#!/bin/bash

# Company:      PowerCraft Technology
# Author:       Copyright Jelle de Jong <jelledejong@powercraft.nl>
# Note:         Please send me an email if you enhanced the script
# Version:      0.0.1
# Date:         31-03-2008
# System:       Ubuntu/Debian GNU/Linux
# Description:  Create a HSDPA connection with the USB Huawei E220
# Usage:        Make sure you first followed the setup guide for the device

# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more de/usr/bin/tails.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
# MA 02110-1301, USA.

# todo:
# issues that are not solved:
# find a correct way to use the device without sudo rights
# currently i added wvdial to the sudoers file

# the following iformation is based on the information found in:
# /media/20071107_130928/apn.xml
# when using a vodafone data simcard use "office.vodafone.nl"
# when using a vodafone prepaid simcard use "live.vodafone.com"
# change the apn further below in the Init3 command

cecho()
{
    if [ "$1" = "black" ]; then
        echo -ne "\E[30m"
    elif [ "$1" = "red" ]; then
        echo -ne "\E[31m"
    elif [ "$1" = "green" ]; then
        echo -ne "\E[32m"
    elif [ "$1" = "yellow" ]; then
        echo -ne "\E[33m"
    elif [ "$1" = "blue" ]; then
        echo -ne "\E[34m"
    elif [ "$1" = "magenta" ]; then
        echo -ne "\E[35m"
    elif [ "$1" = "cyan" ]; then
        echo -ne "\E[36m"
    fi

    echo $2 $3
    tput sgr0
}

if [ ! -e /usr/bin/wvdial ]
then
    cecho "red" "wvdial not found, installing now"
    sudo apt-get install wvdial
fi

if [ ! -e /usr/sbin/pppd ]
then
    cecho "red" "pppd not found, installing now"
    sudo apt-get install ppp
fi

if [ ! -e /usr/bin/bwm-ng ]
then
    cecho "red" "bwm-ng not found, installing now"
    sudo apt-get install bwm-ng
fi

#~ if [ $(sudo cat /etc/sudoers | grep "/usr/bin/wvdial") ]
#~ then
    #~ cecho "red" "sudoers and wvdial not configured, configuring now"
    #~ hostname=$(cat /etc/hostname)
    #~ user=$(whoami)
    #~ sudo bash -c "echo $user $hostname = NOPASSWD: /usr/bin/wvdial >> /etc/sudoers"
#~ fi

#~ route -n
#~ route del default gw

sudo rmmod option
sudo rmmod usbserial
sudo modprobe usbserial vendor=0x12d1 product=0x1003
sudo /etc/init.d/networking stop

unset ready
maximum=30
count=0
while [ -z "$ready" ] && [ "$count" -lt "$maximum" ]
do
    count=$(($count+1))

    cd /dev/
    for interface in ttyUSB*
    do
        if [ "$interface" = "ttyUSB0" ]
        then
            ready="true"
        fi
    done

    if [ -z "$ready" ]
    then
        /bin/sleep 1 && /bin/echo -ne "...device not detected, trial: $count/$maximum \r"
    fi
done

if [ -n "$ready" ]
then
    cecho "green" "device detected, continuing now..."
    echo '[Dialer Defaults]' > $HOME/.wvdial.conf
    echo 'Modem = /dev/ttyUSB0' >> $HOME/.wvdial.conf
    echo 'Baud = 7200000' >> $HOME/.wvdial.conf
    echo 'Init1 = ATZ' >> $HOME/.wvdial.conf
    echo 'Init2 = ATQ0 &FE V1 X1 S0=0 &C1 &D2' >> $HOME/.wvdial.conf
    echo 'Init3 = AT+CGDCONT=16,"IP","live.vodafone.com";' >> $HOME/.wvdial.conf
    echo '[Dialer vodafone]' >> $HOME/.wvdial.conf
    echo 'Phone = *99***16#' >> $HOME/.wvdial.conf
    echo 'Username = vodafone' >> $HOME/.wvdial.conf
    echo 'Password = vodafone' >> $HOME/.wvdial.conf
    echo 'Stupid Mode = 1' >> $HOME/.wvdial.conf
    echo 'Debug = 1' >> $HOME/.wvdial.conf

    if [ -f  $HOME/.wvdial.conf ]
    then
        sudo wvdial --no-syslog --config $HOME/.wvdial.conf vodafone &
    fi
else
    cecho "red" "device detection failed, closing now"
    exit
fi

unset ipaddress
maximum=30
count=0
while [ -z "$ipaddress" ] && [ "$count" -lt "$maximum" ]
do
    count=$(($count+1))

    cd /sys/class/net/
    for interface in *
    do
        if [ "$interface" = "ppp0" ] && [ -z "$ipaddress" ]
        then
            ipaddress=$(/sbin/ifconfig $interface | /bin/grep 'inet addr:' | /usr/bin/cut -d: -f2 | /usr/bin/awk '{ print $1}')
            case "$ipaddress" in
            *.*.*.*)
                /bin/echo "received ipaddress: $ipaddress"
                ;;
            esac
        fi
    done

    if [ -z "$ipaddress" ]
    then
        /bin/sleep 2 && /bin/echo -e "get ipaddress trial: $count/$maximum \r"
    fi
done

if [ -n "$ipaddress" ]
then
    cecho "green" "internet adress detected, continuing now..."
    bwm-ng --interfaces ppp0 --output curses --unit bytes --type sum --timeout 500
else
    cecho "red" "connection failed, closing now"
    exit
fi

exit

#~ iptables -t nat -A POSTROUTING -o ppp0 -j MASQUERADE
#~ echo "1" > /proc/sys/net/ipv4/ip_forward