#!/bin/sh
# @configure_input@
#***********************************************************************
#
# pppoe-start
#
# Shell script to bring up a PPPoE connection
#
# Copyright (C) 2000 Roaring Penguin Software Inc.
#
# $Id: pppoe-start.in,v 1.1 2006/12/31 09:04:39 lzl Exp $
#
# This file may be distributed under the terms of the GNU General
# Public License.
#
# LIC: GPL
#
# Usage: pppoe-start [config_file]
#        pppoe-start interface user [config_file]
# Second form overrides USER and ETH from config file.
# If config_file is omitted, defaults to /etc/ppp/pppoe.conf
#
#***********************************************************************

# From AUTOCONF
prefix=@prefix@
exec_prefix=@exec_prefix@

# Paths to programs
CONNECT=@sbindir@/pppoe-connect
ECHO=@ECHO@
IFCONFIG=/sbin/ifconfig

# Set to "C" locale so we can parse messages from commands
LANG=C
export LANG

# Defaults
CONFIG=/etc/ppp/pppoe.conf
USER=""
ETH=""
ME=`basename $0`
# Must be root
if [ "`@ID@ -u`" != 0 ] ; then
    $ECHO "$ME: You must be root to run this script" >& 2
    exit 1
fi

# Debugging
if [ "$DEBUG" = "1" ] ; then
    $ECHO "*** Running in debug mode... please be patient..."
    DEBUG=/tmp/pppoe-debug-$$
    export DEBUG
    mkdir $DEBUG
    if [ "$?" != 0 ] ; then
	$ECHO "Could not create directory $DEBUG... exiting"
	exit 1
    fi
    DEBUG=$DEBUG/pppoe-debug.txt

    # Initial debug output
    $ECHO "---------------------------------------------" > $DEBUG
    $ECHO "* The following section contains information about your system" >> $DEBUG
    date >> $DEBUG
    $ECHO "Output of uname -a" >> $DEBUG
    uname -a >> $DEBUG
    $ECHO "---------------------------------------------" >> $DEBUG
    $ECHO "* The following section contains information about your network" >> $DEBUG
    $ECHO "* interfaces.  The one you chose for PPPoE should contain the words:" >> $DEBUG
    $ECHO "* 'UP' and 'RUNNING'.  If it does not, you probably have an Ethernet" >> $DEBUG
    $ECHO "* driver problem." >> $DEBUG
    $ECHO "Output of ifconfig -a" >> $DEBUG
    $IFCONFIG -a >> $DEBUG
    $ECHO "---------------------------------------------" >> $DEBUG
    if [ "`uname -s`" = "Linux" ] ; then
        $ECHO "* The following section contains information about kernel modules" >> $DEBUG
	$ECHO "* If the module for your Ethernet card is 'tulip', you might" >> $DEBUG
	$ECHO "* want to look for an updated version at http://www.scyld.com" >> $DEBUG
	$ECHO "Output of lsmod" >> $DEBUG
	lsmod >> $DEBUG
	$ECHO "---------------------------------------------" >> $DEBUG
    fi
    $ECHO "* The following section lists your routing table." >> $DEBUG
    $ECHO "* If you have an entry which starts with '0.0.0.0', you probably" >> $DEBUG
    $ECHO "* have defined a default route and gateway, and pppd will" >> $DEBUG
    $ECHO "* not create a default route using your ISP.  Try getting" >> $DEBUG
    $ECHO "* rid of this route." >> $DEBUG
    $ECHO "Output of netstat -n -r" >> $DEBUG
    netstat -n -r >> $DEBUG
    $ECHO "---------------------------------------------" >> $DEBUG
    $ECHO "Contents of /etc/resolv.conf" >> $DEBUG
    $ECHO "* The following section lists DNS setup." >> $DEBUG
    $ECHO "* If you can browse by IP address, but not name, suspect" >> $DEBUG
    $ECHO "* a DNS problem." >> $DEBUG
    cat /etc/resolv.conf >> $DEBUG
    $ECHO "---------------------------------------------" >> $DEBUG
    $ECHO "* The following section lists /etc/ppp/options." >> $DEBUG
    $ECHO "* You should have NOTHING in that file." >> $DEBUG
    $ECHO "Contents of /etc/ppp/options" >> $DEBUG
    cat /etc/ppp/options >> $DEBUG 2>/dev/null
    $ECHO "---------------------------------------------" >> $DEBUG
else
    DEBUG=""
fi

# Sort out command-line arguments
case "$#" in
    1)
	CONFIG="$1"
	;;
    3)
	CONFIG="$3"
	;;
esac

if [ ! -f "$CONFIG" -o ! -r "$CONFIG" ] ; then
    $ECHO "$ME: Cannot read configuration file '$CONFIG'" >& 2
    exit 1
fi
export CONFIG
. $CONFIG

# Check for command-line overriding of ETH and USER
case "$#" in
    2|3)
	ETH="$1"
	USER="$2"
	;;
esac

# Check for pidfile
if [ -r "$PIDFILE" ] ; then
    PID=`cat "$PIDFILE"`
    # Check if still running
    kill -0 $PID > /dev/null 2>&1
    if [ $? = 0 ] ; then
	$ECHO "$ME: There already seems to be a PPPoE connection up (PID $PID)" >& 2
	exit 1
    fi
    # Delete bogus PIDFILE
    rm -f "$PIDFILE" "$PIDFILE.pppd" "$PIDFILE.pppoe" "$PIDFILE.start"
fi

echo $$ > $PIDFILE.start

# Start the connection in the background unless we're debugging
if [ "$DEBUG" != "" ] ; then
    $CONNECT "$@"
    exit 0
fi

$CONNECT "$@" > /dev/null 2>&1 &
CONNECT_PID=$!

if [ "$CONNECT_TIMEOUT" = "" -o "$CONNECT_TIMEOUT" = 0 ] ; then
    exit 0
fi

# Don't monitor connection if dial-on-demand
if [ "$DEMAND" != "" -a "$DEMAND" != "no" ] ; then
    exit 0
fi

# Monitor connection
TIME=0
while [ true ] ; do
    @sbindir@/pppoe-status $CONFIG > /dev/null 2>&1

    # Looks like the interface came up
    if [ $? = 0 ] ; then
	# Print newline if standard input is a TTY
	tty -s && $ECHO " Connected!"
	exit 0
    fi

    if test -n "$FORCEPING" ; then
	printf "%s" "$FORCEPING"
    else
	tty -s && printf "%s" "$PING"
    fi
    sleep $CONNECT_POLL
    TIME=`expr $TIME + $CONNECT_POLL`
    if [ $TIME -gt $CONNECT_TIMEOUT ] ; then
	break
    fi
done

$ECHO "TIMED OUT" >& 2
# Timed out!  Kill the pppoe-connect process and quit
kill $CONNECT_PID > /dev/null 2>&1

# Clean up PIDFILE(s)
rm -f "$PIDFILE" "$PIDFILE.pppd" "$PIDFILE.pppoe" "$PIDFILE.start"

exit 1

