band

#! /usr/bin/env bash

GREP=ggrep

# parameters
BAND=$1
CHANNEL=${2:-0}

# determine the router ip
ROUTER=$(netstat -nr | $GREP -oP '(?<=^default) +[^ ]+' | $GREP -oP '[^ ]+')

# get username/password from .netrc
NETRC=${NETRC:-$HOME/.netrc}
USERNAME=$($GREP -zoP "(?<=^machine $ROUTER\n  login ).+$" "$NETRC")
PASSWORD=$($GREP -zoP "(?<=^machine $ROUTER\n  login $USERNAME\n  password ).+$" "$NETRC")

# defaults for wlan
declare -A WLAN_DEFAULTS
WLAN_DEFAULTS=(
  [WirelessEnable]=1
  [OutputPower]=100
  [NMode]=1
  [restoreWirelessDefaults]=0
  [commitwlanRadio]=1
)

# parsing regexes
declare -A CHECK
CHECK=(
  [band]='(?<=Current&nbsp;:&nbsp; )\d(\.\d)? GHz'
  [channel]='(?<=Current&nbsp;:&nbsp; )\d+(?= \*\*\*Interference Level: )'
  [int]='(?<=Interference Level: )\w+'
)

# strip values from output
function check() {
  curl -s http://$ROUTER/wlanRadio.asp | $GREP -aoP "${CHECK[$1]}"
}


# login
curl -d "loginUsername=$USERNAME&loginPassword=$PASSWORD" http://$ROUTER/goform/login

# update settings
if [[ $1 != "" ]]; then
  echo -n "$(check band) ($(check channel)) -> "
  QUERY="Band=$BAND&ChannelNumber=$CHANNEL"
  QUERY=${QUERY}$(for x in "${!WLAN_DEFAULTS[@]}"; do echo -n "&$x=${WLAN_DEFAULTS[$x]}"; done)
  curl -d "$QUERY" http://$ROUTER/goform/wlanRadio
fi

# check state
echo "$(check band) ($(check channel))"
echo "Interference: $(check int)"