2 * PF_INET6 socket protocol family
3 * Linux INET6 implementation
6 * Pedro Roque <roque@di.fc.ul.pt>
8 * Adapted from linux/net/ipv4/af_inet.c
11 * piggy, Karl Knutson : Socket protocol table
12 * Hideaki YOSHIFUJI : sin6_scope_id support
13 * Arnaldo Melo : check proc_net_create return, cleanups
15 * This program is free software; you can redistribute it and/or
16 * modify it under the terms of the GNU General Public License
17 * as published by the Free Software Foundation; either version
18 * 2 of the License, or (at your option) any later version.
21 #define pr_fmt(fmt) "IPv6: " fmt
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>
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>
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>
42 #include <linux/inet.h>
43 #include <linux/netdevice.h>
44 #include <linux/icmpv6.h>
45 #include <linux/netfilter_ipv6.h>
50 #include <net/udplite.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 #ifdef CONFIG_IPV6_TUNNEL
60 #include <net/ip6_tunnel.h>
63 #include <asm/uaccess.h>
64 #include <linux/mroute6.h>
66 #ifdef CONFIG_ANDROID_PARANOID_NETWORK
67 #include <linux/android_aid.h>
69 static inline int current_has_network(void)
71 return in_egroup_p(AID_INET) || capable(CAP_NET_RAW);
74 static inline int current_has_network(void)
80 MODULE_AUTHOR("Cast of dozens");
81 MODULE_DESCRIPTION("IPv6 protocol stack for Linux");
82 MODULE_LICENSE("GPL");
84 /* The inetsw6 table contains everything that inet6_create needs to
87 static struct list_head inetsw6[SOCK_MAX];
88 static DEFINE_SPINLOCK(inetsw6_lock);
90 struct ipv6_params ipv6_defaults = {
95 static int disable_ipv6_mod;
97 module_param_named(disable, disable_ipv6_mod, int, 0444);
98 MODULE_PARM_DESC(disable, "Disable IPv6 module such that it is non-functional");
100 module_param_named(disable_ipv6, ipv6_defaults.disable_ipv6, int, 0444);
101 MODULE_PARM_DESC(disable_ipv6, "Disable IPv6 on all interfaces");
103 module_param_named(autoconf, ipv6_defaults.autoconf, int, 0444);
104 MODULE_PARM_DESC(autoconf, "Enable IPv6 address autoconfiguration on all interfaces");
106 static __inline__ struct ipv6_pinfo *inet6_sk_generic(struct sock *sk)
108 const int offset = sk->sk_prot->obj_size - sizeof(struct ipv6_pinfo);
110 return (struct ipv6_pinfo *)(((u8 *)sk) + offset);
113 static int inet6_create(struct net *net, struct socket *sock, int protocol,
116 struct inet_sock *inet;
117 struct ipv6_pinfo *np;
119 struct inet_protosw *answer;
120 struct proto *answer_prot;
121 unsigned char answer_flags;
122 char answer_no_check;
123 int try_loading_module = 0;
126 if (!current_has_network())
129 if (sock->type != SOCK_RAW &&
130 sock->type != SOCK_DGRAM &&
132 build_ehash_secret();
134 /* Look for the requested type/protocol pair. */
136 err = -ESOCKTNOSUPPORT;
138 list_for_each_entry_rcu(answer, &inetsw6[sock->type], list) {
141 /* Check the non-wild match. */
142 if (protocol == answer->protocol) {
143 if (protocol != IPPROTO_IP)
146 /* Check for the two wild cases. */
147 if (IPPROTO_IP == protocol) {
148 protocol = answer->protocol;
151 if (IPPROTO_IP == answer->protocol)
154 err = -EPROTONOSUPPORT;
158 if (try_loading_module < 2) {
161 * Be more specific, e.g. net-pf-10-proto-132-type-1
162 * (net-pf-PF_INET6-proto-IPPROTO_SCTP-type-SOCK_STREAM)
164 if (++try_loading_module == 1)
165 request_module("net-pf-%d-proto-%d-type-%d",
166 PF_INET6, protocol, sock->type);
168 * Fall back to generic, e.g. net-pf-10-proto-132
169 * (net-pf-PF_INET6-proto-IPPROTO_SCTP)
172 request_module("net-pf-%d-proto-%d",
174 goto lookup_protocol;
180 if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW))
183 sock->ops = answer->ops;
184 answer_prot = answer->prot;
185 answer_no_check = answer->no_check;
186 answer_flags = answer->flags;
189 WARN_ON(answer_prot->slab == NULL);
192 sk = sk_alloc(net, PF_INET6, GFP_KERNEL, answer_prot);
196 sock_init_data(sock, sk);
199 sk->sk_no_check = answer_no_check;
200 if (INET_PROTOSW_REUSE & answer_flags)
201 sk->sk_reuse = SK_CAN_REUSE;
204 inet->is_icsk = (INET_PROTOSW_ICSK & answer_flags) != 0;
206 if (SOCK_RAW == sock->type) {
207 inet->inet_num = protocol;
208 if (IPPROTO_RAW == protocol)
212 sk->sk_destruct = inet_sock_destruct;
213 sk->sk_family = PF_INET6;
214 sk->sk_protocol = protocol;
216 sk->sk_backlog_rcv = answer->prot->backlog_rcv;
218 inet_sk(sk)->pinet6 = np = inet6_sk_generic(sk);
220 np->mcast_hops = IPV6_DEFAULT_MCASTHOPS;
222 np->pmtudisc = IPV6_PMTUDISC_WANT;
223 np->ipv6only = net->ipv6.sysctl.bindv6only;
225 /* Init the ipv4 part of the socket since we can have sockets
226 * using v6 API for ipv4.
233 inet->mc_list = NULL;
236 if (ipv4_config.no_pmtu_disc)
237 inet->pmtudisc = IP_PMTUDISC_DONT;
239 inet->pmtudisc = IP_PMTUDISC_WANT;
241 * Increment only the relevant sk_prot->socks debug field, this changes
242 * the previous behaviour of incrementing both the equivalent to
243 * answer->prot->socks (inet6_sock_nr) and inet_sock_nr.
245 * This allows better debug granularity as we'll know exactly how many
246 * UDPv6, TCPv6, etc socks were allocated, not the sum of all IPv6
247 * transport protocol socks. -acme
249 sk_refcnt_debug_inc(sk);
251 if (inet->inet_num) {
252 /* It assumes that any protocol which allows
253 * the user to assign a number at socket
254 * creation time automatically shares.
256 inet->inet_sport = htons(inet->inet_num);
257 sk->sk_prot->hash(sk);
259 if (sk->sk_prot->init) {
260 err = sk->sk_prot->init(sk);
262 sk_common_release(sk);
274 /* bind for INET6 API */
275 int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
277 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)uaddr;
278 struct sock *sk = sock->sk;
279 struct inet_sock *inet = inet_sk(sk);
280 struct ipv6_pinfo *np = inet6_sk(sk);
281 struct net *net = sock_net(sk);
287 /* If the socket has its own bind function then use it. */
288 if (sk->sk_prot->bind)
289 return sk->sk_prot->bind(sk, uaddr, addr_len);
291 if (addr_len < SIN6_LEN_RFC2133)
294 if (addr->sin6_family != AF_INET6)
295 return -EAFNOSUPPORT;
297 addr_type = ipv6_addr_type(&addr->sin6_addr);
298 if ((addr_type & IPV6_ADDR_MULTICAST) && sock->type == SOCK_STREAM)
301 snum = ntohs(addr->sin6_port);
302 if (snum && snum < PROT_SOCK && !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE))
307 /* Check these errors (active socket, double bind). */
308 if (sk->sk_state != TCP_CLOSE || inet->inet_num) {
313 /* Check if the address belongs to the host. */
314 if (addr_type == IPV6_ADDR_MAPPED) {
317 /* Binding to v4-mapped address on a v6-only socket
325 /* Reproduce AF_INET checks to make the bindings consistent */
326 v4addr = addr->sin6_addr.s6_addr32[3];
327 chk_addr_ret = inet_addr_type(net, v4addr);
328 if (!sysctl_ip_nonlocal_bind &&
329 !(inet->freebind || inet->transparent) &&
330 v4addr != htonl(INADDR_ANY) &&
331 chk_addr_ret != RTN_LOCAL &&
332 chk_addr_ret != RTN_MULTICAST &&
333 chk_addr_ret != RTN_BROADCAST) {
334 err = -EADDRNOTAVAIL;
338 if (addr_type != IPV6_ADDR_ANY) {
339 struct net_device *dev = NULL;
342 if (__ipv6_addr_needs_scope_id(addr_type)) {
343 if (addr_len >= sizeof(struct sockaddr_in6) &&
344 addr->sin6_scope_id) {
345 /* Override any existing binding, if another one
346 * is supplied by user.
348 sk->sk_bound_dev_if = addr->sin6_scope_id;
351 /* Binding to link-local address requires an interface */
352 if (!sk->sk_bound_dev_if) {
356 dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if);
363 /* ipv4 addr of the socket is invalid. Only the
364 * unspecified and mapped address have a v4 equivalent.
366 v4addr = LOOPBACK4_IPV6;
367 if (!(addr_type & IPV6_ADDR_MULTICAST)) {
368 if (!(inet->freebind || inet->transparent) &&
369 !ipv6_chk_addr(net, &addr->sin6_addr,
371 err = -EADDRNOTAVAIL;
379 inet->inet_rcv_saddr = v4addr;
380 inet->inet_saddr = v4addr;
382 np->rcv_saddr = addr->sin6_addr;
384 if (!(addr_type & IPV6_ADDR_MULTICAST))
385 np->saddr = addr->sin6_addr;
387 /* Make sure we are allowed to bind here. */
388 if (sk->sk_prot->get_port(sk, snum)) {
389 inet_reset_saddr(sk);
394 if (addr_type != IPV6_ADDR_ANY) {
395 sk->sk_userlocks |= SOCK_BINDADDR_LOCK;
396 if (addr_type != IPV6_ADDR_MAPPED)
400 sk->sk_userlocks |= SOCK_BINDPORT_LOCK;
401 inet->inet_sport = htons(inet->inet_num);
402 inet->inet_dport = 0;
403 inet->inet_daddr = 0;
411 EXPORT_SYMBOL(inet6_bind);
413 int inet6_release(struct socket *sock)
415 struct sock *sk = sock->sk;
421 ipv6_sock_mc_close(sk);
424 ipv6_sock_ac_close(sk);
426 return inet_release(sock);
428 EXPORT_SYMBOL(inet6_release);
430 void inet6_destroy_sock(struct sock *sk)
432 struct ipv6_pinfo *np = inet6_sk(sk);
434 struct ipv6_txoptions *opt;
436 /* Release rx options */
438 skb = xchg(&np->pktoptions, NULL);
442 skb = xchg(&np->rxpmtu, NULL);
446 /* Free flowlabels */
447 fl6_free_socklist(sk);
449 /* Free tx options */
451 opt = xchg(&np->opt, NULL);
453 sock_kfree_s(sk, opt, opt->tot_len);
455 EXPORT_SYMBOL_GPL(inet6_destroy_sock);
458 * This does both peername and sockname.
461 int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
462 int *uaddr_len, int peer)
464 struct sockaddr_in6 *sin = (struct sockaddr_in6 *)uaddr;
465 struct sock *sk = sock->sk;
466 struct inet_sock *inet = inet_sk(sk);
467 struct ipv6_pinfo *np = inet6_sk(sk);
469 sin->sin6_family = AF_INET6;
470 sin->sin6_flowinfo = 0;
471 sin->sin6_scope_id = 0;
473 if (!inet->inet_dport)
475 if (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) &&
478 sin->sin6_port = inet->inet_dport;
479 sin->sin6_addr = np->daddr;
481 sin->sin6_flowinfo = np->flow_label;
483 if (ipv6_addr_any(&np->rcv_saddr))
484 sin->sin6_addr = np->saddr;
486 sin->sin6_addr = np->rcv_saddr;
488 sin->sin6_port = inet->inet_sport;
490 sin->sin6_scope_id = ipv6_iface_scope_id(&sin->sin6_addr,
491 sk->sk_bound_dev_if);
492 *uaddr_len = sizeof(*sin);
495 EXPORT_SYMBOL(inet6_getname);
497 int inet6_killaddr_ioctl(struct net *net, void __user *arg) {
498 struct in6_ifreq ireq;
499 struct sockaddr_in6 sin6;
501 if (!capable(CAP_NET_ADMIN))
504 if (copy_from_user(&ireq, arg, sizeof(struct in6_ifreq)))
507 sin6.sin6_family = AF_INET6;
508 sin6.sin6_addr = ireq.ifr6_addr;
509 return tcp_nuke_addr(net, (struct sockaddr *) &sin6);
512 int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
514 struct sock *sk = sock->sk;
515 struct net *net = sock_net(sk);
519 return sock_get_timestamp(sk, (struct timeval __user *)arg);
522 return sock_get_timestampns(sk, (struct timespec __user *)arg);
527 return ipv6_route_ioctl(net, cmd, (void __user *)arg);
530 return addrconf_add_ifaddr(net, (void __user *) arg);
532 return addrconf_del_ifaddr(net, (void __user *) arg);
534 return addrconf_set_dstaddr(net, (void __user *) arg);
536 return inet6_killaddr_ioctl(net, (void __user *) arg);
538 if (!sk->sk_prot->ioctl)
540 return sk->sk_prot->ioctl(sk, cmd, arg);
545 EXPORT_SYMBOL(inet6_ioctl);
547 const struct proto_ops inet6_stream_ops = {
549 .owner = THIS_MODULE,
550 .release = inet6_release,
552 .connect = inet_stream_connect, /* ok */
553 .socketpair = sock_no_socketpair, /* a do nothing */
554 .accept = inet_accept, /* ok */
555 .getname = inet6_getname,
556 .poll = tcp_poll, /* ok */
557 .ioctl = inet6_ioctl, /* must change */
558 .listen = inet_listen, /* ok */
559 .shutdown = inet_shutdown, /* ok */
560 .setsockopt = sock_common_setsockopt, /* ok */
561 .getsockopt = sock_common_getsockopt, /* ok */
562 .sendmsg = inet_sendmsg, /* ok */
563 .recvmsg = inet_recvmsg, /* ok */
564 .mmap = sock_no_mmap,
565 .sendpage = inet_sendpage,
566 .splice_read = tcp_splice_read,
568 .compat_setsockopt = compat_sock_common_setsockopt,
569 .compat_getsockopt = compat_sock_common_getsockopt,
573 const struct proto_ops inet6_dgram_ops = {
575 .owner = THIS_MODULE,
576 .release = inet6_release,
578 .connect = inet_dgram_connect, /* ok */
579 .socketpair = sock_no_socketpair, /* a do nothing */
580 .accept = sock_no_accept, /* a do nothing */
581 .getname = inet6_getname,
582 .poll = udp_poll, /* ok */
583 .ioctl = inet6_ioctl, /* must change */
584 .listen = sock_no_listen, /* ok */
585 .shutdown = inet_shutdown, /* ok */
586 .setsockopt = sock_common_setsockopt, /* ok */
587 .getsockopt = sock_common_getsockopt, /* ok */
588 .sendmsg = inet_sendmsg, /* ok */
589 .recvmsg = inet_recvmsg, /* ok */
590 .mmap = sock_no_mmap,
591 .sendpage = sock_no_sendpage,
593 .compat_setsockopt = compat_sock_common_setsockopt,
594 .compat_getsockopt = compat_sock_common_getsockopt,
598 static const struct net_proto_family inet6_family_ops = {
600 .create = inet6_create,
601 .owner = THIS_MODULE,
604 int inet6_register_protosw(struct inet_protosw *p)
606 struct list_head *lh;
607 struct inet_protosw *answer;
608 struct list_head *last_perm;
609 int protocol = p->protocol;
612 spin_lock_bh(&inetsw6_lock);
615 if (p->type >= SOCK_MAX)
618 /* If we are trying to override a permanent protocol, bail. */
621 last_perm = &inetsw6[p->type];
622 list_for_each(lh, &inetsw6[p->type]) {
623 answer = list_entry(lh, struct inet_protosw, list);
625 /* Check only the non-wild match. */
626 if (INET_PROTOSW_PERMANENT & answer->flags) {
627 if (protocol == answer->protocol)
637 /* Add the new entry after the last permanent entry if any, so that
638 * the new entry does not override a permanent entry when matched with
639 * a wild-card protocol. But it is allowed to override any existing
640 * non-permanent entry. This means that when we remove this entry, the
641 * system automatically returns to the old behavior.
643 list_add_rcu(&p->list, last_perm);
646 spin_unlock_bh(&inetsw6_lock);
650 pr_err("Attempt to override permanent protocol %d\n", protocol);
654 pr_err("Ignoring attempt to register invalid socket type %d\n",
658 EXPORT_SYMBOL(inet6_register_protosw);
661 inet6_unregister_protosw(struct inet_protosw *p)
663 if (INET_PROTOSW_PERMANENT & p->flags) {
664 pr_err("Attempt to unregister permanent protocol %d\n",
667 spin_lock_bh(&inetsw6_lock);
668 list_del_rcu(&p->list);
669 spin_unlock_bh(&inetsw6_lock);
674 EXPORT_SYMBOL(inet6_unregister_protosw);
676 int inet6_sk_rebuild_header(struct sock *sk)
678 struct ipv6_pinfo *np = inet6_sk(sk);
679 struct dst_entry *dst;
681 dst = __sk_dst_check(sk, np->dst_cookie);
684 struct inet_sock *inet = inet_sk(sk);
685 struct in6_addr *final_p, final;
688 memset(&fl6, 0, sizeof(fl6));
689 fl6.flowi6_proto = sk->sk_protocol;
690 fl6.daddr = np->daddr;
691 fl6.saddr = np->saddr;
692 fl6.flowlabel = np->flow_label;
693 fl6.flowi6_oif = sk->sk_bound_dev_if;
694 fl6.flowi6_mark = sk->sk_mark;
695 fl6.fl6_dport = inet->inet_dport;
696 fl6.fl6_sport = inet->inet_sport;
697 fl6.flowi6_uid = sock_i_uid(sk);
698 security_sk_classify_flow(sk, flowi6_to_flowi(&fl6));
700 final_p = fl6_update_dst(&fl6, np->opt, &final);
702 dst = ip6_dst_lookup_flow(sk, &fl6, final_p, false);
704 sk->sk_route_caps = 0;
705 sk->sk_err_soft = -PTR_ERR(dst);
709 __ip6_dst_store(sk, dst, NULL, NULL);
714 EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header);
716 bool ipv6_opt_accepted(const struct sock *sk, const struct sk_buff *skb)
718 const struct ipv6_pinfo *np = inet6_sk(sk);
719 const struct inet6_skb_parm *opt = IP6CB(skb);
722 if ((opt->hop && (np->rxopt.bits.hopopts ||
723 np->rxopt.bits.ohopopts)) ||
724 ((IPV6_FLOWINFO_MASK &
725 *(__be32 *)skb_network_header(skb)) &&
726 np->rxopt.bits.rxflow) ||
727 (opt->srcrt && (np->rxopt.bits.srcrt ||
728 np->rxopt.bits.osrcrt)) ||
729 ((opt->dst1 || opt->dst0) &&
730 (np->rxopt.bits.dstopts || np->rxopt.bits.odstopts)))
735 EXPORT_SYMBOL_GPL(ipv6_opt_accepted);
737 static struct packet_type ipv6_packet_type __read_mostly = {
738 .type = cpu_to_be16(ETH_P_IPV6),
742 static int __init ipv6_packet_init(void)
744 dev_add_pack(&ipv6_packet_type);
748 static void ipv6_packet_cleanup(void)
750 dev_remove_pack(&ipv6_packet_type);
753 static int __net_init ipv6_init_mibs(struct net *net)
755 if (snmp_mib_init((void __percpu **)net->mib.udp_stats_in6,
756 sizeof(struct udp_mib),
757 __alignof__(struct udp_mib)) < 0)
759 if (snmp_mib_init((void __percpu **)net->mib.udplite_stats_in6,
760 sizeof(struct udp_mib),
761 __alignof__(struct udp_mib)) < 0)
762 goto err_udplite_mib;
763 if (snmp_mib_init((void __percpu **)net->mib.ipv6_statistics,
764 sizeof(struct ipstats_mib),
765 __alignof__(struct ipstats_mib)) < 0)
767 if (snmp_mib_init((void __percpu **)net->mib.icmpv6_statistics,
768 sizeof(struct icmpv6_mib),
769 __alignof__(struct icmpv6_mib)) < 0)
771 net->mib.icmpv6msg_statistics = kzalloc(sizeof(struct icmpv6msg_mib),
773 if (!net->mib.icmpv6msg_statistics)
774 goto err_icmpmsg_mib;
778 snmp_mib_free((void __percpu **)net->mib.icmpv6_statistics);
780 snmp_mib_free((void __percpu **)net->mib.ipv6_statistics);
782 snmp_mib_free((void __percpu **)net->mib.udplite_stats_in6);
784 snmp_mib_free((void __percpu **)net->mib.udp_stats_in6);
788 static void ipv6_cleanup_mibs(struct net *net)
790 snmp_mib_free((void __percpu **)net->mib.udp_stats_in6);
791 snmp_mib_free((void __percpu **)net->mib.udplite_stats_in6);
792 snmp_mib_free((void __percpu **)net->mib.ipv6_statistics);
793 snmp_mib_free((void __percpu **)net->mib.icmpv6_statistics);
794 kfree(net->mib.icmpv6msg_statistics);
797 static int __net_init inet6_net_init(struct net *net)
801 net->ipv6.sysctl.bindv6only = 0;
802 net->ipv6.sysctl.icmpv6_time = 1*HZ;
804 err = ipv6_init_mibs(net);
807 #ifdef CONFIG_PROC_FS
808 err = udp6_proc_init(net);
811 err = tcp6_proc_init(net);
814 err = ac6_proc_init(net);
820 #ifdef CONFIG_PROC_FS
826 ipv6_cleanup_mibs(net);
831 static void __net_exit inet6_net_exit(struct net *net)
833 #ifdef CONFIG_PROC_FS
838 ipv6_cleanup_mibs(net);
841 static struct pernet_operations inet6_net_ops = {
842 .init = inet6_net_init,
843 .exit = inet6_net_exit,
846 static int __init inet6_init(void)
851 BUILD_BUG_ON(sizeof(struct inet6_skb_parm) > FIELD_SIZEOF(struct sk_buff, cb));
853 /* Register the socket-side information for inet6_create. */
854 for (r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r)
857 if (disable_ipv6_mod) {
858 pr_info("Loaded, but administratively disabled, reboot required to enable\n");
862 err = proto_register(&tcpv6_prot, 1);
866 err = proto_register(&udpv6_prot, 1);
868 goto out_unregister_tcp_proto;
870 err = proto_register(&udplitev6_prot, 1);
872 goto out_unregister_udp_proto;
874 err = proto_register(&rawv6_prot, 1);
876 goto out_unregister_udplite_proto;
878 err = proto_register(&pingv6_prot, 1);
880 goto out_unregister_ping_proto;
882 /* We MUST register RAW sockets before we create the ICMP6,
883 * IGMP6, or NDISC control sockets.
887 goto out_unregister_raw_proto;
889 /* Register the family here so that the init calls below will
890 * be able to create sockets. (?? is this dangerous ??)
892 err = sock_register(&inet6_family_ops);
894 goto out_sock_register_fail;
896 tcpv6_prot.sysctl_mem = init_net.ipv4.sysctl_tcp_mem;
899 * ipngwg API draft makes clear that the correct semantics
900 * for TCP and UDP is to consider one TCP and UDP instance
901 * in a host available by both INET and INET6 APIs and
902 * able to communicate via both network protocols.
905 err = register_pernet_subsys(&inet6_net_ops);
907 goto register_pernet_fail;
920 err = ipv6_netfilter_init();
923 /* Create /proc/foo6 entries. */
924 #ifdef CONFIG_PROC_FS
926 if (raw6_proc_init())
928 if (udplite6_proc_init())
929 goto proc_udplite6_fail;
930 if (ipv6_misc_proc_init())
931 goto proc_misc6_fail;
935 err = ip6_route_init();
938 err = ip6_flowlabel_init();
940 goto ip6_flowlabel_fail;
941 err = addrconf_init();
945 /* Init v6 extension headers. */
946 err = ipv6_exthdrs_init();
948 goto ipv6_exthdrs_fail;
950 err = ipv6_frag_init();
954 /* Init v6 transport protocols. */
959 err = udplitev6_init();
967 err = ipv6_packet_init();
969 goto ipv6_packet_fail;
976 err = ipv6_sysctl_register();
985 ipv6_packet_cleanup();
1002 ip6_flowlabel_cleanup();
1004 ip6_route_cleanup();
1006 #ifdef CONFIG_PROC_FS
1009 ipv6_misc_proc_exit();
1011 udplite6_proc_exit();
1016 ipv6_netfilter_fini();
1026 unregister_pernet_subsys(&inet6_net_ops);
1027 register_pernet_fail:
1028 sock_unregister(PF_INET6);
1029 rtnl_unregister_all(PF_INET6);
1030 out_sock_register_fail:
1032 out_unregister_ping_proto:
1033 proto_unregister(&pingv6_prot);
1034 out_unregister_raw_proto:
1035 proto_unregister(&rawv6_prot);
1036 out_unregister_udplite_proto:
1037 proto_unregister(&udplitev6_prot);
1038 out_unregister_udp_proto:
1039 proto_unregister(&udpv6_prot);
1040 out_unregister_tcp_proto:
1041 proto_unregister(&tcpv6_prot);
1044 module_init(inet6_init);
1046 static void __exit inet6_exit(void)
1048 if (disable_ipv6_mod)
1051 /* First of all disallow new sockets creation. */
1052 sock_unregister(PF_INET6);
1053 /* Disallow any further netlink messages */
1054 rtnl_unregister_all(PF_INET6);
1060 /* Cleanup code parts. */
1061 ipv6_packet_cleanup();
1063 ipv6_exthdrs_exit();
1065 ip6_flowlabel_cleanup();
1066 ip6_route_cleanup();
1067 #ifdef CONFIG_PROC_FS
1069 /* Cleanup code parts. */
1071 ipv6_misc_proc_exit();
1072 udplite6_proc_exit();
1075 ipv6_netfilter_fini();
1082 unregister_pernet_subsys(&inet6_net_ops);
1083 proto_unregister(&rawv6_prot);
1084 proto_unregister(&udplitev6_prot);
1085 proto_unregister(&udpv6_prot);
1086 proto_unregister(&tcpv6_prot);
1088 rcu_barrier(); /* Wait for completion of call_rcu()'s */
1090 module_exit(inet6_exit);
1092 MODULE_ALIAS_NETPROTO(PF_INET6);