dnsmasq: export tftp root to the procd jail
[openwrt/staging/wigyori.git] / package / network / services / dnsmasq / files / dnsmasq.init
1 #!/bin/sh /etc/rc.common
2 # Copyright (C) 2007-2012 OpenWrt.org
3
4 START=60
5
6 USE_PROCD=1
7 PROG=/usr/sbin/dnsmasq
8
9 DNS_SERVERS=""
10 DOMAIN=""
11
12 ADD_LOCAL_DOMAIN=1
13 ADD_LOCAL_HOSTNAME=1
14
15 CONFIGFILE="/var/etc/dnsmasq.conf"
16 HOSTFILE="/tmp/hosts/dhcp"
17 TRUSTANCHORSFILE="/usr/share/dnsmasq/trust-anchors.conf"
18 TIMESTAMPFILE="/etc/dnsmasq.time"
19
20 xappend() {
21 local value="$1"
22
23 echo "${value#--}" >> $CONFIGFILE
24 }
25
26 dhcp_calc() {
27 local ip="$1"
28 local res=0
29
30 while [ -n "$ip" ]; do
31 part="${ip%%.*}"
32 res="$(($res * 256))"
33 res="$(($res + $part))"
34 [ "${ip%.*}" != "$ip" ] && ip="${ip#*.}" || ip=
35 done
36 echo "$res"
37 }
38
39 dhcp_check() {
40 local ifname="$1"
41 local stamp="/var/run/dnsmasq.$ifname.dhcp"
42 local rv=0
43
44 [ -s "$stamp" ] && return $(cat "$stamp")
45
46 udhcpc -n -q -s /bin/true -t 1 -i "$ifname" >&- && rv=1 || rv=0
47
48 [ $rv -eq 1 ] && \
49 logger -t dnsmasq \
50 "found already running DHCP-server on interface '$ifname'" \
51 "refusing to start, use 'option force 1' to override"
52
53 echo $rv > "$stamp"
54 return $rv
55 }
56
57 log_once() {
58 pidof dnsmasq >/dev/null || \
59 logger -t dnsmasq "$@"
60 }
61
62 append_bool() {
63 local section="$1"
64 local option="$2"
65 local value="$3"
66 local _loctmp
67 config_get_bool _loctmp "$section" "$option" 0
68 [ $_loctmp -gt 0 ] && xappend "$value"
69 }
70
71 append_parm() {
72 local section="$1"
73 local option="$2"
74 local switch="$3"
75 local _loctmp
76 config_get _loctmp "$section" "$option"
77 [ -z "$_loctmp" ] && return 0
78 xappend "$switch=$_loctmp"
79 }
80
81 append_server() {
82 xappend "--server=$1"
83 }
84
85 append_address() {
86 xappend "--address=$1"
87 }
88
89 append_ipset() {
90 xappend "--ipset=$1"
91 }
92
93 append_interface() {
94 local ifname=$(uci_get_state network "$1" ifname "$1")
95 xappend "--interface=$ifname"
96 }
97
98 append_notinterface() {
99 local ifname=$(uci_get_state network "$1" ifname "$1")
100 xappend "--except-interface=$ifname"
101 }
102
103 append_addnhosts() {
104 xappend "--addn-hosts=$1"
105 }
106
107 append_bogusnxdomain() {
108 xappend "--bogus-nxdomain=$1"
109 }
110
111 append_pxe_service() {
112 xappend "--pxe-service=$1"
113 }
114
115 dnsmasq() {
116 local cfg="$1"
117 append_bool "$cfg" authoritative "--dhcp-authoritative"
118 append_bool "$cfg" nodaemon "--no-daemon"
119 append_bool "$cfg" domainneeded "--domain-needed"
120 append_bool "$cfg" filterwin2k "--filterwin2k"
121 append_bool "$cfg" nohosts "--no-hosts"
122 append_bool "$cfg" nonegcache "--no-negcache"
123 append_bool "$cfg" strictorder "--strict-order"
124 append_bool "$cfg" logqueries "--log-queries=extra"
125 append_bool "$cfg" noresolv "--no-resolv"
126 append_bool "$cfg" localise_queries "--localise-queries"
127 append_bool "$cfg" readethers "--read-ethers"
128 append_bool "$cfg" dbus "--enable-dbus"
129 append_bool "$cfg" boguspriv "--bogus-priv"
130 append_bool "$cfg" expandhosts "--expand-hosts"
131 config_get tftp_root "$cfg" "tftp_root"
132 [ -d "$tftp_root" ] && append_bool "$cfg" enable_tftp "--enable-tftp"
133 append_bool "$cfg" tftp_no_fail "--tftp-no-fail"
134 append_bool "$cfg" nonwildcard "--bind-dynamic"
135 append_bool "$cfg" fqdn "--dhcp-fqdn"
136 append_bool "$cfg" proxydnssec "--proxy-dnssec"
137 append_bool "$cfg" localservice "--local-service"
138 append_bool "$cfg" quietdhcp "--quiet-dhcp"
139 append_bool "$cfg" sequential_ip "--dhcp-sequential-ip"
140 append_bool "$cfg" allservers "--all-servers"
141 append_bool "$cfg" noping "--no-ping"
142
143 append_parm "$cfg" dhcpscript "--dhcp-script"
144 append_parm "$cfg" cachesize "--cache-size"
145 append_parm "$cfg" dnsforwardmax "--dns-forward-max"
146 append_parm "$cfg" port "--port"
147 append_parm "$cfg" ednspacket_max "--edns-packet-max"
148 append_parm "$cfg" dhcpleasemax "--dhcp-lease-max"
149 append_parm "$cfg" "queryport" "--query-port"
150 append_parm "$cfg" "minport" "--min-port"
151 append_parm "$cfg" "domain" "--domain"
152 append_parm "$cfg" "local" "--server"
153 config_list_foreach "$cfg" "server" append_server
154 config_list_foreach "$cfg" "address" append_address
155 config_list_foreach "$cfg" "ipset" append_ipset
156 config_list_foreach "$cfg" "interface" append_interface
157 config_list_foreach "$cfg" "notinterface" append_notinterface
158 config_list_foreach "$cfg" "addnhosts" append_addnhosts
159 config_list_foreach "$cfg" "bogusnxdomain" append_bogusnxdomain
160 append_parm "$cfg" "leasefile" "--dhcp-leasefile"
161 append_parm "$cfg" "resolvfile" "--resolv-file"
162 append_parm "$cfg" "serversfile" "--servers-file"
163 append_parm "$cfg" "tftp_root" "--tftp-root"
164 append_parm "$cfg" "dhcp_boot" "--dhcp-boot"
165 append_parm "$cfg" "local_ttl" "--local-ttl"
166 append_parm "$cfg" "pxe_prompt" "--pxe-prompt"
167 config_list_foreach "$cfg" "pxe_service" append_pxe_service
168 config_get DOMAIN "$cfg" domain
169
170 config_get_bool ADD_LOCAL_DOMAIN "$cfg" add_local_domain 1
171 config_get_bool ADD_LOCAL_HOSTNAME "$cfg" add_local_hostname 1
172
173 config_get_bool readethers "$cfg" readethers
174 [ "$readethers" = "1" -a \! -e "/etc/ethers" ] && touch /etc/ethers
175
176 config_get leasefile $cfg leasefile
177 [ -n "$leasefile" -a \! -e "$leasefile" ] && touch "$leasefile"
178 config_get_bool cachelocal "$cfg" cachelocal 1
179
180 config_get hostsfile "$cfg" dhcphostsfile
181 [ -e "$hostsfile" ] && xappend "--dhcp-hostsfile=$hostsfile"
182
183 local rebind
184 config_get_bool rebind "$cfg" rebind_protection 1
185 [ $rebind -gt 0 ] && {
186 log_once \
187 "DNS rebinding protection is active," \
188 "will discard upstream RFC1918 responses!"
189 xappend "--stop-dns-rebind"
190
191 local rebind_localhost
192 config_get_bool rebind_localhost "$cfg" rebind_localhost 0
193 [ $rebind_localhost -gt 0 ] && {
194 log_once "Allowing 127.0.0.0/8 responses"
195 xappend "--rebind-localhost-ok"
196 }
197
198 append_rebind_domain() {
199 log_once "Allowing RFC1918 responses for domain $1"
200 xappend "--rebind-domain-ok=$1"
201 }
202
203 config_list_foreach "$cfg" rebind_domain append_rebind_domain
204 }
205
206 config_get_bool dnssec "$cfg" dnssec 0
207 [ "$dnssec" -gt 0 ] && {
208 xappend "--conf-file=$TRUSTANCHORSFILE"
209 xappend "--dnssec"
210 xappend "--dnssec-timestamp=$TIMESTAMPFILE"
211 append_bool "$cfg" dnsseccheckunsigned "--dnssec-check-unsigned"
212 }
213
214 dhcp_option_add "$cfg" "" 0
215
216 xappend "--dhcp-broadcast=tag:needs-broadcast"
217
218 mkdir -p /tmp/hosts /tmp/dnsmasq.d
219 xappend "--addn-hosts=/tmp/hosts"
220 xappend "--conf-dir=/tmp/dnsmasq.d"
221
222 echo >> $CONFIGFILE
223
224 config_get_bool enable_tftp "$cfg" enable_tftp 0
225 [ "$enable_tftp" -gt 0 ] && {
226 config_get tftp_root "$cfg" tftp_root
227 append EXTRA_MOUNT $tftp_root
228 }
229 }
230
231 dhcp_subscrid_add() {
232 local cfg="$1"
233
234 config_get networkid "$cfg" networkid
235 [ -n "$networkid" ] || return 0
236
237 config_get subscriberid "$cfg" subscriberid
238 [ -n "$subscriberid" ] || return 0
239
240 xappend "--dhcp-subscrid=$networkid,$subscriberid"
241
242 config_get_bool force "$cfg" force 0
243
244 dhcp_option_add "$cfg" "$networkid" "$force"
245 }
246
247 dhcp_remoteid_add() {
248 local cfg="$1"
249
250 config_get networkid "$cfg" networkid
251 [ -n "$networkid" ] || return 0
252
253 config_get remoteid "$cfg" remoteid
254 [ -n "$remoteid" ] || return 0
255
256 xappend "--dhcp-remoteid=$networkid,$remoteid"
257
258 config_get_bool force "$cfg" force 0
259
260 dhcp_option_add "$cfg" "$networkid" "$force"
261 }
262
263 dhcp_circuitid_add() {
264 local cfg="$1"
265
266 config_get networkid "$cfg" networkid
267 [ -n "$networkid" ] || return 0
268
269 config_get circuitid "$cfg" circuitid
270 [ -n "$circuitid" ] || return 0
271
272 xappend "--dhcp-circuitid=$networkid,$circuitid"
273
274 config_get_bool force "$cfg" force 0
275
276 dhcp_option_add "$cfg" "$networkid" "$force"
277 }
278
279 dhcp_userclass_add() {
280 local cfg="$1"
281
282 config_get networkid "$cfg" networkid
283 [ -n "$networkid" ] || return 0
284
285 config_get userclass "$cfg" userclass
286 [ -n "$userclass" ] || return 0
287
288 xappend "--dhcp-userclass=$networkid,$userclass"
289
290 config_get_bool force "$cfg" force 0
291
292 dhcp_option_add "$cfg" "$networkid" "$force"
293 }
294
295 dhcp_vendorclass_add() {
296 local cfg="$1"
297
298 config_get networkid "$cfg" networkid
299 [ -n "$networkid" ] || return 0
300
301 config_get vendorclass "$cfg" vendorclass
302 [ -n "$vendorclass" ] || return 0
303
304 xappend "--dhcp-vendorclass=$networkid,$vendorclass"
305
306 config_get_bool force "$cfg" force 0
307
308 dhcp_option_add "$cfg" "$networkid" "$force"
309 }
310
311 dhcp_host_add() {
312 local cfg="$1"
313
314 config_get_bool force "$cfg" force 0
315
316 config_get networkid "$cfg" networkid
317 [ -n "$networkid" ] && dhcp_option_add "$cfg" "$networkid" "$force"
318
319 config_get name "$cfg" name
320 config_get ip "$cfg" ip
321 [ -n "$ip" -o -n "$name" ] || return 0
322
323 config_get_bool dns "$cfg" dns 0
324 [ "$dns" = "1" -a -n "$ip" -a -n "$name" ] && {
325 echo "$ip $name${DOMAIN:+.$DOMAIN}" >> $HOSTFILE
326 }
327
328 config_get mac "$cfg" mac
329 if [ -n "$mac" ]; then
330 # --dhcp-host=00:20:e0:3b:13:af,192.168.0.199,lap
331 macs=""
332 for m in $mac; do append macs "$m" ","; done
333 else
334 # --dhcp-host=lap,192.168.0.199
335 [ -n "$name" ] || return 0
336 macs="$name"
337 name=""
338 fi
339
340 config_get tag "$cfg" tag
341
342 config_get_bool broadcast "$cfg" broadcast 0
343 [ "$broadcast" = "0" ] && broadcast=
344
345 xappend "--dhcp-host=$macs${networkid:+,net:$networkid}${broadcast:+,set:needs-broadcast}${tag:+,set:$tag}${ip:+,$ip}${name:+,$name}"
346 }
347
348 dhcp_tag_add() {
349 local cfg="$1"
350
351 tag="$cfg"
352
353 [ -n "$tag" ] || return 0
354
355 config_get_bool force "$cfg" force 0
356 [ "$force" = "0" ] && force=
357
358 config_get option "$cfg" dhcp_option
359 for o in $option; do
360 xappend "--dhcp-option${force:+-force}=tag:$tag,$o"
361 done
362 }
363
364 dhcp_mac_add() {
365 local cfg="$1"
366
367 config_get networkid "$cfg" networkid
368 [ -n "$networkid" ] || return 0
369
370 config_get mac "$cfg" mac
371 [ -n "$mac" ] || return 0
372
373 xappend "--dhcp-mac=$networkid,$mac"
374
375 dhcp_option_add "$cfg" "$networkid"
376 }
377
378 dhcp_boot_add() {
379 local cfg="$1"
380
381 config_get networkid "$cfg" networkid
382
383 config_get filename "$cfg" filename
384 [ -n "$filename" ] || return 0
385
386 config_get servername "$cfg" servername
387 config_get serveraddress "$cfg" serveraddress
388
389 [ -n "$serveraddress" -a ! -n "$servername" ] && return 0
390
391 xappend "--dhcp-boot=${networkid:+net:$networkid,}${filename}${servername:+,$servername}${serveraddress:+,$serveraddress}"
392
393 config_get_bool force "$cfg" force 0
394
395 dhcp_option_add "$cfg" "$networkid" "$force"
396 }
397
398
399 dhcp_add() {
400 local cfg="$1"
401 config_get net "$cfg" interface
402 [ -n "$net" ] || return 0
403
404 config_get dhcpv4 "$cfg" dhcpv4
405 [ "$dhcpv4" != "disabled" ] || return 0
406
407 config_get networkid "$cfg" networkid
408 [ -n "$networkid" ] || networkid="$net"
409
410 network_get_subnet subnet "$net" || return 0
411 network_get_device ifname "$net" || return 0
412 network_get_protocol proto "$net" || return 0
413
414 [ "$cachelocal" = "0" ] && network_get_dnsserver dnsserver "$net" && {
415 DNS_SERVERS="$DNS_SERVERS $dnsserver"
416 }
417
418 append_bool "$cfg" ignore "--no-dhcp-interface=$ifname" && return 0
419
420 # Do not support non-static interfaces for now
421 [ static = "$proto" ] || return 0
422
423 # Override interface netmask with dhcp config if applicable
424 config_get netmask "$cfg" netmask "${subnet##*/}"
425
426 #check for an already active dhcp server on the interface, unless 'force' is set
427 config_get_bool force "$cfg" force 0
428 [ $force -gt 0 ] || dhcp_check "$ifname" || return 0
429
430 config_get start "$cfg" start
431 config_get limit "$cfg" limit
432 config_get leasetime "$cfg" leasetime
433 config_get options "$cfg" options
434 config_get_bool dynamicdhcp "$cfg" dynamicdhcp 1
435
436 leasetime="${leasetime:-12h}"
437 start="$(dhcp_calc "${start:-100}")"
438 limit="${limit:-150}"
439 [ "$limit" -gt 0 ] && limit=$((limit-1))
440 eval "$(ipcalc.sh "${subnet%%/*}" $netmask $start $limit)"
441 if [ "$dynamicdhcp" = "0" ]; then END="static"; fi
442 xappend "--dhcp-range=$networkid,$START,$END,$NETMASK,$leasetime${options:+ $options}"
443
444 dhcp_option_add "$cfg" "$networkid"
445 }
446
447 dhcp_option_add() {
448 local cfg="$1"
449 local networkid="$2"
450 local force="$3"
451
452 [ "$force" = "0" ] && force=
453
454 config_get dhcp_option "$cfg" dhcp_option
455 for o in $dhcp_option; do
456 xappend "--dhcp-option${force:+-force}=${networkid:+$networkid,}$o"
457 done
458
459 }
460
461 dhcp_domain_add() {
462 local cfg="$1"
463 local ip name names record
464
465 config_get names "$cfg" name "$2"
466 [ -n "$names" ] || return 0
467
468 config_get ip "$cfg" ip "$3"
469 [ -n "$ip" ] || return 0
470
471 for name in $names; do
472 record="${record:+$record }$name"
473 done
474
475 echo "$ip $record" >> $HOSTFILE
476 }
477
478 dhcp_srv_add() {
479 local cfg="$1"
480
481 config_get srv "$cfg" srv
482 [ -n "$srv" ] || return 0
483
484 config_get target "$cfg" target
485 [ -n "$target" ] || return 0
486
487 config_get port "$cfg" port
488 [ -n "$port" ] || return 0
489
490 config_get class "$cfg" class
491 config_get weight "$cfg" weight
492
493 local service="$srv,$target,$port${class:+,$class${weight:+,$weight}}"
494
495 xappend "--srv-host=$service"
496 }
497
498 dhcp_mx_add() {
499 local cfg="$1"
500 local domain relay pref
501
502 config_get domain "$cfg" domain
503 [ -n "$domain" ] || return 0
504
505 config_get relay "$cfg" relay
506 [ -n "$relay" ] || return 0
507
508 config_get pref "$cfg" pref 0
509
510 local service="$domain,$relay,$pref"
511
512 xappend "--mx-host=$service"
513 }
514
515 dhcp_cname_add() {
516 local cfg="$1"
517 local cname target
518
519 config_get cname "$cfg" cname
520 [ -n "$cname" ] || return 0
521
522 config_get target "$cfg" target
523 [ -n "$target" ] || return 0
524
525 xappend "--cname=${cname},${target}"
526 }
527
528 dhcp_hostrecord_add() {
529 local cfg="$1"
530 local names addresses record val
531
532 config_get names "$cfg" name "$2"
533 if [ -z "$names" ]; then
534 return 0
535 fi
536
537 config_get addresses "$cfg" ip "$3"
538 if [ -z "$addresses" ]; then
539 return 0
540 fi
541
542 for val in $names $addresses; do
543 record="${record:+$record,}$val"
544 done
545
546 xappend "--host-record=$record"
547 }
548
549 service_triggers()
550 {
551 procd_add_reload_trigger "dhcp"
552 }
553
554 boot() {
555 # Will be launched through hotplug
556 return 0
557 }
558
559 start_service() {
560 include /lib/functions
561
562 config_load dhcp
563
564 # before we can call xappend
565 mkdir -p /var/run/dnsmasq/
566 mkdir -p $(dirname $CONFIGFILE)
567 mkdir -p /var/lib/misc
568 touch /tmp/dhcp.leases
569
570 if [ ! -f "$TIMESTAMPFILE" ]; then
571 touch "$TIMESTAMPFILE"
572 chown nobody.nogroup "$TIMESTAMPFILE"
573 fi
574
575 echo "# auto-generated config file from /etc/config/dhcp" > $CONFIGFILE
576 echo "# auto-generated config file from /etc/config/dhcp" > $HOSTFILE
577
578 # if we did this last, we could override auto-generated config
579 [ -f /etc/dnsmasq.conf ] && {
580 xappend "--conf-file=/etc/dnsmasq.conf"
581 }
582
583 args=""
584 config_foreach dnsmasq dnsmasq
585 config_foreach dhcp_host_add host
586 echo >> $CONFIGFILE
587 config_foreach dhcp_boot_add boot
588 config_foreach dhcp_mac_add mac
589 config_foreach dhcp_tag_add tag
590 config_foreach dhcp_vendorclass_add vendorclass
591 config_foreach dhcp_userclass_add userclass
592 config_foreach dhcp_circuitid_add circuitid
593 config_foreach dhcp_remoteid_add remoteid
594 config_foreach dhcp_subscrid_add subscrid
595 config_foreach dhcp_domain_add domain
596 config_foreach dhcp_hostrecord_add hostrecord
597
598 # add own hostname
599 [ $ADD_LOCAL_HOSTNAME -eq 1 ] && {
600 local lanaddr lanaddr6
601 local ulaprefix="$(uci_get network @globals[0] ula_prefix)"
602 local hostname="$(uci_get system @system[0] hostname OpenWrt)"
603
604 network_get_ipaddr lanaddr "lan" && {
605 dhcp_domain_add "" "$hostname" "$lanaddr"
606 }
607
608 [ -n "$ulaprefix" ] && network_get_ipaddrs6 lanaddr6 "lan" && {
609 for lanaddr6 in $lanaddr6; do
610 case "$lanaddr6" in
611 "${ulaprefix%%:/*}"*)
612 dhcp_domain_add "" "$hostname" "$lanaddr6"
613 ;;
614 esac
615 done
616 }
617 }
618
619 echo >> $CONFIGFILE
620 config_foreach dhcp_srv_add srvhost
621 config_foreach dhcp_mx_add mxhost
622 echo >> $CONFIGFILE
623
624 config_get odhcpd_is_active odhcpd maindhcp
625 if [ "$odhcpd_is_active" != "1" ]; then
626 config_foreach dhcp_add dhcp
627 fi
628
629 echo >> $CONFIGFILE
630 config_foreach dhcp_cname_add cname
631 echo >> $CONFIGFILE
632
633 rm -f /tmp/resolv.conf
634 [ $ADD_LOCAL_DOMAIN -eq 1 ] && [ -n "$DOMAIN" ] && {
635 echo "search $DOMAIN" >> /tmp/resolv.conf
636 }
637 DNS_SERVERS="$DNS_SERVERS 127.0.0.1"
638 for DNS_SERVER in $DNS_SERVERS ; do
639 echo "nameserver $DNS_SERVER" >> /tmp/resolv.conf
640 done
641
642 procd_open_instance
643 procd_set_param command $PROG -C $CONFIGFILE -k -x /var/run/dnsmasq/dnsmasq.pid
644 procd_set_param file $CONFIGFILE
645 procd_set_param respawn
646
647 procd_add_jail dnsmasq ubus log
648 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 $EXTRA_MOUNT
649 procd_add_jail_mount_rw /var/run/dnsmasq/ /tmp/dhcp.leases $TIMESTAMPFILE
650
651 procd_close_instance
652 }
653
654 reload_service() {
655 rc_procd start_service "$@"
656 return 0
657 }
658
659 stop_service() {
660 [ -f /tmp/resolv.conf ] && {
661 rm -f /tmp/resolv.conf
662 ln -s /tmp/resolv.conf.auto /tmp/resolv.conf
663 }
664 rm -f /var/run/dnsmasq.*.dhcp
665 }