/sbin/netscript is in netscript-2.4 5.2.9ubuntu1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
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#
# LRP/Debian network configuration system
#
# Ring a ding ding, my dang a lang dong Dave 'Kill a Cop' Cinege GPL2
# Ding Dong Dell, Pussy's in the well Matthew 'Network Cowboy' Grant GPL2
#
# start)
# Depending on the auto config portions in /etc/network.conf, it auto-
# generates hosts, resolv.conf, sets the hostname, starts up interfaces,
# configures the IP filter/firewall and sets up routes (not necessarily
# in that order).
#
# stop)
# brings down all interfaces listed in /proc/net/dev, and their associated
# routes. Flushes all rules for iptables.
#
# bail out if we are not root
if [ "`id -un`" != "root" ] ; then
echo 1>&2
echo " `basename $0`: you must be root to run this command." 1>&2
echo 1>&2
exit 1
fi
TARGET_KERNEL1="2.4"
TARGET_KERNEL2="2.6"
TARGET_KERNEL3="3"
#DEBUG=1
SP=' '
qt () { "$@" >/dev/null 2>&1 ; }
vb () { "$@" ; }
source () { . $1 ; }
basename () { echo "${1##*/}"; }
BANNER="# This file was generated by $0. It may be overwritten!"
#Default safe settings
VERBOSE=YES
IPV6_MODULE=NO
IPV4_FWDING_KERNEL=NO
IPV6_FWDING_KERNEL=NO
IP_FILTER_KERNEL=PACKET
IF_AUTO="eth0"
IPV4_DISABLE=NO
IPV6_DISABLE=NO
MODPATH="/lib/modules/`uname -r`/kernel/net"
KERN_VERSION=`uname -r | cut -d . -f 1,2`
if echo "$KERN_VERSION" | grep '^3\..*' -q; then
KERN_VERSION='3'
fi
[ "$KERN_VERSION" = "$TARGET_KERNEL1" ] && MODEXT="o"
[ "$KERN_VERSION" = "$TARGET_KERNEL2" ] && MODEXT="ko"
[ "$KERN_VERSION" = "$TARGET_KERNEL3" ] && MODEXT="ko"
SCHED_MODPATH="${MODPATH}/sched"
NETFILTER_XMODPATH="${MODPATH}/netfilter"
NETFILTER_V4MODPATH="${MODPATH}/ipv4/netfilter"
NETFILTER_V6MODPATH="${MODPATH}/ipv6/netfilter"
NETFILTER_IPSETMODPATH="${NETFILTER_XMODPATH}/ipset"
NETFILTER_IPVSMODPATH="${NETFILTER_XMODPATH}/ipvs"
QOS_MODULES="sch_cbq sch_sfq sch_red sch_gred cls_fw"
NETFILTER_CONF="/etc/netscript"
IPTBL_FILE="$NETFILTER_CONF/iptables"
IPTBL_FILE_BACKUP="$IPTBL_FILE.backup"
#IPFILTER_DEFS_COMPILED="$NETFILTER_CONF/ipfilter-defs-compiled.conf"
IP6TBL_FILE="$NETFILTER_CONF/ip6tables"
IP6TBL_FILE_BACKUP="$IP6TBL_FILE.backup"
#IP6FILTER_DEFS_COMPILED="$NETFILTER_CONF/ip6filter-defs-compiled.conf"
IPTBL="/sbin/iptables"
IPTBL_RESTORE="/sbin/iptables-restore"
IPTBL_SAVE="/sbin/iptables-save"
IP6TBL="/sbin/ip6tables"
IP6TBL_RESTORE="/sbin/ip6tables-restore"
IP6TBL_SAVE="/sbin/ip6tables-save"
MODULE_PROC="/proc/modules"
IPTBL_V4PROC="/proc/net/ip_tables_names"
IPTBL_V6PROC="/proc/net/ip6_tables_names"
IPV4_PROC="/proc/sys/net/ipv4"
IPV6_PROC="/proc/sys/net/ipv6"
IPFWD_V4PROC="${IPV4_PROC}/ip_forward"
IPFWD_V6PROC="${IPV6_PROC}/conf/all/forwarding"
IPV6_MODPATH=${MODPATH}/ipv6/ipv6.${MODEXT}
IPV6_DEFAULT_PREFIX=default
DEFAULT_METRIC=999999999
IPSPEC_MODULE=NO
IPSEC_MODPATH="${MODPATH}/ipsec/ipsec.${MODEXT}"
IPSEC_EXTMODPATH="${MODPATH}/ipsec/ext"
BACKUP_LEVELS=2
BRG_NETFILTER_REMOVE="YES"
BRG_LIST="brg0"
IF_DEFAULT_IPV6_DISABLE="NO"
INITCTL="/sbin/initctl"
#==============================================================================#
# Read in configuration files
# - these ones can be changed by users
[ -f $NETFILTER_CONF/network.conf ] \
&& source $NETFILTER_CONF/network.conf
IPFILTER=0
[ -f $NETFILTER_CONF/ipfilter.conf ] \
&& source $NETFILTER_CONF/ipfilter.conf && IPFILTER=1
[ -f $NETFILTER_CONF/srvfilter.conf ] \
&& source $NETFILTER_CONF/srvfilter.conf
[ -f $NETFILTER_CONF/if.conf ] \
&& source $NETFILTER_CONF/if.conf
[ -f $NETFILTER_CONF/qos.conf ] \
&& source $NETFILTER_CONF/qos.conf
[ "$DEBUG" ] && qt () { "$@" ; }
[ "$VERBOSE" = "NO" ] && vb () { qt "$@" ; }
[ -f /proc/net/ip_fwchains ] && IPCHAINS=1
[ -f /proc/net/ip_masq/autofw ] && IPAUTOFW=1
[ -f /proc/net/ip_masq/portfw ] && IPPORTFW=1
[ -f /proc/net/ip_masq/mfw ] && IPMFW=1
GDC_PATH=/usr/bin/gdc
IF_LIST="$IF_AUTO"
IFDEVLIST=`cat /proc/net/dev | grep '^[ _a-zA-Z0-9\-]\+:' | sed -e 's/^ *\([a-zA-Z0-9_\-]\+\):.*$/\1/'`
IFDEVLIST="$IFDEVLIST $IF_DYNAMIC"
for DEV in $IFDEVLIST; do
if [ "$DEV" = "lo" ]; then
continue
fi
ANS=`echo "$IF_LIST" | grep $DEV`
if [ -z "$ANS" ]; then
IF_LIST="$IF_LIST $DEV"
fi
done
unset DEV IFDEVLIST ANS
IFLIST="`echo $IF_LIST | sed 's/ /|/g'`|all"
for IF in $IF_LIST; do
REV_IF_LIST="$IF $REV_IF_LIST"
done
unset IF
# determine runlevel for disabling functionality in parallel boot environment
[ -x /sbin/runlevel ] && RUNLVL=`/sbin/runlevel | sed -e 's/^. \(.\)$/\1/'`
# translate old values for compatibility
if [ -n "$IPFWDING_KERNEL" ]; then
IPV4_FWDING_KERNEL="$IPFWDING_KERNEL"
fi
if [ -n "$IPALWAYSDEFRAG_KERNEL" ]; then
case "$IPALWAYSDEFRAG_KERNEL" in
YES|Yes|yes)
IP_FILTER_KERNEL=NAT
;;
NO|No|no)
IP_FILTER_KERNEL=PACKET
;;
esac
fi
if [ -n "$IPV4_FILTER_KERNEL" ]; then
IP_FILTER_KERNEL="$IPV4_FILTER_KERNEL"
fi
# Setup stuff for IPv6
IPV6_KRNL=0
[ -d $IPV6_PROC ] && IPV6_KRNL=1
#############################################################################
# Code to set up function lists for filtering
#############################################################################
get_fns () {
local STR="s/^.* ${1}\([^ ]\+\)$/\1/"
if [ -n "$BASH_VERSION" ]; then
declare -F | grep $1 | sed -e "$STR"
else
hash | grep "^function $1" | sed -e "$STR"
fi
}
for FN in `get_fns ipf4_`; do
if [ -z "$IPF4_FNS" ]; then
IPF4_FNS="$FN"
else
IPF4_FNS="${IPF4_FNS}|$FN"
fi
done; unset FN
for FN in `get_fns ipf6_`; do
if [ -z "$IPF6_FNS" ]; then
IPF6_FNS="$FN"
else
IPF6_FNS="${IPF6_FNS}|$FN"
fi
done; unset FN
###############################################################################
#Module loading on start up for iptables and QoS
###############################################################################
ls_mod () {
if qt type lsmod && [ -f "$MODULE_PROC" ] && [ -z "$LS_MOD" ]; then
LS_MOD=`lsmod | sed -e 's/^\([a-zA-Z0-9_\-]\+\) .*$/\1/'`
fi
echo "$LS_MOD"
return 0
}
check_mod () {
local MOD
for MOD in `ls_mod`; do
if [ "$MOD" = "$1" ]; then
return 0
fi
done
return 1
}
load_mod () {
local MODNAME
MODNAME="${1##*/}"
MODNAME="${MODNAME%.$MODEXT}"
# Check that the kernel supports modules
if [ ! -f "$MODULE_PROC" ]; then
return 0
fi
if [ ! -f $1 ]; then
return 0
fi
if ! check_mod $MODNAME; then
/sbin/insmod $1
fi
}
unload_mod () {
local MODNAME
MODNAME="${1##*/}"
MODNAME="${MODNAME%.$MODEXT}"
check_mod $MODNAME && /sbin/rmmod $MODNAME > /dev/null 2>&1
}
IPSEC_EXTMOD_EXCLUDE="aes-opt"
ipsec_start_mod () {
local I ANS
if [ "$IPSEC_MODULE" != "YES" -a "$IPSEC_MODULE" != "Yes" \
-a "$IPSEC_MODULE" != "yes" ]; then
ipsec_stop_mod
return 0
fi
if [ ! -f "$IPSEC_MODPATH" ]; then
return 0
fi
load_mod "$IPSEC_MODPATH"
if [ -d $IPSEC_EXTMODPATH ]; then
for I in ${IPSEC_EXTMODPATH}/ipsec_*; do
ANS="${I##*_}"
ANS="${ANS%.$MODEXT}"
eval "case \"$ANS\" in
$IPSEC_EXTMOD_EXCLUDE)
continue;
;;
esac"
load_mod $I
done
fi
return 0
}
ipsec_stop_mod () {
local I
if [ -d $IPSEC_EXTMODPATH ]; then
for I in ${IPSEC_EXTMODPATH}/ipsec_*; do
unload_mod $I
done
fi
unload_mod "$IPSEC_MODPATH"
return 0
}
ipv6_start_mod () {
if [ "$IPV6_MODULE" != "YES" -a "$IPV6_MODULE" != "Yes" \
-a "$IPV6_MODULE" != "yes" ]; then
ipv6_stop_mod
return 0
fi
if [ $IPV6_KRNL -eq 1 ]; then
return 0
fi
if [ ! -f "$IPV6_MODPATH" ]; then
return 0
fi
load_mod "$IPV6_MODPATH"
# Enable IPv6
IPV6_KRNL=1
return 1
}
ipv6_stop_mod () {
unload_mod "$IPV6_MODPATH"
}
qos_start_mod () {
local I
if [ -d $SCHED_MODPATH ] ; then
for I in $QOS_MODULES; do
load_mod "$SCHED_MODPATH/${I}.${MODEXT}"
done
fi
}
qos_stop_mod () {
local I
if [ -d $SCHED_MODPATH ] ; then
for I in $SCHED_MODPATH/cls_* $SCHED_MODPATH/sch_*; do
unload_mod $I
done
fi
}
# These exist to make the following code easier to understand
X_BASE_MODS="x_tables nfnetlink nfnetlink_log nfnetlink_queue xt_RATEEST"
X_BASE_MODS_REV="xt_RATEEST nfnetlink_queue nfnetlink_log nfnetlink x_tables"
X_STATE_MODS_CASE="state|helper|connbytes|connlimit|conntrack|connmark|cluster|CONNMARK|NOTRACK|CONNSECMARK|hashlimit|CT|TEE|socket|TPROXY|ipvs"
X_STATE_MODS="xt_state xt_helper xt_connbytes xt_connlimit xt_conntrack xt_connmark xt_cluster xt_CONNMARK xt_NOTRACK xt_CONNSECMARK xt_CT xt_TEE"
x_nfbase_start_mod () {
local I ANS
case "$IP_FILTER_KERNEL" in
PACKET|Packet|packet|NAT|Nat|nat|STATEFUL|Stateful|stateful)
# load the base netfilter modules
for I in $X_BASE_MODS; do
load_mod $NETFILTER_XMODPATH/${I}.${MODEXT}
done
# Load all the ipset modules
for I in $NETFILTER_IPSETMODPATH/ip_set.${MODEXT} \
$NETFILTER_IPSETMODPATH/ip_set_*; do
load_mod $I
done
# Load all the x_ modules save stateful ones
for I in $NETFILTER_XMODPATH/xt_*; do
ANS="${I##*_}"
ANS="${ANS%.$MODEXT}"
eval "case \"$ANS\" in
$X_STATE_MODS_CASE)
continue;
;;
esac"
load_mod $I
done
return 2
;;
*|NONE|None|none)
return 1
;;
esac
}
x_nfbase_stop_mod () {
local I ANS
# Unload all the xt_ modules save stateful ones
for I in $NETFILTER_XMODPATH/xt_*; do
ANS="${I##*_}"
ANS="${ANS%.$MODEXT}"
eval "case \"$ANS\" in
$X_STATE_MODS_CASE)
continue;
;;
esac"
unload_mod $I
done
# Unload all the ipset modules
for I in $NETFILTER_IPSETMODPATH/ip_set_* \
$NETFILTER_IPSETMODPATH/ip_set.${MODEXT}; do
unload_mod $I
done
# Unload the base netfilter modules
for I in $X_BASE_MODS_REV; do
unload_mod $NETFILTER_XMODPATH/${I}.${MODEXT}
done
return 0
}
# These exist to make the following code easier to understand
IPV4_BASE_MODS="ip_tables iptable_filter iptable_mangle ip_queue ip_pool"
IPV4_BASE_MODS_REV="iptable_filter iptable_mangle ip_queue ip_pool ip_tables"
IPV4_STATE_MODS_CASE="defrag_ipv4|helper|state|iplimit|REDIRECT|MASQUERADE|conntrack|NETMAP|SAME|nat|CLUSTERIP"
IPV4_STATE_MODS="ipt_helper ipt_state ipt_iplimit ipt_REDIRECT ipt_MASQUERADE ipt_conntrack ipt_NETMAP ipt_SAME ipt_CLUSTERIP xt_ipvs"
ipv4_nfbase_start_mod () {
local I ANS
# load the base netfilter modules
for I in $IPV4_BASE_MODS; do
load_mod $NETFILTER_V4MODPATH/${I}.${MODEXT}
done
# Load all the ipt_ modules save ipt_helper, ipt_state,
# ipt_REDIRECT, ipt_MASQUERADE and ipt_iplimit
for I in $NETFILTER_V4MODPATH/ipt_*; do
ANS="${I##*_}"
ANS="${ANS%.$MODEXT}"
eval "case \"$ANS\" in
$IPV4_STATE_MODS_CASE)
continue;
;;
esac"
load_mod $I
done
return 0
}
ipv4_nfnat_start_mod () {
local I
# Load conection tracking
for I in $NETFILTER_V4MODPATH/ip_conntrack.${MODEXT} \
$NETFILTER_V4MODPATH/nf_defrag_ipv4.${MODEXT} \
$NETFILTER_XMODPATH/nf_conntrack.${MODEXT} \
$NETFILTER_XMODPATH/nf_conntrack_proto_gre.${MODEXT} \
$NETFILTER_XMODPATH/nf_conntrack_* \
$NETFILTER_XMODPATH/nf_tproxy_* \
$NETFILTER_V4MODPATH/nf_conntrack_* \
$NETFILTER_V4MODPATH/ip_conntrack_*; do
ANS="${I##*/}"
ANS="${ANS%.$MODEXT}"
case $ANS in
nf_conntrack_netlink)
continue;
;;
esac
load_mod $I
done
# Load NAT modules
for I in $NETFILTER_V4MODPATH/ip_nat.${MODEXT} \
$NETFILTER_V4MODPATH/nf_nat.${MODEXT} \
$NETFILTER_V4MODPATH/nf_conntrack_netlink.${MODEXT} \
$NETFILTER_V4MODPATH/iptable_nat.${MODEXT} \
$NETFILTER_V4MODPATH/ip_nat*.${MODEXT};
do
load_mod $I
done
# Load virtual server modules
for I in $NETFILTER_IPVSMODPATH/ip_vs.${MODEXT} \
$NETFILTER_IPVSMODPATH/ip_vs_*; do
load_mod $I
done
# Load rest of xt_ modules
for I in $X_STATE_MODS; do
load_mod $NETFILTER_XMODPATH/${I}.${MODEXT}
done
# Load rest of ipt_ modules
for I in $IPV4_STATE_MODS; do
load_mod $NETFILTER_V4MODPATH/${I}.${MODEXT}
done
return 0
}
ipv4_nfnat_stop_mod () {
local I
# Unload rest of ipt_ modules
for I in $IPV4_STATE_MODS; do
unload_mod $NETFILTER_V4MODPATH/${I}.${MODEXT}
done
# Unload rest of xt_ modules
for I in $X_STATE_MODS; do
unload_mod $NETFILTER_XMODPATH/${I}.${MODEXT}
done
# Unoad virtual server modules
for I in $NETFILTER_IPVSMODPATH/ip_vs_* \
$NETFILTER_IPVSMODPATH/ip_vs.${MODEXT}; do
unload_mod $I
done
# Unload NAT modules
for I in $NETFILTER_V4MODPATH/ip_nat*.${MODEXT} \
$NETFILTER_V4MODPATH/iptable_nat.${MODEXT} \
$NETFILTER_V4MODPATH/nf_conntrack_netlink.${MODEXT} \
$NETFILTER_V4MODPATH/nf_nat.${MODEXT} \
$NETFILTER_V4MODPATH/ip_nat.${MODEXT};
do
unload_mod $I
done
# Unload conection tracking
for I in $NETFILTER_V4MODPATH/ip_conntrack_* \
$NETFILTER_V4MODPATH/nf_conntrack_* \
$NETFILTER_V4MODPATH/nf_defrag_ipv4 \
$NETFILTER_XMODPATH/nf_conntrack_pptp.${MODEXT} \
$NETFILTER_XMODPATH/nf_tproxy_* \
$NETFILTER_XMODPATH/nf_conntrack_* \
$NETFILTER_XMODPATH/nf_conntrack.${MODEXT} \
$NETFILTER_V4MODPATH/ip_conntrack.${MODEXT}; do
unload_mod $I
done
return 0
}
ipv4_nf_stop_mod () {
local I ANS
# Unload all nat and connection tracking modules
ipv4_nfnat_stop_mod
# Unload all the ipt_ modules save ipt_state, ipt_REDIRECT
# ipt_iplimit and ipt_MASQUERADE
for I in $NETFILTER_V4MODPATH/ipt_*; do
ANS="${I##*_}"
ANS="${ANS%.$MODEXT}"
eval "case \"$ANS\" in
$IPV4_STATE_MODS_CASE)
continue;
;;
esac"
unload_mod $I
done
# Unload the core netfilter modules
for I in $IPV4_BASE_MODS_REV; do
unload_mod $NETFILTER_V4MODPATH/${I}.${MODEXT}
done
return 0
}
ipv4_nf_start_mod () {
case "$IP_FILTER_KERNEL" in
PACKET|Packet|packet)
# Stop NAT level modules to provide packet reasembly switch
# functionality
ipv4_nfnat_stop_mod
# Load Netfilter base modules
ipv4_nfbase_start_mod
return 2
;;
NAT|Nat|nat|STATEFUL|Stateful|stateful)
ipv4_nfbase_start_mod
ipv4_nfnat_start_mod
return 3
;;
*|NONE|None|none)
return 1
;;
esac
}
# IPv6 Module strings - adjust these to suite as needed
IPV6_BASE_MODS="ip6_tables ip6table_filter ip6table_mangle"
IPV6_BASE_MODS_REV="ip6table_filter ip6table_mangle ip6_tables"
IPV6_STATE_MODS_CASE='""'
IPV6_STATE_MODS=""
ipv6_nfbase_start_mod () {
local I ANS
# load the base netfilter modules
for I in $IPV6_BASE_MODS; do
load_mod $NETFILTER_V6MODPATH/${I}.${MODEXT}
done
# Load all the ipt_ modules save ip6t_state, ip6t_REDIRECT
# ip6t_MASQUERADE and ip6t_iplimit
for I in $NETFILTER_V6MODPATH/ip6t_*; do
ANS="${I##*_}"
ANS="${ANS%.$MODEXT}"
eval "case \"$ANS\" in
$IPV6_STATE_MODS_CASE)
continue;
;;
esac"
load_mod $I
done
load_mod $NETFILTER_XMODPATH/xt_hashlimit.${MODEXT}
return 0
}
ipv6_nfnat_start_mod () {
local I
# Load conection tracking
for I in $NETFILTER_V6MODPATH/ip6_conntrack.${MODEXT} \
$NETFILTER_V6MODPATH/ip6_conntrack_* \
$NETFILTER_V6MODPATH/nf_defrag_ipv6.${MODEXT} \
$NETFILTER_V6MODPATH/nf_conntrack_ipv6.${MODEXT}; do
load_mod $I
done
# Load NAT modules
for I in $NETFILTER_V6MODPATH/ip6table_nat.${MODEXT} $NETFILTER_V6MODPATH/ip6_nat*.${MODEXT};
do
load_mod $I
done
# Load xt_socket and xt_TPROXY
load_mod $NETFILTER_XMODPATH/xt_socket.${MODEXT}
load_mod $NETFILTER_XMODPATH/xt_TPROXY.${MODEXT}
# Load rest of ip6t_ modules
for I in $IPV6_STATE_MODS; do
load_mod $NETFILTER_V6MODPATH/${I}.${MODEXT}
done
return 0
}
ipv6_nfnat_stop_mod () {
local I
# Unload rest of ip6t_ modules
for I in $IPV6_STATE_MODS; do
unload_mod $NETFILTER_V6MODPATH/${I}.${MODEXT}
done
# Unload xt_socket and xt_TPROXY
unload_mod $NETFILTER_XMODPATH/xt_TPROXY.${MODEXT}
unload_mod $NETFILTER_XMODPATH/xt_socket.${MODEXT}
# Unload NAT modules
for I in $NETFILTER_V6MODPATH/ip6_nat*.${MODEXT} $NETFILTER_V6MODPATH/ip6table_nat.${MODEXT};
do
unload_mod $I
done
# Unload conection tracking
for I in $NETFILTER_V6MODPATH/nf_conntrack_ipv6.${MODEXT} \
$NETFILTER_V6MODPATH/nf_defrag_ipv6.${MODEXT} \
$NETFILTER_XMODPATH/nf_conntrack.${MODEXT} \
$NETFILTER_V6MODPATH/ip6_conntrack_* \
$NETFILTER_V6MODPATH/ip6_conntrack.${MODEXT}; do
unload_mod $I
done
return 0
}
ipv6_nf_stop_mod () {
local I ANS
# Unload all nat and connection traking modules
ipv6_nfnat_stop_mod
unload_mod $NETFILTER_XMODPATH/xt_hashlimit.${MODEXT}
# Unload all the ipt_ modules save ipt_state, ipt_REDIRECT
# ipt_iplimit and ipt_MASQUERADE
for I in $NETFILTER_V6MODPATH/ip6t_*; do
ANS="${I##*_}"
ANS="${ANS%.$MODEXT}"
eval "case \"$ANS\" in
$IPV6_STATE_MODS_CASE)
continue;
;;
esac"
unload_mod $I
done
# Unload the core netfilter modules
for I in $IPV6_BASE_MODS_REV; do
unload_mod $NETFILTER_V6MODPATH/${I}.${MODEXT}
done
return 0
}
ipv6_nf_start_mod () {
if [ $IPV6_KRNL -lt 1 ]; then
return 0
fi
case "$IP_FILTER_KERNEL" in
PACKET|Packet|packet)
# Stop NAT level modules to provide packet reasembly switch
# functionality
ipv6_nfnat_stop_mod
# Load Netfilter base modules
ipv6_nfbase_start_mod
return 2
;;
NAT|Nat|nat|STATEFUL|Stateful|stateful)
ipv6_nfbase_start_mod
ipv6_nfnat_start_mod
return 3
;;
*|NONE|None|none)
return 1
;;
esac
}
start_mod () {
local NFXRES NFV4RES NFV6RES V6RES
vb echo "Loading networking modules..."
# Load QoS modules
qos_start_mod
# Load Free S/WAN ipsec modules
ipsec_start_mod
# Load IPv6
ipv6_start_mod
V6RES=$?
# Load X Netfilter modules
x_nfbase_start_mod
NFXRES=$?
# Load IPv4 NetFilter
ipv4_nf_start_mod
NFV4RES=$?
# Load IPv6 Netfilter
ipv6_nf_start_mod
NFV6RES=$?
vb echo "Networking modules loaded."
case "$NFV4RES" in
3)
vb echo "IPv4 filtering level is \`STATEFUL/NAT'."
;;
2)
vb echo "IPv4 filtering level is \`PACKET'."
;;
1)
vb echo "IPv4 filtering level is \`NONE'."
;;
esac
case "$V6RES" in
1)
vb echo "IPv6 protocol module is loaded."
;;
esac
case "$NFV6RES" in
3)
vb echo "IPv6 filtering level is \`STATEFUL/NAT'."
;;
2)
vb echo "IPv6 filtering level is \`PACKET'."
;;
1)
vb echo "IPv6 filtering level is \`NONE'."
;;
esac
return 0
}
stop_mod () {
# Unload IPv6 Netfilter
ipv6_nf_stop_mod
# Unload all IPv4 Netfilter modules
ipv4_nf_stop_mod
# Unload all X Netfilter modules
x_nfbase_stop_mod
# Unload IPv6
ipv6_stop_mod
# Unload Free S/WAN ipsec modules
ipsec_stop_mod
# Unload QoS modules
qos_stop_mod
return 0
}
###############################################################################
#IP kernel option loading for global kernel switches
###############################################################################
read_sysctl () {
local PROCFILE PROCVAL COMMENT ANS
while read PROCFILE PROCVAL COMMENT; do
if [ -z "$PROCFILE" -o -z "$PROCVAL" ]; then
continue
fi
if [ "$PROCFILE" = "#" -o "$PROCVAL" = "#" ]; then
continue
fi
case "$PROCVAL" in
YES|Yes|yes)
PROCVAL=1
;;
NO|No|no)
PROCVAL=0
;;
esac
[ ! -f $1/$PROCFILE ] && continue
echo $PROCVAL > $1/$PROCFILE
done
}
read_gbl_sysctl () {
echo "$NET_GLOBAL_SYSCTL" | read_sysctl /proc/sys/net
return 0
}
###############################################################################
#IP Forwarding configuration
###############################################################################
start_auto_ipkrnlswch () {
local DIR
# read in the global sysctl settings
read_gbl_sysctl
# Turn on global RP filter switch - this is ANDed with
# the per interface ones
echo 1 > ${IPV4_PROC}/conf/all/rp_filter
# Fix the Shared Media Mess
echo 0 > ${IPV4_PROC}/conf/all/shared_media
echo 0 > ${IPV4_PROC}/conf/default/shared_media
if [ "$IPV4_FWDING_KERNEL" = "YES" ]; then
vb echo -n "Enabling IPv4 packet forwarding..."
echo "1" >$IPFWD_V4PROC && vb echo "done."
elif [ "$IPV4_FWDING_KERNEL" != "FILTER_ON" ]; then
vb echo -n "Disabling IPv4 packet forwarding..."
echo "0" >$IPFWD_V4PROC && vb echo "done."
fi
# IPv6
if [ $IPV6_KRNL -lt 1 ]; then
return 0
fi
# Most hardened servers and routers need defaults like these
# for interface host mode
for DIR in ${IPV6_PROC}/conf/*; do
# Don't allow ICMP redirect by default
echo 0 > $DIR/accept_redirects
done
# This is here just to do the printing when IPv6 IS disabled.
case "$IPV6_DISABLE" in
YES|Yes|yes)
vb echo -n "Disabling IPv6 protocol..."
ifv6_setproc all disable_ipv6 "$IPV6_DISABLE" && echo "done."
;;
*)
ifv6_setproc all disable_ipv6 "$IPV6_DISABLE"
;;
esac
# Set this flag as required for creation of dynamic bridged
# interfaces
ifv6_setproc default disable_ipv6 "$IF_DEFAULT_IPV6_DISABLE"
if [ "$IPV6_FWDING_KERNEL" = "YES" ]; then
vb echo -n "Enabling IPv6 packet forwarding..."
echo "1" >$IPFWD_V6PROC && vb echo "done."
elif [ "$IPV6_FWDING_KERNEL" != "FILTER_ON" ]; then
vb echo -n "Disabling IPv6 packet forwarding..."
echo "0" >$IPFWD_V6PROC && vb echo "done."
fi
}
###############################################################################
#Interface configuration
###############################################################################
start_auto_if () {
###
#localhost interface
####################
vb echo -n "Configuring loopback interface lo..."
if_lo_up && vb echo "done."
# Do the rest of the interfaces
iface_up all
}
##############################################################################
# Interface stuff iface_up, iface_down, iface_reset, iface_upstart_emit
##############################################################################
iface_up () {
local IF
vb echo -n "Configuring interface:"
if [ "$1" = "all" ] ; then
for IF in $IF_AUTO; do
if_up $IF && vb echo -n " $IF"
done
unset IF
else
# Don't do anything during boot or shutdown
case "$RUNLVL" in
unknown|0|1|6)
vb echo "."
return 0
;;
esac
eval local IF_CHAIN_AUTO=\"\${"$1"_IF_CHAIN_AUTO:-""}\"
if_up $1 && vb echo -n " $1"
for IF in $IF_CHAIN_AUTO; do
if_up $IF && vb echo -n " $IF"
done
unset IF
fi
vb echo "."
}
iface_down () {
local IF
vb echo -n "Stopping interface:"
if [ "$1" = "all" ] ; then
for IF in $REV_IF_LIST; do
if_down $IF && vb echo -n " $IF"
done
unset IF
else
# Don't do anything during boot or shutdown
case "$RUNLVL" in
unknown|0|1|6)
vb echo "."
return 0
;;
esac
local REV_IF_CHAIN
eval local IF_CHAIN=\"\${"$1"_IF_CHAIN:-""}\"
eval local IF_CHAIN_AUTO=\"\${"$1"_IF_CHAIN_AUTO:-""}\"
IF_CHAIN="$IF_CHAIN_AUTO $IF_CHAIN"
for IF in $IF_CHAIN; do
REV_IF_CHAIN="$REV_IF_CHAIN $IF"
done
unset IF
for IF in $REV_IF_CHAIN; do
if_down $IF && vb echo -n " $IF"
done
unset IF
if_down $1 && vb echo -n " $1"
fi
vb echo "."
}
iface_reset () {
iface_down $1
sleep 2
iface_up $1
# If gated is around, tell it all about this!
[ -f $GDC_PATH ] && vb echo -n "Telling gated..."
[ -f $GDC_PATH ] && sleep 5 && $GDC_PATH interface
[ -f $GDC_PATH ] && vb echo "done."
}
iface_qos () {
vb echo -n "Reloading QoS for interface: "
if [ "$1" = "all" ] ; then
for IF in $IF_AUTO; do
ip_QoSppp $IF
ip_QoSclear $IF && ip_QoS $IF && vb echo -n " $IF"
done
unset IF
else
ip_QoSppp $1
ip_QoSclear $1 && ip_QoS $1 && vb echo -n " $1"
fi
vb echo "."
return 0
}
iface_upstart_emit () {
if ! [ -x "$INITCTL" ]; then
return 0
fi
$INITCTL emit --no-wait "$@"
}
##############################################################################
# Functions to set 2.4 kernel interface parameters
# ifv4_setproc (<interface> <file> YES|NO
# ifv6_setproc (<interface> <file> YES|NO
##############################################################################
ifv4_setproc () {
if [ -z "$3" ]; then
return 0;
fi
[ ! -f ${IPV4_PROC}/conf/$1/$2 ] && return 1
case "$3" in
YES|Yes|yes)
echo 1 > ${IPV4_PROC}/conf/$1/$2
return 0;
;;
NO|No|no)
echo 0 > ${IPV4_PROC}/conf/$1/$2
return 0;
;;
*)
if echo $3 | grep -q '^[0-9]\+$'; then
echo $3 > ${IPV4_PROC}/conf/$1/$2
return 0
fi
return 1;
;;
esac
return 0;
}
ifv6_setproc () {
if [ -z "$3" ]; then
return 0;
fi
[ $IPV6_KRNL -lt 1 ] && return 1
[ ! -f ${IPV6_PROC}/conf/$1/$2 ] && return 1
case "$3" in
YES|Yes|yes)
echo 1 > ${IPV6_PROC}/conf/$1/$2
return 0;
;;
NO|No|no)
echo 0 > ${IPV6_PROC}/conf/$1/$2
return 0;
;;
*)
if echo $3 | grep -q '^[0-9]\+$'; then
echo $3 > ${IPV6_PROC}/conf/$1/$2
return 0
fi
return 1;
;;
esac
return 0;
}
##############################################################################
# Functions to configure the bridge
# brg_global()
##############################################################################
brg_unbind_netfilter () {
local STUFF
# Unbind bridges from Netfilter
if [ "$BRG_NETFILTER_REMOVE" != "NO" \
-a "$BRG_NETFILTER_REMOVE" != "No" \
-a "$BRG_NETFILTER_REMOVE" != "no" ]; then
STUFF="
# Disable netfilter in bridge(s) - useful when not
# doing bridge filtering.
bridge/bridge-nf-call-ip6tables NO
bridge/bridge-nf-call-iptables NO
bridge/bridge-nf-call-arptables NO
bridge/bridge-nf-filter-pppoe-tagged NO
bridge/bridge-nf-filter-vlan-tagged NO
"
echo "$STUFF" | read_sysctl /proc/sys/net
else
STUFF="
# Disable netfilter in bridge(s) - useful when not
# doing bridge filtering.
bridge/bridge-nf-call-ip6tables YES
bridge/bridge-nf-call-iptables YES
bridge/bridge-nf-call-arptables YES
bridge/bridge-nf-filter-pppoe-tagged YES
bridge/bridge-nf-filter-vlan-tagged YES
"
echo "$STUFF" | read_sysctl /proc/sys/net
fi
return 0
}
brg_global() {
local INT BRG ANS
local BRG_DEVLIST
case "$BRG_SWITCH" in
YES|Yes|yes)
BRG_LIST="$BRG_LIST"
;;
NO|No|no)
unset BRG_LIST
;;
0|1|2|3|4|5|6|7|8|9|10)
INT=0
while [ $INT -lt $BRG_SWITCH ]; do
BRG_LIST="$BRG_LIST brg${INT}"
INT=$(( $INT + 1 ))
done
;;
esac
BRG_DEVLIST=`brctl show | sed -e '1d' | grep '^[-a-zA-Z0-9_]' | sed -e 's/^\([a-zA-Z0-9_\-]\+\)[ ].*$/\1/'`
for BRG in $BRG_DEVLIST; do
ANS=`echo $BRG_LIST | grep $BRG`
if [ -z "$ANS" ]; then
qt ip link set dev $BRG down
brctl delbr $BRG
fi
done
for BRG in $BRG_LIST; do
brctl addbr $BRG > /dev/null 2>&1
done
brg_unbind_netfilter
return 0
}
brg_iface () {
local BRG ANS
case $2 in
up)
if [ "$3" = "NO" -o "$3" = "No" -o "$3" = "no" ]; then
return 0
fi
if [ "$3" = "YES" -o "$3" = "Yes" -o "$3" = "yes" ]; then
BRG=brg0
else
BRG=$3
fi
[ -z "$BRG" ] && return 0
ANS="echo $BRG_LIST | grep $BRG"
if [ -n "$ANS" ]; then
brctl addif $BRG $1 > /dev/null 2>&1
[ -z "$4" ] && ifv6_setproc $1 disable_ipv6 YES
fi
;;
down)
BRG=`brctl show | sed -e '1d' | grep "${1}\$" | sed -e 's/^\([a-zA-Z]\+[0-9]\+\)[ ]\+.*$/\1/'`
[ -z "$BRG" ] && BRG=brg0
brctl delif $BRG $1 > /dev/null 2>&1
[ -z "$3" ] && ifv6_setproc $1 disable_ipv6 NO
;;
esac
return 0
}
##############################################################################
# Functions to set the default route
##############################################################################
ipv4_default_route () {
if [ "$1" != "$IPV4_DEFAULT_GWDEV" ]; then
return 0
fi
# Default route support
case "$IPV4_DEFAULT_GW" in
OTHER|Other|other|OFF|Off|off|NO|No|no)
;;
"")
ip route del default metric $DEFAULT_METRIC > /dev/null 2>&1
;;
*)
ip route replace default via $IPV4_DEFAULT_GW \
metric $DEFAULT_METRIC
;;
esac
return 0
}
ipv6_default_route () {
if [ "$1" != "$IPV6_DEFAULT_GWDEV" ]; then
return 0
fi
# IPv6 default route - this could be better
case "$IPV6_DEFAULT_GW" in
OTHER|Other|other|OFF|Off|off|NO|No|no)
;;
"")
ip -6 route del $IPV6_DEFAULT_PREFIX metric $DEFAULT_METRIC \
> /dev/null 2>&1
;;
*)
local IPV6_ZERO_GW=`echo $IPV6_DEFAULT_GW \
| eval $SED_IPV6ADDR`
if ! ip -6 route list $IPV6_DEFAULT_PREFIX \
| grep -q "$IPV6_ZERO_GW.*metric $DEFAULT_METRIC";
then
ip -6 route del $IPV6_DEFAULT_PREFIX \
metric $DEFAULT_METRIC > /dev/null 2>&1
ip -6 route add $IPV6_DEFAULT_PREFIX \
metric $DEFAULT_METRIC via $IPV6_DEFAULT_GW
fi
;;
esac
}
##############################################################################
# checkarg() a function to check interface arguments
##############################################################################
checkarg() {
eval "case \"$*\" in
$IFLIST)
;;
*)
echo \"Usage: `basename $0` ifup|ifdown|ifqos|ifreload\"
echo \" ${SP} {$IFLIST}\"
exit 1
;;
esac"
}
##############################################################################
# functions to handle filter stuff
##############################################################################
#
# backup_rotate <filename> <maxlevel>
#
backup_rotate () {
local MAX="$2"
[ $MAX -lt 2 ] && MAX=2
local COUNT=$(($MAX - 1))
local PREV="$MAX"
while [ $COUNT -gt 0 ]; do
[ -f "${1}.${COUNT}" ] && mv "${1}.${COUNT}" "${1}.${PREV}"
PREV=$COUNT
COUNT=$(( $COUNT - 1 ))
done
[ -f "$1" ] && mv "$1" "${1}.1"
return 0
}
ipv4filter_kernfwd () {
local OVERRIDE="$2"
if [ "$OVERRIDE" != "YES" -a "$OVERRIDE" != "Yes" \
-a "$OVERRIDE" != "yes" \
-a "$IPV4_FWDING_KERNEL" != "FILTER_ON" ]; then
return 0;
fi
case $1 in
on)
vb echo -n "Enabling IPv4 packet forwarding..."
echo "1" >$IPFWD_V4PROC \
&& vb echo "done."
;;
off)
vb echo -n "Disabling IPv4 packet forwarding..."
echo "0" >$IPFWD_V4PROC \
&& vb echo "done."
;;
*)
echo "AAARGGHH - wrong argument given to ipv4filter_kernfwd: $1"
exit 1
;;
esac
}
# Check and see if filtering and mangling are available
ipv4filter_check () {
local TBL MANGLE FILTER
MANGLE=0
FILTER=0
[ ! -f "$IPTBL_V4PROC" ] && return 1
for TBL in `cat $IPTBL_V4PROC`; do
case $TBL in
mangle)
MANGLE=1
;;
filter)
FILTER=1
;;
esac
done
if [ $MANGLE -ne 1 -a $FILTER -ne 1 ]; then
return 1
fi
return 0
}
# A function to flush the filters (for internal use)
ipv4filter_flush () {
local TBL
# Flush the IPV4 filters out, and user defined chains
[ ! -f $IPTBL_V4PROC ] && return 0
for TBL in `cat $IPTBL_V4PROC`; do
if [ "$TBL" = "$1" ]; then
continue
fi
$IPTBL -t $TBL -F
$IPTBL -t $TBL -X
done
return 0
}
ipv4filter_policy () {
local TBL
[ ! -f $IPTBL_V4PROC ] && return 0
for TBL in `cat $IPTBL_V4PROC`; do
if [ "$TBL" = "$2" ]; then
continue
fi
case $TBL in
mangle)
$IPTBL -t $TBL -P PREROUTING $1
$IPTBL -t $TBL -P OUTPUT $1
;;
filter)
$IPTBL -t $TBL -P INPUT $1
$IPTBL -t $TBL -P FORWARD $1
$IPTBL -t $TBL -P OUTPUT $1
;;
nat)
$IPTBL -t $TBL -P PREROUTING $1
$IPTBL -t $TBL -P POSTROUTING $1
$IPTBL -t $TBL -P OUTPUT $1
;;
esac
done
return 0
}
# function to set the filter default policies
ipv4filter_clear () {
ipv4filter_flush $1
ipv4filter_policy ACCEPT $1
return 0
}
# Selects basic filter type configuration function
ipv4filter_iptbl_cfg () {
if ! ipv4filter_check; then
echo
echo "IPv4 filters: netfilter kernel modules not loaded."
echo
return 1
fi
if [ ! -f $1 ] ; then
echo
echo "IPv4 filters: no $1 file."
echo
return 1
fi
echo -n "Loading IPv4 filters..."
if $IPTBL_RESTORE < $1; then
ipv4filter_fairq
ipf4_laptopfw
vb echo "done."
ipv4filter_kernfwd on
else
return 1
fi
return 0
}
ipv4filter_compile_cfg () {
if ! ipv4filter_check; then
echo
echo "IPv4 filters: netfilter kernel modules not loaded."
echo
return 1
fi
local NO_COMPILE=0
if [ "$1" = "-n" ]; then
local NO_COMPILE=1
shift
fi
if ! qt type ipf4_${2} ; then
echo
echo "IPv4 filters: no $2 configure function."
echo
return 1
fi
# Compile IPv4 filters
if [ $NO_COMPILE -le 0 ]; then
netscript-compile -b "$BACKUP_LEVELS" || true
fi
if [ ! -f "$1" ]; then
echo
echo "IPv4 filters: no $1 file."
echo
return 1
fi
# Load fresh copy of file...
source "$1"
echo -n "Configuring IPv4 filters..."
if ipf4_${2}; then
ipv4filter_fairq
vb echo "done."
ipv4filter_kernfwd on
else
return 1
fi
return 0
}
ipv4filter_iptbl_save () {
local OLD_UMASK
if [ -n "$IPV4_CONFIGURE_SWITCH" ]; then
echo
echo "IPv4 filters: compile mode selected - can't save iptables state."
echo
return 1
fi
if ! ipv4filter_check; then
echo
echo "IPv4 filters: netfilter kernel modules not loaded."
echo
return 1
fi
echo -n "Saving IPv4 filters..."
backup_rotate "$IPTBL_FILE" "$BACKUP_LEVELS"
OLD_UMASK=`umask`
umask 0277
if $IPTBL_SAVE > $IPTBL_FILE; then
umask $OLD_UMASK
chmod 0400 $IPTBL_FILE
vb echo "done."
else
umask $OLD_UMASK
vb echo
return 1
fi
vb echo
return 0
}
# Some functions to handle Protocol IP Port tuples
ipfilter_echoParam () {
local format="$1"
local IFS='_'
set -- $2
eval "echo \"$format\""
}
ipfilter_echoIpPort () {
local format1="$1"
local format2="$2"
local testpar="$3"
local IFS='_'
set -- $4
eval "echo -n \"$format1\""
eval "if [ -n \"$testpar\" ]; then
echo \" $format2\"
fi"
}
ipv4filter_delTie () {
local CHAIN="$1"
shift
qt $IPTBL -t mangle -D "$CHAIN" $*
qt $IPTBL -t mangle -D "$CHAIN" -s 0/0 $*
qt $IPTBL -t mangle -D "$CHAIN" -d 0/0 $*
qt $IPTBL -t mangle -D "$CHAIN" -d 0/0 -s 0/0 $*
return 0
}
# A function to mark packets for classification
ipv4filter_fairq () {
local CLS
local TNL
if ! ipv4filter_check; then
return 1
fi
[ -z "$MANGLE_OUTPUT_BYPASS" ] && [ -z "$CLS_FAIRQ" ] && return 0
qt $IPTBL -t mangle -F nomangle
qt $IPTBL -t mangle -N nomangle
# Accept IPv4 tunnel traffic - any changes on
# OUTPUT chain will cause rerouting, and Free S/WAN problems
for TNL in $MANGLE_OUTPUT_BYPASS; do
$IPTBL -t mangle -A nomangle -j ACCEPT \
-p `ipfilter_echoParam '$1' $TNL` \
-d `ipfilter_echoIpPort '$2' ' --dport $3' '$3' $TNL`
done
# Add the nomangle chain to the OUTPUT chain
# NOTE position this is inserted.
ipv4filter_delTie OUTPUT -j nomangle
$IPTBL -t mangle -I OUTPUT 1 -j nomangle
[ -z "$CLS_FAIRQ" ] && return 0
# Clear chain if it already exists
qt $IPTBL -t mangle -F fairq
# Create new chain
qt $IPTBL -t mangle -N fairq
# Populate chains
for CLS in $CLS_FAIRQ; do
$IPTBL -t mangle -A fairq -j MARK \
--set-mark `ipfilter_echoParam '$1' $CLS` \
-p `ipfilter_echoParam '$2' $CLS` \
`ipfilter_echoIpPort '-d $3' ' --dport $4' '$4' $CLS`
$IPTBL -t mangle -A fairq -j MARK \
--set-mark `ipfilter_echoParam '$1' $CLS` \
-p `ipfilter_echoParam '$2' $CLS` \
`ipfilter_echoIpPort '-s $3' ' --sport $4' '$4' $CLS`
done;
# Add fairq chain to OUTPUT and PREROUTING chains
ipv4filter_delTie OUTPUT -j fairq
$IPTBL -t mangle -I OUTPUT 2 -j fairq # NOTE postion this is inserted.
ipv4filter_delTie PREROUTING -j fairq
$IPTBL -t mangle -I PREROUTING 1 -j fairq
return 0
}
ipv4filter_exec () {
local RES
if ! ipv4filter_check; then
return 1
fi
local FN="$1"
shift
eval "case \"$FN\" in
$IPF4_FNS)
case \$1 in
-r|remove)
vb echo -n \"Removing IPv4 filter $FN...\"
;;
*)
vb echo -n \"Loading IPv4 filter $FN...\"
;;
esac
if ipf4_${FN} $*; then
echo \"done.\"
exit 0
fi
exit 1
;;
*)
echo \" `basename $0` ipfilter exec $IPF4_FNS\"
echo \" [chain p1 p2 ...]\"
exit 1
;;
esac"
return 0
}
ipv4filter_cmd () {
if [ "$KERN_VERSION" != "$TARGET_KERNEL1" \
-a "$KERN_VERSION" != "$TARGET_KERNEL2" \
-a "$KERN_VERSION" != "$TARGET_KERNEL3" ] ; then
echo
echo "IPv4 filters: kernel not version ${TARGET_KERNEL1}.x, ${TARGET_KERNEL2}.x, or ${TARGET_KERNEL3}.x."
if [ "$IPV4_FWDING_KERNEL" = "FILTER_ON" ]; then
# Keep the output pretty..
echo
fi
ipv4filter_kernfwd off
echo
return 1
fi
if ! [ -x $IPTBL ] ; then
echo
echo "IPv4 filters: $IPTBL not found."
echo
return 1
fi
case $1 in
load|reload|restart|reset)
if [ -z "$IPV4_CONFIGURE_SWITCH" ]; then
ipv4filter_iptbl_cfg $IPTBL_FILE
else
ipv4filter_compile_cfg "$IPFILTER_DEFS_COMPILED" \
"$IPV4_CONFIGURE_SWITCH"
fi
;;
usebackup)
local BKUP_NUM=1
[ -n "$2" ] && BKUP_NUM="$2"
if [ -z "$IPV4_CONFIGURE_SWITCH" ]; then
ipv4filter_iptbl_cfg "${IPTBL_FILE}.${BKUP_NUM}"
else
ipv4filter_compile_cfg -n \
"${IPFILTER_DEFS_COMPILED}.${BKUP_NUM}" \
"$IPV4_CONFIGURE_SWITCH"
fi
;;
save)
ipv4filter_iptbl_save
;;
fairq)
echo -n "Reloading IPv4 fairq filters..."
if ipv4filter_fairq; then
echo "done."
else
echo "netfilter kernel modules not loaded."
fi
;;
clear|flush)
ipv4filter_kernfwd off
vb echo -n "Flushing IPv4 filters..."
ipv4filter_clear
ipv4filter_fairq
vb echo "done."
;;
exec)
shift
ipv4filter_exec $*
;;
forward|fwd)
ipv4filter_kernfwd on yes
;;
noforward|nofwd)
ipv4filter_kernfwd off yes
;;
*)
echo "Usage: `basename $0` ipfilter load|clear|fairq|flush|fwd|nofwd|reload|save"
echo " usebackup [backup-number]"
echo " `basename $0` ipfilter exec $IPF4_FNS"
echo " [chain p1 p2 ...]"
exit 1
;;
esac
}
# IPv6 filters
ipv6filter_kernfwd () {
local OVERRIDE="$2"
if [ "$OVERRIDE" != "YES" -a "$OVERRIDE" != "Yes" \
-a "$OVERRIDE" != "yes" \
-a "$IPV6_FWDING_KERNEL" != "FILTER_ON" ]; then
return 0;
fi
case $1 in
on)
vb echo -n "Enabling IPv6 packet forwarding..."
echo "1" >$IPFWD_V6PROC \
&& vb echo "done."
;;
off)
vb echo -n "Disabling IPv6 packet forwarding..."
echo "0" >$IPFWD_V6PROC \
&& vb echo "done."
;;
*)
echo "AAARGGHH - wrong argument given to ipv6filter_kernfwd: $1"
exit 1
;;
esac
}
# Check and see if filtering and mangling are available
ipv6filter_check () {
local TBL MANGLE FILTER
MANGLE=0
FILTER=0
[ ! -f "$IPTBL_V6PROC" ] && return 1
for TBL in `cat $IPTBL_V6PROC`; do
case $TBL in
mangle)
MANGLE=1
;;
filter)
FILTER=1
;;
esac
done
if [ $MANGLE -ne 1 -a $FILTER -ne 1 ]; then
return 1
fi
return 0
}
# A function to flush the filters (for internal use)
ipv6filter_flush () {
local TBL
# Flush the IPV6 filters out, and user defined chains
[ ! -f $IPTBL_V6PROC ] && return 0
for TBL in `cat $IPTBL_V6PROC`; do
if [ "$TBL" = "$1" ]; then
continue
fi
$IP6TBL -t $TBL -F
$IP6TBL -t $TBL -X
done
return 0
}
ipv6filter_policy () {
local TBL
[ ! -f $IPTBL_V6PROC ] && return 0
for TBL in `cat $IPTBL_V6PROC`; do
if [ "$TBL" = "$2" ]; then
continue
fi
case $TBL in
mangle)
$IP6TBL -t $TBL -P PREROUTING $1
$IP6TBL -t $TBL -P OUTPUT $1
;;
filter)
$IP6TBL -t $TBL -P INPUT $1
$IP6TBL -t $TBL -P FORWARD $1
$IP6TBL -t $TBL -P OUTPUT $1
;;
nat)
$IP6TBL -t $TBL -P PREROUTING $1
$IP6TBL -t $TBL -P POSTROUTING $1
$IP6TBL -t $TBL -P OUTPUT $1
;;
esac
done
return 0
}
# function to set the filter default policies
ipv6filter_clear () {
ipv6filter_flush $1
ipv6filter_policy ACCEPT $1
return 0
}
# Selects basic filter type configuration function
ipv6filter_iptbl_cfg () {
if ! ipv6filter_check; then
echo
echo "IPv6 filters: netfilter kernel modules not loaded."
echo
return 1
fi
if [ ! -f $1 ] ; then
echo
echo "IPv6 filters: no $1 file."
echo
return 1
fi
echo -n "Loading IPv6 filters..."
if $IP6TBL_RESTORE < $1; then
ipv6filter_fairq
ipf6_laptopfw
vb echo "done."
ipv6filter_kernfwd on
else
return 1
fi
return 0
}
ipv6filter_compile_cfg () {
if ! ipv6filter_check; then
echo
echo "IPv6 filters: netfilter kernel modules not loaded."
echo
return 1
fi
local NO_COMPILE=0
if [ "$1" = "-n" ]; then
local NO_COMPILE=1
shift
fi
if ! qt type ipf6_${2} ; then
echo
echo "IPv6 filters: no $2 configure function."
echo
return 1
fi
# Compile IPv6 filters
if [ $NO_COMPILE -le 0 ]; then
netscript-compile -b "$BACKUP_LEVELS" || true
fi
if [ ! -f "$1" ]; then
echo
echo "IPv6 filters: no $1 file."
echo
return 1
fi
# Load fresh copy of file...
source "$1"
echo -n "Configuring IPv6 filters..."
if ipf6_${2}; then
ipv6filter_fairq
vb echo "done."
ipv6filter_kernfwd on
else
return 1
fi
return 0
}
ipv6filter_iptbl_save () {
local OLD_UMASK
if [ -n "$IPV6_CONFIGURE_SWITCH" ]; then
echo
echo "IPv6 filters: compile mode selected - can't save iptables state."
echo
return 1
fi
if ! ipv6filter_check; then
echo
echo "IPv6 filters: netfilter kernel modules not loaded."
echo
return 1
fi
echo -n "Saving IPv6 filters..."
backup_rotate "$IP6TBL_FILE" "$BACKUP_LEVELS"
OLD_UMASK=`umask`
umask 0277
if $IP6TBL_SAVE > $IP6TBL_FILE; then
umask $OLD_UMASK
chmod 0400 $IP6TBL_FILE
vb echo "done."
else
umask $OLD_UMASK
vb echo
return 1
fi
vb echo
return 0
}
ipv6filter_delTie () {
local CHAIN="$1"
shift
qt $IP6TBL -t mangle -D "$CHAIN" $*
qt $IP6TBL -t mangle -D "$CHAIN" -s ::/0 $*
qt $IP6TBL -t mangle -D "$CHAIN" -d ::/0 $*
qt $IP6TBL -t mangle -D "$CHAIN" -s ::/0 -d ::/0 $*
return 0
}
# A function to mark packets for classification
ipv6filter_fairq () {
local CLS
local TNL
if ! ipv6filter_check; then
return 1
fi
[ -z "$IPV6_MANGLE_OUTPUT_BYPASS" ] && [ -z "$IPV6_CLS_FAIRQ" ] \
&& return 0
qt $IP6TBL -t mangle -F nomangle
qt $IP6TBL -t mangle -N nomangle
# Accept IPv6 tunnel traffic - any changes on
# OUTPUT chain will cause rerouting, and Free S/WAN problems
for TNL in $IPV6_MANGLE_OUTPUT_BYPASS; do
$IP6TBL -t mangle -A nomangle -j ACCEPT \
-p `ipfilter_echoParam '$1' $TNL` \
-d `ipfilter_echoIpPort '$2' ' --dport $3' '$3' $TNL`
done
# Add the nomangle chain to the OUTPUT chain
# NOTE position this is inserted.
ipv6filter_delTie OUTPUT -j nomangle
$IP6TBL -t mangle -I OUTPUT 1 -j nomangle
[ -z "$IPV6_CLS_FAIRQ" ] && return 0
# Clear chain if it already exists
qt $IP6TBL -t mangle -F fairq
# Create new chain
qt $IP6TBL -t mangle -N fairq
# Populate chains
for CLS in $IPV6_CLS_FAIRQ; do
$IP6TBL -t mangle -A fairq -j MARK \
--set-mark `ipfilter_echoParam '$1' $CLS` \
-p `ipfilter_echoParam '$2' $CLS` \
`ipfilter_echoIpPort '-d $3' ' --dport $4' '$4' $CLS`
$IP6TBL -t mangle -A fairq -j MARK \
--set-mark `ipfilter_echoParam '$1' $CLS` \
-p `ipfilter_echoParam '$2' $CLS` \
`ipfilter_echoIpPort '-s $3' ' --sport $4' '$4' $CLS`
done;
# Add fairq chain to OUTPUT and PREROUTING chains
ipv6filter_delTie OUTPUT -j fairq
$IP6TBL -t mangle -I OUTPUT 2 -j fairq # NOTE postion this is inserted.
ipv6filter_delTie PREROUTING -j fairq
$IP6TBL -t mangle -I PREROUTING 1 -j fairq
return 0
}
ipv6filter_exec () {
local RES
if ! ipv6filter_check; then
return 1
fi
local FN="$1"
shift
eval "case \"$FN\" in
$IPF6_FNS)
case \$1 in
-r|remove)
vb echo -n \"Removing IPv6 filter $FN...\"
;;
*)
vb echo -n \"Loading IPv6 filter $FN...\"
;;
esac
if ipf6_${FN} $*; then
echo \"done.\"
exit 0
fi
exit 1
;;
*)
echo \" `basename $0` ip6filter exec $IPF6_FNS\"
echo \" [chain p1 p2 ...]\"
exit 1
;;
esac"
return 0
}
ipv6filter_cmd () {
if [ $IPV6_KRNL -lt 1 ]; then
return 0
fi
if [ "$KERN_VERSION" != "$TARGET_KERNEL1" \
-a "$KERN_VERSION" != "$TARGET_KERNEL2" \
-a "$KERN_VERSION" != "$TARGET_KERNEL3" ] ; then
echo
echo "IPv6 filters: kernel not version ${TARGET_KERNEL1}.x, ${TARGET_KERNEL2}.x, or ${TARGET_KERNEL3}.x."
if [ "$IPV6_FWDING_KERNEL" = "FILTER_ON" ]; then
# Keep the output pretty..
echo
fi
ipv6filter_kernfwd off
echo
return 1
fi
if ! [ -x $IP6TBL ] ; then
echo
echo "IPv6 filters: $IP6TBL not found."
echo
return 1
fi
case $1 in
load|reload|restart|reset)
if [ -z "$IPV6_CONFIGURE_SWITCH" ]; then
ipv6filter_iptbl_cfg $IP6TBL_FILE
else
ipv6filter_compile_cfg "$IPFILTER_DEFS_COMPILED" \
"$IPV6_CONFIGURE_SWITCH"
fi
;;
usebackup)
local BKUP_NUM=1
[ -n "$2" ] && BKUP_NUM="$2"
if [ -z "$IPV6_CONFIGURE_SWITCH" ]; then
ipv6filter_iptbl_cfg "${IP6TBL_FILE}.${BKUP_NUM}"
else
ipv6filter_compile_cfg -n \
"${IPFILTER_DEFS_COMPILED}.${BKUP_NUM}" \
"$IPV6_CONFIGURE_SWITCH"
fi
;;
save)
ipv6filter_iptbl_save
;;
fairq)
echo -n "Reloading IPv6 fairq filters..."
if ipv6filter_fairq; then
echo "done."
else
echo "netfilter IPv6 kernel modules not loaded."
fi
;;
clear|flush)
ipv6filter_kernfwd off
vb echo -n "Flushing IPv6 filters..."
ipv6filter_clear
ipv6filter_fairq
vb echo "done."
;;
exec)
shift
ipv6filter_exec $*
;;
forward|fwd)
ipv6filter_kernfwd on yes
;;
noforward|nofwd)
ipv6filter_kernfwd off yes
;;
*)
echo "Usage: `basename $0` ip6filter load|clear|fairq|flush|fwd|nofwd|reload|save"
echo " usebackup [backup-number]"
echo " `basename $0` ip6filter exec $IPF6_FNS"
echo " [chain p1 p2 ...]"
exit 1
;;
esac
}
##############################################################################
# Start and stop
##############################################################################
start () {
start_mod
start_auto_ipkrnlswch
if [ "$1" != "reload" ]; then
ipv4filter_cmd load
else
ipv4filter_fairq
fi
if [ $IPV6_KRNL -ge 1 ]; then
if [ "$1" != "reload" ]; then
ipv6filter_cmd load
else
ipv6filter_fairq
fi
fi
start_auto_if
} #END start ()
stop () {
iface_down all
vb echo -n "Disabling IPv4 packet forwarding..."
echo "0" >$IPFWD_V4PROC \
&& vb echo "done."
vb echo -n "Flushing IPv4 filters..."
ipv4filter_clear && vb echo "done."
if [ $IPV6_KRNL -ge 1 ]; then
vb echo -n "Disabling IPv6 packet forwarding..."
echo "0" >$IPFWD_V6PROC \
&& vb echo "done."
vb echo -n "Flushing IPv6 filters..."
ipv6filter_clear && vb echo "done."
fi
# Deal with modules do kernel printk stuff...
vb echo "Unloading networking modules..."
stop_mod && vb echo "Networking modules unloaded."
} #END stop ()
#############################################################################
# Debian compatibility hooks
#############################################################################
ifupdown_usage () {
echo "Usage: `basename $0` -a|$IFLIST" 1>&2
echo " Use the netscript command instead as it a lot better." 1>&2
exit 1
}
ifupdown () {
local OPTA
local OPTIND
OPTA=0
OPTIND=1
while getopts :ah F; do
case $F in
a) OPTA=1
;;
h)
ifupdown_usage
exit 1
;;
\?)
;;
esac
done
shift $(( $OPTIND - 1 ))
case "$RUNLVL" in
unknown|0|1|6)
# Do nothing
exit 0
;;
*)
if [ "`basename $0`" = "ifup" -a $OPTA -gt 0 ]; then
iface_up all > /dev/null
exit 0
elif [ "`basename $0`" = "ifdown" -a $OPTA -gt 0 ]; then
iface_down all > /dev/null
exit 0
fi
;;
esac
if [ $# -eq 1 ]; then
eval "case \"$*\" in
$IFLIST)
;;
*)
ifupdown_usage
exit 1
;;
esac"
case "`basename $0`" in
ifup)
iface_up $1 > /dev/null
exit 0
;;
ifdown)
iface_down $1 > /dev/null
exit 0
;;
esac
fi
ifupdown_usage
exit 1
}
#############################################################################
# Main - Down to business
#############################################################################
# Handle symlinked ifup and ifdown commands
if [ "`basename $0`" = "ifup" -o "`basename $0`" = "ifdown" ]; then
ifupdown $*
fi
case "$1" in
start) start ;;
stop) stop ;;
reload) start reload ;;
restart|force-reload)
$0 stop
sleep 1
$0 start
;;
ifup|ifreload)
shift
checkarg $*
iface_up $1
;;
ifdown)
shift
checkarg $*
iface_down $1
;;
ifqos)
shift
checkarg $*
iface_qos $1
;;
ifreset|ifrestart)
shift
checkarg $*
iface_reset $1
;;
compile)
shift
netscript-compile -b "$BACKUP_LEVELS" $*
RETVAL=$?
[ $RETVAL -ne 0 ] && exit $RETVAL
;;
ipfilter)
shift
if ! ipv4filter_cmd $*; then
exit 1
fi
;;
*)
if [ $IPV6_KRNL -ge 1 -a "$1" = "ip6filter" ]; then
shift
if ! ipv6filter_cmd $*; then
exit 1
fi
exit 0
fi
echo "Usage: `basename $0` start|stop|reload|restart"
echo " `basename $0` ifup|ifdown|ifqos|ifreload"
echo " ${SP} {$IFLIST}"
echo " `basename $0` compile [-fqh] [-b max-backup-level]"
echo "Usage: `basename $0` ipfilter load|clear|fairq|flush|fwd|nofwd|reload|save"
echo " usebackup [backup-number]"
echo " `basename $0` ipfilter exec $IPF4_FNS"
echo " [chain p1 p2 ...]"
if [ $IPV6_KRNL -ge 1 ]; then
echo "Usage: `basename $0` ip6filter load|clear|fairq|flush|fwd|nofwd|reload|save"
echo " usebackup [backup-number]"
echo " `basename $0` ip6filter exec $IPF6_FNS"
echo " [chain p1 p2 ...]"
fi
exit 1
;;
esac
exit 0
|