public static void SetStrategy(string newStrategy)
{
logger.Info("Change strategy to: " + newStrategy);
Config.Strategy = newStrategy;
SocksProxyConnection.SetStrategy(newStrategy);
}
public async Task StartListen(int port)
{
if (_listenSocket != null)
{
throw new Exception("Already started. Please stop it first.");
}
if (NetUtils.IsPortInUse(port))
{
throw new SocketException((int)SocketError.AddressAlreadyInUse);
}
ListenEp.Port = port;
try {
_listenSocket = new Socket(ListenEp.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
_listenSocket.Bind(ListenEp);
_listenSocket.Listen(100);
logger.Info("Start Proxy On " + ListenEp);
} catch (SocketException ex) {
logger.Error("Listen failed. " + ex.SocketErrorCode);
Stop();
throw;
}
try {
while (true)
{
Socket requestSocket =
await _listenSocket.AcceptTaskAsync().ConfigureAwait(false);
ProxyConnection newConn = new SocksProxyConnection(requestSocket);
//StartHandshake处理了所有的异常，不会有异常抛出。
//所以无限循环只能在AcceptTaskAsync失败（如Stop())时结束
await newConn.StartHandshake();
}
} catch (ObjectDisposedException) {
//// Stop() cause this exception, and this task finished.
//ignore
} catch (SocketException ex) {
logger.Error("Accept failed. " + ex.SocketErrorCode);
Stop();
throw;
} catch (Exception ex) {
logger.Error("Accept failed." + ex.TypeAndMessage());
Stop();
throw;
}
}
