linux socket TCP control

Hi,
In TCP protocol, it send the data to server and receive acknowledgement. if failed receive acknowledgement, then it will send again same data. it will try this for certain time. how can i control in socket created in linux? not seen any option in setsockopt function. is there any function exist to control this?



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Linux Learner

TCP is a connection-based protocol. it has built-in automatic retry when data isn't received. there is nothing you need to do. just send the data, and let TCP do its job.

The valid options for setsockopt() in Linux for TCP sockets are listed in man 7 tcp, man 7 ip, and man 7 socket.

Quote:

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Originally Posted by learner71

if failed receive acknowledgement, then it will send again same data. it will try this for certain time. how can i control in socket created in linux?

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Use

setsockopt(socketfd, SOL_SOCKET, SO_SNDTIMEO, (struct timeval *)&timeout, sizeof (struct timeval))

There is also the SO_RCVTIMEO option for limiting the time how long a read()/recv()/recvfrom() call waits for data to arrive, before giving up.