module Net::SSH::Transport::PacketStream

def peer_ip

the socket.
The IP address of the peer (remote) end of the socket, as reported by 
def peer_ip
  @peer_ip ||=
    if respond_to?(:getpeername)
      addr = getpeername
      Socket.getnameinfo(addr, Socket::NI_NUMERICHOST | Socket::NI_NUMERICSERV).first
    else
      PROXY_COMMAND_HOST_IP
    end
end