How to check if socket is closed in Boost.Asio?

Question

What is the easiest way to check if a socket was closed on the remote side of the connection? socket::is_open() returns true even if it is closed on the remote

Answer 1

boost::asio::socket_base::keep_alive keepAlive(true);
peerSocket->set_option(keepAlive);

Enable keep alive for the peer socket. Use the native socket to adjust the keepalive interval so that as soon as the connection is closed the async_receive handler will get EOF while reading.

Configuring TCP keep_alive with boost::asio