[ipfire-2.x.git] / src / initscripts / init.d / unbound

#!/bin/sh
# Begin $rc_base/init.d/unbound

# Description : Unbound DNS resolver boot script for IPfire
# Author      : Marcel Lorenz <marcel.lorenz@ipfire.org>

. /etc/sysconfig/rc
. ${rc_functions}

TEST_DOMAIN="ipfire.org"

# This domain will never validate
TEST_DOMAIN_FAIL="dnssec-failed.org"

INSECURE_ZONES=
USE_FORWARDERS=1

# Cache any local zones for 60 seconds
LOCAL_TTL=60

# EDNS buffer size
EDNS_DEFAULT_BUFFER_SIZE=4096

# Load optional configuration
[ -e "/etc/sysconfig/unbound" ] && . /etc/sysconfig/unbound

function cidr() {
    local cidr nbits IFS;
    IFS=. read -r i1 i2 i3 i4 <<< ${1}
    IFS=. read -r m1 m2 m3 m4 <<< ${2}
    cidr=$(printf "%d.%d.%d.%d\n" "$((i1 & m1))" "$((i2 & m2))" "$((i3 & m3))" "$((i4 & m4))")
    nbits=0
    IFS=.
    for dec in $2 ; do
        case $dec in
            255) let nbits+=8;;
            254) let nbits+=7;;
            252) let nbits+=6;;
            248) let nbits+=5;;
            240) let nbits+=4;;
            224) let nbits+=3;;
            192) let nbits+=2;;
            128) let nbits+=1;;
            0);;
            *) echo "Error: $dec is not recognised"; exit 1
        esac
    done
    echo "${cidr}/${nbits}"
}

ip_address_revptr() {
	local addr=${1}

	local a1 a2 a3 a4
	IFS=. read -r a1 a2 a3 a4 <<< ${addr}

	echo "${a4}.${a3}.${a2}.${a1}.in-addr.arpa"
}

read_name_servers() {
	local i
	for i in 1 2; do
		echo "$(</var/ipfire/red/dns${i})"
	done | xargs echo
}

config_header() {
	echo "# This file is automatically generated and any changes"
	echo "# will be overwritten. DO NOT EDIT!"
	echo
}

update_forwarders() {
	if [ "${USE_FORWARDERS}" = "1" -a -e "/var/ipfire/red/active" ]; then
		local forwarders
		local broken_forwarders

		local ns
		for ns in $(read_name_servers); do
			test_name_server ${ns} &>/dev/null
			case "$?" in
				# Only use DNSSEC-validating or DNSSEC-aware name servers
				0|2)
					forwarders="${forwarders} ${ns}"
					;;
				*)
					broken_forwarders="${broken_forwarders} ${ns}"
					;;
			esac
		done

		# Determine EDNS buffer size
		local new_edns_buffer_size=${EDNS_DEFAULT_BUFFER_SIZE}

		for ns in ${forwarders}; do
			local edns_buffer_size=$(ns_determine_edns_buffer_size ${ns})
			if [ -n "${edns_buffer_size}" ]; then
				if [ ${edns_buffer_size} -lt ${new_edns_buffer_size} ]; then
					new_edns_buffer_size=${edns_buffer_size}
				fi
			fi
		done

		if [ ${new_edns_buffer_size} -lt ${EDNS_DEFAULT_BUFFER_SIZE} ]; then
			boot_mesg "EDNS buffer size reduced to ${new_edns_buffer_size}" ${WARNING}
			echo_warning

			unbound-control -q set_option edns-buffer-size: ${new_edns_buffer_size}
		fi

		# Show warning for any broken upstream name servers
		if [ -n "${broken_forwarders}" ]; then
			boot_mesg "Ignoring broken upstream name server(s): ${broken_forwarders:1}" ${WARNING}
			echo_warning
		fi

		if [ -n "${broken_forwarders}" -a -z "${forwarders}" ]; then
			boot_mesg "Falling back to recursor mode" ${WARNING}
			echo_warning

		elif [ -n "${forwarders}" ]; then
			boot_mesg "Configuring upstream name server(s): ${forwarders:1}" ${INFO}
			echo_ok

			echo "${forwarders}" > /var/ipfire/red/dns
			unbound-control -q forward ${forwarders}
			return 0
		fi
	fi

	# If forwarders cannot be used we run in recursor mode
	echo "local recursor" > /var/ipfire/red/dns
	unbound-control -q forward off
}

own_hostname() {
	local hostname=$(hostname -f)
	# 1.1.1.1 is reserved for unused green, skip this
	if [ -n "${GREEN_ADDRESS}" -a "${GREEN_ADDRESS}" != "1.1.1.1" ]; then
		unbound-control -q local_data "${hostname} ${LOCAL_TTL} IN A ${GREEN_ADDRESS}"
	fi

	local address
	for address in ${GREEN_ADDRESS} ${BLUE_ADDRESS} ${ORANGE_ADDRESS}; do
		[ -n "${address}" ] || continue
		[ "${address}" = "1.1.1.1" ] && continue

		address=$(ip_address_revptr ${address})
		unbound-control -q local_data "${address} ${LOCAL_TTL} IN PTR ${hostname}"
	done
}

update_hosts() {
	local enabled address hostname domainname

	while IFS="," read -r enabled address hostname domainname; do
		[ "${enabled}" = "on" ] || continue

		# Build FQDN
		local fqdn="${hostname}.${domainname}"

		unbound-control -q local_data "${fqdn} ${LOCAL_TTL} IN A ${address}"

		# Skip reverse resolution if the address equals the GREEN address
		[ "${address}" = "${GREEN_ADDRESS}" ] && continue

		# Add RDNS
		address=$(ip_address_revptr ${address})
		unbound-control -q local_data "${address} ${LOCAL_TTL} IN PTR ${fqdn}"
	done < /var/ipfire/main/hosts
}

write_forward_conf() {
	(
		config_header

		local insecure_zones="${INSECURE_ZONES}"

		local enabled zone server remark
		while IFS="," read -r enabled zone server remark; do
			# Line must be enabled.
			[ "${enabled}" = "on" ] || continue

			# Zones that end with .local are commonly used for internal
			# zones and therefore not signed
			case "${zone}" in
				*.local)
					insecure_zones="${insecure_zones} ${zone}"
					;;
			esac

			echo "forward-zone:"
			echo "	name: ${zone}"
			echo "	forward-addr: ${server}"
			echo
		done < /var/ipfire/dnsforward/config

		if [ -n "${insecure_zones}" ]; then
			echo "server:"

			for zone in ${insecure_zones}; do
				echo "	domain-insecure: ${zone}"
			done
		fi
	) > /etc/unbound/forward.conf
}

write_tuning_conf() {
	# https://www.unbound.net/documentation/howto_optimise.html

	# Determine number of online processors
	local processors=$(getconf _NPROCESSORS_ONLN)

	# Determine number of slabs
	local slabs=1
	while [ ${slabs} -lt ${processors} ]; do
		slabs=$(( ${slabs} * 2 ))
	done

	# Determine amount of system memory
	local mem=$(get_memory_amount)

	# In the worst case scenario, unbound can use double the
	# amount of memory allocated to a cache due to malloc overhead

	# Large systems with more than 2GB of RAM
	if [ ${mem} -ge 2048 ]; then
		mem=128

	# Small systems with less than 256MB of RAM
	elif [ ${mem} -le 256 ]; then
		mem=8

	# Everything else
	else
		mem=32
	fi

	(
		config_header

		# We run one thread per processor
		echo "num-threads: ${processors}"

		# Adjust number of slabs
		echo "infra-cache-slabs: ${slabs}"
		echo "key-cache-slabs: ${slabs}"
		echo "msg-cache-slabs: ${slabs}"
		echo "rrset-cache-slabs: ${slabs}"

		# Slice up the cache
		echo "rrset-cache-size: $(( ${mem} / 2 ))m"
		echo "msg-cache-size: $(( ${mem} / 4 ))m"
		echo "key-cache-size: $(( ${mem} / 4 ))m"
	) > /etc/unbound/tuning.conf
}

get_memory_amount() {
	local key val unit

	while read -r key val unit; do
		case "${key}" in
			MemTotal:*)
				# Convert to MB
				echo "$(( ${val} / 1024 ))"
				break
				;;
		esac
	done < /proc/meminfo
}

test_name_server() {
	local ns=${1}
	local args

	# Return codes:
	# 0	DNSSEC validating
	# 1	Error: unreachable, etc.
	# 2	DNSSEC aware
	# 3	NOT DNSSEC-aware

	# Exit when the server is not reachable
	ns_is_online ${ns} || return 1

	# Determine the maximum edns buffer size that works
	local edns_buffer_size=$(ns_determine_edns_buffer_size ${ns})
	if [ -n "${edns_buffer_size}" ]; then
		args="${args} +bufsize=${edns_buffer_size}"
	fi

	local errors
	for rr in DNSKEY DS RRSIG; do
		if ! ns_forwards_${rr} ${ns} ${args}; then
			errors="${errors} ${rr}"
		fi
	done

	if [ -n "${errors}" ]; then
		echo >&2 "Unable to retrieve the following resource records from ${ns}: ${errors:1}"
		return 3
	fi

	if ns_is_validating ${ns} ${args}; then
		# Return 0 if validating
		return 0
	else
		# Is DNSSEC-aware
		return 2
	fi
}

# Sends an A query to the nameserver w/o DNSSEC
ns_is_online() {
	local ns=${1}
	shift

	dig @${ns} +nodnssec A ${TEST_DOMAIN} $@ >/dev/null
}

# Resolving ${TEST_DOMAIN_FAIL} will fail if the nameserver is validating
ns_is_validating() {
	local ns=${1}
	shift

	dig @${ns} A ${TEST_DOMAIN_FAIL} $@ | grep -q SERVFAIL
}

# Checks if we can retrieve the DNSKEY for this domain.
# dig will print the SOA if nothing was found
ns_forwards_DNSKEY() {
	local ns=${1}
	shift

	dig @${ns} DNSKEY ${TEST_DOMAIN} $@ | grep -qv SOA
}

ns_forwards_DS() {
	local ns=${1}
	shift

	dig @${ns} DS ${TEST_DOMAIN} $@ | grep -qv SOA
}

ns_forwards_RRSIG() {
	local ns=${1}
	shift

	dig @${ns} +dnssec A ${TEST_DOMAIN} $@ | grep -q RRSIG
}

ns_supports_tcp() {
	local ns=${1}
	shift

	dig @${ns} +tcp A ${TEST_DOMAIN} $@ >/dev/null || return 1
}

ns_determine_edns_buffer_size() {
	local ns=${1}
	shift

	local b
	for b in 4096 2048 1500 1480 1464 1400 1280 512; do
		if dig @${ns} +dnssec +bufsize=${b} A ${TEST_DOMAIN} $@ >/dev/null; then
			echo "${b}"
			return 0
		fi
	done

	return 1
}

case "$1" in
	start)
		# Print a nicer messagen when unbound is already running
		if pidofproc -s unbound; then
			statusproc /usr/sbin/unbound
			exit 0
		fi

		eval $(/usr/local/bin/readhash /var/ipfire/ethernet/settings)

		# Create control keys at first run
		if [ ! -r "/etc/unbound/unbound_control.key" ]; then
			unbound-control-setup -d /etc/unbound &>/dev/null
		fi

		# Update configuration files
		write_tuning_conf
		write_forward_conf

		boot_mesg "Starting Unbound DNS Proxy..."
		loadproc /usr/sbin/unbound || exit $?

		# Make own hostname resolveable
		own_hostname

		# Update any known forwarding name servers
		update_forwarders

		# Update hosts
		update_hosts
		;;

	stop)
		boot_mesg "Stopping Unbound DNS Proxy..."
		killproc /usr/sbin/unbound
		;;

	restart)
		$0 stop
		sleep 1
		$0 start
		;;

	status)
		statusproc /usr/sbin/unbound
		;;

	update-forwarders)
		# Do not try updating forwarders when unbound is not running
		if ! pgrep unbound &>/dev/null; then
			exit 0
		fi

		update_forwarders
		;;

	test-name-server)
		ns=${2}

		test_name_server ${ns}
		ret=${?}

		case "${ret}" in
			0)
				echo "${ns} is validating"
				;;
			2)
				echo "${ns} is DNSSEC-aware"
				;;
			3)
				echo "${ns} is NOT DNSSEC-aware"
				;;
			*)
				echo "Test failed for an unknown reason"
				exit ${ret}
				;;
		esac

		if ns_supports_tcp ${ns}; then
			echo "${ns} supports TCP fallback"
		else
			echo "${ns} does not support TCP fallback"
		fi

		edns_buffer_size=$(ns_determine_edns_buffer_size ${ns})
		if [ -n "${edns_buffer_size}" ]; then
			echo "EDNS buffer size for ${ns}: ${edns_buffer_size}"
		fi

		exit ${ret}
		;;

	*)
		echo "Usage: $0 {start|stop|restart|status|update-forwarders|test-name-server}"
		exit 1
		;;
esac

# End $rc_base/init.d/unbound
Commit	Line	Data
d0e5f71f ML	1	#!/bin/sh
	2	# Begin $rc_base/init.d/unbound
	3
	4	# Description : Unbound DNS resolver boot script for IPfire
	5	# Author : Marcel Lorenz <marcel.lorenz@ipfire.org>
d0e5f71f ML	6
	7	. /etc/sysconfig/rc
	8	. ${rc_functions}
	9
b29c97b1 AF	10	TEST_DOMAIN="ipfire.org"
	11
	12	# This domain will never validate
	13	TEST_DOMAIN_FAIL="dnssec-failed.org"
	14
7ebc0a16	15	INSECURE_ZONES=
b8f5eda8	16	USE_FORWARDERS=1
d0e5f71f	17
36792be6 MT	18	# Cache any local zones for 60 seconds
	19	LOCAL_TTL=60
	20
b2f96a94 MT	21	# EDNS buffer size
	22	EDNS_DEFAULT_BUFFER_SIZE=4096
	23
b8f5eda8 MT	24	# Load optional configuration
b8f5eda8 MT	25	[ -e "/etc/sysconfig/unbound" ] && . /etc/sysconfig/unbound
d0e5f71f ML	26
	27	function cidr() {
	28	local cidr nbits IFS;
	29	IFS=. read -r i1 i2 i3 i4 <<< ${1}
	30	IFS=. read -r m1 m2 m3 m4 <<< ${2}
	31	cidr=$(printf "%d.%d.%d.%d\n" "$((i1 & m1))" "$((i2 & m2))" "$((i3 & m3))" "$((i4 & m4))")
	32	nbits=0
	33	IFS=.
	34	for dec in $2 ; do
	35	case $dec in
	36	255) let nbits+=8;;
	37	254) let nbits+=7;;
	38	252) let nbits+=6;;
	39	248) let nbits+=5;;
	40	240) let nbits+=4;;
	41	224) let nbits+=3;;
	42	192) let nbits+=2;;
	43	128) let nbits+=1;;
	44	0);;
	45	*) echo "Error: $dec is not recognised"; exit 1
	46	esac
	47	done
	48	echo "${cidr}/${nbits}"
	49	}
	50
f75c279b AF	51	ip_address_revptr() {
	52	local addr=${1}
	53
	54	local a1 a2 a3 a4
	55	IFS=. read -r a1 a2 a3 a4 <<< ${addr}
	56
	57	echo "${a4}.${a3}.${a2}.${a1}.in-addr.arpa"
	58	}
	59
b8f5eda8 MT	60	read_name_servers() {
	61	local i
	62	for i in 1 2; do
	63	echo "$(</var/ipfire/red/dns${i})"
	64	done \| xargs echo
	65	}
	66
	67	config_header() {
	68	echo "# This file is automatically generated and any changes"
	69	echo "# will be overwritten. DO NOT EDIT!"
	70	echo
	71	}
	72
	73	update_forwarders() {
b29c97b1 AF	74	if [ "${USE_FORWARDERS}" = "1" -a -e "/var/ipfire/red/active" ]; then
	75	local forwarders
	76	local broken_forwarders
	77
	78	local ns
	79	for ns in $(read_name_servers); do
	80	test_name_server ${ns} &>/dev/null
	81	case "$?" in
	82	# Only use DNSSEC-validating or DNSSEC-aware name servers
	83	0\|2)
	84	forwarders="${forwarders} ${ns}"
	85	;;
	86	*)
	87	broken_forwarders="${broken_forwarders} ${ns}"
	88	;;
	89	esac
	90	done
	91
8f3034d0	92	# Determine EDNS buffer size
b2f96a94	93	local new_edns_buffer_size=${EDNS_DEFAULT_BUFFER_SIZE}
8f3034d0	94
b2f96a94 MT	95	for ns in ${forwarders}; do
	96	local edns_buffer_size=$(ns_determine_edns_buffer_size ${ns})
	97	if [ -n "${edns_buffer_size}" ]; then
	98	if [ ${edns_buffer_size} -lt ${new_edns_buffer_size} ]; then
	99	new_edns_buffer_size=${edns_buffer_size}
8f3034d0	100	fi
b2f96a94 MT	101	fi
	102	done
	103
	104	if [ ${new_edns_buffer_size} -lt ${EDNS_DEFAULT_BUFFER_SIZE} ]; then
	105	boot_mesg "EDNS buffer size reduced to ${new_edns_buffer_size}" ${WARNING}
	106	echo_warning
8f3034d0 MT	107
	108	unbound-control -q set_option edns-buffer-size: ${new_edns_buffer_size}
	109	fi
	110
b29c97b1 AF	111	# Show warning for any broken upstream name servers
	112	if [ -n "${broken_forwarders}" ]; then
	113	boot_mesg "Ignoring broken upstream name server(s): ${broken_forwarders:1}" ${WARNING}
	114	echo_warning
	115	fi
b8f5eda8	116
b29c97b1 AF	117	if [ -n "${broken_forwarders}" -a -z "${forwarders}" ]; then
	118	boot_mesg "Falling back to recursor mode" ${WARNING}
	119	echo_warning
b8f5eda8	120
b29c97b1 AF	121	elif [ -n "${forwarders}" ]; then
	122	boot_mesg "Configuring upstream name server(s): ${forwarders:1}" ${INFO}
	123	echo_ok
b8f5eda8	124
e24d6112	125	echo "${forwarders}" > /var/ipfire/red/dns
b29c97b1 AF	126	unbound-control -q forward ${forwarders}
	127	return 0
	128	fi
b8f5eda8	129	fi
b29c97b1 AF	130
b29c97b1 AF	131	# If forwarders cannot be used we run in recursor mode
e24d6112	132	echo "local recursor" > /var/ipfire/red/dns
b29c97b1	133	unbound-control -q forward off
b8f5eda8 MT	134	}
b8f5eda8 MT	135
f75c279b AF	136	own_hostname() {
f75c279b AF	137	local hostname=$(hostname -f)
0d7ca700	138	# 1.1.1.1 is reserved for unused green, skip this
f75c279b AF	139	if [ -n "${GREEN_ADDRESS}" -a "${GREEN_ADDRESS}" != "1.1.1.1" ]; then
	140	unbound-control -q local_data "${hostname} ${LOCAL_TTL} IN A ${GREEN_ADDRESS}"
	141	fi
	142
	143	local address
	144	for address in ${GREEN_ADDRESS} ${BLUE_ADDRESS} ${ORANGE_ADDRESS}; do
	145	[ -n "${address}" ] \|\| continue
	146	[ "${address}" = "1.1.1.1" ] && continue
	147
	148	address=$(ip_address_revptr ${address})
	149	unbound-control -q local_data "${address} ${LOCAL_TTL} IN PTR ${hostname}"
	150	done
	151	}
	152
36792be6 MT	153	update_hosts() {
	154	local enabled address hostname domainname
	155
	156	while IFS="," read -r enabled address hostname domainname; do
	157	[ "${enabled}" = "on" ] \|\| continue
	158
	159	# Build FQDN
	160	local fqdn="${hostname}.${domainname}"
	161
	162	unbound-control -q local_data "${fqdn} ${LOCAL_TTL} IN A ${address}"
f75c279b	163
868d2a1f MT	164	# Skip reverse resolution if the address equals the GREEN address
	165	[ "${address}" = "${GREEN_ADDRESS}" ] && continue
	166
f75c279b AF	167	# Add RDNS
	168	address=$(ip_address_revptr ${address})
	169	unbound-control -q local_data "${address} ${LOCAL_TTL} IN PTR ${fqdn}"
36792be6 MT	170	done < /var/ipfire/main/hosts
	171	}
	172
b8f5eda8 MT	173	write_forward_conf() {
	174	(
	175	config_header
	176
7ebc0a16	177	local insecure_zones="${INSECURE_ZONES}"
a6dcc5bb	178
b8f5eda8 MT	179	local enabled zone server remark
	180	while IFS="," read -r enabled zone server remark; do
	181	# Line must be enabled.
	182	[ "${enabled}" = "on" ] \|\| continue
	183
a6dcc5bb MT	184	# Zones that end with .local are commonly used for internal
	185	# zones and therefore not signed
	186	case "${zone}" in
	187	*.local)
	188	insecure_zones="${insecure_zones} ${zone}"
	189	;;
	190	esac
	191
b8f5eda8 MT	192	echo "forward-zone:"
	193	echo " name: ${zone}"
	194	echo " forward-addr: ${server}"
	195	echo
	196	done < /var/ipfire/dnsforward/config
a6dcc5bb MT	197
	198	if [ -n "${insecure_zones}" ]; then
	199	echo "server:"
	200
	201	for zone in ${insecure_zones}; do
	202	echo " domain-insecure: ${zone}"
	203	done
	204	fi
b8f5eda8 MT	205	) > /etc/unbound/forward.conf
	206	}
	207
b658a451 MT	208	write_tuning_conf() {
	209	# https://www.unbound.net/documentation/howto_optimise.html
	210
	211	# Determine number of online processors
	212	local processors=$(getconf _NPROCESSORS_ONLN)
	213
	214	# Determine number of slabs
	215	local slabs=1
	216	while [ ${slabs} -lt ${processors} ]; do
	217	slabs=$(( ${slabs} * 2 ))
	218	done
	219
	220	# Determine amount of system memory
	221	local mem=$(get_memory_amount)
	222
	223	# In the worst case scenario, unbound can use double the
	224	# amount of memory allocated to a cache due to malloc overhead
	225
	226	# Large systems with more than 2GB of RAM
	227	if [ ${mem} -ge 2048 ]; then
	228	mem=128
	229
	230	# Small systems with less than 256MB of RAM
	231	elif [ ${mem} -le 256 ]; then
	232	mem=8
	233
	234	# Everything else
	235	else
	236	mem=32
	237	fi
	238
	239	(
	240	config_header
	241
	242	# We run one thread per processor
	243	echo "num-threads: ${processors}"
	244
	245	# Adjust number of slabs
	246	echo "infra-cache-slabs: ${slabs}"
	247	echo "key-cache-slabs: ${slabs}"
	248	echo "msg-cache-slabs: ${slabs}"
	249	echo "rrset-cache-slabs: ${slabs}"
	250
	251	# Slice up the cache
	252	echo "rrset-cache-size: $(( ${mem} / 2 ))m"
	253	echo "msg-cache-size: $(( ${mem} / 4 ))m"
	254	echo "key-cache-size: $(( ${mem} / 4 ))m"
	255	) > /etc/unbound/tuning.conf
	256	}
	257
	258	get_memory_amount() {
	259	local key val unit
	260
	261	while read -r key val unit; do
	262	case "${key}" in
	263	MemTotal:*)
	264	# Convert to MB
	265	echo "$(( ${val} / 1024 ))"
	266	break
	267	;;
	268	esac
	269	done < /proc/meminfo
	270	}
b8f5eda8	271
b29c97b1 AF	272	test_name_server() {
b29c97b1 AF	273	local ns=${1}
8f3034d0	274	local args
b29c97b1 AF	275
	276	# Return codes:
	277	# 0 DNSSEC validating
	278	# 1 Error: unreachable, etc.
	279	# 2 DNSSEC aware
	280	# 3 NOT DNSSEC-aware
	281
	282	# Exit when the server is not reachable
	283	ns_is_online ${ns} \|\| return 1
	284
8f3034d0 MT	285	# Determine the maximum edns buffer size that works
	286	local edns_buffer_size=$(ns_determine_edns_buffer_size ${ns})
	287	if [ -n "${edns_buffer_size}" ]; then
	288	args="${args} +bufsize=${edns_buffer_size}"
	289	fi
	290
b29c97b1 AF	291	local errors
b29c97b1 AF	292	for rr in DNSKEY DS RRSIG; do
8f3034d0	293	if ! ns_forwards_${rr} ${ns} ${args}; then
b29c97b1 AF	294	errors="${errors} ${rr}"
	295	fi
	296	done
	297
	298	if [ -n "${errors}" ]; then
	299	echo >&2 "Unable to retrieve the following resource records from ${ns}: ${errors:1}"
	300	return 3
	301	fi
	302
8f3034d0	303	if ns_is_validating ${ns} ${args}; then
2aa15dee MT	304	# Return 0 if validating
	305	return 0
	306	else
	307	# Is DNSSEC-aware
	308	return 2
	309	fi
b29c97b1 AF	310	}
	311
	312	# Sends an A query to the nameserver w/o DNSSEC
	313	ns_is_online() {
	314	local ns=${1}
8f3034d0	315	shift
b29c97b1	316
8f3034d0	317	dig @${ns} +nodnssec A ${TEST_DOMAIN} $@ >/dev/null
b29c97b1 AF	318	}
	319
	320	# Resolving ${TEST_DOMAIN_FAIL} will fail if the nameserver is validating
	321	ns_is_validating() {
	322	local ns=${1}
8f3034d0	323	shift
b29c97b1	324
8f3034d0	325	dig @${ns} A ${TEST_DOMAIN_FAIL} $@ \| grep -q SERVFAIL
b29c97b1 AF	326	}
	327
	328	# Checks if we can retrieve the DNSKEY for this domain.
	329	# dig will print the SOA if nothing was found
	330	ns_forwards_DNSKEY() {
	331	local ns=${1}
8f3034d0	332	shift
b29c97b1	333
8f3034d0	334	dig @${ns} DNSKEY ${TEST_DOMAIN} $@ \| grep -qv SOA
b29c97b1 AF	335	}
	336
	337	ns_forwards_DS() {
	338	local ns=${1}
8f3034d0	339	shift
b29c97b1	340
8f3034d0	341	dig @${ns} DS ${TEST_DOMAIN} $@ \| grep -qv SOA
b29c97b1 AF	342	}
	343
	344	ns_forwards_RRSIG() {
	345	local ns=${1}
8f3034d0	346	shift
b29c97b1	347
8f3034d0	348	dig @${ns} +dnssec A ${TEST_DOMAIN} $@ \| grep -q RRSIG
b29c97b1 AF	349	}
	350
	351	ns_supports_tcp() {
	352	local ns=${1}
8f3034d0 MT	353	shift
	354
	355	dig @${ns} +tcp A ${TEST_DOMAIN} $@ >/dev/null \|\| return 1
	356	}
	357
	358	ns_determine_edns_buffer_size() {
	359	local ns=${1}
	360	shift
	361
	362	local b
	363	for b in 4096 2048 1500 1480 1464 1400 1280 512; do
	364	if dig @${ns} +dnssec +bufsize=${b} A ${TEST_DOMAIN} $@ >/dev/null; then
	365	echo "${b}"
	366	return 0
	367	fi
	368	done
b29c97b1	369
8f3034d0	370	return 1
b29c97b1 AF	371	}
b29c97b1 AF	372
d0e5f71f ML	373	case "$1" in
d0e5f71f ML	374	start)
80bc6022 MT	375	# Print a nicer messagen when unbound is already running
	376	if pidofproc -s unbound; then
	377	statusproc /usr/sbin/unbound
	378	exit 0
	379	fi
	380
b8f5eda8	381	eval $(/usr/local/bin/readhash /var/ipfire/ethernet/settings)
d0e5f71f	382
b8f5eda8 MT	383	# Create control keys at first run
	384	if [ ! -r "/etc/unbound/unbound_control.key" ]; then
	385	unbound-control-setup -d /etc/unbound &>/dev/null
	386	fi
	387
	388	# Update configuration files
b658a451	389	write_tuning_conf
b8f5eda8 MT	390	write_forward_conf
	391
	392	boot_mesg "Starting Unbound DNS Proxy..."
	393	loadproc /usr/sbin/unbound \|\| exit $?
	394
f75c279b AF	395	# Make own hostname resolveable
	396	own_hostname
	397
b8f5eda8 MT	398	# Update any known forwarding name servers
b8f5eda8 MT	399	update_forwarders
36792be6 MT	400
	401	# Update hosts
	402	update_hosts
b8f5eda8	403	;;
d0e5f71f ML	404
d0e5f71f ML	405	stop)
b8f5eda8 MT	406	boot_mesg "Stopping Unbound DNS Proxy..."
	407	killproc /usr/sbin/unbound
	408	;;
d0e5f71f ML	409
d0e5f71f ML	410	restart)
b8f5eda8 MT	411	$0 stop
	412	sleep 1
	413	$0 start
	414	;;
d0e5f71f ML	415
d0e5f71f ML	416	status)
b8f5eda8	417	statusproc /usr/sbin/unbound
b8f5eda8 MT	418	;;
	419
	420	update-forwarders)
cd812106 MT	421	# Do not try updating forwarders when unbound is not running
	422	if ! pgrep unbound &>/dev/null; then
	423	exit 0
	424	fi
	425
b8f5eda8 MT	426	update_forwarders
b8f5eda8 MT	427	;;
d0e5f71f	428
b29c97b1 AF	429	test-name-server)
	430	ns=${2}
	431
	432	test_name_server ${ns}
	433	ret=${?}
	434
	435	case "${ret}" in
	436	0)
	437	echo "${ns} is validating"
	438	;;
	439	2)
	440	echo "${ns} is DNSSEC-aware"
	441	;;
	442	3)
	443	echo "${ns} is NOT DNSSEC-aware"
	444	;;
	445	*)
	446	echo "Test failed for an unknown reason"
8f3034d0	447	exit ${ret}
b29c97b1 AF	448	;;
	449	esac
	450
	451	if ns_supports_tcp ${ns}; then
	452	echo "${ns} supports TCP fallback"
	453	else
	454	echo "${ns} does not support TCP fallback"
	455	fi
	456
8f3034d0 MT	457	edns_buffer_size=$(ns_determine_edns_buffer_size ${ns})
	458	if [ -n "${edns_buffer_size}" ]; then
	459	echo "EDNS buffer size for ${ns}: ${edns_buffer_size}"
	460	fi
	461
b29c97b1 AF	462	exit ${ret}
	463	;;
	464
d0e5f71f	465	*)
b29c97b1	466	echo "Usage: $0 {start\|stop\|restart\|status\|update-forwarders\|test-name-server}"
b8f5eda8 MT	467	exit 1
b8f5eda8 MT	468	;;
d0e5f71f ML	469	esac
	470
	471	# End $rc_base/init.d/unbound