Re: about Winsock send() and recv()

"Igor Tandetnik" <>
Tue, 12 Feb 2008 14:38:36 -0500
<OFOEd7abIHA.1188@TK2MSFTNGP04.phx.gbl> wrote:

I'm very new on C and Winsock programming (i did some VB with winsock
I've started with a little app. It works pretty well using an ECHO
server: i send a message, and i receive the same. Cool.
But, when i connect with a SMTP, POP or any other service, i receive a
first message, and then it hangs up.

My code:

/******* part: LOOP */
int con = connect(recvskt, (SOCKADDR*) &RetSocket,
if(con != SOCKET_ERROR){
if(recvm(recvskt) == 0){printf("Block.");}
}while(rcv_b != SOCKET_ERROR);

If the remote server closes connection, this will enter infinite loop
since recvm will always return 0 (SOCKET_ERROR is not zero).
With best wishes,
    Igor Tandetnik

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