Messages in this thread | | | Subject | Re: T/TCP: Syn and RST Cookies | Date | Mon, 13 Apr 1998 00:56:27 +0300 (EEST) | From | Matti Aarnio <> |
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> Date: Sun, 12 Apr 1998 01:44:27 -0700 > From: "David S. Miller" <davem@dm.cobaltmicro.com> > Date: Sat, 11 Apr 1998 18:16:19 -0700 > From: Jim Dennis <jimd@starshine.org> .... > Is T/TCP (RFC1644) implemented in the Linux kernel? > > No, and until it is at least a real RFC standard, it won't be.
It is not implemented per se, but there exists support for receiving data (Push) with connection startup SYN packet.
This means that lattest 2.1.* kernels will do something sensible with incoming T/TCP packet. It does not mean there exists T/TCP support. Especially it does NOT mean that there exists user-space support for T/TCP per RFC 1644, or its FreeBSD implementation thereof.
Systems that don't support T/TCP are known to behave at least erratically. Some systems even appear to HANG for a while when they receive T/TCP SYN+Push. Most systems will just send back SYN+ACK, and wait for the third ACK to establish the connection.
/Matti Aarnio <matti.aarnio@tele.fi>
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