blob: bf85d5f97032412294023a3acbdfb43cff63023c [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
Brian Haley56d417b2009-06-01 03:07:33 -070075struct ipv6_params ipv6_defaults = {
76 .disable_ipv6 = 0,
77 .autoconf = 1,
78};
79
80static int disable_ipv6_mod = 0;
81
82module_param_named(disable, disable_ipv6_mod, int, 0444);
83MODULE_PARM_DESC(disable, "Disable IPv6 module such that it is non-functional");
84
85module_param_named(disable_ipv6, ipv6_defaults.disable_ipv6, int, 0444);
86MODULE_PARM_DESC(disable_ipv6, "Disable IPv6 on all interfaces");
87
88module_param_named(autoconf, ipv6_defaults.autoconf, int, 0444);
89MODULE_PARM_DESC(autoconf, "Enable IPv6 address autoconfiguration on all interfaces");
Brian Haleyfe7ca2e2009-03-04 03:18:11 -080090
Linus Torvalds1da177e2005-04-16 15:20:36 -070091static __inline__ struct ipv6_pinfo *inet6_sk_generic(struct sock *sk)
92{
93 const int offset = sk->sk_prot->obj_size - sizeof(struct ipv6_pinfo);
94
95 return (struct ipv6_pinfo *)(((u8 *)sk) + offset);
96}
97
Eric W. Biederman1b8d7ae2007-10-08 23:24:22 -070098static int inet6_create(struct net *net, struct socket *sock, int protocol)
Linus Torvalds1da177e2005-04-16 15:20:36 -070099{
100 struct inet_sock *inet;
101 struct ipv6_pinfo *np;
102 struct sock *sk;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103 struct inet_protosw *answer;
104 struct proto *answer_prot;
105 unsigned char answer_flags;
106 char answer_no_check;
YOSHIFUJI Hideakiaf1afe82005-12-02 20:56:57 -0800107 int try_loading_module = 0;
108 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109
David S. Millerb3da2cf2007-03-23 11:40:27 -0700110 if (sock->type != SOCK_RAW &&
111 sock->type != SOCK_DGRAM &&
112 !inet_ehash_secret)
113 build_ehash_secret();
114
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115 /* Look for the requested type/protocol pair. */
YOSHIFUJI Hideakiaf1afe82005-12-02 20:56:57 -0800116lookup_protocol:
117 err = -ESOCKTNOSUPPORT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118 rcu_read_lock();
Paul E. McKenney696adfe2008-07-25 01:45:34 -0700119 list_for_each_entry_rcu(answer, &inetsw6[sock->type], list) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120
Paul E. McKenney696adfe2008-07-25 01:45:34 -0700121 err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122 /* Check the non-wild match. */
123 if (protocol == answer->protocol) {
124 if (protocol != IPPROTO_IP)
125 break;
126 } else {
127 /* Check for the two wild cases. */
128 if (IPPROTO_IP == protocol) {
129 protocol = answer->protocol;
130 break;
131 }
132 if (IPPROTO_IP == answer->protocol)
133 break;
134 }
YOSHIFUJI Hideakiaf1afe82005-12-02 20:56:57 -0800135 err = -EPROTONOSUPPORT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136 }
137
Paul E. McKenney696adfe2008-07-25 01:45:34 -0700138 if (err) {
YOSHIFUJI Hideakiaf1afe82005-12-02 20:56:57 -0800139 if (try_loading_module < 2) {
140 rcu_read_unlock();
141 /*
142 * Be more specific, e.g. net-pf-10-proto-132-type-1
143 * (net-pf-PF_INET6-proto-IPPROTO_SCTP-type-SOCK_STREAM)
144 */
145 if (++try_loading_module == 1)
146 request_module("net-pf-%d-proto-%d-type-%d",
147 PF_INET6, protocol, sock->type);
148 /*
149 * Fall back to generic, e.g. net-pf-10-proto-132
150 * (net-pf-PF_INET6-proto-IPPROTO_SCTP)
151 */
152 else
153 request_module("net-pf-%d-proto-%d",
154 PF_INET6, protocol);
155 goto lookup_protocol;
156 } else
157 goto out_rcu_unlock;
158 }
159
160 err = -EPERM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161 if (answer->capability > 0 && !capable(answer->capability))
162 goto out_rcu_unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163
164 sock->ops = answer->ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165 answer_prot = answer->prot;
166 answer_no_check = answer->no_check;
167 answer_flags = answer->flags;
168 rcu_read_unlock();
169
Ilpo Järvinen547b7922008-07-25 21:43:18 -0700170 WARN_ON(answer_prot->slab == NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171
YOSHIFUJI Hideakiaf1afe82005-12-02 20:56:57 -0800172 err = -ENOBUFS;
Pavel Emelyanov6257ff22007-11-01 00:39:31 -0700173 sk = sk_alloc(net, PF_INET6, GFP_KERNEL, answer_prot);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174 if (sk == NULL)
175 goto out;
176
177 sock_init_data(sock, sk);
178
YOSHIFUJI Hideakiaf1afe82005-12-02 20:56:57 -0800179 err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180 sk->sk_no_check = answer_no_check;
181 if (INET_PROTOSW_REUSE & answer_flags)
182 sk->sk_reuse = 1;
183
184 inet = inet_sk(sk);
Paul Moore469de9b2007-01-09 14:37:06 -0800185 inet->is_icsk = (INET_PROTOSW_ICSK & answer_flags) != 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186
187 if (SOCK_RAW == sock->type) {
188 inet->num = protocol;
189 if (IPPROTO_RAW == protocol)
190 inet->hdrincl = 1;
191 }
192
Arnaldo Carvalho de Meloe6848972005-08-09 19:45:38 -0700193 sk->sk_destruct = inet_sock_destruct;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194 sk->sk_family = PF_INET6;
195 sk->sk_protocol = protocol;
196
197 sk->sk_backlog_rcv = answer->prot->backlog_rcv;
198
199 inet_sk(sk)->pinet6 = np = inet6_sk_generic(sk);
200 np->hop_limit = -1;
201 np->mcast_hops = -1;
202 np->mc_loop = 1;
203 np->pmtudisc = IPV6_PMTUDISC_WANT;
Pavel Emelyanov2e761e02008-06-09 15:53:30 -0700204 np->ipv6only = net->ipv6.sysctl.bindv6only;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900205
Linus Torvalds1da177e2005-04-16 15:20:36 -0700206 /* Init the ipv4 part of the socket since we can have sockets
207 * using v6 API for ipv4.
208 */
209 inet->uc_ttl = -1;
210
211 inet->mc_loop = 1;
212 inet->mc_ttl = 1;
213 inet->mc_index = 0;
214 inet->mc_list = NULL;
215
216 if (ipv4_config.no_pmtu_disc)
217 inet->pmtudisc = IP_PMTUDISC_DONT;
218 else
219 inet->pmtudisc = IP_PMTUDISC_WANT;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900220 /*
Arnaldo Carvalho de Meloe6848972005-08-09 19:45:38 -0700221 * Increment only the relevant sk_prot->socks debug field, this changes
222 * the previous behaviour of incrementing both the equivalent to
223 * answer->prot->socks (inet6_sock_nr) and inet_sock_nr.
224 *
225 * This allows better debug granularity as we'll know exactly how many
226 * UDPv6, TCPv6, etc socks were allocated, not the sum of all IPv6
227 * transport protocol socks. -acme
228 */
229 sk_refcnt_debug_inc(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231 if (inet->num) {
232 /* It assumes that any protocol which allows
233 * the user to assign a number at socket
234 * creation time automatically shares.
235 */
Al Viroe69a4ad2006-11-14 20:56:00 -0800236 inet->sport = htons(inet->num);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237 sk->sk_prot->hash(sk);
238 }
239 if (sk->sk_prot->init) {
YOSHIFUJI Hideakiaf1afe82005-12-02 20:56:57 -0800240 err = sk->sk_prot->init(sk);
241 if (err) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242 sk_common_release(sk);
243 goto out;
244 }
245 }
246out:
YOSHIFUJI Hideakiaf1afe82005-12-02 20:56:57 -0800247 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248out_rcu_unlock:
249 rcu_read_unlock();
250 goto out;
251}
252
253
254/* bind for INET6 API */
255int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
256{
257 struct sockaddr_in6 *addr=(struct sockaddr_in6 *)uaddr;
258 struct sock *sk = sock->sk;
259 struct inet_sock *inet = inet_sk(sk);
260 struct ipv6_pinfo *np = inet6_sk(sk);
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +0900261 struct net *net = sock_net(sk);
Al Virofd683222006-09-26 22:17:51 -0700262 __be32 v4addr = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263 unsigned short snum;
264 int addr_type = 0;
265 int err = 0;
266
267 /* If the socket has its own bind function then use it. */
268 if (sk->sk_prot->bind)
269 return sk->sk_prot->bind(sk, uaddr, addr_len);
270
271 if (addr_len < SIN6_LEN_RFC2133)
272 return -EINVAL;
273 addr_type = ipv6_addr_type(&addr->sin6_addr);
274 if ((addr_type & IPV6_ADDR_MULTICAST) && sock->type == SOCK_STREAM)
275 return -EINVAL;
276
277 snum = ntohs(addr->sin6_port);
278 if (snum && snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
279 return -EACCES;
280
281 lock_sock(sk);
282
283 /* Check these errors (active socket, double bind). */
284 if (sk->sk_state != TCP_CLOSE || inet->num) {
285 err = -EINVAL;
286 goto out;
287 }
288
289 /* Check if the address belongs to the host. */
290 if (addr_type == IPV6_ADDR_MAPPED) {
Vlad Yasevich63d99502009-03-24 16:24:50 +0000291 int chk_addr_ret;
292
Vlad Yasevich783ed5a2009-03-24 16:24:48 +0000293 /* Binding to v4-mapped address on a v6-only socket
294 * makes no sense
295 */
296 if (np->ipv6only) {
297 err = -EINVAL;
298 goto out;
299 }
Vlad Yasevich63d99502009-03-24 16:24:50 +0000300
301 /* Reproduce AF_INET checks to make the bindings consitant */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700302 v4addr = addr->sin6_addr.s6_addr32[3];
Vlad Yasevich63d99502009-03-24 16:24:50 +0000303 chk_addr_ret = inet_addr_type(net, v4addr);
304 if (!sysctl_ip_nonlocal_bind &&
305 !(inet->freebind || inet->transparent) &&
306 v4addr != htonl(INADDR_ANY) &&
307 chk_addr_ret != RTN_LOCAL &&
308 chk_addr_ret != RTN_MULTICAST &&
309 chk_addr_ret != RTN_BROADCAST)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311 } else {
312 if (addr_type != IPV6_ADDR_ANY) {
313 struct net_device *dev = NULL;
314
315 if (addr_type & IPV6_ADDR_LINKLOCAL) {
316 if (addr_len >= sizeof(struct sockaddr_in6) &&
317 addr->sin6_scope_id) {
318 /* Override any existing binding, if another one
319 * is supplied by user.
320 */
321 sk->sk_bound_dev_if = addr->sin6_scope_id;
322 }
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900323
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324 /* Binding to link-local address requires an interface */
325 if (!sk->sk_bound_dev_if) {
326 err = -EINVAL;
327 goto out;
328 }
Benjamin Thery075de932008-03-05 10:45:59 -0800329 dev = dev_get_by_index(net, sk->sk_bound_dev_if);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330 if (!dev) {
331 err = -ENODEV;
332 goto out;
333 }
334 }
335
336 /* ipv4 addr of the socket is invalid. Only the
337 * unspecified and mapped address have a v4 equivalent.
338 */
339 v4addr = LOOPBACK4_IPV6;
340 if (!(addr_type & IPV6_ADDR_MULTICAST)) {
Benjamin Thery075de932008-03-05 10:45:59 -0800341 if (!ipv6_chk_addr(net, &addr->sin6_addr,
Daniel Lezcanobfeade02008-01-10 22:43:18 -0800342 dev, 0)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343 if (dev)
344 dev_put(dev);
345 err = -EADDRNOTAVAIL;
346 goto out;
347 }
348 }
349 if (dev)
350 dev_put(dev);
351 }
352 }
353
354 inet->rcv_saddr = v4addr;
355 inet->saddr = v4addr;
356
357 ipv6_addr_copy(&np->rcv_saddr, &addr->sin6_addr);
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900358
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359 if (!(addr_type & IPV6_ADDR_MULTICAST))
360 ipv6_addr_copy(&np->saddr, &addr->sin6_addr);
361
362 /* Make sure we are allowed to bind here. */
363 if (sk->sk_prot->get_port(sk, snum)) {
364 inet_reset_saddr(sk);
365 err = -EADDRINUSE;
366 goto out;
367 }
368
Vlad Yasevich0f8d3c72009-03-24 16:24:49 +0000369 if (addr_type != IPV6_ADDR_ANY) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370 sk->sk_userlocks |= SOCK_BINDADDR_LOCK;
Vlad Yasevich0f8d3c72009-03-24 16:24:49 +0000371 if (addr_type != IPV6_ADDR_MAPPED)
372 np->ipv6only = 1;
373 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374 if (snum)
375 sk->sk_userlocks |= SOCK_BINDPORT_LOCK;
Al Viroe69a4ad2006-11-14 20:56:00 -0800376 inet->sport = htons(inet->num);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377 inet->dport = 0;
378 inet->daddr = 0;
379out:
380 release_sock(sk);
381 return err;
382}
383
YOSHIFUJI Hideaki71590392007-02-22 22:05:40 +0900384EXPORT_SYMBOL(inet6_bind);
385
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386int inet6_release(struct socket *sock)
387{
388 struct sock *sk = sock->sk;
389
390 if (sk == NULL)
391 return -EINVAL;
392
393 /* Free mc lists */
394 ipv6_sock_mc_close(sk);
395
396 /* Free ac lists */
397 ipv6_sock_ac_close(sk);
398
399 return inet_release(sock);
400}
401
YOSHIFUJI Hideaki71590392007-02-22 22:05:40 +0900402EXPORT_SYMBOL(inet6_release);
403
Brian Haley7d06b2e2008-06-14 17:04:49 -0700404void inet6_destroy_sock(struct sock *sk)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405{
406 struct ipv6_pinfo *np = inet6_sk(sk);
407 struct sk_buff *skb;
408 struct ipv6_txoptions *opt;
409
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410 /* Release rx options */
411
412 if ((skb = xchg(&np->pktoptions, NULL)) != NULL)
413 kfree_skb(skb);
414
415 /* Free flowlabels */
416 fl6_free_socklist(sk);
417
418 /* Free tx options */
419
420 if ((opt = xchg(&np->opt, NULL)) != NULL)
421 sock_kfree_s(sk, opt, opt->tot_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700422}
423
Arnaldo Carvalho de Melo3cf3dc62005-12-13 23:23:20 -0800424EXPORT_SYMBOL_GPL(inet6_destroy_sock);
425
Linus Torvalds1da177e2005-04-16 15:20:36 -0700426/*
427 * This does both peername and sockname.
428 */
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900429
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
431 int *uaddr_len, int peer)
432{
433 struct sockaddr_in6 *sin=(struct sockaddr_in6 *)uaddr;
434 struct sock *sk = sock->sk;
435 struct inet_sock *inet = inet_sk(sk);
436 struct ipv6_pinfo *np = inet6_sk(sk);
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900437
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438 sin->sin6_family = AF_INET6;
439 sin->sin6_flowinfo = 0;
440 sin->sin6_scope_id = 0;
441 if (peer) {
442 if (!inet->dport)
443 return -ENOTCONN;
444 if (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) &&
445 peer == 1)
446 return -ENOTCONN;
447 sin->sin6_port = inet->dport;
448 ipv6_addr_copy(&sin->sin6_addr, &np->daddr);
449 if (np->sndflow)
450 sin->sin6_flowinfo = np->flow_label;
451 } else {
452 if (ipv6_addr_any(&np->rcv_saddr))
453 ipv6_addr_copy(&sin->sin6_addr, &np->saddr);
454 else
455 ipv6_addr_copy(&sin->sin6_addr, &np->rcv_saddr);
456
457 sin->sin6_port = inet->sport;
458 }
459 if (ipv6_addr_type(&sin->sin6_addr) & IPV6_ADDR_LINKLOCAL)
460 sin->sin6_scope_id = sk->sk_bound_dev_if;
461 *uaddr_len = sizeof(*sin);
462 return(0);
463}
464
YOSHIFUJI Hideaki71590392007-02-22 22:05:40 +0900465EXPORT_SYMBOL(inet6_getname);
466
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
468{
469 struct sock *sk = sock->sk;
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +0900470 struct net *net = sock_net(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900472 switch(cmd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473 {
474 case SIOCGSTAMP:
475 return sock_get_timestamp(sk, (struct timeval __user *)arg);
476
Eric Dumazetae40eb12007-03-18 17:33:16 -0700477 case SIOCGSTAMPNS:
478 return sock_get_timestampns(sk, (struct timespec __user *)arg);
479
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480 case SIOCADDRT:
481 case SIOCDELRT:
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900482
Daniel Lezcano55786892008-03-04 13:47:47 -0800483 return(ipv6_route_ioctl(net, cmd, (void __user *)arg));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700484
485 case SIOCSIFADDR:
Daniel Lezcanoaf284932008-03-05 10:46:57 -0800486 return addrconf_add_ifaddr(net, (void __user *) arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700487 case SIOCDIFADDR:
Daniel Lezcanoaf284932008-03-05 10:46:57 -0800488 return addrconf_del_ifaddr(net, (void __user *) arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489 case SIOCSIFDSTADDR:
Daniel Lezcanoaf284932008-03-05 10:46:57 -0800490 return addrconf_set_dstaddr(net, (void __user *) arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491 default:
Christoph Hellwigb5e5fa52006-01-03 14:18:33 -0800492 if (!sk->sk_prot->ioctl)
493 return -ENOIOCTLCMD;
494 return sk->sk_prot->ioctl(sk, cmd, arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495 }
496 /*NOTREACHED*/
497 return(0);
498}
499
YOSHIFUJI Hideaki71590392007-02-22 22:05:40 +0900500EXPORT_SYMBOL(inet6_ioctl);
501
Eric Dumazet90ddc4f2005-12-22 12:49:22 -0800502const struct proto_ops inet6_stream_ops = {
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800503 .family = PF_INET6,
504 .owner = THIS_MODULE,
505 .release = inet6_release,
506 .bind = inet6_bind,
507 .connect = inet_stream_connect, /* ok */
508 .socketpair = sock_no_socketpair, /* a do nothing */
509 .accept = inet_accept, /* ok */
510 .getname = inet6_getname,
511 .poll = tcp_poll, /* ok */
512 .ioctl = inet6_ioctl, /* must change */
513 .listen = inet_listen, /* ok */
514 .shutdown = inet_shutdown, /* ok */
515 .setsockopt = sock_common_setsockopt, /* ok */
516 .getsockopt = sock_common_getsockopt, /* ok */
David S. Miller3516ffb2007-08-02 19:23:56 -0700517 .sendmsg = tcp_sendmsg, /* ok */
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800518 .recvmsg = sock_common_recvmsg, /* ok */
519 .mmap = sock_no_mmap,
520 .sendpage = tcp_sendpage,
Jens Axboea0974dd2007-11-06 23:31:58 -0800521 .splice_read = tcp_splice_read,
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800522#ifdef CONFIG_COMPAT
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800523 .compat_setsockopt = compat_sock_common_setsockopt,
524 .compat_getsockopt = compat_sock_common_getsockopt,
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800525#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526};
527
Eric Dumazet90ddc4f2005-12-22 12:49:22 -0800528const struct proto_ops inet6_dgram_ops = {
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800529 .family = PF_INET6,
530 .owner = THIS_MODULE,
531 .release = inet6_release,
532 .bind = inet6_bind,
533 .connect = inet_dgram_connect, /* ok */
534 .socketpair = sock_no_socketpair, /* a do nothing */
535 .accept = sock_no_accept, /* a do nothing */
536 .getname = inet6_getname,
537 .poll = udp_poll, /* ok */
538 .ioctl = inet6_ioctl, /* must change */
539 .listen = sock_no_listen, /* ok */
540 .shutdown = inet_shutdown, /* ok */
541 .setsockopt = sock_common_setsockopt, /* ok */
542 .getsockopt = sock_common_getsockopt, /* ok */
543 .sendmsg = inet_sendmsg, /* ok */
544 .recvmsg = sock_common_recvmsg, /* ok */
545 .mmap = sock_no_mmap,
546 .sendpage = sock_no_sendpage,
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800547#ifdef CONFIG_COMPAT
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800548 .compat_setsockopt = compat_sock_common_setsockopt,
549 .compat_getsockopt = compat_sock_common_getsockopt,
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800550#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551};
552
553static struct net_proto_family inet6_family_ops = {
554 .family = PF_INET6,
555 .create = inet6_create,
556 .owner = THIS_MODULE,
557};
558
Daniel Lezcano87c3efb2007-12-11 02:25:01 -0800559int inet6_register_protosw(struct inet_protosw *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560{
561 struct list_head *lh;
562 struct inet_protosw *answer;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563 struct list_head *last_perm;
Daniel Lezcano87c3efb2007-12-11 02:25:01 -0800564 int protocol = p->protocol;
565 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566
567 spin_lock_bh(&inetsw6_lock);
568
Daniel Lezcano87c3efb2007-12-11 02:25:01 -0800569 ret = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700570 if (p->type >= SOCK_MAX)
571 goto out_illegal;
572
573 /* If we are trying to override a permanent protocol, bail. */
574 answer = NULL;
Daniel Lezcano87c3efb2007-12-11 02:25:01 -0800575 ret = -EPERM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700576 last_perm = &inetsw6[p->type];
577 list_for_each(lh, &inetsw6[p->type]) {
578 answer = list_entry(lh, struct inet_protosw, list);
579
580 /* Check only the non-wild match. */
581 if (INET_PROTOSW_PERMANENT & answer->flags) {
582 if (protocol == answer->protocol)
583 break;
584 last_perm = lh;
585 }
586
587 answer = NULL;
588 }
589 if (answer)
590 goto out_permanent;
591
592 /* Add the new entry after the last permanent entry if any, so that
593 * the new entry does not override a permanent entry when matched with
594 * a wild-card protocol. But it is allowed to override any existing
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900595 * non-permanent entry. This means that when we remove this entry, the
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596 * system automatically returns to the old behavior.
597 */
598 list_add_rcu(&p->list, last_perm);
Daniel Lezcano87c3efb2007-12-11 02:25:01 -0800599 ret = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700600out:
601 spin_unlock_bh(&inetsw6_lock);
Daniel Lezcano87c3efb2007-12-11 02:25:01 -0800602 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603
604out_permanent:
605 printk(KERN_ERR "Attempt to override permanent protocol %d.\n",
606 protocol);
607 goto out;
608
609out_illegal:
610 printk(KERN_ERR
611 "Ignoring attempt to register invalid socket type %d.\n",
612 p->type);
613 goto out;
614}
615
YOSHIFUJI Hideaki71590392007-02-22 22:05:40 +0900616EXPORT_SYMBOL(inet6_register_protosw);
617
Linus Torvalds1da177e2005-04-16 15:20:36 -0700618void
619inet6_unregister_protosw(struct inet_protosw *p)
620{
621 if (INET_PROTOSW_PERMANENT & p->flags) {
622 printk(KERN_ERR
623 "Attempt to unregister permanent protocol %d.\n",
624 p->protocol);
625 } else {
626 spin_lock_bh(&inetsw6_lock);
627 list_del_rcu(&p->list);
628 spin_unlock_bh(&inetsw6_lock);
629
630 synchronize_net();
631 }
632}
633
YOSHIFUJI Hideaki71590392007-02-22 22:05:40 +0900634EXPORT_SYMBOL(inet6_unregister_protosw);
635
Arnaldo Carvalho de Melob9750ce2005-12-13 23:22:54 -0800636int inet6_sk_rebuild_header(struct sock *sk)
637{
638 int err;
639 struct dst_entry *dst;
640 struct ipv6_pinfo *np = inet6_sk(sk);
641
642 dst = __sk_dst_check(sk, np->dst_cookie);
643
644 if (dst == NULL) {
645 struct inet_sock *inet = inet_sk(sk);
646 struct in6_addr *final_p = NULL, final;
647 struct flowi fl;
648
649 memset(&fl, 0, sizeof(fl));
650 fl.proto = sk->sk_protocol;
651 ipv6_addr_copy(&fl.fl6_dst, &np->daddr);
652 ipv6_addr_copy(&fl.fl6_src, &np->saddr);
653 fl.fl6_flowlabel = np->flow_label;
654 fl.oif = sk->sk_bound_dev_if;
655 fl.fl_ip_dport = inet->dport;
656 fl.fl_ip_sport = inet->sport;
Venkat Yekkiralabeb8d132006-08-04 23:12:42 -0700657 security_sk_classify_flow(sk, &fl);
Arnaldo Carvalho de Melob9750ce2005-12-13 23:22:54 -0800658
659 if (np->opt && np->opt->srcrt) {
660 struct rt0_hdr *rt0 = (struct rt0_hdr *) np->opt->srcrt;
661 ipv6_addr_copy(&final, &fl.fl6_dst);
662 ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
663 final_p = &final;
664 }
665
666 err = ip6_dst_lookup(sk, &dst, &fl);
667 if (err) {
668 sk->sk_route_caps = 0;
669 return err;
670 }
671 if (final_p)
672 ipv6_addr_copy(&fl.fl6_dst, final_p);
673
Alexey Dobriyan52479b62008-11-25 17:35:18 -0800674 if ((err = xfrm_lookup(sock_net(sk), &dst, &fl, sk, 0)) < 0) {
Arnaldo Carvalho de Melob9750ce2005-12-13 23:22:54 -0800675 sk->sk_err_soft = -err;
676 return err;
677 }
678
YOSHIFUJI Hideaki8e1ef0a2006-08-29 17:15:09 -0700679 __ip6_dst_store(sk, dst, NULL, NULL);
Arnaldo Carvalho de Melob9750ce2005-12-13 23:22:54 -0800680 }
681
682 return 0;
683}
684
685EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header);
686
Arnaldo Carvalho de Melo399c07d2005-12-13 23:24:28 -0800687int ipv6_opt_accepted(struct sock *sk, struct sk_buff *skb)
688{
689 struct ipv6_pinfo *np = inet6_sk(sk);
690 struct inet6_skb_parm *opt = IP6CB(skb);
691
692 if (np->rxopt.all) {
693 if ((opt->hop && (np->rxopt.bits.hopopts ||
694 np->rxopt.bits.ohopopts)) ||
Arnaldo Carvalho de Melod56f90a2007-04-10 20:50:43 -0700695 ((IPV6_FLOWINFO_MASK &
696 *(__be32 *)skb_network_header(skb)) &&
Arnaldo Carvalho de Melo399c07d2005-12-13 23:24:28 -0800697 np->rxopt.bits.rxflow) ||
698 (opt->srcrt && (np->rxopt.bits.srcrt ||
699 np->rxopt.bits.osrcrt)) ||
700 ((opt->dst1 || opt->dst0) &&
701 (np->rxopt.bits.dstopts || np->rxopt.bits.odstopts)))
702 return 1;
703 }
704 return 0;
705}
706
707EXPORT_SYMBOL_GPL(ipv6_opt_accepted);
708
Herbert Xu787e9202009-01-08 10:40:57 -0800709static int ipv6_gso_pull_exthdrs(struct sk_buff *skb, int proto)
YOSHIFUJI Hideaki662397f2008-02-27 23:14:03 +0900710{
711 struct inet6_protocol *ops = NULL;
712
713 for (;;) {
714 struct ipv6_opt_hdr *opth;
715 int len;
716
717 if (proto != NEXTHDR_HOP) {
718 ops = rcu_dereference(inet6_protos[proto]);
719
720 if (unlikely(!ops))
721 break;
722
723 if (!(ops->flags & INET6_PROTO_GSO_EXTHDR))
724 break;
725 }
726
727 if (unlikely(!pskb_may_pull(skb, 8)))
728 break;
729
730 opth = (void *)skb->data;
731 len = ipv6_optlen(opth);
732
733 if (unlikely(!pskb_may_pull(skb, len)))
734 break;
735
736 proto = opth->nexthdr;
737 __skb_pull(skb, len);
738 }
739
Herbert Xu787e9202009-01-08 10:40:57 -0800740 return proto;
YOSHIFUJI Hideaki662397f2008-02-27 23:14:03 +0900741}
742
743static int ipv6_gso_send_check(struct sk_buff *skb)
744{
745 struct ipv6hdr *ipv6h;
746 struct inet6_protocol *ops;
747 int err = -EINVAL;
748
749 if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h))))
750 goto out;
751
752 ipv6h = ipv6_hdr(skb);
753 __skb_pull(skb, sizeof(*ipv6h));
754 err = -EPROTONOSUPPORT;
755
756 rcu_read_lock();
Herbert Xu787e9202009-01-08 10:40:57 -0800757 ops = rcu_dereference(inet6_protos[
758 ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr)]);
759
YOSHIFUJI Hideaki662397f2008-02-27 23:14:03 +0900760 if (likely(ops && ops->gso_send_check)) {
761 skb_reset_transport_header(skb);
762 err = ops->gso_send_check(skb);
763 }
764 rcu_read_unlock();
765
766out:
767 return err;
768}
769
770static struct sk_buff *ipv6_gso_segment(struct sk_buff *skb, int features)
771{
772 struct sk_buff *segs = ERR_PTR(-EINVAL);
773 struct ipv6hdr *ipv6h;
774 struct inet6_protocol *ops;
Sridhar Samudralaba735422009-07-09 08:10:04 +0000775 int proto;
776 struct frag_hdr *fptr;
777 unsigned int unfrag_ip6hlen;
778 u8 *prevhdr;
779 int offset = 0;
YOSHIFUJI Hideaki662397f2008-02-27 23:14:03 +0900780
781 if (!(features & NETIF_F_V6_CSUM))
782 features &= ~NETIF_F_SG;
783
784 if (unlikely(skb_shinfo(skb)->gso_type &
785 ~(SKB_GSO_UDP |
786 SKB_GSO_DODGY |
787 SKB_GSO_TCP_ECN |
788 SKB_GSO_TCPV6 |
789 0)))
790 goto out;
791
792 if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h))))
793 goto out;
794
795 ipv6h = ipv6_hdr(skb);
796 __skb_pull(skb, sizeof(*ipv6h));
797 segs = ERR_PTR(-EPROTONOSUPPORT);
798
Sridhar Samudralaba735422009-07-09 08:10:04 +0000799 proto = ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr);
YOSHIFUJI Hideaki662397f2008-02-27 23:14:03 +0900800 rcu_read_lock();
Sridhar Samudralaba735422009-07-09 08:10:04 +0000801 ops = rcu_dereference(inet6_protos[proto]);
YOSHIFUJI Hideaki662397f2008-02-27 23:14:03 +0900802 if (likely(ops && ops->gso_segment)) {
803 skb_reset_transport_header(skb);
804 segs = ops->gso_segment(skb, features);
805 }
806 rcu_read_unlock();
807
808 if (unlikely(IS_ERR(segs)))
809 goto out;
810
811 for (skb = segs; skb; skb = skb->next) {
812 ipv6h = ipv6_hdr(skb);
813 ipv6h->payload_len = htons(skb->len - skb->mac_len -
814 sizeof(*ipv6h));
Sridhar Samudralaba735422009-07-09 08:10:04 +0000815 if (proto == IPPROTO_UDP) {
816 unfrag_ip6hlen = ip6_find_1stfragopt(skb, &prevhdr);
817 fptr = (struct frag_hdr *)(skb_network_header(skb) +
818 unfrag_ip6hlen);
819 fptr->frag_off = htons(offset);
820 if (skb->next != NULL)
821 fptr->frag_off |= htons(IP6_MF);
822 offset += (ntohs(ipv6h->payload_len) -
823 sizeof(struct frag_hdr));
824 }
YOSHIFUJI Hideaki662397f2008-02-27 23:14:03 +0900825 }
826
827out:
828 return segs;
829}
830
Herbert Xu787e9202009-01-08 10:40:57 -0800831struct ipv6_gro_cb {
832 struct napi_gro_cb napi;
833 int proto;
834};
835
836#define IPV6_GRO_CB(skb) ((struct ipv6_gro_cb *)(skb)->cb)
837
838static struct sk_buff **ipv6_gro_receive(struct sk_buff **head,
839 struct sk_buff *skb)
840{
841 struct inet6_protocol *ops;
842 struct sk_buff **pp = NULL;
843 struct sk_buff *p;
844 struct ipv6hdr *iph;
845 unsigned int nlen;
Herbert Xua5b1cf22009-05-26 18:50:28 +0000846 unsigned int hlen;
847 unsigned int off;
Herbert Xu787e9202009-01-08 10:40:57 -0800848 int flush = 1;
849 int proto;
Herbert Xuebad18e2009-01-17 19:46:16 +0000850 __wsum csum;
Herbert Xu787e9202009-01-08 10:40:57 -0800851
Herbert Xua5b1cf22009-05-26 18:50:28 +0000852 off = skb_gro_offset(skb);
853 hlen = off + sizeof(*iph);
854 iph = skb_gro_header_fast(skb, off);
855 if (skb_gro_header_hard(skb, hlen)) {
856 iph = skb_gro_header_slow(skb, hlen, off);
857 if (unlikely(!iph))
858 goto out;
859 }
Herbert Xu787e9202009-01-08 10:40:57 -0800860
Herbert Xu86911732009-01-29 14:19:50 +0000861 skb_gro_pull(skb, sizeof(*iph));
862 skb_set_transport_header(skb, skb_gro_offset(skb));
Herbert Xu787e9202009-01-08 10:40:57 -0800863
Herbert Xu86911732009-01-29 14:19:50 +0000864 flush += ntohs(iph->payload_len) != skb_gro_len(skb);
Herbert Xu787e9202009-01-08 10:40:57 -0800865
866 rcu_read_lock();
Herbert Xu86911732009-01-29 14:19:50 +0000867 proto = iph->nexthdr;
Herbert Xu787e9202009-01-08 10:40:57 -0800868 ops = rcu_dereference(inet6_protos[proto]);
Herbert Xu86911732009-01-29 14:19:50 +0000869 if (!ops || !ops->gro_receive) {
870 __pskb_pull(skb, skb_gro_offset(skb));
871 proto = ipv6_gso_pull_exthdrs(skb, proto);
872 skb_gro_pull(skb, -skb_transport_offset(skb));
873 skb_reset_transport_header(skb);
874 __skb_push(skb, skb_gro_offset(skb));
875
876 if (!ops || !ops->gro_receive)
877 goto out_unlock;
878
879 iph = ipv6_hdr(skb);
880 }
881
882 IPV6_GRO_CB(skb)->proto = proto;
Herbert Xu787e9202009-01-08 10:40:57 -0800883
884 flush--;
Herbert Xu787e9202009-01-08 10:40:57 -0800885 nlen = skb_network_header_len(skb);
886
887 for (p = *head; p; p = p->next) {
888 struct ipv6hdr *iph2;
889
890 if (!NAPI_GRO_CB(p)->same_flow)
891 continue;
892
893 iph2 = ipv6_hdr(p);
894
895 /* All fields must match except length. */
896 if (nlen != skb_network_header_len(p) ||
897 memcmp(iph, iph2, offsetof(struct ipv6hdr, payload_len)) ||
898 memcmp(&iph->nexthdr, &iph2->nexthdr,
899 nlen - offsetof(struct ipv6hdr, nexthdr))) {
900 NAPI_GRO_CB(p)->same_flow = 0;
901 continue;
902 }
903
904 NAPI_GRO_CB(p)->flush |= flush;
905 }
906
907 NAPI_GRO_CB(skb)->flush |= flush;
908
Herbert Xuebad18e2009-01-17 19:46:16 +0000909 csum = skb->csum;
910 skb_postpull_rcsum(skb, iph, skb_network_header_len(skb));
911
Herbert Xu787e9202009-01-08 10:40:57 -0800912 pp = ops->gro_receive(head, skb);
913
Herbert Xuebad18e2009-01-17 19:46:16 +0000914 skb->csum = csum;
915
Herbert Xu787e9202009-01-08 10:40:57 -0800916out_unlock:
917 rcu_read_unlock();
918
919out:
920 NAPI_GRO_CB(skb)->flush |= flush;
921
922 return pp;
923}
924
925static int ipv6_gro_complete(struct sk_buff *skb)
926{
927 struct inet6_protocol *ops;
928 struct ipv6hdr *iph = ipv6_hdr(skb);
929 int err = -ENOSYS;
930
931 iph->payload_len = htons(skb->len - skb_network_offset(skb) -
932 sizeof(*iph));
933
934 rcu_read_lock();
935 ops = rcu_dereference(inet6_protos[IPV6_GRO_CB(skb)->proto]);
936 if (WARN_ON(!ops || !ops->gro_complete))
937 goto out_unlock;
938
939 err = ops->gro_complete(skb);
940
941out_unlock:
942 rcu_read_unlock();
943
944 return err;
945}
946
Stephen Hemminger7546dd92009-03-09 08:18:29 +0000947static struct packet_type ipv6_packet_type __read_mostly = {
Harvey Harrison09640e62009-02-01 00:45:17 -0800948 .type = cpu_to_be16(ETH_P_IPV6),
YOSHIFUJI Hideaki662397f2008-02-27 23:14:03 +0900949 .func = ipv6_rcv,
950 .gso_send_check = ipv6_gso_send_check,
951 .gso_segment = ipv6_gso_segment,
Herbert Xu787e9202009-01-08 10:40:57 -0800952 .gro_receive = ipv6_gro_receive,
953 .gro_complete = ipv6_gro_complete,
YOSHIFUJI Hideaki662397f2008-02-27 23:14:03 +0900954};
955
956static int __init ipv6_packet_init(void)
957{
958 dev_add_pack(&ipv6_packet_type);
959 return 0;
960}
961
962static void ipv6_packet_cleanup(void)
963{
964 dev_remove_pack(&ipv6_packet_type);
965}
966
Denis V. Luneve43291c2008-10-07 14:48:53 -0700967static int __net_init ipv6_init_mibs(struct net *net)
968{
Denis V. Lunev0c7ed672008-10-07 14:49:36 -0700969 if (snmp_mib_init((void **)net->mib.udp_stats_in6,
970 sizeof (struct udp_mib)) < 0)
971 return -ENOMEM;
Denis V. Lunevbe713a42008-10-07 14:50:06 -0700972 if (snmp_mib_init((void **)net->mib.udplite_stats_in6,
973 sizeof (struct udp_mib)) < 0)
974 goto err_udplite_mib;
Denis V. Lunev9261e532008-10-08 10:36:03 -0700975 if (snmp_mib_init((void **)net->mib.ipv6_statistics,
976 sizeof(struct ipstats_mib)) < 0)
977 goto err_ip_mib;
978 if (snmp_mib_init((void **)net->mib.icmpv6_statistics,
979 sizeof(struct icmpv6_mib)) < 0)
980 goto err_icmp_mib;
981 if (snmp_mib_init((void **)net->mib.icmpv6msg_statistics,
982 sizeof(struct icmpv6msg_mib)) < 0)
983 goto err_icmpmsg_mib;
Denis V. Luneve43291c2008-10-07 14:48:53 -0700984 return 0;
Denis V. Lunevbe713a42008-10-07 14:50:06 -0700985
Denis V. Lunev9261e532008-10-08 10:36:03 -0700986err_icmpmsg_mib:
987 snmp_mib_free((void **)net->mib.icmpv6_statistics);
988err_icmp_mib:
989 snmp_mib_free((void **)net->mib.ipv6_statistics);
990err_ip_mib:
991 snmp_mib_free((void **)net->mib.udplite_stats_in6);
Denis V. Lunevbe713a42008-10-07 14:50:06 -0700992err_udplite_mib:
993 snmp_mib_free((void **)net->mib.udp_stats_in6);
994 return -ENOMEM;
Denis V. Luneve43291c2008-10-07 14:48:53 -0700995}
996
997static void __net_exit ipv6_cleanup_mibs(struct net *net)
998{
Denis V. Lunev0c7ed672008-10-07 14:49:36 -0700999 snmp_mib_free((void **)net->mib.udp_stats_in6);
Denis V. Lunevbe713a42008-10-07 14:50:06 -07001000 snmp_mib_free((void **)net->mib.udplite_stats_in6);
Denis V. Lunev9261e532008-10-08 10:36:03 -07001001 snmp_mib_free((void **)net->mib.ipv6_statistics);
1002 snmp_mib_free((void **)net->mib.icmpv6_statistics);
1003 snmp_mib_free((void **)net->mib.icmpv6msg_statistics);
Denis V. Luneve43291c2008-10-07 14:48:53 -07001004}
1005
Alexey Dobriyane7dc8492008-10-13 18:54:07 -07001006static int __net_init inet6_net_init(struct net *net)
Daniel Lezcano81c1c172008-01-10 02:48:33 -08001007{
Daniel Lezcano0c96d8c2008-03-21 04:14:17 -07001008 int err = 0;
1009
Daniel Lezcano99bc9c42008-01-10 02:54:53 -08001010 net->ipv6.sysctl.bindv6only = 0;
Daniel Lezcano41a76902008-01-10 03:02:40 -08001011 net->ipv6.sysctl.icmpv6_time = 1*HZ;
Daniel Lezcanoe71e0342008-01-10 02:56:03 -08001012
Denis V. Luneve43291c2008-10-07 14:48:53 -07001013 err = ipv6_init_mibs(net);
1014 if (err)
1015 return err;
Daniel Lezcano0c96d8c2008-03-21 04:14:17 -07001016#ifdef CONFIG_PROC_FS
1017 err = udp6_proc_init(net);
1018 if (err)
1019 goto out;
Daniel Lezcano6f8b13b2008-03-21 04:14:45 -07001020 err = tcp6_proc_init(net);
1021 if (err)
1022 goto proc_tcp6_fail;
Daniel Lezcano6ab57e72008-03-26 16:52:32 -07001023 err = ac6_proc_init(net);
1024 if (err)
1025 goto proc_ac6_fail;
Daniel Lezcano0c96d8c2008-03-21 04:14:17 -07001026#endif
1027 return err;
Daniel Lezcano6f8b13b2008-03-21 04:14:45 -07001028
1029#ifdef CONFIG_PROC_FS
Daniel Lezcano6ab57e72008-03-26 16:52:32 -07001030proc_ac6_fail:
1031 tcp6_proc_exit(net);
Daniel Lezcano6f8b13b2008-03-21 04:14:45 -07001032proc_tcp6_fail:
1033 udp6_proc_exit(net);
Denis V. Luneve43291c2008-10-07 14:48:53 -07001034out:
1035 ipv6_cleanup_mibs(net);
1036 return err;
Daniel Lezcano6f8b13b2008-03-21 04:14:45 -07001037#endif
Daniel Lezcano81c1c172008-01-10 02:48:33 -08001038}
1039
1040static void inet6_net_exit(struct net *net)
1041{
Daniel Lezcano0c96d8c2008-03-21 04:14:17 -07001042#ifdef CONFIG_PROC_FS
1043 udp6_proc_exit(net);
Daniel Lezcano6f8b13b2008-03-21 04:14:45 -07001044 tcp6_proc_exit(net);
Daniel Lezcano6ab57e72008-03-26 16:52:32 -07001045 ac6_proc_exit(net);
Daniel Lezcano0c96d8c2008-03-21 04:14:17 -07001046#endif
Denis V. Luneve43291c2008-10-07 14:48:53 -07001047 ipv6_cleanup_mibs(net);
Daniel Lezcano81c1c172008-01-10 02:48:33 -08001048}
1049
1050static struct pernet_operations inet6_net_ops = {
1051 .init = inet6_net_init,
1052 .exit = inet6_net_exit,
1053};
1054
Linus Torvalds1da177e2005-04-16 15:20:36 -07001055static int __init inet6_init(void)
1056{
1057 struct sk_buff *dummy_skb;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +09001058 struct list_head *r;
Brian Haleyfe7ca2e2009-03-04 03:18:11 -08001059 int err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001060
YOSHIFUJI Hideakief047f52006-09-01 00:29:06 -07001061 BUILD_BUG_ON(sizeof(struct inet6_skb_parm) > sizeof(dummy_skb->cb));
1062
Brian Haleyfe7ca2e2009-03-04 03:18:11 -08001063 /* Register the socket-side information for inet6_create. */
1064 for(r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r)
1065 INIT_LIST_HEAD(r);
1066
Brian Haley56d417b2009-06-01 03:07:33 -07001067 if (disable_ipv6_mod) {
Brian Haleyfe7ca2e2009-03-04 03:18:11 -08001068 printk(KERN_INFO
1069 "IPv6: Loaded, but administratively disabled, "
1070 "reboot required to enable\n");
1071 goto out;
1072 }
1073
Linus Torvalds1da177e2005-04-16 15:20:36 -07001074 err = proto_register(&tcpv6_prot, 1);
1075 if (err)
1076 goto out;
1077
1078 err = proto_register(&udpv6_prot, 1);
1079 if (err)
1080 goto out_unregister_tcp_proto;
1081
Gerrit Renkerba4e58e2006-11-27 11:10:57 -08001082 err = proto_register(&udplitev6_prot, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001083 if (err)
1084 goto out_unregister_udp_proto;
1085
Gerrit Renkerba4e58e2006-11-27 11:10:57 -08001086 err = proto_register(&rawv6_prot, 1);
1087 if (err)
1088 goto out_unregister_udplite_proto;
1089
Linus Torvalds1da177e2005-04-16 15:20:36 -07001090
Linus Torvalds1da177e2005-04-16 15:20:36 -07001091 /* We MUST register RAW sockets before we create the ICMP6,
1092 * IGMP6, or NDISC control sockets.
1093 */
Daniel Lezcano7f4e4862007-12-11 02:25:35 -08001094 err = rawv6_init();
1095 if (err)
1096 goto out_unregister_raw_proto;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001097
1098 /* Register the family here so that the init calls below will
1099 * be able to create sockets. (?? is this dangerous ??)
1100 */
David S. Miller8eb55912005-11-11 15:05:47 -08001101 err = sock_register(&inet6_family_ops);
1102 if (err)
Daniel Lezcano7f4e4862007-12-11 02:25:35 -08001103 goto out_sock_register_fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001104
Al Viroeeb61f72008-07-27 08:59:33 +01001105#ifdef CONFIG_SYSCTL
1106 err = ipv6_static_sysctl_register();
1107 if (err)
1108 goto static_sysctl_fail;
1109#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001110 /*
1111 * ipngwg API draft makes clear that the correct semantics
1112 * for TCP and UDP is to consider one TCP and UDP instance
1113 * in a host availiable by both INET and INET6 APIs and
1114 * able to communicate via both network protocols.
1115 */
1116
Daniel Lezcano81c1c172008-01-10 02:48:33 -08001117 err = register_pernet_subsys(&inet6_net_ops);
1118 if (err)
1119 goto register_pernet_fail;
Denis V. Lunev9b0f9762008-02-29 11:13:15 -08001120 err = icmpv6_init();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001121 if (err)
1122 goto icmp_fail;
Wang Chen623d1a12008-07-03 12:13:30 +08001123 err = ip6_mr_init();
1124 if (err)
1125 goto ipmr_fail;
Denis V. Lunev9b0f9762008-02-29 11:13:15 -08001126 err = ndisc_init();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001127 if (err)
1128 goto ndisc_fail;
Denis V. Lunev9b0f9762008-02-29 11:13:15 -08001129 err = igmp6_init();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001130 if (err)
1131 goto igmp_fail;
Harald Welte2cc7d572005-08-09 19:42:34 -07001132 err = ipv6_netfilter_init();
1133 if (err)
1134 goto netfilter_fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001135 /* Create /proc/foo6 entries. */
1136#ifdef CONFIG_PROC_FS
1137 err = -ENOMEM;
1138 if (raw6_proc_init())
1139 goto proc_raw6_fail;
Gerrit Renkerba4e58e2006-11-27 11:10:57 -08001140 if (udplite6_proc_init())
1141 goto proc_udplite6_fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001142 if (ipv6_misc_proc_init())
1143 goto proc_misc6_fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001144 if (if6_proc_init())
1145 goto proc_if6_fail;
1146#endif
Daniel Lezcanoe2fddf52007-12-07 00:44:29 -08001147 err = ip6_route_init();
1148 if (err)
1149 goto ip6_route_fail;
Daniel Lezcano0a3e78a2007-12-11 02:23:18 -08001150 err = ip6_flowlabel_init();
1151 if (err)
1152 goto ip6_flowlabel_fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001153 err = addrconf_init();
1154 if (err)
1155 goto addrconf_fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001156
1157 /* Init v6 extension headers. */
Daniel Lezcano248b2382007-12-11 02:23:54 -08001158 err = ipv6_exthdrs_init();
1159 if (err)
1160 goto ipv6_exthdrs_fail;
1161
Daniel Lezcano853cbba2007-12-11 02:24:29 -08001162 err = ipv6_frag_init();
1163 if (err)
1164 goto ipv6_frag_fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001165
1166 /* Init v6 transport protocols. */
Daniel Lezcano7f4e4862007-12-11 02:25:35 -08001167 err = udpv6_init();
1168 if (err)
1169 goto udpv6_fail;
Herbert Xue2ed4052005-07-05 14:41:20 -07001170
Daniel Lezcano7f4e4862007-12-11 02:25:35 -08001171 err = udplitev6_init();
1172 if (err)
1173 goto udplitev6_fail;
1174
1175 err = tcpv6_init();
1176 if (err)
1177 goto tcpv6_fail;
1178
1179 err = ipv6_packet_init();
1180 if (err)
1181 goto ipv6_packet_fail;
Benjamin Thery94911fe2008-03-05 10:45:36 -08001182
1183#ifdef CONFIG_SYSCTL
1184 err = ipv6_sysctl_register();
1185 if (err)
1186 goto sysctl_fail;
1187#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001188out:
1189 return err;
1190
Benjamin Thery94911fe2008-03-05 10:45:36 -08001191#ifdef CONFIG_SYSCTL
1192sysctl_fail:
1193 ipv6_packet_cleanup();
1194#endif
Daniel Lezcano7f4e4862007-12-11 02:25:35 -08001195ipv6_packet_fail:
1196 tcpv6_exit();
1197tcpv6_fail:
1198 udplitev6_exit();
1199udplitev6_fail:
1200 udpv6_exit();
1201udpv6_fail:
1202 ipv6_frag_exit();
Daniel Lezcano853cbba2007-12-11 02:24:29 -08001203ipv6_frag_fail:
1204 ipv6_exthdrs_exit();
Daniel Lezcano248b2382007-12-11 02:23:54 -08001205ipv6_exthdrs_fail:
1206 addrconf_cleanup();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001207addrconf_fail:
1208 ip6_flowlabel_cleanup();
Daniel Lezcano0a3e78a2007-12-11 02:23:18 -08001209ip6_flowlabel_fail:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001210 ip6_route_cleanup();
Daniel Lezcanoe2fddf52007-12-07 00:44:29 -08001211ip6_route_fail:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001212#ifdef CONFIG_PROC_FS
1213 if6_proc_exit();
1214proc_if6_fail:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001215 ipv6_misc_proc_exit();
1216proc_misc6_fail:
Gerrit Renkerba4e58e2006-11-27 11:10:57 -08001217 udplite6_proc_exit();
1218proc_udplite6_fail:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001219 raw6_proc_exit();
1220proc_raw6_fail:
1221#endif
Harald Welte2cc7d572005-08-09 19:42:34 -07001222 ipv6_netfilter_fini();
1223netfilter_fail:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001224 igmp6_cleanup();
1225igmp_fail:
1226 ndisc_cleanup();
1227ndisc_fail:
Wang Chen623d1a12008-07-03 12:13:30 +08001228 ip6_mr_cleanup();
1229ipmr_fail:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001230 icmpv6_cleanup();
1231icmp_fail:
Daniel Lezcano81c1c172008-01-10 02:48:33 -08001232 unregister_pernet_subsys(&inet6_net_ops);
1233register_pernet_fail:
Al Viroeeb61f72008-07-27 08:59:33 +01001234#ifdef CONFIG_SYSCTL
1235 ipv6_static_sysctl_unregister();
1236static_sysctl_fail:
1237#endif
David S. Miller8eb55912005-11-11 15:05:47 -08001238 sock_unregister(PF_INET6);
Daniel Lezcanoe2fddf52007-12-07 00:44:29 -08001239 rtnl_unregister_all(PF_INET6);
Daniel Lezcano7f4e4862007-12-11 02:25:35 -08001240out_sock_register_fail:
1241 rawv6_exit();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001242out_unregister_raw_proto:
1243 proto_unregister(&rawv6_prot);
Gerrit Renkerba4e58e2006-11-27 11:10:57 -08001244out_unregister_udplite_proto:
1245 proto_unregister(&udplitev6_prot);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001246out_unregister_udp_proto:
1247 proto_unregister(&udpv6_prot);
1248out_unregister_tcp_proto:
1249 proto_unregister(&tcpv6_prot);
1250 goto out;
1251}
1252module_init(inet6_init);
1253
1254static void __exit inet6_exit(void)
1255{
Brian Haley56d417b2009-06-01 03:07:33 -07001256 if (disable_ipv6_mod)
John Dykstraff8cf9a2009-03-11 09:22:51 -07001257 return;
1258
Linus Torvalds1da177e2005-04-16 15:20:36 -07001259 /* First of all disallow new sockets creation. */
1260 sock_unregister(PF_INET6);
Thomas Grafc127ea22007-03-22 11:58:32 -07001261 /* Disallow any further netlink messages */
1262 rtnl_unregister_all(PF_INET6);
Joe Jinca17c232007-02-20 01:30:15 -08001263
Benjamin Thery94911fe2008-03-05 10:45:36 -08001264#ifdef CONFIG_SYSCTL
1265 ipv6_sysctl_unregister();
1266#endif
Daniel Lezcano7f4e4862007-12-11 02:25:35 -08001267 udpv6_exit();
1268 udplitev6_exit();
1269 tcpv6_exit();
1270
Joe Jinca17c232007-02-20 01:30:15 -08001271 /* Cleanup code parts. */
1272 ipv6_packet_cleanup();
Daniel Lezcano853cbba2007-12-11 02:24:29 -08001273 ipv6_frag_exit();
Daniel Lezcano248b2382007-12-11 02:23:54 -08001274 ipv6_exthdrs_exit();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001275 addrconf_cleanup();
Joe Jinca17c232007-02-20 01:30:15 -08001276 ip6_flowlabel_cleanup();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001277 ip6_route_cleanup();
Joe Jinca17c232007-02-20 01:30:15 -08001278#ifdef CONFIG_PROC_FS
1279
1280 /* Cleanup code parts. */
1281 if6_proc_exit();
Joe Jinca17c232007-02-20 01:30:15 -08001282 ipv6_misc_proc_exit();
1283 udplite6_proc_exit();
Joe Jinca17c232007-02-20 01:30:15 -08001284 raw6_proc_exit();
1285#endif
Harald Welte2cc7d572005-08-09 19:42:34 -07001286 ipv6_netfilter_fini();
Joe Jinca17c232007-02-20 01:30:15 -08001287 igmp6_cleanup();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001288 ndisc_cleanup();
Wang Chen623d1a12008-07-03 12:13:30 +08001289 ip6_mr_cleanup();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001290 icmpv6_cleanup();
Daniel Lezcano7f4e4862007-12-11 02:25:35 -08001291 rawv6_exit();
Benjamin Thery94911fe2008-03-05 10:45:36 -08001292
Daniel Lezcano81c1c172008-01-10 02:48:33 -08001293 unregister_pernet_subsys(&inet6_net_ops);
Al Viroeeb61f72008-07-27 08:59:33 +01001294#ifdef CONFIG_SYSCTL
1295 ipv6_static_sysctl_unregister();
1296#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001297 proto_unregister(&rawv6_prot);
Joe Jinca17c232007-02-20 01:30:15 -08001298 proto_unregister(&udplitev6_prot);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001299 proto_unregister(&udpv6_prot);
1300 proto_unregister(&tcpv6_prot);
Jesper Dangaard Brouer1f2ccd02009-06-26 10:46:03 +00001301
1302 rcu_barrier(); /* Wait for completion of call_rcu()'s */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001303}
1304module_exit(inet6_exit);
1305
1306MODULE_ALIAS_NETPROTO(PF_INET6);