xref: /illumos-gate/usr/src/cmd/svc/milestone/net-loopback (revision 0607ca1fcd1ec6bf13143796f8d6b134deff1eb0)

#!/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 2010 Sun Microsystems, Inc.  All rights reserved.
# Use is subject to license terms.
#
# Copyright 2024 Oxide Computer Company
#

. /lib/svc/share/smf_include.sh

#
# 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

rc=$SMF_EXIT_OK

degrade() {
	echo "$@" >&2
	rc=$SMF_EXIT_MON_DEGRADE
}

if [ -f /etc/hostname.lo0 ] || [ -f /etc/hostname6.lo0 ]; then
	echo "found /etc/hostname.lo0 or /etc/hostname6.lo0; "\
		    "using ifconfig to create lo0" > /dev/msglog
	# IPv4 loopback
	if ! /sbin/ifconfig lo0 >/dev/null 2>&1; then
		/sbin/ifconfig lo0 plumb 127.0.0.1 up || \
		    degrade "Failed to create IPv4 loopback"
	fi

	# IPv6 loopback
	if ! /sbin/ifconfig lo0 inet6 >/dev/null 2>&1; then
		/sbin/ifconfig lo0 inet6 plumb ::1 up || \
		    degrade "Failed to create IPv6 loopback"
	fi

	# Trusted Extensions shares the loopback interface with all zones
	if (smf_is_system_labeled); then
		if smf_is_globalzone; then
			/sbin/ifconfig lo0 all-zones
			/sbin/ifconfig lo0 inet6 all-zones
		fi
	fi
else
	state=`/sbin/ipadm show-if -p -o state lo0 2>/dev/null`
	if [ $? -eq 0 -a "$state" = "disabled" ]; then
		/sbin/ipadm enable-if -t lo0 || \
		    degrade "Failed to enable loopback interface"
	else
		# IPv4 loopback
		state=`/sbin/ipadm show-addr -po state lo0/v4`
		if [ $? -ne 0 -o -z "$state" ]; then
			/sbin/ipadm create-addr -t \
			    -T static -a 127.0.0.1/8 lo0/v4 || \
			    degrade "Failed to create IPv4 loopback"
		fi

		# IPv6 loopback
		state=`/sbin/ipadm show-addr -po state lo0/v6`
		if [ $? -ne 0 -o -z "$state" ]; then
			/sbin/ipadm create-addr -t \
			    -T static -a ::1/128 lo0/v6 || \
			    degrade "Failed to create IPv6 loopback"
		fi
	fi

	# Trusted Extensions shares the loopback interface with all zones
	if (smf_is_system_labeled); then
		if smf_is_globalzone; then
			/sbin/ipadm set-addrprop -t -p zone=all-zones lo0/v4
			/sbin/ipadm set-addrprop -t -p zone=all-zones lo0/v6
		fi
	fi
fi

exit $rc