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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>
Eric W. Biederman457c4cb2007-09-12 12:01:34 +020055#include <net/net_namespace.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070056#include <net/protocol.h>
57#include <net/ip.h>
58#include <net/ipv6.h>
Arnaldo Carvalho de Melo14c85022005-12-27 02:43:12 -020059#include <net/route.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070060#include <net/sctp/sctp.h>
61#include <net/addrconf.h>
62#include <net/inet_common.h>
63#include <net/inet_ecn.h>
64
65/* Global data structures. */
Brian Haley4cbf1ca2006-09-18 00:04:22 -070066struct sctp_globals sctp_globals __read_mostly;
Eric Dumazetba899662005-08-26 12:05:31 -070067DEFINE_SNMP_STAT(struct sctp_mib, sctp_statistics) __read_mostly;
Linus Torvalds1da177e2005-04-16 15:20:36 -070068
Florian Westphalc4e85f82008-07-18 23:03:44 -070069#ifdef CONFIG_PROC_FS
70struct proc_dir_entry *proc_net_sctp;
71#endif
72
Linus Torvalds1da177e2005-04-16 15:20:36 -070073struct idr sctp_assocs_id;
74DEFINE_SPINLOCK(sctp_assocs_id_lock);
75
76/* This is the global socket data structure used for responding to
77 * the Out-of-the-blue (OOTB) packets. A control sock will be created
78 * for this socket at the initialization time.
79 */
Denis V. Lunev82581752008-04-03 14:27:26 -070080static struct sock *sctp_ctl_sock;
Linus Torvalds1da177e2005-04-16 15:20:36 -070081
82static struct sctp_pf *sctp_pf_inet6_specific;
83static struct sctp_pf *sctp_pf_inet_specific;
84static struct sctp_af *sctp_af_v4_specific;
85static struct sctp_af *sctp_af_v6_specific;
86
Christoph Lametere18b8902006-12-06 20:33:20 -080087struct kmem_cache *sctp_chunk_cachep __read_mostly;
88struct kmem_cache *sctp_bucket_cachep __read_mostly;
Linus Torvalds1da177e2005-04-16 15:20:36 -070089
Vlad Yasevich007e3932007-09-16 16:04:37 -070090int sysctl_sctp_mem[3];
91int sysctl_sctp_rmem[3];
92int sysctl_sctp_wmem[3];
Neil Horman4d93df02007-08-15 16:07:44 -070093
Linus Torvalds1da177e2005-04-16 15:20:36 -070094/* Return the address of the control sock. */
95struct sock *sctp_get_ctl_sock(void)
96{
Denis V. Lunev82581752008-04-03 14:27:26 -070097 return sctp_ctl_sock;
Linus Torvalds1da177e2005-04-16 15:20:36 -070098}
99
100/* Set up the proc fs entry for the SCTP protocol. */
101static __init int sctp_proc_init(void)
102{
Florian Westphalc4e85f82008-07-18 23:03:44 -0700103#ifdef CONFIG_PROC_FS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104 if (!proc_net_sctp) {
105 struct proc_dir_entry *ent;
Eric W. Biederman457c4cb2007-09-12 12:01:34 +0200106 ent = proc_mkdir("sctp", init_net.proc_net);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107 if (ent) {
108 ent->owner = THIS_MODULE;
109 proc_net_sctp = ent;
110 } else
111 goto out_nomem;
112 }
113
114 if (sctp_snmp_proc_init())
Wei Yongjun80896a32008-06-16 16:59:55 -0700115 goto out_snmp_proc_init;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116 if (sctp_eps_proc_init())
Wei Yongjun80896a32008-06-16 16:59:55 -0700117 goto out_eps_proc_init;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118 if (sctp_assocs_proc_init())
Wei Yongjun80896a32008-06-16 16:59:55 -0700119 goto out_assocs_proc_init;
Neil Horman20c2c1f2008-05-09 15:14:50 -0700120 if (sctp_remaddr_proc_init())
David S. Millercaea9022008-06-16 18:25:48 -0700121 goto out_remaddr_proc_init;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122
123 return 0;
124
David S. Millercaea9022008-06-16 18:25:48 -0700125out_remaddr_proc_init:
Pavel Emelyanov3d00fb92008-06-17 15:54:14 -0700126 sctp_assocs_proc_exit();
Wei Yongjun80896a32008-06-16 16:59:55 -0700127out_assocs_proc_init:
128 sctp_eps_proc_exit();
129out_eps_proc_init:
130 sctp_snmp_proc_exit();
131out_snmp_proc_init:
132 if (proc_net_sctp) {
133 proc_net_sctp = NULL;
134 remove_proc_entry("sctp", init_net.proc_net);
135 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136out_nomem:
137 return -ENOMEM;
Florian Westphalc4e85f82008-07-18 23:03:44 -0700138#else
139 return 0;
140#endif /* CONFIG_PROC_FS */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141}
142
YOSHIFUJI Hideakid808ad92007-02-09 23:25:18 +0900143/* Clean up the proc fs entry for the SCTP protocol.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144 * Note: Do not make this __exit as it is used in the init error
145 * path.
146 */
147static void sctp_proc_exit(void)
148{
Florian Westphalc4e85f82008-07-18 23:03:44 -0700149#ifdef CONFIG_PROC_FS
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150 sctp_snmp_proc_exit();
151 sctp_eps_proc_exit();
152 sctp_assocs_proc_exit();
Neil Horman20c2c1f2008-05-09 15:14:50 -0700153 sctp_remaddr_proc_exit();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154
155 if (proc_net_sctp) {
156 proc_net_sctp = NULL;
Eric W. Biederman457c4cb2007-09-12 12:01:34 +0200157 remove_proc_entry("sctp", init_net.proc_net);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158 }
Florian Westphalc4e85f82008-07-18 23:03:44 -0700159#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160}
161
162/* Private helper to extract ipv4 address and stash them in
163 * the protocol structure.
164 */
165static void sctp_v4_copy_addrlist(struct list_head *addrlist,
166 struct net_device *dev)
167{
168 struct in_device *in_dev;
169 struct in_ifaddr *ifa;
170 struct sctp_sockaddr_entry *addr;
171
172 rcu_read_lock();
Herbert Xue5ed6392005-10-03 14:35:55 -0700173 if ((in_dev = __in_dev_get_rcu(dev)) == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174 rcu_read_unlock();
175 return;
176 }
177
178 for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
179 /* Add the address to the local list. */
180 addr = t_new(struct sctp_sockaddr_entry, GFP_ATOMIC);
181 if (addr) {
Al Viro2a6fd782006-11-20 17:04:42 -0800182 addr->a.v4.sin_family = AF_INET;
183 addr->a.v4.sin_port = 0;
184 addr->a.v4.sin_addr.s_addr = ifa->ifa_local;
Vlad Yasevich29303542007-09-16 16:02:12 -0700185 addr->valid = 1;
186 INIT_LIST_HEAD(&addr->list);
187 INIT_RCU_HEAD(&addr->rcu);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188 list_add_tail(&addr->list, addrlist);
189 }
190 }
191
192 rcu_read_unlock();
193}
194
195/* Extract our IP addresses from the system and stash them in the
196 * protocol structure.
197 */
Sridhar Samudrala29c7cf92006-12-13 16:26:26 -0800198static void sctp_get_local_addr_list(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199{
200 struct net_device *dev;
201 struct list_head *pos;
202 struct sctp_af *af;
203
204 read_lock(&dev_base_lock);
Eric W. Biederman881d9662007-09-17 11:56:21 -0700205 for_each_netdev(&init_net, dev) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206 __list_for_each(pos, &sctp_address_families) {
207 af = list_entry(pos, struct sctp_af, list);
208 af->copy_addrlist(&sctp_local_addr_list, dev);
209 }
210 }
211 read_unlock(&dev_base_lock);
212}
213
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214/* Free the existing local addresses. */
Sridhar Samudrala29c7cf92006-12-13 16:26:26 -0800215static void sctp_free_local_addr_list(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216{
217 struct sctp_sockaddr_entry *addr;
218 struct list_head *pos, *temp;
219
220 list_for_each_safe(pos, temp, &sctp_local_addr_list) {
221 addr = list_entry(pos, struct sctp_sockaddr_entry, list);
222 list_del(pos);
223 kfree(addr);
224 }
225}
226
Vlad Yasevich29303542007-09-16 16:02:12 -0700227void sctp_local_addr_free(struct rcu_head *head)
228{
229 struct sctp_sockaddr_entry *e = container_of(head,
230 struct sctp_sockaddr_entry, rcu);
231 kfree(e);
232}
233
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234/* Copy the local addresses which are valid for 'scope' into 'bp'. */
235int sctp_copy_local_addr_list(struct sctp_bind_addr *bp, sctp_scope_t scope,
Al Virodd0fc662005-10-07 07:46:04 +0100236 gfp_t gfp, int copy_flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237{
238 struct sctp_sockaddr_entry *addr;
239 int error = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240
Vlad Yasevich29303542007-09-16 16:02:12 -0700241 rcu_read_lock();
242 list_for_each_entry_rcu(addr, &sctp_local_addr_list, list) {
243 if (!addr->valid)
244 continue;
Al Viro6244be42006-11-20 17:21:44 -0800245 if (sctp_in_scope(&addr->a, scope)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246 /* Now that the address is in scope, check to see if
247 * the address type is really supported by the local
248 * sock as well as the remote peer.
249 */
Al Viro6244be42006-11-20 17:21:44 -0800250 if ((((AF_INET == addr->a.sa.sa_family) &&
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251 (copy_flags & SCTP_ADDR4_PEERSUPP))) ||
Al Viro6244be42006-11-20 17:21:44 -0800252 (((AF_INET6 == addr->a.sa.sa_family) &&
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253 (copy_flags & SCTP_ADDR6_ALLOWED) &&
254 (copy_flags & SCTP_ADDR6_PEERSUPP)))) {
Vlad Yasevichf57d96b2007-12-20 14:12:24 -0800255 error = sctp_add_bind_addr(bp, &addr->a,
256 SCTP_ADDR_SRC, GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257 if (error)
258 goto end_copy;
259 }
260 }
261 }
262
263end_copy:
Vlad Yasevich29303542007-09-16 16:02:12 -0700264 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265 return error;
266}
267
268/* Initialize a sctp_addr from in incoming skb. */
269static void sctp_v4_from_skb(union sctp_addr *addr, struct sk_buff *skb,
270 int is_saddr)
271{
272 void *from;
Al Virod55c41b2006-11-20 17:09:40 -0800273 __be16 *port;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274 struct sctphdr *sh;
275
276 port = &addr->v4.sin_port;
277 addr->v4.sin_family = AF_INET;
278
Arnaldo Carvalho de Melo2c0fd382007-03-13 13:59:32 -0300279 sh = sctp_hdr(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280 if (is_saddr) {
Al Virod55c41b2006-11-20 17:09:40 -0800281 *port = sh->source;
Arnaldo Carvalho de Meloeddc9ec2007-04-20 22:47:35 -0700282 from = &ip_hdr(skb)->saddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283 } else {
Al Virod55c41b2006-11-20 17:09:40 -0800284 *port = sh->dest;
Arnaldo Carvalho de Meloeddc9ec2007-04-20 22:47:35 -0700285 from = &ip_hdr(skb)->daddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286 }
287 memcpy(&addr->v4.sin_addr.s_addr, from, sizeof(struct in_addr));
288}
289
290/* Initialize an sctp_addr from a socket. */
291static void sctp_v4_from_sk(union sctp_addr *addr, struct sock *sk)
292{
293 addr->v4.sin_family = AF_INET;
Al Viro7dcdbd92006-11-20 17:24:21 -0800294 addr->v4.sin_port = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295 addr->v4.sin_addr.s_addr = inet_sk(sk)->rcv_saddr;
296}
297
298/* Initialize sk->sk_rcv_saddr from sctp_addr. */
299static void sctp_v4_to_sk_saddr(union sctp_addr *addr, struct sock *sk)
300{
301 inet_sk(sk)->rcv_saddr = addr->v4.sin_addr.s_addr;
302}
303
304/* Initialize sk->sk_daddr from sctp_addr. */
305static void sctp_v4_to_sk_daddr(union sctp_addr *addr, struct sock *sk)
306{
307 inet_sk(sk)->daddr = addr->v4.sin_addr.s_addr;
308}
309
310/* Initialize a sctp_addr from an address parameter. */
311static void sctp_v4_from_addr_param(union sctp_addr *addr,
312 union sctp_addr_param *param,
Al Virodd86d132006-11-20 17:11:13 -0800313 __be16 port, int iif)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314{
315 addr->v4.sin_family = AF_INET;
316 addr->v4.sin_port = port;
317 addr->v4.sin_addr.s_addr = param->v4.addr.s_addr;
318}
319
320/* Initialize an address parameter from a sctp_addr and return the length
321 * of the address parameter.
322 */
323static int sctp_v4_to_addr_param(const union sctp_addr *addr,
324 union sctp_addr_param *param)
325{
326 int length = sizeof(sctp_ipv4addr_param_t);
327
328 param->v4.param_hdr.type = SCTP_PARAM_IPV4_ADDRESS;
Al Virodbc16db2006-11-20 17:01:42 -0800329 param->v4.param_hdr.length = htons(length);
YOSHIFUJI Hideakid808ad92007-02-09 23:25:18 +0900330 param->v4.addr.s_addr = addr->v4.sin_addr.s_addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331
332 return length;
333}
334
335/* Initialize a sctp_addr from a dst_entry. */
336static void sctp_v4_dst_saddr(union sctp_addr *saddr, struct dst_entry *dst,
Al Viro854d43a2006-11-20 17:06:24 -0800337 __be16 port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338{
339 struct rtable *rt = (struct rtable *)dst;
340 saddr->v4.sin_family = AF_INET;
341 saddr->v4.sin_port = port;
342 saddr->v4.sin_addr.s_addr = rt->rt_src;
343}
344
345/* Compare two addresses exactly. */
346static int sctp_v4_cmp_addr(const union sctp_addr *addr1,
347 const union sctp_addr *addr2)
348{
349 if (addr1->sa.sa_family != addr2->sa.sa_family)
350 return 0;
351 if (addr1->v4.sin_port != addr2->v4.sin_port)
352 return 0;
353 if (addr1->v4.sin_addr.s_addr != addr2->v4.sin_addr.s_addr)
354 return 0;
355
356 return 1;
357}
358
359/* Initialize addr struct to INADDR_ANY. */
Al Viro6fbfa9f2006-11-20 17:24:53 -0800360static void sctp_v4_inaddr_any(union sctp_addr *addr, __be16 port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361{
362 addr->v4.sin_family = AF_INET;
Al Viroe6f1ceb2008-03-17 22:44:53 -0700363 addr->v4.sin_addr.s_addr = htonl(INADDR_ANY);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364 addr->v4.sin_port = port;
365}
366
367/* Is this a wildcard address? */
368static int sctp_v4_is_any(const union sctp_addr *addr)
369{
Al Viroe6f1ceb2008-03-17 22:44:53 -0700370 return htonl(INADDR_ANY) == addr->v4.sin_addr.s_addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371}
372
373/* This function checks if the address is a valid address to be used for
374 * SCTP binding.
375 *
376 * Output:
377 * Return 0 - If the address is a non-unicast or an illegal address.
378 * Return 1 - If the address is a unicast.
379 */
Vlad Yasevich5636bef2006-06-17 22:55:35 -0700380static int sctp_v4_addr_valid(union sctp_addr *addr,
381 struct sctp_sock *sp,
382 const struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383{
384 /* Is this a non-unicast address or a unusable SCTP address? */
Joe Perchesb5cb2bb2007-12-16 13:46:59 -0800385 if (IS_IPV4_UNUSABLE_ADDRESS(addr->v4.sin_addr.s_addr))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386 return 0;
387
YOSHIFUJI Hideakid808ad92007-02-09 23:25:18 +0900388 /* Is this a broadcast address? */
Eric Dumazetee6b9672008-03-05 18:30:47 -0800389 if (skb && skb->rtable->rt_flags & RTCF_BROADCAST)
YOSHIFUJI Hideakid808ad92007-02-09 23:25:18 +0900390 return 0;
Vlad Yasevich5636bef2006-06-17 22:55:35 -0700391
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392 return 1;
393}
394
395/* Should this be available for binding? */
396static int sctp_v4_available(union sctp_addr *addr, struct sctp_sock *sp)
397{
Eric W. Biederman6b175b22008-01-10 03:25:28 -0800398 int ret = inet_addr_type(&init_net, addr->v4.sin_addr.s_addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400
Al Viroe6f1ceb2008-03-17 22:44:53 -0700401 if (addr->v4.sin_addr.s_addr != htonl(INADDR_ANY) &&
Neil Hormancdac4e02005-06-13 15:12:33 -0700402 ret != RTN_LOCAL &&
403 !sp->inet.freebind &&
404 !sysctl_ip_nonlocal_bind)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405 return 0;
Neil Hormancdac4e02005-06-13 15:12:33 -0700406
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407 return 1;
408}
409
410/* Checking the loopback, private and other address scopes as defined in
411 * RFC 1918. The IPv4 scoping is based on the draft for SCTP IPv4
412 * scoping <draft-stewart-tsvwg-sctp-ipv4-00.txt>.
413 *
414 * Level 0 - unusable SCTP addresses
415 * Level 1 - loopback address
416 * Level 2 - link-local addresses
417 * Level 3 - private addresses.
418 * Level 4 - global addresses
419 * For INIT and INIT-ACK address list, let L be the level of
420 * of requested destination address, sender and receiver
421 * SHOULD include all of its addresses with level greater
422 * than or equal to L.
423 */
424static sctp_scope_t sctp_v4_scope(union sctp_addr *addr)
425{
426 sctp_scope_t retval;
427
428 /* Should IPv4 scoping be a sysctl configurable option
429 * so users can turn it off (default on) for certain
430 * unconventional networking environments?
431 */
432
433 /* Check for unusable SCTP addresses. */
Joe Perchesb5cb2bb2007-12-16 13:46:59 -0800434 if (IS_IPV4_UNUSABLE_ADDRESS(addr->v4.sin_addr.s_addr)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435 retval = SCTP_SCOPE_UNUSABLE;
Joe Perchesb5cb2bb2007-12-16 13:46:59 -0800436 } else if (ipv4_is_loopback(addr->v4.sin_addr.s_addr)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437 retval = SCTP_SCOPE_LOOPBACK;
Joe Perchesb5cb2bb2007-12-16 13:46:59 -0800438 } else if (ipv4_is_linklocal_169(addr->v4.sin_addr.s_addr)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439 retval = SCTP_SCOPE_LINK;
Joe Perchesb5cb2bb2007-12-16 13:46:59 -0800440 } else if (ipv4_is_private_10(addr->v4.sin_addr.s_addr) ||
441 ipv4_is_private_172(addr->v4.sin_addr.s_addr) ||
442 ipv4_is_private_192(addr->v4.sin_addr.s_addr)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443 retval = SCTP_SCOPE_PRIVATE;
444 } else {
445 retval = SCTP_SCOPE_GLOBAL;
446 }
447
448 return retval;
449}
450
451/* Returns a valid dst cache entry for the given source and destination ip
452 * addresses. If an association is passed, trys to get a dst entry with a
453 * source address that matches an address in the bind address list.
454 */
455static struct dst_entry *sctp_v4_get_dst(struct sctp_association *asoc,
456 union sctp_addr *daddr,
457 union sctp_addr *saddr)
458{
459 struct rtable *rt;
460 struct flowi fl;
461 struct sctp_bind_addr *bp;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462 struct sctp_sockaddr_entry *laddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463 struct dst_entry *dst = NULL;
464 union sctp_addr dst_saddr;
465
466 memset(&fl, 0x0, sizeof(struct flowi));
467 fl.fl4_dst = daddr->v4.sin_addr.s_addr;
468 fl.proto = IPPROTO_SCTP;
469 if (asoc) {
470 fl.fl4_tos = RT_CONN_FLAGS(asoc->base.sk);
471 fl.oif = asoc->base.sk->sk_bound_dev_if;
472 }
473 if (saddr)
474 fl.fl4_src = saddr->v4.sin_addr.s_addr;
475
476 SCTP_DEBUG_PRINTK("%s: DST:%u.%u.%u.%u, SRC:%u.%u.%u.%u - ",
Harvey Harrison0dc47872008-03-05 20:47:47 -0800477 __func__, NIPQUAD(fl.fl4_dst),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478 NIPQUAD(fl.fl4_src));
479
Denis V. Lunevf2063512008-01-22 22:07:34 -0800480 if (!ip_route_output_key(&init_net, &rt, &fl)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481 dst = &rt->u.dst;
482 }
483
484 /* If there is no association or if a source address is passed, no
485 * more validation is required.
486 */
487 if (!asoc || saddr)
488 goto out;
489
490 bp = &asoc->base.bind_addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491
492 if (dst) {
493 /* Walk through the bind address list and look for a bind
494 * address that matches the source address of the returned dst.
495 */
Gui Jianfeng159c6be2008-06-04 12:38:07 -0700496 sctp_v4_dst_saddr(&dst_saddr, dst, htons(bp->port));
Vlad Yasevich559cf712007-09-16 16:03:28 -0700497 rcu_read_lock();
498 list_for_each_entry_rcu(laddr, &bp->address_list, list) {
Vlad Yasevichf57d96b2007-12-20 14:12:24 -0800499 if (!laddr->valid || (laddr->state != SCTP_ADDR_SRC))
Sridhar Samudraladc022a92006-07-21 14:49:25 -0700500 continue;
Al Viro854d43a2006-11-20 17:06:24 -0800501 if (sctp_v4_cmp_addr(&dst_saddr, &laddr->a))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502 goto out_unlock;
503 }
Vlad Yasevich559cf712007-09-16 16:03:28 -0700504 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505
506 /* None of the bound addresses match the source address of the
507 * dst. So release it.
508 */
509 dst_release(dst);
510 dst = NULL;
511 }
512
513 /* Walk through the bind address list and try to get a dst that
514 * matches a bind address as the source address.
515 */
Vlad Yasevich559cf712007-09-16 16:03:28 -0700516 rcu_read_lock();
517 list_for_each_entry_rcu(laddr, &bp->address_list, list) {
518 if (!laddr->valid)
519 continue;
Vlad Yasevichf57d96b2007-12-20 14:12:24 -0800520 if ((laddr->state == SCTP_ADDR_SRC) &&
Al Viro6244be42006-11-20 17:21:44 -0800521 (AF_INET == laddr->a.sa.sa_family)) {
522 fl.fl4_src = laddr->a.v4.sin_addr.s_addr;
Denis V. Lunevf2063512008-01-22 22:07:34 -0800523 if (!ip_route_output_key(&init_net, &rt, &fl)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700524 dst = &rt->u.dst;
525 goto out_unlock;
526 }
527 }
528 }
529
530out_unlock:
Vlad Yasevich559cf712007-09-16 16:03:28 -0700531 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532out:
533 if (dst)
534 SCTP_DEBUG_PRINTK("rt_dst:%u.%u.%u.%u, rt_src:%u.%u.%u.%u\n",
YOSHIFUJI Hideakid808ad92007-02-09 23:25:18 +0900535 NIPQUAD(rt->rt_dst), NIPQUAD(rt->rt_src));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536 else
537 SCTP_DEBUG_PRINTK("NO ROUTE\n");
538
539 return dst;
540}
541
542/* For v4, the source address is cached in the route entry(dst). So no need
543 * to cache it separately and hence this is an empty routine.
544 */
YOSHIFUJI Hideakie5117102008-05-29 19:55:05 +0900545static void sctp_v4_get_saddr(struct sctp_sock *sk,
546 struct sctp_association *asoc,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700547 struct dst_entry *dst,
548 union sctp_addr *daddr,
549 union sctp_addr *saddr)
550{
551 struct rtable *rt = (struct rtable *)dst;
552
Vladislav Yasevich23ec47a2005-11-11 16:05:55 -0800553 if (!asoc)
554 return;
555
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556 if (rt) {
557 saddr->v4.sin_family = AF_INET;
Al Virod3f7a542006-11-20 17:12:41 -0800558 saddr->v4.sin_port = htons(asoc->base.bind_addr.port);
YOSHIFUJI Hideakid808ad92007-02-09 23:25:18 +0900559 saddr->v4.sin_addr.s_addr = rt->rt_src;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560 }
561}
562
563/* What interface did this skb arrive on? */
564static int sctp_v4_skb_iif(const struct sk_buff *skb)
565{
Eric Dumazetee6b9672008-03-05 18:30:47 -0800566 return skb->rtable->rt_iif;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700567}
568
569/* Was this packet marked by Explicit Congestion Notification? */
570static int sctp_v4_is_ce(const struct sk_buff *skb)
571{
Arnaldo Carvalho de Meloeddc9ec2007-04-20 22:47:35 -0700572 return INET_ECN_is_ce(ip_hdr(skb)->tos);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573}
574
575/* Create and initialize a new sk for the socket returned by accept(). */
576static struct sock *sctp_v4_create_accept_sk(struct sock *sk,
577 struct sctp_association *asoc)
578{
579 struct inet_sock *inet = inet_sk(sk);
580 struct inet_sock *newinet;
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +0900581 struct sock *newsk = sk_alloc(sock_net(sk), PF_INET, GFP_KERNEL,
Pavel Emelyanov6257ff22007-11-01 00:39:31 -0700582 sk->sk_prot);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583
584 if (!newsk)
585 goto out;
586
587 sock_init_data(NULL, newsk);
588
589 newsk->sk_type = SOCK_STREAM;
590
591 newsk->sk_no_check = sk->sk_no_check;
592 newsk->sk_reuse = sk->sk_reuse;
593 newsk->sk_shutdown = sk->sk_shutdown;
594
595 newsk->sk_destruct = inet_sock_destruct;
596 newsk->sk_family = PF_INET;
597 newsk->sk_protocol = IPPROTO_SCTP;
598 newsk->sk_backlog_rcv = sk->sk_prot->backlog_rcv;
599 sock_reset_flag(newsk, SOCK_ZAPPED);
600
601 newinet = inet_sk(newsk);
602
603 /* Initialize sk's sport, dport, rcv_saddr and daddr for
604 * getsockname() and getpeername()
605 */
606 newinet->sport = inet->sport;
607 newinet->saddr = inet->saddr;
608 newinet->rcv_saddr = inet->rcv_saddr;
609 newinet->dport = htons(asoc->peer.port);
610 newinet->daddr = asoc->peer.primary_addr.v4.sin_addr.s_addr;
611 newinet->pmtudisc = inet->pmtudisc;
YOSHIFUJI Hideakid808ad92007-02-09 23:25:18 +0900612 newinet->id = asoc->next_tsn ^ jiffies;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700613
614 newinet->uc_ttl = -1;
615 newinet->mc_loop = 1;
616 newinet->mc_ttl = 1;
617 newinet->mc_index = 0;
618 newinet->mc_list = NULL;
619
Arnaldo Carvalho de Meloe6848972005-08-09 19:45:38 -0700620 sk_refcnt_debug_inc(newsk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700621
622 if (newsk->sk_prot->init(newsk)) {
623 sk_common_release(newsk);
624 newsk = NULL;
625 }
626
627out:
628 return newsk;
629}
630
631/* Map address, empty for v4 family */
632static void sctp_v4_addr_v4map(struct sctp_sock *sp, union sctp_addr *addr)
633{
634 /* Empty */
635}
636
637/* Dump the v4 addr to the seq file. */
638static void sctp_v4_seq_dump_addr(struct seq_file *seq, union sctp_addr *addr)
639{
640 seq_printf(seq, "%d.%d.%d.%d ", NIPQUAD(addr->v4.sin_addr));
641}
642
Vlad Yasevichb9031d92008-06-04 12:40:15 -0700643static void sctp_v4_ecn_capable(struct sock *sk)
644{
645 INET_ECN_xmit(sk);
646}
647
Vlad Yasevich29303542007-09-16 16:02:12 -0700648/* Event handler for inet address addition/deletion events.
649 * The sctp_local_addr_list needs to be protocted by a spin lock since
650 * multiple notifiers (say IPv4 and IPv6) may be running at the same
651 * time and thus corrupt the list.
652 * The reader side is protected with RCU.
653 */
Adrian Bunk24123182006-12-20 16:08:22 -0800654static int sctp_inetaddr_event(struct notifier_block *this, unsigned long ev,
655 void *ptr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656{
Sridhar Samudrala29c7cf92006-12-13 16:26:26 -0800657 struct in_ifaddr *ifa = (struct in_ifaddr *)ptr;
Vlad Yasevich29303542007-09-16 16:02:12 -0700658 struct sctp_sockaddr_entry *addr = NULL;
659 struct sctp_sockaddr_entry *temp;
Chidambar 'ilLogict' Zinnoury22626212008-03-11 18:05:02 -0700660 int found = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700661
YOSHIFUJI Hideakic346dca2008-03-25 21:47:49 +0900662 if (dev_net(ifa->ifa_dev->dev) != &init_net)
Denis V. Lunev6133fb12008-02-28 20:46:17 -0800663 return NOTIFY_DONE;
664
Sridhar Samudrala29c7cf92006-12-13 16:26:26 -0800665 switch (ev) {
666 case NETDEV_UP:
667 addr = kmalloc(sizeof(struct sctp_sockaddr_entry), GFP_ATOMIC);
668 if (addr) {
669 addr->a.v4.sin_family = AF_INET;
670 addr->a.v4.sin_port = 0;
671 addr->a.v4.sin_addr.s_addr = ifa->ifa_local;
Vlad Yasevich29303542007-09-16 16:02:12 -0700672 addr->valid = 1;
673 spin_lock_bh(&sctp_local_addr_lock);
674 list_add_tail_rcu(&addr->list, &sctp_local_addr_list);
675 spin_unlock_bh(&sctp_local_addr_lock);
Sridhar Samudrala29c7cf92006-12-13 16:26:26 -0800676 }
677 break;
678 case NETDEV_DOWN:
Vlad Yasevich29303542007-09-16 16:02:12 -0700679 spin_lock_bh(&sctp_local_addr_lock);
680 list_for_each_entry_safe(addr, temp,
681 &sctp_local_addr_list, list) {
Pavel Emelyanova40a7d12008-04-12 18:40:38 -0700682 if (addr->a.sa.sa_family == AF_INET &&
683 addr->a.v4.sin_addr.s_addr ==
684 ifa->ifa_local) {
Chidambar 'ilLogict' Zinnoury22626212008-03-11 18:05:02 -0700685 found = 1;
Vlad Yasevich29303542007-09-16 16:02:12 -0700686 addr->valid = 0;
687 list_del_rcu(&addr->list);
Sridhar Samudrala29c7cf92006-12-13 16:26:26 -0800688 break;
689 }
690 }
Vlad Yasevich29303542007-09-16 16:02:12 -0700691 spin_unlock_bh(&sctp_local_addr_lock);
Chidambar 'ilLogict' Zinnoury22626212008-03-11 18:05:02 -0700692 if (found)
Vlad Yasevich29303542007-09-16 16:02:12 -0700693 call_rcu(&addr->rcu, sctp_local_addr_free);
Sridhar Samudrala29c7cf92006-12-13 16:26:26 -0800694 break;
695 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700696
697 return NOTIFY_DONE;
698}
699
700/*
701 * Initialize the control inode/socket with a control endpoint data
702 * structure. This endpoint is reserved exclusively for the OOTB processing.
703 */
704static int sctp_ctl_sock_init(void)
705{
706 int err;
707 sa_family_t family;
708
709 if (sctp_get_pf_specific(PF_INET6))
710 family = PF_INET6;
711 else
712 family = PF_INET;
713
Denis V. Luneveee4fe42008-04-03 14:27:58 -0700714 err = inet_ctl_sock_create(&sctp_ctl_sock, family,
Denis V. Lunev56772422008-04-03 14:28:30 -0700715 SOCK_SEQPACKET, IPPROTO_SCTP, &init_net);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700716 if (err < 0) {
717 printk(KERN_ERR
718 "SCTP: Failed to create the SCTP control socket.\n");
719 return err;
720 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721 return 0;
722}
723
724/* Register address family specific functions. */
725int sctp_register_af(struct sctp_af *af)
726{
727 switch (af->sa_family) {
728 case AF_INET:
729 if (sctp_af_v4_specific)
730 return 0;
731 sctp_af_v4_specific = af;
732 break;
733 case AF_INET6:
734 if (sctp_af_v6_specific)
735 return 0;
736 sctp_af_v6_specific = af;
737 break;
738 default:
739 return 0;
740 }
741
742 INIT_LIST_HEAD(&af->list);
743 list_add_tail(&af->list, &sctp_address_families);
744 return 1;
745}
746
747/* Get the table of functions for manipulating a particular address
748 * family.
749 */
750struct sctp_af *sctp_get_af_specific(sa_family_t family)
751{
752 switch (family) {
753 case AF_INET:
754 return sctp_af_v4_specific;
755 case AF_INET6:
756 return sctp_af_v6_specific;
757 default:
758 return NULL;
759 }
760}
761
762/* Common code to initialize a AF_INET msg_name. */
763static void sctp_inet_msgname(char *msgname, int *addr_len)
764{
765 struct sockaddr_in *sin;
766
767 sin = (struct sockaddr_in *)msgname;
768 *addr_len = sizeof(struct sockaddr_in);
769 sin->sin_family = AF_INET;
770 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
771}
772
773/* Copy the primary address of the peer primary address as the msg_name. */
774static void sctp_inet_event_msgname(struct sctp_ulpevent *event, char *msgname,
775 int *addr_len)
776{
777 struct sockaddr_in *sin, *sinfrom;
778
779 if (msgname) {
780 struct sctp_association *asoc;
781
782 asoc = event->asoc;
783 sctp_inet_msgname(msgname, addr_len);
784 sin = (struct sockaddr_in *)msgname;
785 sinfrom = &asoc->peer.primary_addr.v4;
786 sin->sin_port = htons(asoc->peer.port);
787 sin->sin_addr.s_addr = sinfrom->sin_addr.s_addr;
788 }
789}
790
791/* Initialize and copy out a msgname from an inbound skb. */
792static void sctp_inet_skb_msgname(struct sk_buff *skb, char *msgname, int *len)
793{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700794 if (msgname) {
Arnaldo Carvalho de Melo2c0fd382007-03-13 13:59:32 -0300795 struct sctphdr *sh = sctp_hdr(skb);
796 struct sockaddr_in *sin = (struct sockaddr_in *)msgname;
797
Linus Torvalds1da177e2005-04-16 15:20:36 -0700798 sctp_inet_msgname(msgname, len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700799 sin->sin_port = sh->source;
Arnaldo Carvalho de Meloeddc9ec2007-04-20 22:47:35 -0700800 sin->sin_addr.s_addr = ip_hdr(skb)->saddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700801 }
802}
803
804/* Do we support this AF? */
805static int sctp_inet_af_supported(sa_family_t family, struct sctp_sock *sp)
806{
807 /* PF_INET only supports AF_INET addresses. */
808 return (AF_INET == family);
809}
810
811/* Address matching with wildcards allowed. */
812static int sctp_inet_cmp_addr(const union sctp_addr *addr1,
813 const union sctp_addr *addr2,
814 struct sctp_sock *opt)
815{
816 /* PF_INET only supports AF_INET addresses. */
817 if (addr1->sa.sa_family != addr2->sa.sa_family)
818 return 0;
Al Viroe6f1ceb2008-03-17 22:44:53 -0700819 if (htonl(INADDR_ANY) == addr1->v4.sin_addr.s_addr ||
820 htonl(INADDR_ANY) == addr2->v4.sin_addr.s_addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700821 return 1;
822 if (addr1->v4.sin_addr.s_addr == addr2->v4.sin_addr.s_addr)
823 return 1;
824
825 return 0;
826}
827
828/* Verify that provided sockaddr looks bindable. Common verification has
829 * already been taken care of.
830 */
831static int sctp_inet_bind_verify(struct sctp_sock *opt, union sctp_addr *addr)
832{
833 return sctp_v4_available(addr, opt);
834}
835
836/* Verify that sockaddr looks sendable. Common verification has already
837 * been taken care of.
838 */
839static int sctp_inet_send_verify(struct sctp_sock *opt, union sctp_addr *addr)
840{
841 return 1;
842}
843
844/* Fill in Supported Address Type information for INIT and INIT-ACK
845 * chunks. Returns number of addresses supported.
846 */
847static int sctp_inet_supported_addrs(const struct sctp_sock *opt,
Al Viro3dbe8652006-11-20 17:25:49 -0800848 __be16 *types)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700849{
850 types[0] = SCTP_PARAM_IPV4_ADDRESS;
851 return 1;
852}
853
854/* Wrapper routine that calls the ip transmit routine. */
855static inline int sctp_v4_xmit(struct sk_buff *skb,
856 struct sctp_transport *transport, int ipfragok)
857{
858 SCTP_DEBUG_PRINTK("%s: skb:%p, len:%d, "
859 "src:%u.%u.%u.%u, dst:%u.%u.%u.%u\n",
Harvey Harrison0dc47872008-03-05 20:47:47 -0800860 __func__, skb, skb->len,
Eric Dumazetee6b9672008-03-05 18:30:47 -0800861 NIPQUAD(skb->rtable->rt_src),
862 NIPQUAD(skb->rtable->rt_dst));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700863
864 SCTP_INC_STATS(SCTP_MIB_OUTSCTPPACKS);
David S. Millere89862f2007-01-26 01:04:55 -0800865 return ip_queue_xmit(skb, ipfragok);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700866}
867
Neil Horman15efbe72008-02-15 09:53:59 -0500868static struct sctp_af sctp_af_inet;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700869
870static struct sctp_pf sctp_pf_inet = {
871 .event_msgname = sctp_inet_event_msgname,
872 .skb_msgname = sctp_inet_skb_msgname,
873 .af_supported = sctp_inet_af_supported,
874 .cmp_addr = sctp_inet_cmp_addr,
875 .bind_verify = sctp_inet_bind_verify,
876 .send_verify = sctp_inet_send_verify,
877 .supported_addrs = sctp_inet_supported_addrs,
878 .create_accept_sk = sctp_v4_create_accept_sk,
879 .addr_v4map = sctp_v4_addr_v4map,
Neil Horman15efbe72008-02-15 09:53:59 -0500880 .af = &sctp_af_inet
Linus Torvalds1da177e2005-04-16 15:20:36 -0700881};
882
883/* Notifier for inetaddr addition/deletion events. */
884static struct notifier_block sctp_inetaddr_notifier = {
885 .notifier_call = sctp_inetaddr_event,
886};
887
888/* Socket operations. */
Eric Dumazet90ddc4f2005-12-22 12:49:22 -0800889static const struct proto_ops inet_seqpacket_ops = {
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800890 .family = PF_INET,
891 .owner = THIS_MODULE,
892 .release = inet_release, /* Needs to be wrapped... */
893 .bind = inet_bind,
894 .connect = inet_dgram_connect,
895 .socketpair = sock_no_socketpair,
896 .accept = inet_accept,
897 .getname = inet_getname, /* Semantics are different. */
898 .poll = sctp_poll,
899 .ioctl = inet_ioctl,
900 .listen = sctp_inet_listen,
901 .shutdown = inet_shutdown, /* Looks harmless. */
902 .setsockopt = sock_common_setsockopt, /* IP_SOL IP_OPTION is a problem */
903 .getsockopt = sock_common_getsockopt,
904 .sendmsg = inet_sendmsg,
905 .recvmsg = sock_common_recvmsg,
906 .mmap = sock_no_mmap,
907 .sendpage = sock_no_sendpage,
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800908#ifdef CONFIG_COMPAT
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800909 .compat_setsockopt = compat_sock_common_setsockopt,
910 .compat_getsockopt = compat_sock_common_getsockopt,
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800911#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700912};
913
914/* Registration with AF_INET family. */
915static struct inet_protosw sctp_seqpacket_protosw = {
916 .type = SOCK_SEQPACKET,
917 .protocol = IPPROTO_SCTP,
918 .prot = &sctp_prot,
919 .ops = &inet_seqpacket_ops,
920 .capability = -1,
921 .no_check = 0,
922 .flags = SCTP_PROTOSW_FLAG
923};
924static struct inet_protosw sctp_stream_protosw = {
925 .type = SOCK_STREAM,
926 .protocol = IPPROTO_SCTP,
927 .prot = &sctp_prot,
928 .ops = &inet_seqpacket_ops,
929 .capability = -1,
930 .no_check = 0,
931 .flags = SCTP_PROTOSW_FLAG
932};
933
934/* Register with IP layer. */
935static struct net_protocol sctp_protocol = {
936 .handler = sctp_rcv,
937 .err_handler = sctp_v4_err,
938 .no_policy = 1,
939};
940
941/* IPv4 address related functions. */
Neil Horman15efbe72008-02-15 09:53:59 -0500942static struct sctp_af sctp_af_inet = {
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800943 .sa_family = AF_INET,
944 .sctp_xmit = sctp_v4_xmit,
945 .setsockopt = ip_setsockopt,
946 .getsockopt = ip_getsockopt,
947 .get_dst = sctp_v4_get_dst,
948 .get_saddr = sctp_v4_get_saddr,
949 .copy_addrlist = sctp_v4_copy_addrlist,
950 .from_skb = sctp_v4_from_skb,
951 .from_sk = sctp_v4_from_sk,
952 .to_sk_saddr = sctp_v4_to_sk_saddr,
953 .to_sk_daddr = sctp_v4_to_sk_daddr,
954 .from_addr_param = sctp_v4_from_addr_param,
955 .to_addr_param = sctp_v4_to_addr_param,
956 .dst_saddr = sctp_v4_dst_saddr,
957 .cmp_addr = sctp_v4_cmp_addr,
958 .addr_valid = sctp_v4_addr_valid,
959 .inaddr_any = sctp_v4_inaddr_any,
960 .is_any = sctp_v4_is_any,
961 .available = sctp_v4_available,
962 .scope = sctp_v4_scope,
963 .skb_iif = sctp_v4_skb_iif,
964 .is_ce = sctp_v4_is_ce,
965 .seq_dump_addr = sctp_v4_seq_dump_addr,
Vlad Yasevichb9031d92008-06-04 12:40:15 -0700966 .ecn_capable = sctp_v4_ecn_capable,
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800967 .net_header_len = sizeof(struct iphdr),
968 .sockaddr_len = sizeof(struct sockaddr_in),
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800969#ifdef CONFIG_COMPAT
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800970 .compat_setsockopt = compat_ip_setsockopt,
971 .compat_getsockopt = compat_ip_getsockopt,
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800972#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700973};
974
975struct sctp_pf *sctp_get_pf_specific(sa_family_t family) {
976
977 switch (family) {
978 case PF_INET:
979 return sctp_pf_inet_specific;
980 case PF_INET6:
981 return sctp_pf_inet6_specific;
982 default:
983 return NULL;
984 }
985}
986
987/* Register the PF specific function table. */
988int sctp_register_pf(struct sctp_pf *pf, sa_family_t family)
989{
990 switch (family) {
991 case PF_INET:
992 if (sctp_pf_inet_specific)
993 return 0;
994 sctp_pf_inet_specific = pf;
995 break;
996 case PF_INET6:
997 if (sctp_pf_inet6_specific)
998 return 0;
999 sctp_pf_inet6_specific = pf;
1000 break;
1001 default:
1002 return 0;
1003 }
1004 return 1;
1005}
1006
YOSHIFUJI Hideaki996b1db2008-04-10 03:50:13 -07001007static inline int init_sctp_mibs(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001008{
YOSHIFUJI Hideaki996b1db2008-04-10 03:50:13 -07001009 return snmp_mib_init((void**)sctp_statistics, sizeof(struct sctp_mib));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001010}
1011
YOSHIFUJI Hideaki996b1db2008-04-10 03:50:13 -07001012static inline void cleanup_sctp_mibs(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001013{
YOSHIFUJI Hideaki996b1db2008-04-10 03:50:13 -07001014 snmp_mib_free((void**)sctp_statistics);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001015}
1016
Vlad Yasevich270637a2008-03-20 15:17:14 -07001017static void sctp_v4_pf_init(void)
1018{
1019 /* Initialize the SCTP specific PF functions. */
1020 sctp_register_pf(&sctp_pf_inet, PF_INET);
1021 sctp_register_af(&sctp_af_inet);
1022}
1023
1024static void sctp_v4_pf_exit(void)
1025{
1026 list_del(&sctp_af_inet.list);
1027}
1028
1029static int sctp_v4_protosw_init(void)
1030{
1031 int rc;
1032
1033 rc = proto_register(&sctp_prot, 1);
1034 if (rc)
1035 return rc;
1036
1037 /* Register SCTP(UDP and TCP style) with socket layer. */
1038 inet_register_protosw(&sctp_seqpacket_protosw);
1039 inet_register_protosw(&sctp_stream_protosw);
1040
1041 return 0;
1042}
1043
1044static void sctp_v4_protosw_exit(void)
1045{
1046 inet_unregister_protosw(&sctp_stream_protosw);
1047 inet_unregister_protosw(&sctp_seqpacket_protosw);
1048 proto_unregister(&sctp_prot);
1049}
1050
1051static int sctp_v4_add_protocol(void)
1052{
1053 /* Register notifier for inet address additions/deletions. */
1054 register_inetaddr_notifier(&sctp_inetaddr_notifier);
1055
1056 /* Register SCTP with inet layer. */
1057 if (inet_add_protocol(&sctp_protocol, IPPROTO_SCTP) < 0)
1058 return -EAGAIN;
1059
1060 return 0;
1061}
1062
1063static void sctp_v4_del_protocol(void)
1064{
1065 inet_del_protocol(&sctp_protocol, IPPROTO_SCTP);
1066 unregister_inetaddr_notifier(&sctp_inetaddr_notifier);
1067}
1068
Linus Torvalds1da177e2005-04-16 15:20:36 -07001069/* Initialize the universe into something sensible. */
1070SCTP_STATIC __init int sctp_init(void)
1071{
1072 int i;
1073 int status = -EINVAL;
1074 unsigned long goal;
Neil Horman4d93df02007-08-15 16:07:44 -07001075 unsigned long limit;
1076 int max_share;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001077 int order;
1078
1079 /* SCTP_DEBUG sanity check. */
1080 if (!sctp_sanity_check())
1081 goto out;
1082
Sridhar Samudrala827bf122007-05-04 13:36:30 -07001083 /* Allocate bind_bucket and chunk caches. */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001084 status = -ENOBUFS;
1085 sctp_bucket_cachep = kmem_cache_create("sctp_bind_bucket",
1086 sizeof(struct sctp_bind_bucket),
1087 0, SLAB_HWCACHE_ALIGN,
Paul Mundt20c2df82007-07-20 10:11:58 +09001088 NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001089 if (!sctp_bucket_cachep)
Sridhar Samudrala827bf122007-05-04 13:36:30 -07001090 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001091
1092 sctp_chunk_cachep = kmem_cache_create("sctp_chunk",
1093 sizeof(struct sctp_chunk),
1094 0, SLAB_HWCACHE_ALIGN,
Paul Mundt20c2df82007-07-20 10:11:58 +09001095 NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001096 if (!sctp_chunk_cachep)
1097 goto err_chunk_cachep;
1098
1099 /* Allocate and initialise sctp mibs. */
1100 status = init_sctp_mibs();
1101 if (status)
1102 goto err_init_mibs;
1103
1104 /* Initialize proc fs directory. */
1105 status = sctp_proc_init();
1106 if (status)
1107 goto err_init_proc;
1108
1109 /* Initialize object count debugging. */
1110 sctp_dbg_objcnt_init();
1111
Linus Torvalds1da177e2005-04-16 15:20:36 -07001112 /*
1113 * 14. Suggested SCTP Protocol Parameter Values
1114 */
1115 /* The following protocol parameters are RECOMMENDED: */
1116 /* RTO.Initial - 3 seconds */
1117 sctp_rto_initial = SCTP_RTO_INITIAL;
1118 /* RTO.Min - 1 second */
1119 sctp_rto_min = SCTP_RTO_MIN;
1120 /* RTO.Max - 60 seconds */
1121 sctp_rto_max = SCTP_RTO_MAX;
1122 /* RTO.Alpha - 1/8 */
1123 sctp_rto_alpha = SCTP_RTO_ALPHA;
1124 /* RTO.Beta - 1/4 */
1125 sctp_rto_beta = SCTP_RTO_BETA;
1126
1127 /* Valid.Cookie.Life - 60 seconds */
Vladislav Yasevich3fd091e2006-08-22 13:29:17 -07001128 sctp_valid_cookie_life = SCTP_DEFAULT_COOKIE_LIFE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001129
1130 /* Whether Cookie Preservative is enabled(1) or not(0) */
1131 sctp_cookie_preserve_enable = 1;
1132
1133 /* Max.Burst - 4 */
Vlad Yasevich70331572007-03-23 11:34:36 -07001134 sctp_max_burst = SCTP_DEFAULT_MAX_BURST;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001135
1136 /* Association.Max.Retrans - 10 attempts
1137 * Path.Max.Retrans - 5 attempts (per destination address)
1138 * Max.Init.Retransmits - 8 attempts
1139 */
1140 sctp_max_retrans_association = 10;
1141 sctp_max_retrans_path = 5;
1142 sctp_max_retrans_init = 8;
1143
Neil Horman4eb701d2005-04-28 12:02:04 -07001144 /* Sendbuffer growth - do per-socket accounting */
1145 sctp_sndbuf_policy = 0;
1146
Neil Horman049b3ff2005-11-11 16:08:24 -08001147 /* Rcvbuffer growth - do per-socket accounting */
1148 sctp_rcvbuf_policy = 0;
1149
Linus Torvalds1da177e2005-04-16 15:20:36 -07001150 /* HB.interval - 30 seconds */
Vlad Yasevich2f85a422005-06-28 13:24:23 -07001151 sctp_hb_interval = SCTP_DEFAULT_TIMEOUT_HEARTBEAT;
1152
1153 /* delayed SACK timeout */
1154 sctp_sack_timeout = SCTP_DEFAULT_TIMEOUT_SACK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001155
1156 /* Implementation specific variables. */
1157
1158 /* Initialize default stream count setup information. */
1159 sctp_max_instreams = SCTP_DEFAULT_INSTREAMS;
1160 sctp_max_outstreams = SCTP_DEFAULT_OUTSTREAMS;
1161
1162 /* Initialize handle used for association ids. */
1163 idr_init(&sctp_assocs_id);
1164
Neil Horman4d93df02007-08-15 16:07:44 -07001165 /* Set the pressure threshold to be a fraction of global memory that
1166 * is up to 1/2 at 256 MB, decreasing toward zero with the amount of
1167 * memory, with a floor of 128 pages.
1168 * Note this initalizes the data in sctpv6_prot too
1169 * Unabashedly stolen from tcp_init
1170 */
1171 limit = min(num_physpages, 1UL<<(28-PAGE_SHIFT)) >> (20-PAGE_SHIFT);
1172 limit = (limit * (num_physpages >> (20-PAGE_SHIFT))) >> (PAGE_SHIFT-11);
1173 limit = max(limit, 128UL);
1174 sysctl_sctp_mem[0] = limit / 4 * 3;
1175 sysctl_sctp_mem[1] = limit;
1176 sysctl_sctp_mem[2] = sysctl_sctp_mem[0] * 2;
1177
1178 /* Set per-socket limits to no more than 1/128 the pressure threshold*/
1179 limit = (sysctl_sctp_mem[1]) << (PAGE_SHIFT - 7);
1180 max_share = min(4UL*1024*1024, limit);
1181
1182 sysctl_sctp_rmem[0] = PAGE_SIZE; /* give each asoc 1 page min */
1183 sysctl_sctp_rmem[1] = (1500 *(sizeof(struct sk_buff) + 1));
1184 sysctl_sctp_rmem[2] = max(sysctl_sctp_rmem[1], max_share);
1185
Hideo Aoki3ab224b2007-12-31 00:11:19 -08001186 sysctl_sctp_wmem[0] = SK_MEM_QUANTUM;
Neil Horman4d93df02007-08-15 16:07:44 -07001187 sysctl_sctp_wmem[1] = 16*1024;
1188 sysctl_sctp_wmem[2] = max(64*1024, max_share);
1189
Linus Torvalds1da177e2005-04-16 15:20:36 -07001190 /* Size and allocate the association hash table.
1191 * The methodology is similar to that of the tcp hash tables.
1192 */
1193 if (num_physpages >= (128 * 1024))
1194 goal = num_physpages >> (22 - PAGE_SHIFT);
1195 else
1196 goal = num_physpages >> (24 - PAGE_SHIFT);
1197
1198 for (order = 0; (1UL << order) < goal; order++)
1199 ;
1200
1201 do {
1202 sctp_assoc_hashsize = (1UL << order) * PAGE_SIZE /
1203 sizeof(struct sctp_hashbucket);
1204 if ((sctp_assoc_hashsize > (64 * 1024)) && order > 0)
1205 continue;
1206 sctp_assoc_hashtable = (struct sctp_hashbucket *)
1207 __get_free_pages(GFP_ATOMIC, order);
1208 } while (!sctp_assoc_hashtable && --order > 0);
1209 if (!sctp_assoc_hashtable) {
1210 printk(KERN_ERR "SCTP: Failed association hash alloc.\n");
1211 status = -ENOMEM;
1212 goto err_ahash_alloc;
1213 }
1214 for (i = 0; i < sctp_assoc_hashsize; i++) {
1215 rwlock_init(&sctp_assoc_hashtable[i].lock);
Vlad Yasevichd970dbf2007-11-09 11:43:40 -05001216 INIT_HLIST_HEAD(&sctp_assoc_hashtable[i].chain);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001217 }
1218
1219 /* Allocate and initialize the endpoint hash table. */
1220 sctp_ep_hashsize = 64;
1221 sctp_ep_hashtable = (struct sctp_hashbucket *)
1222 kmalloc(64 * sizeof(struct sctp_hashbucket), GFP_KERNEL);
1223 if (!sctp_ep_hashtable) {
1224 printk(KERN_ERR "SCTP: Failed endpoint_hash alloc.\n");
1225 status = -ENOMEM;
1226 goto err_ehash_alloc;
1227 }
1228 for (i = 0; i < sctp_ep_hashsize; i++) {
1229 rwlock_init(&sctp_ep_hashtable[i].lock);
Vlad Yasevichd970dbf2007-11-09 11:43:40 -05001230 INIT_HLIST_HEAD(&sctp_ep_hashtable[i].chain);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001231 }
1232
1233 /* Allocate and initialize the SCTP port hash table. */
1234 do {
1235 sctp_port_hashsize = (1UL << order) * PAGE_SIZE /
1236 sizeof(struct sctp_bind_hashbucket);
1237 if ((sctp_port_hashsize > (64 * 1024)) && order > 0)
1238 continue;
1239 sctp_port_hashtable = (struct sctp_bind_hashbucket *)
1240 __get_free_pages(GFP_ATOMIC, order);
1241 } while (!sctp_port_hashtable && --order > 0);
1242 if (!sctp_port_hashtable) {
1243 printk(KERN_ERR "SCTP: Failed bind hash alloc.");
1244 status = -ENOMEM;
1245 goto err_bhash_alloc;
1246 }
1247 for (i = 0; i < sctp_port_hashsize; i++) {
1248 spin_lock_init(&sctp_port_hashtable[i].lock);
Vlad Yasevichd970dbf2007-11-09 11:43:40 -05001249 INIT_HLIST_HEAD(&sctp_port_hashtable[i].chain);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001250 }
1251
Linus Torvalds1da177e2005-04-16 15:20:36 -07001252 printk(KERN_INFO "SCTP: Hash tables configured "
1253 "(established %d bind %d)\n",
1254 sctp_assoc_hashsize, sctp_port_hashsize);
1255
1256 /* Disable ADDIP by default. */
1257 sctp_addip_enable = 0;
Vlad Yasevich73d9c4f2007-10-24 17:24:26 -04001258 sctp_addip_noauth = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001259
1260 /* Enable PR-SCTP by default. */
1261 sctp_prsctp_enable = 1;
1262
Vlad Yasevicha29a5bd2007-09-16 19:31:35 -07001263 /* Disable AUTH by default. */
1264 sctp_auth_enable = 0;
1265
Linus Torvalds1da177e2005-04-16 15:20:36 -07001266 sctp_sysctl_register();
1267
1268 INIT_LIST_HEAD(&sctp_address_families);
Vlad Yasevich270637a2008-03-20 15:17:14 -07001269 sctp_v4_pf_init();
1270 sctp_v6_pf_init();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001271
Vlad Yasevich270637a2008-03-20 15:17:14 -07001272 /* Initialize the local address list. */
1273 INIT_LIST_HEAD(&sctp_local_addr_list);
1274 spin_lock_init(&sctp_local_addr_lock);
1275 sctp_get_local_addr_list();
1276
1277 status = sctp_v4_protosw_init();
1278
Sridhar Samudrala827bf122007-05-04 13:36:30 -07001279 if (status)
Vlad Yasevich270637a2008-03-20 15:17:14 -07001280 goto err_protosw_init;
Sridhar Samudrala827bf122007-05-04 13:36:30 -07001281
Vlad Yasevich270637a2008-03-20 15:17:14 -07001282 status = sctp_v6_protosw_init();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001283 if (status)
Vlad Yasevich270637a2008-03-20 15:17:14 -07001284 goto err_v6_protosw_init;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001285
1286 /* Initialize the control inode/socket for handling OOTB packets. */
1287 if ((status = sctp_ctl_sock_init())) {
1288 printk (KERN_ERR
1289 "SCTP: Failed to initialize the SCTP control sock.\n");
1290 goto err_ctl_sock_init;
1291 }
1292
Vlad Yasevich270637a2008-03-20 15:17:14 -07001293 status = sctp_v4_add_protocol();
1294 if (status)
Sridhar Samudrala827bf122007-05-04 13:36:30 -07001295 goto err_add_protocol;
Sridhar Samudrala827bf122007-05-04 13:36:30 -07001296
1297 /* Register SCTP with inet6 layer. */
1298 status = sctp_v6_add_protocol();
1299 if (status)
1300 goto err_v6_add_protocol;
1301
Linus Torvalds1da177e2005-04-16 15:20:36 -07001302 status = 0;
1303out:
1304 return status;
Sridhar Samudrala827bf122007-05-04 13:36:30 -07001305err_v6_add_protocol:
Vlad Yasevich270637a2008-03-20 15:17:14 -07001306 sctp_v6_del_protocol();
Sridhar Samudrala827bf122007-05-04 13:36:30 -07001307err_add_protocol:
Vlad Yasevich270637a2008-03-20 15:17:14 -07001308 sctp_v4_del_protocol();
Denis V. Lunev56772422008-04-03 14:28:30 -07001309 inet_ctl_sock_destroy(sctp_ctl_sock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001310err_ctl_sock_init:
Vlad Yasevich270637a2008-03-20 15:17:14 -07001311 sctp_v6_protosw_exit();
1312err_v6_protosw_init:
1313 sctp_v4_protosw_exit();
1314err_protosw_init:
1315 sctp_free_local_addr_list();
1316 sctp_v4_pf_exit();
1317 sctp_v6_pf_exit();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001318 sctp_sysctl_unregister();
Neil Horman15efbe72008-02-15 09:53:59 -05001319 list_del(&sctp_af_inet.list);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001320 free_pages((unsigned long)sctp_port_hashtable,
1321 get_order(sctp_port_hashsize *
1322 sizeof(struct sctp_bind_hashbucket)));
1323err_bhash_alloc:
1324 kfree(sctp_ep_hashtable);
1325err_ehash_alloc:
1326 free_pages((unsigned long)sctp_assoc_hashtable,
1327 get_order(sctp_assoc_hashsize *
1328 sizeof(struct sctp_hashbucket)));
1329err_ahash_alloc:
1330 sctp_dbg_objcnt_exit();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001331 sctp_proc_exit();
Sridhar Samudrala827bf122007-05-04 13:36:30 -07001332err_init_proc:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001333 cleanup_sctp_mibs();
1334err_init_mibs:
1335 kmem_cache_destroy(sctp_chunk_cachep);
1336err_chunk_cachep:
1337 kmem_cache_destroy(sctp_bucket_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001338 goto out;
1339}
1340
1341/* Exit handler for the SCTP protocol. */
1342SCTP_STATIC __exit void sctp_exit(void)
1343{
1344 /* BUG. This should probably do something useful like clean
1345 * up all the remaining associations and all that memory.
1346 */
1347
Sridhar Samudrala827bf122007-05-04 13:36:30 -07001348 /* Unregister with inet6/inet layers. */
1349 sctp_v6_del_protocol();
Vlad Yasevich270637a2008-03-20 15:17:14 -07001350 sctp_v4_del_protocol();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001351
1352 /* Free the control endpoint. */
Denis V. Lunev56772422008-04-03 14:28:30 -07001353 inet_ctl_sock_destroy(sctp_ctl_sock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001354
Vlad Yasevich270637a2008-03-20 15:17:14 -07001355 /* Free protosw registrations */
1356 sctp_v6_protosw_exit();
1357 sctp_v4_protosw_exit();
1358
1359 /* Free the local address list. */
1360 sctp_free_local_addr_list();
Sridhar Samudrala827bf122007-05-04 13:36:30 -07001361
1362 /* Unregister with socket layer. */
Vlad Yasevich270637a2008-03-20 15:17:14 -07001363 sctp_v6_pf_exit();
1364 sctp_v4_pf_exit();
Sridhar Samudrala827bf122007-05-04 13:36:30 -07001365
Linus Torvalds1da177e2005-04-16 15:20:36 -07001366 sctp_sysctl_unregister();
Neil Horman15efbe72008-02-15 09:53:59 -05001367 list_del(&sctp_af_inet.list);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001368
1369 free_pages((unsigned long)sctp_assoc_hashtable,
1370 get_order(sctp_assoc_hashsize *
1371 sizeof(struct sctp_hashbucket)));
1372 kfree(sctp_ep_hashtable);
1373 free_pages((unsigned long)sctp_port_hashtable,
1374 get_order(sctp_port_hashsize *
1375 sizeof(struct sctp_bind_hashbucket)));
1376
Linus Torvalds1da177e2005-04-16 15:20:36 -07001377 sctp_dbg_objcnt_exit();
1378 sctp_proc_exit();
1379 cleanup_sctp_mibs();
1380
Sridhar Samudrala827bf122007-05-04 13:36:30 -07001381 kmem_cache_destroy(sctp_chunk_cachep);
1382 kmem_cache_destroy(sctp_bucket_cachep);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001383}
1384
1385module_init(sctp_init);
1386module_exit(sctp_exit);
1387
Arnaldo Carvalho de Melobb97d312005-08-09 20:19:14 -07001388/*
1389 * __stringify doesn't likes enums, so use IPPROTO_SCTP value (132) directly.
1390 */
1391MODULE_ALIAS("net-pf-" __stringify(PF_INET) "-proto-132");
Sridhar Samudrala882a3822006-12-13 16:33:35 -08001392MODULE_ALIAS("net-pf-" __stringify(PF_INET6) "-proto-132");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001393MODULE_AUTHOR("Linux Kernel SCTP developers <lksctp-developers@lists.sourceforge.net>");
1394MODULE_DESCRIPTION("Support for the SCTP protocol (RFC2960)");
1395MODULE_LICENSE("GPL");