Crude dynamic SQM rate adjustment for DSL lines in OpenWRT

#!/bin/sh

drate="$(/etc/init.d/dsl_control dslstat |jq .downstream.attndr |awk '{print $1 / 1024}')"
urate="$(/etc/init.d/dsl_control dslstat |jq .upstream.attndr |awk '{print $1 / 1024}')"
drate_r="$(echo $drate |sed 's/\.\d//')"
urate_r="$(echo $urate |sed 's/\.\d//')"

down="$(echo $drate_r |awk '{print ($1 / 100) * 95}' |sed 's/\.\d//')"
up="$(echo $urate_r |awk '{print ($1 / 100) * 95}' |sed 's/\.\d//')"

curdown="$(uci get sqm.@queue[0].download)"
curup="$(uci get sqm.@queue[0].upload)"
l2curdown="$(uci get sqm.@queue[0].download)"
l2curup="$(uci get sqm.@queue[0].upload)"

l2up="$(echo $up |awk '{print $1 * 2}' |sed 's/\.\d//')"
l2down="$(echo $down |awk '{print $1 / 1.85}' |sed 's/\.\d//')"

state="1"

if [ $down = $curdown ] && [ $up = $curup ]; then
        logger -t SQMDSLTune -p user.info "Attainable rate same from last check!"
   else
 if [ $down > 0 ]; then
        uci set "sqm.@queue[0].download=$down"
        uci set "sqm.@queue[1].download=$l2down"
    else
        state="2"
 fi
 if [ $up > 0 ]; then
        uci set "sqm.@queue[0].upload=$up"
        uci set "sqm.@queue[1].upload=$l2up"
    else
        logger -t SQMDSLTune -p user.info "No need to adjust TX rate for SQM"
        state="2"
 fi
  if [ $state = 2 ]; then
        logger -t SQMDSLTune -p user.info "No adjustments needed!"
        exit 0
    else
        uci commit sqm
        logger -t SQMDSLTune -p user.info "Data rates for SQM being adjusted: DSL Up=$up/Down=$down | L2TP Up=$l2up/Down=$l2down"
        /etc/init.d/sqm reload
  fi
fi