makemon_v1.2-18

#!/bin/bash

trap '{ clear; exit 2; }' SIGINT SIGTERM SIGQUIT

while [ "$UID" != "0" ]; do
    echo "You must be root!"
    exit 1
done

check_iface() {

   if [ ! "$(cat /etc/environment | grep -o 'IFACE[^ ]*')" ]; then

     echo -e "Your global interface variable is not set.\nIt should only need to be set once.\n"
     read -p "Press <enter> to continue"
     echo -e "
#~~~~~~~~~~~~~~~~#
$(iw dev | grep -o 'Interface [^ ]*' | sed -e 's/Interface //g' | sort -n)
#~~~~~~~~~~~~~~~~#\n"
     read -p "Enter a wireless interface to use, [press enter to set later]: " i_face

     if [ "$i_face" ]; then

        echo -e "\nIFACE=$i_face" >> /etc/environment && wait
        echo -e "Your interface has been set. You won't have to set it again so long
as it remains in /etc/environment. To reload /etc/environment,
for system-wide use, log out and then log back in or reboot.\n"
        read -p "press <enter> to continue"

     fi
  fi
}; check_iface
main_interface() {

# For live ISO compatibility IFACE set with iw output.
if [ ! "$IFACE" ]; then

   IFACE="$(iw dev | grep -m1 -o 'Interface w[^ ]*' | sed -e 's/Interface //g')"

fi

clear

echo -e "
#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~#
 1.) Make 1 monitor interface
 2.) Make multiple interfaces
 3.) List created interfaces
 4.) Delete monitor interfaces
 5.) Help menu
 6.) Exit
#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~#     \n"
}

rand_mac() {

   gen() { local NUM="$(tr -dc '0-9a-f' </dev/urandom | head -c 2)"; echo -n "$NUM:"; }

   for c in {1..6}; do

       if [ "$c" -lt "6" ]; then
          gen
       else
          gen | tr -d ':'
       fi

   done
}

remove_mon() {

   count="$(iw dev | grep -o "mon[1-9]" | wc -l)"

   if [ "$count" == "0" ]; then echo -e "\nNo interfaces to remove!"; return; fi

      for a in $(seq 1 $count)
      do

          iw mon${a} del
          clear && echo -e "mon${a} removed..."

      done

   echo -e "\nAll monitor interfaces removed!"
}

# Variable assigned a random mac.
nmac="$(rand_mac)"

make_mon() {

   if [ "$(iw dev | grep -o "mon[1-9]" | wc -l)" -gt "0" ]; then remove_mon; fi
   if [ "$(iw $IFACE interface add mon1 type monitor addr ${1} 2>&1 | grep -Eo 'command failed')" ]; then

      unset nmac; nmac="$(rand_mac)"
      make_mon "$nmac" && wait

   else

      echo -e "\nmon1 is up!"

   fi
}

multi_mon() {

   if [ "$(iw dev | grep -o "mon[1-9]" | wc -l)" -gt "0" ]; then remove_mon; fi
      VNICS="${1}"
   if [ ! "${1}" ]; then read -p "How many VNICs do you want?: " VNICS; echo; fi
      for ((n=1; n <= VNICS; n++))
      do

          maker() {

             if [ "$(iw $IFACE interface add mon${n} type monitor addr $(rand_mac) 2>&1 | grep -Eo 'command failed')" ]; then

                unset nmac; local nmac="$(rand_mac)"
                maker && wait

             else

                clear; echo -e "mon${n} is up..."
                return;

             fi; }; maker; done

   echo -e "\nAll interfaces are up!"
}

list_mon() {

   local count="$(iw dev | grep -o "mon[0-9]" | wc -l)"
   if [ "$count" == "0" ]
      then

          echo -e "\nNo interfaces to list!"

   else

          echo -e "\n [Interfaces Available]"
          echo -e "#~~~~~~~~~~~~~~~~~~~~~~#\n"

          if [ "$count" -gt "10" ]; then

             for ((b=1; b <= count; b++))
             do

                 echo -e " $(iw dev | grep -m1 -Eo "(mon(${b}){1})") $(iw mon${b} info | grep -Eo "([^ ]*[0-9|a-f]:[a-f|0-9]{2})")"

             done | column; echo

          else

             for ((b=1; b <= count; b++))
             do

                 echo -e " $(iw dev | grep -m1 -Eo "(mon(${b}){1})") $(iw mon${b} info | grep -Eo "([^ ]*[0-9|a-f]:[a-f|0-9]{2})")"

             done && echo; fi

   fi
}

help_menu() {

   clear; echo -e "Makemon is a slim tool for creating a single or many virtual
monitor-mode wireless interfaces for various wireless tasks.
You can use command-line options or you can use the simple
command-line user interface to select what options you want
to use.

[USER INTERFACE USAGE]

   Run <makemon> as a command and follow the prompts.

[COMMAND-LINE USAGE]

   makemon [-omlrh] [2..99+]

[OPTIONS]

    -o       Create a single virtual monitor interface.
    -m       Create multiple virtual monitor mode interfaces.
    -l       Show created virtual monitor mode interfaces.
    -r       Delete all virtual monitor interfaces.
    -h       Show this menu.
"
}

if [ ! "${1}" ]; then

   while true; do

         clear && main_interface
         read -p "Enter an option: " CHOICE
         case $CHOICE in

              1) make_mon "$(rand_mac)" && read -p 'press <enter> to continue ' ;;
              2) multi_mon && read -p 'press <enter> to continue ';;
              3) list_mon && read -p 'press <enter> to continue ' ;;
              4) remove_mon && read -p 'press <enter> to continue ' ;;
              5) help_menu && read -p 'press <enter> to continue ';;
              6) exit 0 ;;
              *) echo -e "\n[ERROR]: Not an accepted option!"; read -p 'press <enter> to continue ' ;;

         esac

   done

else

   CHOICE="${1}"
   case $CHOICE in

                -o) make_mon "$(rand_mac)" ;;
                -m) multi_mon "${2}" ;;
                -l) list_mon ;;
                -r) remove_mon ;;
                -h) help_menu ;;
                 *) echo -e "[ERROR]: ${1} is not an accepted option!"; exit 1 ;;
   esac

fi