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_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
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 inet = inet_sk(sk);
202 inet->is_icsk = (INET_PROTOSW_ICSK & answer_flags) != 0;
203
204 if (SOCK_RAW == sock->type) {
205 inet->inet_num = protocol;
206 if (IPPROTO_RAW == protocol)
207 inet->hdrincl = 1;
208 }
209
210 sk->sk_destruct = inet6_sock_destruct;
211 sk->sk_family = PF_INET6;
212 sk->sk_protocol = protocol;
213
214 sk->sk_backlog_rcv = answer->prot->backlog_rcv;
215
216 inet_sk(sk)->pinet6 = np = inet6_sk_generic(sk);
217 np->hop_limit = -1;
218 np->mcast_hops = IPV6_DEFAULT_MCASTHOPS;
219 np->mc_loop = 1;
220 np->mc_all = 1;
221 np->pmtudisc = IPV6_PMTUDISC_WANT;
222 np->repflow = net->ipv6.sysctl.flowlabel_reflect & FLOWLABEL_REFLECT_ESTABLISHED;
223 sk->sk_ipv6only = net->ipv6.sysctl.bindv6only;
224
225 /* Init the ipv4 part of the socket since we can have sockets
226 * using v6 API for ipv4.
227 */
228 inet->uc_ttl = -1;
229
230 inet->mc_loop = 1;
231 inet->mc_ttl = 1;
232 inet->mc_index = 0;
233 RCU_INIT_POINTER(inet->mc_list, NULL);
234 inet->rcv_tos = 0;
235
236 if (READ_ONCE(net->ipv4.sysctl_ip_no_pmtu_disc))
237 inet->pmtudisc = IP_PMTUDISC_DONT;
238 else
239 inet->pmtudisc = IP_PMTUDISC_WANT;
240 /*
241 * Increment only the relevant sk_prot->socks debug field, this changes
242 * the previous behaviour of incrementing both the equivalent to
243 * answer->prot->socks (inet6_sock_nr) and inet_sock_nr.
244 *
245 * This allows better debug granularity as we'll know exactly how many
246 * UDPv6, TCPv6, etc socks were allocated, not the sum of all IPv6
247 * transport protocol socks. -acme
248 */
249 sk_refcnt_debug_inc(sk);
250
251 if (inet->inet_num) {
252 /* It assumes that any protocol which allows
253 * the user to assign a number at socket
254 * creation time automatically shares.
255 */
256 inet->inet_sport = htons(inet->inet_num);
257 err = sk->sk_prot->hash(sk);
258 if (err) {
259 sk_common_release(sk);
260 goto out;
261 }
262 }
263 if (sk->sk_prot->init) {
264 err = sk->sk_prot->init(sk);
265 if (err) {
266 sk_common_release(sk);
267 goto out;
268 }
269 }
270
271 if (!kern) {
272 err = BPF_CGROUP_RUN_PROG_INET_SOCK(sk);
273 if (err) {
274 sk_common_release(sk);
275 goto out;
276 }
277 }
278 out:
279 return err;
280 out_rcu_unlock:
281 rcu_read_unlock();
282 goto out;
283 }
284
__inet6_bind(struct sock * sk,struct sockaddr * uaddr,int addr_len,u32 flags)285 static int __inet6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len,
286 u32 flags)
287 {
288 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)uaddr;
289 struct inet_sock *inet = inet_sk(sk);
290 struct ipv6_pinfo *np = inet6_sk(sk);
291 struct net *net = sock_net(sk);
292 __be32 v4addr = 0;
293 unsigned short snum;
294 bool saved_ipv6only;
295 int addr_type = 0;
296 int err = 0;
297
298 if (addr->sin6_family != AF_INET6)
299 return -EAFNOSUPPORT;
300
301 addr_type = ipv6_addr_type(&addr->sin6_addr);
302 if ((addr_type & IPV6_ADDR_MULTICAST) && sk->sk_type == SOCK_STREAM)
303 return -EINVAL;
304
305 snum = ntohs(addr->sin6_port);
306 if (!(flags & BIND_NO_CAP_NET_BIND_SERVICE) &&
307 snum && inet_port_requires_bind_service(net, snum) &&
308 !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE))
309 return -EACCES;
310
311 if (flags & BIND_WITH_LOCK)
312 lock_sock(sk);
313
314 /* Check these errors (active socket, double bind). */
315 if (sk->sk_state != TCP_CLOSE || inet->inet_num) {
316 err = -EINVAL;
317 goto out;
318 }
319
320 /* Check if the address belongs to the host. */
321 if (addr_type == IPV6_ADDR_MAPPED) {
322 struct net_device *dev = NULL;
323 int chk_addr_ret;
324
325 /* Binding to v4-mapped address on a v6-only socket
326 * makes no sense
327 */
328 if (ipv6_only_sock(sk)) {
329 err = -EINVAL;
330 goto out;
331 }
332
333 rcu_read_lock();
334 if (sk->sk_bound_dev_if) {
335 dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if);
336 if (!dev) {
337 err = -ENODEV;
338 goto out_unlock;
339 }
340 }
341
342 /* Reproduce AF_INET checks to make the bindings consistent */
343 v4addr = addr->sin6_addr.s6_addr32[3];
344 chk_addr_ret = inet_addr_type_dev_table(net, dev, v4addr);
345 rcu_read_unlock();
346
347 if (!inet_addr_valid_or_nonlocal(net, inet, v4addr,
348 chk_addr_ret)) {
349 err = -EADDRNOTAVAIL;
350 goto out;
351 }
352 } else {
353 if (addr_type != IPV6_ADDR_ANY) {
354 struct net_device *dev = NULL;
355
356 rcu_read_lock();
357 if (__ipv6_addr_needs_scope_id(addr_type)) {
358 if (addr_len >= sizeof(struct sockaddr_in6) &&
359 addr->sin6_scope_id) {
360 /* Override any existing binding, if another one
361 * is supplied by user.
362 */
363 sk->sk_bound_dev_if = addr->sin6_scope_id;
364 }
365
366 /* Binding to link-local address requires an interface */
367 if (!sk->sk_bound_dev_if) {
368 err = -EINVAL;
369 goto out_unlock;
370 }
371 }
372
373 if (sk->sk_bound_dev_if) {
374 dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if);
375 if (!dev) {
376 err = -ENODEV;
377 goto out_unlock;
378 }
379 }
380
381 /* ipv4 addr of the socket is invalid. Only the
382 * unspecified and mapped address have a v4 equivalent.
383 */
384 v4addr = LOOPBACK4_IPV6;
385 if (!(addr_type & IPV6_ADDR_MULTICAST)) {
386 if (!ipv6_can_nonlocal_bind(net, inet) &&
387 !ipv6_chk_addr(net, &addr->sin6_addr,
388 dev, 0)) {
389 err = -EADDRNOTAVAIL;
390 goto out_unlock;
391 }
392 }
393 rcu_read_unlock();
394 }
395 }
396
397 inet->inet_rcv_saddr = v4addr;
398 inet->inet_saddr = v4addr;
399
400 sk->sk_v6_rcv_saddr = addr->sin6_addr;
401
402 if (!(addr_type & IPV6_ADDR_MULTICAST))
403 np->saddr = addr->sin6_addr;
404
405 saved_ipv6only = sk->sk_ipv6only;
406 if (addr_type != IPV6_ADDR_ANY && addr_type != IPV6_ADDR_MAPPED)
407 sk->sk_ipv6only = 1;
408
409 /* Make sure we are allowed to bind here. */
410 if (snum || !(inet->bind_address_no_port ||
411 (flags & BIND_FORCE_ADDRESS_NO_PORT))) {
412 if (sk->sk_prot->get_port(sk, snum)) {
413 sk->sk_ipv6only = saved_ipv6only;
414 inet_reset_saddr(sk);
415 err = -EADDRINUSE;
416 goto out;
417 }
418 if (!(flags & BIND_FROM_BPF)) {
419 err = BPF_CGROUP_RUN_PROG_INET6_POST_BIND(sk);
420 if (err) {
421 sk->sk_ipv6only = saved_ipv6only;
422 inet_reset_saddr(sk);
423 if (sk->sk_prot->put_port)
424 sk->sk_prot->put_port(sk);
425 goto out;
426 }
427 }
428 }
429
430 if (addr_type != IPV6_ADDR_ANY)
431 sk->sk_userlocks |= SOCK_BINDADDR_LOCK;
432 if (snum)
433 sk->sk_userlocks |= SOCK_BINDPORT_LOCK;
434 inet->inet_sport = htons(inet->inet_num);
435 inet->inet_dport = 0;
436 inet->inet_daddr = 0;
437 out:
438 if (flags & BIND_WITH_LOCK)
439 release_sock(sk);
440 return err;
441 out_unlock:
442 rcu_read_unlock();
443 goto out;
444 }
445
446 /* bind for INET6 API */
inet6_bind(struct socket * sock,struct sockaddr * uaddr,int addr_len)447 int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
448 {
449 struct sock *sk = sock->sk;
450 u32 flags = BIND_WITH_LOCK;
451 const struct proto *prot;
452 int err = 0;
453
454 /* IPV6_ADDRFORM can change sk->sk_prot under us. */
455 prot = READ_ONCE(sk->sk_prot);
456 /* If the socket has its own bind function then use it. */
457 if (prot->bind)
458 return prot->bind(sk, uaddr, addr_len);
459
460 if (addr_len < SIN6_LEN_RFC2133)
461 return -EINVAL;
462
463 /* BPF prog is run before any checks are done so that if the prog
464 * changes context in a wrong way it will be caught.
465 */
466 err = BPF_CGROUP_RUN_PROG_INET_BIND_LOCK(sk, uaddr,
467 CGROUP_INET6_BIND, &flags);
468 if (err)
469 return err;
470
471 return __inet6_bind(sk, uaddr, addr_len, flags);
472 }
473 EXPORT_SYMBOL(inet6_bind);
474
inet6_release(struct socket * sock)475 int inet6_release(struct socket *sock)
476 {
477 struct sock *sk = sock->sk;
478
479 if (!sk)
480 return -EINVAL;
481
482 /* Free mc lists */
483 ipv6_sock_mc_close(sk);
484
485 /* Free ac lists */
486 ipv6_sock_ac_close(sk);
487
488 return inet_release(sock);
489 }
490 EXPORT_SYMBOL(inet6_release);
491
inet6_destroy_sock(struct sock * sk)492 void inet6_destroy_sock(struct sock *sk)
493 {
494 struct ipv6_pinfo *np = inet6_sk(sk);
495 struct sk_buff *skb;
496 struct ipv6_txoptions *opt;
497
498 /* Release rx options */
499
500 skb = xchg(&np->pktoptions, NULL);
501 kfree_skb(skb);
502
503 skb = xchg(&np->rxpmtu, NULL);
504 kfree_skb(skb);
505
506 /* Free flowlabels */
507 fl6_free_socklist(sk);
508
509 /* Free tx options */
510
511 opt = xchg((__force struct ipv6_txoptions **)&np->opt, NULL);
512 if (opt) {
513 atomic_sub(opt->tot_len, &sk->sk_omem_alloc);
514 txopt_put(opt);
515 }
516 }
517 EXPORT_SYMBOL_GPL(inet6_destroy_sock);
518
inet6_cleanup_sock(struct sock * sk)519 void inet6_cleanup_sock(struct sock *sk)
520 {
521 inet6_destroy_sock(sk);
522 }
523 EXPORT_SYMBOL_GPL(inet6_cleanup_sock);
524
525 /*
526 * This does both peername and sockname.
527 */
inet6_getname(struct socket * sock,struct sockaddr * uaddr,int peer)528 int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
529 int peer)
530 {
531 struct sockaddr_in6 *sin = (struct sockaddr_in6 *)uaddr;
532 struct sock *sk = sock->sk;
533 struct inet_sock *inet = inet_sk(sk);
534 struct ipv6_pinfo *np = inet6_sk(sk);
535
536 sin->sin6_family = AF_INET6;
537 sin->sin6_flowinfo = 0;
538 sin->sin6_scope_id = 0;
539 lock_sock(sk);
540 if (peer) {
541 if (!inet->inet_dport ||
542 (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) &&
543 peer == 1)) {
544 release_sock(sk);
545 return -ENOTCONN;
546 }
547 sin->sin6_port = inet->inet_dport;
548 sin->sin6_addr = sk->sk_v6_daddr;
549 if (np->sndflow)
550 sin->sin6_flowinfo = np->flow_label;
551 BPF_CGROUP_RUN_SA_PROG(sk, (struct sockaddr *)sin,
552 CGROUP_INET6_GETPEERNAME);
553 } else {
554 if (ipv6_addr_any(&sk->sk_v6_rcv_saddr))
555 sin->sin6_addr = np->saddr;
556 else
557 sin->sin6_addr = sk->sk_v6_rcv_saddr;
558 sin->sin6_port = inet->inet_sport;
559 BPF_CGROUP_RUN_SA_PROG(sk, (struct sockaddr *)sin,
560 CGROUP_INET6_GETSOCKNAME);
561 }
562 sin->sin6_scope_id = ipv6_iface_scope_id(&sin->sin6_addr,
563 sk->sk_bound_dev_if);
564 release_sock(sk);
565 return sizeof(*sin);
566 }
567 EXPORT_SYMBOL(inet6_getname);
568
inet6_ioctl(struct socket * sock,unsigned int cmd,unsigned long arg)569 int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
570 {
571 void __user *argp = (void __user *)arg;
572 struct sock *sk = sock->sk;
573 struct net *net = sock_net(sk);
574 const struct proto *prot;
575
576 switch (cmd) {
577 case SIOCADDRT:
578 case SIOCDELRT: {
579 struct in6_rtmsg rtmsg;
580
581 if (copy_from_user(&rtmsg, argp, sizeof(rtmsg)))
582 return -EFAULT;
583 return ipv6_route_ioctl(net, cmd, &rtmsg);
584 }
585 case SIOCSIFADDR:
586 return addrconf_add_ifaddr(net, argp);
587 case SIOCDIFADDR:
588 return addrconf_del_ifaddr(net, argp);
589 case SIOCSIFDSTADDR:
590 return addrconf_set_dstaddr(net, argp);
591 default:
592 /* IPV6_ADDRFORM can change sk->sk_prot under us. */
593 prot = READ_ONCE(sk->sk_prot);
594 if (!prot->ioctl)
595 return -ENOIOCTLCMD;
596 return 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 const struct proto *prot;
659
660 if (unlikely(inet_send_prepare(sk)))
661 return -EAGAIN;
662
663 /* IPV6_ADDRFORM can change sk->sk_prot under us. */
664 prot = READ_ONCE(sk->sk_prot);
665 return INDIRECT_CALL_2(prot->sendmsg, tcp_sendmsg, udpv6_sendmsg,
666 sk, msg, size);
667 }
668
669 INDIRECT_CALLABLE_DECLARE(int udpv6_recvmsg(struct sock *, struct msghdr *,
670 size_t, int, int *));
inet6_recvmsg(struct socket * sock,struct msghdr * msg,size_t size,int flags)671 int inet6_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
672 int flags)
673 {
674 struct sock *sk = sock->sk;
675 const struct proto *prot;
676 int addr_len = 0;
677 int err;
678
679 if (likely(!(flags & MSG_ERRQUEUE)))
680 sock_rps_record_flow(sk);
681
682 /* IPV6_ADDRFORM can change sk->sk_prot under us. */
683 prot = READ_ONCE(sk->sk_prot);
684 err = INDIRECT_CALL_2(prot->recvmsg, tcp_recvmsg, udpv6_recvmsg,
685 sk, msg, size, flags, &addr_len);
686 if (err >= 0)
687 msg->msg_namelen = addr_len;
688 return err;
689 }
690
691 const struct proto_ops inet6_stream_ops = {
692 .family = PF_INET6,
693 .owner = THIS_MODULE,
694 .release = inet6_release,
695 .bind = inet6_bind,
696 .connect = inet_stream_connect, /* ok */
697 .socketpair = sock_no_socketpair, /* a do nothing */
698 .accept = inet_accept, /* ok */
699 .getname = inet6_getname,
700 .poll = tcp_poll, /* ok */
701 .ioctl = inet6_ioctl, /* must change */
702 .gettstamp = sock_gettstamp,
703 .listen = inet_listen, /* ok */
704 .shutdown = inet_shutdown, /* ok */
705 .setsockopt = sock_common_setsockopt, /* ok */
706 .getsockopt = sock_common_getsockopt, /* ok */
707 .sendmsg = inet6_sendmsg, /* retpoline's sake */
708 .recvmsg = inet6_recvmsg, /* retpoline's sake */
709 #ifdef CONFIG_MMU
710 .mmap = tcp_mmap,
711 #endif
712 .sendpage = inet_sendpage,
713 .sendmsg_locked = tcp_sendmsg_locked,
714 .sendpage_locked = tcp_sendpage_locked,
715 .splice_read = tcp_splice_read,
716 .read_sock = tcp_read_sock,
717 .read_skb = tcp_read_skb,
718 .peek_len = tcp_peek_len,
719 #ifdef CONFIG_COMPAT
720 .compat_ioctl = inet6_compat_ioctl,
721 #endif
722 .set_rcvlowat = tcp_set_rcvlowat,
723 };
724
725 const struct proto_ops inet6_dgram_ops = {
726 .family = PF_INET6,
727 .owner = THIS_MODULE,
728 .release = inet6_release,
729 .bind = inet6_bind,
730 .connect = inet_dgram_connect, /* ok */
731 .socketpair = sock_no_socketpair, /* a do nothing */
732 .accept = sock_no_accept, /* a do nothing */
733 .getname = inet6_getname,
734 .poll = udp_poll, /* ok */
735 .ioctl = inet6_ioctl, /* must change */
736 .gettstamp = sock_gettstamp,
737 .listen = sock_no_listen, /* ok */
738 .shutdown = inet_shutdown, /* ok */
739 .setsockopt = sock_common_setsockopt, /* ok */
740 .getsockopt = sock_common_getsockopt, /* ok */
741 .sendmsg = inet6_sendmsg, /* retpoline's sake */
742 .recvmsg = inet6_recvmsg, /* retpoline's sake */
743 .read_skb = udp_read_skb,
744 .mmap = sock_no_mmap,
745 .sendpage = sock_no_sendpage,
746 .set_peek_off = sk_set_peek_off,
747 #ifdef CONFIG_COMPAT
748 .compat_ioctl = inet6_compat_ioctl,
749 #endif
750 };
751
752 static const struct net_proto_family inet6_family_ops = {
753 .family = PF_INET6,
754 .create = inet6_create,
755 .owner = THIS_MODULE,
756 };
757
inet6_register_protosw(struct inet_protosw * p)758 int inet6_register_protosw(struct inet_protosw *p)
759 {
760 struct list_head *lh;
761 struct inet_protosw *answer;
762 struct list_head *last_perm;
763 int protocol = p->protocol;
764 int ret;
765
766 spin_lock_bh(&inetsw6_lock);
767
768 ret = -EINVAL;
769 if (p->type >= SOCK_MAX)
770 goto out_illegal;
771
772 /* If we are trying to override a permanent protocol, bail. */
773 answer = NULL;
774 ret = -EPERM;
775 last_perm = &inetsw6[p->type];
776 list_for_each(lh, &inetsw6[p->type]) {
777 answer = list_entry(lh, struct inet_protosw, list);
778
779 /* Check only the non-wild match. */
780 if (INET_PROTOSW_PERMANENT & answer->flags) {
781 if (protocol == answer->protocol)
782 break;
783 last_perm = lh;
784 }
785
786 answer = NULL;
787 }
788 if (answer)
789 goto out_permanent;
790
791 /* Add the new entry after the last permanent entry if any, so that
792 * the new entry does not override a permanent entry when matched with
793 * a wild-card protocol. But it is allowed to override any existing
794 * non-permanent entry. This means that when we remove this entry, the
795 * system automatically returns to the old behavior.
796 */
797 list_add_rcu(&p->list, last_perm);
798 ret = 0;
799 out:
800 spin_unlock_bh(&inetsw6_lock);
801 return ret;
802
803 out_permanent:
804 pr_err("Attempt to override permanent protocol %d\n", protocol);
805 goto out;
806
807 out_illegal:
808 pr_err("Ignoring attempt to register invalid socket type %d\n",
809 p->type);
810 goto out;
811 }
812 EXPORT_SYMBOL(inet6_register_protosw);
813
814 void
inet6_unregister_protosw(struct inet_protosw * p)815 inet6_unregister_protosw(struct inet_protosw *p)
816 {
817 if (INET_PROTOSW_PERMANENT & p->flags) {
818 pr_err("Attempt to unregister permanent protocol %d\n",
819 p->protocol);
820 } else {
821 spin_lock_bh(&inetsw6_lock);
822 list_del_rcu(&p->list);
823 spin_unlock_bh(&inetsw6_lock);
824
825 synchronize_net();
826 }
827 }
828 EXPORT_SYMBOL(inet6_unregister_protosw);
829
inet6_sk_rebuild_header(struct sock * sk)830 int inet6_sk_rebuild_header(struct sock *sk)
831 {
832 struct ipv6_pinfo *np = inet6_sk(sk);
833 struct dst_entry *dst;
834
835 dst = __sk_dst_check(sk, np->dst_cookie);
836
837 if (!dst) {
838 struct inet_sock *inet = inet_sk(sk);
839 struct in6_addr *final_p, final;
840 struct flowi6 fl6;
841
842 memset(&fl6, 0, sizeof(fl6));
843 fl6.flowi6_proto = sk->sk_protocol;
844 fl6.daddr = sk->sk_v6_daddr;
845 fl6.saddr = np->saddr;
846 fl6.flowlabel = np->flow_label;
847 fl6.flowi6_oif = sk->sk_bound_dev_if;
848 fl6.flowi6_mark = sk->sk_mark;
849 fl6.fl6_dport = inet->inet_dport;
850 fl6.fl6_sport = inet->inet_sport;
851 fl6.flowi6_uid = sk->sk_uid;
852 security_sk_classify_flow(sk, flowi6_to_flowi_common(&fl6));
853
854 rcu_read_lock();
855 final_p = fl6_update_dst(&fl6, rcu_dereference(np->opt),
856 &final);
857 rcu_read_unlock();
858
859 dst = ip6_dst_lookup_flow(sock_net(sk), sk, &fl6, final_p);
860 if (IS_ERR(dst)) {
861 sk->sk_route_caps = 0;
862 sk->sk_err_soft = -PTR_ERR(dst);
863 return PTR_ERR(dst);
864 }
865
866 ip6_dst_store(sk, dst, NULL, NULL);
867 }
868
869 return 0;
870 }
871 EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header);
872
ipv6_opt_accepted(const struct sock * sk,const struct sk_buff * skb,const struct inet6_skb_parm * opt)873 bool ipv6_opt_accepted(const struct sock *sk, const struct sk_buff *skb,
874 const struct inet6_skb_parm *opt)
875 {
876 const struct ipv6_pinfo *np = inet6_sk(sk);
877
878 if (np->rxopt.all) {
879 if (((opt->flags & IP6SKB_HOPBYHOP) &&
880 (np->rxopt.bits.hopopts || np->rxopt.bits.ohopopts)) ||
881 (ip6_flowinfo((struct ipv6hdr *) skb_network_header(skb)) &&
882 np->rxopt.bits.rxflow) ||
883 (opt->srcrt && (np->rxopt.bits.srcrt ||
884 np->rxopt.bits.osrcrt)) ||
885 ((opt->dst1 || opt->dst0) &&
886 (np->rxopt.bits.dstopts || np->rxopt.bits.odstopts)))
887 return true;
888 }
889 return false;
890 }
891 EXPORT_SYMBOL_GPL(ipv6_opt_accepted);
892
893 static struct packet_type ipv6_packet_type __read_mostly = {
894 .type = cpu_to_be16(ETH_P_IPV6),
895 .func = ipv6_rcv,
896 .list_func = ipv6_list_rcv,
897 };
898
ipv6_packet_init(void)899 static int __init ipv6_packet_init(void)
900 {
901 dev_add_pack(&ipv6_packet_type);
902 return 0;
903 }
904
ipv6_packet_cleanup(void)905 static void ipv6_packet_cleanup(void)
906 {
907 dev_remove_pack(&ipv6_packet_type);
908 }
909
ipv6_init_mibs(struct net * net)910 static int __net_init ipv6_init_mibs(struct net *net)
911 {
912 int i;
913
914 net->mib.udp_stats_in6 = alloc_percpu(struct udp_mib);
915 if (!net->mib.udp_stats_in6)
916 return -ENOMEM;
917 net->mib.udplite_stats_in6 = alloc_percpu(struct udp_mib);
918 if (!net->mib.udplite_stats_in6)
919 goto err_udplite_mib;
920 net->mib.ipv6_statistics = alloc_percpu(struct ipstats_mib);
921 if (!net->mib.ipv6_statistics)
922 goto err_ip_mib;
923
924 for_each_possible_cpu(i) {
925 struct ipstats_mib *af_inet6_stats;
926 af_inet6_stats = per_cpu_ptr(net->mib.ipv6_statistics, i);
927 u64_stats_init(&af_inet6_stats->syncp);
928 }
929
930
931 net->mib.icmpv6_statistics = alloc_percpu(struct icmpv6_mib);
932 if (!net->mib.icmpv6_statistics)
933 goto err_icmp_mib;
934 net->mib.icmpv6msg_statistics = kzalloc(sizeof(struct icmpv6msg_mib),
935 GFP_KERNEL);
936 if (!net->mib.icmpv6msg_statistics)
937 goto err_icmpmsg_mib;
938 return 0;
939
940 err_icmpmsg_mib:
941 free_percpu(net->mib.icmpv6_statistics);
942 err_icmp_mib:
943 free_percpu(net->mib.ipv6_statistics);
944 err_ip_mib:
945 free_percpu(net->mib.udplite_stats_in6);
946 err_udplite_mib:
947 free_percpu(net->mib.udp_stats_in6);
948 return -ENOMEM;
949 }
950
ipv6_cleanup_mibs(struct net * net)951 static void ipv6_cleanup_mibs(struct net *net)
952 {
953 free_percpu(net->mib.udp_stats_in6);
954 free_percpu(net->mib.udplite_stats_in6);
955 free_percpu(net->mib.ipv6_statistics);
956 free_percpu(net->mib.icmpv6_statistics);
957 kfree(net->mib.icmpv6msg_statistics);
958 }
959
inet6_net_init(struct net * net)960 static int __net_init inet6_net_init(struct net *net)
961 {
962 int err = 0;
963
964 net->ipv6.sysctl.bindv6only = 0;
965 net->ipv6.sysctl.icmpv6_time = 1*HZ;
966 net->ipv6.sysctl.icmpv6_echo_ignore_all = 0;
967 net->ipv6.sysctl.icmpv6_echo_ignore_multicast = 0;
968 net->ipv6.sysctl.icmpv6_echo_ignore_anycast = 0;
969
970 /* By default, rate limit error messages.
971 * Except for pmtu discovery, it would break it.
972 * proc_do_large_bitmap needs pointer to the bitmap.
973 */
974 bitmap_set(net->ipv6.sysctl.icmpv6_ratemask, 0, ICMPV6_ERRMSG_MAX + 1);
975 bitmap_clear(net->ipv6.sysctl.icmpv6_ratemask, ICMPV6_PKT_TOOBIG, 1);
976 net->ipv6.sysctl.icmpv6_ratemask_ptr = net->ipv6.sysctl.icmpv6_ratemask;
977
978 net->ipv6.sysctl.flowlabel_consistency = 1;
979 net->ipv6.sysctl.auto_flowlabels = IP6_DEFAULT_AUTO_FLOW_LABELS;
980 net->ipv6.sysctl.idgen_retries = 3;
981 net->ipv6.sysctl.idgen_delay = 1 * HZ;
982 net->ipv6.sysctl.flowlabel_state_ranges = 0;
983 net->ipv6.sysctl.max_dst_opts_cnt = IP6_DEFAULT_MAX_DST_OPTS_CNT;
984 net->ipv6.sysctl.max_hbh_opts_cnt = IP6_DEFAULT_MAX_HBH_OPTS_CNT;
985 net->ipv6.sysctl.max_dst_opts_len = IP6_DEFAULT_MAX_DST_OPTS_LEN;
986 net->ipv6.sysctl.max_hbh_opts_len = IP6_DEFAULT_MAX_HBH_OPTS_LEN;
987 net->ipv6.sysctl.fib_notify_on_flag_change = 0;
988 atomic_set(&net->ipv6.fib6_sernum, 1);
989
990 net->ipv6.sysctl.ioam6_id = IOAM6_DEFAULT_ID;
991 net->ipv6.sysctl.ioam6_id_wide = IOAM6_DEFAULT_ID_WIDE;
992
993 err = ipv6_init_mibs(net);
994 if (err)
995 return err;
996 #ifdef CONFIG_PROC_FS
997 err = udp6_proc_init(net);
998 if (err)
999 goto out;
1000 err = tcp6_proc_init(net);
1001 if (err)
1002 goto proc_tcp6_fail;
1003 err = ac6_proc_init(net);
1004 if (err)
1005 goto proc_ac6_fail;
1006 #endif
1007 return err;
1008
1009 #ifdef CONFIG_PROC_FS
1010 proc_ac6_fail:
1011 tcp6_proc_exit(net);
1012 proc_tcp6_fail:
1013 udp6_proc_exit(net);
1014 out:
1015 ipv6_cleanup_mibs(net);
1016 return err;
1017 #endif
1018 }
1019
inet6_net_exit(struct net * net)1020 static void __net_exit inet6_net_exit(struct net *net)
1021 {
1022 #ifdef CONFIG_PROC_FS
1023 udp6_proc_exit(net);
1024 tcp6_proc_exit(net);
1025 ac6_proc_exit(net);
1026 #endif
1027 ipv6_cleanup_mibs(net);
1028 }
1029
1030 static struct pernet_operations inet6_net_ops = {
1031 .init = inet6_net_init,
1032 .exit = inet6_net_exit,
1033 };
1034
ipv6_route_input(struct sk_buff * skb)1035 static int ipv6_route_input(struct sk_buff *skb)
1036 {
1037 ip6_route_input(skb);
1038 return skb_dst(skb)->error;
1039 }
1040
1041 static const struct ipv6_stub ipv6_stub_impl = {
1042 .ipv6_sock_mc_join = ipv6_sock_mc_join,
1043 .ipv6_sock_mc_drop = ipv6_sock_mc_drop,
1044 .ipv6_dst_lookup_flow = ip6_dst_lookup_flow,
1045 .ipv6_route_input = ipv6_route_input,
1046 .fib6_get_table = fib6_get_table,
1047 .fib6_table_lookup = fib6_table_lookup,
1048 .fib6_lookup = fib6_lookup,
1049 .fib6_select_path = fib6_select_path,
1050 .ip6_mtu_from_fib6 = ip6_mtu_from_fib6,
1051 .fib6_nh_init = fib6_nh_init,
1052 .fib6_nh_release = fib6_nh_release,
1053 .fib6_nh_release_dsts = fib6_nh_release_dsts,
1054 .fib6_update_sernum = fib6_update_sernum_stub,
1055 .fib6_rt_update = fib6_rt_update,
1056 .ip6_del_rt = ip6_del_rt,
1057 .udpv6_encap_enable = udpv6_encap_enable,
1058 .ndisc_send_na = ndisc_send_na,
1059 #if IS_ENABLED(CONFIG_XFRM)
1060 .xfrm6_local_rxpmtu = xfrm6_local_rxpmtu,
1061 .xfrm6_udp_encap_rcv = xfrm6_udp_encap_rcv,
1062 .xfrm6_rcv_encap = xfrm6_rcv_encap,
1063 #endif
1064 .nd_tbl = &nd_tbl,
1065 .ipv6_fragment = ip6_fragment,
1066 .ipv6_dev_find = ipv6_dev_find,
1067 };
1068
1069 static const struct ipv6_bpf_stub ipv6_bpf_stub_impl = {
1070 .inet6_bind = __inet6_bind,
1071 .udp6_lib_lookup = __udp6_lib_lookup,
1072 .ipv6_setsockopt = do_ipv6_setsockopt,
1073 .ipv6_getsockopt = do_ipv6_getsockopt,
1074 };
1075
inet6_init(void)1076 static int __init inet6_init(void)
1077 {
1078 struct list_head *r;
1079 int err = 0;
1080
1081 sock_skb_cb_check_size(sizeof(struct inet6_skb_parm));
1082
1083 /* Register the socket-side information for inet6_create. */
1084 for (r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r)
1085 INIT_LIST_HEAD(r);
1086
1087 raw_hashinfo_init(&raw_v6_hashinfo);
1088
1089 if (disable_ipv6_mod) {
1090 pr_info("Loaded, but administratively disabled, reboot required to enable\n");
1091 goto out;
1092 }
1093
1094 err = proto_register(&tcpv6_prot, 1);
1095 if (err)
1096 goto out;
1097
1098 err = proto_register(&udpv6_prot, 1);
1099 if (err)
1100 goto out_unregister_tcp_proto;
1101
1102 err = proto_register(&udplitev6_prot, 1);
1103 if (err)
1104 goto out_unregister_udp_proto;
1105
1106 err = proto_register(&rawv6_prot, 1);
1107 if (err)
1108 goto out_unregister_udplite_proto;
1109
1110 err = proto_register(&pingv6_prot, 1);
1111 if (err)
1112 goto out_unregister_raw_proto;
1113
1114 /* We MUST register RAW sockets before we create the ICMP6,
1115 * IGMP6, or NDISC control sockets.
1116 */
1117 err = rawv6_init();
1118 if (err)
1119 goto out_unregister_ping_proto;
1120
1121 /* Register the family here so that the init calls below will
1122 * be able to create sockets. (?? is this dangerous ??)
1123 */
1124 err = sock_register(&inet6_family_ops);
1125 if (err)
1126 goto out_sock_register_fail;
1127
1128 /*
1129 * ipngwg API draft makes clear that the correct semantics
1130 * for TCP and UDP is to consider one TCP and UDP instance
1131 * in a host available by both INET and INET6 APIs and
1132 * able to communicate via both network protocols.
1133 */
1134
1135 err = register_pernet_subsys(&inet6_net_ops);
1136 if (err)
1137 goto register_pernet_fail;
1138 err = ip6_mr_init();
1139 if (err)
1140 goto ipmr_fail;
1141 err = icmpv6_init();
1142 if (err)
1143 goto icmp_fail;
1144 err = ndisc_init();
1145 if (err)
1146 goto ndisc_fail;
1147 err = igmp6_init();
1148 if (err)
1149 goto igmp_fail;
1150
1151 err = ipv6_netfilter_init();
1152 if (err)
1153 goto netfilter_fail;
1154 /* Create /proc/foo6 entries. */
1155 #ifdef CONFIG_PROC_FS
1156 err = -ENOMEM;
1157 if (raw6_proc_init())
1158 goto proc_raw6_fail;
1159 if (udplite6_proc_init())
1160 goto proc_udplite6_fail;
1161 if (ipv6_misc_proc_init())
1162 goto proc_misc6_fail;
1163 if (if6_proc_init())
1164 goto proc_if6_fail;
1165 #endif
1166 err = ip6_route_init();
1167 if (err)
1168 goto ip6_route_fail;
1169 err = ndisc_late_init();
1170 if (err)
1171 goto ndisc_late_fail;
1172 err = ip6_flowlabel_init();
1173 if (err)
1174 goto ip6_flowlabel_fail;
1175 err = ipv6_anycast_init();
1176 if (err)
1177 goto ipv6_anycast_fail;
1178 err = addrconf_init();
1179 if (err)
1180 goto addrconf_fail;
1181
1182 /* Init v6 extension headers. */
1183 err = ipv6_exthdrs_init();
1184 if (err)
1185 goto ipv6_exthdrs_fail;
1186
1187 err = ipv6_frag_init();
1188 if (err)
1189 goto ipv6_frag_fail;
1190
1191 /* Init v6 transport protocols. */
1192 err = udpv6_init();
1193 if (err)
1194 goto udpv6_fail;
1195
1196 err = udplitev6_init();
1197 if (err)
1198 goto udplitev6_fail;
1199
1200 err = udpv6_offload_init();
1201 if (err)
1202 goto udpv6_offload_fail;
1203
1204 err = tcpv6_init();
1205 if (err)
1206 goto tcpv6_fail;
1207
1208 err = ipv6_packet_init();
1209 if (err)
1210 goto ipv6_packet_fail;
1211
1212 err = pingv6_init();
1213 if (err)
1214 goto pingv6_fail;
1215
1216 err = calipso_init();
1217 if (err)
1218 goto calipso_fail;
1219
1220 err = seg6_init();
1221 if (err)
1222 goto seg6_fail;
1223
1224 err = rpl_init();
1225 if (err)
1226 goto rpl_fail;
1227
1228 err = ioam6_init();
1229 if (err)
1230 goto ioam6_fail;
1231
1232 err = igmp6_late_init();
1233 if (err)
1234 goto igmp6_late_err;
1235
1236 #ifdef CONFIG_SYSCTL
1237 err = ipv6_sysctl_register();
1238 if (err)
1239 goto sysctl_fail;
1240 #endif
1241
1242 /* ensure that ipv6 stubs are visible only after ipv6 is ready */
1243 wmb();
1244 ipv6_stub = &ipv6_stub_impl;
1245 ipv6_bpf_stub = &ipv6_bpf_stub_impl;
1246 out:
1247 return err;
1248
1249 #ifdef CONFIG_SYSCTL
1250 sysctl_fail:
1251 igmp6_late_cleanup();
1252 #endif
1253 igmp6_late_err:
1254 ioam6_exit();
1255 ioam6_fail:
1256 rpl_exit();
1257 rpl_fail:
1258 seg6_exit();
1259 seg6_fail:
1260 calipso_exit();
1261 calipso_fail:
1262 pingv6_exit();
1263 pingv6_fail:
1264 ipv6_packet_cleanup();
1265 ipv6_packet_fail:
1266 tcpv6_exit();
1267 tcpv6_fail:
1268 udpv6_offload_exit();
1269 udpv6_offload_fail:
1270 udplitev6_exit();
1271 udplitev6_fail:
1272 udpv6_exit();
1273 udpv6_fail:
1274 ipv6_frag_exit();
1275 ipv6_frag_fail:
1276 ipv6_exthdrs_exit();
1277 ipv6_exthdrs_fail:
1278 addrconf_cleanup();
1279 addrconf_fail:
1280 ipv6_anycast_cleanup();
1281 ipv6_anycast_fail:
1282 ip6_flowlabel_cleanup();
1283 ip6_flowlabel_fail:
1284 ndisc_late_cleanup();
1285 ndisc_late_fail:
1286 ip6_route_cleanup();
1287 ip6_route_fail:
1288 #ifdef CONFIG_PROC_FS
1289 if6_proc_exit();
1290 proc_if6_fail:
1291 ipv6_misc_proc_exit();
1292 proc_misc6_fail:
1293 udplite6_proc_exit();
1294 proc_udplite6_fail:
1295 raw6_proc_exit();
1296 proc_raw6_fail:
1297 #endif
1298 ipv6_netfilter_fini();
1299 netfilter_fail:
1300 igmp6_cleanup();
1301 igmp_fail:
1302 ndisc_cleanup();
1303 ndisc_fail:
1304 icmpv6_cleanup();
1305 icmp_fail:
1306 ip6_mr_cleanup();
1307 ipmr_fail:
1308 unregister_pernet_subsys(&inet6_net_ops);
1309 register_pernet_fail:
1310 sock_unregister(PF_INET6);
1311 rtnl_unregister_all(PF_INET6);
1312 out_sock_register_fail:
1313 rawv6_exit();
1314 out_unregister_ping_proto:
1315 proto_unregister(&pingv6_prot);
1316 out_unregister_raw_proto:
1317 proto_unregister(&rawv6_prot);
1318 out_unregister_udplite_proto:
1319 proto_unregister(&udplitev6_prot);
1320 out_unregister_udp_proto:
1321 proto_unregister(&udpv6_prot);
1322 out_unregister_tcp_proto:
1323 proto_unregister(&tcpv6_prot);
1324 goto out;
1325 }
1326 module_init(inet6_init);
1327
1328 MODULE_ALIAS_NETPROTO(PF_INET6);
1329
