Daytime.5 - A synchronous UDP daytime server

This tutorial program shows how to use asio to implement a server application with UDP.

int main()
{
  try
  {
    asio::io_context io_context;

Create an ip::udp::socket object to receive requests on UDP port 13.

    udp::socket socket(io_context, udp::endpoint(udp::v4(), 13));

Wait for a client to initiate contact with us. The remote_endpoint object will be populated by ip::udp::socket::receive_from().

Determine what we are going to send back to the client.

Send the response to the remote_endpoint.

Finally, handle any exceptions.