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Editing: ibpkeyconquery.py

# Copyright 2018, Chris PeBenito <pebenito@ieee.org>
#
# SPDX-License-Identifier: LGPL-2.1-only
#
from ipaddress import IPv6Address
import logging
from typing import Iterable, Optional, Tuple, Union

from .mixins import MatchContext
from .policyrep import Ibpkeycon, IbpkeyconRange
from .query import PolicyQuery
from .util import match_range

class IbpkeyconQuery(MatchContext, PolicyQuery):

"""
    Infiniband pkey context query.

Parameter:
    policy          The policy to query.

Keyword Parameters/Class attributes:
    subnet_prefix   A subnet prefix to match.
    pkeys           A 2-tuple of the pkey range to match. (Set both to
                    the same value for a single pkey)
    pkeys_subset    If true, the criteria will match if it is a subset
                    of the ibpkeycon's range.
    pkeys_overlap   If true, the criteria will match if it overlaps
                    any of the ibpkeycon's range.
    pkeys_superset  If true, the criteria will match if it is a superset
                    of the ibpkeycon's range.
    pkeys_proper    If true, use proper superset/subset operations.
                    No effect if not using set operations.
    user            The criteria to match the context's user.
    user_regex      If true, regular expression matching
                    will be used on the user.
    role            The criteria to match the context's role.
    role_regex      If true, regular expression matching
                    will be used on the role.
    type_           The criteria to match the context's type.
    type_regex      If true, regular expression matching
                    will be used on the type.
    range_          The criteria to match the context's range.
    range_subset    If true, the criteria will match if it is a subset
                    of the context's range.
    range_overlap   If true, the criteria will match if it overlaps
                    any of the context's range.
    range_superset  If true, the criteria will match if it is a superset
                    of the context's range.
    range_proper    If true, use proper superset/subset operations.
                    No effect if not using set operations.
    """

_subnet_prefix: Optional[IPv6Address] = None
    _pkeys: Optional[IbpkeyconRange] = None
    pkeys_subset: bool = False
    pkeys_overlap: bool = False
    pkeys_superset: bool = False
    pkeys_proper: bool = False

def __init__(self, policy, **kwargs):
        super(IbpkeyconQuery, self).__init__(policy, **kwargs)
        self.log = logging.getLogger(__name__)

@property
    def pkeys(self) -> Optional[IbpkeyconRange]:
        return self._pkeys

@pkeys.setter
    def pkeys(self, value: Optional[Tuple[int, int]]) -> None:
        if value is not None:
            pending_pkeys = IbpkeyconRange(*value)

if pending_pkeys.low < 1 or pending_pkeys.high < 1:
                raise ValueError("Pkeys must be positive: {0.low:#x}-{0.high:#x}".
                                 format(pending_pkeys))

if pending_pkeys.low > 0xffff or pending_pkeys.high > 0xffff:
                raise ValueError("Pkeys maximum is 0xffff: {0.low:#x}-{0.high:#x}".
                                 format(pending_pkeys))

if pending_pkeys.low > pending_pkeys.high:
                raise ValueError(
                    "The low pkey must be smaller than the high pkey: {0.low:#x}-{0.high:#x}".
                    format(pending_pkeys))

self._pkeys = pending_pkeys
        else:
            self._pkeys = None

@property
    def subnet_prefix(self) -> Optional[IPv6Address]:
        return self._subnet_prefix

@subnet_prefix.setter
    def subnet_prefix(self, value: Optional[Union[str, IPv6Address]]) -> None:
        if value:
            self._subnet_prefix = IPv6Address(value)
        else:
            self._subnet_prefix = None

def results(self) -> Iterable[Ibpkeycon]:
        """Generator which yields all matching ibpkeycons."""
        self.log.info("Generating ibpkeycon results from {0.policy}".format(self))
        self.log.debug("Subnet Prefix: {0.subnet_prefix}".format(self))
        self.log.debug("Pkeys: {0.pkeys}, overlap: {0.pkeys_overlap}, "
                       "subset: {0.pkeys_subset}, superset: {0.pkeys_superset}, "
                       "proper: {0.pkeys_proper}".format(self))
        self._match_context_debug(self.log)

for pk in self.policy.ibpkeycons():
            if self.subnet_prefix is not None and self.subnet_prefix != pk.subnet_prefix:
                continue

if self.pkeys and not match_range(
                    pk.pkeys,
                    self.pkeys,
                    self.pkeys_subset,
                    self.pkeys_overlap,
                    self.pkeys_superset,
                    self.pkeys_proper):
                continue

if not self._match_context(pk.context):
                continue

yield pk

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