def netstat():
    '''
    Return information on open ports and states

    .. note::
        On BSD minions, the output contains PID info (where available) for each
        netstat entry, fetched from sockstat/fstat output.

    .. versionchanged:: 2014.1.4
        Added support for OpenBSD, FreeBSD, and NetBSD

    .. versionchanged:: 2015.8.0
        Added support for SunOS

    .. versionchanged:: 2016.11.4
        Added support for AIX

    CLI Example:

    .. code-block:: bash

        salt '*' network.netstat
    '''
    if __grains__['kernel'] == 'Linux':
        if not salt.utils.path.which('netstat'):
            return _ss_linux()
        else:
            return _netstat_linux()
    elif __grains__['kernel'] in ('OpenBSD', 'FreeBSD', 'NetBSD'):
        return _netstat_bsd()
    elif __grains__['kernel'] == 'SunOS':
        return _netstat_sunos()
    elif __grains__['kernel'] == 'AIX':
        return _netstat_aix()
    raise CommandExecutionError('Not yet supported on this platform')