dnsmasq.init 29 KB

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  1. #!/bin/sh /etc/rc.common
  2. # Copyright (C) 2007-2012 OpenWrt.org
  3. START=19
  4. USE_PROCD=1
  5. PROG=/usr/sbin/dnsmasq
  6. ADD_LOCAL_DOMAIN=1
  7. ADD_LOCAL_HOSTNAME=1
  8. ADD_WAN_FQDN=0
  9. ADD_LOCAL_FQDN=""
  10. BASECONFIGFILE="/var/etc/dnsmasq.conf"
  11. BASEHOSTFILE="/tmp/hosts/dhcp"
  12. TRUSTANCHORSFILE="/usr/share/dnsmasq/trust-anchors.conf"
  13. TIMEVALIDFILE="/var/state/dnsmasqsec"
  14. BASEDHCPSTAMPFILE="/var/run/dnsmasq"
  15. DHCPBOGUSHOSTNAMEFILE="/usr/share/dnsmasq/dhcpbogushostname.conf"
  16. RFC6761FILE="/usr/share/dnsmasq/rfc6761.conf"
  17. DHCPSCRIPT="/usr/lib/dnsmasq/dhcp-script.sh"
  18. DNSMASQ_DHCP_VER=4
  19. dnsmasq_ignore_opt() {
  20. local opt="$1"
  21. if [ -z "$dnsmasq_features" ]; then
  22. dnsmasq_features="$(dnsmasq --version | grep -m1 'Compile time options:' | cut -d: -f2) "
  23. [ "${dnsmasq_features#* DHCP }" = "$dnsmasq_features" ] || dnsmasq_has_dhcp=1
  24. [ "${dnsmasq_features#* DHCPv6 }" = "$dnsmasq_features" ] || dnsmasq_has_dhcp6=1
  25. [ "${dnsmasq_features#* DNSSEC }" = "$dnsmasq_features" ] || dnsmasq_has_dnssec=1
  26. [ "${dnsmasq_features#* TFTP }" = "$dnsmasq_features" ] || dnsmasq_has_tftp=1
  27. [ "${dnsmasq_features#* ipset }" = "$dnsmasq_features" ] || dnsmasq_has_ipset=1
  28. fi
  29. case "$opt" in
  30. dhcp-duid|\
  31. ra-param)
  32. [ -z "$dnsmasq_has_dhcp6" ] ;;
  33. dhcp-*|\
  34. bootp-*|\
  35. pxe-*)
  36. [ -z "$dnsmasq_has_dhcp" ] ;;
  37. dnssec-*|\
  38. trust-anchor)
  39. [ -z "$dnsmasq_has_dnssec" ] ;;
  40. tftp-*)
  41. [ -z "$dnsmasq_has_tftp" ] ;;
  42. ipset)
  43. [ -z "$dnsmasq_has_ipset" ] ;;
  44. *)
  45. return 1
  46. esac
  47. }
  48. xappend() {
  49. local value="${1#--}"
  50. local opt="${value%%=*}"
  51. if ! dnsmasq_ignore_opt "$opt"; then
  52. echo "$value" >>$CONFIGFILE_TMP
  53. fi
  54. }
  55. hex_to_hostid() {
  56. local var="$1"
  57. local hex="${2#0x}" # strip optional "0x" prefix
  58. if [ -n "${hex//[0-9a-fA-F]/}" ]; then
  59. # is invalid hex literal
  60. return 1
  61. fi
  62. # convert into host id
  63. export "$var=$(
  64. printf "%0x:%0x" \
  65. $(((0x$hex >> 16) % 65536)) \
  66. $(( 0x$hex % 65536))
  67. )"
  68. return 0
  69. }
  70. dhcp_calc() {
  71. local ip="$1"
  72. local res=0
  73. while [ -n "$ip" ]; do
  74. part="${ip%%.*}"
  75. res="$(($res * 256))"
  76. res="$(($res + $part))"
  77. [ "${ip%.*}" != "$ip" ] && ip="${ip#*.}" || ip=
  78. done
  79. echo "$res"
  80. }
  81. dhcp_check() {
  82. local ifname="$1"
  83. local stamp="${BASEDHCPSTAMPFILE_CFG}.${ifname}.dhcp"
  84. local rv=0
  85. [ -s "$stamp" ] && return $(cat "$stamp")
  86. # If there's no carrier yet, skip this interface.
  87. # The init script will be called again once the link is up
  88. case "$(devstatus "$ifname" | jsonfilter -e @.carrier)" in
  89. false) return 1;;
  90. esac
  91. udhcpc -n -q -s /bin/true -t 1 -i "$ifname" >&- && rv=1 || rv=0
  92. [ $rv -eq 1 ] && \
  93. logger -t dnsmasq \
  94. "found already running DHCP-server on interface '$ifname'" \
  95. "refusing to start, use 'option force 1' to override"
  96. echo $rv > "$stamp"
  97. return $rv
  98. }
  99. log_once() {
  100. pidof dnsmasq >/dev/null || \
  101. logger -t dnsmasq "$@"
  102. }
  103. has_handler() {
  104. local file
  105. for file in /etc/hotplug.d/dhcp/* /etc/hotplug.d/tftp/* /etc/hotplug.d/neigh/*; do
  106. [ -f "$file" ] && return 0
  107. done
  108. return 1
  109. }
  110. append_bool() {
  111. local section="$1"
  112. local option="$2"
  113. local value="$3"
  114. local default="$4"
  115. local _loctmp
  116. [ -z "$default" ] && default="0"
  117. config_get_bool _loctmp "$section" "$option" "$default"
  118. [ $_loctmp -gt 0 ] && xappend "$value"
  119. }
  120. append_parm() {
  121. local section="$1"
  122. local option="$2"
  123. local switch="$3"
  124. local default="$4"
  125. local _loctmp
  126. config_get _loctmp "$section" "$option" "$default"
  127. [ -z "$_loctmp" ] && return 0
  128. xappend "$switch=$_loctmp"
  129. }
  130. append_server() {
  131. xappend "--server=$1"
  132. }
  133. append_rev_server() {
  134. xappend "--rev-server=$1"
  135. }
  136. append_address() {
  137. xappend "--address=$1"
  138. }
  139. append_ipset() {
  140. xappend "--ipset=$1"
  141. }
  142. append_interface() {
  143. network_get_device ifname "$1" || ifname="$1"
  144. xappend "--interface=$ifname"
  145. }
  146. append_listenaddress() {
  147. xappend "--listen-address=$1"
  148. }
  149. append_notinterface() {
  150. network_get_device ifname "$1" || ifname="$1"
  151. xappend "--except-interface=$ifname"
  152. }
  153. append_addnhosts() {
  154. xappend "--addn-hosts=$1"
  155. }
  156. append_bogusnxdomain() {
  157. xappend "--bogus-nxdomain=$1"
  158. }
  159. append_pxe_service() {
  160. xappend "--pxe-service=$1"
  161. }
  162. append_interface_name() {
  163. xappend "--interface-name=$1,$2"
  164. }
  165. filter_dnsmasq() {
  166. local cfg="$1" func="$2" match_cfg="$3" found_cfg
  167. # use entry when no instance entry set, or if it matches
  168. config_get found_cfg "$cfg" "instance"
  169. if [ -z "$found_cfg" -o "$found_cfg" = "$match_cfg" ]; then
  170. $func $cfg
  171. fi
  172. }
  173. dhcp_subscrid_add() {
  174. local cfg="$1"
  175. config_get networkid "$cfg" networkid
  176. [ -n "$networkid" ] || return 0
  177. config_get subscriberid "$cfg" subscriberid
  178. [ -n "$subscriberid" ] || return 0
  179. xappend "--dhcp-subscrid=$networkid,$subscriberid"
  180. config_get_bool force "$cfg" force 0
  181. dhcp_option_add "$cfg" "$networkid" "$force"
  182. }
  183. dhcp_remoteid_add() {
  184. local cfg="$1"
  185. config_get networkid "$cfg" networkid
  186. [ -n "$networkid" ] || return 0
  187. config_get remoteid "$cfg" remoteid
  188. [ -n "$remoteid" ] || return 0
  189. xappend "--dhcp-remoteid=$networkid,$remoteid"
  190. config_get_bool force "$cfg" force 0
  191. dhcp_option_add "$cfg" "$networkid" "$force"
  192. }
  193. dhcp_circuitid_add() {
  194. # TODO: DHCPV6 does not have circuitid; catch "option6:"
  195. local cfg="$1"
  196. config_get networkid "$cfg" networkid
  197. [ -n "$networkid" ] || return 0
  198. config_get circuitid "$cfg" circuitid
  199. [ -n "$circuitid" ] || return 0
  200. xappend "--dhcp-circuitid=$networkid,$circuitid"
  201. config_get_bool force "$cfg" force 0
  202. dhcp_option_add "$cfg" "$networkid" "$force"
  203. }
  204. dhcp_userclass_add() {
  205. local cfg="$1"
  206. config_get networkid "$cfg" networkid
  207. [ -n "$networkid" ] || return 0
  208. config_get userclass "$cfg" userclass
  209. [ -n "$userclass" ] || return 0
  210. xappend "--dhcp-userclass=$networkid,$userclass"
  211. config_get_bool force "$cfg" force 0
  212. dhcp_option_add "$cfg" "$networkid" "$force"
  213. }
  214. dhcp_vendorclass_add() {
  215. # TODO: DHCPV6 vendor class has stricter definitions; catch? fixup?
  216. local cfg="$1"
  217. config_get networkid "$cfg" networkid
  218. [ -n "$networkid" ] || return 0
  219. config_get vendorclass "$cfg" vendorclass
  220. [ -n "$vendorclass" ] || return 0
  221. xappend "--dhcp-vendorclass=$networkid,$vendorclass"
  222. config_get_bool force "$cfg" force 0
  223. dhcp_option_add "$cfg" "$networkid" "$force"
  224. }
  225. dhcp_match_add() {
  226. local cfg="$1"
  227. config_get networkid "$cfg" networkid
  228. [ -n "$networkid" ] || return 0
  229. config_get match "$cfg" match
  230. [ -n "$match" ] || return 0
  231. xappend "--dhcp-match=$networkid,$match"
  232. config_get_bool force "$cfg" force 0
  233. dhcp_option_add "$cfg" "$networkid" "$force"
  234. }
  235. dhcp_host_add() {
  236. local cfg="$1"
  237. local hosttag nametime addrs duids macs tags
  238. config_get_bool force "$cfg" force 0
  239. config_get networkid "$cfg" networkid
  240. [ -n "$networkid" ] && dhcp_option_add "$cfg" "$networkid" "$force"
  241. config_get_bool enable "$cfg" enable 1
  242. [ "$enable" = "0" ] && return 0
  243. config_get name "$cfg" name
  244. config_get ip "$cfg" ip
  245. config_get hostid "$cfg" hostid
  246. [ -n "$ip" -o -n "$name" -o -n "$hostid" ] || return 0
  247. config_get_bool dns "$cfg" dns 0
  248. [ "$dns" = "1" -a -n "$ip" -a -n "$name" ] && {
  249. echo "$ip $name${DOMAIN:+.$DOMAIN}" >> $HOSTFILE_TMP
  250. }
  251. config_get mac "$cfg" mac
  252. config_get duid "$cfg" duid
  253. config_get tag "$cfg" tag
  254. if [ -n "$mac" ]; then
  255. # --dhcp-host=00:20:e0:3b:13:af,192.168.0.199,lap
  256. # many MAC are possible to track a laptop ON/OFF dock
  257. for m in $mac; do append macs "$m" ","; done
  258. fi
  259. if [ $DNSMASQ_DHCP_VER -eq 6 -a -n "$duid" ]; then
  260. # --dhcp-host=id:00:03:00:01:12:00:00:01:02:03,[::beef],lap
  261. # one (virtual) machine gets one DUID per RFC3315
  262. duids="id:${duid// */}"
  263. fi
  264. if [ -z "$macs" -a -z "$duids" ]; then
  265. # --dhcp-host=lap,192.168.0.199,[::beef]
  266. [ -n "$name" ] || return 0
  267. macs="$name"
  268. name=""
  269. fi
  270. if [ -n "$hostid" ]; then
  271. hex_to_hostid hostid "$hostid"
  272. fi
  273. if [ -n "$tag" ]; then
  274. for t in $tag; do append tags "$t" ",set:"; done
  275. fi
  276. config_get_bool broadcast "$cfg" broadcast 0
  277. config_get leasetime "$cfg" leasetime
  278. [ "$broadcast" = "0" ] && broadcast= || broadcast=",set:needs-broadcast"
  279. hosttag="${networkid:+,set:${networkid}}${tags:+,set:${tags}}$broadcast"
  280. nametime="${name:+,$name}${leasetime:+,$leasetime}"
  281. if [ $DNSMASQ_DHCP_VER -eq 6 ]; then
  282. addrs="${ip:+,$ip}${hostid:+,[::$hostid]}"
  283. xappend "--dhcp-host=$macs${duids:+,$duids}$hosttag$addrs$nametime"
  284. else
  285. xappend "--dhcp-host=$macs$hosttag${ip:+,$ip}$nametime"
  286. fi
  287. }
  288. dhcp_this_host_add() {
  289. local net="$1"
  290. local ifname="$2"
  291. local mode="$3"
  292. local routerstub routername ifdashname
  293. local lanaddr lanaddr6 lanaddrs6 ulaprefix
  294. if [ "$mode" -gt 0 ] ; then
  295. ifdashname="${ifname//./-}"
  296. routerstub="$( md5sum /etc/os-release )"
  297. routerstub="router-${routerstub// */}"
  298. routername="$( uci_get system @system[0] hostname $routerstub )"
  299. if [ "$mode" -gt 1 ] ; then
  300. if [ "$mode" -gt 2 ] ; then
  301. if [ "$mode" -gt 3 ] ; then
  302. append_interface_name "$ifdashname.$routername.$DOMAIN" "$ifname"
  303. fi
  304. append_interface_name "$routername.$DOMAIN" "$ifname"
  305. fi
  306. # All IP addresses discovered by dnsmasq will be labeled (except fe80::)
  307. append_interface_name "$routername" "$ifname"
  308. else
  309. # This uses a static host file entry for only limited addresses.
  310. # Use dnsmasq option "--expandhosts" to enable FQDN on host files.
  311. ulaprefix="$(uci_get network @globals[0] ula_prefix)"
  312. network_get_ipaddr lanaddr "$net"
  313. network_get_ipaddrs6 lanaddrs6 "$net"
  314. if [ -n "$lanaddr" ] ; then
  315. dhcp_domain_add "" "$routername" "$lanaddr"
  316. fi
  317. if [ -n "$ulaprefix" -a -n "$lanaddrs6" ] ; then
  318. for lanaddr6 in $lanaddrs6 ; do
  319. case "$lanaddr6" in
  320. "${ulaprefix%%:/*}"*)
  321. dhcp_domain_add "" "$routername" "$lanaddr6"
  322. ;;
  323. esac
  324. done
  325. fi
  326. fi
  327. fi
  328. }
  329. dhcp_tag_add() {
  330. # NOTE: dnsmasq has explicit "option6:" prefix for DHCPv6 so no collisions
  331. local cfg="$1"
  332. tag="$cfg"
  333. [ -n "$tag" ] || return 0
  334. config_get_bool force "$cfg" force 0
  335. [ "$force" = "0" ] && force=
  336. config_get option "$cfg" dhcp_option
  337. for o in $option; do
  338. xappend "--dhcp-option${force:+-force}=tag:$tag,$o"
  339. done
  340. }
  341. dhcp_mac_add() {
  342. local cfg="$1"
  343. config_get networkid "$cfg" networkid
  344. [ -n "$networkid" ] || return 0
  345. config_get mac "$cfg" mac
  346. [ -n "$mac" ] || return 0
  347. xappend "--dhcp-mac=$networkid,$mac"
  348. dhcp_option_add "$cfg" "$networkid"
  349. }
  350. dhcp_boot_add() {
  351. # TODO: BOOTURL is different between DHCPv4 and DHCPv6
  352. local cfg="$1"
  353. config_get networkid "$cfg" networkid
  354. config_get filename "$cfg" filename
  355. [ -n "$filename" ] || return 0
  356. config_get servername "$cfg" servername
  357. config_get serveraddress "$cfg" serveraddress
  358. [ -n "$serveraddress" -a ! -n "$servername" ] && return 0
  359. xappend "--dhcp-boot=${networkid:+net:$networkid,}${filename}${servername:+,$servername}${serveraddress:+,$serveraddress}"
  360. config_get_bool force "$cfg" force 0
  361. dhcp_option_add "$cfg" "$networkid" "$force"
  362. }
  363. dhcp_add() {
  364. local cfg="$1"
  365. local dhcp6range="::"
  366. local nettag
  367. local tags
  368. config_get net "$cfg" interface
  369. [ -n "$net" ] || return 0
  370. config_get networkid "$cfg" networkid
  371. [ -n "$networkid" ] || networkid="$net"
  372. network_get_device ifname "$net" || return 0
  373. [ "$cachelocal" = "0" ] && network_get_dnsserver dnsserver "$net" && {
  374. DNS_SERVERS="$DNS_SERVERS $dnsserver"
  375. }
  376. append_bool "$cfg" ignore "--no-dhcp-interface=$ifname" && {
  377. # Many ISP do not have useful names for DHCP customers (your WAN).
  378. dhcp_this_host_add "$net" "$ifname" "$ADD_WAN_FQDN"
  379. return 0
  380. }
  381. network_get_subnet subnet "$net" || return 0
  382. network_get_protocol proto "$net" || return 0
  383. # Do not support non-static interfaces for now
  384. [ static = "$proto" ] || return 0
  385. # Override interface netmask with dhcp config if applicable
  386. config_get netmask "$cfg" netmask "${subnet##*/}"
  387. #check for an already active dhcp server on the interface, unless 'force' is set
  388. config_get_bool force "$cfg" force 0
  389. [ $force -gt 0 ] || dhcp_check "$ifname" || return 0
  390. config_get start "$cfg" start 100
  391. config_get limit "$cfg" limit 150
  392. config_get leasetime "$cfg" leasetime 12h
  393. config_get options "$cfg" options
  394. config_get_bool dynamicdhcp "$cfg" dynamicdhcp 1
  395. config_get dhcpv4 "$cfg" dhcpv4
  396. config_get dhcpv6 "$cfg" dhcpv6
  397. config_get ra "$cfg" ra
  398. config_get ra_management "$cfg" ra_management
  399. config_get ra_preference "$cfg" ra_preference
  400. config_get dns "$cfg" dns
  401. config_list_foreach "$cfg" "interface_name" append_interface_name "$ifname"
  402. # Put the router host name on this DHCP served interface address(es)
  403. dhcp_this_host_add "$net" "$ifname" "$ADD_LOCAL_FQDN"
  404. start="$( dhcp_calc "$start" )"
  405. add_tag() {
  406. tags="${tags}tag:$1,"
  407. }
  408. config_list_foreach "$cfg" tag add_tag
  409. nettag="${networkid:+set:${networkid},}"
  410. if [ "$limit" -gt 0 ] ; then
  411. limit=$((limit-1))
  412. fi
  413. eval "$(ipcalc.sh "${subnet%%/*}" $netmask $start $limit)"
  414. if [ "$dynamicdhcp" = "0" ] ; then
  415. END="static"
  416. dhcp6range="::,static"
  417. else
  418. dhcp6range="::1000,::ffff"
  419. fi
  420. if [ "$dhcpv4" != "disabled" ] ; then
  421. xappend "--dhcp-range=$tags$nettag$START,$END,$NETMASK,$leasetime${options:+ $options}"
  422. fi
  423. if [ $DNSMASQ_DHCP_VER -eq 6 -a "$ra" = "server" ] ; then
  424. # Note: dnsmasq cannot just be a DHCPv6 server (all-in-1)
  425. # and let some other machine(s) send RA pointing to it.
  426. case $ra_preference in
  427. *high*)
  428. xappend "--ra-param=$ifname,high,0,7200"
  429. ;;
  430. *low*)
  431. xappend "--ra-param=$ifname,low,0,7200"
  432. ;;
  433. *)
  434. # Send UNSOLICITED RA at default interval and live for 2 hours.
  435. # TODO: convert flexible lease time into route life time (only seconds).
  436. xappend "--ra-param=$ifname,0,7200"
  437. ;;
  438. esac
  439. if [ "$dhcpv6" = "disabled" ] ; then
  440. ra_management="3"
  441. fi
  442. case $ra_management in
  443. 0)
  444. # SLACC with DCHP for extended options
  445. xappend "--dhcp-range=$nettag::,constructor:$ifname,ra-stateless,ra-names"
  446. ;;
  447. 2)
  448. # DHCP address and RA only for management redirection
  449. xappend "--dhcp-range=$nettag$dhcp6range,constructor:$ifname,$leasetime"
  450. ;;
  451. 3)
  452. # SLAAC only but dnsmasq attempts to link HOSTNAME, DHCPv4 MAC, and SLAAC
  453. xappend "--dhcp-range=$nettag::,constructor:$ifname,ra-only,ra-names"
  454. ;;
  455. *)
  456. # SLAAC and full DHCP
  457. xappend "--dhcp-range=$nettag$dhcp6range,constructor:$ifname,slaac,ra-names,$leasetime"
  458. ;;
  459. esac
  460. if [ -n "$dns" ]; then
  461. dnss=""
  462. for d in $dns; do append dnss "[$d]" ","; done
  463. else
  464. dnss="[::]"
  465. fi
  466. dhcp_option_append "option6:dns-server,$dnss" "$networkid"
  467. fi
  468. dhcp_option_add "$cfg" "$networkid" 0
  469. dhcp_option_add "$cfg" "$networkid" 2
  470. }
  471. dhcp_option_append() {
  472. local option="$1"
  473. local networkid="$2"
  474. local force="$3"
  475. xappend "--dhcp-option${force:+-force}=${networkid:+$networkid,}$option"
  476. }
  477. dhcp_option_add() {
  478. # NOTE: dnsmasq has explicit "option6:" prefix for DHCPv6 so no collisions
  479. local cfg="$1"
  480. local networkid="$2"
  481. local force="$3"
  482. local opt="dhcp_option"
  483. [ "$force" = "0" ] && force=
  484. [ "$force" = "2" ] && opt="dhcp_option_force"
  485. local list_len
  486. config_get list_len "$cfg" "${opt}_LENGTH"
  487. if [ -n "$list_len" ]; then
  488. config_list_foreach "$cfg" "$opt" dhcp_option_append "$networkid" "$force"
  489. else
  490. config_get dhcp_option "$cfg" "$opt"
  491. [ -n "$dhcp_option" ] && echo "Warning: the 'option $opt' syntax is deprecated, use 'list $opt'" >&2
  492. local option
  493. for option in $dhcp_option; do
  494. dhcp_option_append "$option" "$networkid" "$force"
  495. done
  496. fi
  497. }
  498. dhcp_domain_add() {
  499. local cfg="$1"
  500. local ip name names record
  501. config_get names "$cfg" name "$2"
  502. [ -n "$names" ] || return 0
  503. config_get ip "$cfg" ip "$3"
  504. [ -n "$ip" ] || return 0
  505. for name in $names; do
  506. record="${record:+$record }$name"
  507. done
  508. echo "$ip $record" >> $HOSTFILE_TMP
  509. }
  510. dhcp_srv_add() {
  511. local cfg="$1"
  512. config_get srv "$cfg" srv
  513. [ -n "$srv" ] || return 0
  514. config_get target "$cfg" target
  515. [ -n "$target" ] || return 0
  516. config_get port "$cfg" port
  517. [ -n "$port" ] || return 0
  518. config_get class "$cfg" class
  519. config_get weight "$cfg" weight
  520. local service="$srv,$target,$port${class:+,$class${weight:+,$weight}}"
  521. xappend "--srv-host=$service"
  522. }
  523. dhcp_mx_add() {
  524. local cfg="$1"
  525. local domain relay pref
  526. config_get domain "$cfg" domain
  527. [ -n "$domain" ] || return 0
  528. config_get relay "$cfg" relay
  529. [ -n "$relay" ] || return 0
  530. config_get pref "$cfg" pref 0
  531. local service="$domain,$relay,$pref"
  532. xappend "--mx-host=$service"
  533. }
  534. dhcp_cname_add() {
  535. local cfg="$1"
  536. local cname target
  537. config_get cname "$cfg" cname
  538. [ -n "$cname" ] || return 0
  539. config_get target "$cfg" target
  540. [ -n "$target" ] || return 0
  541. xappend "--cname=${cname},${target}"
  542. }
  543. dhcp_hostrecord_add() {
  544. local cfg="$1"
  545. local names addresses record val
  546. config_get names "$cfg" name "$2"
  547. if [ -z "$names" ]; then
  548. return 0
  549. fi
  550. config_get addresses "$cfg" ip "$3"
  551. if [ -z "$addresses" ]; then
  552. return 0
  553. fi
  554. for val in $names $addresses; do
  555. record="${record:+$record,}$val"
  556. done
  557. xappend "--host-record=$record"
  558. }
  559. dhcp_relay_add() {
  560. local cfg="$1"
  561. local local_addr server_addr interface
  562. config_get local_addr "$cfg" local_addr
  563. [ -n "$local_addr" ] || return 0
  564. config_get server_addr "$cfg" server_addr
  565. [ -n "$server_addr" ] || return 0
  566. config_get interface "$cfg" interface
  567. if [ -z "$interface" ]; then
  568. xappend "--dhcp-relay=$local_addr,$server_addr"
  569. else
  570. network_get_device ifname "$interface" || return
  571. xappend "--dhcp-relay=$local_addr,$server_addr,$ifname"
  572. fi
  573. }
  574. dnsmasq_start()
  575. {
  576. local cfg="$1"
  577. local disabled user_dhcpscript
  578. local resolvfile localuse=0
  579. config_get_bool disabled "$cfg" disabled 0
  580. [ "$disabled" -gt 0 ] && return 0
  581. # reset list of DOMAINS and DNS servers (for each dnsmasq instance)
  582. DNS_SERVERS=""
  583. DOMAIN=""
  584. CONFIGFILE="${BASECONFIGFILE}.${cfg}"
  585. CONFIGFILE_TMP="${CONFIGFILE}.$$"
  586. HOSTFILE="${BASEHOSTFILE}.${cfg}"
  587. HOSTFILE_TMP="${HOSTFILE}.$$"
  588. BASEDHCPSTAMPFILE_CFG="${BASEDHCPSTAMPFILE}.${cfg}"
  589. # before we can call xappend
  590. mkdir -p /var/run/dnsmasq/
  591. mkdir -p $(dirname $CONFIGFILE)
  592. mkdir -p $(dirname $HOSTFILE)
  593. mkdir -p /var/lib/misc
  594. chown dnsmasq:dnsmasq /var/run/dnsmasq
  595. echo "# auto-generated config file from /etc/config/dhcp" > $CONFIGFILE_TMP
  596. echo "# auto-generated config file from /etc/config/dhcp" > $HOSTFILE_TMP
  597. local dnsmasqconffile="/etc/dnsmasq.${cfg}.conf"
  598. if [ ! -r "$dnsmasqconffile" ]; then
  599. dnsmasqconffile=/etc/dnsmasq.conf
  600. fi
  601. # if we did this last, we could override auto-generated config
  602. [ -f "${dnsmasqconffile}" ] && {
  603. xappend "--conf-file=${dnsmasqconffile}"
  604. }
  605. $PROG --version | grep -osqE "^Compile time options:.* DHCPv6( |$)" && DHCPv6CAPABLE=1 || DHCPv6CAPABLE=0
  606. if [ -x /usr/sbin/odhcpd -a -x /etc/init.d/odhcpd ] ; then
  607. local odhcpd_is_main odhcpd_is_enabled
  608. config_get odhcpd_is_main odhcpd maindhcp 0
  609. /etc/init.d/odhcpd enabled && odhcpd_is_enabled=1 || odhcpd_is_enabled=0
  610. if [ "$odhcpd_is_enabled" -eq 0 -a "$DHCPv6CAPABLE" -eq 1 ] ; then
  611. # DHCP V4 and V6 in DNSMASQ
  612. DNSMASQ_DHCP_VER=6
  613. elif [ "$odhcpd_is_main" -gt 0 ] ; then
  614. # ODHCPD is doing it all
  615. DNSMASQ_DHCP_VER=0
  616. else
  617. # You have ODHCPD but use DNSMASQ for DHCPV4
  618. DNSMASQ_DHCP_VER=4
  619. fi
  620. elif [ "$DHCPv6CAPABLE" -eq 1 ] ; then
  621. # DHCP V4 and V6 in DNSMASQ
  622. DNSMASQ_DHCP_VER=6
  623. else
  624. DNSMASQ_DHCP_VER=4
  625. fi
  626. # Allow DHCP/DHCPv6 to be handled by ISC DHCPD
  627. if [ -x /usr/sbin/dhcpd ] ; then
  628. if [ -x /etc/init.d/dhcpd ] ; then
  629. /etc/init.d/dhcpd enabled && DNSMASQ_DHCP_VER=0
  630. fi
  631. if [ -x /etc/init.d/dhcpd6 -a "$DNSMASQ_DHCP_VER" -gt 0 ] ; then
  632. /etc/init.d/dhcpd6 enabled && DNSMASQ_DHCP_VER=4
  633. fi
  634. fi
  635. append_bool "$cfg" authoritative "--dhcp-authoritative"
  636. append_bool "$cfg" nodaemon "--no-daemon"
  637. append_bool "$cfg" domainneeded "--domain-needed"
  638. append_bool "$cfg" filterwin2k "--filterwin2k"
  639. append_bool "$cfg" nohosts "--no-hosts"
  640. append_bool "$cfg" nonegcache "--no-negcache"
  641. append_bool "$cfg" strictorder "--strict-order"
  642. append_bool "$cfg" logqueries "--log-queries=extra"
  643. append_bool "$cfg" noresolv "--no-resolv"
  644. append_bool "$cfg" localise_queries "--localise-queries"
  645. append_bool "$cfg" readethers "--read-ethers"
  646. append_bool "$cfg" dbus "--enable-dbus"
  647. append_bool "$cfg" ubus "--enable-ubus" 1
  648. append_bool "$cfg" expandhosts "--expand-hosts"
  649. config_get tftp_root "$cfg" "tftp_root"
  650. [ -n "$tftp_root" ] && mkdir -p "$tftp_root" && append_bool "$cfg" enable_tftp "--enable-tftp"
  651. append_bool "$cfg" tftp_no_fail "--tftp-no-fail"
  652. append_bool "$cfg" nonwildcard "--bind-dynamic" 1
  653. append_bool "$cfg" fqdn "--dhcp-fqdn"
  654. append_bool "$cfg" proxydnssec "--proxy-dnssec"
  655. append_bool "$cfg" localservice "--local-service"
  656. append_bool "$cfg" logdhcp "--log-dhcp"
  657. append_bool "$cfg" quietdhcp "--quiet-dhcp"
  658. append_bool "$cfg" sequential_ip "--dhcp-sequential-ip"
  659. append_bool "$cfg" allservers "--all-servers"
  660. append_bool "$cfg" noping "--no-ping"
  661. append_bool "$cfg" rapidcommit "--dhcp-rapid-commit"
  662. append_bool "$cfg" scriptarp "--script-arp"
  663. append_parm "$cfg" logfacility "--log-facility"
  664. append_parm "$cfg" cachesize "--cache-size"
  665. append_parm "$cfg" dnsforwardmax "--dns-forward-max"
  666. append_parm "$cfg" port "--port"
  667. append_parm "$cfg" ednspacket_max "--edns-packet-max"
  668. append_parm "$cfg" dhcpleasemax "--dhcp-lease-max"
  669. append_parm "$cfg" "queryport" "--query-port"
  670. append_parm "$cfg" "minport" "--min-port"
  671. append_parm "$cfg" "maxport" "--max-port"
  672. append_parm "$cfg" "domain" "--domain"
  673. append_parm "$cfg" "local" "--server"
  674. config_list_foreach "$cfg" "listen_address" append_listenaddress
  675. config_list_foreach "$cfg" "server" append_server
  676. config_list_foreach "$cfg" "rev_server" append_rev_server
  677. config_list_foreach "$cfg" "address" append_address
  678. config_list_foreach "$cfg" "ipset" append_ipset
  679. [ -n "$BOOT" ] || {
  680. config_list_foreach "$cfg" "interface" append_interface
  681. config_list_foreach "$cfg" "notinterface" append_notinterface
  682. }
  683. config_list_foreach "$cfg" "addnhosts" append_addnhosts
  684. config_list_foreach "$cfg" "bogusnxdomain" append_bogusnxdomain
  685. append_parm "$cfg" "leasefile" "--dhcp-leasefile" "/tmp/dhcp.leases"
  686. append_parm "$cfg" "serversfile" "--servers-file"
  687. append_parm "$cfg" "tftp_root" "--tftp-root"
  688. append_parm "$cfg" "dhcp_boot" "--dhcp-boot"
  689. append_parm "$cfg" "local_ttl" "--local-ttl"
  690. append_parm "$cfg" "max_ttl" "--max-ttl"
  691. append_parm "$cfg" "min_cache_ttl" "--min-cache-ttl"
  692. append_parm "$cfg" "max_cache_ttl" "--max-cache-ttl"
  693. append_parm "$cfg" "pxe_prompt" "--pxe-prompt"
  694. config_list_foreach "$cfg" "pxe_service" append_pxe_service
  695. config_get DOMAIN "$cfg" domain
  696. config_get_bool ADD_LOCAL_DOMAIN "$cfg" add_local_domain 1
  697. config_get_bool ADD_LOCAL_HOSTNAME "$cfg" add_local_hostname 1
  698. config_get ADD_LOCAL_FQDN "$cfg" add_local_fqdn ""
  699. config_get ADD_WAN_FQDN "$cfg" add_wan_fqdn 0
  700. if [ -z "$ADD_LOCAL_FQDN" ] ; then
  701. # maintain support for previous UCI
  702. ADD_LOCAL_FQDN="$ADD_LOCAL_HOSTNAME"
  703. fi
  704. config_get user_dhcpscript $cfg dhcpscript
  705. if has_handler || [ -n "$user_dhcpscript" ]; then
  706. xappend "--dhcp-script=$DHCPSCRIPT"
  707. xappend "--script-arp"
  708. fi
  709. config_get leasefile $cfg leasefile "/tmp/dhcp.leases"
  710. [ -n "$leasefile" -a \! -e "$leasefile" ] && touch "$leasefile"
  711. config_get_bool cachelocal "$cfg" cachelocal 1
  712. config_get_bool noresolv "$cfg" noresolv 0
  713. if [ "$noresolv" != "1" ]; then
  714. config_get resolvfile "$cfg" resolvfile /tmp/resolv.conf.auto
  715. [ -n "$resolvfile" -a ! -e "$resolvfile" ] && touch "$resolvfile"
  716. xappend "--resolv-file=$resolvfile"
  717. [ "$resolvfile" = "/tmp/resolv.conf.auto" ] && localuse=1
  718. fi
  719. config_get_bool localuse "$cfg" localuse "$localuse"
  720. config_get hostsfile "$cfg" dhcphostsfile
  721. [ -e "$hostsfile" ] && xappend "--dhcp-hostsfile=$hostsfile"
  722. local rebind
  723. config_get_bool rebind "$cfg" rebind_protection 1
  724. [ $rebind -gt 0 ] && {
  725. log_once \
  726. "DNS rebinding protection is active," \
  727. "will discard upstream RFC1918 responses!"
  728. xappend "--stop-dns-rebind"
  729. local rebind_localhost
  730. config_get_bool rebind_localhost "$cfg" rebind_localhost 0
  731. [ $rebind_localhost -gt 0 ] && {
  732. log_once "Allowing 127.0.0.0/8 responses"
  733. xappend "--rebind-localhost-ok"
  734. }
  735. append_rebind_domain() {
  736. log_once "Allowing RFC1918 responses for domain $1"
  737. xappend "--rebind-domain-ok=$1"
  738. }
  739. config_list_foreach "$cfg" rebind_domain append_rebind_domain
  740. }
  741. config_get_bool dnssec "$cfg" dnssec 0
  742. [ "$dnssec" -gt 0 ] && {
  743. xappend "--conf-file=$TRUSTANCHORSFILE"
  744. xappend "--dnssec"
  745. [ -x /etc/init.d/sysntpd ] && {
  746. if /etc/init.d/sysntpd enabled || [ "$(uci_get system.ntp.enabled)" = "1" ] ; then
  747. [ -f "$TIMEVALIDFILE" ] || xappend "--dnssec-no-timecheck"
  748. fi
  749. }
  750. append_bool "$cfg" dnsseccheckunsigned "--dnssec-check-unsigned"
  751. }
  752. config_get addmac "$cfg" addmac 0
  753. [ "$addmac" != "0" ] && {
  754. [ "$addmac" = "1" ] && addmac=
  755. xappend "--add-mac${addmac:+="$addmac"}"
  756. }
  757. dhcp_option_add "$cfg" "" 0
  758. dhcp_option_add "$cfg" "" 2
  759. xappend "--dhcp-broadcast=tag:needs-broadcast"
  760. xappend "--addn-hosts=$(dirname $HOSTFILE)"
  761. config_get dnsmasqconfdir "$cfg" confdir "/tmp/dnsmasq.d"
  762. xappend "--conf-dir=$dnsmasqconfdir"
  763. dnsmasqconfdir="${dnsmasqconfdir%%,*}"
  764. [ ! -d "$dnsmasqconfdir" ] && mkdir -p $dnsmasqconfdir
  765. xappend "--user=dnsmasq"
  766. xappend "--group=dnsmasq"
  767. echo >> $CONFIGFILE_TMP
  768. config_get_bool enable_tftp "$cfg" enable_tftp 0
  769. [ "$enable_tftp" -gt 0 ] && {
  770. config_get tftp_root "$cfg" tftp_root
  771. append EXTRA_MOUNT $tftp_root
  772. }
  773. config_foreach filter_dnsmasq host dhcp_host_add "$cfg"
  774. echo >> $CONFIGFILE_TMP
  775. config_get_bool dhcpbogushostname "$cfg" dhcpbogushostname 1
  776. [ "$dhcpbogushostname" -gt 0 ] && {
  777. xappend "--dhcp-ignore-names=tag:dhcp_bogus_hostname"
  778. [ -r "$DHCPBOGUSHOSTNAMEFILE" ] && xappend "--conf-file=$DHCPBOGUSHOSTNAMEFILE"
  779. }
  780. config_foreach filter_dnsmasq boot dhcp_boot_add "$cfg"
  781. config_foreach filter_dnsmasq mac dhcp_mac_add "$cfg"
  782. config_foreach filter_dnsmasq tag dhcp_tag_add "$cfg"
  783. config_foreach filter_dnsmasq vendorclass dhcp_vendorclass_add "$cfg"
  784. config_foreach filter_dnsmasq userclass dhcp_userclass_add "$cfg"
  785. config_foreach filter_dnsmasq circuitid dhcp_circuitid_add "$cfg"
  786. config_foreach filter_dnsmasq remoteid dhcp_remoteid_add "$cfg"
  787. config_foreach filter_dnsmasq subscrid dhcp_subscrid_add "$cfg"
  788. config_foreach filter_dnsmasq match dhcp_match_add "$cfg"
  789. config_foreach filter_dnsmasq domain dhcp_domain_add "$cfg"
  790. config_foreach filter_dnsmasq hostrecord dhcp_hostrecord_add "$cfg"
  791. [ -n "$BOOT" ] || config_foreach filter_dnsmasq relay dhcp_relay_add "$cfg"
  792. echo >> $CONFIGFILE_TMP
  793. config_foreach filter_dnsmasq srvhost dhcp_srv_add "$cfg"
  794. config_foreach filter_dnsmasq mxhost dhcp_mx_add "$cfg"
  795. echo >> $CONFIGFILE_TMP
  796. config_get_bool boguspriv "$cfg" boguspriv 1
  797. [ "$boguspriv" -gt 0 ] && {
  798. xappend "--bogus-priv"
  799. [ -r "$RFC6761FILE" ] && xappend "--conf-file=$RFC6761FILE"
  800. }
  801. if [ "$DNSMASQ_DHCP_VER" -gt 4 ] ; then
  802. # Enable RA feature for when/if it is constructed,
  803. # and RA is selected per interface pool (RA, DHCP, or both),
  804. # but no one (should) want RA broadcast in syslog
  805. [ -n "$BOOT" ] || config_foreach filter_dnsmasq dhcp dhcp_add "$cfg"
  806. xappend "--enable-ra"
  807. xappend "--quiet-ra"
  808. append_bool "$cfg" quietdhcp "--quiet-dhcp6"
  809. elif [ "$DNSMASQ_DHCP_VER" -gt 0 ] ; then
  810. [ -n "$BOOT" ] || config_foreach filter_dnsmasq dhcp dhcp_add "$cfg"
  811. fi
  812. echo >> $CONFIGFILE_TMP
  813. config_foreach filter_dnsmasq cname dhcp_cname_add "$cfg"
  814. echo >> $CONFIGFILE_TMP
  815. echo >> $CONFIGFILE_TMP
  816. mv -f $CONFIGFILE_TMP $CONFIGFILE
  817. mv -f $HOSTFILE_TMP $HOSTFILE
  818. [ "$localuse" -gt 0 ] && {
  819. rm -f /tmp/resolv.conf
  820. [ $ADD_LOCAL_DOMAIN -eq 1 ] && [ -n "$DOMAIN" ] && {
  821. echo "search $DOMAIN" >> /tmp/resolv.conf
  822. }
  823. DNS_SERVERS="$DNS_SERVERS 127.0.0.1"
  824. for DNS_SERVER in $DNS_SERVERS ; do
  825. echo "nameserver $DNS_SERVER" >> /tmp/resolv.conf
  826. done
  827. }
  828. procd_open_instance $cfg
  829. procd_set_param command $PROG -C $CONFIGFILE -k -x /var/run/dnsmasq/dnsmasq."${cfg}".pid
  830. procd_set_param file $CONFIGFILE
  831. [ -n "$user_dhcpscript" ] && procd_set_param env USER_DHCPSCRIPT="$user_dhcpscript"
  832. procd_set_param respawn
  833. procd_add_jail dnsmasq ubus log
  834. procd_add_jail_mount $CONFIGFILE $TRUSTANCHORSFILE $HOSTFILE $RFC6761FILE $DHCPBOGUSHOSTNAMEFILE /etc/passwd /etc/group /etc/TZ /dev/null /dev/urandom $dnsmasqconffile $dnsmasqconfdir $resolvfile $user_dhcpscript /etc/hosts /etc/ethers /sbin/hotplug-call $EXTRA_MOUNT $DHCPSCRIPT
  835. procd_add_jail_mount_rw /var/run/dnsmasq/ $leasefile
  836. procd_close_instance
  837. }
  838. dnsmasq_stop()
  839. {
  840. local cfg="$1"
  841. local noresolv resolvfile localuse=0
  842. config_get_bool noresolv "$cfg" noresolv 0
  843. config_get resolvfile "$cfg" "resolvfile"
  844. [ "$noresolv" = 0 -a "$resolvfile" = "/tmp/resolv.conf.auto" ] && localuse=1
  845. config_get_bool localuse "$cfg" localuse "$localuse"
  846. [ "$localuse" -gt 0 ] && ln -sf "/tmp/resolv.conf.auto" /tmp/resolv.conf
  847. rm -f ${BASEDHCPSTAMPFILE}.${cfg}.*.dhcp
  848. }
  849. add_interface_trigger()
  850. {
  851. local interface ignore
  852. config_get interface "$1" interface
  853. config_get_bool ignore "$1" ignore 0
  854. [ -n "$interface" -a $ignore -eq 0 ] && procd_add_interface_trigger "interface.*" "$interface" /etc/init.d/dnsmasq reload
  855. }
  856. service_triggers()
  857. {
  858. procd_add_reload_trigger "dhcp" "system"
  859. config_load dhcp
  860. config_foreach add_interface_trigger dhcp
  861. config_foreach add_interface_trigger relay
  862. }
  863. boot()
  864. {
  865. BOOT=1
  866. start "$@"
  867. }
  868. start_service() {
  869. local instance="$1"
  870. local instance_found=0
  871. . /lib/functions/network.sh
  872. config_cb() {
  873. local type="$1"
  874. local name="$2"
  875. if [ "$type" = "dnsmasq" ]; then
  876. if [ -n "$instance" -a "$instance" = "$name" ]; then
  877. instance_found=1
  878. fi
  879. fi
  880. }
  881. config_load dhcp
  882. if [ -n "$instance" ]; then
  883. [ "$instance_found" -gt 0 ] || return
  884. dnsmasq_start "$instance"
  885. else
  886. config_foreach dnsmasq_start dnsmasq
  887. fi
  888. }
  889. reload_service() {
  890. rc_procd start_service "$@"
  891. procd_send_signal dnsmasq "$@"
  892. }
  893. stop_service() {
  894. local instance="$1"
  895. local instance_found=0
  896. config_cb() {
  897. local type="$1"
  898. local name="$2"
  899. if [ "$type" = "dnsmasq" ]; then
  900. if [ -n "$instance" -a "$instance" = "$name" ]; then
  901. instance_found=1
  902. fi
  903. fi
  904. }
  905. config_load dhcp
  906. if [ -n "$instance" ]; then
  907. [ "$instance_found" -gt 0 ] || return
  908. dnsmasq_stop "$instance"
  909. else
  910. config_foreach dnsmasq_stop dnsmasq
  911. fi
  912. }