#!/bin/sh
# ../scripts/pppoe-connect.  Generated from pppoe-connect.in by configure.
#***********************************************************************
#
# pppoe-connect
#
# Shell script to connect to a PPPoE provider
#
# Copyright (C) 2000 Roaring Penguin Software Inc.
#
# $Id$
#
# This file may be distributed under the terms of the GNU General
# Public License.
#
# LIC: GPL
#
# Usage: pppoe-connect [config_file]
#        pppoe-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=/usr
exec_prefix=${prefix}
localstatedir=/var

# Paths to programs
IFCONFIG=/sbin/ifconfig
PPPD=/usr/sbin/pppd
SETSID=/usr/bin/setsid
PPPOE=${exec_prefix}/sbin/pppoe
LOGGER="/usr/bin/logger -t `basename $0`"

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

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

##GMTK: $SETSID != "" && executable
#if test "$SETSID" != "" -a ! -x "$SETSID"; then
#    SETSID=""
#fi
##GMTK: END

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

##GMTK: defaults to /etc//ppp/pppoe.conf
# 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
export CONFIG
. $CONFIG

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

##GMTK: Use the $ETH & $USER in pppoe.conf
# Check for command-line overriding of ETH and USER
#case "$#" 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

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

##GMTK: LINUX_PLUGIN==""
#if test "$DEBUG" != "" ; then
#    if test "$LINUX_PLUGIN" != "" ; then
#	echo "Cannot use DEBUG mode and LINUX_PLUGIN at the same time."
#	echo "Kernel-mode PPPoE is experimental and unsupported."
#	exit 1
#    fi
#    echo "* The following section identifies your Ethernet interface" >> $DEBUG
#    echo "* and user name.  Some ISP's need 'username'; others" >> $DEBUG
#    echo "* need 'username@isp.com'.  Try both" >> $DEBUG
#    echo "ETH=$ETH; USER=$USER" >> $DEBUG
#    echo "---------------------------------------------" >> $DEBUG
#fi
##GMTK: END

# 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 $ETH up mtu 1500
    # For 2.4 kernels.  Will fail on 2.2.x, but who cares?
#    modprobe ppp_generic > /dev/null 2>&1
#    modprobe ppp_async > /dev/null 2>&1
#    modprobe ppp_synctty > /dev/null 2>&1
#    if test -n "$LINUX_PLUGIN" ; then
#	modprobe pppox > /dev/null 2>&1
#	modprobe pppoe > /dev/null 2>&1
#    fi
#fi

##GMTK: SYNCHRONOUS=no
#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
##GMTK: END

##GMTK: ACNAME=""
#if test -n "$ACNAME" ; then
#    ACNAME="-C $ACNAME"
#fi
##GMTK: END

if test -n "$SERVICENAME" ; then
    SERVICENAMEOPT="-S $SERVICENAME"
else
    SERVICENAMEOPT=""
fi

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

##GMTK: DNSTYPE=SERVER ==> PEERDNS=usepeerdns
# If DNSTYPE is SERVER, we must use "usepeerdns" option to pppd.
#if test "$DNSTYPE" = "SERVER" ; then
#    PEERDNS=yes
#    USEPEERDNS=yes
#fi
#
#if test "$PEERDNS" = "yes" ; then
#    PEERDNS="usepeerdns"
#else
#    PEERDNS=""
#fi
#
## Backward config file compatibility -- PEERDNS used to be USEPEERDNS
#if test "$USEPEERDNS" = "yes" ; then
#    PEERDNS="usepeerdns"
#fi
#if test "$USEPEERDNS" = "no" ; then
#    PEERDNS=""
#fi
##GMTK: END

##GMTK: DEMAND==""
# 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
##GMTK: END

##GMTK: FIREWALL=NONE
#case "$FIREWALL" in
#    STANDALONE)
#    . /etc/ppp/firewall-standalone
#    ;;
#    MASQUERADE)
#    . /etc/ppp/firewall-masq
#    ;;
#esac
##GMTK: END

##GMTK: LINUX_PLUGIN==""
# If we're using kernel-mode PPPoE on Linux...
#if test "$LINUX_PLUGIN" != "" ; then
#    PLUGIN_OPTS="plugin $LINUX_PLUGIN nic-$ETH"
#    if test -n "$SERVICENAME" ; then
#	PLUGIN_OPTS="$PLUGIN_OPTS rp_pppoe_service $SERVICENAME"
#    fi
#    modprobe pppoe > /dev/null 2>&1
#fi
##GMTK: END

##GMTK: DEFAULTROUTE=yes
#if test "$DEFAULTROUTE" != "no" ; then
#    DEFAULTROUTE="defaultroute"
#else
#    DEFAULTROUTE=""
#fi
##GMTK: END

# Standard PPP options we always use
#PPP_STD_OPTIONS="$PLUGIN_OPTS noipdefault noauth default-asyncmap $DEFAULTROUTE hide-password nodetach $PEERDNS mtu 1492 mru 1492 noaccomp nodeflate nopcomp novj novjccomp user $USER lcp-echo-interval $LCP_INTERVAL lcp-echo-failure $LCP_FAILURE $PPPD_EXTRA"

PPP_STD_OPTIONS="noipdefault noauth default-asyncmap defaultroute hide-password nodetach usepeerdns mtu 1492 mru 1492 noaccomp nodeflate nopcomp novj novjccomp user $USER lcp-echo-interval $LCP_INTERVAL lcp-echo-failure $LCP_FAILURE $PPPD_EXTRA"

##GMTK: DNSTYPE=SERVER
# Jigger DNS if required...
#if test "$DNSTYPE" = "SERVER" ; then
    # Sorry, dude...
    rm -f /etc/resolv.conf
    ln -s /etc/ppp/resolv.conf /etc/resolv.conf
#elif test "$DNSTYPE" = "SPECIFY" ; then
    # Sorry, dude...
#    rm -f /etc/resolv.conf
#    echo "nameserver $DNS1" > /etc/resolv.conf
#    if test -n "$DNS2" ; then
#	echo "nameserver $DNS2" >> /etc/resolv.conf
#    fi
#fi
##GMTK: END


# PPPoE invocation
PPPOE_CMD="$PPPOE -p $PPPOE_PIDFILE -I $ETH -T $PPPOE_TIMEOUT -U $PPPOE_SYNC $CLAMPMSS $ACNAME $SERVICENAMEOPT $PPPOE_EXTRA"

##GMTK: DEBUG==""
#if test "$DEBUG" != "" ; then
#    if test "$DEMAND" != "" ; then
#	echo "(Turning off DEMAND for debugging purposes)"
#	DEMAND=""
#    fi
#    echo "* The following section shows the pppd command we will invoke" >> $DEBUG
#    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 "* The following section is an extract from your log." >> $DEBUG
#    echo "* Look for error messages from pppd, such as" >> $DEBUG
#    echo "* a lack of kernel support for PPP, authentication failure" >> $DEBUG
#    echo "* etc." >> $DEBUG
#    if test -f "/var/log/messages" ; then
#	echo "Extract from /var/log/messages" >> $DEBUG
#	grep 'ppp' /var/log/messages | tail -150 >> $DEBUG
#    elif test -f "/var/adm/messages"; then
#	echo "Extract from /var/adm/messages" >> $DEBUG
#	grep 'ppp' /var/adm/messages | tail -150 >> $DEBUG
#    else
#        echo "Can't find messages file (looked for /var/{log,adm}/messages" >> $DEBUG
#    fi
#    date >> $DEBUG
#    echo "---------------------------------------------" >> $DEBUG
#    echo "* The following section is a dump of the packets" >> $DEBUG
#    echo "* sent and received by rp-pppoe.  If you don't see" >> $DEBUG
#    echo "* any output, it's an Ethernet driver problem.  If you only" >> $DEBUG
#    echo "* see three PADI packets and nothing else, check your cables" >> $DEBUG
#    echo "* and modem.  Make sure the modem lights flash when you try" >> $DEBUG
#    echo "* to connect.  Check that your Ethernet card is in" >> $DEBUG
#    echo "* half-duplex, 10Mb/s mode.  If all else fails," >> $DEBUG
#    echo "* try using pppoe-sniff." >> $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 try to"
#    echo "*** figure out what is going on."
#    echo "***"
#    echo "*** Unfortunately, we can NO LONGER accept debugging"
#    echo "*** output for analysis.  Please do not send this to"
#    echo "*** Roaring Penguin; it is too time-consuming for"
#    echo "*** us to deal with all the analyses we have been sent."
#    exit 0
#fi

echo $$ > $PIDFILE

while [ true ] ; do
#    if test "$OVERRIDE_PPPD_COMMAND" != "" ; then
#	$SETSID $OVERRIDE_PPPD_COMMAND &
#	echo "$!" > $PPPD_PIDFILE
#    elif test "$LINUX_PLUGIN" != "" ; then
#	$SETSID $PPPD $PPP_STD_OPTIONS $DEMAND &
#	echo "$!" > $PPPD_PIDFILE
#    else
	$SETSID $PPPD pty "$PPPOE_CMD" \
	    $PPP_STD_OPTIONS \
	    $DEMAND \
	    $PPPD_SYNC &
	echo "$!" > $PPPD_PIDFILE
#    fi
    wait

    if test "$RETRY_ON_FAILURE" = "no" ; then
	exit
    fi

    # Run /etc/ppp/pppoe-lost if it exists
    test -x /etc/ppp/pppoe-lost && /etc/ppp/pppoe-lost

    # Re-establish the connection
    $LOGGER -p daemon.notice \
        "PPPoE connection lost; attempting re-connection."

    # Wait a bit in case a problem causes tons of log messages :-)
    sleep 5
done
