Boost Asio get local ip address

main.cpp

#include <iostream>
#include <boost/asio.hpp>

using boost::asio::ip::udp;

// Build using g++ main.cpp -L /usr/include/boost -pthread

int main(int argc, char* argv[])
{
  try
  {
    boost::asio::io_service io_service;

    std::string endpoint_ip_str = "192.168.0.1";

    auto endpoint_ip = inet_network(endpoint_ip_str.c_str());
    auto endpoint_port = 8000;
    auto host_port = 8001;

    const boost::asio::ip::udp::endpoint endpoint(boost::asio::ip::address_v4(endpoint_ip), endpoint_port);
    boost::asio::ip::udp::socket socket(io_service, boost::asio::ip::udp::endpoint(boost::asio::ip::udp::v4(), host_port));
    
    socket.connect(endpoint);
    std::cerr << socket.local_endpoint() << std::endl;
  }
  catch (std::exception& e)
  {
    std::cerr << e.what() << std::endl;
  }

  return 0;
}

With

g++ main.cpp -L /usr/include/boost -pthread

Output:

192.168.0.136:8001