WBWE

-- /usr/local/bin/vpn --

#!/bin/bash

PPPD="/usr/sbin/pppd"
SSH="/usr/bin/ssh"
SUDO="/usr/bin/sudo"
USER="$(whoami)"

if ! test -f $PPPD  ; then echo -e "\e[1;31mCan't find $PPPD\033[1;0m";  exit; fi
if ! test -f $SSH   ; then echo -e "\e[1;31mCan't find $SSH\033[1;0m" ;  exit; fi
if ! test -f $SUDO  ; then echo -e "\e[1;31mCan't find $SUDO\033[1;0m";  exit; fi
if [ "$(sudo whoami)" != "root" ]; then echo -e "\e[1;31mYou must be in sudoers file!\033[1;0m"; exit; fi
if [ "$SERVER_PORT" = '' ]; then SERVER_PORT="22"; fi

function connect {
    printf "\n \e[1;34m::\e[1;37m Connecting to $1:\033[1;0m"
    sudo ${PPPD} updetach noauth passive pty "sudo -u $USER ${SSH} -P ${SERVER_HOSTNAME} -l${SERVER_USERNAME} -p $SERVER_PORT -o Batchmode=yes sudo ${PPPD} nodetach notty noauth" ipparam vpn ${CLIENT_IFIPADDR}:${SERVER_IFIPADDR} 2>&1>/dev/null
    for NET in $NETWORKS; do
        sudo route add -net $NET gw $SERVER_IFIPADDR 2>/dev/null
    done
    if [ "$(ifconfig | grep $CLIENT_IFIPADDR)" != '' ]; then
        PID=`ps ax | grep "${SSH} -P ${SERVER_HOSTNAME} -l${SERVER_USERNAME} -p $SERVER_PORT -o" | grep -v ' passive ' | grep -v 'grep ' | awk '{print $1}'`
        echo "$PID $1" | sudo tee /var/run/vpn.pid > /dev/null
        printf " \e[1;32mConnected\033[1;0m\n\n"
    else
        printf " \e[1;31mConnection Failed!\033[1;0m\n\n"
    fi
}

function disconnect {
    if [ -e /var/run/vpn.pid ]; then
        printf "\n \e[1;34m::\e[1;37m Disconnecting from $(cat /var/run/vpn.pid | awk '{print $2}'):\033[1;0m"
        sudo kill $(cat /var/run/vpn.pid | awk '{print $1}')
        sudo rm /var/run/vpn.pid
        printf " \e[1;32mDisconnected\033[1;0m\n"
    else
        printf "\n \e[1;31mFAILED!\033[1;0m\n"
    fi
}

case "$1" in
    stop)
        if [ -e /var/run/vpn.pid ]; then
            disconnect
            printf "\n"
        else
            printf "\n \e[1;34m:: \e[1;37mNothing to disconnect\033[1;0m\n\n"
        fi
    ;;

    -h)
        echo -e "Usage: vpn ($(echo -e $(ls /etc/vpn/) | sed 's/ /|/g')|stop)"
    ;;

    *)
        if [ ! -z "$1" ] && [ -e /etc/vpn/$1 ]; then
            . /etc/vpn/$1

            if [ -e /var/run/vpn.pid ] && [ "$(ifconfig | grep ppp)" != '' ]; then
                printf "\nYou will be disconnected from $(cat /var/run/vpn.pid | awk '{print $2}'). Continue? [y/N] "
                read KEY
                if [ "$KEY" = "Y" ] || [ "$KEY" = "y" ]; then
                    disconnect
                    connect $1
                else
                    echo -e "\nConnection canceled\n"
                fi
            else
                connect $1
            fi
        else
            if [ -z "$1" ]; then
                echo -e "Usage: vpn ($(echo -e $(ls /etc/vpn/) | sed 's/ /|/g')|stop)"
            else
                echo -e "\nConfiguration "$1" not found\n"
            fi
        fi
    ;;
esac

exit 0

-- /etc/vpn/esb --
SERVER_HOSTNAME="xxx.xxx.xxx.xxx"
SERVER_USERNAME="user"
SERVER_IFIPADDR="192.168.11.253"
CLIENT_IFIPADDR="192.168.11.250"
SERVER_PORT="22"
NETWORKS="192.168.12.0/24 192.168.13.0/24"