Root/
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 | * Fixes: |
11 | * piggy, Karl Knutson : Socket protocol table |
12 | * Hideaki YOSHIFUJI : sin6_scope_id support |
13 | * Arnaldo Melo : check proc_net_create return, cleanups |
14 | * |
15 | * This program is free software; you can redistribute it and/or |
16 | * modify it under the terms of the GNU General Public License |
17 | * as published by the Free Software Foundation; either version |
18 | * 2 of the License, or (at your option) any later version. |
19 | */ |
20 | |
21 | |
22 | #include <linux/module.h> |
23 | #include <linux/capability.h> |
24 | #include <linux/errno.h> |
25 | #include <linux/types.h> |
26 | #include <linux/socket.h> |
27 | #include <linux/in.h> |
28 | #include <linux/kernel.h> |
29 | #include <linux/timer.h> |
30 | #include <linux/string.h> |
31 | #include <linux/sockios.h> |
32 | #include <linux/net.h> |
33 | #include <linux/fcntl.h> |
34 | #include <linux/mm.h> |
35 | #include <linux/interrupt.h> |
36 | #include <linux/proc_fs.h> |
37 | #include <linux/stat.h> |
38 | #include <linux/init.h> |
39 | #include <linux/slab.h> |
40 | |
41 | #include <linux/inet.h> |
42 | #include <linux/netdevice.h> |
43 | #include <linux/icmpv6.h> |
44 | #include <linux/netfilter_ipv6.h> |
45 | |
46 | #include <net/ip.h> |
47 | #include <net/ipv6.h> |
48 | #include <net/udp.h> |
49 | #include <net/udplite.h> |
50 | #include <net/tcp.h> |
51 | #include <net/ipip.h> |
52 | #include <net/protocol.h> |
53 | #include <net/inet_common.h> |
54 | #include <net/route.h> |
55 | #include <net/transp_v6.h> |
56 | #include <net/ip6_route.h> |
57 | #include <net/addrconf.h> |
58 | #ifdef CONFIG_IPV6_TUNNEL |
59 | #include <net/ip6_tunnel.h> |
60 | #endif |
61 | |
62 | #include <asm/uaccess.h> |
63 | #include <asm/system.h> |
64 | #include <linux/mroute6.h> |
65 | |
66 | MODULE_AUTHOR("Cast of dozens"); |
67 | MODULE_DESCRIPTION("IPv6 protocol stack for Linux"); |
68 | MODULE_LICENSE("GPL"); |
69 | |
70 | /* The inetsw6 table contains everything that inet6_create needs to |
71 | * build a new socket. |
72 | */ |
73 | static struct list_head inetsw6[SOCK_MAX]; |
74 | static DEFINE_SPINLOCK(inetsw6_lock); |
75 | |
76 | struct ipv6_params ipv6_defaults = { |
77 | .disable_ipv6 = 0, |
78 | .autoconf = 1, |
79 | }; |
80 | |
81 | static int disable_ipv6_mod = 0; |
82 | |
83 | module_param_named(disable, disable_ipv6_mod, int, 0444); |
84 | MODULE_PARM_DESC(disable, "Disable IPv6 module such that it is non-functional"); |
85 | |
86 | module_param_named(disable_ipv6, ipv6_defaults.disable_ipv6, int, 0444); |
87 | MODULE_PARM_DESC(disable_ipv6, "Disable IPv6 on all interfaces"); |
88 | |
89 | module_param_named(autoconf, ipv6_defaults.autoconf, int, 0444); |
90 | MODULE_PARM_DESC(autoconf, "Enable IPv6 address autoconfiguration on all interfaces"); |
91 | |
92 | static __inline__ struct ipv6_pinfo *inet6_sk_generic(struct sock *sk) |
93 | { |
94 | const int offset = sk->sk_prot->obj_size - sizeof(struct ipv6_pinfo); |
95 | |
96 | return (struct ipv6_pinfo *)(((u8 *)sk) + offset); |
97 | } |
98 | |
99 | static int inet6_create(struct net *net, struct socket *sock, int protocol, |
100 | int kern) |
101 | { |
102 | struct inet_sock *inet; |
103 | struct ipv6_pinfo *np; |
104 | struct sock *sk; |
105 | struct inet_protosw *answer; |
106 | struct proto *answer_prot; |
107 | unsigned char answer_flags; |
108 | char answer_no_check; |
109 | int try_loading_module = 0; |
110 | int err; |
111 | |
112 | if (sock->type != SOCK_RAW && |
113 | sock->type != SOCK_DGRAM && |
114 | !inet_ehash_secret) |
115 | build_ehash_secret(); |
116 | |
117 | /* Look for the requested type/protocol pair. */ |
118 | lookup_protocol: |
119 | err = -ESOCKTNOSUPPORT; |
120 | rcu_read_lock(); |
121 | list_for_each_entry_rcu(answer, &inetsw6[sock->type], list) { |
122 | |
123 | err = 0; |
124 | /* Check the non-wild match. */ |
125 | if (protocol == answer->protocol) { |
126 | if (protocol != IPPROTO_IP) |
127 | break; |
128 | } else { |
129 | /* Check for the two wild cases. */ |
130 | if (IPPROTO_IP == protocol) { |
131 | protocol = answer->protocol; |
132 | break; |
133 | } |
134 | if (IPPROTO_IP == answer->protocol) |
135 | break; |
136 | } |
137 | err = -EPROTONOSUPPORT; |
138 | } |
139 | |
140 | if (err) { |
141 | if (try_loading_module < 2) { |
142 | rcu_read_unlock(); |
143 | /* |
144 | * Be more specific, e.g. net-pf-10-proto-132-type-1 |
145 | * (net-pf-PF_INET6-proto-IPPROTO_SCTP-type-SOCK_STREAM) |
146 | */ |
147 | if (++try_loading_module == 1) |
148 | request_module("net-pf-%d-proto-%d-type-%d", |
149 | PF_INET6, protocol, sock->type); |
150 | /* |
151 | * Fall back to generic, e.g. net-pf-10-proto-132 |
152 | * (net-pf-PF_INET6-proto-IPPROTO_SCTP) |
153 | */ |
154 | else |
155 | request_module("net-pf-%d-proto-%d", |
156 | PF_INET6, protocol); |
157 | goto lookup_protocol; |
158 | } else |
159 | goto out_rcu_unlock; |
160 | } |
161 | |
162 | err = -EPERM; |
163 | if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW)) |
164 | goto out_rcu_unlock; |
165 | |
166 | sock->ops = answer->ops; |
167 | answer_prot = answer->prot; |
168 | answer_no_check = answer->no_check; |
169 | answer_flags = answer->flags; |
170 | rcu_read_unlock(); |
171 | |
172 | WARN_ON(answer_prot->slab == NULL); |
173 | |
174 | err = -ENOBUFS; |
175 | sk = sk_alloc(net, PF_INET6, GFP_KERNEL, answer_prot); |
176 | if (sk == NULL) |
177 | goto out; |
178 | |
179 | sock_init_data(sock, sk); |
180 | |
181 | err = 0; |
182 | sk->sk_no_check = answer_no_check; |
183 | if (INET_PROTOSW_REUSE & answer_flags) |
184 | sk->sk_reuse = 1; |
185 | |
186 | inet = inet_sk(sk); |
187 | inet->is_icsk = (INET_PROTOSW_ICSK & answer_flags) != 0; |
188 | |
189 | if (SOCK_RAW == sock->type) { |
190 | inet->inet_num = protocol; |
191 | if (IPPROTO_RAW == protocol) |
192 | inet->hdrincl = 1; |
193 | } |
194 | |
195 | sk->sk_destruct = inet_sock_destruct; |
196 | sk->sk_family = PF_INET6; |
197 | sk->sk_protocol = protocol; |
198 | |
199 | sk->sk_backlog_rcv = answer->prot->backlog_rcv; |
200 | |
201 | inet_sk(sk)->pinet6 = np = inet6_sk_generic(sk); |
202 | np->hop_limit = -1; |
203 | np->mcast_hops = IPV6_DEFAULT_MCASTHOPS; |
204 | np->mc_loop = 1; |
205 | np->pmtudisc = IPV6_PMTUDISC_WANT; |
206 | np->ipv6only = net->ipv6.sysctl.bindv6only; |
207 | |
208 | /* Init the ipv4 part of the socket since we can have sockets |
209 | * using v6 API for ipv4. |
210 | */ |
211 | inet->uc_ttl = -1; |
212 | |
213 | inet->mc_loop = 1; |
214 | inet->mc_ttl = 1; |
215 | inet->mc_index = 0; |
216 | inet->mc_list = NULL; |
217 | |
218 | if (ipv4_config.no_pmtu_disc) |
219 | inet->pmtudisc = IP_PMTUDISC_DONT; |
220 | else |
221 | inet->pmtudisc = IP_PMTUDISC_WANT; |
222 | /* |
223 | * Increment only the relevant sk_prot->socks debug field, this changes |
224 | * the previous behaviour of incrementing both the equivalent to |
225 | * answer->prot->socks (inet6_sock_nr) and inet_sock_nr. |
226 | * |
227 | * This allows better debug granularity as we'll know exactly how many |
228 | * UDPv6, TCPv6, etc socks were allocated, not the sum of all IPv6 |
229 | * transport protocol socks. -acme |
230 | */ |
231 | sk_refcnt_debug_inc(sk); |
232 | |
233 | if (inet->inet_num) { |
234 | /* It assumes that any protocol which allows |
235 | * the user to assign a number at socket |
236 | * creation time automatically shares. |
237 | */ |
238 | inet->inet_sport = htons(inet->inet_num); |
239 | sk->sk_prot->hash(sk); |
240 | } |
241 | if (sk->sk_prot->init) { |
242 | err = sk->sk_prot->init(sk); |
243 | if (err) { |
244 | sk_common_release(sk); |
245 | goto out; |
246 | } |
247 | } |
248 | out: |
249 | return err; |
250 | out_rcu_unlock: |
251 | rcu_read_unlock(); |
252 | goto out; |
253 | } |
254 | |
255 | |
256 | /* bind for INET6 API */ |
257 | int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len) |
258 | { |
259 | struct sockaddr_in6 *addr=(struct sockaddr_in6 *)uaddr; |
260 | struct sock *sk = sock->sk; |
261 | struct inet_sock *inet = inet_sk(sk); |
262 | struct ipv6_pinfo *np = inet6_sk(sk); |
263 | struct net *net = sock_net(sk); |
264 | __be32 v4addr = 0; |
265 | unsigned short snum; |
266 | int addr_type = 0; |
267 | int err = 0; |
268 | |
269 | /* If the socket has its own bind function then use it. */ |
270 | if (sk->sk_prot->bind) |
271 | return sk->sk_prot->bind(sk, uaddr, addr_len); |
272 | |
273 | if (addr_len < SIN6_LEN_RFC2133) |
274 | return -EINVAL; |
275 | addr_type = ipv6_addr_type(&addr->sin6_addr); |
276 | if ((addr_type & IPV6_ADDR_MULTICAST) && sock->type == SOCK_STREAM) |
277 | return -EINVAL; |
278 | |
279 | snum = ntohs(addr->sin6_port); |
280 | if (snum && snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE)) |
281 | return -EACCES; |
282 | |
283 | lock_sock(sk); |
284 | |
285 | /* Check these errors (active socket, double bind). */ |
286 | if (sk->sk_state != TCP_CLOSE || inet->inet_num) { |
287 | err = -EINVAL; |
288 | goto out; |
289 | } |
290 | |
291 | /* Check if the address belongs to the host. */ |
292 | if (addr_type == IPV6_ADDR_MAPPED) { |
293 | int chk_addr_ret; |
294 | |
295 | /* Binding to v4-mapped address on a v6-only socket |
296 | * makes no sense |
297 | */ |
298 | if (np->ipv6only) { |
299 | err = -EINVAL; |
300 | goto out; |
301 | } |
302 | |
303 | /* Reproduce AF_INET checks to make the bindings consitant */ |
304 | v4addr = addr->sin6_addr.s6_addr32[3]; |
305 | chk_addr_ret = inet_addr_type(net, v4addr); |
306 | if (!sysctl_ip_nonlocal_bind && |
307 | !(inet->freebind || inet->transparent) && |
308 | v4addr != htonl(INADDR_ANY) && |
309 | chk_addr_ret != RTN_LOCAL && |
310 | chk_addr_ret != RTN_MULTICAST && |
311 | chk_addr_ret != RTN_BROADCAST) { |
312 | err = -EADDRNOTAVAIL; |
313 | goto out; |
314 | } |
315 | } else { |
316 | if (addr_type != IPV6_ADDR_ANY) { |
317 | struct net_device *dev = NULL; |
318 | |
319 | rcu_read_lock(); |
320 | if (addr_type & IPV6_ADDR_LINKLOCAL) { |
321 | if (addr_len >= sizeof(struct sockaddr_in6) && |
322 | addr->sin6_scope_id) { |
323 | /* Override any existing binding, if another one |
324 | * is supplied by user. |
325 | */ |
326 | sk->sk_bound_dev_if = addr->sin6_scope_id; |
327 | } |
328 | |
329 | /* Binding to link-local address requires an interface */ |
330 | if (!sk->sk_bound_dev_if) { |
331 | err = -EINVAL; |
332 | goto out_unlock; |
333 | } |
334 | dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if); |
335 | if (!dev) { |
336 | err = -ENODEV; |
337 | goto out_unlock; |
338 | } |
339 | } |
340 | |
341 | /* ipv4 addr of the socket is invalid. Only the |
342 | * unspecified and mapped address have a v4 equivalent. |
343 | */ |
344 | v4addr = LOOPBACK4_IPV6; |
345 | if (!(addr_type & IPV6_ADDR_MULTICAST)) { |
346 | if (!ipv6_chk_addr(net, &addr->sin6_addr, |
347 | dev, 0)) { |
348 | err = -EADDRNOTAVAIL; |
349 | goto out_unlock; |
350 | } |
351 | } |
352 | rcu_read_unlock(); |
353 | } |
354 | } |
355 | |
356 | inet->inet_rcv_saddr = v4addr; |
357 | inet->inet_saddr = v4addr; |
358 | |
359 | ipv6_addr_copy(&np->rcv_saddr, &addr->sin6_addr); |
360 | |
361 | if (!(addr_type & IPV6_ADDR_MULTICAST)) |
362 | ipv6_addr_copy(&np->saddr, &addr->sin6_addr); |
363 | |
364 | /* Make sure we are allowed to bind here. */ |
365 | if (sk->sk_prot->get_port(sk, snum)) { |
366 | inet_reset_saddr(sk); |
367 | err = -EADDRINUSE; |
368 | goto out; |
369 | } |
370 | |
371 | if (addr_type != IPV6_ADDR_ANY) { |
372 | sk->sk_userlocks |= SOCK_BINDADDR_LOCK; |
373 | if (addr_type != IPV6_ADDR_MAPPED) |
374 | np->ipv6only = 1; |
375 | } |
376 | if (snum) |
377 | sk->sk_userlocks |= SOCK_BINDPORT_LOCK; |
378 | inet->inet_sport = htons(inet->inet_num); |
379 | inet->inet_dport = 0; |
380 | inet->inet_daddr = 0; |
381 | out: |
382 | release_sock(sk); |
383 | return err; |
384 | out_unlock: |
385 | rcu_read_unlock(); |
386 | goto out; |
387 | } |
388 | |
389 | EXPORT_SYMBOL(inet6_bind); |
390 | |
391 | int inet6_release(struct socket *sock) |
392 | { |
393 | struct sock *sk = sock->sk; |
394 | |
395 | if (sk == NULL) |
396 | return -EINVAL; |
397 | |
398 | /* Free mc lists */ |
399 | ipv6_sock_mc_close(sk); |
400 | |
401 | /* Free ac lists */ |
402 | ipv6_sock_ac_close(sk); |
403 | |
404 | return inet_release(sock); |
405 | } |
406 | |
407 | EXPORT_SYMBOL(inet6_release); |
408 | |
409 | void inet6_destroy_sock(struct sock *sk) |
410 | { |
411 | struct ipv6_pinfo *np = inet6_sk(sk); |
412 | struct sk_buff *skb; |
413 | struct ipv6_txoptions *opt; |
414 | |
415 | /* Release rx options */ |
416 | |
417 | if ((skb = xchg(&np->pktoptions, NULL)) != NULL) |
418 | kfree_skb(skb); |
419 | |
420 | /* Free flowlabels */ |
421 | fl6_free_socklist(sk); |
422 | |
423 | /* Free tx options */ |
424 | |
425 | if ((opt = xchg(&np->opt, NULL)) != NULL) |
426 | sock_kfree_s(sk, opt, opt->tot_len); |
427 | } |
428 | |
429 | EXPORT_SYMBOL_GPL(inet6_destroy_sock); |
430 | |
431 | /* |
432 | * This does both peername and sockname. |
433 | */ |
434 | |
435 | int inet6_getname(struct socket *sock, struct sockaddr *uaddr, |
436 | int *uaddr_len, int peer) |
437 | { |
438 | struct sockaddr_in6 *sin=(struct sockaddr_in6 *)uaddr; |
439 | struct sock *sk = sock->sk; |
440 | struct inet_sock *inet = inet_sk(sk); |
441 | struct ipv6_pinfo *np = inet6_sk(sk); |
442 | |
443 | sin->sin6_family = AF_INET6; |
444 | sin->sin6_flowinfo = 0; |
445 | sin->sin6_scope_id = 0; |
446 | if (peer) { |
447 | if (!inet->inet_dport) |
448 | return -ENOTCONN; |
449 | if (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) && |
450 | peer == 1) |
451 | return -ENOTCONN; |
452 | sin->sin6_port = inet->inet_dport; |
453 | ipv6_addr_copy(&sin->sin6_addr, &np->daddr); |
454 | if (np->sndflow) |
455 | sin->sin6_flowinfo = np->flow_label; |
456 | } else { |
457 | if (ipv6_addr_any(&np->rcv_saddr)) |
458 | ipv6_addr_copy(&sin->sin6_addr, &np->saddr); |
459 | else |
460 | ipv6_addr_copy(&sin->sin6_addr, &np->rcv_saddr); |
461 | |
462 | sin->sin6_port = inet->inet_sport; |
463 | } |
464 | if (ipv6_addr_type(&sin->sin6_addr) & IPV6_ADDR_LINKLOCAL) |
465 | sin->sin6_scope_id = sk->sk_bound_dev_if; |
466 | *uaddr_len = sizeof(*sin); |
467 | return(0); |
468 | } |
469 | |
470 | EXPORT_SYMBOL(inet6_getname); |
471 | |
472 | int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) |
473 | { |
474 | struct sock *sk = sock->sk; |
475 | struct net *net = sock_net(sk); |
476 | |
477 | switch(cmd) |
478 | { |
479 | case SIOCGSTAMP: |
480 | return sock_get_timestamp(sk, (struct timeval __user *)arg); |
481 | |
482 | case SIOCGSTAMPNS: |
483 | return sock_get_timestampns(sk, (struct timespec __user *)arg); |
484 | |
485 | case SIOCADDRT: |
486 | case SIOCDELRT: |
487 | |
488 | return(ipv6_route_ioctl(net, cmd, (void __user *)arg)); |
489 | |
490 | case SIOCSIFADDR: |
491 | return addrconf_add_ifaddr(net, (void __user *) arg); |
492 | case SIOCDIFADDR: |
493 | return addrconf_del_ifaddr(net, (void __user *) arg); |
494 | case SIOCSIFDSTADDR: |
495 | return addrconf_set_dstaddr(net, (void __user *) arg); |
496 | default: |
497 | if (!sk->sk_prot->ioctl) |
498 | return -ENOIOCTLCMD; |
499 | return sk->sk_prot->ioctl(sk, cmd, arg); |
500 | } |
501 | /*NOTREACHED*/ |
502 | return(0); |
503 | } |
504 | |
505 | EXPORT_SYMBOL(inet6_ioctl); |
506 | |
507 | const struct proto_ops inet6_stream_ops = { |
508 | .family = PF_INET6, |
509 | .owner = THIS_MODULE, |
510 | .release = inet6_release, |
511 | .bind = inet6_bind, |
512 | .connect = inet_stream_connect, /* ok */ |
513 | .socketpair = sock_no_socketpair, /* a do nothing */ |
514 | .accept = inet_accept, /* ok */ |
515 | .getname = inet6_getname, |
516 | .poll = tcp_poll, /* ok */ |
517 | .ioctl = inet6_ioctl, /* must change */ |
518 | .listen = inet_listen, /* ok */ |
519 | .shutdown = inet_shutdown, /* ok */ |
520 | .setsockopt = sock_common_setsockopt, /* ok */ |
521 | .getsockopt = sock_common_getsockopt, /* ok */ |
522 | .sendmsg = tcp_sendmsg, /* ok */ |
523 | .recvmsg = sock_common_recvmsg, /* ok */ |
524 | .mmap = sock_no_mmap, |
525 | .sendpage = tcp_sendpage, |
526 | .splice_read = tcp_splice_read, |
527 | #ifdef CONFIG_COMPAT |
528 | .compat_setsockopt = compat_sock_common_setsockopt, |
529 | .compat_getsockopt = compat_sock_common_getsockopt, |
530 | #endif |
531 | }; |
532 | |
533 | const struct proto_ops inet6_dgram_ops = { |
534 | .family = PF_INET6, |
535 | .owner = THIS_MODULE, |
536 | .release = inet6_release, |
537 | .bind = inet6_bind, |
538 | .connect = inet_dgram_connect, /* ok */ |
539 | .socketpair = sock_no_socketpair, /* a do nothing */ |
540 | .accept = sock_no_accept, /* a do nothing */ |
541 | .getname = inet6_getname, |
542 | .poll = udp_poll, /* ok */ |
543 | .ioctl = inet6_ioctl, /* must change */ |
544 | .listen = sock_no_listen, /* ok */ |
545 | .shutdown = inet_shutdown, /* ok */ |
546 | .setsockopt = sock_common_setsockopt, /* ok */ |
547 | .getsockopt = sock_common_getsockopt, /* ok */ |
548 | .sendmsg = inet_sendmsg, /* ok */ |
549 | .recvmsg = sock_common_recvmsg, /* ok */ |
550 | .mmap = sock_no_mmap, |
551 | .sendpage = sock_no_sendpage, |
552 | #ifdef CONFIG_COMPAT |
553 | .compat_setsockopt = compat_sock_common_setsockopt, |
554 | .compat_getsockopt = compat_sock_common_getsockopt, |
555 | #endif |
556 | }; |
557 | |
558 | static const struct net_proto_family inet6_family_ops = { |
559 | .family = PF_INET6, |
560 | .create = inet6_create, |
561 | .owner = THIS_MODULE, |
562 | }; |
563 | |
564 | int inet6_register_protosw(struct inet_protosw *p) |
565 | { |
566 | struct list_head *lh; |
567 | struct inet_protosw *answer; |
568 | struct list_head *last_perm; |
569 | int protocol = p->protocol; |
570 | int ret; |
571 | |
572 | spin_lock_bh(&inetsw6_lock); |
573 | |
574 | ret = -EINVAL; |
575 | if (p->type >= SOCK_MAX) |
576 | goto out_illegal; |
577 | |
578 | /* If we are trying to override a permanent protocol, bail. */ |
579 | answer = NULL; |
580 | ret = -EPERM; |
581 | last_perm = &inetsw6[p->type]; |
582 | list_for_each(lh, &inetsw6[p->type]) { |
583 | answer = list_entry(lh, struct inet_protosw, list); |
584 | |
585 | /* Check only the non-wild match. */ |
586 | if (INET_PROTOSW_PERMANENT & answer->flags) { |
587 | if (protocol == answer->protocol) |
588 | break; |
589 | last_perm = lh; |
590 | } |
591 | |
592 | answer = NULL; |
593 | } |
594 | if (answer) |
595 | goto out_permanent; |
596 | |
597 | /* Add the new entry after the last permanent entry if any, so that |
598 | * the new entry does not override a permanent entry when matched with |
599 | * a wild-card protocol. But it is allowed to override any existing |
600 | * non-permanent entry. This means that when we remove this entry, the |
601 | * system automatically returns to the old behavior. |
602 | */ |
603 | list_add_rcu(&p->list, last_perm); |
604 | ret = 0; |
605 | out: |
606 | spin_unlock_bh(&inetsw6_lock); |
607 | return ret; |
608 | |
609 | out_permanent: |
610 | printk(KERN_ERR "Attempt to override permanent protocol %d.\n", |
611 | protocol); |
612 | goto out; |
613 | |
614 | out_illegal: |
615 | printk(KERN_ERR |
616 | "Ignoring attempt to register invalid socket type %d.\n", |
617 | p->type); |
618 | goto out; |
619 | } |
620 | |
621 | EXPORT_SYMBOL(inet6_register_protosw); |
622 | |
623 | void |
624 | inet6_unregister_protosw(struct inet_protosw *p) |
625 | { |
626 | if (INET_PROTOSW_PERMANENT & p->flags) { |
627 | printk(KERN_ERR |
628 | "Attempt to unregister permanent protocol %d.\n", |
629 | p->protocol); |
630 | } else { |
631 | spin_lock_bh(&inetsw6_lock); |
632 | list_del_rcu(&p->list); |
633 | spin_unlock_bh(&inetsw6_lock); |
634 | |
635 | synchronize_net(); |
636 | } |
637 | } |
638 | |
639 | EXPORT_SYMBOL(inet6_unregister_protosw); |
640 | |
641 | int inet6_sk_rebuild_header(struct sock *sk) |
642 | { |
643 | int err; |
644 | struct dst_entry *dst; |
645 | struct ipv6_pinfo *np = inet6_sk(sk); |
646 | |
647 | dst = __sk_dst_check(sk, np->dst_cookie); |
648 | |
649 | if (dst == NULL) { |
650 | struct inet_sock *inet = inet_sk(sk); |
651 | struct in6_addr *final_p = NULL, final; |
652 | struct flowi fl; |
653 | |
654 | memset(&fl, 0, sizeof(fl)); |
655 | fl.proto = sk->sk_protocol; |
656 | ipv6_addr_copy(&fl.fl6_dst, &np->daddr); |
657 | ipv6_addr_copy(&fl.fl6_src, &np->saddr); |
658 | fl.fl6_flowlabel = np->flow_label; |
659 | fl.oif = sk->sk_bound_dev_if; |
660 | fl.mark = sk->sk_mark; |
661 | fl.fl_ip_dport = inet->inet_dport; |
662 | fl.fl_ip_sport = inet->inet_sport; |
663 | security_sk_classify_flow(sk, &fl); |
664 | |
665 | if (np->opt && np->opt->srcrt) { |
666 | struct rt0_hdr *rt0 = (struct rt0_hdr *) np->opt->srcrt; |
667 | ipv6_addr_copy(&final, &fl.fl6_dst); |
668 | ipv6_addr_copy(&fl.fl6_dst, rt0->addr); |
669 | final_p = &final; |
670 | } |
671 | |
672 | err = ip6_dst_lookup(sk, &dst, &fl); |
673 | if (err) { |
674 | sk->sk_route_caps = 0; |
675 | return err; |
676 | } |
677 | if (final_p) |
678 | ipv6_addr_copy(&fl.fl6_dst, final_p); |
679 | |
680 | if ((err = xfrm_lookup(sock_net(sk), &dst, &fl, sk, 0)) < 0) { |
681 | sk->sk_err_soft = -err; |
682 | return err; |
683 | } |
684 | |
685 | __ip6_dst_store(sk, dst, NULL, NULL); |
686 | } |
687 | |
688 | return 0; |
689 | } |
690 | |
691 | EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header); |
692 | |
693 | int ipv6_opt_accepted(struct sock *sk, struct sk_buff *skb) |
694 | { |
695 | struct ipv6_pinfo *np = inet6_sk(sk); |
696 | struct inet6_skb_parm *opt = IP6CB(skb); |
697 | |
698 | if (np->rxopt.all) { |
699 | if ((opt->hop && (np->rxopt.bits.hopopts || |
700 | np->rxopt.bits.ohopopts)) || |
701 | ((IPV6_FLOWINFO_MASK & |
702 | *(__be32 *)skb_network_header(skb)) && |
703 | np->rxopt.bits.rxflow) || |
704 | (opt->srcrt && (np->rxopt.bits.srcrt || |
705 | np->rxopt.bits.osrcrt)) || |
706 | ((opt->dst1 || opt->dst0) && |
707 | (np->rxopt.bits.dstopts || np->rxopt.bits.odstopts))) |
708 | return 1; |
709 | } |
710 | return 0; |
711 | } |
712 | |
713 | EXPORT_SYMBOL_GPL(ipv6_opt_accepted); |
714 | |
715 | static int ipv6_gso_pull_exthdrs(struct sk_buff *skb, int proto) |
716 | { |
717 | const struct inet6_protocol *ops = NULL; |
718 | |
719 | for (;;) { |
720 | struct ipv6_opt_hdr *opth; |
721 | int len; |
722 | |
723 | if (proto != NEXTHDR_HOP) { |
724 | ops = rcu_dereference(inet6_protos[proto]); |
725 | |
726 | if (unlikely(!ops)) |
727 | break; |
728 | |
729 | if (!(ops->flags & INET6_PROTO_GSO_EXTHDR)) |
730 | break; |
731 | } |
732 | |
733 | if (unlikely(!pskb_may_pull(skb, 8))) |
734 | break; |
735 | |
736 | opth = (void *)skb->data; |
737 | len = ipv6_optlen(opth); |
738 | |
739 | if (unlikely(!pskb_may_pull(skb, len))) |
740 | break; |
741 | |
742 | proto = opth->nexthdr; |
743 | __skb_pull(skb, len); |
744 | } |
745 | |
746 | return proto; |
747 | } |
748 | |
749 | static int ipv6_gso_send_check(struct sk_buff *skb) |
750 | { |
751 | struct ipv6hdr *ipv6h; |
752 | const struct inet6_protocol *ops; |
753 | int err = -EINVAL; |
754 | |
755 | if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h)))) |
756 | goto out; |
757 | |
758 | ipv6h = ipv6_hdr(skb); |
759 | __skb_pull(skb, sizeof(*ipv6h)); |
760 | err = -EPROTONOSUPPORT; |
761 | |
762 | rcu_read_lock(); |
763 | ops = rcu_dereference(inet6_protos[ |
764 | ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr)]); |
765 | |
766 | if (likely(ops && ops->gso_send_check)) { |
767 | skb_reset_transport_header(skb); |
768 | err = ops->gso_send_check(skb); |
769 | } |
770 | rcu_read_unlock(); |
771 | |
772 | out: |
773 | return err; |
774 | } |
775 | |
776 | static struct sk_buff *ipv6_gso_segment(struct sk_buff *skb, int features) |
777 | { |
778 | struct sk_buff *segs = ERR_PTR(-EINVAL); |
779 | struct ipv6hdr *ipv6h; |
780 | const struct inet6_protocol *ops; |
781 | int proto; |
782 | struct frag_hdr *fptr; |
783 | unsigned int unfrag_ip6hlen; |
784 | u8 *prevhdr; |
785 | int offset = 0; |
786 | |
787 | if (!(features & NETIF_F_V6_CSUM)) |
788 | features &= ~NETIF_F_SG; |
789 | |
790 | if (unlikely(skb_shinfo(skb)->gso_type & |
791 | ~(SKB_GSO_UDP | |
792 | SKB_GSO_DODGY | |
793 | SKB_GSO_TCP_ECN | |
794 | SKB_GSO_TCPV6 | |
795 | 0))) |
796 | goto out; |
797 | |
798 | if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h)))) |
799 | goto out; |
800 | |
801 | ipv6h = ipv6_hdr(skb); |
802 | __skb_pull(skb, sizeof(*ipv6h)); |
803 | segs = ERR_PTR(-EPROTONOSUPPORT); |
804 | |
805 | proto = ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr); |
806 | rcu_read_lock(); |
807 | ops = rcu_dereference(inet6_protos[proto]); |
808 | if (likely(ops && ops->gso_segment)) { |
809 | skb_reset_transport_header(skb); |
810 | segs = ops->gso_segment(skb, features); |
811 | } |
812 | rcu_read_unlock(); |
813 | |
814 | if (unlikely(IS_ERR(segs))) |
815 | goto out; |
816 | |
817 | for (skb = segs; skb; skb = skb->next) { |
818 | ipv6h = ipv6_hdr(skb); |
819 | ipv6h->payload_len = htons(skb->len - skb->mac_len - |
820 | sizeof(*ipv6h)); |
821 | if (proto == IPPROTO_UDP) { |
822 | unfrag_ip6hlen = ip6_find_1stfragopt(skb, &prevhdr); |
823 | fptr = (struct frag_hdr *)(skb_network_header(skb) + |
824 | unfrag_ip6hlen); |
825 | fptr->frag_off = htons(offset); |
826 | if (skb->next != NULL) |
827 | fptr->frag_off |= htons(IP6_MF); |
828 | offset += (ntohs(ipv6h->payload_len) - |
829 | sizeof(struct frag_hdr)); |
830 | } |
831 | } |
832 | |
833 | out: |
834 | return segs; |
835 | } |
836 | |
837 | struct ipv6_gro_cb { |
838 | struct napi_gro_cb napi; |
839 | int proto; |
840 | }; |
841 | |
842 | #define IPV6_GRO_CB(skb) ((struct ipv6_gro_cb *)(skb)->cb) |
843 | |
844 | static struct sk_buff **ipv6_gro_receive(struct sk_buff **head, |
845 | struct sk_buff *skb) |
846 | { |
847 | const struct inet6_protocol *ops; |
848 | struct sk_buff **pp = NULL; |
849 | struct sk_buff *p; |
850 | struct ipv6hdr *iph; |
851 | unsigned int nlen; |
852 | unsigned int hlen; |
853 | unsigned int off; |
854 | int flush = 1; |
855 | int proto; |
856 | __wsum csum; |
857 | |
858 | off = skb_gro_offset(skb); |
859 | hlen = off + sizeof(*iph); |
860 | iph = skb_gro_header_fast(skb, off); |
861 | if (skb_gro_header_hard(skb, hlen)) { |
862 | iph = skb_gro_header_slow(skb, hlen, off); |
863 | if (unlikely(!iph)) |
864 | goto out; |
865 | } |
866 | |
867 | skb_gro_pull(skb, sizeof(*iph)); |
868 | skb_set_transport_header(skb, skb_gro_offset(skb)); |
869 | |
870 | flush += ntohs(iph->payload_len) != skb_gro_len(skb); |
871 | |
872 | rcu_read_lock(); |
873 | proto = iph->nexthdr; |
874 | ops = rcu_dereference(inet6_protos[proto]); |
875 | if (!ops || !ops->gro_receive) { |
876 | __pskb_pull(skb, skb_gro_offset(skb)); |
877 | proto = ipv6_gso_pull_exthdrs(skb, proto); |
878 | skb_gro_pull(skb, -skb_transport_offset(skb)); |
879 | skb_reset_transport_header(skb); |
880 | __skb_push(skb, skb_gro_offset(skb)); |
881 | |
882 | if (!ops || !ops->gro_receive) |
883 | goto out_unlock; |
884 | |
885 | iph = ipv6_hdr(skb); |
886 | } |
887 | |
888 | IPV6_GRO_CB(skb)->proto = proto; |
889 | |
890 | flush--; |
891 | nlen = skb_network_header_len(skb); |
892 | |
893 | for (p = *head; p; p = p->next) { |
894 | struct ipv6hdr *iph2; |
895 | |
896 | if (!NAPI_GRO_CB(p)->same_flow) |
897 | continue; |
898 | |
899 | iph2 = ipv6_hdr(p); |
900 | |
901 | /* All fields must match except length. */ |
902 | if (nlen != skb_network_header_len(p) || |
903 | memcmp(iph, iph2, offsetof(struct ipv6hdr, payload_len)) || |
904 | memcmp(&iph->nexthdr, &iph2->nexthdr, |
905 | nlen - offsetof(struct ipv6hdr, nexthdr))) { |
906 | NAPI_GRO_CB(p)->same_flow = 0; |
907 | continue; |
908 | } |
909 | |
910 | NAPI_GRO_CB(p)->flush |= flush; |
911 | } |
912 | |
913 | NAPI_GRO_CB(skb)->flush |= flush; |
914 | |
915 | csum = skb->csum; |
916 | skb_postpull_rcsum(skb, iph, skb_network_header_len(skb)); |
917 | |
918 | pp = ops->gro_receive(head, skb); |
919 | |
920 | skb->csum = csum; |
921 | |
922 | out_unlock: |
923 | rcu_read_unlock(); |
924 | |
925 | out: |
926 | NAPI_GRO_CB(skb)->flush |= flush; |
927 | |
928 | return pp; |
929 | } |
930 | |
931 | static int ipv6_gro_complete(struct sk_buff *skb) |
932 | { |
933 | const struct inet6_protocol *ops; |
934 | struct ipv6hdr *iph = ipv6_hdr(skb); |
935 | int err = -ENOSYS; |
936 | |
937 | iph->payload_len = htons(skb->len - skb_network_offset(skb) - |
938 | sizeof(*iph)); |
939 | |
940 | rcu_read_lock(); |
941 | ops = rcu_dereference(inet6_protos[IPV6_GRO_CB(skb)->proto]); |
942 | if (WARN_ON(!ops || !ops->gro_complete)) |
943 | goto out_unlock; |
944 | |
945 | err = ops->gro_complete(skb); |
946 | |
947 | out_unlock: |
948 | rcu_read_unlock(); |
949 | |
950 | return err; |
951 | } |
952 | |
953 | static struct packet_type ipv6_packet_type __read_mostly = { |
954 | .type = cpu_to_be16(ETH_P_IPV6), |
955 | .func = ipv6_rcv, |
956 | .gso_send_check = ipv6_gso_send_check, |
957 | .gso_segment = ipv6_gso_segment, |
958 | .gro_receive = ipv6_gro_receive, |
959 | .gro_complete = ipv6_gro_complete, |
960 | }; |
961 | |
962 | static int __init ipv6_packet_init(void) |
963 | { |
964 | dev_add_pack(&ipv6_packet_type); |
965 | return 0; |
966 | } |
967 | |
968 | static void ipv6_packet_cleanup(void) |
969 | { |
970 | dev_remove_pack(&ipv6_packet_type); |
971 | } |
972 | |
973 | static int __net_init ipv6_init_mibs(struct net *net) |
974 | { |
975 | if (snmp_mib_init((void __percpu **)net->mib.udp_stats_in6, |
976 | sizeof (struct udp_mib)) < 0) |
977 | return -ENOMEM; |
978 | if (snmp_mib_init((void __percpu **)net->mib.udplite_stats_in6, |
979 | sizeof (struct udp_mib)) < 0) |
980 | goto err_udplite_mib; |
981 | if (snmp_mib_init((void __percpu **)net->mib.ipv6_statistics, |
982 | sizeof(struct ipstats_mib)) < 0) |
983 | goto err_ip_mib; |
984 | if (snmp_mib_init((void __percpu **)net->mib.icmpv6_statistics, |
985 | sizeof(struct icmpv6_mib)) < 0) |
986 | goto err_icmp_mib; |
987 | if (snmp_mib_init((void __percpu **)net->mib.icmpv6msg_statistics, |
988 | sizeof(struct icmpv6msg_mib)) < 0) |
989 | goto err_icmpmsg_mib; |
990 | return 0; |
991 | |
992 | err_icmpmsg_mib: |
993 | snmp_mib_free((void __percpu **)net->mib.icmpv6_statistics); |
994 | err_icmp_mib: |
995 | snmp_mib_free((void __percpu **)net->mib.ipv6_statistics); |
996 | err_ip_mib: |
997 | snmp_mib_free((void __percpu **)net->mib.udplite_stats_in6); |
998 | err_udplite_mib: |
999 | snmp_mib_free((void __percpu **)net->mib.udp_stats_in6); |
1000 | return -ENOMEM; |
1001 | } |
1002 | |
1003 | static void ipv6_cleanup_mibs(struct net *net) |
1004 | { |
1005 | snmp_mib_free((void __percpu **)net->mib.udp_stats_in6); |
1006 | snmp_mib_free((void __percpu **)net->mib.udplite_stats_in6); |
1007 | snmp_mib_free((void __percpu **)net->mib.ipv6_statistics); |
1008 | snmp_mib_free((void __percpu **)net->mib.icmpv6_statistics); |
1009 | snmp_mib_free((void __percpu **)net->mib.icmpv6msg_statistics); |
1010 | } |
1011 | |
1012 | static int __net_init inet6_net_init(struct net *net) |
1013 | { |
1014 | int err = 0; |
1015 | |
1016 | net->ipv6.sysctl.bindv6only = 0; |
1017 | net->ipv6.sysctl.icmpv6_time = 1*HZ; |
1018 | |
1019 | err = ipv6_init_mibs(net); |
1020 | if (err) |
1021 | return err; |
1022 | #ifdef CONFIG_PROC_FS |
1023 | err = udp6_proc_init(net); |
1024 | if (err) |
1025 | goto out; |
1026 | err = tcp6_proc_init(net); |
1027 | if (err) |
1028 | goto proc_tcp6_fail; |
1029 | err = ac6_proc_init(net); |
1030 | if (err) |
1031 | goto proc_ac6_fail; |
1032 | #endif |
1033 | return err; |
1034 | |
1035 | #ifdef CONFIG_PROC_FS |
1036 | proc_ac6_fail: |
1037 | tcp6_proc_exit(net); |
1038 | proc_tcp6_fail: |
1039 | udp6_proc_exit(net); |
1040 | out: |
1041 | ipv6_cleanup_mibs(net); |
1042 | return err; |
1043 | #endif |
1044 | } |
1045 | |
1046 | static void __net_exit inet6_net_exit(struct net *net) |
1047 | { |
1048 | #ifdef CONFIG_PROC_FS |
1049 | udp6_proc_exit(net); |
1050 | tcp6_proc_exit(net); |
1051 | ac6_proc_exit(net); |
1052 | #endif |
1053 | ipv6_cleanup_mibs(net); |
1054 | } |
1055 | |
1056 | static struct pernet_operations inet6_net_ops = { |
1057 | .init = inet6_net_init, |
1058 | .exit = inet6_net_exit, |
1059 | }; |
1060 | |
1061 | static int __init inet6_init(void) |
1062 | { |
1063 | struct sk_buff *dummy_skb; |
1064 | struct list_head *r; |
1065 | int err = 0; |
1066 | |
1067 | BUILD_BUG_ON(sizeof(struct inet6_skb_parm) > sizeof(dummy_skb->cb)); |
1068 | |
1069 | /* Register the socket-side information for inet6_create. */ |
1070 | for(r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r) |
1071 | INIT_LIST_HEAD(r); |
1072 | |
1073 | if (disable_ipv6_mod) { |
1074 | printk(KERN_INFO |
1075 | "IPv6: Loaded, but administratively disabled, " |
1076 | "reboot required to enable\n"); |
1077 | goto out; |
1078 | } |
1079 | |
1080 | err = proto_register(&tcpv6_prot, 1); |
1081 | if (err) |
1082 | goto out; |
1083 | |
1084 | err = proto_register(&udpv6_prot, 1); |
1085 | if (err) |
1086 | goto out_unregister_tcp_proto; |
1087 | |
1088 | err = proto_register(&udplitev6_prot, 1); |
1089 | if (err) |
1090 | goto out_unregister_udp_proto; |
1091 | |
1092 | err = proto_register(&rawv6_prot, 1); |
1093 | if (err) |
1094 | goto out_unregister_udplite_proto; |
1095 | |
1096 | |
1097 | /* We MUST register RAW sockets before we create the ICMP6, |
1098 | * IGMP6, or NDISC control sockets. |
1099 | */ |
1100 | err = rawv6_init(); |
1101 | if (err) |
1102 | goto out_unregister_raw_proto; |
1103 | |
1104 | /* Register the family here so that the init calls below will |
1105 | * be able to create sockets. (?? is this dangerous ??) |
1106 | */ |
1107 | err = sock_register(&inet6_family_ops); |
1108 | if (err) |
1109 | goto out_sock_register_fail; |
1110 | |
1111 | #ifdef CONFIG_SYSCTL |
1112 | err = ipv6_static_sysctl_register(); |
1113 | if (err) |
1114 | goto static_sysctl_fail; |
1115 | #endif |
1116 | /* |
1117 | * ipngwg API draft makes clear that the correct semantics |
1118 | * for TCP and UDP is to consider one TCP and UDP instance |
1119 | * in a host availiable by both INET and INET6 APIs and |
1120 | * able to communicate via both network protocols. |
1121 | */ |
1122 | |
1123 | err = register_pernet_subsys(&inet6_net_ops); |
1124 | if (err) |
1125 | goto register_pernet_fail; |
1126 | err = icmpv6_init(); |
1127 | if (err) |
1128 | goto icmp_fail; |
1129 | err = ip6_mr_init(); |
1130 | if (err) |
1131 | goto ipmr_fail; |
1132 | err = ndisc_init(); |
1133 | if (err) |
1134 | goto ndisc_fail; |
1135 | err = igmp6_init(); |
1136 | if (err) |
1137 | goto igmp_fail; |
1138 | err = ipv6_netfilter_init(); |
1139 | if (err) |
1140 | goto netfilter_fail; |
1141 | /* Create /proc/foo6 entries. */ |
1142 | #ifdef CONFIG_PROC_FS |
1143 | err = -ENOMEM; |
1144 | if (raw6_proc_init()) |
1145 | goto proc_raw6_fail; |
1146 | if (udplite6_proc_init()) |
1147 | goto proc_udplite6_fail; |
1148 | if (ipv6_misc_proc_init()) |
1149 | goto proc_misc6_fail; |
1150 | if (if6_proc_init()) |
1151 | goto proc_if6_fail; |
1152 | #endif |
1153 | err = ip6_route_init(); |
1154 | if (err) |
1155 | goto ip6_route_fail; |
1156 | err = ip6_flowlabel_init(); |
1157 | if (err) |
1158 | goto ip6_flowlabel_fail; |
1159 | err = addrconf_init(); |
1160 | if (err) |
1161 | goto addrconf_fail; |
1162 | |
1163 | /* Init v6 extension headers. */ |
1164 | err = ipv6_exthdrs_init(); |
1165 | if (err) |
1166 | goto ipv6_exthdrs_fail; |
1167 | |
1168 | err = ipv6_frag_init(); |
1169 | if (err) |
1170 | goto ipv6_frag_fail; |
1171 | |
1172 | /* Init v6 transport protocols. */ |
1173 | err = udpv6_init(); |
1174 | if (err) |
1175 | goto udpv6_fail; |
1176 | |
1177 | err = udplitev6_init(); |
1178 | if (err) |
1179 | goto udplitev6_fail; |
1180 | |
1181 | err = tcpv6_init(); |
1182 | if (err) |
1183 | goto tcpv6_fail; |
1184 | |
1185 | err = ipv6_packet_init(); |
1186 | if (err) |
1187 | goto ipv6_packet_fail; |
1188 | |
1189 | #ifdef CONFIG_SYSCTL |
1190 | err = ipv6_sysctl_register(); |
1191 | if (err) |
1192 | goto sysctl_fail; |
1193 | #endif |
1194 | out: |
1195 | return err; |
1196 | |
1197 | #ifdef CONFIG_SYSCTL |
1198 | sysctl_fail: |
1199 | ipv6_packet_cleanup(); |
1200 | #endif |
1201 | ipv6_packet_fail: |
1202 | tcpv6_exit(); |
1203 | tcpv6_fail: |
1204 | udplitev6_exit(); |
1205 | udplitev6_fail: |
1206 | udpv6_exit(); |
1207 | udpv6_fail: |
1208 | ipv6_frag_exit(); |
1209 | ipv6_frag_fail: |
1210 | ipv6_exthdrs_exit(); |
1211 | ipv6_exthdrs_fail: |
1212 | addrconf_cleanup(); |
1213 | addrconf_fail: |
1214 | ip6_flowlabel_cleanup(); |
1215 | ip6_flowlabel_fail: |
1216 | ip6_route_cleanup(); |
1217 | ip6_route_fail: |
1218 | #ifdef CONFIG_PROC_FS |
1219 | if6_proc_exit(); |
1220 | proc_if6_fail: |
1221 | ipv6_misc_proc_exit(); |
1222 | proc_misc6_fail: |
1223 | udplite6_proc_exit(); |
1224 | proc_udplite6_fail: |
1225 | raw6_proc_exit(); |
1226 | proc_raw6_fail: |
1227 | #endif |
1228 | ipv6_netfilter_fini(); |
1229 | netfilter_fail: |
1230 | igmp6_cleanup(); |
1231 | igmp_fail: |
1232 | ndisc_cleanup(); |
1233 | ndisc_fail: |
1234 | ip6_mr_cleanup(); |
1235 | ipmr_fail: |
1236 | icmpv6_cleanup(); |
1237 | icmp_fail: |
1238 | unregister_pernet_subsys(&inet6_net_ops); |
1239 | register_pernet_fail: |
1240 | #ifdef CONFIG_SYSCTL |
1241 | ipv6_static_sysctl_unregister(); |
1242 | static_sysctl_fail: |
1243 | #endif |
1244 | sock_unregister(PF_INET6); |
1245 | rtnl_unregister_all(PF_INET6); |
1246 | out_sock_register_fail: |
1247 | rawv6_exit(); |
1248 | out_unregister_raw_proto: |
1249 | proto_unregister(&rawv6_prot); |
1250 | out_unregister_udplite_proto: |
1251 | proto_unregister(&udplitev6_prot); |
1252 | out_unregister_udp_proto: |
1253 | proto_unregister(&udpv6_prot); |
1254 | out_unregister_tcp_proto: |
1255 | proto_unregister(&tcpv6_prot); |
1256 | goto out; |
1257 | } |
1258 | module_init(inet6_init); |
1259 | |
1260 | static void __exit inet6_exit(void) |
1261 | { |
1262 | if (disable_ipv6_mod) |
1263 | return; |
1264 | |
1265 | /* First of all disallow new sockets creation. */ |
1266 | sock_unregister(PF_INET6); |
1267 | /* Disallow any further netlink messages */ |
1268 | rtnl_unregister_all(PF_INET6); |
1269 | |
1270 | #ifdef CONFIG_SYSCTL |
1271 | ipv6_sysctl_unregister(); |
1272 | #endif |
1273 | udpv6_exit(); |
1274 | udplitev6_exit(); |
1275 | tcpv6_exit(); |
1276 | |
1277 | /* Cleanup code parts. */ |
1278 | ipv6_packet_cleanup(); |
1279 | ipv6_frag_exit(); |
1280 | ipv6_exthdrs_exit(); |
1281 | addrconf_cleanup(); |
1282 | ip6_flowlabel_cleanup(); |
1283 | ip6_route_cleanup(); |
1284 | #ifdef CONFIG_PROC_FS |
1285 | |
1286 | /* Cleanup code parts. */ |
1287 | if6_proc_exit(); |
1288 | ipv6_misc_proc_exit(); |
1289 | udplite6_proc_exit(); |
1290 | raw6_proc_exit(); |
1291 | #endif |
1292 | ipv6_netfilter_fini(); |
1293 | igmp6_cleanup(); |
1294 | ndisc_cleanup(); |
1295 | ip6_mr_cleanup(); |
1296 | icmpv6_cleanup(); |
1297 | rawv6_exit(); |
1298 | |
1299 | unregister_pernet_subsys(&inet6_net_ops); |
1300 | #ifdef CONFIG_SYSCTL |
1301 | ipv6_static_sysctl_unregister(); |
1302 | #endif |
1303 | proto_unregister(&rawv6_prot); |
1304 | proto_unregister(&udplitev6_prot); |
1305 | proto_unregister(&udpv6_prot); |
1306 | proto_unregister(&tcpv6_prot); |
1307 | |
1308 | rcu_barrier(); /* Wait for completion of call_rcu()'s */ |
1309 | } |
1310 | module_exit(inet6_exit); |
1311 | |
1312 | MODULE_ALIAS_NETPROTO(PF_INET6); |
1313 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
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jz-2.6.39
jz-3.0
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jz-3.11
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jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
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jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9