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https://gitlab.com/shorewall/code.git
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4d750aa835
git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@3760 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb
323 lines
8.9 KiB
Bash
Executable File
323 lines
8.9 KiB
Bash
Executable File
#!/bin/sh
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#
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# Shorewall Packet Filtering Firewall Capabilities Detector
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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) 2006 - Tom Eastep (teastep@shorewall.net)
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#
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# This file should be placed in /sbin/shorewall.
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#
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# Shorewall documentation is available at http://shorewall.sourceforge.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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#
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# This program may be used to create a /etc/shorewall/capabilities file for
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# use in compiling Shorewall firewalls on another system.
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#
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# On the target system (the system where the firewall program is to run):
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#
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# [ IPTABLES=<iptables binary> ] [ MODULESDIR=<kernel modules directory> ] shorecap > capabilities
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#
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# Now move the capabilities file to the compilation system. The file must
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# be placed in a directory on the CONFIG_PATH to be used when compiling firewalls
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# for the target system.
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#
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# Default values for the two variables are:
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#
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# IPTABLES - iptables
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# MODULESDIR - /lib/modules/$(uname -r)/kernel/net/ipv4/netfilter
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#
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# Shorewall need not be installed on the target system to run shorecap. If the '-e' flag is
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# used during firewall compilation, then the generated firewall program will likewise not
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# require Shorewall to be installed.
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VERSION=3.2.0-Beta3
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#
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# Suppress all output for a command
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#
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qt()
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{
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"$@" >/dev/null 2>&1
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}
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#
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# Split a colon-separated list into a space-separated list
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#
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split() {
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local ifs=$IFS
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IFS=:
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set -- $1
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echo $*
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IFS=$ifs
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}
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#
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# Internal version of 'which'
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#
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mywhich() {
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local dir
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for dir in $(split $PATH); do
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if [ -x $dir/$1 ]; then
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echo $dir/$1
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return 0
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fi
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done
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return 2
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}
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#
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# Load a Kernel Module
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#
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loadmodule() # $1 = module name, $2 - * arguments
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{
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local modulename=$1
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local modulefile
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local suffix
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moduleloader=modprobe
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if ! qt mywhich modprobe; then
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moduleloader=insmod
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fi
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if [ -z "$(lsmod | grep $modulename)" ]; then
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shift
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for suffix in $MODULE_SUFFIX ; do
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modulefile=$MODULESDIR/${modulename}.${suffix}
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if [ -f $modulefile ]; then
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case $moduleloader in
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insmod)
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insmod $modulefile $*
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;;
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*)
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modprobe $modulename $*
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;;
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esac
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return
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fi
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done
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fi
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}
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#
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# Load kernel modules required for Shorewall
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#
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load_kernel_modules()
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{
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[ -z "$MODULESDIR" ] && \
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MODULESDIR=/lib/modules/$(uname -r)/kernel/net/ipv4/netfilter
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#
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# Essential Modules
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#
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loadmodule ip_tables
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loadmodule iptable_filter
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loadmodule ip_conntrack
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#
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# Helpers
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#
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loadmodule ip_conntrack_ftp
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loadmodule ip_conntrack_tftp
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loadmodule ip_conntrack_irc
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loadmodule iptable_nat
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loadmodule ip_nat_ftp
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loadmodule ip_nat_tftp
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loadmodule ip_nat_irc
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loadmodule ip_set
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loadmodule ip_set_iphash
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loadmodule ip_set_ipmap
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loadmodule ip_set_macipmap
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loadmodule ip_set_portmap
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#
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# Traffic Shaping
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#
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loadmodule sch_sfq
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loadmodule sch_ingress
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loadmodule sch_htb
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loadmodule cls_u32
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#
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# Extensions
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#
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loadmodule ipt_addrtype
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loadmodule ipt_ah
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loadmodule ipt_CLASSIFY
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loadmodule ipt_CLUSTERIP
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loadmodule ipt_comment
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loadmodule ipt_connmark
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loadmodule ipt_CONNMARK
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loadmodule ipt_conntrack
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loadmodule ipt_dscp
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loadmodule ipt_DSCP
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loadmodule ipt_ecn
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loadmodule ipt_ECN
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loadmodule ipt_esp
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loadmodule ipt_hashlimit
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loadmodule ipt_helper
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loadmodule ipt_ipp2p
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loadmodule ipt_iprange
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loadmodule ipt_length
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loadmodule ipt_limit
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loadmodule ipt_LOG
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loadmodule ipt_mac
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loadmodule ipt_mark
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loadmodule ipt_MARK
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loadmodule ipt_MASQUERADE
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loadmodule ipt_multiport
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loadmodule ipt_NETMAP
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loadmodule ipt_NOTRACK
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loadmodule ipt_owner
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loadmodule ipt_physdev
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loadmodule ipt_pkttype
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loadmodule ipt_policy
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loadmodule ipt_realm
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loadmodule ipt_recent
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loadmodule ipt_REDIRECT
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loadmodule ipt_REJECT
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loadmodule ipt_SAME
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loadmodule ipt_sctp
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loadmodule ipt_set
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loadmodule ipt_state
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loadmodule ipt_tcpmss
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loadmodule ipt_TCPMSS
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loadmodule ipt_tos
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loadmodule ipt_TOS
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loadmodule ipt_ttl
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loadmodule ipt_TTL
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loadmodule ipt_ULOG
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}
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#
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# Determine which optional facilities are supported by iptables/netfilter
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#
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determine_capabilities() {
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[ -z "$IPTABLES" ] && IPTABLES=$(mywhich iptables)
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[ -z "$IPTABLES" ] && { echo "ERROR: Can't find IPTABLES executable" ; exit 2; }
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qt $IPTABLES -t nat -L -n && NAT_ENABLED=Yes || NAT_ENABLED=
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qt $IPTABLES -t mangle -L -n && MANGLE_ENABLED=Yes || MANGLE_ENABLED=
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CONNTRACK_MATCH=
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MULTIPORT=
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XMULTIPORT=
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POLICY_MATCH=
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PHYSDEV_MATCH=
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IPRANGE_MATCH=
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RECENT_MATCH=
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OWNER_MATCH=
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IPSET_MATCH=
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CONNMARK=
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CONNMARK_MATCH=
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RAW_TABLE=
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IPP2P_MATCH=
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LENGTH_MATCH=
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CLASSIFY_TARGET=
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ENHANCED_REJECT=
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USEPKTTYPE=
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KLUDGEFREE=
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qt $IPTABLES -N fooX1234
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qt $IPTABLES -A fooX1234 -m conntrack --ctorigdst 192.168.1.1 -j ACCEPT && CONNTRACK_MATCH=Yes
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qt $IPTABLES -A fooX1234 -p tcp -m multiport --dports 21,22 -j ACCEPT && MULTIPORT=Yes
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qt $IPTABLES -A fooX1234 -p tcp -m multiport --dports 21:22 -j ACCEPT && XMULTIPORT=Yes
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qt $IPTABLES -A fooX1234 -m policy --pol ipsec --mode tunnel --dir in -j ACCEPT && POLICY_MATCH=Yes
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if qt $IPTABLES -A fooX1234 -m physdev --physdev-in eth0 -j ACCEPT; then
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PHYSDEV_MATCH=Yes
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qt $IPTABLES -A fooX1234 -m physdev --physdev-in eth1 -m physdev --physdev-out eth1 -j ACCEPT && KLUDGEFREE=Yes
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fi
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if qt $IPTABLES -A fooX1234 -m iprange --src-range 192.168.1.5-192.168.1.124 -j ACCEPT; then
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IPRANGE_MATCH=Yes
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if [ -z "${KLUDGEFREE}${PHYSDEV_MATCH}" ]; then
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qt $IPTABLES -A fooX1234 -m iprange --src-range 192.168.1.5-192.168.1.124 -m iprange --dst-range 192.168.1.5-192.168.1.124 -j ACCEPT && KLUDGEFREE=Yes
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fi
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fi
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qt $IPTABLES -A fooX1234 -m recent --update -j ACCEPT && RECENT_MATCH=Yes
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qt $IPTABLES -A fooX1234 -m owner --uid-owner 0 -j ACCEPT && OWNER_MATCH=Yes
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qt $IPTABLES -A fooX1234 -m connmark --mark 2 -j ACCEPT && CONNMARK_MATCH=Yes
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qt $IPTABLES -A fooX1234 -p tcp -m ipp2p --ipp2p -j ACCEPT && IPP2P_MATCH=Yes
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qt $IPTABLES -A fooX1234 -m length --length 10:20 -j ACCEPT && LENGTH_MATCH=Yes
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qt $IPTABLES -A fooX1234 -j REJECT --reject-with icmp-host-prohibited && ENHANCED_REJECT=Yes
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qt $IPTABLES -t mangle -N fooX1234
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qt $IPTABLES -t mangle -A fooX1234 -j CONNMARK --save-mark && CONNMARK=Yes
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qt $IPTABLES -t mangle -A fooX1234 -j CLASSIFY --set-class 1:1 && CLASSIFY_TARGET=Yes
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qt $IPTABLES -t mangle -F fooX1234
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qt $IPTABLES -t mangle -X fooX1234
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qt $IPTABLES -t raw -L -n && RAW_TABLE=Yes
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if qt mywhich ipset; then
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qt ipset -X fooX1234 # Just in case something went wrong the last time
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if qt ipset -N fooX1234 iphash ; then
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if qt $IPTABLES -A fooX1234 -m set --set fooX1234 src -j ACCEPT; then
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qt $IPTABLES -D fooX1234 -m set --set fooX1234 src -j ACCEPT
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IPSET_MATCH=Yes
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fi
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qt ipset -X fooX1234
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fi
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fi
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qt $IPTABLES -A fooX1234 -m pkttype --pkt-type broadcast -j ACCEPT && USEPKTTYPE=Yes
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qt $IPTABLES -F fooX1234
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qt $IPTABLES -X fooX1234
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}
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report_capability() # $1 = Capability
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{
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eval echo $1=\$$1
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}
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report_capabilities() {
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echo "#"
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echo "# Shorewall $VERSION detected the following iptables/netfilter capabilities - $(date)"
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echo "#"
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report_capability NAT_ENABLED
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report_capability MANGLE_ENABLED
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report_capability MULTIPORT
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[ -n "$MULTIPORT" ] && report_capability XMULTIPORT
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report_capability CONNTRACK_MATCH
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report_capability USEPKTTYPE
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report_capability POLICY_MATCH
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report_capability PHYSDEV_MATCH
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report_capability LENGTH_MATCH
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report_capability IPRANGE_MATCH
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report_capability RECENT_MATCH
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report_capability OWNER_MATCH
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report_capability IPSET_MATCH
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report_capability CONNMARK
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report_capability CONNMARK_MATCH
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report_capability RAW_TABLE
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report_capability IPP2P_MATCH
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report_capability CLASSIFY_TARGET
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report_capability ENHANCED_REJECT
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report_capability KLUDGEFREE
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}
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load_kernel_modules
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determine_capabilities
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report_capabilities
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