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98 lines
3.4 KiB
98 lines
3.4 KiB
#!/bin/sh
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# Cero3 Simple Shaper
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# A 1 bin tc_codel and ipv6 enabled shaping script for
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# ethernet gateways. This is nearly the simplest possible
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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) 2012-5 Michael D. Taht, Toke Høiland-Jørgensen, Sebastian Moeller
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. /usr/lib/sqm/functions.sh
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sqm_logger "Starting simplest.qos"
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egress() {
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LQ="quantum `get_mtu $IFACE ${UPLINK}`"
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$TC qdisc del dev $IFACE root 2>/dev/null
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case $QDISC in
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cake*)
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$TC qdisc add dev $IFACE root `get_stab_string` cake bandwidth ${UPLINK}kbit besteffort `get_cake_lla_string` ${EQDISC_OPTS}
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;;
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*)
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$TC qdisc add dev $IFACE root handle 1: `get_stab_string` htb default 10
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$TC class add dev $IFACE parent 1: classid 1:1 htb $LQ rate ${UPLINK}kbit ceil ${UPLINK}kbit `get_htb_adsll_string`
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$TC class add dev $IFACE parent 1:1 classid 1:10 htb $LQ rate ${UPLINK}kbit ceil ${UPLINK}kbit prio 0 `get_htb_adsll_string`
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$TC qdisc add dev $IFACE parent 1:10 handle 110: $QDISC `get_limit ${ELIMIT}` `get_target "${ETARGET}" ${UPLINK}` `get_ecn ${EECN}` `get_flows ${UPLINK}` ${EQDISC_OPTS}
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;;
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esac
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}
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ingress() {
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sqm_logger "ingress"
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$TC qdisc del dev $IFACE handle ffff: ingress 2>/dev/null
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$TC qdisc add dev $IFACE handle ffff: ingress
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LQ="quantum `get_mtu $IFACE ${DOWNLINK}`"
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$TC qdisc del dev $DEV root 2>/dev/null
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case $QDISC in
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cake*)
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$TC qdisc add dev $DEV root `get_stab_string` cake bandwidth ${DOWNLINK}kbit besteffort `get_cake_lla_string` ${IQDISC_OPTS}
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;;
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*)
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$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 ${DOWNLINK}kbit `get_htb_adsll_string`
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$TC class add dev $DEV parent 1:1 classid 1:10 htb $LQ rate ${DOWNLINK}kbit ceil ${DOWNLINK}kbit prio 0 `get_htb_adsll_string`
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# FIXME: I'd prefer to use a pre-nat filter but we need to detect if nat is on this interface
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# AND we need to permute by a random number which we can't do from userspace filters
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# Most high rate flows are REALLY close. This stomps on those harder, but hurts on high rate long distance
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#$TC qdisc add dev $DEV parent 1:10 handle 110: $QDISC limit $LIMIT $ECN interval 20ms target 3ms `get_flows ${DOWNLINK}`
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$TC qdisc add dev $DEV parent 1:10 handle 110: $QDISC `get_limit ${ILIMIT}` `get_target "${ITARGET}" ${DOWNLINK}` `get_ecn ${IECN}` `get_flows ${DOWNLINK}` ${IQDISC_OPTS}
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;;
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esac
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ifconfig $DEV up
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# redirect all IP packets arriving in $IFACE to ifb0
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$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 $DEV
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}
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do_modules
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if [ "$UPLINK" -ne 0 ];
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then
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egress
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sqm_logger "egress shaping activated"
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else
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sqm_logger "egress shaping deactivated"
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tc qdisc del dev $IFACE root 2> /dev/null
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fi
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if [ "$DOWNLINK" -ne 0 ];
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then
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ingress
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sqm_logger "ingress shaping activated"
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else
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sqm_logger "ingress shaping deactivated"
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tc qdisc del dev $DEV root 2> /dev/null
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tc qdisc del dev $IFACE ingress 2> /dev/null
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fi
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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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# Comments
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# This does the right thing with ipv6 traffic.
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# Flaws
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# Many!
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