#!/bin/sh
# @configure_input@
#***********************************************************************
#
# adsl-connect
#
# Shell script to connect to an ADSL provider using PPPoE
#
# Copyright (C) 2000 Roaring Penguin Software Inc.
#
# $Id$
#
# This file may be distributed under the terms of the GNU General
# Public License.
#
# Usage: adsl-connect [config_file]
#        adsl-connect 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@
localstatedir=/var

# Paths to programs
IFCONFIG=/sbin/ifconfig
PPPD=@PPPD@
SETSID=@SETSID@
PPPOE=@sbindir@/pppoe
LOGGER="/usr/bin/logger -t `basename $0`"

# Must be root
if test "`id -u`" != 0 ; then
    echo "$0: You must be root to run this script" >& 2
    exit 1
fi

if test "$SETSID" != "" -a ! -x "$SETSID"; then
    SETSID=""
fi

CONFIG=/etc//ppp/pppoe.conf
USER=""
ETH=""

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

if test ! -f "$CONFIG" -o ! -r "$CONFIG" ; then
    echo "$0: Cannot read configuration file '$CONFIG'" >& 2
    exit 1
fi

. $CONFIG

PPPOE_PIDFILE="$PIDFILE.pppoe"
PPPD_PIDFILE="$PIDFILE.pppd"

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

# Check that config file is sane
if test "$USER" = "" ; then
    echo "$0: Check '$CONFIG' -- no setting for USER" >& 2
    exit 1
fi
if test "$ETH" = "" ; then
    echo "$0: Check '$CONFIG' -- no setting for ETH" >& 2
    exit 1
fi

PPPD_PID=0

# Catch common error
if test "$DEBUG" = "1" ; then
    echo "*** If you want to use DEBUG, invoke adsl-start, not adsl-connect."
    exit 1
fi

if test "$DEBUG" != "" ; then
    echo "ETH=$ETH; USER=$USER" >> $DEBUG
    echo "---------------------------------------------" >> $DEBUG
fi

# MTU of Ethernet card attached to modem MUST be 1500.  This apparently
# fails on some *BSD's, so we'll only do it under Linux

if test `uname -s` = Linux ; then
    $IFCONFIG $ETH up mtu 1500
fi

if test "$SYNCHRONOUS" = "yes" ; then
	PPPOE_SYNC=-s
	PPPD_SYNC=sync
	# Increase the chances of it working on Linux...
	if test `uname -s` = Linux ; then
	    modprobe n_hdlc > /dev/null 2>&1
	fi
else
	PPPOE_SYNC=""
	PPPD_SYNC=""
fi

if test "$CLAMPMSS" = "no" ; then
	CLAMPMSS=""
else
	CLAMPMSS="-m $CLAMPMSS"
fi

if test "$USEPEERDNS" = "yes" ; then
	USEPEERDNS="usepeerdns"
else
	USEPEERDNS=""
fi

# Backward config file compatibility
if test "$DEMAND" = "" ; then
	DEMAND=no
fi

if test "$DEMAND" = "no" ; then
	DEMAND=""
else
	DEMAND="demand persist idle $DEMAND 10.112.112.112:10.112.112.113 ipcp-accept-remote ipcp-accept-local connect true noipdefault ktune"
fi

case "$FIREWALL" in
    STANDALONE)
	. /etc/ppp/firewall-standalone
	;;
    MASQUERADE)
	. /etc/ppp/firewall-masq
	;;
esac

# Standard PPP options we always use
PPP_STD_OPTIONS="noipdefault noauth defaultroute hide-password nodetach $USEPEERDNS local mtu 1492 mru 1492 noaccomp noccp nobsdcomp nodeflate nopcomp novj novjccomp user $USER lcp-echo-interval $LCP_INTERVAL lcp-echo-failure $LCP_FAILURE"

# PPPoE invocation
PPPOE_CMD="$PPPOE -p $PPPOE_PIDFILE -I $ETH -T $PPPOE_TIMEOUT $PPPOE_SYNC $CLAMPMSS $PPPOE_EXTRA"
if test "$DEBUG" != "" ; then
    if test "$DEMAND" != "" ; then
	echo "(Turning off DEMAND for debugging purposes)"
	DEMAND=""
    fi
    echo "pppd invocation" >> $DEBUG
    echo "$SETSID $PPPD pty '$PPPOE_CMD' $PPP_STD_OPTIONS $PPPD_SYNC debug" >> $DEBUG
    echo "---------------------------------------------" >> $DEBUG
    $SETSID $PPPD pty "$PPPOE_CMD -D $DEBUG-0" \
	$PPP_STD_OPTIONS \
	$PPPD_SYNC \
	debug >> $DEBUG 2>&1
    echo "---------------------------------------------" >> $DEBUG

    echo "Extract from /var/log/messages" >> $DEBUG
    grep 'ppp' /var/log/messages | tail -150 >> $DEBUG
    date >> $DEBUG
    echo "---------------------------------------------" >> $DEBUG
    echo "rp-pppoe debugging dump" >> $DEBUG
    cat $DEBUG-0 >> $DEBUG
    rm -f $DEBUG-0
    for i in 1 2 3 4 5 6 7 8 9 10 ; do
    echo ""
    echo ""
    echo ""
    done
    echo "*** Finished debugging run.  Please review the file"
    echo "*** '$DEBUG' and make sure it does not contain"
    echo "*** any sensitive information.  Once you are satisfied with it,"
    echo "*** e-mail it to 'pppoe@roaringpenguin.com' for diagnosis."
    echo ""
    echo "*** BUT BEFORE YOU DO THIS, make sure you have read the HOW-TO-CONNECT"
    echo "*** file which came with the rp-pppoe package."
    exit 0
fi

echo $$ > $PIDFILE

while [ true ] ; do
    $SETSID $PPPD pty "$PPPOE_CMD" \
	$PPP_STD_OPTIONS \
	$DEMAND \
	$PPPD_SYNC &
    echo "$!" > $PPPD_PIDFILE
    wait

    # Otherwise, re-establish the connection
    $LOGGER -p daemon.notice \
        "ADSL connection lost; attempting re-connection."
done