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 #include <net/rps.h>
68
69 #include <linux/uaccess.h>
70 #include <linux/mroute6.h>
71 #include <trace/hooks/net.h>
72
73 #include <trace/hooks/net.h>
74
75 #include "ip6_offload.h"
76
77 MODULE_AUTHOR("Cast of dozens");
78 MODULE_DESCRIPTION("IPv6 protocol stack for Linux");
79 MODULE_LICENSE("GPL");
80
81 /* The inetsw6 table contains everything that inet6_create needs to
82 * build a new socket.
83 */
84 static struct list_head inetsw6[SOCK_MAX];
85 static DEFINE_SPINLOCK(inetsw6_lock);
86
87 struct ipv6_params ipv6_defaults = {
88 .disable_ipv6 = 0,
89 .autoconf = 1,
90 };
91
92 static int disable_ipv6_mod;
93
94 module_param_named(disable, disable_ipv6_mod, int, 0444);
95 MODULE_PARM_DESC(disable, "Disable IPv6 module such that it is non-functional");
96
97 module_param_named(disable_ipv6, ipv6_defaults.disable_ipv6, int, 0444);
98 MODULE_PARM_DESC(disable_ipv6, "Disable IPv6 on all interfaces");
99
100 module_param_named(autoconf, ipv6_defaults.autoconf, int, 0444);
101 MODULE_PARM_DESC(autoconf, "Enable IPv6 address autoconfiguration on all interfaces");
102
ipv6_mod_enabled(void)103 bool ipv6_mod_enabled(void)
104 {
105 return disable_ipv6_mod == 0;
106 }
107 EXPORT_SYMBOL_GPL(ipv6_mod_enabled);
108
inet6_sk_generic(struct sock * sk)109 static struct ipv6_pinfo *inet6_sk_generic(struct sock *sk)
110 {
111 const int offset = sk->sk_prot->ipv6_pinfo_offset;
112
113 return (struct ipv6_pinfo *)(((u8 *)sk) + offset);
114 }
115
inet6_sock_destruct(struct sock * sk)116 void inet6_sock_destruct(struct sock *sk)
117 {
118 inet6_cleanup_sock(sk);
119 inet_sock_destruct(sk);
120 }
121 EXPORT_SYMBOL_GPL(inet6_sock_destruct);
122
inet6_create(struct net * net,struct socket * sock,int protocol,int kern)123 static int inet6_create(struct net *net, struct socket *sock, int protocol,
124 int kern)
125 {
126 struct inet_sock *inet;
127 struct ipv6_pinfo *np;
128 struct sock *sk = NULL;
129 struct inet_protosw *answer;
130 struct proto *answer_prot;
131 unsigned char answer_flags;
132 int try_loading_module = 0;
133 int err;
134
135 if (protocol < 0 || protocol >= IPPROTO_MAX)
136 return -EINVAL;
137
138 /* Look for the requested type/protocol pair. */
139 lookup_protocol:
140 err = -ESOCKTNOSUPPORT;
141 rcu_read_lock();
142 list_for_each_entry_rcu(answer, &inetsw6[sock->type], list) {
143
144 err = 0;
145 /* Check the non-wild match. */
146 if (protocol == answer->protocol) {
147 if (protocol != IPPROTO_IP)
148 break;
149 } else {
150 /* Check for the two wild cases. */
151 if (IPPROTO_IP == protocol) {
152 protocol = answer->protocol;
153 break;
154 }
155 if (IPPROTO_IP == answer->protocol)
156 break;
157 }
158 err = -EPROTONOSUPPORT;
159 }
160
161 if (err) {
162 if (try_loading_module < 2) {
163 rcu_read_unlock();
164 /*
165 * Be more specific, e.g. net-pf-10-proto-132-type-1
166 * (net-pf-PF_INET6-proto-IPPROTO_SCTP-type-SOCK_STREAM)
167 */
168 if (++try_loading_module == 1)
169 request_module("net-pf-%d-proto-%d-type-%d",
170 PF_INET6, protocol, sock->type);
171 /*
172 * Fall back to generic, e.g. net-pf-10-proto-132
173 * (net-pf-PF_INET6-proto-IPPROTO_SCTP)
174 */
175 else
176 request_module("net-pf-%d-proto-%d",
177 PF_INET6, protocol);
178 goto lookup_protocol;
179 } else
180 goto out_rcu_unlock;
181 }
182
183 err = -EPERM;
184 if (sock->type == SOCK_RAW && !kern &&
185 !ns_capable(net->user_ns, CAP_NET_RAW))
186 goto out_rcu_unlock;
187
188 sock->ops = answer->ops;
189 answer_prot = answer->prot;
190 answer_flags = answer->flags;
191 rcu_read_unlock();
192
193 WARN_ON(!answer_prot->slab);
194
195 err = -ENOBUFS;
196 sk = sk_alloc(net, PF_INET6, GFP_KERNEL, answer_prot, kern);
197 if (!sk)
198 goto out;
199
200 sock_init_data(sock, sk);
201
202 err = 0;
203 if (INET_PROTOSW_REUSE & answer_flags)
204 sk->sk_reuse = SK_CAN_REUSE;
205
206 if (INET_PROTOSW_ICSK & answer_flags)
207 inet_init_csk_locks(sk);
208
209 inet = inet_sk(sk);
210 inet_assign_bit(IS_ICSK, sk, INET_PROTOSW_ICSK & answer_flags);
211
212 if (SOCK_RAW == sock->type) {
213 inet->inet_num = protocol;
214 if (IPPROTO_RAW == protocol)
215 inet_set_bit(HDRINCL, sk);
216 }
217
218 sk->sk_destruct = inet6_sock_destruct;
219 sk->sk_family = PF_INET6;
220 sk->sk_protocol = protocol;
221
222 sk->sk_backlog_rcv = answer->prot->backlog_rcv;
223
224 inet_sk(sk)->pinet6 = np = inet6_sk_generic(sk);
225 np->hop_limit = -1;
226 np->mcast_hops = IPV6_DEFAULT_MCASTHOPS;
227 inet6_set_bit(MC6_LOOP, sk);
228 inet6_set_bit(MC6_ALL, sk);
229 np->pmtudisc = IPV6_PMTUDISC_WANT;
230 inet6_assign_bit(REPFLOW, sk, net->ipv6.sysctl.flowlabel_reflect &
231 FLOWLABEL_REFLECT_ESTABLISHED);
232 sk->sk_ipv6only = net->ipv6.sysctl.bindv6only;
233 sk->sk_txrehash = READ_ONCE(net->core.sysctl_txrehash);
234
235 /* Init the ipv4 part of the socket since we can have sockets
236 * using v6 API for ipv4.
237 */
238 inet->uc_ttl = -1;
239
240 inet_set_bit(MC_LOOP, sk);
241 inet->mc_ttl = 1;
242 inet->mc_index = 0;
243 RCU_INIT_POINTER(inet->mc_list, NULL);
244 inet->rcv_tos = 0;
245
246 if (READ_ONCE(net->ipv4.sysctl_ip_no_pmtu_disc))
247 inet->pmtudisc = IP_PMTUDISC_DONT;
248 else
249 inet->pmtudisc = IP_PMTUDISC_WANT;
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 goto out_sk_release;
260 }
261 if (sk->sk_prot->init) {
262 err = sk->sk_prot->init(sk);
263 if (err)
264 goto out_sk_release;
265 }
266
267 if (!kern) {
268 err = BPF_CGROUP_RUN_PROG_INET_SOCK(sk);
269 if (err)
270 goto out_sk_release;
271 }
272
273 trace_android_rvh_inet_sock_create(sk);
274
275 out:
276 trace_android_vh_inet_create(sk, err);
277 return err;
278 out_rcu_unlock:
279 rcu_read_unlock();
280 goto out;
281 out_sk_release:
282 sk_common_release(sk);
283 sock->sk = NULL;
284 goto out;
285 }
286
__inet6_bind(struct sock * sk,struct sockaddr * uaddr,int addr_len,u32 flags)287 static int __inet6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len,
288 u32 flags)
289 {
290 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)uaddr;
291 struct inet_sock *inet = inet_sk(sk);
292 struct ipv6_pinfo *np = inet6_sk(sk);
293 struct net *net = sock_net(sk);
294 __be32 v4addr = 0;
295 unsigned short snum;
296 bool saved_ipv6only;
297 int addr_type = 0;
298 int err = 0;
299
300 if (addr->sin6_family != AF_INET6)
301 return -EAFNOSUPPORT;
302
303 addr_type = ipv6_addr_type(&addr->sin6_addr);
304 if ((addr_type & IPV6_ADDR_MULTICAST) && sk->sk_type == SOCK_STREAM)
305 return -EINVAL;
306
307 snum = ntohs(addr->sin6_port);
308 if (!(flags & BIND_NO_CAP_NET_BIND_SERVICE) &&
309 snum && inet_port_requires_bind_service(net, snum) &&
310 !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE))
311 return -EACCES;
312
313 if (flags & BIND_WITH_LOCK)
314 lock_sock(sk);
315
316 /* Check these errors (active socket, double bind). */
317 if (sk->sk_state != TCP_CLOSE || inet->inet_num) {
318 err = -EINVAL;
319 goto out;
320 }
321
322 /* Check if the address belongs to the host. */
323 if (addr_type == IPV6_ADDR_MAPPED) {
324 struct net_device *dev = NULL;
325 int chk_addr_ret;
326
327 /* Binding to v4-mapped address on a v6-only socket
328 * makes no sense
329 */
330 if (ipv6_only_sock(sk)) {
331 err = -EINVAL;
332 goto out;
333 }
334
335 rcu_read_lock();
336 if (sk->sk_bound_dev_if) {
337 dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if);
338 if (!dev) {
339 err = -ENODEV;
340 goto out_unlock;
341 }
342 }
343
344 /* Reproduce AF_INET checks to make the bindings consistent */
345 v4addr = addr->sin6_addr.s6_addr32[3];
346 chk_addr_ret = inet_addr_type_dev_table(net, dev, v4addr);
347 rcu_read_unlock();
348
349 if (!inet_addr_valid_or_nonlocal(net, inet, v4addr,
350 chk_addr_ret)) {
351 err = -EADDRNOTAVAIL;
352 goto out;
353 }
354 } else {
355 if (addr_type != IPV6_ADDR_ANY) {
356 struct net_device *dev = NULL;
357
358 rcu_read_lock();
359 if (__ipv6_addr_needs_scope_id(addr_type)) {
360 if (addr_len >= sizeof(struct sockaddr_in6) &&
361 addr->sin6_scope_id) {
362 /* Override any existing binding, if another one
363 * is supplied by user.
364 */
365 sk->sk_bound_dev_if = addr->sin6_scope_id;
366 }
367
368 /* Binding to link-local address requires an interface */
369 if (!sk->sk_bound_dev_if) {
370 err = -EINVAL;
371 goto out_unlock;
372 }
373 }
374
375 if (sk->sk_bound_dev_if) {
376 dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if);
377 if (!dev) {
378 err = -ENODEV;
379 goto out_unlock;
380 }
381 }
382
383 /* ipv4 addr of the socket is invalid. Only the
384 * unspecified and mapped address have a v4 equivalent.
385 */
386 v4addr = LOOPBACK4_IPV6;
387 if (!(addr_type & IPV6_ADDR_MULTICAST)) {
388 if (!ipv6_can_nonlocal_bind(net, inet) &&
389 !ipv6_chk_addr(net, &addr->sin6_addr,
390 dev, 0)) {
391 err = -EADDRNOTAVAIL;
392 goto out_unlock;
393 }
394 }
395 rcu_read_unlock();
396 }
397 }
398
399 inet->inet_rcv_saddr = v4addr;
400 inet->inet_saddr = v4addr;
401
402 sk->sk_v6_rcv_saddr = addr->sin6_addr;
403
404 if (!(addr_type & IPV6_ADDR_MULTICAST))
405 np->saddr = addr->sin6_addr;
406
407 saved_ipv6only = sk->sk_ipv6only;
408 if (addr_type != IPV6_ADDR_ANY && addr_type != IPV6_ADDR_MAPPED)
409 sk->sk_ipv6only = 1;
410
411 /* Make sure we are allowed to bind here. */
412 if (snum || !(inet_test_bit(BIND_ADDRESS_NO_PORT, sk) ||
413 (flags & BIND_FORCE_ADDRESS_NO_PORT))) {
414 err = sk->sk_prot->get_port(sk, snum);
415 if (err) {
416 sk->sk_ipv6only = saved_ipv6only;
417 inet_reset_saddr(sk);
418 goto out;
419 }
420 if (!(flags & BIND_FROM_BPF)) {
421 err = BPF_CGROUP_RUN_PROG_INET6_POST_BIND(sk);
422 if (err) {
423 sk->sk_ipv6only = saved_ipv6only;
424 inet_reset_saddr(sk);
425 if (sk->sk_prot->put_port)
426 sk->sk_prot->put_port(sk);
427 goto out;
428 }
429 }
430 }
431
432 if (addr_type != IPV6_ADDR_ANY)
433 sk->sk_userlocks |= SOCK_BINDADDR_LOCK;
434 if (snum)
435 sk->sk_userlocks |= SOCK_BINDPORT_LOCK;
436 inet->inet_sport = htons(inet->inet_num);
437 inet->inet_dport = 0;
438 inet->inet_daddr = 0;
439 out:
440 if (flags & BIND_WITH_LOCK)
441 release_sock(sk);
442 return err;
443 out_unlock:
444 rcu_read_unlock();
445 goto out;
446 }
447
inet6_bind_sk(struct sock * sk,struct sockaddr * uaddr,int addr_len)448 int inet6_bind_sk(struct sock *sk, struct sockaddr *uaddr, int addr_len)
449 {
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, &addr_len,
467 CGROUP_INET6_BIND, &flags);
468 if (err)
469 return err;
470
471 return __inet6_bind(sk, uaddr, addr_len, flags);
472 }
473
474 /* bind for INET6 API */
inet6_bind(struct socket * sock,struct sockaddr * uaddr,int addr_len)475 int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
476 {
477 return inet6_bind_sk(sock->sk, uaddr, addr_len);
478 }
479 EXPORT_SYMBOL(inet6_bind);
480
inet6_release(struct socket * sock)481 int inet6_release(struct socket *sock)
482 {
483 struct sock *sk = sock->sk;
484
485 if (!sk)
486 return -EINVAL;
487
488 /* Free mc lists */
489 ipv6_sock_mc_close(sk);
490
491 /* Free ac lists */
492 ipv6_sock_ac_close(sk);
493
494 return inet_release(sock);
495 }
496 EXPORT_SYMBOL(inet6_release);
497
inet6_cleanup_sock(struct sock * sk)498 void inet6_cleanup_sock(struct sock *sk)
499 {
500 struct ipv6_pinfo *np = inet6_sk(sk);
501 struct sk_buff *skb;
502 struct ipv6_txoptions *opt;
503
504 /* Release rx options */
505
506 skb = xchg(&np->pktoptions, NULL);
507 kfree_skb(skb);
508
509 skb = xchg(&np->rxpmtu, NULL);
510 kfree_skb(skb);
511
512 /* Free flowlabels */
513 fl6_free_socklist(sk);
514
515 /* Free tx options */
516
517 opt = unrcu_pointer(xchg(&np->opt, NULL));
518 if (opt) {
519 atomic_sub(opt->tot_len, &sk->sk_omem_alloc);
520 txopt_put(opt);
521 }
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 int sin_addr_len = sizeof(*sin);
533 struct sock *sk = sock->sk;
534 struct inet_sock *inet = inet_sk(sk);
535 struct ipv6_pinfo *np = inet6_sk(sk);
536
537 sin->sin6_family = AF_INET6;
538 sin->sin6_flowinfo = 0;
539 sin->sin6_scope_id = 0;
540 lock_sock(sk);
541 if (peer) {
542 if (!inet->inet_dport ||
543 (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) &&
544 peer == 1)) {
545 release_sock(sk);
546 return -ENOTCONN;
547 }
548 sin->sin6_port = inet->inet_dport;
549 sin->sin6_addr = sk->sk_v6_daddr;
550 if (inet6_test_bit(SNDFLOW, sk))
551 sin->sin6_flowinfo = np->flow_label;
552 BPF_CGROUP_RUN_SA_PROG(sk, (struct sockaddr *)sin, &sin_addr_len,
553 CGROUP_INET6_GETPEERNAME);
554 } else {
555 if (ipv6_addr_any(&sk->sk_v6_rcv_saddr))
556 sin->sin6_addr = np->saddr;
557 else
558 sin->sin6_addr = sk->sk_v6_rcv_saddr;
559 sin->sin6_port = inet->inet_sport;
560 BPF_CGROUP_RUN_SA_PROG(sk, (struct sockaddr *)sin, &sin_addr_len,
561 CGROUP_INET6_GETSOCKNAME);
562 }
563 sin->sin6_scope_id = ipv6_iface_scope_id(&sin->sin6_addr,
564 sk->sk_bound_dev_if);
565 release_sock(sk);
566 return sin_addr_len;
567 }
568 EXPORT_SYMBOL(inet6_getname);
569
inet6_ioctl(struct socket * sock,unsigned int cmd,unsigned long arg)570 int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
571 {
572 void __user *argp = (void __user *)arg;
573 struct sock *sk = sock->sk;
574 struct net *net = sock_net(sk);
575 const struct proto *prot;
576
577 switch (cmd) {
578 case SIOCADDRT:
579 case SIOCDELRT: {
580 struct in6_rtmsg rtmsg;
581
582 if (copy_from_user(&rtmsg, argp, sizeof(rtmsg)))
583 return -EFAULT;
584 return ipv6_route_ioctl(net, cmd, &rtmsg);
585 }
586 case SIOCSIFADDR:
587 return addrconf_add_ifaddr(net, argp);
588 case SIOCDIFADDR:
589 return addrconf_del_ifaddr(net, argp);
590 case SIOCSIFDSTADDR:
591 return addrconf_set_dstaddr(net, argp);
592 default:
593 /* IPV6_ADDRFORM can change sk->sk_prot under us. */
594 prot = READ_ONCE(sk->sk_prot);
595 if (!prot->ioctl)
596 return -ENOIOCTLCMD;
597 return sk_ioctl(sk, cmd, (void __user *)arg);
598 }
599 /*NOTREACHED*/
600 return 0;
601 }
602 EXPORT_SYMBOL(inet6_ioctl);
603
604 #ifdef CONFIG_COMPAT
605 struct compat_in6_rtmsg {
606 struct in6_addr rtmsg_dst;
607 struct in6_addr rtmsg_src;
608 struct in6_addr rtmsg_gateway;
609 u32 rtmsg_type;
610 u16 rtmsg_dst_len;
611 u16 rtmsg_src_len;
612 u32 rtmsg_metric;
613 u32 rtmsg_info;
614 u32 rtmsg_flags;
615 s32 rtmsg_ifindex;
616 };
617
inet6_compat_routing_ioctl(struct sock * sk,unsigned int cmd,struct compat_in6_rtmsg __user * ur)618 static int inet6_compat_routing_ioctl(struct sock *sk, unsigned int cmd,
619 struct compat_in6_rtmsg __user *ur)
620 {
621 struct in6_rtmsg rt;
622
623 if (copy_from_user(&rt.rtmsg_dst, &ur->rtmsg_dst,
624 3 * sizeof(struct in6_addr)) ||
625 get_user(rt.rtmsg_type, &ur->rtmsg_type) ||
626 get_user(rt.rtmsg_dst_len, &ur->rtmsg_dst_len) ||
627 get_user(rt.rtmsg_src_len, &ur->rtmsg_src_len) ||
628 get_user(rt.rtmsg_metric, &ur->rtmsg_metric) ||
629 get_user(rt.rtmsg_info, &ur->rtmsg_info) ||
630 get_user(rt.rtmsg_flags, &ur->rtmsg_flags) ||
631 get_user(rt.rtmsg_ifindex, &ur->rtmsg_ifindex))
632 return -EFAULT;
633
634
635 return ipv6_route_ioctl(sock_net(sk), cmd, &rt);
636 }
637
inet6_compat_ioctl(struct socket * sock,unsigned int cmd,unsigned long arg)638 int inet6_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
639 {
640 void __user *argp = compat_ptr(arg);
641 struct sock *sk = sock->sk;
642
643 switch (cmd) {
644 case SIOCADDRT:
645 case SIOCDELRT:
646 return inet6_compat_routing_ioctl(sk, cmd, argp);
647 default:
648 return -ENOIOCTLCMD;
649 }
650 }
651 EXPORT_SYMBOL_GPL(inet6_compat_ioctl);
652 #endif /* CONFIG_COMPAT */
653
654 INDIRECT_CALLABLE_DECLARE(int udpv6_sendmsg(struct sock *, struct msghdr *,
655 size_t));
inet6_sendmsg(struct socket * sock,struct msghdr * msg,size_t size)656 int inet6_sendmsg(struct socket *sock, struct msghdr *msg, size_t size)
657 {
658 struct sock *sk = sock->sk;
659 const struct proto *prot;
660
661 if (unlikely(inet_send_prepare(sk)))
662 return -EAGAIN;
663
664 /* IPV6_ADDRFORM can change sk->sk_prot under us. */
665 prot = READ_ONCE(sk->sk_prot);
666 return INDIRECT_CALL_2(prot->sendmsg, tcp_sendmsg, udpv6_sendmsg,
667 sk, msg, size);
668 }
669
670 INDIRECT_CALLABLE_DECLARE(int udpv6_recvmsg(struct sock *, struct msghdr *,
671 size_t, int, int *));
inet6_recvmsg(struct socket * sock,struct msghdr * msg,size_t size,int flags)672 int inet6_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
673 int flags)
674 {
675 struct sock *sk = sock->sk;
676 const struct proto *prot;
677 int addr_len = 0;
678 int err;
679
680 if (likely(!(flags & MSG_ERRQUEUE)))
681 sock_rps_record_flow(sk);
682
683 /* IPV6_ADDRFORM can change sk->sk_prot under us. */
684 prot = READ_ONCE(sk->sk_prot);
685 err = INDIRECT_CALL_2(prot->recvmsg, tcp_recvmsg, udpv6_recvmsg,
686 sk, msg, size, flags, &addr_len);
687 if (err >= 0)
688 msg->msg_namelen = addr_len;
689 return err;
690 }
691
692 const struct proto_ops inet6_stream_ops = {
693 .family = PF_INET6,
694 .owner = THIS_MODULE,
695 .release = inet6_release,
696 .bind = inet6_bind,
697 .connect = inet_stream_connect, /* ok */
698 .socketpair = sock_no_socketpair, /* a do nothing */
699 .accept = inet_accept, /* ok */
700 .getname = inet6_getname,
701 .poll = tcp_poll, /* ok */
702 .ioctl = inet6_ioctl, /* must change */
703 .gettstamp = sock_gettstamp,
704 .listen = inet_listen, /* ok */
705 .shutdown = inet_shutdown, /* ok */
706 .setsockopt = sock_common_setsockopt, /* ok */
707 .getsockopt = sock_common_getsockopt, /* ok */
708 .sendmsg = inet6_sendmsg, /* retpoline's sake */
709 .recvmsg = inet6_recvmsg, /* retpoline's sake */
710 #ifdef CONFIG_MMU
711 .mmap = tcp_mmap,
712 #endif
713 .splice_eof = inet_splice_eof,
714 .sendmsg_locked = tcp_sendmsg_locked,
715 .splice_read = tcp_splice_read,
716 .set_peek_off = sk_set_peek_off,
717 .read_sock = tcp_read_sock,
718 .read_skb = tcp_read_skb,
719 .peek_len = tcp_peek_len,
720 #ifdef CONFIG_COMPAT
721 .compat_ioctl = inet6_compat_ioctl,
722 #endif
723 .set_rcvlowat = tcp_set_rcvlowat,
724 };
725
726 const struct proto_ops inet6_dgram_ops = {
727 .family = PF_INET6,
728 .owner = THIS_MODULE,
729 .release = inet6_release,
730 .bind = inet6_bind,
731 .connect = inet_dgram_connect, /* ok */
732 .socketpair = sock_no_socketpair, /* a do nothing */
733 .accept = sock_no_accept, /* a do nothing */
734 .getname = inet6_getname,
735 .poll = udp_poll, /* ok */
736 .ioctl = inet6_ioctl, /* must change */
737 .gettstamp = sock_gettstamp,
738 .listen = sock_no_listen, /* ok */
739 .shutdown = inet_shutdown, /* ok */
740 .setsockopt = sock_common_setsockopt, /* ok */
741 .getsockopt = sock_common_getsockopt, /* ok */
742 .sendmsg = inet6_sendmsg, /* retpoline's sake */
743 .recvmsg = inet6_recvmsg, /* retpoline's sake */
744 .read_skb = udp_read_skb,
745 .mmap = sock_no_mmap,
746 .set_peek_off = udp_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 WRITE_ONCE(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 net->ipv6.sysctl.icmpv6_error_anycast_as_unicast = 0;
970
971 /* By default, rate limit error messages.
972 * Except for pmtu discovery, it would break it.
973 * proc_do_large_bitmap needs pointer to the bitmap.
974 */
975 bitmap_set(net->ipv6.sysctl.icmpv6_ratemask, 0, ICMPV6_ERRMSG_MAX + 1);
976 bitmap_clear(net->ipv6.sysctl.icmpv6_ratemask, ICMPV6_PKT_TOOBIG, 1);
977 net->ipv6.sysctl.icmpv6_ratemask_ptr = net->ipv6.sysctl.icmpv6_ratemask;
978
979 net->ipv6.sysctl.flowlabel_consistency = 1;
980 net->ipv6.sysctl.auto_flowlabels = IP6_DEFAULT_AUTO_FLOW_LABELS;
981 net->ipv6.sysctl.idgen_retries = 3;
982 net->ipv6.sysctl.idgen_delay = 1 * HZ;
983 net->ipv6.sysctl.flowlabel_state_ranges = 0;
984 net->ipv6.sysctl.max_dst_opts_cnt = IP6_DEFAULT_MAX_DST_OPTS_CNT;
985 net->ipv6.sysctl.max_hbh_opts_cnt = IP6_DEFAULT_MAX_HBH_OPTS_CNT;
986 net->ipv6.sysctl.max_dst_opts_len = IP6_DEFAULT_MAX_DST_OPTS_LEN;
987 net->ipv6.sysctl.max_hbh_opts_len = IP6_DEFAULT_MAX_HBH_OPTS_LEN;
988 net->ipv6.sysctl.fib_notify_on_flag_change = 0;
989 atomic_set(&net->ipv6.fib6_sernum, 1);
990
991 net->ipv6.sysctl.ioam6_id = IOAM6_DEFAULT_ID;
992 net->ipv6.sysctl.ioam6_id_wide = IOAM6_DEFAULT_ID_WIDE;
993
994 err = ipv6_init_mibs(net);
995 if (err)
996 return err;
997 #ifdef CONFIG_PROC_FS
998 err = udp6_proc_init(net);
999 if (err)
1000 goto out;
1001 err = tcp6_proc_init(net);
1002 if (err)
1003 goto proc_tcp6_fail;
1004 err = ac6_proc_init(net);
1005 if (err)
1006 goto proc_ac6_fail;
1007 #endif
1008 return err;
1009
1010 #ifdef CONFIG_PROC_FS
1011 proc_ac6_fail:
1012 tcp6_proc_exit(net);
1013 proc_tcp6_fail:
1014 udp6_proc_exit(net);
1015 out:
1016 ipv6_cleanup_mibs(net);
1017 return err;
1018 #endif
1019 }
1020
inet6_net_exit(struct net * net)1021 static void __net_exit inet6_net_exit(struct net *net)
1022 {
1023 #ifdef CONFIG_PROC_FS
1024 udp6_proc_exit(net);
1025 tcp6_proc_exit(net);
1026 ac6_proc_exit(net);
1027 #endif
1028 ipv6_cleanup_mibs(net);
1029 }
1030
1031 static struct pernet_operations inet6_net_ops = {
1032 .init = inet6_net_init,
1033 .exit = inet6_net_exit,
1034 };
1035
ipv6_route_input(struct sk_buff * skb)1036 static int ipv6_route_input(struct sk_buff *skb)
1037 {
1038 ip6_route_input(skb);
1039 return skb_dst(skb)->error;
1040 }
1041
1042 static const struct ipv6_stub ipv6_stub_impl = {
1043 .ipv6_sock_mc_join = ipv6_sock_mc_join,
1044 .ipv6_sock_mc_drop = ipv6_sock_mc_drop,
1045 .ipv6_dst_lookup_flow = ip6_dst_lookup_flow,
1046 .ipv6_route_input = ipv6_route_input,
1047 .fib6_get_table = fib6_get_table,
1048 .fib6_table_lookup = fib6_table_lookup,
1049 .fib6_lookup = fib6_lookup,
1050 .fib6_select_path = fib6_select_path,
1051 .ip6_mtu_from_fib6 = ip6_mtu_from_fib6,
1052 .fib6_nh_init = fib6_nh_init,
1053 .fib6_nh_release = fib6_nh_release,
1054 .fib6_nh_release_dsts = fib6_nh_release_dsts,
1055 .fib6_update_sernum = fib6_update_sernum_stub,
1056 .fib6_rt_update = fib6_rt_update,
1057 .ip6_del_rt = ip6_del_rt,
1058 .udpv6_encap_enable = udpv6_encap_enable,
1059 .ndisc_send_na = ndisc_send_na,
1060 #if IS_ENABLED(CONFIG_XFRM)
1061 .xfrm6_local_rxpmtu = xfrm6_local_rxpmtu,
1062 .xfrm6_udp_encap_rcv = xfrm6_udp_encap_rcv,
1063 .xfrm6_gro_udp_encap_rcv = xfrm6_gro_udp_encap_rcv,
1064 .xfrm6_rcv_encap = xfrm6_rcv_encap,
1065 #endif
1066 .nd_tbl = &nd_tbl,
1067 .ipv6_fragment = ip6_fragment,
1068 .ipv6_dev_find = ipv6_dev_find,
1069 .ip6_xmit = ip6_xmit,
1070 };
1071
1072 static const struct ipv6_bpf_stub ipv6_bpf_stub_impl = {
1073 .inet6_bind = __inet6_bind,
1074 .udp6_lib_lookup = __udp6_lib_lookup,
1075 .ipv6_setsockopt = do_ipv6_setsockopt,
1076 .ipv6_getsockopt = do_ipv6_getsockopt,
1077 .ipv6_dev_get_saddr = ipv6_dev_get_saddr,
1078 };
1079
inet6_init(void)1080 static int __init inet6_init(void)
1081 {
1082 struct list_head *r;
1083 int err = 0;
1084
1085 sock_skb_cb_check_size(sizeof(struct inet6_skb_parm));
1086
1087 /* Register the socket-side information for inet6_create. */
1088 for (r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r)
1089 INIT_LIST_HEAD(r);
1090
1091 raw_hashinfo_init(&raw_v6_hashinfo);
1092
1093 if (disable_ipv6_mod) {
1094 pr_info("Loaded, but administratively disabled, reboot required to enable\n");
1095 goto out;
1096 }
1097
1098 err = proto_register(&tcpv6_prot, 1);
1099 if (err)
1100 goto out;
1101
1102 err = proto_register(&udpv6_prot, 1);
1103 if (err)
1104 goto out_unregister_tcp_proto;
1105
1106 err = proto_register(&udplitev6_prot, 1);
1107 if (err)
1108 goto out_unregister_udp_proto;
1109
1110 err = proto_register(&rawv6_prot, 1);
1111 if (err)
1112 goto out_unregister_udplite_proto;
1113
1114 err = proto_register(&pingv6_prot, 1);
1115 if (err)
1116 goto out_unregister_raw_proto;
1117
1118 /* We MUST register RAW sockets before we create the ICMP6,
1119 * IGMP6, or NDISC control sockets.
1120 */
1121 err = rawv6_init();
1122 if (err)
1123 goto out_unregister_ping_proto;
1124
1125 /* Register the family here so that the init calls below will
1126 * be able to create sockets. (?? is this dangerous ??)
1127 */
1128 err = sock_register(&inet6_family_ops);
1129 if (err)
1130 goto out_sock_register_fail;
1131
1132 /*
1133 * ipngwg API draft makes clear that the correct semantics
1134 * for TCP and UDP is to consider one TCP and UDP instance
1135 * in a host available by both INET and INET6 APIs and
1136 * able to communicate via both network protocols.
1137 */
1138
1139 err = register_pernet_subsys(&inet6_net_ops);
1140 if (err)
1141 goto register_pernet_fail;
1142 err = ip6_mr_init();
1143 if (err)
1144 goto ipmr_fail;
1145 err = icmpv6_init();
1146 if (err)
1147 goto icmp_fail;
1148 err = ndisc_init();
1149 if (err)
1150 goto ndisc_fail;
1151 err = igmp6_init();
1152 if (err)
1153 goto igmp_fail;
1154
1155 err = ipv6_netfilter_init();
1156 if (err)
1157 goto netfilter_fail;
1158 /* Create /proc/foo6 entries. */
1159 #ifdef CONFIG_PROC_FS
1160 err = -ENOMEM;
1161 if (raw6_proc_init())
1162 goto proc_raw6_fail;
1163 if (udplite6_proc_init())
1164 goto proc_udplite6_fail;
1165 if (ipv6_misc_proc_init())
1166 goto proc_misc6_fail;
1167 if (if6_proc_init())
1168 goto proc_if6_fail;
1169 #endif
1170 err = ip6_route_init();
1171 if (err)
1172 goto ip6_route_fail;
1173 err = ndisc_late_init();
1174 if (err)
1175 goto ndisc_late_fail;
1176 err = ip6_flowlabel_init();
1177 if (err)
1178 goto ip6_flowlabel_fail;
1179 err = ipv6_anycast_init();
1180 if (err)
1181 goto ipv6_anycast_fail;
1182 err = addrconf_init();
1183 if (err)
1184 goto addrconf_fail;
1185
1186 /* Init v6 extension headers. */
1187 err = ipv6_exthdrs_init();
1188 if (err)
1189 goto ipv6_exthdrs_fail;
1190
1191 err = ipv6_frag_init();
1192 if (err)
1193 goto ipv6_frag_fail;
1194
1195 /* Init v6 transport protocols. */
1196 err = udpv6_init();
1197 if (err)
1198 goto udpv6_fail;
1199
1200 err = udplitev6_init();
1201 if (err)
1202 goto udplitev6_fail;
1203
1204 err = udpv6_offload_init();
1205 if (err)
1206 goto udpv6_offload_fail;
1207
1208 err = tcpv6_init();
1209 if (err)
1210 goto tcpv6_fail;
1211
1212 err = ipv6_packet_init();
1213 if (err)
1214 goto ipv6_packet_fail;
1215
1216 err = pingv6_init();
1217 if (err)
1218 goto pingv6_fail;
1219
1220 err = calipso_init();
1221 if (err)
1222 goto calipso_fail;
1223
1224 err = seg6_init();
1225 if (err)
1226 goto seg6_fail;
1227
1228 err = rpl_init();
1229 if (err)
1230 goto rpl_fail;
1231
1232 err = ioam6_init();
1233 if (err)
1234 goto ioam6_fail;
1235
1236 err = igmp6_late_init();
1237 if (err)
1238 goto igmp6_late_err;
1239
1240 #ifdef CONFIG_SYSCTL
1241 err = ipv6_sysctl_register();
1242 if (err)
1243 goto sysctl_fail;
1244 #endif
1245
1246 /* ensure that ipv6 stubs are visible only after ipv6 is ready */
1247 wmb();
1248 ipv6_stub = &ipv6_stub_impl;
1249 ipv6_bpf_stub = &ipv6_bpf_stub_impl;
1250 out:
1251 return err;
1252
1253 #ifdef CONFIG_SYSCTL
1254 sysctl_fail:
1255 igmp6_late_cleanup();
1256 #endif
1257 igmp6_late_err:
1258 ioam6_exit();
1259 ioam6_fail:
1260 rpl_exit();
1261 rpl_fail:
1262 seg6_exit();
1263 seg6_fail:
1264 calipso_exit();
1265 calipso_fail:
1266 pingv6_exit();
1267 pingv6_fail:
1268 ipv6_packet_cleanup();
1269 ipv6_packet_fail:
1270 tcpv6_exit();
1271 tcpv6_fail:
1272 udpv6_offload_exit();
1273 udpv6_offload_fail:
1274 udplitev6_exit();
1275 udplitev6_fail:
1276 udpv6_exit();
1277 udpv6_fail:
1278 ipv6_frag_exit();
1279 ipv6_frag_fail:
1280 ipv6_exthdrs_exit();
1281 ipv6_exthdrs_fail:
1282 addrconf_cleanup();
1283 addrconf_fail:
1284 ipv6_anycast_cleanup();
1285 ipv6_anycast_fail:
1286 ip6_flowlabel_cleanup();
1287 ip6_flowlabel_fail:
1288 ndisc_late_cleanup();
1289 ndisc_late_fail:
1290 ip6_route_cleanup();
1291 ip6_route_fail:
1292 #ifdef CONFIG_PROC_FS
1293 if6_proc_exit();
1294 proc_if6_fail:
1295 ipv6_misc_proc_exit();
1296 proc_misc6_fail:
1297 udplite6_proc_exit();
1298 proc_udplite6_fail:
1299 raw6_proc_exit();
1300 proc_raw6_fail:
1301 #endif
1302 ipv6_netfilter_fini();
1303 netfilter_fail:
1304 igmp6_cleanup();
1305 igmp_fail:
1306 ndisc_cleanup();
1307 ndisc_fail:
1308 icmpv6_cleanup();
1309 icmp_fail:
1310 ip6_mr_cleanup();
1311 ipmr_fail:
1312 unregister_pernet_subsys(&inet6_net_ops);
1313 register_pernet_fail:
1314 sock_unregister(PF_INET6);
1315 rtnl_unregister_all(PF_INET6);
1316 out_sock_register_fail:
1317 rawv6_exit();
1318 out_unregister_ping_proto:
1319 proto_unregister(&pingv6_prot);
1320 out_unregister_raw_proto:
1321 proto_unregister(&rawv6_prot);
1322 out_unregister_udplite_proto:
1323 proto_unregister(&udplitev6_prot);
1324 out_unregister_udp_proto:
1325 proto_unregister(&udpv6_prot);
1326 out_unregister_tcp_proto:
1327 proto_unregister(&tcpv6_prot);
1328 goto out;
1329 }
1330 module_init(inet6_init);
1331
1332 MODULE_ALIAS_NETPROTO(PF_INET6);
1333