#!/bin/sh
#
# Author      : Edouard Gomez <ed.gomez@free.fr>
# Last Modifs : May, the 7th 2002
#
# ToDo : this needs a special module configuration for debian
#        which uses files in /etc/modules/ and then run update-modules
#

# Configuration script for the pppd daemon
PEER="adsl"
PPP_DIR="/etc/ppp"
PEER_DIR=$PPP_DIR"/peers"
PEER_FILE=$PEER_DIR"/"$PEER
CHAP_FILE="/etc/ppp/chap-secrets"
PAP_FILE="/etc/ppp/pap-secrets"
PPPOA3=`which pppoa3`
WHOAMI=`whoami`

echo "PPPD Configuration Script for GNU/Linux"
echo

if [ "$WHOAMI" != "root" ]; then
  echo "You must launch this script with root privileges"
  exit -1
fi

if [ ! -x $PPOA3 ] ; then
  echo "You must install the drivers first"
  exit -1
fi

# Reads user input
read -p "Login    : " LOGIN
read -p "Password : " PASSWORD

cat << EOF

You will be prompted for your Vpi Vci,
Here are some working values but your configuration may differ

+----------------+---------+
|    Country     | vpi.vci |
+----------------+---------+
|Belgium, ?      |   8.35  |
+----------------+---------+
|Denmark, Orange |   8.35  |
+----------------+---------+
|France, wanadoo |   8.35  |
+----------------+---------+
|France, ?       |   8.67  |
+----------------+---------+
|Italy, ?        |   8.35  |
+----------------+---------+
|Netherlands, ?  |   8.48  |
+----------------+---------+
|UK, BTopenworld |   0.38  |
+----------------+---------+
|US, BellSouth   |   8.35  |
+----------------+---------+

EOF

read -p "Your Vpi      : " VPI
read -p "Your Vci      : " VCI

cat << EOF


Now you will be prompted for some pppd options
Answer Y/y or N/n

EOF

read -p "Do you want pppd to reconnect automatically ? : " PERSISTA
read -p "Do you want pppd to use peer DNS ? : " DNSPEERA
read -p "Do you want to set the adsl connection as your default route ? : " DEFA
echo "Do you want pppd to be in debug mode ?"
read -p "(usefull if you install this package for the 1st time) : " DEBUGA

if [ $PERSISTA == "Y" ] || [ $PERSISTA == "y" ] ; then
  PERSIST="persist"
else
  PERSIST="#persist"
fi

if [ $DNSPEERA == "Y" ] || [ $DNSPEERA == "y" ] ; then
  DNSPEER="usepeerdns"
else
  DNSPEER="#usepeerdns"
fi

if [ $DEFA == "Y" ] || [ $DEFA == "y" ] ; then
  DEF="defaultroute"
else
  DEF="#defaultroute"
fi

if [ $DEBUGA == "Y" ] || [ $DEBUGA =="y" ] ; then
  DEBUG1="debug"
  DEBUG2="kdebug 1"
else
  DEBUG1="#debug"
  DEBUG2="#kdebug 1"
fi

# Generates chap/pap-secrets line
SECRETLINE="\"$LOGIN\" \"*\" \"$PASSWORD\" \"*\""

# Generates the user line needed in /etc/ppp/peers/adsl
USERLINE="user \"$LOGIN\""

# Creates /etc/ppp/peers
if [ ! -d $PEER_DIRECTORY ] ; then
  echo "Creating /etc/ppp/peers directory"
  mkdir /etc/ppp/peers
fi

# Check /etc/ppp/peers/adsl existence
if [ -f $PEER_FILE ] ; then
  read -p "Do you want to overwrite $PEER_FILE (y/n) : " ANSWER
  if [ $ANSWER == "n" ] || [ $ANSWER == "N" ] ; then
     exit 1
  fi
  rm -f $PEER_FILE
  touch $PEER_FILE
fi

#
# Generates /etc/ppp/peers/adsl file
#

echo Generating $PEER_FILE
echo "PPPoA3 is located there : $PPPOA3"
cat > $PEER_FILE <<EOF
# ##########################################################################
#
# Automatically generated on $(date)
# by adsl-conf-pppd for User space Speedtouch USB driver
#
# This file could be rename but its place is under $PEER_DIRECTORY
# To connect to Internet using this configuration file
# pppd call $PEER
#
# ##########################################################################

#
# Put your ISP login name here and update your chap-secrets
# (This example is a typical Wanadoo.fr login)
#

$USERLINE

#
# PPPoA3 daemon is the default one but you can use the old PPPoA2
#
# To help you for your choice :
#
# pppoa3 is multithreaded, has more features, has a better design.
# pppoa2 is simpler but is deprecated due to its limited design.
#
# pppoa2 is still in this driver set because BSD systems have a
# problem with usb+multithreading but all GNU/Linux systems should
# use pppoa3
#

#
# Comment only one of those pty option
#
# Don't forget to adapt the vpi.vci couple to your ISP/country settings
# Read the FAQ for some vpi.vci couples
#
# If you installed from a rpm or deb package the right path is /usr/sbin
# instead of /usr/local/sbin
#


#pty "$PPPOA3 -vpi $VPI -vci $VCI"
pty "$PPPOA3 -c -m 1 -vpi $VPI -vci $VCI"

#
# pppoa2 must run in sync mode, this option must be set.
#
# pppoa3 can run in either sync or async mode
#
# In order to use the async mode with pppoa3 :
#   - comment this option
#   - replace the pty "..." line with this one
#     pty "$PPPOA3 -a -c -m 1 -vpi $VPI -vci $VCI"
#

sync

#
# We don't need a default ip, and we don't need the peer to auth itself
#

noauth
noipdefault

#
# We don't want to negociate compression schemes at all
#

noaccomp
nopcomp
noccp
novj

#
# Makes pppd "dial again" when the connection is lost
#

$PERSIST

#
# pppd will try to connect "maxfail" times and wait "holdoff" seconds
# between each try.
#

holdoff 4
maxfail 25

#
# Asks your ISP for its DNS ip
# (look at the /etc/ppp/resolv.conf)
#

$DNSPEER

#
# Makes this ppp link the default inet route
# (route -n to check it)
#

$DEF

#
# If something goes wrong try uncommenting this
#

$DEBUG1
$DEBUG2

#
# LCP requests are not mandatory plus they fail
# on some systems
#
#lcp-echo-interval 600
#lcp-echo-failure 10
EOF

echo Saving your pppd options file
cp -f /etc/ppp/options /etc/ppp/options.bak
echo Creating the new one
cat > $PPP_DIR"/options" << EOF
lock
noauth
noipdefault
usepeerdns
EOF

#
# Generates user/password entry in chap and pap secrets files
#

# Creates the chap file if needed
if [ ! -f $CHAP_FILE ] ; then
  echo Creating $CHAP_FILE
  touch $CHAP_FILE
  chmod 600 $CHAP_FILE
  echo "# Secrets for authentication using CHAP" > $CHAP_FILE
  echo "# client        server         secret         IP addresses" >> $CHAP_FILE
fi

# Creates the pap file if needed
if [ ! -f $PAP_FILE ] ; then
  echo Creating $PAP_FILE
  touch $PAP_FILE
  chmod 600 $PAP_FILE
  echo "# Secrets for authentication using PAP" > $PAP_FILE
  echo "# client        server         secret         IP addresses" >> $PAP_FILE
fi

# Saves old files
echo Saving old $CHAP_FILE to $CHAP_FILE.old
cp -f $CHAP_FILE $CHAP_FILE.old
chmod 600 $CHAP_FILE.old

echo Saving old $PAP_FILE to $PAP_FILE.old
cp -f $PAP_FILE  $PAP_FILE.old
chmod 600 $PAP_FILE.old

# Remove old login entry from pap and chap file
echo Removing old $LOGIN entry from $CHAP_FILE
grep -v $LOGIN $CHAP_FILE.old > $CHAP_FILE
echo Removing old $LOGIN entry from $PAP_FILE
grep -v $LOGIN $PAP_FILE.old  > $PAP_FILE

# Add the new entry
echo Adding new $LOGIN entry to $CHAP_FILE
echo $SECRETLINE >> $CHAP_FILE
echo Adding new $LOGIN entry to $PAP_FILE
echo $SECRETLINE >> $PAP_FILE

#
# Add ppp entries to /etc/modules.conf
#

if [ -f /etc/conf.modules ] ; then
  MODULE_CONF="/etc/conf.modules"
fi

if [ -f /etc/modules.conf ] ; then
  MODULE_CONF="/etc/modules.conf"
fi

#
# We handle the Debian way here
#
if [ -f /etc/debian_version ]; then
  MODULE_CONF="/etc/modutils/hdlc"
  echo "Configuring the modules.conf the debian way !"
fi

echo "Adding ppp entries to your $MODULE_CONF"

# This bunch of aliases are already defined in debian systems
if [ ! -f /etc/debian_version ]; then

  echo >> $MODULE_CONF
  grep -q "char-major-108" $MODULE_CONF
  if [ $? -ne 0 ] ; then
    echo "alias char-major-108  ppp_generic" >> $MODULE_CONF
  fi 
  grep -q "tty-ldisc-3" $MODULE_CONF
  if [ $? -ne 0 ] ; then
    echo "alias tty-ldisc-3     ppp_async" >> $MODULE_CONF
  fi

fi

# This one needs to be added in every case
grep -q "tty-ldisc-13" $MODULE_CONF
if [ $? -ne 0 ] ; then
  echo "alias tty-ldisc-13    n_hdlc" >> $MODULE_CONF
fi

# This bunch of aliases are also already defined in debian systems
if [ ! -f /etc/debian_version ]; then

  grep -q "tty-ldisc-14" $MODULE_CONF
  if [ $? -ne 0 ] ; then
    echo "alias tty-ldisc-14    ppp_synctty" >> $MODULE_CONF
  fi
  grep -q "ppp-compress-21" $MODULE_CONF
  if [ $? -ne 0 ] ; then
    echo "alias ppp-compress-21 bsd_comp" >> $MODULE_CONF
  fi
  grep -q "ppp-compress-24" $MODULE_CONF
  if [ $? -ne 0 ] ; then
    echo "alias ppp-compress-24 ppp_deflate" >> $MODULE_CONF
  fi
  grep -q "ppp-compress-26" $MODULE_CONF
  if [ $? -ne 0 ] ; then
    echo "alias ppp-compress-26 ppp_deflate" >> $MODULE_CONF
  fi

fi

#
# We update the /etc/modules.conf with the debian tool
#
if [ -f /etc/debian_version ]; then
  echo "Updating /etc/modules.conf using update-modules"
  update-modules
fi

# Finished...
echo
echo PPPD configuration done.