Re: Linux TCP/IP stack.

Alan Cox (alan@lxorguk.ukuu.org.uk)
Sun, 18 Jul 1999 16:45:51 +0100 (BST)

> I've had a think and a look at the RFC, and _if_ Linux is sending RSTs
> in response to T/TCP setup it appears to be a bug. I don't know if
> Linux actually does this though. Explanation follows.

It doesnt. We send an ack for the syn|ack only

> So Linux is wrong if it sends RSTs in response, and discarding T/TCP
> initial data is ok.

Sending T/TCP initial data is a protocol violation of 793 btw. As the T/TCP
RFC is an experimental RFC people who use it actually deserve what they
get for "undefined".

Linux however does try to be sensible.

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