Unicode C++

Bind and Listen on a Randomly Selected Unused Port

See more Socket/SSL/TLS Examples

Demonstrates how to bind and listen on a randomly selected unused port.

Note:The ListenPort property used in this example is available starting in Chilkat v9.5.0.59.

Unicode C++

#include <CkSocketW.h>

void ChilkatSample(void)
    {
    bool success = false;

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

    CkSocketW listenSocket;

    // Pass a value of 0 for the port number to randomly select
    // an unused port.
    // (The 2nd argument allows for a backlog of 25 pending connection requests when accepting connections.)
    success = listenSocket.BindAndListen(5555,25);
    if (success != true) {
        wprintf(L"%s\n",listenSocket.lastErrorText());
        return;
    }

    // Find out what port was chosen.
    // Note: The ListenPort propety was added in Chilkat v9.5.0.59
    int listenPort = listenSocket.get_ListenPort();
    wprintf(L"Chosen listen port = %d\n",listenPort);
    }