account_identifier.py 文件源码

def to_global(prefix, mac, project_id):
    project_hash = netaddr.IPAddress(
                   int(hashlib.sha1(project_id).hexdigest()[:8], 16) << 32)
    static_num = netaddr.IPAddress(0xff << 24)

    try:
        mac_suffix = netaddr.EUI(mac).words[3:]
        int_addr = int(''.join(['%02x' % i for i in mac_suffix]), 16)
        mac_addr = netaddr.IPAddress(int_addr)
        maskIP = netaddr.IPNetwork(prefix).ip
        return (project_hash ^ static_num ^ mac_addr | maskIP).format()
    except netaddr.AddrFormatError:
        raise TypeError(_('Bad mac for to_global_ipv6: %s') % mac)
    except TypeError:
        raise TypeError(_('Bad prefix for to_global_ipv6: %s') % prefix)
    except NameError:
        raise TypeError(_('Bad project_id for to_global_ipv6: %s') %
                        project_id)