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
67 #include <linux/uaccess.h>
68 #include <linux/mroute6.h>
69
70 #include "ip6_offload.h"
71
72 MODULE_AUTHOR("Cast of dozens");
73 MODULE_DESCRIPTION("IPv6 protocol stack for Linux");
74 MODULE_LICENSE("GPL");
75
76 /* The inetsw6 table contains everything that inet6_create needs to
77 * build a new socket.
78 */
79 static struct list_head inetsw6[SOCK_MAX];
80 static DEFINE_SPINLOCK(inetsw6_lock);
81
82 struct ipv6_params ipv6_defaults = {
83 .disable_ipv6 = 0,
84 .autoconf = 1,
85 };
86
87 static int disable_ipv6_mod;
88
89 module_param_named(disable, disable_ipv6_mod, int, 0444);
90 MODULE_PARM_DESC(disable, "Disable IPv6 module such that it is non-functional");
91
92 module_param_named(disable_ipv6, ipv6_defaults.disable_ipv6, int, 0444);
93 MODULE_PARM_DESC(disable_ipv6, "Disable IPv6 on all interfaces");
94
95 module_param_named(autoconf, ipv6_defaults.autoconf, int, 0444);
96 MODULE_PARM_DESC(autoconf, "Enable IPv6 address autoconfiguration on all interfaces");
97
ipv6_mod_enabled(void)98 bool ipv6_mod_enabled(void)
99 {
100 return disable_ipv6_mod == 0;
101 }
102 EXPORT_SYMBOL_GPL(ipv6_mod_enabled);
103
inet6_sk_generic(struct sock * sk)104 static __inline__ struct ipv6_pinfo *inet6_sk_generic(struct sock *sk)
105 {
106 const int offset = sk->sk_prot->obj_size - sizeof(struct ipv6_pinfo);
107
108 return (struct ipv6_pinfo *)(((u8 *)sk) + offset);
109 }
110
inet6_sock_destruct(struct sock * sk)111 void inet6_sock_destruct(struct sock *sk)
112 {
113 inet6_cleanup_sock(sk);
114 inet_sock_destruct(sk);
115 }
116 EXPORT_SYMBOL_GPL(inet6_sock_destruct);
117
inet6_create(struct net * net,struct socket * sock,int protocol,int kern)118 static int inet6_create(struct net *net, struct socket *sock, int protocol,
119 int kern)
120 {
121 struct inet_sock *inet;
122 struct ipv6_pinfo *np;
123 struct sock *sk;
124 struct inet_protosw *answer;
125 struct proto *answer_prot;
126 unsigned char answer_flags;
127 int try_loading_module = 0;
128 int err;
129
130 if (protocol < 0 || protocol >= IPPROTO_MAX)
131 return -EINVAL;
132
133 /* Look for the requested type/protocol pair. */
134 lookup_protocol:
135 err = -ESOCKTNOSUPPORT;
136 rcu_read_lock();
137 list_for_each_entry_rcu(answer, &inetsw6[sock->type], list) {
138
139 err = 0;
140 /* Check the non-wild match. */
141 if (protocol == answer->protocol) {
142 if (protocol != IPPROTO_IP)
143 break;
144 } else {
145 /* Check for the two wild cases. */
146 if (IPPROTO_IP == protocol) {
147 protocol = answer->protocol;
148 break;
149 }
150 if (IPPROTO_IP == answer->protocol)
151 break;
152 }
153 err = -EPROTONOSUPPORT;
154 }
155
156 if (err) {
157 if (try_loading_module < 2) {
158 rcu_read_unlock();
159 /*
160 * Be more specific, e.g. net-pf-10-proto-132-type-1
161 * (net-pf-PF_INET6-proto-IPPROTO_SCTP-type-SOCK_STREAM)
162 */
163 if (++try_loading_module == 1)
164 request_module("net-pf-%d-proto-%d-type-%d",
165 PF_INET6, protocol, sock->type);
166 /*
167 * Fall back to generic, e.g. net-pf-10-proto-132
168 * (net-pf-PF_INET6-proto-IPPROTO_SCTP)
169 */
170 else
171 request_module("net-pf-%d-proto-%d",
172 PF_INET6, protocol);
173 goto lookup_protocol;
174 } else
175 goto out_rcu_unlock;
176 }
177
178 err = -EPERM;
179 if (sock->type == SOCK_RAW && !kern &&
180 !ns_capable(net->user_ns, CAP_NET_RAW))
181 goto out_rcu_unlock;
182
183 sock->ops = answer->ops;
184 answer_prot = answer->prot;
185 answer_flags = answer->flags;
186 rcu_read_unlock();
187
188 WARN_ON(!answer_prot->slab);
189
190 err = -ENOBUFS;
191 sk = sk_alloc(net, PF_INET6, GFP_KERNEL, answer_prot, kern);
192 if (!sk)
193 goto out;
194
195 sock_init_data(sock, sk);
196
197 err = 0;
198 if (INET_PROTOSW_REUSE & answer_flags)
199 sk->sk_reuse = SK_CAN_REUSE;
200
201 if (INET_PROTOSW_ICSK & answer_flags)
202 inet_init_csk_locks(sk);
203
204 inet = inet_sk(sk);
205 inet->is_icsk = (INET_PROTOSW_ICSK & answer_flags) != 0;
206
207 if (SOCK_RAW == sock->type) {
208 inet->inet_num = protocol;
209 if (IPPROTO_RAW == protocol)
210 inet->hdrincl = 1;
211 }
212
213 sk->sk_destruct = inet6_sock_destruct;
214 sk->sk_family = PF_INET6;
215 sk->sk_protocol = protocol;
216
217 sk->sk_backlog_rcv = answer->prot->backlog_rcv;
218
219 inet_sk(sk)->pinet6 = np = inet6_sk_generic(sk);
220 np->hop_limit = -1;
221 np->mcast_hops = IPV6_DEFAULT_MCASTHOPS;
222 np->mc_loop = 1;
223 np->mc_all = 1;
224 np->pmtudisc = IPV6_PMTUDISC_WANT;
225 np->repflow = net->ipv6.sysctl.flowlabel_reflect & FLOWLABEL_REFLECT_ESTABLISHED;
226 sk->sk_ipv6only = net->ipv6.sysctl.bindv6only;
227
228 /* Init the ipv4 part of the socket since we can have sockets
229 * using v6 API for ipv4.
230 */
231 inet->uc_ttl = -1;
232
233 inet->mc_loop = 1;
234 inet->mc_ttl = 1;
235 inet->mc_index = 0;
236 RCU_INIT_POINTER(inet->mc_list, NULL);
237 inet->rcv_tos = 0;
238
239 if (READ_ONCE(net->ipv4.sysctl_ip_no_pmtu_disc))
240 inet->pmtudisc = IP_PMTUDISC_DONT;
241 else
242 inet->pmtudisc = IP_PMTUDISC_WANT;
243 /*
244 * Increment only the relevant sk_prot->socks debug field, this changes
245 * the previous behaviour of incrementing both the equivalent to
246 * answer->prot->socks (inet6_sock_nr) and inet_sock_nr.
247 *
248 * This allows better debug granularity as we'll know exactly how many
249 * UDPv6, TCPv6, etc socks were allocated, not the sum of all IPv6
250 * transport protocol socks. -acme
251 */
252 sk_refcnt_debug_inc(sk);
253
254 if (inet->inet_num) {
255 /* It assumes that any protocol which allows
256 * the user to assign a number at socket
257 * creation time automatically shares.
258 */
259 inet->inet_sport = htons(inet->inet_num);
260 err = sk->sk_prot->hash(sk);
261 if (err) {
262 sk_common_release(sk);
263 goto out;
264 }
265 }
266 if (sk->sk_prot->init) {
267 err = sk->sk_prot->init(sk);
268 if (err) {
269 sk_common_release(sk);
270 goto out;
271 }
272 }
273
274 if (!kern) {
275 err = BPF_CGROUP_RUN_PROG_INET_SOCK(sk);
276 if (err) {
277 sk_common_release(sk);
278 goto out;
279 }
280 }
281 out:
282 return err;
283 out_rcu_unlock:
284 rcu_read_unlock();
285 goto out;
286 }
287
__inet6_bind(struct sock * sk,struct sockaddr * uaddr,int addr_len,u32 flags)288 static int __inet6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len,
289 u32 flags)
290 {
291 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)uaddr;
292 struct inet_sock *inet = inet_sk(sk);
293 struct ipv6_pinfo *np = inet6_sk(sk);
294 struct net *net = sock_net(sk);
295 __be32 v4addr = 0;
296 unsigned short snum;
297 bool saved_ipv6only;
298 int addr_type = 0;
299 int err = 0;
300
301 if (addr->sin6_family != AF_INET6)
302 return -EAFNOSUPPORT;
303
304 addr_type = ipv6_addr_type(&addr->sin6_addr);
305 if ((addr_type & IPV6_ADDR_MULTICAST) && sk->sk_type == SOCK_STREAM)
306 return -EINVAL;
307
308 snum = ntohs(addr->sin6_port);
309 if (snum && inet_is_local_unbindable_port(net, snum))
310 return -EPERM;
311 if (!(flags & BIND_NO_CAP_NET_BIND_SERVICE) &&
312 snum && inet_port_requires_bind_service(net, snum) &&
313 !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE))
314 return -EACCES;
315
316 if (flags & BIND_WITH_LOCK)
317 lock_sock(sk);
318
319 /* Check these errors (active socket, double bind). */
320 if (sk->sk_state != TCP_CLOSE || inet->inet_num) {
321 err = -EINVAL;
322 goto out;
323 }
324
325 /* Check if the address belongs to the host. */
326 if (addr_type == IPV6_ADDR_MAPPED) {
327 struct net_device *dev = NULL;
328 int chk_addr_ret;
329
330 /* Binding to v4-mapped address on a v6-only socket
331 * makes no sense
332 */
333 if (sk->sk_ipv6only) {
334 err = -EINVAL;
335 goto out;
336 }
337
338 rcu_read_lock();
339 if (sk->sk_bound_dev_if) {
340 dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if);
341 if (!dev) {
342 err = -ENODEV;
343 goto out_unlock;
344 }
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_dev_table(net, dev, v4addr);
350 rcu_read_unlock();
351
352 if (!inet_can_nonlocal_bind(net, inet) &&
353 v4addr != htonl(INADDR_ANY) &&
354 chk_addr_ret != RTN_LOCAL &&
355 chk_addr_ret != RTN_MULTICAST &&
356 chk_addr_ret != RTN_BROADCAST) {
357 err = -EADDRNOTAVAIL;
358 goto out;
359 }
360 } else {
361 if (addr_type != IPV6_ADDR_ANY) {
362 struct net_device *dev = NULL;
363
364 rcu_read_lock();
365 if (__ipv6_addr_needs_scope_id(addr_type)) {
366 if (addr_len >= sizeof(struct sockaddr_in6) &&
367 addr->sin6_scope_id) {
368 /* Override any existing binding, if another one
369 * is supplied by user.
370 */
371 sk->sk_bound_dev_if = addr->sin6_scope_id;
372 }
373
374 /* Binding to link-local address requires an interface */
375 if (!sk->sk_bound_dev_if) {
376 err = -EINVAL;
377 goto out_unlock;
378 }
379 }
380
381 if (sk->sk_bound_dev_if) {
382 dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if);
383 if (!dev) {
384 err = -ENODEV;
385 goto out_unlock;
386 }
387 }
388
389 /* ipv4 addr of the socket is invalid. Only the
390 * unspecified and mapped address have a v4 equivalent.
391 */
392 v4addr = LOOPBACK4_IPV6;
393 if (!(addr_type & IPV6_ADDR_MULTICAST)) {
394 if (!ipv6_can_nonlocal_bind(net, inet) &&
395 !ipv6_chk_addr(net, &addr->sin6_addr,
396 dev, 0)) {
397 err = -EADDRNOTAVAIL;
398 goto out_unlock;
399 }
400 }
401 rcu_read_unlock();
402 }
403 }
404
405 inet->inet_rcv_saddr = v4addr;
406 inet->inet_saddr = v4addr;
407
408 sk->sk_v6_rcv_saddr = addr->sin6_addr;
409
410 if (!(addr_type & IPV6_ADDR_MULTICAST))
411 np->saddr = addr->sin6_addr;
412
413 saved_ipv6only = sk->sk_ipv6only;
414 if (addr_type != IPV6_ADDR_ANY && addr_type != IPV6_ADDR_MAPPED)
415 sk->sk_ipv6only = 1;
416
417 /* Make sure we are allowed to bind here. */
418 if (snum || !(inet->bind_address_no_port ||
419 (flags & BIND_FORCE_ADDRESS_NO_PORT))) {
420 if (sk->sk_prot->get_port(sk, snum)) {
421 sk->sk_ipv6only = saved_ipv6only;
422 inet_reset_saddr(sk);
423 err = -EADDRINUSE;
424 goto out;
425 }
426 if (!(flags & BIND_FROM_BPF)) {
427 err = BPF_CGROUP_RUN_PROG_INET6_POST_BIND(sk);
428 if (err) {
429 sk->sk_ipv6only = saved_ipv6only;
430 inet_reset_saddr(sk);
431 goto out;
432 }
433 }
434 }
435
436 if (addr_type != IPV6_ADDR_ANY)
437 sk->sk_userlocks |= SOCK_BINDADDR_LOCK;
438 if (snum)
439 sk->sk_userlocks |= SOCK_BINDPORT_LOCK;
440 inet->inet_sport = htons(inet->inet_num);
441 inet->inet_dport = 0;
442 inet->inet_daddr = 0;
443 out:
444 if (flags & BIND_WITH_LOCK)
445 release_sock(sk);
446 return err;
447 out_unlock:
448 rcu_read_unlock();
449 goto out;
450 }
451
452 /* bind for INET6 API */
inet6_bind(struct socket * sock,struct sockaddr * uaddr,int addr_len)453 int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
454 {
455 struct sock *sk = sock->sk;
456 u32 flags = BIND_WITH_LOCK;
457 int err = 0;
458
459 /* If the socket has its own bind function then use it. */
460 if (sk->sk_prot->bind)
461 return sk->sk_prot->bind(sk, uaddr, addr_len);
462
463 if (addr_len < SIN6_LEN_RFC2133)
464 return -EINVAL;
465
466 /* BPF prog is run before any checks are done so that if the prog
467 * changes context in a wrong way it will be caught.
468 */
469 err = BPF_CGROUP_RUN_PROG_INET_BIND_LOCK(sk, uaddr,
470 CGROUP_INET6_BIND, &flags);
471 if (err)
472 return err;
473
474 return __inet6_bind(sk, uaddr, addr_len, flags);
475 }
476 EXPORT_SYMBOL(inet6_bind);
477
inet6_release(struct socket * sock)478 int inet6_release(struct socket *sock)
479 {
480 struct sock *sk = sock->sk;
481
482 if (!sk)
483 return -EINVAL;
484
485 /* Free mc lists */
486 ipv6_sock_mc_close(sk);
487
488 /* Free ac lists */
489 ipv6_sock_ac_close(sk);
490
491 return inet_release(sock);
492 }
493 EXPORT_SYMBOL(inet6_release);
494
inet6_destroy_sock(struct sock * sk)495 void inet6_destroy_sock(struct sock *sk)
496 {
497 struct ipv6_pinfo *np = inet6_sk(sk);
498 struct sk_buff *skb;
499 struct ipv6_txoptions *opt;
500
501 /* Release rx options */
502
503 skb = xchg(&np->pktoptions, NULL);
504 kfree_skb(skb);
505
506 skb = xchg(&np->rxpmtu, NULL);
507 kfree_skb(skb);
508
509 /* Free flowlabels */
510 fl6_free_socklist(sk);
511
512 /* Free tx options */
513
514 opt = xchg((__force struct ipv6_txoptions **)&np->opt, NULL);
515 if (opt) {
516 atomic_sub(opt->tot_len, &sk->sk_omem_alloc);
517 txopt_put(opt);
518 }
519 }
520 EXPORT_SYMBOL_GPL(inet6_destroy_sock);
521
inet6_cleanup_sock(struct sock * sk)522 void inet6_cleanup_sock(struct sock *sk)
523 {
524 inet6_destroy_sock(sk);
525 }
526 EXPORT_SYMBOL_GPL(inet6_cleanup_sock);
527
528 /*
529 * This does both peername and sockname.
530 */
inet6_getname(struct socket * sock,struct sockaddr * uaddr,int peer)531 int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
532 int peer)
533 {
534 struct sockaddr_in6 *sin = (struct sockaddr_in6 *)uaddr;
535 struct sock *sk = sock->sk;
536 struct inet_sock *inet = inet_sk(sk);
537 struct ipv6_pinfo *np = inet6_sk(sk);
538
539 sin->sin6_family = AF_INET6;
540 sin->sin6_flowinfo = 0;
541 sin->sin6_scope_id = 0;
542 lock_sock(sk);
543 if (peer) {
544 if (!inet->inet_dport ||
545 (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) &&
546 peer == 1)) {
547 release_sock(sk);
548 return -ENOTCONN;
549 }
550 sin->sin6_port = inet->inet_dport;
551 sin->sin6_addr = sk->sk_v6_daddr;
552 if (np->sndflow)
553 sin->sin6_flowinfo = np->flow_label;
554 BPF_CGROUP_RUN_SA_PROG(sk, (struct sockaddr *)sin,
555 CGROUP_INET6_GETPEERNAME);
556 } else {
557 if (ipv6_addr_any(&sk->sk_v6_rcv_saddr))
558 sin->sin6_addr = np->saddr;
559 else
560 sin->sin6_addr = sk->sk_v6_rcv_saddr;
561 sin->sin6_port = inet->inet_sport;
562 BPF_CGROUP_RUN_SA_PROG(sk, (struct sockaddr *)sin,
563 CGROUP_INET6_GETSOCKNAME);
564 }
565 sin->sin6_scope_id = ipv6_iface_scope_id(&sin->sin6_addr,
566 sk->sk_bound_dev_if);
567 release_sock(sk);
568 return sizeof(*sin);
569 }
570 EXPORT_SYMBOL(inet6_getname);
571
inet6_ioctl(struct socket * sock,unsigned int cmd,unsigned long arg)572 int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
573 {
574 void __user *argp = (void __user *)arg;
575 struct sock *sk = sock->sk;
576 struct net *net = sock_net(sk);
577
578 switch (cmd) {
579 case SIOCADDRT:
580 case SIOCDELRT: {
581 struct in6_rtmsg rtmsg;
582
583 if (copy_from_user(&rtmsg, argp, sizeof(rtmsg)))
584 return -EFAULT;
585 return ipv6_route_ioctl(net, cmd, &rtmsg);
586 }
587 case SIOCSIFADDR:
588 return addrconf_add_ifaddr(net, argp);
589 case SIOCDIFADDR:
590 return addrconf_del_ifaddr(net, argp);
591 case SIOCSIFDSTADDR:
592 return addrconf_set_dstaddr(net, argp);
593 default:
594 if (!sk->sk_prot->ioctl)
595 return -ENOIOCTLCMD;
596 return sk->sk_prot->ioctl(sk, cmd, arg);
597 }
598 /*NOTREACHED*/
599 return 0;
600 }
601 EXPORT_SYMBOL(inet6_ioctl);
602
603 #ifdef CONFIG_COMPAT
604 struct compat_in6_rtmsg {
605 struct in6_addr rtmsg_dst;
606 struct in6_addr rtmsg_src;
607 struct in6_addr rtmsg_gateway;
608 u32 rtmsg_type;
609 u16 rtmsg_dst_len;
610 u16 rtmsg_src_len;
611 u32 rtmsg_metric;
612 u32 rtmsg_info;
613 u32 rtmsg_flags;
614 s32 rtmsg_ifindex;
615 };
616
inet6_compat_routing_ioctl(struct sock * sk,unsigned int cmd,struct compat_in6_rtmsg __user * ur)617 static int inet6_compat_routing_ioctl(struct sock *sk, unsigned int cmd,
618 struct compat_in6_rtmsg __user *ur)
619 {
620 struct in6_rtmsg rt;
621
622 if (copy_from_user(&rt.rtmsg_dst, &ur->rtmsg_dst,
623 3 * sizeof(struct in6_addr)) ||
624 get_user(rt.rtmsg_type, &ur->rtmsg_type) ||
625 get_user(rt.rtmsg_dst_len, &ur->rtmsg_dst_len) ||
626 get_user(rt.rtmsg_src_len, &ur->rtmsg_src_len) ||
627 get_user(rt.rtmsg_metric, &ur->rtmsg_metric) ||
628 get_user(rt.rtmsg_info, &ur->rtmsg_info) ||
629 get_user(rt.rtmsg_flags, &ur->rtmsg_flags) ||
630 get_user(rt.rtmsg_ifindex, &ur->rtmsg_ifindex))
631 return -EFAULT;
632
633
634 return ipv6_route_ioctl(sock_net(sk), cmd, &rt);
635 }
636
inet6_compat_ioctl(struct socket * sock,unsigned int cmd,unsigned long arg)637 int inet6_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
638 {
639 void __user *argp = compat_ptr(arg);
640 struct sock *sk = sock->sk;
641
642 switch (cmd) {
643 case SIOCADDRT:
644 case SIOCDELRT:
645 return inet6_compat_routing_ioctl(sk, cmd, argp);
646 default:
647 return -ENOIOCTLCMD;
648 }
649 }
650 EXPORT_SYMBOL_GPL(inet6_compat_ioctl);
651 #endif /* CONFIG_COMPAT */
652
653 INDIRECT_CALLABLE_DECLARE(int udpv6_sendmsg(struct sock *, struct msghdr *,
654 size_t));
inet6_sendmsg(struct socket * sock,struct msghdr * msg,size_t size)655 int inet6_sendmsg(struct socket *sock, struct msghdr *msg, size_t size)
656 {
657 struct sock *sk = sock->sk;
658
659 if (unlikely(inet_send_prepare(sk)))
660 return -EAGAIN;
661
662 return INDIRECT_CALL_2(sk->sk_prot->sendmsg, tcp_sendmsg, udpv6_sendmsg,
663 sk, msg, size);
664 }
665
666 INDIRECT_CALLABLE_DECLARE(int udpv6_recvmsg(struct sock *, struct msghdr *,
667 size_t, int, int, int *));
inet6_recvmsg(struct socket * sock,struct msghdr * msg,size_t size,int flags)668 int inet6_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
669 int flags)
670 {
671 struct sock *sk = sock->sk;
672 int addr_len = 0;
673 int err;
674
675 if (likely(!(flags & MSG_ERRQUEUE)))
676 sock_rps_record_flow(sk);
677
678 err = INDIRECT_CALL_2(sk->sk_prot->recvmsg, tcp_recvmsg, udpv6_recvmsg,
679 sk, msg, size, flags & MSG_DONTWAIT,
680 flags & ~MSG_DONTWAIT, &addr_len);
681 if (err >= 0)
682 msg->msg_namelen = addr_len;
683 return err;
684 }
685
686 const struct proto_ops inet6_stream_ops = {
687 .family = PF_INET6,
688 .owner = THIS_MODULE,
689 .release = inet6_release,
690 .bind = inet6_bind,
691 .connect = inet_stream_connect, /* ok */
692 .socketpair = sock_no_socketpair, /* a do nothing */
693 .accept = inet_accept, /* ok */
694 .getname = inet6_getname,
695 .poll = tcp_poll, /* ok */
696 .ioctl = inet6_ioctl, /* must change */
697 .gettstamp = sock_gettstamp,
698 .listen = inet_listen, /* ok */
699 .shutdown = inet_shutdown, /* ok */
700 .setsockopt = sock_common_setsockopt, /* ok */
701 .getsockopt = sock_common_getsockopt, /* ok */
702 .sendmsg = inet6_sendmsg, /* retpoline's sake */
703 .recvmsg = inet6_recvmsg, /* retpoline's sake */
704 #ifdef CONFIG_MMU
705 .mmap = tcp_mmap,
706 #endif
707 .sendpage = inet_sendpage,
708 .sendmsg_locked = tcp_sendmsg_locked,
709 .sendpage_locked = tcp_sendpage_locked,
710 .splice_read = tcp_splice_read,
711 .read_sock = tcp_read_sock,
712 .peek_len = tcp_peek_len,
713 #ifdef CONFIG_COMPAT
714 .compat_ioctl = inet6_compat_ioctl,
715 #endif
716 .set_rcvlowat = tcp_set_rcvlowat,
717 };
718
719 const struct proto_ops inet6_dgram_ops = {
720 .family = PF_INET6,
721 .owner = THIS_MODULE,
722 .release = inet6_release,
723 .bind = inet6_bind,
724 .connect = inet_dgram_connect, /* ok */
725 .socketpair = sock_no_socketpair, /* a do nothing */
726 .accept = sock_no_accept, /* a do nothing */
727 .getname = inet6_getname,
728 .poll = udp_poll, /* ok */
729 .ioctl = inet6_ioctl, /* must change */
730 .gettstamp = sock_gettstamp,
731 .listen = sock_no_listen, /* ok */
732 .shutdown = inet_shutdown, /* ok */
733 .setsockopt = sock_common_setsockopt, /* ok */
734 .getsockopt = sock_common_getsockopt, /* ok */
735 .sendmsg = inet6_sendmsg, /* retpoline's sake */
736 .recvmsg = inet6_recvmsg, /* retpoline's sake */
737 .read_sock = udp_read_sock,
738 .mmap = sock_no_mmap,
739 .sendpage = sock_no_sendpage,
740 .set_peek_off = sk_set_peek_off,
741 #ifdef CONFIG_COMPAT
742 .compat_ioctl = inet6_compat_ioctl,
743 #endif
744 };
745
746 static const struct net_proto_family inet6_family_ops = {
747 .family = PF_INET6,
748 .create = inet6_create,
749 .owner = THIS_MODULE,
750 };
751
inet6_register_protosw(struct inet_protosw * p)752 int inet6_register_protosw(struct inet_protosw *p)
753 {
754 struct list_head *lh;
755 struct inet_protosw *answer;
756 struct list_head *last_perm;
757 int protocol = p->protocol;
758 int ret;
759
760 spin_lock_bh(&inetsw6_lock);
761
762 ret = -EINVAL;
763 if (p->type >= SOCK_MAX)
764 goto out_illegal;
765
766 /* If we are trying to override a permanent protocol, bail. */
767 answer = NULL;
768 ret = -EPERM;
769 last_perm = &inetsw6[p->type];
770 list_for_each(lh, &inetsw6[p->type]) {
771 answer = list_entry(lh, struct inet_protosw, list);
772
773 /* Check only the non-wild match. */
774 if (INET_PROTOSW_PERMANENT & answer->flags) {
775 if (protocol == answer->protocol)
776 break;
777 last_perm = lh;
778 }
779
780 answer = NULL;
781 }
782 if (answer)
783 goto out_permanent;
784
785 /* Add the new entry after the last permanent entry if any, so that
786 * the new entry does not override a permanent entry when matched with
787 * a wild-card protocol. But it is allowed to override any existing
788 * non-permanent entry. This means that when we remove this entry, the
789 * system automatically returns to the old behavior.
790 */
791 list_add_rcu(&p->list, last_perm);
792 ret = 0;
793 out:
794 spin_unlock_bh(&inetsw6_lock);
795 return ret;
796
797 out_permanent:
798 pr_err("Attempt to override permanent protocol %d\n", protocol);
799 goto out;
800
801 out_illegal:
802 pr_err("Ignoring attempt to register invalid socket type %d\n",
803 p->type);
804 goto out;
805 }
806 EXPORT_SYMBOL(inet6_register_protosw);
807
808 void
inet6_unregister_protosw(struct inet_protosw * p)809 inet6_unregister_protosw(struct inet_protosw *p)
810 {
811 if (INET_PROTOSW_PERMANENT & p->flags) {
812 pr_err("Attempt to unregister permanent protocol %d\n",
813 p->protocol);
814 } else {
815 spin_lock_bh(&inetsw6_lock);
816 list_del_rcu(&p->list);
817 spin_unlock_bh(&inetsw6_lock);
818
819 synchronize_net();
820 }
821 }
822 EXPORT_SYMBOL(inet6_unregister_protosw);
823
inet6_sk_rebuild_header(struct sock * sk)824 int inet6_sk_rebuild_header(struct sock *sk)
825 {
826 struct ipv6_pinfo *np = inet6_sk(sk);
827 struct dst_entry *dst;
828
829 dst = __sk_dst_check(sk, np->dst_cookie);
830
831 if (!dst) {
832 struct inet_sock *inet = inet_sk(sk);
833 struct in6_addr *final_p, final;
834 struct flowi6 fl6;
835
836 memset(&fl6, 0, sizeof(fl6));
837 fl6.flowi6_proto = sk->sk_protocol;
838 fl6.daddr = sk->sk_v6_daddr;
839 fl6.saddr = np->saddr;
840 fl6.flowlabel = np->flow_label;
841 fl6.flowi6_oif = sk->sk_bound_dev_if;
842 fl6.flowi6_mark = sk->sk_mark;
843 fl6.fl6_dport = inet->inet_dport;
844 fl6.fl6_sport = inet->inet_sport;
845 fl6.flowi6_uid = sk->sk_uid;
846 security_sk_classify_flow(sk, flowi6_to_flowi_common(&fl6));
847
848 rcu_read_lock();
849 final_p = fl6_update_dst(&fl6, rcu_dereference(np->opt),
850 &final);
851 rcu_read_unlock();
852
853 dst = ip6_dst_lookup_flow(sock_net(sk), sk, &fl6, final_p);
854 if (IS_ERR(dst)) {
855 sk->sk_route_caps = 0;
856 sk->sk_err_soft = -PTR_ERR(dst);
857 return PTR_ERR(dst);
858 }
859
860 ip6_dst_store(sk, dst, NULL, NULL);
861 }
862
863 return 0;
864 }
865 EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header);
866
ipv6_opt_accepted(const struct sock * sk,const struct sk_buff * skb,const struct inet6_skb_parm * opt)867 bool ipv6_opt_accepted(const struct sock *sk, const struct sk_buff *skb,
868 const struct inet6_skb_parm *opt)
869 {
870 const struct ipv6_pinfo *np = inet6_sk(sk);
871
872 if (np->rxopt.all) {
873 if (((opt->flags & IP6SKB_HOPBYHOP) &&
874 (np->rxopt.bits.hopopts || np->rxopt.bits.ohopopts)) ||
875 (ip6_flowinfo((struct ipv6hdr *) skb_network_header(skb)) &&
876 np->rxopt.bits.rxflow) ||
877 (opt->srcrt && (np->rxopt.bits.srcrt ||
878 np->rxopt.bits.osrcrt)) ||
879 ((opt->dst1 || opt->dst0) &&
880 (np->rxopt.bits.dstopts || np->rxopt.bits.odstopts)))
881 return true;
882 }
883 return false;
884 }
885 EXPORT_SYMBOL_GPL(ipv6_opt_accepted);
886
887 static struct packet_type ipv6_packet_type __read_mostly = {
888 .type = cpu_to_be16(ETH_P_IPV6),
889 .func = ipv6_rcv,
890 .list_func = ipv6_list_rcv,
891 };
892
ipv6_packet_init(void)893 static int __init ipv6_packet_init(void)
894 {
895 dev_add_pack(&ipv6_packet_type);
896 return 0;
897 }
898
ipv6_packet_cleanup(void)899 static void ipv6_packet_cleanup(void)
900 {
901 dev_remove_pack(&ipv6_packet_type);
902 }
903
ipv6_init_mibs(struct net * net)904 static int __net_init ipv6_init_mibs(struct net *net)
905 {
906 int i;
907
908 net->mib.udp_stats_in6 = alloc_percpu(struct udp_mib);
909 if (!net->mib.udp_stats_in6)
910 return -ENOMEM;
911 net->mib.udplite_stats_in6 = alloc_percpu(struct udp_mib);
912 if (!net->mib.udplite_stats_in6)
913 goto err_udplite_mib;
914 net->mib.ipv6_statistics = alloc_percpu(struct ipstats_mib);
915 if (!net->mib.ipv6_statistics)
916 goto err_ip_mib;
917
918 for_each_possible_cpu(i) {
919 struct ipstats_mib *af_inet6_stats;
920 af_inet6_stats = per_cpu_ptr(net->mib.ipv6_statistics, i);
921 u64_stats_init(&af_inet6_stats->syncp);
922 }
923
924
925 net->mib.icmpv6_statistics = alloc_percpu(struct icmpv6_mib);
926 if (!net->mib.icmpv6_statistics)
927 goto err_icmp_mib;
928 net->mib.icmpv6msg_statistics = kzalloc(sizeof(struct icmpv6msg_mib),
929 GFP_KERNEL);
930 if (!net->mib.icmpv6msg_statistics)
931 goto err_icmpmsg_mib;
932 return 0;
933
934 err_icmpmsg_mib:
935 free_percpu(net->mib.icmpv6_statistics);
936 err_icmp_mib:
937 free_percpu(net->mib.ipv6_statistics);
938 err_ip_mib:
939 free_percpu(net->mib.udplite_stats_in6);
940 err_udplite_mib:
941 free_percpu(net->mib.udp_stats_in6);
942 return -ENOMEM;
943 }
944
ipv6_cleanup_mibs(struct net * net)945 static void ipv6_cleanup_mibs(struct net *net)
946 {
947 free_percpu(net->mib.udp_stats_in6);
948 free_percpu(net->mib.udplite_stats_in6);
949 free_percpu(net->mib.ipv6_statistics);
950 free_percpu(net->mib.icmpv6_statistics);
951 kfree(net->mib.icmpv6msg_statistics);
952 }
953
inet6_net_init(struct net * net)954 static int __net_init inet6_net_init(struct net *net)
955 {
956 int err = 0;
957
958 net->ipv6.sysctl.bindv6only = 0;
959 net->ipv6.sysctl.icmpv6_time = 1*HZ;
960 net->ipv6.sysctl.icmpv6_echo_ignore_all = 0;
961 net->ipv6.sysctl.icmpv6_echo_ignore_multicast = 0;
962 net->ipv6.sysctl.icmpv6_echo_ignore_anycast = 0;
963
964 /* By default, rate limit error messages.
965 * Except for pmtu discovery, it would break it.
966 * proc_do_large_bitmap needs pointer to the bitmap.
967 */
968 bitmap_set(net->ipv6.sysctl.icmpv6_ratemask, 0, ICMPV6_ERRMSG_MAX + 1);
969 bitmap_clear(net->ipv6.sysctl.icmpv6_ratemask, ICMPV6_PKT_TOOBIG, 1);
970 net->ipv6.sysctl.icmpv6_ratemask_ptr = net->ipv6.sysctl.icmpv6_ratemask;
971
972 net->ipv6.sysctl.flowlabel_consistency = 1;
973 net->ipv6.sysctl.auto_flowlabels = IP6_DEFAULT_AUTO_FLOW_LABELS;
974 net->ipv6.sysctl.idgen_retries = 3;
975 net->ipv6.sysctl.idgen_delay = 1 * HZ;
976 net->ipv6.sysctl.flowlabel_state_ranges = 0;
977 net->ipv6.sysctl.max_dst_opts_cnt = IP6_DEFAULT_MAX_DST_OPTS_CNT;
978 net->ipv6.sysctl.max_hbh_opts_cnt = IP6_DEFAULT_MAX_HBH_OPTS_CNT;
979 net->ipv6.sysctl.max_dst_opts_len = IP6_DEFAULT_MAX_DST_OPTS_LEN;
980 net->ipv6.sysctl.max_hbh_opts_len = IP6_DEFAULT_MAX_HBH_OPTS_LEN;
981 net->ipv6.sysctl.fib_notify_on_flag_change = 0;
982 atomic_set(&net->ipv6.fib6_sernum, 1);
983
984 net->ipv6.sysctl.ioam6_id = IOAM6_DEFAULT_ID;
985 net->ipv6.sysctl.ioam6_id_wide = IOAM6_DEFAULT_ID_WIDE;
986
987 err = ipv6_init_mibs(net);
988 if (err)
989 return err;
990 #ifdef CONFIG_PROC_FS
991 err = udp6_proc_init(net);
992 if (err)
993 goto out;
994 err = tcp6_proc_init(net);
995 if (err)
996 goto proc_tcp6_fail;
997 err = ac6_proc_init(net);
998 if (err)
999 goto proc_ac6_fail;
1000 #endif
1001 return err;
1002
1003 #ifdef CONFIG_PROC_FS
1004 proc_ac6_fail:
1005 tcp6_proc_exit(net);
1006 proc_tcp6_fail:
1007 udp6_proc_exit(net);
1008 out:
1009 ipv6_cleanup_mibs(net);
1010 return err;
1011 #endif
1012 }
1013
inet6_net_exit(struct net * net)1014 static void __net_exit inet6_net_exit(struct net *net)
1015 {
1016 #ifdef CONFIG_PROC_FS
1017 udp6_proc_exit(net);
1018 tcp6_proc_exit(net);
1019 ac6_proc_exit(net);
1020 #endif
1021 ipv6_cleanup_mibs(net);
1022 }
1023
1024 static struct pernet_operations inet6_net_ops = {
1025 .init = inet6_net_init,
1026 .exit = inet6_net_exit,
1027 };
1028
ipv6_route_input(struct sk_buff * skb)1029 static int ipv6_route_input(struct sk_buff *skb)
1030 {
1031 ip6_route_input(skb);
1032 return skb_dst(skb)->error;
1033 }
1034
1035 static const struct ipv6_stub ipv6_stub_impl = {
1036 .ipv6_sock_mc_join = ipv6_sock_mc_join,
1037 .ipv6_sock_mc_drop = ipv6_sock_mc_drop,
1038 .ipv6_dst_lookup_flow = ip6_dst_lookup_flow,
1039 .ipv6_route_input = ipv6_route_input,
1040 .fib6_get_table = fib6_get_table,
1041 .fib6_table_lookup = fib6_table_lookup,
1042 .fib6_lookup = fib6_lookup,
1043 .fib6_select_path = fib6_select_path,
1044 .ip6_mtu_from_fib6 = ip6_mtu_from_fib6,
1045 .fib6_nh_init = fib6_nh_init,
1046 .fib6_nh_release = fib6_nh_release,
1047 .fib6_nh_release_dsts = fib6_nh_release_dsts,
1048 .fib6_update_sernum = fib6_update_sernum_stub,
1049 .fib6_rt_update = fib6_rt_update,
1050 .ip6_del_rt = ip6_del_rt,
1051 .udpv6_encap_enable = udpv6_encap_enable,
1052 .ndisc_send_na = ndisc_send_na,
1053 #if IS_ENABLED(CONFIG_XFRM)
1054 .xfrm6_local_rxpmtu = xfrm6_local_rxpmtu,
1055 .xfrm6_udp_encap_rcv = xfrm6_udp_encap_rcv,
1056 .xfrm6_rcv_encap = xfrm6_rcv_encap,
1057 #endif
1058 .nd_tbl = &nd_tbl,
1059 .ipv6_fragment = ip6_fragment,
1060 .ipv6_dev_find = ipv6_dev_find,
1061 };
1062
1063 static const struct ipv6_bpf_stub ipv6_bpf_stub_impl = {
1064 .inet6_bind = __inet6_bind,
1065 .udp6_lib_lookup = __udp6_lib_lookup,
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 if (disable_ipv6_mod) {
1080 pr_info("Loaded, but administratively disabled, reboot required to enable\n");
1081 goto out;
1082 }
1083
1084 err = proto_register(&tcpv6_prot, 1);
1085 if (err)
1086 goto out;
1087
1088 err = proto_register(&udpv6_prot, 1);
1089 if (err)
1090 goto out_unregister_tcp_proto;
1091
1092 err = proto_register(&udplitev6_prot, 1);
1093 if (err)
1094 goto out_unregister_udp_proto;
1095
1096 err = proto_register(&rawv6_prot, 1);
1097 if (err)
1098 goto out_unregister_udplite_proto;
1099
1100 err = proto_register(&pingv6_prot, 1);
1101 if (err)
1102 goto out_unregister_raw_proto;
1103
1104 /* We MUST register RAW sockets before we create the ICMP6,
1105 * IGMP6, or NDISC control sockets.
1106 */
1107 err = rawv6_init();
1108 if (err)
1109 goto out_unregister_ping_proto;
1110
1111 /* Register the family here so that the init calls below will
1112 * be able to create sockets. (?? is this dangerous ??)
1113 */
1114 err = sock_register(&inet6_family_ops);
1115 if (err)
1116 goto out_sock_register_fail;
1117
1118 /*
1119 * ipngwg API draft makes clear that the correct semantics
1120 * for TCP and UDP is to consider one TCP and UDP instance
1121 * in a host available by both INET and INET6 APIs and
1122 * able to communicate via both network protocols.
1123 */
1124
1125 err = register_pernet_subsys(&inet6_net_ops);
1126 if (err)
1127 goto register_pernet_fail;
1128 err = ip6_mr_init();
1129 if (err)
1130 goto ipmr_fail;
1131 err = icmpv6_init();
1132 if (err)
1133 goto icmp_fail;
1134 err = ndisc_init();
1135 if (err)
1136 goto ndisc_fail;
1137 err = igmp6_init();
1138 if (err)
1139 goto igmp_fail;
1140
1141 err = ipv6_netfilter_init();
1142 if (err)
1143 goto netfilter_fail;
1144 /* Create /proc/foo6 entries. */
1145 #ifdef CONFIG_PROC_FS
1146 err = -ENOMEM;
1147 if (raw6_proc_init())
1148 goto proc_raw6_fail;
1149 if (udplite6_proc_init())
1150 goto proc_udplite6_fail;
1151 if (ipv6_misc_proc_init())
1152 goto proc_misc6_fail;
1153 if (if6_proc_init())
1154 goto proc_if6_fail;
1155 #endif
1156 err = ip6_route_init();
1157 if (err)
1158 goto ip6_route_fail;
1159 err = ndisc_late_init();
1160 if (err)
1161 goto ndisc_late_fail;
1162 err = ip6_flowlabel_init();
1163 if (err)
1164 goto ip6_flowlabel_fail;
1165 err = ipv6_anycast_init();
1166 if (err)
1167 goto ipv6_anycast_fail;
1168 err = addrconf_init();
1169 if (err)
1170 goto addrconf_fail;
1171
1172 /* Init v6 extension headers. */
1173 err = ipv6_exthdrs_init();
1174 if (err)
1175 goto ipv6_exthdrs_fail;
1176
1177 err = ipv6_frag_init();
1178 if (err)
1179 goto ipv6_frag_fail;
1180
1181 /* Init v6 transport protocols. */
1182 err = udpv6_init();
1183 if (err)
1184 goto udpv6_fail;
1185
1186 err = udplitev6_init();
1187 if (err)
1188 goto udplitev6_fail;
1189
1190 err = udpv6_offload_init();
1191 if (err)
1192 goto udpv6_offload_fail;
1193
1194 err = tcpv6_init();
1195 if (err)
1196 goto tcpv6_fail;
1197
1198 err = ipv6_packet_init();
1199 if (err)
1200 goto ipv6_packet_fail;
1201
1202 err = pingv6_init();
1203 if (err)
1204 goto pingv6_fail;
1205
1206 err = calipso_init();
1207 if (err)
1208 goto calipso_fail;
1209
1210 err = seg6_init();
1211 if (err)
1212 goto seg6_fail;
1213
1214 err = rpl_init();
1215 if (err)
1216 goto rpl_fail;
1217
1218 err = ioam6_init();
1219 if (err)
1220 goto ioam6_fail;
1221
1222 err = igmp6_late_init();
1223 if (err)
1224 goto igmp6_late_err;
1225
1226 #ifdef CONFIG_SYSCTL
1227 err = ipv6_sysctl_register();
1228 if (err)
1229 goto sysctl_fail;
1230 #endif
1231
1232 /* ensure that ipv6 stubs are visible only after ipv6 is ready */
1233 wmb();
1234 ipv6_stub = &ipv6_stub_impl;
1235 ipv6_bpf_stub = &ipv6_bpf_stub_impl;
1236 out:
1237 return err;
1238
1239 #ifdef CONFIG_SYSCTL
1240 sysctl_fail:
1241 igmp6_late_cleanup();
1242 #endif
1243 igmp6_late_err:
1244 ioam6_exit();
1245 ioam6_fail:
1246 rpl_exit();
1247 rpl_fail:
1248 seg6_exit();
1249 seg6_fail:
1250 calipso_exit();
1251 calipso_fail:
1252 pingv6_exit();
1253 pingv6_fail:
1254 ipv6_packet_cleanup();
1255 ipv6_packet_fail:
1256 tcpv6_exit();
1257 tcpv6_fail:
1258 udpv6_offload_exit();
1259 udpv6_offload_fail:
1260 udplitev6_exit();
1261 udplitev6_fail:
1262 udpv6_exit();
1263 udpv6_fail:
1264 ipv6_frag_exit();
1265 ipv6_frag_fail:
1266 ipv6_exthdrs_exit();
1267 ipv6_exthdrs_fail:
1268 addrconf_cleanup();
1269 addrconf_fail:
1270 ipv6_anycast_cleanup();
1271 ipv6_anycast_fail:
1272 ip6_flowlabel_cleanup();
1273 ip6_flowlabel_fail:
1274 ndisc_late_cleanup();
1275 ndisc_late_fail:
1276 ip6_route_cleanup();
1277 ip6_route_fail:
1278 #ifdef CONFIG_PROC_FS
1279 if6_proc_exit();
1280 proc_if6_fail:
1281 ipv6_misc_proc_exit();
1282 proc_misc6_fail:
1283 udplite6_proc_exit();
1284 proc_udplite6_fail:
1285 raw6_proc_exit();
1286 proc_raw6_fail:
1287 #endif
1288 ipv6_netfilter_fini();
1289 netfilter_fail:
1290 igmp6_cleanup();
1291 igmp_fail:
1292 ndisc_cleanup();
1293 ndisc_fail:
1294 icmpv6_cleanup();
1295 icmp_fail:
1296 ip6_mr_cleanup();
1297 ipmr_fail:
1298 unregister_pernet_subsys(&inet6_net_ops);
1299 register_pernet_fail:
1300 sock_unregister(PF_INET6);
1301 rtnl_unregister_all(PF_INET6);
1302 out_sock_register_fail:
1303 rawv6_exit();
1304 out_unregister_ping_proto:
1305 proto_unregister(&pingv6_prot);
1306 out_unregister_raw_proto:
1307 proto_unregister(&rawv6_prot);
1308 out_unregister_udplite_proto:
1309 proto_unregister(&udplitev6_prot);
1310 out_unregister_udp_proto:
1311 proto_unregister(&udpv6_prot);
1312 out_unregister_tcp_proto:
1313 proto_unregister(&tcpv6_prot);
1314 goto out;
1315 }
1316 module_init(inet6_init);
1317
1318 MODULE_ALIAS_NETPROTO(PF_INET6);
1319