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 if (protocol
< 0 || protocol
>= IPPROTO_MAX
)
137 /* Look for the requested type/protocol pair. */
139 err
= -ESOCKTNOSUPPORT
;
141 list_for_each_entry_rcu(answer
, &inetsw6
[sock
->type
], list
) {
144 /* Check the non-wild match. */
145 if (protocol
== answer
->protocol
) {
146 if (protocol
!= IPPROTO_IP
)
149 /* Check for the two wild cases. */
150 if (IPPROTO_IP
== protocol
) {
151 protocol
= answer
->protocol
;
154 if (IPPROTO_IP
== answer
->protocol
)
157 err
= -EPROTONOSUPPORT
;
161 if (try_loading_module
< 2) {
164 * Be more specific, e.g. net-pf-10-proto-132-type-1
165 * (net-pf-PF_INET6-proto-IPPROTO_SCTP-type-SOCK_STREAM)
167 if (++try_loading_module
== 1)
168 request_module("net-pf-%d-proto-%d-type-%d",
169 PF_INET6
, protocol
, sock
->type
);
171 * Fall back to generic, e.g. net-pf-10-proto-132
172 * (net-pf-PF_INET6-proto-IPPROTO_SCTP)
175 request_module("net-pf-%d-proto-%d",
177 goto lookup_protocol
;
183 if (sock
->type
== SOCK_RAW
&& !kern
&& !capable(CAP_NET_RAW
))
186 sock
->ops
= answer
->ops
;
187 answer_prot
= answer
->prot
;
188 answer_no_check
= answer
->no_check
;
189 answer_flags
= answer
->flags
;
192 WARN_ON(answer_prot
->slab
== NULL
);
195 sk
= sk_alloc(net
, PF_INET6
, GFP_KERNEL
, answer_prot
);
199 sock_init_data(sock
, sk
);
202 sk
->sk_no_check
= answer_no_check
;
203 if (INET_PROTOSW_REUSE
& answer_flags
)
204 sk
->sk_reuse
= SK_CAN_REUSE
;
207 inet
->is_icsk
= (INET_PROTOSW_ICSK
& answer_flags
) != 0;
209 if (SOCK_RAW
== sock
->type
) {
210 inet
->inet_num
= protocol
;
211 if (IPPROTO_RAW
== protocol
)
215 sk
->sk_destruct
= inet_sock_destruct
;
216 sk
->sk_family
= PF_INET6
;
217 sk
->sk_protocol
= protocol
;
219 sk
->sk_backlog_rcv
= answer
->prot
->backlog_rcv
;
221 inet_sk(sk
)->pinet6
= np
= inet6_sk_generic(sk
);
223 np
->mcast_hops
= IPV6_DEFAULT_MCASTHOPS
;
225 np
->pmtudisc
= IPV6_PMTUDISC_WANT
;
226 np
->ipv6only
= net
->ipv6
.sysctl
.bindv6only
;
228 /* Init the ipv4 part of the socket since we can have sockets
229 * using v6 API for ipv4.
236 inet
->mc_list
= NULL
;
239 if (ipv4_config
.no_pmtu_disc
)
240 inet
->pmtudisc
= IP_PMTUDISC_DONT
;
242 inet
->pmtudisc
= IP_PMTUDISC_WANT
;
244 * Increment only the relevant sk_prot->socks debug field, this changes
245 * the previous behaviour of incrementing both the equivalent to
246 * answer->prot->socks (inet6_sock_nr) and inet_sock_nr.
248 * This allows better debug granularity as we'll know exactly how many
249 * UDPv6, TCPv6, etc socks were allocated, not the sum of all IPv6
250 * transport protocol socks. -acme
252 sk_refcnt_debug_inc(sk
);
254 if (inet
->inet_num
) {
255 /* It assumes that any protocol which allows
256 * the user to assign a number at socket
257 * creation time automatically shares.
259 inet
->inet_sport
= htons(inet
->inet_num
);
260 sk
->sk_prot
->hash(sk
);
262 if (sk
->sk_prot
->init
) {
263 err
= sk
->sk_prot
->init(sk
);
265 sk_common_release(sk
);
277 /* bind for INET6 API */
278 int inet6_bind(struct socket
*sock
, struct sockaddr
*uaddr
, int addr_len
)
280 struct sockaddr_in6
*addr
= (struct sockaddr_in6
*)uaddr
;
281 struct sock
*sk
= sock
->sk
;
282 struct inet_sock
*inet
= inet_sk(sk
);
283 struct ipv6_pinfo
*np
= inet6_sk(sk
);
284 struct net
*net
= sock_net(sk
);
290 /* If the socket has its own bind function then use it. */
291 if (sk
->sk_prot
->bind
)
292 return sk
->sk_prot
->bind(sk
, uaddr
, addr_len
);
294 if (addr_len
< SIN6_LEN_RFC2133
)
297 if (addr
->sin6_family
!= AF_INET6
)
298 return -EAFNOSUPPORT
;
300 addr_type
= ipv6_addr_type(&addr
->sin6_addr
);
301 if ((addr_type
& IPV6_ADDR_MULTICAST
) && sock
->type
== SOCK_STREAM
)
304 snum
= ntohs(addr
->sin6_port
);
305 if (snum
&& snum
< PROT_SOCK
&& !ns_capable(net
->user_ns
, CAP_NET_BIND_SERVICE
))
310 /* Check these errors (active socket, double bind). */
311 if (sk
->sk_state
!= TCP_CLOSE
|| inet
->inet_num
) {
316 /* Check if the address belongs to the host. */
317 if (addr_type
== IPV6_ADDR_MAPPED
) {
320 /* Binding to v4-mapped address on a v6-only socket
328 /* Reproduce AF_INET checks to make the bindings consistent */
329 v4addr
= addr
->sin6_addr
.s6_addr32
[3];
330 chk_addr_ret
= inet_addr_type(net
, v4addr
);
331 if (!sysctl_ip_nonlocal_bind
&&
332 !(inet
->freebind
|| inet
->transparent
) &&
333 v4addr
!= htonl(INADDR_ANY
) &&
334 chk_addr_ret
!= RTN_LOCAL
&&
335 chk_addr_ret
!= RTN_MULTICAST
&&
336 chk_addr_ret
!= RTN_BROADCAST
) {
337 err
= -EADDRNOTAVAIL
;
341 if (addr_type
!= IPV6_ADDR_ANY
) {
342 struct net_device
*dev
= NULL
;
345 if (__ipv6_addr_needs_scope_id(addr_type
)) {
346 if (addr_len
>= sizeof(struct sockaddr_in6
) &&
347 addr
->sin6_scope_id
) {
348 /* Override any existing binding, if another one
349 * is supplied by user.
351 sk
->sk_bound_dev_if
= addr
->sin6_scope_id
;
354 /* Binding to link-local address requires an interface */
355 if (!sk
->sk_bound_dev_if
) {
359 dev
= dev_get_by_index_rcu(net
, sk
->sk_bound_dev_if
);
366 /* ipv4 addr of the socket is invalid. Only the
367 * unspecified and mapped address have a v4 equivalent.
369 v4addr
= LOOPBACK4_IPV6
;
370 if (!(addr_type
& IPV6_ADDR_MULTICAST
)) {
371 if (!(inet
->freebind
|| inet
->transparent
) &&
372 !ipv6_chk_addr(net
, &addr
->sin6_addr
,
374 err
= -EADDRNOTAVAIL
;
382 inet
->inet_rcv_saddr
= v4addr
;
383 inet
->inet_saddr
= v4addr
;
385 np
->rcv_saddr
= addr
->sin6_addr
;
387 if (!(addr_type
& IPV6_ADDR_MULTICAST
))
388 np
->saddr
= addr
->sin6_addr
;
390 /* Make sure we are allowed to bind here. */
391 if (sk
->sk_prot
->get_port(sk
, snum
)) {
392 inet_reset_saddr(sk
);
397 if (addr_type
!= IPV6_ADDR_ANY
) {
398 sk
->sk_userlocks
|= SOCK_BINDADDR_LOCK
;
399 if (addr_type
!= IPV6_ADDR_MAPPED
)
403 sk
->sk_userlocks
|= SOCK_BINDPORT_LOCK
;
404 inet
->inet_sport
= htons(inet
->inet_num
);
405 inet
->inet_dport
= 0;
406 inet
->inet_daddr
= 0;
414 EXPORT_SYMBOL(inet6_bind
);
416 int inet6_release(struct socket
*sock
)
418 struct sock
*sk
= sock
->sk
;
424 ipv6_sock_mc_close(sk
);
427 ipv6_sock_ac_close(sk
);
429 return inet_release(sock
);
431 EXPORT_SYMBOL(inet6_release
);
433 void inet6_destroy_sock(struct sock
*sk
)
435 struct ipv6_pinfo
*np
= inet6_sk(sk
);
437 struct ipv6_txoptions
*opt
;
439 /* Release rx options */
441 skb
= xchg(&np
->pktoptions
, NULL
);
445 skb
= xchg(&np
->rxpmtu
, NULL
);
449 /* Free flowlabels */
450 fl6_free_socklist(sk
);
452 /* Free tx options */
454 opt
= xchg(&np
->opt
, NULL
);
456 sock_kfree_s(sk
, opt
, opt
->tot_len
);
458 EXPORT_SYMBOL_GPL(inet6_destroy_sock
);
461 * This does both peername and sockname.
464 int inet6_getname(struct socket
*sock
, struct sockaddr
*uaddr
,
465 int *uaddr_len
, int peer
)
467 struct sockaddr_in6
*sin
= (struct sockaddr_in6
*)uaddr
;
468 struct sock
*sk
= sock
->sk
;
469 struct inet_sock
*inet
= inet_sk(sk
);
470 struct ipv6_pinfo
*np
= inet6_sk(sk
);
472 sin
->sin6_family
= AF_INET6
;
473 sin
->sin6_flowinfo
= 0;
474 sin
->sin6_scope_id
= 0;
476 if (!inet
->inet_dport
)
478 if (((1 << sk
->sk_state
) & (TCPF_CLOSE
| TCPF_SYN_SENT
)) &&
481 sin
->sin6_port
= inet
->inet_dport
;
482 sin
->sin6_addr
= np
->daddr
;
484 sin
->sin6_flowinfo
= np
->flow_label
;
486 if (ipv6_addr_any(&np
->rcv_saddr
))
487 sin
->sin6_addr
= np
->saddr
;
489 sin
->sin6_addr
= np
->rcv_saddr
;
491 sin
->sin6_port
= inet
->inet_sport
;
493 sin
->sin6_scope_id
= ipv6_iface_scope_id(&sin
->sin6_addr
,
494 sk
->sk_bound_dev_if
);
495 *uaddr_len
= sizeof(*sin
);
498 EXPORT_SYMBOL(inet6_getname
);
500 int inet6_killaddr_ioctl(struct net
*net
, void __user
*arg
) {
501 struct in6_ifreq ireq
;
502 struct sockaddr_in6 sin6
;
504 if (!capable(CAP_NET_ADMIN
))
507 if (copy_from_user(&ireq
, arg
, sizeof(struct in6_ifreq
)))
510 sin6
.sin6_family
= AF_INET6
;
511 sin6
.sin6_addr
= ireq
.ifr6_addr
;
512 return tcp_nuke_addr(net
, (struct sockaddr
*) &sin6
);
515 int inet6_ioctl(struct socket
*sock
, unsigned int cmd
, unsigned long arg
)
517 struct sock
*sk
= sock
->sk
;
518 struct net
*net
= sock_net(sk
);
522 return sock_get_timestamp(sk
, (struct timeval __user
*)arg
);
525 return sock_get_timestampns(sk
, (struct timespec __user
*)arg
);
530 return ipv6_route_ioctl(net
, cmd
, (void __user
*)arg
);
533 return addrconf_add_ifaddr(net
, (void __user
*) arg
);
535 return addrconf_del_ifaddr(net
, (void __user
*) arg
);
537 return addrconf_set_dstaddr(net
, (void __user
*) arg
);
539 return inet6_killaddr_ioctl(net
, (void __user
*) arg
);
541 if (!sk
->sk_prot
->ioctl
)
543 return sk
->sk_prot
->ioctl(sk
, cmd
, arg
);
548 EXPORT_SYMBOL(inet6_ioctl
);
550 const struct proto_ops inet6_stream_ops
= {
552 .owner
= THIS_MODULE
,
553 .release
= inet6_release
,
555 .connect
= inet_stream_connect
, /* ok */
556 .socketpair
= sock_no_socketpair
, /* a do nothing */
557 .accept
= inet_accept
, /* ok */
558 .getname
= inet6_getname
,
559 .poll
= tcp_poll
, /* ok */
560 .ioctl
= inet6_ioctl
, /* must change */
561 .listen
= inet_listen
, /* ok */
562 .shutdown
= inet_shutdown
, /* ok */
563 .setsockopt
= sock_common_setsockopt
, /* ok */
564 .getsockopt
= sock_common_getsockopt
, /* ok */
565 .sendmsg
= inet_sendmsg
, /* ok */
566 .recvmsg
= inet_recvmsg
, /* ok */
567 .mmap
= sock_no_mmap
,
568 .sendpage
= inet_sendpage
,
569 .splice_read
= tcp_splice_read
,
571 .compat_setsockopt
= compat_sock_common_setsockopt
,
572 .compat_getsockopt
= compat_sock_common_getsockopt
,
576 const struct proto_ops inet6_dgram_ops
= {
578 .owner
= THIS_MODULE
,
579 .release
= inet6_release
,
581 .connect
= inet_dgram_connect
, /* ok */
582 .socketpair
= sock_no_socketpair
, /* a do nothing */
583 .accept
= sock_no_accept
, /* a do nothing */
584 .getname
= inet6_getname
,
585 .poll
= udp_poll
, /* ok */
586 .ioctl
= inet6_ioctl
, /* must change */
587 .listen
= sock_no_listen
, /* ok */
588 .shutdown
= inet_shutdown
, /* ok */
589 .setsockopt
= sock_common_setsockopt
, /* ok */
590 .getsockopt
= sock_common_getsockopt
, /* ok */
591 .sendmsg
= inet_sendmsg
, /* ok */
592 .recvmsg
= inet_recvmsg
, /* ok */
593 .mmap
= sock_no_mmap
,
594 .sendpage
= sock_no_sendpage
,
596 .compat_setsockopt
= compat_sock_common_setsockopt
,
597 .compat_getsockopt
= compat_sock_common_getsockopt
,
601 static const struct net_proto_family inet6_family_ops
= {
603 .create
= inet6_create
,
604 .owner
= THIS_MODULE
,
607 int inet6_register_protosw(struct inet_protosw
*p
)
609 struct list_head
*lh
;
610 struct inet_protosw
*answer
;
611 struct list_head
*last_perm
;
612 int protocol
= p
->protocol
;
615 spin_lock_bh(&inetsw6_lock
);
618 if (p
->type
>= SOCK_MAX
)
621 /* If we are trying to override a permanent protocol, bail. */
624 last_perm
= &inetsw6
[p
->type
];
625 list_for_each(lh
, &inetsw6
[p
->type
]) {
626 answer
= list_entry(lh
, struct inet_protosw
, list
);
628 /* Check only the non-wild match. */
629 if (INET_PROTOSW_PERMANENT
& answer
->flags
) {
630 if (protocol
== answer
->protocol
)
640 /* Add the new entry after the last permanent entry if any, so that
641 * the new entry does not override a permanent entry when matched with
642 * a wild-card protocol. But it is allowed to override any existing
643 * non-permanent entry. This means that when we remove this entry, the
644 * system automatically returns to the old behavior.
646 list_add_rcu(&p
->list
, last_perm
);
649 spin_unlock_bh(&inetsw6_lock
);
653 pr_err("Attempt to override permanent protocol %d\n", protocol
);
657 pr_err("Ignoring attempt to register invalid socket type %d\n",
661 EXPORT_SYMBOL(inet6_register_protosw
);
664 inet6_unregister_protosw(struct inet_protosw
*p
)
666 if (INET_PROTOSW_PERMANENT
& p
->flags
) {
667 pr_err("Attempt to unregister permanent protocol %d\n",
670 spin_lock_bh(&inetsw6_lock
);
671 list_del_rcu(&p
->list
);
672 spin_unlock_bh(&inetsw6_lock
);
677 EXPORT_SYMBOL(inet6_unregister_protosw
);
679 int inet6_sk_rebuild_header(struct sock
*sk
)
681 struct ipv6_pinfo
*np
= inet6_sk(sk
);
682 struct dst_entry
*dst
;
684 dst
= __sk_dst_check(sk
, np
->dst_cookie
);
687 struct inet_sock
*inet
= inet_sk(sk
);
688 struct in6_addr
*final_p
, final
;
691 memset(&fl6
, 0, sizeof(fl6
));
692 fl6
.flowi6_proto
= sk
->sk_protocol
;
693 fl6
.daddr
= np
->daddr
;
694 fl6
.saddr
= np
->saddr
;
695 fl6
.flowlabel
= np
->flow_label
;
696 fl6
.flowi6_oif
= sk
->sk_bound_dev_if
;
697 fl6
.flowi6_mark
= sk
->sk_mark
;
698 fl6
.fl6_dport
= inet
->inet_dport
;
699 fl6
.fl6_sport
= inet
->inet_sport
;
700 fl6
.flowi6_uid
= sock_i_uid(sk
);
701 security_sk_classify_flow(sk
, flowi6_to_flowi(&fl6
));
703 final_p
= fl6_update_dst(&fl6
, np
->opt
, &final
);
705 dst
= ip6_dst_lookup_flow(sk
, &fl6
, final_p
, false);
707 sk
->sk_route_caps
= 0;
708 sk
->sk_err_soft
= -PTR_ERR(dst
);
712 __ip6_dst_store(sk
, dst
, NULL
, NULL
);
717 EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header
);
719 bool ipv6_opt_accepted(const struct sock
*sk
, const struct sk_buff
*skb
)
721 const struct ipv6_pinfo
*np
= inet6_sk(sk
);
722 const struct inet6_skb_parm
*opt
= IP6CB(skb
);
725 if ((opt
->hop
&& (np
->rxopt
.bits
.hopopts
||
726 np
->rxopt
.bits
.ohopopts
)) ||
727 ((IPV6_FLOWINFO_MASK
&
728 *(__be32
*)skb_network_header(skb
)) &&
729 np
->rxopt
.bits
.rxflow
) ||
730 (opt
->srcrt
&& (np
->rxopt
.bits
.srcrt
||
731 np
->rxopt
.bits
.osrcrt
)) ||
732 ((opt
->dst1
|| opt
->dst0
) &&
733 (np
->rxopt
.bits
.dstopts
|| np
->rxopt
.bits
.odstopts
)))
738 EXPORT_SYMBOL_GPL(ipv6_opt_accepted
);
740 static struct packet_type ipv6_packet_type __read_mostly
= {
741 .type
= cpu_to_be16(ETH_P_IPV6
),
745 static int __init
ipv6_packet_init(void)
747 dev_add_pack(&ipv6_packet_type
);
751 static void ipv6_packet_cleanup(void)
753 dev_remove_pack(&ipv6_packet_type
);
756 static int __net_init
ipv6_init_mibs(struct net
*net
)
758 if (snmp_mib_init((void __percpu
**)net
->mib
.udp_stats_in6
,
759 sizeof(struct udp_mib
),
760 __alignof__(struct udp_mib
)) < 0)
762 if (snmp_mib_init((void __percpu
**)net
->mib
.udplite_stats_in6
,
763 sizeof(struct udp_mib
),
764 __alignof__(struct udp_mib
)) < 0)
765 goto err_udplite_mib
;
766 if (snmp_mib_init((void __percpu
**)net
->mib
.ipv6_statistics
,
767 sizeof(struct ipstats_mib
),
768 __alignof__(struct ipstats_mib
)) < 0)
770 if (snmp_mib_init((void __percpu
**)net
->mib
.icmpv6_statistics
,
771 sizeof(struct icmpv6_mib
),
772 __alignof__(struct icmpv6_mib
)) < 0)
774 net
->mib
.icmpv6msg_statistics
= kzalloc(sizeof(struct icmpv6msg_mib
),
776 if (!net
->mib
.icmpv6msg_statistics
)
777 goto err_icmpmsg_mib
;
781 snmp_mib_free((void __percpu
**)net
->mib
.icmpv6_statistics
);
783 snmp_mib_free((void __percpu
**)net
->mib
.ipv6_statistics
);
785 snmp_mib_free((void __percpu
**)net
->mib
.udplite_stats_in6
);
787 snmp_mib_free((void __percpu
**)net
->mib
.udp_stats_in6
);
791 static void ipv6_cleanup_mibs(struct net
*net
)
793 snmp_mib_free((void __percpu
**)net
->mib
.udp_stats_in6
);
794 snmp_mib_free((void __percpu
**)net
->mib
.udplite_stats_in6
);
795 snmp_mib_free((void __percpu
**)net
->mib
.ipv6_statistics
);
796 snmp_mib_free((void __percpu
**)net
->mib
.icmpv6_statistics
);
797 kfree(net
->mib
.icmpv6msg_statistics
);
800 static int __net_init
inet6_net_init(struct net
*net
)
804 net
->ipv6
.sysctl
.bindv6only
= 0;
805 net
->ipv6
.sysctl
.icmpv6_time
= 1*HZ
;
807 err
= ipv6_init_mibs(net
);
810 #ifdef CONFIG_PROC_FS
811 err
= udp6_proc_init(net
);
814 err
= tcp6_proc_init(net
);
817 err
= ac6_proc_init(net
);
823 #ifdef CONFIG_PROC_FS
829 ipv6_cleanup_mibs(net
);
834 static void __net_exit
inet6_net_exit(struct net
*net
)
836 #ifdef CONFIG_PROC_FS
841 ipv6_cleanup_mibs(net
);
844 static struct pernet_operations inet6_net_ops
= {
845 .init
= inet6_net_init
,
846 .exit
= inet6_net_exit
,
849 static int __init
inet6_init(void)
854 BUILD_BUG_ON(sizeof(struct inet6_skb_parm
) > FIELD_SIZEOF(struct sk_buff
, cb
));
856 /* Register the socket-side information for inet6_create. */
857 for (r
= &inetsw6
[0]; r
< &inetsw6
[SOCK_MAX
]; ++r
)
860 if (disable_ipv6_mod
) {
861 pr_info("Loaded, but administratively disabled, reboot required to enable\n");
865 err
= proto_register(&tcpv6_prot
, 1);
869 err
= proto_register(&udpv6_prot
, 1);
871 goto out_unregister_tcp_proto
;
873 err
= proto_register(&udplitev6_prot
, 1);
875 goto out_unregister_udp_proto
;
877 err
= proto_register(&rawv6_prot
, 1);
879 goto out_unregister_udplite_proto
;
881 err
= proto_register(&pingv6_prot
, 1);
883 goto out_unregister_ping_proto
;
885 /* We MUST register RAW sockets before we create the ICMP6,
886 * IGMP6, or NDISC control sockets.
890 goto out_unregister_raw_proto
;
892 /* Register the family here so that the init calls below will
893 * be able to create sockets. (?? is this dangerous ??)
895 err
= sock_register(&inet6_family_ops
);
897 goto out_sock_register_fail
;
899 tcpv6_prot
.sysctl_mem
= init_net
.ipv4
.sysctl_tcp_mem
;
902 * ipngwg API draft makes clear that the correct semantics
903 * for TCP and UDP is to consider one TCP and UDP instance
904 * in a host available by both INET and INET6 APIs and
905 * able to communicate via both network protocols.
908 err
= register_pernet_subsys(&inet6_net_ops
);
910 goto register_pernet_fail
;
923 err
= ipv6_netfilter_init();
926 /* Create /proc/foo6 entries. */
927 #ifdef CONFIG_PROC_FS
929 if (raw6_proc_init())
931 if (udplite6_proc_init())
932 goto proc_udplite6_fail
;
933 if (ipv6_misc_proc_init())
934 goto proc_misc6_fail
;
938 err
= ip6_route_init();
941 err
= ndisc_late_init();
943 goto ndisc_late_fail
;
944 err
= ip6_flowlabel_init();
946 goto ip6_flowlabel_fail
;
947 err
= addrconf_init();
951 /* Init v6 extension headers. */
952 err
= ipv6_exthdrs_init();
954 goto ipv6_exthdrs_fail
;
956 err
= ipv6_frag_init();
960 /* Init v6 transport protocols. */
965 err
= udplitev6_init();
973 err
= ipv6_packet_init();
975 goto ipv6_packet_fail
;
982 err
= ipv6_sysctl_register();
991 ipv6_packet_cleanup();
1004 ipv6_exthdrs_exit();
1008 ip6_flowlabel_cleanup();
1010 ndisc_late_cleanup();
1012 ip6_route_cleanup();
1014 #ifdef CONFIG_PROC_FS
1017 ipv6_misc_proc_exit();
1019 udplite6_proc_exit();
1024 ipv6_netfilter_fini();
1034 unregister_pernet_subsys(&inet6_net_ops
);
1035 register_pernet_fail
:
1036 sock_unregister(PF_INET6
);
1037 rtnl_unregister_all(PF_INET6
);
1038 out_sock_register_fail
:
1040 out_unregister_ping_proto
:
1041 proto_unregister(&pingv6_prot
);
1042 out_unregister_raw_proto
:
1043 proto_unregister(&rawv6_prot
);
1044 out_unregister_udplite_proto
:
1045 proto_unregister(&udplitev6_prot
);
1046 out_unregister_udp_proto
:
1047 proto_unregister(&udpv6_prot
);
1048 out_unregister_tcp_proto
:
1049 proto_unregister(&tcpv6_prot
);
1052 module_init(inet6_init
);
1054 static void __exit
inet6_exit(void)
1056 if (disable_ipv6_mod
)
1059 /* First of all disallow new sockets creation. */
1060 sock_unregister(PF_INET6
);
1061 /* Disallow any further netlink messages */
1062 rtnl_unregister_all(PF_INET6
);
1068 /* Cleanup code parts. */
1069 ipv6_packet_cleanup();
1071 ipv6_exthdrs_exit();
1073 ip6_flowlabel_cleanup();
1074 ndisc_late_cleanup();
1075 ip6_route_cleanup();
1076 #ifdef CONFIG_PROC_FS
1078 /* Cleanup code parts. */
1080 ipv6_misc_proc_exit();
1081 udplite6_proc_exit();
1084 ipv6_netfilter_fini();
1091 unregister_pernet_subsys(&inet6_net_ops
);
1092 proto_unregister(&rawv6_prot
);
1093 proto_unregister(&udplitev6_prot
);
1094 proto_unregister(&udpv6_prot
);
1095 proto_unregister(&tcpv6_prot
);
1097 rcu_barrier(); /* Wait for completion of call_rcu()'s */
1099 module_exit(inet6_exit
);
1101 MODULE_ALIAS_NETPROTO(PF_INET6
);