From 2d7a3b276be2d032a6c1a48ced87a474327ee3d3 Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Sat, 18 Jun 2016 21:52:04 -0700 Subject: ipv6: translate ICMP_TIME_EXCEEDED to ICMPV6_TIME_EXCEED For better traceroute/mtr support for SIT and GRE tunnels, we translate IPV4 ICMP ICMP_TIME_EXCEEDED to ICMPV6_TIME_EXCEED We also have to translate the IPv4 source IP address of ICMP message to IPv6 v4mapped. Signed-off-by: Eric Dumazet Signed-off-by: David S. Miller --- net/ipv6/icmp.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) (limited to 'net/ipv6/icmp.c') diff --git a/net/ipv6/icmp.c b/net/ipv6/icmp.c index 07bc63c23712..867aebc34248 100644 --- a/net/ipv6/icmp.c +++ b/net/ipv6/icmp.c @@ -564,8 +564,9 @@ void icmpv6_param_prob(struct sk_buff *skb, u8 code, int pos) * Either an IPv4 header for SIT encap * an IPv4 header + GRE header for GRE encap */ -int ip6_err_gen_icmpv6_unreach(struct sk_buff *skb, int nhs) +int ip6_err_gen_icmpv6_unreach(struct sk_buff *skb, int nhs, int type) { + struct in6_addr temp_saddr; struct rt6_info *rt; struct sk_buff *skb2; @@ -586,8 +587,13 @@ int ip6_err_gen_icmpv6_unreach(struct sk_buff *skb, int nhs) if (rt && rt->dst.dev) skb2->dev = rt->dst.dev; - icmpv6_send(skb2, ICMPV6_DEST_UNREACH, ICMPV6_ADDR_UNREACH, 0); - + ipv6_addr_set_v4mapped(ip_hdr(skb)->saddr, &temp_saddr); + if (type == ICMP_TIME_EXCEEDED) + icmp6_send(skb2, ICMPV6_TIME_EXCEED, ICMPV6_EXC_HOPLIMIT, + 0, &temp_saddr); + else + icmp6_send(skb2, ICMPV6_DEST_UNREACH, ICMPV6_ADDR_UNREACH, + 0, &temp_saddr); if (rt) ip6_rt_put(rt); -- cgit v1.2.3