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af0320f28b
git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@4555 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb
255 lines
7.0 KiB
Bash
255 lines
7.0 KiB
Bash
#!/bin/sh
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#
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# Shorewall 3.2 -- /usr/share/shorewall/lib.tcrules
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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 is loaded by /usr/share/shorewall/compiler when the maclist option
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# is specified in an entry in the interfaces file.
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#
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#
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# Set up MAC Verification
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#
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setup_mac_lists() {
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local interface
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local mac
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local addresses
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local address
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local chain
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local chain1
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local macpart
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local blob
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local hosts
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local ipsec
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local policy=
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create_mac_chain()
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{
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case $MACLIST_TABLE in
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filter)
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createchain $1 no
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;;
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*)
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createmanglechain $1
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;;
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esac
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}
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have_mac_chain()
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{
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local result
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case $MACLIST_TABLE in
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filter)
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havechain $1 && result=0 || result=1
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;;
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*)
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havemanglechain $1 && result=0 || result=1
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;;
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esac
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return $result
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}
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#
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# Generate the list of interfaces having MAC verification
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#
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maclist_interfaces=
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for hosts in $maclist_hosts; do
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hosts=${hosts#*^}
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interface=${hosts%%:*}
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if ! list_search $interface $maclist_interfaces; then\
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if [ -z "$maclist_interfaces" ]; then
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maclist_interfaces=$interface
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else
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maclist_interfaces="$maclist_interfaces $interface"
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fi
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fi
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done
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progress_message "$DOING MAC Verification on $maclist_interfaces..."
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#
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# Create chains.
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#
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for interface in $maclist_interfaces; do
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chain=$(mac_chain $interface)
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create_mac_chain $chain
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#
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# If we're using the mangle table and the interface is DHCP-enabled then we need to accept DHCP broadcasts from 0.0.0.0
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#
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if [ $MACLIST_TABLE = mangle ] && interface_has_option $interface dhcp; then
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run_iptables -t mangle -A $chain -s 0.0.0.0 -d 255.255.255.255 -p udp --dport 67:68 -j RETURN
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fi
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if [ -n "$MACLIST_TTL" ]; then
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chain1=$(macrecent_target $interface)
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create_mac_chain $chain1
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run_iptables -A $chain -t $MACLIST_TABLE -m recent --rcheck --seconds $MACLIST_TTL --name $chain -j RETURN
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run_iptables -A $chain -t $MACLIST_TABLE -j $chain1
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run_iptables -A $chain -t $MACLIST_TABLE -m recent --update --name $chain -j RETURN
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run_iptables -A $chain -t $MACLIST_TABLE -m recent --set --name $chain
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fi
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done
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#
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# Process the maclist file producing the verification rules
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#
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while read disposition interface mac addresses; do
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expandv disposition interface mac addresses
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level=
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case $disposition in
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ACCEPT:*)
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level=${disposition#*:}
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disposition=ACCEPT
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target=RETURN
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;;
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ACCEPT)
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target=RETURN
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;;
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REJECT:*)
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[ $MACLIST_TABLE = mangle ] && fatal_error "DISPOSITION = REJECT is incompatible with MACLIST_TABLE=mangle"
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target=reject
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disposition=REJECT
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;;
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REJECT)
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[ $MACLIST_TABLE = mangle ] && fatal_error "DISPOSITION = REJECT is incompatible with MACLIST_TABLE=mangle"
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target=reject
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;;
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DROP:*)
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level=${disposition#*:}
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disposition=DROP
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target=DROP
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;;
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DROP)
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target=DROP
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;;
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*)
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addresses="$mac"
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mac="$interface"
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interface="$disposition"
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disposition=ACCEPT
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target=RETURN
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;;
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esac
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physdev_part=
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if [ -n "$BRIDGING" ]; then
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case $interface in
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*:*)
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physdev_part="-m physdev --physdev-in ${interface#*:}"
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interface=${interface%:*}
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;;
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esac
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fi
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[ -n "$MACLIST_TTL" ] && chain=$(macrecent_target $interface) || chain=$(mac_chain $interface)
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if ! have_mac_chain $chain ; then
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fatal_error "No hosts on $interface have the maclist option specified"
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fi
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if [ x${mac:=-} = x- ]; then
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if [ -z "$addresses" ]; then
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fatal_error "You must specify a MAC address or an IP address"
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else
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macpart=
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fi
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else
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macpart=$(mac_match $mac)
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fi
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if [ -z "$addresses" ]; then
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[ -n "$level" ] && \
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log_rule_limit $level $chain $(mac_chain $interface) $disposition "$LOGLIMIT" "" -A -t $MACLIST_TABLE $macpart $physdev_part
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run_iptables -A $chain -t $MACLIST_TABLE $macpart $physdev_part -j $target
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else
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for address in $(separate_list $addresses) ; do
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[ -n "$level" ] && \
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log_rule_limit $level $chain $(mac_chain $interface) $disposition "$LOGLIMIT" "" -A -t $MACLIST_TABLE $macpart -s $address $physdev_part
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run_iptables2 -A $chain -t $MACLIST_TABLE $macpart -s $address $physdev_part -j $target
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done
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fi
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done < $TMP_DIR/maclist
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#
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# Must take care of our own broadcasts and multicasts then terminate the verification
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# chains
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#
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for interface in $maclist_interfaces; do
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[ -n "$MACLIST_TTL" ] && chain=$(macrecent_target $interface) || chain=$(mac_chain $interface)
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if [ -n "$MACLIST_LOG_LEVEL" -o $MACLIST_DISPOSITION != ACCEPT ]; then
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indent >&3 << __EOF__
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blob=\$(ip link show $interface 2> /dev/null)
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[ -z "\$blob" ] && \
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fatal_error "Interface $interface must be up before Shorewall can start"
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ip -f inet addr show $interface 2> /dev/null | grep 'inet.*brd' | sed 's/inet //; s/brd //; s/scope.*//;' | while read address broadcast; do
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address=\${address%/*}
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if [ -n "\$broadcast" ]; then
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run_iptables -t $MACLIST_TABLE -A $chain -s \$address -d \$broadcast -j RETURN
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fi
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run_iptables -t $MACLIST_TABLE -A $chain -s \$address -d 255.255.255.255 -j RETURN
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run_iptables -t $MACLIST_TABLE -A $chain -s \$address -d 224.0.0.0/4 -j RETURN
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done
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__EOF__
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fi
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if [ -n "$MACLIST_LOG_LEVEL" ]; then
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log_rule_limit $MACLIST_LOG_LEVEL $chain $(mac_chain $interface) $MACLIST_DISPOSITION "$LOGLIMIT" "" -A -t $MACLIST_TABLE
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fi
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if [ $MACLIST_DISPOSITION != ACCEPT ]; then
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run_iptables -A $chain -t $MACLIST_TABLE -j $maclist_target
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fi
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done
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#
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# Generate jumps from the input and forward chains
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#
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for hosts in $maclist_hosts; do
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ipsec=${hosts%^*}
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hosts=${hosts#*^}
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[ -n "$POLICY_MATCH" ] && policy="-m policy --pol $ipsec --dir in" || policy=
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interface=${hosts%%:*}
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hosts=${hosts#*:}
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case $MACLIST_TABLE in
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filter)
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for chain in $(first_chains $interface) ; do
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run_iptables -A $chain $(match_source_hosts $hosts) -m state --state NEW \
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$policy -j $(mac_chain $interface)
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done
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;;
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*)
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run_iptables -t mangle -A PREROUTING -i $interface $(match_source_hosts $hosts) -m state --state NEW \
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$policy -j $(mac_chain $interface)
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;;
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esac
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done
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}
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