Question

I saw the official async udp server example from boost doc.
There you create a single udp socket, bind it to a local port and do something like this:

socket(ioService, boost::asio::ip::udp::endpoint(boost::asio::ip::udp::v4(), port))

socket.async_receive_from(buffer(data, max_length), senderEndpoint, boost::bind(&Request::HandleReceiveFrom, this,
    boost::asio::placeholders::error,
      boost::asio::placeholders::bytes_transferred));

How can I handle multiple concurrent udp connections from clients, because if I try to create another socket using

socket(ioService, boost::asio::ip::udp::endpoint(boost::asio::ip::udp::v4(), port))

i get bind errors because I already have a socket bound to the same port.

EDIT
I can send clients back responses using a different server source port but they will not recognize the response even though I sent the response back to the same client ip/client destination port.

Answer 1

As it seems the solution can be to use the same socket for sending back responses to clients. Have a look at this question response: Use same udp socket for async receive/send