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