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
);