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# Derived from portconquery.py
#
# This file is part of SETools.
#
# SETools is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as
# published by the Free Software Foundation, either version 2.1 of
# the License, or (at your option) any later version.
#
# SETools is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with SETools. If not, see
# <http://www.gnu.org/licenses/>.
#
import logging
from .mixins import MatchContext
from .policyrep import IomemconRange
from .query import PolicyQuery
from .util import match_range
class IomemconQuery(MatchContext, PolicyQuery):
"""
Iomemcon context query.
Parameter:
policy The policy to query.
Keyword Parameters/Class attributes:
addr A 2-tuple of the memory addr range to match. (Set both to
the same value for a single mem addr)
addr_subset If true, the criteria will match if it is a subset
of the iomemcon's range.
addr_overlap If true, the criteria will match if it overlaps
any of the iomemcon's range.
addr_superset If true, the criteria will match if it is a superset
of the iomemcon's range.
addr_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.
"""
_addr = None
addr_subset = False
addr_overlap = False
addr_superset = False
addr_proper = False
@property
def addr(self):
return self._addr
@addr.setter
def addr(self, value):
pending_addr = IomemconRange(*value)
if all(pending_addr):
if pending_addr.low < 1 or pending_addr.high < 1:
raise ValueError("Memory address must be positive: {0.low}-{0.high}".
format(pending_addr))
if pending_addr.low > pending_addr.high:
raise ValueError(
"The low mem addr must be smaller than the high mem addr: {0.low}-{0.high}".
format(pending_addr))
self._addr = pending_addr
else:
self._addr = None
def __init__(self, policy, **kwargs):
super(IomemconQuery, self).__init__(policy, **kwargs)
self.log = logging.getLogger(__name__)
def results(self):
"""Generator which yields all matching iomemcons."""
self.log.info("Generating results from {0.policy}".format(self))
self.log.debug("Address: {0.addr!r}, overlap: {0.addr_overlap}, "
"subset: {0.addr_subset}, superset: {0.addr_superset}, "
"proper: {0.addr_proper}".format(self))
self._match_context_debug(self.log)
for iomemcon in self.policy.iomemcons():
if self.addr and not match_range(
iomemcon.addr,
self.addr,
self.addr_subset,
self.addr_overlap,
self.addr_superset,
self.addr_proper):
continue
if not self._match_context(iomemcon.context):
continue
yield iomemcon