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
10 * $Id: af_inet6.c,v 1.66 2002/02/01 22:01:04 davem Exp $
13 * piggy, Karl Knutson : Socket protocol table
14 * Hideaki YOSHIFUJI : sin6_scope_id support
15 * Arnaldo Melo : check proc_net_create return, cleanups
17 * This program is free software; you can redistribute it and/or
18 * modify it under the terms of the GNU General Public License
19 * as published by the Free Software Foundation; either version
20 * 2 of the License, or (at your option) any later version.
24 #include <linux/module.h>
25 #include <linux/capability.h>
26 #include <linux/errno.h>
27 #include <linux/types.h>
28 #include <linux/socket.h>
30 #include <linux/kernel.h>
31 #include <linux/timer.h>
32 #include <linux/string.h>
33 #include <linux/sockios.h>
34 #include <linux/net.h>
35 #include <linux/fcntl.h>
37 #include <linux/interrupt.h>
38 #include <linux/proc_fs.h>
39 #include <linux/stat.h>
40 #include <linux/init.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/transp_v6.h>
56 #include <net/ip6_route.h>
57 #include <net/addrconf.h>
58 #ifdef CONFIG_IPV6_TUNNEL
59 #include <net/ip6_tunnel.h>
62 #include <asm/uaccess.h>
63 #include <asm/system.h>
65 MODULE_AUTHOR("Cast of dozens");
66 MODULE_DESCRIPTION("IPv6 protocol stack for Linux");
67 MODULE_LICENSE("GPL");
69 /* The inetsw6 table contains everything that inet6_create needs to
72 static struct list_head inetsw6[SOCK_MAX];
73 static DEFINE_SPINLOCK(inetsw6_lock);
75 static __inline__ struct ipv6_pinfo *inet6_sk_generic(struct sock *sk)
77 const int offset = sk->sk_prot->obj_size - sizeof(struct ipv6_pinfo);
79 return (struct ipv6_pinfo *)(((u8 *)sk) + offset);
82 static int inet6_create(struct net *net, struct socket *sock, int protocol)
84 struct inet_sock *inet;
85 struct ipv6_pinfo *np;
88 struct inet_protosw *answer;
89 struct proto *answer_prot;
90 unsigned char answer_flags;
92 int try_loading_module = 0;
98 if (sock->type != SOCK_RAW &&
99 sock->type != SOCK_DGRAM &&
101 build_ehash_secret();
103 /* Look for the requested type/protocol pair. */
106 err = -ESOCKTNOSUPPORT;
108 list_for_each_rcu(p, &inetsw6[sock->type]) {
109 answer = list_entry(p, struct inet_protosw, list);
111 /* Check the non-wild match. */
112 if (protocol == answer->protocol) {
113 if (protocol != IPPROTO_IP)
116 /* Check for the two wild cases. */
117 if (IPPROTO_IP == protocol) {
118 protocol = answer->protocol;
121 if (IPPROTO_IP == answer->protocol)
124 err = -EPROTONOSUPPORT;
129 if (try_loading_module < 2) {
132 * Be more specific, e.g. net-pf-10-proto-132-type-1
133 * (net-pf-PF_INET6-proto-IPPROTO_SCTP-type-SOCK_STREAM)
135 if (++try_loading_module == 1)
136 request_module("net-pf-%d-proto-%d-type-%d",
137 PF_INET6, protocol, sock->type);
139 * Fall back to generic, e.g. net-pf-10-proto-132
140 * (net-pf-PF_INET6-proto-IPPROTO_SCTP)
143 request_module("net-pf-%d-proto-%d",
145 goto lookup_protocol;
151 if (answer->capability > 0 && !capable(answer->capability))
154 sock->ops = answer->ops;
155 answer_prot = answer->prot;
156 answer_no_check = answer->no_check;
157 answer_flags = answer->flags;
160 BUG_TRAP(answer_prot->slab != NULL);
163 sk = sk_alloc(net, PF_INET6, GFP_KERNEL, answer_prot);
167 sock_init_data(sock, sk);
170 sk->sk_no_check = answer_no_check;
171 if (INET_PROTOSW_REUSE & answer_flags)
175 inet->is_icsk = (INET_PROTOSW_ICSK & answer_flags) != 0;
177 if (SOCK_RAW == sock->type) {
178 inet->num = protocol;
179 if (IPPROTO_RAW == protocol)
183 sk->sk_destruct = inet_sock_destruct;
184 sk->sk_family = PF_INET6;
185 sk->sk_protocol = protocol;
187 sk->sk_backlog_rcv = answer->prot->backlog_rcv;
189 inet_sk(sk)->pinet6 = np = inet6_sk_generic(sk);
193 np->pmtudisc = IPV6_PMTUDISC_WANT;
194 np->ipv6only = init_net.ipv6.sysctl.bindv6only;
196 /* Init the ipv4 part of the socket since we can have sockets
197 * using v6 API for ipv4.
204 inet->mc_list = NULL;
206 if (ipv4_config.no_pmtu_disc)
207 inet->pmtudisc = IP_PMTUDISC_DONT;
209 inet->pmtudisc = IP_PMTUDISC_WANT;
211 * Increment only the relevant sk_prot->socks debug field, this changes
212 * the previous behaviour of incrementing both the equivalent to
213 * answer->prot->socks (inet6_sock_nr) and inet_sock_nr.
215 * This allows better debug granularity as we'll know exactly how many
216 * UDPv6, TCPv6, etc socks were allocated, not the sum of all IPv6
217 * transport protocol socks. -acme
219 sk_refcnt_debug_inc(sk);
222 /* It assumes that any protocol which allows
223 * the user to assign a number at socket
224 * creation time automatically shares.
226 inet->sport = htons(inet->num);
227 sk->sk_prot->hash(sk);
229 if (sk->sk_prot->init) {
230 err = sk->sk_prot->init(sk);
232 sk_common_release(sk);
244 /* bind for INET6 API */
245 int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
247 struct sockaddr_in6 *addr=(struct sockaddr_in6 *)uaddr;
248 struct sock *sk = sock->sk;
249 struct inet_sock *inet = inet_sk(sk);
250 struct ipv6_pinfo *np = inet6_sk(sk);
256 /* If the socket has its own bind function then use it. */
257 if (sk->sk_prot->bind)
258 return sk->sk_prot->bind(sk, uaddr, addr_len);
260 if (addr_len < SIN6_LEN_RFC2133)
262 addr_type = ipv6_addr_type(&addr->sin6_addr);
263 if ((addr_type & IPV6_ADDR_MULTICAST) && sock->type == SOCK_STREAM)
266 snum = ntohs(addr->sin6_port);
267 if (snum && snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
272 /* Check these errors (active socket, double bind). */
273 if (sk->sk_state != TCP_CLOSE || inet->num) {
278 /* Check if the address belongs to the host. */
279 if (addr_type == IPV6_ADDR_MAPPED) {
280 v4addr = addr->sin6_addr.s6_addr32[3];
281 if (inet_addr_type(&init_net, v4addr) != RTN_LOCAL) {
282 err = -EADDRNOTAVAIL;
286 if (addr_type != IPV6_ADDR_ANY) {
287 struct net_device *dev = NULL;
289 if (addr_type & IPV6_ADDR_LINKLOCAL) {
290 if (addr_len >= sizeof(struct sockaddr_in6) &&
291 addr->sin6_scope_id) {
292 /* Override any existing binding, if another one
293 * is supplied by user.
295 sk->sk_bound_dev_if = addr->sin6_scope_id;
298 /* Binding to link-local address requires an interface */
299 if (!sk->sk_bound_dev_if) {
303 dev = dev_get_by_index(&init_net, sk->sk_bound_dev_if);
310 /* ipv4 addr of the socket is invalid. Only the
311 * unspecified and mapped address have a v4 equivalent.
313 v4addr = LOOPBACK4_IPV6;
314 if (!(addr_type & IPV6_ADDR_MULTICAST)) {
315 if (!ipv6_chk_addr(&init_net, &addr->sin6_addr,
319 err = -EADDRNOTAVAIL;
328 inet->rcv_saddr = v4addr;
329 inet->saddr = v4addr;
331 ipv6_addr_copy(&np->rcv_saddr, &addr->sin6_addr);
333 if (!(addr_type & IPV6_ADDR_MULTICAST))
334 ipv6_addr_copy(&np->saddr, &addr->sin6_addr);
336 /* Make sure we are allowed to bind here. */
337 if (sk->sk_prot->get_port(sk, snum)) {
338 inet_reset_saddr(sk);
343 if (addr_type != IPV6_ADDR_ANY)
344 sk->sk_userlocks |= SOCK_BINDADDR_LOCK;
346 sk->sk_userlocks |= SOCK_BINDPORT_LOCK;
347 inet->sport = htons(inet->num);
355 EXPORT_SYMBOL(inet6_bind);
357 int inet6_release(struct socket *sock)
359 struct sock *sk = sock->sk;
365 ipv6_sock_mc_close(sk);
368 ipv6_sock_ac_close(sk);
370 return inet_release(sock);
373 EXPORT_SYMBOL(inet6_release);
375 int inet6_destroy_sock(struct sock *sk)
377 struct ipv6_pinfo *np = inet6_sk(sk);
379 struct ipv6_txoptions *opt;
381 /* Release rx options */
383 if ((skb = xchg(&np->pktoptions, NULL)) != NULL)
386 /* Free flowlabels */
387 fl6_free_socklist(sk);
389 /* Free tx options */
391 if ((opt = xchg(&np->opt, NULL)) != NULL)
392 sock_kfree_s(sk, opt, opt->tot_len);
397 EXPORT_SYMBOL_GPL(inet6_destroy_sock);
400 * This does both peername and sockname.
403 int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
404 int *uaddr_len, int peer)
406 struct sockaddr_in6 *sin=(struct sockaddr_in6 *)uaddr;
407 struct sock *sk = sock->sk;
408 struct inet_sock *inet = inet_sk(sk);
409 struct ipv6_pinfo *np = inet6_sk(sk);
411 sin->sin6_family = AF_INET6;
412 sin->sin6_flowinfo = 0;
413 sin->sin6_scope_id = 0;
417 if (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) &&
420 sin->sin6_port = inet->dport;
421 ipv6_addr_copy(&sin->sin6_addr, &np->daddr);
423 sin->sin6_flowinfo = np->flow_label;
425 if (ipv6_addr_any(&np->rcv_saddr))
426 ipv6_addr_copy(&sin->sin6_addr, &np->saddr);
428 ipv6_addr_copy(&sin->sin6_addr, &np->rcv_saddr);
430 sin->sin6_port = inet->sport;
432 if (ipv6_addr_type(&sin->sin6_addr) & IPV6_ADDR_LINKLOCAL)
433 sin->sin6_scope_id = sk->sk_bound_dev_if;
434 *uaddr_len = sizeof(*sin);
438 EXPORT_SYMBOL(inet6_getname);
440 int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
442 struct sock *sk = sock->sk;
443 struct net *net = sk->sk_net;
448 return sock_get_timestamp(sk, (struct timeval __user *)arg);
451 return sock_get_timestampns(sk, (struct timespec __user *)arg);
456 return(ipv6_route_ioctl(net, cmd, (void __user *)arg));
459 return addrconf_add_ifaddr((void __user *) arg);
461 return addrconf_del_ifaddr((void __user *) arg);
463 return addrconf_set_dstaddr((void __user *) arg);
465 if (!sk->sk_prot->ioctl)
467 return sk->sk_prot->ioctl(sk, cmd, arg);
473 EXPORT_SYMBOL(inet6_ioctl);
475 const struct proto_ops inet6_stream_ops = {
477 .owner = THIS_MODULE,
478 .release = inet6_release,
480 .connect = inet_stream_connect, /* ok */
481 .socketpair = sock_no_socketpair, /* a do nothing */
482 .accept = inet_accept, /* ok */
483 .getname = inet6_getname,
484 .poll = tcp_poll, /* ok */
485 .ioctl = inet6_ioctl, /* must change */
486 .listen = inet_listen, /* ok */
487 .shutdown = inet_shutdown, /* ok */
488 .setsockopt = sock_common_setsockopt, /* ok */
489 .getsockopt = sock_common_getsockopt, /* ok */
490 .sendmsg = tcp_sendmsg, /* ok */
491 .recvmsg = sock_common_recvmsg, /* ok */
492 .mmap = sock_no_mmap,
493 .sendpage = tcp_sendpage,
494 .splice_read = tcp_splice_read,
496 .compat_setsockopt = compat_sock_common_setsockopt,
497 .compat_getsockopt = compat_sock_common_getsockopt,
501 const struct proto_ops inet6_dgram_ops = {
503 .owner = THIS_MODULE,
504 .release = inet6_release,
506 .connect = inet_dgram_connect, /* ok */
507 .socketpair = sock_no_socketpair, /* a do nothing */
508 .accept = sock_no_accept, /* a do nothing */
509 .getname = inet6_getname,
510 .poll = udp_poll, /* ok */
511 .ioctl = inet6_ioctl, /* must change */
512 .listen = sock_no_listen, /* ok */
513 .shutdown = inet_shutdown, /* ok */
514 .setsockopt = sock_common_setsockopt, /* ok */
515 .getsockopt = sock_common_getsockopt, /* ok */
516 .sendmsg = inet_sendmsg, /* ok */
517 .recvmsg = sock_common_recvmsg, /* ok */
518 .mmap = sock_no_mmap,
519 .sendpage = sock_no_sendpage,
521 .compat_setsockopt = compat_sock_common_setsockopt,
522 .compat_getsockopt = compat_sock_common_getsockopt,
526 static struct net_proto_family inet6_family_ops = {
528 .create = inet6_create,
529 .owner = THIS_MODULE,
532 int inet6_register_protosw(struct inet_protosw *p)
534 struct list_head *lh;
535 struct inet_protosw *answer;
536 struct list_head *last_perm;
537 int protocol = p->protocol;
540 spin_lock_bh(&inetsw6_lock);
543 if (p->type >= SOCK_MAX)
546 /* If we are trying to override a permanent protocol, bail. */
549 last_perm = &inetsw6[p->type];
550 list_for_each(lh, &inetsw6[p->type]) {
551 answer = list_entry(lh, struct inet_protosw, list);
553 /* Check only the non-wild match. */
554 if (INET_PROTOSW_PERMANENT & answer->flags) {
555 if (protocol == answer->protocol)
565 /* Add the new entry after the last permanent entry if any, so that
566 * the new entry does not override a permanent entry when matched with
567 * a wild-card protocol. But it is allowed to override any existing
568 * non-permanent entry. This means that when we remove this entry, the
569 * system automatically returns to the old behavior.
571 list_add_rcu(&p->list, last_perm);
574 spin_unlock_bh(&inetsw6_lock);
578 printk(KERN_ERR "Attempt to override permanent protocol %d.\n",
584 "Ignoring attempt to register invalid socket type %d.\n",
589 EXPORT_SYMBOL(inet6_register_protosw);
592 inet6_unregister_protosw(struct inet_protosw *p)
594 if (INET_PROTOSW_PERMANENT & p->flags) {
596 "Attempt to unregister permanent protocol %d.\n",
599 spin_lock_bh(&inetsw6_lock);
600 list_del_rcu(&p->list);
601 spin_unlock_bh(&inetsw6_lock);
607 EXPORT_SYMBOL(inet6_unregister_protosw);
609 int inet6_sk_rebuild_header(struct sock *sk)
612 struct dst_entry *dst;
613 struct ipv6_pinfo *np = inet6_sk(sk);
615 dst = __sk_dst_check(sk, np->dst_cookie);
618 struct inet_sock *inet = inet_sk(sk);
619 struct in6_addr *final_p = NULL, final;
622 memset(&fl, 0, sizeof(fl));
623 fl.proto = sk->sk_protocol;
624 ipv6_addr_copy(&fl.fl6_dst, &np->daddr);
625 ipv6_addr_copy(&fl.fl6_src, &np->saddr);
626 fl.fl6_flowlabel = np->flow_label;
627 fl.oif = sk->sk_bound_dev_if;
628 fl.fl_ip_dport = inet->dport;
629 fl.fl_ip_sport = inet->sport;
630 security_sk_classify_flow(sk, &fl);
632 if (np->opt && np->opt->srcrt) {
633 struct rt0_hdr *rt0 = (struct rt0_hdr *) np->opt->srcrt;
634 ipv6_addr_copy(&final, &fl.fl6_dst);
635 ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
639 err = ip6_dst_lookup(sk, &dst, &fl);
641 sk->sk_route_caps = 0;
645 ipv6_addr_copy(&fl.fl6_dst, final_p);
647 if ((err = xfrm_lookup(&dst, &fl, sk, 0)) < 0) {
648 sk->sk_err_soft = -err;
652 __ip6_dst_store(sk, dst, NULL, NULL);
658 EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header);
660 int ipv6_opt_accepted(struct sock *sk, struct sk_buff *skb)
662 struct ipv6_pinfo *np = inet6_sk(sk);
663 struct inet6_skb_parm *opt = IP6CB(skb);
666 if ((opt->hop && (np->rxopt.bits.hopopts ||
667 np->rxopt.bits.ohopopts)) ||
668 ((IPV6_FLOWINFO_MASK &
669 *(__be32 *)skb_network_header(skb)) &&
670 np->rxopt.bits.rxflow) ||
671 (opt->srcrt && (np->rxopt.bits.srcrt ||
672 np->rxopt.bits.osrcrt)) ||
673 ((opt->dst1 || opt->dst0) &&
674 (np->rxopt.bits.dstopts || np->rxopt.bits.odstopts)))
680 EXPORT_SYMBOL_GPL(ipv6_opt_accepted);
682 static struct inet6_protocol *ipv6_gso_pull_exthdrs(struct sk_buff *skb,
685 struct inet6_protocol *ops = NULL;
688 struct ipv6_opt_hdr *opth;
691 if (proto != NEXTHDR_HOP) {
692 ops = rcu_dereference(inet6_protos[proto]);
697 if (!(ops->flags & INET6_PROTO_GSO_EXTHDR))
701 if (unlikely(!pskb_may_pull(skb, 8)))
704 opth = (void *)skb->data;
705 len = ipv6_optlen(opth);
707 if (unlikely(!pskb_may_pull(skb, len)))
710 proto = opth->nexthdr;
711 __skb_pull(skb, len);
717 static int ipv6_gso_send_check(struct sk_buff *skb)
719 struct ipv6hdr *ipv6h;
720 struct inet6_protocol *ops;
723 if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h))))
726 ipv6h = ipv6_hdr(skb);
727 __skb_pull(skb, sizeof(*ipv6h));
728 err = -EPROTONOSUPPORT;
731 ops = ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr);
732 if (likely(ops && ops->gso_send_check)) {
733 skb_reset_transport_header(skb);
734 err = ops->gso_send_check(skb);
742 static struct sk_buff *ipv6_gso_segment(struct sk_buff *skb, int features)
744 struct sk_buff *segs = ERR_PTR(-EINVAL);
745 struct ipv6hdr *ipv6h;
746 struct inet6_protocol *ops;
748 if (!(features & NETIF_F_V6_CSUM))
749 features &= ~NETIF_F_SG;
751 if (unlikely(skb_shinfo(skb)->gso_type &
759 if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h))))
762 ipv6h = ipv6_hdr(skb);
763 __skb_pull(skb, sizeof(*ipv6h));
764 segs = ERR_PTR(-EPROTONOSUPPORT);
767 ops = ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr);
768 if (likely(ops && ops->gso_segment)) {
769 skb_reset_transport_header(skb);
770 segs = ops->gso_segment(skb, features);
774 if (unlikely(IS_ERR(segs)))
777 for (skb = segs; skb; skb = skb->next) {
778 ipv6h = ipv6_hdr(skb);
779 ipv6h->payload_len = htons(skb->len - skb->mac_len -
787 static struct packet_type ipv6_packet_type = {
788 .type = __constant_htons(ETH_P_IPV6),
790 .gso_send_check = ipv6_gso_send_check,
791 .gso_segment = ipv6_gso_segment,
794 static int __init ipv6_packet_init(void)
796 dev_add_pack(&ipv6_packet_type);
800 static void ipv6_packet_cleanup(void)
802 dev_remove_pack(&ipv6_packet_type);
805 static int __init init_ipv6_mibs(void)
807 if (snmp_mib_init((void **)ipv6_statistics,
808 sizeof(struct ipstats_mib)) < 0)
810 if (snmp_mib_init((void **)icmpv6_statistics,
811 sizeof(struct icmpv6_mib)) < 0)
813 if (snmp_mib_init((void **)icmpv6msg_statistics,
814 sizeof(struct icmpv6msg_mib)) < 0)
815 goto err_icmpmsg_mib;
816 if (snmp_mib_init((void **)udp_stats_in6, sizeof (struct udp_mib)) < 0)
818 #ifdef CONFIG_IP_UDPLITE
819 if (snmp_mib_init((void **)udplite_stats_in6,
820 sizeof (struct udp_mib)) < 0)
821 goto err_udplite_mib;
825 #ifdef CONFIG_IP_UDPLITE
828 snmp_mib_free((void **)udp_stats_in6);
830 snmp_mib_free((void **)icmpv6msg_statistics);
832 snmp_mib_free((void **)icmpv6_statistics);
834 snmp_mib_free((void **)ipv6_statistics);
840 static void cleanup_ipv6_mibs(void)
842 snmp_mib_free((void **)ipv6_statistics);
843 snmp_mib_free((void **)icmpv6_statistics);
844 snmp_mib_free((void **)icmpv6msg_statistics);
845 snmp_mib_free((void **)udp_stats_in6);
846 #ifdef CONFIG_IP_UDPLITE
847 snmp_mib_free((void **)udplite_stats_in6);
851 static int inet6_net_init(struct net *net)
853 net->ipv6.sysctl.bindv6only = 0;
854 net->ipv6.sysctl.flush_delay = 0;
855 net->ipv6.sysctl.ip6_rt_max_size = 4096;
856 net->ipv6.sysctl.ip6_rt_gc_min_interval = HZ / 2;
857 net->ipv6.sysctl.ip6_rt_gc_timeout = 60*HZ;
858 net->ipv6.sysctl.ip6_rt_gc_interval = 30*HZ;
859 net->ipv6.sysctl.ip6_rt_gc_elasticity = 9;
860 net->ipv6.sysctl.ip6_rt_mtu_expires = 10*60*HZ;
861 net->ipv6.sysctl.ip6_rt_min_advmss = IPV6_MIN_MTU - 20 - 40;
862 net->ipv6.sysctl.icmpv6_time = 1*HZ;
867 static void inet6_net_exit(struct net *net)
872 static struct pernet_operations inet6_net_ops = {
873 .init = inet6_net_init,
874 .exit = inet6_net_exit,
877 static int __init inet6_init(void)
879 struct sk_buff *dummy_skb;
883 BUILD_BUG_ON(sizeof(struct inet6_skb_parm) > sizeof(dummy_skb->cb));
885 err = proto_register(&tcpv6_prot, 1);
889 err = proto_register(&udpv6_prot, 1);
891 goto out_unregister_tcp_proto;
893 #ifdef CONFIG_IP_UDPLITE
894 err = proto_register(&udplitev6_prot, 1);
896 goto out_unregister_udp_proto;
899 err = proto_register(&rawv6_prot, 1);
901 goto out_unregister_udplite_proto;
904 /* Register the socket-side information for inet6_create. */
905 for(r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r)
908 /* We MUST register RAW sockets before we create the ICMP6,
909 * IGMP6, or NDISC control sockets.
913 goto out_unregister_raw_proto;
915 /* Register the family here so that the init calls below will
916 * be able to create sockets. (?? is this dangerous ??)
918 err = sock_register(&inet6_family_ops);
920 goto out_sock_register_fail;
922 /* Initialise ipv6 mibs */
923 err = init_ipv6_mibs();
925 goto out_unregister_sock;
928 * ipngwg API draft makes clear that the correct semantics
929 * for TCP and UDP is to consider one TCP and UDP instance
930 * in a host availiable by both INET and INET6 APIs and
931 * able to communicate via both network protocols.
934 err = register_pernet_subsys(&inet6_net_ops);
936 goto register_pernet_fail;
939 err = ipv6_sysctl_register();
952 err = ipv6_netfilter_init();
955 /* Create /proc/foo6 entries. */
956 #ifdef CONFIG_PROC_FS
958 if (raw6_proc_init())
960 if (tcp6_proc_init())
962 if (udp6_proc_init())
964 if (udplite6_proc_init())
965 goto proc_udplite6_fail;
966 if (ipv6_misc_proc_init())
967 goto proc_misc6_fail;
970 goto proc_anycast6_fail;
974 err = ip6_route_init();
977 err = ip6_flowlabel_init();
979 goto ip6_flowlabel_fail;
980 err = addrconf_init();
984 /* Init v6 extension headers. */
985 err = ipv6_exthdrs_init();
987 goto ipv6_exthdrs_fail;
989 err = ipv6_frag_init();
993 /* Init v6 transport protocols. */
998 err = udplitev6_init();
1000 goto udplitev6_fail;
1006 err = ipv6_packet_init();
1008 goto ipv6_packet_fail;
1021 ipv6_exthdrs_exit();
1025 ip6_flowlabel_cleanup();
1027 ip6_route_cleanup();
1029 #ifdef CONFIG_PROC_FS
1034 ipv6_misc_proc_exit();
1036 udplite6_proc_exit();
1045 ipv6_netfilter_fini();
1053 #ifdef CONFIG_SYSCTL
1054 ipv6_sysctl_unregister();
1057 unregister_pernet_subsys(&inet6_net_ops);
1058 register_pernet_fail:
1059 cleanup_ipv6_mibs();
1060 out_unregister_sock:
1061 sock_unregister(PF_INET6);
1062 rtnl_unregister_all(PF_INET6);
1063 out_sock_register_fail:
1065 out_unregister_raw_proto:
1066 proto_unregister(&rawv6_prot);
1067 out_unregister_udplite_proto:
1068 #ifdef CONFIG_IP_UDPLITE
1069 proto_unregister(&udplitev6_prot);
1070 out_unregister_udp_proto:
1072 proto_unregister(&udpv6_prot);
1073 out_unregister_tcp_proto:
1074 proto_unregister(&tcpv6_prot);
1077 module_init(inet6_init);
1079 static void __exit inet6_exit(void)
1081 /* First of all disallow new sockets creation. */
1082 sock_unregister(PF_INET6);
1083 /* Disallow any further netlink messages */
1084 rtnl_unregister_all(PF_INET6);
1087 #ifdef CONFIG_IP_UDPLITE
1092 /* Cleanup code parts. */
1093 ipv6_packet_cleanup();
1095 ipv6_exthdrs_exit();
1097 ip6_flowlabel_cleanup();
1098 ip6_route_cleanup();
1099 #ifdef CONFIG_PROC_FS
1101 /* Cleanup code parts. */
1104 ipv6_misc_proc_exit();
1105 udplite6_proc_exit();
1110 ipv6_netfilter_fini();
1115 #ifdef CONFIG_SYSCTL
1116 ipv6_sysctl_unregister();
1118 unregister_pernet_subsys(&inet6_net_ops);
1119 cleanup_ipv6_mibs();
1120 proto_unregister(&rawv6_prot);
1121 #ifdef CONFIG_IP_UDPLITE
1122 proto_unregister(&udplitev6_prot);
1124 proto_unregister(&udpv6_prot);
1125 proto_unregister(&tcpv6_prot);
1127 module_exit(inet6_exit);
1129 MODULE_ALIAS_NETPROTO(PF_INET6);