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1/*
2 * PF_INET6 socket protocol family
3 * Linux INET6 implementation
4 *
5 * Authors:
6 * Pedro Roque <roque@di.fc.ul.pt>
7 *
8 * Adapted from linux/net/ipv4/af_inet.c
9 *
10 * Fixes:
11 * piggy, Karl Knutson : Socket protocol table
12 * Hideaki YOSHIFUJI : sin6_scope_id support
13 * Arnaldo Melo : check proc_net_create return, cleanups
14 *
15 * This program is free software; you can redistribute it and/or
16 * modify it under the terms of the GNU General Public License
17 * as published by the Free Software Foundation; either version
18 * 2 of the License, or (at your option) any later version.
19 */
20
21#define pr_fmt(fmt) "IPv6: " fmt
22
23#include <linux/module.h>
24#include <linux/capability.h>
25#include <linux/errno.h>
26#include <linux/types.h>
27#include <linux/socket.h>
28#include <linux/in.h>
29#include <linux/kernel.h>
30#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>
40#include <linux/slab.h>
41
42#include <linux/inet.h>
43#include <linux/netdevice.h>
44#include <linux/icmpv6.h>
45#include <linux/netfilter_ipv6.h>
46
47#include <net/ip.h>
48#include <net/ipv6.h>
49#include <net/udp.h>
50#include <net/udplite.h>
51#include <net/tcp.h>
52#include <net/ping.h>
53#include <net/protocol.h>
54#include <net/inet_common.h>
55#include <net/route.h>
56#include <net/transp_v6.h>
57#include <net/ip6_route.h>
58#include <net/addrconf.h>
59#include <net/ndisc.h>
60#ifdef CONFIG_IPV6_TUNNEL
61#include <net/ip6_tunnel.h>
62#endif
63
64#include <asm/uaccess.h>
65#include <linux/mroute6.h>
66
67MODULE_AUTHOR("Cast of dozens");
68MODULE_DESCRIPTION("IPv6 protocol stack for Linux");
69MODULE_LICENSE("GPL");
70
71/* The inetsw6 table contains everything that inet6_create needs to
72 * build a new socket.
73 */
74static struct list_head inetsw6[SOCK_MAX];
75static DEFINE_SPINLOCK(inetsw6_lock);
76
77struct ipv6_params ipv6_defaults = {
78 .disable_ipv6 = 0,
79 .autoconf = 1,
80};
81
82static int disable_ipv6_mod;
83
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");
92
93static __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
100static int inet6_create(struct net *net, struct socket *sock, int protocol,
101 int kern)
102{
103 struct inet_sock *inet;
104 struct ipv6_pinfo *np;
105 struct sock *sk;
106 struct inet_protosw *answer;
107 struct proto *answer_prot;
108 unsigned char answer_flags;
109 int try_loading_module = 0;
110 int err;
111
112 if (protocol < 0 || protocol >= IPPROTO_MAX)
113 return -EINVAL;
114
115 /* Look for the requested type/protocol pair. */
116lookup_protocol:
117 err = -ESOCKTNOSUPPORT;
118 rcu_read_lock();
119 list_for_each_entry_rcu(answer, &inetsw6[sock->type], list) {
120
121 err = 0;
122 /* Check the non-wild match. */
123 if (protocol == answer->protocol) {
124 if (protocol != IPPROTO_IP)
125 break;
126 } else {
127 /* Check for the two wild cases. */
128 if (IPPROTO_IP == protocol) {
129 protocol = answer->protocol;
130 break;
131 }
132 if (IPPROTO_IP == answer->protocol)
133 break;
134 }
135 err = -EPROTONOSUPPORT;
136 }
137
138 if (err) {
139 if (try_loading_module < 2) {
140 rcu_read_unlock();
141 /*
142 * Be more specific, e.g. net-pf-10-proto-132-type-1
143 * (net-pf-PF_INET6-proto-IPPROTO_SCTP-type-SOCK_STREAM)
144 */
145 if (++try_loading_module == 1)
146 request_module("net-pf-%d-proto-%d-type-%d",
147 PF_INET6, protocol, sock->type);
148 /*
149 * Fall back to generic, e.g. net-pf-10-proto-132
150 * (net-pf-PF_INET6-proto-IPPROTO_SCTP)
151 */
152 else
153 request_module("net-pf-%d-proto-%d",
154 PF_INET6, protocol);
155 goto lookup_protocol;
156 } else
157 goto out_rcu_unlock;
158 }
159
160 err = -EPERM;
161 if (sock->type == SOCK_RAW && !kern &&
162 !ns_capable(net->user_ns, CAP_NET_RAW))
163 goto out_rcu_unlock;
164
165 sock->ops = answer->ops;
166 answer_prot = answer->prot;
167 answer_flags = answer->flags;
168 rcu_read_unlock();
169
170 WARN_ON(!answer_prot->slab);
171
172 err = -ENOBUFS;
173 sk = sk_alloc(net, PF_INET6, GFP_KERNEL, answer_prot, kern);
174 if (!sk)
175 goto out;
176
177 sock_init_data(sock, sk);
178
179 err = 0;
180 if (INET_PROTOSW_REUSE & answer_flags)
181 sk->sk_reuse = SK_CAN_REUSE;
182
183 inet = inet_sk(sk);
184 inet->is_icsk = (INET_PROTOSW_ICSK & answer_flags) != 0;
185
186 if (SOCK_RAW == sock->type) {
187 inet->inet_num = protocol;
188 if (IPPROTO_RAW == protocol)
189 inet->hdrincl = 1;
190 }
191
192 sk->sk_destruct = inet_sock_destruct;
193 sk->sk_family = PF_INET6;
194 sk->sk_protocol = protocol;
195
196 sk->sk_backlog_rcv = answer->prot->backlog_rcv;
197
198 inet_sk(sk)->pinet6 = np = inet6_sk_generic(sk);
199 np->hop_limit = -1;
200 np->mcast_hops = IPV6_DEFAULT_MCASTHOPS;
201 np->mc_loop = 1;
202 np->pmtudisc = IPV6_PMTUDISC_WANT;
203 np->autoflowlabel = ip6_default_np_autolabel(sock_net(sk));
204 sk->sk_ipv6only = net->ipv6.sysctl.bindv6only;
205
206 /* Init the ipv4 part of the socket since we can have sockets
207 * using v6 API for ipv4.
208 */
209 inet->uc_ttl = -1;
210
211 inet->mc_loop = 1;
212 inet->mc_ttl = 1;
213 inet->mc_index = 0;
214 inet->mc_list = NULL;
215 inet->rcv_tos = 0;
216
217 if (net->ipv4.sysctl_ip_no_pmtu_disc)
218 inet->pmtudisc = IP_PMTUDISC_DONT;
219 else
220 inet->pmtudisc = IP_PMTUDISC_WANT;
221 /*
222 * Increment only the relevant sk_prot->socks debug field, this changes
223 * the previous behaviour of incrementing both the equivalent to
224 * answer->prot->socks (inet6_sock_nr) and inet_sock_nr.
225 *
226 * This allows better debug granularity as we'll know exactly how many
227 * UDPv6, TCPv6, etc socks were allocated, not the sum of all IPv6
228 * transport protocol socks. -acme
229 */
230 sk_refcnt_debug_inc(sk);
231
232 if (inet->inet_num) {
233 /* It assumes that any protocol which allows
234 * the user to assign a number at socket
235 * creation time automatically shares.
236 */
237 inet->inet_sport = htons(inet->inet_num);
238 err = sk->sk_prot->hash(sk);
239 if (err) {
240 sk_common_release(sk);
241 goto out;
242 }
243 }
244 if (sk->sk_prot->init) {
245 err = sk->sk_prot->init(sk);
246 if (err) {
247 sk_common_release(sk);
248 goto out;
249 }
250 }
251out:
252 return err;
253out_rcu_unlock:
254 rcu_read_unlock();
255 goto out;
256}
257
258
259/* bind for INET6 API */
260int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
261{
262 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)uaddr;
263 struct sock *sk = sock->sk;
264 struct inet_sock *inet = inet_sk(sk);
265 struct ipv6_pinfo *np = inet6_sk(sk);
266 struct net *net = sock_net(sk);
267 __be32 v4addr = 0;
268 unsigned short snum;
269 int addr_type = 0;
270 int err = 0;
271
272 /* If the socket has its own bind function then use it. */
273 if (sk->sk_prot->bind)
274 return sk->sk_prot->bind(sk, uaddr, addr_len);
275
276 if (addr_len < SIN6_LEN_RFC2133)
277 return -EINVAL;
278
279 if (addr->sin6_family != AF_INET6)
280 return -EAFNOSUPPORT;
281
282 addr_type = ipv6_addr_type(&addr->sin6_addr);
283 if ((addr_type & IPV6_ADDR_MULTICAST) && sock->type == SOCK_STREAM)
284 return -EINVAL;
285
286 snum = ntohs(addr->sin6_port);
287 if (snum && snum < PROT_SOCK && !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE))
288 return -EACCES;
289
290 lock_sock(sk);
291
292 /* Check these errors (active socket, double bind). */
293 if (sk->sk_state != TCP_CLOSE || inet->inet_num) {
294 err = -EINVAL;
295 goto out;
296 }
297
298 /* Check if the address belongs to the host. */
299 if (addr_type == IPV6_ADDR_MAPPED) {
300 int chk_addr_ret;
301
302 /* Binding to v4-mapped address on a v6-only socket
303 * makes no sense
304 */
305 if (sk->sk_ipv6only) {
306 err = -EINVAL;
307 goto out;
308 }
309
310 /* Reproduce AF_INET checks to make the bindings consistent */
311 v4addr = addr->sin6_addr.s6_addr32[3];
312 chk_addr_ret = inet_addr_type(net, v4addr);
313 if (!net->ipv4.sysctl_ip_nonlocal_bind &&
314 !(inet->freebind || inet->transparent) &&
315 v4addr != htonl(INADDR_ANY) &&
316 chk_addr_ret != RTN_LOCAL &&
317 chk_addr_ret != RTN_MULTICAST &&
318 chk_addr_ret != RTN_BROADCAST) {
319 err = -EADDRNOTAVAIL;
320 goto out;
321 }
322 } else {
323 if (addr_type != IPV6_ADDR_ANY) {
324 struct net_device *dev = NULL;
325
326 rcu_read_lock();
327 if (__ipv6_addr_needs_scope_id(addr_type)) {
328 if (addr_len >= sizeof(struct sockaddr_in6) &&
329 addr->sin6_scope_id) {
330 /* Override any existing binding, if another one
331 * is supplied by user.
332 */
333 sk->sk_bound_dev_if = addr->sin6_scope_id;
334 }
335
336 /* Binding to link-local address requires an interface */
337 if (!sk->sk_bound_dev_if) {
338 err = -EINVAL;
339 goto out_unlock;
340 }
341 dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if);
342 if (!dev) {
343 err = -ENODEV;
344 goto out_unlock;
345 }
346 }
347
348 /* ipv4 addr of the socket is invalid. Only the
349 * unspecified and mapped address have a v4 equivalent.
350 */
351 v4addr = LOOPBACK4_IPV6;
352 if (!(addr_type & IPV6_ADDR_MULTICAST)) {
353 if (!net->ipv6.sysctl.ip_nonlocal_bind &&
354 !(inet->freebind || inet->transparent) &&
355 !ipv6_chk_addr(net, &addr->sin6_addr,
356 dev, 0)) {
357 err = -EADDRNOTAVAIL;
358 goto out_unlock;
359 }
360 }
361 rcu_read_unlock();
362 }
363 }
364
365 inet->inet_rcv_saddr = v4addr;
366 inet->inet_saddr = v4addr;
367
368 sk->sk_v6_rcv_saddr = addr->sin6_addr;
369
370 if (!(addr_type & IPV6_ADDR_MULTICAST))
371 np->saddr = addr->sin6_addr;
372
373 /* Make sure we are allowed to bind here. */
374 if ((snum || !inet->bind_address_no_port) &&
375 sk->sk_prot->get_port(sk, snum)) {
376 inet_reset_saddr(sk);
377 err = -EADDRINUSE;
378 goto out;
379 }
380
381 if (addr_type != IPV6_ADDR_ANY) {
382 sk->sk_userlocks |= SOCK_BINDADDR_LOCK;
383 if (addr_type != IPV6_ADDR_MAPPED)
384 sk->sk_ipv6only = 1;
385 }
386 if (snum)
387 sk->sk_userlocks |= SOCK_BINDPORT_LOCK;
388 inet->inet_sport = htons(inet->inet_num);
389 inet->inet_dport = 0;
390 inet->inet_daddr = 0;
391out:
392 release_sock(sk);
393 return err;
394out_unlock:
395 rcu_read_unlock();
396 goto out;
397}
398EXPORT_SYMBOL(inet6_bind);
399
400int inet6_release(struct socket *sock)
401{
402 struct sock *sk = sock->sk;
403
404 if (!sk)
405 return -EINVAL;
406
407 /* Free mc lists */
408 ipv6_sock_mc_close(sk);
409
410 /* Free ac lists */
411 ipv6_sock_ac_close(sk);
412
413 return inet_release(sock);
414}
415EXPORT_SYMBOL(inet6_release);
416
417void inet6_destroy_sock(struct sock *sk)
418{
419 struct ipv6_pinfo *np = inet6_sk(sk);
420 struct sk_buff *skb;
421 struct ipv6_txoptions *opt;
422
423 /* Release rx options */
424
425 skb = xchg(&np->pktoptions, NULL);
426 if (skb)
427 kfree_skb(skb);
428
429 skb = xchg(&np->rxpmtu, NULL);
430 if (skb)
431 kfree_skb(skb);
432
433 /* Free flowlabels */
434 fl6_free_socklist(sk);
435
436 /* Free tx options */
437
438 opt = xchg((__force struct ipv6_txoptions **)&np->opt, NULL);
439 if (opt) {
440 atomic_sub(opt->tot_len, &sk->sk_omem_alloc);
441 txopt_put(opt);
442 }
443}
444EXPORT_SYMBOL_GPL(inet6_destroy_sock);
445
446/*
447 * This does both peername and sockname.
448 */
449
450int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
451 int *uaddr_len, int peer)
452{
453 struct sockaddr_in6 *sin = (struct sockaddr_in6 *)uaddr;
454 struct sock *sk = sock->sk;
455 struct inet_sock *inet = inet_sk(sk);
456 struct ipv6_pinfo *np = inet6_sk(sk);
457
458 sin->sin6_family = AF_INET6;
459 sin->sin6_flowinfo = 0;
460 sin->sin6_scope_id = 0;
461 if (peer) {
462 if (!inet->inet_dport)
463 return -ENOTCONN;
464 if (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) &&
465 peer == 1)
466 return -ENOTCONN;
467 sin->sin6_port = inet->inet_dport;
468 sin->sin6_addr = sk->sk_v6_daddr;
469 if (np->sndflow)
470 sin->sin6_flowinfo = np->flow_label;
471 } else {
472 if (ipv6_addr_any(&sk->sk_v6_rcv_saddr))
473 sin->sin6_addr = np->saddr;
474 else
475 sin->sin6_addr = sk->sk_v6_rcv_saddr;
476
477 sin->sin6_port = inet->inet_sport;
478 }
479 sin->sin6_scope_id = ipv6_iface_scope_id(&sin->sin6_addr,
480 sk->sk_bound_dev_if);
481 *uaddr_len = sizeof(*sin);
482 return 0;
483}
484EXPORT_SYMBOL(inet6_getname);
485
486int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
487{
488 struct sock *sk = sock->sk;
489 struct net *net = sock_net(sk);
490
491 switch (cmd) {
492 case SIOCGSTAMP:
493 return sock_get_timestamp(sk, (struct timeval __user *)arg);
494
495 case SIOCGSTAMPNS:
496 return sock_get_timestampns(sk, (struct timespec __user *)arg);
497
498 case SIOCADDRT:
499 case SIOCDELRT:
500
501 return ipv6_route_ioctl(net, cmd, (void __user *)arg);
502
503 case SIOCSIFADDR:
504 return addrconf_add_ifaddr(net, (void __user *) arg);
505 case SIOCDIFADDR:
506 return addrconf_del_ifaddr(net, (void __user *) arg);
507 case SIOCSIFDSTADDR:
508 return addrconf_set_dstaddr(net, (void __user *) arg);
509 default:
510 if (!sk->sk_prot->ioctl)
511 return -ENOIOCTLCMD;
512 return sk->sk_prot->ioctl(sk, cmd, arg);
513 }
514 /*NOTREACHED*/
515 return 0;
516}
517EXPORT_SYMBOL(inet6_ioctl);
518
519const struct proto_ops inet6_stream_ops = {
520 .family = PF_INET6,
521 .owner = THIS_MODULE,
522 .release = inet6_release,
523 .bind = inet6_bind,
524 .connect = inet_stream_connect, /* ok */
525 .socketpair = sock_no_socketpair, /* a do nothing */
526 .accept = inet_accept, /* ok */
527 .getname = inet6_getname,
528 .poll = tcp_poll, /* ok */
529 .ioctl = inet6_ioctl, /* must change */
530 .listen = inet_listen, /* ok */
531 .shutdown = inet_shutdown, /* ok */
532 .setsockopt = sock_common_setsockopt, /* ok */
533 .getsockopt = sock_common_getsockopt, /* ok */
534 .sendmsg = inet_sendmsg, /* ok */
535 .recvmsg = inet_recvmsg, /* ok */
536 .mmap = sock_no_mmap,
537 .sendpage = inet_sendpage,
538 .splice_read = tcp_splice_read,
539#ifdef CONFIG_COMPAT
540 .compat_setsockopt = compat_sock_common_setsockopt,
541 .compat_getsockopt = compat_sock_common_getsockopt,
542#endif
543};
544
545const struct proto_ops inet6_dgram_ops = {
546 .family = PF_INET6,
547 .owner = THIS_MODULE,
548 .release = inet6_release,
549 .bind = inet6_bind,
550 .connect = inet_dgram_connect, /* ok */
551 .socketpair = sock_no_socketpair, /* a do nothing */
552 .accept = sock_no_accept, /* a do nothing */
553 .getname = inet6_getname,
554 .poll = udp_poll, /* ok */
555 .ioctl = inet6_ioctl, /* must change */
556 .listen = sock_no_listen, /* ok */
557 .shutdown = inet_shutdown, /* ok */
558 .setsockopt = sock_common_setsockopt, /* ok */
559 .getsockopt = sock_common_getsockopt, /* ok */
560 .sendmsg = inet_sendmsg, /* ok */
561 .recvmsg = inet_recvmsg, /* ok */
562 .mmap = sock_no_mmap,
563 .sendpage = sock_no_sendpage,
564#ifdef CONFIG_COMPAT
565 .compat_setsockopt = compat_sock_common_setsockopt,
566 .compat_getsockopt = compat_sock_common_getsockopt,
567#endif
568};
569
570static const struct net_proto_family inet6_family_ops = {
571 .family = PF_INET6,
572 .create = inet6_create,
573 .owner = THIS_MODULE,
574};
575
576int inet6_register_protosw(struct inet_protosw *p)
577{
578 struct list_head *lh;
579 struct inet_protosw *answer;
580 struct list_head *last_perm;
581 int protocol = p->protocol;
582 int ret;
583
584 spin_lock_bh(&inetsw6_lock);
585
586 ret = -EINVAL;
587 if (p->type >= SOCK_MAX)
588 goto out_illegal;
589
590 /* If we are trying to override a permanent protocol, bail. */
591 answer = NULL;
592 ret = -EPERM;
593 last_perm = &inetsw6[p->type];
594 list_for_each(lh, &inetsw6[p->type]) {
595 answer = list_entry(lh, struct inet_protosw, list);
596
597 /* Check only the non-wild match. */
598 if (INET_PROTOSW_PERMANENT & answer->flags) {
599 if (protocol == answer->protocol)
600 break;
601 last_perm = lh;
602 }
603
604 answer = NULL;
605 }
606 if (answer)
607 goto out_permanent;
608
609 /* Add the new entry after the last permanent entry if any, so that
610 * the new entry does not override a permanent entry when matched with
611 * a wild-card protocol. But it is allowed to override any existing
612 * non-permanent entry. This means that when we remove this entry, the
613 * system automatically returns to the old behavior.
614 */
615 list_add_rcu(&p->list, last_perm);
616 ret = 0;
617out:
618 spin_unlock_bh(&inetsw6_lock);
619 return ret;
620
621out_permanent:
622 pr_err("Attempt to override permanent protocol %d\n", protocol);
623 goto out;
624
625out_illegal:
626 pr_err("Ignoring attempt to register invalid socket type %d\n",
627 p->type);
628 goto out;
629}
630EXPORT_SYMBOL(inet6_register_protosw);
631
632void
633inet6_unregister_protosw(struct inet_protosw *p)
634{
635 if (INET_PROTOSW_PERMANENT & p->flags) {
636 pr_err("Attempt to unregister permanent protocol %d\n",
637 p->protocol);
638 } else {
639 spin_lock_bh(&inetsw6_lock);
640 list_del_rcu(&p->list);
641 spin_unlock_bh(&inetsw6_lock);
642
643 synchronize_net();
644 }
645}
646EXPORT_SYMBOL(inet6_unregister_protosw);
647
648int inet6_sk_rebuild_header(struct sock *sk)
649{
650 struct ipv6_pinfo *np = inet6_sk(sk);
651 struct dst_entry *dst;
652
653 dst = __sk_dst_check(sk, np->dst_cookie);
654
655 if (!dst) {
656 struct inet_sock *inet = inet_sk(sk);
657 struct in6_addr *final_p, final;
658 struct flowi6 fl6;
659
660 memset(&fl6, 0, sizeof(fl6));
661 fl6.flowi6_proto = sk->sk_protocol;
662 fl6.daddr = sk->sk_v6_daddr;
663 fl6.saddr = np->saddr;
664 fl6.flowlabel = np->flow_label;
665 fl6.flowi6_oif = sk->sk_bound_dev_if;
666 fl6.flowi6_mark = sk->sk_mark;
667 fl6.fl6_dport = inet->inet_dport;
668 fl6.fl6_sport = inet->inet_sport;
669 security_sk_classify_flow(sk, flowi6_to_flowi(&fl6));
670
671 rcu_read_lock();
672 final_p = fl6_update_dst(&fl6, rcu_dereference(np->opt),
673 &final);
674 rcu_read_unlock();
675
676 dst = ip6_dst_lookup_flow(sk, &fl6, final_p);
677 if (IS_ERR(dst)) {
678 sk->sk_route_caps = 0;
679 sk->sk_err_soft = -PTR_ERR(dst);
680 return PTR_ERR(dst);
681 }
682
683 ip6_dst_store(sk, dst, NULL, NULL);
684 }
685
686 return 0;
687}
688EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header);
689
690bool ipv6_opt_accepted(const struct sock *sk, const struct sk_buff *skb,
691 const struct inet6_skb_parm *opt)
692{
693 const struct ipv6_pinfo *np = inet6_sk(sk);
694
695 if (np->rxopt.all) {
696 if (((opt->flags & IP6SKB_HOPBYHOP) &&
697 (np->rxopt.bits.hopopts || np->rxopt.bits.ohopopts)) ||
698 (ip6_flowinfo((struct ipv6hdr *) skb_network_header(skb)) &&
699 np->rxopt.bits.rxflow) ||
700 (opt->srcrt && (np->rxopt.bits.srcrt ||
701 np->rxopt.bits.osrcrt)) ||
702 ((opt->dst1 || opt->dst0) &&
703 (np->rxopt.bits.dstopts || np->rxopt.bits.odstopts)))
704 return true;
705 }
706 return false;
707}
708EXPORT_SYMBOL_GPL(ipv6_opt_accepted);
709
710static struct packet_type ipv6_packet_type __read_mostly = {
711 .type = cpu_to_be16(ETH_P_IPV6),
712 .func = ipv6_rcv,
713};
714
715static int __init ipv6_packet_init(void)
716{
717 dev_add_pack(&ipv6_packet_type);
718 return 0;
719}
720
721static void ipv6_packet_cleanup(void)
722{
723 dev_remove_pack(&ipv6_packet_type);
724}
725
726static int __net_init ipv6_init_mibs(struct net *net)
727{
728 int i;
729
730 net->mib.udp_stats_in6 = alloc_percpu(struct udp_mib);
731 if (!net->mib.udp_stats_in6)
732 return -ENOMEM;
733 net->mib.udplite_stats_in6 = alloc_percpu(struct udp_mib);
734 if (!net->mib.udplite_stats_in6)
735 goto err_udplite_mib;
736 net->mib.ipv6_statistics = alloc_percpu(struct ipstats_mib);
737 if (!net->mib.ipv6_statistics)
738 goto err_ip_mib;
739
740 for_each_possible_cpu(i) {
741 struct ipstats_mib *af_inet6_stats;
742 af_inet6_stats = per_cpu_ptr(net->mib.ipv6_statistics, i);
743 u64_stats_init(&af_inet6_stats->syncp);
744 }
745
746
747 net->mib.icmpv6_statistics = alloc_percpu(struct icmpv6_mib);
748 if (!net->mib.icmpv6_statistics)
749 goto err_icmp_mib;
750 net->mib.icmpv6msg_statistics = kzalloc(sizeof(struct icmpv6msg_mib),
751 GFP_KERNEL);
752 if (!net->mib.icmpv6msg_statistics)
753 goto err_icmpmsg_mib;
754 return 0;
755
756err_icmpmsg_mib:
757 free_percpu(net->mib.icmpv6_statistics);
758err_icmp_mib:
759 free_percpu(net->mib.ipv6_statistics);
760err_ip_mib:
761 free_percpu(net->mib.udplite_stats_in6);
762err_udplite_mib:
763 free_percpu(net->mib.udp_stats_in6);
764 return -ENOMEM;
765}
766
767static void ipv6_cleanup_mibs(struct net *net)
768{
769 free_percpu(net->mib.udp_stats_in6);
770 free_percpu(net->mib.udplite_stats_in6);
771 free_percpu(net->mib.ipv6_statistics);
772 free_percpu(net->mib.icmpv6_statistics);
773 kfree(net->mib.icmpv6msg_statistics);
774}
775
776static int __net_init inet6_net_init(struct net *net)
777{
778 int err = 0;
779
780 net->ipv6.sysctl.bindv6only = 0;
781 net->ipv6.sysctl.icmpv6_time = 1*HZ;
782 net->ipv6.sysctl.flowlabel_consistency = 1;
783 net->ipv6.sysctl.auto_flowlabels = IP6_DEFAULT_AUTO_FLOW_LABELS;
784 net->ipv6.sysctl.idgen_retries = 3;
785 net->ipv6.sysctl.idgen_delay = 1 * HZ;
786 net->ipv6.sysctl.flowlabel_state_ranges = 0;
787 atomic_set(&net->ipv6.fib6_sernum, 1);
788
789 err = ipv6_init_mibs(net);
790 if (err)
791 return err;
792#ifdef CONFIG_PROC_FS
793 err = udp6_proc_init(net);
794 if (err)
795 goto out;
796 err = tcp6_proc_init(net);
797 if (err)
798 goto proc_tcp6_fail;
799 err = ac6_proc_init(net);
800 if (err)
801 goto proc_ac6_fail;
802#endif
803 return err;
804
805#ifdef CONFIG_PROC_FS
806proc_ac6_fail:
807 tcp6_proc_exit(net);
808proc_tcp6_fail:
809 udp6_proc_exit(net);
810out:
811 ipv6_cleanup_mibs(net);
812 return err;
813#endif
814}
815
816static void __net_exit inet6_net_exit(struct net *net)
817{
818#ifdef CONFIG_PROC_FS
819 udp6_proc_exit(net);
820 tcp6_proc_exit(net);
821 ac6_proc_exit(net);
822#endif
823 ipv6_cleanup_mibs(net);
824}
825
826static struct pernet_operations inet6_net_ops = {
827 .init = inet6_net_init,
828 .exit = inet6_net_exit,
829};
830
831static const struct ipv6_stub ipv6_stub_impl = {
832 .ipv6_sock_mc_join = ipv6_sock_mc_join,
833 .ipv6_sock_mc_drop = ipv6_sock_mc_drop,
834 .ipv6_dst_lookup = ip6_dst_lookup,
835 .udpv6_encap_enable = udpv6_encap_enable,
836 .ndisc_send_na = ndisc_send_na,
837 .nd_tbl = &nd_tbl,
838};
839
840static int __init inet6_init(void)
841{
842 struct list_head *r;
843 int err = 0;
844
845 sock_skb_cb_check_size(sizeof(struct inet6_skb_parm));
846
847 /* Register the socket-side information for inet6_create. */
848 for (r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r)
849 INIT_LIST_HEAD(r);
850
851 if (disable_ipv6_mod) {
852 pr_info("Loaded, but administratively disabled, reboot required to enable\n");
853 goto out;
854 }
855
856 err = proto_register(&tcpv6_prot, 1);
857 if (err)
858 goto out;
859
860 err = proto_register(&udpv6_prot, 1);
861 if (err)
862 goto out_unregister_tcp_proto;
863
864 err = proto_register(&udplitev6_prot, 1);
865 if (err)
866 goto out_unregister_udp_proto;
867
868 err = proto_register(&rawv6_prot, 1);
869 if (err)
870 goto out_unregister_udplite_proto;
871
872 err = proto_register(&pingv6_prot, 1);
873 if (err)
874 goto out_unregister_ping_proto;
875
876 /* We MUST register RAW sockets before we create the ICMP6,
877 * IGMP6, or NDISC control sockets.
878 */
879 err = rawv6_init();
880 if (err)
881 goto out_unregister_raw_proto;
882
883 /* Register the family here so that the init calls below will
884 * be able to create sockets. (?? is this dangerous ??)
885 */
886 err = sock_register(&inet6_family_ops);
887 if (err)
888 goto out_sock_register_fail;
889
890 /*
891 * ipngwg API draft makes clear that the correct semantics
892 * for TCP and UDP is to consider one TCP and UDP instance
893 * in a host available by both INET and INET6 APIs and
894 * able to communicate via both network protocols.
895 */
896
897 err = register_pernet_subsys(&inet6_net_ops);
898 if (err)
899 goto register_pernet_fail;
900 err = icmpv6_init();
901 if (err)
902 goto icmp_fail;
903 err = ip6_mr_init();
904 if (err)
905 goto ipmr_fail;
906 err = ndisc_init();
907 if (err)
908 goto ndisc_fail;
909 err = igmp6_init();
910 if (err)
911 goto igmp_fail;
912
913 ipv6_stub = &ipv6_stub_impl;
914
915 err = ipv6_netfilter_init();
916 if (err)
917 goto netfilter_fail;
918 /* Create /proc/foo6 entries. */
919#ifdef CONFIG_PROC_FS
920 err = -ENOMEM;
921 if (raw6_proc_init())
922 goto proc_raw6_fail;
923 if (udplite6_proc_init())
924 goto proc_udplite6_fail;
925 if (ipv6_misc_proc_init())
926 goto proc_misc6_fail;
927 if (if6_proc_init())
928 goto proc_if6_fail;
929#endif
930 err = ip6_route_init();
931 if (err)
932 goto ip6_route_fail;
933 err = ndisc_late_init();
934 if (err)
935 goto ndisc_late_fail;
936 err = ip6_flowlabel_init();
937 if (err)
938 goto ip6_flowlabel_fail;
939 err = addrconf_init();
940 if (err)
941 goto addrconf_fail;
942
943 /* Init v6 extension headers. */
944 err = ipv6_exthdrs_init();
945 if (err)
946 goto ipv6_exthdrs_fail;
947
948 err = ipv6_frag_init();
949 if (err)
950 goto ipv6_frag_fail;
951
952 /* Init v6 transport protocols. */
953 err = udpv6_init();
954 if (err)
955 goto udpv6_fail;
956
957 err = udplitev6_init();
958 if (err)
959 goto udplitev6_fail;
960
961 err = tcpv6_init();
962 if (err)
963 goto tcpv6_fail;
964
965 err = ipv6_packet_init();
966 if (err)
967 goto ipv6_packet_fail;
968
969 err = pingv6_init();
970 if (err)
971 goto pingv6_fail;
972
973#ifdef CONFIG_SYSCTL
974 err = ipv6_sysctl_register();
975 if (err)
976 goto sysctl_fail;
977#endif
978out:
979 return err;
980
981#ifdef CONFIG_SYSCTL
982sysctl_fail:
983 pingv6_exit();
984#endif
985pingv6_fail:
986 ipv6_packet_cleanup();
987ipv6_packet_fail:
988 tcpv6_exit();
989tcpv6_fail:
990 udplitev6_exit();
991udplitev6_fail:
992 udpv6_exit();
993udpv6_fail:
994 ipv6_frag_exit();
995ipv6_frag_fail:
996 ipv6_exthdrs_exit();
997ipv6_exthdrs_fail:
998 addrconf_cleanup();
999addrconf_fail:
1000 ip6_flowlabel_cleanup();
1001ip6_flowlabel_fail:
1002 ndisc_late_cleanup();
1003ndisc_late_fail:
1004 ip6_route_cleanup();
1005ip6_route_fail:
1006#ifdef CONFIG_PROC_FS
1007 if6_proc_exit();
1008proc_if6_fail:
1009 ipv6_misc_proc_exit();
1010proc_misc6_fail:
1011 udplite6_proc_exit();
1012proc_udplite6_fail:
1013 raw6_proc_exit();
1014proc_raw6_fail:
1015#endif
1016 ipv6_netfilter_fini();
1017netfilter_fail:
1018 igmp6_cleanup();
1019igmp_fail:
1020 ndisc_cleanup();
1021ndisc_fail:
1022 ip6_mr_cleanup();
1023ipmr_fail:
1024 icmpv6_cleanup();
1025icmp_fail:
1026 unregister_pernet_subsys(&inet6_net_ops);
1027register_pernet_fail:
1028 sock_unregister(PF_INET6);
1029 rtnl_unregister_all(PF_INET6);
1030out_sock_register_fail:
1031 rawv6_exit();
1032out_unregister_ping_proto:
1033 proto_unregister(&pingv6_prot);
1034out_unregister_raw_proto:
1035 proto_unregister(&rawv6_prot);
1036out_unregister_udplite_proto:
1037 proto_unregister(&udplitev6_prot);
1038out_unregister_udp_proto:
1039 proto_unregister(&udpv6_prot);
1040out_unregister_tcp_proto:
1041 proto_unregister(&tcpv6_prot);
1042 goto out;
1043}
1044module_init(inet6_init);
1045
1046MODULE_ALIAS_NETPROTO(PF_INET6);
1/*
2 * PF_INET6 socket protocol family
3 * Linux INET6 implementation
4 *
5 * Authors:
6 * Pedro Roque <roque@di.fc.ul.pt>
7 *
8 * Adapted from linux/net/ipv4/af_inet.c
9 *
10 * Fixes:
11 * piggy, Karl Knutson : Socket protocol table
12 * Hideaki YOSHIFUJI : sin6_scope_id support
13 * Arnaldo Melo : check proc_net_create return, cleanups
14 *
15 * This program is free software; you can redistribute it and/or
16 * modify it under the terms of the GNU General Public License
17 * as published by the Free Software Foundation; either version
18 * 2 of the License, or (at your option) any later version.
19 */
20
21#define pr_fmt(fmt) "IPv6: " fmt
22
23#include <linux/module.h>
24#include <linux/capability.h>
25#include <linux/errno.h>
26#include <linux/types.h>
27#include <linux/socket.h>
28#include <linux/in.h>
29#include <linux/kernel.h>
30#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>
40#include <linux/slab.h>
41
42#include <linux/inet.h>
43#include <linux/netdevice.h>
44#include <linux/icmpv6.h>
45#include <linux/netfilter_ipv6.h>
46
47#include <net/ip.h>
48#include <net/ipv6.h>
49#include <net/udp.h>
50#include <net/udplite.h>
51#include <net/tcp.h>
52#include <net/ping.h>
53#include <net/protocol.h>
54#include <net/inet_common.h>
55#include <net/route.h>
56#include <net/transp_v6.h>
57#include <net/ip6_route.h>
58#include <net/addrconf.h>
59#include <net/ndisc.h>
60#ifdef CONFIG_IPV6_TUNNEL
61#include <net/ip6_tunnel.h>
62#endif
63#include <net/calipso.h>
64#include <net/seg6.h>
65
66#include <linux/uaccess.h>
67#include <linux/mroute6.h>
68
69#include "ip6_offload.h"
70
71MODULE_AUTHOR("Cast of dozens");
72MODULE_DESCRIPTION("IPv6 protocol stack for Linux");
73MODULE_LICENSE("GPL");
74
75/* The inetsw6 table contains everything that inet6_create needs to
76 * build a new socket.
77 */
78static struct list_head inetsw6[SOCK_MAX];
79static DEFINE_SPINLOCK(inetsw6_lock);
80
81struct ipv6_params ipv6_defaults = {
82 .disable_ipv6 = 0,
83 .autoconf = 1,
84};
85
86static int disable_ipv6_mod;
87
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");
96
97bool ipv6_mod_enabled(void)
98{
99 return disable_ipv6_mod == 0;
100}
101EXPORT_SYMBOL_GPL(ipv6_mod_enabled);
102
103static __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
110static int inet6_create(struct net *net, struct socket *sock, int protocol,
111 int kern)
112{
113 struct inet_sock *inet;
114 struct ipv6_pinfo *np;
115 struct sock *sk;
116 struct inet_protosw *answer;
117 struct proto *answer_prot;
118 unsigned char answer_flags;
119 int try_loading_module = 0;
120 int err;
121
122 if (protocol < 0 || protocol >= IPPROTO_MAX)
123 return -EINVAL;
124
125 /* Look for the requested type/protocol pair. */
126lookup_protocol:
127 err = -ESOCKTNOSUPPORT;
128 rcu_read_lock();
129 list_for_each_entry_rcu(answer, &inetsw6[sock->type], list) {
130
131 err = 0;
132 /* 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 }
145 err = -EPROTONOSUPPORT;
146 }
147
148 if (err) {
149 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;
171 if (sock->type == SOCK_RAW && !kern &&
172 !ns_capable(net->user_ns, CAP_NET_RAW))
173 goto out_rcu_unlock;
174
175 sock->ops = answer->ops;
176 answer_prot = answer->prot;
177 answer_flags = answer->flags;
178 rcu_read_unlock();
179
180 WARN_ON(!answer_prot->slab);
181
182 err = -ENOBUFS;
183 sk = sk_alloc(net, PF_INET6, GFP_KERNEL, answer_prot, kern);
184 if (!sk)
185 goto out;
186
187 sock_init_data(sock, sk);
188
189 err = 0;
190 if (INET_PROTOSW_REUSE & answer_flags)
191 sk->sk_reuse = SK_CAN_REUSE;
192
193 inet = inet_sk(sk);
194 inet->is_icsk = (INET_PROTOSW_ICSK & answer_flags) != 0;
195
196 if (SOCK_RAW == sock->type) {
197 inet->inet_num = protocol;
198 if (IPPROTO_RAW == protocol)
199 inet->hdrincl = 1;
200 }
201
202 sk->sk_destruct = inet_sock_destruct;
203 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;
210 np->mcast_hops = IPV6_DEFAULT_MCASTHOPS;
211 np->mc_loop = 1;
212 np->pmtudisc = IPV6_PMTUDISC_WANT;
213 np->repflow = net->ipv6.sysctl.flowlabel_reflect;
214 sk->sk_ipv6only = net->ipv6.sysctl.bindv6only;
215
216 /* Init the ipv4 part of the socket since we can have sockets
217 * using v6 API for ipv4.
218 */
219 inet->uc_ttl = -1;
220
221 inet->mc_loop = 1;
222 inet->mc_ttl = 1;
223 inet->mc_index = 0;
224 inet->mc_list = NULL;
225 inet->rcv_tos = 0;
226
227 if (net->ipv4.sysctl_ip_no_pmtu_disc)
228 inet->pmtudisc = IP_PMTUDISC_DONT;
229 else
230 inet->pmtudisc = IP_PMTUDISC_WANT;
231 /*
232 * Increment only the relevant sk_prot->socks debug field, this changes
233 * the previous behaviour of incrementing both the equivalent to
234 * answer->prot->socks (inet6_sock_nr) and inet_sock_nr.
235 *
236 * This allows better debug granularity as we'll know exactly how many
237 * UDPv6, TCPv6, etc socks were allocated, not the sum of all IPv6
238 * transport protocol socks. -acme
239 */
240 sk_refcnt_debug_inc(sk);
241
242 if (inet->inet_num) {
243 /* It assumes that any protocol which allows
244 * the user to assign a number at socket
245 * creation time automatically shares.
246 */
247 inet->inet_sport = htons(inet->inet_num);
248 err = sk->sk_prot->hash(sk);
249 if (err) {
250 sk_common_release(sk);
251 goto out;
252 }
253 }
254 if (sk->sk_prot->init) {
255 err = sk->sk_prot->init(sk);
256 if (err) {
257 sk_common_release(sk);
258 goto out;
259 }
260 }
261
262 if (!kern) {
263 err = BPF_CGROUP_RUN_PROG_INET_SOCK(sk);
264 if (err) {
265 sk_common_release(sk);
266 goto out;
267 }
268 }
269out:
270 return err;
271out_rcu_unlock:
272 rcu_read_unlock();
273 goto out;
274}
275
276
277/* bind for INET6 API */
278int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
279{
280 struct sock *sk = sock->sk;
281 int err = 0;
282
283 /* If the socket has its own bind function then use it. */
284 if (sk->sk_prot->bind)
285 return sk->sk_prot->bind(sk, uaddr, addr_len);
286
287 if (addr_len < SIN6_LEN_RFC2133)
288 return -EINVAL;
289
290 /* BPF prog is run before any checks are done so that if the prog
291 * changes context in a wrong way it will be caught.
292 */
293 err = BPF_CGROUP_RUN_PROG_INET6_BIND(sk, uaddr);
294 if (err)
295 return err;
296
297 return __inet6_bind(sk, uaddr, addr_len, false, true);
298}
299EXPORT_SYMBOL(inet6_bind);
300
301int __inet6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len,
302 bool force_bind_address_no_port, bool with_lock)
303{
304 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)uaddr;
305 struct inet_sock *inet = inet_sk(sk);
306 struct ipv6_pinfo *np = inet6_sk(sk);
307 struct net *net = sock_net(sk);
308 __be32 v4addr = 0;
309 unsigned short snum;
310 bool saved_ipv6only;
311 int addr_type = 0;
312 int err = 0;
313
314 if (addr->sin6_family != AF_INET6)
315 return -EAFNOSUPPORT;
316
317 addr_type = ipv6_addr_type(&addr->sin6_addr);
318 if ((addr_type & IPV6_ADDR_MULTICAST) && sk->sk_type == SOCK_STREAM)
319 return -EINVAL;
320
321 snum = ntohs(addr->sin6_port);
322 if (snum && snum < inet_prot_sock(net) &&
323 !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE))
324 return -EACCES;
325
326 if (with_lock)
327 lock_sock(sk);
328
329 /* Check these errors (active socket, double bind). */
330 if (sk->sk_state != TCP_CLOSE || inet->inet_num) {
331 err = -EINVAL;
332 goto out;
333 }
334
335 /* Check if the address belongs to the host. */
336 if (addr_type == IPV6_ADDR_MAPPED) {
337 int chk_addr_ret;
338
339 /* Binding to v4-mapped address on a v6-only socket
340 * makes no sense
341 */
342 if (sk->sk_ipv6only) {
343 err = -EINVAL;
344 goto out;
345 }
346
347 /* Reproduce AF_INET checks to make the bindings consistent */
348 v4addr = addr->sin6_addr.s6_addr32[3];
349 chk_addr_ret = inet_addr_type(net, v4addr);
350 if (!net->ipv4.sysctl_ip_nonlocal_bind &&
351 !(inet->freebind || inet->transparent) &&
352 v4addr != htonl(INADDR_ANY) &&
353 chk_addr_ret != RTN_LOCAL &&
354 chk_addr_ret != RTN_MULTICAST &&
355 chk_addr_ret != RTN_BROADCAST) {
356 err = -EADDRNOTAVAIL;
357 goto out;
358 }
359 } else {
360 if (addr_type != IPV6_ADDR_ANY) {
361 struct net_device *dev = NULL;
362
363 rcu_read_lock();
364 if (__ipv6_addr_needs_scope_id(addr_type)) {
365 if (addr_len >= sizeof(struct sockaddr_in6) &&
366 addr->sin6_scope_id) {
367 /* Override any existing binding, if another one
368 * is supplied by user.
369 */
370 sk->sk_bound_dev_if = addr->sin6_scope_id;
371 }
372
373 /* Binding to link-local address requires an interface */
374 if (!sk->sk_bound_dev_if) {
375 err = -EINVAL;
376 goto out_unlock;
377 }
378 dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if);
379 if (!dev) {
380 err = -ENODEV;
381 goto out_unlock;
382 }
383 }
384
385 /* ipv4 addr of the socket is invalid. Only the
386 * unspecified and mapped address have a v4 equivalent.
387 */
388 v4addr = LOOPBACK4_IPV6;
389 if (!(addr_type & IPV6_ADDR_MULTICAST)) {
390 if (!net->ipv6.sysctl.ip_nonlocal_bind &&
391 !(inet->freebind || inet->transparent) &&
392 !ipv6_chk_addr(net, &addr->sin6_addr,
393 dev, 0)) {
394 err = -EADDRNOTAVAIL;
395 goto out_unlock;
396 }
397 }
398 rcu_read_unlock();
399 }
400 }
401
402 inet->inet_rcv_saddr = v4addr;
403 inet->inet_saddr = v4addr;
404
405 sk->sk_v6_rcv_saddr = addr->sin6_addr;
406
407 if (!(addr_type & IPV6_ADDR_MULTICAST))
408 np->saddr = addr->sin6_addr;
409
410 saved_ipv6only = sk->sk_ipv6only;
411 if (addr_type != IPV6_ADDR_ANY && addr_type != IPV6_ADDR_MAPPED)
412 sk->sk_ipv6only = 1;
413
414 /* Make sure we are allowed to bind here. */
415 if (snum || !(inet->bind_address_no_port ||
416 force_bind_address_no_port)) {
417 if (sk->sk_prot->get_port(sk, snum)) {
418 sk->sk_ipv6only = saved_ipv6only;
419 inet_reset_saddr(sk);
420 err = -EADDRINUSE;
421 goto out;
422 }
423 err = BPF_CGROUP_RUN_PROG_INET6_POST_BIND(sk);
424 if (err) {
425 sk->sk_ipv6only = saved_ipv6only;
426 inet_reset_saddr(sk);
427 goto out;
428 }
429 }
430
431 if (addr_type != IPV6_ADDR_ANY)
432 sk->sk_userlocks |= SOCK_BINDADDR_LOCK;
433 if (snum)
434 sk->sk_userlocks |= SOCK_BINDPORT_LOCK;
435 inet->inet_sport = htons(inet->inet_num);
436 inet->inet_dport = 0;
437 inet->inet_daddr = 0;
438out:
439 if (with_lock)
440 release_sock(sk);
441 return err;
442out_unlock:
443 rcu_read_unlock();
444 goto out;
445}
446
447int inet6_release(struct socket *sock)
448{
449 struct sock *sk = sock->sk;
450
451 if (!sk)
452 return -EINVAL;
453
454 /* Free mc lists */
455 ipv6_sock_mc_close(sk);
456
457 /* Free ac lists */
458 ipv6_sock_ac_close(sk);
459
460 return inet_release(sock);
461}
462EXPORT_SYMBOL(inet6_release);
463
464void inet6_destroy_sock(struct sock *sk)
465{
466 struct ipv6_pinfo *np = inet6_sk(sk);
467 struct sk_buff *skb;
468 struct ipv6_txoptions *opt;
469
470 /* Release rx options */
471
472 skb = xchg(&np->pktoptions, NULL);
473 if (skb)
474 kfree_skb(skb);
475
476 skb = xchg(&np->rxpmtu, NULL);
477 if (skb)
478 kfree_skb(skb);
479
480 /* Free flowlabels */
481 fl6_free_socklist(sk);
482
483 /* Free tx options */
484
485 opt = xchg((__force struct ipv6_txoptions **)&np->opt, NULL);
486 if (opt) {
487 atomic_sub(opt->tot_len, &sk->sk_omem_alloc);
488 txopt_put(opt);
489 }
490}
491EXPORT_SYMBOL_GPL(inet6_destroy_sock);
492
493/*
494 * This does both peername and sockname.
495 */
496
497int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
498 int peer)
499{
500 struct sockaddr_in6 *sin = (struct sockaddr_in6 *)uaddr;
501 struct sock *sk = sock->sk;
502 struct inet_sock *inet = inet_sk(sk);
503 struct ipv6_pinfo *np = inet6_sk(sk);
504
505 sin->sin6_family = AF_INET6;
506 sin->sin6_flowinfo = 0;
507 sin->sin6_scope_id = 0;
508 if (peer) {
509 if (!inet->inet_dport)
510 return -ENOTCONN;
511 if (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) &&
512 peer == 1)
513 return -ENOTCONN;
514 sin->sin6_port = inet->inet_dport;
515 sin->sin6_addr = sk->sk_v6_daddr;
516 if (np->sndflow)
517 sin->sin6_flowinfo = np->flow_label;
518 } else {
519 if (ipv6_addr_any(&sk->sk_v6_rcv_saddr))
520 sin->sin6_addr = np->saddr;
521 else
522 sin->sin6_addr = sk->sk_v6_rcv_saddr;
523
524 sin->sin6_port = inet->inet_sport;
525 }
526 sin->sin6_scope_id = ipv6_iface_scope_id(&sin->sin6_addr,
527 sk->sk_bound_dev_if);
528 return sizeof(*sin);
529}
530EXPORT_SYMBOL(inet6_getname);
531
532int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
533{
534 struct sock *sk = sock->sk;
535 struct net *net = sock_net(sk);
536
537 switch (cmd) {
538 case SIOCGSTAMP:
539 return sock_get_timestamp(sk, (struct timeval __user *)arg);
540
541 case SIOCGSTAMPNS:
542 return sock_get_timestampns(sk, (struct timespec __user *)arg);
543
544 case SIOCADDRT:
545 case SIOCDELRT:
546
547 return ipv6_route_ioctl(net, cmd, (void __user *)arg);
548
549 case SIOCSIFADDR:
550 return addrconf_add_ifaddr(net, (void __user *) arg);
551 case SIOCDIFADDR:
552 return addrconf_del_ifaddr(net, (void __user *) arg);
553 case SIOCSIFDSTADDR:
554 return addrconf_set_dstaddr(net, (void __user *) arg);
555 default:
556 if (!sk->sk_prot->ioctl)
557 return -ENOIOCTLCMD;
558 return sk->sk_prot->ioctl(sk, cmd, arg);
559 }
560 /*NOTREACHED*/
561 return 0;
562}
563EXPORT_SYMBOL(inet6_ioctl);
564
565const struct proto_ops inet6_stream_ops = {
566 .family = PF_INET6,
567 .owner = THIS_MODULE,
568 .release = inet6_release,
569 .bind = inet6_bind,
570 .connect = inet_stream_connect, /* ok */
571 .socketpair = sock_no_socketpair, /* a do nothing */
572 .accept = inet_accept, /* ok */
573 .getname = inet6_getname,
574 .poll = tcp_poll, /* ok */
575 .ioctl = inet6_ioctl, /* must change */
576 .listen = inet_listen, /* ok */
577 .shutdown = inet_shutdown, /* ok */
578 .setsockopt = sock_common_setsockopt, /* ok */
579 .getsockopt = sock_common_getsockopt, /* ok */
580 .sendmsg = inet_sendmsg, /* ok */
581 .recvmsg = inet_recvmsg, /* ok */
582 .mmap = sock_no_mmap,
583 .sendpage = inet_sendpage,
584 .sendmsg_locked = tcp_sendmsg_locked,
585 .sendpage_locked = tcp_sendpage_locked,
586 .splice_read = tcp_splice_read,
587 .read_sock = tcp_read_sock,
588 .peek_len = tcp_peek_len,
589#ifdef CONFIG_COMPAT
590 .compat_setsockopt = compat_sock_common_setsockopt,
591 .compat_getsockopt = compat_sock_common_getsockopt,
592#endif
593};
594
595const struct proto_ops inet6_dgram_ops = {
596 .family = PF_INET6,
597 .owner = THIS_MODULE,
598 .release = inet6_release,
599 .bind = inet6_bind,
600 .connect = inet_dgram_connect, /* ok */
601 .socketpair = sock_no_socketpair, /* a do nothing */
602 .accept = sock_no_accept, /* a do nothing */
603 .getname = inet6_getname,
604 .poll = udp_poll, /* ok */
605 .ioctl = inet6_ioctl, /* must change */
606 .listen = sock_no_listen, /* ok */
607 .shutdown = inet_shutdown, /* ok */
608 .setsockopt = sock_common_setsockopt, /* ok */
609 .getsockopt = sock_common_getsockopt, /* ok */
610 .sendmsg = inet_sendmsg, /* ok */
611 .recvmsg = inet_recvmsg, /* ok */
612 .mmap = sock_no_mmap,
613 .sendpage = sock_no_sendpage,
614 .set_peek_off = sk_set_peek_off,
615#ifdef CONFIG_COMPAT
616 .compat_setsockopt = compat_sock_common_setsockopt,
617 .compat_getsockopt = compat_sock_common_getsockopt,
618#endif
619};
620
621static const struct net_proto_family inet6_family_ops = {
622 .family = PF_INET6,
623 .create = inet6_create,
624 .owner = THIS_MODULE,
625};
626
627int inet6_register_protosw(struct inet_protosw *p)
628{
629 struct list_head *lh;
630 struct inet_protosw *answer;
631 struct list_head *last_perm;
632 int protocol = p->protocol;
633 int ret;
634
635 spin_lock_bh(&inetsw6_lock);
636
637 ret = -EINVAL;
638 if (p->type >= SOCK_MAX)
639 goto out_illegal;
640
641 /* If we are trying to override a permanent protocol, bail. */
642 answer = NULL;
643 ret = -EPERM;
644 last_perm = &inetsw6[p->type];
645 list_for_each(lh, &inetsw6[p->type]) {
646 answer = list_entry(lh, struct inet_protosw, list);
647
648 /* Check only the non-wild match. */
649 if (INET_PROTOSW_PERMANENT & answer->flags) {
650 if (protocol == answer->protocol)
651 break;
652 last_perm = lh;
653 }
654
655 answer = NULL;
656 }
657 if (answer)
658 goto out_permanent;
659
660 /* Add the new entry after the last permanent entry if any, so that
661 * the new entry does not override a permanent entry when matched with
662 * a wild-card protocol. But it is allowed to override any existing
663 * non-permanent entry. This means that when we remove this entry, the
664 * system automatically returns to the old behavior.
665 */
666 list_add_rcu(&p->list, last_perm);
667 ret = 0;
668out:
669 spin_unlock_bh(&inetsw6_lock);
670 return ret;
671
672out_permanent:
673 pr_err("Attempt to override permanent protocol %d\n", protocol);
674 goto out;
675
676out_illegal:
677 pr_err("Ignoring attempt to register invalid socket type %d\n",
678 p->type);
679 goto out;
680}
681EXPORT_SYMBOL(inet6_register_protosw);
682
683void
684inet6_unregister_protosw(struct inet_protosw *p)
685{
686 if (INET_PROTOSW_PERMANENT & p->flags) {
687 pr_err("Attempt to unregister permanent protocol %d\n",
688 p->protocol);
689 } else {
690 spin_lock_bh(&inetsw6_lock);
691 list_del_rcu(&p->list);
692 spin_unlock_bh(&inetsw6_lock);
693
694 synchronize_net();
695 }
696}
697EXPORT_SYMBOL(inet6_unregister_protosw);
698
699int inet6_sk_rebuild_header(struct sock *sk)
700{
701 struct ipv6_pinfo *np = inet6_sk(sk);
702 struct dst_entry *dst;
703
704 dst = __sk_dst_check(sk, np->dst_cookie);
705
706 if (!dst) {
707 struct inet_sock *inet = inet_sk(sk);
708 struct in6_addr *final_p, final;
709 struct flowi6 fl6;
710
711 memset(&fl6, 0, sizeof(fl6));
712 fl6.flowi6_proto = sk->sk_protocol;
713 fl6.daddr = sk->sk_v6_daddr;
714 fl6.saddr = np->saddr;
715 fl6.flowlabel = np->flow_label;
716 fl6.flowi6_oif = sk->sk_bound_dev_if;
717 fl6.flowi6_mark = sk->sk_mark;
718 fl6.fl6_dport = inet->inet_dport;
719 fl6.fl6_sport = inet->inet_sport;
720 fl6.flowi6_uid = sk->sk_uid;
721 security_sk_classify_flow(sk, flowi6_to_flowi(&fl6));
722
723 rcu_read_lock();
724 final_p = fl6_update_dst(&fl6, rcu_dereference(np->opt),
725 &final);
726 rcu_read_unlock();
727
728 dst = ip6_dst_lookup_flow(sk, &fl6, final_p);
729 if (IS_ERR(dst)) {
730 sk->sk_route_caps = 0;
731 sk->sk_err_soft = -PTR_ERR(dst);
732 return PTR_ERR(dst);
733 }
734
735 ip6_dst_store(sk, dst, NULL, NULL);
736 }
737
738 return 0;
739}
740EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header);
741
742bool ipv6_opt_accepted(const struct sock *sk, const struct sk_buff *skb,
743 const struct inet6_skb_parm *opt)
744{
745 const struct ipv6_pinfo *np = inet6_sk(sk);
746
747 if (np->rxopt.all) {
748 if (((opt->flags & IP6SKB_HOPBYHOP) &&
749 (np->rxopt.bits.hopopts || np->rxopt.bits.ohopopts)) ||
750 (ip6_flowinfo((struct ipv6hdr *) skb_network_header(skb)) &&
751 np->rxopt.bits.rxflow) ||
752 (opt->srcrt && (np->rxopt.bits.srcrt ||
753 np->rxopt.bits.osrcrt)) ||
754 ((opt->dst1 || opt->dst0) &&
755 (np->rxopt.bits.dstopts || np->rxopt.bits.odstopts)))
756 return true;
757 }
758 return false;
759}
760EXPORT_SYMBOL_GPL(ipv6_opt_accepted);
761
762static struct packet_type ipv6_packet_type __read_mostly = {
763 .type = cpu_to_be16(ETH_P_IPV6),
764 .func = ipv6_rcv,
765};
766
767static int __init ipv6_packet_init(void)
768{
769 dev_add_pack(&ipv6_packet_type);
770 return 0;
771}
772
773static void ipv6_packet_cleanup(void)
774{
775 dev_remove_pack(&ipv6_packet_type);
776}
777
778static int __net_init ipv6_init_mibs(struct net *net)
779{
780 int i;
781
782 net->mib.udp_stats_in6 = alloc_percpu(struct udp_mib);
783 if (!net->mib.udp_stats_in6)
784 return -ENOMEM;
785 net->mib.udplite_stats_in6 = alloc_percpu(struct udp_mib);
786 if (!net->mib.udplite_stats_in6)
787 goto err_udplite_mib;
788 net->mib.ipv6_statistics = alloc_percpu(struct ipstats_mib);
789 if (!net->mib.ipv6_statistics)
790 goto err_ip_mib;
791
792 for_each_possible_cpu(i) {
793 struct ipstats_mib *af_inet6_stats;
794 af_inet6_stats = per_cpu_ptr(net->mib.ipv6_statistics, i);
795 u64_stats_init(&af_inet6_stats->syncp);
796 }
797
798
799 net->mib.icmpv6_statistics = alloc_percpu(struct icmpv6_mib);
800 if (!net->mib.icmpv6_statistics)
801 goto err_icmp_mib;
802 net->mib.icmpv6msg_statistics = kzalloc(sizeof(struct icmpv6msg_mib),
803 GFP_KERNEL);
804 if (!net->mib.icmpv6msg_statistics)
805 goto err_icmpmsg_mib;
806 return 0;
807
808err_icmpmsg_mib:
809 free_percpu(net->mib.icmpv6_statistics);
810err_icmp_mib:
811 free_percpu(net->mib.ipv6_statistics);
812err_ip_mib:
813 free_percpu(net->mib.udplite_stats_in6);
814err_udplite_mib:
815 free_percpu(net->mib.udp_stats_in6);
816 return -ENOMEM;
817}
818
819static void ipv6_cleanup_mibs(struct net *net)
820{
821 free_percpu(net->mib.udp_stats_in6);
822 free_percpu(net->mib.udplite_stats_in6);
823 free_percpu(net->mib.ipv6_statistics);
824 free_percpu(net->mib.icmpv6_statistics);
825 kfree(net->mib.icmpv6msg_statistics);
826}
827
828static int __net_init inet6_net_init(struct net *net)
829{
830 int err = 0;
831
832 net->ipv6.sysctl.bindv6only = 0;
833 net->ipv6.sysctl.icmpv6_time = 1*HZ;
834 net->ipv6.sysctl.flowlabel_consistency = 1;
835 net->ipv6.sysctl.auto_flowlabels = IP6_DEFAULT_AUTO_FLOW_LABELS;
836 net->ipv6.sysctl.idgen_retries = 3;
837 net->ipv6.sysctl.idgen_delay = 1 * HZ;
838 net->ipv6.sysctl.flowlabel_state_ranges = 0;
839 net->ipv6.sysctl.max_dst_opts_cnt = IP6_DEFAULT_MAX_DST_OPTS_CNT;
840 net->ipv6.sysctl.max_hbh_opts_cnt = IP6_DEFAULT_MAX_HBH_OPTS_CNT;
841 net->ipv6.sysctl.max_dst_opts_len = IP6_DEFAULT_MAX_DST_OPTS_LEN;
842 net->ipv6.sysctl.max_hbh_opts_len = IP6_DEFAULT_MAX_HBH_OPTS_LEN;
843 atomic_set(&net->ipv6.fib6_sernum, 1);
844
845 err = ipv6_init_mibs(net);
846 if (err)
847 return err;
848#ifdef CONFIG_PROC_FS
849 err = udp6_proc_init(net);
850 if (err)
851 goto out;
852 err = tcp6_proc_init(net);
853 if (err)
854 goto proc_tcp6_fail;
855 err = ac6_proc_init(net);
856 if (err)
857 goto proc_ac6_fail;
858#endif
859 return err;
860
861#ifdef CONFIG_PROC_FS
862proc_ac6_fail:
863 tcp6_proc_exit(net);
864proc_tcp6_fail:
865 udp6_proc_exit(net);
866out:
867 ipv6_cleanup_mibs(net);
868 return err;
869#endif
870}
871
872static void __net_exit inet6_net_exit(struct net *net)
873{
874#ifdef CONFIG_PROC_FS
875 udp6_proc_exit(net);
876 tcp6_proc_exit(net);
877 ac6_proc_exit(net);
878#endif
879 ipv6_cleanup_mibs(net);
880}
881
882static struct pernet_operations inet6_net_ops = {
883 .init = inet6_net_init,
884 .exit = inet6_net_exit,
885};
886
887static const struct ipv6_stub ipv6_stub_impl = {
888 .ipv6_sock_mc_join = ipv6_sock_mc_join,
889 .ipv6_sock_mc_drop = ipv6_sock_mc_drop,
890 .ipv6_dst_lookup = ip6_dst_lookup,
891 .udpv6_encap_enable = udpv6_encap_enable,
892 .ndisc_send_na = ndisc_send_na,
893 .nd_tbl = &nd_tbl,
894};
895
896static const struct ipv6_bpf_stub ipv6_bpf_stub_impl = {
897 .inet6_bind = __inet6_bind,
898};
899
900static int __init inet6_init(void)
901{
902 struct list_head *r;
903 int err = 0;
904
905 sock_skb_cb_check_size(sizeof(struct inet6_skb_parm));
906
907 /* Register the socket-side information for inet6_create. */
908 for (r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r)
909 INIT_LIST_HEAD(r);
910
911 if (disable_ipv6_mod) {
912 pr_info("Loaded, but administratively disabled, reboot required to enable\n");
913 goto out;
914 }
915
916 err = proto_register(&tcpv6_prot, 1);
917 if (err)
918 goto out;
919
920 err = proto_register(&udpv6_prot, 1);
921 if (err)
922 goto out_unregister_tcp_proto;
923
924 err = proto_register(&udplitev6_prot, 1);
925 if (err)
926 goto out_unregister_udp_proto;
927
928 err = proto_register(&rawv6_prot, 1);
929 if (err)
930 goto out_unregister_udplite_proto;
931
932 err = proto_register(&pingv6_prot, 1);
933 if (err)
934 goto out_unregister_ping_proto;
935
936 /* We MUST register RAW sockets before we create the ICMP6,
937 * IGMP6, or NDISC control sockets.
938 */
939 err = rawv6_init();
940 if (err)
941 goto out_unregister_raw_proto;
942
943 /* Register the family here so that the init calls below will
944 * be able to create sockets. (?? is this dangerous ??)
945 */
946 err = sock_register(&inet6_family_ops);
947 if (err)
948 goto out_sock_register_fail;
949
950 /*
951 * ipngwg API draft makes clear that the correct semantics
952 * for TCP and UDP is to consider one TCP and UDP instance
953 * in a host available by both INET and INET6 APIs and
954 * able to communicate via both network protocols.
955 */
956
957 err = register_pernet_subsys(&inet6_net_ops);
958 if (err)
959 goto register_pernet_fail;
960 err = ip6_mr_init();
961 if (err)
962 goto ipmr_fail;
963 err = icmpv6_init();
964 if (err)
965 goto icmp_fail;
966 err = ndisc_init();
967 if (err)
968 goto ndisc_fail;
969 err = igmp6_init();
970 if (err)
971 goto igmp_fail;
972
973 err = ipv6_netfilter_init();
974 if (err)
975 goto netfilter_fail;
976 /* Create /proc/foo6 entries. */
977#ifdef CONFIG_PROC_FS
978 err = -ENOMEM;
979 if (raw6_proc_init())
980 goto proc_raw6_fail;
981 if (udplite6_proc_init())
982 goto proc_udplite6_fail;
983 if (ipv6_misc_proc_init())
984 goto proc_misc6_fail;
985 if (if6_proc_init())
986 goto proc_if6_fail;
987#endif
988 err = ip6_route_init();
989 if (err)
990 goto ip6_route_fail;
991 err = ndisc_late_init();
992 if (err)
993 goto ndisc_late_fail;
994 err = ip6_flowlabel_init();
995 if (err)
996 goto ip6_flowlabel_fail;
997 err = addrconf_init();
998 if (err)
999 goto addrconf_fail;
1000
1001 /* Init v6 extension headers. */
1002 err = ipv6_exthdrs_init();
1003 if (err)
1004 goto ipv6_exthdrs_fail;
1005
1006 err = ipv6_frag_init();
1007 if (err)
1008 goto ipv6_frag_fail;
1009
1010 /* Init v6 transport protocols. */
1011 err = udpv6_init();
1012 if (err)
1013 goto udpv6_fail;
1014
1015 err = udplitev6_init();
1016 if (err)
1017 goto udplitev6_fail;
1018
1019 err = udpv6_offload_init();
1020 if (err)
1021 goto udpv6_offload_fail;
1022
1023 err = tcpv6_init();
1024 if (err)
1025 goto tcpv6_fail;
1026
1027 err = ipv6_packet_init();
1028 if (err)
1029 goto ipv6_packet_fail;
1030
1031 err = pingv6_init();
1032 if (err)
1033 goto pingv6_fail;
1034
1035 err = calipso_init();
1036 if (err)
1037 goto calipso_fail;
1038
1039 err = seg6_init();
1040 if (err)
1041 goto seg6_fail;
1042
1043 err = igmp6_late_init();
1044 if (err)
1045 goto igmp6_late_err;
1046
1047#ifdef CONFIG_SYSCTL
1048 err = ipv6_sysctl_register();
1049 if (err)
1050 goto sysctl_fail;
1051#endif
1052
1053 /* ensure that ipv6 stubs are visible only after ipv6 is ready */
1054 wmb();
1055 ipv6_stub = &ipv6_stub_impl;
1056 ipv6_bpf_stub = &ipv6_bpf_stub_impl;
1057out:
1058 return err;
1059
1060#ifdef CONFIG_SYSCTL
1061sysctl_fail:
1062 igmp6_late_cleanup();
1063#endif
1064igmp6_late_err:
1065 seg6_exit();
1066seg6_fail:
1067 calipso_exit();
1068calipso_fail:
1069 pingv6_exit();
1070pingv6_fail:
1071 ipv6_packet_cleanup();
1072ipv6_packet_fail:
1073 tcpv6_exit();
1074tcpv6_fail:
1075 udpv6_offload_exit();
1076udpv6_offload_fail:
1077 udplitev6_exit();
1078udplitev6_fail:
1079 udpv6_exit();
1080udpv6_fail:
1081 ipv6_frag_exit();
1082ipv6_frag_fail:
1083 ipv6_exthdrs_exit();
1084ipv6_exthdrs_fail:
1085 addrconf_cleanup();
1086addrconf_fail:
1087 ip6_flowlabel_cleanup();
1088ip6_flowlabel_fail:
1089 ndisc_late_cleanup();
1090ndisc_late_fail:
1091 ip6_route_cleanup();
1092ip6_route_fail:
1093#ifdef CONFIG_PROC_FS
1094 if6_proc_exit();
1095proc_if6_fail:
1096 ipv6_misc_proc_exit();
1097proc_misc6_fail:
1098 udplite6_proc_exit();
1099proc_udplite6_fail:
1100 raw6_proc_exit();
1101proc_raw6_fail:
1102#endif
1103 ipv6_netfilter_fini();
1104netfilter_fail:
1105 igmp6_cleanup();
1106igmp_fail:
1107 ndisc_cleanup();
1108ndisc_fail:
1109 ip6_mr_cleanup();
1110icmp_fail:
1111 unregister_pernet_subsys(&inet6_net_ops);
1112ipmr_fail:
1113 icmpv6_cleanup();
1114register_pernet_fail:
1115 sock_unregister(PF_INET6);
1116 rtnl_unregister_all(PF_INET6);
1117out_sock_register_fail:
1118 rawv6_exit();
1119out_unregister_ping_proto:
1120 proto_unregister(&pingv6_prot);
1121out_unregister_raw_proto:
1122 proto_unregister(&rawv6_prot);
1123out_unregister_udplite_proto:
1124 proto_unregister(&udplitev6_prot);
1125out_unregister_udp_proto:
1126 proto_unregister(&udpv6_prot);
1127out_unregister_tcp_proto:
1128 proto_unregister(&tcpv6_prot);
1129 goto out;
1130}
1131module_init(inet6_init);
1132
1133MODULE_ALIAS_NETPROTO(PF_INET6);