TCP bug?

Garrett Wollman wollman at
Fri Jun 19 21:43:27 UTC 2009

In article <4A3BF2DF.6080603 at>, Andre writes:

>2) in old T/TCP (RFC1644) which we supported in our TCP code the SYN/FIN
>    combination was a valid one, though not directly intended for SYN/ACK/FIN.

It still is valid, and should be possible to generate using sendmsg()
and MSG_EOF.  Nothing about this depends on T/TCP, which is solely
about reducing the three-way handshake to a two-way handshake.


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