qos-scripts: Add IPv6 support

This adds IPv6 support to qos-scripts for both tc/qdisc and the
iptables classification rules.  The tc/qdisc part is accomplished
by removing "protocol ip" from the tc command line, causing the
rule to be applied to all protocols.  The iptables part is
accomplished by adding each rule using both iptables and ip6tables.

This patch is based on previous work by Ilkka Ollakka and
Dominique Martinet.

Signed-off-by: Michael Marley <michael@michaelmarley.com>

SVN-Revision: 48452

2 files changed, 64 insertions, 28 deletions

diff --git a/package/network/config/qos-scripts/files/usr/lib/qos/generate.sh b/package/network/config/qos-scripts/files/usr/lib/qos/generate.sh
index 3a0525de4d..285617c0d7 100755
--- a/package/network/config/qos-scripts/files/usr/lib/qos/generate.sh
+++ b/package/network/config/qos-scripts/files/usr/lib/qos/generate.sh
@@ -339,11 +339,11 @@ tc class add dev $dev parent 1: classid 1:1 hfsc sc rate ${rate}kbit ul rate ${r
 	if [ -n "$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"
+tc filter add dev $device parent 1: prio 10 u32 match u32 0 0 flowid 1:1 action mirred egress redirect dev ifb$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"
+tc filter add dev $device parent ffff: prio 1 u32 match u32 0 0 flowid 1:1 action connmark action mirred egress redirect dev ifb$ifbdev" "$N"
 	fi
 	add_insmod cls_fw
 	add_insmod sch_hfsc
@@ -400,17 +400,23 @@ start_cg() {
 	local pktrules
 	local sizerules
 	enum_classes "$cg"
-	add_rules iptrules "$ctrules" "iptables -t mangle -A qos_${cg}_ct"
+	for command in $iptables; do
+		add_rules iptrules "$ctrules" "$command -w -t mangle -A qos_${cg}_ct"
+	done
 	config_get classes "$cg" classes
 	for class in $classes; do
 		config_get mark "$class" classnr
 		config_get maxsize "$class" maxsize
 		[ -z "$maxsize" -o -z "$mark" ] || {
 			add_insmod xt_length
-			append pktrules "iptables -t mangle -A qos_${cg} -m mark --mark $mark/0x0f -m length --length $maxsize: -j MARK --set-mark 0/0xff" "$N"
+			for command in $iptables; do
+				append pktrules "$command -w -t mangle -A qos_${cg} -m mark --mark $mark/0x0f -m length --length $maxsize: -j MARK --set-mark 0/0xff" "$N"
+			done
 		}
 	done
-	add_rules pktrules "$rules" "iptables -t mangle -A qos_${cg}"
+	for command in $iptables; do
+		add_rules pktrules "$rules" "$command -w -t mangle -A qos_${cg}"
+	done
 	for iface in $INTERFACES; do
 		config_get classgroup "$iface" classgroup
 		config_get device "$iface" device
@@ -419,18 +425,40 @@ start_cg() {
 		config_get download "$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"
+		for command in $iptables; do
+			append up "$command -w -t mangle -A OUTPUT -o $device -j qos_${cg}" "$N"
+			append up "$command -w -t mangle -A FORWARD -o $device -j qos_${cg}" "$N"
+		done
 	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_${cg}_ct -j CONNMARK --save-mark --mask 0xff}
-iptables -t mangle -A qos_${cg} -j CONNMARK --restore-mark --mask 0x0f
-iptables -t mangle -A qos_${cg} -m mark --mark 0/0x0f -j qos_${cg}_ct
+EOF
+  
+for command in $iptables; do
+	cat <<EOF
+	$command -w -t mangle -N qos_${cg} 
+	$command -w -t mangle -N qos_${cg}_ct
+EOF
+done
+cat <<EOF
+	${iptrules:+${iptrules}${N}}
+EOF
+for command in $iptables; do
+	cat <<EOF
+	$command -w -t mangle -A qos_${cg}_ct -j CONNMARK --save-mark --mask 0xff
+	$command -w -t mangle -A qos_${cg} -j CONNMARK --restore-mark --mask 0x0f
+	$command -w -t mangle -A qos_${cg} -m mark --mark 0/0x0f -j qos_${cg}_ct
+EOF
+done
+cat <<EOF
 $pktrules
-${iptrules:+${iptrules}${N}iptables -t mangle -A qos_${cg} -j CONNMARK --save-mark --mask 0xff}
+EOF
+for command in $iptables; do
+	cat <<EOF
+	$command -w -t mangle -A qos_${cg} -j CONNMARK --save-mark --mask 0xff
+EOF
+done
+cat <<EOF
 $up$N${down:+${down}$N}
 EOF
 	unset INSMOD
@@ -450,20 +478,22 @@ stop_firewall() {
 	# 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'
+	for command in $iptables; do
+		$command -w -t mangle -S |
+			# Find rules for the qos_* chains
+			grep -E '(^-N qos_|-j qos_)' |
+			# Exclude rules in qos_* chains (inter-qos_* refs)
+			grep -v '^-A qos_' |
+			# Replace -N with -X and hold, with -F and print
+			# Replace -A with -D
+			# Print held lines at the end (note leading newline)
+			sed -e '/^-N/{s/^-N/-X/;H;s/^-X/-F/}' \
+				-e 's/^-A/-D/' \
+				-e '${p;g}' |
+			# Make into proper iptables calls
+			# Note:  awkward in previous call due to hold space usage
+			sed -n -e "s/^./${command} -w -t mangle &/p"
+	done
 }
 
 C="0"
@@ -478,6 +508,12 @@ for iface in $INTERFACES; do
 	export C="$(($C + 1))"
 done
 
+[ -x /usr/sbin/ip6tables ] && {
+	iptables="ip6tables iptables"
+} || {
+	iptables="iptables"
+}
+
 case "$1" in
 	all)
 		start_interfaces "$C"
diff --git a/package/network/config/qos-scripts/files/usr/lib/qos/tcrules.awk b/package/network/config/qos-scripts/files/usr/lib/qos/tcrules.awk
index 12f94a67f1..21df391054 100644
--- a/package/network/config/qos-scripts/files/usr/lib/qos/tcrules.awk
+++ b/package/network/config/qos-scripts/files/usr/lib/qos/tcrules.awk
@@ -84,7 +84,7 @@ END {
 
 	# filter rule
 	for (i = 1; i <= n; i++) {
-		filter_cmd = "tc filter add dev "device" parent 1: prio %d protocol ip handle %s fw flowid 1:%d0\n";
+		filter_cmd = "tc filter add dev "device" parent 1: prio %d handle %s fw flowid 1:%d0\n";
 		if (direction == "up") {
 			filter_1 = sprintf("0x%x0/0xf0", class[i])
 			filter_2 = sprintf("0x0%x/0x0f", class[i])