08-23-2008
It would be easier if you post the code you're using.
Generally servers simply send a packet every X minutes and wait for reply for Y minutes, if there is no reply they assume the connection is timed out. You can use poll(), alarm(), setitimer()...
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LEARN ABOUT CENTOS
tapset::tcp
tapset::tcp(3stap) tapset::tcp(3stap)
NAME
tapset::tcp - systemtap tcp tapset
DESCRIPTION
This family of probe points is used to probe events that occur in the TCP layer,
tcp.sendmsg
Sending a tcp message
See probe::tcp.sendmsg(3stap)
for details.
tcp.sendmsg.return
Sending TCP message is done
See probe::tcp.sendmsg.return(3stap)
for details.
tcp.recvmsg
Receiving TCP message
See probe::tcp.recvmsg(3stap)
for details.
tcp.recvmsg.return
Receiving TCP message complete
See probe::tcp.recvmsg.return(3stap)
for details.
tcp.disconnect
TCP socket disconnection
See probe::tcp.disconnect(3stap)
for details.
tcp.disconnect.return
TCP socket disconnection complete
See probe::tcp.disconnect.return(3stap)
for details.
tcp.setsockopt
Call to setsockopt()
See probe::tcp.setsockopt(3stap)
for details.
tcp.setsockopt.return
Return from setsockopt()
See probe::tcp.setsockopt.return(3stap)
for details.
tcp.receive
Called when a TCP packet is received
See probe::tcp.receive(3stap)
for details.
SEE ALSO
probe::tcp.sendmsg(3stap), probe::tcp.sendmsg.return(3stap), probe::tcp.recvmsg(3stap), probe::tcp.recvmsg.return(3stap),
probe::tcp.disconnect(3stap), probe::tcp.disconnect.return(3stap), probe::tcp.setsockopt(3stap), probe::tcp.setsockopt.return(3stap),
probe::tcp.receive(3stap), stap(1), stapprobes(3stap)
IBM
--- tapset::tcp(3stap)