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
->repflow
= net
->ipv6
.sysctl
.flowlabel_reflect
;
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
);
276 static int __inet6_bind(struct sock
*sk
, struct sockaddr
*uaddr
, int addr_len
,
277 bool force_bind_address_no_port
, bool with_lock
)
279 struct sockaddr_in6
*addr
= (struct sockaddr_in6
*)uaddr
;
280 struct inet_sock
*inet
= inet_sk(sk
);
281 struct ipv6_pinfo
*np
= inet6_sk(sk
);
282 struct net
*net
= sock_net(sk
);
289 if (addr
->sin6_family
!= AF_INET6
)
290 return -EAFNOSUPPORT
;
292 addr_type
= ipv6_addr_type(&addr
->sin6_addr
);
293 if ((addr_type
& IPV6_ADDR_MULTICAST
) && sk
->sk_type
== SOCK_STREAM
)
296 snum
= ntohs(addr
->sin6_port
);
297 if (snum
&& snum
< inet_prot_sock(net
) &&
298 !ns_capable(net
->user_ns
, CAP_NET_BIND_SERVICE
))
304 /* Check these errors (active socket, double bind). */
305 if (sk
->sk_state
!= TCP_CLOSE
|| inet
->inet_num
) {
310 /* Check if the address belongs to the host. */
311 if (addr_type
== IPV6_ADDR_MAPPED
) {
314 /* Binding to v4-mapped address on a v6-only socket
317 if (sk
->sk_ipv6only
) {
322 /* Reproduce AF_INET checks to make the bindings consistent */
323 v4addr
= addr
->sin6_addr
.s6_addr32
[3];
324 chk_addr_ret
= inet_addr_type(net
, v4addr
);
325 if (!net
->ipv4
.sysctl_ip_nonlocal_bind
&&
326 !(inet
->freebind
|| inet
->transparent
) &&
327 v4addr
!= htonl(INADDR_ANY
) &&
328 chk_addr_ret
!= RTN_LOCAL
&&
329 chk_addr_ret
!= RTN_MULTICAST
&&
330 chk_addr_ret
!= RTN_BROADCAST
) {
331 err
= -EADDRNOTAVAIL
;
335 if (addr_type
!= IPV6_ADDR_ANY
) {
336 struct net_device
*dev
= NULL
;
339 if (__ipv6_addr_needs_scope_id(addr_type
)) {
340 if (addr_len
>= sizeof(struct sockaddr_in6
) &&
341 addr
->sin6_scope_id
) {
342 /* Override any existing binding, if another one
343 * is supplied by user.
345 sk
->sk_bound_dev_if
= addr
->sin6_scope_id
;
348 /* Binding to link-local address requires an interface */
349 if (!sk
->sk_bound_dev_if
) {
353 dev
= dev_get_by_index_rcu(net
, sk
->sk_bound_dev_if
);
360 /* ipv4 addr of the socket is invalid. Only the
361 * unspecified and mapped address have a v4 equivalent.
363 v4addr
= LOOPBACK4_IPV6
;
364 if (!(addr_type
& IPV6_ADDR_MULTICAST
)) {
365 if (!net
->ipv6
.sysctl
.ip_nonlocal_bind
&&
366 !(inet
->freebind
|| inet
->transparent
) &&
367 !ipv6_chk_addr(net
, &addr
->sin6_addr
,
369 err
= -EADDRNOTAVAIL
;
377 inet
->inet_rcv_saddr
= v4addr
;
378 inet
->inet_saddr
= v4addr
;
380 sk
->sk_v6_rcv_saddr
= addr
->sin6_addr
;
382 if (!(addr_type
& IPV6_ADDR_MULTICAST
))
383 np
->saddr
= addr
->sin6_addr
;
385 saved_ipv6only
= sk
->sk_ipv6only
;
386 if (addr_type
!= IPV6_ADDR_ANY
&& addr_type
!= IPV6_ADDR_MAPPED
)
389 /* Make sure we are allowed to bind here. */
390 if (snum
|| !(inet
->bind_address_no_port
||
391 force_bind_address_no_port
)) {
392 if (sk
->sk_prot
->get_port(sk
, snum
)) {
393 sk
->sk_ipv6only
= saved_ipv6only
;
394 inet_reset_saddr(sk
);
398 err
= BPF_CGROUP_RUN_PROG_INET6_POST_BIND(sk
);
400 sk
->sk_ipv6only
= saved_ipv6only
;
401 inet_reset_saddr(sk
);
406 if (addr_type
!= IPV6_ADDR_ANY
)
407 sk
->sk_userlocks
|= SOCK_BINDADDR_LOCK
;
409 sk
->sk_userlocks
|= SOCK_BINDPORT_LOCK
;
410 inet
->inet_sport
= htons(inet
->inet_num
);
411 inet
->inet_dport
= 0;
412 inet
->inet_daddr
= 0;
422 /* bind for INET6 API */
423 int inet6_bind(struct socket
*sock
, struct sockaddr
*uaddr
, int addr_len
)
425 struct sock
*sk
= sock
->sk
;
428 /* If the socket has its own bind function then use it. */
429 if (sk
->sk_prot
->bind
)
430 return sk
->sk_prot
->bind(sk
, uaddr
, addr_len
);
432 if (addr_len
< SIN6_LEN_RFC2133
)
435 /* BPF prog is run before any checks are done so that if the prog
436 * changes context in a wrong way it will be caught.
438 err
= BPF_CGROUP_RUN_PROG_INET6_BIND(sk
, uaddr
);
442 return __inet6_bind(sk
, uaddr
, addr_len
, false, true);
444 EXPORT_SYMBOL(inet6_bind
);
446 int inet6_release(struct socket
*sock
)
448 struct sock
*sk
= sock
->sk
;
454 ipv6_sock_mc_close(sk
);
457 ipv6_sock_ac_close(sk
);
459 return inet_release(sock
);
461 EXPORT_SYMBOL(inet6_release
);
463 void inet6_destroy_sock(struct sock
*sk
)
465 struct ipv6_pinfo
*np
= inet6_sk(sk
);
467 struct ipv6_txoptions
*opt
;
469 /* Release rx options */
471 skb
= xchg(&np
->pktoptions
, NULL
);
475 skb
= xchg(&np
->rxpmtu
, NULL
);
479 /* Free flowlabels */
480 fl6_free_socklist(sk
);
482 /* Free tx options */
484 opt
= xchg((__force
struct ipv6_txoptions
**)&np
->opt
, NULL
);
486 atomic_sub(opt
->tot_len
, &sk
->sk_omem_alloc
);
490 EXPORT_SYMBOL_GPL(inet6_destroy_sock
);
493 * This does both peername and sockname.
496 int inet6_getname(struct socket
*sock
, struct sockaddr
*uaddr
,
499 struct sockaddr_in6
*sin
= (struct sockaddr_in6
*)uaddr
;
500 struct sock
*sk
= sock
->sk
;
501 struct inet_sock
*inet
= inet_sk(sk
);
502 struct ipv6_pinfo
*np
= inet6_sk(sk
);
504 sin
->sin6_family
= AF_INET6
;
505 sin
->sin6_flowinfo
= 0;
506 sin
->sin6_scope_id
= 0;
508 if (!inet
->inet_dport
)
510 if (((1 << sk
->sk_state
) & (TCPF_CLOSE
| TCPF_SYN_SENT
)) &&
513 sin
->sin6_port
= inet
->inet_dport
;
514 sin
->sin6_addr
= sk
->sk_v6_daddr
;
516 sin
->sin6_flowinfo
= np
->flow_label
;
518 if (ipv6_addr_any(&sk
->sk_v6_rcv_saddr
))
519 sin
->sin6_addr
= np
->saddr
;
521 sin
->sin6_addr
= sk
->sk_v6_rcv_saddr
;
523 sin
->sin6_port
= inet
->inet_sport
;
525 sin
->sin6_scope_id
= ipv6_iface_scope_id(&sin
->sin6_addr
,
526 sk
->sk_bound_dev_if
);
529 EXPORT_SYMBOL(inet6_getname
);
531 int inet6_ioctl(struct socket
*sock
, unsigned int cmd
, unsigned long arg
)
533 struct sock
*sk
= sock
->sk
;
534 struct net
*net
= sock_net(sk
);
538 return sock_get_timestamp(sk
, (struct timeval __user
*)arg
);
541 return sock_get_timestampns(sk
, (struct timespec __user
*)arg
);
546 return ipv6_route_ioctl(net
, cmd
, (void __user
*)arg
);
549 return addrconf_add_ifaddr(net
, (void __user
*) arg
);
551 return addrconf_del_ifaddr(net
, (void __user
*) arg
);
553 return addrconf_set_dstaddr(net
, (void __user
*) arg
);
555 if (!sk
->sk_prot
->ioctl
)
557 return sk
->sk_prot
->ioctl(sk
, cmd
, arg
);
562 EXPORT_SYMBOL(inet6_ioctl
);
564 const struct proto_ops inet6_stream_ops
= {
566 .owner
= THIS_MODULE
,
567 .release
= inet6_release
,
569 .connect
= inet_stream_connect
, /* ok */
570 .socketpair
= sock_no_socketpair
, /* a do nothing */
571 .accept
= inet_accept
, /* ok */
572 .getname
= inet6_getname
,
573 .poll
= tcp_poll
, /* ok */
574 .ioctl
= inet6_ioctl
, /* must change */
575 .listen
= inet_listen
, /* ok */
576 .shutdown
= inet_shutdown
, /* ok */
577 .setsockopt
= sock_common_setsockopt
, /* ok */
578 .getsockopt
= sock_common_getsockopt
, /* ok */
579 .sendmsg
= inet_sendmsg
, /* ok */
580 .recvmsg
= inet_recvmsg
, /* ok */
584 .sendpage
= inet_sendpage
,
585 .sendmsg_locked
= tcp_sendmsg_locked
,
586 .sendpage_locked
= tcp_sendpage_locked
,
587 .splice_read
= tcp_splice_read
,
588 .read_sock
= tcp_read_sock
,
589 .peek_len
= tcp_peek_len
,
591 .compat_setsockopt
= compat_sock_common_setsockopt
,
592 .compat_getsockopt
= compat_sock_common_getsockopt
,
594 .set_rcvlowat
= tcp_set_rcvlowat
,
597 const struct proto_ops inet6_dgram_ops
= {
599 .owner
= THIS_MODULE
,
600 .release
= inet6_release
,
602 .connect
= inet_dgram_connect
, /* ok */
603 .socketpair
= sock_no_socketpair
, /* a do nothing */
604 .accept
= sock_no_accept
, /* a do nothing */
605 .getname
= inet6_getname
,
606 .poll
= udp_poll
, /* ok */
607 .ioctl
= inet6_ioctl
, /* must change */
608 .listen
= sock_no_listen
, /* ok */
609 .shutdown
= inet_shutdown
, /* ok */
610 .setsockopt
= sock_common_setsockopt
, /* ok */
611 .getsockopt
= sock_common_getsockopt
, /* ok */
612 .sendmsg
= inet_sendmsg
, /* ok */
613 .recvmsg
= inet_recvmsg
, /* ok */
614 .mmap
= sock_no_mmap
,
615 .sendpage
= sock_no_sendpage
,
616 .set_peek_off
= sk_set_peek_off
,
618 .compat_setsockopt
= compat_sock_common_setsockopt
,
619 .compat_getsockopt
= compat_sock_common_getsockopt
,
623 static const struct net_proto_family inet6_family_ops
= {
625 .create
= inet6_create
,
626 .owner
= THIS_MODULE
,
629 int inet6_register_protosw(struct inet_protosw
*p
)
631 struct list_head
*lh
;
632 struct inet_protosw
*answer
;
633 struct list_head
*last_perm
;
634 int protocol
= p
->protocol
;
637 spin_lock_bh(&inetsw6_lock
);
640 if (p
->type
>= SOCK_MAX
)
643 /* If we are trying to override a permanent protocol, bail. */
646 last_perm
= &inetsw6
[p
->type
];
647 list_for_each(lh
, &inetsw6
[p
->type
]) {
648 answer
= list_entry(lh
, struct inet_protosw
, list
);
650 /* Check only the non-wild match. */
651 if (INET_PROTOSW_PERMANENT
& answer
->flags
) {
652 if (protocol
== answer
->protocol
)
662 /* Add the new entry after the last permanent entry if any, so that
663 * the new entry does not override a permanent entry when matched with
664 * a wild-card protocol. But it is allowed to override any existing
665 * non-permanent entry. This means that when we remove this entry, the
666 * system automatically returns to the old behavior.
668 list_add_rcu(&p
->list
, last_perm
);
671 spin_unlock_bh(&inetsw6_lock
);
675 pr_err("Attempt to override permanent protocol %d\n", protocol
);
679 pr_err("Ignoring attempt to register invalid socket type %d\n",
683 EXPORT_SYMBOL(inet6_register_protosw
);
686 inet6_unregister_protosw(struct inet_protosw
*p
)
688 if (INET_PROTOSW_PERMANENT
& p
->flags
) {
689 pr_err("Attempt to unregister permanent protocol %d\n",
692 spin_lock_bh(&inetsw6_lock
);
693 list_del_rcu(&p
->list
);
694 spin_unlock_bh(&inetsw6_lock
);
699 EXPORT_SYMBOL(inet6_unregister_protosw
);
701 int inet6_sk_rebuild_header(struct sock
*sk
)
703 struct ipv6_pinfo
*np
= inet6_sk(sk
);
704 struct dst_entry
*dst
;
706 dst
= __sk_dst_check(sk
, np
->dst_cookie
);
709 struct inet_sock
*inet
= inet_sk(sk
);
710 struct in6_addr
*final_p
, final
;
713 memset(&fl6
, 0, sizeof(fl6
));
714 fl6
.flowi6_proto
= sk
->sk_protocol
;
715 fl6
.daddr
= sk
->sk_v6_daddr
;
716 fl6
.saddr
= np
->saddr
;
717 fl6
.flowlabel
= np
->flow_label
;
718 fl6
.flowi6_oif
= sk
->sk_bound_dev_if
;
719 fl6
.flowi6_mark
= sk
->sk_mark
;
720 fl6
.fl6_dport
= inet
->inet_dport
;
721 fl6
.fl6_sport
= inet
->inet_sport
;
722 fl6
.flowi6_uid
= sk
->sk_uid
;
723 security_sk_classify_flow(sk
, flowi6_to_flowi(&fl6
));
726 final_p
= fl6_update_dst(&fl6
, rcu_dereference(np
->opt
),
730 dst
= ip6_dst_lookup_flow(sk
, &fl6
, final_p
);
732 sk
->sk_route_caps
= 0;
733 sk
->sk_err_soft
= -PTR_ERR(dst
);
737 ip6_dst_store(sk
, dst
, NULL
, NULL
);
742 EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header
);
744 bool ipv6_opt_accepted(const struct sock
*sk
, const struct sk_buff
*skb
,
745 const struct inet6_skb_parm
*opt
)
747 const struct ipv6_pinfo
*np
= inet6_sk(sk
);
750 if (((opt
->flags
& IP6SKB_HOPBYHOP
) &&
751 (np
->rxopt
.bits
.hopopts
|| np
->rxopt
.bits
.ohopopts
)) ||
752 (ip6_flowinfo((struct ipv6hdr
*) skb_network_header(skb
)) &&
753 np
->rxopt
.bits
.rxflow
) ||
754 (opt
->srcrt
&& (np
->rxopt
.bits
.srcrt
||
755 np
->rxopt
.bits
.osrcrt
)) ||
756 ((opt
->dst1
|| opt
->dst0
) &&
757 (np
->rxopt
.bits
.dstopts
|| np
->rxopt
.bits
.odstopts
)))
762 EXPORT_SYMBOL_GPL(ipv6_opt_accepted
);
764 static struct packet_type ipv6_packet_type __read_mostly
= {
765 .type
= cpu_to_be16(ETH_P_IPV6
),
769 static int __init
ipv6_packet_init(void)
771 dev_add_pack(&ipv6_packet_type
);
775 static void ipv6_packet_cleanup(void)
777 dev_remove_pack(&ipv6_packet_type
);
780 static int __net_init
ipv6_init_mibs(struct net
*net
)
784 net
->mib
.udp_stats_in6
= alloc_percpu(struct udp_mib
);
785 if (!net
->mib
.udp_stats_in6
)
787 net
->mib
.udplite_stats_in6
= alloc_percpu(struct udp_mib
);
788 if (!net
->mib
.udplite_stats_in6
)
789 goto err_udplite_mib
;
790 net
->mib
.ipv6_statistics
= alloc_percpu(struct ipstats_mib
);
791 if (!net
->mib
.ipv6_statistics
)
794 for_each_possible_cpu(i
) {
795 struct ipstats_mib
*af_inet6_stats
;
796 af_inet6_stats
= per_cpu_ptr(net
->mib
.ipv6_statistics
, i
);
797 u64_stats_init(&af_inet6_stats
->syncp
);
801 net
->mib
.icmpv6_statistics
= alloc_percpu(struct icmpv6_mib
);
802 if (!net
->mib
.icmpv6_statistics
)
804 net
->mib
.icmpv6msg_statistics
= kzalloc(sizeof(struct icmpv6msg_mib
),
806 if (!net
->mib
.icmpv6msg_statistics
)
807 goto err_icmpmsg_mib
;
811 free_percpu(net
->mib
.icmpv6_statistics
);
813 free_percpu(net
->mib
.ipv6_statistics
);
815 free_percpu(net
->mib
.udplite_stats_in6
);
817 free_percpu(net
->mib
.udp_stats_in6
);
821 static void ipv6_cleanup_mibs(struct net
*net
)
823 free_percpu(net
->mib
.udp_stats_in6
);
824 free_percpu(net
->mib
.udplite_stats_in6
);
825 free_percpu(net
->mib
.ipv6_statistics
);
826 free_percpu(net
->mib
.icmpv6_statistics
);
827 kfree(net
->mib
.icmpv6msg_statistics
);
830 static int __net_init
inet6_net_init(struct net
*net
)
834 net
->ipv6
.sysctl
.bindv6only
= 0;
835 net
->ipv6
.sysctl
.icmpv6_time
= 1*HZ
;
836 net
->ipv6
.sysctl
.flowlabel_consistency
= 1;
837 net
->ipv6
.sysctl
.auto_flowlabels
= IP6_DEFAULT_AUTO_FLOW_LABELS
;
838 net
->ipv6
.sysctl
.idgen_retries
= 3;
839 net
->ipv6
.sysctl
.idgen_delay
= 1 * HZ
;
840 net
->ipv6
.sysctl
.flowlabel_state_ranges
= 0;
841 net
->ipv6
.sysctl
.max_dst_opts_cnt
= IP6_DEFAULT_MAX_DST_OPTS_CNT
;
842 net
->ipv6
.sysctl
.max_hbh_opts_cnt
= IP6_DEFAULT_MAX_HBH_OPTS_CNT
;
843 net
->ipv6
.sysctl
.max_dst_opts_len
= IP6_DEFAULT_MAX_DST_OPTS_LEN
;
844 net
->ipv6
.sysctl
.max_hbh_opts_len
= IP6_DEFAULT_MAX_HBH_OPTS_LEN
;
845 atomic_set(&net
->ipv6
.fib6_sernum
, 1);
847 err
= ipv6_init_mibs(net
);
850 #ifdef CONFIG_PROC_FS
851 err
= udp6_proc_init(net
);
854 err
= tcp6_proc_init(net
);
857 err
= ac6_proc_init(net
);
863 #ifdef CONFIG_PROC_FS
869 ipv6_cleanup_mibs(net
);
874 static void __net_exit
inet6_net_exit(struct net
*net
)
876 #ifdef CONFIG_PROC_FS
881 ipv6_cleanup_mibs(net
);
884 static struct pernet_operations inet6_net_ops
= {
885 .init
= inet6_net_init
,
886 .exit
= inet6_net_exit
,
889 static const struct ipv6_stub ipv6_stub_impl
= {
890 .ipv6_sock_mc_join
= ipv6_sock_mc_join
,
891 .ipv6_sock_mc_drop
= ipv6_sock_mc_drop
,
892 .ipv6_dst_lookup
= ip6_dst_lookup
,
893 .fib6_get_table
= fib6_get_table
,
894 .fib6_table_lookup
= fib6_table_lookup
,
895 .fib6_lookup
= fib6_lookup
,
896 .fib6_multipath_select
= fib6_multipath_select
,
897 .ip6_mtu_from_fib6
= ip6_mtu_from_fib6
,
898 .udpv6_encap_enable
= udpv6_encap_enable
,
899 .ndisc_send_na
= ndisc_send_na
,
903 static const struct ipv6_bpf_stub ipv6_bpf_stub_impl
= {
904 .inet6_bind
= __inet6_bind
,
907 static int __init
inet6_init(void)
912 sock_skb_cb_check_size(sizeof(struct inet6_skb_parm
));
914 /* Register the socket-side information for inet6_create. */
915 for (r
= &inetsw6
[0]; r
< &inetsw6
[SOCK_MAX
]; ++r
)
918 if (disable_ipv6_mod
) {
919 pr_info("Loaded, but administratively disabled, reboot required to enable\n");
923 err
= proto_register(&tcpv6_prot
, 1);
927 err
= proto_register(&udpv6_prot
, 1);
929 goto out_unregister_tcp_proto
;
931 err
= proto_register(&udplitev6_prot
, 1);
933 goto out_unregister_udp_proto
;
935 err
= proto_register(&rawv6_prot
, 1);
937 goto out_unregister_udplite_proto
;
939 err
= proto_register(&pingv6_prot
, 1);
941 goto out_unregister_ping_proto
;
943 /* We MUST register RAW sockets before we create the ICMP6,
944 * IGMP6, or NDISC control sockets.
948 goto out_unregister_raw_proto
;
950 /* Register the family here so that the init calls below will
951 * be able to create sockets. (?? is this dangerous ??)
953 err
= sock_register(&inet6_family_ops
);
955 goto out_sock_register_fail
;
958 * ipngwg API draft makes clear that the correct semantics
959 * for TCP and UDP is to consider one TCP and UDP instance
960 * in a host available by both INET and INET6 APIs and
961 * able to communicate via both network protocols.
964 err
= register_pernet_subsys(&inet6_net_ops
);
966 goto register_pernet_fail
;
980 err
= ipv6_netfilter_init();
983 /* Create /proc/foo6 entries. */
984 #ifdef CONFIG_PROC_FS
986 if (raw6_proc_init())
988 if (udplite6_proc_init())
989 goto proc_udplite6_fail
;
990 if (ipv6_misc_proc_init())
991 goto proc_misc6_fail
;
995 err
= ip6_route_init();
998 err
= ndisc_late_init();
1000 goto ndisc_late_fail
;
1001 err
= ip6_flowlabel_init();
1003 goto ip6_flowlabel_fail
;
1004 err
= addrconf_init();
1008 /* Init v6 extension headers. */
1009 err
= ipv6_exthdrs_init();
1011 goto ipv6_exthdrs_fail
;
1013 err
= ipv6_frag_init();
1015 goto ipv6_frag_fail
;
1017 /* Init v6 transport protocols. */
1022 err
= udplitev6_init();
1024 goto udplitev6_fail
;
1026 err
= udpv6_offload_init();
1028 goto udpv6_offload_fail
;
1034 err
= ipv6_packet_init();
1036 goto ipv6_packet_fail
;
1038 err
= pingv6_init();
1042 err
= calipso_init();
1050 err
= igmp6_late_init();
1052 goto igmp6_late_err
;
1054 #ifdef CONFIG_SYSCTL
1055 err
= ipv6_sysctl_register();
1060 /* ensure that ipv6 stubs are visible only after ipv6 is ready */
1062 ipv6_stub
= &ipv6_stub_impl
;
1063 ipv6_bpf_stub
= &ipv6_bpf_stub_impl
;
1067 #ifdef CONFIG_SYSCTL
1069 igmp6_late_cleanup();
1078 ipv6_packet_cleanup();
1082 udpv6_offload_exit();
1090 ipv6_exthdrs_exit();
1094 ip6_flowlabel_cleanup();
1096 ndisc_late_cleanup();
1098 ip6_route_cleanup();
1100 #ifdef CONFIG_PROC_FS
1103 ipv6_misc_proc_exit();
1105 udplite6_proc_exit();
1110 ipv6_netfilter_fini();
1118 unregister_pernet_subsys(&inet6_net_ops
);
1121 register_pernet_fail
:
1122 sock_unregister(PF_INET6
);
1123 rtnl_unregister_all(PF_INET6
);
1124 out_sock_register_fail
:
1126 out_unregister_ping_proto
:
1127 proto_unregister(&pingv6_prot
);
1128 out_unregister_raw_proto
:
1129 proto_unregister(&rawv6_prot
);
1130 out_unregister_udplite_proto
:
1131 proto_unregister(&udplitev6_prot
);
1132 out_unregister_udp_proto
:
1133 proto_unregister(&udpv6_prot
);
1134 out_unregister_tcp_proto
:
1135 proto_unregister(&tcpv6_prot
);
1138 module_init(inet6_init
);
1140 MODULE_ALIAS_NETPROTO(PF_INET6
);