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