blob: b043c60429bd45529111d56893dac55aae91427a [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
Joe Perchesf3213832012-05-15 14:11:53 +000021#define pr_fmt(fmt) "IPv6: " fmt
Linus Torvalds1da177e2005-04-16 15:20:36 -070022
23#include <linux/module.h>
Randy Dunlap4fc268d2006-01-11 12:17:47 -080024#include <linux/capability.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070025#include <linux/errno.h>
26#include <linux/types.h>
27#include <linux/socket.h>
28#include <linux/in.h>
29#include <linux/kernel.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070030#include <linux/timer.h>
31#include <linux/string.h>
32#include <linux/sockios.h>
33#include <linux/net.h>
34#include <linux/fcntl.h>
35#include <linux/mm.h>
36#include <linux/interrupt.h>
37#include <linux/proc_fs.h>
38#include <linux/stat.h>
39#include <linux/init.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090040#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070041
42#include <linux/inet.h>
43#include <linux/netdevice.h>
44#include <linux/icmpv6.h>
Harald Welte2cc7d572005-08-09 19:42:34 -070045#include <linux/netfilter_ipv6.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070046
47#include <net/ip.h>
48#include <net/ipv6.h>
49#include <net/udp.h>
Gerrit Renkerba4e58e2006-11-27 11:10:57 -080050#include <net/udplite.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070051#include <net/tcp.h>
52#include <net/ipip.h>
53#include <net/protocol.h>
54#include <net/inet_common.h>
KOVACS Krisztian1668e012008-10-01 07:33:10 -070055#include <net/route.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070056#include <net/transp_v6.h>
57#include <net/ip6_route.h>
58#include <net/addrconf.h>
59#ifdef CONFIG_IPV6_TUNNEL
60#include <net/ip6_tunnel.h>
61#endif
62
63#include <asm/uaccess.h>
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +090064#include <linux/mroute6.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070065
66MODULE_AUTHOR("Cast of dozens");
67MODULE_DESCRIPTION("IPv6 protocol stack for Linux");
68MODULE_LICENSE("GPL");
69
Pavel Emelyanovf1267342007-11-23 21:28:44 +080070/* The inetsw6 table contains everything that inet6_create needs to
Linus Torvalds1da177e2005-04-16 15:20:36 -070071 * build a new socket.
72 */
73static struct list_head inetsw6[SOCK_MAX];
74static DEFINE_SPINLOCK(inetsw6_lock);
75
Brian Haley56d417b2009-06-01 03:07:33 -070076struct ipv6_params ipv6_defaults = {
77 .disable_ipv6 = 0,
78 .autoconf = 1,
79};
80
Eldad Zack647c0c72012-05-05 10:13:53 +000081static int disable_ipv6_mod;
Brian Haley56d417b2009-06-01 03:07:33 -070082
83module_param_named(disable, disable_ipv6_mod, int, 0444);
84MODULE_PARM_DESC(disable, "Disable IPv6 module such that it is non-functional");
85
86module_param_named(disable_ipv6, ipv6_defaults.disable_ipv6, int, 0444);
87MODULE_PARM_DESC(disable_ipv6, "Disable IPv6 on all interfaces");
88
89module_param_named(autoconf, ipv6_defaults.autoconf, int, 0444);
90MODULE_PARM_DESC(autoconf, "Enable IPv6 address autoconfiguration on all interfaces");
Brian Haleyfe7ca2e2009-03-04 03:18:11 -080091
Linus Torvalds1da177e2005-04-16 15:20:36 -070092static __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
Eric Paris3f378b62009-11-05 22:18:14 -080099static int inet6_create(struct net *net, struct socket *sock, int protocol,
100 int kern)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101{
102 struct inet_sock *inet;
103 struct ipv6_pinfo *np;
104 struct sock *sk;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105 struct inet_protosw *answer;
106 struct proto *answer_prot;
107 unsigned char answer_flags;
108 char answer_no_check;
YOSHIFUJI Hideakiaf1afe82005-12-02 20:56:57 -0800109 int try_loading_module = 0;
110 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111
David S. Millerb3da2cf2007-03-23 11:40:27 -0700112 if (sock->type != SOCK_RAW &&
113 sock->type != SOCK_DGRAM &&
114 !inet_ehash_secret)
115 build_ehash_secret();
116
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117 /* Look for the requested type/protocol pair. */
YOSHIFUJI Hideakiaf1afe82005-12-02 20:56:57 -0800118lookup_protocol:
119 err = -ESOCKTNOSUPPORT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120 rcu_read_lock();
Paul E. McKenney696adfe2008-07-25 01:45:34 -0700121 list_for_each_entry_rcu(answer, &inetsw6[sock->type], list) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122
Paul E. McKenney696adfe2008-07-25 01:45:34 -0700123 err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124 /* 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 }
YOSHIFUJI Hideakiaf1afe82005-12-02 20:56:57 -0800137 err = -EPROTONOSUPPORT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138 }
139
Paul E. McKenney696adfe2008-07-25 01:45:34 -0700140 if (err) {
YOSHIFUJI Hideakiaf1afe82005-12-02 20:56:57 -0800141 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;
Eric W. Biedermanaf31f412012-11-16 03:03:06 +0000163 if (sock->type == SOCK_RAW && !kern &&
164 !ns_capable(net->user_ns, CAP_NET_RAW))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165 goto out_rcu_unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166
167 sock->ops = answer->ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168 answer_prot = answer->prot;
169 answer_no_check = answer->no_check;
170 answer_flags = answer->flags;
171 rcu_read_unlock();
172
Ilpo Järvinen547b7922008-07-25 21:43:18 -0700173 WARN_ON(answer_prot->slab == NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174
YOSHIFUJI Hideakiaf1afe82005-12-02 20:56:57 -0800175 err = -ENOBUFS;
Pavel Emelyanov6257ff22007-11-01 00:39:31 -0700176 sk = sk_alloc(net, PF_INET6, GFP_KERNEL, answer_prot);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177 if (sk == NULL)
178 goto out;
179
180 sock_init_data(sock, sk);
181
YOSHIFUJI Hideakiaf1afe82005-12-02 20:56:57 -0800182 err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183 sk->sk_no_check = answer_no_check;
184 if (INET_PROTOSW_REUSE & answer_flags)
Pavel Emelyanov4a17fd52012-04-19 03:39:36 +0000185 sk->sk_reuse = SK_CAN_REUSE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186
187 inet = inet_sk(sk);
Paul Moore469de9b2007-01-09 14:37:06 -0800188 inet->is_icsk = (INET_PROTOSW_ICSK & answer_flags) != 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189
190 if (SOCK_RAW == sock->type) {
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000191 inet->inet_num = protocol;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192 if (IPPROTO_RAW == protocol)
193 inet->hdrincl = 1;
194 }
195
Arnaldo Carvalho de Meloe6848972005-08-09 19:45:38 -0700196 sk->sk_destruct = inet_sock_destruct;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197 sk->sk_family = PF_INET6;
198 sk->sk_protocol = protocol;
199
200 sk->sk_backlog_rcv = answer->prot->backlog_rcv;
201
202 inet_sk(sk)->pinet6 = np = inet6_sk_generic(sk);
203 np->hop_limit = -1;
David S. Millerf935aa92010-05-03 23:42:27 -0700204 np->mcast_hops = IPV6_DEFAULT_MCASTHOPS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205 np->mc_loop = 1;
206 np->pmtudisc = IPV6_PMTUDISC_WANT;
Pavel Emelyanov2e761e02008-06-09 15:53:30 -0700207 np->ipv6only = net->ipv6.sysctl.bindv6only;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900208
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209 /* Init the ipv4 part of the socket since we can have sockets
210 * using v6 API for ipv4.
211 */
212 inet->uc_ttl = -1;
213
214 inet->mc_loop = 1;
215 inet->mc_ttl = 1;
216 inet->mc_index = 0;
217 inet->mc_list = NULL;
Jiri Benc4c507d22012-02-09 09:35:49 +0000218 inet->rcv_tos = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219
220 if (ipv4_config.no_pmtu_disc)
221 inet->pmtudisc = IP_PMTUDISC_DONT;
222 else
223 inet->pmtudisc = IP_PMTUDISC_WANT;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900224 /*
Arnaldo Carvalho de Meloe6848972005-08-09 19:45:38 -0700225 * Increment only the relevant sk_prot->socks debug field, this changes
226 * the previous behaviour of incrementing both the equivalent to
227 * answer->prot->socks (inet6_sock_nr) and inet_sock_nr.
228 *
229 * This allows better debug granularity as we'll know exactly how many
230 * UDPv6, TCPv6, etc socks were allocated, not the sum of all IPv6
231 * transport protocol socks. -acme
232 */
233 sk_refcnt_debug_inc(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000235 if (inet->inet_num) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236 /* It assumes that any protocol which allows
237 * the user to assign a number at socket
238 * creation time automatically shares.
239 */
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000240 inet->inet_sport = htons(inet->inet_num);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241 sk->sk_prot->hash(sk);
242 }
243 if (sk->sk_prot->init) {
YOSHIFUJI Hideakiaf1afe82005-12-02 20:56:57 -0800244 err = sk->sk_prot->init(sk);
245 if (err) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246 sk_common_release(sk);
247 goto out;
248 }
249 }
250out:
YOSHIFUJI Hideakiaf1afe82005-12-02 20:56:57 -0800251 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252out_rcu_unlock:
253 rcu_read_unlock();
254 goto out;
255}
256
257
258/* bind for INET6 API */
259int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
260{
Eldad Zack647c0c72012-05-05 10:13:53 +0000261 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)uaddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262 struct sock *sk = sock->sk;
263 struct inet_sock *inet = inet_sk(sk);
264 struct ipv6_pinfo *np = inet6_sk(sk);
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +0900265 struct net *net = sock_net(sk);
Al Virofd683222006-09-26 22:17:51 -0700266 __be32 v4addr = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267 unsigned short snum;
268 int addr_type = 0;
269 int err = 0;
270
271 /* If the socket has its own bind function then use it. */
272 if (sk->sk_prot->bind)
273 return sk->sk_prot->bind(sk, uaddr, addr_len);
274
275 if (addr_len < SIN6_LEN_RFC2133)
276 return -EINVAL;
Marcus Meissner5a079c32011-06-06 06:00:07 +0000277
278 if (addr->sin6_family != AF_INET6)
Marcus Meissnerc349a522011-07-04 01:30:29 +0000279 return -EAFNOSUPPORT;
Marcus Meissner5a079c32011-06-06 06:00:07 +0000280
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281 addr_type = ipv6_addr_type(&addr->sin6_addr);
282 if ((addr_type & IPV6_ADDR_MULTICAST) && sock->type == SOCK_STREAM)
283 return -EINVAL;
284
285 snum = ntohs(addr->sin6_port);
Eric W. Biederman35946982012-11-16 03:03:12 +0000286 if (snum && snum < PROT_SOCK && !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287 return -EACCES;
288
289 lock_sock(sk);
290
291 /* Check these errors (active socket, double bind). */
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000292 if (sk->sk_state != TCP_CLOSE || inet->inet_num) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293 err = -EINVAL;
294 goto out;
295 }
296
297 /* Check if the address belongs to the host. */
298 if (addr_type == IPV6_ADDR_MAPPED) {
Vlad Yasevich63d99502009-03-24 16:24:50 +0000299 int chk_addr_ret;
300
Vlad Yasevich783ed5a2009-03-24 16:24:48 +0000301 /* Binding to v4-mapped address on a v6-only socket
302 * makes no sense
303 */
304 if (np->ipv6only) {
305 err = -EINVAL;
306 goto out;
307 }
Vlad Yasevich63d99502009-03-24 16:24:50 +0000308
Uwe Kleine-Königa34f0b32010-12-10 14:55:42 +0100309 /* Reproduce AF_INET checks to make the bindings consistent */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310 v4addr = addr->sin6_addr.s6_addr32[3];
Vlad Yasevich63d99502009-03-24 16:24:50 +0000311 chk_addr_ret = inet_addr_type(net, v4addr);
312 if (!sysctl_ip_nonlocal_bind &&
313 !(inet->freebind || inet->transparent) &&
314 v4addr != htonl(INADDR_ANY) &&
315 chk_addr_ret != RTN_LOCAL &&
316 chk_addr_ret != RTN_MULTICAST &&
Bruno Prémontca6982b2009-08-23 19:06:28 -0700317 chk_addr_ret != RTN_BROADCAST) {
318 err = -EADDRNOTAVAIL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319 goto out;
Bruno Prémontca6982b2009-08-23 19:06:28 -0700320 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321 } else {
322 if (addr_type != IPV6_ADDR_ANY) {
323 struct net_device *dev = NULL;
324
Eric Dumazet16ba5e82009-11-02 12:10:39 +0100325 rcu_read_lock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326 if (addr_type & IPV6_ADDR_LINKLOCAL) {
327 if (addr_len >= sizeof(struct sockaddr_in6) &&
328 addr->sin6_scope_id) {
329 /* Override any existing binding, if another one
330 * is supplied by user.
331 */
332 sk->sk_bound_dev_if = addr->sin6_scope_id;
333 }
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900334
Linus Torvalds1da177e2005-04-16 15:20:36 -0700335 /* Binding to link-local address requires an interface */
336 if (!sk->sk_bound_dev_if) {
337 err = -EINVAL;
Eric Dumazet16ba5e82009-11-02 12:10:39 +0100338 goto out_unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339 }
Eric Dumazet16ba5e82009-11-02 12:10:39 +0100340 dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341 if (!dev) {
342 err = -ENODEV;
Eric Dumazet16ba5e82009-11-02 12:10:39 +0100343 goto out_unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344 }
345 }
346
347 /* ipv4 addr of the socket is invalid. Only the
348 * unspecified and mapped address have a v4 equivalent.
349 */
350 v4addr = LOOPBACK4_IPV6;
351 if (!(addr_type & IPV6_ADDR_MULTICAST)) {
Maciej Żenczykowskif74024d2011-11-07 14:57:21 +0000352 if (!(inet->freebind || inet->transparent) &&
Balazs Scheidler0a513f62010-10-21 16:10:03 +0200353 !ipv6_chk_addr(net, &addr->sin6_addr,
Daniel Lezcanobfeade02008-01-10 22:43:18 -0800354 dev, 0)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355 err = -EADDRNOTAVAIL;
Eric Dumazet16ba5e82009-11-02 12:10:39 +0100356 goto out_unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357 }
358 }
Eric Dumazet16ba5e82009-11-02 12:10:39 +0100359 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360 }
361 }
362
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000363 inet->inet_rcv_saddr = v4addr;
364 inet->inet_saddr = v4addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +0000366 np->rcv_saddr = addr->sin6_addr;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900367
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368 if (!(addr_type & IPV6_ADDR_MULTICAST))
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +0000369 np->saddr = addr->sin6_addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370
371 /* Make sure we are allowed to bind here. */
372 if (sk->sk_prot->get_port(sk, snum)) {
373 inet_reset_saddr(sk);
374 err = -EADDRINUSE;
375 goto out;
376 }
377
Vlad Yasevich0f8d3c72009-03-24 16:24:49 +0000378 if (addr_type != IPV6_ADDR_ANY) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379 sk->sk_userlocks |= SOCK_BINDADDR_LOCK;
Vlad Yasevich0f8d3c72009-03-24 16:24:49 +0000380 if (addr_type != IPV6_ADDR_MAPPED)
381 np->ipv6only = 1;
382 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383 if (snum)
384 sk->sk_userlocks |= SOCK_BINDPORT_LOCK;
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000385 inet->inet_sport = htons(inet->inet_num);
386 inet->inet_dport = 0;
387 inet->inet_daddr = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388out:
389 release_sock(sk);
390 return err;
Eric Dumazet16ba5e82009-11-02 12:10:39 +0100391out_unlock:
392 rcu_read_unlock();
393 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394}
YOSHIFUJI Hideaki71590392007-02-22 22:05:40 +0900395EXPORT_SYMBOL(inet6_bind);
396
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397int inet6_release(struct socket *sock)
398{
399 struct sock *sk = sock->sk;
400
401 if (sk == NULL)
402 return -EINVAL;
403
404 /* Free mc lists */
405 ipv6_sock_mc_close(sk);
406
407 /* Free ac lists */
408 ipv6_sock_ac_close(sk);
409
410 return inet_release(sock);
411}
YOSHIFUJI Hideaki71590392007-02-22 22:05:40 +0900412EXPORT_SYMBOL(inet6_release);
413
Brian Haley7d06b2e2008-06-14 17:04:49 -0700414void inet6_destroy_sock(struct sock *sk)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415{
416 struct ipv6_pinfo *np = inet6_sk(sk);
417 struct sk_buff *skb;
418 struct ipv6_txoptions *opt;
419
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420 /* Release rx options */
421
Eldad Zack647c0c72012-05-05 10:13:53 +0000422 skb = xchg(&np->pktoptions, NULL);
423 if (skb != NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424 kfree_skb(skb);
425
Eldad Zack647c0c72012-05-05 10:13:53 +0000426 skb = xchg(&np->rxpmtu, NULL);
427 if (skb != NULL)
Brian Haley4b340ae2010-04-23 11:26:09 +0000428 kfree_skb(skb);
429
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430 /* Free flowlabels */
431 fl6_free_socklist(sk);
432
433 /* Free tx options */
434
Eldad Zack647c0c72012-05-05 10:13:53 +0000435 opt = xchg(&np->opt, NULL);
436 if (opt != NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437 sock_kfree_s(sk, opt, opt->tot_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438}
Arnaldo Carvalho de Melo3cf3dc62005-12-13 23:23:20 -0800439EXPORT_SYMBOL_GPL(inet6_destroy_sock);
440
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441/*
442 * This does both peername and sockname.
443 */
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900444
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
446 int *uaddr_len, int peer)
447{
Eldad Zack647c0c72012-05-05 10:13:53 +0000448 struct sockaddr_in6 *sin = (struct sockaddr_in6 *)uaddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449 struct sock *sk = sock->sk;
450 struct inet_sock *inet = inet_sk(sk);
451 struct ipv6_pinfo *np = inet6_sk(sk);
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900452
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453 sin->sin6_family = AF_INET6;
454 sin->sin6_flowinfo = 0;
455 sin->sin6_scope_id = 0;
456 if (peer) {
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000457 if (!inet->inet_dport)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458 return -ENOTCONN;
459 if (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) &&
460 peer == 1)
461 return -ENOTCONN;
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000462 sin->sin6_port = inet->inet_dport;
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +0000463 sin->sin6_addr = np->daddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464 if (np->sndflow)
465 sin->sin6_flowinfo = np->flow_label;
466 } else {
467 if (ipv6_addr_any(&np->rcv_saddr))
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +0000468 sin->sin6_addr = np->saddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469 else
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +0000470 sin->sin6_addr = np->rcv_saddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000472 sin->sin6_port = inet->inet_sport;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473 }
474 if (ipv6_addr_type(&sin->sin6_addr) & IPV6_ADDR_LINKLOCAL)
475 sin->sin6_scope_id = sk->sk_bound_dev_if;
476 *uaddr_len = sizeof(*sin);
Eric Dumazeta02cec22010-09-22 20:43:57 +0000477 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478}
YOSHIFUJI Hideaki71590392007-02-22 22:05:40 +0900479EXPORT_SYMBOL(inet6_getname);
480
Linus Torvalds1da177e2005-04-16 15:20:36 -0700481int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
482{
483 struct sock *sk = sock->sk;
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +0900484 struct net *net = sock_net(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485
Eldad Zack647c0c72012-05-05 10:13:53 +0000486 switch (cmd) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700487 case SIOCGSTAMP:
488 return sock_get_timestamp(sk, (struct timeval __user *)arg);
489
Eric Dumazetae40eb12007-03-18 17:33:16 -0700490 case SIOCGSTAMPNS:
491 return sock_get_timestampns(sk, (struct timespec __user *)arg);
492
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493 case SIOCADDRT:
494 case SIOCDELRT:
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900495
Eric Dumazeta02cec22010-09-22 20:43:57 +0000496 return ipv6_route_ioctl(net, cmd, (void __user *)arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700497
498 case SIOCSIFADDR:
Daniel Lezcanoaf284932008-03-05 10:46:57 -0800499 return addrconf_add_ifaddr(net, (void __user *) arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500 case SIOCDIFADDR:
Daniel Lezcanoaf284932008-03-05 10:46:57 -0800501 return addrconf_del_ifaddr(net, (void __user *) arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502 case SIOCSIFDSTADDR:
Daniel Lezcanoaf284932008-03-05 10:46:57 -0800503 return addrconf_set_dstaddr(net, (void __user *) arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504 default:
Christoph Hellwigb5e5fa52006-01-03 14:18:33 -0800505 if (!sk->sk_prot->ioctl)
506 return -ENOIOCTLCMD;
507 return sk->sk_prot->ioctl(sk, cmd, arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700508 }
509 /*NOTREACHED*/
Eric Dumazeta02cec22010-09-22 20:43:57 +0000510 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511}
YOSHIFUJI Hideaki71590392007-02-22 22:05:40 +0900512EXPORT_SYMBOL(inet6_ioctl);
513
Eric Dumazet90ddc4f2005-12-22 12:49:22 -0800514const struct proto_ops inet6_stream_ops = {
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800515 .family = PF_INET6,
516 .owner = THIS_MODULE,
517 .release = inet6_release,
518 .bind = inet6_bind,
519 .connect = inet_stream_connect, /* ok */
520 .socketpair = sock_no_socketpair, /* a do nothing */
521 .accept = inet_accept, /* ok */
522 .getname = inet6_getname,
523 .poll = tcp_poll, /* ok */
524 .ioctl = inet6_ioctl, /* must change */
525 .listen = inet_listen, /* ok */
526 .shutdown = inet_shutdown, /* ok */
527 .setsockopt = sock_common_setsockopt, /* ok */
528 .getsockopt = sock_common_getsockopt, /* ok */
Changli Gao7ba42912010-07-10 20:41:55 +0000529 .sendmsg = inet_sendmsg, /* ok */
530 .recvmsg = inet_recvmsg, /* ok */
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800531 .mmap = sock_no_mmap,
Changli Gao7ba42912010-07-10 20:41:55 +0000532 .sendpage = inet_sendpage,
Jens Axboea0974dd2007-11-06 23:31:58 -0800533 .splice_read = tcp_splice_read,
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800534#ifdef CONFIG_COMPAT
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800535 .compat_setsockopt = compat_sock_common_setsockopt,
536 .compat_getsockopt = compat_sock_common_getsockopt,
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800537#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538};
539
Eric Dumazet90ddc4f2005-12-22 12:49:22 -0800540const struct proto_ops inet6_dgram_ops = {
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800541 .family = PF_INET6,
542 .owner = THIS_MODULE,
543 .release = inet6_release,
544 .bind = inet6_bind,
545 .connect = inet_dgram_connect, /* ok */
546 .socketpair = sock_no_socketpair, /* a do nothing */
547 .accept = sock_no_accept, /* a do nothing */
548 .getname = inet6_getname,
549 .poll = udp_poll, /* ok */
550 .ioctl = inet6_ioctl, /* must change */
551 .listen = sock_no_listen, /* ok */
552 .shutdown = inet_shutdown, /* ok */
553 .setsockopt = sock_common_setsockopt, /* ok */
554 .getsockopt = sock_common_getsockopt, /* ok */
555 .sendmsg = inet_sendmsg, /* ok */
Changli Gao7ba42912010-07-10 20:41:55 +0000556 .recvmsg = inet_recvmsg, /* ok */
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800557 .mmap = sock_no_mmap,
558 .sendpage = sock_no_sendpage,
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800559#ifdef CONFIG_COMPAT
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800560 .compat_setsockopt = compat_sock_common_setsockopt,
561 .compat_getsockopt = compat_sock_common_getsockopt,
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800562#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700563};
564
Stephen Hemmingerec1b4cf2009-10-05 05:58:39 +0000565static const struct net_proto_family inet6_family_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566 .family = PF_INET6,
567 .create = inet6_create,
568 .owner = THIS_MODULE,
569};
570
Daniel Lezcano87c3efb2007-12-11 02:25:01 -0800571int inet6_register_protosw(struct inet_protosw *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572{
573 struct list_head *lh;
574 struct inet_protosw *answer;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575 struct list_head *last_perm;
Daniel Lezcano87c3efb2007-12-11 02:25:01 -0800576 int protocol = p->protocol;
577 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700578
579 spin_lock_bh(&inetsw6_lock);
580
Daniel Lezcano87c3efb2007-12-11 02:25:01 -0800581 ret = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582 if (p->type >= SOCK_MAX)
583 goto out_illegal;
584
585 /* If we are trying to override a permanent protocol, bail. */
586 answer = NULL;
Daniel Lezcano87c3efb2007-12-11 02:25:01 -0800587 ret = -EPERM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700588 last_perm = &inetsw6[p->type];
589 list_for_each(lh, &inetsw6[p->type]) {
590 answer = list_entry(lh, struct inet_protosw, list);
591
592 /* Check only the non-wild match. */
593 if (INET_PROTOSW_PERMANENT & answer->flags) {
594 if (protocol == answer->protocol)
595 break;
596 last_perm = lh;
597 }
598
599 answer = NULL;
600 }
601 if (answer)
602 goto out_permanent;
603
604 /* Add the new entry after the last permanent entry if any, so that
605 * the new entry does not override a permanent entry when matched with
606 * a wild-card protocol. But it is allowed to override any existing
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900607 * non-permanent entry. This means that when we remove this entry, the
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608 * system automatically returns to the old behavior.
609 */
610 list_add_rcu(&p->list, last_perm);
Daniel Lezcano87c3efb2007-12-11 02:25:01 -0800611 ret = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612out:
613 spin_unlock_bh(&inetsw6_lock);
Daniel Lezcano87c3efb2007-12-11 02:25:01 -0800614 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700615
616out_permanent:
Joe Perchesf3213832012-05-15 14:11:53 +0000617 pr_err("Attempt to override permanent protocol %d\n", protocol);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700618 goto out;
619
620out_illegal:
Joe Perchesf3213832012-05-15 14:11:53 +0000621 pr_err("Ignoring attempt to register invalid socket type %d\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622 p->type);
623 goto out;
624}
YOSHIFUJI Hideaki71590392007-02-22 22:05:40 +0900625EXPORT_SYMBOL(inet6_register_protosw);
626
Linus Torvalds1da177e2005-04-16 15:20:36 -0700627void
628inet6_unregister_protosw(struct inet_protosw *p)
629{
630 if (INET_PROTOSW_PERMANENT & p->flags) {
Joe Perchesf3213832012-05-15 14:11:53 +0000631 pr_err("Attempt to unregister permanent protocol %d\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700632 p->protocol);
633 } else {
634 spin_lock_bh(&inetsw6_lock);
635 list_del_rcu(&p->list);
636 spin_unlock_bh(&inetsw6_lock);
637
638 synchronize_net();
639 }
640}
YOSHIFUJI Hideaki71590392007-02-22 22:05:40 +0900641EXPORT_SYMBOL(inet6_unregister_protosw);
642
Arnaldo Carvalho de Melob9750ce2005-12-13 23:22:54 -0800643int inet6_sk_rebuild_header(struct sock *sk)
644{
Arnaldo Carvalho de Melob9750ce2005-12-13 23:22:54 -0800645 struct ipv6_pinfo *np = inet6_sk(sk);
David S. Miller68d0c6d2011-03-01 13:19:07 -0800646 struct dst_entry *dst;
Arnaldo Carvalho de Melob9750ce2005-12-13 23:22:54 -0800647
648 dst = __sk_dst_check(sk, np->dst_cookie);
649
650 if (dst == NULL) {
651 struct inet_sock *inet = inet_sk(sk);
Arnaud Ebalard20c59de2010-06-01 21:35:01 +0000652 struct in6_addr *final_p, final;
David S. Miller4c9483b2011-03-12 16:22:43 -0500653 struct flowi6 fl6;
Arnaldo Carvalho de Melob9750ce2005-12-13 23:22:54 -0800654
David S. Miller4c9483b2011-03-12 16:22:43 -0500655 memset(&fl6, 0, sizeof(fl6));
656 fl6.flowi6_proto = sk->sk_protocol;
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +0000657 fl6.daddr = np->daddr;
658 fl6.saddr = np->saddr;
David S. Miller4c9483b2011-03-12 16:22:43 -0500659 fl6.flowlabel = np->flow_label;
660 fl6.flowi6_oif = sk->sk_bound_dev_if;
661 fl6.flowi6_mark = sk->sk_mark;
David S. Miller1958b852011-03-12 16:36:19 -0500662 fl6.fl6_dport = inet->inet_dport;
663 fl6.fl6_sport = inet->inet_sport;
David S. Miller4c9483b2011-03-12 16:22:43 -0500664 security_sk_classify_flow(sk, flowi6_to_flowi(&fl6));
Arnaldo Carvalho de Melob9750ce2005-12-13 23:22:54 -0800665
David S. Miller4c9483b2011-03-12 16:22:43 -0500666 final_p = fl6_update_dst(&fl6, np->opt, &final);
Arnaldo Carvalho de Melob9750ce2005-12-13 23:22:54 -0800667
David S. Miller4c9483b2011-03-12 16:22:43 -0500668 dst = ip6_dst_lookup_flow(sk, &fl6, final_p, false);
David S. Miller68d0c6d2011-03-01 13:19:07 -0800669 if (IS_ERR(dst)) {
Arnaldo Carvalho de Melob9750ce2005-12-13 23:22:54 -0800670 sk->sk_route_caps = 0;
David S. Miller68d0c6d2011-03-01 13:19:07 -0800671 sk->sk_err_soft = -PTR_ERR(dst);
672 return PTR_ERR(dst);
Arnaldo Carvalho de Melob9750ce2005-12-13 23:22:54 -0800673 }
674
YOSHIFUJI Hideaki8e1ef0a2006-08-29 17:15:09 -0700675 __ip6_dst_store(sk, dst, NULL, NULL);
Arnaldo Carvalho de Melob9750ce2005-12-13 23:22:54 -0800676 }
677
678 return 0;
679}
Arnaldo Carvalho de Melob9750ce2005-12-13 23:22:54 -0800680EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header);
681
Eric Dumazet92113bf2012-05-18 08:14:11 +0200682bool ipv6_opt_accepted(const struct sock *sk, const struct sk_buff *skb)
Arnaldo Carvalho de Melo399c07d2005-12-13 23:24:28 -0800683{
Eric Dumazet92113bf2012-05-18 08:14:11 +0200684 const struct ipv6_pinfo *np = inet6_sk(sk);
685 const struct inet6_skb_parm *opt = IP6CB(skb);
Arnaldo Carvalho de Melo399c07d2005-12-13 23:24:28 -0800686
687 if (np->rxopt.all) {
688 if ((opt->hop && (np->rxopt.bits.hopopts ||
689 np->rxopt.bits.ohopopts)) ||
Arnaldo Carvalho de Melod56f90a2007-04-10 20:50:43 -0700690 ((IPV6_FLOWINFO_MASK &
691 *(__be32 *)skb_network_header(skb)) &&
Arnaldo Carvalho de Melo399c07d2005-12-13 23:24:28 -0800692 np->rxopt.bits.rxflow) ||
693 (opt->srcrt && (np->rxopt.bits.srcrt ||
694 np->rxopt.bits.osrcrt)) ||
695 ((opt->dst1 || opt->dst0) &&
696 (np->rxopt.bits.dstopts || np->rxopt.bits.odstopts)))
Eric Dumazet92113bf2012-05-18 08:14:11 +0200697 return true;
Arnaldo Carvalho de Melo399c07d2005-12-13 23:24:28 -0800698 }
Eric Dumazet92113bf2012-05-18 08:14:11 +0200699 return false;
Arnaldo Carvalho de Melo399c07d2005-12-13 23:24:28 -0800700}
Arnaldo Carvalho de Melo399c07d2005-12-13 23:24:28 -0800701EXPORT_SYMBOL_GPL(ipv6_opt_accepted);
702
Stephen Hemminger7546dd92009-03-09 08:18:29 +0000703static struct packet_type ipv6_packet_type __read_mostly = {
Harvey Harrison09640e62009-02-01 00:45:17 -0800704 .type = cpu_to_be16(ETH_P_IPV6),
YOSHIFUJI Hideaki662397f2008-02-27 23:14:03 +0900705 .func = ipv6_rcv,
Vlad Yasevich22061d82012-11-15 08:49:11 +0000706};
707
YOSHIFUJI Hideaki662397f2008-02-27 23:14:03 +0900708static int __init ipv6_packet_init(void)
709{
710 dev_add_pack(&ipv6_packet_type);
711 return 0;
712}
713
714static void ipv6_packet_cleanup(void)
715{
716 dev_remove_pack(&ipv6_packet_type);
717}
718
Denis V. Luneve43291c2008-10-07 14:48:53 -0700719static int __net_init ipv6_init_mibs(struct net *net)
720{
Tejun Heo7d720c32010-02-16 15:20:26 +0000721 if (snmp_mib_init((void __percpu **)net->mib.udp_stats_in6,
Eric Dumazet1823e4c82010-06-22 20:58:41 +0000722 sizeof(struct udp_mib),
723 __alignof__(struct udp_mib)) < 0)
Denis V. Lunev0c7ed672008-10-07 14:49:36 -0700724 return -ENOMEM;
Tejun Heo7d720c32010-02-16 15:20:26 +0000725 if (snmp_mib_init((void __percpu **)net->mib.udplite_stats_in6,
Eric Dumazet1823e4c82010-06-22 20:58:41 +0000726 sizeof(struct udp_mib),
727 __alignof__(struct udp_mib)) < 0)
Denis V. Lunevbe713a42008-10-07 14:50:06 -0700728 goto err_udplite_mib;
Tejun Heo7d720c32010-02-16 15:20:26 +0000729 if (snmp_mib_init((void __percpu **)net->mib.ipv6_statistics,
Eric Dumazet1823e4c82010-06-22 20:58:41 +0000730 sizeof(struct ipstats_mib),
731 __alignof__(struct ipstats_mib)) < 0)
Denis V. Lunev9261e532008-10-08 10:36:03 -0700732 goto err_ip_mib;
Tejun Heo7d720c32010-02-16 15:20:26 +0000733 if (snmp_mib_init((void __percpu **)net->mib.icmpv6_statistics,
Eric Dumazet1823e4c82010-06-22 20:58:41 +0000734 sizeof(struct icmpv6_mib),
735 __alignof__(struct icmpv6_mib)) < 0)
Denis V. Lunev9261e532008-10-08 10:36:03 -0700736 goto err_icmp_mib;
Eric Dumazet2a244442011-11-13 01:24:04 +0000737 net->mib.icmpv6msg_statistics = kzalloc(sizeof(struct icmpv6msg_mib),
738 GFP_KERNEL);
739 if (!net->mib.icmpv6msg_statistics)
Denis V. Lunev9261e532008-10-08 10:36:03 -0700740 goto err_icmpmsg_mib;
Denis V. Luneve43291c2008-10-07 14:48:53 -0700741 return 0;
Denis V. Lunevbe713a42008-10-07 14:50:06 -0700742
Denis V. Lunev9261e532008-10-08 10:36:03 -0700743err_icmpmsg_mib:
Tejun Heo7d720c32010-02-16 15:20:26 +0000744 snmp_mib_free((void __percpu **)net->mib.icmpv6_statistics);
Denis V. Lunev9261e532008-10-08 10:36:03 -0700745err_icmp_mib:
Tejun Heo7d720c32010-02-16 15:20:26 +0000746 snmp_mib_free((void __percpu **)net->mib.ipv6_statistics);
Denis V. Lunev9261e532008-10-08 10:36:03 -0700747err_ip_mib:
Tejun Heo7d720c32010-02-16 15:20:26 +0000748 snmp_mib_free((void __percpu **)net->mib.udplite_stats_in6);
Denis V. Lunevbe713a42008-10-07 14:50:06 -0700749err_udplite_mib:
Tejun Heo7d720c32010-02-16 15:20:26 +0000750 snmp_mib_free((void __percpu **)net->mib.udp_stats_in6);
Denis V. Lunevbe713a42008-10-07 14:50:06 -0700751 return -ENOMEM;
Denis V. Luneve43291c2008-10-07 14:48:53 -0700752}
753
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +0000754static void ipv6_cleanup_mibs(struct net *net)
Denis V. Luneve43291c2008-10-07 14:48:53 -0700755{
Tejun Heo7d720c32010-02-16 15:20:26 +0000756 snmp_mib_free((void __percpu **)net->mib.udp_stats_in6);
757 snmp_mib_free((void __percpu **)net->mib.udplite_stats_in6);
758 snmp_mib_free((void __percpu **)net->mib.ipv6_statistics);
759 snmp_mib_free((void __percpu **)net->mib.icmpv6_statistics);
Eric Dumazet2a244442011-11-13 01:24:04 +0000760 kfree(net->mib.icmpv6msg_statistics);
Denis V. Luneve43291c2008-10-07 14:48:53 -0700761}
762
Alexey Dobriyane7dc8492008-10-13 18:54:07 -0700763static int __net_init inet6_net_init(struct net *net)
Daniel Lezcano81c1c172008-01-10 02:48:33 -0800764{
Daniel Lezcano0c96d8c2008-03-21 04:14:17 -0700765 int err = 0;
766
Daniel Lezcano99bc9c42008-01-10 02:54:53 -0800767 net->ipv6.sysctl.bindv6only = 0;
Daniel Lezcano41a76902008-01-10 03:02:40 -0800768 net->ipv6.sysctl.icmpv6_time = 1*HZ;
Daniel Lezcanoe71e0342008-01-10 02:56:03 -0800769
Denis V. Luneve43291c2008-10-07 14:48:53 -0700770 err = ipv6_init_mibs(net);
771 if (err)
772 return err;
Daniel Lezcano0c96d8c2008-03-21 04:14:17 -0700773#ifdef CONFIG_PROC_FS
774 err = udp6_proc_init(net);
775 if (err)
776 goto out;
Daniel Lezcano6f8b13b2008-03-21 04:14:45 -0700777 err = tcp6_proc_init(net);
778 if (err)
779 goto proc_tcp6_fail;
Daniel Lezcano6ab57e72008-03-26 16:52:32 -0700780 err = ac6_proc_init(net);
781 if (err)
782 goto proc_ac6_fail;
Daniel Lezcano0c96d8c2008-03-21 04:14:17 -0700783#endif
784 return err;
Daniel Lezcano6f8b13b2008-03-21 04:14:45 -0700785
786#ifdef CONFIG_PROC_FS
Daniel Lezcano6ab57e72008-03-26 16:52:32 -0700787proc_ac6_fail:
788 tcp6_proc_exit(net);
Daniel Lezcano6f8b13b2008-03-21 04:14:45 -0700789proc_tcp6_fail:
790 udp6_proc_exit(net);
Denis V. Luneve43291c2008-10-07 14:48:53 -0700791out:
792 ipv6_cleanup_mibs(net);
793 return err;
Daniel Lezcano6f8b13b2008-03-21 04:14:45 -0700794#endif
Daniel Lezcano81c1c172008-01-10 02:48:33 -0800795}
796
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +0000797static void __net_exit inet6_net_exit(struct net *net)
Daniel Lezcano81c1c172008-01-10 02:48:33 -0800798{
Daniel Lezcano0c96d8c2008-03-21 04:14:17 -0700799#ifdef CONFIG_PROC_FS
800 udp6_proc_exit(net);
Daniel Lezcano6f8b13b2008-03-21 04:14:45 -0700801 tcp6_proc_exit(net);
Daniel Lezcano6ab57e72008-03-26 16:52:32 -0700802 ac6_proc_exit(net);
Daniel Lezcano0c96d8c2008-03-21 04:14:17 -0700803#endif
Denis V. Luneve43291c2008-10-07 14:48:53 -0700804 ipv6_cleanup_mibs(net);
Daniel Lezcano81c1c172008-01-10 02:48:33 -0800805}
806
807static struct pernet_operations inet6_net_ops = {
808 .init = inet6_net_init,
809 .exit = inet6_net_exit,
810};
811
Linus Torvalds1da177e2005-04-16 15:20:36 -0700812static int __init inet6_init(void)
813{
814 struct sk_buff *dummy_skb;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900815 struct list_head *r;
Brian Haleyfe7ca2e2009-03-04 03:18:11 -0800816 int err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700817
YOSHIFUJI Hideakief047f52006-09-01 00:29:06 -0700818 BUILD_BUG_ON(sizeof(struct inet6_skb_parm) > sizeof(dummy_skb->cb));
819
Brian Haleyfe7ca2e2009-03-04 03:18:11 -0800820 /* Register the socket-side information for inet6_create. */
Eldad Zack647c0c72012-05-05 10:13:53 +0000821 for (r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r)
Brian Haleyfe7ca2e2009-03-04 03:18:11 -0800822 INIT_LIST_HEAD(r);
823
Brian Haley56d417b2009-06-01 03:07:33 -0700824 if (disable_ipv6_mod) {
Joe Perchesf3213832012-05-15 14:11:53 +0000825 pr_info("Loaded, but administratively disabled, reboot required to enable\n");
Brian Haleyfe7ca2e2009-03-04 03:18:11 -0800826 goto out;
827 }
828
Linus Torvalds1da177e2005-04-16 15:20:36 -0700829 err = proto_register(&tcpv6_prot, 1);
830 if (err)
831 goto out;
832
833 err = proto_register(&udpv6_prot, 1);
834 if (err)
835 goto out_unregister_tcp_proto;
836
Gerrit Renkerba4e58e2006-11-27 11:10:57 -0800837 err = proto_register(&udplitev6_prot, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700838 if (err)
839 goto out_unregister_udp_proto;
840
Gerrit Renkerba4e58e2006-11-27 11:10:57 -0800841 err = proto_register(&rawv6_prot, 1);
842 if (err)
843 goto out_unregister_udplite_proto;
844
Linus Torvalds1da177e2005-04-16 15:20:36 -0700845
Linus Torvalds1da177e2005-04-16 15:20:36 -0700846 /* We MUST register RAW sockets before we create the ICMP6,
847 * IGMP6, or NDISC control sockets.
848 */
Daniel Lezcano7f4e4862007-12-11 02:25:35 -0800849 err = rawv6_init();
850 if (err)
851 goto out_unregister_raw_proto;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700852
853 /* Register the family here so that the init calls below will
854 * be able to create sockets. (?? is this dangerous ??)
855 */
David S. Miller8eb55912005-11-11 15:05:47 -0800856 err = sock_register(&inet6_family_ops);
857 if (err)
Daniel Lezcano7f4e4862007-12-11 02:25:35 -0800858 goto out_sock_register_fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700859
Glauber Costa3dc43e32011-12-11 21:47:05 +0000860 tcpv6_prot.sysctl_mem = init_net.ipv4.sysctl_tcp_mem;
861
Linus Torvalds1da177e2005-04-16 15:20:36 -0700862 /*
863 * ipngwg API draft makes clear that the correct semantics
864 * for TCP and UDP is to consider one TCP and UDP instance
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300865 * in a host available by both INET and INET6 APIs and
Linus Torvalds1da177e2005-04-16 15:20:36 -0700866 * able to communicate via both network protocols.
867 */
868
Daniel Lezcano81c1c172008-01-10 02:48:33 -0800869 err = register_pernet_subsys(&inet6_net_ops);
870 if (err)
871 goto register_pernet_fail;
Denis V. Lunev9b0f9762008-02-29 11:13:15 -0800872 err = icmpv6_init();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700873 if (err)
874 goto icmp_fail;
Wang Chen623d1a12008-07-03 12:13:30 +0800875 err = ip6_mr_init();
876 if (err)
877 goto ipmr_fail;
Denis V. Lunev9b0f9762008-02-29 11:13:15 -0800878 err = ndisc_init();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700879 if (err)
880 goto ndisc_fail;
Denis V. Lunev9b0f9762008-02-29 11:13:15 -0800881 err = igmp6_init();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700882 if (err)
883 goto igmp_fail;
Harald Welte2cc7d572005-08-09 19:42:34 -0700884 err = ipv6_netfilter_init();
885 if (err)
886 goto netfilter_fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700887 /* Create /proc/foo6 entries. */
888#ifdef CONFIG_PROC_FS
889 err = -ENOMEM;
890 if (raw6_proc_init())
891 goto proc_raw6_fail;
Gerrit Renkerba4e58e2006-11-27 11:10:57 -0800892 if (udplite6_proc_init())
893 goto proc_udplite6_fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700894 if (ipv6_misc_proc_init())
895 goto proc_misc6_fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700896 if (if6_proc_init())
897 goto proc_if6_fail;
898#endif
Daniel Lezcanoe2fddf52007-12-07 00:44:29 -0800899 err = ip6_route_init();
900 if (err)
901 goto ip6_route_fail;
Daniel Lezcano0a3e78a2007-12-11 02:23:18 -0800902 err = ip6_flowlabel_init();
903 if (err)
904 goto ip6_flowlabel_fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700905 err = addrconf_init();
906 if (err)
907 goto addrconf_fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700908
909 /* Init v6 extension headers. */
Daniel Lezcano248b2382007-12-11 02:23:54 -0800910 err = ipv6_exthdrs_init();
911 if (err)
912 goto ipv6_exthdrs_fail;
913
Daniel Lezcano853cbba2007-12-11 02:24:29 -0800914 err = ipv6_frag_init();
915 if (err)
916 goto ipv6_frag_fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700917
918 /* Init v6 transport protocols. */
Daniel Lezcano7f4e4862007-12-11 02:25:35 -0800919 err = udpv6_init();
920 if (err)
921 goto udpv6_fail;
Herbert Xue2ed4052005-07-05 14:41:20 -0700922
Daniel Lezcano7f4e4862007-12-11 02:25:35 -0800923 err = udplitev6_init();
924 if (err)
925 goto udplitev6_fail;
926
927 err = tcpv6_init();
928 if (err)
929 goto tcpv6_fail;
930
931 err = ipv6_packet_init();
932 if (err)
933 goto ipv6_packet_fail;
Benjamin Thery94911fe2008-03-05 10:45:36 -0800934
935#ifdef CONFIG_SYSCTL
936 err = ipv6_sysctl_register();
937 if (err)
938 goto sysctl_fail;
939#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700940out:
941 return err;
942
Benjamin Thery94911fe2008-03-05 10:45:36 -0800943#ifdef CONFIG_SYSCTL
944sysctl_fail:
945 ipv6_packet_cleanup();
946#endif
Daniel Lezcano7f4e4862007-12-11 02:25:35 -0800947ipv6_packet_fail:
948 tcpv6_exit();
949tcpv6_fail:
950 udplitev6_exit();
951udplitev6_fail:
952 udpv6_exit();
953udpv6_fail:
954 ipv6_frag_exit();
Daniel Lezcano853cbba2007-12-11 02:24:29 -0800955ipv6_frag_fail:
956 ipv6_exthdrs_exit();
Daniel Lezcano248b2382007-12-11 02:23:54 -0800957ipv6_exthdrs_fail:
958 addrconf_cleanup();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700959addrconf_fail:
960 ip6_flowlabel_cleanup();
Daniel Lezcano0a3e78a2007-12-11 02:23:18 -0800961ip6_flowlabel_fail:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700962 ip6_route_cleanup();
Daniel Lezcanoe2fddf52007-12-07 00:44:29 -0800963ip6_route_fail:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700964#ifdef CONFIG_PROC_FS
965 if6_proc_exit();
966proc_if6_fail:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700967 ipv6_misc_proc_exit();
968proc_misc6_fail:
Gerrit Renkerba4e58e2006-11-27 11:10:57 -0800969 udplite6_proc_exit();
970proc_udplite6_fail:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700971 raw6_proc_exit();
972proc_raw6_fail:
973#endif
Harald Welte2cc7d572005-08-09 19:42:34 -0700974 ipv6_netfilter_fini();
975netfilter_fail:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700976 igmp6_cleanup();
977igmp_fail:
978 ndisc_cleanup();
979ndisc_fail:
Wang Chen623d1a12008-07-03 12:13:30 +0800980 ip6_mr_cleanup();
981ipmr_fail:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700982 icmpv6_cleanup();
983icmp_fail:
Daniel Lezcano81c1c172008-01-10 02:48:33 -0800984 unregister_pernet_subsys(&inet6_net_ops);
985register_pernet_fail:
David S. Miller8eb55912005-11-11 15:05:47 -0800986 sock_unregister(PF_INET6);
Daniel Lezcanoe2fddf52007-12-07 00:44:29 -0800987 rtnl_unregister_all(PF_INET6);
Daniel Lezcano7f4e4862007-12-11 02:25:35 -0800988out_sock_register_fail:
989 rawv6_exit();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700990out_unregister_raw_proto:
991 proto_unregister(&rawv6_prot);
Gerrit Renkerba4e58e2006-11-27 11:10:57 -0800992out_unregister_udplite_proto:
993 proto_unregister(&udplitev6_prot);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700994out_unregister_udp_proto:
995 proto_unregister(&udpv6_prot);
996out_unregister_tcp_proto:
997 proto_unregister(&tcpv6_prot);
998 goto out;
999}
1000module_init(inet6_init);
1001
1002static void __exit inet6_exit(void)
1003{
Brian Haley56d417b2009-06-01 03:07:33 -07001004 if (disable_ipv6_mod)
John Dykstraff8cf9a2009-03-11 09:22:51 -07001005 return;
1006
Linus Torvalds1da177e2005-04-16 15:20:36 -07001007 /* First of all disallow new sockets creation. */
1008 sock_unregister(PF_INET6);
Thomas Grafc127ea22007-03-22 11:58:32 -07001009 /* Disallow any further netlink messages */
1010 rtnl_unregister_all(PF_INET6);
Joe Jinca17c232007-02-20 01:30:15 -08001011
Daniel Lezcano7f4e4862007-12-11 02:25:35 -08001012 udpv6_exit();
1013 udplitev6_exit();
1014 tcpv6_exit();
1015
Joe Jinca17c232007-02-20 01:30:15 -08001016 /* Cleanup code parts. */
1017 ipv6_packet_cleanup();
Daniel Lezcano853cbba2007-12-11 02:24:29 -08001018 ipv6_frag_exit();
Daniel Lezcano248b2382007-12-11 02:23:54 -08001019 ipv6_exthdrs_exit();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001020 addrconf_cleanup();
Joe Jinca17c232007-02-20 01:30:15 -08001021 ip6_flowlabel_cleanup();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001022 ip6_route_cleanup();
Joe Jinca17c232007-02-20 01:30:15 -08001023#ifdef CONFIG_PROC_FS
1024
1025 /* Cleanup code parts. */
1026 if6_proc_exit();
Joe Jinca17c232007-02-20 01:30:15 -08001027 ipv6_misc_proc_exit();
1028 udplite6_proc_exit();
Joe Jinca17c232007-02-20 01:30:15 -08001029 raw6_proc_exit();
1030#endif
Harald Welte2cc7d572005-08-09 19:42:34 -07001031 ipv6_netfilter_fini();
Joe Jinca17c232007-02-20 01:30:15 -08001032 igmp6_cleanup();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001033 ndisc_cleanup();
Wang Chen623d1a12008-07-03 12:13:30 +08001034 ip6_mr_cleanup();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001035 icmpv6_cleanup();
Daniel Lezcano7f4e4862007-12-11 02:25:35 -08001036 rawv6_exit();
Benjamin Thery94911fe2008-03-05 10:45:36 -08001037
Daniel Lezcano81c1c172008-01-10 02:48:33 -08001038 unregister_pernet_subsys(&inet6_net_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001039 proto_unregister(&rawv6_prot);
Joe Jinca17c232007-02-20 01:30:15 -08001040 proto_unregister(&udplitev6_prot);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001041 proto_unregister(&udpv6_prot);
1042 proto_unregister(&tcpv6_prot);
Jesper Dangaard Brouer1f2ccd02009-06-26 10:46:03 +00001043
1044 rcu_barrier(); /* Wait for completion of call_rcu()'s */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001045}
1046module_exit(inet6_exit);
1047
1048MODULE_ALIAS_NETPROTO(PF_INET6);