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 #include "ip6_offload.h"
69 MODULE_AUTHOR("Cast of dozens");
70 MODULE_DESCRIPTION("IPv6 protocol stack for Linux");
71 MODULE_LICENSE("GPL");
73 /* The inetsw6 table contains everything that inet6_create needs to
76 static struct list_head inetsw6
[SOCK_MAX
];
77 static DEFINE_SPINLOCK(inetsw6_lock
);
79 struct ipv6_params ipv6_defaults
= {
84 static int disable_ipv6_mod
;
86 module_param_named(disable
, disable_ipv6_mod
, int, 0444);
87 MODULE_PARM_DESC(disable
, "Disable IPv6 module such that it is non-functional");
89 module_param_named(disable_ipv6
, ipv6_defaults
.disable_ipv6
, int, 0444);
90 MODULE_PARM_DESC(disable_ipv6
, "Disable IPv6 on all interfaces");
92 module_param_named(autoconf
, ipv6_defaults
.autoconf
, int, 0444);
93 MODULE_PARM_DESC(autoconf
, "Enable IPv6 address autoconfiguration on all interfaces");
95 bool ipv6_mod_enabled(void)
97 return disable_ipv6_mod
== 0;
99 EXPORT_SYMBOL_GPL(ipv6_mod_enabled
);
101 static __inline__
struct ipv6_pinfo
*inet6_sk_generic(struct sock
*sk
)
103 const int offset
= sk
->sk_prot
->obj_size
- sizeof(struct ipv6_pinfo
);
105 return (struct ipv6_pinfo
*)(((u8
*)sk
) + offset
);
108 static int inet6_create(struct net
*net
, struct socket
*sock
, int protocol
,
111 struct inet_sock
*inet
;
112 struct ipv6_pinfo
*np
;
114 struct inet_protosw
*answer
;
115 struct proto
*answer_prot
;
116 unsigned char answer_flags
;
117 int try_loading_module
= 0;
120 if (protocol
< 0 || protocol
>= IPPROTO_MAX
)
123 /* Look for the requested type/protocol pair. */
125 err
= -ESOCKTNOSUPPORT
;
127 list_for_each_entry_rcu(answer
, &inetsw6
[sock
->type
], list
) {
130 /* Check the non-wild match. */
131 if (protocol
== answer
->protocol
) {
132 if (protocol
!= IPPROTO_IP
)
135 /* Check for the two wild cases. */
136 if (IPPROTO_IP
== protocol
) {
137 protocol
= answer
->protocol
;
140 if (IPPROTO_IP
== answer
->protocol
)
143 err
= -EPROTONOSUPPORT
;
147 if (try_loading_module
< 2) {
150 * Be more specific, e.g. net-pf-10-proto-132-type-1
151 * (net-pf-PF_INET6-proto-IPPROTO_SCTP-type-SOCK_STREAM)
153 if (++try_loading_module
== 1)
154 request_module("net-pf-%d-proto-%d-type-%d",
155 PF_INET6
, protocol
, sock
->type
);
157 * Fall back to generic, e.g. net-pf-10-proto-132
158 * (net-pf-PF_INET6-proto-IPPROTO_SCTP)
161 request_module("net-pf-%d-proto-%d",
163 goto lookup_protocol
;
169 if (sock
->type
== SOCK_RAW
&& !kern
&&
170 !ns_capable(net
->user_ns
, CAP_NET_RAW
))
173 sock
->ops
= answer
->ops
;
174 answer_prot
= answer
->prot
;
175 answer_flags
= answer
->flags
;
178 WARN_ON(!answer_prot
->slab
);
181 sk
= sk_alloc(net
, PF_INET6
, GFP_KERNEL
, answer_prot
, kern
);
185 sock_init_data(sock
, sk
);
188 if (INET_PROTOSW_REUSE
& answer_flags
)
189 sk
->sk_reuse
= SK_CAN_REUSE
;
192 inet
->is_icsk
= (INET_PROTOSW_ICSK
& answer_flags
) != 0;
194 if (SOCK_RAW
== sock
->type
) {
195 inet
->inet_num
= protocol
;
196 if (IPPROTO_RAW
== protocol
)
200 sk
->sk_destruct
= inet_sock_destruct
;
201 sk
->sk_family
= PF_INET6
;
202 sk
->sk_protocol
= protocol
;
204 sk
->sk_backlog_rcv
= answer
->prot
->backlog_rcv
;
206 inet_sk(sk
)->pinet6
= np
= inet6_sk_generic(sk
);
208 np
->mcast_hops
= IPV6_DEFAULT_MCASTHOPS
;
210 np
->pmtudisc
= IPV6_PMTUDISC_WANT
;
211 np
->autoflowlabel
= ip6_default_np_autolabel(sock_net(sk
));
212 sk
->sk_ipv6only
= net
->ipv6
.sysctl
.bindv6only
;
214 /* Init the ipv4 part of the socket since we can have sockets
215 * using v6 API for ipv4.
222 inet
->mc_list
= NULL
;
225 if (net
->ipv4
.sysctl_ip_no_pmtu_disc
)
226 inet
->pmtudisc
= IP_PMTUDISC_DONT
;
228 inet
->pmtudisc
= IP_PMTUDISC_WANT
;
230 * Increment only the relevant sk_prot->socks debug field, this changes
231 * the previous behaviour of incrementing both the equivalent to
232 * answer->prot->socks (inet6_sock_nr) and inet_sock_nr.
234 * This allows better debug granularity as we'll know exactly how many
235 * UDPv6, TCPv6, etc socks were allocated, not the sum of all IPv6
236 * transport protocol socks. -acme
238 sk_refcnt_debug_inc(sk
);
240 if (inet
->inet_num
) {
241 /* It assumes that any protocol which allows
242 * the user to assign a number at socket
243 * creation time automatically shares.
245 inet
->inet_sport
= htons(inet
->inet_num
);
246 err
= sk
->sk_prot
->hash(sk
);
248 sk_common_release(sk
);
252 if (sk
->sk_prot
->init
) {
253 err
= sk
->sk_prot
->init(sk
);
255 sk_common_release(sk
);
267 /* bind for INET6 API */
268 int inet6_bind(struct socket
*sock
, struct sockaddr
*uaddr
, int addr_len
)
270 struct sockaddr_in6
*addr
= (struct sockaddr_in6
*)uaddr
;
271 struct sock
*sk
= sock
->sk
;
272 struct inet_sock
*inet
= inet_sk(sk
);
273 struct ipv6_pinfo
*np
= inet6_sk(sk
);
274 struct net
*net
= sock_net(sk
);
280 /* If the socket has its own bind function then use it. */
281 if (sk
->sk_prot
->bind
)
282 return sk
->sk_prot
->bind(sk
, uaddr
, addr_len
);
284 if (addr_len
< SIN6_LEN_RFC2133
)
287 if (addr
->sin6_family
!= AF_INET6
)
288 return -EAFNOSUPPORT
;
290 addr_type
= ipv6_addr_type(&addr
->sin6_addr
);
291 if ((addr_type
& IPV6_ADDR_MULTICAST
) && sock
->type
== SOCK_STREAM
)
294 snum
= ntohs(addr
->sin6_port
);
295 if (snum
&& snum
< PROT_SOCK
&& !ns_capable(net
->user_ns
, CAP_NET_BIND_SERVICE
))
300 /* Check these errors (active socket, double bind). */
301 if (sk
->sk_state
!= TCP_CLOSE
|| inet
->inet_num
) {
306 /* Check if the address belongs to the host. */
307 if (addr_type
== IPV6_ADDR_MAPPED
) {
310 /* Binding to v4-mapped address on a v6-only socket
313 if (sk
->sk_ipv6only
) {
318 /* Reproduce AF_INET checks to make the bindings consistent */
319 v4addr
= addr
->sin6_addr
.s6_addr32
[3];
320 chk_addr_ret
= inet_addr_type(net
, v4addr
);
321 if (!net
->ipv4
.sysctl_ip_nonlocal_bind
&&
322 !(inet
->freebind
|| inet
->transparent
) &&
323 v4addr
!= htonl(INADDR_ANY
) &&
324 chk_addr_ret
!= RTN_LOCAL
&&
325 chk_addr_ret
!= RTN_MULTICAST
&&
326 chk_addr_ret
!= RTN_BROADCAST
) {
327 err
= -EADDRNOTAVAIL
;
331 if (addr_type
!= IPV6_ADDR_ANY
) {
332 struct net_device
*dev
= NULL
;
335 if (__ipv6_addr_needs_scope_id(addr_type
)) {
336 if (addr_len
>= sizeof(struct sockaddr_in6
) &&
337 addr
->sin6_scope_id
) {
338 /* Override any existing binding, if another one
339 * is supplied by user.
341 sk
->sk_bound_dev_if
= addr
->sin6_scope_id
;
344 /* Binding to link-local address requires an interface */
345 if (!sk
->sk_bound_dev_if
) {
349 dev
= dev_get_by_index_rcu(net
, sk
->sk_bound_dev_if
);
356 /* ipv4 addr of the socket is invalid. Only the
357 * unspecified and mapped address have a v4 equivalent.
359 v4addr
= LOOPBACK4_IPV6
;
360 if (!(addr_type
& IPV6_ADDR_MULTICAST
)) {
361 if (!net
->ipv6
.sysctl
.ip_nonlocal_bind
&&
362 !(inet
->freebind
|| inet
->transparent
) &&
363 !ipv6_chk_addr(net
, &addr
->sin6_addr
,
365 err
= -EADDRNOTAVAIL
;
373 inet
->inet_rcv_saddr
= v4addr
;
374 inet
->inet_saddr
= v4addr
;
376 sk
->sk_v6_rcv_saddr
= addr
->sin6_addr
;
378 if (!(addr_type
& IPV6_ADDR_MULTICAST
))
379 np
->saddr
= addr
->sin6_addr
;
381 /* Make sure we are allowed to bind here. */
382 if ((snum
|| !inet
->bind_address_no_port
) &&
383 sk
->sk_prot
->get_port(sk
, snum
)) {
384 inet_reset_saddr(sk
);
389 if (addr_type
!= IPV6_ADDR_ANY
) {
390 sk
->sk_userlocks
|= SOCK_BINDADDR_LOCK
;
391 if (addr_type
!= IPV6_ADDR_MAPPED
)
395 sk
->sk_userlocks
|= SOCK_BINDPORT_LOCK
;
396 inet
->inet_sport
= htons(inet
->inet_num
);
397 inet
->inet_dport
= 0;
398 inet
->inet_daddr
= 0;
406 EXPORT_SYMBOL(inet6_bind
);
408 int inet6_release(struct socket
*sock
)
410 struct sock
*sk
= sock
->sk
;
416 ipv6_sock_mc_close(sk
);
419 ipv6_sock_ac_close(sk
);
421 return inet_release(sock
);
423 EXPORT_SYMBOL(inet6_release
);
425 void inet6_destroy_sock(struct sock
*sk
)
427 struct ipv6_pinfo
*np
= inet6_sk(sk
);
429 struct ipv6_txoptions
*opt
;
431 /* Release rx options */
433 skb
= xchg(&np
->pktoptions
, NULL
);
437 skb
= xchg(&np
->rxpmtu
, NULL
);
441 /* Free flowlabels */
442 fl6_free_socklist(sk
);
444 /* Free tx options */
446 opt
= xchg((__force
struct ipv6_txoptions
**)&np
->opt
, NULL
);
448 atomic_sub(opt
->tot_len
, &sk
->sk_omem_alloc
);
452 EXPORT_SYMBOL_GPL(inet6_destroy_sock
);
455 * This does both peername and sockname.
458 int inet6_getname(struct socket
*sock
, struct sockaddr
*uaddr
,
459 int *uaddr_len
, int peer
)
461 struct sockaddr_in6
*sin
= (struct sockaddr_in6
*)uaddr
;
462 struct sock
*sk
= sock
->sk
;
463 struct inet_sock
*inet
= inet_sk(sk
);
464 struct ipv6_pinfo
*np
= inet6_sk(sk
);
466 sin
->sin6_family
= AF_INET6
;
467 sin
->sin6_flowinfo
= 0;
468 sin
->sin6_scope_id
= 0;
470 if (!inet
->inet_dport
)
472 if (((1 << sk
->sk_state
) & (TCPF_CLOSE
| TCPF_SYN_SENT
)) &&
475 sin
->sin6_port
= inet
->inet_dport
;
476 sin
->sin6_addr
= sk
->sk_v6_daddr
;
478 sin
->sin6_flowinfo
= np
->flow_label
;
480 if (ipv6_addr_any(&sk
->sk_v6_rcv_saddr
))
481 sin
->sin6_addr
= np
->saddr
;
483 sin
->sin6_addr
= sk
->sk_v6_rcv_saddr
;
485 sin
->sin6_port
= inet
->inet_sport
;
487 sin
->sin6_scope_id
= ipv6_iface_scope_id(&sin
->sin6_addr
,
488 sk
->sk_bound_dev_if
);
489 *uaddr_len
= sizeof(*sin
);
492 EXPORT_SYMBOL(inet6_getname
);
494 int inet6_ioctl(struct socket
*sock
, unsigned int cmd
, unsigned long arg
)
496 struct sock
*sk
= sock
->sk
;
497 struct net
*net
= sock_net(sk
);
501 return sock_get_timestamp(sk
, (struct timeval __user
*)arg
);
504 return sock_get_timestampns(sk
, (struct timespec __user
*)arg
);
509 return ipv6_route_ioctl(net
, cmd
, (void __user
*)arg
);
512 return addrconf_add_ifaddr(net
, (void __user
*) arg
);
514 return addrconf_del_ifaddr(net
, (void __user
*) arg
);
516 return addrconf_set_dstaddr(net
, (void __user
*) arg
);
518 if (!sk
->sk_prot
->ioctl
)
520 return sk
->sk_prot
->ioctl(sk
, cmd
, arg
);
525 EXPORT_SYMBOL(inet6_ioctl
);
527 const struct proto_ops inet6_stream_ops
= {
529 .owner
= THIS_MODULE
,
530 .release
= inet6_release
,
532 .connect
= inet_stream_connect
, /* ok */
533 .socketpair
= sock_no_socketpair
, /* a do nothing */
534 .accept
= inet_accept
, /* ok */
535 .getname
= inet6_getname
,
536 .poll
= tcp_poll
, /* ok */
537 .ioctl
= inet6_ioctl
, /* must change */
538 .listen
= inet_listen
, /* ok */
539 .shutdown
= inet_shutdown
, /* ok */
540 .setsockopt
= sock_common_setsockopt
, /* ok */
541 .getsockopt
= sock_common_getsockopt
, /* ok */
542 .sendmsg
= inet_sendmsg
, /* ok */
543 .recvmsg
= inet_recvmsg
, /* ok */
544 .mmap
= sock_no_mmap
,
545 .sendpage
= inet_sendpage
,
546 .splice_read
= tcp_splice_read
,
548 .compat_setsockopt
= compat_sock_common_setsockopt
,
549 .compat_getsockopt
= compat_sock_common_getsockopt
,
553 const struct proto_ops inet6_dgram_ops
= {
555 .owner
= THIS_MODULE
,
556 .release
= inet6_release
,
558 .connect
= inet_dgram_connect
, /* ok */
559 .socketpair
= sock_no_socketpair
, /* a do nothing */
560 .accept
= sock_no_accept
, /* a do nothing */
561 .getname
= inet6_getname
,
562 .poll
= udp_poll
, /* ok */
563 .ioctl
= inet6_ioctl
, /* must change */
564 .listen
= sock_no_listen
, /* ok */
565 .shutdown
= inet_shutdown
, /* ok */
566 .setsockopt
= sock_common_setsockopt
, /* ok */
567 .getsockopt
= sock_common_getsockopt
, /* ok */
568 .sendmsg
= inet_sendmsg
, /* ok */
569 .recvmsg
= inet_recvmsg
, /* ok */
570 .mmap
= sock_no_mmap
,
571 .sendpage
= sock_no_sendpage
,
572 .set_peek_off
= sk_set_peek_off
,
574 .compat_setsockopt
= compat_sock_common_setsockopt
,
575 .compat_getsockopt
= compat_sock_common_getsockopt
,
579 static const struct net_proto_family inet6_family_ops
= {
581 .create
= inet6_create
,
582 .owner
= THIS_MODULE
,
585 int inet6_register_protosw(struct inet_protosw
*p
)
587 struct list_head
*lh
;
588 struct inet_protosw
*answer
;
589 struct list_head
*last_perm
;
590 int protocol
= p
->protocol
;
593 spin_lock_bh(&inetsw6_lock
);
596 if (p
->type
>= SOCK_MAX
)
599 /* If we are trying to override a permanent protocol, bail. */
602 last_perm
= &inetsw6
[p
->type
];
603 list_for_each(lh
, &inetsw6
[p
->type
]) {
604 answer
= list_entry(lh
, struct inet_protosw
, list
);
606 /* Check only the non-wild match. */
607 if (INET_PROTOSW_PERMANENT
& answer
->flags
) {
608 if (protocol
== answer
->protocol
)
618 /* Add the new entry after the last permanent entry if any, so that
619 * the new entry does not override a permanent entry when matched with
620 * a wild-card protocol. But it is allowed to override any existing
621 * non-permanent entry. This means that when we remove this entry, the
622 * system automatically returns to the old behavior.
624 list_add_rcu(&p
->list
, last_perm
);
627 spin_unlock_bh(&inetsw6_lock
);
631 pr_err("Attempt to override permanent protocol %d\n", protocol
);
635 pr_err("Ignoring attempt to register invalid socket type %d\n",
639 EXPORT_SYMBOL(inet6_register_protosw
);
642 inet6_unregister_protosw(struct inet_protosw
*p
)
644 if (INET_PROTOSW_PERMANENT
& p
->flags
) {
645 pr_err("Attempt to unregister permanent protocol %d\n",
648 spin_lock_bh(&inetsw6_lock
);
649 list_del_rcu(&p
->list
);
650 spin_unlock_bh(&inetsw6_lock
);
655 EXPORT_SYMBOL(inet6_unregister_protosw
);
657 int inet6_sk_rebuild_header(struct sock
*sk
)
659 struct ipv6_pinfo
*np
= inet6_sk(sk
);
660 struct dst_entry
*dst
;
662 dst
= __sk_dst_check(sk
, np
->dst_cookie
);
665 struct inet_sock
*inet
= inet_sk(sk
);
666 struct in6_addr
*final_p
, final
;
669 memset(&fl6
, 0, sizeof(fl6
));
670 fl6
.flowi6_proto
= sk
->sk_protocol
;
671 fl6
.daddr
= sk
->sk_v6_daddr
;
672 fl6
.saddr
= np
->saddr
;
673 fl6
.flowlabel
= np
->flow_label
;
674 fl6
.flowi6_oif
= sk
->sk_bound_dev_if
;
675 fl6
.flowi6_mark
= sk
->sk_mark
;
676 fl6
.fl6_dport
= inet
->inet_dport
;
677 fl6
.fl6_sport
= inet
->inet_sport
;
678 security_sk_classify_flow(sk
, flowi6_to_flowi(&fl6
));
681 final_p
= fl6_update_dst(&fl6
, rcu_dereference(np
->opt
),
685 dst
= ip6_dst_lookup_flow(sk
, &fl6
, final_p
);
687 sk
->sk_route_caps
= 0;
688 sk
->sk_err_soft
= -PTR_ERR(dst
);
692 ip6_dst_store(sk
, dst
, NULL
, NULL
);
697 EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header
);
699 bool ipv6_opt_accepted(const struct sock
*sk
, const struct sk_buff
*skb
,
700 const struct inet6_skb_parm
*opt
)
702 const struct ipv6_pinfo
*np
= inet6_sk(sk
);
705 if (((opt
->flags
& IP6SKB_HOPBYHOP
) &&
706 (np
->rxopt
.bits
.hopopts
|| np
->rxopt
.bits
.ohopopts
)) ||
707 (ip6_flowinfo((struct ipv6hdr
*) skb_network_header(skb
)) &&
708 np
->rxopt
.bits
.rxflow
) ||
709 (opt
->srcrt
&& (np
->rxopt
.bits
.srcrt
||
710 np
->rxopt
.bits
.osrcrt
)) ||
711 ((opt
->dst1
|| opt
->dst0
) &&
712 (np
->rxopt
.bits
.dstopts
|| np
->rxopt
.bits
.odstopts
)))
717 EXPORT_SYMBOL_GPL(ipv6_opt_accepted
);
719 static struct packet_type ipv6_packet_type __read_mostly
= {
720 .type
= cpu_to_be16(ETH_P_IPV6
),
724 static int __init
ipv6_packet_init(void)
726 dev_add_pack(&ipv6_packet_type
);
730 static void ipv6_packet_cleanup(void)
732 dev_remove_pack(&ipv6_packet_type
);
735 static int __net_init
ipv6_init_mibs(struct net
*net
)
739 net
->mib
.udp_stats_in6
= alloc_percpu(struct udp_mib
);
740 if (!net
->mib
.udp_stats_in6
)
742 net
->mib
.udplite_stats_in6
= alloc_percpu(struct udp_mib
);
743 if (!net
->mib
.udplite_stats_in6
)
744 goto err_udplite_mib
;
745 net
->mib
.ipv6_statistics
= alloc_percpu(struct ipstats_mib
);
746 if (!net
->mib
.ipv6_statistics
)
749 for_each_possible_cpu(i
) {
750 struct ipstats_mib
*af_inet6_stats
;
751 af_inet6_stats
= per_cpu_ptr(net
->mib
.ipv6_statistics
, i
);
752 u64_stats_init(&af_inet6_stats
->syncp
);
756 net
->mib
.icmpv6_statistics
= alloc_percpu(struct icmpv6_mib
);
757 if (!net
->mib
.icmpv6_statistics
)
759 net
->mib
.icmpv6msg_statistics
= kzalloc(sizeof(struct icmpv6msg_mib
),
761 if (!net
->mib
.icmpv6msg_statistics
)
762 goto err_icmpmsg_mib
;
766 free_percpu(net
->mib
.icmpv6_statistics
);
768 free_percpu(net
->mib
.ipv6_statistics
);
770 free_percpu(net
->mib
.udplite_stats_in6
);
772 free_percpu(net
->mib
.udp_stats_in6
);
776 static void ipv6_cleanup_mibs(struct net
*net
)
778 free_percpu(net
->mib
.udp_stats_in6
);
779 free_percpu(net
->mib
.udplite_stats_in6
);
780 free_percpu(net
->mib
.ipv6_statistics
);
781 free_percpu(net
->mib
.icmpv6_statistics
);
782 kfree(net
->mib
.icmpv6msg_statistics
);
785 static int __net_init
inet6_net_init(struct net
*net
)
789 net
->ipv6
.sysctl
.bindv6only
= 0;
790 net
->ipv6
.sysctl
.icmpv6_time
= 1*HZ
;
791 net
->ipv6
.sysctl
.flowlabel_consistency
= 1;
792 net
->ipv6
.sysctl
.auto_flowlabels
= IP6_DEFAULT_AUTO_FLOW_LABELS
;
793 net
->ipv6
.sysctl
.idgen_retries
= 3;
794 net
->ipv6
.sysctl
.idgen_delay
= 1 * HZ
;
795 net
->ipv6
.sysctl
.flowlabel_state_ranges
= 0;
796 atomic_set(&net
->ipv6
.fib6_sernum
, 1);
798 err
= ipv6_init_mibs(net
);
801 #ifdef CONFIG_PROC_FS
802 err
= udp6_proc_init(net
);
805 err
= tcp6_proc_init(net
);
808 err
= ac6_proc_init(net
);
814 #ifdef CONFIG_PROC_FS
820 ipv6_cleanup_mibs(net
);
825 static void __net_exit
inet6_net_exit(struct net
*net
)
827 #ifdef CONFIG_PROC_FS
832 ipv6_cleanup_mibs(net
);
835 static struct pernet_operations inet6_net_ops
= {
836 .init
= inet6_net_init
,
837 .exit
= inet6_net_exit
,
840 static const struct ipv6_stub ipv6_stub_impl
= {
841 .ipv6_sock_mc_join
= ipv6_sock_mc_join
,
842 .ipv6_sock_mc_drop
= ipv6_sock_mc_drop
,
843 .ipv6_dst_lookup
= ip6_dst_lookup
,
844 .udpv6_encap_enable
= udpv6_encap_enable
,
845 .ndisc_send_na
= ndisc_send_na
,
849 static int __init
inet6_init(void)
854 sock_skb_cb_check_size(sizeof(struct inet6_skb_parm
));
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
;
900 * ipngwg API draft makes clear that the correct semantics
901 * for TCP and UDP is to consider one TCP and UDP instance
902 * in a host available by both INET and INET6 APIs and
903 * able to communicate via both network protocols.
906 err
= register_pernet_subsys(&inet6_net_ops
);
908 goto register_pernet_fail
;
922 ipv6_stub
= &ipv6_stub_impl
;
924 err
= ipv6_netfilter_init();
927 /* Create /proc/foo6 entries. */
928 #ifdef CONFIG_PROC_FS
930 if (raw6_proc_init())
932 if (udplite6_proc_init())
933 goto proc_udplite6_fail
;
934 if (ipv6_misc_proc_init())
935 goto proc_misc6_fail
;
939 err
= ip6_route_init();
942 err
= ndisc_late_init();
944 goto ndisc_late_fail
;
945 err
= ip6_flowlabel_init();
947 goto ip6_flowlabel_fail
;
948 err
= addrconf_init();
952 /* Init v6 extension headers. */
953 err
= ipv6_exthdrs_init();
955 goto ipv6_exthdrs_fail
;
957 err
= ipv6_frag_init();
961 /* Init v6 transport protocols. */
966 err
= udplitev6_init();
970 err
= udpv6_offload_init();
972 goto udpv6_offload_fail
;
978 err
= ipv6_packet_init();
980 goto ipv6_packet_fail
;
987 err
= ipv6_sysctl_register();
999 ipv6_packet_cleanup();
1003 udpv6_offload_exit();
1011 ipv6_exthdrs_exit();
1015 ip6_flowlabel_cleanup();
1017 ndisc_late_cleanup();
1019 ip6_route_cleanup();
1021 #ifdef CONFIG_PROC_FS
1024 ipv6_misc_proc_exit();
1026 udplite6_proc_exit();
1031 ipv6_netfilter_fini();
1041 unregister_pernet_subsys(&inet6_net_ops
);
1042 register_pernet_fail
:
1043 sock_unregister(PF_INET6
);
1044 rtnl_unregister_all(PF_INET6
);
1045 out_sock_register_fail
:
1047 out_unregister_ping_proto
:
1048 proto_unregister(&pingv6_prot
);
1049 out_unregister_raw_proto
:
1050 proto_unregister(&rawv6_prot
);
1051 out_unregister_udplite_proto
:
1052 proto_unregister(&udplitev6_prot
);
1053 out_unregister_udp_proto
:
1054 proto_unregister(&udpv6_prot
);
1055 out_unregister_tcp_proto
:
1056 proto_unregister(&tcpv6_prot
);
1059 module_init(inet6_init
);
1061 MODULE_ALIAS_NETPROTO(PF_INET6
);