Commit | Line | Data |
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60c778b2 | 1 | /* SCTP kernel implementation |
1da177e4 LT |
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 | * | |
60c778b2 | 9 | * This file is part of the SCTP kernel implementation |
1da177e4 LT |
10 | * |
11 | * Initialization/cleanup for SCTP protocol support. | |
12 | * | |
60c778b2 | 13 | * This SCTP implementation is free software; |
1da177e4 LT |
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 | * | |
60c778b2 | 19 | * This SCTP implementation is distributed in the hope that it |
1da177e4 LT |
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 | ||
145ce502 JP |
49 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
50 | ||
1da177e4 LT |
51 | #include <linux/module.h> |
52 | #include <linux/init.h> | |
53 | #include <linux/netdevice.h> | |
54 | #include <linux/inetdevice.h> | |
55 | #include <linux/seq_file.h> | |
4d93df0a | 56 | #include <linux/bootmem.h> |
845525a6 VY |
57 | #include <linux/highmem.h> |
58 | #include <linux/swap.h> | |
5a0e3ad6 | 59 | #include <linux/slab.h> |
457c4cbc | 60 | #include <net/net_namespace.h> |
1da177e4 LT |
61 | #include <net/protocol.h> |
62 | #include <net/ip.h> | |
63 | #include <net/ipv6.h> | |
14c85021 | 64 | #include <net/route.h> |
1da177e4 LT |
65 | #include <net/sctp/sctp.h> |
66 | #include <net/addrconf.h> | |
67 | #include <net/inet_common.h> | |
68 | #include <net/inet_ecn.h> | |
69 | ||
70 | /* Global data structures. */ | |
4cbf1cae | 71 | struct sctp_globals sctp_globals __read_mostly; |
ba89966c | 72 | DEFINE_SNMP_STAT(struct sctp_mib, sctp_statistics) __read_mostly; |
1da177e4 | 73 | |
c4e85f82 FW |
74 | #ifdef CONFIG_PROC_FS |
75 | struct proc_dir_entry *proc_net_sctp; | |
76 | #endif | |
77 | ||
1da177e4 LT |
78 | struct idr sctp_assocs_id; |
79 | DEFINE_SPINLOCK(sctp_assocs_id_lock); | |
80 | ||
81 | /* This is the global socket data structure used for responding to | |
82 | * the Out-of-the-blue (OOTB) packets. A control sock will be created | |
83 | * for this socket at the initialization time. | |
84 | */ | |
8258175c | 85 | static struct sock *sctp_ctl_sock; |
1da177e4 LT |
86 | |
87 | static struct sctp_pf *sctp_pf_inet6_specific; | |
88 | static struct sctp_pf *sctp_pf_inet_specific; | |
89 | static struct sctp_af *sctp_af_v4_specific; | |
90 | static struct sctp_af *sctp_af_v6_specific; | |
91 | ||
e18b890b CL |
92 | struct kmem_cache *sctp_chunk_cachep __read_mostly; |
93 | struct kmem_cache *sctp_bucket_cachep __read_mostly; | |
1da177e4 | 94 | |
8d987e5c | 95 | long sysctl_sctp_mem[3]; |
007e3936 VY |
96 | int sysctl_sctp_rmem[3]; |
97 | int sysctl_sctp_wmem[3]; | |
4d93df0a | 98 | |
1da177e4 LT |
99 | /* Return the address of the control sock. */ |
100 | struct sock *sctp_get_ctl_sock(void) | |
101 | { | |
8258175c | 102 | return sctp_ctl_sock; |
1da177e4 LT |
103 | } |
104 | ||
105 | /* Set up the proc fs entry for the SCTP protocol. */ | |
106 | static __init int sctp_proc_init(void) | |
107 | { | |
1748376b ED |
108 | if (percpu_counter_init(&sctp_sockets_allocated, 0)) |
109 | goto out_nomem; | |
c4e85f82 | 110 | #ifdef CONFIG_PROC_FS |
1da177e4 | 111 | if (!proc_net_sctp) { |
99b76233 AD |
112 | proc_net_sctp = proc_mkdir("sctp", init_net.proc_net); |
113 | if (!proc_net_sctp) | |
1748376b | 114 | goto out_free_percpu; |
1da177e4 LT |
115 | } |
116 | ||
117 | if (sctp_snmp_proc_init()) | |
80896a35 | 118 | goto out_snmp_proc_init; |
1da177e4 | 119 | if (sctp_eps_proc_init()) |
80896a35 | 120 | goto out_eps_proc_init; |
1da177e4 | 121 | if (sctp_assocs_proc_init()) |
80896a35 | 122 | goto out_assocs_proc_init; |
20c2c1fd | 123 | if (sctp_remaddr_proc_init()) |
caea902f | 124 | goto out_remaddr_proc_init; |
1da177e4 LT |
125 | |
126 | return 0; | |
127 | ||
caea902f | 128 | out_remaddr_proc_init: |
3d00fb9e | 129 | sctp_assocs_proc_exit(); |
80896a35 WY |
130 | out_assocs_proc_init: |
131 | sctp_eps_proc_exit(); | |
132 | out_eps_proc_init: | |
133 | sctp_snmp_proc_exit(); | |
134 | out_snmp_proc_init: | |
135 | if (proc_net_sctp) { | |
136 | proc_net_sctp = NULL; | |
137 | remove_proc_entry("sctp", init_net.proc_net); | |
138 | } | |
1748376b ED |
139 | out_free_percpu: |
140 | percpu_counter_destroy(&sctp_sockets_allocated); | |
c4e85f82 FW |
141 | #else |
142 | return 0; | |
143 | #endif /* CONFIG_PROC_FS */ | |
157653ce RD |
144 | |
145 | out_nomem: | |
146 | return -ENOMEM; | |
1da177e4 LT |
147 | } |
148 | ||
d808ad9a | 149 | /* Clean up the proc fs entry for the SCTP protocol. |
1da177e4 LT |
150 | * Note: Do not make this __exit as it is used in the init error |
151 | * path. | |
152 | */ | |
153 | static void sctp_proc_exit(void) | |
154 | { | |
c4e85f82 | 155 | #ifdef CONFIG_PROC_FS |
1da177e4 LT |
156 | sctp_snmp_proc_exit(); |
157 | sctp_eps_proc_exit(); | |
158 | sctp_assocs_proc_exit(); | |
20c2c1fd | 159 | sctp_remaddr_proc_exit(); |
1da177e4 LT |
160 | |
161 | if (proc_net_sctp) { | |
162 | proc_net_sctp = NULL; | |
457c4cbc | 163 | remove_proc_entry("sctp", init_net.proc_net); |
1da177e4 | 164 | } |
c4e85f82 | 165 | #endif |
418372b0 | 166 | percpu_counter_destroy(&sctp_sockets_allocated); |
1da177e4 LT |
167 | } |
168 | ||
169 | /* Private helper to extract ipv4 address and stash them in | |
170 | * the protocol structure. | |
171 | */ | |
172 | static void sctp_v4_copy_addrlist(struct list_head *addrlist, | |
173 | struct net_device *dev) | |
174 | { | |
175 | struct in_device *in_dev; | |
176 | struct in_ifaddr *ifa; | |
177 | struct sctp_sockaddr_entry *addr; | |
178 | ||
179 | rcu_read_lock(); | |
e5ed6399 | 180 | if ((in_dev = __in_dev_get_rcu(dev)) == NULL) { |
1da177e4 LT |
181 | rcu_read_unlock(); |
182 | return; | |
183 | } | |
184 | ||
185 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { | |
186 | /* Add the address to the local list. */ | |
187 | addr = t_new(struct sctp_sockaddr_entry, GFP_ATOMIC); | |
188 | if (addr) { | |
2a6fd78a AV |
189 | addr->a.v4.sin_family = AF_INET; |
190 | addr->a.v4.sin_port = 0; | |
191 | addr->a.v4.sin_addr.s_addr = ifa->ifa_local; | |
29303547 VY |
192 | addr->valid = 1; |
193 | INIT_LIST_HEAD(&addr->list); | |
1da177e4 LT |
194 | list_add_tail(&addr->list, addrlist); |
195 | } | |
196 | } | |
197 | ||
198 | rcu_read_unlock(); | |
199 | } | |
200 | ||
201 | /* Extract our IP addresses from the system and stash them in the | |
202 | * protocol structure. | |
203 | */ | |
29c7cf96 | 204 | static void sctp_get_local_addr_list(void) |
1da177e4 LT |
205 | { |
206 | struct net_device *dev; | |
207 | struct list_head *pos; | |
208 | struct sctp_af *af; | |
209 | ||
c6d14c84 ED |
210 | rcu_read_lock(); |
211 | for_each_netdev_rcu(&init_net, dev) { | |
1da177e4 LT |
212 | __list_for_each(pos, &sctp_address_families) { |
213 | af = list_entry(pos, struct sctp_af, list); | |
214 | af->copy_addrlist(&sctp_local_addr_list, dev); | |
215 | } | |
216 | } | |
c6d14c84 | 217 | rcu_read_unlock(); |
1da177e4 LT |
218 | } |
219 | ||
1da177e4 | 220 | /* Free the existing local addresses. */ |
29c7cf96 | 221 | static void sctp_free_local_addr_list(void) |
1da177e4 LT |
222 | { |
223 | struct sctp_sockaddr_entry *addr; | |
224 | struct list_head *pos, *temp; | |
225 | ||
226 | list_for_each_safe(pos, temp, &sctp_local_addr_list) { | |
227 | addr = list_entry(pos, struct sctp_sockaddr_entry, list); | |
228 | list_del(pos); | |
229 | kfree(addr); | |
230 | } | |
231 | } | |
232 | ||
1da177e4 LT |
233 | /* Copy the local addresses which are valid for 'scope' into 'bp'. */ |
234 | int sctp_copy_local_addr_list(struct sctp_bind_addr *bp, sctp_scope_t scope, | |
dd0fc66f | 235 | gfp_t gfp, int copy_flags) |
1da177e4 LT |
236 | { |
237 | struct sctp_sockaddr_entry *addr; | |
238 | int error = 0; | |
1da177e4 | 239 | |
29303547 VY |
240 | rcu_read_lock(); |
241 | list_for_each_entry_rcu(addr, &sctp_local_addr_list, list) { | |
242 | if (!addr->valid) | |
243 | continue; | |
6244be4e | 244 | if (sctp_in_scope(&addr->a, scope)) { |
1da177e4 LT |
245 | /* Now that the address is in scope, check to see if |
246 | * the address type is really supported by the local | |
247 | * sock as well as the remote peer. | |
248 | */ | |
6244be4e | 249 | if ((((AF_INET == addr->a.sa.sa_family) && |
1da177e4 | 250 | (copy_flags & SCTP_ADDR4_PEERSUPP))) || |
6244be4e | 251 | (((AF_INET6 == addr->a.sa.sa_family) && |
1da177e4 LT |
252 | (copy_flags & SCTP_ADDR6_ALLOWED) && |
253 | (copy_flags & SCTP_ADDR6_PEERSUPP)))) { | |
f57d96b2 VY |
254 | error = sctp_add_bind_addr(bp, &addr->a, |
255 | SCTP_ADDR_SRC, GFP_ATOMIC); | |
1da177e4 LT |
256 | if (error) |
257 | goto end_copy; | |
258 | } | |
259 | } | |
260 | } | |
261 | ||
262 | end_copy: | |
29303547 | 263 | rcu_read_unlock(); |
1da177e4 LT |
264 | return error; |
265 | } | |
266 | ||
267 | /* Initialize a sctp_addr from in incoming skb. */ | |
268 | static void sctp_v4_from_skb(union sctp_addr *addr, struct sk_buff *skb, | |
269 | int is_saddr) | |
270 | { | |
271 | void *from; | |
d55c41b1 | 272 | __be16 *port; |
1da177e4 LT |
273 | struct sctphdr *sh; |
274 | ||
275 | port = &addr->v4.sin_port; | |
276 | addr->v4.sin_family = AF_INET; | |
277 | ||
2c0fd387 | 278 | sh = sctp_hdr(skb); |
1da177e4 | 279 | if (is_saddr) { |
d55c41b1 | 280 | *port = sh->source; |
eddc9ec5 | 281 | from = &ip_hdr(skb)->saddr; |
1da177e4 | 282 | } else { |
d55c41b1 | 283 | *port = sh->dest; |
eddc9ec5 | 284 | from = &ip_hdr(skb)->daddr; |
1da177e4 LT |
285 | } |
286 | memcpy(&addr->v4.sin_addr.s_addr, from, sizeof(struct in_addr)); | |
287 | } | |
288 | ||
289 | /* Initialize an sctp_addr from a socket. */ | |
290 | static void sctp_v4_from_sk(union sctp_addr *addr, struct sock *sk) | |
291 | { | |
292 | addr->v4.sin_family = AF_INET; | |
7dcdbd95 | 293 | addr->v4.sin_port = 0; |
c720c7e8 | 294 | addr->v4.sin_addr.s_addr = inet_sk(sk)->inet_rcv_saddr; |
1da177e4 LT |
295 | } |
296 | ||
297 | /* Initialize sk->sk_rcv_saddr from sctp_addr. */ | |
298 | static void sctp_v4_to_sk_saddr(union sctp_addr *addr, struct sock *sk) | |
299 | { | |
c720c7e8 | 300 | inet_sk(sk)->inet_rcv_saddr = addr->v4.sin_addr.s_addr; |
1da177e4 LT |
301 | } |
302 | ||
303 | /* Initialize sk->sk_daddr from sctp_addr. */ | |
304 | static void sctp_v4_to_sk_daddr(union sctp_addr *addr, struct sock *sk) | |
305 | { | |
c720c7e8 | 306 | inet_sk(sk)->inet_daddr = addr->v4.sin_addr.s_addr; |
1da177e4 LT |
307 | } |
308 | ||
309 | /* Initialize a sctp_addr from an address parameter. */ | |
310 | static void sctp_v4_from_addr_param(union sctp_addr *addr, | |
311 | union sctp_addr_param *param, | |
dd86d136 | 312 | __be16 port, int iif) |
1da177e4 LT |
313 | { |
314 | addr->v4.sin_family = AF_INET; | |
315 | addr->v4.sin_port = port; | |
316 | addr->v4.sin_addr.s_addr = param->v4.addr.s_addr; | |
317 | } | |
318 | ||
319 | /* Initialize an address parameter from a sctp_addr and return the length | |
320 | * of the address parameter. | |
321 | */ | |
322 | static int sctp_v4_to_addr_param(const union sctp_addr *addr, | |
323 | union sctp_addr_param *param) | |
324 | { | |
325 | int length = sizeof(sctp_ipv4addr_param_t); | |
326 | ||
327 | param->v4.param_hdr.type = SCTP_PARAM_IPV4_ADDRESS; | |
dbc16db1 | 328 | param->v4.param_hdr.length = htons(length); |
d808ad9a | 329 | param->v4.addr.s_addr = addr->v4.sin_addr.s_addr; |
1da177e4 LT |
330 | |
331 | return length; | |
332 | } | |
333 | ||
334 | /* Initialize a sctp_addr from a dst_entry. */ | |
18a353f4 | 335 | static void sctp_v4_dst_saddr(union sctp_addr *saddr, struct flowi4 *fl4, |
854d43a4 | 336 | __be16 port) |
1da177e4 | 337 | { |
1da177e4 LT |
338 | saddr->v4.sin_family = AF_INET; |
339 | saddr->v4.sin_port = port; | |
18a353f4 | 340 | saddr->v4.sin_addr.s_addr = fl4->saddr; |
1da177e4 LT |
341 | } |
342 | ||
343 | /* Compare two addresses exactly. */ | |
344 | static int sctp_v4_cmp_addr(const union sctp_addr *addr1, | |
345 | const union sctp_addr *addr2) | |
346 | { | |
347 | if (addr1->sa.sa_family != addr2->sa.sa_family) | |
348 | return 0; | |
349 | if (addr1->v4.sin_port != addr2->v4.sin_port) | |
350 | return 0; | |
351 | if (addr1->v4.sin_addr.s_addr != addr2->v4.sin_addr.s_addr) | |
352 | return 0; | |
353 | ||
354 | return 1; | |
355 | } | |
356 | ||
357 | /* Initialize addr struct to INADDR_ANY. */ | |
6fbfa9f9 | 358 | static void sctp_v4_inaddr_any(union sctp_addr *addr, __be16 port) |
1da177e4 LT |
359 | { |
360 | addr->v4.sin_family = AF_INET; | |
e6f1cebf | 361 | addr->v4.sin_addr.s_addr = htonl(INADDR_ANY); |
1da177e4 LT |
362 | addr->v4.sin_port = port; |
363 | } | |
364 | ||
365 | /* Is this a wildcard address? */ | |
366 | static int sctp_v4_is_any(const union sctp_addr *addr) | |
367 | { | |
e6f1cebf | 368 | return htonl(INADDR_ANY) == addr->v4.sin_addr.s_addr; |
1da177e4 LT |
369 | } |
370 | ||
371 | /* This function checks if the address is a valid address to be used for | |
372 | * SCTP binding. | |
373 | * | |
374 | * Output: | |
375 | * Return 0 - If the address is a non-unicast or an illegal address. | |
376 | * Return 1 - If the address is a unicast. | |
377 | */ | |
5636bef7 VY |
378 | static int sctp_v4_addr_valid(union sctp_addr *addr, |
379 | struct sctp_sock *sp, | |
380 | const struct sk_buff *skb) | |
1da177e4 | 381 | { |
7dab83de VY |
382 | /* IPv4 addresses not allowed */ |
383 | if (sp && ipv6_only_sock(sctp_opt2sk(sp))) | |
384 | return 0; | |
385 | ||
1da177e4 | 386 | /* Is this a non-unicast address or a unusable SCTP address? */ |
b5cb2bbc | 387 | if (IS_IPV4_UNUSABLE_ADDRESS(addr->v4.sin_addr.s_addr)) |
1da177e4 LT |
388 | return 0; |
389 | ||
d808ad9a | 390 | /* Is this a broadcast address? */ |
511c3f92 | 391 | if (skb && skb_rtable(skb)->rt_flags & RTCF_BROADCAST) |
d808ad9a | 392 | return 0; |
5636bef7 | 393 | |
1da177e4 LT |
394 | return 1; |
395 | } | |
396 | ||
397 | /* Should this be available for binding? */ | |
398 | static int sctp_v4_available(union sctp_addr *addr, struct sctp_sock *sp) | |
399 | { | |
6b175b26 | 400 | int ret = inet_addr_type(&init_net, addr->v4.sin_addr.s_addr); |
1da177e4 | 401 | |
1da177e4 | 402 | |
e6f1cebf | 403 | if (addr->v4.sin_addr.s_addr != htonl(INADDR_ANY) && |
cdac4e07 NH |
404 | ret != RTN_LOCAL && |
405 | !sp->inet.freebind && | |
406 | !sysctl_ip_nonlocal_bind) | |
1da177e4 | 407 | return 0; |
cdac4e07 | 408 | |
7dab83de VY |
409 | if (ipv6_only_sock(sctp_opt2sk(sp))) |
410 | return 0; | |
411 | ||
1da177e4 LT |
412 | return 1; |
413 | } | |
414 | ||
415 | /* Checking the loopback, private and other address scopes as defined in | |
416 | * RFC 1918. The IPv4 scoping is based on the draft for SCTP IPv4 | |
417 | * scoping <draft-stewart-tsvwg-sctp-ipv4-00.txt>. | |
418 | * | |
419 | * Level 0 - unusable SCTP addresses | |
420 | * Level 1 - loopback address | |
421 | * Level 2 - link-local addresses | |
422 | * Level 3 - private addresses. | |
423 | * Level 4 - global addresses | |
424 | * For INIT and INIT-ACK address list, let L be the level of | |
425 | * of requested destination address, sender and receiver | |
426 | * SHOULD include all of its addresses with level greater | |
427 | * than or equal to L. | |
72388433 BD |
428 | * |
429 | * IPv4 scoping can be controlled through sysctl option | |
430 | * net.sctp.addr_scope_policy | |
1da177e4 LT |
431 | */ |
432 | static sctp_scope_t sctp_v4_scope(union sctp_addr *addr) | |
433 | { | |
434 | sctp_scope_t retval; | |
435 | ||
1da177e4 | 436 | /* Check for unusable SCTP addresses. */ |
b5cb2bbc | 437 | if (IS_IPV4_UNUSABLE_ADDRESS(addr->v4.sin_addr.s_addr)) { |
1da177e4 | 438 | retval = SCTP_SCOPE_UNUSABLE; |
b5cb2bbc | 439 | } else if (ipv4_is_loopback(addr->v4.sin_addr.s_addr)) { |
1da177e4 | 440 | retval = SCTP_SCOPE_LOOPBACK; |
b5cb2bbc | 441 | } else if (ipv4_is_linklocal_169(addr->v4.sin_addr.s_addr)) { |
1da177e4 | 442 | retval = SCTP_SCOPE_LINK; |
b5cb2bbc JP |
443 | } else if (ipv4_is_private_10(addr->v4.sin_addr.s_addr) || |
444 | ipv4_is_private_172(addr->v4.sin_addr.s_addr) || | |
445 | ipv4_is_private_192(addr->v4.sin_addr.s_addr)) { | |
1da177e4 LT |
446 | retval = SCTP_SCOPE_PRIVATE; |
447 | } else { | |
448 | retval = SCTP_SCOPE_GLOBAL; | |
449 | } | |
450 | ||
451 | return retval; | |
452 | } | |
453 | ||
454 | /* Returns a valid dst cache entry for the given source and destination ip | |
455 | * addresses. If an association is passed, trys to get a dst entry with a | |
456 | * source address that matches an address in the bind address list. | |
457 | */ | |
da0420be VY |
458 | static void sctp_v4_get_dst(struct sctp_transport *t, union sctp_addr *saddr, |
459 | struct flowi *fl, struct sock *sk) | |
1da177e4 | 460 | { |
da0420be | 461 | struct sctp_association *asoc = t->asoc; |
1da177e4 | 462 | struct rtable *rt; |
9914ae3c | 463 | struct flowi4 *fl4 = &fl->u.ip4; |
1da177e4 | 464 | struct sctp_bind_addr *bp; |
1da177e4 | 465 | struct sctp_sockaddr_entry *laddr; |
1da177e4 | 466 | struct dst_entry *dst = NULL; |
da0420be | 467 | union sctp_addr *daddr = &t->ipaddr; |
1da177e4 LT |
468 | union sctp_addr dst_saddr; |
469 | ||
9914ae3c VY |
470 | memset(fl4, 0x0, sizeof(struct flowi4)); |
471 | fl4->daddr = daddr->v4.sin_addr.s_addr; | |
472 | fl4->fl4_dport = daddr->v4.sin_port; | |
473 | fl4->flowi4_proto = IPPROTO_SCTP; | |
1da177e4 | 474 | if (asoc) { |
9914ae3c VY |
475 | fl4->flowi4_tos = RT_CONN_FLAGS(asoc->base.sk); |
476 | fl4->flowi4_oif = asoc->base.sk->sk_bound_dev_if; | |
477 | fl4->fl4_sport = htons(asoc->base.bind_addr.port); | |
1da177e4 | 478 | } |
6429d3dc | 479 | if (saddr) { |
9914ae3c VY |
480 | fl4->saddr = saddr->v4.sin_addr.s_addr; |
481 | fl4->fl4_sport = saddr->v4.sin_port; | |
6429d3dc | 482 | } |
1da177e4 | 483 | |
21454aaa | 484 | SCTP_DEBUG_PRINTK("%s: DST:%pI4, SRC:%pI4 - ", |
9914ae3c | 485 | __func__, &fl4->daddr, &fl4->saddr); |
1da177e4 | 486 | |
9914ae3c | 487 | rt = ip_route_output_key(&init_net, fl4); |
b23dd4fe | 488 | if (!IS_ERR(rt)) |
d8d1f30b | 489 | dst = &rt->dst; |
1da177e4 LT |
490 | |
491 | /* If there is no association or if a source address is passed, no | |
492 | * more validation is required. | |
493 | */ | |
494 | if (!asoc || saddr) | |
495 | goto out; | |
496 | ||
497 | bp = &asoc->base.bind_addr; | |
1da177e4 LT |
498 | |
499 | if (dst) { | |
500 | /* Walk through the bind address list and look for a bind | |
501 | * address that matches the source address of the returned dst. | |
502 | */ | |
18a353f4 | 503 | sctp_v4_dst_saddr(&dst_saddr, fl4, htons(bp->port)); |
559cf710 VY |
504 | rcu_read_lock(); |
505 | list_for_each_entry_rcu(laddr, &bp->address_list, list) { | |
8a07eb0a MH |
506 | if (!laddr->valid || (laddr->state == SCTP_ADDR_DEL) || |
507 | (laddr->state != SCTP_ADDR_SRC && | |
508 | !asoc->src_out_of_asoc_ok)) | |
dc022a98 | 509 | continue; |
854d43a4 | 510 | if (sctp_v4_cmp_addr(&dst_saddr, &laddr->a)) |
1da177e4 LT |
511 | goto out_unlock; |
512 | } | |
559cf710 | 513 | rcu_read_unlock(); |
1da177e4 LT |
514 | |
515 | /* None of the bound addresses match the source address of the | |
516 | * dst. So release it. | |
517 | */ | |
518 | dst_release(dst); | |
519 | dst = NULL; | |
520 | } | |
521 | ||
522 | /* Walk through the bind address list and try to get a dst that | |
523 | * matches a bind address as the source address. | |
524 | */ | |
559cf710 VY |
525 | rcu_read_lock(); |
526 | list_for_each_entry_rcu(laddr, &bp->address_list, list) { | |
527 | if (!laddr->valid) | |
528 | continue; | |
f57d96b2 | 529 | if ((laddr->state == SCTP_ADDR_SRC) && |
6244be4e | 530 | (AF_INET == laddr->a.sa.sa_family)) { |
9914ae3c VY |
531 | fl4->saddr = laddr->a.v4.sin_addr.s_addr; |
532 | fl4->fl4_sport = laddr->a.v4.sin_port; | |
533 | rt = ip_route_output_key(&init_net, fl4); | |
b23dd4fe | 534 | if (!IS_ERR(rt)) { |
d8d1f30b | 535 | dst = &rt->dst; |
1da177e4 LT |
536 | goto out_unlock; |
537 | } | |
538 | } | |
539 | } | |
540 | ||
541 | out_unlock: | |
559cf710 | 542 | rcu_read_unlock(); |
1da177e4 | 543 | out: |
da0420be | 544 | t->dst = dst; |
1da177e4 | 545 | if (dst) |
21454aaa | 546 | SCTP_DEBUG_PRINTK("rt_dst:%pI4, rt_src:%pI4\n", |
18a353f4 | 547 | &fl4->daddr, &fl4->saddr); |
1da177e4 LT |
548 | else |
549 | SCTP_DEBUG_PRINTK("NO ROUTE\n"); | |
1da177e4 LT |
550 | } |
551 | ||
552 | /* For v4, the source address is cached in the route entry(dst). So no need | |
553 | * to cache it separately and hence this is an empty routine. | |
554 | */ | |
e5117101 | 555 | static void sctp_v4_get_saddr(struct sctp_sock *sk, |
9914ae3c | 556 | struct sctp_transport *t, |
9914ae3c | 557 | struct flowi *fl) |
1da177e4 | 558 | { |
9914ae3c VY |
559 | union sctp_addr *saddr = &t->saddr; |
560 | struct rtable *rt = (struct rtable *)t->dst; | |
23ec47a0 | 561 | |
1da177e4 LT |
562 | if (rt) { |
563 | saddr->v4.sin_family = AF_INET; | |
902ebd3e | 564 | saddr->v4.sin_addr.s_addr = fl->u.ip4.saddr; |
1da177e4 LT |
565 | } |
566 | } | |
567 | ||
568 | /* What interface did this skb arrive on? */ | |
569 | static int sctp_v4_skb_iif(const struct sk_buff *skb) | |
570 | { | |
92101b3b | 571 | return inet_iif(skb); |
1da177e4 LT |
572 | } |
573 | ||
574 | /* Was this packet marked by Explicit Congestion Notification? */ | |
575 | static int sctp_v4_is_ce(const struct sk_buff *skb) | |
576 | { | |
eddc9ec5 | 577 | return INET_ECN_is_ce(ip_hdr(skb)->tos); |
1da177e4 LT |
578 | } |
579 | ||
580 | /* Create and initialize a new sk for the socket returned by accept(). */ | |
581 | static struct sock *sctp_v4_create_accept_sk(struct sock *sk, | |
582 | struct sctp_association *asoc) | |
583 | { | |
3b1e0a65 | 584 | struct sock *newsk = sk_alloc(sock_net(sk), PF_INET, GFP_KERNEL, |
6257ff21 | 585 | sk->sk_prot); |
914e1c8b | 586 | struct inet_sock *newinet; |
1da177e4 LT |
587 | |
588 | if (!newsk) | |
589 | goto out; | |
590 | ||
591 | sock_init_data(NULL, newsk); | |
592 | ||
914e1c8b | 593 | sctp_copy_sock(newsk, sk, asoc); |
1da177e4 LT |
594 | sock_reset_flag(newsk, SOCK_ZAPPED); |
595 | ||
596 | newinet = inet_sk(newsk); | |
597 | ||
c720c7e8 | 598 | newinet->inet_daddr = asoc->peer.primary_addr.v4.sin_addr.s_addr; |
1da177e4 | 599 | |
e6848976 | 600 | sk_refcnt_debug_inc(newsk); |
1da177e4 LT |
601 | |
602 | if (newsk->sk_prot->init(newsk)) { | |
603 | sk_common_release(newsk); | |
604 | newsk = NULL; | |
605 | } | |
606 | ||
607 | out: | |
608 | return newsk; | |
609 | } | |
610 | ||
611 | /* Map address, empty for v4 family */ | |
612 | static void sctp_v4_addr_v4map(struct sctp_sock *sp, union sctp_addr *addr) | |
613 | { | |
614 | /* Empty */ | |
615 | } | |
616 | ||
617 | /* Dump the v4 addr to the seq file. */ | |
618 | static void sctp_v4_seq_dump_addr(struct seq_file *seq, union sctp_addr *addr) | |
619 | { | |
21454aaa | 620 | seq_printf(seq, "%pI4 ", &addr->v4.sin_addr); |
1da177e4 LT |
621 | } |
622 | ||
b9031d9d VY |
623 | static void sctp_v4_ecn_capable(struct sock *sk) |
624 | { | |
625 | INET_ECN_xmit(sk); | |
626 | } | |
627 | ||
9f7d653b MH |
628 | void sctp_addr_wq_timeout_handler(unsigned long arg) |
629 | { | |
630 | struct sctp_sockaddr_entry *addrw, *temp; | |
631 | struct sctp_sock *sp; | |
632 | ||
633 | spin_lock_bh(&sctp_addr_wq_lock); | |
634 | ||
635 | list_for_each_entry_safe(addrw, temp, &sctp_addr_waitq, list) { | |
636 | SCTP_DEBUG_PRINTK_IPADDR("sctp_addrwq_timo_handler: the first ent in wq %p is ", | |
637 | " for cmd %d at entry %p\n", &sctp_addr_waitq, &addrw->a, addrw->state, | |
638 | addrw); | |
639 | ||
dfd56b8b | 640 | #if IS_ENABLED(CONFIG_IPV6) |
9f7d653b MH |
641 | /* Now we send an ASCONF for each association */ |
642 | /* Note. we currently don't handle link local IPv6 addressees */ | |
643 | if (addrw->a.sa.sa_family == AF_INET6) { | |
644 | struct in6_addr *in6; | |
645 | ||
646 | if (ipv6_addr_type(&addrw->a.v6.sin6_addr) & | |
647 | IPV6_ADDR_LINKLOCAL) | |
648 | goto free_next; | |
649 | ||
650 | in6 = (struct in6_addr *)&addrw->a.v6.sin6_addr; | |
651 | if (ipv6_chk_addr(&init_net, in6, NULL, 0) == 0 && | |
652 | addrw->state == SCTP_ADDR_NEW) { | |
653 | unsigned long timeo_val; | |
654 | ||
655 | SCTP_DEBUG_PRINTK("sctp_timo_handler: this is on DAD, trying %d sec later\n", | |
656 | SCTP_ADDRESS_TICK_DELAY); | |
657 | timeo_val = jiffies; | |
658 | timeo_val += msecs_to_jiffies(SCTP_ADDRESS_TICK_DELAY); | |
659 | mod_timer(&sctp_addr_wq_timer, timeo_val); | |
660 | break; | |
661 | } | |
662 | } | |
5d0c90cf | 663 | #endif |
9f7d653b MH |
664 | list_for_each_entry(sp, &sctp_auto_asconf_splist, auto_asconf_list) { |
665 | struct sock *sk; | |
666 | ||
667 | sk = sctp_opt2sk(sp); | |
668 | /* ignore bound-specific endpoints */ | |
669 | if (!sctp_is_ep_boundall(sk)) | |
670 | continue; | |
671 | sctp_bh_lock_sock(sk); | |
672 | if (sctp_asconf_mgmt(sp, addrw) < 0) | |
673 | SCTP_DEBUG_PRINTK("sctp_addrwq_timo_handler: sctp_asconf_mgmt failed\n"); | |
674 | sctp_bh_unlock_sock(sk); | |
675 | } | |
39d84a58 | 676 | #if IS_ENABLED(CONFIG_IPV6) |
9f7d653b | 677 | free_next: |
39d84a58 | 678 | #endif |
9f7d653b MH |
679 | list_del(&addrw->list); |
680 | kfree(addrw); | |
681 | } | |
682 | spin_unlock_bh(&sctp_addr_wq_lock); | |
683 | } | |
684 | ||
685 | static void sctp_free_addr_wq(void) | |
686 | { | |
687 | struct sctp_sockaddr_entry *addrw; | |
688 | struct sctp_sockaddr_entry *temp; | |
689 | ||
690 | spin_lock_bh(&sctp_addr_wq_lock); | |
691 | del_timer(&sctp_addr_wq_timer); | |
692 | list_for_each_entry_safe(addrw, temp, &sctp_addr_waitq, list) { | |
693 | list_del(&addrw->list); | |
694 | kfree(addrw); | |
695 | } | |
696 | spin_unlock_bh(&sctp_addr_wq_lock); | |
697 | } | |
698 | ||
699 | /* lookup the entry for the same address in the addr_waitq | |
700 | * sctp_addr_wq MUST be locked | |
701 | */ | |
702 | static struct sctp_sockaddr_entry *sctp_addr_wq_lookup(struct sctp_sockaddr_entry *addr) | |
703 | { | |
704 | struct sctp_sockaddr_entry *addrw; | |
705 | ||
706 | list_for_each_entry(addrw, &sctp_addr_waitq, list) { | |
707 | if (addrw->a.sa.sa_family != addr->a.sa.sa_family) | |
708 | continue; | |
709 | if (addrw->a.sa.sa_family == AF_INET) { | |
710 | if (addrw->a.v4.sin_addr.s_addr == | |
711 | addr->a.v4.sin_addr.s_addr) | |
712 | return addrw; | |
713 | } else if (addrw->a.sa.sa_family == AF_INET6) { | |
714 | if (ipv6_addr_equal(&addrw->a.v6.sin6_addr, | |
715 | &addr->a.v6.sin6_addr)) | |
716 | return addrw; | |
717 | } | |
718 | } | |
719 | return NULL; | |
720 | } | |
721 | ||
722 | void sctp_addr_wq_mgmt(struct sctp_sockaddr_entry *addr, int cmd) | |
723 | { | |
724 | struct sctp_sockaddr_entry *addrw; | |
725 | unsigned long timeo_val; | |
726 | ||
727 | /* first, we check if an opposite message already exist in the queue. | |
728 | * If we found such message, it is removed. | |
729 | * This operation is a bit stupid, but the DHCP client attaches the | |
730 | * new address after a couple of addition and deletion of that address | |
731 | */ | |
732 | ||
733 | spin_lock_bh(&sctp_addr_wq_lock); | |
734 | /* Offsets existing events in addr_wq */ | |
735 | addrw = sctp_addr_wq_lookup(addr); | |
736 | if (addrw) { | |
737 | if (addrw->state != cmd) { | |
738 | SCTP_DEBUG_PRINTK_IPADDR("sctp_addr_wq_mgmt offsets existing entry for %d ", | |
739 | " in wq %p\n", addrw->state, &addrw->a, | |
740 | &sctp_addr_waitq); | |
741 | list_del(&addrw->list); | |
742 | kfree(addrw); | |
743 | } | |
744 | spin_unlock_bh(&sctp_addr_wq_lock); | |
745 | return; | |
746 | } | |
747 | ||
748 | /* OK, we have to add the new address to the wait queue */ | |
749 | addrw = kmemdup(addr, sizeof(struct sctp_sockaddr_entry), GFP_ATOMIC); | |
750 | if (addrw == NULL) { | |
751 | spin_unlock_bh(&sctp_addr_wq_lock); | |
752 | return; | |
753 | } | |
754 | addrw->state = cmd; | |
755 | list_add_tail(&addrw->list, &sctp_addr_waitq); | |
756 | SCTP_DEBUG_PRINTK_IPADDR("sctp_addr_wq_mgmt add new entry for cmd:%d ", | |
757 | " in wq %p\n", addrw->state, &addrw->a, &sctp_addr_waitq); | |
758 | ||
759 | if (!timer_pending(&sctp_addr_wq_timer)) { | |
760 | timeo_val = jiffies; | |
761 | timeo_val += msecs_to_jiffies(SCTP_ADDRESS_TICK_DELAY); | |
762 | mod_timer(&sctp_addr_wq_timer, timeo_val); | |
763 | } | |
764 | spin_unlock_bh(&sctp_addr_wq_lock); | |
765 | } | |
766 | ||
29303547 VY |
767 | /* Event handler for inet address addition/deletion events. |
768 | * The sctp_local_addr_list needs to be protocted by a spin lock since | |
769 | * multiple notifiers (say IPv4 and IPv6) may be running at the same | |
770 | * time and thus corrupt the list. | |
771 | * The reader side is protected with RCU. | |
772 | */ | |
24123186 AB |
773 | static int sctp_inetaddr_event(struct notifier_block *this, unsigned long ev, |
774 | void *ptr) | |
1da177e4 | 775 | { |
29c7cf96 | 776 | struct in_ifaddr *ifa = (struct in_ifaddr *)ptr; |
29303547 VY |
777 | struct sctp_sockaddr_entry *addr = NULL; |
778 | struct sctp_sockaddr_entry *temp; | |
22626216 | 779 | int found = 0; |
1da177e4 | 780 | |
721499e8 | 781 | if (!net_eq(dev_net(ifa->ifa_dev->dev), &init_net)) |
6133fb1a DL |
782 | return NOTIFY_DONE; |
783 | ||
29c7cf96 SS |
784 | switch (ev) { |
785 | case NETDEV_UP: | |
786 | addr = kmalloc(sizeof(struct sctp_sockaddr_entry), GFP_ATOMIC); | |
787 | if (addr) { | |
788 | addr->a.v4.sin_family = AF_INET; | |
789 | addr->a.v4.sin_port = 0; | |
790 | addr->a.v4.sin_addr.s_addr = ifa->ifa_local; | |
29303547 VY |
791 | addr->valid = 1; |
792 | spin_lock_bh(&sctp_local_addr_lock); | |
793 | list_add_tail_rcu(&addr->list, &sctp_local_addr_list); | |
9f7d653b | 794 | sctp_addr_wq_mgmt(addr, SCTP_ADDR_NEW); |
29303547 | 795 | spin_unlock_bh(&sctp_local_addr_lock); |
29c7cf96 SS |
796 | } |
797 | break; | |
798 | case NETDEV_DOWN: | |
29303547 VY |
799 | spin_lock_bh(&sctp_local_addr_lock); |
800 | list_for_each_entry_safe(addr, temp, | |
801 | &sctp_local_addr_list, list) { | |
a40a7d15 PE |
802 | if (addr->a.sa.sa_family == AF_INET && |
803 | addr->a.v4.sin_addr.s_addr == | |
804 | ifa->ifa_local) { | |
9f7d653b | 805 | sctp_addr_wq_mgmt(addr, SCTP_ADDR_DEL); |
22626216 | 806 | found = 1; |
29303547 VY |
807 | addr->valid = 0; |
808 | list_del_rcu(&addr->list); | |
29c7cf96 SS |
809 | break; |
810 | } | |
811 | } | |
29303547 | 812 | spin_unlock_bh(&sctp_local_addr_lock); |
22626216 | 813 | if (found) |
1231f0ba | 814 | kfree_rcu(addr, rcu); |
29c7cf96 SS |
815 | break; |
816 | } | |
1da177e4 LT |
817 | |
818 | return NOTIFY_DONE; | |
819 | } | |
820 | ||
821 | /* | |
822 | * Initialize the control inode/socket with a control endpoint data | |
823 | * structure. This endpoint is reserved exclusively for the OOTB processing. | |
824 | */ | |
825 | static int sctp_ctl_sock_init(void) | |
826 | { | |
827 | int err; | |
fb13d9f9 | 828 | sa_family_t family = PF_INET; |
1da177e4 LT |
829 | |
830 | if (sctp_get_pf_specific(PF_INET6)) | |
831 | family = PF_INET6; | |
1da177e4 | 832 | |
eee4fe4d | 833 | err = inet_ctl_sock_create(&sctp_ctl_sock, family, |
5677242f | 834 | SOCK_SEQPACKET, IPPROTO_SCTP, &init_net); |
fb13d9f9 BH |
835 | |
836 | /* If IPv6 socket could not be created, try the IPv4 socket */ | |
837 | if (err < 0 && family == PF_INET6) | |
838 | err = inet_ctl_sock_create(&sctp_ctl_sock, AF_INET, | |
839 | SOCK_SEQPACKET, IPPROTO_SCTP, | |
840 | &init_net); | |
841 | ||
1da177e4 | 842 | if (err < 0) { |
145ce502 | 843 | pr_err("Failed to create the SCTP control socket\n"); |
1da177e4 LT |
844 | return err; |
845 | } | |
1da177e4 LT |
846 | return 0; |
847 | } | |
848 | ||
849 | /* Register address family specific functions. */ | |
850 | int sctp_register_af(struct sctp_af *af) | |
851 | { | |
852 | switch (af->sa_family) { | |
853 | case AF_INET: | |
854 | if (sctp_af_v4_specific) | |
855 | return 0; | |
856 | sctp_af_v4_specific = af; | |
857 | break; | |
858 | case AF_INET6: | |
859 | if (sctp_af_v6_specific) | |
860 | return 0; | |
861 | sctp_af_v6_specific = af; | |
862 | break; | |
863 | default: | |
864 | return 0; | |
865 | } | |
866 | ||
867 | INIT_LIST_HEAD(&af->list); | |
868 | list_add_tail(&af->list, &sctp_address_families); | |
869 | return 1; | |
870 | } | |
871 | ||
872 | /* Get the table of functions for manipulating a particular address | |
873 | * family. | |
874 | */ | |
875 | struct sctp_af *sctp_get_af_specific(sa_family_t family) | |
876 | { | |
877 | switch (family) { | |
878 | case AF_INET: | |
879 | return sctp_af_v4_specific; | |
880 | case AF_INET6: | |
881 | return sctp_af_v6_specific; | |
882 | default: | |
883 | return NULL; | |
884 | } | |
885 | } | |
886 | ||
887 | /* Common code to initialize a AF_INET msg_name. */ | |
888 | static void sctp_inet_msgname(char *msgname, int *addr_len) | |
889 | { | |
890 | struct sockaddr_in *sin; | |
891 | ||
892 | sin = (struct sockaddr_in *)msgname; | |
893 | *addr_len = sizeof(struct sockaddr_in); | |
894 | sin->sin_family = AF_INET; | |
895 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | |
896 | } | |
897 | ||
898 | /* Copy the primary address of the peer primary address as the msg_name. */ | |
899 | static void sctp_inet_event_msgname(struct sctp_ulpevent *event, char *msgname, | |
900 | int *addr_len) | |
901 | { | |
902 | struct sockaddr_in *sin, *sinfrom; | |
903 | ||
904 | if (msgname) { | |
905 | struct sctp_association *asoc; | |
906 | ||
907 | asoc = event->asoc; | |
908 | sctp_inet_msgname(msgname, addr_len); | |
909 | sin = (struct sockaddr_in *)msgname; | |
910 | sinfrom = &asoc->peer.primary_addr.v4; | |
911 | sin->sin_port = htons(asoc->peer.port); | |
912 | sin->sin_addr.s_addr = sinfrom->sin_addr.s_addr; | |
913 | } | |
914 | } | |
915 | ||
916 | /* Initialize and copy out a msgname from an inbound skb. */ | |
917 | static void sctp_inet_skb_msgname(struct sk_buff *skb, char *msgname, int *len) | |
918 | { | |
1da177e4 | 919 | if (msgname) { |
2c0fd387 ACM |
920 | struct sctphdr *sh = sctp_hdr(skb); |
921 | struct sockaddr_in *sin = (struct sockaddr_in *)msgname; | |
922 | ||
1da177e4 | 923 | sctp_inet_msgname(msgname, len); |
1da177e4 | 924 | sin->sin_port = sh->source; |
eddc9ec5 | 925 | sin->sin_addr.s_addr = ip_hdr(skb)->saddr; |
1da177e4 LT |
926 | } |
927 | } | |
928 | ||
929 | /* Do we support this AF? */ | |
930 | static int sctp_inet_af_supported(sa_family_t family, struct sctp_sock *sp) | |
931 | { | |
932 | /* PF_INET only supports AF_INET addresses. */ | |
a02cec21 | 933 | return AF_INET == family; |
1da177e4 LT |
934 | } |
935 | ||
936 | /* Address matching with wildcards allowed. */ | |
937 | static int sctp_inet_cmp_addr(const union sctp_addr *addr1, | |
938 | const union sctp_addr *addr2, | |
939 | struct sctp_sock *opt) | |
940 | { | |
941 | /* PF_INET only supports AF_INET addresses. */ | |
942 | if (addr1->sa.sa_family != addr2->sa.sa_family) | |
943 | return 0; | |
e6f1cebf AV |
944 | if (htonl(INADDR_ANY) == addr1->v4.sin_addr.s_addr || |
945 | htonl(INADDR_ANY) == addr2->v4.sin_addr.s_addr) | |
1da177e4 LT |
946 | return 1; |
947 | if (addr1->v4.sin_addr.s_addr == addr2->v4.sin_addr.s_addr) | |
948 | return 1; | |
949 | ||
950 | return 0; | |
951 | } | |
952 | ||
953 | /* Verify that provided sockaddr looks bindable. Common verification has | |
954 | * already been taken care of. | |
955 | */ | |
956 | static int sctp_inet_bind_verify(struct sctp_sock *opt, union sctp_addr *addr) | |
957 | { | |
958 | return sctp_v4_available(addr, opt); | |
959 | } | |
960 | ||
961 | /* Verify that sockaddr looks sendable. Common verification has already | |
962 | * been taken care of. | |
963 | */ | |
964 | static int sctp_inet_send_verify(struct sctp_sock *opt, union sctp_addr *addr) | |
965 | { | |
966 | return 1; | |
967 | } | |
968 | ||
969 | /* Fill in Supported Address Type information for INIT and INIT-ACK | |
970 | * chunks. Returns number of addresses supported. | |
971 | */ | |
972 | static int sctp_inet_supported_addrs(const struct sctp_sock *opt, | |
3dbe8656 | 973 | __be16 *types) |
1da177e4 LT |
974 | { |
975 | types[0] = SCTP_PARAM_IPV4_ADDRESS; | |
976 | return 1; | |
977 | } | |
978 | ||
979 | /* Wrapper routine that calls the ip transmit routine. */ | |
980 | static inline int sctp_v4_xmit(struct sk_buff *skb, | |
f880374c | 981 | struct sctp_transport *transport) |
1da177e4 | 982 | { |
f880374c HX |
983 | struct inet_sock *inet = inet_sk(skb->sk); |
984 | ||
21454aaa | 985 | SCTP_DEBUG_PRINTK("%s: skb:%p, len:%d, src:%pI4, dst:%pI4\n", |
0dc47877 | 986 | __func__, skb, skb->len, |
7ef73bca DM |
987 | &transport->fl.u.ip4.saddr, |
988 | &transport->fl.u.ip4.daddr); | |
1da177e4 | 989 | |
f880374c HX |
990 | inet->pmtudisc = transport->param_flags & SPP_PMTUD_ENABLE ? |
991 | IP_PMTUDISC_DO : IP_PMTUDISC_DONT; | |
992 | ||
1da177e4 | 993 | SCTP_INC_STATS(SCTP_MIB_OUTSCTPPACKS); |
d9d8da80 | 994 | return ip_queue_xmit(skb, &transport->fl); |
1da177e4 LT |
995 | } |
996 | ||
15efbe76 | 997 | static struct sctp_af sctp_af_inet; |
1da177e4 LT |
998 | |
999 | static struct sctp_pf sctp_pf_inet = { | |
1000 | .event_msgname = sctp_inet_event_msgname, | |
1001 | .skb_msgname = sctp_inet_skb_msgname, | |
1002 | .af_supported = sctp_inet_af_supported, | |
1003 | .cmp_addr = sctp_inet_cmp_addr, | |
1004 | .bind_verify = sctp_inet_bind_verify, | |
1005 | .send_verify = sctp_inet_send_verify, | |
1006 | .supported_addrs = sctp_inet_supported_addrs, | |
1007 | .create_accept_sk = sctp_v4_create_accept_sk, | |
1008 | .addr_v4map = sctp_v4_addr_v4map, | |
15efbe76 | 1009 | .af = &sctp_af_inet |
1da177e4 LT |
1010 | }; |
1011 | ||
1012 | /* Notifier for inetaddr addition/deletion events. */ | |
1013 | static struct notifier_block sctp_inetaddr_notifier = { | |
1014 | .notifier_call = sctp_inetaddr_event, | |
1015 | }; | |
1016 | ||
1017 | /* Socket operations. */ | |
90ddc4f0 | 1018 | static const struct proto_ops inet_seqpacket_ops = { |
543d9cfe ACM |
1019 | .family = PF_INET, |
1020 | .owner = THIS_MODULE, | |
1021 | .release = inet_release, /* Needs to be wrapped... */ | |
1022 | .bind = inet_bind, | |
1023 | .connect = inet_dgram_connect, | |
1024 | .socketpair = sock_no_socketpair, | |
1025 | .accept = inet_accept, | |
1026 | .getname = inet_getname, /* Semantics are different. */ | |
1027 | .poll = sctp_poll, | |
1028 | .ioctl = inet_ioctl, | |
1029 | .listen = sctp_inet_listen, | |
1030 | .shutdown = inet_shutdown, /* Looks harmless. */ | |
1031 | .setsockopt = sock_common_setsockopt, /* IP_SOL IP_OPTION is a problem */ | |
1032 | .getsockopt = sock_common_getsockopt, | |
1033 | .sendmsg = inet_sendmsg, | |
1034 | .recvmsg = sock_common_recvmsg, | |
1035 | .mmap = sock_no_mmap, | |
1036 | .sendpage = sock_no_sendpage, | |
3fdadf7d | 1037 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
1038 | .compat_setsockopt = compat_sock_common_setsockopt, |
1039 | .compat_getsockopt = compat_sock_common_getsockopt, | |
3fdadf7d | 1040 | #endif |
1da177e4 LT |
1041 | }; |
1042 | ||
1043 | /* Registration with AF_INET family. */ | |
1044 | static struct inet_protosw sctp_seqpacket_protosw = { | |
1045 | .type = SOCK_SEQPACKET, | |
1046 | .protocol = IPPROTO_SCTP, | |
1047 | .prot = &sctp_prot, | |
1048 | .ops = &inet_seqpacket_ops, | |
1da177e4 LT |
1049 | .no_check = 0, |
1050 | .flags = SCTP_PROTOSW_FLAG | |
1051 | }; | |
1052 | static struct inet_protosw sctp_stream_protosw = { | |
1053 | .type = SOCK_STREAM, | |
1054 | .protocol = IPPROTO_SCTP, | |
1055 | .prot = &sctp_prot, | |
1056 | .ops = &inet_seqpacket_ops, | |
1da177e4 LT |
1057 | .no_check = 0, |
1058 | .flags = SCTP_PROTOSW_FLAG | |
1059 | }; | |
1060 | ||
1061 | /* Register with IP layer. */ | |
32613090 | 1062 | static const struct net_protocol sctp_protocol = { |
1da177e4 LT |
1063 | .handler = sctp_rcv, |
1064 | .err_handler = sctp_v4_err, | |
1065 | .no_policy = 1, | |
1066 | }; | |
1067 | ||
1068 | /* IPv4 address related functions. */ | |
15efbe76 | 1069 | static struct sctp_af sctp_af_inet = { |
543d9cfe ACM |
1070 | .sa_family = AF_INET, |
1071 | .sctp_xmit = sctp_v4_xmit, | |
1072 | .setsockopt = ip_setsockopt, | |
1073 | .getsockopt = ip_getsockopt, | |
1074 | .get_dst = sctp_v4_get_dst, | |
1075 | .get_saddr = sctp_v4_get_saddr, | |
1076 | .copy_addrlist = sctp_v4_copy_addrlist, | |
1077 | .from_skb = sctp_v4_from_skb, | |
1078 | .from_sk = sctp_v4_from_sk, | |
1079 | .to_sk_saddr = sctp_v4_to_sk_saddr, | |
1080 | .to_sk_daddr = sctp_v4_to_sk_daddr, | |
1081 | .from_addr_param = sctp_v4_from_addr_param, | |
1082 | .to_addr_param = sctp_v4_to_addr_param, | |
543d9cfe ACM |
1083 | .cmp_addr = sctp_v4_cmp_addr, |
1084 | .addr_valid = sctp_v4_addr_valid, | |
1085 | .inaddr_any = sctp_v4_inaddr_any, | |
1086 | .is_any = sctp_v4_is_any, | |
1087 | .available = sctp_v4_available, | |
1088 | .scope = sctp_v4_scope, | |
1089 | .skb_iif = sctp_v4_skb_iif, | |
1090 | .is_ce = sctp_v4_is_ce, | |
1091 | .seq_dump_addr = sctp_v4_seq_dump_addr, | |
b9031d9d | 1092 | .ecn_capable = sctp_v4_ecn_capable, |
543d9cfe ACM |
1093 | .net_header_len = sizeof(struct iphdr), |
1094 | .sockaddr_len = sizeof(struct sockaddr_in), | |
3fdadf7d | 1095 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
1096 | .compat_setsockopt = compat_ip_setsockopt, |
1097 | .compat_getsockopt = compat_ip_getsockopt, | |
3fdadf7d | 1098 | #endif |
1da177e4 LT |
1099 | }; |
1100 | ||
1101 | struct sctp_pf *sctp_get_pf_specific(sa_family_t family) { | |
1102 | ||
1103 | switch (family) { | |
1104 | case PF_INET: | |
1105 | return sctp_pf_inet_specific; | |
1106 | case PF_INET6: | |
1107 | return sctp_pf_inet6_specific; | |
1108 | default: | |
1109 | return NULL; | |
1110 | } | |
1111 | } | |
1112 | ||
1113 | /* Register the PF specific function table. */ | |
1114 | int sctp_register_pf(struct sctp_pf *pf, sa_family_t family) | |
1115 | { | |
1116 | switch (family) { | |
1117 | case PF_INET: | |
1118 | if (sctp_pf_inet_specific) | |
1119 | return 0; | |
1120 | sctp_pf_inet_specific = pf; | |
1121 | break; | |
1122 | case PF_INET6: | |
1123 | if (sctp_pf_inet6_specific) | |
1124 | return 0; | |
1125 | sctp_pf_inet6_specific = pf; | |
1126 | break; | |
1127 | default: | |
1128 | return 0; | |
1129 | } | |
1130 | return 1; | |
1131 | } | |
1132 | ||
996b1dba YH |
1133 | static inline int init_sctp_mibs(void) |
1134 | { | |
7d720c3e | 1135 | return snmp_mib_init((void __percpu **)sctp_statistics, |
1823e4c8 ED |
1136 | sizeof(struct sctp_mib), |
1137 | __alignof__(struct sctp_mib)); | |
1da177e4 LT |
1138 | } |
1139 | ||
996b1dba | 1140 | static inline void cleanup_sctp_mibs(void) |
1da177e4 | 1141 | { |
7d720c3e | 1142 | snmp_mib_free((void __percpu **)sctp_statistics); |
1da177e4 LT |
1143 | } |
1144 | ||
270637ab VY |
1145 | static void sctp_v4_pf_init(void) |
1146 | { | |
1147 | /* Initialize the SCTP specific PF functions. */ | |
1148 | sctp_register_pf(&sctp_pf_inet, PF_INET); | |
1149 | sctp_register_af(&sctp_af_inet); | |
1150 | } | |
1151 | ||
1152 | static void sctp_v4_pf_exit(void) | |
1153 | { | |
1154 | list_del(&sctp_af_inet.list); | |
1155 | } | |
1156 | ||
1157 | static int sctp_v4_protosw_init(void) | |
1158 | { | |
1159 | int rc; | |
1160 | ||
1161 | rc = proto_register(&sctp_prot, 1); | |
1162 | if (rc) | |
1163 | return rc; | |
1164 | ||
1165 | /* Register SCTP(UDP and TCP style) with socket layer. */ | |
1166 | inet_register_protosw(&sctp_seqpacket_protosw); | |
1167 | inet_register_protosw(&sctp_stream_protosw); | |
1168 | ||
1169 | return 0; | |
1170 | } | |
1171 | ||
1172 | static void sctp_v4_protosw_exit(void) | |
1173 | { | |
1174 | inet_unregister_protosw(&sctp_stream_protosw); | |
1175 | inet_unregister_protosw(&sctp_seqpacket_protosw); | |
1176 | proto_unregister(&sctp_prot); | |
1177 | } | |
1178 | ||
1179 | static int sctp_v4_add_protocol(void) | |
1180 | { | |
1181 | /* Register notifier for inet address additions/deletions. */ | |
1182 | register_inetaddr_notifier(&sctp_inetaddr_notifier); | |
1183 | ||
1184 | /* Register SCTP with inet layer. */ | |
1185 | if (inet_add_protocol(&sctp_protocol, IPPROTO_SCTP) < 0) | |
1186 | return -EAGAIN; | |
1187 | ||
1188 | return 0; | |
1189 | } | |
1190 | ||
1191 | static void sctp_v4_del_protocol(void) | |
1192 | { | |
1193 | inet_del_protocol(&sctp_protocol, IPPROTO_SCTP); | |
1194 | unregister_inetaddr_notifier(&sctp_inetaddr_notifier); | |
1195 | } | |
1196 | ||
1da177e4 LT |
1197 | /* Initialize the universe into something sensible. */ |
1198 | SCTP_STATIC __init int sctp_init(void) | |
1199 | { | |
1200 | int i; | |
1201 | int status = -EINVAL; | |
1202 | unsigned long goal; | |
4d93df0a NH |
1203 | unsigned long limit; |
1204 | int max_share; | |
1da177e4 LT |
1205 | int order; |
1206 | ||
1207 | /* SCTP_DEBUG sanity check. */ | |
1208 | if (!sctp_sanity_check()) | |
1209 | goto out; | |
1210 | ||
827bf122 | 1211 | /* Allocate bind_bucket and chunk caches. */ |
1da177e4 LT |
1212 | status = -ENOBUFS; |
1213 | sctp_bucket_cachep = kmem_cache_create("sctp_bind_bucket", | |
1214 | sizeof(struct sctp_bind_bucket), | |
1215 | 0, SLAB_HWCACHE_ALIGN, | |
20c2df83 | 1216 | NULL); |
1da177e4 | 1217 | if (!sctp_bucket_cachep) |
827bf122 | 1218 | goto out; |
1da177e4 LT |
1219 | |
1220 | sctp_chunk_cachep = kmem_cache_create("sctp_chunk", | |
1221 | sizeof(struct sctp_chunk), | |
1222 | 0, SLAB_HWCACHE_ALIGN, | |
20c2df83 | 1223 | NULL); |
1da177e4 LT |
1224 | if (!sctp_chunk_cachep) |
1225 | goto err_chunk_cachep; | |
1226 | ||
1227 | /* Allocate and initialise sctp mibs. */ | |
1228 | status = init_sctp_mibs(); | |
1229 | if (status) | |
1230 | goto err_init_mibs; | |
1231 | ||
1232 | /* Initialize proc fs directory. */ | |
1233 | status = sctp_proc_init(); | |
1234 | if (status) | |
1235 | goto err_init_proc; | |
1236 | ||
1237 | /* Initialize object count debugging. */ | |
1238 | sctp_dbg_objcnt_init(); | |
1239 | ||
1da177e4 LT |
1240 | /* |
1241 | * 14. Suggested SCTP Protocol Parameter Values | |
1242 | */ | |
1243 | /* The following protocol parameters are RECOMMENDED: */ | |
1244 | /* RTO.Initial - 3 seconds */ | |
1245 | sctp_rto_initial = SCTP_RTO_INITIAL; | |
1246 | /* RTO.Min - 1 second */ | |
1247 | sctp_rto_min = SCTP_RTO_MIN; | |
1248 | /* RTO.Max - 60 seconds */ | |
1249 | sctp_rto_max = SCTP_RTO_MAX; | |
1250 | /* RTO.Alpha - 1/8 */ | |
1251 | sctp_rto_alpha = SCTP_RTO_ALPHA; | |
1252 | /* RTO.Beta - 1/4 */ | |
1253 | sctp_rto_beta = SCTP_RTO_BETA; | |
1254 | ||
1255 | /* Valid.Cookie.Life - 60 seconds */ | |
3fd091e7 | 1256 | sctp_valid_cookie_life = SCTP_DEFAULT_COOKIE_LIFE; |
1da177e4 LT |
1257 | |
1258 | /* Whether Cookie Preservative is enabled(1) or not(0) */ | |
1259 | sctp_cookie_preserve_enable = 1; | |
1260 | ||
1261 | /* Max.Burst - 4 */ | |
70331571 | 1262 | sctp_max_burst = SCTP_DEFAULT_MAX_BURST; |
1da177e4 LT |
1263 | |
1264 | /* Association.Max.Retrans - 10 attempts | |
1265 | * Path.Max.Retrans - 5 attempts (per destination address) | |
1266 | * Max.Init.Retransmits - 8 attempts | |
1267 | */ | |
1268 | sctp_max_retrans_association = 10; | |
1269 | sctp_max_retrans_path = 5; | |
1270 | sctp_max_retrans_init = 8; | |
1271 | ||
4eb701df NH |
1272 | /* Sendbuffer growth - do per-socket accounting */ |
1273 | sctp_sndbuf_policy = 0; | |
1274 | ||
049b3ff5 NH |
1275 | /* Rcvbuffer growth - do per-socket accounting */ |
1276 | sctp_rcvbuf_policy = 0; | |
1277 | ||
1da177e4 | 1278 | /* HB.interval - 30 seconds */ |
2f85a429 VY |
1279 | sctp_hb_interval = SCTP_DEFAULT_TIMEOUT_HEARTBEAT; |
1280 | ||
1281 | /* delayed SACK timeout */ | |
1282 | sctp_sack_timeout = SCTP_DEFAULT_TIMEOUT_SACK; | |
1da177e4 LT |
1283 | |
1284 | /* Implementation specific variables. */ | |
1285 | ||
1286 | /* Initialize default stream count setup information. */ | |
1287 | sctp_max_instreams = SCTP_DEFAULT_INSTREAMS; | |
1288 | sctp_max_outstreams = SCTP_DEFAULT_OUTSTREAMS; | |
1289 | ||
2692ba61 XW |
1290 | /* Initialize maximum autoclose timeout. */ |
1291 | sctp_max_autoclose = INT_MAX / HZ; | |
1292 | ||
1da177e4 LT |
1293 | /* Initialize handle used for association ids. */ |
1294 | idr_init(&sctp_assocs_id); | |
1295 | ||
f03d78db | 1296 | limit = nr_free_buffer_pages() / 8; |
4d93df0a NH |
1297 | limit = max(limit, 128UL); |
1298 | sysctl_sctp_mem[0] = limit / 4 * 3; | |
1299 | sysctl_sctp_mem[1] = limit; | |
1300 | sysctl_sctp_mem[2] = sysctl_sctp_mem[0] * 2; | |
1301 | ||
1302 | /* Set per-socket limits to no more than 1/128 the pressure threshold*/ | |
1303 | limit = (sysctl_sctp_mem[1]) << (PAGE_SHIFT - 7); | |
1304 | max_share = min(4UL*1024*1024, limit); | |
1305 | ||
845525a6 | 1306 | sysctl_sctp_rmem[0] = SK_MEM_QUANTUM; /* give each asoc 1 page min */ |
87fb4b7b | 1307 | sysctl_sctp_rmem[1] = 1500 * SKB_TRUESIZE(1); |
4d93df0a NH |
1308 | sysctl_sctp_rmem[2] = max(sysctl_sctp_rmem[1], max_share); |
1309 | ||
3ab224be | 1310 | sysctl_sctp_wmem[0] = SK_MEM_QUANTUM; |
4d93df0a NH |
1311 | sysctl_sctp_wmem[1] = 16*1024; |
1312 | sysctl_sctp_wmem[2] = max(64*1024, max_share); | |
1313 | ||
1da177e4 LT |
1314 | /* Size and allocate the association hash table. |
1315 | * The methodology is similar to that of the tcp hash tables. | |
1316 | */ | |
4481374c JB |
1317 | if (totalram_pages >= (128 * 1024)) |
1318 | goal = totalram_pages >> (22 - PAGE_SHIFT); | |
1da177e4 | 1319 | else |
4481374c | 1320 | goal = totalram_pages >> (24 - PAGE_SHIFT); |
1da177e4 LT |
1321 | |
1322 | for (order = 0; (1UL << order) < goal; order++) | |
1323 | ; | |
1324 | ||
1325 | do { | |
1326 | sctp_assoc_hashsize = (1UL << order) * PAGE_SIZE / | |
1327 | sizeof(struct sctp_hashbucket); | |
1328 | if ((sctp_assoc_hashsize > (64 * 1024)) && order > 0) | |
1329 | continue; | |
1330 | sctp_assoc_hashtable = (struct sctp_hashbucket *) | |
a84b50ce | 1331 | __get_free_pages(GFP_ATOMIC|__GFP_NOWARN, order); |
1da177e4 LT |
1332 | } while (!sctp_assoc_hashtable && --order > 0); |
1333 | if (!sctp_assoc_hashtable) { | |
145ce502 | 1334 | pr_err("Failed association hash alloc\n"); |
1da177e4 LT |
1335 | status = -ENOMEM; |
1336 | goto err_ahash_alloc; | |
1337 | } | |
1338 | for (i = 0; i < sctp_assoc_hashsize; i++) { | |
1339 | rwlock_init(&sctp_assoc_hashtable[i].lock); | |
d970dbf8 | 1340 | INIT_HLIST_HEAD(&sctp_assoc_hashtable[i].chain); |
1da177e4 LT |
1341 | } |
1342 | ||
1343 | /* Allocate and initialize the endpoint hash table. */ | |
1344 | sctp_ep_hashsize = 64; | |
1345 | sctp_ep_hashtable = (struct sctp_hashbucket *) | |
1346 | kmalloc(64 * sizeof(struct sctp_hashbucket), GFP_KERNEL); | |
1347 | if (!sctp_ep_hashtable) { | |
145ce502 | 1348 | pr_err("Failed endpoint_hash alloc\n"); |
1da177e4 LT |
1349 | status = -ENOMEM; |
1350 | goto err_ehash_alloc; | |
1351 | } | |
1352 | for (i = 0; i < sctp_ep_hashsize; i++) { | |
1353 | rwlock_init(&sctp_ep_hashtable[i].lock); | |
d970dbf8 | 1354 | INIT_HLIST_HEAD(&sctp_ep_hashtable[i].chain); |
1da177e4 LT |
1355 | } |
1356 | ||
1357 | /* Allocate and initialize the SCTP port hash table. */ | |
1358 | do { | |
1359 | sctp_port_hashsize = (1UL << order) * PAGE_SIZE / | |
1360 | sizeof(struct sctp_bind_hashbucket); | |
1361 | if ((sctp_port_hashsize > (64 * 1024)) && order > 0) | |
1362 | continue; | |
1363 | sctp_port_hashtable = (struct sctp_bind_hashbucket *) | |
a84b50ce | 1364 | __get_free_pages(GFP_ATOMIC|__GFP_NOWARN, order); |
1da177e4 LT |
1365 | } while (!sctp_port_hashtable && --order > 0); |
1366 | if (!sctp_port_hashtable) { | |
145ce502 | 1367 | pr_err("Failed bind hash alloc\n"); |
1da177e4 LT |
1368 | status = -ENOMEM; |
1369 | goto err_bhash_alloc; | |
1370 | } | |
1371 | for (i = 0; i < sctp_port_hashsize; i++) { | |
1372 | spin_lock_init(&sctp_port_hashtable[i].lock); | |
d970dbf8 | 1373 | INIT_HLIST_HEAD(&sctp_port_hashtable[i].chain); |
1da177e4 LT |
1374 | } |
1375 | ||
145ce502 | 1376 | pr_info("Hash tables configured (established %d bind %d)\n", |
1da177e4 LT |
1377 | sctp_assoc_hashsize, sctp_port_hashsize); |
1378 | ||
1379 | /* Disable ADDIP by default. */ | |
1380 | sctp_addip_enable = 0; | |
73d9c4fd | 1381 | sctp_addip_noauth = 0; |
9f7d653b | 1382 | sctp_default_auto_asconf = 0; |
1da177e4 LT |
1383 | |
1384 | /* Enable PR-SCTP by default. */ | |
1385 | sctp_prsctp_enable = 1; | |
1386 | ||
a29a5bd4 VY |
1387 | /* Disable AUTH by default. */ |
1388 | sctp_auth_enable = 0; | |
1389 | ||
72388433 BD |
1390 | /* Set SCOPE policy to enabled */ |
1391 | sctp_scope_policy = SCTP_SCOPE_POLICY_ENABLE; | |
1392 | ||
90f2f531 VY |
1393 | /* Set the default rwnd update threshold */ |
1394 | sctp_rwnd_upd_shift = SCTP_DEFAULT_RWND_SHIFT; | |
1395 | ||
1da177e4 LT |
1396 | sctp_sysctl_register(); |
1397 | ||
1398 | INIT_LIST_HEAD(&sctp_address_families); | |
270637ab VY |
1399 | sctp_v4_pf_init(); |
1400 | sctp_v6_pf_init(); | |
1da177e4 | 1401 | |
270637ab VY |
1402 | /* Initialize the local address list. */ |
1403 | INIT_LIST_HEAD(&sctp_local_addr_list); | |
1404 | spin_lock_init(&sctp_local_addr_lock); | |
1405 | sctp_get_local_addr_list(); | |
827bf122 | 1406 | |
9f7d653b MH |
1407 | /* Initialize the address event list */ |
1408 | INIT_LIST_HEAD(&sctp_addr_waitq); | |
1409 | INIT_LIST_HEAD(&sctp_auto_asconf_splist); | |
1410 | spin_lock_init(&sctp_addr_wq_lock); | |
1411 | sctp_addr_wq_timer.expires = 0; | |
1412 | setup_timer(&sctp_addr_wq_timer, sctp_addr_wq_timeout_handler, 0); | |
1413 | ||
270637ab | 1414 | status = sctp_v4_protosw_init(); |
827bf122 | 1415 | |
1da177e4 | 1416 | if (status) |
270637ab VY |
1417 | goto err_protosw_init; |
1418 | ||
1419 | status = sctp_v6_protosw_init(); | |
1420 | if (status) | |
1421 | goto err_v6_protosw_init; | |
1da177e4 LT |
1422 | |
1423 | /* Initialize the control inode/socket for handling OOTB packets. */ | |
1424 | if ((status = sctp_ctl_sock_init())) { | |
145ce502 | 1425 | pr_err("Failed to initialize the SCTP control sock\n"); |
1da177e4 LT |
1426 | goto err_ctl_sock_init; |
1427 | } | |
1428 | ||
270637ab VY |
1429 | status = sctp_v4_add_protocol(); |
1430 | if (status) | |
827bf122 | 1431 | goto err_add_protocol; |
827bf122 SS |
1432 | |
1433 | /* Register SCTP with inet6 layer. */ | |
1434 | status = sctp_v6_add_protocol(); | |
1435 | if (status) | |
1436 | goto err_v6_add_protocol; | |
1437 | ||
1da177e4 LT |
1438 | status = 0; |
1439 | out: | |
1440 | return status; | |
827bf122 | 1441 | err_v6_add_protocol: |
270637ab | 1442 | sctp_v4_del_protocol(); |
d1dd5247 | 1443 | err_add_protocol: |
5677242f | 1444 | inet_ctl_sock_destroy(sctp_ctl_sock); |
1da177e4 | 1445 | err_ctl_sock_init: |
270637ab VY |
1446 | sctp_v6_protosw_exit(); |
1447 | err_v6_protosw_init: | |
1448 | sctp_v4_protosw_exit(); | |
1449 | err_protosw_init: | |
1450 | sctp_free_local_addr_list(); | |
1451 | sctp_v4_pf_exit(); | |
1452 | sctp_v6_pf_exit(); | |
1da177e4 | 1453 | sctp_sysctl_unregister(); |
1da177e4 LT |
1454 | free_pages((unsigned long)sctp_port_hashtable, |
1455 | get_order(sctp_port_hashsize * | |
1456 | sizeof(struct sctp_bind_hashbucket))); | |
1457 | err_bhash_alloc: | |
1458 | kfree(sctp_ep_hashtable); | |
1459 | err_ehash_alloc: | |
1460 | free_pages((unsigned long)sctp_assoc_hashtable, | |
1461 | get_order(sctp_assoc_hashsize * | |
1462 | sizeof(struct sctp_hashbucket))); | |
1463 | err_ahash_alloc: | |
1464 | sctp_dbg_objcnt_exit(); | |
1da177e4 | 1465 | sctp_proc_exit(); |
827bf122 | 1466 | err_init_proc: |
1da177e4 LT |
1467 | cleanup_sctp_mibs(); |
1468 | err_init_mibs: | |
1469 | kmem_cache_destroy(sctp_chunk_cachep); | |
1470 | err_chunk_cachep: | |
1471 | kmem_cache_destroy(sctp_bucket_cachep); | |
1da177e4 LT |
1472 | goto out; |
1473 | } | |
1474 | ||
1475 | /* Exit handler for the SCTP protocol. */ | |
1476 | SCTP_STATIC __exit void sctp_exit(void) | |
1477 | { | |
1478 | /* BUG. This should probably do something useful like clean | |
1479 | * up all the remaining associations and all that memory. | |
1480 | */ | |
1481 | ||
827bf122 SS |
1482 | /* Unregister with inet6/inet layers. */ |
1483 | sctp_v6_del_protocol(); | |
270637ab | 1484 | sctp_v4_del_protocol(); |
9f7d653b | 1485 | sctp_free_addr_wq(); |
1da177e4 LT |
1486 | |
1487 | /* Free the control endpoint. */ | |
5677242f | 1488 | inet_ctl_sock_destroy(sctp_ctl_sock); |
1da177e4 | 1489 | |
270637ab VY |
1490 | /* Free protosw registrations */ |
1491 | sctp_v6_protosw_exit(); | |
1492 | sctp_v4_protosw_exit(); | |
1493 | ||
1494 | /* Free the local address list. */ | |
1495 | sctp_free_local_addr_list(); | |
827bf122 SS |
1496 | |
1497 | /* Unregister with socket layer. */ | |
270637ab VY |
1498 | sctp_v6_pf_exit(); |
1499 | sctp_v4_pf_exit(); | |
827bf122 | 1500 | |
1da177e4 | 1501 | sctp_sysctl_unregister(); |
1da177e4 LT |
1502 | |
1503 | free_pages((unsigned long)sctp_assoc_hashtable, | |
1504 | get_order(sctp_assoc_hashsize * | |
1505 | sizeof(struct sctp_hashbucket))); | |
1506 | kfree(sctp_ep_hashtable); | |
1507 | free_pages((unsigned long)sctp_port_hashtable, | |
1508 | get_order(sctp_port_hashsize * | |
1509 | sizeof(struct sctp_bind_hashbucket))); | |
1510 | ||
1da177e4 LT |
1511 | sctp_dbg_objcnt_exit(); |
1512 | sctp_proc_exit(); | |
1513 | cleanup_sctp_mibs(); | |
1514 | ||
eaa184a1 JDB |
1515 | rcu_barrier(); /* Wait for completion of call_rcu()'s */ |
1516 | ||
827bf122 SS |
1517 | kmem_cache_destroy(sctp_chunk_cachep); |
1518 | kmem_cache_destroy(sctp_bucket_cachep); | |
1da177e4 LT |
1519 | } |
1520 | ||
1521 | module_init(sctp_init); | |
1522 | module_exit(sctp_exit); | |
1523 | ||
bb97d31f ACM |
1524 | /* |
1525 | * __stringify doesn't likes enums, so use IPPROTO_SCTP value (132) directly. | |
1526 | */ | |
1527 | MODULE_ALIAS("net-pf-" __stringify(PF_INET) "-proto-132"); | |
882a382c | 1528 | MODULE_ALIAS("net-pf-" __stringify(PF_INET6) "-proto-132"); |
1da177e4 LT |
1529 | MODULE_AUTHOR("Linux Kernel SCTP developers <lksctp-developers@lists.sourceforge.net>"); |
1530 | MODULE_DESCRIPTION("Support for the SCTP protocol (RFC2960)"); | |
06e86806 LN |
1531 | module_param_named(no_checksums, sctp_checksum_disable, bool, 0644); |
1532 | MODULE_PARM_DESC(no_checksums, "Disable checksums computing and verification"); | |
1da177e4 | 1533 | MODULE_LICENSE("GPL"); |