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