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 if (protocol
< 0 || protocol
>= IPPROTO_MAX
)
115 /* Look for the requested type/protocol pair. */
117 err
= -ESOCKTNOSUPPORT
;
119 list_for_each_entry_rcu(answer
, &inetsw6
[sock
->type
], list
) {
122 /* Check the non-wild match. */
123 if (protocol
== answer
->protocol
) {
124 if (protocol
!= IPPROTO_IP
)
127 /* Check for the two wild cases. */
128 if (IPPROTO_IP
== protocol
) {
129 protocol
= answer
->protocol
;
132 if (IPPROTO_IP
== answer
->protocol
)
135 err
= -EPROTONOSUPPORT
;
139 if (try_loading_module
< 2) {
142 * Be more specific, e.g. net-pf-10-proto-132-type-1
143 * (net-pf-PF_INET6-proto-IPPROTO_SCTP-type-SOCK_STREAM)
145 if (++try_loading_module
== 1)
146 request_module("net-pf-%d-proto-%d-type-%d",
147 PF_INET6
, protocol
, sock
->type
);
149 * Fall back to generic, e.g. net-pf-10-proto-132
150 * (net-pf-PF_INET6-proto-IPPROTO_SCTP)
153 request_module("net-pf-%d-proto-%d",
155 goto lookup_protocol
;
161 if (sock
->type
== SOCK_RAW
&& !kern
&&
162 !ns_capable(net
->user_ns
, CAP_NET_RAW
))
165 sock
->ops
= answer
->ops
;
166 answer_prot
= answer
->prot
;
167 answer_flags
= answer
->flags
;
170 WARN_ON(!answer_prot
->slab
);
173 sk
= sk_alloc(net
, PF_INET6
, GFP_KERNEL
, answer_prot
, kern
);
177 sock_init_data(sock
, sk
);
180 if (INET_PROTOSW_REUSE
& answer_flags
)
181 sk
->sk_reuse
= SK_CAN_REUSE
;
184 inet
->is_icsk
= (INET_PROTOSW_ICSK
& answer_flags
) != 0;
186 if (SOCK_RAW
== sock
->type
) {
187 inet
->inet_num
= protocol
;
188 if (IPPROTO_RAW
== protocol
)
192 sk
->sk_destruct
= inet_sock_destruct
;
193 sk
->sk_family
= PF_INET6
;
194 sk
->sk_protocol
= protocol
;
196 sk
->sk_backlog_rcv
= answer
->prot
->backlog_rcv
;
198 inet_sk(sk
)->pinet6
= np
= inet6_sk_generic(sk
);
200 np
->mcast_hops
= IPV6_DEFAULT_MCASTHOPS
;
202 np
->pmtudisc
= IPV6_PMTUDISC_WANT
;
203 np
->autoflowlabel
= ip6_default_np_autolabel(sock_net(sk
));
204 sk
->sk_ipv6only
= net
->ipv6
.sysctl
.bindv6only
;
206 /* Init the ipv4 part of the socket since we can have sockets
207 * using v6 API for ipv4.
214 inet
->mc_list
= NULL
;
217 if (net
->ipv4
.sysctl_ip_no_pmtu_disc
)
218 inet
->pmtudisc
= IP_PMTUDISC_DONT
;
220 inet
->pmtudisc
= IP_PMTUDISC_WANT
;
222 * Increment only the relevant sk_prot->socks debug field, this changes
223 * the previous behaviour of incrementing both the equivalent to
224 * answer->prot->socks (inet6_sock_nr) and inet_sock_nr.
226 * This allows better debug granularity as we'll know exactly how many
227 * UDPv6, TCPv6, etc socks were allocated, not the sum of all IPv6
228 * transport protocol socks. -acme
230 sk_refcnt_debug_inc(sk
);
232 if (inet
->inet_num
) {
233 /* It assumes that any protocol which allows
234 * the user to assign a number at socket
235 * creation time automatically shares.
237 inet
->inet_sport
= htons(inet
->inet_num
);
238 err
= sk
->sk_prot
->hash(sk
);
240 sk_common_release(sk
);
244 if (sk
->sk_prot
->init
) {
245 err
= sk
->sk_prot
->init(sk
);
247 sk_common_release(sk
);
259 /* bind for INET6 API */
260 int inet6_bind(struct socket
*sock
, struct sockaddr
*uaddr
, int addr_len
)
262 struct sockaddr_in6
*addr
= (struct sockaddr_in6
*)uaddr
;
263 struct sock
*sk
= sock
->sk
;
264 struct inet_sock
*inet
= inet_sk(sk
);
265 struct ipv6_pinfo
*np
= inet6_sk(sk
);
266 struct net
*net
= sock_net(sk
);
272 /* If the socket has its own bind function then use it. */
273 if (sk
->sk_prot
->bind
)
274 return sk
->sk_prot
->bind(sk
, uaddr
, addr_len
);
276 if (addr_len
< SIN6_LEN_RFC2133
)
279 if (addr
->sin6_family
!= AF_INET6
)
280 return -EAFNOSUPPORT
;
282 addr_type
= ipv6_addr_type(&addr
->sin6_addr
);
283 if ((addr_type
& IPV6_ADDR_MULTICAST
) && sock
->type
== SOCK_STREAM
)
286 snum
= ntohs(addr
->sin6_port
);
287 if (snum
&& snum
< PROT_SOCK
&& !ns_capable(net
->user_ns
, CAP_NET_BIND_SERVICE
))
292 /* Check these errors (active socket, double bind). */
293 if (sk
->sk_state
!= TCP_CLOSE
|| inet
->inet_num
) {
298 /* Check if the address belongs to the host. */
299 if (addr_type
== IPV6_ADDR_MAPPED
) {
302 /* Binding to v4-mapped address on a v6-only socket
305 if (sk
->sk_ipv6only
) {
310 /* Reproduce AF_INET checks to make the bindings consistent */
311 v4addr
= addr
->sin6_addr
.s6_addr32
[3];
312 chk_addr_ret
= inet_addr_type(net
, v4addr
);
313 if (!net
->ipv4
.sysctl_ip_nonlocal_bind
&&
314 !(inet
->freebind
|| inet
->transparent
) &&
315 v4addr
!= htonl(INADDR_ANY
) &&
316 chk_addr_ret
!= RTN_LOCAL
&&
317 chk_addr_ret
!= RTN_MULTICAST
&&
318 chk_addr_ret
!= RTN_BROADCAST
) {
319 err
= -EADDRNOTAVAIL
;
323 if (addr_type
!= IPV6_ADDR_ANY
) {
324 struct net_device
*dev
= NULL
;
327 if (__ipv6_addr_needs_scope_id(addr_type
)) {
328 if (addr_len
>= sizeof(struct sockaddr_in6
) &&
329 addr
->sin6_scope_id
) {
330 /* Override any existing binding, if another one
331 * is supplied by user.
333 sk
->sk_bound_dev_if
= addr
->sin6_scope_id
;
336 /* Binding to link-local address requires an interface */
337 if (!sk
->sk_bound_dev_if
) {
341 dev
= dev_get_by_index_rcu(net
, sk
->sk_bound_dev_if
);
348 /* ipv4 addr of the socket is invalid. Only the
349 * unspecified and mapped address have a v4 equivalent.
351 v4addr
= LOOPBACK4_IPV6
;
352 if (!(addr_type
& IPV6_ADDR_MULTICAST
)) {
353 if (!net
->ipv6
.sysctl
.ip_nonlocal_bind
&&
354 !(inet
->freebind
|| inet
->transparent
) &&
355 !ipv6_chk_addr(net
, &addr
->sin6_addr
,
357 err
= -EADDRNOTAVAIL
;
365 inet
->inet_rcv_saddr
= v4addr
;
366 inet
->inet_saddr
= v4addr
;
368 sk
->sk_v6_rcv_saddr
= addr
->sin6_addr
;
370 if (!(addr_type
& IPV6_ADDR_MULTICAST
))
371 np
->saddr
= addr
->sin6_addr
;
373 /* Make sure we are allowed to bind here. */
374 if ((snum
|| !inet
->bind_address_no_port
) &&
375 sk
->sk_prot
->get_port(sk
, snum
)) {
376 inet_reset_saddr(sk
);
381 if (addr_type
!= IPV6_ADDR_ANY
) {
382 sk
->sk_userlocks
|= SOCK_BINDADDR_LOCK
;
383 if (addr_type
!= IPV6_ADDR_MAPPED
)
387 sk
->sk_userlocks
|= SOCK_BINDPORT_LOCK
;
388 inet
->inet_sport
= htons(inet
->inet_num
);
389 inet
->inet_dport
= 0;
390 inet
->inet_daddr
= 0;
398 EXPORT_SYMBOL(inet6_bind
);
400 int inet6_release(struct socket
*sock
)
402 struct sock
*sk
= sock
->sk
;
408 ipv6_sock_mc_close(sk
);
411 ipv6_sock_ac_close(sk
);
413 return inet_release(sock
);
415 EXPORT_SYMBOL(inet6_release
);
417 void inet6_destroy_sock(struct sock
*sk
)
419 struct ipv6_pinfo
*np
= inet6_sk(sk
);
421 struct ipv6_txoptions
*opt
;
423 /* Release rx options */
425 skb
= xchg(&np
->pktoptions
, NULL
);
429 skb
= xchg(&np
->rxpmtu
, NULL
);
433 /* Free flowlabels */
434 fl6_free_socklist(sk
);
436 /* Free tx options */
438 opt
= xchg((__force
struct ipv6_txoptions
**)&np
->opt
, NULL
);
440 atomic_sub(opt
->tot_len
, &sk
->sk_omem_alloc
);
444 EXPORT_SYMBOL_GPL(inet6_destroy_sock
);
447 * This does both peername and sockname.
450 int inet6_getname(struct socket
*sock
, struct sockaddr
*uaddr
,
451 int *uaddr_len
, int peer
)
453 struct sockaddr_in6
*sin
= (struct sockaddr_in6
*)uaddr
;
454 struct sock
*sk
= sock
->sk
;
455 struct inet_sock
*inet
= inet_sk(sk
);
456 struct ipv6_pinfo
*np
= inet6_sk(sk
);
458 sin
->sin6_family
= AF_INET6
;
459 sin
->sin6_flowinfo
= 0;
460 sin
->sin6_scope_id
= 0;
462 if (!inet
->inet_dport
)
464 if (((1 << sk
->sk_state
) & (TCPF_CLOSE
| TCPF_SYN_SENT
)) &&
467 sin
->sin6_port
= inet
->inet_dport
;
468 sin
->sin6_addr
= sk
->sk_v6_daddr
;
470 sin
->sin6_flowinfo
= np
->flow_label
;
472 if (ipv6_addr_any(&sk
->sk_v6_rcv_saddr
))
473 sin
->sin6_addr
= np
->saddr
;
475 sin
->sin6_addr
= sk
->sk_v6_rcv_saddr
;
477 sin
->sin6_port
= inet
->inet_sport
;
479 sin
->sin6_scope_id
= ipv6_iface_scope_id(&sin
->sin6_addr
,
480 sk
->sk_bound_dev_if
);
481 *uaddr_len
= sizeof(*sin
);
484 EXPORT_SYMBOL(inet6_getname
);
486 int inet6_ioctl(struct socket
*sock
, unsigned int cmd
, unsigned long arg
)
488 struct sock
*sk
= sock
->sk
;
489 struct net
*net
= sock_net(sk
);
493 return sock_get_timestamp(sk
, (struct timeval __user
*)arg
);
496 return sock_get_timestampns(sk
, (struct timespec __user
*)arg
);
501 return ipv6_route_ioctl(net
, cmd
, (void __user
*)arg
);
504 return addrconf_add_ifaddr(net
, (void __user
*) arg
);
506 return addrconf_del_ifaddr(net
, (void __user
*) arg
);
508 return addrconf_set_dstaddr(net
, (void __user
*) arg
);
510 if (!sk
->sk_prot
->ioctl
)
512 return sk
->sk_prot
->ioctl(sk
, cmd
, arg
);
517 EXPORT_SYMBOL(inet6_ioctl
);
519 const struct proto_ops inet6_stream_ops
= {
521 .owner
= THIS_MODULE
,
522 .release
= inet6_release
,
524 .connect
= inet_stream_connect
, /* ok */
525 .socketpair
= sock_no_socketpair
, /* a do nothing */
526 .accept
= inet_accept
, /* ok */
527 .getname
= inet6_getname
,
528 .poll
= tcp_poll
, /* ok */
529 .ioctl
= inet6_ioctl
, /* must change */
530 .listen
= inet_listen
, /* ok */
531 .shutdown
= inet_shutdown
, /* ok */
532 .setsockopt
= sock_common_setsockopt
, /* ok */
533 .getsockopt
= sock_common_getsockopt
, /* ok */
534 .sendmsg
= inet_sendmsg
, /* ok */
535 .recvmsg
= inet_recvmsg
, /* ok */
536 .mmap
= sock_no_mmap
,
537 .sendpage
= inet_sendpage
,
538 .splice_read
= tcp_splice_read
,
540 .compat_setsockopt
= compat_sock_common_setsockopt
,
541 .compat_getsockopt
= compat_sock_common_getsockopt
,
545 const struct proto_ops inet6_dgram_ops
= {
547 .owner
= THIS_MODULE
,
548 .release
= inet6_release
,
550 .connect
= inet_dgram_connect
, /* ok */
551 .socketpair
= sock_no_socketpair
, /* a do nothing */
552 .accept
= sock_no_accept
, /* a do nothing */
553 .getname
= inet6_getname
,
554 .poll
= udp_poll
, /* ok */
555 .ioctl
= inet6_ioctl
, /* must change */
556 .listen
= sock_no_listen
, /* ok */
557 .shutdown
= inet_shutdown
, /* ok */
558 .setsockopt
= sock_common_setsockopt
, /* ok */
559 .getsockopt
= sock_common_getsockopt
, /* ok */
560 .sendmsg
= inet_sendmsg
, /* ok */
561 .recvmsg
= inet_recvmsg
, /* ok */
562 .mmap
= sock_no_mmap
,
563 .sendpage
= sock_no_sendpage
,
565 .compat_setsockopt
= compat_sock_common_setsockopt
,
566 .compat_getsockopt
= compat_sock_common_getsockopt
,
570 static const struct net_proto_family inet6_family_ops
= {
572 .create
= inet6_create
,
573 .owner
= THIS_MODULE
,
576 int inet6_register_protosw(struct inet_protosw
*p
)
578 struct list_head
*lh
;
579 struct inet_protosw
*answer
;
580 struct list_head
*last_perm
;
581 int protocol
= p
->protocol
;
584 spin_lock_bh(&inetsw6_lock
);
587 if (p
->type
>= SOCK_MAX
)
590 /* If we are trying to override a permanent protocol, bail. */
593 last_perm
= &inetsw6
[p
->type
];
594 list_for_each(lh
, &inetsw6
[p
->type
]) {
595 answer
= list_entry(lh
, struct inet_protosw
, list
);
597 /* Check only the non-wild match. */
598 if (INET_PROTOSW_PERMANENT
& answer
->flags
) {
599 if (protocol
== answer
->protocol
)
609 /* Add the new entry after the last permanent entry if any, so that
610 * the new entry does not override a permanent entry when matched with
611 * a wild-card protocol. But it is allowed to override any existing
612 * non-permanent entry. This means that when we remove this entry, the
613 * system automatically returns to the old behavior.
615 list_add_rcu(&p
->list
, last_perm
);
618 spin_unlock_bh(&inetsw6_lock
);
622 pr_err("Attempt to override permanent protocol %d\n", protocol
);
626 pr_err("Ignoring attempt to register invalid socket type %d\n",
630 EXPORT_SYMBOL(inet6_register_protosw
);
633 inet6_unregister_protosw(struct inet_protosw
*p
)
635 if (INET_PROTOSW_PERMANENT
& p
->flags
) {
636 pr_err("Attempt to unregister permanent protocol %d\n",
639 spin_lock_bh(&inetsw6_lock
);
640 list_del_rcu(&p
->list
);
641 spin_unlock_bh(&inetsw6_lock
);
646 EXPORT_SYMBOL(inet6_unregister_protosw
);
648 int inet6_sk_rebuild_header(struct sock
*sk
)
650 struct ipv6_pinfo
*np
= inet6_sk(sk
);
651 struct dst_entry
*dst
;
653 dst
= __sk_dst_check(sk
, np
->dst_cookie
);
656 struct inet_sock
*inet
= inet_sk(sk
);
657 struct in6_addr
*final_p
, final
;
660 memset(&fl6
, 0, sizeof(fl6
));
661 fl6
.flowi6_proto
= sk
->sk_protocol
;
662 fl6
.daddr
= sk
->sk_v6_daddr
;
663 fl6
.saddr
= np
->saddr
;
664 fl6
.flowlabel
= np
->flow_label
;
665 fl6
.flowi6_oif
= sk
->sk_bound_dev_if
;
666 fl6
.flowi6_mark
= sk
->sk_mark
;
667 fl6
.fl6_dport
= inet
->inet_dport
;
668 fl6
.fl6_sport
= inet
->inet_sport
;
669 security_sk_classify_flow(sk
, flowi6_to_flowi(&fl6
));
672 final_p
= fl6_update_dst(&fl6
, rcu_dereference(np
->opt
),
676 dst
= ip6_dst_lookup_flow(sk
, &fl6
, final_p
);
678 sk
->sk_route_caps
= 0;
679 sk
->sk_err_soft
= -PTR_ERR(dst
);
683 ip6_dst_store(sk
, dst
, NULL
, NULL
);
688 EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header
);
690 bool ipv6_opt_accepted(const struct sock
*sk
, const struct sk_buff
*skb
,
691 const struct inet6_skb_parm
*opt
)
693 const struct ipv6_pinfo
*np
= inet6_sk(sk
);
696 if (((opt
->flags
& IP6SKB_HOPBYHOP
) &&
697 (np
->rxopt
.bits
.hopopts
|| np
->rxopt
.bits
.ohopopts
)) ||
698 (ip6_flowinfo((struct ipv6hdr
*) skb_network_header(skb
)) &&
699 np
->rxopt
.bits
.rxflow
) ||
700 (opt
->srcrt
&& (np
->rxopt
.bits
.srcrt
||
701 np
->rxopt
.bits
.osrcrt
)) ||
702 ((opt
->dst1
|| opt
->dst0
) &&
703 (np
->rxopt
.bits
.dstopts
|| np
->rxopt
.bits
.odstopts
)))
708 EXPORT_SYMBOL_GPL(ipv6_opt_accepted
);
710 static struct packet_type ipv6_packet_type __read_mostly
= {
711 .type
= cpu_to_be16(ETH_P_IPV6
),
715 static int __init
ipv6_packet_init(void)
717 dev_add_pack(&ipv6_packet_type
);
721 static void ipv6_packet_cleanup(void)
723 dev_remove_pack(&ipv6_packet_type
);
726 static int __net_init
ipv6_init_mibs(struct net
*net
)
730 net
->mib
.udp_stats_in6
= alloc_percpu(struct udp_mib
);
731 if (!net
->mib
.udp_stats_in6
)
733 net
->mib
.udplite_stats_in6
= alloc_percpu(struct udp_mib
);
734 if (!net
->mib
.udplite_stats_in6
)
735 goto err_udplite_mib
;
736 net
->mib
.ipv6_statistics
= alloc_percpu(struct ipstats_mib
);
737 if (!net
->mib
.ipv6_statistics
)
740 for_each_possible_cpu(i
) {
741 struct ipstats_mib
*af_inet6_stats
;
742 af_inet6_stats
= per_cpu_ptr(net
->mib
.ipv6_statistics
, i
);
743 u64_stats_init(&af_inet6_stats
->syncp
);
747 net
->mib
.icmpv6_statistics
= alloc_percpu(struct icmpv6_mib
);
748 if (!net
->mib
.icmpv6_statistics
)
750 net
->mib
.icmpv6msg_statistics
= kzalloc(sizeof(struct icmpv6msg_mib
),
752 if (!net
->mib
.icmpv6msg_statistics
)
753 goto err_icmpmsg_mib
;
757 free_percpu(net
->mib
.icmpv6_statistics
);
759 free_percpu(net
->mib
.ipv6_statistics
);
761 free_percpu(net
->mib
.udplite_stats_in6
);
763 free_percpu(net
->mib
.udp_stats_in6
);
767 static void ipv6_cleanup_mibs(struct net
*net
)
769 free_percpu(net
->mib
.udp_stats_in6
);
770 free_percpu(net
->mib
.udplite_stats_in6
);
771 free_percpu(net
->mib
.ipv6_statistics
);
772 free_percpu(net
->mib
.icmpv6_statistics
);
773 kfree(net
->mib
.icmpv6msg_statistics
);
776 static int __net_init
inet6_net_init(struct net
*net
)
780 net
->ipv6
.sysctl
.bindv6only
= 0;
781 net
->ipv6
.sysctl
.icmpv6_time
= 1*HZ
;
782 net
->ipv6
.sysctl
.flowlabel_consistency
= 1;
783 net
->ipv6
.sysctl
.auto_flowlabels
= IP6_DEFAULT_AUTO_FLOW_LABELS
;
784 net
->ipv6
.sysctl
.idgen_retries
= 3;
785 net
->ipv6
.sysctl
.idgen_delay
= 1 * HZ
;
786 net
->ipv6
.sysctl
.flowlabel_state_ranges
= 0;
787 atomic_set(&net
->ipv6
.fib6_sernum
, 1);
789 err
= ipv6_init_mibs(net
);
792 #ifdef CONFIG_PROC_FS
793 err
= udp6_proc_init(net
);
796 err
= tcp6_proc_init(net
);
799 err
= ac6_proc_init(net
);
805 #ifdef CONFIG_PROC_FS
811 ipv6_cleanup_mibs(net
);
816 static void __net_exit
inet6_net_exit(struct net
*net
)
818 #ifdef CONFIG_PROC_FS
823 ipv6_cleanup_mibs(net
);
826 static struct pernet_operations inet6_net_ops
= {
827 .init
= inet6_net_init
,
828 .exit
= inet6_net_exit
,
831 static const struct ipv6_stub ipv6_stub_impl
= {
832 .ipv6_sock_mc_join
= ipv6_sock_mc_join
,
833 .ipv6_sock_mc_drop
= ipv6_sock_mc_drop
,
834 .ipv6_dst_lookup
= ip6_dst_lookup
,
835 .udpv6_encap_enable
= udpv6_encap_enable
,
836 .ndisc_send_na
= ndisc_send_na
,
840 static int __init
inet6_init(void)
845 sock_skb_cb_check_size(sizeof(struct inet6_skb_parm
));
847 /* Register the socket-side information for inet6_create. */
848 for (r
= &inetsw6
[0]; r
< &inetsw6
[SOCK_MAX
]; ++r
)
851 if (disable_ipv6_mod
) {
852 pr_info("Loaded, but administratively disabled, reboot required to enable\n");
856 err
= proto_register(&tcpv6_prot
, 1);
860 err
= proto_register(&udpv6_prot
, 1);
862 goto out_unregister_tcp_proto
;
864 err
= proto_register(&udplitev6_prot
, 1);
866 goto out_unregister_udp_proto
;
868 err
= proto_register(&rawv6_prot
, 1);
870 goto out_unregister_udplite_proto
;
872 err
= proto_register(&pingv6_prot
, 1);
874 goto out_unregister_ping_proto
;
876 /* We MUST register RAW sockets before we create the ICMP6,
877 * IGMP6, or NDISC control sockets.
881 goto out_unregister_raw_proto
;
883 /* Register the family here so that the init calls below will
884 * be able to create sockets. (?? is this dangerous ??)
886 err
= sock_register(&inet6_family_ops
);
888 goto out_sock_register_fail
;
891 * ipngwg API draft makes clear that the correct semantics
892 * for TCP and UDP is to consider one TCP and UDP instance
893 * in a host available by both INET and INET6 APIs and
894 * able to communicate via both network protocols.
897 err
= register_pernet_subsys(&inet6_net_ops
);
899 goto register_pernet_fail
;
913 ipv6_stub
= &ipv6_stub_impl
;
915 err
= ipv6_netfilter_init();
918 /* Create /proc/foo6 entries. */
919 #ifdef CONFIG_PROC_FS
921 if (raw6_proc_init())
923 if (udplite6_proc_init())
924 goto proc_udplite6_fail
;
925 if (ipv6_misc_proc_init())
926 goto proc_misc6_fail
;
930 err
= ip6_route_init();
933 err
= ndisc_late_init();
935 goto ndisc_late_fail
;
936 err
= ip6_flowlabel_init();
938 goto ip6_flowlabel_fail
;
939 err
= addrconf_init();
943 /* Init v6 extension headers. */
944 err
= ipv6_exthdrs_init();
946 goto ipv6_exthdrs_fail
;
948 err
= ipv6_frag_init();
952 /* Init v6 transport protocols. */
957 err
= udplitev6_init();
965 err
= ipv6_packet_init();
967 goto ipv6_packet_fail
;
974 err
= ipv6_sysctl_register();
986 ipv6_packet_cleanup();
1000 ip6_flowlabel_cleanup();
1002 ndisc_late_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 MODULE_ALIAS_NETPROTO(PF_INET6
);