if [ ! "$_NETWORKING_ROUTING_SUBR" ]; then _NETWORKING_ROUTING_SUBR=1
#
# Copyright (c) 2006-2012 Devin Teske
# All Rights Reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
# $FreeBSD: head/usr.sbin/bsdconfig/networking/share/routing.subr 244675 2012-12-25 10:47:45Z dteske $
#
############################################################ INCLUDES

BSDCFG_SHARE="/usr/share/bsdconfig"
. $BSDCFG_SHARE/common.subr || exit 1
f_dprintf "%s: loading includes..." networking/routing.subr
f_include $BSDCFG_SHARE/sysrc.subr
f_include $BSDCFG_SHARE/dialog.subr
f_include $BSDCFG_SHARE/networking/common.subr
f_include $BSDCFG_SHARE/networking/ipaddr.subr

BSDCFG_LIBE="/usr/libexec/bsdconfig" APP_DIR="120.networking"
f_include_lang $BSDCFG_LIBE/$APP_DIR/include/messages.subr

############################################################ FUNCTIONS

# f_route_get_default
#
# Returns the IP address of the currently active default router.
#
f_route_get_default()
{
	route -n get default 2> /dev/null | awk \
	'
		BEGIN { found = 0 }
		( $1 == "gateway:" ) \
		{
			print $2
			found = 1
			exit
		}
		END { exit ! found }
	'
}

# f_dialog_input_defaultrouter
#
# Edits the default router.
#
f_dialog_input_defaultrouter()
{
	#
	# Get the defaultrouter. When this is not configured, the default is
	# "NO", however we don't ever want to present this default to the user
	# in the following dialog. If the current value is "NO", then try to
	# obtain the value from the running system using route(8).
	#
	# NOTE: Our `f_route_get_default' function will return NULL if the
	# system does not have an active default router set (which is what we
	# want).
	#
	local defaultrouter="$( f_sysrc_get 'defaultrouter:-NO' )"
	local defaultrouter_orig="$defaultrouter" # for change-tracking
	case "$defaultrouter" in
	[Nn][Oo])
		defaultrouter=$( f_route_get_default )
		;;
	esac

	#
	# Return with-error when there are NFS-mounts currently active. If the
	# default router/gateway is changed while NFS-exported directories are
	# mounted, the system will hang.
	#
	if f_nfs_mounted && ! f_jailed; then
		local setting="$( printf "$msg_current_default_router" \
		                         "$defaultrouter" )"
		f_show_msg "$msg_nfs_mounts_may_cause_hang" "$setting"
		return $FAILURE
	fi

	#
	# Loop until the user provides taint-free input.
	#
	local retval
	while :; do
		defaultrouter=$( f_dialog_input \
			"$msg_please_enter_default_router" \
			"$defaultrouter" "$hline_num_punc_tab_enter"
		)
		retval=$?
		[ "$defaultrouter" ] || return $SUCCESS
		[ $retval -eq $SUCCESS ] || return $retval

		# Taint-check the user's input
		f_dialog_validate_ipaddr "$defaultrouter" && break
	done

	#
	# Save only if the user changed the default router/gateway.
	#
	if [ "$defaultrouter" != "$defaultrouter_orig" ]; then
		f_dialog_info "$msg_saving_default_router"

		# Save the default router/gateway
		f_sysrc_set defaultrouter "$defaultrouter"
	fi

	#
	# Only ask to apply setting if the current defaultrouter is different
	# than the stored configuration (in rc.conf(5)).
	#
	if [ "$( f_route_get_default )" != "$defaultrouter" ]; then
		f_dialog_clear
		f_dialog_yesno "$(
			printf "$msg_activate_default_router" \
			       "$( f_route_get_default )" "$defaultrouter"
		)"

		if [ $? -eq $SUCCESS ]; then
			local err

			# Apply the default router/gateway
			f_quietly route delete default
			err=$( route add default "$defaultrouter" 2>&1 )
			if [ $? -ne $SUCCESS ]; then
				f_dialog_msgbox "$err"
				return $FAILURE
			fi
		fi
	fi
}

############################################################ MAIN

f_dprintf "%s: Successfully loaded." networking/routing.subr

fi # ! $_NETWORKING_ROUTING_SUBR