blob: c6297744a4ed2c6d026a957f4c30d22a12b345c5 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/* SCTP kernel reference Implementation
2 * (C) Copyright IBM Corp. 2001, 2004
3 * Copyright (c) 1999-2000 Cisco, Inc.
4 * Copyright (c) 1999-2001 Motorola, Inc.
5 * Copyright (c) 2001 Intel Corp.
6 * Copyright (c) 2001 Nokia, Inc.
7 * Copyright (c) 2001 La Monte H.P. Yarroll
8 *
9 * This file is part of the SCTP kernel reference Implementation
10 *
11 * Initialization/cleanup for SCTP protocol support.
12 *
13 * The SCTP reference implementation is free software;
14 * 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 *
19 * The SCTP reference implementation is distributed in the hope that it
20 * 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>
54#include <net/protocol.h>
55#include <net/ip.h>
56#include <net/ipv6.h>
Arnaldo Carvalho de Melo14c85022005-12-27 02:43:12 -020057#include <net/route.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070058#include <net/sctp/sctp.h>
59#include <net/addrconf.h>
60#include <net/inet_common.h>
61#include <net/inet_ecn.h>
62
63/* Global data structures. */
Brian Haley4cbf1ca2006-09-18 00:04:22 -070064struct sctp_globals sctp_globals __read_mostly;
Linus Torvalds1da177e2005-04-16 15:20:36 -070065struct proc_dir_entry *proc_net_sctp;
Eric Dumazetba899662005-08-26 12:05:31 -070066DEFINE_SNMP_STAT(struct sctp_mib, sctp_statistics) __read_mostly;
Linus Torvalds1da177e2005-04-16 15:20:36 -070067
68struct idr sctp_assocs_id;
69DEFINE_SPINLOCK(sctp_assocs_id_lock);
70
71/* This is the global socket data structure used for responding to
72 * the Out-of-the-blue (OOTB) packets. A control sock will be created
73 * for this socket at the initialization time.
74 */
75static struct socket *sctp_ctl_socket;
76
77static struct sctp_pf *sctp_pf_inet6_specific;
78static struct sctp_pf *sctp_pf_inet_specific;
79static struct sctp_af *sctp_af_v4_specific;
80static struct sctp_af *sctp_af_v6_specific;
81
Eric Dumazetba899662005-08-26 12:05:31 -070082kmem_cache_t *sctp_chunk_cachep __read_mostly;
83kmem_cache_t *sctp_bucket_cachep __read_mostly;
Linus Torvalds1da177e2005-04-16 15:20:36 -070084
Linus Torvalds1da177e2005-04-16 15:20:36 -070085/* Return the address of the control sock. */
86struct sock *sctp_get_ctl_sock(void)
87{
88 return sctp_ctl_socket->sk;
89}
90
91/* Set up the proc fs entry for the SCTP protocol. */
92static __init int sctp_proc_init(void)
93{
94 if (!proc_net_sctp) {
95 struct proc_dir_entry *ent;
96 ent = proc_mkdir("net/sctp", NULL);
97 if (ent) {
98 ent->owner = THIS_MODULE;
99 proc_net_sctp = ent;
100 } else
101 goto out_nomem;
102 }
103
104 if (sctp_snmp_proc_init())
105 goto out_nomem;
106 if (sctp_eps_proc_init())
107 goto out_nomem;
108 if (sctp_assocs_proc_init())
109 goto out_nomem;
110
111 return 0;
112
113out_nomem:
114 return -ENOMEM;
115}
116
117/* Clean up the proc fs entry for the SCTP protocol.
118 * Note: Do not make this __exit as it is used in the init error
119 * path.
120 */
121static void sctp_proc_exit(void)
122{
123 sctp_snmp_proc_exit();
124 sctp_eps_proc_exit();
125 sctp_assocs_proc_exit();
126
127 if (proc_net_sctp) {
128 proc_net_sctp = NULL;
129 remove_proc_entry("net/sctp", NULL);
130 }
131}
132
133/* Private helper to extract ipv4 address and stash them in
134 * the protocol structure.
135 */
136static void sctp_v4_copy_addrlist(struct list_head *addrlist,
137 struct net_device *dev)
138{
139 struct in_device *in_dev;
140 struct in_ifaddr *ifa;
141 struct sctp_sockaddr_entry *addr;
142
143 rcu_read_lock();
Herbert Xue5ed6392005-10-03 14:35:55 -0700144 if ((in_dev = __in_dev_get_rcu(dev)) == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145 rcu_read_unlock();
146 return;
147 }
148
149 for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) {
150 /* Add the address to the local list. */
151 addr = t_new(struct sctp_sockaddr_entry, GFP_ATOMIC);
152 if (addr) {
Al Viro2a6fd782006-11-20 17:04:42 -0800153 addr->a.v4.sin_family = AF_INET;
154 addr->a.v4.sin_port = 0;
155 addr->a.v4.sin_addr.s_addr = ifa->ifa_local;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156 list_add_tail(&addr->list, addrlist);
157 }
158 }
159
160 rcu_read_unlock();
161}
162
163/* Extract our IP addresses from the system and stash them in the
164 * protocol structure.
165 */
166static void __sctp_get_local_addr_list(void)
167{
168 struct net_device *dev;
169 struct list_head *pos;
170 struct sctp_af *af;
171
172 read_lock(&dev_base_lock);
173 for (dev = dev_base; dev; dev = dev->next) {
174 __list_for_each(pos, &sctp_address_families) {
175 af = list_entry(pos, struct sctp_af, list);
176 af->copy_addrlist(&sctp_local_addr_list, dev);
177 }
178 }
179 read_unlock(&dev_base_lock);
180}
181
182static void sctp_get_local_addr_list(void)
183{
184 unsigned long flags;
185
186 sctp_spin_lock_irqsave(&sctp_local_addr_lock, flags);
187 __sctp_get_local_addr_list();
188 sctp_spin_unlock_irqrestore(&sctp_local_addr_lock, flags);
189}
190
191/* Free the existing local addresses. */
192static void __sctp_free_local_addr_list(void)
193{
194 struct sctp_sockaddr_entry *addr;
195 struct list_head *pos, *temp;
196
197 list_for_each_safe(pos, temp, &sctp_local_addr_list) {
198 addr = list_entry(pos, struct sctp_sockaddr_entry, list);
199 list_del(pos);
200 kfree(addr);
201 }
202}
203
204/* Free the existing local addresses. */
205static void sctp_free_local_addr_list(void)
206{
207 unsigned long flags;
208
209 sctp_spin_lock_irqsave(&sctp_local_addr_lock, flags);
210 __sctp_free_local_addr_list();
211 sctp_spin_unlock_irqrestore(&sctp_local_addr_lock, flags);
212}
213
214/* Copy the local addresses which are valid for 'scope' into 'bp'. */
215int sctp_copy_local_addr_list(struct sctp_bind_addr *bp, sctp_scope_t scope,
Al Virodd0fc662005-10-07 07:46:04 +0100216 gfp_t gfp, int copy_flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217{
218 struct sctp_sockaddr_entry *addr;
219 int error = 0;
220 struct list_head *pos;
221 unsigned long flags;
222
223 sctp_spin_lock_irqsave(&sctp_local_addr_lock, flags);
224 list_for_each(pos, &sctp_local_addr_list) {
225 addr = list_entry(pos, struct sctp_sockaddr_entry, list);
Al Viro6244be42006-11-20 17:21:44 -0800226 if (sctp_in_scope(&addr->a, scope)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227 /* Now that the address is in scope, check to see if
228 * the address type is really supported by the local
229 * sock as well as the remote peer.
230 */
Al Viro6244be42006-11-20 17:21:44 -0800231 if ((((AF_INET == addr->a.sa.sa_family) &&
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232 (copy_flags & SCTP_ADDR4_PEERSUPP))) ||
Al Viro6244be42006-11-20 17:21:44 -0800233 (((AF_INET6 == addr->a.sa.sa_family) &&
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234 (copy_flags & SCTP_ADDR6_ALLOWED) &&
235 (copy_flags & SCTP_ADDR6_PEERSUPP)))) {
Al Viro5ab7b852006-11-20 17:10:38 -0800236 error = sctp_add_bind_addr(bp, &addr->a, 1,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237 GFP_ATOMIC);
238 if (error)
239 goto end_copy;
240 }
241 }
242 }
243
244end_copy:
245 sctp_spin_unlock_irqrestore(&sctp_local_addr_lock, flags);
246 return error;
247}
248
249/* Initialize a sctp_addr from in incoming skb. */
250static void sctp_v4_from_skb(union sctp_addr *addr, struct sk_buff *skb,
251 int is_saddr)
252{
253 void *from;
Al Virod55c41b2006-11-20 17:09:40 -0800254 __be16 *port;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255 struct sctphdr *sh;
256
257 port = &addr->v4.sin_port;
258 addr->v4.sin_family = AF_INET;
259
260 sh = (struct sctphdr *) skb->h.raw;
261 if (is_saddr) {
Al Virod55c41b2006-11-20 17:09:40 -0800262 *port = sh->source;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263 from = &skb->nh.iph->saddr;
264 } else {
Al Virod55c41b2006-11-20 17:09:40 -0800265 *port = sh->dest;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266 from = &skb->nh.iph->daddr;
267 }
268 memcpy(&addr->v4.sin_addr.s_addr, from, sizeof(struct in_addr));
269}
270
271/* Initialize an sctp_addr from a socket. */
272static void sctp_v4_from_sk(union sctp_addr *addr, struct sock *sk)
273{
274 addr->v4.sin_family = AF_INET;
Al Viro7dcdbd92006-11-20 17:24:21 -0800275 addr->v4.sin_port = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276 addr->v4.sin_addr.s_addr = inet_sk(sk)->rcv_saddr;
277}
278
279/* Initialize sk->sk_rcv_saddr from sctp_addr. */
280static void sctp_v4_to_sk_saddr(union sctp_addr *addr, struct sock *sk)
281{
282 inet_sk(sk)->rcv_saddr = addr->v4.sin_addr.s_addr;
283}
284
285/* Initialize sk->sk_daddr from sctp_addr. */
286static void sctp_v4_to_sk_daddr(union sctp_addr *addr, struct sock *sk)
287{
288 inet_sk(sk)->daddr = addr->v4.sin_addr.s_addr;
289}
290
291/* Initialize a sctp_addr from an address parameter. */
292static void sctp_v4_from_addr_param(union sctp_addr *addr,
293 union sctp_addr_param *param,
Al Virodd86d132006-11-20 17:11:13 -0800294 __be16 port, int iif)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295{
296 addr->v4.sin_family = AF_INET;
297 addr->v4.sin_port = port;
298 addr->v4.sin_addr.s_addr = param->v4.addr.s_addr;
299}
300
301/* Initialize an address parameter from a sctp_addr and return the length
302 * of the address parameter.
303 */
304static int sctp_v4_to_addr_param(const union sctp_addr *addr,
305 union sctp_addr_param *param)
306{
307 int length = sizeof(sctp_ipv4addr_param_t);
308
309 param->v4.param_hdr.type = SCTP_PARAM_IPV4_ADDRESS;
Al Virodbc16db2006-11-20 17:01:42 -0800310 param->v4.param_hdr.length = htons(length);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311 param->v4.addr.s_addr = addr->v4.sin_addr.s_addr;
312
313 return length;
314}
315
316/* Initialize a sctp_addr from a dst_entry. */
317static void sctp_v4_dst_saddr(union sctp_addr *saddr, struct dst_entry *dst,
Al Viro854d43a2006-11-20 17:06:24 -0800318 __be16 port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319{
320 struct rtable *rt = (struct rtable *)dst;
321 saddr->v4.sin_family = AF_INET;
322 saddr->v4.sin_port = port;
323 saddr->v4.sin_addr.s_addr = rt->rt_src;
324}
325
326/* Compare two addresses exactly. */
327static int sctp_v4_cmp_addr(const union sctp_addr *addr1,
328 const union sctp_addr *addr2)
329{
330 if (addr1->sa.sa_family != addr2->sa.sa_family)
331 return 0;
332 if (addr1->v4.sin_port != addr2->v4.sin_port)
333 return 0;
334 if (addr1->v4.sin_addr.s_addr != addr2->v4.sin_addr.s_addr)
335 return 0;
336
337 return 1;
338}
339
340/* Initialize addr struct to INADDR_ANY. */
341static void sctp_v4_inaddr_any(union sctp_addr *addr, unsigned short port)
342{
343 addr->v4.sin_family = AF_INET;
344 addr->v4.sin_addr.s_addr = INADDR_ANY;
345 addr->v4.sin_port = port;
346}
347
348/* Is this a wildcard address? */
349static int sctp_v4_is_any(const union sctp_addr *addr)
350{
351 return INADDR_ANY == addr->v4.sin_addr.s_addr;
352}
353
354/* This function checks if the address is a valid address to be used for
355 * SCTP binding.
356 *
357 * Output:
358 * Return 0 - If the address is a non-unicast or an illegal address.
359 * Return 1 - If the address is a unicast.
360 */
Vlad Yasevich5636bef2006-06-17 22:55:35 -0700361static int sctp_v4_addr_valid(union sctp_addr *addr,
362 struct sctp_sock *sp,
363 const struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364{
365 /* Is this a non-unicast address or a unusable SCTP address? */
366 if (IS_IPV4_UNUSABLE_ADDRESS(&addr->v4.sin_addr.s_addr))
367 return 0;
368
Vlad Yasevich5636bef2006-06-17 22:55:35 -0700369 /* Is this a broadcast address? */
370 if (skb && ((struct rtable *)skb->dst)->rt_flags & RTCF_BROADCAST)
371 return 0;
372
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373 return 1;
374}
375
376/* Should this be available for binding? */
377static int sctp_v4_available(union sctp_addr *addr, struct sctp_sock *sp)
378{
379 int ret = inet_addr_type(addr->v4.sin_addr.s_addr);
380
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381
Neil Hormancdac4e02005-06-13 15:12:33 -0700382 if (addr->v4.sin_addr.s_addr != INADDR_ANY &&
383 ret != RTN_LOCAL &&
384 !sp->inet.freebind &&
385 !sysctl_ip_nonlocal_bind)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386 return 0;
Neil Hormancdac4e02005-06-13 15:12:33 -0700387
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388 return 1;
389}
390
391/* Checking the loopback, private and other address scopes as defined in
392 * RFC 1918. The IPv4 scoping is based on the draft for SCTP IPv4
393 * scoping <draft-stewart-tsvwg-sctp-ipv4-00.txt>.
394 *
395 * Level 0 - unusable SCTP addresses
396 * Level 1 - loopback address
397 * Level 2 - link-local addresses
398 * Level 3 - private addresses.
399 * Level 4 - global addresses
400 * For INIT and INIT-ACK address list, let L be the level of
401 * of requested destination address, sender and receiver
402 * SHOULD include all of its addresses with level greater
403 * than or equal to L.
404 */
405static sctp_scope_t sctp_v4_scope(union sctp_addr *addr)
406{
407 sctp_scope_t retval;
408
409 /* Should IPv4 scoping be a sysctl configurable option
410 * so users can turn it off (default on) for certain
411 * unconventional networking environments?
412 */
413
414 /* Check for unusable SCTP addresses. */
415 if (IS_IPV4_UNUSABLE_ADDRESS(&addr->v4.sin_addr.s_addr)) {
416 retval = SCTP_SCOPE_UNUSABLE;
417 } else if (LOOPBACK(addr->v4.sin_addr.s_addr)) {
418 retval = SCTP_SCOPE_LOOPBACK;
419 } else if (IS_IPV4_LINK_ADDRESS(&addr->v4.sin_addr.s_addr)) {
420 retval = SCTP_SCOPE_LINK;
421 } else if (IS_IPV4_PRIVATE_ADDRESS(&addr->v4.sin_addr.s_addr)) {
422 retval = SCTP_SCOPE_PRIVATE;
423 } else {
424 retval = SCTP_SCOPE_GLOBAL;
425 }
426
427 return retval;
428}
429
430/* Returns a valid dst cache entry for the given source and destination ip
431 * addresses. If an association is passed, trys to get a dst entry with a
432 * source address that matches an address in the bind address list.
433 */
434static struct dst_entry *sctp_v4_get_dst(struct sctp_association *asoc,
435 union sctp_addr *daddr,
436 union sctp_addr *saddr)
437{
438 struct rtable *rt;
439 struct flowi fl;
440 struct sctp_bind_addr *bp;
441 rwlock_t *addr_lock;
442 struct sctp_sockaddr_entry *laddr;
443 struct list_head *pos;
444 struct dst_entry *dst = NULL;
445 union sctp_addr dst_saddr;
446
447 memset(&fl, 0x0, sizeof(struct flowi));
448 fl.fl4_dst = daddr->v4.sin_addr.s_addr;
449 fl.proto = IPPROTO_SCTP;
450 if (asoc) {
451 fl.fl4_tos = RT_CONN_FLAGS(asoc->base.sk);
452 fl.oif = asoc->base.sk->sk_bound_dev_if;
453 }
454 if (saddr)
455 fl.fl4_src = saddr->v4.sin_addr.s_addr;
456
457 SCTP_DEBUG_PRINTK("%s: DST:%u.%u.%u.%u, SRC:%u.%u.%u.%u - ",
458 __FUNCTION__, NIPQUAD(fl.fl4_dst),
459 NIPQUAD(fl.fl4_src));
460
461 if (!ip_route_output_key(&rt, &fl)) {
462 dst = &rt->u.dst;
463 }
464
465 /* If there is no association or if a source address is passed, no
466 * more validation is required.
467 */
468 if (!asoc || saddr)
469 goto out;
470
471 bp = &asoc->base.bind_addr;
472 addr_lock = &asoc->base.addr_lock;
473
474 if (dst) {
475 /* Walk through the bind address list and look for a bind
476 * address that matches the source address of the returned dst.
477 */
478 sctp_read_lock(addr_lock);
479 list_for_each(pos, &bp->address_list) {
480 laddr = list_entry(pos, struct sctp_sockaddr_entry,
481 list);
Sridhar Samudraladc022a92006-07-21 14:49:25 -0700482 if (!laddr->use_as_src)
483 continue;
Al Viro854d43a2006-11-20 17:06:24 -0800484 sctp_v4_dst_saddr(&dst_saddr, dst, htons(bp->port));
485 if (sctp_v4_cmp_addr(&dst_saddr, &laddr->a))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486 goto out_unlock;
487 }
488 sctp_read_unlock(addr_lock);
489
490 /* None of the bound addresses match the source address of the
491 * dst. So release it.
492 */
493 dst_release(dst);
494 dst = NULL;
495 }
496
497 /* Walk through the bind address list and try to get a dst that
498 * matches a bind address as the source address.
499 */
500 sctp_read_lock(addr_lock);
501 list_for_each(pos, &bp->address_list) {
502 laddr = list_entry(pos, struct sctp_sockaddr_entry, list);
503
Sridhar Samudraladc022a92006-07-21 14:49:25 -0700504 if ((laddr->use_as_src) &&
Al Viro6244be42006-11-20 17:21:44 -0800505 (AF_INET == laddr->a.sa.sa_family)) {
506 fl.fl4_src = laddr->a.v4.sin_addr.s_addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700507 if (!ip_route_output_key(&rt, &fl)) {
508 dst = &rt->u.dst;
509 goto out_unlock;
510 }
511 }
512 }
513
514out_unlock:
515 sctp_read_unlock(addr_lock);
516out:
517 if (dst)
518 SCTP_DEBUG_PRINTK("rt_dst:%u.%u.%u.%u, rt_src:%u.%u.%u.%u\n",
519 NIPQUAD(rt->rt_dst), NIPQUAD(rt->rt_src));
520 else
521 SCTP_DEBUG_PRINTK("NO ROUTE\n");
522
523 return dst;
524}
525
526/* For v4, the source address is cached in the route entry(dst). So no need
527 * to cache it separately and hence this is an empty routine.
528 */
529static void sctp_v4_get_saddr(struct sctp_association *asoc,
530 struct dst_entry *dst,
531 union sctp_addr *daddr,
532 union sctp_addr *saddr)
533{
534 struct rtable *rt = (struct rtable *)dst;
535
Vladislav Yasevich23ec47a2005-11-11 16:05:55 -0800536 if (!asoc)
537 return;
538
Linus Torvalds1da177e2005-04-16 15:20:36 -0700539 if (rt) {
540 saddr->v4.sin_family = AF_INET;
Al Virod3f7a542006-11-20 17:12:41 -0800541 saddr->v4.sin_port = htons(asoc->base.bind_addr.port);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542 saddr->v4.sin_addr.s_addr = rt->rt_src;
543 }
544}
545
546/* What interface did this skb arrive on? */
547static int sctp_v4_skb_iif(const struct sk_buff *skb)
548{
549 return ((struct rtable *)skb->dst)->rt_iif;
550}
551
552/* Was this packet marked by Explicit Congestion Notification? */
553static int sctp_v4_is_ce(const struct sk_buff *skb)
554{
555 return INET_ECN_is_ce(skb->nh.iph->tos);
556}
557
558/* Create and initialize a new sk for the socket returned by accept(). */
559static struct sock *sctp_v4_create_accept_sk(struct sock *sk,
560 struct sctp_association *asoc)
561{
562 struct inet_sock *inet = inet_sk(sk);
563 struct inet_sock *newinet;
564 struct sock *newsk = sk_alloc(PF_INET, GFP_KERNEL, sk->sk_prot, 1);
565
566 if (!newsk)
567 goto out;
568
569 sock_init_data(NULL, newsk);
570
571 newsk->sk_type = SOCK_STREAM;
572
573 newsk->sk_no_check = sk->sk_no_check;
574 newsk->sk_reuse = sk->sk_reuse;
575 newsk->sk_shutdown = sk->sk_shutdown;
576
577 newsk->sk_destruct = inet_sock_destruct;
578 newsk->sk_family = PF_INET;
579 newsk->sk_protocol = IPPROTO_SCTP;
580 newsk->sk_backlog_rcv = sk->sk_prot->backlog_rcv;
581 sock_reset_flag(newsk, SOCK_ZAPPED);
582
583 newinet = inet_sk(newsk);
584
585 /* Initialize sk's sport, dport, rcv_saddr and daddr for
586 * getsockname() and getpeername()
587 */
588 newinet->sport = inet->sport;
589 newinet->saddr = inet->saddr;
590 newinet->rcv_saddr = inet->rcv_saddr;
591 newinet->dport = htons(asoc->peer.port);
592 newinet->daddr = asoc->peer.primary_addr.v4.sin_addr.s_addr;
593 newinet->pmtudisc = inet->pmtudisc;
Vlad Yasevich4f444302006-10-30 18:54:32 -0800594 newinet->id = asoc->next_tsn ^ jiffies;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700595
596 newinet->uc_ttl = -1;
597 newinet->mc_loop = 1;
598 newinet->mc_ttl = 1;
599 newinet->mc_index = 0;
600 newinet->mc_list = NULL;
601
Arnaldo Carvalho de Meloe6848972005-08-09 19:45:38 -0700602 sk_refcnt_debug_inc(newsk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603
604 if (newsk->sk_prot->init(newsk)) {
605 sk_common_release(newsk);
606 newsk = NULL;
607 }
608
609out:
610 return newsk;
611}
612
613/* Map address, empty for v4 family */
614static void sctp_v4_addr_v4map(struct sctp_sock *sp, union sctp_addr *addr)
615{
616 /* Empty */
617}
618
619/* Dump the v4 addr to the seq file. */
620static void sctp_v4_seq_dump_addr(struct seq_file *seq, union sctp_addr *addr)
621{
622 seq_printf(seq, "%d.%d.%d.%d ", NIPQUAD(addr->v4.sin_addr));
623}
624
625/* Event handler for inet address addition/deletion events.
626 * Basically, whenever there is an event, we re-build our local address list.
627 */
628int sctp_inetaddr_event(struct notifier_block *this, unsigned long ev,
629 void *ptr)
630{
631 unsigned long flags;
632
633 sctp_spin_lock_irqsave(&sctp_local_addr_lock, flags);
634 __sctp_free_local_addr_list();
635 __sctp_get_local_addr_list();
636 sctp_spin_unlock_irqrestore(&sctp_local_addr_lock, flags);
637
638 return NOTIFY_DONE;
639}
640
641/*
642 * Initialize the control inode/socket with a control endpoint data
643 * structure. This endpoint is reserved exclusively for the OOTB processing.
644 */
645static int sctp_ctl_sock_init(void)
646{
647 int err;
648 sa_family_t family;
649
650 if (sctp_get_pf_specific(PF_INET6))
651 family = PF_INET6;
652 else
653 family = PF_INET;
654
655 err = sock_create_kern(family, SOCK_SEQPACKET, IPPROTO_SCTP,
656 &sctp_ctl_socket);
657 if (err < 0) {
658 printk(KERN_ERR
659 "SCTP: Failed to create the SCTP control socket.\n");
660 return err;
661 }
662 sctp_ctl_socket->sk->sk_allocation = GFP_ATOMIC;
663 inet_sk(sctp_ctl_socket->sk)->uc_ttl = -1;
664
665 return 0;
666}
667
668/* Register address family specific functions. */
669int sctp_register_af(struct sctp_af *af)
670{
671 switch (af->sa_family) {
672 case AF_INET:
673 if (sctp_af_v4_specific)
674 return 0;
675 sctp_af_v4_specific = af;
676 break;
677 case AF_INET6:
678 if (sctp_af_v6_specific)
679 return 0;
680 sctp_af_v6_specific = af;
681 break;
682 default:
683 return 0;
684 }
685
686 INIT_LIST_HEAD(&af->list);
687 list_add_tail(&af->list, &sctp_address_families);
688 return 1;
689}
690
691/* Get the table of functions for manipulating a particular address
692 * family.
693 */
694struct sctp_af *sctp_get_af_specific(sa_family_t family)
695{
696 switch (family) {
697 case AF_INET:
698 return sctp_af_v4_specific;
699 case AF_INET6:
700 return sctp_af_v6_specific;
701 default:
702 return NULL;
703 }
704}
705
706/* Common code to initialize a AF_INET msg_name. */
707static void sctp_inet_msgname(char *msgname, int *addr_len)
708{
709 struct sockaddr_in *sin;
710
711 sin = (struct sockaddr_in *)msgname;
712 *addr_len = sizeof(struct sockaddr_in);
713 sin->sin_family = AF_INET;
714 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
715}
716
717/* Copy the primary address of the peer primary address as the msg_name. */
718static void sctp_inet_event_msgname(struct sctp_ulpevent *event, char *msgname,
719 int *addr_len)
720{
721 struct sockaddr_in *sin, *sinfrom;
722
723 if (msgname) {
724 struct sctp_association *asoc;
725
726 asoc = event->asoc;
727 sctp_inet_msgname(msgname, addr_len);
728 sin = (struct sockaddr_in *)msgname;
729 sinfrom = &asoc->peer.primary_addr.v4;
730 sin->sin_port = htons(asoc->peer.port);
731 sin->sin_addr.s_addr = sinfrom->sin_addr.s_addr;
732 }
733}
734
735/* Initialize and copy out a msgname from an inbound skb. */
736static void sctp_inet_skb_msgname(struct sk_buff *skb, char *msgname, int *len)
737{
738 struct sctphdr *sh;
739 struct sockaddr_in *sin;
740
741 if (msgname) {
742 sctp_inet_msgname(msgname, len);
743 sin = (struct sockaddr_in *)msgname;
744 sh = (struct sctphdr *)skb->h.raw;
745 sin->sin_port = sh->source;
746 sin->sin_addr.s_addr = skb->nh.iph->saddr;
747 }
748}
749
750/* Do we support this AF? */
751static int sctp_inet_af_supported(sa_family_t family, struct sctp_sock *sp)
752{
753 /* PF_INET only supports AF_INET addresses. */
754 return (AF_INET == family);
755}
756
757/* Address matching with wildcards allowed. */
758static int sctp_inet_cmp_addr(const union sctp_addr *addr1,
759 const union sctp_addr *addr2,
760 struct sctp_sock *opt)
761{
762 /* PF_INET only supports AF_INET addresses. */
763 if (addr1->sa.sa_family != addr2->sa.sa_family)
764 return 0;
765 if (INADDR_ANY == addr1->v4.sin_addr.s_addr ||
766 INADDR_ANY == addr2->v4.sin_addr.s_addr)
767 return 1;
768 if (addr1->v4.sin_addr.s_addr == addr2->v4.sin_addr.s_addr)
769 return 1;
770
771 return 0;
772}
773
774/* Verify that provided sockaddr looks bindable. Common verification has
775 * already been taken care of.
776 */
777static int sctp_inet_bind_verify(struct sctp_sock *opt, union sctp_addr *addr)
778{
779 return sctp_v4_available(addr, opt);
780}
781
782/* Verify that sockaddr looks sendable. Common verification has already
783 * been taken care of.
784 */
785static int sctp_inet_send_verify(struct sctp_sock *opt, union sctp_addr *addr)
786{
787 return 1;
788}
789
790/* Fill in Supported Address Type information for INIT and INIT-ACK
791 * chunks. Returns number of addresses supported.
792 */
793static int sctp_inet_supported_addrs(const struct sctp_sock *opt,
794 __u16 *types)
795{
796 types[0] = SCTP_PARAM_IPV4_ADDRESS;
797 return 1;
798}
799
800/* Wrapper routine that calls the ip transmit routine. */
801static inline int sctp_v4_xmit(struct sk_buff *skb,
802 struct sctp_transport *transport, int ipfragok)
803{
804 SCTP_DEBUG_PRINTK("%s: skb:%p, len:%d, "
805 "src:%u.%u.%u.%u, dst:%u.%u.%u.%u\n",
806 __FUNCTION__, skb, skb->len,
807 NIPQUAD(((struct rtable *)skb->dst)->rt_src),
808 NIPQUAD(((struct rtable *)skb->dst)->rt_dst));
809
810 SCTP_INC_STATS(SCTP_MIB_OUTSCTPPACKS);
David S. Miller93173112006-11-09 19:58:25 -0800811 return ip_queue_xmit(skb, skb->sk, ipfragok);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700812}
813
814static struct sctp_af sctp_ipv4_specific;
815
816static struct sctp_pf sctp_pf_inet = {
817 .event_msgname = sctp_inet_event_msgname,
818 .skb_msgname = sctp_inet_skb_msgname,
819 .af_supported = sctp_inet_af_supported,
820 .cmp_addr = sctp_inet_cmp_addr,
821 .bind_verify = sctp_inet_bind_verify,
822 .send_verify = sctp_inet_send_verify,
823 .supported_addrs = sctp_inet_supported_addrs,
824 .create_accept_sk = sctp_v4_create_accept_sk,
825 .addr_v4map = sctp_v4_addr_v4map,
826 .af = &sctp_ipv4_specific,
827};
828
829/* Notifier for inetaddr addition/deletion events. */
830static struct notifier_block sctp_inetaddr_notifier = {
831 .notifier_call = sctp_inetaddr_event,
832};
833
834/* Socket operations. */
Eric Dumazet90ddc4f2005-12-22 12:49:22 -0800835static const struct proto_ops inet_seqpacket_ops = {
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800836 .family = PF_INET,
837 .owner = THIS_MODULE,
838 .release = inet_release, /* Needs to be wrapped... */
839 .bind = inet_bind,
840 .connect = inet_dgram_connect,
841 .socketpair = sock_no_socketpair,
842 .accept = inet_accept,
843 .getname = inet_getname, /* Semantics are different. */
844 .poll = sctp_poll,
845 .ioctl = inet_ioctl,
846 .listen = sctp_inet_listen,
847 .shutdown = inet_shutdown, /* Looks harmless. */
848 .setsockopt = sock_common_setsockopt, /* IP_SOL IP_OPTION is a problem */
849 .getsockopt = sock_common_getsockopt,
850 .sendmsg = inet_sendmsg,
851 .recvmsg = sock_common_recvmsg,
852 .mmap = sock_no_mmap,
853 .sendpage = sock_no_sendpage,
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800854#ifdef CONFIG_COMPAT
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800855 .compat_setsockopt = compat_sock_common_setsockopt,
856 .compat_getsockopt = compat_sock_common_getsockopt,
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800857#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700858};
859
860/* Registration with AF_INET family. */
861static struct inet_protosw sctp_seqpacket_protosw = {
862 .type = SOCK_SEQPACKET,
863 .protocol = IPPROTO_SCTP,
864 .prot = &sctp_prot,
865 .ops = &inet_seqpacket_ops,
866 .capability = -1,
867 .no_check = 0,
868 .flags = SCTP_PROTOSW_FLAG
869};
870static struct inet_protosw sctp_stream_protosw = {
871 .type = SOCK_STREAM,
872 .protocol = IPPROTO_SCTP,
873 .prot = &sctp_prot,
874 .ops = &inet_seqpacket_ops,
875 .capability = -1,
876 .no_check = 0,
877 .flags = SCTP_PROTOSW_FLAG
878};
879
880/* Register with IP layer. */
881static struct net_protocol sctp_protocol = {
882 .handler = sctp_rcv,
883 .err_handler = sctp_v4_err,
884 .no_policy = 1,
885};
886
887/* IPv4 address related functions. */
888static struct sctp_af sctp_ipv4_specific = {
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800889 .sa_family = AF_INET,
890 .sctp_xmit = sctp_v4_xmit,
891 .setsockopt = ip_setsockopt,
892 .getsockopt = ip_getsockopt,
893 .get_dst = sctp_v4_get_dst,
894 .get_saddr = sctp_v4_get_saddr,
895 .copy_addrlist = sctp_v4_copy_addrlist,
896 .from_skb = sctp_v4_from_skb,
897 .from_sk = sctp_v4_from_sk,
898 .to_sk_saddr = sctp_v4_to_sk_saddr,
899 .to_sk_daddr = sctp_v4_to_sk_daddr,
900 .from_addr_param = sctp_v4_from_addr_param,
901 .to_addr_param = sctp_v4_to_addr_param,
902 .dst_saddr = sctp_v4_dst_saddr,
903 .cmp_addr = sctp_v4_cmp_addr,
904 .addr_valid = sctp_v4_addr_valid,
905 .inaddr_any = sctp_v4_inaddr_any,
906 .is_any = sctp_v4_is_any,
907 .available = sctp_v4_available,
908 .scope = sctp_v4_scope,
909 .skb_iif = sctp_v4_skb_iif,
910 .is_ce = sctp_v4_is_ce,
911 .seq_dump_addr = sctp_v4_seq_dump_addr,
912 .net_header_len = sizeof(struct iphdr),
913 .sockaddr_len = sizeof(struct sockaddr_in),
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800914#ifdef CONFIG_COMPAT
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800915 .compat_setsockopt = compat_ip_setsockopt,
916 .compat_getsockopt = compat_ip_getsockopt,
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800917#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700918};
919
920struct sctp_pf *sctp_get_pf_specific(sa_family_t family) {
921
922 switch (family) {
923 case PF_INET:
924 return sctp_pf_inet_specific;
925 case PF_INET6:
926 return sctp_pf_inet6_specific;
927 default:
928 return NULL;
929 }
930}
931
932/* Register the PF specific function table. */
933int sctp_register_pf(struct sctp_pf *pf, sa_family_t family)
934{
935 switch (family) {
936 case PF_INET:
937 if (sctp_pf_inet_specific)
938 return 0;
939 sctp_pf_inet_specific = pf;
940 break;
941 case PF_INET6:
942 if (sctp_pf_inet6_specific)
943 return 0;
944 sctp_pf_inet6_specific = pf;
945 break;
946 default:
947 return 0;
948 }
949 return 1;
950}
951
952static int __init init_sctp_mibs(void)
953{
954 sctp_statistics[0] = alloc_percpu(struct sctp_mib);
955 if (!sctp_statistics[0])
956 return -ENOMEM;
957 sctp_statistics[1] = alloc_percpu(struct sctp_mib);
958 if (!sctp_statistics[1]) {
959 free_percpu(sctp_statistics[0]);
960 return -ENOMEM;
961 }
962 return 0;
963
964}
965
966static void cleanup_sctp_mibs(void)
967{
968 free_percpu(sctp_statistics[0]);
969 free_percpu(sctp_statistics[1]);
970}
971
972/* Initialize the universe into something sensible. */
973SCTP_STATIC __init int sctp_init(void)
974{
975 int i;
976 int status = -EINVAL;
977 unsigned long goal;
978 int order;
979
980 /* SCTP_DEBUG sanity check. */
981 if (!sctp_sanity_check())
982 goto out;
983
984 status = proto_register(&sctp_prot, 1);
985 if (status)
986 goto out;
987
988 /* Add SCTP to inet_protos hash table. */
989 status = -EAGAIN;
990 if (inet_add_protocol(&sctp_protocol, IPPROTO_SCTP) < 0)
991 goto err_add_protocol;
992
993 /* Add SCTP(TCP and UDP style) to inetsw linked list. */
994 inet_register_protosw(&sctp_seqpacket_protosw);
995 inet_register_protosw(&sctp_stream_protosw);
996
997 /* Allocate a cache pools. */
998 status = -ENOBUFS;
999 sctp_bucket_cachep = kmem_cache_create("sctp_bind_bucket",
1000 sizeof(struct sctp_bind_bucket),
1001 0, SLAB_HWCACHE_ALIGN,
1002 NULL, NULL);
1003
1004 if (!sctp_bucket_cachep)
1005 goto err_bucket_cachep;
1006
1007 sctp_chunk_cachep = kmem_cache_create("sctp_chunk",
1008 sizeof(struct sctp_chunk),
1009 0, SLAB_HWCACHE_ALIGN,
1010 NULL, NULL);
1011 if (!sctp_chunk_cachep)
1012 goto err_chunk_cachep;
1013
1014 /* Allocate and initialise sctp mibs. */
1015 status = init_sctp_mibs();
1016 if (status)
1017 goto err_init_mibs;
1018
1019 /* Initialize proc fs directory. */
1020 status = sctp_proc_init();
1021 if (status)
1022 goto err_init_proc;
1023
1024 /* Initialize object count debugging. */
1025 sctp_dbg_objcnt_init();
1026
1027 /* Initialize the SCTP specific PF functions. */
1028 sctp_register_pf(&sctp_pf_inet, PF_INET);
1029 /*
1030 * 14. Suggested SCTP Protocol Parameter Values
1031 */
1032 /* The following protocol parameters are RECOMMENDED: */
1033 /* RTO.Initial - 3 seconds */
1034 sctp_rto_initial = SCTP_RTO_INITIAL;
1035 /* RTO.Min - 1 second */
1036 sctp_rto_min = SCTP_RTO_MIN;
1037 /* RTO.Max - 60 seconds */
1038 sctp_rto_max = SCTP_RTO_MAX;
1039 /* RTO.Alpha - 1/8 */
1040 sctp_rto_alpha = SCTP_RTO_ALPHA;
1041 /* RTO.Beta - 1/4 */
1042 sctp_rto_beta = SCTP_RTO_BETA;
1043
1044 /* Valid.Cookie.Life - 60 seconds */
Vladislav Yasevich3fd091e2006-08-22 13:29:17 -07001045 sctp_valid_cookie_life = SCTP_DEFAULT_COOKIE_LIFE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001046
1047 /* Whether Cookie Preservative is enabled(1) or not(0) */
1048 sctp_cookie_preserve_enable = 1;
1049
1050 /* Max.Burst - 4 */
1051 sctp_max_burst = SCTP_MAX_BURST;
1052
1053 /* Association.Max.Retrans - 10 attempts
1054 * Path.Max.Retrans - 5 attempts (per destination address)
1055 * Max.Init.Retransmits - 8 attempts
1056 */
1057 sctp_max_retrans_association = 10;
1058 sctp_max_retrans_path = 5;
1059 sctp_max_retrans_init = 8;
1060
Neil Horman4eb701d2005-04-28 12:02:04 -07001061 /* Sendbuffer growth - do per-socket accounting */
1062 sctp_sndbuf_policy = 0;
1063
Neil Horman049b3ff2005-11-11 16:08:24 -08001064 /* Rcvbuffer growth - do per-socket accounting */
1065 sctp_rcvbuf_policy = 0;
1066
Linus Torvalds1da177e2005-04-16 15:20:36 -07001067 /* HB.interval - 30 seconds */
Vlad Yasevich2f85a422005-06-28 13:24:23 -07001068 sctp_hb_interval = SCTP_DEFAULT_TIMEOUT_HEARTBEAT;
1069
1070 /* delayed SACK timeout */
1071 sctp_sack_timeout = SCTP_DEFAULT_TIMEOUT_SACK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001072
1073 /* Implementation specific variables. */
1074
1075 /* Initialize default stream count setup information. */
1076 sctp_max_instreams = SCTP_DEFAULT_INSTREAMS;
1077 sctp_max_outstreams = SCTP_DEFAULT_OUTSTREAMS;
1078
1079 /* Initialize handle used for association ids. */
1080 idr_init(&sctp_assocs_id);
1081
1082 /* Size and allocate the association hash table.
1083 * The methodology is similar to that of the tcp hash tables.
1084 */
1085 if (num_physpages >= (128 * 1024))
1086 goal = num_physpages >> (22 - PAGE_SHIFT);
1087 else
1088 goal = num_physpages >> (24 - PAGE_SHIFT);
1089
1090 for (order = 0; (1UL << order) < goal; order++)
1091 ;
1092
1093 do {
1094 sctp_assoc_hashsize = (1UL << order) * PAGE_SIZE /
1095 sizeof(struct sctp_hashbucket);
1096 if ((sctp_assoc_hashsize > (64 * 1024)) && order > 0)
1097 continue;
1098 sctp_assoc_hashtable = (struct sctp_hashbucket *)
1099 __get_free_pages(GFP_ATOMIC, order);
1100 } while (!sctp_assoc_hashtable && --order > 0);
1101 if (!sctp_assoc_hashtable) {
1102 printk(KERN_ERR "SCTP: Failed association hash alloc.\n");
1103 status = -ENOMEM;
1104 goto err_ahash_alloc;
1105 }
1106 for (i = 0; i < sctp_assoc_hashsize; i++) {
1107 rwlock_init(&sctp_assoc_hashtable[i].lock);
1108 sctp_assoc_hashtable[i].chain = NULL;
1109 }
1110
1111 /* Allocate and initialize the endpoint hash table. */
1112 sctp_ep_hashsize = 64;
1113 sctp_ep_hashtable = (struct sctp_hashbucket *)
1114 kmalloc(64 * sizeof(struct sctp_hashbucket), GFP_KERNEL);
1115 if (!sctp_ep_hashtable) {
1116 printk(KERN_ERR "SCTP: Failed endpoint_hash alloc.\n");
1117 status = -ENOMEM;
1118 goto err_ehash_alloc;
1119 }
1120 for (i = 0; i < sctp_ep_hashsize; i++) {
1121 rwlock_init(&sctp_ep_hashtable[i].lock);
1122 sctp_ep_hashtable[i].chain = NULL;
1123 }
1124
1125 /* Allocate and initialize the SCTP port hash table. */
1126 do {
1127 sctp_port_hashsize = (1UL << order) * PAGE_SIZE /
1128 sizeof(struct sctp_bind_hashbucket);
1129 if ((sctp_port_hashsize > (64 * 1024)) && order > 0)
1130 continue;
1131 sctp_port_hashtable = (struct sctp_bind_hashbucket *)
1132 __get_free_pages(GFP_ATOMIC, order);
1133 } while (!sctp_port_hashtable && --order > 0);
1134 if (!sctp_port_hashtable) {
1135 printk(KERN_ERR "SCTP: Failed bind hash alloc.");
1136 status = -ENOMEM;
1137 goto err_bhash_alloc;
1138 }
1139 for (i = 0; i < sctp_port_hashsize; i++) {
1140 spin_lock_init(&sctp_port_hashtable[i].lock);
1141 sctp_port_hashtable[i].chain = NULL;
1142 }
1143
1144 spin_lock_init(&sctp_port_alloc_lock);
1145 sctp_port_rover = sysctl_local_port_range[0] - 1;
1146
1147 printk(KERN_INFO "SCTP: Hash tables configured "
1148 "(established %d bind %d)\n",
1149 sctp_assoc_hashsize, sctp_port_hashsize);
1150
1151 /* Disable ADDIP by default. */
1152 sctp_addip_enable = 0;
1153
1154 /* Enable PR-SCTP by default. */
1155 sctp_prsctp_enable = 1;
1156
1157 sctp_sysctl_register();
1158
1159 INIT_LIST_HEAD(&sctp_address_families);
1160 sctp_register_af(&sctp_ipv4_specific);
1161
1162 status = sctp_v6_init();
1163 if (status)
1164 goto err_v6_init;
1165
1166 /* Initialize the control inode/socket for handling OOTB packets. */
1167 if ((status = sctp_ctl_sock_init())) {
1168 printk (KERN_ERR
1169 "SCTP: Failed to initialize the SCTP control sock.\n");
1170 goto err_ctl_sock_init;
1171 }
1172
1173 /* Initialize the local address list. */
1174 INIT_LIST_HEAD(&sctp_local_addr_list);
1175 spin_lock_init(&sctp_local_addr_lock);
1176
1177 /* Register notifier for inet address additions/deletions. */
1178 register_inetaddr_notifier(&sctp_inetaddr_notifier);
1179
1180 sctp_get_local_addr_list();
1181
1182 __unsafe(THIS_MODULE);
1183 status = 0;
1184out:
1185 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001186err_ctl_sock_init:
1187 sctp_v6_exit();
1188err_v6_init:
1189 sctp_sysctl_unregister();
1190 list_del(&sctp_ipv4_specific.list);
1191 free_pages((unsigned long)sctp_port_hashtable,
1192 get_order(sctp_port_hashsize *
1193 sizeof(struct sctp_bind_hashbucket)));
1194err_bhash_alloc:
1195 kfree(sctp_ep_hashtable);
1196err_ehash_alloc:
1197 free_pages((unsigned long)sctp_assoc_hashtable,
1198 get_order(sctp_assoc_hashsize *
1199 sizeof(struct sctp_hashbucket)));
1200err_ahash_alloc:
1201 sctp_dbg_objcnt_exit();
1202err_init_proc:
1203 sctp_proc_exit();
1204 cleanup_sctp_mibs();
1205err_init_mibs:
1206 kmem_cache_destroy(sctp_chunk_cachep);
1207err_chunk_cachep:
1208 kmem_cache_destroy(sctp_bucket_cachep);
1209err_bucket_cachep:
1210 inet_del_protocol(&sctp_protocol, IPPROTO_SCTP);
1211 inet_unregister_protosw(&sctp_seqpacket_protosw);
1212 inet_unregister_protosw(&sctp_stream_protosw);
Neil Horman5e6bc342005-04-28 11:59:49 -07001213err_add_protocol:
1214 proto_unregister(&sctp_prot);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001215 goto out;
1216}
1217
1218/* Exit handler for the SCTP protocol. */
1219SCTP_STATIC __exit void sctp_exit(void)
1220{
1221 /* BUG. This should probably do something useful like clean
1222 * up all the remaining associations and all that memory.
1223 */
1224
1225 /* Unregister notifier for inet address additions/deletions. */
1226 unregister_inetaddr_notifier(&sctp_inetaddr_notifier);
1227
1228 /* Free the local address list. */
1229 sctp_free_local_addr_list();
1230
1231 /* Free the control endpoint. */
1232 sock_release(sctp_ctl_socket);
1233
1234 sctp_v6_exit();
1235 sctp_sysctl_unregister();
1236 list_del(&sctp_ipv4_specific.list);
1237
1238 free_pages((unsigned long)sctp_assoc_hashtable,
1239 get_order(sctp_assoc_hashsize *
1240 sizeof(struct sctp_hashbucket)));
1241 kfree(sctp_ep_hashtable);
1242 free_pages((unsigned long)sctp_port_hashtable,
1243 get_order(sctp_port_hashsize *
1244 sizeof(struct sctp_bind_hashbucket)));
1245
1246 kmem_cache_destroy(sctp_chunk_cachep);
1247 kmem_cache_destroy(sctp_bucket_cachep);
1248
1249 sctp_dbg_objcnt_exit();
1250 sctp_proc_exit();
1251 cleanup_sctp_mibs();
1252
1253 inet_del_protocol(&sctp_protocol, IPPROTO_SCTP);
1254 inet_unregister_protosw(&sctp_seqpacket_protosw);
1255 inet_unregister_protosw(&sctp_stream_protosw);
1256 proto_unregister(&sctp_prot);
1257}
1258
1259module_init(sctp_init);
1260module_exit(sctp_exit);
1261
Arnaldo Carvalho de Melobb97d312005-08-09 20:19:14 -07001262/*
1263 * __stringify doesn't likes enums, so use IPPROTO_SCTP value (132) directly.
1264 */
1265MODULE_ALIAS("net-pf-" __stringify(PF_INET) "-proto-132");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001266MODULE_AUTHOR("Linux Kernel SCTP developers <lksctp-developers@lists.sourceforge.net>");
1267MODULE_DESCRIPTION("Support for the SCTP protocol (RFC2960)");
1268MODULE_LICENSE("GPL");