mirror of
https://gitlab.com/shorewall/code.git
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1245 lines
30 KiB
Bash
1245 lines
30 KiB
Bash
#!/bin/sh
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#
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# Shorewall6 4.2-- /usr/share/shorewall/lib.base
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#
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# This program is under GPL [http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt]
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#
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# (c) 1999,2000,2001,2002,2003,2004,2005,2006,2007,2008 - Tom Eastep (teastep@shorewall.net)
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#
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# Complete documentation is available at http://shorewall.net
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of Version 2 of the GNU General Public License
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# as published by the Free Software Foundation.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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#
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# This library contains the code common to all Shorewall components.
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#
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# - It is loaded by /sbin/shorewall.
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# - It is loaded by /usr/share/shorewall/firewall.
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# - It is loaded by /usr/share/shorewall-shell/compiler.
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# - It is released as part of Shorewall Lite where it is used by /sbin/shorewall-lite
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# and /usr/share/shorewall-lite/shorecap.
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# - It is released as part of Shorewall Perl where it is copied into the compiled script
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# by the compiler.
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#
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SHOREWALL_LIBVERSION=40407
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SHOREWALL_CAPVERSION=40408
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[ -n "${VARDIR:=/var/lib/shorewall6}" ]
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[ -n "${SHAREDIR:=/usr/share/shorewall6}" ]
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[ -n "${CONFDIR:=/etc/shorewall6}" ]
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[ -n "${PERLSHAREDIR:=/usr/share/shorewall}" ]
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#
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# Message to stderr
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#
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error_message() # $* = Error Message
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{
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echo " $@" >&2
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}
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#
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# Conditionally produce message
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#
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progress_message() # $* = Message
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{
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local timestamp
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timestamp=
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if [ $VERBOSITY -gt 1 ]; then
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[ -n "$g_timestamp" ] && timestamp="$(date +%H:%M:%S) "
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echo "${timestamp}$@"
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fi
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}
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progress_message2() # $* = Message
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{
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local timestamp
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timestamp=
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if [ $VERBOSITY -gt 0 ]; then
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[ -n "$g_timestamp" ] && timestamp="$(date +%H:%M:%S) "
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echo "${timestamp}$@"
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fi
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}
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progress_message3() # $* = Message
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{
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local timestamp
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timestamp=
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if [ $VERBOSITY -ge 0 ]; then
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[ -n "$g_timestamp" ] && timestamp="$(date +%H:%M:%S) "
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echo "${timestamp}$@"
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fi
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}
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#
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# Split a colon-separated list into a space-separated list
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#
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split() {
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local ifs
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ifs=$IFS
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IFS=:
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echo $*
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IFS=$ifs
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}
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#
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# Search a list looking for a match -- returns zero if a match found
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# 1 otherwise
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#
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list_search() # $1 = element to search for , $2-$n = list
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{
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local e
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e=$1
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while [ $# -gt 1 ]; do
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shift
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[ "x$e" = "x$1" ] && return 0
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done
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return 1
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}
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#
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# Undo the effect of 'separate_list()'
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#
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combine_list()
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{
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local f
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local o
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o=
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for f in $* ; do
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o="${o:+$o,}$f"
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done
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echo $o
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}
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#
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# Suppress all output for a command
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#
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qt()
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{
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"$@" >/dev/null 2>&1
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}
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#
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# Determine if Shorewall is "running"
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#
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shorewall6_is_started() {
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qt $IP6TABLES -L shorewall -n
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}
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#
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# Echos the fully-qualified name of the calling shell program
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#
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my_pathname() {
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cd $(dirname $0)
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echo $PWD/$(basename $0)
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}
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#
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# Source a user exit file if it exists
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#
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run_user_exit() # $1 = file name
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{
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local user_exit
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user_exit=$(find_file $1)
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if [ -f $user_exit ]; then
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progress_message "Processing $user_exit ..."
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. $user_exit
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fi
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}
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#
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# Set a standard chain's policy
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#
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setpolicy() # $1 = name of chain, $2 = policy
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{
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run_iptables -P $1 $2
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}
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#
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# Set a standard chain to enable established and related connections
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#
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setcontinue() # $1 = name of chain
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{
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run_iptables -A $1 -m state --state ESTABLISHED,RELATED -j ACCEPT
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}
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#
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# Flush one of the NAT table chains
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#
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flushnat() # $1 = name of chain
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{
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run_iptables -t nat -F $1
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}
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#
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# Flush one of the Mangle table chains
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#
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flushmangle() # $1 = name of chain
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{
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run_iptables -t mangle -F $1
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}
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#
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# Flush and delete all user-defined chains in the filter table
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#
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deleteallchains() {
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run_iptables -F
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run_iptables -X
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}
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#
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# Load a Kernel Module -- assumes that the variable 'moduledirectories' contains
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# a space-separated list of directories to search for
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# the module and that 'moduleloader' contains the
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# module loader command.
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#
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loadmodule() # $1 = module name, $2 - * arguments
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{
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local modulename
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modulename=$1
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local modulefile
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local suffix
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if ! list_search $modulename $MODULES $DONT_LOAD ; then
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shift
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for suffix in $MODULE_SUFFIX ; do
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for directory in $moduledirectories; do
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modulefile=$directory/${modulename}.${suffix}
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if [ -f $modulefile ]; then
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case $moduleloader in
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insmod)
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insmod $modulefile $*
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;;
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*)
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modprobe $modulename $*
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;;
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esac
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break 2
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fi
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done
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done
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fi
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}
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#
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# Reload the Modules
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#
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reload_kernel_modules() {
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local save_modules_dir
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save_modules_dir=$MODULESDIR
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local directory
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local moduledirectories
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moduledirectories=
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local moduleloader
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moduleloader=modprobe
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if ! qt mywhich modprobe; then
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moduleloader=insmod
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fi
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[ -n "${MODULE_SUFFIX:=o gz ko o.gz ko.gz}" ]
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[ -z "$MODULESDIR" ] && MODULESDIR=/lib/modules/$(uname -r)/kernel/net/ipv6/netfilter:/lib/modules/$(uname -r)/kernel/net/netfilter:/lib/modules/$(uname -r)/kernel/net/sched
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MODULES=$(lsmod | cut -d ' ' -f1)
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for directory in $(split $MODULESDIR); do
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[ -d $directory ] && moduledirectories="$moduledirectories $directory"
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done
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[ -n "$moduledirectories" ] && while read command; do
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eval $command
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done
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MODULESDIR=$save_modules_dir
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}
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#
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# Load kernel modules required for Shorewall
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#
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load_kernel_modules() # $1 = Yes, if we are to save moduleinfo in $VARDIR
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{
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local save_modules_dir
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save_modules_dir=$MODULESDIR
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local directory
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local moduledirectories
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moduledirectories=
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local moduleloader
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moduleloader=modprobe
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local savemoduleinfo
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savemoduleinfo=${1:-Yes} # So old compiled scripts still work
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if ! qt mywhich modprobe; then
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moduleloader=insmod
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fi
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[ -n "${MODULE_SUFFIX:=o gz ko o.gz ko.gz}" ]
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[ -z "$MODULESDIR" ] && \
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MODULESDIR=/lib/modules/$(uname -r)/kernel/net/ipv6/netfilter:/lib/modules/$(uname -r)/kernel/net/netfilter:/lib/modules/$(uname -r)/kernel/net/sched
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for directory in $(split $MODULESDIR); do
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[ -d $directory ] && moduledirectories="$moduledirectories $directory"
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done
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[ -n "$LOAD_HELPERS_ONLY" ] && modules=$(find_file helpers) || modules=$(find_file modules)
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if [ -f $modules -a -n "$moduledirectories" ]; then
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MODULES=$(lsmod | cut -d ' ' -f1)
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progress_message "Loading Modules..."
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. $modules
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if [ $savemoduleinfo = Yes ]; then
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[ -d ${VARDIR} ] || mkdir -p ${VARDIR}
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echo MODULESDIR="$MODULESDIR" > ${VARDIR}/.modulesdir
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cp -f $modules ${VARDIR}/.modules
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fi
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elif [ $savemoduleinfo = Yes ]; then
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[ -d ${VARDIR} ] || mkdir -p ${VARDIR}
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> ${VARDIR}/.modulesdir
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> ${VARDIR}/.modules
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fi
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MODULESDIR=$save_modules_dir
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}
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#
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# Call this function to assert mutual exclusion with Shorewall. If you invoke the
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# /sbin/shorewall program while holding mutual exclusion, you should pass "nolock" as
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# the first argument. Example "shorewall nolock refresh"
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#
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# This function uses the lockfile utility from procmail if it exists.
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# Otherwise, it uses a somewhat race-prone algorithm to attempt to simulate the
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# behavior of lockfile.
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#
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mutex_on()
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{
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local try
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try=0
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local lockf
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lockf=${LOCKFILE:=${VARDIR}/lock}
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MUTEX_TIMEOUT=${MUTEX_TIMEOUT:-60}
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if [ $MUTEX_TIMEOUT -gt 0 ]; then
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[ -d ${VARDIR} ] || mkdir -p ${VARDIR}
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if qt mywhich lockfile; then
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lockfile -${MUTEX_TIMEOUT} -r1 ${lockf}
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else
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while [ -f ${lockf} -a ${try} -lt ${MUTEX_TIMEOUT} ] ; do
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sleep 1
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try=$((${try} + 1))
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done
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if [ ${try} -lt ${MUTEX_TIMEOUT} ] ; then
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# Create the lockfile
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echo $$ > ${lockf}
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else
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echo "Giving up on lock file ${lockf}" >&2
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fi
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fi
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fi
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}
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#
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# Call this function to release mutual exclusion
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#
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mutex_off()
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{
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rm -f ${LOCKFILE:=${VARDIR}/lock}
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}
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#
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# Load an optional library
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#
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lib_load() # $1 = Name of the Library, $2 = Error Message heading if the library cannot be found
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{
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local lib
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lib=${SHAREDIR}/lib.$1
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local loaded
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eval loaded=\$LIB_${1}_LOADED
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if [ -z "$loaded" ]; then
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[ -f $lib ] || lib=${SHELLSHAREDIR}/lib.$1
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if [ -f $lib ]; then
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progress_message "Loading library $lib..."
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. $lib
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eval LIB_${1}_LOADED=Yes
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else
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startup_error "$2 requires the Shorewall library $1 ($lib) which is not installed"
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fi
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fi
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}
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#
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# Query NetFilter about the existence of a filter chain
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#
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chain_exists() # $1 = chain name
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{
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qt $IP6TABLES -L $1 -n
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}
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#
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# Find the value 'dev' in the passed arguments then echo the next value
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#
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find_device() {
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while [ $# -gt 1 ]; do
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[ "x$1" = xdev ] && echo $2 && return
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shift
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done
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}
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#
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# Find the value 'via' in the passed arguments then echo the next value
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#
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find_gateway() {
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while [ $# -gt 1 ]; do
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[ "x$1" = xvia ] && echo $2 && return
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shift
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done
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}
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#
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# Find the value 'mtu' in the passed arguments then echo the next value
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#
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find_mtu() {
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while [ $# -gt 1 ]; do
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[ "x$1" = xmtu ] && echo $2 && return
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shift
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done
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}
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#
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# Find the value 'peer' in the passed arguments then echo the next value up to
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# "/"
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#
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find_peer() {
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while [ $# -gt 1 ]; do
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[ "x$1" = xpeer ] && echo ${2%/*} && return
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shift
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done
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}
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#
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# Try to find the gateway through an interface looking for 'nexthop'
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find_nexthop() # $1 = interface
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{
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echo $(find_gateway `ip -6 route list | grep "[[:space:]]nexthop.* $1"`)
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}
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#
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# Find the default route's interface
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#
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find_default_interface() {
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ip -6 route list | while read first rest; do
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[ "$first" = default ] && echo $(find_device $rest) && return
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done
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}
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#
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# Find the interface with the passed MAC address
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#
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find_interface_by_mac() {
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local mac
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mac=$1
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local first
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local second
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local rest
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local dev
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ip link list | while read first second rest; do
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case $first in
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*:)
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dev=$second
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;;
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*)
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if [ "$second" = $mac ]; then
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echo ${dev%:}
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return
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fi
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esac
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done
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}
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#
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# Determine if Interface is up
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#
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interface_is_up() {
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[ -n "$(ip link list dev $1 2> /dev/null | grep -e '[<,]UP[,>]')" ]
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}
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#
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# Find interface address--returns the first IP address assigned to the passed
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# device
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#
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find_first_interface_address() # $1 = interface
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{
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#
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# get the line of output containing the first IP address
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#
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addr=$(ip -f inet6 addr show $1 2> /dev/null | grep 'inet6 .* global' | head -n1)
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#
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# If there wasn't one, bail out now
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#
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[ -n "$addr" ] || fatal_error "Can't determine the IPv6 address of $1"
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#
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# Strip off the trailing VLSM mask (or the peer IP in case of a P-t-P link)
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# along with everything else on the line
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#
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echo $addr | sed 's/\s*inet6 //;s/\/.*//;s/ peer.*//'
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}
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find_first_interface_address_if_any() # $1 = interface
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{
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#
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# get the line of output containing the first IP address
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#
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addr=$(ip -f inet6 addr show $1 2> /dev/null | grep 'inet6 .* global' | head -n1)
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#
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# Strip off the trailing VLSM mask (or the peer IP in case of a P-t-P link)
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# along with everything else on the line
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#
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[ -n "$addr" ] && echo $addr | sed 's/\s*inet6 //;s/\/.*//;s/ peer.*//' || echo ::
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}
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#
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# Determine if interface is usable from a Netfilter prespective
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#
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interface_is_usable() # $1 = interface
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{
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interface_is_up $1 && [ "$(find_first_interface_address_if_any $1)" != :: ]
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}
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#
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# Find interface addresses--returns the set of addresses assigned to the passed
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# device
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#
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find_interface_addresses() # $1 = interface
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{
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ip -f inet6 addr show $1 2> /dev/null | grep inet\ | sed 's/\s*inet6 //;s/\/.*//;s/ peer.*//'
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}
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#
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# echo the list of networks routed out of a given interface
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#
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get_routed_networks() # $1 = interface name, $2-n = Fatal error message
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{
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local address
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local rest
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ip -6 route show dev $1 2> /dev/null |
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while read address rest; do
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case "$address" in
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default)
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if [ $# -gt 1 ]; then
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shift
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fatal_error "$@"
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|
else
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echo "WARNING: default route ignored on interface $1" >&2
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fi
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;;
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multicast|broadcast|prohibit|nat|throw|nexthop)
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;;
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*)
|
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[ "$address" = "${address%/*}" ] && address="${address}/128"
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echo $address
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;;
|
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esac
|
|
done
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|
}
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|
|
|
#
|
|
# Internal version of 'which'
|
|
#
|
|
mywhich() {
|
|
local dir
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|
|
|
for dir in $(split $PATH); do
|
|
if [ -x $dir/$1 ]; then
|
|
echo $dir/$1
|
|
return 0
|
|
fi
|
|
done
|
|
|
|
return 2
|
|
}
|
|
|
|
#
|
|
# Set default config path
|
|
#
|
|
ensure_config_path() {
|
|
local F
|
|
F=${SHAREDIR}/configpath
|
|
if [ -z "$CONFIG_PATH" ]; then
|
|
[ -f $F ] || { echo " ERROR: $F does not exist"; exit 2; }
|
|
. $F
|
|
fi
|
|
|
|
if [ -n "$SHOREWALL_DIR" ]; then
|
|
[ "${CONFIG_PATH%%:*}" = "$SHOREWALL_DIR" ] || CONFIG_PATH=$SHOREWALL_DIR:$CONFIG_PATH
|
|
fi
|
|
}
|
|
|
|
#
|
|
# Find a File -- For relative file name, look in each ${CONFIG_PATH} then ${CONFDIR}
|
|
#
|
|
find_file()
|
|
{
|
|
local saveifs
|
|
saveifs=
|
|
local directory
|
|
|
|
case $1 in
|
|
/*)
|
|
echo $1
|
|
;;
|
|
*)
|
|
for directory in $(split $CONFIG_PATH); do
|
|
if [ -f $directory/$1 ]; then
|
|
echo $directory/$1
|
|
return
|
|
fi
|
|
done
|
|
|
|
echo ${CONFDIR}/$1
|
|
;;
|
|
esac
|
|
}
|
|
|
|
#
|
|
# Get fully-qualified name of file
|
|
#
|
|
resolve_file() # $1 = file name
|
|
{
|
|
local pwd
|
|
pwd=$PWD
|
|
|
|
case $1 in
|
|
/*)
|
|
echo $1
|
|
;;
|
|
.)
|
|
echo $pwd
|
|
;;
|
|
./*)
|
|
echo ${pwd}${1#.}
|
|
;;
|
|
..)
|
|
cd ..
|
|
echo $PWD
|
|
cd $pwd
|
|
;;
|
|
../*)
|
|
cd ..
|
|
resolve_file ${1#../}
|
|
cd $pwd
|
|
;;
|
|
*)
|
|
echo $pwd/$1
|
|
;;
|
|
esac
|
|
}
|
|
|
|
#
|
|
# Perform variable substitution on the passed argument and echo the result
|
|
#
|
|
expand() # $@ = contents of variable which may be the name of another variable
|
|
{
|
|
eval echo \"$@\"
|
|
}
|
|
|
|
#
|
|
# Function for including one file into another
|
|
#
|
|
INCLUDE() {
|
|
. $(find_file $(expand $@))
|
|
}
|
|
|
|
#
|
|
# Set the Shorewall state
|
|
#
|
|
set_state () # $1 = state
|
|
{
|
|
echo "$1 ($(date))" > ${VARDIR}/state
|
|
}
|
|
|
|
#
|
|
# Determine which optional facilities are supported by iptables/netfilter
|
|
#
|
|
determine_capabilities() {
|
|
CONNTRACK_MATCH=
|
|
NEW_CONNTRACK_MATCH=
|
|
OLD_CONNTRACK_MATCH=
|
|
MULTIPORT=
|
|
XMULTIPORT=
|
|
POLICY_MATCH=
|
|
PHYSDEV_MATCH=
|
|
PHYSDEV_BRIDGE=
|
|
IPRANGE_MATCH=
|
|
RECENT_MATCH=
|
|
OWNER_MATCH=
|
|
IPSET_MATCH=
|
|
CONNMARK=
|
|
XCONNMARK=
|
|
CONNMARK_MATCH=
|
|
XCONNMARK_MATCH=
|
|
RAW_TABLE=
|
|
IPP2P_MATCH=
|
|
OLD_IPP2P_MATCH=
|
|
LENGTH_MATCH=
|
|
CLASSIFY_TARGET=
|
|
ENHANCED_REJECT=
|
|
USEPKTTYPE=
|
|
KLUDGEFREE=
|
|
MARK=
|
|
XMARK=
|
|
EXMARK=
|
|
TPROXY_TARGET=
|
|
MANGLE_FORWARD=
|
|
COMMENTS=
|
|
ADDRTYPE=
|
|
TCPMSS_MATCH=
|
|
HASHLIMIT_MATCH=
|
|
NFQUEUE_TARGET=
|
|
REALM_MATCH=
|
|
HELPER_MATCH=
|
|
CONNLIMIT_MATCH=
|
|
TIME_MATCH=
|
|
GOTO_TARGET=
|
|
IPMARK_TARGET=
|
|
LOG_TARGET=Yes
|
|
FLOW_FILTER=
|
|
|
|
chain=fooX$$
|
|
|
|
[ -n "$IP6TABLES" ] || IP6TABLES=$(mywhich ip6tables)
|
|
|
|
if [ -z "$IP6TABLES" ]; then
|
|
echo " ERROR: No executable iptables binary can be found on your PATH" >&2
|
|
exit 1
|
|
fi
|
|
|
|
[ -n "$IP" ] || IP=$(which ip)
|
|
|
|
[ -n "$IP" -a -x "$IP" ] || IP=
|
|
|
|
qt $IP6TABLES -t mangle -L -n && MANGLE_ENABLED=Yes || MANGLE_ENABLED=
|
|
|
|
qt $IP6TABLES -F $chain
|
|
qt $IP6TABLES -X $chain
|
|
if ! $IP6TABLES -N $chain; then
|
|
echo " ERROR: The command \"$IP6TABLES -N $chain\" failed" >&2
|
|
exit 1
|
|
fi
|
|
|
|
chain1=${chain}1
|
|
|
|
qt $IP6TABLES -F $chain1
|
|
qt $IP6TABLES -X $chain1
|
|
if ! $IP6TABLES -N $chain1; then
|
|
echo " ERROR: The command \"$IP6TABLES -N $chain1\" failed" >&2
|
|
exit 1
|
|
fi
|
|
|
|
if ! qt $IP6TABLES -A $chain -m state --state ESTABLISHED,RELATED -j ACCEPT; then
|
|
echo " ERROR: Your kernel lacks connection tracking and/or state matching -- Shorewall will not run on this system" >&2
|
|
exit 1
|
|
fi
|
|
|
|
qt $IP6TABLES -A $chain -m conntrack --ctorigdst ::1 -j ACCEPT && CONNTRACK_MATCH=Yes
|
|
|
|
if [ -n "$CONNTRACK_MATCH" ]; then
|
|
qt $IP6TABLES -A $chain -m conntrack -p tcp --ctorigdstport 22 -j ACCEPT && NEW_CONNTRACK_MATCH=Yes
|
|
qt $IP6TABLES -A $chain -m conntrack ! --ctorigdst ::1 || OLD_CONNTRACK_MATCH=Yes
|
|
fi
|
|
|
|
if qt $IP6TABLES -A $chain -p tcp -m multiport --dports 21,22 -j ACCEPT; then
|
|
MULTIPORT=Yes
|
|
qt $IP6TABLES -A $chain -p tcp -m multiport --sports 60 -m multiport --dports 99 -j ACCEPT && KLUDEFREE=Yes
|
|
fi
|
|
|
|
qt $IP6TABLES -A $chain -p tcp -m multiport --dports 21:22 -j ACCEPT && XMULTIPORT=Yes
|
|
qt $IP6TABLES -A $chain -m policy --pol ipsec --mode tunnel --dir in -j ACCEPT && POLICY_MATCH=Yes
|
|
|
|
if qt $IP6TABLES -A $chain -m physdev --physdev-out eth0 -j ACCEPT; then
|
|
PHYSDEV_MATCH=Yes
|
|
qt $IP6TABLES -A $chain -m physdev --physdev-is-bridged --physdev-in eth0 --physdev-out eth0 -j ACCEPT && PHYSDEV_BRIDGE=Yes
|
|
if [ -z "${KLUDGEFREE}" ]; then
|
|
qt $IP6TABLES -A $chain -m physdev --physdev-in eth0 -m physdev --physdev-out eth0 -j ACCEPT && KLUDGEFREE=Yes
|
|
fi
|
|
fi
|
|
|
|
if qt $IP6TABLES -A $chain -m iprange --src-range ::1-::2 -j ACCEPT; then
|
|
IPRANGE_MATCH=Yes
|
|
if [ -z "${KLUDGEFREE}" ]; then
|
|
qt $IP6TABLES -A $chain -m iprange --src-range ::1-::2 -m iprange --dst-range ::1-::2 -j ACCEPT && KLUDGEFREE=Yes
|
|
fi
|
|
fi
|
|
|
|
qt $IP6TABLES -A $chain -m recent --update -j ACCEPT && RECENT_MATCH=Yes
|
|
qt $IP6TABLES -A $chain -m owner --uid-owner 0 -j ACCEPT && OWNER_MATCH=Yes
|
|
|
|
if qt $IP6TABLES -A $chain -m connmark --mark 2 -j ACCEPT; then
|
|
CONNMARK_MATCH=Yes
|
|
qt $IP6TABLES -A $chain -m connmark --mark 2/0xFF -j ACCEPT && XCONNMARK_MATCH=Yes
|
|
fi
|
|
|
|
qt $IP6TABLES -A $chain -p tcp -m ipp2p --edk -j ACCEPT && IPP2P_MATCH=Yes
|
|
if [ -n "$IPP2P_MATCH" ]; then
|
|
qt $IP6TABLES -A $chain -p tcp -m ipp2p --ipp2p -j ACCEPT && OLD_IPP2P_MATCH=Yes
|
|
fi
|
|
|
|
qt $IP6TABLES -A $chain -m length --length 10:20 -j ACCEPT && LENGTH_MATCH=Yes
|
|
qt $IP6TABLES -A $chain -j REJECT --reject-with icmp6-adm-prohibited && ENHANCED_REJECT=Yes
|
|
|
|
qt $IP6TABLES -A $chain -j ACCEPT -m comment --comment "This is a comment" && COMMENTS=Yes
|
|
|
|
if [ -n "$MANGLE_ENABLED" ]; then
|
|
qt $IP6TABLES -t mangle -N $chain
|
|
|
|
if qt $IP6TABLES -t mangle -A $chain -j MARK --set-mark 1; then
|
|
MARK=Yes
|
|
qt $IP6TABLES -t mangle -A $chain -j MARK --and-mark 0xFF && XMARK=Yes
|
|
qt $IP6TABLES -t mangle -A $chain -j MARK --set-mark 1/0xFF && EXMARK=Yes
|
|
fi
|
|
|
|
if qt $IP6TABLES -t mangle -A $chain -j CONNMARK --save-mark; then
|
|
CONNMARK=Yes
|
|
qt $IP6TABLES -t mangle -A $chain -j CONNMARK --save-mark --mask 0xFF && XCONNMARK=Yes
|
|
fi
|
|
|
|
qt $IP6TABLES -t mangle -A $chain -j CLASSIFY --set-class 1:1 && CLASSIFY_TARGET=Yes
|
|
qt $IP6TABLES -t mangle -A $chain -j IPMARK --addr src && IPMARK_TARGET=Yes
|
|
qt $IP6TABLES -t mangle -A $chain -p tcp -j TPROXY --on-port 0 --tproxy-mark 1 && TPROXY_TARGET=Yes
|
|
qt $IP6TABLES -t mangle -F $chain
|
|
qt $IP6TABLES -t mangle -X $chain
|
|
qt $IP6TABLES -t mangle -L FORWARD -n && MANGLE_FORWARD=Yes
|
|
fi
|
|
|
|
qt $IP6TABLES -t raw -L -n && RAW_TABLE=Yes
|
|
|
|
if qt mywhich ipset; then
|
|
qt ipset -X $chain # Just in case something went wrong the last time
|
|
|
|
if qt ipset -N $chain iphash ; then
|
|
if qt $IP6TABLES -A $chain -m set --set $chain src -j ACCEPT; then
|
|
qt $IP6TABLES -D $chain -m set --set $chain src -j ACCEPT
|
|
IPSET_MATCH=Yes
|
|
fi
|
|
qt ipset -X $chain
|
|
fi
|
|
fi
|
|
|
|
qt $IP6TABLES -A $chain -m pkttype --pkt-type broadcast -j ACCEPT && USEPKTTYPE=Yes
|
|
qt $IP6TABLES -A $chain -m addrtype --src-type BROADCAST -j ACCEPT && ADDRTYPE=Yes
|
|
qt $IP6TABLES -A $chain -p tcp --tcp-flags SYN,RST SYN -m tcpmss --mss 1000:1500 -j ACCEPT && TCPMSS_MATCH=Yes
|
|
qt $IP6TABLES -A $chain -m hashlimit --hashlimit-upto 4 --hashlimit-burst 5 --hashlimit-name $chain --hashlimit-mode dstip -j ACCEPT && HASHLIMIT_MATCH=Yes
|
|
if [ -z "$HASHLIMIT_MATCH" ]; then
|
|
qt $IP6TABLES -A $chain -m hashlimit --hashlimit 4 --hashlimit-burst 5 --hashlimit-name $chain --hashlimit-mode dstip -j ACCEPT && OLD_HL_MATCH=Yes
|
|
HASHLIMIT_MATCH=$OLD_HL_MATCH
|
|
fi
|
|
qt $IP6TABLES -A $chain -j NFQUEUE --queue-num 4 && NFQUEUE_TARGET=Yes
|
|
qt $IP6TABLES -A $chain -m realm --realm 4 && REALM_MATCH=Yes
|
|
qt $IP6TABLES -A $chain -m helper --helper "ftp" && HELPER_MATCH=Yes
|
|
qt $IP6TABLES -A $chain -m connlimit --connlimit-above 8 -j DROP && CONNLIMIT_MATCH=Yes
|
|
qt $IP6TABLES -A $chain -m time --timestart 23:00 -j DROP && TIME_MATCH=Yes
|
|
qt $IP6TABLES -A $chain -g $chain1 && GOTO_TARGET=Yes
|
|
qt $IP6TABLES -A $chain -j LOG || LOG_TARGET=
|
|
|
|
qt $IP6TABLES -F $chain
|
|
qt $IP6TABLES -X $chain
|
|
qt $IP6TABLES -F $chain1
|
|
qt $IP6TABLES -X $chain1
|
|
|
|
[ -n "$IP" ] && $IP filter add flow help 2>&1 | grep -q ^Usage && FLOW_FILTER=Yes
|
|
|
|
CAPVERSION=$SHOREWALL_CAPVERSION
|
|
KERNELVERSION=$(printf "%d%02d%02d" $(uname -r 2> /dev/null | sed -e 's/-.*//' -e 's/^\([0-9][0-9]*\)\.\([0-9][0-9]*\)\.\([0-9][0-9]*\).*$/\1 \2 \3/g'))
|
|
}
|
|
|
|
report_capabilities() {
|
|
report_capability() # $1 = Capability Description , $2 Capability Setting (if any)
|
|
{
|
|
local setting
|
|
setting=
|
|
|
|
[ "x$2" = "xYes" ] && setting="Available" || setting="Not available"
|
|
|
|
echo " " $1: $setting
|
|
}
|
|
|
|
if [ $VERBOSITY -gt 1 ]; then
|
|
echo "Shorewall6 has detected the following ip6tables/netfilter capabilities:"
|
|
report_capability "Packet Mangling" $MANGLE_ENABLED
|
|
report_capability "Multi-port Match" $MULTIPORT
|
|
[ -n "$MULTIPORT" ] && report_capability "Extended Multi-port Match" $XMULTIPORT
|
|
report_capability "Connection Tracking Match" $CONNTRACK_MATCH
|
|
if [ -n "$CONNTRACK_MATCH" ]; then
|
|
report_capability "Extended Connection Tracking Match Support" $NEW_CONNTRACK_MATCH
|
|
[ -n "$OLD_CONNTRACK_MATCH" ] && report_capability "Old Connection Tracking Match Syntax" $OLD_CONNTRACK_MATCH
|
|
fi
|
|
report_capability "Packet Type Match" $USEPKTTYPE
|
|
report_capability "Policy Match" $POLICY_MATCH
|
|
report_capability "Physdev Match" $PHYSDEV_MATCH
|
|
report_capability "Physdev-is-bridged Support" $PHYSDEV_BRIDGE
|
|
report_capability "Packet length Match" $LENGTH_MATCH
|
|
report_capability "IP range Match" $IPRANGE_MATCH
|
|
report_capability "Recent Match" $RECENT_MATCH
|
|
report_capability "Owner Match" $OWNER_MATCH
|
|
report_capability "Ipset Match" $IPSET_MATCH
|
|
report_capability "CONNMARK Target" $CONNMARK
|
|
[ -n "$CONNMARK" ] && report_capability "Extended CONNMARK Target" $XCONNMARK
|
|
report_capability "Connmark Match" $CONNMARK_MATCH
|
|
[ -n "$CONNMARK_MATCH" ] && report_capability "Extended Connmark Match" $XCONNMARK_MATCH
|
|
report_capability "Raw Table" $RAW_TABLE
|
|
report_capability "IPP2P Match" $IPP2P_MATCH
|
|
[ -n "$OLD_IPP2P_MATCH" ] && report_capability "Old IPP2P Match Syntax" $OLD_IPP2P_MATCH
|
|
report_capability "CLASSIFY Target" $CLASSIFY_TARGET
|
|
report_capability "Extended REJECT" $ENHANCED_REJECT
|
|
report_capability "Repeat match" $KLUDGEFREE
|
|
report_capability "MARK Target" $MARK
|
|
[ -n "$MARK" ] && report_capability "Extended MARK Target" $XMARK
|
|
[ -n "$XMARK" ] && report_capability "Extended MARK Target 2" $EXMARK
|
|
report_capability "Mangle FORWARD Chain" $MANGLE_FORWARD
|
|
report_capability "Comments" $COMMENTS
|
|
report_capability "Address Type Match" $ADDRTYPE
|
|
report_capability "TCPMSS Match" $TCPMSS_MATCH
|
|
report_capability "Hashlimit Match" $HASHLIMIT_MATCH
|
|
[ -n "$OLD_HL_MATCH" ] && report_capability "Old Hashlimit Match" $OLD_HL_MATCH
|
|
report_capability "NFQUEUE Target" $NFQUEUE_TARGET
|
|
report_capability "Realm Match" $REALM_MATCH
|
|
report_capability "Helper Match" $HELPER_MATCH
|
|
report_capability "Connlimit Match" $CONNLIMIT_MATCH
|
|
report_capability "Time Match" $TIME_MATCH
|
|
report_capability "Goto Support" $GOTO_TARGET
|
|
report_capability "IPMARK Target" $IPMARK_TARGET
|
|
report_capability "LOG Target" $LOG_TARGET
|
|
report_capability "TPROXY Target" $TPROXY_TARGET
|
|
report_capability "FLOW Classifier" $FLOW_FILTER
|
|
fi
|
|
|
|
[ -n "$PKTTYPE" ] || USEPKTTYPE=
|
|
|
|
}
|
|
|
|
report_capabilities1() {
|
|
report_capability1() # $1 = Capability
|
|
{
|
|
eval echo $1=\$$1
|
|
}
|
|
|
|
echo "#"
|
|
echo "# Shorewall6 $SHOREWALL_VERSION detected the following ip6tables/netfilter capabilities - $(date)"
|
|
echo "#"
|
|
report_capability1 MANGLE_ENABLED
|
|
report_capability1 MULTIPORT
|
|
report_capability1 XMULTIPORT
|
|
report_capability1 CONNTRACK_MATCH
|
|
report_capability1 NEW_CONNTRACK_MATCH
|
|
report_capability1 OLD_CONNTRACK_MATCH
|
|
report_capability1 USEPKTTYPE
|
|
report_capability1 POLICY_MATCH
|
|
report_capability1 PHYSDEV_MATCH
|
|
report_capability1 PHYSDEV_BRIDGE
|
|
report_capability1 LENGTH_MATCH
|
|
report_capability1 IPRANGE_MATCH
|
|
report_capability1 RECENT_MATCH
|
|
report_capability1 OWNER_MATCH
|
|
report_capability1 IPSET_MATCH
|
|
report_capability1 CONNMARK
|
|
report_capability1 XCONNMARK
|
|
report_capability1 CONNMARK_MATCH
|
|
report_capability1 XCONNMARK_MATCH
|
|
report_capability1 RAW_TABLE
|
|
report_capability1 IPP2P_MATCH
|
|
report_capability1 OLD_IPP2P_MATCH
|
|
report_capability1 CLASSIFY_TARGET
|
|
report_capability1 ENHANCED_REJECT
|
|
report_capability1 KLUDGEFREE
|
|
report_capability1 MARK
|
|
report_capability1 XMARK
|
|
report_capability1 EXMARK
|
|
report_capability1 MANGLE_FORWARD
|
|
report_capability1 COMMENTS
|
|
report_capability1 ADDRTYPE
|
|
report_capability1 TCPMSS_MATCH
|
|
report_capability1 HASHLIMIT_MATCH
|
|
report_capability1 OLD_HL_MATCH
|
|
report_capability1 NFQUEUE_TARGET
|
|
report_capability1 REALM_MATCH
|
|
report_capability1 HELPER_MATCH
|
|
report_capability1 CONNLIMIT_MATCH
|
|
report_capability1 TIME_MATCH
|
|
report_capability1 GOTO_TARGET
|
|
report_capability1 IPMARK_TARGET
|
|
report_capability1 LOG_TARGET
|
|
report_capability1 TPROXY_TARGET
|
|
report_capability1 FLOW_FILTER
|
|
|
|
echo CAPVERSION=$SHOREWALL_CAPVERSION
|
|
echo KERNELVERSION=$KERNELVERSION
|
|
}
|
|
|
|
detect_gateway() # $1 = interface
|
|
{
|
|
local interface
|
|
interface=$1
|
|
#
|
|
# First assume that this is some sort of point-to-point interface
|
|
#
|
|
gateway=$( find_peer $(ip -6 addr list $interface ) )
|
|
#
|
|
# Maybe there's a default route through this gateway already
|
|
#
|
|
[ -n "$gateway" ] || gateway=$(find_gateway $(ip -6 route list dev $interface))
|
|
#
|
|
# Last hope -- is there a load-balancing route through the interface?
|
|
#
|
|
[ -n "$gateway" ] || gateway=$(find_nexthop $interface)
|
|
#
|
|
# Be sure we found one
|
|
#
|
|
[ -n "$gateway" ] && echo $gateway
|
|
}
|
|
|
|
# Function to truncate a string -- It uses 'cut -b -<n>'
|
|
# rather than ${v:first:last} because light-weight shells like ash and
|
|
# dash do not support that form of expansion.
|
|
#
|
|
|
|
truncate() # $1 = length
|
|
{
|
|
cut -b -${1}
|
|
}
|
|
|
|
delete_tc1()
|
|
{
|
|
clear_one_tc() {
|
|
tc qdisc del dev $1 root 2> /dev/null
|
|
tc qdisc del dev $1 ingress 2> /dev/null
|
|
|
|
}
|
|
|
|
run_user_exit tcclear
|
|
|
|
run_ip link list | \
|
|
while read inx interface details; do
|
|
case $inx in
|
|
[0-9]*)
|
|
clear_one_tc ${interface%:}
|
|
;;
|
|
*)
|
|
;;
|
|
esac
|
|
done
|
|
}
|
|
|
|
#
|
|
# Detect a device's MTU -- echos the passed device's MTU
|
|
#
|
|
get_device_mtu() # $1 = device
|
|
{
|
|
local output
|
|
output="$(ip link list dev $1 2> /dev/null)" # quotes required for /bin/ash
|
|
|
|
if [ -n "$output" ]; then
|
|
echo $(find_mtu $output)
|
|
else
|
|
echo 1500
|
|
fi
|
|
}
|
|
|
|
#
|
|
# Version of the above that doesn't generate any output for MTU 1500.
|
|
# Generates 'mtu <mtu+>' otherwise, where <mtu+> is the device's MTU + 100
|
|
#
|
|
get_device_mtu1() # $1 = device
|
|
{
|
|
local output
|
|
output="$(ip link list dev $1 2> /dev/null)" # quotes required for /bin/ash
|
|
local mtu
|
|
|
|
if [ -n "$output" ]; then
|
|
mtu=$(find_mtu $output)
|
|
if [ -n "$mtu" ]; then
|
|
[ $mtu = 1500 ] || echo mtu $(($mtu + 100))
|
|
fi
|
|
fi
|
|
|
|
}
|
|
|
|
#
|
|
# Undo changes to routing
|
|
#
|
|
undo_routing() {
|
|
|
|
if [ -z "$g_noroutes" ]; then
|
|
#
|
|
# Restore rt_tables database
|
|
#
|
|
if [ -f ${VARDIR}/rt_tables ]; then
|
|
[ -w /etc/iproute2/rt_table -a -z "$KEEP_RT_TABLES" ] && cp -f ${VARDIR}/rt_tables /etc/iproute2/ && progress_message "/etc/iproute2/rt_tables database restored"
|
|
rm -f ${VARDIR}/rt_tables
|
|
fi
|
|
#
|
|
# Restore the rest of the routing table
|
|
#
|
|
if [ -f ${VARDIR}/undo_routing ]; then
|
|
. ${VARDIR}/undo_routing
|
|
progress_message "Shorewall6-generated routing tables and routing rules removed"
|
|
rm -f ${VARDIR}/undo_routing
|
|
fi
|
|
fi
|
|
|
|
}
|
|
|
|
restore_default_route() {
|
|
if [ -z "$g_noroutes" -a -f ${VARDIR}/default_route ]; then
|
|
local default_route
|
|
default_route=
|
|
local route
|
|
|
|
while read route ; do
|
|
case $route in
|
|
default*)
|
|
if [ -n "$default_route" ]; then
|
|
case "$default_route" in
|
|
*metric*)
|
|
#
|
|
# Don't restore a route with a metric -- we only replace the one with metric == 0
|
|
#
|
|
qt ip -6 route delete default metric 0 && \
|
|
progress_message "Default Route with metric 0 deleted"
|
|
;;
|
|
*)
|
|
qt ip -6 route replace $default_route && \
|
|
progress_message "Default Route (${default_route# }) restored"
|
|
;;
|
|
esac
|
|
|
|
break
|
|
fi
|
|
|
|
default_route="$default_route $route"
|
|
;;
|
|
*)
|
|
default_route="$default_route $route"
|
|
;;
|
|
esac
|
|
done < ${VARDIR}/default_route
|
|
|
|
rm -f ${VARDIR}/default_route
|
|
fi
|
|
}
|
|
|
|
#
|
|
# Determine how to do "echo -e"
|
|
#
|
|
|
|
find_echo() {
|
|
local result
|
|
|
|
result=$(echo "a\tb")
|
|
[ ${#result} -eq 3 ] && { echo echo; return; }
|
|
|
|
result=$(echo -e "a\tb")
|
|
[ ${#result} -eq 3 ] && { echo "echo -e"; return; }
|
|
|
|
result=$(which echo)
|
|
[ -n "$result" ] && { echo "$result -e"; return; }
|
|
|
|
echo echo
|
|
}
|
|
|
|
# Determine which version of mktemp is present (if any) and set MKTEMP accortingly:
|
|
#
|
|
# None - No mktemp
|
|
# BSD - BSD mktemp (Mandrake)
|
|
# STD - mktemp.org mktemp
|
|
#
|
|
find_mktemp() {
|
|
local mktemp
|
|
mktemp=`mywhich mktemp 2> /dev/null`
|
|
|
|
if [ -n "$mktemp" ]; then
|
|
if qt mktemp -V ; then
|
|
MKTEMP=STD
|
|
else
|
|
MKTEMP=BSD
|
|
fi
|
|
else
|
|
MKTEMP=None
|
|
fi
|
|
}
|
|
|
|
#
|
|
# create a temporary file. If a directory name is passed, the file will be created in
|
|
# that directory. Otherwise, it will be created in a temporary directory.
|
|
#
|
|
mktempfile() {
|
|
|
|
[ -z "$MKTEMP" ] && find_mktemp
|
|
|
|
if [ $# -gt 0 ]; then
|
|
case "$MKTEMP" in
|
|
BSD)
|
|
mktemp $1/shorewall.XXXXXX
|
|
;;
|
|
STD)
|
|
mktemp -p $1 shorewall.XXXXXX
|
|
;;
|
|
None)
|
|
> $1/shorewall-$$ && echo $1/shorewall-$$
|
|
;;
|
|
*)
|
|
error_message "ERROR:Internal error in mktempfile"
|
|
;;
|
|
esac
|
|
else
|
|
case "$MKTEMP" in
|
|
BSD)
|
|
mktemp /tmp/shorewall.XXXXXX
|
|
;;
|
|
STD)
|
|
mktemp -t shorewall.XXXXXX
|
|
;;
|
|
None)
|
|
rm -f /tmp/shorewall-$$
|
|
> /tmp/shorewall-$$ && echo /tmp/shorewall-$$
|
|
;;
|
|
*)
|
|
error_message "ERROR:Internal error in mktempfile"
|
|
;;
|
|
esac
|
|
fi
|
|
}
|