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 goto out_sk_release;
262 }
263 if (sk->sk_prot->init) {
264 err = sk->sk_prot->init(sk);
265 if (err)
266 goto out_sk_release;
267 }
268
269 if (!kern) {
270 err = BPF_CGROUP_RUN_PROG_INET_SOCK(sk);
271 if (err)
272 goto out_sk_release;
273 }
274 out:
275 return err;
276 out_rcu_unlock:
277 rcu_read_unlock();
278 goto out;
279 out_sk_release:
280 sk_common_release(sk);
281 sock->sk = NULL;
282 goto out;
283 }
284
__inet6_bind(struct sock * sk,struct sockaddr * uaddr,int addr_len,u32 flags)285 static int __inet6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len,
286 u32 flags)
287 {
288 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)uaddr;
289 struct inet_sock *inet = inet_sk(sk);
290 struct ipv6_pinfo *np = inet6_sk(sk);
291 struct net *net = sock_net(sk);
292 __be32 v4addr = 0;
293 unsigned short snum;
294 bool saved_ipv6only;
295 int addr_type = 0;
296 int err = 0;
297
298 if (addr->sin6_family != AF_INET6)
299 return -EAFNOSUPPORT;
300
301 addr_type = ipv6_addr_type(&addr->sin6_addr);
302 if ((addr_type & IPV6_ADDR_MULTICAST) && sk->sk_type == SOCK_STREAM)
303 return -EINVAL;
304
305 snum = ntohs(addr->sin6_port);
306 if (snum && inet_port_requires_bind_service(net, snum) &&
307 !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE))
308 return -EACCES;
309
310 if (flags & BIND_WITH_LOCK)
311 lock_sock(sk);
312
313 /* Check these errors (active socket, double bind). */
314 if (sk->sk_state != TCP_CLOSE || inet->inet_num) {
315 err = -EINVAL;
316 goto out;
317 }
318
319 /* Check if the address belongs to the host. */
320 if (addr_type == IPV6_ADDR_MAPPED) {
321 struct net_device *dev = NULL;
322 int chk_addr_ret;
323
324 /* Binding to v4-mapped address on a v6-only socket
325 * makes no sense
326 */
327 if (sk->sk_ipv6only) {
328 err = -EINVAL;
329 goto out;
330 }
331
332 rcu_read_lock();
333 if (sk->sk_bound_dev_if) {
334 dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if);
335 if (!dev) {
336 err = -ENODEV;
337 goto out_unlock;
338 }
339 }
340
341 /* Reproduce AF_INET checks to make the bindings consistent */
342 v4addr = addr->sin6_addr.s6_addr32[3];
343 chk_addr_ret = inet_addr_type_dev_table(net, dev, v4addr);
344 rcu_read_unlock();
345
346 if (!inet_can_nonlocal_bind(net, inet) &&
347 v4addr != htonl(INADDR_ANY) &&
348 chk_addr_ret != RTN_LOCAL &&
349 chk_addr_ret != RTN_MULTICAST &&
350 chk_addr_ret != RTN_BROADCAST) {
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->bind_address_no_port ||
413 (flags & BIND_FORCE_ADDRESS_NO_PORT))) {
414 if (sk->sk_prot->get_port(sk, snum)) {
415 sk->sk_ipv6only = saved_ipv6only;
416 inet_reset_saddr(sk);
417 err = -EADDRINUSE;
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 goto out;
426 }
427 }
428 }
429
430 if (addr_type != IPV6_ADDR_ANY)
431 sk->sk_userlocks |= SOCK_BINDADDR_LOCK;
432 if (snum)
433 sk->sk_userlocks |= SOCK_BINDPORT_LOCK;
434 inet->inet_sport = htons(inet->inet_num);
435 inet->inet_dport = 0;
436 inet->inet_daddr = 0;
437 out:
438 if (flags & BIND_WITH_LOCK)
439 release_sock(sk);
440 return err;
441 out_unlock:
442 rcu_read_unlock();
443 goto out;
444 }
445
446 /* bind for INET6 API */
inet6_bind(struct socket * sock,struct sockaddr * uaddr,int addr_len)447 int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
448 {
449 struct sock *sk = sock->sk;
450 const struct proto *prot;
451 int err = 0;
452
453 /* If the socket has its own bind function then use it. */
454 prot = READ_ONCE(sk->sk_prot);
455 if (prot->bind)
456 return prot->bind(sk, uaddr, addr_len);
457
458 if (addr_len < SIN6_LEN_RFC2133)
459 return -EINVAL;
460
461 /* BPF prog is run before any checks are done so that if the prog
462 * changes context in a wrong way it will be caught.
463 */
464 err = BPF_CGROUP_RUN_PROG_INET6_BIND(sk, uaddr);
465 if (err)
466 return err;
467
468 return __inet6_bind(sk, uaddr, addr_len, BIND_WITH_LOCK);
469 }
470 EXPORT_SYMBOL(inet6_bind);
471
inet6_release(struct socket * sock)472 int inet6_release(struct socket *sock)
473 {
474 struct sock *sk = sock->sk;
475
476 if (!sk)
477 return -EINVAL;
478
479 /* Free mc lists */
480 ipv6_sock_mc_close(sk);
481
482 /* Free ac lists */
483 ipv6_sock_ac_close(sk);
484
485 return inet_release(sock);
486 }
487 EXPORT_SYMBOL(inet6_release);
488
inet6_destroy_sock(struct sock * sk)489 void inet6_destroy_sock(struct sock *sk)
490 {
491 struct ipv6_pinfo *np = inet6_sk(sk);
492 struct sk_buff *skb;
493 struct ipv6_txoptions *opt;
494
495 /* Release rx options */
496
497 skb = xchg(&np->pktoptions, NULL);
498 kfree_skb(skb);
499
500 skb = xchg(&np->rxpmtu, NULL);
501 kfree_skb(skb);
502
503 /* Free flowlabels */
504 fl6_free_socklist(sk);
505
506 /* Free tx options */
507
508 opt = xchg((__force struct ipv6_txoptions **)&np->opt, NULL);
509 if (opt) {
510 atomic_sub(opt->tot_len, &sk->sk_omem_alloc);
511 txopt_put(opt);
512 }
513 }
514 EXPORT_SYMBOL_GPL(inet6_destroy_sock);
515
inet6_cleanup_sock(struct sock * sk)516 void inet6_cleanup_sock(struct sock *sk)
517 {
518 inet6_destroy_sock(sk);
519 }
520 EXPORT_SYMBOL_GPL(inet6_cleanup_sock);
521
522 /*
523 * This does both peername and sockname.
524 */
inet6_getname(struct socket * sock,struct sockaddr * uaddr,int peer)525 int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
526 int peer)
527 {
528 struct sockaddr_in6 *sin = (struct sockaddr_in6 *)uaddr;
529 struct sock *sk = sock->sk;
530 struct inet_sock *inet = inet_sk(sk);
531 struct ipv6_pinfo *np = inet6_sk(sk);
532
533 sin->sin6_family = AF_INET6;
534 sin->sin6_flowinfo = 0;
535 sin->sin6_scope_id = 0;
536 if (peer) {
537 if (!inet->inet_dport)
538 return -ENOTCONN;
539 if (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) &&
540 peer == 1)
541 return -ENOTCONN;
542 sin->sin6_port = inet->inet_dport;
543 sin->sin6_addr = sk->sk_v6_daddr;
544 if (np->sndflow)
545 sin->sin6_flowinfo = np->flow_label;
546 } else {
547 if (ipv6_addr_any(&sk->sk_v6_rcv_saddr))
548 sin->sin6_addr = np->saddr;
549 else
550 sin->sin6_addr = sk->sk_v6_rcv_saddr;
551 sin->sin6_port = inet->inet_sport;
552 }
553 if (cgroup_bpf_enabled)
554 BPF_CGROUP_RUN_SA_PROG_LOCK(sk, (struct sockaddr *)sin,
555 peer ? BPF_CGROUP_INET6_GETPEERNAME :
556 BPF_CGROUP_INET6_GETSOCKNAME,
557 NULL);
558 sin->sin6_scope_id = ipv6_iface_scope_id(&sin->sin6_addr,
559 sk->sk_bound_dev_if);
560 return sizeof(*sin);
561 }
562 EXPORT_SYMBOL(inet6_getname);
563
inet6_ioctl(struct socket * sock,unsigned int cmd,unsigned long arg)564 int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
565 {
566 void __user *argp = (void __user *)arg;
567 struct sock *sk = sock->sk;
568 struct net *net = sock_net(sk);
569 const struct proto *prot;
570
571 switch (cmd) {
572 case SIOCADDRT:
573 case SIOCDELRT: {
574 struct in6_rtmsg rtmsg;
575
576 if (copy_from_user(&rtmsg, argp, sizeof(rtmsg)))
577 return -EFAULT;
578 return ipv6_route_ioctl(net, cmd, &rtmsg);
579 }
580 case SIOCSIFADDR:
581 return addrconf_add_ifaddr(net, argp);
582 case SIOCDIFADDR:
583 return addrconf_del_ifaddr(net, argp);
584 case SIOCSIFDSTADDR:
585 return addrconf_set_dstaddr(net, argp);
586 default:
587 /* IPV6_ADDRFORM can change sk->sk_prot under us. */
588 prot = READ_ONCE(sk->sk_prot);
589 if (!prot->ioctl)
590 return -ENOIOCTLCMD;
591 return prot->ioctl(sk, cmd, arg);
592 }
593 /*NOTREACHED*/
594 return 0;
595 }
596 EXPORT_SYMBOL(inet6_ioctl);
597
598 #ifdef CONFIG_COMPAT
599 struct compat_in6_rtmsg {
600 struct in6_addr rtmsg_dst;
601 struct in6_addr rtmsg_src;
602 struct in6_addr rtmsg_gateway;
603 u32 rtmsg_type;
604 u16 rtmsg_dst_len;
605 u16 rtmsg_src_len;
606 u32 rtmsg_metric;
607 u32 rtmsg_info;
608 u32 rtmsg_flags;
609 s32 rtmsg_ifindex;
610 };
611
inet6_compat_routing_ioctl(struct sock * sk,unsigned int cmd,struct compat_in6_rtmsg __user * ur)612 static int inet6_compat_routing_ioctl(struct sock *sk, unsigned int cmd,
613 struct compat_in6_rtmsg __user *ur)
614 {
615 struct in6_rtmsg rt;
616
617 if (copy_from_user(&rt.rtmsg_dst, &ur->rtmsg_dst,
618 3 * sizeof(struct in6_addr)) ||
619 get_user(rt.rtmsg_type, &ur->rtmsg_type) ||
620 get_user(rt.rtmsg_dst_len, &ur->rtmsg_dst_len) ||
621 get_user(rt.rtmsg_src_len, &ur->rtmsg_src_len) ||
622 get_user(rt.rtmsg_metric, &ur->rtmsg_metric) ||
623 get_user(rt.rtmsg_info, &ur->rtmsg_info) ||
624 get_user(rt.rtmsg_flags, &ur->rtmsg_flags) ||
625 get_user(rt.rtmsg_ifindex, &ur->rtmsg_ifindex))
626 return -EFAULT;
627
628
629 return ipv6_route_ioctl(sock_net(sk), cmd, &rt);
630 }
631
inet6_compat_ioctl(struct socket * sock,unsigned int cmd,unsigned long arg)632 int inet6_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
633 {
634 void __user *argp = compat_ptr(arg);
635 struct sock *sk = sock->sk;
636
637 switch (cmd) {
638 case SIOCADDRT:
639 case SIOCDELRT:
640 return inet6_compat_routing_ioctl(sk, cmd, argp);
641 default:
642 return -ENOIOCTLCMD;
643 }
644 }
645 EXPORT_SYMBOL_GPL(inet6_compat_ioctl);
646 #endif /* CONFIG_COMPAT */
647
648 INDIRECT_CALLABLE_DECLARE(int udpv6_sendmsg(struct sock *, struct msghdr *,
649 size_t));
inet6_sendmsg(struct socket * sock,struct msghdr * msg,size_t size)650 int inet6_sendmsg(struct socket *sock, struct msghdr *msg, size_t size)
651 {
652 struct sock *sk = sock->sk;
653 const struct proto *prot;
654
655 if (unlikely(inet_send_prepare(sk)))
656 return -EAGAIN;
657
658 /* IPV6_ADDRFORM can change sk->sk_prot under us. */
659 prot = READ_ONCE(sk->sk_prot);
660 return INDIRECT_CALL_2(prot->sendmsg, tcp_sendmsg, udpv6_sendmsg,
661 sk, msg, size);
662 }
663
664 INDIRECT_CALLABLE_DECLARE(int udpv6_recvmsg(struct sock *, struct msghdr *,
665 size_t, int, int, int *));
inet6_recvmsg(struct socket * sock,struct msghdr * msg,size_t size,int flags)666 int inet6_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
667 int flags)
668 {
669 struct sock *sk = sock->sk;
670 const struct proto *prot;
671 int addr_len = 0;
672 int err;
673
674 if (likely(!(flags & MSG_ERRQUEUE)))
675 sock_rps_record_flow(sk);
676
677 /* IPV6_ADDRFORM can change sk->sk_prot under us. */
678 prot = READ_ONCE(sk->sk_prot);
679 err = INDIRECT_CALL_2(prot->recvmsg, tcp_recvmsg, udpv6_recvmsg,
680 sk, msg, size, flags & MSG_DONTWAIT,
681 flags & ~MSG_DONTWAIT, &addr_len);
682 if (err >= 0)
683 msg->msg_namelen = addr_len;
684 return err;
685 }
686
687 const struct proto_ops inet6_stream_ops = {
688 .family = PF_INET6,
689 .owner = THIS_MODULE,
690 .release = inet6_release,
691 .bind = inet6_bind,
692 .connect = inet_stream_connect, /* ok */
693 .socketpair = sock_no_socketpair, /* a do nothing */
694 .accept = inet_accept, /* ok */
695 .getname = inet6_getname,
696 .poll = tcp_poll, /* ok */
697 .ioctl = inet6_ioctl, /* must change */
698 .gettstamp = sock_gettstamp,
699 .listen = inet_listen, /* ok */
700 .shutdown = inet_shutdown, /* ok */
701 .setsockopt = sock_common_setsockopt, /* ok */
702 .getsockopt = sock_common_getsockopt, /* ok */
703 .sendmsg = inet6_sendmsg, /* retpoline's sake */
704 .recvmsg = inet6_recvmsg, /* retpoline's sake */
705 #ifdef CONFIG_MMU
706 .mmap = tcp_mmap,
707 #endif
708 .sendpage = inet_sendpage,
709 .sendmsg_locked = tcp_sendmsg_locked,
710 .sendpage_locked = tcp_sendpage_locked,
711 .splice_read = tcp_splice_read,
712 .read_sock = tcp_read_sock,
713 .peek_len = tcp_peek_len,
714 #ifdef CONFIG_COMPAT
715 .compat_ioctl = inet6_compat_ioctl,
716 #endif
717 .set_rcvlowat = tcp_set_rcvlowat,
718 };
719
720 const struct proto_ops inet6_dgram_ops = {
721 .family = PF_INET6,
722 .owner = THIS_MODULE,
723 .release = inet6_release,
724 .bind = inet6_bind,
725 .connect = inet_dgram_connect, /* ok */
726 .socketpair = sock_no_socketpair, /* a do nothing */
727 .accept = sock_no_accept, /* a do nothing */
728 .getname = inet6_getname,
729 .poll = udp_poll, /* ok */
730 .ioctl = inet6_ioctl, /* must change */
731 .gettstamp = sock_gettstamp,
732 .listen = sock_no_listen, /* ok */
733 .shutdown = inet_shutdown, /* ok */
734 .setsockopt = sock_common_setsockopt, /* ok */
735 .getsockopt = sock_common_getsockopt, /* ok */
736 .sendmsg = inet6_sendmsg, /* retpoline's sake */
737 .recvmsg = inet6_recvmsg, /* retpoline's sake */
738 .mmap = sock_no_mmap,
739 .sendpage = sock_no_sendpage,
740 .set_peek_off = sk_set_peek_off,
741 #ifdef CONFIG_COMPAT
742 .compat_ioctl = inet6_compat_ioctl,
743 #endif
744 };
745
746 static const struct net_proto_family inet6_family_ops = {
747 .family = PF_INET6,
748 .create = inet6_create,
749 .owner = THIS_MODULE,
750 };
751
inet6_register_protosw(struct inet_protosw * p)752 int inet6_register_protosw(struct inet_protosw *p)
753 {
754 struct list_head *lh;
755 struct inet_protosw *answer;
756 struct list_head *last_perm;
757 int protocol = p->protocol;
758 int ret;
759
760 spin_lock_bh(&inetsw6_lock);
761
762 ret = -EINVAL;
763 if (p->type >= SOCK_MAX)
764 goto out_illegal;
765
766 /* If we are trying to override a permanent protocol, bail. */
767 answer = NULL;
768 ret = -EPERM;
769 last_perm = &inetsw6[p->type];
770 list_for_each(lh, &inetsw6[p->type]) {
771 answer = list_entry(lh, struct inet_protosw, list);
772
773 /* Check only the non-wild match. */
774 if (INET_PROTOSW_PERMANENT & answer->flags) {
775 if (protocol == answer->protocol)
776 break;
777 last_perm = lh;
778 }
779
780 answer = NULL;
781 }
782 if (answer)
783 goto out_permanent;
784
785 /* Add the new entry after the last permanent entry if any, so that
786 * the new entry does not override a permanent entry when matched with
787 * a wild-card protocol. But it is allowed to override any existing
788 * non-permanent entry. This means that when we remove this entry, the
789 * system automatically returns to the old behavior.
790 */
791 list_add_rcu(&p->list, last_perm);
792 ret = 0;
793 out:
794 spin_unlock_bh(&inetsw6_lock);
795 return ret;
796
797 out_permanent:
798 pr_err("Attempt to override permanent protocol %d\n", protocol);
799 goto out;
800
801 out_illegal:
802 pr_err("Ignoring attempt to register invalid socket type %d\n",
803 p->type);
804 goto out;
805 }
806 EXPORT_SYMBOL(inet6_register_protosw);
807
808 void
inet6_unregister_protosw(struct inet_protosw * p)809 inet6_unregister_protosw(struct inet_protosw *p)
810 {
811 if (INET_PROTOSW_PERMANENT & p->flags) {
812 pr_err("Attempt to unregister permanent protocol %d\n",
813 p->protocol);
814 } else {
815 spin_lock_bh(&inetsw6_lock);
816 list_del_rcu(&p->list);
817 spin_unlock_bh(&inetsw6_lock);
818
819 synchronize_net();
820 }
821 }
822 EXPORT_SYMBOL(inet6_unregister_protosw);
823
inet6_sk_rebuild_header(struct sock * sk)824 int inet6_sk_rebuild_header(struct sock *sk)
825 {
826 struct ipv6_pinfo *np = inet6_sk(sk);
827 struct dst_entry *dst;
828
829 dst = __sk_dst_check(sk, np->dst_cookie);
830
831 if (!dst) {
832 struct inet_sock *inet = inet_sk(sk);
833 struct in6_addr *final_p, final;
834 struct flowi6 fl6;
835
836 memset(&fl6, 0, sizeof(fl6));
837 fl6.flowi6_proto = sk->sk_protocol;
838 fl6.daddr = sk->sk_v6_daddr;
839 fl6.saddr = np->saddr;
840 fl6.flowlabel = np->flow_label;
841 fl6.flowi6_oif = sk->sk_bound_dev_if;
842 fl6.flowi6_mark = sk->sk_mark;
843 fl6.fl6_dport = inet->inet_dport;
844 fl6.fl6_sport = inet->inet_sport;
845 fl6.flowi6_uid = sk->sk_uid;
846 security_sk_classify_flow(sk, flowi6_to_flowi_common(&fl6));
847
848 rcu_read_lock();
849 final_p = fl6_update_dst(&fl6, rcu_dereference(np->opt),
850 &final);
851 rcu_read_unlock();
852
853 dst = ip6_dst_lookup_flow(sock_net(sk), sk, &fl6, final_p);
854 if (IS_ERR(dst)) {
855 sk->sk_route_caps = 0;
856 sk->sk_err_soft = -PTR_ERR(dst);
857 return PTR_ERR(dst);
858 }
859
860 ip6_dst_store(sk, dst, NULL, NULL);
861 }
862
863 return 0;
864 }
865 EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header);
866
ipv6_opt_accepted(const struct sock * sk,const struct sk_buff * skb,const struct inet6_skb_parm * opt)867 bool ipv6_opt_accepted(const struct sock *sk, const struct sk_buff *skb,
868 const struct inet6_skb_parm *opt)
869 {
870 const struct ipv6_pinfo *np = inet6_sk(sk);
871
872 if (np->rxopt.all) {
873 if (((opt->flags & IP6SKB_HOPBYHOP) &&
874 (np->rxopt.bits.hopopts || np->rxopt.bits.ohopopts)) ||
875 (ip6_flowinfo((struct ipv6hdr *) skb_network_header(skb)) &&
876 np->rxopt.bits.rxflow) ||
877 (opt->srcrt && (np->rxopt.bits.srcrt ||
878 np->rxopt.bits.osrcrt)) ||
879 ((opt->dst1 || opt->dst0) &&
880 (np->rxopt.bits.dstopts || np->rxopt.bits.odstopts)))
881 return true;
882 }
883 return false;
884 }
885 EXPORT_SYMBOL_GPL(ipv6_opt_accepted);
886
887 static struct packet_type ipv6_packet_type __read_mostly = {
888 .type = cpu_to_be16(ETH_P_IPV6),
889 .func = ipv6_rcv,
890 .list_func = ipv6_list_rcv,
891 };
892
ipv6_packet_init(void)893 static int __init ipv6_packet_init(void)
894 {
895 dev_add_pack(&ipv6_packet_type);
896 return 0;
897 }
898
ipv6_packet_cleanup(void)899 static void ipv6_packet_cleanup(void)
900 {
901 dev_remove_pack(&ipv6_packet_type);
902 }
903
ipv6_init_mibs(struct net * net)904 static int __net_init ipv6_init_mibs(struct net *net)
905 {
906 int i;
907
908 net->mib.udp_stats_in6 = alloc_percpu(struct udp_mib);
909 if (!net->mib.udp_stats_in6)
910 return -ENOMEM;
911 net->mib.udplite_stats_in6 = alloc_percpu(struct udp_mib);
912 if (!net->mib.udplite_stats_in6)
913 goto err_udplite_mib;
914 net->mib.ipv6_statistics = alloc_percpu(struct ipstats_mib);
915 if (!net->mib.ipv6_statistics)
916 goto err_ip_mib;
917
918 for_each_possible_cpu(i) {
919 struct ipstats_mib *af_inet6_stats;
920 af_inet6_stats = per_cpu_ptr(net->mib.ipv6_statistics, i);
921 u64_stats_init(&af_inet6_stats->syncp);
922 }
923
924
925 net->mib.icmpv6_statistics = alloc_percpu(struct icmpv6_mib);
926 if (!net->mib.icmpv6_statistics)
927 goto err_icmp_mib;
928 net->mib.icmpv6msg_statistics = kzalloc(sizeof(struct icmpv6msg_mib),
929 GFP_KERNEL);
930 if (!net->mib.icmpv6msg_statistics)
931 goto err_icmpmsg_mib;
932 return 0;
933
934 err_icmpmsg_mib:
935 free_percpu(net->mib.icmpv6_statistics);
936 err_icmp_mib:
937 free_percpu(net->mib.ipv6_statistics);
938 err_ip_mib:
939 free_percpu(net->mib.udplite_stats_in6);
940 err_udplite_mib:
941 free_percpu(net->mib.udp_stats_in6);
942 return -ENOMEM;
943 }
944
ipv6_cleanup_mibs(struct net * net)945 static void ipv6_cleanup_mibs(struct net *net)
946 {
947 free_percpu(net->mib.udp_stats_in6);
948 free_percpu(net->mib.udplite_stats_in6);
949 free_percpu(net->mib.ipv6_statistics);
950 free_percpu(net->mib.icmpv6_statistics);
951 kfree(net->mib.icmpv6msg_statistics);
952 }
953
inet6_net_init(struct net * net)954 static int __net_init inet6_net_init(struct net *net)
955 {
956 int err = 0;
957
958 net->ipv6.sysctl.bindv6only = 0;
959 net->ipv6.sysctl.icmpv6_time = 1*HZ;
960 net->ipv6.sysctl.icmpv6_echo_ignore_all = 0;
961 net->ipv6.sysctl.icmpv6_echo_ignore_multicast = 0;
962 net->ipv6.sysctl.icmpv6_echo_ignore_anycast = 0;
963
964 /* By default, rate limit error messages.
965 * Except for pmtu discovery, it would break it.
966 * proc_do_large_bitmap needs pointer to the bitmap.
967 */
968 bitmap_set(net->ipv6.sysctl.icmpv6_ratemask, 0, ICMPV6_ERRMSG_MAX + 1);
969 bitmap_clear(net->ipv6.sysctl.icmpv6_ratemask, ICMPV6_PKT_TOOBIG, 1);
970 net->ipv6.sysctl.icmpv6_ratemask_ptr = net->ipv6.sysctl.icmpv6_ratemask;
971
972 net->ipv6.sysctl.flowlabel_consistency = 1;
973 net->ipv6.sysctl.auto_flowlabels = IP6_DEFAULT_AUTO_FLOW_LABELS;
974 net->ipv6.sysctl.idgen_retries = 3;
975 net->ipv6.sysctl.idgen_delay = 1 * HZ;
976 net->ipv6.sysctl.flowlabel_state_ranges = 0;
977 net->ipv6.sysctl.max_dst_opts_cnt = IP6_DEFAULT_MAX_DST_OPTS_CNT;
978 net->ipv6.sysctl.max_hbh_opts_cnt = IP6_DEFAULT_MAX_HBH_OPTS_CNT;
979 net->ipv6.sysctl.max_dst_opts_len = IP6_DEFAULT_MAX_DST_OPTS_LEN;
980 net->ipv6.sysctl.max_hbh_opts_len = IP6_DEFAULT_MAX_HBH_OPTS_LEN;
981 atomic_set(&net->ipv6.fib6_sernum, 1);
982
983 err = ipv6_init_mibs(net);
984 if (err)
985 return err;
986 #ifdef CONFIG_PROC_FS
987 err = udp6_proc_init(net);
988 if (err)
989 goto out;
990 err = tcp6_proc_init(net);
991 if (err)
992 goto proc_tcp6_fail;
993 err = ac6_proc_init(net);
994 if (err)
995 goto proc_ac6_fail;
996 #endif
997 return err;
998
999 #ifdef CONFIG_PROC_FS
1000 proc_ac6_fail:
1001 tcp6_proc_exit(net);
1002 proc_tcp6_fail:
1003 udp6_proc_exit(net);
1004 out:
1005 ipv6_cleanup_mibs(net);
1006 return err;
1007 #endif
1008 }
1009
inet6_net_exit(struct net * net)1010 static void __net_exit inet6_net_exit(struct net *net)
1011 {
1012 #ifdef CONFIG_PROC_FS
1013 udp6_proc_exit(net);
1014 tcp6_proc_exit(net);
1015 ac6_proc_exit(net);
1016 #endif
1017 ipv6_cleanup_mibs(net);
1018 }
1019
1020 static struct pernet_operations inet6_net_ops = {
1021 .init = inet6_net_init,
1022 .exit = inet6_net_exit,
1023 };
1024
ipv6_route_input(struct sk_buff * skb)1025 static int ipv6_route_input(struct sk_buff *skb)
1026 {
1027 ip6_route_input(skb);
1028 return skb_dst(skb)->error;
1029 }
1030
1031 static const struct ipv6_stub ipv6_stub_impl = {
1032 .ipv6_sock_mc_join = ipv6_sock_mc_join,
1033 .ipv6_sock_mc_drop = ipv6_sock_mc_drop,
1034 .ipv6_dst_lookup_flow = ip6_dst_lookup_flow,
1035 .ipv6_route_input = ipv6_route_input,
1036 .fib6_get_table = fib6_get_table,
1037 .fib6_table_lookup = fib6_table_lookup,
1038 .fib6_lookup = fib6_lookup,
1039 .fib6_select_path = fib6_select_path,
1040 .ip6_mtu_from_fib6 = ip6_mtu_from_fib6,
1041 .fib6_nh_init = fib6_nh_init,
1042 .fib6_nh_release = fib6_nh_release,
1043 .fib6_nh_release_dsts = fib6_nh_release_dsts,
1044 .fib6_update_sernum = fib6_update_sernum_stub,
1045 .fib6_rt_update = fib6_rt_update,
1046 .ip6_del_rt = ip6_del_rt,
1047 .udpv6_encap_enable = udpv6_encap_enable,
1048 .ndisc_send_na = ndisc_send_na,
1049 #if IS_ENABLED(CONFIG_XFRM)
1050 .xfrm6_local_rxpmtu = xfrm6_local_rxpmtu,
1051 .xfrm6_udp_encap_rcv = xfrm6_udp_encap_rcv,
1052 .xfrm6_rcv_encap = xfrm6_rcv_encap,
1053 #endif
1054 .nd_tbl = &nd_tbl,
1055 .ipv6_fragment = ip6_fragment,
1056 };
1057
1058 static const struct ipv6_bpf_stub ipv6_bpf_stub_impl = {
1059 .inet6_bind = __inet6_bind,
1060 .udp6_lib_lookup = __udp6_lib_lookup,
1061 };
1062
inet6_init(void)1063 static int __init inet6_init(void)
1064 {
1065 struct list_head *r;
1066 int err = 0;
1067
1068 sock_skb_cb_check_size(sizeof(struct inet6_skb_parm));
1069
1070 /* Register the socket-side information for inet6_create. */
1071 for (r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r)
1072 INIT_LIST_HEAD(r);
1073
1074 if (disable_ipv6_mod) {
1075 pr_info("Loaded, but administratively disabled, reboot required to enable\n");
1076 goto out;
1077 }
1078
1079 err = proto_register(&tcpv6_prot, 1);
1080 if (err)
1081 goto out;
1082
1083 err = proto_register(&udpv6_prot, 1);
1084 if (err)
1085 goto out_unregister_tcp_proto;
1086
1087 err = proto_register(&udplitev6_prot, 1);
1088 if (err)
1089 goto out_unregister_udp_proto;
1090
1091 err = proto_register(&rawv6_prot, 1);
1092 if (err)
1093 goto out_unregister_udplite_proto;
1094
1095 err = proto_register(&pingv6_prot, 1);
1096 if (err)
1097 goto out_unregister_raw_proto;
1098
1099 /* We MUST register RAW sockets before we create the ICMP6,
1100 * IGMP6, or NDISC control sockets.
1101 */
1102 err = rawv6_init();
1103 if (err)
1104 goto out_unregister_ping_proto;
1105
1106 /* Register the family here so that the init calls below will
1107 * be able to create sockets. (?? is this dangerous ??)
1108 */
1109 err = sock_register(&inet6_family_ops);
1110 if (err)
1111 goto out_sock_register_fail;
1112
1113 /*
1114 * ipngwg API draft makes clear that the correct semantics
1115 * for TCP and UDP is to consider one TCP and UDP instance
1116 * in a host available by both INET and INET6 APIs and
1117 * able to communicate via both network protocols.
1118 */
1119
1120 err = register_pernet_subsys(&inet6_net_ops);
1121 if (err)
1122 goto register_pernet_fail;
1123 err = ip6_mr_init();
1124 if (err)
1125 goto ipmr_fail;
1126 err = icmpv6_init();
1127 if (err)
1128 goto icmp_fail;
1129 err = ndisc_init();
1130 if (err)
1131 goto ndisc_fail;
1132 err = igmp6_init();
1133 if (err)
1134 goto igmp_fail;
1135
1136 err = ipv6_netfilter_init();
1137 if (err)
1138 goto netfilter_fail;
1139 /* Create /proc/foo6 entries. */
1140 #ifdef CONFIG_PROC_FS
1141 err = -ENOMEM;
1142 if (raw6_proc_init())
1143 goto proc_raw6_fail;
1144 if (udplite6_proc_init())
1145 goto proc_udplite6_fail;
1146 if (ipv6_misc_proc_init())
1147 goto proc_misc6_fail;
1148 if (if6_proc_init())
1149 goto proc_if6_fail;
1150 #endif
1151 err = ip6_route_init();
1152 if (err)
1153 goto ip6_route_fail;
1154 err = ndisc_late_init();
1155 if (err)
1156 goto ndisc_late_fail;
1157 err = ip6_flowlabel_init();
1158 if (err)
1159 goto ip6_flowlabel_fail;
1160 err = ipv6_anycast_init();
1161 if (err)
1162 goto ipv6_anycast_fail;
1163 err = addrconf_init();
1164 if (err)
1165 goto addrconf_fail;
1166
1167 /* Init v6 extension headers. */
1168 err = ipv6_exthdrs_init();
1169 if (err)
1170 goto ipv6_exthdrs_fail;
1171
1172 err = ipv6_frag_init();
1173 if (err)
1174 goto ipv6_frag_fail;
1175
1176 /* Init v6 transport protocols. */
1177 err = udpv6_init();
1178 if (err)
1179 goto udpv6_fail;
1180
1181 err = udplitev6_init();
1182 if (err)
1183 goto udplitev6_fail;
1184
1185 err = udpv6_offload_init();
1186 if (err)
1187 goto udpv6_offload_fail;
1188
1189 err = tcpv6_init();
1190 if (err)
1191 goto tcpv6_fail;
1192
1193 err = ipv6_packet_init();
1194 if (err)
1195 goto ipv6_packet_fail;
1196
1197 err = pingv6_init();
1198 if (err)
1199 goto pingv6_fail;
1200
1201 err = calipso_init();
1202 if (err)
1203 goto calipso_fail;
1204
1205 err = seg6_init();
1206 if (err)
1207 goto seg6_fail;
1208
1209 err = rpl_init();
1210 if (err)
1211 goto rpl_fail;
1212
1213 err = igmp6_late_init();
1214 if (err)
1215 goto igmp6_late_err;
1216
1217 #ifdef CONFIG_SYSCTL
1218 err = ipv6_sysctl_register();
1219 if (err)
1220 goto sysctl_fail;
1221 #endif
1222
1223 /* ensure that ipv6 stubs are visible only after ipv6 is ready */
1224 wmb();
1225 ipv6_stub = &ipv6_stub_impl;
1226 ipv6_bpf_stub = &ipv6_bpf_stub_impl;
1227 out:
1228 return err;
1229
1230 #ifdef CONFIG_SYSCTL
1231 sysctl_fail:
1232 igmp6_late_cleanup();
1233 #endif
1234 igmp6_late_err:
1235 rpl_exit();
1236 rpl_fail:
1237 seg6_exit();
1238 seg6_fail:
1239 calipso_exit();
1240 calipso_fail:
1241 pingv6_exit();
1242 pingv6_fail:
1243 ipv6_packet_cleanup();
1244 ipv6_packet_fail:
1245 tcpv6_exit();
1246 tcpv6_fail:
1247 udpv6_offload_exit();
1248 udpv6_offload_fail:
1249 udplitev6_exit();
1250 udplitev6_fail:
1251 udpv6_exit();
1252 udpv6_fail:
1253 ipv6_frag_exit();
1254 ipv6_frag_fail:
1255 ipv6_exthdrs_exit();
1256 ipv6_exthdrs_fail:
1257 addrconf_cleanup();
1258 addrconf_fail:
1259 ipv6_anycast_cleanup();
1260 ipv6_anycast_fail:
1261 ip6_flowlabel_cleanup();
1262 ip6_flowlabel_fail:
1263 ndisc_late_cleanup();
1264 ndisc_late_fail:
1265 ip6_route_cleanup();
1266 ip6_route_fail:
1267 #ifdef CONFIG_PROC_FS
1268 if6_proc_exit();
1269 proc_if6_fail:
1270 ipv6_misc_proc_exit();
1271 proc_misc6_fail:
1272 udplite6_proc_exit();
1273 proc_udplite6_fail:
1274 raw6_proc_exit();
1275 proc_raw6_fail:
1276 #endif
1277 ipv6_netfilter_fini();
1278 netfilter_fail:
1279 igmp6_cleanup();
1280 igmp_fail:
1281 ndisc_cleanup();
1282 ndisc_fail:
1283 icmpv6_cleanup();
1284 icmp_fail:
1285 ip6_mr_cleanup();
1286 ipmr_fail:
1287 unregister_pernet_subsys(&inet6_net_ops);
1288 register_pernet_fail:
1289 sock_unregister(PF_INET6);
1290 rtnl_unregister_all(PF_INET6);
1291 out_sock_register_fail:
1292 rawv6_exit();
1293 out_unregister_ping_proto:
1294 proto_unregister(&pingv6_prot);
1295 out_unregister_raw_proto:
1296 proto_unregister(&rawv6_prot);
1297 out_unregister_udplite_proto:
1298 proto_unregister(&udplitev6_prot);
1299 out_unregister_udp_proto:
1300 proto_unregister(&udpv6_prot);
1301 out_unregister_tcp_proto:
1302 proto_unregister(&tcpv6_prot);
1303 goto out;
1304 }
1305 module_init(inet6_init);
1306
1307 MODULE_ALIAS_NETPROTO(PF_INET6);
1308