235 lines
10 KiB
Plaintext
235 lines
10 KiB
Plaintext
################################################################################
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# simple.qos (Cero3 Shaper)
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#
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# Abstract:
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# This is a three band fq_codel and ipv6 enabled shaping script for Ethernet
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# gateways. Compared to the complexity that debloat had become this cleanly
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# shows a means of going from diffserv marking to prioritization using the
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# current tools ip(6)tables and tc. We should note that the complexity of
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# debloat exists for a reason, and it is expected that script is run first to
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# setup various other parameters such as BQL and ethtool.
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#
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# (Assume the debloat script has setup the other interfaces.)
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#
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# Notes:
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# This does the right thing with ipv6 traffic. It also tries to leverage
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# diffserv to some sane extent. In particular, the 'priority' queue is limited
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# to 33% of the total, so EF, and IMM traffic cannot starve other types. The
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# rfc suggested 30%. 30% is probably a lot in today's world.
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#
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# References:
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# This alternate shaper attempts to go for 1/u performance in a clever way
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# http://git.coverfire.com/?p=linux-qos-scripts.git;a=blob;f=src-3tos.sh;hb=HEAD
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#
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################################################################################
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License version 2 as
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# published by the Free Software Foundation.
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#
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# Copyright (C) 2012-2016
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# Michael D. Taht, Toke Høiland-Jørgensen, Sebastian Moeller
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#
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################################################################################
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. ${SQM_LIB_DIR}/defaults.sh
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################################################################################
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ipt_setup() {
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ipt -t mangle -N QOS_MARK_${IFACE}
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case $QDISC in
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cake*)
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sqm_debug "cake does all the diffserv work - no need for iptables rules"
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;;
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*)
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ipt -t mangle -A QOS_MARK_${IFACE} -j MARK --set-mark 0x2/${IPT_MASK}
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# You can go further with classification but...
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ipt -t mangle -A QOS_MARK_${IFACE} -m dscp --dscp-class CS1 -j MARK --set-mark 0x3/${IPT_MASK}
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ipt -t mangle -A QOS_MARK_${IFACE} -m dscp --dscp-class CS6 -j MARK --set-mark 0x1/${IPT_MASK}
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ipt -t mangle -A QOS_MARK_${IFACE} -m dscp --dscp-class EF -j MARK --set-mark 0x1/${IPT_MASK}
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ipt -t mangle -A QOS_MARK_${IFACE} -m dscp --dscp-class AF42 -j MARK --set-mark 0x1/${IPT_MASK}
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ipt -t mangle -A QOS_MARK_${IFACE} -m tos --tos Minimize-Delay -j MARK --set-mark 0x1/${IPT_MASK}
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;;
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esac
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# Turn it on. Preserve classification if already performed
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#
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#sm: is it correct to do this in $IFACE? Should ingress not be on $DEV? since HTB acts on $DEV?
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#
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# ZERO also does not work on $DEV (that is the IFB will still see the
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# incoming ToS bits whether we squash or not)
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#
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# ZERO is still useful to protect internal machines...
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if [ "$ZERO_DSCP_INGRESS" = "1" ]; then
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sqm_debug "Squashing differentiated services code points (DSCP) from ingress."
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ipt -t mangle -I PREROUTING -i $IFACE -m dscp ! --dscp 0 -j DSCP --set-dscp-class be
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else
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sqm_debug "Keeping differentiated services code points (DSCP) from ingress."
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ipt -t mangle -A PREROUTING -i $IFACE -m mark --mark 0x00/${IPT_MASK} -g QOS_MARK_${IFACE}
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fi
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ipt -t mangle -A POSTROUTING -o $IFACE -m mark --mark 0x00/${IPT_MASK} -g QOS_MARK_${IFACE}
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# The Syn optimization was nice but fq_codel does it for us
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# ipt -t mangle -A PREROUTING -i s+ -p tcp -m tcp --tcp-flags SYN,RST,ACK SYN -j MARK --set-mark 0x01
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# Not sure if this will work. Encapsulation is a problem period
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ipt -t mangle -I PREROUTING -i vtun+ -p tcp -j MARK --set-mark 0x2/${IPT_MASK} # tcp tunnels need ordering
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# Emanating from router, do a little more optimization
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# but don't bother with it too much.
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ipt -t mangle -A OUTPUT -p udp -m multiport --ports 123,53 -j DSCP --set-dscp-class AF42
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#Not clear if the second line is needed
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#ipt -t mangle -A OUTPUT -o $IFACE -g QOS_MARK_${IFACE}
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}
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cake_egress()
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{
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$TC qdisc add dev $IFACE root `get_stab_string` $QDISC bandwidth ${CEIL}kbit `get_cake_lla_string` ${EQDISC_OPTS}
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}
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egress() {
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CEIL=${UPLINK}
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PRIO_RATE=`expr $CEIL / 3` # Ceiling for prioirty
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BE_RATE=`expr $CEIL / 6` # Min for best effort
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BK_RATE=`expr $CEIL / 6` # Min for background
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BE_CEIL=`expr $CEIL - 16` # A little slop at the top
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LQ="quantum `get_htb_quantum $IFACE $CEIL ${ESHAPER_QUANTUM_DUR_US}`"
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BURST="`get_htb_burst $IFACE $CEIL ${ESHAPER_BURST_DUR_US}`"
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SILENT=1 $TC qdisc del dev $IFACE root
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case $QDISC in
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cake*) cake_egress; return;;
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esac
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$TC qdisc add dev $IFACE root handle 1: `get_stab_string` htb default 12
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$TC class add dev $IFACE parent 1: classid 1:1 htb $LQ rate ${CEIL}kbit ceil ${CEIL}kbit $BURST `get_htb_adsll_string`
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$TC class add dev $IFACE parent 1:1 classid 1:11 htb $LQ rate 128kbit ceil ${PRIO_RATE}kbit prio 1 `get_htb_adsll_string`
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$TC class add dev $IFACE parent 1:1 classid 1:12 htb $LQ rate ${BE_RATE}kbit ceil ${BE_CEIL}kbit $BURST prio 2 `get_htb_adsll_string`
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$TC class add dev $IFACE parent 1:1 classid 1:13 htb $LQ rate ${BK_RATE}kbit ceil ${BE_CEIL}kbit $BURST prio 3 `get_htb_adsll_string`
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$TC qdisc add dev $IFACE parent 1:11 handle 110: $QDISC \
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`get_limit ${ELIMIT}` `get_target "${ETARGET}" ${UPLINK}` `get_ecn ${EECN}` `get_quantum 300` `get_flows ${PRIO_RATE}` ${EQDISC_OPTS}
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$TC qdisc add dev $IFACE parent 1:12 handle 120: $QDISC \
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`get_limit ${ELIMIT}` `get_target "${ETARGET}" ${UPLINK}` `get_ecn ${EECN}` `get_quantum 300` `get_flows ${BE_RATE}` ${EQDISC_OPTS}
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$TC qdisc add dev $IFACE parent 1:13 handle 130: $QDISC \
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`get_limit ${ELIMIT}` `get_target "${ETARGET}" ${UPLINK}` `get_ecn ${EECN}` `get_quantum 300` `get_flows ${BK_RATE}` ${EQDISC_OPTS}
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# Need a catchall rule
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$TC filter add dev $IFACE parent 1:0 protocol all prio 999 u32 \
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match ip protocol 0 0x00 flowid 1:12
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# FIXME should probably change the filter here to do pre-nat
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$TC filter add dev $IFACE parent 1:0 protocol ip prio 1 handle 1/${IPT_MASK} fw classid 1:11
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$TC filter add dev $IFACE parent 1:0 protocol ip prio 2 handle 2/${IPT_MASK} fw classid 1:12
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$TC filter add dev $IFACE parent 1:0 protocol ip prio 3 handle 3/${IPT_MASK} fw classid 1:13
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# ipv6 support. Note that the handle indicates the fw mark bucket that is looked for
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$TC filter add dev $IFACE parent 1:0 protocol ipv6 prio 4 handle 1/${IPT_MASK} fw classid 1:11
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$TC filter add dev $IFACE parent 1:0 protocol ipv6 prio 5 handle 2/${IPT_MASK} fw classid 1:12
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$TC filter add dev $IFACE parent 1:0 protocol ipv6 prio 6 handle 3/${IPT_MASK} fw classid 1:13
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# Arp traffic
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$TC filter add dev $IFACE parent 1:0 protocol arp prio 7 handle 1/${IPT_MASK} fw classid 1:11
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# ICMP traffic - Don't impress your friends. Deoptimize to manage ping floods
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# better instead
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$TC filter add dev $IFACE parent 1:0 protocol ip prio 8 \
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u32 match ip protocol 1 0xff flowid 1:13
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$TC filter add dev $IFACE parent 1:0 protocol ipv6 prio 9 \
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u32 match ip protocol 1 0xff flowid 1:13
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}
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cake_ingress()
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{
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CAKEARGS=
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[ "$IGNORE_DSCP_INGRESS" = "1" ] && CAKEARGS="$CAKEARGS besteffort"
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$TC qdisc add dev $DEV root `get_stab_string` $QDISC bandwidth ${DOWNLINK}kbit \
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$CAKEARGS `get_cake_lla_string` ${IQDISC_OPTS}
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$IP link set dev $DEV up
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# redirect all IP packets arriving in $IFACE to $DEV
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$TC filter add dev $IFACE parent ffff: protocol all prio 10 u32 \
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match u32 0 0 flowid 1:1 action mirred egress redirect dev $DEV
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}
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ingress() {
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CEIL=$DOWNLINK
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PRIO_RATE=`expr $CEIL / 3` # Ceiling for prioirty
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BE_RATE=`expr $CEIL / 6` # Min for best effort
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BK_RATE=`expr $CEIL / 6` # Min for background
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BE_CEIL=`expr $CEIL - 16` # A little slop at the top
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LQ="quantum `get_htb_quantum $IFACE $CEIL ${ISHAPER_QUANTUM_DUR_US}`"
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BURST="`get_htb_burst $IFACE $CEIL ${ISHAPER_BURST_DUR_US}`"
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SILENT=1 $TC qdisc del dev $IFACE handle ffff: ingress
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$TC qdisc add dev $IFACE handle ffff: ingress
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SILENT=1 $TC qdisc del dev $DEV root
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case $QDISC in
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cake*) cake_ingress; return ;;
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esac
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if [ "$IGNORE_DSCP_INGRESS" = "1" ]; then
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sqm_debug "Do not perform DSCP based filtering on ingress. (1-tier classification)"
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$TC qdisc add dev $DEV root handle 1: `get_stab_string` htb default 10
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$TC class add dev $DEV parent 1: classid 1:1 htb $LQ rate ${DOWNLINK}kbit ceil ${DOWNLINK}kbit $BURST `get_htb_adsll_string`
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$TC class add dev $DEV parent 1:1 classid 1:10 htb $LQ rate ${DOWNLINK}kbit ceil ${DOWNLINK}kbit $BURST prio 0 `get_htb_adsll_string`
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$TC qdisc add dev $DEV parent 1:10 handle 110: $QDISC \
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`get_limit ${ILIMIT}` `get_target "${ITARGET}" ${DOWNLINK}` `get_ecn ${IECN}` `get_flows ${DOWNLINK}` ${IQDISC_OPTS}
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else
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sqm_debug "Perform DSCP based filtering on ingress. (3-tier classification)"
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$TC qdisc add dev $DEV root handle 1: `get_stab_string` htb default 12
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$TC class add dev $DEV parent 1: classid 1:1 htb $LQ rate ${CEIL}kbit ceil ${CEIL}kbit $BURST `get_htb_adsll_string`
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$TC class add dev $DEV parent 1:1 classid 1:11 htb $LQ rate 32kbit ceil ${PRIO_RATE}kbit prio 1 `get_htb_adsll_string`
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$TC class add dev $DEV parent 1:1 classid 1:12 htb $LQ rate ${BE_RATE}kbit ceil ${BE_CEIL}kbit $BURST prio 2 `get_htb_adsll_string`
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$TC class add dev $DEV parent 1:1 classid 1:13 htb $LQ rate ${BK_RATE}kbit ceil ${BE_CEIL}kbit $BURST prio 3 `get_htb_adsll_string`
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$TC qdisc add dev $DEV parent 1:11 handle 110: $QDISC \
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`get_limit ${ILIMIT}` `get_target "${ITARGET}" ${DOWNLINK}` `get_ecn ${IECN}` `get_quantum 500` `get_flows ${PRIO_RATE}` ${IQDISC_OPTS}
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$TC qdisc add dev $DEV parent 1:12 handle 120: $QDISC \
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`get_limit ${ILIMIT}` `get_target "${ITARGET}" ${DOWNLINK}` `get_ecn ${IECN}` `get_quantum 1500` `get_flows ${BE_RATE}` ${IQDISC_OPTS}
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$TC qdisc add dev $DEV parent 1:13 handle 130: $QDISC \
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`get_limit ${ILIMIT}` `get_target "${ITARGET}" ${DOWNLINK}` `get_ecn ${IECN}` `get_quantum 300` `get_flows ${BK_RATE}` ${IQDISC_OPTS}
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diffserv $DEV
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fi
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$IP link set dev $DEV up
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# redirect all IP packets arriving in $IFACE to $DEV
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$TC filter add dev $IFACE parent ffff: protocol all prio 10 u32 \
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match u32 0 0 flowid 1:1 action mirred egress redirect dev $DEV
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}
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sqm_prepare_script() {
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do_modules
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verify_qdisc "htb" || return 1
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ipt_setup
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}
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