pfSense

#!/bin/sh

#

# Copyright (c) 2007 Pawel Jakub Dawidek <pjd@FreeBSD.org>

# Copyright (c) 2015 Xin LI <delphij@FreeBSD.org>

# 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 AUTHORS 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 AUTHORS OR CONTRIBUTORS BE LIABLE

# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

# DAMAGES (INCLUDING, 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.

#

# $FreeBSD$

#

# PROVIDE: hostid

# REQUIRE: sysctl

# KEYWORD: nojail

. /etc/rc.subr

name="hostid"

start_cmd="hostid_start"

stop_cmd=":"

reset_cmd="hostid_reset"

extra_commands="reset"

rcvar="hostid_enable"

hostid_set()

{

	uuid=$1

	# Generate hostid based on hostuuid - take first four bytes from md5(uuid).

	id=`echo -n $uuid | /sbin/md5`

	id="0x${id%????????????????????????}"

	# Set both kern.hostuuid and kern.hostid.

	#

	check_startmsgs && echo "Setting hostuuid: ${uuid}."

	${SYSCTL} kern.hostuuid="${uuid}" >/dev/null

	check_startmsgs && echo "Setting hostid: ${id}."

	${SYSCTL} kern.hostid=${id} >/dev/null

}

valid_hostid()

{

	uuid=$1

	x="[0-9a-f]"

	y=$x$x$x$x

	# Check against a blacklist before

	# accepting the UUID.

	case "${uuid}" in

	00000000-0000-0000-0000-000000000000)

		;;

	00020003-0004-0005-0006-000700080009)

		;;

	03000200-0400-0500-0006-000700080009)

		;;

	07090201-0103-0301-0807-060504030201)

		;;

	11111111-1111-1111-1111-111111111111)

		;;

	11111111-2222-3333-4444-555555555555)

		;;

	4c4c4544-0000-2010-8020-80c04f202020)

		;;

	58585858-5858-5858-5858-585858585858)

		;;

	890e2d14-cacd-45d1-ae66-bc80e8bfeb0f)

		;;

	8e275844-178f-44a8-aceb-a7d7e5178c63)

		;;

	dc698397-fa54-4cf2-82c8-b1b5307a6a7f)

		;;

	fefefefe-fefe-fefe-fefe-fefefefefefe)

		;;

	*-ffff-ffff-ffff-ffffffffffff)

		;;

	$y$y-$y-$y-$y-$y$y$y)

		return 0

		;;

	esac

	return 1

}

hostid_generate()

{

	# First look for UUID in hardware.

	# If not found, fall back to software-generated UUID.

	uuid=`uuidgen`

	hostid_set $uuid

}

hostid_reset()

{

	hostid_generate

	# Store newly generated UUID in ${hostid_file}.

	echo $uuid > ${hostid_file}

	if [ $? -ne 0 ]; then

		warn "could not store hostuuid in ${hostid_file}."

	fi

}

hostid_start()

{

	# If ${hostid_file} already exists, we take UUID from there.

	if [ -r ${hostid_file} ]; then

		read saved_hostid < ${hostid_file}

		if valid_hostid ${saved_hostid}; then

			hostid_set `cat ${hostid_file}`

			exit 0

		fi

	fi

	# No hostid file, generate UUID.

	hostid_generate

}

load_rc_config $name

run_rc_command "$1"