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.
22 #include <linux/module.h>
23 #include <linux/capability.h>
24 #include <linux/errno.h>
25 #include <linux/types.h>
26 #include <linux/socket.h>
28 #include <linux/kernel.h>
29 #include <linux/timer.h>
30 #include <linux/string.h>
31 #include <linux/sockios.h>
32 #include <linux/net.h>
33 #include <linux/fcntl.h>
35 #include <linux/interrupt.h>
36 #include <linux/proc_fs.h>
37 #include <linux/stat.h>
38 #include <linux/init.h>
39 #include <linux/slab.h>
41 #include <linux/inet.h>
42 #include <linux/netdevice.h>
43 #include <linux/icmpv6.h>
44 #include <linux/netfilter_ipv6.h>
49 #include <net/udplite.h>
52 #include <net/protocol.h>
53 #include <net/inet_common.h>
54 #include <net/route.h>
55 #include <net/transp_v6.h>
56 #include <net/ip6_route.h>
57 #include <net/addrconf.h>
58 #ifdef CONFIG_IPV6_TUNNEL
59 #include <net/ip6_tunnel.h>
62 #include <asm/uaccess.h>
63 #include <asm/system.h>
64 #include <linux/mroute6.h>
66 MODULE_AUTHOR("Cast of dozens");
67 MODULE_DESCRIPTION("IPv6 protocol stack for Linux");
68 MODULE_LICENSE("GPL");
70 /* The inetsw6 table contains everything that inet6_create needs to
73 static struct list_head inetsw6
[SOCK_MAX
];
74 static DEFINE_SPINLOCK(inetsw6_lock
);
76 struct ipv6_params ipv6_defaults
= {
81 static int disable_ipv6_mod
= 0;
83 module_param_named(disable
, disable_ipv6_mod
, int, 0444);
84 MODULE_PARM_DESC(disable
, "Disable IPv6 module such that it is non-functional");
86 module_param_named(disable_ipv6
, ipv6_defaults
.disable_ipv6
, int, 0444);
87 MODULE_PARM_DESC(disable_ipv6
, "Disable IPv6 on all interfaces");
89 module_param_named(autoconf
, ipv6_defaults
.autoconf
, int, 0444);
90 MODULE_PARM_DESC(autoconf
, "Enable IPv6 address autoconfiguration on all interfaces");
92 static __inline__
struct ipv6_pinfo
*inet6_sk_generic(struct sock
*sk
)
94 const int offset
= sk
->sk_prot
->obj_size
- sizeof(struct ipv6_pinfo
);
96 return (struct ipv6_pinfo
*)(((u8
*)sk
) + offset
);
99 static int inet6_create(struct net
*net
, struct socket
*sock
, int protocol
,
102 struct inet_sock
*inet
;
103 struct ipv6_pinfo
*np
;
105 struct inet_protosw
*answer
;
106 struct proto
*answer_prot
;
107 unsigned char answer_flags
;
108 char answer_no_check
;
109 int try_loading_module
= 0;
112 if (sock
->type
!= SOCK_RAW
&&
113 sock
->type
!= SOCK_DGRAM
&&
115 build_ehash_secret();
117 /* Look for the requested type/protocol pair. */
119 err
= -ESOCKTNOSUPPORT
;
121 list_for_each_entry_rcu(answer
, &inetsw6
[sock
->type
], list
) {
124 /* Check the non-wild match. */
125 if (protocol
== answer
->protocol
) {
126 if (protocol
!= IPPROTO_IP
)
129 /* Check for the two wild cases. */
130 if (IPPROTO_IP
== protocol
) {
131 protocol
= answer
->protocol
;
134 if (IPPROTO_IP
== answer
->protocol
)
137 err
= -EPROTONOSUPPORT
;
141 if (try_loading_module
< 2) {
144 * Be more specific, e.g. net-pf-10-proto-132-type-1
145 * (net-pf-PF_INET6-proto-IPPROTO_SCTP-type-SOCK_STREAM)
147 if (++try_loading_module
== 1)
148 request_module("net-pf-%d-proto-%d-type-%d",
149 PF_INET6
, protocol
, sock
->type
);
151 * Fall back to generic, e.g. net-pf-10-proto-132
152 * (net-pf-PF_INET6-proto-IPPROTO_SCTP)
155 request_module("net-pf-%d-proto-%d",
157 goto lookup_protocol
;
163 if (sock
->type
== SOCK_RAW
&& !kern
&& !capable(CAP_NET_RAW
))
166 sock
->ops
= answer
->ops
;
167 answer_prot
= answer
->prot
;
168 answer_no_check
= answer
->no_check
;
169 answer_flags
= answer
->flags
;
172 WARN_ON(answer_prot
->slab
== NULL
);
175 sk
= sk_alloc(net
, PF_INET6
, GFP_KERNEL
, answer_prot
);
179 sock_init_data(sock
, sk
);
182 sk
->sk_no_check
= answer_no_check
;
183 if (INET_PROTOSW_REUSE
& answer_flags
)
187 inet
->is_icsk
= (INET_PROTOSW_ICSK
& answer_flags
) != 0;
189 if (SOCK_RAW
== sock
->type
) {
190 inet
->inet_num
= protocol
;
191 if (IPPROTO_RAW
== protocol
)
195 sk
->sk_destruct
= inet_sock_destruct
;
196 sk
->sk_family
= PF_INET6
;
197 sk
->sk_protocol
= protocol
;
199 sk
->sk_backlog_rcv
= answer
->prot
->backlog_rcv
;
201 inet_sk(sk
)->pinet6
= np
= inet6_sk_generic(sk
);
203 np
->mcast_hops
= IPV6_DEFAULT_MCASTHOPS
;
205 np
->pmtudisc
= IPV6_PMTUDISC_WANT
;
206 np
->ipv6only
= net
->ipv6
.sysctl
.bindv6only
;
208 /* Init the ipv4 part of the socket since we can have sockets
209 * using v6 API for ipv4.
216 inet
->mc_list
= NULL
;
218 if (ipv4_config
.no_pmtu_disc
)
219 inet
->pmtudisc
= IP_PMTUDISC_DONT
;
221 inet
->pmtudisc
= IP_PMTUDISC_WANT
;
223 * Increment only the relevant sk_prot->socks debug field, this changes
224 * the previous behaviour of incrementing both the equivalent to
225 * answer->prot->socks (inet6_sock_nr) and inet_sock_nr.
227 * This allows better debug granularity as we'll know exactly how many
228 * UDPv6, TCPv6, etc socks were allocated, not the sum of all IPv6
229 * transport protocol socks. -acme
231 sk_refcnt_debug_inc(sk
);
233 if (inet
->inet_num
) {
234 /* It assumes that any protocol which allows
235 * the user to assign a number at socket
236 * creation time automatically shares.
238 inet
->inet_sport
= htons(inet
->inet_num
);
239 sk
->sk_prot
->hash(sk
);
241 if (sk
->sk_prot
->init
) {
242 err
= sk
->sk_prot
->init(sk
);
244 sk_common_release(sk
);
256 /* bind for INET6 API */
257 int inet6_bind(struct socket
*sock
, struct sockaddr
*uaddr
, int addr_len
)
259 struct sockaddr_in6
*addr
=(struct sockaddr_in6
*)uaddr
;
260 struct sock
*sk
= sock
->sk
;
261 struct inet_sock
*inet
= inet_sk(sk
);
262 struct ipv6_pinfo
*np
= inet6_sk(sk
);
263 struct net
*net
= sock_net(sk
);
269 /* If the socket has its own bind function then use it. */
270 if (sk
->sk_prot
->bind
)
271 return sk
->sk_prot
->bind(sk
, uaddr
, addr_len
);
273 if (addr_len
< SIN6_LEN_RFC2133
)
275 addr_type
= ipv6_addr_type(&addr
->sin6_addr
);
276 if ((addr_type
& IPV6_ADDR_MULTICAST
) && sock
->type
== SOCK_STREAM
)
279 snum
= ntohs(addr
->sin6_port
);
280 if (snum
&& snum
< PROT_SOCK
&& !capable(CAP_NET_BIND_SERVICE
))
285 /* Check these errors (active socket, double bind). */
286 if (sk
->sk_state
!= TCP_CLOSE
|| inet
->inet_num
) {
291 /* Check if the address belongs to the host. */
292 if (addr_type
== IPV6_ADDR_MAPPED
) {
295 /* Binding to v4-mapped address on a v6-only socket
303 /* Reproduce AF_INET checks to make the bindings consitant */
304 v4addr
= addr
->sin6_addr
.s6_addr32
[3];
305 chk_addr_ret
= inet_addr_type(net
, v4addr
);
306 if (!sysctl_ip_nonlocal_bind
&&
307 !(inet
->freebind
|| inet
->transparent
) &&
308 v4addr
!= htonl(INADDR_ANY
) &&
309 chk_addr_ret
!= RTN_LOCAL
&&
310 chk_addr_ret
!= RTN_MULTICAST
&&
311 chk_addr_ret
!= RTN_BROADCAST
) {
312 err
= -EADDRNOTAVAIL
;
316 if (addr_type
!= IPV6_ADDR_ANY
) {
317 struct net_device
*dev
= NULL
;
320 if (addr_type
& IPV6_ADDR_LINKLOCAL
) {
321 if (addr_len
>= sizeof(struct sockaddr_in6
) &&
322 addr
->sin6_scope_id
) {
323 /* Override any existing binding, if another one
324 * is supplied by user.
326 sk
->sk_bound_dev_if
= addr
->sin6_scope_id
;
329 /* Binding to link-local address requires an interface */
330 if (!sk
->sk_bound_dev_if
) {
334 dev
= dev_get_by_index_rcu(net
, sk
->sk_bound_dev_if
);
341 /* ipv4 addr of the socket is invalid. Only the
342 * unspecified and mapped address have a v4 equivalent.
344 v4addr
= LOOPBACK4_IPV6
;
345 if (!(addr_type
& IPV6_ADDR_MULTICAST
)) {
346 if (!inet
->transparent
&&
347 !ipv6_chk_addr(net
, &addr
->sin6_addr
,
349 err
= -EADDRNOTAVAIL
;
357 inet
->inet_rcv_saddr
= v4addr
;
358 inet
->inet_saddr
= v4addr
;
360 ipv6_addr_copy(&np
->rcv_saddr
, &addr
->sin6_addr
);
362 if (!(addr_type
& IPV6_ADDR_MULTICAST
))
363 ipv6_addr_copy(&np
->saddr
, &addr
->sin6_addr
);
365 /* Make sure we are allowed to bind here. */
366 if (sk
->sk_prot
->get_port(sk
, snum
)) {
367 inet_reset_saddr(sk
);
372 if (addr_type
!= IPV6_ADDR_ANY
) {
373 sk
->sk_userlocks
|= SOCK_BINDADDR_LOCK
;
374 if (addr_type
!= IPV6_ADDR_MAPPED
)
378 sk
->sk_userlocks
|= SOCK_BINDPORT_LOCK
;
379 inet
->inet_sport
= htons(inet
->inet_num
);
380 inet
->inet_dport
= 0;
381 inet
->inet_daddr
= 0;
390 EXPORT_SYMBOL(inet6_bind
);
392 int inet6_release(struct socket
*sock
)
394 struct sock
*sk
= sock
->sk
;
400 ipv6_sock_mc_close(sk
);
403 ipv6_sock_ac_close(sk
);
405 return inet_release(sock
);
408 EXPORT_SYMBOL(inet6_release
);
410 void inet6_destroy_sock(struct sock
*sk
)
412 struct ipv6_pinfo
*np
= inet6_sk(sk
);
414 struct ipv6_txoptions
*opt
;
416 /* Release rx options */
418 if ((skb
= xchg(&np
->pktoptions
, NULL
)) != NULL
)
421 if ((skb
= xchg(&np
->rxpmtu
, NULL
)) != NULL
)
424 /* Free flowlabels */
425 fl6_free_socklist(sk
);
427 /* Free tx options */
429 if ((opt
= xchg(&np
->opt
, NULL
)) != NULL
)
430 sock_kfree_s(sk
, opt
, opt
->tot_len
);
433 EXPORT_SYMBOL_GPL(inet6_destroy_sock
);
436 * This does both peername and sockname.
439 int inet6_getname(struct socket
*sock
, struct sockaddr
*uaddr
,
440 int *uaddr_len
, int peer
)
442 struct sockaddr_in6
*sin
=(struct sockaddr_in6
*)uaddr
;
443 struct sock
*sk
= sock
->sk
;
444 struct inet_sock
*inet
= inet_sk(sk
);
445 struct ipv6_pinfo
*np
= inet6_sk(sk
);
447 sin
->sin6_family
= AF_INET6
;
448 sin
->sin6_flowinfo
= 0;
449 sin
->sin6_scope_id
= 0;
451 if (!inet
->inet_dport
)
453 if (((1 << sk
->sk_state
) & (TCPF_CLOSE
| TCPF_SYN_SENT
)) &&
456 sin
->sin6_port
= inet
->inet_dport
;
457 ipv6_addr_copy(&sin
->sin6_addr
, &np
->daddr
);
459 sin
->sin6_flowinfo
= np
->flow_label
;
461 if (ipv6_addr_any(&np
->rcv_saddr
))
462 ipv6_addr_copy(&sin
->sin6_addr
, &np
->saddr
);
464 ipv6_addr_copy(&sin
->sin6_addr
, &np
->rcv_saddr
);
466 sin
->sin6_port
= inet
->inet_sport
;
468 if (ipv6_addr_type(&sin
->sin6_addr
) & IPV6_ADDR_LINKLOCAL
)
469 sin
->sin6_scope_id
= sk
->sk_bound_dev_if
;
470 *uaddr_len
= sizeof(*sin
);
474 EXPORT_SYMBOL(inet6_getname
);
476 int inet6_ioctl(struct socket
*sock
, unsigned int cmd
, unsigned long arg
)
478 struct sock
*sk
= sock
->sk
;
479 struct net
*net
= sock_net(sk
);
484 return sock_get_timestamp(sk
, (struct timeval __user
*)arg
);
487 return sock_get_timestampns(sk
, (struct timespec __user
*)arg
);
492 return ipv6_route_ioctl(net
, cmd
, (void __user
*)arg
);
495 return addrconf_add_ifaddr(net
, (void __user
*) arg
);
497 return addrconf_del_ifaddr(net
, (void __user
*) arg
);
499 return addrconf_set_dstaddr(net
, (void __user
*) arg
);
501 if (!sk
->sk_prot
->ioctl
)
503 return sk
->sk_prot
->ioctl(sk
, cmd
, arg
);
509 EXPORT_SYMBOL(inet6_ioctl
);
511 const struct proto_ops inet6_stream_ops
= {
513 .owner
= THIS_MODULE
,
514 .release
= inet6_release
,
516 .connect
= inet_stream_connect
, /* ok */
517 .socketpair
= sock_no_socketpair
, /* a do nothing */
518 .accept
= inet_accept
, /* ok */
519 .getname
= inet6_getname
,
520 .poll
= tcp_poll
, /* ok */
521 .ioctl
= inet6_ioctl
, /* must change */
522 .listen
= inet_listen
, /* ok */
523 .shutdown
= inet_shutdown
, /* ok */
524 .setsockopt
= sock_common_setsockopt
, /* ok */
525 .getsockopt
= sock_common_getsockopt
, /* ok */
526 .sendmsg
= inet_sendmsg
, /* ok */
527 .recvmsg
= inet_recvmsg
, /* ok */
528 .mmap
= sock_no_mmap
,
529 .sendpage
= inet_sendpage
,
530 .splice_read
= tcp_splice_read
,
532 .compat_setsockopt
= compat_sock_common_setsockopt
,
533 .compat_getsockopt
= compat_sock_common_getsockopt
,
537 const struct proto_ops inet6_dgram_ops
= {
539 .owner
= THIS_MODULE
,
540 .release
= inet6_release
,
542 .connect
= inet_dgram_connect
, /* ok */
543 .socketpair
= sock_no_socketpair
, /* a do nothing */
544 .accept
= sock_no_accept
, /* a do nothing */
545 .getname
= inet6_getname
,
546 .poll
= udp_poll
, /* ok */
547 .ioctl
= inet6_ioctl
, /* must change */
548 .listen
= sock_no_listen
, /* ok */
549 .shutdown
= inet_shutdown
, /* ok */
550 .setsockopt
= sock_common_setsockopt
, /* ok */
551 .getsockopt
= sock_common_getsockopt
, /* ok */
552 .sendmsg
= inet_sendmsg
, /* ok */
553 .recvmsg
= inet_recvmsg
, /* ok */
554 .mmap
= sock_no_mmap
,
555 .sendpage
= sock_no_sendpage
,
557 .compat_setsockopt
= compat_sock_common_setsockopt
,
558 .compat_getsockopt
= compat_sock_common_getsockopt
,
562 static const struct net_proto_family inet6_family_ops
= {
564 .create
= inet6_create
,
565 .owner
= THIS_MODULE
,
568 int inet6_register_protosw(struct inet_protosw
*p
)
570 struct list_head
*lh
;
571 struct inet_protosw
*answer
;
572 struct list_head
*last_perm
;
573 int protocol
= p
->protocol
;
576 spin_lock_bh(&inetsw6_lock
);
579 if (p
->type
>= SOCK_MAX
)
582 /* If we are trying to override a permanent protocol, bail. */
585 last_perm
= &inetsw6
[p
->type
];
586 list_for_each(lh
, &inetsw6
[p
->type
]) {
587 answer
= list_entry(lh
, struct inet_protosw
, list
);
589 /* Check only the non-wild match. */
590 if (INET_PROTOSW_PERMANENT
& answer
->flags
) {
591 if (protocol
== answer
->protocol
)
601 /* Add the new entry after the last permanent entry if any, so that
602 * the new entry does not override a permanent entry when matched with
603 * a wild-card protocol. But it is allowed to override any existing
604 * non-permanent entry. This means that when we remove this entry, the
605 * system automatically returns to the old behavior.
607 list_add_rcu(&p
->list
, last_perm
);
610 spin_unlock_bh(&inetsw6_lock
);
614 printk(KERN_ERR
"Attempt to override permanent protocol %d.\n",
620 "Ignoring attempt to register invalid socket type %d.\n",
625 EXPORT_SYMBOL(inet6_register_protosw
);
628 inet6_unregister_protosw(struct inet_protosw
*p
)
630 if (INET_PROTOSW_PERMANENT
& p
->flags
) {
632 "Attempt to unregister permanent protocol %d.\n",
635 spin_lock_bh(&inetsw6_lock
);
636 list_del_rcu(&p
->list
);
637 spin_unlock_bh(&inetsw6_lock
);
643 EXPORT_SYMBOL(inet6_unregister_protosw
);
645 int inet6_sk_rebuild_header(struct sock
*sk
)
648 struct dst_entry
*dst
;
649 struct ipv6_pinfo
*np
= inet6_sk(sk
);
651 dst
= __sk_dst_check(sk
, np
->dst_cookie
);
654 struct inet_sock
*inet
= inet_sk(sk
);
655 struct in6_addr
*final_p
, final
;
658 memset(&fl
, 0, sizeof(fl
));
659 fl
.proto
= sk
->sk_protocol
;
660 ipv6_addr_copy(&fl
.fl6_dst
, &np
->daddr
);
661 ipv6_addr_copy(&fl
.fl6_src
, &np
->saddr
);
662 fl
.fl6_flowlabel
= np
->flow_label
;
663 fl
.oif
= sk
->sk_bound_dev_if
;
664 fl
.mark
= sk
->sk_mark
;
665 fl
.fl_ip_dport
= inet
->inet_dport
;
666 fl
.fl_ip_sport
= inet
->inet_sport
;
667 security_sk_classify_flow(sk
, &fl
);
669 final_p
= fl6_update_dst(&fl
, np
->opt
, &final
);
671 err
= ip6_dst_lookup(sk
, &dst
, &fl
);
673 sk
->sk_route_caps
= 0;
677 ipv6_addr_copy(&fl
.fl6_dst
, final_p
);
679 if ((err
= xfrm_lookup(sock_net(sk
), &dst
, &fl
, sk
, 0)) < 0) {
680 sk
->sk_err_soft
= -err
;
684 __ip6_dst_store(sk
, dst
, NULL
, NULL
);
690 EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header
);
692 int ipv6_opt_accepted(struct sock
*sk
, struct sk_buff
*skb
)
694 struct ipv6_pinfo
*np
= inet6_sk(sk
);
695 struct inet6_skb_parm
*opt
= IP6CB(skb
);
698 if ((opt
->hop
&& (np
->rxopt
.bits
.hopopts
||
699 np
->rxopt
.bits
.ohopopts
)) ||
700 ((IPV6_FLOWINFO_MASK
&
701 *(__be32
*)skb_network_header(skb
)) &&
702 np
->rxopt
.bits
.rxflow
) ||
703 (opt
->srcrt
&& (np
->rxopt
.bits
.srcrt
||
704 np
->rxopt
.bits
.osrcrt
)) ||
705 ((opt
->dst1
|| opt
->dst0
) &&
706 (np
->rxopt
.bits
.dstopts
|| np
->rxopt
.bits
.odstopts
)))
712 EXPORT_SYMBOL_GPL(ipv6_opt_accepted
);
714 static int ipv6_gso_pull_exthdrs(struct sk_buff
*skb
, int proto
)
716 const struct inet6_protocol
*ops
= NULL
;
719 struct ipv6_opt_hdr
*opth
;
722 if (proto
!= NEXTHDR_HOP
) {
723 ops
= rcu_dereference(inet6_protos
[proto
]);
728 if (!(ops
->flags
& INET6_PROTO_GSO_EXTHDR
))
732 if (unlikely(!pskb_may_pull(skb
, 8)))
735 opth
= (void *)skb
->data
;
736 len
= ipv6_optlen(opth
);
738 if (unlikely(!pskb_may_pull(skb
, len
)))
741 proto
= opth
->nexthdr
;
742 __skb_pull(skb
, len
);
748 static int ipv6_gso_send_check(struct sk_buff
*skb
)
750 struct ipv6hdr
*ipv6h
;
751 const struct inet6_protocol
*ops
;
754 if (unlikely(!pskb_may_pull(skb
, sizeof(*ipv6h
))))
757 ipv6h
= ipv6_hdr(skb
);
758 __skb_pull(skb
, sizeof(*ipv6h
));
759 err
= -EPROTONOSUPPORT
;
762 ops
= rcu_dereference(inet6_protos
[
763 ipv6_gso_pull_exthdrs(skb
, ipv6h
->nexthdr
)]);
765 if (likely(ops
&& ops
->gso_send_check
)) {
766 skb_reset_transport_header(skb
);
767 err
= ops
->gso_send_check(skb
);
775 static struct sk_buff
*ipv6_gso_segment(struct sk_buff
*skb
, int features
)
777 struct sk_buff
*segs
= ERR_PTR(-EINVAL
);
778 struct ipv6hdr
*ipv6h
;
779 const struct inet6_protocol
*ops
;
781 struct frag_hdr
*fptr
;
782 unsigned int unfrag_ip6hlen
;
786 if (!(features
& NETIF_F_V6_CSUM
))
787 features
&= ~NETIF_F_SG
;
789 if (unlikely(skb_shinfo(skb
)->gso_type
&
797 if (unlikely(!pskb_may_pull(skb
, sizeof(*ipv6h
))))
800 ipv6h
= ipv6_hdr(skb
);
801 __skb_pull(skb
, sizeof(*ipv6h
));
802 segs
= ERR_PTR(-EPROTONOSUPPORT
);
804 proto
= ipv6_gso_pull_exthdrs(skb
, ipv6h
->nexthdr
);
806 ops
= rcu_dereference(inet6_protos
[proto
]);
807 if (likely(ops
&& ops
->gso_segment
)) {
808 skb_reset_transport_header(skb
);
809 segs
= ops
->gso_segment(skb
, features
);
813 if (unlikely(IS_ERR(segs
)))
816 for (skb
= segs
; skb
; skb
= skb
->next
) {
817 ipv6h
= ipv6_hdr(skb
);
818 ipv6h
->payload_len
= htons(skb
->len
- skb
->mac_len
-
820 if (proto
== IPPROTO_UDP
) {
821 unfrag_ip6hlen
= ip6_find_1stfragopt(skb
, &prevhdr
);
822 fptr
= (struct frag_hdr
*)(skb_network_header(skb
) +
824 fptr
->frag_off
= htons(offset
);
825 if (skb
->next
!= NULL
)
826 fptr
->frag_off
|= htons(IP6_MF
);
827 offset
+= (ntohs(ipv6h
->payload_len
) -
828 sizeof(struct frag_hdr
));
837 struct napi_gro_cb napi
;
841 #define IPV6_GRO_CB(skb) ((struct ipv6_gro_cb *)(skb)->cb)
843 static struct sk_buff
**ipv6_gro_receive(struct sk_buff
**head
,
846 const struct inet6_protocol
*ops
;
847 struct sk_buff
**pp
= NULL
;
857 off
= skb_gro_offset(skb
);
858 hlen
= off
+ sizeof(*iph
);
859 iph
= skb_gro_header_fast(skb
, off
);
860 if (skb_gro_header_hard(skb
, hlen
)) {
861 iph
= skb_gro_header_slow(skb
, hlen
, off
);
866 skb_gro_pull(skb
, sizeof(*iph
));
867 skb_set_transport_header(skb
, skb_gro_offset(skb
));
869 flush
+= ntohs(iph
->payload_len
) != skb_gro_len(skb
);
872 proto
= iph
->nexthdr
;
873 ops
= rcu_dereference(inet6_protos
[proto
]);
874 if (!ops
|| !ops
->gro_receive
) {
875 __pskb_pull(skb
, skb_gro_offset(skb
));
876 proto
= ipv6_gso_pull_exthdrs(skb
, proto
);
877 skb_gro_pull(skb
, -skb_transport_offset(skb
));
878 skb_reset_transport_header(skb
);
879 __skb_push(skb
, skb_gro_offset(skb
));
881 if (!ops
|| !ops
->gro_receive
)
887 IPV6_GRO_CB(skb
)->proto
= proto
;
890 nlen
= skb_network_header_len(skb
);
892 for (p
= *head
; p
; p
= p
->next
) {
893 struct ipv6hdr
*iph2
;
895 if (!NAPI_GRO_CB(p
)->same_flow
)
900 /* All fields must match except length. */
901 if (nlen
!= skb_network_header_len(p
) ||
902 memcmp(iph
, iph2
, offsetof(struct ipv6hdr
, payload_len
)) ||
903 memcmp(&iph
->nexthdr
, &iph2
->nexthdr
,
904 nlen
- offsetof(struct ipv6hdr
, nexthdr
))) {
905 NAPI_GRO_CB(p
)->same_flow
= 0;
909 NAPI_GRO_CB(p
)->flush
|= flush
;
912 NAPI_GRO_CB(skb
)->flush
|= flush
;
915 skb_postpull_rcsum(skb
, iph
, skb_network_header_len(skb
));
917 pp
= ops
->gro_receive(head
, skb
);
925 NAPI_GRO_CB(skb
)->flush
|= flush
;
930 static int ipv6_gro_complete(struct sk_buff
*skb
)
932 const struct inet6_protocol
*ops
;
933 struct ipv6hdr
*iph
= ipv6_hdr(skb
);
936 iph
->payload_len
= htons(skb
->len
- skb_network_offset(skb
) -
940 ops
= rcu_dereference(inet6_protos
[IPV6_GRO_CB(skb
)->proto
]);
941 if (WARN_ON(!ops
|| !ops
->gro_complete
))
944 err
= ops
->gro_complete(skb
);
952 static struct packet_type ipv6_packet_type __read_mostly
= {
953 .type
= cpu_to_be16(ETH_P_IPV6
),
955 .gso_send_check
= ipv6_gso_send_check
,
956 .gso_segment
= ipv6_gso_segment
,
957 .gro_receive
= ipv6_gro_receive
,
958 .gro_complete
= ipv6_gro_complete
,
961 static int __init
ipv6_packet_init(void)
963 dev_add_pack(&ipv6_packet_type
);
967 static void ipv6_packet_cleanup(void)
969 dev_remove_pack(&ipv6_packet_type
);
972 static int __net_init
ipv6_init_mibs(struct net
*net
)
974 if (snmp_mib_init((void __percpu
**)net
->mib
.udp_stats_in6
,
975 sizeof(struct udp_mib
),
976 __alignof__(struct udp_mib
)) < 0)
978 if (snmp_mib_init((void __percpu
**)net
->mib
.udplite_stats_in6
,
979 sizeof(struct udp_mib
),
980 __alignof__(struct udp_mib
)) < 0)
981 goto err_udplite_mib
;
982 if (snmp_mib_init((void __percpu
**)net
->mib
.ipv6_statistics
,
983 sizeof(struct ipstats_mib
),
984 __alignof__(struct ipstats_mib
)) < 0)
986 if (snmp_mib_init((void __percpu
**)net
->mib
.icmpv6_statistics
,
987 sizeof(struct icmpv6_mib
),
988 __alignof__(struct icmpv6_mib
)) < 0)
990 if (snmp_mib_init((void __percpu
**)net
->mib
.icmpv6msg_statistics
,
991 sizeof(struct icmpv6msg_mib
),
992 __alignof__(struct icmpv6msg_mib
)) < 0)
993 goto err_icmpmsg_mib
;
997 snmp_mib_free((void __percpu
**)net
->mib
.icmpv6_statistics
);
999 snmp_mib_free((void __percpu
**)net
->mib
.ipv6_statistics
);
1001 snmp_mib_free((void __percpu
**)net
->mib
.udplite_stats_in6
);
1003 snmp_mib_free((void __percpu
**)net
->mib
.udp_stats_in6
);
1007 static void ipv6_cleanup_mibs(struct net
*net
)
1009 snmp_mib_free((void __percpu
**)net
->mib
.udp_stats_in6
);
1010 snmp_mib_free((void __percpu
**)net
->mib
.udplite_stats_in6
);
1011 snmp_mib_free((void __percpu
**)net
->mib
.ipv6_statistics
);
1012 snmp_mib_free((void __percpu
**)net
->mib
.icmpv6_statistics
);
1013 snmp_mib_free((void __percpu
**)net
->mib
.icmpv6msg_statistics
);
1016 static int __net_init
inet6_net_init(struct net
*net
)
1020 net
->ipv6
.sysctl
.bindv6only
= 0;
1021 net
->ipv6
.sysctl
.icmpv6_time
= 1*HZ
;
1023 err
= ipv6_init_mibs(net
);
1026 #ifdef CONFIG_PROC_FS
1027 err
= udp6_proc_init(net
);
1030 err
= tcp6_proc_init(net
);
1032 goto proc_tcp6_fail
;
1033 err
= ac6_proc_init(net
);
1039 #ifdef CONFIG_PROC_FS
1041 tcp6_proc_exit(net
);
1043 udp6_proc_exit(net
);
1045 ipv6_cleanup_mibs(net
);
1050 static void __net_exit
inet6_net_exit(struct net
*net
)
1052 #ifdef CONFIG_PROC_FS
1053 udp6_proc_exit(net
);
1054 tcp6_proc_exit(net
);
1057 ipv6_cleanup_mibs(net
);
1060 static struct pernet_operations inet6_net_ops
= {
1061 .init
= inet6_net_init
,
1062 .exit
= inet6_net_exit
,
1065 static int __init
inet6_init(void)
1067 struct sk_buff
*dummy_skb
;
1068 struct list_head
*r
;
1071 BUILD_BUG_ON(sizeof(struct inet6_skb_parm
) > sizeof(dummy_skb
->cb
));
1073 /* Register the socket-side information for inet6_create. */
1074 for(r
= &inetsw6
[0]; r
< &inetsw6
[SOCK_MAX
]; ++r
)
1077 if (disable_ipv6_mod
) {
1079 "IPv6: Loaded, but administratively disabled, "
1080 "reboot required to enable\n");
1084 err
= proto_register(&tcpv6_prot
, 1);
1088 err
= proto_register(&udpv6_prot
, 1);
1090 goto out_unregister_tcp_proto
;
1092 err
= proto_register(&udplitev6_prot
, 1);
1094 goto out_unregister_udp_proto
;
1096 err
= proto_register(&rawv6_prot
, 1);
1098 goto out_unregister_udplite_proto
;
1101 /* We MUST register RAW sockets before we create the ICMP6,
1102 * IGMP6, or NDISC control sockets.
1106 goto out_unregister_raw_proto
;
1108 /* Register the family here so that the init calls below will
1109 * be able to create sockets. (?? is this dangerous ??)
1111 err
= sock_register(&inet6_family_ops
);
1113 goto out_sock_register_fail
;
1115 #ifdef CONFIG_SYSCTL
1116 err
= ipv6_static_sysctl_register();
1118 goto static_sysctl_fail
;
1121 * ipngwg API draft makes clear that the correct semantics
1122 * for TCP and UDP is to consider one TCP and UDP instance
1123 * in a host availiable by both INET and INET6 APIs and
1124 * able to communicate via both network protocols.
1127 err
= register_pernet_subsys(&inet6_net_ops
);
1129 goto register_pernet_fail
;
1130 err
= icmpv6_init();
1133 err
= ip6_mr_init();
1142 err
= ipv6_netfilter_init();
1144 goto netfilter_fail
;
1145 /* Create /proc/foo6 entries. */
1146 #ifdef CONFIG_PROC_FS
1148 if (raw6_proc_init())
1149 goto proc_raw6_fail
;
1150 if (udplite6_proc_init())
1151 goto proc_udplite6_fail
;
1152 if (ipv6_misc_proc_init())
1153 goto proc_misc6_fail
;
1154 if (if6_proc_init())
1157 err
= ip6_route_init();
1159 goto ip6_route_fail
;
1160 err
= ip6_flowlabel_init();
1162 goto ip6_flowlabel_fail
;
1163 err
= addrconf_init();
1167 /* Init v6 extension headers. */
1168 err
= ipv6_exthdrs_init();
1170 goto ipv6_exthdrs_fail
;
1172 err
= ipv6_frag_init();
1174 goto ipv6_frag_fail
;
1176 /* Init v6 transport protocols. */
1181 err
= udplitev6_init();
1183 goto udplitev6_fail
;
1189 err
= ipv6_packet_init();
1191 goto ipv6_packet_fail
;
1193 #ifdef CONFIG_SYSCTL
1194 err
= ipv6_sysctl_register();
1201 #ifdef CONFIG_SYSCTL
1203 ipv6_packet_cleanup();
1214 ipv6_exthdrs_exit();
1218 ip6_flowlabel_cleanup();
1220 ip6_route_cleanup();
1222 #ifdef CONFIG_PROC_FS
1225 ipv6_misc_proc_exit();
1227 udplite6_proc_exit();
1232 ipv6_netfilter_fini();
1242 unregister_pernet_subsys(&inet6_net_ops
);
1243 register_pernet_fail
:
1244 #ifdef CONFIG_SYSCTL
1245 ipv6_static_sysctl_unregister();
1248 sock_unregister(PF_INET6
);
1249 rtnl_unregister_all(PF_INET6
);
1250 out_sock_register_fail
:
1252 out_unregister_raw_proto
:
1253 proto_unregister(&rawv6_prot
);
1254 out_unregister_udplite_proto
:
1255 proto_unregister(&udplitev6_prot
);
1256 out_unregister_udp_proto
:
1257 proto_unregister(&udpv6_prot
);
1258 out_unregister_tcp_proto
:
1259 proto_unregister(&tcpv6_prot
);
1262 module_init(inet6_init
);
1264 static void __exit
inet6_exit(void)
1266 if (disable_ipv6_mod
)
1269 /* First of all disallow new sockets creation. */
1270 sock_unregister(PF_INET6
);
1271 /* Disallow any further netlink messages */
1272 rtnl_unregister_all(PF_INET6
);
1274 #ifdef CONFIG_SYSCTL
1275 ipv6_sysctl_unregister();
1281 /* Cleanup code parts. */
1282 ipv6_packet_cleanup();
1284 ipv6_exthdrs_exit();
1286 ip6_flowlabel_cleanup();
1287 ip6_route_cleanup();
1288 #ifdef CONFIG_PROC_FS
1290 /* Cleanup code parts. */
1292 ipv6_misc_proc_exit();
1293 udplite6_proc_exit();
1296 ipv6_netfilter_fini();
1303 unregister_pernet_subsys(&inet6_net_ops
);
1304 #ifdef CONFIG_SYSCTL
1305 ipv6_static_sysctl_unregister();
1307 proto_unregister(&rawv6_prot
);
1308 proto_unregister(&udplitev6_prot
);
1309 proto_unregister(&udpv6_prot
);
1310 proto_unregister(&tcpv6_prot
);
1312 rcu_barrier(); /* Wait for completion of call_rcu()'s */
1314 module_exit(inet6_exit
);
1316 MODULE_ALIAS_NETPROTO(PF_INET6
);