Commit | Line | Data |
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60c778b2 | 1 | /* SCTP kernel implementation |
1da177e4 LT |
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 | * | |
60c778b2 | 7 | * This file is part of the SCTP kernel implementation |
1da177e4 LT |
8 | * |
9 | * SCTP over IPv6. | |
10 | * | |
60c778b2 | 11 | * This SCTP implementation is free software; |
1da177e4 LT |
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 | * | |
60c778b2 | 17 | * This SCTP implementation is distributed in the hope that it |
1da177e4 LT |
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 | ||
145ce502 JP |
50 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
51 | ||
1da177e4 LT |
52 | #include <linux/module.h> |
53 | #include <linux/errno.h> | |
54 | #include <linux/types.h> | |
55 | #include <linux/socket.h> | |
56 | #include <linux/sockios.h> | |
57 | #include <linux/net.h> | |
1da177e4 LT |
58 | #include <linux/in.h> |
59 | #include <linux/in6.h> | |
60 | #include <linux/netdevice.h> | |
61 | #include <linux/init.h> | |
62 | #include <linux/ipsec.h> | |
5a0e3ad6 | 63 | #include <linux/slab.h> |
1da177e4 LT |
64 | |
65 | #include <linux/ipv6.h> | |
66 | #include <linux/icmpv6.h> | |
67 | #include <linux/random.h> | |
68 | #include <linux/seq_file.h> | |
69 | ||
70 | #include <net/protocol.h> | |
1da177e4 | 71 | #include <net/ndisc.h> |
c752f073 | 72 | #include <net/ip.h> |
1da177e4 LT |
73 | #include <net/ipv6.h> |
74 | #include <net/transp_v6.h> | |
75 | #include <net/addrconf.h> | |
76 | #include <net/ip6_route.h> | |
77 | #include <net/inet_common.h> | |
78 | #include <net/inet_ecn.h> | |
79 | #include <net/sctp/sctp.h> | |
80 | ||
81 | #include <asm/uaccess.h> | |
82 | ||
62503411 WS |
83 | static inline int sctp_v6_addr_match_len(union sctp_addr *s1, |
84 | union sctp_addr *s2); | |
9914ae3c VY |
85 | static void sctp_v6_to_addr(union sctp_addr *addr, struct in6_addr *saddr, |
86 | __be16 port); | |
87 | static int sctp_v6_cmp_addr(const union sctp_addr *addr1, | |
88 | const union sctp_addr *addr2); | |
62503411 | 89 | |
29303547 VY |
90 | /* Event handler for inet6 address addition/deletion events. |
91 | * The sctp_local_addr_list needs to be protocted by a spin lock since | |
92 | * multiple notifiers (say IPv4 and IPv6) may be running at the same | |
93 | * time and thus corrupt the list. | |
94 | * The reader side is protected with RCU. | |
95 | */ | |
24123186 AB |
96 | static int sctp_inet6addr_event(struct notifier_block *this, unsigned long ev, |
97 | void *ptr) | |
29c7cf96 SS |
98 | { |
99 | struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr; | |
29303547 VY |
100 | struct sctp_sockaddr_entry *addr = NULL; |
101 | struct sctp_sockaddr_entry *temp; | |
4db67e80 | 102 | struct net *net = dev_net(ifa->idev->dev); |
22626216 | 103 | int found = 0; |
29c7cf96 SS |
104 | |
105 | switch (ev) { | |
106 | case NETDEV_UP: | |
107 | addr = kmalloc(sizeof(struct sctp_sockaddr_entry), GFP_ATOMIC); | |
108 | if (addr) { | |
109 | addr->a.v6.sin6_family = AF_INET6; | |
110 | addr->a.v6.sin6_port = 0; | |
4e3fd7a0 | 111 | addr->a.v6.sin6_addr = ifa->addr; |
29c7cf96 | 112 | addr->a.v6.sin6_scope_id = ifa->idev->dev->ifindex; |
29303547 | 113 | addr->valid = 1; |
4db67e80 EB |
114 | spin_lock_bh(&net->sctp.local_addr_lock); |
115 | list_add_tail_rcu(&addr->list, &net->sctp.local_addr_list); | |
116 | sctp_addr_wq_mgmt(net, addr, SCTP_ADDR_NEW); | |
117 | spin_unlock_bh(&net->sctp.local_addr_lock); | |
29c7cf96 SS |
118 | } |
119 | break; | |
120 | case NETDEV_DOWN: | |
4db67e80 | 121 | spin_lock_bh(&net->sctp.local_addr_lock); |
29303547 | 122 | list_for_each_entry_safe(addr, temp, |
4db67e80 | 123 | &net->sctp.local_addr_list, list) { |
a40a7d15 PE |
124 | if (addr->a.sa.sa_family == AF_INET6 && |
125 | ipv6_addr_equal(&addr->a.v6.sin6_addr, | |
126 | &ifa->addr)) { | |
4db67e80 | 127 | sctp_addr_wq_mgmt(net, addr, SCTP_ADDR_DEL); |
22626216 | 128 | found = 1; |
29303547 VY |
129 | addr->valid = 0; |
130 | list_del_rcu(&addr->list); | |
29c7cf96 SS |
131 | break; |
132 | } | |
133 | } | |
4db67e80 | 134 | spin_unlock_bh(&net->sctp.local_addr_lock); |
22626216 | 135 | if (found) |
1231f0ba | 136 | kfree_rcu(addr, rcu); |
29c7cf96 SS |
137 | break; |
138 | } | |
139 | ||
140 | return NOTIFY_DONE; | |
141 | } | |
142 | ||
1da177e4 | 143 | static struct notifier_block sctp_inet6addr_notifier = { |
29c7cf96 | 144 | .notifier_call = sctp_inet6addr_event, |
1da177e4 LT |
145 | }; |
146 | ||
147 | /* ICMP error handler. */ | |
dda91928 DB |
148 | static void sctp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt, |
149 | u8 type, u8 code, int offset, __be32 info) | |
1da177e4 LT |
150 | { |
151 | struct inet6_dev *idev; | |
1da177e4 | 152 | struct sock *sk; |
1da177e4 LT |
153 | struct sctp_association *asoc; |
154 | struct sctp_transport *transport; | |
155 | struct ipv6_pinfo *np; | |
2c928e0e | 156 | __u16 saveip, savesctp; |
1da177e4 | 157 | int err; |
4110cc25 | 158 | struct net *net = dev_net(skb->dev); |
1da177e4 LT |
159 | |
160 | idev = in6_dev_get(skb->dev); | |
161 | ||
162 | /* Fix up skb to look at the embedded net header. */ | |
b0e380b1 ACM |
163 | saveip = skb->network_header; |
164 | savesctp = skb->transport_header; | |
1ced98e8 | 165 | skb_reset_network_header(skb); |
a27ef749 | 166 | skb_set_transport_header(skb, offset); |
4110cc25 | 167 | sk = sctp_err_lookup(net, AF_INET6, skb, sctp_hdr(skb), &asoc, &transport); |
1da177e4 | 168 | /* Put back, the original pointers. */ |
b0e380b1 ACM |
169 | skb->network_header = saveip; |
170 | skb->transport_header = savesctp; | |
1da177e4 | 171 | if (!sk) { |
b01a2407 | 172 | ICMP6_INC_STATS_BH(net, idev, ICMP6_MIB_INERRORS); |
1da177e4 LT |
173 | goto out; |
174 | } | |
175 | ||
176 | /* Warning: The sock lock is held. Remember to call | |
177 | * sctp_err_finish! | |
178 | */ | |
179 | ||
180 | switch (type) { | |
181 | case ICMPV6_PKT_TOOBIG: | |
182 | sctp_icmp_frag_needed(sk, asoc, transport, ntohl(info)); | |
183 | goto out_unlock; | |
184 | case ICMPV6_PARAMPROB: | |
185 | if (ICMPV6_UNK_NEXTHDR == code) { | |
d1ad1ff2 | 186 | sctp_icmp_proto_unreachable(sk, asoc, transport); |
1da177e4 LT |
187 | goto out_unlock; |
188 | } | |
189 | break; | |
ec18d9a2 DM |
190 | case NDISC_REDIRECT: |
191 | sctp_icmp_redirect(sk, transport, skb); | |
192 | break; | |
1da177e4 LT |
193 | default: |
194 | break; | |
195 | } | |
196 | ||
197 | np = inet6_sk(sk); | |
198 | icmpv6_err_convert(type, code, &err); | |
199 | if (!sock_owned_by_user(sk) && np->recverr) { | |
200 | sk->sk_err = err; | |
201 | sk->sk_error_report(sk); | |
202 | } else { /* Only an error on timeout */ | |
203 | sk->sk_err_soft = err; | |
204 | } | |
205 | ||
206 | out_unlock: | |
d1ad1ff2 | 207 | sctp_err_finish(sk, asoc); |
1da177e4 LT |
208 | out: |
209 | if (likely(idev != NULL)) | |
210 | in6_dev_put(idev); | |
211 | } | |
212 | ||
213 | /* Based on tcp_v6_xmit() in tcp_ipv6.c. */ | |
f880374c | 214 | static int sctp_v6_xmit(struct sk_buff *skb, struct sctp_transport *transport) |
1da177e4 LT |
215 | { |
216 | struct sock *sk = skb->sk; | |
217 | struct ipv6_pinfo *np = inet6_sk(sk); | |
4c9483b2 | 218 | struct flowi6 fl6; |
1da177e4 | 219 | |
4c9483b2 | 220 | memset(&fl6, 0, sizeof(fl6)); |
1da177e4 | 221 | |
4c9483b2 | 222 | fl6.flowi6_proto = sk->sk_protocol; |
1da177e4 LT |
223 | |
224 | /* Fill in the dest address from the route entry passed with the skb | |
225 | * and the source address from the transport. | |
226 | */ | |
4e3fd7a0 AD |
227 | fl6.daddr = transport->ipaddr.v6.sin6_addr; |
228 | fl6.saddr = transport->saddr.v6.sin6_addr; | |
1da177e4 | 229 | |
4c9483b2 DM |
230 | fl6.flowlabel = np->flow_label; |
231 | IP6_ECN_flow_xmit(sk, fl6.flowlabel); | |
232 | if (ipv6_addr_type(&fl6.saddr) & IPV6_ADDR_LINKLOCAL) | |
233 | fl6.flowi6_oif = transport->saddr.v6.sin6_scope_id; | |
1da177e4 | 234 | else |
4c9483b2 | 235 | fl6.flowi6_oif = sk->sk_bound_dev_if; |
1da177e4 LT |
236 | |
237 | if (np->opt && np->opt->srcrt) { | |
238 | struct rt0_hdr *rt0 = (struct rt0_hdr *) np->opt->srcrt; | |
4e3fd7a0 | 239 | fl6.daddr = *rt0->addr; |
1da177e4 LT |
240 | } |
241 | ||
bb33381d DB |
242 | pr_debug("%s: skb:%p, len:%d, src:%pI6 dst:%pI6\n", __func__, skb, |
243 | skb->len, &fl6.saddr, &fl6.daddr); | |
1da177e4 | 244 | |
b01a2407 | 245 | SCTP_INC_STATS(sock_net(sk), SCTP_MIB_OUTSCTPPACKS); |
1da177e4 | 246 | |
f880374c HX |
247 | if (!(transport->param_flags & SPP_PMTUD_ENABLE)) |
248 | skb->local_df = 1; | |
249 | ||
b903d324 | 250 | return ip6_xmit(sk, skb, &fl6, np->opt, np->tclass); |
1da177e4 LT |
251 | } |
252 | ||
253 | /* Returns the dst cache entry for the given source and destination ip | |
254 | * addresses. | |
255 | */ | |
da0420be VY |
256 | static void sctp_v6_get_dst(struct sctp_transport *t, union sctp_addr *saddr, |
257 | struct flowi *fl, struct sock *sk) | |
1da177e4 | 258 | { |
da0420be | 259 | struct sctp_association *asoc = t->asoc; |
62503411 | 260 | struct dst_entry *dst = NULL; |
9914ae3c | 261 | struct flowi6 *fl6 = &fl->u.ip6; |
62503411 WS |
262 | struct sctp_bind_addr *bp; |
263 | struct sctp_sockaddr_entry *laddr; | |
264 | union sctp_addr *baddr = NULL; | |
da0420be | 265 | union sctp_addr *daddr = &t->ipaddr; |
9914ae3c | 266 | union sctp_addr dst_saddr; |
62503411 WS |
267 | __u8 matchlen = 0; |
268 | __u8 bmatchlen; | |
269 | sctp_scope_t scope; | |
1da177e4 | 270 | |
9914ae3c | 271 | memset(fl6, 0, sizeof(struct flowi6)); |
4e3fd7a0 | 272 | fl6->daddr = daddr->v6.sin6_addr; |
9c6a02f4 VY |
273 | fl6->fl6_dport = daddr->v6.sin6_port; |
274 | fl6->flowi6_proto = IPPROTO_SCTP; | |
1da177e4 | 275 | if (ipv6_addr_type(&daddr->v6.sin6_addr) & IPV6_ADDR_LINKLOCAL) |
9914ae3c | 276 | fl6->flowi6_oif = daddr->v6.sin6_scope_id; |
d808ad9a | 277 | |
bb33381d | 278 | pr_debug("%s: dst=%pI6 ", __func__, &fl6->daddr); |
1da177e4 | 279 | |
9c6a02f4 VY |
280 | if (asoc) |
281 | fl6->fl6_sport = htons(asoc->base.bind_addr.port); | |
1da177e4 LT |
282 | |
283 | if (saddr) { | |
4e3fd7a0 | 284 | fl6->saddr = saddr->v6.sin6_addr; |
9c6a02f4 | 285 | fl6->fl6_sport = saddr->v6.sin6_port; |
bb33381d DB |
286 | |
287 | pr_debug("src=%pI6 - ", &fl6->saddr); | |
1da177e4 LT |
288 | } |
289 | ||
9c6a02f4 | 290 | dst = ip6_dst_lookup_flow(sk, fl6, NULL, false); |
62503411 WS |
291 | if (!asoc || saddr) |
292 | goto out; | |
293 | ||
9914ae3c VY |
294 | bp = &asoc->base.bind_addr; |
295 | scope = sctp_scope(daddr); | |
296 | /* ip6_dst_lookup has filled in the fl6->saddr for us. Check | |
297 | * to see if we can use it. | |
298 | */ | |
9c6a02f4 | 299 | if (!IS_ERR(dst)) { |
9914ae3c VY |
300 | /* Walk through the bind address list and look for a bind |
301 | * address that matches the source address of the returned dst. | |
62503411 | 302 | */ |
9914ae3c | 303 | sctp_v6_to_addr(&dst_saddr, &fl6->saddr, htons(bp->port)); |
62503411 WS |
304 | rcu_read_lock(); |
305 | list_for_each_entry_rcu(laddr, &bp->address_list, list) { | |
9914ae3c | 306 | if (!laddr->valid || (laddr->state != SCTP_ADDR_SRC)) |
62503411 | 307 | continue; |
9914ae3c VY |
308 | |
309 | /* Do not compare against v4 addrs */ | |
310 | if ((laddr->a.sa.sa_family == AF_INET6) && | |
311 | (sctp_v6_cmp_addr(&dst_saddr, &laddr->a))) { | |
312 | rcu_read_unlock(); | |
313 | goto out; | |
62503411 WS |
314 | } |
315 | } | |
316 | rcu_read_unlock(); | |
9914ae3c VY |
317 | /* None of the bound addresses match the source address of the |
318 | * dst. So release it. | |
319 | */ | |
320 | dst_release(dst); | |
321 | dst = NULL; | |
1da177e4 LT |
322 | } |
323 | ||
9914ae3c VY |
324 | /* Walk through the bind address list and try to get the |
325 | * best source address for a given destination. | |
326 | */ | |
327 | rcu_read_lock(); | |
328 | list_for_each_entry_rcu(laddr, &bp->address_list, list) { | |
e9c0dfba | 329 | if (!laddr->valid) |
9914ae3c | 330 | continue; |
e9c0dfba DB |
331 | if ((laddr->state == SCTP_ADDR_SRC) && |
332 | (laddr->a.sa.sa_family == AF_INET6) && | |
9914ae3c VY |
333 | (scope <= sctp_scope(&laddr->a))) { |
334 | bmatchlen = sctp_v6_addr_match_len(daddr, &laddr->a); | |
335 | if (!baddr || (matchlen < bmatchlen)) { | |
336 | baddr = &laddr->a; | |
337 | matchlen = bmatchlen; | |
338 | } | |
62503411 WS |
339 | } |
340 | } | |
9914ae3c VY |
341 | rcu_read_unlock(); |
342 | if (baddr) { | |
4e3fd7a0 | 343 | fl6->saddr = baddr->v6.sin6_addr; |
9c6a02f4 VY |
344 | fl6->fl6_sport = baddr->v6.sin6_port; |
345 | dst = ip6_dst_lookup_flow(sk, fl6, NULL, false); | |
9914ae3c VY |
346 | } |
347 | ||
62503411 | 348 | out: |
ee3f34e8 | 349 | if (!IS_ERR_OR_NULL(dst)) { |
1da177e4 | 350 | struct rt6_info *rt; |
bb33381d | 351 | |
1da177e4 | 352 | rt = (struct rt6_info *)dst; |
da0420be | 353 | t->dst = dst; |
bb33381d DB |
354 | |
355 | pr_debug("rt6_dst:%pI6 rt6_src:%pI6\n", &rt->rt6i_dst.addr, | |
356 | &fl6->saddr); | |
da0420be VY |
357 | } else { |
358 | t->dst = NULL; | |
bb33381d DB |
359 | |
360 | pr_debug("no route\n"); | |
1da177e4 | 361 | } |
1da177e4 LT |
362 | } |
363 | ||
364 | /* Returns the number of consecutive initial bits that match in the 2 ipv6 | |
365 | * addresses. | |
366 | */ | |
367 | static inline int sctp_v6_addr_match_len(union sctp_addr *s1, | |
368 | union sctp_addr *s2) | |
369 | { | |
de7737e0 | 370 | return ipv6_addr_diff(&s1->v6.sin6_addr, &s2->v6.sin6_addr); |
1da177e4 LT |
371 | } |
372 | ||
373 | /* Fills in the source address(saddr) based on the destination address(daddr) | |
374 | * and asoc's bind address list. | |
375 | */ | |
e5117101 | 376 | static void sctp_v6_get_saddr(struct sctp_sock *sk, |
9914ae3c | 377 | struct sctp_transport *t, |
9914ae3c | 378 | struct flowi *fl) |
1da177e4 | 379 | { |
9914ae3c VY |
380 | struct flowi6 *fl6 = &fl->u.ip6; |
381 | union sctp_addr *saddr = &t->saddr; | |
1da177e4 | 382 | |
bb33381d | 383 | pr_debug("%s: asoc:%p dst:%p\n", __func__, t->asoc, t->dst); |
1da177e4 | 384 | |
9914ae3c VY |
385 | if (t->dst) { |
386 | saddr->v6.sin6_family = AF_INET6; | |
4e3fd7a0 | 387 | saddr->v6.sin6_addr = fl6->saddr; |
1da177e4 | 388 | } |
1da177e4 LT |
389 | } |
390 | ||
391 | /* Make a copy of all potential local addresses. */ | |
392 | static void sctp_v6_copy_addrlist(struct list_head *addrlist, | |
393 | struct net_device *dev) | |
394 | { | |
395 | struct inet6_dev *in6_dev; | |
396 | struct inet6_ifaddr *ifp; | |
397 | struct sctp_sockaddr_entry *addr; | |
398 | ||
8814c4b5 | 399 | rcu_read_lock(); |
1da177e4 | 400 | if ((in6_dev = __in6_dev_get(dev)) == NULL) { |
8814c4b5 | 401 | rcu_read_unlock(); |
1da177e4 LT |
402 | return; |
403 | } | |
404 | ||
e2eb8d45 | 405 | read_lock_bh(&in6_dev->lock); |
502a2ffd | 406 | list_for_each_entry(ifp, &in6_dev->addr_list, if_list) { |
1da177e4 | 407 | /* Add the address to the local list. */ |
939cfa75 | 408 | addr = kzalloc(sizeof(*addr), GFP_ATOMIC); |
1da177e4 | 409 | if (addr) { |
2a6fd78a AV |
410 | addr->a.v6.sin6_family = AF_INET6; |
411 | addr->a.v6.sin6_port = 0; | |
4e3fd7a0 | 412 | addr->a.v6.sin6_addr = ifp->addr; |
2a6fd78a | 413 | addr->a.v6.sin6_scope_id = dev->ifindex; |
29303547 | 414 | addr->valid = 1; |
1da177e4 LT |
415 | INIT_LIST_HEAD(&addr->list); |
416 | list_add_tail(&addr->list, addrlist); | |
417 | } | |
418 | } | |
419 | ||
e2eb8d45 | 420 | read_unlock_bh(&in6_dev->lock); |
8814c4b5 | 421 | rcu_read_unlock(); |
1da177e4 LT |
422 | } |
423 | ||
424 | /* Initialize a sockaddr_storage from in incoming skb. */ | |
425 | static void sctp_v6_from_skb(union sctp_addr *addr,struct sk_buff *skb, | |
426 | int is_saddr) | |
427 | { | |
d55c41b1 | 428 | __be16 *port; |
1da177e4 LT |
429 | struct sctphdr *sh; |
430 | ||
431 | port = &addr->v6.sin6_port; | |
432 | addr->v6.sin6_family = AF_INET6; | |
433 | addr->v6.sin6_flowinfo = 0; /* FIXME */ | |
434 | addr->v6.sin6_scope_id = ((struct inet6_skb_parm *)skb->cb)->iif; | |
435 | ||
2c0fd387 | 436 | sh = sctp_hdr(skb); |
1da177e4 | 437 | if (is_saddr) { |
d55c41b1 | 438 | *port = sh->source; |
4e3fd7a0 | 439 | addr->v6.sin6_addr = ipv6_hdr(skb)->saddr; |
1da177e4 | 440 | } else { |
d55c41b1 | 441 | *port = sh->dest; |
4e3fd7a0 | 442 | addr->v6.sin6_addr = ipv6_hdr(skb)->daddr; |
1da177e4 | 443 | } |
1da177e4 LT |
444 | } |
445 | ||
446 | /* Initialize an sctp_addr from a socket. */ | |
447 | static void sctp_v6_from_sk(union sctp_addr *addr, struct sock *sk) | |
448 | { | |
449 | addr->v6.sin6_family = AF_INET6; | |
7dcdbd95 | 450 | addr->v6.sin6_port = 0; |
4e3fd7a0 | 451 | addr->v6.sin6_addr = inet6_sk(sk)->rcv_saddr; |
1da177e4 LT |
452 | } |
453 | ||
454 | /* Initialize sk->sk_rcv_saddr from sctp_addr. */ | |
455 | static void sctp_v6_to_sk_saddr(union sctp_addr *addr, struct sock *sk) | |
456 | { | |
457 | if (addr->sa.sa_family == AF_INET && sctp_sk(sk)->v4mapped) { | |
458 | inet6_sk(sk)->rcv_saddr.s6_addr32[0] = 0; | |
459 | inet6_sk(sk)->rcv_saddr.s6_addr32[1] = 0; | |
460 | inet6_sk(sk)->rcv_saddr.s6_addr32[2] = htonl(0x0000ffff); | |
461 | inet6_sk(sk)->rcv_saddr.s6_addr32[3] = | |
462 | addr->v4.sin_addr.s_addr; | |
463 | } else { | |
4e3fd7a0 | 464 | inet6_sk(sk)->rcv_saddr = addr->v6.sin6_addr; |
1da177e4 LT |
465 | } |
466 | } | |
467 | ||
468 | /* Initialize sk->sk_daddr from sctp_addr. */ | |
469 | static void sctp_v6_to_sk_daddr(union sctp_addr *addr, struct sock *sk) | |
470 | { | |
471 | if (addr->sa.sa_family == AF_INET && sctp_sk(sk)->v4mapped) { | |
472 | inet6_sk(sk)->daddr.s6_addr32[0] = 0; | |
473 | inet6_sk(sk)->daddr.s6_addr32[1] = 0; | |
474 | inet6_sk(sk)->daddr.s6_addr32[2] = htonl(0x0000ffff); | |
475 | inet6_sk(sk)->daddr.s6_addr32[3] = addr->v4.sin_addr.s_addr; | |
476 | } else { | |
4e3fd7a0 | 477 | inet6_sk(sk)->daddr = addr->v6.sin6_addr; |
1da177e4 LT |
478 | } |
479 | } | |
480 | ||
481 | /* Initialize a sctp_addr from an address parameter. */ | |
482 | static void sctp_v6_from_addr_param(union sctp_addr *addr, | |
483 | union sctp_addr_param *param, | |
dd86d136 | 484 | __be16 port, int iif) |
1da177e4 LT |
485 | { |
486 | addr->v6.sin6_family = AF_INET6; | |
487 | addr->v6.sin6_port = port; | |
488 | addr->v6.sin6_flowinfo = 0; /* BUG */ | |
4e3fd7a0 | 489 | addr->v6.sin6_addr = param->v6.addr; |
1da177e4 LT |
490 | addr->v6.sin6_scope_id = iif; |
491 | } | |
492 | ||
493 | /* Initialize an address parameter from a sctp_addr and return the length | |
494 | * of the address parameter. | |
495 | */ | |
496 | static int sctp_v6_to_addr_param(const union sctp_addr *addr, | |
497 | union sctp_addr_param *param) | |
498 | { | |
499 | int length = sizeof(sctp_ipv6addr_param_t); | |
500 | ||
501 | param->v6.param_hdr.type = SCTP_PARAM_IPV6_ADDRESS; | |
dbc16db1 | 502 | param->v6.param_hdr.length = htons(length); |
4e3fd7a0 | 503 | param->v6.addr = addr->v6.sin6_addr; |
1da177e4 LT |
504 | |
505 | return length; | |
506 | } | |
507 | ||
9914ae3c VY |
508 | /* Initialize a sctp_addr from struct in6_addr. */ |
509 | static void sctp_v6_to_addr(union sctp_addr *addr, struct in6_addr *saddr, | |
854d43a4 | 510 | __be16 port) |
1da177e4 | 511 | { |
1da177e4 LT |
512 | addr->sa.sa_family = AF_INET6; |
513 | addr->v6.sin6_port = port; | |
4e3fd7a0 | 514 | addr->v6.sin6_addr = *saddr; |
1da177e4 LT |
515 | } |
516 | ||
517 | /* Compare addresses exactly. | |
518 | * v4-mapped-v6 is also in consideration. | |
519 | */ | |
520 | static int sctp_v6_cmp_addr(const union sctp_addr *addr1, | |
521 | const union sctp_addr *addr2) | |
522 | { | |
523 | if (addr1->sa.sa_family != addr2->sa.sa_family) { | |
524 | if (addr1->sa.sa_family == AF_INET && | |
525 | addr2->sa.sa_family == AF_INET6 && | |
e773e4fa | 526 | ipv6_addr_v4mapped(&addr2->v6.sin6_addr)) { |
1da177e4 LT |
527 | if (addr2->v6.sin6_port == addr1->v4.sin_port && |
528 | addr2->v6.sin6_addr.s6_addr32[3] == | |
529 | addr1->v4.sin_addr.s_addr) | |
530 | return 1; | |
531 | } | |
532 | if (addr2->sa.sa_family == AF_INET && | |
533 | addr1->sa.sa_family == AF_INET6 && | |
e773e4fa | 534 | ipv6_addr_v4mapped(&addr1->v6.sin6_addr)) { |
1da177e4 LT |
535 | if (addr1->v6.sin6_port == addr2->v4.sin_port && |
536 | addr1->v6.sin6_addr.s6_addr32[3] == | |
537 | addr2->v4.sin_addr.s_addr) | |
538 | return 1; | |
539 | } | |
540 | return 0; | |
541 | } | |
542 | if (!ipv6_addr_equal(&addr1->v6.sin6_addr, &addr2->v6.sin6_addr)) | |
543 | return 0; | |
544 | /* If this is a linklocal address, compare the scope_id. */ | |
545 | if (ipv6_addr_type(&addr1->v6.sin6_addr) & IPV6_ADDR_LINKLOCAL) { | |
546 | if (addr1->v6.sin6_scope_id && addr2->v6.sin6_scope_id && | |
547 | (addr1->v6.sin6_scope_id != addr2->v6.sin6_scope_id)) { | |
548 | return 0; | |
549 | } | |
550 | } | |
551 | ||
552 | return 1; | |
553 | } | |
554 | ||
555 | /* Initialize addr struct to INADDR_ANY. */ | |
6fbfa9f9 | 556 | static void sctp_v6_inaddr_any(union sctp_addr *addr, __be16 port) |
1da177e4 LT |
557 | { |
558 | memset(addr, 0x00, sizeof(union sctp_addr)); | |
559 | addr->v6.sin6_family = AF_INET6; | |
560 | addr->v6.sin6_port = port; | |
561 | } | |
562 | ||
563 | /* Is this a wildcard address? */ | |
564 | static int sctp_v6_is_any(const union sctp_addr *addr) | |
565 | { | |
b9b9e10f | 566 | return ipv6_addr_any(&addr->v6.sin6_addr); |
1da177e4 LT |
567 | } |
568 | ||
569 | /* Should this be available for binding? */ | |
570 | static int sctp_v6_available(union sctp_addr *addr, struct sctp_sock *sp) | |
571 | { | |
572 | int type; | |
b71d1d42 | 573 | const struct in6_addr *in6 = (const struct in6_addr *)&addr->v6.sin6_addr; |
1da177e4 LT |
574 | |
575 | type = ipv6_addr_type(in6); | |
576 | if (IPV6_ADDR_ANY == type) | |
577 | return 1; | |
578 | if (type == IPV6_ADDR_MAPPED) { | |
579 | if (sp && !sp->v4mapped) | |
580 | return 0; | |
581 | if (sp && ipv6_only_sock(sctp_opt2sk(sp))) | |
582 | return 0; | |
583 | sctp_v6_map_v4(addr); | |
584 | return sctp_get_af_specific(AF_INET)->available(addr, sp); | |
585 | } | |
586 | if (!(type & IPV6_ADDR_UNICAST)) | |
587 | return 0; | |
588 | ||
bb2db45b | 589 | return ipv6_chk_addr(sock_net(&sp->inet.sk), in6, NULL, 0); |
1da177e4 LT |
590 | } |
591 | ||
592 | /* This function checks if the address is a valid address to be used for | |
593 | * SCTP. | |
594 | * | |
595 | * Output: | |
596 | * Return 0 - If the address is a non-unicast or an illegal address. | |
597 | * Return 1 - If the address is a unicast. | |
598 | */ | |
5636bef7 VY |
599 | static int sctp_v6_addr_valid(union sctp_addr *addr, |
600 | struct sctp_sock *sp, | |
601 | const struct sk_buff *skb) | |
1da177e4 LT |
602 | { |
603 | int ret = ipv6_addr_type(&addr->v6.sin6_addr); | |
604 | ||
605 | /* Support v4-mapped-v6 address. */ | |
606 | if (ret == IPV6_ADDR_MAPPED) { | |
607 | /* Note: This routine is used in input, so v4-mapped-v6 | |
608 | * are disallowed here when there is no sctp_sock. | |
609 | */ | |
610 | if (!sp || !sp->v4mapped) | |
611 | return 0; | |
612 | if (sp && ipv6_only_sock(sctp_opt2sk(sp))) | |
613 | return 0; | |
614 | sctp_v6_map_v4(addr); | |
5636bef7 | 615 | return sctp_get_af_specific(AF_INET)->addr_valid(addr, sp, skb); |
1da177e4 LT |
616 | } |
617 | ||
618 | /* Is this a non-unicast address */ | |
619 | if (!(ret & IPV6_ADDR_UNICAST)) | |
620 | return 0; | |
621 | ||
622 | return 1; | |
623 | } | |
624 | ||
625 | /* What is the scope of 'addr'? */ | |
626 | static sctp_scope_t sctp_v6_scope(union sctp_addr *addr) | |
627 | { | |
628 | int v6scope; | |
629 | sctp_scope_t retval; | |
630 | ||
631 | /* The IPv6 scope is really a set of bit fields. | |
632 | * See IFA_* in <net/if_inet6.h>. Map to a generic SCTP scope. | |
633 | */ | |
634 | ||
635 | v6scope = ipv6_addr_scope(&addr->v6.sin6_addr); | |
636 | switch (v6scope) { | |
637 | case IFA_HOST: | |
638 | retval = SCTP_SCOPE_LOOPBACK; | |
639 | break; | |
640 | case IFA_LINK: | |
641 | retval = SCTP_SCOPE_LINK; | |
642 | break; | |
643 | case IFA_SITE: | |
644 | retval = SCTP_SCOPE_PRIVATE; | |
645 | break; | |
646 | default: | |
647 | retval = SCTP_SCOPE_GLOBAL; | |
648 | break; | |
3ff50b79 | 649 | } |
1da177e4 LT |
650 | |
651 | return retval; | |
652 | } | |
653 | ||
654 | /* Create and initialize a new sk for the socket to be returned by accept(). */ | |
655 | static struct sock *sctp_v6_create_accept_sk(struct sock *sk, | |
656 | struct sctp_association *asoc) | |
657 | { | |
1da177e4 | 658 | struct sock *newsk; |
1da177e4 LT |
659 | struct ipv6_pinfo *newnp, *np = inet6_sk(sk); |
660 | struct sctp6_sock *newsctp6sk; | |
661 | ||
3b1e0a65 | 662 | newsk = sk_alloc(sock_net(sk), PF_INET6, GFP_KERNEL, sk->sk_prot); |
1da177e4 LT |
663 | if (!newsk) |
664 | goto out; | |
665 | ||
666 | sock_init_data(NULL, newsk); | |
667 | ||
914e1c8b | 668 | sctp_copy_sock(newsk, sk, asoc); |
1da177e4 LT |
669 | sock_reset_flag(sk, SOCK_ZAPPED); |
670 | ||
671 | newsctp6sk = (struct sctp6_sock *)newsk; | |
672 | inet_sk(newsk)->pinet6 = &newsctp6sk->inet6; | |
673 | ||
b225b884 DJ |
674 | sctp_sk(newsk)->v4mapped = sctp_sk(sk)->v4mapped; |
675 | ||
1da177e4 LT |
676 | newnp = inet6_sk(newsk); |
677 | ||
678 | memcpy(newnp, np, sizeof(struct ipv6_pinfo)); | |
679 | ||
680 | /* Initialize sk's sport, dport, rcv_saddr and daddr for getsockname() | |
681 | * and getpeername(). | |
682 | */ | |
1da177e4 LT |
683 | sctp_v6_to_sk_daddr(&asoc->peer.primary_addr, newsk); |
684 | ||
e6848976 | 685 | sk_refcnt_debug_inc(newsk); |
1da177e4 LT |
686 | |
687 | if (newsk->sk_prot->init(newsk)) { | |
688 | sk_common_release(newsk); | |
689 | newsk = NULL; | |
690 | } | |
691 | ||
692 | out: | |
693 | return newsk; | |
694 | } | |
695 | ||
696 | /* Map v4 address to mapped v6 address */ | |
697 | static void sctp_v6_addr_v4map(struct sctp_sock *sp, union sctp_addr *addr) | |
698 | { | |
699 | if (sp->v4mapped && AF_INET == addr->sa.sa_family) | |
700 | sctp_v4_map_v6(addr); | |
701 | } | |
702 | ||
703 | /* Where did this skb come from? */ | |
704 | static int sctp_v6_skb_iif(const struct sk_buff *skb) | |
705 | { | |
706 | struct inet6_skb_parm *opt = (struct inet6_skb_parm *) skb->cb; | |
707 | return opt->iif; | |
708 | } | |
709 | ||
710 | /* Was this packet marked by Explicit Congestion Notification? */ | |
711 | static int sctp_v6_is_ce(const struct sk_buff *skb) | |
712 | { | |
0660e03f | 713 | return *((__u32 *)(ipv6_hdr(skb))) & htonl(1 << 20); |
1da177e4 LT |
714 | } |
715 | ||
716 | /* Dump the v6 addr to the seq file. */ | |
717 | static void sctp_v6_seq_dump_addr(struct seq_file *seq, union sctp_addr *addr) | |
718 | { | |
5b095d98 | 719 | seq_printf(seq, "%pI6 ", &addr->v6.sin6_addr); |
1da177e4 LT |
720 | } |
721 | ||
b9031d9d VY |
722 | static void sctp_v6_ecn_capable(struct sock *sk) |
723 | { | |
724 | inet6_sk(sk)->tclass |= INET_ECN_ECT_0; | |
725 | } | |
726 | ||
1da177e4 LT |
727 | /* Initialize a PF_INET6 socket msg_name. */ |
728 | static void sctp_inet6_msgname(char *msgname, int *addr_len) | |
729 | { | |
730 | struct sockaddr_in6 *sin6; | |
731 | ||
732 | sin6 = (struct sockaddr_in6 *)msgname; | |
733 | sin6->sin6_family = AF_INET6; | |
734 | sin6->sin6_flowinfo = 0; | |
735 | sin6->sin6_scope_id = 0; /*FIXME */ | |
736 | *addr_len = sizeof(struct sockaddr_in6); | |
737 | } | |
738 | ||
739 | /* Initialize a PF_INET msgname from a ulpevent. */ | |
740 | static void sctp_inet6_event_msgname(struct sctp_ulpevent *event, | |
741 | char *msgname, int *addrlen) | |
742 | { | |
743 | struct sockaddr_in6 *sin6, *sin6from; | |
744 | ||
745 | if (msgname) { | |
746 | union sctp_addr *addr; | |
747 | struct sctp_association *asoc; | |
748 | ||
749 | asoc = event->asoc; | |
750 | sctp_inet6_msgname(msgname, addrlen); | |
751 | sin6 = (struct sockaddr_in6 *)msgname; | |
752 | sin6->sin6_port = htons(asoc->peer.port); | |
753 | addr = &asoc->peer.primary_addr; | |
754 | ||
755 | /* Note: If we go to a common v6 format, this code | |
756 | * will change. | |
757 | */ | |
758 | ||
759 | /* Map ipv4 address into v4-mapped-on-v6 address. */ | |
760 | if (sctp_sk(asoc->base.sk)->v4mapped && | |
761 | AF_INET == addr->sa.sa_family) { | |
762 | sctp_v4_map_v6((union sctp_addr *)sin6); | |
763 | sin6->sin6_addr.s6_addr32[3] = | |
764 | addr->v4.sin_addr.s_addr; | |
765 | return; | |
766 | } | |
767 | ||
768 | sin6from = &asoc->peer.primary_addr.v6; | |
4e3fd7a0 | 769 | sin6->sin6_addr = sin6from->sin6_addr; |
1da177e4 LT |
770 | if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) |
771 | sin6->sin6_scope_id = sin6from->sin6_scope_id; | |
772 | } | |
773 | } | |
774 | ||
775 | /* Initialize a msg_name from an inbound skb. */ | |
776 | static void sctp_inet6_skb_msgname(struct sk_buff *skb, char *msgname, | |
777 | int *addr_len) | |
778 | { | |
779 | struct sctphdr *sh; | |
780 | struct sockaddr_in6 *sin6; | |
781 | ||
782 | if (msgname) { | |
783 | sctp_inet6_msgname(msgname, addr_len); | |
784 | sin6 = (struct sockaddr_in6 *)msgname; | |
2c0fd387 | 785 | sh = sctp_hdr(skb); |
1da177e4 LT |
786 | sin6->sin6_port = sh->source; |
787 | ||
788 | /* Map ipv4 address into v4-mapped-on-v6 address. */ | |
789 | if (sctp_sk(skb->sk)->v4mapped && | |
eddc9ec5 | 790 | ip_hdr(skb)->version == 4) { |
1da177e4 | 791 | sctp_v4_map_v6((union sctp_addr *)sin6); |
eddc9ec5 | 792 | sin6->sin6_addr.s6_addr32[3] = ip_hdr(skb)->saddr; |
1da177e4 LT |
793 | return; |
794 | } | |
795 | ||
796 | /* Otherwise, just copy the v6 address. */ | |
4e3fd7a0 | 797 | sin6->sin6_addr = ipv6_hdr(skb)->saddr; |
1da177e4 LT |
798 | if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) { |
799 | struct sctp_ulpevent *ev = sctp_skb2event(skb); | |
800 | sin6->sin6_scope_id = ev->iif; | |
801 | } | |
802 | } | |
803 | } | |
804 | ||
805 | /* Do we support this AF? */ | |
806 | static int sctp_inet6_af_supported(sa_family_t family, struct sctp_sock *sp) | |
807 | { | |
808 | switch (family) { | |
809 | case AF_INET6: | |
810 | return 1; | |
811 | /* v4-mapped-v6 addresses */ | |
812 | case AF_INET: | |
7dab83de | 813 | if (!__ipv6_only_sock(sctp_opt2sk(sp))) |
1da177e4 LT |
814 | return 1; |
815 | default: | |
816 | return 0; | |
817 | } | |
818 | } | |
819 | ||
820 | /* Address matching with wildcards allowed. This extra level | |
821 | * of indirection lets us choose whether a PF_INET6 should | |
822 | * disallow any v4 addresses if we so choose. | |
823 | */ | |
824 | static int sctp_inet6_cmp_addr(const union sctp_addr *addr1, | |
825 | const union sctp_addr *addr2, | |
826 | struct sctp_sock *opt) | |
827 | { | |
828 | struct sctp_af *af1, *af2; | |
52cae8f0 | 829 | struct sock *sk = sctp_opt2sk(opt); |
1da177e4 LT |
830 | |
831 | af1 = sctp_get_af_specific(addr1->sa.sa_family); | |
832 | af2 = sctp_get_af_specific(addr2->sa.sa_family); | |
833 | ||
834 | if (!af1 || !af2) | |
835 | return 0; | |
7dab83de VY |
836 | |
837 | /* If the socket is IPv6 only, v4 addrs will not match */ | |
52cae8f0 | 838 | if (__ipv6_only_sock(sk) && af1 != af2) |
7dab83de VY |
839 | return 0; |
840 | ||
1da177e4 | 841 | /* Today, wildcard AF_INET/AF_INET6. */ |
52cae8f0 | 842 | if (sctp_is_any(sk, addr1) || sctp_is_any(sk, addr2)) |
1da177e4 LT |
843 | return 1; |
844 | ||
845 | if (addr1->sa.sa_family != addr2->sa.sa_family) | |
846 | return 0; | |
847 | ||
848 | return af1->cmp_addr(addr1, addr2); | |
849 | } | |
850 | ||
851 | /* Verify that the provided sockaddr looks bindable. Common verification, | |
852 | * has already been taken care of. | |
853 | */ | |
854 | static int sctp_inet6_bind_verify(struct sctp_sock *opt, union sctp_addr *addr) | |
855 | { | |
856 | struct sctp_af *af; | |
857 | ||
858 | /* ASSERT: address family has already been verified. */ | |
859 | if (addr->sa.sa_family != AF_INET6) | |
860 | af = sctp_get_af_specific(addr->sa.sa_family); | |
861 | else { | |
1da177e4 | 862 | int type = ipv6_addr_type(&addr->v6.sin6_addr); |
6a6ddb2a SS |
863 | struct net_device *dev; |
864 | ||
1da177e4 | 865 | if (type & IPV6_ADDR_LINKLOCAL) { |
bb2db45b | 866 | struct net *net; |
6a6ddb2a SS |
867 | if (!addr->v6.sin6_scope_id) |
868 | return 0; | |
bb2db45b | 869 | net = sock_net(&opt->inet.sk); |
40c9c31e | 870 | rcu_read_lock(); |
bb2db45b | 871 | dev = dev_get_by_index_rcu(net, addr->v6.sin6_scope_id); |
40c9c31e | 872 | if (!dev || |
bb2db45b | 873 | !ipv6_chk_addr(net, &addr->v6.sin6_addr, dev, 0)) { |
40c9c31e | 874 | rcu_read_unlock(); |
1669d857 VY |
875 | return 0; |
876 | } | |
40c9c31e | 877 | rcu_read_unlock(); |
7dab83de VY |
878 | } else if (type == IPV6_ADDR_MAPPED) { |
879 | if (!opt->v4mapped) | |
880 | return 0; | |
1da177e4 | 881 | } |
7dab83de | 882 | |
1da177e4 LT |
883 | af = opt->pf->af; |
884 | } | |
885 | return af->available(addr, opt); | |
886 | } | |
887 | ||
6a6ddb2a | 888 | /* Verify that the provided sockaddr looks sendable. Common verification, |
1da177e4 LT |
889 | * has already been taken care of. |
890 | */ | |
891 | static int sctp_inet6_send_verify(struct sctp_sock *opt, union sctp_addr *addr) | |
892 | { | |
893 | struct sctp_af *af = NULL; | |
894 | ||
895 | /* ASSERT: address family has already been verified. */ | |
896 | if (addr->sa.sa_family != AF_INET6) | |
897 | af = sctp_get_af_specific(addr->sa.sa_family); | |
898 | else { | |
1da177e4 | 899 | int type = ipv6_addr_type(&addr->v6.sin6_addr); |
6a6ddb2a SS |
900 | struct net_device *dev; |
901 | ||
1da177e4 | 902 | if (type & IPV6_ADDR_LINKLOCAL) { |
6a6ddb2a SS |
903 | if (!addr->v6.sin6_scope_id) |
904 | return 0; | |
40c9c31e | 905 | rcu_read_lock(); |
bb2db45b | 906 | dev = dev_get_by_index_rcu(sock_net(&opt->inet.sk), |
40c9c31e ED |
907 | addr->v6.sin6_scope_id); |
908 | rcu_read_unlock(); | |
6a6ddb2a | 909 | if (!dev) |
1da177e4 LT |
910 | return 0; |
911 | } | |
912 | af = opt->pf->af; | |
913 | } | |
914 | ||
915 | return af != NULL; | |
916 | } | |
917 | ||
918 | /* Fill in Supported Address Type information for INIT and INIT-ACK | |
919 | * chunks. Note: In the future, we may want to look at sock options | |
920 | * to determine whether a PF_INET6 socket really wants to have IPV4 | |
921 | * addresses. | |
922 | * Returns number of addresses supported. | |
923 | */ | |
924 | static int sctp_inet6_supported_addrs(const struct sctp_sock *opt, | |
3dbe8656 | 925 | __be16 *types) |
1da177e4 | 926 | { |
7dab83de VY |
927 | types[0] = SCTP_PARAM_IPV6_ADDRESS; |
928 | if (!opt || !ipv6_only_sock(sctp_opt2sk(opt))) { | |
929 | types[1] = SCTP_PARAM_IPV4_ADDRESS; | |
930 | return 2; | |
931 | } | |
932 | return 1; | |
1da177e4 LT |
933 | } |
934 | ||
90ddc4f0 | 935 | static const struct proto_ops inet6_seqpacket_ops = { |
543d9cfe ACM |
936 | .family = PF_INET6, |
937 | .owner = THIS_MODULE, | |
938 | .release = inet6_release, | |
939 | .bind = inet6_bind, | |
940 | .connect = inet_dgram_connect, | |
941 | .socketpair = sock_no_socketpair, | |
942 | .accept = inet_accept, | |
943 | .getname = inet6_getname, | |
944 | .poll = sctp_poll, | |
945 | .ioctl = inet6_ioctl, | |
946 | .listen = sctp_inet_listen, | |
947 | .shutdown = inet_shutdown, | |
948 | .setsockopt = sock_common_setsockopt, | |
949 | .getsockopt = sock_common_getsockopt, | |
950 | .sendmsg = inet_sendmsg, | |
951 | .recvmsg = sock_common_recvmsg, | |
952 | .mmap = sock_no_mmap, | |
3fdadf7d | 953 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
954 | .compat_setsockopt = compat_sock_common_setsockopt, |
955 | .compat_getsockopt = compat_sock_common_getsockopt, | |
3fdadf7d | 956 | #endif |
1da177e4 LT |
957 | }; |
958 | ||
959 | static struct inet_protosw sctpv6_seqpacket_protosw = { | |
960 | .type = SOCK_SEQPACKET, | |
961 | .protocol = IPPROTO_SCTP, | |
962 | .prot = &sctpv6_prot, | |
963 | .ops = &inet6_seqpacket_ops, | |
1da177e4 LT |
964 | .no_check = 0, |
965 | .flags = SCTP_PROTOSW_FLAG | |
966 | }; | |
967 | static struct inet_protosw sctpv6_stream_protosw = { | |
968 | .type = SOCK_STREAM, | |
969 | .protocol = IPPROTO_SCTP, | |
970 | .prot = &sctpv6_prot, | |
971 | .ops = &inet6_seqpacket_ops, | |
1da177e4 LT |
972 | .no_check = 0, |
973 | .flags = SCTP_PROTOSW_FLAG, | |
974 | }; | |
975 | ||
e5bbef20 | 976 | static int sctp6_rcv(struct sk_buff *skb) |
1da177e4 | 977 | { |
e5bbef20 | 978 | return sctp_rcv(skb) ? -1 : 0; |
1da177e4 LT |
979 | } |
980 | ||
41135cc8 | 981 | static const struct inet6_protocol sctpv6_protocol = { |
1da177e4 LT |
982 | .handler = sctp6_rcv, |
983 | .err_handler = sctp_v6_err, | |
984 | .flags = INET6_PROTO_NOPOLICY | INET6_PROTO_FINAL, | |
985 | }; | |
986 | ||
15efbe76 | 987 | static struct sctp_af sctp_af_inet6 = { |
543d9cfe ACM |
988 | .sa_family = AF_INET6, |
989 | .sctp_xmit = sctp_v6_xmit, | |
990 | .setsockopt = ipv6_setsockopt, | |
991 | .getsockopt = ipv6_getsockopt, | |
992 | .get_dst = sctp_v6_get_dst, | |
993 | .get_saddr = sctp_v6_get_saddr, | |
994 | .copy_addrlist = sctp_v6_copy_addrlist, | |
995 | .from_skb = sctp_v6_from_skb, | |
996 | .from_sk = sctp_v6_from_sk, | |
997 | .to_sk_saddr = sctp_v6_to_sk_saddr, | |
998 | .to_sk_daddr = sctp_v6_to_sk_daddr, | |
999 | .from_addr_param = sctp_v6_from_addr_param, | |
1000 | .to_addr_param = sctp_v6_to_addr_param, | |
543d9cfe ACM |
1001 | .cmp_addr = sctp_v6_cmp_addr, |
1002 | .scope = sctp_v6_scope, | |
1003 | .addr_valid = sctp_v6_addr_valid, | |
1004 | .inaddr_any = sctp_v6_inaddr_any, | |
1005 | .is_any = sctp_v6_is_any, | |
1006 | .available = sctp_v6_available, | |
1007 | .skb_iif = sctp_v6_skb_iif, | |
1008 | .is_ce = sctp_v6_is_ce, | |
1009 | .seq_dump_addr = sctp_v6_seq_dump_addr, | |
b9031d9d | 1010 | .ecn_capable = sctp_v6_ecn_capable, |
543d9cfe ACM |
1011 | .net_header_len = sizeof(struct ipv6hdr), |
1012 | .sockaddr_len = sizeof(struct sockaddr_in6), | |
3fdadf7d | 1013 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
1014 | .compat_setsockopt = compat_ipv6_setsockopt, |
1015 | .compat_getsockopt = compat_ipv6_getsockopt, | |
3fdadf7d | 1016 | #endif |
1da177e4 LT |
1017 | }; |
1018 | ||
15efbe76 | 1019 | static struct sctp_pf sctp_pf_inet6 = { |
1da177e4 LT |
1020 | .event_msgname = sctp_inet6_event_msgname, |
1021 | .skb_msgname = sctp_inet6_skb_msgname, | |
1022 | .af_supported = sctp_inet6_af_supported, | |
1023 | .cmp_addr = sctp_inet6_cmp_addr, | |
1024 | .bind_verify = sctp_inet6_bind_verify, | |
1025 | .send_verify = sctp_inet6_send_verify, | |
1026 | .supported_addrs = sctp_inet6_supported_addrs, | |
1027 | .create_accept_sk = sctp_v6_create_accept_sk, | |
1028 | .addr_v4map = sctp_v6_addr_v4map, | |
15efbe76 | 1029 | .af = &sctp_af_inet6, |
1da177e4 LT |
1030 | }; |
1031 | ||
827bf122 | 1032 | /* Initialize IPv6 support and register with socket layer. */ |
270637ab | 1033 | void sctp_v6_pf_init(void) |
1da177e4 | 1034 | { |
827bf122 | 1035 | /* Register the SCTP specific PF_INET6 functions. */ |
15efbe76 | 1036 | sctp_register_pf(&sctp_pf_inet6, PF_INET6); |
827bf122 SS |
1037 | |
1038 | /* Register the SCTP specific AF_INET6 functions. */ | |
15efbe76 | 1039 | sctp_register_af(&sctp_af_inet6); |
270637ab VY |
1040 | } |
1041 | ||
1042 | void sctp_v6_pf_exit(void) | |
1043 | { | |
1044 | list_del(&sctp_af_inet6.list); | |
1045 | } | |
1046 | ||
1047 | /* Initialize IPv6 support and register with socket layer. */ | |
1048 | int sctp_v6_protosw_init(void) | |
1049 | { | |
1050 | int rc; | |
827bf122 SS |
1051 | |
1052 | rc = proto_register(&sctpv6_prot, 1); | |
1da177e4 | 1053 | if (rc) |
827bf122 | 1054 | return rc; |
1da177e4 LT |
1055 | |
1056 | /* Add SCTPv6(UDP and TCP style) to inetsw6 linked list. */ | |
1057 | inet6_register_protosw(&sctpv6_seqpacket_protosw); | |
1058 | inet6_register_protosw(&sctpv6_stream_protosw); | |
1059 | ||
827bf122 SS |
1060 | return 0; |
1061 | } | |
1da177e4 | 1062 | |
270637ab VY |
1063 | void sctp_v6_protosw_exit(void) |
1064 | { | |
1065 | inet6_unregister_protosw(&sctpv6_seqpacket_protosw); | |
1066 | inet6_unregister_protosw(&sctpv6_stream_protosw); | |
1067 | proto_unregister(&sctpv6_prot); | |
1068 | } | |
1069 | ||
1070 | ||
827bf122 SS |
1071 | /* Register with inet6 layer. */ |
1072 | int sctp_v6_add_protocol(void) | |
1073 | { | |
1da177e4 LT |
1074 | /* Register notifier for inet6 address additions/deletions. */ |
1075 | register_inet6addr_notifier(&sctp_inet6addr_notifier); | |
827bf122 SS |
1076 | |
1077 | if (inet6_add_protocol(&sctpv6_protocol, IPPROTO_SCTP) < 0) | |
1078 | return -EAGAIN; | |
1079 | ||
1080 | return 0; | |
1da177e4 LT |
1081 | } |
1082 | ||
827bf122 SS |
1083 | /* Unregister with inet6 layer. */ |
1084 | void sctp_v6_del_protocol(void) | |
1085 | { | |
1086 | inet6_del_protocol(&sctpv6_protocol, IPPROTO_SCTP); | |
1087 | unregister_inet6addr_notifier(&sctp_inet6addr_notifier); | |
1da177e4 | 1088 | } |