On Nov 10, 2005, at 9:43 PM, hari kumar wrote:
I have few doubts on Linux TCP socket.My doubt goes like
this..I have formed TCP Socket between two host. Now I want to know
the TCP flag and state details at socket level.I wanted to do some
encapsulation based upon the flag set. It would be great if anyone can
help me on this.
I am assuming you are programming TCP sockets. Uh, the socket level is a layer above the the TCP level. http://en.wikipedia.org/wiki/OSI_modelTCP is at layer 4 (Transport Layer). Sockets are at layer 5 (Session Layer).
If you want to use sockets, all the TCP stuff is abstracted away from your control. The sockets library contains the code to communicate to the TCP layer. This means your code is at the Presentation or Application layer. In order to communicate with the TCP layer you will need to skip the sockets libraries and speak directly to the TCP layer itself.
Now if my assumption is wrong, and you just want to watch the traffic flowing, you can use ethereal, tcpdump, etc. They all have fairly good documentation.
--lonnie
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