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>
40 #include <linux/inet.h>
41 #include <linux/netdevice.h>
42 #include <linux/icmpv6.h>
43 #include <linux/netfilter_ipv6.h>
48 #include <net/udplite.h>
51 #include <net/protocol.h>
52 #include <net/inet_common.h>
53 #include <net/route.h>
54 #include <net/transp_v6.h>
55 #include <net/ip6_route.h>
56 #include <net/addrconf.h>
57 #ifdef CONFIG_IPV6_TUNNEL
58 #include <net/ip6_tunnel.h>
61 #include <asm/uaccess.h>
62 #include <asm/system.h>
63 #include <linux/mroute6.h>
65 MODULE_AUTHOR("Cast of dozens");
66 MODULE_DESCRIPTION("IPv6 protocol stack for Linux");
67 MODULE_LICENSE("GPL");
69 /* The inetsw6 table contains everything that inet6_create needs to
72 static struct list_head inetsw6[SOCK_MAX];
73 static DEFINE_SPINLOCK(inetsw6_lock);
75 struct ipv6_params ipv6_defaults = {
80 static int disable_ipv6_mod = 0;
82 module_param_named(disable, disable_ipv6_mod, int, 0444);
83 MODULE_PARM_DESC(disable, "Disable IPv6 module such that it is non-functional");
85 module_param_named(disable_ipv6, ipv6_defaults.disable_ipv6, int, 0444);
86 MODULE_PARM_DESC(disable_ipv6, "Disable IPv6 on all interfaces");
88 module_param_named(autoconf, ipv6_defaults.autoconf, int, 0444);
89 MODULE_PARM_DESC(autoconf, "Enable IPv6 address autoconfiguration on all interfaces");
91 static __inline__ struct ipv6_pinfo *inet6_sk_generic(struct sock *sk)
93 const int offset = sk->sk_prot->obj_size - sizeof(struct ipv6_pinfo);
95 return (struct ipv6_pinfo *)(((u8 *)sk) + offset);
98 static int inet6_create(struct net *net, struct socket *sock, int protocol)
100 struct inet_sock *inet;
101 struct ipv6_pinfo *np;
103 struct inet_protosw *answer;
104 struct proto *answer_prot;
105 unsigned char answer_flags;
106 char answer_no_check;
107 int try_loading_module = 0;
110 if (sock->type != SOCK_RAW &&
111 sock->type != SOCK_DGRAM &&
113 build_ehash_secret();
115 /* Look for the requested type/protocol pair. */
117 err = -ESOCKTNOSUPPORT;
119 list_for_each_entry_rcu(answer, &inetsw6[sock->type], list) {
122 /* Check the non-wild match. */
123 if (protocol == answer->protocol) {
124 if (protocol != IPPROTO_IP)
127 /* Check for the two wild cases. */
128 if (IPPROTO_IP == protocol) {
129 protocol = answer->protocol;
132 if (IPPROTO_IP == answer->protocol)
135 err = -EPROTONOSUPPORT;
139 if (try_loading_module < 2) {
142 * Be more specific, e.g. net-pf-10-proto-132-type-1
143 * (net-pf-PF_INET6-proto-IPPROTO_SCTP-type-SOCK_STREAM)
145 if (++try_loading_module == 1)
146 request_module("net-pf-%d-proto-%d-type-%d",
147 PF_INET6, protocol, sock->type);
149 * Fall back to generic, e.g. net-pf-10-proto-132
150 * (net-pf-PF_INET6-proto-IPPROTO_SCTP)
153 request_module("net-pf-%d-proto-%d",
155 goto lookup_protocol;
161 if (answer->capability > 0 && !capable(answer->capability))
164 sock->ops = answer->ops;
165 answer_prot = answer->prot;
166 answer_no_check = answer->no_check;
167 answer_flags = answer->flags;
170 WARN_ON(answer_prot->slab == NULL);
173 sk = sk_alloc(net, PF_INET6, GFP_KERNEL, answer_prot);
177 sock_init_data(sock, sk);
180 sk->sk_no_check = answer_no_check;
181 if (INET_PROTOSW_REUSE & answer_flags)
185 inet->is_icsk = (INET_PROTOSW_ICSK & answer_flags) != 0;
187 if (SOCK_RAW == sock->type) {
188 inet->num = protocol;
189 if (IPPROTO_RAW == protocol)
193 sk->sk_destruct = inet_sock_destruct;
194 sk->sk_family = PF_INET6;
195 sk->sk_protocol = protocol;
197 sk->sk_backlog_rcv = answer->prot->backlog_rcv;
199 inet_sk(sk)->pinet6 = np = inet6_sk_generic(sk);
203 np->pmtudisc = IPV6_PMTUDISC_WANT;
204 np->ipv6only = net->ipv6.sysctl.bindv6only;
206 /* Init the ipv4 part of the socket since we can have sockets
207 * using v6 API for ipv4.
214 inet->mc_list = NULL;
216 if (ipv4_config.no_pmtu_disc)
217 inet->pmtudisc = IP_PMTUDISC_DONT;
219 inet->pmtudisc = IP_PMTUDISC_WANT;
221 * Increment only the relevant sk_prot->socks debug field, this changes
222 * the previous behaviour of incrementing both the equivalent to
223 * answer->prot->socks (inet6_sock_nr) and inet_sock_nr.
225 * This allows better debug granularity as we'll know exactly how many
226 * UDPv6, TCPv6, etc socks were allocated, not the sum of all IPv6
227 * transport protocol socks. -acme
229 sk_refcnt_debug_inc(sk);
232 /* It assumes that any protocol which allows
233 * the user to assign a number at socket
234 * creation time automatically shares.
236 inet->sport = htons(inet->num);
237 sk->sk_prot->hash(sk);
239 if (sk->sk_prot->init) {
240 err = sk->sk_prot->init(sk);
242 sk_common_release(sk);
254 /* bind for INET6 API */
255 int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
257 struct sockaddr_in6 *addr=(struct sockaddr_in6 *)uaddr;
258 struct sock *sk = sock->sk;
259 struct inet_sock *inet = inet_sk(sk);
260 struct ipv6_pinfo *np = inet6_sk(sk);
261 struct net *net = sock_net(sk);
267 /* If the socket has its own bind function then use it. */
268 if (sk->sk_prot->bind)
269 return sk->sk_prot->bind(sk, uaddr, addr_len);
271 if (addr_len < SIN6_LEN_RFC2133)
273 addr_type = ipv6_addr_type(&addr->sin6_addr);
274 if ((addr_type & IPV6_ADDR_MULTICAST) && sock->type == SOCK_STREAM)
277 snum = ntohs(addr->sin6_port);
278 if (snum && snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
283 /* Check these errors (active socket, double bind). */
284 if (sk->sk_state != TCP_CLOSE || inet->num) {
289 /* Check if the address belongs to the host. */
290 if (addr_type == IPV6_ADDR_MAPPED) {
293 /* Binding to v4-mapped address on a v6-only socket
301 /* Reproduce AF_INET checks to make the bindings consitant */
302 v4addr = addr->sin6_addr.s6_addr32[3];
303 chk_addr_ret = inet_addr_type(net, v4addr);
304 if (!sysctl_ip_nonlocal_bind &&
305 !(inet->freebind || inet->transparent) &&
306 v4addr != htonl(INADDR_ANY) &&
307 chk_addr_ret != RTN_LOCAL &&
308 chk_addr_ret != RTN_MULTICAST &&
309 chk_addr_ret != RTN_BROADCAST) {
310 err = -EADDRNOTAVAIL;
314 if (addr_type != IPV6_ADDR_ANY) {
315 struct net_device *dev = NULL;
317 if (addr_type & IPV6_ADDR_LINKLOCAL) {
318 if (addr_len >= sizeof(struct sockaddr_in6) &&
319 addr->sin6_scope_id) {
320 /* Override any existing binding, if another one
321 * is supplied by user.
323 sk->sk_bound_dev_if = addr->sin6_scope_id;
326 /* Binding to link-local address requires an interface */
327 if (!sk->sk_bound_dev_if) {
331 dev = dev_get_by_index(net, sk->sk_bound_dev_if);
338 /* ipv4 addr of the socket is invalid. Only the
339 * unspecified and mapped address have a v4 equivalent.
341 v4addr = LOOPBACK4_IPV6;
342 if (!(addr_type & IPV6_ADDR_MULTICAST)) {
343 if (!ipv6_chk_addr(net, &addr->sin6_addr,
347 err = -EADDRNOTAVAIL;
356 inet->rcv_saddr = v4addr;
357 inet->saddr = v4addr;
359 ipv6_addr_copy(&np->rcv_saddr, &addr->sin6_addr);
361 if (!(addr_type & IPV6_ADDR_MULTICAST))
362 ipv6_addr_copy(&np->saddr, &addr->sin6_addr);
364 /* Make sure we are allowed to bind here. */
365 if (sk->sk_prot->get_port(sk, snum)) {
366 inet_reset_saddr(sk);
371 if (addr_type != IPV6_ADDR_ANY) {
372 sk->sk_userlocks |= SOCK_BINDADDR_LOCK;
373 if (addr_type != IPV6_ADDR_MAPPED)
377 sk->sk_userlocks |= SOCK_BINDPORT_LOCK;
378 inet->sport = htons(inet->num);
386 EXPORT_SYMBOL(inet6_bind);
388 int inet6_release(struct socket *sock)
390 struct sock *sk = sock->sk;
396 ipv6_sock_mc_close(sk);
399 ipv6_sock_ac_close(sk);
401 return inet_release(sock);
404 EXPORT_SYMBOL(inet6_release);
406 void inet6_destroy_sock(struct sock *sk)
408 struct ipv6_pinfo *np = inet6_sk(sk);
410 struct ipv6_txoptions *opt;
412 /* Release rx options */
414 if ((skb = xchg(&np->pktoptions, NULL)) != NULL)
417 /* Free flowlabels */
418 fl6_free_socklist(sk);
420 /* Free tx options */
422 if ((opt = xchg(&np->opt, NULL)) != NULL)
423 sock_kfree_s(sk, opt, opt->tot_len);
426 EXPORT_SYMBOL_GPL(inet6_destroy_sock);
429 * This does both peername and sockname.
432 int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
433 int *uaddr_len, int peer)
435 struct sockaddr_in6 *sin=(struct sockaddr_in6 *)uaddr;
436 struct sock *sk = sock->sk;
437 struct inet_sock *inet = inet_sk(sk);
438 struct ipv6_pinfo *np = inet6_sk(sk);
440 sin->sin6_family = AF_INET6;
441 sin->sin6_flowinfo = 0;
442 sin->sin6_scope_id = 0;
446 if (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) &&
449 sin->sin6_port = inet->dport;
450 ipv6_addr_copy(&sin->sin6_addr, &np->daddr);
452 sin->sin6_flowinfo = np->flow_label;
454 if (ipv6_addr_any(&np->rcv_saddr))
455 ipv6_addr_copy(&sin->sin6_addr, &np->saddr);
457 ipv6_addr_copy(&sin->sin6_addr, &np->rcv_saddr);
459 sin->sin6_port = inet->sport;
461 if (ipv6_addr_type(&sin->sin6_addr) & IPV6_ADDR_LINKLOCAL)
462 sin->sin6_scope_id = sk->sk_bound_dev_if;
463 *uaddr_len = sizeof(*sin);
467 EXPORT_SYMBOL(inet6_getname);
469 int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
471 struct sock *sk = sock->sk;
472 struct net *net = sock_net(sk);
477 return sock_get_timestamp(sk, (struct timeval __user *)arg);
480 return sock_get_timestampns(sk, (struct timespec __user *)arg);
485 return(ipv6_route_ioctl(net, cmd, (void __user *)arg));
488 return addrconf_add_ifaddr(net, (void __user *) arg);
490 return addrconf_del_ifaddr(net, (void __user *) arg);
492 return addrconf_set_dstaddr(net, (void __user *) arg);
494 if (!sk->sk_prot->ioctl)
496 return sk->sk_prot->ioctl(sk, cmd, arg);
502 EXPORT_SYMBOL(inet6_ioctl);
504 const struct proto_ops inet6_stream_ops = {
506 .owner = THIS_MODULE,
507 .release = inet6_release,
509 .connect = inet_stream_connect, /* ok */
510 .socketpair = sock_no_socketpair, /* a do nothing */
511 .accept = inet_accept, /* ok */
512 .getname = inet6_getname,
513 .poll = tcp_poll, /* ok */
514 .ioctl = inet6_ioctl, /* must change */
515 .listen = inet_listen, /* ok */
516 .shutdown = inet_shutdown, /* ok */
517 .setsockopt = sock_common_setsockopt, /* ok */
518 .getsockopt = sock_common_getsockopt, /* ok */
519 .sendmsg = tcp_sendmsg, /* ok */
520 .recvmsg = sock_common_recvmsg, /* ok */
521 .mmap = sock_no_mmap,
522 .sendpage = tcp_sendpage,
523 .splice_read = tcp_splice_read,
525 .compat_setsockopt = compat_sock_common_setsockopt,
526 .compat_getsockopt = compat_sock_common_getsockopt,
530 const struct proto_ops inet6_dgram_ops = {
532 .owner = THIS_MODULE,
533 .release = inet6_release,
535 .connect = inet_dgram_connect, /* ok */
536 .socketpair = sock_no_socketpair, /* a do nothing */
537 .accept = sock_no_accept, /* a do nothing */
538 .getname = inet6_getname,
539 .poll = udp_poll, /* ok */
540 .ioctl = inet6_ioctl, /* must change */
541 .listen = sock_no_listen, /* ok */
542 .shutdown = inet_shutdown, /* ok */
543 .setsockopt = sock_common_setsockopt, /* ok */
544 .getsockopt = sock_common_getsockopt, /* ok */
545 .sendmsg = inet_sendmsg, /* ok */
546 .recvmsg = sock_common_recvmsg, /* ok */
547 .mmap = sock_no_mmap,
548 .sendpage = sock_no_sendpage,
550 .compat_setsockopt = compat_sock_common_setsockopt,
551 .compat_getsockopt = compat_sock_common_getsockopt,
555 static const struct net_proto_family inet6_family_ops = {
557 .create = inet6_create,
558 .owner = THIS_MODULE,
561 int inet6_register_protosw(struct inet_protosw *p)
563 struct list_head *lh;
564 struct inet_protosw *answer;
565 struct list_head *last_perm;
566 int protocol = p->protocol;
569 spin_lock_bh(&inetsw6_lock);
572 if (p->type >= SOCK_MAX)
575 /* If we are trying to override a permanent protocol, bail. */
578 last_perm = &inetsw6[p->type];
579 list_for_each(lh, &inetsw6[p->type]) {
580 answer = list_entry(lh, struct inet_protosw, list);
582 /* Check only the non-wild match. */
583 if (INET_PROTOSW_PERMANENT & answer->flags) {
584 if (protocol == answer->protocol)
594 /* Add the new entry after the last permanent entry if any, so that
595 * the new entry does not override a permanent entry when matched with
596 * a wild-card protocol. But it is allowed to override any existing
597 * non-permanent entry. This means that when we remove this entry, the
598 * system automatically returns to the old behavior.
600 list_add_rcu(&p->list, last_perm);
603 spin_unlock_bh(&inetsw6_lock);
607 printk(KERN_ERR "Attempt to override permanent protocol %d.\n",
613 "Ignoring attempt to register invalid socket type %d.\n",
618 EXPORT_SYMBOL(inet6_register_protosw);
621 inet6_unregister_protosw(struct inet_protosw *p)
623 if (INET_PROTOSW_PERMANENT & p->flags) {
625 "Attempt to unregister permanent protocol %d.\n",
628 spin_lock_bh(&inetsw6_lock);
629 list_del_rcu(&p->list);
630 spin_unlock_bh(&inetsw6_lock);
636 EXPORT_SYMBOL(inet6_unregister_protosw);
638 int inet6_sk_rebuild_header(struct sock *sk)
641 struct dst_entry *dst;
642 struct ipv6_pinfo *np = inet6_sk(sk);
644 dst = __sk_dst_check(sk, np->dst_cookie);
647 struct inet_sock *inet = inet_sk(sk);
648 struct in6_addr *final_p = NULL, final;
651 memset(&fl, 0, sizeof(fl));
652 fl.proto = sk->sk_protocol;
653 ipv6_addr_copy(&fl.fl6_dst, &np->daddr);
654 ipv6_addr_copy(&fl.fl6_src, &np->saddr);
655 fl.fl6_flowlabel = np->flow_label;
656 fl.oif = sk->sk_bound_dev_if;
657 fl.mark = sk->sk_mark;
658 fl.fl_ip_dport = inet->dport;
659 fl.fl_ip_sport = inet->sport;
660 security_sk_classify_flow(sk, &fl);
662 if (np->opt && np->opt->srcrt) {
663 struct rt0_hdr *rt0 = (struct rt0_hdr *) np->opt->srcrt;
664 ipv6_addr_copy(&final, &fl.fl6_dst);
665 ipv6_addr_copy(&fl.fl6_dst, rt0->addr);
669 err = ip6_dst_lookup(sk, &dst, &fl);
671 sk->sk_route_caps = 0;
675 ipv6_addr_copy(&fl.fl6_dst, final_p);
677 if ((err = xfrm_lookup(sock_net(sk), &dst, &fl, sk, 0)) < 0) {
678 sk->sk_err_soft = -err;
682 __ip6_dst_store(sk, dst, NULL, NULL);
688 EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header);
690 int ipv6_opt_accepted(struct sock *sk, struct sk_buff *skb)
692 struct ipv6_pinfo *np = inet6_sk(sk);
693 struct inet6_skb_parm *opt = IP6CB(skb);
696 if ((opt->hop && (np->rxopt.bits.hopopts ||
697 np->rxopt.bits.ohopopts)) ||
698 ((IPV6_FLOWINFO_MASK &
699 *(__be32 *)skb_network_header(skb)) &&
700 np->rxopt.bits.rxflow) ||
701 (opt->srcrt && (np->rxopt.bits.srcrt ||
702 np->rxopt.bits.osrcrt)) ||
703 ((opt->dst1 || opt->dst0) &&
704 (np->rxopt.bits.dstopts || np->rxopt.bits.odstopts)))
710 EXPORT_SYMBOL_GPL(ipv6_opt_accepted);
712 static int ipv6_gso_pull_exthdrs(struct sk_buff *skb, int proto)
714 const struct inet6_protocol *ops = NULL;
717 struct ipv6_opt_hdr *opth;
720 if (proto != NEXTHDR_HOP) {
721 ops = rcu_dereference(inet6_protos[proto]);
726 if (!(ops->flags & INET6_PROTO_GSO_EXTHDR))
730 if (unlikely(!pskb_may_pull(skb, 8)))
733 opth = (void *)skb->data;
734 len = ipv6_optlen(opth);
736 if (unlikely(!pskb_may_pull(skb, len)))
739 proto = opth->nexthdr;
740 __skb_pull(skb, len);
746 static int ipv6_gso_send_check(struct sk_buff *skb)
748 struct ipv6hdr *ipv6h;
749 const struct inet6_protocol *ops;
752 if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h))))
755 ipv6h = ipv6_hdr(skb);
756 __skb_pull(skb, sizeof(*ipv6h));
757 err = -EPROTONOSUPPORT;
760 ops = rcu_dereference(inet6_protos[
761 ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr)]);
763 if (likely(ops && ops->gso_send_check)) {
764 skb_reset_transport_header(skb);
765 err = ops->gso_send_check(skb);
773 static struct sk_buff *ipv6_gso_segment(struct sk_buff *skb, int features)
775 struct sk_buff *segs = ERR_PTR(-EINVAL);
776 struct ipv6hdr *ipv6h;
777 const struct inet6_protocol *ops;
779 struct frag_hdr *fptr;
780 unsigned int unfrag_ip6hlen;
784 if (!(features & NETIF_F_V6_CSUM))
785 features &= ~NETIF_F_SG;
787 if (unlikely(skb_shinfo(skb)->gso_type &
795 if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h))))
798 ipv6h = ipv6_hdr(skb);
799 __skb_pull(skb, sizeof(*ipv6h));
800 segs = ERR_PTR(-EPROTONOSUPPORT);
802 proto = ipv6_gso_pull_exthdrs(skb, ipv6h->nexthdr);
804 ops = rcu_dereference(inet6_protos[proto]);
805 if (likely(ops && ops->gso_segment)) {
806 skb_reset_transport_header(skb);
807 segs = ops->gso_segment(skb, features);
811 if (unlikely(IS_ERR(segs)))
814 for (skb = segs; skb; skb = skb->next) {
815 ipv6h = ipv6_hdr(skb);
816 ipv6h->payload_len = htons(skb->len - skb->mac_len -
818 if (proto == IPPROTO_UDP) {
819 unfrag_ip6hlen = ip6_find_1stfragopt(skb, &prevhdr);
820 fptr = (struct frag_hdr *)(skb_network_header(skb) +
822 fptr->frag_off = htons(offset);
823 if (skb->next != NULL)
824 fptr->frag_off |= htons(IP6_MF);
825 offset += (ntohs(ipv6h->payload_len) -
826 sizeof(struct frag_hdr));
835 struct napi_gro_cb napi;
839 #define IPV6_GRO_CB(skb) ((struct ipv6_gro_cb *)(skb)->cb)
841 static struct sk_buff **ipv6_gro_receive(struct sk_buff **head,
844 const struct inet6_protocol *ops;
845 struct sk_buff **pp = NULL;
855 off = skb_gro_offset(skb);
856 hlen = off + sizeof(*iph);
857 iph = skb_gro_header_fast(skb, off);
858 if (skb_gro_header_hard(skb, hlen)) {
859 iph = skb_gro_header_slow(skb, hlen, off);
864 skb_gro_pull(skb, sizeof(*iph));
865 skb_set_transport_header(skb, skb_gro_offset(skb));
867 flush += ntohs(iph->payload_len) != skb_gro_len(skb);
870 proto = iph->nexthdr;
871 ops = rcu_dereference(inet6_protos[proto]);
872 if (!ops || !ops->gro_receive) {
873 __pskb_pull(skb, skb_gro_offset(skb));
874 proto = ipv6_gso_pull_exthdrs(skb, proto);
875 skb_gro_pull(skb, -skb_transport_offset(skb));
876 skb_reset_transport_header(skb);
877 __skb_push(skb, skb_gro_offset(skb));
879 if (!ops || !ops->gro_receive)
885 IPV6_GRO_CB(skb)->proto = proto;
888 nlen = skb_network_header_len(skb);
890 for (p = *head; p; p = p->next) {
891 struct ipv6hdr *iph2;
893 if (!NAPI_GRO_CB(p)->same_flow)
898 /* All fields must match except length. */
899 if (nlen != skb_network_header_len(p) ||
900 memcmp(iph, iph2, offsetof(struct ipv6hdr, payload_len)) ||
901 memcmp(&iph->nexthdr, &iph2->nexthdr,
902 nlen - offsetof(struct ipv6hdr, nexthdr))) {
903 NAPI_GRO_CB(p)->same_flow = 0;
907 NAPI_GRO_CB(p)->flush |= flush;
910 NAPI_GRO_CB(skb)->flush |= flush;
913 skb_postpull_rcsum(skb, iph, skb_network_header_len(skb));
915 pp = ops->gro_receive(head, skb);
923 NAPI_GRO_CB(skb)->flush |= flush;
928 static int ipv6_gro_complete(struct sk_buff *skb)
930 const struct inet6_protocol *ops;
931 struct ipv6hdr *iph = ipv6_hdr(skb);
934 iph->payload_len = htons(skb->len - skb_network_offset(skb) -
938 ops = rcu_dereference(inet6_protos[IPV6_GRO_CB(skb)->proto]);
939 if (WARN_ON(!ops || !ops->gro_complete))
942 err = ops->gro_complete(skb);
950 static struct packet_type ipv6_packet_type __read_mostly = {
951 .type = cpu_to_be16(ETH_P_IPV6),
953 .gso_send_check = ipv6_gso_send_check,
954 .gso_segment = ipv6_gso_segment,
955 .gro_receive = ipv6_gro_receive,
956 .gro_complete = ipv6_gro_complete,
959 static int __init ipv6_packet_init(void)
961 dev_add_pack(&ipv6_packet_type);
965 static void ipv6_packet_cleanup(void)
967 dev_remove_pack(&ipv6_packet_type);
970 static int __net_init ipv6_init_mibs(struct net *net)
972 if (snmp_mib_init((void **)net->mib.udp_stats_in6,
973 sizeof (struct udp_mib)) < 0)
975 if (snmp_mib_init((void **)net->mib.udplite_stats_in6,
976 sizeof (struct udp_mib)) < 0)
977 goto err_udplite_mib;
978 if (snmp_mib_init((void **)net->mib.ipv6_statistics,
979 sizeof(struct ipstats_mib)) < 0)
981 if (snmp_mib_init((void **)net->mib.icmpv6_statistics,
982 sizeof(struct icmpv6_mib)) < 0)
984 if (snmp_mib_init((void **)net->mib.icmpv6msg_statistics,
985 sizeof(struct icmpv6msg_mib)) < 0)
986 goto err_icmpmsg_mib;
990 snmp_mib_free((void **)net->mib.icmpv6_statistics);
992 snmp_mib_free((void **)net->mib.ipv6_statistics);
994 snmp_mib_free((void **)net->mib.udplite_stats_in6);
996 snmp_mib_free((void **)net->mib.udp_stats_in6);
1000 static void __net_exit ipv6_cleanup_mibs(struct net *net)
1002 snmp_mib_free((void **)net->mib.udp_stats_in6);
1003 snmp_mib_free((void **)net->mib.udplite_stats_in6);
1004 snmp_mib_free((void **)net->mib.ipv6_statistics);
1005 snmp_mib_free((void **)net->mib.icmpv6_statistics);
1006 snmp_mib_free((void **)net->mib.icmpv6msg_statistics);
1009 static int __net_init inet6_net_init(struct net *net)
1013 net->ipv6.sysctl.bindv6only = 0;
1014 net->ipv6.sysctl.icmpv6_time = 1*HZ;
1016 err = ipv6_init_mibs(net);
1019 #ifdef CONFIG_PROC_FS
1020 err = udp6_proc_init(net);
1023 err = tcp6_proc_init(net);
1025 goto proc_tcp6_fail;
1026 err = ac6_proc_init(net);
1032 #ifdef CONFIG_PROC_FS
1034 tcp6_proc_exit(net);
1036 udp6_proc_exit(net);
1038 ipv6_cleanup_mibs(net);
1043 static void inet6_net_exit(struct net *net)
1045 #ifdef CONFIG_PROC_FS
1046 udp6_proc_exit(net);
1047 tcp6_proc_exit(net);
1050 ipv6_cleanup_mibs(net);
1053 static struct pernet_operations inet6_net_ops = {
1054 .init = inet6_net_init,
1055 .exit = inet6_net_exit,
1058 static int __init inet6_init(void)
1060 struct sk_buff *dummy_skb;
1061 struct list_head *r;
1064 BUILD_BUG_ON(sizeof(struct inet6_skb_parm) > sizeof(dummy_skb->cb));
1066 /* Register the socket-side information for inet6_create. */
1067 for(r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r)
1070 if (disable_ipv6_mod) {
1072 "IPv6: Loaded, but administratively disabled, "
1073 "reboot required to enable\n");
1077 err = proto_register(&tcpv6_prot, 1);
1081 err = proto_register(&udpv6_prot, 1);
1083 goto out_unregister_tcp_proto;
1085 err = proto_register(&udplitev6_prot, 1);
1087 goto out_unregister_udp_proto;
1089 err = proto_register(&rawv6_prot, 1);
1091 goto out_unregister_udplite_proto;
1094 /* We MUST register RAW sockets before we create the ICMP6,
1095 * IGMP6, or NDISC control sockets.
1099 goto out_unregister_raw_proto;
1101 /* Register the family here so that the init calls below will
1102 * be able to create sockets. (?? is this dangerous ??)
1104 err = sock_register(&inet6_family_ops);
1106 goto out_sock_register_fail;
1108 #ifdef CONFIG_SYSCTL
1109 err = ipv6_static_sysctl_register();
1111 goto static_sysctl_fail;
1114 * ipngwg API draft makes clear that the correct semantics
1115 * for TCP and UDP is to consider one TCP and UDP instance
1116 * in a host availiable by both INET and INET6 APIs and
1117 * able to communicate via both network protocols.
1120 err = register_pernet_subsys(&inet6_net_ops);
1122 goto register_pernet_fail;
1123 err = icmpv6_init();
1126 err = ip6_mr_init();
1135 err = ipv6_netfilter_init();
1137 goto netfilter_fail;
1138 /* Create /proc/foo6 entries. */
1139 #ifdef CONFIG_PROC_FS
1141 if (raw6_proc_init())
1142 goto proc_raw6_fail;
1143 if (udplite6_proc_init())
1144 goto proc_udplite6_fail;
1145 if (ipv6_misc_proc_init())
1146 goto proc_misc6_fail;
1147 if (if6_proc_init())
1150 err = ip6_route_init();
1152 goto ip6_route_fail;
1153 err = ip6_flowlabel_init();
1155 goto ip6_flowlabel_fail;
1156 err = addrconf_init();
1160 /* Init v6 extension headers. */
1161 err = ipv6_exthdrs_init();
1163 goto ipv6_exthdrs_fail;
1165 err = ipv6_frag_init();
1167 goto ipv6_frag_fail;
1169 /* Init v6 transport protocols. */
1174 err = udplitev6_init();
1176 goto udplitev6_fail;
1182 err = ipv6_packet_init();
1184 goto ipv6_packet_fail;
1186 #ifdef CONFIG_SYSCTL
1187 err = ipv6_sysctl_register();
1194 #ifdef CONFIG_SYSCTL
1196 ipv6_packet_cleanup();
1207 ipv6_exthdrs_exit();
1211 ip6_flowlabel_cleanup();
1213 ip6_route_cleanup();
1215 #ifdef CONFIG_PROC_FS
1218 ipv6_misc_proc_exit();
1220 udplite6_proc_exit();
1225 ipv6_netfilter_fini();
1235 unregister_pernet_subsys(&inet6_net_ops);
1236 register_pernet_fail:
1237 #ifdef CONFIG_SYSCTL
1238 ipv6_static_sysctl_unregister();
1241 sock_unregister(PF_INET6);
1242 rtnl_unregister_all(PF_INET6);
1243 out_sock_register_fail:
1245 out_unregister_raw_proto:
1246 proto_unregister(&rawv6_prot);
1247 out_unregister_udplite_proto:
1248 proto_unregister(&udplitev6_prot);
1249 out_unregister_udp_proto:
1250 proto_unregister(&udpv6_prot);
1251 out_unregister_tcp_proto:
1252 proto_unregister(&tcpv6_prot);
1255 module_init(inet6_init);
1257 static void __exit inet6_exit(void)
1259 if (disable_ipv6_mod)
1262 /* First of all disallow new sockets creation. */
1263 sock_unregister(PF_INET6);
1264 /* Disallow any further netlink messages */
1265 rtnl_unregister_all(PF_INET6);
1267 #ifdef CONFIG_SYSCTL
1268 ipv6_sysctl_unregister();
1274 /* Cleanup code parts. */
1275 ipv6_packet_cleanup();
1277 ipv6_exthdrs_exit();
1279 ip6_flowlabel_cleanup();
1280 ip6_route_cleanup();
1281 #ifdef CONFIG_PROC_FS
1283 /* Cleanup code parts. */
1285 ipv6_misc_proc_exit();
1286 udplite6_proc_exit();
1289 ipv6_netfilter_fini();
1296 unregister_pernet_subsys(&inet6_net_ops);
1297 #ifdef CONFIG_SYSCTL
1298 ipv6_static_sysctl_unregister();
1300 proto_unregister(&rawv6_prot);
1301 proto_unregister(&udplitev6_prot);
1302 proto_unregister(&udpv6_prot);
1303 proto_unregister(&tcpv6_prot);
1305 rcu_barrier(); /* Wait for completion of call_rcu()'s */
1307 module_exit(inet6_exit);
1309 MODULE_ALIAS_NETPROTO(PF_INET6);