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