A shell script to get the 150 IPs of xjtu lib.

xjtulib.sh

#!/bin/sh

lock=/tmp/mac_lock
wlan=wlan0
essid=xjtu_lib
mac_base="C9:1A:B9:6B:6C:"

function req_addr() {
    if [ -f "$lock" ]
    then
        echo "Please remove the lock $lock first."
    else
        sudo touch $lock

        sudo ifconfig $wlan down
        sudo ifconfig $wlan hw ether $mac_base$mac_count
        sudo ifconfig $wlan up
        echo "Interface $wlan is working." 

        sudo iwconfig $wlan mode managed
        sudo iwconfig $wlan essid "$essid"
        sudo dhcpcd $wlan
        echo "Got an IP address."

        sudo dhcpcd -x $wlan

        sudo rm $lock
    fi
}

for count in `seq 0 255`
do
    mac_count=$(printf "%.2X\n" $count)
    req_addr
done