mirror of
https://gitlab.com/shorewall/code.git
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04f13cf86b
git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@5602 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb
727 lines
19 KiB
Prolog
Executable File
727 lines
19 KiB
Prolog
Executable File
#! /usr/bin/perl -w
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#
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# The Shoreline Firewall (Shorewall) Packet Filtering Firewall Compiler - V3.9
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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) 2007 - 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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# Commands are:
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#
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# compiler.pl Verify the configuration files.
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# compile <path name> Compile into <path name>
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#
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# Environmental Variables are set up by the Compiler wrapper ('compiler' program).
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#
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# EXPORT=Yes -e option specified to /sbin/shorewall
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# SHOREWALL_DIR A directory name was passed to /sbin/shorewall
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# VERBOSE Standard Shorewall verbosity control.
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# DEBUG=Yes Debugging Enabled
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# VERSION Shorewall Version
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# TMP_DIR Temporary Directory containing stripped copies
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# of all configuration files. Shell variable substitution
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# has been performed on these files.
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# TIMESTAMP=Yes -t option specified to /sbin/shorewall
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#
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# This program performs rudimentary shell variable expansion on action and macro files.
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use strict;
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use lib '/usr/share/shorewall';
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use Shorewall::Common;
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use Shorewall::Config;
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use Shorewall::Chains;
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use Shorewall::Zones;
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use Shorewall::Interfaces;
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use Shorewall::Hosts;
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use Shorewall::Nat;
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use Shorewall::Providers;
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use Shorewall::Tc;
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use Shorewall::Tunnels;
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use Shorewall::Policy;
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use Shorewall::Macros;
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use Shorewall::Actions;
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use Shorewall::Accounting;
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use Shorewall::Rules;
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use Shorewall::Proc;
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use Shorewall::Proxyarp;
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sub generate_script_1 {
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copy find_file 'prog.header';
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my $date = localtime;
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emit "#\n# Compiled firewall script generated by Shorewall $ENV{VERSION} - $date\n#";
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if ( $ENV{EXPORT} ) {
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emit 'SHAREDIR=/usr/share/shorewall-lite';
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emit 'CONFDIR=/etc/shorewall-lite';
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emit 'VARDIR=/var/lib/shorewall-lite';
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emit 'PRODUCT="Shorewall Lite"';
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copy "$env{SHAREDIR}/lib.base";
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emit '################################################################################';
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emit '# End of /usr/share/shorewall/lib.base';
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emit '################################################################################';
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} else {
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emit 'SHAREDIR=/usr/share/shorewall';
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emit 'CONFDIR=/etc/shorewall';
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emit 'VARDIR=/var/lib/shorewall';
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emit 'PRODUCT=\'Shorewall\'';
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emit '. /usr/share/shorewall/lib.base';
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}
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emit '';
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for my $exit qw/init start tcclear started stop stopped/ {
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emit "run_${exit}_exit() {";
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push_indent;
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append_file $exit;
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emit 'true';
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pop_indent;
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emit "}\n";
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}
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emit 'initialize()';
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emit '{';
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push_indent;
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if ( $ENV{EXPORT} ) {
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emit '#';
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emit '# These variables are required by the library functions called in this script';
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emit '#';
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emit 'CONFIG_PATH="/etc/shorewall-lite:/usr/share/shorewall-lite"';
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} else {
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emit 'if [ ! -f ${SHAREDIR}/version ]; then';
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emit ' fatal_error "This script requires Shorewall which do not appear to be installed on this system (did you forget \"-e\" when you compiled?)"';
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emit 'fi';
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emit '';
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emit 'local version=$(cat ${SHAREDIR}/version)';
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emit '';
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emit 'if [ ${SHOREWALL_LIBVERSION:-0} -lt 30203 ]; then';
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emit ' fatal_error "This script requires Shorewall version 3.3.3 or later; current version is $version"';
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emit 'fi';
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emit '#';
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emit '# These variables are required by the library functions called in this script';
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emit '#';
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emit "CONFIG_PATH=\"$config{CONFIG_PATH}\"";
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}
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propagateconfig;
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emit '[ -n "${COMMAND:=restart}" ]';
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emit '[ -n "${VERBOSE:=0}" ]';
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emit '[ -n "${RESTOREFILE:=$RESTOREFILE}" ]';
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emit '[ -n "$LOGFORMAT" ] || LOGFORMAT="Shorewall:%s:%s:"';
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emit "VERSION=\"$ENV{VERSION}\"";
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emit "PATH=\"$config{PATH}\"";
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emit 'TERMINATOR=fatal_error';
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if ( $config{IPTABLES} ) {
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emit "IPTABLES=\"$config{IPTABLES}\"\n";
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emit "[ -x \"$config{IPTABLES}\" ] || startup_error \"IPTABLES=$config{IPTABLES} does not exist or is not executable\"";
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} else {
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emit '[ -z "$IPTABLES" ] && IPTABLES=$(mywhich iptables 2> /dev/null)';
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emit '';
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emit '[ -n "$IPTABLES" -a -x "$IPTABLES" ] || startup_error "Can\'t find iptables executable"';
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}
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emit '';
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emit "STOPPING=";
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emit "COMMENT=\n"; # Fixme -- eventually this goes but it's ok now to maintain compability with lib.base
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emit '#';
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emit '# The library requires that ${VARDIR} exist';
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emit '#';
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emit '[ -d ${VARDIR} ] || mkdir -p ${VARDIR}';
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pop_indent;
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emit "}\n";
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}
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sub compile_stop_firewall() {
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#
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# Emacs doesn't handle 'here documents' in Perl Mode nearly as well as it does in Shell mode
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# (it basically doesn't understand it at all and gets lost). So we use the following rather
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# awkward style in place of 'here docs'.
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#
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emit "
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#
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# Stop/restore the firewall after an error or because of a 'stop' or 'clear' command
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#
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stop_firewall() {
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deletechain() {
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qt \$IPTABLES -L \$1 -n && qt \$IPTABLES -F \$1 && qt \$IPTABLES -X \$1
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}
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deleteallchains() {
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\$IPTABLES -F
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\$IPTABLES -X
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}
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setcontinue() {
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\$IPTABLES -A \$1 -m state --state ESTABLISHED,RELATED -j ACCEPT
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}
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delete_nat() {
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\$IPTABLES -t nat -F
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\$IPTABLES -t nat -X
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if [ -f \${VARDIR}/nat ]; then
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while read external interface; do
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del_ip_addr \$external \$interface
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done < \${VARDIR}/nat
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rm -f \${VARDIR}/nat
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fi
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}
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case \$COMMAND in
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stop|clear)
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;;
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*)
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set +x
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case \$COMMAND in
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start)
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logger -p kern.err \"ERROR:\$PRODUCT start failed\"
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;;
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restart)
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logger -p kern.err \"ERROR:\$PRODUCT restart failed\"
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;;
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restore)
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logger -p kern.err \"ERROR:\$PRODUCT restore failed\"
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;;
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esac
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if [ \"\$RESTOREFILE\" = NONE ]; then
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COMMAND=clear
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clear_firewall
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echo \"\$PRODUCT Cleared\"
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kill \$\$
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exit 2
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else
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RESTOREPATH=\${VARDIR}/\$RESTOREFILE
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if [ -x \$RESTOREPATH ]; then
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if [ -x \${RESTOREPATH}-ipsets ]; then
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progress_message2 Restoring Ipsets...
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#
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# We must purge iptables to be sure that there are no
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# references to ipsets
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#
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for table in mangle nat filter; do
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\$IPTABLES -t \$table -F
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\$IPTABLES -t \$table -X
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done
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\${RESTOREPATH}-ipsets
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fi
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echo Restoring \${PRODUCT:=Shorewall}...
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if \$RESTOREPATH restore; then
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echo \"\$PRODUCT restored from \$RESTOREPATH\"
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set_state \"Started\"
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else
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set_state \"Unknown\"
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fi
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kill \$\$
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exit 2
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fi
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fi
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;;
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esac
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set_state \"Stopping\"
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STOPPING=\"Yes\"
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TERMINATOR=
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deletechain shorewall
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determine_capabilities
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run_stop_exit;
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if [ -n \"\$MANGLE_ENABLED\" ]; then
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run_iptables -t mangle -F
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run_iptables -t mangle -X
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for chain in PREROUTING INPUT FORWARD POSTROUTING; do
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qt \$IPTABLES -t mangle -P \$chain ACCEPT
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done
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fi
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if [ -n \"\$RAW_TABLE\" ]; then
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run_iptables -t raw -F
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run_iptables -t raw -X
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for chain in PREROUTING OUTPUT; do
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qt \$IPTABLES -t raw -P \$chain ACCEPT
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done
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fi
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if [ -n \"\$NAT_ENABLED\" ]; then
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delete_nat
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for chain in PREROUTING POSTROUTING OUTPUT; do
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qt \$IPTABLES -t nat -P \$chain ACCEPT
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done
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fi
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if [ -f \${VARDIR}/proxyarp ]; then
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while read address interface external haveroute; do
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qt arp -i \$external -d \$address pub
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[ -z \"\${haveroute}\${NOROUTES}\" ] && qt ip route del \$address dev \$interface
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done < \${VARDIR}/proxyarp
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for f in /proc/sys/net/ipv4/conf/*; do
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[ -f \$f/proxy_arp ] && echo 0 > \$f/proxy_arp
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done
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fi
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rm -f \${VARDIR}/proxyarp\n";
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emit ' delete_tc1' if $config{CLEAR_TC};
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emit ' undo_routing';
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emit ' restore_default_route';
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my $criticalhosts = process_criticalhosts;
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if ( @$criticalhosts ) {
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if ( $config{ADMINISABSENTMINDED} ) {
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emit ' for chain in INPUT OUTPUT; do';
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emit ' setpolicy $chain ACCEPT';
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emit " done\n";
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emit " setpolicy FORWARD DROP\n";
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emit ' deleteallchains';
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emit '';
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for my $hosts ( @$criticalhosts ) {
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my ( $interface, $host ) = ( split /:/, $hosts );
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my $source = match_source_net $host;
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my $dest = match_dest_net $host;
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emit " \$IPTABLES -A INPUT -i $interface $source -j ACCEPT";
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emit " \$IPTABLES -A OUTPUT -o $interface $dest -j ACCEPT";
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}
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emit "
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for chain in INPUT OUTPUT; do
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setpolicy \$chain DROP
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done
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";
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} else {
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emit "
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for chain in INPUT OUTPUT; do
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setpolicy \$chain ACCEPT
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done
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setpolicy FORWARD DROP
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deleteallchains
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";
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for my $hosts ( @$criticalhosts ) {
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my ( $interface, $host ) = ( split /,/, $hosts );
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my $source = match_source_net $host;
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my $dest = match_dest_net $host;
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emit " \$IPTABLES -A INPUT -i $interface $source -j ACCEPT";
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emit " \$IPTABLES -A OUTPUT -o $interface $dest -j ACCEPT";
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}
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emit "
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setpolicy INPUT DROP
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for chain in INPUT FORWARD; do
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setcontinue \$chain
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done
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";
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}
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} elsif ( ! $config{ADMINISABSENTMINDED} ) {
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emit "
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for chain in INPUT OUTPUT FORWARD; do
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setpolicy \$chain DROP
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done
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deleteallchains";
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} else {
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emit "
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for chain in INPUT FORWARD; do
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setpolicy \$chain DROP
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done
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setpolicy OUTPUT ACCEPT
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deleteallchains
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for chain in INPUT FORWARD; do
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setcontinue \$chain
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done
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";
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}
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push_indent;
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process_routestopped;
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emit '$IPTABLES -A INPUT -i lo -j ACCEPT';
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emit '$IPTABLES -A OUTPUT -o lo -j ACCEPT';
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emit '$IPTABLES -A OUTPUT -o lo -j ACCEPT' unless $config{ADMINISABSENTMINDED};
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my $interfaces = find_interfaces_by_option 'dhcp';
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for my $interface ( @$interfaces ) {
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emit "\$IPTABLES -A INPUT -p udp -i $interface --dport 67:68 -j ACCEPT";
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emit "\$IPTABLES -A OUTPUT -p udp -o $interface --dport 67:68 -j ACCEPT" unless $config{ADMINISABSENTMINDED};
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#
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# This might be a bridge
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#
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emit "\$IPTABLES -A FORWARD -p udp -i $interface -o $interface --dport 67:68 -j ACCEPT";
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}
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emit '';
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if ( $config{IP_FORWARDING} =~ /on/i ) {
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emit 'echo 1 > /proc/sys/net/ipv4/ip_forward';
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emit 'progress_message2 IP Forwarding Enabled';
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} elsif ( $config{IP_FORWARDING} =~ /off/i ) {
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emit 'echo 0 > /proc/sys/net/ipv4/ip_forward';
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emit 'progress_message2 IP Forwarding Disabled!';
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}
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append_file 'stopped';
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pop_indent;
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emit "
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set_state \"Stopped\"
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logger -p kern.info \"\$PRODUCT Stopped\"
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case \$COMMAND in
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stop|clear)
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;;
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*)
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#
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# The firewall is being stopped when we were trying to do something
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# else. Remove the lock file and Kill the shell in case we're in a
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# subshell
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#
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kill \$\$
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;;
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esac
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}\n";
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}
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sub generate_script_2 () {
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copy find_file 'prog.functions';
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emit '#';
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emit '# Setup Routing and Traffic Shaping';
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emit '#';
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emit 'setup_routing_and_traffic_shaping() {';
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push_indent;
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emit 'local restore_file=$1';
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save_progress_message 'Initializing...';
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if ( $ENV{EXPORT} ) {
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my $mf = find_file 'modules';
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if ( $mf ne "$env{SHAREDIR}/module" && -f $mf ) {
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emit 'echo MODULESDIR="$MODULESDIR" > ${VARDIR}/.modulesdir';
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emit 'cat > ${VARDIR}/.modules << EOF';
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open MF, $mf or fatal_error "Unable to open $mf: $!";
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while ( $line = <MF> ) { emit_as_is $line if $line =~ /^\s*loadmodule\b/; }
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close MF;
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emit_unindented "EOF\n";
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emit 'reload_kernel_modules < ${VARDIR}/.modules';
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} else {
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emit 'load_kernel_modules Yes';
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}
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} else {
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emit 'load_kernel_modules Yes';
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}
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emit '';
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for my $interface ( @{find_interfaces_by_option 'norfc1918'} ) {
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emit "addr=\$(ip -f inet addr show $interface 2> /dev/null | grep 'inet\ ' | head -n1)";
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emit 'if [ -n "$addr" ]; then';
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emit q( addr=$(echo $addr | sed 's/inet //;s/\/.*//;s/ peer.*//'));
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emit ' for network in 10.0.0.0/8 176.16.0.0/12 192.168.0.0/16; do';
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emit ' if in_network $addr $network; then';
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emit " startup_error \"The 'norfc1918' option has been specified on an interface with an RFC 1918 address. Interface:$interface\"";
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emit ' fi';
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emit ' done';
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emit "fi\n";
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}
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emit "run_init_exit\n";
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emit 'qt $IPTABLES -L shorewall -n && qt $IPTABLES -F shorewall && qt $IPTABLES -X shorewall';
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emit '';
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emit "delete_proxyarp\n";
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emit "delete_tc1\n" if $config{CLEAR_TC};
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emit "disable_ipv6\n" if $config{DISABLE_IPV6};
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setup_mss( $config{CLAMPMSS} ) if $config{CLAMPMSS};
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}
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sub generate_script_3() {
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emit 'cat > ${VARDIR}/proxyarp << __EOF__';
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for $line ( @proxyarp ) {
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emit_unindented $line;
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}
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emit_unindented '__EOF__';
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pop_indent;
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emit "}\n";
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progress_message2 "Creating iptables-restore input...";
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create_netfilter_load;
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emit "#\n# Start/Restart the Firewall\n#";
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emit 'define_firewall() {';
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emit ' setup_routing_and_traffic_shaping;';
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emit ' setup_netfilter';
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emit ' restore_dynamic_rules';
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emit ' date > ${VARDIR}/restarted';
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emit ' run_start_exit';
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emit ' run_iptables -N shorewall';
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emit ' set_state "Started"';
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emit ' run_started_exit';
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emit '';
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emit ' cp -f $(my_pathname) ${VARDIR}/.restore
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case \$COMMAND in
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start)
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logger -p kern.info "$PRODUCT started"
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;;
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restart)
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logger -p kern.info "$PRODUCT restarted"
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;;
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restore)
|
|
logger -p kern.info "$PRODUCT restored"
|
|
;;
|
|
esac';
|
|
|
|
emit "}\n";
|
|
|
|
copy find_file 'prog.footer';
|
|
}
|
|
|
|
sub compile_firewall( $ ) {
|
|
|
|
my $objectfile = $_[0];
|
|
|
|
( $command, $doing, $done ) = qw/ check Checking Checked / unless $objectfile;
|
|
|
|
initialize_chain_table;
|
|
|
|
if ( $command eq 'compile' ) {
|
|
create_temp_object( $objectfile );
|
|
generate_script_1;
|
|
}
|
|
|
|
report_capabilities if $ENV{VERBOSE} > 1;
|
|
|
|
fatal_error "Shorewall $ENV{VERSION} requires Conntrack Match Support"
|
|
unless $capabilities{CONNTRACK_MATCH};
|
|
fatal_error "Shorewall $ENV{VERSION} requires Extended Multi-port Match Support"
|
|
unless $capabilities{XMULTIPORT};
|
|
fatal_error "Shorewall $ENV{VERSION} requires Address Type Match Support"
|
|
unless $capabilities{ADDRTYPE};
|
|
fatal_error 'BRIDGING=Yes requires Physdev Match support in your Kernel and iptables'
|
|
if $config{BRIDGING} && ! $capabilities{PHYSDEV_MATCH};
|
|
fatal_error 'MACLIST_TTL requires the Recent Match capability which is not present in your Kernel and/or iptables'
|
|
if $config{MACLIST_TTL} && ! $capabilities{RECENT_MATCH};
|
|
fatal_error 'RFC1918_STRICT=Yes requires Connection Tracking match'
|
|
if $config{RFC1918_STRICT} && ! $capabilities{CONNTRACK_MATCH};
|
|
#
|
|
# Process the zones file.
|
|
#
|
|
progress_message2 "Determining Zones...";
|
|
determine_zones;
|
|
#
|
|
# Process the interfaces file.
|
|
#
|
|
progress_message2 "Validating interfaces file...";
|
|
validate_interfaces_file;
|
|
dump_interface_info if $ENV{DEBUG};
|
|
#
|
|
# Process the hosts file.
|
|
#
|
|
progress_message2 "Validating hosts file...";
|
|
validate_hosts_file;
|
|
|
|
if ( $ENV{DEBUG} ) {
|
|
dump_zone_info;
|
|
} elsif ( $ENV{VERBOSE} > 1 ) {
|
|
progress_message "Determining Hosts in Zones...";
|
|
zone_report;
|
|
}
|
|
#
|
|
# Do action pre-processing.
|
|
#
|
|
progress_message2 "Preprocessing Action Files...";
|
|
process_actions1;
|
|
#
|
|
# Process the Policy File.
|
|
#
|
|
progress_message2 "Validating Policy file...";
|
|
validate_policy;
|
|
#
|
|
# Compile the 'stop_firewall()' function
|
|
#
|
|
compile_stop_firewall;
|
|
#
|
|
# Start Second Part of script
|
|
#
|
|
generate_script_2;
|
|
#
|
|
# Do all of the zone-independent stuff
|
|
#
|
|
progress_message2 "Setting up Common Rules...";
|
|
add_common_rules;
|
|
#
|
|
# /proc stuff
|
|
#
|
|
setup_arp_filtering;
|
|
setup_route_filtering;
|
|
setup_martian_logging;
|
|
setup_source_routing;
|
|
setup_forwarding;
|
|
#
|
|
# Proxy Arp
|
|
#
|
|
setup_proxy_arp;
|
|
#
|
|
# [Re-]establish Routing
|
|
#
|
|
if ( -s "$ENV{TMP_DIR}/providers" ) {
|
|
setup_providers;
|
|
} else {
|
|
emit "\nundo_routing";
|
|
emit 'restore_default_route';
|
|
}
|
|
#
|
|
# TCRules and Traffic Shaping
|
|
#
|
|
progress_message2 "Processing TC Rules...";
|
|
setup_tc;
|
|
#
|
|
# Setup Masquerading/SNAT
|
|
#
|
|
progress_message2 "$doing Masq file...";
|
|
setup_masq;
|
|
#
|
|
# MACLIST Filtration
|
|
#
|
|
progress_message2 "Setting up MAC Filtration -- Phase 1...";
|
|
setup_mac_lists 1;
|
|
#
|
|
# Process the rules file.
|
|
#
|
|
progress_message2 "$doing Rules...";
|
|
process_rules;
|
|
#
|
|
# Add Tunnel rules.
|
|
#
|
|
progress_message2 "Adding Tunnels...";
|
|
setup_tunnels;
|
|
#
|
|
# Post-rules action processing.
|
|
#
|
|
process_actions2;
|
|
process_actions3;
|
|
#
|
|
# MACLIST Filtration again
|
|
#
|
|
progress_message2 "Setting up MAC Filtration -- Phase 2...";
|
|
setup_mac_lists 2;
|
|
#
|
|
# Apply Policies
|
|
#
|
|
progress_message2 'Applying Policies...';
|
|
apply_policy_rules;
|
|
dump_action_table if $ENV{DEBUG};
|
|
#
|
|
# Setup Nat
|
|
#
|
|
progress_message2 "$doing one-to-one NAT...";
|
|
setup_nat;
|
|
# Accounting.
|
|
#
|
|
progress_message2 "Setting UP Accounting...";
|
|
setup_accounting;
|
|
|
|
if ( $command eq 'check' ) {
|
|
progress_message3 "Shorewall configuration verified";
|
|
} else {
|
|
#
|
|
# Finish the script.
|
|
#
|
|
progress_message2 'Generating Rule Matrix...';
|
|
generate_matrix;
|
|
dump_chain_table if $ENV{DEBUG};
|
|
generate_script_3;
|
|
finalize_object;
|
|
generate_aux_config;
|
|
|
|
}
|
|
}
|
|
|
|
#
|
|
# E x e c u t i o n S t a r t s H e r e
|
|
#
|
|
|
|
$ENV{VERBOSE} = 2 if $ENV{DEBUG};
|
|
#
|
|
# Get shorewall.conf and capabilities.
|
|
#
|
|
get_configuration;
|
|
#
|
|
# Compile/Check the configuration.
|
|
#
|
|
compile_firewall $ARGV[0];
|