package/network/services/dnsmasq/files/dnsmasq.init

   1 #!/bin/sh /etc/rc.common
   2 # Copyright (C) 2007-2012 OpenWrt.org
   3
   4 START=19
   5
   6 USE_PROCD=1
   7 PROG=/usr/sbin/dnsmasq
   8
   9 ADD_LOCAL_DOMAIN=1
  10 ADD_LOCAL_HOSTNAME=1
  11 ADD_WAN_FQDN=0
  12 ADD_LOCAL_FQDN=""
  13 EXTRA_MOUNT=""
  14
  15 BASECONFIGFILE="/var/etc/dnsmasq.conf"
  16 BASEHOSTFILE="/tmp/hosts/dhcp"
  17 TRUSTANCHORSFILE="/usr/share/dnsmasq/trust-anchors.conf"
  18 TIMEVALIDFILE="/var/state/dnsmasqsec"
  19 BASEDHCPSTAMPFILE="/var/run/dnsmasq"
  20 DHCPBOGUSHOSTNAMEFILE="/usr/share/dnsmasq/dhcpbogushostname.conf"
  21 RFC6761FILE="/usr/share/dnsmasq/rfc6761.conf"
  22 DHCPSCRIPT="/usr/lib/dnsmasq/dhcp-script.sh"
  23 DHCPSCRIPT_DEPENDS="/usr/share/libubox/jshn.sh /usr/bin/jshn /bin/ubus"
  24
  25 DNSMASQ_DHCP_VER=4
  26
  27 dnsmasq_ignore_opt() {
  28         local opt="$1"
  29
  30         if [ -z "$dnsmasq_features" ]; then
  31                 dnsmasq_features="$(dnsmasq --version | grep -m1 'Compile time options:' | cut -d: -f2) "
  32                 [ "${dnsmasq_features#* DHCP }" = "$dnsmasq_features" ] || dnsmasq_has_dhcp=1
  33                 [ "${dnsmasq_features#* DHCPv6 }" = "$dnsmasq_features" ] || dnsmasq_has_dhcp6=1
  34                 [ "${dnsmasq_features#* DNSSEC }" = "$dnsmasq_features" ] || dnsmasq_has_dnssec=1
  35                 [ "${dnsmasq_features#* TFTP }" = "$dnsmasq_features" ] || dnsmasq_has_tftp=1
  36                 [ "${dnsmasq_features#* ipset }" = "$dnsmasq_features" ] || dnsmasq_has_ipset=1
  37         fi
  38
  39         case "$opt" in
  40                 dhcp-duid|\
  41                 ra-param)
  42                         [ -z "$dnsmasq_has_dhcp6" ] ;;
  43                 dhcp-*|\
  44                 bootp-*|\
  45                 pxe-*)
  46                         [ -z "$dnsmasq_has_dhcp" ] ;;
  47                 dnssec*|\
  48                 trust-anchor)
  49                         if [ -z "$dnsmasq_has_dnssec" ]; then
  50                                 echo "dnsmasq: \"$opt\" requested, but dnssec support is not available" >&2
  51                                 exit 1
  52                         fi
  53                         return 1
  54                         ;;
  55                 tftp-*)
  56                         [ -z "$dnsmasq_has_tftp" ] ;;
  57                 ipset)
  58                         [ -z "$dnsmasq_has_ipset" ] ;;
  59                 *)
  60                         return 1
  61         esac
  62 }
  63
  64 xappend() {
  65         local value="${1#--}"
  66         local opt="${value%%=*}"
  67
  68         if ! dnsmasq_ignore_opt "$opt"; then
  69                 echo "$value" >>$CONFIGFILE_TMP
  70         fi
  71 }
  72
  73 hex_to_hostid() {
  74         local var="$1"
  75         local hex="${2#0x}" # strip optional "0x" prefix
  76
  77         if [ -n "${hex//[0-9a-fA-F]/}" ]; then
  78                 # is invalid hex literal
  79                 return 1
  80         fi
  81
  82         # convert into host id
  83         export "$var=$(
  84                 printf "%0x:%0x" \
  85                 $(((0x$hex >> 16) % 65536)) \
  86                 $(( 0x$hex        % 65536))
  87                 )"
  88
  89         return 0
  90 }
  91
  92 dhcp_calc() {
  93         local ip="$1"
  94         local res=0
  95
  96         while [ -n "$ip" ]; do
  97                 part="${ip%%.*}"
  98                 res="$(($res * 256))"
  99                 res="$(($res + $part))"
 100                 [ "${ip%.*}" != "$ip" ] && ip="${ip#*.}" || ip=
 101         done
 102         echo "$res"
 103 }
 104
 105 dhcp_check() {
 106         local ifname="$1"
 107         local stamp="${BASEDHCPSTAMPFILE_CFG}.${ifname}.dhcp"
 108         local rv=0
 109
 110         [ -s "$stamp" ] && return $(cat "$stamp")
 111
 112         # If interface is down, skip it.
 113         # The init script will be called again once the link is up
 114         case "$(devstatus "$ifname" | jsonfilter -e @.up)" in
 115                 false) return 1;;
 116         esac
 117
 118         udhcpc -n -q -s /bin/true -t 1 -i "$ifname" >&- && rv=1 || rv=0
 119
 120         echo $rv > "$stamp"
 121         return $rv
 122 }
 123
 124 log_once() {
 125         pidof dnsmasq >/dev/null || \
 126                 logger -t dnsmasq "$@"
 127 }
 128
 129 has_handler() {
 130         local file
 131
 132         for file in /etc/hotplug.d/dhcp/* /etc/hotplug.d/tftp/* /etc/hotplug.d/neigh/*; do
 133                 [ -f "$file" ] && return 0
 134         done
 135
 136         return 1
 137 }
 138
 139 append_bool() {
 140         local section="$1"
 141         local option="$2"
 142         local value="$3"
 143         local default="$4"
 144         local _loctmp
 145         [ -z "$default" ] && default="0"
 146         config_get_bool _loctmp "$section" "$option" "$default"
 147         [ $_loctmp -gt 0 ] && xappend "$value"
 148 }
 149
 150 append_parm() {
 151         local section="$1"
 152         local option="$2"
 153         local switch="$3"
 154         local default="$4"
 155         local _loctmp
 156         config_get _loctmp "$section" "$option" "$default"
 157         [ -z "$_loctmp" ] && return 0
 158         xappend "$switch=$_loctmp"
 159 }
 160
 161 append_server() {
 162         xappend "--server=$1"
 163 }
 164
 165 append_rev_server() {
 166         xappend "--rev-server=$1"
 167 }
 168
 169 append_address() {
 170         xappend "--address=$1"
 171 }
 172
 173 append_ipset() {
 174         xappend "--ipset=$1"
 175 }
 176
 177 append_interface() {
 178         network_get_device ifname "$1" || ifname="$1"
 179         xappend "--interface=$ifname"
 180 }
 181
 182 append_listenaddress() {
 183         xappend "--listen-address=$1"
 184 }
 185
 186 append_notinterface() {
 187         network_get_device ifname "$1" || ifname="$1"
 188         xappend "--except-interface=$ifname"
 189 }
 190
 191 ismounted() {
 192         local filename="$1"
 193         local dirname
 194         for dirname in $EXTRA_MOUNT ; do
 195                 case "$filename" in
 196                         "${dirname}/"* | "${dirname}" )
 197                                 return 1
 198                                 ;;
 199                 esac
 200         done
 201
 202         return 0
 203 }
 204
 205 append_addnhosts() {
 206         ismounted "$1" || append EXTRA_MOUNT "$1"
 207         xappend "--addn-hosts=$1"
 208 }
 209
 210 append_bogusnxdomain() {
 211         xappend "--bogus-nxdomain=$1"
 212 }
 213
 214 append_pxe_service() {
 215         xappend "--pxe-service=$1"
 216 }
 217
 218 append_interface_name() {
 219         xappend "--interface-name=$1,$2"
 220 }
 221
 222 filter_dnsmasq() {
 223         local cfg="$1" func="$2" match_cfg="$3" found_cfg
 224
 225         # use entry when no instance entry set, or if it matches
 226         config_get found_cfg "$cfg" "instance"
 227         if [ -z "$found_cfg" ] || [ "$found_cfg" = "$match_cfg" ]; then
 228                 $func $cfg
 229         fi
 230 }
 231
 232 dhcp_subscrid_add() {
 233         local cfg="$1"
 234
 235         config_get networkid "$cfg" networkid
 236         [ -n "$networkid" ] || return 0
 237
 238         config_get subscriberid "$cfg" subscriberid
 239         [ -n "$subscriberid" ] || return 0
 240
 241         xappend "--dhcp-subscrid=$networkid,$subscriberid"
 242
 243         config_get_bool force "$cfg" force 0
 244
 245         dhcp_option_add "$cfg" "$networkid" "$force"
 246 }
 247
 248 dhcp_remoteid_add() {
 249         local cfg="$1"
 250
 251         config_get networkid "$cfg" networkid
 252         [ -n "$networkid" ] || return 0
 253
 254         config_get remoteid "$cfg" remoteid
 255         [ -n "$remoteid" ] || return 0
 256
 257         xappend "--dhcp-remoteid=$networkid,$remoteid"
 258
 259         config_get_bool force "$cfg" force 0
 260
 261         dhcp_option_add "$cfg" "$networkid" "$force"
 262 }
 263
 264 dhcp_circuitid_add() {
 265         # TODO: DHCPV6 does not have circuitid; catch "option6:"
 266         local cfg="$1"
 267
 268         config_get networkid "$cfg" networkid
 269         [ -n "$networkid" ] || return 0
 270
 271         config_get circuitid "$cfg" circuitid
 272         [ -n "$circuitid" ] || return 0
 273
 274         xappend "--dhcp-circuitid=$networkid,$circuitid"
 275
 276         config_get_bool force "$cfg" force 0
 277
 278         dhcp_option_add "$cfg" "$networkid" "$force"
 279 }
 280
 281 dhcp_userclass_add() {
 282         local cfg="$1"
 283
 284         config_get networkid "$cfg" networkid
 285         [ -n "$networkid" ] || return 0
 286
 287         config_get userclass "$cfg" userclass
 288         [ -n "$userclass" ] || return 0
 289
 290         xappend "--dhcp-userclass=$networkid,$userclass"
 291
 292         config_get_bool force "$cfg" force 0
 293
 294         dhcp_option_add "$cfg" "$networkid" "$force"
 295 }
 296
 297 dhcp_vendorclass_add() {
 298         # TODO: DHCPV6 vendor class has stricter definitions; catch? fixup?
 299         local cfg="$1"
 300
 301         config_get networkid "$cfg" networkid
 302         [ -n "$networkid" ] || return 0
 303
 304         config_get vendorclass "$cfg" vendorclass
 305         [ -n "$vendorclass" ] || return 0
 306
 307         xappend "--dhcp-vendorclass=$networkid,$vendorclass"
 308
 309         config_get_bool force "$cfg" force 0
 310
 311         dhcp_option_add "$cfg" "$networkid" "$force"
 312 }
 313
 314 dhcp_match_add() {
 315         local cfg="$1"
 316
 317         config_get networkid "$cfg" networkid
 318         [ -n "$networkid" ] || return 0
 319
 320         config_get match "$cfg" match
 321         [ -n "$match" ] || return 0
 322
 323         xappend "--dhcp-match=$networkid,$match"
 324
 325         config_get_bool force "$cfg" force 0
 326
 327         dhcp_option_add "$cfg" "$networkid" "$force"
 328 }
 329
 330 dhcp_host_add() {
 331         local cfg="$1"
 332         local hosttag nametime addrs duids macs tags
 333
 334         config_get_bool force "$cfg" force 0
 335
 336         config_get networkid "$cfg" networkid
 337         [ -n "$networkid" ] && dhcp_option_add "$cfg" "$networkid" "$force"
 338
 339         config_get_bool enable "$cfg" enable 1
 340         [ "$enable" = "0" ] && return 0
 341
 342         config_get name "$cfg" name
 343         config_get ip "$cfg" ip
 344         config_get hostid "$cfg" hostid
 345
 346         [ -z "$ip" ] && [ -z "$name" ] && [ -z "$hostid" ] && return 0
 347
 348         config_get_bool dns "$cfg" dns 0
 349         [ "$dns" = "1" ] && [ -n "$ip" ] && [ -n "$name" ] && {
 350                 echo "$ip $name${DOMAIN:+.$DOMAIN}" >> $HOSTFILE_TMP
 351         }
 352
 353         config_get mac "$cfg" mac
 354         config_get duid "$cfg" duid
 355         config_get tag "$cfg" tag
 356
 357         if [ -n "$mac" ]; then
 358                 # --dhcp-host=00:20:e0:3b:13:af,192.168.0.199,lap
 359                 # many MAC are possible to track a laptop ON/OFF dock
 360                 for m in $mac; do append macs "$m" ","; done
 361         fi
 362
 363         if [ $DNSMASQ_DHCP_VER -eq 6 ] && [ -n "$duid" ]; then
 364                 # --dhcp-host=id:00:03:00:01:12:00:00:01:02:03,[::beef],lap
 365                 # one (virtual) machine gets one DUID per RFC3315
 366                 duids="id:${duid// */}"
 367         fi
 368
 369         if [ -z "$macs" ] && [ -z "$duids" ]; then
 370                 # --dhcp-host=lap,192.168.0.199,[::beef]
 371                 [ -n "$name" ] || return 0
 372                 macs="$name"
 373                 name=""
 374         fi
 375
 376         if [ -n "$hostid" ]; then
 377                 hex_to_hostid hostid "$hostid"
 378         fi
 379
 380         if [ -n "$tag" ]; then
 381                 for t in $tag; do append tags "$t" ",set:"; done
 382         fi
 383
 384         config_get_bool broadcast "$cfg" broadcast 0
 385         config_get leasetime "$cfg" leasetime
 386
 387         [ "$broadcast" = "0" ] && broadcast= || broadcast=",set:needs-broadcast"
 388
 389         hosttag="${networkid:+,set:${networkid}}${tags:+,set:${tags}}$broadcast"
 390         nametime="${name:+,$name}${leasetime:+,$leasetime}"
 391
 392         if [ $DNSMASQ_DHCP_VER -eq 6 ]; then
 393                 addrs="${ip:+,$ip}${hostid:+,[::$hostid]}"
 394                 xappend "--dhcp-host=$macs${duids:+,$duids}$hosttag$addrs$nametime"
 395         else
 396                 xappend "--dhcp-host=$macs$hosttag${ip:+,$ip}$nametime"
 397         fi
 398 }
 399
 400 dhcp_this_host_add() {
 401         local net="$1"
 402         local ifname="$2"
 403         local mode="$3"
 404         local routerstub routername ifdashname
 405         local lanaddr lanaddr6 lanaddrs6 ulaprefix
 406
 407         if [ "$mode" -gt 0 ] ; then
 408                 ifdashname="${ifname//./-}"
 409                 routerstub="$( md5sum /etc/os-release )"
 410                 routerstub="router-${routerstub// */}"
 411                 routername="$( uci_get system @system[0] hostname $routerstub )"
 412
 413                 if [ "$mode" -gt 1 ] ; then
 414                         if [ "$mode" -gt 2 ] ; then
 415                                 if [ "$mode" -gt 3 ] ; then
 416                                         append_interface_name "$ifdashname.$routername.$DOMAIN" "$ifname"
 417                                 fi
 418
 419                                 append_interface_name "$routername.$DOMAIN" "$ifname"
 420                         fi
 421
 422                         # All IP addresses discovered by dnsmasq will be labeled (except fe80::)
 423                         append_interface_name "$routername" "$ifname"
 424
 425                 else
 426                         # This uses a static host file entry for only limited addresses.
 427                         # Use dnsmasq option "--expandhosts" to enable FQDN on host files.
 428                         ulaprefix="$(uci_get network @globals[0] ula_prefix)"
 429                         network_get_ipaddr lanaddr "$net"
 430                         network_get_ipaddrs6 lanaddrs6 "$net"
 431
 432                         if [ -n "$lanaddr" ] ; then
 433                                 dhcp_domain_add "" "$routername" "$lanaddr"
 434                         fi
 435
 436                         if [ -n "$ulaprefix" ] && [ -n "$lanaddrs6" ] ; then
 437                                 for lanaddr6 in $lanaddrs6 ; do
 438                                         case "$lanaddr6" in
 439                                         "${ulaprefix%%:/*}"*)
 440                                                 dhcp_domain_add "" "$routername" "$lanaddr6"
 441                                                 ;;
 442                                         esac
 443                                 done
 444                         fi
 445                 fi
 446         fi
 447 }
 448
 449 dhcp_tag_add() {
 450         # NOTE: dnsmasq has explicit "option6:" prefix for DHCPv6 so no collisions
 451         local cfg="$1"
 452
 453         tag="$cfg"
 454
 455         [ -n "$tag" ] || return 0
 456
 457         config_get_bool force "$cfg" force 0
 458         [ "$force" = "0" ] && force=
 459
 460         config_get option "$cfg" dhcp_option
 461         for o in $option; do
 462                 xappend "--dhcp-option${force:+-force}=tag:$tag,$o"
 463         done
 464 }
 465
 466 dhcp_mac_add() {
 467         local cfg="$1"
 468
 469         config_get networkid "$cfg" networkid
 470         [ -n "$networkid" ] || return 0
 471
 472         config_get mac "$cfg" mac
 473         [ -n "$mac" ] || return 0
 474
 475         xappend "--dhcp-mac=$networkid,$mac"
 476
 477         dhcp_option_add "$cfg" "$networkid"
 478 }
 479
 480 dhcp_boot_add() {
 481         # TODO: BOOTURL is different between DHCPv4 and DHCPv6
 482         local cfg="$1"
 483
 484         config_get networkid "$cfg" networkid
 485
 486         config_get filename "$cfg" filename
 487         [ -n "$filename" ] || return 0
 488
 489         config_get servername "$cfg" servername
 490         config_get serveraddress "$cfg" serveraddress
 491
 492         [ -n "$serveraddress" ] && [ ! -n "$servername" ] && return 0
 493
 494         xappend "--dhcp-boot=${networkid:+net:$networkid,}${filename}${servername:+,$servername}${serveraddress:+,$serveraddress}"
 495
 496         config_get_bool force "$cfg" force 0
 497
 498         dhcp_option_add "$cfg" "$networkid" "$force"
 499 }
 500
 501
 502 dhcp_add() {
 503         local cfg="$1"
 504         local dhcp6range="::"
 505         local nettag
 506         local tags
 507
 508         config_get net "$cfg" interface
 509         [ -n "$net" ] || return 0
 510
 511         config_get networkid "$cfg" networkid
 512         [ -n "$networkid" ] || networkid="$net"
 513
 514         network_get_device ifname "$net" || return 0
 515
 516         [ "$cachelocal" = "0" ] && network_get_dnsserver dnsserver "$net" && {
 517                 DNS_SERVERS="$DNS_SERVERS $dnsserver"
 518         }
 519
 520         append_bool "$cfg" ignore "--no-dhcp-interface=$ifname" && {
 521                 # Many ISP do not have useful names for DHCP customers (your WAN).
 522                 dhcp_this_host_add "$net" "$ifname" "$ADD_WAN_FQDN"
 523                 return 0
 524         }
 525
 526         network_get_subnet subnet "$net" || return 0
 527         network_get_protocol proto "$net" || return 0
 528
 529         # Do not support non-static interfaces for now
 530         [ static = "$proto" ] || return 0
 531
 532         # Override interface netmask with dhcp config if applicable
 533         config_get netmask "$cfg" netmask "${subnet##*/}"
 534
 535         #check for an already active dhcp server on the interface, unless 'force' is set
 536         config_get_bool force "$cfg" force 0
 537         [ $force -gt 0 ] || dhcp_check "$ifname" || {
 538                 logger -t dnsmasq \
 539                         "found already running DHCP-server on interface '$ifname'" \
 540                         "refusing to start, use 'option force 1' to override"
 541                 return 0
 542         }
 543
 544         config_get start "$cfg" start 100
 545         config_get limit "$cfg" limit 150
 546         config_get leasetime "$cfg" leasetime 12h
 547         config_get options "$cfg" options
 548         config_get_bool dynamicdhcp "$cfg" dynamicdhcp 1
 549
 550         config_get dhcpv4 "$cfg" dhcpv4
 551         config_get dhcpv6 "$cfg" dhcpv6
 552
 553         config_get ra "$cfg" ra
 554         config_get ra_management "$cfg" ra_management
 555         config_get ra_preference "$cfg" ra_preference
 556         config_get dns "$cfg" dns
 557
 558         config_list_foreach "$cfg" "interface_name" append_interface_name "$ifname"
 559
 560         # Put the router host name on this DHCP served interface address(es)
 561         dhcp_this_host_add "$net" "$ifname" "$ADD_LOCAL_FQDN"
 562
 563         start="$( dhcp_calc "$start" )"
 564
 565         add_tag() {
 566                 tags="${tags}tag:$1,"
 567         }
 568         config_list_foreach "$cfg" tag add_tag
 569
 570         nettag="${networkid:+set:${networkid},}"
 571
 572         if [ "$limit" -gt 0 ] ; then
 573                 limit=$((limit-1))
 574         fi
 575
 576         eval "$(ipcalc.sh "${subnet%%/*}" $netmask $start $limit)"
 577
 578         if [ "$dynamicdhcp" = "0" ] ; then
 579                 END="static"
 580                 dhcp6range="::,static"
 581         else
 582                 dhcp6range="::1000,::ffff"
 583         fi
 584
 585
 586         if [ "$dhcpv4" != "disabled" ] ; then
 587                 xappend "--dhcp-range=$tags$nettag$START,$END,$NETMASK,$leasetime${options:+ $options}"
 588         fi
 589
 590
 591         if [ $DNSMASQ_DHCP_VER -eq 6 ] && [ "$ra" = "server" ] ; then
 592                 # Note: dnsmasq cannot just be a DHCPv6 server (all-in-1)
 593                 # and let some other machine(s) send RA pointing to it.
 594
 595                 case $ra_preference in
 596                 *high*)
 597                         xappend "--ra-param=$ifname,high,0,7200"
 598                         ;;
 599                 *low*)
 600                         xappend "--ra-param=$ifname,low,0,7200"
 601                         ;;
 602                 *)
 603                         # Send UNSOLICITED RA at default interval and live for 2 hours.
 604                         # TODO: convert flexible lease time into route life time (only seconds).
 605                         xappend "--ra-param=$ifname,0,7200"
 606                         ;;
 607                 esac
 608
 609                 if [ "$dhcpv6" = "disabled" ] ; then
 610                         ra_management="3"
 611                 fi
 612
 613
 614                 case $ra_management in
 615                 0)
 616                         # SLACC with DCHP for extended options
 617                         xappend "--dhcp-range=$nettag::,constructor:$ifname,ra-stateless,ra-names"
 618                         ;;
 619                 2)
 620                         # DHCP address and RA only for management redirection
 621                         xappend "--dhcp-range=$nettag$dhcp6range,constructor:$ifname,$leasetime"
 622                         ;;
 623                 3)
 624                         # SLAAC only but dnsmasq attempts to link HOSTNAME, DHCPv4 MAC, and SLAAC
 625                         xappend "--dhcp-range=$nettag::,constructor:$ifname,ra-only,ra-names"
 626                         ;;
 627                 *)
 628                         # SLAAC and full DHCP
 629                         xappend "--dhcp-range=$nettag$dhcp6range,constructor:$ifname,slaac,ra-names,$leasetime"
 630                         ;;
 631                 esac
 632
 633                 if [ -n "$dns" ]; then
 634                         dnss=""
 635                         for d in $dns; do append dnss "[$d]" ","; done
 636                 else
 637                         dnss="[::]"
 638                 fi
 639
 640                 dhcp_option_append "option6:dns-server,$dnss" "$networkid"
 641         fi
 642
 643         dhcp_option_add "$cfg" "$networkid" 0
 644         dhcp_option_add "$cfg" "$networkid" 2
 645 }
 646
 647 dhcp_option_append() {
 648         local option="$1"
 649         local networkid="$2"
 650         local force="$3"
 651
 652         xappend "--dhcp-option${force:+-force}=${networkid:+$networkid,}$option"
 653 }
 654
 655 dhcp_option_add() {
 656         # NOTE: dnsmasq has explicit "option6:" prefix for DHCPv6 so no collisions
 657         local cfg="$1"
 658         local networkid="$2"
 659         local force="$3"
 660         local opt="dhcp_option"
 661
 662         [ "$force" = "0" ] && force=
 663         [ "$force" = "2" ] && opt="dhcp_option_force"
 664
 665         local list_len
 666         config_get list_len "$cfg" "${opt}_LENGTH"
 667
 668         if [ -n "$list_len" ]; then
 669                 config_list_foreach "$cfg" "$opt" dhcp_option_append "$networkid" "$force"
 670         else
 671                 config_get dhcp_option "$cfg" "$opt"
 672
 673                 [ -n "$dhcp_option" ] && echo "Warning: the 'option $opt' syntax is deprecated, use 'list $opt'" >&2
 674
 675                 local option
 676                 for option in $dhcp_option; do
 677                         dhcp_option_append "$option" "$networkid" "$force"
 678                 done
 679         fi
 680 }
 681
 682 dhcp_domain_add() {
 683         local cfg="$1"
 684         local ip name names record
 685
 686         config_get names "$cfg" name "$2"
 687         [ -n "$names" ] || return 0
 688
 689         config_get ip "$cfg" ip "$3"
 690         [ -n "$ip" ] || return 0
 691
 692         for name in $names; do
 693                 record="${record:+$record }$name"
 694         done
 695
 696         echo "$ip $record" >> $HOSTFILE_TMP
 697 }
 698
 699 dhcp_srv_add() {
 700         local cfg="$1"
 701
 702         config_get srv "$cfg" srv
 703         [ -n "$srv" ] || return 0
 704
 705         config_get target "$cfg" target
 706         [ -n "$target" ] || return 0
 707
 708         config_get port "$cfg" port
 709         [ -n "$port" ] || return 0
 710
 711         config_get class "$cfg" class
 712         config_get weight "$cfg" weight
 713
 714         local service="$srv,$target,$port${class:+,$class${weight:+,$weight}}"
 715
 716         xappend "--srv-host=$service"
 717 }
 718
 719 dhcp_mx_add() {
 720         local cfg="$1"
 721         local domain relay pref
 722
 723         config_get domain "$cfg" domain
 724         [ -n "$domain" ] || return 0
 725
 726         config_get relay "$cfg" relay
 727         [ -n "$relay" ] || return 0
 728
 729         config_get pref "$cfg" pref 0
 730
 731         local service="$domain,$relay,$pref"
 732
 733         xappend "--mx-host=$service"
 734 }
 735
 736 dhcp_cname_add() {
 737         local cfg="$1"
 738         local cname target
 739
 740         config_get cname "$cfg" cname
 741         [ -n "$cname" ] || return 0
 742
 743         config_get target "$cfg" target
 744         [ -n "$target" ] || return 0
 745
 746         xappend "--cname=${cname},${target}"
 747 }
 748
 749 dhcp_hostrecord_add() {
 750         local cfg="$1"
 751         local names addresses record val
 752
 753         config_get names "$cfg" name "$2"
 754         if [ -z "$names" ]; then
 755                 return 0
 756         fi
 757
 758         config_get addresses "$cfg" ip "$3"
 759         if [ -z "$addresses" ]; then
 760                 return 0
 761         fi
 762
 763         for val in $names $addresses; do
 764                 record="${record:+$record,}$val"
 765         done
 766
 767         xappend "--host-record=$record"
 768 }
 769
 770 dhcp_relay_add() {
 771         local cfg="$1"
 772         local local_addr server_addr interface
 773
 774         config_get local_addr "$cfg" local_addr
 775         [ -n "$local_addr" ] || return 0
 776
 777         config_get server_addr "$cfg" server_addr
 778         [ -n "$server_addr" ] || return 0
 779
 780         config_get interface "$cfg" interface
 781         if [ -z "$interface" ]; then
 782                 xappend "--dhcp-relay=$local_addr,$server_addr"
 783         else
 784                 network_get_device ifname "$interface" || return
 785                 xappend "--dhcp-relay=$local_addr,$server_addr,$ifname"
 786         fi
 787 }
 788
 789 dnsmasq_ipset_add() {
 790         local cfg="$1"
 791         local ipsets domains
 792
 793         add_ipset() {
 794                 ipsets="${ipsets:+$ipsets,}$1"
 795         }
 796
 797         add_domain() {
 798                 # leading '/' is expected
 799                 domains="$domains/$1"
 800         }
 801
 802         config_list_foreach "$cfg" "name" add_ipset
 803         config_list_foreach "$cfg" "domain" add_domain
 804
 805         if [ -z "$ipsets" ] || [ -z "$domains" ]; then
 806                 return 0
 807         fi
 808
 809         xappend "--ipset=$domains/$ipsets"
 810 }
 811
 812 dnsmasq_start()
 813 {
 814         local cfg="$1"
 815         local disabled user_dhcpscript
 816         local resolvfile resolvdir localuse=0
 817
 818         config_get_bool disabled "$cfg" disabled 0
 819         [ "$disabled" -gt 0 ] && return 0
 820
 821         # reset list of DOMAINS and DNS servers (for each dnsmasq instance)
 822         DNS_SERVERS=""
 823         DOMAIN=""
 824         CONFIGFILE="${BASECONFIGFILE}.${cfg}"
 825         CONFIGFILE_TMP="${CONFIGFILE}.$$"
 826         HOSTFILE="${BASEHOSTFILE}.${cfg}"
 827         HOSTFILE_TMP="${HOSTFILE}.$$"
 828         BASEDHCPSTAMPFILE_CFG="${BASEDHCPSTAMPFILE}.${cfg}"
 829
 830         # before we can call xappend
 831         mkdir -p /var/run/dnsmasq/
 832         mkdir -p $(dirname $CONFIGFILE)
 833         mkdir -p $(dirname $HOSTFILE)
 834         mkdir -p /var/lib/misc
 835         chown dnsmasq:dnsmasq /var/run/dnsmasq
 836
 837         echo "# auto-generated config file from /etc/config/dhcp" > $CONFIGFILE_TMP
 838         echo "# auto-generated config file from /etc/config/dhcp" > $HOSTFILE_TMP
 839
 840         local dnsmasqconffile="/etc/dnsmasq.${cfg}.conf"
 841         if [ ! -r "$dnsmasqconffile" ]; then
 842                 dnsmasqconffile=/etc/dnsmasq.conf
 843         fi
 844
 845         # if we did this last, we could override auto-generated config
 846         [ -f "${dnsmasqconffile}" ] && {
 847                 xappend "--conf-file=${dnsmasqconffile}"
 848         }
 849
 850         $PROG --version | grep -osqE "^Compile time options:.* DHCPv6( |$)" && DHCPv6CAPABLE=1 || DHCPv6CAPABLE=0
 851
 852
 853         if [ -x /usr/sbin/odhcpd ] && [ -x /etc/init.d/odhcpd ] ; then
 854                 local odhcpd_is_main odhcpd_is_enabled
 855                 config_get odhcpd_is_main odhcpd maindhcp 0
 856                 /etc/init.d/odhcpd enabled && odhcpd_is_enabled=1 || odhcpd_is_enabled=0
 857
 858
 859                 if [ "$odhcpd_is_enabled" -eq 0 ] && [ "$DHCPv6CAPABLE" -eq 1 ] ; then
 860                         # DHCP V4 and V6 in DNSMASQ
 861                         DNSMASQ_DHCP_VER=6
 862                 elif [ "$odhcpd_is_main" -gt 0 ] ; then
 863                         # ODHCPD is doing it all
 864                         DNSMASQ_DHCP_VER=0
 865                 else
 866                         # You have ODHCPD but use DNSMASQ for DHCPV4
 867                         DNSMASQ_DHCP_VER=4
 868                 fi
 869
 870         elif [ "$DHCPv6CAPABLE" -eq 1 ] ; then
 871                 # DHCP V4 and V6 in DNSMASQ
 872                 DNSMASQ_DHCP_VER=6
 873         else
 874                 DNSMASQ_DHCP_VER=4
 875         fi
 876
 877         # Allow DHCP/DHCPv6 to be handled by ISC DHCPD
 878         if [ -x /usr/sbin/dhcpd ] ; then
 879                 if [ -x /etc/init.d/dhcpd ] ; then
 880                         /etc/init.d/dhcpd enabled && DNSMASQ_DHCP_VER=0
 881                 fi
 882                 if [ -x /etc/init.d/dhcpd6 ] && [ "$DNSMASQ_DHCP_VER" -gt 0 ] ; then
 883                         /etc/init.d/dhcpd6 enabled && DNSMASQ_DHCP_VER=4
 884                 fi
 885         fi
 886
 887         append_bool "$cfg" authoritative "--dhcp-authoritative"
 888         append_bool "$cfg" nodaemon "--no-daemon"
 889         append_bool "$cfg" domainneeded "--domain-needed"
 890         append_bool "$cfg" filterwin2k "--filterwin2k"
 891         append_bool "$cfg" nohosts "--no-hosts"
 892         append_bool "$cfg" nonegcache "--no-negcache"
 893         append_bool "$cfg" strictorder "--strict-order"
 894         append_bool "$cfg" logqueries "--log-queries=extra"
 895         append_bool "$cfg" noresolv "--no-resolv"
 896         append_bool "$cfg" localise_queries "--localise-queries"
 897         append_bool "$cfg" readethers "--read-ethers"
 898
 899         local instance_name="dnsmasq.$cfg"
 900         if [ "$cfg" = "$DEFAULT_INSTANCE" ]; then
 901                 instance_name="dnsmasq"
 902         fi
 903         config_get_bool dbus "$cfg" "dbus" 0
 904         [ $dbus -gt 0 ] && xappend "--enable-dbus=uk.org.thekelleys.$instance_name"
 905         config_get_bool ubus "$cfg" "ubus" 1
 906         [ $ubus -gt 0 ] && xappend "--enable-ubus=$instance_name"
 907
 908         append_bool "$cfg" expandhosts "--expand-hosts"
 909         config_get tftp_root "$cfg" "tftp_root"
 910         [ -n "$tftp_root" ] && mkdir -p "$tftp_root" && append_bool "$cfg" enable_tftp "--enable-tftp"
 911         append_bool "$cfg" tftp_no_fail "--tftp-no-fail"
 912         append_bool "$cfg" nonwildcard "--bind-dynamic" 1
 913         append_bool "$cfg" fqdn "--dhcp-fqdn"
 914         append_bool "$cfg" proxydnssec "--proxy-dnssec"
 915         append_bool "$cfg" localservice "--local-service"
 916         append_bool "$cfg" logdhcp "--log-dhcp"
 917         append_bool "$cfg" quietdhcp "--quiet-dhcp"
 918         append_bool "$cfg" sequential_ip "--dhcp-sequential-ip"
 919         append_bool "$cfg" allservers "--all-servers"
 920         append_bool "$cfg" noping "--no-ping"
 921         append_bool "$cfg" rapidcommit "--dhcp-rapid-commit"
 922         append_bool "$cfg" scriptarp "--script-arp"
 923
 924         append_parm "$cfg" logfacility "--log-facility"
 925
 926         append_parm "$cfg" cachesize "--cache-size"
 927         append_parm "$cfg" dnsforwardmax "--dns-forward-max"
 928         append_parm "$cfg" port "--port"
 929         append_parm "$cfg" ednspacket_max "--edns-packet-max"
 930         append_parm "$cfg" dhcpleasemax "--dhcp-lease-max"
 931         append_parm "$cfg" "queryport" "--query-port"
 932         append_parm "$cfg" "minport" "--min-port"
 933         append_parm "$cfg" "maxport" "--max-port"
 934         append_parm "$cfg" "domain" "--domain"
 935         append_parm "$cfg" "local" "--local"
 936         config_list_foreach "$cfg" "listen_address" append_listenaddress
 937         config_list_foreach "$cfg" "server" append_server
 938         config_list_foreach "$cfg" "rev_server" append_rev_server
 939         config_list_foreach "$cfg" "address" append_address
 940         config_list_foreach "$cfg" "ipset" append_ipset
 941         [ -n "$BOOT" ] || {
 942                 config_list_foreach "$cfg" "interface" append_interface
 943                 config_list_foreach "$cfg" "notinterface" append_notinterface
 944         }
 945         config_get_bool ignore_hosts_dir "$cfg" ignore_hosts_dir 0
 946         if [ "$ignore_hosts_dir" = "1" ]; then
 947                 xappend "--addn-hosts=$HOSTFILE"
 948                 append EXTRA_MOUNT "$HOSTFILE"
 949         else
 950                 xappend "--addn-hosts=$(dirname $HOSTFILE)"
 951                 append EXTRA_MOUNT "$(dirname $HOSTFILE)"
 952         fi
 953         config_list_foreach "$cfg" "addnhosts" append_addnhosts
 954         config_list_foreach "$cfg" "bogusnxdomain" append_bogusnxdomain
 955         append_parm "$cfg" "leasefile" "--dhcp-leasefile" "/tmp/dhcp.leases"
 956         append_parm "$cfg" "serversfile" "--servers-file"
 957         append_parm "$cfg" "tftp_root" "--tftp-root"
 958         append_parm "$cfg" "dhcp_boot" "--dhcp-boot"
 959         append_parm "$cfg" "local_ttl" "--local-ttl"
 960         append_parm "$cfg" "max_ttl" "--max-ttl"
 961         append_parm "$cfg" "min_cache_ttl" "--min-cache-ttl"
 962         append_parm "$cfg" "max_cache_ttl" "--max-cache-ttl"
 963         append_parm "$cfg" "pxe_prompt" "--pxe-prompt"
 964         append_parm "$cfg" "tftp_unique_root" "--tftp-unique-root"
 965         config_list_foreach "$cfg" "pxe_service" append_pxe_service
 966         config_get DOMAIN "$cfg" domain
 967
 968         config_get_bool ADD_LOCAL_DOMAIN "$cfg" add_local_domain 1
 969         config_get_bool ADD_LOCAL_HOSTNAME "$cfg" add_local_hostname 1
 970         config_get ADD_LOCAL_FQDN "$cfg" add_local_fqdn ""
 971         config_get ADD_WAN_FQDN "$cfg" add_wan_fqdn 0
 972
 973         if [ -z "$ADD_LOCAL_FQDN" ] ; then
 974                 # maintain support for previous UCI
 975                 ADD_LOCAL_FQDN="$ADD_LOCAL_HOSTNAME"
 976         fi
 977
 978         config_get user_dhcpscript $cfg dhcpscript
 979         if has_handler || [ -n "$user_dhcpscript" ]; then
 980                 xappend "--dhcp-script=$DHCPSCRIPT"
 981                 xappend "--script-arp"
 982         fi
 983
 984         config_get leasefile $cfg leasefile "/tmp/dhcp.leases"
 985         [ -n "$leasefile" ] && [ ! -e "$leasefile" ] && touch "$leasefile"
 986         config_get_bool cachelocal "$cfg" cachelocal 1
 987
 988         config_get_bool noresolv "$cfg" noresolv 0
 989         if [ "$noresolv" != "1" ]; then
 990                 config_get resolvfile "$cfg" resolvfile /tmp/resolv.conf.d/resolv.conf.auto
 991                 [ -n "$resolvfile" ] && [ ! -e "$resolvfile" ] && touch "$resolvfile"
 992                 xappend "--resolv-file=$resolvfile"
 993                 [ "$resolvfile" = "/tmp/resolv.conf.d/resolv.conf.auto" ] && localuse=1
 994                 resolvdir="$(dirname "$resolvfile")"
 995         fi
 996         config_get_bool localuse "$cfg" localuse "$localuse"
 997
 998         config_get hostsfile "$cfg" dhcphostsfile
 999         [ -e "$hostsfile" ] && xappend "--dhcp-hostsfile=$hostsfile"
1000
1001         local rebind
1002         config_get_bool rebind "$cfg" rebind_protection 1
1003         [ $rebind -gt 0 ] && {
1004                 log_once \
1005                         "DNS rebinding protection is active," \
1006                         "will discard upstream RFC1918 responses!"
1007                 xappend "--stop-dns-rebind"
1008
1009                 local rebind_localhost
1010                 config_get_bool rebind_localhost "$cfg" rebind_localhost 0
1011                 [ $rebind_localhost -gt 0 ] && {
1012                         log_once "Allowing 127.0.0.0/8 responses"
1013                         xappend "--rebind-localhost-ok"
1014                 }
1015
1016                 append_rebind_domain() {
1017                         log_once "Allowing RFC1918 responses for domain $1"
1018                         xappend "--rebind-domain-ok=$1"
1019                 }
1020
1021                 config_list_foreach "$cfg" rebind_domain append_rebind_domain
1022         }
1023
1024         config_get_bool dnssec "$cfg" dnssec 0
1025         [ "$dnssec" -gt 0 ] && {
1026                 xappend "--conf-file=$TRUSTANCHORSFILE"
1027                 xappend "--dnssec"
1028                 [ -x /etc/init.d/sysntpd ] && {
1029                         if /etc/init.d/sysntpd enabled || [ "$(uci_get system.ntp.enabled)" = "1" ] ; then
1030                                 [ -f "$TIMEVALIDFILE" ] || xappend "--dnssec-no-timecheck"
1031                         fi
1032                 }
1033                 config_get_bool dnsseccheckunsigned "$cfg" dnsseccheckunsigned 1
1034                 [ "$dnsseccheckunsigned" -eq 0 ] && xappend "--dnssec-check-unsigned=no"
1035         }
1036
1037         config_get addmac "$cfg" addmac 0
1038         [ "$addmac" != "0" ] && {
1039                 [ "$addmac" = "1" ] && addmac=
1040                 xappend "--add-mac${addmac:+="$addmac"}"
1041         }
1042
1043         dhcp_option_add "$cfg" "" 0
1044         dhcp_option_add "$cfg" "" 2
1045
1046         xappend "--dhcp-broadcast=tag:needs-broadcast"
1047
1048
1049         config_get dnsmasqconfdir "$cfg" confdir "/tmp/dnsmasq.d"
1050         xappend "--conf-dir=$dnsmasqconfdir"
1051         dnsmasqconfdir="${dnsmasqconfdir%%,*}"
1052         [ ! -d "$dnsmasqconfdir" ] && mkdir -p $dnsmasqconfdir
1053         xappend "--user=dnsmasq"
1054         xappend "--group=dnsmasq"
1055         echo >> $CONFIGFILE_TMP
1056
1057         config_get_bool enable_tftp "$cfg" enable_tftp 0
1058         [ "$enable_tftp" -gt 0 ] && {
1059                 config_get tftp_root "$cfg" tftp_root
1060                 append EXTRA_MOUNT $tftp_root
1061         }
1062
1063         config_foreach filter_dnsmasq host dhcp_host_add "$cfg"
1064         echo >> $CONFIGFILE_TMP
1065
1066         config_get_bool dhcpbogushostname "$cfg" dhcpbogushostname 1
1067         [ "$dhcpbogushostname" -gt 0 ] && {
1068                 xappend "--dhcp-ignore-names=tag:dhcp_bogus_hostname"
1069                 [ -r "$DHCPBOGUSHOSTNAMEFILE" ] && xappend "--conf-file=$DHCPBOGUSHOSTNAMEFILE"
1070         }
1071
1072         config_foreach filter_dnsmasq boot dhcp_boot_add "$cfg"
1073         config_foreach filter_dnsmasq mac dhcp_mac_add "$cfg"
1074         config_foreach filter_dnsmasq tag dhcp_tag_add "$cfg"
1075         config_foreach filter_dnsmasq vendorclass dhcp_vendorclass_add "$cfg"
1076         config_foreach filter_dnsmasq userclass dhcp_userclass_add "$cfg"
1077         config_foreach filter_dnsmasq circuitid dhcp_circuitid_add "$cfg"
1078         config_foreach filter_dnsmasq remoteid dhcp_remoteid_add "$cfg"
1079         config_foreach filter_dnsmasq subscrid dhcp_subscrid_add "$cfg"
1080         config_foreach filter_dnsmasq match dhcp_match_add "$cfg"
1081         config_foreach filter_dnsmasq domain dhcp_domain_add "$cfg"
1082         config_foreach filter_dnsmasq hostrecord dhcp_hostrecord_add "$cfg"
1083         [ -n "$BOOT" ] || config_foreach filter_dnsmasq relay dhcp_relay_add "$cfg"
1084
1085         echo >> $CONFIGFILE_TMP
1086         config_foreach filter_dnsmasq srvhost dhcp_srv_add "$cfg"
1087         config_foreach filter_dnsmasq mxhost dhcp_mx_add "$cfg"
1088         echo >> $CONFIGFILE_TMP
1089
1090         config_get_bool boguspriv "$cfg" boguspriv 1
1091         [ "$boguspriv" -gt 0 ] && {
1092                 xappend "--bogus-priv"
1093                 [ -r "$RFC6761FILE" ] && xappend "--conf-file=$RFC6761FILE"
1094         }
1095
1096         if [ "$DNSMASQ_DHCP_VER" -gt 4 ] ; then
1097                 # Enable RA feature for when/if it is constructed,
1098                 # and RA is selected per interface pool (RA, DHCP, or both),
1099                 # but no one (should) want RA broadcast in syslog
1100                 [ -n "$BOOT" ] || config_foreach filter_dnsmasq dhcp dhcp_add "$cfg"
1101                 xappend "--enable-ra"
1102                 xappend "--quiet-ra"
1103                 append_bool "$cfg" quietdhcp "--quiet-dhcp6"
1104
1105         elif [ "$DNSMASQ_DHCP_VER" -gt 0 ] ; then
1106                 [ -n "$BOOT" ] || config_foreach filter_dnsmasq dhcp dhcp_add "$cfg"
1107         fi
1108
1109
1110         echo >> $CONFIGFILE_TMP
1111         config_foreach filter_dnsmasq cname dhcp_cname_add "$cfg"
1112         echo >> $CONFIGFILE_TMP
1113
1114         echo >> $CONFIGFILE_TMP
1115         config_foreach filter_dnsmasq ipset dnsmasq_ipset_add "$cfg"
1116         echo >> $CONFIGFILE_TMP
1117
1118         echo >> $CONFIGFILE_TMP
1119         mv -f $CONFIGFILE_TMP $CONFIGFILE
1120         mv -f $HOSTFILE_TMP $HOSTFILE
1121
1122         [ "$localuse" -gt 0 ] && {
1123                 rm -f /tmp/resolv.conf
1124                 [ $ADD_LOCAL_DOMAIN -eq 1 ] && [ -n "$DOMAIN" ] && {
1125                         echo "search $DOMAIN" >> /tmp/resolv.conf
1126                 }
1127                 DNS_SERVERS="$DNS_SERVERS 127.0.0.1"
1128                 [ -e /proc/sys/net/ipv6 ] && DNS_SERVERS="$DNS_SERVERS ::1"
1129                 for DNS_SERVER in $DNS_SERVERS ; do
1130                         echo "nameserver $DNS_SERVER" >> /tmp/resolv.conf
1131                 done
1132         }
1133
1134         procd_open_instance $cfg
1135         procd_set_param command $PROG -C $CONFIGFILE -k -x /var/run/dnsmasq/dnsmasq."${cfg}".pid
1136         procd_set_param file $CONFIGFILE
1137         [ -n "$user_dhcpscript" ] && procd_set_param env USER_DHCPSCRIPT="$user_dhcpscript"
1138         procd_set_param respawn
1139
1140         procd_add_jail dnsmasq ubus log
1141         procd_add_jail_mount $CONFIGFILE $DHCPBOGUSHOSTNAMEFILE $DHCPSCRIPT $DHCPSCRIPT_DEPENDS
1142         procd_add_jail_mount $EXTRA_MOUNT $RFC6761FILE $TRUSTANCHORSFILE
1143         procd_add_jail_mount $dnsmasqconffile $dnsmasqconfdir $resolvdir $user_dhcpscript
1144         procd_add_jail_mount /etc/passwd /etc/group /etc/TZ /etc/hosts /etc/ethers
1145         procd_add_jail_mount_rw /var/run/dnsmasq/ $leasefile
1146
1147         procd_close_instance
1148 }
1149
1150 dnsmasq_stop()
1151 {
1152         local cfg="$1"
1153         local noresolv resolvfile localuse=0
1154
1155         config_get_bool noresolv "$cfg" noresolv 0
1156         config_get resolvfile "$cfg" "resolvfile"
1157
1158         [ "$noresolv" = 0 ] && [ "$resolvfile" = "/tmp/resolv.conf.d/resolv.conf.auto" ] && localuse=1
1159         config_get_bool localuse "$cfg" localuse "$localuse"
1160         [ "$localuse" -gt 0 ] && ln -sf "/tmp/resolv.conf.d/resolv.conf.auto" /tmp/resolv.conf
1161
1162         rm -f ${BASEDHCPSTAMPFILE}.${cfg}.*.dhcp
1163 }
1164
1165 add_interface_trigger()
1166 {
1167         local interface ignore
1168
1169         config_get interface "$1" interface
1170         config_get_bool ignore "$1" ignore 0
1171
1172         [ -n "$interface" ] && [ $ignore -eq 0 ] && procd_add_interface_trigger "interface.*" "$interface" /etc/init.d/dnsmasq reload
1173 }
1174
1175 service_triggers()
1176 {
1177         procd_add_reload_trigger "dhcp" "system"
1178
1179         config_load dhcp
1180         config_foreach add_interface_trigger dhcp
1181         config_foreach add_interface_trigger relay
1182 }
1183
1184 boot()
1185 {
1186         BOOT=1
1187         start "$@"
1188 }
1189
1190 start_service() {
1191         local instance="$1"
1192         local instance_found=0
1193         local first_instance=""
1194
1195         . /lib/functions/network.sh
1196
1197         config_cb() {
1198                 local type="$1"
1199                 local name="$2"
1200                 if [ "$type" = "dnsmasq" ]; then
1201                         if [ -n "$instance" ] && [ "$instance" = "$name" ]; then
1202                                 instance_found=1
1203                         fi
1204                         if [ -z "$DEFAULT_INSTANCE" ]; then
1205                                 local disabled
1206                                 config_get_bool disabled "$name" disabled 0
1207                                 if [ "$disabled" -eq 0 ]; then
1208                                         # First enabled section will be assigned default instance name.
1209                                         # Unnamed sections get precedence over named sections.
1210                                         if expr "$cfg" : 'cfg[0-9a-f]*$' >/dev/null = "9"; then # See uci_fixup_section.
1211                                                 DEFAULT_INSTANCE="$name" # Unnamed config section.
1212                                         elif [ -z "$first_instance" ]; then
1213                                                 first_instance="$name"
1214                                         fi
1215                                 fi
1216                         fi
1217                 fi
1218         }
1219
1220         DEFAULT_INSTANCE=""
1221         config_load dhcp
1222         if [ -z "$DEFAULT_INSTANCE" ]; then
1223                 DEFAULT_INSTANCE="$first_instance" # No unnamed config section was found.
1224         fi
1225
1226         if [ -n "$instance" ]; then
1227                 [ "$instance_found" -gt 0 ] || return
1228                 dnsmasq_start "$instance"
1229         else
1230                 config_foreach dnsmasq_start dnsmasq
1231         fi
1232 }
1233
1234 reload_service() {
1235         rc_procd start_service "$@"
1236         procd_send_signal dnsmasq "$@"
1237 }
1238
1239 stop_service() {
1240         local instance="$1"
1241         local instance_found=0
1242
1243         config_cb() {
1244                 local type="$1"
1245                 local name="$2"
1246                 if [ "$type" = "dnsmasq" ]; then
1247                         if [ -n "$instance" ] && [ "$instance" = "$name" ]; then
1248                                 instance_found=1
1249                         fi
1250                 fi
1251         }
1252
1253         config_load dhcp
1254
1255         if [ -n "$instance" ]; then
1256                 [ "$instance_found" -gt 0 ] || return
1257                 dnsmasq_stop "$instance"
1258         else
1259                 config_foreach dnsmasq_stop dnsmasq
1260         fi
1261 }