IRC get/send messages help

**RedZone** · 07-21-2006

Basically, I've decided to mess around with sockets and create a telnet style IRC client. However, I am having a problem with the program getting the chat from the server channel and simultaneously letting me enter chat to be sent. I've tried a few various ways on how to do this but they all either ended up getting the buffer and not letting me chat or letting me chat and not getting the buffer. The way that I am doing it so far is

Code:

	while(true)
	{
		while((recv(Socket, buffer, strlen(buffer), 0) != 0) || 
		      (recv(Socket, buffer, strlen(buffer), 0) != -1))
		{
		cout<<buffer;
		break;
		}
		memset(buffer, 0, strlen(buffer));
		cin>>cintext;
		strcpy(texttosend, "PRIVMSG #blahhh :");
		strcat(texttosend, cintext);
		strcat(texttosend, "\r\n");
		send(Socket, texttosend, strlen(texttosend), 0);
		memset(cintext, 0, 255); memset(texttosend, 0, 255);
	}

but it's not really letting me enter text/read simultaneously. I can't really logically think of how this would be implemented after trying tons of different approaches, if someone can help me out of this it would be greatly appreciated. Thanks.

**Salem** · 07-22-2006

> recv(Socket, buffer, strlen(buffer), 0)
If you've cleared the buffer before, then strlen is going to return 0.
Use sizeof if your buffer is an array (not a pointer).

Eg.

Code:

while ( (n=recv(Socket, buffer, sizeof(buffer), 0)) > 0 ) {
  // Note that recv DOESN'T append a \0, so use 'n' to determine
  // what to do
}
if ( n == 0 ) {
  // closed
}
if ( n == -1 ) {
  // error
}

**RedZone** · 07-22-2006

Thanks for the help, fixed everything and it works just as I wanted it to.

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