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authorGeorg Kohmann <geokohma@cisco.com>2018-08-02 13:56:58 +0200
committerDavid S. Miller <davem@davemloft.net>2018-08-05 17:12:44 -0700
commit5f379ef51bc967567bbddacdcdecb772d4d7c3b3 (patch)
treea54a4171f8e64f52d876e5a8a941e7d1e8b1cdc4 /net/tls
parent91305f2812624c0cf7ccbb44133b66d3b24676e4 (diff)
downloadlinux-5f379ef51bc967567bbddacdcdecb772d4d7c3b3.tar.bz2
ipv6: icmp: Updating pmtu for link local route
When a ICMPV6_PKT_TOOBIG is received from a link local address the pmtu will be updated on a route with an arbitrary interface index. Subsequent packets sent back to the same link local address may therefore end up not considering the updated pmtu. Current behavior breaks TAHI v6LC4.1.4 Reduce PMTU On-link. Referring to RFC 1981: Section 3: "Note that Path MTU Discovery must be performed even in cases where a node "thinks" a destination is attached to the same link as itself. In a situation such as when a neighboring router acts as proxy [ND] for some destination, the destination can to appear to be directly connected but is in fact more than one hop away." Using the interface index from the incoming ICMPV6_PKT_TOOBIG when updating the pmtu. Signed-off-by: Georg Kohmann <geokohma@cisco.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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