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
  22 DNSMASQ_DHCP_VER=4
  23
  24 xappend() {
  25         local value="$1"
  26
  27         echo "${value#--}" >> $CONFIGFILE_TMP
  28 }
  29
  30 hex_to_hostid() {
  31         local var="$1"
  32         local hex="${2#0x}" # strip optional "0x" prefix
  33
  34         if [ -n "${hex//[0-9a-fA-F]/}" ]; then
  35                 # is invalid hex literal
  36                 return 1
  37         fi
  38
  39         # convert into host id
  40         export "$var=$(
  41                 printf "%0x:%0x" \
  42                 $(((0x$hex >> 16) % 65536)) \
  43                 $(( 0x$hex        % 65536))
  44                 )"
  45
  46         return 0
  47 }
  48
  49 dhcp_calc() {
  50         local ip="$1"
  51         local res=0
  52
  53         while [ -n "$ip" ]; do
  54                 part="${ip%%.*}"
  55                 res="$(($res * 256))"
  56                 res="$(($res + $part))"
  57                 [ "${ip%.*}" != "$ip" ] && ip="${ip#*.}" || ip=
  58         done
  59         echo "$res"
  60 }
  61
  62 dhcp_check() {
  63         local ifname="$1"
  64         local stamp="${BASEDHCPSTAMPFILE_CFG}.${ifname}.dhcp"
  65         local rv=0
  66
  67         [ -s "$stamp" ] && return $(cat "$stamp")
  68
  69         # If there's no carrier yet, skip this interface.
  70         # The init script will be called again once the link is up
  71         case "$(devstatus "$ifname" | jsonfilter -e @.carrier)" in
  72                 false) return 1;;
  73         esac
  74
  75         udhcpc -n -q -s /bin/true -t 1 -i "$ifname" >&- && rv=1 || rv=0
  76
  77         [ $rv -eq 1 ] && \
  78                 logger -t dnsmasq \
  79                         "found already running DHCP-server on interface '$ifname'" \
  80                         "refusing to start, use 'option force 1' to override"
  81
  82         echo $rv > "$stamp"
  83         return $rv
  84 }
  85
  86 log_once() {
  87         pidof dnsmasq >/dev/null || \
  88                 logger -t dnsmasq "$@"
  89 }
  90
  91 append_bool() {
  92         local section="$1"
  93         local option="$2"
  94         local value="$3"
  95         local _loctmp
  96         config_get_bool _loctmp "$section" "$option" 0
  97         [ $_loctmp -gt 0 ] && xappend "$value"
  98 }
  99
 100 append_parm() {
 101         local section="$1"
 102         local option="$2"
 103         local switch="$3"
 104         local default="$4"
 105         local _loctmp
 106         config_get _loctmp "$section" "$option" "$default"
 107         [ -z "$_loctmp" ] && return 0
 108         xappend "$switch=$_loctmp"
 109 }
 110
 111 append_server() {
 112         xappend "--server=$1"
 113 }
 114
 115 append_address() {
 116         xappend "--address=$1"
 117 }
 118
 119 append_ipset() {
 120         xappend "--ipset=$1"
 121 }
 122
 123 append_interface() {
 124         network_get_device ifname "$1" || return
 125         xappend "--interface=$ifname"
 126 }
 127
 128 append_notinterface() {
 129         network_get_device ifname "$1" || return
 130         xappend "--except-interface=$ifname"
 131 }
 132
 133 append_addnhosts() {
 134         xappend "--addn-hosts=$1"
 135 }
 136
 137 append_bogusnxdomain() {
 138         xappend "--bogus-nxdomain=$1"
 139 }
 140
 141 append_pxe_service() {
 142         xappend "--pxe-service=$1"
 143 }
 144
 145 filter_dnsmasq() {
 146         local cfg="$1" func="$2" match_cfg="$3" found_cfg
 147
 148         # use entry when no instance entry set, or if it matches
 149         config_get found_cfg "$cfg" "instance"
 150         if [ -z "$found_cfg" -o "$found_cfg" = "$match_cfg" ]; then
 151                 $func $cfg
 152         fi
 153 }
 154
 155 dhcp_subscrid_add() {
 156         local cfg="$1"
 157
 158         config_get networkid "$cfg" networkid
 159         [ -n "$networkid" ] || return 0
 160
 161         config_get subscriberid "$cfg" subscriberid
 162         [ -n "$subscriberid" ] || return 0
 163
 164         xappend "--dhcp-subscrid=$networkid,$subscriberid"
 165
 166         config_get_bool force "$cfg" force 0
 167
 168         dhcp_option_add "$cfg" "$networkid" "$force"
 169 }
 170
 171 dhcp_remoteid_add() {
 172         local cfg="$1"
 173
 174         config_get networkid "$cfg" networkid
 175         [ -n "$networkid" ] || return 0
 176
 177         config_get remoteid "$cfg" remoteid
 178         [ -n "$remoteid" ] || return 0
 179
 180         xappend "--dhcp-remoteid=$networkid,$remoteid"
 181
 182         config_get_bool force "$cfg" force 0
 183
 184         dhcp_option_add "$cfg" "$networkid" "$force"
 185 }
 186
 187 dhcp_circuitid_add() {
 188         # TODO: DHCPV6 does not have circuitid; catch "option6:"
 189         local cfg="$1"
 190
 191         config_get networkid "$cfg" networkid
 192         [ -n "$networkid" ] || return 0
 193
 194         config_get circuitid "$cfg" circuitid
 195         [ -n "$circuitid" ] || return 0
 196
 197         xappend "--dhcp-circuitid=$networkid,$circuitid"
 198
 199         config_get_bool force "$cfg" force 0
 200
 201         dhcp_option_add "$cfg" "$networkid" "$force"
 202 }
 203
 204 dhcp_userclass_add() {
 205         local cfg="$1"
 206
 207         config_get networkid "$cfg" networkid
 208         [ -n "$networkid" ] || return 0
 209
 210         config_get userclass "$cfg" userclass
 211         [ -n "$userclass" ] || return 0
 212
 213         xappend "--dhcp-userclass=$networkid,$userclass"
 214
 215         config_get_bool force "$cfg" force 0
 216
 217         dhcp_option_add "$cfg" "$networkid" "$force"
 218 }
 219
 220 dhcp_vendorclass_add() {
 221         # TODO: DHCPV6 vendor class has stricter definitions; catch? fixup?
 222         local cfg="$1"
 223
 224         config_get networkid "$cfg" networkid
 225         [ -n "$networkid" ] || return 0
 226
 227         config_get vendorclass "$cfg" vendorclass
 228         [ -n "$vendorclass" ] || return 0
 229
 230         xappend "--dhcp-vendorclass=$networkid,$vendorclass"
 231
 232         config_get_bool force "$cfg" force 0
 233
 234         dhcp_option_add "$cfg" "$networkid" "$force"
 235 }
 236
 237 dhcp_match_add() {
 238         local cfg="$1"
 239
 240         config_get networkid "$cfg" networkid
 241         [ -n "$networkid" ] || return 0
 242
 243         config_get match "$cfg" match
 244         [ -n "$match" ] || return 0
 245
 246         xappend "--dhcp-match=$networkid,$match"
 247
 248         config_get_bool force "$cfg" force 0
 249
 250         dhcp_option_add "$cfg" "$networkid" "$force"
 251 }
 252
 253 dhcp_host_add() {
 254         local cfg="$1"
 255         local hosttag nametime addrs
 256
 257         config_get_bool force "$cfg" force 0
 258
 259         config_get networkid "$cfg" networkid
 260         [ -n "$networkid" ] && dhcp_option_add "$cfg" "$networkid" "$force"
 261
 262         config_get_bool enable "$cfg" enable 1
 263         [ "$enable" = "0" ] && return 0
 264
 265         config_get name "$cfg" name
 266         config_get ip "$cfg" ip
 267         config_get hostid "$cfg" hostid
 268
 269         [ -n "$ip" -o -n "$name" -o -n "$hostid" ] || return 0
 270
 271         config_get_bool dns "$cfg" dns 0
 272         [ "$dns" = "1" -a -n "$ip" -a -n "$name" ] && {
 273                 echo "$ip $name${DOMAIN:+.$DOMAIN}" >> $HOSTFILE
 274         }
 275
 276         config_get mac "$cfg" mac
 277         config_get duid "$cfg" duid
 278         config_get tag "$cfg" tag
 279
 280         if [ -n "$mac" ]; then
 281                 # --dhcp-host=00:20:e0:3b:13:af,192.168.0.199,lap
 282                 # many MAC are possible to track a laptop ON/OFF dock
 283                 macs=""
 284                 for m in $mac; do append macs "$m" ","; done
 285         fi
 286
 287         if [ $DNSMASQ_DHCP_VER -eq 6 -a -n "$duid" ]; then
 288                 # --dhcp-host=id:00:03:00:01:12:00:00:01:02:03,[::beef],lap
 289                 # one (virtual) machine gets one DUID per RFC3315
 290                 duids="id:${duid// */}"
 291         fi
 292
 293         if [ -z "$macs" -a -z "$duids" ]; then
 294                 # --dhcp-host=lap,192.168.0.199,[::beef]
 295                 [ -n "$name" ] || return 0
 296                 macs="$name"
 297                 name=""
 298         fi
 299
 300         if [ -n "$hostid" ]; then
 301                         hex_to_hostid hostid "$hostid"
 302         fi
 303
 304         config_get_bool broadcast "$cfg" broadcast 0
 305         config_get leasetime "$cfg" leasetime
 306
 307         [ "$broadcast" = "0" ] && broadcast= || broadcast=",set:needs-broadcast"
 308
 309         hosttag="${networkid:+,set:${networkid}}${tag:+,set:${tag}}$broadcast"
 310         nametime="${name:+,$name}${leasetime:+,$leasetime}"
 311
 312         if [ $DNSMASQ_DHCP_VER -eq 6 ]; then
 313                 addrs="${ip:+,$ip}${hostid:+,[::$hostid]}"
 314                 xappend "--dhcp-host=$macs${duids:+,$duids}$hosttag$addrs$nametime"
 315         else
 316                 xappend "--dhcp-host=$macs$hosttag${ip:+,$ip}$nametime"
 317         fi
 318 }
 319
 320 dhcp_this_host_add() {
 321         local net="$1"
 322         local ifname="$2"
 323         local mode="$3"
 324         local routerstub routername ifdashname
 325         local lanaddr lanaddr6 lanaddrs6 ulaprefix
 326
 327         if [ "$mode" -gt 0 ] ; then
 328                 ifdashname="${ifname//./-}"
 329                 routerstub="$( md5sum /etc/os-release )"
 330                 routerstub="router-${routerstub// */}"
 331                 routername="$( uci_get system @system[0] hostname $routerstub )"
 332
 333                 if [ "$mode" -gt 1 ] ; then
 334                         if [ "$mode" -gt 2 ] ; then
 335                                 if [ "$mode" -gt 3 ] ; then
 336                                         xappend "--interface-name=$ifdashname.$routername.$DOMAIN,$ifname"
 337                                 fi
 338
 339                                 xappend "--interface-name=$routername.$DOMAIN,$ifname"
 340                         fi
 341
 342                         # All IP addresses discovered by dnsmasq will be labeled (except fe80::)
 343                         xappend "--interface-name=$routername,$ifname"
 344
 345                 else
 346                         # This uses a static host file entry for only limited addresses.
 347                         # Use dnsmasq option "--expandhosts" to enable FQDN on host files.
 348                         ulaprefix="$(uci_get network @globals[0] ula_prefix)"
 349                         network_get_ipaddr lanaddr "$net"
 350                         network_get_ipaddrs6 lanaddrs6 "$net"
 351
 352                         if [ -n "$lanaddr" ] ; then
 353                                 dhcp_domain_add "" "$routername" "$lanaddr"
 354                         fi
 355
 356                         if [ -n "$ulaprefix" -a -n "$lanaddrs6" ] ; then
 357                                 for lanaddr6 in $lanaddrs6 ; do
 358                                         case "$lanaddr6" in
 359                                         "${ulaprefix%%:/*}"*)
 360                                                         dhcp_domain_add "" "$routername" "$lanaddr6"
 361                                                         ;;
 362                                         esac
 363                                 done
 364                         fi
 365                 fi
 366         fi
 367 }
 368
 369 dhcp_tag_add() {
 370         # NOTE: dnsmasq has explicit "option6:" prefix for DHCPv6 so no collisions
 371         local cfg="$1"
 372
 373         tag="$cfg"
 374
 375         [ -n "$tag" ] || return 0
 376
 377         config_get_bool force "$cfg" force 0
 378         [ "$force" = "0" ] && force=
 379
 380         config_get option "$cfg" dhcp_option
 381         for o in $option; do
 382                 xappend "--dhcp-option${force:+-force}=tag:$tag,$o"
 383         done
 384 }
 385
 386 dhcp_mac_add() {
 387         local cfg="$1"
 388
 389         config_get networkid "$cfg" networkid
 390         [ -n "$networkid" ] || return 0
 391
 392         config_get mac "$cfg" mac
 393         [ -n "$mac" ] || return 0
 394
 395         xappend "--dhcp-mac=$networkid,$mac"
 396
 397         dhcp_option_add "$cfg" "$networkid"
 398 }
 399
 400 dhcp_boot_add() {
 401         # TODO: BOOTURL is different between DHCPv4 and DHCPv6
 402         local cfg="$1"
 403
 404         config_get networkid "$cfg" networkid
 405
 406         config_get filename "$cfg" filename
 407         [ -n "$filename" ] || return 0
 408
 409         config_get servername "$cfg" servername
 410         config_get serveraddress "$cfg" serveraddress
 411
 412         [ -n "$serveraddress" -a ! -n "$servername" ] && return 0
 413
 414         xappend "--dhcp-boot=${networkid:+net:$networkid,}${filename}${servername:+,$servername}${serveraddress:+,$serveraddress}"
 415
 416         config_get_bool force "$cfg" force 0
 417
 418         dhcp_option_add "$cfg" "$networkid" "$force"
 419 }
 420
 421
 422 dhcp_add() {
 423         local cfg="$1"
 424         local dhcp6range="::"
 425         local nettag
 426
 427         config_get net "$cfg" interface
 428         [ -n "$net" ] || return 0
 429
 430         config_get networkid "$cfg" networkid
 431         [ -n "$networkid" ] || networkid="$net"
 432
 433         network_get_subnet subnet "$net" || return 0
 434         network_get_device ifname "$net" || return 0
 435         network_get_protocol proto "$net" || return 0
 436
 437         [ "$cachelocal" = "0" ] && network_get_dnsserver dnsserver "$net" && {
 438                 DNS_SERVERS="$DNS_SERVERS $dnsserver"
 439         }
 440
 441         append_bool "$cfg" ignore "--no-dhcp-interface=$ifname" && {
 442                 # Many ISP do not have useful names for DHCP customers (your WAN).
 443                 dhcp_this_host_add "$net" "$ifname" "$ADD_WAN_FQDN"
 444                 return 0
 445         }
 446
 447         # Do not support non-static interfaces for now
 448         [ static = "$proto" ] || return 0
 449
 450         # Override interface netmask with dhcp config if applicable
 451         config_get netmask "$cfg" netmask "${subnet##*/}"
 452
 453         #check for an already active dhcp server on the interface, unless 'force' is set
 454         config_get_bool force "$cfg" force 0
 455         [ $force -gt 0 ] || dhcp_check "$ifname" || return 0
 456
 457         config_get start "$cfg" start 100
 458         config_get limit "$cfg" limit 150
 459         config_get leasetime "$cfg" leasetime 12h
 460         config_get options "$cfg" options
 461         config_get_bool dynamicdhcp "$cfg" dynamicdhcp 1
 462
 463         config_get dhcpv4 "$cfg" dhcpv4
 464         config_get dhcpv6 "$cfg" dhcpv6
 465
 466         config_get ra "$cfg" ra
 467         config_get ra_management "$cfg" ra_management
 468         config_get ra_preference "$cfg" ra_preference
 469
 470         # Put the router host name on this DHCP served interface address(es)
 471         dhcp_this_host_add "$net" "$ifname" "$ADD_LOCAL_FQDN"
 472
 473         start="$( dhcp_calc "$start" )"
 474         nettag="${networkid:+set:${networkid},}"
 475
 476         if [ "$limit" -gt 0 ] ; then
 477                 limit=$((limit-1))
 478         fi
 479
 480         eval "$(ipcalc.sh "${subnet%%/*}" $netmask $start $limit)"
 481
 482         if [ "$dynamicdhcp" = "0" ] ; then
 483                 END="static"
 484                 dhcp6range="::,static"
 485         else
 486                 dhcp6range="::1000,::ffff"
 487         fi
 488
 489
 490         if [ "$dhcpv4" != "disabled" ] ; then
 491                 xappend "--dhcp-range=$nettag$START,$END,$NETMASK,$leasetime${options:+ $options}"
 492         fi
 493
 494
 495         if [ $DNSMASQ_DHCP_VER -eq 6 -a "$ra" = "server" ] ; then
 496                 # Note: dnsmasq cannot just be a DHCPv6 server (all-in-1)
 497                 # and let some other machine(s) send RA pointing to it.
 498
 499                 case $ra_preference in
 500                 *high*)
 501                         xappend "--ra-param=$ifname,high,0,7200"
 502                         ;;
 503                 *low*)
 504                         xappend "--ra-param=$ifname,low,0,7200"
 505                         ;;
 506                 *)
 507                         # Send UNSOLICITED RA at default interval and live for 2 hours.
 508                         # TODO: convert flexible lease time into route life time (only seconds).
 509                         xappend "--ra-param=$ifname,0,7200"
 510                         ;;
 511                 esac
 512
 513                 if [ "$dhcpv6" = "disabled" ] ; then
 514                         ra_management="3"
 515                 fi
 516
 517
 518                 case $ra_management in
 519                 0)
 520                         # SLACC with DCHP for extended options
 521                         xappend "--dhcp-range=$nettag::,constructor:$ifname,ra-stateless,ra-names"
 522                         ;;
 523                 2)
 524                         # DHCP address and RA only for management redirection
 525                         xappend "--dhcp-range=$nettag$dhcp6range,constructor:$ifname,$leasetime"
 526                         ;;
 527                 3)
 528                         # SLAAC only but dnsmasq attempts to link HOSTNAME, DHCPv4 MAC, and SLAAC
 529                         xappend "--dhcp-range=$nettag::,constructor:$ifname,ra-only,ra-names"
 530                         ;;
 531                 *)
 532                         # SLAAC and full DHCP
 533                         xappend "--dhcp-range=$nettag$dhcp6range,constructor:$ifname,slaac,ra-names,$leasetime"
 534                         ;;
 535                 esac
 536         fi
 537
 538         dhcp_option_add "$cfg" "$networkid"
 539 }
 540
 541 dhcp_option_append() {
 542         local option="$1"
 543         local networkid="$2"
 544         local force="$3"
 545
 546         xappend "--dhcp-option${force:+-force}=${networkid:+$networkid,}$option"
 547 }
 548
 549 dhcp_option_add() {
 550         # NOTE: dnsmasq has explicit "option6:" prefix for DHCPv6 so no collisions
 551         local cfg="$1"
 552         local networkid="$2"
 553         local force="$3"
 554
 555         [ "$force" = "0" ] && force=
 556
 557         local list_len
 558         config_get list_len "$cfg" dhcp_option_LENGTH
 559
 560         if [ -n "$list_len" ]; then
 561                 config_list_foreach "$cfg" dhcp_option dhcp_option_append "$networkid" "$force"
 562         else
 563                 config_get dhcp_option "$cfg" dhcp_option
 564
 565                 [ -n "$dhcp_option" ] && echo "Warning: the 'option dhcp_option' syntax is deprecated, use 'list dhcp_option'" >&2
 566
 567                 local option
 568                 for option in $dhcp_option; do
 569                         dhcp_option_append "$option" "$networkid" "$force"
 570                 done
 571         fi
 572 }
 573
 574 dhcp_domain_add() {
 575         local cfg="$1"
 576         local ip name names record
 577
 578         config_get names "$cfg" name "$2"
 579         [ -n "$names" ] || return 0
 580
 581         config_get ip "$cfg" ip "$3"
 582         [ -n "$ip" ] || return 0
 583
 584         for name in $names; do
 585                 record="${record:+$record }$name"
 586         done
 587
 588         echo "$ip $record" >> $HOSTFILE
 589 }
 590
 591 dhcp_srv_add() {
 592         local cfg="$1"
 593
 594         config_get srv "$cfg" srv
 595         [ -n "$srv" ] || return 0
 596
 597         config_get target "$cfg" target
 598         [ -n "$target" ] || return 0
 599
 600         config_get port "$cfg" port
 601         [ -n "$port" ] || return 0
 602
 603         config_get class "$cfg" class
 604         config_get weight "$cfg" weight
 605
 606         local service="$srv,$target,$port${class:+,$class${weight:+,$weight}}"
 607
 608         xappend "--srv-host=$service"
 609 }
 610
 611 dhcp_mx_add() {
 612         local cfg="$1"
 613         local domain relay pref
 614
 615         config_get domain "$cfg" domain
 616         [ -n "$domain" ] || return 0
 617
 618         config_get relay "$cfg" relay
 619         [ -n "$relay" ] || return 0
 620
 621         config_get pref "$cfg" pref 0
 622
 623         local service="$domain,$relay,$pref"
 624
 625         xappend "--mx-host=$service"
 626 }
 627
 628 dhcp_cname_add() {
 629         local cfg="$1"
 630         local cname target
 631
 632         config_get cname "$cfg" cname
 633         [ -n "$cname" ] || return 0
 634
 635         config_get target "$cfg" target
 636         [ -n "$target" ] || return 0
 637
 638         xappend "--cname=${cname},${target}"
 639 }
 640
 641 dhcp_hostrecord_add() {
 642         local cfg="$1"
 643         local names addresses record val
 644
 645         config_get names "$cfg" name "$2"
 646         if [ -z "$names" ]; then
 647                 return 0
 648         fi
 649
 650         config_get addresses "$cfg" ip "$3"
 651         if [ -z "$addresses" ]; then
 652                 return 0
 653         fi
 654
 655         for val in $names $addresses; do
 656                 record="${record:+$record,}$val"
 657         done
 658
 659         xappend "--host-record=$record"
 660 }
 661
 662 dhcp_relay_add() {
 663         local cfg="$1"
 664         local local_addr server_addr interface
 665
 666         config_get local_addr "$cfg" local_addr
 667         [ -n "$local_addr" ] || return 0
 668
 669         config_get server_addr "$cfg" server_addr
 670         [ -n "$server_addr" ] || return 0
 671
 672         config_get interface "$cfg" interface
 673         if [ -z "$interface" ]; then
 674                 xappend "--dhcp-relay=$local_addr,$server_addr"
 675         else
 676                 network_get_device ifname "$interface" || return
 677                 xappend "--dhcp-relay=$local_addr,$server_addr,$ifname"
 678         fi
 679 }
 680
 681 dnsmasq_start()
 682 {
 683         local cfg="$1" disabled resolvfile
 684
 685         config_get_bool disabled "$cfg" disabled 0
 686         [ "$disabled" -gt 0 ] && return 0
 687
 688         # reset list of DOMAINS and DNS servers (for each dnsmasq instance)
 689         DNS_SERVERS=""
 690         DOMAIN=""
 691         CONFIGFILE="${BASECONFIGFILE}.${cfg}"
 692         CONFIGFILE_TMP="${CONFIGFILE}.$$"
 693         HOSTFILE="${BASEHOSTFILE}.${cfg}"
 694         TIMESTAMPFILE="${BASETIMESTAMPFILE}.${cfg}"
 695         BASEDHCPSTAMPFILE_CFG="${BASEDHCPSTAMPFILE}.${cfg}"
 696
 697         # before we can call xappend
 698         mkdir -p /var/run/dnsmasq/
 699         mkdir -p $(dirname $CONFIGFILE)
 700         mkdir -p $(dirname $HOSTFILE)
 701         mkdir -p /var/lib/misc
 702         chown dnsmasq:dnsmasq /var/run/dnsmasq
 703
 704         [ -f "$TIMESTAMPFILE" ] && rm -f "$TIMESTAMPFILE"
 705
 706         echo "# auto-generated config file from /etc/config/dhcp" > $CONFIGFILE_TMP
 707         echo "# auto-generated config file from /etc/config/dhcp" > $HOSTFILE
 708
 709         # if we did this last, we could override auto-generated config
 710         [ -f /etc/dnsmasq.conf ] && {
 711                 xappend "--conf-file=/etc/dnsmasq.conf"
 712         }
 713
 714         $PROG --version | grep -osqE "^Compile time options:.* DHCPv6( |$)" && DHCPv6CAPABLE=1 || DHCPv6CAPABLE=0
 715
 716
 717         if [ -x /usr/sbin/odhcpd -a -x /etc/init.d/odhcpd ] ; then
 718                 local odhcpd_is_main odhcpd_is_enabled
 719                 config_get odhcpd_is_main odhcpd maindhcp 0
 720                 /etc/init.d/odhcpd enabled && odhcpd_is_enabled=1 || odhcpd_is_enabled=0
 721
 722
 723                 if [ "$odhcpd_is_enabled" -eq 0 -a "$DHCPv6CAPABLE" -eq 1 ] ; then
 724                         # DHCP V4 and V6 in DNSMASQ
 725                         DNSMASQ_DHCP_VER=6
 726                 elif [ "$odhcpd_is_main" -gt 0 ] ; then
 727                         # ODHCPD is doing it all
 728                         DNSMASQ_DHCP_VER=0
 729                 else
 730                         # You have ODHCPD but use DNSMASQ for DHCPV4
 731                         DNSMASQ_DHCP_VER=4
 732                 fi
 733
 734         elif [ "$DHCPv6CAPABLE" -eq 1 ] ; then
 735                 # DHCP V4 and V6 in DNSMASQ
 736                 DNSMASQ_DHCP_VER=6
 737         else
 738                 DNSMASQ_DHCP_VER=4
 739         fi
 740
 741         # Allow DHCP/DHCPv6 to be handled by ISC DHCPD
 742         if [ -x /usr/sbin/dhcpd ] ; then
 743                 if [ -x /etc/init.d/dhcpd ] ; then
 744                         /etc/init.d/dhcpd enabled && DNSMASQ_DHCP_VER=0
 745                 fi
 746                 if [ -x /etc/init.d/dhcpd6 -a "$DNSMASQ_DHCP_VER" -gt 0 ] ; then
 747                         /etc/init.d/dhcpd6 enabled && DNSMASQ_DHCP_VER=4
 748                 fi
 749         fi
 750
 751         append_bool "$cfg" authoritative "--dhcp-authoritative"
 752         append_bool "$cfg" nodaemon "--no-daemon"
 753         append_bool "$cfg" domainneeded "--domain-needed"
 754         append_bool "$cfg" filterwin2k "--filterwin2k"
 755         append_bool "$cfg" nohosts "--no-hosts"
 756         append_bool "$cfg" nonegcache "--no-negcache"
 757         append_bool "$cfg" strictorder "--strict-order"
 758         append_bool "$cfg" logqueries "--log-queries=extra"
 759         append_bool "$cfg" noresolv "--no-resolv"
 760         append_bool "$cfg" localise_queries "--localise-queries"
 761         append_bool "$cfg" readethers "--read-ethers"
 762         append_bool "$cfg" dbus "--enable-dbus"
 763         append_bool "$cfg" expandhosts "--expand-hosts"
 764         config_get tftp_root "$cfg" "tftp_root"
 765         [ -n "$tftp_root" ] && mkdir -p "$tftp_root" && append_bool "$cfg" enable_tftp "--enable-tftp"
 766         append_bool "$cfg" tftp_no_fail "--tftp-no-fail"
 767         append_bool "$cfg" nonwildcard "--bind-dynamic"
 768         append_bool "$cfg" fqdn "--dhcp-fqdn"
 769         append_bool "$cfg" proxydnssec "--proxy-dnssec"
 770         append_bool "$cfg" localservice "--local-service"
 771         append_bool "$cfg" logdhcp "--log-dhcp"
 772         append_bool "$cfg" quietdhcp "--quiet-dhcp"
 773         append_bool "$cfg" sequential_ip "--dhcp-sequential-ip"
 774         append_bool "$cfg" allservers "--all-servers"
 775         append_bool "$cfg" noping "--no-ping"
 776
 777         append_parm "$cfg" logfacility "--log-facility"
 778         append_parm "$cfg" dhcpscript "--dhcp-script"
 779         append_parm "$cfg" cachesize "--cache-size"
 780         append_parm "$cfg" dnsforwardmax "--dns-forward-max"
 781         append_parm "$cfg" port "--port"
 782         append_parm "$cfg" ednspacket_max "--edns-packet-max"
 783         append_parm "$cfg" dhcpleasemax "--dhcp-lease-max"
 784         append_parm "$cfg" "queryport" "--query-port"
 785         append_parm "$cfg" "minport" "--min-port"
 786         append_parm "$cfg" "maxport" "--max-port"
 787         append_parm "$cfg" "domain" "--domain"
 788         append_parm "$cfg" "local" "--server"
 789         config_list_foreach "$cfg" "server" append_server
 790         config_list_foreach "$cfg" "address" append_address
 791         config_list_foreach "$cfg" "ipset" append_ipset
 792         config_list_foreach "$cfg" "interface" append_interface
 793         config_list_foreach "$cfg" "notinterface" append_notinterface
 794         config_list_foreach "$cfg" "addnhosts" append_addnhosts
 795         config_list_foreach "$cfg" "bogusnxdomain" append_bogusnxdomain
 796         append_parm "$cfg" "leasefile" "--dhcp-leasefile" "/tmp/dhcp.leases"
 797         append_parm "$cfg" "serversfile" "--servers-file"
 798         append_parm "$cfg" "tftp_root" "--tftp-root"
 799         append_parm "$cfg" "dhcp_boot" "--dhcp-boot"
 800         append_parm "$cfg" "local_ttl" "--local-ttl"
 801         append_parm "$cfg" "pxe_prompt" "--pxe-prompt"
 802         config_list_foreach "$cfg" "pxe_service" append_pxe_service
 803         config_get DOMAIN "$cfg" domain
 804
 805         config_get_bool ADD_LOCAL_DOMAIN "$cfg" add_local_domain 1
 806         config_get_bool ADD_LOCAL_HOSTNAME "$cfg" add_local_hostname 1
 807         config_get ADD_LOCAL_FQDN "$cfg" add_local_fqdn ""
 808         config_get ADD_WAN_FQDN "$cfg" add_wan_fqdn 0
 809
 810         if [ -z "$ADD_LOCAL_FQDN" ] ; then
 811                 # maintain support for previous UCI
 812                 ADD_LOCAL_FQDN="$ADD_LOCAL_HOSTNAME"
 813         fi
 814
 815         config_get_bool readethers "$cfg" readethers
 816         [ "$readethers" = "1" -a \! -e "/etc/ethers" ] && touch /etc/ethers
 817
 818         config_get dhcpscript $cfg dhcpscript
 819
 820         config_get leasefile $cfg leasefile "/tmp/dhcp.leases"
 821         [ -n "$leasefile" -a \! -e "$leasefile" ] && touch "$leasefile"
 822         config_get_bool cachelocal "$cfg" cachelocal 1
 823
 824         config_get_bool noresolv "$cfg" noresolv 0
 825         if [ "$noresolv" != "1" ]; then
 826                 config_get resolvfile "$cfg" resolvfile "/tmp/resolv.conf.auto"
 827                 # So jail doesn't complain if file missing
 828                 [ -n "$resolvfile" -a \! -e "$resolvfile" ] && touch "$resolvfile"
 829         fi
 830
 831         [ -n "$resolvfile" ] && xappend "--resolv-file=$resolvfile"
 832
 833         config_get hostsfile "$cfg" dhcphostsfile
 834         [ -e "$hostsfile" ] && xappend "--dhcp-hostsfile=$hostsfile"
 835
 836         local rebind
 837         config_get_bool rebind "$cfg" rebind_protection 1
 838         [ $rebind -gt 0 ] && {
 839                 log_once \
 840                         "DNS rebinding protection is active," \
 841                         "will discard upstream RFC1918 responses!"
 842                 xappend "--stop-dns-rebind"
 843
 844                 local rebind_localhost
 845                 config_get_bool rebind_localhost "$cfg" rebind_localhost 0
 846                 [ $rebind_localhost -gt 0 ] && {
 847                         log_once "Allowing 127.0.0.0/8 responses"
 848                         xappend "--rebind-localhost-ok"
 849                 }
 850
 851                 append_rebind_domain() {
 852                         log_once "Allowing RFC1918 responses for domain $1"
 853                         xappend "--rebind-domain-ok=$1"
 854                 }
 855
 856                 config_list_foreach "$cfg" rebind_domain append_rebind_domain
 857         }
 858
 859         config_get_bool dnssec "$cfg" dnssec 0
 860         [ "$dnssec" -gt 0 ] && {
 861                 xappend "--conf-file=$TRUSTANCHORSFILE"
 862                 xappend "--dnssec"
 863                 [ -x /etc/init.d/sysntpd ] && {
 864                         /etc/init.d/sysntpd enabled
 865                         [ "$?" -ne 0 -o "$(uci_get system.ntp.enabled)" = "1" ] && {
 866                                 [ -f "$TIMEVALIDFILE" ] || xappend "--dnssec-no-timecheck"
 867                         }
 868                 }
 869                 append_bool "$cfg" dnsseccheckunsigned "--dnssec-check-unsigned"
 870         }
 871
 872         config_get addmac "$cfg" addmac 0
 873         [ "$addmac" != "0" ] && {
 874                 [ "$addmac" = "1" ] && addmac=
 875                 xappend "--add-mac${addmac:+="$addmac"}"
 876         }
 877
 878         dhcp_option_add "$cfg" "" 0
 879
 880         xappend "--dhcp-broadcast=tag:needs-broadcast"
 881
 882         xappend "--addn-hosts=$(dirname $HOSTFILE)"
 883
 884         config_get dnsmasqconfdir "$cfg" confdir "/tmp/dnsmasq.d"
 885         [ ! -d "$dnsmasqconfdir" ] && mkdir -p $dnsmasqconfdir
 886         xappend "--conf-dir=$dnsmasqconfdir"
 887         xappend "--user=dnsmasq"
 888         xappend "--group=dnsmasq"
 889         echo >> $CONFIGFILE_TMP
 890
 891         config_get_bool enable_tftp "$cfg" enable_tftp 0
 892         [ "$enable_tftp" -gt 0 ] && {
 893                 config_get tftp_root "$cfg" tftp_root
 894                 append EXTRA_MOUNT $tftp_root
 895         }
 896
 897         config_foreach filter_dnsmasq host dhcp_host_add "$cfg"
 898         echo >> $CONFIGFILE_TMP
 899         config_foreach filter_dnsmasq boot dhcp_boot_add "$cfg"
 900         config_foreach filter_dnsmasq mac dhcp_mac_add "$cfg"
 901         config_foreach filter_dnsmasq tag dhcp_tag_add "$cfg"
 902         config_foreach filter_dnsmasq vendorclass dhcp_vendorclass_add "$cfg"
 903         config_foreach filter_dnsmasq userclass dhcp_userclass_add "$cfg"
 904         config_foreach filter_dnsmasq circuitid dhcp_circuitid_add "$cfg"
 905         config_foreach filter_dnsmasq remoteid dhcp_remoteid_add "$cfg"
 906         config_foreach filter_dnsmasq subscrid dhcp_subscrid_add "$cfg"
 907         config_foreach filter_dnsmasq match dhcp_match_add "$cfg"
 908         config_foreach filter_dnsmasq domain dhcp_domain_add "$cfg"
 909         config_foreach filter_dnsmasq hostrecord dhcp_hostrecord_add "$cfg"
 910         config_foreach filter_dnsmasq relay dhcp_relay_add "$cfg"
 911
 912         echo >> $CONFIGFILE_TMP
 913         config_foreach filter_dnsmasq srvhost dhcp_srv_add "$cfg"
 914         config_foreach filter_dnsmasq mxhost dhcp_mx_add "$cfg"
 915         echo >> $CONFIGFILE_TMP
 916
 917         config_get_bool boguspriv "$cfg" boguspriv 1
 918         [ "$boguspriv" -gt 0 ] && {
 919                 xappend "--bogus-priv"
 920                 [ -r "$RFC6761FILE" ] && xappend "--conf-file=$RFC6761FILE"
 921         }
 922
 923         if [ "$DNSMASQ_DHCP_VER" -gt 4 ] ; then
 924                 # Enable RA feature for when/if it is constructed,
 925                 # and RA is selected per interface pool (RA, DHCP, or both),
 926                 # but no one (should) want RA broadcast in syslog
 927                 config_foreach filter_dnsmasq dhcp dhcp_add "$cfg"
 928                 xappend "--enable-ra"
 929                 xappend "--quiet-ra"
 930                 append_bool "$cfg" quietdhcp "--quiet-dhcp6"
 931
 932         elif [ "$DNSMASQ_DHCP_VER" -gt 0 ] ; then
 933                 config_foreach filter_dnsmasq dhcp dhcp_add "$cfg"
 934         fi
 935
 936
 937         echo >> $CONFIGFILE_TMP
 938         config_foreach filter_dnsmasq cname dhcp_cname_add "$cfg"
 939         echo >> $CONFIGFILE_TMP
 940
 941         echo >> $CONFIGFILE_TMP
 942         mv -f $CONFIGFILE_TMP $CONFIGFILE
 943
 944         [ "$resolvfile" = "/tmp/resolv.conf.auto" ] && {
 945                 rm -f /tmp/resolv.conf
 946                 [ $ADD_LOCAL_DOMAIN -eq 1 ] && [ -n "$DOMAIN" ] && {
 947                         echo "search $DOMAIN" >> /tmp/resolv.conf
 948                 }
 949                 DNS_SERVERS="$DNS_SERVERS 127.0.0.1"
 950                 for DNS_SERVER in $DNS_SERVERS ; do
 951                         echo "nameserver $DNS_SERVER" >> /tmp/resolv.conf
 952                 done
 953         }
 954
 955         procd_open_instance $cfg
 956         procd_set_param command $PROG -C $CONFIGFILE -k -x /var/run/dnsmasq/dnsmasq."${cfg}".pid
 957         procd_set_param file $CONFIGFILE
 958         procd_set_param respawn
 959
 960         local dnsmasqconffile="/etc/dnsmasq.${cfg}.conf"
 961         if [ ! -r "$dnsmasqconffile" ]; then
 962                 dnsmasqconffile=/etc/dnsmasq.conf
 963         fi
 964
 965         procd_add_jail dnsmasq ubus log
 966         procd_add_jail_mount $CONFIGFILE $TRUSTANCHORSFILE $HOSTFILE $RFC6761FILE /etc/passwd /etc/group /etc/TZ /dev/null /dev/urandom $dnsmasqconffile $dnsmasqconfdir $resolvfile $dhcpscript /etc/hosts /etc/ethers $EXTRA_MOUNT
 967         procd_add_jail_mount_rw /var/run/dnsmasq/ $leasefile
 968
 969         procd_close_instance
 970 }
 971
 972 dnsmasq_stop()
 973 {
 974         local cfg="$1"
 975
 976         config_get resolvfile "$cfg" "resolvfile"
 977
 978         #relink /tmp/resolve.conf only for main instance
 979         [ "$resolvfile" = "/tmp/resolv.conf.auto" ] && {
 980                 [ -f /tmp/resolv.conf ] && {
 981                         rm -f /tmp/resolv.conf
 982                         ln -s "$resolvfile" /tmp/resolv.conf
 983                 }
 984         }
 985
 986         rm -f ${BASEDHCPSTAMPFILE}.${cfg}.*.dhcp
 987 }
 988
 989 service_triggers()
 990 {
 991         procd_add_reload_trigger "dhcp"
 992         procd_add_raw_trigger "interface.*" 2000 /etc/init.d/dnsmasq reload
 993 }
 994
 995 boot()
 996 {
 997         BOOT=1
 998         start "$@"
 999 }
1000
1001 start_service() {
1002         local instance="$1"
1003         local instance_found=0
1004
1005         [ -n "$BOOT" ] && return
1006
1007         . /lib/functions/network.sh
1008
1009         config_cb() {
1010                 local type="$1"
1011                 local name="$2"
1012                 if [ "$type" = "dnsmasq" ]; then
1013                         if [ -n "$instance" -a "$instance" = "$name" ]; then
1014                                 instance_found=1
1015                         fi
1016                 fi
1017         }
1018
1019         config_load dhcp
1020
1021         if [ -n "$instance" ]; then
1022                 [ "$instance_found" -gt 0 ] || return
1023                 dnsmasq_start "$instance"
1024         else
1025                 config_foreach dnsmasq_start dnsmasq
1026         fi
1027 }
1028
1029 reload_service() {
1030         rc_procd start_service "$@"
1031         return 0
1032 }
1033
1034 stop_service() {
1035         local instance="$1"
1036         local instance_found=0
1037
1038         config_cb() {
1039                 local type="$1"
1040                 local name="$2"
1041                 if [ "$type" = "dnsmasq" ]; then
1042                         if [ -n "$instance" -a "$instance" = "$name" ]; then
1043                                 instance_found=1
1044                         fi
1045                 fi
1046         }
1047
1048         config_load dhcp
1049
1050         if [ -n "$instance" ]; then
1051                 [ "$instance_found" -gt 0 ] || return
1052                 dnsmasq_stop "$instance"
1053         else
1054                 config_foreach dnsmasq_stop dnsmasq
1055         fi
1056 }