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1da177e4 LT |
1 | /* SCTP kernel reference Implementation |
2 | * (C) Copyright IBM Corp. 2002, 2004 | |
3 | * Copyright (c) 2001 Nokia, Inc. | |
4 | * Copyright (c) 2001 La Monte H.P. Yarroll | |
5 | * Copyright (c) 2002-2003 Intel Corp. | |
6 | * | |
7 | * This file is part of the SCTP kernel reference Implementation | |
8 | * | |
9 | * SCTP over IPv6. | |
10 | * | |
11 | * The SCTP reference implementation is free software; | |
12 | * you can redistribute it and/or modify it under the terms of | |
13 | * the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2, or (at your option) | |
15 | * any later version. | |
16 | * | |
17 | * The SCTP reference implementation is distributed in the hope that it | |
18 | * will be useful, but WITHOUT ANY WARRANTY; without even the implied | |
19 | * ************************ | |
20 | * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. | |
21 | * See the GNU General Public License for more details. | |
22 | * | |
23 | * You should have received a copy of the GNU General Public License | |
24 | * along with GNU CC; see the file COPYING. If not, write to | |
25 | * the Free Software Foundation, 59 Temple Place - Suite 330, | |
26 | * Boston, MA 02111-1307, USA. | |
27 | * | |
28 | * Please send any bug reports or fixes you make to the | |
29 | * email address(es): | |
30 | * lksctp developers <lksctp-developers@lists.sourceforge.net> | |
31 | * | |
32 | * Or submit a bug report through the following website: | |
33 | * http://www.sf.net/projects/lksctp | |
34 | * | |
35 | * Written or modified by: | |
36 | * Le Yanqun <yanqun.le@nokia.com> | |
37 | * Hui Huang <hui.huang@nokia.com> | |
38 | * La Monte H.P. Yarroll <piggy@acm.org> | |
39 | * Sridhar Samudrala <sri@us.ibm.com> | |
40 | * Jon Grimm <jgrimm@us.ibm.com> | |
41 | * Ardelle Fan <ardelle.fan@intel.com> | |
42 | * | |
43 | * Based on: | |
44 | * linux/net/ipv6/tcp_ipv6.c | |
45 | * | |
46 | * Any bugs reported given to us we will try to fix... any fixes shared will | |
47 | * be incorporated into the next SCTP release. | |
48 | */ | |
49 | ||
50 | #include <linux/module.h> | |
51 | #include <linux/errno.h> | |
52 | #include <linux/types.h> | |
53 | #include <linux/socket.h> | |
54 | #include <linux/sockios.h> | |
55 | #include <linux/net.h> | |
1da177e4 LT |
56 | #include <linux/in.h> |
57 | #include <linux/in6.h> | |
58 | #include <linux/netdevice.h> | |
59 | #include <linux/init.h> | |
60 | #include <linux/ipsec.h> | |
61 | ||
62 | #include <linux/ipv6.h> | |
63 | #include <linux/icmpv6.h> | |
64 | #include <linux/random.h> | |
65 | #include <linux/seq_file.h> | |
66 | ||
67 | #include <net/protocol.h> | |
1da177e4 | 68 | #include <net/ndisc.h> |
c752f073 | 69 | #include <net/ip.h> |
1da177e4 LT |
70 | #include <net/ipv6.h> |
71 | #include <net/transp_v6.h> | |
72 | #include <net/addrconf.h> | |
73 | #include <net/ip6_route.h> | |
74 | #include <net/inet_common.h> | |
75 | #include <net/inet_ecn.h> | |
76 | #include <net/sctp/sctp.h> | |
77 | ||
78 | #include <asm/uaccess.h> | |
79 | ||
29303547 VY |
80 | /* Event handler for inet6 address addition/deletion events. |
81 | * The sctp_local_addr_list needs to be protocted by a spin lock since | |
82 | * multiple notifiers (say IPv4 and IPv6) may be running at the same | |
83 | * time and thus corrupt the list. | |
84 | * The reader side is protected with RCU. | |
85 | */ | |
24123186 AB |
86 | static int sctp_inet6addr_event(struct notifier_block *this, unsigned long ev, |
87 | void *ptr) | |
29c7cf96 SS |
88 | { |
89 | struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr; | |
29303547 VY |
90 | struct sctp_sockaddr_entry *addr = NULL; |
91 | struct sctp_sockaddr_entry *temp; | |
29c7cf96 SS |
92 | |
93 | switch (ev) { | |
94 | case NETDEV_UP: | |
95 | addr = kmalloc(sizeof(struct sctp_sockaddr_entry), GFP_ATOMIC); | |
96 | if (addr) { | |
97 | addr->a.v6.sin6_family = AF_INET6; | |
98 | addr->a.v6.sin6_port = 0; | |
99 | memcpy(&addr->a.v6.sin6_addr, &ifa->addr, | |
100 | sizeof(struct in6_addr)); | |
101 | addr->a.v6.sin6_scope_id = ifa->idev->dev->ifindex; | |
29303547 VY |
102 | addr->valid = 1; |
103 | spin_lock_bh(&sctp_local_addr_lock); | |
104 | list_add_tail_rcu(&addr->list, &sctp_local_addr_list); | |
105 | spin_unlock_bh(&sctp_local_addr_lock); | |
29c7cf96 SS |
106 | } |
107 | break; | |
108 | case NETDEV_DOWN: | |
29303547 VY |
109 | spin_lock_bh(&sctp_local_addr_lock); |
110 | list_for_each_entry_safe(addr, temp, | |
111 | &sctp_local_addr_list, list) { | |
112 | if (ipv6_addr_equal(&addr->a.v6.sin6_addr, | |
113 | &ifa->addr)) { | |
114 | addr->valid = 0; | |
115 | list_del_rcu(&addr->list); | |
29c7cf96 SS |
116 | break; |
117 | } | |
118 | } | |
29303547 VY |
119 | spin_unlock_bh(&sctp_local_addr_lock); |
120 | if (addr && !addr->valid) | |
121 | call_rcu(&addr->rcu, sctp_local_addr_free); | |
29c7cf96 SS |
122 | break; |
123 | } | |
124 | ||
125 | return NOTIFY_DONE; | |
126 | } | |
127 | ||
1da177e4 | 128 | static struct notifier_block sctp_inet6addr_notifier = { |
29c7cf96 | 129 | .notifier_call = sctp_inet6addr_event, |
1da177e4 LT |
130 | }; |
131 | ||
132 | /* ICMP error handler. */ | |
133 | SCTP_STATIC void sctp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt, | |
04ce6909 | 134 | int type, int code, int offset, __be32 info) |
1da177e4 LT |
135 | { |
136 | struct inet6_dev *idev; | |
1da177e4 | 137 | struct sock *sk; |
1da177e4 LT |
138 | struct sctp_association *asoc; |
139 | struct sctp_transport *transport; | |
140 | struct ipv6_pinfo *np; | |
2e07fa9c | 141 | sk_buff_data_t saveip, savesctp; |
1da177e4 LT |
142 | int err; |
143 | ||
144 | idev = in6_dev_get(skb->dev); | |
145 | ||
146 | /* Fix up skb to look at the embedded net header. */ | |
b0e380b1 ACM |
147 | saveip = skb->network_header; |
148 | savesctp = skb->transport_header; | |
1ced98e8 | 149 | skb_reset_network_header(skb); |
a27ef749 ACM |
150 | skb_set_transport_header(skb, offset); |
151 | sk = sctp_err_lookup(AF_INET6, skb, sctp_hdr(skb), &asoc, &transport); | |
1da177e4 | 152 | /* Put back, the original pointers. */ |
b0e380b1 ACM |
153 | skb->network_header = saveip; |
154 | skb->transport_header = savesctp; | |
1da177e4 LT |
155 | if (!sk) { |
156 | ICMP6_INC_STATS_BH(idev, ICMP6_MIB_INERRORS); | |
157 | goto out; | |
158 | } | |
159 | ||
160 | /* Warning: The sock lock is held. Remember to call | |
161 | * sctp_err_finish! | |
162 | */ | |
163 | ||
164 | switch (type) { | |
165 | case ICMPV6_PKT_TOOBIG: | |
166 | sctp_icmp_frag_needed(sk, asoc, transport, ntohl(info)); | |
167 | goto out_unlock; | |
168 | case ICMPV6_PARAMPROB: | |
169 | if (ICMPV6_UNK_NEXTHDR == code) { | |
d1ad1ff2 | 170 | sctp_icmp_proto_unreachable(sk, asoc, transport); |
1da177e4 LT |
171 | goto out_unlock; |
172 | } | |
173 | break; | |
174 | default: | |
175 | break; | |
176 | } | |
177 | ||
178 | np = inet6_sk(sk); | |
179 | icmpv6_err_convert(type, code, &err); | |
180 | if (!sock_owned_by_user(sk) && np->recverr) { | |
181 | sk->sk_err = err; | |
182 | sk->sk_error_report(sk); | |
183 | } else { /* Only an error on timeout */ | |
184 | sk->sk_err_soft = err; | |
185 | } | |
186 | ||
187 | out_unlock: | |
d1ad1ff2 | 188 | sctp_err_finish(sk, asoc); |
1da177e4 LT |
189 | out: |
190 | if (likely(idev != NULL)) | |
191 | in6_dev_put(idev); | |
192 | } | |
193 | ||
194 | /* Based on tcp_v6_xmit() in tcp_ipv6.c. */ | |
195 | static int sctp_v6_xmit(struct sk_buff *skb, struct sctp_transport *transport, | |
196 | int ipfragok) | |
197 | { | |
198 | struct sock *sk = skb->sk; | |
199 | struct ipv6_pinfo *np = inet6_sk(sk); | |
200 | struct flowi fl; | |
201 | ||
202 | memset(&fl, 0, sizeof(fl)); | |
203 | ||
204 | fl.proto = sk->sk_protocol; | |
205 | ||
206 | /* Fill in the dest address from the route entry passed with the skb | |
207 | * and the source address from the transport. | |
208 | */ | |
b3f5b3b6 | 209 | ipv6_addr_copy(&fl.fl6_dst, &transport->ipaddr.v6.sin6_addr); |
a9266268 | 210 | ipv6_addr_copy(&fl.fl6_src, &transport->saddr.v6.sin6_addr); |
1da177e4 LT |
211 | |
212 | fl.fl6_flowlabel = np->flow_label; | |
213 | IP6_ECN_flow_xmit(sk, fl.fl6_flowlabel); | |
214 | if (ipv6_addr_type(&fl.fl6_src) & IPV6_ADDR_LINKLOCAL) | |
a9266268 | 215 | fl.oif = transport->saddr.v6.sin6_scope_id; |
1da177e4 LT |
216 | else |
217 | fl.oif = sk->sk_bound_dev_if; | |
1da177e4 LT |
218 | |
219 | if (np->opt && np->opt->srcrt) { | |
220 | struct rt0_hdr *rt0 = (struct rt0_hdr *) np->opt->srcrt; | |
221 | ipv6_addr_copy(&fl.fl6_dst, rt0->addr); | |
222 | } | |
223 | ||
224 | SCTP_DEBUG_PRINTK("%s: skb:%p, len:%d, " | |
46b86a2d | 225 | "src:" NIP6_FMT " dst:" NIP6_FMT "\n", |
1da177e4 LT |
226 | __FUNCTION__, skb, skb->len, |
227 | NIP6(fl.fl6_src), NIP6(fl.fl6_dst)); | |
228 | ||
229 | SCTP_INC_STATS(SCTP_MIB_OUTSCTPPACKS); | |
230 | ||
231 | return ip6_xmit(sk, skb, &fl, np->opt, ipfragok); | |
232 | } | |
233 | ||
234 | /* Returns the dst cache entry for the given source and destination ip | |
235 | * addresses. | |
236 | */ | |
237 | static struct dst_entry *sctp_v6_get_dst(struct sctp_association *asoc, | |
238 | union sctp_addr *daddr, | |
239 | union sctp_addr *saddr) | |
240 | { | |
241 | struct dst_entry *dst; | |
242 | struct flowi fl; | |
243 | ||
244 | memset(&fl, 0, sizeof(fl)); | |
245 | ipv6_addr_copy(&fl.fl6_dst, &daddr->v6.sin6_addr); | |
246 | if (ipv6_addr_type(&daddr->v6.sin6_addr) & IPV6_ADDR_LINKLOCAL) | |
247 | fl.oif = daddr->v6.sin6_scope_id; | |
d808ad9a | 248 | |
1da177e4 | 249 | |
46b86a2d | 250 | SCTP_DEBUG_PRINTK("%s: DST=" NIP6_FMT " ", |
1da177e4 LT |
251 | __FUNCTION__, NIP6(fl.fl6_dst)); |
252 | ||
253 | if (saddr) { | |
254 | ipv6_addr_copy(&fl.fl6_src, &saddr->v6.sin6_addr); | |
255 | SCTP_DEBUG_PRINTK( | |
46b86a2d | 256 | "SRC=" NIP6_FMT " - ", |
1da177e4 LT |
257 | NIP6(fl.fl6_src)); |
258 | } | |
259 | ||
260 | dst = ip6_route_output(NULL, &fl); | |
4251320f | 261 | if (!dst->error) { |
1da177e4 LT |
262 | struct rt6_info *rt; |
263 | rt = (struct rt6_info *)dst; | |
264 | SCTP_DEBUG_PRINTK( | |
46b86a2d | 265 | "rt6_dst:" NIP6_FMT " rt6_src:" NIP6_FMT "\n", |
1da177e4 | 266 | NIP6(rt->rt6i_dst.addr), NIP6(rt->rt6i_src.addr)); |
4251320f | 267 | return dst; |
1da177e4 | 268 | } |
4251320f VN |
269 | SCTP_DEBUG_PRINTK("NO ROUTE\n"); |
270 | dst_release(dst); | |
271 | return NULL; | |
1da177e4 LT |
272 | } |
273 | ||
274 | /* Returns the number of consecutive initial bits that match in the 2 ipv6 | |
275 | * addresses. | |
276 | */ | |
277 | static inline int sctp_v6_addr_match_len(union sctp_addr *s1, | |
278 | union sctp_addr *s2) | |
279 | { | |
280 | struct in6_addr *a1 = &s1->v6.sin6_addr; | |
281 | struct in6_addr *a2 = &s2->v6.sin6_addr; | |
282 | int i, j; | |
283 | ||
284 | for (i = 0; i < 4 ; i++) { | |
dbc16db1 | 285 | __be32 a1xora2; |
1da177e4 LT |
286 | |
287 | a1xora2 = a1->s6_addr32[i] ^ a2->s6_addr32[i]; | |
288 | ||
289 | if ((j = fls(ntohl(a1xora2)))) | |
290 | return (i * 32 + 32 - j); | |
291 | } | |
292 | ||
293 | return (i*32); | |
294 | } | |
295 | ||
296 | /* Fills in the source address(saddr) based on the destination address(daddr) | |
297 | * and asoc's bind address list. | |
298 | */ | |
299 | static void sctp_v6_get_saddr(struct sctp_association *asoc, | |
300 | struct dst_entry *dst, | |
301 | union sctp_addr *daddr, | |
302 | union sctp_addr *saddr) | |
303 | { | |
304 | struct sctp_bind_addr *bp; | |
1da177e4 | 305 | struct sctp_sockaddr_entry *laddr; |
1da177e4 LT |
306 | sctp_scope_t scope; |
307 | union sctp_addr *baddr = NULL; | |
308 | __u8 matchlen = 0; | |
309 | __u8 bmatchlen; | |
310 | ||
311 | SCTP_DEBUG_PRINTK("%s: asoc:%p dst:%p " | |
46b86a2d | 312 | "daddr:" NIP6_FMT " ", |
1da177e4 LT |
313 | __FUNCTION__, asoc, dst, NIP6(daddr->v6.sin6_addr)); |
314 | ||
315 | if (!asoc) { | |
316 | ipv6_get_saddr(dst, &daddr->v6.sin6_addr,&saddr->v6.sin6_addr); | |
46b86a2d | 317 | SCTP_DEBUG_PRINTK("saddr from ipv6_get_saddr: " NIP6_FMT "\n", |
1da177e4 LT |
318 | NIP6(saddr->v6.sin6_addr)); |
319 | return; | |
320 | } | |
321 | ||
322 | scope = sctp_scope(daddr); | |
323 | ||
324 | bp = &asoc->base.bind_addr; | |
1da177e4 LT |
325 | |
326 | /* Go through the bind address list and find the best source address | |
327 | * that matches the scope of the destination address. | |
328 | */ | |
559cf710 VY |
329 | rcu_read_lock(); |
330 | list_for_each_entry_rcu(laddr, &bp->address_list, list) { | |
331 | if (!laddr->valid) | |
332 | continue; | |
dc022a98 | 333 | if ((laddr->use_as_src) && |
6244be4e AV |
334 | (laddr->a.sa.sa_family == AF_INET6) && |
335 | (scope <= sctp_scope(&laddr->a))) { | |
d3f7a54a | 336 | bmatchlen = sctp_v6_addr_match_len(daddr, &laddr->a); |
1da177e4 | 337 | if (!baddr || (matchlen < bmatchlen)) { |
d3f7a54a | 338 | baddr = &laddr->a; |
1da177e4 LT |
339 | matchlen = bmatchlen; |
340 | } | |
341 | } | |
342 | } | |
343 | ||
344 | if (baddr) { | |
345 | memcpy(saddr, baddr, sizeof(union sctp_addr)); | |
46b86a2d | 346 | SCTP_DEBUG_PRINTK("saddr: " NIP6_FMT "\n", |
1da177e4 LT |
347 | NIP6(saddr->v6.sin6_addr)); |
348 | } else { | |
349 | printk(KERN_ERR "%s: asoc:%p Could not find a valid source " | |
46b86a2d | 350 | "address for the dest:" NIP6_FMT "\n", |
1da177e4 LT |
351 | __FUNCTION__, asoc, NIP6(daddr->v6.sin6_addr)); |
352 | } | |
353 | ||
559cf710 | 354 | rcu_read_unlock(); |
1da177e4 LT |
355 | } |
356 | ||
357 | /* Make a copy of all potential local addresses. */ | |
358 | static void sctp_v6_copy_addrlist(struct list_head *addrlist, | |
359 | struct net_device *dev) | |
360 | { | |
361 | struct inet6_dev *in6_dev; | |
362 | struct inet6_ifaddr *ifp; | |
363 | struct sctp_sockaddr_entry *addr; | |
364 | ||
8814c4b5 | 365 | rcu_read_lock(); |
1da177e4 | 366 | if ((in6_dev = __in6_dev_get(dev)) == NULL) { |
8814c4b5 | 367 | rcu_read_unlock(); |
1da177e4 LT |
368 | return; |
369 | } | |
370 | ||
e2eb8d45 | 371 | read_lock_bh(&in6_dev->lock); |
1da177e4 LT |
372 | for (ifp = in6_dev->addr_list; ifp; ifp = ifp->if_next) { |
373 | /* Add the address to the local list. */ | |
374 | addr = t_new(struct sctp_sockaddr_entry, GFP_ATOMIC); | |
375 | if (addr) { | |
2a6fd78a AV |
376 | addr->a.v6.sin6_family = AF_INET6; |
377 | addr->a.v6.sin6_port = 0; | |
378 | addr->a.v6.sin6_addr = ifp->addr; | |
379 | addr->a.v6.sin6_scope_id = dev->ifindex; | |
29303547 | 380 | addr->valid = 1; |
1da177e4 | 381 | INIT_LIST_HEAD(&addr->list); |
29303547 | 382 | INIT_RCU_HEAD(&addr->rcu); |
1da177e4 LT |
383 | list_add_tail(&addr->list, addrlist); |
384 | } | |
385 | } | |
386 | ||
e2eb8d45 | 387 | read_unlock_bh(&in6_dev->lock); |
8814c4b5 | 388 | rcu_read_unlock(); |
1da177e4 LT |
389 | } |
390 | ||
391 | /* Initialize a sockaddr_storage from in incoming skb. */ | |
392 | static void sctp_v6_from_skb(union sctp_addr *addr,struct sk_buff *skb, | |
393 | int is_saddr) | |
394 | { | |
395 | void *from; | |
d55c41b1 | 396 | __be16 *port; |
1da177e4 LT |
397 | struct sctphdr *sh; |
398 | ||
399 | port = &addr->v6.sin6_port; | |
400 | addr->v6.sin6_family = AF_INET6; | |
401 | addr->v6.sin6_flowinfo = 0; /* FIXME */ | |
402 | addr->v6.sin6_scope_id = ((struct inet6_skb_parm *)skb->cb)->iif; | |
403 | ||
2c0fd387 | 404 | sh = sctp_hdr(skb); |
1da177e4 | 405 | if (is_saddr) { |
d55c41b1 | 406 | *port = sh->source; |
0660e03f | 407 | from = &ipv6_hdr(skb)->saddr; |
1da177e4 | 408 | } else { |
d55c41b1 | 409 | *port = sh->dest; |
0660e03f | 410 | from = &ipv6_hdr(skb)->daddr; |
1da177e4 LT |
411 | } |
412 | ipv6_addr_copy(&addr->v6.sin6_addr, from); | |
413 | } | |
414 | ||
415 | /* Initialize an sctp_addr from a socket. */ | |
416 | static void sctp_v6_from_sk(union sctp_addr *addr, struct sock *sk) | |
417 | { | |
418 | addr->v6.sin6_family = AF_INET6; | |
7dcdbd95 | 419 | addr->v6.sin6_port = 0; |
1da177e4 LT |
420 | addr->v6.sin6_addr = inet6_sk(sk)->rcv_saddr; |
421 | } | |
422 | ||
423 | /* Initialize sk->sk_rcv_saddr from sctp_addr. */ | |
424 | static void sctp_v6_to_sk_saddr(union sctp_addr *addr, struct sock *sk) | |
425 | { | |
426 | if (addr->sa.sa_family == AF_INET && sctp_sk(sk)->v4mapped) { | |
427 | inet6_sk(sk)->rcv_saddr.s6_addr32[0] = 0; | |
428 | inet6_sk(sk)->rcv_saddr.s6_addr32[1] = 0; | |
429 | inet6_sk(sk)->rcv_saddr.s6_addr32[2] = htonl(0x0000ffff); | |
430 | inet6_sk(sk)->rcv_saddr.s6_addr32[3] = | |
431 | addr->v4.sin_addr.s_addr; | |
432 | } else { | |
433 | inet6_sk(sk)->rcv_saddr = addr->v6.sin6_addr; | |
434 | } | |
435 | } | |
436 | ||
437 | /* Initialize sk->sk_daddr from sctp_addr. */ | |
438 | static void sctp_v6_to_sk_daddr(union sctp_addr *addr, struct sock *sk) | |
439 | { | |
440 | if (addr->sa.sa_family == AF_INET && sctp_sk(sk)->v4mapped) { | |
441 | inet6_sk(sk)->daddr.s6_addr32[0] = 0; | |
442 | inet6_sk(sk)->daddr.s6_addr32[1] = 0; | |
443 | inet6_sk(sk)->daddr.s6_addr32[2] = htonl(0x0000ffff); | |
444 | inet6_sk(sk)->daddr.s6_addr32[3] = addr->v4.sin_addr.s_addr; | |
445 | } else { | |
446 | inet6_sk(sk)->daddr = addr->v6.sin6_addr; | |
447 | } | |
448 | } | |
449 | ||
450 | /* Initialize a sctp_addr from an address parameter. */ | |
451 | static void sctp_v6_from_addr_param(union sctp_addr *addr, | |
452 | union sctp_addr_param *param, | |
dd86d136 | 453 | __be16 port, int iif) |
1da177e4 LT |
454 | { |
455 | addr->v6.sin6_family = AF_INET6; | |
456 | addr->v6.sin6_port = port; | |
457 | addr->v6.sin6_flowinfo = 0; /* BUG */ | |
458 | ipv6_addr_copy(&addr->v6.sin6_addr, ¶m->v6.addr); | |
459 | addr->v6.sin6_scope_id = iif; | |
460 | } | |
461 | ||
462 | /* Initialize an address parameter from a sctp_addr and return the length | |
463 | * of the address parameter. | |
464 | */ | |
465 | static int sctp_v6_to_addr_param(const union sctp_addr *addr, | |
466 | union sctp_addr_param *param) | |
467 | { | |
468 | int length = sizeof(sctp_ipv6addr_param_t); | |
469 | ||
470 | param->v6.param_hdr.type = SCTP_PARAM_IPV6_ADDRESS; | |
dbc16db1 | 471 | param->v6.param_hdr.length = htons(length); |
1da177e4 LT |
472 | ipv6_addr_copy(¶m->v6.addr, &addr->v6.sin6_addr); |
473 | ||
474 | return length; | |
475 | } | |
476 | ||
477 | /* Initialize a sctp_addr from a dst_entry. */ | |
478 | static void sctp_v6_dst_saddr(union sctp_addr *addr, struct dst_entry *dst, | |
854d43a4 | 479 | __be16 port) |
1da177e4 LT |
480 | { |
481 | struct rt6_info *rt = (struct rt6_info *)dst; | |
482 | addr->sa.sa_family = AF_INET6; | |
483 | addr->v6.sin6_port = port; | |
484 | ipv6_addr_copy(&addr->v6.sin6_addr, &rt->rt6i_src.addr); | |
485 | } | |
486 | ||
487 | /* Compare addresses exactly. | |
488 | * v4-mapped-v6 is also in consideration. | |
489 | */ | |
490 | static int sctp_v6_cmp_addr(const union sctp_addr *addr1, | |
491 | const union sctp_addr *addr2) | |
492 | { | |
493 | if (addr1->sa.sa_family != addr2->sa.sa_family) { | |
494 | if (addr1->sa.sa_family == AF_INET && | |
495 | addr2->sa.sa_family == AF_INET6 && | |
e773e4fa | 496 | ipv6_addr_v4mapped(&addr2->v6.sin6_addr)) { |
1da177e4 LT |
497 | if (addr2->v6.sin6_port == addr1->v4.sin_port && |
498 | addr2->v6.sin6_addr.s6_addr32[3] == | |
499 | addr1->v4.sin_addr.s_addr) | |
500 | return 1; | |
501 | } | |
502 | if (addr2->sa.sa_family == AF_INET && | |
503 | addr1->sa.sa_family == AF_INET6 && | |
e773e4fa | 504 | ipv6_addr_v4mapped(&addr1->v6.sin6_addr)) { |
1da177e4 LT |
505 | if (addr1->v6.sin6_port == addr2->v4.sin_port && |
506 | addr1->v6.sin6_addr.s6_addr32[3] == | |
507 | addr2->v4.sin_addr.s_addr) | |
508 | return 1; | |
509 | } | |
510 | return 0; | |
511 | } | |
512 | if (!ipv6_addr_equal(&addr1->v6.sin6_addr, &addr2->v6.sin6_addr)) | |
513 | return 0; | |
514 | /* If this is a linklocal address, compare the scope_id. */ | |
515 | if (ipv6_addr_type(&addr1->v6.sin6_addr) & IPV6_ADDR_LINKLOCAL) { | |
516 | if (addr1->v6.sin6_scope_id && addr2->v6.sin6_scope_id && | |
517 | (addr1->v6.sin6_scope_id != addr2->v6.sin6_scope_id)) { | |
518 | return 0; | |
519 | } | |
520 | } | |
521 | ||
522 | return 1; | |
523 | } | |
524 | ||
525 | /* Initialize addr struct to INADDR_ANY. */ | |
6fbfa9f9 | 526 | static void sctp_v6_inaddr_any(union sctp_addr *addr, __be16 port) |
1da177e4 LT |
527 | { |
528 | memset(addr, 0x00, sizeof(union sctp_addr)); | |
529 | addr->v6.sin6_family = AF_INET6; | |
530 | addr->v6.sin6_port = port; | |
531 | } | |
532 | ||
533 | /* Is this a wildcard address? */ | |
534 | static int sctp_v6_is_any(const union sctp_addr *addr) | |
535 | { | |
b9b9e10f | 536 | return ipv6_addr_any(&addr->v6.sin6_addr); |
1da177e4 LT |
537 | } |
538 | ||
539 | /* Should this be available for binding? */ | |
540 | static int sctp_v6_available(union sctp_addr *addr, struct sctp_sock *sp) | |
541 | { | |
542 | int type; | |
543 | struct in6_addr *in6 = (struct in6_addr *)&addr->v6.sin6_addr; | |
544 | ||
545 | type = ipv6_addr_type(in6); | |
546 | if (IPV6_ADDR_ANY == type) | |
547 | return 1; | |
548 | if (type == IPV6_ADDR_MAPPED) { | |
549 | if (sp && !sp->v4mapped) | |
550 | return 0; | |
551 | if (sp && ipv6_only_sock(sctp_opt2sk(sp))) | |
552 | return 0; | |
553 | sctp_v6_map_v4(addr); | |
554 | return sctp_get_af_specific(AF_INET)->available(addr, sp); | |
555 | } | |
556 | if (!(type & IPV6_ADDR_UNICAST)) | |
557 | return 0; | |
558 | ||
559 | return ipv6_chk_addr(in6, NULL, 0); | |
560 | } | |
561 | ||
562 | /* This function checks if the address is a valid address to be used for | |
563 | * SCTP. | |
564 | * | |
565 | * Output: | |
566 | * Return 0 - If the address is a non-unicast or an illegal address. | |
567 | * Return 1 - If the address is a unicast. | |
568 | */ | |
5636bef7 VY |
569 | static int sctp_v6_addr_valid(union sctp_addr *addr, |
570 | struct sctp_sock *sp, | |
571 | const struct sk_buff *skb) | |
1da177e4 LT |
572 | { |
573 | int ret = ipv6_addr_type(&addr->v6.sin6_addr); | |
574 | ||
575 | /* Support v4-mapped-v6 address. */ | |
576 | if (ret == IPV6_ADDR_MAPPED) { | |
577 | /* Note: This routine is used in input, so v4-mapped-v6 | |
578 | * are disallowed here when there is no sctp_sock. | |
579 | */ | |
580 | if (!sp || !sp->v4mapped) | |
581 | return 0; | |
582 | if (sp && ipv6_only_sock(sctp_opt2sk(sp))) | |
583 | return 0; | |
584 | sctp_v6_map_v4(addr); | |
5636bef7 | 585 | return sctp_get_af_specific(AF_INET)->addr_valid(addr, sp, skb); |
1da177e4 LT |
586 | } |
587 | ||
588 | /* Is this a non-unicast address */ | |
589 | if (!(ret & IPV6_ADDR_UNICAST)) | |
590 | return 0; | |
591 | ||
592 | return 1; | |
593 | } | |
594 | ||
595 | /* What is the scope of 'addr'? */ | |
596 | static sctp_scope_t sctp_v6_scope(union sctp_addr *addr) | |
597 | { | |
598 | int v6scope; | |
599 | sctp_scope_t retval; | |
600 | ||
601 | /* The IPv6 scope is really a set of bit fields. | |
602 | * See IFA_* in <net/if_inet6.h>. Map to a generic SCTP scope. | |
603 | */ | |
604 | ||
605 | v6scope = ipv6_addr_scope(&addr->v6.sin6_addr); | |
606 | switch (v6scope) { | |
607 | case IFA_HOST: | |
608 | retval = SCTP_SCOPE_LOOPBACK; | |
609 | break; | |
610 | case IFA_LINK: | |
611 | retval = SCTP_SCOPE_LINK; | |
612 | break; | |
613 | case IFA_SITE: | |
614 | retval = SCTP_SCOPE_PRIVATE; | |
615 | break; | |
616 | default: | |
617 | retval = SCTP_SCOPE_GLOBAL; | |
618 | break; | |
3ff50b79 | 619 | } |
1da177e4 LT |
620 | |
621 | return retval; | |
622 | } | |
623 | ||
624 | /* Create and initialize a new sk for the socket to be returned by accept(). */ | |
625 | static struct sock *sctp_v6_create_accept_sk(struct sock *sk, | |
626 | struct sctp_association *asoc) | |
627 | { | |
628 | struct inet_sock *inet = inet_sk(sk); | |
629 | struct sock *newsk; | |
630 | struct inet_sock *newinet; | |
631 | struct ipv6_pinfo *newnp, *np = inet6_sk(sk); | |
632 | struct sctp6_sock *newsctp6sk; | |
633 | ||
1b8d7ae4 | 634 | newsk = sk_alloc(sk->sk_net, PF_INET6, GFP_KERNEL, sk->sk_prot, 1); |
1da177e4 LT |
635 | if (!newsk) |
636 | goto out; | |
637 | ||
638 | sock_init_data(NULL, newsk); | |
639 | ||
640 | newsk->sk_type = SOCK_STREAM; | |
641 | ||
642 | newsk->sk_prot = sk->sk_prot; | |
643 | newsk->sk_no_check = sk->sk_no_check; | |
644 | newsk->sk_reuse = sk->sk_reuse; | |
645 | ||
646 | newsk->sk_destruct = inet_sock_destruct; | |
647 | newsk->sk_family = PF_INET6; | |
648 | newsk->sk_protocol = IPPROTO_SCTP; | |
649 | newsk->sk_backlog_rcv = sk->sk_prot->backlog_rcv; | |
650 | newsk->sk_shutdown = sk->sk_shutdown; | |
651 | sock_reset_flag(sk, SOCK_ZAPPED); | |
652 | ||
653 | newsctp6sk = (struct sctp6_sock *)newsk; | |
654 | inet_sk(newsk)->pinet6 = &newsctp6sk->inet6; | |
655 | ||
b225b884 DJ |
656 | sctp_sk(newsk)->v4mapped = sctp_sk(sk)->v4mapped; |
657 | ||
1da177e4 LT |
658 | newinet = inet_sk(newsk); |
659 | newnp = inet6_sk(newsk); | |
660 | ||
661 | memcpy(newnp, np, sizeof(struct ipv6_pinfo)); | |
662 | ||
663 | /* Initialize sk's sport, dport, rcv_saddr and daddr for getsockname() | |
664 | * and getpeername(). | |
665 | */ | |
666 | newinet->sport = inet->sport; | |
667 | newnp->saddr = np->saddr; | |
668 | newnp->rcv_saddr = np->rcv_saddr; | |
669 | newinet->dport = htons(asoc->peer.port); | |
670 | sctp_v6_to_sk_daddr(&asoc->peer.primary_addr, newsk); | |
671 | ||
672 | /* Init the ipv4 part of the socket since we can have sockets | |
673 | * using v6 API for ipv4. | |
674 | */ | |
675 | newinet->uc_ttl = -1; | |
676 | newinet->mc_loop = 1; | |
677 | newinet->mc_ttl = 1; | |
678 | newinet->mc_index = 0; | |
679 | newinet->mc_list = NULL; | |
680 | ||
681 | if (ipv4_config.no_pmtu_disc) | |
682 | newinet->pmtudisc = IP_PMTUDISC_DONT; | |
683 | else | |
684 | newinet->pmtudisc = IP_PMTUDISC_WANT; | |
685 | ||
e6848976 | 686 | sk_refcnt_debug_inc(newsk); |
1da177e4 LT |
687 | |
688 | if (newsk->sk_prot->init(newsk)) { | |
689 | sk_common_release(newsk); | |
690 | newsk = NULL; | |
691 | } | |
692 | ||
693 | out: | |
694 | return newsk; | |
695 | } | |
696 | ||
697 | /* Map v4 address to mapped v6 address */ | |
698 | static void sctp_v6_addr_v4map(struct sctp_sock *sp, union sctp_addr *addr) | |
699 | { | |
700 | if (sp->v4mapped && AF_INET == addr->sa.sa_family) | |
701 | sctp_v4_map_v6(addr); | |
702 | } | |
703 | ||
704 | /* Where did this skb come from? */ | |
705 | static int sctp_v6_skb_iif(const struct sk_buff *skb) | |
706 | { | |
707 | struct inet6_skb_parm *opt = (struct inet6_skb_parm *) skb->cb; | |
708 | return opt->iif; | |
709 | } | |
710 | ||
711 | /* Was this packet marked by Explicit Congestion Notification? */ | |
712 | static int sctp_v6_is_ce(const struct sk_buff *skb) | |
713 | { | |
0660e03f | 714 | return *((__u32 *)(ipv6_hdr(skb))) & htonl(1 << 20); |
1da177e4 LT |
715 | } |
716 | ||
717 | /* Dump the v6 addr to the seq file. */ | |
718 | static void sctp_v6_seq_dump_addr(struct seq_file *seq, union sctp_addr *addr) | |
719 | { | |
46b86a2d | 720 | seq_printf(seq, NIP6_FMT " ", NIP6(addr->v6.sin6_addr)); |
1da177e4 LT |
721 | } |
722 | ||
723 | /* Initialize a PF_INET6 socket msg_name. */ | |
724 | static void sctp_inet6_msgname(char *msgname, int *addr_len) | |
725 | { | |
726 | struct sockaddr_in6 *sin6; | |
727 | ||
728 | sin6 = (struct sockaddr_in6 *)msgname; | |
729 | sin6->sin6_family = AF_INET6; | |
730 | sin6->sin6_flowinfo = 0; | |
731 | sin6->sin6_scope_id = 0; /*FIXME */ | |
732 | *addr_len = sizeof(struct sockaddr_in6); | |
733 | } | |
734 | ||
735 | /* Initialize a PF_INET msgname from a ulpevent. */ | |
736 | static void sctp_inet6_event_msgname(struct sctp_ulpevent *event, | |
737 | char *msgname, int *addrlen) | |
738 | { | |
739 | struct sockaddr_in6 *sin6, *sin6from; | |
740 | ||
741 | if (msgname) { | |
742 | union sctp_addr *addr; | |
743 | struct sctp_association *asoc; | |
744 | ||
745 | asoc = event->asoc; | |
746 | sctp_inet6_msgname(msgname, addrlen); | |
747 | sin6 = (struct sockaddr_in6 *)msgname; | |
748 | sin6->sin6_port = htons(asoc->peer.port); | |
749 | addr = &asoc->peer.primary_addr; | |
750 | ||
751 | /* Note: If we go to a common v6 format, this code | |
752 | * will change. | |
753 | */ | |
754 | ||
755 | /* Map ipv4 address into v4-mapped-on-v6 address. */ | |
756 | if (sctp_sk(asoc->base.sk)->v4mapped && | |
757 | AF_INET == addr->sa.sa_family) { | |
758 | sctp_v4_map_v6((union sctp_addr *)sin6); | |
759 | sin6->sin6_addr.s6_addr32[3] = | |
760 | addr->v4.sin_addr.s_addr; | |
761 | return; | |
762 | } | |
763 | ||
764 | sin6from = &asoc->peer.primary_addr.v6; | |
765 | ipv6_addr_copy(&sin6->sin6_addr, &sin6from->sin6_addr); | |
766 | if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) | |
767 | sin6->sin6_scope_id = sin6from->sin6_scope_id; | |
768 | } | |
769 | } | |
770 | ||
771 | /* Initialize a msg_name from an inbound skb. */ | |
772 | static void sctp_inet6_skb_msgname(struct sk_buff *skb, char *msgname, | |
773 | int *addr_len) | |
774 | { | |
775 | struct sctphdr *sh; | |
776 | struct sockaddr_in6 *sin6; | |
777 | ||
778 | if (msgname) { | |
779 | sctp_inet6_msgname(msgname, addr_len); | |
780 | sin6 = (struct sockaddr_in6 *)msgname; | |
2c0fd387 | 781 | sh = sctp_hdr(skb); |
1da177e4 LT |
782 | sin6->sin6_port = sh->source; |
783 | ||
784 | /* Map ipv4 address into v4-mapped-on-v6 address. */ | |
785 | if (sctp_sk(skb->sk)->v4mapped && | |
eddc9ec5 | 786 | ip_hdr(skb)->version == 4) { |
1da177e4 | 787 | sctp_v4_map_v6((union sctp_addr *)sin6); |
eddc9ec5 | 788 | sin6->sin6_addr.s6_addr32[3] = ip_hdr(skb)->saddr; |
1da177e4 LT |
789 | return; |
790 | } | |
791 | ||
792 | /* Otherwise, just copy the v6 address. */ | |
0660e03f | 793 | ipv6_addr_copy(&sin6->sin6_addr, &ipv6_hdr(skb)->saddr); |
1da177e4 LT |
794 | if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) { |
795 | struct sctp_ulpevent *ev = sctp_skb2event(skb); | |
796 | sin6->sin6_scope_id = ev->iif; | |
797 | } | |
798 | } | |
799 | } | |
800 | ||
801 | /* Do we support this AF? */ | |
802 | static int sctp_inet6_af_supported(sa_family_t family, struct sctp_sock *sp) | |
803 | { | |
804 | switch (family) { | |
805 | case AF_INET6: | |
806 | return 1; | |
807 | /* v4-mapped-v6 addresses */ | |
808 | case AF_INET: | |
809 | if (!__ipv6_only_sock(sctp_opt2sk(sp)) && sp->v4mapped) | |
810 | return 1; | |
811 | default: | |
812 | return 0; | |
813 | } | |
814 | } | |
815 | ||
816 | /* Address matching with wildcards allowed. This extra level | |
817 | * of indirection lets us choose whether a PF_INET6 should | |
818 | * disallow any v4 addresses if we so choose. | |
819 | */ | |
820 | static int sctp_inet6_cmp_addr(const union sctp_addr *addr1, | |
821 | const union sctp_addr *addr2, | |
822 | struct sctp_sock *opt) | |
823 | { | |
824 | struct sctp_af *af1, *af2; | |
825 | ||
826 | af1 = sctp_get_af_specific(addr1->sa.sa_family); | |
827 | af2 = sctp_get_af_specific(addr2->sa.sa_family); | |
828 | ||
829 | if (!af1 || !af2) | |
830 | return 0; | |
831 | /* Today, wildcard AF_INET/AF_INET6. */ | |
832 | if (sctp_is_any(addr1) || sctp_is_any(addr2)) | |
833 | return 1; | |
834 | ||
835 | if (addr1->sa.sa_family != addr2->sa.sa_family) | |
836 | return 0; | |
837 | ||
838 | return af1->cmp_addr(addr1, addr2); | |
839 | } | |
840 | ||
841 | /* Verify that the provided sockaddr looks bindable. Common verification, | |
842 | * has already been taken care of. | |
843 | */ | |
844 | static int sctp_inet6_bind_verify(struct sctp_sock *opt, union sctp_addr *addr) | |
845 | { | |
846 | struct sctp_af *af; | |
847 | ||
848 | /* ASSERT: address family has already been verified. */ | |
849 | if (addr->sa.sa_family != AF_INET6) | |
850 | af = sctp_get_af_specific(addr->sa.sa_family); | |
851 | else { | |
1da177e4 | 852 | int type = ipv6_addr_type(&addr->v6.sin6_addr); |
6a6ddb2a SS |
853 | struct net_device *dev; |
854 | ||
1da177e4 | 855 | if (type & IPV6_ADDR_LINKLOCAL) { |
6a6ddb2a SS |
856 | if (!addr->v6.sin6_scope_id) |
857 | return 0; | |
858 | dev = dev_get_by_index(addr->v6.sin6_scope_id); | |
859 | if (!dev) | |
1da177e4 | 860 | return 0; |
1669d857 VY |
861 | if (!ipv6_chk_addr(&addr->v6.sin6_addr, dev, 0)) { |
862 | dev_put(dev); | |
863 | return 0; | |
864 | } | |
6a6ddb2a | 865 | dev_put(dev); |
1da177e4 LT |
866 | } |
867 | af = opt->pf->af; | |
868 | } | |
869 | return af->available(addr, opt); | |
870 | } | |
871 | ||
6a6ddb2a | 872 | /* Verify that the provided sockaddr looks sendable. Common verification, |
1da177e4 LT |
873 | * has already been taken care of. |
874 | */ | |
875 | static int sctp_inet6_send_verify(struct sctp_sock *opt, union sctp_addr *addr) | |
876 | { | |
877 | struct sctp_af *af = NULL; | |
878 | ||
879 | /* ASSERT: address family has already been verified. */ | |
880 | if (addr->sa.sa_family != AF_INET6) | |
881 | af = sctp_get_af_specific(addr->sa.sa_family); | |
882 | else { | |
1da177e4 | 883 | int type = ipv6_addr_type(&addr->v6.sin6_addr); |
6a6ddb2a SS |
884 | struct net_device *dev; |
885 | ||
1da177e4 | 886 | if (type & IPV6_ADDR_LINKLOCAL) { |
6a6ddb2a SS |
887 | if (!addr->v6.sin6_scope_id) |
888 | return 0; | |
889 | dev = dev_get_by_index(addr->v6.sin6_scope_id); | |
890 | if (!dev) | |
1da177e4 | 891 | return 0; |
6a6ddb2a | 892 | dev_put(dev); |
1da177e4 LT |
893 | } |
894 | af = opt->pf->af; | |
895 | } | |
896 | ||
897 | return af != NULL; | |
898 | } | |
899 | ||
900 | /* Fill in Supported Address Type information for INIT and INIT-ACK | |
901 | * chunks. Note: In the future, we may want to look at sock options | |
902 | * to determine whether a PF_INET6 socket really wants to have IPV4 | |
903 | * addresses. | |
904 | * Returns number of addresses supported. | |
905 | */ | |
906 | static int sctp_inet6_supported_addrs(const struct sctp_sock *opt, | |
3dbe8656 | 907 | __be16 *types) |
1da177e4 LT |
908 | { |
909 | types[0] = SCTP_PARAM_IPV4_ADDRESS; | |
910 | types[1] = SCTP_PARAM_IPV6_ADDRESS; | |
911 | return 2; | |
912 | } | |
913 | ||
90ddc4f0 | 914 | static const struct proto_ops inet6_seqpacket_ops = { |
543d9cfe ACM |
915 | .family = PF_INET6, |
916 | .owner = THIS_MODULE, | |
917 | .release = inet6_release, | |
918 | .bind = inet6_bind, | |
919 | .connect = inet_dgram_connect, | |
920 | .socketpair = sock_no_socketpair, | |
921 | .accept = inet_accept, | |
922 | .getname = inet6_getname, | |
923 | .poll = sctp_poll, | |
924 | .ioctl = inet6_ioctl, | |
925 | .listen = sctp_inet_listen, | |
926 | .shutdown = inet_shutdown, | |
927 | .setsockopt = sock_common_setsockopt, | |
928 | .getsockopt = sock_common_getsockopt, | |
929 | .sendmsg = inet_sendmsg, | |
930 | .recvmsg = sock_common_recvmsg, | |
931 | .mmap = sock_no_mmap, | |
3fdadf7d | 932 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
933 | .compat_setsockopt = compat_sock_common_setsockopt, |
934 | .compat_getsockopt = compat_sock_common_getsockopt, | |
3fdadf7d | 935 | #endif |
1da177e4 LT |
936 | }; |
937 | ||
938 | static struct inet_protosw sctpv6_seqpacket_protosw = { | |
939 | .type = SOCK_SEQPACKET, | |
940 | .protocol = IPPROTO_SCTP, | |
941 | .prot = &sctpv6_prot, | |
942 | .ops = &inet6_seqpacket_ops, | |
943 | .capability = -1, | |
944 | .no_check = 0, | |
945 | .flags = SCTP_PROTOSW_FLAG | |
946 | }; | |
947 | static struct inet_protosw sctpv6_stream_protosw = { | |
948 | .type = SOCK_STREAM, | |
949 | .protocol = IPPROTO_SCTP, | |
950 | .prot = &sctpv6_prot, | |
951 | .ops = &inet6_seqpacket_ops, | |
952 | .capability = -1, | |
953 | .no_check = 0, | |
954 | .flags = SCTP_PROTOSW_FLAG, | |
955 | }; | |
956 | ||
951dbc8a | 957 | static int sctp6_rcv(struct sk_buff **pskb) |
1da177e4 LT |
958 | { |
959 | return sctp_rcv(*pskb) ? -1 : 0; | |
960 | } | |
961 | ||
962 | static struct inet6_protocol sctpv6_protocol = { | |
963 | .handler = sctp6_rcv, | |
964 | .err_handler = sctp_v6_err, | |
965 | .flags = INET6_PROTO_NOPOLICY | INET6_PROTO_FINAL, | |
966 | }; | |
967 | ||
968 | static struct sctp_af sctp_ipv6_specific = { | |
543d9cfe ACM |
969 | .sa_family = AF_INET6, |
970 | .sctp_xmit = sctp_v6_xmit, | |
971 | .setsockopt = ipv6_setsockopt, | |
972 | .getsockopt = ipv6_getsockopt, | |
973 | .get_dst = sctp_v6_get_dst, | |
974 | .get_saddr = sctp_v6_get_saddr, | |
975 | .copy_addrlist = sctp_v6_copy_addrlist, | |
976 | .from_skb = sctp_v6_from_skb, | |
977 | .from_sk = sctp_v6_from_sk, | |
978 | .to_sk_saddr = sctp_v6_to_sk_saddr, | |
979 | .to_sk_daddr = sctp_v6_to_sk_daddr, | |
980 | .from_addr_param = sctp_v6_from_addr_param, | |
981 | .to_addr_param = sctp_v6_to_addr_param, | |
982 | .dst_saddr = sctp_v6_dst_saddr, | |
983 | .cmp_addr = sctp_v6_cmp_addr, | |
984 | .scope = sctp_v6_scope, | |
985 | .addr_valid = sctp_v6_addr_valid, | |
986 | .inaddr_any = sctp_v6_inaddr_any, | |
987 | .is_any = sctp_v6_is_any, | |
988 | .available = sctp_v6_available, | |
989 | .skb_iif = sctp_v6_skb_iif, | |
990 | .is_ce = sctp_v6_is_ce, | |
991 | .seq_dump_addr = sctp_v6_seq_dump_addr, | |
992 | .net_header_len = sizeof(struct ipv6hdr), | |
993 | .sockaddr_len = sizeof(struct sockaddr_in6), | |
3fdadf7d | 994 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
995 | .compat_setsockopt = compat_ipv6_setsockopt, |
996 | .compat_getsockopt = compat_ipv6_getsockopt, | |
3fdadf7d | 997 | #endif |
1da177e4 LT |
998 | }; |
999 | ||
1000 | static struct sctp_pf sctp_pf_inet6_specific = { | |
1001 | .event_msgname = sctp_inet6_event_msgname, | |
1002 | .skb_msgname = sctp_inet6_skb_msgname, | |
1003 | .af_supported = sctp_inet6_af_supported, | |
1004 | .cmp_addr = sctp_inet6_cmp_addr, | |
1005 | .bind_verify = sctp_inet6_bind_verify, | |
1006 | .send_verify = sctp_inet6_send_verify, | |
1007 | .supported_addrs = sctp_inet6_supported_addrs, | |
1008 | .create_accept_sk = sctp_v6_create_accept_sk, | |
1009 | .addr_v4map = sctp_v6_addr_v4map, | |
1010 | .af = &sctp_ipv6_specific, | |
1011 | }; | |
1012 | ||
827bf122 | 1013 | /* Initialize IPv6 support and register with socket layer. */ |
1da177e4 LT |
1014 | int sctp_v6_init(void) |
1015 | { | |
827bf122 | 1016 | int rc; |
1da177e4 | 1017 | |
827bf122 SS |
1018 | /* Register the SCTP specific PF_INET6 functions. */ |
1019 | sctp_register_pf(&sctp_pf_inet6_specific, PF_INET6); | |
1020 | ||
1021 | /* Register the SCTP specific AF_INET6 functions. */ | |
1022 | sctp_register_af(&sctp_ipv6_specific); | |
1023 | ||
1024 | rc = proto_register(&sctpv6_prot, 1); | |
1da177e4 | 1025 | if (rc) |
827bf122 | 1026 | return rc; |
1da177e4 LT |
1027 | |
1028 | /* Add SCTPv6(UDP and TCP style) to inetsw6 linked list. */ | |
1029 | inet6_register_protosw(&sctpv6_seqpacket_protosw); | |
1030 | inet6_register_protosw(&sctpv6_stream_protosw); | |
1031 | ||
827bf122 SS |
1032 | return 0; |
1033 | } | |
1da177e4 | 1034 | |
827bf122 SS |
1035 | /* Register with inet6 layer. */ |
1036 | int sctp_v6_add_protocol(void) | |
1037 | { | |
1da177e4 LT |
1038 | /* Register notifier for inet6 address additions/deletions. */ |
1039 | register_inet6addr_notifier(&sctp_inet6addr_notifier); | |
827bf122 SS |
1040 | |
1041 | if (inet6_add_protocol(&sctpv6_protocol, IPPROTO_SCTP) < 0) | |
1042 | return -EAGAIN; | |
1043 | ||
1044 | return 0; | |
1da177e4 LT |
1045 | } |
1046 | ||
1047 | /* IPv6 specific exit support. */ | |
1048 | void sctp_v6_exit(void) | |
1049 | { | |
1da177e4 LT |
1050 | inet6_unregister_protosw(&sctpv6_seqpacket_protosw); |
1051 | inet6_unregister_protosw(&sctpv6_stream_protosw); | |
1da177e4 | 1052 | proto_unregister(&sctpv6_prot); |
827bf122 SS |
1053 | list_del(&sctp_ipv6_specific.list); |
1054 | } | |
1055 | ||
1056 | /* Unregister with inet6 layer. */ | |
1057 | void sctp_v6_del_protocol(void) | |
1058 | { | |
1059 | inet6_del_protocol(&sctpv6_protocol, IPPROTO_SCTP); | |
1060 | unregister_inet6addr_notifier(&sctp_inet6addr_notifier); | |
1da177e4 | 1061 | } |