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 #include <net/ndisc.h>
60 #ifdef CONFIG_IPV6_TUNNEL
61 #include <net/ip6_tunnel.h>
64 #include <asm/uaccess.h>
65 #include <linux/mroute6.h>
67 MODULE_AUTHOR("Cast of dozens");
68 MODULE_DESCRIPTION("IPv6 protocol stack for Linux");
69 MODULE_LICENSE("GPL");
71 /* The inetsw6 table contains everything that inet6_create needs to
74 static struct list_head inetsw6
[SOCK_MAX
];
75 static DEFINE_SPINLOCK(inetsw6_lock
);
77 struct ipv6_params ipv6_defaults
= {
82 static int disable_ipv6_mod
;
84 module_param_named(disable
, disable_ipv6_mod
, int, 0444);
85 MODULE_PARM_DESC(disable
, "Disable IPv6 module such that it is non-functional");
87 module_param_named(disable_ipv6
, ipv6_defaults
.disable_ipv6
, int, 0444);
88 MODULE_PARM_DESC(disable_ipv6
, "Disable IPv6 on all interfaces");
90 module_param_named(autoconf
, ipv6_defaults
.autoconf
, int, 0444);
91 MODULE_PARM_DESC(autoconf
, "Enable IPv6 address autoconfiguration on all interfaces");
93 static __inline__
struct ipv6_pinfo
*inet6_sk_generic(struct sock
*sk
)
95 const int offset
= sk
->sk_prot
->obj_size
- sizeof(struct ipv6_pinfo
);
97 return (struct ipv6_pinfo
*)(((u8
*)sk
) + offset
);
100 static int inet6_create(struct net
*net
, struct socket
*sock
, int protocol
,
103 struct inet_sock
*inet
;
104 struct ipv6_pinfo
*np
;
106 struct inet_protosw
*answer
;
107 struct proto
*answer_prot
;
108 unsigned char answer_flags
;
109 int try_loading_module
= 0;
112 /* Look for the requested type/protocol pair. */
114 err
= -ESOCKTNOSUPPORT
;
116 list_for_each_entry_rcu(answer
, &inetsw6
[sock
->type
], list
) {
119 /* Check the non-wild match. */
120 if (protocol
== answer
->protocol
) {
121 if (protocol
!= IPPROTO_IP
)
124 /* Check for the two wild cases. */
125 if (IPPROTO_IP
== protocol
) {
126 protocol
= answer
->protocol
;
129 if (IPPROTO_IP
== answer
->protocol
)
132 err
= -EPROTONOSUPPORT
;
136 if (try_loading_module
< 2) {
139 * Be more specific, e.g. net-pf-10-proto-132-type-1
140 * (net-pf-PF_INET6-proto-IPPROTO_SCTP-type-SOCK_STREAM)
142 if (++try_loading_module
== 1)
143 request_module("net-pf-%d-proto-%d-type-%d",
144 PF_INET6
, protocol
, sock
->type
);
146 * Fall back to generic, e.g. net-pf-10-proto-132
147 * (net-pf-PF_INET6-proto-IPPROTO_SCTP)
150 request_module("net-pf-%d-proto-%d",
152 goto lookup_protocol
;
158 if (sock
->type
== SOCK_RAW
&& !kern
&&
159 !ns_capable(net
->user_ns
, CAP_NET_RAW
))
162 sock
->ops
= answer
->ops
;
163 answer_prot
= answer
->prot
;
164 answer_flags
= answer
->flags
;
167 WARN_ON(!answer_prot
->slab
);
170 sk
= sk_alloc(net
, PF_INET6
, GFP_KERNEL
, answer_prot
, kern
);
174 sock_init_data(sock
, sk
);
177 if (INET_PROTOSW_REUSE
& answer_flags
)
178 sk
->sk_reuse
= SK_CAN_REUSE
;
181 inet
->is_icsk
= (INET_PROTOSW_ICSK
& answer_flags
) != 0;
183 if (SOCK_RAW
== sock
->type
) {
184 inet
->inet_num
= protocol
;
185 if (IPPROTO_RAW
== protocol
)
189 sk
->sk_destruct
= inet_sock_destruct
;
190 sk
->sk_family
= PF_INET6
;
191 sk
->sk_protocol
= protocol
;
193 sk
->sk_backlog_rcv
= answer
->prot
->backlog_rcv
;
195 inet_sk(sk
)->pinet6
= np
= inet6_sk_generic(sk
);
197 np
->mcast_hops
= IPV6_DEFAULT_MCASTHOPS
;
199 np
->pmtudisc
= IPV6_PMTUDISC_WANT
;
200 sk
->sk_ipv6only
= net
->ipv6
.sysctl
.bindv6only
;
202 /* Init the ipv4 part of the socket since we can have sockets
203 * using v6 API for ipv4.
210 inet
->mc_list
= NULL
;
213 if (net
->ipv4
.sysctl_ip_no_pmtu_disc
)
214 inet
->pmtudisc
= IP_PMTUDISC_DONT
;
216 inet
->pmtudisc
= IP_PMTUDISC_WANT
;
218 * Increment only the relevant sk_prot->socks debug field, this changes
219 * the previous behaviour of incrementing both the equivalent to
220 * answer->prot->socks (inet6_sock_nr) and inet_sock_nr.
222 * This allows better debug granularity as we'll know exactly how many
223 * UDPv6, TCPv6, etc socks were allocated, not the sum of all IPv6
224 * transport protocol socks. -acme
226 sk_refcnt_debug_inc(sk
);
228 if (inet
->inet_num
) {
229 /* It assumes that any protocol which allows
230 * the user to assign a number at socket
231 * creation time automatically shares.
233 inet
->inet_sport
= htons(inet
->inet_num
);
234 sk
->sk_prot
->hash(sk
);
236 if (sk
->sk_prot
->init
) {
237 err
= sk
->sk_prot
->init(sk
);
239 sk_common_release(sk
);
251 /* bind for INET6 API */
252 int inet6_bind(struct socket
*sock
, struct sockaddr
*uaddr
, int addr_len
)
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
);
264 /* If the socket has its own bind function then use it. */
265 if (sk
->sk_prot
->bind
)
266 return sk
->sk_prot
->bind(sk
, uaddr
, addr_len
);
268 if (addr_len
< SIN6_LEN_RFC2133
)
271 if (addr
->sin6_family
!= AF_INET6
)
272 return -EAFNOSUPPORT
;
274 addr_type
= ipv6_addr_type(&addr
->sin6_addr
);
275 if ((addr_type
& IPV6_ADDR_MULTICAST
) && sock
->type
== SOCK_STREAM
)
278 snum
= ntohs(addr
->sin6_port
);
279 if (snum
&& snum
< PROT_SOCK
&& !ns_capable(net
->user_ns
, CAP_NET_BIND_SERVICE
))
284 /* Check these errors (active socket, double bind). */
285 if (sk
->sk_state
!= TCP_CLOSE
|| inet
->inet_num
) {
290 /* Check if the address belongs to the host. */
291 if (addr_type
== IPV6_ADDR_MAPPED
) {
294 /* Binding to v4-mapped address on a v6-only socket
297 if (sk
->sk_ipv6only
) {
302 /* Reproduce AF_INET checks to make the bindings consistent */
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
;
315 if (addr_type
!= IPV6_ADDR_ANY
) {
316 struct net_device
*dev
= NULL
;
319 if (__ipv6_addr_needs_scope_id(addr_type
)) {
320 if (addr_len
>= sizeof(struct sockaddr_in6
) &&
321 addr
->sin6_scope_id
) {
322 /* Override any existing binding, if another one
323 * is supplied by user.
325 sk
->sk_bound_dev_if
= addr
->sin6_scope_id
;
328 /* Binding to link-local address requires an interface */
329 if (!sk
->sk_bound_dev_if
) {
333 dev
= dev_get_by_index_rcu(net
, sk
->sk_bound_dev_if
);
340 /* ipv4 addr of the socket is invalid. Only the
341 * unspecified and mapped address have a v4 equivalent.
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
,
348 err
= -EADDRNOTAVAIL
;
356 inet
->inet_rcv_saddr
= v4addr
;
357 inet
->inet_saddr
= v4addr
;
359 sk
->sk_v6_rcv_saddr
= addr
->sin6_addr
;
361 if (!(addr_type
& IPV6_ADDR_MULTICAST
))
362 np
->saddr
= addr
->sin6_addr
;
364 /* Make sure we are allowed to bind here. */
365 if ((snum
|| !inet
->bind_address_no_port
) &&
366 sk
->sk_prot
->get_port(sk
, snum
)) {
367 inet_reset_saddr(sk
);
372 if (addr_type
!= IPV6_ADDR_ANY
) {
373 sk
->sk_userlocks
|= SOCK_BINDADDR_LOCK
;
374 if (addr_type
!= IPV6_ADDR_MAPPED
)
378 sk
->sk_userlocks
|= SOCK_BINDPORT_LOCK
;
379 inet
->inet_sport
= htons(inet
->inet_num
);
380 inet
->inet_dport
= 0;
381 inet
->inet_daddr
= 0;
389 EXPORT_SYMBOL(inet6_bind
);
391 int inet6_release(struct socket
*sock
)
393 struct sock
*sk
= sock
->sk
;
399 ipv6_sock_mc_close(sk
);
402 ipv6_sock_ac_close(sk
);
404 return inet_release(sock
);
406 EXPORT_SYMBOL(inet6_release
);
408 void inet6_destroy_sock(struct sock
*sk
)
410 struct ipv6_pinfo
*np
= inet6_sk(sk
);
412 struct ipv6_txoptions
*opt
;
414 /* Release rx options */
416 skb
= xchg(&np
->pktoptions
, NULL
);
420 skb
= xchg(&np
->rxpmtu
, NULL
);
424 /* Free flowlabels */
425 fl6_free_socklist(sk
);
427 /* Free tx options */
429 opt
= xchg(&np
->opt
, NULL
);
431 sock_kfree_s(sk
, opt
, opt
->tot_len
);
433 EXPORT_SYMBOL_GPL(inet6_destroy_sock
);
436 * This does both peername and sockname.
439 int inet6_getname(struct socket
*sock
, struct sockaddr
*uaddr
,
440 int *uaddr_len
, int peer
)
442 struct sockaddr_in6
*sin
= (struct sockaddr_in6
*)uaddr
;
443 struct sock
*sk
= sock
->sk
;
444 struct inet_sock
*inet
= inet_sk(sk
);
445 struct ipv6_pinfo
*np
= inet6_sk(sk
);
447 sin
->sin6_family
= AF_INET6
;
448 sin
->sin6_flowinfo
= 0;
449 sin
->sin6_scope_id
= 0;
451 if (!inet
->inet_dport
)
453 if (((1 << sk
->sk_state
) & (TCPF_CLOSE
| TCPF_SYN_SENT
)) &&
456 sin
->sin6_port
= inet
->inet_dport
;
457 sin
->sin6_addr
= sk
->sk_v6_daddr
;
459 sin
->sin6_flowinfo
= np
->flow_label
;
461 if (ipv6_addr_any(&sk
->sk_v6_rcv_saddr
))
462 sin
->sin6_addr
= np
->saddr
;
464 sin
->sin6_addr
= sk
->sk_v6_rcv_saddr
;
466 sin
->sin6_port
= inet
->inet_sport
;
468 sin
->sin6_scope_id
= ipv6_iface_scope_id(&sin
->sin6_addr
,
469 sk
->sk_bound_dev_if
);
470 *uaddr_len
= sizeof(*sin
);
473 EXPORT_SYMBOL(inet6_getname
);
475 int inet6_ioctl(struct socket
*sock
, unsigned int cmd
, unsigned long arg
)
477 struct sock
*sk
= sock
->sk
;
478 struct net
*net
= sock_net(sk
);
482 return sock_get_timestamp(sk
, (struct timeval __user
*)arg
);
485 return sock_get_timestampns(sk
, (struct timespec __user
*)arg
);
490 return ipv6_route_ioctl(net
, cmd
, (void __user
*)arg
);
493 return addrconf_add_ifaddr(net
, (void __user
*) arg
);
495 return addrconf_del_ifaddr(net
, (void __user
*) arg
);
497 return addrconf_set_dstaddr(net
, (void __user
*) arg
);
499 if (!sk
->sk_prot
->ioctl
)
501 return sk
->sk_prot
->ioctl(sk
, cmd
, arg
);
506 EXPORT_SYMBOL(inet6_ioctl
);
508 const struct proto_ops inet6_stream_ops
= {
510 .owner
= THIS_MODULE
,
511 .release
= inet6_release
,
513 .connect
= inet_stream_connect
, /* ok */
514 .socketpair
= sock_no_socketpair
, /* a do nothing */
515 .accept
= inet_accept
, /* ok */
516 .getname
= inet6_getname
,
517 .poll
= tcp_poll
, /* ok */
518 .ioctl
= inet6_ioctl
, /* must change */
519 .listen
= inet_listen
, /* ok */
520 .shutdown
= inet_shutdown
, /* ok */
521 .setsockopt
= sock_common_setsockopt
, /* ok */
522 .getsockopt
= sock_common_getsockopt
, /* ok */
523 .sendmsg
= inet_sendmsg
, /* ok */
524 .recvmsg
= inet_recvmsg
, /* ok */
525 .mmap
= sock_no_mmap
,
526 .sendpage
= inet_sendpage
,
527 .splice_read
= tcp_splice_read
,
529 .compat_setsockopt
= compat_sock_common_setsockopt
,
530 .compat_getsockopt
= compat_sock_common_getsockopt
,
534 const struct proto_ops inet6_dgram_ops
= {
536 .owner
= THIS_MODULE
,
537 .release
= inet6_release
,
539 .connect
= inet_dgram_connect
, /* ok */
540 .socketpair
= sock_no_socketpair
, /* a do nothing */
541 .accept
= sock_no_accept
, /* a do nothing */
542 .getname
= inet6_getname
,
543 .poll
= udp_poll
, /* ok */
544 .ioctl
= inet6_ioctl
, /* must change */
545 .listen
= sock_no_listen
, /* ok */
546 .shutdown
= inet_shutdown
, /* ok */
547 .setsockopt
= sock_common_setsockopt
, /* ok */
548 .getsockopt
= sock_common_getsockopt
, /* ok */
549 .sendmsg
= inet_sendmsg
, /* ok */
550 .recvmsg
= inet_recvmsg
, /* ok */
551 .mmap
= sock_no_mmap
,
552 .sendpage
= sock_no_sendpage
,
554 .compat_setsockopt
= compat_sock_common_setsockopt
,
555 .compat_getsockopt
= compat_sock_common_getsockopt
,
559 static const struct net_proto_family inet6_family_ops
= {
561 .create
= inet6_create
,
562 .owner
= THIS_MODULE
,
565 int inet6_register_protosw(struct inet_protosw
*p
)
567 struct list_head
*lh
;
568 struct inet_protosw
*answer
;
569 struct list_head
*last_perm
;
570 int protocol
= p
->protocol
;
573 spin_lock_bh(&inetsw6_lock
);
576 if (p
->type
>= SOCK_MAX
)
579 /* If we are trying to override a permanent protocol, bail. */
582 last_perm
= &inetsw6
[p
->type
];
583 list_for_each(lh
, &inetsw6
[p
->type
]) {
584 answer
= list_entry(lh
, struct inet_protosw
, list
);
586 /* Check only the non-wild match. */
587 if (INET_PROTOSW_PERMANENT
& answer
->flags
) {
588 if (protocol
== answer
->protocol
)
598 /* Add the new entry after the last permanent entry if any, so that
599 * the new entry does not override a permanent entry when matched with
600 * a wild-card protocol. But it is allowed to override any existing
601 * non-permanent entry. This means that when we remove this entry, the
602 * system automatically returns to the old behavior.
604 list_add_rcu(&p
->list
, last_perm
);
607 spin_unlock_bh(&inetsw6_lock
);
611 pr_err("Attempt to override permanent protocol %d\n", protocol
);
615 pr_err("Ignoring attempt to register invalid socket type %d\n",
619 EXPORT_SYMBOL(inet6_register_protosw
);
622 inet6_unregister_protosw(struct inet_protosw
*p
)
624 if (INET_PROTOSW_PERMANENT
& p
->flags
) {
625 pr_err("Attempt to unregister permanent protocol %d\n",
628 spin_lock_bh(&inetsw6_lock
);
629 list_del_rcu(&p
->list
);
630 spin_unlock_bh(&inetsw6_lock
);
635 EXPORT_SYMBOL(inet6_unregister_protosw
);
637 int inet6_sk_rebuild_header(struct sock
*sk
)
639 struct ipv6_pinfo
*np
= inet6_sk(sk
);
640 struct dst_entry
*dst
;
642 dst
= __sk_dst_check(sk
, np
->dst_cookie
);
645 struct inet_sock
*inet
= inet_sk(sk
);
646 struct in6_addr
*final_p
, final
;
649 memset(&fl6
, 0, sizeof(fl6
));
650 fl6
.flowi6_proto
= sk
->sk_protocol
;
651 fl6
.daddr
= sk
->sk_v6_daddr
;
652 fl6
.saddr
= np
->saddr
;
653 fl6
.flowlabel
= np
->flow_label
;
654 fl6
.flowi6_oif
= sk
->sk_bound_dev_if
;
655 fl6
.flowi6_mark
= sk
->sk_mark
;
656 fl6
.fl6_dport
= inet
->inet_dport
;
657 fl6
.fl6_sport
= inet
->inet_sport
;
658 security_sk_classify_flow(sk
, flowi6_to_flowi(&fl6
));
660 final_p
= fl6_update_dst(&fl6
, np
->opt
, &final
);
662 dst
= ip6_dst_lookup_flow(sk
, &fl6
, final_p
);
664 sk
->sk_route_caps
= 0;
665 sk
->sk_err_soft
= -PTR_ERR(dst
);
669 __ip6_dst_store(sk
, dst
, NULL
, NULL
);
674 EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header
);
676 bool ipv6_opt_accepted(const struct sock
*sk
, const struct sk_buff
*skb
,
677 const struct inet6_skb_parm
*opt
)
679 const struct ipv6_pinfo
*np
= inet6_sk(sk
);
682 if ((opt
->hop
&& (np
->rxopt
.bits
.hopopts
||
683 np
->rxopt
.bits
.ohopopts
)) ||
684 (ip6_flowinfo((struct ipv6hdr
*) skb_network_header(skb
)) &&
685 np
->rxopt
.bits
.rxflow
) ||
686 (opt
->srcrt
&& (np
->rxopt
.bits
.srcrt
||
687 np
->rxopt
.bits
.osrcrt
)) ||
688 ((opt
->dst1
|| opt
->dst0
) &&
689 (np
->rxopt
.bits
.dstopts
|| np
->rxopt
.bits
.odstopts
)))
694 EXPORT_SYMBOL_GPL(ipv6_opt_accepted
);
696 static struct packet_type ipv6_packet_type __read_mostly
= {
697 .type
= cpu_to_be16(ETH_P_IPV6
),
701 static int __init
ipv6_packet_init(void)
703 dev_add_pack(&ipv6_packet_type
);
707 static void ipv6_packet_cleanup(void)
709 dev_remove_pack(&ipv6_packet_type
);
712 static int __net_init
ipv6_init_mibs(struct net
*net
)
716 net
->mib
.udp_stats_in6
= alloc_percpu(struct udp_mib
);
717 if (!net
->mib
.udp_stats_in6
)
719 net
->mib
.udplite_stats_in6
= alloc_percpu(struct udp_mib
);
720 if (!net
->mib
.udplite_stats_in6
)
721 goto err_udplite_mib
;
722 net
->mib
.ipv6_statistics
= alloc_percpu(struct ipstats_mib
);
723 if (!net
->mib
.ipv6_statistics
)
726 for_each_possible_cpu(i
) {
727 struct ipstats_mib
*af_inet6_stats
;
728 af_inet6_stats
= per_cpu_ptr(net
->mib
.ipv6_statistics
, i
);
729 u64_stats_init(&af_inet6_stats
->syncp
);
733 net
->mib
.icmpv6_statistics
= alloc_percpu(struct icmpv6_mib
);
734 if (!net
->mib
.icmpv6_statistics
)
736 net
->mib
.icmpv6msg_statistics
= kzalloc(sizeof(struct icmpv6msg_mib
),
738 if (!net
->mib
.icmpv6msg_statistics
)
739 goto err_icmpmsg_mib
;
743 free_percpu(net
->mib
.icmpv6_statistics
);
745 free_percpu(net
->mib
.ipv6_statistics
);
747 free_percpu(net
->mib
.udplite_stats_in6
);
749 free_percpu(net
->mib
.udp_stats_in6
);
753 static void ipv6_cleanup_mibs(struct net
*net
)
755 free_percpu(net
->mib
.udp_stats_in6
);
756 free_percpu(net
->mib
.udplite_stats_in6
);
757 free_percpu(net
->mib
.ipv6_statistics
);
758 free_percpu(net
->mib
.icmpv6_statistics
);
759 kfree(net
->mib
.icmpv6msg_statistics
);
762 static int __net_init
inet6_net_init(struct net
*net
)
766 net
->ipv6
.sysctl
.bindv6only
= 0;
767 net
->ipv6
.sysctl
.icmpv6_time
= 1*HZ
;
768 net
->ipv6
.sysctl
.flowlabel_consistency
= 1;
769 net
->ipv6
.sysctl
.auto_flowlabels
= 0;
770 net
->ipv6
.sysctl
.idgen_retries
= 3;
771 net
->ipv6
.sysctl
.idgen_delay
= 1 * HZ
;
772 net
->ipv6
.sysctl
.flowlabel_state_ranges
= 1;
773 atomic_set(&net
->ipv6
.fib6_sernum
, 1);
775 err
= ipv6_init_mibs(net
);
778 #ifdef CONFIG_PROC_FS
779 err
= udp6_proc_init(net
);
782 err
= tcp6_proc_init(net
);
785 err
= ac6_proc_init(net
);
791 #ifdef CONFIG_PROC_FS
797 ipv6_cleanup_mibs(net
);
802 static void __net_exit
inet6_net_exit(struct net
*net
)
804 #ifdef CONFIG_PROC_FS
809 ipv6_cleanup_mibs(net
);
812 static struct pernet_operations inet6_net_ops
= {
813 .init
= inet6_net_init
,
814 .exit
= inet6_net_exit
,
817 static const struct ipv6_stub ipv6_stub_impl
= {
818 .ipv6_sock_mc_join
= ipv6_sock_mc_join
,
819 .ipv6_sock_mc_drop
= ipv6_sock_mc_drop
,
820 .ipv6_dst_lookup
= ip6_dst_lookup
,
821 .udpv6_encap_enable
= udpv6_encap_enable
,
822 .ndisc_send_na
= ndisc_send_na
,
826 static int __init
inet6_init(void)
831 sock_skb_cb_check_size(sizeof(struct inet6_skb_parm
));
833 /* Register the socket-side information for inet6_create. */
834 for (r
= &inetsw6
[0]; r
< &inetsw6
[SOCK_MAX
]; ++r
)
837 if (disable_ipv6_mod
) {
838 pr_info("Loaded, but administratively disabled, reboot required to enable\n");
842 err
= proto_register(&tcpv6_prot
, 1);
846 err
= proto_register(&udpv6_prot
, 1);
848 goto out_unregister_tcp_proto
;
850 err
= proto_register(&udplitev6_prot
, 1);
852 goto out_unregister_udp_proto
;
854 err
= proto_register(&rawv6_prot
, 1);
856 goto out_unregister_udplite_proto
;
858 err
= proto_register(&pingv6_prot
, 1);
860 goto out_unregister_ping_proto
;
862 /* We MUST register RAW sockets before we create the ICMP6,
863 * IGMP6, or NDISC control sockets.
867 goto out_unregister_raw_proto
;
869 /* Register the family here so that the init calls below will
870 * be able to create sockets. (?? is this dangerous ??)
872 err
= sock_register(&inet6_family_ops
);
874 goto out_sock_register_fail
;
877 * ipngwg API draft makes clear that the correct semantics
878 * for TCP and UDP is to consider one TCP and UDP instance
879 * in a host available by both INET and INET6 APIs and
880 * able to communicate via both network protocols.
883 err
= register_pernet_subsys(&inet6_net_ops
);
885 goto register_pernet_fail
;
899 ipv6_stub
= &ipv6_stub_impl
;
901 err
= ipv6_netfilter_init();
904 /* Create /proc/foo6 entries. */
905 #ifdef CONFIG_PROC_FS
907 if (raw6_proc_init())
909 if (udplite6_proc_init())
910 goto proc_udplite6_fail
;
911 if (ipv6_misc_proc_init())
912 goto proc_misc6_fail
;
916 err
= ip6_route_init();
919 err
= ndisc_late_init();
921 goto ndisc_late_fail
;
922 err
= ip6_flowlabel_init();
924 goto ip6_flowlabel_fail
;
925 err
= addrconf_init();
929 /* Init v6 extension headers. */
930 err
= ipv6_exthdrs_init();
932 goto ipv6_exthdrs_fail
;
934 err
= ipv6_frag_init();
938 /* Init v6 transport protocols. */
943 err
= udplitev6_init();
951 err
= ipv6_packet_init();
953 goto ipv6_packet_fail
;
960 err
= ipv6_sysctl_register();
972 ipv6_packet_cleanup();
986 ip6_flowlabel_cleanup();
988 ndisc_late_cleanup();
992 #ifdef CONFIG_PROC_FS
995 ipv6_misc_proc_exit();
997 udplite6_proc_exit();
1002 ipv6_netfilter_fini();
1012 unregister_pernet_subsys(&inet6_net_ops
);
1013 register_pernet_fail
:
1014 sock_unregister(PF_INET6
);
1015 rtnl_unregister_all(PF_INET6
);
1016 out_sock_register_fail
:
1018 out_unregister_ping_proto
:
1019 proto_unregister(&pingv6_prot
);
1020 out_unregister_raw_proto
:
1021 proto_unregister(&rawv6_prot
);
1022 out_unregister_udplite_proto
:
1023 proto_unregister(&udplitev6_prot
);
1024 out_unregister_udp_proto
:
1025 proto_unregister(&udpv6_prot
);
1026 out_unregister_tcp_proto
:
1027 proto_unregister(&tcpv6_prot
);
1030 module_init(inet6_init
);
1032 MODULE_ALIAS_NETPROTO(PF_INET6
);