#!/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__ = "$Id" ## necessary: otherwise CryptoBoxRootActions.py will refuse to execute this script PLUGIN_TYPE = "cryptobox" IFCONFIG_BIN = "/sbin/ifconfig" ROUTE_BIN = "/sbin/route" import subprocess import re import sys def __changeIP(interface, ipaddress, netmask="0"): __check_address(ipaddress) if netmask == "0": ## change the IP only proc = subprocess.Popen( shell = False, args = [IFCONFIG_BIN, interface, ipaddress]) proc.wait() else: ## someone wants to change the netmask too __check_address(netmask) proc = subprocess.Popen( shell = False, args = [IFCONFIG_BIN, interface, ipaddress, "netmask", netmask]) proc.wait() return proc.returncode == 0 def __changeGW(old_gw, new_gw): __check_address(old_gw) __check_address(new_gw) if old_gw != "0.0.0.0": ## assume that a default route exists and delete it proc = subprocess.Popen( shell = False, args = [ROUTE_BIN, "del", "default", "gw", old_gw]) proc.wait() ## ignore errors proc = subprocess.Popen( shell = False, args = [ROUTE_BIN, "add", "default", "gw", new_gw]) proc.wait() return proc.returncode == 0 def __check_address(address): """Check for correct numbers in given address """ match = re.search(r'^(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})$', address) ## 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)) 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)