General sockets question

[LwSiX]

Hi there,

In my game i have some basic network code with sockets, but i have come across a small issue. My understanding of how a program retreives data from a socket is that it will simply sit on a function such as this:

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//get a message sent to the socket
bytes = recv(sck_HL,buffer,1023,0);

until data is received, I have it check immediately after this function by:

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if (bytes == SOCKET_ERROR)
{
	printf("ERROR:%d\n",WSAGetLastError());
	printf("Connection lost, reconnecting in 5 seconds..\n");
	Sleep(5000);
	Connect();
}

but if the socket isn't explicitly closed from the other end, how do we detect when the socket is disconnected? It just sits...infinitely waiting for data that is never going to arrive?

[Warchief]

The recv() function receives a message from a socket. The recv() call can be used on a connection mode socket or a bound, connectionless socket. If no messages are available at the socket, the recv() call waits for a message to arrive unless the socket is nonblocking. If a socket is nonblocking, -1 is returned and the external variable errno is set to EWOULDBLOCK. select() can be used to wait for incoming messages.

Check your socket. Have you set the flags for non blocking?

[LwSiX]

Thanks! Guess i overlooked that part.