How to get the flags in TCP header in application level?

[Robert Pang]

I want to get the TCP flags(such as FIN,ACK ,RST) which are in the TCP header in my applications via 'socket'method.
How can I do it?
Thank you

[Ron Kinner]

The following URL has code for a packet sniffer which looks at the flags. It should get you started.

http://westcose.nologin.org/code/ip_sniff.c.htm

Ron

[westcose]

Hello Robert Pang,
Sounds like you need a sniffer. If you are running X, I reccomend ethereal. It is a very good stable sniffer that will allow you to dissect and analyze the packet data. If you are not using X, then ip_sniff(mentioned above) or tcpdump will work fine.

-westcose