/// <summary>
/// Called to bind to socket and start heartbeat thread.
/// The socket will be bound to listen on any network interface unless the <see cref="NetConfiguration.Address"/> explicitly specifies an interface.
/// </summary>
public void Start()
{
if (m_isBound)
{
return;
}
// TODO: this check should be done somewhere earlier, in uLink preferably.
if (m_config.StartPort > m_config.EndPort)
{
throw new NetException("The start port (" + m_config.StartPort + ") must be less or equal to the end port (" + m_config.EndPort + ")");
}
//by WuNan @2016/09/28 14:26:22
var bindIP = String.IsNullOrEmpty(m_config.AddressStr) ?
#if (UNITY_IOS || UNITY_TVOS) && !UNITY_EDITOR
(uLink.NetworkUtility.IsSupportIPv6() ? IPAddress.IPv6Any : IPAddress.Any) : NetUtility.Resolve(m_config.AddressStr);
#else
IPAddress.Any : NetUtility.Resolve(m_config.AddressStr);
#endif
Log.Debug(LogFlags.Socket, "Creating non-blocking UDP socket");
var sock = NetworkSocket.Create(m_config.SocketType);
Log.Debug(LogFlags.Socket, "Successfully created Socket");
for (int port = m_config.StartPort; port <= m_config.EndPort; port++)
{
try
{
sock.Bind(new NetworkEndPoint(bindIP, port));
m_isBound = true;
break;
}
catch (SocketException ex)
{
Log.Debug(LogFlags.Socket, "Failed to bind to specific port ", port, ": ", ex);
if (port == m_config.EndPort)
{
try
{
sock.Close(0);
}
catch
{
}
throw new NetException("Failed to bind to port range " + m_config.StartPort + "-" + m_config.EndPort, ex);
}
}
}
m_socket = sock;
LogWrite("Listening on " + m_socket.listenEndPoint);
if (m_config.ReceiveBufferSize != 0)
{
try
{
m_socket.receiveBufferSize = m_config.ReceiveBufferSize;
m_config.ReceiveBufferSize = m_socket.receiveBufferSize; // make sure we have the actual size
}
catch (Exception ex)
{
Log.Warning(LogFlags.Socket, "Unable to set socket ", SocketOptionName.ReceiveBuffer, " size to ", m_config.ReceiveBufferSize, ": ", ex);
}
}
else
{
try
{
m_config.ReceiveBufferSize = m_socket.receiveBufferSize;
Log.Debug(LogFlags.Socket, "Socket ", SocketOptionName.ReceiveBuffer, " is set to OS-specific default ", m_config.ReceiveBufferSize);
}
catch (Exception ex)
{
Log.Warning(LogFlags.Socket, "Unable to get socket ", SocketOptionName.ReceiveBuffer, ": ", ex);
}
}
if (m_config.SendBufferSize != 0)
{
try
{
m_socket.sendBufferSize = m_config.SendBufferSize;
m_config.SendBufferSize = m_socket.sendBufferSize; // make sure we have the actual size
}
catch (Exception ex)
{
Log.Warning(LogFlags.Socket, "Unable to set socket ", SocketOptionName.SendBuffer, " size to ", m_config.SendBufferSize, ": ", ex);
}
}
else
{
try
{
m_config.SendBufferSize = m_socket.sendBufferSize;
Log.Debug(LogFlags.Socket, "Socket ", SocketOptionName.SendBuffer, " is set to OS-specific default ", m_config.SendBufferSize);
}
catch (Exception ex)
{
Log.Warning(LogFlags.Socket, "Unable to get socket ", SocketOptionName.SendBuffer, ": ", ex);
}
}
m_receiveBuffer.EnsureBufferSizeInBytes(m_config.ReceiveBufferSize);
m_sendBuffer.EnsureBufferSizeInBytes(m_config.SendBufferSize);
// TODO: ugly hack to determine if server
if (this is NetServer)
{
m_socket.Listen(m_config.MaxConnections);
}
// display simulated networking conditions in debug log
if (m_simulatedLoss > 0.0f)
{
LogWrite("Simulating " + (m_simulatedLoss * 100.0f) + "% loss");
}
if (m_simulatedMinimumLatency > 0.0f || m_simulatedLatencyVariance > 0.0f)
{
LogWrite("Simulating " + ((int)(m_simulatedMinimumLatency * 1000.0f)) + " - " + NetTime.ToMillis(m_simulatedMinimumLatency + m_simulatedLatencyVariance) + " ms roundtrip latency");
}
if (m_simulatedDuplicateChance > 0.0f)
{
LogWrite("Simulating " + (m_simulatedDuplicateChance * 100.0f) + "% chance of packet duplication");
}
if (m_config.m_throttleBytesPerSecond > 0)
{
LogWrite("Throttling to " + m_config.m_throttleBytesPerSecond + " bytes per second");
}
m_isBound = true;
m_shutdownComplete = false;
m_statistics.Reset();
}