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): | |
91705c61 | 30 | * lksctp developers <linux-sctp@vger.kernel.org> |
1da177e4 | 31 | * |
1da177e4 LT |
32 | * Written or modified by: |
33 | * Le Yanqun <yanqun.le@nokia.com> | |
34 | * Hui Huang <hui.huang@nokia.com> | |
35 | * La Monte H.P. Yarroll <piggy@acm.org> | |
36 | * Sridhar Samudrala <sri@us.ibm.com> | |
37 | * Jon Grimm <jgrimm@us.ibm.com> | |
38 | * Ardelle Fan <ardelle.fan@intel.com> | |
39 | * | |
40 | * Based on: | |
41 | * linux/net/ipv6/tcp_ipv6.c | |
1da177e4 LT |
42 | */ |
43 | ||
145ce502 JP |
44 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
45 | ||
1da177e4 LT |
46 | #include <linux/module.h> |
47 | #include <linux/errno.h> | |
48 | #include <linux/types.h> | |
49 | #include <linux/socket.h> | |
50 | #include <linux/sockios.h> | |
51 | #include <linux/net.h> | |
1da177e4 LT |
52 | #include <linux/in.h> |
53 | #include <linux/in6.h> | |
54 | #include <linux/netdevice.h> | |
55 | #include <linux/init.h> | |
56 | #include <linux/ipsec.h> | |
5a0e3ad6 | 57 | #include <linux/slab.h> |
1da177e4 LT |
58 | |
59 | #include <linux/ipv6.h> | |
60 | #include <linux/icmpv6.h> | |
61 | #include <linux/random.h> | |
62 | #include <linux/seq_file.h> | |
63 | ||
64 | #include <net/protocol.h> | |
1da177e4 | 65 | #include <net/ndisc.h> |
c752f073 | 66 | #include <net/ip.h> |
1da177e4 LT |
67 | #include <net/ipv6.h> |
68 | #include <net/transp_v6.h> | |
69 | #include <net/addrconf.h> | |
70 | #include <net/ip6_route.h> | |
71 | #include <net/inet_common.h> | |
72 | #include <net/inet_ecn.h> | |
73 | #include <net/sctp/sctp.h> | |
74 | ||
75 | #include <asm/uaccess.h> | |
76 | ||
62503411 WS |
77 | static inline int sctp_v6_addr_match_len(union sctp_addr *s1, |
78 | union sctp_addr *s2); | |
9914ae3c VY |
79 | static void sctp_v6_to_addr(union sctp_addr *addr, struct in6_addr *saddr, |
80 | __be16 port); | |
81 | static int sctp_v6_cmp_addr(const union sctp_addr *addr1, | |
82 | const union sctp_addr *addr2); | |
62503411 | 83 | |
29303547 VY |
84 | /* Event handler for inet6 address addition/deletion events. |
85 | * The sctp_local_addr_list needs to be protocted by a spin lock since | |
86 | * multiple notifiers (say IPv4 and IPv6) may be running at the same | |
87 | * time and thus corrupt the list. | |
88 | * The reader side is protected with RCU. | |
89 | */ | |
24123186 AB |
90 | static int sctp_inet6addr_event(struct notifier_block *this, unsigned long ev, |
91 | void *ptr) | |
29c7cf96 SS |
92 | { |
93 | struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr; | |
29303547 VY |
94 | struct sctp_sockaddr_entry *addr = NULL; |
95 | struct sctp_sockaddr_entry *temp; | |
4db67e80 | 96 | struct net *net = dev_net(ifa->idev->dev); |
22626216 | 97 | int found = 0; |
29c7cf96 SS |
98 | |
99 | switch (ev) { | |
100 | case NETDEV_UP: | |
101 | addr = kmalloc(sizeof(struct sctp_sockaddr_entry), GFP_ATOMIC); | |
102 | if (addr) { | |
103 | addr->a.v6.sin6_family = AF_INET6; | |
104 | addr->a.v6.sin6_port = 0; | |
4e3fd7a0 | 105 | addr->a.v6.sin6_addr = ifa->addr; |
29c7cf96 | 106 | addr->a.v6.sin6_scope_id = ifa->idev->dev->ifindex; |
29303547 | 107 | addr->valid = 1; |
4db67e80 EB |
108 | spin_lock_bh(&net->sctp.local_addr_lock); |
109 | list_add_tail_rcu(&addr->list, &net->sctp.local_addr_list); | |
110 | sctp_addr_wq_mgmt(net, addr, SCTP_ADDR_NEW); | |
111 | spin_unlock_bh(&net->sctp.local_addr_lock); | |
29c7cf96 SS |
112 | } |
113 | break; | |
114 | case NETDEV_DOWN: | |
4db67e80 | 115 | spin_lock_bh(&net->sctp.local_addr_lock); |
29303547 | 116 | list_for_each_entry_safe(addr, temp, |
4db67e80 | 117 | &net->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)) { | |
4db67e80 | 121 | sctp_addr_wq_mgmt(net, addr, SCTP_ADDR_DEL); |
22626216 | 122 | found = 1; |
29303547 VY |
123 | addr->valid = 0; |
124 | list_del_rcu(&addr->list); | |
29c7cf96 SS |
125 | break; |
126 | } | |
127 | } | |
4db67e80 | 128 | spin_unlock_bh(&net->sctp.local_addr_lock); |
22626216 | 129 | if (found) |
1231f0ba | 130 | kfree_rcu(addr, rcu); |
29c7cf96 SS |
131 | break; |
132 | } | |
133 | ||
134 | return NOTIFY_DONE; | |
135 | } | |
136 | ||
1da177e4 | 137 | static struct notifier_block sctp_inet6addr_notifier = { |
29c7cf96 | 138 | .notifier_call = sctp_inet6addr_event, |
1da177e4 LT |
139 | }; |
140 | ||
141 | /* ICMP error handler. */ | |
dda91928 DB |
142 | static void sctp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt, |
143 | u8 type, u8 code, int offset, __be32 info) | |
1da177e4 LT |
144 | { |
145 | struct inet6_dev *idev; | |
1da177e4 | 146 | struct sock *sk; |
1da177e4 LT |
147 | struct sctp_association *asoc; |
148 | struct sctp_transport *transport; | |
149 | struct ipv6_pinfo *np; | |
2c928e0e | 150 | __u16 saveip, savesctp; |
1da177e4 | 151 | int err; |
4110cc25 | 152 | struct net *net = dev_net(skb->dev); |
1da177e4 LT |
153 | |
154 | idev = in6_dev_get(skb->dev); | |
155 | ||
156 | /* Fix up skb to look at the embedded net header. */ | |
b0e380b1 ACM |
157 | saveip = skb->network_header; |
158 | savesctp = skb->transport_header; | |
1ced98e8 | 159 | skb_reset_network_header(skb); |
a27ef749 | 160 | skb_set_transport_header(skb, offset); |
4110cc25 | 161 | sk = sctp_err_lookup(net, AF_INET6, skb, sctp_hdr(skb), &asoc, &transport); |
1da177e4 | 162 | /* Put back, the original pointers. */ |
b0e380b1 ACM |
163 | skb->network_header = saveip; |
164 | skb->transport_header = savesctp; | |
1da177e4 | 165 | if (!sk) { |
b01a2407 | 166 | ICMP6_INC_STATS_BH(net, idev, ICMP6_MIB_INERRORS); |
1da177e4 LT |
167 | goto out; |
168 | } | |
169 | ||
170 | /* Warning: The sock lock is held. Remember to call | |
171 | * sctp_err_finish! | |
172 | */ | |
173 | ||
174 | switch (type) { | |
175 | case ICMPV6_PKT_TOOBIG: | |
176 | sctp_icmp_frag_needed(sk, asoc, transport, ntohl(info)); | |
177 | goto out_unlock; | |
178 | case ICMPV6_PARAMPROB: | |
179 | if (ICMPV6_UNK_NEXTHDR == code) { | |
d1ad1ff2 | 180 | sctp_icmp_proto_unreachable(sk, asoc, transport); |
1da177e4 LT |
181 | goto out_unlock; |
182 | } | |
183 | break; | |
ec18d9a2 DM |
184 | case NDISC_REDIRECT: |
185 | sctp_icmp_redirect(sk, transport, skb); | |
3f96a532 | 186 | goto out_unlock; |
1da177e4 LT |
187 | default: |
188 | break; | |
189 | } | |
190 | ||
191 | np = inet6_sk(sk); | |
192 | icmpv6_err_convert(type, code, &err); | |
193 | if (!sock_owned_by_user(sk) && np->recverr) { | |
194 | sk->sk_err = err; | |
195 | sk->sk_error_report(sk); | |
196 | } else { /* Only an error on timeout */ | |
197 | sk->sk_err_soft = err; | |
198 | } | |
199 | ||
200 | out_unlock: | |
d1ad1ff2 | 201 | sctp_err_finish(sk, asoc); |
1da177e4 LT |
202 | out: |
203 | if (likely(idev != NULL)) | |
204 | in6_dev_put(idev); | |
205 | } | |
206 | ||
f880374c | 207 | static int sctp_v6_xmit(struct sk_buff *skb, struct sctp_transport *transport) |
1da177e4 LT |
208 | { |
209 | struct sock *sk = skb->sk; | |
210 | struct ipv6_pinfo *np = inet6_sk(sk); | |
95ee6208 | 211 | struct flowi6 *fl6 = &transport->fl.u.ip6; |
1da177e4 | 212 | |
bb33381d | 213 | pr_debug("%s: skb:%p, len:%d, src:%pI6 dst:%pI6\n", __func__, skb, |
95ee6208 | 214 | skb->len, &fl6->saddr, &fl6->daddr); |
1da177e4 | 215 | |
95ee6208 | 216 | IP6_ECN_flow_xmit(sk, fl6->flowlabel); |
1da177e4 | 217 | |
f880374c HX |
218 | if (!(transport->param_flags & SPP_PMTUD_ENABLE)) |
219 | skb->local_df = 1; | |
220 | ||
95ee6208 DB |
221 | SCTP_INC_STATS(sock_net(sk), SCTP_MIB_OUTSCTPPACKS); |
222 | ||
223 | return ip6_xmit(sk, skb, fl6, np->opt, np->tclass); | |
1da177e4 LT |
224 | } |
225 | ||
226 | /* Returns the dst cache entry for the given source and destination ip | |
227 | * addresses. | |
228 | */ | |
da0420be VY |
229 | static void sctp_v6_get_dst(struct sctp_transport *t, union sctp_addr *saddr, |
230 | struct flowi *fl, struct sock *sk) | |
1da177e4 | 231 | { |
da0420be | 232 | struct sctp_association *asoc = t->asoc; |
62503411 | 233 | struct dst_entry *dst = NULL; |
9914ae3c | 234 | struct flowi6 *fl6 = &fl->u.ip6; |
62503411 | 235 | struct sctp_bind_addr *bp; |
95ee6208 | 236 | struct ipv6_pinfo *np = inet6_sk(sk); |
62503411 WS |
237 | struct sctp_sockaddr_entry *laddr; |
238 | union sctp_addr *baddr = NULL; | |
da0420be | 239 | union sctp_addr *daddr = &t->ipaddr; |
9914ae3c | 240 | union sctp_addr dst_saddr; |
95ee6208 | 241 | struct in6_addr *final_p, final; |
62503411 WS |
242 | __u8 matchlen = 0; |
243 | __u8 bmatchlen; | |
244 | sctp_scope_t scope; | |
1da177e4 | 245 | |
9914ae3c | 246 | memset(fl6, 0, sizeof(struct flowi6)); |
4e3fd7a0 | 247 | fl6->daddr = daddr->v6.sin6_addr; |
9c6a02f4 VY |
248 | fl6->fl6_dport = daddr->v6.sin6_port; |
249 | fl6->flowi6_proto = IPPROTO_SCTP; | |
1da177e4 | 250 | if (ipv6_addr_type(&daddr->v6.sin6_addr) & IPV6_ADDR_LINKLOCAL) |
9914ae3c | 251 | fl6->flowi6_oif = daddr->v6.sin6_scope_id; |
d808ad9a | 252 | |
bb33381d | 253 | pr_debug("%s: dst=%pI6 ", __func__, &fl6->daddr); |
1da177e4 | 254 | |
9c6a02f4 VY |
255 | if (asoc) |
256 | fl6->fl6_sport = htons(asoc->base.bind_addr.port); | |
1da177e4 LT |
257 | |
258 | if (saddr) { | |
4e3fd7a0 | 259 | fl6->saddr = saddr->v6.sin6_addr; |
9c6a02f4 | 260 | fl6->fl6_sport = saddr->v6.sin6_port; |
bb33381d DB |
261 | |
262 | pr_debug("src=%pI6 - ", &fl6->saddr); | |
1da177e4 LT |
263 | } |
264 | ||
95ee6208 DB |
265 | final_p = fl6_update_dst(fl6, np->opt, &final); |
266 | dst = ip6_dst_lookup_flow(sk, fl6, final_p, false); | |
62503411 WS |
267 | if (!asoc || saddr) |
268 | goto out; | |
269 | ||
9914ae3c VY |
270 | bp = &asoc->base.bind_addr; |
271 | scope = sctp_scope(daddr); | |
272 | /* ip6_dst_lookup has filled in the fl6->saddr for us. Check | |
273 | * to see if we can use it. | |
274 | */ | |
9c6a02f4 | 275 | if (!IS_ERR(dst)) { |
9914ae3c VY |
276 | /* Walk through the bind address list and look for a bind |
277 | * address that matches the source address of the returned dst. | |
62503411 | 278 | */ |
9914ae3c | 279 | sctp_v6_to_addr(&dst_saddr, &fl6->saddr, htons(bp->port)); |
62503411 WS |
280 | rcu_read_lock(); |
281 | list_for_each_entry_rcu(laddr, &bp->address_list, list) { | |
9914ae3c | 282 | if (!laddr->valid || (laddr->state != SCTP_ADDR_SRC)) |
62503411 | 283 | continue; |
9914ae3c VY |
284 | |
285 | /* Do not compare against v4 addrs */ | |
286 | if ((laddr->a.sa.sa_family == AF_INET6) && | |
287 | (sctp_v6_cmp_addr(&dst_saddr, &laddr->a))) { | |
288 | rcu_read_unlock(); | |
289 | goto out; | |
62503411 WS |
290 | } |
291 | } | |
292 | rcu_read_unlock(); | |
9914ae3c VY |
293 | /* None of the bound addresses match the source address of the |
294 | * dst. So release it. | |
295 | */ | |
296 | dst_release(dst); | |
297 | dst = NULL; | |
1da177e4 LT |
298 | } |
299 | ||
9914ae3c VY |
300 | /* Walk through the bind address list and try to get the |
301 | * best source address for a given destination. | |
302 | */ | |
303 | rcu_read_lock(); | |
304 | list_for_each_entry_rcu(laddr, &bp->address_list, list) { | |
e9c0dfba | 305 | if (!laddr->valid) |
9914ae3c | 306 | continue; |
e9c0dfba DB |
307 | if ((laddr->state == SCTP_ADDR_SRC) && |
308 | (laddr->a.sa.sa_family == AF_INET6) && | |
9914ae3c VY |
309 | (scope <= sctp_scope(&laddr->a))) { |
310 | bmatchlen = sctp_v6_addr_match_len(daddr, &laddr->a); | |
311 | if (!baddr || (matchlen < bmatchlen)) { | |
312 | baddr = &laddr->a; | |
313 | matchlen = bmatchlen; | |
314 | } | |
62503411 WS |
315 | } |
316 | } | |
9914ae3c | 317 | rcu_read_unlock(); |
95ee6208 | 318 | |
9914ae3c | 319 | if (baddr) { |
4e3fd7a0 | 320 | fl6->saddr = baddr->v6.sin6_addr; |
9c6a02f4 | 321 | fl6->fl6_sport = baddr->v6.sin6_port; |
95ee6208 DB |
322 | final_p = fl6_update_dst(fl6, np->opt, &final); |
323 | dst = ip6_dst_lookup_flow(sk, fl6, final_p, false); | |
9914ae3c VY |
324 | } |
325 | ||
62503411 | 326 | out: |
ee3f34e8 | 327 | if (!IS_ERR_OR_NULL(dst)) { |
1da177e4 | 328 | struct rt6_info *rt; |
bb33381d | 329 | |
1da177e4 | 330 | rt = (struct rt6_info *)dst; |
da0420be | 331 | t->dst = dst; |
d27fc782 | 332 | t->dst_cookie = rt->rt6i_node ? rt->rt6i_node->fn_sernum : 0; |
bb33381d DB |
333 | pr_debug("rt6_dst:%pI6 rt6_src:%pI6\n", &rt->rt6i_dst.addr, |
334 | &fl6->saddr); | |
da0420be VY |
335 | } else { |
336 | t->dst = NULL; | |
bb33381d DB |
337 | |
338 | pr_debug("no route\n"); | |
1da177e4 | 339 | } |
1da177e4 LT |
340 | } |
341 | ||
342 | /* Returns the number of consecutive initial bits that match in the 2 ipv6 | |
343 | * addresses. | |
344 | */ | |
345 | static inline int sctp_v6_addr_match_len(union sctp_addr *s1, | |
346 | union sctp_addr *s2) | |
347 | { | |
de7737e0 | 348 | return ipv6_addr_diff(&s1->v6.sin6_addr, &s2->v6.sin6_addr); |
1da177e4 LT |
349 | } |
350 | ||
351 | /* Fills in the source address(saddr) based on the destination address(daddr) | |
352 | * and asoc's bind address list. | |
353 | */ | |
e5117101 | 354 | static void sctp_v6_get_saddr(struct sctp_sock *sk, |
9914ae3c | 355 | struct sctp_transport *t, |
9914ae3c | 356 | struct flowi *fl) |
1da177e4 | 357 | { |
9914ae3c VY |
358 | struct flowi6 *fl6 = &fl->u.ip6; |
359 | union sctp_addr *saddr = &t->saddr; | |
1da177e4 | 360 | |
bb33381d | 361 | pr_debug("%s: asoc:%p dst:%p\n", __func__, t->asoc, t->dst); |
1da177e4 | 362 | |
9914ae3c VY |
363 | if (t->dst) { |
364 | saddr->v6.sin6_family = AF_INET6; | |
4e3fd7a0 | 365 | saddr->v6.sin6_addr = fl6->saddr; |
1da177e4 | 366 | } |
1da177e4 LT |
367 | } |
368 | ||
369 | /* Make a copy of all potential local addresses. */ | |
370 | static void sctp_v6_copy_addrlist(struct list_head *addrlist, | |
371 | struct net_device *dev) | |
372 | { | |
373 | struct inet6_dev *in6_dev; | |
374 | struct inet6_ifaddr *ifp; | |
375 | struct sctp_sockaddr_entry *addr; | |
376 | ||
8814c4b5 | 377 | rcu_read_lock(); |
1da177e4 | 378 | if ((in6_dev = __in6_dev_get(dev)) == NULL) { |
8814c4b5 | 379 | rcu_read_unlock(); |
1da177e4 LT |
380 | return; |
381 | } | |
382 | ||
e2eb8d45 | 383 | read_lock_bh(&in6_dev->lock); |
502a2ffd | 384 | list_for_each_entry(ifp, &in6_dev->addr_list, if_list) { |
1da177e4 | 385 | /* Add the address to the local list. */ |
939cfa75 | 386 | addr = kzalloc(sizeof(*addr), GFP_ATOMIC); |
1da177e4 | 387 | if (addr) { |
2a6fd78a AV |
388 | addr->a.v6.sin6_family = AF_INET6; |
389 | addr->a.v6.sin6_port = 0; | |
4e3fd7a0 | 390 | addr->a.v6.sin6_addr = ifp->addr; |
2a6fd78a | 391 | addr->a.v6.sin6_scope_id = dev->ifindex; |
29303547 | 392 | addr->valid = 1; |
1da177e4 LT |
393 | INIT_LIST_HEAD(&addr->list); |
394 | list_add_tail(&addr->list, addrlist); | |
395 | } | |
396 | } | |
397 | ||
e2eb8d45 | 398 | read_unlock_bh(&in6_dev->lock); |
8814c4b5 | 399 | rcu_read_unlock(); |
1da177e4 LT |
400 | } |
401 | ||
402 | /* Initialize a sockaddr_storage from in incoming skb. */ | |
403 | static void sctp_v6_from_skb(union sctp_addr *addr,struct sk_buff *skb, | |
404 | int is_saddr) | |
405 | { | |
d55c41b1 | 406 | __be16 *port; |
1da177e4 LT |
407 | struct sctphdr *sh; |
408 | ||
409 | port = &addr->v6.sin6_port; | |
410 | addr->v6.sin6_family = AF_INET6; | |
411 | addr->v6.sin6_flowinfo = 0; /* FIXME */ | |
412 | addr->v6.sin6_scope_id = ((struct inet6_skb_parm *)skb->cb)->iif; | |
413 | ||
2c0fd387 | 414 | sh = sctp_hdr(skb); |
1da177e4 | 415 | if (is_saddr) { |
d55c41b1 | 416 | *port = sh->source; |
4e3fd7a0 | 417 | addr->v6.sin6_addr = ipv6_hdr(skb)->saddr; |
1da177e4 | 418 | } else { |
d55c41b1 | 419 | *port = sh->dest; |
4e3fd7a0 | 420 | addr->v6.sin6_addr = ipv6_hdr(skb)->daddr; |
1da177e4 | 421 | } |
1da177e4 LT |
422 | } |
423 | ||
424 | /* Initialize an sctp_addr from a socket. */ | |
425 | static void sctp_v6_from_sk(union sctp_addr *addr, struct sock *sk) | |
426 | { | |
427 | addr->v6.sin6_family = AF_INET6; | |
7dcdbd95 | 428 | addr->v6.sin6_port = 0; |
4e3fd7a0 | 429 | addr->v6.sin6_addr = inet6_sk(sk)->rcv_saddr; |
1da177e4 LT |
430 | } |
431 | ||
432 | /* Initialize sk->sk_rcv_saddr from sctp_addr. */ | |
433 | static void sctp_v6_to_sk_saddr(union sctp_addr *addr, struct sock *sk) | |
434 | { | |
435 | if (addr->sa.sa_family == AF_INET && sctp_sk(sk)->v4mapped) { | |
436 | inet6_sk(sk)->rcv_saddr.s6_addr32[0] = 0; | |
437 | inet6_sk(sk)->rcv_saddr.s6_addr32[1] = 0; | |
438 | inet6_sk(sk)->rcv_saddr.s6_addr32[2] = htonl(0x0000ffff); | |
439 | inet6_sk(sk)->rcv_saddr.s6_addr32[3] = | |
440 | addr->v4.sin_addr.s_addr; | |
441 | } else { | |
4e3fd7a0 | 442 | inet6_sk(sk)->rcv_saddr = addr->v6.sin6_addr; |
1da177e4 LT |
443 | } |
444 | } | |
445 | ||
446 | /* Initialize sk->sk_daddr from sctp_addr. */ | |
447 | static void sctp_v6_to_sk_daddr(union sctp_addr *addr, struct sock *sk) | |
448 | { | |
449 | if (addr->sa.sa_family == AF_INET && sctp_sk(sk)->v4mapped) { | |
450 | inet6_sk(sk)->daddr.s6_addr32[0] = 0; | |
451 | inet6_sk(sk)->daddr.s6_addr32[1] = 0; | |
452 | inet6_sk(sk)->daddr.s6_addr32[2] = htonl(0x0000ffff); | |
453 | inet6_sk(sk)->daddr.s6_addr32[3] = addr->v4.sin_addr.s_addr; | |
454 | } else { | |
4e3fd7a0 | 455 | inet6_sk(sk)->daddr = addr->v6.sin6_addr; |
1da177e4 LT |
456 | } |
457 | } | |
458 | ||
459 | /* Initialize a sctp_addr from an address parameter. */ | |
460 | static void sctp_v6_from_addr_param(union sctp_addr *addr, | |
461 | union sctp_addr_param *param, | |
dd86d136 | 462 | __be16 port, int iif) |
1da177e4 LT |
463 | { |
464 | addr->v6.sin6_family = AF_INET6; | |
465 | addr->v6.sin6_port = port; | |
466 | addr->v6.sin6_flowinfo = 0; /* BUG */ | |
4e3fd7a0 | 467 | addr->v6.sin6_addr = param->v6.addr; |
1da177e4 LT |
468 | addr->v6.sin6_scope_id = iif; |
469 | } | |
470 | ||
471 | /* Initialize an address parameter from a sctp_addr and return the length | |
472 | * of the address parameter. | |
473 | */ | |
474 | static int sctp_v6_to_addr_param(const union sctp_addr *addr, | |
475 | union sctp_addr_param *param) | |
476 | { | |
477 | int length = sizeof(sctp_ipv6addr_param_t); | |
478 | ||
479 | param->v6.param_hdr.type = SCTP_PARAM_IPV6_ADDRESS; | |
dbc16db1 | 480 | param->v6.param_hdr.length = htons(length); |
4e3fd7a0 | 481 | param->v6.addr = addr->v6.sin6_addr; |
1da177e4 LT |
482 | |
483 | return length; | |
484 | } | |
485 | ||
9914ae3c VY |
486 | /* Initialize a sctp_addr from struct in6_addr. */ |
487 | static void sctp_v6_to_addr(union sctp_addr *addr, struct in6_addr *saddr, | |
854d43a4 | 488 | __be16 port) |
1da177e4 | 489 | { |
1da177e4 LT |
490 | addr->sa.sa_family = AF_INET6; |
491 | addr->v6.sin6_port = port; | |
4e3fd7a0 | 492 | addr->v6.sin6_addr = *saddr; |
1da177e4 LT |
493 | } |
494 | ||
495 | /* Compare addresses exactly. | |
496 | * v4-mapped-v6 is also in consideration. | |
497 | */ | |
498 | static int sctp_v6_cmp_addr(const union sctp_addr *addr1, | |
499 | const union sctp_addr *addr2) | |
500 | { | |
501 | if (addr1->sa.sa_family != addr2->sa.sa_family) { | |
502 | if (addr1->sa.sa_family == AF_INET && | |
503 | addr2->sa.sa_family == AF_INET6 && | |
e773e4fa | 504 | ipv6_addr_v4mapped(&addr2->v6.sin6_addr)) { |
1da177e4 LT |
505 | if (addr2->v6.sin6_port == addr1->v4.sin_port && |
506 | addr2->v6.sin6_addr.s6_addr32[3] == | |
507 | addr1->v4.sin_addr.s_addr) | |
508 | return 1; | |
509 | } | |
510 | if (addr2->sa.sa_family == AF_INET && | |
511 | addr1->sa.sa_family == AF_INET6 && | |
e773e4fa | 512 | ipv6_addr_v4mapped(&addr1->v6.sin6_addr)) { |
1da177e4 LT |
513 | if (addr1->v6.sin6_port == addr2->v4.sin_port && |
514 | addr1->v6.sin6_addr.s6_addr32[3] == | |
515 | addr2->v4.sin_addr.s_addr) | |
516 | return 1; | |
517 | } | |
518 | return 0; | |
519 | } | |
520 | if (!ipv6_addr_equal(&addr1->v6.sin6_addr, &addr2->v6.sin6_addr)) | |
521 | return 0; | |
522 | /* If this is a linklocal address, compare the scope_id. */ | |
523 | if (ipv6_addr_type(&addr1->v6.sin6_addr) & IPV6_ADDR_LINKLOCAL) { | |
524 | if (addr1->v6.sin6_scope_id && addr2->v6.sin6_scope_id && | |
525 | (addr1->v6.sin6_scope_id != addr2->v6.sin6_scope_id)) { | |
526 | return 0; | |
527 | } | |
528 | } | |
529 | ||
530 | return 1; | |
531 | } | |
532 | ||
533 | /* Initialize addr struct to INADDR_ANY. */ | |
6fbfa9f9 | 534 | static void sctp_v6_inaddr_any(union sctp_addr *addr, __be16 port) |
1da177e4 LT |
535 | { |
536 | memset(addr, 0x00, sizeof(union sctp_addr)); | |
537 | addr->v6.sin6_family = AF_INET6; | |
538 | addr->v6.sin6_port = port; | |
539 | } | |
540 | ||
541 | /* Is this a wildcard address? */ | |
542 | static int sctp_v6_is_any(const union sctp_addr *addr) | |
543 | { | |
b9b9e10f | 544 | return ipv6_addr_any(&addr->v6.sin6_addr); |
1da177e4 LT |
545 | } |
546 | ||
547 | /* Should this be available for binding? */ | |
548 | static int sctp_v6_available(union sctp_addr *addr, struct sctp_sock *sp) | |
549 | { | |
550 | int type; | |
b71d1d42 | 551 | const struct in6_addr *in6 = (const struct in6_addr *)&addr->v6.sin6_addr; |
1da177e4 LT |
552 | |
553 | type = ipv6_addr_type(in6); | |
554 | if (IPV6_ADDR_ANY == type) | |
555 | return 1; | |
556 | if (type == IPV6_ADDR_MAPPED) { | |
557 | if (sp && !sp->v4mapped) | |
558 | return 0; | |
559 | if (sp && ipv6_only_sock(sctp_opt2sk(sp))) | |
560 | return 0; | |
561 | sctp_v6_map_v4(addr); | |
562 | return sctp_get_af_specific(AF_INET)->available(addr, sp); | |
563 | } | |
564 | if (!(type & IPV6_ADDR_UNICAST)) | |
565 | return 0; | |
566 | ||
bb2db45b | 567 | return ipv6_chk_addr(sock_net(&sp->inet.sk), in6, NULL, 0); |
1da177e4 LT |
568 | } |
569 | ||
570 | /* This function checks if the address is a valid address to be used for | |
571 | * SCTP. | |
572 | * | |
573 | * Output: | |
574 | * Return 0 - If the address is a non-unicast or an illegal address. | |
575 | * Return 1 - If the address is a unicast. | |
576 | */ | |
5636bef7 VY |
577 | static int sctp_v6_addr_valid(union sctp_addr *addr, |
578 | struct sctp_sock *sp, | |
579 | const struct sk_buff *skb) | |
1da177e4 LT |
580 | { |
581 | int ret = ipv6_addr_type(&addr->v6.sin6_addr); | |
582 | ||
583 | /* Support v4-mapped-v6 address. */ | |
584 | if (ret == IPV6_ADDR_MAPPED) { | |
585 | /* Note: This routine is used in input, so v4-mapped-v6 | |
586 | * are disallowed here when there is no sctp_sock. | |
587 | */ | |
588 | if (!sp || !sp->v4mapped) | |
589 | return 0; | |
590 | if (sp && ipv6_only_sock(sctp_opt2sk(sp))) | |
591 | return 0; | |
592 | sctp_v6_map_v4(addr); | |
5636bef7 | 593 | return sctp_get_af_specific(AF_INET)->addr_valid(addr, sp, skb); |
1da177e4 LT |
594 | } |
595 | ||
596 | /* Is this a non-unicast address */ | |
597 | if (!(ret & IPV6_ADDR_UNICAST)) | |
598 | return 0; | |
599 | ||
600 | return 1; | |
601 | } | |
602 | ||
603 | /* What is the scope of 'addr'? */ | |
604 | static sctp_scope_t sctp_v6_scope(union sctp_addr *addr) | |
605 | { | |
606 | int v6scope; | |
607 | sctp_scope_t retval; | |
608 | ||
609 | /* The IPv6 scope is really a set of bit fields. | |
610 | * See IFA_* in <net/if_inet6.h>. Map to a generic SCTP scope. | |
611 | */ | |
612 | ||
613 | v6scope = ipv6_addr_scope(&addr->v6.sin6_addr); | |
614 | switch (v6scope) { | |
615 | case IFA_HOST: | |
616 | retval = SCTP_SCOPE_LOOPBACK; | |
617 | break; | |
618 | case IFA_LINK: | |
619 | retval = SCTP_SCOPE_LINK; | |
620 | break; | |
621 | case IFA_SITE: | |
622 | retval = SCTP_SCOPE_PRIVATE; | |
623 | break; | |
624 | default: | |
625 | retval = SCTP_SCOPE_GLOBAL; | |
626 | break; | |
3ff50b79 | 627 | } |
1da177e4 LT |
628 | |
629 | return retval; | |
630 | } | |
631 | ||
632 | /* Create and initialize a new sk for the socket to be returned by accept(). */ | |
633 | static struct sock *sctp_v6_create_accept_sk(struct sock *sk, | |
634 | struct sctp_association *asoc) | |
635 | { | |
1da177e4 | 636 | struct sock *newsk; |
1da177e4 LT |
637 | struct ipv6_pinfo *newnp, *np = inet6_sk(sk); |
638 | struct sctp6_sock *newsctp6sk; | |
639 | ||
3b1e0a65 | 640 | newsk = sk_alloc(sock_net(sk), PF_INET6, GFP_KERNEL, sk->sk_prot); |
1da177e4 LT |
641 | if (!newsk) |
642 | goto out; | |
643 | ||
644 | sock_init_data(NULL, newsk); | |
645 | ||
914e1c8b | 646 | sctp_copy_sock(newsk, sk, asoc); |
1da177e4 LT |
647 | sock_reset_flag(sk, SOCK_ZAPPED); |
648 | ||
649 | newsctp6sk = (struct sctp6_sock *)newsk; | |
650 | inet_sk(newsk)->pinet6 = &newsctp6sk->inet6; | |
651 | ||
b225b884 DJ |
652 | sctp_sk(newsk)->v4mapped = sctp_sk(sk)->v4mapped; |
653 | ||
1da177e4 LT |
654 | newnp = inet6_sk(newsk); |
655 | ||
656 | memcpy(newnp, np, sizeof(struct ipv6_pinfo)); | |
657 | ||
658 | /* Initialize sk's sport, dport, rcv_saddr and daddr for getsockname() | |
659 | * and getpeername(). | |
660 | */ | |
1da177e4 LT |
661 | sctp_v6_to_sk_daddr(&asoc->peer.primary_addr, newsk); |
662 | ||
e6848976 | 663 | sk_refcnt_debug_inc(newsk); |
1da177e4 LT |
664 | |
665 | if (newsk->sk_prot->init(newsk)) { | |
666 | sk_common_release(newsk); | |
667 | newsk = NULL; | |
668 | } | |
669 | ||
670 | out: | |
671 | return newsk; | |
672 | } | |
673 | ||
674 | /* Map v4 address to mapped v6 address */ | |
675 | static void sctp_v6_addr_v4map(struct sctp_sock *sp, union sctp_addr *addr) | |
676 | { | |
677 | if (sp->v4mapped && AF_INET == addr->sa.sa_family) | |
678 | sctp_v4_map_v6(addr); | |
679 | } | |
680 | ||
681 | /* Where did this skb come from? */ | |
682 | static int sctp_v6_skb_iif(const struct sk_buff *skb) | |
683 | { | |
684 | struct inet6_skb_parm *opt = (struct inet6_skb_parm *) skb->cb; | |
685 | return opt->iif; | |
686 | } | |
687 | ||
688 | /* Was this packet marked by Explicit Congestion Notification? */ | |
689 | static int sctp_v6_is_ce(const struct sk_buff *skb) | |
690 | { | |
0660e03f | 691 | return *((__u32 *)(ipv6_hdr(skb))) & htonl(1 << 20); |
1da177e4 LT |
692 | } |
693 | ||
694 | /* Dump the v6 addr to the seq file. */ | |
695 | static void sctp_v6_seq_dump_addr(struct seq_file *seq, union sctp_addr *addr) | |
696 | { | |
5b095d98 | 697 | seq_printf(seq, "%pI6 ", &addr->v6.sin6_addr); |
1da177e4 LT |
698 | } |
699 | ||
b9031d9d VY |
700 | static void sctp_v6_ecn_capable(struct sock *sk) |
701 | { | |
702 | inet6_sk(sk)->tclass |= INET_ECN_ECT_0; | |
703 | } | |
704 | ||
1da177e4 LT |
705 | /* Initialize a PF_INET6 socket msg_name. */ |
706 | static void sctp_inet6_msgname(char *msgname, int *addr_len) | |
707 | { | |
708 | struct sockaddr_in6 *sin6; | |
709 | ||
710 | sin6 = (struct sockaddr_in6 *)msgname; | |
711 | sin6->sin6_family = AF_INET6; | |
712 | sin6->sin6_flowinfo = 0; | |
713 | sin6->sin6_scope_id = 0; /*FIXME */ | |
714 | *addr_len = sizeof(struct sockaddr_in6); | |
715 | } | |
716 | ||
717 | /* Initialize a PF_INET msgname from a ulpevent. */ | |
718 | static void sctp_inet6_event_msgname(struct sctp_ulpevent *event, | |
719 | char *msgname, int *addrlen) | |
720 | { | |
721 | struct sockaddr_in6 *sin6, *sin6from; | |
722 | ||
723 | if (msgname) { | |
724 | union sctp_addr *addr; | |
725 | struct sctp_association *asoc; | |
726 | ||
727 | asoc = event->asoc; | |
728 | sctp_inet6_msgname(msgname, addrlen); | |
729 | sin6 = (struct sockaddr_in6 *)msgname; | |
730 | sin6->sin6_port = htons(asoc->peer.port); | |
731 | addr = &asoc->peer.primary_addr; | |
732 | ||
733 | /* Note: If we go to a common v6 format, this code | |
734 | * will change. | |
735 | */ | |
736 | ||
737 | /* Map ipv4 address into v4-mapped-on-v6 address. */ | |
738 | if (sctp_sk(asoc->base.sk)->v4mapped && | |
739 | AF_INET == addr->sa.sa_family) { | |
740 | sctp_v4_map_v6((union sctp_addr *)sin6); | |
741 | sin6->sin6_addr.s6_addr32[3] = | |
742 | addr->v4.sin_addr.s_addr; | |
743 | return; | |
744 | } | |
745 | ||
746 | sin6from = &asoc->peer.primary_addr.v6; | |
4e3fd7a0 | 747 | sin6->sin6_addr = sin6from->sin6_addr; |
1da177e4 LT |
748 | if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) |
749 | sin6->sin6_scope_id = sin6from->sin6_scope_id; | |
750 | } | |
751 | } | |
752 | ||
753 | /* Initialize a msg_name from an inbound skb. */ | |
754 | static void sctp_inet6_skb_msgname(struct sk_buff *skb, char *msgname, | |
755 | int *addr_len) | |
756 | { | |
757 | struct sctphdr *sh; | |
758 | struct sockaddr_in6 *sin6; | |
759 | ||
760 | if (msgname) { | |
761 | sctp_inet6_msgname(msgname, addr_len); | |
762 | sin6 = (struct sockaddr_in6 *)msgname; | |
2c0fd387 | 763 | sh = sctp_hdr(skb); |
1da177e4 LT |
764 | sin6->sin6_port = sh->source; |
765 | ||
766 | /* Map ipv4 address into v4-mapped-on-v6 address. */ | |
767 | if (sctp_sk(skb->sk)->v4mapped && | |
eddc9ec5 | 768 | ip_hdr(skb)->version == 4) { |
1da177e4 | 769 | sctp_v4_map_v6((union sctp_addr *)sin6); |
eddc9ec5 | 770 | sin6->sin6_addr.s6_addr32[3] = ip_hdr(skb)->saddr; |
1da177e4 LT |
771 | return; |
772 | } | |
773 | ||
774 | /* Otherwise, just copy the v6 address. */ | |
4e3fd7a0 | 775 | sin6->sin6_addr = ipv6_hdr(skb)->saddr; |
1da177e4 LT |
776 | if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) { |
777 | struct sctp_ulpevent *ev = sctp_skb2event(skb); | |
778 | sin6->sin6_scope_id = ev->iif; | |
779 | } | |
780 | } | |
781 | } | |
782 | ||
783 | /* Do we support this AF? */ | |
784 | static int sctp_inet6_af_supported(sa_family_t family, struct sctp_sock *sp) | |
785 | { | |
786 | switch (family) { | |
787 | case AF_INET6: | |
788 | return 1; | |
789 | /* v4-mapped-v6 addresses */ | |
790 | case AF_INET: | |
7dab83de | 791 | if (!__ipv6_only_sock(sctp_opt2sk(sp))) |
1da177e4 LT |
792 | return 1; |
793 | default: | |
794 | return 0; | |
795 | } | |
796 | } | |
797 | ||
798 | /* Address matching with wildcards allowed. This extra level | |
799 | * of indirection lets us choose whether a PF_INET6 should | |
800 | * disallow any v4 addresses if we so choose. | |
801 | */ | |
802 | static int sctp_inet6_cmp_addr(const union sctp_addr *addr1, | |
803 | const union sctp_addr *addr2, | |
804 | struct sctp_sock *opt) | |
805 | { | |
806 | struct sctp_af *af1, *af2; | |
52cae8f0 | 807 | struct sock *sk = sctp_opt2sk(opt); |
1da177e4 LT |
808 | |
809 | af1 = sctp_get_af_specific(addr1->sa.sa_family); | |
810 | af2 = sctp_get_af_specific(addr2->sa.sa_family); | |
811 | ||
812 | if (!af1 || !af2) | |
813 | return 0; | |
7dab83de VY |
814 | |
815 | /* If the socket is IPv6 only, v4 addrs will not match */ | |
52cae8f0 | 816 | if (__ipv6_only_sock(sk) && af1 != af2) |
7dab83de VY |
817 | return 0; |
818 | ||
1da177e4 | 819 | /* Today, wildcard AF_INET/AF_INET6. */ |
52cae8f0 | 820 | if (sctp_is_any(sk, addr1) || sctp_is_any(sk, addr2)) |
1da177e4 LT |
821 | return 1; |
822 | ||
823 | if (addr1->sa.sa_family != addr2->sa.sa_family) | |
824 | return 0; | |
825 | ||
826 | return af1->cmp_addr(addr1, addr2); | |
827 | } | |
828 | ||
829 | /* Verify that the provided sockaddr looks bindable. Common verification, | |
830 | * has already been taken care of. | |
831 | */ | |
832 | static int sctp_inet6_bind_verify(struct sctp_sock *opt, union sctp_addr *addr) | |
833 | { | |
834 | struct sctp_af *af; | |
835 | ||
836 | /* ASSERT: address family has already been verified. */ | |
837 | if (addr->sa.sa_family != AF_INET6) | |
838 | af = sctp_get_af_specific(addr->sa.sa_family); | |
839 | else { | |
1da177e4 | 840 | int type = ipv6_addr_type(&addr->v6.sin6_addr); |
6a6ddb2a SS |
841 | struct net_device *dev; |
842 | ||
1da177e4 | 843 | if (type & IPV6_ADDR_LINKLOCAL) { |
bb2db45b | 844 | struct net *net; |
6a6ddb2a SS |
845 | if (!addr->v6.sin6_scope_id) |
846 | return 0; | |
bb2db45b | 847 | net = sock_net(&opt->inet.sk); |
40c9c31e | 848 | rcu_read_lock(); |
bb2db45b | 849 | dev = dev_get_by_index_rcu(net, addr->v6.sin6_scope_id); |
40c9c31e | 850 | if (!dev || |
bb2db45b | 851 | !ipv6_chk_addr(net, &addr->v6.sin6_addr, dev, 0)) { |
40c9c31e | 852 | rcu_read_unlock(); |
1669d857 VY |
853 | return 0; |
854 | } | |
40c9c31e | 855 | rcu_read_unlock(); |
7dab83de VY |
856 | } else if (type == IPV6_ADDR_MAPPED) { |
857 | if (!opt->v4mapped) | |
858 | return 0; | |
1da177e4 | 859 | } |
7dab83de | 860 | |
1da177e4 LT |
861 | af = opt->pf->af; |
862 | } | |
863 | return af->available(addr, opt); | |
864 | } | |
865 | ||
6a6ddb2a | 866 | /* Verify that the provided sockaddr looks sendable. Common verification, |
1da177e4 LT |
867 | * has already been taken care of. |
868 | */ | |
869 | static int sctp_inet6_send_verify(struct sctp_sock *opt, union sctp_addr *addr) | |
870 | { | |
871 | struct sctp_af *af = NULL; | |
872 | ||
873 | /* ASSERT: address family has already been verified. */ | |
874 | if (addr->sa.sa_family != AF_INET6) | |
875 | af = sctp_get_af_specific(addr->sa.sa_family); | |
876 | else { | |
1da177e4 | 877 | int type = ipv6_addr_type(&addr->v6.sin6_addr); |
6a6ddb2a SS |
878 | struct net_device *dev; |
879 | ||
1da177e4 | 880 | if (type & IPV6_ADDR_LINKLOCAL) { |
6a6ddb2a SS |
881 | if (!addr->v6.sin6_scope_id) |
882 | return 0; | |
40c9c31e | 883 | rcu_read_lock(); |
bb2db45b | 884 | dev = dev_get_by_index_rcu(sock_net(&opt->inet.sk), |
40c9c31e ED |
885 | addr->v6.sin6_scope_id); |
886 | rcu_read_unlock(); | |
6a6ddb2a | 887 | if (!dev) |
1da177e4 LT |
888 | return 0; |
889 | } | |
890 | af = opt->pf->af; | |
891 | } | |
892 | ||
893 | return af != NULL; | |
894 | } | |
895 | ||
896 | /* Fill in Supported Address Type information for INIT and INIT-ACK | |
897 | * chunks. Note: In the future, we may want to look at sock options | |
898 | * to determine whether a PF_INET6 socket really wants to have IPV4 | |
899 | * addresses. | |
900 | * Returns number of addresses supported. | |
901 | */ | |
902 | static int sctp_inet6_supported_addrs(const struct sctp_sock *opt, | |
3dbe8656 | 903 | __be16 *types) |
1da177e4 | 904 | { |
7dab83de VY |
905 | types[0] = SCTP_PARAM_IPV6_ADDRESS; |
906 | if (!opt || !ipv6_only_sock(sctp_opt2sk(opt))) { | |
907 | types[1] = SCTP_PARAM_IPV4_ADDRESS; | |
908 | return 2; | |
909 | } | |
910 | return 1; | |
1da177e4 LT |
911 | } |
912 | ||
90ddc4f0 | 913 | static const struct proto_ops inet6_seqpacket_ops = { |
543d9cfe ACM |
914 | .family = PF_INET6, |
915 | .owner = THIS_MODULE, | |
916 | .release = inet6_release, | |
917 | .bind = inet6_bind, | |
918 | .connect = inet_dgram_connect, | |
919 | .socketpair = sock_no_socketpair, | |
920 | .accept = inet_accept, | |
921 | .getname = inet6_getname, | |
922 | .poll = sctp_poll, | |
923 | .ioctl = inet6_ioctl, | |
924 | .listen = sctp_inet_listen, | |
925 | .shutdown = inet_shutdown, | |
926 | .setsockopt = sock_common_setsockopt, | |
927 | .getsockopt = sock_common_getsockopt, | |
928 | .sendmsg = inet_sendmsg, | |
929 | .recvmsg = sock_common_recvmsg, | |
930 | .mmap = sock_no_mmap, | |
3fdadf7d | 931 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
932 | .compat_setsockopt = compat_sock_common_setsockopt, |
933 | .compat_getsockopt = compat_sock_common_getsockopt, | |
3fdadf7d | 934 | #endif |
1da177e4 LT |
935 | }; |
936 | ||
937 | static struct inet_protosw sctpv6_seqpacket_protosw = { | |
938 | .type = SOCK_SEQPACKET, | |
939 | .protocol = IPPROTO_SCTP, | |
940 | .prot = &sctpv6_prot, | |
941 | .ops = &inet6_seqpacket_ops, | |
1da177e4 LT |
942 | .no_check = 0, |
943 | .flags = SCTP_PROTOSW_FLAG | |
944 | }; | |
945 | static struct inet_protosw sctpv6_stream_protosw = { | |
946 | .type = SOCK_STREAM, | |
947 | .protocol = IPPROTO_SCTP, | |
948 | .prot = &sctpv6_prot, | |
949 | .ops = &inet6_seqpacket_ops, | |
1da177e4 LT |
950 | .no_check = 0, |
951 | .flags = SCTP_PROTOSW_FLAG, | |
952 | }; | |
953 | ||
e5bbef20 | 954 | static int sctp6_rcv(struct sk_buff *skb) |
1da177e4 | 955 | { |
e5bbef20 | 956 | return sctp_rcv(skb) ? -1 : 0; |
1da177e4 LT |
957 | } |
958 | ||
41135cc8 | 959 | static const struct inet6_protocol sctpv6_protocol = { |
1da177e4 LT |
960 | .handler = sctp6_rcv, |
961 | .err_handler = sctp_v6_err, | |
962 | .flags = INET6_PROTO_NOPOLICY | INET6_PROTO_FINAL, | |
963 | }; | |
964 | ||
15efbe76 | 965 | static struct sctp_af sctp_af_inet6 = { |
543d9cfe ACM |
966 | .sa_family = AF_INET6, |
967 | .sctp_xmit = sctp_v6_xmit, | |
968 | .setsockopt = ipv6_setsockopt, | |
969 | .getsockopt = ipv6_getsockopt, | |
970 | .get_dst = sctp_v6_get_dst, | |
971 | .get_saddr = sctp_v6_get_saddr, | |
972 | .copy_addrlist = sctp_v6_copy_addrlist, | |
973 | .from_skb = sctp_v6_from_skb, | |
974 | .from_sk = sctp_v6_from_sk, | |
975 | .to_sk_saddr = sctp_v6_to_sk_saddr, | |
976 | .to_sk_daddr = sctp_v6_to_sk_daddr, | |
977 | .from_addr_param = sctp_v6_from_addr_param, | |
978 | .to_addr_param = sctp_v6_to_addr_param, | |
543d9cfe ACM |
979 | .cmp_addr = sctp_v6_cmp_addr, |
980 | .scope = sctp_v6_scope, | |
981 | .addr_valid = sctp_v6_addr_valid, | |
982 | .inaddr_any = sctp_v6_inaddr_any, | |
983 | .is_any = sctp_v6_is_any, | |
984 | .available = sctp_v6_available, | |
985 | .skb_iif = sctp_v6_skb_iif, | |
986 | .is_ce = sctp_v6_is_ce, | |
987 | .seq_dump_addr = sctp_v6_seq_dump_addr, | |
b9031d9d | 988 | .ecn_capable = sctp_v6_ecn_capable, |
543d9cfe ACM |
989 | .net_header_len = sizeof(struct ipv6hdr), |
990 | .sockaddr_len = sizeof(struct sockaddr_in6), | |
3fdadf7d | 991 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
992 | .compat_setsockopt = compat_ipv6_setsockopt, |
993 | .compat_getsockopt = compat_ipv6_getsockopt, | |
3fdadf7d | 994 | #endif |
1da177e4 LT |
995 | }; |
996 | ||
15efbe76 | 997 | static struct sctp_pf sctp_pf_inet6 = { |
1da177e4 LT |
998 | .event_msgname = sctp_inet6_event_msgname, |
999 | .skb_msgname = sctp_inet6_skb_msgname, | |
1000 | .af_supported = sctp_inet6_af_supported, | |
1001 | .cmp_addr = sctp_inet6_cmp_addr, | |
1002 | .bind_verify = sctp_inet6_bind_verify, | |
1003 | .send_verify = sctp_inet6_send_verify, | |
1004 | .supported_addrs = sctp_inet6_supported_addrs, | |
1005 | .create_accept_sk = sctp_v6_create_accept_sk, | |
1006 | .addr_v4map = sctp_v6_addr_v4map, | |
15efbe76 | 1007 | .af = &sctp_af_inet6, |
1da177e4 LT |
1008 | }; |
1009 | ||
827bf122 | 1010 | /* Initialize IPv6 support and register with socket layer. */ |
270637ab | 1011 | void sctp_v6_pf_init(void) |
1da177e4 | 1012 | { |
827bf122 | 1013 | /* Register the SCTP specific PF_INET6 functions. */ |
15efbe76 | 1014 | sctp_register_pf(&sctp_pf_inet6, PF_INET6); |
827bf122 SS |
1015 | |
1016 | /* Register the SCTP specific AF_INET6 functions. */ | |
15efbe76 | 1017 | sctp_register_af(&sctp_af_inet6); |
270637ab VY |
1018 | } |
1019 | ||
1020 | void sctp_v6_pf_exit(void) | |
1021 | { | |
1022 | list_del(&sctp_af_inet6.list); | |
1023 | } | |
1024 | ||
1025 | /* Initialize IPv6 support and register with socket layer. */ | |
1026 | int sctp_v6_protosw_init(void) | |
1027 | { | |
1028 | int rc; | |
827bf122 SS |
1029 | |
1030 | rc = proto_register(&sctpv6_prot, 1); | |
1da177e4 | 1031 | if (rc) |
827bf122 | 1032 | return rc; |
1da177e4 LT |
1033 | |
1034 | /* Add SCTPv6(UDP and TCP style) to inetsw6 linked list. */ | |
1035 | inet6_register_protosw(&sctpv6_seqpacket_protosw); | |
1036 | inet6_register_protosw(&sctpv6_stream_protosw); | |
1037 | ||
827bf122 SS |
1038 | return 0; |
1039 | } | |
1da177e4 | 1040 | |
270637ab VY |
1041 | void sctp_v6_protosw_exit(void) |
1042 | { | |
1043 | inet6_unregister_protosw(&sctpv6_seqpacket_protosw); | |
1044 | inet6_unregister_protosw(&sctpv6_stream_protosw); | |
1045 | proto_unregister(&sctpv6_prot); | |
1046 | } | |
1047 | ||
1048 | ||
827bf122 SS |
1049 | /* Register with inet6 layer. */ |
1050 | int sctp_v6_add_protocol(void) | |
1051 | { | |
1da177e4 LT |
1052 | /* Register notifier for inet6 address additions/deletions. */ |
1053 | register_inet6addr_notifier(&sctp_inet6addr_notifier); | |
827bf122 SS |
1054 | |
1055 | if (inet6_add_protocol(&sctpv6_protocol, IPPROTO_SCTP) < 0) | |
1056 | return -EAGAIN; | |
1057 | ||
1058 | return 0; | |
1da177e4 LT |
1059 | } |
1060 | ||
827bf122 SS |
1061 | /* Unregister with inet6 layer. */ |
1062 | void sctp_v6_del_protocol(void) | |
1063 | { | |
1064 | inet6_del_protocol(&sctpv6_protocol, IPPROTO_SCTP); | |
1065 | unregister_inet6addr_notifier(&sctp_inet6addr_notifier); | |
1da177e4 | 1066 | } |