Programming 2D Games

38312.9. Closing a Socket

ret = recvfrom(sock, data, readSize, 0, (SOCKADDR *)&remoteAddr,

&remoteAddrSize);

if (ret == SOCKET_ERROR) {

status = WSAGetLastError();

if ( status != WSAEWOULDBLOCK) // Don't report WOULDBLOCK

// error

return ((status << 16) + NET_ERROR);

ret = 0; // Clear SOCKET_ERROR

// If TCP connection did graceful close

} else if(ret == 0 && type == CONNECTED_TCP)

// Return Remote Disconnect error

return ((REMOTE_DISCONNECT << 16) + NET_ERROR);

if (ret)

// IP of sender

strncpy_s(senderIP, IP_SIZE, inet_ntoa(remoteAddr.sin_addr),

IP_SIZE);

size = ret; // Number of bytes read, may be 0

}

return NET_OK;

}

Listing 12.6(e). e ...