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

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