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 inet = inet_sk(sk);
201 inet->is_icsk = (INET_PROTOSW_ICSK & answer_flags) != 0;
202
203 if (SOCK_RAW == sock->type) {
204 inet->inet_num = protocol;
205 if (IPPROTO_RAW == protocol)
206 inet->hdrincl = 1;
207 }
208
209 sk->sk_destruct = inet6_sock_destruct;
210 sk->sk_family = PF_INET6;
211 sk->sk_protocol = protocol;
212
213 sk->sk_backlog_rcv = answer->prot->backlog_rcv;
214
215 inet_sk(sk)->pinet6 = np = inet6_sk_generic(sk);
216 np->hop_limit = -1;
217 np->mcast_hops = IPV6_DEFAULT_MCASTHOPS;
218 np->mc_loop = 1;
219 np->mc_all = 1;
220 np->pmtudisc = IPV6_PMTUDISC_WANT;
221 np->repflow = net->ipv6.sysctl.flowlabel_reflect & FLOWLABEL_REFLECT_ESTABLISHED;
222 sk->sk_ipv6only = net->ipv6.sysctl.bindv6only;
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->mc_loop = 1;
230 inet->mc_ttl = 1;
231 inet->mc_index = 0;
232 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 * Increment only the relevant sk_prot->socks debug field, this changes
241 * the previous behaviour of incrementing both the equivalent to
242 * answer->prot->socks (inet6_sock_nr) and inet_sock_nr.
243 *
244 * This allows better debug granularity as we'll know exactly how many
245 * UDPv6, TCPv6, etc socks were allocated, not the sum of all IPv6
246 * transport protocol socks. -acme
247 */
248 sk_refcnt_debug_inc(sk);
249
250 if (inet->inet_num) {
251 /* It assumes that any protocol which allows
252 * the user to assign a number at socket
253 * creation time automatically shares.
254 */
255 inet->inet_sport = htons(inet->inet_num);
256 err = sk->sk_prot->hash(sk);
257 if (err)
258 goto out_sk_release;
259 }
260 if (sk->sk_prot->init) {
261 err = sk->sk_prot->init(sk);
262 if (err)
263 goto out_sk_release;
264 }
265
266 if (!kern) {
267 err = BPF_CGROUP_RUN_PROG_INET_SOCK(sk);
268 if (err)
269 goto out_sk_release;
270 }
271 out:
272 return err;
273 out_rcu_unlock:
274 rcu_read_unlock();
275 goto out;
276 out_sk_release:
277 sk_common_release(sk);
278 sock->sk = NULL;
279 goto out;
280 }
281
__inet6_bind(struct sock * sk,struct sockaddr * uaddr,int addr_len,u32 flags)282 static int __inet6_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len,
283 u32 flags)
284 {
285 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)uaddr;
286 struct inet_sock *inet = inet_sk(sk);
287 struct ipv6_pinfo *np = inet6_sk(sk);
288 struct net *net = sock_net(sk);
289 __be32 v4addr = 0;
290 unsigned short snum;
291 bool saved_ipv6only;
292 int addr_type = 0;
293 int err = 0;
294
295 if (addr->sin6_family != AF_INET6)
296 return -EAFNOSUPPORT;
297
298 addr_type = ipv6_addr_type(&addr->sin6_addr);
299 if ((addr_type & IPV6_ADDR_MULTICAST) && sk->sk_type == SOCK_STREAM)
300 return -EINVAL;
301
302 snum = ntohs(addr->sin6_port);
303 if (snum && inet_port_requires_bind_service(net, snum) &&
304 !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE))
305 return -EACCES;
306
307 if (flags & BIND_WITH_LOCK)
308 lock_sock(sk);
309
310 /* Check these errors (active socket, double bind). */
311 if (sk->sk_state != TCP_CLOSE || inet->inet_num) {
312 err = -EINVAL;
313 goto out;
314 }
315
316 /* Check if the address belongs to the host. */
317 if (addr_type == IPV6_ADDR_MAPPED) {
318 struct net_device *dev = NULL;
319 int chk_addr_ret;
320
321 /* Binding to v4-mapped address on a v6-only socket
322 * makes no sense
323 */
324 if (sk->sk_ipv6only) {
325 err = -EINVAL;
326 goto out;
327 }
328
329 rcu_read_lock();
330 if (sk->sk_bound_dev_if) {
331 dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if);
332 if (!dev) {
333 err = -ENODEV;
334 goto out_unlock;
335 }
336 }
337
338 /* Reproduce AF_INET checks to make the bindings consistent */
339 v4addr = addr->sin6_addr.s6_addr32[3];
340 chk_addr_ret = inet_addr_type_dev_table(net, dev, v4addr);
341 rcu_read_unlock();
342
343 if (!inet_can_nonlocal_bind(net, inet) &&
344 v4addr != htonl(INADDR_ANY) &&
345 chk_addr_ret != RTN_LOCAL &&
346 chk_addr_ret != RTN_MULTICAST &&
347 chk_addr_ret != RTN_BROADCAST) {
348 err = -EADDRNOTAVAIL;
349 goto out;
350 }
351 } else {
352 if (addr_type != IPV6_ADDR_ANY) {
353 struct net_device *dev = NULL;
354
355 rcu_read_lock();
356 if (__ipv6_addr_needs_scope_id(addr_type)) {
357 if (addr_len >= sizeof(struct sockaddr_in6) &&
358 addr->sin6_scope_id) {
359 /* Override any existing binding, if another one
360 * is supplied by user.
361 */
362 sk->sk_bound_dev_if = addr->sin6_scope_id;
363 }
364
365 /* Binding to link-local address requires an interface */
366 if (!sk->sk_bound_dev_if) {
367 err = -EINVAL;
368 goto out_unlock;
369 }
370 }
371
372 if (sk->sk_bound_dev_if) {
373 dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if);
374 if (!dev) {
375 err = -ENODEV;
376 goto out_unlock;
377 }
378 }
379
380 /* ipv4 addr of the socket is invalid. Only the
381 * unspecified and mapped address have a v4 equivalent.
382 */
383 v4addr = LOOPBACK4_IPV6;
384 if (!(addr_type & IPV6_ADDR_MULTICAST)) {
385 if (!ipv6_can_nonlocal_bind(net, inet) &&
386 !ipv6_chk_addr(net, &addr->sin6_addr,
387 dev, 0)) {
388 err = -EADDRNOTAVAIL;
389 goto out_unlock;
390 }
391 }
392 rcu_read_unlock();
393 }
394 }
395
396 inet->inet_rcv_saddr = v4addr;
397 inet->inet_saddr = v4addr;
398
399 sk->sk_v6_rcv_saddr = addr->sin6_addr;
400
401 if (!(addr_type & IPV6_ADDR_MULTICAST))
402 np->saddr = addr->sin6_addr;
403
404 saved_ipv6only = sk->sk_ipv6only;
405 if (addr_type != IPV6_ADDR_ANY && addr_type != IPV6_ADDR_MAPPED)
406 sk->sk_ipv6only = 1;
407
408 /* Make sure we are allowed to bind here. */
409 if (snum || !(inet->bind_address_no_port ||
410 (flags & BIND_FORCE_ADDRESS_NO_PORT))) {
411 if (sk->sk_prot->get_port(sk, snum)) {
412 sk->sk_ipv6only = saved_ipv6only;
413 inet_reset_saddr(sk);
414 err = -EADDRINUSE;
415 goto out;
416 }
417 if (!(flags & BIND_FROM_BPF)) {
418 err = BPF_CGROUP_RUN_PROG_INET6_POST_BIND(sk);
419 if (err) {
420 sk->sk_ipv6only = saved_ipv6only;
421 inet_reset_saddr(sk);
422 goto out;
423 }
424 }
425 }
426
427 if (addr_type != IPV6_ADDR_ANY)
428 sk->sk_userlocks |= SOCK_BINDADDR_LOCK;
429 if (snum)
430 sk->sk_userlocks |= SOCK_BINDPORT_LOCK;
431 inet->inet_sport = htons(inet->inet_num);
432 inet->inet_dport = 0;
433 inet->inet_daddr = 0;
434 out:
435 if (flags & BIND_WITH_LOCK)
436 release_sock(sk);
437 return err;
438 out_unlock:
439 rcu_read_unlock();
440 goto out;
441 }
442
443 /* bind for INET6 API */
inet6_bind(struct socket * sock,struct sockaddr * uaddr,int addr_len)444 int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
445 {
446 struct sock *sk = sock->sk;
447 const struct proto *prot;
448 int err = 0;
449
450 /* If the socket has its own bind function then use it. */
451 prot = READ_ONCE(sk->sk_prot);
452 if (prot->bind)
453 return prot->bind(sk, uaddr, addr_len);
454
455 if (addr_len < SIN6_LEN_RFC2133)
456 return -EINVAL;
457
458 /* BPF prog is run before any checks are done so that if the prog
459 * changes context in a wrong way it will be caught.
460 */
461 err = BPF_CGROUP_RUN_PROG_INET6_BIND(sk, uaddr);
462 if (err)
463 return err;
464
465 return __inet6_bind(sk, uaddr, addr_len, BIND_WITH_LOCK);
466 }
467 EXPORT_SYMBOL(inet6_bind);
468
inet6_release(struct socket * sock)469 int inet6_release(struct socket *sock)
470 {
471 struct sock *sk = sock->sk;
472
473 if (!sk)
474 return -EINVAL;
475
476 /* Free mc lists */
477 ipv6_sock_mc_close(sk);
478
479 /* Free ac lists */
480 ipv6_sock_ac_close(sk);
481
482 return inet_release(sock);
483 }
484 EXPORT_SYMBOL(inet6_release);
485
inet6_destroy_sock(struct sock * sk)486 void inet6_destroy_sock(struct sock *sk)
487 {
488 struct ipv6_pinfo *np = inet6_sk(sk);
489 struct sk_buff *skb;
490 struct ipv6_txoptions *opt;
491
492 /* Release rx options */
493
494 skb = xchg(&np->pktoptions, NULL);
495 kfree_skb(skb);
496
497 skb = xchg(&np->rxpmtu, NULL);
498 kfree_skb(skb);
499
500 /* Free flowlabels */
501 fl6_free_socklist(sk);
502
503 /* Free tx options */
504
505 opt = xchg((__force struct ipv6_txoptions **)&np->opt, NULL);
506 if (opt) {
507 atomic_sub(opt->tot_len, &sk->sk_omem_alloc);
508 txopt_put(opt);
509 }
510 }
511 EXPORT_SYMBOL_GPL(inet6_destroy_sock);
512
inet6_cleanup_sock(struct sock * sk)513 void inet6_cleanup_sock(struct sock *sk)
514 {
515 inet6_destroy_sock(sk);
516 }
517 EXPORT_SYMBOL_GPL(inet6_cleanup_sock);
518
519 /*
520 * This does both peername and sockname.
521 */
inet6_getname(struct socket * sock,struct sockaddr * uaddr,int peer)522 int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
523 int peer)
524 {
525 struct sockaddr_in6 *sin = (struct sockaddr_in6 *)uaddr;
526 struct sock *sk = sock->sk;
527 struct inet_sock *inet = inet_sk(sk);
528 struct ipv6_pinfo *np = inet6_sk(sk);
529
530 sin->sin6_family = AF_INET6;
531 sin->sin6_flowinfo = 0;
532 sin->sin6_scope_id = 0;
533 if (peer) {
534 if (!inet->inet_dport)
535 return -ENOTCONN;
536 if (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) &&
537 peer == 1)
538 return -ENOTCONN;
539 sin->sin6_port = inet->inet_dport;
540 sin->sin6_addr = sk->sk_v6_daddr;
541 if (np->sndflow)
542 sin->sin6_flowinfo = np->flow_label;
543 } else {
544 if (ipv6_addr_any(&sk->sk_v6_rcv_saddr))
545 sin->sin6_addr = np->saddr;
546 else
547 sin->sin6_addr = sk->sk_v6_rcv_saddr;
548 sin->sin6_port = inet->inet_sport;
549 }
550 if (cgroup_bpf_enabled)
551 BPF_CGROUP_RUN_SA_PROG_LOCK(sk, (struct sockaddr *)sin,
552 peer ? BPF_CGROUP_INET6_GETPEERNAME :
553 BPF_CGROUP_INET6_GETSOCKNAME,
554 NULL);
555 sin->sin6_scope_id = ipv6_iface_scope_id(&sin->sin6_addr,
556 sk->sk_bound_dev_if);
557 return sizeof(*sin);
558 }
559 EXPORT_SYMBOL(inet6_getname);
560
inet6_ioctl(struct socket * sock,unsigned int cmd,unsigned long arg)561 int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
562 {
563 void __user *argp = (void __user *)arg;
564 struct sock *sk = sock->sk;
565 struct net *net = sock_net(sk);
566 const struct proto *prot;
567
568 switch (cmd) {
569 case SIOCADDRT:
570 case SIOCDELRT: {
571 struct in6_rtmsg rtmsg;
572
573 if (copy_from_user(&rtmsg, argp, sizeof(rtmsg)))
574 return -EFAULT;
575 return ipv6_route_ioctl(net, cmd, &rtmsg);
576 }
577 case SIOCSIFADDR:
578 return addrconf_add_ifaddr(net, argp);
579 case SIOCDIFADDR:
580 return addrconf_del_ifaddr(net, argp);
581 case SIOCSIFDSTADDR:
582 return addrconf_set_dstaddr(net, argp);
583 default:
584 /* IPV6_ADDRFORM can change sk->sk_prot under us. */
585 prot = READ_ONCE(sk->sk_prot);
586 if (!prot->ioctl)
587 return -ENOIOCTLCMD;
588 return prot->ioctl(sk, cmd, arg);
589 }
590 /*NOTREACHED*/
591 return 0;
592 }
593 EXPORT_SYMBOL(inet6_ioctl);
594
595 #ifdef CONFIG_COMPAT
596 struct compat_in6_rtmsg {
597 struct in6_addr rtmsg_dst;
598 struct in6_addr rtmsg_src;
599 struct in6_addr rtmsg_gateway;
600 u32 rtmsg_type;
601 u16 rtmsg_dst_len;
602 u16 rtmsg_src_len;
603 u32 rtmsg_metric;
604 u32 rtmsg_info;
605 u32 rtmsg_flags;
606 s32 rtmsg_ifindex;
607 };
608
inet6_compat_routing_ioctl(struct sock * sk,unsigned int cmd,struct compat_in6_rtmsg __user * ur)609 static int inet6_compat_routing_ioctl(struct sock *sk, unsigned int cmd,
610 struct compat_in6_rtmsg __user *ur)
611 {
612 struct in6_rtmsg rt;
613
614 if (copy_from_user(&rt.rtmsg_dst, &ur->rtmsg_dst,
615 3 * sizeof(struct in6_addr)) ||
616 get_user(rt.rtmsg_type, &ur->rtmsg_type) ||
617 get_user(rt.rtmsg_dst_len, &ur->rtmsg_dst_len) ||
618 get_user(rt.rtmsg_src_len, &ur->rtmsg_src_len) ||
619 get_user(rt.rtmsg_metric, &ur->rtmsg_metric) ||
620 get_user(rt.rtmsg_info, &ur->rtmsg_info) ||
621 get_user(rt.rtmsg_flags, &ur->rtmsg_flags) ||
622 get_user(rt.rtmsg_ifindex, &ur->rtmsg_ifindex))
623 return -EFAULT;
624
625
626 return ipv6_route_ioctl(sock_net(sk), cmd, &rt);
627 }
628
inet6_compat_ioctl(struct socket * sock,unsigned int cmd,unsigned long arg)629 int inet6_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
630 {
631 void __user *argp = compat_ptr(arg);
632 struct sock *sk = sock->sk;
633
634 switch (cmd) {
635 case SIOCADDRT:
636 case SIOCDELRT:
637 return inet6_compat_routing_ioctl(sk, cmd, argp);
638 default:
639 return -ENOIOCTLCMD;
640 }
641 }
642 EXPORT_SYMBOL_GPL(inet6_compat_ioctl);
643 #endif /* CONFIG_COMPAT */
644
645 INDIRECT_CALLABLE_DECLARE(int udpv6_sendmsg(struct sock *, struct msghdr *,
646 size_t));
inet6_sendmsg(struct socket * sock,struct msghdr * msg,size_t size)647 int inet6_sendmsg(struct socket *sock, struct msghdr *msg, size_t size)
648 {
649 struct sock *sk = sock->sk;
650 const struct proto *prot;
651
652 if (unlikely(inet_send_prepare(sk)))
653 return -EAGAIN;
654
655 /* IPV6_ADDRFORM can change sk->sk_prot under us. */
656 prot = READ_ONCE(sk->sk_prot);
657 return INDIRECT_CALL_2(prot->sendmsg, tcp_sendmsg, udpv6_sendmsg,
658 sk, msg, size);
659 }
660
661 INDIRECT_CALLABLE_DECLARE(int udpv6_recvmsg(struct sock *, struct msghdr *,
662 size_t, int, int, int *));
inet6_recvmsg(struct socket * sock,struct msghdr * msg,size_t size,int flags)663 int inet6_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
664 int flags)
665 {
666 struct sock *sk = sock->sk;
667 const struct proto *prot;
668 int addr_len = 0;
669 int err;
670
671 if (likely(!(flags & MSG_ERRQUEUE)))
672 sock_rps_record_flow(sk);
673
674 /* IPV6_ADDRFORM can change sk->sk_prot under us. */
675 prot = READ_ONCE(sk->sk_prot);
676 err = INDIRECT_CALL_2(prot->recvmsg, tcp_recvmsg, udpv6_recvmsg,
677 sk, msg, size, flags & MSG_DONTWAIT,
678 flags & ~MSG_DONTWAIT, &addr_len);
679 if (err >= 0)
680 msg->msg_namelen = addr_len;
681 return err;
682 }
683
684 const struct proto_ops inet6_stream_ops = {
685 .family = PF_INET6,
686 .owner = THIS_MODULE,
687 .release = inet6_release,
688 .bind = inet6_bind,
689 .connect = inet_stream_connect, /* ok */
690 .socketpair = sock_no_socketpair, /* a do nothing */
691 .accept = inet_accept, /* ok */
692 .getname = inet6_getname,
693 .poll = tcp_poll, /* ok */
694 .ioctl = inet6_ioctl, /* must change */
695 .gettstamp = sock_gettstamp,
696 .listen = inet_listen, /* ok */
697 .shutdown = inet_shutdown, /* ok */
698 .setsockopt = sock_common_setsockopt, /* ok */
699 .getsockopt = sock_common_getsockopt, /* ok */
700 .sendmsg = inet6_sendmsg, /* retpoline's sake */
701 .recvmsg = inet6_recvmsg, /* retpoline's sake */
702 #ifdef CONFIG_MMU
703 .mmap = tcp_mmap,
704 #endif
705 .sendpage = inet_sendpage,
706 .sendmsg_locked = tcp_sendmsg_locked,
707 .sendpage_locked = tcp_sendpage_locked,
708 .splice_read = tcp_splice_read,
709 .read_sock = tcp_read_sock,
710 .peek_len = tcp_peek_len,
711 #ifdef CONFIG_COMPAT
712 .compat_ioctl = inet6_compat_ioctl,
713 #endif
714 .set_rcvlowat = tcp_set_rcvlowat,
715 };
716
717 const struct proto_ops inet6_dgram_ops = {
718 .family = PF_INET6,
719 .owner = THIS_MODULE,
720 .release = inet6_release,
721 .bind = inet6_bind,
722 .connect = inet_dgram_connect, /* ok */
723 .socketpair = sock_no_socketpair, /* a do nothing */
724 .accept = sock_no_accept, /* a do nothing */
725 .getname = inet6_getname,
726 .poll = udp_poll, /* ok */
727 .ioctl = inet6_ioctl, /* must change */
728 .gettstamp = sock_gettstamp,
729 .listen = sock_no_listen, /* ok */
730 .shutdown = inet_shutdown, /* ok */
731 .setsockopt = sock_common_setsockopt, /* ok */
732 .getsockopt = sock_common_getsockopt, /* ok */
733 .sendmsg = inet6_sendmsg, /* retpoline's sake */
734 .recvmsg = inet6_recvmsg, /* retpoline's sake */
735 .mmap = sock_no_mmap,
736 .sendpage = sock_no_sendpage,
737 .set_peek_off = sk_set_peek_off,
738 #ifdef CONFIG_COMPAT
739 .compat_ioctl = inet6_compat_ioctl,
740 #endif
741 };
742
743 static const struct net_proto_family inet6_family_ops = {
744 .family = PF_INET6,
745 .create = inet6_create,
746 .owner = THIS_MODULE,
747 };
748
inet6_register_protosw(struct inet_protosw * p)749 int inet6_register_protosw(struct inet_protosw *p)
750 {
751 struct list_head *lh;
752 struct inet_protosw *answer;
753 struct list_head *last_perm;
754 int protocol = p->protocol;
755 int ret;
756
757 spin_lock_bh(&inetsw6_lock);
758
759 ret = -EINVAL;
760 if (p->type >= SOCK_MAX)
761 goto out_illegal;
762
763 /* If we are trying to override a permanent protocol, bail. */
764 answer = NULL;
765 ret = -EPERM;
766 last_perm = &inetsw6[p->type];
767 list_for_each(lh, &inetsw6[p->type]) {
768 answer = list_entry(lh, struct inet_protosw, list);
769
770 /* Check only the non-wild match. */
771 if (INET_PROTOSW_PERMANENT & answer->flags) {
772 if (protocol == answer->protocol)
773 break;
774 last_perm = lh;
775 }
776
777 answer = NULL;
778 }
779 if (answer)
780 goto out_permanent;
781
782 /* Add the new entry after the last permanent entry if any, so that
783 * the new entry does not override a permanent entry when matched with
784 * a wild-card protocol. But it is allowed to override any existing
785 * non-permanent entry. This means that when we remove this entry, the
786 * system automatically returns to the old behavior.
787 */
788 list_add_rcu(&p->list, last_perm);
789 ret = 0;
790 out:
791 spin_unlock_bh(&inetsw6_lock);
792 return ret;
793
794 out_permanent:
795 pr_err("Attempt to override permanent protocol %d\n", protocol);
796 goto out;
797
798 out_illegal:
799 pr_err("Ignoring attempt to register invalid socket type %d\n",
800 p->type);
801 goto out;
802 }
803 EXPORT_SYMBOL(inet6_register_protosw);
804
805 void
inet6_unregister_protosw(struct inet_protosw * p)806 inet6_unregister_protosw(struct inet_protosw *p)
807 {
808 if (INET_PROTOSW_PERMANENT & p->flags) {
809 pr_err("Attempt to unregister permanent protocol %d\n",
810 p->protocol);
811 } else {
812 spin_lock_bh(&inetsw6_lock);
813 list_del_rcu(&p->list);
814 spin_unlock_bh(&inetsw6_lock);
815
816 synchronize_net();
817 }
818 }
819 EXPORT_SYMBOL(inet6_unregister_protosw);
820
inet6_sk_rebuild_header(struct sock * sk)821 int inet6_sk_rebuild_header(struct sock *sk)
822 {
823 struct ipv6_pinfo *np = inet6_sk(sk);
824 struct dst_entry *dst;
825
826 dst = __sk_dst_check(sk, np->dst_cookie);
827
828 if (!dst) {
829 struct inet_sock *inet = inet_sk(sk);
830 struct in6_addr *final_p, final;
831 struct flowi6 fl6;
832
833 memset(&fl6, 0, sizeof(fl6));
834 fl6.flowi6_proto = sk->sk_protocol;
835 fl6.daddr = sk->sk_v6_daddr;
836 fl6.saddr = np->saddr;
837 fl6.flowlabel = np->flow_label;
838 fl6.flowi6_oif = sk->sk_bound_dev_if;
839 fl6.flowi6_mark = sk->sk_mark;
840 fl6.fl6_dport = inet->inet_dport;
841 fl6.fl6_sport = inet->inet_sport;
842 fl6.flowi6_uid = sk->sk_uid;
843 security_sk_classify_flow(sk, flowi6_to_flowi_common(&fl6));
844
845 rcu_read_lock();
846 final_p = fl6_update_dst(&fl6, rcu_dereference(np->opt),
847 &final);
848 rcu_read_unlock();
849
850 dst = ip6_dst_lookup_flow(sock_net(sk), sk, &fl6, final_p);
851 if (IS_ERR(dst)) {
852 sk->sk_route_caps = 0;
853 sk->sk_err_soft = -PTR_ERR(dst);
854 return PTR_ERR(dst);
855 }
856
857 ip6_dst_store(sk, dst, NULL, NULL);
858 }
859
860 return 0;
861 }
862 EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header);
863
ipv6_opt_accepted(const struct sock * sk,const struct sk_buff * skb,const struct inet6_skb_parm * opt)864 bool ipv6_opt_accepted(const struct sock *sk, const struct sk_buff *skb,
865 const struct inet6_skb_parm *opt)
866 {
867 const struct ipv6_pinfo *np = inet6_sk(sk);
868
869 if (np->rxopt.all) {
870 if (((opt->flags & IP6SKB_HOPBYHOP) &&
871 (np->rxopt.bits.hopopts || np->rxopt.bits.ohopopts)) ||
872 (ip6_flowinfo((struct ipv6hdr *) skb_network_header(skb)) &&
873 np->rxopt.bits.rxflow) ||
874 (opt->srcrt && (np->rxopt.bits.srcrt ||
875 np->rxopt.bits.osrcrt)) ||
876 ((opt->dst1 || opt->dst0) &&
877 (np->rxopt.bits.dstopts || np->rxopt.bits.odstopts)))
878 return true;
879 }
880 return false;
881 }
882 EXPORT_SYMBOL_GPL(ipv6_opt_accepted);
883
884 static struct packet_type ipv6_packet_type __read_mostly = {
885 .type = cpu_to_be16(ETH_P_IPV6),
886 .func = ipv6_rcv,
887 .list_func = ipv6_list_rcv,
888 };
889
ipv6_packet_init(void)890 static int __init ipv6_packet_init(void)
891 {
892 dev_add_pack(&ipv6_packet_type);
893 return 0;
894 }
895
ipv6_packet_cleanup(void)896 static void ipv6_packet_cleanup(void)
897 {
898 dev_remove_pack(&ipv6_packet_type);
899 }
900
ipv6_init_mibs(struct net * net)901 static int __net_init ipv6_init_mibs(struct net *net)
902 {
903 int i;
904
905 net->mib.udp_stats_in6 = alloc_percpu(struct udp_mib);
906 if (!net->mib.udp_stats_in6)
907 return -ENOMEM;
908 net->mib.udplite_stats_in6 = alloc_percpu(struct udp_mib);
909 if (!net->mib.udplite_stats_in6)
910 goto err_udplite_mib;
911 net->mib.ipv6_statistics = alloc_percpu(struct ipstats_mib);
912 if (!net->mib.ipv6_statistics)
913 goto err_ip_mib;
914
915 for_each_possible_cpu(i) {
916 struct ipstats_mib *af_inet6_stats;
917 af_inet6_stats = per_cpu_ptr(net->mib.ipv6_statistics, i);
918 u64_stats_init(&af_inet6_stats->syncp);
919 }
920
921
922 net->mib.icmpv6_statistics = alloc_percpu(struct icmpv6_mib);
923 if (!net->mib.icmpv6_statistics)
924 goto err_icmp_mib;
925 net->mib.icmpv6msg_statistics = kzalloc(sizeof(struct icmpv6msg_mib),
926 GFP_KERNEL);
927 if (!net->mib.icmpv6msg_statistics)
928 goto err_icmpmsg_mib;
929 return 0;
930
931 err_icmpmsg_mib:
932 free_percpu(net->mib.icmpv6_statistics);
933 err_icmp_mib:
934 free_percpu(net->mib.ipv6_statistics);
935 err_ip_mib:
936 free_percpu(net->mib.udplite_stats_in6);
937 err_udplite_mib:
938 free_percpu(net->mib.udp_stats_in6);
939 return -ENOMEM;
940 }
941
ipv6_cleanup_mibs(struct net * net)942 static void ipv6_cleanup_mibs(struct net *net)
943 {
944 free_percpu(net->mib.udp_stats_in6);
945 free_percpu(net->mib.udplite_stats_in6);
946 free_percpu(net->mib.ipv6_statistics);
947 free_percpu(net->mib.icmpv6_statistics);
948 kfree(net->mib.icmpv6msg_statistics);
949 }
950
inet6_net_init(struct net * net)951 static int __net_init inet6_net_init(struct net *net)
952 {
953 int err = 0;
954
955 net->ipv6.sysctl.bindv6only = 0;
956 net->ipv6.sysctl.icmpv6_time = 1*HZ;
957 net->ipv6.sysctl.icmpv6_echo_ignore_all = 0;
958 net->ipv6.sysctl.icmpv6_echo_ignore_multicast = 0;
959 net->ipv6.sysctl.icmpv6_echo_ignore_anycast = 0;
960
961 /* By default, rate limit error messages.
962 * Except for pmtu discovery, it would break it.
963 * proc_do_large_bitmap needs pointer to the bitmap.
964 */
965 bitmap_set(net->ipv6.sysctl.icmpv6_ratemask, 0, ICMPV6_ERRMSG_MAX + 1);
966 bitmap_clear(net->ipv6.sysctl.icmpv6_ratemask, ICMPV6_PKT_TOOBIG, 1);
967 net->ipv6.sysctl.icmpv6_ratemask_ptr = net->ipv6.sysctl.icmpv6_ratemask;
968
969 net->ipv6.sysctl.flowlabel_consistency = 1;
970 net->ipv6.sysctl.auto_flowlabels = IP6_DEFAULT_AUTO_FLOW_LABELS;
971 net->ipv6.sysctl.idgen_retries = 3;
972 net->ipv6.sysctl.idgen_delay = 1 * HZ;
973 net->ipv6.sysctl.flowlabel_state_ranges = 0;
974 net->ipv6.sysctl.max_dst_opts_cnt = IP6_DEFAULT_MAX_DST_OPTS_CNT;
975 net->ipv6.sysctl.max_hbh_opts_cnt = IP6_DEFAULT_MAX_HBH_OPTS_CNT;
976 net->ipv6.sysctl.max_dst_opts_len = IP6_DEFAULT_MAX_DST_OPTS_LEN;
977 net->ipv6.sysctl.max_hbh_opts_len = IP6_DEFAULT_MAX_HBH_OPTS_LEN;
978 atomic_set(&net->ipv6.fib6_sernum, 1);
979
980 err = ipv6_init_mibs(net);
981 if (err)
982 return err;
983 #ifdef CONFIG_PROC_FS
984 err = udp6_proc_init(net);
985 if (err)
986 goto out;
987 err = tcp6_proc_init(net);
988 if (err)
989 goto proc_tcp6_fail;
990 err = ac6_proc_init(net);
991 if (err)
992 goto proc_ac6_fail;
993 #endif
994 return err;
995
996 #ifdef CONFIG_PROC_FS
997 proc_ac6_fail:
998 tcp6_proc_exit(net);
999 proc_tcp6_fail:
1000 udp6_proc_exit(net);
1001 out:
1002 ipv6_cleanup_mibs(net);
1003 return err;
1004 #endif
1005 }
1006
inet6_net_exit(struct net * net)1007 static void __net_exit inet6_net_exit(struct net *net)
1008 {
1009 #ifdef CONFIG_PROC_FS
1010 udp6_proc_exit(net);
1011 tcp6_proc_exit(net);
1012 ac6_proc_exit(net);
1013 #endif
1014 ipv6_cleanup_mibs(net);
1015 }
1016
1017 static struct pernet_operations inet6_net_ops = {
1018 .init = inet6_net_init,
1019 .exit = inet6_net_exit,
1020 };
1021
ipv6_route_input(struct sk_buff * skb)1022 static int ipv6_route_input(struct sk_buff *skb)
1023 {
1024 ip6_route_input(skb);
1025 return skb_dst(skb)->error;
1026 }
1027
1028 static const struct ipv6_stub ipv6_stub_impl = {
1029 .ipv6_sock_mc_join = ipv6_sock_mc_join,
1030 .ipv6_sock_mc_drop = ipv6_sock_mc_drop,
1031 .ipv6_dst_lookup_flow = ip6_dst_lookup_flow,
1032 .ipv6_route_input = ipv6_route_input,
1033 .fib6_get_table = fib6_get_table,
1034 .fib6_table_lookup = fib6_table_lookup,
1035 .fib6_lookup = fib6_lookup,
1036 .fib6_select_path = fib6_select_path,
1037 .ip6_mtu_from_fib6 = ip6_mtu_from_fib6,
1038 .fib6_nh_init = fib6_nh_init,
1039 .fib6_nh_release = fib6_nh_release,
1040 .fib6_nh_release_dsts = fib6_nh_release_dsts,
1041 .fib6_update_sernum = fib6_update_sernum_stub,
1042 .fib6_rt_update = fib6_rt_update,
1043 .ip6_del_rt = ip6_del_rt,
1044 .udpv6_encap_enable = udpv6_encap_enable,
1045 .ndisc_send_na = ndisc_send_na,
1046 #if IS_ENABLED(CONFIG_XFRM)
1047 .xfrm6_local_rxpmtu = xfrm6_local_rxpmtu,
1048 .xfrm6_udp_encap_rcv = xfrm6_udp_encap_rcv,
1049 .xfrm6_rcv_encap = xfrm6_rcv_encap,
1050 #endif
1051 .nd_tbl = &nd_tbl,
1052 .ipv6_fragment = ip6_fragment,
1053 };
1054
1055 static const struct ipv6_bpf_stub ipv6_bpf_stub_impl = {
1056 .inet6_bind = __inet6_bind,
1057 .udp6_lib_lookup = __udp6_lib_lookup,
1058 };
1059
inet6_init(void)1060 static int __init inet6_init(void)
1061 {
1062 struct list_head *r;
1063 int err = 0;
1064
1065 sock_skb_cb_check_size(sizeof(struct inet6_skb_parm));
1066
1067 /* Register the socket-side information for inet6_create. */
1068 for (r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r)
1069 INIT_LIST_HEAD(r);
1070
1071 if (disable_ipv6_mod) {
1072 pr_info("Loaded, but administratively disabled, reboot required to enable\n");
1073 goto out;
1074 }
1075
1076 err = proto_register(&tcpv6_prot, 1);
1077 if (err)
1078 goto out;
1079
1080 err = proto_register(&udpv6_prot, 1);
1081 if (err)
1082 goto out_unregister_tcp_proto;
1083
1084 err = proto_register(&udplitev6_prot, 1);
1085 if (err)
1086 goto out_unregister_udp_proto;
1087
1088 err = proto_register(&rawv6_prot, 1);
1089 if (err)
1090 goto out_unregister_udplite_proto;
1091
1092 err = proto_register(&pingv6_prot, 1);
1093 if (err)
1094 goto out_unregister_raw_proto;
1095
1096 /* We MUST register RAW sockets before we create the ICMP6,
1097 * IGMP6, or NDISC control sockets.
1098 */
1099 err = rawv6_init();
1100 if (err)
1101 goto out_unregister_ping_proto;
1102
1103 /* Register the family here so that the init calls below will
1104 * be able to create sockets. (?? is this dangerous ??)
1105 */
1106 err = sock_register(&inet6_family_ops);
1107 if (err)
1108 goto out_sock_register_fail;
1109
1110 /*
1111 * ipngwg API draft makes clear that the correct semantics
1112 * for TCP and UDP is to consider one TCP and UDP instance
1113 * in a host available by both INET and INET6 APIs and
1114 * able to communicate via both network protocols.
1115 */
1116
1117 err = register_pernet_subsys(&inet6_net_ops);
1118 if (err)
1119 goto register_pernet_fail;
1120 err = ip6_mr_init();
1121 if (err)
1122 goto ipmr_fail;
1123 err = icmpv6_init();
1124 if (err)
1125 goto icmp_fail;
1126 err = ndisc_init();
1127 if (err)
1128 goto ndisc_fail;
1129 err = igmp6_init();
1130 if (err)
1131 goto igmp_fail;
1132
1133 err = ipv6_netfilter_init();
1134 if (err)
1135 goto netfilter_fail;
1136 /* Create /proc/foo6 entries. */
1137 #ifdef CONFIG_PROC_FS
1138 err = -ENOMEM;
1139 if (raw6_proc_init())
1140 goto proc_raw6_fail;
1141 if (udplite6_proc_init())
1142 goto proc_udplite6_fail;
1143 if (ipv6_misc_proc_init())
1144 goto proc_misc6_fail;
1145 if (if6_proc_init())
1146 goto proc_if6_fail;
1147 #endif
1148 err = ip6_route_init();
1149 if (err)
1150 goto ip6_route_fail;
1151 err = ndisc_late_init();
1152 if (err)
1153 goto ndisc_late_fail;
1154 err = ip6_flowlabel_init();
1155 if (err)
1156 goto ip6_flowlabel_fail;
1157 err = ipv6_anycast_init();
1158 if (err)
1159 goto ipv6_anycast_fail;
1160 err = addrconf_init();
1161 if (err)
1162 goto addrconf_fail;
1163
1164 /* Init v6 extension headers. */
1165 err = ipv6_exthdrs_init();
1166 if (err)
1167 goto ipv6_exthdrs_fail;
1168
1169 err = ipv6_frag_init();
1170 if (err)
1171 goto ipv6_frag_fail;
1172
1173 /* Init v6 transport protocols. */
1174 err = udpv6_init();
1175 if (err)
1176 goto udpv6_fail;
1177
1178 err = udplitev6_init();
1179 if (err)
1180 goto udplitev6_fail;
1181
1182 err = udpv6_offload_init();
1183 if (err)
1184 goto udpv6_offload_fail;
1185
1186 err = tcpv6_init();
1187 if (err)
1188 goto tcpv6_fail;
1189
1190 err = ipv6_packet_init();
1191 if (err)
1192 goto ipv6_packet_fail;
1193
1194 err = pingv6_init();
1195 if (err)
1196 goto pingv6_fail;
1197
1198 err = calipso_init();
1199 if (err)
1200 goto calipso_fail;
1201
1202 err = seg6_init();
1203 if (err)
1204 goto seg6_fail;
1205
1206 err = rpl_init();
1207 if (err)
1208 goto rpl_fail;
1209
1210 err = igmp6_late_init();
1211 if (err)
1212 goto igmp6_late_err;
1213
1214 #ifdef CONFIG_SYSCTL
1215 err = ipv6_sysctl_register();
1216 if (err)
1217 goto sysctl_fail;
1218 #endif
1219
1220 /* ensure that ipv6 stubs are visible only after ipv6 is ready */
1221 wmb();
1222 ipv6_stub = &ipv6_stub_impl;
1223 ipv6_bpf_stub = &ipv6_bpf_stub_impl;
1224 out:
1225 return err;
1226
1227 #ifdef CONFIG_SYSCTL
1228 sysctl_fail:
1229 igmp6_late_cleanup();
1230 #endif
1231 igmp6_late_err:
1232 rpl_exit();
1233 rpl_fail:
1234 seg6_exit();
1235 seg6_fail:
1236 calipso_exit();
1237 calipso_fail:
1238 pingv6_exit();
1239 pingv6_fail:
1240 ipv6_packet_cleanup();
1241 ipv6_packet_fail:
1242 tcpv6_exit();
1243 tcpv6_fail:
1244 udpv6_offload_exit();
1245 udpv6_offload_fail:
1246 udplitev6_exit();
1247 udplitev6_fail:
1248 udpv6_exit();
1249 udpv6_fail:
1250 ipv6_frag_exit();
1251 ipv6_frag_fail:
1252 ipv6_exthdrs_exit();
1253 ipv6_exthdrs_fail:
1254 addrconf_cleanup();
1255 addrconf_fail:
1256 ipv6_anycast_cleanup();
1257 ipv6_anycast_fail:
1258 ip6_flowlabel_cleanup();
1259 ip6_flowlabel_fail:
1260 ndisc_late_cleanup();
1261 ndisc_late_fail:
1262 ip6_route_cleanup();
1263 ip6_route_fail:
1264 #ifdef CONFIG_PROC_FS
1265 if6_proc_exit();
1266 proc_if6_fail:
1267 ipv6_misc_proc_exit();
1268 proc_misc6_fail:
1269 udplite6_proc_exit();
1270 proc_udplite6_fail:
1271 raw6_proc_exit();
1272 proc_raw6_fail:
1273 #endif
1274 ipv6_netfilter_fini();
1275 netfilter_fail:
1276 igmp6_cleanup();
1277 igmp_fail:
1278 ndisc_cleanup();
1279 ndisc_fail:
1280 icmpv6_cleanup();
1281 icmp_fail:
1282 ip6_mr_cleanup();
1283 ipmr_fail:
1284 unregister_pernet_subsys(&inet6_net_ops);
1285 register_pernet_fail:
1286 sock_unregister(PF_INET6);
1287 rtnl_unregister_all(PF_INET6);
1288 out_sock_register_fail:
1289 rawv6_exit();
1290 out_unregister_ping_proto:
1291 proto_unregister(&pingv6_prot);
1292 out_unregister_raw_proto:
1293 proto_unregister(&rawv6_prot);
1294 out_unregister_udplite_proto:
1295 proto_unregister(&udplitev6_prot);
1296 out_unregister_udp_proto:
1297 proto_unregister(&udpv6_prot);
1298 out_unregister_tcp_proto:
1299 proto_unregister(&tcpv6_prot);
1300 goto out;
1301 }
1302 module_init(inet6_init);
1303
1304 MODULE_ALIAS_NETPROTO(PF_INET6);
1305