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>
72 #include <asm/uaccess.h>
75 * The ICMP socket(s). This is the most convenient way to flow control
76 * our ICMP output as well as maintain a clean interface throughout
77 * all layers. All Socketless IP sends will soon be gone.
79 * On SMP we have one ICMP socket per-cpu.
81 static inline struct sock *icmpv6_sk(struct net *net)
83 return net->ipv6.icmp_sk[smp_processor_id()];
86 static void icmpv6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
87 u8 type, u8 code, int offset, __be32 info)
89 /* icmpv6_notify checks 8 bytes can be pulled, icmp6hdr is 8 bytes */
90 struct icmp6hdr *icmp6 = (struct icmp6hdr *) (skb->data + offset);
91 struct net *net = dev_net(skb->dev);
93 if (type == ICMPV6_PKT_TOOBIG)
94 ip6_update_pmtu(skb, net, info, 0, 0);
95 else if (type == NDISC_REDIRECT)
96 ip6_redirect(skb, net, skb->dev->ifindex, 0);
98 if (!(type & ICMPV6_INFOMSG_MASK))
99 if (icmp6->icmp6_type == ICMPV6_ECHO_REQUEST)
100 ping_err(skb, offset, info);
103 static int icmpv6_rcv(struct sk_buff *skb);
105 static const struct inet6_protocol icmpv6_protocol = {
106 .handler = icmpv6_rcv,
107 .err_handler = icmpv6_err,
108 .flags = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL,
111 static __inline__ struct sock *icmpv6_xmit_lock(struct net *net)
118 if (unlikely(!spin_trylock(&sk->sk_lock.slock))) {
119 /* This can happen if the output path (f.e. SIT or
120 * ip6ip6 tunnel) signals dst_link_failure() for an
121 * outgoing ICMP6 packet.
129 static __inline__ void icmpv6_xmit_unlock(struct sock *sk)
131 spin_unlock_bh(&sk->sk_lock.slock);
135 * Figure out, may we reply to this packet with icmp error.
137 * We do not reply, if:
138 * - it was icmp error message.
139 * - it is truncated, so that it is known, that protocol is ICMPV6
140 * (i.e. in the middle of some exthdr)
145 static bool is_ineligible(const struct sk_buff *skb)
147 int ptr = (u8 *)(ipv6_hdr(skb) + 1) - skb->data;
148 int len = skb->len - ptr;
149 __u8 nexthdr = ipv6_hdr(skb)->nexthdr;
155 ptr = ipv6_skip_exthdr(skb, ptr, &nexthdr, &frag_off);
158 if (nexthdr == IPPROTO_ICMPV6) {
160 tp = skb_header_pointer(skb,
161 ptr+offsetof(struct icmp6hdr, icmp6_type),
162 sizeof(_type), &_type);
164 !(*tp & ICMPV6_INFOMSG_MASK))
171 * Check the ICMP output rate limit
173 static inline bool icmpv6_xrlim_allow(struct sock *sk, u8 type,
176 struct dst_entry *dst;
177 struct net *net = sock_net(sk);
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;
202 struct inet_peer *peer;
204 /* Give more bandwidth to wider prefixes. */
205 if (rt->rt6i_dst.plen < 128)
206 tmo >>= ((128 - rt->rt6i_dst.plen)>>5);
208 peer = inet_getpeer_v6(net->ipv6.peers, &rt->rt6i_dst.addr, 1);
209 res = inet_peer_xrlim_allow(peer, tmo);
218 * an inline helper for the "simple" if statement below
219 * checks if parameter problem report is caused by an
220 * unrecognized IPv6 option that has the Option Type
221 * highest-order two bits set to 10
224 static bool opt_unrec(struct sk_buff *skb, __u32 offset)
228 offset += skb_network_offset(skb);
229 op = skb_header_pointer(skb, offset, sizeof(_optval), &_optval);
232 return (*op & 0xC0) == 0x80;
235 int icmpv6_push_pending_frames(struct sock *sk, struct flowi6 *fl6,
236 struct icmp6hdr *thdr, int len)
239 struct icmp6hdr *icmp6h;
242 if ((skb = skb_peek(&sk->sk_write_queue)) == NULL)
245 icmp6h = icmp6_hdr(skb);
246 memcpy(icmp6h, thdr, sizeof(struct icmp6hdr));
247 icmp6h->icmp6_cksum = 0;
249 if (skb_queue_len(&sk->sk_write_queue) == 1) {
250 skb->csum = csum_partial(icmp6h,
251 sizeof(struct icmp6hdr), skb->csum);
252 icmp6h->icmp6_cksum = csum_ipv6_magic(&fl6->saddr,
254 len, fl6->flowi6_proto,
259 skb_queue_walk(&sk->sk_write_queue, skb) {
260 tmp_csum = csum_add(tmp_csum, skb->csum);
263 tmp_csum = csum_partial(icmp6h,
264 sizeof(struct icmp6hdr), tmp_csum);
265 icmp6h->icmp6_cksum = csum_ipv6_magic(&fl6->saddr,
267 len, fl6->flowi6_proto,
270 ip6_push_pending_frames(sk);
281 static int icmpv6_getfrag(void *from, char *to, int offset, int len, int odd, struct sk_buff *skb)
283 struct icmpv6_msg *msg = (struct icmpv6_msg *) from;
284 struct sk_buff *org_skb = msg->skb;
287 csum = skb_copy_and_csum_bits(org_skb, msg->offset + offset,
289 skb->csum = csum_block_add(skb->csum, csum, odd);
290 if (!(msg->type & ICMPV6_INFOMSG_MASK))
291 nf_ct_attach(skb, org_skb);
295 #if IS_ENABLED(CONFIG_IPV6_MIP6)
296 static void mip6_addr_swap(struct sk_buff *skb)
298 struct ipv6hdr *iph = ipv6_hdr(skb);
299 struct inet6_skb_parm *opt = IP6CB(skb);
300 struct ipv6_destopt_hao *hao;
305 off = ipv6_find_tlv(skb, opt->dsthao, IPV6_TLV_HAO);
306 if (likely(off >= 0)) {
307 hao = (struct ipv6_destopt_hao *)
308 (skb_network_header(skb) + off);
310 iph->saddr = hao->addr;
316 static inline void mip6_addr_swap(struct sk_buff *skb) {}
319 static struct dst_entry *icmpv6_route_lookup(struct net *net,
324 struct dst_entry *dst, *dst2;
328 err = ip6_dst_lookup(sk, &dst, fl6);
333 * We won't send icmp if the destination is known
336 if (((struct rt6_info *)dst)->rt6i_flags & RTF_ANYCAST) {
337 LIMIT_NETDEBUG(KERN_DEBUG "icmp6_send: acast source\n");
339 return ERR_PTR(-EINVAL);
342 /* No need to clone since we're just using its address. */
345 dst = xfrm_lookup(net, dst, flowi6_to_flowi(fl6), sk, 0);
350 if (PTR_ERR(dst) == -EPERM)
356 err = xfrm_decode_session_reverse(skb, flowi6_to_flowi(&fl2), AF_INET6);
358 goto relookup_failed;
360 err = ip6_dst_lookup(sk, &dst2, &fl2);
362 goto relookup_failed;
364 dst2 = xfrm_lookup(net, dst2, flowi6_to_flowi(&fl2), sk, XFRM_LOOKUP_ICMP);
374 goto relookup_failed;
384 * Send an ICMP message in response to a packet in error
386 static void icmp6_send(struct sk_buff *skb, u8 type, u8 code, __u32 info)
388 struct net *net = dev_net(skb->dev);
389 struct inet6_dev *idev = NULL;
390 struct ipv6hdr *hdr = ipv6_hdr(skb);
392 struct ipv6_pinfo *np;
393 const struct in6_addr *saddr = NULL;
394 struct dst_entry *dst;
395 struct icmp6hdr tmp_hdr;
397 struct icmpv6_msg msg;
403 u32 mark = IP6_REPLY_MARK(net, skb->mark);
405 if ((u8 *)hdr < skb->head ||
406 (skb_network_header(skb) + sizeof(*hdr)) > skb_tail_pointer(skb))
410 * Make sure we respect the rules
411 * i.e. RFC 1885 2.4(e)
412 * Rule (e.1) is enforced by not using icmp6_send
413 * in any code that processes icmp errors.
415 addr_type = ipv6_addr_type(&hdr->daddr);
417 if (ipv6_chk_addr(net, &hdr->daddr, skb->dev, 0) ||
418 ipv6_chk_acast_addr_src(net, skb->dev, &hdr->daddr))
425 if ((addr_type & IPV6_ADDR_MULTICAST || skb->pkt_type != PACKET_HOST)) {
426 if (type != ICMPV6_PKT_TOOBIG &&
427 !(type == ICMPV6_PARAMPROB &&
428 code == ICMPV6_UNK_OPTION &&
429 (opt_unrec(skb, info))))
435 addr_type = ipv6_addr_type(&hdr->saddr);
441 if (__ipv6_addr_needs_scope_id(addr_type))
442 iif = skb->dev->ifindex;
445 * Must not send error if the source does not uniquely
446 * identify a single node (RFC2463 Section 2.4).
447 * We check unspecified / multicast addresses here,
448 * and anycast addresses will be checked later.
450 if ((addr_type == IPV6_ADDR_ANY) || (addr_type & IPV6_ADDR_MULTICAST)) {
451 LIMIT_NETDEBUG(KERN_DEBUG "icmp6_send: addr_any/mcast source\n");
456 * Never answer to a ICMP packet.
458 if (is_ineligible(skb)) {
459 LIMIT_NETDEBUG(KERN_DEBUG "icmp6_send: no reply to icmp error\n");
465 memset(&fl6, 0, sizeof(fl6));
466 fl6.flowi6_proto = IPPROTO_ICMPV6;
467 fl6.daddr = hdr->saddr;
470 fl6.flowi6_mark = mark;
471 fl6.flowi6_oif = iif;
472 fl6.fl6_icmp_type = type;
473 fl6.fl6_icmp_code = code;
474 security_skb_classify_flow(skb, flowi6_to_flowi(&fl6));
476 sk = icmpv6_xmit_lock(net);
482 if (!icmpv6_xrlim_allow(sk, type, &fl6))
485 tmp_hdr.icmp6_type = type;
486 tmp_hdr.icmp6_code = code;
487 tmp_hdr.icmp6_cksum = 0;
488 tmp_hdr.icmp6_pointer = htonl(info);
490 if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr))
491 fl6.flowi6_oif = np->mcast_oif;
492 else if (!fl6.flowi6_oif)
493 fl6.flowi6_oif = np->ucast_oif;
495 dst = icmpv6_route_lookup(net, skb, sk, &fl6);
499 hlimit = ip6_sk_dst_hoplimit(np, &fl6, dst);
502 msg.offset = skb_network_offset(skb);
505 len = skb->len - msg.offset;
506 len = min_t(unsigned int, len, IPV6_MIN_MTU - sizeof(struct ipv6hdr) -sizeof(struct icmp6hdr));
508 LIMIT_NETDEBUG(KERN_DEBUG "icmp: len problem\n");
509 goto out_dst_release;
513 idev = __in6_dev_get(skb->dev);
515 err = ip6_append_data(sk, icmpv6_getfrag, &msg,
516 len + sizeof(struct icmp6hdr),
517 sizeof(struct icmp6hdr), hlimit,
518 np->tclass, NULL, &fl6, (struct rt6_info *)dst,
519 MSG_DONTWAIT, np->dontfrag);
521 ICMP6_INC_STATS(net, idev, ICMP6_MIB_OUTERRORS);
522 ip6_flush_pending_frames(sk);
524 err = icmpv6_push_pending_frames(sk, &fl6, &tmp_hdr,
525 len + sizeof(struct icmp6hdr));
531 icmpv6_xmit_unlock(sk);
534 /* Slightly more convenient version of icmp6_send.
536 void icmpv6_param_prob(struct sk_buff *skb, u8 code, int pos)
538 icmp6_send(skb, ICMPV6_PARAMPROB, code, pos);
542 static void icmpv6_echo_reply(struct sk_buff *skb)
544 struct net *net = dev_net(skb->dev);
546 struct inet6_dev *idev;
547 struct ipv6_pinfo *np;
548 const struct in6_addr *saddr = NULL;
549 struct icmp6hdr *icmph = icmp6_hdr(skb);
550 struct icmp6hdr tmp_hdr;
552 struct icmpv6_msg msg;
553 struct dst_entry *dst;
557 u32 mark = IP6_REPLY_MARK(net, skb->mark);
559 saddr = &ipv6_hdr(skb)->daddr;
561 if (!ipv6_unicast_destination(skb) &&
562 !(net->ipv6.sysctl.anycast_src_echo_reply &&
563 ipv6_anycast_destination(skb)))
566 memcpy(&tmp_hdr, icmph, sizeof(tmp_hdr));
567 tmp_hdr.icmp6_type = ICMPV6_ECHO_REPLY;
569 memset(&fl6, 0, sizeof(fl6));
570 fl6.flowi6_proto = IPPROTO_ICMPV6;
571 fl6.daddr = ipv6_hdr(skb)->saddr;
574 fl6.flowi6_oif = skb->dev->ifindex;
575 fl6.fl6_icmp_type = ICMPV6_ECHO_REPLY;
576 fl6.flowi6_mark = mark;
577 security_skb_classify_flow(skb, flowi6_to_flowi(&fl6));
579 sk = icmpv6_xmit_lock(net);
585 if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr))
586 fl6.flowi6_oif = np->mcast_oif;
587 else if (!fl6.flowi6_oif)
588 fl6.flowi6_oif = np->ucast_oif;
590 err = ip6_dst_lookup(sk, &dst, &fl6);
593 dst = xfrm_lookup(net, dst, flowi6_to_flowi(&fl6), sk, 0);
597 hlimit = ip6_sk_dst_hoplimit(np, &fl6, dst);
599 idev = __in6_dev_get(skb->dev);
603 msg.type = ICMPV6_ECHO_REPLY;
605 tclass = ipv6_get_dsfield(ipv6_hdr(skb));
606 err = ip6_append_data(sk, icmpv6_getfrag, &msg, skb->len + sizeof(struct icmp6hdr),
607 sizeof(struct icmp6hdr), hlimit, tclass, NULL, &fl6,
608 (struct rt6_info *)dst, MSG_DONTWAIT,
612 ICMP6_INC_STATS_BH(net, idev, ICMP6_MIB_OUTERRORS);
613 ip6_flush_pending_frames(sk);
615 err = icmpv6_push_pending_frames(sk, &fl6, &tmp_hdr,
616 skb->len + sizeof(struct icmp6hdr));
620 icmpv6_xmit_unlock(sk);
623 void icmpv6_notify(struct sk_buff *skb, u8 type, u8 code, __be32 info)
625 const struct inet6_protocol *ipprot;
629 struct net *net = dev_net(skb->dev);
631 if (!pskb_may_pull(skb, sizeof(struct ipv6hdr)))
634 nexthdr = ((struct ipv6hdr *)skb->data)->nexthdr;
635 if (ipv6_ext_hdr(nexthdr)) {
636 /* now skip over extension headers */
637 inner_offset = ipv6_skip_exthdr(skb, sizeof(struct ipv6hdr),
638 &nexthdr, &frag_off);
642 inner_offset = sizeof(struct ipv6hdr);
645 /* Checkin header including 8 bytes of inner protocol header. */
646 if (!pskb_may_pull(skb, inner_offset+8))
649 /* BUGGG_FUTURE: we should try to parse exthdrs in this packet.
650 Without this we will not able f.e. to make source routed
652 Corresponding argument (opt) to notifiers is already added.
656 ipprot = rcu_dereference(inet6_protos[nexthdr]);
657 if (ipprot && ipprot->err_handler)
658 ipprot->err_handler(skb, NULL, type, code, inner_offset, info);
660 raw6_icmp_error(skb, nexthdr, type, code, inner_offset, info);
664 ICMP6_INC_STATS_BH(net, __in6_dev_get(skb->dev), ICMP6_MIB_INERRORS);
668 * Handle icmp messages
671 static int icmpv6_rcv(struct sk_buff *skb)
673 struct net_device *dev = skb->dev;
674 struct inet6_dev *idev = __in6_dev_get(dev);
675 const struct in6_addr *saddr, *daddr;
676 struct icmp6hdr *hdr;
679 if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) {
680 struct sec_path *sp = skb_sec_path(skb);
683 if (!(sp && sp->xvec[sp->len - 1]->props.flags &
687 if (!pskb_may_pull(skb, sizeof(*hdr) + sizeof(struct ipv6hdr)))
690 nh = skb_network_offset(skb);
691 skb_set_network_header(skb, sizeof(*hdr));
693 if (!xfrm6_policy_check_reverse(NULL, XFRM_POLICY_IN, skb))
696 skb_set_network_header(skb, nh);
699 ICMP6_INC_STATS_BH(dev_net(dev), idev, ICMP6_MIB_INMSGS);
701 saddr = &ipv6_hdr(skb)->saddr;
702 daddr = &ipv6_hdr(skb)->daddr;
704 if (skb_checksum_validate(skb, IPPROTO_ICMPV6, ip6_compute_pseudo)) {
705 LIMIT_NETDEBUG(KERN_DEBUG
706 "ICMPv6 checksum failed [%pI6c > %pI6c]\n",
711 if (!pskb_pull(skb, sizeof(*hdr)))
714 hdr = icmp6_hdr(skb);
716 type = hdr->icmp6_type;
718 ICMP6MSGIN_INC_STATS_BH(dev_net(dev), idev, type);
721 case ICMPV6_ECHO_REQUEST:
722 icmpv6_echo_reply(skb);
725 case ICMPV6_ECHO_REPLY:
729 case ICMPV6_PKT_TOOBIG:
730 /* BUGGG_FUTURE: if packet contains rthdr, we cannot update
731 standard destination cache. Seems, only "advanced"
732 destination cache will allow to solve this problem
735 if (!pskb_may_pull(skb, sizeof(struct ipv6hdr)))
737 hdr = icmp6_hdr(skb);
740 * Drop through to notify
743 case ICMPV6_DEST_UNREACH:
744 case ICMPV6_TIME_EXCEED:
745 case ICMPV6_PARAMPROB:
746 icmpv6_notify(skb, type, hdr->icmp6_code, hdr->icmp6_mtu);
749 case NDISC_ROUTER_SOLICITATION:
750 case NDISC_ROUTER_ADVERTISEMENT:
751 case NDISC_NEIGHBOUR_SOLICITATION:
752 case NDISC_NEIGHBOUR_ADVERTISEMENT:
757 case ICMPV6_MGM_QUERY:
758 igmp6_event_query(skb);
761 case ICMPV6_MGM_REPORT:
762 igmp6_event_report(skb);
765 case ICMPV6_MGM_REDUCTION:
766 case ICMPV6_NI_QUERY:
767 case ICMPV6_NI_REPLY:
768 case ICMPV6_MLD2_REPORT:
769 case ICMPV6_DHAAD_REQUEST:
770 case ICMPV6_DHAAD_REPLY:
771 case ICMPV6_MOBILE_PREFIX_SOL:
772 case ICMPV6_MOBILE_PREFIX_ADV:
776 LIMIT_NETDEBUG(KERN_DEBUG "icmpv6: msg of unknown type\n");
779 if (type & ICMPV6_INFOMSG_MASK)
783 * error of unknown type.
784 * must pass to upper level
787 icmpv6_notify(skb, type, hdr->icmp6_code, hdr->icmp6_mtu);
794 ICMP6_INC_STATS_BH(dev_net(dev), idev, ICMP6_MIB_CSUMERRORS);
796 ICMP6_INC_STATS_BH(dev_net(dev), idev, ICMP6_MIB_INERRORS);
802 void icmpv6_flow_init(struct sock *sk, struct flowi6 *fl6,
804 const struct in6_addr *saddr,
805 const struct in6_addr *daddr,
808 memset(fl6, 0, sizeof(*fl6));
811 fl6->flowi6_proto = IPPROTO_ICMPV6;
812 fl6->fl6_icmp_type = type;
813 fl6->fl6_icmp_code = 0;
814 fl6->flowi6_oif = oif;
815 security_sk_classify_flow(sk, flowi6_to_flowi(fl6));
819 * Special lock-class for __icmpv6_sk:
821 static struct lock_class_key icmpv6_socket_sk_dst_lock_key;
823 static int __net_init icmpv6_sk_init(struct net *net)
829 kzalloc(nr_cpu_ids * sizeof(struct sock *), GFP_KERNEL);
830 if (net->ipv6.icmp_sk == NULL)
833 for_each_possible_cpu(i) {
834 err = inet_ctl_sock_create(&sk, PF_INET6,
835 SOCK_RAW, IPPROTO_ICMPV6, net);
837 pr_err("Failed to initialize the ICMP6 control socket (err %d)\n",
842 net->ipv6.icmp_sk[i] = sk;
845 * Split off their lock-class, because sk->sk_dst_lock
846 * gets used from softirqs, which is safe for
847 * __icmpv6_sk (because those never get directly used
848 * via userspace syscalls), but unsafe for normal sockets.
850 lockdep_set_class(&sk->sk_dst_lock,
851 &icmpv6_socket_sk_dst_lock_key);
853 /* Enough space for 2 64K ICMP packets, including
854 * sk_buff struct overhead.
856 sk->sk_sndbuf = 2 * SKB_TRUESIZE(64 * 1024);
861 for (j = 0; j < i; j++)
862 inet_ctl_sock_destroy(net->ipv6.icmp_sk[j]);
863 kfree(net->ipv6.icmp_sk);
867 static void __net_exit icmpv6_sk_exit(struct net *net)
871 for_each_possible_cpu(i) {
872 inet_ctl_sock_destroy(net->ipv6.icmp_sk[i]);
874 kfree(net->ipv6.icmp_sk);
877 static struct pernet_operations icmpv6_sk_ops = {
878 .init = icmpv6_sk_init,
879 .exit = icmpv6_sk_exit,
882 int __init icmpv6_init(void)
886 err = register_pernet_subsys(&icmpv6_sk_ops);
891 if (inet6_add_protocol(&icmpv6_protocol, IPPROTO_ICMPV6) < 0)
894 err = inet6_register_icmp_sender(icmp6_send);
900 inet6_del_protocol(&icmpv6_protocol, IPPROTO_ICMPV6);
902 pr_err("Failed to register ICMP6 protocol\n");
903 unregister_pernet_subsys(&icmpv6_sk_ops);
907 void icmpv6_cleanup(void)
909 inet6_unregister_icmp_sender(icmp6_send);
910 unregister_pernet_subsys(&icmpv6_sk_ops);
911 inet6_del_protocol(&icmpv6_protocol, IPPROTO_ICMPV6);
915 static const struct icmp6_err {
923 { /* ADM_PROHIBITED */
927 { /* Was NOT_NEIGHBOUR, now reserved */
949 int icmpv6_err_convert(u8 type, u8 code, int *err)
956 case ICMPV6_DEST_UNREACH:
958 if (code < ARRAY_SIZE(tab_unreach)) {
959 *err = tab_unreach[code].err;
960 fatal = tab_unreach[code].fatal;
964 case ICMPV6_PKT_TOOBIG:
968 case ICMPV6_PARAMPROB:
973 case ICMPV6_TIME_EXCEED:
980 EXPORT_SYMBOL(icmpv6_err_convert);
983 static struct ctl_table ipv6_icmp_table_template[] = {
985 .procname = "ratelimit",
986 .data = &init_net.ipv6.sysctl.icmpv6_time,
987 .maxlen = sizeof(int),
989 .proc_handler = proc_dointvec_ms_jiffies,
994 struct ctl_table * __net_init ipv6_icmp_sysctl_init(struct net *net)
996 struct ctl_table *table;
998 table = kmemdup(ipv6_icmp_table_template,
999 sizeof(ipv6_icmp_table_template),
1003 table[0].data = &net->ipv6.sysctl.icmpv6_time;