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shorewall_code/Shorewall-lite/shorewall-lite
Tom Eastep d33c96e4c6 fix mutex/nolock issues
2010-07-23 13:24:07 -07:00

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#!/bin/sh
#
# Shorewall Lite Packet Filtering Firewall Control Program - V4.1
#
# This program is under GPL [http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt]
#
# (c) 2006,2007,2008,2009,2010 - Tom Eastep (teastep@shorewall.net)
#
# This file should be placed in /sbin/shorewall-lite.
#
# Shorewall 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
# If an error occurs while starting or restarting the firewall, the
# firewall is automatically stopped.
#
# Commands are:
#
# shorewall-lite dump Dumps all Shorewall-related information
# for problem analysis
# shorewall-lite start Starts the firewall
# shorewall-lite restart Restarts the firewall
# shorewall-lite stop Stops the firewall
# shorewall-lite status Displays firewall status
# shorewall-lite reset Resets iptables packet and
# byte counts
# shorewall-lite clear Open the floodgates by
# removing all iptables rules
# and setting the three permanent
# chain policies to ACCEPT
# shorewall-lite show <chain> [ <chain> ... ] Display the rules in each <chain> listed
# shorewall-lite show log Print the last 20 log messages
# shorewall-lite show connections Show the kernel's connection
# tracking table
# shorewall-lite show nat Display the rules in the nat table
# shorewall-lite show {mangle|tos} Display the rules in the mangle table
# shorewall-lite show tc Display traffic control info
# shorewall-lite show classifiers Display classifiers
# shorewall-lite show capabilities Display iptables/kernel capabilities
# shorewall-lite show vardir Display VARDIR setting
# shorewall-lite version Display the installed version id
# shorewall-lite logwatch [ refresh-interval ] Monitor the local log for Shorewall
# messages.
# shorewall-lite drop <address> ... Temporarily drop all packets from the
# listed address(es)
# shorewall-lite reject <address> ... Temporarily reject all packets from the
# listed address(es)
# shorewall-lite allow <address> ... Reenable address(es) previously
# disabled with "drop" or "reject"
# shorewall-lite save [ <file> ] Save the list of "rejected" and
# "dropped" addresses so that it will
# be automatically reinstated the
# next time that Shorewall starts.
# Save the current state so that 'shorewall
# restore' can be used.
#
# shorewall-lite forget [ <file> ] Discard the data saved by 'shorewall save'
#
# shorewall-lite restore [ <file> ] Restore the state of the firewall from
# previously saved information.
#
# shorewall-lite ipaddr { <address>/<cidr> | <address> <netmask> }
#
# Displays information about the network
# defined by the argument[s]
#
# shorewall-lite iprange <address>-<address> Decomposes a range of IP addresses into
# a list of network/host addresses.
#
# shorewall-lite ipdecimal { <address> | <integer> }
#
# Displays the decimal equivalent of an IP
# address and vice versa.
#
# Set the configuration variables from shorewall-lite.conf
#
get_config() {
[ -n "$PATH" ] || PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/bin:/usr/local/sbin
[ -z "$LOGFILE" ] && LOGFILE=/var/log/messages
if ( ps ax 2> /dev/null | grep -v grep | qt grep 'syslogd.*-C' ) ; then
LOGREAD="logread | tac"
elif [ -r $LOGFILE ]; then
LOGREAD="tac $LOGFILE"
else
echo "LOGFILE ($LOGFILE) does not exist!" >&2
exit 2
fi
#
# See if we have a real version of "tail" -- use separate redirection so
# that ash (aka /bin/sh on LRP) doesn't crap
#
if ( tail -n5 /dev/null > /dev/null 2> /dev/null ) ; then
realtail="Yes"
else
realtail=""
fi
[ -n "$FW" ] || FW=fw
[ -n "LOGFORMAT" ] && LOGFORMAT="${LOGFORMAT%%%*}"
[ -n "$LOGFORMAT" ] || LOGFORMAT="Shorewall:"
if [ -n "$IPTABLES" ]; then
if [ ! -x "$IPTABLES" ]; then
echo " ERROR: The program specified in IPTABLES does not exist or is not executable" >&2
exit 2
fi
else
IPTABLES=$(mywhich iptables 2> /dev/null)
if [ -z "$IPTABLES" ] ; then
echo " ERROR: Can't find iptables executable" >&2
exit 2
fi
fi
if [ -n "$SHOREWALL_SHELL" ]; then
if [ ! -x "$SHOREWALL_SHELL" ]; then
echo " WARNING: The program specified in SHOREWALL_SHELL does not exist or is not executable; falling back to /bin/sh" >&2
SHOREWALL_SHELL=/bin/sh
fi
fi
[ -n "$RESTOREFILE" ] || RESTOREFILE=restore
validate_restorefile RESTOREFILE
[ -n "${VERBOSITY:=2}" ]
[ -n "$g_use_verbosity" ] && VERBOSITY=$g_use_verbosity || VERBOSITY=$(($g_verbose_offset + $VERBOSITY))
g_hostname=$(hostname 2> /dev/null)
IP=$(mywhich ip 2> /dev/null)
if [ -z "$IP" ] ; then
echo " ERROR: Can't find ip executable" >&2
exit 2
fi
IPSET=ipset
TC=tc
}
#
# Verify that we have a compiled firewall script
#
verify_firewall_script() {
if [ ! -f $g_firewall ]; then
echo " ERROR: Shorewall Lite is not properly installed" >&2
if [ -L $g_firewall ]; then
echo " $g_firewall is a symbolic link to a" >&2
echo " non-existant file" >&2
else
echo " The file $g_firewall does not exist" >&2
fi
exit 2
fi
}
#
# Start Command Executor
#
start_command() {
local finished
finished=0
do_it() {
local rc
rc=0
[ -n "$nolock" ] || mutex_on
if [ -x ${LITEDIR}/firewall ]; then
run_it ${LITEDIR}/firewall $debugging start
rc=$?
else
error_message "${LITEDIR}/firewall is missing or is not executable"
logger -p kern.err "ERROR:Shorewall Lite start failed"
rc=2
fi
[ -n "$nolock" ] || mutex_off
exit $rc
}
verify_firewall_script
if shorewall_is_started; then
error_message "Shorewall is already running"
exit 0
fi
while [ $finished -eq 0 -a $# -gt 0 ]; do
option=$1
case $option in
-*)
option=${option#-}
while [ -n "$option" ]; do
case $option in
-)
finished=1
option=
;;
f*)
g_fast=Yes
option=${option#f}
;;
p*)
[ -n "$(which conntrack)" ] || fatal_error "The '-p' option requires the conntrack utility which does not appear to be installed on this system"
g_purge=Yes
option=${option%p}
;;
*)
usage 1
;;
esac
done
shift
;;
*)
finished=1
;;
esac
done
case $# in
0)
;;
*)
usage 1
;;
esac
if [ -n "$g_fast" ]; then
if qt mywhich make; then
export RESTOREFILE
make -qf ${CONFDIR}/Makefile || g_fast=
fi
if [ -n "$g_fast" ]; then
g_restorepath=${VARDIR}/$RESTOREFILE
if [ -x $g_restorepath ]; then
echo Restoring Shorewall Lite...
run_it $g_restorepath restore
date > ${VARDIR}/restarted
progress_message3 Shorewall Lite restored from $g_restorepath
else
do_it
fi
else
do_it
fi
else
do_it
fi
}
#
# Restart Command Executor
#
restart_command() {
local finished
finished=0
local rc
rc=0
verify_firewall_script
while [ $finished -eq 0 -a $# -gt 0 ]; do
option=$1
case $option in
-*)
option=${option#-}
while [ -n "$option" ]; do
case $option in
-)
finished=1
option=
;;
n*)
g_noroutes=Yes
option=${option#n}
;;
p*)
[ -n "$(which conntrack)" ] || fatal_error "The '-p' option requires the conntrack utility which does not appear to be installed on this system"
g_purge=Yes
option=${option%p}
;;
*)
usage 1
;;
esac
done
shift
;;
*)
finished=1
;;
esac
done
case $# in
0)
;;
*)
usage 1
;;
esac
[ -n "$nolock" ] || mutex_on
if [ -x ${LITEDIR}/firewall ]; then
run_it ${LITEDIR}/firewall $debugging restart
rc=$?
else
error_message "${LITEDIR}/firewall is missing or is not executable"
logger -p kern.err "ERROR:Shorewall Lite restart failed"
rc=2
fi
[ -n "$nolock" ] || mutex_off
return $rc
}
#
# Give Usage Information
#
usage() # $1 = exit status
{
echo "Usage: $(basename $0) [debug|trace] [nolock] [ -q ] [ -v[-1|{0-2}] ] [ -t ] <command>"
echo "where <command> is one of:"
echo " add <interface>[:<host-list>] ... <zone>"
echo " allow <address> ..."
echo " clear"
echo " delete <interface>[:<host-list>] ... <zone>"
echo " drop <address> ..."
echo " dump [ -x ]"
echo " forget [ <file name> ]"
echo " help"
echo " ipcalc { <address>/<vlsm> | <address> <netmask> }"
echo " ipdecimal { <address> | <integer> }"
echo " iprange <address>-<address>"
echo " logdrop <address> ..."
echo " logreject <address> ..."
echo " logwatch [<refresh interval>]"
echo " reject <address> ..."
echo " reset [ <chain> ... ]"
echo " restart [ -n ] [ -p ] [ -f ] [ <directory> ]"
echo " restore [ -n ] [ <file name> ]"
echo " save [ <file name> ]"
echo " show [ -x ] [ -t {filter|mangle|nat} ] [ {chain [<chain> [ <chain> ... ]"
echo " show [ -f ] capabilities"
echo " show classifiers"
echo " show config"
echo " show connections"
echo " show filters"
echo " show ip"
echo " show [ -m ] log [<regex>]"
echo " show [ -x ] mangle|nat|raw|routing"
echo " show policies"
echo " show tc [ device ]"
echo " show vardir"
echo " show zones"
echo " start [ -f ] [ -p ] [ <directory> ]"
echo " stop"
echo " status"
echo " version [ -a ]"
echo
exit $1
}
version_command() {
local finished
finished=0
local all
all=
local product
while [ $finished -eq 0 -a $# -gt 0 ]; do
option=$1
case $option in
-*)
option=${option#-}
while [ -n "$option" ]; do
case $option in
-)
finished=1
option=
;;
a*)
all=Yes
option=${option#a}
;;
*)
usage 1
;;
esac
done
shift
;;
*)
finished=1
;;
esac
done
[ $# -gt 0 ] && usage 1
echo $SHOREWALL_VERSION
if [ -n "$all" ]; then
for product in shorewall shorewall6 shorewall6-lite shorewall-init; do
if [ -f /usr/share/$product/version ]; then
echo "$product: $(cat /usr/share/$product/version)"
fi
done
fi
}
#
# Execution begins here
#
debugging=
if [ $# -gt 0 ] && [ "$1" = "debug" -o "$1" = "trace" ]; then
debugging=$1
shift
fi
nolock=
if [ $# -gt 0 ] && [ "$1" = "nolock" ]; then
nolock=nolock
shift
fi
g_ipt_options="-nv"
g_fast=
g_verbose_offset=0
g_use_verbosity=
g_noroutes=
g_timestamp=
g_recovering=
finished=0
while [ $finished -eq 0 ]; do
[ $# -eq 0 ] && usage 1
option=$1
case $option in
-)
finished=1
;;
-*)
option=${option#-}
[ -z "$option" ] && usage 1
while [ -n "$option" ]; do
case $option in
x*)
g_ipt_options="-xnv"
option=${option#x}
;;
q*)
g_verbose_offset=$(($g_verbose_offset - 1 ))
option=${option#q}
;;
f*)
g_fast=Yes
option=${option#f}
;;
v*)
option=${option#v}
case $option in
-1*)
g_use_verbosity=-1
option=${option#-1}
;;
0*)
g_use_verbosity=0
option=${option#0}
;;
1*)
g_use_verbosity=1
option=${option#1}
;;
2*)
g_use_verbosity=2
option=${option#2}
;;
*)
g_verbose_offset=$(($g_verbose_offset + 1 ))
g_use_verbosity=
;;
esac
;;
n*)
g_noroutes=Yes
option=${option#n}
;;
t*)
g_timestamp=Yes
option=${option#t}
;;
-)
finished=1
option=
;;
*)
usage 1
;;
esac
done
shift
;;
*)
finished=1
;;
esac
done
if [ $# -eq 0 ]; then
usage 1
fi
PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/bin:/usr/local/sbin
MUTEX_TIMEOUT=
SHAREDIR=/usr/share/shorewall-lite
CONFDIR=/etc/shorewall-lite
g_product="Shorewall Lite"
[ -f ${CONFDIR}/vardir ] && . ${CONFDIR}/vardir ]
[ -n "${VARDIR:=/var/lib/shorewall-lite}" ]
[ -d $VARDIR ] || mkdir -p $VARDIR || fatal_error "Unable to create $VARDIR"
version_file=$SHAREDIR/version
for library in base cli; do
. ${SHAREDIR}/lib.$library
done
ensure_config_path
config=$(find_file shorewall-lite.conf)
if [ -f $config ]; then
if [ -r $config ]; then
. $config
else
echo "Cannot read $config! (Hint: Are you root?)" >&2
exit 1
fi
else
echo "$config does not exist!" >&2
exit 2
fi
ensure_config_path
LITEDIR=${VARDIR}
[ -f ${LITEDIR}/firewall.conf ] && . ${LITEDIR}/firewall.conf
get_config
g_firewall=$LITEDIR/firewall
if [ -f $version_file ]; then
SHOREWALL_VERSION=$(cat $version_file)
else
echo " ERROR: Shorewall Lite is not properly installed" >&2
echo " The file $version_file does not exist" >&2
exit 1
fi
banner="Shorewall Lite $SHOREWALL_VERSION Status at $g_hostname -"
case $(echo -e) in
-e*)
RING_BELL="echo \a"
ECHO_E="echo"
;;
*)
RING_BELL="echo -e \a"
ECHO_E="echo -e"
;;
esac
case $(echo -n "Testing") in
-n*)
ECHO_N=
;;
*)
ECHO_N=-n
;;
esac
COMMAND=$1
case "$COMMAND" in
start)
shift
start_command $@
;;
stop|clear)
[ $# -ne 1 ] && usage 1
verify_firewall_script
[ -n "$nolock" ] || mutex_on
run_it $g_firewall $debugging $COMMAND
[ -n "$nolock" ] || mutex_off
;;
reset)
verify_firewall_script
[ -n "$nolock" ] || mutex_on
run_it $SHOREWALL_SHELL $g_firewall $debugging $@
[ -n "$nolock" ] || mutex_off
;;
restart)
shift
restart_command
;;
show|list)
shift
show_command $@
;;
status)
[ $# -eq 1 ] || usage 1
[ "$(id -u)" != 0 ] && fatal_error "ERROR: The status command may only be run by root"
echo "Shorewall Lite $SHOREWALL_VERSION Status at $g_hostname - $(date)"
echo
if shorewall_is_started ; then
echo "Shorewall Lite is running"
status=0
else
echo "Shorewall Lite is stopped"
status=4
fi
if [ -f ${VARDIR}/state ]; then
state="$(cat ${VARDIR}/state)"
case $state in
Stopped*|Closed*|Clear*)
status=3
;;
esac
else
state=Unknown
fi
echo "State:$state"
echo
exit $status
;;
dump)
shift
dump_command $@
;;
hits)
[ -n "$debugging" ] && set -x
shift
hits_command $@
;;
version)
shift
version_command $@
;;
logwatch)
logwatch_command $@
;;
drop)
[ -n "$debugging" ] && set -x
[ $# -eq 1 ] && usage 1
if shorewall_is_started ; then
[ -n "$nolock" ] || mutex_on
block DROP Dropped $*
[ -n "$nolock" ] || mutex_off
else
error_message "ERROR: Shorewall Lite is not started"
exit 2
fi
;;
logdrop)
[ -n "$debugging" ] && set -x
[ $# -eq 1 ] && usage 1
if shorewall_is_started ; then
[ -n "$nolock" ] || mutex_on
block logdrop Dropped $*
[ -n "$nolock" ] || mutex_off
else
error_message "ERROR: Shorewall Lite is not started"
exit 2
fi
;;
reject|logreject)
[ -n "$debugging" ] && set -x
[ $# -eq 1 ] && usage 1
if shorewall_is_started ; then
[ -n "$nolock" ] || mutex_on
block $COMMAND Rejected $*
[ -n "$nolock" ] || mutex_off
else
error_message "ERROR: Shorewall Lite is not started"
exit 2
fi
;;
allow)
allow_command $@
;;
add)
get_config
shift
add_command $@
;;
delete)
get_config
shift
add_command $@
;;
save)
[ -n "$debugging" ] && set -x
case $# in
1)
;;
2)
RESTOREFILE="$2"
validate_restorefile '<restore file>'
;;
*)
usage 1
;;
esac
g_restorepath=${VARDIR}/$RESTOREFILE
[ "$nolock" ] || mutex_on
save_config
[ "$nolock" ] || mutex_off
;;
forget)
case $# in
1)
;;
2)
RESTOREFILE="$2"
validate_restorefile '<restore file>'
;;
*)
usage 1
;;
esac
g_restorepath=${VARDIR}/$RESTOREFILE
if [ -x $g_restorepath ]; then
rm -f $g_restorepath
rm -f ${g_restorepath}-iptables
rm -f ${g_restorepath}-ipsets
echo " $g_restorepath removed"
elif [ -f $g_restorepath ]; then
echo " $g_restorepath exists and is not a saved Shorewall configuration"
fi
rm -f ${VARDIR}/save
;;
ipcalc)
[ -n "$debugging" ] && set -x
if [ $# -eq 2 ]; then
address=${2%/*}
vlsm=${2#*/}
elif [ $# -eq 3 ]; then
address=$2
vlsm=$(ip_vlsm $3)
else
usage 1
fi
valid_address $address || fatal_error "Invalid IP address: $address"
[ -z "$vlsm" ] && exit 2
[ "x$address" = "x$vlsm" ] && usage 2
[ $vlsm -gt 32 ] && echo "Invalid VLSM: /$vlsm" >&2 && exit 2
address=$address/$vlsm
echo " CIDR=$address"
temp=$(ip_netmask $address); echo " NETMASK=$(encodeaddr $temp)"
temp=$(ip_network $address); echo " NETWORK=$temp"
temp=$(broadcastaddress $address); echo " BROADCAST=$temp"
;;
iprange)
[ -n "$debugging" ] && set -x
case $2 in
*.*.*.*-*.*.*.*)
for address in ${2%-*} ${2#*-}; do
valid_address $address || fatal_error "Invalid IP address: $address"
done
ip_range $2
;;
*)
usage 1
;;
esac
;;
ipdecimal)
[ -n "$debugging" ] && set -x
[ $# -eq 2 ] || usage 1
case $2 in
*.*.*.*)
valid_address $2 || fatal_error "Invalid IP address: $2"
echo " $(decodeaddr $2)"
;;
*)
echo " $(encodeaddr $2)"
;;
esac
;;
restore)
shift
STARTUP_ENABLED=Yes
restore_command $@
;;
call)
[ -n "$debugging" ] && set -x
#
# Undocumented way to call functions in ${SHAREDIR}/functions directly
#
shift
$@
;;
help)
shift
usage
;;
*)
usage 1
;;
esac
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