#!/bin/bash
# Copyright (c) 2004-2005 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2

# Contributed by Roy Marples (uberlord@gentoo.org)

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

# void netplugd_depend(void)
#
# Sets up the dependancies for the module
netplugd_depend() {
	after macnet
	before interface
}

# bool netplugd_check_installed(void)
#
# Returns 0 if netplug is installed, otherwise 1
netplugd_check_installed() {
	if [[ ! -x /sbin/netplugd ]]; then
		${1:-false} && eerror "For netplug support, emerge sys-apps/netplug"
		return 1
	fi
	return 0
}

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

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

	return 0
}

# bool netplugd_pre_start(char *interface)
#
# Start netplug on an interface
netplugd_pre_start() {
	local iface="$1" timeout i
	local pidfile="/var/run/netplugd.${iface}.pid"

	# We don't start netplug if we're being called from the background
	${IN_BACKGROUND} && return 0

	interface_exists "${iface}" || return 0

	# We need a valid MAC address
	# It's a basic test to ensure it's not a virtual interface
	local mac=$(interface_get_mac_address "${iface}")
	if [[ -z ${mac} ]]; then
		vewarn "netplug only works on interfaces with a valid MAC address"
		return 0
	fi

	# We don't work on bridges
	if [[ $(type -t bridge_exists) == "function" ]]; then
		if bridge_exists "${iface}"; then
			veinfo "netplug does not work on bridges"
			return 0
		fi
	fi

	# We don't work on tun/tap interfaces
	if [[ $(type -t tuntap_exists) == "function" ]]; then
		if tuntap_exists "${iface}"; then
			veinfo "netplug does not work on tun/tap interfaces"
			return 0
		fi
	fi

	# We don't work on wirelesss interfaces
	if [[ $(type -t wireless_check_extensions) == "function" ]]; then
		if wireless_check_extensions "${iface}"; then
			veinfo "netplug does not work on wireless interfaces"
			return 0
		fi
	fi

	ebegin "Starting netplug on ${iface}"

	# We need the interface up for netplug to listen to netlink events
	interface_up "${iface}"

	# Mark the us as inactive so netplug can restart us
	mark_service_inactive "net.${iface}"

	# Start netplug
	start-stop-daemon --start --exec /sbin/netplugd \
		--pidfile "${pidfile}" \
		-- -i "${iface}" -P -p "${pidfile}" -c /dev/null
	eend "$?" || return 1

	eindent

	eval timeout=\"\$\{plug_timeout_${ifvar}\:-10}\"
	if [[ ${timeout} == "0" ]]; then
		ewarn "WARNING: infinite timeout set for ${iface} to come up"
	elif [[ ${timeout} -lt 0 ]]; then
		ewarn "WARNING: negative timeout set for ${iface}"
		exit 0
	fi

	veinfo "Waiting for ${iface} to be marked as started"

	i=0
	while true ; do
		if service_started "net.${iface}"; then
			local addr=$( interface_get_address "${iface}" )
			einfo "${iface} configured with address ${addr}"			
			exit 0
		fi
		sleep 1
		(( i++ ))
		[[ ${i} == "${timeout}" || ${i} -gt "${timeout}" ]] && break
	done

	eend 1 "Failed to configure ${iface} in the background"
	exit 0
}

# bool netplugd_post_stop(char *iface)
#
# Stops netplug on an interface
# Returns 0 (true) when successful, non-zero otherwise
netplugd_post_stop() {
	${IN_BACKGROUND} && return 0
	local iface="$1"
	local pidfile="/var/run/netplugd.${iface}.pid"

	[[ ! -e ${pidfile} ]] && return 0
	
	ebegin "Stopping netplug on ${iface}"
	start-stop-daemon --stop --exec /sbin/netplugd \
		--pidfile "${pidfile}"
	eend $?
}

# vim:ts=4