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 __inline__ struct ipv6_pinfo *inet6_sk_generic(struct sock *sk)
106 {
107 const int offset = sk->sk_prot->obj_size - sizeof(struct ipv6_pinfo);
108
109 return (struct ipv6_pinfo *)(((u8 *)sk) + offset);
110 }
111
inet6_create(struct net * net,struct socket * sock,int protocol,int kern)112 static int inet6_create(struct net *net, struct socket *sock, int protocol,
113 int kern)
114 {
115 struct inet_sock *inet;
116 struct ipv6_pinfo *np;
117 struct sock *sk;
118 struct inet_protosw *answer;
119 struct proto *answer_prot;
120 unsigned char answer_flags;
121 int try_loading_module = 0;
122 int err;
123
124 if (protocol < 0 || protocol >= IPPROTO_MAX)
125 return -EINVAL;
126
127 /* Look for the requested type/protocol pair. */
128 lookup_protocol:
129 err = -ESOCKTNOSUPPORT;
130 rcu_read_lock();
131 list_for_each_entry_rcu(answer, &inetsw6[sock->type], list) {
132
133 err = 0;
134 /* Check the non-wild match. */
135 if (protocol == answer->protocol) {
136 if (protocol != IPPROTO_IP)
137 break;
138 } else {
139 /* Check for the two wild cases. */
140 if (IPPROTO_IP == protocol) {
141 protocol = answer->protocol;
142 break;
143 }
144 if (IPPROTO_IP == answer->protocol)
145 break;
146 }
147 err = -EPROTONOSUPPORT;
148 }
149
150 if (err) {
151 if (try_loading_module < 2) {
152 rcu_read_unlock();
153 /*
154 * Be more specific, e.g. net-pf-10-proto-132-type-1
155 * (net-pf-PF_INET6-proto-IPPROTO_SCTP-type-SOCK_STREAM)
156 */
157 if (++try_loading_module == 1)
158 request_module("net-pf-%d-proto-%d-type-%d",
159 PF_INET6, protocol, sock->type);
160 /*
161 * Fall back to generic, e.g. net-pf-10-proto-132
162 * (net-pf-PF_INET6-proto-IPPROTO_SCTP)
163 */
164 else
165 request_module("net-pf-%d-proto-%d",
166 PF_INET6, protocol);
167 goto lookup_protocol;
168 } else
169 goto out_rcu_unlock;
170 }
171
172 err = -EPERM;
173 if (sock->type == SOCK_RAW && !kern &&
174 !ns_capable(net->user_ns, CAP_NET_RAW))
175 goto out_rcu_unlock;
176
177 sock->ops = answer->ops;
178 answer_prot = answer->prot;
179 answer_flags = answer->flags;
180 rcu_read_unlock();
181
182 WARN_ON(!answer_prot->slab);
183
184 err = -ENOBUFS;
185 sk = sk_alloc(net, PF_INET6, GFP_KERNEL, answer_prot, kern);
186 if (!sk)
187 goto out;
188
189 sock_init_data(sock, sk);
190
191 err = 0;
192 if (INET_PROTOSW_REUSE & answer_flags)
193 sk->sk_reuse = SK_CAN_REUSE;
194
195 inet = inet_sk(sk);
196 inet->is_icsk = (INET_PROTOSW_ICSK & answer_flags) != 0;
197
198 if (SOCK_RAW == sock->type) {
199 inet->inet_num = protocol;
200 if (IPPROTO_RAW == protocol)
201 inet->hdrincl = 1;
202 }
203
204 sk->sk_destruct = inet_sock_destruct;
205 sk->sk_family = PF_INET6;
206 sk->sk_protocol = protocol;
207
208 sk->sk_backlog_rcv = answer->prot->backlog_rcv;
209
210 inet_sk(sk)->pinet6 = np = inet6_sk_generic(sk);
211 np->hop_limit = -1;
212 np->mcast_hops = IPV6_DEFAULT_MCASTHOPS;
213 np->mc_loop = 1;
214 np->mc_all = 1;
215 np->pmtudisc = IPV6_PMTUDISC_WANT;
216 np->repflow = net->ipv6.sysctl.flowlabel_reflect & FLOWLABEL_REFLECT_ESTABLISHED;
217 sk->sk_ipv6only = net->ipv6.sysctl.bindv6only;
218
219 /* Init the ipv4 part of the socket since we can have sockets
220 * using v6 API for ipv4.
221 */
222 inet->uc_ttl = -1;
223
224 inet->mc_loop = 1;
225 inet->mc_ttl = 1;
226 inet->mc_index = 0;
227 RCU_INIT_POINTER(inet->mc_list, NULL);
228 inet->rcv_tos = 0;
229
230 if (READ_ONCE(net->ipv4.sysctl_ip_no_pmtu_disc))
231 inet->pmtudisc = IP_PMTUDISC_DONT;
232 else
233 inet->pmtudisc = IP_PMTUDISC_WANT;
234 /*
235 * Increment only the relevant sk_prot->socks debug field, this changes
236 * the previous behaviour of incrementing both the equivalent to
237 * answer->prot->socks (inet6_sock_nr) and inet_sock_nr.
238 *
239 * This allows better debug granularity as we'll know exactly how many
240 * UDPv6, TCPv6, etc socks were allocated, not the sum of all IPv6
241 * transport protocol socks. -acme
242 */
243 sk_refcnt_debug_inc(sk);
244
245 if (inet->inet_num) {
246 /* It assumes that any protocol which allows
247 * the user to assign a number at socket
248 * creation time automatically shares.
249 */
250 inet->inet_sport = htons(inet->inet_num);
251 err = sk->sk_prot->hash(sk);
252 if (err) {
253 sk_common_release(sk);
254 goto out;
255 }
256 }
257 if (sk->sk_prot->init) {
258 err = sk->sk_prot->init(sk);
259 if (err) {
260 sk_common_release(sk);
261 goto out;
262 }
263 }
264
265 if (!kern) {
266 err = BPF_CGROUP_RUN_PROG_INET_SOCK(sk);
267 if (err) {
268 sk_common_release(sk);
269 goto out;
270 }
271 }
272 out:
273 return err;
274 out_rcu_unlock:
275 rcu_read_unlock();
276 goto out;
277 }
278
__inet6_bind(struct sock * sk,struct sockaddr * uaddr,int addr_len,u32 flags)279 static int __inet6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len,
280 u32 flags)
281 {
282 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)uaddr;
283 struct inet_sock *inet = inet_sk(sk);
284 struct ipv6_pinfo *np = inet6_sk(sk);
285 struct net *net = sock_net(sk);
286 __be32 v4addr = 0;
287 unsigned short snum;
288 bool saved_ipv6only;
289 int addr_type = 0;
290 int err = 0;
291
292 if (addr->sin6_family != AF_INET6)
293 return -EAFNOSUPPORT;
294
295 addr_type = ipv6_addr_type(&addr->sin6_addr);
296 if ((addr_type & IPV6_ADDR_MULTICAST) && sk->sk_type == SOCK_STREAM)
297 return -EINVAL;
298
299 snum = ntohs(addr->sin6_port);
300 if (!(flags & BIND_NO_CAP_NET_BIND_SERVICE) &&
301 snum && inet_port_requires_bind_service(net, snum) &&
302 !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE))
303 return -EACCES;
304
305 if (flags & BIND_WITH_LOCK)
306 lock_sock(sk);
307
308 /* Check these errors (active socket, double bind). */
309 if (sk->sk_state != TCP_CLOSE || inet->inet_num) {
310 err = -EINVAL;
311 goto out;
312 }
313
314 /* Check if the address belongs to the host. */
315 if (addr_type == IPV6_ADDR_MAPPED) {
316 struct net_device *dev = NULL;
317 int chk_addr_ret;
318
319 /* Binding to v4-mapped address on a v6-only socket
320 * makes no sense
321 */
322 if (ipv6_only_sock(sk)) {
323 err = -EINVAL;
324 goto out;
325 }
326
327 rcu_read_lock();
328 if (sk->sk_bound_dev_if) {
329 dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if);
330 if (!dev) {
331 err = -ENODEV;
332 goto out_unlock;
333 }
334 }
335
336 /* Reproduce AF_INET checks to make the bindings consistent */
337 v4addr = addr->sin6_addr.s6_addr32[3];
338 chk_addr_ret = inet_addr_type_dev_table(net, dev, v4addr);
339 rcu_read_unlock();
340
341 if (!inet_addr_valid_or_nonlocal(net, inet, v4addr,
342 chk_addr_ret)) {
343 err = -EADDRNOTAVAIL;
344 goto out;
345 }
346 } else {
347 if (addr_type != IPV6_ADDR_ANY) {
348 struct net_device *dev = NULL;
349
350 rcu_read_lock();
351 if (__ipv6_addr_needs_scope_id(addr_type)) {
352 if (addr_len >= sizeof(struct sockaddr_in6) &&
353 addr->sin6_scope_id) {
354 /* Override any existing binding, if another one
355 * is supplied by user.
356 */
357 sk->sk_bound_dev_if = addr->sin6_scope_id;
358 }
359
360 /* Binding to link-local address requires an interface */
361 if (!sk->sk_bound_dev_if) {
362 err = -EINVAL;
363 goto out_unlock;
364 }
365 }
366
367 if (sk->sk_bound_dev_if) {
368 dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if);
369 if (!dev) {
370 err = -ENODEV;
371 goto out_unlock;
372 }
373 }
374
375 /* ipv4 addr of the socket is invalid. Only the
376 * unspecified and mapped address have a v4 equivalent.
377 */
378 v4addr = LOOPBACK4_IPV6;
379 if (!(addr_type & IPV6_ADDR_MULTICAST)) {
380 if (!ipv6_can_nonlocal_bind(net, inet) &&
381 !ipv6_chk_addr(net, &addr->sin6_addr,
382 dev, 0)) {
383 err = -EADDRNOTAVAIL;
384 goto out_unlock;
385 }
386 }
387 rcu_read_unlock();
388 }
389 }
390
391 inet->inet_rcv_saddr = v4addr;
392 inet->inet_saddr = v4addr;
393
394 sk->sk_v6_rcv_saddr = addr->sin6_addr;
395
396 if (!(addr_type & IPV6_ADDR_MULTICAST))
397 np->saddr = addr->sin6_addr;
398
399 saved_ipv6only = sk->sk_ipv6only;
400 if (addr_type != IPV6_ADDR_ANY && addr_type != IPV6_ADDR_MAPPED)
401 sk->sk_ipv6only = 1;
402
403 /* Make sure we are allowed to bind here. */
404 if (snum || !(inet->bind_address_no_port ||
405 (flags & BIND_FORCE_ADDRESS_NO_PORT))) {
406 if (sk->sk_prot->get_port(sk, snum)) {
407 sk->sk_ipv6only = saved_ipv6only;
408 inet_reset_saddr(sk);
409 err = -EADDRINUSE;
410 goto out;
411 }
412 if (!(flags & BIND_FROM_BPF)) {
413 err = BPF_CGROUP_RUN_PROG_INET6_POST_BIND(sk);
414 if (err) {
415 sk->sk_ipv6only = saved_ipv6only;
416 inet_reset_saddr(sk);
417 if (sk->sk_prot->put_port)
418 sk->sk_prot->put_port(sk);
419 goto out;
420 }
421 }
422 }
423
424 if (addr_type != IPV6_ADDR_ANY)
425 sk->sk_userlocks |= SOCK_BINDADDR_LOCK;
426 if (snum)
427 sk->sk_userlocks |= SOCK_BINDPORT_LOCK;
428 inet->inet_sport = htons(inet->inet_num);
429 inet->inet_dport = 0;
430 inet->inet_daddr = 0;
431 out:
432 if (flags & BIND_WITH_LOCK)
433 release_sock(sk);
434 return err;
435 out_unlock:
436 rcu_read_unlock();
437 goto out;
438 }
439
440 /* bind for INET6 API */
inet6_bind(struct socket * sock,struct sockaddr * uaddr,int addr_len)441 int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
442 {
443 struct sock *sk = sock->sk;
444 u32 flags = BIND_WITH_LOCK;
445 const struct proto *prot;
446 int err = 0;
447
448 /* IPV6_ADDRFORM can change sk->sk_prot under us. */
449 prot = READ_ONCE(sk->sk_prot);
450 /* If the socket has its own bind function then use it. */
451 if (prot->bind)
452 return prot->bind(sk, uaddr, addr_len);
453
454 if (addr_len < SIN6_LEN_RFC2133)
455 return -EINVAL;
456
457 /* BPF prog is run before any checks are done so that if the prog
458 * changes context in a wrong way it will be caught.
459 */
460 err = BPF_CGROUP_RUN_PROG_INET_BIND_LOCK(sk, uaddr,
461 CGROUP_INET6_BIND, &flags);
462 if (err)
463 return err;
464
465 return __inet6_bind(sk, uaddr, addr_len, flags);
466 }
467 EXPORT_SYMBOL(inet6_bind);
468
inet6_release(struct socket * sock)469 int inet6_release(struct socket *sock)
470 {
471 struct sock *sk = sock->sk;
472
473 if (!sk)
474 return -EINVAL;
475
476 /* Free mc lists */
477 ipv6_sock_mc_close(sk);
478
479 /* Free ac lists */
480 ipv6_sock_ac_close(sk);
481
482 return inet_release(sock);
483 }
484 EXPORT_SYMBOL(inet6_release);
485
inet6_destroy_sock(struct sock * sk)486 void inet6_destroy_sock(struct sock *sk)
487 {
488 struct ipv6_pinfo *np = inet6_sk(sk);
489 struct sk_buff *skb;
490 struct ipv6_txoptions *opt;
491
492 /* Release rx options */
493
494 skb = xchg(&np->pktoptions, NULL);
495 kfree_skb(skb);
496
497 skb = xchg(&np->rxpmtu, NULL);
498 kfree_skb(skb);
499
500 /* Free flowlabels */
501 fl6_free_socklist(sk);
502
503 /* Free tx options */
504
505 opt = xchg((__force struct ipv6_txoptions **)&np->opt, NULL);
506 if (opt) {
507 atomic_sub(opt->tot_len, &sk->sk_omem_alloc);
508 txopt_put(opt);
509 }
510 }
511 EXPORT_SYMBOL_GPL(inet6_destroy_sock);
512
513 /*
514 * This does both peername and sockname.
515 */
inet6_getname(struct socket * sock,struct sockaddr * uaddr,int peer)516 int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
517 int peer)
518 {
519 struct sockaddr_in6 *sin = (struct sockaddr_in6 *)uaddr;
520 struct sock *sk = sock->sk;
521 struct inet_sock *inet = inet_sk(sk);
522 struct ipv6_pinfo *np = inet6_sk(sk);
523
524 sin->sin6_family = AF_INET6;
525 sin->sin6_flowinfo = 0;
526 sin->sin6_scope_id = 0;
527 lock_sock(sk);
528 if (peer) {
529 if (!inet->inet_dport ||
530 (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) &&
531 peer == 1)) {
532 release_sock(sk);
533 return -ENOTCONN;
534 }
535 sin->sin6_port = inet->inet_dport;
536 sin->sin6_addr = sk->sk_v6_daddr;
537 if (np->sndflow)
538 sin->sin6_flowinfo = np->flow_label;
539 BPF_CGROUP_RUN_SA_PROG(sk, (struct sockaddr *)sin,
540 CGROUP_INET6_GETPEERNAME);
541 } else {
542 if (ipv6_addr_any(&sk->sk_v6_rcv_saddr))
543 sin->sin6_addr = np->saddr;
544 else
545 sin->sin6_addr = sk->sk_v6_rcv_saddr;
546 sin->sin6_port = inet->inet_sport;
547 BPF_CGROUP_RUN_SA_PROG(sk, (struct sockaddr *)sin,
548 CGROUP_INET6_GETSOCKNAME);
549 }
550 sin->sin6_scope_id = ipv6_iface_scope_id(&sin->sin6_addr,
551 sk->sk_bound_dev_if);
552 release_sock(sk);
553 return sizeof(*sin);
554 }
555 EXPORT_SYMBOL(inet6_getname);
556
inet6_ioctl(struct socket * sock,unsigned int cmd,unsigned long arg)557 int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
558 {
559 void __user *argp = (void __user *)arg;
560 struct sock *sk = sock->sk;
561 struct net *net = sock_net(sk);
562 const struct proto *prot;
563
564 switch (cmd) {
565 case SIOCADDRT:
566 case SIOCDELRT: {
567 struct in6_rtmsg rtmsg;
568
569 if (copy_from_user(&rtmsg, argp, sizeof(rtmsg)))
570 return -EFAULT;
571 return ipv6_route_ioctl(net, cmd, &rtmsg);
572 }
573 case SIOCSIFADDR:
574 return addrconf_add_ifaddr(net, argp);
575 case SIOCDIFADDR:
576 return addrconf_del_ifaddr(net, argp);
577 case SIOCSIFDSTADDR:
578 return addrconf_set_dstaddr(net, argp);
579 default:
580 /* IPV6_ADDRFORM can change sk->sk_prot under us. */
581 prot = READ_ONCE(sk->sk_prot);
582 if (!prot->ioctl)
583 return -ENOIOCTLCMD;
584 return prot->ioctl(sk, cmd, arg);
585 }
586 /*NOTREACHED*/
587 return 0;
588 }
589 EXPORT_SYMBOL(inet6_ioctl);
590
591 #ifdef CONFIG_COMPAT
592 struct compat_in6_rtmsg {
593 struct in6_addr rtmsg_dst;
594 struct in6_addr rtmsg_src;
595 struct in6_addr rtmsg_gateway;
596 u32 rtmsg_type;
597 u16 rtmsg_dst_len;
598 u16 rtmsg_src_len;
599 u32 rtmsg_metric;
600 u32 rtmsg_info;
601 u32 rtmsg_flags;
602 s32 rtmsg_ifindex;
603 };
604
inet6_compat_routing_ioctl(struct sock * sk,unsigned int cmd,struct compat_in6_rtmsg __user * ur)605 static int inet6_compat_routing_ioctl(struct sock *sk, unsigned int cmd,
606 struct compat_in6_rtmsg __user *ur)
607 {
608 struct in6_rtmsg rt;
609
610 if (copy_from_user(&rt.rtmsg_dst, &ur->rtmsg_dst,
611 3 * sizeof(struct in6_addr)) ||
612 get_user(rt.rtmsg_type, &ur->rtmsg_type) ||
613 get_user(rt.rtmsg_dst_len, &ur->rtmsg_dst_len) ||
614 get_user(rt.rtmsg_src_len, &ur->rtmsg_src_len) ||
615 get_user(rt.rtmsg_metric, &ur->rtmsg_metric) ||
616 get_user(rt.rtmsg_info, &ur->rtmsg_info) ||
617 get_user(rt.rtmsg_flags, &ur->rtmsg_flags) ||
618 get_user(rt.rtmsg_ifindex, &ur->rtmsg_ifindex))
619 return -EFAULT;
620
621
622 return ipv6_route_ioctl(sock_net(sk), cmd, &rt);
623 }
624
inet6_compat_ioctl(struct socket * sock,unsigned int cmd,unsigned long arg)625 int inet6_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
626 {
627 void __user *argp = compat_ptr(arg);
628 struct sock *sk = sock->sk;
629
630 switch (cmd) {
631 case SIOCADDRT:
632 case SIOCDELRT:
633 return inet6_compat_routing_ioctl(sk, cmd, argp);
634 default:
635 return -ENOIOCTLCMD;
636 }
637 }
638 EXPORT_SYMBOL_GPL(inet6_compat_ioctl);
639 #endif /* CONFIG_COMPAT */
640
641 INDIRECT_CALLABLE_DECLARE(int udpv6_sendmsg(struct sock *, struct msghdr *,
642 size_t));
inet6_sendmsg(struct socket * sock,struct msghdr * msg,size_t size)643 int inet6_sendmsg(struct socket *sock, struct msghdr *msg, size_t size)
644 {
645 struct sock *sk = sock->sk;
646 const struct proto *prot;
647
648 if (unlikely(inet_send_prepare(sk)))
649 return -EAGAIN;
650
651 /* IPV6_ADDRFORM can change sk->sk_prot under us. */
652 prot = READ_ONCE(sk->sk_prot);
653 return INDIRECT_CALL_2(prot->sendmsg, tcp_sendmsg, udpv6_sendmsg,
654 sk, msg, size);
655 }
656
657 INDIRECT_CALLABLE_DECLARE(int udpv6_recvmsg(struct sock *, struct msghdr *,
658 size_t, int, int *));
inet6_recvmsg(struct socket * sock,struct msghdr * msg,size_t size,int flags)659 int inet6_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
660 int flags)
661 {
662 struct sock *sk = sock->sk;
663 const struct proto *prot;
664 int addr_len = 0;
665 int err;
666
667 if (likely(!(flags & MSG_ERRQUEUE)))
668 sock_rps_record_flow(sk);
669
670 /* IPV6_ADDRFORM can change sk->sk_prot under us. */
671 prot = READ_ONCE(sk->sk_prot);
672 err = INDIRECT_CALL_2(prot->recvmsg, tcp_recvmsg, udpv6_recvmsg,
673 sk, msg, size, flags, &addr_len);
674 if (err >= 0)
675 msg->msg_namelen = addr_len;
676 return err;
677 }
678
679 const struct proto_ops inet6_stream_ops = {
680 .family = PF_INET6,
681 .owner = THIS_MODULE,
682 .release = inet6_release,
683 .bind = inet6_bind,
684 .connect = inet_stream_connect, /* ok */
685 .socketpair = sock_no_socketpair, /* a do nothing */
686 .accept = inet_accept, /* ok */
687 .getname = inet6_getname,
688 .poll = tcp_poll, /* ok */
689 .ioctl = inet6_ioctl, /* must change */
690 .gettstamp = sock_gettstamp,
691 .listen = inet_listen, /* ok */
692 .shutdown = inet_shutdown, /* ok */
693 .setsockopt = sock_common_setsockopt, /* ok */
694 .getsockopt = sock_common_getsockopt, /* ok */
695 .sendmsg = inet6_sendmsg, /* retpoline's sake */
696 .recvmsg = inet6_recvmsg, /* retpoline's sake */
697 #ifdef CONFIG_MMU
698 .mmap = tcp_mmap,
699 #endif
700 .sendpage = inet_sendpage,
701 .sendmsg_locked = tcp_sendmsg_locked,
702 .sendpage_locked = tcp_sendpage_locked,
703 .splice_read = tcp_splice_read,
704 .read_sock = tcp_read_sock,
705 .peek_len = tcp_peek_len,
706 #ifdef CONFIG_COMPAT
707 .compat_ioctl = inet6_compat_ioctl,
708 #endif
709 .set_rcvlowat = tcp_set_rcvlowat,
710 };
711
712 const struct proto_ops inet6_dgram_ops = {
713 .family = PF_INET6,
714 .owner = THIS_MODULE,
715 .release = inet6_release,
716 .bind = inet6_bind,
717 .connect = inet_dgram_connect, /* ok */
718 .socketpair = sock_no_socketpair, /* a do nothing */
719 .accept = sock_no_accept, /* a do nothing */
720 .getname = inet6_getname,
721 .poll = udp_poll, /* ok */
722 .ioctl = inet6_ioctl, /* must change */
723 .gettstamp = sock_gettstamp,
724 .listen = sock_no_listen, /* ok */
725 .shutdown = inet_shutdown, /* ok */
726 .setsockopt = sock_common_setsockopt, /* ok */
727 .getsockopt = sock_common_getsockopt, /* ok */
728 .sendmsg = inet6_sendmsg, /* retpoline's sake */
729 .recvmsg = inet6_recvmsg, /* retpoline's sake */
730 .read_sock = udp_read_sock,
731 .mmap = sock_no_mmap,
732 .sendpage = sock_no_sendpage,
733 .set_peek_off = sk_set_peek_off,
734 #ifdef CONFIG_COMPAT
735 .compat_ioctl = inet6_compat_ioctl,
736 #endif
737 };
738
739 static const struct net_proto_family inet6_family_ops = {
740 .family = PF_INET6,
741 .create = inet6_create,
742 .owner = THIS_MODULE,
743 };
744
inet6_register_protosw(struct inet_protosw * p)745 int inet6_register_protosw(struct inet_protosw *p)
746 {
747 struct list_head *lh;
748 struct inet_protosw *answer;
749 struct list_head *last_perm;
750 int protocol = p->protocol;
751 int ret;
752
753 spin_lock_bh(&inetsw6_lock);
754
755 ret = -EINVAL;
756 if (p->type >= SOCK_MAX)
757 goto out_illegal;
758
759 /* If we are trying to override a permanent protocol, bail. */
760 answer = NULL;
761 ret = -EPERM;
762 last_perm = &inetsw6[p->type];
763 list_for_each(lh, &inetsw6[p->type]) {
764 answer = list_entry(lh, struct inet_protosw, list);
765
766 /* Check only the non-wild match. */
767 if (INET_PROTOSW_PERMANENT & answer->flags) {
768 if (protocol == answer->protocol)
769 break;
770 last_perm = lh;
771 }
772
773 answer = NULL;
774 }
775 if (answer)
776 goto out_permanent;
777
778 /* Add the new entry after the last permanent entry if any, so that
779 * the new entry does not override a permanent entry when matched with
780 * a wild-card protocol. But it is allowed to override any existing
781 * non-permanent entry. This means that when we remove this entry, the
782 * system automatically returns to the old behavior.
783 */
784 list_add_rcu(&p->list, last_perm);
785 ret = 0;
786 out:
787 spin_unlock_bh(&inetsw6_lock);
788 return ret;
789
790 out_permanent:
791 pr_err("Attempt to override permanent protocol %d\n", protocol);
792 goto out;
793
794 out_illegal:
795 pr_err("Ignoring attempt to register invalid socket type %d\n",
796 p->type);
797 goto out;
798 }
799 EXPORT_SYMBOL(inet6_register_protosw);
800
801 void
inet6_unregister_protosw(struct inet_protosw * p)802 inet6_unregister_protosw(struct inet_protosw *p)
803 {
804 if (INET_PROTOSW_PERMANENT & p->flags) {
805 pr_err("Attempt to unregister permanent protocol %d\n",
806 p->protocol);
807 } else {
808 spin_lock_bh(&inetsw6_lock);
809 list_del_rcu(&p->list);
810 spin_unlock_bh(&inetsw6_lock);
811
812 synchronize_net();
813 }
814 }
815 EXPORT_SYMBOL(inet6_unregister_protosw);
816
inet6_sk_rebuild_header(struct sock * sk)817 int inet6_sk_rebuild_header(struct sock *sk)
818 {
819 struct ipv6_pinfo *np = inet6_sk(sk);
820 struct dst_entry *dst;
821
822 dst = __sk_dst_check(sk, np->dst_cookie);
823
824 if (!dst) {
825 struct inet_sock *inet = inet_sk(sk);
826 struct in6_addr *final_p, final;
827 struct flowi6 fl6;
828
829 memset(&fl6, 0, sizeof(fl6));
830 fl6.flowi6_proto = sk->sk_protocol;
831 fl6.daddr = sk->sk_v6_daddr;
832 fl6.saddr = np->saddr;
833 fl6.flowlabel = np->flow_label;
834 fl6.flowi6_oif = sk->sk_bound_dev_if;
835 fl6.flowi6_mark = sk->sk_mark;
836 fl6.fl6_dport = inet->inet_dport;
837 fl6.fl6_sport = inet->inet_sport;
838 fl6.flowi6_uid = sk->sk_uid;
839 security_sk_classify_flow(sk, flowi6_to_flowi_common(&fl6));
840
841 rcu_read_lock();
842 final_p = fl6_update_dst(&fl6, rcu_dereference(np->opt),
843 &final);
844 rcu_read_unlock();
845
846 dst = ip6_dst_lookup_flow(sock_net(sk), sk, &fl6, final_p);
847 if (IS_ERR(dst)) {
848 sk->sk_route_caps = 0;
849 sk->sk_err_soft = -PTR_ERR(dst);
850 return PTR_ERR(dst);
851 }
852
853 ip6_dst_store(sk, dst, NULL, NULL);
854 }
855
856 return 0;
857 }
858 EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header);
859
ipv6_opt_accepted(const struct sock * sk,const struct sk_buff * skb,const struct inet6_skb_parm * opt)860 bool ipv6_opt_accepted(const struct sock *sk, const struct sk_buff *skb,
861 const struct inet6_skb_parm *opt)
862 {
863 const struct ipv6_pinfo *np = inet6_sk(sk);
864
865 if (np->rxopt.all) {
866 if (((opt->flags & IP6SKB_HOPBYHOP) &&
867 (np->rxopt.bits.hopopts || np->rxopt.bits.ohopopts)) ||
868 (ip6_flowinfo((struct ipv6hdr *) skb_network_header(skb)) &&
869 np->rxopt.bits.rxflow) ||
870 (opt->srcrt && (np->rxopt.bits.srcrt ||
871 np->rxopt.bits.osrcrt)) ||
872 ((opt->dst1 || opt->dst0) &&
873 (np->rxopt.bits.dstopts || np->rxopt.bits.odstopts)))
874 return true;
875 }
876 return false;
877 }
878 EXPORT_SYMBOL_GPL(ipv6_opt_accepted);
879
880 static struct packet_type ipv6_packet_type __read_mostly = {
881 .type = cpu_to_be16(ETH_P_IPV6),
882 .func = ipv6_rcv,
883 .list_func = ipv6_list_rcv,
884 };
885
ipv6_packet_init(void)886 static int __init ipv6_packet_init(void)
887 {
888 dev_add_pack(&ipv6_packet_type);
889 return 0;
890 }
891
ipv6_packet_cleanup(void)892 static void ipv6_packet_cleanup(void)
893 {
894 dev_remove_pack(&ipv6_packet_type);
895 }
896
ipv6_init_mibs(struct net * net)897 static int __net_init ipv6_init_mibs(struct net *net)
898 {
899 int i;
900
901 net->mib.udp_stats_in6 = alloc_percpu(struct udp_mib);
902 if (!net->mib.udp_stats_in6)
903 return -ENOMEM;
904 net->mib.udplite_stats_in6 = alloc_percpu(struct udp_mib);
905 if (!net->mib.udplite_stats_in6)
906 goto err_udplite_mib;
907 net->mib.ipv6_statistics = alloc_percpu(struct ipstats_mib);
908 if (!net->mib.ipv6_statistics)
909 goto err_ip_mib;
910
911 for_each_possible_cpu(i) {
912 struct ipstats_mib *af_inet6_stats;
913 af_inet6_stats = per_cpu_ptr(net->mib.ipv6_statistics, i);
914 u64_stats_init(&af_inet6_stats->syncp);
915 }
916
917
918 net->mib.icmpv6_statistics = alloc_percpu(struct icmpv6_mib);
919 if (!net->mib.icmpv6_statistics)
920 goto err_icmp_mib;
921 net->mib.icmpv6msg_statistics = kzalloc(sizeof(struct icmpv6msg_mib),
922 GFP_KERNEL);
923 if (!net->mib.icmpv6msg_statistics)
924 goto err_icmpmsg_mib;
925 return 0;
926
927 err_icmpmsg_mib:
928 free_percpu(net->mib.icmpv6_statistics);
929 err_icmp_mib:
930 free_percpu(net->mib.ipv6_statistics);
931 err_ip_mib:
932 free_percpu(net->mib.udplite_stats_in6);
933 err_udplite_mib:
934 free_percpu(net->mib.udp_stats_in6);
935 return -ENOMEM;
936 }
937
ipv6_cleanup_mibs(struct net * net)938 static void ipv6_cleanup_mibs(struct net *net)
939 {
940 free_percpu(net->mib.udp_stats_in6);
941 free_percpu(net->mib.udplite_stats_in6);
942 free_percpu(net->mib.ipv6_statistics);
943 free_percpu(net->mib.icmpv6_statistics);
944 kfree(net->mib.icmpv6msg_statistics);
945 }
946
inet6_net_init(struct net * net)947 static int __net_init inet6_net_init(struct net *net)
948 {
949 int err = 0;
950
951 net->ipv6.sysctl.bindv6only = 0;
952 net->ipv6.sysctl.icmpv6_time = 1*HZ;
953 net->ipv6.sysctl.icmpv6_echo_ignore_all = 0;
954 net->ipv6.sysctl.icmpv6_echo_ignore_multicast = 0;
955 net->ipv6.sysctl.icmpv6_echo_ignore_anycast = 0;
956
957 /* By default, rate limit error messages.
958 * Except for pmtu discovery, it would break it.
959 * proc_do_large_bitmap needs pointer to the bitmap.
960 */
961 bitmap_set(net->ipv6.sysctl.icmpv6_ratemask, 0, ICMPV6_ERRMSG_MAX + 1);
962 bitmap_clear(net->ipv6.sysctl.icmpv6_ratemask, ICMPV6_PKT_TOOBIG, 1);
963 net->ipv6.sysctl.icmpv6_ratemask_ptr = net->ipv6.sysctl.icmpv6_ratemask;
964
965 net->ipv6.sysctl.flowlabel_consistency = 1;
966 net->ipv6.sysctl.auto_flowlabels = IP6_DEFAULT_AUTO_FLOW_LABELS;
967 net->ipv6.sysctl.idgen_retries = 3;
968 net->ipv6.sysctl.idgen_delay = 1 * HZ;
969 net->ipv6.sysctl.flowlabel_state_ranges = 0;
970 net->ipv6.sysctl.max_dst_opts_cnt = IP6_DEFAULT_MAX_DST_OPTS_CNT;
971 net->ipv6.sysctl.max_hbh_opts_cnt = IP6_DEFAULT_MAX_HBH_OPTS_CNT;
972 net->ipv6.sysctl.max_dst_opts_len = IP6_DEFAULT_MAX_DST_OPTS_LEN;
973 net->ipv6.sysctl.max_hbh_opts_len = IP6_DEFAULT_MAX_HBH_OPTS_LEN;
974 net->ipv6.sysctl.fib_notify_on_flag_change = 0;
975 atomic_set(&net->ipv6.fib6_sernum, 1);
976
977 net->ipv6.sysctl.ioam6_id = IOAM6_DEFAULT_ID;
978 net->ipv6.sysctl.ioam6_id_wide = IOAM6_DEFAULT_ID_WIDE;
979
980 err = ipv6_init_mibs(net);
981 if (err)
982 return err;
983 #ifdef CONFIG_PROC_FS
984 err = udp6_proc_init(net);
985 if (err)
986 goto out;
987 err = tcp6_proc_init(net);
988 if (err)
989 goto proc_tcp6_fail;
990 err = ac6_proc_init(net);
991 if (err)
992 goto proc_ac6_fail;
993 #endif
994 return err;
995
996 #ifdef CONFIG_PROC_FS
997 proc_ac6_fail:
998 tcp6_proc_exit(net);
999 proc_tcp6_fail:
1000 udp6_proc_exit(net);
1001 out:
1002 ipv6_cleanup_mibs(net);
1003 return err;
1004 #endif
1005 }
1006
inet6_net_exit(struct net * net)1007 static void __net_exit inet6_net_exit(struct net *net)
1008 {
1009 #ifdef CONFIG_PROC_FS
1010 udp6_proc_exit(net);
1011 tcp6_proc_exit(net);
1012 ac6_proc_exit(net);
1013 #endif
1014 ipv6_cleanup_mibs(net);
1015 }
1016
1017 static struct pernet_operations inet6_net_ops = {
1018 .init = inet6_net_init,
1019 .exit = inet6_net_exit,
1020 };
1021
ipv6_route_input(struct sk_buff * skb)1022 static int ipv6_route_input(struct sk_buff *skb)
1023 {
1024 ip6_route_input(skb);
1025 return skb_dst(skb)->error;
1026 }
1027
1028 static const struct ipv6_stub ipv6_stub_impl = {
1029 .ipv6_sock_mc_join = ipv6_sock_mc_join,
1030 .ipv6_sock_mc_drop = ipv6_sock_mc_drop,
1031 .ipv6_dst_lookup_flow = ip6_dst_lookup_flow,
1032 .ipv6_route_input = ipv6_route_input,
1033 .fib6_get_table = fib6_get_table,
1034 .fib6_table_lookup = fib6_table_lookup,
1035 .fib6_lookup = fib6_lookup,
1036 .fib6_select_path = fib6_select_path,
1037 .ip6_mtu_from_fib6 = ip6_mtu_from_fib6,
1038 .fib6_nh_init = fib6_nh_init,
1039 .fib6_nh_release = fib6_nh_release,
1040 .fib6_nh_release_dsts = fib6_nh_release_dsts,
1041 .fib6_update_sernum = fib6_update_sernum_stub,
1042 .fib6_rt_update = fib6_rt_update,
1043 .ip6_del_rt = ip6_del_rt,
1044 .udpv6_encap_enable = udpv6_encap_enable,
1045 .ndisc_send_na = ndisc_send_na,
1046 #if IS_ENABLED(CONFIG_XFRM)
1047 .xfrm6_local_rxpmtu = xfrm6_local_rxpmtu,
1048 .xfrm6_udp_encap_rcv = xfrm6_udp_encap_rcv,
1049 .xfrm6_rcv_encap = xfrm6_rcv_encap,
1050 #endif
1051 .nd_tbl = &nd_tbl,
1052 .ipv6_fragment = ip6_fragment,
1053 .ipv6_dev_find = ipv6_dev_find,
1054 };
1055
1056 static const struct ipv6_bpf_stub ipv6_bpf_stub_impl = {
1057 .inet6_bind = __inet6_bind,
1058 .udp6_lib_lookup = __udp6_lib_lookup,
1059 };
1060
inet6_init(void)1061 static int __init inet6_init(void)
1062 {
1063 struct list_head *r;
1064 int err = 0;
1065
1066 sock_skb_cb_check_size(sizeof(struct inet6_skb_parm));
1067
1068 /* Register the socket-side information for inet6_create. */
1069 for (r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r)
1070 INIT_LIST_HEAD(r);
1071
1072 if (disable_ipv6_mod) {
1073 pr_info("Loaded, but administratively disabled, reboot required to enable\n");
1074 goto out;
1075 }
1076
1077 raw_hashinfo_init(&raw_v6_hashinfo);
1078
1079 err = proto_register(&tcpv6_prot, 1);
1080 if (err)
1081 goto out;
1082
1083 err = proto_register(&udpv6_prot, 1);
1084 if (err)
1085 goto out_unregister_tcp_proto;
1086
1087 err = proto_register(&udplitev6_prot, 1);
1088 if (err)
1089 goto out_unregister_udp_proto;
1090
1091 err = proto_register(&rawv6_prot, 1);
1092 if (err)
1093 goto out_unregister_udplite_proto;
1094
1095 err = proto_register(&pingv6_prot, 1);
1096 if (err)
1097 goto out_unregister_raw_proto;
1098
1099 /* We MUST register RAW sockets before we create the ICMP6,
1100 * IGMP6, or NDISC control sockets.
1101 */
1102 err = rawv6_init();
1103 if (err)
1104 goto out_unregister_ping_proto;
1105
1106 /* Register the family here so that the init calls below will
1107 * be able to create sockets. (?? is this dangerous ??)
1108 */
1109 err = sock_register(&inet6_family_ops);
1110 if (err)
1111 goto out_sock_register_fail;
1112
1113 /*
1114 * ipngwg API draft makes clear that the correct semantics
1115 * for TCP and UDP is to consider one TCP and UDP instance
1116 * in a host available by both INET and INET6 APIs and
1117 * able to communicate via both network protocols.
1118 */
1119
1120 err = register_pernet_subsys(&inet6_net_ops);
1121 if (err)
1122 goto register_pernet_fail;
1123 err = ip6_mr_init();
1124 if (err)
1125 goto ipmr_fail;
1126 err = icmpv6_init();
1127 if (err)
1128 goto icmp_fail;
1129 err = ndisc_init();
1130 if (err)
1131 goto ndisc_fail;
1132 err = igmp6_init();
1133 if (err)
1134 goto igmp_fail;
1135
1136 err = ipv6_netfilter_init();
1137 if (err)
1138 goto netfilter_fail;
1139 /* Create /proc/foo6 entries. */
1140 #ifdef CONFIG_PROC_FS
1141 err = -ENOMEM;
1142 if (raw6_proc_init())
1143 goto proc_raw6_fail;
1144 if (udplite6_proc_init())
1145 goto proc_udplite6_fail;
1146 if (ipv6_misc_proc_init())
1147 goto proc_misc6_fail;
1148 if (if6_proc_init())
1149 goto proc_if6_fail;
1150 #endif
1151 err = ip6_route_init();
1152 if (err)
1153 goto ip6_route_fail;
1154 err = ndisc_late_init();
1155 if (err)
1156 goto ndisc_late_fail;
1157 err = ip6_flowlabel_init();
1158 if (err)
1159 goto ip6_flowlabel_fail;
1160 err = ipv6_anycast_init();
1161 if (err)
1162 goto ipv6_anycast_fail;
1163 err = addrconf_init();
1164 if (err)
1165 goto addrconf_fail;
1166
1167 /* Init v6 extension headers. */
1168 err = ipv6_exthdrs_init();
1169 if (err)
1170 goto ipv6_exthdrs_fail;
1171
1172 err = ipv6_frag_init();
1173 if (err)
1174 goto ipv6_frag_fail;
1175
1176 /* Init v6 transport protocols. */
1177 err = udpv6_init();
1178 if (err)
1179 goto udpv6_fail;
1180
1181 err = udplitev6_init();
1182 if (err)
1183 goto udplitev6_fail;
1184
1185 err = udpv6_offload_init();
1186 if (err)
1187 goto udpv6_offload_fail;
1188
1189 err = tcpv6_init();
1190 if (err)
1191 goto tcpv6_fail;
1192
1193 err = ipv6_packet_init();
1194 if (err)
1195 goto ipv6_packet_fail;
1196
1197 err = pingv6_init();
1198 if (err)
1199 goto pingv6_fail;
1200
1201 err = calipso_init();
1202 if (err)
1203 goto calipso_fail;
1204
1205 err = seg6_init();
1206 if (err)
1207 goto seg6_fail;
1208
1209 err = rpl_init();
1210 if (err)
1211 goto rpl_fail;
1212
1213 err = ioam6_init();
1214 if (err)
1215 goto ioam6_fail;
1216
1217 err = igmp6_late_init();
1218 if (err)
1219 goto igmp6_late_err;
1220
1221 #ifdef CONFIG_SYSCTL
1222 err = ipv6_sysctl_register();
1223 if (err)
1224 goto sysctl_fail;
1225 #endif
1226
1227 /* ensure that ipv6 stubs are visible only after ipv6 is ready */
1228 wmb();
1229 ipv6_stub = &ipv6_stub_impl;
1230 ipv6_bpf_stub = &ipv6_bpf_stub_impl;
1231 out:
1232 return err;
1233
1234 #ifdef CONFIG_SYSCTL
1235 sysctl_fail:
1236 igmp6_late_cleanup();
1237 #endif
1238 igmp6_late_err:
1239 ioam6_exit();
1240 ioam6_fail:
1241 rpl_exit();
1242 rpl_fail:
1243 seg6_exit();
1244 seg6_fail:
1245 calipso_exit();
1246 calipso_fail:
1247 pingv6_exit();
1248 pingv6_fail:
1249 ipv6_packet_cleanup();
1250 ipv6_packet_fail:
1251 tcpv6_exit();
1252 tcpv6_fail:
1253 udpv6_offload_exit();
1254 udpv6_offload_fail:
1255 udplitev6_exit();
1256 udplitev6_fail:
1257 udpv6_exit();
1258 udpv6_fail:
1259 ipv6_frag_exit();
1260 ipv6_frag_fail:
1261 ipv6_exthdrs_exit();
1262 ipv6_exthdrs_fail:
1263 addrconf_cleanup();
1264 addrconf_fail:
1265 ipv6_anycast_cleanup();
1266 ipv6_anycast_fail:
1267 ip6_flowlabel_cleanup();
1268 ip6_flowlabel_fail:
1269 ndisc_late_cleanup();
1270 ndisc_late_fail:
1271 ip6_route_cleanup();
1272 ip6_route_fail:
1273 #ifdef CONFIG_PROC_FS
1274 if6_proc_exit();
1275 proc_if6_fail:
1276 ipv6_misc_proc_exit();
1277 proc_misc6_fail:
1278 udplite6_proc_exit();
1279 proc_udplite6_fail:
1280 raw6_proc_exit();
1281 proc_raw6_fail:
1282 #endif
1283 ipv6_netfilter_fini();
1284 netfilter_fail:
1285 igmp6_cleanup();
1286 igmp_fail:
1287 ndisc_cleanup();
1288 ndisc_fail:
1289 icmpv6_cleanup();
1290 icmp_fail:
1291 ip6_mr_cleanup();
1292 ipmr_fail:
1293 unregister_pernet_subsys(&inet6_net_ops);
1294 register_pernet_fail:
1295 sock_unregister(PF_INET6);
1296 rtnl_unregister_all(PF_INET6);
1297 out_sock_register_fail:
1298 rawv6_exit();
1299 out_unregister_ping_proto:
1300 proto_unregister(&pingv6_prot);
1301 out_unregister_raw_proto:
1302 proto_unregister(&rawv6_prot);
1303 out_unregister_udplite_proto:
1304 proto_unregister(&udplitev6_prot);
1305 out_unregister_udp_proto:
1306 proto_unregister(&udpv6_prot);
1307 out_unregister_tcp_proto:
1308 proto_unregister(&tcpv6_prot);
1309 goto out;
1310 }
1311 module_init(inet6_init);
1312
1313 MODULE_ALIAS_NETPROTO(PF_INET6);
1314