]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * PF_INET6 socket protocol family | |
3 | * Linux INET6 implementation | |
4 | * | |
5 | * Authors: | |
6 | * Pedro Roque <roque@di.fc.ul.pt> | |
7 | * | |
8 | * Adapted from linux/net/ipv4/af_inet.c | |
9 | * | |
10 | * $Id: af_inet6.c,v 1.66 2002/02/01 22:01:04 davem Exp $ | |
11 | * | |
12 | * Fixes: | |
13 | * piggy, Karl Knutson : Socket protocol table | |
14 | * Hideaki YOSHIFUJI : sin6_scope_id support | |
15 | * Arnaldo Melo : check proc_net_create return, cleanups | |
16 | * | |
17 | * This program is free software; you can redistribute it and/or | |
18 | * modify it under the terms of the GNU General Public License | |
19 | * as published by the Free Software Foundation; either version | |
20 | * 2 of the License, or (at your option) any later version. | |
21 | */ | |
22 | ||
23 | ||
24 | #include <linux/module.h> | |
4fc268d2 | 25 | #include <linux/capability.h> |
1da177e4 LT |
26 | #include <linux/errno.h> |
27 | #include <linux/types.h> | |
28 | #include <linux/socket.h> | |
29 | #include <linux/in.h> | |
30 | #include <linux/kernel.h> | |
1da177e4 LT |
31 | #include <linux/sched.h> |
32 | #include <linux/timer.h> | |
33 | #include <linux/string.h> | |
34 | #include <linux/sockios.h> | |
35 | #include <linux/net.h> | |
36 | #include <linux/fcntl.h> | |
37 | #include <linux/mm.h> | |
38 | #include <linux/interrupt.h> | |
39 | #include <linux/proc_fs.h> | |
40 | #include <linux/stat.h> | |
41 | #include <linux/init.h> | |
42 | ||
43 | #include <linux/inet.h> | |
44 | #include <linux/netdevice.h> | |
45 | #include <linux/icmpv6.h> | |
46 | #include <linux/smp_lock.h> | |
2cc7d573 | 47 | #include <linux/netfilter_ipv6.h> |
1da177e4 LT |
48 | |
49 | #include <net/ip.h> | |
50 | #include <net/ipv6.h> | |
51 | #include <net/udp.h> | |
ba4e58ec | 52 | #include <net/udplite.h> |
1da177e4 LT |
53 | #include <net/tcp.h> |
54 | #include <net/ipip.h> | |
55 | #include <net/protocol.h> | |
56 | #include <net/inet_common.h> | |
57 | #include <net/transp_v6.h> | |
58 | #include <net/ip6_route.h> | |
59 | #include <net/addrconf.h> | |
60 | #ifdef CONFIG_IPV6_TUNNEL | |
61 | #include <net/ip6_tunnel.h> | |
62 | #endif | |
2c8d7ca0 NT |
63 | #ifdef CONFIG_IPV6_MIP6 |
64 | #include <net/mip6.h> | |
65 | #endif | |
1da177e4 LT |
66 | |
67 | #include <asm/uaccess.h> | |
68 | #include <asm/system.h> | |
69 | ||
70 | MODULE_AUTHOR("Cast of dozens"); | |
71 | MODULE_DESCRIPTION("IPv6 protocol stack for Linux"); | |
72 | MODULE_LICENSE("GPL"); | |
73 | ||
ab32ea5d | 74 | int sysctl_ipv6_bindv6only __read_mostly; |
1da177e4 | 75 | |
1da177e4 LT |
76 | /* The inetsw table contains everything that inet_create needs to |
77 | * build a new socket. | |
78 | */ | |
79 | static struct list_head inetsw6[SOCK_MAX]; | |
80 | static DEFINE_SPINLOCK(inetsw6_lock); | |
81 | ||
1da177e4 LT |
82 | static __inline__ struct ipv6_pinfo *inet6_sk_generic(struct sock *sk) |
83 | { | |
84 | const int offset = sk->sk_prot->obj_size - sizeof(struct ipv6_pinfo); | |
85 | ||
86 | return (struct ipv6_pinfo *)(((u8 *)sk) + offset); | |
87 | } | |
88 | ||
89 | static int inet6_create(struct socket *sock, int protocol) | |
90 | { | |
91 | struct inet_sock *inet; | |
92 | struct ipv6_pinfo *np; | |
93 | struct sock *sk; | |
94 | struct list_head *p; | |
95 | struct inet_protosw *answer; | |
96 | struct proto *answer_prot; | |
97 | unsigned char answer_flags; | |
98 | char answer_no_check; | |
af1afe86 YH |
99 | int try_loading_module = 0; |
100 | int err; | |
1da177e4 LT |
101 | |
102 | /* Look for the requested type/protocol pair. */ | |
103 | answer = NULL; | |
af1afe86 YH |
104 | lookup_protocol: |
105 | err = -ESOCKTNOSUPPORT; | |
1da177e4 LT |
106 | rcu_read_lock(); |
107 | list_for_each_rcu(p, &inetsw6[sock->type]) { | |
108 | answer = list_entry(p, struct inet_protosw, list); | |
109 | ||
110 | /* Check the non-wild match. */ | |
111 | if (protocol == answer->protocol) { | |
112 | if (protocol != IPPROTO_IP) | |
113 | break; | |
114 | } else { | |
115 | /* Check for the two wild cases. */ | |
116 | if (IPPROTO_IP == protocol) { | |
117 | protocol = answer->protocol; | |
118 | break; | |
119 | } | |
120 | if (IPPROTO_IP == answer->protocol) | |
121 | break; | |
122 | } | |
af1afe86 | 123 | err = -EPROTONOSUPPORT; |
1da177e4 LT |
124 | answer = NULL; |
125 | } | |
126 | ||
af1afe86 YH |
127 | if (!answer) { |
128 | if (try_loading_module < 2) { | |
129 | rcu_read_unlock(); | |
130 | /* | |
131 | * Be more specific, e.g. net-pf-10-proto-132-type-1 | |
132 | * (net-pf-PF_INET6-proto-IPPROTO_SCTP-type-SOCK_STREAM) | |
133 | */ | |
134 | if (++try_loading_module == 1) | |
135 | request_module("net-pf-%d-proto-%d-type-%d", | |
136 | PF_INET6, protocol, sock->type); | |
137 | /* | |
138 | * Fall back to generic, e.g. net-pf-10-proto-132 | |
139 | * (net-pf-PF_INET6-proto-IPPROTO_SCTP) | |
140 | */ | |
141 | else | |
142 | request_module("net-pf-%d-proto-%d", | |
143 | PF_INET6, protocol); | |
144 | goto lookup_protocol; | |
145 | } else | |
146 | goto out_rcu_unlock; | |
147 | } | |
148 | ||
149 | err = -EPERM; | |
1da177e4 LT |
150 | if (answer->capability > 0 && !capable(answer->capability)) |
151 | goto out_rcu_unlock; | |
1da177e4 LT |
152 | |
153 | sock->ops = answer->ops; | |
1da177e4 LT |
154 | answer_prot = answer->prot; |
155 | answer_no_check = answer->no_check; | |
156 | answer_flags = answer->flags; | |
157 | rcu_read_unlock(); | |
158 | ||
159 | BUG_TRAP(answer_prot->slab != NULL); | |
160 | ||
af1afe86 | 161 | err = -ENOBUFS; |
1da177e4 LT |
162 | sk = sk_alloc(PF_INET6, GFP_KERNEL, answer_prot, 1); |
163 | if (sk == NULL) | |
164 | goto out; | |
165 | ||
166 | sock_init_data(sock, sk); | |
167 | ||
af1afe86 | 168 | err = 0; |
1da177e4 LT |
169 | sk->sk_no_check = answer_no_check; |
170 | if (INET_PROTOSW_REUSE & answer_flags) | |
171 | sk->sk_reuse = 1; | |
172 | ||
173 | inet = inet_sk(sk); | |
cbbd7d4f | 174 | inet->is_icsk = (INET_PROTOSW_ICSK & answer_flags) == INET_PROTOSW_ICSK; |
1da177e4 LT |
175 | |
176 | if (SOCK_RAW == sock->type) { | |
177 | inet->num = protocol; | |
178 | if (IPPROTO_RAW == protocol) | |
179 | inet->hdrincl = 1; | |
180 | } | |
181 | ||
e6848976 | 182 | sk->sk_destruct = inet_sock_destruct; |
1da177e4 LT |
183 | sk->sk_family = PF_INET6; |
184 | sk->sk_protocol = protocol; | |
185 | ||
186 | sk->sk_backlog_rcv = answer->prot->backlog_rcv; | |
187 | ||
188 | inet_sk(sk)->pinet6 = np = inet6_sk_generic(sk); | |
189 | np->hop_limit = -1; | |
190 | np->mcast_hops = -1; | |
191 | np->mc_loop = 1; | |
192 | np->pmtudisc = IPV6_PMTUDISC_WANT; | |
193 | np->ipv6only = sysctl_ipv6_bindv6only; | |
194 | ||
195 | /* Init the ipv4 part of the socket since we can have sockets | |
196 | * using v6 API for ipv4. | |
197 | */ | |
198 | inet->uc_ttl = -1; | |
199 | ||
200 | inet->mc_loop = 1; | |
201 | inet->mc_ttl = 1; | |
202 | inet->mc_index = 0; | |
203 | inet->mc_list = NULL; | |
204 | ||
205 | if (ipv4_config.no_pmtu_disc) | |
206 | inet->pmtudisc = IP_PMTUDISC_DONT; | |
207 | else | |
208 | inet->pmtudisc = IP_PMTUDISC_WANT; | |
e6848976 ACM |
209 | /* |
210 | * Increment only the relevant sk_prot->socks debug field, this changes | |
211 | * the previous behaviour of incrementing both the equivalent to | |
212 | * answer->prot->socks (inet6_sock_nr) and inet_sock_nr. | |
213 | * | |
214 | * This allows better debug granularity as we'll know exactly how many | |
215 | * UDPv6, TCPv6, etc socks were allocated, not the sum of all IPv6 | |
216 | * transport protocol socks. -acme | |
217 | */ | |
218 | sk_refcnt_debug_inc(sk); | |
1da177e4 | 219 | |
1da177e4 LT |
220 | if (inet->num) { |
221 | /* It assumes that any protocol which allows | |
222 | * the user to assign a number at socket | |
223 | * creation time automatically shares. | |
224 | */ | |
e69a4adc | 225 | inet->sport = htons(inet->num); |
1da177e4 LT |
226 | sk->sk_prot->hash(sk); |
227 | } | |
228 | if (sk->sk_prot->init) { | |
af1afe86 YH |
229 | err = sk->sk_prot->init(sk); |
230 | if (err) { | |
1da177e4 LT |
231 | sk_common_release(sk); |
232 | goto out; | |
233 | } | |
234 | } | |
235 | out: | |
af1afe86 | 236 | return err; |
1da177e4 LT |
237 | out_rcu_unlock: |
238 | rcu_read_unlock(); | |
239 | goto out; | |
240 | } | |
241 | ||
242 | ||
243 | /* bind for INET6 API */ | |
244 | int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) | |
245 | { | |
246 | struct sockaddr_in6 *addr=(struct sockaddr_in6 *)uaddr; | |
247 | struct sock *sk = sock->sk; | |
248 | struct inet_sock *inet = inet_sk(sk); | |
249 | struct ipv6_pinfo *np = inet6_sk(sk); | |
fd683222 | 250 | __be32 v4addr = 0; |
1da177e4 LT |
251 | unsigned short snum; |
252 | int addr_type = 0; | |
253 | int err = 0; | |
254 | ||
255 | /* If the socket has its own bind function then use it. */ | |
256 | if (sk->sk_prot->bind) | |
257 | return sk->sk_prot->bind(sk, uaddr, addr_len); | |
258 | ||
259 | if (addr_len < SIN6_LEN_RFC2133) | |
260 | return -EINVAL; | |
261 | addr_type = ipv6_addr_type(&addr->sin6_addr); | |
262 | if ((addr_type & IPV6_ADDR_MULTICAST) && sock->type == SOCK_STREAM) | |
263 | return -EINVAL; | |
264 | ||
265 | snum = ntohs(addr->sin6_port); | |
266 | if (snum && snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE)) | |
267 | return -EACCES; | |
268 | ||
269 | lock_sock(sk); | |
270 | ||
271 | /* Check these errors (active socket, double bind). */ | |
272 | if (sk->sk_state != TCP_CLOSE || inet->num) { | |
273 | err = -EINVAL; | |
274 | goto out; | |
275 | } | |
276 | ||
277 | /* Check if the address belongs to the host. */ | |
278 | if (addr_type == IPV6_ADDR_MAPPED) { | |
279 | v4addr = addr->sin6_addr.s6_addr32[3]; | |
280 | if (inet_addr_type(v4addr) != RTN_LOCAL) { | |
281 | err = -EADDRNOTAVAIL; | |
282 | goto out; | |
283 | } | |
284 | } else { | |
285 | if (addr_type != IPV6_ADDR_ANY) { | |
286 | struct net_device *dev = NULL; | |
287 | ||
288 | if (addr_type & IPV6_ADDR_LINKLOCAL) { | |
289 | if (addr_len >= sizeof(struct sockaddr_in6) && | |
290 | addr->sin6_scope_id) { | |
291 | /* Override any existing binding, if another one | |
292 | * is supplied by user. | |
293 | */ | |
294 | sk->sk_bound_dev_if = addr->sin6_scope_id; | |
295 | } | |
296 | ||
297 | /* Binding to link-local address requires an interface */ | |
298 | if (!sk->sk_bound_dev_if) { | |
299 | err = -EINVAL; | |
300 | goto out; | |
301 | } | |
302 | dev = dev_get_by_index(sk->sk_bound_dev_if); | |
303 | if (!dev) { | |
304 | err = -ENODEV; | |
305 | goto out; | |
306 | } | |
307 | } | |
308 | ||
309 | /* ipv4 addr of the socket is invalid. Only the | |
310 | * unspecified and mapped address have a v4 equivalent. | |
311 | */ | |
312 | v4addr = LOOPBACK4_IPV6; | |
313 | if (!(addr_type & IPV6_ADDR_MULTICAST)) { | |
314 | if (!ipv6_chk_addr(&addr->sin6_addr, dev, 0)) { | |
315 | if (dev) | |
316 | dev_put(dev); | |
317 | err = -EADDRNOTAVAIL; | |
318 | goto out; | |
319 | } | |
320 | } | |
321 | if (dev) | |
322 | dev_put(dev); | |
323 | } | |
324 | } | |
325 | ||
326 | inet->rcv_saddr = v4addr; | |
327 | inet->saddr = v4addr; | |
328 | ||
329 | ipv6_addr_copy(&np->rcv_saddr, &addr->sin6_addr); | |
330 | ||
331 | if (!(addr_type & IPV6_ADDR_MULTICAST)) | |
332 | ipv6_addr_copy(&np->saddr, &addr->sin6_addr); | |
333 | ||
334 | /* Make sure we are allowed to bind here. */ | |
335 | if (sk->sk_prot->get_port(sk, snum)) { | |
336 | inet_reset_saddr(sk); | |
337 | err = -EADDRINUSE; | |
338 | goto out; | |
339 | } | |
340 | ||
341 | if (addr_type != IPV6_ADDR_ANY) | |
342 | sk->sk_userlocks |= SOCK_BINDADDR_LOCK; | |
343 | if (snum) | |
344 | sk->sk_userlocks |= SOCK_BINDPORT_LOCK; | |
e69a4adc | 345 | inet->sport = htons(inet->num); |
1da177e4 LT |
346 | inet->dport = 0; |
347 | inet->daddr = 0; | |
348 | out: | |
349 | release_sock(sk); | |
350 | return err; | |
351 | } | |
352 | ||
353 | int inet6_release(struct socket *sock) | |
354 | { | |
355 | struct sock *sk = sock->sk; | |
356 | ||
357 | if (sk == NULL) | |
358 | return -EINVAL; | |
359 | ||
360 | /* Free mc lists */ | |
361 | ipv6_sock_mc_close(sk); | |
362 | ||
363 | /* Free ac lists */ | |
364 | ipv6_sock_ac_close(sk); | |
365 | ||
366 | return inet_release(sock); | |
367 | } | |
368 | ||
369 | int inet6_destroy_sock(struct sock *sk) | |
370 | { | |
371 | struct ipv6_pinfo *np = inet6_sk(sk); | |
372 | struct sk_buff *skb; | |
373 | struct ipv6_txoptions *opt; | |
374 | ||
1da177e4 LT |
375 | /* Release rx options */ |
376 | ||
377 | if ((skb = xchg(&np->pktoptions, NULL)) != NULL) | |
378 | kfree_skb(skb); | |
379 | ||
380 | /* Free flowlabels */ | |
381 | fl6_free_socklist(sk); | |
382 | ||
383 | /* Free tx options */ | |
384 | ||
385 | if ((opt = xchg(&np->opt, NULL)) != NULL) | |
386 | sock_kfree_s(sk, opt, opt->tot_len); | |
387 | ||
388 | return 0; | |
389 | } | |
390 | ||
3cf3dc6c ACM |
391 | EXPORT_SYMBOL_GPL(inet6_destroy_sock); |
392 | ||
1da177e4 LT |
393 | /* |
394 | * This does both peername and sockname. | |
395 | */ | |
396 | ||
397 | int inet6_getname(struct socket *sock, struct sockaddr *uaddr, | |
398 | int *uaddr_len, int peer) | |
399 | { | |
400 | struct sockaddr_in6 *sin=(struct sockaddr_in6 *)uaddr; | |
401 | struct sock *sk = sock->sk; | |
402 | struct inet_sock *inet = inet_sk(sk); | |
403 | struct ipv6_pinfo *np = inet6_sk(sk); | |
404 | ||
405 | sin->sin6_family = AF_INET6; | |
406 | sin->sin6_flowinfo = 0; | |
407 | sin->sin6_scope_id = 0; | |
408 | if (peer) { | |
409 | if (!inet->dport) | |
410 | return -ENOTCONN; | |
411 | if (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) && | |
412 | peer == 1) | |
413 | return -ENOTCONN; | |
414 | sin->sin6_port = inet->dport; | |
415 | ipv6_addr_copy(&sin->sin6_addr, &np->daddr); | |
416 | if (np->sndflow) | |
417 | sin->sin6_flowinfo = np->flow_label; | |
418 | } else { | |
419 | if (ipv6_addr_any(&np->rcv_saddr)) | |
420 | ipv6_addr_copy(&sin->sin6_addr, &np->saddr); | |
421 | else | |
422 | ipv6_addr_copy(&sin->sin6_addr, &np->rcv_saddr); | |
423 | ||
424 | sin->sin6_port = inet->sport; | |
425 | } | |
426 | if (ipv6_addr_type(&sin->sin6_addr) & IPV6_ADDR_LINKLOCAL) | |
427 | sin->sin6_scope_id = sk->sk_bound_dev_if; | |
428 | *uaddr_len = sizeof(*sin); | |
429 | return(0); | |
430 | } | |
431 | ||
432 | int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) | |
433 | { | |
434 | struct sock *sk = sock->sk; | |
1da177e4 LT |
435 | |
436 | switch(cmd) | |
437 | { | |
438 | case SIOCGSTAMP: | |
439 | return sock_get_timestamp(sk, (struct timeval __user *)arg); | |
440 | ||
441 | case SIOCADDRT: | |
442 | case SIOCDELRT: | |
443 | ||
444 | return(ipv6_route_ioctl(cmd,(void __user *)arg)); | |
445 | ||
446 | case SIOCSIFADDR: | |
447 | return addrconf_add_ifaddr((void __user *) arg); | |
448 | case SIOCDIFADDR: | |
449 | return addrconf_del_ifaddr((void __user *) arg); | |
450 | case SIOCSIFDSTADDR: | |
451 | return addrconf_set_dstaddr((void __user *) arg); | |
452 | default: | |
b5e5fa5e CH |
453 | if (!sk->sk_prot->ioctl) |
454 | return -ENOIOCTLCMD; | |
455 | return sk->sk_prot->ioctl(sk, cmd, arg); | |
1da177e4 LT |
456 | } |
457 | /*NOTREACHED*/ | |
458 | return(0); | |
459 | } | |
460 | ||
90ddc4f0 | 461 | const struct proto_ops inet6_stream_ops = { |
543d9cfe ACM |
462 | .family = PF_INET6, |
463 | .owner = THIS_MODULE, | |
464 | .release = inet6_release, | |
465 | .bind = inet6_bind, | |
466 | .connect = inet_stream_connect, /* ok */ | |
467 | .socketpair = sock_no_socketpair, /* a do nothing */ | |
468 | .accept = inet_accept, /* ok */ | |
469 | .getname = inet6_getname, | |
470 | .poll = tcp_poll, /* ok */ | |
471 | .ioctl = inet6_ioctl, /* must change */ | |
472 | .listen = inet_listen, /* ok */ | |
473 | .shutdown = inet_shutdown, /* ok */ | |
474 | .setsockopt = sock_common_setsockopt, /* ok */ | |
475 | .getsockopt = sock_common_getsockopt, /* ok */ | |
476 | .sendmsg = inet_sendmsg, /* ok */ | |
477 | .recvmsg = sock_common_recvmsg, /* ok */ | |
478 | .mmap = sock_no_mmap, | |
479 | .sendpage = tcp_sendpage, | |
3fdadf7d | 480 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
481 | .compat_setsockopt = compat_sock_common_setsockopt, |
482 | .compat_getsockopt = compat_sock_common_getsockopt, | |
3fdadf7d | 483 | #endif |
1da177e4 LT |
484 | }; |
485 | ||
90ddc4f0 | 486 | const struct proto_ops inet6_dgram_ops = { |
543d9cfe ACM |
487 | .family = PF_INET6, |
488 | .owner = THIS_MODULE, | |
489 | .release = inet6_release, | |
490 | .bind = inet6_bind, | |
491 | .connect = inet_dgram_connect, /* ok */ | |
492 | .socketpair = sock_no_socketpair, /* a do nothing */ | |
493 | .accept = sock_no_accept, /* a do nothing */ | |
494 | .getname = inet6_getname, | |
495 | .poll = udp_poll, /* ok */ | |
496 | .ioctl = inet6_ioctl, /* must change */ | |
497 | .listen = sock_no_listen, /* ok */ | |
498 | .shutdown = inet_shutdown, /* ok */ | |
499 | .setsockopt = sock_common_setsockopt, /* ok */ | |
500 | .getsockopt = sock_common_getsockopt, /* ok */ | |
501 | .sendmsg = inet_sendmsg, /* ok */ | |
502 | .recvmsg = sock_common_recvmsg, /* ok */ | |
503 | .mmap = sock_no_mmap, | |
504 | .sendpage = sock_no_sendpage, | |
3fdadf7d | 505 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
506 | .compat_setsockopt = compat_sock_common_setsockopt, |
507 | .compat_getsockopt = compat_sock_common_getsockopt, | |
3fdadf7d | 508 | #endif |
1da177e4 LT |
509 | }; |
510 | ||
511 | static struct net_proto_family inet6_family_ops = { | |
512 | .family = PF_INET6, | |
513 | .create = inet6_create, | |
514 | .owner = THIS_MODULE, | |
515 | }; | |
516 | ||
1da177e4 | 517 | /* Same as inet6_dgram_ops, sans udp_poll. */ |
90ddc4f0 | 518 | static const struct proto_ops inet6_sockraw_ops = { |
543d9cfe ACM |
519 | .family = PF_INET6, |
520 | .owner = THIS_MODULE, | |
521 | .release = inet6_release, | |
522 | .bind = inet6_bind, | |
523 | .connect = inet_dgram_connect, /* ok */ | |
524 | .socketpair = sock_no_socketpair, /* a do nothing */ | |
525 | .accept = sock_no_accept, /* a do nothing */ | |
526 | .getname = inet6_getname, | |
527 | .poll = datagram_poll, /* ok */ | |
528 | .ioctl = inet6_ioctl, /* must change */ | |
529 | .listen = sock_no_listen, /* ok */ | |
530 | .shutdown = inet_shutdown, /* ok */ | |
531 | .setsockopt = sock_common_setsockopt, /* ok */ | |
532 | .getsockopt = sock_common_getsockopt, /* ok */ | |
533 | .sendmsg = inet_sendmsg, /* ok */ | |
534 | .recvmsg = sock_common_recvmsg, /* ok */ | |
535 | .mmap = sock_no_mmap, | |
536 | .sendpage = sock_no_sendpage, | |
3fdadf7d | 537 | #ifdef CONFIG_COMPAT |
543d9cfe ACM |
538 | .compat_setsockopt = compat_sock_common_setsockopt, |
539 | .compat_getsockopt = compat_sock_common_getsockopt, | |
3fdadf7d | 540 | #endif |
1da177e4 LT |
541 | }; |
542 | ||
543 | static struct inet_protosw rawv6_protosw = { | |
544 | .type = SOCK_RAW, | |
545 | .protocol = IPPROTO_IP, /* wild card */ | |
546 | .prot = &rawv6_prot, | |
547 | .ops = &inet6_sockraw_ops, | |
548 | .capability = CAP_NET_RAW, | |
549 | .no_check = UDP_CSUM_DEFAULT, | |
550 | .flags = INET_PROTOSW_REUSE, | |
551 | }; | |
552 | ||
553 | void | |
554 | inet6_register_protosw(struct inet_protosw *p) | |
555 | { | |
556 | struct list_head *lh; | |
557 | struct inet_protosw *answer; | |
558 | int protocol = p->protocol; | |
559 | struct list_head *last_perm; | |
560 | ||
561 | spin_lock_bh(&inetsw6_lock); | |
562 | ||
563 | if (p->type >= SOCK_MAX) | |
564 | goto out_illegal; | |
565 | ||
566 | /* If we are trying to override a permanent protocol, bail. */ | |
567 | answer = NULL; | |
568 | last_perm = &inetsw6[p->type]; | |
569 | list_for_each(lh, &inetsw6[p->type]) { | |
570 | answer = list_entry(lh, struct inet_protosw, list); | |
571 | ||
572 | /* Check only the non-wild match. */ | |
573 | if (INET_PROTOSW_PERMANENT & answer->flags) { | |
574 | if (protocol == answer->protocol) | |
575 | break; | |
576 | last_perm = lh; | |
577 | } | |
578 | ||
579 | answer = NULL; | |
580 | } | |
581 | if (answer) | |
582 | goto out_permanent; | |
583 | ||
584 | /* Add the new entry after the last permanent entry if any, so that | |
585 | * the new entry does not override a permanent entry when matched with | |
586 | * a wild-card protocol. But it is allowed to override any existing | |
587 | * non-permanent entry. This means that when we remove this entry, the | |
588 | * system automatically returns to the old behavior. | |
589 | */ | |
590 | list_add_rcu(&p->list, last_perm); | |
591 | out: | |
592 | spin_unlock_bh(&inetsw6_lock); | |
593 | return; | |
594 | ||
595 | out_permanent: | |
596 | printk(KERN_ERR "Attempt to override permanent protocol %d.\n", | |
597 | protocol); | |
598 | goto out; | |
599 | ||
600 | out_illegal: | |
601 | printk(KERN_ERR | |
602 | "Ignoring attempt to register invalid socket type %d.\n", | |
603 | p->type); | |
604 | goto out; | |
605 | } | |
606 | ||
607 | void | |
608 | inet6_unregister_protosw(struct inet_protosw *p) | |
609 | { | |
610 | if (INET_PROTOSW_PERMANENT & p->flags) { | |
611 | printk(KERN_ERR | |
612 | "Attempt to unregister permanent protocol %d.\n", | |
613 | p->protocol); | |
614 | } else { | |
615 | spin_lock_bh(&inetsw6_lock); | |
616 | list_del_rcu(&p->list); | |
617 | spin_unlock_bh(&inetsw6_lock); | |
618 | ||
619 | synchronize_net(); | |
620 | } | |
621 | } | |
622 | ||
b9750ce1 ACM |
623 | int inet6_sk_rebuild_header(struct sock *sk) |
624 | { | |
625 | int err; | |
626 | struct dst_entry *dst; | |
627 | struct ipv6_pinfo *np = inet6_sk(sk); | |
628 | ||
629 | dst = __sk_dst_check(sk, np->dst_cookie); | |
630 | ||
631 | if (dst == NULL) { | |
632 | struct inet_sock *inet = inet_sk(sk); | |
633 | struct in6_addr *final_p = NULL, final; | |
634 | struct flowi fl; | |
635 | ||
636 | memset(&fl, 0, sizeof(fl)); | |
637 | fl.proto = sk->sk_protocol; | |
638 | ipv6_addr_copy(&fl.fl6_dst, &np->daddr); | |
639 | ipv6_addr_copy(&fl.fl6_src, &np->saddr); | |
640 | fl.fl6_flowlabel = np->flow_label; | |
641 | fl.oif = sk->sk_bound_dev_if; | |
642 | fl.fl_ip_dport = inet->dport; | |
643 | fl.fl_ip_sport = inet->sport; | |
beb8d13b | 644 | security_sk_classify_flow(sk, &fl); |
b9750ce1 ACM |
645 | |
646 | if (np->opt && np->opt->srcrt) { | |
647 | struct rt0_hdr *rt0 = (struct rt0_hdr *) np->opt->srcrt; | |
648 | ipv6_addr_copy(&final, &fl.fl6_dst); | |
649 | ipv6_addr_copy(&fl.fl6_dst, rt0->addr); | |
650 | final_p = &final; | |
651 | } | |
652 | ||
653 | err = ip6_dst_lookup(sk, &dst, &fl); | |
654 | if (err) { | |
655 | sk->sk_route_caps = 0; | |
656 | return err; | |
657 | } | |
658 | if (final_p) | |
659 | ipv6_addr_copy(&fl.fl6_dst, final_p); | |
660 | ||
661 | if ((err = xfrm_lookup(&dst, &fl, sk, 0)) < 0) { | |
662 | sk->sk_err_soft = -err; | |
663 | return err; | |
664 | } | |
665 | ||
8e1ef0a9 | 666 | __ip6_dst_store(sk, dst, NULL, NULL); |
b9750ce1 ACM |
667 | } |
668 | ||
669 | return 0; | |
670 | } | |
671 | ||
672 | EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header); | |
673 | ||
399c07de ACM |
674 | int ipv6_opt_accepted(struct sock *sk, struct sk_buff *skb) |
675 | { | |
676 | struct ipv6_pinfo *np = inet6_sk(sk); | |
677 | struct inet6_skb_parm *opt = IP6CB(skb); | |
678 | ||
679 | if (np->rxopt.all) { | |
680 | if ((opt->hop && (np->rxopt.bits.hopopts || | |
681 | np->rxopt.bits.ohopopts)) || | |
90bcaf7b | 682 | ((IPV6_FLOWINFO_MASK & *(__be32*)skb->nh.raw) && |
399c07de ACM |
683 | np->rxopt.bits.rxflow) || |
684 | (opt->srcrt && (np->rxopt.bits.srcrt || | |
685 | np->rxopt.bits.osrcrt)) || | |
686 | ((opt->dst1 || opt->dst0) && | |
687 | (np->rxopt.bits.dstopts || np->rxopt.bits.odstopts))) | |
688 | return 1; | |
689 | } | |
690 | return 0; | |
691 | } | |
692 | ||
693 | EXPORT_SYMBOL_GPL(ipv6_opt_accepted); | |
694 | ||
1da177e4 LT |
695 | int |
696 | snmp6_mib_init(void *ptr[2], size_t mibsize, size_t mibalign) | |
697 | { | |
698 | if (ptr == NULL) | |
699 | return -EINVAL; | |
700 | ||
f9f75005 | 701 | ptr[0] = __alloc_percpu(mibsize); |
1da177e4 LT |
702 | if (!ptr[0]) |
703 | goto err0; | |
704 | ||
f9f75005 | 705 | ptr[1] = __alloc_percpu(mibsize); |
1da177e4 LT |
706 | if (!ptr[1]) |
707 | goto err1; | |
708 | ||
709 | return 0; | |
710 | ||
711 | err1: | |
712 | free_percpu(ptr[0]); | |
713 | ptr[0] = NULL; | |
714 | err0: | |
715 | return -ENOMEM; | |
716 | } | |
717 | ||
718 | void | |
719 | snmp6_mib_free(void *ptr[2]) | |
720 | { | |
721 | if (ptr == NULL) | |
722 | return; | |
a1205868 AS |
723 | free_percpu(ptr[0]); |
724 | free_percpu(ptr[1]); | |
1da177e4 LT |
725 | ptr[0] = ptr[1] = NULL; |
726 | } | |
727 | ||
728 | static int __init init_ipv6_mibs(void) | |
729 | { | |
730 | if (snmp6_mib_init((void **)ipv6_statistics, sizeof (struct ipstats_mib), | |
731 | __alignof__(struct ipstats_mib)) < 0) | |
732 | goto err_ip_mib; | |
733 | if (snmp6_mib_init((void **)icmpv6_statistics, sizeof (struct icmpv6_mib), | |
734 | __alignof__(struct icmpv6_mib)) < 0) | |
735 | goto err_icmp_mib; | |
736 | if (snmp6_mib_init((void **)udp_stats_in6, sizeof (struct udp_mib), | |
737 | __alignof__(struct udp_mib)) < 0) | |
738 | goto err_udp_mib; | |
ba4e58ec GR |
739 | if (snmp6_mib_init((void **)udplite_stats_in6, sizeof (struct udp_mib), |
740 | __alignof__(struct udp_mib)) < 0) | |
741 | goto err_udplite_mib; | |
1da177e4 LT |
742 | return 0; |
743 | ||
ba4e58ec GR |
744 | err_udplite_mib: |
745 | snmp6_mib_free((void **)udp_stats_in6); | |
1da177e4 LT |
746 | err_udp_mib: |
747 | snmp6_mib_free((void **)icmpv6_statistics); | |
748 | err_icmp_mib: | |
749 | snmp6_mib_free((void **)ipv6_statistics); | |
750 | err_ip_mib: | |
751 | return -ENOMEM; | |
752 | ||
753 | } | |
754 | ||
755 | static void cleanup_ipv6_mibs(void) | |
756 | { | |
757 | snmp6_mib_free((void **)ipv6_statistics); | |
758 | snmp6_mib_free((void **)icmpv6_statistics); | |
759 | snmp6_mib_free((void **)udp_stats_in6); | |
ba4e58ec | 760 | snmp6_mib_free((void **)udplite_stats_in6); |
1da177e4 LT |
761 | } |
762 | ||
1da177e4 LT |
763 | static int __init inet6_init(void) |
764 | { | |
765 | struct sk_buff *dummy_skb; | |
766 | struct list_head *r; | |
767 | int err; | |
768 | ||
ef047f5e YH |
769 | BUILD_BUG_ON(sizeof(struct inet6_skb_parm) > sizeof(dummy_skb->cb)); |
770 | ||
1da177e4 LT |
771 | #ifdef MODULE |
772 | #if 0 /* FIXME --RR */ | |
773 | if (!mod_member_present(&__this_module, can_unload)) | |
774 | return -EINVAL; | |
775 | ||
776 | __this_module.can_unload = &ipv6_unload; | |
777 | #endif | |
778 | #endif | |
779 | ||
1da177e4 LT |
780 | err = proto_register(&tcpv6_prot, 1); |
781 | if (err) | |
782 | goto out; | |
783 | ||
784 | err = proto_register(&udpv6_prot, 1); | |
785 | if (err) | |
786 | goto out_unregister_tcp_proto; | |
787 | ||
ba4e58ec | 788 | err = proto_register(&udplitev6_prot, 1); |
1da177e4 LT |
789 | if (err) |
790 | goto out_unregister_udp_proto; | |
791 | ||
ba4e58ec GR |
792 | err = proto_register(&rawv6_prot, 1); |
793 | if (err) | |
794 | goto out_unregister_udplite_proto; | |
795 | ||
1da177e4 LT |
796 | |
797 | /* Register the socket-side information for inet6_create. */ | |
798 | for(r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r) | |
799 | INIT_LIST_HEAD(r); | |
800 | ||
801 | /* We MUST register RAW sockets before we create the ICMP6, | |
802 | * IGMP6, or NDISC control sockets. | |
803 | */ | |
804 | inet6_register_protosw(&rawv6_protosw); | |
805 | ||
806 | /* Register the family here so that the init calls below will | |
807 | * be able to create sockets. (?? is this dangerous ??) | |
808 | */ | |
8eb55910 DM |
809 | err = sock_register(&inet6_family_ops); |
810 | if (err) | |
811 | goto out_unregister_raw_proto; | |
1da177e4 LT |
812 | |
813 | /* Initialise ipv6 mibs */ | |
814 | err = init_ipv6_mibs(); | |
815 | if (err) | |
8eb55910 | 816 | goto out_unregister_sock; |
1da177e4 LT |
817 | |
818 | /* | |
819 | * ipngwg API draft makes clear that the correct semantics | |
820 | * for TCP and UDP is to consider one TCP and UDP instance | |
821 | * in a host availiable by both INET and INET6 APIs and | |
822 | * able to communicate via both network protocols. | |
823 | */ | |
824 | ||
825 | #ifdef CONFIG_SYSCTL | |
826 | ipv6_sysctl_register(); | |
827 | #endif | |
828 | err = icmpv6_init(&inet6_family_ops); | |
829 | if (err) | |
830 | goto icmp_fail; | |
831 | err = ndisc_init(&inet6_family_ops); | |
832 | if (err) | |
833 | goto ndisc_fail; | |
834 | err = igmp6_init(&inet6_family_ops); | |
835 | if (err) | |
836 | goto igmp_fail; | |
2cc7d573 HW |
837 | err = ipv6_netfilter_init(); |
838 | if (err) | |
839 | goto netfilter_fail; | |
1da177e4 LT |
840 | /* Create /proc/foo6 entries. */ |
841 | #ifdef CONFIG_PROC_FS | |
842 | err = -ENOMEM; | |
843 | if (raw6_proc_init()) | |
844 | goto proc_raw6_fail; | |
845 | if (tcp6_proc_init()) | |
846 | goto proc_tcp6_fail; | |
847 | if (udp6_proc_init()) | |
848 | goto proc_udp6_fail; | |
ba4e58ec GR |
849 | if (udplite6_proc_init()) |
850 | goto proc_udplite6_fail; | |
1da177e4 LT |
851 | if (ipv6_misc_proc_init()) |
852 | goto proc_misc6_fail; | |
853 | ||
854 | if (ac6_proc_init()) | |
855 | goto proc_anycast6_fail; | |
856 | if (if6_proc_init()) | |
857 | goto proc_if6_fail; | |
858 | #endif | |
1da177e4 LT |
859 | ip6_route_init(); |
860 | ip6_flowlabel_init(); | |
861 | err = addrconf_init(); | |
862 | if (err) | |
863 | goto addrconf_fail; | |
1da177e4 LT |
864 | |
865 | /* Init v6 extension headers. */ | |
866 | ipv6_rthdr_init(); | |
867 | ipv6_frag_init(); | |
868 | ipv6_nodata_init(); | |
869 | ipv6_destopt_init(); | |
2c8d7ca0 NT |
870 | #ifdef CONFIG_IPV6_MIP6 |
871 | mip6_init(); | |
872 | #endif | |
1da177e4 LT |
873 | |
874 | /* Init v6 transport protocols. */ | |
875 | udpv6_init(); | |
ba4e58ec | 876 | udplitev6_init(); |
1da177e4 | 877 | tcpv6_init(); |
e2ed4052 HX |
878 | |
879 | ipv6_packet_init(); | |
1da177e4 LT |
880 | err = 0; |
881 | out: | |
882 | return err; | |
883 | ||
884 | addrconf_fail: | |
885 | ip6_flowlabel_cleanup(); | |
886 | ip6_route_cleanup(); | |
1da177e4 LT |
887 | #ifdef CONFIG_PROC_FS |
888 | if6_proc_exit(); | |
889 | proc_if6_fail: | |
890 | ac6_proc_exit(); | |
891 | proc_anycast6_fail: | |
892 | ipv6_misc_proc_exit(); | |
893 | proc_misc6_fail: | |
ba4e58ec GR |
894 | udplite6_proc_exit(); |
895 | proc_udplite6_fail: | |
1da177e4 LT |
896 | udp6_proc_exit(); |
897 | proc_udp6_fail: | |
898 | tcp6_proc_exit(); | |
899 | proc_tcp6_fail: | |
900 | raw6_proc_exit(); | |
901 | proc_raw6_fail: | |
902 | #endif | |
2cc7d573 HW |
903 | ipv6_netfilter_fini(); |
904 | netfilter_fail: | |
1da177e4 LT |
905 | igmp6_cleanup(); |
906 | igmp_fail: | |
907 | ndisc_cleanup(); | |
908 | ndisc_fail: | |
909 | icmpv6_cleanup(); | |
910 | icmp_fail: | |
911 | #ifdef CONFIG_SYSCTL | |
912 | ipv6_sysctl_unregister(); | |
913 | #endif | |
914 | cleanup_ipv6_mibs(); | |
8eb55910 DM |
915 | out_unregister_sock: |
916 | sock_unregister(PF_INET6); | |
1da177e4 LT |
917 | out_unregister_raw_proto: |
918 | proto_unregister(&rawv6_prot); | |
ba4e58ec GR |
919 | out_unregister_udplite_proto: |
920 | proto_unregister(&udplitev6_prot); | |
1da177e4 LT |
921 | out_unregister_udp_proto: |
922 | proto_unregister(&udpv6_prot); | |
923 | out_unregister_tcp_proto: | |
924 | proto_unregister(&tcpv6_prot); | |
925 | goto out; | |
926 | } | |
927 | module_init(inet6_init); | |
928 | ||
929 | static void __exit inet6_exit(void) | |
930 | { | |
931 | /* First of all disallow new sockets creation. */ | |
932 | sock_unregister(PF_INET6); | |
933 | #ifdef CONFIG_PROC_FS | |
934 | if6_proc_exit(); | |
935 | ac6_proc_exit(); | |
936 | ipv6_misc_proc_exit(); | |
937 | udp6_proc_exit(); | |
ba4e58ec | 938 | udplite6_proc_exit(); |
1da177e4 LT |
939 | tcp6_proc_exit(); |
940 | raw6_proc_exit(); | |
2c8d7ca0 NT |
941 | #endif |
942 | #ifdef CONFIG_IPV6_MIP6 | |
943 | mip6_fini(); | |
1da177e4 LT |
944 | #endif |
945 | /* Cleanup code parts. */ | |
1da177e4 LT |
946 | ip6_flowlabel_cleanup(); |
947 | addrconf_cleanup(); | |
948 | ip6_route_cleanup(); | |
949 | ipv6_packet_cleanup(); | |
950 | igmp6_cleanup(); | |
2cc7d573 | 951 | ipv6_netfilter_fini(); |
1da177e4 LT |
952 | ndisc_cleanup(); |
953 | icmpv6_cleanup(); | |
954 | #ifdef CONFIG_SYSCTL | |
955 | ipv6_sysctl_unregister(); | |
956 | #endif | |
957 | cleanup_ipv6_mibs(); | |
958 | proto_unregister(&rawv6_prot); | |
959 | proto_unregister(&udpv6_prot); | |
960 | proto_unregister(&tcpv6_prot); | |
961 | } | |
962 | module_exit(inet6_exit); | |
963 | ||
964 | MODULE_ALIAS_NETPROTO(PF_INET6); |