netutils.py 文件源码

def get_ipv6_addr_by_EUI64(prefix, mac):
    """Calculate IPv6 address using EUI-64 specification.

    This method calculates the IPv6 address using the EUI-64
    addressing scheme as explained in rfc2373.

    :param prefix: IPv6 prefix.
    :param mac: IEEE 802 48-bit MAC address.
    :returns: IPv6 address on success.
    :raises ValueError, TypeError: For any invalid input.

    .. versionadded:: 1.4
    """
    # Check if the prefix is an IPv4 address
    if is_valid_ipv4(prefix):
        msg = _("Unable to generate IP address by EUI64 for IPv4 prefix")
        raise ValueError(msg)
    try:
        eui64 = int(netaddr.EUI(mac).eui64())
        prefix = netaddr.IPNetwork(prefix)
        return netaddr.IPAddress(prefix.first + eui64 ^ (1 << 57))
    except (ValueError, netaddr.AddrFormatError):
        raise ValueError(_('Bad prefix or mac format for generating IPv6 '
                           'address by EUI-64: %(prefix)s, %(mac)s:')
                         % {'prefix': prefix, 'mac': mac})
    except TypeError:
        raise TypeError(_('Bad prefix type for generating IPv6 address by '
                          'EUI-64: %s') % prefix)