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Edit File : modules.py \| Size : 3.73 KB
# -- coding: utf-8 -- # # Copyright (C) 2010-2016 Red Hat, Inc. # # Authors: # Thomas Woerner <twoerner@redhat.com> # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; either version 2 of the License, or # (at your option) any later version. # # This program 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 General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program. If not, see <http://www.gnu.org/licenses/>. # """modules backend""" __all__ = [ "modules" ] from firewall.core.prog import runProg from firewall.core.logger import log from firewall.config import COMMANDS class modules(object): def __init__(self): self._load_command = COMMANDS["modprobe"] # Use rmmod instead of modprobe -r (RHBZ#1031102) self._unload_command = COMMANDS["rmmod"] def __repr__(self): return '%s' % (self.__class__) def loaded_modules(self): """ get all loaded kernel modules and their dependencies """ mods = [ ] deps = { } try: with open("/proc/modules", "r") as f: for line in f: if not line: break line = line.strip() splits = line.split() mods.append(splits[0]) if splits[3] != "-": deps[splits[0]] = splits[3].split(",")[:-1] else: deps[splits[0]] = [ ] except FileNotFoundError: pass return mods, deps # [loaded modules], {module:[dependants]} def load_module(self, module): log.debug2("%s: %s %s", self.__class__, self._load_command, module) return runProg(self._load_command, [ module ]) def unload_module(self, module): log.debug2("%s: %s %s", self.__class__, self._unload_command, module) return runProg(self._unload_command, [ module ]) def get_deps(self, module, deps, ret): """ get all dependants of a module """ if module not in deps: return for mod in deps[module]: self.get_deps(mod, deps, ret) if mod not in ret: ret.append(mod) if module not in ret: ret.append(module) def get_firewall_modules(self): """ get all loaded firewall-related modules """ mods = [ ] (mods2, deps) = self.loaded_modules() self.get_deps("nf_conntrack", deps, mods) # these modules don't have dependants listed in /proc/modules for bad_bad_module in ["nf_conntrack_ipv4", "nf_conntrack_ipv6"]: if bad_bad_module in mods: # move them to end of list, so we'll remove them later mods.remove(bad_bad_module) mods.insert(-1, bad_bad_module) for mod in mods2: if mod in [ "ip_tables", "ip6_tables", "ebtables" ] or \ mod.startswith("iptable_") or mod.startswith("ip6table_") or \ mod.startswith("nf_") or mod.startswith("xt_") or \ mod.startswith("ipt_") or mod.startswith("ip6t_") : self.get_deps(mod, deps, mods) return mods def unload_firewall_modules(self): """ unload all firewall-related modules """ for module in self.get_firewall_modules(): (status, ret) = self.unload_module(module) if status != 0: log.debug1("Failed to unload module '%s': %s" %(module, ret)) Back

Edit File : modules.py | Size : 3.73 KB

# -*- coding: utf-8 -*-
#
# Copyright (C) 2010-2016 Red Hat, Inc.
#
# Authors:
# Thomas Woerner <twoerner@redhat.com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#

"""modules backend"""

__all__ = [ "modules" ]

from firewall.core.prog import runProg
from firewall.core.logger import log
from firewall.config import COMMANDS

class modules(object):
    def __init__(self):
        self._load_command = COMMANDS["modprobe"]
        # Use rmmod instead of modprobe -r (RHBZ#1031102)
        self._unload_command = COMMANDS["rmmod"]

def __repr__(self):
        return '%s' % (self.__class__)

def loaded_modules(self):
        """ get all loaded kernel modules and their dependencies """
        mods = [ ]
        deps = { }
        try:
            with open("/proc/modules", "r") as f:
                for line in f:
                    if not line:
                        break
                    line = line.strip()
                    splits = line.split()
                    mods.append(splits[0])
                    if splits[3] != "-":
                        deps[splits[0]] = splits[3].split(",")[:-1]
                    else:
                        deps[splits[0]] = [ ]
        except FileNotFoundError:
            pass

return mods, deps # [loaded modules], {module:[dependants]}

def load_module(self, module):
        log.debug2("%s: %s %s", self.__class__, self._load_command, module)
        return runProg(self._load_command, [ module ])

def unload_module(self, module):
        log.debug2("%s: %s %s", self.__class__, self._unload_command, module)
        return runProg(self._unload_command, [ module ])

def get_deps(self, module, deps, ret):
        """ get all dependants of a module """
        if module not in deps:
            return
        for mod in deps[module]:
            self.get_deps(mod, deps, ret)
            if mod not in ret:
                ret.append(mod)
        if module not in ret:
            ret.append(module)

def get_firewall_modules(self):
        """ get all loaded firewall-related modules """
        mods = [ ]
        (mods2, deps) = self.loaded_modules()

self.get_deps("nf_conntrack", deps, mods)
        # these modules don't have dependants listed in /proc/modules
        for bad_bad_module in ["nf_conntrack_ipv4", "nf_conntrack_ipv6"]:
            if bad_bad_module in mods:
                # move them to end of list, so we'll remove them later
                mods.remove(bad_bad_module)
                mods.insert(-1, bad_bad_module)

for mod in mods2:
            if mod in [ "ip_tables", "ip6_tables", "ebtables" ] or \
               mod.startswith("iptable_") or mod.startswith("ip6table_") or \
               mod.startswith("nf_") or mod.startswith("xt_") or \
               mod.startswith("ipt_") or mod.startswith("ip6t_") :
                self.get_deps(mod, deps, mods)
        return mods

def unload_firewall_modules(self):
        """ unload all firewall-related modules """
        for module in self.get_firewall_modules():
            (status, ret) = self.unload_module(module)
            if status != 0:
                log.debug1("Failed to unload module '%s': %s" %(module, ret))

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