class Bundler::Settings::TCPSocketProbe

def replies?(mirror)
  MirrorSockets.new(mirror).any? do |socket, address, timeout|
    socket.connect_nonblock(address)
  rescue Errno::EINPROGRESS
    wait_for_writtable_socket(socket, address, timeout)
  rescue RuntimeError # Connection failed somehow, again
    false
  end
end