Quote:Original post by Evil Steve
The socket doesn't need to be bound, you can use a socket freshly created from socket().

Quote:Original post by Evil Steve
What would be better would be to have the clients also open a UDP connection to the server when the TCP connection is established. Then you can use the UDP socket to sendto() / recvfrom() the server

Quote:Original post by Mufflot
Ok, I'm not sure I understand completely. Do you mean that when the the TCP connection is established. The client should use connect(...), using the UDP socket descriptor as argument, to establish a UDP connection to the server?

Quote:Original post by Evil Steve
Yep - the client needs to make an outgoing connection for the firewall (router, etc) to allow traffic from the server to reach the client. That means making a connect() call to connect to the server and bind the socket, or to call sendto() with the server's address in the sockaddr, which will also bind the socket.

Quote:Original post by Evil Steve
Yep - the client needs to make an outgoing connection for the firewall (router, etc) to allow traffic from the server to reach the client. That means making a connect() call to connect to the server and bind the socket, or to call sendto() with the server's address in the sockaddr, which will also bind the socket.

Quote:Original post by Madhed
I think the general term for that is "NAT Punchthrough" You might find some information about that on google. There is also the possibility that both server and client are behind a Router in which case you'd have to introduce a third party to make connection possible.

udpSocket.SendTo(    udpSocket.GetDescriptor(),     PortUDP, // port the socket is bound to    clientIpAddress.c_str(),    "heja",    4);voidSocket::SendTo(    int socketDescriptor,     int port,     const char* ip,     const char* data,     unsigned int size){    ULONG internetAddress = inet_addr(ip);    sockaddr_in socketAddress;    GetSocketAddress(socketAddress, internetAddress, port);    sendto(        socketDescriptor,        data,        size,        0,        (SOCKADDR*)&socketAddress,        sizeof(socketAddress));}voidSocket::GetSocketAddress(sockaddr_in& out, ULONG internetAddress, int port) const{    out.sin_family = AF_INET;    out.sin_addr.S_un.S_addr = internetAddress;    out.sin_port = htons((u_short)port);}

if (udpSocket.ReceiveFrom(    udpSocket.GetDescriptor(),    PortUDP,    serverIpAddress.c_str(),    buffer)){    // packet recieved, get data from it, using GamePacket    int breakHere = 0;breakHere;}boolSocket::ReceiveFrom(int socketDescriptor, int /*port*/, const char* /*ip*/, std::string& out){    SOCKADDR from;    char inbuffer[256];    int len = sizeof(SOCKADDR);    memset(inbuffer, '\0', 256);    int numberOfBytes = recvfrom(        socketDescriptor,         inbuffer,         sizeof(inbuffer)-1,         0,         &from,         &len);    if (numberOfBytes <= 0)    {	return false;    }    out = inbuffer;    return true;}