#!/usr/bin/env python

def check_access(access_type=4):
    """Check if external address is allowed given access_type:
    1=nzb
    2=api
    3=full_api
    4=webui
    5=webui with login for external
    """
    referrer = cherrypy.request.remote.ip

    # CherryPy will report ::ffff:192.168.0.10 on dual-stack situation
    # It will always contain that ::ffff: prefix

    # Standardize input

    for r in cfg.local_ranges():
        if "/" in r:
            prefix, suffix = r.split("/")
            

    def cidr_to_netmask(cidr):
        cidr = int(cidr)
        mask = (0xffffffff >> (32 - cidr)) << (32 - cidr)
        return (str( (0xff000000 & mask) >> 24)   + '.' +
                str( (0x00ff0000 & mask) >> 16)   + '.' +
                str( (0x0000ff00 & mask) >> 8)    + '.' +
                str( (0x000000ff & mask)))
            


    range_ok = not cfg.local_ranges() or bool(
        [1 for r in cfg.local_ranges() if (referrer.startswith(r) or referrer.replace("::ffff:", "").startswith(r))]
    )
    allowed = referrer in ("127.0.0.1", "::ffff:127.0.0.1", "::1") or range_ok or access_type <= cfg.inet_exposure()
    if not allowed:
        logging.debug("Refused connection from %s", referrer)
    return allowed


def convert_cidr(ip,mask):
    network = ''
    iOctets = ip.split('.')
    mOctets = mask.split('.')
    network = str( int( iOctets[0] ) & int(mOctets[0] ) ) + '.'
    network += str( int( iOctets[1] ) & int(mOctets[1] ) ) + '.'
    network += str( int( iOctets[2] ) & int(mOctets[2] ) ) + '.'
    network += str( int( iOctets[3] ) & int(mOctets[3] ) )
    return network