The minimum/maximum value to be generated. The minimum should not
be below 49152 and the maximum should not exceed 65536 (see
details).
max_tries
The maximum number of times a random port will be searched for.
Details
By definition, a TCP port is an unsigned short, and so it can not
exceed 65535. Additionally, ports in the range 1024 to 49151 are
(possibly) registered by ICANN for specific uses.
random_port() will simply generate a valid, non-registered
tcp port. random_unused_port() will generate a port
that is available for socket connections.
random_open_port() finds a random port not already bound
to an endpoint.