public void Start(Configuration config)
{
this._config = config;
this._shareOverLAN = config.shareOverLan;
if (CheckIfPortInUse(_config.localPort))
{
throw new Exception(I18N.GetString("Port already in use"));
}
try
{
// Create a TCP/IP socket.
_tcpSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
_udpSocket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
// 设置为接收所有的socket数据包
_tcpSocket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);
_udpSocket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);
IPEndPoint localEndPoint = null;
if (_shareOverLAN)
{
// 将绑定所有网络接口地址发出的请求，0.0.0.0
localEndPoint = new IPEndPoint(IPAddress.Any, _config.localPort);
}
else
{
// 将只绑定环回地址发出的请求 127.0.0.1
localEndPoint = new IPEndPoint(IPAddress.Loopback, _config.localPort);
}
// Bind the socket to the local endpoint and listen for incoming connections.
_tcpSocket.Bind(localEndPoint);
_udpSocket.Bind(localEndPoint);
_tcpSocket.Listen(1024);
// Start an asynchronous socket to listen for connections.
// 开始监听客户端socket请求
Console.WriteLine("Shadowsocks started");
_tcpSocket.BeginAccept(
new AsyncCallback(AcceptCallback),
_tcpSocket);
// 开始接收数据(udp socket不需要连接确认，直接接收数据）
UDPState udpState = new UDPState();
_udpSocket.BeginReceiveFrom(udpState.buffer, 0, udpState.buffer.Length, 0, ref udpState.remoteEndPoint, new AsyncCallback(RecvFromCallback), udpState);
}
catch (SocketException)
{
_tcpSocket.Close();
throw;
}
}
public void Start(Configuration config)
{
this._config = config;
this._shareOverLAN = config.shareOverLan;
if (CheckIfPortInUse(_config.localPort))
{
throw new Exception(I18N.GetString("Port {0} already in use", _config.localPort));
}
try
{
// Create a TCP/IP socket.
_tcpSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
_udpSocket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
_tcpSocket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);
_udpSocket.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);
IPEndPoint localEndPoint = null;
localEndPoint = _shareOverLAN
? new IPEndPoint(IPAddress.Any, _config.localPort)
: new IPEndPoint(IPAddress.Loopback, _config.localPort);
// Bind the socket to the local endpoint and listen for incoming connections.
_tcpSocket.Bind(localEndPoint);
_udpSocket.Bind(localEndPoint);
_tcpSocket.Listen(1024);
// Start an asynchronous socket to listen for connections.
Logging.Info($"Shadowsocks started ({UpdateChecker.Version})");
if (_config.isVerboseLogging)
{
Logging.Info(Encryption.EncryptorFactory.DumpRegisteredEncryptor());
}
_tcpSocket.BeginAccept(new AsyncCallback(AcceptCallback), _tcpSocket);
UDPState udpState = new UDPState();
udpState.socket = _udpSocket;
_udpSocket.BeginReceiveFrom(udpState.buffer, 0, udpState.buffer.Length, 0, ref udpState.remoteEndPoint, new AsyncCallback(RecvFromCallback), udpState);
}
catch (SocketException)
{
_tcpSocket.Close();
throw;
}
}
public void RecvFromCallback(IAsyncResult ar)
{
UDPState state = (UDPState)ar.AsyncState;
var socket = state.socket;
try
{
int bytesRead = socket.EndReceiveFrom(ar, ref state.remoteEndPoint);
foreach (IService service in _services)
{
if (service.Handle(state.buffer, bytesRead, socket, state))
{
break;
}
}
}
catch (ObjectDisposedException)
{
}
catch (Exception ex)
{
Logging.Debug(ex);
}
finally
{
try
{
socket.BeginReceiveFrom(state.buffer, 0, state.buffer.Length, 0, ref state.remoteEndPoint, new AsyncCallback(RecvFromCallback), state);
}
catch (ObjectDisposedException)
{
// do nothing
}
catch (Exception)
{
}
}
}