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
66 #include <linux/uaccess.h>
67 #include <linux/mroute6.h>
68
69 #include "ip6_offload.h"
70
71 MODULE_AUTHOR("Cast of dozens");
72 MODULE_DESCRIPTION("IPv6 protocol stack for Linux");
73 MODULE_LICENSE("GPL");
74
75 /* The inetsw6 table contains everything that inet6_create needs to
76 * build a new socket.
77 */
78 static struct list_head inetsw6[SOCK_MAX];
79 static DEFINE_SPINLOCK(inetsw6_lock);
80
81 struct ipv6_params ipv6_defaults = {
82 .disable_ipv6 = 0,
83 .autoconf = 1,
84 };
85
86 static int disable_ipv6_mod;
87
88 module_param_named(disable, disable_ipv6_mod, int, 0444);
89 MODULE_PARM_DESC(disable, "Disable IPv6 module such that it is non-functional");
90
91 module_param_named(disable_ipv6, ipv6_defaults.disable_ipv6, int, 0444);
92 MODULE_PARM_DESC(disable_ipv6, "Disable IPv6 on all interfaces");
93
94 module_param_named(autoconf, ipv6_defaults.autoconf, int, 0444);
95 MODULE_PARM_DESC(autoconf, "Enable IPv6 address autoconfiguration on all interfaces");
96
ipv6_mod_enabled(void)97 bool ipv6_mod_enabled(void)
98 {
99 return disable_ipv6_mod == 0;
100 }
101 EXPORT_SYMBOL_GPL(ipv6_mod_enabled);
102
inet6_sk_generic(struct sock *sk)103 static __inline__ struct ipv6_pinfo *inet6_sk_generic(struct sock *sk)
104 {
105 const int offset = sk->sk_prot->obj_size - sizeof(struct ipv6_pinfo);
106
107 return (struct ipv6_pinfo *)(((u8 *)sk) + offset);
108 }
109
inet6_sock_destruct(struct sock *sk)110 void inet6_sock_destruct(struct sock *sk)
111 {
112 inet6_cleanup_sock(sk);
113 inet_sock_destruct(sk);
114 }
115 EXPORT_SYMBOL_GPL(inet6_sock_destruct);
116
inet6_create(struct net *net, struct socket *sock, int protocol, int kern)117 static int inet6_create(struct net *net, struct socket *sock, int protocol,
118 int kern)
119 {
120 struct inet_sock *inet;
121 struct ipv6_pinfo *np;
122 struct sock *sk;
123 struct inet_protosw *answer;
124 struct proto *answer_prot;
125 unsigned char answer_flags;
126 int try_loading_module = 0;
127 int err;
128
129 if (protocol < 0 || protocol >= IPPROTO_MAX)
130 return -EINVAL;
131
132 /* Look for the requested type/protocol pair. */
133 lookup_protocol:
134 err = -ESOCKTNOSUPPORT;
135 rcu_read_lock();
136 list_for_each_entry_rcu(answer, &inetsw6[sock->type], list) {
137
138 err = 0;
139 /* Check the non-wild match. */
140 if (protocol == answer->protocol) {
141 if (protocol != IPPROTO_IP)
142 break;
143 } else {
144 /* Check for the two wild cases. */
145 if (IPPROTO_IP == protocol) {
146 protocol = answer->protocol;
147 break;
148 }
149 if (IPPROTO_IP == answer->protocol)
150 break;
151 }
152 err = -EPROTONOSUPPORT;
153 }
154
155 if (err) {
156 if (try_loading_module < 2) {
157 rcu_read_unlock();
158 /*
159 * Be more specific, e.g. net-pf-10-proto-132-type-1
160 * (net-pf-PF_INET6-proto-IPPROTO_SCTP-type-SOCK_STREAM)
161 */
162 if (++try_loading_module == 1)
163 request_module("net-pf-%d-proto-%d-type-%d",
164 PF_INET6, protocol, sock->type);
165 /*
166 * Fall back to generic, e.g. net-pf-10-proto-132
167 * (net-pf-PF_INET6-proto-IPPROTO_SCTP)
168 */
169 else
170 request_module("net-pf-%d-proto-%d",
171 PF_INET6, protocol);
172 goto lookup_protocol;
173 } else
174 goto out_rcu_unlock;
175 }
176
177 err = -EPERM;
178 if (sock->type == SOCK_RAW && !kern &&
179 !ns_capable(net->user_ns, CAP_NET_RAW))
180 goto out_rcu_unlock;
181
182 sock->ops = answer->ops;
183 answer_prot = answer->prot;
184 answer_flags = answer->flags;
185 rcu_read_unlock();
186
187 WARN_ON(!answer_prot->slab);
188
189 err = -ENOBUFS;
190 sk = sk_alloc(net, PF_INET6, GFP_KERNEL, answer_prot, kern);
191 if (!sk)
192 goto out;
193
194 sock_init_data(sock, sk);
195
196 err = 0;
197 if (INET_PROTOSW_REUSE & answer_flags)
198 sk->sk_reuse = SK_CAN_REUSE;
199
200 if (INET_PROTOSW_ICSK & answer_flags)
201 inet_init_csk_locks(sk);
202
203 inet = inet_sk(sk);
204 inet->is_icsk = (INET_PROTOSW_ICSK & answer_flags) != 0;
205
206 if (SOCK_RAW == sock->type) {
207 inet->inet_num = protocol;
208 if (IPPROTO_RAW == protocol)
209 inet->hdrincl = 1;
210 }
211
212 sk->sk_destruct = inet6_sock_destruct;
213 sk->sk_family = PF_INET6;
214 sk->sk_protocol = protocol;
215
216 sk->sk_backlog_rcv = answer->prot->backlog_rcv;
217
218 inet_sk(sk)->pinet6 = np = inet6_sk_generic(sk);
219 np->hop_limit = -1;
220 np->mcast_hops = IPV6_DEFAULT_MCASTHOPS;
221 np->mc_loop = 1;
222 np->mc_all = 1;
223 np->pmtudisc = IPV6_PMTUDISC_WANT;
224 np->repflow = net->ipv6.sysctl.flowlabel_reflect & FLOWLABEL_REFLECT_ESTABLISHED;
225 sk->sk_ipv6only = net->ipv6.sysctl.bindv6only;
226
227 /* Init the ipv4 part of the socket since we can have sockets
228 * using v6 API for ipv4.
229 */
230 inet->uc_ttl = -1;
231
232 inet->mc_loop = 1;
233 inet->mc_ttl = 1;
234 inet->mc_index = 0;
235 inet->mc_list = NULL;
236 inet->rcv_tos = 0;
237
238 if (READ_ONCE(net->ipv4.sysctl_ip_no_pmtu_disc))
239 inet->pmtudisc = IP_PMTUDISC_DONT;
240 else
241 inet->pmtudisc = IP_PMTUDISC_WANT;
242 /*
243 * Increment only the relevant sk_prot->socks debug field, this changes
244 * the previous behaviour of incrementing both the equivalent to
245 * answer->prot->socks (inet6_sock_nr) and inet_sock_nr.
246 *
247 * This allows better debug granularity as we'll know exactly how many
248 * UDPv6, TCPv6, etc socks were allocated, not the sum of all IPv6
249 * transport protocol socks. -acme
250 */
251 sk_refcnt_debug_inc(sk);
252
253 if (inet->inet_num) {
254 /* It assumes that any protocol which allows
255 * the user to assign a number at socket
256 * creation time automatically shares.
257 */
258 inet->inet_sport = htons(inet->inet_num);
259 err = sk->sk_prot->hash(sk);
260 if (err) {
261 sk_common_release(sk);
262 goto out;
263 }
264 }
265 if (sk->sk_prot->init) {
266 err = sk->sk_prot->init(sk);
267 if (err) {
268 sk_common_release(sk);
269 goto out;
270 }
271 }
272
273 if (!kern) {
274 err = BPF_CGROUP_RUN_PROG_INET_SOCK(sk);
275 if (err) {
276 sk_common_release(sk);
277 goto out;
278 }
279 }
280 out:
281 return err;
282 out_rcu_unlock:
283 rcu_read_unlock();
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 (snum && inet_port_requires_bind_service(net, snum) &&
309 !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE))
310 return -EACCES;
311
312 if (flags & BIND_WITH_LOCK)
313 lock_sock(sk);
314
315 /* Check these errors (active socket, double bind). */
316 if (sk->sk_state != TCP_CLOSE || inet->inet_num) {
317 err = -EINVAL;
318 goto out;
319 }
320
321 /* Check if the address belongs to the host. */
322 if (addr_type == IPV6_ADDR_MAPPED) {
323 struct net_device *dev = NULL;
324 int chk_addr_ret;
325
326 /* Binding to v4-mapped address on a v6-only socket
327 * makes no sense
328 */
329 if (sk->sk_ipv6only) {
330 err = -EINVAL;
331 goto out;
332 }
333
334 rcu_read_lock();
335 if (sk->sk_bound_dev_if) {
336 dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if);
337 if (!dev) {
338 err = -ENODEV;
339 goto out_unlock;
340 }
341 }
342
343 /* Reproduce AF_INET checks to make the bindings consistent */
344 v4addr = addr->sin6_addr.s6_addr32[3];
345 chk_addr_ret = inet_addr_type_dev_table(net, dev, v4addr);
346 rcu_read_unlock();
347
348 if (!inet_can_nonlocal_bind(net, inet) &&
349 v4addr != htonl(INADDR_ANY) &&
350 chk_addr_ret != RTN_LOCAL &&
351 chk_addr_ret != RTN_MULTICAST &&
352 chk_addr_ret != RTN_BROADCAST) {
353 err = -EADDRNOTAVAIL;
354 goto out;
355 }
356 } else {
357 if (addr_type != IPV6_ADDR_ANY) {
358 struct net_device *dev = NULL;
359
360 rcu_read_lock();
361 if (__ipv6_addr_needs_scope_id(addr_type)) {
362 if (addr_len >= sizeof(struct sockaddr_in6) &&
363 addr->sin6_scope_id) {
364 /* Override any existing binding, if another one
365 * is supplied by user.
366 */
367 sk->sk_bound_dev_if = addr->sin6_scope_id;
368 }
369
370 /* Binding to link-local address requires an interface */
371 if (!sk->sk_bound_dev_if) {
372 err = -EINVAL;
373 goto out_unlock;
374 }
375 }
376
377 if (sk->sk_bound_dev_if) {
378 dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if);
379 if (!dev) {
380 err = -ENODEV;
381 goto out_unlock;
382 }
383 }
384
385 /* ipv4 addr of the socket is invalid. Only the
386 * unspecified and mapped address have a v4 equivalent.
387 */
388 v4addr = LOOPBACK4_IPV6;
389 if (!(addr_type & IPV6_ADDR_MULTICAST)) {
390 if (!ipv6_can_nonlocal_bind(net, inet) &&
391 !ipv6_chk_addr(net, &addr->sin6_addr,
392 dev, 0)) {
393 err = -EADDRNOTAVAIL;
394 goto out_unlock;
395 }
396 }
397 rcu_read_unlock();
398 }
399 }
400
401 inet->inet_rcv_saddr = v4addr;
402 inet->inet_saddr = v4addr;
403
404 sk->sk_v6_rcv_saddr = addr->sin6_addr;
405
406 if (!(addr_type & IPV6_ADDR_MULTICAST))
407 np->saddr = addr->sin6_addr;
408
409 saved_ipv6only = sk->sk_ipv6only;
410 if (addr_type != IPV6_ADDR_ANY && addr_type != IPV6_ADDR_MAPPED)
411 sk->sk_ipv6only = 1;
412
413 /* Make sure we are allowed to bind here. */
414 if (snum || !(inet->bind_address_no_port ||
415 (flags & BIND_FORCE_ADDRESS_NO_PORT))) {
416 if (sk->sk_prot->get_port(sk, snum)) {
417 sk->sk_ipv6only = saved_ipv6only;
418 inet_reset_saddr(sk);
419 err = -EADDRINUSE;
420 goto out;
421 }
422 if (!(flags & BIND_FROM_BPF)) {
423 err = BPF_CGROUP_RUN_PROG_INET6_POST_BIND(sk);
424 if (err) {
425 sk->sk_ipv6only = saved_ipv6only;
426 inet_reset_saddr(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
448 /* bind for INET6 API */
inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)449 int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
450 {
451 struct sock *sk = sock->sk;
452 const struct proto *prot;
453 int err = 0;
454
455 /* If the socket has its own bind function then use it. */
456 prot = READ_ONCE(sk->sk_prot);
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_INET6_BIND(sk, uaddr);
467 if (err)
468 return err;
469
470 return __inet6_bind(sk, uaddr, addr_len, BIND_WITH_LOCK);
471 }
472 EXPORT_SYMBOL(inet6_bind);
473
inet6_release(struct socket *sock)474 int inet6_release(struct socket *sock)
475 {
476 struct sock *sk = sock->sk;
477
478 if (!sk)
479 return -EINVAL;
480
481 /* Free mc lists */
482 ipv6_sock_mc_close(sk);
483
484 /* Free ac lists */
485 ipv6_sock_ac_close(sk);
486
487 return inet_release(sock);
488 }
489 EXPORT_SYMBOL(inet6_release);
490
inet6_destroy_sock(struct sock *sk)491 void inet6_destroy_sock(struct sock *sk)
492 {
493 struct ipv6_pinfo *np = inet6_sk(sk);
494 struct sk_buff *skb;
495 struct ipv6_txoptions *opt;
496
497 /* Release rx options */
498
499 skb = xchg(&np->pktoptions, NULL);
500 kfree_skb(skb);
501
502 skb = xchg(&np->rxpmtu, NULL);
503 kfree_skb(skb);
504
505 /* Free flowlabels */
506 fl6_free_socklist(sk);
507
508 /* Free tx options */
509
510 opt = xchg((__force struct ipv6_txoptions **)&np->opt, NULL);
511 if (opt) {
512 atomic_sub(opt->tot_len, &sk->sk_omem_alloc);
513 txopt_put(opt);
514 }
515 }
516 EXPORT_SYMBOL_GPL(inet6_destroy_sock);
517
inet6_cleanup_sock(struct sock *sk)518 void inet6_cleanup_sock(struct sock *sk)
519 {
520 inet6_destroy_sock(sk);
521 }
522 EXPORT_SYMBOL_GPL(inet6_cleanup_sock);
523
524 /*
525 * This does both peername and sockname.
526 */
inet6_getname(struct socket *sock, struct sockaddr *uaddr, int peer)527 int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
528 int peer)
529 {
530 struct sockaddr_in6 *sin = (struct sockaddr_in6 *)uaddr;
531 struct sock *sk = sock->sk;
532 struct inet_sock *inet = inet_sk(sk);
533 struct ipv6_pinfo *np = inet6_sk(sk);
534
535 sin->sin6_family = AF_INET6;
536 sin->sin6_flowinfo = 0;
537 sin->sin6_scope_id = 0;
538 if (peer) {
539 if (!inet->inet_dport)
540 return -ENOTCONN;
541 if (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) &&
542 peer == 1)
543 return -ENOTCONN;
544 sin->sin6_port = inet->inet_dport;
545 sin->sin6_addr = sk->sk_v6_daddr;
546 if (np->sndflow)
547 sin->sin6_flowinfo = np->flow_label;
548 } else {
549 if (ipv6_addr_any(&sk->sk_v6_rcv_saddr))
550 sin->sin6_addr = np->saddr;
551 else
552 sin->sin6_addr = sk->sk_v6_rcv_saddr;
553 sin->sin6_port = inet->inet_sport;
554 }
555 if (cgroup_bpf_enabled)
556 BPF_CGROUP_RUN_SA_PROG_LOCK(sk, (struct sockaddr *)sin,
557 peer ? BPF_CGROUP_INET6_GETPEERNAME :
558 BPF_CGROUP_INET6_GETSOCKNAME,
559 NULL);
560 sin->sin6_scope_id = ipv6_iface_scope_id(&sin->sin6_addr,
561 sk->sk_bound_dev_if);
562 return sizeof(*sin);
563 }
564 EXPORT_SYMBOL(inet6_getname);
565
inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)566 int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
567 {
568 void __user *argp = (void __user *)arg;
569 struct sock *sk = sock->sk;
570 struct net *net = sock_net(sk);
571 const struct proto *prot;
572
573 switch (cmd) {
574 case SIOCADDRT:
575 case SIOCDELRT: {
576 struct in6_rtmsg rtmsg;
577
578 if (copy_from_user(&rtmsg, argp, sizeof(rtmsg)))
579 return -EFAULT;
580 return ipv6_route_ioctl(net, cmd, &rtmsg);
581 }
582 case SIOCSIFADDR:
583 return addrconf_add_ifaddr(net, argp);
584 case SIOCDIFADDR:
585 return addrconf_del_ifaddr(net, argp);
586 case SIOCSIFDSTADDR:
587 return addrconf_set_dstaddr(net, argp);
588 default:
589 /* IPV6_ADDRFORM can change sk->sk_prot under us. */
590 prot = READ_ONCE(sk->sk_prot);
591 if (!prot->ioctl)
592 return -ENOIOCTLCMD;
593 return prot->ioctl(sk, cmd, arg);
594 }
595 /*NOTREACHED*/
596 return 0;
597 }
598 EXPORT_SYMBOL(inet6_ioctl);
599
600 #ifdef CONFIG_COMPAT
601 struct compat_in6_rtmsg {
602 struct in6_addr rtmsg_dst;
603 struct in6_addr rtmsg_src;
604 struct in6_addr rtmsg_gateway;
605 u32 rtmsg_type;
606 u16 rtmsg_dst_len;
607 u16 rtmsg_src_len;
608 u32 rtmsg_metric;
609 u32 rtmsg_info;
610 u32 rtmsg_flags;
611 s32 rtmsg_ifindex;
612 };
613
inet6_compat_routing_ioctl(struct sock *sk, unsigned int cmd, struct compat_in6_rtmsg __user *ur)614 static int inet6_compat_routing_ioctl(struct sock *sk, unsigned int cmd,
615 struct compat_in6_rtmsg __user *ur)
616 {
617 struct in6_rtmsg rt;
618
619 if (copy_from_user(&rt.rtmsg_dst, &ur->rtmsg_dst,
620 3 * sizeof(struct in6_addr)) ||
621 get_user(rt.rtmsg_type, &ur->rtmsg_type) ||
622 get_user(rt.rtmsg_dst_len, &ur->rtmsg_dst_len) ||
623 get_user(rt.rtmsg_src_len, &ur->rtmsg_src_len) ||
624 get_user(rt.rtmsg_metric, &ur->rtmsg_metric) ||
625 get_user(rt.rtmsg_info, &ur->rtmsg_info) ||
626 get_user(rt.rtmsg_flags, &ur->rtmsg_flags) ||
627 get_user(rt.rtmsg_ifindex, &ur->rtmsg_ifindex))
628 return -EFAULT;
629
630
631 return ipv6_route_ioctl(sock_net(sk), cmd, &rt);
632 }
633
inet6_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)634 int inet6_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
635 {
636 void __user *argp = compat_ptr(arg);
637 struct sock *sk = sock->sk;
638
639 switch (cmd) {
640 case SIOCADDRT:
641 case SIOCDELRT:
642 return inet6_compat_routing_ioctl(sk, cmd, argp);
643 default:
644 return -ENOIOCTLCMD;
645 }
646 }
647 EXPORT_SYMBOL_GPL(inet6_compat_ioctl);
648 #endif /* CONFIG_COMPAT */
649
650 INDIRECT_CALLABLE_DECLARE(int udpv6_sendmsg(struct sock *, struct msghdr *,
651 size_t));
inet6_sendmsg(struct socket *sock, struct msghdr *msg, size_t size)652 int inet6_sendmsg(struct socket *sock, struct msghdr *msg, size_t size)
653 {
654 struct sock *sk = sock->sk;
655 const struct proto *prot;
656
657 if (unlikely(inet_send_prepare(sk)))
658 return -EAGAIN;
659
660 /* IPV6_ADDRFORM can change sk->sk_prot under us. */
661 prot = READ_ONCE(sk->sk_prot);
662 return INDIRECT_CALL_2(prot->sendmsg, tcp_sendmsg, udpv6_sendmsg,
663 sk, msg, size);
664 }
665
666 INDIRECT_CALLABLE_DECLARE(int udpv6_recvmsg(struct sock *, struct msghdr *,
667 size_t, int, int, int *));
inet6_recvmsg(struct socket *sock, struct msghdr *msg, size_t size, int flags)668 int inet6_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
669 int flags)
670 {
671 struct sock *sk = sock->sk;
672 const struct proto *prot;
673 int addr_len = 0;
674 int err;
675
676 if (likely(!(flags & MSG_ERRQUEUE)))
677 sock_rps_record_flow(sk);
678
679 /* IPV6_ADDRFORM can change sk->sk_prot under us. */
680 prot = READ_ONCE(sk->sk_prot);
681 err = INDIRECT_CALL_2(prot->recvmsg, tcp_recvmsg, udpv6_recvmsg,
682 sk, msg, size, flags & MSG_DONTWAIT,
683 flags & ~MSG_DONTWAIT, &addr_len);
684 if (err >= 0)
685 msg->msg_namelen = addr_len;
686 return err;
687 }
688
689 const struct proto_ops inet6_stream_ops = {
690 .family = PF_INET6,
691 .owner = THIS_MODULE,
692 .release = inet6_release,
693 .bind = inet6_bind,
694 .connect = inet_stream_connect, /* ok */
695 .socketpair = sock_no_socketpair, /* a do nothing */
696 .accept = inet_accept, /* ok */
697 .getname = inet6_getname,
698 .poll = tcp_poll, /* ok */
699 .ioctl = inet6_ioctl, /* must change */
700 .gettstamp = sock_gettstamp,
701 .listen = inet_listen, /* ok */
702 .shutdown = inet_shutdown, /* ok */
703 .setsockopt = sock_common_setsockopt, /* ok */
704 .getsockopt = sock_common_getsockopt, /* ok */
705 .sendmsg = inet6_sendmsg, /* retpoline's sake */
706 .recvmsg = inet6_recvmsg, /* retpoline's sake */
707 #ifdef CONFIG_MMU
708 .mmap = tcp_mmap,
709 #endif
710 .sendpage = inet_sendpage,
711 .sendmsg_locked = tcp_sendmsg_locked,
712 .sendpage_locked = tcp_sendpage_locked,
713 .splice_read = tcp_splice_read,
714 .read_sock = tcp_read_sock,
715 .peek_len = tcp_peek_len,
716 #ifdef CONFIG_COMPAT
717 .compat_ioctl = inet6_compat_ioctl,
718 #endif
719 .set_rcvlowat = tcp_set_rcvlowat,
720 };
721
722 const struct proto_ops inet6_dgram_ops = {
723 .family = PF_INET6,
724 .owner = THIS_MODULE,
725 .release = inet6_release,
726 .bind = inet6_bind,
727 .connect = inet_dgram_connect, /* ok */
728 .socketpair = sock_no_socketpair, /* a do nothing */
729 .accept = sock_no_accept, /* a do nothing */
730 .getname = inet6_getname,
731 .poll = udp_poll, /* ok */
732 .ioctl = inet6_ioctl, /* must change */
733 .gettstamp = sock_gettstamp,
734 .listen = sock_no_listen, /* ok */
735 .shutdown = inet_shutdown, /* ok */
736 .setsockopt = sock_common_setsockopt, /* ok */
737 .getsockopt = sock_common_getsockopt, /* ok */
738 .sendmsg = inet6_sendmsg, /* retpoline's sake */
739 .recvmsg = inet6_recvmsg, /* retpoline's sake */
740 .mmap = sock_no_mmap,
741 .sendpage = sock_no_sendpage,
742 .set_peek_off = sk_set_peek_off,
743 #ifdef CONFIG_COMPAT
744 .compat_ioctl = inet6_compat_ioctl,
745 #endif
746 };
747
748 static const struct net_proto_family inet6_family_ops = {
749 .family = PF_INET6,
750 .create = inet6_create,
751 .owner = THIS_MODULE,
752 };
753
inet6_register_protosw(struct inet_protosw *p)754 int inet6_register_protosw(struct inet_protosw *p)
755 {
756 struct list_head *lh;
757 struct inet_protosw *answer;
758 struct list_head *last_perm;
759 int protocol = p->protocol;
760 int ret;
761
762 spin_lock_bh(&inetsw6_lock);
763
764 ret = -EINVAL;
765 if (p->type >= SOCK_MAX)
766 goto out_illegal;
767
768 /* If we are trying to override a permanent protocol, bail. */
769 answer = NULL;
770 ret = -EPERM;
771 last_perm = &inetsw6[p->type];
772 list_for_each(lh, &inetsw6[p->type]) {
773 answer = list_entry(lh, struct inet_protosw, list);
774
775 /* Check only the non-wild match. */
776 if (INET_PROTOSW_PERMANENT & answer->flags) {
777 if (protocol == answer->protocol)
778 break;
779 last_perm = lh;
780 }
781
782 answer = NULL;
783 }
784 if (answer)
785 goto out_permanent;
786
787 /* Add the new entry after the last permanent entry if any, so that
788 * the new entry does not override a permanent entry when matched with
789 * a wild-card protocol. But it is allowed to override any existing
790 * non-permanent entry. This means that when we remove this entry, the
791 * system automatically returns to the old behavior.
792 */
793 list_add_rcu(&p->list, last_perm);
794 ret = 0;
795 out:
796 spin_unlock_bh(&inetsw6_lock);
797 return ret;
798
799 out_permanent:
800 pr_err("Attempt to override permanent protocol %d\n", protocol);
801 goto out;
802
803 out_illegal:
804 pr_err("Ignoring attempt to register invalid socket type %d\n",
805 p->type);
806 goto out;
807 }
808 EXPORT_SYMBOL(inet6_register_protosw);
809
810 void
inet6_unregister_protosw(struct inet_protosw *p)811 inet6_unregister_protosw(struct inet_protosw *p)
812 {
813 if (INET_PROTOSW_PERMANENT & p->flags) {
814 pr_err("Attempt to unregister permanent protocol %d\n",
815 p->protocol);
816 } else {
817 spin_lock_bh(&inetsw6_lock);
818 list_del_rcu(&p->list);
819 spin_unlock_bh(&inetsw6_lock);
820
821 synchronize_net();
822 }
823 }
824 EXPORT_SYMBOL(inet6_unregister_protosw);
825
inet6_sk_rebuild_header(struct sock *sk)826 int inet6_sk_rebuild_header(struct sock *sk)
827 {
828 struct ipv6_pinfo *np = inet6_sk(sk);
829 struct dst_entry *dst;
830
831 dst = __sk_dst_check(sk, np->dst_cookie);
832
833 if (!dst) {
834 struct inet_sock *inet = inet_sk(sk);
835 struct in6_addr *final_p, final;
836 struct flowi6 fl6;
837
838 memset(&fl6, 0, sizeof(fl6));
839 fl6.flowi6_proto = sk->sk_protocol;
840 fl6.daddr = sk->sk_v6_daddr;
841 fl6.saddr = np->saddr;
842 fl6.flowlabel = np->flow_label;
843 fl6.flowi6_oif = sk->sk_bound_dev_if;
844 fl6.flowi6_mark = sk->sk_mark;
845 fl6.fl6_dport = inet->inet_dport;
846 fl6.fl6_sport = inet->inet_sport;
847 fl6.flowi6_uid = sk->sk_uid;
848 security_sk_classify_flow(sk, flowi6_to_flowi_common(&fl6));
849
850 rcu_read_lock();
851 final_p = fl6_update_dst(&fl6, rcu_dereference(np->opt),
852 &final);
853 rcu_read_unlock();
854
855 dst = ip6_dst_lookup_flow(sock_net(sk), sk, &fl6, final_p);
856 if (IS_ERR(dst)) {
857 sk->sk_route_caps = 0;
858 sk->sk_err_soft = -PTR_ERR(dst);
859 return PTR_ERR(dst);
860 }
861
862 ip6_dst_store(sk, dst, NULL, NULL);
863 }
864
865 return 0;
866 }
867 EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header);
868
ipv6_opt_accepted(const struct sock *sk, const struct sk_buff *skb, const struct inet6_skb_parm *opt)869 bool ipv6_opt_accepted(const struct sock *sk, const struct sk_buff *skb,
870 const struct inet6_skb_parm *opt)
871 {
872 const struct ipv6_pinfo *np = inet6_sk(sk);
873
874 if (np->rxopt.all) {
875 if (((opt->flags & IP6SKB_HOPBYHOP) &&
876 (np->rxopt.bits.hopopts || np->rxopt.bits.ohopopts)) ||
877 (ip6_flowinfo((struct ipv6hdr *) skb_network_header(skb)) &&
878 np->rxopt.bits.rxflow) ||
879 (opt->srcrt && (np->rxopt.bits.srcrt ||
880 np->rxopt.bits.osrcrt)) ||
881 ((opt->dst1 || opt->dst0) &&
882 (np->rxopt.bits.dstopts || np->rxopt.bits.odstopts)))
883 return true;
884 }
885 return false;
886 }
887 EXPORT_SYMBOL_GPL(ipv6_opt_accepted);
888
889 static struct packet_type ipv6_packet_type __read_mostly = {
890 .type = cpu_to_be16(ETH_P_IPV6),
891 .func = ipv6_rcv,
892 .list_func = ipv6_list_rcv,
893 };
894
ipv6_packet_init(void)895 static int __init ipv6_packet_init(void)
896 {
897 dev_add_pack(&ipv6_packet_type);
898 return 0;
899 }
900
ipv6_packet_cleanup(void)901 static void ipv6_packet_cleanup(void)
902 {
903 dev_remove_pack(&ipv6_packet_type);
904 }
905
ipv6_init_mibs(struct net *net)906 static int __net_init ipv6_init_mibs(struct net *net)
907 {
908 int i;
909
910 net->mib.udp_stats_in6 = alloc_percpu(struct udp_mib);
911 if (!net->mib.udp_stats_in6)
912 return -ENOMEM;
913 net->mib.udplite_stats_in6 = alloc_percpu(struct udp_mib);
914 if (!net->mib.udplite_stats_in6)
915 goto err_udplite_mib;
916 net->mib.ipv6_statistics = alloc_percpu(struct ipstats_mib);
917 if (!net->mib.ipv6_statistics)
918 goto err_ip_mib;
919
920 for_each_possible_cpu(i) {
921 struct ipstats_mib *af_inet6_stats;
922 af_inet6_stats = per_cpu_ptr(net->mib.ipv6_statistics, i);
923 u64_stats_init(&af_inet6_stats->syncp);
924 }
925
926
927 net->mib.icmpv6_statistics = alloc_percpu(struct icmpv6_mib);
928 if (!net->mib.icmpv6_statistics)
929 goto err_icmp_mib;
930 net->mib.icmpv6msg_statistics = kzalloc(sizeof(struct icmpv6msg_mib),
931 GFP_KERNEL);
932 if (!net->mib.icmpv6msg_statistics)
933 goto err_icmpmsg_mib;
934 return 0;
935
936 err_icmpmsg_mib:
937 free_percpu(net->mib.icmpv6_statistics);
938 err_icmp_mib:
939 free_percpu(net->mib.ipv6_statistics);
940 err_ip_mib:
941 free_percpu(net->mib.udplite_stats_in6);
942 err_udplite_mib:
943 free_percpu(net->mib.udp_stats_in6);
944 return -ENOMEM;
945 }
946
ipv6_cleanup_mibs(struct net *net)947 static void ipv6_cleanup_mibs(struct net *net)
948 {
949 free_percpu(net->mib.udp_stats_in6);
950 free_percpu(net->mib.udplite_stats_in6);
951 free_percpu(net->mib.ipv6_statistics);
952 free_percpu(net->mib.icmpv6_statistics);
953 kfree(net->mib.icmpv6msg_statistics);
954 }
955
inet6_net_init(struct net *net)956 static int __net_init inet6_net_init(struct net *net)
957 {
958 int err = 0;
959
960 net->ipv6.sysctl.bindv6only = 0;
961 net->ipv6.sysctl.icmpv6_time = 1*HZ;
962 net->ipv6.sysctl.icmpv6_echo_ignore_all = 0;
963 net->ipv6.sysctl.icmpv6_echo_ignore_multicast = 0;
964 net->ipv6.sysctl.icmpv6_echo_ignore_anycast = 0;
965
966 /* By default, rate limit error messages.
967 * Except for pmtu discovery, it would break it.
968 * proc_do_large_bitmap needs pointer to the bitmap.
969 */
970 bitmap_set(net->ipv6.sysctl.icmpv6_ratemask, 0, ICMPV6_ERRMSG_MAX + 1);
971 bitmap_clear(net->ipv6.sysctl.icmpv6_ratemask, ICMPV6_PKT_TOOBIG, 1);
972 net->ipv6.sysctl.icmpv6_ratemask_ptr = net->ipv6.sysctl.icmpv6_ratemask;
973
974 net->ipv6.sysctl.flowlabel_consistency = 1;
975 net->ipv6.sysctl.auto_flowlabels = IP6_DEFAULT_AUTO_FLOW_LABELS;
976 net->ipv6.sysctl.idgen_retries = 3;
977 net->ipv6.sysctl.idgen_delay = 1 * HZ;
978 net->ipv6.sysctl.flowlabel_state_ranges = 0;
979 net->ipv6.sysctl.max_dst_opts_cnt = IP6_DEFAULT_MAX_DST_OPTS_CNT;
980 net->ipv6.sysctl.max_hbh_opts_cnt = IP6_DEFAULT_MAX_HBH_OPTS_CNT;
981 net->ipv6.sysctl.max_dst_opts_len = IP6_DEFAULT_MAX_DST_OPTS_LEN;
982 net->ipv6.sysctl.max_hbh_opts_len = IP6_DEFAULT_MAX_HBH_OPTS_LEN;
983 atomic_set(&net->ipv6.fib6_sernum, 1);
984
985 err = ipv6_init_mibs(net);
986 if (err)
987 return err;
988 #ifdef CONFIG_PROC_FS
989 err = udp6_proc_init(net);
990 if (err)
991 goto out;
992 err = tcp6_proc_init(net);
993 if (err)
994 goto proc_tcp6_fail;
995 err = ac6_proc_init(net);
996 if (err)
997 goto proc_ac6_fail;
998 #endif
999 return err;
1000
1001 #ifdef CONFIG_PROC_FS
1002 proc_ac6_fail:
1003 tcp6_proc_exit(net);
1004 proc_tcp6_fail:
1005 udp6_proc_exit(net);
1006 out:
1007 ipv6_cleanup_mibs(net);
1008 return err;
1009 #endif
1010 }
1011
inet6_net_exit(struct net *net)1012 static void __net_exit inet6_net_exit(struct net *net)
1013 {
1014 #ifdef CONFIG_PROC_FS
1015 udp6_proc_exit(net);
1016 tcp6_proc_exit(net);
1017 ac6_proc_exit(net);
1018 #endif
1019 ipv6_cleanup_mibs(net);
1020 }
1021
1022 static struct pernet_operations inet6_net_ops = {
1023 .init = inet6_net_init,
1024 .exit = inet6_net_exit,
1025 };
1026
ipv6_route_input(struct sk_buff *skb)1027 static int ipv6_route_input(struct sk_buff *skb)
1028 {
1029 ip6_route_input(skb);
1030 return skb_dst(skb)->error;
1031 }
1032
1033 static const struct ipv6_stub ipv6_stub_impl = {
1034 .ipv6_sock_mc_join = ipv6_sock_mc_join,
1035 .ipv6_sock_mc_drop = ipv6_sock_mc_drop,
1036 .ipv6_dst_lookup_flow = ip6_dst_lookup_flow,
1037 .ipv6_route_input = ipv6_route_input,
1038 .fib6_get_table = fib6_get_table,
1039 .fib6_table_lookup = fib6_table_lookup,
1040 .fib6_lookup = fib6_lookup,
1041 .fib6_select_path = fib6_select_path,
1042 .ip6_mtu_from_fib6 = ip6_mtu_from_fib6,
1043 .fib6_nh_init = fib6_nh_init,
1044 .fib6_nh_release = fib6_nh_release,
1045 .fib6_nh_release_dsts = fib6_nh_release_dsts,
1046 .fib6_update_sernum = fib6_update_sernum_stub,
1047 .fib6_rt_update = fib6_rt_update,
1048 .ip6_del_rt = ip6_del_rt,
1049 .udpv6_encap_enable = udpv6_encap_enable,
1050 .ndisc_send_na = ndisc_send_na,
1051 #if IS_ENABLED(CONFIG_XFRM)
1052 .xfrm6_local_rxpmtu = xfrm6_local_rxpmtu,
1053 .xfrm6_udp_encap_rcv = xfrm6_udp_encap_rcv,
1054 .xfrm6_rcv_encap = xfrm6_rcv_encap,
1055 #endif
1056 .nd_tbl = &nd_tbl,
1057 .ipv6_fragment = ip6_fragment,
1058 };
1059
1060 static const struct ipv6_bpf_stub ipv6_bpf_stub_impl = {
1061 .inet6_bind = __inet6_bind,
1062 .udp6_lib_lookup = __udp6_lib_lookup,
1063 };
1064
inet6_init(void)1065 static int __init inet6_init(void)
1066 {
1067 struct list_head *r;
1068 int err = 0;
1069
1070 sock_skb_cb_check_size(sizeof(struct inet6_skb_parm));
1071
1072 /* Register the socket-side information for inet6_create. */
1073 for (r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r)
1074 INIT_LIST_HEAD(r);
1075
1076 if (disable_ipv6_mod) {
1077 pr_info("Loaded, but administratively disabled, reboot required to enable\n");
1078 goto out;
1079 }
1080
1081 err = proto_register(&tcpv6_prot, 1);
1082 if (err)
1083 goto out;
1084
1085 err = proto_register(&udpv6_prot, 1);
1086 if (err)
1087 goto out_unregister_tcp_proto;
1088
1089 err = proto_register(&udplitev6_prot, 1);
1090 if (err)
1091 goto out_unregister_udp_proto;
1092
1093 err = proto_register(&rawv6_prot, 1);
1094 if (err)
1095 goto out_unregister_udplite_proto;
1096
1097 err = proto_register(&pingv6_prot, 1);
1098 if (err)
1099 goto out_unregister_raw_proto;
1100
1101 /* We MUST register RAW sockets before we create the ICMP6,
1102 * IGMP6, or NDISC control sockets.
1103 */
1104 err = rawv6_init();
1105 if (err)
1106 goto out_unregister_ping_proto;
1107
1108 /* Register the family here so that the init calls below will
1109 * be able to create sockets. (?? is this dangerous ??)
1110 */
1111 err = sock_register(&inet6_family_ops);
1112 if (err)
1113 goto out_sock_register_fail;
1114
1115 /*
1116 * ipngwg API draft makes clear that the correct semantics
1117 * for TCP and UDP is to consider one TCP and UDP instance
1118 * in a host available by both INET and INET6 APIs and
1119 * able to communicate via both network protocols.
1120 */
1121
1122 err = register_pernet_subsys(&inet6_net_ops);
1123 if (err)
1124 goto register_pernet_fail;
1125 err = ip6_mr_init();
1126 if (err)
1127 goto ipmr_fail;
1128 err = icmpv6_init();
1129 if (err)
1130 goto icmp_fail;
1131 err = ndisc_init();
1132 if (err)
1133 goto ndisc_fail;
1134 err = igmp6_init();
1135 if (err)
1136 goto igmp_fail;
1137
1138 err = ipv6_netfilter_init();
1139 if (err)
1140 goto netfilter_fail;
1141 /* Create /proc/foo6 entries. */
1142 #ifdef CONFIG_PROC_FS
1143 err = -ENOMEM;
1144 if (raw6_proc_init())
1145 goto proc_raw6_fail;
1146 if (udplite6_proc_init())
1147 goto proc_udplite6_fail;
1148 if (ipv6_misc_proc_init())
1149 goto proc_misc6_fail;
1150 if (if6_proc_init())
1151 goto proc_if6_fail;
1152 #endif
1153 err = ip6_route_init();
1154 if (err)
1155 goto ip6_route_fail;
1156 err = ndisc_late_init();
1157 if (err)
1158 goto ndisc_late_fail;
1159 err = ip6_flowlabel_init();
1160 if (err)
1161 goto ip6_flowlabel_fail;
1162 err = ipv6_anycast_init();
1163 if (err)
1164 goto ipv6_anycast_fail;
1165 err = addrconf_init();
1166 if (err)
1167 goto addrconf_fail;
1168
1169 /* Init v6 extension headers. */
1170 err = ipv6_exthdrs_init();
1171 if (err)
1172 goto ipv6_exthdrs_fail;
1173
1174 err = ipv6_frag_init();
1175 if (err)
1176 goto ipv6_frag_fail;
1177
1178 /* Init v6 transport protocols. */
1179 err = udpv6_init();
1180 if (err)
1181 goto udpv6_fail;
1182
1183 err = udplitev6_init();
1184 if (err)
1185 goto udplitev6_fail;
1186
1187 err = udpv6_offload_init();
1188 if (err)
1189 goto udpv6_offload_fail;
1190
1191 err = tcpv6_init();
1192 if (err)
1193 goto tcpv6_fail;
1194
1195 err = ipv6_packet_init();
1196 if (err)
1197 goto ipv6_packet_fail;
1198
1199 err = pingv6_init();
1200 if (err)
1201 goto pingv6_fail;
1202
1203 err = calipso_init();
1204 if (err)
1205 goto calipso_fail;
1206
1207 err = seg6_init();
1208 if (err)
1209 goto seg6_fail;
1210
1211 err = rpl_init();
1212 if (err)
1213 goto rpl_fail;
1214
1215 err = igmp6_late_init();
1216 if (err)
1217 goto igmp6_late_err;
1218
1219 #ifdef CONFIG_SYSCTL
1220 err = ipv6_sysctl_register();
1221 if (err)
1222 goto sysctl_fail;
1223 #endif
1224
1225 /* ensure that ipv6 stubs are visible only after ipv6 is ready */
1226 wmb();
1227 ipv6_stub = &ipv6_stub_impl;
1228 ipv6_bpf_stub = &ipv6_bpf_stub_impl;
1229 out:
1230 return err;
1231
1232 #ifdef CONFIG_SYSCTL
1233 sysctl_fail:
1234 igmp6_late_cleanup();
1235 #endif
1236 igmp6_late_err:
1237 rpl_exit();
1238 rpl_fail:
1239 seg6_exit();
1240 seg6_fail:
1241 calipso_exit();
1242 calipso_fail:
1243 pingv6_exit();
1244 pingv6_fail:
1245 ipv6_packet_cleanup();
1246 ipv6_packet_fail:
1247 tcpv6_exit();
1248 tcpv6_fail:
1249 udpv6_offload_exit();
1250 udpv6_offload_fail:
1251 udplitev6_exit();
1252 udplitev6_fail:
1253 udpv6_exit();
1254 udpv6_fail:
1255 ipv6_frag_exit();
1256 ipv6_frag_fail:
1257 ipv6_exthdrs_exit();
1258 ipv6_exthdrs_fail:
1259 addrconf_cleanup();
1260 addrconf_fail:
1261 ipv6_anycast_cleanup();
1262 ipv6_anycast_fail:
1263 ip6_flowlabel_cleanup();
1264 ip6_flowlabel_fail:
1265 ndisc_late_cleanup();
1266 ndisc_late_fail:
1267 ip6_route_cleanup();
1268 ip6_route_fail:
1269 #ifdef CONFIG_PROC_FS
1270 if6_proc_exit();
1271 proc_if6_fail:
1272 ipv6_misc_proc_exit();
1273 proc_misc6_fail:
1274 udplite6_proc_exit();
1275 proc_udplite6_fail:
1276 raw6_proc_exit();
1277 proc_raw6_fail:
1278 #endif
1279 ipv6_netfilter_fini();
1280 netfilter_fail:
1281 igmp6_cleanup();
1282 igmp_fail:
1283 ndisc_cleanup();
1284 ndisc_fail:
1285 icmpv6_cleanup();
1286 icmp_fail:
1287 ip6_mr_cleanup();
1288 ipmr_fail:
1289 unregister_pernet_subsys(&inet6_net_ops);
1290 register_pernet_fail:
1291 sock_unregister(PF_INET6);
1292 rtnl_unregister_all(PF_INET6);
1293 out_sock_register_fail:
1294 rawv6_exit();
1295 out_unregister_ping_proto:
1296 proto_unregister(&pingv6_prot);
1297 out_unregister_raw_proto:
1298 proto_unregister(&rawv6_prot);
1299 out_unregister_udplite_proto:
1300 proto_unregister(&udplitev6_prot);
1301 out_unregister_udp_proto:
1302 proto_unregister(&udpv6_prot);
1303 out_unregister_tcp_proto:
1304 proto_unregister(&tcpv6_prot);
1305 goto out;
1306 }
1307 module_init(inet6_init);
1308
1309 MODULE_ALIAS_NETPROTO(PF_INET6);
1310