FM / dns

/usr/lib/python3.9/site-packages/dns

Name	Size	Mode	Actions
dnssecalgs/	-	0755	rm
quic/	-	0755	rm
rdtypes/	-	0755	rm
__pycache__/	-	0755	rm
asyncbackend.py	2796	0644	edit dl rm
asyncquery.py	26850	0644	edit dl rm
asyncresolver.py	17852	0644	edit dl rm
dnssec.py	40693	0644	edit dl rm
dnssectypes.py	1799	0644	edit dl rm
e164.py	3978	0644	edit dl rm
edns.py	15263	0644	edit dl rm
entropy.py	4242	0644	edit dl rm
enum.py	3691	0644	edit dl rm
exception.py	5957	0644	edit dl rm
flags.py	2750	0644	edit dl rm
grange.py	2148	0644	edit dl rm
immutable.py	2017	0644	edit dl rm
inet.py	5772	0644	edit dl rm
ipv4.py	2552	0644	edit dl rm
ipv6.py	6600	0644	edit dl rm
message.py	65993	0644	edit dl rm
name.py	42672	0644	edit dl rm
namedict.py	4000	0644	edit dl rm
nameserver.py	9909	0644	edit dl rm
node.py	12663	0644	edit dl rm
opcode.py	2730	0644	edit dl rm
query.py	54832	0644	edit dl rm
rcode.py	4156	0644	edit dl rm
rdata.py	29456	0644	edit dl rm
rdataclass.py	2984	0644	edit dl rm
rdataset.py	16756	0644	edit dl rm
rdatatype.py	7339	0644	edit dl rm
renderer.py	11254	0644	edit dl rm
resolver.py	73552	0644	edit dl rm
reversename.py	3828	0644	edit dl rm
rrset.py	9170	0644	edit dl rm
serial.py	3606	0644	edit dl rm
set.py	9088	0644	edit dl rm
tokenizer.py	23583	0644	edit dl rm
transaction.py	22636	0644	edit dl rm
tsig.py	11413	0644	edit dl rm
tsigkeyring.py	2633	0644	edit dl rm
ttl.py	2979	0644	edit dl rm
update.py	12243	0644	edit dl rm
version.py	1926	0644	edit dl rm
versioned.py	11765	0644	edit dl rm
win32util.py	9107	0644	edit dl rm
wire.py	2830	0644	edit dl rm
xfr.py	13273	0644	edit dl rm
zone.py	52086	0644	edit dl rm
zonefile.py	27929	0644	edit dl rm
zonetypes.py	690	0644	edit dl rm
_asyncbackend.py	2360	0644	edit dl rm
_asyncio_backend.py	8971	0644	edit dl rm
_ddr.py	5247	0644	edit dl rm
_features.py	2384	0644	edit dl rm
_immutable_ctx.py	2459	0644	edit dl rm
__init__.py	1663	0644	edit dl rm

Edit: /usr/lib/python3.9/site-packages/dns/update.py (12243B)

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

# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
#
# Permission to use, copy, modify, and distribute this software and its
# documentation for any purpose with or without fee is hereby granted,
# provided that the above copyright notice and this permission notice
# appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

"""DNS Dynamic Update Support"""

from typing import Any, List, Optional, Union

import dns.message
import dns.name
import dns.opcode
import dns.rdata
import dns.rdataclass
import dns.rdataset
import dns.rdatatype
import dns.tsig

class UpdateSection(dns.enum.IntEnum):
    """Update sections"""

ZONE = 0
    PREREQ = 1
    UPDATE = 2
    ADDITIONAL = 3

@classmethod
    def _maximum(cls):
        return 3

class UpdateMessage(dns.message.Message):  # lgtm[py/missing-equals]
    # ignore the mypy error here as we mean to use a different enum
    _section_enum = UpdateSection  # type: ignore

def __init__(
        self,
        zone: Optional[Union[dns.name.Name, str]] = None,
        rdclass: dns.rdataclass.RdataClass = dns.rdataclass.IN,
        keyring: Optional[Any] = None,
        keyname: Optional[dns.name.Name] = None,
        keyalgorithm: Union[dns.name.Name, str] = dns.tsig.default_algorithm,
        id: Optional[int] = None,
    ):
        """Initialize a new DNS Update object.

See the documentation of the Message class for a complete
        description of the keyring dictionary.

*zone*, a ``dns.name.Name``, ``str``, or ``None``, the zone
        which is being updated.  ``None`` should only be used by dnspython's
        message constructors, as a zone is required for the convenience
        methods like ``add()``, ``replace()``, etc.

*rdclass*, an ``int`` or ``str``, the class of the zone.

The *keyring*, *keyname*, and *keyalgorithm* parameters are passed to
        ``use_tsig()``; see its documentation for details.
        """
        super().__init__(id=id)
        self.flags |= dns.opcode.to_flags(dns.opcode.UPDATE)
        if isinstance(zone, str):
            zone = dns.name.from_text(zone)
        self.origin = zone
        rdclass = dns.rdataclass.RdataClass.make(rdclass)
        self.zone_rdclass = rdclass
        if self.origin:
            self.find_rrset(
                self.zone,
                self.origin,
                rdclass,
                dns.rdatatype.SOA,
                create=True,
                force_unique=True,
            )
        if keyring is not None:
            self.use_tsig(keyring, keyname, algorithm=keyalgorithm)

@property
    def zone(self) -> List[dns.rrset.RRset]:
        """The zone section."""
        return self.sections[0]

@zone.setter
    def zone(self, v):
        self.sections[0] = v

@property
    def prerequisite(self) -> List[dns.rrset.RRset]:
        """The prerequisite section."""
        return self.sections[1]

@prerequisite.setter
    def prerequisite(self, v):
        self.sections[1] = v

@property
    def update(self) -> List[dns.rrset.RRset]:
        """The update section."""
        return self.sections[2]

@update.setter
    def update(self, v):
        self.sections[2] = v

def _add_rr(self, name, ttl, rd, deleting=None, section=None):
        """Add a single RR to the update section."""

if section is None:
            section = self.update
        covers = rd.covers()
        rrset = self.find_rrset(
            section, name, self.zone_rdclass, rd.rdtype, covers, deleting, True, True
        )
        rrset.add(rd, ttl)

def _add(self, replace, section, name, *args):
        """Add records.

*replace* is the replacement mode.  If ``False``,
        RRs are added to an existing RRset; if ``True``, the RRset
        is replaced with the specified contents.  The second
        argument is the section to add to.  The third argument
        is always a name.  The other arguments can be:

- rdataset...

- ttl, rdata...

- ttl, rdtype, string...
        """

if isinstance(name, str):
            name = dns.name.from_text(name, None)
        if isinstance(args[0], dns.rdataset.Rdataset):
            for rds in args:
                if replace:
                    self.delete(name, rds.rdtype)
                for rd in rds:
                    self._add_rr(name, rds.ttl, rd, section=section)
        else:
            args = list(args)
            ttl = int(args.pop(0))
            if isinstance(args[0], dns.rdata.Rdata):
                if replace:
                    self.delete(name, args[0].rdtype)
                for rd in args:
                    self._add_rr(name, ttl, rd, section=section)
            else:
                rdtype = dns.rdatatype.RdataType.make(args.pop(0))
                if replace:
                    self.delete(name, rdtype)
                for s in args:
                    rd = dns.rdata.from_text(self.zone_rdclass, rdtype, s, self.origin)
                    self._add_rr(name, ttl, rd, section=section)

def add(self, name: Union[dns.name.Name, str], *args: Any) -> None:
        """Add records.

The first argument is always a name.  The other
        arguments can be:

- rdataset...

- ttl, rdata...

- ttl, rdtype, string...
        """

self._add(False, self.update, name, *args)

def delete(self, name: Union[dns.name.Name, str], *args: Any) -> None:
        """Delete records.

The first argument is always a name.  The other
        arguments can be:

- *empty*

- rdataset...

- rdata...

- rdtype, [string...]
        """

if isinstance(name, str):
            name = dns.name.from_text(name, None)
        if len(args) == 0:
            self.find_rrset(
                self.update,
                name,
                dns.rdataclass.ANY,
                dns.rdatatype.ANY,
                dns.rdatatype.NONE,
                dns.rdataclass.ANY,
                True,
                True,
            )
        elif isinstance(args[0], dns.rdataset.Rdataset):
            for rds in args:
                for rd in rds:
                    self._add_rr(name, 0, rd, dns.rdataclass.NONE)
        else:
            largs = list(args)
            if isinstance(largs[0], dns.rdata.Rdata):
                for rd in largs:
                    self._add_rr(name, 0, rd, dns.rdataclass.NONE)
            else:
                rdtype = dns.rdatatype.RdataType.make(largs.pop(0))
                if len(largs) == 0:
                    self.find_rrset(
                        self.update,
                        name,
                        self.zone_rdclass,
                        rdtype,
                        dns.rdatatype.NONE,
                        dns.rdataclass.ANY,
                        True,
                        True,
                    )
                else:
                    for s in largs:
                        rd = dns.rdata.from_text(
                            self.zone_rdclass,
                            rdtype,
                            s,  # type: ignore[arg-type]
                            self.origin,
                        )
                        self._add_rr(name, 0, rd, dns.rdataclass.NONE)

def replace(self, name: Union[dns.name.Name, str], *args: Any) -> None:
        """Replace records.

The first argument is always a name.  The other
        arguments can be:

- rdataset...

- ttl, rdata...

- ttl, rdtype, string...

Note that if you want to replace the entire node, you should do
        a delete of the name followed by one or more calls to add.
        """

self._add(True, self.update, name, *args)

def present(self, name: Union[dns.name.Name, str], *args: Any) -> None:
        """Require that an owner name (and optionally an rdata type,
        or specific rdataset) exists as a prerequisite to the
        execution of the update.

The first argument is always a name.
        The other arguments can be:

- rdataset...

- rdata...

- rdtype, string...
        """

if isinstance(name, str):
            name = dns.name.from_text(name, None)
        if len(args) == 0:
            self.find_rrset(
                self.prerequisite,
                name,
                dns.rdataclass.ANY,
                dns.rdatatype.ANY,
                dns.rdatatype.NONE,
                None,
                True,
                True,
            )
        elif (
            isinstance(args[0], dns.rdataset.Rdataset)
            or isinstance(args[0], dns.rdata.Rdata)
            or len(args) > 1
        ):
            if not isinstance(args[0], dns.rdataset.Rdataset):
                # Add a 0 TTL
                largs = list(args)
                largs.insert(0, 0)  # type: ignore[arg-type]
                self._add(False, self.prerequisite, name, *largs)
            else:
                self._add(False, self.prerequisite, name, *args)
        else:
            rdtype = dns.rdatatype.RdataType.make(args[0])
            self.find_rrset(
                self.prerequisite,
                name,
                dns.rdataclass.ANY,
                rdtype,
                dns.rdatatype.NONE,
                None,
                True,
                True,
            )

def absent(
        self,
        name: Union[dns.name.Name, str],
        rdtype: Optional[Union[dns.rdatatype.RdataType, str]] = None,
    ) -> None:
        """Require that an owner name (and optionally an rdata type) does
        not exist as a prerequisite to the execution of the update."""

if isinstance(name, str):
            name = dns.name.from_text(name, None)
        if rdtype is None:
            self.find_rrset(
                self.prerequisite,
                name,
                dns.rdataclass.NONE,
                dns.rdatatype.ANY,
                dns.rdatatype.NONE,
                None,
                True,
                True,
            )
        else:
            rdtype = dns.rdatatype.RdataType.make(rdtype)
            self.find_rrset(
                self.prerequisite,
                name,
                dns.rdataclass.NONE,
                rdtype,
                dns.rdatatype.NONE,
                None,
                True,
                True,
            )

def _get_one_rr_per_rrset(self, value):
        # Updates are always one_rr_per_rrset
        return True

def _parse_rr_header(self, section, name, rdclass, rdtype):
        deleting = None
        empty = False
        if section == UpdateSection.ZONE:
            if (
                dns.rdataclass.is_metaclass(rdclass)
                or rdtype != dns.rdatatype.SOA
                or self.zone
            ):
                raise dns.exception.FormError
        else:
            if not self.zone:
                raise dns.exception.FormError
            if rdclass in (dns.rdataclass.ANY, dns.rdataclass.NONE):
                deleting = rdclass
                rdclass = self.zone[0].rdclass
                empty = (
                    deleting == dns.rdataclass.ANY or section == UpdateSection.PREREQ
                )
        return (rdclass, rdtype, deleting, empty)

# backwards compatibility
Update = UpdateMessage

### BEGIN generated UpdateSection constants

ZONE = UpdateSection.ZONE
PREREQ = UpdateSection.PREREQ
UPDATE = UpdateSection.UPDATE
ADDITIONAL = UpdateSection.ADDITIONAL

### END generated UpdateSection constants

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