Accept Connection on Socket

Demonstrates how to create a TCP/IP socket, listen on a port, accept an incoming connection, and send a "Hello World" message to the client.

Downloads:

MS Windows Visual C/C++ Libraries

Linux/CentOS C/C++ Libraries

MAC OS X C/C++ Libraries

Solaris C/C++ Libraries

C++ Builder Libraries

// Needs #include <CkSocket.h>

    CkString strOut;

    CkSocket listenSocket;

    bool success;
    success = listenSocket.UnlockComponent("Anything for 30-day trial");
    if (success != true) {
        strOut.append("Failed to unlock component\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    //  Bind to a port and listen for incoming connections:
    //  This example will listen at port 5555 and allows for a backlog
    //  of 25 pending connection requests.
    success = listenSocket.BindAndListen(5555,25);
    if (success != true) {
        strOut.append(listenSocket.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    //  Get the next incoming connection
    //  Wait a maximum of 20 seconds (20000 millisec)
    CkSocket *connectedSocket = 0;
    connectedSocket = listenSocket.AcceptNextConnection(20000);
    if (connectedSocket == 0 ) {
        strOut.append(listenSocket.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    //  Set maximum timeouts for reading an writing (in millisec)
    connectedSocket->put_MaxReadIdleMs(10000);
    connectedSocket->put_MaxSendIdleMs(10000);

    //  Send a "Hello World!" message to the client:
    success = connectedSocket->SendString("Hello World!");
    if (success != true) {
        strOut.append(connectedSocket->lastErrorText());
        strOut.append("\r\n");
        delete connectedSocket;
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    //  Close the connection with the client.
    //  Wait a max of 20 seconds (20000 millsec)
    connectedSocket->Close(20000);

    strOut.append("success!\r\n");

    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());