blob: 01edac888510cb7f4efb0c1ff994c4978a11bfaf [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * PF_INET6 socket protocol family
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09003 * Linux INET6 implementation
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 *
5 * Authors:
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09006 * Pedro Roque <roque@di.fc.ul.pt>
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 *
8 * Adapted from linux/net/ipv4/af_inet.c
9 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070010 * 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>
Randy Dunlap4fc268d2006-01-11 12:17:47 -080023#include <linux/capability.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070024#include <linux/errno.h>
25#include <linux/types.h>
26#include <linux/socket.h>
27#include <linux/in.h>
28#include <linux/kernel.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070029#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
40#include <linux/inet.h>
41#include <linux/netdevice.h>
42#include <linux/icmpv6.h>
Harald Welte2cc7d572005-08-09 19:42:34 -070043#include <linux/netfilter_ipv6.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070044
45#include <net/ip.h>
46#include <net/ipv6.h>
47#include <net/udp.h>
Gerrit Renkerba4e58e2006-11-27 11:10:57 -080048#include <net/udplite.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070049#include <net/tcp.h>
50#include <net/ipip.h>
51#include <net/protocol.h>
52#include <net/inet_common.h>
KOVACS Krisztian1668e012008-10-01 07:33:10 -070053#include <net/route.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070054#include <net/transp_v6.h>
55#include <net/ip6_route.h>
56#include <net/addrconf.h>
57#ifdef CONFIG_IPV6_TUNNEL
58#include <net/ip6_tunnel.h>
59#endif
60
61#include <asm/uaccess.h>
62#include <asm/system.h>
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +090063#include <linux/mroute6.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070064
65MODULE_AUTHOR("Cast of dozens");
66MODULE_DESCRIPTION("IPv6 protocol stack for Linux");
67MODULE_LICENSE("GPL");
68
Pavel Emelyanovf1267342007-11-23 21:28:44 +080069/* The inetsw6 table contains everything that inet6_create needs to
Linus Torvalds1da177e2005-04-16 15:20:36 -070070 * build a new socket.
71 */
72static struct list_head inetsw6[SOCK_MAX];
73static DEFINE_SPINLOCK(inetsw6_lock);
74
Linus Torvalds1da177e2005-04-16 15:20:36 -070075static __inline__ struct ipv6_pinfo *inet6_sk_generic(struct sock *sk)
76{
77 const int offset = sk->sk_prot->obj_size - sizeof(struct ipv6_pinfo);
78
79 return (struct ipv6_pinfo *)(((u8 *)sk) + offset);
80}
81
Eric W. Biederman1b8d7ae2007-10-08 23:24:22 -070082static int inet6_create(struct net *net, struct socket *sock, int protocol)
Linus Torvalds1da177e2005-04-16 15:20:36 -070083{
84 struct inet_sock *inet;
85 struct ipv6_pinfo *np;
86 struct sock *sk;
Linus Torvalds1da177e2005-04-16 15:20:36 -070087 struct inet_protosw *answer;
88 struct proto *answer_prot;
89 unsigned char answer_flags;
90 char answer_no_check;
YOSHIFUJI Hideakiaf1afe82005-12-02 20:56:57 -080091 int try_loading_module = 0;
92 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -070093
David S. Millerb3da2cf2007-03-23 11:40:27 -070094 if (sock->type != SOCK_RAW &&
95 sock->type != SOCK_DGRAM &&
96 !inet_ehash_secret)
97 build_ehash_secret();
98
Linus Torvalds1da177e2005-04-16 15:20:36 -070099 /* Look for the requested type/protocol pair. */
YOSHIFUJI Hideakiaf1afe82005-12-02 20:56:57 -0800100lookup_protocol:
101 err = -ESOCKTNOSUPPORT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102 rcu_read_lock();
Paul E. McKenney696adfe2008-07-25 01:45:34 -0700103 list_for_each_entry_rcu(answer, &inetsw6[sock->type], list) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104
Paul E. McKenney696adfe2008-07-25 01:45:34 -0700105 err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106 /* Check the non-wild match. */
107 if (protocol == answer->protocol) {
108 if (protocol != IPPROTO_IP)
109 break;
110 } else {
111 /* Check for the two wild cases. */
112 if (IPPROTO_IP == protocol) {
113 protocol = answer->protocol;
114 break;
115 }
116 if (IPPROTO_IP == answer->protocol)
117 break;
118 }
YOSHIFUJI Hideakiaf1afe82005-12-02 20:56:57 -0800119 err = -EPROTONOSUPPORT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120 }
121
Paul E. McKenney696adfe2008-07-25 01:45:34 -0700122 if (err) {
YOSHIFUJI Hideakiaf1afe82005-12-02 20:56:57 -0800123 if (try_loading_module < 2) {
124 rcu_read_unlock();
125 /*
126 * Be more specific, e.g. net-pf-10-proto-132-type-1
127 * (net-pf-PF_INET6-proto-IPPROTO_SCTP-type-SOCK_STREAM)
128 */
129 if (++try_loading_module == 1)
130 request_module("net-pf-%d-proto-%d-type-%d",
131 PF_INET6, protocol, sock->type);
132 /*
133 * Fall back to generic, e.g. net-pf-10-proto-132
134 * (net-pf-PF_INET6-proto-IPPROTO_SCTP)
135 */
136 else
137 request_module("net-pf-%d-proto-%d",
138 PF_INET6, protocol);
139 goto lookup_protocol;
140 } else
141 goto out_rcu_unlock;
142 }
143
144 err = -EPERM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145 if (answer->capability > 0 && !capable(answer->capability))
146 goto out_rcu_unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700147
148 sock->ops = answer->ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149 answer_prot = answer->prot;
150 answer_no_check = answer->no_check;
151 answer_flags = answer->flags;
152 rcu_read_unlock();
153
Ilpo Järvinen547b7922008-07-25 21:43:18 -0700154 WARN_ON(answer_prot->slab == NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155
YOSHIFUJI Hideakiaf1afe82005-12-02 20:56:57 -0800156 err = -ENOBUFS;
Pavel Emelyanov6257ff22007-11-01 00:39:31 -0700157 sk = sk_alloc(net, PF_INET6, GFP_KERNEL, answer_prot);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158 if (sk == NULL)
159 goto out;
160
161 sock_init_data(sock, sk);
162
YOSHIFUJI Hideakiaf1afe82005-12-02 20:56:57 -0800163 err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164 sk->sk_no_check = answer_no_check;
165 if (INET_PROTOSW_REUSE & answer_flags)
166 sk->sk_reuse = 1;
167
168 inet = inet_sk(sk);
Paul Moore469de9b2007-01-09 14:37:06 -0800169 inet->is_icsk = (INET_PROTOSW_ICSK & answer_flags) != 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170
171 if (SOCK_RAW == sock->type) {
172 inet->num = protocol;
173 if (IPPROTO_RAW == protocol)
174 inet->hdrincl = 1;
175 }
176
Arnaldo Carvalho de Meloe6848972005-08-09 19:45:38 -0700177 sk->sk_destruct = inet_sock_destruct;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178 sk->sk_family = PF_INET6;
179 sk->sk_protocol = protocol;
180
181 sk->sk_backlog_rcv = answer->prot->backlog_rcv;
182
183 inet_sk(sk)->pinet6 = np = inet6_sk_generic(sk);
184 np->hop_limit = -1;
185 np->mcast_hops = -1;
186 np->mc_loop = 1;
187 np->pmtudisc = IPV6_PMTUDISC_WANT;
Pavel Emelyanov2e761e02008-06-09 15:53:30 -0700188 np->ipv6only = net->ipv6.sysctl.bindv6only;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900189
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190 /* Init the ipv4 part of the socket since we can have sockets
191 * using v6 API for ipv4.
192 */
193 inet->uc_ttl = -1;
194
195 inet->mc_loop = 1;
196 inet->mc_ttl = 1;
197 inet->mc_index = 0;
198 inet->mc_list = NULL;
199
200 if (ipv4_config.no_pmtu_disc)
201 inet->pmtudisc = IP_PMTUDISC_DONT;
202 else
203 inet->pmtudisc = IP_PMTUDISC_WANT;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900204 /*
Arnaldo Carvalho de Meloe6848972005-08-09 19:45:38 -0700205 * Increment only the relevant sk_prot->socks debug field, this changes
206 * the previous behaviour of incrementing both the equivalent to
207 * answer->prot->socks (inet6_sock_nr) and inet_sock_nr.
208 *
209 * This allows better debug granularity as we'll know exactly how many
210 * UDPv6, TCPv6, etc socks were allocated, not the sum of all IPv6
211 * transport protocol socks. -acme
212 */
213 sk_refcnt_debug_inc(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215 if (inet->num) {
216 /* It assumes that any protocol which allows
217 * the user to assign a number at socket
218 * creation time automatically shares.
219 */
Al Viroe69a4adc2006-11-14 20:56:00 -0800220 inet->sport = htons(inet->num);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221 sk->sk_prot->hash(sk);
222 }
223 if (sk->sk_prot->init) {
YOSHIFUJI Hideakiaf1afe82005-12-02 20:56:57 -0800224 err = sk->sk_prot->init(sk);
225 if (err) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226 sk_common_release(sk);
227 goto out;
228 }
229 }
230out:
YOSHIFUJI Hideakiaf1afe82005-12-02 20:56:57 -0800231 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232out_rcu_unlock:
233 rcu_read_unlock();
234 goto out;
235}
236
237
238/* bind for INET6 API */
239int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
240{
241 struct sockaddr_in6 *addr=(struct sockaddr_in6 *)uaddr;
242 struct sock *sk = sock->sk;
243 struct inet_sock *inet = inet_sk(sk);
244 struct ipv6_pinfo *np = inet6_sk(sk);
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +0900245 struct net *net = sock_net(sk);
Al Virofd683222006-09-26 22:17:51 -0700246 __be32 v4addr = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247 unsigned short snum;
248 int addr_type = 0;
249 int err = 0;
250
251 /* If the socket has its own bind function then use it. */
252 if (sk->sk_prot->bind)
253 return sk->sk_prot->bind(sk, uaddr, addr_len);
254
255 if (addr_len < SIN6_LEN_RFC2133)
256 return -EINVAL;
257 addr_type = ipv6_addr_type(&addr->sin6_addr);
258 if ((addr_type & IPV6_ADDR_MULTICAST) && sock->type == SOCK_STREAM)
259 return -EINVAL;
260
261 snum = ntohs(addr->sin6_port);
262 if (snum && snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
263 return -EACCES;
264
265 lock_sock(sk);
266
267 /* Check these errors (active socket, double bind). */
268 if (sk->sk_state != TCP_CLOSE || inet->num) {
269 err = -EINVAL;
270 goto out;
271 }
272
273 /* Check if the address belongs to the host. */
274 if (addr_type == IPV6_ADDR_MAPPED) {
275 v4addr = addr->sin6_addr.s6_addr32[3];
Benjamin Thery075de932008-03-05 10:45:59 -0800276 if (inet_addr_type(net, v4addr) != RTN_LOCAL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277 err = -EADDRNOTAVAIL;
278 goto out;
279 }
280 } else {
281 if (addr_type != IPV6_ADDR_ANY) {
282 struct net_device *dev = NULL;
283
284 if (addr_type & IPV6_ADDR_LINKLOCAL) {
285 if (addr_len >= sizeof(struct sockaddr_in6) &&
286 addr->sin6_scope_id) {
287 /* Override any existing binding, if another one
288 * is supplied by user.
289 */
290 sk->sk_bound_dev_if = addr->sin6_scope_id;
291 }
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900292
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293 /* Binding to link-local address requires an interface */
294 if (!sk->sk_bound_dev_if) {
295 err = -EINVAL;
296 goto out;
297 }
Benjamin Thery075de932008-03-05 10:45:59 -0800298 dev = dev_get_by_index(net, sk->sk_bound_dev_if);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299 if (!dev) {
300 err = -ENODEV;
301 goto out;
302 }
303 }
304
305 /* ipv4 addr of the socket is invalid. Only the
306 * unspecified and mapped address have a v4 equivalent.
307 */
308 v4addr = LOOPBACK4_IPV6;
309 if (!(addr_type & IPV6_ADDR_MULTICAST)) {
Benjamin Thery075de932008-03-05 10:45:59 -0800310 if (!ipv6_chk_addr(net, &addr->sin6_addr,
Daniel Lezcanobfeade02008-01-10 22:43:18 -0800311 dev, 0)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312 if (dev)
313 dev_put(dev);
314 err = -EADDRNOTAVAIL;
315 goto out;
316 }
317 }
318 if (dev)
319 dev_put(dev);
320 }
321 }
322
323 inet->rcv_saddr = v4addr;
324 inet->saddr = v4addr;
325
326 ipv6_addr_copy(&np->rcv_saddr, &addr->sin6_addr);
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900327
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328 if (!(addr_type & IPV6_ADDR_MULTICAST))
329 ipv6_addr_copy(&np->saddr, &addr->sin6_addr);
330
331 /* Make sure we are allowed to bind here. */
332 if (sk->sk_prot->get_port(sk, snum)) {
333 inet_reset_saddr(sk);
334 err = -EADDRINUSE;
335 goto out;
336 }
337
338 if (addr_type != IPV6_ADDR_ANY)
339 sk->sk_userlocks |= SOCK_BINDADDR_LOCK;
340 if (snum)
341 sk->sk_userlocks |= SOCK_BINDPORT_LOCK;
Al Viroe69a4adc2006-11-14 20:56:00 -0800342 inet->sport = htons(inet->num);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343 inet->dport = 0;
344 inet->daddr = 0;
345out:
346 release_sock(sk);
347 return err;
348}
349
YOSHIFUJI Hideaki71590392007-02-22 22:05:40 +0900350EXPORT_SYMBOL(inet6_bind);
351
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352int inet6_release(struct socket *sock)
353{
354 struct sock *sk = sock->sk;
355
356 if (sk == NULL)
357 return -EINVAL;
358
359 /* Free mc lists */
360 ipv6_sock_mc_close(sk);
361
362 /* Free ac lists */
363 ipv6_sock_ac_close(sk);
364
365 return inet_release(sock);
366}
367
YOSHIFUJI Hideaki71590392007-02-22 22:05:40 +0900368EXPORT_SYMBOL(inet6_release);
369
Brian Haley7d06b2e2008-06-14 17:04:49 -0700370void inet6_destroy_sock(struct sock *sk)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371{
372 struct ipv6_pinfo *np = inet6_sk(sk);
373 struct sk_buff *skb;
374 struct ipv6_txoptions *opt;
375
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376 /* Release rx options */
377
378 if ((skb = xchg(&np->pktoptions, NULL)) != NULL)
379 kfree_skb(skb);
380
381 /* Free flowlabels */
382 fl6_free_socklist(sk);
383
384 /* Free tx options */
385
386 if ((opt = xchg(&np->opt, NULL)) != NULL)
387 sock_kfree_s(sk, opt, opt->tot_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388}
389
Arnaldo Carvalho de Melo3cf3dc62005-12-13 23:23:20 -0800390EXPORT_SYMBOL_GPL(inet6_destroy_sock);
391
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392/*
393 * This does both peername and sockname.
394 */
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900395
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
397 int *uaddr_len, int peer)
398{
399 struct sockaddr_in6 *sin=(struct sockaddr_in6 *)uaddr;
400 struct sock *sk = sock->sk;
401 struct inet_sock *inet = inet_sk(sk);
402 struct ipv6_pinfo *np = inet6_sk(sk);
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900403
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404 sin->sin6_family = AF_INET6;
405 sin->sin6_flowinfo = 0;
406 sin->sin6_scope_id = 0;
407 if (peer) {
408 if (!inet->dport)
409 return -ENOTCONN;
410 if (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) &&
411 peer == 1)
412 return -ENOTCONN;
413 sin->sin6_port = inet->dport;
414 ipv6_addr_copy(&sin->sin6_addr, &np->daddr);
415 if (np->sndflow)
416 sin->sin6_flowinfo = np->flow_label;
417 } else {
418 if (ipv6_addr_any(&np->rcv_saddr))
419 ipv6_addr_copy(&sin->sin6_addr, &np->saddr);
420 else
421 ipv6_addr_copy(&sin->sin6_addr, &np->rcv_saddr);
422
423 sin->sin6_port = inet->sport;
424 }
425 if (ipv6_addr_type(&sin->sin6_addr) & IPV6_ADDR_LINKLOCAL)
426 sin->sin6_scope_id = sk->sk_bound_dev_if;
427 *uaddr_len = sizeof(*sin);
428 return(0);
429}
430
YOSHIFUJI Hideaki71590392007-02-22 22:05:40 +0900431EXPORT_SYMBOL(inet6_getname);
432
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
434{
435 struct sock *sk = sock->sk;
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +0900436 struct net *net = sock_net(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900438 switch(cmd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439 {
440 case SIOCGSTAMP:
441 return sock_get_timestamp(sk, (struct timeval __user *)arg);
442
Eric Dumazetae40eb12007-03-18 17:33:16 -0700443 case SIOCGSTAMPNS:
444 return sock_get_timestampns(sk, (struct timespec __user *)arg);
445
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446 case SIOCADDRT:
447 case SIOCDELRT:
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900448
Daniel Lezcano55786892008-03-04 13:47:47 -0800449 return(ipv6_route_ioctl(net, cmd, (void __user *)arg));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700450
451 case SIOCSIFADDR:
Daniel Lezcanoaf284932008-03-05 10:46:57 -0800452 return addrconf_add_ifaddr(net, (void __user *) arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453 case SIOCDIFADDR:
Daniel Lezcanoaf284932008-03-05 10:46:57 -0800454 return addrconf_del_ifaddr(net, (void __user *) arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455 case SIOCSIFDSTADDR:
Daniel Lezcanoaf284932008-03-05 10:46:57 -0800456 return addrconf_set_dstaddr(net, (void __user *) arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457 default:
Christoph Hellwigb5e5fa52006-01-03 14:18:33 -0800458 if (!sk->sk_prot->ioctl)
459 return -ENOIOCTLCMD;
460 return sk->sk_prot->ioctl(sk, cmd, arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461 }
462 /*NOTREACHED*/
463 return(0);
464}
465
YOSHIFUJI Hideaki71590392007-02-22 22:05:40 +0900466EXPORT_SYMBOL(inet6_ioctl);
467
Eric Dumazet90ddc4f2005-12-22 12:49:22 -0800468const struct proto_ops inet6_stream_ops = {
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800469 .family = PF_INET6,
470 .owner = THIS_MODULE,
471 .release = inet6_release,
472 .bind = inet6_bind,
473 .connect = inet_stream_connect, /* ok */
474 .socketpair = sock_no_socketpair, /* a do nothing */
475 .accept = inet_accept, /* ok */
476 .getname = inet6_getname,
477 .poll = tcp_poll, /* ok */
478 .ioctl = inet6_ioctl, /* must change */
479 .listen = inet_listen, /* ok */
480 .shutdown = inet_shutdown, /* ok */
481 .setsockopt = sock_common_setsockopt, /* ok */
482 .getsockopt = sock_common_getsockopt, /* ok */
David S. Miller3516ffb2007-08-02 19:23:56 -0700483 .sendmsg = tcp_sendmsg, /* ok */
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800484 .recvmsg = sock_common_recvmsg, /* ok */
485 .mmap = sock_no_mmap,
486 .sendpage = tcp_sendpage,
Jens Axboea0974dd2007-11-06 23:31:58 -0800487 .splice_read = tcp_splice_read,
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800488#ifdef CONFIG_COMPAT
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800489 .compat_setsockopt = compat_sock_common_setsockopt,
490 .compat_getsockopt = compat_sock_common_getsockopt,
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800491#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492};
493
Eric Dumazet90ddc4f2005-12-22 12:49:22 -0800494const struct proto_ops inet6_dgram_ops = {
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800495 .family = PF_INET6,
496 .owner = THIS_MODULE,
497 .release = inet6_release,
498 .bind = inet6_bind,
499 .connect = inet_dgram_connect, /* ok */
500 .socketpair = sock_no_socketpair, /* a do nothing */
501 .accept = sock_no_accept, /* a do nothing */
502 .getname = inet6_getname,
503 .poll = udp_poll, /* ok */
504 .ioctl = inet6_ioctl, /* must change */
505 .listen = sock_no_listen, /* ok */
506 .shutdown = inet_shutdown, /* ok */
507 .setsockopt = sock_common_setsockopt, /* ok */
508 .getsockopt = sock_common_getsockopt, /* ok */
509 .sendmsg = inet_sendmsg, /* ok */
510 .recvmsg = sock_common_recvmsg, /* ok */
511 .mmap = sock_no_mmap,
512 .sendpage = sock_no_sendpage,
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800513#ifdef CONFIG_COMPAT
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800514 .compat_setsockopt = compat_sock_common_setsockopt,
515 .compat_getsockopt = compat_sock_common_getsockopt,
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800516#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517};
518
519static struct net_proto_family inet6_family_ops = {
520 .family = PF_INET6,
521 .create = inet6_create,
522 .owner = THIS_MODULE,
523};
524
Daniel Lezcano87c3efb2007-12-11 02:25:01 -0800525int inet6_register_protosw(struct inet_protosw *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526{
527 struct list_head *lh;
528 struct inet_protosw *answer;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529 struct list_head *last_perm;
Daniel Lezcano87c3efb2007-12-11 02:25:01 -0800530 int protocol = p->protocol;
531 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532
533 spin_lock_bh(&inetsw6_lock);
534
Daniel Lezcano87c3efb2007-12-11 02:25:01 -0800535 ret = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536 if (p->type >= SOCK_MAX)
537 goto out_illegal;
538
539 /* If we are trying to override a permanent protocol, bail. */
540 answer = NULL;
Daniel Lezcano87c3efb2007-12-11 02:25:01 -0800541 ret = -EPERM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542 last_perm = &inetsw6[p->type];
543 list_for_each(lh, &inetsw6[p->type]) {
544 answer = list_entry(lh, struct inet_protosw, list);
545
546 /* Check only the non-wild match. */
547 if (INET_PROTOSW_PERMANENT & answer->flags) {
548 if (protocol == answer->protocol)
549 break;
550 last_perm = lh;
551 }
552
553 answer = NULL;
554 }
555 if (answer)
556 goto out_permanent;
557
558 /* Add the new entry after the last permanent entry if any, so that
559 * the new entry does not override a permanent entry when matched with
560 * a wild-card protocol. But it is allowed to override any existing
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900561 * non-permanent entry. This means that when we remove this entry, the
Linus Torvalds1da177e2005-04-16 15:20:36 -0700562 * system automatically returns to the old behavior.
563 */
564 list_add_rcu(&p->list, last_perm);
Daniel Lezcano87c3efb2007-12-11 02:25:01 -0800565 ret = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566out:
567 spin_unlock_bh(&inetsw6_lock);
Daniel Lezcano87c3efb2007-12-11 02:25:01 -0800568 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569
570out_permanent:
571 printk(KERN_ERR "Attempt to override permanent protocol %d.\n",
572 protocol);
573 goto out;
574
575out_illegal:
576 printk(KERN_ERR
577 "Ignoring attempt to register invalid socket type %d.\n",
578 p->type);
579 goto out;
580}
581
YOSHIFUJI Hideaki71590392007-02-22 22:05:40 +0900582EXPORT_SYMBOL(inet6_register_protosw);
583
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584void
585inet6_unregister_protosw(struct inet_protosw *p)
586{
587 if (INET_PROTOSW_PERMANENT & p->flags) {
588 printk(KERN_ERR
589 "Attempt to unregister permanent protocol %d.\n",
590 p->protocol);
591 } else {
592 spin_lock_bh(&inetsw6_lock);
593 list_del_rcu(&p->list);
594 spin_unlock_bh(&inetsw6_lock);
595
596 synchronize_net();
597 }
598}
599
YOSHIFUJI Hideaki71590392007-02-22 22:05:40 +0900600EXPORT_SYMBOL(inet6_unregister_protosw);
601
Arnaldo Carvalho de Melob9750ce2005-12-13 23:22:54 -0800602int inet6_sk_rebuild_header(struct sock *sk)
603{
604 int err;
605 struct dst_entry *dst;
606 struct ipv6_pinfo *np = inet6_sk(sk);
607
608 dst = __sk_dst_check(sk, np->dst_cookie);
609
610 if (dst == NULL) {
611 struct inet_sock *inet = inet_sk(sk);
612 struct in6_addr *final_p = NULL, final;
613 struct flowi fl;
614
615 memset(&fl, 0, sizeof(fl));
616 fl.proto = sk->sk_protocol;
617 ipv6_addr_copy(&fl.fl6_dst, &np->daddr);
618 ipv6_addr_copy(&fl.fl6_src, &np->saddr);
619 fl.fl6_flowlabel = np->flow_label;
620 fl.oif = sk->sk_bound_dev_if;
621 fl.fl_ip_dport = inet->dport;
622 fl.fl_ip_sport = inet->sport;
Venkat Yekkiralabeb8d132006-08-04 23:12:42 -0700623 security_sk_classify_flow(sk, &fl);
Arnaldo Carvalho de Melob9750ce2005-12-13 23:22:54 -0800624
625 if (np->opt && np->opt->srcrt) {
626 struct rt0_hdr *rt0 = (struct rt0_hdr *) np->opt->srcrt;
627 ipv6_addr_copy(&final, &fl.fl6_dst);
628 ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
629 final_p = &final;
630 }
631
632 err = ip6_dst_lookup(sk, &dst, &fl);
633 if (err) {
634 sk->sk_route_caps = 0;
635 return err;
636 }
637 if (final_p)
638 ipv6_addr_copy(&fl.fl6_dst, final_p);
639
640 if ((err = xfrm_lookup(&dst, &fl, sk, 0)) < 0) {
641 sk->sk_err_soft = -err;
642 return err;
643 }
644
YOSHIFUJI Hideaki8e1ef0a2006-08-29 17:15:09 -0700645 __ip6_dst_store(sk, dst, NULL, NULL);
Arnaldo Carvalho de Melob9750ce2005-12-13 23:22:54 -0800646 }
647
648 return 0;
649}
650
651EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header);
652
Arnaldo Carvalho de Melo399c07d2005-12-13 23:24:28 -0800653int ipv6_opt_accepted(struct sock *sk, struct sk_buff *skb)
654{
655 struct ipv6_pinfo *np = inet6_sk(sk);
656 struct inet6_skb_parm *opt = IP6CB(skb);
657
658 if (np->rxopt.all) {
659 if ((opt->hop && (np->rxopt.bits.hopopts ||
660 np->rxopt.bits.ohopopts)) ||
Arnaldo Carvalho de Melod56f90a2007-04-10 20:50:43 -0700661 ((IPV6_FLOWINFO_MASK &
662 *(__be32 *)skb_network_header(skb)) &&
Arnaldo Carvalho de Melo399c07d2005-12-13 23:24:28 -0800663 np->rxopt.bits.rxflow) ||
664 (opt->srcrt && (np->rxopt.bits.srcrt ||
665 np->rxopt.bits.osrcrt)) ||
666 ((opt->dst1 || opt->dst0) &&
667 (np->rxopt.bits.dstopts || np->rxopt.bits.odstopts)))
668 return 1;
669 }
670 return 0;
671}
672
673EXPORT_SYMBOL_GPL(ipv6_opt_accepted);
674
YOSHIFUJI Hideaki662397f2008-02-27 23:14:03 +0900675static struct inet6_protocol *ipv6_gso_pull_exthdrs(struct sk_buff *skb,
676 int proto)
677{
678 struct inet6_protocol *ops = NULL;
679
680 for (;;) {
681 struct ipv6_opt_hdr *opth;
682 int len;
683
684 if (proto != NEXTHDR_HOP) {
685 ops = rcu_dereference(inet6_protos[proto]);
686
687 if (unlikely(!ops))
688 break;
689
690 if (!(ops->flags & INET6_PROTO_GSO_EXTHDR))
691 break;
692 }
693
694 if (unlikely(!pskb_may_pull(skb, 8)))
695 break;
696
697 opth = (void *)skb->data;
698 len = ipv6_optlen(opth);
699
700 if (unlikely(!pskb_may_pull(skb, len)))
701 break;
702
703 proto = opth->nexthdr;
704 __skb_pull(skb, len);
705 }
706
707 return ops;
708}
709
710static int ipv6_gso_send_check(struct sk_buff *skb)
711{
712 struct ipv6hdr *ipv6h;
713 struct inet6_protocol *ops;
714 int err = -EINVAL;
715
716 if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h))))
717 goto out;
718
719 ipv6h = ipv6_hdr(skb);
720 __skb_pull(skb, sizeof(*ipv6h));
721 err = -EPROTONOSUPPORT;
722
723 rcu_read_lock();
724 ops = ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr);
725 if (likely(ops && ops->gso_send_check)) {
726 skb_reset_transport_header(skb);
727 err = ops->gso_send_check(skb);
728 }
729 rcu_read_unlock();
730
731out:
732 return err;
733}
734
735static struct sk_buff *ipv6_gso_segment(struct sk_buff *skb, int features)
736{
737 struct sk_buff *segs = ERR_PTR(-EINVAL);
738 struct ipv6hdr *ipv6h;
739 struct inet6_protocol *ops;
740
741 if (!(features & NETIF_F_V6_CSUM))
742 features &= ~NETIF_F_SG;
743
744 if (unlikely(skb_shinfo(skb)->gso_type &
745 ~(SKB_GSO_UDP |
746 SKB_GSO_DODGY |
747 SKB_GSO_TCP_ECN |
748 SKB_GSO_TCPV6 |
749 0)))
750 goto out;
751
752 if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h))))
753 goto out;
754
755 ipv6h = ipv6_hdr(skb);
756 __skb_pull(skb, sizeof(*ipv6h));
757 segs = ERR_PTR(-EPROTONOSUPPORT);
758
759 rcu_read_lock();
760 ops = ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr);
761 if (likely(ops && ops->gso_segment)) {
762 skb_reset_transport_header(skb);
763 segs = ops->gso_segment(skb, features);
764 }
765 rcu_read_unlock();
766
767 if (unlikely(IS_ERR(segs)))
768 goto out;
769
770 for (skb = segs; skb; skb = skb->next) {
771 ipv6h = ipv6_hdr(skb);
772 ipv6h->payload_len = htons(skb->len - skb->mac_len -
773 sizeof(*ipv6h));
774 }
775
776out:
777 return segs;
778}
779
780static struct packet_type ipv6_packet_type = {
781 .type = __constant_htons(ETH_P_IPV6),
782 .func = ipv6_rcv,
783 .gso_send_check = ipv6_gso_send_check,
784 .gso_segment = ipv6_gso_segment,
785};
786
787static int __init ipv6_packet_init(void)
788{
789 dev_add_pack(&ipv6_packet_type);
790 return 0;
791}
792
793static void ipv6_packet_cleanup(void)
794{
795 dev_remove_pack(&ipv6_packet_type);
796}
797
Denis V. Luneve43291c2008-10-07 14:48:53 -0700798static int __net_init ipv6_init_mibs(struct net *net)
799{
Denis V. Lunev0c7ed672008-10-07 14:49:36 -0700800 if (snmp_mib_init((void **)net->mib.udp_stats_in6,
801 sizeof (struct udp_mib)) < 0)
802 return -ENOMEM;
Denis V. Lunevbe713a42008-10-07 14:50:06 -0700803 if (snmp_mib_init((void **)net->mib.udplite_stats_in6,
804 sizeof (struct udp_mib)) < 0)
805 goto err_udplite_mib;
Denis V. Lunev9261e532008-10-08 10:36:03 -0700806 if (snmp_mib_init((void **)net->mib.ipv6_statistics,
807 sizeof(struct ipstats_mib)) < 0)
808 goto err_ip_mib;
809 if (snmp_mib_init((void **)net->mib.icmpv6_statistics,
810 sizeof(struct icmpv6_mib)) < 0)
811 goto err_icmp_mib;
812 if (snmp_mib_init((void **)net->mib.icmpv6msg_statistics,
813 sizeof(struct icmpv6msg_mib)) < 0)
814 goto err_icmpmsg_mib;
Denis V. Luneve43291c2008-10-07 14:48:53 -0700815 return 0;
Denis V. Lunevbe713a42008-10-07 14:50:06 -0700816
Denis V. Lunev9261e532008-10-08 10:36:03 -0700817err_icmpmsg_mib:
818 snmp_mib_free((void **)net->mib.icmpv6_statistics);
819err_icmp_mib:
820 snmp_mib_free((void **)net->mib.ipv6_statistics);
821err_ip_mib:
822 snmp_mib_free((void **)net->mib.udplite_stats_in6);
Denis V. Lunevbe713a42008-10-07 14:50:06 -0700823err_udplite_mib:
824 snmp_mib_free((void **)net->mib.udp_stats_in6);
825 return -ENOMEM;
Denis V. Luneve43291c2008-10-07 14:48:53 -0700826}
827
828static void __net_exit ipv6_cleanup_mibs(struct net *net)
829{
Denis V. Lunev0c7ed672008-10-07 14:49:36 -0700830 snmp_mib_free((void **)net->mib.udp_stats_in6);
Denis V. Lunevbe713a42008-10-07 14:50:06 -0700831 snmp_mib_free((void **)net->mib.udplite_stats_in6);
Denis V. Lunev9261e532008-10-08 10:36:03 -0700832 snmp_mib_free((void **)net->mib.ipv6_statistics);
833 snmp_mib_free((void **)net->mib.icmpv6_statistics);
834 snmp_mib_free((void **)net->mib.icmpv6msg_statistics);
Denis V. Luneve43291c2008-10-07 14:48:53 -0700835}
836
Alexey Dobriyane7dc8492008-10-13 18:54:07 -0700837static int __net_init inet6_net_init(struct net *net)
Daniel Lezcano81c1c172008-01-10 02:48:33 -0800838{
Daniel Lezcano0c96d8c2008-03-21 04:14:17 -0700839 int err = 0;
840
Daniel Lezcano99bc9c42008-01-10 02:54:53 -0800841 net->ipv6.sysctl.bindv6only = 0;
Daniel Lezcano41a76902008-01-10 03:02:40 -0800842 net->ipv6.sysctl.icmpv6_time = 1*HZ;
Daniel Lezcanoe71e0342008-01-10 02:56:03 -0800843
Denis V. Luneve43291c2008-10-07 14:48:53 -0700844 err = ipv6_init_mibs(net);
845 if (err)
846 return err;
Daniel Lezcano0c96d8c2008-03-21 04:14:17 -0700847#ifdef CONFIG_PROC_FS
848 err = udp6_proc_init(net);
849 if (err)
850 goto out;
Daniel Lezcano6f8b13b2008-03-21 04:14:45 -0700851 err = tcp6_proc_init(net);
852 if (err)
853 goto proc_tcp6_fail;
Daniel Lezcano6ab57e72008-03-26 16:52:32 -0700854 err = ac6_proc_init(net);
855 if (err)
856 goto proc_ac6_fail;
Daniel Lezcano0c96d8c2008-03-21 04:14:17 -0700857#endif
858 return err;
Daniel Lezcano6f8b13b2008-03-21 04:14:45 -0700859
860#ifdef CONFIG_PROC_FS
Daniel Lezcano6ab57e72008-03-26 16:52:32 -0700861proc_ac6_fail:
862 tcp6_proc_exit(net);
Daniel Lezcano6f8b13b2008-03-21 04:14:45 -0700863proc_tcp6_fail:
864 udp6_proc_exit(net);
Denis V. Luneve43291c2008-10-07 14:48:53 -0700865out:
866 ipv6_cleanup_mibs(net);
867 return err;
Daniel Lezcano6f8b13b2008-03-21 04:14:45 -0700868#endif
Daniel Lezcano81c1c172008-01-10 02:48:33 -0800869}
870
871static void inet6_net_exit(struct net *net)
872{
Daniel Lezcano0c96d8c2008-03-21 04:14:17 -0700873#ifdef CONFIG_PROC_FS
874 udp6_proc_exit(net);
Daniel Lezcano6f8b13b2008-03-21 04:14:45 -0700875 tcp6_proc_exit(net);
Daniel Lezcano6ab57e72008-03-26 16:52:32 -0700876 ac6_proc_exit(net);
Daniel Lezcano0c96d8c2008-03-21 04:14:17 -0700877#endif
Denis V. Luneve43291c2008-10-07 14:48:53 -0700878 ipv6_cleanup_mibs(net);
Daniel Lezcano81c1c172008-01-10 02:48:33 -0800879}
880
881static struct pernet_operations inet6_net_ops = {
882 .init = inet6_net_init,
883 .exit = inet6_net_exit,
884};
885
Linus Torvalds1da177e2005-04-16 15:20:36 -0700886static int __init inet6_init(void)
887{
888 struct sk_buff *dummy_skb;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900889 struct list_head *r;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700890 int err;
891
YOSHIFUJI Hideakief047f52006-09-01 00:29:06 -0700892 BUILD_BUG_ON(sizeof(struct inet6_skb_parm) > sizeof(dummy_skb->cb));
893
Linus Torvalds1da177e2005-04-16 15:20:36 -0700894 err = proto_register(&tcpv6_prot, 1);
895 if (err)
896 goto out;
897
898 err = proto_register(&udpv6_prot, 1);
899 if (err)
900 goto out_unregister_tcp_proto;
901
Gerrit Renkerba4e58e2006-11-27 11:10:57 -0800902 err = proto_register(&udplitev6_prot, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700903 if (err)
904 goto out_unregister_udp_proto;
905
Gerrit Renkerba4e58e2006-11-27 11:10:57 -0800906 err = proto_register(&rawv6_prot, 1);
907 if (err)
908 goto out_unregister_udplite_proto;
909
Linus Torvalds1da177e2005-04-16 15:20:36 -0700910
911 /* Register the socket-side information for inet6_create. */
912 for(r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r)
913 INIT_LIST_HEAD(r);
914
915 /* We MUST register RAW sockets before we create the ICMP6,
916 * IGMP6, or NDISC control sockets.
917 */
Daniel Lezcano7f4e4862007-12-11 02:25:35 -0800918 err = rawv6_init();
919 if (err)
920 goto out_unregister_raw_proto;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700921
922 /* Register the family here so that the init calls below will
923 * be able to create sockets. (?? is this dangerous ??)
924 */
David S. Miller8eb55912005-11-11 15:05:47 -0800925 err = sock_register(&inet6_family_ops);
926 if (err)
Daniel Lezcano7f4e4862007-12-11 02:25:35 -0800927 goto out_sock_register_fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700928
Al Viroeeb61f72008-07-27 08:59:33 +0100929#ifdef CONFIG_SYSCTL
930 err = ipv6_static_sysctl_register();
931 if (err)
932 goto static_sysctl_fail;
933#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700934 /*
935 * ipngwg API draft makes clear that the correct semantics
936 * for TCP and UDP is to consider one TCP and UDP instance
937 * in a host availiable by both INET and INET6 APIs and
938 * able to communicate via both network protocols.
939 */
940
Daniel Lezcano81c1c172008-01-10 02:48:33 -0800941 err = register_pernet_subsys(&inet6_net_ops);
942 if (err)
943 goto register_pernet_fail;
Denis V. Lunev9b0f9762008-02-29 11:13:15 -0800944 err = icmpv6_init();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700945 if (err)
946 goto icmp_fail;
Wang Chen623d1a12008-07-03 12:13:30 +0800947 err = ip6_mr_init();
948 if (err)
949 goto ipmr_fail;
Denis V. Lunev9b0f9762008-02-29 11:13:15 -0800950 err = ndisc_init();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700951 if (err)
952 goto ndisc_fail;
Denis V. Lunev9b0f9762008-02-29 11:13:15 -0800953 err = igmp6_init();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700954 if (err)
955 goto igmp_fail;
Harald Welte2cc7d572005-08-09 19:42:34 -0700956 err = ipv6_netfilter_init();
957 if (err)
958 goto netfilter_fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700959 /* Create /proc/foo6 entries. */
960#ifdef CONFIG_PROC_FS
961 err = -ENOMEM;
962 if (raw6_proc_init())
963 goto proc_raw6_fail;
Gerrit Renkerba4e58e2006-11-27 11:10:57 -0800964 if (udplite6_proc_init())
965 goto proc_udplite6_fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700966 if (ipv6_misc_proc_init())
967 goto proc_misc6_fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700968 if (if6_proc_init())
969 goto proc_if6_fail;
970#endif
Daniel Lezcanoe2fddf52007-12-07 00:44:29 -0800971 err = ip6_route_init();
972 if (err)
973 goto ip6_route_fail;
Daniel Lezcano0a3e78a2007-12-11 02:23:18 -0800974 err = ip6_flowlabel_init();
975 if (err)
976 goto ip6_flowlabel_fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700977 err = addrconf_init();
978 if (err)
979 goto addrconf_fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700980
981 /* Init v6 extension headers. */
Daniel Lezcano248b2382007-12-11 02:23:54 -0800982 err = ipv6_exthdrs_init();
983 if (err)
984 goto ipv6_exthdrs_fail;
985
Daniel Lezcano853cbba2007-12-11 02:24:29 -0800986 err = ipv6_frag_init();
987 if (err)
988 goto ipv6_frag_fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700989
990 /* Init v6 transport protocols. */
Daniel Lezcano7f4e4862007-12-11 02:25:35 -0800991 err = udpv6_init();
992 if (err)
993 goto udpv6_fail;
Herbert Xue2ed4052005-07-05 14:41:20 -0700994
Daniel Lezcano7f4e4862007-12-11 02:25:35 -0800995 err = udplitev6_init();
996 if (err)
997 goto udplitev6_fail;
998
999 err = tcpv6_init();
1000 if (err)
1001 goto tcpv6_fail;
1002
1003 err = ipv6_packet_init();
1004 if (err)
1005 goto ipv6_packet_fail;
Benjamin Thery94911fe2008-03-05 10:45:36 -08001006
1007#ifdef CONFIG_SYSCTL
1008 err = ipv6_sysctl_register();
1009 if (err)
1010 goto sysctl_fail;
1011#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001012out:
1013 return err;
1014
Benjamin Thery94911fe2008-03-05 10:45:36 -08001015#ifdef CONFIG_SYSCTL
1016sysctl_fail:
1017 ipv6_packet_cleanup();
1018#endif
Daniel Lezcano7f4e4862007-12-11 02:25:35 -08001019ipv6_packet_fail:
1020 tcpv6_exit();
1021tcpv6_fail:
1022 udplitev6_exit();
1023udplitev6_fail:
1024 udpv6_exit();
1025udpv6_fail:
1026 ipv6_frag_exit();
Daniel Lezcano853cbba2007-12-11 02:24:29 -08001027ipv6_frag_fail:
1028 ipv6_exthdrs_exit();
Daniel Lezcano248b2382007-12-11 02:23:54 -08001029ipv6_exthdrs_fail:
1030 addrconf_cleanup();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001031addrconf_fail:
1032 ip6_flowlabel_cleanup();
Daniel Lezcano0a3e78a2007-12-11 02:23:18 -08001033ip6_flowlabel_fail:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001034 ip6_route_cleanup();
Daniel Lezcanoe2fddf52007-12-07 00:44:29 -08001035ip6_route_fail:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001036#ifdef CONFIG_PROC_FS
1037 if6_proc_exit();
1038proc_if6_fail:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001039 ipv6_misc_proc_exit();
1040proc_misc6_fail:
Gerrit Renkerba4e58e2006-11-27 11:10:57 -08001041 udplite6_proc_exit();
1042proc_udplite6_fail:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001043 raw6_proc_exit();
1044proc_raw6_fail:
1045#endif
Harald Welte2cc7d572005-08-09 19:42:34 -07001046 ipv6_netfilter_fini();
1047netfilter_fail:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001048 igmp6_cleanup();
1049igmp_fail:
1050 ndisc_cleanup();
1051ndisc_fail:
Wang Chen623d1a12008-07-03 12:13:30 +08001052 ip6_mr_cleanup();
1053ipmr_fail:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001054 icmpv6_cleanup();
1055icmp_fail:
Daniel Lezcano81c1c172008-01-10 02:48:33 -08001056 unregister_pernet_subsys(&inet6_net_ops);
1057register_pernet_fail:
Al Viroeeb61f72008-07-27 08:59:33 +01001058#ifdef CONFIG_SYSCTL
1059 ipv6_static_sysctl_unregister();
1060static_sysctl_fail:
1061#endif
David S. Miller8eb55912005-11-11 15:05:47 -08001062 sock_unregister(PF_INET6);
Daniel Lezcanoe2fddf52007-12-07 00:44:29 -08001063 rtnl_unregister_all(PF_INET6);
Daniel Lezcano7f4e4862007-12-11 02:25:35 -08001064out_sock_register_fail:
1065 rawv6_exit();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001066out_unregister_raw_proto:
1067 proto_unregister(&rawv6_prot);
Gerrit Renkerba4e58e2006-11-27 11:10:57 -08001068out_unregister_udplite_proto:
1069 proto_unregister(&udplitev6_prot);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001070out_unregister_udp_proto:
1071 proto_unregister(&udpv6_prot);
1072out_unregister_tcp_proto:
1073 proto_unregister(&tcpv6_prot);
1074 goto out;
1075}
1076module_init(inet6_init);
1077
1078static void __exit inet6_exit(void)
1079{
1080 /* First of all disallow new sockets creation. */
1081 sock_unregister(PF_INET6);
Thomas Grafc127ea22007-03-22 11:58:32 -07001082 /* Disallow any further netlink messages */
1083 rtnl_unregister_all(PF_INET6);
Joe Jinca17c232007-02-20 01:30:15 -08001084
Benjamin Thery94911fe2008-03-05 10:45:36 -08001085#ifdef CONFIG_SYSCTL
1086 ipv6_sysctl_unregister();
1087#endif
Daniel Lezcano7f4e4862007-12-11 02:25:35 -08001088 udpv6_exit();
1089 udplitev6_exit();
1090 tcpv6_exit();
1091
Joe Jinca17c232007-02-20 01:30:15 -08001092 /* Cleanup code parts. */
1093 ipv6_packet_cleanup();
Daniel Lezcano853cbba2007-12-11 02:24:29 -08001094 ipv6_frag_exit();
Daniel Lezcano248b2382007-12-11 02:23:54 -08001095 ipv6_exthdrs_exit();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001096 addrconf_cleanup();
Joe Jinca17c232007-02-20 01:30:15 -08001097 ip6_flowlabel_cleanup();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001098 ip6_route_cleanup();
Joe Jinca17c232007-02-20 01:30:15 -08001099#ifdef CONFIG_PROC_FS
1100
1101 /* Cleanup code parts. */
1102 if6_proc_exit();
Joe Jinca17c232007-02-20 01:30:15 -08001103 ipv6_misc_proc_exit();
1104 udplite6_proc_exit();
Joe Jinca17c232007-02-20 01:30:15 -08001105 raw6_proc_exit();
1106#endif
Harald Welte2cc7d572005-08-09 19:42:34 -07001107 ipv6_netfilter_fini();
Joe Jinca17c232007-02-20 01:30:15 -08001108 igmp6_cleanup();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001109 ndisc_cleanup();
Wang Chen623d1a12008-07-03 12:13:30 +08001110 ip6_mr_cleanup();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001111 icmpv6_cleanup();
Daniel Lezcano7f4e4862007-12-11 02:25:35 -08001112 rawv6_exit();
Benjamin Thery94911fe2008-03-05 10:45:36 -08001113
Daniel Lezcano81c1c172008-01-10 02:48:33 -08001114 unregister_pernet_subsys(&inet6_net_ops);
Al Viroeeb61f72008-07-27 08:59:33 +01001115#ifdef CONFIG_SYSCTL
1116 ipv6_static_sysctl_unregister();
1117#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001118 proto_unregister(&rawv6_prot);
Joe Jinca17c232007-02-20 01:30:15 -08001119 proto_unregister(&udplitev6_prot);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001120 proto_unregister(&udpv6_prot);
1121 proto_unregister(&tcpv6_prot);
1122}
1123module_exit(inet6_exit);
1124
1125MODULE_ALIAS_NETPROTO(PF_INET6);