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authorEric Dumazet <edumazet@google.com>2016-06-19 07:52:05 +0300
committerDavid S. Miller <davem@davemloft.net>2016-06-19 08:11:39 +0300
commit9b8c6d7bf2e08a7d3eb6660a2bfaf29b8b49c329 (patch)
tree3e887221b1576e9fdcbada9b9fcb7ddb1e779ca8 /net/ipv4/ip_gre.c
parent2d7a3b276be2d032a6c1a48ced87a474327ee3d3 (diff)
downloadlinux-9b8c6d7bf2e08a7d3eb6660a2bfaf29b8b49c329.tar.xz
gre: better support for ICMP messages for gre+ipv6
ipgre_err() can call ip6_err_gen_icmpv6_unreach() for proper support of ipv4+gre+icmp+ipv6+... frames, used for example by traceroute/mtr. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/ip_gre.c')
-rw-r--r--net/ipv4/ip_gre.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c
index 0f8ca3fca00a..ab4cff8e563d 100644
--- a/net/ipv4/ip_gre.c
+++ b/net/ipv4/ip_gre.c
@@ -187,6 +187,12 @@ static void ipgre_err(struct sk_buff *skb, u32 info,
if (!t)
return;
+#if IS_ENABLED(CONFIG_IPV6)
+ if (tpi->proto == htons(ETH_P_IPV6) &&
+ !ip6_err_gen_icmpv6_unreach(skb, iph->ihl * 4 + tpi->hdr_len, type))
+ return;
+#endif
+
if (t->parms.iph.daddr == 0 ||
ipv4_is_multicast(t->parms.iph.daddr))
return;