1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * PF_INET6 socket protocol family
4 * Linux INET6 implementation
7 * Pedro Roque <roque@di.fc.ul.pt>
9 * Adapted from linux/net/ipv4/af_inet.c
12 * piggy, Karl Knutson : Socket protocol table
13 * Hideaki YOSHIFUJI : sin6_scope_id support
14 * Arnaldo Melo : check proc_net_create return, cleanups
17 #define pr_fmt(fmt) "IPv6: " fmt
19 #include <linux/module.h>
20 #include <linux/capability.h>
21 #include <linux/errno.h>
22 #include <linux/types.h>
23 #include <linux/socket.h>
25 #include <linux/kernel.h>
26 #include <linux/timer.h>
27 #include <linux/string.h>
28 #include <linux/sockios.h>
29 #include <linux/net.h>
30 #include <linux/fcntl.h>
32 #include <linux/interrupt.h>
33 #include <linux/proc_fs.h>
34 #include <linux/stat.h>
35 #include <linux/init.h>
36 #include <linux/slab.h>
38 #include <linux/inet.h>
39 #include <linux/netdevice.h>
40 #include <linux/icmpv6.h>
41 #include <linux/netfilter_ipv6.h>
46 #include <net/udplite.h>
49 #include <net/protocol.h>
50 #include <net/inet_common.h>
51 #include <net/route.h>
52 #include <net/transp_v6.h>
53 #include <net/ip6_route.h>
54 #include <net/addrconf.h>
55 #include <net/ipv6_stubs.h>
56 #include <net/ndisc.h>
57 #ifdef CONFIG_IPV6_TUNNEL
58 #include <net/ip6_tunnel.h>
60 #include <net/calipso.h>
63 #include <linux/uaccess.h>
64 #include <linux/mroute6.h>
66 #include "ip6_offload.h"
68 MODULE_AUTHOR("Cast of dozens");
69 MODULE_DESCRIPTION("IPv6 protocol stack for Linux");
70 MODULE_LICENSE("GPL");
72 /* The inetsw6 table contains everything that inet6_create needs to
75 static struct list_head inetsw6
[SOCK_MAX
];
76 static DEFINE_SPINLOCK(inetsw6_lock
);
78 struct ipv6_params ipv6_defaults
= {
83 static int disable_ipv6_mod
;
85 module_param_named(disable
, disable_ipv6_mod
, int, 0444);
86 MODULE_PARM_DESC(disable
, "Disable IPv6 module such that it is non-functional");
88 module_param_named(disable_ipv6
, ipv6_defaults
.disable_ipv6
, int, 0444);
89 MODULE_PARM_DESC(disable_ipv6
, "Disable IPv6 on all interfaces");
91 module_param_named(autoconf
, ipv6_defaults
.autoconf
, int, 0444);
92 MODULE_PARM_DESC(autoconf
, "Enable IPv6 address autoconfiguration on all interfaces");
94 bool ipv6_mod_enabled(void)
96 return disable_ipv6_mod
== 0;
98 EXPORT_SYMBOL_GPL(ipv6_mod_enabled
);
100 static __inline__
struct ipv6_pinfo
*inet6_sk_generic(struct sock
*sk
)
102 const int offset
= sk
->sk_prot
->obj_size
- sizeof(struct ipv6_pinfo
);
104 return (struct ipv6_pinfo
*)(((u8
*)sk
) + offset
);
107 static int inet6_create(struct net
*net
, struct socket
*sock
, int protocol
,
110 struct inet_sock
*inet
;
111 struct ipv6_pinfo
*np
;
113 struct inet_protosw
*answer
;
114 struct proto
*answer_prot
;
115 unsigned char answer_flags
;
116 int try_loading_module
= 0;
119 if (protocol
< 0 || protocol
>= IPPROTO_MAX
)
122 /* Look for the requested type/protocol pair. */
124 err
= -ESOCKTNOSUPPORT
;
126 list_for_each_entry_rcu(answer
, &inetsw6
[sock
->type
], list
) {
129 /* Check the non-wild match. */
130 if (protocol
== answer
->protocol
) {
131 if (protocol
!= IPPROTO_IP
)
134 /* Check for the two wild cases. */
135 if (IPPROTO_IP
== protocol
) {
136 protocol
= answer
->protocol
;
139 if (IPPROTO_IP
== answer
->protocol
)
142 err
= -EPROTONOSUPPORT
;
146 if (try_loading_module
< 2) {
149 * Be more specific, e.g. net-pf-10-proto-132-type-1
150 * (net-pf-PF_INET6-proto-IPPROTO_SCTP-type-SOCK_STREAM)
152 if (++try_loading_module
== 1)
153 request_module("net-pf-%d-proto-%d-type-%d",
154 PF_INET6
, protocol
, sock
->type
);
156 * Fall back to generic, e.g. net-pf-10-proto-132
157 * (net-pf-PF_INET6-proto-IPPROTO_SCTP)
160 request_module("net-pf-%d-proto-%d",
162 goto lookup_protocol
;
168 if (sock
->type
== SOCK_RAW
&& !kern
&&
169 !ns_capable(net
->user_ns
, CAP_NET_RAW
))
172 sock
->ops
= answer
->ops
;
173 answer_prot
= answer
->prot
;
174 answer_flags
= answer
->flags
;
177 WARN_ON(!answer_prot
->slab
);
180 sk
= sk_alloc(net
, PF_INET6
, GFP_KERNEL
, answer_prot
, kern
);
184 sock_init_data(sock
, sk
);
187 if (INET_PROTOSW_REUSE
& answer_flags
)
188 sk
->sk_reuse
= SK_CAN_REUSE
;
191 inet
->is_icsk
= (INET_PROTOSW_ICSK
& answer_flags
) != 0;
193 if (SOCK_RAW
== sock
->type
) {
194 inet
->inet_num
= protocol
;
195 if (IPPROTO_RAW
== protocol
)
199 sk
->sk_destruct
= inet_sock_destruct
;
200 sk
->sk_family
= PF_INET6
;
201 sk
->sk_protocol
= protocol
;
203 sk
->sk_backlog_rcv
= answer
->prot
->backlog_rcv
;
205 inet_sk(sk
)->pinet6
= np
= inet6_sk_generic(sk
);
207 np
->mcast_hops
= IPV6_DEFAULT_MCASTHOPS
;
210 np
->pmtudisc
= IPV6_PMTUDISC_WANT
;
211 np
->repflow
= net
->ipv6
.sysctl
.flowlabel_reflect
& FLOWLABEL_REFLECT_ESTABLISHED
;
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
);
261 err
= BPF_CGROUP_RUN_PROG_INET_SOCK(sk
);
263 sk_common_release(sk
);
274 static int __inet6_bind(struct sock
*sk
, struct sockaddr
*uaddr
, int addr_len
,
275 bool force_bind_address_no_port
, bool with_lock
)
277 struct sockaddr_in6
*addr
= (struct sockaddr_in6
*)uaddr
;
278 struct inet_sock
*inet
= inet_sk(sk
);
279 struct ipv6_pinfo
*np
= inet6_sk(sk
);
280 struct net
*net
= sock_net(sk
);
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
) && sk
->sk_type
== SOCK_STREAM
)
294 snum
= ntohs(addr
->sin6_port
);
295 if (snum
&& inet_port_requires_bind_service(net
, snum
) &&
296 !ns_capable(net
->user_ns
, CAP_NET_BIND_SERVICE
))
302 /* Check these errors (active socket, double bind). */
303 if (sk
->sk_state
!= TCP_CLOSE
|| inet
->inet_num
) {
308 /* Check if the address belongs to the host. */
309 if (addr_type
== IPV6_ADDR_MAPPED
) {
310 struct net_device
*dev
= NULL
;
313 /* Binding to v4-mapped address on a v6-only socket
316 if (sk
->sk_ipv6only
) {
322 if (sk
->sk_bound_dev_if
) {
323 dev
= dev_get_by_index_rcu(net
, sk
->sk_bound_dev_if
);
330 /* Reproduce AF_INET checks to make the bindings consistent */
331 v4addr
= addr
->sin6_addr
.s6_addr32
[3];
332 chk_addr_ret
= inet_addr_type_dev_table(net
, dev
, v4addr
);
335 if (!inet_can_nonlocal_bind(net
, inet
) &&
336 v4addr
!= htonl(INADDR_ANY
) &&
337 chk_addr_ret
!= RTN_LOCAL
&&
338 chk_addr_ret
!= RTN_MULTICAST
&&
339 chk_addr_ret
!= RTN_BROADCAST
) {
340 err
= -EADDRNOTAVAIL
;
344 if (addr_type
!= IPV6_ADDR_ANY
) {
345 struct net_device
*dev
= NULL
;
348 if (__ipv6_addr_needs_scope_id(addr_type
)) {
349 if (addr_len
>= sizeof(struct sockaddr_in6
) &&
350 addr
->sin6_scope_id
) {
351 /* Override any existing binding, if another one
352 * is supplied by user.
354 sk
->sk_bound_dev_if
= addr
->sin6_scope_id
;
357 /* Binding to link-local address requires an interface */
358 if (!sk
->sk_bound_dev_if
) {
364 if (sk
->sk_bound_dev_if
) {
365 dev
= dev_get_by_index_rcu(net
, sk
->sk_bound_dev_if
);
372 /* ipv4 addr of the socket is invalid. Only the
373 * unspecified and mapped address have a v4 equivalent.
375 v4addr
= LOOPBACK4_IPV6
;
376 if (!(addr_type
& IPV6_ADDR_MULTICAST
)) {
377 if (!ipv6_can_nonlocal_bind(net
, inet
) &&
378 !ipv6_chk_addr(net
, &addr
->sin6_addr
,
380 err
= -EADDRNOTAVAIL
;
388 inet
->inet_rcv_saddr
= v4addr
;
389 inet
->inet_saddr
= v4addr
;
391 sk
->sk_v6_rcv_saddr
= addr
->sin6_addr
;
393 if (!(addr_type
& IPV6_ADDR_MULTICAST
))
394 np
->saddr
= addr
->sin6_addr
;
396 saved_ipv6only
= sk
->sk_ipv6only
;
397 if (addr_type
!= IPV6_ADDR_ANY
&& addr_type
!= IPV6_ADDR_MAPPED
)
400 /* Make sure we are allowed to bind here. */
401 if (snum
|| !(inet
->bind_address_no_port
||
402 force_bind_address_no_port
)) {
403 if (sk
->sk_prot
->get_port(sk
, snum
)) {
404 sk
->sk_ipv6only
= saved_ipv6only
;
405 inet_reset_saddr(sk
);
409 err
= BPF_CGROUP_RUN_PROG_INET6_POST_BIND(sk
);
411 sk
->sk_ipv6only
= saved_ipv6only
;
412 inet_reset_saddr(sk
);
417 if (addr_type
!= IPV6_ADDR_ANY
)
418 sk
->sk_userlocks
|= SOCK_BINDADDR_LOCK
;
420 sk
->sk_userlocks
|= SOCK_BINDPORT_LOCK
;
421 inet
->inet_sport
= htons(inet
->inet_num
);
422 inet
->inet_dport
= 0;
423 inet
->inet_daddr
= 0;
433 /* bind for INET6 API */
434 int inet6_bind(struct socket
*sock
, struct sockaddr
*uaddr
, int addr_len
)
436 struct sock
*sk
= sock
->sk
;
439 /* If the socket has its own bind function then use it. */
440 if (sk
->sk_prot
->bind
)
441 return sk
->sk_prot
->bind(sk
, uaddr
, addr_len
);
443 if (addr_len
< SIN6_LEN_RFC2133
)
446 /* BPF prog is run before any checks are done so that if the prog
447 * changes context in a wrong way it will be caught.
449 err
= BPF_CGROUP_RUN_PROG_INET6_BIND(sk
, uaddr
);
453 return __inet6_bind(sk
, uaddr
, addr_len
, false, true);
455 EXPORT_SYMBOL(inet6_bind
);
457 int inet6_release(struct socket
*sock
)
459 struct sock
*sk
= sock
->sk
;
465 ipv6_sock_mc_close(sk
);
468 ipv6_sock_ac_close(sk
);
470 return inet_release(sock
);
472 EXPORT_SYMBOL(inet6_release
);
474 void inet6_destroy_sock(struct sock
*sk
)
476 struct ipv6_pinfo
*np
= inet6_sk(sk
);
478 struct ipv6_txoptions
*opt
;
480 /* Release rx options */
482 skb
= xchg(&np
->pktoptions
, NULL
);
485 skb
= xchg(&np
->rxpmtu
, NULL
);
488 /* Free flowlabels */
489 fl6_free_socklist(sk
);
491 /* Free tx options */
493 opt
= xchg((__force
struct ipv6_txoptions
**)&np
->opt
, NULL
);
495 atomic_sub(opt
->tot_len
, &sk
->sk_omem_alloc
);
499 EXPORT_SYMBOL_GPL(inet6_destroy_sock
);
502 * This does both peername and sockname.
505 int inet6_getname(struct socket
*sock
, struct sockaddr
*uaddr
,
508 struct sockaddr_in6
*sin
= (struct sockaddr_in6
*)uaddr
;
509 struct sock
*sk
= sock
->sk
;
510 struct inet_sock
*inet
= inet_sk(sk
);
511 struct ipv6_pinfo
*np
= inet6_sk(sk
);
513 sin
->sin6_family
= AF_INET6
;
514 sin
->sin6_flowinfo
= 0;
515 sin
->sin6_scope_id
= 0;
517 if (!inet
->inet_dport
)
519 if (((1 << sk
->sk_state
) & (TCPF_CLOSE
| TCPF_SYN_SENT
)) &&
522 sin
->sin6_port
= inet
->inet_dport
;
523 sin
->sin6_addr
= sk
->sk_v6_daddr
;
525 sin
->sin6_flowinfo
= np
->flow_label
;
527 if (ipv6_addr_any(&sk
->sk_v6_rcv_saddr
))
528 sin
->sin6_addr
= np
->saddr
;
530 sin
->sin6_addr
= sk
->sk_v6_rcv_saddr
;
532 sin
->sin6_port
= inet
->inet_sport
;
534 sin
->sin6_scope_id
= ipv6_iface_scope_id(&sin
->sin6_addr
,
535 sk
->sk_bound_dev_if
);
538 EXPORT_SYMBOL(inet6_getname
);
540 int inet6_ioctl(struct socket
*sock
, unsigned int cmd
, unsigned long arg
)
542 struct sock
*sk
= sock
->sk
;
543 struct net
*net
= sock_net(sk
);
549 return ipv6_route_ioctl(net
, cmd
, (void __user
*)arg
);
552 return addrconf_add_ifaddr(net
, (void __user
*) arg
);
554 return addrconf_del_ifaddr(net
, (void __user
*) arg
);
556 return addrconf_set_dstaddr(net
, (void __user
*) arg
);
558 if (!sk
->sk_prot
->ioctl
)
560 return sk
->sk_prot
->ioctl(sk
, cmd
, arg
);
565 EXPORT_SYMBOL(inet6_ioctl
);
567 INDIRECT_CALLABLE_DECLARE(int udpv6_sendmsg(struct sock
*, struct msghdr
*,
569 int inet6_sendmsg(struct socket
*sock
, struct msghdr
*msg
, size_t size
)
571 struct sock
*sk
= sock
->sk
;
573 if (unlikely(inet_send_prepare(sk
)))
576 return INDIRECT_CALL_2(sk
->sk_prot
->sendmsg
, tcp_sendmsg
, udpv6_sendmsg
,
580 INDIRECT_CALLABLE_DECLARE(int udpv6_recvmsg(struct sock
*, struct msghdr
*,
581 size_t, int, int, int *));
582 int inet6_recvmsg(struct socket
*sock
, struct msghdr
*msg
, size_t size
,
585 struct sock
*sk
= sock
->sk
;
589 if (likely(!(flags
& MSG_ERRQUEUE
)))
590 sock_rps_record_flow(sk
);
592 err
= INDIRECT_CALL_2(sk
->sk_prot
->recvmsg
, tcp_recvmsg
, udpv6_recvmsg
,
593 sk
, msg
, size
, flags
& MSG_DONTWAIT
,
594 flags
& ~MSG_DONTWAIT
, &addr_len
);
596 msg
->msg_namelen
= addr_len
;
600 const struct proto_ops inet6_stream_ops
= {
602 .owner
= THIS_MODULE
,
603 .release
= inet6_release
,
605 .connect
= inet_stream_connect
, /* ok */
606 .socketpair
= sock_no_socketpair
, /* a do nothing */
607 .accept
= inet_accept
, /* ok */
608 .getname
= inet6_getname
,
609 .poll
= tcp_poll
, /* ok */
610 .ioctl
= inet6_ioctl
, /* must change */
611 .gettstamp
= sock_gettstamp
,
612 .listen
= inet_listen
, /* ok */
613 .shutdown
= inet_shutdown
, /* ok */
614 .setsockopt
= sock_common_setsockopt
, /* ok */
615 .getsockopt
= sock_common_getsockopt
, /* ok */
616 .sendmsg
= inet6_sendmsg
, /* retpoline's sake */
617 .recvmsg
= inet6_recvmsg
, /* retpoline's sake */
621 .sendpage
= inet_sendpage
,
622 .sendmsg_locked
= tcp_sendmsg_locked
,
623 .sendpage_locked
= tcp_sendpage_locked
,
624 .splice_read
= tcp_splice_read
,
625 .read_sock
= tcp_read_sock
,
626 .peek_len
= tcp_peek_len
,
628 .compat_setsockopt
= compat_sock_common_setsockopt
,
629 .compat_getsockopt
= compat_sock_common_getsockopt
,
631 .set_rcvlowat
= tcp_set_rcvlowat
,
634 const struct proto_ops inet6_dgram_ops
= {
636 .owner
= THIS_MODULE
,
637 .release
= inet6_release
,
639 .connect
= inet_dgram_connect
, /* ok */
640 .socketpair
= sock_no_socketpair
, /* a do nothing */
641 .accept
= sock_no_accept
, /* a do nothing */
642 .getname
= inet6_getname
,
643 .poll
= udp_poll
, /* ok */
644 .ioctl
= inet6_ioctl
, /* must change */
645 .gettstamp
= sock_gettstamp
,
646 .listen
= sock_no_listen
, /* ok */
647 .shutdown
= inet_shutdown
, /* ok */
648 .setsockopt
= sock_common_setsockopt
, /* ok */
649 .getsockopt
= sock_common_getsockopt
, /* ok */
650 .sendmsg
= inet6_sendmsg
, /* retpoline's sake */
651 .recvmsg
= inet6_recvmsg
, /* retpoline's sake */
652 .mmap
= sock_no_mmap
,
653 .sendpage
= sock_no_sendpage
,
654 .set_peek_off
= sk_set_peek_off
,
656 .compat_setsockopt
= compat_sock_common_setsockopt
,
657 .compat_getsockopt
= compat_sock_common_getsockopt
,
661 static const struct net_proto_family inet6_family_ops
= {
663 .create
= inet6_create
,
664 .owner
= THIS_MODULE
,
667 int inet6_register_protosw(struct inet_protosw
*p
)
669 struct list_head
*lh
;
670 struct inet_protosw
*answer
;
671 struct list_head
*last_perm
;
672 int protocol
= p
->protocol
;
675 spin_lock_bh(&inetsw6_lock
);
678 if (p
->type
>= SOCK_MAX
)
681 /* If we are trying to override a permanent protocol, bail. */
684 last_perm
= &inetsw6
[p
->type
];
685 list_for_each(lh
, &inetsw6
[p
->type
]) {
686 answer
= list_entry(lh
, struct inet_protosw
, list
);
688 /* Check only the non-wild match. */
689 if (INET_PROTOSW_PERMANENT
& answer
->flags
) {
690 if (protocol
== answer
->protocol
)
700 /* Add the new entry after the last permanent entry if any, so that
701 * the new entry does not override a permanent entry when matched with
702 * a wild-card protocol. But it is allowed to override any existing
703 * non-permanent entry. This means that when we remove this entry, the
704 * system automatically returns to the old behavior.
706 list_add_rcu(&p
->list
, last_perm
);
709 spin_unlock_bh(&inetsw6_lock
);
713 pr_err("Attempt to override permanent protocol %d\n", protocol
);
717 pr_err("Ignoring attempt to register invalid socket type %d\n",
721 EXPORT_SYMBOL(inet6_register_protosw
);
724 inet6_unregister_protosw(struct inet_protosw
*p
)
726 if (INET_PROTOSW_PERMANENT
& p
->flags
) {
727 pr_err("Attempt to unregister permanent protocol %d\n",
730 spin_lock_bh(&inetsw6_lock
);
731 list_del_rcu(&p
->list
);
732 spin_unlock_bh(&inetsw6_lock
);
737 EXPORT_SYMBOL(inet6_unregister_protosw
);
739 int inet6_sk_rebuild_header(struct sock
*sk
)
741 struct ipv6_pinfo
*np
= inet6_sk(sk
);
742 struct dst_entry
*dst
;
744 dst
= __sk_dst_check(sk
, np
->dst_cookie
);
747 struct inet_sock
*inet
= inet_sk(sk
);
748 struct in6_addr
*final_p
, final
;
751 memset(&fl6
, 0, sizeof(fl6
));
752 fl6
.flowi6_proto
= sk
->sk_protocol
;
753 fl6
.daddr
= sk
->sk_v6_daddr
;
754 fl6
.saddr
= np
->saddr
;
755 fl6
.flowlabel
= np
->flow_label
;
756 fl6
.flowi6_oif
= sk
->sk_bound_dev_if
;
757 fl6
.flowi6_mark
= sk
->sk_mark
;
758 fl6
.fl6_dport
= inet
->inet_dport
;
759 fl6
.fl6_sport
= inet
->inet_sport
;
760 fl6
.flowi6_uid
= sk
->sk_uid
;
761 security_sk_classify_flow(sk
, flowi6_to_flowi(&fl6
));
764 final_p
= fl6_update_dst(&fl6
, rcu_dereference(np
->opt
),
768 dst
= ip6_dst_lookup_flow(sock_net(sk
), sk
, &fl6
, final_p
);
770 sk
->sk_route_caps
= 0;
771 sk
->sk_err_soft
= -PTR_ERR(dst
);
775 ip6_dst_store(sk
, dst
, NULL
, NULL
);
780 EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header
);
782 bool ipv6_opt_accepted(const struct sock
*sk
, const struct sk_buff
*skb
,
783 const struct inet6_skb_parm
*opt
)
785 const struct ipv6_pinfo
*np
= inet6_sk(sk
);
788 if (((opt
->flags
& IP6SKB_HOPBYHOP
) &&
789 (np
->rxopt
.bits
.hopopts
|| np
->rxopt
.bits
.ohopopts
)) ||
790 (ip6_flowinfo((struct ipv6hdr
*) skb_network_header(skb
)) &&
791 np
->rxopt
.bits
.rxflow
) ||
792 (opt
->srcrt
&& (np
->rxopt
.bits
.srcrt
||
793 np
->rxopt
.bits
.osrcrt
)) ||
794 ((opt
->dst1
|| opt
->dst0
) &&
795 (np
->rxopt
.bits
.dstopts
|| np
->rxopt
.bits
.odstopts
)))
800 EXPORT_SYMBOL_GPL(ipv6_opt_accepted
);
802 static struct packet_type ipv6_packet_type __read_mostly
= {
803 .type
= cpu_to_be16(ETH_P_IPV6
),
805 .list_func
= ipv6_list_rcv
,
808 static int __init
ipv6_packet_init(void)
810 dev_add_pack(&ipv6_packet_type
);
814 static void ipv6_packet_cleanup(void)
816 dev_remove_pack(&ipv6_packet_type
);
819 static int __net_init
ipv6_init_mibs(struct net
*net
)
823 net
->mib
.udp_stats_in6
= alloc_percpu(struct udp_mib
);
824 if (!net
->mib
.udp_stats_in6
)
826 net
->mib
.udplite_stats_in6
= alloc_percpu(struct udp_mib
);
827 if (!net
->mib
.udplite_stats_in6
)
828 goto err_udplite_mib
;
829 net
->mib
.ipv6_statistics
= alloc_percpu(struct ipstats_mib
);
830 if (!net
->mib
.ipv6_statistics
)
833 for_each_possible_cpu(i
) {
834 struct ipstats_mib
*af_inet6_stats
;
835 af_inet6_stats
= per_cpu_ptr(net
->mib
.ipv6_statistics
, i
);
836 u64_stats_init(&af_inet6_stats
->syncp
);
840 net
->mib
.icmpv6_statistics
= alloc_percpu(struct icmpv6_mib
);
841 if (!net
->mib
.icmpv6_statistics
)
843 net
->mib
.icmpv6msg_statistics
= kzalloc(sizeof(struct icmpv6msg_mib
),
845 if (!net
->mib
.icmpv6msg_statistics
)
846 goto err_icmpmsg_mib
;
850 free_percpu(net
->mib
.icmpv6_statistics
);
852 free_percpu(net
->mib
.ipv6_statistics
);
854 free_percpu(net
->mib
.udplite_stats_in6
);
856 free_percpu(net
->mib
.udp_stats_in6
);
860 static void ipv6_cleanup_mibs(struct net
*net
)
862 free_percpu(net
->mib
.udp_stats_in6
);
863 free_percpu(net
->mib
.udplite_stats_in6
);
864 free_percpu(net
->mib
.ipv6_statistics
);
865 free_percpu(net
->mib
.icmpv6_statistics
);
866 kfree(net
->mib
.icmpv6msg_statistics
);
869 static int __net_init
inet6_net_init(struct net
*net
)
873 net
->ipv6
.sysctl
.bindv6only
= 0;
874 net
->ipv6
.sysctl
.icmpv6_time
= 1*HZ
;
875 net
->ipv6
.sysctl
.icmpv6_echo_ignore_all
= 0;
876 net
->ipv6
.sysctl
.icmpv6_echo_ignore_multicast
= 0;
877 net
->ipv6
.sysctl
.icmpv6_echo_ignore_anycast
= 0;
879 /* By default, rate limit error messages.
880 * Except for pmtu discovery, it would break it.
881 * proc_do_large_bitmap needs pointer to the bitmap.
883 bitmap_set(net
->ipv6
.sysctl
.icmpv6_ratemask
, 0, ICMPV6_ERRMSG_MAX
+ 1);
884 bitmap_clear(net
->ipv6
.sysctl
.icmpv6_ratemask
, ICMPV6_PKT_TOOBIG
, 1);
885 net
->ipv6
.sysctl
.icmpv6_ratemask_ptr
= net
->ipv6
.sysctl
.icmpv6_ratemask
;
887 net
->ipv6
.sysctl
.flowlabel_consistency
= 1;
888 net
->ipv6
.sysctl
.auto_flowlabels
= IP6_DEFAULT_AUTO_FLOW_LABELS
;
889 net
->ipv6
.sysctl
.idgen_retries
= 3;
890 net
->ipv6
.sysctl
.idgen_delay
= 1 * HZ
;
891 net
->ipv6
.sysctl
.flowlabel_state_ranges
= 0;
892 net
->ipv6
.sysctl
.max_dst_opts_cnt
= IP6_DEFAULT_MAX_DST_OPTS_CNT
;
893 net
->ipv6
.sysctl
.max_hbh_opts_cnt
= IP6_DEFAULT_MAX_HBH_OPTS_CNT
;
894 net
->ipv6
.sysctl
.max_dst_opts_len
= IP6_DEFAULT_MAX_DST_OPTS_LEN
;
895 net
->ipv6
.sysctl
.max_hbh_opts_len
= IP6_DEFAULT_MAX_HBH_OPTS_LEN
;
896 atomic_set(&net
->ipv6
.fib6_sernum
, 1);
898 err
= ipv6_init_mibs(net
);
901 #ifdef CONFIG_PROC_FS
902 err
= udp6_proc_init(net
);
905 err
= tcp6_proc_init(net
);
908 err
= ac6_proc_init(net
);
914 #ifdef CONFIG_PROC_FS
920 ipv6_cleanup_mibs(net
);
925 static void __net_exit
inet6_net_exit(struct net
*net
)
927 #ifdef CONFIG_PROC_FS
932 ipv6_cleanup_mibs(net
);
935 static struct pernet_operations inet6_net_ops
= {
936 .init
= inet6_net_init
,
937 .exit
= inet6_net_exit
,
940 static int ipv6_route_input(struct sk_buff
*skb
)
942 ip6_route_input(skb
);
943 return skb_dst(skb
)->error
;
946 static const struct ipv6_stub ipv6_stub_impl
= {
947 .ipv6_sock_mc_join
= ipv6_sock_mc_join
,
948 .ipv6_sock_mc_drop
= ipv6_sock_mc_drop
,
949 .ipv6_dst_lookup_flow
= ip6_dst_lookup_flow
,
950 .ipv6_route_input
= ipv6_route_input
,
951 .fib6_get_table
= fib6_get_table
,
952 .fib6_table_lookup
= fib6_table_lookup
,
953 .fib6_lookup
= fib6_lookup
,
954 .fib6_select_path
= fib6_select_path
,
955 .ip6_mtu_from_fib6
= ip6_mtu_from_fib6
,
956 .fib6_nh_init
= fib6_nh_init
,
957 .fib6_nh_release
= fib6_nh_release
,
958 .fib6_update_sernum
= fib6_update_sernum_stub
,
959 .fib6_rt_update
= fib6_rt_update
,
960 .ip6_del_rt
= ip6_del_rt
,
961 .udpv6_encap_enable
= udpv6_encap_enable
,
962 .ndisc_send_na
= ndisc_send_na
,
966 static const struct ipv6_bpf_stub ipv6_bpf_stub_impl
= {
967 .inet6_bind
= __inet6_bind
,
968 .udp6_lib_lookup
= __udp6_lib_lookup
,
971 static int __init
inet6_init(void)
976 sock_skb_cb_check_size(sizeof(struct inet6_skb_parm
));
978 /* Register the socket-side information for inet6_create. */
979 for (r
= &inetsw6
[0]; r
< &inetsw6
[SOCK_MAX
]; ++r
)
982 if (disable_ipv6_mod
) {
983 pr_info("Loaded, but administratively disabled, reboot required to enable\n");
987 err
= proto_register(&tcpv6_prot
, 1);
991 err
= proto_register(&udpv6_prot
, 1);
993 goto out_unregister_tcp_proto
;
995 err
= proto_register(&udplitev6_prot
, 1);
997 goto out_unregister_udp_proto
;
999 err
= proto_register(&rawv6_prot
, 1);
1001 goto out_unregister_udplite_proto
;
1003 err
= proto_register(&pingv6_prot
, 1);
1005 goto out_unregister_raw_proto
;
1007 /* We MUST register RAW sockets before we create the ICMP6,
1008 * IGMP6, or NDISC control sockets.
1012 goto out_unregister_ping_proto
;
1014 /* Register the family here so that the init calls below will
1015 * be able to create sockets. (?? is this dangerous ??)
1017 err
= sock_register(&inet6_family_ops
);
1019 goto out_sock_register_fail
;
1022 * ipngwg API draft makes clear that the correct semantics
1023 * for TCP and UDP is to consider one TCP and UDP instance
1024 * in a host available by both INET and INET6 APIs and
1025 * able to communicate via both network protocols.
1028 err
= register_pernet_subsys(&inet6_net_ops
);
1030 goto register_pernet_fail
;
1031 err
= ip6_mr_init();
1034 err
= icmpv6_init();
1044 err
= ipv6_netfilter_init();
1046 goto netfilter_fail
;
1047 /* Create /proc/foo6 entries. */
1048 #ifdef CONFIG_PROC_FS
1050 if (raw6_proc_init())
1051 goto proc_raw6_fail
;
1052 if (udplite6_proc_init())
1053 goto proc_udplite6_fail
;
1054 if (ipv6_misc_proc_init())
1055 goto proc_misc6_fail
;
1056 if (if6_proc_init())
1059 err
= ip6_route_init();
1061 goto ip6_route_fail
;
1062 err
= ndisc_late_init();
1064 goto ndisc_late_fail
;
1065 err
= ip6_flowlabel_init();
1067 goto ip6_flowlabel_fail
;
1068 err
= ipv6_anycast_init();
1070 goto ipv6_anycast_fail
;
1071 err
= addrconf_init();
1075 /* Init v6 extension headers. */
1076 err
= ipv6_exthdrs_init();
1078 goto ipv6_exthdrs_fail
;
1080 err
= ipv6_frag_init();
1082 goto ipv6_frag_fail
;
1084 /* Init v6 transport protocols. */
1089 err
= udplitev6_init();
1091 goto udplitev6_fail
;
1093 err
= udpv6_offload_init();
1095 goto udpv6_offload_fail
;
1101 err
= ipv6_packet_init();
1103 goto ipv6_packet_fail
;
1105 err
= pingv6_init();
1109 err
= calipso_init();
1117 err
= igmp6_late_init();
1119 goto igmp6_late_err
;
1121 #ifdef CONFIG_SYSCTL
1122 err
= ipv6_sysctl_register();
1127 /* ensure that ipv6 stubs are visible only after ipv6 is ready */
1129 ipv6_stub
= &ipv6_stub_impl
;
1130 ipv6_bpf_stub
= &ipv6_bpf_stub_impl
;
1134 #ifdef CONFIG_SYSCTL
1136 igmp6_late_cleanup();
1145 ipv6_packet_cleanup();
1149 udpv6_offload_exit();
1157 ipv6_exthdrs_exit();
1161 ipv6_anycast_cleanup();
1163 ip6_flowlabel_cleanup();
1165 ndisc_late_cleanup();
1167 ip6_route_cleanup();
1169 #ifdef CONFIG_PROC_FS
1172 ipv6_misc_proc_exit();
1174 udplite6_proc_exit();
1179 ipv6_netfilter_fini();
1189 unregister_pernet_subsys(&inet6_net_ops
);
1190 register_pernet_fail
:
1191 sock_unregister(PF_INET6
);
1192 rtnl_unregister_all(PF_INET6
);
1193 out_sock_register_fail
:
1195 out_unregister_ping_proto
:
1196 proto_unregister(&pingv6_prot
);
1197 out_unregister_raw_proto
:
1198 proto_unregister(&rawv6_prot
);
1199 out_unregister_udplite_proto
:
1200 proto_unregister(&udplitev6_prot
);
1201 out_unregister_udp_proto
:
1202 proto_unregister(&udpv6_prot
);
1203 out_unregister_tcp_proto
:
1204 proto_unregister(&tcpv6_prot
);
1207 module_init(inet6_init
);
1209 MODULE_ALIAS_NETPROTO(PF_INET6
);