#!/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) 2010, Oracle and/or its affiliates. All rights reserved.
#

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

# FMRI consts
AUTOFS_FMRI="svc:/system/filesystem/autofs"
DNS_CLIENT_FMRI="svc:/network/dns/client"
IPSEC_IKE_FMRI="svc:/network/ipsec/ike"
IPSEC_POLICY_FMRI="svc:/network/ipsec/policy"
IPFILTER_FMRI="svc:/network/ipfilter:default"
LDAP_CLIENT_FMRI="svc:/network/ldap/client"
LOCATION_FMRI="svc:/network/location:default"
MAPID_FMRI="svc:/network/nfs/mapid:default"
NIS_CLIENT_FMRI="svc:/network/nis/client"
NWAM_FMRI="svc:/network/physical:nwam"

# commands
CP=/usr/bin/cp
DHCPINFO=/sbin/dhcpinfo
DOMAINNAME=/usr/bin/domainname
GREP=/usr/bin/grep
LDAPCLIENT=/usr/sbin/ldapclient
MKDIR=/usr/bin/mkdir
MV=/usr/bin/mv
NAWK=/usr/bin/nawk
NWAMADM=/usr/sbin/nwamadm
NWAMCFG=/usr/sbin/nwamcfg
RM=/usr/bin/rm
SED=/usr/bin/sed
SVCADM=/usr/sbin/svcadm
SVCCFG=/usr/sbin/svccfg
SVCPROP=/usr/bin/svcprop
TOUCH=/usr/bin/touch

# Path to directories
ETC_DEFAULT_DOMAIN=/etc/defaultdomain
NIS_BIND_PATH=/var/yp/binding
LEGACY_LOC_PATH=/etc/nwam/loc/Legacy
USER_LOC_PATH=/etc/nwam/loc/User
SCRIPT_PATH=/etc/svc/volatile/nwam

#
# echoes DHCP controlled interfaces separated by commas
#
# Don't parse the output of ifconfig(8) because interfaces that haven't
# acquired a DHCP lease also have the DHCP flag set.
#
get_dhcp_interfaces () {
	#
	# 1. parse netstat(8) output for v4 interfaces in BOUND
	#    or INFORMATION state
	# 2. make a space-separated list of interface names
	#
	netstat -D -f inet | $NAWK '
	    $2 ~ /BOUND/ { printf "%s ", $1 }
	    $2 ~ /INFORMATION/ { printf "%s ", $1 }'
}

#
# get_dhcpinfo <code/identifier>
#
# echoes the value received through each interface controlled by DHCP;
# multiple values are echoed as a space-separated list
#
# returns:
#	0 => property is set
#	1 => property is not set
#
get_dhcpinfo () {
	code=$1

	# Get all interfaces with DHCP control, IFS is " "
	interfaces=`get_dhcp_interfaces`

	info=""
 	for intf in $interfaces; do
		val=`$DHCPINFO -i $intf $code`
		if [ $? -eq 0 ]; then
			if [ "$info" = "" ]; then
				info="$val"
			else
				info="$info $val"
			fi
		fi
 	done
	echo $info
}

#
# set_smf_prop <fmri> <property name> <property value>
#
set_smf_prop () {
	$SVCCFG -s $1 setprop $2 = astring: "$3" && return
}

#
# refresh_svc <fmri>
#
# Refreshes the service.
#
refresh_svc () {
	$SVCADM refresh $1
}

#
# restart_svc <fmri>
#
# Restarts the service.
#
restart_svc () {
	$SVCADM restart $1
}

#
# start_svc <fmri>
#
# Starts the service.  If the service is already enabled, restarts it.  If
# it is not enabled, temporarily enables it.
#
start_svc () {
	if service_is_enabled $1; then
		$SVCADM restart $1
	else
		$SVCADM enable -t $1
	fi
}

#
# stop_svc <fmri>
#
# Temporarily disables the service.
#
stop_svc () {
	$SVCADM disable -t $1
}

#
# copy_default <dir> <file>
#
# Copies <dir>/<file>.dfl to <dir>/<file>
#
copy_default () {
	$CP -p $1/$2.dfl $1/$2
}

#
# do_dns <location>
#
# Installs DNS information on /etc/resolv.conf for location
#
# Returns 0 on success, 1 on failure
#
do_dns () {
	loc=$1
	file=/etc/resolv.conf

	# Write out to temporary file first
	$TOUCH $file.$$

	DNS_CONFIGSRC=`nwam_get_loc_list_prop $loc dns-nameservice-configsrc`
	if [ -z "$DNS_CONFIGSRC" ]; then
		echo "missing 'dns-nameservice-configsrc' property for '$loc'"
		return 1
	fi

	for configsrc in $DNS_CONFIGSRC; do
		case "$configsrc" in
		'manual')
			DNS_SERVERS=`nwam_get_loc_list_prop $loc \
			    dns-nameservice-servers`
			if [ -z "$DNS_SERVERS" ]; then
				echo "DNS nameserver not set for '$loc'"
				return 1
			fi
			DNS_DOMAIN=`nwam_get_loc_prop $loc \
			    dns-nameservice-domain`
			DNS_SEARCH=`nwam_get_loc_list_prop $loc \
			    dns-nameservice-search`
			;;
		'dhcp')
			DNS_SEARCH=`get_dhcpinfo DNSdmain`
			DNS_SERVERS=`get_dhcpinfo DNSserv`
			# Use first search list entry as default domain
			set -- $DNS_SEARCH
			DNS_DOMAIN=$1
			;;
		'*')
			echo "Unrecognized DNS configsrc ${configsrc}; ignoring"
			;;
		esac

		# Write DNS settings
		if [ -n "$DNS_DOMAIN" ]; then
			echo "$DNS_DOMAIN" | $NAWK \
			    '{ for (i = 1; i <= NF; i++) \
			    print "domain ", $i }' >> $file.$$
		fi
		if [ -n "$DNS_SEARCH" ]; then
			echo "$DNS_SEARCH" | $NAWK \
                            '{ printf("search"); \
			    for (i = 1; i <= NF; i++) printf(" %s", $i); \
			    printf("\n") }' >> $file.$$
		fi
		if [ -n "$DNS_SERVERS" ]; then
			echo "$DNS_SERVERS" | $NAWK \
			    '{ for (i = 1; i <= NF; i++) \
			    print "nameserver ", $i }' >> $file.$$
		fi
	done	

	# Finally, copy our working version to the real thing
	$MV -f $file.$$ $file
	start_svc $DNS_CLIENT_FMRI

	return 0
}

#
# do_nis <location>
#
# Installs NIS information on /var/yp/binding/ for location
#
# Returns 0 on success, 1 on failure
#
do_nis () {
	loc=$1

	NIS_CONFIGSRC=`nwam_get_loc_list_prop $loc nis-nameservice-configsrc`
	if [ -z "$NIS_CONFIGSRC" ]; then
		echo "missing 'nis-nameservice-configsrc' property for '$loc'"
		return 1
	fi

	for configsrc in $NIS_CONFIGSRC; do
		case "$configsrc" in
		'manual')
			NIS_SERVERS=`nwam_get_loc_list_prop $loc \
			    nis-nameservice-servers`
			DEFAULT_DOMAIN=`nwam_get_loc_prop $loc default-domain`
			# user-specified default-domain always wins
			if [ -n "$DEFAULT_DOMAIN" ]; then
				$DOMAINNAME $DEFAULT_DOMAIN
				$DOMAINNAME > $ETC_DEFAULT_DOMAIN
			else
				echo "'domainname' not set for '$loc'"
				return 1
			fi
			;;
		'dhcp')
			# Use only the first name
			DEFAULT_DOMAIN=`get_dhcpinfo NISdmain | \
			    $NAWK '{ print $1 }'`
			NIS_SERVERS=`get_dhcpinfo NISservs`
			$DOMAINNAME $DEFAULT_DOMAIN
			$DOMAINNAME > $ETC_DEFAULT_DOMAIN
			;;
		'*')
			echo "Unrecognized NIS configsrc ${configsrc}; ignoring"
			;;
		esac

		# Place NIS settings in appropriate directory/file.
		if [ ! -d "$NIS_BIND_PATH/$DEFAULT_DOMAIN" ]; then
			$MKDIR -p $NIS_BIND_PATH/$DEFAULT_DOMAIN
		fi
		if [ -n "$NIS_SERVERS" ]; then
			echo "$NIS_SERVERS" | $NAWK \
			    '{ for (i = 1; i <= NF; i++) print $i }' \
			    > $NIS_BIND_PATH/$DEFAULT_DOMAIN/ypservers
		fi
	done

	start_svc $NIS_CLIENT_FMRI

	return 0
}

#
# do_ldap <location>
#
# Installs LDAP information using ldapclient(8) for location
#
# Returns 0 on success, 1 on failure
#
do_ldap () {
	loc=$1

	LDAP_CONFIGSRC=`nwam_get_loc_list_prop $loc ldap-nameservice-configsrc`
	if [ -z "$LDAP_CONFIGSRC" ]; then
		echo "missing 'ldap-nameservice-configsrc' property for '$loc'"
		return 1
	fi

	for configsrc in $LDAP_CONFIGSRC; do
		case "$configsrc" in
		'manual')
			LDAP_SERVERS=`nwam_get_loc_list_prop $loc \
			    ldap-nameservice-servers`
			DEFAULT_DOMAIN=`nwam_get_loc_prop $loc default-domain`
			if [ -z $LDAP_SERVERS -o -z $DEFAULT_DOMAIN ]; then
				echo "LDAP configuration could not be set "\
				    "for '$loc'"
				return 1
			fi
			$DOMAINNAME $DEFAULT_DOMAIN
			$DOMAINNAME > $ETC_DEFAULT_DOMAIN
			;;
		'*')
			echo "Invalid LDAP configsrc ${configsrc}; ignoring"
			;;
		esac

		# Use ldapclient(8) to initialize LDAP client settings.
		if [ -n "$DEFAULT_DOMAIN" -o -n "$LDAP_SERVERS" ]; then
			$LDAPCLIENT init -a domainName=$DEFAULT_DOMAIN \
			    $LDAP_SERVERS
		fi
	done

	start_svc $LDAP_CLIENT_FMRI

	return 0
}

#
# do_ns <location>
#
# Installs different nameservices for location 
#
# Returns 0 on success, 1 on failure
#
do_ns () {
	loc=$1

	#
	# Disable nameservices temporarily while we reconfigure.  Copy
	# /etc/nsswitch.files to /etc/nsswitch.conf first so that only "files"
	# are used.
	#
	$CP -p /etc/nsswitch.files /etc/nsswitch.conf
	stop_svc $DNS_CLIENT_FMRI
	stop_svc $NIS_CLIENT_FMRI
	stop_svc $LDAP_CLIENT_FMRI

	#
	# Remove /etc/defaultdomain and unset domainname(8).  If NIS
	# and/or LDAP is configured, they will create /etc/defaultdomain
	# and set the domainname(8).
	#
	$RM -f $ETC_DEFAULT_DOMAIN
	$DOMAINNAME " "

	NAMESERVICES=`nwam_get_loc_list_prop $loc nameservices`
	if [ -z "$NAMESERVICES" ]; then
		echo "missing 'nameservices' property for location '$loc'"
		return 1
	fi

	NAMESERVICES_CONFIG_FILE=`nwam_get_loc_prop \
	    $loc nameservices-config-file`
	if [ -z "$NAMESERVICES_CONFIG_FILE" ]; then
		echo "missing 'nameservices-config-file' property for '$loc'"
		return 1
	fi
	$CP -p $NAMESERVICES_CONFIG_FILE /etc/nsswitch.conf

	for ns in $NAMESERVICES; do
		case "$ns" in
		'files')
			# no additional setup needed for files nameservice
			;;
		'dns')
			do_dns $loc || return 1
			;;
		'nis')
			do_nis $loc || return 1
			;;
		'ldap')
			do_ldap $loc || return 1
			;;
		'*')
			echo "Unrecognized nameservices value ${ns}; ignoring"
			;;
		esac
	done

	#
	# Restart other related services
	#
	# We explicitly restart here, as restart will only have an
	# effect if the service is already enabled.  We don't want
	# to enable the service if it's currently disabled.
	#
	restart_svc $AUTOFS_FMRI

	return 0
}

#
# do_sec <location>
#
# If config properties are set, update the SMF property and refresh the
# service.  If config properties are not set, delete the SMF property and
# stop the service.
#
# Returns 0 on success, 1 on failure
#
do_sec () {
	loc=$1

	ike_file=`nwam_get_loc_prop $loc ike-config-file`
	pol_file=`nwam_get_loc_prop $loc ipsecpolicy-config-file`
	ipf_file=`nwam_get_loc_prop $loc ipfilter-config-file`
	ipf6_file=`nwam_get_loc_prop $loc ipfilter-v6-config-file`
	ipnat_file=`nwam_get_loc_prop $loc ipnat-config-file`
	ippool_file=`nwam_get_loc_prop $loc ippool-config-file`

	# IKE
	if [ -n "$ike_file" ]; then
		set_smf_prop $IPSEC_IKE_FMRI config/config_file $ike_file
		refresh_svc $IPSEC_IKE_FMRI
		start_svc $IPSEC_IKE_FMRI
	else
		stop_svc $IPSEC_IKE_FMRI
	fi

	# IPsec
	if [ -n "$pol_file" ]; then
		set_smf_prop $IPSEC_POLICY_FMRI config/config_file $pol_file
		refresh_svc $IPSEC_POLICY_FMRI
		start_svc $IPSEC_POLICY_FMRI
	else
		stop_svc $IPSEC_POLICY_FMRI
	fi

	# IPFilter
	refresh_ipf=false
	if [ -n "$ipf_file" ]; then
		if [ "$ipf_file" = "/none" ]; then
			set_smf_prop $IPFILTER_FMRI \
			    firewall_config_default/policy "none"
		elif [ "$ipf_file" = "/deny" ]; then
			set_smf_prop $IPFILTER_FMRI \
			    firewall_config_default/policy "deny"
		elif [ "$ipf_file" = "/allow" ]; then
			set_smf_prop $IPFILTER_FMRI \
			    firewall_config_default/policy "allow"
		else
			# custom policy with policy file
			set_smf_prop $IPFILTER_FMRI \
			    firewall_config_default/policy "custom"
			set_smf_prop $IPFILTER_FMRI \
			    firewall_config_default/custom_policy_file $ipf_file
		fi
		refresh_ipf=true
	else
		# change policy to "none", no need to clear custom_policy_file
		set_smf_prop $IPFILTER_FMRI firewall_config_default/policy \
		    "none"
		# IPFilter has to be refreshed to make the changes effective.
		# Don't set $refresh_ipf as it keeps IPFilter online rather
		# than disabled.  Refresh after IPFilter is disabled below.
	fi
	if [ -n "$ipf6_file" ]; then
		set_smf_prop $IPFILTER_FMRI config/ipf6_config_file $ipf6_file
		refresh_ipf=true
	fi
	if [ -n "$ipnat_file" ]; then
		set_smf_prop $IPFILTER_FMRI config/ipnat_config_file $ipnat_file
		refresh_ipf=true
	fi
	if [ -n "$ippool_file" ]; then
		set_smf_prop $IPFILTER_FMRI config/ippool_config_file \
		    $ippool_file
		refresh_ipf=true
	fi

	if [ "$refresh_ipf" = "true" ]; then
		refresh_svc $IPFILTER_FMRI
		start_svc $IPFILTER_FMRI
	else
		stop_svc $IPFILTER_FMRI
		refresh_svc $IPFILTER_FMRI
	fi

	return 0
}

#
# do_nfsv4 <location>
#
# Updates NFSv4 domain for location in SMF
#
# Returns 0 on success, 1 on failure
#
do_nfsv4 () {
	loc=$1

	nfsv4domain=`nwam_get_loc_prop $loc nfsv4-domain`
	if [ $? -eq 0 ]; then
		set_smf_prop $MAPID_FMRI \
		    nfs-props/nfsmapid_domain $nfsv4domain
		start_svc $MAPID_FMRI
	else
		stop_svc $MAPID_FMRI
	fi

	return 0
}

#
# activate_loc <location>
#
# Activates the given location
#
# Returns 0 on success, 1 on failure
#
activate_loc () {
	loc=$1

	echo activating $loc location

	#
	# if we fail to complete any part of the config,
	# stop activation work and report failure.
	#
	do_sec $loc && do_ns $loc && do_nfsv4 $loc && return 0
	return 1
}

#
# Script entry point
#
# Arguments to net-loc are
#	method ('start' or 'refresh')

#
# If nwam is not enabled, do nothing and return OK.
#
service_is_enabled $NWAM_FMRI || exit $SMF_EXIT_OK

#
# 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

case "$1" in

'start')
	#
	# We need to create the default (NoNet and Automatic)
	# locations, if they don't already exist.  So: first check
	# for the existence of each, and then run the appropriate
	# nwamcfg script(s) as needed. Restart nwamd if a location is
	# created, as it needs to read it in.
	#
	LOC_CREATED="false"
	$NWAMCFG list loc Automatic >/dev/null 2>&1
	if [ $? -eq 1 ]; then
		$NWAMCFG -f /etc/nwam/loc/create_loc_auto
		LOC_CREATED="true"
	fi

	$NWAMCFG list loc NoNet >/dev/null 2>&1
	if [ $? -eq 1 ]; then
		NONETPATH=/etc/nwam/loc/NoNet
		NONETFILES="ipf.conf ipf6.conf"
		for file in $NONETFILES; do
			copy_default $NONETPATH $file
		done
		$NWAMCFG -f /etc/nwam/loc/create_loc_nonet
		LOC_CREATED="true"
	fi

	if [ "$LOC_CREATED" = "true" ]; then
		refresh_svc $NWAM_FMRI
	fi

	# location selection/activation happens below
	;;

'refresh')

	# location selection/activation happens below
	;;

*)
	echo "Usage: $0 start|refresh"
	exit 1
	;;

esac

#
# If the Legacy location doesn't exist and the file to create the Legacy
# location exists, create the Legacy location.  Make a copy of it as the user's
# intentions before upgrade.  Then activate the User location if nis is
# involved.  Because NIS affects more parts of the system (e.g. automounts) we
# are not willing to make NIS part of the Automatic location (i.e. enable it
# automatically based on external input) as we do with DHCP-driven DNS.
#
activate_user_loc=0
$NWAMCFG list loc Legacy >/dev/null 2>&1
if [ $? -eq 1 -a -f "$SCRIPT_PATH/create_loc_legacy" ]; then
	#
	# We built the script in and pointing to /etc/svc/volatile because we
	# may not have a writable filesystem in net-nwam.  So here we move the
	# components and rewrite the script to point at the writable filesystem.
	#
	$CP -r $SCRIPT_PATH/Legacy /etc/nwam/loc
	$MV $SCRIPT_PATH/create_loc_legacy $SCRIPT_PATH/vcreate_loc_legacy
	$SED -e's,$SCRIPT_PATH/Legacy,$LEGACY_LOC_PATH,' \
	    $SCRIPT_PATH/vcreate_loc_legacy >$SCRIPT_PATH/create_loc_legacy
	$RM -f $SCRIPT_PATH/vcreate_loc_legacy
	$NWAMCFG -f $SCRIPT_PATH/create_loc_legacy
	loc_ver=`$SVCPROP -c -p location_upgrade/version $LOCATION_FMRI \
	    2>/dev/null`
	if [ $? -eq 1 ]; then
		#
		# We are rewriting configuration variables from the Legacy
		# location to the User location.  Use variable ULP to keep REs
		# within a line.
		#
		ULP=$USER_LOC_PATH
		$SED -e's,Legacy,User,' \
		    -e's,activation-mode=system,activation-mode=manual,' \
		    -e"s,\(ipfilter-config-file=\).*/\(.*\),\1$ULP/\2," \
		    -e"s,\(ipfilter-v6-config-file=\).*/\(.*\),\1$ULP/\2," \
		    -e"s,\(ipnat-config-file=\).*/\(.*\),\1$ULP/\2," \
		    -e"s,\(ippool-config-file=\).*/\(.*\),\1$ULP/\2," \
		    -e"s,\(ike-config-file=\).*/\(.*\),\1$ULP/\2," \
		    -e"s,\(ipsecpolicy-config-file=\).*/\(.*\),\1$ULP/\2," \
		    $SCRIPT_PATH/create_loc_legacy | \
			$SED -e's,/etc/nwam/loc/User/none,/none,' \
			-e's,/etc/nwam/loc/User/allow,/allow,' \
			-e's,/etc/nwam/loc/User/deny,/deny,' \
			>$SCRIPT_PATH/create_loc_user
		#
		# We are creating the User location here.  The User location
		# is an appromixation of the machine configuration when the
		# user change or upgraded to this version of NWAM.  First
		# we make sure there isn't an existing User location or any
		# existing User location data.  We then copy all the data
		# from the Legacy location and create a location pointing at
		# that data.  Lastly we create a version property to note
		# that we have done this.
		#
		$NWAMCFG destroy loc User 2>/dev/null
		$RM -rf $USER_LOC_PATH
		$CP -r $LEGACY_LOC_PATH $USER_LOC_PATH
		$RM -f $USER_LOC_PATH/resolv.conf
		$NWAMCFG -f $SCRIPT_PATH/create_loc_user
		# The User location is activated if 'nis' is in a non comment
		# line of nsswitch.conf.
		$GREP -v "^#" $USER_LOC_PATH/nsswitch.conf |\
		    $SED -e 's/[^:]*://' | $GREP nis >/dev/null 2>&1
		if [ $? -eq 0 ]; then
			activate_user_loc=1
		fi
		$SVCCFG -s $SMF_FMRI addpg location_upgrade application \
		    2>/dev/null
		$SVCCFG -s $SMF_FMRI setprop location_upgrade/version = \
		    astring: "1"
	fi
fi

#
# Activate a location.  If we've just finished upgrading, and
# the User location should be activated, do that (and use nwamadm
# to do so, so the enabled property gets set and nwamd knows this
# selection has been made).  Otherwise, if our location/selected
# property has a value, we activate that location; else we activate
# the NoNet location as a default value.
#
if [ $activate_user_loc -eq 1 ]; then
	$NWAMADM enable -p loc User
else
	sel_loc=`$SVCPROP -c -p location/selected $SMF_FMRI 2>/dev/null`
	if [ $? -eq 1 ]; then
		# location hasn't been selected; default to NoNet
		activate_loc NoNet
	else
		#
		# If the selected location does not exist, or if we fail
		# to activate it completely, we fall back to the NoNet
		# location.  Also poke nwamd, so it will check conditions
		# for a better choice.
		#
		$NWAMCFG list loc $sel_loc >/dev/null 2>&1
		if [ $? -eq 1 ]; then
			echo "location '$sel_loc' doesn't exist"
			activate_loc NoNet
			refresh_svc $NWAM_FMRI
		else
			# activate selected location
			if ! activate_loc $sel_loc; then
				echo "failed to activate '$sel_loc'"
				activate_loc NoNet
				refresh_svc $NWAM_FMRI
			fi
		fi
	fi
fi

exit $SMF_EXIT_OK