import socket
data_payload = 2048

def reuse_socket_addr():
    sock = socket.socket( socket.AF_INET, socket.SOCK_STREAM )

    # Get the old state of the SO_REUSEADDR option
    old_state = sock.getsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR )
    print ("Old sock state: %s" %old_state)

    # Enable the SO_REUSEADDR option
    sock.setsockopt( socket.SOL_SOCKET, socket.SO_REUSEADDR, 1 )
    new_state = sock.getsockopt( socket.SOL_SOCKET, socket.SO_REUSEADDR )
    print ("New sock state: %s" %new_state)

    local_port = 1500
    
    srv = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    srv.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
    srv.bind( ('', local_port) )
    srv.listen(5)
    print("Listening on port: %s " %local_port)
    while True:
        try:
            connection, addr = srv.accept()
            print('Connected by %s:%s' % (addr[0], addr[1]))
            data = connection.recv(data_payload)
            if data:
                print("Data: %s" % data)
                connection.send(data)
                print("sent %s bytes back to %s" % (data, addr))
            # end connection
            connection.close()
        except KeyboardInterrupt:
            break
        except socket.error as msg:
            print('%s' % (msg))

if __name__ == '__main__':
    reuse_socket_addr()