/// <summary>
/// Send server discovery request to a remote host, not necessarily on
/// the local network
/// </summary>
public void DiscoverKnownServer(string ipOrHostName, int serverPort)
{
IPAddress ip = NetUtil.Resolve(this.Log, ipOrHostName);
NetMessage msg = NetDiscovery.EncodeRequest(this);
SendSingleMessageAtOnce(msg, null, new IPEndPoint(ip, serverPort));
}
public void DiscoverLocalServers(int serverPort)
{
IPEndPoint broadcast = new IPEndPoint(IPAddress.Broadcast, serverPort);
NetMessage msg = NetDiscovery.EncodeRequest(this);
Log.Info("Broadcasting server discovery ping...");
// special send style; can't use simulated lag due to socket options
try
{
m_socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.Broadcast, true);
m_sendBuffer.ResetWritePointer();
msg.Encode(null, m_sendBuffer);
int bytesSent = m_socket.SendTo(m_sendBuffer.Data, 0, m_sendBuffer.LengthBytes, SocketFlags.None, broadcast);
Log.Verbose(string.Format(CultureInfo.InvariantCulture, "Sent {0} bytes to {1}", bytesSent, broadcast));
return;
}
catch (SocketException sex)
{
if (sex.SocketErrorCode == SocketError.ConnectionReset ||
sex.SocketErrorCode == SocketError.ConnectionRefused ||
sex.SocketErrorCode == SocketError.ConnectionAborted)
{
Log.Warning("Remote socket forcefully closed: " + sex.SocketErrorCode);
return;
}
Log.Warning("Execute SocketException: " + sex.SocketErrorCode);
return;
}
finally
{
m_socket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.Broadcast, false);
}
}