Why we need to read() before write() in TCP server program?

Posted by Naga on Stack Overflow See other posts from Stack Overflow or by Naga
Published on 2010-03-20T18:48:25Z Indexed on 2010/03/20 18:51 UTC
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tcplistener

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tcpip

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tcp

Hi,

As per my understanding a simple TCP server will be coded as follows.

socket() - bind() - listen() - accept() - read() - write()

The clients will be written as follows.

socket() - bind()(Optional) - connect() - write() - read()

Please note the order difference in read() and write() calls between client and server program.

Is it a requirement to always read() before write() in a server program and if, then why?

Thanks, Naga

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