summaryrefslogtreecommitdiff
path: root/package/network/services/dnsmasq/files/dnsmasq.init
blob: db342e7c8eb9e55f41281adf82a0bfe9cbe4e8f3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
#!/bin/sh /etc/rc.common
# Copyright (C) 2007-2012 OpenWrt.org

START=60

USE_PROCD=1
PROG=/usr/sbin/dnsmasq

DNS_SERVERS=""
DOMAIN=""

ADD_LOCAL_DOMAIN=1
ADD_LOCAL_HOSTNAME=1

CONFIGFILE="/var/etc/dnsmasq.conf"
HOSTFILE="/tmp/hosts/dhcp"
TRUSTANCHORSFILE="/usr/share/dnsmasq/trust-anchors.conf"
TIMESTAMPFILE="/etc/dnsmasq.time"

xappend() {
	local value="$1"

	echo "${value#--}" >> $CONFIGFILE
}

dhcp_calc() {
	local ip="$1"
	local res=0

	while [ -n "$ip" ]; do
		part="${ip%%.*}"
		res="$(($res * 256))"
		res="$(($res + $part))"
		[ "${ip%.*}" != "$ip" ] && ip="${ip#*.}" || ip=
	done
	echo "$res"
}

dhcp_check() {
	local ifname="$1"
	local stamp="/var/run/dnsmasq.$ifname.dhcp"
	local rv=0

	[ -s "$stamp" ] && return $(cat "$stamp")

	udhcpc -n -q -s /bin/true -t 1 -i "$ifname" >&- && rv=1 || rv=0

	[ $rv -eq 1 ] && \
		logger -t dnsmasq \
			"found already running DHCP-server on interface '$ifname'" \
			"refusing to start, use 'option force 1' to override"

	echo $rv > "$stamp"
	return $rv
}

log_once() {
	pidof dnsmasq >/dev/null || \
		logger -t dnsmasq "$@"
}

append_bool() {
	local section="$1"
	local option="$2"
	local value="$3"
	local _loctmp
	config_get_bool _loctmp "$section" "$option" 0
	[ $_loctmp -gt 0 ] && xappend "$value"
}

append_parm() {
	local section="$1"
	local option="$2"
	local switch="$3"
	local _loctmp
	config_get _loctmp "$section" "$option"
	[ -z "$_loctmp" ] && return 0
	xappend "$switch=$_loctmp"
}

append_server() {
	xappend "--server=$1"
}

append_address() {
	xappend "--address=$1"
}

append_ipset() {
	xappend "--ipset=$1"
}

append_interface() {
	local ifname=$(uci_get_state network "$1" ifname "$1")
	xappend "--interface=$ifname"
}

append_notinterface() {
	local ifname=$(uci_get_state network "$1" ifname "$1")
	xappend "--except-interface=$ifname"
}

append_addnhosts() {
	xappend "--addn-hosts=$1"
}

append_bogusnxdomain() {
	xappend "--bogus-nxdomain=$1"
}

append_pxe_service() {
	xappend "--pxe-service=$1"
}

dnsmasq() {
	local cfg="$1"
	append_bool "$cfg" authoritative "--dhcp-authoritative"
	append_bool "$cfg" nodaemon "--no-daemon"
	append_bool "$cfg" domainneeded "--domain-needed"
	append_bool "$cfg" filterwin2k "--filterwin2k"
	append_bool "$cfg" nohosts "--no-hosts"
	append_bool "$cfg" nonegcache "--no-negcache"
	append_bool "$cfg" strictorder "--strict-order"
	append_bool "$cfg" logqueries "--log-queries=extra"
	append_bool "$cfg" noresolv "--no-resolv"
	append_bool "$cfg" localise_queries "--localise-queries"
	append_bool "$cfg" readethers "--read-ethers"
	append_bool "$cfg" dbus "--enable-dbus"
	append_bool "$cfg" boguspriv "--bogus-priv"
	append_bool "$cfg" expandhosts "--expand-hosts"
	append_bool "$cfg" enable_tftp "--enable-tftp"
	append_bool "$cfg" tftp_no_fail "--tftp-no-fail"
	append_bool "$cfg" nonwildcard "--bind-dynamic"
	append_bool "$cfg" fqdn "--dhcp-fqdn"
	append_bool "$cfg" proxydnssec "--proxy-dnssec"
	append_bool "$cfg" localservice "--local-service"
	append_bool "$cfg" quietdhcp "--quiet-dhcp"
	append_bool "$cfg" sequential_ip "--dhcp-sequential-ip"
	append_bool "$cfg" allservers "--all-servers"
	append_bool "$cfg" noping "--no-ping"

	append_parm "$cfg" dhcpscript "--dhcp-script"
	append_parm "$cfg" cachesize "--cache-size"
	append_parm "$cfg" dnsforwardmax "--dns-forward-max"
	append_parm "$cfg" port "--port"
	append_parm "$cfg" ednspacket_max "--edns-packet-max"
	append_parm "$cfg" dhcpleasemax "--dhcp-lease-max"
	append_parm "$cfg" "queryport" "--query-port"
	append_parm "$cfg" "minport" "--min-port"
	append_parm "$cfg" "domain" "--domain"
	append_parm "$cfg" "local" "--server"
	config_list_foreach "$cfg" "server" append_server
	config_list_foreach "$cfg" "address" append_address
	config_list_foreach "$cfg" "ipset" append_ipset
	config_list_foreach "$cfg" "interface" append_interface
	config_list_foreach "$cfg" "notinterface" append_notinterface
	config_list_foreach "$cfg" "addnhosts" append_addnhosts
	config_list_foreach "$cfg" "bogusnxdomain" append_bogusnxdomain
	append_parm "$cfg" "leasefile" "--dhcp-leasefile"
	append_parm "$cfg" "resolvfile" "--resolv-file"
	append_parm "$cfg" "serversfile" "--servers-file"
	append_parm "$cfg" "tftp_root" "--tftp-root"
	append_parm "$cfg" "dhcp_boot" "--dhcp-boot"
	append_parm "$cfg" "local_ttl" "--local-ttl"
	append_parm "$cfg" "pxe_prompt" "--pxe-prompt"
	config_list_foreach "$cfg" "pxe_service" append_pxe_service
	config_get DOMAIN "$cfg" domain

	config_get_bool ADD_LOCAL_DOMAIN "$cfg" add_local_domain 1
	config_get_bool ADD_LOCAL_HOSTNAME "$cfg" add_local_hostname 1

	config_get_bool readethers "$cfg" readethers
	[ "$readethers" = "1" -a \! -e "/etc/ethers" ] && touch /etc/ethers

	config_get leasefile $cfg leasefile
	[ -n "$leasefile" -a \! -e "$leasefile" ] && touch "$leasefile"
	config_get_bool cachelocal "$cfg" cachelocal 1

	config_get hostsfile "$cfg" dhcphostsfile
	[ -e "$hostsfile" ] && xappend "--dhcp-hostsfile=$hostsfile"

	local rebind
	config_get_bool rebind "$cfg" rebind_protection 1
	[ $rebind -gt 0 ] && {
		log_once \
			"DNS rebinding protection is active," \
			"will discard upstream RFC1918 responses!"
		xappend "--stop-dns-rebind"

		local rebind_localhost
		config_get_bool rebind_localhost "$cfg" rebind_localhost 0
		[ $rebind_localhost -gt 0 ] && {
			log_once "Allowing 127.0.0.0/8 responses"
			xappend "--rebind-localhost-ok"
		}

		append_rebind_domain() {
			log_once "Allowing RFC1918 responses for domain $1"
			xappend "--rebind-domain-ok=$1"
		}

		config_list_foreach "$cfg" rebind_domain append_rebind_domain
	}

	config_get_bool dnssec "$cfg" dnssec 0
	[ "$dnssec" -gt 0 ] && {
		xappend "--conf-file=$TRUSTANCHORSFILE"
		xappend "--dnssec"
		xappend "--dnssec-timestamp=$TIMESTAMPFILE"
		append_bool "$cfg" dnsseccheckunsigned "--dnssec-check-unsigned"
	}

	dhcp_option_add "$cfg" "" 0

	xappend "--dhcp-broadcast=tag:needs-broadcast"

	mkdir -p /tmp/hosts /tmp/dnsmasq.d
	xappend "--addn-hosts=/tmp/hosts"
	xappend "--conf-dir=/tmp/dnsmasq.d"

	echo >> $CONFIGFILE
}

dhcp_subscrid_add() {
	local cfg="$1"

	config_get networkid "$cfg" networkid
	[ -n "$networkid" ] || return 0

	config_get subscriberid "$cfg" subscriberid
	[ -n "$subscriberid" ] || return 0

	xappend "--dhcp-subscrid=$networkid,$subscriberid"

	config_get_bool force "$cfg" force 0

	dhcp_option_add "$cfg" "$networkid" "$force"
}

dhcp_remoteid_add() {
	local cfg="$1"

	config_get networkid "$cfg" networkid
	[ -n "$networkid" ] || return 0

	config_get remoteid "$cfg" remoteid
	[ -n "$remoteid" ] || return 0

	xappend "--dhcp-remoteid=$networkid,$remoteid"

	config_get_bool force "$cfg" force 0

	dhcp_option_add "$cfg" "$networkid" "$force"
}

dhcp_circuitid_add() {
	local cfg="$1"

	config_get networkid "$cfg" networkid
	[ -n "$networkid" ] || return 0

	config_get circuitid "$cfg" circuitid
	[ -n "$circuitid" ] || return 0

	xappend "--dhcp-circuitid=$networkid,$circuitid"

	config_get_bool force "$cfg" force 0

	dhcp_option_add "$cfg" "$networkid" "$force"
}

dhcp_userclass_add() {
	local cfg="$1"

	config_get networkid "$cfg" networkid
	[ -n "$networkid" ] || return 0

	config_get userclass "$cfg" userclass
	[ -n "$userclass" ] || return 0

	xappend "--dhcp-userclass=$networkid,$userclass"

	config_get_bool force "$cfg" force 0

	dhcp_option_add "$cfg" "$networkid" "$force"
}

dhcp_vendorclass_add() {
	local cfg="$1"

	config_get networkid "$cfg" networkid
	[ -n "$networkid" ] || return 0

	config_get vendorclass "$cfg" vendorclass
	[ -n "$vendorclass" ] || return 0

	xappend "--dhcp-vendorclass=$networkid,$vendorclass"

	config_get_bool force "$cfg" force 0

	dhcp_option_add "$cfg" "$networkid" "$force"
}

dhcp_host_add() {
	local cfg="$1"

	config_get_bool force "$cfg" force 0

	config_get networkid "$cfg" networkid
	[ -n "$networkid" ] && dhcp_option_add "$cfg" "$networkid" "$force"

	config_get name "$cfg" name
	config_get ip "$cfg" ip
	[ -n "$ip" -o -n "$name" ] || return 0

	config_get_bool dns "$cfg" dns 0
	[ "$dns" = "1" -a -n "$ip" -a -n "$name" ] && {
		echo "$ip $name${DOMAIN:+.$DOMAIN}" >> $HOSTFILE
	}

	config_get mac "$cfg" mac
	if [ -n "$mac" ]; then
		# --dhcp-host=00:20:e0:3b:13:af,192.168.0.199,lap
		macs=""
		for m in $mac; do append macs "$m" ","; done
	else
		# --dhcp-host=lap,192.168.0.199
		[ -n "$name" ] || return 0
		macs="$name"
		name=""
	fi

	config_get tag "$cfg" tag

	config_get_bool broadcast "$cfg" broadcast 0
	[ "$broadcast" = "0" ] && broadcast=

	xappend "--dhcp-host=$macs${networkid:+,net:$networkid}${broadcast:+,set:needs-broadcast}${tag:+,set:$tag}${ip:+,$ip}${name:+,$name}"
}

dhcp_tag_add() {
	local cfg="$1"

	tag="$cfg"

	[ -n "$tag" ] || return 0

	config_get_bool force "$cfg" force 0
	[ "$force" = "0" ] && force=

	config_get option "$cfg" dhcp_option
	for o in $option; do
		xappend "--dhcp-option${force:+-force}=tag:$tag,$o"
	done
}

dhcp_mac_add() {
	local cfg="$1"

	config_get networkid "$cfg" networkid
	[ -n "$networkid" ] || return 0

	config_get mac "$cfg" mac
	[ -n "$mac" ] || return 0

	xappend "--dhcp-mac=$networkid,$mac"

	dhcp_option_add "$cfg" "$networkid"
}

dhcp_boot_add() {
	local cfg="$1"

	config_get networkid "$cfg" networkid

	config_get filename "$cfg" filename
	[ -n "$filename" ] || return 0

	config_get servername "$cfg" servername
	config_get serveraddress "$cfg" serveraddress

	[ -n "$serveraddress" -a ! -n "$servername" ] && return 0

	xappend "--dhcp-boot=${networkid:+net:$networkid,}${filename}${servername:+,$servername}${serveraddress:+,$serveraddress}"

	config_get_bool force "$cfg" force 0

	dhcp_option_add "$cfg" "$networkid" "$force"
}


dhcp_add() {
	local cfg="$1"
	config_get net "$cfg" interface
	[ -n "$net" ] || return 0

	config_get dhcpv4 "$cfg" dhcpv4
	[ "$dhcpv4" != "disabled" ] || return 0

	config_get networkid "$cfg" networkid
	[ -n "$networkid" ] || networkid="$net"

	network_get_subnet subnet "$net" || return 0
	network_get_device ifname "$net" || return 0
	network_get_protocol proto "$net" || return 0

	[ "$cachelocal" = "0" ] && network_get_dnsserver dnsserver "$net" && {
		DNS_SERVERS="$DNS_SERVERS $dnsserver"
	}

	append_bool "$cfg" ignore "--no-dhcp-interface=$ifname" && return 0

	# Do not support non-static interfaces for now
	[ static = "$proto" ] || return 0

	# Override interface netmask with dhcp config if applicable
	config_get netmask "$cfg" netmask "${subnet##*/}"

	#check for an already active dhcp server on the interface, unless 'force' is set
	config_get_bool force "$cfg" force 0
	[ $force -gt 0 ] || dhcp_check "$ifname" || return 0

	config_get start "$cfg" start
	config_get limit "$cfg" limit
	config_get leasetime "$cfg" leasetime
	config_get options "$cfg" options
	config_get_bool dynamicdhcp "$cfg" dynamicdhcp 1

	leasetime="${leasetime:-12h}"
	start="$(dhcp_calc "${start:-100}")"
	limit="${limit:-150}"
	[ "$limit" -gt 0 ] && limit=$((limit-1))
	eval "$(ipcalc.sh "${subnet%%/*}" $netmask $start $limit)"
	if [ "$dynamicdhcp" = "0" ]; then END="static"; fi
	xappend "--dhcp-range=$networkid,$START,$END,$NETMASK,$leasetime${options:+ $options}"

	dhcp_option_add "$cfg" "$networkid"
}

dhcp_option_add() {
	local cfg="$1"
	local networkid="$2"
	local force="$3"

	[ "$force" = "0" ] && force=

	config_get dhcp_option "$cfg" dhcp_option
	for o in $dhcp_option; do
		xappend "--dhcp-option${force:+-force}=${networkid:+$networkid,}$o"
	done

}

dhcp_domain_add() {
	local cfg="$1"
	local ip name names record

	config_get names "$cfg" name "$2"
	[ -n "$names" ] || return 0

	config_get ip "$cfg" ip "$3"
	[ -n "$ip" ] || return 0

	for name in $names; do
		record="${record:+$record }$name"
	done

	echo "$ip $record" >> $HOSTFILE
}

dhcp_srv_add() {
	local cfg="$1"

	config_get srv "$cfg" srv
	[ -n "$srv" ] || return 0

	config_get target "$cfg" target
	[ -n "$target" ] || return 0

	config_get port "$cfg" port
	[ -n "$port" ] || return 0

	config_get class "$cfg" class
	config_get weight "$cfg" weight

	local service="$srv,$target,$port${class:+,$class${weight:+,$weight}}"

	xappend "--srv-host=$service"
}

dhcp_mx_add() {
	local cfg="$1"
	local domain relay pref

	config_get domain "$cfg" domain
	[ -n "$domain" ] || return 0

	config_get relay "$cfg" relay
	[ -n "$relay" ] || return 0

	config_get pref "$cfg" pref 0

	local service="$domain,$relay,$pref"

	xappend "--mx-host=$service"
}

dhcp_cname_add() {
	local cfg="$1"
	local cname target

	config_get cname "$cfg" cname
	[ -n "$cname" ] || return 0

	config_get target "$cfg" target
	[ -n "$target" ] || return 0

	xappend "--cname=${cname},${target}"
}

dhcp_hostrecord_add() {
	local cfg="$1"
	local names addresses record val

	config_get names "$cfg" name "$2"
	if [ -z "$names" ]; then
		return 0
	fi

	config_get addresses "$cfg" ip "$3"
	if [ -z "$addresses" ]; then
		return 0
	fi

	for val in $names $addresses; do
		record="${record:+$record,}$val"
	done

	xappend "--host-record=$record"
}

service_triggers()
{
	procd_add_reload_trigger "dhcp"
}

boot() {
	# Will be launched through hotplug
	return 0
}

start_service() {
	include /lib/functions

	config_load dhcp

	procd_open_instance
	procd_set_param command $PROG -C $CONFIGFILE -k -x /var/run/dnsmasq/dnsmasq.pid
	procd_set_param file $CONFIGFILE
	procd_set_param respawn

	procd_add_jail dnsmasq ubus log
	procd_add_jail_mount $CONFIGFILE $TRUSTANCHORSFILE $HOSTFILE /etc/passwd /etc/group /etc/TZ /dev/null /dev/urandom /etc/dnsmasq.conf /tmp/dnsmasq.d /tmp/resolv.conf.auto /etc/hosts /etc/ethers
	procd_add_jail_mount_rw /var/run/dnsmasq/ /tmp/dhcp.leases $TIMESTAMPFILE
	
	procd_close_instance

	# before we can call xappend
	mkdir -p /var/run/dnsmasq/
	mkdir -p $(dirname $CONFIGFILE)
	mkdir -p /var/lib/misc
	touch /tmp/dhcp.leases

	if [ ! -f "$TIMESTAMPFILE" ]; then
		touch "$TIMESTAMPFILE"
		chown nobody.nogroup "$TIMESTAMPFILE"
	fi

	echo "# auto-generated config file from /etc/config/dhcp" > $CONFIGFILE
	echo "# auto-generated config file from /etc/config/dhcp" > $HOSTFILE

	# if we did this last, we could override auto-generated config
	[ -f /etc/dnsmasq.conf ] && {
		xappend "--conf-file=/etc/dnsmasq.conf"
	}

	args=""
	config_foreach dnsmasq dnsmasq
	config_foreach dhcp_host_add host
	echo >> $CONFIGFILE
	config_foreach dhcp_boot_add boot
	config_foreach dhcp_mac_add mac
	config_foreach dhcp_tag_add tag
	config_foreach dhcp_vendorclass_add vendorclass
	config_foreach dhcp_userclass_add userclass
	config_foreach dhcp_circuitid_add circuitid
	config_foreach dhcp_remoteid_add remoteid
	config_foreach dhcp_subscrid_add subscrid
	config_foreach dhcp_domain_add domain
	config_foreach dhcp_hostrecord_add hostrecord

	# add own hostname
	[ $ADD_LOCAL_HOSTNAME -eq 1 ] && {
		local lanaddr lanaddr6
		local ulaprefix="$(uci_get network @globals[0] ula_prefix)"
		local hostname="$(uci_get system @system[0] hostname OpenWrt)"

		network_get_ipaddr lanaddr "lan" && {
			dhcp_domain_add "" "$hostname" "$lanaddr"
		}

		[ -n "$ulaprefix" ] && network_get_ipaddrs6 lanaddr6 "lan" && {
			for lanaddr6 in $lanaddr6; do
				case "$lanaddr6" in
					"${ulaprefix%%:/*}"*)
						dhcp_domain_add "" "$hostname" "$lanaddr6"
					;;
				esac
			done
		}
	}

	echo >> $CONFIGFILE
	config_foreach dhcp_srv_add srvhost
	config_foreach dhcp_mx_add mxhost
	echo >> $CONFIGFILE

	config_get odhcpd_is_active odhcpd maindhcp
	if [ "$odhcpd_is_active" != "1" ]; then
		config_foreach dhcp_add dhcp
	fi

	echo >> $CONFIGFILE
	config_foreach dhcp_cname_add cname
	echo >> $CONFIGFILE

	rm -f /tmp/resolv.conf
	[ $ADD_LOCAL_DOMAIN -eq 1 ] && [ -n "$DOMAIN" ] && {
		echo "search $DOMAIN" >> /tmp/resolv.conf
	}
	DNS_SERVERS="$DNS_SERVERS 127.0.0.1"
	for DNS_SERVER in $DNS_SERVERS ; do
		echo "nameserver $DNS_SERVER" >> /tmp/resolv.conf
	done
}

reload_service() {
	rc_procd start_service "$@"
	return 0
}

stop_service() {
	[ -f /tmp/resolv.conf ] && {
		rm -f /tmp/resolv.conf
		ln -s /tmp/resolv.conf.auto /tmp/resolv.conf
	}
	rm -f /var/run/dnsmasq.*.dhcp
}