forked from extern/shorewall_code
4bc13dd2d8
git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@4782 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb
2111 lines
46 KiB
Bash
2111 lines
46 KiB
Bash
#!/bin/sh
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#
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# Shorewall 3.3 -- /usr/share/shorewall/lib.config
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#
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# This program is under GPL [http://www.gnu.org/copyleft/gpl.htm]
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#
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# (c) 1999,2000,2001,2002,2003,2004,2005,2006 - 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., 675 Mass Ave, Cambridge, MA 02139, USA
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#
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# This library contains the configuration file parsing code common to
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# /usr/share/shorewall/compiler and /usr/share/shorewall/firewall
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#
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#
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# Replace commas with spaces and echo the result
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#
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separate_list() {
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local list="$@"
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local part
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local newlist
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local firstpart
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local lastpart
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local enclosure
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case "$list" in
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*,|,*|*,,*|*[[:space:]]*)
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#
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# There's been whining about us not catching embedded white space in
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# comma-separated lists. This is an attempt to snag some of the cases.
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#
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# The 'TERMINATOR' function will be set by the 'firewall' script to
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# either 'startup_error' or 'fatal_error' depending on the command and
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# command phase
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#
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[ -n "$TERMINATOR" ] && \
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$TERMINATOR "Invalid comma-separated list \"$@\""
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echo "WARNING -- invalid comma-separated list \"$@\"" >&2
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;;
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*\[*\]*)
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#
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# Where we need to embed comma-separated lists within lists, we enclose them
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# within square brackets.
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#
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firstpart=${list%%\[*}
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lastpart=${list#*\[}
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enclosure=${lastpart%%\]*}
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lastpart=${lastpart#*\]}
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case $lastpart in
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\,*)
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case $firstpart in
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*\,)
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echo "$(separate_list ${firstpart%,}) [$enclosure] $(separate_list ${lastpart#,})"
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;;
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*)
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echo "$(separate_list $firstpart)[$enclosure] $(separate_list ${lastpart#,})"
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;;
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esac
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;;
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*)
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case $firstpart in
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*\,)
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echo "$(separate_list ${firstpart%,}) [$enclosure]$(separate_list $lastpart)"
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;;
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*)
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echo "$(separate_list $firstpart)[$enclosure]$(separate_list $lastpart)"
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;;
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esac
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;;
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esac
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return
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;;
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esac
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list="$@"
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part="${list%%,*}"
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newlist="$part"
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while [ "x$part" != "x$list" ]; do
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list="${list#*,}";
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part="${list%%,*}";
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newlist="$newlist $part";
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done
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echo "$newlist"
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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 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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# Display elements of a list with leading white space
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#
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display_list() # $1 = List Title, rest of $* = list to display
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{
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[ $# -gt 1 ] && echo " $*"
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}
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#
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# Determine if a chain is a policy chain
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#
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is_policy_chain() # $1 = name of chain
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{
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eval test \"\$${1}_is_policy\" = Yes
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}
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# Function to truncate a string -- It uses 'cut -b -<n>'
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# rather than ${v:first:last} because light-weight shells like ash and
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# dash do not support that form of expansion.
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#
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truncate() # $1 = length
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{
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cut -b -${1}
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}
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#
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# Return a space separated list of values matching
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#
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list_walk() # $1 = element to search for, $2-$n = list
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{
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local e=$1 result=
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while [ $# -gt 1 ]; do
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shift
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case $1 in
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$e*)
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result="$result ${1##$e}"
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;;
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esac
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done
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echo $result
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}
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#
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# Functions to count list elements
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# - - - - - - - - - - - - - - - -
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# Whitespace-separated list
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#
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list_count1() {
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echo $#
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}
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#
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# Comma-separated list
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#
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list_count() {
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list_count1 $(separate_list $1)
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}
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#
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# Perform variable substitution on the passed argument and echo the result
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#
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expand() # $@ = contents of variable which may be the name of another variable
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{
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eval echo \"$@\"
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}
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#
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# Perform variable substitition on the values of the passed list of variables
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#
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expandv() # $* = list of variable names
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{
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local varval
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while [ $# -gt 0 ]; do
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eval varval=\$${1}
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eval $1=\"$varval\"
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shift
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done
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}
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#
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# Add whitespace after leading "!"
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#
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fix_bang()
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{
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local result=
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while [ $# -gt 0 ]; do
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case $1 in
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!*)
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result="$result ! ${1#!}"
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;;
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*)
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result="$result $1"
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;;
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esac
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shift
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done
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echo $result
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}
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#
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# This function assumes that the TMP_DIR variable is set and that
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# its value names an existing directory.
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#
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determine_zones()
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{
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local zone parent parents rest new_zone_file= r
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merge_zone()
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{
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local z zones="$ZONES" merged=
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if [ -n "$parents" ]; then
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ZONES=
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for z in $zones; do
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if [ -z "$merged" ] && list_search $z $parents; then
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ZONES="$ZONES $zone"
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merged=Yes
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fi
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ZONES="$ZONES $z"
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done
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else
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ZONES="$ZONES $zone"
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fi
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}
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strip_file zones
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ZONES=
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IPV4_ZONES=
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IPSEC_ZONES=
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[ "$IPSECFILE" = zones ] && new_zone_file=Yes || test -n "${FW:=fw}"
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while read zone type rest; do
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expandv zone type
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case $zone in
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*:*)
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parents=${zone#*:}
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zone=${zone%:*}
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[ -n "$zone" ] || startup_error "Invalid nested zone syntax: :$parents"
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parents=$(separate_list $parents)
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eval ${zone}_parents=\"$parents\"
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;;
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*)
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parents=
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eval ${zone}_parents=
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;;
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esac
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for parent in $parents; do
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[ "$parent" = "$FW" ] && startup_error "Sub-zones of the firewall zone are not allowed"
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list_search $parent $ZONES || startup_error "Parent zone not defined: $parent"
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done
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[ ${#zone} -gt $MAXZONENAMELENGTH ] && startup_error "Zone name longer than $MAXZONENAMELENGTH characters: $zone"
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case "$zone" in
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[0-9*])
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startup_error "Illegal zone name \"$zone\" in zones file"
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;;
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all|none)
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startup_error "Reserved zone name \"$zone\" in zones file"
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;;
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esac
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if [ -n "$new_zone_file" ]; then
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case ${type:=ipv4} in
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ipv4|IPv4|IPV4|plain|-)
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list_search $zone $ZONES $FW && startup_error "Zone $zone is defined more than once"
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merge_zone
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IPV4_ZONES="$IPV4_ZONES $zone"
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;;
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ipsec|IPSEC|ipsec4|IPSEC4)
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list_search $zone $ZONES $FW && startup_error "Zone $zone is defined more than once"
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[ -n "$POLICY_MATCH" ] || startup_error "Your kernel and/or iptables does not support policy match"
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eval ${zone}_is_ipsec=Yes
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eval ${zone}_is_complex=Yes
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merge_zone
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IPSEC_ZONES="$IPSEC_ZONES $zone"
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;;
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firewall)
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[ -n "$FW" ] && startup_error "Only one firewall zone may be defined"
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list_search $zone $ZONES && startup_error "Zone $zone is defined more than once"
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[ -n "$parents" ] && startup_error "The firewall zone may not be nested"
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for r in $rest; do
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[ "x$r" = x- ] || startup_error "OPTIONS not allowed on the firewall zone"
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done
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FW=$zone
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;;
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*)
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startup_error "Invalid Zone Type: $type"
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;;
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esac
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eval ${zone}_type=$type
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else
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list_search $zone $ZONES $FW && startup_error "Zone $zone is defined more than once"
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ZONES="$ZONES $zone"
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IPV4_ZONES="$IPV4_ZONES $zone"
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eval ${zone}_type=ipv4
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fi
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done < $TMP_DIR/zones
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[ -z "$ZONES" ] && startup_error "No ipv4 or ipsec Zones Defined"
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[ -z "$FW" ] && startup_error "No Firewall Zone Defined"
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}
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#
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# Validate the zone names and options in the interfaces file
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#
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validate_interfaces_file() {
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local wildcard
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local found_obsolete_option=
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local z interface networks options r iface option
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while read z interface networks options; do
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expandv z interface networks options
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r="$z $interface $networks $options"
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[ "x$z" = "x-" ] && z=
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if [ -n "$z" ]; then
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validate_zone $z || startup_error "Invalid zone ($z) in record \"$r\""
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fi
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list_search $interface $ALL_INTERFACES && \
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startup_error "Duplicate Interface $interface"
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wildcard=
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case $interface in
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*:*|+)
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startup_error "Invalid Interface Name: $interface"
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;;
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*+)
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wildcard=Yes
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;;
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esac
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ALL_INTERFACES="$ALL_INTERFACES $interface"
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options=$(separate_list $options)
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iface=$(chain_base $interface)
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eval ${iface}_broadcast="$networks"
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eval ${iface}_zone="$z"
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eval ${iface}_options=\"$options\"
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for option in $options; do
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case $option in
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-)
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;;
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dhcp|tcpflags|arp_filter|routefilter|logmartians|sourceroute|blacklist|nosmurfs|upnp|-)
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;;
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proxyarp)
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lib_load proxyarp "The 'proxyarp' option on interface $interface"
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;;
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maclist)
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lib_load maclist "The 'maclist' option"
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;;
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norfc1918)
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if [ "$PROGRAM" != compiler ]; then
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addr=$(ip -f inet addr show $interface 2> /dev/null | grep inet | head -n1)
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if [ -n "$addr" ]; then
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addr=$(echo $addr | sed 's/inet //;s/\/.*//;s/ peer.*//')
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for network in 10.0.0.0/8 176.16.0.0/12 192.168.0.0/16; do
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if in_network $addr $network; then
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startup_error "The 'norfc1918' option may not be specified on an interface with an RFC 1918 address. Interface:$interface"
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fi
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done
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fi
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fi
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;;
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arp_ignore=*)
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eval ${iface}_arp_ignore=${option#*=}
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;;
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arp_ignore)
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eval ${iface}_arp_ignore=1
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;;
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detectnets)
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[ -n "$wildcard" ] && \
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startup_error "The \"detectnets\" option may not be used with a wild-card interface"
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[ -n "$EXPORT" ] && \
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startup_error "'detectnets' not permitted with the -e run-line option"
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;;
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routeback)
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[ -n "$z" ] || startup_error "The routeback option may not be specified on a multi-zone interface"
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;;
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*)
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error_message "WARNING: Invalid option ($option) in record \"$r\""
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;;
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esac
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done
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done < $TMP_DIR/interfaces
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[ -z "$ALL_INTERFACES" ] && startup_error "No Interfaces Defined"
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}
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#
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# Process the ipsec information in the zones file
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#
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setup_ipsec() {
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local zone using_ipsec=
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#
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# Add a --set-mss rule to the passed chain
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#
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set_mss1() # $1 = chain, $2 = MSS
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{
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eval local policy=\$${1}_policy
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if [ "$policy" != NONE ]; then
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ensurechain $1
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run_iptables -I $1 -p tcp --tcp-flags SYN,RST SYN -j TCPMSS --set-mss $2
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fi
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}
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#
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# Set up rules to set MSS to and/or from zone "$zone"
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#
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set_mss() # $1 = MSS value, $2 = _in, _out or ""
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{
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for z in $ZONES $FW; do
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case $2 in
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_in)
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set_mss1 ${zone}2${z} $1
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;;
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_out)
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set_mss1 ${z}2${zone} $1
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;;
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*)
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set_mss1 ${z}2${zone} $1
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set_mss1 ${zone}2${z} $1
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;;
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esac
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done
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}
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do_options() # $1 = _in, _out or "" - $2 = option list
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{
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local option newoptions= val
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[ x${2} = x- ] && return
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for option in $(separate_list $2); do
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val=${option#*=}
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case $option in
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mss=[0-9]*) [ "$PROGRAM" = compiler ] && set_mss $val $1 ;;
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strict) newoptions="$newoptions --strict" ;;
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next) newoptions="$newoptions --next" ;;
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reqid=*) newoptions="$newoptions --reqid $val" ;;
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spi=*) newoptions="$newoptions --spi $val" ;;
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proto=*) newoptions="$newoptions --proto $val" ;;
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mode=*) newoptions="$newoptions --mode $val" ;;
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tunnel-src=*) newoptions="$newoptions --tunnel-src $val" ;;
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tunnel-dst=*) newoptions="$newoptions --tunnel-dst $val" ;;
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reqid!=*) newoptions="$newoptions ! --reqid $val" ;;
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spi!=*) newoptions="$newoptions ! --spi $val" ;;
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proto!=*) newoptions="$newoptions ! --proto $val" ;;
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mode!=*) newoptions="$newoptions ! --mode $val" ;;
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tunnel-src!=*) newoptions="$newoptions ! --tunnel-src $val" ;;
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tunnel-dst!=*) newoptions="$newoptions ! --tunnel-dst $val" ;;
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*) fatal_error "Invalid option \"$option\" for zone $zone" ;;
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esac
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done
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if [ -n "$newoptions" ]; then
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[ -n "$POLICY_MATCH" ] || fatal_error "Your kernel and/or iptables does not support policy match"
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eval ${zone}_is_complex=Yes
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eval ${zone}_ipsec${1}_options=\"${newoptions# }\"
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fi
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}
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case $IPSECFILE in
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zones)
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f=zones
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progress_message2 "$DOING IPSEC..."
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[ -n "$IPSEC_ZONES" ] && save_progress_message "Setting up IPSEC management..."
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;;
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*)
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f=$IPSECFILE
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strip_file $f
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using_ipsec=Yes
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if [ -s ${TMP_DIR}/$f ]; then
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progress_message2 "$DOING $f..."
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save_progress_message "Setting up IPSEC management..."
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fi
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;;
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esac
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while read zone type options in_options out_options mss; do
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expandv zone type options in_options out_options mss
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if [ -n "$using_ipsec" ]; then
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validate_zone1 $zone || fatal_error "Unknown zone: $zone"
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fi
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if [ -n "$type" ]; then
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if [ -n "$using_ipsec" ]; then
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case $type in
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No|no)
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;;
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Yes|yes)
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[ -n "$POLICY_MATCH" ] || fatal_error "Your kernel and/or iptables does not support policy match"
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eval ${zone}_is_ipsec=Yes
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eval ${zone}_is_complex=Yes
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eval ${zone}_type=ipsec4
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;;
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*)
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fatal_error "Invalid IPSEC column contents"
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;;
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esac
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fi
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do_options "" $options
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do_options "_in" $in_options
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do_options "_out" $out_options
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fi
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done < $TMP_DIR/$f
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}
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|
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#
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# Validate the zone names and options in the hosts file
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#
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validate_hosts_file() {
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local z hosts options r interface host option zports ipsec=
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check_bridge_port()
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{
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list_search ${interface}:${1} $zports || zports="$zports ${interface}:${1}"
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list_search $1 $ALL_PORTS || ALL_PORTS="$ALL_PORTS $1"
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}
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while read z hosts options; do
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expandv z hosts options
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r="$z $hosts $options"
|
|
validate_zone1 $z || startup_error "Invalid zone ($z) in record \"$r\""
|
|
|
|
case $hosts in
|
|
*:*)
|
|
|
|
interface=${hosts%%:*}
|
|
iface=$(chain_base $interface)
|
|
|
|
list_search $interface $ALL_INTERFACES || \
|
|
startup_error "Unknown interface ($interface) in record \"$r\""
|
|
|
|
hosts=${hosts#*:}
|
|
;;
|
|
*)
|
|
startup_error "Invalid HOST(S) column contents: $hosts"
|
|
;;
|
|
esac
|
|
|
|
eval zports=\$${z}_ports
|
|
|
|
if [ -z "$BRIDGING" ]; then
|
|
case $hosts in
|
|
*!*!*)
|
|
startup_error "Invalid hosts file entry: \"$r\""
|
|
;;
|
|
!*)
|
|
hosts=0.0.0.0/0
|
|
eval ${z}_is_complex=Yes
|
|
;;
|
|
*!*)
|
|
hosts=${hosts%%!*}
|
|
eval ${z}_is_complex=Yes
|
|
;;
|
|
esac
|
|
fi
|
|
|
|
for host in $(separate_list $hosts); do
|
|
if [ -n "$BRIDGING" ]; then
|
|
case $host in
|
|
*:*)
|
|
known_interface ${host%:*} && \
|
|
startup_error "Bridged interfaces may not be defined in ${CONFDIR}/interfaces: $host"
|
|
check_bridge_port ${host%%:*}
|
|
;;
|
|
*.*.*)
|
|
;;
|
|
*+|+*|*!*)
|
|
eval ${z}_is_complex=Yes
|
|
;;
|
|
*)
|
|
known_interface $host && \
|
|
startup_error "Bridged interfaces may not be defined in ${CONFDIR}/interfaces: $host"
|
|
check_bridge_port $host
|
|
;;
|
|
esac
|
|
else
|
|
case $host in
|
|
*.*.*)
|
|
;;
|
|
*+)
|
|
eval ${z}_is_complex=Yes
|
|
;;
|
|
*)
|
|
startup_error "BRIDGING=Yes is needed for this zone definition: $r"
|
|
;;
|
|
esac
|
|
fi
|
|
|
|
for option in $(separate_list $options) ; do
|
|
case $option in
|
|
norfc1918|blacklist|tcpflags|nosmurfs|-)
|
|
;;
|
|
maclist)
|
|
lib_load maclist "The 'maclist' option"
|
|
;;
|
|
ipsec)
|
|
[ -n "$POLICY_MATCH" ] || \
|
|
startup_error "Your kernel and/or iptables does not support policy match: ipsec"
|
|
eval ${z}_ipsec_hosts=\"\$${z}_ipsec_hosts $interface:$host\"
|
|
eval ${z}_is_complex=Yes
|
|
ipsec=Yes
|
|
;;
|
|
routeback)
|
|
eval ${z}_routeback=\"$interface:$host \$${z}_routeback\"
|
|
;;
|
|
*)
|
|
error_message "WARNING: Invalid option ($option) in record \"$r\""
|
|
;;
|
|
esac
|
|
done
|
|
done
|
|
|
|
[ -n "$zports" ] && eval ${z}_ports=\"$zports\"
|
|
|
|
done < $TMP_DIR/hosts
|
|
|
|
[ -n "$ALL_PORTS" ] && progress_message2 " Bridge ports are: $ALL_PORTS"
|
|
|
|
[ -n "${IPSEC_ZONES}${ipsec}" ] || POLICY_MATCH=
|
|
}
|
|
|
|
#
|
|
# Find interfaces to a given zone
|
|
#
|
|
# Search the variables representing the contents of the interfaces file and
|
|
# for each record matching the passed ZONE, echo the expanded contents of
|
|
# the "INTERFACE" column
|
|
#
|
|
find_interfaces() # $1 = interface zone
|
|
{
|
|
local zne=$1
|
|
local z
|
|
local interface
|
|
|
|
for interface in $ALL_INTERFACES; do
|
|
eval z=\$$(chain_base $interface)_zone
|
|
[ "x${z}" = x${zne} ] && echo $interface
|
|
done
|
|
}
|
|
|
|
#
|
|
# Forward Chain for an interface
|
|
#
|
|
forward_chain() # $1 = interface
|
|
{
|
|
echo $(chain_base $1)_fwd
|
|
}
|
|
|
|
#
|
|
# Input Chain for an interface
|
|
#
|
|
input_chain() # $1 = interface
|
|
{
|
|
echo $(chain_base $1)_in
|
|
}
|
|
|
|
#
|
|
# Output Chain for an interface
|
|
#
|
|
output_chain() # $1 = interface
|
|
{
|
|
echo $(chain_base $1)_out
|
|
}
|
|
|
|
#
|
|
# Masquerade Chain for an interface
|
|
#
|
|
masq_chain() # $1 = interface
|
|
{
|
|
echo $(chain_base $1)_masq
|
|
}
|
|
|
|
#
|
|
# MAC Verification Chain for an interface
|
|
#
|
|
mac_chain() # $1 = interface
|
|
{
|
|
echo $(chain_base $1)_mac
|
|
}
|
|
|
|
macrecent_target() # $1 - interface
|
|
{
|
|
[ -n "$MACLIST_TTL" ] && echo $(chain_base $1)_rec || echo RETURN
|
|
}
|
|
|
|
#
|
|
# Functions for creating dynamic zone rules
|
|
#
|
|
dynamic_fwd() # $1 = interface
|
|
{
|
|
echo $(chain_base $1)_dynf
|
|
}
|
|
|
|
dynamic_in() # $1 = interface
|
|
{
|
|
echo $(chain_base $1)_dyni
|
|
}
|
|
|
|
dynamic_out() # $1 = interface
|
|
{
|
|
echo $(chain_base $1)_dyno
|
|
}
|
|
|
|
dynamic_chains() #$1 = interface
|
|
{
|
|
local c=$(chain_base $1)
|
|
|
|
echo ${c}_dyni ${c}_dynf ${c}_dyno
|
|
}
|
|
|
|
#
|
|
# DNAT Chain from a zone
|
|
#
|
|
dnat_chain() # $1 = zone
|
|
{
|
|
echo ${1}_dnat
|
|
}
|
|
|
|
#
|
|
# SNAT Chain to an interface
|
|
#
|
|
snat_chain() # $1 = interface
|
|
{
|
|
echo $(chain_base $1)_snat
|
|
}
|
|
|
|
#
|
|
# ECN Chain to an interface
|
|
#
|
|
ecn_chain() # $1 = interface
|
|
{
|
|
echo $(chain_base $1)_ecn
|
|
}
|
|
|
|
#
|
|
# First chains for an interface
|
|
#
|
|
first_chains() #$1 = interface
|
|
{
|
|
local c=$(chain_base $1)
|
|
|
|
echo ${c}_fwd ${c}_in
|
|
}
|
|
|
|
#
|
|
# Out Chain to an interface
|
|
#
|
|
out_chain() # $1 = interface
|
|
{
|
|
echo $(chain_base $1)_out
|
|
}
|
|
|
|
#
|
|
# Horrible hack to work around an iptables limitation
|
|
#
|
|
iprange_echo()
|
|
{
|
|
if [ -n "$KLUDGEFREE" ]; then
|
|
echo "-m iprange $@"
|
|
elif [ -f $TMP_DIR/iprange ]; then
|
|
echo $@
|
|
else
|
|
echo "-m iprange $@"
|
|
> $TMP_DIR/iprange
|
|
fi
|
|
}
|
|
|
|
#
|
|
# Get set flags (ipsets).
|
|
#
|
|
get_set_flags() # $1 = set name and optional [levels], $2 = src or dst
|
|
{
|
|
local temp setname=$1 options=$2
|
|
|
|
[ -n "$IPSET_MATCH" ] || fatal_error "Your kernel and/or iptables does not include ipset match: $1"
|
|
|
|
case $1 in
|
|
*\[[1-6]\])
|
|
temp=${1#*\[}
|
|
temp=${temp%\]}
|
|
setname=${1%\[*}
|
|
while [ $temp -gt 1 ]; do
|
|
options="$options,$2"
|
|
temp=$(($temp - 1))
|
|
done
|
|
;;
|
|
*\[*\])
|
|
options=${1#*\[}
|
|
options=${options%\]}
|
|
setname=${1%\[*}
|
|
;;
|
|
*)
|
|
;;
|
|
esac
|
|
|
|
echo "--set ${setname#+} $options"
|
|
}
|
|
|
|
#
|
|
# Horrible hack to work around an iptables limitation
|
|
#
|
|
physdev_echo()
|
|
{
|
|
if [ -n "$KLUDGEFREE" ]; then
|
|
echo -m physdev $@
|
|
elif [ -f $TMP_DIR/physdev ]; then
|
|
echo $@
|
|
else
|
|
echo -m physdev $@
|
|
> $TMP_DIR/physdev
|
|
fi
|
|
}
|
|
|
|
#
|
|
# Source IP range
|
|
#
|
|
source_ip_range() # $1 = Address or Address Range
|
|
{
|
|
[ $# -gt 0 ] && case $1 in
|
|
*.*.*.*-*.*.*.*)
|
|
case $1 in
|
|
!*)
|
|
iprange_echo "! --src-range ${1#!}"
|
|
;;
|
|
*)
|
|
iprange_echo "--src-range $1"
|
|
;;
|
|
esac
|
|
;;
|
|
!+*)
|
|
echo "-m set ! $(get_set_flags ${1#!} src)"
|
|
;;
|
|
+*)
|
|
echo "-m set $(get_set_flags $1 src)"
|
|
;;
|
|
*)
|
|
echo "-s $1"
|
|
;;
|
|
esac
|
|
}
|
|
|
|
#
|
|
# Destination IP range
|
|
#
|
|
dest_ip_range() # $1 = Address or Address Range
|
|
{
|
|
[ $# -gt 0 ] && case $1 in
|
|
*.*.*.*-*.*.*.*)
|
|
case $1 in
|
|
!*)
|
|
iprange_echo "! --dst-range ${1#!}"
|
|
;;
|
|
*)
|
|
iprange_echo "--dst-range $1"
|
|
;;
|
|
esac
|
|
;;
|
|
!+*)
|
|
echo "-m set ! $(get_set_flags ${1#!} dst)"
|
|
;;
|
|
+*)
|
|
echo "-m set $(get_set_flags $1 dst)"
|
|
;;
|
|
*)
|
|
echo "-d $1"
|
|
;;
|
|
esac
|
|
}
|
|
|
|
both_ip_ranges() # $1 = Source address or range, $2 = dest address or range
|
|
{
|
|
local rangeprefix= setprefix= rangematch= setmatch=
|
|
|
|
case $1 in
|
|
*.*.*.*-*.*.*.*)
|
|
rangeprefix="-m iprange"
|
|
rangematch="--src-range $1"
|
|
;;
|
|
!+*)
|
|
setprefix="-m set"
|
|
setmatch="! $(get_set_flags ${1#!} src)"
|
|
;;
|
|
+*)
|
|
setprefix="-m set"
|
|
setmatch="$(get_set_flags $1 src)"
|
|
;;
|
|
*)
|
|
rangematch="-s $1"
|
|
;;
|
|
esac
|
|
|
|
case $2 in
|
|
*.*.*.*-*.*.*.*)
|
|
rangeprefix="-m iprange"
|
|
rangematch="$rangematch --dst-range $2"
|
|
;;
|
|
!+*)
|
|
setprefix="-m set"
|
|
match="$setmatch ! $(get_set_flags ${2#!} dst)"
|
|
;;
|
|
+*)
|
|
setprefix="-m set"
|
|
setmatch="$setmatch $(get_set_flags $2 dst)"
|
|
;;
|
|
*)
|
|
rangematch="$rangematch -d $2"
|
|
;;
|
|
esac
|
|
|
|
echo "$rangeprefix $rangematch $setprefix $setmatch"
|
|
}
|
|
|
|
#
|
|
# We allow hosts to be specified by IP address or by physdev. These two functions
|
|
# are used to produce the proper match in a netfilter rule.
|
|
#
|
|
match_source_hosts()
|
|
{
|
|
if [ -n "$BRIDGING" ]; then
|
|
case $1 in
|
|
*:*)
|
|
physdev_echo "--physdev-in ${1%:*} $(source_ip_range ${1#*:})"
|
|
;;
|
|
*.*.*.*|+*|!+*)
|
|
echo $(source_ip_range $1)
|
|
;;
|
|
*)
|
|
physdev_echo "--physdev-in $1"
|
|
;;
|
|
esac
|
|
else
|
|
echo $(source_ip_range $1)
|
|
fi
|
|
}
|
|
|
|
match_dest_hosts()
|
|
{
|
|
if [ -n "$BRIDGING" ]; then
|
|
case $1 in
|
|
*:*)
|
|
physdev_echo "--physdev-out ${1%:*} $(dest_ip_range ${1#*:})"
|
|
;;
|
|
*.*.*.*|+*|!+*)
|
|
echo $(dest_ip_range $1)
|
|
;;
|
|
*)
|
|
physdev_echo "--physdev-out $1"
|
|
;;
|
|
esac
|
|
else
|
|
echo $(dest_ip_range $1)
|
|
fi
|
|
}
|
|
#
|
|
# Matches for either <address-range> or <interface>:<address range>
|
|
#
|
|
match_source()
|
|
{
|
|
case "$1" in
|
|
*:*)
|
|
echo "-i ${1%%:*} $(match_source_hosts ${1#*:})"
|
|
;;
|
|
*)
|
|
echo $(dest_ip_range $1)
|
|
;;
|
|
esac
|
|
}
|
|
|
|
match_dest()
|
|
{
|
|
case "$1" in
|
|
*:*)
|
|
echo "-o ${1%%:*} $(match_dest_hosts ${1#*:})"
|
|
;;
|
|
*)
|
|
echo $(dest_ip_range $1)
|
|
;;
|
|
esac
|
|
}
|
|
|
|
#
|
|
# Similarly, the source or destination in a rule can be qualified by a device name. If
|
|
# the device is defined in ${CONFDIR}/interfaces then a normal interface match is
|
|
# generated (-i or -o); otherwise, a physdev match is generated.
|
|
#-------------------------------------------------------------------------------------
|
|
#
|
|
# loosely match the passed interface with those in ${CONFDIR}/interfaces.
|
|
#
|
|
known_interface() # $1 = interface name
|
|
{
|
|
local iface
|
|
|
|
for iface in $ALL_INTERFACES ; do
|
|
if if_match $iface $1 ; then
|
|
return 0
|
|
fi
|
|
done
|
|
|
|
return 1
|
|
}
|
|
|
|
known_port() # $1 = port name
|
|
{
|
|
local port
|
|
|
|
for port in $ALL_PORTS ; do
|
|
if if_match $port $1 ; then
|
|
return 0
|
|
fi
|
|
done
|
|
|
|
return 1
|
|
}
|
|
|
|
match_source_dev()
|
|
{
|
|
if [ -n "$BRIDGING" ]; then
|
|
known_port $1 && physdev_echo "--physdev-in $1" || echo -i $1
|
|
elif known_interface $1; then
|
|
echo -i $1
|
|
elif [ -n "$PHYSDEV_MATCH" ]; then
|
|
physdev_echo "--physdev-in $1"
|
|
else
|
|
echo -i $1
|
|
fi
|
|
}
|
|
|
|
match_dest_dev()
|
|
{
|
|
if [ -n "$BRIDGING" ]; then
|
|
known_port $1 && physdev_echo "--physdev-out $1" || echo -o $1
|
|
elif known_interface $1; then
|
|
echo -o $1
|
|
elif [ -n "$PHYSDEV_MATCH" ]; then
|
|
physdev_echo "--physdev-out $1"
|
|
else
|
|
echo -o $1
|
|
fi
|
|
}
|
|
|
|
verify_interface()
|
|
{
|
|
known_interface $1 || { [ -n "$BRIDGING" ] && known_port $1 ; }
|
|
}
|
|
|
|
#
|
|
# Determine if communication to/from a host is encrypted using IPSEC
|
|
#
|
|
is_ipsec_host() # $1 = zone, $2 = host
|
|
{
|
|
eval local is_ipsec=\$${1}_is_ipsec
|
|
eval local hosts=\"\$${1}_ipsec_hosts\"
|
|
|
|
test -n "$is_ipsec" || list_search $2 $hosts
|
|
}
|
|
|
|
#
|
|
# Generate a match for decrypted packets
|
|
#
|
|
match_ipsec_in() # $1 = zone, $2 = host
|
|
{
|
|
if is_ipsec_host $1 $2 ; then
|
|
eval local options=\"\$${1}_ipsec_options \$${1}_ipsec_in_options\"
|
|
echo "-m policy --pol ipsec --dir in $options"
|
|
elif [ -n "$POLICY_MATCH" ]; then
|
|
echo "-m policy --pol none --dir in"
|
|
fi
|
|
}
|
|
|
|
#
|
|
# Generate a match for packets that will be encrypted
|
|
#
|
|
match_ipsec_out() # $1 = zone, $2 = host
|
|
{
|
|
if is_ipsec_host $1 $2 ; then
|
|
eval local options=\"\$${1}_ipsec_options \$${1}_ipsec_out_options\"
|
|
echo "-m policy --pol ipsec --dir out $options"
|
|
elif [ -n "$POLICY_MATCH" ]; then
|
|
echo "-m policy --pol none --dir out"
|
|
fi
|
|
}
|
|
|
|
#
|
|
# Jacket for ip_range() that takes care of iprange match
|
|
#
|
|
|
|
firewall_ip_range() # $1 = IP address or range
|
|
{
|
|
[ -n "$IPRANGE_MATCH" ] && echo $1 || ip_range $1
|
|
}
|
|
|
|
#
|
|
#
|
|
# Find hosts in a given zone
|
|
#
|
|
# Read hosts file and for each record matching the passed ZONE,
|
|
# echo the expanded contents of the "HOST(S)" column
|
|
#
|
|
find_hosts() # $1 = host zone
|
|
{
|
|
local hosts interface address addresses
|
|
|
|
while read z hosts options; do
|
|
if [ "x$(expand $z)" = "x$1" ]; then
|
|
expandv hosts
|
|
interface=${hosts%%:*}
|
|
addresses=${hosts#*:}
|
|
case $addresses in
|
|
!*)
|
|
echo $interface:0.0.0.0/0
|
|
;;
|
|
*)
|
|
for address in $(separate_list ${addresses%%!*}); do
|
|
echo $interface:$address
|
|
done
|
|
;;
|
|
esac
|
|
fi
|
|
done < $TMP_DIR/hosts
|
|
}
|
|
|
|
#
|
|
#
|
|
# Find exclusions in a given zone
|
|
#
|
|
# Read hosts file and for each record matching the passed ZONE,
|
|
# echo any exclusions
|
|
#
|
|
find_exclusions() # $1 = host zone
|
|
{
|
|
local hosts interface address addresses
|
|
|
|
while read z hosts options; do
|
|
if [ "x$(expand $z)" = "x$1" ]; then
|
|
expandv hosts
|
|
interface=${hosts%%:*}
|
|
addresses=${hosts#*:}
|
|
case $addresses in
|
|
*!*)
|
|
for address in $(separate_list ${addresses#*!}); do
|
|
echo $interface:$address
|
|
done
|
|
;;
|
|
esac
|
|
fi
|
|
done < $TMP_DIR/hosts
|
|
}
|
|
|
|
#
|
|
# Determine the interfaces on the firewall
|
|
#
|
|
# For each zone, create a variable called ${zone}_interfaces. This
|
|
# variable contains a space-separated list of interfaces to the zone
|
|
#
|
|
determine_interfaces() {
|
|
for zone in $ZONES; do
|
|
interfaces=$(find_interfaces $zone)
|
|
interfaces=$(echo $interfaces) # Remove extra trash
|
|
eval ${zone}_interfaces=\"\$interfaces\"
|
|
done
|
|
}
|
|
|
|
#
|
|
# Determine if an interface has a given option
|
|
#
|
|
interface_has_option() # $1 = interface, #2 = option
|
|
{
|
|
local options
|
|
|
|
eval options=\$$(chain_base $1)_options
|
|
|
|
list_search $2 $options
|
|
}
|
|
|
|
#
|
|
# Determine the defined hosts in each zone
|
|
#
|
|
determine_hosts() {
|
|
for zone in $ZONES; do
|
|
hosts=$(find_hosts $zone)
|
|
hosts=$(echo $hosts) # Remove extra trash
|
|
exclusions=$(find_exclusions $zone)
|
|
exclusions=$(echo $exclusions) # Remove extra trash
|
|
|
|
eval interfaces=\$${zone}_interfaces
|
|
|
|
for interface in $interfaces; do
|
|
if interface_has_option $interface detectnets; then
|
|
networks=$(get_routed_networks $interface "detectnets not allowed on interface with default route - $interface" )
|
|
else
|
|
networks=0.0.0.0/0
|
|
fi
|
|
|
|
for network in $networks; do
|
|
if [ -z "$hosts" ]; then
|
|
hosts=$interface:$network
|
|
else
|
|
hosts="$hosts $interface:$network"
|
|
fi
|
|
|
|
if interface_has_option $interface routeback; then
|
|
eval ${zone}_routeback=\"$interface:$network \$${zone}_routeback\"
|
|
fi
|
|
done
|
|
done
|
|
|
|
interfaces=
|
|
|
|
for host in $hosts; do
|
|
interface=${host%:*}
|
|
if list_search $interface $interfaces; then
|
|
list_search $interface:0.0.0.0/0 $hosts && \
|
|
startup_error "Invalid zone definition for zone $zone"
|
|
list_search $interface:0/0 $hosts && \
|
|
startup_error "Invalid zone definition for zone $zone"
|
|
eval ${zone}_is_complex=Yes
|
|
else
|
|
if [ -z "$interfaces" ]; then
|
|
interfaces=$interface
|
|
else
|
|
interfaces="$interfaces $interface"
|
|
fi
|
|
fi
|
|
done
|
|
|
|
eval ${zone}_exclusions="\$exclusions"
|
|
eval ${zone}_interfaces="\$interfaces"
|
|
eval ${zone}_hosts="\$hosts"
|
|
|
|
if [ -n "$hosts" ]; then
|
|
if [ $VERBOSE -ge 1 ]; then
|
|
[ -n "$exclusions" ] && display_list "$zone Zone:" $hosts minus "($exclusions)" || display_list "$zone Zone:" $hosts
|
|
fi
|
|
else
|
|
error_message "WARNING: Zone $zone is empty"
|
|
fi
|
|
done
|
|
}
|
|
|
|
#
|
|
# Ensure that the passed zone is defined in the zones file or is the firewall
|
|
#
|
|
validate_zone() # $1 = zone
|
|
{
|
|
list_search $1 $ZONES $FW
|
|
}
|
|
#
|
|
# Ensure that the passed zone is defined in the zones file.
|
|
#
|
|
validate_zone1() # $1 = zone
|
|
{
|
|
list_search $1 $ZONES
|
|
}
|
|
|
|
#
|
|
# Format a match by the passed MAC address
|
|
# The passed address begins with "~" and uses "-" as a separator between bytes
|
|
# Example: ~01-02-03-04-05-06
|
|
#
|
|
mac_match() # $1 = MAC address formated as described above
|
|
{
|
|
echo "--match mac --mac-source $(echo $1 | sed 's/~//;s/-/:/g')"
|
|
}
|
|
|
|
#
|
|
# Find interfaces that have the passed option specified
|
|
#
|
|
find_interfaces_by_option() # $1 = option
|
|
{
|
|
for interface in $ALL_INTERFACES; do
|
|
eval options=\$$(chain_base $interface)_options
|
|
list_search $1 $options && echo $interface
|
|
done
|
|
}
|
|
|
|
#
|
|
# This slightly slower version is used to find both the option and option followed
|
|
# by equal sign ("=") and a value
|
|
#
|
|
find_interfaces_by_option1() # $1 = option
|
|
{
|
|
local options option
|
|
|
|
for interface in $ALL_INTERFACES; do
|
|
eval options=\$$(chain_base $interface)_options
|
|
for option in $options; do
|
|
if [ "${option%=*}" = "$1" ]; then
|
|
echo $interface
|
|
break
|
|
fi
|
|
done
|
|
done
|
|
}
|
|
|
|
#
|
|
# Find hosts with the passed option
|
|
#
|
|
find_hosts_by_option() # $1 = option
|
|
{
|
|
local ignore hosts interface address addresses options ipsec= list
|
|
|
|
while read ignore hosts options; do
|
|
expandv options
|
|
list=$(separate_list $options)
|
|
if list_search $1 $list; then
|
|
list_search ipsec $list && ipsec=ipsec || ipsec=none
|
|
expandv hosts
|
|
interface=${hosts%%:*}
|
|
addresses=${hosts#*:}
|
|
for address in $(separate_list $addresses); do
|
|
echo ${ipsec}^$interface:$address
|
|
done
|
|
fi
|
|
done < $TMP_DIR/hosts
|
|
|
|
for interface in $ALL_INTERFACES; do
|
|
interface_has_option $interface $1 && \
|
|
echo none^${interface}:0.0.0.0/0
|
|
done
|
|
}
|
|
|
|
#
|
|
# Process the routestopped file either adding or deleting rules
|
|
#
|
|
process_routestopped() # $1 = command
|
|
{
|
|
local hosts= interface host host1 options networks source= dest= matched
|
|
|
|
while read interface host options; do
|
|
expandv interface host options
|
|
[ "x$host" = "x-" -o -z "$host" ] && host=0.0.0.0/0
|
|
for h in $(separate_list $host); do
|
|
hosts="$hosts $interface:$h"
|
|
done
|
|
|
|
routeback=
|
|
|
|
if [ -n "$options" ]; then
|
|
for option in $(separate_list $options); do
|
|
case $option in
|
|
routeback)
|
|
if [ -n "$routeback" ]; then
|
|
error_message "WARNING: Duplicate routestopped option ignored: routeback"
|
|
else
|
|
routeback=Yes
|
|
for h in $(separate_list $host); do
|
|
run_iptables $1 FORWARD -i $interface -o $interface $(both_ip_ranges $h $h) -j ACCEPT
|
|
done
|
|
fi
|
|
;;
|
|
source)
|
|
for h in $(separate_list $host); do
|
|
source="$source $interface:$h"
|
|
done
|
|
;;
|
|
dest)
|
|
for h in $(separate_list $host); do
|
|
dest="$dest $interface:$h"
|
|
done
|
|
;;
|
|
critical)
|
|
;;
|
|
*)
|
|
error_message "WARNING: Unknown routestopped option ignored: $option"
|
|
;;
|
|
esac
|
|
done
|
|
fi
|
|
|
|
done < $TMP_DIR/routestopped
|
|
|
|
|
|
for host in $hosts; do
|
|
interface=${host%:*}
|
|
networks=${host#*:}
|
|
source_range=$(source_ip_range $networks)
|
|
dest_range=$(dest_ip_range $networks)
|
|
run_iptables $1 INPUT -i $interface $source_range -j ACCEPT
|
|
[ -z "$ADMINISABSENTMINDED" ] && \
|
|
run_iptables $1 OUTPUT -o $interface $dest_range -j ACCEPT
|
|
|
|
matched=
|
|
|
|
if list_search $host $source ; then
|
|
run_iptables $1 FORWARD -i $interface $source_range -j ACCEPT
|
|
matched=Yes
|
|
fi
|
|
|
|
if list_search $host $dest ; then
|
|
run_iptables $1 FORWARD -o $interface $dest_range -j ACCEPT
|
|
matched=Yes
|
|
fi
|
|
|
|
if [ -z "$matched" ]; then
|
|
for host1 in $hosts; do
|
|
[ "$host" != "$host1" ] && run_iptables $1 FORWARD -i $interface -o ${host1%:*} $(both_ip_ranges $networks ${host1#*:}) -j ACCEPT
|
|
done
|
|
fi
|
|
done
|
|
}
|
|
|
|
process_criticalhosts()
|
|
{
|
|
local hosts= interface host h options networks criticalhosts=
|
|
|
|
strip_file routestopped
|
|
|
|
while read interface host options; do
|
|
expandv interface host options
|
|
|
|
[ "x$host" = "x-" -o -z "$host" ] && host=0.0.0.0/0 || host=$(separate_list $host)
|
|
|
|
if [ -n "$options" ]; then
|
|
for option in $(separate_list $options); do
|
|
case $option in
|
|
routeback|source|dest)
|
|
;;
|
|
critical)
|
|
for h in $host; do
|
|
criticalhosts="$criticalhosts $interface:$h"
|
|
done
|
|
;;
|
|
*)
|
|
error_message "WARNING: Unknown routestopped option ignored: $option"
|
|
;;
|
|
esac
|
|
done
|
|
fi
|
|
done < $TMP_DIR/routestopped
|
|
|
|
if [ -n "$criticalhosts" ]; then
|
|
CRITICALHOSTS=$criticalhosts
|
|
progress_message "Critical Hosts are:$CRITICALHOSTS"
|
|
fi
|
|
|
|
}
|
|
|
|
#
|
|
# 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=`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-$$
|
|
;;
|
|
*)
|
|
error_message "ERROR:Internal error in mktempfile"
|
|
;;
|
|
esac
|
|
fi
|
|
}
|
|
|
|
#
|
|
# create a temporary directory
|
|
#
|
|
mktempdir() {
|
|
|
|
[ -z "$MKTEMP" ] && find_mktemp
|
|
|
|
case "$MKTEMP" in
|
|
STD)
|
|
mktemp -td shorewall.XXXXXX
|
|
;;
|
|
None|BSD)
|
|
#
|
|
# Not all versions of the BSD mktemp support the -d option under Linux
|
|
#
|
|
qt rm -rf /tmp/shorewall-$$
|
|
mkdir -p /tmp/shorewall-$$ && chmod 700 /tmp/shorewall-$$ && echo /tmp/shorewall-$$
|
|
;;
|
|
*)
|
|
error_message "ERROR:Internal error in mktempdir"
|
|
;;
|
|
esac
|
|
}
|
|
|
|
#
|
|
# Read a file and handle "INCLUDE" directives
|
|
#
|
|
|
|
read_file() # $1 = file name, $2 = nest count
|
|
{
|
|
local first rest
|
|
|
|
if [ -f $1 ]; then
|
|
while read first rest; do
|
|
if [ "x$first" = "xINCLUDE" ]; then
|
|
if [ $2 -lt 4 ]; then
|
|
read_file $(find_file $(expand ${rest%#*})) $(($2 + 1))
|
|
else
|
|
error_message "WARNING: INCLUDE in $1 ignored (nested too deeply)"
|
|
fi
|
|
else
|
|
echo "$first $rest"
|
|
fi
|
|
done < $1
|
|
else
|
|
[ -n "$TERMINATOR" ] && $TERMINATOR "No such file: $1"
|
|
echo "WARNING -- No such file: $1"
|
|
fi
|
|
}
|
|
|
|
#
|
|
# Function for including one file into another
|
|
#
|
|
INCLUDE() {
|
|
. $(find_file $(expand $@))
|
|
}
|
|
|
|
#
|
|
# Strip comments and blank lines from a file and place the result in the
|
|
# temporary directory
|
|
#
|
|
strip_file() # $1 = Base Name of the file, $2 = Full Name of File (optional)
|
|
{
|
|
local fname
|
|
|
|
if [ ! -f $TMP_DIR/$1 ]; then
|
|
[ $# = 1 ] && fname=$(find_file $1) || fname=$2
|
|
|
|
if [ -f $fname ]; then
|
|
read_file $fname 0 | cut -d'#' -f1 | grep -v '^[[:space:]]*$' > $TMP_DIR/$1
|
|
else
|
|
> $TMP_DIR/$1
|
|
fi
|
|
fi
|
|
}
|
|
|
|
#
|
|
# Strip the passed file.
|
|
#
|
|
# Return success if
|
|
# a) the stripped file is non-empty and the library was successfully loaded; or
|
|
# b) the stripped file is empty but the library had been loaded previously
|
|
#
|
|
strip_file_and_lib_load() # $1 = logical file name, $2 = library to load if the stripped file is non-empty
|
|
{
|
|
local f=$(find_file $1)
|
|
|
|
strip_file $1 $f
|
|
|
|
if [ -s $TMP_DIR/$1 ]; then
|
|
lib_load $2 "A non-empty $1 file ($f)"
|
|
return 0
|
|
fi
|
|
|
|
eval test -n \"\$LIB_${2}_LOADED\"
|
|
}
|
|
|
|
#
|
|
# Check that a mark value or mask is less that 256 or that it is less than 65536 and
|
|
# that it's lower 8 bits are zero.
|
|
#
|
|
verify_mark() # $1 = value to test
|
|
{
|
|
verify_mark2()
|
|
{
|
|
case $1 in
|
|
0*)
|
|
[ $(($1)) -lt 256 ] && return 0
|
|
[ -n "$HIGH_ROUTE_MARKS" ] || return 1
|
|
[ $(($1)) -gt 65535 ] && return 1
|
|
return $(($1 & 0xFF))
|
|
;;
|
|
[1-9]*)
|
|
[ $1 -lt 256 ] && return 0
|
|
[ -n "$HIGH_ROUTE_MARKS" ] || return 1
|
|
[ $1 -gt 65535 ] && return 1
|
|
return $(($1 & 0xFF))
|
|
;;
|
|
*)
|
|
return 2
|
|
;;
|
|
esac
|
|
}
|
|
|
|
verify_mark2 $1 || fatal_error "Invalid Mark or Mask value: $1"
|
|
}
|
|
|
|
#
|
|
# Determine the value for a parameter that defaults to Yes
|
|
#
|
|
added_param_value_yes() # $1 = Parameter Name, $2 = Parameter value
|
|
{
|
|
local val="$2"
|
|
|
|
if [ -z "$val" ]; then
|
|
echo "Yes"
|
|
else case $val in
|
|
[Yy][Ee][Ss])
|
|
echo "Yes"
|
|
;;
|
|
[Nn][Oo])
|
|
echo ""
|
|
;;
|
|
*)
|
|
startup_error "Invalid value ($val) for $1"
|
|
;;
|
|
esac
|
|
fi
|
|
}
|
|
|
|
#
|
|
# Determine the value for a parameter that defaults to No
|
|
#
|
|
added_param_value_no() # $1 = Parameter Name, $2 = Parameter value
|
|
{
|
|
local val="$2"
|
|
|
|
if [ -z "$val" ]; then
|
|
echo ""
|
|
else case $val in
|
|
[Yy][Ee][Ss])
|
|
echo "Yes"
|
|
;;
|
|
[Nn][Oo])
|
|
echo ""
|
|
;;
|
|
*)
|
|
startup_error "Invalid value ($val) for $1"
|
|
;;
|
|
esac
|
|
fi
|
|
}
|
|
|
|
#
|
|
# Initialize this program
|
|
#
|
|
do_initialize() {
|
|
|
|
# Run all utility programs using the C locale
|
|
#
|
|
# Thanks to Vincent Planchenault for this tip #
|
|
|
|
export LC_ALL=C
|
|
|
|
# Make sure umask is sane
|
|
umask 077
|
|
|
|
PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin
|
|
#
|
|
# Establish termination function
|
|
#
|
|
TERMINATOR=fatal_error
|
|
#
|
|
# Clear all configuration variables
|
|
#
|
|
VERSION=
|
|
IPTABLES=
|
|
FW=
|
|
SUBSYSLOCK=
|
|
ALLOWRELATED=Yes
|
|
LOGRATE=
|
|
LOGBURST=
|
|
ADD_IP_ALIASES=
|
|
ADD_SNAT_ALIASES=
|
|
TC_ENABLED=
|
|
BLACKLIST_DISPOSITION=
|
|
BLACKLIST_LOGLEVEL=
|
|
CLAMPMSS=
|
|
ROUTE_FILTER=
|
|
LOG_MARTIANS=
|
|
DETECT_DNAT_IPADDRS=
|
|
MUTEX_TIMEOUT=
|
|
FORWARDPING=
|
|
MACLIST_DISPOSITION=
|
|
MACLIST_LOG_LEVEL=
|
|
TCP_FLAGS_DISPOSITION=
|
|
TCP_FLAGS_LOG_LEVEL=
|
|
RFC1918_LOG_LEVEL=
|
|
MARK_IN_FORWARD_CHAIN=
|
|
VERSION_FILE=
|
|
LOGFORMAT=
|
|
LOGRULENUMBERS=
|
|
ADMINISABSENTMINDED=
|
|
BLACKLISTNEWONLY=
|
|
MODULE_SUFFIX=
|
|
ACTIONS=
|
|
USEDACTIONS=
|
|
SMURF_LOG_LEVEL=
|
|
DISABLE_IPV6=
|
|
BRIDGING=
|
|
DYNAMIC_ZONES=
|
|
PKTTYPE=
|
|
USEPKTYPE=
|
|
RETAIN_ALIASES=
|
|
DELAYBLACKLISTLOAD=
|
|
LOGTAGONLY=
|
|
LOGALLNEW=
|
|
RFC1918_STRICT=
|
|
MACLIST_TTL=
|
|
SAVE_IPSETS=
|
|
RESTOREFILE=
|
|
MAPOLDACTIONS=
|
|
IMPLICIT_CONTINUE=
|
|
HIGH_ROUTE_MARKS=
|
|
TC_EXPERT=
|
|
MODULESDIR=
|
|
IPSECFILE=
|
|
IP_FORWARDING=
|
|
CLEAR_TC=
|
|
MACLIST_TABLE=
|
|
FASTACCEPT=
|
|
USE_ACTIONS=
|
|
DROP_DEFAULT=
|
|
REJECT_DEFAULT=
|
|
ACCEPT_DEFAULT=
|
|
QUEUE_DEFAULT=
|
|
OPTIMIZE=
|
|
|
|
LOGLIMIT=
|
|
LOGPARMS=
|
|
OUTPUT=
|
|
TMP_DIR=
|
|
ALL_INTERFACES=
|
|
ROUTEMARK_INTERFACES=
|
|
IPSECMARK=256
|
|
PROVIDERS=
|
|
CRITICALHOSTS=
|
|
EXCLUSION_SEQ=1
|
|
STOPPING=
|
|
HAVE_MUTEX=
|
|
ALIASES_TO_ADD=
|
|
SECTION=ESTABLISHED
|
|
SECTIONS=
|
|
ALL_PORTS=
|
|
DEFAULT_MACROS=
|
|
COMMENT=
|
|
|
|
TMP_DIR=$(mktempdir)
|
|
|
|
[ -n "$TMP_DIR" ] && chmod 700 $TMP_DIR || \
|
|
fatal_error "Can't create a temporary directory"
|
|
|
|
case $PROGRAM in
|
|
compiler)
|
|
trap "[ -n "$OUTPUT" ] && rm -f $OUTPUT;rm -rf $TMP_DIR; exit 2" 1 2 3 4 5 6 9
|
|
;;
|
|
firewall)
|
|
trap "[ -n "$RESTOREBASE" ] && rm -f $RESTOREBASE;rm -rf $TMP_DIR; my_mutex_off; exit 2" 1 2 3 4 5 6 9
|
|
;;
|
|
esac
|
|
|
|
ensure_config_path
|
|
|
|
VERSION_FILE=$SHAREDIR/version
|
|
|
|
[ -f $VERSION_FILE ] && VERSION=$(cat $VERSION_FILE)
|
|
|
|
run_user_exit params
|
|
|
|
config=$(find_file shorewall.conf)
|
|
|
|
if [ -f $config ]; then
|
|
if [ -r $config ]; then
|
|
progress_message "Processing $config..."
|
|
. $config
|
|
else
|
|
fatal_error "Cannot read $config (Hint: Are you root?)"
|
|
fi
|
|
else
|
|
fatal_error "$config does not exist!"
|
|
fi
|
|
|
|
#
|
|
# Restore CONFIG_PATH if the shorewall.conf file cleared it
|
|
#
|
|
ensure_config_path
|
|
#
|
|
# Determine the capabilities of the installed iptables/netfilter
|
|
# We load the kernel modules here to accurately determine
|
|
# capabilities when module autoloading isn't enabled.
|
|
#
|
|
PKTTYPE=$(added_param_value_no PKTTYPE $PKTTYPE)
|
|
|
|
[ -n "${MODULE_SUFFIX:=o gz ko o.gz ko.gz}" ]
|
|
|
|
if [ -z "$EXPORT" -a "$(whoami)" = root ]; then
|
|
|
|
load_kernel_modules
|
|
|
|
if [ -z "$IPTABLES" ]; then
|
|
IPTABLES=$(mywhich iptables 2> /dev/null)
|
|
|
|
[ -z "$IPTABLES" ] && fatal_error "Can't find iptables executable"
|
|
else
|
|
[ -e "$IPTABLES" ] || fatal_error "\$IPTABLES=$IPTABLES does not exist or is not executable"
|
|
fi
|
|
determine_capabilities
|
|
|
|
else
|
|
f=$(find_file capabilities)
|
|
|
|
[ -f $f ] && . $f || fatal_error "The -e flag requires a capabilities file"
|
|
fi
|
|
|
|
ALLOWRELATED="$(added_param_value_yes ALLOWRELATED $ALLOWRELATED)"
|
|
[ -n "$ALLOWRELATED" ] || \
|
|
fatal_error "ALLOWRELATED=No is not supported"
|
|
ADD_IP_ALIASES="$(added_param_value_yes ADD_IP_ALIASES $ADD_IP_ALIASES)"
|
|
|
|
if [ -n "${LOGRATE}${LOGBURST}" ]; then
|
|
LOGLIMIT="--match limit"
|
|
[ -n "$LOGRATE" ] && LOGLIMIT="$LOGLIMIT --limit $LOGRATE"
|
|
[ -n "$LOGBURST" ] && LOGLIMIT="$LOGLIMIT --limit-burst $LOGBURST"
|
|
fi
|
|
|
|
if [ -n "$IP_FORWARDING" ]; then
|
|
case "$IP_FORWARDING" in
|
|
[Oo][Nn]|[Oo][Ff][Ff]|[Kk][Ee][Ee][Pp])
|
|
;;
|
|
*)
|
|
fatal_error "Invalid value ($IP_FORWARDING) for IP_FORWARDING"
|
|
;;
|
|
esac
|
|
else
|
|
IP_FORWARDING=On
|
|
fi
|
|
|
|
[ -n "${BLACKLIST_DISPOSITION:=DROP}" ]
|
|
|
|
case "$CLAMPMSS" in
|
|
[0-9]*)
|
|
;;
|
|
*)
|
|
CLAMPMSS=$(added_param_value_no CLAMPMSS $CLAMPMSS)
|
|
;;
|
|
esac
|
|
|
|
ADD_SNAT_ALIASES=$(added_param_value_no ADD_SNAT_ALIASES $ADD_SNAT_ALIASES)
|
|
ROUTE_FILTER=$(added_param_value_no ROUTE_FILTER $ROUTE_FILTER)
|
|
LOG_MARTIANS=$(added_param_value_no LOG_MARTIANS $LOG_MARTIANS)
|
|
DETECT_DNAT_IPADDRS=$(added_param_value_no DETECT_DNAT_IPADDRS $DETECT_DNAT_IPADDRS)
|
|
FORWARDPING=$(added_param_value_no FORWARDPING $FORWARDPING)
|
|
[ -n "$FORWARDPING" ] && \
|
|
fatal_error "FORWARDPING=Yes is no longer supported"
|
|
|
|
MACLIST_TARGET=reject
|
|
|
|
if [ -n "$MACLIST_DISPOSITION" ] ; then
|
|
case $MACLIST_DISPOSITION in
|
|
REJECT)
|
|
;;
|
|
DROP)
|
|
MACLIST_TARGET=DROP
|
|
;;
|
|
ACCEPT)
|
|
MACLIST_TARGET=RETURN
|
|
;;
|
|
*)
|
|
fatal_error "Invalid value ($MACLIST_DISPOSITION) for MACLIST_DISPOSITION"
|
|
;;
|
|
esac
|
|
else
|
|
MACLIST_DISPOSITION=REJECT
|
|
fi
|
|
|
|
if [ -n "$TCP_FLAGS_DISPOSITION" ] ; then
|
|
case $TCP_FLAGS_DISPOSITION in
|
|
REJECT|ACCEPT|DROP)
|
|
;;
|
|
*)
|
|
fatal_error "Invalid value ($TCP_FLAGS_DISPOSITION) for TCP_FLAGS_DISPOSITION"
|
|
;;
|
|
esac
|
|
else
|
|
TCP_FLAGS_DISPOSITION=DROP
|
|
fi
|
|
|
|
[ -n "${RFC1918_LOG_LEVEL:=info}" ]
|
|
|
|
MARK_IN_FORWARD_CHAIN=$(added_param_value_no MARK_IN_FORWARD_CHAIN $MARK_IN_FORWARD_CHAIN)
|
|
[ -n "$MARK_IN_FORWARD_CHAIN" ] && MARKING_CHAIN=tcfor || MARKING_CHAIN=tcpre
|
|
CLEAR_TC=$(added_param_value_yes CLEAR_TC $CLEAR_TC)
|
|
|
|
if [ -n "$LOGFORMAT" ]; then
|
|
if [ -n "$(echo $LOGFORMAT | grep '%d')" ]; then
|
|
LOGRULENUMBERS=Yes
|
|
temp=$(printf "$LOGFORMAT" fooxx2barxx 1 ACCEPT 2> /dev/null)
|
|
if [ $? -ne 0 ]; then
|
|
fatal_error "Invalid LOGFORMAT string: \"$LOGFORMAT\""
|
|
fi
|
|
else
|
|
temp=$(printf "$LOGFORMAT" fooxx2barxx ACCEPT 2> /dev/null)
|
|
if [ $? -ne 0 ]; then
|
|
fatal_error "Invalid LOGFORMAT string: \"$LOGFORMAT\""
|
|
fi
|
|
fi
|
|
|
|
[ ${#temp} -le 29 ] || fatal_error "LOGFORMAT string is longer than 29 characters: \"$LOGFORMAT\""
|
|
|
|
MAXZONENAMELENGTH=$(( 5 + ( ( 29 - ${#temp}) / 2) ))
|
|
MAXZONENAMELENGTH=${MAXZONENAMELENGTH%.*}
|
|
else
|
|
LOGFORMAT="Shorewall:%s:%s:"
|
|
MAXZONENAMELENGTH=5
|
|
fi
|
|
|
|
ADMINISABSENTMINDED=$(added_param_value_no ADMINISABSENTMINDED $ADMINISABSENTMINDED)
|
|
BLACKLISTNEWONLY=$(added_param_value_no BLACKLISTNEWONLY $BLACKLISTNEWONLY)
|
|
DISABLE_IPV6=$(added_param_value_no DISABLE_IPV6 $DISABLE_IPV6)
|
|
BRIDGING=$(added_param_value_no BRIDGING $BRIDGING)
|
|
|
|
DYNAMIC_ZONES=$(added_param_value_no DYNAMIC_ZONES $DYNAMIC_ZONES)
|
|
if [ -n "$DYNAMIC_ZONES" ]; then
|
|
[ -n "$EXPORT" ] && fatal_error "DYNAMIC_ZONES=Yes is incompatible with the -e option"
|
|
lib_avail dynamiczones || error_message "WARNING: DYNAMIC_ZONES=Yes requires the Shorewall dynamiczones library (${SHAREDIR}/lib.dynamiczones) which is not installed"
|
|
fi
|
|
|
|
STARTUP_ENABLED=$(added_param_value_yes STARTUP_ENABLED $STARTUP_ENABLED)
|
|
RETAIN_ALIASES=$(added_param_value_no RETAIN_ALIASES $RETAIN_ALIASES)
|
|
[ -n "${ADD_IP_ALIASES}${ADD_SNAT_ALIASES}" ] || RETAIN_ALIASES=
|
|
DELAYBLACKLISTLOAD=$(added_param_value_no DELAYBLACKLISTLOAD $DELAYBLACKLISTLOAD)
|
|
LOGTAGONLY=$(added_param_value_no LOGTAGONLY $LOGTAGONLY)
|
|
RFC1918_STRICT=$(added_param_value_no RFC1918_STRICT $RFC1918_STRICT)
|
|
SAVE_IPSETS=$(added_param_value_no SAVE_IPSETS $SAVE_IPSETS)
|
|
MAPOLDACTIONS=$(added_param_value_yes MAPOLDACTIONS $MAPOLDACTIONS)
|
|
FASTACCEPT=$(added_param_value_no FASTACCEPT $FASTACCEPT)
|
|
IMPLICIT_CONTINUE=$(added_param_value_no IMPLICIT_CONTINUE $IMPLICIT_CONTINUE)
|
|
HIGH_ROUTE_MARKS=$(added_param_value_no HIGH_ROUTE_MARKS $HIGH_ROUTE_MARKS)
|
|
TC_EXPERT=$(added_param_value_no TC_EXPERT $TC_EXPERT)
|
|
USE_ACTIONS=$(added_param_value_yes USE_ACTIONS $USE_ACTIONS)
|
|
[ -n "$USE_ACTIONS" ] && lib_load actions "USE_ACTIONS=Yes"
|
|
|
|
[ -n "$XCONNMARK_MATCH" ] || XCONNMARK=
|
|
[ -n "$XMARK" ] || XCONNMARK=
|
|
|
|
[ -n "$HIGH_ROUTE_MARKS" -a -z "$XCONNMARK" ] && fatal_error "HIGH_ROUTE_MARKS=Yes requires extended CONNMARK target, extended CONNMARK match support and extended MARK support"
|
|
|
|
case ${IPSECFILE:=ipsec} in
|
|
ipsec|zones)
|
|
;;
|
|
*)
|
|
fatal_error "Invalid value ($IPSECFILE) for IPSECFILE option"
|
|
;;
|
|
esac
|
|
|
|
case ${MACLIST_TABLE:=filter} in
|
|
filter)
|
|
;;
|
|
mangle)
|
|
[ $MACLIST_DISPOSITION = reject ] && fatal_error "MACLIST_DISPOSITION=REJECT is not allowed with MACLIST_TABLE=mangle"
|
|
;; *)
|
|
fatal_error "Invalid value ($MACLIST_TABLE) for MACLIST_TABLE option"
|
|
;;
|
|
esac
|
|
|
|
TC_SCRIPT=
|
|
|
|
if [ -n "$TC_ENABLED" ] ; then
|
|
case "$TC_ENABLED" in
|
|
[Yy][Ee][Ss])
|
|
TC_ENABLED=Yes
|
|
TC_SCRIPT=$(find_file tcstart)
|
|
[ -f $TC_SCRIPT ] || fatal_error "Unable to find tcstart file"
|
|
;;
|
|
[Ii][Nn][Tt][Ee][Rr][Nn][Aa][Ll])
|
|
TC_ENABLED=Internal
|
|
;;
|
|
[Nn][Oo])
|
|
TC_ENABLED=
|
|
;;
|
|
esac
|
|
else
|
|
TC_ENABLED=Yes
|
|
fi
|
|
|
|
if [ -n "$TC_ENABLED" ];then
|
|
[ -n "$MANGLE_ENABLED" ] || fatal_error "Traffic Shaping requires mangle support in your kernel and iptables"
|
|
fi
|
|
|
|
[ "x${SHOREWALL_DIR}" = "x." ] && SHOREWALL_DIR="$PWD"
|
|
[ -n "${RESTOREFILE:=restore}" ]
|
|
|
|
case "${DROP_DEFAULT:=Drop}" in
|
|
None)
|
|
DROP_DEFAULT=none
|
|
;;
|
|
esac
|
|
|
|
case "${REJECT_DEFAULT:=Reject}" in
|
|
None)
|
|
REJECT_DEFAULT=none
|
|
;;
|
|
esac
|
|
|
|
case "${QUEUE_DEFAULT:=none}" in
|
|
None)
|
|
QUEUE_DEFAULT=none
|
|
;;
|
|
esac
|
|
|
|
case "${ACCEPT_DEFAULT:=none}" in
|
|
None)
|
|
ACCEPT_DEFAULT=none
|
|
;;
|
|
esac
|
|
|
|
case "${OPTIMIZE:=0}" in
|
|
0|1)
|
|
;;
|
|
*)
|
|
fatal_error "Invalid OPTIMIZE value ($OPTIMIZE)"
|
|
;;
|
|
esac
|
|
#
|
|
# Strip the files that we use often
|
|
#
|
|
strip_file interfaces
|
|
strip_file hosts
|
|
#
|
|
# Check out the user's shell
|
|
#
|
|
[ -n "${SHOREWALL_SHELL:=/bin/sh}" ]
|
|
|
|
temp=$(decodeaddr 192.168.1.1)
|
|
if [ $(encodeaddr $temp) != 192.168.1.1 ]; then
|
|
fatal_error "Shell $SHOREWALL_SHELL is broken and may not be used with Shorewall"
|
|
fi
|
|
|
|
if [ -z "$KLUDGEFREE" ]; then
|
|
rm -f $TMP_DIR/physdev
|
|
rm -f $TMP_DIR/iprange
|
|
fi
|
|
|
|
qt mywhich awk && HAVEAWK=Yes || HAVEAWK=
|
|
}
|