Socket test if remote address can connect and set timeout for connection

public class Testconnect

{

String hostip = "";

int port = 3314;

public string recmsg = "";

Socket socketc = null;

Private readonly ManualResetEvent timeoutobject = new ManualResetEvent (false);

Public Testconnect (string hostip, int port)

{

This.hostip = HostIP;

This.port = port;

}

public bool Connect ()

{

Create an endpoint (EndPoint)

IPAddress IP = ipaddress.parse (hostip);//Convert IP address string to an instance of the IPAddress type

IPEndPoint ipe = new IPEndPoint (IP, port);//Initializes a new instance of the IPEndPoint class with the specified port and IP

Create socket

SOCKETC = new Socket (addressfamily.internetwork, SocketType.Stream, protocoltype.tcp);//Create a socket pair image, if using the UDP protocol, You want to use a socket of type Sockettype.dgram

Try

{

Return Connect (ipe,3000);

}

catch (SocketException ex)

{

Socketc.close ();

SOCKETC = null;

return false;

}

}

<summary>

Socket connection Request

</summary>

<param name= "Remoteendpoint" > Network Endpoints </param>

<param name= "Timeoutmsec" > Time Out </param>

public bool Connect (ipendpoint remoteendpoint, int timeoutmsec)

{

Timeoutobject.reset ();

Socketc = new Socket (AddressFamily.InterNetwork, SocketType.Stream, protocoltype.tcp);

Socketc.beginconnect (Remoteendpoint, Callbackmethod, socketc);

Block Current thread

if (Timeoutobject.waitone (Timeoutmsec, False))

{

return true;

}

Else

{

return false;

}

}

--Async callback method

private void Callbackmethod (IAsyncResult asyncresult)

{

Make the blocked thread continue

Socket socket = asyncresult. AsyncState as Socket;

if (socket. Connected)

{

Socket. EndConnect (asyncresult);

}

Timeoutobject.set ();

}

public void Testonline (String msg)

{

Socketc.send (encoding.getencoding ("gb2312"). GetBytes (msg));

Try

{

Create a communication thread

Parameterizedthreadstart pts = new Parameterizedthreadstart (serverrecmsg);

Thread thr = new Thread (pts);

Thr. IsBackground = true;

Start thread

Thr. Start (SOCKETC);

}

Catch

{throw;}

}

　　

<summary>

Receiving information from the client

</summary>

<param name= "Socketclientpara" > Client socket Object </param>

private void Serverrecmsg (object Socketclientpara)

{

Socket socketserver = Socketclientpara as socket;

byte[] arrserverrecmsg = new byte[100];

int Len;

while (len = socketserver.receive (arrserverrecmsg))! = 0)

{

Converts a machine-accepted byte array into a string that can be read by a human

Recmsg = Encoding.Default.GetString (arrserverrecmsg, 0, Len);

if (recmsg = = "Online")

{

Break

}

}

}

}

Socket test if remote address can connect and set timeout for connection (RPM)