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_notinterface() {
 146         network_get_device ifname "$1" || ifname="$1"
 147         xappend "--except-interface=$ifname"
 148 }
 149
 150 append_addnhosts() {
 151         xappend "--addn-hosts=$1"
 152 }
 153
 154 append_bogusnxdomain() {
 155         xappend "--bogus-nxdomain=$1"
 156 }
 157
 158 append_pxe_service() {
 159         xappend "--pxe-service=$1"
 160 }
 161
 162 append_interface_name() {
 163         xappend "--interface-name=$1,$2"
 164 }
 165
 166 filter_dnsmasq() {
 167         local cfg="$1" func="$2" match_cfg="$3" found_cfg
 168
 169         # use entry when no instance entry set, or if it matches
 170         config_get found_cfg "$cfg" "instance"
 171         if [ -z "$found_cfg" -o "$found_cfg" = "$match_cfg" ]; then
 172                 $func $cfg
 173         fi
 174 }
 175
 176 dhcp_subscrid_add() {
 177         local cfg="$1"
 178
 179         config_get networkid "$cfg" networkid
 180         [ -n "$networkid" ] || return 0
 181
 182         config_get subscriberid "$cfg" subscriberid
 183         [ -n "$subscriberid" ] || return 0
 184
 185         xappend "--dhcp-subscrid=$networkid,$subscriberid"
 186
 187         config_get_bool force "$cfg" force 0
 188
 189         dhcp_option_add "$cfg" "$networkid" "$force"
 190 }
 191
 192 dhcp_remoteid_add() {
 193         local cfg="$1"
 194
 195         config_get networkid "$cfg" networkid
 196         [ -n "$networkid" ] || return 0
 197
 198         config_get remoteid "$cfg" remoteid
 199         [ -n "$remoteid" ] || return 0
 200
 201         xappend "--dhcp-remoteid=$networkid,$remoteid"
 202
 203         config_get_bool force "$cfg" force 0
 204
 205         dhcp_option_add "$cfg" "$networkid" "$force"
 206 }
 207
 208 dhcp_circuitid_add() {
 209         # TODO: DHCPV6 does not have circuitid; catch "option6:"
 210         local cfg="$1"
 211
 212         config_get networkid "$cfg" networkid
 213         [ -n "$networkid" ] || return 0
 214
 215         config_get circuitid "$cfg" circuitid
 216         [ -n "$circuitid" ] || return 0
 217
 218         xappend "--dhcp-circuitid=$networkid,$circuitid"
 219
 220         config_get_bool force "$cfg" force 0
 221
 222         dhcp_option_add "$cfg" "$networkid" "$force"
 223 }
 224
 225 dhcp_userclass_add() {
 226         local cfg="$1"
 227
 228         config_get networkid "$cfg" networkid
 229         [ -n "$networkid" ] || return 0
 230
 231         config_get userclass "$cfg" userclass
 232         [ -n "$userclass" ] || return 0
 233
 234         xappend "--dhcp-userclass=$networkid,$userclass"
 235
 236         config_get_bool force "$cfg" force 0
 237
 238         dhcp_option_add "$cfg" "$networkid" "$force"
 239 }
 240
 241 dhcp_vendorclass_add() {
 242         # TODO: DHCPV6 vendor class has stricter definitions; catch? fixup?
 243         local cfg="$1"
 244
 245         config_get networkid "$cfg" networkid
 246         [ -n "$networkid" ] || return 0
 247
 248         config_get vendorclass "$cfg" vendorclass
 249         [ -n "$vendorclass" ] || return 0
 250
 251         xappend "--dhcp-vendorclass=$networkid,$vendorclass"
 252
 253         config_get_bool force "$cfg" force 0
 254
 255         dhcp_option_add "$cfg" "$networkid" "$force"
 256 }
 257
 258 dhcp_match_add() {
 259         local cfg="$1"
 260
 261         config_get networkid "$cfg" networkid
 262         [ -n "$networkid" ] || return 0
 263
 264         config_get match "$cfg" match
 265         [ -n "$match" ] || return 0
 266
 267         xappend "--dhcp-match=$networkid,$match"
 268
 269         config_get_bool force "$cfg" force 0
 270
 271         dhcp_option_add "$cfg" "$networkid" "$force"
 272 }
 273
 274 dhcp_host_add() {
 275         local cfg="$1"
 276         local hosttag nametime addrs duids
 277
 278         config_get_bool force "$cfg" force 0
 279
 280         config_get networkid "$cfg" networkid
 281         [ -n "$networkid" ] && dhcp_option_add "$cfg" "$networkid" "$force"
 282
 283         config_get_bool enable "$cfg" enable 1
 284         [ "$enable" = "0" ] && return 0
 285
 286         config_get name "$cfg" name
 287         config_get ip "$cfg" ip
 288         config_get hostid "$cfg" hostid
 289
 290         [ -n "$ip" -o -n "$name" -o -n "$hostid" ] || return 0
 291
 292         config_get_bool dns "$cfg" dns 0
 293         [ "$dns" = "1" -a -n "$ip" -a -n "$name" ] && {
 294                 echo "$ip $name${DOMAIN:+.$DOMAIN}" >> $HOSTFILE
 295         }
 296
 297         config_get mac "$cfg" mac
 298         config_get duid "$cfg" duid
 299         config_get tag "$cfg" tag
 300
 301         if [ -n "$mac" ]; then
 302                 # --dhcp-host=00:20:e0:3b:13:af,192.168.0.199,lap
 303                 # many MAC are possible to track a laptop ON/OFF dock
 304                 macs=""
 305                 for m in $mac; do append macs "$m" ","; done
 306         fi
 307
 308         if [ $DNSMASQ_DHCP_VER -eq 6 -a -n "$duid" ]; then
 309                 # --dhcp-host=id:00:03:00:01:12:00:00:01:02:03,[::beef],lap
 310                 # one (virtual) machine gets one DUID per RFC3315
 311                 duids="id:${duid// */}"
 312         fi
 313
 314         if [ -z "$macs" -a -z "$duids" ]; then
 315                 # --dhcp-host=lap,192.168.0.199,[::beef]
 316                 [ -n "$name" ] || return 0
 317                 macs="$name"
 318                 name=""
 319         fi
 320
 321         if [ -n "$hostid" ]; then
 322                         hex_to_hostid hostid "$hostid"
 323         fi
 324
 325         config_get_bool broadcast "$cfg" broadcast 0
 326         config_get leasetime "$cfg" leasetime
 327
 328         [ "$broadcast" = "0" ] && broadcast= || broadcast=",set:needs-broadcast"
 329
 330         hosttag="${networkid:+,set:${networkid}}${tag:+,set:${tag}}$broadcast"
 331         nametime="${name:+,$name}${leasetime:+,$leasetime}"
 332
 333         if [ $DNSMASQ_DHCP_VER -eq 6 ]; then
 334                 addrs="${ip:+,$ip}${hostid:+,[::$hostid]}"
 335                 xappend "--dhcp-host=$macs${duids:+,$duids}$hosttag$addrs$nametime"
 336         else
 337                 xappend "--dhcp-host=$macs$hosttag${ip:+,$ip}$nametime"
 338         fi
 339 }
 340
 341 dhcp_this_host_add() {
 342         local net="$1"
 343         local ifname="$2"
 344         local mode="$3"
 345         local routerstub routername ifdashname
 346         local lanaddr lanaddr6 lanaddrs6 ulaprefix
 347
 348         if [ "$mode" -gt 0 ] ; then
 349                 ifdashname="${ifname//./-}"
 350                 routerstub="$( md5sum /etc/os-release )"
 351                 routerstub="router-${routerstub// */}"
 352                 routername="$( uci_get system @system[0] hostname $routerstub )"
 353
 354                 if [ "$mode" -gt 1 ] ; then
 355                         if [ "$mode" -gt 2 ] ; then
 356                                 if [ "$mode" -gt 3 ] ; then
 357                                         append_interface_name "$ifdashname.$routername.$DOMAIN" "$ifname"
 358                                 fi
 359
 360                                 append_interface_name "$routername.$DOMAIN" "$ifname"
 361                         fi
 362
 363                         # All IP addresses discovered by dnsmasq will be labeled (except fe80::)
 364                         append_interface_name "$routername" "$ifname"
 365
 366                 else
 367                         # This uses a static host file entry for only limited addresses.
 368                         # Use dnsmasq option "--expandhosts" to enable FQDN on host files.
 369                         ulaprefix="$(uci_get network @globals[0] ula_prefix)"
 370                         network_get_ipaddr lanaddr "$net"
 371                         network_get_ipaddrs6 lanaddrs6 "$net"
 372
 373                         if [ -n "$lanaddr" ] ; then
 374                                 dhcp_domain_add "" "$routername" "$lanaddr"
 375                         fi
 376
 377                         if [ -n "$ulaprefix" -a -n "$lanaddrs6" ] ; then
 378                                 for lanaddr6 in $lanaddrs6 ; do
 379                                         case "$lanaddr6" in
 380                                         "${ulaprefix%%:/*}"*)
 381                                                         dhcp_domain_add "" "$routername" "$lanaddr6"
 382                                                         ;;
 383                                         esac
 384                                 done
 385                         fi
 386                 fi
 387         fi
 388 }
 389
 390 dhcp_tag_add() {
 391         # NOTE: dnsmasq has explicit "option6:" prefix for DHCPv6 so no collisions
 392         local cfg="$1"
 393
 394         tag="$cfg"
 395
 396         [ -n "$tag" ] || return 0
 397
 398         config_get_bool force "$cfg" force 0
 399         [ "$force" = "0" ] && force=
 400
 401         config_get option "$cfg" dhcp_option
 402         for o in $option; do
 403                 xappend "--dhcp-option${force:+-force}=tag:$tag,$o"
 404         done
 405 }
 406
 407 dhcp_mac_add() {
 408         local cfg="$1"
 409
 410         config_get networkid "$cfg" networkid
 411         [ -n "$networkid" ] || return 0
 412
 413         config_get mac "$cfg" mac
 414         [ -n "$mac" ] || return 0
 415
 416         xappend "--dhcp-mac=$networkid,$mac"
 417
 418         dhcp_option_add "$cfg" "$networkid"
 419 }
 420
 421 dhcp_boot_add() {
 422         # TODO: BOOTURL is different between DHCPv4 and DHCPv6
 423         local cfg="$1"
 424
 425         config_get networkid "$cfg" networkid
 426
 427         config_get filename "$cfg" filename
 428         [ -n "$filename" ] || return 0
 429
 430         config_get servername "$cfg" servername
 431         config_get serveraddress "$cfg" serveraddress
 432
 433         [ -n "$serveraddress" -a ! -n "$servername" ] && return 0
 434
 435         xappend "--dhcp-boot=${networkid:+net:$networkid,}${filename}${servername:+,$servername}${serveraddress:+,$serveraddress}"
 436
 437         config_get_bool force "$cfg" force 0
 438
 439         dhcp_option_add "$cfg" "$networkid" "$force"
 440 }
 441
 442
 443 dhcp_add() {
 444         local cfg="$1"
 445         local dhcp6range="::"
 446         local nettag
 447         local tags
 448
 449         config_get net "$cfg" interface
 450         [ -n "$net" ] || return 0
 451
 452         config_get networkid "$cfg" networkid
 453         [ -n "$networkid" ] || networkid="$net"
 454
 455         network_get_subnet subnet "$net" || return 0
 456         network_get_device ifname "$net" || return 0
 457         network_get_protocol proto "$net" || return 0
 458
 459         [ "$cachelocal" = "0" ] && network_get_dnsserver dnsserver "$net" && {
 460                 DNS_SERVERS="$DNS_SERVERS $dnsserver"
 461         }
 462
 463         append_bool "$cfg" ignore "--no-dhcp-interface=$ifname" && {
 464                 # Many ISP do not have useful names for DHCP customers (your WAN).
 465                 dhcp_this_host_add "$net" "$ifname" "$ADD_WAN_FQDN"
 466                 return 0
 467         }
 468
 469         # Do not support non-static interfaces for now
 470         [ static = "$proto" ] || return 0
 471
 472         # Override interface netmask with dhcp config if applicable
 473         config_get netmask "$cfg" netmask "${subnet##*/}"
 474
 475         #check for an already active dhcp server on the interface, unless 'force' is set
 476         config_get_bool force "$cfg" force 0
 477         [ $force -gt 0 ] || dhcp_check "$ifname" || return 0
 478
 479         config_get start "$cfg" start 100
 480         config_get limit "$cfg" limit 150
 481         config_get leasetime "$cfg" leasetime 12h
 482         config_get options "$cfg" options
 483         config_get_bool dynamicdhcp "$cfg" dynamicdhcp 1
 484
 485         config_get dhcpv4 "$cfg" dhcpv4
 486         config_get dhcpv6 "$cfg" dhcpv6
 487
 488         config_get ra "$cfg" ra
 489         config_get ra_management "$cfg" ra_management
 490         config_get ra_preference "$cfg" ra_preference
 491         config_get dns "$cfg" dns
 492
 493         config_list_foreach "$cfg" "interface_name" append_interface_name "$ifname"
 494
 495         # Put the router host name on this DHCP served interface address(es)
 496         dhcp_this_host_add "$net" "$ifname" "$ADD_LOCAL_FQDN"
 497
 498         start="$( dhcp_calc "$start" )"
 499
 500         add_tag() {
 501                 tags="${tags}tag:$1,"
 502         }
 503         config_list_foreach "$cfg" tag add_tag
 504
 505         nettag="${networkid:+set:${networkid},}"
 506
 507         if [ "$limit" -gt 0 ] ; then
 508                 limit=$((limit-1))
 509         fi
 510
 511         eval "$(ipcalc.sh "${subnet%%/*}" $netmask $start $limit)"
 512
 513         if [ "$dynamicdhcp" = "0" ] ; then
 514                 END="static"
 515                 dhcp6range="::,static"
 516         else
 517                 dhcp6range="::1000,::ffff"
 518         fi
 519
 520
 521         if [ "$dhcpv4" != "disabled" ] ; then
 522                 xappend "--dhcp-range=$tags$nettag$START,$END,$NETMASK,$leasetime${options:+ $options}"
 523         fi
 524
 525
 526         if [ $DNSMASQ_DHCP_VER -eq 6 -a "$ra" = "server" ] ; then
 527                 # Note: dnsmasq cannot just be a DHCPv6 server (all-in-1)
 528                 # and let some other machine(s) send RA pointing to it.
 529
 530                 case $ra_preference in
 531                 *high*)
 532                         xappend "--ra-param=$ifname,high,0,7200"
 533                         ;;
 534                 *low*)
 535                         xappend "--ra-param=$ifname,low,0,7200"
 536                         ;;
 537                 *)
 538                         # Send UNSOLICITED RA at default interval and live for 2 hours.
 539                         # TODO: convert flexible lease time into route life time (only seconds).
 540                         xappend "--ra-param=$ifname,0,7200"
 541                         ;;
 542                 esac
 543
 544                 if [ "$dhcpv6" = "disabled" ] ; then
 545                         ra_management="3"
 546                 fi
 547
 548
 549                 case $ra_management in
 550                 0)
 551                         # SLACC with DCHP for extended options
 552                         xappend "--dhcp-range=$nettag::,constructor:$ifname,ra-stateless,ra-names"
 553                         ;;
 554                 2)
 555                         # DHCP address and RA only for management redirection
 556                         xappend "--dhcp-range=$nettag$dhcp6range,constructor:$ifname,$leasetime"
 557                         ;;
 558                 3)
 559                         # SLAAC only but dnsmasq attempts to link HOSTNAME, DHCPv4 MAC, and SLAAC
 560                         xappend "--dhcp-range=$nettag::,constructor:$ifname,ra-only,ra-names"
 561                         ;;
 562                 *)
 563                         # SLAAC and full DHCP
 564                         xappend "--dhcp-range=$nettag$dhcp6range,constructor:$ifname,slaac,ra-names,$leasetime"
 565                         ;;
 566                 esac
 567
 568                 if [ -n "$dns" ]; then
 569                         dnss=""
 570                         for d in $dns; do append dnss "[$d]" ","; done
 571                 else
 572                         dnss="[::]"
 573                 fi
 574
 575                 dhcp_option_append "option6:dns-server,$dnss" "$networkid"
 576         fi
 577
 578         dhcp_option_add "$cfg" "$networkid" 0
 579         dhcp_option_add "$cfg" "$networkid" 2
 580 }
 581
 582 dhcp_option_append() {
 583         local option="$1"
 584         local networkid="$2"
 585         local force="$3"
 586
 587         xappend "--dhcp-option${force:+-force}=${networkid:+$networkid,}$option"
 588 }
 589
 590 dhcp_option_add() {
 591         # NOTE: dnsmasq has explicit "option6:" prefix for DHCPv6 so no collisions
 592         local cfg="$1"
 593         local networkid="$2"
 594         local force="$3"
 595         local opt="dhcp_option"
 596
 597         [ "$force" = "0" ] && force=
 598         [ "$force" = "2" ] && opt="dhcp_option_force"
 599
 600         local list_len
 601         config_get list_len "$cfg" "${opt}_LENGTH"
 602
 603         if [ -n "$list_len" ]; then
 604                 config_list_foreach "$cfg" "$opt" dhcp_option_append "$networkid" "$force"
 605         else
 606                 config_get dhcp_option "$cfg" "$opt"
 607
 608                 [ -n "$dhcp_option" ] && echo "Warning: the 'option $opt' syntax is deprecated, use 'list $opt'" >&2
 609
 610                 local option
 611                 for option in $dhcp_option; do
 612                         dhcp_option_append "$option" "$networkid" "$force"
 613                 done
 614         fi
 615 }
 616
 617 dhcp_domain_add() {
 618         local cfg="$1"
 619         local ip name names record
 620
 621         config_get names "$cfg" name "$2"
 622         [ -n "$names" ] || return 0
 623
 624         config_get ip "$cfg" ip "$3"
 625         [ -n "$ip" ] || return 0
 626
 627         for name in $names; do
 628                 record="${record:+$record }$name"
 629         done
 630
 631         echo "$ip $record" >> $HOSTFILE
 632 }
 633
 634 dhcp_srv_add() {
 635         local cfg="$1"
 636
 637         config_get srv "$cfg" srv
 638         [ -n "$srv" ] || return 0
 639
 640         config_get target "$cfg" target
 641         [ -n "$target" ] || return 0
 642
 643         config_get port "$cfg" port
 644         [ -n "$port" ] || return 0
 645
 646         config_get class "$cfg" class
 647         config_get weight "$cfg" weight
 648
 649         local service="$srv,$target,$port${class:+,$class${weight:+,$weight}}"
 650
 651         xappend "--srv-host=$service"
 652 }
 653
 654 dhcp_mx_add() {
 655         local cfg="$1"
 656         local domain relay pref
 657
 658         config_get domain "$cfg" domain
 659         [ -n "$domain" ] || return 0
 660
 661         config_get relay "$cfg" relay
 662         [ -n "$relay" ] || return 0
 663
 664         config_get pref "$cfg" pref 0
 665
 666         local service="$domain,$relay,$pref"
 667
 668         xappend "--mx-host=$service"
 669 }
 670
 671 dhcp_cname_add() {
 672         local cfg="$1"
 673         local cname target
 674
 675         config_get cname "$cfg" cname
 676         [ -n "$cname" ] || return 0
 677
 678         config_get target "$cfg" target
 679         [ -n "$target" ] || return 0
 680
 681         xappend "--cname=${cname},${target}"
 682 }
 683
 684 dhcp_hostrecord_add() {
 685         local cfg="$1"
 686         local names addresses record val
 687
 688         config_get names "$cfg" name "$2"
 689         if [ -z "$names" ]; then
 690                 return 0
 691         fi
 692
 693         config_get addresses "$cfg" ip "$3"
 694         if [ -z "$addresses" ]; then
 695                 return 0
 696         fi
 697
 698         for val in $names $addresses; do
 699                 record="${record:+$record,}$val"
 700         done
 701
 702         xappend "--host-record=$record"
 703 }
 704
 705 dhcp_relay_add() {
 706         local cfg="$1"
 707         local local_addr server_addr interface
 708
 709         config_get local_addr "$cfg" local_addr
 710         [ -n "$local_addr" ] || return 0
 711
 712         config_get server_addr "$cfg" server_addr
 713         [ -n "$server_addr" ] || return 0
 714
 715         config_get interface "$cfg" interface
 716         if [ -z "$interface" ]; then
 717                 xappend "--dhcp-relay=$local_addr,$server_addr"
 718         else
 719                 network_get_device ifname "$interface" || return
 720                 xappend "--dhcp-relay=$local_addr,$server_addr,$ifname"
 721         fi
 722 }
 723
 724 dnsmasq_start()
 725 {
 726         local cfg="$1" disabled resolvfile user_dhcpscript
 727
 728         config_get_bool disabled "$cfg" disabled 0
 729         [ "$disabled" -gt 0 ] && return 0
 730
 731         # reset list of DOMAINS and DNS servers (for each dnsmasq instance)
 732         DNS_SERVERS=""
 733         DOMAIN=""
 734         CONFIGFILE="${BASECONFIGFILE}.${cfg}"
 735         CONFIGFILE_TMP="${CONFIGFILE}.$$"
 736         HOSTFILE="${BASEHOSTFILE}.${cfg}"
 737         TIMESTAMPFILE="${BASETIMESTAMPFILE}.${cfg}"
 738         BASEDHCPSTAMPFILE_CFG="${BASEDHCPSTAMPFILE}.${cfg}"
 739
 740         # before we can call xappend
 741         mkdir -p /var/run/dnsmasq/
 742         mkdir -p $(dirname $CONFIGFILE)
 743         mkdir -p $(dirname $HOSTFILE)
 744         mkdir -p /var/lib/misc
 745         chown dnsmasq:dnsmasq /var/run/dnsmasq
 746
 747         [ -f "$TIMESTAMPFILE" ] && rm -f "$TIMESTAMPFILE"
 748
 749         echo "# auto-generated config file from /etc/config/dhcp" > $CONFIGFILE_TMP
 750         echo "# auto-generated config file from /etc/config/dhcp" > $HOSTFILE
 751
 752         # if we did this last, we could override auto-generated config
 753         [ -f /etc/dnsmasq.conf ] && {
 754                 xappend "--conf-file=/etc/dnsmasq.conf"
 755         }
 756
 757         $PROG --version | grep -osqE "^Compile time options:.* DHCPv6( |$)" && DHCPv6CAPABLE=1 || DHCPv6CAPABLE=0
 758
 759
 760         if [ -x /usr/sbin/odhcpd -a -x /etc/init.d/odhcpd ] ; then
 761                 local odhcpd_is_main odhcpd_is_enabled
 762                 config_get odhcpd_is_main odhcpd maindhcp 0
 763                 /etc/init.d/odhcpd enabled && odhcpd_is_enabled=1 || odhcpd_is_enabled=0
 764
 765
 766                 if [ "$odhcpd_is_enabled" -eq 0 -a "$DHCPv6CAPABLE" -eq 1 ] ; then
 767                         # DHCP V4 and V6 in DNSMASQ
 768                         DNSMASQ_DHCP_VER=6
 769                 elif [ "$odhcpd_is_main" -gt 0 ] ; then
 770                         # ODHCPD is doing it all
 771                         DNSMASQ_DHCP_VER=0
 772                 else
 773                         # You have ODHCPD but use DNSMASQ for DHCPV4
 774                         DNSMASQ_DHCP_VER=4
 775                 fi
 776
 777         elif [ "$DHCPv6CAPABLE" -eq 1 ] ; then
 778                 # DHCP V4 and V6 in DNSMASQ
 779                 DNSMASQ_DHCP_VER=6
 780         else
 781                 DNSMASQ_DHCP_VER=4
 782         fi
 783
 784         # Allow DHCP/DHCPv6 to be handled by ISC DHCPD
 785         if [ -x /usr/sbin/dhcpd ] ; then
 786                 if [ -x /etc/init.d/dhcpd ] ; then
 787                         /etc/init.d/dhcpd enabled && DNSMASQ_DHCP_VER=0
 788                 fi
 789                 if [ -x /etc/init.d/dhcpd6 -a "$DNSMASQ_DHCP_VER" -gt 0 ] ; then
 790                         /etc/init.d/dhcpd6 enabled && DNSMASQ_DHCP_VER=4
 791                 fi
 792         fi
 793
 794         append_bool "$cfg" authoritative "--dhcp-authoritative"
 795         append_bool "$cfg" nodaemon "--no-daemon"
 796         append_bool "$cfg" domainneeded "--domain-needed"
 797         append_bool "$cfg" filterwin2k "--filterwin2k"
 798         append_bool "$cfg" nohosts "--no-hosts"
 799         append_bool "$cfg" nonegcache "--no-negcache"
 800         append_bool "$cfg" strictorder "--strict-order"
 801         append_bool "$cfg" logqueries "--log-queries=extra"
 802         append_bool "$cfg" noresolv "--no-resolv"
 803         append_bool "$cfg" localise_queries "--localise-queries"
 804         append_bool "$cfg" readethers "--read-ethers"
 805         append_bool "$cfg" dbus "--enable-dbus"
 806         append_bool "$cfg" expandhosts "--expand-hosts"
 807         config_get tftp_root "$cfg" "tftp_root"
 808         [ -n "$tftp_root" ] && mkdir -p "$tftp_root" && append_bool "$cfg" enable_tftp "--enable-tftp"
 809         append_bool "$cfg" tftp_no_fail "--tftp-no-fail"
 810         append_bool "$cfg" nonwildcard "--bind-dynamic" 1
 811         append_bool "$cfg" fqdn "--dhcp-fqdn"
 812         append_bool "$cfg" proxydnssec "--proxy-dnssec"
 813         append_bool "$cfg" localservice "--local-service"
 814         append_bool "$cfg" logdhcp "--log-dhcp"
 815         append_bool "$cfg" quietdhcp "--quiet-dhcp"
 816         append_bool "$cfg" sequential_ip "--dhcp-sequential-ip"
 817         append_bool "$cfg" allservers "--all-servers"
 818         append_bool "$cfg" noping "--no-ping"
 819
 820         append_parm "$cfg" logfacility "--log-facility"
 821
 822         append_parm "$cfg" cachesize "--cache-size"
 823         append_parm "$cfg" dnsforwardmax "--dns-forward-max"
 824         append_parm "$cfg" port "--port"
 825         append_parm "$cfg" ednspacket_max "--edns-packet-max"
 826         append_parm "$cfg" dhcpleasemax "--dhcp-lease-max"
 827         append_parm "$cfg" "queryport" "--query-port"
 828         append_parm "$cfg" "minport" "--min-port"
 829         append_parm "$cfg" "maxport" "--max-port"
 830         append_parm "$cfg" "domain" "--domain"
 831         append_parm "$cfg" "local" "--server"
 832         config_list_foreach "$cfg" "server" append_server
 833         config_list_foreach "$cfg" "rev_server" append_rev_server
 834         config_list_foreach "$cfg" "address" append_address
 835         config_list_foreach "$cfg" "ipset" append_ipset
 836         config_list_foreach "$cfg" "interface" append_interface
 837         config_list_foreach "$cfg" "notinterface" append_notinterface
 838         config_list_foreach "$cfg" "addnhosts" append_addnhosts
 839         config_list_foreach "$cfg" "bogusnxdomain" append_bogusnxdomain
 840         append_parm "$cfg" "leasefile" "--dhcp-leasefile" "/tmp/dhcp.leases"
 841         append_parm "$cfg" "serversfile" "--servers-file"
 842         append_parm "$cfg" "tftp_root" "--tftp-root"
 843         append_parm "$cfg" "dhcp_boot" "--dhcp-boot"
 844         append_parm "$cfg" "local_ttl" "--local-ttl"
 845         append_parm "$cfg" "pxe_prompt" "--pxe-prompt"
 846         config_list_foreach "$cfg" "pxe_service" append_pxe_service
 847         config_get DOMAIN "$cfg" domain
 848
 849         config_get_bool ADD_LOCAL_DOMAIN "$cfg" add_local_domain 1
 850         config_get_bool ADD_LOCAL_HOSTNAME "$cfg" add_local_hostname 1
 851         config_get ADD_LOCAL_FQDN "$cfg" add_local_fqdn ""
 852         config_get ADD_WAN_FQDN "$cfg" add_wan_fqdn 0
 853
 854         if [ -z "$ADD_LOCAL_FQDN" ] ; then
 855                 # maintain support for previous UCI
 856                 ADD_LOCAL_FQDN="$ADD_LOCAL_HOSTNAME"
 857         fi
 858
 859         config_get_bool readethers "$cfg" readethers
 860         [ "$readethers" = "1" -a \! -e "/etc/ethers" ] && touch /etc/ethers
 861
 862         config_get user_dhcpscript $cfg dhcpscript
 863         if has_handler || [ -n "$user_dhcpscript" ]; then
 864                 xappend "--dhcp-script=$DHCPSCRIPT"
 865         fi
 866
 867         config_get leasefile $cfg leasefile "/tmp/dhcp.leases"
 868         [ -n "$leasefile" -a \! -e "$leasefile" ] && touch "$leasefile"
 869         config_get_bool cachelocal "$cfg" cachelocal 1
 870
 871         config_get_bool noresolv "$cfg" noresolv 0
 872         if [ "$noresolv" != "1" ]; then
 873                 config_get resolvfile "$cfg" resolvfile "/tmp/resolv.conf.auto"
 874                 # So jail doesn't complain if file missing
 875                 [ -n "$resolvfile" -a \! -e "$resolvfile" ] && touch "$resolvfile"
 876         fi
 877
 878         [ -n "$resolvfile" ] && xappend "--resolv-file=$resolvfile"
 879
 880         config_get hostsfile "$cfg" dhcphostsfile
 881         [ -e "$hostsfile" ] && xappend "--dhcp-hostsfile=$hostsfile"
 882
 883         local rebind
 884         config_get_bool rebind "$cfg" rebind_protection 1
 885         [ $rebind -gt 0 ] && {
 886                 log_once \
 887                         "DNS rebinding protection is active," \
 888                         "will discard upstream RFC1918 responses!"
 889                 xappend "--stop-dns-rebind"
 890
 891                 local rebind_localhost
 892                 config_get_bool rebind_localhost "$cfg" rebind_localhost 0
 893                 [ $rebind_localhost -gt 0 ] && {
 894                         log_once "Allowing 127.0.0.0/8 responses"
 895                         xappend "--rebind-localhost-ok"
 896                 }
 897
 898                 append_rebind_domain() {
 899                         log_once "Allowing RFC1918 responses for domain $1"
 900                         xappend "--rebind-domain-ok=$1"
 901                 }
 902
 903                 config_list_foreach "$cfg" rebind_domain append_rebind_domain
 904         }
 905
 906         config_get_bool dnssec "$cfg" dnssec 0
 907         [ "$dnssec" -gt 0 ] && {
 908                 xappend "--conf-file=$TRUSTANCHORSFILE"
 909                 xappend "--dnssec"
 910                 [ -x /etc/init.d/sysntpd ] && {
 911                         /etc/init.d/sysntpd enabled
 912                         [ "$?" -ne 0 -o "$(uci_get system.ntp.enabled)" = "1" ] && {
 913                                 [ -f "$TIMEVALIDFILE" ] || xappend "--dnssec-no-timecheck"
 914                         }
 915                 }
 916                 append_bool "$cfg" dnsseccheckunsigned "--dnssec-check-unsigned"
 917         }
 918
 919         config_get addmac "$cfg" addmac 0
 920         [ "$addmac" != "0" ] && {
 921                 [ "$addmac" = "1" ] && addmac=
 922                 xappend "--add-mac${addmac:+="$addmac"}"
 923         }
 924
 925         dhcp_option_add "$cfg" "" 0
 926         dhcp_option_add "$cfg" "" 2
 927
 928         xappend "--dhcp-broadcast=tag:needs-broadcast"
 929
 930         xappend "--addn-hosts=$(dirname $HOSTFILE)"
 931
 932         config_get dnsmasqconfdir "$cfg" confdir "/tmp/dnsmasq.d"
 933         [ ! -d "$dnsmasqconfdir" ] && mkdir -p $dnsmasqconfdir
 934         xappend "--conf-dir=$dnsmasqconfdir"
 935         xappend "--user=dnsmasq"
 936         xappend "--group=dnsmasq"
 937         echo >> $CONFIGFILE_TMP
 938
 939         config_get_bool enable_tftp "$cfg" enable_tftp 0
 940         [ "$enable_tftp" -gt 0 ] && {
 941                 config_get tftp_root "$cfg" tftp_root
 942                 append EXTRA_MOUNT $tftp_root
 943         }
 944
 945         config_foreach filter_dnsmasq host dhcp_host_add "$cfg"
 946         echo >> $CONFIGFILE_TMP
 947         config_foreach filter_dnsmasq boot dhcp_boot_add "$cfg"
 948         config_foreach filter_dnsmasq mac dhcp_mac_add "$cfg"
 949         config_foreach filter_dnsmasq tag dhcp_tag_add "$cfg"
 950         config_foreach filter_dnsmasq vendorclass dhcp_vendorclass_add "$cfg"
 951         config_foreach filter_dnsmasq userclass dhcp_userclass_add "$cfg"
 952         config_foreach filter_dnsmasq circuitid dhcp_circuitid_add "$cfg"
 953         config_foreach filter_dnsmasq remoteid dhcp_remoteid_add "$cfg"
 954         config_foreach filter_dnsmasq subscrid dhcp_subscrid_add "$cfg"
 955         config_foreach filter_dnsmasq match dhcp_match_add "$cfg"
 956         config_foreach filter_dnsmasq domain dhcp_domain_add "$cfg"
 957         config_foreach filter_dnsmasq hostrecord dhcp_hostrecord_add "$cfg"
 958         config_foreach filter_dnsmasq relay dhcp_relay_add "$cfg"
 959
 960         echo >> $CONFIGFILE_TMP
 961         config_foreach filter_dnsmasq srvhost dhcp_srv_add "$cfg"
 962         config_foreach filter_dnsmasq mxhost dhcp_mx_add "$cfg"
 963         echo >> $CONFIGFILE_TMP
 964
 965         config_get_bool boguspriv "$cfg" boguspriv 1
 966         [ "$boguspriv" -gt 0 ] && {
 967                 xappend "--bogus-priv"
 968                 [ -r "$RFC6761FILE" ] && xappend "--conf-file=$RFC6761FILE"
 969         }
 970
 971         if [ "$DNSMASQ_DHCP_VER" -gt 4 ] ; then
 972                 # Enable RA feature for when/if it is constructed,
 973                 # and RA is selected per interface pool (RA, DHCP, or both),
 974                 # but no one (should) want RA broadcast in syslog
 975                 config_foreach filter_dnsmasq dhcp dhcp_add "$cfg"
 976                 xappend "--enable-ra"
 977                 xappend "--quiet-ra"
 978                 append_bool "$cfg" quietdhcp "--quiet-dhcp6"
 979
 980         elif [ "$DNSMASQ_DHCP_VER" -gt 0 ] ; then
 981                 config_foreach filter_dnsmasq dhcp dhcp_add "$cfg"
 982         fi
 983
 984
 985         echo >> $CONFIGFILE_TMP
 986         config_foreach filter_dnsmasq cname dhcp_cname_add "$cfg"
 987         echo >> $CONFIGFILE_TMP
 988
 989         echo >> $CONFIGFILE_TMP
 990         mv -f $CONFIGFILE_TMP $CONFIGFILE
 991
 992         [ "$resolvfile" = "/tmp/resolv.conf.auto" ] && {
 993                 rm -f /tmp/resolv.conf
 994                 [ $ADD_LOCAL_DOMAIN -eq 1 ] && [ -n "$DOMAIN" ] && {
 995                         echo "search $DOMAIN" >> /tmp/resolv.conf
 996                 }
 997                 DNS_SERVERS="$DNS_SERVERS 127.0.0.1"
 998                 for DNS_SERVER in $DNS_SERVERS ; do
 999                         echo "nameserver $DNS_SERVER" >> /tmp/resolv.conf
1000                 done
1001         }
1002
1003         procd_open_instance $cfg
1004         procd_set_param command $PROG -C $CONFIGFILE -k -x /var/run/dnsmasq/dnsmasq."${cfg}".pid
1005         procd_set_param file $CONFIGFILE
1006         [ -n "$user_dhcpscript" ] && procd_set_param env USER_DHCPSCRIPT="$user_dhcpscript"
1007         procd_set_param respawn
1008
1009         local dnsmasqconffile="/etc/dnsmasq.${cfg}.conf"
1010         if [ ! -r "$dnsmasqconffile" ]; then
1011                 dnsmasqconffile=/etc/dnsmasq.conf
1012         fi
1013
1014         procd_add_jail dnsmasq ubus log
1015         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
1016         procd_add_jail_mount_rw /var/run/dnsmasq/ $leasefile
1017
1018         procd_close_instance
1019 }
1020
1021 dnsmasq_stop()
1022 {
1023         local cfg="$1"
1024
1025         config_get resolvfile "$cfg" "resolvfile"
1026
1027         #relink /tmp/resolve.conf only for main instance
1028         [ "$resolvfile" = "/tmp/resolv.conf.auto" ] && {
1029                 [ -f /tmp/resolv.conf ] && {
1030                         rm -f /tmp/resolv.conf
1031                         ln -s "$resolvfile" /tmp/resolv.conf
1032                 }
1033         }
1034
1035         rm -f ${BASEDHCPSTAMPFILE}.${cfg}.*.dhcp
1036 }
1037
1038 service_triggers()
1039 {
1040         procd_add_reload_trigger "dhcp"
1041         procd_add_raw_trigger "interface.*" 2000 /etc/init.d/dnsmasq reload
1042 }
1043
1044 boot()
1045 {
1046         BOOT=1
1047         start "$@"
1048 }
1049
1050 start_service() {
1051         local instance="$1"
1052         local instance_found=0
1053
1054         [ -n "$BOOT" ] && return
1055
1056         . /lib/functions/network.sh
1057
1058         config_cb() {
1059                 local type="$1"
1060                 local name="$2"
1061                 if [ "$type" = "dnsmasq" ]; then
1062                         if [ -n "$instance" -a "$instance" = "$name" ]; then
1063                                 instance_found=1
1064                         fi
1065                 fi
1066         }
1067
1068         config_load dhcp
1069
1070         if [ -n "$instance" ]; then
1071                 [ "$instance_found" -gt 0 ] || return
1072                 dnsmasq_start "$instance"
1073         else
1074                 config_foreach dnsmasq_start dnsmasq
1075         fi
1076 }
1077
1078 reload_service() {
1079         rc_procd start_service "$@"
1080         return 0
1081 }
1082
1083 stop_service() {
1084         local instance="$1"
1085         local instance_found=0
1086
1087         config_cb() {
1088                 local type="$1"
1089                 local name="$2"
1090                 if [ "$type" = "dnsmasq" ]; then
1091                         if [ -n "$instance" -a "$instance" = "$name" ]; then
1092                                 instance_found=1
1093                         fi
1094                 fi
1095         }
1096
1097         config_load dhcp
1098
1099         if [ -n "$instance" ]; then
1100                 [ "$instance_found" -gt 0 ] || return
1101                 dnsmasq_stop "$instance"
1102         else
1103                 config_foreach dnsmasq_stop dnsmasq
1104         fi
1105 }