icmp.c (9a64e8e0ace51b309fdcff4b4754b3649250382a) icmp.c (81aded24675ebda5de8a68843250ad15584ac38a)
1/*
2 * Internet Control Message Protocol (ICMPv6)
3 * Linux INET6 implementation
4 *
5 * Authors:
6 * Pedro Roque <roque@di.fc.ul.pt>
7 *
8 * Based on net/ipv4/icmp.c

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183 if (dst->error) {
184 IP6_INC_STATS(net, ip6_dst_idev(dst),
185 IPSTATS_MIB_OUTNOROUTES);
186 } else if (dst->dev && (dst->dev->flags&IFF_LOOPBACK)) {
187 res = true;
188 } else {
189 struct rt6_info *rt = (struct rt6_info *)dst;
190 int tmo = net->ipv6.sysctl.icmpv6_time;
1/*
2 * Internet Control Message Protocol (ICMPv6)
3 * Linux INET6 implementation
4 *
5 * Authors:
6 * Pedro Roque <roque@di.fc.ul.pt>
7 *
8 * Based on net/ipv4/icmp.c

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183 if (dst->error) {
184 IP6_INC_STATS(net, ip6_dst_idev(dst),
185 IPSTATS_MIB_OUTNOROUTES);
186 } else if (dst->dev && (dst->dev->flags&IFF_LOOPBACK)) {
187 res = true;
188 } else {
189 struct rt6_info *rt = (struct rt6_info *)dst;
190 int tmo = net->ipv6.sysctl.icmpv6_time;
191 struct inet_peer *peer;
191
192 /* Give more bandwidth to wider prefixes. */
193 if (rt->rt6i_dst.plen < 128)
194 tmo >>= ((128 - rt->rt6i_dst.plen)>>5);
195
192
193 /* Give more bandwidth to wider prefixes. */
194 if (rt->rt6i_dst.plen < 128)
195 tmo >>= ((128 - rt->rt6i_dst.plen)>>5);
196
196 if (!rt->rt6i_peer)
197 rt6_bind_peer(rt, 1);
198 res = inet_peer_xrlim_allow(rt->rt6i_peer, tmo);
197 peer = rt6_get_peer_create(rt);
198 res = inet_peer_xrlim_allow(peer, tmo);
199 }
200 dst_release(dst);
201 return res;
202}
203
204/*
205 * an inline helper for the "simple" if statement below
206 * checks if parameter problem report is caused by an

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644 * Handle icmp messages
645 */
646
647static int icmpv6_rcv(struct sk_buff *skb)
648{
649 struct net_device *dev = skb->dev;
650 struct inet6_dev *idev = __in6_dev_get(dev);
651 const struct in6_addr *saddr, *daddr;
199 }
200 dst_release(dst);
201 return res;
202}
203
204/*
205 * an inline helper for the "simple" if statement below
206 * checks if parameter problem report is caused by an

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644 * Handle icmp messages
645 */
646
647static int icmpv6_rcv(struct sk_buff *skb)
648{
649 struct net_device *dev = skb->dev;
650 struct inet6_dev *idev = __in6_dev_get(dev);
651 const struct in6_addr *saddr, *daddr;
652 const struct ipv6hdr *orig_hdr;
653 struct icmp6hdr *hdr;
654 u8 type;
655
656 if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) {
657 struct sec_path *sp = skb_sec_path(skb);
658 int nh;
659
660 if (!(sp && sp->xvec[sp->len - 1]->props.flags &
661 XFRM_STATE_ICMP))
662 goto drop_no_count;
663
652 struct icmp6hdr *hdr;
653 u8 type;
654
655 if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) {
656 struct sec_path *sp = skb_sec_path(skb);
657 int nh;
658
659 if (!(sp && sp->xvec[sp->len - 1]->props.flags &
660 XFRM_STATE_ICMP))
661 goto drop_no_count;
662
664 if (!pskb_may_pull(skb, sizeof(*hdr) + sizeof(*orig_hdr)))
663 if (!pskb_may_pull(skb, sizeof(*hdr) + sizeof(struct ipv6hdr)))
665 goto drop_no_count;
666
667 nh = skb_network_offset(skb);
668 skb_set_network_header(skb, sizeof(*hdr));
669
670 if (!xfrm6_policy_check_reverse(NULL, XFRM_POLICY_IN, skb))
671 goto drop_no_count;
672

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717 /* BUGGG_FUTURE: if packet contains rthdr, we cannot update
718 standard destination cache. Seems, only "advanced"
719 destination cache will allow to solve this problem
720 --ANK (980726)
721 */
722 if (!pskb_may_pull(skb, sizeof(struct ipv6hdr)))
723 goto discard_it;
724 hdr = icmp6_hdr(skb);
664 goto drop_no_count;
665
666 nh = skb_network_offset(skb);
667 skb_set_network_header(skb, sizeof(*hdr));
668
669 if (!xfrm6_policy_check_reverse(NULL, XFRM_POLICY_IN, skb))
670 goto drop_no_count;
671

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716 /* BUGGG_FUTURE: if packet contains rthdr, we cannot update
717 standard destination cache. Seems, only "advanced"
718 destination cache will allow to solve this problem
719 --ANK (980726)
720 */
721 if (!pskb_may_pull(skb, sizeof(struct ipv6hdr)))
722 goto discard_it;
723 hdr = icmp6_hdr(skb);
725 orig_hdr = (struct ipv6hdr *) (hdr + 1);
726 rt6_pmtu_discovery(&orig_hdr->daddr, &orig_hdr->saddr, dev,
727 ntohl(hdr->icmp6_mtu));
728
729 /*
730 * Drop through to notify
731 */
732
733 case ICMPV6_DEST_UNREACH:
734 case ICMPV6_TIME_EXCEED:
735 case ICMPV6_PARAMPROB:

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725 /*
726 * Drop through to notify
727 */
728
729 case ICMPV6_DEST_UNREACH:
730 case ICMPV6_TIME_EXCEED:
731 case ICMPV6_PARAMPROB:

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