#!/bin/sh
#
########################################################################
# Begin
#
# Description : A collection of functions for the IPFire network scripts
#
# Authors     : IPFire Development Team <developers@ipfire.org>
#
# Version     : 01.00
#
# Notes       : 
#
########################################################################

. /etc/sysconfig/rc
. $rc_functions


eval $(/usr/local/bin/readhash /var/ipfire/ethernet/settings)
eval $(/usr/local/bin/readhash /var/ipfire/dns/settings)

dhcpcd_get_pid() {
		# This function returns the pid of a dhcpcd by a given
		# network device, if a pidfile exists.

		local device="$1"
		local pidfile="/var/run/dhcpcd-${device}.pid"

		# Check if a pid file exists.
		if [ -f "${pidfile}" ] ; then

			# Get the pid from the file.
			local pid="$(<"${pidfile}")"

			echo "${pid}"
		fi
}

dhcpcd_is_running() {
	# This functions checks if a dhcpcd is running by a given pid.

	local pid="$1"

	# Check if a dhcpcd is running.
	if [ -n "${pid}" -a -d "/proc/${pid}" ]; then
		# Return "0" (True) if a dhcpcd is running.
		return 0
	fi

	# Return 1 (False) no dhcpcd is running.
	return 1
}

dhcpcd_start() {
	# This function will start a dhcpcd on a speciefied device.

	local device="$1"
	local dhcp_start=""

	boot_mesg -n "Starting dhcpcd on the ${device} interface..."

	# Check if a dhcpcd is already running.
	local pid="$(dhcpcd_get_pid "${device}")"

	if  dhcpcd_is_running "${pid}"; then
		boot_mesg "dhcpcd already running!" ${WARNING}
		echo_warning
		exit 2
	fi

	# Check if a DHCP hostname has been set.
	if [ -n "${RED_DHCP_HOSTNAME}" ]; then
		dhcp_start+="-h ${RED_DHCP_HOSTNAME}"
	fi

	# Start dhcpcd.
	/sbin/dhcpcd "${device}" "${dhcp_start}" >/dev/null 2>&1
	ret="$?"

	if [ "${ret}" -eq 0 ]; then
		. /var/ipfire/dhcpc/dhcpcd-"${device}".info
		echo ""
		echo_ok
		boot_mesg "           DHCP Assigned Settings for ${device}:"
		boot_mesg_flush
		boot_mesg "           IP Address:      $ip_address"
		boot_mesg_flush

		if [ -n "${RED_DHCP_HOSTNAME}" ]; then
			boot_mesg "           Hostname:        $RED_DHCP_HOSTNAME"
			boot_mesg_flush
		fi

		boot_mesg "           Subnet Mask:     $subnet_mask"
		boot_mesg_flush
		boot_mesg "           Default Gateway: $routers"
		boot_mesg_flush
		boot_mesg "           DNS Server:      $domain_name_servers"
		boot_mesg_flush
	else
		echo ""
		$(exit "${ret}")
 		evaluate_retval
	fi
}

dhcpcd_stop() {
	# This function stops a previously started dhcpcd on a given device.

	local device="$1"
	local dhcp_stop="-k"
	local leaseinfo="/var/ipfire/dhcpc/dhcpcd-${device}.info"

	boot_mesg -n "Stopping dhcpcd on the ${device} interface..."

	# Check if a dhcpcd is running.
	local pid="$(dhcpcd_get_pid "${device}")"

	if ! dhcpcd_is_running "${pid}"; then
		boot_mesg "dhcpcd not running!" ${WARNING}
		echo_warning
		exit 1
	fi

	# Check if we got a valid lease.
	if [ -e $leaseinfo ]; then
		. $leaseinfo
		if [ "$dchp_lease_time" = "4294967295" ]; then
			# do nothing, just echo ok
			echo_ok
		else
			# Stop dhcpcd.
			/sbin/dhcpcd "${device}" "${dhcp_stop}" &> /dev/null
			ret="$?"

			# Wait until dhcpd has stopped.
			while [ -d "/proc/${pid}" ]; do
				sleep 1
			done

			# Display console message, depended on the exit code
			# of the stopped dhcpcd.
			if [ "${ret}" -eq 0 ]; then
				echo_ok
			elif [ "${ret}" -eq 1 ]; then
				boot_mesg "failed to stop dhcpcd!" ${WARNING}
				echo_warning
			else
				echo_failure
			fi
		fi
	fi
}