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
72 #include "ip6_offload.h"
73
74 MODULE_AUTHOR("Cast of dozens");
75 MODULE_DESCRIPTION("IPv6 protocol stack for Linux");
76 MODULE_LICENSE("GPL");
77
78 /* The inetsw6 table contains everything that inet6_create needs to
79 * build a new socket.
80 */
81 static struct list_head inetsw6[SOCK_MAX];
82 static DEFINE_SPINLOCK(inetsw6_lock);
83
84 struct ipv6_params ipv6_defaults = {
85 .disable_ipv6 = 0,
86 .autoconf = 1,
87 };
88
89 module_param_named(disable, disable_ipv6_mod, int, 0444);
90 MODULE_PARM_DESC(disable, "Disable IPv6 module such that it is non-functional");
91
92 module_param_named(disable_ipv6, ipv6_defaults.disable_ipv6, int, 0444);
93 MODULE_PARM_DESC(disable_ipv6, "Disable IPv6 on all interfaces");
94
95 module_param_named(autoconf, ipv6_defaults.autoconf, int, 0444);
96 MODULE_PARM_DESC(autoconf, "Enable IPv6 address autoconfiguration on all interfaces");
97
inet6_sk_generic(struct sock * sk)98 static struct ipv6_pinfo *inet6_sk_generic(struct sock *sk)
99 {
100 const int offset = sk->sk_prot->ipv6_pinfo_offset;
101
102 return (struct ipv6_pinfo *)(((u8 *)sk) + offset);
103 }
104
inet6_sock_destruct(struct sock * sk)105 void inet6_sock_destruct(struct sock *sk)
106 {
107 inet6_cleanup_sock(sk);
108 inet_sock_destruct(sk);
109 }
110 EXPORT_SYMBOL_GPL(inet6_sock_destruct);
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 if (INET_PROTOSW_ICSK & answer_flags)
196 inet_init_csk_locks(sk);
197
198 inet = inet_sk(sk);
199 inet_assign_bit(IS_ICSK, sk, INET_PROTOSW_ICSK & answer_flags);
200
201 if (SOCK_RAW == sock->type) {
202 inet->inet_num = protocol;
203 if (IPPROTO_RAW == protocol)
204 inet_set_bit(HDRINCL, sk);
205 }
206
207 sk->sk_destruct = inet6_sock_destruct;
208 sk->sk_family = PF_INET6;
209 sk->sk_protocol = protocol;
210
211 sk->sk_backlog_rcv = answer->prot->backlog_rcv;
212
213 inet_sk(sk)->pinet6 = np = inet6_sk_generic(sk);
214 np->hop_limit = -1;
215 np->mcast_hops = IPV6_DEFAULT_MCASTHOPS;
216 inet6_set_bit(MC6_LOOP, sk);
217 inet6_set_bit(MC6_ALL, sk);
218 np->pmtudisc = IPV6_PMTUDISC_WANT;
219 inet6_assign_bit(REPFLOW, sk, READ_ONCE(net->ipv6.sysctl.flowlabel_reflect) &
220 FLOWLABEL_REFLECT_ESTABLISHED);
221 sk->sk_ipv6only = net->ipv6.sysctl.bindv6only;
222 sk->sk_txrehash = READ_ONCE(net->core.sysctl_txrehash);
223
224 /* Init the ipv4 part of the socket since we can have sockets
225 * using v6 API for ipv4.
226 */
227 inet->uc_ttl = -1;
228
229 inet_set_bit(MC_LOOP, sk);
230 inet->mc_ttl = 1;
231 inet->mc_index = 0;
232 RCU_INIT_POINTER(inet->mc_list, NULL);
233 inet->rcv_tos = 0;
234
235 if (READ_ONCE(net->ipv4.sysctl_ip_no_pmtu_disc))
236 inet->pmtudisc = IP_PMTUDISC_DONT;
237 else
238 inet->pmtudisc = IP_PMTUDISC_WANT;
239
240 if (inet->inet_num) {
241 /* It assumes that any protocol which allows
242 * the user to assign a number at socket
243 * creation time automatically shares.
244 */
245 inet->inet_sport = htons(inet->inet_num);
246 err = sk->sk_prot->hash(sk);
247 if (err)
248 goto out_sk_release;
249 }
250 if (sk->sk_prot->init) {
251 err = sk->sk_prot->init(sk);
252 if (err)
253 goto out_sk_release;
254 }
255
256 if (!kern) {
257 err = BPF_CGROUP_RUN_PROG_INET_SOCK(sk);
258 if (err)
259 goto out_sk_release;
260 }
261 out:
262 return err;
263 out_rcu_unlock:
264 rcu_read_unlock();
265 goto out;
266 out_sk_release:
267 sk_common_release(sk);
268 sock->sk = NULL;
269 goto out;
270 }
271
__inet6_bind(struct sock * sk,struct sockaddr_unsized * uaddr,int addr_len,u32 flags)272 static int __inet6_bind(struct sock *sk, struct sockaddr_unsized *uaddr, int addr_len,
273 u32 flags)
274 {
275 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)uaddr;
276 struct inet_sock *inet = inet_sk(sk);
277 struct ipv6_pinfo *np = inet6_sk(sk);
278 struct net *net = sock_net(sk);
279 __be32 v4addr = 0;
280 unsigned short snum;
281 bool saved_ipv6only;
282 int addr_type = 0;
283 int err = 0;
284
285 if (addr->sin6_family != AF_INET6)
286 return -EAFNOSUPPORT;
287
288 addr_type = ipv6_addr_type(&addr->sin6_addr);
289 if ((addr_type & IPV6_ADDR_MULTICAST) && sk->sk_type == SOCK_STREAM)
290 return -EINVAL;
291
292 snum = ntohs(addr->sin6_port);
293 if (!(flags & BIND_NO_CAP_NET_BIND_SERVICE) &&
294 snum && inet_port_requires_bind_service(net, snum) &&
295 !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE))
296 return -EACCES;
297
298 if (flags & BIND_WITH_LOCK)
299 lock_sock(sk);
300
301 /* Check these errors (active socket, double bind). */
302 if (sk->sk_state != TCP_CLOSE || inet->inet_num) {
303 err = -EINVAL;
304 goto out;
305 }
306
307 /* Check if the address belongs to the host. */
308 if (addr_type == IPV6_ADDR_MAPPED) {
309 struct net_device *dev = NULL;
310 int chk_addr_ret;
311
312 /* Binding to v4-mapped address on a v6-only socket
313 * makes no sense
314 */
315 if (ipv6_only_sock(sk)) {
316 err = -EINVAL;
317 goto out;
318 }
319
320 rcu_read_lock();
321 if (sk->sk_bound_dev_if) {
322 dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if);
323 if (!dev) {
324 err = -ENODEV;
325 goto out_unlock;
326 }
327 }
328
329 /* Reproduce AF_INET checks to make the bindings consistent */
330 v4addr = addr->sin6_addr.s6_addr32[3];
331 chk_addr_ret = inet_addr_type_dev_table(net, dev, v4addr);
332 rcu_read_unlock();
333
334 if (!inet_addr_valid_or_nonlocal(net, inet, v4addr,
335 chk_addr_ret)) {
336 err = -EADDRNOTAVAIL;
337 goto out;
338 }
339 } else {
340 if (addr_type != IPV6_ADDR_ANY) {
341 struct net_device *dev = NULL;
342
343 rcu_read_lock();
344 if (__ipv6_addr_needs_scope_id(addr_type)) {
345 if (addr_len >= sizeof(struct sockaddr_in6) &&
346 addr->sin6_scope_id) {
347 /* Override any existing binding, if another one
348 * is supplied by user.
349 */
350 sk->sk_bound_dev_if = addr->sin6_scope_id;
351 }
352
353 /* Binding to link-local address requires an interface */
354 if (!sk->sk_bound_dev_if) {
355 err = -EINVAL;
356 goto out_unlock;
357 }
358 }
359
360 if (sk->sk_bound_dev_if) {
361 dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if);
362 if (!dev) {
363 err = -ENODEV;
364 goto out_unlock;
365 }
366 }
367
368 /* ipv4 addr of the socket is invalid. Only the
369 * unspecified and mapped address have a v4 equivalent.
370 */
371 v4addr = LOOPBACK4_IPV6;
372 if (!(addr_type & IPV6_ADDR_MULTICAST)) {
373 if (!ipv6_can_nonlocal_bind(net, inet) &&
374 !ipv6_chk_addr(net, &addr->sin6_addr,
375 dev, 0)) {
376 err = -EADDRNOTAVAIL;
377 goto out_unlock;
378 }
379 }
380 rcu_read_unlock();
381 }
382 }
383
384 inet->inet_rcv_saddr = v4addr;
385 inet->inet_saddr = v4addr;
386
387 sk->sk_v6_rcv_saddr = addr->sin6_addr;
388
389 if (!(addr_type & IPV6_ADDR_MULTICAST))
390 np->saddr = addr->sin6_addr;
391
392 saved_ipv6only = sk->sk_ipv6only;
393 if (addr_type != IPV6_ADDR_ANY && addr_type != IPV6_ADDR_MAPPED)
394 sk->sk_ipv6only = 1;
395
396 /* Make sure we are allowed to bind here. */
397 if (snum || !(inet_test_bit(BIND_ADDRESS_NO_PORT, sk) ||
398 (flags & BIND_FORCE_ADDRESS_NO_PORT))) {
399 err = sk->sk_prot->get_port(sk, snum);
400 if (err) {
401 sk->sk_ipv6only = saved_ipv6only;
402 inet_reset_saddr(sk);
403 goto out;
404 }
405 if (!(flags & BIND_FROM_BPF)) {
406 err = BPF_CGROUP_RUN_PROG_INET6_POST_BIND(sk);
407 if (err) {
408 sk->sk_ipv6only = saved_ipv6only;
409 inet_reset_saddr(sk);
410 if (sk->sk_prot->put_port)
411 sk->sk_prot->put_port(sk);
412 goto out;
413 }
414 }
415 }
416
417 if (addr_type != IPV6_ADDR_ANY)
418 sk->sk_userlocks |= SOCK_BINDADDR_LOCK;
419 if (snum)
420 sk->sk_userlocks |= SOCK_BINDPORT_LOCK;
421 inet->inet_sport = htons(inet->inet_num);
422 inet->inet_dport = 0;
423 inet->inet_daddr = 0;
424 out:
425 if (flags & BIND_WITH_LOCK)
426 release_sock(sk);
427 return err;
428 out_unlock:
429 rcu_read_unlock();
430 goto out;
431 }
432
inet6_bind_sk(struct sock * sk,struct sockaddr_unsized * uaddr,int addr_len)433 int inet6_bind_sk(struct sock *sk, struct sockaddr_unsized *uaddr, int addr_len)
434 {
435 u32 flags = BIND_WITH_LOCK;
436 const struct proto *prot;
437 int err = 0;
438
439 /* IPV6_ADDRFORM can change sk->sk_prot under us. */
440 prot = READ_ONCE(sk->sk_prot);
441 /* If the socket has its own bind function then use it. */
442 if (prot->bind)
443 return prot->bind(sk, uaddr, addr_len);
444
445 if (addr_len < SIN6_LEN_RFC2133)
446 return -EINVAL;
447
448 /* BPF prog is run before any checks are done so that if the prog
449 * changes context in a wrong way it will be caught.
450 */
451 err = BPF_CGROUP_RUN_PROG_INET_BIND_LOCK(sk, uaddr, &addr_len,
452 CGROUP_INET6_BIND, &flags);
453 if (err)
454 return err;
455
456 return __inet6_bind(sk, uaddr, addr_len, flags);
457 }
458
459 /* bind for INET6 API */
inet6_bind(struct socket * sock,struct sockaddr_unsized * uaddr,int addr_len)460 int inet6_bind(struct socket *sock, struct sockaddr_unsized *uaddr, int addr_len)
461 {
462 return inet6_bind_sk(sock->sk, uaddr, addr_len);
463 }
464 EXPORT_SYMBOL(inet6_bind);
465
inet6_release(struct socket * sock)466 int inet6_release(struct socket *sock)
467 {
468 struct sock *sk = sock->sk;
469
470 if (!sk)
471 return -EINVAL;
472
473 /* Free mc lists */
474 ipv6_sock_mc_close(sk);
475
476 /* Free ac lists */
477 ipv6_sock_ac_close(sk);
478
479 return inet_release(sock);
480 }
481 EXPORT_SYMBOL(inet6_release);
482
inet6_cleanup_sock(struct sock * sk)483 void inet6_cleanup_sock(struct sock *sk)
484 {
485 struct ipv6_pinfo *np = inet6_sk(sk);
486 struct sk_buff *skb;
487 struct ipv6_txoptions *opt;
488
489 /* Release rx options */
490
491 skb = xchg(&np->pktoptions, NULL);
492 kfree_skb(skb);
493
494 skb = xchg(&np->rxpmtu, NULL);
495 kfree_skb(skb);
496
497 /* Free flowlabels */
498 fl6_free_socklist(sk);
499
500 /* Free tx options */
501
502 opt = unrcu_pointer(xchg(&np->opt, NULL));
503 if (opt) {
504 atomic_sub(opt->tot_len, &sk->sk_omem_alloc);
505 txopt_put(opt);
506 }
507 }
508 EXPORT_SYMBOL_GPL(inet6_cleanup_sock);
509
510 /*
511 * This does both peername and sockname.
512 */
inet6_getname(struct socket * sock,struct sockaddr * uaddr,int peer)513 int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
514 int peer)
515 {
516 struct sockaddr_in6 *sin = (struct sockaddr_in6 *)uaddr;
517 int sin_addr_len = sizeof(*sin);
518 struct sock *sk = sock->sk;
519 struct inet_sock *inet = inet_sk(sk);
520 struct ipv6_pinfo *np = inet6_sk(sk);
521
522 sin->sin6_family = AF_INET6;
523 sin->sin6_flowinfo = 0;
524 sin->sin6_scope_id = 0;
525 lock_sock(sk);
526 if (peer) {
527 if (!inet->inet_dport ||
528 (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) &&
529 peer == 1)) {
530 release_sock(sk);
531 return -ENOTCONN;
532 }
533 sin->sin6_port = inet->inet_dport;
534 sin->sin6_addr = sk->sk_v6_daddr;
535 if (inet6_test_bit(SNDFLOW, sk))
536 sin->sin6_flowinfo = np->flow_label;
537 BPF_CGROUP_RUN_SA_PROG(sk, (struct sockaddr *)sin, &sin_addr_len,
538 CGROUP_INET6_GETPEERNAME);
539 } else {
540 if (ipv6_addr_any(&sk->sk_v6_rcv_saddr))
541 sin->sin6_addr = np->saddr;
542 else
543 sin->sin6_addr = sk->sk_v6_rcv_saddr;
544 sin->sin6_port = inet->inet_sport;
545 BPF_CGROUP_RUN_SA_PROG(sk, (struct sockaddr *)sin, &sin_addr_len,
546 CGROUP_INET6_GETSOCKNAME);
547 }
548 sin->sin6_scope_id = ipv6_iface_scope_id(&sin->sin6_addr,
549 sk->sk_bound_dev_if);
550 release_sock(sk);
551 return sin_addr_len;
552 }
553 EXPORT_SYMBOL(inet6_getname);
554
inet6_ioctl(struct socket * sock,unsigned int cmd,unsigned long arg)555 int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
556 {
557 void __user *argp = (void __user *)arg;
558 struct sock *sk = sock->sk;
559 struct net *net = sock_net(sk);
560 const struct proto *prot;
561
562 switch (cmd) {
563 case SIOCADDRT:
564 case SIOCDELRT: {
565 struct in6_rtmsg rtmsg;
566
567 if (copy_from_user(&rtmsg, argp, sizeof(rtmsg)))
568 return -EFAULT;
569 return ipv6_route_ioctl(net, cmd, &rtmsg);
570 }
571 case SIOCSIFADDR:
572 return addrconf_add_ifaddr(net, argp);
573 case SIOCDIFADDR:
574 return addrconf_del_ifaddr(net, argp);
575 case SIOCSIFDSTADDR:
576 return addrconf_set_dstaddr(net, argp);
577 default:
578 /* IPV6_ADDRFORM can change sk->sk_prot under us. */
579 prot = READ_ONCE(sk->sk_prot);
580 if (!prot->ioctl)
581 return -ENOIOCTLCMD;
582 return sk_ioctl(sk, cmd, (void __user *)arg);
583 }
584 /*NOTREACHED*/
585 return 0;
586 }
587 EXPORT_SYMBOL(inet6_ioctl);
588
589 #ifdef CONFIG_COMPAT
590 struct compat_in6_rtmsg {
591 struct in6_addr rtmsg_dst;
592 struct in6_addr rtmsg_src;
593 struct in6_addr rtmsg_gateway;
594 u32 rtmsg_type;
595 u16 rtmsg_dst_len;
596 u16 rtmsg_src_len;
597 u32 rtmsg_metric;
598 u32 rtmsg_info;
599 u32 rtmsg_flags;
600 s32 rtmsg_ifindex;
601 };
602
inet6_compat_routing_ioctl(struct sock * sk,unsigned int cmd,struct compat_in6_rtmsg __user * ur)603 static int inet6_compat_routing_ioctl(struct sock *sk, unsigned int cmd,
604 struct compat_in6_rtmsg __user *ur)
605 {
606 struct in6_rtmsg rt;
607
608 if (copy_from_user(&rt.rtmsg_dst, &ur->rtmsg_dst,
609 3 * sizeof(struct in6_addr)) ||
610 get_user(rt.rtmsg_type, &ur->rtmsg_type) ||
611 get_user(rt.rtmsg_dst_len, &ur->rtmsg_dst_len) ||
612 get_user(rt.rtmsg_src_len, &ur->rtmsg_src_len) ||
613 get_user(rt.rtmsg_metric, &ur->rtmsg_metric) ||
614 get_user(rt.rtmsg_info, &ur->rtmsg_info) ||
615 get_user(rt.rtmsg_flags, &ur->rtmsg_flags) ||
616 get_user(rt.rtmsg_ifindex, &ur->rtmsg_ifindex))
617 return -EFAULT;
618
619
620 return ipv6_route_ioctl(sock_net(sk), cmd, &rt);
621 }
622
inet6_compat_ioctl(struct socket * sock,unsigned int cmd,unsigned long arg)623 int inet6_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
624 {
625 void __user *argp = compat_ptr(arg);
626 struct sock *sk = sock->sk;
627
628 switch (cmd) {
629 case SIOCADDRT:
630 case SIOCDELRT:
631 return inet6_compat_routing_ioctl(sk, cmd, argp);
632 default:
633 return -ENOIOCTLCMD;
634 }
635 }
636 EXPORT_SYMBOL_GPL(inet6_compat_ioctl);
637 #endif /* CONFIG_COMPAT */
638
639 INDIRECT_CALLABLE_DECLARE(int udpv6_sendmsg(struct sock *, struct msghdr *,
640 size_t));
inet6_sendmsg(struct socket * sock,struct msghdr * msg,size_t size)641 int inet6_sendmsg(struct socket *sock, struct msghdr *msg, size_t size)
642 {
643 struct sock *sk = sock->sk;
644 const struct proto *prot;
645
646 if (unlikely(inet_send_prepare(sk)))
647 return -EAGAIN;
648
649 /* IPV6_ADDRFORM can change sk->sk_prot under us. */
650 prot = READ_ONCE(sk->sk_prot);
651 return INDIRECT_CALL_2(prot->sendmsg, tcp_sendmsg, udpv6_sendmsg,
652 sk, msg, size);
653 }
654
655 INDIRECT_CALLABLE_DECLARE(int udpv6_recvmsg(struct sock *, struct msghdr *,
656 size_t, int, int *));
inet6_recvmsg(struct socket * sock,struct msghdr * msg,size_t size,int flags)657 int inet6_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
658 int flags)
659 {
660 struct sock *sk = sock->sk;
661 const struct proto *prot;
662 int addr_len = 0;
663 int err;
664
665 if (likely(!(flags & MSG_ERRQUEUE)))
666 sock_rps_record_flow(sk);
667
668 /* IPV6_ADDRFORM can change sk->sk_prot under us. */
669 prot = READ_ONCE(sk->sk_prot);
670 err = INDIRECT_CALL_2(prot->recvmsg, tcp_recvmsg, udpv6_recvmsg,
671 sk, msg, size, flags, &addr_len);
672 if (err >= 0)
673 msg->msg_namelen = addr_len;
674 return err;
675 }
676
677 const struct proto_ops inet6_stream_ops = {
678 .family = PF_INET6,
679 .owner = THIS_MODULE,
680 .release = inet6_release,
681 .bind = inet6_bind,
682 .connect = inet_stream_connect, /* ok */
683 .socketpair = sock_no_socketpair, /* a do nothing */
684 .accept = inet_accept, /* ok */
685 .getname = inet6_getname,
686 .poll = tcp_poll, /* ok */
687 .ioctl = inet6_ioctl, /* must change */
688 .gettstamp = sock_gettstamp,
689 .listen = inet_listen, /* ok */
690 .shutdown = inet_shutdown, /* ok */
691 .setsockopt = sock_common_setsockopt, /* ok */
692 .getsockopt = sock_common_getsockopt, /* ok */
693 .sendmsg = inet6_sendmsg, /* retpoline's sake */
694 .recvmsg = inet6_recvmsg, /* retpoline's sake */
695 #ifdef CONFIG_MMU
696 .mmap = tcp_mmap,
697 #endif
698 .splice_eof = inet_splice_eof,
699 .sendmsg_locked = tcp_sendmsg_locked,
700 .splice_read = tcp_splice_read,
701 .set_peek_off = sk_set_peek_off,
702 .read_sock = tcp_read_sock,
703 .read_skb = tcp_read_skb,
704 .peek_len = tcp_peek_len,
705 #ifdef CONFIG_COMPAT
706 .compat_ioctl = inet6_compat_ioctl,
707 #endif
708 .set_rcvlowat = tcp_set_rcvlowat,
709 };
710 EXPORT_SYMBOL_GPL(inet6_stream_ops);
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_skb = udp_read_skb,
731 .mmap = sock_no_mmap,
732 .set_peek_off = udp_set_peek_off,
733 #ifdef CONFIG_COMPAT
734 .compat_ioctl = inet6_compat_ioctl,
735 #endif
736 };
737
738 static const struct net_proto_family inet6_family_ops = {
739 .family = PF_INET6,
740 .create = inet6_create,
741 .owner = THIS_MODULE,
742 };
743
inet6_register_protosw(struct inet_protosw * p)744 int inet6_register_protosw(struct inet_protosw *p)
745 {
746 struct list_head *lh;
747 struct inet_protosw *answer;
748 struct list_head *last_perm;
749 int protocol = p->protocol;
750 int ret;
751
752 spin_lock_bh(&inetsw6_lock);
753
754 ret = -EINVAL;
755 if (p->type >= SOCK_MAX)
756 goto out_illegal;
757
758 /* If we are trying to override a permanent protocol, bail. */
759 answer = NULL;
760 ret = -EPERM;
761 last_perm = &inetsw6[p->type];
762 list_for_each(lh, &inetsw6[p->type]) {
763 answer = list_entry(lh, struct inet_protosw, list);
764
765 /* Check only the non-wild match. */
766 if (INET_PROTOSW_PERMANENT & answer->flags) {
767 if (protocol == answer->protocol)
768 break;
769 last_perm = lh;
770 }
771
772 answer = NULL;
773 }
774 if (answer)
775 goto out_permanent;
776
777 /* Add the new entry after the last permanent entry if any, so that
778 * the new entry does not override a permanent entry when matched with
779 * a wild-card protocol. But it is allowed to override any existing
780 * non-permanent entry. This means that when we remove this entry, the
781 * system automatically returns to the old behavior.
782 */
783 list_add_rcu(&p->list, last_perm);
784 ret = 0;
785 out:
786 spin_unlock_bh(&inetsw6_lock);
787 return ret;
788
789 out_permanent:
790 pr_err("Attempt to override permanent protocol %d\n", protocol);
791 goto out;
792
793 out_illegal:
794 pr_err("Ignoring attempt to register invalid socket type %d\n",
795 p->type);
796 goto out;
797 }
798 EXPORT_SYMBOL(inet6_register_protosw);
799
800 void
inet6_unregister_protosw(struct inet_protosw * p)801 inet6_unregister_protosw(struct inet_protosw *p)
802 {
803 if (INET_PROTOSW_PERMANENT & p->flags) {
804 pr_err("Attempt to unregister permanent protocol %d\n",
805 p->protocol);
806 } else {
807 spin_lock_bh(&inetsw6_lock);
808 list_del_rcu(&p->list);
809 spin_unlock_bh(&inetsw6_lock);
810
811 synchronize_net();
812 }
813 }
814 EXPORT_SYMBOL(inet6_unregister_protosw);
815
inet6_sk_rebuild_header(struct sock * sk)816 int inet6_sk_rebuild_header(struct sock *sk)
817 {
818 struct ipv6_pinfo *np = inet6_sk(sk);
819 struct inet_sock *inet = inet_sk(sk);
820 struct in6_addr *final_p;
821 struct dst_entry *dst;
822 struct flowi6 *fl6;
823
824 dst = __sk_dst_check(sk, np->dst_cookie);
825 if (dst)
826 return 0;
827
828 fl6 = &inet->cork.fl.u.ip6;
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_uid(sk);
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), &np->final);
843 rcu_read_unlock();
844
845 dst = ip6_dst_lookup_flow(sock_net(sk), sk, fl6, final_p);
846 if (IS_ERR(dst)) {
847 sk->sk_route_caps = 0;
848 WRITE_ONCE(sk->sk_err_soft, -PTR_ERR(dst));
849 return PTR_ERR(dst);
850 }
851
852 ip6_dst_store(sk, dst, false, false);
853 return 0;
854 }
855
ipv6_opt_accepted(const struct sock * sk,const struct sk_buff * skb,const struct inet6_skb_parm * opt)856 bool ipv6_opt_accepted(const struct sock *sk, const struct sk_buff *skb,
857 const struct inet6_skb_parm *opt)
858 {
859 const struct ipv6_pinfo *np = inet6_sk(sk);
860
861 if (np->rxopt.all) {
862 if (((opt->flags & IP6SKB_HOPBYHOP) &&
863 (np->rxopt.bits.hopopts || np->rxopt.bits.ohopopts)) ||
864 (ip6_flowinfo((struct ipv6hdr *) skb_network_header(skb)) &&
865 np->rxopt.bits.rxflow) ||
866 (opt->srcrt && (np->rxopt.bits.srcrt ||
867 np->rxopt.bits.osrcrt)) ||
868 ((opt->dst1 || opt->dst0) &&
869 (np->rxopt.bits.dstopts || np->rxopt.bits.odstopts)))
870 return true;
871 }
872 return false;
873 }
874
875 static struct packet_type ipv6_packet_type __read_mostly = {
876 .type = cpu_to_be16(ETH_P_IPV6),
877 .func = ipv6_rcv,
878 .list_func = ipv6_list_rcv,
879 };
880
ipv6_packet_init(void)881 static int __init ipv6_packet_init(void)
882 {
883 dev_add_pack(&ipv6_packet_type);
884 return 0;
885 }
886
ipv6_packet_cleanup(void)887 static void ipv6_packet_cleanup(void)
888 {
889 dev_remove_pack(&ipv6_packet_type);
890 }
891
ipv6_init_mibs(struct net * net)892 static int __net_init ipv6_init_mibs(struct net *net)
893 {
894 int i;
895
896 net->mib.udp_stats_in6 = alloc_percpu(struct udp_mib);
897 if (!net->mib.udp_stats_in6)
898 return -ENOMEM;
899 net->mib.udplite_stats_in6 = alloc_percpu(struct udp_mib);
900 if (!net->mib.udplite_stats_in6)
901 goto err_udplite_mib;
902 net->mib.ipv6_statistics = alloc_percpu(struct ipstats_mib);
903 if (!net->mib.ipv6_statistics)
904 goto err_ip_mib;
905
906 for_each_possible_cpu(i) {
907 struct ipstats_mib *af_inet6_stats;
908 af_inet6_stats = per_cpu_ptr(net->mib.ipv6_statistics, i);
909 u64_stats_init(&af_inet6_stats->syncp);
910 }
911
912
913 net->mib.icmpv6_statistics = alloc_percpu(struct icmpv6_mib);
914 if (!net->mib.icmpv6_statistics)
915 goto err_icmp_mib;
916 net->mib.icmpv6msg_statistics = kzalloc_obj(struct icmpv6msg_mib);
917 if (!net->mib.icmpv6msg_statistics)
918 goto err_icmpmsg_mib;
919 return 0;
920
921 err_icmpmsg_mib:
922 free_percpu(net->mib.icmpv6_statistics);
923 err_icmp_mib:
924 free_percpu(net->mib.ipv6_statistics);
925 err_ip_mib:
926 free_percpu(net->mib.udplite_stats_in6);
927 err_udplite_mib:
928 free_percpu(net->mib.udp_stats_in6);
929 return -ENOMEM;
930 }
931
ipv6_cleanup_mibs(struct net * net)932 static void ipv6_cleanup_mibs(struct net *net)
933 {
934 free_percpu(net->mib.udp_stats_in6);
935 free_percpu(net->mib.udplite_stats_in6);
936 free_percpu(net->mib.ipv6_statistics);
937 free_percpu(net->mib.icmpv6_statistics);
938 kfree(net->mib.icmpv6msg_statistics);
939 }
940
inet6_net_init(struct net * net)941 static int __net_init inet6_net_init(struct net *net)
942 {
943 int err = 0;
944
945 net->ipv6.sysctl.bindv6only = 0;
946 net->ipv6.sysctl.icmpv6_time = HZ / 10;
947 net->ipv6.sysctl.icmpv6_echo_ignore_all = 0;
948 net->ipv6.sysctl.icmpv6_echo_ignore_multicast = 0;
949 net->ipv6.sysctl.icmpv6_echo_ignore_anycast = 0;
950 net->ipv6.sysctl.icmpv6_error_anycast_as_unicast = 0;
951 net->ipv6.sysctl.icmpv6_errors_extension_mask = 0;
952
953 /* By default, rate limit error messages.
954 * Except for pmtu discovery, it would break it.
955 * proc_do_large_bitmap needs pointer to the bitmap.
956 */
957 bitmap_set(net->ipv6.sysctl.icmpv6_ratemask, 0, ICMPV6_ERRMSG_MAX + 1);
958 bitmap_clear(net->ipv6.sysctl.icmpv6_ratemask, ICMPV6_PKT_TOOBIG, 1);
959 net->ipv6.sysctl.icmpv6_ratemask_ptr = net->ipv6.sysctl.icmpv6_ratemask;
960
961 net->ipv6.sysctl.flowlabel_consistency = 1;
962 net->ipv6.sysctl.auto_flowlabels = IP6_DEFAULT_AUTO_FLOW_LABELS;
963 net->ipv6.sysctl.idgen_retries = 3;
964 net->ipv6.sysctl.idgen_delay = 1 * HZ;
965 net->ipv6.sysctl.flowlabel_state_ranges = 0;
966 net->ipv6.sysctl.max_dst_opts_cnt = IP6_DEFAULT_MAX_DST_OPTS_CNT;
967 net->ipv6.sysctl.max_hbh_opts_cnt = IP6_DEFAULT_MAX_HBH_OPTS_CNT;
968 net->ipv6.sysctl.max_dst_opts_len = IP6_DEFAULT_MAX_DST_OPTS_LEN;
969 net->ipv6.sysctl.max_hbh_opts_len = IP6_DEFAULT_MAX_HBH_OPTS_LEN;
970 net->ipv6.sysctl.fib_notify_on_flag_change = 0;
971 atomic_set(&net->ipv6.fib6_sernum, 1);
972
973 net->ipv6.sysctl.ioam6_id = IOAM6_DEFAULT_ID;
974 net->ipv6.sysctl.ioam6_id_wide = IOAM6_DEFAULT_ID_WIDE;
975
976 err = ipv6_init_mibs(net);
977 if (err)
978 return err;
979 #ifdef CONFIG_PROC_FS
980 err = udp6_proc_init(net);
981 if (err)
982 goto out;
983 err = tcp6_proc_init(net);
984 if (err)
985 goto proc_tcp6_fail;
986 err = ac6_proc_init(net);
987 if (err)
988 goto proc_ac6_fail;
989 #endif
990 return err;
991
992 #ifdef CONFIG_PROC_FS
993 proc_ac6_fail:
994 tcp6_proc_exit(net);
995 proc_tcp6_fail:
996 udp6_proc_exit(net);
997 out:
998 ipv6_cleanup_mibs(net);
999 return err;
1000 #endif
1001 }
1002
inet6_net_exit(struct net * net)1003 static void __net_exit inet6_net_exit(struct net *net)
1004 {
1005 #ifdef CONFIG_PROC_FS
1006 udp6_proc_exit(net);
1007 tcp6_proc_exit(net);
1008 ac6_proc_exit(net);
1009 #endif
1010 ipv6_cleanup_mibs(net);
1011 }
1012
1013 static struct pernet_operations inet6_net_ops = {
1014 .init = inet6_net_init,
1015 .exit = inet6_net_exit,
1016 };
1017
ipv6_route_input(struct sk_buff * skb)1018 static int ipv6_route_input(struct sk_buff *skb)
1019 {
1020 ip6_route_input(skb);
1021 return skb_dst(skb)->error;
1022 }
1023
1024 static const struct ipv6_stub ipv6_stub_impl = {
1025 .ipv6_sock_mc_join = ipv6_sock_mc_join,
1026 .ipv6_sock_mc_drop = ipv6_sock_mc_drop,
1027 .ipv6_dst_lookup_flow = ip6_dst_lookup_flow,
1028 .ipv6_route_input = ipv6_route_input,
1029 .fib6_get_table = fib6_get_table,
1030 .fib6_table_lookup = fib6_table_lookup,
1031 .fib6_lookup = fib6_lookup,
1032 .fib6_select_path = fib6_select_path,
1033 .ip6_mtu_from_fib6 = ip6_mtu_from_fib6,
1034 .fib6_nh_init = fib6_nh_init,
1035 .fib6_nh_release = fib6_nh_release,
1036 .fib6_nh_release_dsts = fib6_nh_release_dsts,
1037 .fib6_update_sernum = fib6_update_sernum_stub,
1038 .fib6_rt_update = fib6_rt_update,
1039 .ip6_del_rt = ip6_del_rt,
1040 .udpv6_encap_enable = udpv6_encap_enable,
1041 .ndisc_send_na = ndisc_send_na,
1042 #if IS_ENABLED(CONFIG_XFRM)
1043 .xfrm6_local_rxpmtu = xfrm6_local_rxpmtu,
1044 .xfrm6_udp_encap_rcv = xfrm6_udp_encap_rcv,
1045 .xfrm6_gro_udp_encap_rcv = xfrm6_gro_udp_encap_rcv,
1046 .xfrm6_rcv_encap = xfrm6_rcv_encap,
1047 #endif
1048 .nd_tbl = &nd_tbl,
1049 .ipv6_fragment = ip6_fragment,
1050 .ipv6_dev_find = ipv6_dev_find,
1051 .ip6_xmit = ip6_xmit,
1052 };
1053
1054 static const struct ipv6_bpf_stub ipv6_bpf_stub_impl = {
1055 .inet6_bind = __inet6_bind,
1056 .udp6_lib_lookup = __udp6_lib_lookup,
1057 .ipv6_setsockopt = do_ipv6_setsockopt,
1058 .ipv6_getsockopt = do_ipv6_getsockopt,
1059 .ipv6_dev_get_saddr = ipv6_dev_get_saddr,
1060 };
1061
inet6_init(void)1062 static int __init inet6_init(void)
1063 {
1064 struct list_head *r;
1065 int err = 0;
1066
1067 sock_skb_cb_check_size(sizeof(struct inet6_skb_parm));
1068
1069 /* Register the socket-side information for inet6_create. */
1070 for (r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r)
1071 INIT_LIST_HEAD(r);
1072
1073 raw_hashinfo_init(&raw_v6_hashinfo);
1074
1075 if (disable_ipv6_mod) {
1076 pr_info("Loaded, but administratively disabled, reboot required to enable\n");
1077 goto out;
1078 }
1079
1080 err = proto_register(&tcpv6_prot, 1);
1081 if (err)
1082 goto out;
1083
1084 err = proto_register(&udpv6_prot, 1);
1085 if (err)
1086 goto out_unregister_tcp_proto;
1087
1088 err = proto_register(&udplitev6_prot, 1);
1089 if (err)
1090 goto out_unregister_udp_proto;
1091
1092 err = proto_register(&rawv6_prot, 1);
1093 if (err)
1094 goto out_unregister_udplite_proto;
1095
1096 err = proto_register(&pingv6_prot, 1);
1097 if (err)
1098 goto out_unregister_raw_proto;
1099
1100 /* We MUST register RAW sockets before we create the ICMP6,
1101 * IGMP6, or NDISC control sockets.
1102 */
1103 err = rawv6_init();
1104 if (err)
1105 goto out_unregister_ping_proto;
1106
1107 /* Register the family here so that the init calls below will
1108 * be able to create sockets. (?? is this dangerous ??)
1109 */
1110 err = sock_register(&inet6_family_ops);
1111 if (err)
1112 goto out_sock_register_fail;
1113
1114 /*
1115 * ipngwg API draft makes clear that the correct semantics
1116 * for TCP and UDP is to consider one TCP and UDP instance
1117 * in a host available by both INET and INET6 APIs and
1118 * able to communicate via both network protocols.
1119 */
1120
1121 err = register_pernet_subsys(&inet6_net_ops);
1122 if (err)
1123 goto register_pernet_fail;
1124 err = ip6_mr_init();
1125 if (err)
1126 goto ipmr_fail;
1127 err = icmpv6_init();
1128 if (err)
1129 goto icmp_fail;
1130 err = ndisc_init();
1131 if (err)
1132 goto ndisc_fail;
1133 err = igmp6_init();
1134 if (err)
1135 goto igmp_fail;
1136
1137 err = ipv6_netfilter_init();
1138 if (err)
1139 goto netfilter_fail;
1140 /* Create /proc/foo6 entries. */
1141 #ifdef CONFIG_PROC_FS
1142 err = -ENOMEM;
1143 if (raw6_proc_init())
1144 goto proc_raw6_fail;
1145 if (udplite6_proc_init())
1146 goto proc_udplite6_fail;
1147 if (ipv6_misc_proc_init())
1148 goto proc_misc6_fail;
1149 if (if6_proc_init())
1150 goto proc_if6_fail;
1151 #endif
1152 err = ip6_route_init();
1153 if (err)
1154 goto ip6_route_fail;
1155 err = ndisc_late_init();
1156 if (err)
1157 goto ndisc_late_fail;
1158 err = ip6_flowlabel_init();
1159 if (err)
1160 goto ip6_flowlabel_fail;
1161 err = ipv6_anycast_init();
1162 if (err)
1163 goto ipv6_anycast_fail;
1164 err = addrconf_init();
1165 if (err)
1166 goto addrconf_fail;
1167
1168 /* Init v6 extension headers. */
1169 err = ipv6_exthdrs_init();
1170 if (err)
1171 goto ipv6_exthdrs_fail;
1172
1173 err = ipv6_frag_init();
1174 if (err)
1175 goto ipv6_frag_fail;
1176
1177 /* Init v6 transport protocols. */
1178 err = udpv6_init();
1179 if (err)
1180 goto udpv6_fail;
1181
1182 err = udplitev6_init();
1183 if (err)
1184 goto udplitev6_fail;
1185
1186 err = udpv6_offload_init();
1187 if (err)
1188 goto udpv6_offload_fail;
1189
1190 err = tcpv6_init();
1191 if (err)
1192 goto tcpv6_fail;
1193
1194 err = ipv6_packet_init();
1195 if (err)
1196 goto ipv6_packet_fail;
1197
1198 err = pingv6_init();
1199 if (err)
1200 goto pingv6_fail;
1201
1202 err = calipso_init();
1203 if (err)
1204 goto calipso_fail;
1205
1206 err = seg6_init();
1207 if (err)
1208 goto seg6_fail;
1209
1210 err = rpl_init();
1211 if (err)
1212 goto rpl_fail;
1213
1214 err = ioam6_init();
1215 if (err)
1216 goto ioam6_fail;
1217
1218 err = igmp6_late_init();
1219 if (err)
1220 goto igmp6_late_err;
1221
1222 #ifdef CONFIG_SYSCTL
1223 err = ipv6_sysctl_register();
1224 if (err)
1225 goto sysctl_fail;
1226 #endif
1227
1228 /* ensure that ipv6 stubs are visible only after ipv6 is ready */
1229 wmb();
1230 ipv6_stub = &ipv6_stub_impl;
1231 ipv6_bpf_stub = &ipv6_bpf_stub_impl;
1232 out:
1233 return err;
1234
1235 #ifdef CONFIG_SYSCTL
1236 sysctl_fail:
1237 igmp6_late_cleanup();
1238 #endif
1239 igmp6_late_err:
1240 ioam6_exit();
1241 ioam6_fail:
1242 rpl_exit();
1243 rpl_fail:
1244 seg6_exit();
1245 seg6_fail:
1246 calipso_exit();
1247 calipso_fail:
1248 pingv6_exit();
1249 pingv6_fail:
1250 ipv6_packet_cleanup();
1251 ipv6_packet_fail:
1252 tcpv6_exit();
1253 tcpv6_fail:
1254 udpv6_offload_exit();
1255 udpv6_offload_fail:
1256 udplitev6_exit();
1257 udplitev6_fail:
1258 udpv6_exit();
1259 udpv6_fail:
1260 ipv6_frag_exit();
1261 ipv6_frag_fail:
1262 ipv6_exthdrs_exit();
1263 ipv6_exthdrs_fail:
1264 addrconf_cleanup();
1265 addrconf_fail:
1266 ipv6_anycast_cleanup();
1267 ipv6_anycast_fail:
1268 ip6_flowlabel_cleanup();
1269 ip6_flowlabel_fail:
1270 ndisc_late_cleanup();
1271 ndisc_late_fail:
1272 ip6_route_cleanup();
1273 ip6_route_fail:
1274 #ifdef CONFIG_PROC_FS
1275 if6_proc_exit();
1276 proc_if6_fail:
1277 ipv6_misc_proc_exit();
1278 proc_misc6_fail:
1279 udplite6_proc_exit();
1280 proc_udplite6_fail:
1281 raw6_proc_exit();
1282 proc_raw6_fail:
1283 #endif
1284 ipv6_netfilter_fini();
1285 netfilter_fail:
1286 igmp6_cleanup();
1287 igmp_fail:
1288 ndisc_cleanup();
1289 ndisc_fail:
1290 icmpv6_cleanup();
1291 icmp_fail:
1292 ip6_mr_cleanup();
1293 ipmr_fail:
1294 unregister_pernet_subsys(&inet6_net_ops);
1295 register_pernet_fail:
1296 sock_unregister(PF_INET6);
1297 rtnl_unregister_all(PF_INET6);
1298 out_sock_register_fail:
1299 rawv6_exit();
1300 out_unregister_ping_proto:
1301 proto_unregister(&pingv6_prot);
1302 out_unregister_raw_proto:
1303 proto_unregister(&rawv6_prot);
1304 out_unregister_udplite_proto:
1305 proto_unregister(&udplitev6_prot);
1306 out_unregister_udp_proto:
1307 proto_unregister(&udpv6_prot);
1308 out_unregister_tcp_proto:
1309 proto_unregister(&tcpv6_prot);
1310 goto out;
1311 }
1312 module_init(inet6_init);
1313
1314 MODULE_ALIAS_NETPROTO(PF_INET6);
1315