waveguide/fake/iw

#!/bin/sh
echo "fake/iw:" "$@" >&2
cd "$(dirname "$0")"

if [ "$1" = "phy" ]; then
  phy=$2
  dev=
elif [ "$1" = "dev" ]; then
  phy=
  dev=$2
elif [ "$1" = "sleepn" ]; then
  sleep $2
  exit 99
else
  echo "fake/iw: first arg ('$1') must be 'dev' or 'phy'" >&2
  exit 99
fi

channel_scan() {
  want_freq=$1
  [ -r "scanresults.$dev" ] || return 0
  while IFS=, read bss freq rssi last_seen junk; do
    if [ -z "$want_freq" ] || [ "$freq" = "$want_freq" ]; then
      echo "BSS $bss"
      echo "  freq: $freq"
      echo "  signal: $rssi dBm"
      echo "  last seen: $last_seen ms ago"
      echo "  Country: US     Environment: Indoor/Outdoor"
      echo "  capability: ESS Privacy ShortPreamble ShortSlotTime (0x0431)"
      echo "  HT capabilities:"
    fi
  done <scanresults.$dev
}

words=$(IFS=-; echo "$*")
case "$words" in
  phy-*-info)
    echo '* 2412 MHz [42] (ok)'
    echo '* 2417 MHz [43] (ok)'
    exit 0
    ;;
  dev-*-scan-freq-*)
    channel_scan "$5"
    ;;
  dev-*-scan*)
    channel_scan
    ;;
  dev-*-survey-dump)
    exit 0
    ;;
  dev-*-station-dump)
    [ -r "stationdump.$dev" ] && cat "stationdump.$dev"
    exit 0
    ;;
  *)
    exit 1
    ;;
esac
# not reached