#!/sbin/runscript
# Copyright 1999-2004 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: $

# Kernel-space driver for Alcatel SpeedTouch modems (for >=2.6.10 kernels)

get_ip_addr() {
	IP_ADDR=`ifconfig ppp0 2>/dev/null | grep -F "inet ad" | cut -f2 -d":" | cut -f1 -d" "`
}

depend() {
	need localmount modules net.nas0
	before ntp-client ntpd

	# There is more configuration required here, as mentioned at http://www.linux-usb.org/SpeedTouch/gentoo/index.html
	# /etc/init.d/net.nas0 needs to be set up, for the Ethernet interface, from the br2684ctl ebuild
}

start() {
	ebegin "Starting SpeedTouch ADSL modem"

	if [ -e "/var/run/ppp0.pid" ]; then
		eend 1 "ppp0 is already running"
		return 1
	fi

	# PEER is defined in /etc/conf.d/speedtouch
	if [ ! -f "/etc/ppp/peers/$PEER" ]; then
		eend 1 "/etc/ppp/peers/$PEER does not exist"
		return 1
	fi

	# Skip USB check, since the modem is not connected via USB.

	# PPPoE modules
	modprobe -q br2684
	modprobe -q pppoe

	# Reluctant pause, to stop the kernel driver from executing this script twice,
	# and populating /var/log/messages with errors like:
	# "connect(0.38): No such device".
	# There would normally be a pause of several seconds anyway,
	# For the firmware to load, and an initial connection made.
	sleep 8

	# Check that the firmware is loading.
	local SYNC=""
	local i=0
	while [ 1 ]; do
		SYNC=`dmesg | grep 'ADSL line is up'`
		if [ ! -z "${SYNC}" ]; then
			# Firmware is loading, so continue
			break
		fi
		if [ $i -ge ${FIRMWARE_TIMEOUT} ]; then
			# Timed out
			eend 1 "Timeout waiting for firmware loading"
			return 1
		fi
		sleep 2
		i=$[$i+2]
	done

	start-stop-daemon --start -p /var/run/ppp0.pid -x /usr/sbin/pppd call $PEER

	if [ ${WAIT_FOR_PPP} == "yes" ]; then
		# Assume failure until an IP address is seen
		local RETCODE=1
		# Wait for an IP address
		i=0
		while [ 1 ]; do	
			get_ip_addr
			if [ ${IP_ADDR} ]; then
				# ppp0 has an IP address - success
				RETCODE=0
				# Wait for the connection to settle
				sleep 4
				break
			fi
			if [ $i -ge ${PPP_TIMEOUT} ]; then
				# Timed out
				break
			fi
			sleep 2
			i=$[$i+2]
		done
		eend ${RETCODE}
	else
		eend $?
	fi
}

stop() {
	ebegin "Stopping SpeedTouch ADSL modem"
	start-stop-daemon --stop -p /var/run/ppp0.pid -n pppd
	eend $?
}