blob: fe5262fd6aa5c2e270f910a8b0231ec3b2929a81 [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
Huw Daviescb72d382016-06-27 15:02:46 -040063#include <net/calipso.h>
David Lebrun915d7e52016-11-08 14:57:40 +010064#include <net/seg6.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070065
Linus Torvalds7c0f6ba2016-12-24 11:46:01 -080066#include <linux/uaccess.h>
YOSHIFUJI Hideaki7bc570c2008-04-03 09:22:53 +090067#include <linux/mroute6.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070068
Tom Herberta6024562016-04-05 08:22:51 -070069#include "ip6_offload.h"
70
Linus Torvalds1da177e2005-04-16 15:20:36 -070071MODULE_AUTHOR("Cast of dozens");
72MODULE_DESCRIPTION("IPv6 protocol stack for Linux");
73MODULE_LICENSE("GPL");
74
Pavel Emelyanovf1267342007-11-23 21:28:44 +080075/* The inetsw6 table contains everything that inet6_create needs to
Linus Torvalds1da177e2005-04-16 15:20:36 -070076 * build a new socket.
77 */
78static struct list_head inetsw6[SOCK_MAX];
79static DEFINE_SPINLOCK(inetsw6_lock);
80
Brian Haley56d417b2009-06-01 03:07:33 -070081struct ipv6_params ipv6_defaults = {
82 .disable_ipv6 = 0,
83 .autoconf = 1,
84};
85
Eldad Zack647c0c72012-05-05 10:13:53 +000086static int disable_ipv6_mod;
Brian Haley56d417b2009-06-01 03:07:33 -070087
88module_param_named(disable, disable_ipv6_mod, int, 0444);
89MODULE_PARM_DESC(disable, "Disable IPv6 module such that it is non-functional");
90
91module_param_named(disable_ipv6, ipv6_defaults.disable_ipv6, int, 0444);
92MODULE_PARM_DESC(disable_ipv6, "Disable IPv6 on all interfaces");
93
94module_param_named(autoconf, ipv6_defaults.autoconf, int, 0444);
95MODULE_PARM_DESC(autoconf, "Enable IPv6 address autoconfiguration on all interfaces");
Brian Haleyfe7ca2e2009-03-04 03:18:11 -080096
David Aherne4348632016-06-09 10:21:00 -070097bool ipv6_mod_enabled(void)
98{
99 return disable_ipv6_mod == 0;
100}
101EXPORT_SYMBOL_GPL(ipv6_mod_enabled);
102
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103static __inline__ struct ipv6_pinfo *inet6_sk_generic(struct sock *sk)
104{
105 const int offset = sk->sk_prot->obj_size - sizeof(struct ipv6_pinfo);
106
107 return (struct ipv6_pinfo *)(((u8 *)sk) + offset);
108}
109
Eric Paris3f378b682009-11-05 22:18:14 -0800110static int inet6_create(struct net *net, struct socket *sock, int protocol,
111 int kern)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112{
113 struct inet_sock *inet;
114 struct ipv6_pinfo *np;
115 struct sock *sk;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116 struct inet_protosw *answer;
117 struct proto *answer_prot;
118 unsigned char answer_flags;
YOSHIFUJI Hideakiaf1afe82005-12-02 20:56:57 -0800119 int try_loading_module = 0;
120 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121
Hannes Frederic Sowa79462ad02015-12-14 22:03:39 +0100122 if (protocol < 0 || protocol >= IPPROTO_MAX)
123 return -EINVAL;
124
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125 /* Look for the requested type/protocol pair. */
YOSHIFUJI Hideakiaf1afe82005-12-02 20:56:57 -0800126lookup_protocol:
127 err = -ESOCKTNOSUPPORT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128 rcu_read_lock();
Paul E. McKenney696adfe2008-07-25 01:45:34 -0700129 list_for_each_entry_rcu(answer, &inetsw6[sock->type], list) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130
Paul E. McKenney696adfe2008-07-25 01:45:34 -0700131 err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132 /* Check the non-wild match. */
133 if (protocol == answer->protocol) {
134 if (protocol != IPPROTO_IP)
135 break;
136 } else {
137 /* Check for the two wild cases. */
138 if (IPPROTO_IP == protocol) {
139 protocol = answer->protocol;
140 break;
141 }
142 if (IPPROTO_IP == answer->protocol)
143 break;
144 }
YOSHIFUJI Hideakiaf1afe82005-12-02 20:56:57 -0800145 err = -EPROTONOSUPPORT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146 }
147
Paul E. McKenney696adfe2008-07-25 01:45:34 -0700148 if (err) {
YOSHIFUJI Hideakiaf1afe82005-12-02 20:56:57 -0800149 if (try_loading_module < 2) {
150 rcu_read_unlock();
151 /*
152 * Be more specific, e.g. net-pf-10-proto-132-type-1
153 * (net-pf-PF_INET6-proto-IPPROTO_SCTP-type-SOCK_STREAM)
154 */
155 if (++try_loading_module == 1)
156 request_module("net-pf-%d-proto-%d-type-%d",
157 PF_INET6, protocol, sock->type);
158 /*
159 * Fall back to generic, e.g. net-pf-10-proto-132
160 * (net-pf-PF_INET6-proto-IPPROTO_SCTP)
161 */
162 else
163 request_module("net-pf-%d-proto-%d",
164 PF_INET6, protocol);
165 goto lookup_protocol;
166 } else
167 goto out_rcu_unlock;
168 }
169
170 err = -EPERM;
Eric W. Biedermanaf31f412012-11-16 03:03:06 +0000171 if (sock->type == SOCK_RAW && !kern &&
172 !ns_capable(net->user_ns, CAP_NET_RAW))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173 goto out_rcu_unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174
175 sock->ops = answer->ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176 answer_prot = answer->prot;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177 answer_flags = answer->flags;
178 rcu_read_unlock();
179
Ian Morris63159f22015-03-29 14:00:04 +0100180 WARN_ON(!answer_prot->slab);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181
YOSHIFUJI Hideakiaf1afe82005-12-02 20:56:57 -0800182 err = -ENOBUFS;
Eric W. Biederman11aa9c22015-05-08 21:09:13 -0500183 sk = sk_alloc(net, PF_INET6, GFP_KERNEL, answer_prot, kern);
Ian Morris63159f22015-03-29 14:00:04 +0100184 if (!sk)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185 goto out;
186
187 sock_init_data(sock, sk);
188
YOSHIFUJI Hideakiaf1afe82005-12-02 20:56:57 -0800189 err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190 if (INET_PROTOSW_REUSE & answer_flags)
Pavel Emelyanov4a17fd52012-04-19 03:39:36 +0000191 sk->sk_reuse = SK_CAN_REUSE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192
193 inet = inet_sk(sk);
Paul Moore469de9b2007-01-09 14:37:06 -0800194 inet->is_icsk = (INET_PROTOSW_ICSK & answer_flags) != 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195
196 if (SOCK_RAW == sock->type) {
Eric Dumazetc720c7e82009-10-15 06:30:45 +0000197 inet->inet_num = protocol;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198 if (IPPROTO_RAW == protocol)
199 inet->hdrincl = 1;
200 }
201
Arnaldo Carvalho de Meloe6848972005-08-09 19:45:38 -0700202 sk->sk_destruct = inet_sock_destruct;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203 sk->sk_family = PF_INET6;
204 sk->sk_protocol = protocol;
205
206 sk->sk_backlog_rcv = answer->prot->backlog_rcv;
207
208 inet_sk(sk)->pinet6 = np = inet6_sk_generic(sk);
209 np->hop_limit = -1;
David S. Millerf935aa92010-05-03 23:42:27 -0700210 np->mcast_hops = IPV6_DEFAULT_MCASTHOPS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211 np->mc_loop = 1;
212 np->pmtudisc = IPV6_PMTUDISC_WANT;
Jakub Sitnicki1f139ed2017-07-31 10:09:41 +0200213 np->autoflowlabel = ip6_default_np_autolabel(net);
Jakub Sitnicki22b67222017-08-23 09:55:41 +0200214 np->repflow = net->ipv6.sysctl.flowlabel_reflect;
Eric Dumazet9fe516b2014-06-27 08:36:16 -0700215 sk->sk_ipv6only = net->ipv6.sysctl.bindv6only;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900216
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217 /* Init the ipv4 part of the socket since we can have sockets
218 * using v6 API for ipv4.
219 */
220 inet->uc_ttl = -1;
221
222 inet->mc_loop = 1;
223 inet->mc_ttl = 1;
224 inet->mc_index = 0;
225 inet->mc_list = NULL;
Jiri Benc4c507d22012-02-09 09:35:49 +0000226 inet->rcv_tos = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227
Hannes Frederic Sowa974eda12013-12-14 05:13:38 +0100228 if (net->ipv4.sysctl_ip_no_pmtu_disc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229 inet->pmtudisc = IP_PMTUDISC_DONT;
230 else
231 inet->pmtudisc = IP_PMTUDISC_WANT;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900232 /*
Arnaldo Carvalho de Meloe6848972005-08-09 19:45:38 -0700233 * Increment only the relevant sk_prot->socks debug field, this changes
234 * the previous behaviour of incrementing both the equivalent to
235 * answer->prot->socks (inet6_sock_nr) and inet_sock_nr.
236 *
237 * This allows better debug granularity as we'll know exactly how many
238 * UDPv6, TCPv6, etc socks were allocated, not the sum of all IPv6
239 * transport protocol socks. -acme
240 */
241 sk_refcnt_debug_inc(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242
Eric Dumazetc720c7e82009-10-15 06:30:45 +0000243 if (inet->inet_num) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244 /* It assumes that any protocol which allows
245 * the user to assign a number at socket
246 * creation time automatically shares.
247 */
Eric Dumazetc720c7e82009-10-15 06:30:45 +0000248 inet->inet_sport = htons(inet->inet_num);
Craig Gallek086c6532016-02-10 11:50:35 -0500249 err = sk->sk_prot->hash(sk);
250 if (err) {
251 sk_common_release(sk);
252 goto out;
253 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700254 }
255 if (sk->sk_prot->init) {
YOSHIFUJI Hideakiaf1afe82005-12-02 20:56:57 -0800256 err = sk->sk_prot->init(sk);
257 if (err) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258 sk_common_release(sk);
259 goto out;
260 }
261 }
David Ahern610236582016-12-01 08:48:04 -0800262
263 if (!kern) {
264 err = BPF_CGROUP_RUN_PROG_INET_SOCK(sk);
265 if (err) {
266 sk_common_release(sk);
267 goto out;
268 }
269 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270out:
YOSHIFUJI Hideakiaf1afe82005-12-02 20:56:57 -0800271 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272out_rcu_unlock:
273 rcu_read_unlock();
274 goto out;
275}
276
277
278/* bind for INET6 API */
279int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
280{
Eldad Zack647c0c72012-05-05 10:13:53 +0000281 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)uaddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282 struct sock *sk = sock->sk;
283 struct inet_sock *inet = inet_sk(sk);
284 struct ipv6_pinfo *np = inet6_sk(sk);
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +0900285 struct net *net = sock_net(sk);
Al Virofd683222006-09-26 22:17:51 -0700286 __be32 v4addr = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287 unsigned short snum;
288 int addr_type = 0;
289 int err = 0;
290
291 /* If the socket has its own bind function then use it. */
292 if (sk->sk_prot->bind)
293 return sk->sk_prot->bind(sk, uaddr, addr_len);
294
295 if (addr_len < SIN6_LEN_RFC2133)
296 return -EINVAL;
Marcus Meissner5a079c32011-06-06 06:00:07 +0000297
298 if (addr->sin6_family != AF_INET6)
Marcus Meissnerc349a522011-07-04 01:30:29 +0000299 return -EAFNOSUPPORT;
Marcus Meissner5a079c32011-06-06 06:00:07 +0000300
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301 addr_type = ipv6_addr_type(&addr->sin6_addr);
302 if ((addr_type & IPV6_ADDR_MULTICAST) && sock->type == SOCK_STREAM)
303 return -EINVAL;
304
305 snum = ntohs(addr->sin6_port);
Krister Johansen4548b682017-01-20 17:49:11 -0800306 if (snum && snum < inet_prot_sock(net) &&
307 !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308 return -EACCES;
309
310 lock_sock(sk);
311
312 /* Check these errors (active socket, double bind). */
Eric Dumazetc720c7e82009-10-15 06:30:45 +0000313 if (sk->sk_state != TCP_CLOSE || inet->inet_num) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314 err = -EINVAL;
315 goto out;
316 }
317
318 /* Check if the address belongs to the host. */
319 if (addr_type == IPV6_ADDR_MAPPED) {
Vlad Yasevich63d99502009-03-24 16:24:50 +0000320 int chk_addr_ret;
321
Vlad Yasevich783ed5a2009-03-24 16:24:48 +0000322 /* Binding to v4-mapped address on a v6-only socket
323 * makes no sense
324 */
Eric Dumazet9fe516b2014-06-27 08:36:16 -0700325 if (sk->sk_ipv6only) {
Vlad Yasevich783ed5a2009-03-24 16:24:48 +0000326 err = -EINVAL;
327 goto out;
328 }
Vlad Yasevich63d99502009-03-24 16:24:50 +0000329
Uwe Kleine-Königa34f0b32010-12-10 14:55:42 +0100330 /* Reproduce AF_INET checks to make the bindings consistent */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331 v4addr = addr->sin6_addr.s6_addr32[3];
Vlad Yasevich63d99502009-03-24 16:24:50 +0000332 chk_addr_ret = inet_addr_type(net, v4addr);
Vincent Bernat49a60152014-09-05 15:09:03 +0200333 if (!net->ipv4.sysctl_ip_nonlocal_bind &&
Vlad Yasevich63d99502009-03-24 16:24:50 +0000334 !(inet->freebind || inet->transparent) &&
335 v4addr != htonl(INADDR_ANY) &&
336 chk_addr_ret != RTN_LOCAL &&
337 chk_addr_ret != RTN_MULTICAST &&
Bruno Prémontca6982b2009-08-23 19:06:28 -0700338 chk_addr_ret != RTN_BROADCAST) {
339 err = -EADDRNOTAVAIL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340 goto out;
Bruno Prémontca6982b2009-08-23 19:06:28 -0700341 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342 } else {
343 if (addr_type != IPV6_ADDR_ANY) {
344 struct net_device *dev = NULL;
345
Eric Dumazet16ba5e82009-11-02 12:10:39 +0100346 rcu_read_lock();
Hannes Frederic Sowa842df072013-03-08 02:07:19 +0000347 if (__ipv6_addr_needs_scope_id(addr_type)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700348 if (addr_len >= sizeof(struct sockaddr_in6) &&
349 addr->sin6_scope_id) {
350 /* Override any existing binding, if another one
351 * is supplied by user.
352 */
353 sk->sk_bound_dev_if = addr->sin6_scope_id;
354 }
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900355
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356 /* Binding to link-local address requires an interface */
357 if (!sk->sk_bound_dev_if) {
358 err = -EINVAL;
Eric Dumazet16ba5e82009-11-02 12:10:39 +0100359 goto out_unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360 }
Eric Dumazet16ba5e82009-11-02 12:10:39 +0100361 dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362 if (!dev) {
363 err = -ENODEV;
Eric Dumazet16ba5e82009-11-02 12:10:39 +0100364 goto out_unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365 }
366 }
367
368 /* ipv4 addr of the socket is invalid. Only the
369 * unspecified and mapped address have a v4 equivalent.
370 */
371 v4addr = LOOPBACK4_IPV6;
372 if (!(addr_type & IPV6_ADDR_MULTICAST)) {
Tom Herbert35a256f2015-07-08 16:58:22 -0700373 if (!net->ipv6.sysctl.ip_nonlocal_bind &&
374 !(inet->freebind || inet->transparent) &&
Balazs Scheidler0a513f62010-10-21 16:10:03 +0200375 !ipv6_chk_addr(net, &addr->sin6_addr,
Daniel Lezcanobfeade02008-01-10 22:43:18 -0800376 dev, 0)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377 err = -EADDRNOTAVAIL;
Eric Dumazet16ba5e82009-11-02 12:10:39 +0100378 goto out_unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379 }
380 }
Eric Dumazet16ba5e82009-11-02 12:10:39 +0100381 rcu_read_unlock();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700382 }
383 }
384
Eric Dumazetc720c7e82009-10-15 06:30:45 +0000385 inet->inet_rcv_saddr = v4addr;
386 inet->inet_saddr = v4addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387
Eric Dumazetefe42082013-10-03 15:42:29 -0700388 sk->sk_v6_rcv_saddr = addr->sin6_addr;
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900389
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390 if (!(addr_type & IPV6_ADDR_MULTICAST))
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +0000391 np->saddr = addr->sin6_addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392
393 /* Make sure we are allowed to bind here. */
Eric Dumazet90c337d2015-06-06 21:17:57 -0700394 if ((snum || !inet->bind_address_no_port) &&
395 sk->sk_prot->get_port(sk, snum)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396 inet_reset_saddr(sk);
397 err = -EADDRINUSE;
398 goto out;
399 }
400
Vlad Yasevich0f8d3c72009-03-24 16:24:49 +0000401 if (addr_type != IPV6_ADDR_ANY) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402 sk->sk_userlocks |= SOCK_BINDADDR_LOCK;
Vlad Yasevich0f8d3c72009-03-24 16:24:49 +0000403 if (addr_type != IPV6_ADDR_MAPPED)
Eric Dumazet9fe516b2014-06-27 08:36:16 -0700404 sk->sk_ipv6only = 1;
Vlad Yasevich0f8d3c72009-03-24 16:24:49 +0000405 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406 if (snum)
407 sk->sk_userlocks |= SOCK_BINDPORT_LOCK;
Eric Dumazetc720c7e82009-10-15 06:30:45 +0000408 inet->inet_sport = htons(inet->inet_num);
409 inet->inet_dport = 0;
410 inet->inet_daddr = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411out:
412 release_sock(sk);
413 return err;
Eric Dumazet16ba5e82009-11-02 12:10:39 +0100414out_unlock:
415 rcu_read_unlock();
416 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700417}
YOSHIFUJI Hideaki71590392007-02-22 22:05:40 +0900418EXPORT_SYMBOL(inet6_bind);
419
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420int inet6_release(struct socket *sock)
421{
422 struct sock *sk = sock->sk;
423
Ian Morris63159f22015-03-29 14:00:04 +0100424 if (!sk)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425 return -EINVAL;
426
427 /* Free mc lists */
428 ipv6_sock_mc_close(sk);
429
430 /* Free ac lists */
431 ipv6_sock_ac_close(sk);
432
433 return inet_release(sock);
434}
YOSHIFUJI Hideaki71590392007-02-22 22:05:40 +0900435EXPORT_SYMBOL(inet6_release);
436
Brian Haley7d06b2e2008-06-14 17:04:49 -0700437void inet6_destroy_sock(struct sock *sk)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438{
439 struct ipv6_pinfo *np = inet6_sk(sk);
440 struct sk_buff *skb;
441 struct ipv6_txoptions *opt;
442
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443 /* Release rx options */
444
Eldad Zack647c0c72012-05-05 10:13:53 +0000445 skb = xchg(&np->pktoptions, NULL);
Ian Morris53b24b82015-03-29 14:00:05 +0100446 if (skb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447 kfree_skb(skb);
448
Eldad Zack647c0c72012-05-05 10:13:53 +0000449 skb = xchg(&np->rxpmtu, NULL);
Ian Morris53b24b82015-03-29 14:00:05 +0100450 if (skb)
Brian Haley4b340ae2010-04-23 11:26:09 +0000451 kfree_skb(skb);
452
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453 /* Free flowlabels */
454 fl6_free_socklist(sk);
455
456 /* Free tx options */
457
Eric Dumazet45f6fad2015-11-29 19:37:57 -0800458 opt = xchg((__force struct ipv6_txoptions **)&np->opt, NULL);
459 if (opt) {
460 atomic_sub(opt->tot_len, &sk->sk_omem_alloc);
461 txopt_put(opt);
462 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463}
Arnaldo Carvalho de Melo3cf3dc62005-12-13 23:23:20 -0800464EXPORT_SYMBOL_GPL(inet6_destroy_sock);
465
Linus Torvalds1da177e2005-04-16 15:20:36 -0700466/*
467 * This does both peername and sockname.
468 */
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900469
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
471 int *uaddr_len, int peer)
472{
Eldad Zack647c0c72012-05-05 10:13:53 +0000473 struct sockaddr_in6 *sin = (struct sockaddr_in6 *)uaddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474 struct sock *sk = sock->sk;
475 struct inet_sock *inet = inet_sk(sk);
476 struct ipv6_pinfo *np = inet6_sk(sk);
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900477
Linus Torvalds1da177e2005-04-16 15:20:36 -0700478 sin->sin6_family = AF_INET6;
479 sin->sin6_flowinfo = 0;
480 sin->sin6_scope_id = 0;
481 if (peer) {
Eric Dumazetc720c7e82009-10-15 06:30:45 +0000482 if (!inet->inet_dport)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483 return -ENOTCONN;
484 if (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) &&
485 peer == 1)
486 return -ENOTCONN;
Eric Dumazetc720c7e82009-10-15 06:30:45 +0000487 sin->sin6_port = inet->inet_dport;
Eric Dumazetefe42082013-10-03 15:42:29 -0700488 sin->sin6_addr = sk->sk_v6_daddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489 if (np->sndflow)
490 sin->sin6_flowinfo = np->flow_label;
491 } else {
Eric Dumazetefe42082013-10-03 15:42:29 -0700492 if (ipv6_addr_any(&sk->sk_v6_rcv_saddr))
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +0000493 sin->sin6_addr = np->saddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494 else
Eric Dumazetefe42082013-10-03 15:42:29 -0700495 sin->sin6_addr = sk->sk_v6_rcv_saddr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496
Eric Dumazetc720c7e82009-10-15 06:30:45 +0000497 sin->sin6_port = inet->inet_sport;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498 }
Hannes Frederic Sowa842df072013-03-08 02:07:19 +0000499 sin->sin6_scope_id = ipv6_iface_scope_id(&sin->sin6_addr,
500 sk->sk_bound_dev_if);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501 *uaddr_len = sizeof(*sin);
Eric Dumazeta02cec22010-09-22 20:43:57 +0000502 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503}
YOSHIFUJI Hideaki71590392007-02-22 22:05:40 +0900504EXPORT_SYMBOL(inet6_getname);
505
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
507{
508 struct sock *sk = sock->sk;
YOSHIFUJI Hideaki3b1e0a62008-03-26 02:26:21 +0900509 struct net *net = sock_net(sk);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510
Eldad Zack647c0c72012-05-05 10:13:53 +0000511 switch (cmd) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512 case SIOCGSTAMP:
513 return sock_get_timestamp(sk, (struct timeval __user *)arg);
514
Eric Dumazetae40eb12007-03-18 17:33:16 -0700515 case SIOCGSTAMPNS:
516 return sock_get_timestampns(sk, (struct timespec __user *)arg);
517
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518 case SIOCADDRT:
519 case SIOCDELRT:
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900520
Eric Dumazeta02cec22010-09-22 20:43:57 +0000521 return ipv6_route_ioctl(net, cmd, (void __user *)arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700522
523 case SIOCSIFADDR:
Daniel Lezcanoaf284932008-03-05 10:46:57 -0800524 return addrconf_add_ifaddr(net, (void __user *) arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525 case SIOCDIFADDR:
Daniel Lezcanoaf284932008-03-05 10:46:57 -0800526 return addrconf_del_ifaddr(net, (void __user *) arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700527 case SIOCSIFDSTADDR:
Daniel Lezcanoaf284932008-03-05 10:46:57 -0800528 return addrconf_set_dstaddr(net, (void __user *) arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529 default:
Christoph Hellwigb5e5fa52006-01-03 14:18:33 -0800530 if (!sk->sk_prot->ioctl)
531 return -ENOIOCTLCMD;
532 return sk->sk_prot->ioctl(sk, cmd, arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533 }
534 /*NOTREACHED*/
Eric Dumazeta02cec22010-09-22 20:43:57 +0000535 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536}
YOSHIFUJI Hideaki71590392007-02-22 22:05:40 +0900537EXPORT_SYMBOL(inet6_ioctl);
538
Eric Dumazet90ddc4f2005-12-22 12:49:22 -0800539const struct proto_ops inet6_stream_ops = {
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800540 .family = PF_INET6,
541 .owner = THIS_MODULE,
542 .release = inet6_release,
543 .bind = inet6_bind,
544 .connect = inet_stream_connect, /* ok */
545 .socketpair = sock_no_socketpair, /* a do nothing */
546 .accept = inet_accept, /* ok */
547 .getname = inet6_getname,
548 .poll = tcp_poll, /* ok */
549 .ioctl = inet6_ioctl, /* must change */
550 .listen = inet_listen, /* ok */
551 .shutdown = inet_shutdown, /* ok */
552 .setsockopt = sock_common_setsockopt, /* ok */
553 .getsockopt = sock_common_getsockopt, /* ok */
Changli Gao7ba42912010-07-10 20:41:55 +0000554 .sendmsg = inet_sendmsg, /* ok */
555 .recvmsg = inet_recvmsg, /* ok */
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800556 .mmap = sock_no_mmap,
Changli Gao7ba42912010-07-10 20:41:55 +0000557 .sendpage = inet_sendpage,
John Fastabend45f91bd2017-08-15 22:31:10 -0700558 .sendmsg_locked = tcp_sendmsg_locked,
559 .sendpage_locked = tcp_sendpage_locked,
Jens Axboea0974dd2007-11-06 23:31:58 -0800560 .splice_read = tcp_splice_read,
Tom Herbert32035582016-08-28 14:43:18 -0700561 .read_sock = tcp_read_sock,
562 .peek_len = tcp_peek_len,
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800563#ifdef CONFIG_COMPAT
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800564 .compat_setsockopt = compat_sock_common_setsockopt,
565 .compat_getsockopt = compat_sock_common_getsockopt,
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800566#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700567};
568
Eric Dumazet90ddc4f2005-12-22 12:49:22 -0800569const struct proto_ops inet6_dgram_ops = {
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800570 .family = PF_INET6,
571 .owner = THIS_MODULE,
572 .release = inet6_release,
573 .bind = inet6_bind,
574 .connect = inet_dgram_connect, /* ok */
575 .socketpair = sock_no_socketpair, /* a do nothing */
576 .accept = sock_no_accept, /* a do nothing */
577 .getname = inet6_getname,
578 .poll = udp_poll, /* ok */
579 .ioctl = inet6_ioctl, /* must change */
580 .listen = sock_no_listen, /* ok */
581 .shutdown = inet_shutdown, /* ok */
582 .setsockopt = sock_common_setsockopt, /* ok */
583 .getsockopt = sock_common_getsockopt, /* ok */
584 .sendmsg = inet_sendmsg, /* ok */
Changli Gao7ba42912010-07-10 20:41:55 +0000585 .recvmsg = inet_recvmsg, /* ok */
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800586 .mmap = sock_no_mmap,
587 .sendpage = sock_no_sendpage,
samanthakumar627d2d62016-04-05 12:41:16 -0400588 .set_peek_off = sk_set_peek_off,
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800589#ifdef CONFIG_COMPAT
Arnaldo Carvalho de Melo543d9cf2006-03-20 22:48:35 -0800590 .compat_setsockopt = compat_sock_common_setsockopt,
591 .compat_getsockopt = compat_sock_common_getsockopt,
Dmitry Mishin3fdadf72006-03-20 22:45:21 -0800592#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593};
594
Stephen Hemmingerec1b4cf2009-10-05 05:58:39 +0000595static const struct net_proto_family inet6_family_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596 .family = PF_INET6,
597 .create = inet6_create,
598 .owner = THIS_MODULE,
599};
600
Daniel Lezcano87c3efb2007-12-11 02:25:01 -0800601int inet6_register_protosw(struct inet_protosw *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602{
603 struct list_head *lh;
604 struct inet_protosw *answer;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605 struct list_head *last_perm;
Daniel Lezcano87c3efb2007-12-11 02:25:01 -0800606 int protocol = p->protocol;
607 int ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608
609 spin_lock_bh(&inetsw6_lock);
610
Daniel Lezcano87c3efb2007-12-11 02:25:01 -0800611 ret = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700612 if (p->type >= SOCK_MAX)
613 goto out_illegal;
614
615 /* If we are trying to override a permanent protocol, bail. */
616 answer = NULL;
Daniel Lezcano87c3efb2007-12-11 02:25:01 -0800617 ret = -EPERM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700618 last_perm = &inetsw6[p->type];
619 list_for_each(lh, &inetsw6[p->type]) {
620 answer = list_entry(lh, struct inet_protosw, list);
621
622 /* Check only the non-wild match. */
623 if (INET_PROTOSW_PERMANENT & answer->flags) {
624 if (protocol == answer->protocol)
625 break;
626 last_perm = lh;
627 }
628
629 answer = NULL;
630 }
631 if (answer)
632 goto out_permanent;
633
634 /* Add the new entry after the last permanent entry if any, so that
635 * the new entry does not override a permanent entry when matched with
636 * a wild-card protocol. But it is allowed to override any existing
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900637 * non-permanent entry. This means that when we remove this entry, the
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638 * system automatically returns to the old behavior.
639 */
640 list_add_rcu(&p->list, last_perm);
Daniel Lezcano87c3efb2007-12-11 02:25:01 -0800641 ret = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700642out:
643 spin_unlock_bh(&inetsw6_lock);
Daniel Lezcano87c3efb2007-12-11 02:25:01 -0800644 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645
646out_permanent:
Joe Perchesf3213832012-05-15 14:11:53 +0000647 pr_err("Attempt to override permanent protocol %d\n", protocol);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700648 goto out;
649
650out_illegal:
Joe Perchesf3213832012-05-15 14:11:53 +0000651 pr_err("Ignoring attempt to register invalid socket type %d\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700652 p->type);
653 goto out;
654}
YOSHIFUJI Hideaki71590392007-02-22 22:05:40 +0900655EXPORT_SYMBOL(inet6_register_protosw);
656
Linus Torvalds1da177e2005-04-16 15:20:36 -0700657void
658inet6_unregister_protosw(struct inet_protosw *p)
659{
660 if (INET_PROTOSW_PERMANENT & p->flags) {
Joe Perchesf3213832012-05-15 14:11:53 +0000661 pr_err("Attempt to unregister permanent protocol %d\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662 p->protocol);
663 } else {
664 spin_lock_bh(&inetsw6_lock);
665 list_del_rcu(&p->list);
666 spin_unlock_bh(&inetsw6_lock);
667
668 synchronize_net();
669 }
670}
YOSHIFUJI Hideaki71590392007-02-22 22:05:40 +0900671EXPORT_SYMBOL(inet6_unregister_protosw);
672
Arnaldo Carvalho de Melob9750ce2005-12-13 23:22:54 -0800673int inet6_sk_rebuild_header(struct sock *sk)
674{
Arnaldo Carvalho de Melob9750ce2005-12-13 23:22:54 -0800675 struct ipv6_pinfo *np = inet6_sk(sk);
David S. Miller68d0c6d2011-03-01 13:19:07 -0800676 struct dst_entry *dst;
Arnaldo Carvalho de Melob9750ce2005-12-13 23:22:54 -0800677
678 dst = __sk_dst_check(sk, np->dst_cookie);
679
Ian Morris63159f22015-03-29 14:00:04 +0100680 if (!dst) {
Arnaldo Carvalho de Melob9750ce2005-12-13 23:22:54 -0800681 struct inet_sock *inet = inet_sk(sk);
Arnaud Ebalard20c59de2010-06-01 21:35:01 +0000682 struct in6_addr *final_p, final;
David S. Miller4c9483b2011-03-12 16:22:43 -0500683 struct flowi6 fl6;
Arnaldo Carvalho de Melob9750ce2005-12-13 23:22:54 -0800684
David S. Miller4c9483b2011-03-12 16:22:43 -0500685 memset(&fl6, 0, sizeof(fl6));
686 fl6.flowi6_proto = sk->sk_protocol;
Eric Dumazetefe42082013-10-03 15:42:29 -0700687 fl6.daddr = sk->sk_v6_daddr;
Alexey Dobriyan4e3fd7a2011-11-21 03:39:03 +0000688 fl6.saddr = np->saddr;
David S. Miller4c9483b2011-03-12 16:22:43 -0500689 fl6.flowlabel = np->flow_label;
690 fl6.flowi6_oif = sk->sk_bound_dev_if;
691 fl6.flowi6_mark = sk->sk_mark;
David S. Miller1958b852011-03-12 16:36:19 -0500692 fl6.fl6_dport = inet->inet_dport;
693 fl6.fl6_sport = inet->inet_sport;
Lorenzo Colittie2d118a2016-11-04 02:23:43 +0900694 fl6.flowi6_uid = sk->sk_uid;
David S. Miller4c9483b2011-03-12 16:22:43 -0500695 security_sk_classify_flow(sk, flowi6_to_flowi(&fl6));
Arnaldo Carvalho de Melob9750ce2005-12-13 23:22:54 -0800696
Eric Dumazet45f6fad2015-11-29 19:37:57 -0800697 rcu_read_lock();
698 final_p = fl6_update_dst(&fl6, rcu_dereference(np->opt),
699 &final);
700 rcu_read_unlock();
Arnaldo Carvalho de Melob9750ce2005-12-13 23:22:54 -0800701
Steffen Klassert0e0d44a2013-08-28 08:04:14 +0200702 dst = ip6_dst_lookup_flow(sk, &fl6, final_p);
David S. Miller68d0c6d2011-03-01 13:19:07 -0800703 if (IS_ERR(dst)) {
Arnaldo Carvalho de Melob9750ce2005-12-13 23:22:54 -0800704 sk->sk_route_caps = 0;
David S. Miller68d0c6d2011-03-01 13:19:07 -0800705 sk->sk_err_soft = -PTR_ERR(dst);
706 return PTR_ERR(dst);
Arnaldo Carvalho de Melob9750ce2005-12-13 23:22:54 -0800707 }
708
Eric Dumazet6bd4f352015-12-02 21:53:57 -0800709 ip6_dst_store(sk, dst, NULL, NULL);
Arnaldo Carvalho de Melob9750ce2005-12-13 23:22:54 -0800710 }
711
712 return 0;
713}
Arnaldo Carvalho de Melob9750ce2005-12-13 23:22:54 -0800714EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header);
715
Eric Dumazeta2247722014-09-27 09:50:56 -0700716bool ipv6_opt_accepted(const struct sock *sk, const struct sk_buff *skb,
717 const struct inet6_skb_parm *opt)
Arnaldo Carvalho de Melo399c07d2005-12-13 23:24:28 -0800718{
Eric Dumazet92113bf2012-05-18 08:14:11 +0200719 const struct ipv6_pinfo *np = inet6_sk(sk);
Arnaldo Carvalho de Melo399c07d2005-12-13 23:24:28 -0800720
721 if (np->rxopt.all) {
Florian Westphal8b58a392015-07-08 23:32:12 +0200722 if (((opt->flags & IP6SKB_HOPBYHOP) &&
723 (np->rxopt.bits.hopopts || np->rxopt.bits.ohopopts)) ||
Florent Fourcotac1eabc2013-12-08 15:47:01 +0100724 (ip6_flowinfo((struct ipv6hdr *) skb_network_header(skb)) &&
Arnaldo Carvalho de Melo399c07d2005-12-13 23:24:28 -0800725 np->rxopt.bits.rxflow) ||
726 (opt->srcrt && (np->rxopt.bits.srcrt ||
727 np->rxopt.bits.osrcrt)) ||
728 ((opt->dst1 || opt->dst0) &&
729 (np->rxopt.bits.dstopts || np->rxopt.bits.odstopts)))
Eric Dumazet92113bf2012-05-18 08:14:11 +0200730 return true;
Arnaldo Carvalho de Melo399c07d2005-12-13 23:24:28 -0800731 }
Eric Dumazet92113bf2012-05-18 08:14:11 +0200732 return false;
Arnaldo Carvalho de Melo399c07d2005-12-13 23:24:28 -0800733}
Arnaldo Carvalho de Melo399c07d2005-12-13 23:24:28 -0800734EXPORT_SYMBOL_GPL(ipv6_opt_accepted);
735
Stephen Hemminger7546dd92009-03-09 08:18:29 +0000736static struct packet_type ipv6_packet_type __read_mostly = {
Harvey Harrison09640e632009-02-01 00:45:17 -0800737 .type = cpu_to_be16(ETH_P_IPV6),
YOSHIFUJI Hideaki662397f2008-02-27 23:14:03 +0900738 .func = ipv6_rcv,
Vlad Yasevich22061d82012-11-15 08:49:11 +0000739};
740
YOSHIFUJI Hideaki662397f2008-02-27 23:14:03 +0900741static int __init ipv6_packet_init(void)
742{
743 dev_add_pack(&ipv6_packet_type);
744 return 0;
745}
746
747static void ipv6_packet_cleanup(void)
748{
749 dev_remove_pack(&ipv6_packet_type);
750}
751
Denis V. Luneve43291c2008-10-07 14:48:53 -0700752static int __net_init ipv6_init_mibs(struct net *net)
753{
John Stultz827da442013-10-07 15:51:58 -0700754 int i;
755
WANG Cong698365f2014-05-05 15:55:55 -0700756 net->mib.udp_stats_in6 = alloc_percpu(struct udp_mib);
757 if (!net->mib.udp_stats_in6)
Denis V. Lunev0c7ed672008-10-07 14:49:36 -0700758 return -ENOMEM;
WANG Cong698365f2014-05-05 15:55:55 -0700759 net->mib.udplite_stats_in6 = alloc_percpu(struct udp_mib);
760 if (!net->mib.udplite_stats_in6)
Denis V. Lunevbe713a42008-10-07 14:50:06 -0700761 goto err_udplite_mib;
WANG Cong698365f2014-05-05 15:55:55 -0700762 net->mib.ipv6_statistics = alloc_percpu(struct ipstats_mib);
763 if (!net->mib.ipv6_statistics)
Denis V. Lunev9261e532008-10-08 10:36:03 -0700764 goto err_ip_mib;
John Stultz827da442013-10-07 15:51:58 -0700765
766 for_each_possible_cpu(i) {
767 struct ipstats_mib *af_inet6_stats;
WANG Cong698365f2014-05-05 15:55:55 -0700768 af_inet6_stats = per_cpu_ptr(net->mib.ipv6_statistics, i);
John Stultz827da442013-10-07 15:51:58 -0700769 u64_stats_init(&af_inet6_stats->syncp);
John Stultz827da442013-10-07 15:51:58 -0700770 }
771
772
WANG Cong698365f2014-05-05 15:55:55 -0700773 net->mib.icmpv6_statistics = alloc_percpu(struct icmpv6_mib);
774 if (!net->mib.icmpv6_statistics)
Denis V. Lunev9261e532008-10-08 10:36:03 -0700775 goto err_icmp_mib;
Eric Dumazet2a244442011-11-13 01:24:04 +0000776 net->mib.icmpv6msg_statistics = kzalloc(sizeof(struct icmpv6msg_mib),
777 GFP_KERNEL);
778 if (!net->mib.icmpv6msg_statistics)
Denis V. Lunev9261e532008-10-08 10:36:03 -0700779 goto err_icmpmsg_mib;
Denis V. Luneve43291c2008-10-07 14:48:53 -0700780 return 0;
Denis V. Lunevbe713a42008-10-07 14:50:06 -0700781
Denis V. Lunev9261e532008-10-08 10:36:03 -0700782err_icmpmsg_mib:
WANG Cong698365f2014-05-05 15:55:55 -0700783 free_percpu(net->mib.icmpv6_statistics);
Denis V. Lunev9261e532008-10-08 10:36:03 -0700784err_icmp_mib:
WANG Cong698365f2014-05-05 15:55:55 -0700785 free_percpu(net->mib.ipv6_statistics);
Denis V. Lunev9261e532008-10-08 10:36:03 -0700786err_ip_mib:
WANG Cong698365f2014-05-05 15:55:55 -0700787 free_percpu(net->mib.udplite_stats_in6);
Denis V. Lunevbe713a42008-10-07 14:50:06 -0700788err_udplite_mib:
WANG Cong698365f2014-05-05 15:55:55 -0700789 free_percpu(net->mib.udp_stats_in6);
Denis V. Lunevbe713a42008-10-07 14:50:06 -0700790 return -ENOMEM;
Denis V. Luneve43291c2008-10-07 14:48:53 -0700791}
792
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +0000793static void ipv6_cleanup_mibs(struct net *net)
Denis V. Luneve43291c2008-10-07 14:48:53 -0700794{
WANG Cong698365f2014-05-05 15:55:55 -0700795 free_percpu(net->mib.udp_stats_in6);
796 free_percpu(net->mib.udplite_stats_in6);
797 free_percpu(net->mib.ipv6_statistics);
798 free_percpu(net->mib.icmpv6_statistics);
Eric Dumazet2a244442011-11-13 01:24:04 +0000799 kfree(net->mib.icmpv6msg_statistics);
Denis V. Luneve43291c2008-10-07 14:48:53 -0700800}
801
Alexey Dobriyane7dc8492008-10-13 18:54:07 -0700802static int __net_init inet6_net_init(struct net *net)
Daniel Lezcano81c1c172008-01-10 02:48:33 -0800803{
Daniel Lezcano0c96d8c2008-03-21 04:14:17 -0700804 int err = 0;
805
Daniel Lezcano99bc9c42008-01-10 02:54:53 -0800806 net->ipv6.sysctl.bindv6only = 0;
Daniel Lezcano41a76902008-01-10 03:02:40 -0800807 net->ipv6.sysctl.icmpv6_time = 1*HZ;
Florent Fourcot6444f722014-01-17 17:15:05 +0100808 net->ipv6.sysctl.flowlabel_consistency = 1;
Tom Herbert42240902015-07-31 16:52:12 -0700809 net->ipv6.sysctl.auto_flowlabels = IP6_DEFAULT_AUTO_FLOW_LABELS;
Hannes Frederic Sowa1855b7c2015-03-23 23:36:05 +0100810 net->ipv6.sysctl.idgen_retries = 3;
811 net->ipv6.sysctl.idgen_delay = 1 * HZ;
Tom Herbertbe268492015-07-31 16:52:13 -0700812 net->ipv6.sysctl.flowlabel_state_ranges = 0;
Hannes Frederic Sowa812918c2014-10-06 19:58:37 +0200813 atomic_set(&net->ipv6.fib6_sernum, 1);
Daniel Lezcanoe71e0342008-01-10 02:56:03 -0800814
Denis V. Luneve43291c2008-10-07 14:48:53 -0700815 err = ipv6_init_mibs(net);
816 if (err)
817 return err;
Daniel Lezcano0c96d8c2008-03-21 04:14:17 -0700818#ifdef CONFIG_PROC_FS
819 err = udp6_proc_init(net);
820 if (err)
821 goto out;
Daniel Lezcano6f8b13b2008-03-21 04:14:45 -0700822 err = tcp6_proc_init(net);
823 if (err)
824 goto proc_tcp6_fail;
Daniel Lezcano6ab57e72008-03-26 16:52:32 -0700825 err = ac6_proc_init(net);
826 if (err)
827 goto proc_ac6_fail;
Daniel Lezcano0c96d8c2008-03-21 04:14:17 -0700828#endif
829 return err;
Daniel Lezcano6f8b13b2008-03-21 04:14:45 -0700830
831#ifdef CONFIG_PROC_FS
Daniel Lezcano6ab57e72008-03-26 16:52:32 -0700832proc_ac6_fail:
833 tcp6_proc_exit(net);
Daniel Lezcano6f8b13b2008-03-21 04:14:45 -0700834proc_tcp6_fail:
835 udp6_proc_exit(net);
Denis V. Luneve43291c2008-10-07 14:48:53 -0700836out:
837 ipv6_cleanup_mibs(net);
838 return err;
Daniel Lezcano6f8b13b2008-03-21 04:14:45 -0700839#endif
Daniel Lezcano81c1c172008-01-10 02:48:33 -0800840}
841
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +0000842static void __net_exit inet6_net_exit(struct net *net)
Daniel Lezcano81c1c172008-01-10 02:48:33 -0800843{
Daniel Lezcano0c96d8c2008-03-21 04:14:17 -0700844#ifdef CONFIG_PROC_FS
845 udp6_proc_exit(net);
Daniel Lezcano6f8b13b2008-03-21 04:14:45 -0700846 tcp6_proc_exit(net);
Daniel Lezcano6ab57e72008-03-26 16:52:32 -0700847 ac6_proc_exit(net);
Daniel Lezcano0c96d8c2008-03-21 04:14:17 -0700848#endif
Denis V. Luneve43291c2008-10-07 14:48:53 -0700849 ipv6_cleanup_mibs(net);
Daniel Lezcano81c1c172008-01-10 02:48:33 -0800850}
851
852static struct pernet_operations inet6_net_ops = {
853 .init = inet6_net_init,
854 .exit = inet6_net_exit,
855};
856
Cong Wang5f81bd22013-08-31 13:44:30 +0800857static const struct ipv6_stub ipv6_stub_impl = {
858 .ipv6_sock_mc_join = ipv6_sock_mc_join,
859 .ipv6_sock_mc_drop = ipv6_sock_mc_drop,
860 .ipv6_dst_lookup = ip6_dst_lookup,
861 .udpv6_encap_enable = udpv6_encap_enable,
Cong Wangf564f452013-08-31 13:44:36 +0800862 .ndisc_send_na = ndisc_send_na,
Cong Wange15a00a2013-08-31 13:44:34 +0800863 .nd_tbl = &nd_tbl,
Cong Wang5f81bd22013-08-31 13:44:30 +0800864};
865
Linus Torvalds1da177e2005-04-16 15:20:36 -0700866static int __init inet6_init(void)
867{
YOSHIFUJI Hideaki1ab14572007-02-09 23:24:49 +0900868 struct list_head *r;
Brian Haleyfe7ca2e2009-03-04 03:18:11 -0800869 int err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700870
Eyal Birgerb4772ef2015-03-01 14:58:29 +0200871 sock_skb_cb_check_size(sizeof(struct inet6_skb_parm));
YOSHIFUJI Hideakief047f52006-09-01 00:29:06 -0700872
Brian Haleyfe7ca2e2009-03-04 03:18:11 -0800873 /* Register the socket-side information for inet6_create. */
Eldad Zack647c0c72012-05-05 10:13:53 +0000874 for (r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r)
Brian Haleyfe7ca2e2009-03-04 03:18:11 -0800875 INIT_LIST_HEAD(r);
876
Brian Haley56d417b2009-06-01 03:07:33 -0700877 if (disable_ipv6_mod) {
Joe Perchesf3213832012-05-15 14:11:53 +0000878 pr_info("Loaded, but administratively disabled, reboot required to enable\n");
Brian Haleyfe7ca2e2009-03-04 03:18:11 -0800879 goto out;
880 }
881
Linus Torvalds1da177e2005-04-16 15:20:36 -0700882 err = proto_register(&tcpv6_prot, 1);
883 if (err)
884 goto out;
885
886 err = proto_register(&udpv6_prot, 1);
887 if (err)
888 goto out_unregister_tcp_proto;
889
Gerrit Renkerba4e58e2006-11-27 11:10:57 -0800890 err = proto_register(&udplitev6_prot, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700891 if (err)
892 goto out_unregister_udp_proto;
893
Gerrit Renkerba4e58e2006-11-27 11:10:57 -0800894 err = proto_register(&rawv6_prot, 1);
895 if (err)
896 goto out_unregister_udplite_proto;
897
Lorenzo Colitti6d0bfe22013-05-22 20:17:31 +0000898 err = proto_register(&pingv6_prot, 1);
899 if (err)
900 goto out_unregister_ping_proto;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700901
Linus Torvalds1da177e2005-04-16 15:20:36 -0700902 /* We MUST register RAW sockets before we create the ICMP6,
903 * IGMP6, or NDISC control sockets.
904 */
Daniel Lezcano7f4e4862007-12-11 02:25:35 -0800905 err = rawv6_init();
906 if (err)
907 goto out_unregister_raw_proto;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700908
909 /* Register the family here so that the init calls below will
910 * be able to create sockets. (?? is this dangerous ??)
911 */
David S. Miller8eb559102005-11-11 15:05:47 -0800912 err = sock_register(&inet6_family_ops);
913 if (err)
Daniel Lezcano7f4e4862007-12-11 02:25:35 -0800914 goto out_sock_register_fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700915
Linus Torvalds1da177e2005-04-16 15:20:36 -0700916 /*
917 * ipngwg API draft makes clear that the correct semantics
918 * for TCP and UDP is to consider one TCP and UDP instance
Lucas De Marchi25985ed2011-03-30 22:57:33 -0300919 * in a host available by both INET and INET6 APIs and
Linus Torvalds1da177e2005-04-16 15:20:36 -0700920 * able to communicate via both network protocols.
921 */
922
Daniel Lezcano81c1c172008-01-10 02:48:33 -0800923 err = register_pernet_subsys(&inet6_net_ops);
924 if (err)
925 goto register_pernet_fail;
Wang Chen623d1a12008-07-03 12:13:30 +0800926 err = ip6_mr_init();
927 if (err)
928 goto ipmr_fail;
WANG Cong15e66802017-03-05 12:34:53 -0800929 err = icmpv6_init();
930 if (err)
931 goto icmp_fail;
Denis V. Lunev9b0f9762008-02-29 11:13:15 -0800932 err = ndisc_init();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700933 if (err)
934 goto ndisc_fail;
Denis V. Lunev9b0f9762008-02-29 11:13:15 -0800935 err = igmp6_init();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700936 if (err)
937 goto igmp_fail;
Cong Wang5f81bd22013-08-31 13:44:30 +0800938
Harald Welte2cc7d572005-08-09 19:42:34 -0700939 err = ipv6_netfilter_init();
940 if (err)
941 goto netfilter_fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700942 /* Create /proc/foo6 entries. */
943#ifdef CONFIG_PROC_FS
944 err = -ENOMEM;
945 if (raw6_proc_init())
946 goto proc_raw6_fail;
Gerrit Renkerba4e58e2006-11-27 11:10:57 -0800947 if (udplite6_proc_init())
948 goto proc_udplite6_fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700949 if (ipv6_misc_proc_init())
950 goto proc_misc6_fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700951 if (if6_proc_init())
952 goto proc_if6_fail;
953#endif
Daniel Lezcanoe2fddf52007-12-07 00:44:29 -0800954 err = ip6_route_init();
955 if (err)
956 goto ip6_route_fail;
Michal Kubeček2c861cc2013-09-09 21:45:04 +0200957 err = ndisc_late_init();
958 if (err)
959 goto ndisc_late_fail;
Daniel Lezcano0a3e78a2007-12-11 02:23:18 -0800960 err = ip6_flowlabel_init();
961 if (err)
962 goto ip6_flowlabel_fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700963 err = addrconf_init();
964 if (err)
965 goto addrconf_fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700966
967 /* Init v6 extension headers. */
Daniel Lezcano248b2382007-12-11 02:23:54 -0800968 err = ipv6_exthdrs_init();
969 if (err)
970 goto ipv6_exthdrs_fail;
971
Daniel Lezcano853cbba2007-12-11 02:24:29 -0800972 err = ipv6_frag_init();
973 if (err)
974 goto ipv6_frag_fail;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700975
976 /* Init v6 transport protocols. */
Daniel Lezcano7f4e4862007-12-11 02:25:35 -0800977 err = udpv6_init();
978 if (err)
979 goto udpv6_fail;
Herbert Xue2ed4052005-07-05 14:41:20 -0700980
Daniel Lezcano7f4e4862007-12-11 02:25:35 -0800981 err = udplitev6_init();
982 if (err)
983 goto udplitev6_fail;
984
Tom Herberta6024562016-04-05 08:22:51 -0700985 err = udpv6_offload_init();
986 if (err)
987 goto udpv6_offload_fail;
988
Daniel Lezcano7f4e4862007-12-11 02:25:35 -0800989 err = tcpv6_init();
990 if (err)
991 goto tcpv6_fail;
992
993 err = ipv6_packet_init();
994 if (err)
995 goto ipv6_packet_fail;
Benjamin Thery94911fe2008-03-05 10:45:36 -0800996
Lorenzo Colitti6d0bfe22013-05-22 20:17:31 +0000997 err = pingv6_init();
998 if (err)
999 goto pingv6_fail;
1000
Huw Daviescb72d382016-06-27 15:02:46 -04001001 err = calipso_init();
1002 if (err)
1003 goto calipso_fail;
1004
David Lebrun915d7e52016-11-08 14:57:40 +01001005 err = seg6_init();
1006 if (err)
1007 goto seg6_fail;
1008
Vlad Yasevich382ed722017-03-28 14:49:16 -04001009 err = igmp6_late_init();
1010 if (err)
1011 goto igmp6_late_err;
1012
Benjamin Thery94911fe2008-03-05 10:45:36 -08001013#ifdef CONFIG_SYSCTL
1014 err = ipv6_sysctl_register();
1015 if (err)
1016 goto sysctl_fail;
1017#endif
Paolo Abenib7d6df52017-04-24 14:18:28 +02001018
1019 /* ensure that ipv6 stubs are visible only after ipv6 is ready */
1020 wmb();
1021 ipv6_stub = &ipv6_stub_impl;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001022out:
1023 return err;
1024
Benjamin Thery94911fe2008-03-05 10:45:36 -08001025#ifdef CONFIG_SYSCTL
1026sysctl_fail:
Vlad Yasevich382ed722017-03-28 14:49:16 -04001027 igmp6_late_cleanup();
Benjamin Thery94911fe2008-03-05 10:45:36 -08001028#endif
Vlad Yasevich382ed722017-03-28 14:49:16 -04001029igmp6_late_err:
1030 seg6_exit();
David Lebrun915d7e52016-11-08 14:57:40 +01001031seg6_fail:
1032 calipso_exit();
Huw Daviescb72d382016-06-27 15:02:46 -04001033calipso_fail:
1034 pingv6_exit();
Lorenzo Colitti6d0bfe22013-05-22 20:17:31 +00001035pingv6_fail:
Vlad Yasevicheca42aa2013-11-16 15:17:24 -05001036 ipv6_packet_cleanup();
Daniel Lezcano7f4e4862007-12-11 02:25:35 -08001037ipv6_packet_fail:
1038 tcpv6_exit();
1039tcpv6_fail:
Tom Herberta6024562016-04-05 08:22:51 -07001040 udpv6_offload_exit();
1041udpv6_offload_fail:
Daniel Lezcano7f4e4862007-12-11 02:25:35 -08001042 udplitev6_exit();
1043udplitev6_fail:
1044 udpv6_exit();
1045udpv6_fail:
1046 ipv6_frag_exit();
Daniel Lezcano853cbba2007-12-11 02:24:29 -08001047ipv6_frag_fail:
1048 ipv6_exthdrs_exit();
Daniel Lezcano248b2382007-12-11 02:23:54 -08001049ipv6_exthdrs_fail:
1050 addrconf_cleanup();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001051addrconf_fail:
1052 ip6_flowlabel_cleanup();
Daniel Lezcano0a3e78a2007-12-11 02:23:18 -08001053ip6_flowlabel_fail:
Michal Kubeček2c861cc2013-09-09 21:45:04 +02001054 ndisc_late_cleanup();
1055ndisc_late_fail:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001056 ip6_route_cleanup();
Daniel Lezcanoe2fddf52007-12-07 00:44:29 -08001057ip6_route_fail:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001058#ifdef CONFIG_PROC_FS
1059 if6_proc_exit();
1060proc_if6_fail:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001061 ipv6_misc_proc_exit();
1062proc_misc6_fail:
Gerrit Renkerba4e58e2006-11-27 11:10:57 -08001063 udplite6_proc_exit();
1064proc_udplite6_fail:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001065 raw6_proc_exit();
1066proc_raw6_fail:
1067#endif
Harald Welte2cc7d572005-08-09 19:42:34 -07001068 ipv6_netfilter_fini();
1069netfilter_fail:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001070 igmp6_cleanup();
1071igmp_fail:
1072 ndisc_cleanup();
1073ndisc_fail:
Wang Chen623d1a12008-07-03 12:13:30 +08001074 ip6_mr_cleanup();
Linus Torvalds1da177e2005-04-16 15:20:36 -07001075icmp_fail:
Daniel Lezcano81c1c172008-01-10 02:48:33 -08001076 unregister_pernet_subsys(&inet6_net_ops);
WANG Cong15e66802017-03-05 12:34:53 -08001077ipmr_fail:
1078 icmpv6_cleanup();
Daniel Lezcano81c1c172008-01-10 02:48:33 -08001079register_pernet_fail:
David S. Miller8eb559102005-11-11 15:05:47 -08001080 sock_unregister(PF_INET6);
Daniel Lezcanoe2fddf52007-12-07 00:44:29 -08001081 rtnl_unregister_all(PF_INET6);
Daniel Lezcano7f4e4862007-12-11 02:25:35 -08001082out_sock_register_fail:
1083 rawv6_exit();
Lorenzo Colitti6d0bfe22013-05-22 20:17:31 +00001084out_unregister_ping_proto:
1085 proto_unregister(&pingv6_prot);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001086out_unregister_raw_proto:
1087 proto_unregister(&rawv6_prot);
Gerrit Renkerba4e58e2006-11-27 11:10:57 -08001088out_unregister_udplite_proto:
1089 proto_unregister(&udplitev6_prot);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001090out_unregister_udp_proto:
1091 proto_unregister(&udpv6_prot);
1092out_unregister_tcp_proto:
1093 proto_unregister(&tcpv6_prot);
1094 goto out;
1095}
1096module_init(inet6_init);
1097
Linus Torvalds1da177e2005-04-16 15:20:36 -07001098MODULE_ALIAS_NETPROTO(PF_INET6);