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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/protocol.h>
53#include <net/inet_common.h>
54#include <net/route.h>
55#include <net/transp_v6.h>
56#include <net/ip6_route.h>
57#include <net/addrconf.h>
58#include <net/ndisc.h>
59#ifdef CONFIG_IPV6_TUNNEL
60#include <net/ip6_tunnel.h>
61#endif
62
63#include <asm/uaccess.h>
64#include <linux/mroute6.h>
65
66#include "ip6_offload.h"
67
68MODULE_AUTHOR("Cast of dozens");
69MODULE_DESCRIPTION("IPv6 protocol stack for Linux");
70MODULE_LICENSE("GPL");
71
72
73
74
75static struct list_head inetsw6[SOCK_MAX];
76static DEFINE_SPINLOCK(inetsw6_lock);
77
78struct ipv6_params ipv6_defaults = {
79 .disable_ipv6 = 0,
80 .autoconf = 1,
81};
82
83static int disable_ipv6_mod;
84
85module_param_named(disable, disable_ipv6_mod, int, 0444);
86MODULE_PARM_DESC(disable, "Disable IPv6 module such that it is non-functional");
87
88module_param_named(disable_ipv6, ipv6_defaults.disable_ipv6, int, 0444);
89MODULE_PARM_DESC(disable_ipv6, "Disable IPv6 on all interfaces");
90
91module_param_named(autoconf, ipv6_defaults.autoconf, int, 0444);
92MODULE_PARM_DESC(autoconf, "Enable IPv6 address autoconfiguration on all interfaces");
93
94bool ipv6_mod_enabled(void)
95{
96 return disable_ipv6_mod == 0;
97}
98EXPORT_SYMBOL_GPL(ipv6_mod_enabled);
99
100static __inline__ struct ipv6_pinfo *inet6_sk_generic(struct sock *sk)
101{
102 const int offset = sk->sk_prot->obj_size - sizeof(struct ipv6_pinfo);
103
104 return (struct ipv6_pinfo *)(((u8 *)sk) + offset);
105}
106
107static int inet6_create(struct net *net, struct socket *sock, int protocol,
108 int kern)
109{
110 struct inet_sock *inet;
111 struct ipv6_pinfo *np;
112 struct sock *sk;
113 struct inet_protosw *answer;
114 struct proto *answer_prot;
115 unsigned char answer_flags;
116 int try_loading_module = 0;
117 int err;
118
119 if (protocol < 0 || protocol >= IPPROTO_MAX)
120 return -EINVAL;
121
122
123lookup_protocol:
124 err = -ESOCKTNOSUPPORT;
125 rcu_read_lock();
126 list_for_each_entry_rcu(answer, &inetsw6[sock->type], list) {
127
128 err = 0;
129
130 if (protocol == answer->protocol) {
131 if (protocol != IPPROTO_IP)
132 break;
133 } else {
134
135 if (IPPROTO_IP == protocol) {
136 protocol = answer->protocol;
137 break;
138 }
139 if (IPPROTO_IP == answer->protocol)
140 break;
141 }
142 err = -EPROTONOSUPPORT;
143 }
144
145 if (err) {
146 if (try_loading_module < 2) {
147 rcu_read_unlock();
148
149
150
151
152 if (++try_loading_module == 1)
153 request_module("net-pf-%d-proto-%d-type-%d",
154 PF_INET6, protocol, sock->type);
155
156
157
158
159 else
160 request_module("net-pf-%d-proto-%d",
161 PF_INET6, protocol);
162 goto lookup_protocol;
163 } else
164 goto out_rcu_unlock;
165 }
166
167 err = -EPERM;
168 if (sock->type == SOCK_RAW && !kern &&
169 !ns_capable(net->user_ns, CAP_NET_RAW))
170 goto out_rcu_unlock;
171
172 sock->ops = answer->ops;
173 answer_prot = answer->prot;
174 answer_flags = answer->flags;
175 rcu_read_unlock();
176
177 WARN_ON(answer_prot->slab == NULL);
178
179 err = -ENOBUFS;
180 sk = sk_alloc(net, PF_INET6, GFP_KERNEL, answer_prot);
181 if (sk == NULL)
182 goto out;
183
184 sock_init_data(sock, sk);
185
186 err = 0;
187 if (INET_PROTOSW_REUSE & answer_flags)
188 sk->sk_reuse = SK_CAN_REUSE;
189
190 inet = inet_sk(sk);
191 inet->is_icsk = (INET_PROTOSW_ICSK & answer_flags) != 0;
192
193 if (SOCK_RAW == sock->type) {
194 inet->inet_num = protocol;
195 if (IPPROTO_RAW == protocol)
196 inet->hdrincl = 1;
197 }
198
199 sk->sk_destruct = inet_sock_destruct;
200 sk->sk_family = PF_INET6;
201 sk->sk_protocol = protocol;
202
203 sk->sk_backlog_rcv = answer->prot->backlog_rcv;
204
205 inet_sk(sk)->pinet6 = np = inet6_sk_generic(sk);
206 np->hop_limit = -1;
207 np->mcast_hops = IPV6_DEFAULT_MCASTHOPS;
208 np->mc_loop = 1;
209 np->pmtudisc = IPV6_PMTUDISC_WANT;
210 np->ipv6only = net->ipv6.sysctl.bindv6only;
211
212
213
214
215 inet->uc_ttl = -1;
216
217 inet->mc_loop = 1;
218 inet->mc_ttl = 1;
219 inet->mc_index = 0;
220 inet->mc_list = NULL;
221 inet->rcv_tos = 0;
222
223 if (net->sysctl_ip_no_pmtu_disc)
224 inet->pmtudisc = IP_PMTUDISC_DONT;
225 else
226 inet->pmtudisc = IP_PMTUDISC_WANT;
227
228
229
230
231
232
233
234
235
236 sk_refcnt_debug_inc(sk);
237
238 if (inet->inet_num) {
239
240
241
242
243 inet->inet_sport = htons(inet->inet_num);
244 sk->sk_prot->hash(sk);
245 }
246 if (sk->sk_prot->init) {
247 err = sk->sk_prot->init(sk);
248 if (err) {
249 sk_common_release(sk);
250 goto out;
251 }
252 }
253out:
254 return err;
255out_rcu_unlock:
256 rcu_read_unlock();
257 goto out;
258}
259
260
261
262int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
263{
264 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)uaddr;
265 struct sock *sk = sock->sk;
266 struct inet_sock *inet = inet_sk(sk);
267 struct ipv6_pinfo *np = inet6_sk(sk);
268 struct net *net = sock_net(sk);
269 __be32 v4addr = 0;
270 unsigned short snum;
271 int addr_type = 0;
272 int err = 0;
273
274
275 if (sk->sk_prot->bind)
276 return sk->sk_prot->bind(sk, uaddr, addr_len);
277
278 if (addr_len < SIN6_LEN_RFC2133)
279 return -EINVAL;
280
281 if (addr->sin6_family != AF_INET6)
282 return -EAFNOSUPPORT;
283
284 addr_type = ipv6_addr_type(&addr->sin6_addr);
285 if ((addr_type & IPV6_ADDR_MULTICAST) && sock->type == SOCK_STREAM)
286 return -EINVAL;
287
288 snum = ntohs(addr->sin6_port);
289 if (snum && snum < PROT_SOCK && !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE))
290 return -EACCES;
291
292 lock_sock(sk);
293
294
295 if (sk->sk_state != TCP_CLOSE || inet->inet_num) {
296 err = -EINVAL;
297 goto out;
298 }
299
300
301 if (addr_type == IPV6_ADDR_MAPPED) {
302 int chk_addr_ret;
303
304
305
306
307 if (np->ipv6only) {
308 err = -EINVAL;
309 goto out;
310 }
311
312
313 v4addr = addr->sin6_addr.s6_addr32[3];
314 chk_addr_ret = inet_addr_type(net, v4addr);
315 if (!net->ipv4_sysctl_ip_nonlocal_bind &&
316 !(inet->freebind || inet->transparent) &&
317 v4addr != htonl(INADDR_ANY) &&
318 chk_addr_ret != RTN_LOCAL &&
319 chk_addr_ret != RTN_MULTICAST &&
320 chk_addr_ret != RTN_BROADCAST) {
321 err = -EADDRNOTAVAIL;
322 goto out;
323 }
324 } else {
325 if (addr_type != IPV6_ADDR_ANY) {
326 struct net_device *dev = NULL;
327
328 rcu_read_lock();
329 if (__ipv6_addr_needs_scope_id(addr_type)) {
330 if (addr_len >= sizeof(struct sockaddr_in6) &&
331 addr->sin6_scope_id) {
332
333
334
335 sk->sk_bound_dev_if = addr->sin6_scope_id;
336 }
337
338
339 if (!sk->sk_bound_dev_if) {
340 err = -EINVAL;
341 goto out_unlock;
342 }
343 dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if);
344 if (!dev) {
345 err = -ENODEV;
346 goto out_unlock;
347 }
348 }
349
350
351
352
353 v4addr = LOOPBACK4_IPV6;
354 if (!(addr_type & IPV6_ADDR_MULTICAST)) {
355 if (!net->ipv6_sysctl_ip_nonlocal_bind &&
356 !(inet->freebind || inet->transparent) &&
357 !ipv6_chk_addr(net, &addr->sin6_addr,
358 dev, 0)) {
359 err = -EADDRNOTAVAIL;
360 goto out_unlock;
361 }
362 }
363 rcu_read_unlock();
364 }
365 }
366
367 inet->inet_rcv_saddr = v4addr;
368 inet->inet_saddr = v4addr;
369
370 sk->sk_v6_rcv_saddr = addr->sin6_addr;
371
372 if (!(addr_type & IPV6_ADDR_MULTICAST))
373 np->saddr = addr->sin6_addr;
374
375
376 if ((snum || !inet->bind_address_no_port) &&
377 sk->sk_prot->get_port(sk, snum)) {
378 inet_reset_saddr(sk);
379 err = -EADDRINUSE;
380 goto out;
381 }
382
383 if (addr_type != IPV6_ADDR_ANY) {
384 sk->sk_userlocks |= SOCK_BINDADDR_LOCK;
385 if (addr_type != IPV6_ADDR_MAPPED)
386 np->ipv6only = 1;
387 }
388 if (snum)
389 sk->sk_userlocks |= SOCK_BINDPORT_LOCK;
390 inet->inet_sport = htons(inet->inet_num);
391 inet->inet_dport = 0;
392 inet->inet_daddr = 0;
393out:
394 release_sock(sk);
395 return err;
396out_unlock:
397 rcu_read_unlock();
398 goto out;
399}
400EXPORT_SYMBOL(inet6_bind);
401
402int inet6_release(struct socket *sock)
403{
404 struct sock *sk = sock->sk;
405
406 if (sk == NULL)
407 return -EINVAL;
408
409
410 ipv6_sock_mc_close(sk);
411
412
413 ipv6_sock_ac_close(sk);
414
415 return inet_release(sock);
416}
417EXPORT_SYMBOL(inet6_release);
418
419void inet6_destroy_sock(struct sock *sk)
420{
421 struct ipv6_pinfo *np = inet6_sk(sk);
422 struct sk_buff *skb;
423 struct ipv6_txoptions *opt;
424
425
426
427 skb = xchg(&np->pktoptions, NULL);
428 if (skb != NULL)
429 kfree_skb(skb);
430
431 skb = xchg(&np->rxpmtu, NULL);
432 if (skb != NULL)
433 kfree_skb(skb);
434
435
436 fl6_free_socklist(sk);
437
438
439
440 opt = xchg((__force struct ipv6_txoptions **)&np->opt, NULL);
441 if (opt) {
442 atomic_sub(opt->tot_len, &sk->sk_omem_alloc);
443 txopt_put(opt);
444 }
445}
446EXPORT_SYMBOL_GPL(inet6_destroy_sock);
447
448
449
450
451
452int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
453 int *uaddr_len, int peer)
454{
455 struct sockaddr_in6 *sin = (struct sockaddr_in6 *)uaddr;
456 struct sock *sk = sock->sk;
457 struct inet_sock *inet = inet_sk(sk);
458 struct ipv6_pinfo *np = inet6_sk(sk);
459
460 sin->sin6_family = AF_INET6;
461 sin->sin6_flowinfo = 0;
462 sin->sin6_scope_id = 0;
463 if (peer) {
464 if (!inet->inet_dport)
465 return -ENOTCONN;
466 if (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) &&
467 peer == 1)
468 return -ENOTCONN;
469 sin->sin6_port = inet->inet_dport;
470 sin->sin6_addr = sk->sk_v6_daddr;
471 if (np->sndflow)
472 sin->sin6_flowinfo = np->flow_label;
473 } else {
474 if (ipv6_addr_any(&sk->sk_v6_rcv_saddr))
475 sin->sin6_addr = np->saddr;
476 else
477 sin->sin6_addr = sk->sk_v6_rcv_saddr;
478
479 sin->sin6_port = inet->inet_sport;
480 }
481 sin->sin6_scope_id = ipv6_iface_scope_id(&sin->sin6_addr,
482 sk->sk_bound_dev_if);
483 *uaddr_len = sizeof(*sin);
484 return 0;
485}
486EXPORT_SYMBOL(inet6_getname);
487
488int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
489{
490 struct sock *sk = sock->sk;
491 struct net *net = sock_net(sk);
492
493 switch (cmd) {
494 case SIOCGSTAMP:
495 return sock_get_timestamp(sk, (struct timeval __user *)arg);
496
497 case SIOCGSTAMPNS:
498 return sock_get_timestampns(sk, (struct timespec __user *)arg);
499
500 case SIOCADDRT:
501 case SIOCDELRT:
502
503 return ipv6_route_ioctl(net, cmd, (void __user *)arg);
504
505 case SIOCSIFADDR:
506 return addrconf_add_ifaddr(net, (void __user *) arg);
507 case SIOCDIFADDR:
508 return addrconf_del_ifaddr(net, (void __user *) arg);
509 case SIOCSIFDSTADDR:
510 return addrconf_set_dstaddr(net, (void __user *) arg);
511 default:
512 if (!sk->sk_prot->ioctl)
513 return -ENOIOCTLCMD;
514 return sk->sk_prot->ioctl(sk, cmd, arg);
515 }
516
517 return 0;
518}
519EXPORT_SYMBOL(inet6_ioctl);
520
521const struct proto_ops inet6_stream_ops = {
522 .family = PF_INET6,
523 .owner = THIS_MODULE,
524 .release = inet6_release,
525 .bind = inet6_bind,
526 .connect = inet_stream_connect,
527 .socketpair = sock_no_socketpair,
528 .accept = inet_accept,
529 .getname = inet6_getname,
530 .poll = tcp_poll,
531 .ioctl = inet6_ioctl,
532 .listen = inet_listen,
533 .shutdown = inet_shutdown,
534 .setsockopt = sock_common_setsockopt,
535 .getsockopt = sock_common_getsockopt,
536 .sendmsg = inet_sendmsg,
537 .recvmsg = inet_recvmsg,
538 .mmap = sock_no_mmap,
539 .sendpage = inet_sendpage,
540 .splice_read = tcp_splice_read,
541#ifdef CONFIG_COMPAT
542 .compat_setsockopt = compat_sock_common_setsockopt,
543 .compat_getsockopt = compat_sock_common_getsockopt,
544#endif
545};
546
547const struct proto_ops inet6_dgram_ops = {
548 .family = PF_INET6,
549 .owner = THIS_MODULE,
550 .release = inet6_release,
551 .bind = inet6_bind,
552 .connect = inet_dgram_connect,
553 .socketpair = sock_no_socketpair,
554 .accept = sock_no_accept,
555 .getname = inet6_getname,
556 .poll = udp_poll,
557 .ioctl = inet6_ioctl,
558 .listen = sock_no_listen,
559 .shutdown = inet_shutdown,
560 .setsockopt = sock_common_setsockopt,
561 .getsockopt = sock_common_getsockopt,
562 .sendmsg = inet_sendmsg,
563 .recvmsg = inet_recvmsg,
564 .mmap = sock_no_mmap,
565 .sendpage = sock_no_sendpage,
566#ifdef CONFIG_COMPAT
567 .compat_setsockopt = compat_sock_common_setsockopt,
568 .compat_getsockopt = compat_sock_common_getsockopt,
569#endif
570};
571
572static const struct net_proto_family inet6_family_ops = {
573 .family = PF_INET6,
574 .create = inet6_create,
575 .owner = THIS_MODULE,
576};
577
578int inet6_register_protosw(struct inet_protosw *p)
579{
580 struct list_head *lh;
581 struct inet_protosw *answer;
582 struct list_head *last_perm;
583 int protocol = p->protocol;
584 int ret;
585
586 spin_lock_bh(&inetsw6_lock);
587
588 ret = -EINVAL;
589 if (p->type >= SOCK_MAX)
590 goto out_illegal;
591
592
593 answer = NULL;
594 ret = -EPERM;
595 last_perm = &inetsw6[p->type];
596 list_for_each(lh, &inetsw6[p->type]) {
597 answer = list_entry(lh, struct inet_protosw, list);
598
599
600 if (INET_PROTOSW_PERMANENT & answer->flags) {
601 if (protocol == answer->protocol)
602 break;
603 last_perm = lh;
604 }
605
606 answer = NULL;
607 }
608 if (answer)
609 goto out_permanent;
610
611
612
613
614
615
616
617 list_add_rcu(&p->list, last_perm);
618 ret = 0;
619out:
620 spin_unlock_bh(&inetsw6_lock);
621 return ret;
622
623out_permanent:
624 pr_err("Attempt to override permanent protocol %d\n", protocol);
625 goto out;
626
627out_illegal:
628 pr_err("Ignoring attempt to register invalid socket type %d\n",
629 p->type);
630 goto out;
631}
632EXPORT_SYMBOL(inet6_register_protosw);
633
634void
635inet6_unregister_protosw(struct inet_protosw *p)
636{
637 if (INET_PROTOSW_PERMANENT & p->flags) {
638 pr_err("Attempt to unregister permanent protocol %d\n",
639 p->protocol);
640 } else {
641 spin_lock_bh(&inetsw6_lock);
642 list_del_rcu(&p->list);
643 spin_unlock_bh(&inetsw6_lock);
644
645 synchronize_net();
646 }
647}
648EXPORT_SYMBOL(inet6_unregister_protosw);
649
650int inet6_sk_rebuild_header(struct sock *sk)
651{
652 struct ipv6_pinfo *np = inet6_sk(sk);
653 struct dst_entry *dst;
654
655 dst = __sk_dst_check(sk, np->dst_cookie);
656
657 if (dst == NULL) {
658 struct inet_sock *inet = inet_sk(sk);
659 struct in6_addr *final_p, final;
660 struct flowi6 fl6;
661
662 memset(&fl6, 0, sizeof(fl6));
663 fl6.flowi6_proto = sk->sk_protocol;
664 fl6.daddr = sk->sk_v6_daddr;
665 fl6.saddr = np->saddr;
666 fl6.flowlabel = np->flow_label;
667 fl6.flowi6_oif = sk->sk_bound_dev_if;
668 fl6.flowi6_mark = sk->sk_mark;
669 fl6.fl6_dport = inet->inet_dport;
670 fl6.fl6_sport = inet->inet_sport;
671 security_sk_classify_flow(sk, flowi6_to_flowi(&fl6));
672
673 rcu_read_lock();
674 final_p = fl6_update_dst(&fl6, rcu_dereference(np->opt),
675 &final);
676 rcu_read_unlock();
677
678 dst = ip6_dst_lookup_flow(sk, &fl6, final_p);
679 if (IS_ERR(dst)) {
680 sk->sk_route_caps = 0;
681 sk->sk_err_soft = -PTR_ERR(dst);
682 return PTR_ERR(dst);
683 }
684
685 ip6_dst_store(sk, dst, NULL, NULL);
686 }
687
688 return 0;
689}
690EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header);
691
692bool ipv6_opt_accepted(const struct sock *sk, const struct sk_buff *skb)
693{
694 const struct ipv6_pinfo *np = inet6_sk(sk);
695 const struct inet6_skb_parm *opt = IP6CB(skb);
696
697 if (np->rxopt.all) {
698 if ((opt->hop && (np->rxopt.bits.hopopts ||
699 np->rxopt.bits.ohopopts)) ||
700 ((IPV6_FLOWINFO_MASK &
701 *(__be32 *)skb_network_header(skb)) &&
702 np->rxopt.bits.rxflow) ||
703 (opt->srcrt && (np->rxopt.bits.srcrt ||
704 np->rxopt.bits.osrcrt)) ||
705 ((opt->dst1 || opt->dst0) &&
706 (np->rxopt.bits.dstopts || np->rxopt.bits.odstopts)))
707 return true;
708 }
709 return false;
710}
711EXPORT_SYMBOL_GPL(ipv6_opt_accepted);
712
713static struct packet_type ipv6_packet_type __read_mostly = {
714 .type = cpu_to_be16(ETH_P_IPV6),
715 .func = ipv6_rcv,
716};
717
718static int __init ipv6_packet_init(void)
719{
720 dev_add_pack(&ipv6_packet_type);
721 return 0;
722}
723
724static void ipv6_packet_cleanup(void)
725{
726 dev_remove_pack(&ipv6_packet_type);
727}
728
729static int __net_init ipv6_init_mibs(struct net *net)
730{
731 if (snmp_mib_init((void __percpu **)net->mib.udp_stats_in6,
732 sizeof(struct udp_mib),
733 __alignof__(struct udp_mib)) < 0)
734 return -ENOMEM;
735 if (snmp_mib_init((void __percpu **)net->mib.udplite_stats_in6,
736 sizeof(struct udp_mib),
737 __alignof__(struct udp_mib)) < 0)
738 goto err_udplite_mib;
739 if (snmp_mib_init((void __percpu **)net->mib.ipv6_statistics,
740 sizeof(struct ipstats_mib),
741 __alignof__(struct ipstats_mib)) < 0)
742 goto err_ip_mib;
743 if (snmp_mib_init((void __percpu **)net->mib.icmpv6_statistics,
744 sizeof(struct icmpv6_mib),
745 __alignof__(struct icmpv6_mib)) < 0)
746 goto err_icmp_mib;
747 net->mib.icmpv6msg_statistics = kzalloc(sizeof(struct icmpv6msg_mib),
748 GFP_KERNEL);
749 if (!net->mib.icmpv6msg_statistics)
750 goto err_icmpmsg_mib;
751 return 0;
752
753err_icmpmsg_mib:
754 snmp_mib_free((void __percpu **)net->mib.icmpv6_statistics);
755err_icmp_mib:
756 snmp_mib_free((void __percpu **)net->mib.ipv6_statistics);
757err_ip_mib:
758 snmp_mib_free((void __percpu **)net->mib.udplite_stats_in6);
759err_udplite_mib:
760 snmp_mib_free((void __percpu **)net->mib.udp_stats_in6);
761 return -ENOMEM;
762}
763
764static void ipv6_cleanup_mibs(struct net *net)
765{
766 snmp_mib_free((void __percpu **)net->mib.udp_stats_in6);
767 snmp_mib_free((void __percpu **)net->mib.udplite_stats_in6);
768 snmp_mib_free((void __percpu **)net->mib.ipv6_statistics);
769 snmp_mib_free((void __percpu **)net->mib.icmpv6_statistics);
770 kfree(net->mib.icmpv6msg_statistics);
771}
772
773static int __net_init inet6_net_init(struct net *net)
774{
775 int err = 0;
776
777 net->ipv6.sysctl.bindv6only = 0;
778 net->ipv6.sysctl.icmpv6_time = 1*HZ;
779 net->idgen_retries = 3;
780 net->idgen_delay = 1 * HZ;
781
782 err = ipv6_init_mibs(net);
783 if (err)
784 return err;
785#ifdef CONFIG_PROC_FS
786 err = udp6_proc_init(net);
787 if (err)
788 goto out;
789 err = tcp6_proc_init(net);
790 if (err)
791 goto proc_tcp6_fail;
792 err = ac6_proc_init(net);
793 if (err)
794 goto proc_ac6_fail;
795#endif
796 return err;
797
798#ifdef CONFIG_PROC_FS
799proc_ac6_fail:
800 tcp6_proc_exit(net);
801proc_tcp6_fail:
802 udp6_proc_exit(net);
803out:
804 ipv6_cleanup_mibs(net);
805 return err;
806#endif
807}
808
809static void __net_exit inet6_net_exit(struct net *net)
810{
811#ifdef CONFIG_PROC_FS
812 udp6_proc_exit(net);
813 tcp6_proc_exit(net);
814 ac6_proc_exit(net);
815#endif
816 ipv6_cleanup_mibs(net);
817}
818
819static struct pernet_operations inet6_net_ops = {
820 .init = inet6_net_init,
821 .exit = inet6_net_exit,
822};
823
824static const struct ipv6_stub ipv6_stub_impl = {
825 .ipv6_sock_mc_join = ipv6_sock_mc_join,
826 .ipv6_sock_mc_drop = ipv6_sock_mc_drop,
827 .ipv6_dst_lookup = ip6_dst_lookup,
828 .udpv6_encap_enable = udpv6_encap_enable,
829 .ndisc_send_na = ndisc_send_na,
830 .nd_tbl = &nd_tbl,
831};
832
833static int __init inet6_init(void)
834{
835 struct list_head *r;
836 int err = 0;
837
838 BUILD_BUG_ON(sizeof(struct inet6_skb_parm) > FIELD_SIZEOF(struct sk_buff, cb));
839
840
841 for (r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r)
842 INIT_LIST_HEAD(r);
843
844 if (disable_ipv6_mod) {
845 pr_info("Loaded, but administratively disabled, reboot required to enable\n");
846 goto out;
847 }
848
849 err = proto_register(&tcpv6_prot, 1);
850 if (err)
851 goto out;
852
853 err = proto_register(&udpv6_prot, 1);
854 if (err)
855 goto out_unregister_tcp_proto;
856
857 err = proto_register(&udplitev6_prot, 1);
858 if (err)
859 goto out_unregister_udp_proto;
860
861 err = proto_register(&rawv6_prot, 1);
862 if (err)
863 goto out_unregister_udplite_proto;
864
865
866
867
868
869 err = rawv6_init();
870 if (err)
871 goto out_unregister_raw_proto;
872
873
874
875
876 err = sock_register(&inet6_family_ops);
877 if (err)
878 goto out_sock_register_fail;
879
880 tcpv6_prot.sysctl_mem = init_net.ipv4.sysctl_tcp_mem;
881
882
883
884
885
886
887
888
889 err = register_pernet_subsys(&inet6_net_ops);
890 if (err)
891 goto register_pernet_fail;
892 err = icmpv6_init();
893 if (err)
894 goto icmp_fail;
895 err = ip6_mr_init();
896 if (err)
897 goto ipmr_fail;
898 err = ndisc_init();
899 if (err)
900 goto ndisc_fail;
901 err = igmp6_init();
902 if (err)
903 goto igmp_fail;
904
905 ipv6_stub = &ipv6_stub_impl;
906
907 err = ipv6_netfilter_init();
908 if (err)
909 goto netfilter_fail;
910
911#ifdef CONFIG_PROC_FS
912 err = -ENOMEM;
913 if (raw6_proc_init())
914 goto proc_raw6_fail;
915 if (udplite6_proc_init())
916 goto proc_udplite6_fail;
917 if (ipv6_misc_proc_init())
918 goto proc_misc6_fail;
919 if (if6_proc_init())
920 goto proc_if6_fail;
921#endif
922 err = ip6_route_init();
923 if (err)
924 goto ip6_route_fail;
925 err = ndisc_late_init();
926 if (err)
927 goto ndisc_late_fail;
928 err = ip6_flowlabel_init();
929 if (err)
930 goto ip6_flowlabel_fail;
931 err = addrconf_init();
932 if (err)
933 goto addrconf_fail;
934
935
936 err = ipv6_exthdrs_init();
937 if (err)
938 goto ipv6_exthdrs_fail;
939
940 err = ipv6_frag_init();
941 if (err)
942 goto ipv6_frag_fail;
943
944
945 err = udpv6_init();
946 if (err)
947 goto udpv6_fail;
948
949 err = udplitev6_init();
950 if (err)
951 goto udplitev6_fail;
952
953 err = udpv6_offload_init();
954 if (err)
955 goto udpv6_offload_fail;
956
957 err = tcpv6_init();
958 if (err)
959 goto tcpv6_fail;
960
961 err = ipv6_packet_init();
962 if (err)
963 goto ipv6_packet_fail;
964
965#ifdef CONFIG_SYSCTL
966 err = ipv6_sysctl_register();
967 if (err)
968 goto sysctl_fail;
969#endif
970out:
971 return err;
972
973#ifdef CONFIG_SYSCTL
974sysctl_fail:
975 ipv6_packet_cleanup();
976#endif
977ipv6_packet_fail:
978 tcpv6_exit();
979tcpv6_fail:
980 udpv6_offload_exit();
981udpv6_offload_fail:
982 udplitev6_exit();
983udplitev6_fail:
984 udpv6_exit();
985udpv6_fail:
986 ipv6_frag_exit();
987ipv6_frag_fail:
988 ipv6_exthdrs_exit();
989ipv6_exthdrs_fail:
990 addrconf_cleanup();
991addrconf_fail:
992 ip6_flowlabel_cleanup();
993ip6_flowlabel_fail:
994 ndisc_late_cleanup();
995ndisc_late_fail:
996 ip6_route_cleanup();
997ip6_route_fail:
998#ifdef CONFIG_PROC_FS
999 if6_proc_exit();
1000proc_if6_fail:
1001 ipv6_misc_proc_exit();
1002proc_misc6_fail:
1003 udplite6_proc_exit();
1004proc_udplite6_fail:
1005 raw6_proc_exit();
1006proc_raw6_fail:
1007#endif
1008 ipv6_netfilter_fini();
1009netfilter_fail:
1010 igmp6_cleanup();
1011igmp_fail:
1012 ndisc_cleanup();
1013ndisc_fail:
1014 ip6_mr_cleanup();
1015ipmr_fail:
1016 icmpv6_cleanup();
1017icmp_fail:
1018 unregister_pernet_subsys(&inet6_net_ops);
1019register_pernet_fail:
1020 sock_unregister(PF_INET6);
1021 rtnl_unregister_all(PF_INET6);
1022out_sock_register_fail:
1023 rawv6_exit();
1024out_unregister_raw_proto:
1025 proto_unregister(&rawv6_prot);
1026out_unregister_udplite_proto:
1027 proto_unregister(&udplitev6_prot);
1028out_unregister_udp_proto:
1029 proto_unregister(&udpv6_prot);
1030out_unregister_tcp_proto:
1031 proto_unregister(&tcpv6_prot);
1032 goto out;
1033}
1034module_init(inet6_init);
1035
1036static void __exit inet6_exit(void)
1037{
1038 if (disable_ipv6_mod)
1039 return;
1040
1041
1042 sock_unregister(PF_INET6);
1043
1044 rtnl_unregister_all(PF_INET6);
1045
1046 udpv6_exit();
1047 udplitev6_exit();
1048 tcpv6_exit();
1049
1050
1051 ipv6_packet_cleanup();
1052 ipv6_frag_exit();
1053 ipv6_exthdrs_exit();
1054 addrconf_cleanup();
1055 ip6_flowlabel_cleanup();
1056 ndisc_late_cleanup();
1057 ip6_route_cleanup();
1058#ifdef CONFIG_PROC_FS
1059
1060
1061 if6_proc_exit();
1062 ipv6_misc_proc_exit();
1063 udplite6_proc_exit();
1064 raw6_proc_exit();
1065#endif
1066 ipv6_netfilter_fini();
1067 ipv6_stub = NULL;
1068 igmp6_cleanup();
1069 ndisc_cleanup();
1070 ip6_mr_cleanup();
1071 icmpv6_cleanup();
1072 rawv6_exit();
1073
1074 unregister_pernet_subsys(&inet6_net_ops);
1075 proto_unregister(&rawv6_prot);
1076 proto_unregister(&udplitev6_prot);
1077 proto_unregister(&udpv6_prot);
1078 proto_unregister(&tcpv6_prot);
1079
1080 rcu_barrier();
1081}
1082module_exit(inet6_exit);
1083
1084MODULE_ALIAS_NETPROTO(PF_INET6);
1085
