#!/bin/sh

MODEM_HOST="Cable Modem"
MODEM_IP="192.168.100.1"
SIGNAL_URL="http://$MODEM_IP/RgSignal.asp"
ZABBIX_SERVER="127.0.0.1"

curl --silent "$SIGNAL_URL" |
sed -n -e '
/Downstream/,/Upstream/ {
# 0,/Downstream/               { s/<[^>]*>/ /g p }
  /Frequency/                  { s/<[^>]*>/ /g ; s/[^0-9]*\([0-9.]*\).*/- surfboard.downstream.frequency \1/ p }
  /Power Level/ { /snapshot/ ! { s/<[^>]*>/ /g ; s/[^0-9]*\([0-9.]*\).*/- surfboard.downstream.power \1/ p } }
  /Signal To Noise Ratio/      { s/<[^>]*>/ /g ; s/[^0-9]*\([0-9.]*\).*/- surfboard.downstream.snr \1/ p }
}
/Upstream/,/Downstream/ {
# 0,/Upstream/ { s/<[^>]*>/ /g p }
# /Channel/    { s/<[^>]*>/ /g p }
  /Frequency/  { s/<[^>]*>/ /g ; s/[^0-9]*\([0-9.]*\).*/- surfboard.upstream.frequency \1/ p }
  /Power/      { s/<[^>]*>/ /g ; s/[^0-9]*\([0-9.]*\).*/- surfboard.upstream.power \1/ p }
}' |
zabbix_sender --zabbix-server "$ZABBIX_SERVER" --host "$MODEM_HOST" --input-file -