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; |
1da177e4 LT |
72 | |
73 | struct idr sctp_assocs_id; | |
74 | DEFINE_SPINLOCK(sctp_assocs_id_lock); | |
75 | ||
1da177e4 LT |
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 | ||
e18b890b CL |
81 | struct kmem_cache *sctp_chunk_cachep __read_mostly; |
82 | struct kmem_cache *sctp_bucket_cachep __read_mostly; | |
1da177e4 | 83 | |
8d987e5c | 84 | long sysctl_sctp_mem[3]; |
007e3936 VY |
85 | int sysctl_sctp_rmem[3]; |
86 | int sysctl_sctp_wmem[3]; | |
4d93df0a | 87 | |
1da177e4 | 88 | /* Set up the proc fs entry for the SCTP protocol. */ |
f5f417c0 | 89 | static int __net_init sctp_proc_init(struct net *net) |
1da177e4 | 90 | { |
c4e85f82 | 91 | #ifdef CONFIG_PROC_FS |
13d782f6 EB |
92 | net->sctp.proc_net_sctp = proc_net_mkdir(net, "sctp", net->proc_net); |
93 | if (!net->sctp.proc_net_sctp) | |
94 | goto out_proc_net_sctp; | |
95 | if (sctp_snmp_proc_init(net)) | |
80896a35 | 96 | goto out_snmp_proc_init; |
13d782f6 | 97 | if (sctp_eps_proc_init(net)) |
80896a35 | 98 | goto out_eps_proc_init; |
13d782f6 | 99 | if (sctp_assocs_proc_init(net)) |
80896a35 | 100 | goto out_assocs_proc_init; |
13d782f6 | 101 | if (sctp_remaddr_proc_init(net)) |
caea902f | 102 | goto out_remaddr_proc_init; |
1da177e4 LT |
103 | |
104 | return 0; | |
105 | ||
caea902f | 106 | out_remaddr_proc_init: |
13d782f6 | 107 | sctp_assocs_proc_exit(net); |
80896a35 | 108 | out_assocs_proc_init: |
13d782f6 | 109 | sctp_eps_proc_exit(net); |
80896a35 | 110 | out_eps_proc_init: |
13d782f6 | 111 | sctp_snmp_proc_exit(net); |
80896a35 | 112 | out_snmp_proc_init: |
13d782f6 EB |
113 | remove_proc_entry("sctp", net->proc_net); |
114 | net->sctp.proc_net_sctp = NULL; | |
115 | out_proc_net_sctp: | |
157653ce | 116 | return -ENOMEM; |
13d782f6 EB |
117 | #endif /* CONFIG_PROC_FS */ |
118 | return 0; | |
1da177e4 LT |
119 | } |
120 | ||
d808ad9a | 121 | /* Clean up the proc fs entry for the SCTP protocol. |
1da177e4 LT |
122 | * Note: Do not make this __exit as it is used in the init error |
123 | * path. | |
124 | */ | |
13d782f6 | 125 | static void sctp_proc_exit(struct net *net) |
1da177e4 | 126 | { |
c4e85f82 | 127 | #ifdef CONFIG_PROC_FS |
13d782f6 EB |
128 | sctp_snmp_proc_exit(net); |
129 | sctp_eps_proc_exit(net); | |
130 | sctp_assocs_proc_exit(net); | |
131 | sctp_remaddr_proc_exit(net); | |
132 | ||
133 | remove_proc_entry("sctp", net->proc_net); | |
134 | net->sctp.proc_net_sctp = NULL; | |
c4e85f82 | 135 | #endif |
1da177e4 LT |
136 | } |
137 | ||
138 | /* Private helper to extract ipv4 address and stash them in | |
139 | * the protocol structure. | |
140 | */ | |
141 | static void sctp_v4_copy_addrlist(struct list_head *addrlist, | |
142 | struct net_device *dev) | |
143 | { | |
144 | struct in_device *in_dev; | |
145 | struct in_ifaddr *ifa; | |
146 | struct sctp_sockaddr_entry *addr; | |
147 | ||
148 | rcu_read_lock(); | |
e5ed6399 | 149 | if ((in_dev = __in_dev_get_rcu(dev)) == NULL) { |
1da177e4 LT |
150 | rcu_read_unlock(); |
151 | return; | |
152 | } | |
153 | ||
154 | for (ifa = in_dev->ifa_list; ifa; ifa = ifa->ifa_next) { | |
155 | /* Add the address to the local list. */ | |
156 | addr = t_new(struct sctp_sockaddr_entry, GFP_ATOMIC); | |
157 | if (addr) { | |
2a6fd78a AV |
158 | addr->a.v4.sin_family = AF_INET; |
159 | addr->a.v4.sin_port = 0; | |
160 | addr->a.v4.sin_addr.s_addr = ifa->ifa_local; | |
29303547 VY |
161 | addr->valid = 1; |
162 | INIT_LIST_HEAD(&addr->list); | |
1da177e4 LT |
163 | list_add_tail(&addr->list, addrlist); |
164 | } | |
165 | } | |
166 | ||
167 | rcu_read_unlock(); | |
168 | } | |
169 | ||
170 | /* Extract our IP addresses from the system and stash them in the | |
171 | * protocol structure. | |
172 | */ | |
4db67e80 | 173 | static void sctp_get_local_addr_list(struct net *net) |
1da177e4 LT |
174 | { |
175 | struct net_device *dev; | |
176 | struct list_head *pos; | |
177 | struct sctp_af *af; | |
178 | ||
c6d14c84 | 179 | rcu_read_lock(); |
4db67e80 | 180 | for_each_netdev_rcu(net, dev) { |
1da177e4 LT |
181 | __list_for_each(pos, &sctp_address_families) { |
182 | af = list_entry(pos, struct sctp_af, list); | |
4db67e80 | 183 | af->copy_addrlist(&net->sctp.local_addr_list, dev); |
1da177e4 LT |
184 | } |
185 | } | |
c6d14c84 | 186 | rcu_read_unlock(); |
1da177e4 LT |
187 | } |
188 | ||
1da177e4 | 189 | /* Free the existing local addresses. */ |
4db67e80 | 190 | static void sctp_free_local_addr_list(struct net *net) |
1da177e4 LT |
191 | { |
192 | struct sctp_sockaddr_entry *addr; | |
193 | struct list_head *pos, *temp; | |
194 | ||
4db67e80 | 195 | list_for_each_safe(pos, temp, &net->sctp.local_addr_list) { |
1da177e4 LT |
196 | addr = list_entry(pos, struct sctp_sockaddr_entry, list); |
197 | list_del(pos); | |
198 | kfree(addr); | |
199 | } | |
200 | } | |
201 | ||
1da177e4 | 202 | /* Copy the local addresses which are valid for 'scope' into 'bp'. */ |
4db67e80 EB |
203 | int sctp_copy_local_addr_list(struct net *net, struct sctp_bind_addr *bp, |
204 | sctp_scope_t scope, gfp_t gfp, int copy_flags) | |
1da177e4 LT |
205 | { |
206 | struct sctp_sockaddr_entry *addr; | |
207 | int error = 0; | |
1da177e4 | 208 | |
29303547 | 209 | rcu_read_lock(); |
4db67e80 | 210 | list_for_each_entry_rcu(addr, &net->sctp.local_addr_list, list) { |
29303547 VY |
211 | if (!addr->valid) |
212 | continue; | |
e7ff4a70 | 213 | if (sctp_in_scope(net, &addr->a, scope)) { |
1da177e4 LT |
214 | /* Now that the address is in scope, check to see if |
215 | * the address type is really supported by the local | |
216 | * sock as well as the remote peer. | |
217 | */ | |
6244be4e | 218 | if ((((AF_INET == addr->a.sa.sa_family) && |
1da177e4 | 219 | (copy_flags & SCTP_ADDR4_PEERSUPP))) || |
6244be4e | 220 | (((AF_INET6 == addr->a.sa.sa_family) && |
1da177e4 LT |
221 | (copy_flags & SCTP_ADDR6_ALLOWED) && |
222 | (copy_flags & SCTP_ADDR6_PEERSUPP)))) { | |
f57d96b2 VY |
223 | error = sctp_add_bind_addr(bp, &addr->a, |
224 | SCTP_ADDR_SRC, GFP_ATOMIC); | |
1da177e4 LT |
225 | if (error) |
226 | goto end_copy; | |
227 | } | |
228 | } | |
229 | } | |
230 | ||
231 | end_copy: | |
29303547 | 232 | rcu_read_unlock(); |
1da177e4 LT |
233 | return error; |
234 | } | |
235 | ||
236 | /* Initialize a sctp_addr from in incoming skb. */ | |
237 | static void sctp_v4_from_skb(union sctp_addr *addr, struct sk_buff *skb, | |
238 | int is_saddr) | |
239 | { | |
240 | void *from; | |
d55c41b1 | 241 | __be16 *port; |
1da177e4 LT |
242 | struct sctphdr *sh; |
243 | ||
244 | port = &addr->v4.sin_port; | |
245 | addr->v4.sin_family = AF_INET; | |
246 | ||
2c0fd387 | 247 | sh = sctp_hdr(skb); |
1da177e4 | 248 | if (is_saddr) { |
d55c41b1 | 249 | *port = sh->source; |
eddc9ec5 | 250 | from = &ip_hdr(skb)->saddr; |
1da177e4 | 251 | } else { |
d55c41b1 | 252 | *port = sh->dest; |
eddc9ec5 | 253 | from = &ip_hdr(skb)->daddr; |
1da177e4 LT |
254 | } |
255 | memcpy(&addr->v4.sin_addr.s_addr, from, sizeof(struct in_addr)); | |
256 | } | |
257 | ||
258 | /* Initialize an sctp_addr from a socket. */ | |
259 | static void sctp_v4_from_sk(union sctp_addr *addr, struct sock *sk) | |
260 | { | |
261 | addr->v4.sin_family = AF_INET; | |
7dcdbd95 | 262 | addr->v4.sin_port = 0; |
c720c7e8 | 263 | addr->v4.sin_addr.s_addr = inet_sk(sk)->inet_rcv_saddr; |
1da177e4 LT |
264 | } |
265 | ||
266 | /* Initialize sk->sk_rcv_saddr from sctp_addr. */ | |
267 | static void sctp_v4_to_sk_saddr(union sctp_addr *addr, struct sock *sk) | |
268 | { | |
c720c7e8 | 269 | inet_sk(sk)->inet_rcv_saddr = addr->v4.sin_addr.s_addr; |
1da177e4 LT |
270 | } |
271 | ||
272 | /* Initialize sk->sk_daddr from sctp_addr. */ | |
273 | static void sctp_v4_to_sk_daddr(union sctp_addr *addr, struct sock *sk) | |
274 | { | |
c720c7e8 | 275 | inet_sk(sk)->inet_daddr = addr->v4.sin_addr.s_addr; |
1da177e4 LT |
276 | } |
277 | ||
278 | /* Initialize a sctp_addr from an address parameter. */ | |
279 | static void sctp_v4_from_addr_param(union sctp_addr *addr, | |
280 | union sctp_addr_param *param, | |
dd86d136 | 281 | __be16 port, int iif) |
1da177e4 LT |
282 | { |
283 | addr->v4.sin_family = AF_INET; | |
284 | addr->v4.sin_port = port; | |
285 | addr->v4.sin_addr.s_addr = param->v4.addr.s_addr; | |
286 | } | |
287 | ||
288 | /* Initialize an address parameter from a sctp_addr and return the length | |
289 | * of the address parameter. | |
290 | */ | |
291 | static int sctp_v4_to_addr_param(const union sctp_addr *addr, | |
292 | union sctp_addr_param *param) | |
293 | { | |
294 | int length = sizeof(sctp_ipv4addr_param_t); | |
295 | ||
296 | param->v4.param_hdr.type = SCTP_PARAM_IPV4_ADDRESS; | |
dbc16db1 | 297 | param->v4.param_hdr.length = htons(length); |
d808ad9a | 298 | param->v4.addr.s_addr = addr->v4.sin_addr.s_addr; |
1da177e4 LT |
299 | |
300 | return length; | |
301 | } | |
302 | ||
303 | /* Initialize a sctp_addr from a dst_entry. */ | |
18a353f4 | 304 | static void sctp_v4_dst_saddr(union sctp_addr *saddr, struct flowi4 *fl4, |
854d43a4 | 305 | __be16 port) |
1da177e4 | 306 | { |
1da177e4 LT |
307 | saddr->v4.sin_family = AF_INET; |
308 | saddr->v4.sin_port = port; | |
18a353f4 | 309 | saddr->v4.sin_addr.s_addr = fl4->saddr; |
1da177e4 LT |
310 | } |
311 | ||
312 | /* Compare two addresses exactly. */ | |
313 | static int sctp_v4_cmp_addr(const union sctp_addr *addr1, | |
314 | const union sctp_addr *addr2) | |
315 | { | |
316 | if (addr1->sa.sa_family != addr2->sa.sa_family) | |
317 | return 0; | |
318 | if (addr1->v4.sin_port != addr2->v4.sin_port) | |
319 | return 0; | |
320 | if (addr1->v4.sin_addr.s_addr != addr2->v4.sin_addr.s_addr) | |
321 | return 0; | |
322 | ||
323 | return 1; | |
324 | } | |
325 | ||
326 | /* Initialize addr struct to INADDR_ANY. */ | |
6fbfa9f9 | 327 | static void sctp_v4_inaddr_any(union sctp_addr *addr, __be16 port) |
1da177e4 LT |
328 | { |
329 | addr->v4.sin_family = AF_INET; | |
e6f1cebf | 330 | addr->v4.sin_addr.s_addr = htonl(INADDR_ANY); |
1da177e4 LT |
331 | addr->v4.sin_port = port; |
332 | } | |
333 | ||
334 | /* Is this a wildcard address? */ | |
335 | static int sctp_v4_is_any(const union sctp_addr *addr) | |
336 | { | |
e6f1cebf | 337 | return htonl(INADDR_ANY) == addr->v4.sin_addr.s_addr; |
1da177e4 LT |
338 | } |
339 | ||
340 | /* This function checks if the address is a valid address to be used for | |
341 | * SCTP binding. | |
342 | * | |
343 | * Output: | |
344 | * Return 0 - If the address is a non-unicast or an illegal address. | |
345 | * Return 1 - If the address is a unicast. | |
346 | */ | |
5636bef7 VY |
347 | static int sctp_v4_addr_valid(union sctp_addr *addr, |
348 | struct sctp_sock *sp, | |
349 | const struct sk_buff *skb) | |
1da177e4 | 350 | { |
7dab83de VY |
351 | /* IPv4 addresses not allowed */ |
352 | if (sp && ipv6_only_sock(sctp_opt2sk(sp))) | |
353 | return 0; | |
354 | ||
1da177e4 | 355 | /* Is this a non-unicast address or a unusable SCTP address? */ |
b5cb2bbc | 356 | if (IS_IPV4_UNUSABLE_ADDRESS(addr->v4.sin_addr.s_addr)) |
1da177e4 LT |
357 | return 0; |
358 | ||
d808ad9a | 359 | /* Is this a broadcast address? */ |
511c3f92 | 360 | if (skb && skb_rtable(skb)->rt_flags & RTCF_BROADCAST) |
d808ad9a | 361 | return 0; |
5636bef7 | 362 | |
1da177e4 LT |
363 | return 1; |
364 | } | |
365 | ||
366 | /* Should this be available for binding? */ | |
367 | static int sctp_v4_available(union sctp_addr *addr, struct sctp_sock *sp) | |
368 | { | |
bb2db45b EB |
369 | struct net *net = sock_net(&sp->inet.sk); |
370 | int ret = inet_addr_type(net, addr->v4.sin_addr.s_addr); | |
1da177e4 | 371 | |
1da177e4 | 372 | |
e6f1cebf | 373 | if (addr->v4.sin_addr.s_addr != htonl(INADDR_ANY) && |
cdac4e07 NH |
374 | ret != RTN_LOCAL && |
375 | !sp->inet.freebind && | |
376 | !sysctl_ip_nonlocal_bind) | |
1da177e4 | 377 | return 0; |
cdac4e07 | 378 | |
7dab83de VY |
379 | if (ipv6_only_sock(sctp_opt2sk(sp))) |
380 | return 0; | |
381 | ||
1da177e4 LT |
382 | return 1; |
383 | } | |
384 | ||
385 | /* Checking the loopback, private and other address scopes as defined in | |
386 | * RFC 1918. The IPv4 scoping is based on the draft for SCTP IPv4 | |
387 | * scoping <draft-stewart-tsvwg-sctp-ipv4-00.txt>. | |
388 | * | |
389 | * Level 0 - unusable SCTP addresses | |
390 | * Level 1 - loopback address | |
391 | * Level 2 - link-local addresses | |
392 | * Level 3 - private addresses. | |
393 | * Level 4 - global addresses | |
394 | * For INIT and INIT-ACK address list, let L be the level of | |
395 | * of requested destination address, sender and receiver | |
396 | * SHOULD include all of its addresses with level greater | |
397 | * than or equal to L. | |
72388433 BD |
398 | * |
399 | * IPv4 scoping can be controlled through sysctl option | |
400 | * net.sctp.addr_scope_policy | |
1da177e4 LT |
401 | */ |
402 | static sctp_scope_t sctp_v4_scope(union sctp_addr *addr) | |
403 | { | |
404 | sctp_scope_t retval; | |
405 | ||
1da177e4 | 406 | /* Check for unusable SCTP addresses. */ |
b5cb2bbc | 407 | if (IS_IPV4_UNUSABLE_ADDRESS(addr->v4.sin_addr.s_addr)) { |
1da177e4 | 408 | retval = SCTP_SCOPE_UNUSABLE; |
b5cb2bbc | 409 | } else if (ipv4_is_loopback(addr->v4.sin_addr.s_addr)) { |
1da177e4 | 410 | retval = SCTP_SCOPE_LOOPBACK; |
b5cb2bbc | 411 | } else if (ipv4_is_linklocal_169(addr->v4.sin_addr.s_addr)) { |
1da177e4 | 412 | retval = SCTP_SCOPE_LINK; |
b5cb2bbc JP |
413 | } else if (ipv4_is_private_10(addr->v4.sin_addr.s_addr) || |
414 | ipv4_is_private_172(addr->v4.sin_addr.s_addr) || | |
415 | ipv4_is_private_192(addr->v4.sin_addr.s_addr)) { | |
1da177e4 LT |
416 | retval = SCTP_SCOPE_PRIVATE; |
417 | } else { | |
418 | retval = SCTP_SCOPE_GLOBAL; | |
419 | } | |
420 | ||
421 | return retval; | |
422 | } | |
423 | ||
424 | /* Returns a valid dst cache entry for the given source and destination ip | |
425 | * addresses. If an association is passed, trys to get a dst entry with a | |
426 | * source address that matches an address in the bind address list. | |
427 | */ | |
da0420be VY |
428 | static void sctp_v4_get_dst(struct sctp_transport *t, union sctp_addr *saddr, |
429 | struct flowi *fl, struct sock *sk) | |
1da177e4 | 430 | { |
da0420be | 431 | struct sctp_association *asoc = t->asoc; |
1da177e4 | 432 | struct rtable *rt; |
9914ae3c | 433 | struct flowi4 *fl4 = &fl->u.ip4; |
1da177e4 | 434 | struct sctp_bind_addr *bp; |
1da177e4 | 435 | struct sctp_sockaddr_entry *laddr; |
1da177e4 | 436 | struct dst_entry *dst = NULL; |
da0420be | 437 | union sctp_addr *daddr = &t->ipaddr; |
1da177e4 LT |
438 | union sctp_addr dst_saddr; |
439 | ||
9914ae3c VY |
440 | memset(fl4, 0x0, sizeof(struct flowi4)); |
441 | fl4->daddr = daddr->v4.sin_addr.s_addr; | |
442 | fl4->fl4_dport = daddr->v4.sin_port; | |
443 | fl4->flowi4_proto = IPPROTO_SCTP; | |
1da177e4 | 444 | if (asoc) { |
9914ae3c VY |
445 | fl4->flowi4_tos = RT_CONN_FLAGS(asoc->base.sk); |
446 | fl4->flowi4_oif = asoc->base.sk->sk_bound_dev_if; | |
447 | fl4->fl4_sport = htons(asoc->base.bind_addr.port); | |
1da177e4 | 448 | } |
6429d3dc | 449 | if (saddr) { |
9914ae3c VY |
450 | fl4->saddr = saddr->v4.sin_addr.s_addr; |
451 | fl4->fl4_sport = saddr->v4.sin_port; | |
6429d3dc | 452 | } |
1da177e4 | 453 | |
21454aaa | 454 | SCTP_DEBUG_PRINTK("%s: DST:%pI4, SRC:%pI4 - ", |
9914ae3c | 455 | __func__, &fl4->daddr, &fl4->saddr); |
1da177e4 | 456 | |
bb2db45b | 457 | rt = ip_route_output_key(sock_net(sk), fl4); |
b23dd4fe | 458 | if (!IS_ERR(rt)) |
d8d1f30b | 459 | dst = &rt->dst; |
1da177e4 LT |
460 | |
461 | /* If there is no association or if a source address is passed, no | |
462 | * more validation is required. | |
463 | */ | |
464 | if (!asoc || saddr) | |
465 | goto out; | |
466 | ||
467 | bp = &asoc->base.bind_addr; | |
1da177e4 LT |
468 | |
469 | if (dst) { | |
470 | /* Walk through the bind address list and look for a bind | |
471 | * address that matches the source address of the returned dst. | |
472 | */ | |
18a353f4 | 473 | sctp_v4_dst_saddr(&dst_saddr, fl4, htons(bp->port)); |
559cf710 VY |
474 | rcu_read_lock(); |
475 | list_for_each_entry_rcu(laddr, &bp->address_list, list) { | |
8a07eb0a MH |
476 | if (!laddr->valid || (laddr->state == SCTP_ADDR_DEL) || |
477 | (laddr->state != SCTP_ADDR_SRC && | |
478 | !asoc->src_out_of_asoc_ok)) | |
dc022a98 | 479 | continue; |
854d43a4 | 480 | if (sctp_v4_cmp_addr(&dst_saddr, &laddr->a)) |
1da177e4 LT |
481 | goto out_unlock; |
482 | } | |
559cf710 | 483 | rcu_read_unlock(); |
1da177e4 LT |
484 | |
485 | /* None of the bound addresses match the source address of the | |
486 | * dst. So release it. | |
487 | */ | |
488 | dst_release(dst); | |
489 | dst = NULL; | |
490 | } | |
491 | ||
492 | /* Walk through the bind address list and try to get a dst that | |
493 | * matches a bind address as the source address. | |
494 | */ | |
559cf710 VY |
495 | rcu_read_lock(); |
496 | list_for_each_entry_rcu(laddr, &bp->address_list, list) { | |
497 | if (!laddr->valid) | |
498 | continue; | |
f57d96b2 | 499 | if ((laddr->state == SCTP_ADDR_SRC) && |
6244be4e | 500 | (AF_INET == laddr->a.sa.sa_family)) { |
9914ae3c | 501 | fl4->fl4_sport = laddr->a.v4.sin_port; |
4de3e298 XZ |
502 | flowi4_update_output(fl4, |
503 | asoc->base.sk->sk_bound_dev_if, | |
504 | RT_CONN_FLAGS(asoc->base.sk), | |
505 | daddr->v4.sin_addr.s_addr, | |
506 | laddr->a.v4.sin_addr.s_addr); | |
507 | ||
bb2db45b | 508 | rt = ip_route_output_key(sock_net(sk), fl4); |
b23dd4fe | 509 | if (!IS_ERR(rt)) { |
d8d1f30b | 510 | dst = &rt->dst; |
1da177e4 LT |
511 | goto out_unlock; |
512 | } | |
513 | } | |
514 | } | |
515 | ||
516 | out_unlock: | |
559cf710 | 517 | rcu_read_unlock(); |
1da177e4 | 518 | out: |
da0420be | 519 | t->dst = dst; |
1da177e4 | 520 | if (dst) |
21454aaa | 521 | SCTP_DEBUG_PRINTK("rt_dst:%pI4, rt_src:%pI4\n", |
18a353f4 | 522 | &fl4->daddr, &fl4->saddr); |
1da177e4 LT |
523 | else |
524 | SCTP_DEBUG_PRINTK("NO ROUTE\n"); | |
1da177e4 LT |
525 | } |
526 | ||
527 | /* For v4, the source address is cached in the route entry(dst). So no need | |
528 | * to cache it separately and hence this is an empty routine. | |
529 | */ | |
e5117101 | 530 | static void sctp_v4_get_saddr(struct sctp_sock *sk, |
9914ae3c | 531 | struct sctp_transport *t, |
9914ae3c | 532 | struct flowi *fl) |
1da177e4 | 533 | { |
9914ae3c VY |
534 | union sctp_addr *saddr = &t->saddr; |
535 | struct rtable *rt = (struct rtable *)t->dst; | |
23ec47a0 | 536 | |
1da177e4 LT |
537 | if (rt) { |
538 | saddr->v4.sin_family = AF_INET; | |
902ebd3e | 539 | saddr->v4.sin_addr.s_addr = fl->u.ip4.saddr; |
1da177e4 LT |
540 | } |
541 | } | |
542 | ||
543 | /* What interface did this skb arrive on? */ | |
544 | static int sctp_v4_skb_iif(const struct sk_buff *skb) | |
545 | { | |
92101b3b | 546 | return inet_iif(skb); |
1da177e4 LT |
547 | } |
548 | ||
549 | /* Was this packet marked by Explicit Congestion Notification? */ | |
550 | static int sctp_v4_is_ce(const struct sk_buff *skb) | |
551 | { | |
eddc9ec5 | 552 | return INET_ECN_is_ce(ip_hdr(skb)->tos); |
1da177e4 LT |
553 | } |
554 | ||
555 | /* Create and initialize a new sk for the socket returned by accept(). */ | |
556 | static struct sock *sctp_v4_create_accept_sk(struct sock *sk, | |
557 | struct sctp_association *asoc) | |
558 | { | |
3b1e0a65 | 559 | struct sock *newsk = sk_alloc(sock_net(sk), PF_INET, GFP_KERNEL, |
6257ff21 | 560 | sk->sk_prot); |
914e1c8b | 561 | struct inet_sock *newinet; |
1da177e4 LT |
562 | |
563 | if (!newsk) | |
564 | goto out; | |
565 | ||
566 | sock_init_data(NULL, newsk); | |
567 | ||
914e1c8b | 568 | sctp_copy_sock(newsk, sk, asoc); |
1da177e4 LT |
569 | sock_reset_flag(newsk, SOCK_ZAPPED); |
570 | ||
571 | newinet = inet_sk(newsk); | |
572 | ||
c720c7e8 | 573 | newinet->inet_daddr = asoc->peer.primary_addr.v4.sin_addr.s_addr; |
1da177e4 | 574 | |
e6848976 | 575 | sk_refcnt_debug_inc(newsk); |
1da177e4 LT |
576 | |
577 | if (newsk->sk_prot->init(newsk)) { | |
578 | sk_common_release(newsk); | |
579 | newsk = NULL; | |
580 | } | |
581 | ||
582 | out: | |
583 | return newsk; | |
584 | } | |
585 | ||
586 | /* Map address, empty for v4 family */ | |
587 | static void sctp_v4_addr_v4map(struct sctp_sock *sp, union sctp_addr *addr) | |
588 | { | |
589 | /* Empty */ | |
590 | } | |
591 | ||
592 | /* Dump the v4 addr to the seq file. */ | |
593 | static void sctp_v4_seq_dump_addr(struct seq_file *seq, union sctp_addr *addr) | |
594 | { | |
21454aaa | 595 | seq_printf(seq, "%pI4 ", &addr->v4.sin_addr); |
1da177e4 LT |
596 | } |
597 | ||
b9031d9d VY |
598 | static void sctp_v4_ecn_capable(struct sock *sk) |
599 | { | |
600 | INET_ECN_xmit(sk); | |
601 | } | |
602 | ||
bd2a13e2 | 603 | static void sctp_addr_wq_timeout_handler(unsigned long arg) |
9f7d653b | 604 | { |
4db67e80 | 605 | struct net *net = (struct net *)arg; |
9f7d653b MH |
606 | struct sctp_sockaddr_entry *addrw, *temp; |
607 | struct sctp_sock *sp; | |
608 | ||
4db67e80 | 609 | spin_lock_bh(&net->sctp.addr_wq_lock); |
9f7d653b | 610 | |
4db67e80 | 611 | list_for_each_entry_safe(addrw, temp, &net->sctp.addr_waitq, list) { |
9f7d653b | 612 | SCTP_DEBUG_PRINTK_IPADDR("sctp_addrwq_timo_handler: the first ent in wq %p is ", |
4db67e80 | 613 | " for cmd %d at entry %p\n", &net->sctp.addr_waitq, &addrw->a, addrw->state, |
9f7d653b MH |
614 | addrw); |
615 | ||
dfd56b8b | 616 | #if IS_ENABLED(CONFIG_IPV6) |
9f7d653b MH |
617 | /* Now we send an ASCONF for each association */ |
618 | /* Note. we currently don't handle link local IPv6 addressees */ | |
619 | if (addrw->a.sa.sa_family == AF_INET6) { | |
620 | struct in6_addr *in6; | |
621 | ||
622 | if (ipv6_addr_type(&addrw->a.v6.sin6_addr) & | |
623 | IPV6_ADDR_LINKLOCAL) | |
624 | goto free_next; | |
625 | ||
626 | in6 = (struct in6_addr *)&addrw->a.v6.sin6_addr; | |
4db67e80 | 627 | if (ipv6_chk_addr(net, in6, NULL, 0) == 0 && |
9f7d653b MH |
628 | addrw->state == SCTP_ADDR_NEW) { |
629 | unsigned long timeo_val; | |
630 | ||
631 | SCTP_DEBUG_PRINTK("sctp_timo_handler: this is on DAD, trying %d sec later\n", | |
632 | SCTP_ADDRESS_TICK_DELAY); | |
633 | timeo_val = jiffies; | |
634 | timeo_val += msecs_to_jiffies(SCTP_ADDRESS_TICK_DELAY); | |
4db67e80 | 635 | mod_timer(&net->sctp.addr_wq_timer, timeo_val); |
9f7d653b MH |
636 | break; |
637 | } | |
638 | } | |
5d0c90cf | 639 | #endif |
4db67e80 | 640 | list_for_each_entry(sp, &net->sctp.auto_asconf_splist, auto_asconf_list) { |
9f7d653b MH |
641 | struct sock *sk; |
642 | ||
643 | sk = sctp_opt2sk(sp); | |
644 | /* ignore bound-specific endpoints */ | |
645 | if (!sctp_is_ep_boundall(sk)) | |
646 | continue; | |
647 | sctp_bh_lock_sock(sk); | |
648 | if (sctp_asconf_mgmt(sp, addrw) < 0) | |
649 | SCTP_DEBUG_PRINTK("sctp_addrwq_timo_handler: sctp_asconf_mgmt failed\n"); | |
650 | sctp_bh_unlock_sock(sk); | |
651 | } | |
39d84a58 | 652 | #if IS_ENABLED(CONFIG_IPV6) |
9f7d653b | 653 | free_next: |
39d84a58 | 654 | #endif |
9f7d653b MH |
655 | list_del(&addrw->list); |
656 | kfree(addrw); | |
657 | } | |
4db67e80 | 658 | spin_unlock_bh(&net->sctp.addr_wq_lock); |
9f7d653b MH |
659 | } |
660 | ||
4db67e80 | 661 | static void sctp_free_addr_wq(struct net *net) |
9f7d653b MH |
662 | { |
663 | struct sctp_sockaddr_entry *addrw; | |
664 | struct sctp_sockaddr_entry *temp; | |
665 | ||
4db67e80 EB |
666 | spin_lock_bh(&net->sctp.addr_wq_lock); |
667 | del_timer(&net->sctp.addr_wq_timer); | |
668 | list_for_each_entry_safe(addrw, temp, &net->sctp.addr_waitq, list) { | |
9f7d653b MH |
669 | list_del(&addrw->list); |
670 | kfree(addrw); | |
671 | } | |
4db67e80 | 672 | spin_unlock_bh(&net->sctp.addr_wq_lock); |
9f7d653b MH |
673 | } |
674 | ||
675 | /* lookup the entry for the same address in the addr_waitq | |
676 | * sctp_addr_wq MUST be locked | |
677 | */ | |
4db67e80 EB |
678 | static struct sctp_sockaddr_entry *sctp_addr_wq_lookup(struct net *net, |
679 | struct sctp_sockaddr_entry *addr) | |
9f7d653b MH |
680 | { |
681 | struct sctp_sockaddr_entry *addrw; | |
682 | ||
4db67e80 | 683 | list_for_each_entry(addrw, &net->sctp.addr_waitq, list) { |
9f7d653b MH |
684 | if (addrw->a.sa.sa_family != addr->a.sa.sa_family) |
685 | continue; | |
686 | if (addrw->a.sa.sa_family == AF_INET) { | |
687 | if (addrw->a.v4.sin_addr.s_addr == | |
688 | addr->a.v4.sin_addr.s_addr) | |
689 | return addrw; | |
690 | } else if (addrw->a.sa.sa_family == AF_INET6) { | |
691 | if (ipv6_addr_equal(&addrw->a.v6.sin6_addr, | |
692 | &addr->a.v6.sin6_addr)) | |
693 | return addrw; | |
694 | } | |
695 | } | |
696 | return NULL; | |
697 | } | |
698 | ||
4db67e80 | 699 | void sctp_addr_wq_mgmt(struct net *net, struct sctp_sockaddr_entry *addr, int cmd) |
9f7d653b MH |
700 | { |
701 | struct sctp_sockaddr_entry *addrw; | |
702 | unsigned long timeo_val; | |
703 | ||
704 | /* first, we check if an opposite message already exist in the queue. | |
705 | * If we found such message, it is removed. | |
706 | * This operation is a bit stupid, but the DHCP client attaches the | |
707 | * new address after a couple of addition and deletion of that address | |
708 | */ | |
709 | ||
4db67e80 | 710 | spin_lock_bh(&net->sctp.addr_wq_lock); |
9f7d653b | 711 | /* Offsets existing events in addr_wq */ |
4db67e80 | 712 | addrw = sctp_addr_wq_lookup(net, addr); |
9f7d653b MH |
713 | if (addrw) { |
714 | if (addrw->state != cmd) { | |
715 | SCTP_DEBUG_PRINTK_IPADDR("sctp_addr_wq_mgmt offsets existing entry for %d ", | |
716 | " in wq %p\n", addrw->state, &addrw->a, | |
4db67e80 | 717 | &net->sctp.addr_waitq); |
9f7d653b MH |
718 | list_del(&addrw->list); |
719 | kfree(addrw); | |
720 | } | |
4db67e80 | 721 | spin_unlock_bh(&net->sctp.addr_wq_lock); |
9f7d653b MH |
722 | return; |
723 | } | |
724 | ||
725 | /* OK, we have to add the new address to the wait queue */ | |
726 | addrw = kmemdup(addr, sizeof(struct sctp_sockaddr_entry), GFP_ATOMIC); | |
727 | if (addrw == NULL) { | |
4db67e80 | 728 | spin_unlock_bh(&net->sctp.addr_wq_lock); |
9f7d653b MH |
729 | return; |
730 | } | |
731 | addrw->state = cmd; | |
4db67e80 | 732 | list_add_tail(&addrw->list, &net->sctp.addr_waitq); |
9f7d653b | 733 | SCTP_DEBUG_PRINTK_IPADDR("sctp_addr_wq_mgmt add new entry for cmd:%d ", |
4db67e80 | 734 | " in wq %p\n", addrw->state, &addrw->a, &net->sctp.addr_waitq); |
9f7d653b | 735 | |
4db67e80 | 736 | if (!timer_pending(&net->sctp.addr_wq_timer)) { |
9f7d653b MH |
737 | timeo_val = jiffies; |
738 | timeo_val += msecs_to_jiffies(SCTP_ADDRESS_TICK_DELAY); | |
4db67e80 | 739 | mod_timer(&net->sctp.addr_wq_timer, timeo_val); |
9f7d653b | 740 | } |
4db67e80 | 741 | spin_unlock_bh(&net->sctp.addr_wq_lock); |
9f7d653b MH |
742 | } |
743 | ||
29303547 VY |
744 | /* Event handler for inet address addition/deletion events. |
745 | * The sctp_local_addr_list needs to be protocted by a spin lock since | |
746 | * multiple notifiers (say IPv4 and IPv6) may be running at the same | |
747 | * time and thus corrupt the list. | |
748 | * The reader side is protected with RCU. | |
749 | */ | |
24123186 AB |
750 | static int sctp_inetaddr_event(struct notifier_block *this, unsigned long ev, |
751 | void *ptr) | |
1da177e4 | 752 | { |
29c7cf96 | 753 | struct in_ifaddr *ifa = (struct in_ifaddr *)ptr; |
29303547 VY |
754 | struct sctp_sockaddr_entry *addr = NULL; |
755 | struct sctp_sockaddr_entry *temp; | |
4db67e80 | 756 | struct net *net = dev_net(ifa->ifa_dev->dev); |
22626216 | 757 | int found = 0; |
1da177e4 | 758 | |
29c7cf96 SS |
759 | switch (ev) { |
760 | case NETDEV_UP: | |
761 | addr = kmalloc(sizeof(struct sctp_sockaddr_entry), GFP_ATOMIC); | |
762 | if (addr) { | |
763 | addr->a.v4.sin_family = AF_INET; | |
764 | addr->a.v4.sin_port = 0; | |
765 | addr->a.v4.sin_addr.s_addr = ifa->ifa_local; | |
29303547 | 766 | addr->valid = 1; |
4db67e80 EB |
767 | spin_lock_bh(&net->sctp.local_addr_lock); |
768 | list_add_tail_rcu(&addr->list, &net->sctp.local_addr_list); | |
769 | sctp_addr_wq_mgmt(net, addr, SCTP_ADDR_NEW); | |
770 | spin_unlock_bh(&net->sctp.local_addr_lock); | |
29c7cf96 SS |
771 | } |
772 | break; | |
773 | case NETDEV_DOWN: | |
4db67e80 | 774 | spin_lock_bh(&net->sctp.local_addr_lock); |
29303547 | 775 | list_for_each_entry_safe(addr, temp, |
4db67e80 | 776 | &net->sctp.local_addr_list, list) { |
a40a7d15 PE |
777 | if (addr->a.sa.sa_family == AF_INET && |
778 | addr->a.v4.sin_addr.s_addr == | |
779 | ifa->ifa_local) { | |
4db67e80 | 780 | sctp_addr_wq_mgmt(net, addr, SCTP_ADDR_DEL); |
22626216 | 781 | found = 1; |
29303547 VY |
782 | addr->valid = 0; |
783 | list_del_rcu(&addr->list); | |
29c7cf96 SS |
784 | break; |
785 | } | |
786 | } | |
4db67e80 | 787 | spin_unlock_bh(&net->sctp.local_addr_lock); |
22626216 | 788 | if (found) |
1231f0ba | 789 | kfree_rcu(addr, rcu); |
29c7cf96 SS |
790 | break; |
791 | } | |
1da177e4 LT |
792 | |
793 | return NOTIFY_DONE; | |
794 | } | |
795 | ||
796 | /* | |
797 | * Initialize the control inode/socket with a control endpoint data | |
798 | * structure. This endpoint is reserved exclusively for the OOTB processing. | |
799 | */ | |
2ce95503 | 800 | static int sctp_ctl_sock_init(struct net *net) |
1da177e4 LT |
801 | { |
802 | int err; | |
fb13d9f9 | 803 | sa_family_t family = PF_INET; |
1da177e4 LT |
804 | |
805 | if (sctp_get_pf_specific(PF_INET6)) | |
806 | family = PF_INET6; | |
1da177e4 | 807 | |
2ce95503 EB |
808 | err = inet_ctl_sock_create(&net->sctp.ctl_sock, family, |
809 | SOCK_SEQPACKET, IPPROTO_SCTP, net); | |
fb13d9f9 BH |
810 | |
811 | /* If IPv6 socket could not be created, try the IPv4 socket */ | |
812 | if (err < 0 && family == PF_INET6) | |
2ce95503 | 813 | err = inet_ctl_sock_create(&net->sctp.ctl_sock, AF_INET, |
fb13d9f9 | 814 | SOCK_SEQPACKET, IPPROTO_SCTP, |
2ce95503 | 815 | net); |
fb13d9f9 | 816 | |
1da177e4 | 817 | if (err < 0) { |
145ce502 | 818 | pr_err("Failed to create the SCTP control socket\n"); |
1da177e4 LT |
819 | return err; |
820 | } | |
1da177e4 LT |
821 | return 0; |
822 | } | |
823 | ||
824 | /* Register address family specific functions. */ | |
825 | int sctp_register_af(struct sctp_af *af) | |
826 | { | |
827 | switch (af->sa_family) { | |
828 | case AF_INET: | |
829 | if (sctp_af_v4_specific) | |
830 | return 0; | |
831 | sctp_af_v4_specific = af; | |
832 | break; | |
833 | case AF_INET6: | |
834 | if (sctp_af_v6_specific) | |
835 | return 0; | |
836 | sctp_af_v6_specific = af; | |
837 | break; | |
838 | default: | |
839 | return 0; | |
840 | } | |
841 | ||
842 | INIT_LIST_HEAD(&af->list); | |
843 | list_add_tail(&af->list, &sctp_address_families); | |
844 | return 1; | |
845 | } | |
846 | ||
847 | /* Get the table of functions for manipulating a particular address | |
848 | * family. | |
849 | */ | |
850 | struct sctp_af *sctp_get_af_specific(sa_family_t family) | |
851 | { | |
852 | switch (family) { | |
853 | case AF_INET: | |
854 | return sctp_af_v4_specific; | |
855 | case AF_INET6: | |
856 | return sctp_af_v6_specific; | |
857 | default: | |
858 | return NULL; | |
859 | } | |
860 | } | |
861 | ||
862 | /* Common code to initialize a AF_INET msg_name. */ | |
863 | static void sctp_inet_msgname(char *msgname, int *addr_len) | |
864 | { | |
865 | struct sockaddr_in *sin; | |
866 | ||
867 | sin = (struct sockaddr_in *)msgname; | |
868 | *addr_len = sizeof(struct sockaddr_in); | |
869 | sin->sin_family = AF_INET; | |
870 | memset(sin->sin_zero, 0, sizeof(sin->sin_zero)); | |
871 | } | |
872 | ||
873 | /* Copy the primary address of the peer primary address as the msg_name. */ | |
874 | static void sctp_inet_event_msgname(struct sctp_ulpevent *event, char *msgname, | |
875 | int *addr_len) | |
876 | { | |
877 | struct sockaddr_in *sin, *sinfrom; | |
878 | ||
879 | if (msgname) { | |
880 | struct sctp_association *asoc; | |
881 | ||
882 | asoc = event->asoc; | |
883 | sctp_inet_msgname(msgname, addr_len); | |
884 | sin = (struct sockaddr_in *)msgname; | |
885 | sinfrom = &asoc->peer.primary_addr.v4; | |
886 | sin->sin_port = htons(asoc->peer.port); | |
887 | sin->sin_addr.s_addr = sinfrom->sin_addr.s_addr; | |
888 | } | |
889 | } | |
890 | ||
891 | /* Initialize and copy out a msgname from an inbound skb. */ | |
892 | static void sctp_inet_skb_msgname(struct sk_buff *skb, char *msgname, int *len) | |
893 | { | |
1da177e4 | 894 | if (msgname) { |
2c0fd387 ACM |
895 | struct sctphdr *sh = sctp_hdr(skb); |
896 | struct sockaddr_in *sin = (struct sockaddr_in *)msgname; | |
897 | ||
1da177e4 | 898 | sctp_inet_msgname(msgname, len); |
1da177e4 | 899 | sin->sin_port = sh->source; |
eddc9ec5 | 900 | sin->sin_addr.s_addr = ip_hdr(skb)->saddr; |
1da177e4 LT |
901 | } |
902 | } | |
903 | ||
904 | /* Do we support this AF? */ | |
905 | static int sctp_inet_af_supported(sa_family_t family, struct sctp_sock *sp) | |
906 | { | |
907 | /* PF_INET only supports AF_INET addresses. */ | |
a02cec21 | 908 | return AF_INET == family; |
1da177e4 LT |
909 | } |
910 | ||
911 | /* Address matching with wildcards allowed. */ | |
912 | static int sctp_inet_cmp_addr(const union sctp_addr *addr1, | |
913 | const union sctp_addr *addr2, | |
914 | struct sctp_sock *opt) | |
915 | { | |
916 | /* PF_INET only supports AF_INET addresses. */ | |
917 | if (addr1->sa.sa_family != addr2->sa.sa_family) | |
918 | return 0; | |
e6f1cebf AV |
919 | if (htonl(INADDR_ANY) == addr1->v4.sin_addr.s_addr || |
920 | htonl(INADDR_ANY) == addr2->v4.sin_addr.s_addr) | |
1da177e4 LT |
921 | return 1; |
922 | if (addr1->v4.sin_addr.s_addr == addr2->v4.sin_addr.s_addr) | |
923 | return 1; | |
924 | ||
925 | return 0; | |
926 | } | |
927 | ||
928 | /* Verify that provided sockaddr looks bindable. Common verification has | |
929 | * already been taken care of. | |
930 | */ | |
931 | static int sctp_inet_bind_verify(struct sctp_sock *opt, union sctp_addr *addr) | |
932 | { | |
933 | return sctp_v4_available(addr, opt); | |
934 | } | |
935 | ||
936 | /* Verify that sockaddr looks sendable. Common verification has already | |
937 | * been taken care of. | |
938 | */ | |
939 | static int sctp_inet_send_verify(struct sctp_sock *opt, union sctp_addr *addr) | |
940 | { | |
941 | return 1; | |
942 | } | |
943 | ||
944 | /* Fill in Supported Address Type information for INIT and INIT-ACK | |
945 | * chunks. Returns number of addresses supported. | |
946 | */ | |
947 | static int sctp_inet_supported_addrs(const struct sctp_sock *opt, | |
3dbe8656 | 948 | __be16 *types) |
1da177e4 LT |
949 | { |
950 | types[0] = SCTP_PARAM_IPV4_ADDRESS; | |
951 | return 1; | |
952 | } | |
953 | ||
954 | /* Wrapper routine that calls the ip transmit routine. */ | |
955 | static inline int sctp_v4_xmit(struct sk_buff *skb, | |
f880374c | 956 | struct sctp_transport *transport) |
1da177e4 | 957 | { |
f880374c HX |
958 | struct inet_sock *inet = inet_sk(skb->sk); |
959 | ||
21454aaa | 960 | SCTP_DEBUG_PRINTK("%s: skb:%p, len:%d, src:%pI4, dst:%pI4\n", |
0dc47877 | 961 | __func__, skb, skb->len, |
7ef73bca DM |
962 | &transport->fl.u.ip4.saddr, |
963 | &transport->fl.u.ip4.daddr); | |
1da177e4 | 964 | |
f880374c HX |
965 | inet->pmtudisc = transport->param_flags & SPP_PMTUD_ENABLE ? |
966 | IP_PMTUDISC_DO : IP_PMTUDISC_DONT; | |
967 | ||
b01a2407 | 968 | SCTP_INC_STATS(sock_net(&inet->sk), SCTP_MIB_OUTSCTPPACKS); |
d9d8da80 | 969 | return ip_queue_xmit(skb, &transport->fl); |
1da177e4 LT |
970 | } |
971 | ||
15efbe76 | 972 | static struct sctp_af sctp_af_inet; |
1da177e4 LT |
973 | |
974 | static struct sctp_pf sctp_pf_inet = { | |
975 | .event_msgname = sctp_inet_event_msgname, | |
976 | .skb_msgname = sctp_inet_skb_msgname, | |
977 | .af_supported = sctp_inet_af_supported, | |
978 | .cmp_addr = sctp_inet_cmp_addr, | |
979 | .bind_verify = sctp_inet_bind_verify, | |
980 | .send_verify = sctp_inet_send_verify, | |
981 | .supported_addrs = sctp_inet_supported_addrs, | |
982 | .create_accept_sk = sctp_v4_create_accept_sk, | |
983 | .addr_v4map = sctp_v4_addr_v4map, | |
15efbe76 | 984 | .af = &sctp_af_inet |
1da177e4 LT |
985 | }; |
986 | ||
987 | /* Notifier for inetaddr addition/deletion events. */ | |
988 | static struct notifier_block sctp_inetaddr_notifier = { | |
989 | .notifier_call = sctp_inetaddr_event, | |
990 | }; | |
991 | ||
992 | /* Socket operations. */ | |
90ddc4f0 | 993 | static const struct proto_ops inet_seqpacket_ops = { |
543d9cfe ACM |
994 | .family = PF_INET, |
995 | .owner = THIS_MODULE, | |
996 | .release = inet_release, /* Needs to be wrapped... */ | |
997 | .bind = inet_bind, | |
998 | .connect = inet_dgram_connect, | |
999 | .socketpair = sock_no_socketpair, | |
1000 | .accept = inet_accept, | |
1001 | .getname = inet_getname, /* Semantics are different. */ | |
1002 | .poll = sctp_poll, | |
1003 | .ioctl = inet_ioctl, | |
1004 | .listen = sctp_inet_listen, | |
1005 | .shutdown = inet_shutdown, /* Looks harmless. */ | |
1006 | .setsockopt = sock_common_setsockopt, /* IP_SOL IP_OPTION is a problem */ | |
1007 | .getsockopt = sock_common_getsockopt, | |
1008 | .sendmsg = inet_sendmsg, | |
1009 | .recvmsg = sock_common_recvmsg, | |
1010 | .mmap = sock_no_mmap, | |
1011 | .sendpage = sock_no_sendpage, | |
3fdadf7d | 1012 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
1013 | .compat_setsockopt = compat_sock_common_setsockopt, |
1014 | .compat_getsockopt = compat_sock_common_getsockopt, | |
3fdadf7d | 1015 | #endif |
1da177e4 LT |
1016 | }; |
1017 | ||
1018 | /* Registration with AF_INET family. */ | |
1019 | static struct inet_protosw sctp_seqpacket_protosw = { | |
1020 | .type = SOCK_SEQPACKET, | |
1021 | .protocol = IPPROTO_SCTP, | |
1022 | .prot = &sctp_prot, | |
1023 | .ops = &inet_seqpacket_ops, | |
1da177e4 LT |
1024 | .no_check = 0, |
1025 | .flags = SCTP_PROTOSW_FLAG | |
1026 | }; | |
1027 | static struct inet_protosw sctp_stream_protosw = { | |
1028 | .type = SOCK_STREAM, | |
1029 | .protocol = IPPROTO_SCTP, | |
1030 | .prot = &sctp_prot, | |
1031 | .ops = &inet_seqpacket_ops, | |
1da177e4 LT |
1032 | .no_check = 0, |
1033 | .flags = SCTP_PROTOSW_FLAG | |
1034 | }; | |
1035 | ||
1036 | /* Register with IP layer. */ | |
32613090 | 1037 | static const struct net_protocol sctp_protocol = { |
1da177e4 LT |
1038 | .handler = sctp_rcv, |
1039 | .err_handler = sctp_v4_err, | |
1040 | .no_policy = 1, | |
bb2db45b | 1041 | .netns_ok = 1, |
1da177e4 LT |
1042 | }; |
1043 | ||
1044 | /* IPv4 address related functions. */ | |
15efbe76 | 1045 | static struct sctp_af sctp_af_inet = { |
543d9cfe ACM |
1046 | .sa_family = AF_INET, |
1047 | .sctp_xmit = sctp_v4_xmit, | |
1048 | .setsockopt = ip_setsockopt, | |
1049 | .getsockopt = ip_getsockopt, | |
1050 | .get_dst = sctp_v4_get_dst, | |
1051 | .get_saddr = sctp_v4_get_saddr, | |
1052 | .copy_addrlist = sctp_v4_copy_addrlist, | |
1053 | .from_skb = sctp_v4_from_skb, | |
1054 | .from_sk = sctp_v4_from_sk, | |
1055 | .to_sk_saddr = sctp_v4_to_sk_saddr, | |
1056 | .to_sk_daddr = sctp_v4_to_sk_daddr, | |
1057 | .from_addr_param = sctp_v4_from_addr_param, | |
1058 | .to_addr_param = sctp_v4_to_addr_param, | |
543d9cfe ACM |
1059 | .cmp_addr = sctp_v4_cmp_addr, |
1060 | .addr_valid = sctp_v4_addr_valid, | |
1061 | .inaddr_any = sctp_v4_inaddr_any, | |
1062 | .is_any = sctp_v4_is_any, | |
1063 | .available = sctp_v4_available, | |
1064 | .scope = sctp_v4_scope, | |
1065 | .skb_iif = sctp_v4_skb_iif, | |
1066 | .is_ce = sctp_v4_is_ce, | |
1067 | .seq_dump_addr = sctp_v4_seq_dump_addr, | |
b9031d9d | 1068 | .ecn_capable = sctp_v4_ecn_capable, |
543d9cfe ACM |
1069 | .net_header_len = sizeof(struct iphdr), |
1070 | .sockaddr_len = sizeof(struct sockaddr_in), | |
3fdadf7d | 1071 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
1072 | .compat_setsockopt = compat_ip_setsockopt, |
1073 | .compat_getsockopt = compat_ip_getsockopt, | |
3fdadf7d | 1074 | #endif |
1da177e4 LT |
1075 | }; |
1076 | ||
1077 | struct sctp_pf *sctp_get_pf_specific(sa_family_t family) { | |
1078 | ||
1079 | switch (family) { | |
1080 | case PF_INET: | |
1081 | return sctp_pf_inet_specific; | |
1082 | case PF_INET6: | |
1083 | return sctp_pf_inet6_specific; | |
1084 | default: | |
1085 | return NULL; | |
1086 | } | |
1087 | } | |
1088 | ||
1089 | /* Register the PF specific function table. */ | |
1090 | int sctp_register_pf(struct sctp_pf *pf, sa_family_t family) | |
1091 | { | |
1092 | switch (family) { | |
1093 | case PF_INET: | |
1094 | if (sctp_pf_inet_specific) | |
1095 | return 0; | |
1096 | sctp_pf_inet_specific = pf; | |
1097 | break; | |
1098 | case PF_INET6: | |
1099 | if (sctp_pf_inet6_specific) | |
1100 | return 0; | |
1101 | sctp_pf_inet6_specific = pf; | |
1102 | break; | |
1103 | default: | |
1104 | return 0; | |
1105 | } | |
1106 | return 1; | |
1107 | } | |
1108 | ||
b01a2407 | 1109 | static inline int init_sctp_mibs(struct net *net) |
996b1dba | 1110 | { |
b01a2407 | 1111 | return snmp_mib_init((void __percpu **)net->sctp.sctp_statistics, |
1823e4c8 ED |
1112 | sizeof(struct sctp_mib), |
1113 | __alignof__(struct sctp_mib)); | |
1da177e4 LT |
1114 | } |
1115 | ||
b01a2407 | 1116 | static inline void cleanup_sctp_mibs(struct net *net) |
1da177e4 | 1117 | { |
b01a2407 | 1118 | snmp_mib_free((void __percpu **)net->sctp.sctp_statistics); |
1da177e4 LT |
1119 | } |
1120 | ||
270637ab VY |
1121 | static void sctp_v4_pf_init(void) |
1122 | { | |
1123 | /* Initialize the SCTP specific PF functions. */ | |
1124 | sctp_register_pf(&sctp_pf_inet, PF_INET); | |
1125 | sctp_register_af(&sctp_af_inet); | |
1126 | } | |
1127 | ||
1128 | static void sctp_v4_pf_exit(void) | |
1129 | { | |
1130 | list_del(&sctp_af_inet.list); | |
1131 | } | |
1132 | ||
1133 | static int sctp_v4_protosw_init(void) | |
1134 | { | |
1135 | int rc; | |
1136 | ||
1137 | rc = proto_register(&sctp_prot, 1); | |
1138 | if (rc) | |
1139 | return rc; | |
1140 | ||
1141 | /* Register SCTP(UDP and TCP style) with socket layer. */ | |
1142 | inet_register_protosw(&sctp_seqpacket_protosw); | |
1143 | inet_register_protosw(&sctp_stream_protosw); | |
1144 | ||
1145 | return 0; | |
1146 | } | |
1147 | ||
1148 | static void sctp_v4_protosw_exit(void) | |
1149 | { | |
1150 | inet_unregister_protosw(&sctp_stream_protosw); | |
1151 | inet_unregister_protosw(&sctp_seqpacket_protosw); | |
1152 | proto_unregister(&sctp_prot); | |
1153 | } | |
1154 | ||
1155 | static int sctp_v4_add_protocol(void) | |
1156 | { | |
1157 | /* Register notifier for inet address additions/deletions. */ | |
1158 | register_inetaddr_notifier(&sctp_inetaddr_notifier); | |
1159 | ||
1160 | /* Register SCTP with inet layer. */ | |
1161 | if (inet_add_protocol(&sctp_protocol, IPPROTO_SCTP) < 0) | |
1162 | return -EAGAIN; | |
1163 | ||
1164 | return 0; | |
1165 | } | |
1166 | ||
1167 | static void sctp_v4_del_protocol(void) | |
1168 | { | |
1169 | inet_del_protocol(&sctp_protocol, IPPROTO_SCTP); | |
1170 | unregister_inetaddr_notifier(&sctp_inetaddr_notifier); | |
1171 | } | |
1172 | ||
e7bb902b | 1173 | static int __net_init sctp_defaults_init(struct net *net) |
4db67e80 | 1174 | { |
2ce95503 EB |
1175 | int status; |
1176 | ||
e1fc3b14 EB |
1177 | /* |
1178 | * 14. Suggested SCTP Protocol Parameter Values | |
1179 | */ | |
1180 | /* The following protocol parameters are RECOMMENDED: */ | |
1181 | /* RTO.Initial - 3 seconds */ | |
1182 | net->sctp.rto_initial = SCTP_RTO_INITIAL; | |
1183 | /* RTO.Min - 1 second */ | |
1184 | net->sctp.rto_min = SCTP_RTO_MIN; | |
1185 | /* RTO.Max - 60 seconds */ | |
1186 | net->sctp.rto_max = SCTP_RTO_MAX; | |
1187 | /* RTO.Alpha - 1/8 */ | |
1188 | net->sctp.rto_alpha = SCTP_RTO_ALPHA; | |
1189 | /* RTO.Beta - 1/4 */ | |
1190 | net->sctp.rto_beta = SCTP_RTO_BETA; | |
1191 | ||
1192 | /* Valid.Cookie.Life - 60 seconds */ | |
1193 | net->sctp.valid_cookie_life = SCTP_DEFAULT_COOKIE_LIFE; | |
1194 | ||
1195 | /* Whether Cookie Preservative is enabled(1) or not(0) */ | |
1196 | net->sctp.cookie_preserve_enable = 1; | |
1197 | ||
3c68198e | 1198 | /* Default sctp sockets to use md5 as their hmac alg */ |
0d0863b0 | 1199 | #if defined (CONFIG_SCTP_DEFAULT_COOKIE_HMAC_MD5) |
3c68198e | 1200 | net->sctp.sctp_hmac_alg = "md5"; |
0d0863b0 | 1201 | #elif defined (CONFIG_SCTP_DEFAULT_COOKIE_HMAC_SHA1) |
3c68198e NH |
1202 | net->sctp.sctp_hmac_alg = "sha1"; |
1203 | #else | |
1204 | net->sctp.sctp_hmac_alg = NULL; | |
1205 | #endif | |
1206 | ||
e1fc3b14 EB |
1207 | /* Max.Burst - 4 */ |
1208 | net->sctp.max_burst = SCTP_DEFAULT_MAX_BURST; | |
1209 | ||
1210 | /* Association.Max.Retrans - 10 attempts | |
1211 | * Path.Max.Retrans - 5 attempts (per destination address) | |
1212 | * Max.Init.Retransmits - 8 attempts | |
1213 | */ | |
1214 | net->sctp.max_retrans_association = 10; | |
1215 | net->sctp.max_retrans_path = 5; | |
1216 | net->sctp.max_retrans_init = 8; | |
1217 | ||
1218 | /* Sendbuffer growth - do per-socket accounting */ | |
1219 | net->sctp.sndbuf_policy = 0; | |
1220 | ||
1221 | /* Rcvbuffer growth - do per-socket accounting */ | |
1222 | net->sctp.rcvbuf_policy = 0; | |
1223 | ||
1224 | /* HB.interval - 30 seconds */ | |
1225 | net->sctp.hb_interval = SCTP_DEFAULT_TIMEOUT_HEARTBEAT; | |
1226 | ||
1227 | /* delayed SACK timeout */ | |
1228 | net->sctp.sack_timeout = SCTP_DEFAULT_TIMEOUT_SACK; | |
1229 | ||
1230 | /* Disable ADDIP by default. */ | |
1231 | net->sctp.addip_enable = 0; | |
1232 | net->sctp.addip_noauth = 0; | |
1233 | net->sctp.default_auto_asconf = 0; | |
1234 | ||
1235 | /* Enable PR-SCTP by default. */ | |
1236 | net->sctp.prsctp_enable = 1; | |
1237 | ||
1238 | /* Disable AUTH by default. */ | |
1239 | net->sctp.auth_enable = 0; | |
1240 | ||
1241 | /* Set SCOPE policy to enabled */ | |
1242 | net->sctp.scope_policy = SCTP_SCOPE_POLICY_ENABLE; | |
1243 | ||
1244 | /* Set the default rwnd update threshold */ | |
1245 | net->sctp.rwnd_upd_shift = SCTP_DEFAULT_RWND_SHIFT; | |
1246 | ||
1247 | /* Initialize maximum autoclose timeout. */ | |
1248 | net->sctp.max_autoclose = INT_MAX / HZ; | |
1249 | ||
ebb7e95d EB |
1250 | status = sctp_sysctl_net_register(net); |
1251 | if (status) | |
1252 | goto err_sysctl_register; | |
1253 | ||
b01a2407 EB |
1254 | /* Allocate and initialise sctp mibs. */ |
1255 | status = init_sctp_mibs(net); | |
1256 | if (status) | |
1257 | goto err_init_mibs; | |
1258 | ||
13d782f6 EB |
1259 | /* Initialize proc fs directory. */ |
1260 | status = sctp_proc_init(net); | |
1261 | if (status) | |
1262 | goto err_init_proc; | |
1263 | ||
1264 | sctp_dbg_objcnt_init(net); | |
1265 | ||
4db67e80 EB |
1266 | /* Initialize the local address list. */ |
1267 | INIT_LIST_HEAD(&net->sctp.local_addr_list); | |
1268 | spin_lock_init(&net->sctp.local_addr_lock); | |
1269 | sctp_get_local_addr_list(net); | |
1270 | ||
1271 | /* Initialize the address event list */ | |
1272 | INIT_LIST_HEAD(&net->sctp.addr_waitq); | |
1273 | INIT_LIST_HEAD(&net->sctp.auto_asconf_splist); | |
1274 | spin_lock_init(&net->sctp.addr_wq_lock); | |
1275 | net->sctp.addr_wq_timer.expires = 0; | |
1276 | setup_timer(&net->sctp.addr_wq_timer, sctp_addr_wq_timeout_handler, | |
1277 | (unsigned long)net); | |
1278 | ||
1279 | return 0; | |
2ce95503 | 1280 | |
13d782f6 | 1281 | err_init_proc: |
b01a2407 EB |
1282 | cleanup_sctp_mibs(net); |
1283 | err_init_mibs: | |
ebb7e95d EB |
1284 | sctp_sysctl_net_unregister(net); |
1285 | err_sysctl_register: | |
2ce95503 | 1286 | return status; |
4db67e80 EB |
1287 | } |
1288 | ||
e7bb902b | 1289 | static void __net_exit sctp_defaults_exit(struct net *net) |
4db67e80 EB |
1290 | { |
1291 | /* Free the local address list */ | |
1292 | sctp_free_addr_wq(net); | |
1293 | sctp_free_local_addr_list(net); | |
2ce95503 | 1294 | |
13d782f6 EB |
1295 | sctp_dbg_objcnt_exit(net); |
1296 | ||
1297 | sctp_proc_exit(net); | |
b01a2407 | 1298 | cleanup_sctp_mibs(net); |
ebb7e95d | 1299 | sctp_sysctl_net_unregister(net); |
4db67e80 EB |
1300 | } |
1301 | ||
e7bb902b MRL |
1302 | static struct pernet_operations sctp_defaults_ops = { |
1303 | .init = sctp_defaults_init, | |
1304 | .exit = sctp_defaults_exit, | |
1305 | }; | |
1306 | ||
1307 | static int __net_init sctp_ctrlsock_init(struct net *net) | |
1308 | { | |
1309 | int status; | |
1310 | ||
1311 | /* Initialize the control inode/socket for handling OOTB packets. */ | |
1312 | status = sctp_ctl_sock_init(net); | |
1313 | if (status) | |
1314 | pr_err("Failed to initialize the SCTP control sock\n"); | |
1315 | ||
1316 | return status; | |
1317 | } | |
1318 | ||
1319 | static void __net_init sctp_ctrlsock_exit(struct net *net) | |
1320 | { | |
1321 | /* Free the control endpoint. */ | |
1322 | inet_ctl_sock_destroy(net->sctp.ctl_sock); | |
1323 | } | |
1324 | ||
1325 | static struct pernet_operations sctp_ctrlsock_ops = { | |
1326 | .init = sctp_ctrlsock_init, | |
1327 | .exit = sctp_ctrlsock_exit, | |
4db67e80 EB |
1328 | }; |
1329 | ||
1da177e4 LT |
1330 | /* Initialize the universe into something sensible. */ |
1331 | SCTP_STATIC __init int sctp_init(void) | |
1332 | { | |
1333 | int i; | |
1334 | int status = -EINVAL; | |
1335 | unsigned long goal; | |
4d93df0a NH |
1336 | unsigned long limit; |
1337 | int max_share; | |
1da177e4 LT |
1338 | int order; |
1339 | ||
1340 | /* SCTP_DEBUG sanity check. */ | |
1341 | if (!sctp_sanity_check()) | |
1342 | goto out; | |
1343 | ||
827bf122 | 1344 | /* Allocate bind_bucket and chunk caches. */ |
1da177e4 LT |
1345 | status = -ENOBUFS; |
1346 | sctp_bucket_cachep = kmem_cache_create("sctp_bind_bucket", | |
1347 | sizeof(struct sctp_bind_bucket), | |
1348 | 0, SLAB_HWCACHE_ALIGN, | |
20c2df83 | 1349 | NULL); |
1da177e4 | 1350 | if (!sctp_bucket_cachep) |
827bf122 | 1351 | goto out; |
1da177e4 LT |
1352 | |
1353 | sctp_chunk_cachep = kmem_cache_create("sctp_chunk", | |
1354 | sizeof(struct sctp_chunk), | |
1355 | 0, SLAB_HWCACHE_ALIGN, | |
20c2df83 | 1356 | NULL); |
1da177e4 LT |
1357 | if (!sctp_chunk_cachep) |
1358 | goto err_chunk_cachep; | |
1359 | ||
632c928a EB |
1360 | status = percpu_counter_init(&sctp_sockets_allocated, 0); |
1361 | if (status) | |
1362 | goto err_percpu_counter_init; | |
1363 | ||
1da177e4 LT |
1364 | /* Implementation specific variables. */ |
1365 | ||
1366 | /* Initialize default stream count setup information. */ | |
1367 | sctp_max_instreams = SCTP_DEFAULT_INSTREAMS; | |
1368 | sctp_max_outstreams = SCTP_DEFAULT_OUTSTREAMS; | |
1369 | ||
1370 | /* Initialize handle used for association ids. */ | |
1371 | idr_init(&sctp_assocs_id); | |
1372 | ||
f03d78db | 1373 | limit = nr_free_buffer_pages() / 8; |
4d93df0a NH |
1374 | limit = max(limit, 128UL); |
1375 | sysctl_sctp_mem[0] = limit / 4 * 3; | |
1376 | sysctl_sctp_mem[1] = limit; | |
1377 | sysctl_sctp_mem[2] = sysctl_sctp_mem[0] * 2; | |
1378 | ||
1379 | /* Set per-socket limits to no more than 1/128 the pressure threshold*/ | |
1380 | limit = (sysctl_sctp_mem[1]) << (PAGE_SHIFT - 7); | |
1381 | max_share = min(4UL*1024*1024, limit); | |
1382 | ||
845525a6 | 1383 | sysctl_sctp_rmem[0] = SK_MEM_QUANTUM; /* give each asoc 1 page min */ |
87fb4b7b | 1384 | sysctl_sctp_rmem[1] = 1500 * SKB_TRUESIZE(1); |
4d93df0a NH |
1385 | sysctl_sctp_rmem[2] = max(sysctl_sctp_rmem[1], max_share); |
1386 | ||
3ab224be | 1387 | sysctl_sctp_wmem[0] = SK_MEM_QUANTUM; |
4d93df0a NH |
1388 | sysctl_sctp_wmem[1] = 16*1024; |
1389 | sysctl_sctp_wmem[2] = max(64*1024, max_share); | |
1390 | ||
1da177e4 LT |
1391 | /* Size and allocate the association hash table. |
1392 | * The methodology is similar to that of the tcp hash tables. | |
1393 | */ | |
4481374c JB |
1394 | if (totalram_pages >= (128 * 1024)) |
1395 | goal = totalram_pages >> (22 - PAGE_SHIFT); | |
1da177e4 | 1396 | else |
4481374c | 1397 | goal = totalram_pages >> (24 - PAGE_SHIFT); |
1da177e4 LT |
1398 | |
1399 | for (order = 0; (1UL << order) < goal; order++) | |
1400 | ; | |
1401 | ||
1402 | do { | |
1403 | sctp_assoc_hashsize = (1UL << order) * PAGE_SIZE / | |
1404 | sizeof(struct sctp_hashbucket); | |
1405 | if ((sctp_assoc_hashsize > (64 * 1024)) && order > 0) | |
1406 | continue; | |
1407 | sctp_assoc_hashtable = (struct sctp_hashbucket *) | |
a84b50ce | 1408 | __get_free_pages(GFP_ATOMIC|__GFP_NOWARN, order); |
1da177e4 LT |
1409 | } while (!sctp_assoc_hashtable && --order > 0); |
1410 | if (!sctp_assoc_hashtable) { | |
145ce502 | 1411 | pr_err("Failed association hash alloc\n"); |
1da177e4 LT |
1412 | status = -ENOMEM; |
1413 | goto err_ahash_alloc; | |
1414 | } | |
1415 | for (i = 0; i < sctp_assoc_hashsize; i++) { | |
1416 | rwlock_init(&sctp_assoc_hashtable[i].lock); | |
d970dbf8 | 1417 | INIT_HLIST_HEAD(&sctp_assoc_hashtable[i].chain); |
1da177e4 LT |
1418 | } |
1419 | ||
1420 | /* Allocate and initialize the endpoint hash table. */ | |
1421 | sctp_ep_hashsize = 64; | |
3b77d661 | 1422 | sctp_ep_hashtable = |
1da177e4 LT |
1423 | kmalloc(64 * sizeof(struct sctp_hashbucket), GFP_KERNEL); |
1424 | if (!sctp_ep_hashtable) { | |
145ce502 | 1425 | pr_err("Failed endpoint_hash alloc\n"); |
1da177e4 LT |
1426 | status = -ENOMEM; |
1427 | goto err_ehash_alloc; | |
1428 | } | |
1429 | for (i = 0; i < sctp_ep_hashsize; i++) { | |
1430 | rwlock_init(&sctp_ep_hashtable[i].lock); | |
d970dbf8 | 1431 | INIT_HLIST_HEAD(&sctp_ep_hashtable[i].chain); |
1da177e4 LT |
1432 | } |
1433 | ||
1434 | /* Allocate and initialize the SCTP port hash table. */ | |
1435 | do { | |
1436 | sctp_port_hashsize = (1UL << order) * PAGE_SIZE / | |
1437 | sizeof(struct sctp_bind_hashbucket); | |
1438 | if ((sctp_port_hashsize > (64 * 1024)) && order > 0) | |
1439 | continue; | |
1440 | sctp_port_hashtable = (struct sctp_bind_hashbucket *) | |
a84b50ce | 1441 | __get_free_pages(GFP_ATOMIC|__GFP_NOWARN, order); |
1da177e4 LT |
1442 | } while (!sctp_port_hashtable && --order > 0); |
1443 | if (!sctp_port_hashtable) { | |
145ce502 | 1444 | pr_err("Failed bind hash alloc\n"); |
1da177e4 LT |
1445 | status = -ENOMEM; |
1446 | goto err_bhash_alloc; | |
1447 | } | |
1448 | for (i = 0; i < sctp_port_hashsize; i++) { | |
1449 | spin_lock_init(&sctp_port_hashtable[i].lock); | |
d970dbf8 | 1450 | INIT_HLIST_HEAD(&sctp_port_hashtable[i].chain); |
1da177e4 LT |
1451 | } |
1452 | ||
145ce502 | 1453 | pr_info("Hash tables configured (established %d bind %d)\n", |
1da177e4 LT |
1454 | sctp_assoc_hashsize, sctp_port_hashsize); |
1455 | ||
1da177e4 LT |
1456 | sctp_sysctl_register(); |
1457 | ||
1458 | INIT_LIST_HEAD(&sctp_address_families); | |
270637ab VY |
1459 | sctp_v4_pf_init(); |
1460 | sctp_v6_pf_init(); | |
1da177e4 | 1461 | |
e7bb902b MRL |
1462 | status = register_pernet_subsys(&sctp_defaults_ops); |
1463 | if (status) | |
1464 | goto err_register_defaults; | |
827bf122 | 1465 | |
e7bb902b | 1466 | status = sctp_v4_protosw_init(); |
1da177e4 | 1467 | if (status) |
270637ab VY |
1468 | goto err_protosw_init; |
1469 | ||
1470 | status = sctp_v6_protosw_init(); | |
1471 | if (status) | |
1472 | goto err_v6_protosw_init; | |
1da177e4 | 1473 | |
e7bb902b | 1474 | status = register_pernet_subsys(&sctp_ctrlsock_ops); |
4db67e80 | 1475 | if (status) |
e7bb902b | 1476 | goto err_register_ctrlsock; |
4db67e80 | 1477 | |
270637ab VY |
1478 | status = sctp_v4_add_protocol(); |
1479 | if (status) | |
827bf122 | 1480 | goto err_add_protocol; |
827bf122 SS |
1481 | |
1482 | /* Register SCTP with inet6 layer. */ | |
1483 | status = sctp_v6_add_protocol(); | |
1484 | if (status) | |
1485 | goto err_v6_add_protocol; | |
1486 | ||
1da177e4 LT |
1487 | status = 0; |
1488 | out: | |
1489 | return status; | |
827bf122 | 1490 | err_v6_add_protocol: |
270637ab | 1491 | sctp_v4_del_protocol(); |
d1dd5247 | 1492 | err_add_protocol: |
e7bb902b MRL |
1493 | unregister_pernet_subsys(&sctp_ctrlsock_ops); |
1494 | err_register_ctrlsock: | |
270637ab VY |
1495 | sctp_v6_protosw_exit(); |
1496 | err_v6_protosw_init: | |
1497 | sctp_v4_protosw_exit(); | |
1498 | err_protosw_init: | |
e7bb902b MRL |
1499 | unregister_pernet_subsys(&sctp_defaults_ops); |
1500 | err_register_defaults: | |
270637ab VY |
1501 | sctp_v4_pf_exit(); |
1502 | sctp_v6_pf_exit(); | |
1da177e4 | 1503 | sctp_sysctl_unregister(); |
1da177e4 LT |
1504 | free_pages((unsigned long)sctp_port_hashtable, |
1505 | get_order(sctp_port_hashsize * | |
1506 | sizeof(struct sctp_bind_hashbucket))); | |
1507 | err_bhash_alloc: | |
1508 | kfree(sctp_ep_hashtable); | |
1509 | err_ehash_alloc: | |
1510 | free_pages((unsigned long)sctp_assoc_hashtable, | |
1511 | get_order(sctp_assoc_hashsize * | |
1512 | sizeof(struct sctp_hashbucket))); | |
1513 | err_ahash_alloc: | |
632c928a EB |
1514 | percpu_counter_destroy(&sctp_sockets_allocated); |
1515 | err_percpu_counter_init: | |
1da177e4 LT |
1516 | kmem_cache_destroy(sctp_chunk_cachep); |
1517 | err_chunk_cachep: | |
1518 | kmem_cache_destroy(sctp_bucket_cachep); | |
1da177e4 LT |
1519 | goto out; |
1520 | } | |
1521 | ||
1522 | /* Exit handler for the SCTP protocol. */ | |
1523 | SCTP_STATIC __exit void sctp_exit(void) | |
1524 | { | |
1525 | /* BUG. This should probably do something useful like clean | |
1526 | * up all the remaining associations and all that memory. | |
1527 | */ | |
1528 | ||
827bf122 SS |
1529 | /* Unregister with inet6/inet layers. */ |
1530 | sctp_v6_del_protocol(); | |
270637ab | 1531 | sctp_v4_del_protocol(); |
1da177e4 | 1532 | |
e7bb902b | 1533 | unregister_pernet_subsys(&sctp_ctrlsock_ops); |
4db67e80 | 1534 | |
270637ab VY |
1535 | /* Free protosw registrations */ |
1536 | sctp_v6_protosw_exit(); | |
1537 | sctp_v4_protosw_exit(); | |
1538 | ||
e7bb902b MRL |
1539 | unregister_pernet_subsys(&sctp_defaults_ops); |
1540 | ||
827bf122 | 1541 | /* Unregister with socket layer. */ |
270637ab VY |
1542 | sctp_v6_pf_exit(); |
1543 | sctp_v4_pf_exit(); | |
827bf122 | 1544 | |
1da177e4 | 1545 | sctp_sysctl_unregister(); |
1da177e4 LT |
1546 | |
1547 | free_pages((unsigned long)sctp_assoc_hashtable, | |
1548 | get_order(sctp_assoc_hashsize * | |
1549 | sizeof(struct sctp_hashbucket))); | |
1550 | kfree(sctp_ep_hashtable); | |
1551 | free_pages((unsigned long)sctp_port_hashtable, | |
1552 | get_order(sctp_port_hashsize * | |
1553 | sizeof(struct sctp_bind_hashbucket))); | |
1554 | ||
632c928a | 1555 | percpu_counter_destroy(&sctp_sockets_allocated); |
1da177e4 | 1556 | |
eaa184a1 JDB |
1557 | rcu_barrier(); /* Wait for completion of call_rcu()'s */ |
1558 | ||
827bf122 SS |
1559 | kmem_cache_destroy(sctp_chunk_cachep); |
1560 | kmem_cache_destroy(sctp_bucket_cachep); | |
1da177e4 LT |
1561 | } |
1562 | ||
1563 | module_init(sctp_init); | |
1564 | module_exit(sctp_exit); | |
1565 | ||
bb97d31f ACM |
1566 | /* |
1567 | * __stringify doesn't likes enums, so use IPPROTO_SCTP value (132) directly. | |
1568 | */ | |
1569 | MODULE_ALIAS("net-pf-" __stringify(PF_INET) "-proto-132"); | |
882a382c | 1570 | MODULE_ALIAS("net-pf-" __stringify(PF_INET6) "-proto-132"); |
1da177e4 LT |
1571 | MODULE_AUTHOR("Linux Kernel SCTP developers <lksctp-developers@lists.sourceforge.net>"); |
1572 | MODULE_DESCRIPTION("Support for the SCTP protocol (RFC2960)"); | |
06e86806 LN |
1573 | module_param_named(no_checksums, sctp_checksum_disable, bool, 0644); |
1574 | MODULE_PARM_DESC(no_checksums, "Disable checksums computing and verification"); | |
1da177e4 | 1575 | MODULE_LICENSE("GPL"); |