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 "$hostid"
 323         fi
 324
 325         tags=""
 326         if [ -n "$tag" ]; then
 327                 for t in $tag; do append tags "$t" ",set:"; done
 328         fi
 329
 330         config_get_bool broadcast "$cfg" broadcast 0
 331         config_get leasetime "$cfg" leasetime
 332
 333         [ "$broadcast" = "0" ] && broadcast= || broadcast=",set:needs-broadcast"
 334
 335         hosttag="${networkid:+,set:${networkid}}${tags:+,set:${tags}}$broadcast"
 336         nametime="${name:+,$name}${leasetime:+,$leasetime}"
 337
 338         if [ $DNSMASQ_DHCP_VER -eq 6 ]; then
 339                 addrs="${ip:+,$ip}${hostid:+,[::$hostid]}"
 340                 xappend "--dhcp-host=$macs${duids:+,$duids}$hosttag$addrs$nametime"
 341         else
 342                 xappend "--dhcp-host=$macs$hosttag${ip:+,$ip}$nametime"
 343         fi
 344 }
 345
 346 dhcp_this_host_add() {
 347         local net="$1"
 348         local ifname="$2"
 349         local mode="$3"
 350         local routerstub routername ifdashname
 351         local lanaddr lanaddr6 lanaddrs6 ulaprefix
 352
 353         if [ "$mode" -gt 0 ] ; then
 354                 ifdashname="${ifname//./-}"
 355                 routerstub="$( md5sum /etc/os-release )"
 356                 routerstub="router-${routerstub// */}"
 357                 routername="$( uci_get system @system[0] hostname $routerstub )"
 358
 359                 if [ "$mode" -gt 1 ] ; then
 360                         if [ "$mode" -gt 2 ] ; then
 361                                 if [ "$mode" -gt 3 ] ; then
 362                                         append_interface_name "$ifdashname.$routername.$DOMAIN" "$ifname"
 363                                 fi
 364
 365                                 append_interface_name "$routername.$DOMAIN" "$ifname"
 366                         fi
 367
 368                         # All IP addresses discovered by dnsmasq will be labeled (except fe80::)
 369                         append_interface_name "$routername" "$ifname"
 370
 371                 else
 372                         # This uses a static host file entry for only limited addresses.
 373                         # Use dnsmasq option "--expandhosts" to enable FQDN on host files.
 374                         ulaprefix="$(uci_get network @globals[0] ula_prefix)"
 375                         network_get_ipaddr lanaddr "$net"
 376                         network_get_ipaddrs6 lanaddrs6 "$net"
 377
 378                         if [ -n "$lanaddr" ] ; then
 379                                 dhcp_domain_add "" "$routername" "$lanaddr"
 380                         fi
 381
 382                         if [ -n "$ulaprefix" -a -n "$lanaddrs6" ] ; then
 383                                 for lanaddr6 in $lanaddrs6 ; do
 384                                         case "$lanaddr6" in
 385                                         "${ulaprefix%%:/*}"*)
 386                                                 dhcp_domain_add "" "$routername" "$lanaddr6"
 387                                                 ;;
 388                                         esac
 389                                 done
 390                         fi
 391                 fi
 392         fi
 393 }
 394
 395 dhcp_tag_add() {
 396         # NOTE: dnsmasq has explicit "option6:" prefix for DHCPv6 so no collisions
 397         local cfg="$1"
 398
 399         tag="$cfg"
 400
 401         [ -n "$tag" ] || return 0
 402
 403         config_get_bool force "$cfg" force 0
 404         [ "$force" = "0" ] && force=
 405
 406         config_get option "$cfg" dhcp_option
 407         for o in $option; do
 408                 xappend "--dhcp-option${force:+-force}=tag:$tag,$o"
 409         done
 410 }
 411
 412 dhcp_mac_add() {
 413         local cfg="$1"
 414
 415         config_get networkid "$cfg" networkid
 416         [ -n "$networkid" ] || return 0
 417
 418         config_get mac "$cfg" mac
 419         [ -n "$mac" ] || return 0
 420
 421         xappend "--dhcp-mac=$networkid,$mac"
 422
 423         dhcp_option_add "$cfg" "$networkid"
 424 }
 425
 426 dhcp_boot_add() {
 427         # TODO: BOOTURL is different between DHCPv4 and DHCPv6
 428         local cfg="$1"
 429
 430         config_get networkid "$cfg" networkid
 431
 432         config_get filename "$cfg" filename
 433         [ -n "$filename" ] || return 0
 434
 435         config_get servername "$cfg" servername
 436         config_get serveraddress "$cfg" serveraddress
 437
 438         [ -n "$serveraddress" -a ! -n "$servername" ] && return 0
 439
 440         xappend "--dhcp-boot=${networkid:+net:$networkid,}${filename}${servername:+,$servername}${serveraddress:+,$serveraddress}"
 441
 442         config_get_bool force "$cfg" force 0
 443
 444         dhcp_option_add "$cfg" "$networkid" "$force"
 445 }
 446
 447
 448 dhcp_add() {
 449         local cfg="$1"
 450         local dhcp6range="::"
 451         local nettag
 452         local tags
 453
 454         config_get net "$cfg" interface
 455         [ -n "$net" ] || return 0
 456
 457         config_get networkid "$cfg" networkid
 458         [ -n "$networkid" ] || networkid="$net"
 459
 460         network_get_device ifname "$net" || return 0
 461
 462         [ "$cachelocal" = "0" ] && network_get_dnsserver dnsserver "$net" && {
 463                 DNS_SERVERS="$DNS_SERVERS $dnsserver"
 464         }
 465
 466         append_bool "$cfg" ignore "--no-dhcp-interface=$ifname" && {
 467                 # Many ISP do not have useful names for DHCP customers (your WAN).
 468                 dhcp_this_host_add "$net" "$ifname" "$ADD_WAN_FQDN"
 469                 return 0
 470         }
 471
 472         network_get_subnet subnet "$net" || return 0
 473         network_get_protocol proto "$net" || return 0
 474
 475         # Do not support non-static interfaces for now
 476         [ static = "$proto" ] || return 0
 477
 478         # Override interface netmask with dhcp config if applicable
 479         config_get netmask "$cfg" netmask "${subnet##*/}"
 480
 481         #check for an already active dhcp server on the interface, unless 'force' is set
 482         config_get_bool force "$cfg" force 0
 483         [ $force -gt 0 ] || dhcp_check "$ifname" || return 0
 484
 485         config_get start "$cfg" start 100
 486         config_get limit "$cfg" limit 150
 487         config_get leasetime "$cfg" leasetime 12h
 488         config_get options "$cfg" options
 489         config_get_bool dynamicdhcp "$cfg" dynamicdhcp 1
 490
 491         config_get dhcpv4 "$cfg" dhcpv4
 492         config_get dhcpv6 "$cfg" dhcpv6
 493
 494         config_get ra "$cfg" ra
 495         config_get ra_management "$cfg" ra_management
 496         config_get ra_preference "$cfg" ra_preference
 497         config_get dns "$cfg" dns
 498
 499         config_list_foreach "$cfg" "interface_name" append_interface_name "$ifname"
 500
 501         # Put the router host name on this DHCP served interface address(es)
 502         dhcp_this_host_add "$net" "$ifname" "$ADD_LOCAL_FQDN"
 503
 504         start="$( dhcp_calc "$start" )"
 505
 506         add_tag() {
 507                 tags="${tags}tag:$1,"
 508         }
 509         config_list_foreach "$cfg" tag add_tag
 510
 511         nettag="${networkid:+set:${networkid},}"
 512
 513         if [ "$limit" -gt 0 ] ; then
 514                 limit=$((limit-1))
 515         fi
 516
 517         eval "$(ipcalc.sh "${subnet%%/*}" $netmask $start $limit)"
 518
 519         if [ "$dynamicdhcp" = "0" ] ; then
 520                 END="static"
 521                 dhcp6range="::,static"
 522         else
 523                 dhcp6range="::1000,::ffff"
 524         fi
 525
 526
 527         if [ "$dhcpv4" != "disabled" ] ; then
 528                 xappend "--dhcp-range=$tags$nettag$START,$END,$NETMASK,$leasetime${options:+ $options}"
 529         fi
 530
 531
 532         if [ $DNSMASQ_DHCP_VER -eq 6 -a "$ra" = "server" ] ; then
 533                 # Note: dnsmasq cannot just be a DHCPv6 server (all-in-1)
 534                 # and let some other machine(s) send RA pointing to it.
 535
 536                 case $ra_preference in
 537                 *high*)
 538                         xappend "--ra-param=$ifname,high,0,7200"
 539                         ;;
 540                 *low*)
 541                         xappend "--ra-param=$ifname,low,0,7200"
 542                         ;;
 543                 *)
 544                         # Send UNSOLICITED RA at default interval and live for 2 hours.
 545                         # TODO: convert flexible lease time into route life time (only seconds).
 546                         xappend "--ra-param=$ifname,0,7200"
 547                         ;;
 548                 esac
 549
 550                 if [ "$dhcpv6" = "disabled" ] ; then
 551                         ra_management="3"
 552                 fi
 553
 554
 555                 case $ra_management in
 556                 0)
 557                         # SLACC with DCHP for extended options
 558                         xappend "--dhcp-range=$nettag::,constructor:$ifname,ra-stateless,ra-names"
 559                         ;;
 560                 2)
 561                         # DHCP address and RA only for management redirection
 562                         xappend "--dhcp-range=$nettag$dhcp6range,constructor:$ifname,$leasetime"
 563                         ;;
 564                 3)
 565                         # SLAAC only but dnsmasq attempts to link HOSTNAME, DHCPv4 MAC, and SLAAC
 566                         xappend "--dhcp-range=$nettag::,constructor:$ifname,ra-only,ra-names"
 567                         ;;
 568                 *)
 569                         # SLAAC and full DHCP
 570                         xappend "--dhcp-range=$nettag$dhcp6range,constructor:$ifname,slaac,ra-names,$leasetime"
 571                         ;;
 572                 esac
 573
 574                 if [ -n "$dns" ]; then
 575                         dnss=""
 576                         for d in $dns; do append dnss "[$d]" ","; done
 577                 else
 578                         dnss="[::]"
 579                 fi
 580
 581                 dhcp_option_append "option6:dns-server,$dnss" "$networkid"
 582         fi
 583
 584         dhcp_option_add "$cfg" "$networkid" 0
 585         dhcp_option_add "$cfg" "$networkid" 2
 586 }
 587
 588 dhcp_option_append() {
 589         local option="$1"
 590         local networkid="$2"
 591         local force="$3"
 592
 593         xappend "--dhcp-option${force:+-force}=${networkid:+$networkid,}$option"
 594 }
 595
 596 dhcp_option_add() {
 597         # NOTE: dnsmasq has explicit "option6:" prefix for DHCPv6 so no collisions
 598         local cfg="$1"
 599         local networkid="$2"
 600         local force="$3"
 601         local opt="dhcp_option"
 602
 603         [ "$force" = "0" ] && force=
 604         [ "$force" = "2" ] && opt="dhcp_option_force"
 605
 606         local list_len
 607         config_get list_len "$cfg" "${opt}_LENGTH"
 608
 609         if [ -n "$list_len" ]; then
 610                 config_list_foreach "$cfg" "$opt" dhcp_option_append "$networkid" "$force"
 611         else
 612                 config_get dhcp_option "$cfg" "$opt"
 613
 614                 [ -n "$dhcp_option" ] && echo "Warning: the 'option $opt' syntax is deprecated, use 'list $opt'" >&2
 615
 616                 local option
 617                 for option in $dhcp_option; do
 618                         dhcp_option_append "$option" "$networkid" "$force"
 619                 done
 620         fi
 621 }
 622
 623 dhcp_domain_add() {
 624         local cfg="$1"
 625         local ip name names record
 626
 627         config_get names "$cfg" name "$2"
 628         [ -n "$names" ] || return 0
 629
 630         config_get ip "$cfg" ip "$3"
 631         [ -n "$ip" ] || return 0
 632
 633         for name in $names; do
 634                 record="${record:+$record }$name"
 635         done
 636
 637         echo "$ip $record" >> $HOSTFILE
 638 }
 639
 640 dhcp_srv_add() {
 641         local cfg="$1"
 642
 643         config_get srv "$cfg" srv
 644         [ -n "$srv" ] || return 0
 645
 646         config_get target "$cfg" target
 647         [ -n "$target" ] || return 0
 648
 649         config_get port "$cfg" port
 650         [ -n "$port" ] || return 0
 651
 652         config_get class "$cfg" class
 653         config_get weight "$cfg" weight
 654
 655         local service="$srv,$target,$port${class:+,$class${weight:+,$weight}}"
 656
 657         xappend "--srv-host=$service"
 658 }
 659
 660 dhcp_mx_add() {
 661         local cfg="$1"
 662         local domain relay pref
 663
 664         config_get domain "$cfg" domain
 665         [ -n "$domain" ] || return 0
 666
 667         config_get relay "$cfg" relay
 668         [ -n "$relay" ] || return 0
 669
 670         config_get pref "$cfg" pref 0
 671
 672         local service="$domain,$relay,$pref"
 673
 674         xappend "--mx-host=$service"
 675 }
 676
 677 dhcp_cname_add() {
 678         local cfg="$1"
 679         local cname target
 680
 681         config_get cname "$cfg" cname
 682         [ -n "$cname" ] || return 0
 683
 684         config_get target "$cfg" target
 685         [ -n "$target" ] || return 0
 686
 687         xappend "--cname=${cname},${target}"
 688 }
 689
 690 dhcp_hostrecord_add() {
 691         local cfg="$1"
 692         local names addresses record val
 693
 694         config_get names "$cfg" name "$2"
 695         if [ -z "$names" ]; then
 696                 return 0
 697         fi
 698
 699         config_get addresses "$cfg" ip "$3"
 700         if [ -z "$addresses" ]; then
 701                 return 0
 702         fi
 703
 704         for val in $names $addresses; do
 705                 record="${record:+$record,}$val"
 706         done
 707
 708         xappend "--host-record=$record"
 709 }
 710
 711 dhcp_relay_add() {
 712         local cfg="$1"
 713         local local_addr server_addr interface
 714
 715         config_get local_addr "$cfg" local_addr
 716         [ -n "$local_addr" ] || return 0
 717
 718         config_get server_addr "$cfg" server_addr
 719         [ -n "$server_addr" ] || return 0
 720
 721         config_get interface "$cfg" interface
 722         if [ -z "$interface" ]; then
 723                 xappend "--dhcp-relay=$local_addr,$server_addr"
 724         else
 725                 network_get_device ifname "$interface" || return
 726                 xappend "--dhcp-relay=$local_addr,$server_addr,$ifname"
 727         fi
 728 }
 729
 730 dnsmasq_start()
 731 {
 732         local cfg="$1" disabled resolvfile user_dhcpscript
 733
 734         config_get_bool disabled "$cfg" disabled 0
 735         [ "$disabled" -gt 0 ] && return 0
 736
 737         # reset list of DOMAINS and DNS servers (for each dnsmasq instance)
 738         DNS_SERVERS=""
 739         DOMAIN=""
 740         CONFIGFILE="${BASECONFIGFILE}.${cfg}"
 741         CONFIGFILE_TMP="${CONFIGFILE}.$$"
 742         HOSTFILE="${BASEHOSTFILE}.${cfg}"
 743         TIMESTAMPFILE="${BASETIMESTAMPFILE}.${cfg}"
 744         BASEDHCPSTAMPFILE_CFG="${BASEDHCPSTAMPFILE}.${cfg}"
 745
 746         # before we can call xappend
 747         mkdir -p /var/run/dnsmasq/
 748         mkdir -p $(dirname $CONFIGFILE)
 749         mkdir -p $(dirname $HOSTFILE)
 750         mkdir -p /var/lib/misc
 751         chown dnsmasq:dnsmasq /var/run/dnsmasq
 752
 753         [ -f "$TIMESTAMPFILE" ] && rm -f "$TIMESTAMPFILE"
 754
 755         echo "# auto-generated config file from /etc/config/dhcp" > $CONFIGFILE_TMP
 756         echo "# auto-generated config file from /etc/config/dhcp" > $HOSTFILE
 757
 758         # if we did this last, we could override auto-generated config
 759         [ -f /etc/dnsmasq.conf ] && {
 760                 xappend "--conf-file=/etc/dnsmasq.conf"
 761         }
 762
 763         $PROG --version | grep -osqE "^Compile time options:.* DHCPv6( |$)" && DHCPv6CAPABLE=1 || DHCPv6CAPABLE=0
 764
 765
 766         if [ -x /usr/sbin/odhcpd -a -x /etc/init.d/odhcpd ] ; then
 767                 local odhcpd_is_main odhcpd_is_enabled
 768                 config_get odhcpd_is_main odhcpd maindhcp 0
 769                 /etc/init.d/odhcpd enabled && odhcpd_is_enabled=1 || odhcpd_is_enabled=0
 770
 771
 772                 if [ "$odhcpd_is_enabled" -eq 0 -a "$DHCPv6CAPABLE" -eq 1 ] ; then
 773                         # DHCP V4 and V6 in DNSMASQ
 774                         DNSMASQ_DHCP_VER=6
 775                 elif [ "$odhcpd_is_main" -gt 0 ] ; then
 776                         # ODHCPD is doing it all
 777                         DNSMASQ_DHCP_VER=0
 778                 else
 779                         # You have ODHCPD but use DNSMASQ for DHCPV4
 780                         DNSMASQ_DHCP_VER=4
 781                 fi
 782
 783         elif [ "$DHCPv6CAPABLE" -eq 1 ] ; then
 784                 # DHCP V4 and V6 in DNSMASQ
 785                 DNSMASQ_DHCP_VER=6
 786         else
 787                 DNSMASQ_DHCP_VER=4
 788         fi
 789
 790         # Allow DHCP/DHCPv6 to be handled by ISC DHCPD
 791         if [ -x /usr/sbin/dhcpd ] ; then
 792                 if [ -x /etc/init.d/dhcpd ] ; then
 793                         /etc/init.d/dhcpd enabled && DNSMASQ_DHCP_VER=0
 794                 fi
 795                 if [ -x /etc/init.d/dhcpd6 -a "$DNSMASQ_DHCP_VER" -gt 0 ] ; then
 796                         /etc/init.d/dhcpd6 enabled && DNSMASQ_DHCP_VER=4
 797                 fi
 798         fi
 799
 800         append_bool "$cfg" authoritative "--dhcp-authoritative"
 801         append_bool "$cfg" nodaemon "--no-daemon"
 802         append_bool "$cfg" domainneeded "--domain-needed"
 803         append_bool "$cfg" filterwin2k "--filterwin2k"
 804         append_bool "$cfg" nohosts "--no-hosts"
 805         append_bool "$cfg" nonegcache "--no-negcache"
 806         append_bool "$cfg" strictorder "--strict-order"
 807         append_bool "$cfg" logqueries "--log-queries=extra"
 808         append_bool "$cfg" noresolv "--no-resolv"
 809         append_bool "$cfg" localise_queries "--localise-queries"
 810         append_bool "$cfg" readethers "--read-ethers"
 811         append_bool "$cfg" dbus "--enable-dbus"
 812         append_bool "$cfg" expandhosts "--expand-hosts"
 813         config_get tftp_root "$cfg" "tftp_root"
 814         [ -n "$tftp_root" ] && mkdir -p "$tftp_root" && append_bool "$cfg" enable_tftp "--enable-tftp"
 815         append_bool "$cfg" tftp_no_fail "--tftp-no-fail"
 816         append_bool "$cfg" nonwildcard "--bind-dynamic" 1
 817         append_bool "$cfg" fqdn "--dhcp-fqdn"
 818         append_bool "$cfg" proxydnssec "--proxy-dnssec"
 819         append_bool "$cfg" localservice "--local-service"
 820         append_bool "$cfg" logdhcp "--log-dhcp"
 821         append_bool "$cfg" quietdhcp "--quiet-dhcp"
 822         append_bool "$cfg" sequential_ip "--dhcp-sequential-ip"
 823         append_bool "$cfg" allservers "--all-servers"
 824         append_bool "$cfg" noping "--no-ping"
 825
 826         append_parm "$cfg" logfacility "--log-facility"
 827
 828         append_parm "$cfg" cachesize "--cache-size"
 829         append_parm "$cfg" dnsforwardmax "--dns-forward-max"
 830         append_parm "$cfg" port "--port"
 831         append_parm "$cfg" ednspacket_max "--edns-packet-max"
 832         append_parm "$cfg" dhcpleasemax "--dhcp-lease-max"
 833         append_parm "$cfg" "queryport" "--query-port"
 834         append_parm "$cfg" "minport" "--min-port"
 835         append_parm "$cfg" "maxport" "--max-port"
 836         append_parm "$cfg" "domain" "--domain"
 837         append_parm "$cfg" "local" "--server"
 838         config_list_foreach "$cfg" "server" append_server
 839         config_list_foreach "$cfg" "rev_server" append_rev_server
 840         config_list_foreach "$cfg" "address" append_address
 841         config_list_foreach "$cfg" "ipset" append_ipset
 842         config_list_foreach "$cfg" "interface" append_interface
 843         config_list_foreach "$cfg" "notinterface" append_notinterface
 844         config_list_foreach "$cfg" "addnhosts" append_addnhosts
 845         config_list_foreach "$cfg" "bogusnxdomain" append_bogusnxdomain
 846         append_parm "$cfg" "leasefile" "--dhcp-leasefile" "/tmp/dhcp.leases"
 847         append_parm "$cfg" "serversfile" "--servers-file"
 848         append_parm "$cfg" "tftp_root" "--tftp-root"
 849         append_parm "$cfg" "dhcp_boot" "--dhcp-boot"
 850         append_parm "$cfg" "local_ttl" "--local-ttl"
 851         append_parm "$cfg" "pxe_prompt" "--pxe-prompt"
 852         config_list_foreach "$cfg" "pxe_service" append_pxe_service
 853         config_get DOMAIN "$cfg" domain
 854
 855         config_get_bool ADD_LOCAL_DOMAIN "$cfg" add_local_domain 1
 856         config_get_bool ADD_LOCAL_HOSTNAME "$cfg" add_local_hostname 1
 857         config_get ADD_LOCAL_FQDN "$cfg" add_local_fqdn ""
 858         config_get ADD_WAN_FQDN "$cfg" add_wan_fqdn 0
 859
 860         if [ -z "$ADD_LOCAL_FQDN" ] ; then
 861                 # maintain support for previous UCI
 862                 ADD_LOCAL_FQDN="$ADD_LOCAL_HOSTNAME"
 863         fi
 864
 865         config_get_bool readethers "$cfg" readethers
 866         [ "$readethers" = "1" -a \! -e "/etc/ethers" ] && touch /etc/ethers
 867
 868         config_get user_dhcpscript $cfg dhcpscript
 869         if has_handler || [ -n "$user_dhcpscript" ]; then
 870                 xappend "--dhcp-script=$DHCPSCRIPT"
 871         fi
 872
 873         config_get leasefile $cfg leasefile "/tmp/dhcp.leases"
 874         [ -n "$leasefile" -a \! -e "$leasefile" ] && touch "$leasefile"
 875         config_get_bool cachelocal "$cfg" cachelocal 1
 876
 877         config_get_bool noresolv "$cfg" noresolv 0
 878         if [ "$noresolv" != "1" ]; then
 879                 config_get resolvfile "$cfg" resolvfile "/tmp/resolv.conf.auto"
 880                 # So jail doesn't complain if file missing
 881                 [ -n "$resolvfile" -a \! -e "$resolvfile" ] && touch "$resolvfile"
 882         fi
 883
 884         [ -n "$resolvfile" ] && xappend "--resolv-file=$resolvfile"
 885
 886         config_get hostsfile "$cfg" dhcphostsfile
 887         [ -e "$hostsfile" ] && xappend "--dhcp-hostsfile=$hostsfile"
 888
 889         local rebind
 890         config_get_bool rebind "$cfg" rebind_protection 1
 891         [ $rebind -gt 0 ] && {
 892                 log_once \
 893                         "DNS rebinding protection is active," \
 894                         "will discard upstream RFC1918 responses!"
 895                 xappend "--stop-dns-rebind"
 896
 897                 local rebind_localhost
 898                 config_get_bool rebind_localhost "$cfg" rebind_localhost 0
 899                 [ $rebind_localhost -gt 0 ] && {
 900                         log_once "Allowing 127.0.0.0/8 responses"
 901                         xappend "--rebind-localhost-ok"
 902                 }
 903
 904                 append_rebind_domain() {
 905                         log_once "Allowing RFC1918 responses for domain $1"
 906                         xappend "--rebind-domain-ok=$1"
 907                 }
 908
 909                 config_list_foreach "$cfg" rebind_domain append_rebind_domain
 910         }
 911
 912         config_get_bool dnssec "$cfg" dnssec 0
 913         [ "$dnssec" -gt 0 ] && {
 914                 xappend "--conf-file=$TRUSTANCHORSFILE"
 915                 xappend "--dnssec"
 916                 [ -x /etc/init.d/sysntpd ] && {
 917                         /etc/init.d/sysntpd enabled
 918                         [ "$?" -ne 0 -o "$(uci_get system.ntp.enabled)" = "1" ] && {
 919                                 [ -f "$TIMEVALIDFILE" ] || xappend "--dnssec-no-timecheck"
 920                         }
 921                 }
 922                 append_bool "$cfg" dnsseccheckunsigned "--dnssec-check-unsigned"
 923         }
 924
 925         config_get addmac "$cfg" addmac 0
 926         [ "$addmac" != "0" ] && {
 927                 [ "$addmac" = "1" ] && addmac=
 928                 xappend "--add-mac${addmac:+="$addmac"}"
 929         }
 930
 931         dhcp_option_add "$cfg" "" 0
 932         dhcp_option_add "$cfg" "" 2
 933
 934         xappend "--dhcp-broadcast=tag:needs-broadcast"
 935
 936         xappend "--addn-hosts=$(dirname $HOSTFILE)"
 937
 938         config_get dnsmasqconfdir "$cfg" confdir "/tmp/dnsmasq.d"
 939         [ ! -d "$dnsmasqconfdir" ] && mkdir -p $dnsmasqconfdir
 940         xappend "--conf-dir=$dnsmasqconfdir"
 941         xappend "--user=dnsmasq"
 942         xappend "--group=dnsmasq"
 943         echo >> $CONFIGFILE_TMP
 944
 945         config_get_bool enable_tftp "$cfg" enable_tftp 0
 946         [ "$enable_tftp" -gt 0 ] && {
 947                 config_get tftp_root "$cfg" tftp_root
 948                 append EXTRA_MOUNT $tftp_root
 949         }
 950
 951         config_foreach filter_dnsmasq host dhcp_host_add "$cfg"
 952         echo >> $CONFIGFILE_TMP
 953         config_foreach filter_dnsmasq boot dhcp_boot_add "$cfg"
 954         config_foreach filter_dnsmasq mac dhcp_mac_add "$cfg"
 955         config_foreach filter_dnsmasq tag dhcp_tag_add "$cfg"
 956         config_foreach filter_dnsmasq vendorclass dhcp_vendorclass_add "$cfg"
 957         config_foreach filter_dnsmasq userclass dhcp_userclass_add "$cfg"
 958         config_foreach filter_dnsmasq circuitid dhcp_circuitid_add "$cfg"
 959         config_foreach filter_dnsmasq remoteid dhcp_remoteid_add "$cfg"
 960         config_foreach filter_dnsmasq subscrid dhcp_subscrid_add "$cfg"
 961         config_foreach filter_dnsmasq match dhcp_match_add "$cfg"
 962         config_foreach filter_dnsmasq domain dhcp_domain_add "$cfg"
 963         config_foreach filter_dnsmasq hostrecord dhcp_hostrecord_add "$cfg"
 964         config_foreach filter_dnsmasq relay dhcp_relay_add "$cfg"
 965
 966         echo >> $CONFIGFILE_TMP
 967         config_foreach filter_dnsmasq srvhost dhcp_srv_add "$cfg"
 968         config_foreach filter_dnsmasq mxhost dhcp_mx_add "$cfg"
 969         echo >> $CONFIGFILE_TMP
 970
 971         config_get_bool boguspriv "$cfg" boguspriv 1
 972         [ "$boguspriv" -gt 0 ] && {
 973                 xappend "--bogus-priv"
 974                 [ -r "$RFC6761FILE" ] && xappend "--conf-file=$RFC6761FILE"
 975         }
 976
 977         if [ "$DNSMASQ_DHCP_VER" -gt 4 ] ; then
 978                 # Enable RA feature for when/if it is constructed,
 979                 # and RA is selected per interface pool (RA, DHCP, or both),
 980                 # but no one (should) want RA broadcast in syslog
 981                 config_foreach filter_dnsmasq dhcp dhcp_add "$cfg"
 982                 xappend "--enable-ra"
 983                 xappend "--quiet-ra"
 984                 append_bool "$cfg" quietdhcp "--quiet-dhcp6"
 985
 986         elif [ "$DNSMASQ_DHCP_VER" -gt 0 ] ; then
 987                 config_foreach filter_dnsmasq dhcp dhcp_add "$cfg"
 988         fi
 989
 990
 991         echo >> $CONFIGFILE_TMP
 992         config_foreach filter_dnsmasq cname dhcp_cname_add "$cfg"
 993         echo >> $CONFIGFILE_TMP
 994
 995         echo >> $CONFIGFILE_TMP
 996         mv -f $CONFIGFILE_TMP $CONFIGFILE
 997
 998         [ "$resolvfile" = "/tmp/resolv.conf.auto" ] && {
 999                 rm -f /tmp/resolv.conf
1000                 [ $ADD_LOCAL_DOMAIN -eq 1 ] && [ -n "$DOMAIN" ] && {
1001                         echo "search $DOMAIN" >> /tmp/resolv.conf
1002                 }
1003                 DNS_SERVERS="$DNS_SERVERS 127.0.0.1"
1004                 for DNS_SERVER in $DNS_SERVERS ; do
1005                         echo "nameserver $DNS_SERVER" >> /tmp/resolv.conf
1006                 done
1007         }
1008
1009         procd_open_instance $cfg
1010         procd_set_param command $PROG -C $CONFIGFILE -k -x /var/run/dnsmasq/dnsmasq."${cfg}".pid
1011         procd_set_param file $CONFIGFILE
1012         [ -n "$user_dhcpscript" ] && procd_set_param env USER_DHCPSCRIPT="$user_dhcpscript"
1013         procd_set_param respawn
1014
1015         local dnsmasqconffile="/etc/dnsmasq.${cfg}.conf"
1016         if [ ! -r "$dnsmasqconffile" ]; then
1017                 dnsmasqconffile=/etc/dnsmasq.conf
1018         fi
1019
1020         procd_add_jail dnsmasq ubus log
1021         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
1022         procd_add_jail_mount_rw /var/run/dnsmasq/ $leasefile
1023
1024         procd_close_instance
1025 }
1026
1027 dnsmasq_stop()
1028 {
1029         local cfg="$1"
1030
1031         config_get resolvfile "$cfg" "resolvfile"
1032
1033         #relink /tmp/resolve.conf only for main instance
1034         [ "$resolvfile" = "/tmp/resolv.conf.auto" ] && {
1035                 [ -f /tmp/resolv.conf ] && {
1036                         rm -f /tmp/resolv.conf
1037                         ln -s "$resolvfile" /tmp/resolv.conf
1038                 }
1039         }
1040
1041         rm -f ${BASEDHCPSTAMPFILE}.${cfg}.*.dhcp
1042 }
1043
1044 service_triggers()
1045 {
1046         procd_add_reload_trigger "dhcp"
1047         procd_add_raw_trigger "interface.*" 2000 /etc/init.d/dnsmasq reload
1048 }
1049
1050 boot()
1051 {
1052         BOOT=1
1053         start "$@"
1054 }
1055
1056 start_service() {
1057         local instance="$1"
1058         local instance_found=0
1059
1060         [ -n "$BOOT" ] && return
1061
1062         . /lib/functions/network.sh
1063
1064         config_cb() {
1065                 local type="$1"
1066                 local name="$2"
1067                 if [ "$type" = "dnsmasq" ]; then
1068                         if [ -n "$instance" -a "$instance" = "$name" ]; then
1069                                 instance_found=1
1070                         fi
1071                 fi
1072         }
1073
1074         config_load dhcp
1075
1076         if [ -n "$instance" ]; then
1077                 [ "$instance_found" -gt 0 ] || return
1078                 dnsmasq_start "$instance"
1079         else
1080                 config_foreach dnsmasq_start dnsmasq
1081         fi
1082 }
1083
1084 reload_service() {
1085         rc_procd start_service "$@"
1086         return 0
1087 }
1088
1089 stop_service() {
1090         local instance="$1"
1091         local instance_found=0
1092
1093         config_cb() {
1094                 local type="$1"
1095                 local name="$2"
1096                 if [ "$type" = "dnsmasq" ]; then
1097                         if [ -n "$instance" -a "$instance" = "$name" ]; then
1098                                 instance_found=1
1099                         fi
1100                 fi
1101         }
1102
1103         config_load dhcp
1104
1105         if [ -n "$instance" ]; then
1106                 [ "$instance_found" -gt 0 ] || return
1107                 dnsmasq_stop "$instance"
1108         else
1109                 config_foreach dnsmasq_stop dnsmasq
1110         fi
1111 }