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 DHCPSCRIPT_DEPENDS="/usr/share/libubox/jshn.sh /usr/bin/jshn /bin/ubus"
  23
  24 DNSMASQ_DHCP_VER=4
  25
  26 dnsmasq_ignore_opt() {
  27         local opt="$1"
  28
  29         if [ -z "$dnsmasq_features" ]; then
  30                 dnsmasq_features="$(dnsmasq --version | grep -m1 'Compile time options:' | cut -d: -f2) "
  31                 [ "${dnsmasq_features#* DHCP }" = "$dnsmasq_features" ] || dnsmasq_has_dhcp=1
  32                 [ "${dnsmasq_features#* DHCPv6 }" = "$dnsmasq_features" ] || dnsmasq_has_dhcp6=1
  33                 [ "${dnsmasq_features#* DNSSEC }" = "$dnsmasq_features" ] || dnsmasq_has_dnssec=1
  34                 [ "${dnsmasq_features#* TFTP }" = "$dnsmasq_features" ] || dnsmasq_has_tftp=1
  35                 [ "${dnsmasq_features#* ipset }" = "$dnsmasq_features" ] || dnsmasq_has_ipset=1
  36         fi
  37
  38         case "$opt" in
  39                 dhcp-duid|\
  40                 ra-param)
  41                         [ -z "$dnsmasq_has_dhcp6" ] ;;
  42                 dhcp-*|\
  43                 bootp-*|\
  44                 pxe-*)
  45                         [ -z "$dnsmasq_has_dhcp" ] ;;
  46                 dnssec*|\
  47                 trust-anchor)
  48                         if [ -z "$dnsmasq_has_dnssec" ]; then
  49                                 echo "dnsmasq: \"$opt\" requested, but dnssec support is not available" >&2
  50                                 exit 1
  51                         fi
  52                         return 1
  53                         ;;
  54                 tftp-*)
  55                         [ -z "$dnsmasq_has_tftp" ] ;;
  56                 ipset)
  57                         [ -z "$dnsmasq_has_ipset" ] ;;
  58                 *)
  59                         return 1
  60         esac
  61 }
  62
  63 xappend() {
  64         local value="${1#--}"
  65         local opt="${value%%=*}"
  66
  67         if ! dnsmasq_ignore_opt "$opt"; then
  68                 echo "$value" >>$CONFIGFILE_TMP
  69         fi
  70 }
  71
  72 hex_to_hostid() {
  73         local var="$1"
  74         local hex="${2#0x}" # strip optional "0x" prefix
  75
  76         if [ -n "${hex//[0-9a-fA-F]/}" ]; then
  77                 # is invalid hex literal
  78                 return 1
  79         fi
  80
  81         # convert into host id
  82         export "$var=$(
  83                 printf "%0x:%0x" \
  84                 $(((0x$hex >> 16) % 65536)) \
  85                 $(( 0x$hex        % 65536))
  86                 )"
  87
  88         return 0
  89 }
  90
  91 dhcp_calc() {
  92         local ip="$1"
  93         local res=0
  94
  95         while [ -n "$ip" ]; do
  96                 part="${ip%%.*}"
  97                 res="$(($res * 256))"
  98                 res="$(($res + $part))"
  99                 [ "${ip%.*}" != "$ip" ] && ip="${ip#*.}" || ip=
 100         done
 101         echo "$res"
 102 }
 103
 104 dhcp_check() {
 105         local ifname="$1"
 106         local stamp="${BASEDHCPSTAMPFILE_CFG}.${ifname}.dhcp"
 107         local rv=0
 108
 109         [ -s "$stamp" ] && return $(cat "$stamp")
 110
 111         # If interface is down, skip it.
 112         # The init script will be called again once the link is up
 113         case "$(devstatus "$ifname" | jsonfilter -e @.up)" in
 114                 false) return 1;;
 115         esac
 116
 117         udhcpc -n -q -s /bin/true -t 1 -i "$ifname" >&- && rv=1 || rv=0
 118
 119         echo $rv > "$stamp"
 120         return $rv
 121 }
 122
 123 log_once() {
 124         pidof dnsmasq >/dev/null || \
 125                 logger -t dnsmasq "$@"
 126 }
 127
 128 has_handler() {
 129         local file
 130
 131         for file in /etc/hotplug.d/dhcp/* /etc/hotplug.d/tftp/* /etc/hotplug.d/neigh/*; do
 132                 [ -f "$file" ] && return 0
 133         done
 134
 135         return 1
 136 }
 137
 138 append_bool() {
 139         local section="$1"
 140         local option="$2"
 141         local value="$3"
 142         local default="$4"
 143         local _loctmp
 144         [ -z "$default" ] && default="0"
 145         config_get_bool _loctmp "$section" "$option" "$default"
 146         [ $_loctmp -gt 0 ] && xappend "$value"
 147 }
 148
 149 append_parm() {
 150         local section="$1"
 151         local option="$2"
 152         local switch="$3"
 153         local default="$4"
 154         local _loctmp
 155         config_get _loctmp "$section" "$option" "$default"
 156         [ -z "$_loctmp" ] && return 0
 157         xappend "$switch=$_loctmp"
 158 }
 159
 160 append_server() {
 161         xappend "--server=$1"
 162 }
 163
 164 append_rev_server() {
 165         xappend "--rev-server=$1"
 166 }
 167
 168 append_address() {
 169         xappend "--address=$1"
 170 }
 171
 172 append_ipset() {
 173         xappend "--ipset=$1"
 174 }
 175
 176 append_interface() {
 177         network_get_device ifname "$1" || ifname="$1"
 178         xappend "--interface=$ifname"
 179 }
 180
 181 append_listenaddress() {
 182         xappend "--listen-address=$1"
 183 }
 184
 185 append_notinterface() {
 186         network_get_device ifname "$1" || ifname="$1"
 187         xappend "--except-interface=$ifname"
 188 }
 189
 190 ismounted() {
 191         local filename="$1"
 192         local dirname
 193         for dirname in $EXTRA_MOUNT ; do
 194                 case "$filename" in
 195                         "${dirname}/"* | "${dirname}" )
 196                                 return 1
 197                                 ;;
 198                 esac
 199         done
 200
 201         return 0
 202 }
 203
 204 append_addnhosts() {
 205         ismounted "$1" || append EXTRA_MOUNT "$1"
 206         xappend "--addn-hosts=$1"
 207 }
 208
 209 append_bogusnxdomain() {
 210         xappend "--bogus-nxdomain=$1"
 211 }
 212
 213 append_pxe_service() {
 214         xappend "--pxe-service=$1"
 215 }
 216
 217 append_interface_name() {
 218         xappend "--interface-name=$1,$2"
 219 }
 220
 221 filter_dnsmasq() {
 222         local cfg="$1" func="$2" match_cfg="$3" found_cfg
 223
 224         # use entry when no instance entry set, or if it matches
 225         config_get found_cfg "$cfg" "instance"
 226         if [ -z "$found_cfg" ] || [ "$found_cfg" = "$match_cfg" ]; then
 227                 $func $cfg
 228         fi
 229 }
 230
 231 dhcp_subscrid_add() {
 232         local cfg="$1"
 233
 234         config_get networkid "$cfg" networkid
 235         [ -n "$networkid" ] || return 0
 236
 237         config_get subscriberid "$cfg" subscriberid
 238         [ -n "$subscriberid" ] || return 0
 239
 240         xappend "--dhcp-subscrid=$networkid,$subscriberid"
 241
 242         config_get_bool force "$cfg" force 0
 243
 244         dhcp_option_add "$cfg" "$networkid" "$force"
 245 }
 246
 247 dhcp_remoteid_add() {
 248         local cfg="$1"
 249
 250         config_get networkid "$cfg" networkid
 251         [ -n "$networkid" ] || return 0
 252
 253         config_get remoteid "$cfg" remoteid
 254         [ -n "$remoteid" ] || return 0
 255
 256         xappend "--dhcp-remoteid=$networkid,$remoteid"
 257
 258         config_get_bool force "$cfg" force 0
 259
 260         dhcp_option_add "$cfg" "$networkid" "$force"
 261 }
 262
 263 dhcp_circuitid_add() {
 264         # TODO: DHCPV6 does not have circuitid; catch "option6:"
 265         local cfg="$1"
 266
 267         config_get networkid "$cfg" networkid
 268         [ -n "$networkid" ] || return 0
 269
 270         config_get circuitid "$cfg" circuitid
 271         [ -n "$circuitid" ] || return 0
 272
 273         xappend "--dhcp-circuitid=$networkid,$circuitid"
 274
 275         config_get_bool force "$cfg" force 0
 276
 277         dhcp_option_add "$cfg" "$networkid" "$force"
 278 }
 279
 280 dhcp_userclass_add() {
 281         local cfg="$1"
 282
 283         config_get networkid "$cfg" networkid
 284         [ -n "$networkid" ] || return 0
 285
 286         config_get userclass "$cfg" userclass
 287         [ -n "$userclass" ] || return 0
 288
 289         xappend "--dhcp-userclass=$networkid,$userclass"
 290
 291         config_get_bool force "$cfg" force 0
 292
 293         dhcp_option_add "$cfg" "$networkid" "$force"
 294 }
 295
 296 dhcp_vendorclass_add() {
 297         # TODO: DHCPV6 vendor class has stricter definitions; catch? fixup?
 298         local cfg="$1"
 299
 300         config_get networkid "$cfg" networkid
 301         [ -n "$networkid" ] || return 0
 302
 303         config_get vendorclass "$cfg" vendorclass
 304         [ -n "$vendorclass" ] || return 0
 305
 306         xappend "--dhcp-vendorclass=$networkid,$vendorclass"
 307
 308         config_get_bool force "$cfg" force 0
 309
 310         dhcp_option_add "$cfg" "$networkid" "$force"
 311 }
 312
 313 dhcp_match_add() {
 314         local cfg="$1"
 315
 316         config_get networkid "$cfg" networkid
 317         [ -n "$networkid" ] || return 0
 318
 319         config_get match "$cfg" match
 320         [ -n "$match" ] || return 0
 321
 322         xappend "--dhcp-match=$networkid,$match"
 323
 324         config_get_bool force "$cfg" force 0
 325
 326         dhcp_option_add "$cfg" "$networkid" "$force"
 327 }
 328
 329 dhcp_host_add() {
 330         local cfg="$1"
 331         local hosttag nametime addrs duids macs tags
 332
 333         config_get_bool force "$cfg" force 0
 334
 335         config_get networkid "$cfg" networkid
 336         [ -n "$networkid" ] && dhcp_option_add "$cfg" "$networkid" "$force"
 337
 338         config_get_bool enable "$cfg" enable 1
 339         [ "$enable" = "0" ] && return 0
 340
 341         config_get name "$cfg" name
 342         config_get ip "$cfg" ip
 343         config_get hostid "$cfg" hostid
 344
 345         [ -z "$ip" ] && [ -z "$name" ] && [ -z "$hostid" ] && return 0
 346
 347         config_get_bool dns "$cfg" dns 0
 348         [ "$dns" = "1" ] && [ -n "$ip" ] && [ -n "$name" ] && {
 349                 echo "$ip $name${DOMAIN:+.$DOMAIN}" >> $HOSTFILE_TMP
 350         }
 351
 352         config_get mac "$cfg" mac
 353         config_get duid "$cfg" duid
 354         config_get tag "$cfg" tag
 355
 356         if [ -n "$mac" ]; then
 357                 # --dhcp-host=00:20:e0:3b:13:af,192.168.0.199,lap
 358                 # many MAC are possible to track a laptop ON/OFF dock
 359                 for m in $mac; do append macs "$m" ","; done
 360         fi
 361
 362         if [ $DNSMASQ_DHCP_VER -eq 6 ] && [ -n "$duid" ]; then
 363                 # --dhcp-host=id:00:03:00:01:12:00:00:01:02:03,[::beef],lap
 364                 # one (virtual) machine gets one DUID per RFC3315
 365                 duids="id:${duid// */}"
 366         fi
 367
 368         if [ -z "$macs" ] && [ -z "$duids" ]; then
 369                 # --dhcp-host=lap,192.168.0.199,[::beef]
 370                 [ -n "$name" ] || return 0
 371                 macs="$name"
 372                 name=""
 373         fi
 374
 375         if [ -n "$hostid" ]; then
 376                 hex_to_hostid hostid "$hostid"
 377         fi
 378
 379         if [ -n "$tag" ]; then
 380                 for t in $tag; do append tags "$t" ",set:"; done
 381         fi
 382
 383         config_get_bool broadcast "$cfg" broadcast 0
 384         config_get leasetime "$cfg" leasetime
 385
 386         [ "$broadcast" = "0" ] && broadcast= || broadcast=",set:needs-broadcast"
 387
 388         hosttag="${networkid:+,set:${networkid}}${tags:+,set:${tags}}$broadcast"
 389         nametime="${name:+,$name}${leasetime:+,$leasetime}"
 390
 391         if [ $DNSMASQ_DHCP_VER -eq 6 ]; then
 392                 addrs="${ip:+,$ip}${hostid:+,[::$hostid]}"
 393                 xappend "--dhcp-host=$macs${duids:+,$duids}$hosttag$addrs$nametime"
 394         else
 395                 xappend "--dhcp-host=$macs$hosttag${ip:+,$ip}$nametime"
 396         fi
 397 }
 398
 399 dhcp_this_host_add() {
 400         local net="$1"
 401         local ifname="$2"
 402         local mode="$3"
 403         local routerstub routername ifdashname
 404         local lanaddr lanaddr6 lanaddrs6 ulaprefix
 405
 406         if [ "$mode" -gt 0 ] ; then
 407                 ifdashname="${ifname//./-}"
 408                 routerstub="$( md5sum /etc/os-release )"
 409                 routerstub="router-${routerstub// */}"
 410                 routername="$( uci_get system @system[0] hostname $routerstub )"
 411
 412                 if [ "$mode" -gt 1 ] ; then
 413                         if [ "$mode" -gt 2 ] ; then
 414                                 if [ "$mode" -gt 3 ] ; then
 415                                         append_interface_name "$ifdashname.$routername.$DOMAIN" "$ifname"
 416                                 fi
 417
 418                                 append_interface_name "$routername.$DOMAIN" "$ifname"
 419                         fi
 420
 421                         # All IP addresses discovered by dnsmasq will be labeled (except fe80::)
 422                         append_interface_name "$routername" "$ifname"
 423
 424                 else
 425                         # This uses a static host file entry for only limited addresses.
 426                         # Use dnsmasq option "--expandhosts" to enable FQDN on host files.
 427                         ulaprefix="$(uci_get network @globals[0] ula_prefix)"
 428                         network_get_ipaddr lanaddr "$net"
 429                         network_get_ipaddrs6 lanaddrs6 "$net"
 430
 431                         if [ -n "$lanaddr" ] ; then
 432                                 dhcp_domain_add "" "$routername" "$lanaddr"
 433                         fi
 434
 435                         if [ -n "$ulaprefix" ] && [ -n "$lanaddrs6" ] ; then
 436                                 for lanaddr6 in $lanaddrs6 ; do
 437                                         case "$lanaddr6" in
 438                                         "${ulaprefix%%:/*}"*)
 439                                                 dhcp_domain_add "" "$routername" "$lanaddr6"
 440                                                 ;;
 441                                         esac
 442                                 done
 443                         fi
 444                 fi
 445         fi
 446 }
 447
 448 dhcp_tag_add() {
 449         # NOTE: dnsmasq has explicit "option6:" prefix for DHCPv6 so no collisions
 450         local cfg="$1"
 451
 452         tag="$cfg"
 453
 454         [ -n "$tag" ] || return 0
 455
 456         config_get_bool force "$cfg" force 0
 457         [ "$force" = "0" ] && force=
 458
 459         config_get option "$cfg" dhcp_option
 460         for o in $option; do
 461                 xappend "--dhcp-option${force:+-force}=tag:$tag,$o"
 462         done
 463 }
 464
 465 dhcp_mac_add() {
 466         local cfg="$1"
 467
 468         config_get networkid "$cfg" networkid
 469         [ -n "$networkid" ] || return 0
 470
 471         config_get mac "$cfg" mac
 472         [ -n "$mac" ] || return 0
 473
 474         xappend "--dhcp-mac=$networkid,$mac"
 475
 476         dhcp_option_add "$cfg" "$networkid"
 477 }
 478
 479 dhcp_boot_add() {
 480         # TODO: BOOTURL is different between DHCPv4 and DHCPv6
 481         local cfg="$1"
 482
 483         config_get networkid "$cfg" networkid
 484
 485         config_get filename "$cfg" filename
 486         [ -n "$filename" ] || return 0
 487
 488         config_get servername "$cfg" servername
 489         config_get serveraddress "$cfg" serveraddress
 490
 491         [ -n "$serveraddress" ] && [ ! -n "$servername" ] && return 0
 492
 493         xappend "--dhcp-boot=${networkid:+net:$networkid,}${filename}${servername:+,$servername}${serveraddress:+,$serveraddress}"
 494
 495         config_get_bool force "$cfg" force 0
 496
 497         dhcp_option_add "$cfg" "$networkid" "$force"
 498 }
 499
 500
 501 dhcp_add() {
 502         local cfg="$1"
 503         local dhcp6range="::"
 504         local nettag
 505         local tags
 506
 507         config_get net "$cfg" interface
 508         [ -n "$net" ] || return 0
 509
 510         config_get networkid "$cfg" networkid
 511         [ -n "$networkid" ] || networkid="$net"
 512
 513         network_get_device ifname "$net" || return 0
 514
 515         [ "$cachelocal" = "0" ] && network_get_dnsserver dnsserver "$net" && {
 516                 DNS_SERVERS="$DNS_SERVERS $dnsserver"
 517         }
 518
 519         append_bool "$cfg" ignore "--no-dhcp-interface=$ifname" && {
 520                 # Many ISP do not have useful names for DHCP customers (your WAN).
 521                 dhcp_this_host_add "$net" "$ifname" "$ADD_WAN_FQDN"
 522                 return 0
 523         }
 524
 525         network_get_subnet subnet "$net" || return 0
 526         network_get_protocol proto "$net" || return 0
 527
 528         # Do not support non-static interfaces for now
 529         [ static = "$proto" ] || return 0
 530
 531         # Override interface netmask with dhcp config if applicable
 532         config_get netmask "$cfg" netmask "${subnet##*/}"
 533
 534         #check for an already active dhcp server on the interface, unless 'force' is set
 535         config_get_bool force "$cfg" force 0
 536         [ $force -gt 0 ] || dhcp_check "$ifname" || {
 537                 logger -t dnsmasq \
 538                         "found already running DHCP-server on interface '$ifname'" \
 539                         "refusing to start, use 'option force 1' to override"
 540                 return 0
 541         }
 542
 543         config_get start "$cfg" start 100
 544         config_get limit "$cfg" limit 150
 545         config_get leasetime "$cfg" leasetime 12h
 546         config_get options "$cfg" options
 547         config_get_bool dynamicdhcp "$cfg" dynamicdhcp 1
 548
 549         config_get dhcpv4 "$cfg" dhcpv4
 550         config_get dhcpv6 "$cfg" dhcpv6
 551
 552         config_get ra "$cfg" ra
 553         config_get ra_management "$cfg" ra_management
 554         config_get ra_preference "$cfg" ra_preference
 555         config_get dns "$cfg" dns
 556
 557         config_list_foreach "$cfg" "interface_name" append_interface_name "$ifname"
 558
 559         # Put the router host name on this DHCP served interface address(es)
 560         dhcp_this_host_add "$net" "$ifname" "$ADD_LOCAL_FQDN"
 561
 562         start="$( dhcp_calc "$start" )"
 563
 564         add_tag() {
 565                 tags="${tags}tag:$1,"
 566         }
 567         config_list_foreach "$cfg" tag add_tag
 568
 569         nettag="${networkid:+set:${networkid},}"
 570
 571         if [ "$limit" -gt 0 ] ; then
 572                 limit=$((limit-1))
 573         fi
 574
 575         eval "$(ipcalc.sh "${subnet%%/*}" $netmask $start $limit)"
 576
 577         if [ "$dynamicdhcp" = "0" ] ; then
 578                 END="static"
 579                 dhcp6range="::,static"
 580         else
 581                 dhcp6range="::1000,::ffff"
 582         fi
 583
 584
 585         if [ "$dhcpv4" != "disabled" ] ; then
 586                 xappend "--dhcp-range=$tags$nettag$START,$END,$NETMASK,$leasetime${options:+ $options}"
 587         fi
 588
 589
 590         if [ $DNSMASQ_DHCP_VER -eq 6 ] && [ "$ra" = "server" ] ; then
 591                 # Note: dnsmasq cannot just be a DHCPv6 server (all-in-1)
 592                 # and let some other machine(s) send RA pointing to it.
 593
 594                 case $ra_preference in
 595                 *high*)
 596                         xappend "--ra-param=$ifname,high,0,7200"
 597                         ;;
 598                 *low*)
 599                         xappend "--ra-param=$ifname,low,0,7200"
 600                         ;;
 601                 *)
 602                         # Send UNSOLICITED RA at default interval and live for 2 hours.
 603                         # TODO: convert flexible lease time into route life time (only seconds).
 604                         xappend "--ra-param=$ifname,0,7200"
 605                         ;;
 606                 esac
 607
 608                 if [ "$dhcpv6" = "disabled" ] ; then
 609                         ra_management="3"
 610                 fi
 611
 612
 613                 case $ra_management in
 614                 0)
 615                         # SLACC with DCHP for extended options
 616                         xappend "--dhcp-range=$nettag::,constructor:$ifname,ra-stateless,ra-names"
 617                         ;;
 618                 2)
 619                         # DHCP address and RA only for management redirection
 620                         xappend "--dhcp-range=$nettag$dhcp6range,constructor:$ifname,$leasetime"
 621                         ;;
 622                 3)
 623                         # SLAAC only but dnsmasq attempts to link HOSTNAME, DHCPv4 MAC, and SLAAC
 624                         xappend "--dhcp-range=$nettag::,constructor:$ifname,ra-only,ra-names"
 625                         ;;
 626                 *)
 627                         # SLAAC and full DHCP
 628                         xappend "--dhcp-range=$nettag$dhcp6range,constructor:$ifname,slaac,ra-names,$leasetime"
 629                         ;;
 630                 esac
 631
 632                 if [ -n "$dns" ]; then
 633                         dnss=""
 634                         for d in $dns; do append dnss "[$d]" ","; done
 635                 else
 636                         dnss="[::]"
 637                 fi
 638
 639                 dhcp_option_append "option6:dns-server,$dnss" "$networkid"
 640         fi
 641
 642         dhcp_option_add "$cfg" "$networkid" 0
 643         dhcp_option_add "$cfg" "$networkid" 2
 644 }
 645
 646 dhcp_option_append() {
 647         local option="$1"
 648         local networkid="$2"
 649         local force="$3"
 650
 651         xappend "--dhcp-option${force:+-force}=${networkid:+$networkid,}$option"
 652 }
 653
 654 dhcp_option_add() {
 655         # NOTE: dnsmasq has explicit "option6:" prefix for DHCPv6 so no collisions
 656         local cfg="$1"
 657         local networkid="$2"
 658         local force="$3"
 659         local opt="dhcp_option"
 660
 661         [ "$force" = "0" ] && force=
 662         [ "$force" = "2" ] && opt="dhcp_option_force"
 663
 664         local list_len
 665         config_get list_len "$cfg" "${opt}_LENGTH"
 666
 667         if [ -n "$list_len" ]; then
 668                 config_list_foreach "$cfg" "$opt" dhcp_option_append "$networkid" "$force"
 669         else
 670                 config_get dhcp_option "$cfg" "$opt"
 671
 672                 [ -n "$dhcp_option" ] && echo "Warning: the 'option $opt' syntax is deprecated, use 'list $opt'" >&2
 673
 674                 local option
 675                 for option in $dhcp_option; do
 676                         dhcp_option_append "$option" "$networkid" "$force"
 677                 done
 678         fi
 679 }
 680
 681 dhcp_domain_add() {
 682         local cfg="$1"
 683         local ip name names record
 684
 685         config_get names "$cfg" name "$2"
 686         [ -n "$names" ] || return 0
 687
 688         config_get ip "$cfg" ip "$3"
 689         [ -n "$ip" ] || return 0
 690
 691         for name in $names; do
 692                 record="${record:+$record }$name"
 693         done
 694
 695         echo "$ip $record" >> $HOSTFILE_TMP
 696 }
 697
 698 dhcp_srv_add() {
 699         local cfg="$1"
 700
 701         config_get srv "$cfg" srv
 702         [ -n "$srv" ] || return 0
 703
 704         config_get target "$cfg" target
 705         [ -n "$target" ] || return 0
 706
 707         config_get port "$cfg" port
 708         [ -n "$port" ] || return 0
 709
 710         config_get class "$cfg" class
 711         config_get weight "$cfg" weight
 712
 713         local service="$srv,$target,$port${class:+,$class${weight:+,$weight}}"
 714
 715         xappend "--srv-host=$service"
 716 }
 717
 718 dhcp_mx_add() {
 719         local cfg="$1"
 720         local domain relay pref
 721
 722         config_get domain "$cfg" domain
 723         [ -n "$domain" ] || return 0
 724
 725         config_get relay "$cfg" relay
 726         [ -n "$relay" ] || return 0
 727
 728         config_get pref "$cfg" pref 0
 729
 730         local service="$domain,$relay,$pref"
 731
 732         xappend "--mx-host=$service"
 733 }
 734
 735 dhcp_cname_add() {
 736         local cfg="$1"
 737         local cname target
 738
 739         config_get cname "$cfg" cname
 740         [ -n "$cname" ] || return 0
 741
 742         config_get target "$cfg" target
 743         [ -n "$target" ] || return 0
 744
 745         xappend "--cname=${cname},${target}"
 746 }
 747
 748 dhcp_hostrecord_add() {
 749         local cfg="$1"
 750         local names addresses record val
 751
 752         config_get names "$cfg" name "$2"
 753         if [ -z "$names" ]; then
 754                 return 0
 755         fi
 756
 757         config_get addresses "$cfg" ip "$3"
 758         if [ -z "$addresses" ]; then
 759                 return 0
 760         fi
 761
 762         for val in $names $addresses; do
 763                 record="${record:+$record,}$val"
 764         done
 765
 766         xappend "--host-record=$record"
 767 }
 768
 769 dhcp_relay_add() {
 770         local cfg="$1"
 771         local local_addr server_addr interface
 772
 773         config_get local_addr "$cfg" local_addr
 774         [ -n "$local_addr" ] || return 0
 775
 776         config_get server_addr "$cfg" server_addr
 777         [ -n "$server_addr" ] || return 0
 778
 779         config_get interface "$cfg" interface
 780         if [ -z "$interface" ]; then
 781                 xappend "--dhcp-relay=$local_addr,$server_addr"
 782         else
 783                 network_get_device ifname "$interface" || return
 784                 xappend "--dhcp-relay=$local_addr,$server_addr,$ifname"
 785         fi
 786 }
 787
 788 dnsmasq_ipset_add() {
 789         local cfg="$1"
 790         local ipsets domains
 791
 792         add_ipset() {
 793                 ipsets="${ipsets:+$ipsets,}$1"
 794         }
 795
 796         add_domain() {
 797                 # leading '/' is expected
 798                 domains="$domains/$1"
 799         }
 800
 801         config_list_foreach "$cfg" "name" add_ipset
 802         config_list_foreach "$cfg" "domain" add_domain
 803
 804         if [ -z "$ipsets" ] || [ -z "$domains" ]; then
 805                 return 0
 806         fi
 807
 808         xappend "--ipset=$domains/$ipsets"
 809 }
 810
 811 dnsmasq_start()
 812 {
 813         local cfg="$1"
 814         local disabled user_dhcpscript
 815         local resolvfile resolvdir localuse=0
 816
 817         config_get_bool disabled "$cfg" disabled 0
 818         [ "$disabled" -gt 0 ] && return 0
 819
 820         # reset list of DOMAINS, DNS servers and EXTRA mounts (for each dnsmasq instance)
 821         DNS_SERVERS=""
 822         DOMAIN=""
 823         EXTRA_MOUNT=""
 824         CONFIGFILE="${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 }