#!/sbin/sh

#

# CDDL HEADER START

#

# The contents of this file are subject to the terms of the

# Common Development and Distribution License (the "License").

# You may not use this file except in compliance with the License.

#

# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE

# or http://www.opensolaris.org/os/licensing.

# See the License for the specific language governing permissions

# and limitations under the License.

#

# When distributing Covered Code, include this CDDL HEADER in each

# file and include the License file at usr/src/OPENSOLARIS.LICENSE.

# If applicable, add the following below this CDDL HEADER, with the

# fields enclosed by brackets "[]" replaced with your own identifying

# information: Portions Copyright [yyyy] [name of copyright owner]

#

# CDDL HEADER END

#

#

# Copyright (c) 2011, 2016, Oracle and/or its affiliates. All rights reserved.

#

. /lib/svc/share/smf_include.sh

. /lib/svc/share/net_include.sh

SVCPROP=/usr/bin/svcprop

CHMOD=/usr/bin/chmod

CHOWN=/usr/bin/chown

TOUCH=/usr/bin/touch

ID=/usr/bin/id

DHCPD_IPV4="svc:/network/dhcp/server:ipv4"

DHCPD_IPV6="svc:/network/dhcp/server:ipv6"

DHCPRELAY_IPV4="svc:/network/dhcp/relay:ipv4"

DHCPRELAY_IPV6="svc:/network/dhcp/relay:ipv6"

DHCPD_BIN="/usr/lib/inet/dhcpd"

DHCPRELAY_BIN="/usr/lib/inet/dhcrelay"

#

# dhcpd/dhcprelay can run in a global or exclusive-stack zone only

#

smf_configure_ip || exit $SMF_EXIT_OK

if [ -z $SMF_FMRI ]; then

	echo "SMF framework variables are not initialized."

	exit $SMF_EXIT_ERR

fi

#

# get_prop fmri propname

#

get_prop () {

	VALUE="`$SVCPROP -cp config/$1 $SMF_FMRI 2>/dev/null`"

	# Empty astring_list values show up as "" - do not return this.

	if [ "$VALUE" != "\"\"" ]; then

		echo $VALUE

	fi

}

errlog () {

	echo $1 >&2

}

get_common_options() {

	#

	# get debug property value 

	#

	if [ "`get_prop debug`" = "true" ]; then

		DEBUG="-d"

	else

		DEBUG="-q"

	fi

	export OPTIONS="$OPTIONS $DEBUG"

	return 0

}

#

# expand_prop "prop_name" "var_name" [ argflag ]

#

#     prop_name		FMRI property name

#     var_name		variable where result is stored; initialized

#			to ""

#     argflag		The flag to be prepended to each property

#			value; optional argument

#

# This function will retrieve the properties for "prop_name" via a call

# to get_prop(). It will split-up the property values; it assumes that

# the delimiter is whitespace. It will then prepend "argflag" to each

# property value. The results will be stored in "var_name" which is

# passed by reference.

#

# Return values:

#

#     0			Success

#     1			Failure

#

expand_prop() {

	if [ $# -lt 2 ] || [ -z $2 ]; then

		errlog "Internal error - expand_prop() has incorrect arguments"

		return 1

	fi

	prop_name=$1

	typeset -n var_name=$2

	argflag="$3"

	prop_values="`get_prop $prop_name`"

	if [  -z "$prop_values" ]; then

		errlog "The property, \"${prop_name}\", is empty"

		return 1

	fi

	var_name=""

	for item in `IFS= ; set -- $prop_values; echo $@`; do

		var_name="$var_name $argflag $item"

	done

	return 0

}

get_dhcpd_options() {

	# get listen_ifname property value.

	LISTENIFNAMES="`get_prop listen_ifnames`"

	#

	# get common config file properties

	#

	CONFIGFILE=`get_prop config_file`

	if [ -z "$CONFIGFILE" ]; then

		errlog "No config_file specified, exiting"

		return 1

	fi

	if [ ! -f "$CONFIGFILE" ]; then

		errlog "Required config_file $CONFIGFILE not found, exiting"

		return 1

	fi

	#

	# If a leasefile does not exist, create an empty file.

	#

	LEASEFILE=`get_prop lease_file`

	if [ -z "$LEASEFILE" ]; then

		errlog "No lease_file specified, exiting"

		return 1

	fi

	LEASEFILE_PERMS="u=rw,go=r"

	if [ ! -f "$LEASEFILE" ]; then

		$TOUCH $LEASEFILE

		$CHMOD $LEASEFILE_PERMS $LEASEFILE

	fi

	if [ ! -w "$LEASEFILE" ]; then

		errlog "Lease file '$LEASEFILE' is not writable. You should:"

		errlog "$CHOWN $($ID -u -n) '$LEASEFILE'"

		errlog "$CHMOD $LEASEFILE_PERMS '$LEASEFILE'"

		return 1

	fi

	export OPTIONS="$OPTIONS -cf $CONFIGFILE -lf $LEASEFILE $LISTENIFNAMES"

	return 0

}

get_dhcprelay_options_v4() {

	#

	# Get append_agent_option V4 property value 

	#

	if [ "`get_prop append_agent_option`" = "true" ]; then

		APPEND="-a -m append"

	else

		APPEND=""

	fi

	#

	# get listen_ifname property value and modify it.  

	# If listen_ifnames property value is "e1000g01 iprb0" then the

	# command line option will look like  "-i e1000g0 -i iprb0"

	#

	IIFLIST=

	expand_prop listen_ifnames IIFLIST -i || return $?

	#

	# Get servers  V4 property value - command line option will look

	# like  "1.2.3.5" "4.5.6.7".

	#

	# NOTE: By default server property value is empty. User must

	# first specify a server using svccfg/setprop command

	# before enabling service.

	#

	DHCPSERVERS=`get_prop servers`

	if [  -z "$DHCPSERVERS" ]; then

		errlog 'Must specify at least one "servers" property value, exiting'

		return 1

	fi

	export OPTIONS="$OPTIONS -4 $APPEND $IIFLIST $DHCPSERVERS"

	return 0

}

get_dhcprelay_options_v6() {

	#

	# Get receivelinks  V6 property value and modify it:

	# Given property values of "1.2.3.4%bge0#1 bge2,1.2.3.4%iprb",

	# the command line option will look like  "-l 1.2.3.4%bge0#1 -l

	# bge2 -l 1.2.3.4%iprb".

	#

	# NOTE: By default receivelinks value is empty. User must

	# first specify a server using svccfg/setprop command

	# before enabling service.

	#

	IRECVLINKS=

	expand_prop receive_query_links IRECVLINKS -l || return $?

	#

	# Get forwardlinks V6 property value and modify it:

	# Given forward_query_links property value is "1.2.3.4%bge0 bge2,"

	# then the command line option will look like  "-u 1.2.3.4%bge0 -u

	# bge2"

	#

	# NOTE: By default forwardlinks value is empty. User must

	# first specify a server using svccfg/setprop command

	# before enabling service.

	#

	IFWDLINKS=

	expand_prop forward_query_links IFWDLINKS -u || return $?

	export OPTIONS="$OPTIONS -6 $IRECVLINKS $IFWDLINKS"

}

export OPTIONS="--no-pid"

case "$SMF_FMRI" in

"$DHCPD_IPV4"|"$DHCPD_IPV6")

	# get omapi_conn_limit property value.

	export OMAPI_CONN_LIMIT=`get_prop omapi_conn_limit`

	get_common_options

	if [ "$?" != "0" ]; then

		exit $SMF_EXIT_ERR_CONFIG

	fi

	get_dhcpd_options

	if [ "$?" != "0" ]; then

		exit $SMF_EXIT_ERR_CONFIG

	fi

	if [ "$SMF_FMRI" = "$DHCPD_IPV4" ]; then

		OPTIONS="-4 $OPTIONS"

	else

		OPTIONS="-6 $OPTIONS"

	fi

	export EXECFILE=$DHCPD_BIN

	;;

$DHCPRELAY_IPV4)

	get_common_options

	if [ $? != "0" ]; then

		exit $SMF_EXIT_ERR_CONFIG

	fi

	get_dhcprelay_options_v4

	if [ $? != "0" ]; then

		exit $SMF_EXIT_ERR_CONFIG

	fi

	export EXECFILE=$DHCPRELAY_BIN

	;;

$DHCPRELAY_IPV6)

	get_common_options

	if [ $? != "0" ]; then

		exit $SMF_EXIT_ERR_CONFIG

	fi

	get_dhcprelay_options_v6

	if [ $? != "0" ]; then

		exit $SMF_EXIT_ERR_CONFIG

	fi

	export EXECFILE=$DHCPRELAY_BIN

	;;

*)

        echo "isc-dhcp must be invoked from within SMF"

        exit $SMF_EXIT_ERR_FATAL

	;;

esac

# Now start the daemon

if [ "$DEBUG" = "-d" ]; then

	$EXECFILE $OPTIONS &

else

	$EXECFILE $OPTIONS

fi

if [ "$?" != "0" ]; then

	exit $SMF_EXIT_ERR_FATAL

fi

exit $SMF_EXIT_OK