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_address() {
 129         xappend "--address=$1"
 130 }
 131
 132 append_ipset() {
 133         xappend "--ipset=$1"
 134 }
 135
 136 append_interface() {
 137         network_get_device ifname "$1" || return
 138         xappend "--interface=$ifname"
 139 }
 140
 141 append_notinterface() {
 142         network_get_device ifname "$1" || return
 143         xappend "--except-interface=$ifname"
 144 }
 145
 146 append_addnhosts() {
 147         xappend "--addn-hosts=$1"
 148 }
 149
 150 append_bogusnxdomain() {
 151         xappend "--bogus-nxdomain=$1"
 152 }
 153
 154 append_pxe_service() {
 155         xappend "--pxe-service=$1"
 156 }
 157
 158 append_interface_name() {
 159         xappend "--interface-name=$1,$2"
 160 }
 161
 162 filter_dnsmasq() {
 163         local cfg="$1" func="$2" match_cfg="$3" found_cfg
 164
 165         # use entry when no instance entry set, or if it matches
 166         config_get found_cfg "$cfg" "instance"
 167         if [ -z "$found_cfg" -o "$found_cfg" = "$match_cfg" ]; then
 168                 $func $cfg
 169         fi
 170 }
 171
 172 dhcp_subscrid_add() {
 173         local cfg="$1"
 174
 175         config_get networkid "$cfg" networkid
 176         [ -n "$networkid" ] || return 0
 177
 178         config_get subscriberid "$cfg" subscriberid
 179         [ -n "$subscriberid" ] || return 0
 180
 181         xappend "--dhcp-subscrid=$networkid,$subscriberid"
 182
 183         config_get_bool force "$cfg" force 0
 184
 185         dhcp_option_add "$cfg" "$networkid" "$force"
 186 }
 187
 188 dhcp_remoteid_add() {
 189         local cfg="$1"
 190
 191         config_get networkid "$cfg" networkid
 192         [ -n "$networkid" ] || return 0
 193
 194         config_get remoteid "$cfg" remoteid
 195         [ -n "$remoteid" ] || return 0
 196
 197         xappend "--dhcp-remoteid=$networkid,$remoteid"
 198
 199         config_get_bool force "$cfg" force 0
 200
 201         dhcp_option_add "$cfg" "$networkid" "$force"
 202 }
 203
 204 dhcp_circuitid_add() {
 205         # TODO: DHCPV6 does not have circuitid; catch "option6:"
 206         local cfg="$1"
 207
 208         config_get networkid "$cfg" networkid
 209         [ -n "$networkid" ] || return 0
 210
 211         config_get circuitid "$cfg" circuitid
 212         [ -n "$circuitid" ] || return 0
 213
 214         xappend "--dhcp-circuitid=$networkid,$circuitid"
 215
 216         config_get_bool force "$cfg" force 0
 217
 218         dhcp_option_add "$cfg" "$networkid" "$force"
 219 }
 220
 221 dhcp_userclass_add() {
 222         local cfg="$1"
 223
 224         config_get networkid "$cfg" networkid
 225         [ -n "$networkid" ] || return 0
 226
 227         config_get userclass "$cfg" userclass
 228         [ -n "$userclass" ] || return 0
 229
 230         xappend "--dhcp-userclass=$networkid,$userclass"
 231
 232         config_get_bool force "$cfg" force 0
 233
 234         dhcp_option_add "$cfg" "$networkid" "$force"
 235 }
 236
 237 dhcp_vendorclass_add() {
 238         # TODO: DHCPV6 vendor class has stricter definitions; catch? fixup?
 239         local cfg="$1"
 240
 241         config_get networkid "$cfg" networkid
 242         [ -n "$networkid" ] || return 0
 243
 244         config_get vendorclass "$cfg" vendorclass
 245         [ -n "$vendorclass" ] || return 0
 246
 247         xappend "--dhcp-vendorclass=$networkid,$vendorclass"
 248
 249         config_get_bool force "$cfg" force 0
 250
 251         dhcp_option_add "$cfg" "$networkid" "$force"
 252 }
 253
 254 dhcp_match_add() {
 255         local cfg="$1"
 256
 257         config_get networkid "$cfg" networkid
 258         [ -n "$networkid" ] || return 0
 259
 260         config_get match "$cfg" match
 261         [ -n "$match" ] || return 0
 262
 263         xappend "--dhcp-match=$networkid,$match"
 264
 265         config_get_bool force "$cfg" force 0
 266
 267         dhcp_option_add "$cfg" "$networkid" "$force"
 268 }
 269
 270 dhcp_host_add() {
 271         local cfg="$1"
 272         local hosttag nametime addrs duids
 273
 274         config_get_bool force "$cfg" force 0
 275
 276         config_get networkid "$cfg" networkid
 277         [ -n "$networkid" ] && dhcp_option_add "$cfg" "$networkid" "$force"
 278
 279         config_get_bool enable "$cfg" enable 1
 280         [ "$enable" = "0" ] && return 0
 281
 282         config_get name "$cfg" name
 283         config_get ip "$cfg" ip
 284         config_get hostid "$cfg" hostid
 285
 286         [ -n "$ip" -o -n "$name" -o -n "$hostid" ] || return 0
 287
 288         config_get_bool dns "$cfg" dns 0
 289         [ "$dns" = "1" -a -n "$ip" -a -n "$name" ] && {
 290                 echo "$ip $name${DOMAIN:+.$DOMAIN}" >> $HOSTFILE
 291         }
 292
 293         config_get mac "$cfg" mac
 294         config_get duid "$cfg" duid
 295         config_get tag "$cfg" tag
 296
 297         if [ -n "$mac" ]; then
 298                 # --dhcp-host=00:20:e0:3b:13:af,192.168.0.199,lap
 299                 # many MAC are possible to track a laptop ON/OFF dock
 300                 macs=""
 301                 for m in $mac; do append macs "$m" ","; done
 302         fi
 303
 304         if [ $DNSMASQ_DHCP_VER -eq 6 -a -n "$duid" ]; then
 305                 # --dhcp-host=id:00:03:00:01:12:00:00:01:02:03,[::beef],lap
 306                 # one (virtual) machine gets one DUID per RFC3315
 307                 duids="id:${duid// */}"
 308         fi
 309
 310         if [ -z "$macs" -a -z "$duids" ]; then
 311                 # --dhcp-host=lap,192.168.0.199,[::beef]
 312                 [ -n "$name" ] || return 0
 313                 macs="$name"
 314                 name=""
 315         fi
 316
 317         if [ -n "$hostid" ]; then
 318                         hex_to_hostid hostid "$hostid"
 319         fi
 320
 321         config_get_bool broadcast "$cfg" broadcast 0
 322         config_get leasetime "$cfg" leasetime
 323
 324         [ "$broadcast" = "0" ] && broadcast= || broadcast=",set:needs-broadcast"
 325
 326         hosttag="${networkid:+,set:${networkid}}${tag:+,set:${tag}}$broadcast"
 327         nametime="${name:+,$name}${leasetime:+,$leasetime}"
 328
 329         if [ $DNSMASQ_DHCP_VER -eq 6 ]; then
 330                 addrs="${ip:+,$ip}${hostid:+,[::$hostid]}"
 331                 xappend "--dhcp-host=$macs${duids:+,$duids}$hosttag$addrs$nametime"
 332         else
 333                 xappend "--dhcp-host=$macs$hosttag${ip:+,$ip}$nametime"
 334         fi
 335 }
 336
 337 dhcp_this_host_add() {
 338         local net="$1"
 339         local ifname="$2"
 340         local mode="$3"
 341         local routerstub routername ifdashname
 342         local lanaddr lanaddr6 lanaddrs6 ulaprefix
 343
 344         if [ "$mode" -gt 0 ] ; then
 345                 ifdashname="${ifname//./-}"
 346                 routerstub="$( md5sum /etc/os-release )"
 347                 routerstub="router-${routerstub// */}"
 348                 routername="$( uci_get system @system[0] hostname $routerstub )"
 349
 350                 if [ "$mode" -gt 1 ] ; then
 351                         if [ "$mode" -gt 2 ] ; then
 352                                 if [ "$mode" -gt 3 ] ; then
 353                                         append_interface_name "$ifdashname.$routername.$DOMAIN" "$ifname"
 354                                 fi
 355
 356                                 append_interface_name "$routername.$DOMAIN" "$ifname"
 357                         fi
 358
 359                         # All IP addresses discovered by dnsmasq will be labeled (except fe80::)
 360                         append_interface_name "$routername" "$ifname"
 361
 362                 else
 363                         # This uses a static host file entry for only limited addresses.
 364                         # Use dnsmasq option "--expandhosts" to enable FQDN on host files.
 365                         ulaprefix="$(uci_get network @globals[0] ula_prefix)"
 366                         network_get_ipaddr lanaddr "$net"
 367                         network_get_ipaddrs6 lanaddrs6 "$net"
 368
 369                         if [ -n "$lanaddr" ] ; then
 370                                 dhcp_domain_add "" "$routername" "$lanaddr"
 371                         fi
 372
 373                         if [ -n "$ulaprefix" -a -n "$lanaddrs6" ] ; then
 374                                 for lanaddr6 in $lanaddrs6 ; do
 375                                         case "$lanaddr6" in
 376                                         "${ulaprefix%%:/*}"*)
 377                                                         dhcp_domain_add "" "$routername" "$lanaddr6"
 378                                                         ;;
 379                                         esac
 380                                 done
 381                         fi
 382                 fi
 383         fi
 384 }
 385
 386 dhcp_tag_add() {
 387         # NOTE: dnsmasq has explicit "option6:" prefix for DHCPv6 so no collisions
 388         local cfg="$1"
 389
 390         tag="$cfg"
 391
 392         [ -n "$tag" ] || return 0
 393
 394         config_get_bool force "$cfg" force 0
 395         [ "$force" = "0" ] && force=
 396
 397         config_get option "$cfg" dhcp_option
 398         for o in $option; do
 399                 xappend "--dhcp-option${force:+-force}=tag:$tag,$o"
 400         done
 401 }
 402
 403 dhcp_mac_add() {
 404         local cfg="$1"
 405
 406         config_get networkid "$cfg" networkid
 407         [ -n "$networkid" ] || return 0
 408
 409         config_get mac "$cfg" mac
 410         [ -n "$mac" ] || return 0
 411
 412         xappend "--dhcp-mac=$networkid,$mac"
 413
 414         dhcp_option_add "$cfg" "$networkid"
 415 }
 416
 417 dhcp_boot_add() {
 418         # TODO: BOOTURL is different between DHCPv4 and DHCPv6
 419         local cfg="$1"
 420
 421         config_get networkid "$cfg" networkid
 422
 423         config_get filename "$cfg" filename
 424         [ -n "$filename" ] || return 0
 425
 426         config_get servername "$cfg" servername
 427         config_get serveraddress "$cfg" serveraddress
 428
 429         [ -n "$serveraddress" -a ! -n "$servername" ] && return 0
 430
 431         xappend "--dhcp-boot=${networkid:+net:$networkid,}${filename}${servername:+,$servername}${serveraddress:+,$serveraddress}"
 432
 433         config_get_bool force "$cfg" force 0
 434
 435         dhcp_option_add "$cfg" "$networkid" "$force"
 436 }
 437
 438
 439 dhcp_add() {
 440         local cfg="$1"
 441         local dhcp6range="::"
 442         local nettag
 443
 444         config_get net "$cfg" interface
 445         [ -n "$net" ] || return 0
 446
 447         config_get networkid "$cfg" networkid
 448         [ -n "$networkid" ] || networkid="$net"
 449
 450         network_get_subnet subnet "$net" || return 0
 451         network_get_device ifname "$net" || return 0
 452         network_get_protocol proto "$net" || return 0
 453
 454         [ "$cachelocal" = "0" ] && network_get_dnsserver dnsserver "$net" && {
 455                 DNS_SERVERS="$DNS_SERVERS $dnsserver"
 456         }
 457
 458         append_bool "$cfg" ignore "--no-dhcp-interface=$ifname" && {
 459                 # Many ISP do not have useful names for DHCP customers (your WAN).
 460                 dhcp_this_host_add "$net" "$ifname" "$ADD_WAN_FQDN"
 461                 return 0
 462         }
 463
 464         # Do not support non-static interfaces for now
 465         [ static = "$proto" ] || return 0
 466
 467         # Override interface netmask with dhcp config if applicable
 468         config_get netmask "$cfg" netmask "${subnet##*/}"
 469
 470         #check for an already active dhcp server on the interface, unless 'force' is set
 471         config_get_bool force "$cfg" force 0
 472         [ $force -gt 0 ] || dhcp_check "$ifname" || return 0
 473
 474         config_get start "$cfg" start 100
 475         config_get limit "$cfg" limit 150
 476         config_get leasetime "$cfg" leasetime 12h
 477         config_get options "$cfg" options
 478         config_get_bool dynamicdhcp "$cfg" dynamicdhcp 1
 479
 480         config_get dhcpv4 "$cfg" dhcpv4
 481         config_get dhcpv6 "$cfg" dhcpv6
 482
 483         config_get ra "$cfg" ra
 484         config_get ra_management "$cfg" ra_management
 485         config_get ra_preference "$cfg" ra_preference
 486         config_get dns "$cfg" dns
 487
 488         config_list_foreach "$cfg" "interface_name" append_interface_name "$ifname"
 489
 490         # Put the router host name on this DHCP served interface address(es)
 491         dhcp_this_host_add "$net" "$ifname" "$ADD_LOCAL_FQDN"
 492
 493         start="$( dhcp_calc "$start" )"
 494         nettag="${networkid:+set:${networkid},}"
 495
 496         if [ "$limit" -gt 0 ] ; then
 497                 limit=$((limit-1))
 498         fi
 499
 500         eval "$(ipcalc.sh "${subnet%%/*}" $netmask $start $limit)"
 501
 502         if [ "$dynamicdhcp" = "0" ] ; then
 503                 END="static"
 504                 dhcp6range="::,static"
 505         else
 506                 dhcp6range="::1000,::ffff"
 507         fi
 508
 509
 510         if [ "$dhcpv4" != "disabled" ] ; then
 511                 xappend "--dhcp-range=$nettag$START,$END,$NETMASK,$leasetime${options:+ $options}"
 512         fi
 513
 514
 515         if [ $DNSMASQ_DHCP_VER -eq 6 -a "$ra" = "server" ] ; then
 516                 # Note: dnsmasq cannot just be a DHCPv6 server (all-in-1)
 517                 # and let some other machine(s) send RA pointing to it.
 518
 519                 case $ra_preference in
 520                 *high*)
 521                         xappend "--ra-param=$ifname,high,0,7200"
 522                         ;;
 523                 *low*)
 524                         xappend "--ra-param=$ifname,low,0,7200"
 525                         ;;
 526                 *)
 527                         # Send UNSOLICITED RA at default interval and live for 2 hours.
 528                         # TODO: convert flexible lease time into route life time (only seconds).
 529                         xappend "--ra-param=$ifname,0,7200"
 530                         ;;
 531                 esac
 532
 533                 if [ "$dhcpv6" = "disabled" ] ; then
 534                         ra_management="3"
 535                 fi
 536
 537
 538                 case $ra_management in
 539                 0)
 540                         # SLACC with DCHP for extended options
 541                         xappend "--dhcp-range=$nettag::,constructor:$ifname,ra-stateless,ra-names"
 542                         ;;
 543                 2)
 544                         # DHCP address and RA only for management redirection
 545                         xappend "--dhcp-range=$nettag$dhcp6range,constructor:$ifname,$leasetime"
 546                         ;;
 547                 3)
 548                         # SLAAC only but dnsmasq attempts to link HOSTNAME, DHCPv4 MAC, and SLAAC
 549                         xappend "--dhcp-range=$nettag::,constructor:$ifname,ra-only,ra-names"
 550                         ;;
 551                 *)
 552                         # SLAAC and full DHCP
 553                         xappend "--dhcp-range=$nettag$dhcp6range,constructor:$ifname,slaac,ra-names,$leasetime"
 554                         ;;
 555                 esac
 556
 557                 if [ -n "$dns" ]; then
 558                         dnss=""
 559                         for d in $dns; do append dnss "[$d]" ","; done
 560                 else
 561                         dnss="[::]"
 562                 fi
 563
 564                 dhcp_option_append "option6:dns-server,$dnss" "$networkid"
 565         fi
 566
 567         dhcp_option_add "$cfg" "$networkid"
 568 }
 569
 570 dhcp_option_append() {
 571         local option="$1"
 572         local networkid="$2"
 573         local force="$3"
 574
 575         xappend "--dhcp-option${force:+-force}=${networkid:+$networkid,}$option"
 576 }
 577
 578 dhcp_option_add() {
 579         # NOTE: dnsmasq has explicit "option6:" prefix for DHCPv6 so no collisions
 580         local cfg="$1"
 581         local networkid="$2"
 582         local force="$3"
 583
 584         [ "$force" = "0" ] && force=
 585
 586         local list_len
 587         config_get list_len "$cfg" dhcp_option_LENGTH
 588
 589         if [ -n "$list_len" ]; then
 590                 config_list_foreach "$cfg" dhcp_option dhcp_option_append "$networkid" "$force"
 591         else
 592                 config_get dhcp_option "$cfg" dhcp_option
 593
 594                 [ -n "$dhcp_option" ] && echo "Warning: the 'option dhcp_option' syntax is deprecated, use 'list dhcp_option'" >&2
 595
 596                 local option
 597                 for option in $dhcp_option; do
 598                         dhcp_option_append "$option" "$networkid" "$force"
 599                 done
 600         fi
 601 }
 602
 603 dhcp_domain_add() {
 604         local cfg="$1"
 605         local ip name names record
 606
 607         config_get names "$cfg" name "$2"
 608         [ -n "$names" ] || return 0
 609
 610         config_get ip "$cfg" ip "$3"
 611         [ -n "$ip" ] || return 0
 612
 613         for name in $names; do
 614                 record="${record:+$record }$name"
 615         done
 616
 617         echo "$ip $record" >> $HOSTFILE
 618 }
 619
 620 dhcp_srv_add() {
 621         local cfg="$1"
 622
 623         config_get srv "$cfg" srv
 624         [ -n "$srv" ] || return 0
 625
 626         config_get target "$cfg" target
 627         [ -n "$target" ] || return 0
 628
 629         config_get port "$cfg" port
 630         [ -n "$port" ] || return 0
 631
 632         config_get class "$cfg" class
 633         config_get weight "$cfg" weight
 634
 635         local service="$srv,$target,$port${class:+,$class${weight:+,$weight}}"
 636
 637         xappend "--srv-host=$service"
 638 }
 639
 640 dhcp_mx_add() {
 641         local cfg="$1"
 642         local domain relay pref
 643
 644         config_get domain "$cfg" domain
 645         [ -n "$domain" ] || return 0
 646
 647         config_get relay "$cfg" relay
 648         [ -n "$relay" ] || return 0
 649
 650         config_get pref "$cfg" pref 0
 651
 652         local service="$domain,$relay,$pref"
 653
 654         xappend "--mx-host=$service"
 655 }
 656
 657 dhcp_cname_add() {
 658         local cfg="$1"
 659         local cname target
 660
 661         config_get cname "$cfg" cname
 662         [ -n "$cname" ] || return 0
 663
 664         config_get target "$cfg" target
 665         [ -n "$target" ] || return 0
 666
 667         xappend "--cname=${cname},${target}"
 668 }
 669
 670 dhcp_hostrecord_add() {
 671         local cfg="$1"
 672         local names addresses record val
 673
 674         config_get names "$cfg" name "$2"
 675         if [ -z "$names" ]; then
 676                 return 0
 677         fi
 678
 679         config_get addresses "$cfg" ip "$3"
 680         if [ -z "$addresses" ]; then
 681                 return 0
 682         fi
 683
 684         for val in $names $addresses; do
 685                 record="${record:+$record,}$val"
 686         done
 687
 688         xappend "--host-record=$record"
 689 }
 690
 691 dhcp_relay_add() {
 692         local cfg="$1"
 693         local local_addr server_addr interface
 694
 695         config_get local_addr "$cfg" local_addr
 696         [ -n "$local_addr" ] || return 0
 697
 698         config_get server_addr "$cfg" server_addr
 699         [ -n "$server_addr" ] || return 0
 700
 701         config_get interface "$cfg" interface
 702         if [ -z "$interface" ]; then
 703                 xappend "--dhcp-relay=$local_addr,$server_addr"
 704         else
 705                 network_get_device ifname "$interface" || return
 706                 xappend "--dhcp-relay=$local_addr,$server_addr,$ifname"
 707         fi
 708 }
 709
 710 dnsmasq_ismain()
 711 {
 712         local cfg="$1"
 713         local port notinterfaces
 714
 715         config_get port "$cfg" port "53"
 716         [ $port = "53" ] || return 1
 717
 718         config_get notinterfaces "$cfg" notinterface ""
 719         [ -n $notinterfaces ] && list_contains $notinterfaces "loopback" || return 1
 720
 721         # dnsmasq instance is designated to listen on 127.0.0.1#53.
 722         return 0
 723 }
 724
 725 dnsmasq_start()
 726 {
 727         local cfg="$1" disabled resolvfile user_dhcpscript
 728
 729         config_get_bool disabled "$cfg" disabled 0
 730         [ "$disabled" -gt 0 ] && return 0
 731
 732         # reset list of DOMAINS and DNS servers (for each dnsmasq instance)
 733         DNS_SERVERS=""
 734         DOMAIN=""
 735         CONFIGFILE="${BASECONFIGFILE}.${cfg}"
 736         CONFIGFILE_TMP="${CONFIGFILE}.$$"
 737         HOSTFILE="${BASEHOSTFILE}.${cfg}"
 738         TIMESTAMPFILE="${BASETIMESTAMPFILE}.${cfg}"
 739         BASEDHCPSTAMPFILE_CFG="${BASEDHCPSTAMPFILE}.${cfg}"
 740
 741         # before we can call xappend
 742         mkdir -p /var/run/dnsmasq/
 743         mkdir -p $(dirname $CONFIGFILE)
 744         mkdir -p $(dirname $HOSTFILE)
 745         mkdir -p /var/lib/misc
 746         chown dnsmasq:dnsmasq /var/run/dnsmasq
 747
 748         [ -f "$TIMESTAMPFILE" ] && rm -f "$TIMESTAMPFILE"
 749
 750         echo "# auto-generated config file from /etc/config/dhcp" > $CONFIGFILE_TMP
 751         echo "# auto-generated config file from /etc/config/dhcp" > $HOSTFILE
 752
 753         # if we did this last, we could override auto-generated config
 754         [ -f /etc/dnsmasq.conf ] && {
 755                 xappend "--conf-file=/etc/dnsmasq.conf"
 756         }
 757
 758         $PROG --version | grep -osqE "^Compile time options:.* DHCPv6( |$)" && DHCPv6CAPABLE=1 || DHCPv6CAPABLE=0
 759
 760
 761         if [ -x /usr/sbin/odhcpd -a -x /etc/init.d/odhcpd ] ; then
 762                 local odhcpd_is_main odhcpd_is_enabled
 763                 config_get odhcpd_is_main odhcpd maindhcp 0
 764                 /etc/init.d/odhcpd enabled && odhcpd_is_enabled=1 || odhcpd_is_enabled=0
 765
 766
 767                 if [ "$odhcpd_is_enabled" -eq 0 -a "$DHCPv6CAPABLE" -eq 1 ] ; then
 768                         # DHCP V4 and V6 in DNSMASQ
 769                         DNSMASQ_DHCP_VER=6
 770                 elif [ "$odhcpd_is_main" -gt 0 ] ; then
 771                         # ODHCPD is doing it all
 772                         DNSMASQ_DHCP_VER=0
 773                 else
 774                         # You have ODHCPD but use DNSMASQ for DHCPV4
 775                         DNSMASQ_DHCP_VER=4
 776                 fi
 777
 778         elif [ "$DHCPv6CAPABLE" -eq 1 ] ; then
 779                 # DHCP V4 and V6 in DNSMASQ
 780                 DNSMASQ_DHCP_VER=6
 781         else
 782                 DNSMASQ_DHCP_VER=4
 783         fi
 784
 785         # Allow DHCP/DHCPv6 to be handled by ISC DHCPD
 786         if [ -x /usr/sbin/dhcpd ] ; then
 787                 if [ -x /etc/init.d/dhcpd ] ; then
 788                         /etc/init.d/dhcpd enabled && DNSMASQ_DHCP_VER=0
 789                 fi
 790                 if [ -x /etc/init.d/dhcpd6 -a "$DNSMASQ_DHCP_VER" -gt 0 ] ; then
 791                         /etc/init.d/dhcpd6 enabled && DNSMASQ_DHCP_VER=4
 792                 fi
 793         fi
 794
 795         append_bool "$cfg" authoritative "--dhcp-authoritative"
 796         append_bool "$cfg" nodaemon "--no-daemon"
 797         append_bool "$cfg" domainneeded "--domain-needed"
 798         append_bool "$cfg" filterwin2k "--filterwin2k"
 799         append_bool "$cfg" nohosts "--no-hosts"
 800         append_bool "$cfg" nonegcache "--no-negcache"
 801         append_bool "$cfg" strictorder "--strict-order"
 802         append_bool "$cfg" logqueries "--log-queries=extra"
 803         append_bool "$cfg" noresolv "--no-resolv"
 804         append_bool "$cfg" localise_queries "--localise-queries"
 805         append_bool "$cfg" readethers "--read-ethers"
 806         append_bool "$cfg" dbus "--enable-dbus"
 807         append_bool "$cfg" expandhosts "--expand-hosts"
 808         config_get tftp_root "$cfg" "tftp_root"
 809         [ -n "$tftp_root" ] && mkdir -p "$tftp_root" && append_bool "$cfg" enable_tftp "--enable-tftp"
 810         append_bool "$cfg" tftp_no_fail "--tftp-no-fail"
 811         append_bool "$cfg" nonwildcard "--bind-dynamic" 1
 812         append_bool "$cfg" fqdn "--dhcp-fqdn"
 813         append_bool "$cfg" proxydnssec "--proxy-dnssec"
 814         append_bool "$cfg" localservice "--local-service"
 815         append_bool "$cfg" logdhcp "--log-dhcp"
 816         append_bool "$cfg" quietdhcp "--quiet-dhcp"
 817         append_bool "$cfg" sequential_ip "--dhcp-sequential-ip"
 818         append_bool "$cfg" allservers "--all-servers"
 819         append_bool "$cfg" noping "--no-ping"
 820
 821         append_parm "$cfg" logfacility "--log-facility"
 822
 823         append_parm "$cfg" cachesize "--cache-size"
 824         append_parm "$cfg" dnsforwardmax "--dns-forward-max"
 825         append_parm "$cfg" port "--port"
 826         append_parm "$cfg" ednspacket_max "--edns-packet-max"
 827         append_parm "$cfg" dhcpleasemax "--dhcp-lease-max"
 828         append_parm "$cfg" "queryport" "--query-port"
 829         append_parm "$cfg" "minport" "--min-port"
 830         append_parm "$cfg" "maxport" "--max-port"
 831         append_parm "$cfg" "domain" "--domain"
 832         append_parm "$cfg" "local" "--server"
 833         config_list_foreach "$cfg" "server" append_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 "$cfg" cachelocal 1
 870
 871         config_get resolvfile "$cfg" resolvfile "/tmp/resolv.conf.auto"
 872         xappend "--resolv-file=$resolvfile"
 873         # So jail doesn't complain if file missing
 874         [ \! -e "$resolvfile" ] && touch "$resolvfile"
 875
 876         config_get hostsfile "$cfg" dhcphostsfile
 877         [ -e "$hostsfile" ] && xappend "--dhcp-hostsfile=$hostsfile"
 878
 879         local rebind
 880         config_get_bool rebind "$cfg" rebind_protection 1
 881         [ $rebind -gt 0 ] && {
 882                 log_once \
 883                         "DNS rebinding protection is active," \
 884                         "will discard upstream RFC1918 responses!"
 885                 xappend "--stop-dns-rebind"
 886
 887                 local rebind_localhost
 888                 config_get_bool rebind_localhost "$cfg" rebind_localhost 0
 889                 [ $rebind_localhost -gt 0 ] && {
 890                         log_once "Allowing 127.0.0.0/8 responses"
 891                         xappend "--rebind-localhost-ok"
 892                 }
 893
 894                 append_rebind_domain() {
 895                         log_once "Allowing RFC1918 responses for domain $1"
 896                         xappend "--rebind-domain-ok=$1"
 897                 }
 898
 899                 config_list_foreach "$cfg" rebind_domain append_rebind_domain
 900         }
 901
 902         config_get_bool dnssec "$cfg" dnssec 0
 903         [ "$dnssec" -gt 0 ] && {
 904                 xappend "--conf-file=$TRUSTANCHORSFILE"
 905                 xappend "--dnssec"
 906                 [ -x /etc/init.d/sysntpd ] && {
 907                         /etc/init.d/sysntpd enabled
 908                         [ "$?" -ne 0 -o "$(uci_get system.ntp.enabled)" = "1" ] && {
 909                                 [ -f "$TIMEVALIDFILE" ] || xappend "--dnssec-no-timecheck"
 910                         }
 911                 }
 912                 append_bool "$cfg" dnsseccheckunsigned "--dnssec-check-unsigned"
 913         }
 914
 915         config_get addmac "$cfg" addmac 0
 916         [ "$addmac" != "0" ] && {
 917                 [ "$addmac" = "1" ] && addmac=
 918                 xappend "--add-mac${addmac:+="$addmac"}"
 919         }
 920
 921         dhcp_option_add "$cfg" "" 0
 922
 923         xappend "--dhcp-broadcast=tag:needs-broadcast"
 924
 925         xappend "--addn-hosts=$(dirname $HOSTFILE)"
 926
 927         config_get dnsmasqconfdir "$cfg" confdir "/tmp/dnsmasq.d"
 928         [ ! -d "$dnsmasqconfdir" ] && mkdir -p $dnsmasqconfdir
 929         xappend "--conf-dir=$dnsmasqconfdir"
 930         xappend "--user=dnsmasq"
 931         xappend "--group=dnsmasq"
 932         echo >> $CONFIGFILE_TMP
 933
 934         config_get_bool enable_tftp "$cfg" enable_tftp 0
 935         [ "$enable_tftp" -gt 0 ] && {
 936                 config_get tftp_root "$cfg" tftp_root
 937                 append EXTRA_MOUNT $tftp_root
 938         }
 939
 940         config_foreach filter_dnsmasq host dhcp_host_add "$cfg"
 941         echo >> $CONFIGFILE_TMP
 942         config_foreach filter_dnsmasq boot dhcp_boot_add "$cfg"
 943         config_foreach filter_dnsmasq mac dhcp_mac_add "$cfg"
 944         config_foreach filter_dnsmasq tag dhcp_tag_add "$cfg"
 945         config_foreach filter_dnsmasq vendorclass dhcp_vendorclass_add "$cfg"
 946         config_foreach filter_dnsmasq userclass dhcp_userclass_add "$cfg"
 947         config_foreach filter_dnsmasq circuitid dhcp_circuitid_add "$cfg"
 948         config_foreach filter_dnsmasq remoteid dhcp_remoteid_add "$cfg"
 949         config_foreach filter_dnsmasq subscrid dhcp_subscrid_add "$cfg"
 950         config_foreach filter_dnsmasq match dhcp_match_add "$cfg"
 951         config_foreach filter_dnsmasq domain dhcp_domain_add "$cfg"
 952         config_foreach filter_dnsmasq hostrecord dhcp_hostrecord_add "$cfg"
 953         config_foreach filter_dnsmasq relay dhcp_relay_add "$cfg"
 954
 955         echo >> $CONFIGFILE_TMP
 956         config_foreach filter_dnsmasq srvhost dhcp_srv_add "$cfg"
 957         config_foreach filter_dnsmasq mxhost dhcp_mx_add "$cfg"
 958         echo >> $CONFIGFILE_TMP
 959
 960         config_get_bool boguspriv "$cfg" boguspriv 1
 961         [ "$boguspriv" -gt 0 ] && {
 962                 xappend "--bogus-priv"
 963                 [ -r "$RFC6761FILE" ] && xappend "--conf-file=$RFC6761FILE"
 964         }
 965
 966         if [ "$DNSMASQ_DHCP_VER" -gt 4 ] ; then
 967                 # Enable RA feature for when/if it is constructed,
 968                 # and RA is selected per interface pool (RA, DHCP, or both),
 969                 # but no one (should) want RA broadcast in syslog
 970                 config_foreach filter_dnsmasq dhcp dhcp_add "$cfg"
 971                 xappend "--enable-ra"
 972                 xappend "--quiet-ra"
 973                 append_bool "$cfg" quietdhcp "--quiet-dhcp6"
 974
 975         elif [ "$DNSMASQ_DHCP_VER" -gt 0 ] ; then
 976                 config_foreach filter_dnsmasq dhcp dhcp_add "$cfg"
 977         fi
 978
 979
 980         echo >> $CONFIGFILE_TMP
 981         config_foreach filter_dnsmasq cname dhcp_cname_add "$cfg"
 982         echo >> $CONFIGFILE_TMP
 983
 984         echo >> $CONFIGFILE_TMP
 985         mv -f $CONFIGFILE_TMP $CONFIGFILE
 986
 987
 988         procd_open_instance $cfg
 989         procd_set_param command $PROG -C $CONFIGFILE -k -x /var/run/dnsmasq/dnsmasq."${cfg}".pid
 990         procd_set_param file $CONFIGFILE
 991         [ -n "$user_dhcpscript" ] && procd_set_param env USER_DHCPSCRIPT="$user_dhcpscript"
 992         procd_set_param respawn
 993
 994         local dnsmasqconffile="/etc/dnsmasq.${cfg}.conf"
 995         if [ ! -r "$dnsmasqconffile" ]; then
 996                 dnsmasqconffile=/etc/dnsmasq.conf
 997         fi
 998
 999         procd_add_jail dnsmasq ubus log
1000         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
1001         procd_add_jail_mount_rw /var/run/dnsmasq/ $leasefile
1002
1003         procd_close_instance
1004
1005
1006         # write /tmp/resolve.conf only for main instance
1007         dnsmasq_ismain $cfg && {
1008                 rm -f /tmp/resolv.conf
1009                 [ $ADD_LOCAL_DOMAIN -eq 1 ] && [ -n "$DOMAIN" ] && {
1010                         echo "search $DOMAIN" >> /tmp/resolv.conf
1011                 }
1012                 DNS_SERVERS="$DNS_SERVERS 127.0.0.1"
1013                 for DNS_SERVER in $DNS_SERVERS ; do
1014                         echo "nameserver $DNS_SERVER" >> /tmp/resolv.conf
1015                 done
1016         }
1017 }
1018
1019 dnsmasq_stop()
1020 {
1021         local cfg="$1"
1022
1023         #relink /tmp/resolve.conf only for main instance
1024         dnsmasq_ismain $cfg && {
1025                 [ -f /tmp/resolv.conf ] && rm -f /tmp/resolv.conf
1026                 ln -s /tmp/resolv.conf.auto /tmp/resolv.conf
1027         }
1028
1029         rm -f ${BASEDHCPSTAMPFILE}.${cfg}.*.dhcp
1030 }
1031
1032 service_triggers()
1033 {
1034         procd_add_reload_trigger "dhcp"
1035         procd_add_raw_trigger "interface.*" 2000 /etc/init.d/dnsmasq reload
1036 }
1037
1038 boot()
1039 {
1040         BOOT=1
1041         start "$@"
1042 }
1043
1044 start_service() {
1045         local instance="$1"
1046         local instance_found=0
1047
1048         [ -n "$BOOT" ] && return
1049
1050         . /lib/functions/network.sh
1051
1052         config_cb() {
1053                 local type="$1"
1054                 local name="$2"
1055                 if [ "$type" = "dnsmasq" ]; then
1056                         if [ -n "$instance" -a "$instance" = "$name" ]; then
1057                                 instance_found=1
1058                         fi
1059                 fi
1060         }
1061
1062         config_load dhcp
1063
1064         if [ -n "$instance" ]; then
1065                 [ "$instance_found" -gt 0 ] || return
1066                 dnsmasq_start "$instance"
1067         else
1068                 config_foreach dnsmasq_start dnsmasq
1069         fi
1070 }
1071
1072 reload_service() {
1073         rc_procd start_service "$@"
1074         return 0
1075 }
1076
1077 stop_service() {
1078         local instance="$1"
1079         local instance_found=0
1080
1081         config_cb() {
1082                 local type="$1"
1083                 local name="$2"
1084                 if [ "$type" = "dnsmasq" ]; then
1085                         if [ -n "$instance" -a "$instance" = "$name" ]; then
1086                                 instance_found=1
1087                         fi
1088                 fi
1089         }
1090
1091         config_load dhcp
1092
1093         if [ -n "$instance" ]; then
1094                 [ "$instance_found" -gt 0 ] || return
1095                 dnsmasq_stop "$instance"
1096         else
1097                 config_foreach dnsmasq_stop dnsmasq
1098         fi
1099 }