public MobileTcpListener(MobileNetworkSettings settings, UsersService userService)
{
_settings = settings;
_listener = new TcpSocketListener ();
_userService = userService;
_listener.ConnectionReceived = OnConnectionReceived;
}
public TcpSocketListenerPage()
{
_listener = new TcpSocketListener();
_messagesSub = new Subject<Message>();
_messagesObs = _messagesSub.AsObservable();
_listener.ConnectionReceived += (sender, args) =>
{
var client = args.SocketClient;
Device.BeginInvokeOnMainThread(() => _clients.Add(client));
Task.Factory.StartNew(() =>
{
foreach (var msg in client.ReadStrings(_canceller.Token))
{
_messagesSub.OnNext(msg);
}
Device.BeginInvokeOnMainThread(()=> _clients.Remove(client));
}, TaskCreationOptions.LongRunning);
};
InitView();
}
public async Task TcpSocketClient_ShouldSendReceiveData()
{
var bytesToSend = new byte[] {0x1, 0x2, 0x3, 0x4, 0x5};
var len = bytesToSend.Length;
var port = PortGranter.GrantPort();
var listener = new TcpSocketListener();
await listener.StartListeningAsync(port);
var tcs = new TaskCompletionSource<bool>();
listener.ConnectionReceived += async (sender, args) =>
{
var bytesReceived = new byte[len];
await args.SocketClient.ReadStream.ReadAsync(bytesReceived, 0, len);
var allSame =
Enumerable
.Zip(bytesToSend,
bytesReceived,
(s, r) => s == r)
.All(b => b);
tcs.SetResult(allSame);
};
var client = new TcpSocketClient();
await client.ConnectAsync("127.0.0.1", port);
await client.WriteStream.WriteAsync(bytesToSend, 0, len);
var ok = await tcs.Task;
await listener.StopListeningAsync();
Assert.True(ok);
}
public async Task StartServer(int port, bool singleConnection)
{
// Create TCP listener
var listener = new TcpSocketListener(2048);
listener.ConnectionReceived = async (sender, args) =>
{
var clientSocketContext = new SimpleSocket();
try
{
// Stop listening if we accept only a single connection
if (singleConnection)
await listener.StopListeningAsync();
clientSocketContext.SetSocket((TcpSocketClient)args.SocketClient);
// Do an ack with magic packet (necessary so that we know it's not a dead connection,
// it sometimes happen when doing port forwarding because service don't refuse connection right away but only fails when sending data)
await SendAndReceiveAck(clientSocketContext.socket, MagicAck, MagicAck);
if (Connected != null)
Connected(clientSocketContext);
clientSocketContext.isConnected = true;
}
catch (Exception)
{
clientSocketContext.DisposeSocket();
}
};
// Start listening
await listener.StartListeningAsync(port);
}
/// <inheritdoc/>
public override async Task<FtpResponse> Process(FtpCommand command, CancellationToken cancellationToken)
{
if (Data.PassiveSocketClient != null)
{
await Data.PassiveSocketClient.DisconnectAsync();
Data.PassiveSocketClient.Dispose();
Data.PassiveSocketClient = null;
}
if (Data.TransferTypeCommandUsed != null && !string.Equals(command.Name, Data.TransferTypeCommandUsed, StringComparison.OrdinalIgnoreCase))
return new FtpResponse(500, $"Cannot use {command.Name} when {Data.TransferTypeCommandUsed} was used before.");
int port;
var isEpsv = string.Equals(command.Name, "EPSV", StringComparison.OrdinalIgnoreCase);
if (isEpsv)
{
if (string.IsNullOrEmpty(command.Argument) || string.Equals(command.Argument, "ALL", StringComparison.OrdinalIgnoreCase))
{
port = 0;
}
else
{
port = Convert.ToInt32(command.Argument, 10);
}
}
else
{
port = 0;
}
Data.TransferTypeCommandUsed = command.Name;
var sem = new SemaphoreSlim(0, 1);
var listener = new TcpSocketListener();
listener.ConnectionReceived += (sender, args) =>
{
Data.PassiveSocketClient = args.SocketClient;
sem.Release();
};
await listener.StartListeningAsync(port);
var localPort = listener.LocalPort;
if (isEpsv || Server.ServerAddress.Contains(":"))
{
var listenerAddress = new Address(localPort);
await Connection.WriteAsync(new FtpResponse(229, $"Entering Extended Passive Mode ({listenerAddress})."), cancellationToken);
}
else
{
var listenerAddress = new Address(Server.ServerAddress, localPort);
await Connection.WriteAsync(new FtpResponse(227, $"Entering Passive Mode ({listenerAddress})."), cancellationToken);
}
await sem.WaitAsync(TimeSpan.FromSeconds(5), cancellationToken);
await listener.StopListeningAsync();
listener.Dispose();
return null;
}
public async Task TcpSocketClient_ShouldBeAbleToConnect()
{
var port = PortGranter.GrantPort();
var listener = new TcpSocketListener();
await listener.StartListeningAsync(port);
var sut = new TcpSocketClient();
await sut.ConnectAsync("127.0.0.1", port);
await listener.StopListeningAsync();
// getting here means nothing went boom
Assert.True(true);
}
public GWServerHttp(int serverPort = DefaultPort, IGWClient[] clients = null)
{
_listener = new TcpSocketListener();
_port = serverPort;
if (clients != null)
{
foreach (IGWClient client in clients)
_clients.Add(client.Name.ToLower(), client);
}
_listener.ConnectionReceived += (s, e) => ProcessRequestAsync(e.SocketClient);
}
public Server()
{
this.IsMulticastConnected = false;
this._receiver = new UdpSocketMulticastClient();
this._receiver.MessageReceived += MessageReceived;
this._listener = new TcpSocketListener();
this._listener.ConnectionReceived += ListenerConnectionReceived;
IsMulticastConnected = JoinMultiUdp();
if (!IsMulticastConnected)
{
var msg = new Message(MessageTypes.NetworkWarning, "Cannot connect to multicast UDP.");
MessageManager.SendMessage(msg);
}
}
public async Task StartServer(int port, bool singleConnection, int retryCount = 1)
{
// Create TCP listener
var listener = new TcpSocketListener(2048);
listener.ConnectionReceived = async (sender, args) =>
{
var clientSocketContext = new SimpleSocket();
try
{
// Stop listening if we accept only a single connection
if (singleConnection)
await listener.StopListeningAsync();
clientSocketContext.SetSocket((TcpSocketClient)args.SocketClient);
// Do an ack with magic packet (necessary so that we know it's not a dead connection,
// it sometimes happen when doing port forwarding because service don't refuse connection right away but only fails when sending data)
await SendAndReceiveAck(clientSocketContext.socket, MagicAck, MagicAck);
Connected?.Invoke(clientSocketContext);
clientSocketContext.isConnected = true;
}
catch (Exception)
{
clientSocketContext.DisposeSocket();
}
};
for (int i = 0; i < retryCount; ++i)
{
try
{
// Start listening
await listener.StartListeningAsync(port);
break; // Break if no exception, otherwise retry
}
catch (Exception)
{
// If there was an exception last try, propragate exception
if (i == retryCount - 1)
throw;
}
}
}
public string revc_text(int length)
{
string result = "";
var listener = new TcpSocketListener();
listener.ConnectionReceived += async (sender, args) =>
{
var _client = args.SocketClient;
List<byte> all_byte = new List<byte>();
for (int i = 0; i < length; i++)
{
var nextByte = await Task.Run(() => client.ReadStream.ReadByte());
all_byte.Add((byte)nextByte);
}
result = (new System.Text.UTF8Encoding()).GetString(all_byte.ToArray(), 0, all_byte.Count);
};
listener.StartListeningAsync(port[0]);
return result;
}
private async Task ExecuteServerListener(CancellationToken cancellationToken)
{
using (var listener = new TcpSocketListener(0))
{
listener.ConnectionReceived = ConnectionReceived;
await listener.StartListeningAsync(Port);
try
{
for (; ;)
{
cancellationToken.ThrowIfCancellationRequested();
await Task.Delay(100, cancellationToken);
}
}
finally
{
await listener.StopListeningAsync();
foreach (var connection in _connections.ToArray())
connection.Close();
}
}
}
async void loginButton_Clicked(object sender, EventArgs e)
{
StringBuilder sb = new StringBuilder("https://accounts.google.com/o/oauth2/auth");
// append query strings
sb.Append("?");
sb.Append("scope=email%20profile&");
sb.Append("redirect_uri=http://localhost:" + LISTEN_PORT + "&");
sb.Append("response_type=code&");
sb.Append("client_id=" + APP_ID);
Debug.WriteLine("url: " + sb.ToString());
webView.Source = sb.ToString();
webView.IsVisible = true;
TcpSocketListener listener = new TcpSocketListener();
listener.ConnectionReceived += DidConnect;
await listener.StartListeningAsync(LISTEN_PORT);
//HttpClient mClient = new HttpClient
//{
// BaseAddress = new Uri("https://accounts.google.com/o/oauth2/auth")
//};
//http://stackoverflow.com/questions/17096201/build-query-string-for-system-net-httpclient-get
}
[InlineData(1000)] // yes buffered stream
public async Task TcpSocketClient_ShouldBeAbleToDisconnectThenReconnect(int bufferSize)
{
TcpSocketClient sut = null;
var port = PortGranter.GrantPort();
var listener = new TcpSocketListener();
await listener.StartListeningAsync(port);
if (bufferSize != -1)
sut = new TcpSocketClient(bufferSize);
else
sut = new TcpSocketClient();
await sut.ConnectAsync("127.0.0.1", port);
await sut.DisconnectAsync();
await sut.ConnectAsync("127.0.0.1", port);
await sut.DisconnectAsync();
await listener.StopListeningAsync();
}
public async Task TcpSocketClient_ShouldSendReceiveDataSimultaneously(int bufferSize)
{
var port = PortGranter.GrantPort();
TcpSocketListener listener = null;
TcpSocketClient socket1 = null;
// get both ends of a connected socket, with or without buffer
if (bufferSize != -1)
{
listener = new TcpSocketListener(bufferSize);
socket1 = new TcpSocketClient(bufferSize);
}
else
{
listener = new TcpSocketListener();
socket1 = new TcpSocketClient();
}
var tcs = new TaskCompletionSource<ITcpSocketClient>();
await listener.StartListeningAsync(port);
listener.ConnectionReceived += (sender, args) => tcs.SetResult(args.SocketClient);
await socket1.ConnectAsync("127.0.0.1", port);
var socket2 = await tcs.Task;
await listener.StopListeningAsync();
// socket1 is the socket from the client end
// socket2 is the socket from the server end
// for five seconds, send and receive the data
var sentToSocket1 = new List<byte>();
var sentToSocket2 = new List<byte>();
var recvdBySocket1 = new List<byte>();
var recvdBySocket2 = new List<byte>();
// send random data and keep track of it
// also keep track of what is received
Func<ITcpSocketClient, List<byte>, List<byte>, CancellationToken, Task> sendAndReceive =
(socket, sent, recvd, token) =>
{
var r = new Random(socket.GetHashCode());
var send = Task.Run(async () =>
{
var buf = new byte[1000];
while (!token.IsCancellationRequested)
{
r.NextBytes(buf);
sent.AddRange(buf);
await socket.WriteStream.WriteAsync(buf, 0, buf.Length, token);
await socket.WriteStream.FlushAsync();
}
});
var recv = Task.Run(async () =>
{
var buf = new byte[1000];
while (!token.IsCancellationRequested)
{
await socket.ReadStream.ReadAsync(buf, 0, buf.Length, token);
recvd.AddRange(buf);
}
});
return Task.WhenAll(send, recv);
};
// let the sockets run for 2.5 seconds
var cts = new CancellationTokenSource();
var timer = Task.Run(() => Task.Delay(TimeSpan.FromSeconds(2.5)).ContinueWith(t => cts.Cancel()));
var socketRunners =
Task.WhenAll(
Task.Run(() => sendAndReceive(socket1, sentToSocket2, recvdBySocket1, cts.Token)),
Task.Run(() => sendAndReceive(socket2, sentToSocket1, recvdBySocket2, cts.Token))
);
await timer;
await socketRunners;
Debug.WriteLine("Sent to S1:{0}, Recvd by S1:{1}", sentToSocket1.Count, recvdBySocket1.Count);
Debug.WriteLine("Sent to S2:{0}, Recvd by S2:{1}", sentToSocket2.Count, recvdBySocket2.Count);
// zip will join up to the lowest index of both lists (must be recvd)
// it's ok if recvd is shorter than sent because we cancel abruptly,
// but we want to be sure that everything that was received matches
// everything that sent, and that we did both send and receive.
var socket1OK =
Enumerable.Zip(sentToSocket1,
recvdBySocket1,
(s, r) => s == r)
.All(b => b);
var socket2OK =
Enumerable.Zip(sentToSocket1,
recvdBySocket1,
(s, r) => s == r)
.All(b => b);
Assert.True(socket1OK, "Socket1 received data did not match what was sent to it");
Assert.True(socket2OK, "Socket2 received data did not match what was sent to it");
// eww, but does the job we need
Assert.True(recvdBySocket1.Count > 5000, String.Format("Socket 1 received data count was less than 5000 : {0}", recvdBySocket1.Count));
Assert.True(recvdBySocket2.Count > 5000, String.Format("Socket 2 received data count was less than 5000 : {0}", recvdBySocket2.Count));
await socket1.DisconnectAsync();
await socket2.DisconnectAsync();
}
public async Task TcpSocketClient_ShouldSendReceiveDataSimultaneously(int bufferSize)
{
var port = PortGranter.GrantPort();
TcpSocketListener listener = null;
TcpSocketClient socket1 = null;
// get both ends of a connected socket, with or without buffer
if (bufferSize != -1)
{
listener = new TcpSocketListener(bufferSize);
socket1 = new TcpSocketClient(bufferSize);
}
else
{
listener = new TcpSocketListener();
socket1 = new TcpSocketClient();
}
var tcs = new TaskCompletionSource<ITcpSocketClient>();
await listener.StartListeningAsync(port);
listener.ConnectionReceived += (sender, args) => tcs.SetResult(args.SocketClient);
await socket1.ConnectAsync("127.0.0.1", port);
var socket2 = await tcs.Task;
await listener.StopListeningAsync();
// socket1 is the socket from the client end
// socket2 is the socket from the server end
// for five seconds, send and receive the data
var sentToSocket1 = new List<byte>();
var sentToSocket2 = new List<byte>();
var recvdBySocket1 = new List<byte>();
var recvdBySocket2 = new List<byte>();
// send random data and keep track of it
// also keep track of what is received
Func<ITcpSocketClient, List<byte>, List<byte>, CancellationToken, Task> sendAndReceive =
(socket, sent, recvd, token) =>
{
var r = new Random(socket.GetHashCode());
var send = Task.Run(async () =>
{
var buf = new byte[1000];
while (!token.IsCancellationRequested)
{
r.NextBytes(buf);
sent.AddRange(buf);
await socket.WriteStream.WriteAsync(buf, 0, buf.Length, token);
await socket.WriteStream.FlushAsync(token);
}
});
var recv = Task.Run(async () =>
{
var buf = new byte[1000];
while (!token.IsCancellationRequested)
{
var len = await socket.ReadStream.ReadAsync(buf, 0, buf.Length, token);
recvd.AddRange(buf.Take(len));
}
});
var innerTcs = new TaskCompletionSource<bool>();
token.Register(() => innerTcs.SetResult(true));
return innerTcs.Task;
};
// let the sockets run for 2.5 seconds
var socketRunners =
Task.WhenAll(
Task.Run(() => sendAndReceive(socket1, sentToSocket2, recvdBySocket1, new CancellationTokenSource(TimeSpan.FromSeconds(2.5)).Token).ContinueWith(t=> Debug.WriteLine($"Socket 1 task completed: {t}"))),
Task.Run(() => sendAndReceive(socket2, sentToSocket1, recvdBySocket2, new CancellationTokenSource(TimeSpan.FromSeconds(2.5)).Token).ContinueWith(t => Debug.WriteLine($"Socket 2 task completed: {t}")))
);
await socketRunners;
Debug.WriteLine("Sent to S1:{0}, Recvd by S1:{1}", sentToSocket1.Count, recvdBySocket1.Count);
Debug.WriteLine("Sent to S2:{0}, Recvd by S2:{1}", sentToSocket2.Count, recvdBySocket2.Count);
// zip will join up to the lowest index of both lists (must be recvd)
// it's ok if recvd is shorter than sent because we cancel abruptly,
// but we want to be sure that everything that was received matches
// everything that sent, and that we did both send and receive.
var socket1Errors =
Enumerable.Zip(recvdBySocket1, sentToSocket1,
(r, s) => s == r)
.Count(b => !b);
var socket2Errors =
Enumerable.Zip(recvdBySocket2,
sentToSocket2,
(r, s) => s == r)
.Count(b => !b);
var max = new[] {recvdBySocket1.Count, recvdBySocket2.Count, sentToSocket1.Count, sentToSocket2.Count}.Max();
Func<List<byte>, int, string> getValueOrStars =
(bytes, i) => bytes.Count > i ? ((int) bytes[i]).ToString().PadLeft(3, '0') : "***";
var rows =
Enumerable.Range(0, max - 1)
.Select(i =>
{
var sTo1 = getValueOrStars(sentToSocket1, i);
var rBy1 = getValueOrStars(recvdBySocket1, i);
var sTo2 = getValueOrStars(sentToSocket2, i);
var rBy2 = getValueOrStars(recvdBySocket2, i);
return new { Index = i, SentTo1 = sTo1, ReceivedBy1 = rBy1, SentTo2 = sTo2, ReceivedBy2 = rBy2};
})
.Where(r => (r.SentTo1 != r.ReceivedBy1 && r.ReceivedBy1 != "***") || (r.SentTo2 != r.ReceivedBy2 && r.ReceivedBy2 != "***"))
.Select(r=> $"{r.Index}: \t{r.SentTo1}\t{r.ReceivedBy1}\t{r.SentTo2}\t{r.ReceivedBy2}\t")
.Take(1000);
Func<IEnumerable<byte>, string> show = bs => $"[ {String.Join(", ", bs.Take(5).Select(b => (int) b))} ]";
if (socket1Errors > 0 || socket2Errors > 0)
{
Assert.True(socket1Errors == 0,
$"Socket1 received {socket1Errors} byte/s that did not match what was sent to it{Environment.NewLine}{String.Join(Environment.NewLine, rows)}");
Assert.True(socket2Errors == 0,
$"Socket2 received {socket2Errors} byte/s that did not match what was sent to it{Environment.NewLine}{String.Join(Environment.NewLine, rows)}");
}
// eww, but does the job we need
Assert.True(recvdBySocket1.Count > 5000, String.Format("Socket 1 received data count was less than 5000 : {0}", recvdBySocket1.Count));
Assert.True(recvdBySocket2.Count > 5000, String.Format("Socket 2 received data count was less than 5000 : {0}", recvdBySocket2.Count));
await socket1.DisconnectAsync();
await socket2.DisconnectAsync();
}
public TcpListener(NetworkSettings settings)
{
_settings = settings;
_listener = new TcpSocketListener();
}
private Task ExecuteServerListener(AutoResetEvent e)
{
return Task.Run(() =>
{
_log = LogManager?.CreateLog(typeof(FtpServer));
using (var listener = new TcpSocketListener(0))
{
listener.ConnectionReceived = ConnectionReceived;
try
{
e.Reset();
listener.StartListeningAsync(Port).Wait();
_log?.Debug("Server listening on port {0}", Port);
try
{
e.WaitOne();
}
finally
{
listener.StopListeningAsync().Wait();
foreach (var connection in _connections.ToArray())
connection.Close();
}
}
catch (Exception ex)
{
_log?.Fatal(ex, "{0}", ex.Message);
}
}
}
);
}