C# example client socket class

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
// Program.cs file:

using System;
using System.Text;

public class Program
{
    public static void Main()
    {
        string host = "some-domain.com";
        int    port = 80;

        using (ClientSocket clientSocket = new ClientSocket(host, port))
        {
            // request:

            byte[] requestBytes = new byte[] {1, 2, 3, /* ... */};

            clientSocket.Send(requestBytes);

            // response:

            byte[] responseBuffer = new byte[1024];
            int responseSize = clientSocket.Receive(responseBuffer);

            // ...
          
            // cleaning:

            clientSocket.Close();
        }
    }
}


// ClientSocket.cs file:

using System;
using System.Net;
using System.Net.Sockets;

public class ClientSocket: IDisposable
{
    private bool disposed;

    private Socket socket;

    public ClientSocket(string host, int port)
    {
        IPHostEntry entry = Dns.GetHostEntry(host);

        this.socket = new Socket(SocketType.Stream, ProtocolType.Tcp);

        try
        {
            this.socket.Connect(entry.AddressList, port);
        }
        catch (SocketException ex)
        {
            this.socket.Dispose();

            throw ex;
        }
    }

    ~ClientSocket()
    {
        this.Dispose(false);
    }

    public int Send(byte[] buffer)
    {
        return this.socket.Send(buffer, SocketFlags.None);
    }

    public int Send(byte[] buffer, int offset, int size)
    {
        return this.socket.Send(buffer, offset, size, SocketFlags.None);
    }

    public int Receive(byte[] buffer)
    {
        return this.socket.Receive(buffer, SocketFlags.None);
    }

    public int Receive(byte[] buffer, int offset, int size)
    {
        return this.socket.Receive(buffer, offset, size, SocketFlags.None);
    }

    public void Close()
    {
        this.socket.Shutdown(SocketShutdown.Both);
        this.socket.Close();
    }

    protected virtual void Dispose(bool disposing)
    {
        if (!this.disposed)
        {
            if (disposing)
                this.socket.Dispose();

            this.disposed= true;
        }
    }

    public void Dispose()
    {
        this.Dispose(disposing: true);

        GC.SuppressFinalize(this);
    }
}