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 BASETIMESTAMPFILE="/etc/dnsmasq.time"
  17 TRUSTANCHORSFILE="/usr/share/dnsmasq/trust-anchors.conf"
  18 TIMEVALIDFILE="/var/state/dnsmasqsec"
  19 BASEDHCPSTAMPFILE="/var/run/dnsmasq"
  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="$1"
 280         local hosttag nametime addrs duids
 281
 282         config_get_bool force "$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}" >> $HOSTFILE
 299         }
 300
 301         config_get mac "$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                 macs=""
 309                 for m in $mac; do append macs "$m" ","; done
 310         fi
 311
 312         if [ $DNSMASQ_DHCP_VER -eq 6 -a -n "$duid" ]; then
 313                 # --dhcp-host=id:00:03:00:01:12:00:00:01:02:03,[::beef],lap
 314                 # one (virtual) machine gets one DUID per RFC3315
 315                 duids="id:${duid// */}"
 316         fi
 317
 318         if [ -z "$macs" -a -z "$duids" ]; then
 319                 # --dhcp-host=lap,192.168.0.199,[::beef]
 320                 [ -n "$name" ] || return 0
 321                 macs="$name"
 322                 name=""
 323         fi
 324
 325         if [ -n "$hostid" ]; then
 326                 hex_to_hostid hostid "$hostid"
 327         fi
 328
 329         tags=""
 330         if [ -n "$tag" ]; then
 331                 for t in $tag; do append tags "$t" ",set:"; done
 332         fi
 333
 334         config_get_bool broadcast "$cfg" broadcast 0
 335         config_get leasetime "$cfg" leasetime
 336
 337         [ "$broadcast" = "0" ] && broadcast= || broadcast=",set:needs-broadcast"
 338
 339         hosttag="${networkid:+,set:${networkid}}${tags:+,set:${tags}}$broadcast"
 340         nametime="${name:+,$name}${leasetime:+,$leasetime}"
 341
 342         if [ $DNSMASQ_DHCP_VER -eq 6 ]; then
 343                 addrs="${ip:+,$ip}${hostid:+,[::$hostid]}"
 344                 xappend "--dhcp-host=$macs${duids:+,$duids}$hosttag$addrs$nametime"
 345         else
 346                 xappend "--dhcp-host=$macs$hosttag${ip:+,$ip}$nametime"
 347         fi
 348 }
 349
 350 dhcp_this_host_add() {
 351         local net="$1"
 352         local ifname="$2"
 353         local mode="$3"
 354         local routerstub routername ifdashname
 355         local lanaddr lanaddr6 lanaddrs6 ulaprefix
 356
 357         if [ "$mode" -gt 0 ] ; then
 358                 ifdashname="${ifname//./-}"
 359                 routerstub="$( md5sum /etc/os-release )"
 360                 routerstub="router-${routerstub// */}"
 361                 routername="$( uci_get system @system[0] hostname $routerstub )"
 362
 363                 if [ "$mode" -gt 1 ] ; then
 364                         if [ "$mode" -gt 2 ] ; then
 365                                 if [ "$mode" -gt 3 ] ; then
 366                                         append_interface_name "$ifdashname.$routername.$DOMAIN" "$ifname"
 367                                 fi
 368
 369                                 append_interface_name "$routername.$DOMAIN" "$ifname"
 370                         fi
 371
 372                         # All IP addresses discovered by dnsmasq will be labeled (except fe80::)
 373                         append_interface_name "$routername" "$ifname"
 374
 375                 else
 376                         # This uses a static host file entry for only limited addresses.
 377                         # Use dnsmasq option "--expandhosts" to enable FQDN on host files.
 378                         ulaprefix="$(uci_get network @globals[0] ula_prefix)"
 379                         network_get_ipaddr lanaddr "$net"
 380                         network_get_ipaddrs6 lanaddrs6 "$net"
 381
 382                         if [ -n "$lanaddr" ] ; then
 383                                 dhcp_domain_add "" "$routername" "$lanaddr"
 384                         fi
 385
 386                         if [ -n "$ulaprefix" -a -n "$lanaddrs6" ] ; then
 387                                 for lanaddr6 in $lanaddrs6 ; do
 388                                         case "$lanaddr6" in
 389                                         "${ulaprefix%%:/*}"*)
 390                                                 dhcp_domain_add "" "$routername" "$lanaddr6"
 391                                                 ;;
 392                                         esac
 393                                 done
 394                         fi
 395                 fi
 396         fi
 397 }
 398
 399 dhcp_tag_add() {
 400         # NOTE: dnsmasq has explicit "option6:" prefix for DHCPv6 so no collisions
 401         local cfg="$1"
 402
 403         tag="$cfg"
 404
 405         [ -n "$tag" ] || return 0
 406
 407         config_get_bool force "$cfg" force 0
 408         [ "$force" = "0" ] && force=
 409
 410         config_get option "$cfg" dhcp_option
 411         for o in $option; do
 412                 xappend "--dhcp-option${force:+-force}=tag:$tag,$o"
 413         done
 414 }
 415
 416 dhcp_mac_add() {
 417         local cfg="$1"
 418
 419         config_get networkid "$cfg" networkid
 420         [ -n "$networkid" ] || return 0
 421
 422         config_get mac "$cfg" mac
 423         [ -n "$mac" ] || return 0
 424
 425         xappend "--dhcp-mac=$networkid,$mac"
 426
 427         dhcp_option_add "$cfg" "$networkid"
 428 }
 429
 430 dhcp_boot_add() {
 431         # TODO: BOOTURL is different between DHCPv4 and DHCPv6
 432         local cfg="$1"
 433
 434         config_get networkid "$cfg" networkid
 435
 436         config_get filename "$cfg" filename
 437         [ -n "$filename" ] || return 0
 438
 439         config_get servername "$cfg" servername
 440         config_get serveraddress "$cfg" serveraddress
 441
 442         [ -n "$serveraddress" -a ! -n "$servername" ] && return 0
 443
 444         xappend "--dhcp-boot=${networkid:+net:$networkid,}${filename}${servername:+,$servername}${serveraddress:+,$serveraddress}"
 445
 446         config_get_bool force "$cfg" force 0
 447
 448         dhcp_option_add "$cfg" "$networkid" "$force"
 449 }
 450
 451
 452 dhcp_add() {
 453         local cfg="$1"
 454         local dhcp6range="::"
 455         local nettag
 456         local tags
 457
 458         config_get net "$cfg" interface
 459         [ -n "$net" ] || return 0
 460
 461         config_get networkid "$cfg" networkid
 462         [ -n "$networkid" ] || networkid="$net"
 463
 464         network_get_device ifname "$net" || return 0
 465
 466         [ "$cachelocal" = "0" ] && network_get_dnsserver dnsserver "$net" && {
 467                 DNS_SERVERS="$DNS_SERVERS $dnsserver"
 468         }
 469
 470         append_bool "$cfg" ignore "--no-dhcp-interface=$ifname" && {
 471                 # Many ISP do not have useful names for DHCP customers (your WAN).
 472                 dhcp_this_host_add "$net" "$ifname" "$ADD_WAN_FQDN"
 473                 return 0
 474         }
 475
 476         network_get_subnet subnet "$net" || return 0
 477         network_get_protocol proto "$net" || return 0
 478
 479         # Do not support non-static interfaces for now
 480         [ static = "$proto" ] || return 0
 481
 482         # Override interface netmask with dhcp config if applicable
 483         config_get netmask "$cfg" netmask "${subnet##*/}"
 484
 485         #check for an already active dhcp server on the interface, unless 'force' is set
 486         config_get_bool force "$cfg" force 0
 487         [ $force -gt 0 ] || dhcp_check "$ifname" || return 0
 488
 489         config_get start "$cfg" start 100
 490         config_get limit "$cfg" limit 150
 491         config_get leasetime "$cfg" leasetime 12h
 492         config_get options "$cfg" options
 493         config_get_bool dynamicdhcp "$cfg" dynamicdhcp 1
 494
 495         config_get dhcpv4 "$cfg" dhcpv4
 496         config_get dhcpv6 "$cfg" dhcpv6
 497
 498         config_get ra "$cfg" ra
 499         config_get ra_management "$cfg" ra_management
 500         config_get ra_preference "$cfg" ra_preference
 501         config_get dns "$cfg" dns
 502
 503         config_list_foreach "$cfg" "interface_name" append_interface_name "$ifname"
 504
 505         # Put the router host name on this DHCP served interface address(es)
 506         dhcp_this_host_add "$net" "$ifname" "$ADD_LOCAL_FQDN"
 507
 508         start="$( dhcp_calc "$start" )"
 509
 510         add_tag() {
 511                 tags="${tags}tag:$1,"
 512         }
 513         config_list_foreach "$cfg" tag add_tag
 514
 515         nettag="${networkid:+set:${networkid},}"
 516
 517         if [ "$limit" -gt 0 ] ; then
 518                 limit=$((limit-1))
 519         fi
 520
 521         eval "$(ipcalc.sh "${subnet%%/*}" $netmask $start $limit)"
 522
 523         if [ "$dynamicdhcp" = "0" ] ; then
 524                 END="static"
 525                 dhcp6range="::,static"
 526         else
 527                 dhcp6range="::1000,::ffff"
 528         fi
 529
 530
 531         if [ "$dhcpv4" != "disabled" ] ; then
 532                 xappend "--dhcp-range=$tags$nettag$START,$END,$NETMASK,$leasetime${options:+ $options}"
 533         fi
 534
 535
 536         if [ $DNSMASQ_DHCP_VER -eq 6 -a "$ra" = "server" ] ; then
 537                 # Note: dnsmasq cannot just be a DHCPv6 server (all-in-1)
 538                 # and let some other machine(s) send RA pointing to it.
 539
 540                 case $ra_preference in
 541                 *high*)
 542                         xappend "--ra-param=$ifname,high,0,7200"
 543                         ;;
 544                 *low*)
 545                         xappend "--ra-param=$ifname,low,0,7200"
 546                         ;;
 547                 *)
 548                         # Send UNSOLICITED RA at default interval and live for 2 hours.
 549                         # TODO: convert flexible lease time into route life time (only seconds).
 550                         xappend "--ra-param=$ifname,0,7200"
 551                         ;;
 552                 esac
 553
 554                 if [ "$dhcpv6" = "disabled" ] ; then
 555                         ra_management="3"
 556                 fi
 557
 558
 559                 case $ra_management in
 560                 0)
 561                         # SLACC with DCHP for extended options
 562                         xappend "--dhcp-range=$nettag::,constructor:$ifname,ra-stateless,ra-names"
 563                         ;;
 564                 2)
 565                         # DHCP address and RA only for management redirection
 566                         xappend "--dhcp-range=$nettag$dhcp6range,constructor:$ifname,$leasetime"
 567                         ;;
 568                 3)
 569                         # SLAAC only but dnsmasq attempts to link HOSTNAME, DHCPv4 MAC, and SLAAC
 570                         xappend "--dhcp-range=$nettag::,constructor:$ifname,ra-only,ra-names"
 571                         ;;
 572                 *)
 573                         # SLAAC and full DHCP
 574                         xappend "--dhcp-range=$nettag$dhcp6range,constructor:$ifname,slaac,ra-names,$leasetime"
 575                         ;;
 576                 esac
 577
 578                 if [ -n "$dns" ]; then
 579                         dnss=""
 580                         for d in $dns; do append dnss "[$d]" ","; done
 581                 else
 582                         dnss="[::]"
 583                 fi
 584
 585                 dhcp_option_append "option6:dns-server,$dnss" "$networkid"
 586         fi
 587
 588         dhcp_option_add "$cfg" "$networkid" 0
 589         dhcp_option_add "$cfg" "$networkid" 2
 590 }
 591
 592 dhcp_option_append() {
 593         local option="$1"
 594         local networkid="$2"
 595         local force="$3"
 596
 597         xappend "--dhcp-option${force:+-force}=${networkid:+$networkid,}$option"
 598 }
 599
 600 dhcp_option_add() {
 601         # NOTE: dnsmasq has explicit "option6:" prefix for DHCPv6 so no collisions
 602         local cfg="$1"
 603         local networkid="$2"
 604         local force="$3"
 605         local opt="dhcp_option"
 606
 607         [ "$force" = "0" ] && force=
 608         [ "$force" = "2" ] && opt="dhcp_option_force"
 609
 610         local list_len
 611         config_get list_len "$cfg" "${opt}_LENGTH"
 612
 613         if [ -n "$list_len" ]; then
 614                 config_list_foreach "$cfg" "$opt" dhcp_option_append "$networkid" "$force"
 615         else
 616                 config_get dhcp_option "$cfg" "$opt"
 617
 618                 [ -n "$dhcp_option" ] && echo "Warning: the 'option $opt' syntax is deprecated, use 'list $opt'" >&2
 619
 620                 local option
 621                 for option in $dhcp_option; do
 622                         dhcp_option_append "$option" "$networkid" "$force"
 623                 done
 624         fi
 625 }
 626
 627 dhcp_domain_add() {
 628         local cfg="$1"
 629         local ip name names record
 630
 631         config_get names "$cfg" name "$2"
 632         [ -n "$names" ] || return 0
 633
 634         config_get ip "$cfg" ip "$3"
 635         [ -n "$ip" ] || return 0
 636
 637         for name in $names; do
 638                 record="${record:+$record }$name"
 639         done
 640
 641         echo "$ip $record" >> $HOSTFILE
 642 }
 643
 644 dhcp_srv_add() {
 645         local cfg="$1"
 646
 647         config_get srv "$cfg" srv
 648         [ -n "$srv" ] || return 0
 649
 650         config_get target "$cfg" target
 651         [ -n "$target" ] || return 0
 652
 653         config_get port "$cfg" port
 654         [ -n "$port" ] || return 0
 655
 656         config_get class "$cfg" class
 657         config_get weight "$cfg" weight
 658
 659         local service="$srv,$target,$port${class:+,$class${weight:+,$weight}}"
 660
 661         xappend "--srv-host=$service"
 662 }
 663
 664 dhcp_mx_add() {
 665         local cfg="$1"
 666         local domain relay pref
 667
 668         config_get domain "$cfg" domain
 669         [ -n "$domain" ] || return 0
 670
 671         config_get relay "$cfg" relay
 672         [ -n "$relay" ] || return 0
 673
 674         config_get pref "$cfg" pref 0
 675
 676         local service="$domain,$relay,$pref"
 677
 678         xappend "--mx-host=$service"
 679 }
 680
 681 dhcp_cname_add() {
 682         local cfg="$1"
 683         local cname target
 684
 685         config_get cname "$cfg" cname
 686         [ -n "$cname" ] || return 0
 687
 688         config_get target "$cfg" target
 689         [ -n "$target" ] || return 0
 690
 691         xappend "--cname=${cname},${target}"
 692 }
 693
 694 dhcp_hostrecord_add() {
 695         local cfg="$1"
 696         local names addresses record val
 697
 698         config_get names "$cfg" name "$2"
 699         if [ -z "$names" ]; then
 700                 return 0
 701         fi
 702
 703         config_get addresses "$cfg" ip "$3"
 704         if [ -z "$addresses" ]; then
 705                 return 0
 706         fi
 707
 708         for val in $names $addresses; do
 709                 record="${record:+$record,}$val"
 710         done
 711
 712         xappend "--host-record=$record"
 713 }
 714
 715 dhcp_relay_add() {
 716         local cfg="$1"
 717         local local_addr server_addr interface
 718
 719         config_get local_addr "$cfg" local_addr
 720         [ -n "$local_addr" ] || return 0
 721
 722         config_get server_addr "$cfg" server_addr
 723         [ -n "$server_addr" ] || return 0
 724
 725         config_get interface "$cfg" interface
 726         if [ -z "$interface" ]; then
 727                 xappend "--dhcp-relay=$local_addr,$server_addr"
 728         else
 729                 network_get_device ifname "$interface" || return
 730                 xappend "--dhcp-relay=$local_addr,$server_addr,$ifname"
 731         fi
 732 }
 733
 734 dnsmasq_start()
 735 {
 736         local cfg="$1" disabled resolvfile user_dhcpscript
 737
 738         config_get_bool disabled "$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         TIMESTAMPFILE="${BASETIMESTAMPFILE}.${cfg}"
 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 $HOSTFILE)
 754         mkdir -p /var/lib/misc
 755         chown dnsmasq:dnsmasq /var/run/dnsmasq
 756
 757         [ -f "$TIMESTAMPFILE" ] && rm -f "$TIMESTAMPFILE"
 758
 759         echo "# auto-generated config file from /etc/config/dhcp" > $CONFIGFILE_TMP
 760         echo "# auto-generated config file from /etc/config/dhcp" > $HOSTFILE
 761
 762         # if we did this last, we could override auto-generated config
 763         [ -f /etc/dnsmasq.conf ] && {
 764                 xappend "--conf-file=/etc/dnsmasq.conf"
 765         }
 766
 767         $PROG --version | grep -osqE "^Compile time options:.* DHCPv6( |$)" && DHCPv6CAPABLE=1 || DHCPv6CAPABLE=0
 768
 769
 770         if [ -x /usr/sbin/odhcpd -a -x /etc/init.d/odhcpd ] ; then
 771                 local odhcpd_is_main odhcpd_is_enabled
 772                 config_get odhcpd_is_main odhcpd maindhcp 0
 773                 /etc/init.d/odhcpd enabled && odhcpd_is_enabled=1 || odhcpd_is_enabled=0
 774
 775
 776                 if [ "$odhcpd_is_enabled" -eq 0 -a "$DHCPv6CAPABLE" -eq 1 ] ; then
 777                         # DHCP V4 and V6 in DNSMASQ
 778                         DNSMASQ_DHCP_VER=6
 779                 elif [ "$odhcpd_is_main" -gt 0 ] ; then
 780                         # ODHCPD is doing it all
 781                         DNSMASQ_DHCP_VER=0
 782                 else
 783                         # You have ODHCPD but use DNSMASQ for DHCPV4
 784                         DNSMASQ_DHCP_VER=4
 785                 fi
 786
 787         elif [ "$DHCPv6CAPABLE" -eq 1 ] ; then
 788                 # DHCP V4 and V6 in DNSMASQ
 789                 DNSMASQ_DHCP_VER=6
 790         else
 791                 DNSMASQ_DHCP_VER=4
 792         fi
 793
 794         # Allow DHCP/DHCPv6 to be handled by ISC DHCPD
 795         if [ -x /usr/sbin/dhcpd ] ; then
 796                 if [ -x /etc/init.d/dhcpd ] ; then
 797                         /etc/init.d/dhcpd enabled && DNSMASQ_DHCP_VER=0
 798                 fi
 799                 if [ -x /etc/init.d/dhcpd6 -a "$DNSMASQ_DHCP_VER" -gt 0 ] ; then
 800                         /etc/init.d/dhcpd6 enabled && DNSMASQ_DHCP_VER=4
 801                 fi
 802         fi
 803
 804         append_bool "$cfg" authoritative "--dhcp-authoritative"
 805         append_bool "$cfg" nodaemon "--no-daemon"
 806         append_bool "$cfg" domainneeded "--domain-needed"
 807         append_bool "$cfg" filterwin2k "--filterwin2k"
 808         append_bool "$cfg" nohosts "--no-hosts"
 809         append_bool "$cfg" nonegcache "--no-negcache"
 810         append_bool "$cfg" strictorder "--strict-order"
 811         append_bool "$cfg" logqueries "--log-queries=extra"
 812         append_bool "$cfg" noresolv "--no-resolv"
 813         append_bool "$cfg" localise_queries "--localise-queries"
 814         append_bool "$cfg" readethers "--read-ethers"
 815         append_bool "$cfg" dbus "--enable-dbus"
 816         append_bool "$cfg" expandhosts "--expand-hosts"
 817         config_get tftp_root "$cfg" "tftp_root"
 818         [ -n "$tftp_root" ] && mkdir -p "$tftp_root" && append_bool "$cfg" enable_tftp "--enable-tftp"
 819         append_bool "$cfg" tftp_no_fail "--tftp-no-fail"
 820         append_bool "$cfg" nonwildcard "--bind-dynamic" 1
 821         append_bool "$cfg" fqdn "--dhcp-fqdn"
 822         append_bool "$cfg" proxydnssec "--proxy-dnssec"
 823         append_bool "$cfg" localservice "--local-service"
 824         append_bool "$cfg" logdhcp "--log-dhcp"
 825         append_bool "$cfg" quietdhcp "--quiet-dhcp"
 826         append_bool "$cfg" sequential_ip "--dhcp-sequential-ip"
 827         append_bool "$cfg" allservers "--all-servers"
 828         append_bool "$cfg" noping "--no-ping"
 829
 830         append_parm "$cfg" logfacility "--log-facility"
 831
 832         append_parm "$cfg" cachesize "--cache-size"
 833         append_parm "$cfg" dnsforwardmax "--dns-forward-max"
 834         append_parm "$cfg" port "--port"
 835         append_parm "$cfg" ednspacket_max "--edns-packet-max"
 836         append_parm "$cfg" dhcpleasemax "--dhcp-lease-max"
 837         append_parm "$cfg" "queryport" "--query-port"
 838         append_parm "$cfg" "minport" "--min-port"
 839         append_parm "$cfg" "maxport" "--max-port"
 840         append_parm "$cfg" "domain" "--domain"
 841         append_parm "$cfg" "local" "--server"
 842         config_list_foreach "$cfg" "listen_address" append_listenaddress
 843         config_list_foreach "$cfg" "server" append_server
 844         config_list_foreach "$cfg" "rev_server" append_rev_server
 845         config_list_foreach "$cfg" "address" append_address
 846         config_list_foreach "$cfg" "ipset" append_ipset
 847         config_list_foreach "$cfg" "interface" append_interface
 848         config_list_foreach "$cfg" "notinterface" append_notinterface
 849         config_list_foreach "$cfg" "addnhosts" append_addnhosts
 850         config_list_foreach "$cfg" "bogusnxdomain" append_bogusnxdomain
 851         append_parm "$cfg" "leasefile" "--dhcp-leasefile" "/tmp/dhcp.leases"
 852         append_parm "$cfg" "serversfile" "--servers-file"
 853         append_parm "$cfg" "tftp_root" "--tftp-root"
 854         append_parm "$cfg" "dhcp_boot" "--dhcp-boot"
 855         append_parm "$cfg" "local_ttl" "--local-ttl"
 856         append_parm "$cfg" "pxe_prompt" "--pxe-prompt"
 857         config_list_foreach "$cfg" "pxe_service" append_pxe_service
 858         config_get DOMAIN "$cfg" domain
 859
 860         config_get_bool ADD_LOCAL_DOMAIN "$cfg" add_local_domain 1
 861         config_get_bool ADD_LOCAL_HOSTNAME "$cfg" add_local_hostname 1
 862         config_get ADD_LOCAL_FQDN "$cfg" add_local_fqdn ""
 863         config_get ADD_WAN_FQDN "$cfg" add_wan_fqdn 0
 864
 865         if [ -z "$ADD_LOCAL_FQDN" ] ; then
 866                 # maintain support for previous UCI
 867                 ADD_LOCAL_FQDN="$ADD_LOCAL_HOSTNAME"
 868         fi
 869
 870         config_get_bool readethers "$cfg" readethers
 871         [ "$readethers" = "1" -a \! -e "/etc/ethers" ] && touch /etc/ethers
 872
 873         config_get user_dhcpscript $cfg dhcpscript
 874         if has_handler || [ -n "$user_dhcpscript" ]; then
 875                 xappend "--dhcp-script=$DHCPSCRIPT"
 876         fi
 877
 878         config_get leasefile $cfg leasefile "/tmp/dhcp.leases"
 879         [ -n "$leasefile" -a \! -e "$leasefile" ] && touch "$leasefile"
 880         config_get_bool cachelocal "$cfg" cachelocal 1
 881
 882         config_get_bool noresolv "$cfg" noresolv 0
 883         if [ "$noresolv" != "1" ]; then
 884                 config_get resolvfile "$cfg" resolvfile "/tmp/resolv.conf.auto"
 885                 # So jail doesn't complain if file missing
 886                 [ -n "$resolvfile" -a \! -e "$resolvfile" ] && touch "$resolvfile"
 887         fi
 888
 889         [ -n "$resolvfile" ] && xappend "--resolv-file=$resolvfile"
 890
 891         config_get hostsfile "$cfg" dhcphostsfile
 892         [ -e "$hostsfile" ] && xappend "--dhcp-hostsfile=$hostsfile"
 893
 894         local rebind
 895         config_get_bool rebind "$cfg" rebind_protection 1
 896         [ $rebind -gt 0 ] && {
 897                 log_once \
 898                         "DNS rebinding protection is active," \
 899                         "will discard upstream RFC1918 responses!"
 900                 xappend "--stop-dns-rebind"
 901
 902                 local rebind_localhost
 903                 config_get_bool rebind_localhost "$cfg" rebind_localhost 0
 904                 [ $rebind_localhost -gt 0 ] && {
 905                         log_once "Allowing 127.0.0.0/8 responses"
 906                         xappend "--rebind-localhost-ok"
 907                 }
 908
 909                 append_rebind_domain() {
 910                         log_once "Allowing RFC1918 responses for domain $1"
 911                         xappend "--rebind-domain-ok=$1"
 912                 }
 913
 914                 config_list_foreach "$cfg" rebind_domain append_rebind_domain
 915         }
 916
 917         config_get_bool dnssec "$cfg" dnssec 0
 918         [ "$dnssec" -gt 0 ] && {
 919                 xappend "--conf-file=$TRUSTANCHORSFILE"
 920                 xappend "--dnssec"
 921                 [ -x /etc/init.d/sysntpd ] && {
 922                         /etc/init.d/sysntpd enabled
 923                         [ "$?" -ne 0 -o "$(uci_get system.ntp.enabled)" = "1" ] && {
 924                                 [ -f "$TIMEVALIDFILE" ] || xappend "--dnssec-no-timecheck"
 925                         }
 926                 }
 927                 append_bool "$cfg" dnsseccheckunsigned "--dnssec-check-unsigned"
 928         }
 929
 930         config_get addmac "$cfg" addmac 0
 931         [ "$addmac" != "0" ] && {
 932                 [ "$addmac" = "1" ] && addmac=
 933                 xappend "--add-mac${addmac:+="$addmac"}"
 934         }
 935
 936         dhcp_option_add "$cfg" "" 0
 937         dhcp_option_add "$cfg" "" 2
 938
 939         xappend "--dhcp-broadcast=tag:needs-broadcast"
 940
 941         xappend "--addn-hosts=$(dirname $HOSTFILE)"
 942
 943         config_get dnsmasqconfdir "$cfg" confdir "/tmp/dnsmasq.d"
 944         [ ! -d "$dnsmasqconfdir" ] && mkdir -p $dnsmasqconfdir
 945         xappend "--conf-dir=$dnsmasqconfdir"
 946         xappend "--user=dnsmasq"
 947         xappend "--group=dnsmasq"
 948         echo >> $CONFIGFILE_TMP
 949
 950         config_get_bool enable_tftp "$cfg" enable_tftp 0
 951         [ "$enable_tftp" -gt 0 ] && {
 952                 config_get tftp_root "$cfg" tftp_root
 953                 append EXTRA_MOUNT $tftp_root
 954         }
 955
 956         config_foreach filter_dnsmasq host dhcp_host_add "$cfg"
 957         echo >> $CONFIGFILE_TMP
 958         config_foreach filter_dnsmasq boot dhcp_boot_add "$cfg"
 959         config_foreach filter_dnsmasq mac dhcp_mac_add "$cfg"
 960         config_foreach filter_dnsmasq tag dhcp_tag_add "$cfg"
 961         config_foreach filter_dnsmasq vendorclass dhcp_vendorclass_add "$cfg"
 962         config_foreach filter_dnsmasq userclass dhcp_userclass_add "$cfg"
 963         config_foreach filter_dnsmasq circuitid dhcp_circuitid_add "$cfg"
 964         config_foreach filter_dnsmasq remoteid dhcp_remoteid_add "$cfg"
 965         config_foreach filter_dnsmasq subscrid dhcp_subscrid_add "$cfg"
 966         config_foreach filter_dnsmasq match dhcp_match_add "$cfg"
 967         config_foreach filter_dnsmasq domain dhcp_domain_add "$cfg"
 968         config_foreach filter_dnsmasq hostrecord dhcp_hostrecord_add "$cfg"
 969         config_foreach filter_dnsmasq relay dhcp_relay_add "$cfg"
 970
 971         echo >> $CONFIGFILE_TMP
 972         config_foreach filter_dnsmasq srvhost dhcp_srv_add "$cfg"
 973         config_foreach filter_dnsmasq mxhost dhcp_mx_add "$cfg"
 974         echo >> $CONFIGFILE_TMP
 975
 976         config_get_bool boguspriv "$cfg" boguspriv 1
 977         [ "$boguspriv" -gt 0 ] && {
 978                 xappend "--bogus-priv"
 979                 [ -r "$RFC6761FILE" ] && xappend "--conf-file=$RFC6761FILE"
 980         }
 981
 982         if [ "$DNSMASQ_DHCP_VER" -gt 4 ] ; then
 983                 # Enable RA feature for when/if it is constructed,
 984                 # and RA is selected per interface pool (RA, DHCP, or both),
 985                 # but no one (should) want RA broadcast in syslog
 986                 config_foreach filter_dnsmasq dhcp dhcp_add "$cfg"
 987                 xappend "--enable-ra"
 988                 xappend "--quiet-ra"
 989                 append_bool "$cfg" quietdhcp "--quiet-dhcp6"
 990
 991         elif [ "$DNSMASQ_DHCP_VER" -gt 0 ] ; then
 992                 config_foreach filter_dnsmasq dhcp dhcp_add "$cfg"
 993         fi
 994
 995
 996         echo >> $CONFIGFILE_TMP
 997         config_foreach filter_dnsmasq cname dhcp_cname_add "$cfg"
 998         echo >> $CONFIGFILE_TMP
 999
1000         echo >> $CONFIGFILE_TMP
1001         mv -f $CONFIGFILE_TMP $CONFIGFILE
1002
1003         [ "$resolvfile" = "/tmp/resolv.conf.auto" ] && {
1004                 rm -f /tmp/resolv.conf
1005                 [ $ADD_LOCAL_DOMAIN -eq 1 ] && [ -n "$DOMAIN" ] && {
1006                         echo "search $DOMAIN" >> /tmp/resolv.conf
1007                 }
1008                 DNS_SERVERS="$DNS_SERVERS 127.0.0.1"
1009                 for DNS_SERVER in $DNS_SERVERS ; do
1010                         echo "nameserver $DNS_SERVER" >> /tmp/resolv.conf
1011                 done
1012         }
1013
1014         procd_open_instance $cfg
1015         procd_set_param command $PROG -C $CONFIGFILE -k -x /var/run/dnsmasq/dnsmasq."${cfg}".pid
1016         procd_set_param file $CONFIGFILE
1017         [ -n "$user_dhcpscript" ] && procd_set_param env USER_DHCPSCRIPT="$user_dhcpscript"
1018         procd_set_param respawn
1019
1020         local dnsmasqconffile="/etc/dnsmasq.${cfg}.conf"
1021         if [ ! -r "$dnsmasqconffile" ]; then
1022                 dnsmasqconffile=/etc/dnsmasq.conf
1023         fi
1024
1025         procd_add_jail dnsmasq ubus log
1026         procd_add_jail_mount $CONFIGFILE $TRUSTANCHORSFILE $HOSTFILE $RFC6761FILE /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
1027         procd_add_jail_mount_rw /var/run/dnsmasq/ $leasefile
1028
1029         procd_close_instance
1030 }
1031
1032 dnsmasq_stop()
1033 {
1034         local cfg="$1"
1035
1036         config_get resolvfile "$cfg" "resolvfile"
1037
1038         #relink /tmp/resolve.conf only for main instance
1039         [ "$resolvfile" = "/tmp/resolv.conf.auto" ] && {
1040                 [ -f /tmp/resolv.conf ] && {
1041                         rm -f /tmp/resolv.conf
1042                         ln -s "$resolvfile" /tmp/resolv.conf
1043                 }
1044         }
1045
1046         rm -f ${BASEDHCPSTAMPFILE}.${cfg}.*.dhcp
1047 }
1048
1049 service_triggers()
1050 {
1051         procd_add_reload_trigger "dhcp"
1052         procd_add_raw_trigger "interface.*" 2000 /etc/init.d/dnsmasq reload
1053 }
1054
1055 boot()
1056 {
1057         BOOT=1
1058         start "$@"
1059 }
1060
1061 start_service() {
1062         local instance="$1"
1063         local instance_found=0
1064
1065         [ -n "$BOOT" ] && return
1066
1067         . /lib/functions/network.sh
1068
1069         config_cb() {
1070                 local type="$1"
1071                 local name="$2"
1072                 if [ "$type" = "dnsmasq" ]; then
1073                         if [ -n "$instance" -a "$instance" = "$name" ]; then
1074                                 instance_found=1
1075                         fi
1076                 fi
1077         }
1078
1079         config_load dhcp
1080
1081         if [ -n "$instance" ]; then
1082                 [ "$instance_found" -gt 0 ] || return
1083                 dnsmasq_start "$instance"
1084         else
1085                 config_foreach dnsmasq_start dnsmasq
1086         fi
1087 }
1088
1089 reload_service() {
1090         rc_procd start_service "$@"
1091         return 0
1092 }
1093
1094 stop_service() {
1095         local instance="$1"
1096         local instance_found=0
1097
1098         config_cb() {
1099                 local type="$1"
1100                 local name="$2"
1101                 if [ "$type" = "dnsmasq" ]; then
1102                         if [ -n "$instance" -a "$instance" = "$name" ]; then
1103                                 instance_found=1
1104                         fi
1105                 fi
1106         }
1107
1108         config_load dhcp
1109
1110         if [ -n "$instance" ]; then
1111                 [ "$instance_found" -gt 0 ] || return
1112                 dnsmasq_stop "$instance"
1113         else
1114                 config_foreach dnsmasq_stop dnsmasq
1115         fi
1116 }