bcast_msg.cpp

#include <cstdlib>
#include <iostream>
#include <cstdint>
#include <string>
#include <boost/asio.hpp>

using namespace std;
using boost::asio::ip::udp;

// modify the port here: 4242 is an example

int main (int argc, char *argv[])
{
    if (argc != 2)
        {
            std::cerr << "Usage:" << argv[0] << " <port>" << std::endl;
            return -1;
        }
    const int port = std::stoi (argv[1]);
    boost::system::error_code error;
    boost::asio::io_service io_service;

    udp::socket socket (io_service);
    // Edit the message you want to send in following data[]
    // either you can use unsigned char type or unsigned int

    /*
    unsigned char data[]={
      0xaa,0xaa,0xaa,0xaa,
      0x11,0x22,0x33,0x44,
      0x11,0x22,0x33,0x44,
      0xaa,0xaa,0xaa,0xaa
    };
    */

    uint32_t data[] = { 0xaaaaaaaa, 0x00005000, 0x11223344, 0xaaaaaaaa };
    socket.open (boost::asio::ip::udp::v4 (), error);

    if (!error)
        {
            std::cerr << "OK" << std::endl;
            socket.set_option (boost::asio::ip::udp::socket::reuse_address (true));
            socket.set_option (boost::asio::socket_base::broadcast (true));


            boost::asio::ip::udp::endpoint senderEndPoint (boost::asio::ip::address_v4::broadcast (), port);
            socket.send_to (boost::asio::buffer (data, sizeof (data)), senderEndPoint);
            socket.close (error);
            std::cerr << error << std::endl;
        }
    return 0;
}