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ICMP breaks TCP connection

To: netdev@xxxxxxxxxxx
Subject: ICMP breaks TCP connection
From: Mikulas Patocka <mikulas@xxxxxxxxxxxxxxxxxxxxxxxx>
Date: Sat, 24 Jul 2004 15:08:19 +0200 (CEST)
Sender: netdev-bounce@xxxxxxxxxxx
Hi

I found that Linux 2.2.16 and 2.4.25 break tcp connection (with no route
to host error) after first attempt when received ICMP packet with type 3
and code 1 (ICMP_UNREACH_HOST).

RFC1122, section 3.2.2.1 says, that the message MUST be interpreted as
hint, not proof of unreachable machine.

Mikulas

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