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Vlad Yasevich60c778b2008-01-11 09:57:09 -05001/* SCTP kernel implementation
Linus Torvalds1da177e2005-04-16 15:20:36 -07002 * (C) Copyright IBM Corp. 2001, 2004
3 * Copyright (c) 1999-2000 Cisco, Inc.
4 * Copyright (c) 1999-2001 Motorola, Inc.
5 * Copyright (c) 2001 Intel Corp.
6 * Copyright (c) 2001 Nokia, Inc.
7 * Copyright (c) 2001 La Monte H.P. Yarroll
8 *
Vlad Yasevich60c778b2008-01-11 09:57:09 -05009 * This file is part of the SCTP kernel implementation
Linus Torvalds1da177e2005-04-16 15:20:36 -070010 *
11 * Initialization/cleanup for SCTP protocol support.
12 *
Vlad Yasevich60c778b2008-01-11 09:57:09 -050013 * This SCTP implementation is free software;
Linus Torvalds1da177e2005-04-16 15:20:36 -070014 * you can redistribute it and/or modify it under the terms of
15 * the GNU General Public License as published by
16 * the Free Software Foundation; either version 2, or (at your option)
17 * any later version.
18 *
Vlad Yasevich60c778b2008-01-11 09:57:09 -050019 * This SCTP implementation is distributed in the hope that it
Linus Torvalds1da177e2005-04-16 15:20:36 -070020 * will be useful, but WITHOUT ANY WARRANTY; without even the implied
21 * ************************
22 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
23 * See the GNU General Public License for more details.
24 *
25 * You should have received a copy of the GNU General Public License
26 * along with GNU CC; see the file COPYING. If not, write to
27 * the Free Software Foundation, 59 Temple Place - Suite 330,
28 * Boston, MA 02111-1307, USA.
29 *
30 * Please send any bug reports or fixes you make to the
31 * email address(es):
32 * lksctp developers <lksctp-developers@lists.sourceforge.net>
33 *
34 * Or submit a bug report through the following website:
35 * http://www.sf.net/projects/lksctp
36 *
37 * Written or modified by:
38 * La Monte H.P. Yarroll <piggy@acm.org>
39 * Karl Knutson <karl@athena.chicago.il.us>
40 * Jon Grimm <jgrimm@us.ibm.com>
41 * Sridhar Samudrala <sri@us.ibm.com>
42 * Daisy Chang <daisyc@us.ibm.com>
43 * Ardelle Fan <ardelle.fan@intel.com>
44 *
45 * Any bugs reported given to us we will try to fix... any fixes shared will
46 * be incorporated into the next SCTP release.
47 */
48
49#include <linux/module.h>
50#include <linux/init.h>
51#include <linux/netdevice.h>
52#include <linux/inetdevice.h>
53#include <linux/seq_file.h>
Neil Horman4d93df02007-08-15 16:07:44 -070054#include <linux/bootmem.h>
Vlad Yasevich845525a2008-07-18 23:08:21 -070055#include <linux/highmem.h>
56#include <linux/swap.h>
Eric W. Biederman457c4cb2007-09-12 12:01:34 +020057#include <net/net_namespace.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070058#include <net/protocol.h>
59#include <net/ip.h>
60#include <net/ipv6.h>
Arnaldo Carvalho de Melo14c85022005-12-27 02:43:12 -020061#include <net/route.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070062#include <net/sctp/sctp.h>
63#include <net/addrconf.h>
64#include <net/inet_common.h>
65#include <net/inet_ecn.h>
66
67/* Global data structures. */
Brian Haley4cbf1ca2006-09-18 00:04:22 -070068struct sctp_globals sctp_globals __read_mostly;
Eric Dumazetba899662005-08-26 12:05:31 -070069DEFINE_SNMP_STAT(struct sctp_mib, sctp_statistics) __read_mostly;
Linus Torvalds1da177e2005-04-16 15:20:36 -070070
Florian Westphalc4e85f82008-07-18 23:03:44 -070071#ifdef CONFIG_PROC_FS
72struct proc_dir_entry *proc_net_sctp;
73#endif
74
Linus Torvalds1da177e2005-04-16 15:20:36 -070075struct idr sctp_assocs_id;
76DEFINE_SPINLOCK(sctp_assocs_id_lock);
77
78/* This is the global socket data structure used for responding to
79 * the Out-of-the-blue (OOTB) packets. A control sock will be created
80 * for this socket at the initialization time.
81 */
Denis V. Lunev82581752008-04-03 14:27:26 -070082static struct sock *sctp_ctl_sock;
Linus Torvalds1da177e2005-04-16 15:20:36 -070083
84static struct sctp_pf *sctp_pf_inet6_specific;
85static struct sctp_pf *sctp_pf_inet_specific;
86static struct sctp_af *sctp_af_v4_specific;
87static struct sctp_af *sctp_af_v6_specific;
88
Christoph Lametere18b8902006-12-06 20:33:20 -080089struct kmem_cache *sctp_chunk_cachep __read_mostly;
90struct kmem_cache *sctp_bucket_cachep __read_mostly;
Linus Torvalds1da177e2005-04-16 15:20:36 -070091
Vlad Yasevich007e3932007-09-16 16:04:37 -070092int sysctl_sctp_mem[3];
93int sysctl_sctp_rmem[3];
94int sysctl_sctp_wmem[3];
Neil Horman4d93df02007-08-15 16:07:44 -070095
Linus Torvalds1da177e2005-04-16 15:20:36 -070096/* Return the address of the control sock. */
97struct sock *sctp_get_ctl_sock(void)
98{
Denis V. Lunev82581752008-04-03 14:27:26 -070099 return sctp_ctl_sock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100}
101
102/* Set up the proc fs entry for the SCTP protocol. */
103static __init int sctp_proc_init(void)
104{
Eric Dumazet17483762008-11-25 21:16:35 -0800105 if (percpu_counter_init(&sctp_sockets_allocated, 0))
106 goto out_nomem;
Florian Westphalc4e85f82008-07-18 23:03:44 -0700107#ifdef CONFIG_PROC_FS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108 if (!proc_net_sctp) {
109 struct proc_dir_entry *ent;
Eric W. Biederman457c4cb2007-09-12 12:01:34 +0200110 ent = proc_mkdir("sctp", init_net.proc_net);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111 if (ent) {
112 ent->owner = THIS_MODULE;
113 proc_net_sctp = ent;
114 } else
Eric Dumazet17483762008-11-25 21:16:35 -0800115 goto out_free_percpu;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116 }
117
118 if (sctp_snmp_proc_init())
Wei Yongjun80896a32008-06-16 16:59:55 -0700119 goto out_snmp_proc_init;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120 if (sctp_eps_proc_init())
Wei Yongjun80896a32008-06-16 16:59:55 -0700121 goto out_eps_proc_init;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122 if (sctp_assocs_proc_init())
Wei Yongjun80896a32008-06-16 16:59:55 -0700123 goto out_assocs_proc_init;
Neil Horman20c2c1f2008-05-09 15:14:50 -0700124 if (sctp_remaddr_proc_init())
David S. Millercaea9022008-06-16 18:25:48 -0700125 goto out_remaddr_proc_init;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126
127 return 0;
128
David S. Millercaea9022008-06-16 18:25:48 -0700129out_remaddr_proc_init:
Pavel Emelyanov3d00fb92008-06-17 15:54:14 -0700130 sctp_assocs_proc_exit();
Wei Yongjun80896a32008-06-16 16:59:55 -0700131out_assocs_proc_init:
132 sctp_eps_proc_exit();
133out_eps_proc_init:
134 sctp_snmp_proc_exit();
135out_snmp_proc_init:
136 if (proc_net_sctp) {
137 proc_net_sctp = NULL;
138 remove_proc_entry("sctp", init_net.proc_net);
139 }
Eric Dumazet17483762008-11-25 21:16:35 -0800140out_free_percpu:
141 percpu_counter_destroy(&sctp_sockets_allocated);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142out_nomem:
143 return -ENOMEM;
Florian Westphalc4e85f82008-07-18 23:03:44 -0700144#else
145 return 0;
146#endif /* CONFIG_PROC_FS */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147}
148
YOSHIFUJI Hideakid808ad92007-02-09 23:25:18 +0900149/* Clean up the proc fs entry for the SCTP protocol.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150 * Note: Do not make this __exit as it is used in the init error
151 * path.
152 */
153static void sctp_proc_exit(void)
154{
Florian Westphalc4e85f82008-07-18 23:03:44 -0700155#ifdef CONFIG_PROC_FS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156 sctp_snmp_proc_exit();
157 sctp_eps_proc_exit();
158 sctp_assocs_proc_exit();
Neil Horman20c2c1f2008-05-09 15:14:50 -0700159 sctp_remaddr_proc_exit();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160
161 if (proc_net_sctp) {
162 proc_net_sctp = NULL;
Eric W. Biederman457c4cb2007-09-12 12:01:34 +0200163 remove_proc_entry("sctp", init_net.proc_net);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164 }
Florian Westphalc4e85f82008-07-18 23:03:44 -0700165#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166}
167
168/* Private helper to extract ipv4 address and stash them in
169 * the protocol structure.
170 */
171static void sctp_v4_copy_addrlist(struct list_head *addrlist,
172 struct net_device *dev)
173{
174 struct in_device *in_dev;
175 struct in_ifaddr *ifa;
176 struct sctp_sockaddr_entry *addr;
177
178 rcu_read_lock();
Herbert Xue5ed6392005-10-03 14:35:55 -0700179 if ((in_dev = __in_dev_get_rcu(dev)) == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180 rcu_read_unlock();
181 return;
182 }
183
184 for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
185 /* Add the address to the local list. */
186 addr = t_new(struct sctp_sockaddr_entry, GFP_ATOMIC);
187 if (addr) {
Al Viro2a6fd782006-11-20 17:04:42 -0800188 addr->a.v4.sin_family = AF_INET;
189 addr->a.v4.sin_port = 0;
190 addr->a.v4.sin_addr.s_addr = ifa->ifa_local;
Vlad Yasevich29303542007-09-16 16:02:12 -0700191 addr->valid = 1;
192 INIT_LIST_HEAD(&addr->list);
193 INIT_RCU_HEAD(&addr->rcu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194 list_add_tail(&addr->list, addrlist);
195 }
196 }
197
198 rcu_read_unlock();
199}
200
201/* Extract our IP addresses from the system and stash them in the
202 * protocol structure.
203 */
Sridhar Samudrala29c7cf92006-12-13 16:26:26 -0800204static void sctp_get_local_addr_list(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205{
206 struct net_device *dev;
207 struct list_head *pos;
208 struct sctp_af *af;
209
210 read_lock(&dev_base_lock);
Eric W. Biederman881d9662007-09-17 11:56:21 -0700211 for_each_netdev(&init_net, dev) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212 __list_for_each(pos, &sctp_address_families) {
213 af = list_entry(pos, struct sctp_af, list);
214 af->copy_addrlist(&sctp_local_addr_list, dev);
215 }
216 }
217 read_unlock(&dev_base_lock);
218}
219
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220/* Free the existing local addresses. */
Sridhar Samudrala29c7cf92006-12-13 16:26:26 -0800221static void sctp_free_local_addr_list(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222{
223 struct sctp_sockaddr_entry *addr;
224 struct list_head *pos, *temp;
225
226 list_for_each_safe(pos, temp, &sctp_local_addr_list) {
227 addr = list_entry(pos, struct sctp_sockaddr_entry, list);
228 list_del(pos);
229 kfree(addr);
230 }
231}
232
Vlad Yasevich29303542007-09-16 16:02:12 -0700233void sctp_local_addr_free(struct rcu_head *head)
234{
235 struct sctp_sockaddr_entry *e = container_of(head,
236 struct sctp_sockaddr_entry, rcu);
237 kfree(e);
238}
239
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240/* Copy the local addresses which are valid for 'scope' into 'bp'. */
241int sctp_copy_local_addr_list(struct sctp_bind_addr *bp, sctp_scope_t scope,
Al Virodd0fc662005-10-07 07:46:04 +0100242 gfp_t gfp, int copy_flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243{
244 struct sctp_sockaddr_entry *addr;
245 int error = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246
Vlad Yasevich29303542007-09-16 16:02:12 -0700247 rcu_read_lock();
248 list_for_each_entry_rcu(addr, &sctp_local_addr_list, list) {
249 if (!addr->valid)
250 continue;
Al Viro6244be42006-11-20 17:21:44 -0800251 if (sctp_in_scope(&addr->a, scope)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252 /* Now that the address is in scope, check to see if
253 * the address type is really supported by the local
254 * sock as well as the remote peer.
255 */
Al Viro6244be42006-11-20 17:21:44 -0800256 if ((((AF_INET == addr->a.sa.sa_family) &&
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257 (copy_flags & SCTP_ADDR4_PEERSUPP))) ||
Al Viro6244be42006-11-20 17:21:44 -0800258 (((AF_INET6 == addr->a.sa.sa_family) &&
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259 (copy_flags & SCTP_ADDR6_ALLOWED) &&
260 (copy_flags & SCTP_ADDR6_PEERSUPP)))) {
Vlad Yasevichf57d96b2007-12-20 14:12:24 -0800261 error = sctp_add_bind_addr(bp, &addr->a,
262 SCTP_ADDR_SRC, GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263 if (error)
264 goto end_copy;
265 }
266 }
267 }
268
269end_copy:
Vlad Yasevich29303542007-09-16 16:02:12 -0700270 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271 return error;
272}
273
274/* Initialize a sctp_addr from in incoming skb. */
275static void sctp_v4_from_skb(union sctp_addr *addr, struct sk_buff *skb,
276 int is_saddr)
277{
278 void *from;
Al Virod55c41b2006-11-20 17:09:40 -0800279 __be16 *port;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280 struct sctphdr *sh;
281
282 port = &addr->v4.sin_port;
283 addr->v4.sin_family = AF_INET;
284
Arnaldo Carvalho de Melo2c0fd382007-03-13 13:59:32 -0300285 sh = sctp_hdr(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286 if (is_saddr) {
Al Virod55c41b2006-11-20 17:09:40 -0800287 *port = sh->source;
Arnaldo Carvalho de Meloeddc9ec2007-04-20 22:47:35 -0700288 from = &ip_hdr(skb)->saddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289 } else {
Al Virod55c41b2006-11-20 17:09:40 -0800290 *port = sh->dest;
Arnaldo Carvalho de Meloeddc9ec2007-04-20 22:47:35 -0700291 from = &ip_hdr(skb)->daddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292 }
293 memcpy(&addr->v4.sin_addr.s_addr, from, sizeof(struct in_addr));
294}
295
296/* Initialize an sctp_addr from a socket. */
297static void sctp_v4_from_sk(union sctp_addr *addr, struct sock *sk)
298{
299 addr->v4.sin_family = AF_INET;
Al Viro7dcdbd92006-11-20 17:24:21 -0800300 addr->v4.sin_port = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301 addr->v4.sin_addr.s_addr = inet_sk(sk)->rcv_saddr;
302}
303
304/* Initialize sk->sk_rcv_saddr from sctp_addr. */
305static void sctp_v4_to_sk_saddr(union sctp_addr *addr, struct sock *sk)
306{
307 inet_sk(sk)->rcv_saddr = addr->v4.sin_addr.s_addr;
308}
309
310/* Initialize sk->sk_daddr from sctp_addr. */
311static void sctp_v4_to_sk_daddr(union sctp_addr *addr, struct sock *sk)
312{
313 inet_sk(sk)->daddr = addr->v4.sin_addr.s_addr;
314}
315
316/* Initialize a sctp_addr from an address parameter. */
317static void sctp_v4_from_addr_param(union sctp_addr *addr,
318 union sctp_addr_param *param,
Al Virodd86d132006-11-20 17:11:13 -0800319 __be16 port, int iif)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320{
321 addr->v4.sin_family = AF_INET;
322 addr->v4.sin_port = port;
323 addr->v4.sin_addr.s_addr = param->v4.addr.s_addr;
324}
325
326/* Initialize an address parameter from a sctp_addr and return the length
327 * of the address parameter.
328 */
329static int sctp_v4_to_addr_param(const union sctp_addr *addr,
330 union sctp_addr_param *param)
331{
332 int length = sizeof(sctp_ipv4addr_param_t);
333
334 param->v4.param_hdr.type = SCTP_PARAM_IPV4_ADDRESS;
Al Virodbc16db2006-11-20 17:01:42 -0800335 param->v4.param_hdr.length = htons(length);
YOSHIFUJI Hideakid808ad92007-02-09 23:25:18 +0900336 param->v4.addr.s_addr = addr->v4.sin_addr.s_addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337
338 return length;
339}
340
341/* Initialize a sctp_addr from a dst_entry. */
342static void sctp_v4_dst_saddr(union sctp_addr *saddr, struct dst_entry *dst,
Al Viro854d43a2006-11-20 17:06:24 -0800343 __be16 port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344{
345 struct rtable *rt = (struct rtable *)dst;
346 saddr->v4.sin_family = AF_INET;
347 saddr->v4.sin_port = port;
348 saddr->v4.sin_addr.s_addr = rt->rt_src;
349}
350
351/* Compare two addresses exactly. */
352static int sctp_v4_cmp_addr(const union sctp_addr *addr1,
353 const union sctp_addr *addr2)
354{
355 if (addr1->sa.sa_family != addr2->sa.sa_family)
356 return 0;
357 if (addr1->v4.sin_port != addr2->v4.sin_port)
358 return 0;
359 if (addr1->v4.sin_addr.s_addr != addr2->v4.sin_addr.s_addr)
360 return 0;
361
362 return 1;
363}
364
365/* Initialize addr struct to INADDR_ANY. */
Al Viro6fbfa9f2006-11-20 17:24:53 -0800366static void sctp_v4_inaddr_any(union sctp_addr *addr, __be16 port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367{
368 addr->v4.sin_family = AF_INET;
Al Viroe6f1ceb2008-03-17 22:44:53 -0700369 addr->v4.sin_addr.s_addr = htonl(INADDR_ANY);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370 addr->v4.sin_port = port;
371}
372
373/* Is this a wildcard address? */
374static int sctp_v4_is_any(const union sctp_addr *addr)
375{
Al Viroe6f1ceb2008-03-17 22:44:53 -0700376 return htonl(INADDR_ANY) == addr->v4.sin_addr.s_addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377}
378
379/* This function checks if the address is a valid address to be used for
380 * SCTP binding.
381 *
382 * Output:
383 * Return 0 - If the address is a non-unicast or an illegal address.
384 * Return 1 - If the address is a unicast.
385 */
Vlad Yasevich5636bef2006-06-17 22:55:35 -0700386static int sctp_v4_addr_valid(union sctp_addr *addr,
387 struct sctp_sock *sp,
388 const struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389{
Vlad Yasevich7dab83d2008-07-18 23:05:40 -0700390 /* IPv4 addresses not allowed */
391 if (sp && ipv6_only_sock(sctp_opt2sk(sp)))
392 return 0;
393
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394 /* Is this a non-unicast address or a unusable SCTP address? */
Joe Perchesb5cb2bb2007-12-16 13:46:59 -0800395 if (IS_IPV4_UNUSABLE_ADDRESS(addr->v4.sin_addr.s_addr))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396 return 0;
397
YOSHIFUJI Hideakid808ad92007-02-09 23:25:18 +0900398 /* Is this a broadcast address? */
Eric Dumazetee6b9672008-03-05 18:30:47 -0800399 if (skb && skb->rtable->rt_flags & RTCF_BROADCAST)
YOSHIFUJI Hideakid808ad92007-02-09 23:25:18 +0900400 return 0;
Vlad Yasevich5636bef2006-06-17 22:55:35 -0700401
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402 return 1;
403}
404
405/* Should this be available for binding? */
406static int sctp_v4_available(union sctp_addr *addr, struct sctp_sock *sp)
407{
Eric W. Biederman6b175b22008-01-10 03:25:28 -0800408 int ret = inet_addr_type(&init_net, addr->v4.sin_addr.s_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410
Al Viroe6f1ceb2008-03-17 22:44:53 -0700411 if (addr->v4.sin_addr.s_addr != htonl(INADDR_ANY) &&
Neil Hormancdac4e02005-06-13 15:12:33 -0700412 ret != RTN_LOCAL &&
413 !sp->inet.freebind &&
414 !sysctl_ip_nonlocal_bind)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415 return 0;
Neil Hormancdac4e02005-06-13 15:12:33 -0700416
Vlad Yasevich7dab83d2008-07-18 23:05:40 -0700417 if (ipv6_only_sock(sctp_opt2sk(sp)))
418 return 0;
419
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420 return 1;
421}
422
423/* Checking the loopback, private and other address scopes as defined in
424 * RFC 1918. The IPv4 scoping is based on the draft for SCTP IPv4
425 * scoping <draft-stewart-tsvwg-sctp-ipv4-00.txt>.
426 *
427 * Level 0 - unusable SCTP addresses
428 * Level 1 - loopback address
429 * Level 2 - link-local addresses
430 * Level 3 - private addresses.
431 * Level 4 - global addresses
432 * For INIT and INIT-ACK address list, let L be the level of
433 * of requested destination address, sender and receiver
434 * SHOULD include all of its addresses with level greater
435 * than or equal to L.
436 */
437static sctp_scope_t sctp_v4_scope(union sctp_addr *addr)
438{
439 sctp_scope_t retval;
440
441 /* Should IPv4 scoping be a sysctl configurable option
442 * so users can turn it off (default on) for certain
443 * unconventional networking environments?
444 */
445
446 /* Check for unusable SCTP addresses. */
Joe Perchesb5cb2bb2007-12-16 13:46:59 -0800447 if (IS_IPV4_UNUSABLE_ADDRESS(addr->v4.sin_addr.s_addr)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448 retval = SCTP_SCOPE_UNUSABLE;
Joe Perchesb5cb2bb2007-12-16 13:46:59 -0800449 } else if (ipv4_is_loopback(addr->v4.sin_addr.s_addr)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700450 retval = SCTP_SCOPE_LOOPBACK;
Joe Perchesb5cb2bb2007-12-16 13:46:59 -0800451 } else if (ipv4_is_linklocal_169(addr->v4.sin_addr.s_addr)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452 retval = SCTP_SCOPE_LINK;
Joe Perchesb5cb2bb2007-12-16 13:46:59 -0800453 } else if (ipv4_is_private_10(addr->v4.sin_addr.s_addr) ||
454 ipv4_is_private_172(addr->v4.sin_addr.s_addr) ||
455 ipv4_is_private_192(addr->v4.sin_addr.s_addr)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456 retval = SCTP_SCOPE_PRIVATE;
457 } else {
458 retval = SCTP_SCOPE_GLOBAL;
459 }
460
461 return retval;
462}
463
464/* Returns a valid dst cache entry for the given source and destination ip
465 * addresses. If an association is passed, trys to get a dst entry with a
466 * source address that matches an address in the bind address list.
467 */
468static struct dst_entry *sctp_v4_get_dst(struct sctp_association *asoc,
469 union sctp_addr *daddr,
470 union sctp_addr *saddr)
471{
472 struct rtable *rt;
473 struct flowi fl;
474 struct sctp_bind_addr *bp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475 struct sctp_sockaddr_entry *laddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476 struct dst_entry *dst = NULL;
477 union sctp_addr dst_saddr;
478
479 memset(&fl, 0x0, sizeof(struct flowi));
480 fl.fl4_dst = daddr->v4.sin_addr.s_addr;
481 fl.proto = IPPROTO_SCTP;
482 if (asoc) {
483 fl.fl4_tos = RT_CONN_FLAGS(asoc->base.sk);
484 fl.oif = asoc->base.sk->sk_bound_dev_if;
485 }
486 if (saddr)
487 fl.fl4_src = saddr->v4.sin_addr.s_addr;
488
Harvey Harrison21454aa2008-10-31 00:54:56 -0700489 SCTP_DEBUG_PRINTK("%s: DST:%pI4, SRC:%pI4 - ",
490 __func__, &fl.fl4_dst, &fl.fl4_src);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491
Denis V. Lunevf2063512008-01-22 22:07:34 -0800492 if (!ip_route_output_key(&init_net, &rt, &fl)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493 dst = &rt->u.dst;
494 }
495
496 /* If there is no association or if a source address is passed, no
497 * more validation is required.
498 */
499 if (!asoc || saddr)
500 goto out;
501
502 bp = &asoc->base.bind_addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503
504 if (dst) {
505 /* Walk through the bind address list and look for a bind
506 * address that matches the source address of the returned dst.
507 */
Gui Jianfeng159c6be2008-06-04 12:38:07 -0700508 sctp_v4_dst_saddr(&dst_saddr, dst, htons(bp->port));
Vlad Yasevich559cf712007-09-16 16:03:28 -0700509 rcu_read_lock();
510 list_for_each_entry_rcu(laddr, &bp->address_list, list) {
Vlad Yasevichf57d96b2007-12-20 14:12:24 -0800511 if (!laddr->valid || (laddr->state != SCTP_ADDR_SRC))
Sridhar Samudraladc022a92006-07-21 14:49:25 -0700512 continue;
Al Viro854d43a2006-11-20 17:06:24 -0800513 if (sctp_v4_cmp_addr(&dst_saddr, &laddr->a))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700514 goto out_unlock;
515 }
Vlad Yasevich559cf712007-09-16 16:03:28 -0700516 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517
518 /* None of the bound addresses match the source address of the
519 * dst. So release it.
520 */
521 dst_release(dst);
522 dst = NULL;
523 }
524
525 /* Walk through the bind address list and try to get a dst that
526 * matches a bind address as the source address.
527 */
Vlad Yasevich559cf712007-09-16 16:03:28 -0700528 rcu_read_lock();
529 list_for_each_entry_rcu(laddr, &bp->address_list, list) {
530 if (!laddr->valid)
531 continue;
Vlad Yasevichf57d96b2007-12-20 14:12:24 -0800532 if ((laddr->state == SCTP_ADDR_SRC) &&
Al Viro6244be42006-11-20 17:21:44 -0800533 (AF_INET == laddr->a.sa.sa_family)) {
534 fl.fl4_src = laddr->a.v4.sin_addr.s_addr;
Denis V. Lunevf2063512008-01-22 22:07:34 -0800535 if (!ip_route_output_key(&init_net, &rt, &fl)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536 dst = &rt->u.dst;
537 goto out_unlock;
538 }
539 }
540 }
541
542out_unlock:
Vlad Yasevich559cf712007-09-16 16:03:28 -0700543 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700544out:
545 if (dst)
Harvey Harrison21454aa2008-10-31 00:54:56 -0700546 SCTP_DEBUG_PRINTK("rt_dst:%pI4, rt_src:%pI4\n",
547 &rt->rt_dst, &rt->rt_src);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700548 else
549 SCTP_DEBUG_PRINTK("NO ROUTE\n");
550
551 return dst;
552}
553
554/* For v4, the source address is cached in the route entry(dst). So no need
555 * to cache it separately and hence this is an empty routine.
556 */
YOSHIFUJI Hideakie5117102008-05-29 19:55:05 +0900557static void sctp_v4_get_saddr(struct sctp_sock *sk,
558 struct sctp_association *asoc,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559 struct dst_entry *dst,
560 union sctp_addr *daddr,
561 union sctp_addr *saddr)
562{
563 struct rtable *rt = (struct rtable *)dst;
564
Vladislav Yasevich23ec47a2005-11-11 16:05:55 -0800565 if (!asoc)
566 return;
567
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568 if (rt) {
569 saddr->v4.sin_family = AF_INET;
Al Virod3f7a542006-11-20 17:12:41 -0800570 saddr->v4.sin_port = htons(asoc->base.bind_addr.port);
YOSHIFUJI Hideakid808ad92007-02-09 23:25:18 +0900571 saddr->v4.sin_addr.s_addr = rt->rt_src;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572 }
573}
574
575/* What interface did this skb arrive on? */
576static int sctp_v4_skb_iif(const struct sk_buff *skb)
577{
Eric Dumazetee6b9672008-03-05 18:30:47 -0800578 return skb->rtable->rt_iif;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579}
580
581/* Was this packet marked by Explicit Congestion Notification? */
582static int sctp_v4_is_ce(const struct sk_buff *skb)
583{
Arnaldo Carvalho de Meloeddc9ec2007-04-20 22:47:35 -0700584 return INET_ECN_is_ce(ip_hdr(skb)->tos);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700585}
586
587/* Create and initialize a new sk for the socket returned by accept(). */
588static struct sock *sctp_v4_create_accept_sk(struct sock *sk,
589 struct sctp_association *asoc)
590{
591 struct inet_sock *inet = inet_sk(sk);
592 struct inet_sock *newinet;
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +0900593 struct sock *newsk = sk_alloc(sock_net(sk), PF_INET, GFP_KERNEL,
Pavel Emelyanov6257ff22007-11-01 00:39:31 -0700594 sk->sk_prot);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700595
596 if (!newsk)
597 goto out;
598
599 sock_init_data(NULL, newsk);
600
601 newsk->sk_type = SOCK_STREAM;
602
603 newsk->sk_no_check = sk->sk_no_check;
604 newsk->sk_reuse = sk->sk_reuse;
605 newsk->sk_shutdown = sk->sk_shutdown;
606
607 newsk->sk_destruct = inet_sock_destruct;
608 newsk->sk_family = PF_INET;
609 newsk->sk_protocol = IPPROTO_SCTP;
610 newsk->sk_backlog_rcv = sk->sk_prot->backlog_rcv;
611 sock_reset_flag(newsk, SOCK_ZAPPED);
612
613 newinet = inet_sk(newsk);
614
615 /* Initialize sk's sport, dport, rcv_saddr and daddr for
616 * getsockname() and getpeername()
617 */
618 newinet->sport = inet->sport;
619 newinet->saddr = inet->saddr;
620 newinet->rcv_saddr = inet->rcv_saddr;
621 newinet->dport = htons(asoc->peer.port);
622 newinet->daddr = asoc->peer.primary_addr.v4.sin_addr.s_addr;
623 newinet->pmtudisc = inet->pmtudisc;
YOSHIFUJI Hideakid808ad92007-02-09 23:25:18 +0900624 newinet->id = asoc->next_tsn ^ jiffies;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700625
626 newinet->uc_ttl = -1;
627 newinet->mc_loop = 1;
628 newinet->mc_ttl = 1;
629 newinet->mc_index = 0;
630 newinet->mc_list = NULL;
631
Arnaldo Carvalho de Meloe6848972005-08-09 19:45:38 -0700632 sk_refcnt_debug_inc(newsk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633
634 if (newsk->sk_prot->init(newsk)) {
635 sk_common_release(newsk);
636 newsk = NULL;
637 }
638
639out:
640 return newsk;
641}
642
643/* Map address, empty for v4 family */
644static void sctp_v4_addr_v4map(struct sctp_sock *sp, union sctp_addr *addr)
645{
646 /* Empty */
647}
648
649/* Dump the v4 addr to the seq file. */
650static void sctp_v4_seq_dump_addr(struct seq_file *seq, union sctp_addr *addr)
651{
Harvey Harrison21454aa2008-10-31 00:54:56 -0700652 seq_printf(seq, "%pI4 ", &addr->v4.sin_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700653}
654
Vlad Yasevichb9031d92008-06-04 12:40:15 -0700655static void sctp_v4_ecn_capable(struct sock *sk)
656{
657 INET_ECN_xmit(sk);
658}
659
Vlad Yasevich29303542007-09-16 16:02:12 -0700660/* Event handler for inet address addition/deletion events.
661 * The sctp_local_addr_list needs to be protocted by a spin lock since
662 * multiple notifiers (say IPv4 and IPv6) may be running at the same
663 * time and thus corrupt the list.
664 * The reader side is protected with RCU.
665 */
Adrian Bunk24123182006-12-20 16:08:22 -0800666static int sctp_inetaddr_event(struct notifier_block *this, unsigned long ev,
667 void *ptr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668{
Sridhar Samudrala29c7cf92006-12-13 16:26:26 -0800669 struct in_ifaddr *ifa = (struct in_ifaddr *)ptr;
Vlad Yasevich29303542007-09-16 16:02:12 -0700670 struct sctp_sockaddr_entry *addr = NULL;
671 struct sctp_sockaddr_entry *temp;
Chidambar 'ilLogict' Zinnoury22626212008-03-11 18:05:02 -0700672 int found = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700673
YOSHIFUJI Hideaki721499e2008-07-19 22:34:43 -0700674 if (!net_eq(dev_net(ifa->ifa_dev->dev), &init_net))
Denis V. Lunev6133fb12008-02-28 20:46:17 -0800675 return NOTIFY_DONE;
676
Sridhar Samudrala29c7cf92006-12-13 16:26:26 -0800677 switch (ev) {
678 case NETDEV_UP:
679 addr = kmalloc(sizeof(struct sctp_sockaddr_entry), GFP_ATOMIC);
680 if (addr) {
681 addr->a.v4.sin_family = AF_INET;
682 addr->a.v4.sin_port = 0;
683 addr->a.v4.sin_addr.s_addr = ifa->ifa_local;
Vlad Yasevich29303542007-09-16 16:02:12 -0700684 addr->valid = 1;
685 spin_lock_bh(&sctp_local_addr_lock);
686 list_add_tail_rcu(&addr->list, &sctp_local_addr_list);
687 spin_unlock_bh(&sctp_local_addr_lock);
Sridhar Samudrala29c7cf92006-12-13 16:26:26 -0800688 }
689 break;
690 case NETDEV_DOWN:
Vlad Yasevich29303542007-09-16 16:02:12 -0700691 spin_lock_bh(&sctp_local_addr_lock);
692 list_for_each_entry_safe(addr, temp,
693 &sctp_local_addr_list, list) {
Pavel Emelyanova40a7d12008-04-12 18:40:38 -0700694 if (addr->a.sa.sa_family == AF_INET &&
695 addr->a.v4.sin_addr.s_addr ==
696 ifa->ifa_local) {
Chidambar 'ilLogict' Zinnoury22626212008-03-11 18:05:02 -0700697 found = 1;
Vlad Yasevich29303542007-09-16 16:02:12 -0700698 addr->valid = 0;
699 list_del_rcu(&addr->list);
Sridhar Samudrala29c7cf92006-12-13 16:26:26 -0800700 break;
701 }
702 }
Vlad Yasevich29303542007-09-16 16:02:12 -0700703 spin_unlock_bh(&sctp_local_addr_lock);
Chidambar 'ilLogict' Zinnoury22626212008-03-11 18:05:02 -0700704 if (found)
Vlad Yasevich29303542007-09-16 16:02:12 -0700705 call_rcu(&addr->rcu, sctp_local_addr_free);
Sridhar Samudrala29c7cf92006-12-13 16:26:26 -0800706 break;
707 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700708
709 return NOTIFY_DONE;
710}
711
712/*
713 * Initialize the control inode/socket with a control endpoint data
714 * structure. This endpoint is reserved exclusively for the OOTB processing.
715 */
716static int sctp_ctl_sock_init(void)
717{
718 int err;
719 sa_family_t family;
720
721 if (sctp_get_pf_specific(PF_INET6))
722 family = PF_INET6;
723 else
724 family = PF_INET;
725
Denis V. Luneveee4fe42008-04-03 14:27:58 -0700726 err = inet_ctl_sock_create(&sctp_ctl_sock, family,
Denis V. Lunev56772422008-04-03 14:28:30 -0700727 SOCK_SEQPACKET, IPPROTO_SCTP, &init_net);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700728 if (err < 0) {
729 printk(KERN_ERR
730 "SCTP: Failed to create the SCTP control socket.\n");
731 return err;
732 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700733 return 0;
734}
735
736/* Register address family specific functions. */
737int sctp_register_af(struct sctp_af *af)
738{
739 switch (af->sa_family) {
740 case AF_INET:
741 if (sctp_af_v4_specific)
742 return 0;
743 sctp_af_v4_specific = af;
744 break;
745 case AF_INET6:
746 if (sctp_af_v6_specific)
747 return 0;
748 sctp_af_v6_specific = af;
749 break;
750 default:
751 return 0;
752 }
753
754 INIT_LIST_HEAD(&af->list);
755 list_add_tail(&af->list, &sctp_address_families);
756 return 1;
757}
758
759/* Get the table of functions for manipulating a particular address
760 * family.
761 */
762struct sctp_af *sctp_get_af_specific(sa_family_t family)
763{
764 switch (family) {
765 case AF_INET:
766 return sctp_af_v4_specific;
767 case AF_INET6:
768 return sctp_af_v6_specific;
769 default:
770 return NULL;
771 }
772}
773
774/* Common code to initialize a AF_INET msg_name. */
775static void sctp_inet_msgname(char *msgname, int *addr_len)
776{
777 struct sockaddr_in *sin;
778
779 sin = (struct sockaddr_in *)msgname;
780 *addr_len = sizeof(struct sockaddr_in);
781 sin->sin_family = AF_INET;
782 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
783}
784
785/* Copy the primary address of the peer primary address as the msg_name. */
786static void sctp_inet_event_msgname(struct sctp_ulpevent *event, char *msgname,
787 int *addr_len)
788{
789 struct sockaddr_in *sin, *sinfrom;
790
791 if (msgname) {
792 struct sctp_association *asoc;
793
794 asoc = event->asoc;
795 sctp_inet_msgname(msgname, addr_len);
796 sin = (struct sockaddr_in *)msgname;
797 sinfrom = &asoc->peer.primary_addr.v4;
798 sin->sin_port = htons(asoc->peer.port);
799 sin->sin_addr.s_addr = sinfrom->sin_addr.s_addr;
800 }
801}
802
803/* Initialize and copy out a msgname from an inbound skb. */
804static void sctp_inet_skb_msgname(struct sk_buff *skb, char *msgname, int *len)
805{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700806 if (msgname) {
Arnaldo Carvalho de Melo2c0fd382007-03-13 13:59:32 -0300807 struct sctphdr *sh = sctp_hdr(skb);
808 struct sockaddr_in *sin = (struct sockaddr_in *)msgname;
809
Linus Torvalds1da177e2005-04-16 15:20:36 -0700810 sctp_inet_msgname(msgname, len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700811 sin->sin_port = sh->source;
Arnaldo Carvalho de Meloeddc9ec2007-04-20 22:47:35 -0700812 sin->sin_addr.s_addr = ip_hdr(skb)->saddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700813 }
814}
815
816/* Do we support this AF? */
817static int sctp_inet_af_supported(sa_family_t family, struct sctp_sock *sp)
818{
819 /* PF_INET only supports AF_INET addresses. */
820 return (AF_INET == family);
821}
822
823/* Address matching with wildcards allowed. */
824static int sctp_inet_cmp_addr(const union sctp_addr *addr1,
825 const union sctp_addr *addr2,
826 struct sctp_sock *opt)
827{
828 /* PF_INET only supports AF_INET addresses. */
829 if (addr1->sa.sa_family != addr2->sa.sa_family)
830 return 0;
Al Viroe6f1ceb2008-03-17 22:44:53 -0700831 if (htonl(INADDR_ANY) == addr1->v4.sin_addr.s_addr ||
832 htonl(INADDR_ANY) == addr2->v4.sin_addr.s_addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700833 return 1;
834 if (addr1->v4.sin_addr.s_addr == addr2->v4.sin_addr.s_addr)
835 return 1;
836
837 return 0;
838}
839
840/* Verify that provided sockaddr looks bindable. Common verification has
841 * already been taken care of.
842 */
843static int sctp_inet_bind_verify(struct sctp_sock *opt, union sctp_addr *addr)
844{
845 return sctp_v4_available(addr, opt);
846}
847
848/* Verify that sockaddr looks sendable. Common verification has already
849 * been taken care of.
850 */
851static int sctp_inet_send_verify(struct sctp_sock *opt, union sctp_addr *addr)
852{
853 return 1;
854}
855
856/* Fill in Supported Address Type information for INIT and INIT-ACK
857 * chunks. Returns number of addresses supported.
858 */
859static int sctp_inet_supported_addrs(const struct sctp_sock *opt,
Al Viro3dbe8652006-11-20 17:25:49 -0800860 __be16 *types)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700861{
862 types[0] = SCTP_PARAM_IPV4_ADDRESS;
863 return 1;
864}
865
866/* Wrapper routine that calls the ip transmit routine. */
867static inline int sctp_v4_xmit(struct sk_buff *skb,
Herbert Xuf8803742008-08-03 21:15:08 -0700868 struct sctp_transport *transport)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700869{
Herbert Xuf8803742008-08-03 21:15:08 -0700870 struct inet_sock *inet = inet_sk(skb->sk);
871
Harvey Harrison21454aa2008-10-31 00:54:56 -0700872 SCTP_DEBUG_PRINTK("%s: skb:%p, len:%d, src:%pI4, dst:%pI4\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -0800873 __func__, skb, skb->len,
Harvey Harrison21454aa2008-10-31 00:54:56 -0700874 &skb->rtable->rt_src,
875 &skb->rtable->rt_dst);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700876
Herbert Xuf8803742008-08-03 21:15:08 -0700877 inet->pmtudisc = transport->param_flags & SPP_PMTUD_ENABLE ?
878 IP_PMTUDISC_DO : IP_PMTUDISC_DONT;
879
Linus Torvalds1da177e2005-04-16 15:20:36 -0700880 SCTP_INC_STATS(SCTP_MIB_OUTSCTPPACKS);
Herbert Xuf8803742008-08-03 21:15:08 -0700881 return ip_queue_xmit(skb, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700882}
883
Neil Horman15efbe72008-02-15 09:53:59 -0500884static struct sctp_af sctp_af_inet;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700885
886static struct sctp_pf sctp_pf_inet = {
887 .event_msgname = sctp_inet_event_msgname,
888 .skb_msgname = sctp_inet_skb_msgname,
889 .af_supported = sctp_inet_af_supported,
890 .cmp_addr = sctp_inet_cmp_addr,
891 .bind_verify = sctp_inet_bind_verify,
892 .send_verify = sctp_inet_send_verify,
893 .supported_addrs = sctp_inet_supported_addrs,
894 .create_accept_sk = sctp_v4_create_accept_sk,
895 .addr_v4map = sctp_v4_addr_v4map,
Neil Horman15efbe72008-02-15 09:53:59 -0500896 .af = &sctp_af_inet
Linus Torvalds1da177e2005-04-16 15:20:36 -0700897};
898
899/* Notifier for inetaddr addition/deletion events. */
900static struct notifier_block sctp_inetaddr_notifier = {
901 .notifier_call = sctp_inetaddr_event,
902};
903
904/* Socket operations. */
Eric Dumazet90ddc4f2005-12-22 12:49:22 -0800905static const struct proto_ops inet_seqpacket_ops = {
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800906 .family = PF_INET,
907 .owner = THIS_MODULE,
908 .release = inet_release, /* Needs to be wrapped... */
909 .bind = inet_bind,
910 .connect = inet_dgram_connect,
911 .socketpair = sock_no_socketpair,
912 .accept = inet_accept,
913 .getname = inet_getname, /* Semantics are different. */
914 .poll = sctp_poll,
915 .ioctl = inet_ioctl,
916 .listen = sctp_inet_listen,
917 .shutdown = inet_shutdown, /* Looks harmless. */
918 .setsockopt = sock_common_setsockopt, /* IP_SOL IP_OPTION is a problem */
919 .getsockopt = sock_common_getsockopt,
920 .sendmsg = inet_sendmsg,
921 .recvmsg = sock_common_recvmsg,
922 .mmap = sock_no_mmap,
923 .sendpage = sock_no_sendpage,
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800924#ifdef CONFIG_COMPAT
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800925 .compat_setsockopt = compat_sock_common_setsockopt,
926 .compat_getsockopt = compat_sock_common_getsockopt,
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800927#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700928};
929
930/* Registration with AF_INET family. */
931static struct inet_protosw sctp_seqpacket_protosw = {
932 .type = SOCK_SEQPACKET,
933 .protocol = IPPROTO_SCTP,
934 .prot = &sctp_prot,
935 .ops = &inet_seqpacket_ops,
936 .capability = -1,
937 .no_check = 0,
938 .flags = SCTP_PROTOSW_FLAG
939};
940static struct inet_protosw sctp_stream_protosw = {
941 .type = SOCK_STREAM,
942 .protocol = IPPROTO_SCTP,
943 .prot = &sctp_prot,
944 .ops = &inet_seqpacket_ops,
945 .capability = -1,
946 .no_check = 0,
947 .flags = SCTP_PROTOSW_FLAG
948};
949
950/* Register with IP layer. */
951static struct net_protocol sctp_protocol = {
952 .handler = sctp_rcv,
953 .err_handler = sctp_v4_err,
954 .no_policy = 1,
955};
956
957/* IPv4 address related functions. */
Neil Horman15efbe72008-02-15 09:53:59 -0500958static struct sctp_af sctp_af_inet = {
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800959 .sa_family = AF_INET,
960 .sctp_xmit = sctp_v4_xmit,
961 .setsockopt = ip_setsockopt,
962 .getsockopt = ip_getsockopt,
963 .get_dst = sctp_v4_get_dst,
964 .get_saddr = sctp_v4_get_saddr,
965 .copy_addrlist = sctp_v4_copy_addrlist,
966 .from_skb = sctp_v4_from_skb,
967 .from_sk = sctp_v4_from_sk,
968 .to_sk_saddr = sctp_v4_to_sk_saddr,
969 .to_sk_daddr = sctp_v4_to_sk_daddr,
970 .from_addr_param = sctp_v4_from_addr_param,
971 .to_addr_param = sctp_v4_to_addr_param,
972 .dst_saddr = sctp_v4_dst_saddr,
973 .cmp_addr = sctp_v4_cmp_addr,
974 .addr_valid = sctp_v4_addr_valid,
975 .inaddr_any = sctp_v4_inaddr_any,
976 .is_any = sctp_v4_is_any,
977 .available = sctp_v4_available,
978 .scope = sctp_v4_scope,
979 .skb_iif = sctp_v4_skb_iif,
980 .is_ce = sctp_v4_is_ce,
981 .seq_dump_addr = sctp_v4_seq_dump_addr,
Vlad Yasevichb9031d92008-06-04 12:40:15 -0700982 .ecn_capable = sctp_v4_ecn_capable,
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800983 .net_header_len = sizeof(struct iphdr),
984 .sockaddr_len = sizeof(struct sockaddr_in),
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800985#ifdef CONFIG_COMPAT
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800986 .compat_setsockopt = compat_ip_setsockopt,
987 .compat_getsockopt = compat_ip_getsockopt,
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800988#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700989};
990
991struct sctp_pf *sctp_get_pf_specific(sa_family_t family) {
992
993 switch (family) {
994 case PF_INET:
995 return sctp_pf_inet_specific;
996 case PF_INET6:
997 return sctp_pf_inet6_specific;
998 default:
999 return NULL;
1000 }
1001}
1002
1003/* Register the PF specific function table. */
1004int sctp_register_pf(struct sctp_pf *pf, sa_family_t family)
1005{
1006 switch (family) {
1007 case PF_INET:
1008 if (sctp_pf_inet_specific)
1009 return 0;
1010 sctp_pf_inet_specific = pf;
1011 break;
1012 case PF_INET6:
1013 if (sctp_pf_inet6_specific)
1014 return 0;
1015 sctp_pf_inet6_specific = pf;
1016 break;
1017 default:
1018 return 0;
1019 }
1020 return 1;
1021}
1022
YOSHIFUJI Hideaki996b1db2008-04-10 03:50:13 -07001023static inline int init_sctp_mibs(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001024{
YOSHIFUJI Hideaki996b1db2008-04-10 03:50:13 -07001025 return snmp_mib_init((void**)sctp_statistics, sizeof(struct sctp_mib));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001026}
1027
YOSHIFUJI Hideaki996b1db2008-04-10 03:50:13 -07001028static inline void cleanup_sctp_mibs(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001029{
YOSHIFUJI Hideaki996b1db2008-04-10 03:50:13 -07001030 snmp_mib_free((void**)sctp_statistics);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001031}
1032
Vlad Yasevich270637a2008-03-20 15:17:14 -07001033static void sctp_v4_pf_init(void)
1034{
1035 /* Initialize the SCTP specific PF functions. */
1036 sctp_register_pf(&sctp_pf_inet, PF_INET);
1037 sctp_register_af(&sctp_af_inet);
1038}
1039
1040static void sctp_v4_pf_exit(void)
1041{
1042 list_del(&sctp_af_inet.list);
1043}
1044
1045static int sctp_v4_protosw_init(void)
1046{
1047 int rc;
1048
1049 rc = proto_register(&sctp_prot, 1);
1050 if (rc)
1051 return rc;
1052
1053 /* Register SCTP(UDP and TCP style) with socket layer. */
1054 inet_register_protosw(&sctp_seqpacket_protosw);
1055 inet_register_protosw(&sctp_stream_protosw);
1056
1057 return 0;
1058}
1059
1060static void sctp_v4_protosw_exit(void)
1061{
1062 inet_unregister_protosw(&sctp_stream_protosw);
1063 inet_unregister_protosw(&sctp_seqpacket_protosw);
1064 proto_unregister(&sctp_prot);
1065}
1066
1067static int sctp_v4_add_protocol(void)
1068{
1069 /* Register notifier for inet address additions/deletions. */
1070 register_inetaddr_notifier(&sctp_inetaddr_notifier);
1071
1072 /* Register SCTP with inet layer. */
1073 if (inet_add_protocol(&sctp_protocol, IPPROTO_SCTP) < 0)
1074 return -EAGAIN;
1075
1076 return 0;
1077}
1078
1079static void sctp_v4_del_protocol(void)
1080{
1081 inet_del_protocol(&sctp_protocol, IPPROTO_SCTP);
1082 unregister_inetaddr_notifier(&sctp_inetaddr_notifier);
1083}
1084
Linus Torvalds1da177e2005-04-16 15:20:36 -07001085/* Initialize the universe into something sensible. */
1086SCTP_STATIC __init int sctp_init(void)
1087{
1088 int i;
1089 int status = -EINVAL;
1090 unsigned long goal;
Neil Horman4d93df02007-08-15 16:07:44 -07001091 unsigned long limit;
Vlad Yasevich845525a2008-07-18 23:08:21 -07001092 unsigned long nr_pages;
Neil Horman4d93df02007-08-15 16:07:44 -07001093 int max_share;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001094 int order;
1095
1096 /* SCTP_DEBUG sanity check. */
1097 if (!sctp_sanity_check())
1098 goto out;
1099
Sridhar Samudrala827bf122007-05-04 13:36:30 -07001100 /* Allocate bind_bucket and chunk caches. */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001101 status = -ENOBUFS;
1102 sctp_bucket_cachep = kmem_cache_create("sctp_bind_bucket",
1103 sizeof(struct sctp_bind_bucket),
1104 0, SLAB_HWCACHE_ALIGN,
Paul Mundt20c2df82007-07-20 10:11:58 +09001105 NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001106 if (!sctp_bucket_cachep)
Sridhar Samudrala827bf122007-05-04 13:36:30 -07001107 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001108
1109 sctp_chunk_cachep = kmem_cache_create("sctp_chunk",
1110 sizeof(struct sctp_chunk),
1111 0, SLAB_HWCACHE_ALIGN,
Paul Mundt20c2df82007-07-20 10:11:58 +09001112 NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001113 if (!sctp_chunk_cachep)
1114 goto err_chunk_cachep;
1115
1116 /* Allocate and initialise sctp mibs. */
1117 status = init_sctp_mibs();
1118 if (status)
1119 goto err_init_mibs;
1120
1121 /* Initialize proc fs directory. */
1122 status = sctp_proc_init();
1123 if (status)
1124 goto err_init_proc;
1125
1126 /* Initialize object count debugging. */
1127 sctp_dbg_objcnt_init();
1128
Linus Torvalds1da177e2005-04-16 15:20:36 -07001129 /*
1130 * 14. Suggested SCTP Protocol Parameter Values
1131 */
1132 /* The following protocol parameters are RECOMMENDED: */
1133 /* RTO.Initial - 3 seconds */
1134 sctp_rto_initial = SCTP_RTO_INITIAL;
1135 /* RTO.Min - 1 second */
1136 sctp_rto_min = SCTP_RTO_MIN;
1137 /* RTO.Max - 60 seconds */
1138 sctp_rto_max = SCTP_RTO_MAX;
1139 /* RTO.Alpha - 1/8 */
1140 sctp_rto_alpha = SCTP_RTO_ALPHA;
1141 /* RTO.Beta - 1/4 */
1142 sctp_rto_beta = SCTP_RTO_BETA;
1143
1144 /* Valid.Cookie.Life - 60 seconds */
Vladislav Yasevich3fd091e2006-08-22 13:29:17 -07001145 sctp_valid_cookie_life = SCTP_DEFAULT_COOKIE_LIFE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001146
1147 /* Whether Cookie Preservative is enabled(1) or not(0) */
1148 sctp_cookie_preserve_enable = 1;
1149
1150 /* Max.Burst - 4 */
Vlad Yasevich70331572007-03-23 11:34:36 -07001151 sctp_max_burst = SCTP_DEFAULT_MAX_BURST;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001152
1153 /* Association.Max.Retrans - 10 attempts
1154 * Path.Max.Retrans - 5 attempts (per destination address)
1155 * Max.Init.Retransmits - 8 attempts
1156 */
1157 sctp_max_retrans_association = 10;
1158 sctp_max_retrans_path = 5;
1159 sctp_max_retrans_init = 8;
1160
Neil Horman4eb701d2005-04-28 12:02:04 -07001161 /* Sendbuffer growth - do per-socket accounting */
1162 sctp_sndbuf_policy = 0;
1163
Neil Horman049b3ff2005-11-11 16:08:24 -08001164 /* Rcvbuffer growth - do per-socket accounting */
1165 sctp_rcvbuf_policy = 0;
1166
Linus Torvalds1da177e2005-04-16 15:20:36 -07001167 /* HB.interval - 30 seconds */
Vlad Yasevich2f85a422005-06-28 13:24:23 -07001168 sctp_hb_interval = SCTP_DEFAULT_TIMEOUT_HEARTBEAT;
1169
1170 /* delayed SACK timeout */
1171 sctp_sack_timeout = SCTP_DEFAULT_TIMEOUT_SACK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001172
1173 /* Implementation specific variables. */
1174
1175 /* Initialize default stream count setup information. */
1176 sctp_max_instreams = SCTP_DEFAULT_INSTREAMS;
1177 sctp_max_outstreams = SCTP_DEFAULT_OUTSTREAMS;
1178
1179 /* Initialize handle used for association ids. */
1180 idr_init(&sctp_assocs_id);
1181
Neil Horman4d93df02007-08-15 16:07:44 -07001182 /* Set the pressure threshold to be a fraction of global memory that
1183 * is up to 1/2 at 256 MB, decreasing toward zero with the amount of
1184 * memory, with a floor of 128 pages.
1185 * Note this initalizes the data in sctpv6_prot too
1186 * Unabashedly stolen from tcp_init
1187 */
Vlad Yasevich845525a2008-07-18 23:08:21 -07001188 nr_pages = totalram_pages - totalhigh_pages;
1189 limit = min(nr_pages, 1UL<<(28-PAGE_SHIFT)) >> (20-PAGE_SHIFT);
1190 limit = (limit * (nr_pages >> (20-PAGE_SHIFT))) >> (PAGE_SHIFT-11);
Neil Horman4d93df02007-08-15 16:07:44 -07001191 limit = max(limit, 128UL);
1192 sysctl_sctp_mem[0] = limit / 4 * 3;
1193 sysctl_sctp_mem[1] = limit;
1194 sysctl_sctp_mem[2] = sysctl_sctp_mem[0] * 2;
1195
1196 /* Set per-socket limits to no more than 1/128 the pressure threshold*/
1197 limit = (sysctl_sctp_mem[1]) << (PAGE_SHIFT - 7);
1198 max_share = min(4UL*1024*1024, limit);
1199
Vlad Yasevich845525a2008-07-18 23:08:21 -07001200 sysctl_sctp_rmem[0] = SK_MEM_QUANTUM; /* give each asoc 1 page min */
Neil Horman4d93df02007-08-15 16:07:44 -07001201 sysctl_sctp_rmem[1] = (1500 *(sizeof(struct sk_buff) + 1));
1202 sysctl_sctp_rmem[2] = max(sysctl_sctp_rmem[1], max_share);
1203
Hideo Aoki3ab224b2007-12-31 00:11:19 -08001204 sysctl_sctp_wmem[0] = SK_MEM_QUANTUM;
Neil Horman4d93df02007-08-15 16:07:44 -07001205 sysctl_sctp_wmem[1] = 16*1024;
1206 sysctl_sctp_wmem[2] = max(64*1024, max_share);
1207
Linus Torvalds1da177e2005-04-16 15:20:36 -07001208 /* Size and allocate the association hash table.
1209 * The methodology is similar to that of the tcp hash tables.
1210 */
1211 if (num_physpages >= (128 * 1024))
1212 goal = num_physpages >> (22 - PAGE_SHIFT);
1213 else
1214 goal = num_physpages >> (24 - PAGE_SHIFT);
1215
1216 for (order = 0; (1UL << order) < goal; order++)
1217 ;
1218
1219 do {
1220 sctp_assoc_hashsize = (1UL << order) * PAGE_SIZE /
1221 sizeof(struct sctp_hashbucket);
1222 if ((sctp_assoc_hashsize > (64 * 1024)) && order > 0)
1223 continue;
1224 sctp_assoc_hashtable = (struct sctp_hashbucket *)
1225 __get_free_pages(GFP_ATOMIC, order);
1226 } while (!sctp_assoc_hashtable && --order > 0);
1227 if (!sctp_assoc_hashtable) {
1228 printk(KERN_ERR "SCTP: Failed association hash alloc.\n");
1229 status = -ENOMEM;
1230 goto err_ahash_alloc;
1231 }
1232 for (i = 0; i < sctp_assoc_hashsize; i++) {
1233 rwlock_init(&sctp_assoc_hashtable[i].lock);
Vlad Yasevichd970dbf2007-11-09 11:43:40 -05001234 INIT_HLIST_HEAD(&sctp_assoc_hashtable[i].chain);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001235 }
1236
1237 /* Allocate and initialize the endpoint hash table. */
1238 sctp_ep_hashsize = 64;
1239 sctp_ep_hashtable = (struct sctp_hashbucket *)
1240 kmalloc(64 * sizeof(struct sctp_hashbucket), GFP_KERNEL);
1241 if (!sctp_ep_hashtable) {
1242 printk(KERN_ERR "SCTP: Failed endpoint_hash alloc.\n");
1243 status = -ENOMEM;
1244 goto err_ehash_alloc;
1245 }
1246 for (i = 0; i < sctp_ep_hashsize; i++) {
1247 rwlock_init(&sctp_ep_hashtable[i].lock);
Vlad Yasevichd970dbf2007-11-09 11:43:40 -05001248 INIT_HLIST_HEAD(&sctp_ep_hashtable[i].chain);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001249 }
1250
1251 /* Allocate and initialize the SCTP port hash table. */
1252 do {
1253 sctp_port_hashsize = (1UL << order) * PAGE_SIZE /
1254 sizeof(struct sctp_bind_hashbucket);
1255 if ((sctp_port_hashsize > (64 * 1024)) && order > 0)
1256 continue;
1257 sctp_port_hashtable = (struct sctp_bind_hashbucket *)
1258 __get_free_pages(GFP_ATOMIC, order);
1259 } while (!sctp_port_hashtable && --order > 0);
1260 if (!sctp_port_hashtable) {
1261 printk(KERN_ERR "SCTP: Failed bind hash alloc.");
1262 status = -ENOMEM;
1263 goto err_bhash_alloc;
1264 }
1265 for (i = 0; i < sctp_port_hashsize; i++) {
1266 spin_lock_init(&sctp_port_hashtable[i].lock);
Vlad Yasevichd970dbf2007-11-09 11:43:40 -05001267 INIT_HLIST_HEAD(&sctp_port_hashtable[i].chain);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001268 }
1269
Linus Torvalds1da177e2005-04-16 15:20:36 -07001270 printk(KERN_INFO "SCTP: Hash tables configured "
1271 "(established %d bind %d)\n",
1272 sctp_assoc_hashsize, sctp_port_hashsize);
1273
1274 /* Disable ADDIP by default. */
1275 sctp_addip_enable = 0;
Vlad Yasevich73d9c4f2007-10-24 17:24:26 -04001276 sctp_addip_noauth = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001277
1278 /* Enable PR-SCTP by default. */
1279 sctp_prsctp_enable = 1;
1280
Vlad Yasevicha29a5bd2007-09-16 19:31:35 -07001281 /* Disable AUTH by default. */
1282 sctp_auth_enable = 0;
1283
Linus Torvalds1da177e2005-04-16 15:20:36 -07001284 sctp_sysctl_register();
1285
1286 INIT_LIST_HEAD(&sctp_address_families);
Vlad Yasevich270637a2008-03-20 15:17:14 -07001287 sctp_v4_pf_init();
1288 sctp_v6_pf_init();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001289
Vlad Yasevich270637a2008-03-20 15:17:14 -07001290 /* Initialize the local address list. */
1291 INIT_LIST_HEAD(&sctp_local_addr_list);
1292 spin_lock_init(&sctp_local_addr_lock);
1293 sctp_get_local_addr_list();
1294
1295 status = sctp_v4_protosw_init();
1296
Sridhar Samudrala827bf122007-05-04 13:36:30 -07001297 if (status)
Vlad Yasevich270637a2008-03-20 15:17:14 -07001298 goto err_protosw_init;
Sridhar Samudrala827bf122007-05-04 13:36:30 -07001299
Vlad Yasevich270637a2008-03-20 15:17:14 -07001300 status = sctp_v6_protosw_init();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001301 if (status)
Vlad Yasevich270637a2008-03-20 15:17:14 -07001302 goto err_v6_protosw_init;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001303
1304 /* Initialize the control inode/socket for handling OOTB packets. */
1305 if ((status = sctp_ctl_sock_init())) {
1306 printk (KERN_ERR
1307 "SCTP: Failed to initialize the SCTP control sock.\n");
1308 goto err_ctl_sock_init;
1309 }
1310
Vlad Yasevich270637a2008-03-20 15:17:14 -07001311 status = sctp_v4_add_protocol();
1312 if (status)
Sridhar Samudrala827bf122007-05-04 13:36:30 -07001313 goto err_add_protocol;
Sridhar Samudrala827bf122007-05-04 13:36:30 -07001314
1315 /* Register SCTP with inet6 layer. */
1316 status = sctp_v6_add_protocol();
1317 if (status)
1318 goto err_v6_add_protocol;
1319
Linus Torvalds1da177e2005-04-16 15:20:36 -07001320 status = 0;
1321out:
1322 return status;
Sridhar Samudrala827bf122007-05-04 13:36:30 -07001323err_v6_add_protocol:
Vlad Yasevich270637a2008-03-20 15:17:14 -07001324 sctp_v6_del_protocol();
Sridhar Samudrala827bf122007-05-04 13:36:30 -07001325err_add_protocol:
Vlad Yasevich270637a2008-03-20 15:17:14 -07001326 sctp_v4_del_protocol();
Denis V. Lunev56772422008-04-03 14:28:30 -07001327 inet_ctl_sock_destroy(sctp_ctl_sock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001328err_ctl_sock_init:
Vlad Yasevich270637a2008-03-20 15:17:14 -07001329 sctp_v6_protosw_exit();
1330err_v6_protosw_init:
1331 sctp_v4_protosw_exit();
1332err_protosw_init:
1333 sctp_free_local_addr_list();
1334 sctp_v4_pf_exit();
1335 sctp_v6_pf_exit();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001336 sctp_sysctl_unregister();
Neil Horman15efbe72008-02-15 09:53:59 -05001337 list_del(&sctp_af_inet.list);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001338 free_pages((unsigned long)sctp_port_hashtable,
1339 get_order(sctp_port_hashsize *
1340 sizeof(struct sctp_bind_hashbucket)));
1341err_bhash_alloc:
1342 kfree(sctp_ep_hashtable);
1343err_ehash_alloc:
1344 free_pages((unsigned long)sctp_assoc_hashtable,
1345 get_order(sctp_assoc_hashsize *
1346 sizeof(struct sctp_hashbucket)));
1347err_ahash_alloc:
1348 sctp_dbg_objcnt_exit();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001349 sctp_proc_exit();
Sridhar Samudrala827bf122007-05-04 13:36:30 -07001350err_init_proc:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001351 cleanup_sctp_mibs();
1352err_init_mibs:
1353 kmem_cache_destroy(sctp_chunk_cachep);
1354err_chunk_cachep:
1355 kmem_cache_destroy(sctp_bucket_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001356 goto out;
1357}
1358
1359/* Exit handler for the SCTP protocol. */
1360SCTP_STATIC __exit void sctp_exit(void)
1361{
1362 /* BUG. This should probably do something useful like clean
1363 * up all the remaining associations and all that memory.
1364 */
1365
Sridhar Samudrala827bf122007-05-04 13:36:30 -07001366 /* Unregister with inet6/inet layers. */
1367 sctp_v6_del_protocol();
Vlad Yasevich270637a2008-03-20 15:17:14 -07001368 sctp_v4_del_protocol();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001369
1370 /* Free the control endpoint. */
Denis V. Lunev56772422008-04-03 14:28:30 -07001371 inet_ctl_sock_destroy(sctp_ctl_sock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001372
Vlad Yasevich270637a2008-03-20 15:17:14 -07001373 /* Free protosw registrations */
1374 sctp_v6_protosw_exit();
1375 sctp_v4_protosw_exit();
1376
1377 /* Free the local address list. */
1378 sctp_free_local_addr_list();
Sridhar Samudrala827bf122007-05-04 13:36:30 -07001379
1380 /* Unregister with socket layer. */
Vlad Yasevich270637a2008-03-20 15:17:14 -07001381 sctp_v6_pf_exit();
1382 sctp_v4_pf_exit();
Sridhar Samudrala827bf122007-05-04 13:36:30 -07001383
Linus Torvalds1da177e2005-04-16 15:20:36 -07001384 sctp_sysctl_unregister();
Neil Horman15efbe72008-02-15 09:53:59 -05001385 list_del(&sctp_af_inet.list);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001386
1387 free_pages((unsigned long)sctp_assoc_hashtable,
1388 get_order(sctp_assoc_hashsize *
1389 sizeof(struct sctp_hashbucket)));
1390 kfree(sctp_ep_hashtable);
1391 free_pages((unsigned long)sctp_port_hashtable,
1392 get_order(sctp_port_hashsize *
1393 sizeof(struct sctp_bind_hashbucket)));
1394
Linus Torvalds1da177e2005-04-16 15:20:36 -07001395 sctp_dbg_objcnt_exit();
1396 sctp_proc_exit();
1397 cleanup_sctp_mibs();
1398
Sridhar Samudrala827bf122007-05-04 13:36:30 -07001399 kmem_cache_destroy(sctp_chunk_cachep);
1400 kmem_cache_destroy(sctp_bucket_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001401}
1402
1403module_init(sctp_init);
1404module_exit(sctp_exit);
1405
Arnaldo Carvalho de Melobb97d312005-08-09 20:19:14 -07001406/*
1407 * __stringify doesn't likes enums, so use IPPROTO_SCTP value (132) directly.
1408 */
1409MODULE_ALIAS("net-pf-" __stringify(PF_INET) "-proto-132");
Sridhar Samudrala882a3822006-12-13 16:33:35 -08001410MODULE_ALIAS("net-pf-" __stringify(PF_INET6) "-proto-132");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001411MODULE_AUTHOR("Linux Kernel SCTP developers <lksctp-developers@lists.sourceforge.net>");
1412MODULE_DESCRIPTION("Support for the SCTP protocol (RFC2960)");
1413MODULE_LICENSE("GPL");