#!/bin/bash
# New wlan-up script, prompt for which wireless LAN AP we want to use.

# I am deliberately not putting in a WHILE loop. I want it to skip the setup of the WLAN if I
# don't tell it to specifically use one of the lans.

# Global variables:
INTERFACE="ath0"
ESSID="no-essid"
KEY="none"
TIMELIMIT=5

# Show the menu:

echo ""
echo "-=-=-=- Choose a Wireless AP for connection -=-=-=-"
echo "a. Home 54mbit - Bedroom end of house"
echo "b. Home 11mbit - Dining room and Sun Room"
echo "c. University Library"
echo ""
echo "-=-=- Type anything else to cancel connection -=-=-"

read -t ${TIMELIMIT} choice

case $choice in a)
  ESSID="essid1"
  KEY="key1"
esac

case $choice in b)
  ESSID="essid2"
  KEY="key2"
esac

case $choice in c)
  ESSID="essid3"
esac

if echo "${ESSID}" | grep -q "no-essid"
then
  echo "*** Exiting without configuring LAN. You can reinvoke it with /sbin/wlan ***"
else
  echo ""
  echo "Enabling ${INTERFACE}"
  ifconfig ${INTERFACE} up
  echo "  Setting ESSID"
  iwconfig ${INTERFACE} essid ${ESSID}
  sleep 2

  if echo "${KEY}" | grep -q "none"
  then
    echo "  Configuring for access without encryption"
  else
    echo "  Setting Network Key"
    iwconfig ${INTERFACE} key ${KEY}
    sleep 2
  fi

  echo "  Obtaining DHCP"
  killall dhcpcd
  sleep 1
  dhcpcd ${INTERFACE}
fi