Contents of /alx-src/tags/kernel26-2.6.12-alx-r9/net/sctp/protocol.c
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Wed Mar 4 11:03:09 2009 UTC (15 years, 3 months ago) by niro
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Wed Mar 4 11:03:09 2009 UTC (15 years, 3 months ago) by niro
File MIME type: text/plain
File size: 34127 byte(s)
Tag kernel26-2.6.12-alx-r9
1 | /* 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> |
57 | #include <net/sctp/sctp.h> |
58 | #include <net/addrconf.h> |
59 | #include <net/inet_common.h> |
60 | #include <net/inet_ecn.h> |
61 | |
62 | /* Global data structures. */ |
63 | struct sctp_globals sctp_globals; |
64 | struct proc_dir_entry *proc_net_sctp; |
65 | DEFINE_SNMP_STAT(struct sctp_mib, sctp_statistics); |
66 | |
67 | struct idr sctp_assocs_id; |
68 | DEFINE_SPINLOCK(sctp_assocs_id_lock); |
69 | |
70 | /* This is the global socket data structure used for responding to |
71 | * the Out-of-the-blue (OOTB) packets. A control sock will be created |
72 | * for this socket at the initialization time. |
73 | */ |
74 | static struct socket *sctp_ctl_socket; |
75 | |
76 | static struct sctp_pf *sctp_pf_inet6_specific; |
77 | static struct sctp_pf *sctp_pf_inet_specific; |
78 | static struct sctp_af *sctp_af_v4_specific; |
79 | static struct sctp_af *sctp_af_v6_specific; |
80 | |
81 | kmem_cache_t *sctp_chunk_cachep; |
82 | kmem_cache_t *sctp_bucket_cachep; |
83 | |
84 | extern int sctp_snmp_proc_init(void); |
85 | extern int sctp_snmp_proc_exit(void); |
86 | extern int sctp_eps_proc_init(void); |
87 | extern int sctp_eps_proc_exit(void); |
88 | extern int sctp_assocs_proc_init(void); |
89 | extern int sctp_assocs_proc_exit(void); |
90 | |
91 | /* Return the address of the control sock. */ |
92 | struct sock *sctp_get_ctl_sock(void) |
93 | { |
94 | return sctp_ctl_socket->sk; |
95 | } |
96 | |
97 | /* Set up the proc fs entry for the SCTP protocol. */ |
98 | static __init int sctp_proc_init(void) |
99 | { |
100 | if (!proc_net_sctp) { |
101 | struct proc_dir_entry *ent; |
102 | ent = proc_mkdir("net/sctp", NULL); |
103 | if (ent) { |
104 | ent->owner = THIS_MODULE; |
105 | proc_net_sctp = ent; |
106 | } else |
107 | goto out_nomem; |
108 | } |
109 | |
110 | if (sctp_snmp_proc_init()) |
111 | goto out_nomem; |
112 | if (sctp_eps_proc_init()) |
113 | goto out_nomem; |
114 | if (sctp_assocs_proc_init()) |
115 | goto out_nomem; |
116 | |
117 | return 0; |
118 | |
119 | out_nomem: |
120 | return -ENOMEM; |
121 | } |
122 | |
123 | /* Clean up the proc fs entry for the SCTP protocol. |
124 | * Note: Do not make this __exit as it is used in the init error |
125 | * path. |
126 | */ |
127 | static void sctp_proc_exit(void) |
128 | { |
129 | sctp_snmp_proc_exit(); |
130 | sctp_eps_proc_exit(); |
131 | sctp_assocs_proc_exit(); |
132 | |
133 | if (proc_net_sctp) { |
134 | proc_net_sctp = NULL; |
135 | remove_proc_entry("net/sctp", NULL); |
136 | } |
137 | } |
138 | |
139 | /* Private helper to extract ipv4 address and stash them in |
140 | * the protocol structure. |
141 | */ |
142 | static void sctp_v4_copy_addrlist(struct list_head *addrlist, |
143 | struct net_device *dev) |
144 | { |
145 | struct in_device *in_dev; |
146 | struct in_ifaddr *ifa; |
147 | struct sctp_sockaddr_entry *addr; |
148 | |
149 | rcu_read_lock(); |
150 | if ((in_dev = __in_dev_get(dev)) == NULL) { |
151 | rcu_read_unlock(); |
152 | return; |
153 | } |
154 | |
155 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { |
156 | /* Add the address to the local list. */ |
157 | addr = t_new(struct sctp_sockaddr_entry, GFP_ATOMIC); |
158 | if (addr) { |
159 | addr->a.v4.sin_family = AF_INET; |
160 | addr->a.v4.sin_port = 0; |
161 | addr->a.v4.sin_addr.s_addr = ifa->ifa_local; |
162 | list_add_tail(&addr->list, addrlist); |
163 | } |
164 | } |
165 | |
166 | rcu_read_unlock(); |
167 | } |
168 | |
169 | /* Extract our IP addresses from the system and stash them in the |
170 | * protocol structure. |
171 | */ |
172 | static void __sctp_get_local_addr_list(void) |
173 | { |
174 | struct net_device *dev; |
175 | struct list_head *pos; |
176 | struct sctp_af *af; |
177 | |
178 | read_lock(&dev_base_lock); |
179 | for (dev = dev_base; dev; dev = dev->next) { |
180 | __list_for_each(pos, &sctp_address_families) { |
181 | af = list_entry(pos, struct sctp_af, list); |
182 | af->copy_addrlist(&sctp_local_addr_list, dev); |
183 | } |
184 | } |
185 | read_unlock(&dev_base_lock); |
186 | } |
187 | |
188 | static void sctp_get_local_addr_list(void) |
189 | { |
190 | unsigned long flags; |
191 | |
192 | sctp_spin_lock_irqsave(&sctp_local_addr_lock, flags); |
193 | __sctp_get_local_addr_list(); |
194 | sctp_spin_unlock_irqrestore(&sctp_local_addr_lock, flags); |
195 | } |
196 | |
197 | /* Free the existing local addresses. */ |
198 | static void __sctp_free_local_addr_list(void) |
199 | { |
200 | struct sctp_sockaddr_entry *addr; |
201 | struct list_head *pos, *temp; |
202 | |
203 | list_for_each_safe(pos, temp, &sctp_local_addr_list) { |
204 | addr = list_entry(pos, struct sctp_sockaddr_entry, list); |
205 | list_del(pos); |
206 | kfree(addr); |
207 | } |
208 | } |
209 | |
210 | /* Free the existing local addresses. */ |
211 | static void sctp_free_local_addr_list(void) |
212 | { |
213 | unsigned long flags; |
214 | |
215 | sctp_spin_lock_irqsave(&sctp_local_addr_lock, flags); |
216 | __sctp_free_local_addr_list(); |
217 | sctp_spin_unlock_irqrestore(&sctp_local_addr_lock, flags); |
218 | } |
219 | |
220 | /* Copy the local addresses which are valid for 'scope' into 'bp'. */ |
221 | int sctp_copy_local_addr_list(struct sctp_bind_addr *bp, sctp_scope_t scope, |
222 | int gfp, int copy_flags) |
223 | { |
224 | struct sctp_sockaddr_entry *addr; |
225 | int error = 0; |
226 | struct list_head *pos; |
227 | unsigned long flags; |
228 | |
229 | sctp_spin_lock_irqsave(&sctp_local_addr_lock, flags); |
230 | list_for_each(pos, &sctp_local_addr_list) { |
231 | addr = list_entry(pos, struct sctp_sockaddr_entry, list); |
232 | if (sctp_in_scope(&addr->a, scope)) { |
233 | /* Now that the address is in scope, check to see if |
234 | * the address type is really supported by the local |
235 | * sock as well as the remote peer. |
236 | */ |
237 | if ((((AF_INET == addr->a.sa.sa_family) && |
238 | (copy_flags & SCTP_ADDR4_PEERSUPP))) || |
239 | (((AF_INET6 == addr->a.sa.sa_family) && |
240 | (copy_flags & SCTP_ADDR6_ALLOWED) && |
241 | (copy_flags & SCTP_ADDR6_PEERSUPP)))) { |
242 | error = sctp_add_bind_addr(bp, &addr->a, |
243 | GFP_ATOMIC); |
244 | if (error) |
245 | goto end_copy; |
246 | } |
247 | } |
248 | } |
249 | |
250 | end_copy: |
251 | sctp_spin_unlock_irqrestore(&sctp_local_addr_lock, flags); |
252 | return error; |
253 | } |
254 | |
255 | /* Initialize a sctp_addr from in incoming skb. */ |
256 | static void sctp_v4_from_skb(union sctp_addr *addr, struct sk_buff *skb, |
257 | int is_saddr) |
258 | { |
259 | void *from; |
260 | __u16 *port; |
261 | struct sctphdr *sh; |
262 | |
263 | port = &addr->v4.sin_port; |
264 | addr->v4.sin_family = AF_INET; |
265 | |
266 | sh = (struct sctphdr *) skb->h.raw; |
267 | if (is_saddr) { |
268 | *port = ntohs(sh->source); |
269 | from = &skb->nh.iph->saddr; |
270 | } else { |
271 | *port = ntohs(sh->dest); |
272 | from = &skb->nh.iph->daddr; |
273 | } |
274 | memcpy(&addr->v4.sin_addr.s_addr, from, sizeof(struct in_addr)); |
275 | } |
276 | |
277 | /* Initialize an sctp_addr from a socket. */ |
278 | static void sctp_v4_from_sk(union sctp_addr *addr, struct sock *sk) |
279 | { |
280 | addr->v4.sin_family = AF_INET; |
281 | addr->v4.sin_port = inet_sk(sk)->num; |
282 | addr->v4.sin_addr.s_addr = inet_sk(sk)->rcv_saddr; |
283 | } |
284 | |
285 | /* Initialize sk->sk_rcv_saddr from sctp_addr. */ |
286 | static void sctp_v4_to_sk_saddr(union sctp_addr *addr, struct sock *sk) |
287 | { |
288 | inet_sk(sk)->rcv_saddr = addr->v4.sin_addr.s_addr; |
289 | } |
290 | |
291 | /* Initialize sk->sk_daddr from sctp_addr. */ |
292 | static void sctp_v4_to_sk_daddr(union sctp_addr *addr, struct sock *sk) |
293 | { |
294 | inet_sk(sk)->daddr = addr->v4.sin_addr.s_addr; |
295 | } |
296 | |
297 | /* Initialize a sctp_addr from an address parameter. */ |
298 | static void sctp_v4_from_addr_param(union sctp_addr *addr, |
299 | union sctp_addr_param *param, |
300 | __u16 port, int iif) |
301 | { |
302 | addr->v4.sin_family = AF_INET; |
303 | addr->v4.sin_port = port; |
304 | addr->v4.sin_addr.s_addr = param->v4.addr.s_addr; |
305 | } |
306 | |
307 | /* Initialize an address parameter from a sctp_addr and return the length |
308 | * of the address parameter. |
309 | */ |
310 | static int sctp_v4_to_addr_param(const union sctp_addr *addr, |
311 | union sctp_addr_param *param) |
312 | { |
313 | int length = sizeof(sctp_ipv4addr_param_t); |
314 | |
315 | param->v4.param_hdr.type = SCTP_PARAM_IPV4_ADDRESS; |
316 | param->v4.param_hdr.length = ntohs(length); |
317 | param->v4.addr.s_addr = addr->v4.sin_addr.s_addr; |
318 | |
319 | return length; |
320 | } |
321 | |
322 | /* Initialize a sctp_addr from a dst_entry. */ |
323 | static void sctp_v4_dst_saddr(union sctp_addr *saddr, struct dst_entry *dst, |
324 | unsigned short port) |
325 | { |
326 | struct rtable *rt = (struct rtable *)dst; |
327 | saddr->v4.sin_family = AF_INET; |
328 | saddr->v4.sin_port = port; |
329 | saddr->v4.sin_addr.s_addr = rt->rt_src; |
330 | } |
331 | |
332 | /* Compare two addresses exactly. */ |
333 | static int sctp_v4_cmp_addr(const union sctp_addr *addr1, |
334 | const union sctp_addr *addr2) |
335 | { |
336 | if (addr1->sa.sa_family != addr2->sa.sa_family) |
337 | return 0; |
338 | if (addr1->v4.sin_port != addr2->v4.sin_port) |
339 | return 0; |
340 | if (addr1->v4.sin_addr.s_addr != addr2->v4.sin_addr.s_addr) |
341 | return 0; |
342 | |
343 | return 1; |
344 | } |
345 | |
346 | /* Initialize addr struct to INADDR_ANY. */ |
347 | static void sctp_v4_inaddr_any(union sctp_addr *addr, unsigned short port) |
348 | { |
349 | addr->v4.sin_family = AF_INET; |
350 | addr->v4.sin_addr.s_addr = INADDR_ANY; |
351 | addr->v4.sin_port = port; |
352 | } |
353 | |
354 | /* Is this a wildcard address? */ |
355 | static int sctp_v4_is_any(const union sctp_addr *addr) |
356 | { |
357 | return INADDR_ANY == addr->v4.sin_addr.s_addr; |
358 | } |
359 | |
360 | /* This function checks if the address is a valid address to be used for |
361 | * SCTP binding. |
362 | * |
363 | * Output: |
364 | * Return 0 - If the address is a non-unicast or an illegal address. |
365 | * Return 1 - If the address is a unicast. |
366 | */ |
367 | static int sctp_v4_addr_valid(union sctp_addr *addr, struct sctp_sock *sp) |
368 | { |
369 | /* Is this a non-unicast address or a unusable SCTP address? */ |
370 | if (IS_IPV4_UNUSABLE_ADDRESS(&addr->v4.sin_addr.s_addr)) |
371 | return 0; |
372 | |
373 | return 1; |
374 | } |
375 | |
376 | /* Should this be available for binding? */ |
377 | static 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 | |
381 | |
382 | if (addr->v4.sin_addr.s_addr != INADDR_ANY && |
383 | ret != RTN_LOCAL && |
384 | !sp->inet.freebind && |
385 | !sysctl_ip_nonlocal_bind) |
386 | return 0; |
387 | |
388 | 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 | */ |
405 | static 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 | */ |
434 | static 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); |
482 | sctp_v4_dst_saddr(&dst_saddr, dst, bp->port); |
483 | if (sctp_v4_cmp_addr(&dst_saddr, &laddr->a)) |
484 | goto out_unlock; |
485 | } |
486 | sctp_read_unlock(addr_lock); |
487 | |
488 | /* None of the bound addresses match the source address of the |
489 | * dst. So release it. |
490 | */ |
491 | dst_release(dst); |
492 | dst = NULL; |
493 | } |
494 | |
495 | /* Walk through the bind address list and try to get a dst that |
496 | * matches a bind address as the source address. |
497 | */ |
498 | sctp_read_lock(addr_lock); |
499 | list_for_each(pos, &bp->address_list) { |
500 | laddr = list_entry(pos, struct sctp_sockaddr_entry, list); |
501 | |
502 | if (AF_INET == laddr->a.sa.sa_family) { |
503 | fl.fl4_src = laddr->a.v4.sin_addr.s_addr; |
504 | if (!ip_route_output_key(&rt, &fl)) { |
505 | dst = &rt->u.dst; |
506 | goto out_unlock; |
507 | } |
508 | } |
509 | } |
510 | |
511 | out_unlock: |
512 | sctp_read_unlock(addr_lock); |
513 | out: |
514 | if (dst) |
515 | SCTP_DEBUG_PRINTK("rt_dst:%u.%u.%u.%u, rt_src:%u.%u.%u.%u\n", |
516 | NIPQUAD(rt->rt_dst), NIPQUAD(rt->rt_src)); |
517 | else |
518 | SCTP_DEBUG_PRINTK("NO ROUTE\n"); |
519 | |
520 | return dst; |
521 | } |
522 | |
523 | /* For v4, the source address is cached in the route entry(dst). So no need |
524 | * to cache it separately and hence this is an empty routine. |
525 | */ |
526 | static void sctp_v4_get_saddr(struct sctp_association *asoc, |
527 | struct dst_entry *dst, |
528 | union sctp_addr *daddr, |
529 | union sctp_addr *saddr) |
530 | { |
531 | struct rtable *rt = (struct rtable *)dst; |
532 | |
533 | if (rt) { |
534 | saddr->v4.sin_family = AF_INET; |
535 | saddr->v4.sin_port = asoc->base.bind_addr.port; |
536 | saddr->v4.sin_addr.s_addr = rt->rt_src; |
537 | } |
538 | } |
539 | |
540 | /* What interface did this skb arrive on? */ |
541 | static int sctp_v4_skb_iif(const struct sk_buff *skb) |
542 | { |
543 | return ((struct rtable *)skb->dst)->rt_iif; |
544 | } |
545 | |
546 | /* Was this packet marked by Explicit Congestion Notification? */ |
547 | static int sctp_v4_is_ce(const struct sk_buff *skb) |
548 | { |
549 | return INET_ECN_is_ce(skb->nh.iph->tos); |
550 | } |
551 | |
552 | /* Create and initialize a new sk for the socket returned by accept(). */ |
553 | static struct sock *sctp_v4_create_accept_sk(struct sock *sk, |
554 | struct sctp_association *asoc) |
555 | { |
556 | struct inet_sock *inet = inet_sk(sk); |
557 | struct inet_sock *newinet; |
558 | struct sock *newsk = sk_alloc(PF_INET, GFP_KERNEL, sk->sk_prot, 1); |
559 | |
560 | if (!newsk) |
561 | goto out; |
562 | |
563 | sock_init_data(NULL, newsk); |
564 | |
565 | newsk->sk_type = SOCK_STREAM; |
566 | |
567 | newsk->sk_no_check = sk->sk_no_check; |
568 | newsk->sk_reuse = sk->sk_reuse; |
569 | newsk->sk_shutdown = sk->sk_shutdown; |
570 | |
571 | newsk->sk_destruct = inet_sock_destruct; |
572 | newsk->sk_family = PF_INET; |
573 | newsk->sk_protocol = IPPROTO_SCTP; |
574 | newsk->sk_backlog_rcv = sk->sk_prot->backlog_rcv; |
575 | sock_reset_flag(newsk, SOCK_ZAPPED); |
576 | |
577 | newinet = inet_sk(newsk); |
578 | |
579 | /* Initialize sk's sport, dport, rcv_saddr and daddr for |
580 | * getsockname() and getpeername() |
581 | */ |
582 | newinet->sport = inet->sport; |
583 | newinet->saddr = inet->saddr; |
584 | newinet->rcv_saddr = inet->rcv_saddr; |
585 | newinet->dport = htons(asoc->peer.port); |
586 | newinet->daddr = asoc->peer.primary_addr.v4.sin_addr.s_addr; |
587 | newinet->pmtudisc = inet->pmtudisc; |
588 | newinet->id = 0; |
589 | |
590 | newinet->uc_ttl = -1; |
591 | newinet->mc_loop = 1; |
592 | newinet->mc_ttl = 1; |
593 | newinet->mc_index = 0; |
594 | newinet->mc_list = NULL; |
595 | |
596 | #ifdef INET_REFCNT_DEBUG |
597 | atomic_inc(&inet_sock_nr); |
598 | #endif |
599 | |
600 | if (newsk->sk_prot->init(newsk)) { |
601 | sk_common_release(newsk); |
602 | newsk = NULL; |
603 | } |
604 | |
605 | out: |
606 | return newsk; |
607 | } |
608 | |
609 | /* Map address, empty for v4 family */ |
610 | static void sctp_v4_addr_v4map(struct sctp_sock *sp, union sctp_addr *addr) |
611 | { |
612 | /* Empty */ |
613 | } |
614 | |
615 | /* Dump the v4 addr to the seq file. */ |
616 | static void sctp_v4_seq_dump_addr(struct seq_file *seq, union sctp_addr *addr) |
617 | { |
618 | seq_printf(seq, "%d.%d.%d.%d ", NIPQUAD(addr->v4.sin_addr)); |
619 | } |
620 | |
621 | /* Event handler for inet address addition/deletion events. |
622 | * Basically, whenever there is an event, we re-build our local address list. |
623 | */ |
624 | int sctp_inetaddr_event(struct notifier_block *this, unsigned long ev, |
625 | void *ptr) |
626 | { |
627 | unsigned long flags; |
628 | |
629 | sctp_spin_lock_irqsave(&sctp_local_addr_lock, flags); |
630 | __sctp_free_local_addr_list(); |
631 | __sctp_get_local_addr_list(); |
632 | sctp_spin_unlock_irqrestore(&sctp_local_addr_lock, flags); |
633 | |
634 | return NOTIFY_DONE; |
635 | } |
636 | |
637 | /* |
638 | * Initialize the control inode/socket with a control endpoint data |
639 | * structure. This endpoint is reserved exclusively for the OOTB processing. |
640 | */ |
641 | static int sctp_ctl_sock_init(void) |
642 | { |
643 | int err; |
644 | sa_family_t family; |
645 | |
646 | if (sctp_get_pf_specific(PF_INET6)) |
647 | family = PF_INET6; |
648 | else |
649 | family = PF_INET; |
650 | |
651 | err = sock_create_kern(family, SOCK_SEQPACKET, IPPROTO_SCTP, |
652 | &sctp_ctl_socket); |
653 | if (err < 0) { |
654 | printk(KERN_ERR |
655 | "SCTP: Failed to create the SCTP control socket.\n"); |
656 | return err; |
657 | } |
658 | sctp_ctl_socket->sk->sk_allocation = GFP_ATOMIC; |
659 | inet_sk(sctp_ctl_socket->sk)->uc_ttl = -1; |
660 | |
661 | return 0; |
662 | } |
663 | |
664 | /* Register address family specific functions. */ |
665 | int sctp_register_af(struct sctp_af *af) |
666 | { |
667 | switch (af->sa_family) { |
668 | case AF_INET: |
669 | if (sctp_af_v4_specific) |
670 | return 0; |
671 | sctp_af_v4_specific = af; |
672 | break; |
673 | case AF_INET6: |
674 | if (sctp_af_v6_specific) |
675 | return 0; |
676 | sctp_af_v6_specific = af; |
677 | break; |
678 | default: |
679 | return 0; |
680 | } |
681 | |
682 | INIT_LIST_HEAD(&af->list); |
683 | list_add_tail(&af->list, &sctp_address_families); |
684 | return 1; |
685 | } |
686 | |
687 | /* Get the table of functions for manipulating a particular address |
688 | * family. |
689 | */ |
690 | struct sctp_af *sctp_get_af_specific(sa_family_t family) |
691 | { |
692 | switch (family) { |
693 | case AF_INET: |
694 | return sctp_af_v4_specific; |
695 | case AF_INET6: |
696 | return sctp_af_v6_specific; |
697 | default: |
698 | return NULL; |
699 | } |
700 | } |
701 | |
702 | /* Common code to initialize a AF_INET msg_name. */ |
703 | static void sctp_inet_msgname(char *msgname, int *addr_len) |
704 | { |
705 | struct sockaddr_in *sin; |
706 | |
707 | sin = (struct sockaddr_in *)msgname; |
708 | *addr_len = sizeof(struct sockaddr_in); |
709 | sin->sin_family = AF_INET; |
710 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); |
711 | } |
712 | |
713 | /* Copy the primary address of the peer primary address as the msg_name. */ |
714 | static void sctp_inet_event_msgname(struct sctp_ulpevent *event, char *msgname, |
715 | int *addr_len) |
716 | { |
717 | struct sockaddr_in *sin, *sinfrom; |
718 | |
719 | if (msgname) { |
720 | struct sctp_association *asoc; |
721 | |
722 | asoc = event->asoc; |
723 | sctp_inet_msgname(msgname, addr_len); |
724 | sin = (struct sockaddr_in *)msgname; |
725 | sinfrom = &asoc->peer.primary_addr.v4; |
726 | sin->sin_port = htons(asoc->peer.port); |
727 | sin->sin_addr.s_addr = sinfrom->sin_addr.s_addr; |
728 | } |
729 | } |
730 | |
731 | /* Initialize and copy out a msgname from an inbound skb. */ |
732 | static void sctp_inet_skb_msgname(struct sk_buff *skb, char *msgname, int *len) |
733 | { |
734 | struct sctphdr *sh; |
735 | struct sockaddr_in *sin; |
736 | |
737 | if (msgname) { |
738 | sctp_inet_msgname(msgname, len); |
739 | sin = (struct sockaddr_in *)msgname; |
740 | sh = (struct sctphdr *)skb->h.raw; |
741 | sin->sin_port = sh->source; |
742 | sin->sin_addr.s_addr = skb->nh.iph->saddr; |
743 | } |
744 | } |
745 | |
746 | /* Do we support this AF? */ |
747 | static int sctp_inet_af_supported(sa_family_t family, struct sctp_sock *sp) |
748 | { |
749 | /* PF_INET only supports AF_INET addresses. */ |
750 | return (AF_INET == family); |
751 | } |
752 | |
753 | /* Address matching with wildcards allowed. */ |
754 | static int sctp_inet_cmp_addr(const union sctp_addr *addr1, |
755 | const union sctp_addr *addr2, |
756 | struct sctp_sock *opt) |
757 | { |
758 | /* PF_INET only supports AF_INET addresses. */ |
759 | if (addr1->sa.sa_family != addr2->sa.sa_family) |
760 | return 0; |
761 | if (INADDR_ANY == addr1->v4.sin_addr.s_addr || |
762 | INADDR_ANY == addr2->v4.sin_addr.s_addr) |
763 | return 1; |
764 | if (addr1->v4.sin_addr.s_addr == addr2->v4.sin_addr.s_addr) |
765 | return 1; |
766 | |
767 | return 0; |
768 | } |
769 | |
770 | /* Verify that provided sockaddr looks bindable. Common verification has |
771 | * already been taken care of. |
772 | */ |
773 | static int sctp_inet_bind_verify(struct sctp_sock *opt, union sctp_addr *addr) |
774 | { |
775 | return sctp_v4_available(addr, opt); |
776 | } |
777 | |
778 | /* Verify that sockaddr looks sendable. Common verification has already |
779 | * been taken care of. |
780 | */ |
781 | static int sctp_inet_send_verify(struct sctp_sock *opt, union sctp_addr *addr) |
782 | { |
783 | return 1; |
784 | } |
785 | |
786 | /* Fill in Supported Address Type information for INIT and INIT-ACK |
787 | * chunks. Returns number of addresses supported. |
788 | */ |
789 | static int sctp_inet_supported_addrs(const struct sctp_sock *opt, |
790 | __u16 *types) |
791 | { |
792 | types[0] = SCTP_PARAM_IPV4_ADDRESS; |
793 | return 1; |
794 | } |
795 | |
796 | /* Wrapper routine that calls the ip transmit routine. */ |
797 | static inline int sctp_v4_xmit(struct sk_buff *skb, |
798 | struct sctp_transport *transport, int ipfragok) |
799 | { |
800 | SCTP_DEBUG_PRINTK("%s: skb:%p, len:%d, " |
801 | "src:%u.%u.%u.%u, dst:%u.%u.%u.%u\n", |
802 | __FUNCTION__, skb, skb->len, |
803 | NIPQUAD(((struct rtable *)skb->dst)->rt_src), |
804 | NIPQUAD(((struct rtable *)skb->dst)->rt_dst)); |
805 | |
806 | SCTP_INC_STATS(SCTP_MIB_OUTSCTPPACKS); |
807 | return ip_queue_xmit(skb, ipfragok); |
808 | } |
809 | |
810 | static struct sctp_af sctp_ipv4_specific; |
811 | |
812 | static struct sctp_pf sctp_pf_inet = { |
813 | .event_msgname = sctp_inet_event_msgname, |
814 | .skb_msgname = sctp_inet_skb_msgname, |
815 | .af_supported = sctp_inet_af_supported, |
816 | .cmp_addr = sctp_inet_cmp_addr, |
817 | .bind_verify = sctp_inet_bind_verify, |
818 | .send_verify = sctp_inet_send_verify, |
819 | .supported_addrs = sctp_inet_supported_addrs, |
820 | .create_accept_sk = sctp_v4_create_accept_sk, |
821 | .addr_v4map = sctp_v4_addr_v4map, |
822 | .af = &sctp_ipv4_specific, |
823 | }; |
824 | |
825 | /* Notifier for inetaddr addition/deletion events. */ |
826 | static struct notifier_block sctp_inetaddr_notifier = { |
827 | .notifier_call = sctp_inetaddr_event, |
828 | }; |
829 | |
830 | /* Socket operations. */ |
831 | static struct proto_ops inet_seqpacket_ops = { |
832 | .family = PF_INET, |
833 | .owner = THIS_MODULE, |
834 | .release = inet_release, /* Needs to be wrapped... */ |
835 | .bind = inet_bind, |
836 | .connect = inet_dgram_connect, |
837 | .socketpair = sock_no_socketpair, |
838 | .accept = inet_accept, |
839 | .getname = inet_getname, /* Semantics are different. */ |
840 | .poll = sctp_poll, |
841 | .ioctl = inet_ioctl, |
842 | .listen = sctp_inet_listen, |
843 | .shutdown = inet_shutdown, /* Looks harmless. */ |
844 | .setsockopt = sock_common_setsockopt, /* IP_SOL IP_OPTION is a problem. */ |
845 | .getsockopt = sock_common_getsockopt, |
846 | .sendmsg = inet_sendmsg, |
847 | .recvmsg = sock_common_recvmsg, |
848 | .mmap = sock_no_mmap, |
849 | .sendpage = sock_no_sendpage, |
850 | }; |
851 | |
852 | /* Registration with AF_INET family. */ |
853 | static struct inet_protosw sctp_seqpacket_protosw = { |
854 | .type = SOCK_SEQPACKET, |
855 | .protocol = IPPROTO_SCTP, |
856 | .prot = &sctp_prot, |
857 | .ops = &inet_seqpacket_ops, |
858 | .capability = -1, |
859 | .no_check = 0, |
860 | .flags = SCTP_PROTOSW_FLAG |
861 | }; |
862 | static struct inet_protosw sctp_stream_protosw = { |
863 | .type = SOCK_STREAM, |
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 | }; |
871 | |
872 | /* Register with IP layer. */ |
873 | static struct net_protocol sctp_protocol = { |
874 | .handler = sctp_rcv, |
875 | .err_handler = sctp_v4_err, |
876 | .no_policy = 1, |
877 | }; |
878 | |
879 | /* IPv4 address related functions. */ |
880 | static struct sctp_af sctp_ipv4_specific = { |
881 | .sctp_xmit = sctp_v4_xmit, |
882 | .setsockopt = ip_setsockopt, |
883 | .getsockopt = ip_getsockopt, |
884 | .get_dst = sctp_v4_get_dst, |
885 | .get_saddr = sctp_v4_get_saddr, |
886 | .copy_addrlist = sctp_v4_copy_addrlist, |
887 | .from_skb = sctp_v4_from_skb, |
888 | .from_sk = sctp_v4_from_sk, |
889 | .to_sk_saddr = sctp_v4_to_sk_saddr, |
890 | .to_sk_daddr = sctp_v4_to_sk_daddr, |
891 | .from_addr_param= sctp_v4_from_addr_param, |
892 | .to_addr_param = sctp_v4_to_addr_param, |
893 | .dst_saddr = sctp_v4_dst_saddr, |
894 | .cmp_addr = sctp_v4_cmp_addr, |
895 | .addr_valid = sctp_v4_addr_valid, |
896 | .inaddr_any = sctp_v4_inaddr_any, |
897 | .is_any = sctp_v4_is_any, |
898 | .available = sctp_v4_available, |
899 | .scope = sctp_v4_scope, |
900 | .skb_iif = sctp_v4_skb_iif, |
901 | .is_ce = sctp_v4_is_ce, |
902 | .seq_dump_addr = sctp_v4_seq_dump_addr, |
903 | .net_header_len = sizeof(struct iphdr), |
904 | .sockaddr_len = sizeof(struct sockaddr_in), |
905 | .sa_family = AF_INET, |
906 | }; |
907 | |
908 | struct sctp_pf *sctp_get_pf_specific(sa_family_t family) { |
909 | |
910 | switch (family) { |
911 | case PF_INET: |
912 | return sctp_pf_inet_specific; |
913 | case PF_INET6: |
914 | return sctp_pf_inet6_specific; |
915 | default: |
916 | return NULL; |
917 | } |
918 | } |
919 | |
920 | /* Register the PF specific function table. */ |
921 | int sctp_register_pf(struct sctp_pf *pf, sa_family_t family) |
922 | { |
923 | switch (family) { |
924 | case PF_INET: |
925 | if (sctp_pf_inet_specific) |
926 | return 0; |
927 | sctp_pf_inet_specific = pf; |
928 | break; |
929 | case PF_INET6: |
930 | if (sctp_pf_inet6_specific) |
931 | return 0; |
932 | sctp_pf_inet6_specific = pf; |
933 | break; |
934 | default: |
935 | return 0; |
936 | } |
937 | return 1; |
938 | } |
939 | |
940 | static int __init init_sctp_mibs(void) |
941 | { |
942 | sctp_statistics[0] = alloc_percpu(struct sctp_mib); |
943 | if (!sctp_statistics[0]) |
944 | return -ENOMEM; |
945 | sctp_statistics[1] = alloc_percpu(struct sctp_mib); |
946 | if (!sctp_statistics[1]) { |
947 | free_percpu(sctp_statistics[0]); |
948 | return -ENOMEM; |
949 | } |
950 | return 0; |
951 | |
952 | } |
953 | |
954 | static void cleanup_sctp_mibs(void) |
955 | { |
956 | free_percpu(sctp_statistics[0]); |
957 | free_percpu(sctp_statistics[1]); |
958 | } |
959 | |
960 | /* Initialize the universe into something sensible. */ |
961 | SCTP_STATIC __init int sctp_init(void) |
962 | { |
963 | int i; |
964 | int status = -EINVAL; |
965 | unsigned long goal; |
966 | int order; |
967 | |
968 | /* SCTP_DEBUG sanity check. */ |
969 | if (!sctp_sanity_check()) |
970 | goto out; |
971 | |
972 | status = proto_register(&sctp_prot, 1); |
973 | if (status) |
974 | goto out; |
975 | |
976 | /* Add SCTP to inet_protos hash table. */ |
977 | status = -EAGAIN; |
978 | if (inet_add_protocol(&sctp_protocol, IPPROTO_SCTP) < 0) |
979 | goto err_add_protocol; |
980 | |
981 | /* Add SCTP(TCP and UDP style) to inetsw linked list. */ |
982 | inet_register_protosw(&sctp_seqpacket_protosw); |
983 | inet_register_protosw(&sctp_stream_protosw); |
984 | |
985 | /* Allocate a cache pools. */ |
986 | status = -ENOBUFS; |
987 | sctp_bucket_cachep = kmem_cache_create("sctp_bind_bucket", |
988 | sizeof(struct sctp_bind_bucket), |
989 | 0, SLAB_HWCACHE_ALIGN, |
990 | NULL, NULL); |
991 | |
992 | if (!sctp_bucket_cachep) |
993 | goto err_bucket_cachep; |
994 | |
995 | sctp_chunk_cachep = kmem_cache_create("sctp_chunk", |
996 | sizeof(struct sctp_chunk), |
997 | 0, SLAB_HWCACHE_ALIGN, |
998 | NULL, NULL); |
999 | if (!sctp_chunk_cachep) |
1000 | goto err_chunk_cachep; |
1001 | |
1002 | /* Allocate and initialise sctp mibs. */ |
1003 | status = init_sctp_mibs(); |
1004 | if (status) |
1005 | goto err_init_mibs; |
1006 | |
1007 | /* Initialize proc fs directory. */ |
1008 | status = sctp_proc_init(); |
1009 | if (status) |
1010 | goto err_init_proc; |
1011 | |
1012 | /* Initialize object count debugging. */ |
1013 | sctp_dbg_objcnt_init(); |
1014 | |
1015 | /* Initialize the SCTP specific PF functions. */ |
1016 | sctp_register_pf(&sctp_pf_inet, PF_INET); |
1017 | /* |
1018 | * 14. Suggested SCTP Protocol Parameter Values |
1019 | */ |
1020 | /* The following protocol parameters are RECOMMENDED: */ |
1021 | /* RTO.Initial - 3 seconds */ |
1022 | sctp_rto_initial = SCTP_RTO_INITIAL; |
1023 | /* RTO.Min - 1 second */ |
1024 | sctp_rto_min = SCTP_RTO_MIN; |
1025 | /* RTO.Max - 60 seconds */ |
1026 | sctp_rto_max = SCTP_RTO_MAX; |
1027 | /* RTO.Alpha - 1/8 */ |
1028 | sctp_rto_alpha = SCTP_RTO_ALPHA; |
1029 | /* RTO.Beta - 1/4 */ |
1030 | sctp_rto_beta = SCTP_RTO_BETA; |
1031 | |
1032 | /* Valid.Cookie.Life - 60 seconds */ |
1033 | sctp_valid_cookie_life = 60 * HZ; |
1034 | |
1035 | /* Whether Cookie Preservative is enabled(1) or not(0) */ |
1036 | sctp_cookie_preserve_enable = 1; |
1037 | |
1038 | /* Max.Burst - 4 */ |
1039 | sctp_max_burst = SCTP_MAX_BURST; |
1040 | |
1041 | /* Association.Max.Retrans - 10 attempts |
1042 | * Path.Max.Retrans - 5 attempts (per destination address) |
1043 | * Max.Init.Retransmits - 8 attempts |
1044 | */ |
1045 | sctp_max_retrans_association = 10; |
1046 | sctp_max_retrans_path = 5; |
1047 | sctp_max_retrans_init = 8; |
1048 | |
1049 | /* Sendbuffer growth - do per-socket accounting */ |
1050 | sctp_sndbuf_policy = 0; |
1051 | |
1052 | /* HB.interval - 30 seconds */ |
1053 | sctp_hb_interval = 30 * HZ; |
1054 | |
1055 | /* Implementation specific variables. */ |
1056 | |
1057 | /* Initialize default stream count setup information. */ |
1058 | sctp_max_instreams = SCTP_DEFAULT_INSTREAMS; |
1059 | sctp_max_outstreams = SCTP_DEFAULT_OUTSTREAMS; |
1060 | |
1061 | /* Initialize handle used for association ids. */ |
1062 | idr_init(&sctp_assocs_id); |
1063 | |
1064 | /* Size and allocate the association hash table. |
1065 | * The methodology is similar to that of the tcp hash tables. |
1066 | */ |
1067 | if (num_physpages >= (128 * 1024)) |
1068 | goal = num_physpages >> (22 - PAGE_SHIFT); |
1069 | else |
1070 | goal = num_physpages >> (24 - PAGE_SHIFT); |
1071 | |
1072 | for (order = 0; (1UL << order) < goal; order++) |
1073 | ; |
1074 | |
1075 | do { |
1076 | sctp_assoc_hashsize = (1UL << order) * PAGE_SIZE / |
1077 | sizeof(struct sctp_hashbucket); |
1078 | if ((sctp_assoc_hashsize > (64 * 1024)) && order > 0) |
1079 | continue; |
1080 | sctp_assoc_hashtable = (struct sctp_hashbucket *) |
1081 | __get_free_pages(GFP_ATOMIC, order); |
1082 | } while (!sctp_assoc_hashtable && --order > 0); |
1083 | if (!sctp_assoc_hashtable) { |
1084 | printk(KERN_ERR "SCTP: Failed association hash alloc.\n"); |
1085 | status = -ENOMEM; |
1086 | goto err_ahash_alloc; |
1087 | } |
1088 | for (i = 0; i < sctp_assoc_hashsize; i++) { |
1089 | rwlock_init(&sctp_assoc_hashtable[i].lock); |
1090 | sctp_assoc_hashtable[i].chain = NULL; |
1091 | } |
1092 | |
1093 | /* Allocate and initialize the endpoint hash table. */ |
1094 | sctp_ep_hashsize = 64; |
1095 | sctp_ep_hashtable = (struct sctp_hashbucket *) |
1096 | kmalloc(64 * sizeof(struct sctp_hashbucket), GFP_KERNEL); |
1097 | if (!sctp_ep_hashtable) { |
1098 | printk(KERN_ERR "SCTP: Failed endpoint_hash alloc.\n"); |
1099 | status = -ENOMEM; |
1100 | goto err_ehash_alloc; |
1101 | } |
1102 | for (i = 0; i < sctp_ep_hashsize; i++) { |
1103 | rwlock_init(&sctp_ep_hashtable[i].lock); |
1104 | sctp_ep_hashtable[i].chain = NULL; |
1105 | } |
1106 | |
1107 | /* Allocate and initialize the SCTP port hash table. */ |
1108 | do { |
1109 | sctp_port_hashsize = (1UL << order) * PAGE_SIZE / |
1110 | sizeof(struct sctp_bind_hashbucket); |
1111 | if ((sctp_port_hashsize > (64 * 1024)) && order > 0) |
1112 | continue; |
1113 | sctp_port_hashtable = (struct sctp_bind_hashbucket *) |
1114 | __get_free_pages(GFP_ATOMIC, order); |
1115 | } while (!sctp_port_hashtable && --order > 0); |
1116 | if (!sctp_port_hashtable) { |
1117 | printk(KERN_ERR "SCTP: Failed bind hash alloc."); |
1118 | status = -ENOMEM; |
1119 | goto err_bhash_alloc; |
1120 | } |
1121 | for (i = 0; i < sctp_port_hashsize; i++) { |
1122 | spin_lock_init(&sctp_port_hashtable[i].lock); |
1123 | sctp_port_hashtable[i].chain = NULL; |
1124 | } |
1125 | |
1126 | spin_lock_init(&sctp_port_alloc_lock); |
1127 | sctp_port_rover = sysctl_local_port_range[0] - 1; |
1128 | |
1129 | printk(KERN_INFO "SCTP: Hash tables configured " |
1130 | "(established %d bind %d)\n", |
1131 | sctp_assoc_hashsize, sctp_port_hashsize); |
1132 | |
1133 | /* Disable ADDIP by default. */ |
1134 | sctp_addip_enable = 0; |
1135 | |
1136 | /* Enable PR-SCTP by default. */ |
1137 | sctp_prsctp_enable = 1; |
1138 | |
1139 | sctp_sysctl_register(); |
1140 | |
1141 | INIT_LIST_HEAD(&sctp_address_families); |
1142 | sctp_register_af(&sctp_ipv4_specific); |
1143 | |
1144 | status = sctp_v6_init(); |
1145 | if (status) |
1146 | goto err_v6_init; |
1147 | |
1148 | /* Initialize the control inode/socket for handling OOTB packets. */ |
1149 | if ((status = sctp_ctl_sock_init())) { |
1150 | printk (KERN_ERR |
1151 | "SCTP: Failed to initialize the SCTP control sock.\n"); |
1152 | goto err_ctl_sock_init; |
1153 | } |
1154 | |
1155 | /* Initialize the local address list. */ |
1156 | INIT_LIST_HEAD(&sctp_local_addr_list); |
1157 | spin_lock_init(&sctp_local_addr_lock); |
1158 | |
1159 | /* Register notifier for inet address additions/deletions. */ |
1160 | register_inetaddr_notifier(&sctp_inetaddr_notifier); |
1161 | |
1162 | sctp_get_local_addr_list(); |
1163 | |
1164 | __unsafe(THIS_MODULE); |
1165 | status = 0; |
1166 | out: |
1167 | return status; |
1168 | err_ctl_sock_init: |
1169 | sctp_v6_exit(); |
1170 | err_v6_init: |
1171 | sctp_sysctl_unregister(); |
1172 | list_del(&sctp_ipv4_specific.list); |
1173 | free_pages((unsigned long)sctp_port_hashtable, |
1174 | get_order(sctp_port_hashsize * |
1175 | sizeof(struct sctp_bind_hashbucket))); |
1176 | err_bhash_alloc: |
1177 | kfree(sctp_ep_hashtable); |
1178 | err_ehash_alloc: |
1179 | free_pages((unsigned long)sctp_assoc_hashtable, |
1180 | get_order(sctp_assoc_hashsize * |
1181 | sizeof(struct sctp_hashbucket))); |
1182 | err_ahash_alloc: |
1183 | sctp_dbg_objcnt_exit(); |
1184 | err_init_proc: |
1185 | sctp_proc_exit(); |
1186 | cleanup_sctp_mibs(); |
1187 | err_init_mibs: |
1188 | kmem_cache_destroy(sctp_chunk_cachep); |
1189 | err_chunk_cachep: |
1190 | kmem_cache_destroy(sctp_bucket_cachep); |
1191 | err_bucket_cachep: |
1192 | inet_del_protocol(&sctp_protocol, IPPROTO_SCTP); |
1193 | inet_unregister_protosw(&sctp_seqpacket_protosw); |
1194 | inet_unregister_protosw(&sctp_stream_protosw); |
1195 | err_add_protocol: |
1196 | proto_unregister(&sctp_prot); |
1197 | goto out; |
1198 | } |
1199 | |
1200 | /* Exit handler for the SCTP protocol. */ |
1201 | SCTP_STATIC __exit void sctp_exit(void) |
1202 | { |
1203 | /* BUG. This should probably do something useful like clean |
1204 | * up all the remaining associations and all that memory. |
1205 | */ |
1206 | |
1207 | /* Unregister notifier for inet address additions/deletions. */ |
1208 | unregister_inetaddr_notifier(&sctp_inetaddr_notifier); |
1209 | |
1210 | /* Free the local address list. */ |
1211 | sctp_free_local_addr_list(); |
1212 | |
1213 | /* Free the control endpoint. */ |
1214 | sock_release(sctp_ctl_socket); |
1215 | |
1216 | sctp_v6_exit(); |
1217 | sctp_sysctl_unregister(); |
1218 | list_del(&sctp_ipv4_specific.list); |
1219 | |
1220 | free_pages((unsigned long)sctp_assoc_hashtable, |
1221 | get_order(sctp_assoc_hashsize * |
1222 | sizeof(struct sctp_hashbucket))); |
1223 | kfree(sctp_ep_hashtable); |
1224 | free_pages((unsigned long)sctp_port_hashtable, |
1225 | get_order(sctp_port_hashsize * |
1226 | sizeof(struct sctp_bind_hashbucket))); |
1227 | |
1228 | kmem_cache_destroy(sctp_chunk_cachep); |
1229 | kmem_cache_destroy(sctp_bucket_cachep); |
1230 | |
1231 | sctp_dbg_objcnt_exit(); |
1232 | sctp_proc_exit(); |
1233 | cleanup_sctp_mibs(); |
1234 | |
1235 | inet_del_protocol(&sctp_protocol, IPPROTO_SCTP); |
1236 | inet_unregister_protosw(&sctp_seqpacket_protosw); |
1237 | inet_unregister_protosw(&sctp_stream_protosw); |
1238 | proto_unregister(&sctp_prot); |
1239 | } |
1240 | |
1241 | module_init(sctp_init); |
1242 | module_exit(sctp_exit); |
1243 | |
1244 | MODULE_AUTHOR("Linux Kernel SCTP developers <lksctp-developers@lists.sourceforge.net>"); |
1245 | MODULE_DESCRIPTION("Support for the SCTP protocol (RFC2960)"); |
1246 | MODULE_LICENSE("GPL"); |