async Task ProcessSocketAsync(Socket tcpSocket)
{
TryAgain:
string connmode = null;
if (Connector.UseRouterClientPort && DateTime.Now > _stopUseRouterClientPortUntil)
{
connmode = "RCP";
}
else if (Connector.UseUDPPunching && DateTime.Now > _stopUseRouterClientPortUntil)
{
connmode = "UDP";
}
else if (Connector.UseServerBandwidth)
{
connmode = "USB";
}
else
{
//TODO: try ..
if (Connector.UseUDPPunching)
{
connmode = "UDP";
}
else if (Connector.UseRouterClientPort)
{
connmode = "RCP";
}
else
{
throw new Exception("No connection mode.");
}
}
Task <KeyValuePair <string, UDPClientListener> > task2 = null;
if (connmode == "UDP")
{
//TODO: shall cache the UDPClientListener ...
task2 = Task.Run(GetUdpClientAsync);
}
Socket serverSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
serverSocket.InitTcp();
await serverSocket.ConnectAsync(Connector.ServerHost, 6022);
string connArgument = null;
UDPClientListener udp = null;
if (task2 != null)
{
try
{
var kvp = await task2;
connArgument = kvp.Key;
udp = kvp.Value;
}
catch (Exception x)
{
OnError(x);
LogMessage("UDP Failed , switch ...");
if (Connector.UseServerBandwidth)
{
connmode = "USB";
}
else
{
throw new Exception(x.Message, x);
}
}
}
bool supportEncrypt = Connector.UseEncrypt;
byte[] clientKeyIV;
CommandMessage connmsg = new CommandMessage();
connmsg.Name = "ConnectorConnect";
List <string> arglist = new List <string>();
arglist.Add(this.Connector.License.Key);
arglist.Add(this.Connector.ServerPort.ToString());
byte[] encryptedKeyIV, sourceHash;
Connector.License.GenerateSecureKeyAndHash(out clientKeyIV, out encryptedKeyIV, out sourceHash);
arglist.Add(Convert.ToBase64String(encryptedKeyIV));
arglist.Add(Convert.ToBase64String(sourceHash));
arglist.Add(supportEncrypt ? "1" : "0");
arglist.Add(connmode);
arglist.Add(connArgument);
connmsg.Args = arglist.ToArray();
await serverSocket.SendAsync(connmsg.Pack(), SocketFlags.None);
connmsg = await CommandMessage.ReadFromSocketAsync(serverSocket);
if (connmsg == null)
{
LogMessage("Warning:ConnectorWorker : remote closed connection.");
return;
}
//LogMessage("Warning:connmsg : " + connmsg);
if (connmsg.Name != "ConnectOK")
{
return;
}
//TODO: add to session list
if (supportEncrypt && connmsg.Args[1] == "0")
{
supportEncrypt = false; LogMessage("Warning:server don't support encryption : " + Connector.ServerHost);
}
Stream _sread, _swrite;
if (connmode == "RCP")
{
serverSocket.CloseSocket();
string ip = connmsg.Args[2];
int port = int.Parse(connmsg.Args[3]);
if (port < 1)
{
LogMessage("Error:Invalid configuration , remote-client-side don't provide RouterClientPort , stop use RCP for 1min");
_stopUseRouterClientPortUntil = DateTime.Now.AddSeconds(60);
goto TryAgain; //TODO: reuse the serverSocket and switch to another mode
}
LogMessage("Warning:" + tcpSocket.LocalEndPoint + " forward to " + ip + ":" + port);
await tcpSocket.ForwardToAndWorkAsync(ip, port);
return;
}
if (connmode == "UDP")
{
LogMessage("MY UDP..." + connArgument + " REMOTE..." + connmsg.Args[2]);
string mynat = connArgument;
string[] pair = connmsg.Args[2].Split(':');
serverSocket.CloseSocket();
try
{
UDPClientStream stream = await UDPClientStream.ConnectAsync(udp, pair[0], int.Parse(pair[1]), TimeSpan.FromSeconds(6));
_sread = stream;
_swrite = stream;
LogMessage("UDP Connected #" + stream.SessionId + " " + connArgument + " .. " + connmsg.Args[2]);
}
catch (Exception x)
{
LogMessage("UDP ERROR " + connArgument + " .. " + connmsg.Args[2] + " " + x.Message);
throw;
}
}
else
{
if (supportEncrypt)
{
Connector.License.OverrideStream(serverSocket.CreateStream(), clientKeyIV, out _sread, out _swrite);
}
else
{
_sread = _swrite = serverSocket.CreateStream();
}
}
TcpMapConnectorSession session = new TcpMapConnectorSession(new SimpleSocketStream(tcpSocket));
await session.DirectWorkAsync(_sread, _swrite);
}
async Task WorkAsync()
{
IsConnected = false;
LogMessage("ClientWorker WorkAsync start");
int connectedTimes = 0;
try
{
int againTimeout = 125;
StartAgain:
_socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
_socket.InitTcp();
_cts_connect = new CancellationTokenSource();
try
{
await _socket.ConnectAsync(Client.ServerHost, 6022);
LogMessage("connected to 6022");
}
catch (Exception x)
{
OnError(x);
_socket.CloseSocket();
_socket = null;
_cts_connect = new CancellationTokenSource();
if (!IsStarted)
{
return;
}
if (againTimeout < 4)
{
againTimeout = againTimeout * 2;
}
if (await _cts_connect.Token.WaitForSignalSettedAsync(againTimeout))
{
return;
}
goto StartAgain;
}
try
{
bool supportEncrypt = false;
byte[] clientKeyIV;
{
CommandMessage connmsg = new CommandMessage();
connmsg.Name = "ClientConnect";
List <string> arglist = new List <string>();
arglist.Add(this.Client.License.Key);
arglist.Add(this.Client.ServerPort.ToString());
byte[] encryptedKeyIV, sourceHash;
Client.License.GenerateSecureKeyAndHash(out clientKeyIV, out encryptedKeyIV, out sourceHash);
arglist.Add(Convert.ToBase64String(encryptedKeyIV));
arglist.Add(Convert.ToBase64String(sourceHash));
arglist.Add(supportEncrypt ? "1" : "0");
connmsg.Args = arglist.ToArray();
await _socket.SendAsync(connmsg.Pack(), SocketFlags.None);
//LogMessage("wait for conn msg");
connmsg = await CommandMessage.ReadFromSocketAsync(_socket);
if (connmsg == null)
{
TcpMapService.LogMessage("no message ? Connected:" + _socket.Connected);
return;
}
//LogMessage("connmsg : " + connmsg.Name + " : " + string.Join(",", connmsg.Args));
if (connmsg.Name != "ConnectOK")
{
IsStarted = false; //don't go until start it again.
throw new Exception(connmsg.Name + " : " + string.Join(",", connmsg.Args));
}
if (connmsg.Args[1] == "0")
{
supportEncrypt = false;
}
}
IsConnected = true;
connectedTimes++;
LogMessage("ConnectOK #" + connectedTimes);
if (supportEncrypt)
{
Client.License.OverrideStream(_socket.CreateStream(), clientKeyIV, out _sread, out _swrite);
}
else
{
_sread = _swrite = _socket.CreateStream();
}
for (int i = 0; i < Math.Min(5, Client.PreSessionCount); i++) //TODO:const of 5
{
_ = Task.Run(ProvidePreSessionAsync);
}
_ = Task.Run(MaintainSessionsAsync);
byte[] readbuff = new byte[TcpMapService.DefaultBufferSize];
while (IsStarted)
{
CommandMessage msg;
var cts = new CancellationTokenSource();
_ = Task.Run(async delegate
{
if (await cts.Token.WaitForSignalSettedAsync(16000))
{
return;
}
await _swrite.WriteAsync(new CommandMessage("_ping_", "forread").Pack());
});
try
{
msg = await CommandMessage.ReadFromStreamAsync(_sread);
}
finally
{
cts.Cancel();
}
if (msg == null)
{
TcpMapService.LogMessage("no message ? Connected:" + _socket.Connected);
return;
}
//this.LogMessage("TcpMapClientWorker get msg " + msg);
switch (msg.Name)
{
case "StartSession":
Task.Run(async delegate
{
try
{
await DoStartSessionAsync(msg);
}
catch (Exception x)
{
OnError(x);
}
}).ToString();
break;
case "CloseSession":
Task.Run(async delegate
{
try
{
await DoCloseSessionAsync(msg);
}
catch (Exception x)
{
OnError(x);
}
}).ToString();
break;
case "_ping_":
await _swrite.WriteAsync(new CommandMessage("_ping_result_").Pack());
break;
case "_ping_result_":
break;
default:
LogMessage("Error: 4 Ignore message " + msg);
break;
}
}
}
catch (SocketException)
{
//no log
}
catch (Exception x)
{
OnError(x);
}
if (IsStarted)
{
_socket.CloseSocket(); //logic failed..
againTimeout = 125;
goto StartAgain;
}
}
catch (Exception x)
{
OnError(x);
}
IsStarted = false;
IsConnected = false;
if (_socket != null)
{
try
{
_socket.CloseSocket();
}
catch (Exception x)
{
OnError(x);
}
_socket = null;
}
}
protected abstract Task WriteMessageAsync(CommandMessage msg);
protected override async Task WriteMessageAsync(CommandMessage msg)
{
await _swrite.WriteAsync(msg.Pack());
}
private static async Task ProcesSocketAsync(Socket socket)
{
while (true)
{
var msg = await CommandMessage.ReadFromSocketAsync(socket);
if (msg == null)
{
//LogMessage("no message ? Connected:" + socket.Connected);
return;
}
//LogMessage("new msg : " + msg);
switch (msg.Name)
{
case "ClientConnect":
case "SessionConnect":
await TcpMapServerClient.AcceptConnectAndWorkAsync(socket, msg);
return;
case "ConnectorConnect":
var server = FindServerWorkerByPort(int.Parse(msg.Args[1]));
string failedmsg = null;
if (server == null)
{
failedmsg = "NoPort";
}
else if (server.Server.IsDisabled)
{
failedmsg = "IsDisabled";
}
else if (!server.Server.AllowConnector)
{
failedmsg = "NotAllow";
}
else if (server.Server.ConnectorLicense == null)
{
failedmsg = "NotLicense";
}
else if (server.Server.ConnectorLicense.Key != msg.Args[0])
{
failedmsg = "LicenseNotMatch";
}
if (failedmsg != null)
{
var resmsg = new CommandMessage("ConnectFailed", failedmsg);
await socket.SendAsync(resmsg.Pack(), SocketFlags.None);
}
else
{
TcpMapServerConnector connector = new TcpMapServerConnector(server);
await connector.AcceptConnectorAndWorkAsync(socket, msg);
}
break;
case "": //other direct request..
default:
throw new Exception("Invaild command " + msg.Name);
}
}
}
async Task WorkAsync(CommandMessage connmsg)
{
if (connmsg.Name == "SessionConnect")
{
_is_client = false;
_is_session = true;
}
byte[] clientKeyIV;
_worker = TcpMapService.FindServerWorkerByKey(connmsg.Args[0], int.Parse(connmsg.Args[1]));
string failedreason = null;
if (_worker == null)
{
failedreason = "NotFound";
}
else if (!_worker.Server.IsValidated)
{
failedreason = "NotValidated";
}
else if (_worker.Server.IsDisabled)
{
failedreason = "NotEnabled";
}
if (_worker == null || !string.IsNullOrEmpty(failedreason))
{
var failedmsg = new CommandMessage("ConnectFailed", failedreason);
await _socket.SendAsync(failedmsg.Pack(), SocketFlags.None);
return;
}
bool supportEncrypt = _worker.Server.UseEncrypt;
if (connmsg.Args[4] == "0")
{
supportEncrypt = false;
}
try
{
_worker.Server.License.DescriptSourceKey(Convert.FromBase64String(connmsg.Args[2]), Convert.FromBase64String(connmsg.Args[3]), out clientKeyIV);
}
catch (Exception x)
{
_worker.OnError(x);
var failedmsg = new CommandMessage("ConnectFailed", "InvalidSecureKey");
await _socket.SendAsync(failedmsg.Pack(), SocketFlags.None);
return;
}
var successMsg = new CommandMessage("ConnectOK", "ConnectOK", supportEncrypt ? "1" : "0");
await _socket.SendAsync(successMsg.Pack(), SocketFlags.None);
if (supportEncrypt)
{
_worker.Server.License.OverrideStream(_socket.CreateStream(), clientKeyIV, out _sread, out _swrite);
}
else
{
_sread = _swrite = _socket.CreateStream();
}
if (_is_session)
{
this.SessionId = connmsg.Args[5];
if (SessionId == null)
{
_cts_wait_upgrade = new CancellationTokenSource();
}
}
_worker.AddClientOrSession(this);
try
{
if (_is_client)
{
_ = _swrite.WriteAsync(new CommandMessage("SetOption", "ClientEndPoint", _socket.RemoteEndPoint.ToString()).Pack());
while (true)
{
var msg = await CommandMessage.ReadFromStreamAsync(_sread);
//process it...
if (msg == null)
{
//TcpMapService.LogMessage("no message ? Connected:" + _socket.Connected);
throw new SocketException(995);
}
//_worker.LogMessage("TcpMapServerClient get msg " + msg);
switch (msg.Name)
{
case "SetOption":
string optvalue = msg.Args[1];
switch (msg.Args[0])
{
case "RouterClientPort":
this.OptionRouterClientPort = int.Parse(optvalue);
break;
default:
_worker.LogMessage("Error:Ignore option " + msg);
break;
}
break;
case "StartSessionResult":
case "CloseSessionResult":
case "CreateUDPNatResult":
long reqid = long.Parse(msg.Args[0]);
if (reqmap.TryGetValue(reqid, out var ritem))
{
ritem.Response = msg;
ritem.cts.Cancel();
}
else
{
_worker.LogMessage("Request Expired : " + msg);
}
break;
case "_ping_":
this._lastPingTime = DateTime.Now;
await _swrite.WriteAsync(new CommandMessage("_ping_result_").Pack());
break;
case "_ping_result_":
break;
default:
_worker.LogMessage("Error: 5 Ignore message " + msg);
break;
}
}
}
else if (_is_session)
{
if (SessionId == null)
{
_worker.LogMessage($"Warning:ServerClient*{_scid} Wait for Upgrade To Session ");
while (SessionId == null)
{
if (await _cts_wait_upgrade.Token.WaitForSignalSettedAsync(28000)) //check the presession closed or not every 28 seconds
{
if (SessionId != null)
{
break; //OK, session attached.
}
throw new SocketException(995); //_cts_wait_upgrade Cancelled , by SessionId is not seted
}
//if (!_socket.Connected) //NEVER useful..
//{
// _worker.LogMessage("Warning:presession exit.");
// throw new SocketException(995);
//}
if (!_socket.Poll(0, SelectMode.SelectRead)) //WORKS..
{
continue;
}
if (_socket.Available == 0)
{
_worker.LogMessage("Warning:presession exit!");
throw new SocketException(995);
}
//_worker.LogMessage("Warning:presession send message before upgrade ?"+_socket.Available);
if (!_cts_wait_upgrade.IsCancellationRequested)
{
//TODO:not locked/sync, not so safe it the presession is upgrading
var msg = await CommandMessage.ReadFromSocketAsync(_socket);
if (msg.Name == "_ping_")
{
byte[] resp = new CommandMessage("_ping_result_").Pack();
await _socket.SendAsync(resp, SocketFlags.None);
}
else
{
_worker.LogMessage("Warning:presession unexpected msg : " + msg);
}
}
}
_worker.LogMessage($"Warning:ServerClient*{_scid} SessionId:" + SessionId);
}
int waitMapTimes = 0;
TryGetMap:
if (_attachedSession != null)
{
_worker.LogMessage($"ServerClient*{_scid} use attached Session : {SessionId} *{waitMapTimes}");
await _attachedSession.UseThisSocketAsync(_sread, _swrite);
}
else if (_worker.sessionMap.TryGetValue(SessionId, out var session))
{
_worker.LogMessage($"ServerClient*{_scid} session server ok : {SessionId} *{waitMapTimes}");
await session.UseThisSocketAsync(_sread, _swrite);
}
else
{
if (waitMapTimes < 5)
{
waitMapTimes++;
await Task.Delay(10); //wait sessionMap be added..
goto TryGetMap;
}
_worker.LogMessage($"Warning:ServerClient*{_scid} session not found : {SessionId}");
throw new Exception($"ServerClient*{_scid} session not found : {SessionId}");
}
}
else
{
throw new InvalidOperationException();
}
}
catch (SocketException)
{
//no log
}
catch (Exception x)
{
_worker.OnError(x);
}
finally
{
_worker.RemoveClientOrSession(this);
}
_worker.LogMessage($"ServerClient*{_scid} WorkAsync END " + SessionId);
}
internal async Task AcceptConnectorAndWorkAsync(Socket clientSock, CommandMessage connmsg)
{
bool supportEncrypt = _worker.Server.UseEncrypt;
if (connmsg.Args[4] == "0")
{
supportEncrypt = false;
}
byte[] clientKeyIV;
try
{
_worker.Server.ConnectorLicense.DescriptSourceKey(Convert.FromBase64String(connmsg.Args[2]), Convert.FromBase64String(connmsg.Args[3]), out clientKeyIV);
}
catch (Exception x)
{
_worker.OnError(x);
var failedmsg = new CommandMessage("ConnectFailed", "InvalidSecureKey");
await clientSock.SendAsync(failedmsg.Pack(), SocketFlags.None);
return;
}
TcpMapServerClient sclient = _worker.FindClient();
if (sclient == null)
{
var failedmsg = new CommandMessage("ConnectFailed", "NoClient");
await clientSock.SendAsync(failedmsg.Pack(), SocketFlags.None);
return;
}
string mode = connmsg.Args[5];
string connArgument = connmsg.Args[6];
if (mode == "USB") //use server bandwidth
{
var resmsg = new CommandMessage("ConnectOK", "ConnectOK", supportEncrypt ? "1" : "0");
await clientSock.SendAsync(resmsg.Pack(), SocketFlags.None);
Stream _sread, _swrite;
if (supportEncrypt)
{
_worker.Server.ConnectorLicense.OverrideStream(clientSock.CreateStream(), clientKeyIV, out _sread, out _swrite);
}
else
{
_sread = _swrite = clientSock.CreateStream();
}
using Socket localsock = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
string ip = _worker.Server.ServerBind;
if (ip == "0.0.0.0")
{
ip = "127.0.0.1";
}
localsock.InitTcp();
await localsock.ConnectAsync(ip, _worker.Server.ServerPort);
TcpMapConnectorSession session = new TcpMapConnectorSession(new SimpleSocketStream(localsock));
await session.DirectWorkAsync(_sread, _swrite);
}
else if (mode == "UDP")
{
if (_udpcache == null)
{
lock (typeof(TcpMapServerConnector))
{
if (_udpcache == null)
{
var opt = new MemoryCacheOptions();
Microsoft.Extensions.Options.IOptions <MemoryCacheOptions> iopt = Microsoft.Extensions.Options.Options.Create(opt);
_udpcache = new MemoryCache(iopt);
}
}
}
UdpInfoItem natinfo;
string key = connArgument + ":" + sclient.SessionId;
if (!_udpcache.TryGetValue(key, out natinfo) || natinfo.HasExpired())
{
var udpmsg = await sclient.CreateUDPNatAsync(connArgument);
string[] pair = udpmsg.Args[1].Split(':');
string addr = pair[0];
int port = int.Parse(pair[1]);
natinfo = new UdpInfoItem(addr + ":" + port);
_udpcache.Set(key, natinfo);
}
var resmsg = new CommandMessage("ConnectOK", "ConnectOK", supportEncrypt ? "1" : "0", natinfo.NatInfo);
await clientSock.SendAsync(resmsg.Pack(), SocketFlags.None);
resmsg = await CommandMessage.ReadFromSocketAsync(clientSock);
if (resmsg == null)
{
return;
}
throw new NotImplementedException("work for " + resmsg);
}
else if (mode == "RCP")
{
var resmsg = new CommandMessage("ConnectOK", "ConnectOK", supportEncrypt ? "1" : "0"
, ((IPEndPoint)sclient._socket.RemoteEndPoint).Address.ToString(), sclient.OptionRouterClientPort.ToString());
await clientSock.SendAsync(resmsg.Pack(), SocketFlags.None);
}
else
{
throw new NotImplementedException();
}
}
private async Task WorkAsync()
{
this.IsStarted = true;
this.IsConnected = false;
//LogMessage("ClientSession WorkAsync start");
int connectedTimes = 0;
try
{
int againTimeout = 125;
StartAgain:
this.sock_server = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
this.sock_server.InitTcp();
this.cts_connect = new CancellationTokenSource();
try
{
await this.sock_server.ConnectAsync(this.Client.ServerHost, 6022);
//LogMessage("connected to 6022");
}
catch (Exception x)
{
this.OnError(x);
this.sock_server.CloseSocket();
this.sock_server = null;
this.cts_connect = new CancellationTokenSource();
if (!this.IsStarted)
{
return;
}
if (againTimeout < 4)
{
againTimeout *= 2;
}
if (await this.cts_connect.Token.WaitForSignalSettedAsync(againTimeout))
{
return;
}
goto StartAgain;
}
try
{
bool supportEncrypt = this.Client.UseEncrypt;
byte[] clientKeyIV;
{
CommandMessage connmsg = new CommandMessage
{
Name = "SessionConnect"
};
List <string> arglist = new List <string>
{
this.Client.License.Key,
this.Client.ServerPort.ToString()
};
this.Client.License.GenerateSecureKeyAndHash(out clientKeyIV, out byte[] encryptedKeyIV, out byte[] sourceHash);
arglist.Add(Convert.ToBase64String(encryptedKeyIV));
arglist.Add(Convert.ToBase64String(sourceHash));
arglist.Add(supportEncrypt ? "1" : "0");
arglist.Add(this.SessionId);//sessionid at [5]
connmsg.Args = arglist.ToArray();
await this.sock_server.SendAsync(connmsg.Pack(), SocketFlags.None);
//LogMessage("wait for conn msg");
connmsg = await CommandMessage.ReadFromSocketAsync(this.sock_server);
if (connmsg == null)
{
TcpMapService.LogMessage("no message ? Connected:" + this.sock_server.Connected);
return;
}
//LogMessage("connmsg : " + connmsg.Name + " : " + string.Join(",", connmsg.Args));
if (connmsg.Name != "ConnectOK")
{
this.IsStarted = false;//don't go until start it again.
throw new Exception(connmsg.Name + " : " + string.Join(",", connmsg.Args));
}
if (supportEncrypt && connmsg.Args[1] == "0")
{
supportEncrypt = false; this.LogMessage("Warning:server don't support encryption.");
}
}
this.IsConnected = true;
connectedTimes++;
//LogMessage("ConnectOK #" + connectedTimes);
if (supportEncrypt)
{
this.Client.License.OverrideStream(this.sock_server.CreateStream(), clientKeyIV, out this.sread, out this.swrite);
}
else
{
this.sread = this.swrite = this.sock_server.CreateStream();
}
if (string.IsNullOrEmpty(this.SessionId))
{
//wait for Upgrade
while (this.SessionId == null)
{
CommandMessage msg;
var cts = new CancellationTokenSource();
_ = Task.Run(async delegate
{
if (await cts.Token.WaitForSignalSettedAsync(16000))
{
return;
}
await this.swrite.WriteAsync(new CommandMessage("_ping_", "forread").Pack());
});
try
{
msg = await CommandMessage.ReadFromStreamAsync(this.sread);
}
finally
{
cts.Cancel();
}
if (msg == null)
{
throw (new SocketException(995));
}
switch (msg.Name)
{
case "UpgradeSession":
try
{
this.sock_local = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
this.sock_local.InitTcp();
await this.sock_local.ConnectWithTimeoutAsync(this.Client.ClientHost, this.Client.ClientPort, 12000);
}
catch (Exception x)
{
TcpMapService.OnError(x);
await this.swrite.WriteAsync(new CommandMessage("UpgradeSessionResult", "Failed").Pack());
continue;
}
this.SessionId = msg.Args[0];
if (this.cts_upgrade != null)
{
this.cts_upgrade.Cancel();
}
await this.swrite.WriteAsync(new CommandMessage("UpgradeSessionResult", "OK").Pack());
break;
case "_ping_":
await this.swrite.WriteAsync(new CommandMessage("_ping_result_").Pack());
break;
case "_ping_result_":
break;
default:
this.LogMessage("Error: 1 Ignore message " + msg);
break;
}
}
}
await this.WorkAsync(this.sock_local.CreateStream());
}
catch (Exception x)
{
this.OnError(x);
}
}
catch (SocketException)
{
}
catch (Exception x)
{
this.OnError(x);
}
this.IsStarted = false;
this.IsConnected = false;
this.sock_server?.CloseSocket();
this.sock_local?.CloseSocket();
this.workend = true;
}
protected override async Task WriteMessageAsync(CommandMessage msg)
{
this.lastwritetime = DateTime.Now;
await this.swrite.WriteAsync(msg.Pack());
}
private async Task DoCreateUDPNatAsync(CommandMessage msg)
{
try
{
string[] peerinfo = msg.Args[1].Split(":");
string peeraddr = peerinfo[0];
int peerport = int.Parse(peerinfo[1]);
LogMessage("Warning:send whoami to " + Client.ServerHost + ":6023");
UdpClient udp = new UdpClient();
udp.Client.ReceiveTimeout = 4321;
udp.Client.SendTimeout = 4321;
udp.Send(Encoding.ASCII.GetBytes("whoami"), 6, Client.ServerHost, 6023);
LogMessage("Warning:udp.ReceiveAsync");
ReadAgain:
var rr = await udp.ReceiveAsync(); //TODO: add timeout..
if (rr.RemoteEndPoint.Port != 6023)
{
goto ReadAgain;
}
string exp = Encoding.ASCII.GetString(rr.Buffer);
LogMessage("Warning:udp get " + exp);
if (!exp.StartsWith("UDP="))
{
throw (new Exception("failed"));
}
exp = exp.Remove(0, 4);
msg.Args[1] = exp;
//TODO: shall cache and reuse this address ? but always send "hello" to new peer again..
ClientWorkerUDPConnector udpconn = new ClientWorkerUDPConnector();
udpconn.Start(this, udp, exp);
IPEndPoint pperep = new IPEndPoint(IPAddress.Parse(peeraddr), peerport);
_ = Task.Run(async delegate
{
byte[] msgdata = UDPMeta.CreateSessionIdle(-1);
for (int i = 0; i < 10; i++)
{
if (udpconn.IsEverConnected(pperep))
{
return;
}
udp.Send(msgdata, msgdata.Length, pperep);
Console.WriteLine("SENT " + pperep + " via " + exp);
await Task.Delay(100);
}
});
}
catch (Exception x)
{
OnError(x);
msg.Args[1] = "Error";
}
msg.Name = "CreateUDPNatResult";
this.LogMessage("TcpMapClientWorker sending " + msg);
await _swrite.WriteAsync(msg.Pack());
}