#!/bin/sh
# Cero3 Simple Shaper
# A 1 tin cake shaper for
# ethernet gateways. This is nearly the simplest possible

# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
#       Copyright (C) 2012-5 Michael D. Taht, Toke Høiland-Jørgensen, Sebastian Moeller


. ${SQM_LIB_DIR}/defaults.sh
QDISC=cake


# to keep this as simple as possible we ignore the *_CAKE_OPTS from defaults.sh
INGRESS_CAKE_OPTS="besteffort"
EGRESS_CAKE_OPTS="besteffort"


egress() {
    sqm_debug "egress"
    SILENT=1 $TC qdisc del dev $IFACE root
    $TC qdisc add dev $IFACE root $( get_stab_string ) cake \
        bandwidth ${UPLINK}kbit $( get_cake_lla_string ) ${EGRESS_CAKE_OPTS} ${EQDISC_OPTS}
}


ingress() {
    sqm_debug "ingress"

    SILENT=1 $TC qdisc del dev $IFACE handle ffff: ingress
    $TC qdisc add dev $IFACE handle ffff: ingress
    SILENT=1 $TC qdisc del dev $DEV root

    [ "$ZERO_DSCP_INGRESS" -eq "1" ] && INGRESS_CAKE_OPTS="$INGRESS_CAKE_OPTS wash"

    $TC qdisc add dev $DEV root $( get_stab_string ) cake \
        bandwidth ${DOWNLINK}kbit $( get_cake_lla_string ) ${INGRESS_CAKE_OPTS} ${IQDISC_OPTS}

    $IP link set dev $DEV up

    # redirect all IP packets arriving in $IFACE to ifb0

    $TC filter add dev $IFACE parent ffff: protocol all prio 10 u32 \
	match u32 0 0 flowid 1:1 action mirred egress redirect dev $DEV
}

sqm_prepare_script() {
    do_modules
    verify_qdisc $QDISC "cake" || return 1
}