public bool Handle(byte[] firstPacket, int length, Socket socket)
{
if (length < 2 || firstPacket[0] != 5)
{
return false;
}
socket.SetSocketOption(SocketOptionLevel.Tcp, SocketOptionName.NoDelay, true);
Handler handler = new Handler();
handler.connection = socket;
Server server = _config.GetCurrentServer();
handler.encryptor = EncryptorFactory.GetEncryptor(server.method, server.password);
handler.server = server;
handler.Start(firstPacket, length);
return true;
}
public bool Handle(byte[] firstPacket, int length, Socket socket, object state)
{
if (socket.ProtocolType != ProtocolType.Tcp)
{
return false;
}
if (length < 2 || firstPacket[0] != 5)
{
return false;
}
socket.SetSocketOption(SocketOptionLevel.Tcp, SocketOptionName.NoDelay, true);
Handler handler = new Handler();
handler.connection = socket;
handler.controller = _controller;
handler.relay = this;
handler.Start(firstPacket, length);
IList<Handler> handlersToClose = new List<Handler>();
lock (this.Handlers)
{
this.Handlers.Add(handler);
Logging.Debug($"connections: {Handlers.Count}");
DateTime now = DateTime.Now;
if (now - _lastSweepTime > TimeSpan.FromSeconds(1))
{
_lastSweepTime = now;
foreach (Handler handler1 in this.Handlers)
{
if (now - handler1.lastActivity > TimeSpan.FromSeconds(900))
{
handlersToClose.Add(handler1);
}
}
}
}
foreach (Handler handler1 in handlersToClose)
{
Logging.Debug("Closing timed out connection");
handler1.Close();
}
return true;
}
public bool Handle(byte[] firstPacket, int length, Socket socket)
{
if (length < 2
|| (firstPacket[0] != 5 && firstPacket[0] != 4))
{
return false;
}
socket.SetSocketOption(SocketOptionLevel.Tcp, SocketOptionName.NoDelay, true);
Handler handler = new Handler();
//handler.config = _config;
handler.getCurrentServer = delegate (bool usingRandom, bool forceRandom) { return _config.GetCurrentServer(usingRandom, forceRandom); };
handler.connection = socket;
handler.reconnectTimesRemain = _config.reconnectTimes;
handler.server = _config.GetCurrentServer(true);
if (_config.socks5enable)
{
handler.socks5RemoteHost = _config.socks5Host;
handler.socks5RemotePort = _config.socks5Port;
handler.socks5RemoteUsername = _config.socks5User;
handler.socks5RemotePassword = _config.socks5Pass;
}
handler.obfs = ObfsFactory.GetObfs(handler.server.obfs);
handler.TTL = _config.TTL;
handler.autoSwitchOff = _config.autoban;
handler.Start(firstPacket, length);
return true;
}
public bool Handle(byte[] firstPacket, int length, Socket socket)
{
if (!Accept(firstPacket, length))
{
return false;
}
socket.SetSocketOption(SocketOptionLevel.Tcp, SocketOptionName.NoDelay, true);
Handler handler = new Handler();
handler.getCurrentServer = delegate (bool usingRandom, bool forceRandom) { return _config.GetCurrentServer(usingRandom, forceRandom); };
handler.connection = socket;
handler.reconnectTimesRemain = _config.reconnectTimes;
handler.forceRandom = _config.random;
handler.server = _config.GetCurrentServer(true);
if (_config.proxyEnable)
{
handler.proxyType = _config.proxyType;
handler.socks5RemoteHost = _config.proxyHost;
handler.socks5RemotePort = _config.proxyPort;
handler.socks5RemoteUsername = _config.proxyAuthUser;
handler.socks5RemotePassword = _config.proxyAuthPass;
}
handler.TTL = _config.TTL;
handler.autoSwitchOff = _config.autoban;
if (_config.authUser != null && _config.authUser.Length > 0)
{
handler.authConnection = AuthConnection;
handler.authUser = _config.authUser ?? "";
handler.authPass = _config.authPass ?? "";
}
if (!EncryptorLoaded)
{
try
{
IEncryptor encryptor = EncryptorFactory.GetEncryptor(handler.server.method, handler.server.password);
encryptor.Dispose();
}
catch
{
}
finally
{
EncryptorLoaded = true;
}
}
handler.Start(firstPacket, length);
return true;
}
public bool Handle(byte[] firstPacket, int length, Socket socket)
{
if (!Accept(firstPacket, length))
{
return false;
}
socket.SetSocketOption(SocketOptionLevel.Tcp, SocketOptionName.NoDelay, true);
Handler handler = new Handler();
handler.getCurrentServer = delegate (bool usingRandom, bool forceRandom) { return _config.GetCurrentServer(usingRandom, forceRandom); };
handler.connection = socket;
handler.reconnectTimesRemain = _config.reconnectTimes;
handler.server = _config.GetCurrentServer(true);
if (_config.socks5enable)
{
handler.socks5RemoteHost = _config.socks5Host;
handler.socks5RemotePort = _config.socks5Port;
handler.socks5RemoteUsername = _config.socks5User;
handler.socks5RemotePassword = _config.socks5Pass;
}
handler.TTL = _config.TTL;
handler.autoSwitchOff = _config.autoban;
if (_config.authUser != null && _config.authUser.Length > 0)
{
string authStr = _config.authUser + ":" + (_config.authPass ?? "");
handler.httpAuthString = System.Convert.ToBase64String(Encoding.UTF8.GetBytes(authStr));
}
if (!EncryptorLoaded)
{
try
{
IEncryptor encryptor = EncryptorFactory.GetEncryptor(handler.server.method, handler.server.password);
encryptor.Dispose();
}
catch (Exception)
{
}
finally
{
EncryptorLoaded = true;
}
}
handler.Start(firstPacket, length);
return true;
}
public bool Handle(byte[] firstPacket, int length, Socket socket, object state)
{
if (socket.ProtocolType != ProtocolType.Tcp)
{
return false;
}
if (length < 2 || firstPacket[0] != 5)
{
return false;
}
socket.SetSocketOption(SocketOptionLevel.Tcp, SocketOptionName.NoDelay, true);
Handler handler = new Handler();
handler.connection = socket;
handler.controller = _controller;
handler.Start(firstPacket, length);
return true;
}
public void AcceptCallback(IAsyncResult ar)
{
Socket listener = (Socket)ar.AsyncState;
try
{
Socket conn = listener.EndAccept(ar);
conn.SetSocketOption(SocketOptionLevel.Tcp, SocketOptionName.NoDelay, true);
Handler handler = new Handler();
handler.connection = conn;
handler.encryptor = EncryptorFactory.GetEncryptor(_server.method, _server.password);
handler.config = _server;
handler.Start();
}
catch
{
//Console.WriteLine(e.Message);
}
finally
{
try
{
listener.BeginAccept(
new AsyncCallback(AcceptCallback),
listener);
}
catch
{
//Console.WriteLine(e.Message);
}
}
}
public bool Handle(byte[] firstPacket, int length, Socket socket)
{
if (length < 2)
{
return false;
}
bool accept = false;
if (firstPacket[0] == 5 || firstPacket[0] == 4)
{
accept = true;
}
else if (length > 8
&& firstPacket[0] == 'C'
&& firstPacket[1] == 'O'
&& firstPacket[2] == 'N'
&& firstPacket[3] == 'N'
&& firstPacket[4] == 'E'
&& firstPacket[5] == 'C'
&& firstPacket[6] == 'T'
&& firstPacket[7] == ' ')
{
accept = true;
}
else if (_config.buildinHttpProxy)
{
if (length > 8
&& firstPacket[0] == 'G'
&& firstPacket[1] == 'E'
&& firstPacket[2] == 'T'
&& firstPacket[3] == ' '
&& firstPacket[4] == 'h'
&& firstPacket[5] == 't'
&& firstPacket[6] == 't'
&& firstPacket[7] == 'p'
&& firstPacket[8] == ':'
)
{
accept = true;
}
else if (length > 9
&& firstPacket[0] == 'P'
&& firstPacket[1] == 'O'
&& firstPacket[2] == 'S'
&& firstPacket[3] == 'T'
&& firstPacket[4] == ' '
&& firstPacket[5] == 'h'
&& firstPacket[6] == 't'
&& firstPacket[7] == 't'
&& firstPacket[8] == 'p'
&& firstPacket[9] == ':'
)
{
accept = true;
}
else if (length > 9
&& firstPacket[0] == 'H'
&& firstPacket[1] == 'E'
&& firstPacket[2] == 'A'
&& firstPacket[3] == 'D'
&& firstPacket[4] == ' '
&& firstPacket[5] == 'h'
&& firstPacket[6] == 't'
&& firstPacket[7] == 't'
&& firstPacket[8] == 'p'
&& firstPacket[9] == ':'
)
{
accept = true;
}
}
if (!accept)
{
return false;
}
socket.SetSocketOption(SocketOptionLevel.Tcp, SocketOptionName.NoDelay, true);
Handler handler = new Handler();
//handler.config = _config;
handler.getCurrentServer = delegate (bool usingRandom, bool forceRandom) { return _config.GetCurrentServer(usingRandom, forceRandom); };
handler.connection = socket;
handler.reconnectTimesRemain = _config.reconnectTimes;
handler.server = _config.GetCurrentServer(true);
if (_config.socks5enable)
{
handler.socks5RemoteHost = _config.socks5Host;
handler.socks5RemotePort = _config.socks5Port;
handler.socks5RemoteUsername = _config.socks5User;
handler.socks5RemotePassword = _config.socks5Pass;
}
handler.TTL = _config.TTL;
handler.autoSwitchOff = _config.autoban;
if (_config.authUser != null && _config.authUser.Length > 0)
{
string authStr = _config.authUser + ":" + (_config.authPass ?? "");
handler.httpAuthString = System.Convert.ToBase64String(Encoding.UTF8.GetBytes(authStr));
}
handler.Start(firstPacket, length);
return true;
}
private void Connect()
{
Handler.GetCurrentServer getCurrentServer = delegate(ServerSelectStrategy.FilterFunc filter, string targetURI, bool cfgRandom, bool usingRandom, bool forceRandom) { return(_config.GetCurrentServer(filter, targetURI, cfgRandom, usingRandom, forceRandom)); };
Handler.KeepCurrentServer keepCurrentServer = delegate(string targetURI, string id) { _config.KeepCurrentServer(targetURI, id); };
int local_port = ((IPEndPoint)_connection.LocalEndPoint).Port;
Handler handler = new Handler();
handler.getCurrentServer = getCurrentServer;
handler.keepCurrentServer = keepCurrentServer;
handler.connection = new ProxySocketTunLocal(_connection);
handler.connectionUDP = _connectionUDP;
handler.cfg.reconnectTimesRemain = _config.reconnectTimes;
handler.cfg.random = _config.random;
handler.cfg.forceRandom = _config.random;
handler.setServerTransferTotal(_transfer);
if (_config.proxyEnable)
{
handler.cfg.proxyType = _config.proxyType;
handler.cfg.socks5RemoteHost = _config.proxyHost;
handler.cfg.socks5RemotePort = _config.proxyPort;
handler.cfg.socks5RemoteUsername = _config.proxyAuthUser;
handler.cfg.socks5RemotePassword = _config.proxyAuthPass;
handler.cfg.proxyUserAgent = _config.proxyUserAgent;
}
handler.cfg.TTL = _config.TTL;
handler.cfg.connect_timeout = _config.connect_timeout;
handler.cfg.autoSwitchOff = _config.autoBan;
if (!string.IsNullOrEmpty(_config.dns_server))
{
handler.cfg.dns_servers = _config.dns_server;
}
if (_config.GetPortMapCache().ContainsKey(local_port))
{
PortMapConfigCache cfg = _config.GetPortMapCache()[local_port];
if (cfg.server == null || cfg.id == cfg.server.id)
{
if (cfg.server != null)
{
handler.select_server = delegate(Server server, Server selServer) { return(server.id == cfg.server.id); };
}
else if (!string.IsNullOrEmpty(cfg.id))
{
handler.select_server = delegate(Server server, Server selServer) { return(server.group == cfg.id); };
}
if (cfg.type == PortMapType.Forward) // tunnel
{
byte[] addr = System.Text.Encoding.UTF8.GetBytes(cfg.server_addr);
byte[] newFirstPacket = new byte[_firstPacketLength + addr.Length + 4];
newFirstPacket[0] = 3;
newFirstPacket[1] = (byte)addr.Length;
Array.Copy(addr, 0, newFirstPacket, 2, addr.Length);
newFirstPacket[addr.Length + 2] = (byte)(cfg.server_port / 256);
newFirstPacket[addr.Length + 3] = (byte)(cfg.server_port % 256);
Array.Copy(_firstPacket, 0, newFirstPacket, addr.Length + 4, _firstPacketLength);
_remoteHeaderSendBuffer = newFirstPacket;
handler.Start(_remoteHeaderSendBuffer, _remoteHeaderSendBuffer.Length, null);
}
else if (_connectionUDP == null && cfg.type == PortMapType.RuleProxy &&
(new Socks5Forwarder(_config, _IPRange)).Handle(_remoteHeaderSendBuffer, _remoteHeaderSendBuffer.Length, _connection, local_sendback_protocol))
{
}
else
{
handler.Start(_remoteHeaderSendBuffer, _remoteHeaderSendBuffer.Length, "socks5");
}
return;
}
}
else
{
if (_connectionUDP == null && new Socks5Forwarder(_config, _IPRange).Handle(_remoteHeaderSendBuffer, _remoteHeaderSendBuffer.Length, _connection, local_sendback_protocol))
{
}
else
{
handler.Start(_remoteHeaderSendBuffer, _remoteHeaderSendBuffer.Length, local_sendback_protocol);
}
return;
}
Close();
}
public bool Handle(byte[] firstPacket, int length, Socket socket, object state)
{
if (socket.ProtocolType != ProtocolType.Tcp)
{
return false;
}
/*
建立与 SOCKS5 服务器的TCP连接后,客户端需要先发送请求来协商版本及认证方式。
+----+----------+----------+
|VER | NMETHODS | METHODS |
+----+----------+----------+
| 1 | 1 | 1 to 255 |
+----+----------+----------+
VER 是 SOCKS 版本，这里应该是 0x05；
NMETHODS 是 METHODS 部分的长度；
METHODS 是客户端支持的认证方式列表，每个方法占1字节。当前的定义是：
0x00 不需要认证
0x01 GSSAPI
0x02 用户名、密码认证
0x03 - 0x7F 由IANA分配(保留)
0x80 - 0xFE 为私人方法保留
0xFF 无可接受的方法
*/
if (length < 2 || firstPacket[0] != 5)
{
return false;
}
socket.SetSocketOption(SocketOptionLevel.Tcp, SocketOptionName.NoDelay, true);
// 此处没有对Handler设置构造器, 分别对connection,controller,relay赋值, 可读性不如UDPRelay的处理
// :-1:
// 看了下python版本的代码，其对TcpRelayHandler也用了构造器，为什么这里没有？
// 作者：怪我咯？
Handler handler = new Handler();
handler.connection = socket;
handler.controller = _controller;
handler.relay = this;
handler.Start(firstPacket, length);
IList<Handler> handlersToClose = new List<Handler>(); // 用于缓存长时间不活动的tcp处理对象，并将其清理
lock (this.Handlers)
{
this.Handlers.Add(handler);
Logging.Debug($"connections: {Handlers.Count}");
DateTime now = DateTime.Now;
// 每超过1秒清理一下长时间不活动的tcp连接
if (now - _lastSweepTime > TimeSpan.FromSeconds(1))
{
_lastSweepTime = now;
foreach (Handler handler1 in this.Handlers)
{
if (now - handler1.lastActivity > TimeSpan.FromSeconds(900))
{
handlersToClose.Add(handler1);
}
}
}
}
foreach (Handler handler1 in handlersToClose)
{
Logging.Debug("Closing timed out connection");
handler1.Close();
}
return true;
}
