1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * PF_INET6 socket protocol family
4 * Linux INET6 implementation
5 *
6 * Authors:
7 * Pedro Roque <roque@di.fc.ul.pt>
8 *
9 * Adapted from linux/net/ipv4/af_inet.c
10 *
11 * Fixes:
12 * piggy, Karl Knutson : Socket protocol table
13 * Hideaki YOSHIFUJI : sin6_scope_id support
14 * Arnaldo Melo : check proc_net_create return, cleanups
15 */
16
17 #define pr_fmt(fmt) "IPv6: " fmt
18
19 #include <linux/module.h>
20 #include <linux/capability.h>
21 #include <linux/errno.h>
22 #include <linux/types.h>
23 #include <linux/socket.h>
24 #include <linux/in.h>
25 #include <linux/kernel.h>
26 #include <linux/timer.h>
27 #include <linux/string.h>
28 #include <linux/sockios.h>
29 #include <linux/net.h>
30 #include <linux/fcntl.h>
31 #include <linux/mm.h>
32 #include <linux/interrupt.h>
33 #include <linux/proc_fs.h>
34 #include <linux/stat.h>
35 #include <linux/init.h>
36 #include <linux/slab.h>
37
38 #include <linux/inet.h>
39 #include <linux/netdevice.h>
40 #include <linux/icmpv6.h>
41 #include <linux/netfilter_ipv6.h>
42
43 #include <net/ip.h>
44 #include <net/ipv6.h>
45 #include <net/udp.h>
46 #include <net/udplite.h>
47 #include <net/tcp.h>
48 #include <net/ping.h>
49 #include <net/protocol.h>
50 #include <net/inet_common.h>
51 #include <net/route.h>
52 #include <net/transp_v6.h>
53 #include <net/ip6_route.h>
54 #include <net/addrconf.h>
55 #include <net/ipv6_stubs.h>
56 #include <net/ndisc.h>
57 #ifdef CONFIG_IPV6_TUNNEL
58 #include <net/ip6_tunnel.h>
59 #endif
60 #include <net/calipso.h>
61 #include <net/seg6.h>
62 #include <net/rpl.h>
63 #include <net/compat.h>
64 #include <net/xfrm.h>
65 #include <net/ioam6.h>
66 #include <net/rawv6.h>
67
68 #include <linux/uaccess.h>
69 #include <linux/mroute6.h>
70
71 #include "ip6_offload.h"
72
73 MODULE_AUTHOR("Cast of dozens");
74 MODULE_DESCRIPTION("IPv6 protocol stack for Linux");
75 MODULE_LICENSE("GPL");
76
77 /* The inetsw6 table contains everything that inet6_create needs to
78 * build a new socket.
79 */
80 static struct list_head inetsw6[SOCK_MAX];
81 static DEFINE_SPINLOCK(inetsw6_lock);
82
83 struct ipv6_params ipv6_defaults = {
84 .disable_ipv6 = 0,
85 .autoconf = 1,
86 };
87
88 static int disable_ipv6_mod;
89
90 module_param_named(disable, disable_ipv6_mod, int, 0444);
91 MODULE_PARM_DESC(disable, "Disable IPv6 module such that it is non-functional");
92
93 module_param_named(disable_ipv6, ipv6_defaults.disable_ipv6, int, 0444);
94 MODULE_PARM_DESC(disable_ipv6, "Disable IPv6 on all interfaces");
95
96 module_param_named(autoconf, ipv6_defaults.autoconf, int, 0444);
97 MODULE_PARM_DESC(autoconf, "Enable IPv6 address autoconfiguration on all interfaces");
98
ipv6_mod_enabled(void)99 bool ipv6_mod_enabled(void)
100 {
101 return disable_ipv6_mod == 0;
102 }
103 EXPORT_SYMBOL_GPL(ipv6_mod_enabled);
104
inet6_sk_generic(struct sock * sk)105 static struct ipv6_pinfo *inet6_sk_generic(struct sock *sk)
106 {
107 const int offset = sk->sk_prot->ipv6_pinfo_offset;
108
109 return (struct ipv6_pinfo *)(((u8 *)sk) + offset);
110 }
111
inet6_sock_destruct(struct sock * sk)112 void inet6_sock_destruct(struct sock *sk)
113 {
114 inet6_cleanup_sock(sk);
115 inet_sock_destruct(sk);
116 }
117 EXPORT_SYMBOL_GPL(inet6_sock_destruct);
118
inet6_create(struct net * net,struct socket * sock,int protocol,int kern)119 static int inet6_create(struct net *net, struct socket *sock, int protocol,
120 int kern)
121 {
122 struct inet_sock *inet;
123 struct ipv6_pinfo *np;
124 struct sock *sk;
125 struct inet_protosw *answer;
126 struct proto *answer_prot;
127 unsigned char answer_flags;
128 int try_loading_module = 0;
129 int err;
130
131 if (protocol < 0 || protocol >= IPPROTO_MAX)
132 return -EINVAL;
133
134 /* Look for the requested type/protocol pair. */
135 lookup_protocol:
136 err = -ESOCKTNOSUPPORT;
137 rcu_read_lock();
138 list_for_each_entry_rcu(answer, &inetsw6[sock->type], list) {
139
140 err = 0;
141 /* Check the non-wild match. */
142 if (protocol == answer->protocol) {
143 if (protocol != IPPROTO_IP)
144 break;
145 } else {
146 /* Check for the two wild cases. */
147 if (IPPROTO_IP == protocol) {
148 protocol = answer->protocol;
149 break;
150 }
151 if (IPPROTO_IP == answer->protocol)
152 break;
153 }
154 err = -EPROTONOSUPPORT;
155 }
156
157 if (err) {
158 if (try_loading_module < 2) {
159 rcu_read_unlock();
160 /*
161 * Be more specific, e.g. net-pf-10-proto-132-type-1
162 * (net-pf-PF_INET6-proto-IPPROTO_SCTP-type-SOCK_STREAM)
163 */
164 if (++try_loading_module == 1)
165 request_module("net-pf-%d-proto-%d-type-%d",
166 PF_INET6, protocol, sock->type);
167 /*
168 * Fall back to generic, e.g. net-pf-10-proto-132
169 * (net-pf-PF_INET6-proto-IPPROTO_SCTP)
170 */
171 else
172 request_module("net-pf-%d-proto-%d",
173 PF_INET6, protocol);
174 goto lookup_protocol;
175 } else
176 goto out_rcu_unlock;
177 }
178
179 err = -EPERM;
180 if (sock->type == SOCK_RAW && !kern &&
181 !ns_capable(net->user_ns, CAP_NET_RAW))
182 goto out_rcu_unlock;
183
184 sock->ops = answer->ops;
185 answer_prot = answer->prot;
186 answer_flags = answer->flags;
187 rcu_read_unlock();
188
189 WARN_ON(!answer_prot->slab);
190
191 err = -ENOBUFS;
192 sk = sk_alloc(net, PF_INET6, GFP_KERNEL, answer_prot, kern);
193 if (!sk)
194 goto out;
195
196 sock_init_data(sock, sk);
197
198 err = 0;
199 if (INET_PROTOSW_REUSE & answer_flags)
200 sk->sk_reuse = SK_CAN_REUSE;
201
202 if (INET_PROTOSW_ICSK & answer_flags)
203 inet_init_csk_locks(sk);
204
205 inet = inet_sk(sk);
206 inet_assign_bit(IS_ICSK, sk, INET_PROTOSW_ICSK & answer_flags);
207
208 if (SOCK_RAW == sock->type) {
209 inet->inet_num = protocol;
210 if (IPPROTO_RAW == protocol)
211 inet_set_bit(HDRINCL, sk);
212 }
213
214 sk->sk_destruct = inet6_sock_destruct;
215 sk->sk_family = PF_INET6;
216 sk->sk_protocol = protocol;
217
218 sk->sk_backlog_rcv = answer->prot->backlog_rcv;
219
220 inet_sk(sk)->pinet6 = np = inet6_sk_generic(sk);
221 np->hop_limit = -1;
222 np->mcast_hops = IPV6_DEFAULT_MCASTHOPS;
223 np->mc_loop = 1;
224 np->mc_all = 1;
225 np->pmtudisc = IPV6_PMTUDISC_WANT;
226 np->repflow = net->ipv6.sysctl.flowlabel_reflect & FLOWLABEL_REFLECT_ESTABLISHED;
227 sk->sk_ipv6only = net->ipv6.sysctl.bindv6only;
228 sk->sk_txrehash = READ_ONCE(net->core.sysctl_txrehash);
229
230 /* Init the ipv4 part of the socket since we can have sockets
231 * using v6 API for ipv4.
232 */
233 inet->uc_ttl = -1;
234
235 inet_set_bit(MC_LOOP, sk);
236 inet->mc_ttl = 1;
237 inet->mc_index = 0;
238 RCU_INIT_POINTER(inet->mc_list, NULL);
239 inet->rcv_tos = 0;
240
241 if (READ_ONCE(net->ipv4.sysctl_ip_no_pmtu_disc))
242 inet->pmtudisc = IP_PMTUDISC_DONT;
243 else
244 inet->pmtudisc = IP_PMTUDISC_WANT;
245
246 if (inet->inet_num) {
247 /* It assumes that any protocol which allows
248 * the user to assign a number at socket
249 * creation time automatically shares.
250 */
251 inet->inet_sport = htons(inet->inet_num);
252 err = sk->sk_prot->hash(sk);
253 if (err)
254 goto out_sk_release;
255 }
256 if (sk->sk_prot->init) {
257 err = sk->sk_prot->init(sk);
258 if (err)
259 goto out_sk_release;
260 }
261
262 if (!kern) {
263 err = BPF_CGROUP_RUN_PROG_INET_SOCK(sk);
264 if (err)
265 goto out_sk_release;
266 }
267 out:
268 return err;
269 out_rcu_unlock:
270 rcu_read_unlock();
271 goto out;
272 out_sk_release:
273 sk_common_release(sk);
274 sock->sk = NULL;
275 goto out;
276 }
277
__inet6_bind(struct sock * sk,struct sockaddr * uaddr,int addr_len,u32 flags)278 static int __inet6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len,
279 u32 flags)
280 {
281 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)uaddr;
282 struct inet_sock *inet = inet_sk(sk);
283 struct ipv6_pinfo *np = inet6_sk(sk);
284 struct net *net = sock_net(sk);
285 __be32 v4addr = 0;
286 unsigned short snum;
287 bool saved_ipv6only;
288 int addr_type = 0;
289 int err = 0;
290
291 if (addr->sin6_family != AF_INET6)
292 return -EAFNOSUPPORT;
293
294 addr_type = ipv6_addr_type(&addr->sin6_addr);
295 if ((addr_type & IPV6_ADDR_MULTICAST) && sk->sk_type == SOCK_STREAM)
296 return -EINVAL;
297
298 snum = ntohs(addr->sin6_port);
299 if (!(flags & BIND_NO_CAP_NET_BIND_SERVICE) &&
300 snum && inet_port_requires_bind_service(net, snum) &&
301 !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE))
302 return -EACCES;
303
304 if (flags & BIND_WITH_LOCK)
305 lock_sock(sk);
306
307 /* Check these errors (active socket, double bind). */
308 if (sk->sk_state != TCP_CLOSE || inet->inet_num) {
309 err = -EINVAL;
310 goto out;
311 }
312
313 /* Check if the address belongs to the host. */
314 if (addr_type == IPV6_ADDR_MAPPED) {
315 struct net_device *dev = NULL;
316 int chk_addr_ret;
317
318 /* Binding to v4-mapped address on a v6-only socket
319 * makes no sense
320 */
321 if (ipv6_only_sock(sk)) {
322 err = -EINVAL;
323 goto out;
324 }
325
326 rcu_read_lock();
327 if (sk->sk_bound_dev_if) {
328 dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if);
329 if (!dev) {
330 err = -ENODEV;
331 goto out_unlock;
332 }
333 }
334
335 /* Reproduce AF_INET checks to make the bindings consistent */
336 v4addr = addr->sin6_addr.s6_addr32[3];
337 chk_addr_ret = inet_addr_type_dev_table(net, dev, v4addr);
338 rcu_read_unlock();
339
340 if (!inet_addr_valid_or_nonlocal(net, inet, v4addr,
341 chk_addr_ret)) {
342 err = -EADDRNOTAVAIL;
343 goto out;
344 }
345 } else {
346 if (addr_type != IPV6_ADDR_ANY) {
347 struct net_device *dev = NULL;
348
349 rcu_read_lock();
350 if (__ipv6_addr_needs_scope_id(addr_type)) {
351 if (addr_len >= sizeof(struct sockaddr_in6) &&
352 addr->sin6_scope_id) {
353 /* Override any existing binding, if another one
354 * is supplied by user.
355 */
356 sk->sk_bound_dev_if = addr->sin6_scope_id;
357 }
358
359 /* Binding to link-local address requires an interface */
360 if (!sk->sk_bound_dev_if) {
361 err = -EINVAL;
362 goto out_unlock;
363 }
364 }
365
366 if (sk->sk_bound_dev_if) {
367 dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if);
368 if (!dev) {
369 err = -ENODEV;
370 goto out_unlock;
371 }
372 }
373
374 /* ipv4 addr of the socket is invalid. Only the
375 * unspecified and mapped address have a v4 equivalent.
376 */
377 v4addr = LOOPBACK4_IPV6;
378 if (!(addr_type & IPV6_ADDR_MULTICAST)) {
379 if (!ipv6_can_nonlocal_bind(net, inet) &&
380 !ipv6_chk_addr(net, &addr->sin6_addr,
381 dev, 0)) {
382 err = -EADDRNOTAVAIL;
383 goto out_unlock;
384 }
385 }
386 rcu_read_unlock();
387 }
388 }
389
390 inet->inet_rcv_saddr = v4addr;
391 inet->inet_saddr = v4addr;
392
393 sk->sk_v6_rcv_saddr = addr->sin6_addr;
394
395 if (!(addr_type & IPV6_ADDR_MULTICAST))
396 np->saddr = addr->sin6_addr;
397
398 saved_ipv6only = sk->sk_ipv6only;
399 if (addr_type != IPV6_ADDR_ANY && addr_type != IPV6_ADDR_MAPPED)
400 sk->sk_ipv6only = 1;
401
402 /* Make sure we are allowed to bind here. */
403 if (snum || !(inet_test_bit(BIND_ADDRESS_NO_PORT, sk) ||
404 (flags & BIND_FORCE_ADDRESS_NO_PORT))) {
405 err = sk->sk_prot->get_port(sk, snum);
406 if (err) {
407 sk->sk_ipv6only = saved_ipv6only;
408 inet_reset_saddr(sk);
409 goto out;
410 }
411 if (!(flags & BIND_FROM_BPF)) {
412 err = BPF_CGROUP_RUN_PROG_INET6_POST_BIND(sk);
413 if (err) {
414 sk->sk_ipv6only = saved_ipv6only;
415 inet_reset_saddr(sk);
416 if (sk->sk_prot->put_port)
417 sk->sk_prot->put_port(sk);
418 goto out;
419 }
420 }
421 }
422
423 if (addr_type != IPV6_ADDR_ANY)
424 sk->sk_userlocks |= SOCK_BINDADDR_LOCK;
425 if (snum)
426 sk->sk_userlocks |= SOCK_BINDPORT_LOCK;
427 inet->inet_sport = htons(inet->inet_num);
428 inet->inet_dport = 0;
429 inet->inet_daddr = 0;
430 out:
431 if (flags & BIND_WITH_LOCK)
432 release_sock(sk);
433 return err;
434 out_unlock:
435 rcu_read_unlock();
436 goto out;
437 }
438
inet6_bind_sk(struct sock * sk,struct sockaddr * uaddr,int addr_len)439 int inet6_bind_sk(struct sock *sk, struct sockaddr *uaddr, int addr_len)
440 {
441 u32 flags = BIND_WITH_LOCK;
442 const struct proto *prot;
443 int err = 0;
444
445 /* IPV6_ADDRFORM can change sk->sk_prot under us. */
446 prot = READ_ONCE(sk->sk_prot);
447 /* If the socket has its own bind function then use it. */
448 if (prot->bind)
449 return prot->bind(sk, uaddr, addr_len);
450
451 if (addr_len < SIN6_LEN_RFC2133)
452 return -EINVAL;
453
454 /* BPF prog is run before any checks are done so that if the prog
455 * changes context in a wrong way it will be caught.
456 */
457 err = BPF_CGROUP_RUN_PROG_INET_BIND_LOCK(sk, uaddr, &addr_len,
458 CGROUP_INET6_BIND, &flags);
459 if (err)
460 return err;
461
462 return __inet6_bind(sk, uaddr, addr_len, flags);
463 }
464
465 /* bind for INET6 API */
inet6_bind(struct socket * sock,struct sockaddr * uaddr,int addr_len)466 int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
467 {
468 return inet6_bind_sk(sock->sk, uaddr, addr_len);
469 }
470 EXPORT_SYMBOL(inet6_bind);
471
inet6_release(struct socket * sock)472 int inet6_release(struct socket *sock)
473 {
474 struct sock *sk = sock->sk;
475
476 if (!sk)
477 return -EINVAL;
478
479 /* Free mc lists */
480 ipv6_sock_mc_close(sk);
481
482 /* Free ac lists */
483 ipv6_sock_ac_close(sk);
484
485 return inet_release(sock);
486 }
487 EXPORT_SYMBOL(inet6_release);
488
inet6_cleanup_sock(struct sock * sk)489 void inet6_cleanup_sock(struct sock *sk)
490 {
491 struct ipv6_pinfo *np = inet6_sk(sk);
492 struct sk_buff *skb;
493 struct ipv6_txoptions *opt;
494
495 /* Release rx options */
496
497 skb = xchg(&np->pktoptions, NULL);
498 kfree_skb(skb);
499
500 skb = xchg(&np->rxpmtu, NULL);
501 kfree_skb(skb);
502
503 /* Free flowlabels */
504 fl6_free_socklist(sk);
505
506 /* Free tx options */
507
508 opt = unrcu_pointer(xchg(&np->opt, NULL));
509 if (opt) {
510 atomic_sub(opt->tot_len, &sk->sk_omem_alloc);
511 txopt_put(opt);
512 }
513 }
514 EXPORT_SYMBOL_GPL(inet6_cleanup_sock);
515
516 /*
517 * This does both peername and sockname.
518 */
inet6_getname(struct socket * sock,struct sockaddr * uaddr,int peer)519 int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
520 int peer)
521 {
522 struct sockaddr_in6 *sin = (struct sockaddr_in6 *)uaddr;
523 int sin_addr_len = sizeof(*sin);
524 struct sock *sk = sock->sk;
525 struct inet_sock *inet = inet_sk(sk);
526 struct ipv6_pinfo *np = inet6_sk(sk);
527
528 sin->sin6_family = AF_INET6;
529 sin->sin6_flowinfo = 0;
530 sin->sin6_scope_id = 0;
531 lock_sock(sk);
532 if (peer) {
533 if (!inet->inet_dport ||
534 (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) &&
535 peer == 1)) {
536 release_sock(sk);
537 return -ENOTCONN;
538 }
539 sin->sin6_port = inet->inet_dport;
540 sin->sin6_addr = sk->sk_v6_daddr;
541 if (np->sndflow)
542 sin->sin6_flowinfo = np->flow_label;
543 BPF_CGROUP_RUN_SA_PROG(sk, (struct sockaddr *)sin, &sin_addr_len,
544 CGROUP_INET6_GETPEERNAME);
545 } else {
546 if (ipv6_addr_any(&sk->sk_v6_rcv_saddr))
547 sin->sin6_addr = np->saddr;
548 else
549 sin->sin6_addr = sk->sk_v6_rcv_saddr;
550 sin->sin6_port = inet->inet_sport;
551 BPF_CGROUP_RUN_SA_PROG(sk, (struct sockaddr *)sin, &sin_addr_len,
552 CGROUP_INET6_GETSOCKNAME);
553 }
554 sin->sin6_scope_id = ipv6_iface_scope_id(&sin->sin6_addr,
555 sk->sk_bound_dev_if);
556 release_sock(sk);
557 return sin_addr_len;
558 }
559 EXPORT_SYMBOL(inet6_getname);
560
inet6_ioctl(struct socket * sock,unsigned int cmd,unsigned long arg)561 int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
562 {
563 void __user *argp = (void __user *)arg;
564 struct sock *sk = sock->sk;
565 struct net *net = sock_net(sk);
566 const struct proto *prot;
567
568 switch (cmd) {
569 case SIOCADDRT:
570 case SIOCDELRT: {
571 struct in6_rtmsg rtmsg;
572
573 if (copy_from_user(&rtmsg, argp, sizeof(rtmsg)))
574 return -EFAULT;
575 return ipv6_route_ioctl(net, cmd, &rtmsg);
576 }
577 case SIOCSIFADDR:
578 return addrconf_add_ifaddr(net, argp);
579 case SIOCDIFADDR:
580 return addrconf_del_ifaddr(net, argp);
581 case SIOCSIFDSTADDR:
582 return addrconf_set_dstaddr(net, argp);
583 default:
584 /* IPV6_ADDRFORM can change sk->sk_prot under us. */
585 prot = READ_ONCE(sk->sk_prot);
586 if (!prot->ioctl)
587 return -ENOIOCTLCMD;
588 return sk_ioctl(sk, cmd, (void __user *)arg);
589 }
590 /*NOTREACHED*/
591 return 0;
592 }
593 EXPORT_SYMBOL(inet6_ioctl);
594
595 #ifdef CONFIG_COMPAT
596 struct compat_in6_rtmsg {
597 struct in6_addr rtmsg_dst;
598 struct in6_addr rtmsg_src;
599 struct in6_addr rtmsg_gateway;
600 u32 rtmsg_type;
601 u16 rtmsg_dst_len;
602 u16 rtmsg_src_len;
603 u32 rtmsg_metric;
604 u32 rtmsg_info;
605 u32 rtmsg_flags;
606 s32 rtmsg_ifindex;
607 };
608
inet6_compat_routing_ioctl(struct sock * sk,unsigned int cmd,struct compat_in6_rtmsg __user * ur)609 static int inet6_compat_routing_ioctl(struct sock *sk, unsigned int cmd,
610 struct compat_in6_rtmsg __user *ur)
611 {
612 struct in6_rtmsg rt;
613
614 if (copy_from_user(&rt.rtmsg_dst, &ur->rtmsg_dst,
615 3 * sizeof(struct in6_addr)) ||
616 get_user(rt.rtmsg_type, &ur->rtmsg_type) ||
617 get_user(rt.rtmsg_dst_len, &ur->rtmsg_dst_len) ||
618 get_user(rt.rtmsg_src_len, &ur->rtmsg_src_len) ||
619 get_user(rt.rtmsg_metric, &ur->rtmsg_metric) ||
620 get_user(rt.rtmsg_info, &ur->rtmsg_info) ||
621 get_user(rt.rtmsg_flags, &ur->rtmsg_flags) ||
622 get_user(rt.rtmsg_ifindex, &ur->rtmsg_ifindex))
623 return -EFAULT;
624
625
626 return ipv6_route_ioctl(sock_net(sk), cmd, &rt);
627 }
628
inet6_compat_ioctl(struct socket * sock,unsigned int cmd,unsigned long arg)629 int inet6_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
630 {
631 void __user *argp = compat_ptr(arg);
632 struct sock *sk = sock->sk;
633
634 switch (cmd) {
635 case SIOCADDRT:
636 case SIOCDELRT:
637 return inet6_compat_routing_ioctl(sk, cmd, argp);
638 default:
639 return -ENOIOCTLCMD;
640 }
641 }
642 EXPORT_SYMBOL_GPL(inet6_compat_ioctl);
643 #endif /* CONFIG_COMPAT */
644
645 INDIRECT_CALLABLE_DECLARE(int udpv6_sendmsg(struct sock *, struct msghdr *,
646 size_t));
inet6_sendmsg(struct socket * sock,struct msghdr * msg,size_t size)647 int inet6_sendmsg(struct socket *sock, struct msghdr *msg, size_t size)
648 {
649 struct sock *sk = sock->sk;
650 const struct proto *prot;
651
652 if (unlikely(inet_send_prepare(sk)))
653 return -EAGAIN;
654
655 /* IPV6_ADDRFORM can change sk->sk_prot under us. */
656 prot = READ_ONCE(sk->sk_prot);
657 return INDIRECT_CALL_2(prot->sendmsg, tcp_sendmsg, udpv6_sendmsg,
658 sk, msg, size);
659 }
660
661 INDIRECT_CALLABLE_DECLARE(int udpv6_recvmsg(struct sock *, struct msghdr *,
662 size_t, int, int *));
inet6_recvmsg(struct socket * sock,struct msghdr * msg,size_t size,int flags)663 int inet6_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
664 int flags)
665 {
666 struct sock *sk = sock->sk;
667 const struct proto *prot;
668 int addr_len = 0;
669 int err;
670
671 if (likely(!(flags & MSG_ERRQUEUE)))
672 sock_rps_record_flow(sk);
673
674 /* IPV6_ADDRFORM can change sk->sk_prot under us. */
675 prot = READ_ONCE(sk->sk_prot);
676 err = INDIRECT_CALL_2(prot->recvmsg, tcp_recvmsg, udpv6_recvmsg,
677 sk, msg, size, flags, &addr_len);
678 if (err >= 0)
679 msg->msg_namelen = addr_len;
680 return err;
681 }
682
683 const struct proto_ops inet6_stream_ops = {
684 .family = PF_INET6,
685 .owner = THIS_MODULE,
686 .release = inet6_release,
687 .bind = inet6_bind,
688 .connect = inet_stream_connect, /* ok */
689 .socketpair = sock_no_socketpair, /* a do nothing */
690 .accept = inet_accept, /* ok */
691 .getname = inet6_getname,
692 .poll = tcp_poll, /* ok */
693 .ioctl = inet6_ioctl, /* must change */
694 .gettstamp = sock_gettstamp,
695 .listen = inet_listen, /* ok */
696 .shutdown = inet_shutdown, /* ok */
697 .setsockopt = sock_common_setsockopt, /* ok */
698 .getsockopt = sock_common_getsockopt, /* ok */
699 .sendmsg = inet6_sendmsg, /* retpoline's sake */
700 .recvmsg = inet6_recvmsg, /* retpoline's sake */
701 #ifdef CONFIG_MMU
702 .mmap = tcp_mmap,
703 #endif
704 .splice_eof = inet_splice_eof,
705 .sendmsg_locked = tcp_sendmsg_locked,
706 .splice_read = tcp_splice_read,
707 .read_sock = tcp_read_sock,
708 .read_skb = tcp_read_skb,
709 .peek_len = tcp_peek_len,
710 #ifdef CONFIG_COMPAT
711 .compat_ioctl = inet6_compat_ioctl,
712 #endif
713 .set_rcvlowat = tcp_set_rcvlowat,
714 };
715
716 const struct proto_ops inet6_dgram_ops = {
717 .family = PF_INET6,
718 .owner = THIS_MODULE,
719 .release = inet6_release,
720 .bind = inet6_bind,
721 .connect = inet_dgram_connect, /* ok */
722 .socketpair = sock_no_socketpair, /* a do nothing */
723 .accept = sock_no_accept, /* a do nothing */
724 .getname = inet6_getname,
725 .poll = udp_poll, /* ok */
726 .ioctl = inet6_ioctl, /* must change */
727 .gettstamp = sock_gettstamp,
728 .listen = sock_no_listen, /* ok */
729 .shutdown = inet_shutdown, /* ok */
730 .setsockopt = sock_common_setsockopt, /* ok */
731 .getsockopt = sock_common_getsockopt, /* ok */
732 .sendmsg = inet6_sendmsg, /* retpoline's sake */
733 .recvmsg = inet6_recvmsg, /* retpoline's sake */
734 .read_skb = udp_read_skb,
735 .mmap = sock_no_mmap,
736 .set_peek_off = sk_set_peek_off,
737 #ifdef CONFIG_COMPAT
738 .compat_ioctl = inet6_compat_ioctl,
739 #endif
740 };
741
742 static const struct net_proto_family inet6_family_ops = {
743 .family = PF_INET6,
744 .create = inet6_create,
745 .owner = THIS_MODULE,
746 };
747
inet6_register_protosw(struct inet_protosw * p)748 int inet6_register_protosw(struct inet_protosw *p)
749 {
750 struct list_head *lh;
751 struct inet_protosw *answer;
752 struct list_head *last_perm;
753 int protocol = p->protocol;
754 int ret;
755
756 spin_lock_bh(&inetsw6_lock);
757
758 ret = -EINVAL;
759 if (p->type >= SOCK_MAX)
760 goto out_illegal;
761
762 /* If we are trying to override a permanent protocol, bail. */
763 answer = NULL;
764 ret = -EPERM;
765 last_perm = &inetsw6[p->type];
766 list_for_each(lh, &inetsw6[p->type]) {
767 answer = list_entry(lh, struct inet_protosw, list);
768
769 /* Check only the non-wild match. */
770 if (INET_PROTOSW_PERMANENT & answer->flags) {
771 if (protocol == answer->protocol)
772 break;
773 last_perm = lh;
774 }
775
776 answer = NULL;
777 }
778 if (answer)
779 goto out_permanent;
780
781 /* Add the new entry after the last permanent entry if any, so that
782 * the new entry does not override a permanent entry when matched with
783 * a wild-card protocol. But it is allowed to override any existing
784 * non-permanent entry. This means that when we remove this entry, the
785 * system automatically returns to the old behavior.
786 */
787 list_add_rcu(&p->list, last_perm);
788 ret = 0;
789 out:
790 spin_unlock_bh(&inetsw6_lock);
791 return ret;
792
793 out_permanent:
794 pr_err("Attempt to override permanent protocol %d\n", protocol);
795 goto out;
796
797 out_illegal:
798 pr_err("Ignoring attempt to register invalid socket type %d\n",
799 p->type);
800 goto out;
801 }
802 EXPORT_SYMBOL(inet6_register_protosw);
803
804 void
inet6_unregister_protosw(struct inet_protosw * p)805 inet6_unregister_protosw(struct inet_protosw *p)
806 {
807 if (INET_PROTOSW_PERMANENT & p->flags) {
808 pr_err("Attempt to unregister permanent protocol %d\n",
809 p->protocol);
810 } else {
811 spin_lock_bh(&inetsw6_lock);
812 list_del_rcu(&p->list);
813 spin_unlock_bh(&inetsw6_lock);
814
815 synchronize_net();
816 }
817 }
818 EXPORT_SYMBOL(inet6_unregister_protosw);
819
inet6_sk_rebuild_header(struct sock * sk)820 int inet6_sk_rebuild_header(struct sock *sk)
821 {
822 struct ipv6_pinfo *np = inet6_sk(sk);
823 struct dst_entry *dst;
824
825 dst = __sk_dst_check(sk, np->dst_cookie);
826
827 if (!dst) {
828 struct inet_sock *inet = inet_sk(sk);
829 struct in6_addr *final_p, final;
830 struct flowi6 fl6;
831
832 memset(&fl6, 0, sizeof(fl6));
833 fl6.flowi6_proto = sk->sk_protocol;
834 fl6.daddr = sk->sk_v6_daddr;
835 fl6.saddr = np->saddr;
836 fl6.flowlabel = np->flow_label;
837 fl6.flowi6_oif = sk->sk_bound_dev_if;
838 fl6.flowi6_mark = sk->sk_mark;
839 fl6.fl6_dport = inet->inet_dport;
840 fl6.fl6_sport = inet->inet_sport;
841 fl6.flowi6_uid = sk->sk_uid;
842 security_sk_classify_flow(sk, flowi6_to_flowi_common(&fl6));
843
844 rcu_read_lock();
845 final_p = fl6_update_dst(&fl6, rcu_dereference(np->opt),
846 &final);
847 rcu_read_unlock();
848
849 dst = ip6_dst_lookup_flow(sock_net(sk), sk, &fl6, final_p);
850 if (IS_ERR(dst)) {
851 sk->sk_route_caps = 0;
852 WRITE_ONCE(sk->sk_err_soft, -PTR_ERR(dst));
853 return PTR_ERR(dst);
854 }
855
856 ip6_dst_store(sk, dst, NULL, NULL);
857 }
858
859 return 0;
860 }
861 EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header);
862
ipv6_opt_accepted(const struct sock * sk,const struct sk_buff * skb,const struct inet6_skb_parm * opt)863 bool ipv6_opt_accepted(const struct sock *sk, const struct sk_buff *skb,
864 const struct inet6_skb_parm *opt)
865 {
866 const struct ipv6_pinfo *np = inet6_sk(sk);
867
868 if (np->rxopt.all) {
869 if (((opt->flags & IP6SKB_HOPBYHOP) &&
870 (np->rxopt.bits.hopopts || np->rxopt.bits.ohopopts)) ||
871 (ip6_flowinfo((struct ipv6hdr *) skb_network_header(skb)) &&
872 np->rxopt.bits.rxflow) ||
873 (opt->srcrt && (np->rxopt.bits.srcrt ||
874 np->rxopt.bits.osrcrt)) ||
875 ((opt->dst1 || opt->dst0) &&
876 (np->rxopt.bits.dstopts || np->rxopt.bits.odstopts)))
877 return true;
878 }
879 return false;
880 }
881 EXPORT_SYMBOL_GPL(ipv6_opt_accepted);
882
883 static struct packet_type ipv6_packet_type __read_mostly = {
884 .type = cpu_to_be16(ETH_P_IPV6),
885 .func = ipv6_rcv,
886 .list_func = ipv6_list_rcv,
887 };
888
ipv6_packet_init(void)889 static int __init ipv6_packet_init(void)
890 {
891 dev_add_pack(&ipv6_packet_type);
892 return 0;
893 }
894
ipv6_packet_cleanup(void)895 static void ipv6_packet_cleanup(void)
896 {
897 dev_remove_pack(&ipv6_packet_type);
898 }
899
ipv6_init_mibs(struct net * net)900 static int __net_init ipv6_init_mibs(struct net *net)
901 {
902 int i;
903
904 net->mib.udp_stats_in6 = alloc_percpu(struct udp_mib);
905 if (!net->mib.udp_stats_in6)
906 return -ENOMEM;
907 net->mib.udplite_stats_in6 = alloc_percpu(struct udp_mib);
908 if (!net->mib.udplite_stats_in6)
909 goto err_udplite_mib;
910 net->mib.ipv6_statistics = alloc_percpu(struct ipstats_mib);
911 if (!net->mib.ipv6_statistics)
912 goto err_ip_mib;
913
914 for_each_possible_cpu(i) {
915 struct ipstats_mib *af_inet6_stats;
916 af_inet6_stats = per_cpu_ptr(net->mib.ipv6_statistics, i);
917 u64_stats_init(&af_inet6_stats->syncp);
918 }
919
920
921 net->mib.icmpv6_statistics = alloc_percpu(struct icmpv6_mib);
922 if (!net->mib.icmpv6_statistics)
923 goto err_icmp_mib;
924 net->mib.icmpv6msg_statistics = kzalloc(sizeof(struct icmpv6msg_mib),
925 GFP_KERNEL);
926 if (!net->mib.icmpv6msg_statistics)
927 goto err_icmpmsg_mib;
928 return 0;
929
930 err_icmpmsg_mib:
931 free_percpu(net->mib.icmpv6_statistics);
932 err_icmp_mib:
933 free_percpu(net->mib.ipv6_statistics);
934 err_ip_mib:
935 free_percpu(net->mib.udplite_stats_in6);
936 err_udplite_mib:
937 free_percpu(net->mib.udp_stats_in6);
938 return -ENOMEM;
939 }
940
ipv6_cleanup_mibs(struct net * net)941 static void ipv6_cleanup_mibs(struct net *net)
942 {
943 free_percpu(net->mib.udp_stats_in6);
944 free_percpu(net->mib.udplite_stats_in6);
945 free_percpu(net->mib.ipv6_statistics);
946 free_percpu(net->mib.icmpv6_statistics);
947 kfree(net->mib.icmpv6msg_statistics);
948 }
949
inet6_net_init(struct net * net)950 static int __net_init inet6_net_init(struct net *net)
951 {
952 int err = 0;
953
954 net->ipv6.sysctl.bindv6only = 0;
955 net->ipv6.sysctl.icmpv6_time = 1*HZ;
956 net->ipv6.sysctl.icmpv6_echo_ignore_all = 0;
957 net->ipv6.sysctl.icmpv6_echo_ignore_multicast = 0;
958 net->ipv6.sysctl.icmpv6_echo_ignore_anycast = 0;
959 net->ipv6.sysctl.icmpv6_error_anycast_as_unicast = 0;
960
961 /* By default, rate limit error messages.
962 * Except for pmtu discovery, it would break it.
963 * proc_do_large_bitmap needs pointer to the bitmap.
964 */
965 bitmap_set(net->ipv6.sysctl.icmpv6_ratemask, 0, ICMPV6_ERRMSG_MAX + 1);
966 bitmap_clear(net->ipv6.sysctl.icmpv6_ratemask, ICMPV6_PKT_TOOBIG, 1);
967 net->ipv6.sysctl.icmpv6_ratemask_ptr = net->ipv6.sysctl.icmpv6_ratemask;
968
969 net->ipv6.sysctl.flowlabel_consistency = 1;
970 net->ipv6.sysctl.auto_flowlabels = IP6_DEFAULT_AUTO_FLOW_LABELS;
971 net->ipv6.sysctl.idgen_retries = 3;
972 net->ipv6.sysctl.idgen_delay = 1 * HZ;
973 net->ipv6.sysctl.flowlabel_state_ranges = 0;
974 net->ipv6.sysctl.max_dst_opts_cnt = IP6_DEFAULT_MAX_DST_OPTS_CNT;
975 net->ipv6.sysctl.max_hbh_opts_cnt = IP6_DEFAULT_MAX_HBH_OPTS_CNT;
976 net->ipv6.sysctl.max_dst_opts_len = IP6_DEFAULT_MAX_DST_OPTS_LEN;
977 net->ipv6.sysctl.max_hbh_opts_len = IP6_DEFAULT_MAX_HBH_OPTS_LEN;
978 net->ipv6.sysctl.fib_notify_on_flag_change = 0;
979 atomic_set(&net->ipv6.fib6_sernum, 1);
980
981 net->ipv6.sysctl.ioam6_id = IOAM6_DEFAULT_ID;
982 net->ipv6.sysctl.ioam6_id_wide = IOAM6_DEFAULT_ID_WIDE;
983
984 err = ipv6_init_mibs(net);
985 if (err)
986 return err;
987 #ifdef CONFIG_PROC_FS
988 err = udp6_proc_init(net);
989 if (err)
990 goto out;
991 err = tcp6_proc_init(net);
992 if (err)
993 goto proc_tcp6_fail;
994 err = ac6_proc_init(net);
995 if (err)
996 goto proc_ac6_fail;
997 #endif
998 return err;
999
1000 #ifdef CONFIG_PROC_FS
1001 proc_ac6_fail:
1002 tcp6_proc_exit(net);
1003 proc_tcp6_fail:
1004 udp6_proc_exit(net);
1005 out:
1006 ipv6_cleanup_mibs(net);
1007 return err;
1008 #endif
1009 }
1010
inet6_net_exit(struct net * net)1011 static void __net_exit inet6_net_exit(struct net *net)
1012 {
1013 #ifdef CONFIG_PROC_FS
1014 udp6_proc_exit(net);
1015 tcp6_proc_exit(net);
1016 ac6_proc_exit(net);
1017 #endif
1018 ipv6_cleanup_mibs(net);
1019 }
1020
1021 static struct pernet_operations inet6_net_ops = {
1022 .init = inet6_net_init,
1023 .exit = inet6_net_exit,
1024 };
1025
ipv6_route_input(struct sk_buff * skb)1026 static int ipv6_route_input(struct sk_buff *skb)
1027 {
1028 ip6_route_input(skb);
1029 return skb_dst(skb)->error;
1030 }
1031
1032 static const struct ipv6_stub ipv6_stub_impl = {
1033 .ipv6_sock_mc_join = ipv6_sock_mc_join,
1034 .ipv6_sock_mc_drop = ipv6_sock_mc_drop,
1035 .ipv6_dst_lookup_flow = ip6_dst_lookup_flow,
1036 .ipv6_route_input = ipv6_route_input,
1037 .fib6_get_table = fib6_get_table,
1038 .fib6_table_lookup = fib6_table_lookup,
1039 .fib6_lookup = fib6_lookup,
1040 .fib6_select_path = fib6_select_path,
1041 .ip6_mtu_from_fib6 = ip6_mtu_from_fib6,
1042 .fib6_nh_init = fib6_nh_init,
1043 .fib6_nh_release = fib6_nh_release,
1044 .fib6_nh_release_dsts = fib6_nh_release_dsts,
1045 .fib6_update_sernum = fib6_update_sernum_stub,
1046 .fib6_rt_update = fib6_rt_update,
1047 .ip6_del_rt = ip6_del_rt,
1048 .udpv6_encap_enable = udpv6_encap_enable,
1049 .ndisc_send_na = ndisc_send_na,
1050 #if IS_ENABLED(CONFIG_XFRM)
1051 .xfrm6_local_rxpmtu = xfrm6_local_rxpmtu,
1052 .xfrm6_udp_encap_rcv = xfrm6_udp_encap_rcv,
1053 .xfrm6_rcv_encap = xfrm6_rcv_encap,
1054 #endif
1055 .nd_tbl = &nd_tbl,
1056 .ipv6_fragment = ip6_fragment,
1057 .ipv6_dev_find = ipv6_dev_find,
1058 };
1059
1060 static const struct ipv6_bpf_stub ipv6_bpf_stub_impl = {
1061 .inet6_bind = __inet6_bind,
1062 .udp6_lib_lookup = __udp6_lib_lookup,
1063 .ipv6_setsockopt = do_ipv6_setsockopt,
1064 .ipv6_getsockopt = do_ipv6_getsockopt,
1065 .ipv6_dev_get_saddr = ipv6_dev_get_saddr,
1066 };
1067
inet6_init(void)1068 static int __init inet6_init(void)
1069 {
1070 struct list_head *r;
1071 int err = 0;
1072
1073 sock_skb_cb_check_size(sizeof(struct inet6_skb_parm));
1074
1075 /* Register the socket-side information for inet6_create. */
1076 for (r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r)
1077 INIT_LIST_HEAD(r);
1078
1079 raw_hashinfo_init(&raw_v6_hashinfo);
1080
1081 if (disable_ipv6_mod) {
1082 pr_info("Loaded, but administratively disabled, reboot required to enable\n");
1083 goto out;
1084 }
1085
1086 err = proto_register(&tcpv6_prot, 1);
1087 if (err)
1088 goto out;
1089
1090 err = proto_register(&udpv6_prot, 1);
1091 if (err)
1092 goto out_unregister_tcp_proto;
1093
1094 err = proto_register(&udplitev6_prot, 1);
1095 if (err)
1096 goto out_unregister_udp_proto;
1097
1098 err = proto_register(&rawv6_prot, 1);
1099 if (err)
1100 goto out_unregister_udplite_proto;
1101
1102 err = proto_register(&pingv6_prot, 1);
1103 if (err)
1104 goto out_unregister_raw_proto;
1105
1106 /* We MUST register RAW sockets before we create the ICMP6,
1107 * IGMP6, or NDISC control sockets.
1108 */
1109 err = rawv6_init();
1110 if (err)
1111 goto out_unregister_ping_proto;
1112
1113 /* Register the family here so that the init calls below will
1114 * be able to create sockets. (?? is this dangerous ??)
1115 */
1116 err = sock_register(&inet6_family_ops);
1117 if (err)
1118 goto out_sock_register_fail;
1119
1120 /*
1121 * ipngwg API draft makes clear that the correct semantics
1122 * for TCP and UDP is to consider one TCP and UDP instance
1123 * in a host available by both INET and INET6 APIs and
1124 * able to communicate via both network protocols.
1125 */
1126
1127 err = register_pernet_subsys(&inet6_net_ops);
1128 if (err)
1129 goto register_pernet_fail;
1130 err = ip6_mr_init();
1131 if (err)
1132 goto ipmr_fail;
1133 err = icmpv6_init();
1134 if (err)
1135 goto icmp_fail;
1136 err = ndisc_init();
1137 if (err)
1138 goto ndisc_fail;
1139 err = igmp6_init();
1140 if (err)
1141 goto igmp_fail;
1142
1143 err = ipv6_netfilter_init();
1144 if (err)
1145 goto netfilter_fail;
1146 /* Create /proc/foo6 entries. */
1147 #ifdef CONFIG_PROC_FS
1148 err = -ENOMEM;
1149 if (raw6_proc_init())
1150 goto proc_raw6_fail;
1151 if (udplite6_proc_init())
1152 goto proc_udplite6_fail;
1153 if (ipv6_misc_proc_init())
1154 goto proc_misc6_fail;
1155 if (if6_proc_init())
1156 goto proc_if6_fail;
1157 #endif
1158 err = ip6_route_init();
1159 if (err)
1160 goto ip6_route_fail;
1161 err = ndisc_late_init();
1162 if (err)
1163 goto ndisc_late_fail;
1164 err = ip6_flowlabel_init();
1165 if (err)
1166 goto ip6_flowlabel_fail;
1167 err = ipv6_anycast_init();
1168 if (err)
1169 goto ipv6_anycast_fail;
1170 err = addrconf_init();
1171 if (err)
1172 goto addrconf_fail;
1173
1174 /* Init v6 extension headers. */
1175 err = ipv6_exthdrs_init();
1176 if (err)
1177 goto ipv6_exthdrs_fail;
1178
1179 err = ipv6_frag_init();
1180 if (err)
1181 goto ipv6_frag_fail;
1182
1183 /* Init v6 transport protocols. */
1184 err = udpv6_init();
1185 if (err)
1186 goto udpv6_fail;
1187
1188 err = udplitev6_init();
1189 if (err)
1190 goto udplitev6_fail;
1191
1192 err = udpv6_offload_init();
1193 if (err)
1194 goto udpv6_offload_fail;
1195
1196 err = tcpv6_init();
1197 if (err)
1198 goto tcpv6_fail;
1199
1200 err = ipv6_packet_init();
1201 if (err)
1202 goto ipv6_packet_fail;
1203
1204 err = pingv6_init();
1205 if (err)
1206 goto pingv6_fail;
1207
1208 err = calipso_init();
1209 if (err)
1210 goto calipso_fail;
1211
1212 err = seg6_init();
1213 if (err)
1214 goto seg6_fail;
1215
1216 err = rpl_init();
1217 if (err)
1218 goto rpl_fail;
1219
1220 err = ioam6_init();
1221 if (err)
1222 goto ioam6_fail;
1223
1224 err = igmp6_late_init();
1225 if (err)
1226 goto igmp6_late_err;
1227
1228 #ifdef CONFIG_SYSCTL
1229 err = ipv6_sysctl_register();
1230 if (err)
1231 goto sysctl_fail;
1232 #endif
1233
1234 /* ensure that ipv6 stubs are visible only after ipv6 is ready */
1235 wmb();
1236 ipv6_stub = &ipv6_stub_impl;
1237 ipv6_bpf_stub = &ipv6_bpf_stub_impl;
1238 out:
1239 return err;
1240
1241 #ifdef CONFIG_SYSCTL
1242 sysctl_fail:
1243 igmp6_late_cleanup();
1244 #endif
1245 igmp6_late_err:
1246 ioam6_exit();
1247 ioam6_fail:
1248 rpl_exit();
1249 rpl_fail:
1250 seg6_exit();
1251 seg6_fail:
1252 calipso_exit();
1253 calipso_fail:
1254 pingv6_exit();
1255 pingv6_fail:
1256 ipv6_packet_cleanup();
1257 ipv6_packet_fail:
1258 tcpv6_exit();
1259 tcpv6_fail:
1260 udpv6_offload_exit();
1261 udpv6_offload_fail:
1262 udplitev6_exit();
1263 udplitev6_fail:
1264 udpv6_exit();
1265 udpv6_fail:
1266 ipv6_frag_exit();
1267 ipv6_frag_fail:
1268 ipv6_exthdrs_exit();
1269 ipv6_exthdrs_fail:
1270 addrconf_cleanup();
1271 addrconf_fail:
1272 ipv6_anycast_cleanup();
1273 ipv6_anycast_fail:
1274 ip6_flowlabel_cleanup();
1275 ip6_flowlabel_fail:
1276 ndisc_late_cleanup();
1277 ndisc_late_fail:
1278 ip6_route_cleanup();
1279 ip6_route_fail:
1280 #ifdef CONFIG_PROC_FS
1281 if6_proc_exit();
1282 proc_if6_fail:
1283 ipv6_misc_proc_exit();
1284 proc_misc6_fail:
1285 udplite6_proc_exit();
1286 proc_udplite6_fail:
1287 raw6_proc_exit();
1288 proc_raw6_fail:
1289 #endif
1290 ipv6_netfilter_fini();
1291 netfilter_fail:
1292 igmp6_cleanup();
1293 igmp_fail:
1294 ndisc_cleanup();
1295 ndisc_fail:
1296 icmpv6_cleanup();
1297 icmp_fail:
1298 ip6_mr_cleanup();
1299 ipmr_fail:
1300 unregister_pernet_subsys(&inet6_net_ops);
1301 register_pernet_fail:
1302 sock_unregister(PF_INET6);
1303 rtnl_unregister_all(PF_INET6);
1304 out_sock_register_fail:
1305 rawv6_exit();
1306 out_unregister_ping_proto:
1307 proto_unregister(&pingv6_prot);
1308 out_unregister_raw_proto:
1309 proto_unregister(&rawv6_prot);
1310 out_unregister_udplite_proto:
1311 proto_unregister(&udplitev6_prot);
1312 out_unregister_udp_proto:
1313 proto_unregister(&udpv6_prot);
1314 out_unregister_tcp_proto:
1315 proto_unregister(&tcpv6_prot);
1316 goto out;
1317 }
1318 module_init(inet6_init);
1319
1320 MODULE_ALIAS_NETPROTO(PF_INET6);
1321