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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;
156 addr->a_h = addr->a;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157 list_add_tail(&addr->list, addrlist);
158 }
159 }
160
161 rcu_read_unlock();
162}
163
164/* Extract our IP addresses from the system and stash them in the
165 * protocol structure.
166 */
167static void __sctp_get_local_addr_list(void)
168{
169 struct net_device *dev;
170 struct list_head *pos;
171 struct sctp_af *af;
172
173 read_lock(&dev_base_lock);
174 for (dev = dev_base; dev; dev = dev->next) {
175 __list_for_each(pos, &sctp_address_families) {
176 af = list_entry(pos, struct sctp_af, list);
177 af->copy_addrlist(&sctp_local_addr_list, dev);
178 }
179 }
180 read_unlock(&dev_base_lock);
181}
182
183static void sctp_get_local_addr_list(void)
184{
185 unsigned long flags;
186
187 sctp_spin_lock_irqsave(&sctp_local_addr_lock, flags);
188 __sctp_get_local_addr_list();
189 sctp_spin_unlock_irqrestore(&sctp_local_addr_lock, flags);
190}
191
192/* Free the existing local addresses. */
193static void __sctp_free_local_addr_list(void)
194{
195 struct sctp_sockaddr_entry *addr;
196 struct list_head *pos, *temp;
197
198 list_for_each_safe(pos, temp, &sctp_local_addr_list) {
199 addr = list_entry(pos, struct sctp_sockaddr_entry, list);
200 list_del(pos);
201 kfree(addr);
202 }
203}
204
205/* Free the existing local addresses. */
206static void sctp_free_local_addr_list(void)
207{
208 unsigned long flags;
209
210 sctp_spin_lock_irqsave(&sctp_local_addr_lock, flags);
211 __sctp_free_local_addr_list();
212 sctp_spin_unlock_irqrestore(&sctp_local_addr_lock, flags);
213}
214
215/* Copy the local addresses which are valid for 'scope' into 'bp'. */
216int sctp_copy_local_addr_list(struct sctp_bind_addr *bp, sctp_scope_t scope,
Al Virodd0fc662005-10-07 07:46:04 +0100217 gfp_t gfp, int copy_flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218{
219 struct sctp_sockaddr_entry *addr;
220 int error = 0;
221 struct list_head *pos;
222 unsigned long flags;
223
224 sctp_spin_lock_irqsave(&sctp_local_addr_lock, flags);
225 list_for_each(pos, &sctp_local_addr_list) {
226 addr = list_entry(pos, struct sctp_sockaddr_entry, list);
Al Viro09ef7fe2006-11-20 17:04:10 -0800227 if (sctp_in_scope(&addr->a_h, scope)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228 /* Now that the address is in scope, check to see if
229 * the address type is really supported by the local
230 * sock as well as the remote peer.
231 */
Al Viro09ef7fe2006-11-20 17:04:10 -0800232 if ((((AF_INET == addr->a_h.sa.sa_family) &&
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233 (copy_flags & SCTP_ADDR4_PEERSUPP))) ||
Al Viro09ef7fe2006-11-20 17:04:10 -0800234 (((AF_INET6 == addr->a_h.sa.sa_family) &&
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235 (copy_flags & SCTP_ADDR6_ALLOWED) &&
236 (copy_flags & SCTP_ADDR6_PEERSUPP)))) {
Al Viro5ab7b852006-11-20 17:10:38 -0800237 error = sctp_add_bind_addr(bp, &addr->a, 1,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238 GFP_ATOMIC);
239 if (error)
240 goto end_copy;
241 }
242 }
243 }
244
245end_copy:
246 sctp_spin_unlock_irqrestore(&sctp_local_addr_lock, flags);
247 return error;
248}
249
250/* Initialize a sctp_addr from in incoming skb. */
251static void sctp_v4_from_skb(union sctp_addr *addr, struct sk_buff *skb,
252 int is_saddr)
253{
254 void *from;
Al Virod55c41b2006-11-20 17:09:40 -0800255 __be16 *port;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256 struct sctphdr *sh;
257
258 port = &addr->v4.sin_port;
259 addr->v4.sin_family = AF_INET;
260
261 sh = (struct sctphdr *) skb->h.raw;
262 if (is_saddr) {
Al Virod55c41b2006-11-20 17:09:40 -0800263 *port = sh->source;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264 from = &skb->nh.iph->saddr;
265 } else {
Al Virod55c41b2006-11-20 17:09:40 -0800266 *port = sh->dest;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267 from = &skb->nh.iph->daddr;
268 }
269 memcpy(&addr->v4.sin_addr.s_addr, from, sizeof(struct in_addr));
270}
271
272/* Initialize an sctp_addr from a socket. */
273static void sctp_v4_from_sk(union sctp_addr *addr, struct sock *sk)
274{
275 addr->v4.sin_family = AF_INET;
276 addr->v4.sin_port = inet_sk(sk)->num;
277 addr->v4.sin_addr.s_addr = inet_sk(sk)->rcv_saddr;
278}
279
280/* Initialize sk->sk_rcv_saddr from sctp_addr. */
281static void sctp_v4_to_sk_saddr(union sctp_addr *addr, struct sock *sk)
282{
283 inet_sk(sk)->rcv_saddr = addr->v4.sin_addr.s_addr;
284}
285
286/* Initialize sk->sk_daddr from sctp_addr. */
287static void sctp_v4_to_sk_daddr(union sctp_addr *addr, struct sock *sk)
288{
289 inet_sk(sk)->daddr = addr->v4.sin_addr.s_addr;
290}
291
292/* Initialize a sctp_addr from an address parameter. */
293static void sctp_v4_from_addr_param(union sctp_addr *addr,
294 union sctp_addr_param *param,
295 __u16 port, int iif)
296{
297 addr->v4.sin_family = AF_INET;
298 addr->v4.sin_port = port;
299 addr->v4.sin_addr.s_addr = param->v4.addr.s_addr;
300}
301
302/* Initialize an address parameter from a sctp_addr and return the length
303 * of the address parameter.
304 */
305static int sctp_v4_to_addr_param(const union sctp_addr *addr,
306 union sctp_addr_param *param)
307{
308 int length = sizeof(sctp_ipv4addr_param_t);
309
310 param->v4.param_hdr.type = SCTP_PARAM_IPV4_ADDRESS;
Al Virodbc16db2006-11-20 17:01:42 -0800311 param->v4.param_hdr.length = htons(length);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312 param->v4.addr.s_addr = addr->v4.sin_addr.s_addr;
313
314 return length;
315}
316
317/* Initialize a sctp_addr from a dst_entry. */
318static void sctp_v4_dst_saddr(union sctp_addr *saddr, struct dst_entry *dst,
Al Viro854d43a2006-11-20 17:06:24 -0800319 __be16 port)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320{
321 struct rtable *rt = (struct rtable *)dst;
322 saddr->v4.sin_family = AF_INET;
323 saddr->v4.sin_port = port;
324 saddr->v4.sin_addr.s_addr = rt->rt_src;
325}
326
327/* Compare two addresses exactly. */
328static int sctp_v4_cmp_addr(const union sctp_addr *addr1,
329 const union sctp_addr *addr2)
330{
331 if (addr1->sa.sa_family != addr2->sa.sa_family)
332 return 0;
333 if (addr1->v4.sin_port != addr2->v4.sin_port)
334 return 0;
335 if (addr1->v4.sin_addr.s_addr != addr2->v4.sin_addr.s_addr)
336 return 0;
337
338 return 1;
339}
340
341/* Initialize addr struct to INADDR_ANY. */
342static void sctp_v4_inaddr_any(union sctp_addr *addr, unsigned short port)
343{
344 addr->v4.sin_family = AF_INET;
345 addr->v4.sin_addr.s_addr = INADDR_ANY;
346 addr->v4.sin_port = port;
347}
348
349/* Is this a wildcard address? */
350static int sctp_v4_is_any(const union sctp_addr *addr)
351{
352 return INADDR_ANY == addr->v4.sin_addr.s_addr;
353}
354
355/* This function checks if the address is a valid address to be used for
356 * SCTP binding.
357 *
358 * Output:
359 * Return 0 - If the address is a non-unicast or an illegal address.
360 * Return 1 - If the address is a unicast.
361 */
Vlad Yasevich5636bef2006-06-17 22:55:35 -0700362static int sctp_v4_addr_valid(union sctp_addr *addr,
363 struct sctp_sock *sp,
364 const struct sk_buff *skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365{
366 /* Is this a non-unicast address or a unusable SCTP address? */
367 if (IS_IPV4_UNUSABLE_ADDRESS(&addr->v4.sin_addr.s_addr))
368 return 0;
369
Vlad Yasevich5636bef2006-06-17 22:55:35 -0700370 /* Is this a broadcast address? */
371 if (skb && ((struct rtable *)skb->dst)->rt_flags & RTCF_BROADCAST)
372 return 0;
373
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374 return 1;
375}
376
377/* Should this be available for binding? */
378static int sctp_v4_available(union sctp_addr *addr, struct sctp_sock *sp)
379{
380 int ret = inet_addr_type(addr->v4.sin_addr.s_addr);
381
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382
Neil Hormancdac4e02005-06-13 15:12:33 -0700383 if (addr->v4.sin_addr.s_addr != INADDR_ANY &&
384 ret != RTN_LOCAL &&
385 !sp->inet.freebind &&
386 !sysctl_ip_nonlocal_bind)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387 return 0;
Neil Hormancdac4e02005-06-13 15:12:33 -0700388
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389 return 1;
390}
391
392/* Checking the loopback, private and other address scopes as defined in
393 * RFC 1918. The IPv4 scoping is based on the draft for SCTP IPv4
394 * scoping <draft-stewart-tsvwg-sctp-ipv4-00.txt>.
395 *
396 * Level 0 - unusable SCTP addresses
397 * Level 1 - loopback address
398 * Level 2 - link-local addresses
399 * Level 3 - private addresses.
400 * Level 4 - global addresses
401 * For INIT and INIT-ACK address list, let L be the level of
402 * of requested destination address, sender and receiver
403 * SHOULD include all of its addresses with level greater
404 * than or equal to L.
405 */
406static sctp_scope_t sctp_v4_scope(union sctp_addr *addr)
407{
408 sctp_scope_t retval;
409
410 /* Should IPv4 scoping be a sysctl configurable option
411 * so users can turn it off (default on) for certain
412 * unconventional networking environments?
413 */
414
415 /* Check for unusable SCTP addresses. */
416 if (IS_IPV4_UNUSABLE_ADDRESS(&addr->v4.sin_addr.s_addr)) {
417 retval = SCTP_SCOPE_UNUSABLE;
418 } else if (LOOPBACK(addr->v4.sin_addr.s_addr)) {
419 retval = SCTP_SCOPE_LOOPBACK;
420 } else if (IS_IPV4_LINK_ADDRESS(&addr->v4.sin_addr.s_addr)) {
421 retval = SCTP_SCOPE_LINK;
422 } else if (IS_IPV4_PRIVATE_ADDRESS(&addr->v4.sin_addr.s_addr)) {
423 retval = SCTP_SCOPE_PRIVATE;
424 } else {
425 retval = SCTP_SCOPE_GLOBAL;
426 }
427
428 return retval;
429}
430
431/* Returns a valid dst cache entry for the given source and destination ip
432 * addresses. If an association is passed, trys to get a dst entry with a
433 * source address that matches an address in the bind address list.
434 */
435static struct dst_entry *sctp_v4_get_dst(struct sctp_association *asoc,
436 union sctp_addr *daddr,
437 union sctp_addr *saddr)
438{
439 struct rtable *rt;
440 struct flowi fl;
441 struct sctp_bind_addr *bp;
442 rwlock_t *addr_lock;
443 struct sctp_sockaddr_entry *laddr;
444 struct list_head *pos;
445 struct dst_entry *dst = NULL;
446 union sctp_addr dst_saddr;
447
448 memset(&fl, 0x0, sizeof(struct flowi));
449 fl.fl4_dst = daddr->v4.sin_addr.s_addr;
450 fl.proto = IPPROTO_SCTP;
451 if (asoc) {
452 fl.fl4_tos = RT_CONN_FLAGS(asoc->base.sk);
453 fl.oif = asoc->base.sk->sk_bound_dev_if;
454 }
455 if (saddr)
456 fl.fl4_src = saddr->v4.sin_addr.s_addr;
457
458 SCTP_DEBUG_PRINTK("%s: DST:%u.%u.%u.%u, SRC:%u.%u.%u.%u - ",
459 __FUNCTION__, NIPQUAD(fl.fl4_dst),
460 NIPQUAD(fl.fl4_src));
461
462 if (!ip_route_output_key(&rt, &fl)) {
463 dst = &rt->u.dst;
464 }
465
466 /* If there is no association or if a source address is passed, no
467 * more validation is required.
468 */
469 if (!asoc || saddr)
470 goto out;
471
472 bp = &asoc->base.bind_addr;
473 addr_lock = &asoc->base.addr_lock;
474
475 if (dst) {
476 /* Walk through the bind address list and look for a bind
477 * address that matches the source address of the returned dst.
478 */
479 sctp_read_lock(addr_lock);
480 list_for_each(pos, &bp->address_list) {
481 laddr = list_entry(pos, struct sctp_sockaddr_entry,
482 list);
Sridhar Samudraladc022a92006-07-21 14:49:25 -0700483 if (!laddr->use_as_src)
484 continue;
Al Viro854d43a2006-11-20 17:06:24 -0800485 sctp_v4_dst_saddr(&dst_saddr, dst, htons(bp->port));
486 if (sctp_v4_cmp_addr(&dst_saddr, &laddr->a))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700487 goto out_unlock;
488 }
489 sctp_read_unlock(addr_lock);
490
491 /* None of the bound addresses match the source address of the
492 * dst. So release it.
493 */
494 dst_release(dst);
495 dst = NULL;
496 }
497
498 /* Walk through the bind address list and try to get a dst that
499 * matches a bind address as the source address.
500 */
501 sctp_read_lock(addr_lock);
502 list_for_each(pos, &bp->address_list) {
503 laddr = list_entry(pos, struct sctp_sockaddr_entry, list);
504
Sridhar Samudraladc022a92006-07-21 14:49:25 -0700505 if ((laddr->use_as_src) &&
Al Viro09ef7fe2006-11-20 17:04:10 -0800506 (AF_INET == laddr->a_h.sa.sa_family)) {
507 fl.fl4_src = laddr->a_h.v4.sin_addr.s_addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700508 if (!ip_route_output_key(&rt, &fl)) {
509 dst = &rt->u.dst;
510 goto out_unlock;
511 }
512 }
513 }
514
515out_unlock:
516 sctp_read_unlock(addr_lock);
517out:
518 if (dst)
519 SCTP_DEBUG_PRINTK("rt_dst:%u.%u.%u.%u, rt_src:%u.%u.%u.%u\n",
520 NIPQUAD(rt->rt_dst), NIPQUAD(rt->rt_src));
521 else
522 SCTP_DEBUG_PRINTK("NO ROUTE\n");
523
524 return dst;
525}
526
527/* For v4, the source address is cached in the route entry(dst). So no need
528 * to cache it separately and hence this is an empty routine.
529 */
530static void sctp_v4_get_saddr(struct sctp_association *asoc,
531 struct dst_entry *dst,
532 union sctp_addr *daddr,
533 union sctp_addr *saddr)
534{
535 struct rtable *rt = (struct rtable *)dst;
536
Vladislav Yasevich23ec47a2005-11-11 16:05:55 -0800537 if (!asoc)
538 return;
539
Linus Torvalds1da177e2005-04-16 15:20:36 -0700540 if (rt) {
541 saddr->v4.sin_family = AF_INET;
542 saddr->v4.sin_port = asoc->base.bind_addr.port;
543 saddr->v4.sin_addr.s_addr = rt->rt_src;
544 }
545}
546
547/* What interface did this skb arrive on? */
548static int sctp_v4_skb_iif(const struct sk_buff *skb)
549{
550 return ((struct rtable *)skb->dst)->rt_iif;
551}
552
553/* Was this packet marked by Explicit Congestion Notification? */
554static int sctp_v4_is_ce(const struct sk_buff *skb)
555{
556 return INET_ECN_is_ce(skb->nh.iph->tos);
557}
558
559/* Create and initialize a new sk for the socket returned by accept(). */
560static struct sock *sctp_v4_create_accept_sk(struct sock *sk,
561 struct sctp_association *asoc)
562{
563 struct inet_sock *inet = inet_sk(sk);
564 struct inet_sock *newinet;
565 struct sock *newsk = sk_alloc(PF_INET, GFP_KERNEL, sk->sk_prot, 1);
566
567 if (!newsk)
568 goto out;
569
570 sock_init_data(NULL, newsk);
571
572 newsk->sk_type = SOCK_STREAM;
573
574 newsk->sk_no_check = sk->sk_no_check;
575 newsk->sk_reuse = sk->sk_reuse;
576 newsk->sk_shutdown = sk->sk_shutdown;
577
578 newsk->sk_destruct = inet_sock_destruct;
579 newsk->sk_family = PF_INET;
580 newsk->sk_protocol = IPPROTO_SCTP;
581 newsk->sk_backlog_rcv = sk->sk_prot->backlog_rcv;
582 sock_reset_flag(newsk, SOCK_ZAPPED);
583
584 newinet = inet_sk(newsk);
585
586 /* Initialize sk's sport, dport, rcv_saddr and daddr for
587 * getsockname() and getpeername()
588 */
589 newinet->sport = inet->sport;
590 newinet->saddr = inet->saddr;
591 newinet->rcv_saddr = inet->rcv_saddr;
592 newinet->dport = htons(asoc->peer.port);
593 newinet->daddr = asoc->peer.primary_addr.v4.sin_addr.s_addr;
594 newinet->pmtudisc = inet->pmtudisc;
Vlad Yasevich4f444302006-10-30 18:54:32 -0800595 newinet->id = asoc->next_tsn ^ jiffies;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596
597 newinet->uc_ttl = -1;
598 newinet->mc_loop = 1;
599 newinet->mc_ttl = 1;
600 newinet->mc_index = 0;
601 newinet->mc_list = NULL;
602
Arnaldo Carvalho de Meloe6848972005-08-09 19:45:38 -0700603 sk_refcnt_debug_inc(newsk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700604
605 if (newsk->sk_prot->init(newsk)) {
606 sk_common_release(newsk);
607 newsk = NULL;
608 }
609
610out:
611 return newsk;
612}
613
614/* Map address, empty for v4 family */
615static void sctp_v4_addr_v4map(struct sctp_sock *sp, union sctp_addr *addr)
616{
617 /* Empty */
618}
619
620/* Dump the v4 addr to the seq file. */
621static void sctp_v4_seq_dump_addr(struct seq_file *seq, union sctp_addr *addr)
622{
623 seq_printf(seq, "%d.%d.%d.%d ", NIPQUAD(addr->v4.sin_addr));
624}
625
626/* Event handler for inet address addition/deletion events.
627 * Basically, whenever there is an event, we re-build our local address list.
628 */
629int sctp_inetaddr_event(struct notifier_block *this, unsigned long ev,
630 void *ptr)
631{
632 unsigned long flags;
633
634 sctp_spin_lock_irqsave(&sctp_local_addr_lock, flags);
635 __sctp_free_local_addr_list();
636 __sctp_get_local_addr_list();
637 sctp_spin_unlock_irqrestore(&sctp_local_addr_lock, flags);
638
639 return NOTIFY_DONE;
640}
641
642/*
643 * Initialize the control inode/socket with a control endpoint data
644 * structure. This endpoint is reserved exclusively for the OOTB processing.
645 */
646static int sctp_ctl_sock_init(void)
647{
648 int err;
649 sa_family_t family;
650
651 if (sctp_get_pf_specific(PF_INET6))
652 family = PF_INET6;
653 else
654 family = PF_INET;
655
656 err = sock_create_kern(family, SOCK_SEQPACKET, IPPROTO_SCTP,
657 &sctp_ctl_socket);
658 if (err < 0) {
659 printk(KERN_ERR
660 "SCTP: Failed to create the SCTP control socket.\n");
661 return err;
662 }
663 sctp_ctl_socket->sk->sk_allocation = GFP_ATOMIC;
664 inet_sk(sctp_ctl_socket->sk)->uc_ttl = -1;
665
666 return 0;
667}
668
669/* Register address family specific functions. */
670int sctp_register_af(struct sctp_af *af)
671{
672 switch (af->sa_family) {
673 case AF_INET:
674 if (sctp_af_v4_specific)
675 return 0;
676 sctp_af_v4_specific = af;
677 break;
678 case AF_INET6:
679 if (sctp_af_v6_specific)
680 return 0;
681 sctp_af_v6_specific = af;
682 break;
683 default:
684 return 0;
685 }
686
687 INIT_LIST_HEAD(&af->list);
688 list_add_tail(&af->list, &sctp_address_families);
689 return 1;
690}
691
692/* Get the table of functions for manipulating a particular address
693 * family.
694 */
695struct sctp_af *sctp_get_af_specific(sa_family_t family)
696{
697 switch (family) {
698 case AF_INET:
699 return sctp_af_v4_specific;
700 case AF_INET6:
701 return sctp_af_v6_specific;
702 default:
703 return NULL;
704 }
705}
706
707/* Common code to initialize a AF_INET msg_name. */
708static void sctp_inet_msgname(char *msgname, int *addr_len)
709{
710 struct sockaddr_in *sin;
711
712 sin = (struct sockaddr_in *)msgname;
713 *addr_len = sizeof(struct sockaddr_in);
714 sin->sin_family = AF_INET;
715 memset(sin->sin_zero, 0, sizeof(sin->sin_zero));
716}
717
718/* Copy the primary address of the peer primary address as the msg_name. */
719static void sctp_inet_event_msgname(struct sctp_ulpevent *event, char *msgname,
720 int *addr_len)
721{
722 struct sockaddr_in *sin, *sinfrom;
723
724 if (msgname) {
725 struct sctp_association *asoc;
726
727 asoc = event->asoc;
728 sctp_inet_msgname(msgname, addr_len);
729 sin = (struct sockaddr_in *)msgname;
730 sinfrom = &asoc->peer.primary_addr.v4;
731 sin->sin_port = htons(asoc->peer.port);
732 sin->sin_addr.s_addr = sinfrom->sin_addr.s_addr;
733 }
734}
735
736/* Initialize and copy out a msgname from an inbound skb. */
737static void sctp_inet_skb_msgname(struct sk_buff *skb, char *msgname, int *len)
738{
739 struct sctphdr *sh;
740 struct sockaddr_in *sin;
741
742 if (msgname) {
743 sctp_inet_msgname(msgname, len);
744 sin = (struct sockaddr_in *)msgname;
745 sh = (struct sctphdr *)skb->h.raw;
746 sin->sin_port = sh->source;
747 sin->sin_addr.s_addr = skb->nh.iph->saddr;
748 }
749}
750
751/* Do we support this AF? */
752static int sctp_inet_af_supported(sa_family_t family, struct sctp_sock *sp)
753{
754 /* PF_INET only supports AF_INET addresses. */
755 return (AF_INET == family);
756}
757
758/* Address matching with wildcards allowed. */
759static int sctp_inet_cmp_addr(const union sctp_addr *addr1,
760 const union sctp_addr *addr2,
761 struct sctp_sock *opt)
762{
763 /* PF_INET only supports AF_INET addresses. */
764 if (addr1->sa.sa_family != addr2->sa.sa_family)
765 return 0;
766 if (INADDR_ANY == addr1->v4.sin_addr.s_addr ||
767 INADDR_ANY == addr2->v4.sin_addr.s_addr)
768 return 1;
769 if (addr1->v4.sin_addr.s_addr == addr2->v4.sin_addr.s_addr)
770 return 1;
771
772 return 0;
773}
774
775/* Verify that provided sockaddr looks bindable. Common verification has
776 * already been taken care of.
777 */
778static int sctp_inet_bind_verify(struct sctp_sock *opt, union sctp_addr *addr)
779{
780 return sctp_v4_available(addr, opt);
781}
782
783/* Verify that sockaddr looks sendable. Common verification has already
784 * been taken care of.
785 */
786static int sctp_inet_send_verify(struct sctp_sock *opt, union sctp_addr *addr)
787{
788 return 1;
789}
790
791/* Fill in Supported Address Type information for INIT and INIT-ACK
792 * chunks. Returns number of addresses supported.
793 */
794static int sctp_inet_supported_addrs(const struct sctp_sock *opt,
795 __u16 *types)
796{
797 types[0] = SCTP_PARAM_IPV4_ADDRESS;
798 return 1;
799}
800
801/* Wrapper routine that calls the ip transmit routine. */
802static inline int sctp_v4_xmit(struct sk_buff *skb,
803 struct sctp_transport *transport, int ipfragok)
804{
805 SCTP_DEBUG_PRINTK("%s: skb:%p, len:%d, "
806 "src:%u.%u.%u.%u, dst:%u.%u.%u.%u\n",
807 __FUNCTION__, skb, skb->len,
808 NIPQUAD(((struct rtable *)skb->dst)->rt_src),
809 NIPQUAD(((struct rtable *)skb->dst)->rt_dst));
810
811 SCTP_INC_STATS(SCTP_MIB_OUTSCTPPACKS);
David S. Miller93173112006-11-09 19:58:25 -0800812 return ip_queue_xmit(skb, skb->sk, ipfragok);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700813}
814
815static struct sctp_af sctp_ipv4_specific;
816
817static struct sctp_pf sctp_pf_inet = {
818 .event_msgname = sctp_inet_event_msgname,
819 .skb_msgname = sctp_inet_skb_msgname,
820 .af_supported = sctp_inet_af_supported,
821 .cmp_addr = sctp_inet_cmp_addr,
822 .bind_verify = sctp_inet_bind_verify,
823 .send_verify = sctp_inet_send_verify,
824 .supported_addrs = sctp_inet_supported_addrs,
825 .create_accept_sk = sctp_v4_create_accept_sk,
826 .addr_v4map = sctp_v4_addr_v4map,
827 .af = &sctp_ipv4_specific,
828};
829
830/* Notifier for inetaddr addition/deletion events. */
831static struct notifier_block sctp_inetaddr_notifier = {
832 .notifier_call = sctp_inetaddr_event,
833};
834
835/* Socket operations. */
Eric Dumazet90ddc4f2005-12-22 12:49:22 -0800836static const struct proto_ops inet_seqpacket_ops = {
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800837 .family = PF_INET,
838 .owner = THIS_MODULE,
839 .release = inet_release, /* Needs to be wrapped... */
840 .bind = inet_bind,
841 .connect = inet_dgram_connect,
842 .socketpair = sock_no_socketpair,
843 .accept = inet_accept,
844 .getname = inet_getname, /* Semantics are different. */
845 .poll = sctp_poll,
846 .ioctl = inet_ioctl,
847 .listen = sctp_inet_listen,
848 .shutdown = inet_shutdown, /* Looks harmless. */
849 .setsockopt = sock_common_setsockopt, /* IP_SOL IP_OPTION is a problem */
850 .getsockopt = sock_common_getsockopt,
851 .sendmsg = inet_sendmsg,
852 .recvmsg = sock_common_recvmsg,
853 .mmap = sock_no_mmap,
854 .sendpage = sock_no_sendpage,
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800855#ifdef CONFIG_COMPAT
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800856 .compat_setsockopt = compat_sock_common_setsockopt,
857 .compat_getsockopt = compat_sock_common_getsockopt,
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800858#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700859};
860
861/* Registration with AF_INET family. */
862static struct inet_protosw sctp_seqpacket_protosw = {
863 .type = SOCK_SEQPACKET,
864 .protocol = IPPROTO_SCTP,
865 .prot = &sctp_prot,
866 .ops = &inet_seqpacket_ops,
867 .capability = -1,
868 .no_check = 0,
869 .flags = SCTP_PROTOSW_FLAG
870};
871static struct inet_protosw sctp_stream_protosw = {
872 .type = SOCK_STREAM,
873 .protocol = IPPROTO_SCTP,
874 .prot = &sctp_prot,
875 .ops = &inet_seqpacket_ops,
876 .capability = -1,
877 .no_check = 0,
878 .flags = SCTP_PROTOSW_FLAG
879};
880
881/* Register with IP layer. */
882static struct net_protocol sctp_protocol = {
883 .handler = sctp_rcv,
884 .err_handler = sctp_v4_err,
885 .no_policy = 1,
886};
887
888/* IPv4 address related functions. */
889static struct sctp_af sctp_ipv4_specific = {
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800890 .sa_family = AF_INET,
891 .sctp_xmit = sctp_v4_xmit,
892 .setsockopt = ip_setsockopt,
893 .getsockopt = ip_getsockopt,
894 .get_dst = sctp_v4_get_dst,
895 .get_saddr = sctp_v4_get_saddr,
896 .copy_addrlist = sctp_v4_copy_addrlist,
897 .from_skb = sctp_v4_from_skb,
898 .from_sk = sctp_v4_from_sk,
899 .to_sk_saddr = sctp_v4_to_sk_saddr,
900 .to_sk_daddr = sctp_v4_to_sk_daddr,
901 .from_addr_param = sctp_v4_from_addr_param,
902 .to_addr_param = sctp_v4_to_addr_param,
903 .dst_saddr = sctp_v4_dst_saddr,
904 .cmp_addr = sctp_v4_cmp_addr,
905 .addr_valid = sctp_v4_addr_valid,
906 .inaddr_any = sctp_v4_inaddr_any,
907 .is_any = sctp_v4_is_any,
908 .available = sctp_v4_available,
909 .scope = sctp_v4_scope,
910 .skb_iif = sctp_v4_skb_iif,
911 .is_ce = sctp_v4_is_ce,
912 .seq_dump_addr = sctp_v4_seq_dump_addr,
913 .net_header_len = sizeof(struct iphdr),
914 .sockaddr_len = sizeof(struct sockaddr_in),
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800915#ifdef CONFIG_COMPAT
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800916 .compat_setsockopt = compat_ip_setsockopt,
917 .compat_getsockopt = compat_ip_getsockopt,
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800918#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700919};
920
921struct sctp_pf *sctp_get_pf_specific(sa_family_t family) {
922
923 switch (family) {
924 case PF_INET:
925 return sctp_pf_inet_specific;
926 case PF_INET6:
927 return sctp_pf_inet6_specific;
928 default:
929 return NULL;
930 }
931}
932
933/* Register the PF specific function table. */
934int sctp_register_pf(struct sctp_pf *pf, sa_family_t family)
935{
936 switch (family) {
937 case PF_INET:
938 if (sctp_pf_inet_specific)
939 return 0;
940 sctp_pf_inet_specific = pf;
941 break;
942 case PF_INET6:
943 if (sctp_pf_inet6_specific)
944 return 0;
945 sctp_pf_inet6_specific = pf;
946 break;
947 default:
948 return 0;
949 }
950 return 1;
951}
952
953static int __init init_sctp_mibs(void)
954{
955 sctp_statistics[0] = alloc_percpu(struct sctp_mib);
956 if (!sctp_statistics[0])
957 return -ENOMEM;
958 sctp_statistics[1] = alloc_percpu(struct sctp_mib);
959 if (!sctp_statistics[1]) {
960 free_percpu(sctp_statistics[0]);
961 return -ENOMEM;
962 }
963 return 0;
964
965}
966
967static void cleanup_sctp_mibs(void)
968{
969 free_percpu(sctp_statistics[0]);
970 free_percpu(sctp_statistics[1]);
971}
972
973/* Initialize the universe into something sensible. */
974SCTP_STATIC __init int sctp_init(void)
975{
976 int i;
977 int status = -EINVAL;
978 unsigned long goal;
979 int order;
980
981 /* SCTP_DEBUG sanity check. */
982 if (!sctp_sanity_check())
983 goto out;
984
985 status = proto_register(&sctp_prot, 1);
986 if (status)
987 goto out;
988
989 /* Add SCTP to inet_protos hash table. */
990 status = -EAGAIN;
991 if (inet_add_protocol(&sctp_protocol, IPPROTO_SCTP) < 0)
992 goto err_add_protocol;
993
994 /* Add SCTP(TCP and UDP style) to inetsw linked list. */
995 inet_register_protosw(&sctp_seqpacket_protosw);
996 inet_register_protosw(&sctp_stream_protosw);
997
998 /* Allocate a cache pools. */
999 status = -ENOBUFS;
1000 sctp_bucket_cachep = kmem_cache_create("sctp_bind_bucket",
1001 sizeof(struct sctp_bind_bucket),
1002 0, SLAB_HWCACHE_ALIGN,
1003 NULL, NULL);
1004
1005 if (!sctp_bucket_cachep)
1006 goto err_bucket_cachep;
1007
1008 sctp_chunk_cachep = kmem_cache_create("sctp_chunk",
1009 sizeof(struct sctp_chunk),
1010 0, SLAB_HWCACHE_ALIGN,
1011 NULL, NULL);
1012 if (!sctp_chunk_cachep)
1013 goto err_chunk_cachep;
1014
1015 /* Allocate and initialise sctp mibs. */
1016 status = init_sctp_mibs();
1017 if (status)
1018 goto err_init_mibs;
1019
1020 /* Initialize proc fs directory. */
1021 status = sctp_proc_init();
1022 if (status)
1023 goto err_init_proc;
1024
1025 /* Initialize object count debugging. */
1026 sctp_dbg_objcnt_init();
1027
1028 /* Initialize the SCTP specific PF functions. */
1029 sctp_register_pf(&sctp_pf_inet, PF_INET);
1030 /*
1031 * 14. Suggested SCTP Protocol Parameter Values
1032 */
1033 /* The following protocol parameters are RECOMMENDED: */
1034 /* RTO.Initial - 3 seconds */
1035 sctp_rto_initial = SCTP_RTO_INITIAL;
1036 /* RTO.Min - 1 second */
1037 sctp_rto_min = SCTP_RTO_MIN;
1038 /* RTO.Max - 60 seconds */
1039 sctp_rto_max = SCTP_RTO_MAX;
1040 /* RTO.Alpha - 1/8 */
1041 sctp_rto_alpha = SCTP_RTO_ALPHA;
1042 /* RTO.Beta - 1/4 */
1043 sctp_rto_beta = SCTP_RTO_BETA;
1044
1045 /* Valid.Cookie.Life - 60 seconds */
Vladislav Yasevich3fd091e2006-08-22 13:29:17 -07001046 sctp_valid_cookie_life = SCTP_DEFAULT_COOKIE_LIFE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001047
1048 /* Whether Cookie Preservative is enabled(1) or not(0) */
1049 sctp_cookie_preserve_enable = 1;
1050
1051 /* Max.Burst - 4 */
1052 sctp_max_burst = SCTP_MAX_BURST;
1053
1054 /* Association.Max.Retrans - 10 attempts
1055 * Path.Max.Retrans - 5 attempts (per destination address)
1056 * Max.Init.Retransmits - 8 attempts
1057 */
1058 sctp_max_retrans_association = 10;
1059 sctp_max_retrans_path = 5;
1060 sctp_max_retrans_init = 8;
1061
Neil Horman4eb701d2005-04-28 12:02:04 -07001062 /* Sendbuffer growth - do per-socket accounting */
1063 sctp_sndbuf_policy = 0;
1064
Neil Horman049b3ff2005-11-11 16:08:24 -08001065 /* Rcvbuffer growth - do per-socket accounting */
1066 sctp_rcvbuf_policy = 0;
1067
Linus Torvalds1da177e2005-04-16 15:20:36 -07001068 /* HB.interval - 30 seconds */
Vlad Yasevich2f85a422005-06-28 13:24:23 -07001069 sctp_hb_interval = SCTP_DEFAULT_TIMEOUT_HEARTBEAT;
1070
1071 /* delayed SACK timeout */
1072 sctp_sack_timeout = SCTP_DEFAULT_TIMEOUT_SACK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001073
1074 /* Implementation specific variables. */
1075
1076 /* Initialize default stream count setup information. */
1077 sctp_max_instreams = SCTP_DEFAULT_INSTREAMS;
1078 sctp_max_outstreams = SCTP_DEFAULT_OUTSTREAMS;
1079
1080 /* Initialize handle used for association ids. */
1081 idr_init(&sctp_assocs_id);
1082
1083 /* Size and allocate the association hash table.
1084 * The methodology is similar to that of the tcp hash tables.
1085 */
1086 if (num_physpages >= (128 * 1024))
1087 goal = num_physpages >> (22 - PAGE_SHIFT);
1088 else
1089 goal = num_physpages >> (24 - PAGE_SHIFT);
1090
1091 for (order = 0; (1UL << order) < goal; order++)
1092 ;
1093
1094 do {
1095 sctp_assoc_hashsize = (1UL << order) * PAGE_SIZE /
1096 sizeof(struct sctp_hashbucket);
1097 if ((sctp_assoc_hashsize > (64 * 1024)) && order > 0)
1098 continue;
1099 sctp_assoc_hashtable = (struct sctp_hashbucket *)
1100 __get_free_pages(GFP_ATOMIC, order);
1101 } while (!sctp_assoc_hashtable && --order > 0);
1102 if (!sctp_assoc_hashtable) {
1103 printk(KERN_ERR "SCTP: Failed association hash alloc.\n");
1104 status = -ENOMEM;
1105 goto err_ahash_alloc;
1106 }
1107 for (i = 0; i < sctp_assoc_hashsize; i++) {
1108 rwlock_init(&sctp_assoc_hashtable[i].lock);
1109 sctp_assoc_hashtable[i].chain = NULL;
1110 }
1111
1112 /* Allocate and initialize the endpoint hash table. */
1113 sctp_ep_hashsize = 64;
1114 sctp_ep_hashtable = (struct sctp_hashbucket *)
1115 kmalloc(64 * sizeof(struct sctp_hashbucket), GFP_KERNEL);
1116 if (!sctp_ep_hashtable) {
1117 printk(KERN_ERR "SCTP: Failed endpoint_hash alloc.\n");
1118 status = -ENOMEM;
1119 goto err_ehash_alloc;
1120 }
1121 for (i = 0; i < sctp_ep_hashsize; i++) {
1122 rwlock_init(&sctp_ep_hashtable[i].lock);
1123 sctp_ep_hashtable[i].chain = NULL;
1124 }
1125
1126 /* Allocate and initialize the SCTP port hash table. */
1127 do {
1128 sctp_port_hashsize = (1UL << order) * PAGE_SIZE /
1129 sizeof(struct sctp_bind_hashbucket);
1130 if ((sctp_port_hashsize > (64 * 1024)) && order > 0)
1131 continue;
1132 sctp_port_hashtable = (struct sctp_bind_hashbucket *)
1133 __get_free_pages(GFP_ATOMIC, order);
1134 } while (!sctp_port_hashtable && --order > 0);
1135 if (!sctp_port_hashtable) {
1136 printk(KERN_ERR "SCTP: Failed bind hash alloc.");
1137 status = -ENOMEM;
1138 goto err_bhash_alloc;
1139 }
1140 for (i = 0; i < sctp_port_hashsize; i++) {
1141 spin_lock_init(&sctp_port_hashtable[i].lock);
1142 sctp_port_hashtable[i].chain = NULL;
1143 }
1144
1145 spin_lock_init(&sctp_port_alloc_lock);
1146 sctp_port_rover = sysctl_local_port_range[0] - 1;
1147
1148 printk(KERN_INFO "SCTP: Hash tables configured "
1149 "(established %d bind %d)\n",
1150 sctp_assoc_hashsize, sctp_port_hashsize);
1151
1152 /* Disable ADDIP by default. */
1153 sctp_addip_enable = 0;
1154
1155 /* Enable PR-SCTP by default. */
1156 sctp_prsctp_enable = 1;
1157
1158 sctp_sysctl_register();
1159
1160 INIT_LIST_HEAD(&sctp_address_families);
1161 sctp_register_af(&sctp_ipv4_specific);
1162
1163 status = sctp_v6_init();
1164 if (status)
1165 goto err_v6_init;
1166
1167 /* Initialize the control inode/socket for handling OOTB packets. */
1168 if ((status = sctp_ctl_sock_init())) {
1169 printk (KERN_ERR
1170 "SCTP: Failed to initialize the SCTP control sock.\n");
1171 goto err_ctl_sock_init;
1172 }
1173
1174 /* Initialize the local address list. */
1175 INIT_LIST_HEAD(&sctp_local_addr_list);
1176 spin_lock_init(&sctp_local_addr_lock);
1177
1178 /* Register notifier for inet address additions/deletions. */
1179 register_inetaddr_notifier(&sctp_inetaddr_notifier);
1180
1181 sctp_get_local_addr_list();
1182
1183 __unsafe(THIS_MODULE);
1184 status = 0;
1185out:
1186 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001187err_ctl_sock_init:
1188 sctp_v6_exit();
1189err_v6_init:
1190 sctp_sysctl_unregister();
1191 list_del(&sctp_ipv4_specific.list);
1192 free_pages((unsigned long)sctp_port_hashtable,
1193 get_order(sctp_port_hashsize *
1194 sizeof(struct sctp_bind_hashbucket)));
1195err_bhash_alloc:
1196 kfree(sctp_ep_hashtable);
1197err_ehash_alloc:
1198 free_pages((unsigned long)sctp_assoc_hashtable,
1199 get_order(sctp_assoc_hashsize *
1200 sizeof(struct sctp_hashbucket)));
1201err_ahash_alloc:
1202 sctp_dbg_objcnt_exit();
1203err_init_proc:
1204 sctp_proc_exit();
1205 cleanup_sctp_mibs();
1206err_init_mibs:
1207 kmem_cache_destroy(sctp_chunk_cachep);
1208err_chunk_cachep:
1209 kmem_cache_destroy(sctp_bucket_cachep);
1210err_bucket_cachep:
1211 inet_del_protocol(&sctp_protocol, IPPROTO_SCTP);
1212 inet_unregister_protosw(&sctp_seqpacket_protosw);
1213 inet_unregister_protosw(&sctp_stream_protosw);
Neil Horman5e6bc342005-04-28 11:59:49 -07001214err_add_protocol:
1215 proto_unregister(&sctp_prot);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001216 goto out;
1217}
1218
1219/* Exit handler for the SCTP protocol. */
1220SCTP_STATIC __exit void sctp_exit(void)
1221{
1222 /* BUG. This should probably do something useful like clean
1223 * up all the remaining associations and all that memory.
1224 */
1225
1226 /* Unregister notifier for inet address additions/deletions. */
1227 unregister_inetaddr_notifier(&sctp_inetaddr_notifier);
1228
1229 /* Free the local address list. */
1230 sctp_free_local_addr_list();
1231
1232 /* Free the control endpoint. */
1233 sock_release(sctp_ctl_socket);
1234
1235 sctp_v6_exit();
1236 sctp_sysctl_unregister();
1237 list_del(&sctp_ipv4_specific.list);
1238
1239 free_pages((unsigned long)sctp_assoc_hashtable,
1240 get_order(sctp_assoc_hashsize *
1241 sizeof(struct sctp_hashbucket)));
1242 kfree(sctp_ep_hashtable);
1243 free_pages((unsigned long)sctp_port_hashtable,
1244 get_order(sctp_port_hashsize *
1245 sizeof(struct sctp_bind_hashbucket)));
1246
1247 kmem_cache_destroy(sctp_chunk_cachep);
1248 kmem_cache_destroy(sctp_bucket_cachep);
1249
1250 sctp_dbg_objcnt_exit();
1251 sctp_proc_exit();
1252 cleanup_sctp_mibs();
1253
1254 inet_del_protocol(&sctp_protocol, IPPROTO_SCTP);
1255 inet_unregister_protosw(&sctp_seqpacket_protosw);
1256 inet_unregister_protosw(&sctp_stream_protosw);
1257 proto_unregister(&sctp_prot);
1258}
1259
1260module_init(sctp_init);
1261module_exit(sctp_exit);
1262
Arnaldo Carvalho de Melobb97d312005-08-09 20:19:14 -07001263/*
1264 * __stringify doesn't likes enums, so use IPPROTO_SCTP value (132) directly.
1265 */
1266MODULE_ALIAS("net-pf-" __stringify(PF_INET) "-proto-132");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001267MODULE_AUTHOR("Linux Kernel SCTP developers <lksctp-developers@lists.sourceforge.net>");
1268MODULE_DESCRIPTION("Support for the SCTP protocol (RFC2960)");
1269MODULE_LICENSE("GPL");