# DHCPv6

# DHCPv6 can be provided by dhclient

#

# dhclient: emerge net-misc/dhcp

#

# If you have more than one DHCP client installed, you should probably

# explicitly use 'dhclient' to use dhclient for both DHCP and DHCPv6,

# otherwise the default DHCP client will be used.  dhcpcd has some stateless

# IPv6 autoconfiguration support which may clash with DHCPv6.

#modules="dhclient" # to select dhclient over dhcpcd

# Regardless of which DHCP client you prefer, you configure them the

# same way using one of following depending on which interface modules

# you're using.

#config_eth0="dhcpv6"

# You can also use both DHCP and DHCPv6 on a dual-stack network:

#config_eth0="dhcp

#dhcpv6"

# To pass runtime arguments to dhclient for DHCPv6, you do it similarly to

# setting runtime arguments for DHCP.  Note that you can set options for

# DHCPv6 separately or in addition the dhclient arguments for DHCP.

#dhclientv6_eth0="..." # options for DHCPv6 only

#dhclient_eth0='..."   # options for DHCP (also for DHCPv6 when no

#                      # dhclientv6_eth0 is defined)

# GENERIC DHCPv6 OPTIONS

# Set generic DHCPv6 options just as with generic DHCP options.

#dhcpv6_eth0="release nodns nontp nonis nogateway nosendhost"

# If no generic DHCPv6 options are set, the default is to fall back to the

# DHCP generic options.

#-----------------------------------------------------------------------------

_show_address6()

{

	einfo "received address $(_get_inet6_address "${IFACE}")"

}

# Copyright (c) 2007-2008 Roy Marples <roy@marples.name>

# Released under the 2-clause BSD license.

dhclientv6_depend()

{

	after interface

	program start /sbin/dhclient

	provide dhcpv6

}

_config_vars="$_config_vars dhcp dhclient dhcpv6 dhclientv6"

dhclientv6_start()

{

	local args= opt= opts= pidfile="/var/run/dhclientv6-${IFACE}.pid"

	local sendhost=true dconf=

	# Get our options

	# These options only work in Gentoo, and maybe RedHat

	eval args=\$dhclientv6_${IFVAR}

	[ -z "${args}" ] && eval args=\$dhclient_${IFVAR}

	eval opts=\$dhcpv6_${IFVAR}

	[ -z "${opts}" ] && opts=${dhcpv6}

	[ -z "${opts}" ] && eval opts=\$dhcp_${IFVAR}

	[ -z "${opts}" ] && opts=${dhcp}

	for opt in ${opts}; do

		case "${opt}" in

			nodns) args="${args} -e PEER_DNS=no";;

			nontp) args="${args} -e PEER_NTP=no";;

			nogateway) args="${args} -e PEER_ROUTERS=no";;

			nosendhost) sendhost=false;;

		esac

	done

	# Add our route metric

	[ "${metric:-0}" != "0" ] && args="${args} -e IF_METRIC=${metric}"

	if ${sendhost}; then

		local hname="$(hostname)"

		if [ "${hname}" != "(none)" -a "${hname}" != "localhost" ]; then

			dhconf="${dhconf} interface \"${IFACE}\" {"

			dhconf="${dhconf} send fqdn.fqdn \"${hname}\";"

			dhconf="${dhconf} send fqdn.encoded on;"

			dhconf="${dhconf} send fqdn.server-update on;"

			dhconf="${dhconf} send fqdn.no-client-update on;"

			dhconf="${dhconf}}"

		fi

	fi

	# Bring up DHCP for this interface

	ebegin "Running dhclient -6"

	echo "${dhconf}" | start-stop-daemon --start --exec /sbin/dhclient \

		--pidfile "${pidfile}" \

		-- -6 ${args} -q -1 -pf "${pidfile}" "${IFACE}"

	eend $? || return 1

	_show_address6

	return 0

}

dhclientv6_stop()

{

	local pidfile="/var/run/dhclientv6-${IFACE}.pid" opts=

	[ ! -f "${pidfile}" ] && return 0

	# Get our options

	if [ -x /sbin/dhclient ]; then

		eval opts=\$dhcp_${IFVAR}

		[ -z "${opts}" ] && opts=${dhcp}

	fi

	ebegin "Stopping dhclient -6 on ${IFACE}"

	case " ${opts} " in

		*" release "*) dhclient -6 -q -r -pf "${pidfile}" "${IFACE}";;

		*)

			start-stop-daemon --stop --quiet \

				--exec /sbin/dhclient --pidfile "${pidfile}"

			;;

	esac

	eend $?

}

	local fn="$1"

_get_inet_addresses()

{

	_get_addresses_fn _get_inet_address

}

_get_inet6_addresses()

{

	_get_addresses_fn _get_inet6_address

}

_get_inet6_address()

{

	set -- $(_get_inet6_addresses)

	[ $# = "0" ] && return 1

	echo "$1"

}