#!/usr/sbin/sh
#
# Copyright (c) 1991, 2012, Oracle and/or its affiliates. All rights reserved.
#

#
# This is third phase of TCP/IP startup/configuration.  This script
# runs after the NIS startup script.  We run things here that may
# depend on NIS maps.
#

. /lib/svc/share/smf_include.sh
. /lib/svc/share/net_include.sh

case "$1" in
'start')
	#
	# In a shared-IP zone we need this service to be up, but all of the
	# work it tries to do is irrelevant (and will actually lead to the
	# service failing if we try to do it), so just bail out. 
	# In the global zone and exclusive-IP zones we proceed.
	#
	smf_configure_ip || exit $SMF_EXIT_OK

	#
	# If nwam (i.e., reactive NCP) is enabled, the network/location
	# service will handle the tasks performed by this service, so just
	# bail out.  For fixed NCP, we proceed.
	#
	ncp_is_fixed `get_active_ncp` || exit $SMF_EXIT_OK

	;; # fall through -- rest of script is the initialization code

'stop')
	exit $SMF_EXIT_OK
	;;

*)
	echo "Usage: $0 { start | stop }"
	exit 1
	;;
esac

# If boot variables are not set, set variables we use
[ -z "$_INIT_UTS_NODENAME" ] && _INIT_UTS_NODENAME=`/usr/bin/uname -n`

#
# update_resolv()
#
# Update the "nameserver" and "domain" entries for /etc/resolv.conf with new
# ones given out by the DHCP server.
#
# The first argument is the dns servers string and should always exist, the
# second is the optional dns domain.
#
update_resolv ()
{
	dnsservers=$1
	dnsdomain=$2

	$SVCCFG -s $DNS_CLIENT_FMRI \
	    setprop config/nameserver = net_address: "( $dnsservers )"
	if [ -n "$dnsdomain" ]; then
		$SVCCFG -s $DNS_CLIENT_FMRI \
		    setprop config/domain = astring: "$dnsdomain"
	else
		$SVCCFG -s $DNS_CLIENT_FMRI delprop config/domain 2>/dev/null
	fi

	$SVCADM refresh $DNS_CLIENT_FMRI	
	# dns/client is disabled in the manifest
	$SVCADM enable -t $DNS_CLIENT_FMRI
}

#
# update_nsswitch()
#
# Append "dns" to the "hosts" entry of /etc/nsswitch.conf if it is not already
# there.
#
update_nsswitch ()
{
	$SVCPROP -cp config/host $NS_SWITCH_FMRI 2>/dev/null | read host
	echo $host | $GREP "dns" >/dev/null
	if [ $? -eq 1 ]; then
		# if "hosts" entry does not exist at all, have "files" too
		if [ -z "$host" ]; then
			host="files dns"
		else
			host="$host dns"
		fi
		$SVCCFG -s $NS_SWITCH_FMRI setprop \
		    config/host = astring: \"$host\"
		$SVCADM refresh $NS_SWITCH_FMRI
	fi
}

#
# If our network configuration strategy is DHCP, check for DNS
# configuration parameters obtained from the DHCP server.
#
# Script execution starts here.
#
smf_netstrategy

if [ "$_INIT_NET_STRATEGY" = "dhcp" ]; then

	dnsservers=`/usr/sbin/dhcpinfo DNSserv`
	dnsdomain=`/usr/sbin/dhcpinfo DNSdmain`

	if [ -n "$dnsservers" ]; then
		# add settings retrieved from DHCP server to /etc/resolv.conf
		update_resolv "$dnsservers" "$dnsdomain"

		# add "dns" to /etc/nsswitch.conf, if it isn't already there
		update_nsswitch
	fi
fi

exit $SMF_EXIT_OK