1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21#define pr_fmt(fmt) "IPv6: " fmt
22
23#include <linux/module.h>
24#include <linux/capability.h>
25#include <linux/errno.h>
26#include <linux/types.h>
27#include <linux/socket.h>
28#include <linux/in.h>
29#include <linux/kernel.h>
30#include <linux/timer.h>
31#include <linux/string.h>
32#include <linux/sockios.h>
33#include <linux/net.h>
34#include <linux/fcntl.h>
35#include <linux/mm.h>
36#include <linux/interrupt.h>
37#include <linux/proc_fs.h>
38#include <linux/stat.h>
39#include <linux/init.h>
40#include <linux/slab.h>
41
42#include <linux/inet.h>
43#include <linux/netdevice.h>
44#include <linux/icmpv6.h>
45#include <linux/netfilter_ipv6.h>
46
47#include <net/ip.h>
48#include <net/ipv6.h>
49#include <net/udp.h>
50#include <net/udplite.h>
51#include <net/tcp.h>
52#include <net/ping.h>
53#include <net/protocol.h>
54#include <net/inet_common.h>
55#include <net/route.h>
56#include <net/transp_v6.h>
57#include <net/ip6_route.h>
58#include <net/addrconf.h>
59#include <net/ndisc.h>
60#ifdef CONFIG_IPV6_TUNNEL
61#include <net/ip6_tunnel.h>
62#endif
63
64#include <asm/uaccess.h>
65#include <linux/mroute6.h>
66
67MODULE_AUTHOR("Cast of dozens");
68MODULE_DESCRIPTION("IPv6 protocol stack for Linux");
69MODULE_LICENSE("GPL");
70
71
72
73
74static struct list_head inetsw6[SOCK_MAX];
75static DEFINE_SPINLOCK(inetsw6_lock);
76
77struct ipv6_params ipv6_defaults = {
78 .disable_ipv6 = 0,
79 .autoconf = 1,
80};
81
82static int disable_ipv6_mod;
83
84module_param_named(disable, disable_ipv6_mod, int, 0444);
85MODULE_PARM_DESC(disable, "Disable IPv6 module such that it is non-functional");
86
87module_param_named(disable_ipv6, ipv6_defaults.disable_ipv6, int, 0444);
88MODULE_PARM_DESC(disable_ipv6, "Disable IPv6 on all interfaces");
89
90module_param_named(autoconf, ipv6_defaults.autoconf, int, 0444);
91MODULE_PARM_DESC(autoconf, "Enable IPv6 address autoconfiguration on all interfaces");
92
93static __inline__ struct ipv6_pinfo *inet6_sk_generic(struct sock *sk)
94{
95 const int offset = sk->sk_prot->obj_size - sizeof(struct ipv6_pinfo);
96
97 return (struct ipv6_pinfo *)(((u8 *)sk) + offset);
98}
99
100static int inet6_create(struct net *net, struct socket *sock, int protocol,
101 int kern)
102{
103 struct inet_sock *inet;
104 struct ipv6_pinfo *np;
105 struct sock *sk;
106 struct inet_protosw *answer;
107 struct proto *answer_prot;
108 unsigned char answer_flags;
109 int try_loading_module = 0;
110 int err;
111
112
113lookup_protocol:
114 err = -ESOCKTNOSUPPORT;
115 rcu_read_lock();
116 list_for_each_entry_rcu(answer, &inetsw6[sock->type], list) {
117
118 err = 0;
119
120 if (protocol == answer->protocol) {
121 if (protocol != IPPROTO_IP)
122 break;
123 } else {
124
125 if (IPPROTO_IP == protocol) {
126 protocol = answer->protocol;
127 break;
128 }
129 if (IPPROTO_IP == answer->protocol)
130 break;
131 }
132 err = -EPROTONOSUPPORT;
133 }
134
135 if (err) {
136 if (try_loading_module < 2) {
137 rcu_read_unlock();
138
139
140
141
142 if (++try_loading_module == 1)
143 request_module("net-pf-%d-proto-%d-type-%d",
144 PF_INET6, protocol, sock->type);
145
146
147
148
149 else
150 request_module("net-pf-%d-proto-%d",
151 PF_INET6, protocol);
152 goto lookup_protocol;
153 } else
154 goto out_rcu_unlock;
155 }
156
157 err = -EPERM;
158 if (sock->type == SOCK_RAW && !kern &&
159 !ns_capable(net->user_ns, CAP_NET_RAW))
160 goto out_rcu_unlock;
161
162 sock->ops = answer->ops;
163 answer_prot = answer->prot;
164 answer_flags = answer->flags;
165 rcu_read_unlock();
166
167 WARN_ON(answer_prot->slab == NULL);
168
169 err = -ENOBUFS;
170 sk = sk_alloc(net, PF_INET6, GFP_KERNEL, answer_prot);
171 if (sk == NULL)
172 goto out;
173
174 sock_init_data(sock, sk);
175
176 err = 0;
177 if (INET_PROTOSW_REUSE & answer_flags)
178 sk->sk_reuse = SK_CAN_REUSE;
179
180 inet = inet_sk(sk);
181 inet->is_icsk = (INET_PROTOSW_ICSK & answer_flags) != 0;
182
183 if (SOCK_RAW == sock->type) {
184 inet->inet_num = protocol;
185 if (IPPROTO_RAW == protocol)
186 inet->hdrincl = 1;
187 }
188
189 sk->sk_destruct = inet_sock_destruct;
190 sk->sk_family = PF_INET6;
191 sk->sk_protocol = protocol;
192
193 sk->sk_backlog_rcv = answer->prot->backlog_rcv;
194
195 inet_sk(sk)->pinet6 = np = inet6_sk_generic(sk);
196 np->hop_limit = -1;
197 np->mcast_hops = IPV6_DEFAULT_MCASTHOPS;
198 np->mc_loop = 1;
199 np->pmtudisc = IPV6_PMTUDISC_WANT;
200 sk->sk_ipv6only = net->ipv6.sysctl.bindv6only;
201
202
203
204
205 inet->uc_ttl = -1;
206
207 inet->mc_loop = 1;
208 inet->mc_ttl = 1;
209 inet->mc_index = 0;
210 inet->mc_list = NULL;
211 inet->rcv_tos = 0;
212
213 if (net->ipv4.sysctl_ip_no_pmtu_disc)
214 inet->pmtudisc = IP_PMTUDISC_DONT;
215 else
216 inet->pmtudisc = IP_PMTUDISC_WANT;
217
218
219
220
221
222
223
224
225
226 sk_refcnt_debug_inc(sk);
227
228 if (inet->inet_num) {
229
230
231
232
233 inet->inet_sport = htons(inet->inet_num);
234 sk->sk_prot->hash(sk);
235 }
236 if (sk->sk_prot->init) {
237 err = sk->sk_prot->init(sk);
238 if (err) {
239 sk_common_release(sk);
240 goto out;
241 }
242 }
243out:
244 return err;
245out_rcu_unlock:
246 rcu_read_unlock();
247 goto out;
248}
249
250
251
252int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
253{
254 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)uaddr;
255 struct sock *sk = sock->sk;
256 struct inet_sock *inet = inet_sk(sk);
257 struct ipv6_pinfo *np = inet6_sk(sk);
258 struct net *net = sock_net(sk);
259 __be32 v4addr = 0;
260 unsigned short snum;
261 int addr_type = 0;
262 int err = 0;
263
264
265 if (sk->sk_prot->bind)
266 return sk->sk_prot->bind(sk, uaddr, addr_len);
267
268 if (addr_len < SIN6_LEN_RFC2133)
269 return -EINVAL;
270
271 if (addr->sin6_family != AF_INET6)
272 return -EAFNOSUPPORT;
273
274 addr_type = ipv6_addr_type(&addr->sin6_addr);
275 if ((addr_type & IPV6_ADDR_MULTICAST) && sock->type == SOCK_STREAM)
276 return -EINVAL;
277
278 snum = ntohs(addr->sin6_port);
279 if (snum && snum < PROT_SOCK && !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE))
280 return -EACCES;
281
282 lock_sock(sk);
283
284
285 if (sk->sk_state != TCP_CLOSE || inet->inet_num) {
286 err = -EINVAL;
287 goto out;
288 }
289
290
291 if (addr_type == IPV6_ADDR_MAPPED) {
292 int chk_addr_ret;
293
294
295
296
297 if (sk->sk_ipv6only) {
298 err = -EINVAL;
299 goto out;
300 }
301
302
303 v4addr = addr->sin6_addr.s6_addr32[3];
304 chk_addr_ret = inet_addr_type(net, v4addr);
305 if (!net->ipv4.sysctl_ip_nonlocal_bind &&
306 !(inet->freebind || inet->transparent) &&
307 v4addr != htonl(INADDR_ANY) &&
308 chk_addr_ret != RTN_LOCAL &&
309 chk_addr_ret != RTN_MULTICAST &&
310 chk_addr_ret != RTN_BROADCAST) {
311 err = -EADDRNOTAVAIL;
312 goto out;
313 }
314 } else {
315 if (addr_type != IPV6_ADDR_ANY) {
316 struct net_device *dev = NULL;
317
318 rcu_read_lock();
319 if (__ipv6_addr_needs_scope_id(addr_type)) {
320 if (addr_len >= sizeof(struct sockaddr_in6) &&
321 addr->sin6_scope_id) {
322
323
324
325 sk->sk_bound_dev_if = addr->sin6_scope_id;
326 }
327
328
329 if (!sk->sk_bound_dev_if) {
330 err = -EINVAL;
331 goto out_unlock;
332 }
333 dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if);
334 if (!dev) {
335 err = -ENODEV;
336 goto out_unlock;
337 }
338 }
339
340
341
342
343 v4addr = LOOPBACK4_IPV6;
344 if (!(addr_type & IPV6_ADDR_MULTICAST)) {
345 if (!(inet->freebind || inet->transparent) &&
346 !ipv6_chk_addr(net, &addr->sin6_addr,
347 dev, 0)) {
348 err = -EADDRNOTAVAIL;
349 goto out_unlock;
350 }
351 }
352 rcu_read_unlock();
353 }
354 }
355
356 inet->inet_rcv_saddr = v4addr;
357 inet->inet_saddr = v4addr;
358
359 sk->sk_v6_rcv_saddr = addr->sin6_addr;
360
361 if (!(addr_type & IPV6_ADDR_MULTICAST))
362 np->saddr = addr->sin6_addr;
363
364
365 if (sk->sk_prot->get_port(sk, snum)) {
366 inet_reset_saddr(sk);
367 err = -EADDRINUSE;
368 goto out;
369 }
370
371 if (addr_type != IPV6_ADDR_ANY) {
372 sk->sk_userlocks |= SOCK_BINDADDR_LOCK;
373 if (addr_type != IPV6_ADDR_MAPPED)
374 sk->sk_ipv6only = 1;
375 }
376 if (snum)
377 sk->sk_userlocks |= SOCK_BINDPORT_LOCK;
378 inet->inet_sport = htons(inet->inet_num);
379 inet->inet_dport = 0;
380 inet->inet_daddr = 0;
381out:
382 release_sock(sk);
383 return err;
384out_unlock:
385 rcu_read_unlock();
386 goto out;
387}
388EXPORT_SYMBOL(inet6_bind);
389
390int inet6_release(struct socket *sock)
391{
392 struct sock *sk = sock->sk;
393
394 if (sk == NULL)
395 return -EINVAL;
396
397
398 ipv6_sock_mc_close(sk);
399
400
401 ipv6_sock_ac_close(sk);
402
403 return inet_release(sock);
404}
405EXPORT_SYMBOL(inet6_release);
406
407void inet6_destroy_sock(struct sock *sk)
408{
409 struct ipv6_pinfo *np = inet6_sk(sk);
410 struct sk_buff *skb;
411 struct ipv6_txoptions *opt;
412
413
414
415 skb = xchg(&np->pktoptions, NULL);
416 if (skb != NULL)
417 kfree_skb(skb);
418
419 skb = xchg(&np->rxpmtu, NULL);
420 if (skb != NULL)
421 kfree_skb(skb);
422
423
424 fl6_free_socklist(sk);
425
426
427
428 opt = xchg(&np->opt, NULL);
429 if (opt != NULL)
430 sock_kfree_s(sk, opt, opt->tot_len);
431}
432EXPORT_SYMBOL_GPL(inet6_destroy_sock);
433
434
435
436
437
438int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
439 int *uaddr_len, int peer)
440{
441 struct sockaddr_in6 *sin = (struct sockaddr_in6 *)uaddr;
442 struct sock *sk = sock->sk;
443 struct inet_sock *inet = inet_sk(sk);
444 struct ipv6_pinfo *np = inet6_sk(sk);
445
446 sin->sin6_family = AF_INET6;
447 sin->sin6_flowinfo = 0;
448 sin->sin6_scope_id = 0;
449 if (peer) {
450 if (!inet->inet_dport)
451 return -ENOTCONN;
452 if (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) &&
453 peer == 1)
454 return -ENOTCONN;
455 sin->sin6_port = inet->inet_dport;
456 sin->sin6_addr = sk->sk_v6_daddr;
457 if (np->sndflow)
458 sin->sin6_flowinfo = np->flow_label;
459 } else {
460 if (ipv6_addr_any(&sk->sk_v6_rcv_saddr))
461 sin->sin6_addr = np->saddr;
462 else
463 sin->sin6_addr = sk->sk_v6_rcv_saddr;
464
465 sin->sin6_port = inet->inet_sport;
466 }
467 sin->sin6_scope_id = ipv6_iface_scope_id(&sin->sin6_addr,
468 sk->sk_bound_dev_if);
469 *uaddr_len = sizeof(*sin);
470 return 0;
471}
472EXPORT_SYMBOL(inet6_getname);
473
474int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
475{
476 struct sock *sk = sock->sk;
477 struct net *net = sock_net(sk);
478
479 switch (cmd) {
480 case SIOCGSTAMP:
481 return sock_get_timestamp(sk, (struct timeval __user *)arg);
482
483 case SIOCGSTAMPNS:
484 return sock_get_timestampns(sk, (struct timespec __user *)arg);
485
486 case SIOCADDRT:
487 case SIOCDELRT:
488
489 return ipv6_route_ioctl(net, cmd, (void __user *)arg);
490
491 case SIOCSIFADDR:
492 return addrconf_add_ifaddr(net, (void __user *) arg);
493 case SIOCDIFADDR:
494 return addrconf_del_ifaddr(net, (void __user *) arg);
495 case SIOCSIFDSTADDR:
496 return addrconf_set_dstaddr(net, (void __user *) arg);
497 default:
498 if (!sk->sk_prot->ioctl)
499 return -ENOIOCTLCMD;
500 return sk->sk_prot->ioctl(sk, cmd, arg);
501 }
502
503 return 0;
504}
505EXPORT_SYMBOL(inet6_ioctl);
506
507const struct proto_ops inet6_stream_ops = {
508 .family = PF_INET6,
509 .owner = THIS_MODULE,
510 .release = inet6_release,
511 .bind = inet6_bind,
512 .connect = inet_stream_connect,
513 .socketpair = sock_no_socketpair,
514 .accept = inet_accept,
515 .getname = inet6_getname,
516 .poll = tcp_poll,
517 .ioctl = inet6_ioctl,
518 .listen = inet_listen,
519 .shutdown = inet_shutdown,
520 .setsockopt = sock_common_setsockopt,
521 .getsockopt = sock_common_getsockopt,
522 .sendmsg = inet_sendmsg,
523 .recvmsg = inet_recvmsg,
524 .mmap = sock_no_mmap,
525 .sendpage = inet_sendpage,
526 .splice_read = tcp_splice_read,
527#ifdef CONFIG_COMPAT
528 .compat_setsockopt = compat_sock_common_setsockopt,
529 .compat_getsockopt = compat_sock_common_getsockopt,
530#endif
531};
532
533const struct proto_ops inet6_dgram_ops = {
534 .family = PF_INET6,
535 .owner = THIS_MODULE,
536 .release = inet6_release,
537 .bind = inet6_bind,
538 .connect = inet_dgram_connect,
539 .socketpair = sock_no_socketpair,
540 .accept = sock_no_accept,
541 .getname = inet6_getname,
542 .poll = udp_poll,
543 .ioctl = inet6_ioctl,
544 .listen = sock_no_listen,
545 .shutdown = inet_shutdown,
546 .setsockopt = sock_common_setsockopt,
547 .getsockopt = sock_common_getsockopt,
548 .sendmsg = inet_sendmsg,
549 .recvmsg = inet_recvmsg,
550 .mmap = sock_no_mmap,
551 .sendpage = sock_no_sendpage,
552#ifdef CONFIG_COMPAT
553 .compat_setsockopt = compat_sock_common_setsockopt,
554 .compat_getsockopt = compat_sock_common_getsockopt,
555#endif
556};
557
558static const struct net_proto_family inet6_family_ops = {
559 .family = PF_INET6,
560 .create = inet6_create,
561 .owner = THIS_MODULE,
562};
563
564int inet6_register_protosw(struct inet_protosw *p)
565{
566 struct list_head *lh;
567 struct inet_protosw *answer;
568 struct list_head *last_perm;
569 int protocol = p->protocol;
570 int ret;
571
572 spin_lock_bh(&inetsw6_lock);
573
574 ret = -EINVAL;
575 if (p->type >= SOCK_MAX)
576 goto out_illegal;
577
578
579 answer = NULL;
580 ret = -EPERM;
581 last_perm = &inetsw6[p->type];
582 list_for_each(lh, &inetsw6[p->type]) {
583 answer = list_entry(lh, struct inet_protosw, list);
584
585
586 if (INET_PROTOSW_PERMANENT & answer->flags) {
587 if (protocol == answer->protocol)
588 break;
589 last_perm = lh;
590 }
591
592 answer = NULL;
593 }
594 if (answer)
595 goto out_permanent;
596
597
598
599
600
601
602
603 list_add_rcu(&p->list, last_perm);
604 ret = 0;
605out:
606 spin_unlock_bh(&inetsw6_lock);
607 return ret;
608
609out_permanent:
610 pr_err("Attempt to override permanent protocol %d\n", protocol);
611 goto out;
612
613out_illegal:
614 pr_err("Ignoring attempt to register invalid socket type %d\n",
615 p->type);
616 goto out;
617}
618EXPORT_SYMBOL(inet6_register_protosw);
619
620void
621inet6_unregister_protosw(struct inet_protosw *p)
622{
623 if (INET_PROTOSW_PERMANENT & p->flags) {
624 pr_err("Attempt to unregister permanent protocol %d\n",
625 p->protocol);
626 } else {
627 spin_lock_bh(&inetsw6_lock);
628 list_del_rcu(&p->list);
629 spin_unlock_bh(&inetsw6_lock);
630
631 synchronize_net();
632 }
633}
634EXPORT_SYMBOL(inet6_unregister_protosw);
635
636int inet6_sk_rebuild_header(struct sock *sk)
637{
638 struct ipv6_pinfo *np = inet6_sk(sk);
639 struct dst_entry *dst;
640
641 dst = __sk_dst_check(sk, np->dst_cookie);
642
643 if (dst == NULL) {
644 struct inet_sock *inet = inet_sk(sk);
645 struct in6_addr *final_p, final;
646 struct flowi6 fl6;
647
648 memset(&fl6, 0, sizeof(fl6));
649 fl6.flowi6_proto = sk->sk_protocol;
650 fl6.daddr = sk->sk_v6_daddr;
651 fl6.saddr = np->saddr;
652 fl6.flowlabel = np->flow_label;
653 fl6.flowi6_oif = sk->sk_bound_dev_if;
654 fl6.flowi6_mark = sk->sk_mark;
655 fl6.fl6_dport = inet->inet_dport;
656 fl6.fl6_sport = inet->inet_sport;
657 security_sk_classify_flow(sk, flowi6_to_flowi(&fl6));
658
659 final_p = fl6_update_dst(&fl6, np->opt, &final);
660
661 dst = ip6_dst_lookup_flow(sk, &fl6, final_p);
662 if (IS_ERR(dst)) {
663 sk->sk_route_caps = 0;
664 sk->sk_err_soft = -PTR_ERR(dst);
665 return PTR_ERR(dst);
666 }
667
668 __ip6_dst_store(sk, dst, NULL, NULL);
669 }
670
671 return 0;
672}
673EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header);
674
675bool ipv6_opt_accepted(const struct sock *sk, const struct sk_buff *skb,
676 const struct inet6_skb_parm *opt)
677{
678 const struct ipv6_pinfo *np = inet6_sk(sk);
679
680 if (np->rxopt.all) {
681 if ((opt->hop && (np->rxopt.bits.hopopts ||
682 np->rxopt.bits.ohopopts)) ||
683 (ip6_flowinfo((struct ipv6hdr *) skb_network_header(skb)) &&
684 np->rxopt.bits.rxflow) ||
685 (opt->srcrt && (np->rxopt.bits.srcrt ||
686 np->rxopt.bits.osrcrt)) ||
687 ((opt->dst1 || opt->dst0) &&
688 (np->rxopt.bits.dstopts || np->rxopt.bits.odstopts)))
689 return true;
690 }
691 return false;
692}
693EXPORT_SYMBOL_GPL(ipv6_opt_accepted);
694
695static struct packet_type ipv6_packet_type __read_mostly = {
696 .type = cpu_to_be16(ETH_P_IPV6),
697 .func = ipv6_rcv,
698};
699
700static int __init ipv6_packet_init(void)
701{
702 dev_add_pack(&ipv6_packet_type);
703 return 0;
704}
705
706static void ipv6_packet_cleanup(void)
707{
708 dev_remove_pack(&ipv6_packet_type);
709}
710
711static int __net_init ipv6_init_mibs(struct net *net)
712{
713 int i;
714
715 net->mib.udp_stats_in6 = alloc_percpu(struct udp_mib);
716 if (!net->mib.udp_stats_in6)
717 return -ENOMEM;
718 net->mib.udplite_stats_in6 = alloc_percpu(struct udp_mib);
719 if (!net->mib.udplite_stats_in6)
720 goto err_udplite_mib;
721 net->mib.ipv6_statistics = alloc_percpu(struct ipstats_mib);
722 if (!net->mib.ipv6_statistics)
723 goto err_ip_mib;
724
725 for_each_possible_cpu(i) {
726 struct ipstats_mib *af_inet6_stats;
727 af_inet6_stats = per_cpu_ptr(net->mib.ipv6_statistics, i);
728 u64_stats_init(&af_inet6_stats->syncp);
729 }
730
731
732 net->mib.icmpv6_statistics = alloc_percpu(struct icmpv6_mib);
733 if (!net->mib.icmpv6_statistics)
734 goto err_icmp_mib;
735 net->mib.icmpv6msg_statistics = kzalloc(sizeof(struct icmpv6msg_mib),
736 GFP_KERNEL);
737 if (!net->mib.icmpv6msg_statistics)
738 goto err_icmpmsg_mib;
739 return 0;
740
741err_icmpmsg_mib:
742 free_percpu(net->mib.icmpv6_statistics);
743err_icmp_mib:
744 free_percpu(net->mib.ipv6_statistics);
745err_ip_mib:
746 free_percpu(net->mib.udplite_stats_in6);
747err_udplite_mib:
748 free_percpu(net->mib.udp_stats_in6);
749 return -ENOMEM;
750}
751
752static void ipv6_cleanup_mibs(struct net *net)
753{
754 free_percpu(net->mib.udp_stats_in6);
755 free_percpu(net->mib.udplite_stats_in6);
756 free_percpu(net->mib.ipv6_statistics);
757 free_percpu(net->mib.icmpv6_statistics);
758 kfree(net->mib.icmpv6msg_statistics);
759}
760
761static int __net_init inet6_net_init(struct net *net)
762{
763 int err = 0;
764
765 net->ipv6.sysctl.bindv6only = 0;
766 net->ipv6.sysctl.icmpv6_time = 1*HZ;
767 net->ipv6.sysctl.flowlabel_consistency = 1;
768 net->ipv6.sysctl.auto_flowlabels = 0;
769 atomic_set(&net->ipv6.fib6_sernum, 1);
770
771 err = ipv6_init_mibs(net);
772 if (err)
773 return err;
774#ifdef CONFIG_PROC_FS
775 err = udp6_proc_init(net);
776 if (err)
777 goto out;
778 err = tcp6_proc_init(net);
779 if (err)
780 goto proc_tcp6_fail;
781 err = ac6_proc_init(net);
782 if (err)
783 goto proc_ac6_fail;
784#endif
785 return err;
786
787#ifdef CONFIG_PROC_FS
788proc_ac6_fail:
789 tcp6_proc_exit(net);
790proc_tcp6_fail:
791 udp6_proc_exit(net);
792out:
793 ipv6_cleanup_mibs(net);
794 return err;
795#endif
796}
797
798static void __net_exit inet6_net_exit(struct net *net)
799{
800#ifdef CONFIG_PROC_FS
801 udp6_proc_exit(net);
802 tcp6_proc_exit(net);
803 ac6_proc_exit(net);
804#endif
805 ipv6_cleanup_mibs(net);
806}
807
808static struct pernet_operations inet6_net_ops = {
809 .init = inet6_net_init,
810 .exit = inet6_net_exit,
811};
812
813static const struct ipv6_stub ipv6_stub_impl = {
814 .ipv6_sock_mc_join = ipv6_sock_mc_join,
815 .ipv6_sock_mc_drop = ipv6_sock_mc_drop,
816 .ipv6_dst_lookup = ip6_dst_lookup,
817 .udpv6_encap_enable = udpv6_encap_enable,
818 .ndisc_send_na = ndisc_send_na,
819 .nd_tbl = &nd_tbl,
820};
821
822static int __init inet6_init(void)
823{
824 struct list_head *r;
825 int err = 0;
826
827 BUILD_BUG_ON(sizeof(struct inet6_skb_parm) > FIELD_SIZEOF(struct sk_buff, cb));
828
829
830 for (r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r)
831 INIT_LIST_HEAD(r);
832
833 if (disable_ipv6_mod) {
834 pr_info("Loaded, but administratively disabled, reboot required to enable\n");
835 goto out;
836 }
837
838 err = proto_register(&tcpv6_prot, 1);
839 if (err)
840 goto out;
841
842 err = proto_register(&udpv6_prot, 1);
843 if (err)
844 goto out_unregister_tcp_proto;
845
846 err = proto_register(&udplitev6_prot, 1);
847 if (err)
848 goto out_unregister_udp_proto;
849
850 err = proto_register(&rawv6_prot, 1);
851 if (err)
852 goto out_unregister_udplite_proto;
853
854 err = proto_register(&pingv6_prot, 1);
855 if (err)
856 goto out_unregister_ping_proto;
857
858
859
860
861 err = rawv6_init();
862 if (err)
863 goto out_unregister_raw_proto;
864
865
866
867
868 err = sock_register(&inet6_family_ops);
869 if (err)
870 goto out_sock_register_fail;
871
872
873
874
875
876
877
878
879 err = register_pernet_subsys(&inet6_net_ops);
880 if (err)
881 goto register_pernet_fail;
882 err = icmpv6_init();
883 if (err)
884 goto icmp_fail;
885 err = ip6_mr_init();
886 if (err)
887 goto ipmr_fail;
888 err = ndisc_init();
889 if (err)
890 goto ndisc_fail;
891 err = igmp6_init();
892 if (err)
893 goto igmp_fail;
894
895 ipv6_stub = &ipv6_stub_impl;
896
897 err = ipv6_netfilter_init();
898 if (err)
899 goto netfilter_fail;
900
901#ifdef CONFIG_PROC_FS
902 err = -ENOMEM;
903 if (raw6_proc_init())
904 goto proc_raw6_fail;
905 if (udplite6_proc_init())
906 goto proc_udplite6_fail;
907 if (ipv6_misc_proc_init())
908 goto proc_misc6_fail;
909 if (if6_proc_init())
910 goto proc_if6_fail;
911#endif
912 err = ip6_route_init();
913 if (err)
914 goto ip6_route_fail;
915 err = ndisc_late_init();
916 if (err)
917 goto ndisc_late_fail;
918 err = ip6_flowlabel_init();
919 if (err)
920 goto ip6_flowlabel_fail;
921 err = addrconf_init();
922 if (err)
923 goto addrconf_fail;
924
925
926 err = ipv6_exthdrs_init();
927 if (err)
928 goto ipv6_exthdrs_fail;
929
930 err = ipv6_frag_init();
931 if (err)
932 goto ipv6_frag_fail;
933
934
935 err = udpv6_init();
936 if (err)
937 goto udpv6_fail;
938
939 err = udplitev6_init();
940 if (err)
941 goto udplitev6_fail;
942
943 err = tcpv6_init();
944 if (err)
945 goto tcpv6_fail;
946
947 err = ipv6_packet_init();
948 if (err)
949 goto ipv6_packet_fail;
950
951 err = pingv6_init();
952 if (err)
953 goto pingv6_fail;
954
955#ifdef CONFIG_SYSCTL
956 err = ipv6_sysctl_register();
957 if (err)
958 goto sysctl_fail;
959#endif
960out:
961 return err;
962
963#ifdef CONFIG_SYSCTL
964sysctl_fail:
965 pingv6_exit();
966#endif
967pingv6_fail:
968 ipv6_packet_cleanup();
969ipv6_packet_fail:
970 tcpv6_exit();
971tcpv6_fail:
972 udplitev6_exit();
973udplitev6_fail:
974 udpv6_exit();
975udpv6_fail:
976 ipv6_frag_exit();
977ipv6_frag_fail:
978 ipv6_exthdrs_exit();
979ipv6_exthdrs_fail:
980 addrconf_cleanup();
981addrconf_fail:
982 ip6_flowlabel_cleanup();
983ip6_flowlabel_fail:
984 ndisc_late_cleanup();
985ndisc_late_fail:
986 ip6_route_cleanup();
987ip6_route_fail:
988#ifdef CONFIG_PROC_FS
989 if6_proc_exit();
990proc_if6_fail:
991 ipv6_misc_proc_exit();
992proc_misc6_fail:
993 udplite6_proc_exit();
994proc_udplite6_fail:
995 raw6_proc_exit();
996proc_raw6_fail:
997#endif
998 ipv6_netfilter_fini();
999netfilter_fail:
1000 igmp6_cleanup();
1001igmp_fail:
1002 ndisc_cleanup();
1003ndisc_fail:
1004 ip6_mr_cleanup();
1005ipmr_fail:
1006 icmpv6_cleanup();
1007icmp_fail:
1008 unregister_pernet_subsys(&inet6_net_ops);
1009register_pernet_fail:
1010 sock_unregister(PF_INET6);
1011 rtnl_unregister_all(PF_INET6);
1012out_sock_register_fail:
1013 rawv6_exit();
1014out_unregister_ping_proto:
1015 proto_unregister(&pingv6_prot);
1016out_unregister_raw_proto:
1017 proto_unregister(&rawv6_prot);
1018out_unregister_udplite_proto:
1019 proto_unregister(&udplitev6_prot);
1020out_unregister_udp_proto:
1021 proto_unregister(&udpv6_prot);
1022out_unregister_tcp_proto:
1023 proto_unregister(&tcpv6_prot);
1024 goto out;
1025}
1026module_init(inet6_init);
1027
1028MODULE_ALIAS_NETPROTO(PF_INET6);
1029