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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 | ||
50 | #include <linux/module.h> | |
51 | #include <linux/errno.h> | |
52 | #include <linux/types.h> | |
53 | #include <linux/socket.h> | |
54 | #include <linux/sockios.h> | |
55 | #include <linux/net.h> | |
1da177e4 LT |
56 | #include <linux/in.h> |
57 | #include <linux/in6.h> | |
58 | #include <linux/netdevice.h> | |
59 | #include <linux/init.h> | |
60 | #include <linux/ipsec.h> | |
61 | ||
62 | #include <linux/ipv6.h> | |
63 | #include <linux/icmpv6.h> | |
64 | #include <linux/random.h> | |
65 | #include <linux/seq_file.h> | |
66 | ||
67 | #include <net/protocol.h> | |
1da177e4 | 68 | #include <net/ndisc.h> |
c752f073 | 69 | #include <net/ip.h> |
1da177e4 LT |
70 | #include <net/ipv6.h> |
71 | #include <net/transp_v6.h> | |
72 | #include <net/addrconf.h> | |
73 | #include <net/ip6_route.h> | |
74 | #include <net/inet_common.h> | |
75 | #include <net/inet_ecn.h> | |
76 | #include <net/sctp/sctp.h> | |
77 | ||
78 | #include <asm/uaccess.h> | |
79 | ||
29303547 VY |
80 | /* Event handler for inet6 address addition/deletion events. |
81 | * The sctp_local_addr_list needs to be protocted by a spin lock since | |
82 | * multiple notifiers (say IPv4 and IPv6) may be running at the same | |
83 | * time and thus corrupt the list. | |
84 | * The reader side is protected with RCU. | |
85 | */ | |
24123186 AB |
86 | static int sctp_inet6addr_event(struct notifier_block *this, unsigned long ev, |
87 | void *ptr) | |
29c7cf96 SS |
88 | { |
89 | struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)ptr; | |
29303547 VY |
90 | struct sctp_sockaddr_entry *addr = NULL; |
91 | struct sctp_sockaddr_entry *temp; | |
22626216 | 92 | int found = 0; |
29c7cf96 SS |
93 | |
94 | switch (ev) { | |
95 | case NETDEV_UP: | |
96 | addr = kmalloc(sizeof(struct sctp_sockaddr_entry), GFP_ATOMIC); | |
97 | if (addr) { | |
98 | addr->a.v6.sin6_family = AF_INET6; | |
99 | addr->a.v6.sin6_port = 0; | |
100 | memcpy(&addr->a.v6.sin6_addr, &ifa->addr, | |
101 | sizeof(struct in6_addr)); | |
102 | addr->a.v6.sin6_scope_id = ifa->idev->dev->ifindex; | |
29303547 VY |
103 | addr->valid = 1; |
104 | spin_lock_bh(&sctp_local_addr_lock); | |
105 | list_add_tail_rcu(&addr->list, &sctp_local_addr_list); | |
106 | spin_unlock_bh(&sctp_local_addr_lock); | |
29c7cf96 SS |
107 | } |
108 | break; | |
109 | case NETDEV_DOWN: | |
29303547 VY |
110 | spin_lock_bh(&sctp_local_addr_lock); |
111 | list_for_each_entry_safe(addr, temp, | |
112 | &sctp_local_addr_list, list) { | |
a40a7d15 PE |
113 | if (addr->a.sa.sa_family == AF_INET6 && |
114 | ipv6_addr_equal(&addr->a.v6.sin6_addr, | |
115 | &ifa->addr)) { | |
22626216 | 116 | found = 1; |
29303547 VY |
117 | addr->valid = 0; |
118 | list_del_rcu(&addr->list); | |
29c7cf96 SS |
119 | break; |
120 | } | |
121 | } | |
29303547 | 122 | spin_unlock_bh(&sctp_local_addr_lock); |
22626216 | 123 | if (found) |
29303547 | 124 | call_rcu(&addr->rcu, sctp_local_addr_free); |
29c7cf96 SS |
125 | break; |
126 | } | |
127 | ||
128 | return NOTIFY_DONE; | |
129 | } | |
130 | ||
1da177e4 | 131 | static struct notifier_block sctp_inet6addr_notifier = { |
29c7cf96 | 132 | .notifier_call = sctp_inet6addr_event, |
1da177e4 LT |
133 | }; |
134 | ||
135 | /* ICMP error handler. */ | |
136 | SCTP_STATIC void sctp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt, | |
04ce6909 | 137 | int type, int code, int offset, __be32 info) |
1da177e4 LT |
138 | { |
139 | struct inet6_dev *idev; | |
1da177e4 | 140 | struct sock *sk; |
1da177e4 LT |
141 | struct sctp_association *asoc; |
142 | struct sctp_transport *transport; | |
143 | struct ipv6_pinfo *np; | |
2e07fa9c | 144 | sk_buff_data_t saveip, savesctp; |
1da177e4 LT |
145 | int err; |
146 | ||
147 | idev = in6_dev_get(skb->dev); | |
148 | ||
149 | /* Fix up skb to look at the embedded net header. */ | |
b0e380b1 ACM |
150 | saveip = skb->network_header; |
151 | savesctp = skb->transport_header; | |
1ced98e8 | 152 | skb_reset_network_header(skb); |
a27ef749 ACM |
153 | skb_set_transport_header(skb, offset); |
154 | sk = sctp_err_lookup(AF_INET6, skb, sctp_hdr(skb), &asoc, &transport); | |
1da177e4 | 155 | /* Put back, the original pointers. */ |
b0e380b1 ACM |
156 | skb->network_header = saveip; |
157 | skb->transport_header = savesctp; | |
1da177e4 LT |
158 | if (!sk) { |
159 | ICMP6_INC_STATS_BH(idev, ICMP6_MIB_INERRORS); | |
160 | goto out; | |
161 | } | |
162 | ||
163 | /* Warning: The sock lock is held. Remember to call | |
164 | * sctp_err_finish! | |
165 | */ | |
166 | ||
167 | switch (type) { | |
168 | case ICMPV6_PKT_TOOBIG: | |
169 | sctp_icmp_frag_needed(sk, asoc, transport, ntohl(info)); | |
170 | goto out_unlock; | |
171 | case ICMPV6_PARAMPROB: | |
172 | if (ICMPV6_UNK_NEXTHDR == code) { | |
d1ad1ff2 | 173 | sctp_icmp_proto_unreachable(sk, asoc, transport); |
1da177e4 LT |
174 | goto out_unlock; |
175 | } | |
176 | break; | |
177 | default: | |
178 | break; | |
179 | } | |
180 | ||
181 | np = inet6_sk(sk); | |
182 | icmpv6_err_convert(type, code, &err); | |
183 | if (!sock_owned_by_user(sk) && np->recverr) { | |
184 | sk->sk_err = err; | |
185 | sk->sk_error_report(sk); | |
186 | } else { /* Only an error on timeout */ | |
187 | sk->sk_err_soft = err; | |
188 | } | |
189 | ||
190 | out_unlock: | |
d1ad1ff2 | 191 | sctp_err_finish(sk, asoc); |
1da177e4 LT |
192 | out: |
193 | if (likely(idev != NULL)) | |
194 | in6_dev_put(idev); | |
195 | } | |
196 | ||
197 | /* Based on tcp_v6_xmit() in tcp_ipv6.c. */ | |
f880374c | 198 | static int sctp_v6_xmit(struct sk_buff *skb, struct sctp_transport *transport) |
1da177e4 LT |
199 | { |
200 | struct sock *sk = skb->sk; | |
201 | struct ipv6_pinfo *np = inet6_sk(sk); | |
202 | struct flowi fl; | |
203 | ||
204 | memset(&fl, 0, sizeof(fl)); | |
205 | ||
206 | fl.proto = sk->sk_protocol; | |
207 | ||
208 | /* Fill in the dest address from the route entry passed with the skb | |
209 | * and the source address from the transport. | |
210 | */ | |
b3f5b3b6 | 211 | ipv6_addr_copy(&fl.fl6_dst, &transport->ipaddr.v6.sin6_addr); |
a9266268 | 212 | ipv6_addr_copy(&fl.fl6_src, &transport->saddr.v6.sin6_addr); |
1da177e4 LT |
213 | |
214 | fl.fl6_flowlabel = np->flow_label; | |
215 | IP6_ECN_flow_xmit(sk, fl.fl6_flowlabel); | |
216 | if (ipv6_addr_type(&fl.fl6_src) & IPV6_ADDR_LINKLOCAL) | |
a9266268 | 217 | fl.oif = transport->saddr.v6.sin6_scope_id; |
1da177e4 LT |
218 | else |
219 | fl.oif = sk->sk_bound_dev_if; | |
1da177e4 LT |
220 | |
221 | if (np->opt && np->opt->srcrt) { | |
222 | struct rt0_hdr *rt0 = (struct rt0_hdr *) np->opt->srcrt; | |
223 | ipv6_addr_copy(&fl.fl6_dst, rt0->addr); | |
224 | } | |
225 | ||
226 | SCTP_DEBUG_PRINTK("%s: skb:%p, len:%d, " | |
46b86a2d | 227 | "src:" NIP6_FMT " dst:" NIP6_FMT "\n", |
0dc47877 | 228 | __func__, skb, skb->len, |
1da177e4 LT |
229 | NIP6(fl.fl6_src), NIP6(fl.fl6_dst)); |
230 | ||
231 | SCTP_INC_STATS(SCTP_MIB_OUTSCTPPACKS); | |
232 | ||
f880374c HX |
233 | if (!(transport->param_flags & SPP_PMTUD_ENABLE)) |
234 | skb->local_df = 1; | |
235 | ||
236 | return ip6_xmit(sk, skb, &fl, np->opt, 0); | |
1da177e4 LT |
237 | } |
238 | ||
239 | /* Returns the dst cache entry for the given source and destination ip | |
240 | * addresses. | |
241 | */ | |
242 | static struct dst_entry *sctp_v6_get_dst(struct sctp_association *asoc, | |
243 | union sctp_addr *daddr, | |
244 | union sctp_addr *saddr) | |
245 | { | |
246 | struct dst_entry *dst; | |
247 | struct flowi fl; | |
248 | ||
249 | memset(&fl, 0, sizeof(fl)); | |
250 | ipv6_addr_copy(&fl.fl6_dst, &daddr->v6.sin6_addr); | |
251 | if (ipv6_addr_type(&daddr->v6.sin6_addr) & IPV6_ADDR_LINKLOCAL) | |
252 | fl.oif = daddr->v6.sin6_scope_id; | |
d808ad9a | 253 | |
1da177e4 | 254 | |
46b86a2d | 255 | SCTP_DEBUG_PRINTK("%s: DST=" NIP6_FMT " ", |
0dc47877 | 256 | __func__, NIP6(fl.fl6_dst)); |
1da177e4 LT |
257 | |
258 | if (saddr) { | |
259 | ipv6_addr_copy(&fl.fl6_src, &saddr->v6.sin6_addr); | |
260 | SCTP_DEBUG_PRINTK( | |
46b86a2d | 261 | "SRC=" NIP6_FMT " - ", |
1da177e4 LT |
262 | NIP6(fl.fl6_src)); |
263 | } | |
264 | ||
4591db4f | 265 | dst = ip6_route_output(&init_net, NULL, &fl); |
4251320f | 266 | if (!dst->error) { |
1da177e4 LT |
267 | struct rt6_info *rt; |
268 | rt = (struct rt6_info *)dst; | |
269 | SCTP_DEBUG_PRINTK( | |
46b86a2d | 270 | "rt6_dst:" NIP6_FMT " rt6_src:" NIP6_FMT "\n", |
1da177e4 | 271 | NIP6(rt->rt6i_dst.addr), NIP6(rt->rt6i_src.addr)); |
4251320f | 272 | return dst; |
1da177e4 | 273 | } |
4251320f VN |
274 | SCTP_DEBUG_PRINTK("NO ROUTE\n"); |
275 | dst_release(dst); | |
276 | return NULL; | |
1da177e4 LT |
277 | } |
278 | ||
279 | /* Returns the number of consecutive initial bits that match in the 2 ipv6 | |
280 | * addresses. | |
281 | */ | |
282 | static inline int sctp_v6_addr_match_len(union sctp_addr *s1, | |
283 | union sctp_addr *s2) | |
284 | { | |
285 | struct in6_addr *a1 = &s1->v6.sin6_addr; | |
286 | struct in6_addr *a2 = &s2->v6.sin6_addr; | |
287 | int i, j; | |
288 | ||
289 | for (i = 0; i < 4 ; i++) { | |
dbc16db1 | 290 | __be32 a1xora2; |
1da177e4 LT |
291 | |
292 | a1xora2 = a1->s6_addr32[i] ^ a2->s6_addr32[i]; | |
293 | ||
294 | if ((j = fls(ntohl(a1xora2)))) | |
295 | return (i * 32 + 32 - j); | |
296 | } | |
297 | ||
298 | return (i*32); | |
299 | } | |
300 | ||
301 | /* Fills in the source address(saddr) based on the destination address(daddr) | |
302 | * and asoc's bind address list. | |
303 | */ | |
e5117101 YH |
304 | static void sctp_v6_get_saddr(struct sctp_sock *sk, |
305 | struct sctp_association *asoc, | |
1da177e4 LT |
306 | struct dst_entry *dst, |
307 | union sctp_addr *daddr, | |
308 | union sctp_addr *saddr) | |
309 | { | |
310 | struct sctp_bind_addr *bp; | |
1da177e4 | 311 | struct sctp_sockaddr_entry *laddr; |
1da177e4 LT |
312 | sctp_scope_t scope; |
313 | union sctp_addr *baddr = NULL; | |
314 | __u8 matchlen = 0; | |
315 | __u8 bmatchlen; | |
316 | ||
317 | SCTP_DEBUG_PRINTK("%s: asoc:%p dst:%p " | |
46b86a2d | 318 | "daddr:" NIP6_FMT " ", |
0dc47877 | 319 | __func__, asoc, dst, NIP6(daddr->v6.sin6_addr)); |
1da177e4 LT |
320 | |
321 | if (!asoc) { | |
191cd582 BH |
322 | ipv6_dev_get_saddr(sock_net(sctp_opt2sk(sk)), |
323 | dst ? ip6_dst_idev(dst)->dev : NULL, | |
7cbca67c | 324 | &daddr->v6.sin6_addr, |
e5117101 | 325 | inet6_sk(&sk->inet.sk)->srcprefs, |
7cbca67c | 326 | &saddr->v6.sin6_addr); |
46b86a2d | 327 | SCTP_DEBUG_PRINTK("saddr from ipv6_get_saddr: " NIP6_FMT "\n", |
1da177e4 LT |
328 | NIP6(saddr->v6.sin6_addr)); |
329 | return; | |
330 | } | |
331 | ||
332 | scope = sctp_scope(daddr); | |
333 | ||
334 | bp = &asoc->base.bind_addr; | |
1da177e4 LT |
335 | |
336 | /* Go through the bind address list and find the best source address | |
337 | * that matches the scope of the destination address. | |
338 | */ | |
559cf710 VY |
339 | rcu_read_lock(); |
340 | list_for_each_entry_rcu(laddr, &bp->address_list, list) { | |
341 | if (!laddr->valid) | |
342 | continue; | |
f57d96b2 | 343 | if ((laddr->state == SCTP_ADDR_SRC) && |
6244be4e AV |
344 | (laddr->a.sa.sa_family == AF_INET6) && |
345 | (scope <= sctp_scope(&laddr->a))) { | |
d3f7a54a | 346 | bmatchlen = sctp_v6_addr_match_len(daddr, &laddr->a); |
1da177e4 | 347 | if (!baddr || (matchlen < bmatchlen)) { |
d3f7a54a | 348 | baddr = &laddr->a; |
1da177e4 LT |
349 | matchlen = bmatchlen; |
350 | } | |
351 | } | |
352 | } | |
353 | ||
354 | if (baddr) { | |
355 | memcpy(saddr, baddr, sizeof(union sctp_addr)); | |
46b86a2d | 356 | SCTP_DEBUG_PRINTK("saddr: " NIP6_FMT "\n", |
1da177e4 LT |
357 | NIP6(saddr->v6.sin6_addr)); |
358 | } else { | |
359 | printk(KERN_ERR "%s: asoc:%p Could not find a valid source " | |
46b86a2d | 360 | "address for the dest:" NIP6_FMT "\n", |
0dc47877 | 361 | __func__, asoc, NIP6(daddr->v6.sin6_addr)); |
1da177e4 LT |
362 | } |
363 | ||
559cf710 | 364 | rcu_read_unlock(); |
1da177e4 LT |
365 | } |
366 | ||
367 | /* Make a copy of all potential local addresses. */ | |
368 | static void sctp_v6_copy_addrlist(struct list_head *addrlist, | |
369 | struct net_device *dev) | |
370 | { | |
371 | struct inet6_dev *in6_dev; | |
372 | struct inet6_ifaddr *ifp; | |
373 | struct sctp_sockaddr_entry *addr; | |
374 | ||
8814c4b5 | 375 | rcu_read_lock(); |
1da177e4 | 376 | if ((in6_dev = __in6_dev_get(dev)) == NULL) { |
8814c4b5 | 377 | rcu_read_unlock(); |
1da177e4 LT |
378 | return; |
379 | } | |
380 | ||
e2eb8d45 | 381 | read_lock_bh(&in6_dev->lock); |
1da177e4 LT |
382 | for (ifp = in6_dev->addr_list; ifp; ifp = ifp->if_next) { |
383 | /* Add the address to the local list. */ | |
384 | addr = t_new(struct sctp_sockaddr_entry, GFP_ATOMIC); | |
385 | if (addr) { | |
2a6fd78a AV |
386 | addr->a.v6.sin6_family = AF_INET6; |
387 | addr->a.v6.sin6_port = 0; | |
388 | addr->a.v6.sin6_addr = ifp->addr; | |
389 | addr->a.v6.sin6_scope_id = dev->ifindex; | |
29303547 | 390 | addr->valid = 1; |
1da177e4 | 391 | INIT_LIST_HEAD(&addr->list); |
29303547 | 392 | INIT_RCU_HEAD(&addr->rcu); |
1da177e4 LT |
393 | list_add_tail(&addr->list, addrlist); |
394 | } | |
395 | } | |
396 | ||
e2eb8d45 | 397 | read_unlock_bh(&in6_dev->lock); |
8814c4b5 | 398 | rcu_read_unlock(); |
1da177e4 LT |
399 | } |
400 | ||
401 | /* Initialize a sockaddr_storage from in incoming skb. */ | |
402 | static void sctp_v6_from_skb(union sctp_addr *addr,struct sk_buff *skb, | |
403 | int is_saddr) | |
404 | { | |
405 | void *from; | |
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; |
0660e03f | 417 | from = &ipv6_hdr(skb)->saddr; |
1da177e4 | 418 | } else { |
d55c41b1 | 419 | *port = sh->dest; |
0660e03f | 420 | from = &ipv6_hdr(skb)->daddr; |
1da177e4 LT |
421 | } |
422 | ipv6_addr_copy(&addr->v6.sin6_addr, from); | |
423 | } | |
424 | ||
425 | /* Initialize an sctp_addr from a socket. */ | |
426 | static void sctp_v6_from_sk(union sctp_addr *addr, struct sock *sk) | |
427 | { | |
428 | addr->v6.sin6_family = AF_INET6; | |
7dcdbd95 | 429 | addr->v6.sin6_port = 0; |
1da177e4 LT |
430 | addr->v6.sin6_addr = inet6_sk(sk)->rcv_saddr; |
431 | } | |
432 | ||
433 | /* Initialize sk->sk_rcv_saddr from sctp_addr. */ | |
434 | static void sctp_v6_to_sk_saddr(union sctp_addr *addr, struct sock *sk) | |
435 | { | |
436 | if (addr->sa.sa_family == AF_INET && sctp_sk(sk)->v4mapped) { | |
437 | inet6_sk(sk)->rcv_saddr.s6_addr32[0] = 0; | |
438 | inet6_sk(sk)->rcv_saddr.s6_addr32[1] = 0; | |
439 | inet6_sk(sk)->rcv_saddr.s6_addr32[2] = htonl(0x0000ffff); | |
440 | inet6_sk(sk)->rcv_saddr.s6_addr32[3] = | |
441 | addr->v4.sin_addr.s_addr; | |
442 | } else { | |
443 | inet6_sk(sk)->rcv_saddr = addr->v6.sin6_addr; | |
444 | } | |
445 | } | |
446 | ||
447 | /* Initialize sk->sk_daddr from sctp_addr. */ | |
448 | static void sctp_v6_to_sk_daddr(union sctp_addr *addr, struct sock *sk) | |
449 | { | |
450 | if (addr->sa.sa_family == AF_INET && sctp_sk(sk)->v4mapped) { | |
451 | inet6_sk(sk)->daddr.s6_addr32[0] = 0; | |
452 | inet6_sk(sk)->daddr.s6_addr32[1] = 0; | |
453 | inet6_sk(sk)->daddr.s6_addr32[2] = htonl(0x0000ffff); | |
454 | inet6_sk(sk)->daddr.s6_addr32[3] = addr->v4.sin_addr.s_addr; | |
455 | } else { | |
456 | inet6_sk(sk)->daddr = addr->v6.sin6_addr; | |
457 | } | |
458 | } | |
459 | ||
460 | /* Initialize a sctp_addr from an address parameter. */ | |
461 | static void sctp_v6_from_addr_param(union sctp_addr *addr, | |
462 | union sctp_addr_param *param, | |
dd86d136 | 463 | __be16 port, int iif) |
1da177e4 LT |
464 | { |
465 | addr->v6.sin6_family = AF_INET6; | |
466 | addr->v6.sin6_port = port; | |
467 | addr->v6.sin6_flowinfo = 0; /* BUG */ | |
468 | ipv6_addr_copy(&addr->v6.sin6_addr, ¶m->v6.addr); | |
469 | addr->v6.sin6_scope_id = iif; | |
470 | } | |
471 | ||
472 | /* Initialize an address parameter from a sctp_addr and return the length | |
473 | * of the address parameter. | |
474 | */ | |
475 | static int sctp_v6_to_addr_param(const union sctp_addr *addr, | |
476 | union sctp_addr_param *param) | |
477 | { | |
478 | int length = sizeof(sctp_ipv6addr_param_t); | |
479 | ||
480 | param->v6.param_hdr.type = SCTP_PARAM_IPV6_ADDRESS; | |
dbc16db1 | 481 | param->v6.param_hdr.length = htons(length); |
1da177e4 LT |
482 | ipv6_addr_copy(¶m->v6.addr, &addr->v6.sin6_addr); |
483 | ||
484 | return length; | |
485 | } | |
486 | ||
487 | /* Initialize a sctp_addr from a dst_entry. */ | |
488 | static void sctp_v6_dst_saddr(union sctp_addr *addr, struct dst_entry *dst, | |
854d43a4 | 489 | __be16 port) |
1da177e4 LT |
490 | { |
491 | struct rt6_info *rt = (struct rt6_info *)dst; | |
492 | addr->sa.sa_family = AF_INET6; | |
493 | addr->v6.sin6_port = port; | |
494 | ipv6_addr_copy(&addr->v6.sin6_addr, &rt->rt6i_src.addr); | |
495 | } | |
496 | ||
497 | /* Compare addresses exactly. | |
498 | * v4-mapped-v6 is also in consideration. | |
499 | */ | |
500 | static int sctp_v6_cmp_addr(const union sctp_addr *addr1, | |
501 | const union sctp_addr *addr2) | |
502 | { | |
503 | if (addr1->sa.sa_family != addr2->sa.sa_family) { | |
504 | if (addr1->sa.sa_family == AF_INET && | |
505 | addr2->sa.sa_family == AF_INET6 && | |
e773e4fa | 506 | ipv6_addr_v4mapped(&addr2->v6.sin6_addr)) { |
1da177e4 LT |
507 | if (addr2->v6.sin6_port == addr1->v4.sin_port && |
508 | addr2->v6.sin6_addr.s6_addr32[3] == | |
509 | addr1->v4.sin_addr.s_addr) | |
510 | return 1; | |
511 | } | |
512 | if (addr2->sa.sa_family == AF_INET && | |
513 | addr1->sa.sa_family == AF_INET6 && | |
e773e4fa | 514 | ipv6_addr_v4mapped(&addr1->v6.sin6_addr)) { |
1da177e4 LT |
515 | if (addr1->v6.sin6_port == addr2->v4.sin_port && |
516 | addr1->v6.sin6_addr.s6_addr32[3] == | |
517 | addr2->v4.sin_addr.s_addr) | |
518 | return 1; | |
519 | } | |
520 | return 0; | |
521 | } | |
522 | if (!ipv6_addr_equal(&addr1->v6.sin6_addr, &addr2->v6.sin6_addr)) | |
523 | return 0; | |
524 | /* If this is a linklocal address, compare the scope_id. */ | |
525 | if (ipv6_addr_type(&addr1->v6.sin6_addr) & IPV6_ADDR_LINKLOCAL) { | |
526 | if (addr1->v6.sin6_scope_id && addr2->v6.sin6_scope_id && | |
527 | (addr1->v6.sin6_scope_id != addr2->v6.sin6_scope_id)) { | |
528 | return 0; | |
529 | } | |
530 | } | |
531 | ||
532 | return 1; | |
533 | } | |
534 | ||
535 | /* Initialize addr struct to INADDR_ANY. */ | |
6fbfa9f9 | 536 | static void sctp_v6_inaddr_any(union sctp_addr *addr, __be16 port) |
1da177e4 LT |
537 | { |
538 | memset(addr, 0x00, sizeof(union sctp_addr)); | |
539 | addr->v6.sin6_family = AF_INET6; | |
540 | addr->v6.sin6_port = port; | |
541 | } | |
542 | ||
543 | /* Is this a wildcard address? */ | |
544 | static int sctp_v6_is_any(const union sctp_addr *addr) | |
545 | { | |
b9b9e10f | 546 | return ipv6_addr_any(&addr->v6.sin6_addr); |
1da177e4 LT |
547 | } |
548 | ||
549 | /* Should this be available for binding? */ | |
550 | static int sctp_v6_available(union sctp_addr *addr, struct sctp_sock *sp) | |
551 | { | |
552 | int type; | |
553 | struct in6_addr *in6 = (struct in6_addr *)&addr->v6.sin6_addr; | |
554 | ||
555 | type = ipv6_addr_type(in6); | |
556 | if (IPV6_ADDR_ANY == type) | |
557 | return 1; | |
558 | if (type == IPV6_ADDR_MAPPED) { | |
559 | if (sp && !sp->v4mapped) | |
560 | return 0; | |
561 | if (sp && ipv6_only_sock(sctp_opt2sk(sp))) | |
562 | return 0; | |
563 | sctp_v6_map_v4(addr); | |
564 | return sctp_get_af_specific(AF_INET)->available(addr, sp); | |
565 | } | |
566 | if (!(type & IPV6_ADDR_UNICAST)) | |
567 | return 0; | |
568 | ||
bfeade08 | 569 | return ipv6_chk_addr(&init_net, in6, NULL, 0); |
1da177e4 LT |
570 | } |
571 | ||
572 | /* This function checks if the address is a valid address to be used for | |
573 | * SCTP. | |
574 | * | |
575 | * Output: | |
576 | * Return 0 - If the address is a non-unicast or an illegal address. | |
577 | * Return 1 - If the address is a unicast. | |
578 | */ | |
5636bef7 VY |
579 | static int sctp_v6_addr_valid(union sctp_addr *addr, |
580 | struct sctp_sock *sp, | |
581 | const struct sk_buff *skb) | |
1da177e4 LT |
582 | { |
583 | int ret = ipv6_addr_type(&addr->v6.sin6_addr); | |
584 | ||
585 | /* Support v4-mapped-v6 address. */ | |
586 | if (ret == IPV6_ADDR_MAPPED) { | |
587 | /* Note: This routine is used in input, so v4-mapped-v6 | |
588 | * are disallowed here when there is no sctp_sock. | |
589 | */ | |
590 | if (!sp || !sp->v4mapped) | |
591 | return 0; | |
592 | if (sp && ipv6_only_sock(sctp_opt2sk(sp))) | |
593 | return 0; | |
594 | sctp_v6_map_v4(addr); | |
5636bef7 | 595 | return sctp_get_af_specific(AF_INET)->addr_valid(addr, sp, skb); |
1da177e4 LT |
596 | } |
597 | ||
598 | /* Is this a non-unicast address */ | |
599 | if (!(ret & IPV6_ADDR_UNICAST)) | |
600 | return 0; | |
601 | ||
602 | return 1; | |
603 | } | |
604 | ||
605 | /* What is the scope of 'addr'? */ | |
606 | static sctp_scope_t sctp_v6_scope(union sctp_addr *addr) | |
607 | { | |
608 | int v6scope; | |
609 | sctp_scope_t retval; | |
610 | ||
611 | /* The IPv6 scope is really a set of bit fields. | |
612 | * See IFA_* in <net/if_inet6.h>. Map to a generic SCTP scope. | |
613 | */ | |
614 | ||
615 | v6scope = ipv6_addr_scope(&addr->v6.sin6_addr); | |
616 | switch (v6scope) { | |
617 | case IFA_HOST: | |
618 | retval = SCTP_SCOPE_LOOPBACK; | |
619 | break; | |
620 | case IFA_LINK: | |
621 | retval = SCTP_SCOPE_LINK; | |
622 | break; | |
623 | case IFA_SITE: | |
624 | retval = SCTP_SCOPE_PRIVATE; | |
625 | break; | |
626 | default: | |
627 | retval = SCTP_SCOPE_GLOBAL; | |
628 | break; | |
3ff50b79 | 629 | } |
1da177e4 LT |
630 | |
631 | return retval; | |
632 | } | |
633 | ||
634 | /* Create and initialize a new sk for the socket to be returned by accept(). */ | |
635 | static struct sock *sctp_v6_create_accept_sk(struct sock *sk, | |
636 | struct sctp_association *asoc) | |
637 | { | |
638 | struct inet_sock *inet = inet_sk(sk); | |
639 | struct sock *newsk; | |
640 | struct inet_sock *newinet; | |
641 | struct ipv6_pinfo *newnp, *np = inet6_sk(sk); | |
642 | struct sctp6_sock *newsctp6sk; | |
643 | ||
3b1e0a65 | 644 | newsk = sk_alloc(sock_net(sk), PF_INET6, GFP_KERNEL, sk->sk_prot); |
1da177e4 LT |
645 | if (!newsk) |
646 | goto out; | |
647 | ||
648 | sock_init_data(NULL, newsk); | |
649 | ||
650 | newsk->sk_type = SOCK_STREAM; | |
651 | ||
652 | newsk->sk_prot = sk->sk_prot; | |
653 | newsk->sk_no_check = sk->sk_no_check; | |
654 | newsk->sk_reuse = sk->sk_reuse; | |
655 | ||
656 | newsk->sk_destruct = inet_sock_destruct; | |
657 | newsk->sk_family = PF_INET6; | |
658 | newsk->sk_protocol = IPPROTO_SCTP; | |
659 | newsk->sk_backlog_rcv = sk->sk_prot->backlog_rcv; | |
660 | newsk->sk_shutdown = sk->sk_shutdown; | |
661 | sock_reset_flag(sk, SOCK_ZAPPED); | |
662 | ||
663 | newsctp6sk = (struct sctp6_sock *)newsk; | |
664 | inet_sk(newsk)->pinet6 = &newsctp6sk->inet6; | |
665 | ||
b225b884 DJ |
666 | sctp_sk(newsk)->v4mapped = sctp_sk(sk)->v4mapped; |
667 | ||
1da177e4 LT |
668 | newinet = inet_sk(newsk); |
669 | newnp = inet6_sk(newsk); | |
670 | ||
671 | memcpy(newnp, np, sizeof(struct ipv6_pinfo)); | |
672 | ||
673 | /* Initialize sk's sport, dport, rcv_saddr and daddr for getsockname() | |
674 | * and getpeername(). | |
675 | */ | |
676 | newinet->sport = inet->sport; | |
677 | newnp->saddr = np->saddr; | |
678 | newnp->rcv_saddr = np->rcv_saddr; | |
679 | newinet->dport = htons(asoc->peer.port); | |
680 | sctp_v6_to_sk_daddr(&asoc->peer.primary_addr, newsk); | |
681 | ||
682 | /* Init the ipv4 part of the socket since we can have sockets | |
683 | * using v6 API for ipv4. | |
684 | */ | |
685 | newinet->uc_ttl = -1; | |
686 | newinet->mc_loop = 1; | |
687 | newinet->mc_ttl = 1; | |
688 | newinet->mc_index = 0; | |
689 | newinet->mc_list = NULL; | |
690 | ||
691 | if (ipv4_config.no_pmtu_disc) | |
692 | newinet->pmtudisc = IP_PMTUDISC_DONT; | |
693 | else | |
694 | newinet->pmtudisc = IP_PMTUDISC_WANT; | |
695 | ||
e6848976 | 696 | sk_refcnt_debug_inc(newsk); |
1da177e4 LT |
697 | |
698 | if (newsk->sk_prot->init(newsk)) { | |
699 | sk_common_release(newsk); | |
700 | newsk = NULL; | |
701 | } | |
702 | ||
703 | out: | |
704 | return newsk; | |
705 | } | |
706 | ||
707 | /* Map v4 address to mapped v6 address */ | |
708 | static void sctp_v6_addr_v4map(struct sctp_sock *sp, union sctp_addr *addr) | |
709 | { | |
710 | if (sp->v4mapped && AF_INET == addr->sa.sa_family) | |
711 | sctp_v4_map_v6(addr); | |
712 | } | |
713 | ||
714 | /* Where did this skb come from? */ | |
715 | static int sctp_v6_skb_iif(const struct sk_buff *skb) | |
716 | { | |
717 | struct inet6_skb_parm *opt = (struct inet6_skb_parm *) skb->cb; | |
718 | return opt->iif; | |
719 | } | |
720 | ||
721 | /* Was this packet marked by Explicit Congestion Notification? */ | |
722 | static int sctp_v6_is_ce(const struct sk_buff *skb) | |
723 | { | |
0660e03f | 724 | return *((__u32 *)(ipv6_hdr(skb))) & htonl(1 << 20); |
1da177e4 LT |
725 | } |
726 | ||
727 | /* Dump the v6 addr to the seq file. */ | |
728 | static void sctp_v6_seq_dump_addr(struct seq_file *seq, union sctp_addr *addr) | |
729 | { | |
46b86a2d | 730 | seq_printf(seq, NIP6_FMT " ", NIP6(addr->v6.sin6_addr)); |
1da177e4 LT |
731 | } |
732 | ||
b9031d9d VY |
733 | static void sctp_v6_ecn_capable(struct sock *sk) |
734 | { | |
735 | inet6_sk(sk)->tclass |= INET_ECN_ECT_0; | |
736 | } | |
737 | ||
1da177e4 LT |
738 | /* Initialize a PF_INET6 socket msg_name. */ |
739 | static void sctp_inet6_msgname(char *msgname, int *addr_len) | |
740 | { | |
741 | struct sockaddr_in6 *sin6; | |
742 | ||
743 | sin6 = (struct sockaddr_in6 *)msgname; | |
744 | sin6->sin6_family = AF_INET6; | |
745 | sin6->sin6_flowinfo = 0; | |
746 | sin6->sin6_scope_id = 0; /*FIXME */ | |
747 | *addr_len = sizeof(struct sockaddr_in6); | |
748 | } | |
749 | ||
750 | /* Initialize a PF_INET msgname from a ulpevent. */ | |
751 | static void sctp_inet6_event_msgname(struct sctp_ulpevent *event, | |
752 | char *msgname, int *addrlen) | |
753 | { | |
754 | struct sockaddr_in6 *sin6, *sin6from; | |
755 | ||
756 | if (msgname) { | |
757 | union sctp_addr *addr; | |
758 | struct sctp_association *asoc; | |
759 | ||
760 | asoc = event->asoc; | |
761 | sctp_inet6_msgname(msgname, addrlen); | |
762 | sin6 = (struct sockaddr_in6 *)msgname; | |
763 | sin6->sin6_port = htons(asoc->peer.port); | |
764 | addr = &asoc->peer.primary_addr; | |
765 | ||
766 | /* Note: If we go to a common v6 format, this code | |
767 | * will change. | |
768 | */ | |
769 | ||
770 | /* Map ipv4 address into v4-mapped-on-v6 address. */ | |
771 | if (sctp_sk(asoc->base.sk)->v4mapped && | |
772 | AF_INET == addr->sa.sa_family) { | |
773 | sctp_v4_map_v6((union sctp_addr *)sin6); | |
774 | sin6->sin6_addr.s6_addr32[3] = | |
775 | addr->v4.sin_addr.s_addr; | |
776 | return; | |
777 | } | |
778 | ||
779 | sin6from = &asoc->peer.primary_addr.v6; | |
780 | ipv6_addr_copy(&sin6->sin6_addr, &sin6from->sin6_addr); | |
781 | if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) | |
782 | sin6->sin6_scope_id = sin6from->sin6_scope_id; | |
783 | } | |
784 | } | |
785 | ||
786 | /* Initialize a msg_name from an inbound skb. */ | |
787 | static void sctp_inet6_skb_msgname(struct sk_buff *skb, char *msgname, | |
788 | int *addr_len) | |
789 | { | |
790 | struct sctphdr *sh; | |
791 | struct sockaddr_in6 *sin6; | |
792 | ||
793 | if (msgname) { | |
794 | sctp_inet6_msgname(msgname, addr_len); | |
795 | sin6 = (struct sockaddr_in6 *)msgname; | |
2c0fd387 | 796 | sh = sctp_hdr(skb); |
1da177e4 LT |
797 | sin6->sin6_port = sh->source; |
798 | ||
799 | /* Map ipv4 address into v4-mapped-on-v6 address. */ | |
800 | if (sctp_sk(skb->sk)->v4mapped && | |
eddc9ec5 | 801 | ip_hdr(skb)->version == 4) { |
1da177e4 | 802 | sctp_v4_map_v6((union sctp_addr *)sin6); |
eddc9ec5 | 803 | sin6->sin6_addr.s6_addr32[3] = ip_hdr(skb)->saddr; |
1da177e4 LT |
804 | return; |
805 | } | |
806 | ||
807 | /* Otherwise, just copy the v6 address. */ | |
0660e03f | 808 | ipv6_addr_copy(&sin6->sin6_addr, &ipv6_hdr(skb)->saddr); |
1da177e4 LT |
809 | if (ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) { |
810 | struct sctp_ulpevent *ev = sctp_skb2event(skb); | |
811 | sin6->sin6_scope_id = ev->iif; | |
812 | } | |
813 | } | |
814 | } | |
815 | ||
816 | /* Do we support this AF? */ | |
817 | static int sctp_inet6_af_supported(sa_family_t family, struct sctp_sock *sp) | |
818 | { | |
819 | switch (family) { | |
820 | case AF_INET6: | |
821 | return 1; | |
822 | /* v4-mapped-v6 addresses */ | |
823 | case AF_INET: | |
7dab83de | 824 | if (!__ipv6_only_sock(sctp_opt2sk(sp))) |
1da177e4 LT |
825 | return 1; |
826 | default: | |
827 | return 0; | |
828 | } | |
829 | } | |
830 | ||
831 | /* Address matching with wildcards allowed. This extra level | |
832 | * of indirection lets us choose whether a PF_INET6 should | |
833 | * disallow any v4 addresses if we so choose. | |
834 | */ | |
835 | static int sctp_inet6_cmp_addr(const union sctp_addr *addr1, | |
836 | const union sctp_addr *addr2, | |
837 | struct sctp_sock *opt) | |
838 | { | |
839 | struct sctp_af *af1, *af2; | |
840 | ||
841 | af1 = sctp_get_af_specific(addr1->sa.sa_family); | |
842 | af2 = sctp_get_af_specific(addr2->sa.sa_family); | |
843 | ||
844 | if (!af1 || !af2) | |
845 | return 0; | |
7dab83de VY |
846 | |
847 | /* If the socket is IPv6 only, v4 addrs will not match */ | |
848 | if (__ipv6_only_sock(sctp_opt2sk(opt)) && af1 != af2) | |
849 | return 0; | |
850 | ||
1da177e4 LT |
851 | /* Today, wildcard AF_INET/AF_INET6. */ |
852 | if (sctp_is_any(addr1) || sctp_is_any(addr2)) | |
853 | return 1; | |
854 | ||
855 | if (addr1->sa.sa_family != addr2->sa.sa_family) | |
856 | return 0; | |
857 | ||
858 | return af1->cmp_addr(addr1, addr2); | |
859 | } | |
860 | ||
861 | /* Verify that the provided sockaddr looks bindable. Common verification, | |
862 | * has already been taken care of. | |
863 | */ | |
864 | static int sctp_inet6_bind_verify(struct sctp_sock *opt, union sctp_addr *addr) | |
865 | { | |
866 | struct sctp_af *af; | |
867 | ||
868 | /* ASSERT: address family has already been verified. */ | |
869 | if (addr->sa.sa_family != AF_INET6) | |
870 | af = sctp_get_af_specific(addr->sa.sa_family); | |
871 | else { | |
1da177e4 | 872 | int type = ipv6_addr_type(&addr->v6.sin6_addr); |
6a6ddb2a SS |
873 | struct net_device *dev; |
874 | ||
1da177e4 | 875 | if (type & IPV6_ADDR_LINKLOCAL) { |
6a6ddb2a SS |
876 | if (!addr->v6.sin6_scope_id) |
877 | return 0; | |
881d966b | 878 | dev = dev_get_by_index(&init_net, addr->v6.sin6_scope_id); |
6a6ddb2a | 879 | if (!dev) |
1da177e4 | 880 | return 0; |
bfeade08 DL |
881 | if (!ipv6_chk_addr(&init_net, &addr->v6.sin6_addr, |
882 | dev, 0)) { | |
1669d857 VY |
883 | dev_put(dev); |
884 | return 0; | |
885 | } | |
6a6ddb2a | 886 | dev_put(dev); |
7dab83de VY |
887 | } else if (type == IPV6_ADDR_MAPPED) { |
888 | if (!opt->v4mapped) | |
889 | return 0; | |
1da177e4 | 890 | } |
7dab83de | 891 | |
1da177e4 LT |
892 | af = opt->pf->af; |
893 | } | |
894 | return af->available(addr, opt); | |
895 | } | |
896 | ||
6a6ddb2a | 897 | /* Verify that the provided sockaddr looks sendable. Common verification, |
1da177e4 LT |
898 | * has already been taken care of. |
899 | */ | |
900 | static int sctp_inet6_send_verify(struct sctp_sock *opt, union sctp_addr *addr) | |
901 | { | |
902 | struct sctp_af *af = NULL; | |
903 | ||
904 | /* ASSERT: address family has already been verified. */ | |
905 | if (addr->sa.sa_family != AF_INET6) | |
906 | af = sctp_get_af_specific(addr->sa.sa_family); | |
907 | else { | |
1da177e4 | 908 | int type = ipv6_addr_type(&addr->v6.sin6_addr); |
6a6ddb2a SS |
909 | struct net_device *dev; |
910 | ||
1da177e4 | 911 | if (type & IPV6_ADDR_LINKLOCAL) { |
6a6ddb2a SS |
912 | if (!addr->v6.sin6_scope_id) |
913 | return 0; | |
881d966b | 914 | dev = dev_get_by_index(&init_net, addr->v6.sin6_scope_id); |
6a6ddb2a | 915 | if (!dev) |
1da177e4 | 916 | return 0; |
6a6ddb2a | 917 | dev_put(dev); |
1da177e4 LT |
918 | } |
919 | af = opt->pf->af; | |
920 | } | |
921 | ||
922 | return af != NULL; | |
923 | } | |
924 | ||
925 | /* Fill in Supported Address Type information for INIT and INIT-ACK | |
926 | * chunks. Note: In the future, we may want to look at sock options | |
927 | * to determine whether a PF_INET6 socket really wants to have IPV4 | |
928 | * addresses. | |
929 | * Returns number of addresses supported. | |
930 | */ | |
931 | static int sctp_inet6_supported_addrs(const struct sctp_sock *opt, | |
3dbe8656 | 932 | __be16 *types) |
1da177e4 | 933 | { |
7dab83de VY |
934 | types[0] = SCTP_PARAM_IPV6_ADDRESS; |
935 | if (!opt || !ipv6_only_sock(sctp_opt2sk(opt))) { | |
936 | types[1] = SCTP_PARAM_IPV4_ADDRESS; | |
937 | return 2; | |
938 | } | |
939 | return 1; | |
1da177e4 LT |
940 | } |
941 | ||
90ddc4f0 | 942 | static const struct proto_ops inet6_seqpacket_ops = { |
543d9cfe ACM |
943 | .family = PF_INET6, |
944 | .owner = THIS_MODULE, | |
945 | .release = inet6_release, | |
946 | .bind = inet6_bind, | |
947 | .connect = inet_dgram_connect, | |
948 | .socketpair = sock_no_socketpair, | |
949 | .accept = inet_accept, | |
950 | .getname = inet6_getname, | |
951 | .poll = sctp_poll, | |
952 | .ioctl = inet6_ioctl, | |
953 | .listen = sctp_inet_listen, | |
954 | .shutdown = inet_shutdown, | |
955 | .setsockopt = sock_common_setsockopt, | |
956 | .getsockopt = sock_common_getsockopt, | |
957 | .sendmsg = inet_sendmsg, | |
958 | .recvmsg = sock_common_recvmsg, | |
959 | .mmap = sock_no_mmap, | |
3fdadf7d | 960 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
961 | .compat_setsockopt = compat_sock_common_setsockopt, |
962 | .compat_getsockopt = compat_sock_common_getsockopt, | |
3fdadf7d | 963 | #endif |
1da177e4 LT |
964 | }; |
965 | ||
966 | static struct inet_protosw sctpv6_seqpacket_protosw = { | |
967 | .type = SOCK_SEQPACKET, | |
968 | .protocol = IPPROTO_SCTP, | |
969 | .prot = &sctpv6_prot, | |
970 | .ops = &inet6_seqpacket_ops, | |
971 | .capability = -1, | |
972 | .no_check = 0, | |
973 | .flags = SCTP_PROTOSW_FLAG | |
974 | }; | |
975 | static struct inet_protosw sctpv6_stream_protosw = { | |
976 | .type = SOCK_STREAM, | |
977 | .protocol = IPPROTO_SCTP, | |
978 | .prot = &sctpv6_prot, | |
979 | .ops = &inet6_seqpacket_ops, | |
980 | .capability = -1, | |
981 | .no_check = 0, | |
982 | .flags = SCTP_PROTOSW_FLAG, | |
983 | }; | |
984 | ||
e5bbef20 | 985 | static int sctp6_rcv(struct sk_buff *skb) |
1da177e4 | 986 | { |
e5bbef20 | 987 | return sctp_rcv(skb) ? -1 : 0; |
1da177e4 LT |
988 | } |
989 | ||
990 | static struct inet6_protocol sctpv6_protocol = { | |
991 | .handler = sctp6_rcv, | |
992 | .err_handler = sctp_v6_err, | |
993 | .flags = INET6_PROTO_NOPOLICY | INET6_PROTO_FINAL, | |
994 | }; | |
995 | ||
15efbe76 | 996 | static struct sctp_af sctp_af_inet6 = { |
543d9cfe ACM |
997 | .sa_family = AF_INET6, |
998 | .sctp_xmit = sctp_v6_xmit, | |
999 | .setsockopt = ipv6_setsockopt, | |
1000 | .getsockopt = ipv6_getsockopt, | |
1001 | .get_dst = sctp_v6_get_dst, | |
1002 | .get_saddr = sctp_v6_get_saddr, | |
1003 | .copy_addrlist = sctp_v6_copy_addrlist, | |
1004 | .from_skb = sctp_v6_from_skb, | |
1005 | .from_sk = sctp_v6_from_sk, | |
1006 | .to_sk_saddr = sctp_v6_to_sk_saddr, | |
1007 | .to_sk_daddr = sctp_v6_to_sk_daddr, | |
1008 | .from_addr_param = sctp_v6_from_addr_param, | |
1009 | .to_addr_param = sctp_v6_to_addr_param, | |
1010 | .dst_saddr = sctp_v6_dst_saddr, | |
1011 | .cmp_addr = sctp_v6_cmp_addr, | |
1012 | .scope = sctp_v6_scope, | |
1013 | .addr_valid = sctp_v6_addr_valid, | |
1014 | .inaddr_any = sctp_v6_inaddr_any, | |
1015 | .is_any = sctp_v6_is_any, | |
1016 | .available = sctp_v6_available, | |
1017 | .skb_iif = sctp_v6_skb_iif, | |
1018 | .is_ce = sctp_v6_is_ce, | |
1019 | .seq_dump_addr = sctp_v6_seq_dump_addr, | |
b9031d9d | 1020 | .ecn_capable = sctp_v6_ecn_capable, |
543d9cfe ACM |
1021 | .net_header_len = sizeof(struct ipv6hdr), |
1022 | .sockaddr_len = sizeof(struct sockaddr_in6), | |
3fdadf7d | 1023 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
1024 | .compat_setsockopt = compat_ipv6_setsockopt, |
1025 | .compat_getsockopt = compat_ipv6_getsockopt, | |
3fdadf7d | 1026 | #endif |
1da177e4 LT |
1027 | }; |
1028 | ||
15efbe76 | 1029 | static struct sctp_pf sctp_pf_inet6 = { |
1da177e4 LT |
1030 | .event_msgname = sctp_inet6_event_msgname, |
1031 | .skb_msgname = sctp_inet6_skb_msgname, | |
1032 | .af_supported = sctp_inet6_af_supported, | |
1033 | .cmp_addr = sctp_inet6_cmp_addr, | |
1034 | .bind_verify = sctp_inet6_bind_verify, | |
1035 | .send_verify = sctp_inet6_send_verify, | |
1036 | .supported_addrs = sctp_inet6_supported_addrs, | |
1037 | .create_accept_sk = sctp_v6_create_accept_sk, | |
1038 | .addr_v4map = sctp_v6_addr_v4map, | |
15efbe76 | 1039 | .af = &sctp_af_inet6, |
1da177e4 LT |
1040 | }; |
1041 | ||
827bf122 | 1042 | /* Initialize IPv6 support and register with socket layer. */ |
270637ab | 1043 | void sctp_v6_pf_init(void) |
1da177e4 | 1044 | { |
827bf122 | 1045 | /* Register the SCTP specific PF_INET6 functions. */ |
15efbe76 | 1046 | sctp_register_pf(&sctp_pf_inet6, PF_INET6); |
827bf122 SS |
1047 | |
1048 | /* Register the SCTP specific AF_INET6 functions. */ | |
15efbe76 | 1049 | sctp_register_af(&sctp_af_inet6); |
270637ab VY |
1050 | } |
1051 | ||
1052 | void sctp_v6_pf_exit(void) | |
1053 | { | |
1054 | list_del(&sctp_af_inet6.list); | |
1055 | } | |
1056 | ||
1057 | /* Initialize IPv6 support and register with socket layer. */ | |
1058 | int sctp_v6_protosw_init(void) | |
1059 | { | |
1060 | int rc; | |
827bf122 SS |
1061 | |
1062 | rc = proto_register(&sctpv6_prot, 1); | |
1da177e4 | 1063 | if (rc) |
827bf122 | 1064 | return rc; |
1da177e4 LT |
1065 | |
1066 | /* Add SCTPv6(UDP and TCP style) to inetsw6 linked list. */ | |
1067 | inet6_register_protosw(&sctpv6_seqpacket_protosw); | |
1068 | inet6_register_protosw(&sctpv6_stream_protosw); | |
1069 | ||
827bf122 SS |
1070 | return 0; |
1071 | } | |
1da177e4 | 1072 | |
270637ab VY |
1073 | void sctp_v6_protosw_exit(void) |
1074 | { | |
1075 | inet6_unregister_protosw(&sctpv6_seqpacket_protosw); | |
1076 | inet6_unregister_protosw(&sctpv6_stream_protosw); | |
1077 | proto_unregister(&sctpv6_prot); | |
1078 | } | |
1079 | ||
1080 | ||
827bf122 SS |
1081 | /* Register with inet6 layer. */ |
1082 | int sctp_v6_add_protocol(void) | |
1083 | { | |
1da177e4 LT |
1084 | /* Register notifier for inet6 address additions/deletions. */ |
1085 | register_inet6addr_notifier(&sctp_inet6addr_notifier); | |
827bf122 SS |
1086 | |
1087 | if (inet6_add_protocol(&sctpv6_protocol, IPPROTO_SCTP) < 0) | |
1088 | return -EAGAIN; | |
1089 | ||
1090 | return 0; | |
1da177e4 LT |
1091 | } |
1092 | ||
827bf122 SS |
1093 | /* Unregister with inet6 layer. */ |
1094 | void sctp_v6_del_protocol(void) | |
1095 | { | |
1096 | inet6_del_protocol(&sctpv6_protocol, IPPROTO_SCTP); | |
1097 | unregister_inet6addr_notifier(&sctp_inet6addr_notifier); | |
1da177e4 | 1098 | } |