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| author | Hangbin Liu <liuhangbin@gmail.com> | 2018-08-31 16:52:01 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-09-03 19:04:12 -0700 |
| commit | 36feaac35405e932ad9c321d7a2db8a7e4a4d7ca (patch) | |
| tree | d42564578858e46effaef8f971580d6ed54182c3 | |
| parent | 59a03fea131d671a57b8ed3dc446264c61d4b75f (diff) | |
| download | linux-36feaac35405e932ad9c321d7a2db8a7e4a4d7ca.tar.bz2 | |
ip6_tunnel: respect ttl inherit for ip6tnl
man ip-tunnel ttl section says:
0 is a special value meaning that packets inherit the TTL value.
IPv4 tunnel respect this in ip_tunnel_xmit(), but IPv6 tunnel has not
implement it yet. To make IPv6 behave consistently with IP tunnel,
add ipv6 tunnel inherit support.
Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | net/ipv6/ip6_tunnel.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c index 5df2a58d945c..419960b0ba16 100644 --- a/net/ipv6/ip6_tunnel.c +++ b/net/ipv6/ip6_tunnel.c @@ -1188,7 +1188,15 @@ route_lookup: init_tel_txopt(&opt, encap_limit); ipv6_push_frag_opts(skb, &opt.ops, &proto); } - hop_limit = hop_limit ? : ip6_dst_hoplimit(dst); + + if (hop_limit == 0) { + if (skb->protocol == htons(ETH_P_IP)) + hop_limit = ip_hdr(skb)->ttl; + else if (skb->protocol == htons(ETH_P_IPV6)) + hop_limit = ipv6_hdr(skb)->hop_limit; + else + hop_limit = ip6_dst_hoplimit(dst); + } /* Calculate max headroom for all the headers and adjust * needed_headroom if necessary. |