TCP Connection Persistent State

Posted by TripShock on Stack Overflow See other posts from Stack Overflow or by TripShock
Published on 2009-11-27T00:56:40Z Indexed on 2010/04/14 9:03 UTC
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Is there any field/option/anything that I can put in a TCP packet (be it a syn or an ack or just plain data) that I can be sure will be returned by the other end intact?

For eg. I want to "tag" a particular connection (src, srcport, dst, dstport) with a number that I can always read from a packet belonging to that connection. That means I can identify the connection without using the 4-tuple (as given above).

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