cryptonas/plugins/network/root_action.py

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#!/usr/bin/env python
#
# Copyright 2006 sense.lab e.V.
#
# This file is part of the CryptoBox.
#
# The CryptoBox 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.
#
# The CryptoBox 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 the CryptoBox; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#
__revision__ = "$Id"
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## necessary: otherwise CryptoBoxRootActions.py will refuse to execute this script
PLUGIN_TYPE = "cryptobox"
IFCONFIG_BIN = "/sbin/ifconfig"
ROUTE_BIN = "/sbin/route"
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import subprocess
import re
import sys
def __changeIP(interface, ipaddress, netmask="0"):
__check_address(ipaddress)
if netmask == "0":
## change the IP only
proc = subprocess.Popen(
shell = False,
args = [IFCONFIG_BIN, interface, ipaddress])
proc.wait()
else:
## someone wants to change the netmask too
__check_address(netmask)
proc = subprocess.Popen(
shell = False,
args = [IFCONFIG_BIN, interface, ipaddress, "netmask", netmask])
proc.wait()
return proc.returncode == 0
def __changeGW(old_gw, new_gw):
__check_address(old_gw)
__check_address(new_gw)
if old_gw != "0.0.0.0":
## assume that a default route exists and delete it
proc = subprocess.Popen(
shell = False,
args = [ROUTE_BIN, "del", "default", "gw", old_gw])
proc.wait()
## ignore errors
proc = subprocess.Popen(
shell = False,
args = [ROUTE_BIN, "add", "default", "gw", new_gw])
proc.wait()
return proc.returncode == 0
def __check_address(address):
"""Check for correct numbers in given address
"""
match = re.search(r'^(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})$', address)
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## did we match? If yes, then: are there wrong values inside?
if not match or [e for e in match.groups() if int(e) > 255]:
sys.stderr.write("%s: illegal argument (%s)\n" % (self_bin, address))
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sys.exit(1)
return
if __name__ == "__main__":
args = sys.argv[1:]
self_bin = sys.argv[0]
if len(args) == 0:
sys.stderr.write("%s: no argument supplied\n" % self_bin)
sys.exit(1)
try:
if args[0] == "change_ip":
if len(args) != 4: raise "InvalidArgNum"
result = __changeIP(args[1], args[2], args[3])
elif args[0] == "change_gw":
if len(args) != 3: raise "InvalidArgNum"
result = __changeGW(args[1], args[2])
else:
sys.stderr.write("%s: invalid action (%s)\n" % (self_bin, args[0]))
sys.exit(1)
if result:
sys.exit(0)
else:
sys.exit(1)
except "InvalidArgNum":
sys.stderr.write("%s: invalid number of arguments (%s)\n" % (self_bin, args))
sys.exit(1)