2 * Internet Control Message Protocol (ICMPv6)
3 * Linux INET6 implementation
6 * Pedro Roque <roque@di.fc.ul.pt>
8 * Based on net/ipv4/icmp.c
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version
15 * 2 of the License, or (at your option) any later version.
21 * Andi Kleen : exception handling
22 * Andi Kleen add rate limits. never reply to a icmp.
23 * add more length checks and other fixes.
24 * yoshfuji : ensure to sent parameter problem for
26 * YOSHIFUJI Hideaki @USAGI: added sysctl for icmp rate limit.
28 * YOSHIFUJI Hideaki @USAGI: Per-interface statistics support
29 * Kazunori MIYAZAWA @USAGI: change output process to use ip6_append_data
32 #define pr_fmt(fmt) "IPv6: " fmt
34 #include <linux/module.h>
35 #include <linux/errno.h>
36 #include <linux/types.h>
37 #include <linux/socket.h>
39 #include <linux/kernel.h>
40 #include <linux/sockios.h>
41 #include <linux/net.h>
42 #include <linux/skbuff.h>
43 #include <linux/init.h>
44 #include <linux/netfilter.h>
45 #include <linux/slab.h>
48 #include <linux/sysctl.h>
51 #include <linux/inet.h>
52 #include <linux/netdevice.h>
53 #include <linux/icmpv6.h>
59 #include <net/ip6_checksum.h>
61 #include <net/protocol.h>
63 #include <net/rawv6.h>
64 #include <net/transp_v6.h>
65 #include <net/ip6_route.h>
66 #include <net/addrconf.h>
69 #include <net/inet_common.h>
70 #include <net/dsfield.h>
71 #include <net/l3mdev.h>
73 #include <asm/uaccess.h>
76 * The ICMP socket(s). This is the most convenient way to flow control
77 * our ICMP output as well as maintain a clean interface throughout
78 * all layers. All Socketless IP sends will soon be gone.
80 * On SMP we have one ICMP socket per-cpu.
82 static inline struct sock *icmpv6_sk(struct net *net)
84 return net->ipv6.icmp_sk[smp_processor_id()];
87 static void icmpv6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
88 u8 type, u8 code, int offset, __be32 info)
90 /* icmpv6_notify checks 8 bytes can be pulled, icmp6hdr is 8 bytes */
91 struct icmp6hdr *icmp6 = (struct icmp6hdr *) (skb->data + offset);
92 struct net *net = dev_net(skb->dev);
94 if (type == ICMPV6_PKT_TOOBIG)
95 ip6_update_pmtu(skb, net, info, 0, 0);
96 else if (type == NDISC_REDIRECT)
97 ip6_redirect(skb, net, skb->dev->ifindex, 0);
99 if (!(type & ICMPV6_INFOMSG_MASK))
100 if (icmp6->icmp6_type == ICMPV6_ECHO_REQUEST)
101 ping_err(skb, offset, info);
104 static int icmpv6_rcv(struct sk_buff *skb);
106 static const struct inet6_protocol icmpv6_protocol = {
107 .handler = icmpv6_rcv,
108 .err_handler = icmpv6_err,
109 .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL,
112 static __inline__ struct sock *icmpv6_xmit_lock(struct net *net)
119 if (unlikely(!spin_trylock(&sk->sk_lock.slock))) {
120 /* This can happen if the output path (f.e. SIT or
121 * ip6ip6 tunnel) signals dst_link_failure() for an
122 * outgoing ICMP6 packet.
130 static __inline__ void icmpv6_xmit_unlock(struct sock *sk)
132 spin_unlock_bh(&sk->sk_lock.slock);
136 * Figure out, may we reply to this packet with icmp error.
138 * We do not reply, if:
139 * - it was icmp error message.
140 * - it is truncated, so that it is known, that protocol is ICMPV6
141 * (i.e. in the middle of some exthdr)
146 static bool is_ineligible(const struct sk_buff *skb)
148 int ptr = (u8 *)(ipv6_hdr(skb) + 1) - skb->data;
149 int len = skb->len - ptr;
150 __u8 nexthdr = ipv6_hdr(skb)->nexthdr;
156 ptr = ipv6_skip_exthdr(skb, ptr, &nexthdr, &frag_off);
159 if (nexthdr == IPPROTO_ICMPV6) {
161 tp = skb_header_pointer(skb,
162 ptr+offsetof(struct icmp6hdr, icmp6_type),
163 sizeof(_type), &_type);
164 if (!tp || !(*tp & ICMPV6_INFOMSG_MASK))
171 * Check the ICMP output rate limit
173 static bool icmpv6_xrlim_allow(struct sock *sk, u8 type,
176 struct net *net = sock_net(sk);
177 struct dst_entry *dst;
180 /* Informational messages are not limited. */
181 if (type & ICMPV6_INFOMSG_MASK)
184 /* Do not limit pmtu discovery, it would break it. */
185 if (type == ICMPV6_PKT_TOOBIG)
189 * Look up the output route.
190 * XXX: perhaps the expire for routing entries cloned by
191 * this lookup should be more aggressive (not longer than timeout).
193 dst = ip6_route_output(net, sk, fl6);
195 IP6_INC_STATS(net, ip6_dst_idev(dst),
196 IPSTATS_MIB_OUTNOROUTES);
197 } else if (dst->dev && (dst->dev->flags&IFF_LOOPBACK)) {
200 struct rt6_info *rt = (struct rt6_info *)dst;
201 int tmo = net->ipv6.sysctl.icmpv6_time;
203 /* Give more bandwidth to wider prefixes. */
204 if (rt->rt6i_dst.plen < 128)
205 tmo >>= ((128 - rt->rt6i_dst.plen)>>5);
207 if (icmp_global_allow()) {
208 struct inet_peer *peer;
210 peer = inet_getpeer_v6(net->ipv6.peers,
212 res = inet_peer_xrlim_allow(peer, tmo);
222 * an inline helper for the "simple" if statement below
223 * checks if parameter problem report is caused by an
224 * unrecognized IPv6 option that has the Option Type
225 * highest-order two bits set to 10
228 static bool opt_unrec(struct sk_buff *skb, __u32 offset)
232 offset += skb_network_offset(skb);
233 op = skb_header_pointer(skb, offset, sizeof(_optval), &_optval);
236 return (*op & 0xC0) == 0x80;
239 int icmpv6_push_pending_frames(struct sock *sk, struct flowi6 *fl6,
240 struct icmp6hdr *thdr, int len)
243 struct icmp6hdr *icmp6h;
246 skb = skb_peek(&sk->sk_write_queue);
250 icmp6h = icmp6_hdr(skb);
251 memcpy(icmp6h, thdr, sizeof(struct icmp6hdr));
252 icmp6h->icmp6_cksum = 0;
254 if (skb_queue_len(&sk->sk_write_queue) == 1) {
255 skb->csum = csum_partial(icmp6h,
256 sizeof(struct icmp6hdr), skb->csum);
257 icmp6h->icmp6_cksum = csum_ipv6_magic(&fl6->saddr,
259 len, fl6->flowi6_proto,
264 skb_queue_walk(&sk->sk_write_queue, skb) {
265 tmp_csum = csum_add(tmp_csum, skb->csum);
268 tmp_csum = csum_partial(icmp6h,
269 sizeof(struct icmp6hdr), tmp_csum);
270 icmp6h->icmp6_cksum = csum_ipv6_magic(&fl6->saddr,
272 len, fl6->flowi6_proto,
275 ip6_push_pending_frames(sk);
286 static int icmpv6_getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb)
288 struct icmpv6_msg *msg = (struct icmpv6_msg *) from;
289 struct sk_buff *org_skb = msg->skb;
292 csum = skb_copy_and_csum_bits(org_skb, msg->offset + offset,
294 skb->csum = csum_block_add(skb->csum, csum, odd);
295 if (!(msg->type & ICMPV6_INFOMSG_MASK))
296 nf_ct_attach(skb, org_skb);
300 #if IS_ENABLED(CONFIG_IPV6_MIP6)
301 static void mip6_addr_swap(struct sk_buff *skb)
303 struct ipv6hdr *iph = ipv6_hdr(skb);
304 struct inet6_skb_parm *opt = IP6CB(skb);
305 struct ipv6_destopt_hao *hao;
310 off = ipv6_find_tlv(skb, opt->dsthao, IPV6_TLV_HAO);
311 if (likely(off >= 0)) {
312 hao = (struct ipv6_destopt_hao *)
313 (skb_network_header(skb) + off);
315 iph->saddr = hao->addr;
321 static inline void mip6_addr_swap(struct sk_buff *skb) {}
324 static struct dst_entry *icmpv6_route_lookup(struct net *net,
329 struct dst_entry *dst, *dst2;
333 err = ip6_dst_lookup(net, sk, &dst, fl6);
338 * We won't send icmp if the destination is known
341 if (ipv6_anycast_destination(dst, &fl6->daddr)) {
342 net_dbg_ratelimited("icmp6_send: acast source\n");
344 return ERR_PTR(-EINVAL);
347 /* No need to clone since we're just using its address. */
350 dst = xfrm_lookup(net, dst, flowi6_to_flowi(fl6), sk, 0);
355 if (PTR_ERR(dst) == -EPERM)
361 err = xfrm_decode_session_reverse(skb, flowi6_to_flowi(&fl2), AF_INET6);
363 goto relookup_failed;
365 err = ip6_dst_lookup(net, sk, &dst2, &fl2);
367 goto relookup_failed;
369 dst2 = xfrm_lookup(net, dst2, flowi6_to_flowi(&fl2), sk, XFRM_LOOKUP_ICMP);
379 goto relookup_failed;
389 * Send an ICMP message in response to a packet in error
391 static void icmp6_send(struct sk_buff *skb, u8 type, u8 code, __u32 info)
393 struct net *net = dev_net(skb->dev);
394 struct inet6_dev *idev = NULL;
395 struct ipv6hdr *hdr = ipv6_hdr(skb);
397 struct ipv6_pinfo *np;
398 const struct in6_addr *saddr = NULL;
399 struct dst_entry *dst;
400 struct icmp6hdr tmp_hdr;
402 struct icmpv6_msg msg;
408 u32 mark = IP6_REPLY_MARK(net, skb->mark);
410 if ((u8 *)hdr < skb->head ||
411 (skb_network_header(skb) + sizeof(*hdr)) > skb_tail_pointer(skb))
415 * Make sure we respect the rules
416 * i.e. RFC 1885 2.4(e)
417 * Rule (e.1) is enforced by not using icmp6_send
418 * in any code that processes icmp errors.
420 addr_type = ipv6_addr_type(&hdr->daddr);
422 if (ipv6_chk_addr(net, &hdr->daddr, skb->dev, 0) ||
423 ipv6_chk_acast_addr_src(net, skb->dev, &hdr->daddr))
430 if (addr_type & IPV6_ADDR_MULTICAST || skb->pkt_type != PACKET_HOST) {
431 if (type != ICMPV6_PKT_TOOBIG &&
432 !(type == ICMPV6_PARAMPROB &&
433 code == ICMPV6_UNK_OPTION &&
434 (opt_unrec(skb, info))))
440 addr_type = ipv6_addr_type(&hdr->saddr);
446 if (__ipv6_addr_needs_scope_id(addr_type))
447 iif = skb->dev->ifindex;
450 * Must not send error if the source does not uniquely
451 * identify a single node (RFC2463 Section 2.4).
452 * We check unspecified / multicast addresses here,
453 * and anycast addresses will be checked later.
455 if ((addr_type == IPV6_ADDR_ANY) || (addr_type & IPV6_ADDR_MULTICAST)) {
456 net_dbg_ratelimited("icmp6_send: addr_any/mcast source\n");
461 * Never answer to a ICMP packet.
463 if (is_ineligible(skb)) {
464 net_dbg_ratelimited("icmp6_send: no reply to icmp error\n");
470 memset(&fl6, 0, sizeof(fl6));
471 fl6.flowi6_proto = IPPROTO_ICMPV6;
472 fl6.daddr = hdr->saddr;
475 fl6.flowi6_mark = mark;
476 fl6.flowi6_oif = iif;
477 fl6.fl6_icmp_type = type;
478 fl6.fl6_icmp_code = code;
479 security_skb_classify_flow(skb, flowi6_to_flowi(&fl6));
481 sk = icmpv6_xmit_lock(net);
487 if (!icmpv6_xrlim_allow(sk, type, &fl6))
490 tmp_hdr.icmp6_type = type;
491 tmp_hdr.icmp6_code = code;
492 tmp_hdr.icmp6_cksum = 0;
493 tmp_hdr.icmp6_pointer = htonl(info);
495 if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr))
496 fl6.flowi6_oif = np->mcast_oif;
497 else if (!fl6.flowi6_oif)
498 fl6.flowi6_oif = np->ucast_oif;
501 fl6.flowi6_oif = l3mdev_master_ifindex(skb->dev);
503 dst = icmpv6_route_lookup(net, skb, sk, &fl6);
507 hlimit = ip6_sk_dst_hoplimit(np, &fl6, dst);
510 msg.offset = skb_network_offset(skb);
513 len = skb->len - msg.offset;
514 len = min_t(unsigned int, len, IPV6_MIN_MTU - sizeof(struct ipv6hdr) - sizeof(struct icmp6hdr));
516 net_dbg_ratelimited("icmp: len problem\n");
517 goto out_dst_release;
521 idev = __in6_dev_get(skb->dev);
523 err = ip6_append_data(sk, icmpv6_getfrag, &msg,
524 len + sizeof(struct icmp6hdr),
525 sizeof(struct icmp6hdr), hlimit,
526 np->tclass, NULL, &fl6, (struct rt6_info *)dst,
527 MSG_DONTWAIT, np->dontfrag);
529 ICMP6_INC_STATS(net, idev, ICMP6_MIB_OUTERRORS);
530 ip6_flush_pending_frames(sk);
532 err = icmpv6_push_pending_frames(sk, &fl6, &tmp_hdr,
533 len + sizeof(struct icmp6hdr));
539 icmpv6_xmit_unlock(sk);
542 /* Slightly more convenient version of icmp6_send.
544 void icmpv6_param_prob(struct sk_buff *skb, u8 code, int pos)
546 icmp6_send(skb, ICMPV6_PARAMPROB, code, pos);
550 static void icmpv6_echo_reply(struct sk_buff *skb)
552 struct net *net = dev_net(skb->dev);
554 struct inet6_dev *idev;
555 struct ipv6_pinfo *np;
556 const struct in6_addr *saddr = NULL;
557 struct icmp6hdr *icmph = icmp6_hdr(skb);
558 struct icmp6hdr tmp_hdr;
560 struct icmpv6_msg msg;
561 struct dst_entry *dst;
565 u32 mark = IP6_REPLY_MARK(net, skb->mark);
567 saddr = &ipv6_hdr(skb)->daddr;
569 if (!ipv6_unicast_destination(skb) &&
570 !(net->ipv6.sysctl.anycast_src_echo_reply &&
571 ipv6_anycast_destination(skb_dst(skb), saddr)))
574 memcpy(&tmp_hdr, icmph, sizeof(tmp_hdr));
575 tmp_hdr.icmp6_type = ICMPV6_ECHO_REPLY;
577 memset(&fl6, 0, sizeof(fl6));
578 fl6.flowi6_proto = IPPROTO_ICMPV6;
579 fl6.daddr = ipv6_hdr(skb)->saddr;
582 fl6.flowi6_oif = l3mdev_fib_oif(skb->dev);
583 fl6.fl6_icmp_type = ICMPV6_ECHO_REPLY;
584 fl6.flowi6_mark = mark;
585 security_skb_classify_flow(skb, flowi6_to_flowi(&fl6));
587 sk = icmpv6_xmit_lock(net);
593 if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr))
594 fl6.flowi6_oif = np->mcast_oif;
595 else if (!fl6.flowi6_oif)
596 fl6.flowi6_oif = np->ucast_oif;
598 err = ip6_dst_lookup(net, sk, &dst, &fl6);
601 dst = xfrm_lookup(net, dst, flowi6_to_flowi(&fl6), sk, 0);
605 hlimit = ip6_sk_dst_hoplimit(np, &fl6, dst);
607 idev = __in6_dev_get(skb->dev);
611 msg.type = ICMPV6_ECHO_REPLY;
613 tclass = ipv6_get_dsfield(ipv6_hdr(skb));
614 err = ip6_append_data(sk, icmpv6_getfrag, &msg, skb->len + sizeof(struct icmp6hdr),
615 sizeof(struct icmp6hdr), hlimit, tclass, NULL, &fl6,
616 (struct rt6_info *)dst, MSG_DONTWAIT,
620 ICMP6_INC_STATS_BH(net, idev, ICMP6_MIB_OUTERRORS);
621 ip6_flush_pending_frames(sk);
623 err = icmpv6_push_pending_frames(sk, &fl6, &tmp_hdr,
624 skb->len + sizeof(struct icmp6hdr));
628 icmpv6_xmit_unlock(sk);
631 void icmpv6_notify(struct sk_buff *skb, u8 type, u8 code, __be32 info)
633 const struct inet6_protocol *ipprot;
637 struct net *net = dev_net(skb->dev);
639 if (!pskb_may_pull(skb, sizeof(struct ipv6hdr)))
642 nexthdr = ((struct ipv6hdr *)skb->data)->nexthdr;
643 if (ipv6_ext_hdr(nexthdr)) {
644 /* now skip over extension headers */
645 inner_offset = ipv6_skip_exthdr(skb, sizeof(struct ipv6hdr),
646 &nexthdr, &frag_off);
647 if (inner_offset < 0)
650 inner_offset = sizeof(struct ipv6hdr);
653 /* Checkin header including 8 bytes of inner protocol header. */
654 if (!pskb_may_pull(skb, inner_offset+8))
657 /* BUGGG_FUTURE: we should try to parse exthdrs in this packet.
658 Without this we will not able f.e. to make source routed
660 Corresponding argument (opt) to notifiers is already added.
664 ipprot = rcu_dereference(inet6_protos[nexthdr]);
665 if (ipprot && ipprot->err_handler)
666 ipprot->err_handler(skb, NULL, type, code, inner_offset, info);
668 raw6_icmp_error(skb, nexthdr, type, code, inner_offset, info);
672 ICMP6_INC_STATS_BH(net, __in6_dev_get(skb->dev), ICMP6_MIB_INERRORS);
676 * Handle icmp messages
679 static int icmpv6_rcv(struct sk_buff *skb)
681 struct net_device *dev = skb->dev;
682 struct inet6_dev *idev = __in6_dev_get(dev);
683 const struct in6_addr *saddr, *daddr;
684 struct icmp6hdr *hdr;
686 bool success = false;
688 if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) {
689 struct sec_path *sp = skb_sec_path(skb);
692 if (!(sp && sp->xvec[sp->len - 1]->props.flags &
696 if (!pskb_may_pull(skb, sizeof(*hdr) + sizeof(struct ipv6hdr)))
699 nh = skb_network_offset(skb);
700 skb_set_network_header(skb, sizeof(*hdr));
702 if (!xfrm6_policy_check_reverse(NULL, XFRM_POLICY_IN, skb))
705 skb_set_network_header(skb, nh);
708 ICMP6_INC_STATS_BH(dev_net(dev), idev, ICMP6_MIB_INMSGS);
710 saddr = &ipv6_hdr(skb)->saddr;
711 daddr = &ipv6_hdr(skb)->daddr;
713 if (skb_checksum_validate(skb, IPPROTO_ICMPV6, ip6_compute_pseudo)) {
714 net_dbg_ratelimited("ICMPv6 checksum failed [%pI6c > %pI6c]\n",
719 if (!pskb_pull(skb, sizeof(*hdr)))
722 hdr = icmp6_hdr(skb);
724 type = hdr->icmp6_type;
726 ICMP6MSGIN_INC_STATS_BH(dev_net(dev), idev, type);
729 case ICMPV6_ECHO_REQUEST:
730 icmpv6_echo_reply(skb);
733 case ICMPV6_ECHO_REPLY:
734 success = ping_rcv(skb);
737 case ICMPV6_PKT_TOOBIG:
738 /* BUGGG_FUTURE: if packet contains rthdr, we cannot update
739 standard destination cache. Seems, only "advanced"
740 destination cache will allow to solve this problem
743 if (!pskb_may_pull(skb, sizeof(struct ipv6hdr)))
745 hdr = icmp6_hdr(skb);
748 * Drop through to notify
751 case ICMPV6_DEST_UNREACH:
752 case ICMPV6_TIME_EXCEED:
753 case ICMPV6_PARAMPROB:
754 icmpv6_notify(skb, type, hdr->icmp6_code, hdr->icmp6_mtu);
757 case NDISC_ROUTER_SOLICITATION:
758 case NDISC_ROUTER_ADVERTISEMENT:
759 case NDISC_NEIGHBOUR_SOLICITATION:
760 case NDISC_NEIGHBOUR_ADVERTISEMENT:
765 case ICMPV6_MGM_QUERY:
766 igmp6_event_query(skb);
769 case ICMPV6_MGM_REPORT:
770 igmp6_event_report(skb);
773 case ICMPV6_MGM_REDUCTION:
774 case ICMPV6_NI_QUERY:
775 case ICMPV6_NI_REPLY:
776 case ICMPV6_MLD2_REPORT:
777 case ICMPV6_DHAAD_REQUEST:
778 case ICMPV6_DHAAD_REPLY:
779 case ICMPV6_MOBILE_PREFIX_SOL:
780 case ICMPV6_MOBILE_PREFIX_ADV:
785 if (type & ICMPV6_INFOMSG_MASK)
788 net_dbg_ratelimited("icmpv6: msg of unknown type\n");
791 * error of unknown type.
792 * must pass to upper level
795 icmpv6_notify(skb, type, hdr->icmp6_code, hdr->icmp6_mtu);
798 /* until the v6 path can be better sorted assume failure and
799 * preserve the status quo behaviour for the rest of the paths to here
809 ICMP6_INC_STATS_BH(dev_net(dev), idev, ICMP6_MIB_CSUMERRORS);
811 ICMP6_INC_STATS_BH(dev_net(dev), idev, ICMP6_MIB_INERRORS);
817 void icmpv6_flow_init(struct sock *sk, struct flowi6 *fl6,
819 const struct in6_addr *saddr,
820 const struct in6_addr *daddr,
823 memset(fl6, 0, sizeof(*fl6));
826 fl6->flowi6_proto = IPPROTO_ICMPV6;
827 fl6->fl6_icmp_type = type;
828 fl6->fl6_icmp_code = 0;
829 fl6->flowi6_oif = oif;
830 security_sk_classify_flow(sk, flowi6_to_flowi(fl6));
834 * Special lock-class for __icmpv6_sk:
836 static struct lock_class_key icmpv6_socket_sk_dst_lock_key;
838 static int __net_init icmpv6_sk_init(struct net *net)
844 kzalloc(nr_cpu_ids * sizeof(struct sock *), GFP_KERNEL);
845 if (!net->ipv6.icmp_sk)
848 for_each_possible_cpu(i) {
849 err = inet_ctl_sock_create(&sk, PF_INET6,
850 SOCK_RAW, IPPROTO_ICMPV6, net);
852 pr_err("Failed to initialize the ICMP6 control socket (err %d)\n",
857 net->ipv6.icmp_sk[i] = sk;
860 * Split off their lock-class, because sk->sk_dst_lock
861 * gets used from softirqs, which is safe for
862 * __icmpv6_sk (because those never get directly used
863 * via userspace syscalls), but unsafe for normal sockets.
865 lockdep_set_class(&sk->sk_dst_lock,
866 &icmpv6_socket_sk_dst_lock_key);
868 /* Enough space for 2 64K ICMP packets, including
869 * sk_buff struct overhead.
871 sk->sk_sndbuf = 2 * SKB_TRUESIZE(64 * 1024);
876 for (j = 0; j < i; j++)
877 inet_ctl_sock_destroy(net->ipv6.icmp_sk[j]);
878 kfree(net->ipv6.icmp_sk);
882 static void __net_exit icmpv6_sk_exit(struct net *net)
886 for_each_possible_cpu(i) {
887 inet_ctl_sock_destroy(net->ipv6.icmp_sk[i]);
889 kfree(net->ipv6.icmp_sk);
892 static struct pernet_operations icmpv6_sk_ops = {
893 .init = icmpv6_sk_init,
894 .exit = icmpv6_sk_exit,
897 int __init icmpv6_init(void)
901 err = register_pernet_subsys(&icmpv6_sk_ops);
906 if (inet6_add_protocol(&icmpv6_protocol, IPPROTO_ICMPV6) < 0)
909 err = inet6_register_icmp_sender(icmp6_send);
915 inet6_del_protocol(&icmpv6_protocol, IPPROTO_ICMPV6);
917 pr_err("Failed to register ICMP6 protocol\n");
918 unregister_pernet_subsys(&icmpv6_sk_ops);
922 void icmpv6_cleanup(void)
924 inet6_unregister_icmp_sender(icmp6_send);
925 unregister_pernet_subsys(&icmpv6_sk_ops);
926 inet6_del_protocol(&icmpv6_protocol, IPPROTO_ICMPV6);
930 static const struct icmp6_err {
938 { /* ADM_PROHIBITED */
942 { /* Was NOT_NEIGHBOUR, now reserved */
964 int icmpv6_err_convert(u8 type, u8 code, int *err)
971 case ICMPV6_DEST_UNREACH:
973 if (code < ARRAY_SIZE(tab_unreach)) {
974 *err = tab_unreach[code].err;
975 fatal = tab_unreach[code].fatal;
979 case ICMPV6_PKT_TOOBIG:
983 case ICMPV6_PARAMPROB:
988 case ICMPV6_TIME_EXCEED:
995 EXPORT_SYMBOL(icmpv6_err_convert);
998 static struct ctl_table ipv6_icmp_table_template[] = {
1000 .procname = "ratelimit",
1001 .data = &init_net.ipv6.sysctl.icmpv6_time,
1002 .maxlen = sizeof(int),
1004 .proc_handler = proc_dointvec_ms_jiffies,
1009 struct ctl_table * __net_init ipv6_icmp_sysctl_init(struct net *net)
1011 struct ctl_table *table;
1013 table = kmemdup(ipv6_icmp_table_template,
1014 sizeof(ipv6_icmp_table_template),
1018 table[0].data = &net->ipv6.sysctl.icmpv6_time;