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); | |
85 | ||
29303547 VY |
86 | /* Event handler for inet6 address addition/deletion events. |
87 | * The sctp_local_addr_list needs to be protocted by a spin lock since | |
88 | * multiple notifiers (say IPv4 and IPv6) may be running at the same | |
89 | * time and thus corrupt the list. | |
90 | * The reader side is protected with RCU. | |
91 | */ | |
24123186 AB |
92 | static int sctp_inet6addr_event(struct notifier_block *this, unsigned long ev, |
93 | void *ptr) | |
29c7cf96 SS |
94 | { |
95 | struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr; | |
29303547 VY |
96 | struct sctp_sockaddr_entry *addr = NULL; |
97 | struct sctp_sockaddr_entry *temp; | |
22626216 | 98 | int found = 0; |
29c7cf96 SS |
99 | |
100 | switch (ev) { | |
101 | case NETDEV_UP: | |
102 | addr = kmalloc(sizeof(struct sctp_sockaddr_entry), GFP_ATOMIC); | |
103 | if (addr) { | |
104 | addr->a.v6.sin6_family = AF_INET6; | |
105 | addr->a.v6.sin6_port = 0; | |
4fe1d58b | 106 | ipv6_addr_copy(&addr->a.v6.sin6_addr, &ifa->addr); |
29c7cf96 | 107 | addr->a.v6.sin6_scope_id = ifa->idev->dev->ifindex; |
29303547 VY |
108 | addr->valid = 1; |
109 | spin_lock_bh(&sctp_local_addr_lock); | |
110 | list_add_tail_rcu(&addr->list, &sctp_local_addr_list); | |
111 | spin_unlock_bh(&sctp_local_addr_lock); | |
29c7cf96 SS |
112 | } |
113 | break; | |
114 | case NETDEV_DOWN: | |
29303547 VY |
115 | spin_lock_bh(&sctp_local_addr_lock); |
116 | list_for_each_entry_safe(addr, temp, | |
117 | &sctp_local_addr_list, list) { | |
a40a7d15 PE |
118 | if (addr->a.sa.sa_family == AF_INET6 && |
119 | ipv6_addr_equal(&addr->a.v6.sin6_addr, | |
120 | &ifa->addr)) { | |
22626216 | 121 | found = 1; |
29303547 VY |
122 | addr->valid = 0; |
123 | list_del_rcu(&addr->list); | |
29c7cf96 SS |
124 | break; |
125 | } | |
126 | } | |
29303547 | 127 | spin_unlock_bh(&sctp_local_addr_lock); |
22626216 | 128 | if (found) |
29303547 | 129 | call_rcu(&addr->rcu, sctp_local_addr_free); |
29c7cf96 SS |
130 | break; |
131 | } | |
132 | ||
133 | return NOTIFY_DONE; | |
134 | } | |
135 | ||
1da177e4 | 136 | static struct notifier_block sctp_inet6addr_notifier = { |
29c7cf96 | 137 | .notifier_call = sctp_inet6addr_event, |
1da177e4 LT |
138 | }; |
139 | ||
140 | /* ICMP error handler. */ | |
141 | SCTP_STATIC void sctp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt, | |
d5fdd6ba | 142 | u8 type, u8 code, int offset, __be32 info) |
1da177e4 LT |
143 | { |
144 | struct inet6_dev *idev; | |
1da177e4 | 145 | struct sock *sk; |
1da177e4 LT |
146 | struct sctp_association *asoc; |
147 | struct sctp_transport *transport; | |
148 | struct ipv6_pinfo *np; | |
2e07fa9c | 149 | sk_buff_data_t saveip, savesctp; |
1da177e4 LT |
150 | int err; |
151 | ||
152 | idev = in6_dev_get(skb->dev); | |
153 | ||
154 | /* Fix up skb to look at the embedded net header. */ | |
b0e380b1 ACM |
155 | saveip = skb->network_header; |
156 | savesctp = skb->transport_header; | |
1ced98e8 | 157 | skb_reset_network_header(skb); |
a27ef749 ACM |
158 | skb_set_transport_header(skb, offset); |
159 | sk = sctp_err_lookup(AF_INET6, skb, sctp_hdr(skb), &asoc, &transport); | |
1da177e4 | 160 | /* Put back, the original pointers. */ |
b0e380b1 ACM |
161 | skb->network_header = saveip; |
162 | skb->transport_header = savesctp; | |
1da177e4 | 163 | if (!sk) { |
e41b5368 | 164 | ICMP6_INC_STATS_BH(dev_net(skb->dev), idev, ICMP6_MIB_INERRORS); |
1da177e4 LT |
165 | goto out; |
166 | } | |
167 | ||
168 | /* Warning: The sock lock is held. Remember to call | |
169 | * sctp_err_finish! | |
170 | */ | |
171 | ||
172 | switch (type) { | |
173 | case ICMPV6_PKT_TOOBIG: | |
174 | sctp_icmp_frag_needed(sk, asoc, transport, ntohl(info)); | |
175 | goto out_unlock; | |
176 | case ICMPV6_PARAMPROB: | |
177 | if (ICMPV6_UNK_NEXTHDR == code) { | |
d1ad1ff2 | 178 | sctp_icmp_proto_unreachable(sk, asoc, transport); |
1da177e4 LT |
179 | goto out_unlock; |
180 | } | |
181 | break; | |
182 | default: | |
183 | break; | |
184 | } | |
185 | ||
186 | np = inet6_sk(sk); | |
187 | icmpv6_err_convert(type, code, &err); | |
188 | if (!sock_owned_by_user(sk) && np->recverr) { | |
189 | sk->sk_err = err; | |
190 | sk->sk_error_report(sk); | |
191 | } else { /* Only an error on timeout */ | |
192 | sk->sk_err_soft = err; | |
193 | } | |
194 | ||
195 | out_unlock: | |
d1ad1ff2 | 196 | sctp_err_finish(sk, asoc); |
1da177e4 LT |
197 | out: |
198 | if (likely(idev != NULL)) | |
199 | in6_dev_put(idev); | |
200 | } | |
201 | ||
202 | /* Based on tcp_v6_xmit() in tcp_ipv6.c. */ | |
f880374c | 203 | static int sctp_v6_xmit(struct sk_buff *skb, struct sctp_transport *transport) |
1da177e4 LT |
204 | { |
205 | struct sock *sk = skb->sk; | |
206 | struct ipv6_pinfo *np = inet6_sk(sk); | |
4c9483b2 | 207 | struct flowi6 fl6; |
1da177e4 | 208 | |
4c9483b2 | 209 | memset(&fl6, 0, sizeof(fl6)); |
1da177e4 | 210 | |
4c9483b2 | 211 | fl6.flowi6_proto = sk->sk_protocol; |
1da177e4 LT |
212 | |
213 | /* Fill in the dest address from the route entry passed with the skb | |
214 | * and the source address from the transport. | |
215 | */ | |
4c9483b2 DM |
216 | ipv6_addr_copy(&fl6.daddr, &transport->ipaddr.v6.sin6_addr); |
217 | ipv6_addr_copy(&fl6.saddr, &transport->saddr.v6.sin6_addr); | |
1da177e4 | 218 | |
4c9483b2 DM |
219 | fl6.flowlabel = np->flow_label; |
220 | IP6_ECN_flow_xmit(sk, fl6.flowlabel); | |
221 | if (ipv6_addr_type(&fl6.saddr) & IPV6_ADDR_LINKLOCAL) | |
222 | fl6.flowi6_oif = transport->saddr.v6.sin6_scope_id; | |
1da177e4 | 223 | else |
4c9483b2 | 224 | fl6.flowi6_oif = sk->sk_bound_dev_if; |
1da177e4 LT |
225 | |
226 | if (np->opt && np->opt->srcrt) { | |
227 | struct rt0_hdr *rt0 = (struct rt0_hdr *) np->opt->srcrt; | |
4c9483b2 | 228 | ipv6_addr_copy(&fl6.daddr, rt0->addr); |
1da177e4 LT |
229 | } |
230 | ||
5b095d98 | 231 | SCTP_DEBUG_PRINTK("%s: skb:%p, len:%d, src:%pI6 dst:%pI6\n", |
0dc47877 | 232 | __func__, skb, skb->len, |
4c9483b2 | 233 | &fl6.saddr, &fl6.daddr); |
1da177e4 LT |
234 | |
235 | SCTP_INC_STATS(SCTP_MIB_OUTSCTPPACKS); | |
236 | ||
f880374c HX |
237 | if (!(transport->param_flags & SPP_PMTUD_ENABLE)) |
238 | skb->local_df = 1; | |
239 | ||
4c9483b2 | 240 | return ip6_xmit(sk, skb, &fl6, np->opt); |
1da177e4 LT |
241 | } |
242 | ||
243 | /* Returns the dst cache entry for the given source and destination ip | |
244 | * addresses. | |
245 | */ | |
246 | static struct dst_entry *sctp_v6_get_dst(struct sctp_association *asoc, | |
247 | union sctp_addr *daddr, | |
248 | union sctp_addr *saddr) | |
249 | { | |
62503411 | 250 | struct dst_entry *dst = NULL; |
4c9483b2 | 251 | struct flowi6 fl6; |
62503411 WS |
252 | struct sctp_bind_addr *bp; |
253 | struct sctp_sockaddr_entry *laddr; | |
254 | union sctp_addr *baddr = NULL; | |
255 | __u8 matchlen = 0; | |
256 | __u8 bmatchlen; | |
257 | sctp_scope_t scope; | |
1da177e4 | 258 | |
4c9483b2 DM |
259 | memset(&fl6, 0, sizeof(fl6)); |
260 | ipv6_addr_copy(&fl6.daddr, &daddr->v6.sin6_addr); | |
1da177e4 | 261 | if (ipv6_addr_type(&daddr->v6.sin6_addr) & IPV6_ADDR_LINKLOCAL) |
4c9483b2 | 262 | fl6.flowi6_oif = daddr->v6.sin6_scope_id; |
d808ad9a | 263 | |
1da177e4 | 264 | |
4c9483b2 | 265 | SCTP_DEBUG_PRINTK("%s: DST=%pI6 ", __func__, &fl6.daddr); |
1da177e4 LT |
266 | |
267 | if (saddr) { | |
4c9483b2 DM |
268 | ipv6_addr_copy(&fl6.saddr, &saddr->v6.sin6_addr); |
269 | SCTP_DEBUG_PRINTK("SRC=%pI6 - ", &fl6.saddr); | |
1da177e4 LT |
270 | } |
271 | ||
4c9483b2 | 272 | dst = ip6_route_output(&init_net, NULL, &fl6); |
62503411 WS |
273 | if (!asoc || saddr) |
274 | goto out; | |
275 | ||
276 | if (dst->error) { | |
277 | dst_release(dst); | |
278 | dst = NULL; | |
279 | bp = &asoc->base.bind_addr; | |
280 | scope = sctp_scope(daddr); | |
281 | /* Walk through the bind address list and try to get a dst that | |
282 | * matches a bind address as the source address. | |
283 | */ | |
284 | rcu_read_lock(); | |
285 | list_for_each_entry_rcu(laddr, &bp->address_list, list) { | |
286 | if (!laddr->valid) | |
287 | continue; | |
288 | if ((laddr->state == SCTP_ADDR_SRC) && | |
289 | (laddr->a.sa.sa_family == AF_INET6) && | |
290 | (scope <= sctp_scope(&laddr->a))) { | |
291 | bmatchlen = sctp_v6_addr_match_len(daddr, | |
292 | &laddr->a); | |
293 | if (!baddr || (matchlen < bmatchlen)) { | |
294 | baddr = &laddr->a; | |
295 | matchlen = bmatchlen; | |
296 | } | |
297 | } | |
298 | } | |
299 | rcu_read_unlock(); | |
300 | if (baddr) { | |
301 | ipv6_addr_copy(&fl6.saddr, &baddr->v6.sin6_addr); | |
302 | dst = ip6_route_output(&init_net, NULL, &fl6); | |
303 | } | |
304 | } | |
305 | out: | |
4251320f | 306 | if (!dst->error) { |
1da177e4 LT |
307 | struct rt6_info *rt; |
308 | rt = (struct rt6_info *)dst; | |
5b095d98 | 309 | SCTP_DEBUG_PRINTK("rt6_dst:%pI6 rt6_src:%pI6\n", |
fdb46ee7 | 310 | &rt->rt6i_dst.addr, &rt->rt6i_src.addr); |
4251320f | 311 | return dst; |
1da177e4 | 312 | } |
4251320f VN |
313 | SCTP_DEBUG_PRINTK("NO ROUTE\n"); |
314 | dst_release(dst); | |
315 | return NULL; | |
1da177e4 LT |
316 | } |
317 | ||
318 | /* Returns the number of consecutive initial bits that match in the 2 ipv6 | |
319 | * addresses. | |
320 | */ | |
321 | static inline int sctp_v6_addr_match_len(union sctp_addr *s1, | |
322 | union sctp_addr *s2) | |
323 | { | |
de7737e0 | 324 | return ipv6_addr_diff(&s1->v6.sin6_addr, &s2->v6.sin6_addr); |
1da177e4 LT |
325 | } |
326 | ||
327 | /* Fills in the source address(saddr) based on the destination address(daddr) | |
328 | * and asoc's bind address list. | |
329 | */ | |
e5117101 YH |
330 | static void sctp_v6_get_saddr(struct sctp_sock *sk, |
331 | struct sctp_association *asoc, | |
1da177e4 LT |
332 | struct dst_entry *dst, |
333 | union sctp_addr *daddr, | |
334 | union sctp_addr *saddr) | |
335 | { | |
336 | struct sctp_bind_addr *bp; | |
1da177e4 | 337 | struct sctp_sockaddr_entry *laddr; |
1da177e4 LT |
338 | sctp_scope_t scope; |
339 | union sctp_addr *baddr = NULL; | |
340 | __u8 matchlen = 0; | |
341 | __u8 bmatchlen; | |
342 | ||
5b095d98 | 343 | SCTP_DEBUG_PRINTK("%s: asoc:%p dst:%p daddr:%pI6 ", |
fdb46ee7 | 344 | __func__, asoc, dst, &daddr->v6.sin6_addr); |
1da177e4 LT |
345 | |
346 | if (!asoc) { | |
191cd582 BH |
347 | ipv6_dev_get_saddr(sock_net(sctp_opt2sk(sk)), |
348 | dst ? ip6_dst_idev(dst)->dev : NULL, | |
7cbca67c | 349 | &daddr->v6.sin6_addr, |
e5117101 | 350 | inet6_sk(&sk->inet.sk)->srcprefs, |
7cbca67c | 351 | &saddr->v6.sin6_addr); |
5b095d98 | 352 | SCTP_DEBUG_PRINTK("saddr from ipv6_get_saddr: %pI6\n", |
fdb46ee7 | 353 | &saddr->v6.sin6_addr); |
1da177e4 LT |
354 | return; |
355 | } | |
356 | ||
357 | scope = sctp_scope(daddr); | |
358 | ||
359 | bp = &asoc->base.bind_addr; | |
1da177e4 LT |
360 | |
361 | /* Go through the bind address list and find the best source address | |
362 | * that matches the scope of the destination address. | |
363 | */ | |
559cf710 VY |
364 | rcu_read_lock(); |
365 | list_for_each_entry_rcu(laddr, &bp->address_list, list) { | |
366 | if (!laddr->valid) | |
367 | continue; | |
f57d96b2 | 368 | if ((laddr->state == SCTP_ADDR_SRC) && |
6244be4e AV |
369 | (laddr->a.sa.sa_family == AF_INET6) && |
370 | (scope <= sctp_scope(&laddr->a))) { | |
d3f7a54a | 371 | bmatchlen = sctp_v6_addr_match_len(daddr, &laddr->a); |
1da177e4 | 372 | if (!baddr || (matchlen < bmatchlen)) { |
d3f7a54a | 373 | baddr = &laddr->a; |
1da177e4 LT |
374 | matchlen = bmatchlen; |
375 | } | |
376 | } | |
377 | } | |
378 | ||
379 | if (baddr) { | |
380 | memcpy(saddr, baddr, sizeof(union sctp_addr)); | |
5b095d98 | 381 | SCTP_DEBUG_PRINTK("saddr: %pI6\n", &saddr->v6.sin6_addr); |
1da177e4 | 382 | } else { |
145ce502 | 383 | pr_err("%s: asoc:%p Could not find a valid source " |
5b095d98 | 384 | "address for the dest:%pI6\n", |
fdb46ee7 | 385 | __func__, asoc, &daddr->v6.sin6_addr); |
1da177e4 LT |
386 | } |
387 | ||
559cf710 | 388 | rcu_read_unlock(); |
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 LT |
407 | /* Add the address to the local list. */ |
408 | addr = t_new(struct sctp_sockaddr_entry, GFP_ATOMIC); | |
409 | if (addr) { | |
2a6fd78a AV |
410 | addr->a.v6.sin6_family = AF_INET6; |
411 | addr->a.v6.sin6_port = 0; | |
486f50ca | 412 | ipv6_addr_copy(&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 | { | |
428 | void *from; | |
d55c41b1 | 429 | __be16 *port; |
1da177e4 LT |
430 | struct sctphdr *sh; |
431 | ||
432 | port = &addr->v6.sin6_port; | |
433 | addr->v6.sin6_family = AF_INET6; | |
434 | addr->v6.sin6_flowinfo = 0; /* FIXME */ | |
435 | addr->v6.sin6_scope_id = ((struct inet6_skb_parm *)skb->cb)->iif; | |
436 | ||
2c0fd387 | 437 | sh = sctp_hdr(skb); |
1da177e4 | 438 | if (is_saddr) { |
d55c41b1 | 439 | *port = sh->source; |
0660e03f | 440 | from = &ipv6_hdr(skb)->saddr; |
1da177e4 | 441 | } else { |
d55c41b1 | 442 | *port = sh->dest; |
0660e03f | 443 | from = &ipv6_hdr(skb)->daddr; |
1da177e4 LT |
444 | } |
445 | ipv6_addr_copy(&addr->v6.sin6_addr, from); | |
446 | } | |
447 | ||
448 | /* Initialize an sctp_addr from a socket. */ | |
449 | static void sctp_v6_from_sk(union sctp_addr *addr, struct sock *sk) | |
450 | { | |
451 | addr->v6.sin6_family = AF_INET6; | |
7dcdbd95 | 452 | addr->v6.sin6_port = 0; |
486f50ca | 453 | ipv6_addr_copy(&addr->v6.sin6_addr, &inet6_sk(sk)->rcv_saddr); |
1da177e4 LT |
454 | } |
455 | ||
456 | /* Initialize sk->sk_rcv_saddr from sctp_addr. */ | |
457 | static void sctp_v6_to_sk_saddr(union sctp_addr *addr, struct sock *sk) | |
458 | { | |
459 | if (addr->sa.sa_family == AF_INET && sctp_sk(sk)->v4mapped) { | |
460 | inet6_sk(sk)->rcv_saddr.s6_addr32[0] = 0; | |
461 | inet6_sk(sk)->rcv_saddr.s6_addr32[1] = 0; | |
462 | inet6_sk(sk)->rcv_saddr.s6_addr32[2] = htonl(0x0000ffff); | |
463 | inet6_sk(sk)->rcv_saddr.s6_addr32[3] = | |
464 | addr->v4.sin_addr.s_addr; | |
465 | } else { | |
486f50ca | 466 | ipv6_addr_copy(&inet6_sk(sk)->rcv_saddr, &addr->v6.sin6_addr); |
1da177e4 LT |
467 | } |
468 | } | |
469 | ||
470 | /* Initialize sk->sk_daddr from sctp_addr. */ | |
471 | static void sctp_v6_to_sk_daddr(union sctp_addr *addr, struct sock *sk) | |
472 | { | |
473 | if (addr->sa.sa_family == AF_INET && sctp_sk(sk)->v4mapped) { | |
474 | inet6_sk(sk)->daddr.s6_addr32[0] = 0; | |
475 | inet6_sk(sk)->daddr.s6_addr32[1] = 0; | |
476 | inet6_sk(sk)->daddr.s6_addr32[2] = htonl(0x0000ffff); | |
477 | inet6_sk(sk)->daddr.s6_addr32[3] = addr->v4.sin_addr.s_addr; | |
478 | } else { | |
486f50ca | 479 | ipv6_addr_copy(&inet6_sk(sk)->daddr, &addr->v6.sin6_addr); |
1da177e4 LT |
480 | } |
481 | } | |
482 | ||
483 | /* Initialize a sctp_addr from an address parameter. */ | |
484 | static void sctp_v6_from_addr_param(union sctp_addr *addr, | |
485 | union sctp_addr_param *param, | |
dd86d136 | 486 | __be16 port, int iif) |
1da177e4 LT |
487 | { |
488 | addr->v6.sin6_family = AF_INET6; | |
489 | addr->v6.sin6_port = port; | |
490 | addr->v6.sin6_flowinfo = 0; /* BUG */ | |
491 | ipv6_addr_copy(&addr->v6.sin6_addr, ¶m->v6.addr); | |
492 | addr->v6.sin6_scope_id = iif; | |
493 | } | |
494 | ||
495 | /* Initialize an address parameter from a sctp_addr and return the length | |
496 | * of the address parameter. | |
497 | */ | |
498 | static int sctp_v6_to_addr_param(const union sctp_addr *addr, | |
499 | union sctp_addr_param *param) | |
500 | { | |
501 | int length = sizeof(sctp_ipv6addr_param_t); | |
502 | ||
503 | param->v6.param_hdr.type = SCTP_PARAM_IPV6_ADDRESS; | |
dbc16db1 | 504 | param->v6.param_hdr.length = htons(length); |
1da177e4 LT |
505 | ipv6_addr_copy(¶m->v6.addr, &addr->v6.sin6_addr); |
506 | ||
507 | return length; | |
508 | } | |
509 | ||
510 | /* Initialize a sctp_addr from a dst_entry. */ | |
511 | static void sctp_v6_dst_saddr(union sctp_addr *addr, struct dst_entry *dst, | |
854d43a4 | 512 | __be16 port) |
1da177e4 LT |
513 | { |
514 | struct rt6_info *rt = (struct rt6_info *)dst; | |
515 | addr->sa.sa_family = AF_INET6; | |
516 | addr->v6.sin6_port = port; | |
517 | ipv6_addr_copy(&addr->v6.sin6_addr, &rt->rt6i_src.addr); | |
518 | } | |
519 | ||
520 | /* Compare addresses exactly. | |
521 | * v4-mapped-v6 is also in consideration. | |
522 | */ | |
523 | static int sctp_v6_cmp_addr(const union sctp_addr *addr1, | |
524 | const union sctp_addr *addr2) | |
525 | { | |
526 | if (addr1->sa.sa_family != addr2->sa.sa_family) { | |
527 | if (addr1->sa.sa_family == AF_INET && | |
528 | addr2->sa.sa_family == AF_INET6 && | |
e773e4fa | 529 | ipv6_addr_v4mapped(&addr2->v6.sin6_addr)) { |
1da177e4 LT |
530 | if (addr2->v6.sin6_port == addr1->v4.sin_port && |
531 | addr2->v6.sin6_addr.s6_addr32[3] == | |
532 | addr1->v4.sin_addr.s_addr) | |
533 | return 1; | |
534 | } | |
535 | if (addr2->sa.sa_family == AF_INET && | |
536 | addr1->sa.sa_family == AF_INET6 && | |
e773e4fa | 537 | ipv6_addr_v4mapped(&addr1->v6.sin6_addr)) { |
1da177e4 LT |
538 | if (addr1->v6.sin6_port == addr2->v4.sin_port && |
539 | addr1->v6.sin6_addr.s6_addr32[3] == | |
540 | addr2->v4.sin_addr.s_addr) | |
541 | return 1; | |
542 | } | |
543 | return 0; | |
544 | } | |
545 | if (!ipv6_addr_equal(&addr1->v6.sin6_addr, &addr2->v6.sin6_addr)) | |
546 | return 0; | |
547 | /* If this is a linklocal address, compare the scope_id. */ | |
548 | if (ipv6_addr_type(&addr1->v6.sin6_addr) & IPV6_ADDR_LINKLOCAL) { | |
549 | if (addr1->v6.sin6_scope_id && addr2->v6.sin6_scope_id && | |
550 | (addr1->v6.sin6_scope_id != addr2->v6.sin6_scope_id)) { | |
551 | return 0; | |
552 | } | |
553 | } | |
554 | ||
555 | return 1; | |
556 | } | |
557 | ||
558 | /* Initialize addr struct to INADDR_ANY. */ | |
6fbfa9f9 | 559 | static void sctp_v6_inaddr_any(union sctp_addr *addr, __be16 port) |
1da177e4 LT |
560 | { |
561 | memset(addr, 0x00, sizeof(union sctp_addr)); | |
562 | addr->v6.sin6_family = AF_INET6; | |
563 | addr->v6.sin6_port = port; | |
564 | } | |
565 | ||
566 | /* Is this a wildcard address? */ | |
567 | static int sctp_v6_is_any(const union sctp_addr *addr) | |
568 | { | |
b9b9e10f | 569 | return ipv6_addr_any(&addr->v6.sin6_addr); |
1da177e4 LT |
570 | } |
571 | ||
572 | /* Should this be available for binding? */ | |
573 | static int sctp_v6_available(union sctp_addr *addr, struct sctp_sock *sp) | |
574 | { | |
575 | int type; | |
b71d1d42 | 576 | const struct in6_addr *in6 = (const struct in6_addr *)&addr->v6.sin6_addr; |
1da177e4 LT |
577 | |
578 | type = ipv6_addr_type(in6); | |
579 | if (IPV6_ADDR_ANY == type) | |
580 | return 1; | |
581 | if (type == IPV6_ADDR_MAPPED) { | |
582 | if (sp && !sp->v4mapped) | |
583 | return 0; | |
584 | if (sp && ipv6_only_sock(sctp_opt2sk(sp))) | |
585 | return 0; | |
586 | sctp_v6_map_v4(addr); | |
587 | return sctp_get_af_specific(AF_INET)->available(addr, sp); | |
588 | } | |
589 | if (!(type & IPV6_ADDR_UNICAST)) | |
590 | return 0; | |
591 | ||
bfeade08 | 592 | return ipv6_chk_addr(&init_net, in6, NULL, 0); |
1da177e4 LT |
593 | } |
594 | ||
595 | /* This function checks if the address is a valid address to be used for | |
596 | * SCTP. | |
597 | * | |
598 | * Output: | |
599 | * Return 0 - If the address is a non-unicast or an illegal address. | |
600 | * Return 1 - If the address is a unicast. | |
601 | */ | |
5636bef7 VY |
602 | static int sctp_v6_addr_valid(union sctp_addr *addr, |
603 | struct sctp_sock *sp, | |
604 | const struct sk_buff *skb) | |
1da177e4 LT |
605 | { |
606 | int ret = ipv6_addr_type(&addr->v6.sin6_addr); | |
607 | ||
608 | /* Support v4-mapped-v6 address. */ | |
609 | if (ret == IPV6_ADDR_MAPPED) { | |
610 | /* Note: This routine is used in input, so v4-mapped-v6 | |
611 | * are disallowed here when there is no sctp_sock. | |
612 | */ | |
613 | if (!sp || !sp->v4mapped) | |
614 | return 0; | |
615 | if (sp && ipv6_only_sock(sctp_opt2sk(sp))) | |
616 | return 0; | |
617 | sctp_v6_map_v4(addr); | |
5636bef7 | 618 | return sctp_get_af_specific(AF_INET)->addr_valid(addr, sp, skb); |
1da177e4 LT |
619 | } |
620 | ||
621 | /* Is this a non-unicast address */ | |
622 | if (!(ret & IPV6_ADDR_UNICAST)) | |
623 | return 0; | |
624 | ||
625 | return 1; | |
626 | } | |
627 | ||
628 | /* What is the scope of 'addr'? */ | |
629 | static sctp_scope_t sctp_v6_scope(union sctp_addr *addr) | |
630 | { | |
631 | int v6scope; | |
632 | sctp_scope_t retval; | |
633 | ||
634 | /* The IPv6 scope is really a set of bit fields. | |
635 | * See IFA_* in <net/if_inet6.h>. Map to a generic SCTP scope. | |
636 | */ | |
637 | ||
638 | v6scope = ipv6_addr_scope(&addr->v6.sin6_addr); | |
639 | switch (v6scope) { | |
640 | case IFA_HOST: | |
641 | retval = SCTP_SCOPE_LOOPBACK; | |
642 | break; | |
643 | case IFA_LINK: | |
644 | retval = SCTP_SCOPE_LINK; | |
645 | break; | |
646 | case IFA_SITE: | |
647 | retval = SCTP_SCOPE_PRIVATE; | |
648 | break; | |
649 | default: | |
650 | retval = SCTP_SCOPE_GLOBAL; | |
651 | break; | |
3ff50b79 | 652 | } |
1da177e4 LT |
653 | |
654 | return retval; | |
655 | } | |
656 | ||
657 | /* Create and initialize a new sk for the socket to be returned by accept(). */ | |
658 | static struct sock *sctp_v6_create_accept_sk(struct sock *sk, | |
659 | struct sctp_association *asoc) | |
660 | { | |
1da177e4 | 661 | struct sock *newsk; |
1da177e4 LT |
662 | struct ipv6_pinfo *newnp, *np = inet6_sk(sk); |
663 | struct sctp6_sock *newsctp6sk; | |
664 | ||
3b1e0a65 | 665 | newsk = sk_alloc(sock_net(sk), PF_INET6, GFP_KERNEL, sk->sk_prot); |
1da177e4 LT |
666 | if (!newsk) |
667 | goto out; | |
668 | ||
669 | sock_init_data(NULL, newsk); | |
670 | ||
914e1c8b | 671 | sctp_copy_sock(newsk, sk, asoc); |
1da177e4 LT |
672 | sock_reset_flag(sk, SOCK_ZAPPED); |
673 | ||
674 | newsctp6sk = (struct sctp6_sock *)newsk; | |
675 | inet_sk(newsk)->pinet6 = &newsctp6sk->inet6; | |
676 | ||
b225b884 DJ |
677 | sctp_sk(newsk)->v4mapped = sctp_sk(sk)->v4mapped; |
678 | ||
1da177e4 LT |
679 | newnp = inet6_sk(newsk); |
680 | ||
681 | memcpy(newnp, np, sizeof(struct ipv6_pinfo)); | |
682 | ||
683 | /* Initialize sk's sport, dport, rcv_saddr and daddr for getsockname() | |
684 | * and getpeername(). | |
685 | */ | |
1da177e4 LT |
686 | sctp_v6_to_sk_daddr(&asoc->peer.primary_addr, newsk); |
687 | ||
e6848976 | 688 | sk_refcnt_debug_inc(newsk); |
1da177e4 LT |
689 | |
690 | if (newsk->sk_prot->init(newsk)) { | |
691 | sk_common_release(newsk); | |
692 | newsk = NULL; | |
693 | } | |
694 | ||
695 | out: | |
696 | return newsk; | |
697 | } | |
698 | ||
699 | /* Map v4 address to mapped v6 address */ | |
700 | static void sctp_v6_addr_v4map(struct sctp_sock *sp, union sctp_addr *addr) | |
701 | { | |
702 | if (sp->v4mapped && AF_INET == addr->sa.sa_family) | |
703 | sctp_v4_map_v6(addr); | |
704 | } | |
705 | ||
706 | /* Where did this skb come from? */ | |
707 | static int sctp_v6_skb_iif(const struct sk_buff *skb) | |
708 | { | |
709 | struct inet6_skb_parm *opt = (struct inet6_skb_parm *) skb->cb; | |
710 | return opt->iif; | |
711 | } | |
712 | ||
713 | /* Was this packet marked by Explicit Congestion Notification? */ | |
714 | static int sctp_v6_is_ce(const struct sk_buff *skb) | |
715 | { | |
0660e03f | 716 | return *((__u32 *)(ipv6_hdr(skb))) & htonl(1 << 20); |
1da177e4 LT |
717 | } |
718 | ||
719 | /* Dump the v6 addr to the seq file. */ | |
720 | static void sctp_v6_seq_dump_addr(struct seq_file *seq, union sctp_addr *addr) | |
721 | { | |
5b095d98 | 722 | seq_printf(seq, "%pI6 ", &addr->v6.sin6_addr); |
1da177e4 LT |
723 | } |
724 | ||
b9031d9d VY |
725 | static void sctp_v6_ecn_capable(struct sock *sk) |
726 | { | |
727 | inet6_sk(sk)->tclass |= INET_ECN_ECT_0; | |
728 | } | |
729 | ||
1da177e4 LT |
730 | /* Initialize a PF_INET6 socket msg_name. */ |
731 | static void sctp_inet6_msgname(char *msgname, int *addr_len) | |
732 | { | |
733 | struct sockaddr_in6 *sin6; | |
734 | ||
735 | sin6 = (struct sockaddr_in6 *)msgname; | |
736 | sin6->sin6_family = AF_INET6; | |
737 | sin6->sin6_flowinfo = 0; | |
738 | sin6->sin6_scope_id = 0; /*FIXME */ | |
739 | *addr_len = sizeof(struct sockaddr_in6); | |
740 | } | |
741 | ||
742 | /* Initialize a PF_INET msgname from a ulpevent. */ | |
743 | static void sctp_inet6_event_msgname(struct sctp_ulpevent *event, | |
744 | char *msgname, int *addrlen) | |
745 | { | |
746 | struct sockaddr_in6 *sin6, *sin6from; | |
747 | ||
748 | if (msgname) { | |
749 | union sctp_addr *addr; | |
750 | struct sctp_association *asoc; | |
751 | ||
752 | asoc = event->asoc; | |
753 | sctp_inet6_msgname(msgname, addrlen); | |
754 | sin6 = (struct sockaddr_in6 *)msgname; | |
755 | sin6->sin6_port = htons(asoc->peer.port); | |
756 | addr = &asoc->peer.primary_addr; | |
757 | ||
758 | /* Note: If we go to a common v6 format, this code | |
759 | * will change. | |
760 | */ | |
761 | ||
762 | /* Map ipv4 address into v4-mapped-on-v6 address. */ | |
763 | if (sctp_sk(asoc->base.sk)->v4mapped && | |
764 | AF_INET == addr->sa.sa_family) { | |
765 | sctp_v4_map_v6((union sctp_addr *)sin6); | |
766 | sin6->sin6_addr.s6_addr32[3] = | |
767 | addr->v4.sin_addr.s_addr; | |
768 | return; | |
769 | } | |
770 | ||
771 | sin6from = &asoc->peer.primary_addr.v6; | |
772 | ipv6_addr_copy(&sin6->sin6_addr, &sin6from->sin6_addr); | |
773 | if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) | |
774 | sin6->sin6_scope_id = sin6from->sin6_scope_id; | |
775 | } | |
776 | } | |
777 | ||
778 | /* Initialize a msg_name from an inbound skb. */ | |
779 | static void sctp_inet6_skb_msgname(struct sk_buff *skb, char *msgname, | |
780 | int *addr_len) | |
781 | { | |
782 | struct sctphdr *sh; | |
783 | struct sockaddr_in6 *sin6; | |
784 | ||
785 | if (msgname) { | |
786 | sctp_inet6_msgname(msgname, addr_len); | |
787 | sin6 = (struct sockaddr_in6 *)msgname; | |
2c0fd387 | 788 | sh = sctp_hdr(skb); |
1da177e4 LT |
789 | sin6->sin6_port = sh->source; |
790 | ||
791 | /* Map ipv4 address into v4-mapped-on-v6 address. */ | |
792 | if (sctp_sk(skb->sk)->v4mapped && | |
eddc9ec5 | 793 | ip_hdr(skb)->version == 4) { |
1da177e4 | 794 | sctp_v4_map_v6((union sctp_addr *)sin6); |
eddc9ec5 | 795 | sin6->sin6_addr.s6_addr32[3] = ip_hdr(skb)->saddr; |
1da177e4 LT |
796 | return; |
797 | } | |
798 | ||
799 | /* Otherwise, just copy the v6 address. */ | |
0660e03f | 800 | ipv6_addr_copy(&sin6->sin6_addr, &ipv6_hdr(skb)->saddr); |
1da177e4 LT |
801 | if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) { |
802 | struct sctp_ulpevent *ev = sctp_skb2event(skb); | |
803 | sin6->sin6_scope_id = ev->iif; | |
804 | } | |
805 | } | |
806 | } | |
807 | ||
808 | /* Do we support this AF? */ | |
809 | static int sctp_inet6_af_supported(sa_family_t family, struct sctp_sock *sp) | |
810 | { | |
811 | switch (family) { | |
812 | case AF_INET6: | |
813 | return 1; | |
814 | /* v4-mapped-v6 addresses */ | |
815 | case AF_INET: | |
7dab83de | 816 | if (!__ipv6_only_sock(sctp_opt2sk(sp))) |
1da177e4 LT |
817 | return 1; |
818 | default: | |
819 | return 0; | |
820 | } | |
821 | } | |
822 | ||
823 | /* Address matching with wildcards allowed. This extra level | |
824 | * of indirection lets us choose whether a PF_INET6 should | |
825 | * disallow any v4 addresses if we so choose. | |
826 | */ | |
827 | static int sctp_inet6_cmp_addr(const union sctp_addr *addr1, | |
828 | const union sctp_addr *addr2, | |
829 | struct sctp_sock *opt) | |
830 | { | |
831 | struct sctp_af *af1, *af2; | |
52cae8f0 | 832 | struct sock *sk = sctp_opt2sk(opt); |
1da177e4 LT |
833 | |
834 | af1 = sctp_get_af_specific(addr1->sa.sa_family); | |
835 | af2 = sctp_get_af_specific(addr2->sa.sa_family); | |
836 | ||
837 | if (!af1 || !af2) | |
838 | return 0; | |
7dab83de VY |
839 | |
840 | /* If the socket is IPv6 only, v4 addrs will not match */ | |
52cae8f0 | 841 | if (__ipv6_only_sock(sk) && af1 != af2) |
7dab83de VY |
842 | return 0; |
843 | ||
1da177e4 | 844 | /* Today, wildcard AF_INET/AF_INET6. */ |
52cae8f0 | 845 | if (sctp_is_any(sk, addr1) || sctp_is_any(sk, addr2)) |
1da177e4 LT |
846 | return 1; |
847 | ||
848 | if (addr1->sa.sa_family != addr2->sa.sa_family) | |
849 | return 0; | |
850 | ||
851 | return af1->cmp_addr(addr1, addr2); | |
852 | } | |
853 | ||
854 | /* Verify that the provided sockaddr looks bindable. Common verification, | |
855 | * has already been taken care of. | |
856 | */ | |
857 | static int sctp_inet6_bind_verify(struct sctp_sock *opt, union sctp_addr *addr) | |
858 | { | |
859 | struct sctp_af *af; | |
860 | ||
861 | /* ASSERT: address family has already been verified. */ | |
862 | if (addr->sa.sa_family != AF_INET6) | |
863 | af = sctp_get_af_specific(addr->sa.sa_family); | |
864 | else { | |
1da177e4 | 865 | int type = ipv6_addr_type(&addr->v6.sin6_addr); |
6a6ddb2a SS |
866 | struct net_device *dev; |
867 | ||
1da177e4 | 868 | if (type & IPV6_ADDR_LINKLOCAL) { |
6a6ddb2a SS |
869 | if (!addr->v6.sin6_scope_id) |
870 | return 0; | |
40c9c31e ED |
871 | rcu_read_lock(); |
872 | dev = dev_get_by_index_rcu(&init_net, | |
873 | addr->v6.sin6_scope_id); | |
874 | if (!dev || | |
875 | !ipv6_chk_addr(&init_net, &addr->v6.sin6_addr, | |
bfeade08 | 876 | dev, 0)) { |
40c9c31e | 877 | rcu_read_unlock(); |
1669d857 VY |
878 | return 0; |
879 | } | |
40c9c31e | 880 | rcu_read_unlock(); |
7dab83de VY |
881 | } else if (type == IPV6_ADDR_MAPPED) { |
882 | if (!opt->v4mapped) | |
883 | return 0; | |
1da177e4 | 884 | } |
7dab83de | 885 | |
1da177e4 LT |
886 | af = opt->pf->af; |
887 | } | |
888 | return af->available(addr, opt); | |
889 | } | |
890 | ||
6a6ddb2a | 891 | /* Verify that the provided sockaddr looks sendable. Common verification, |
1da177e4 LT |
892 | * has already been taken care of. |
893 | */ | |
894 | static int sctp_inet6_send_verify(struct sctp_sock *opt, union sctp_addr *addr) | |
895 | { | |
896 | struct sctp_af *af = NULL; | |
897 | ||
898 | /* ASSERT: address family has already been verified. */ | |
899 | if (addr->sa.sa_family != AF_INET6) | |
900 | af = sctp_get_af_specific(addr->sa.sa_family); | |
901 | else { | |
1da177e4 | 902 | int type = ipv6_addr_type(&addr->v6.sin6_addr); |
6a6ddb2a SS |
903 | struct net_device *dev; |
904 | ||
1da177e4 | 905 | if (type & IPV6_ADDR_LINKLOCAL) { |
6a6ddb2a SS |
906 | if (!addr->v6.sin6_scope_id) |
907 | return 0; | |
40c9c31e ED |
908 | rcu_read_lock(); |
909 | dev = dev_get_by_index_rcu(&init_net, | |
910 | addr->v6.sin6_scope_id); | |
911 | rcu_read_unlock(); | |
6a6ddb2a | 912 | if (!dev) |
1da177e4 LT |
913 | return 0; |
914 | } | |
915 | af = opt->pf->af; | |
916 | } | |
917 | ||
918 | return af != NULL; | |
919 | } | |
920 | ||
921 | /* Fill in Supported Address Type information for INIT and INIT-ACK | |
922 | * chunks. Note: In the future, we may want to look at sock options | |
923 | * to determine whether a PF_INET6 socket really wants to have IPV4 | |
924 | * addresses. | |
925 | * Returns number of addresses supported. | |
926 | */ | |
927 | static int sctp_inet6_supported_addrs(const struct sctp_sock *opt, | |
3dbe8656 | 928 | __be16 *types) |
1da177e4 | 929 | { |
7dab83de VY |
930 | types[0] = SCTP_PARAM_IPV6_ADDRESS; |
931 | if (!opt || !ipv6_only_sock(sctp_opt2sk(opt))) { | |
932 | types[1] = SCTP_PARAM_IPV4_ADDRESS; | |
933 | return 2; | |
934 | } | |
935 | return 1; | |
1da177e4 LT |
936 | } |
937 | ||
90ddc4f0 | 938 | static const struct proto_ops inet6_seqpacket_ops = { |
543d9cfe ACM |
939 | .family = PF_INET6, |
940 | .owner = THIS_MODULE, | |
941 | .release = inet6_release, | |
942 | .bind = inet6_bind, | |
943 | .connect = inet_dgram_connect, | |
944 | .socketpair = sock_no_socketpair, | |
945 | .accept = inet_accept, | |
946 | .getname = inet6_getname, | |
947 | .poll = sctp_poll, | |
948 | .ioctl = inet6_ioctl, | |
949 | .listen = sctp_inet_listen, | |
950 | .shutdown = inet_shutdown, | |
951 | .setsockopt = sock_common_setsockopt, | |
952 | .getsockopt = sock_common_getsockopt, | |
953 | .sendmsg = inet_sendmsg, | |
954 | .recvmsg = sock_common_recvmsg, | |
955 | .mmap = sock_no_mmap, | |
3fdadf7d | 956 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
957 | .compat_setsockopt = compat_sock_common_setsockopt, |
958 | .compat_getsockopt = compat_sock_common_getsockopt, | |
3fdadf7d | 959 | #endif |
1da177e4 LT |
960 | }; |
961 | ||
962 | static struct inet_protosw sctpv6_seqpacket_protosw = { | |
963 | .type = SOCK_SEQPACKET, | |
964 | .protocol = IPPROTO_SCTP, | |
965 | .prot = &sctpv6_prot, | |
966 | .ops = &inet6_seqpacket_ops, | |
1da177e4 LT |
967 | .no_check = 0, |
968 | .flags = SCTP_PROTOSW_FLAG | |
969 | }; | |
970 | static struct inet_protosw sctpv6_stream_protosw = { | |
971 | .type = SOCK_STREAM, | |
972 | .protocol = IPPROTO_SCTP, | |
973 | .prot = &sctpv6_prot, | |
974 | .ops = &inet6_seqpacket_ops, | |
1da177e4 LT |
975 | .no_check = 0, |
976 | .flags = SCTP_PROTOSW_FLAG, | |
977 | }; | |
978 | ||
e5bbef20 | 979 | static int sctp6_rcv(struct sk_buff *skb) |
1da177e4 | 980 | { |
e5bbef20 | 981 | return sctp_rcv(skb) ? -1 : 0; |
1da177e4 LT |
982 | } |
983 | ||
41135cc8 | 984 | static const struct inet6_protocol sctpv6_protocol = { |
1da177e4 LT |
985 | .handler = sctp6_rcv, |
986 | .err_handler = sctp_v6_err, | |
987 | .flags = INET6_PROTO_NOPOLICY | INET6_PROTO_FINAL, | |
988 | }; | |
989 | ||
15efbe76 | 990 | static struct sctp_af sctp_af_inet6 = { |
543d9cfe ACM |
991 | .sa_family = AF_INET6, |
992 | .sctp_xmit = sctp_v6_xmit, | |
993 | .setsockopt = ipv6_setsockopt, | |
994 | .getsockopt = ipv6_getsockopt, | |
995 | .get_dst = sctp_v6_get_dst, | |
996 | .get_saddr = sctp_v6_get_saddr, | |
997 | .copy_addrlist = sctp_v6_copy_addrlist, | |
998 | .from_skb = sctp_v6_from_skb, | |
999 | .from_sk = sctp_v6_from_sk, | |
1000 | .to_sk_saddr = sctp_v6_to_sk_saddr, | |
1001 | .to_sk_daddr = sctp_v6_to_sk_daddr, | |
1002 | .from_addr_param = sctp_v6_from_addr_param, | |
1003 | .to_addr_param = sctp_v6_to_addr_param, | |
1004 | .dst_saddr = sctp_v6_dst_saddr, | |
1005 | .cmp_addr = sctp_v6_cmp_addr, | |
1006 | .scope = sctp_v6_scope, | |
1007 | .addr_valid = sctp_v6_addr_valid, | |
1008 | .inaddr_any = sctp_v6_inaddr_any, | |
1009 | .is_any = sctp_v6_is_any, | |
1010 | .available = sctp_v6_available, | |
1011 | .skb_iif = sctp_v6_skb_iif, | |
1012 | .is_ce = sctp_v6_is_ce, | |
1013 | .seq_dump_addr = sctp_v6_seq_dump_addr, | |
b9031d9d | 1014 | .ecn_capable = sctp_v6_ecn_capable, |
543d9cfe ACM |
1015 | .net_header_len = sizeof(struct ipv6hdr), |
1016 | .sockaddr_len = sizeof(struct sockaddr_in6), | |
3fdadf7d | 1017 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
1018 | .compat_setsockopt = compat_ipv6_setsockopt, |
1019 | .compat_getsockopt = compat_ipv6_getsockopt, | |
3fdadf7d | 1020 | #endif |
1da177e4 LT |
1021 | }; |
1022 | ||
15efbe76 | 1023 | static struct sctp_pf sctp_pf_inet6 = { |
1da177e4 LT |
1024 | .event_msgname = sctp_inet6_event_msgname, |
1025 | .skb_msgname = sctp_inet6_skb_msgname, | |
1026 | .af_supported = sctp_inet6_af_supported, | |
1027 | .cmp_addr = sctp_inet6_cmp_addr, | |
1028 | .bind_verify = sctp_inet6_bind_verify, | |
1029 | .send_verify = sctp_inet6_send_verify, | |
1030 | .supported_addrs = sctp_inet6_supported_addrs, | |
1031 | .create_accept_sk = sctp_v6_create_accept_sk, | |
1032 | .addr_v4map = sctp_v6_addr_v4map, | |
15efbe76 | 1033 | .af = &sctp_af_inet6, |
1da177e4 LT |
1034 | }; |
1035 | ||
827bf122 | 1036 | /* Initialize IPv6 support and register with socket layer. */ |
270637ab | 1037 | void sctp_v6_pf_init(void) |
1da177e4 | 1038 | { |
827bf122 | 1039 | /* Register the SCTP specific PF_INET6 functions. */ |
15efbe76 | 1040 | sctp_register_pf(&sctp_pf_inet6, PF_INET6); |
827bf122 SS |
1041 | |
1042 | /* Register the SCTP specific AF_INET6 functions. */ | |
15efbe76 | 1043 | sctp_register_af(&sctp_af_inet6); |
270637ab VY |
1044 | } |
1045 | ||
1046 | void sctp_v6_pf_exit(void) | |
1047 | { | |
1048 | list_del(&sctp_af_inet6.list); | |
1049 | } | |
1050 | ||
1051 | /* Initialize IPv6 support and register with socket layer. */ | |
1052 | int sctp_v6_protosw_init(void) | |
1053 | { | |
1054 | int rc; | |
827bf122 SS |
1055 | |
1056 | rc = proto_register(&sctpv6_prot, 1); | |
1da177e4 | 1057 | if (rc) |
827bf122 | 1058 | return rc; |
1da177e4 LT |
1059 | |
1060 | /* Add SCTPv6(UDP and TCP style) to inetsw6 linked list. */ | |
1061 | inet6_register_protosw(&sctpv6_seqpacket_protosw); | |
1062 | inet6_register_protosw(&sctpv6_stream_protosw); | |
1063 | ||
827bf122 SS |
1064 | return 0; |
1065 | } | |
1da177e4 | 1066 | |
270637ab VY |
1067 | void sctp_v6_protosw_exit(void) |
1068 | { | |
1069 | inet6_unregister_protosw(&sctpv6_seqpacket_protosw); | |
1070 | inet6_unregister_protosw(&sctpv6_stream_protosw); | |
1071 | proto_unregister(&sctpv6_prot); | |
1072 | } | |
1073 | ||
1074 | ||
827bf122 SS |
1075 | /* Register with inet6 layer. */ |
1076 | int sctp_v6_add_protocol(void) | |
1077 | { | |
1da177e4 LT |
1078 | /* Register notifier for inet6 address additions/deletions. */ |
1079 | register_inet6addr_notifier(&sctp_inet6addr_notifier); | |
827bf122 SS |
1080 | |
1081 | if (inet6_add_protocol(&sctpv6_protocol, IPPROTO_SCTP) < 0) | |
1082 | return -EAGAIN; | |
1083 | ||
1084 | return 0; | |
1da177e4 LT |
1085 | } |
1086 | ||
827bf122 SS |
1087 | /* Unregister with inet6 layer. */ |
1088 | void sctp_v6_del_protocol(void) | |
1089 | { | |
1090 | inet6_del_protocol(&sctpv6_protocol, IPPROTO_SCTP); | |
1091 | unregister_inet6addr_notifier(&sctp_inet6addr_notifier); | |
1da177e4 | 1092 | } |