Method SendReceive

src/network/network_stun.cpp:131–153

* Check whether we received/can send some data from/to the STUN server and * when that's the case handle it appropriately. */

 * when that's the case handle it appropriately.
 */
void ClientNetworkStunSocketHandler::SendReceive()
{
	if (this->sock == INVALID_SOCKET) return;

	/* We never attempt to receive anything on a STUN socket. After
	 * connecting a STUN connection, the local address will be reused to
	 * to establish the connection with the real server. If we would be to
	 * read this socket, some OSes get confused and deliver us packets meant
	 * for the real connection. It appears most OSes play best when we simply
	 * never attempt to read it to start with (and the packets will remain
	 * available on the other socket).
	 * Protocol-wise, the STUN server will never send any packet back anyway. */

	this->CanSendReceive();
	if (this->SendPackets() == SPS_ALL_SENT && !this->sent_result) {
		/* We delay giving the GC the result this long, as to make sure we
		 * have sent the STUN packet first. This means the GC is more likely
		 * to have the result ready by the time our StunResult() packet
		 * arrives. */
		this->sent_result = true;
		_network_coordinator_client.StunResult(this->token, this->family, true);
	}
}