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>
66 #include <linux/uaccess.h>
67 #include <linux/mroute6.h>
69 #include "ip6_offload.h"
71 MODULE_AUTHOR("Cast of dozens");
72 MODULE_DESCRIPTION("IPv6 protocol stack for Linux");
73 MODULE_LICENSE("GPL");
75 /* The inetsw6 table contains everything that inet6_create needs to
78 static struct list_head inetsw6
[SOCK_MAX
];
79 static DEFINE_SPINLOCK(inetsw6_lock
);
81 struct ipv6_params ipv6_defaults
= {
86 static int disable_ipv6_mod
;
88 module_param_named(disable
, disable_ipv6_mod
, int, 0444);
89 MODULE_PARM_DESC(disable
, "Disable IPv6 module such that it is non-functional");
91 module_param_named(disable_ipv6
, ipv6_defaults
.disable_ipv6
, int, 0444);
92 MODULE_PARM_DESC(disable_ipv6
, "Disable IPv6 on all interfaces");
94 module_param_named(autoconf
, ipv6_defaults
.autoconf
, int, 0444);
95 MODULE_PARM_DESC(autoconf
, "Enable IPv6 address autoconfiguration on all interfaces");
97 bool ipv6_mod_enabled(void)
99 return disable_ipv6_mod
== 0;
101 EXPORT_SYMBOL_GPL(ipv6_mod_enabled
);
103 static __inline__
struct ipv6_pinfo
*inet6_sk_generic(struct sock
*sk
)
105 const int offset
= sk
->sk_prot
->obj_size
- sizeof(struct ipv6_pinfo
);
107 return (struct ipv6_pinfo
*)(((u8
*)sk
) + offset
);
110 static int inet6_create(struct net
*net
, struct socket
*sock
, int protocol
,
113 struct inet_sock
*inet
;
114 struct ipv6_pinfo
*np
;
116 struct inet_protosw
*answer
;
117 struct proto
*answer_prot
;
118 unsigned char answer_flags
;
119 int try_loading_module
= 0;
122 if (protocol
< 0 || protocol
>= IPPROTO_MAX
)
125 /* Look for the requested type/protocol pair. */
127 err
= -ESOCKTNOSUPPORT
;
129 list_for_each_entry_rcu(answer
, &inetsw6
[sock
->type
], list
) {
132 /* Check the non-wild match. */
133 if (protocol
== answer
->protocol
) {
134 if (protocol
!= IPPROTO_IP
)
137 /* Check for the two wild cases. */
138 if (IPPROTO_IP
== protocol
) {
139 protocol
= answer
->protocol
;
142 if (IPPROTO_IP
== answer
->protocol
)
145 err
= -EPROTONOSUPPORT
;
149 if (try_loading_module
< 2) {
152 * Be more specific, e.g. net-pf-10-proto-132-type-1
153 * (net-pf-PF_INET6-proto-IPPROTO_SCTP-type-SOCK_STREAM)
155 if (++try_loading_module
== 1)
156 request_module("net-pf-%d-proto-%d-type-%d",
157 PF_INET6
, protocol
, sock
->type
);
159 * Fall back to generic, e.g. net-pf-10-proto-132
160 * (net-pf-PF_INET6-proto-IPPROTO_SCTP)
163 request_module("net-pf-%d-proto-%d",
165 goto lookup_protocol
;
171 if (sock
->type
== SOCK_RAW
&& !kern
&&
172 !ns_capable(net
->user_ns
, CAP_NET_RAW
))
175 sock
->ops
= answer
->ops
;
176 answer_prot
= answer
->prot
;
177 answer_flags
= answer
->flags
;
180 WARN_ON(!answer_prot
->slab
);
183 sk
= sk_alloc(net
, PF_INET6
, GFP_KERNEL
, answer_prot
, kern
);
187 sock_init_data(sock
, sk
);
190 if (INET_PROTOSW_REUSE
& answer_flags
)
191 sk
->sk_reuse
= SK_CAN_REUSE
;
194 inet
->is_icsk
= (INET_PROTOSW_ICSK
& answer_flags
) != 0;
196 if (SOCK_RAW
== sock
->type
) {
197 inet
->inet_num
= protocol
;
198 if (IPPROTO_RAW
== protocol
)
202 sk
->sk_destruct
= inet_sock_destruct
;
203 sk
->sk_family
= PF_INET6
;
204 sk
->sk_protocol
= protocol
;
206 sk
->sk_backlog_rcv
= answer
->prot
->backlog_rcv
;
208 inet_sk(sk
)->pinet6
= np
= inet6_sk_generic(sk
);
210 np
->mcast_hops
= IPV6_DEFAULT_MCASTHOPS
;
212 np
->pmtudisc
= IPV6_PMTUDISC_WANT
;
213 np
->autoflowlabel
= ip6_default_np_autolabel(sock_net(sk
));
214 sk
->sk_ipv6only
= net
->ipv6
.sysctl
.bindv6only
;
216 /* Init the ipv4 part of the socket since we can have sockets
217 * using v6 API for ipv4.
224 inet
->mc_list
= NULL
;
227 if (net
->ipv4
.sysctl_ip_no_pmtu_disc
)
228 inet
->pmtudisc
= IP_PMTUDISC_DONT
;
230 inet
->pmtudisc
= IP_PMTUDISC_WANT
;
232 * Increment only the relevant sk_prot->socks debug field, this changes
233 * the previous behaviour of incrementing both the equivalent to
234 * answer->prot->socks (inet6_sock_nr) and inet_sock_nr.
236 * This allows better debug granularity as we'll know exactly how many
237 * UDPv6, TCPv6, etc socks were allocated, not the sum of all IPv6
238 * transport protocol socks. -acme
240 sk_refcnt_debug_inc(sk
);
242 if (inet
->inet_num
) {
243 /* It assumes that any protocol which allows
244 * the user to assign a number at socket
245 * creation time automatically shares.
247 inet
->inet_sport
= htons(inet
->inet_num
);
248 err
= sk
->sk_prot
->hash(sk
);
250 sk_common_release(sk
);
254 if (sk
->sk_prot
->init
) {
255 err
= sk
->sk_prot
->init(sk
);
257 sk_common_release(sk
);
263 err
= BPF_CGROUP_RUN_PROG_INET_SOCK(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
< inet_prot_sock(net
) &&
306 !ns_capable(net
->user_ns
, CAP_NET_BIND_SERVICE
))
311 /* Check these errors (active socket, double bind). */
312 if (sk
->sk_state
!= TCP_CLOSE
|| inet
->inet_num
) {
317 /* Check if the address belongs to the host. */
318 if (addr_type
== IPV6_ADDR_MAPPED
) {
321 /* Binding to v4-mapped address on a v6-only socket
324 if (sk
->sk_ipv6only
) {
329 /* Reproduce AF_INET checks to make the bindings consistent */
330 v4addr
= addr
->sin6_addr
.s6_addr32
[3];
331 chk_addr_ret
= inet_addr_type(net
, v4addr
);
332 if (!net
->ipv4
.sysctl_ip_nonlocal_bind
&&
333 !(inet
->freebind
|| inet
->transparent
) &&
334 v4addr
!= htonl(INADDR_ANY
) &&
335 chk_addr_ret
!= RTN_LOCAL
&&
336 chk_addr_ret
!= RTN_MULTICAST
&&
337 chk_addr_ret
!= RTN_BROADCAST
) {
338 err
= -EADDRNOTAVAIL
;
342 if (addr_type
!= IPV6_ADDR_ANY
) {
343 struct net_device
*dev
= NULL
;
346 if (__ipv6_addr_needs_scope_id(addr_type
)) {
347 if (addr_len
>= sizeof(struct sockaddr_in6
) &&
348 addr
->sin6_scope_id
) {
349 /* Override any existing binding, if another one
350 * is supplied by user.
352 sk
->sk_bound_dev_if
= addr
->sin6_scope_id
;
355 /* Binding to link-local address requires an interface */
356 if (!sk
->sk_bound_dev_if
) {
360 dev
= dev_get_by_index_rcu(net
, sk
->sk_bound_dev_if
);
367 /* ipv4 addr of the socket is invalid. Only the
368 * unspecified and mapped address have a v4 equivalent.
370 v4addr
= LOOPBACK4_IPV6
;
371 if (!(addr_type
& IPV6_ADDR_MULTICAST
)) {
372 if (!net
->ipv6
.sysctl
.ip_nonlocal_bind
&&
373 !(inet
->freebind
|| inet
->transparent
) &&
374 !ipv6_chk_addr(net
, &addr
->sin6_addr
,
376 err
= -EADDRNOTAVAIL
;
384 inet
->inet_rcv_saddr
= v4addr
;
385 inet
->inet_saddr
= v4addr
;
387 sk
->sk_v6_rcv_saddr
= addr
->sin6_addr
;
389 if (!(addr_type
& IPV6_ADDR_MULTICAST
))
390 np
->saddr
= addr
->sin6_addr
;
392 /* Make sure we are allowed to bind here. */
393 if ((snum
|| !inet
->bind_address_no_port
) &&
394 sk
->sk_prot
->get_port(sk
, snum
)) {
395 inet_reset_saddr(sk
);
400 if (addr_type
!= IPV6_ADDR_ANY
) {
401 sk
->sk_userlocks
|= SOCK_BINDADDR_LOCK
;
402 if (addr_type
!= IPV6_ADDR_MAPPED
)
406 sk
->sk_userlocks
|= SOCK_BINDPORT_LOCK
;
407 inet
->inet_sport
= htons(inet
->inet_num
);
408 inet
->inet_dport
= 0;
409 inet
->inet_daddr
= 0;
417 EXPORT_SYMBOL(inet6_bind
);
419 int inet6_release(struct socket
*sock
)
421 struct sock
*sk
= sock
->sk
;
427 ipv6_sock_mc_close(sk
);
430 ipv6_sock_ac_close(sk
);
432 return inet_release(sock
);
434 EXPORT_SYMBOL(inet6_release
);
436 void inet6_destroy_sock(struct sock
*sk
)
438 struct ipv6_pinfo
*np
= inet6_sk(sk
);
440 struct ipv6_txoptions
*opt
;
442 /* Release rx options */
444 skb
= xchg(&np
->pktoptions
, NULL
);
448 skb
= xchg(&np
->rxpmtu
, NULL
);
452 /* Free flowlabels */
453 fl6_free_socklist(sk
);
455 /* Free tx options */
457 opt
= xchg((__force
struct ipv6_txoptions
**)&np
->opt
, NULL
);
459 atomic_sub(opt
->tot_len
, &sk
->sk_omem_alloc
);
463 EXPORT_SYMBOL_GPL(inet6_destroy_sock
);
466 * This does both peername and sockname.
469 int inet6_getname(struct socket
*sock
, struct sockaddr
*uaddr
,
470 int *uaddr_len
, int peer
)
472 struct sockaddr_in6
*sin
= (struct sockaddr_in6
*)uaddr
;
473 struct sock
*sk
= sock
->sk
;
474 struct inet_sock
*inet
= inet_sk(sk
);
475 struct ipv6_pinfo
*np
= inet6_sk(sk
);
477 sin
->sin6_family
= AF_INET6
;
478 sin
->sin6_flowinfo
= 0;
479 sin
->sin6_scope_id
= 0;
481 if (!inet
->inet_dport
)
483 if (((1 << sk
->sk_state
) & (TCPF_CLOSE
| TCPF_SYN_SENT
)) &&
486 sin
->sin6_port
= inet
->inet_dport
;
487 sin
->sin6_addr
= sk
->sk_v6_daddr
;
489 sin
->sin6_flowinfo
= np
->flow_label
;
491 if (ipv6_addr_any(&sk
->sk_v6_rcv_saddr
))
492 sin
->sin6_addr
= np
->saddr
;
494 sin
->sin6_addr
= sk
->sk_v6_rcv_saddr
;
496 sin
->sin6_port
= inet
->inet_sport
;
498 sin
->sin6_scope_id
= ipv6_iface_scope_id(&sin
->sin6_addr
,
499 sk
->sk_bound_dev_if
);
500 *uaddr_len
= sizeof(*sin
);
503 EXPORT_SYMBOL(inet6_getname
);
505 int inet6_ioctl(struct socket
*sock
, unsigned int cmd
, unsigned long arg
)
507 struct sock
*sk
= sock
->sk
;
508 struct net
*net
= sock_net(sk
);
512 return sock_get_timestamp(sk
, (struct timeval __user
*)arg
);
515 return sock_get_timestampns(sk
, (struct timespec __user
*)arg
);
520 return ipv6_route_ioctl(net
, cmd
, (void __user
*)arg
);
523 return addrconf_add_ifaddr(net
, (void __user
*) arg
);
525 return addrconf_del_ifaddr(net
, (void __user
*) arg
);
527 return addrconf_set_dstaddr(net
, (void __user
*) arg
);
529 if (!sk
->sk_prot
->ioctl
)
531 return sk
->sk_prot
->ioctl(sk
, cmd
, arg
);
536 EXPORT_SYMBOL(inet6_ioctl
);
538 const struct proto_ops inet6_stream_ops
= {
540 .owner
= THIS_MODULE
,
541 .release
= inet6_release
,
543 .connect
= inet_stream_connect
, /* ok */
544 .socketpair
= sock_no_socketpair
, /* a do nothing */
545 .accept
= inet_accept
, /* ok */
546 .getname
= inet6_getname
,
547 .poll
= tcp_poll
, /* ok */
548 .ioctl
= inet6_ioctl
, /* must change */
549 .listen
= inet_listen
, /* ok */
550 .shutdown
= inet_shutdown
, /* ok */
551 .setsockopt
= sock_common_setsockopt
, /* ok */
552 .getsockopt
= sock_common_getsockopt
, /* ok */
553 .sendmsg
= inet_sendmsg
, /* ok */
554 .recvmsg
= inet_recvmsg
, /* ok */
555 .mmap
= sock_no_mmap
,
556 .sendpage
= inet_sendpage
,
557 .splice_read
= tcp_splice_read
,
558 .read_sock
= tcp_read_sock
,
559 .peek_len
= tcp_peek_len
,
561 .compat_setsockopt
= compat_sock_common_setsockopt
,
562 .compat_getsockopt
= compat_sock_common_getsockopt
,
566 const struct proto_ops inet6_dgram_ops
= {
568 .owner
= THIS_MODULE
,
569 .release
= inet6_release
,
571 .connect
= inet_dgram_connect
, /* ok */
572 .socketpair
= sock_no_socketpair
, /* a do nothing */
573 .accept
= sock_no_accept
, /* a do nothing */
574 .getname
= inet6_getname
,
575 .poll
= udp_poll
, /* ok */
576 .ioctl
= inet6_ioctl
, /* must change */
577 .listen
= sock_no_listen
, /* ok */
578 .shutdown
= inet_shutdown
, /* ok */
579 .setsockopt
= sock_common_setsockopt
, /* ok */
580 .getsockopt
= sock_common_getsockopt
, /* ok */
581 .sendmsg
= inet_sendmsg
, /* ok */
582 .recvmsg
= inet_recvmsg
, /* ok */
583 .mmap
= sock_no_mmap
,
584 .sendpage
= sock_no_sendpage
,
585 .set_peek_off
= sk_set_peek_off
,
587 .compat_setsockopt
= compat_sock_common_setsockopt
,
588 .compat_getsockopt
= compat_sock_common_getsockopt
,
592 static const struct net_proto_family inet6_family_ops
= {
594 .create
= inet6_create
,
595 .owner
= THIS_MODULE
,
598 int inet6_register_protosw(struct inet_protosw
*p
)
600 struct list_head
*lh
;
601 struct inet_protosw
*answer
;
602 struct list_head
*last_perm
;
603 int protocol
= p
->protocol
;
606 spin_lock_bh(&inetsw6_lock
);
609 if (p
->type
>= SOCK_MAX
)
612 /* If we are trying to override a permanent protocol, bail. */
615 last_perm
= &inetsw6
[p
->type
];
616 list_for_each(lh
, &inetsw6
[p
->type
]) {
617 answer
= list_entry(lh
, struct inet_protosw
, list
);
619 /* Check only the non-wild match. */
620 if (INET_PROTOSW_PERMANENT
& answer
->flags
) {
621 if (protocol
== answer
->protocol
)
631 /* Add the new entry after the last permanent entry if any, so that
632 * the new entry does not override a permanent entry when matched with
633 * a wild-card protocol. But it is allowed to override any existing
634 * non-permanent entry. This means that when we remove this entry, the
635 * system automatically returns to the old behavior.
637 list_add_rcu(&p
->list
, last_perm
);
640 spin_unlock_bh(&inetsw6_lock
);
644 pr_err("Attempt to override permanent protocol %d\n", protocol
);
648 pr_err("Ignoring attempt to register invalid socket type %d\n",
652 EXPORT_SYMBOL(inet6_register_protosw
);
655 inet6_unregister_protosw(struct inet_protosw
*p
)
657 if (INET_PROTOSW_PERMANENT
& p
->flags
) {
658 pr_err("Attempt to unregister permanent protocol %d\n",
661 spin_lock_bh(&inetsw6_lock
);
662 list_del_rcu(&p
->list
);
663 spin_unlock_bh(&inetsw6_lock
);
668 EXPORT_SYMBOL(inet6_unregister_protosw
);
670 int inet6_sk_rebuild_header(struct sock
*sk
)
672 struct ipv6_pinfo
*np
= inet6_sk(sk
);
673 struct dst_entry
*dst
;
675 dst
= __sk_dst_check(sk
, np
->dst_cookie
);
678 struct inet_sock
*inet
= inet_sk(sk
);
679 struct in6_addr
*final_p
, final
;
682 memset(&fl6
, 0, sizeof(fl6
));
683 fl6
.flowi6_proto
= sk
->sk_protocol
;
684 fl6
.daddr
= sk
->sk_v6_daddr
;
685 fl6
.saddr
= np
->saddr
;
686 fl6
.flowlabel
= np
->flow_label
;
687 fl6
.flowi6_oif
= sk
->sk_bound_dev_if
;
688 fl6
.flowi6_mark
= sk
->sk_mark
;
689 fl6
.fl6_dport
= inet
->inet_dport
;
690 fl6
.fl6_sport
= inet
->inet_sport
;
691 fl6
.flowi6_uid
= sk
->sk_uid
;
692 security_sk_classify_flow(sk
, flowi6_to_flowi(&fl6
));
695 final_p
= fl6_update_dst(&fl6
, rcu_dereference(np
->opt
),
699 dst
= ip6_dst_lookup_flow(sk
, &fl6
, final_p
);
701 sk
->sk_route_caps
= 0;
702 sk
->sk_err_soft
= -PTR_ERR(dst
);
706 ip6_dst_store(sk
, dst
, NULL
, NULL
);
711 EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header
);
713 bool ipv6_opt_accepted(const struct sock
*sk
, const struct sk_buff
*skb
,
714 const struct inet6_skb_parm
*opt
)
716 const struct ipv6_pinfo
*np
= inet6_sk(sk
);
719 if (((opt
->flags
& IP6SKB_HOPBYHOP
) &&
720 (np
->rxopt
.bits
.hopopts
|| np
->rxopt
.bits
.ohopopts
)) ||
721 (ip6_flowinfo((struct ipv6hdr
*) skb_network_header(skb
)) &&
722 np
->rxopt
.bits
.rxflow
) ||
723 (opt
->srcrt
&& (np
->rxopt
.bits
.srcrt
||
724 np
->rxopt
.bits
.osrcrt
)) ||
725 ((opt
->dst1
|| opt
->dst0
) &&
726 (np
->rxopt
.bits
.dstopts
|| np
->rxopt
.bits
.odstopts
)))
731 EXPORT_SYMBOL_GPL(ipv6_opt_accepted
);
733 static struct packet_type ipv6_packet_type __read_mostly
= {
734 .type
= cpu_to_be16(ETH_P_IPV6
),
738 static int __init
ipv6_packet_init(void)
740 dev_add_pack(&ipv6_packet_type
);
744 static void ipv6_packet_cleanup(void)
746 dev_remove_pack(&ipv6_packet_type
);
749 static int __net_init
ipv6_init_mibs(struct net
*net
)
753 net
->mib
.udp_stats_in6
= alloc_percpu(struct udp_mib
);
754 if (!net
->mib
.udp_stats_in6
)
756 net
->mib
.udplite_stats_in6
= alloc_percpu(struct udp_mib
);
757 if (!net
->mib
.udplite_stats_in6
)
758 goto err_udplite_mib
;
759 net
->mib
.ipv6_statistics
= alloc_percpu(struct ipstats_mib
);
760 if (!net
->mib
.ipv6_statistics
)
763 for_each_possible_cpu(i
) {
764 struct ipstats_mib
*af_inet6_stats
;
765 af_inet6_stats
= per_cpu_ptr(net
->mib
.ipv6_statistics
, i
);
766 u64_stats_init(&af_inet6_stats
->syncp
);
770 net
->mib
.icmpv6_statistics
= alloc_percpu(struct icmpv6_mib
);
771 if (!net
->mib
.icmpv6_statistics
)
773 net
->mib
.icmpv6msg_statistics
= kzalloc(sizeof(struct icmpv6msg_mib
),
775 if (!net
->mib
.icmpv6msg_statistics
)
776 goto err_icmpmsg_mib
;
780 free_percpu(net
->mib
.icmpv6_statistics
);
782 free_percpu(net
->mib
.ipv6_statistics
);
784 free_percpu(net
->mib
.udplite_stats_in6
);
786 free_percpu(net
->mib
.udp_stats_in6
);
790 static void ipv6_cleanup_mibs(struct net
*net
)
792 free_percpu(net
->mib
.udp_stats_in6
);
793 free_percpu(net
->mib
.udplite_stats_in6
);
794 free_percpu(net
->mib
.ipv6_statistics
);
795 free_percpu(net
->mib
.icmpv6_statistics
);
796 kfree(net
->mib
.icmpv6msg_statistics
);
799 static int __net_init
inet6_net_init(struct net
*net
)
803 net
->ipv6
.sysctl
.bindv6only
= 0;
804 net
->ipv6
.sysctl
.icmpv6_time
= 1*HZ
;
805 net
->ipv6
.sysctl
.flowlabel_consistency
= 1;
806 net
->ipv6
.sysctl
.auto_flowlabels
= IP6_DEFAULT_AUTO_FLOW_LABELS
;
807 net
->ipv6
.sysctl
.idgen_retries
= 3;
808 net
->ipv6
.sysctl
.idgen_delay
= 1 * HZ
;
809 net
->ipv6
.sysctl
.flowlabel_state_ranges
= 0;
810 atomic_set(&net
->ipv6
.fib6_sernum
, 1);
812 err
= ipv6_init_mibs(net
);
815 #ifdef CONFIG_PROC_FS
816 err
= udp6_proc_init(net
);
819 err
= tcp6_proc_init(net
);
822 err
= ac6_proc_init(net
);
828 #ifdef CONFIG_PROC_FS
834 ipv6_cleanup_mibs(net
);
839 static void __net_exit
inet6_net_exit(struct net
*net
)
841 #ifdef CONFIG_PROC_FS
846 ipv6_cleanup_mibs(net
);
849 static struct pernet_operations inet6_net_ops
= {
850 .init
= inet6_net_init
,
851 .exit
= inet6_net_exit
,
854 static const struct ipv6_stub ipv6_stub_impl
= {
855 .ipv6_sock_mc_join
= ipv6_sock_mc_join
,
856 .ipv6_sock_mc_drop
= ipv6_sock_mc_drop
,
857 .ipv6_dst_lookup
= ip6_dst_lookup
,
858 .udpv6_encap_enable
= udpv6_encap_enable
,
859 .ndisc_send_na
= ndisc_send_na
,
863 static int __init
inet6_init(void)
868 sock_skb_cb_check_size(sizeof(struct inet6_skb_parm
));
870 /* Register the socket-side information for inet6_create. */
871 for (r
= &inetsw6
[0]; r
< &inetsw6
[SOCK_MAX
]; ++r
)
874 if (disable_ipv6_mod
) {
875 pr_info("Loaded, but administratively disabled, reboot required to enable\n");
879 err
= proto_register(&tcpv6_prot
, 1);
883 err
= proto_register(&udpv6_prot
, 1);
885 goto out_unregister_tcp_proto
;
887 err
= proto_register(&udplitev6_prot
, 1);
889 goto out_unregister_udp_proto
;
891 err
= proto_register(&rawv6_prot
, 1);
893 goto out_unregister_udplite_proto
;
895 err
= proto_register(&pingv6_prot
, 1);
897 goto out_unregister_ping_proto
;
899 /* We MUST register RAW sockets before we create the ICMP6,
900 * IGMP6, or NDISC control sockets.
904 goto out_unregister_raw_proto
;
906 /* Register the family here so that the init calls below will
907 * be able to create sockets. (?? is this dangerous ??)
909 err
= sock_register(&inet6_family_ops
);
911 goto out_sock_register_fail
;
914 * ipngwg API draft makes clear that the correct semantics
915 * for TCP and UDP is to consider one TCP and UDP instance
916 * in a host available by both INET and INET6 APIs and
917 * able to communicate via both network protocols.
920 err
= register_pernet_subsys(&inet6_net_ops
);
922 goto register_pernet_fail
;
936 err
= ipv6_netfilter_init();
939 /* Create /proc/foo6 entries. */
940 #ifdef CONFIG_PROC_FS
942 if (raw6_proc_init())
944 if (udplite6_proc_init())
945 goto proc_udplite6_fail
;
946 if (ipv6_misc_proc_init())
947 goto proc_misc6_fail
;
951 err
= ip6_route_init();
954 err
= ndisc_late_init();
956 goto ndisc_late_fail
;
957 err
= ip6_flowlabel_init();
959 goto ip6_flowlabel_fail
;
960 err
= addrconf_init();
964 /* Init v6 extension headers. */
965 err
= ipv6_exthdrs_init();
967 goto ipv6_exthdrs_fail
;
969 err
= ipv6_frag_init();
973 /* Init v6 transport protocols. */
978 err
= udplitev6_init();
982 err
= udpv6_offload_init();
984 goto udpv6_offload_fail
;
990 err
= ipv6_packet_init();
992 goto ipv6_packet_fail
;
998 err
= calipso_init();
1006 err
= igmp6_late_init();
1008 goto igmp6_late_err
;
1010 #ifdef CONFIG_SYSCTL
1011 err
= ipv6_sysctl_register();
1016 /* ensure that ipv6 stubs are visible only after ipv6 is ready */
1018 ipv6_stub
= &ipv6_stub_impl
;
1022 #ifdef CONFIG_SYSCTL
1024 igmp6_late_cleanup();
1033 ipv6_packet_cleanup();
1037 udpv6_offload_exit();
1045 ipv6_exthdrs_exit();
1049 ip6_flowlabel_cleanup();
1051 ndisc_late_cleanup();
1053 ip6_route_cleanup();
1055 #ifdef CONFIG_PROC_FS
1058 ipv6_misc_proc_exit();
1060 udplite6_proc_exit();
1065 ipv6_netfilter_fini();
1073 unregister_pernet_subsys(&inet6_net_ops
);
1076 register_pernet_fail
:
1077 sock_unregister(PF_INET6
);
1078 rtnl_unregister_all(PF_INET6
);
1079 out_sock_register_fail
:
1081 out_unregister_ping_proto
:
1082 proto_unregister(&pingv6_prot
);
1083 out_unregister_raw_proto
:
1084 proto_unregister(&rawv6_prot
);
1085 out_unregister_udplite_proto
:
1086 proto_unregister(&udplitev6_prot
);
1087 out_unregister_udp_proto
:
1088 proto_unregister(&udpv6_prot
);
1089 out_unregister_tcp_proto
:
1090 proto_unregister(&tcpv6_prot
);
1093 module_init(inet6_init
);
1095 MODULE_ALIAS_NETPROTO(PF_INET6
);