# Copyright (c) 2004-2005 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header:  $

# Contributed by Alin Nastac (mrness@gentoo.org)

# char* pppoe_provides(void)
#
# Returns a string to change module definition for starting up
pppoe_provides() {
	echo "pppoe"
}

# void pppoe_depend(void)
#
# Sets up the dependancies for the module
pppoe_depend() {
	after interface
	before dhcp
}

# bool pppoe_check_installed(void)
#
# Returns 1 if pppd is installed, otherwise 0
pppoe_check_installed() {
	if [[ ! -x /usr/sbin/pppd ]]; then
		eerror "For PPPoE support, emerge net-dialup/ppp"
		return 1
	fi
	return 0
}

# bool pppoe_check_depends(void)
#
# Checks to see if we have the needed functions
pppoe_check_depends() {
	local f

	for f in interface_variable; do
		[[ $( type -t ${f} ) == function ]] && continue
		eerror "pppoe: missing required function ${f}\n"
		return 1
	done

	return 0
}

# bool pppoe_start(char *iface)
#
# Start PPPoE on an interface by calling pppd
#
# Returns 0 (true) when successful, non-zero otherwise
pppoe_start() {
	local iface=${1} user ifvar=$( interface_variable ${1} ) cmdline=/usr/sbin/pppd

	# Might or might not be set in conf.d/net
	local user password ondemand_idletime echo_interval echo_failure mtu service access_concentrator
	eval user=\"\$\{pppoe_user_${ifvar}\}\"
	eval password=\"\$\{pppoe_password_${ifvar}\}\"
	eval ondemand_idletime=\"\$\{pppoe_ondemand_idletime_${ifvar}\}\"
	eval echo_interval=\"\$\{pppoe_echo_interval_${ifvar}\}\"
	eval echo_failure=\"\$\{pppoe_echo_failure_${ifvar}\}\"
	eval mtu=\"\$\{pppoe_mtu_${ifvar}\}\"
	eval service=\"\$\{pppoe_service_${ifvar}\}\"
	eval access_concentrator=\"\$\{pppoe_access_concentrator_${ifvar}\}\"
	
	#Add/update info in PAP/CHAP secrets files
	if [[ -n "${password}" ]]; then
		if ! update_secrets_file "/etc/ppp/pap-secrets" "${user}" "${iface}" "${password}" ; then
			eerror "Failed to update PAP secrets file"
			return 1
		fi
		if ! update_secrets_file "/etc/ppp/chap-secrets" "${user}" "${iface}" "${password}" ; then
			eerror "Failed to update CHAP secrets file"
			return 1
		fi
	fi

	#Load pppoe module (if compiled as module)
	modprobe pppoe &>/dev/null

	einfo "Starting PPPoE for ${iface}"

	[[ -n ${ondemand_idletime} ]] && \
		cmdline="${cmdline} demand idle ${ondemand_idletime} 10.112.112.112:10.112.112.113 \
				ipcp-accept-remote ipcp-accept-local connect true"
	cmdline="${cmdline} plugin rp-pppoe.so"
	[[ -n ${servicename} ]] && \
		cmdline="${cmdline} rp_pppoe_service ${servicename}"
	[[ -n ${access_concentrator} ]] && \
		cmdline="${cmdline} rp_pppoe_ac ${access_concentrator}"
	cmdline="${cmdline} ${iface} remotename ${iface} linkname ${iface} ipparam ${iface} \
			hide-password persist maxfail 0  default-asyncmap noipdefault noauth defaultroute \
			noaccomp noccp nobsdcomp nodeflate nopcomp novj novjccomp \
			lcp-echo-interval ${echo_interval:-15} lcp-echo-failure ${echo_failure:-3} \
			mtu ${mtu:-1492} mru ${mtu:-1492}"
	[[ -n ${user} ]] && \
		cmdline="${cmdline} user ${user}"
	
	${cmdline} &>/dev/null
	eend $?
}

# bool pppoe_stop(char *iface)
#
# Stop PPPoE link by killing the associated pppd process
#
# Returns 0 (true) when there appears to be an PPPoE interface to stop,
# and we attempted to stop it. Returns non-zero when there was
# nothing to stop.
pppoe_stop() {
	local iface=${1} cfgfile pidfile=/var/run/ppp-${iface}.pid

	[[ ! -f ${pidfile} ]] && return 1

	local pid=$(head -n 1 ${pidfile})
	einfo "Stopping PPPoE for ${iface}"
	kill -s HUP ${pid} && \
		process_finished ${pid} /usr/sbin/pppd
	eend $?

	return 0  # we did *attempt* to stop adsl
}