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# Copyright (C) Dnspython Contributors, see LICENSE for text of ISC license

import struct

import dns.immutable
import dns.rdata


@dns.immutable.immutable
class L32(dns.rdata.Rdata):
    """L32 record"""

    # see: rfc6742.txt

    __slots__ = ["preference", "locator32"]

    def __init__(self, rdclass, rdtype, preference, locator32):
        super().__init__(rdclass, rdtype)
        self.preference = self._as_uint16(preference)
        self.locator32 = self._as_ipv4_address(locator32)

    def to_text(self, origin=None, relativize=True, **kw):
        return f"{self.preference} {self.locator32}"

    @classmethod
    def from_text(
        cls, rdclass, rdtype, tok, origin=None, relativize=True, relativize_to=None
    ):
        preference = tok.get_uint16()
        nodeid = tok.get_identifier()
        return cls(rdclass, rdtype, preference, nodeid)

    def _to_wire(self, file, compress=None, origin=None, canonicalize=False):
        file.write(struct.pack("!H", self.preference))
        file.write(dns.ipv4.inet_aton(self.locator32))

    @classmethod
    def from_wire_parser(cls, rdclass, rdtype, parser, origin=None):
        preference = parser.get_uint16()
        locator32 = parser.get_remaining()
        return cls(rdclass, rdtype, preference, locator32)