blob: e8c4400f23e9b4afe47fcc45bb761d82354fb6a6 [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 *
Ian Morris67ba4152014-08-24 21:53:10 +010010 * Fixes:
Linus Torvalds1da177e2005-04-16 15:20:36 -070011 * piggy, Karl Knutson : Socket protocol table
Ian Morris67ba4152014-08-24 21:53:10 +010012 * Hideaki YOSHIFUJI : sin6_scope_id support
13 * Arnaldo Melo : check proc_net_create return, cleanups
Linus Torvalds1da177e2005-04-16 15:20:36 -070014 *
15 * This program is free software; you can redistribute it and/or
Ian Morris67ba4152014-08-24 21:53:10 +010016 * 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.
Linus Torvalds1da177e2005-04-16 15:20:36 -070019 */
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>
Lorenzo Colitti6d0bfe22013-05-22 20:17:31 +000052#include <net/ping.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070053#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>
Cong Wangf564f452013-08-31 13:44:36 +080059#include <net/ndisc.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070060#ifdef CONFIG_IPV6_TUNNEL
61#include <net/ip6_tunnel.h>
62#endif
63
64#include <asm/uaccess.h>
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +090065#include <linux/mroute6.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070066
67MODULE_AUTHOR("Cast of dozens");
68MODULE_DESCRIPTION("IPv6 protocol stack for Linux");
69MODULE_LICENSE("GPL");
70
Pavel Emelyanovf1267342007-11-23 21:28:44 +080071/* The inetsw6 table contains everything that inet6_create needs to
Linus Torvalds1da177e2005-04-16 15:20:36 -070072 * build a new socket.
73 */
74static struct list_head inetsw6[SOCK_MAX];
75static DEFINE_SPINLOCK(inetsw6_lock);
76
Brian Haley56d417b2009-06-01 03:07:33 -070077struct ipv6_params ipv6_defaults = {
78 .disable_ipv6 = 0,
79 .autoconf = 1,
80};
81
Eldad Zack647c0c72012-05-05 10:13:53 +000082static int disable_ipv6_mod;
Brian Haley56d417b2009-06-01 03:07:33 -070083
84module_param_named(disable, disable_ipv6_mod, int, 0444);
85MODULE_PARM_DESC(disable, "Disable IPv6 module such that it is non-functional");
86
87module_param_named(disable_ipv6, ipv6_defaults.disable_ipv6, int, 0444);
88MODULE_PARM_DESC(disable_ipv6, "Disable IPv6 on all interfaces");
89
90module_param_named(autoconf, ipv6_defaults.autoconf, int, 0444);
91MODULE_PARM_DESC(autoconf, "Enable IPv6 address autoconfiguration on all interfaces");
Brian Haleyfe7ca2e2009-03-04 03:18:11 -080092
Linus Torvalds1da177e2005-04-16 15:20:36 -070093static __inline__ struct ipv6_pinfo *inet6_sk_generic(struct sock *sk)
94{
95 const int offset = sk->sk_prot->obj_size - sizeof(struct ipv6_pinfo);
96
97 return (struct ipv6_pinfo *)(((u8 *)sk) + offset);
98}
99
Eric Paris3f378b62009-11-05 22:18:14 -0800100static int inet6_create(struct net *net, struct socket *sock, int protocol,
101 int kern)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102{
103 struct inet_sock *inet;
104 struct ipv6_pinfo *np;
105 struct sock *sk;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106 struct inet_protosw *answer;
107 struct proto *answer_prot;
108 unsigned char answer_flags;
YOSHIFUJI Hideakiaf1afe82005-12-02 20:56:57 -0800109 int try_loading_module = 0;
110 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111
112 /* Look for the requested type/protocol pair. */
YOSHIFUJI Hideakiaf1afe82005-12-02 20:56:57 -0800113lookup_protocol:
114 err = -ESOCKTNOSUPPORT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115 rcu_read_lock();
Paul E. McKenney696adfe2008-07-25 01:45:34 -0700116 list_for_each_entry_rcu(answer, &inetsw6[sock->type], list) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117
Paul E. McKenney696adfe2008-07-25 01:45:34 -0700118 err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119 /* Check the non-wild match. */
120 if (protocol == answer->protocol) {
121 if (protocol != IPPROTO_IP)
122 break;
123 } else {
124 /* Check for the two wild cases. */
125 if (IPPROTO_IP == protocol) {
126 protocol = answer->protocol;
127 break;
128 }
129 if (IPPROTO_IP == answer->protocol)
130 break;
131 }
YOSHIFUJI Hideakiaf1afe82005-12-02 20:56:57 -0800132 err = -EPROTONOSUPPORT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133 }
134
Paul E. McKenney696adfe2008-07-25 01:45:34 -0700135 if (err) {
YOSHIFUJI Hideakiaf1afe82005-12-02 20:56:57 -0800136 if (try_loading_module < 2) {
137 rcu_read_unlock();
138 /*
139 * Be more specific, e.g. net-pf-10-proto-132-type-1
140 * (net-pf-PF_INET6-proto-IPPROTO_SCTP-type-SOCK_STREAM)
141 */
142 if (++try_loading_module == 1)
143 request_module("net-pf-%d-proto-%d-type-%d",
144 PF_INET6, protocol, sock->type);
145 /*
146 * Fall back to generic, e.g. net-pf-10-proto-132
147 * (net-pf-PF_INET6-proto-IPPROTO_SCTP)
148 */
149 else
150 request_module("net-pf-%d-proto-%d",
151 PF_INET6, protocol);
152 goto lookup_protocol;
153 } else
154 goto out_rcu_unlock;
155 }
156
157 err = -EPERM;
Eric W. Biedermanaf31f412012-11-16 03:03:06 +0000158 if (sock->type == SOCK_RAW && !kern &&
159 !ns_capable(net->user_ns, CAP_NET_RAW))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160 goto out_rcu_unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700161
162 sock->ops = answer->ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163 answer_prot = answer->prot;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700164 answer_flags = answer->flags;
165 rcu_read_unlock();
166
Ilpo Järvinen547b7922008-07-25 21:43:18 -0700167 WARN_ON(answer_prot->slab == NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700168
YOSHIFUJI Hideakiaf1afe82005-12-02 20:56:57 -0800169 err = -ENOBUFS;
Pavel Emelyanov6257ff22007-11-01 00:39:31 -0700170 sk = sk_alloc(net, PF_INET6, GFP_KERNEL, answer_prot);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171 if (sk == NULL)
172 goto out;
173
174 sock_init_data(sock, sk);
175
YOSHIFUJI Hideakiaf1afe82005-12-02 20:56:57 -0800176 err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177 if (INET_PROTOSW_REUSE & answer_flags)
Pavel Emelyanov4a17fd52012-04-19 03:39:36 +0000178 sk->sk_reuse = SK_CAN_REUSE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179
180 inet = inet_sk(sk);
Paul Moore469de9b2007-01-09 14:37:06 -0800181 inet->is_icsk = (INET_PROTOSW_ICSK & answer_flags) != 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182
183 if (SOCK_RAW == sock->type) {
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000184 inet->inet_num = protocol;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185 if (IPPROTO_RAW == protocol)
186 inet->hdrincl = 1;
187 }
188
Arnaldo Carvalho de Meloe6848972005-08-09 19:45:38 -0700189 sk->sk_destruct = inet_sock_destruct;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190 sk->sk_family = PF_INET6;
191 sk->sk_protocol = protocol;
192
193 sk->sk_backlog_rcv = answer->prot->backlog_rcv;
194
195 inet_sk(sk)->pinet6 = np = inet6_sk_generic(sk);
196 np->hop_limit = -1;
David S. Millerf935aa92010-05-03 23:42:27 -0700197 np->mcast_hops = IPV6_DEFAULT_MCASTHOPS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198 np->mc_loop = 1;
199 np->pmtudisc = IPV6_PMTUDISC_WANT;
Eric Dumazet9fe516b2014-06-27 08:36:16 -0700200 sk->sk_ipv6only = net->ipv6.sysctl.bindv6only;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900201
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202 /* Init the ipv4 part of the socket since we can have sockets
203 * using v6 API for ipv4.
204 */
205 inet->uc_ttl = -1;
206
207 inet->mc_loop = 1;
208 inet->mc_ttl = 1;
209 inet->mc_index = 0;
210 inet->mc_list = NULL;
Jiri Benc4c507d22012-02-09 09:35:49 +0000211 inet->rcv_tos = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212
Hannes Frederic Sowa974eda12013-12-14 05:13:38 +0100213 if (net->ipv4.sysctl_ip_no_pmtu_disc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214 inet->pmtudisc = IP_PMTUDISC_DONT;
215 else
216 inet->pmtudisc = IP_PMTUDISC_WANT;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900217 /*
Arnaldo Carvalho de Meloe6848972005-08-09 19:45:38 -0700218 * Increment only the relevant sk_prot->socks debug field, this changes
219 * the previous behaviour of incrementing both the equivalent to
220 * answer->prot->socks (inet6_sock_nr) and inet_sock_nr.
221 *
222 * This allows better debug granularity as we'll know exactly how many
223 * UDPv6, TCPv6, etc socks were allocated, not the sum of all IPv6
224 * transport protocol socks. -acme
225 */
226 sk_refcnt_debug_inc(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000228 if (inet->inet_num) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229 /* It assumes that any protocol which allows
230 * the user to assign a number at socket
231 * creation time automatically shares.
232 */
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000233 inet->inet_sport = htons(inet->inet_num);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234 sk->sk_prot->hash(sk);
235 }
236 if (sk->sk_prot->init) {
YOSHIFUJI Hideakiaf1afe82005-12-02 20:56:57 -0800237 err = sk->sk_prot->init(sk);
238 if (err) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239 sk_common_release(sk);
240 goto out;
241 }
242 }
243out:
YOSHIFUJI Hideakiaf1afe82005-12-02 20:56:57 -0800244 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245out_rcu_unlock:
246 rcu_read_unlock();
247 goto out;
248}
249
250
251/* bind for INET6 API */
252int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
253{
Eldad Zack647c0c72012-05-05 10:13:53 +0000254 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)uaddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255 struct sock *sk = sock->sk;
256 struct inet_sock *inet = inet_sk(sk);
257 struct ipv6_pinfo *np = inet6_sk(sk);
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +0900258 struct net *net = sock_net(sk);
Al Virofd683222006-09-26 22:17:51 -0700259 __be32 v4addr = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260 unsigned short snum;
261 int addr_type = 0;
262 int err = 0;
263
264 /* If the socket has its own bind function then use it. */
265 if (sk->sk_prot->bind)
266 return sk->sk_prot->bind(sk, uaddr, addr_len);
267
268 if (addr_len < SIN6_LEN_RFC2133)
269 return -EINVAL;
Marcus Meissner5a079c32011-06-06 06:00:07 +0000270
271 if (addr->sin6_family != AF_INET6)
Marcus Meissnerc349a522011-07-04 01:30:29 +0000272 return -EAFNOSUPPORT;
Marcus Meissner5a079c32011-06-06 06:00:07 +0000273
Linus Torvalds1da177e2005-04-16 15:20:36 -0700274 addr_type = ipv6_addr_type(&addr->sin6_addr);
275 if ((addr_type & IPV6_ADDR_MULTICAST) && sock->type == SOCK_STREAM)
276 return -EINVAL;
277
278 snum = ntohs(addr->sin6_port);
Eric W. Biederman35946982012-11-16 03:03:12 +0000279 if (snum && snum < PROT_SOCK && !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280 return -EACCES;
281
282 lock_sock(sk);
283
284 /* Check these errors (active socket, double bind). */
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000285 if (sk->sk_state != TCP_CLOSE || inet->inet_num) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286 err = -EINVAL;
287 goto out;
288 }
289
290 /* Check if the address belongs to the host. */
291 if (addr_type == IPV6_ADDR_MAPPED) {
Vlad Yasevich63d99502009-03-24 16:24:50 +0000292 int chk_addr_ret;
293
Vlad Yasevich783ed5a2009-03-24 16:24:48 +0000294 /* Binding to v4-mapped address on a v6-only socket
295 * makes no sense
296 */
Eric Dumazet9fe516b2014-06-27 08:36:16 -0700297 if (sk->sk_ipv6only) {
Vlad Yasevich783ed5a2009-03-24 16:24:48 +0000298 err = -EINVAL;
299 goto out;
300 }
Vlad Yasevich63d99502009-03-24 16:24:50 +0000301
Uwe Kleine-Königa34f0b32010-12-10 14:55:42 +0100302 /* Reproduce AF_INET checks to make the bindings consistent */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303 v4addr = addr->sin6_addr.s6_addr32[3];
Vlad Yasevich63d99502009-03-24 16:24:50 +0000304 chk_addr_ret = inet_addr_type(net, v4addr);
Vincent Bernat49a60152014-09-05 15:09:03 +0200305 if (!net->ipv4.sysctl_ip_nonlocal_bind &&
Vlad Yasevich63d99502009-03-24 16:24:50 +0000306 !(inet->freebind || inet->transparent) &&
307 v4addr != htonl(INADDR_ANY) &&
308 chk_addr_ret != RTN_LOCAL &&
309 chk_addr_ret != RTN_MULTICAST &&
Bruno Prémontca6982b2009-08-23 19:06:28 -0700310 chk_addr_ret != RTN_BROADCAST) {
311 err = -EADDRNOTAVAIL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312 goto out;
Bruno Prémontca6982b2009-08-23 19:06:28 -0700313 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314 } else {
315 if (addr_type != IPV6_ADDR_ANY) {
316 struct net_device *dev = NULL;
317
Eric Dumazet16ba5e82009-11-02 12:10:39 +0100318 rcu_read_lock();
Hannes Frederic Sowa842df072013-03-08 02:07:19 +0000319 if (__ipv6_addr_needs_scope_id(addr_type)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320 if (addr_len >= sizeof(struct sockaddr_in6) &&
321 addr->sin6_scope_id) {
322 /* Override any existing binding, if another one
323 * is supplied by user.
324 */
325 sk->sk_bound_dev_if = addr->sin6_scope_id;
326 }
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900327
Linus Torvalds1da177e2005-04-16 15:20:36 -0700328 /* Binding to link-local address requires an interface */
329 if (!sk->sk_bound_dev_if) {
330 err = -EINVAL;
Eric Dumazet16ba5e82009-11-02 12:10:39 +0100331 goto out_unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332 }
Eric Dumazet16ba5e82009-11-02 12:10:39 +0100333 dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334 if (!dev) {
335 err = -ENODEV;
Eric Dumazet16ba5e82009-11-02 12:10:39 +0100336 goto out_unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337 }
338 }
339
340 /* ipv4 addr of the socket is invalid. Only the
341 * unspecified and mapped address have a v4 equivalent.
342 */
343 v4addr = LOOPBACK4_IPV6;
344 if (!(addr_type & IPV6_ADDR_MULTICAST)) {
Maciej Żenczykowskif74024d2011-11-07 14:57:21 +0000345 if (!(inet->freebind || inet->transparent) &&
Balazs Scheidler0a513f62010-10-21 16:10:03 +0200346 !ipv6_chk_addr(net, &addr->sin6_addr,
Daniel Lezcanobfeade02008-01-10 22:43:18 -0800347 dev, 0)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348 err = -EADDRNOTAVAIL;
Eric Dumazet16ba5e82009-11-02 12:10:39 +0100349 goto out_unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350 }
351 }
Eric Dumazet16ba5e82009-11-02 12:10:39 +0100352 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353 }
354 }
355
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000356 inet->inet_rcv_saddr = v4addr;
357 inet->inet_saddr = v4addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358
Eric Dumazetefe42082013-10-03 15:42:29 -0700359 sk->sk_v6_rcv_saddr = addr->sin6_addr;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900360
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361 if (!(addr_type & IPV6_ADDR_MULTICAST))
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +0000362 np->saddr = addr->sin6_addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363
364 /* Make sure we are allowed to bind here. */
365 if (sk->sk_prot->get_port(sk, snum)) {
366 inet_reset_saddr(sk);
367 err = -EADDRINUSE;
368 goto out;
369 }
370
Vlad Yasevich0f8d3c72009-03-24 16:24:49 +0000371 if (addr_type != IPV6_ADDR_ANY) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372 sk->sk_userlocks |= SOCK_BINDADDR_LOCK;
Vlad Yasevich0f8d3c72009-03-24 16:24:49 +0000373 if (addr_type != IPV6_ADDR_MAPPED)
Eric Dumazet9fe516b2014-06-27 08:36:16 -0700374 sk->sk_ipv6only = 1;
Vlad Yasevich0f8d3c72009-03-24 16:24:49 +0000375 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376 if (snum)
377 sk->sk_userlocks |= SOCK_BINDPORT_LOCK;
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000378 inet->inet_sport = htons(inet->inet_num);
379 inet->inet_dport = 0;
380 inet->inet_daddr = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381out:
382 release_sock(sk);
383 return err;
Eric Dumazet16ba5e82009-11-02 12:10:39 +0100384out_unlock:
385 rcu_read_unlock();
386 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387}
YOSHIFUJI Hideaki71590392007-02-22 22:05:40 +0900388EXPORT_SYMBOL(inet6_bind);
389
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390int inet6_release(struct socket *sock)
391{
392 struct sock *sk = sock->sk;
393
394 if (sk == NULL)
395 return -EINVAL;
396
397 /* Free mc lists */
398 ipv6_sock_mc_close(sk);
399
400 /* Free ac lists */
401 ipv6_sock_ac_close(sk);
402
403 return inet_release(sock);
404}
YOSHIFUJI Hideaki71590392007-02-22 22:05:40 +0900405EXPORT_SYMBOL(inet6_release);
406
Brian Haley7d06b2e2008-06-14 17:04:49 -0700407void inet6_destroy_sock(struct sock *sk)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408{
409 struct ipv6_pinfo *np = inet6_sk(sk);
410 struct sk_buff *skb;
411 struct ipv6_txoptions *opt;
412
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413 /* Release rx options */
414
Eldad Zack647c0c72012-05-05 10:13:53 +0000415 skb = xchg(&np->pktoptions, NULL);
416 if (skb != NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417 kfree_skb(skb);
418
Eldad Zack647c0c72012-05-05 10:13:53 +0000419 skb = xchg(&np->rxpmtu, NULL);
420 if (skb != NULL)
Brian Haley4b340ae2010-04-23 11:26:09 +0000421 kfree_skb(skb);
422
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423 /* Free flowlabels */
424 fl6_free_socklist(sk);
425
426 /* Free tx options */
427
Eldad Zack647c0c72012-05-05 10:13:53 +0000428 opt = xchg(&np->opt, NULL);
429 if (opt != NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430 sock_kfree_s(sk, opt, opt->tot_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431}
Arnaldo Carvalho de Melo3cf3dc62005-12-13 23:23:20 -0800432EXPORT_SYMBOL_GPL(inet6_destroy_sock);
433
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434/*
435 * This does both peername and sockname.
436 */
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900437
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
439 int *uaddr_len, int peer)
440{
Eldad Zack647c0c72012-05-05 10:13:53 +0000441 struct sockaddr_in6 *sin = (struct sockaddr_in6 *)uaddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442 struct sock *sk = sock->sk;
443 struct inet_sock *inet = inet_sk(sk);
444 struct ipv6_pinfo *np = inet6_sk(sk);
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900445
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446 sin->sin6_family = AF_INET6;
447 sin->sin6_flowinfo = 0;
448 sin->sin6_scope_id = 0;
449 if (peer) {
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000450 if (!inet->inet_dport)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451 return -ENOTCONN;
452 if (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) &&
453 peer == 1)
454 return -ENOTCONN;
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000455 sin->sin6_port = inet->inet_dport;
Eric Dumazetefe42082013-10-03 15:42:29 -0700456 sin->sin6_addr = sk->sk_v6_daddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457 if (np->sndflow)
458 sin->sin6_flowinfo = np->flow_label;
459 } else {
Eric Dumazetefe42082013-10-03 15:42:29 -0700460 if (ipv6_addr_any(&sk->sk_v6_rcv_saddr))
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +0000461 sin->sin6_addr = np->saddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462 else
Eric Dumazetefe42082013-10-03 15:42:29 -0700463 sin->sin6_addr = sk->sk_v6_rcv_saddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464
Eric Dumazetc720c7e2009-10-15 06:30:45 +0000465 sin->sin6_port = inet->inet_sport;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700466 }
Hannes Frederic Sowa842df072013-03-08 02:07:19 +0000467 sin->sin6_scope_id = ipv6_iface_scope_id(&sin->sin6_addr,
468 sk->sk_bound_dev_if);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469 *uaddr_len = sizeof(*sin);
Eric Dumazeta02cec22010-09-22 20:43:57 +0000470 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471}
YOSHIFUJI Hideaki71590392007-02-22 22:05:40 +0900472EXPORT_SYMBOL(inet6_getname);
473
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
475{
476 struct sock *sk = sock->sk;
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +0900477 struct net *net = sock_net(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478
Eldad Zack647c0c72012-05-05 10:13:53 +0000479 switch (cmd) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480 case SIOCGSTAMP:
481 return sock_get_timestamp(sk, (struct timeval __user *)arg);
482
Eric Dumazetae40eb12007-03-18 17:33:16 -0700483 case SIOCGSTAMPNS:
484 return sock_get_timestampns(sk, (struct timespec __user *)arg);
485
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486 case SIOCADDRT:
487 case SIOCDELRT:
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900488
Eric Dumazeta02cec22010-09-22 20:43:57 +0000489 return ipv6_route_ioctl(net, cmd, (void __user *)arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490
491 case SIOCSIFADDR:
Daniel Lezcanoaf284932008-03-05 10:46:57 -0800492 return addrconf_add_ifaddr(net, (void __user *) arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493 case SIOCDIFADDR:
Daniel Lezcanoaf284932008-03-05 10:46:57 -0800494 return addrconf_del_ifaddr(net, (void __user *) arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495 case SIOCSIFDSTADDR:
Daniel Lezcanoaf284932008-03-05 10:46:57 -0800496 return addrconf_set_dstaddr(net, (void __user *) arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700497 default:
Christoph Hellwigb5e5fa52006-01-03 14:18:33 -0800498 if (!sk->sk_prot->ioctl)
499 return -ENOIOCTLCMD;
500 return sk->sk_prot->ioctl(sk, cmd, arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501 }
502 /*NOTREACHED*/
Eric Dumazeta02cec22010-09-22 20:43:57 +0000503 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504}
YOSHIFUJI Hideaki71590392007-02-22 22:05:40 +0900505EXPORT_SYMBOL(inet6_ioctl);
506
Eric Dumazet90ddc4f2005-12-22 12:49:22 -0800507const struct proto_ops inet6_stream_ops = {
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800508 .family = PF_INET6,
509 .owner = THIS_MODULE,
510 .release = inet6_release,
511 .bind = inet6_bind,
512 .connect = inet_stream_connect, /* ok */
513 .socketpair = sock_no_socketpair, /* a do nothing */
514 .accept = inet_accept, /* ok */
515 .getname = inet6_getname,
516 .poll = tcp_poll, /* ok */
517 .ioctl = inet6_ioctl, /* must change */
518 .listen = inet_listen, /* ok */
519 .shutdown = inet_shutdown, /* ok */
520 .setsockopt = sock_common_setsockopt, /* ok */
521 .getsockopt = sock_common_getsockopt, /* ok */
Changli Gao7ba42912010-07-10 20:41:55 +0000522 .sendmsg = inet_sendmsg, /* ok */
523 .recvmsg = inet_recvmsg, /* ok */
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800524 .mmap = sock_no_mmap,
Changli Gao7ba42912010-07-10 20:41:55 +0000525 .sendpage = inet_sendpage,
Jens Axboea0974dd2007-11-06 23:31:58 -0800526 .splice_read = tcp_splice_read,
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800527#ifdef CONFIG_COMPAT
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800528 .compat_setsockopt = compat_sock_common_setsockopt,
529 .compat_getsockopt = compat_sock_common_getsockopt,
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800530#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700531};
532
Eric Dumazet90ddc4f2005-12-22 12:49:22 -0800533const struct proto_ops inet6_dgram_ops = {
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800534 .family = PF_INET6,
535 .owner = THIS_MODULE,
536 .release = inet6_release,
537 .bind = inet6_bind,
538 .connect = inet_dgram_connect, /* ok */
539 .socketpair = sock_no_socketpair, /* a do nothing */
540 .accept = sock_no_accept, /* a do nothing */
541 .getname = inet6_getname,
542 .poll = udp_poll, /* ok */
543 .ioctl = inet6_ioctl, /* must change */
544 .listen = sock_no_listen, /* ok */
545 .shutdown = inet_shutdown, /* ok */
546 .setsockopt = sock_common_setsockopt, /* ok */
547 .getsockopt = sock_common_getsockopt, /* ok */
548 .sendmsg = inet_sendmsg, /* ok */
Changli Gao7ba42912010-07-10 20:41:55 +0000549 .recvmsg = inet_recvmsg, /* ok */
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800550 .mmap = sock_no_mmap,
551 .sendpage = sock_no_sendpage,
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800552#ifdef CONFIG_COMPAT
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800553 .compat_setsockopt = compat_sock_common_setsockopt,
554 .compat_getsockopt = compat_sock_common_getsockopt,
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800555#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556};
557
Stephen Hemmingerec1b4cf2009-10-05 05:58:39 +0000558static const struct net_proto_family inet6_family_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559 .family = PF_INET6,
560 .create = inet6_create,
561 .owner = THIS_MODULE,
562};
563
Daniel Lezcano87c3efb2007-12-11 02:25:01 -0800564int inet6_register_protosw(struct inet_protosw *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700565{
566 struct list_head *lh;
567 struct inet_protosw *answer;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568 struct list_head *last_perm;
Daniel Lezcano87c3efb2007-12-11 02:25:01 -0800569 int protocol = p->protocol;
570 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700571
572 spin_lock_bh(&inetsw6_lock);
573
Daniel Lezcano87c3efb2007-12-11 02:25:01 -0800574 ret = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575 if (p->type >= SOCK_MAX)
576 goto out_illegal;
577
578 /* If we are trying to override a permanent protocol, bail. */
579 answer = NULL;
Daniel Lezcano87c3efb2007-12-11 02:25:01 -0800580 ret = -EPERM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581 last_perm = &inetsw6[p->type];
582 list_for_each(lh, &inetsw6[p->type]) {
583 answer = list_entry(lh, struct inet_protosw, list);
584
585 /* Check only the non-wild match. */
586 if (INET_PROTOSW_PERMANENT & answer->flags) {
587 if (protocol == answer->protocol)
588 break;
589 last_perm = lh;
590 }
591
592 answer = NULL;
593 }
594 if (answer)
595 goto out_permanent;
596
597 /* Add the new entry after the last permanent entry if any, so that
598 * the new entry does not override a permanent entry when matched with
599 * a wild-card protocol. But it is allowed to override any existing
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900600 * non-permanent entry. This means that when we remove this entry, the
Linus Torvalds1da177e2005-04-16 15:20:36 -0700601 * system automatically returns to the old behavior.
602 */
603 list_add_rcu(&p->list, last_perm);
Daniel Lezcano87c3efb2007-12-11 02:25:01 -0800604 ret = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605out:
606 spin_unlock_bh(&inetsw6_lock);
Daniel Lezcano87c3efb2007-12-11 02:25:01 -0800607 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608
609out_permanent:
Joe Perchesf3213832012-05-15 14:11:53 +0000610 pr_err("Attempt to override permanent protocol %d\n", protocol);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700611 goto out;
612
613out_illegal:
Joe Perchesf3213832012-05-15 14:11:53 +0000614 pr_err("Ignoring attempt to register invalid socket type %d\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700615 p->type);
616 goto out;
617}
YOSHIFUJI Hideaki71590392007-02-22 22:05:40 +0900618EXPORT_SYMBOL(inet6_register_protosw);
619
Linus Torvalds1da177e2005-04-16 15:20:36 -0700620void
621inet6_unregister_protosw(struct inet_protosw *p)
622{
623 if (INET_PROTOSW_PERMANENT & p->flags) {
Joe Perchesf3213832012-05-15 14:11:53 +0000624 pr_err("Attempt to unregister permanent protocol %d\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700625 p->protocol);
626 } else {
627 spin_lock_bh(&inetsw6_lock);
628 list_del_rcu(&p->list);
629 spin_unlock_bh(&inetsw6_lock);
630
631 synchronize_net();
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{
Arnaldo Carvalho de Melob9750ce2005-12-13 23:22:54 -0800638 struct ipv6_pinfo *np = inet6_sk(sk);
David S. Miller68d0c6d2011-03-01 13:19:07 -0800639 struct dst_entry *dst;
Arnaldo Carvalho de Melob9750ce2005-12-13 23:22:54 -0800640
641 dst = __sk_dst_check(sk, np->dst_cookie);
642
643 if (dst == NULL) {
644 struct inet_sock *inet = inet_sk(sk);
Arnaud Ebalard20c59de2010-06-01 21:35:01 +0000645 struct in6_addr *final_p, final;
David S. Miller4c9483b2011-03-12 16:22:43 -0500646 struct flowi6 fl6;
Arnaldo Carvalho de Melob9750ce2005-12-13 23:22:54 -0800647
David S. Miller4c9483b2011-03-12 16:22:43 -0500648 memset(&fl6, 0, sizeof(fl6));
649 fl6.flowi6_proto = sk->sk_protocol;
Eric Dumazetefe42082013-10-03 15:42:29 -0700650 fl6.daddr = sk->sk_v6_daddr;
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +0000651 fl6.saddr = np->saddr;
David S. Miller4c9483b2011-03-12 16:22:43 -0500652 fl6.flowlabel = np->flow_label;
653 fl6.flowi6_oif = sk->sk_bound_dev_if;
654 fl6.flowi6_mark = sk->sk_mark;
David S. Miller1958b852011-03-12 16:36:19 -0500655 fl6.fl6_dport = inet->inet_dport;
656 fl6.fl6_sport = inet->inet_sport;
David S. Miller4c9483b2011-03-12 16:22:43 -0500657 security_sk_classify_flow(sk, flowi6_to_flowi(&fl6));
Arnaldo Carvalho de Melob9750ce2005-12-13 23:22:54 -0800658
David S. Miller4c9483b2011-03-12 16:22:43 -0500659 final_p = fl6_update_dst(&fl6, np->opt, &final);
Arnaldo Carvalho de Melob9750ce2005-12-13 23:22:54 -0800660
Steffen Klassert0e0d44a2013-08-28 08:04:14 +0200661 dst = ip6_dst_lookup_flow(sk, &fl6, final_p);
David S. Miller68d0c6d2011-03-01 13:19:07 -0800662 if (IS_ERR(dst)) {
Arnaldo Carvalho de Melob9750ce2005-12-13 23:22:54 -0800663 sk->sk_route_caps = 0;
David S. Miller68d0c6d2011-03-01 13:19:07 -0800664 sk->sk_err_soft = -PTR_ERR(dst);
665 return PTR_ERR(dst);
Arnaldo Carvalho de Melob9750ce2005-12-13 23:22:54 -0800666 }
667
YOSHIFUJI Hideaki8e1ef0a2006-08-29 17:15:09 -0700668 __ip6_dst_store(sk, dst, NULL, NULL);
Arnaldo Carvalho de Melob9750ce2005-12-13 23:22:54 -0800669 }
670
671 return 0;
672}
Arnaldo Carvalho de Melob9750ce2005-12-13 23:22:54 -0800673EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header);
674
Eric Dumazeta2247722014-09-27 09:50:56 -0700675bool ipv6_opt_accepted(const struct sock *sk, const struct sk_buff *skb,
676 const struct inet6_skb_parm *opt)
Arnaldo Carvalho de Melo399c07d2005-12-13 23:24:28 -0800677{
Eric Dumazet92113bf2012-05-18 08:14:11 +0200678 const struct ipv6_pinfo *np = inet6_sk(sk);
Arnaldo Carvalho de Melo399c07d2005-12-13 23:24:28 -0800679
680 if (np->rxopt.all) {
681 if ((opt->hop && (np->rxopt.bits.hopopts ||
682 np->rxopt.bits.ohopopts)) ||
Florent Fourcotac1eabc2013-12-08 15:47:01 +0100683 (ip6_flowinfo((struct ipv6hdr *) skb_network_header(skb)) &&
Arnaldo Carvalho de Melo399c07d2005-12-13 23:24:28 -0800684 np->rxopt.bits.rxflow) ||
685 (opt->srcrt && (np->rxopt.bits.srcrt ||
686 np->rxopt.bits.osrcrt)) ||
687 ((opt->dst1 || opt->dst0) &&
688 (np->rxopt.bits.dstopts || np->rxopt.bits.odstopts)))
Eric Dumazet92113bf2012-05-18 08:14:11 +0200689 return true;
Arnaldo Carvalho de Melo399c07d2005-12-13 23:24:28 -0800690 }
Eric Dumazet92113bf2012-05-18 08:14:11 +0200691 return false;
Arnaldo Carvalho de Melo399c07d2005-12-13 23:24:28 -0800692}
Arnaldo Carvalho de Melo399c07d2005-12-13 23:24:28 -0800693EXPORT_SYMBOL_GPL(ipv6_opt_accepted);
694
Stephen Hemminger7546dd92009-03-09 08:18:29 +0000695static struct packet_type ipv6_packet_type __read_mostly = {
Harvey Harrison09640e62009-02-01 00:45:17 -0800696 .type = cpu_to_be16(ETH_P_IPV6),
YOSHIFUJI Hideaki662397f2008-02-27 23:14:03 +0900697 .func = ipv6_rcv,
Vlad Yasevich22061d82012-11-15 08:49:11 +0000698};
699
YOSHIFUJI Hideaki662397f2008-02-27 23:14:03 +0900700static int __init ipv6_packet_init(void)
701{
702 dev_add_pack(&ipv6_packet_type);
703 return 0;
704}
705
706static void ipv6_packet_cleanup(void)
707{
708 dev_remove_pack(&ipv6_packet_type);
709}
710
Denis V. Luneve43291c2008-10-07 14:48:53 -0700711static int __net_init ipv6_init_mibs(struct net *net)
712{
John Stultz827da442013-10-07 15:51:58 -0700713 int i;
714
WANG Cong698365f2014-05-05 15:55:55 -0700715 net->mib.udp_stats_in6 = alloc_percpu(struct udp_mib);
716 if (!net->mib.udp_stats_in6)
Denis V. Lunev0c7ed672008-10-07 14:49:36 -0700717 return -ENOMEM;
WANG Cong698365f2014-05-05 15:55:55 -0700718 net->mib.udplite_stats_in6 = alloc_percpu(struct udp_mib);
719 if (!net->mib.udplite_stats_in6)
Denis V. Lunevbe713a42008-10-07 14:50:06 -0700720 goto err_udplite_mib;
WANG Cong698365f2014-05-05 15:55:55 -0700721 net->mib.ipv6_statistics = alloc_percpu(struct ipstats_mib);
722 if (!net->mib.ipv6_statistics)
Denis V. Lunev9261e532008-10-08 10:36:03 -0700723 goto err_ip_mib;
John Stultz827da442013-10-07 15:51:58 -0700724
725 for_each_possible_cpu(i) {
726 struct ipstats_mib *af_inet6_stats;
WANG Cong698365f2014-05-05 15:55:55 -0700727 af_inet6_stats = per_cpu_ptr(net->mib.ipv6_statistics, i);
John Stultz827da442013-10-07 15:51:58 -0700728 u64_stats_init(&af_inet6_stats->syncp);
John Stultz827da442013-10-07 15:51:58 -0700729 }
730
731
WANG Cong698365f2014-05-05 15:55:55 -0700732 net->mib.icmpv6_statistics = alloc_percpu(struct icmpv6_mib);
733 if (!net->mib.icmpv6_statistics)
Denis V. Lunev9261e532008-10-08 10:36:03 -0700734 goto err_icmp_mib;
Eric Dumazet2a244442011-11-13 01:24:04 +0000735 net->mib.icmpv6msg_statistics = kzalloc(sizeof(struct icmpv6msg_mib),
736 GFP_KERNEL);
737 if (!net->mib.icmpv6msg_statistics)
Denis V. Lunev9261e532008-10-08 10:36:03 -0700738 goto err_icmpmsg_mib;
Denis V. Luneve43291c2008-10-07 14:48:53 -0700739 return 0;
Denis V. Lunevbe713a42008-10-07 14:50:06 -0700740
Denis V. Lunev9261e532008-10-08 10:36:03 -0700741err_icmpmsg_mib:
WANG Cong698365f2014-05-05 15:55:55 -0700742 free_percpu(net->mib.icmpv6_statistics);
Denis V. Lunev9261e532008-10-08 10:36:03 -0700743err_icmp_mib:
WANG Cong698365f2014-05-05 15:55:55 -0700744 free_percpu(net->mib.ipv6_statistics);
Denis V. Lunev9261e532008-10-08 10:36:03 -0700745err_ip_mib:
WANG Cong698365f2014-05-05 15:55:55 -0700746 free_percpu(net->mib.udplite_stats_in6);
Denis V. Lunevbe713a42008-10-07 14:50:06 -0700747err_udplite_mib:
WANG Cong698365f2014-05-05 15:55:55 -0700748 free_percpu(net->mib.udp_stats_in6);
Denis V. Lunevbe713a42008-10-07 14:50:06 -0700749 return -ENOMEM;
Denis V. Luneve43291c2008-10-07 14:48:53 -0700750}
751
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +0000752static void ipv6_cleanup_mibs(struct net *net)
Denis V. Luneve43291c2008-10-07 14:48:53 -0700753{
WANG Cong698365f2014-05-05 15:55:55 -0700754 free_percpu(net->mib.udp_stats_in6);
755 free_percpu(net->mib.udplite_stats_in6);
756 free_percpu(net->mib.ipv6_statistics);
757 free_percpu(net->mib.icmpv6_statistics);
Eric Dumazet2a244442011-11-13 01:24:04 +0000758 kfree(net->mib.icmpv6msg_statistics);
Denis V. Luneve43291c2008-10-07 14:48:53 -0700759}
760
Alexey Dobriyane7dc8492008-10-13 18:54:07 -0700761static int __net_init inet6_net_init(struct net *net)
Daniel Lezcano81c1c172008-01-10 02:48:33 -0800762{
Daniel Lezcano0c96d8c2008-03-21 04:14:17 -0700763 int err = 0;
764
Daniel Lezcano99bc9c42008-01-10 02:54:53 -0800765 net->ipv6.sysctl.bindv6only = 0;
Daniel Lezcano41a76902008-01-10 03:02:40 -0800766 net->ipv6.sysctl.icmpv6_time = 1*HZ;
Florent Fourcot6444f722014-01-17 17:15:05 +0100767 net->ipv6.sysctl.flowlabel_consistency = 1;
Tom Herbertcb1ce2e2014-07-01 21:33:10 -0700768 net->ipv6.sysctl.auto_flowlabels = 0;
Hannes Frederic Sowa812918c2014-10-06 19:58:37 +0200769 atomic_set(&net->ipv6.fib6_sernum, 1);
Daniel Lezcanoe71e0342008-01-10 02:56:03 -0800770
Denis V. Luneve43291c2008-10-07 14:48:53 -0700771 err = ipv6_init_mibs(net);
772 if (err)
773 return err;
Daniel Lezcano0c96d8c2008-03-21 04:14:17 -0700774#ifdef CONFIG_PROC_FS
775 err = udp6_proc_init(net);
776 if (err)
777 goto out;
Daniel Lezcano6f8b13b2008-03-21 04:14:45 -0700778 err = tcp6_proc_init(net);
779 if (err)
780 goto proc_tcp6_fail;
Daniel Lezcano6ab57e72008-03-26 16:52:32 -0700781 err = ac6_proc_init(net);
782 if (err)
783 goto proc_ac6_fail;
Daniel Lezcano0c96d8c2008-03-21 04:14:17 -0700784#endif
785 return err;
Daniel Lezcano6f8b13b2008-03-21 04:14:45 -0700786
787#ifdef CONFIG_PROC_FS
Daniel Lezcano6ab57e72008-03-26 16:52:32 -0700788proc_ac6_fail:
789 tcp6_proc_exit(net);
Daniel Lezcano6f8b13b2008-03-21 04:14:45 -0700790proc_tcp6_fail:
791 udp6_proc_exit(net);
Denis V. Luneve43291c2008-10-07 14:48:53 -0700792out:
793 ipv6_cleanup_mibs(net);
794 return err;
Daniel Lezcano6f8b13b2008-03-21 04:14:45 -0700795#endif
Daniel Lezcano81c1c172008-01-10 02:48:33 -0800796}
797
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +0000798static void __net_exit inet6_net_exit(struct net *net)
Daniel Lezcano81c1c172008-01-10 02:48:33 -0800799{
Daniel Lezcano0c96d8c2008-03-21 04:14:17 -0700800#ifdef CONFIG_PROC_FS
801 udp6_proc_exit(net);
Daniel Lezcano6f8b13b2008-03-21 04:14:45 -0700802 tcp6_proc_exit(net);
Daniel Lezcano6ab57e72008-03-26 16:52:32 -0700803 ac6_proc_exit(net);
Daniel Lezcano0c96d8c2008-03-21 04:14:17 -0700804#endif
Denis V. Luneve43291c2008-10-07 14:48:53 -0700805 ipv6_cleanup_mibs(net);
Daniel Lezcano81c1c172008-01-10 02:48:33 -0800806}
807
808static struct pernet_operations inet6_net_ops = {
809 .init = inet6_net_init,
810 .exit = inet6_net_exit,
811};
812
Cong Wang5f81bd22013-08-31 13:44:30 +0800813static const struct ipv6_stub ipv6_stub_impl = {
814 .ipv6_sock_mc_join = ipv6_sock_mc_join,
815 .ipv6_sock_mc_drop = ipv6_sock_mc_drop,
816 .ipv6_dst_lookup = ip6_dst_lookup,
817 .udpv6_encap_enable = udpv6_encap_enable,
Cong Wangf564f452013-08-31 13:44:36 +0800818 .ndisc_send_na = ndisc_send_na,
Cong Wange15a00a2013-08-31 13:44:34 +0800819 .nd_tbl = &nd_tbl,
Cong Wang5f81bd22013-08-31 13:44:30 +0800820};
821
Linus Torvalds1da177e2005-04-16 15:20:36 -0700822static int __init inet6_init(void)
823{
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900824 struct list_head *r;
Brian Haleyfe7ca2e2009-03-04 03:18:11 -0800825 int err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700826
YOSHIFUJI Hideaki / 吉藤英明ba96bcb2013-01-09 07:19:43 +0000827 BUILD_BUG_ON(sizeof(struct inet6_skb_parm) > FIELD_SIZEOF(struct sk_buff, cb));
YOSHIFUJI Hideakief047f52006-09-01 00:29:06 -0700828
Brian Haleyfe7ca2e2009-03-04 03:18:11 -0800829 /* Register the socket-side information for inet6_create. */
Eldad Zack647c0c72012-05-05 10:13:53 +0000830 for (r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r)
Brian Haleyfe7ca2e2009-03-04 03:18:11 -0800831 INIT_LIST_HEAD(r);
832
Brian Haley56d417b2009-06-01 03:07:33 -0700833 if (disable_ipv6_mod) {
Joe Perchesf3213832012-05-15 14:11:53 +0000834 pr_info("Loaded, but administratively disabled, reboot required to enable\n");
Brian Haleyfe7ca2e2009-03-04 03:18:11 -0800835 goto out;
836 }
837
Linus Torvalds1da177e2005-04-16 15:20:36 -0700838 err = proto_register(&tcpv6_prot, 1);
839 if (err)
840 goto out;
841
842 err = proto_register(&udpv6_prot, 1);
843 if (err)
844 goto out_unregister_tcp_proto;
845
Gerrit Renkerba4e58e2006-11-27 11:10:57 -0800846 err = proto_register(&udplitev6_prot, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700847 if (err)
848 goto out_unregister_udp_proto;
849
Gerrit Renkerba4e58e2006-11-27 11:10:57 -0800850 err = proto_register(&rawv6_prot, 1);
851 if (err)
852 goto out_unregister_udplite_proto;
853
Lorenzo Colitti6d0bfe22013-05-22 20:17:31 +0000854 err = proto_register(&pingv6_prot, 1);
855 if (err)
856 goto out_unregister_ping_proto;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700857
Linus Torvalds1da177e2005-04-16 15:20:36 -0700858 /* We MUST register RAW sockets before we create the ICMP6,
859 * IGMP6, or NDISC control sockets.
860 */
Daniel Lezcano7f4e4862007-12-11 02:25:35 -0800861 err = rawv6_init();
862 if (err)
863 goto out_unregister_raw_proto;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700864
865 /* Register the family here so that the init calls below will
866 * be able to create sockets. (?? is this dangerous ??)
867 */
David S. Miller8eb55912005-11-11 15:05:47 -0800868 err = sock_register(&inet6_family_ops);
869 if (err)
Daniel Lezcano7f4e4862007-12-11 02:25:35 -0800870 goto out_sock_register_fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700871
Linus Torvalds1da177e2005-04-16 15:20:36 -0700872 /*
873 * ipngwg API draft makes clear that the correct semantics
874 * for TCP and UDP is to consider one TCP and UDP instance
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300875 * in a host available by both INET and INET6 APIs and
Linus Torvalds1da177e2005-04-16 15:20:36 -0700876 * able to communicate via both network protocols.
877 */
878
Daniel Lezcano81c1c172008-01-10 02:48:33 -0800879 err = register_pernet_subsys(&inet6_net_ops);
880 if (err)
881 goto register_pernet_fail;
Denis V. Lunev9b0f9762008-02-29 11:13:15 -0800882 err = icmpv6_init();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700883 if (err)
884 goto icmp_fail;
Wang Chen623d1a12008-07-03 12:13:30 +0800885 err = ip6_mr_init();
886 if (err)
887 goto ipmr_fail;
Denis V. Lunev9b0f9762008-02-29 11:13:15 -0800888 err = ndisc_init();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700889 if (err)
890 goto ndisc_fail;
Denis V. Lunev9b0f9762008-02-29 11:13:15 -0800891 err = igmp6_init();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700892 if (err)
893 goto igmp_fail;
Cong Wang5f81bd22013-08-31 13:44:30 +0800894
895 ipv6_stub = &ipv6_stub_impl;
896
Harald Welte2cc7d572005-08-09 19:42:34 -0700897 err = ipv6_netfilter_init();
898 if (err)
899 goto netfilter_fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700900 /* Create /proc/foo6 entries. */
901#ifdef CONFIG_PROC_FS
902 err = -ENOMEM;
903 if (raw6_proc_init())
904 goto proc_raw6_fail;
Gerrit Renkerba4e58e2006-11-27 11:10:57 -0800905 if (udplite6_proc_init())
906 goto proc_udplite6_fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700907 if (ipv6_misc_proc_init())
908 goto proc_misc6_fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700909 if (if6_proc_init())
910 goto proc_if6_fail;
911#endif
Daniel Lezcanoe2fddf52007-12-07 00:44:29 -0800912 err = ip6_route_init();
913 if (err)
914 goto ip6_route_fail;
Michal Kubeček2c861cc2013-09-09 21:45:04 +0200915 err = ndisc_late_init();
916 if (err)
917 goto ndisc_late_fail;
Daniel Lezcano0a3e78a2007-12-11 02:23:18 -0800918 err = ip6_flowlabel_init();
919 if (err)
920 goto ip6_flowlabel_fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700921 err = addrconf_init();
922 if (err)
923 goto addrconf_fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700924
925 /* Init v6 extension headers. */
Daniel Lezcano248b2382007-12-11 02:23:54 -0800926 err = ipv6_exthdrs_init();
927 if (err)
928 goto ipv6_exthdrs_fail;
929
Daniel Lezcano853cbba2007-12-11 02:24:29 -0800930 err = ipv6_frag_init();
931 if (err)
932 goto ipv6_frag_fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700933
934 /* Init v6 transport protocols. */
Daniel Lezcano7f4e4862007-12-11 02:25:35 -0800935 err = udpv6_init();
936 if (err)
937 goto udpv6_fail;
Herbert Xue2ed4052005-07-05 14:41:20 -0700938
Daniel Lezcano7f4e4862007-12-11 02:25:35 -0800939 err = udplitev6_init();
940 if (err)
941 goto udplitev6_fail;
942
943 err = tcpv6_init();
944 if (err)
945 goto tcpv6_fail;
946
947 err = ipv6_packet_init();
948 if (err)
949 goto ipv6_packet_fail;
Benjamin Thery94911fe2008-03-05 10:45:36 -0800950
Lorenzo Colitti6d0bfe22013-05-22 20:17:31 +0000951 err = pingv6_init();
952 if (err)
953 goto pingv6_fail;
954
Benjamin Thery94911fe2008-03-05 10:45:36 -0800955#ifdef CONFIG_SYSCTL
956 err = ipv6_sysctl_register();
957 if (err)
958 goto sysctl_fail;
959#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700960out:
961 return err;
962
Benjamin Thery94911fe2008-03-05 10:45:36 -0800963#ifdef CONFIG_SYSCTL
964sysctl_fail:
Vlad Yasevicheca42aa2013-11-16 15:17:24 -0500965 pingv6_exit();
Benjamin Thery94911fe2008-03-05 10:45:36 -0800966#endif
Lorenzo Colitti6d0bfe22013-05-22 20:17:31 +0000967pingv6_fail:
Vlad Yasevicheca42aa2013-11-16 15:17:24 -0500968 ipv6_packet_cleanup();
Daniel Lezcano7f4e4862007-12-11 02:25:35 -0800969ipv6_packet_fail:
970 tcpv6_exit();
971tcpv6_fail:
972 udplitev6_exit();
973udplitev6_fail:
974 udpv6_exit();
975udpv6_fail:
976 ipv6_frag_exit();
Daniel Lezcano853cbba2007-12-11 02:24:29 -0800977ipv6_frag_fail:
978 ipv6_exthdrs_exit();
Daniel Lezcano248b2382007-12-11 02:23:54 -0800979ipv6_exthdrs_fail:
980 addrconf_cleanup();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700981addrconf_fail:
982 ip6_flowlabel_cleanup();
Daniel Lezcano0a3e78a2007-12-11 02:23:18 -0800983ip6_flowlabel_fail:
Michal Kubeček2c861cc2013-09-09 21:45:04 +0200984 ndisc_late_cleanup();
985ndisc_late_fail:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700986 ip6_route_cleanup();
Daniel Lezcanoe2fddf52007-12-07 00:44:29 -0800987ip6_route_fail:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700988#ifdef CONFIG_PROC_FS
989 if6_proc_exit();
990proc_if6_fail:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700991 ipv6_misc_proc_exit();
992proc_misc6_fail:
Gerrit Renkerba4e58e2006-11-27 11:10:57 -0800993 udplite6_proc_exit();
994proc_udplite6_fail:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700995 raw6_proc_exit();
996proc_raw6_fail:
997#endif
Harald Welte2cc7d572005-08-09 19:42:34 -0700998 ipv6_netfilter_fini();
999netfilter_fail:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001000 igmp6_cleanup();
1001igmp_fail:
1002 ndisc_cleanup();
1003ndisc_fail:
Wang Chen623d1a12008-07-03 12:13:30 +08001004 ip6_mr_cleanup();
1005ipmr_fail:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001006 icmpv6_cleanup();
1007icmp_fail:
Daniel Lezcano81c1c172008-01-10 02:48:33 -08001008 unregister_pernet_subsys(&inet6_net_ops);
1009register_pernet_fail:
David S. Miller8eb55912005-11-11 15:05:47 -08001010 sock_unregister(PF_INET6);
Daniel Lezcanoe2fddf52007-12-07 00:44:29 -08001011 rtnl_unregister_all(PF_INET6);
Daniel Lezcano7f4e4862007-12-11 02:25:35 -08001012out_sock_register_fail:
1013 rawv6_exit();
Lorenzo Colitti6d0bfe22013-05-22 20:17:31 +00001014out_unregister_ping_proto:
1015 proto_unregister(&pingv6_prot);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001016out_unregister_raw_proto:
1017 proto_unregister(&rawv6_prot);
Gerrit Renkerba4e58e2006-11-27 11:10:57 -08001018out_unregister_udplite_proto:
1019 proto_unregister(&udplitev6_prot);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001020out_unregister_udp_proto:
1021 proto_unregister(&udpv6_prot);
1022out_unregister_tcp_proto:
1023 proto_unregister(&tcpv6_prot);
1024 goto out;
1025}
1026module_init(inet6_init);
1027
Linus Torvalds1da177e2005-04-16 15:20:36 -07001028MODULE_ALIAS_NETPROTO(PF_INET6);