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