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;
449 iif = l3mdev_master_ifindex(skb->dev);
452 * Must not send error if the source does not uniquely
453 * identify a single node (RFC2463 Section 2.4).
454 * We check unspecified / multicast addresses here,
455 * and anycast addresses will be checked later.
457 if ((addr_type == IPV6_ADDR_ANY) || (addr_type & IPV6_ADDR_MULTICAST)) {
458 net_dbg_ratelimited("icmp6_send: addr_any/mcast source [%pI6c > %pI6c]\n",
459 &hdr->saddr, &hdr->daddr);
464 * Never answer to a ICMP packet.
466 if (is_ineligible(skb)) {
467 net_dbg_ratelimited("icmp6_send: no reply to icmp error [%pI6c > %pI6c]\n",
468 &hdr->saddr, &hdr->daddr);
474 memset(&fl6, 0, sizeof(fl6));
475 fl6.flowi6_proto = IPPROTO_ICMPV6;
476 fl6.daddr = hdr->saddr;
479 fl6.flowi6_mark = mark;
480 fl6.flowi6_oif = iif;
481 fl6.fl6_icmp_type = type;
482 fl6.fl6_icmp_code = code;
483 security_skb_classify_flow(skb, flowi6_to_flowi(&fl6));
485 sk = icmpv6_xmit_lock(net);
491 if (!icmpv6_xrlim_allow(sk, type, &fl6))
494 tmp_hdr.icmp6_type = type;
495 tmp_hdr.icmp6_code = code;
496 tmp_hdr.icmp6_cksum = 0;
497 tmp_hdr.icmp6_pointer = htonl(info);
499 if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr))
500 fl6.flowi6_oif = np->mcast_oif;
501 else if (!fl6.flowi6_oif)
502 fl6.flowi6_oif = np->ucast_oif;
504 dst = icmpv6_route_lookup(net, skb, sk, &fl6);
508 hlimit = ip6_sk_dst_hoplimit(np, &fl6, dst);
511 msg.offset = skb_network_offset(skb);
514 len = skb->len - msg.offset;
515 len = min_t(unsigned int, len, IPV6_MIN_MTU - sizeof(struct ipv6hdr) - sizeof(struct icmp6hdr));
517 net_dbg_ratelimited("icmp: len problem [%pI6c > %pI6c]\n",
518 &hdr->saddr, &hdr->daddr);
519 goto out_dst_release;
523 idev = __in6_dev_get(skb->dev);
525 err = ip6_append_data(sk, icmpv6_getfrag, &msg,
526 len + sizeof(struct icmp6hdr),
527 sizeof(struct icmp6hdr), hlimit,
528 np->tclass, NULL, &fl6, (struct rt6_info *)dst,
529 MSG_DONTWAIT, np->dontfrag);
531 ICMP6_INC_STATS(net, idev, ICMP6_MIB_OUTERRORS);
532 ip6_flush_pending_frames(sk);
534 err = icmpv6_push_pending_frames(sk, &fl6, &tmp_hdr,
535 len + sizeof(struct icmp6hdr));
541 icmpv6_xmit_unlock(sk);
544 /* Slightly more convenient version of icmp6_send.
546 void icmpv6_param_prob(struct sk_buff *skb, u8 code, int pos)
548 icmp6_send(skb, ICMPV6_PARAMPROB, code, pos);
552 static void icmpv6_echo_reply(struct sk_buff *skb)
554 struct net *net = dev_net(skb->dev);
556 struct inet6_dev *idev;
557 struct ipv6_pinfo *np;
558 const struct in6_addr *saddr = NULL;
559 struct icmp6hdr *icmph = icmp6_hdr(skb);
560 struct icmp6hdr tmp_hdr;
562 struct icmpv6_msg msg;
563 struct dst_entry *dst;
567 u32 mark = IP6_REPLY_MARK(net, skb->mark);
569 saddr = &ipv6_hdr(skb)->daddr;
571 if (!ipv6_unicast_destination(skb) &&
572 !(net->ipv6.sysctl.anycast_src_echo_reply &&
573 ipv6_anycast_destination(skb_dst(skb), saddr)))
576 memcpy(&tmp_hdr, icmph, sizeof(tmp_hdr));
577 tmp_hdr.icmp6_type = ICMPV6_ECHO_REPLY;
579 memset(&fl6, 0, sizeof(fl6));
580 fl6.flowi6_proto = IPPROTO_ICMPV6;
581 fl6.daddr = ipv6_hdr(skb)->saddr;
584 fl6.flowi6_oif = l3mdev_fib_oif(skb->dev);
585 fl6.fl6_icmp_type = ICMPV6_ECHO_REPLY;
586 fl6.flowi6_mark = mark;
587 security_skb_classify_flow(skb, flowi6_to_flowi(&fl6));
589 sk = icmpv6_xmit_lock(net);
595 if (!fl6.flowi6_oif && ipv6_addr_is_multicast(&fl6.daddr))
596 fl6.flowi6_oif = np->mcast_oif;
597 else if (!fl6.flowi6_oif)
598 fl6.flowi6_oif = np->ucast_oif;
600 err = ip6_dst_lookup(net, sk, &dst, &fl6);
603 dst = xfrm_lookup(net, dst, flowi6_to_flowi(&fl6), sk, 0);
607 hlimit = ip6_sk_dst_hoplimit(np, &fl6, dst);
609 idev = __in6_dev_get(skb->dev);
613 msg.type = ICMPV6_ECHO_REPLY;
615 tclass = ipv6_get_dsfield(ipv6_hdr(skb));
616 err = ip6_append_data(sk, icmpv6_getfrag, &msg, skb->len + sizeof(struct icmp6hdr),
617 sizeof(struct icmp6hdr), hlimit, tclass, NULL, &fl6,
618 (struct rt6_info *)dst, MSG_DONTWAIT,
622 ICMP6_INC_STATS_BH(net, idev, ICMP6_MIB_OUTERRORS);
623 ip6_flush_pending_frames(sk);
625 err = icmpv6_push_pending_frames(sk, &fl6, &tmp_hdr,
626 skb->len + sizeof(struct icmp6hdr));
630 icmpv6_xmit_unlock(sk);
633 void icmpv6_notify(struct sk_buff *skb, u8 type, u8 code, __be32 info)
635 const struct inet6_protocol *ipprot;
639 struct net *net = dev_net(skb->dev);
641 if (!pskb_may_pull(skb, sizeof(struct ipv6hdr)))
644 nexthdr = ((struct ipv6hdr *)skb->data)->nexthdr;
645 if (ipv6_ext_hdr(nexthdr)) {
646 /* now skip over extension headers */
647 inner_offset = ipv6_skip_exthdr(skb, sizeof(struct ipv6hdr),
648 &nexthdr, &frag_off);
649 if (inner_offset < 0)
652 inner_offset = sizeof(struct ipv6hdr);
655 /* Checkin header including 8 bytes of inner protocol header. */
656 if (!pskb_may_pull(skb, inner_offset+8))
659 /* BUGGG_FUTURE: we should try to parse exthdrs in this packet.
660 Without this we will not able f.e. to make source routed
662 Corresponding argument (opt) to notifiers is already added.
666 ipprot = rcu_dereference(inet6_protos[nexthdr]);
667 if (ipprot && ipprot->err_handler)
668 ipprot->err_handler(skb, NULL, type, code, inner_offset, info);
670 raw6_icmp_error(skb, nexthdr, type, code, inner_offset, info);
674 ICMP6_INC_STATS_BH(net, __in6_dev_get(skb->dev), ICMP6_MIB_INERRORS);
678 * Handle icmp messages
681 static int icmpv6_rcv(struct sk_buff *skb)
683 struct net_device *dev = skb->dev;
684 struct inet6_dev *idev = __in6_dev_get(dev);
685 const struct in6_addr *saddr, *daddr;
686 struct icmp6hdr *hdr;
688 bool success = false;
690 if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) {
691 struct sec_path *sp = skb_sec_path(skb);
694 if (!(sp && sp->xvec[sp->len - 1]->props.flags &
698 if (!pskb_may_pull(skb, sizeof(*hdr) + sizeof(struct ipv6hdr)))
701 nh = skb_network_offset(skb);
702 skb_set_network_header(skb, sizeof(*hdr));
704 if (!xfrm6_policy_check_reverse(NULL, XFRM_POLICY_IN, skb))
707 skb_set_network_header(skb, nh);
710 ICMP6_INC_STATS_BH(dev_net(dev), idev, ICMP6_MIB_INMSGS);
712 saddr = &ipv6_hdr(skb)->saddr;
713 daddr = &ipv6_hdr(skb)->daddr;
715 if (skb_checksum_validate(skb, IPPROTO_ICMPV6, ip6_compute_pseudo)) {
716 net_dbg_ratelimited("ICMPv6 checksum failed [%pI6c > %pI6c]\n",
721 if (!pskb_pull(skb, sizeof(*hdr)))
724 hdr = icmp6_hdr(skb);
726 type = hdr->icmp6_type;
728 ICMP6MSGIN_INC_STATS_BH(dev_net(dev), idev, type);
731 case ICMPV6_ECHO_REQUEST:
732 icmpv6_echo_reply(skb);
735 case ICMPV6_ECHO_REPLY:
736 success = ping_rcv(skb);
739 case ICMPV6_PKT_TOOBIG:
740 /* BUGGG_FUTURE: if packet contains rthdr, we cannot update
741 standard destination cache. Seems, only "advanced"
742 destination cache will allow to solve this problem
745 if (!pskb_may_pull(skb, sizeof(struct ipv6hdr)))
747 hdr = icmp6_hdr(skb);
750 * Drop through to notify
753 case ICMPV6_DEST_UNREACH:
754 case ICMPV6_TIME_EXCEED:
755 case ICMPV6_PARAMPROB:
756 icmpv6_notify(skb, type, hdr->icmp6_code, hdr->icmp6_mtu);
759 case NDISC_ROUTER_SOLICITATION:
760 case NDISC_ROUTER_ADVERTISEMENT:
761 case NDISC_NEIGHBOUR_SOLICITATION:
762 case NDISC_NEIGHBOUR_ADVERTISEMENT:
767 case ICMPV6_MGM_QUERY:
768 igmp6_event_query(skb);
771 case ICMPV6_MGM_REPORT:
772 igmp6_event_report(skb);
775 case ICMPV6_MGM_REDUCTION:
776 case ICMPV6_NI_QUERY:
777 case ICMPV6_NI_REPLY:
778 case ICMPV6_MLD2_REPORT:
779 case ICMPV6_DHAAD_REQUEST:
780 case ICMPV6_DHAAD_REPLY:
781 case ICMPV6_MOBILE_PREFIX_SOL:
782 case ICMPV6_MOBILE_PREFIX_ADV:
787 if (type & ICMPV6_INFOMSG_MASK)
790 net_dbg_ratelimited("icmpv6: msg of unknown type [%pI6c > %pI6c]\n",
794 * error of unknown type.
795 * must pass to upper level
798 icmpv6_notify(skb, type, hdr->icmp6_code, hdr->icmp6_mtu);
801 /* until the v6 path can be better sorted assume failure and
802 * preserve the status quo behaviour for the rest of the paths to here
812 ICMP6_INC_STATS_BH(dev_net(dev), idev, ICMP6_MIB_CSUMERRORS);
814 ICMP6_INC_STATS_BH(dev_net(dev), idev, ICMP6_MIB_INERRORS);
820 void icmpv6_flow_init(struct sock *sk, struct flowi6 *fl6,
822 const struct in6_addr *saddr,
823 const struct in6_addr *daddr,
826 memset(fl6, 0, sizeof(*fl6));
829 fl6->flowi6_proto = IPPROTO_ICMPV6;
830 fl6->fl6_icmp_type = type;
831 fl6->fl6_icmp_code = 0;
832 fl6->flowi6_oif = oif;
833 security_sk_classify_flow(sk, flowi6_to_flowi(fl6));
836 static int __net_init icmpv6_sk_init(struct net *net)
842 kzalloc(nr_cpu_ids * sizeof(struct sock *), GFP_KERNEL);
843 if (!net->ipv6.icmp_sk)
846 for_each_possible_cpu(i) {
847 err = inet_ctl_sock_create(&sk, PF_INET6,
848 SOCK_RAW, IPPROTO_ICMPV6, net);
850 pr_err("Failed to initialize the ICMP6 control socket (err %d)\n",
855 net->ipv6.icmp_sk[i] = sk;
857 /* Enough space for 2 64K ICMP packets, including
858 * sk_buff struct overhead.
860 sk->sk_sndbuf = 2 * SKB_TRUESIZE(64 * 1024);
865 for (j = 0; j < i; j++)
866 inet_ctl_sock_destroy(net->ipv6.icmp_sk[j]);
867 kfree(net->ipv6.icmp_sk);
871 static void __net_exit icmpv6_sk_exit(struct net *net)
875 for_each_possible_cpu(i) {
876 inet_ctl_sock_destroy(net->ipv6.icmp_sk[i]);
878 kfree(net->ipv6.icmp_sk);
881 static struct pernet_operations icmpv6_sk_ops = {
882 .init = icmpv6_sk_init,
883 .exit = icmpv6_sk_exit,
886 int __init icmpv6_init(void)
890 err = register_pernet_subsys(&icmpv6_sk_ops);
895 if (inet6_add_protocol(&icmpv6_protocol, IPPROTO_ICMPV6) < 0)
898 err = inet6_register_icmp_sender(icmp6_send);
904 inet6_del_protocol(&icmpv6_protocol, IPPROTO_ICMPV6);
906 pr_err("Failed to register ICMP6 protocol\n");
907 unregister_pernet_subsys(&icmpv6_sk_ops);
911 void icmpv6_cleanup(void)
913 inet6_unregister_icmp_sender(icmp6_send);
914 unregister_pernet_subsys(&icmpv6_sk_ops);
915 inet6_del_protocol(&icmpv6_protocol, IPPROTO_ICMPV6);
919 static const struct icmp6_err {
927 { /* ADM_PROHIBITED */
931 { /* Was NOT_NEIGHBOUR, now reserved */
953 int icmpv6_err_convert(u8 type, u8 code, int *err)
960 case ICMPV6_DEST_UNREACH:
962 if (code < ARRAY_SIZE(tab_unreach)) {
963 *err = tab_unreach[code].err;
964 fatal = tab_unreach[code].fatal;
968 case ICMPV6_PKT_TOOBIG:
972 case ICMPV6_PARAMPROB:
977 case ICMPV6_TIME_EXCEED:
984 EXPORT_SYMBOL(icmpv6_err_convert);
987 static struct ctl_table ipv6_icmp_table_template[] = {
989 .procname = "ratelimit",
990 .data = &init_net.ipv6.sysctl.icmpv6_time,
991 .maxlen = sizeof(int),
993 .proc_handler = proc_dointvec_ms_jiffies,
998 struct ctl_table * __net_init ipv6_icmp_sysctl_init(struct net *net)
1000 struct ctl_table *table;
1002 table = kmemdup(ipv6_icmp_table_template,
1003 sizeof(ipv6_icmp_table_template),
1007 table[0].data = &net->ipv6.sysctl.icmpv6_time;