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 }" = "$dnsmasq_features" ] || dnsmasq_has_ipset=1
  36                 [ "${dnsmasq_features#* nftset }" = "$dnsmasq_features" ] || dnsmasq_has_nftset=1
  37         fi
  38
  39         case "$opt" in
  40                 dhcp-duid|\
  41                 ra-param)
  42                         [ -z "$dnsmasq_has_dhcp6" ] ;;
  43                 dhcp-*|\
  44                 bootp-*|\
  45                 pxe-*)
  46                         [ -z "$dnsmasq_has_dhcp" ] ;;
  47                 dnssec*|\
  48                 trust-anchor)
  49                         if [ -z "$dnsmasq_has_dnssec" ]; then
  50                                 echo "dnsmasq: \"$opt\" requested, but dnssec support is not available" >&2
  51                                 exit 1
  52                         fi
  53                         return 1
  54                         ;;
  55                 tftp-*)
  56                         [ -z "$dnsmasq_has_tftp" ] ;;
  57                 ipset)
  58                         [ -z "$dnsmasq_has_ipset" ] ;;
  59                 nftset)
  60                         [ -z "$dnsmasq_has_nftset" ] ;;
  61                 *)
  62                         return 1
  63         esac
  64 }
  65
  66 xappend() {
  67         local value="${1#--}"
  68         local opt="${value%%=*}"
  69
  70         if ! dnsmasq_ignore_opt "$opt"; then
  71                 echo "$value" >>$CONFIGFILE_TMP
  72         fi
  73 }
  74
  75 hex_to_hostid() {
  76         local var="$1"
  77         local hex="${2#0x}" # strip optional "0x" prefix
  78
  79         if [ -n "${hex//[0-9a-fA-F]/}" ]; then
  80                 # is invalid hex literal
  81                 return 1
  82         fi
  83
  84         # convert into host id
  85         export "$var=$(
  86                 printf "%0x:%0x" \
  87                 $(((0x$hex >> 16) % 65536)) \
  88                 $(( 0x$hex        % 65536))
  89                 )"
  90
  91         return 0
  92 }
  93
  94 dhcp_calc() {
  95         local ip="$1"
  96         local res=0
  97
  98         while [ -n "$ip" ]; do
  99                 part="${ip%%.*}"
 100                 res="$(($res * 256))"
 101                 res="$(($res + $part))"
 102                 [ "${ip%.*}" != "$ip" ] && ip="${ip#*.}" || ip=
 103         done
 104         echo "$res"
 105 }
 106
 107 dhcp_check() {
 108         local ifname="$1"
 109         local stamp="${BASEDHCPSTAMPFILE_CFG}.${ifname}.dhcp"
 110         local rv=0
 111
 112         [ -s "$stamp" ] && return $(cat "$stamp")
 113
 114         # If interface is down, skip it.
 115         # The init script will be called again once the link is up
 116         case "$(devstatus "$ifname" | jsonfilter -e @.up)" in
 117                 false) return 1;;
 118         esac
 119
 120         udhcpc -n -q -s /bin/true -t 1 -i "$ifname" >&- && rv=1 || rv=0
 121
 122         echo $rv > "$stamp"
 123         return $rv
 124 }
 125
 126 log_once() {
 127         pidof dnsmasq >/dev/null || \
 128                 logger -t dnsmasq "$@"
 129 }
 130
 131 has_handler() {
 132         local file
 133
 134         for file in /etc/hotplug.d/dhcp/* /etc/hotplug.d/tftp/* /etc/hotplug.d/neigh/*; do
 135                 [ -f "$file" ] && return 0
 136         done
 137
 138         return 1
 139 }
 140
 141 append_bool() {
 142         local section="$1"
 143         local option="$2"
 144         local value="$3"
 145         local default="$4"
 146         local _loctmp
 147         [ -z "$default" ] && default="0"
 148         config_get_bool _loctmp "$section" "$option" "$default"
 149         [ $_loctmp -gt 0 ] && xappend "$value"
 150 }
 151
 152 append_parm() {
 153         local section="$1"
 154         local option="$2"
 155         local switch="$3"
 156         local default="$4"
 157         local _loctmp
 158         config_get _loctmp "$section" "$option" "$default"
 159         [ -z "$_loctmp" ] && return 0
 160         xappend "$switch=$_loctmp"
 161 }
 162
 163 append_server() {
 164         xappend "--server=$1"
 165 }
 166
 167 append_rev_server() {
 168         xappend "--rev-server=$1"
 169 }
 170
 171 append_address() {
 172         xappend "--address=$1"
 173 }
 174
 175 append_connmark_allowlist() {
 176         xappend "--connmark-allowlist=$1"
 177 }
 178
 179 append_interface() {
 180         network_get_device ifname "$1" || ifname="$1"
 181         xappend "--interface=$ifname"
 182 }
 183
 184 append_listenaddress() {
 185         xappend "--listen-address=$1"
 186 }
 187
 188 append_notinterface() {
 189         network_get_device ifname "$1" || ifname="$1"
 190         xappend "--except-interface=$ifname"
 191 }
 192
 193 ismounted() {
 194         local filename="$1"
 195         local dirname
 196         for dirname in $EXTRA_MOUNT ; do
 197                 case "$filename" in
 198                         "${dirname}/"* | "${dirname}" )
 199                                 return 0
 200                                 ;;
 201                 esac
 202         done
 203
 204         return 1
 205 }
 206
 207 append_extramount() {
 208         ismounted "$1" || append EXTRA_MOUNT "$1"
 209 }
 210
 211 append_addnhosts() {
 212         append_extramount "$1"
 213         xappend "--addn-hosts=$1"
 214 }
 215
 216 append_bogusnxdomain() {
 217         xappend "--bogus-nxdomain=$1"
 218 }
 219
 220 append_pxe_service() {
 221         xappend "--pxe-service=$1"
 222 }
 223
 224 append_interface_name() {
 225         xappend "--interface-name=$1,$2"
 226 }
 227
 228 filter_dnsmasq() {
 229         local cfg="$1" func="$2" match_cfg="$3" found_cfg
 230
 231         # use entry when no instance entry set, or if it matches
 232         config_get found_cfg "$cfg" "instance"
 233         if [ -z "$found_cfg" ] || [ "$found_cfg" = "$match_cfg" ]; then
 234                 $func $cfg
 235         fi
 236 }
 237
 238 dhcp_subscrid_add() {
 239         local cfg="$1"
 240
 241         config_get networkid "$cfg" networkid
 242         [ -n "$networkid" ] || return 0
 243
 244         config_get subscriberid "$cfg" subscriberid
 245         [ -n "$subscriberid" ] || return 0
 246
 247         xappend "--dhcp-subscrid=set:$networkid,$subscriberid"
 248
 249         config_get_bool force "$cfg" force 0
 250
 251         dhcp_option_add "$cfg" "$networkid" "$force"
 252 }
 253
 254 dhcp_remoteid_add() {
 255         local cfg="$1"
 256
 257         config_get networkid "$cfg" networkid
 258         [ -n "$networkid" ] || return 0
 259
 260         config_get remoteid "$cfg" remoteid
 261         [ -n "$remoteid" ] || return 0
 262
 263         xappend "--dhcp-remoteid=set:$networkid,$remoteid"
 264
 265         config_get_bool force "$cfg" force 0
 266
 267         dhcp_option_add "$cfg" "$networkid" "$force"
 268 }
 269
 270 dhcp_circuitid_add() {
 271         # TODO: DHCPV6 does not have circuitid; catch "option6:"
 272         local cfg="$1"
 273
 274         config_get networkid "$cfg" networkid
 275         [ -n "$networkid" ] || return 0
 276
 277         config_get circuitid "$cfg" circuitid
 278         [ -n "$circuitid" ] || return 0
 279
 280         xappend "--dhcp-circuitid=set:$networkid,$circuitid"
 281
 282         config_get_bool force "$cfg" force 0
 283
 284         dhcp_option_add "$cfg" "$networkid" "$force"
 285 }
 286
 287 dhcp_userclass_add() {
 288         local cfg="$1"
 289
 290         config_get networkid "$cfg" networkid
 291         [ -n "$networkid" ] || return 0
 292
 293         config_get userclass "$cfg" userclass
 294         [ -n "$userclass" ] || return 0
 295
 296         xappend "--dhcp-userclass=set:$networkid,$userclass"
 297
 298         config_get_bool force "$cfg" force 0
 299
 300         dhcp_option_add "$cfg" "$networkid" "$force"
 301 }
 302
 303 dhcp_vendorclass_add() {
 304         # TODO: DHCPV6 vendor class has stricter definitions; catch? fixup?
 305         local cfg="$1"
 306
 307         config_get networkid "$cfg" networkid
 308         [ -n "$networkid" ] || return 0
 309
 310         config_get vendorclass "$cfg" vendorclass
 311         [ -n "$vendorclass" ] || return 0
 312
 313         xappend "--dhcp-vendorclass=set:$networkid,$vendorclass"
 314
 315         config_get_bool force "$cfg" force 0
 316
 317         dhcp_option_add "$cfg" "$networkid" "$force"
 318 }
 319
 320 dhcp_match_add() {
 321         local cfg="$1"
 322
 323         config_get networkid "$cfg" networkid
 324         [ -n "$networkid" ] || return 0
 325
 326         config_get match "$cfg" match
 327         [ -n "$match" ] || return 0
 328
 329         xappend "--dhcp-match=set:$networkid,$match"
 330
 331         config_get_bool force "$cfg" force 0
 332
 333         dhcp_option_add "$cfg" "$networkid" "$force"
 334 }
 335
 336 dhcp_host_add() {
 337         local cfg="$1"
 338         local hosttag nametime addrs duids macs tags mtags
 339
 340         config_get_bool force "$cfg" force 0
 341
 342         config_get networkid "$cfg" networkid
 343         [ -n "$networkid" ] && dhcp_option_add "$cfg" "$networkid" "$force"
 344
 345         config_get_bool enable "$cfg" enable 1
 346         [ "$enable" = "0" ] && return 0
 347
 348         config_get name "$cfg" name
 349         config_get ip "$cfg" ip
 350         config_get hostid "$cfg" hostid
 351
 352         [ -z "$ip" ] && [ -z "$name" ] && [ -z "$hostid" ] && return 0
 353
 354         config_get_bool dns "$cfg" dns 0
 355         [ "$dns" = "1" ] && [ -n "$ip" ] && [ -n "$name" ] && {
 356                 echo "$ip $name${DOMAIN:+.$DOMAIN}" >> $HOSTFILE_TMP
 357         }
 358
 359         config_get mac "$cfg" mac
 360         config_get duid "$cfg" duid
 361         config_get tag "$cfg" tag
 362
 363         add_tag() {
 364                 mtags="${mtags}tag:$1,"
 365         }
 366         config_list_foreach "$cfg" match_tag add_tag
 367
 368         if [ -n "$mac" ]; then
 369                 # --dhcp-host=00:20:e0:3b:13:af,192.168.0.199,lap
 370                 # many MAC are possible to track a laptop ON/OFF dock
 371                 for m in $mac; do append macs "$m" ","; done
 372         fi
 373
 374         if [ $DNSMASQ_DHCP_VER -eq 6 ] && [ -n "$duid" ]; then
 375                 # --dhcp-host=id:00:03:00:01:12:00:00:01:02:03,[::beef],lap
 376                 # one (virtual) machine gets one DUID per RFC3315
 377                 duids="id:${duid// */}"
 378         fi
 379
 380         if [ -z "$macs" ] && [ -z "$duids" ]; then
 381                 # --dhcp-host=lap,192.168.0.199,[::beef]
 382                 [ -n "$name" ] || return 0
 383                 macs="$name"
 384                 name=""
 385         fi
 386
 387         if [ -n "$hostid" ]; then
 388                 hex_to_hostid hostid "$hostid"
 389         fi
 390
 391         if [ -n "$tag" ]; then
 392                 for t in $tag; do append tags "$t" ",set:"; done
 393         fi
 394
 395         config_get_bool broadcast "$cfg" broadcast 0
 396         config_get leasetime "$cfg" leasetime
 397
 398         [ "$broadcast" = "0" ] && broadcast= || broadcast=",set:needs-broadcast"
 399
 400         hosttag="${networkid:+,set:${networkid}}${tags:+,set:${tags}}$broadcast"
 401         nametime="${name:+,$name}${leasetime:+,$leasetime}"
 402
 403         if [ $DNSMASQ_DHCP_VER -eq 6 ]; then
 404                 addrs="${ip:+,$ip}${hostid:+,[::$hostid]}"
 405                 xappend "--dhcp-host=$mtags$macs${duids:+,$duids}$hosttag$addrs$nametime"
 406         else
 407                 xappend "--dhcp-host=$mtags$macs$hosttag${ip:+,$ip}$nametime"
 408         fi
 409 }
 410
 411 dhcp_this_host_add() {
 412         local net="$1"
 413         local ifname="$2"
 414         local mode="$3"
 415         local routerstub routername ifdashname
 416         local lanaddr lanaddr6 lanaddrs6 ulaprefix
 417
 418         if [ "$mode" -gt 0 ] ; then
 419                 ifdashname="${ifname//./-}"
 420                 routerstub="$( md5sum /etc/os-release )"
 421                 routerstub="router-${routerstub// */}"
 422                 routername="$( uci_get system @system[0] hostname $routerstub )"
 423
 424                 if [ "$mode" -gt 1 ] ; then
 425                         if [ "$mode" -gt 2 ] ; then
 426                                 if [ "$mode" -gt 3 ] ; then
 427                                         append_interface_name "$ifdashname.$routername.$DOMAIN" "$ifname"
 428                                 fi
 429
 430                                 append_interface_name "$routername.$DOMAIN" "$ifname"
 431                         fi
 432
 433                         # All IP addresses discovered by dnsmasq will be labeled (except fe80::)
 434                         append_interface_name "$routername" "$ifname"
 435
 436                 else
 437                         # This uses a static host file entry for only limited addresses.
 438                         # Use dnsmasq option "--expandhosts" to enable FQDN on host files.
 439                         ulaprefix="$(uci_get network @globals[0] ula_prefix)"
 440                         network_get_ipaddr lanaddr "$net"
 441                         network_get_ipaddrs6 lanaddrs6 "$net"
 442
 443                         if [ -n "$lanaddr" ] ; then
 444                                 dhcp_domain_add "" "$routername" "$lanaddr"
 445                         fi
 446
 447                         if [ -n "$ulaprefix" ] && [ -n "$lanaddrs6" ] ; then
 448                                 for lanaddr6 in $lanaddrs6 ; do
 449                                         case "$lanaddr6" in
 450                                         "${ulaprefix%%:/*}"*)
 451                                                 dhcp_domain_add "" "$routername" "$lanaddr6"
 452                                                 ;;
 453                                         esac
 454                                 done
 455                         fi
 456                 fi
 457         fi
 458 }
 459
 460 dhcp_tag_add() {
 461         # NOTE: dnsmasq has explicit "option6:" prefix for DHCPv6 so no collisions
 462         local cfg="$1"
 463
 464         tag="$cfg"
 465
 466         [ -n "$tag" ] || return 0
 467
 468         config_get_bool force "$cfg" force 0
 469         [ "$force" = "0" ] && force=
 470
 471         config_get option "$cfg" dhcp_option
 472         for o in $option; do
 473                 xappend "--dhcp-option${force:+-force}=tag:$tag,$o"
 474         done
 475 }
 476
 477 dhcp_mac_add() {
 478         local cfg="$1"
 479
 480         config_get networkid "$cfg" networkid
 481         [ -n "$networkid" ] || return 0
 482
 483         config_get mac "$cfg" mac
 484         [ -n "$mac" ] || return 0
 485
 486         xappend "--dhcp-mac=$networkid,$mac"
 487
 488         dhcp_option_add "$cfg" "$networkid"
 489 }
 490
 491 dhcp_boot_add() {
 492         # TODO: BOOTURL is different between DHCPv4 and DHCPv6
 493         local cfg="$1"
 494
 495         config_get networkid "$cfg" networkid
 496
 497         config_get filename "$cfg" filename
 498         [ -n "$filename" ] || return 0
 499
 500         config_get servername "$cfg" servername
 501         config_get serveraddress "$cfg" serveraddress
 502
 503         [ -n "$serveraddress" ] && [ ! -n "$servername" ] && return 0
 504
 505         xappend "--dhcp-boot=${networkid:+net:$networkid,}${filename}${servername:+,$servername}${serveraddress:+,$serveraddress}"
 506
 507         config_get_bool force "$cfg" force 0
 508
 509         dhcp_option_add "$cfg" "$networkid" "$force"
 510 }
 511
 512
 513 dhcp_add() {
 514         local cfg="$1"
 515         local dhcp6range="::"
 516         local nettag
 517         local tags
 518
 519         config_get net "$cfg" interface
 520         [ -n "$net" ] || return 0
 521
 522         config_get networkid "$cfg" networkid
 523         [ -n "$networkid" ] || networkid="$net"
 524
 525         network_get_device ifname "$net" || return 0
 526
 527         [ "$cachelocal" = "0" ] && network_get_dnsserver dnsserver "$net" && {
 528                 DNS_SERVERS="$DNS_SERVERS $dnsserver"
 529         }
 530
 531         append_bool "$cfg" ignore "--no-dhcp-interface=$ifname" && {
 532                 # Many ISP do not have useful names for DHCP customers (your WAN).
 533                 dhcp_this_host_add "$net" "$ifname" "$ADD_WAN_FQDN"
 534                 return 0
 535         }
 536
 537         network_get_subnet subnet "$net" || return 0
 538         network_get_protocol proto "$net" || return 0
 539
 540         # Do not support non-static interfaces for now
 541         [ static = "$proto" ] || return 0
 542
 543         # Override interface netmask with dhcp config if applicable
 544         config_get netmask "$cfg" netmask "${subnet##*/}"
 545
 546         #check for an already active dhcp server on the interface, unless 'force' is set
 547         config_get_bool force "$cfg" force 0
 548         [ $force -gt 0 ] || dhcp_check "$ifname" || {
 549                 logger -t dnsmasq \
 550                         "found already running DHCP-server on interface '$ifname'" \
 551                         "refusing to start, use 'option force 1' to override"
 552                 return 0
 553         }
 554
 555         config_get start "$cfg" start 100
 556         config_get limit "$cfg" limit 150
 557         config_get leasetime "$cfg" leasetime 12h
 558         config_get options "$cfg" options
 559         config_get_bool dynamicdhcp "$cfg" dynamicdhcp 1
 560
 561         config_get dhcpv4 "$cfg" dhcpv4
 562         config_get dhcpv6 "$cfg" dhcpv6
 563
 564         config_get ra "$cfg" ra
 565         config_get ra_management "$cfg" ra_management
 566         config_get ra_preference "$cfg" ra_preference
 567         config_get dns "$cfg" dns
 568
 569         config_list_foreach "$cfg" "interface_name" append_interface_name "$ifname"
 570
 571         # Put the router host name on this DHCP served interface address(es)
 572         dhcp_this_host_add "$net" "$ifname" "$ADD_LOCAL_FQDN"
 573
 574         start="$( dhcp_calc "$start" )"
 575
 576         add_tag() {
 577                 tags="${tags}tag:$1,"
 578         }
 579         config_list_foreach "$cfg" tag add_tag
 580
 581         nettag="${networkid:+set:${networkid},}"
 582
 583         if [ "$limit" -gt 0 ] ; then
 584                 limit=$((limit-1))
 585         fi
 586
 587         # make sure the DHCP range is not empty
 588         if [ "$dhcpv4" != "disabled" ] && eval "$(ipcalc.sh "${subnet%%/*}" "$netmask" "$start" "$limit")" ; then
 589                 [ "$dynamicdhcp" = "0" ] && END="static"
 590
 591                 xappend "--dhcp-range=$tags$nettag$START,$END,$NETMASK,$leasetime${options:+ $options}"
 592         fi
 593
 594         if [ "$dynamicdhcp" = "0" ] ; then
 595                 dhcp6range="::,static"
 596         else
 597                 dhcp6range="::1000,::ffff"
 598         fi
 599
 600
 601         if [ $DNSMASQ_DHCP_VER -eq 6 ] && [ "$ra" = "server" ] ; then
 602                 # Note: dnsmasq cannot just be a DHCPv6 server (all-in-1)
 603                 # and let some other machine(s) send RA pointing to it.
 604
 605                 case $ra_preference in
 606                 *high*)
 607                         xappend "--ra-param=$ifname,high,0,7200"
 608                         ;;
 609                 *low*)
 610                         xappend "--ra-param=$ifname,low,0,7200"
 611                         ;;
 612                 *)
 613                         # Send UNSOLICITED RA at default interval and live for 2 hours.
 614                         # TODO: convert flexible lease time into route life time (only seconds).
 615                         xappend "--ra-param=$ifname,0,7200"
 616                         ;;
 617                 esac
 618
 619                 if [ "$dhcpv6" = "disabled" ] ; then
 620                         ra_management="3"
 621                 fi
 622
 623
 624                 case $ra_management in
 625                 0)
 626                         # SLACC with DCHP for extended options
 627                         xappend "--dhcp-range=$nettag::,constructor:$ifname,ra-stateless,ra-names"
 628                         ;;
 629                 2)
 630                         # DHCP address and RA only for management redirection
 631                         xappend "--dhcp-range=$nettag$dhcp6range,constructor:$ifname,$leasetime"
 632                         ;;
 633                 3)
 634                         # SLAAC only but dnsmasq attempts to link HOSTNAME, DHCPv4 MAC, and SLAAC
 635                         xappend "--dhcp-range=$nettag::,constructor:$ifname,ra-only,ra-names"
 636                         ;;
 637                 *)
 638                         # SLAAC and full DHCP
 639                         xappend "--dhcp-range=$nettag$dhcp6range,constructor:$ifname,slaac,ra-names,$leasetime"
 640                         ;;
 641                 esac
 642
 643                 if [ -n "$dns" ]; then
 644                         dnss=""
 645                         for d in $dns; do append dnss "[$d]" ","; done
 646                 else
 647                         dnss="[::]"
 648                 fi
 649
 650                 dhcp_option_append "option6:dns-server,$dnss" "$networkid"
 651         fi
 652
 653         dhcp_option_add "$cfg" "$networkid" 0
 654         dhcp_option_add "$cfg" "$networkid" 2
 655 }
 656
 657 dhcp_option_append() {
 658         local option="$1"
 659         local networkid="$2"
 660         local force="$3"
 661
 662         xappend "--dhcp-option${force:+-force}=${networkid:+$networkid,}$option"
 663 }
 664
 665 dhcp_option_add() {
 666         # NOTE: dnsmasq has explicit "option6:" prefix for DHCPv6 so no collisions
 667         local cfg="$1"
 668         local networkid="$2"
 669         local force="$3"
 670         local opt="dhcp_option"
 671
 672         [ "$force" = "0" ] && force=
 673         [ "$force" = "2" ] && opt="dhcp_option_force"
 674
 675         local list_len
 676         config_get list_len "$cfg" "${opt}_LENGTH"
 677
 678         if [ -n "$list_len" ]; then
 679                 config_list_foreach "$cfg" "$opt" dhcp_option_append "$networkid" "$force"
 680         else
 681                 config_get dhcp_option "$cfg" "$opt"
 682
 683                 [ -n "$dhcp_option" ] && echo "Warning: the 'option $opt' syntax is deprecated, use 'list $opt'" >&2
 684
 685                 local option
 686                 for option in $dhcp_option; do
 687                         dhcp_option_append "$option" "$networkid" "$force"
 688                 done
 689         fi
 690 }
 691
 692 dhcp_domain_add() {
 693         local cfg="$1"
 694         local ip name names record
 695
 696         config_get names "$cfg" name "$2"
 697         [ -n "$names" ] || return 0
 698
 699         config_get ip "$cfg" ip "$3"
 700         [ -n "$ip" ] || return 0
 701
 702         for name in $names; do
 703                 record="${record:+$record }$name"
 704         done
 705
 706         echo "$ip $record" >> $HOSTFILE_TMP
 707 }
 708
 709 dhcp_srv_add() {
 710         local cfg="$1"
 711
 712         config_get srv "$cfg" srv
 713         [ -n "$srv" ] || return 0
 714
 715         config_get target "$cfg" target
 716         [ -n "$target" ] || return 0
 717
 718         config_get port "$cfg" port
 719         [ -n "$port" ] || return 0
 720
 721         config_get class "$cfg" class
 722         config_get weight "$cfg" weight
 723
 724         local service="$srv,$target,$port${class:+,$class${weight:+,$weight}}"
 725
 726         xappend "--srv-host=$service"
 727 }
 728
 729 dhcp_mx_add() {
 730         local cfg="$1"
 731         local domain relay pref
 732
 733         config_get domain "$cfg" domain
 734         [ -n "$domain" ] || return 0
 735
 736         config_get relay "$cfg" relay
 737         [ -n "$relay" ] || return 0
 738
 739         config_get pref "$cfg" pref 0
 740
 741         local service="$domain,$relay,$pref"
 742
 743         xappend "--mx-host=$service"
 744 }
 745
 746 dhcp_cname_add() {
 747         local cfg="$1"
 748         local cname target
 749
 750         config_get cname "$cfg" cname
 751         [ -n "$cname" ] || return 0
 752
 753         config_get target "$cfg" target
 754         [ -n "$target" ] || return 0
 755
 756         xappend "--cname=${cname},${target}"
 757 }
 758
 759 dhcp_hostrecord_add() {
 760         local cfg="$1"
 761         local names addresses record val
 762
 763         config_get names "$cfg" name "$2"
 764         if [ -z "$names" ]; then
 765                 return 0
 766         fi
 767
 768         config_get addresses "$cfg" ip "$3"
 769         if [ -z "$addresses" ]; then
 770                 return 0
 771         fi
 772
 773         for val in $names $addresses; do
 774                 record="${record:+$record,}$val"
 775         done
 776
 777         xappend "--host-record=$record"
 778 }
 779
 780 dhcp_relay_add() {
 781         local cfg="$1"
 782         local local_addr server_addr interface
 783
 784         config_get local_addr "$cfg" local_addr
 785         [ -n "$local_addr" ] || return 0
 786
 787         config_get server_addr "$cfg" server_addr
 788         [ -n "$server_addr" ] || return 0
 789
 790         config_get interface "$cfg" interface
 791         if [ -z "$interface" ]; then
 792                 xappend "--dhcp-relay=$local_addr,$server_addr"
 793         else
 794                 network_get_device ifname "$interface" || return
 795                 xappend "--dhcp-relay=$local_addr,$server_addr,$ifname"
 796         fi
 797 }
 798
 799 dnsmasq_ipset_add() {
 800         local cfg="$1"
 801         local ipsets nftsets domains
 802
 803         add_ipset() {
 804                 ipsets="${ipsets:+$ipsets,}$1"
 805         }
 806
 807         add_nftset() {
 808                 local IFS=,
 809                 for set in $1; do
 810                         local fam="$family"
 811                         [ -n "$fam" ] || fam=$(echo "$set" | sed -nre \
 812                                 's#^.*[^0-9]([46])$|^.*[-_]([46])[-_].*$|^([46])[^0-9].*$#\1\2\3#p')
 813                         [ -n "$fam" ] || \
 814                                 fam=$(nft -t list set "$table_family" "$table" "$set" 2>&1 | sed -nre \
 815                                 's#^\t\ttype .*\bipv([46])_addr\b.*$#\1#p')
 816
 817                         [ -n "$fam" ] || \
 818                                 logger -t dnsmasq "Cannot infer address family from non-existent nftables set '$set'"
 819
 820                         nftsets="${nftsets:+$nftsets,}${fam:+$fam#}$table_family#$table#$set"
 821                 done
 822         }
 823
 824         add_domain() {
 825                 # leading '/' is expected
 826                 domains="$domains/$1"
 827         }
 828
 829         config_get table "$cfg" table 'fw4'
 830         config_get table_family "$cfg" table_family 'inet'
 831         if [ "$table_family" = "ip" ] ; then
 832                 family="4"
 833         elif [ "$table_family" = "ip6" ] ; then
 834                 family="6"
 835         else
 836                 config_get family "$cfg" family
 837         fi
 838
 839         config_list_foreach "$cfg" "name" add_ipset
 840         config_list_foreach "$cfg" "name" add_nftset
 841         config_list_foreach "$cfg" "domain" add_domain
 842
 843         if [ -z "$ipsets" ] || [ -z "$nftsets" ] || [ -z "$domains" ]; then
 844                 return 0
 845         fi
 846
 847         xappend "--ipset=$domains/$ipsets"
 848         xappend "--nftset=$domains/$nftsets"
 849 }
 850
 851 dnsmasq_start()
 852 {
 853         local cfg="$1"
 854         local disabled user_dhcpscript logfacility
 855         local resolvfile resolvdir localuse=0
 856
 857         config_get_bool disabled "$cfg" disabled 0
 858         [ "$disabled" -gt 0 ] && return 0
 859
 860         # reset list of DOMAINS, DNS servers and EXTRA mounts (for each dnsmasq instance)
 861         DNS_SERVERS=""
 862         DOMAIN=""
 863         EXTRA_MOUNT=""
 864         CONFIGFILE="${BASECONFIGFILE}.${cfg}"
 865         CONFIGFILE_TMP="${CONFIGFILE}.$$"
 866         HOSTFILE="${BASEHOSTFILE}.${cfg}"
 867         HOSTFILE_TMP="${HOSTFILE}.$$"
 868         HOSTFILE_DIR="$(dirname "$HOSTFILE")"
 869         BASEDHCPSTAMPFILE_CFG="${BASEDHCPSTAMPFILE}.${cfg}"
 870
 871         # before we can call xappend
 872         umask u=rwx,g=rx,o=rx
 873         mkdir -p /var/run/dnsmasq/
 874         mkdir -p $(dirname $CONFIGFILE)
 875         mkdir -p "$HOSTFILE_DIR"
 876         mkdir -p /var/lib/misc
 877         chown dnsmasq:dnsmasq /var/run/dnsmasq
 878
 879         echo "# auto-generated config file from /etc/config/dhcp" > $CONFIGFILE_TMP
 880         echo "# auto-generated config file from /etc/config/dhcp" > $HOSTFILE_TMP
 881
 882         local dnsmasqconffile="/etc/dnsmasq.${cfg}.conf"
 883         if [ ! -r "$dnsmasqconffile" ]; then
 884                 dnsmasqconffile=/etc/dnsmasq.conf
 885         fi
 886
 887         # if we did this last, we could override auto-generated config
 888         [ -f "${dnsmasqconffile}" ] && {
 889                 xappend "--conf-file=${dnsmasqconffile}"
 890         }
 891
 892         $PROG --version | grep -osqE "^Compile time options:.* DHCPv6( |$)" && DHCPv6CAPABLE=1 || DHCPv6CAPABLE=0
 893
 894
 895         if [ -x /usr/sbin/odhcpd ] && [ -x /etc/init.d/odhcpd ] ; then
 896                 local odhcpd_is_main odhcpd_is_enabled
 897                 config_get odhcpd_is_main odhcpd maindhcp 0
 898                 /etc/init.d/odhcpd enabled && odhcpd_is_enabled=1 || odhcpd_is_enabled=0
 899
 900
 901                 if [ "$odhcpd_is_enabled" -eq 0 ] && [ "$DHCPv6CAPABLE" -eq 1 ] ; then
 902                         # DHCP V4 and V6 in DNSMASQ
 903                         DNSMASQ_DHCP_VER=6
 904                 elif [ "$odhcpd_is_main" -gt 0 ] ; then
 905                         # ODHCPD is doing it all
 906                         DNSMASQ_DHCP_VER=0
 907                 else
 908                         # You have ODHCPD but use DNSMASQ for DHCPV4
 909                         DNSMASQ_DHCP_VER=4
 910                 fi
 911
 912         elif [ "$DHCPv6CAPABLE" -eq 1 ] ; then
 913                 # DHCP V4 and V6 in DNSMASQ
 914                 DNSMASQ_DHCP_VER=6
 915         else
 916                 DNSMASQ_DHCP_VER=4
 917         fi
 918
 919         # Allow DHCP/DHCPv6 to be handled by ISC DHCPD
 920         if [ -x /usr/sbin/dhcpd ] ; then
 921                 if [ -x /etc/init.d/dhcpd ] ; then
 922                         /etc/init.d/dhcpd enabled && DNSMASQ_DHCP_VER=0
 923                 fi
 924                 if [ -x /etc/init.d/dhcpd6 ] && [ "$DNSMASQ_DHCP_VER" -gt 0 ] ; then
 925                         /etc/init.d/dhcpd6 enabled && DNSMASQ_DHCP_VER=4
 926                 fi
 927         fi
 928
 929         append_bool "$cfg" authoritative "--dhcp-authoritative"
 930         append_bool "$cfg" nodaemon "--no-daemon"
 931         append_bool "$cfg" domainneeded "--domain-needed"
 932         append_bool "$cfg" filterwin2k "--filterwin2k"
 933         append_bool "$cfg" nohosts "--no-hosts"
 934         append_bool "$cfg" nonegcache "--no-negcache"
 935         append_bool "$cfg" strictorder "--strict-order"
 936         append_bool "$cfg" logqueries "--log-queries=extra"
 937         append_bool "$cfg" noresolv "--no-resolv"
 938         append_bool "$cfg" localise_queries "--localise-queries"
 939         append_bool "$cfg" readethers "--read-ethers"
 940
 941         local instance_name="dnsmasq.$cfg"
 942         if [ "$cfg" = "$DEFAULT_INSTANCE" ]; then
 943                 instance_name="dnsmasq"
 944         fi
 945         config_get_bool dbus "$cfg" "dbus" 0
 946         [ $dbus -gt 0 ] && xappend "--enable-dbus=uk.org.thekelleys.$instance_name"
 947         config_get_bool ubus "$cfg" "ubus" 1
 948         [ $ubus -gt 0 ] && xappend "--enable-ubus=$instance_name"
 949
 950         append_bool "$cfg" expandhosts "--expand-hosts"
 951         config_get tftp_root "$cfg" "tftp_root"
 952         [ -n "$tftp_root" ] && mkdir -p "$tftp_root" && append_bool "$cfg" enable_tftp "--enable-tftp"
 953         append_bool "$cfg" tftp_no_fail "--tftp-no-fail"
 954         append_bool "$cfg" nonwildcard "--bind-dynamic" 1
 955         append_bool "$cfg" fqdn "--dhcp-fqdn"
 956         append_bool "$cfg" proxydnssec "--proxy-dnssec"
 957         append_bool "$cfg" localservice "--local-service"
 958         append_bool "$cfg" logdhcp "--log-dhcp"
 959         append_bool "$cfg" quietdhcp "--quiet-dhcp"
 960         append_bool "$cfg" sequential_ip "--dhcp-sequential-ip"
 961         append_bool "$cfg" allservers "--all-servers"
 962         append_bool "$cfg" noping "--no-ping"
 963         append_bool "$cfg" rapidcommit "--dhcp-rapid-commit"
 964         append_bool "$cfg" scriptarp "--script-arp"
 965
 966         append_bool "$cfg" filter_aaaa "--filter-AAAA"
 967         append_bool "$cfg" filter_a "--filter-A"
 968
 969         append_parm "$cfg" logfacility "--log-facility"
 970         config_get logfacility "$cfg" "logfacility"
 971         append_parm "$cfg" cachesize "--cache-size"
 972         append_parm "$cfg" dnsforwardmax "--dns-forward-max"
 973         append_parm "$cfg" port "--port"
 974         append_parm "$cfg" ednspacket_max "--edns-packet-max"
 975         append_parm "$cfg" dhcpleasemax "--dhcp-lease-max"
 976         append_parm "$cfg" "queryport" "--query-port"
 977         append_parm "$cfg" "minport" "--min-port"
 978         append_parm "$cfg" "maxport" "--max-port"
 979         append_parm "$cfg" "domain" "--domain"
 980         append_parm "$cfg" "local" "--local"
 981         config_list_foreach "$cfg" "listen_address" append_listenaddress
 982         config_list_foreach "$cfg" "server" append_server
 983         config_list_foreach "$cfg" "rev_server" append_rev_server
 984         config_list_foreach "$cfg" "address" append_address
 985
 986         local connmark_allowlist_enable
 987         config_get connmark_allowlist_enable "$cfg" connmark_allowlist_enable 0
 988         [ "$connmark_allowlist_enable" -gt 0 ] && {
 989                 append_parm "$cfg" "connmark_allowlist_enable" "--connmark-allowlist-enable"
 990                 config_list_foreach "$cfg" "connmark_allowlist" append_connmark_allowlist
 991         }
 992
 993         [ -n "$BOOT" ] || {
 994                 config_list_foreach "$cfg" "interface" append_interface
 995                 config_list_foreach "$cfg" "notinterface" append_notinterface
 996         }
 997         config_get_bool ignore_hosts_dir "$cfg" ignore_hosts_dir 0
 998         if [ "$ignore_hosts_dir" = "1" ]; then
 999                 xappend "--addn-hosts=$HOSTFILE"
1000                 append EXTRA_MOUNT "$HOSTFILE"
1001         else
1002                 xappend "--addn-hosts=$HOSTFILE_DIR"
1003                 append EXTRA_MOUNT "$HOSTFILE_DIR"
1004         fi
1005         config_list_foreach "$cfg" "addnhosts" append_addnhosts
1006         config_list_foreach "$cfg" "bogusnxdomain" append_bogusnxdomain
1007         append_parm "$cfg" "leasefile" "--dhcp-leasefile" "/tmp/dhcp.leases"
1008
1009         local serversfile
1010         config_get serversfile "$cfg" "serversfile"
1011         [ -n "$serversfile" ] && {
1012                 xappend "--servers-file=$serversfile"
1013                 append EXTRA_MOUNT "$serversfile"
1014         }
1015
1016         append_parm "$cfg" "tftp_root" "--tftp-root"
1017         append_parm "$cfg" "dhcp_boot" "--dhcp-boot"
1018         append_parm "$cfg" "local_ttl" "--local-ttl"
1019         append_parm "$cfg" "max_ttl" "--max-ttl"
1020         append_parm "$cfg" "min_cache_ttl" "--min-cache-ttl"
1021         append_parm "$cfg" "max_cache_ttl" "--max-cache-ttl"
1022         append_parm "$cfg" "pxe_prompt" "--pxe-prompt"
1023         append_parm "$cfg" "tftp_unique_root" "--tftp-unique-root"
1024         config_list_foreach "$cfg" "pxe_service" append_pxe_service
1025         config_get DOMAIN "$cfg" domain
1026
1027         config_get_bool ADD_LOCAL_DOMAIN "$cfg" add_local_domain 1
1028         config_get_bool ADD_LOCAL_HOSTNAME "$cfg" add_local_hostname 1
1029         config_get ADD_LOCAL_FQDN "$cfg" add_local_fqdn ""
1030         config_get ADD_WAN_FQDN "$cfg" add_wan_fqdn 0
1031
1032         if [ -z "$ADD_LOCAL_FQDN" ] ; then
1033                 # maintain support for previous UCI
1034                 ADD_LOCAL_FQDN="$ADD_LOCAL_HOSTNAME"
1035         fi
1036
1037         config_get user_dhcpscript $cfg dhcpscript
1038         if has_handler || [ -n "$user_dhcpscript" ]; then
1039                 xappend "--dhcp-script=$DHCPSCRIPT"
1040                 xappend "--script-arp"
1041         fi
1042
1043         config_get leasefile $cfg leasefile "/tmp/dhcp.leases"
1044         [ -n "$leasefile" ] && [ ! -e "$leasefile" ] && touch "$leasefile"
1045         config_get_bool cachelocal "$cfg" cachelocal 1
1046
1047         config_get_bool noresolv "$cfg" noresolv 0
1048         if [ "$noresolv" != "1" ]; then
1049                 config_get resolvfile "$cfg" resolvfile /tmp/resolv.conf.d/resolv.conf.auto
1050                 [ -n "$resolvfile" ] && [ ! -e "$resolvfile" ] && touch "$resolvfile"
1051                 xappend "--resolv-file=$resolvfile"
1052                 [ "$resolvfile" = "/tmp/resolv.conf.d/resolv.conf.auto" ] && localuse=1
1053                 resolvdir="$(dirname "$resolvfile")"
1054         fi
1055         config_get_bool localuse "$cfg" localuse "$localuse"
1056
1057         config_get hostsfile "$cfg" dhcphostsfile
1058         [ -e "$hostsfile" ] && xappend "--dhcp-hostsfile=$hostsfile"
1059
1060         local rebind
1061         config_get_bool rebind "$cfg" rebind_protection 1
1062         [ $rebind -gt 0 ] && {
1063                 log_once \
1064                         "DNS rebinding protection is active," \
1065                         "will discard upstream RFC1918 responses!"
1066                 xappend "--stop-dns-rebind"
1067
1068                 local rebind_localhost
1069                 config_get_bool rebind_localhost "$cfg" rebind_localhost 0
1070                 [ $rebind_localhost -gt 0 ] && {
1071                         log_once "Allowing 127.0.0.0/8 responses"
1072                         xappend "--rebind-localhost-ok"
1073                 }
1074
1075                 append_rebind_domain() {
1076                         log_once "Allowing RFC1918 responses for domain $1"
1077                         xappend "--rebind-domain-ok=$1"
1078                 }
1079
1080                 config_list_foreach "$cfg" rebind_domain append_rebind_domain
1081         }
1082
1083         config_get_bool dnssec "$cfg" dnssec 0
1084         [ "$dnssec" -gt 0 ] && {
1085                 xappend "--conf-file=$TRUSTANCHORSFILE"
1086                 xappend "--dnssec"
1087                 [ -x /etc/init.d/sysntpd ] && {
1088                         if /etc/init.d/sysntpd enabled || [ "$(uci_get system.ntp.enabled)" = "1" ] ; then
1089                                 [ -f "$TIMEVALIDFILE" ] || xappend "--dnssec-no-timecheck"
1090                         fi
1091                 }
1092                 config_get_bool dnsseccheckunsigned "$cfg" dnsseccheckunsigned 1
1093                 [ "$dnsseccheckunsigned" -eq 0 ] && xappend "--dnssec-check-unsigned=no"
1094         }
1095
1096         config_get addmac "$cfg" addmac 0
1097         [ "$addmac" != "0" ] && {
1098                 [ "$addmac" = "1" ] && addmac=
1099                 xappend "--add-mac${addmac:+="$addmac"}"
1100         }
1101
1102         dhcp_option_add "$cfg" "" 0
1103         dhcp_option_add "$cfg" "" 2
1104
1105         xappend "--dhcp-broadcast=tag:needs-broadcast"
1106
1107
1108         config_get dnsmasqconfdir "$cfg" confdir "/tmp/dnsmasq.d"
1109         xappend "--conf-dir=$dnsmasqconfdir"
1110         dnsmasqconfdir="${dnsmasqconfdir%%,*}"
1111         [ ! -d "$dnsmasqconfdir" ] && mkdir -p $dnsmasqconfdir
1112         xappend "--user=dnsmasq"
1113         xappend "--group=dnsmasq"
1114         echo >> $CONFIGFILE_TMP
1115
1116         config_get_bool enable_tftp "$cfg" enable_tftp 0
1117         [ "$enable_tftp" -gt 0 ] && {
1118                 config_get tftp_root "$cfg" tftp_root
1119                 append EXTRA_MOUNT $tftp_root
1120         }
1121
1122         config_foreach filter_dnsmasq host dhcp_host_add "$cfg"
1123         echo >> $CONFIGFILE_TMP
1124
1125         config_get_bool dhcpbogushostname "$cfg" dhcpbogushostname 1
1126         [ "$dhcpbogushostname" -gt 0 ] && {
1127                 xappend "--dhcp-ignore-names=tag:dhcp_bogus_hostname"
1128                 [ -r "$DHCPBOGUSHOSTNAMEFILE" ] && xappend "--conf-file=$DHCPBOGUSHOSTNAMEFILE"
1129         }
1130
1131         config_foreach filter_dnsmasq boot dhcp_boot_add "$cfg"
1132         config_foreach filter_dnsmasq mac dhcp_mac_add "$cfg"
1133         config_foreach filter_dnsmasq tag dhcp_tag_add "$cfg"
1134         config_foreach filter_dnsmasq vendorclass dhcp_vendorclass_add "$cfg"
1135         config_foreach filter_dnsmasq userclass dhcp_userclass_add "$cfg"
1136         config_foreach filter_dnsmasq circuitid dhcp_circuitid_add "$cfg"
1137         config_foreach filter_dnsmasq remoteid dhcp_remoteid_add "$cfg"
1138         config_foreach filter_dnsmasq subscrid dhcp_subscrid_add "$cfg"
1139         config_foreach filter_dnsmasq match dhcp_match_add "$cfg"
1140         config_foreach filter_dnsmasq domain dhcp_domain_add "$cfg"
1141         config_foreach filter_dnsmasq hostrecord dhcp_hostrecord_add "$cfg"
1142         [ -n "$BOOT" ] || config_foreach filter_dnsmasq relay dhcp_relay_add "$cfg"
1143
1144         echo >> $CONFIGFILE_TMP
1145         config_foreach filter_dnsmasq srvhost dhcp_srv_add "$cfg"
1146         config_foreach filter_dnsmasq mxhost dhcp_mx_add "$cfg"
1147         echo >> $CONFIGFILE_TMP
1148
1149         config_get_bool boguspriv "$cfg" boguspriv 1
1150         [ "$boguspriv" -gt 0 ] && {
1151                 xappend "--bogus-priv"
1152                 [ -r "$RFC6761FILE" ] && xappend "--conf-file=$RFC6761FILE"
1153         }
1154
1155         if [ "$DNSMASQ_DHCP_VER" -gt 4 ] ; then
1156                 # Enable RA feature for when/if it is constructed,
1157                 # and RA is selected per interface pool (RA, DHCP, or both),
1158                 # but no one (should) want RA broadcast in syslog
1159                 [ -n "$BOOT" ] || config_foreach filter_dnsmasq dhcp dhcp_add "$cfg"
1160                 xappend "--enable-ra"
1161                 xappend "--quiet-ra"
1162                 append_bool "$cfg" quietdhcp "--quiet-dhcp6"
1163
1164         elif [ "$DNSMASQ_DHCP_VER" -gt 0 ] ; then
1165                 [ -n "$BOOT" ] || config_foreach filter_dnsmasq dhcp dhcp_add "$cfg"
1166         fi
1167
1168
1169         echo >> $CONFIGFILE_TMP
1170         config_foreach filter_dnsmasq cname dhcp_cname_add "$cfg"
1171         echo >> $CONFIGFILE_TMP
1172
1173         echo >> $CONFIGFILE_TMP
1174         config_foreach filter_dnsmasq ipset dnsmasq_ipset_add "$cfg"
1175         echo >> $CONFIGFILE_TMP
1176
1177         mv -f $CONFIGFILE_TMP $CONFIGFILE
1178         mv -f $HOSTFILE_TMP $HOSTFILE
1179
1180         [ "$localuse" -gt 0 ] && {
1181                 rm -f /tmp/resolv.conf
1182                 [ $ADD_LOCAL_DOMAIN -eq 1 ] && [ -n "$DOMAIN" ] && {
1183                         echo "search $DOMAIN" >> /tmp/resolv.conf
1184                 }
1185                 DNS_SERVERS="$DNS_SERVERS 127.0.0.1"
1186                 [ -e /proc/sys/net/ipv6 ] && DNS_SERVERS="$DNS_SERVERS ::1"
1187                 for DNS_SERVER in $DNS_SERVERS ; do
1188                         echo "nameserver $DNS_SERVER" >> /tmp/resolv.conf
1189                 done
1190         }
1191
1192         config_list_foreach "$cfg" addnmount append_extramount
1193
1194         procd_open_instance $cfg
1195         procd_set_param command $PROG -C $CONFIGFILE -k -x /var/run/dnsmasq/dnsmasq."${cfg}".pid
1196         procd_set_param file $CONFIGFILE
1197         [ -n "$user_dhcpscript" ] && procd_set_param env USER_DHCPSCRIPT="$user_dhcpscript"
1198         procd_set_param respawn
1199
1200         local instance_ifc instance_netdev
1201         config_get instance_ifc "$cfg" interface
1202         [ -n "$instance_ifc" ] && network_get_device instance_netdev "$instance_ifc" &&
1203                 [ -n "$instance_netdev" ] && procd_set_param netdev $instance_netdev
1204
1205         procd_add_jail dnsmasq ubus log
1206         procd_add_jail_mount $CONFIGFILE $DHCPBOGUSHOSTNAMEFILE $DHCPSCRIPT $DHCPSCRIPT_DEPENDS
1207         procd_add_jail_mount $EXTRA_MOUNT $RFC6761FILE $TRUSTANCHORSFILE
1208         procd_add_jail_mount $dnsmasqconffile $dnsmasqconfdir $resolvdir $user_dhcpscript
1209         procd_add_jail_mount /etc/passwd /etc/group /etc/TZ /etc/hosts /etc/ethers
1210         procd_add_jail_mount_rw /var/run/dnsmasq/ $leasefile
1211         case "$logfacility" in */*)
1212                 [ ! -e "$logfacility" ] && touch "$logfacility"
1213                 procd_add_jail_mount_rw "$logfacility"
1214         esac
1215
1216         procd_close_instance
1217 }
1218
1219 dnsmasq_stop()
1220 {
1221         local cfg="$1"
1222         local noresolv resolvfile localuse=0
1223
1224         config_get_bool noresolv "$cfg" noresolv 0
1225         config_get resolvfile "$cfg" "resolvfile"
1226
1227         [ "$noresolv" = 0 ] && [ "$resolvfile" = "/tmp/resolv.conf.d/resolv.conf.auto" ] && localuse=1
1228         config_get_bool localuse "$cfg" localuse "$localuse"
1229         [ "$localuse" -gt 0 ] && ln -sf "/tmp/resolv.conf.d/resolv.conf.auto" /tmp/resolv.conf
1230
1231         rm -f ${BASEDHCPSTAMPFILE}.${cfg}.*.dhcp
1232 }
1233
1234 add_interface_trigger()
1235 {
1236         local interface ignore
1237
1238         config_get interface "$1" interface
1239         config_get_bool ignore "$1" ignore 0
1240
1241         [ -n "$interface" ] && [ $ignore -eq 0 ] && procd_add_interface_trigger "interface.*" "$interface" /etc/init.d/dnsmasq reload
1242 }
1243
1244 service_triggers()
1245 {
1246         procd_add_reload_trigger "dhcp" "system"
1247
1248         config_load dhcp
1249         config_foreach add_interface_trigger dhcp
1250         config_foreach add_interface_trigger relay
1251 }
1252
1253 boot()
1254 {
1255         BOOT=1
1256         start "$@"
1257 }
1258
1259 start_service() {
1260         local instance="$1"
1261         local instance_found=0
1262         local first_instance=""
1263
1264         . /lib/functions/network.sh
1265
1266         config_cb() {
1267                 local type="$1"
1268                 local name="$2"
1269                 if [ "$type" = "dnsmasq" ]; then
1270                         if [ -n "$instance" ] && [ "$instance" = "$name" ]; then
1271                                 instance_found=1
1272                         fi
1273                         if [ -z "$DEFAULT_INSTANCE" ]; then
1274                                 local disabled
1275                                 config_get_bool disabled "$name" disabled 0
1276                                 if [ "$disabled" -eq 0 ]; then
1277                                         # First enabled section will be assigned default instance name.
1278                                         # Unnamed sections get precedence over named sections.
1279                                         if expr "$cfg" : 'cfg[0-9a-f]*$' >/dev/null = "9"; then # See uci_fixup_section.
1280                                                 DEFAULT_INSTANCE="$name" # Unnamed config section.
1281                                         elif [ -z "$first_instance" ]; then
1282                                                 first_instance="$name"
1283                                         fi
1284                                 fi
1285                         fi
1286                 fi
1287         }
1288
1289         DEFAULT_INSTANCE=""
1290         config_load dhcp
1291         if [ -z "$DEFAULT_INSTANCE" ]; then
1292                 DEFAULT_INSTANCE="$first_instance" # No unnamed config section was found.
1293         fi
1294
1295         if [ -n "$instance" ]; then
1296                 [ "$instance_found" -gt 0 ] || return
1297                 dnsmasq_start "$instance"
1298         else
1299                 config_foreach dnsmasq_start dnsmasq
1300         fi
1301 }
1302
1303 reload_service() {
1304         rc_procd start_service "$@"
1305         procd_send_signal dnsmasq "$@"
1306 }
1307
1308 stop_service() {
1309         local instance="$1"
1310         local instance_found=0
1311
1312         config_cb() {
1313                 local type="$1"
1314                 local name="$2"
1315                 if [ "$type" = "dnsmasq" ]; then
1316                         if [ -n "$instance" ] && [ "$instance" = "$name" ]; then
1317                                 instance_found=1
1318                         fi
1319                 fi
1320         }
1321
1322         config_load dhcp
1323
1324         if [ -n "$instance" ]; then
1325                 [ "$instance_found" -gt 0 ] || return
1326                 dnsmasq_stop "$instance"
1327         else
1328                 config_foreach dnsmasq_stop dnsmasq
1329         fi
1330 }