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# Derived from netcontext.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/>.
#
from collections import namedtuple
from . import qpol
from . import symbol
from . import context
addr_range = namedtuple("memory_range", ["low", "high"])
port_range = namedtuple("port_range", ["low", "high"])
def iomemcon_factory(policy, name):
"""Factory function for creating iomemcon objects."""
if not isinstance(name, qpol.qpol_iomemcon_t):
raise NotImplementedError
return Iomemcon(policy, name)
def ioportcon_factory(policy, name):
"""Factory function for creating ioportcon objects."""
if not isinstance(name, qpol.qpol_ioportcon_t):
raise NotImplementedError
return Ioportcon(policy, name)
def pirqcon_factory(policy, name):
"""Factory function for creating pirqcon objects."""
if not isinstance(name, qpol.qpol_pirqcon_t):
raise NotImplementedError
return Pirqcon(policy, name)
def pcidevicecon_factory(policy, name):
"""Factory function for creating pcidevicecon objects."""
if not isinstance(name, qpol.qpol_pcidevicecon_t):
raise NotImplementedError
return Pcidevicecon(policy, name)
def devicetreecon_factory(policy, name):
"""Factory function for creating devicetreecon objects."""
if not isinstance(name, qpol.qpol_devicetreecon_t):
raise NotImplementedError
return Devicetreecon(policy, name)
class XenContext(symbol.PolicySymbol):
"""Base class for in-policy xen labeling rules."""
def __str__(self):
raise NotImplementedError
@property
def context(self):
"""The context for this statement."""
return context.context_factory(self.policy, self.qpol_symbol.context(self.policy))
def statement(self):
return str(self)
class Iomemcon(XenContext):
"""A iomemcon statement."""
def __str__(self):
low, high = self.addr
if low == high:
return "iomemcon {0} {1}".format(low, self.context)
else:
return "iomemcon {0}-{1} {2}".format(low, high, self.context)
@property
def addr(self):
"""
The memory range for this iomemcon.
Return: Tuple(low, high)
low The low memory of the range.
high The high memory of the range.
"""
low = self.qpol_symbol.low_addr(self.policy)
high = self.qpol_symbol.high_addr(self.policy)
return addr_range(low, high)
class Ioportcon(XenContext):
"""A ioportcon statement."""
def __str__(self):
low, high = self.ports
if low == high:
return "ioportcon {0} {1}".format(low, self.context)
else:
return "ioportcon {0}-{1} {2}".format(low, high, self.context)
@property
def ports(self):
"""
The port range for this ioportcon.
Return: Tuple(low, high)
low The low port of the range.
high The high port of the range.
"""
low = self.qpol_symbol.low_port(self.policy)
high = self.qpol_symbol.high_port(self.policy)
return port_range(low, high)
class Pcidevicecon(XenContext):
"""A pcidevicecon statement."""
def __str__(self):
return "pcidevicecon {0.device} {0.context}".format(self)
@property
def device(self):
"""
The device for this pcidevicecon.
Return: The PCI device ID.
"""
return self.qpol_symbol.device(self.policy)
class Pirqcon(XenContext):
"""A pirqcon statement."""
def __str__(self):
return "pirqcon {0.irq} {0.context}".format(self)
@property
def irq(self):
"""
The irq for this pirqcon.
Return: The irq.
"""
return self.qpol_symbol.irq(self.policy)
class Devicetreecon(XenContext):
"""A devicetreecon statement."""
def __str__(self):
return "devicetreecon {0.path} {0.context}".format(self)
@property
def path(self):
"""
The path for this devicetreecon.
Return: The device path name.
"""
return self.qpol_symbol.path(self.policy)
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