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openwrt-xburst/package/qos-scripts/files/usr/lib/qos/generate.sh
jow f6c379666d Add QoS firewall stop script generation
To prevent code duplication for clearing QoS firewall rules, support
"firewall stop" arguments to generate.sh to generate the necessary
script commands.  Make use of this from qos-stop.

Signed-off-by: Kevin Locke <klocke@digitalenginesoftware.com>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@28623 3c298f89-4303-0410-b956-a3cf2f4a3e73
2011-10-27 12:39:19 +00:00

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#!/bin/sh
[ -e /etc/functions.sh ] && . /etc/functions.sh || . ./functions.sh
[ -x /sbin/modprobe ] && {
insmod="modprobe"
rmmod="$insmod -r"
} || {
insmod="insmod"
rmmod="rmmod"
}
add_insmod() {
eval "export isset=\${insmod_$1}"
case "$isset" in
1) ;;
*) {
[ "$2" ] && append INSMOD "$rmmod $1 >&- 2>&-" "$N"
append INSMOD "$insmod $* >&- 2>&-" "$N"; export insmod_$1=1
};;
esac
}
[ -e /etc/config/network ] && {
# only try to parse network config on openwrt
find_ifname() {(
reset_cb
include /lib/network
scan_interfaces
config_get "$1" ifname
)}
} || {
find_ifname() {
echo "Interface not found."
exit 1
}
}
parse_matching_rule() {
local var="$1"
local section="$2"
local options="$3"
local prefix="$4"
local suffix="$5"
local proto="$6"
local mport=""
local ports=""
append "$var" "$prefix" "$N"
for option in $options; do
case "$option" in
proto) config_get value "$section" proto; proto="${proto:-$value}";;
esac
done
config_get type "$section" TYPE
case "$type" in
classify) unset pkt; append "$var" "-m mark --mark 0";;
default) pkt=1; append "$var" "-m mark --mark 0";;
reclassify) pkt=1;;
esac
append "$var" "${proto:+-p $proto}"
for option in $options; do
config_get value "$section" "$option"
case "$pkt:$option" in
*:srchost)
append "$var" "-s $value"
;;
*:dsthost)
append "$var" "-d $value"
;;
*:layer7)
add_insmod ipt_layer7
add_insmod xt_layer7
append "$var" "-m layer7 --l7proto $value${pkt:+ --l7pkt}"
;;
*:ports|*:srcports|*:dstports)
value="$(echo "$value" | sed -e 's,-,:,g')"
lproto=${lproto:-tcp}
case "$proto" in
""|tcp|udp) append "$var" "-m ${proto:-tcp -p tcp} -m multiport";;
*) unset "$var"; return 0;;
esac
case "$option" in
ports)
config_set "$section" srcports ""
config_set "$section" dstports ""
config_set "$section" portrange ""
append "$var" "--ports $value"
;;
srcports)
config_set "$section" ports ""
config_set "$section" dstports ""
config_set "$section" portrange ""
append "$var" "--sports $value"
;;
dstports)
config_set "$section" ports ""
config_set "$section" srcports ""
config_set "$section" portrange ""
append "$var" "--dports $value"
;;
esac
ports=1
;;
*:portrange)
config_set "$section" ports ""
config_set "$section" srcports ""
config_set "$section" dstports ""
value="$(echo "$value" | sed -e 's,-,:,g')"
case "$proto" in
""|tcp|udp) append "$var" "-m ${proto:-tcp -p tcp} --sport $value --dport $value";;
*) unset "$var"; return 0;;
esac
ports=1
;;
*:connbytes)
value="$(echo "$value" | sed -e 's,-,:,g')"
add_insmod ipt_connbytes
append "$var" "-m connbytes --connbytes $value --connbytes-dir both --connbytes-mode bytes"
;;
*:tos)
add_insmod ipt_tos
case "$value" in
!*) append "$var" "-m tos ! --tos $value";;
*) append "$var" "-m tos --tos $value"
esac
;;
*:dscp)
add_insmod ipt_dscp
dscp_option="--dscp"
[ -z "${value%%[EBCA]*}" ] && dscp_option="--dscp-class"
case "$value" in
!*) append "$var" "-m dscp ! $dscp_option $value";;
*) append "$var" "-m dscp $dscp_option $value"
esac
;;
*:direction)
value="$(echo "$value" | sed -e 's,-,:,g')"
if [ "$value" = "out" ]; then
append "$var" "-o $device"
elif [ "$value" = "in" ]; then
append "$var" "-i $device"
fi
;;
1:pktsize)
value="$(echo "$value" | sed -e 's,-,:,g')"
add_insmod ipt_length
append "$var" "-m length --length $value"
;;
1:limit)
add_insmod ipt_limit
append "$var" "-m limit --limit $value"
;;
1:tcpflags)
case "$proto" in
tcp) append "$var" "-m tcp --tcp-flags ALL $value";;
*) unset $var; return 0;;
esac
;;
1:mark)
config_get class "${value##!}" classnr
[ -z "$class" ] && continue;
case "$value" in
!*) append "$var" "-m mark ! --mark $class";;
*) append "$var" "-m mark --mark $class";;
esac
;;
1:TOS)
add_insmod ipt_TOS
config_get TOS "$rule" 'TOS'
suffix="-j TOS --set-tos "${TOS:-"Normal-Service"}
;;
1:DSCP)
add_insmod ipt_DSCP
config_get DSCP "$rule" 'DSCP'
[ -z "${DSCP%%[EBCA]*}" ] && set_value="--set-dscp-class $DSCP" \
|| set_value="--set-dscp $DSCP"
suffix="-j DSCP $set_value"
;;
esac
done
append "$var" "$suffix"
case "$ports:$proto" in
1:) parse_matching_rule "$var" "$section" "$options" "$prefix" "$suffix" "udp";;
esac
}
config_cb() {
option_cb() {
return 0
}
# Section start
case "$1" in
interface)
config_set "$2" "classgroup" "Default"
config_set "$2" "upload" "128"
;;
classify|default|reclassify)
option_cb() {
append options "$1"
}
;;
esac
# Section end
config_get TYPE "$CONFIG_SECTION" TYPE
case "$TYPE" in
interface)
config_get_bool enabled "$CONFIG_SECTION" enabled 1
[ 1 -eq "$enabled" ] || return 0
config_get classgroup "$CONFIG_SECTION" classgroup
config_set "$CONFIG_SECTION" ifbdev "$C"
C=$(($C+1))
append INTERFACES "$CONFIG_SECTION"
config_set "$classgroup" enabled 1
config_get device "$CONFIG_SECTION" device
[ -z "$device" ] && {
device="$(find_ifname ${CONFIG_SECTION})"
config_set "$CONFIG_SECTION" device "${device:-eth0}"
}
;;
classgroup) append CG "$CONFIG_SECTION";;
classify|default|reclassify)
case "$TYPE" in
classify) var="ctrules";;
*) var="rules";;
esac
config_get target "$CONFIG_SECTION" target
config_set "$CONFIG_SECTION" options "$options"
append "$var" "$CONFIG_SECTION"
unset options
;;
esac
}
enum_classes() {
local c="0"
config_get classes "$1" classes
config_get default "$1" default
for class in $classes; do
c="$(($c + 1))"
config_set "${class}" classnr $c
case "$class" in
$default) class_default=$c;;
esac
done
class_default="${class_default:-$c}"
}
cls_var() {
local varname="$1"
local class="$2"
local name="$3"
local type="$4"
local default="$5"
local tmp tmp1 tmp2
config_get tmp1 "$class" "$name"
config_get tmp2 "${class}_${type}" "$name"
tmp="${tmp2:-$tmp1}"
tmp="${tmp:-$tmp2}"
export ${varname}="${tmp:-$default}"
}
tcrules() {
dir=/usr/lib/qos
[ -e $dir/tcrules.awk ] || dir=.
echo "$cstr" | awk \
-v device="$dev" \
-v linespeed="$rate" \
-f $dir/tcrules.awk
}
start_interface() {
local iface="$1"
local num_ifb="$2"
config_get device "$iface" device
config_get_bool enabled "$iface" enabled 1
[ -z "$device" -o 1 -ne "$enabled" ] && {
return 1
}
config_get upload "$iface" upload
config_get_bool halfduplex "$iface" halfduplex
config_get download "$iface" download
config_get classgroup "$iface" classgroup
config_get_bool overhead "$iface" overhead 0
download="${download:-${halfduplex:+$upload}}"
enum_classes "$classgroup"
for dir in ${halfduplex:-up} ${download:+down}; do
case "$dir" in
up)
[ "$overhead" = 1 ] && upload=$(($upload * 98 / 100 - (15 * 128 / $upload)))
dev="$device"
rate="$upload"
dl_mode=""
prefix="cls"
;;
down)
[ "$(ls -d /proc/sys/net/ipv4/conf/ifb* 2>&- | wc -l)" -ne "$num_ifb" ] && add_insmod ifb numifbs="$num_ifb"
config_get ifbdev "$iface" ifbdev
[ "$overhead" = 1 ] && download=$(($download * 98 / 100 - (80 * 1024 / $download)))
dev="ifb$ifbdev"
rate="$download"
dl_mode=1
prefix="d_cls"
;;
*) continue;;
esac
cstr=
for class in $classes; do
cls_var pktsize "$class" packetsize $dir 1500
cls_var pktdelay "$class" packetdelay $dir 0
cls_var maxrate "$class" limitrate $dir 100
cls_var prio "$class" priority $dir 1
cls_var avgrate "$class" avgrate $dir 0
cls_var qdisc "$class" qdisc $dir ""
cls_var filter "$class" filter $dir ""
config_get classnr "$class" classnr
append cstr "$classnr:$prio:$avgrate:$pktsize:$pktdelay:$maxrate:$qdisc:$filter" "$N"
done
append ${prefix}q "$(tcrules)" "$N"
export dev_${dir}="ifconfig $dev up txqueuelen 5 >&- 2>&-
tc qdisc del dev $dev root >&- 2>&-
tc qdisc add dev $dev root handle 1: hfsc default ${class_default}0
tc class add dev $dev parent 1: classid 1:1 hfsc sc rate ${rate}kbit ul rate ${rate}kbit"
done
[ -n "$download" ] && {
add_insmod cls_u32
add_insmod em_u32
add_insmod act_connmark
add_insmod act_mirred
add_insmod sch_ingress
}
if [ -n "$halfduplex" ]; then
export dev_up="tc qdisc del dev $device root >&- 2>&-
tc qdisc add dev $device root handle 1: hfsc
tc filter add dev $device parent 1: protocol ip prio 10 u32 match u32 0 0 flowid 1:1 action mirred egress redirect dev ifb$ifbdev"
elif [ -n "$download" ]; then
append dev_${dir} "tc qdisc del dev $device ingress >&- 2>&-
tc qdisc add dev $device ingress
tc filter add dev $device parent ffff: protocol ip prio 1 u32 match u32 0 0 flowid 1:1 action connmark action mirred egress redirect dev ifb$ifbdev" "$N"
fi
add_insmod cls_fw
add_insmod sch_hfsc
add_insmod sch_sfq
add_insmod sch_red
cat <<EOF
${INSMOD:+$INSMOD$N}${dev_up:+$dev_up
$clsq
}${ifbdev:+$dev_down
$d_clsq
$d_clsl
$d_clsf
}
EOF
unset INSMOD clsq clsf clsl d_clsq d_clsl d_clsf dev_up dev_down
}
start_interfaces() {
local C="$1"
for iface in $INTERFACES; do
start_interface "$iface" "$C"
done
}
add_rules() {
local var="$1"
local rules="$2"
local prefix="$3"
for rule in $rules; do
unset iptrule
config_get target "$rule" target
config_get target "$target" classnr
config_get options "$rule" options
## If we want to override the TOS field, let's clear the DSCP field first.
[ ! -z "$(echo $options | grep 'TOS')" ] && {
s_options=${options%%TOS}
add_insmod ipt_DSCP
parse_matching_rule iptrule "$rule" "$s_options" "$prefix" "-j DSCP --set-dscp 0"
append "$var" "$iptrule" "$N"
unset iptrule
}
parse_matching_rule iptrule "$rule" "$options" "$prefix" "-j MARK --set-mark $target"
append "$var" "$iptrule" "$N"
done
}
start_cg() {
local cg="$1"
local iptrules
local pktrules
local sizerules
enum_classes "$cg"
add_rules iptrules "$ctrules" "iptables -t mangle -A qos_${cg}_ct"
config_get classes "$cg" classes
for class in $classes; do
config_get mark "$class" classnr
config_get maxsize "$class" maxsize
[ -z "$maxsize" -o -z "$mark" ] || {
add_insmod ipt_length
append pktrules "iptables -t mangle -A qos_${cg} -m mark --mark $mark -m length --length $maxsize: -j MARK --set-mark 0" "$N"
}
done
add_rules pktrules "$rules" "iptables -t mangle -A qos_${cg}"
for iface in $INTERFACES; do
config_get classgroup "$iface" classgroup
config_get device "$iface" device
config_get ifbdev "$iface" ifbdev
config_get upload "$iface" upload
config_get download "$iface" download
config_get halfduplex "$iface" halfduplex
download="${download:-${halfduplex:+$upload}}"
append up "iptables -t mangle -A OUTPUT -o $device -j qos_${cg}" "$N"
append up "iptables -t mangle -A FORWARD -o $device -j qos_${cg}" "$N"
done
cat <<EOF
$INSMOD
iptables -t mangle -N qos_${cg} >&- 2>&-
iptables -t mangle -N qos_${cg}_ct >&- 2>&-
${iptrules:+${iptrules}${N}iptables -t mangle -A qos_${cg}_ct -j CONNMARK --save-mark}
iptables -t mangle -A qos_${cg} -j CONNMARK --restore-mark
iptables -t mangle -A qos_${cg} -m mark --mark 0 -j qos_${cg}_ct
$pktrules
$up$N${down:+${down}$N}
EOF
unset INSMOD
}
start_firewall() {
add_insmod ipt_multiport
add_insmod ipt_CONNMARK
stop_firewall
for group in $CG; do
start_cg $group
done
}
stop_firewall() {
# Builds up a list of iptables commands to flush the qos_* chains,
# remove rules referring to them, then delete them
# Print rules in the mangle table, like iptables-save
iptables -t mangle -S |
# Find rules for the qos_* chains
grep '^-N qos_\|-j qos_' |
# Exclude rules in qos_* chains (inter-qos_* refs)
grep -v '^-A qos_' |
# Replace -N with -X and hold, with -F and print
# Replace -A with -D
# Print held lines at the end (note leading newline)
sed -e '/^-N/{s/^-N/-X/;H;s/^-X/-F/}' \
-e 's/^-A/-D/' \
-e '${p;g}' |
# Make into proper iptables calls
# Note: awkward in previous call due to hold space usage
sed -n -e 's/^./iptables -t mangle &/p'
}
C="0"
INTERFACES=""
[ -e ./qos.conf ] && {
. ./qos.conf
config_cb
} || config_load qos
C="0"
for iface in $INTERFACES; do
export C="$(($C + 1))"
done
case "$1" in
all)
start_interfaces "$C"
start_firewall
;;
interface)
start_interface "$2" "$C"
;;
interfaces)
start_interfaces
;;
firewall)
case "$2" in
stop)
stop_firewall
;;
start|"")
start_firewall
;;
esac
;;
esac