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

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

# Fix any potential localisation problems
# Note that LC_ALL trumps LC_anything_else according to locale(7)
pump() {
	LC_ALL=C /sbin/pump "$@"
}

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

# void pump_depend(void)
#
# Sets up the dependancies for the module
pump_depend() {
	after interface
}

# bool pump_check_installed(void)
#
# Returns 1 if pump is installed, otherwise 0
pump_check_installed() {
	[[ -x /sbin/pump ]] && return 0
	${1:-false} && eerror "For DHCP (pump) support, emerge net-misc/pump"
	return 1
}

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

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

	return 0
}

# char* pump_get_vars(char *interface)
#
# Returns a string spaced with possible user set
# configuration variables
pump_get_vars() {
	echo "pump_${1} dhcp_${1}"
}

# bool pump_stop(char *iface)
#
# Stop pump on an interface by calling pumpcd -z $iface
#
# Always returns 0
pump_stop() {
	local iface=${1} count e
	
	pump_check_installed || return 0

	# We check for a pump process first as querying for status
	# causes pump to spawn a process
	ps -C pump &>/dev/null || return 0

	e=$( pump --status --interface ${iface} 2>${devnull} | grep ${iface})
	[[ -z ${e} ]] && return 1
	
	ebegin "Stopping pump on ${iface}"
	for ((count = 0; count < 9; count = count + 1)); do
		e=$( pump --release --interface ${iface} 2>${devnull} )
		[[ -z ${e} ]] && break
		sleep 1
	done
	[[ ${count} -lt 9 ]]
	eend $? "Timed out"

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

# bool pump_start(char *iface)
#
# Start pump on an interface by calling pumpcd $iface $options
#
# Returns 0 (true) when a dhcp address is obtained, otherwise
# the return value from pump
pump_start() {
	local iface=${1} opts hostname dhcp
	local ifvar=$( interface_variable ${iface} )

	interface_exists ${iface} true || return 1

	eval opts=\"\$\{pump_${ifvar}\}\"

	# Map some generic options to pump
	eval dhcp=\" \$\{dhcp_${ifvar}\} \"
	[[ ${dhcp} == *' nodns '* ]] && opts="${opts} --no-dns"
	[[ ${dhcp} == *' nogateway '* ]] && opts="${opts} --no-gateway"

	# We transmit the hostname by default
	if [[ ${dhcp} != *' nosendhost '* && ${opts} != *'-h '* && ${opts} != '*--hostname='* ]]; then
		hostname=$( hostname )
		[[ -n ${hostname} && ${hostname} != "(none)" && ${hostname} != localhost ]] \
			&& opts="--hostname=${hostname} ${opts}"
	fi

	# Bring up DHCP for this interface (or alias)
	ebegin "Running pump"
	pump ${opts} --win-client-ident --interface ${iface} 2>${devnull}
	eend $? || return $?

	# pump succeeded, show address retrieved
	local addr=$( interface_get_address ${iface} )
	einfo "${iface} received address ${addr}"

	eval peer=\"\$\{dhcp_ntp_${iface}\}\"
	[[ -z ${peer} ]] && eval peer=\"\$\{dhcp_ntp\}\"
	if [[ ${peer} != no ]]; then
		export ntpsrv=$( pump -i ${iface} --status 2>/dev/null | awk '/Ntpservers/ {print $2}' 2>/dev/null )
		source ${MODULES_DIR}/helpers.d/config-system
		config_system
	fi

	return 0
}
