -08001724 /* Add UDP-Lite (RFC 3828) */
1725 udplite4_register();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001726
Vasiliy Kulikovc319b4d2011-05-13 10:01:00 +00001727 ping_init();
1728
Linus Torvalds1da177e2005-04-16 15:20:36 -07001729 /*
1730 * Set the ICMP layer up
1731 */
1732
Denis V. Luneva5710d62008-02-29 11:14:50 -08001733 if (icmp_init() < 0)
1734 panic("Failed to create the ICMP control socket.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001735
1736 /*
1737 * Initialise the multicast router
1738 */
1739#if defined(CONFIG_IP_MROUTE)
Wang Chen03d2f892008-07-03 12:13:36 +08001740 if (ip_mr_init())
Joe Perches058bd4d2012-03-11 18:36:11 +00001741 pr_crit("%s: Cannot init ipv4 mroute\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001742#endif
1743 /*
1744 * Initialise per-cpu ipv4 mibs
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +09001745 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001746
Stephen Hemminger132adf52007-03-08 20:44:43 -08001747 if (init_ipv4_mibs())
Joe Perches058bd4d2012-03-11 18:36:11 +00001748 pr_crit("%s: Cannot init ipv4 mibs\n", __func__);
YOSHIFUJI Hideakie905a9e2007-02-09 23:24:47 +09001749
Linus Torvalds1da177e2005-04-16 15:20:36 -07001750 ipv4_proc_init();
1751
1752 ipfrag_init();
1753
Herbert Xu30e224d2005-07-05 14:40:10 -07001754 dev_add_pack(&ip_packet_type);
1755
Linus Torvalds1da177e2005-04-16 15:20:36 -07001756 rc = 0;
1757out:
1758 return rc;
Vasiliy Kulikovc319b4d2011-05-13 10:01:00 +00001759out_unregister_raw_proto:
1760 proto_unregister(&raw_prot);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001761out_unregister_udp_proto:
1762 proto_unregister(&udp_prot);
Olaf Kirch321efff2006-09-27 16:33:45 -07001763out_unregister_tcp_proto:
1764 proto_unregister(&tcp_prot);
Amerigo Wange3826f12010-05-05 00:27:06 +00001765out_free_reserved_ports:
1766 kfree(sysctl_local_reserved_ports);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001767 goto out;
1768}
1769
Heiko Carstensa536e072006-04-28 15:19:17 -07001770fs_initcall(inet_init);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001771
1772/* ------------------------------------------------------------------------ */
1773
1774#ifdef CONFIG_PROC_FS
Linus Torvalds1da177e2005-04-16 15:20:36 -07001775static int __init ipv4_proc_init(void)
1776{
1777 int rc = 0;
1778
1779 if (raw_proc_init())
1780 goto out_raw;
1781 if (tcp4_proc_init())
1782 goto out_tcp;
1783 if (udp4_proc_init())
1784 goto out_udp;
Vasiliy Kulikovc319b4d2011-05-13 10:01:00 +00001785 if (ping_proc_init())
1786 goto out_ping;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001787 if (ip_misc_proc_init())
1788 goto out_misc;
1789out:
1790 return rc;
1791out_misc:
Vasiliy Kulikovc319b4d2011-05-13 10:01:00 +00001792 ping_proc_exit();
1793out_ping:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001794 udp4_proc_exit();
1795out_udp:
1796 tcp4_proc_exit();
1797out_tcp:
1798 raw_proc_exit();
1799out_raw:
1800 rc = -ENOMEM;
1801 goto out;
1802}
1803
1804#else /* CONFIG_PROC_FS */
1805static int __init ipv4_proc_init(void)
1806{
1807 return 0;
1808}
1809#endif /* CONFIG_PROC_FS */
1810
1811MODULE_ALIAS_NETPROTO(PF_INET);
1812