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>
63 #include <net/calipso.h>
65 #include <asm/uaccess.h>
66 #include <linux/mroute6.h>
68 #include "ip6_offload.h"
70 MODULE_AUTHOR("Cast of dozens");
71 MODULE_DESCRIPTION("IPv6 protocol stack for Linux");
72 MODULE_LICENSE("GPL");
74 /* The inetsw6 table contains everything that inet6_create needs to
77 static struct list_head inetsw6
[SOCK_MAX
];
78 static DEFINE_SPINLOCK(inetsw6_lock
);
80 struct ipv6_params ipv6_defaults
= {
85 static int disable_ipv6_mod
;
87 module_param_named(disable
, disable_ipv6_mod
, int, 0444);
88 MODULE_PARM_DESC(disable
, "Disable IPv6 module such that it is non-functional");
90 module_param_named(disable_ipv6
, ipv6_defaults
.disable_ipv6
, int, 0444);
91 MODULE_PARM_DESC(disable_ipv6
, "Disable IPv6 on all interfaces");
93 module_param_named(autoconf
, ipv6_defaults
.autoconf
, int, 0444);
94 MODULE_PARM_DESC(autoconf
, "Enable IPv6 address autoconfiguration on all interfaces");
96 static __inline__
struct ipv6_pinfo
*inet6_sk_generic(struct sock
*sk
)
98 const int offset
= sk
->sk_prot
->obj_size
- sizeof(struct ipv6_pinfo
);
100 return (struct ipv6_pinfo
*)(((u8
*)sk
) + offset
);
103 static int inet6_create(struct net
*net
, struct socket
*sock
, int protocol
,
106 struct inet_sock
*inet
;
107 struct ipv6_pinfo
*np
;
109 struct inet_protosw
*answer
;
110 struct proto
*answer_prot
;
111 unsigned char answer_flags
;
112 int try_loading_module
= 0;
115 if (protocol
< 0 || protocol
>= IPPROTO_MAX
)
118 /* Look for the requested type/protocol pair. */
120 err
= -ESOCKTNOSUPPORT
;
122 list_for_each_entry_rcu(answer
, &inetsw6
[sock
->type
], list
) {
125 /* Check the non-wild match. */
126 if (protocol
== answer
->protocol
) {
127 if (protocol
!= IPPROTO_IP
)
130 /* Check for the two wild cases. */
131 if (IPPROTO_IP
== protocol
) {
132 protocol
= answer
->protocol
;
135 if (IPPROTO_IP
== answer
->protocol
)
138 err
= -EPROTONOSUPPORT
;
142 if (try_loading_module
< 2) {
145 * Be more specific, e.g. net-pf-10-proto-132-type-1
146 * (net-pf-PF_INET6-proto-IPPROTO_SCTP-type-SOCK_STREAM)
148 if (++try_loading_module
== 1)
149 request_module("net-pf-%d-proto-%d-type-%d",
150 PF_INET6
, protocol
, sock
->type
);
152 * Fall back to generic, e.g. net-pf-10-proto-132
153 * (net-pf-PF_INET6-proto-IPPROTO_SCTP)
156 request_module("net-pf-%d-proto-%d",
158 goto lookup_protocol
;
164 if (sock
->type
== SOCK_RAW
&& !kern
&&
165 !ns_capable(net
->user_ns
, CAP_NET_RAW
))
168 sock
->ops
= answer
->ops
;
169 answer_prot
= answer
->prot
;
170 answer_flags
= answer
->flags
;
173 WARN_ON(!answer_prot
->slab
);
176 sk
= sk_alloc(net
, PF_INET6
, GFP_KERNEL
, answer_prot
, kern
);
180 sock_init_data(sock
, sk
);
183 if (INET_PROTOSW_REUSE
& answer_flags
)
184 sk
->sk_reuse
= SK_CAN_REUSE
;
187 inet
->is_icsk
= (INET_PROTOSW_ICSK
& answer_flags
) != 0;
189 if (SOCK_RAW
== sock
->type
) {
190 inet
->inet_num
= protocol
;
191 if (IPPROTO_RAW
== protocol
)
195 sk
->sk_destruct
= inet_sock_destruct
;
196 sk
->sk_family
= PF_INET6
;
197 sk
->sk_protocol
= protocol
;
199 sk
->sk_backlog_rcv
= answer
->prot
->backlog_rcv
;
201 inet_sk(sk
)->pinet6
= np
= inet6_sk_generic(sk
);
203 np
->mcast_hops
= IPV6_DEFAULT_MCASTHOPS
;
205 np
->pmtudisc
= IPV6_PMTUDISC_WANT
;
206 np
->autoflowlabel
= ip6_default_np_autolabel(sock_net(sk
));
207 sk
->sk_ipv6only
= net
->ipv6
.sysctl
.bindv6only
;
209 /* Init the ipv4 part of the socket since we can have sockets
210 * using v6 API for ipv4.
217 inet
->mc_list
= NULL
;
220 if (net
->ipv4
.sysctl_ip_no_pmtu_disc
)
221 inet
->pmtudisc
= IP_PMTUDISC_DONT
;
223 inet
->pmtudisc
= IP_PMTUDISC_WANT
;
225 * Increment only the relevant sk_prot->socks debug field, this changes
226 * the previous behaviour of incrementing both the equivalent to
227 * answer->prot->socks (inet6_sock_nr) and inet_sock_nr.
229 * This allows better debug granularity as we'll know exactly how many
230 * UDPv6, TCPv6, etc socks were allocated, not the sum of all IPv6
231 * transport protocol socks. -acme
233 sk_refcnt_debug_inc(sk
);
235 if (inet
->inet_num
) {
236 /* It assumes that any protocol which allows
237 * the user to assign a number at socket
238 * creation time automatically shares.
240 inet
->inet_sport
= htons(inet
->inet_num
);
241 err
= sk
->sk_prot
->hash(sk
);
243 sk_common_release(sk
);
247 if (sk
->sk_prot
->init
) {
248 err
= sk
->sk_prot
->init(sk
);
250 sk_common_release(sk
);
262 /* bind for INET6 API */
263 int inet6_bind(struct socket
*sock
, struct sockaddr
*uaddr
, int addr_len
)
265 struct sockaddr_in6
*addr
= (struct sockaddr_in6
*)uaddr
;
266 struct sock
*sk
= sock
->sk
;
267 struct inet_sock
*inet
= inet_sk(sk
);
268 struct ipv6_pinfo
*np
= inet6_sk(sk
);
269 struct net
*net
= sock_net(sk
);
275 /* If the socket has its own bind function then use it. */
276 if (sk
->sk_prot
->bind
)
277 return sk
->sk_prot
->bind(sk
, uaddr
, addr_len
);
279 if (addr_len
< SIN6_LEN_RFC2133
)
282 if (addr
->sin6_family
!= AF_INET6
)
283 return -EAFNOSUPPORT
;
285 addr_type
= ipv6_addr_type(&addr
->sin6_addr
);
286 if ((addr_type
& IPV6_ADDR_MULTICAST
) && sock
->type
== SOCK_STREAM
)
289 snum
= ntohs(addr
->sin6_port
);
290 if (snum
&& snum
< PROT_SOCK
&& !ns_capable(net
->user_ns
, CAP_NET_BIND_SERVICE
))
295 /* Check these errors (active socket, double bind). */
296 if (sk
->sk_state
!= TCP_CLOSE
|| inet
->inet_num
) {
301 /* Check if the address belongs to the host. */
302 if (addr_type
== IPV6_ADDR_MAPPED
) {
305 /* Binding to v4-mapped address on a v6-only socket
308 if (sk
->sk_ipv6only
) {
313 /* Reproduce AF_INET checks to make the bindings consistent */
314 v4addr
= addr
->sin6_addr
.s6_addr32
[3];
315 chk_addr_ret
= inet_addr_type(net
, v4addr
);
316 if (!net
->ipv4
.sysctl_ip_nonlocal_bind
&&
317 !(inet
->freebind
|| inet
->transparent
) &&
318 v4addr
!= htonl(INADDR_ANY
) &&
319 chk_addr_ret
!= RTN_LOCAL
&&
320 chk_addr_ret
!= RTN_MULTICAST
&&
321 chk_addr_ret
!= RTN_BROADCAST
) {
322 err
= -EADDRNOTAVAIL
;
326 if (addr_type
!= IPV6_ADDR_ANY
) {
327 struct net_device
*dev
= NULL
;
330 if (__ipv6_addr_needs_scope_id(addr_type
)) {
331 if (addr_len
>= sizeof(struct sockaddr_in6
) &&
332 addr
->sin6_scope_id
) {
333 /* Override any existing binding, if another one
334 * is supplied by user.
336 sk
->sk_bound_dev_if
= addr
->sin6_scope_id
;
339 /* Binding to link-local address requires an interface */
340 if (!sk
->sk_bound_dev_if
) {
344 dev
= dev_get_by_index_rcu(net
, sk
->sk_bound_dev_if
);
351 /* ipv4 addr of the socket is invalid. Only the
352 * unspecified and mapped address have a v4 equivalent.
354 v4addr
= LOOPBACK4_IPV6
;
355 if (!(addr_type
& IPV6_ADDR_MULTICAST
)) {
356 if (!net
->ipv6
.sysctl
.ip_nonlocal_bind
&&
357 !(inet
->freebind
|| inet
->transparent
) &&
358 !ipv6_chk_addr(net
, &addr
->sin6_addr
,
360 err
= -EADDRNOTAVAIL
;
368 inet
->inet_rcv_saddr
= v4addr
;
369 inet
->inet_saddr
= v4addr
;
371 sk
->sk_v6_rcv_saddr
= addr
->sin6_addr
;
373 if (!(addr_type
& IPV6_ADDR_MULTICAST
))
374 np
->saddr
= addr
->sin6_addr
;
376 /* Make sure we are allowed to bind here. */
377 if ((snum
|| !inet
->bind_address_no_port
) &&
378 sk
->sk_prot
->get_port(sk
, snum
)) {
379 inet_reset_saddr(sk
);
384 if (addr_type
!= IPV6_ADDR_ANY
) {
385 sk
->sk_userlocks
|= SOCK_BINDADDR_LOCK
;
386 if (addr_type
!= IPV6_ADDR_MAPPED
)
390 sk
->sk_userlocks
|= SOCK_BINDPORT_LOCK
;
391 inet
->inet_sport
= htons(inet
->inet_num
);
392 inet
->inet_dport
= 0;
393 inet
->inet_daddr
= 0;
401 EXPORT_SYMBOL(inet6_bind
);
403 int inet6_release(struct socket
*sock
)
405 struct sock
*sk
= sock
->sk
;
411 ipv6_sock_mc_close(sk
);
414 ipv6_sock_ac_close(sk
);
416 return inet_release(sock
);
418 EXPORT_SYMBOL(inet6_release
);
420 void inet6_destroy_sock(struct sock
*sk
)
422 struct ipv6_pinfo
*np
= inet6_sk(sk
);
424 struct ipv6_txoptions
*opt
;
426 /* Release rx options */
428 skb
= xchg(&np
->pktoptions
, NULL
);
432 skb
= xchg(&np
->rxpmtu
, NULL
);
436 /* Free flowlabels */
437 fl6_free_socklist(sk
);
439 /* Free tx options */
441 opt
= xchg((__force
struct ipv6_txoptions
**)&np
->opt
, NULL
);
443 atomic_sub(opt
->tot_len
, &sk
->sk_omem_alloc
);
447 EXPORT_SYMBOL_GPL(inet6_destroy_sock
);
450 * This does both peername and sockname.
453 int inet6_getname(struct socket
*sock
, struct sockaddr
*uaddr
,
454 int *uaddr_len
, int peer
)
456 struct sockaddr_in6
*sin
= (struct sockaddr_in6
*)uaddr
;
457 struct sock
*sk
= sock
->sk
;
458 struct inet_sock
*inet
= inet_sk(sk
);
459 struct ipv6_pinfo
*np
= inet6_sk(sk
);
461 sin
->sin6_family
= AF_INET6
;
462 sin
->sin6_flowinfo
= 0;
463 sin
->sin6_scope_id
= 0;
465 if (!inet
->inet_dport
)
467 if (((1 << sk
->sk_state
) & (TCPF_CLOSE
| TCPF_SYN_SENT
)) &&
470 sin
->sin6_port
= inet
->inet_dport
;
471 sin
->sin6_addr
= sk
->sk_v6_daddr
;
473 sin
->sin6_flowinfo
= np
->flow_label
;
475 if (ipv6_addr_any(&sk
->sk_v6_rcv_saddr
))
476 sin
->sin6_addr
= np
->saddr
;
478 sin
->sin6_addr
= sk
->sk_v6_rcv_saddr
;
480 sin
->sin6_port
= inet
->inet_sport
;
482 sin
->sin6_scope_id
= ipv6_iface_scope_id(&sin
->sin6_addr
,
483 sk
->sk_bound_dev_if
);
484 *uaddr_len
= sizeof(*sin
);
487 EXPORT_SYMBOL(inet6_getname
);
489 int inet6_ioctl(struct socket
*sock
, unsigned int cmd
, unsigned long arg
)
491 struct sock
*sk
= sock
->sk
;
492 struct net
*net
= sock_net(sk
);
496 return sock_get_timestamp(sk
, (struct timeval __user
*)arg
);
499 return sock_get_timestampns(sk
, (struct timespec __user
*)arg
);
504 return ipv6_route_ioctl(net
, cmd
, (void __user
*)arg
);
507 return addrconf_add_ifaddr(net
, (void __user
*) arg
);
509 return addrconf_del_ifaddr(net
, (void __user
*) arg
);
511 return addrconf_set_dstaddr(net
, (void __user
*) arg
);
513 if (!sk
->sk_prot
->ioctl
)
515 return sk
->sk_prot
->ioctl(sk
, cmd
, arg
);
520 EXPORT_SYMBOL(inet6_ioctl
);
522 const struct proto_ops inet6_stream_ops
= {
524 .owner
= THIS_MODULE
,
525 .release
= inet6_release
,
527 .connect
= inet_stream_connect
, /* ok */
528 .socketpair
= sock_no_socketpair
, /* a do nothing */
529 .accept
= inet_accept
, /* ok */
530 .getname
= inet6_getname
,
531 .poll
= tcp_poll
, /* ok */
532 .ioctl
= inet6_ioctl
, /* must change */
533 .listen
= inet_listen
, /* ok */
534 .shutdown
= inet_shutdown
, /* ok */
535 .setsockopt
= sock_common_setsockopt
, /* ok */
536 .getsockopt
= sock_common_getsockopt
, /* ok */
537 .sendmsg
= inet_sendmsg
, /* ok */
538 .recvmsg
= inet_recvmsg
, /* ok */
539 .mmap
= sock_no_mmap
,
540 .sendpage
= inet_sendpage
,
541 .splice_read
= tcp_splice_read
,
543 .compat_setsockopt
= compat_sock_common_setsockopt
,
544 .compat_getsockopt
= compat_sock_common_getsockopt
,
548 const struct proto_ops inet6_dgram_ops
= {
550 .owner
= THIS_MODULE
,
551 .release
= inet6_release
,
553 .connect
= inet_dgram_connect
, /* ok */
554 .socketpair
= sock_no_socketpair
, /* a do nothing */
555 .accept
= sock_no_accept
, /* a do nothing */
556 .getname
= inet6_getname
,
557 .poll
= udp_poll
, /* ok */
558 .ioctl
= inet6_ioctl
, /* must change */
559 .listen
= sock_no_listen
, /* ok */
560 .shutdown
= inet_shutdown
, /* ok */
561 .setsockopt
= sock_common_setsockopt
, /* ok */
562 .getsockopt
= sock_common_getsockopt
, /* ok */
563 .sendmsg
= inet_sendmsg
, /* ok */
564 .recvmsg
= inet_recvmsg
, /* ok */
565 .mmap
= sock_no_mmap
,
566 .sendpage
= sock_no_sendpage
,
567 .set_peek_off
= sk_set_peek_off
,
569 .compat_setsockopt
= compat_sock_common_setsockopt
,
570 .compat_getsockopt
= compat_sock_common_getsockopt
,
574 static const struct net_proto_family inet6_family_ops
= {
576 .create
= inet6_create
,
577 .owner
= THIS_MODULE
,
580 int inet6_register_protosw(struct inet_protosw
*p
)
582 struct list_head
*lh
;
583 struct inet_protosw
*answer
;
584 struct list_head
*last_perm
;
585 int protocol
= p
->protocol
;
588 spin_lock_bh(&inetsw6_lock
);
591 if (p
->type
>= SOCK_MAX
)
594 /* If we are trying to override a permanent protocol, bail. */
597 last_perm
= &inetsw6
[p
->type
];
598 list_for_each(lh
, &inetsw6
[p
->type
]) {
599 answer
= list_entry(lh
, struct inet_protosw
, list
);
601 /* Check only the non-wild match. */
602 if (INET_PROTOSW_PERMANENT
& answer
->flags
) {
603 if (protocol
== answer
->protocol
)
613 /* Add the new entry after the last permanent entry if any, so that
614 * the new entry does not override a permanent entry when matched with
615 * a wild-card protocol. But it is allowed to override any existing
616 * non-permanent entry. This means that when we remove this entry, the
617 * system automatically returns to the old behavior.
619 list_add_rcu(&p
->list
, last_perm
);
622 spin_unlock_bh(&inetsw6_lock
);
626 pr_err("Attempt to override permanent protocol %d\n", protocol
);
630 pr_err("Ignoring attempt to register invalid socket type %d\n",
634 EXPORT_SYMBOL(inet6_register_protosw
);
637 inet6_unregister_protosw(struct inet_protosw
*p
)
639 if (INET_PROTOSW_PERMANENT
& p
->flags
) {
640 pr_err("Attempt to unregister permanent protocol %d\n",
643 spin_lock_bh(&inetsw6_lock
);
644 list_del_rcu(&p
->list
);
645 spin_unlock_bh(&inetsw6_lock
);
650 EXPORT_SYMBOL(inet6_unregister_protosw
);
652 int inet6_sk_rebuild_header(struct sock
*sk
)
654 struct ipv6_pinfo
*np
= inet6_sk(sk
);
655 struct dst_entry
*dst
;
657 dst
= __sk_dst_check(sk
, np
->dst_cookie
);
660 struct inet_sock
*inet
= inet_sk(sk
);
661 struct in6_addr
*final_p
, final
;
664 memset(&fl6
, 0, sizeof(fl6
));
665 fl6
.flowi6_proto
= sk
->sk_protocol
;
666 fl6
.daddr
= sk
->sk_v6_daddr
;
667 fl6
.saddr
= np
->saddr
;
668 fl6
.flowlabel
= np
->flow_label
;
669 fl6
.flowi6_oif
= sk
->sk_bound_dev_if
;
670 fl6
.flowi6_mark
= sk
->sk_mark
;
671 fl6
.fl6_dport
= inet
->inet_dport
;
672 fl6
.fl6_sport
= inet
->inet_sport
;
673 security_sk_classify_flow(sk
, flowi6_to_flowi(&fl6
));
676 final_p
= fl6_update_dst(&fl6
, rcu_dereference(np
->opt
),
680 dst
= ip6_dst_lookup_flow(sk
, &fl6
, final_p
);
682 sk
->sk_route_caps
= 0;
683 sk
->sk_err_soft
= -PTR_ERR(dst
);
687 ip6_dst_store(sk
, dst
, NULL
, NULL
);
692 EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header
);
694 bool ipv6_opt_accepted(const struct sock
*sk
, const struct sk_buff
*skb
,
695 const struct inet6_skb_parm
*opt
)
697 const struct ipv6_pinfo
*np
= inet6_sk(sk
);
700 if (((opt
->flags
& IP6SKB_HOPBYHOP
) &&
701 (np
->rxopt
.bits
.hopopts
|| np
->rxopt
.bits
.ohopopts
)) ||
702 (ip6_flowinfo((struct ipv6hdr
*) skb_network_header(skb
)) &&
703 np
->rxopt
.bits
.rxflow
) ||
704 (opt
->srcrt
&& (np
->rxopt
.bits
.srcrt
||
705 np
->rxopt
.bits
.osrcrt
)) ||
706 ((opt
->dst1
|| opt
->dst0
) &&
707 (np
->rxopt
.bits
.dstopts
|| np
->rxopt
.bits
.odstopts
)))
712 EXPORT_SYMBOL_GPL(ipv6_opt_accepted
);
714 static struct packet_type ipv6_packet_type __read_mostly
= {
715 .type
= cpu_to_be16(ETH_P_IPV6
),
719 static int __init
ipv6_packet_init(void)
721 dev_add_pack(&ipv6_packet_type
);
725 static void ipv6_packet_cleanup(void)
727 dev_remove_pack(&ipv6_packet_type
);
730 static int __net_init
ipv6_init_mibs(struct net
*net
)
734 net
->mib
.udp_stats_in6
= alloc_percpu(struct udp_mib
);
735 if (!net
->mib
.udp_stats_in6
)
737 net
->mib
.udplite_stats_in6
= alloc_percpu(struct udp_mib
);
738 if (!net
->mib
.udplite_stats_in6
)
739 goto err_udplite_mib
;
740 net
->mib
.ipv6_statistics
= alloc_percpu(struct ipstats_mib
);
741 if (!net
->mib
.ipv6_statistics
)
744 for_each_possible_cpu(i
) {
745 struct ipstats_mib
*af_inet6_stats
;
746 af_inet6_stats
= per_cpu_ptr(net
->mib
.ipv6_statistics
, i
);
747 u64_stats_init(&af_inet6_stats
->syncp
);
751 net
->mib
.icmpv6_statistics
= alloc_percpu(struct icmpv6_mib
);
752 if (!net
->mib
.icmpv6_statistics
)
754 net
->mib
.icmpv6msg_statistics
= kzalloc(sizeof(struct icmpv6msg_mib
),
756 if (!net
->mib
.icmpv6msg_statistics
)
757 goto err_icmpmsg_mib
;
761 free_percpu(net
->mib
.icmpv6_statistics
);
763 free_percpu(net
->mib
.ipv6_statistics
);
765 free_percpu(net
->mib
.udplite_stats_in6
);
767 free_percpu(net
->mib
.udp_stats_in6
);
771 static void ipv6_cleanup_mibs(struct net
*net
)
773 free_percpu(net
->mib
.udp_stats_in6
);
774 free_percpu(net
->mib
.udplite_stats_in6
);
775 free_percpu(net
->mib
.ipv6_statistics
);
776 free_percpu(net
->mib
.icmpv6_statistics
);
777 kfree(net
->mib
.icmpv6msg_statistics
);
780 static int __net_init
inet6_net_init(struct net
*net
)
784 net
->ipv6
.sysctl
.bindv6only
= 0;
785 net
->ipv6
.sysctl
.icmpv6_time
= 1*HZ
;
786 net
->ipv6
.sysctl
.flowlabel_consistency
= 1;
787 net
->ipv6
.sysctl
.auto_flowlabels
= IP6_DEFAULT_AUTO_FLOW_LABELS
;
788 net
->ipv6
.sysctl
.idgen_retries
= 3;
789 net
->ipv6
.sysctl
.idgen_delay
= 1 * HZ
;
790 net
->ipv6
.sysctl
.flowlabel_state_ranges
= 0;
791 atomic_set(&net
->ipv6
.fib6_sernum
, 1);
793 err
= ipv6_init_mibs(net
);
796 #ifdef CONFIG_PROC_FS
797 err
= udp6_proc_init(net
);
800 err
= tcp6_proc_init(net
);
803 err
= ac6_proc_init(net
);
809 #ifdef CONFIG_PROC_FS
815 ipv6_cleanup_mibs(net
);
820 static void __net_exit
inet6_net_exit(struct net
*net
)
822 #ifdef CONFIG_PROC_FS
827 ipv6_cleanup_mibs(net
);
830 static struct pernet_operations inet6_net_ops
= {
831 .init
= inet6_net_init
,
832 .exit
= inet6_net_exit
,
835 static const struct ipv6_stub ipv6_stub_impl
= {
836 .ipv6_sock_mc_join
= ipv6_sock_mc_join
,
837 .ipv6_sock_mc_drop
= ipv6_sock_mc_drop
,
838 .ipv6_dst_lookup
= ip6_dst_lookup
,
839 .udpv6_encap_enable
= udpv6_encap_enable
,
840 .ndisc_send_na
= ndisc_send_na
,
844 static int __init
inet6_init(void)
849 sock_skb_cb_check_size(sizeof(struct inet6_skb_parm
));
851 /* Register the socket-side information for inet6_create. */
852 for (r
= &inetsw6
[0]; r
< &inetsw6
[SOCK_MAX
]; ++r
)
855 if (disable_ipv6_mod
) {
856 pr_info("Loaded, but administratively disabled, reboot required to enable\n");
860 err
= proto_register(&tcpv6_prot
, 1);
864 err
= proto_register(&udpv6_prot
, 1);
866 goto out_unregister_tcp_proto
;
868 err
= proto_register(&udplitev6_prot
, 1);
870 goto out_unregister_udp_proto
;
872 err
= proto_register(&rawv6_prot
, 1);
874 goto out_unregister_udplite_proto
;
876 err
= proto_register(&pingv6_prot
, 1);
878 goto out_unregister_ping_proto
;
880 /* We MUST register RAW sockets before we create the ICMP6,
881 * IGMP6, or NDISC control sockets.
885 goto out_unregister_raw_proto
;
887 /* Register the family here so that the init calls below will
888 * be able to create sockets. (?? is this dangerous ??)
890 err
= sock_register(&inet6_family_ops
);
892 goto out_sock_register_fail
;
895 * ipngwg API draft makes clear that the correct semantics
896 * for TCP and UDP is to consider one TCP and UDP instance
897 * in a host available by both INET and INET6 APIs and
898 * able to communicate via both network protocols.
901 err
= register_pernet_subsys(&inet6_net_ops
);
903 goto register_pernet_fail
;
917 ipv6_stub
= &ipv6_stub_impl
;
919 err
= ipv6_netfilter_init();
922 /* Create /proc/foo6 entries. */
923 #ifdef CONFIG_PROC_FS
925 if (raw6_proc_init())
927 if (udplite6_proc_init())
928 goto proc_udplite6_fail
;
929 if (ipv6_misc_proc_init())
930 goto proc_misc6_fail
;
934 err
= ip6_route_init();
937 err
= ndisc_late_init();
939 goto ndisc_late_fail
;
940 err
= ip6_flowlabel_init();
942 goto ip6_flowlabel_fail
;
943 err
= addrconf_init();
947 /* Init v6 extension headers. */
948 err
= ipv6_exthdrs_init();
950 goto ipv6_exthdrs_fail
;
952 err
= ipv6_frag_init();
956 /* Init v6 transport protocols. */
961 err
= udplitev6_init();
965 err
= udpv6_offload_init();
967 goto udpv6_offload_fail
;
973 err
= ipv6_packet_init();
975 goto ipv6_packet_fail
;
981 err
= calipso_init();
986 err
= ipv6_sysctl_register();
1000 ipv6_packet_cleanup();
1004 udpv6_offload_exit();
1012 ipv6_exthdrs_exit();
1016 ip6_flowlabel_cleanup();
1018 ndisc_late_cleanup();
1020 ip6_route_cleanup();
1022 #ifdef CONFIG_PROC_FS
1025 ipv6_misc_proc_exit();
1027 udplite6_proc_exit();
1032 ipv6_netfilter_fini();
1042 unregister_pernet_subsys(&inet6_net_ops
);
1043 register_pernet_fail
:
1044 sock_unregister(PF_INET6
);
1045 rtnl_unregister_all(PF_INET6
);
1046 out_sock_register_fail
:
1048 out_unregister_ping_proto
:
1049 proto_unregister(&pingv6_prot
);
1050 out_unregister_raw_proto
:
1051 proto_unregister(&rawv6_prot
);
1052 out_unregister_udplite_proto
:
1053 proto_unregister(&udplitev6_prot
);
1054 out_unregister_udp_proto
:
1055 proto_unregister(&udpv6_prot
);
1056 out_unregister_tcp_proto
:
1057 proto_unregister(&tcpv6_prot
);
1060 module_init(inet6_init
);
1062 MODULE_ALIAS_NETPROTO(PF_INET6
);