class Net::SSH::Authentication::Agent

def send_and_wait(type, *args)

(See #send_packet and #read_packet).
Send the given packet and return the subsequent reply from the agent. 
def send_and_wait(type, *args)
  send_packet(type, *args)
  read_packet
rescue Errno::ECONNRESET, Errno::EPIPE => e
  # Linux reports an agent that closes with our request unread as a reset, not EOF.
  raise AgentClosedConnection, "agent closed the connection (#{e.class})"
end