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Top Forums Programming problem receiving data from TCP socket Post 302264952 by otheus on Friday 5th of December 2008 07:59:44 AM
Old 12-05-2008
The server doesn't know how much data is being sent to it. Is the recv() call blocking or polling? If it's blocking, then you might be okay. If it's polling, you need to distinguish between "End of data" and "no more data YET".

Then there's
Code:
handleData(received->data,received->dataSize);

How does the received object (echoBuffer) know dataSize? Does the recv() call set that too? Or is it set to the maximum buffer size? In any case, it might be more (or less) than recvMsgSize, which would reflect the true number of bytes received.
 

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tcp-env(1)                                                    General Commands Manual                                                   tcp-env(1)

NAME
tcp-env - set up TCP-related environment variables SYNOPSIS
tcp-env [ -rR ] [ -ttimeout ] program [ arg ... ] DESCRIPTION
The input for tcp-env must be a TCP connection. tcp-env finds out information about that connection, puts the information into several environment variables as described in tcp-environ(5), and runs program with the given arguments. Usually tcp-env is run from inetd. It might instead be run from another server that already sets up the right environment variables; if PROTO is set to TCP when tcp-env is invoked, tcp-env assumes that all the other variables are set up properly, and it does not check whether the input is a TCP connection. OPTIONS
-r (Default.) Attempt to obtain TCPREMOTEINFO from the remote host. -R Do not attempt to obtain TCPREMOTEINFO from the remote host. -ttimeout Give up on the TCPREMOTEINFO connection attempt after timeout seconds. Default: 30. SEE ALSO
tcp-environ(5), inetd(8) tcp-env(1)
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