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

   1 #!/bin/sh /etc/rc.common
   2 # Copyright (C) 2007-2012 OpenWrt.org
   3
   4 START=19
   5
   6 USE_PROCD=1
   7 PROG=/usr/sbin/dnsmasq
   8
   9 ADD_LOCAL_DOMAIN=1
  10 ADD_LOCAL_HOSTNAME=1
  11 ADD_WAN_FQDN=0
  12 ADD_LOCAL_FQDN=""
  13
  14 BASECONFIGFILE="/var/etc/dnsmasq.conf"
  15 BASEHOSTFILE="/tmp/hosts/dhcp"
  16 TRUSTANCHORSFILE="/usr/share/dnsmasq/trust-anchors.conf"
  17 TIMEVALIDFILE="/var/state/dnsmasqsec"
  18 BASEDHCPSTAMPFILE="/var/run/dnsmasq"
  19 DHCPBOGUSHOSTNAMEFILE="/usr/share/dnsmasq/dhcpbogushostname.conf"
  20 RFC6761FILE="/usr/share/dnsmasq/rfc6761.conf"
  21 DHCPSCRIPT="/usr/lib/dnsmasq/dhcp-script.sh"
  22 DHCPSCRIPT_DEPENDS="/usr/share/libubox/jshn.sh /usr/bin/jshn /bin/ubus"
  23
  24 DNSMASQ_DHCP_VER=4
  25
  26 dnsmasq_ignore_opt() {
  27         local opt="$1"
  28
  29         if [ -z "$dnsmasq_features" ]; then
  30                 dnsmasq_features="$(dnsmasq --version | grep -m1 'Compile time options:' | cut -d: -f2) "
  31                 [ "${dnsmasq_features#* DHCP }" = "$dnsmasq_features" ] || dnsmasq_has_dhcp=1
  32                 [ "${dnsmasq_features#* DHCPv6 }" = "$dnsmasq_features" ] || dnsmasq_has_dhcp6=1
  33                 [ "${dnsmasq_features#* DNSSEC }" = "$dnsmasq_features" ] || dnsmasq_has_dnssec=1
  34                 [ "${dnsmasq_features#* TFTP }" = "$dnsmasq_features" ] || dnsmasq_has_tftp=1
  35                 [ "${dnsmasq_features#* ipset }" = "$dnsmasq_features" ] || dnsmasq_has_ipset=1
  36         fi
  37
  38         case "$opt" in
  39                 dhcp-duid|\
  40                 ra-param)
  41                         [ -z "$dnsmasq_has_dhcp6" ] ;;
  42                 dhcp-*|\
  43                 bootp-*|\
  44                 pxe-*)
  45                         [ -z "$dnsmasq_has_dhcp" ] ;;
  46                 dnssec*|\
  47                 trust-anchor)
  48                         if [ -z "$dnsmasq_has_dnssec" ]; then
  49                                 echo "dnsmasq: \"$opt\" requested, but dnssec support is not available" >&2
  50                                 exit 1
  51                         fi
  52                         return 1
  53                         ;;
  54                 tftp-*)
  55                         [ -z "$dnsmasq_has_tftp" ] ;;
  56                 ipset)
  57                         [ -z "$dnsmasq_has_ipset" ] ;;
  58                 *)
  59                         return 1
  60         esac
  61 }
  62
  63 xappend() {
  64         local value="${1#--}"
  65         local opt="${value%%=*}"
  66
  67         if ! dnsmasq_ignore_opt "$opt"; then
  68                 echo "$value" >>$CONFIGFILE_TMP
  69         fi
  70 }
  71
  72 hex_to_hostid() {
  73         local var="$1"
  74         local hex="${2#0x}" # strip optional "0x" prefix
  75
  76         if [ -n "${hex//[0-9a-fA-F]/}" ]; then
  77                 # is invalid hex literal
  78                 return 1
  79         fi
  80
  81         # convert into host id
  82         export "$var=$(
  83                 printf "%0x:%0x" \
  84                 $(((0x$hex >> 16) % 65536)) \
  85                 $(( 0x$hex        % 65536))
  86                 )"
  87
  88         return 0
  89 }
  90
  91 dhcp_calc() {
  92         local ip="$1"
  93         local res=0
  94
  95         while [ -n "$ip" ]; do
  96                 part="${ip%%.*}"
  97                 res="$(($res * 256))"
  98                 res="$(($res + $part))"
  99                 [ "${ip%.*}" != "$ip" ] && ip="${ip#*.}" || ip=
 100         done
 101         echo "$res"
 102 }
 103
 104 dhcp_check() {
 105         local ifname="$1"
 106         local stamp="${BASEDHCPSTAMPFILE_CFG}.${ifname}.dhcp"
 107         local rv=0
 108
 109         [ -s "$stamp" ] && return $(cat "$stamp")
 110
 111         # If interface is down, skip it.
 112         # The init script will be called again once the link is up
 113         case "$(devstatus "$ifname" | jsonfilter -e @.up)" in
 114                 false) return 1;;
 115         esac
 116
 117         udhcpc -n -q -s /bin/true -t 1 -i "$ifname" >&- && rv=1 || rv=0
 118
 119         echo $rv > "$stamp"
 120         return $rv
 121 }
 122
 123 log_once() {
 124         pidof dnsmasq >/dev/null || \
 125                 logger -t dnsmasq "$@"
 126 }
 127
 128 has_handler() {
 129         local file
 130
 131         for file in /etc/hotplug.d/dhcp/* /etc/hotplug.d/tftp/* /etc/hotplug.d/neigh/*; do
 132                 [ -f "$file" ] && return 0
 133         done
 134
 135         return 1
 136 }
 137
 138 append_bool() {
 139         local section="$1"
 140         local option="$2"
 141         local value="$3"
 142         local default="$4"
 143         local _loctmp
 144         [ -z "$default" ] && default="0"
 145         config_get_bool _loctmp "$section" "$option" "$default"
 146         [ $_loctmp -gt 0 ] && xappend "$value"
 147 }
 148
 149 append_parm() {
 150         local section="$1"
 151         local option="$2"
 152         local switch="$3"
 153         local default="$4"
 154         local _loctmp
 155         config_get _loctmp "$section" "$option" "$default"
 156         [ -z "$_loctmp" ] && return 0
 157         xappend "$switch=$_loctmp"
 158 }
 159
 160 append_server() {
 161         xappend "--server=$1"
 162 }
 163
 164 append_rev_server() {
 165         xappend "--rev-server=$1"
 166 }
 167
 168 append_address() {
 169         xappend "--address=$1"
 170 }
 171
 172 append_ipset() {
 173         xappend "--ipset=$1"
 174 }
 175
 176 append_connmark_allowlist() {
 177         xappend "--connmark-allowlist=$1"
 178 }
 179
 180 append_interface() {
 181         network_get_device ifname "$1" || ifname="$1"
 182         xappend "--interface=$ifname"
 183 }
 184
 185 append_listenaddress() {
 186         xappend "--listen-address=$1"
 187 }
 188
 189 append_notinterface() {
 190         network_get_device ifname "$1" || ifname="$1"
 191         xappend "--except-interface=$ifname"
 192 }
 193
 194 ismounted() {
 195         local filename="$1"
 196         local dirname
 197         for dirname in $EXTRA_MOUNT ; do
 198                 case "$filename" in
 199                         "${dirname}/"* | "${dirname}" )
 200                                 return 0
 201                                 ;;
 202                 esac
 203         done
 204
 205         return 1
 206 }
 207
 208 append_addnhosts() {
 209         ismounted "$1" || append EXTRA_MOUNT "$1"
 210         xappend "--addn-hosts=$1"
 211 }
 212
 213 append_bogusnxdomain() {
 214         xappend "--bogus-nxdomain=$1"
 215 }
 216
 217 append_pxe_service() {
 218         xappend "--pxe-service=$1"
 219 }
 220
 221 append_interface_name() {
 222         xappend "--interface-name=$1,$2"
 223 }
 224
 225 filter_dnsmasq() {
 226         local cfg="$1" func="$2" match_cfg="$3" found_cfg
 227
 228         # use entry when no instance entry set, or if it matches
 229         config_get found_cfg "$cfg" "instance"
 230         if [ -z "$found_cfg" ] || [ "$found_cfg" = "$match_cfg" ]; then
 231                 $func $cfg
 232         fi
 233 }
 234
 235 dhcp_subscrid_add() {
 236         local cfg="$1"
 237
 238         config_get networkid "$cfg" networkid
 239         [ -n "$networkid" ] || return 0
 240
 241         config_get subscriberid "$cfg" subscriberid
 242         [ -n "$subscriberid" ] || return 0
 243
 244         xappend "--dhcp-subscrid=set:$networkid,$subscriberid"
 245
 246         config_get_bool force "$cfg" force 0
 247
 248         dhcp_option_add "$cfg" "$networkid" "$force"
 249 }
 250
 251 dhcp_remoteid_add() {
 252         local cfg="$1"
 253
 254         config_get networkid "$cfg" networkid
 255         [ -n "$networkid" ] || return 0
 256
 257         config_get remoteid "$cfg" remoteid
 258         [ -n "$remoteid" ] || return 0
 259
 260         xappend "--dhcp-remoteid=set:$networkid,$remoteid"
 261
 262         config_get_bool force "$cfg" force 0
 263
 264         dhcp_option_add "$cfg" "$networkid" "$force"
 265 }
 266
 267 dhcp_circuitid_add() {
 268         # TODO: DHCPV6 does not have circuitid; catch "option6:"
 269         local cfg="$1"
 270
 271         config_get networkid "$cfg" networkid
 272         [ -n "$networkid" ] || return 0
 273
 274         config_get circuitid "$cfg" circuitid
 275         [ -n "$circuitid" ] || return 0
 276
 277         xappend "--dhcp-circuitid=set:$networkid,$circuitid"
 278
 279         config_get_bool force "$cfg" force 0
 280
 281         dhcp_option_add "$cfg" "$networkid" "$force"
 282 }
 283
 284 dhcp_userclass_add() {
 285         local cfg="$1"
 286
 287         config_get networkid "$cfg" networkid
 288         [ -n "$networkid" ] || return 0
 289
 290         config_get userclass "$cfg" userclass
 291         [ -n "$userclass" ] || return 0
 292
 293         xappend "--dhcp-userclass=set:$networkid,$userclass"
 294
 295         config_get_bool force "$cfg" force 0
 296
 297         dhcp_option_add "$cfg" "$networkid" "$force"
 298 }
 299
 300 dhcp_vendorclass_add() {
 301         # TODO: DHCPV6 vendor class has stricter definitions; catch? fixup?
 302         local cfg="$1"
 303
 304         config_get networkid "$cfg" networkid
 305         [ -n "$networkid" ] || return 0
 306
 307         config_get vendorclass "$cfg" vendorclass
 308         [ -n "$vendorclass" ] || return 0
 309
 310         xappend "--dhcp-vendorclass=set:$networkid,$vendorclass"
 311
 312         config_get_bool force "$cfg" force 0
 313
 314         dhcp_option_add "$cfg" "$networkid" "$force"
 315 }
 316
 317 dhcp_match_add() {
 318         local cfg="$1"
 319
 320         config_get networkid "$cfg" networkid
 321         [ -n "$networkid" ] || return 0
 322
 323         config_get match "$cfg" match
 324         [ -n "$match" ] || return 0
 325
 326         xappend "--dhcp-match=set:$networkid,$match"
 327
 328         config_get_bool force "$cfg" force 0
 329
 330         dhcp_option_add "$cfg" "$networkid" "$force"
 331 }
 332
 333 dhcp_host_add() {
 334         local cfg="$1"
 335         local hosttag nametime addrs duids macs tags mtags
 336
 337         config_get_bool force "$cfg" force 0
 338
 339         config_get networkid "$cfg" networkid
 340         [ -n "$networkid" ] && dhcp_option_add "$cfg" "$networkid" "$force"
 341
 342         config_get_bool enable "$cfg" enable 1
 343         [ "$enable" = "0" ] && return 0
 344
 345         config_get name "$cfg" name
 346         config_get ip "$cfg" ip
 347         config_get hostid "$cfg" hostid
 348
 349         [ -z "$ip" ] && [ -z "$name" ] && [ -z "$hostid" ] && return 0
 350
 351         config_get_bool dns "$cfg" dns 0
 352         [ "$dns" = "1" ] && [ -n "$ip" ] && [ -n "$name" ] && {
 353                 echo "$ip $name${DOMAIN:+.$DOMAIN}" >> $HOSTFILE_TMP
 354         }
 355
 356         config_get mac "$cfg" mac
 357         config_get duid "$cfg" duid
 358         config_get tag "$cfg" tag
 359
 360         add_tag() {
 361                 mtags="${mtags}tag:$1,"
 362         }
 363         config_list_foreach "$cfg" match_tag add_tag
 364
 365         if [ -n "$mac" ]; then
 366                 # --dhcp-host=00:20:e0:3b:13:af,192.168.0.199,lap
 367                 # many MAC are possible to track a laptop ON/OFF dock
 368                 for m in $mac; do append macs "$m" ","; done
 369         fi
 370
 371         if [ $DNSMASQ_DHCP_VER -eq 6 ] && [ -n "$duid" ]; then
 372                 # --dhcp-host=id:00:03:00:01:12:00:00:01:02:03,[::beef],lap
 373                 # one (virtual) machine gets one DUID per RFC3315
 374                 duids="id:${duid// */}"
 375         fi
 376
 377         if [ -z "$macs" ] && [ -z "$duids" ]; then
 378                 # --dhcp-host=lap,192.168.0.199,[::beef]
 379                 [ -n "$name" ] || return 0
 380                 macs="$name"
 381                 name=""
 382         fi
 383
 384         if [ -n "$hostid" ]; then
 385                 hex_to_hostid hostid "$hostid"
 386         fi
 387
 388         if [ -n "$tag" ]; then
 389                 for t in $tag; do append tags "$t" ",set:"; done
 390         fi
 391
 392         config_get_bool broadcast "$cfg" broadcast 0
 393         config_get leasetime "$cfg" leasetime
 394
 395         [ "$broadcast" = "0" ] && broadcast= || broadcast=",set:needs-broadcast"
 396
 397         hosttag="${networkid:+,set:${networkid}}${tags:+,set:${tags}}$broadcast"
 398         nametime="${name:+,$name}${leasetime:+,$leasetime}"
 399
 400         if [ $DNSMASQ_DHCP_VER -eq 6 ]; then
 401                 addrs="${ip:+,$ip}${hostid:+,[::$hostid]}"
 402                 xappend "--dhcp-host=$mtags$macs${duids:+,$duids}$hosttag$addrs$nametime"
 403         else
 404                 xappend "--dhcp-host=$mtags$macs$hosttag${ip:+,$ip}$nametime"
 405         fi
 406 }
 407
 408 dhcp_this_host_add() {
 409         local net="$1"
 410         local ifname="$2"
 411         local mode="$3"
 412         local routerstub routername ifdashname
 413         local lanaddr lanaddr6 lanaddrs6 ulaprefix
 414
 415         if [ "$mode" -gt 0 ] ; then
 416                 ifdashname="${ifname//./-}"
 417                 routerstub="$( md5sum /etc/os-release )"
 418                 routerstub="router-${routerstub// */}"
 419                 routername="$( uci_get system @system[0] hostname $routerstub )"
 420
 421                 if [ "$mode" -gt 1 ] ; then
 422                         if [ "$mode" -gt 2 ] ; then
 423                                 if [ "$mode" -gt 3 ] ; then
 424                                         append_interface_name "$ifdashname.$routername.$DOMAIN" "$ifname"
 425                                 fi
 426
 427                                 append_interface_name "$routername.$DOMAIN" "$ifname"
 428                         fi
 429
 430                         # All IP addresses discovered by dnsmasq will be labeled (except fe80::)
 431                         append_interface_name "$routername" "$ifname"
 432
 433                 else
 434                         # This uses a static host file entry for only limited addresses.
 435                         # Use dnsmasq option "--expandhosts" to enable FQDN on host files.
 436                         ulaprefix="$(uci_get network @globals[0] ula_prefix)"
 437                         network_get_ipaddr lanaddr "$net"
 438                         network_get_ipaddrs6 lanaddrs6 "$net"
 439
 440                         if [ -n "$lanaddr" ] ; then
 441                                 dhcp_domain_add "" "$routername" "$lanaddr"
 442                         fi
 443
 444                         if [ -n "$ulaprefix" ] && [ -n "$lanaddrs6" ] ; then
 445                                 for lanaddr6 in $lanaddrs6 ; do
 446                                         case "$lanaddr6" in
 447                                         "${ulaprefix%%:/*}"*)
 448                                                 dhcp_domain_add "" "$routername" "$lanaddr6"
 449                                                 ;;
 450                                         esac
 451                                 done
 452                         fi
 453                 fi
 454         fi
 455 }
 456
 457 dhcp_tag_add() {
 458         # NOTE: dnsmasq has explicit "option6:" prefix for DHCPv6 so no collisions
 459         local cfg="$1"
 460
 461         tag="$cfg"
 462
 463         [ -n "$tag" ] || return 0
 464
 465         config_get_bool force "$cfg" force 0
 466         [ "$force" = "0" ] && force=
 467
 468         config_get option "$cfg" dhcp_option
 469         for o in $option; do
 470                 xappend "--dhcp-option${force:+-force}=tag:$tag,$o"
 471         done
 472 }
 473
 474 dhcp_mac_add() {
 475         local cfg="$1"
 476
 477         config_get networkid "$cfg" networkid
 478         [ -n "$networkid" ] || return 0
 479
 480         config_get mac "$cfg" mac
 481         [ -n "$mac" ] || return 0
 482
 483         xappend "--dhcp-mac=$networkid,$mac"
 484
 485         dhcp_option_add "$cfg" "$networkid"
 486 }
 487
 488 dhcp_boot_add() {
 489         # TODO: BOOTURL is different between DHCPv4 and DHCPv6
 490         local cfg="$1"
 491
 492         config_get networkid "$cfg" networkid
 493
 494         config_get filename "$cfg" filename
 495         [ -n "$filename" ] || return 0
 496
 497         config_get servername "$cfg" servername
 498         config_get serveraddress "$cfg" serveraddress
 499
 500         [ -n "$serveraddress" ] && [ ! -n "$servername" ] && return 0
 501
 502         xappend "--dhcp-boot=${networkid:+net:$networkid,}${filename}${servername:+,$servername}${serveraddress:+,$serveraddress}"
 503
 504         config_get_bool force "$cfg" force 0
 505
 506         dhcp_option_add "$cfg" "$networkid" "$force"
 507 }
 508
 509
 510 dhcp_add() {
 511         local cfg="$1"
 512         local dhcp6range="::"
 513         local nettag
 514         local tags
 515
 516         config_get net "$cfg" interface
 517         [ -n "$net" ] || return 0
 518
 519         config_get networkid "$cfg" networkid
 520         [ -n "$networkid" ] || networkid="$net"
 521
 522         network_get_device ifname "$net" || return 0
 523
 524         [ "$cachelocal" = "0" ] && network_get_dnsserver dnsserver "$net" && {
 525                 DNS_SERVERS="$DNS_SERVERS $dnsserver"
 526         }
 527
 528         append_bool "$cfg" ignore "--no-dhcp-interface=$ifname" && {
 529                 # Many ISP do not have useful names for DHCP customers (your WAN).
 530                 dhcp_this_host_add "$net" "$ifname" "$ADD_WAN_FQDN"
 531                 return 0
 532         }
 533
 534         network_get_subnet subnet "$net" || return 0
 535         network_get_protocol proto "$net" || return 0
 536
 537         # Do not support non-static interfaces for now
 538         [ static = "$proto" ] || return 0
 539
 540         # Override interface netmask with dhcp config if applicable
 541         config_get netmask "$cfg" netmask "${subnet##*/}"
 542
 543         #check for an already active dhcp server on the interface, unless 'force' is set
 544         config_get_bool force "$cfg" force 0
 545         [ $force -gt 0 ] || dhcp_check "$ifname" || {
 546                 logger -t dnsmasq \
 547                         "found already running DHCP-server on interface '$ifname'" \
 548                         "refusing to start, use 'option force 1' to override"
 549                 return 0
 550         }
 551
 552         config_get start "$cfg" start 100
 553         config_get limit "$cfg" limit 150
 554         config_get leasetime "$cfg" leasetime 12h
 555         config_get options "$cfg" options
 556         config_get_bool dynamicdhcp "$cfg" dynamicdhcp 1
 557
 558         config_get dhcpv4 "$cfg" dhcpv4
 559         config_get dhcpv6 "$cfg" dhcpv6
 560
 561         config_get ra "$cfg" ra
 562         config_get ra_management "$cfg" ra_management
 563         config_get ra_preference "$cfg" ra_preference
 564         config_get dns "$cfg" dns
 565
 566         config_list_foreach "$cfg" "interface_name" append_interface_name "$ifname"
 567
 568         # Put the router host name on this DHCP served interface address(es)
 569         dhcp_this_host_add "$net" "$ifname" "$ADD_LOCAL_FQDN"
 570
 571         start="$( dhcp_calc "$start" )"
 572
 573         add_tag() {
 574                 tags="${tags}tag:$1,"
 575         }
 576         config_list_foreach "$cfg" tag add_tag
 577
 578         nettag="${networkid:+set:${networkid},}"
 579
 580         if [ "$limit" -gt 0 ] ; then
 581                 limit=$((limit-1))
 582         fi
 583
 584         eval "$(ipcalc.sh "${subnet%%/*}" $netmask $start $limit)"
 585
 586         if [ "$dynamicdhcp" = "0" ] ; then
 587                 END="static"
 588                 dhcp6range="::,static"
 589         else
 590                 dhcp6range="::1000,::ffff"
 591         fi
 592
 593
 594         if [ "$dhcpv4" != "disabled" ] ; then
 595                 xappend "--dhcp-range=$tags$nettag$START,$END,$NETMASK,$leasetime${options:+ $options}"
 596         fi
 597
 598
 599         if [ $DNSMASQ_DHCP_VER -eq 6 ] && [ "$ra" = "server" ] ; then
 600                 # Note: dnsmasq cannot just be a DHCPv6 server (all-in-1)
 601                 # and let some other machine(s) send RA pointing to it.
 602
 603                 case $ra_preference in
 604                 *high*)
 605                         xappend "--ra-param=$ifname,high,0,7200"
 606                         ;;
 607                 *low*)
 608                         xappend "--ra-param=$ifname,low,0,7200"
 609                         ;;
 610                 *)
 611                         # Send UNSOLICITED RA at default interval and live for 2 hours.
 612                         # TODO: convert flexible lease time into route life time (only seconds).
 613                         xappend "--ra-param=$ifname,0,7200"
 614                         ;;
 615                 esac
 616
 617                 if [ "$dhcpv6" = "disabled" ] ; then
 618                         ra_management="3"
 619                 fi
 620
 621
 622                 case $ra_management in
 623                 0)
 624                         # SLACC with DCHP for extended options
 625                         xappend "--dhcp-range=$nettag::,constructor:$ifname,ra-stateless,ra-names"
 626                         ;;
 627                 2)
 628                         # DHCP address and RA only for management redirection
 629                         xappend "--dhcp-range=$nettag$dhcp6range,constructor:$ifname,$leasetime"
 630                         ;;
 631                 3)
 632                         # SLAAC only but dnsmasq attempts to link HOSTNAME, DHCPv4 MAC, and SLAAC
 633                         xappend "--dhcp-range=$nettag::,constructor:$ifname,ra-only,ra-names"
 634                         ;;
 635                 *)
 636                         # SLAAC and full DHCP
 637                         xappend "--dhcp-range=$nettag$dhcp6range,constructor:$ifname,slaac,ra-names,$leasetime"
 638                         ;;
 639                 esac
 640
 641                 if [ -n "$dns" ]; then
 642                         dnss=""
 643                         for d in $dns; do append dnss "[$d]" ","; done
 644                 else
 645                         dnss="[::]"
 646                 fi
 647
 648                 dhcp_option_append "option6:dns-server,$dnss" "$networkid"
 649         fi
 650
 651         dhcp_option_add "$cfg" "$networkid" 0
 652         dhcp_option_add "$cfg" "$networkid" 2
 653 }
 654
 655 dhcp_option_append() {
 656         local option="$1"
 657         local networkid="$2"
 658         local force="$3"
 659
 660         xappend "--dhcp-option${force:+-force}=${networkid:+$networkid,}$option"
 661 }
 662
 663 dhcp_option_add() {
 664         # NOTE: dnsmasq has explicit "option6:" prefix for DHCPv6 so no collisions
 665         local cfg="$1"
 666         local networkid="$2"
 667         local force="$3"
 668         local opt="dhcp_option"
 669
 670         [ "$force" = "0" ] && force=
 671         [ "$force" = "2" ] && opt="dhcp_option_force"
 672
 673         local list_len
 674         config_get list_len "$cfg" "${opt}_LENGTH"
 675
 676         if [ -n "$list_len" ]; then
 677                 config_list_foreach "$cfg" "$opt" dhcp_option_append "$networkid" "$force"
 678         else
 679                 config_get dhcp_option "$cfg" "$opt"
 680
 681                 [ -n "$dhcp_option" ] && echo "Warning: the 'option $opt' syntax is deprecated, use 'list $opt'" >&2
 682
 683                 local option
 684                 for option in $dhcp_option; do
 685                         dhcp_option_append "$option" "$networkid" "$force"
 686                 done
 687         fi
 688 }
 689
 690 dhcp_domain_add() {
 691         local cfg="$1"
 692         local ip name names record
 693
 694         config_get names "$cfg" name "$2"
 695         [ -n "$names" ] || return 0
 696
 697         config_get ip "$cfg" ip "$3"
 698         [ -n "$ip" ] || return 0
 699
 700         for name in $names; do
 701                 record="${record:+$record }$name"
 702         done
 703
 704         echo "$ip $record" >> $HOSTFILE_TMP
 705 }
 706
 707 dhcp_srv_add() {
 708         local cfg="$1"
 709
 710         config_get srv "$cfg" srv
 711         [ -n "$srv" ] || return 0
 712
 713         config_get target "$cfg" target
 714         [ -n "$target" ] || return 0
 715
 716         config_get port "$cfg" port
 717         [ -n "$port" ] || return 0
 718
 719         config_get class "$cfg" class
 720         config_get weight "$cfg" weight
 721
 722         local service="$srv,$target,$port${class:+,$class${weight:+,$weight}}"
 723
 724         xappend "--srv-host=$service"
 725 }
 726
 727 dhcp_mx_add() {
 728         local cfg="$1"
 729         local domain relay pref
 730
 731         config_get domain "$cfg" domain
 732         [ -n "$domain" ] || return 0
 733
 734         config_get relay "$cfg" relay
 735         [ -n "$relay" ] || return 0
 736
 737         config_get pref "$cfg" pref 0
 738
 739         local service="$domain,$relay,$pref"
 740
 741         xappend "--mx-host=$service"
 742 }
 743
 744 dhcp_cname_add() {
 745         local cfg="$1"
 746         local cname target
 747
 748         config_get cname "$cfg" cname
 749         [ -n "$cname" ] || return 0
 750
 751         config_get target "$cfg" target
 752         [ -n "$target" ] || return 0
 753
 754         xappend "--cname=${cname},${target}"
 755 }
 756
 757 dhcp_hostrecord_add() {
 758         local cfg="$1"
 759         local names addresses record val
 760
 761         config_get names "$cfg" name "$2"
 762         if [ -z "$names" ]; then
 763                 return 0
 764         fi
 765
 766         config_get addresses "$cfg" ip "$3"
 767         if [ -z "$addresses" ]; then
 768                 return 0
 769         fi
 770
 771         for val in $names $addresses; do
 772                 record="${record:+$record,}$val"
 773         done
 774
 775         xappend "--host-record=$record"
 776 }
 777
 778 dhcp_relay_add() {
 779         local cfg="$1"
 780         local local_addr server_addr interface
 781
 782         config_get local_addr "$cfg" local_addr
 783         [ -n "$local_addr" ] || return 0
 784
 785         config_get server_addr "$cfg" server_addr
 786         [ -n "$server_addr" ] || return 0
 787
 788         config_get interface "$cfg" interface
 789         if [ -z "$interface" ]; then
 790                 xappend "--dhcp-relay=$local_addr,$server_addr"
 791         else
 792                 network_get_device ifname "$interface" || return
 793                 xappend "--dhcp-relay=$local_addr,$server_addr,$ifname"
 794         fi
 795 }
 796
 797 dnsmasq_ipset_add() {
 798         local cfg="$1"
 799         local ipsets domains
 800
 801         add_ipset() {
 802                 ipsets="${ipsets:+$ipsets,}$1"
 803         }
 804
 805         add_domain() {
 806                 # leading '/' is expected
 807                 domains="$domains/$1"
 808         }
 809
 810         config_list_foreach "$cfg" "name" add_ipset
 811         config_list_foreach "$cfg" "domain" add_domain
 812
 813         if [ -z "$ipsets" ] || [ -z "$domains" ]; then
 814                 return 0
 815         fi
 816
 817         xappend "--ipset=$domains/$ipsets"
 818 }
 819
 820 dnsmasq_start()
 821 {
 822         local cfg="$1"
 823         local disabled user_dhcpscript logfacility
 824         local resolvfile resolvdir localuse=0
 825
 826         config_get_bool disabled "$cfg" disabled 0
 827         [ "$disabled" -gt 0 ] && return 0
 828
 829         # reset list of DOMAINS, DNS servers and EXTRA mounts (for each dnsmasq instance)
 830         DNS_SERVERS=""
 831         DOMAIN=""
 832         EXTRA_MOUNT=""
 833         CONFIGFILE="${BASECONFIGFILE}.${cfg}"
 834         CONFIGFILE_TMP="${CONFIGFILE}.$$"
 835         HOSTFILE="${BASEHOSTFILE}.${cfg}"
 836         HOSTFILE_TMP="${HOSTFILE}.$$"
 837         HOSTFILE_DIR="$(dirname "$HOSTFILE")"
 838         BASEDHCPSTAMPFILE_CFG="${BASEDHCPSTAMPFILE}.${cfg}"
 839
 840         # before we can call xappend
 841         umask u=rwx,g=rx,o=rx
 842         mkdir -p /var/run/dnsmasq/
 843         mkdir -p $(dirname $CONFIGFILE)
 844         mkdir -p "$HOSTFILE_DIR"
 845         mkdir -p /var/lib/misc
 846         chown dnsmasq:dnsmasq /var/run/dnsmasq
 847
 848         echo "# auto-generated config file from /etc/config/dhcp" > $CONFIGFILE_TMP
 849         echo "# auto-generated config file from /etc/config/dhcp" > $HOSTFILE_TMP
 850
 851         local dnsmasqconffile="/etc/dnsmasq.${cfg}.conf"
 852         if [ ! -r "$dnsmasqconffile" ]; then
 853                 dnsmasqconffile=/etc/dnsmasq.conf
 854         fi
 855
 856         # if we did this last, we could override auto-generated config
 857         [ -f "${dnsmasqconffile}" ] && {
 858                 xappend "--conf-file=${dnsmasqconffile}"
 859         }
 860
 861         $PROG --version | grep -osqE "^Compile time options:.* DHCPv6( |$)" && DHCPv6CAPABLE=1 || DHCPv6CAPABLE=0
 862
 863
 864         if [ -x /usr/sbin/odhcpd ] && [ -x /etc/init.d/odhcpd ] ; then
 865                 local odhcpd_is_main odhcpd_is_enabled
 866                 config_get odhcpd_is_main odhcpd maindhcp 0
 867                 /etc/init.d/odhcpd enabled && odhcpd_is_enabled=1 || odhcpd_is_enabled=0
 868
 869
 870                 if [ "$odhcpd_is_enabled" -eq 0 ] && [ "$DHCPv6CAPABLE" -eq 1 ] ; then
 871                         # DHCP V4 and V6 in DNSMASQ
 872                         DNSMASQ_DHCP_VER=6
 873                 elif [ "$odhcpd_is_main" -gt 0 ] ; then
 874                         # ODHCPD is doing it all
 875                         DNSMASQ_DHCP_VER=0
 876                 else
 877                         # You have ODHCPD but use DNSMASQ for DHCPV4
 878                         DNSMASQ_DHCP_VER=4
 879                 fi
 880
 881         elif [ "$DHCPv6CAPABLE" -eq 1 ] ; then
 882                 # DHCP V4 and V6 in DNSMASQ
 883                 DNSMASQ_DHCP_VER=6
 884         else
 885                 DNSMASQ_DHCP_VER=4
 886         fi
 887
 888         # Allow DHCP/DHCPv6 to be handled by ISC DHCPD
 889         if [ -x /usr/sbin/dhcpd ] ; then
 890                 if [ -x /etc/init.d/dhcpd ] ; then
 891                         /etc/init.d/dhcpd enabled && DNSMASQ_DHCP_VER=0
 892                 fi
 893                 if [ -x /etc/init.d/dhcpd6 ] && [ "$DNSMASQ_DHCP_VER" -gt 0 ] ; then
 894                         /etc/init.d/dhcpd6 enabled && DNSMASQ_DHCP_VER=4
 895                 fi
 896         fi
 897
 898         append_bool "$cfg" authoritative "--dhcp-authoritative"
 899         append_bool "$cfg" nodaemon "--no-daemon"
 900         append_bool "$cfg" domainneeded "--domain-needed"
 901         append_bool "$cfg" filterwin2k "--filterwin2k"
 902         append_bool "$cfg" nohosts "--no-hosts"
 903         append_bool "$cfg" nonegcache "--no-negcache"
 904         append_bool "$cfg" strictorder "--strict-order"
 905         append_bool "$cfg" logqueries "--log-queries=extra"
 906         append_bool "$cfg" noresolv "--no-resolv"
 907         append_bool "$cfg" localise_queries "--localise-queries"
 908         append_bool "$cfg" readethers "--read-ethers"
 909
 910         local instance_name="dnsmasq.$cfg"
 911         if [ "$cfg" = "$DEFAULT_INSTANCE" ]; then
 912                 instance_name="dnsmasq"
 913         fi
 914         config_get_bool dbus "$cfg" "dbus" 0
 915         [ $dbus -gt 0 ] && xappend "--enable-dbus=uk.org.thekelleys.$instance_name"
 916         config_get_bool ubus "$cfg" "ubus" 1
 917         [ $ubus -gt 0 ] && xappend "--enable-ubus=$instance_name"
 918
 919         append_bool "$cfg" expandhosts "--expand-hosts"
 920         config_get tftp_root "$cfg" "tftp_root"
 921         [ -n "$tftp_root" ] && mkdir -p "$tftp_root" && append_bool "$cfg" enable_tftp "--enable-tftp"
 922         append_bool "$cfg" tftp_no_fail "--tftp-no-fail"
 923         append_bool "$cfg" nonwildcard "--bind-dynamic" 1
 924         append_bool "$cfg" fqdn "--dhcp-fqdn"
 925         append_bool "$cfg" proxydnssec "--proxy-dnssec"
 926         append_bool "$cfg" localservice "--local-service"
 927         append_bool "$cfg" logdhcp "--log-dhcp"
 928         append_bool "$cfg" quietdhcp "--quiet-dhcp"
 929         append_bool "$cfg" sequential_ip "--dhcp-sequential-ip"
 930         append_bool "$cfg" allservers "--all-servers"
 931         append_bool "$cfg" noping "--no-ping"
 932         append_bool "$cfg" rapidcommit "--dhcp-rapid-commit"
 933         append_bool "$cfg" scriptarp "--script-arp"
 934
 935         append_parm "$cfg" logfacility "--log-facility"
 936         config_get logfacility "$cfg" "logfacility"
 937         append_parm "$cfg" cachesize "--cache-size"
 938         append_parm "$cfg" dnsforwardmax "--dns-forward-max"
 939         append_parm "$cfg" port "--port"
 940         append_parm "$cfg" ednspacket_max "--edns-packet-max"
 941         append_parm "$cfg" dhcpleasemax "--dhcp-lease-max"
 942         append_parm "$cfg" "queryport" "--query-port"
 943         append_parm "$cfg" "minport" "--min-port"
 944         append_parm "$cfg" "maxport" "--max-port"
 945         append_parm "$cfg" "domain" "--domain"
 946         append_parm "$cfg" "local" "--local"
 947         config_list_foreach "$cfg" "listen_address" append_listenaddress
 948         config_list_foreach "$cfg" "server" append_server
 949         config_list_foreach "$cfg" "rev_server" append_rev_server
 950         config_list_foreach "$cfg" "address" append_address
 951         config_list_foreach "$cfg" "ipset" append_ipset
 952
 953         local connmark_allowlist_enable
 954         config_get connmark_allowlist_enable "$cfg" connmark_allowlist_enable 0
 955         [ "$connmark_allowlist_enable" -gt 0 ] && {
 956                 append_parm "$cfg" "connmark_allowlist_enable" "--connmark-allowlist-enable"
 957                 config_list_foreach "$cfg" "connmark_allowlist" append_connmark_allowlist
 958         }
 959
 960         [ -n "$BOOT" ] || {
 961                 config_list_foreach "$cfg" "interface" append_interface
 962                 config_list_foreach "$cfg" "notinterface" append_notinterface
 963         }
 964         config_get_bool ignore_hosts_dir "$cfg" ignore_hosts_dir 0
 965         if [ "$ignore_hosts_dir" = "1" ]; then
 966                 xappend "--addn-hosts=$HOSTFILE"
 967                 append EXTRA_MOUNT "$HOSTFILE"
 968         else
 969                 xappend "--addn-hosts=$HOSTFILE_DIR"
 970                 append EXTRA_MOUNT "$HOSTFILE_DIR"
 971         fi
 972         config_list_foreach "$cfg" "addnhosts" append_addnhosts
 973         config_list_foreach "$cfg" "bogusnxdomain" append_bogusnxdomain
 974         append_parm "$cfg" "leasefile" "--dhcp-leasefile" "/tmp/dhcp.leases"
 975         append_parm "$cfg" "serversfile" "--servers-file"
 976         append_parm "$cfg" "tftp_root" "--tftp-root"
 977         append_parm "$cfg" "dhcp_boot" "--dhcp-boot"
 978         append_parm "$cfg" "local_ttl" "--local-ttl"
 979         append_parm "$cfg" "max_ttl" "--max-ttl"
 980         append_parm "$cfg" "min_cache_ttl" "--min-cache-ttl"
 981         append_parm "$cfg" "max_cache_ttl" "--max-cache-ttl"
 982         append_parm "$cfg" "pxe_prompt" "--pxe-prompt"
 983         append_parm "$cfg" "tftp_unique_root" "--tftp-unique-root"
 984         config_list_foreach "$cfg" "pxe_service" append_pxe_service
 985         config_get DOMAIN "$cfg" domain
 986
 987         config_get_bool ADD_LOCAL_DOMAIN "$cfg" add_local_domain 1
 988         config_get_bool ADD_LOCAL_HOSTNAME "$cfg" add_local_hostname 1
 989         config_get ADD_LOCAL_FQDN "$cfg" add_local_fqdn ""
 990         config_get ADD_WAN_FQDN "$cfg" add_wan_fqdn 0
 991
 992         if [ -z "$ADD_LOCAL_FQDN" ] ; then
 993                 # maintain support for previous UCI
 994                 ADD_LOCAL_FQDN="$ADD_LOCAL_HOSTNAME"
 995         fi
 996
 997         config_get user_dhcpscript $cfg dhcpscript
 998         if has_handler || [ -n "$user_dhcpscript" ]; then
 999                 xappend "--dhcp-script=$DHCPSCRIPT"
1000                 xappend "--script-arp"
1001         fi
1002
1003         config_get leasefile $cfg leasefile "/tmp/dhcp.leases"
1004         [ -n "$leasefile" ] && [ ! -e "$leasefile" ] && touch "$leasefile"
1005         config_get_bool cachelocal "$cfg" cachelocal 1
1006
1007         config_get_bool noresolv "$cfg" noresolv 0
1008         if [ "$noresolv" != "1" ]; then
1009                 config_get resolvfile "$cfg" resolvfile /tmp/resolv.conf.d/resolv.conf.auto
1010                 [ -n "$resolvfile" ] && [ ! -e "$resolvfile" ] && touch "$resolvfile"
1011                 xappend "--resolv-file=$resolvfile"
1012                 [ "$resolvfile" = "/tmp/resolv.conf.d/resolv.conf.auto" ] && localuse=1
1013                 resolvdir="$(dirname "$resolvfile")"
1014         fi
1015         config_get_bool localuse "$cfg" localuse "$localuse"
1016
1017         config_get hostsfile "$cfg" dhcphostsfile
1018         [ -e "$hostsfile" ] && xappend "--dhcp-hostsfile=$hostsfile"
1019
1020         local rebind
1021         config_get_bool rebind "$cfg" rebind_protection 1
1022         [ $rebind -gt 0 ] && {
1023                 log_once \
1024                         "DNS rebinding protection is active," \
1025                         "will discard upstream RFC1918 responses!"
1026                 xappend "--stop-dns-rebind"
1027
1028                 local rebind_localhost
1029                 config_get_bool rebind_localhost "$cfg" rebind_localhost 0
1030                 [ $rebind_localhost -gt 0 ] && {
1031                         log_once "Allowing 127.0.0.0/8 responses"
1032                         xappend "--rebind-localhost-ok"
1033                 }
1034
1035                 append_rebind_domain() {
1036                         log_once "Allowing RFC1918 responses for domain $1"
1037                         xappend "--rebind-domain-ok=$1"
1038                 }
1039
1040                 config_list_foreach "$cfg" rebind_domain append_rebind_domain
1041         }
1042
1043         config_get_bool dnssec "$cfg" dnssec 0
1044         [ "$dnssec" -gt 0 ] && {
1045                 xappend "--conf-file=$TRUSTANCHORSFILE"
1046                 xappend "--dnssec"
1047                 [ -x /etc/init.d/sysntpd ] && {
1048                         if /etc/init.d/sysntpd enabled || [ "$(uci_get system.ntp.enabled)" = "1" ] ; then
1049                                 [ -f "$TIMEVALIDFILE" ] || xappend "--dnssec-no-timecheck"
1050                         fi
1051                 }
1052                 config_get_bool dnsseccheckunsigned "$cfg" dnsseccheckunsigned 1
1053                 [ "$dnsseccheckunsigned" -eq 0 ] && xappend "--dnssec-check-unsigned=no"
1054         }
1055
1056         config_get addmac "$cfg" addmac 0
1057         [ "$addmac" != "0" ] && {
1058                 [ "$addmac" = "1" ] && addmac=
1059                 xappend "--add-mac${addmac:+="$addmac"}"
1060         }
1061
1062         dhcp_option_add "$cfg" "" 0
1063         dhcp_option_add "$cfg" "" 2
1064
1065         xappend "--dhcp-broadcast=tag:needs-broadcast"
1066
1067
1068         config_get dnsmasqconfdir "$cfg" confdir "/tmp/dnsmasq.d"
1069         xappend "--conf-dir=$dnsmasqconfdir"
1070         dnsmasqconfdir="${dnsmasqconfdir%%,*}"
1071         [ ! -d "$dnsmasqconfdir" ] && mkdir -p $dnsmasqconfdir
1072         xappend "--user=dnsmasq"
1073         xappend "--group=dnsmasq"
1074         echo >> $CONFIGFILE_TMP
1075
1076         config_get_bool enable_tftp "$cfg" enable_tftp 0
1077         [ "$enable_tftp" -gt 0 ] && {
1078                 config_get tftp_root "$cfg" tftp_root
1079                 append EXTRA_MOUNT $tftp_root
1080         }
1081
1082         config_foreach filter_dnsmasq host dhcp_host_add "$cfg"
1083         echo >> $CONFIGFILE_TMP
1084
1085         config_get_bool dhcpbogushostname "$cfg" dhcpbogushostname 1
1086         [ "$dhcpbogushostname" -gt 0 ] && {
1087                 xappend "--dhcp-ignore-names=tag:dhcp_bogus_hostname"
1088                 [ -r "$DHCPBOGUSHOSTNAMEFILE" ] && xappend "--conf-file=$DHCPBOGUSHOSTNAMEFILE"
1089         }
1090
1091         config_foreach filter_dnsmasq boot dhcp_boot_add "$cfg"
1092         config_foreach filter_dnsmasq mac dhcp_mac_add "$cfg"
1093         config_foreach filter_dnsmasq tag dhcp_tag_add "$cfg"
1094         config_foreach filter_dnsmasq vendorclass dhcp_vendorclass_add "$cfg"
1095         config_foreach filter_dnsmasq userclass dhcp_userclass_add "$cfg"
1096         config_foreach filter_dnsmasq circuitid dhcp_circuitid_add "$cfg"
1097         config_foreach filter_dnsmasq remoteid dhcp_remoteid_add "$cfg"
1098         config_foreach filter_dnsmasq subscrid dhcp_subscrid_add "$cfg"
1099         config_foreach filter_dnsmasq match dhcp_match_add "$cfg"
1100         config_foreach filter_dnsmasq domain dhcp_domain_add "$cfg"
1101         config_foreach filter_dnsmasq hostrecord dhcp_hostrecord_add "$cfg"
1102         [ -n "$BOOT" ] || config_foreach filter_dnsmasq relay dhcp_relay_add "$cfg"
1103
1104         echo >> $CONFIGFILE_TMP
1105         config_foreach filter_dnsmasq srvhost dhcp_srv_add "$cfg"
1106         config_foreach filter_dnsmasq mxhost dhcp_mx_add "$cfg"
1107         echo >> $CONFIGFILE_TMP
1108
1109         config_get_bool boguspriv "$cfg" boguspriv 1
1110         [ "$boguspriv" -gt 0 ] && {
1111                 xappend "--bogus-priv"
1112                 [ -r "$RFC6761FILE" ] && xappend "--conf-file=$RFC6761FILE"
1113         }
1114
1115         if [ "$DNSMASQ_DHCP_VER" -gt 4 ] ; then
1116                 # Enable RA feature for when/if it is constructed,
1117                 # and RA is selected per interface pool (RA, DHCP, or both),
1118                 # but no one (should) want RA broadcast in syslog
1119                 [ -n "$BOOT" ] || config_foreach filter_dnsmasq dhcp dhcp_add "$cfg"
1120                 xappend "--enable-ra"
1121                 xappend "--quiet-ra"
1122                 append_bool "$cfg" quietdhcp "--quiet-dhcp6"
1123
1124         elif [ "$DNSMASQ_DHCP_VER" -gt 0 ] ; then
1125                 [ -n "$BOOT" ] || config_foreach filter_dnsmasq dhcp dhcp_add "$cfg"
1126         fi
1127
1128
1129         echo >> $CONFIGFILE_TMP
1130         config_foreach filter_dnsmasq cname dhcp_cname_add "$cfg"
1131         echo >> $CONFIGFILE_TMP
1132
1133         echo >> $CONFIGFILE_TMP
1134         config_foreach filter_dnsmasq ipset dnsmasq_ipset_add "$cfg"
1135         echo >> $CONFIGFILE_TMP
1136
1137         echo >> $CONFIGFILE_TMP
1138         mv -f $CONFIGFILE_TMP $CONFIGFILE
1139         mv -f $HOSTFILE_TMP $HOSTFILE
1140
1141         [ "$localuse" -gt 0 ] && {
1142                 rm -f /tmp/resolv.conf
1143                 [ $ADD_LOCAL_DOMAIN -eq 1 ] && [ -n "$DOMAIN" ] && {
1144                         echo "search $DOMAIN" >> /tmp/resolv.conf
1145                 }
1146                 DNS_SERVERS="$DNS_SERVERS 127.0.0.1"
1147                 [ -e /proc/sys/net/ipv6 ] && DNS_SERVERS="$DNS_SERVERS ::1"
1148                 for DNS_SERVER in $DNS_SERVERS ; do
1149                         echo "nameserver $DNS_SERVER" >> /tmp/resolv.conf
1150                 done
1151         }
1152
1153         procd_open_instance $cfg
1154         procd_set_param command $PROG -C $CONFIGFILE -k -x /var/run/dnsmasq/dnsmasq."${cfg}".pid
1155         procd_set_param file $CONFIGFILE
1156         [ -n "$user_dhcpscript" ] && procd_set_param env USER_DHCPSCRIPT="$user_dhcpscript"
1157         procd_set_param respawn
1158
1159         local instance_ifc instance_netdev
1160         config_get instance_ifc "$cfg" interface
1161         [ -n "$instance_ifc" ] && network_get_device instance_netdev "$instance_ifc" &&
1162                 [ -n "$instance_netdev" ] && procd_set_param netdev $instance_netdev
1163
1164         procd_add_jail dnsmasq ubus log
1165         procd_add_jail_mount $CONFIGFILE $DHCPBOGUSHOSTNAMEFILE $DHCPSCRIPT $DHCPSCRIPT_DEPENDS
1166         procd_add_jail_mount $EXTRA_MOUNT $RFC6761FILE $TRUSTANCHORSFILE
1167         procd_add_jail_mount $dnsmasqconffile $dnsmasqconfdir $resolvdir $user_dhcpscript
1168         procd_add_jail_mount /etc/passwd /etc/group /etc/TZ /etc/hosts /etc/ethers
1169         procd_add_jail_mount_rw /var/run/dnsmasq/ $leasefile
1170         case "$logfacility" in */*)
1171                 [ ! -e "$logfacility" ] && touch "$logfacility"
1172                 procd_add_jail_mount_rw "$logfacility"
1173         esac
1174
1175         procd_close_instance
1176 }
1177
1178 dnsmasq_stop()
1179 {
1180         local cfg="$1"
1181         local noresolv resolvfile localuse=0
1182
1183         config_get_bool noresolv "$cfg" noresolv 0
1184         config_get resolvfile "$cfg" "resolvfile"
1185
1186         [ "$noresolv" = 0 ] && [ "$resolvfile" = "/tmp/resolv.conf.d/resolv.conf.auto" ] && localuse=1
1187         config_get_bool localuse "$cfg" localuse "$localuse"
1188         [ "$localuse" -gt 0 ] && ln -sf "/tmp/resolv.conf.d/resolv.conf.auto" /tmp/resolv.conf
1189
1190         rm -f ${BASEDHCPSTAMPFILE}.${cfg}.*.dhcp
1191 }
1192
1193 add_interface_trigger()
1194 {
1195         local interface ignore
1196
1197         config_get interface "$1" interface
1198         config_get_bool ignore "$1" ignore 0
1199
1200         [ -n "$interface" ] && [ $ignore -eq 0 ] && procd_add_interface_trigger "interface.*" "$interface" /etc/init.d/dnsmasq reload
1201 }
1202
1203 service_triggers()
1204 {
1205         procd_add_reload_trigger "dhcp" "system"
1206
1207         config_load dhcp
1208         config_foreach add_interface_trigger dhcp
1209         config_foreach add_interface_trigger relay
1210 }
1211
1212 boot()
1213 {
1214         BOOT=1
1215         start "$@"
1216 }
1217
1218 start_service() {
1219         local instance="$1"
1220         local instance_found=0
1221         local first_instance=""
1222
1223         . /lib/functions/network.sh
1224
1225         config_cb() {
1226                 local type="$1"
1227                 local name="$2"
1228                 if [ "$type" = "dnsmasq" ]; then
1229                         if [ -n "$instance" ] && [ "$instance" = "$name" ]; then
1230                                 instance_found=1
1231                         fi
1232                         if [ -z "$DEFAULT_INSTANCE" ]; then
1233                                 local disabled
1234                                 config_get_bool disabled "$name" disabled 0
1235                                 if [ "$disabled" -eq 0 ]; then
1236                                         # First enabled section will be assigned default instance name.
1237                                         # Unnamed sections get precedence over named sections.
1238                                         if expr "$cfg" : 'cfg[0-9a-f]*$' >/dev/null = "9"; then # See uci_fixup_section.
1239                                                 DEFAULT_INSTANCE="$name" # Unnamed config section.
1240                                         elif [ -z "$first_instance" ]; then
1241                                                 first_instance="$name"
1242                                         fi
1243                                 fi
1244                         fi
1245                 fi
1246         }
1247
1248         DEFAULT_INSTANCE=""
1249         config_load dhcp
1250         if [ -z "$DEFAULT_INSTANCE" ]; then
1251                 DEFAULT_INSTANCE="$first_instance" # No unnamed config section was found.
1252         fi
1253
1254         if [ -n "$instance" ]; then
1255                 [ "$instance_found" -gt 0 ] || return
1256                 dnsmasq_start "$instance"
1257         else
1258                 config_foreach dnsmasq_start dnsmasq
1259         fi
1260 }
1261
1262 reload_service() {
1263         rc_procd start_service "$@"
1264         procd_send_signal dnsmasq "$@"
1265 }
1266
1267 stop_service() {
1268         local instance="$1"
1269         local instance_found=0
1270
1271         config_cb() {
1272                 local type="$1"
1273                 local name="$2"
1274                 if [ "$type" = "dnsmasq" ]; then
1275                         if [ -n "$instance" ] && [ "$instance" = "$name" ]; then
1276                                 instance_found=1
1277                         fi
1278                 fi
1279         }
1280
1281         config_load dhcp
1282
1283         if [ -n "$instance" ]; then
1284                 [ "$instance_found" -gt 0 ] || return
1285                 dnsmasq_stop "$instance"
1286         else
1287                 config_foreach dnsmasq_stop dnsmasq
1288         fi
1289 }