forked from extern/shorewall_code
46364902e3
git-svn-id: https://shorewall.svn.sourceforge.net/svnroot/shorewall/trunk@5817 fbd18981-670d-0410-9b5c-8dc0c1a9a2bb
132 lines
3.5 KiB
Bash
132 lines
3.5 KiB
Bash
#!/bin/sh
|
|
#
|
|
# Shorewall 3.4 -- /usr/share/shorewall/lib.proxyarp
|
|
#
|
|
# This program is under GPL [http://www.gnu.org/copyleft/gpl.htm]
|
|
#
|
|
# (c) 1999,2000,2001,2002,2003,2004,2005,2006,2007 - Tom Eastep (teastep@shorewall.net)
|
|
#
|
|
# Complete documentation is available at http://shorewall.net
|
|
#
|
|
# This program is free software; you can redistribute it and/or modify
|
|
# it under the terms of Version 2 of the GNU General Public License
|
|
# as published by the Free Software Foundation.
|
|
#
|
|
# This program is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# GNU General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License
|
|
# along with this program; if not, write to the Free Software
|
|
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA
|
|
#
|
|
# This library is loaded by /usr/share/shorewall/compiler when the 'proxyarp' option is
|
|
# specified in the interfaces file or when the proxyarp file is non-empty.
|
|
#
|
|
|
|
#
|
|
# Setup Proxy ARP
|
|
#
|
|
setup_proxy_arp() {
|
|
|
|
local setlist= resetlist=
|
|
|
|
print_error() {
|
|
error_message "Invalid value for HAVEROUTE - ($haveroute)"
|
|
error_message "Entry \"$address $interface $external $haveroute\" ignored"
|
|
}
|
|
|
|
print_error1() {
|
|
error_message "Invalid value for PERSISTENT - ($persistent)"
|
|
error_message "Entry \"$address $interface $external $haveroute $persistent\" ignored"
|
|
}
|
|
|
|
print_warning() {
|
|
error_message "PERSISTENT setting ignored - ($persistent)"
|
|
error_message "Entry \"$address $interface $external $haveroute $persistent\""
|
|
}
|
|
|
|
setup_one_proxy_arp() {
|
|
|
|
case $haveroute in
|
|
[Nn][Oo])
|
|
haveroute=
|
|
;;
|
|
[Yy][Ee][Ss])
|
|
;;
|
|
*)
|
|
if [ -n "$haveroute" ]; then
|
|
print_error
|
|
return
|
|
fi
|
|
;;
|
|
esac
|
|
|
|
case $persistent in
|
|
[Nn][Oo])
|
|
persistent=
|
|
;;
|
|
[Yy][Ee][Ss])
|
|
[ -z "$haveroute" ] || print_warning
|
|
;;
|
|
*)
|
|
if [ -n "$persistent" ]; then
|
|
print_error1
|
|
return
|
|
fi
|
|
;;
|
|
esac
|
|
|
|
if [ -z "$haveroute" ]; then
|
|
save_command "[ -n \"\$NOROUTES\" ] || run_ip route replace $address dev $interface"
|
|
[ -n "$persistent" ] && haveroute=yes
|
|
fi
|
|
|
|
indent >&3 << __EOF__
|
|
if ! arp -i $external -Ds $address $external pub; then
|
|
fatal_error "Command \"arp -i $external -Ds $address $external pub\" failed"
|
|
fi
|
|
|
|
progress_message " Host $address connected to $interface added to ARP on $external"
|
|
|
|
__EOF__
|
|
echo $address $interface $external $haveroute >> $STATEDIR/proxyarp
|
|
|
|
progress_message " Host $address connected to $interface added to ARP on $external"
|
|
}
|
|
|
|
> $STATEDIR/proxyarp
|
|
|
|
save_progress_message "Setting up Proxy ARP..."
|
|
|
|
while read address interface external haveroute persistent; do
|
|
list_search $interface $setlist || setlist="$setlist $interface"
|
|
list_search $external $resetlist || list_search $external $setlist || resetlist="$resetlist $external"
|
|
setup_one_proxy_arp
|
|
done < $TMP_DIR/proxyarp
|
|
|
|
for interface in $resetlist; do
|
|
list_search $interface $setlist || \
|
|
save_command "echo 0 > /proc/sys/net/ipv4/conf/$interface/proxy_arp"
|
|
done
|
|
|
|
for interface in $setlist; do
|
|
save_command "echo 1 > /proc/sys/net/ipv4/conf/$interface/proxy_arp"
|
|
done
|
|
|
|
interfaces=$(find_interfaces_by_option proxyarp)
|
|
|
|
for interface in $interfaces; do
|
|
indent >&3 << __EOF__
|
|
if [ -f /proc/sys/net/ipv4/conf/$interface/proxy_arp ] ; then
|
|
echo 1 > /proc/sys/net/ipv4/conf/$interface/proxy_arp
|
|
else
|
|
error_message "WARNING: Unable to enable proxy ARP on $interface"
|
|
fi
|
|
|
|
__EOF__
|
|
done
|
|
|
|
}
|