1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
|
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Sockets;
using System.Reactive;
using System.Reactive.Concurrency;
using System.Reactive.Disposables;
using System.Reactive.Linq;
using System.Reactive.Subjects;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using Tango.Logging;
namespace Tango.Transport.Adapters
{
/// <summary>
/// Represents an <see cref="ITransportAdapter"/> which communicates over TCP/IP.
/// </summary>
/// <seealso cref="Tango.Transport.TransportAdapterBase" />
public class TcpTransportAdapter : TransportAdapterBase
{
private TcpClient _socket;
private Thread _pullThread;
private bool _initializedFromConstructor;
private byte[] _size_buffer;
#region Properties
/// <summary>
/// Gets or sets the TCP listener port.
/// </summary>
public int Port { get; set; }
#endregion
#region Constructors
/// <summary>
/// Initializes a new instance of the <see cref="TcpTransportAdapter"/> class.
/// </summary>
public TcpTransportAdapter()
{
Address = "127.0.0.1";
Port = 9999;
}
/// <summary>
/// Initializes a new instance of the <see cref="TcpTransportAdapter"/> class.
/// </summary>
/// <param name="address">The address.</param>
/// <param name="port">The port.</param>
public TcpTransportAdapter(String address, int port) : this()
{
Address = address;
Port = port;
}
/// <summary>
/// Initializes a new instance of the <see cref="TcpTransportAdapter"/> class.
/// </summary>
/// <param name="socket">The socket.</param>
public TcpTransportAdapter(TcpClient socket) : this()
{
_initializedFromConstructor = true;
_socket = socket;
Address = socket.GetIPAddress().ToStringSafe();
SetSocketProperties();
}
#endregion
#region Public Methods
/// <summary>
/// Connects the transport component.
/// </summary>
/// <returns></returns>
public override Task Connect()
{
ThrowIfDisposed();
return Task.Factory.StartNew(() =>
{
try
{
if (State != TransportComponentState.Connected)
{
if (!_initializedFromConstructor)
{
_socket = new TcpClient(Address, Port);
SetSocketProperties();
}
State = TransportComponentState.Connected;
_pullThread = new Thread(PullThreadMethod);
_pullThread.IsBackground = true;
_pullThread.Start();
LogManager.Log("TCP adapter Connected...");
}
}
catch (Exception ex)
{
throw LogManager.Log(ex, "Could not connect the TCP adapter.");
}
});
}
/// <summary>
/// Disconnects the transport component.
/// </summary>
/// <returns></returns>
public override Task Disconnect()
{
return Task.Factory.StartNew((Action)(() =>
{
try
{
if (State == TransportComponentState.Connected)
{
State = TransportComponentState.Disconnected;
_socket.Close();
LogManager.Log("TCP adapter disconnected.");
}
}
catch (Exception ex)
{
LogManager.Log(ex, "Could not disconnect the TCP adapter.");
}
}));
}
/// <summary>
/// Writes the specified data to the stream.
/// </summary>
/// <param name="data">The data.</param>
public override void Write(byte[] data)
{
ThrowIfDisposed();
try
{
data = PostProcessBuffer(data);
_socket.GetStream().Write(data, 0, data.Length);
}
catch (Exception ex)
{
OnFailed(LogManager.Log(ex));
}
}
#endregion
#region Pull Thread
private void PullThreadMethod()
{
try
{
if (State == TransportComponentState.Connected)
{
_size_buffer = new byte[4];
_socket.GetStream().BeginRead(_size_buffer, 0, _size_buffer.Length, EndReading, _socket.GetStream());
}
}
catch (Exception ex)
{
OnFailed(ex);
}
}
private void EndReading(IAsyncResult ar)
{
try
{
if (State == TransportComponentState.Connected)
{
_socket.GetStream().EndRead(ar);
int expectedSize = BitConverter.ToInt32(_size_buffer, 0);
if (expectedSize > 0)
{
byte[] data = new byte[expectedSize];
int read = 0;
while (read < expectedSize)
{
read += _socket.GetStream().Read(data, read, Math.Min(_socket.Available, expectedSize - read));
if (State != TransportComponentState.Connected)
{
break;
}
}
OnDataAvailable(data);
}
else
{
Thread.Sleep(2000);
}
PullThreadMethod();
}
}
catch (Exception ex)
{
OnFailed(ex);
}
}
#endregion
#region Private Methods
private void SetSocketProperties()
{
_socket.SendBufferSize = MAX_BUFFER_SIZE;
_socket.ReceiveBufferSize = MAX_BUFFER_SIZE;
}
#endregion
}
}
|
