(MFC) 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.

Chilkat C/C++ Library Downloads MS Visual C/C++ Libs

See Also: Using MFC CString in Chilkat

#include <CkSocket.h>

void ChilkatSample(void)
    {
    CkString strOut;

    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkSocket listenSocket;

    // 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.
    bool 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 (listenSocket.get_LastMethodSuccess() == false) {
        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)
    success = connectedSocket->Close(20000);

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


    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());

    }