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="$3"
 106         local _loctmp
 107         config_get_bool _loctmp "$section" "$option" 0
 108         [ $_loctmp -gt 0 ] && xappend "$value"
 109 }
 110
 111 append_parm() {
 112         local section="$1"
 113         local option="$2"
 114         local switch="$3"
 115         local default="$4"
 116         local _loctmp
 117         config_get _loctmp "$section" "$option" "$default"
 118         [ -z "$_loctmp" ] && return 0
 119         xappend "$switch=$_loctmp"
 120 }
 121
 122 append_server() {
 123         xappend "--server=$1"
 124 }
 125
 126 append_address() {
 127         xappend "--address=$1"
 128 }
 129
 130 append_ipset() {
 131         xappend "--ipset=$1"
 132 }
 133
 134 append_interface() {
 135         network_get_device ifname "$1" || return
 136         xappend "--interface=$ifname"
 137 }
 138
 139 append_notinterface() {
 140         network_get_device ifname "$1" || return
 141         xappend "--except-interface=$ifname"
 142 }
 143
 144 append_addnhosts() {
 145         xappend "--addn-hosts=$1"
 146 }
 147
 148 append_bogusnxdomain() {
 149         xappend "--bogus-nxdomain=$1"
 150 }
 151
 152 append_pxe_service() {
 153         xappend "--pxe-service=$1"
 154 }
 155
 156 append_interface_name() {
 157         xappend "--interface-name=$1,$2"
 158 }
 159
 160 filter_dnsmasq() {
 161         local cfg="$1" func="$2" match_cfg="$3" found_cfg
 162
 163         # use entry when no instance entry set, or if it matches
 164         config_get found_cfg "$cfg" "instance"
 165         if [ -z "$found_cfg" -o "$found_cfg" = "$match_cfg" ]; then
 166                 $func $cfg
 167         fi
 168 }
 169
 170 dhcp_subscrid_add() {
 171         local cfg="$1"
 172
 173         config_get networkid "$cfg" networkid
 174         [ -n "$networkid" ] || return 0
 175
 176         config_get subscriberid "$cfg" subscriberid
 177         [ -n "$subscriberid" ] || return 0
 178
 179         xappend "--dhcp-subscrid=$networkid,$subscriberid"
 180
 181         config_get_bool force "$cfg" force 0
 182
 183         dhcp_option_add "$cfg" "$networkid" "$force"
 184 }
 185
 186 dhcp_remoteid_add() {
 187         local cfg="$1"
 188
 189         config_get networkid "$cfg" networkid
 190         [ -n "$networkid" ] || return 0
 191
 192         config_get remoteid "$cfg" remoteid
 193         [ -n "$remoteid" ] || return 0
 194
 195         xappend "--dhcp-remoteid=$networkid,$remoteid"
 196
 197         config_get_bool force "$cfg" force 0
 198
 199         dhcp_option_add "$cfg" "$networkid" "$force"
 200 }
 201
 202 dhcp_circuitid_add() {
 203         # TODO: DHCPV6 does not have circuitid; catch "option6:"
 204         local cfg="$1"
 205
 206         config_get networkid "$cfg" networkid
 207         [ -n "$networkid" ] || return 0
 208
 209         config_get circuitid "$cfg" circuitid
 210         [ -n "$circuitid" ] || return 0
 211
 212         xappend "--dhcp-circuitid=$networkid,$circuitid"
 213
 214         config_get_bool force "$cfg" force 0
 215
 216         dhcp_option_add "$cfg" "$networkid" "$force"
 217 }
 218
 219 dhcp_userclass_add() {
 220         local cfg="$1"
 221
 222         config_get networkid "$cfg" networkid
 223         [ -n "$networkid" ] || return 0
 224
 225         config_get userclass "$cfg" userclass
 226         [ -n "$userclass" ] || return 0
 227
 228         xappend "--dhcp-userclass=$networkid,$userclass"
 229
 230         config_get_bool force "$cfg" force 0
 231
 232         dhcp_option_add "$cfg" "$networkid" "$force"
 233 }
 234
 235 dhcp_vendorclass_add() {
 236         # TODO: DHCPV6 vendor class has stricter definitions; catch? fixup?
 237         local cfg="$1"
 238
 239         config_get networkid "$cfg" networkid
 240         [ -n "$networkid" ] || return 0
 241
 242         config_get vendorclass "$cfg" vendorclass
 243         [ -n "$vendorclass" ] || return 0
 244
 245         xappend "--dhcp-vendorclass=$networkid,$vendorclass"
 246
 247         config_get_bool force "$cfg" force 0
 248
 249         dhcp_option_add "$cfg" "$networkid" "$force"
 250 }
 251
 252 dhcp_match_add() {
 253         local cfg="$1"
 254
 255         config_get networkid "$cfg" networkid
 256         [ -n "$networkid" ] || return 0
 257
 258         config_get match "$cfg" match
 259         [ -n "$match" ] || return 0
 260
 261         xappend "--dhcp-match=$networkid,$match"
 262
 263         config_get_bool force "$cfg" force 0
 264
 265         dhcp_option_add "$cfg" "$networkid" "$force"
 266 }
 267
 268 dhcp_host_add() {
 269         local cfg="$1"
 270         local hosttag nametime addrs duids
 271
 272         config_get_bool force "$cfg" force 0
 273
 274         config_get networkid "$cfg" networkid
 275         [ -n "$networkid" ] && dhcp_option_add "$cfg" "$networkid" "$force"
 276
 277         config_get_bool enable "$cfg" enable 1
 278         [ "$enable" = "0" ] && return 0
 279
 280         config_get name "$cfg" name
 281         config_get ip "$cfg" ip
 282         config_get hostid "$cfg" hostid
 283
 284         [ -n "$ip" -o -n "$name" -o -n "$hostid" ] || return 0
 285
 286         config_get_bool dns "$cfg" dns 0
 287         [ "$dns" = "1" -a -n "$ip" -a -n "$name" ] && {
 288                 echo "$ip $name${DOMAIN:+.$DOMAIN}" >> $HOSTFILE
 289         }
 290
 291         config_get mac "$cfg" mac
 292         config_get duid "$cfg" duid
 293         config_get tag "$cfg" tag
 294
 295         if [ -n "$mac" ]; then
 296                 # --dhcp-host=00:20:e0:3b:13:af,192.168.0.199,lap
 297                 # many MAC are possible to track a laptop ON/OFF dock
 298                 macs=""
 299                 for m in $mac; do append macs "$m" ","; done
 300         fi
 301
 302         if [ $DNSMASQ_DHCP_VER -eq 6 -a -n "$duid" ]; then
 303                 # --dhcp-host=id:00:03:00:01:12:00:00:01:02:03,[::beef],lap
 304                 # one (virtual) machine gets one DUID per RFC3315
 305                 duids="id:${duid// */}"
 306         fi
 307
 308         if [ -z "$macs" -a -z "$duids" ]; then
 309                 # --dhcp-host=lap,192.168.0.199,[::beef]
 310                 [ -n "$name" ] || return 0
 311                 macs="$name"
 312                 name=""
 313         fi
 314
 315         if [ -n "$hostid" ]; then
 316                         hex_to_hostid hostid "$hostid"
 317         fi
 318
 319         config_get_bool broadcast "$cfg" broadcast 0
 320         config_get leasetime "$cfg" leasetime
 321
 322         [ "$broadcast" = "0" ] && broadcast= || broadcast=",set:needs-broadcast"
 323
 324         hosttag="${networkid:+,set:${networkid}}${tag:+,set:${tag}}$broadcast"
 325         nametime="${name:+,$name}${leasetime:+,$leasetime}"
 326
 327         if [ $DNSMASQ_DHCP_VER -eq 6 ]; then
 328                 addrs="${ip:+,$ip}${hostid:+,[::$hostid]}"
 329                 xappend "--dhcp-host=$macs${duids:+,$duids}$hosttag$addrs$nametime"
 330         else
 331                 xappend "--dhcp-host=$macs$hosttag${ip:+,$ip}$nametime"
 332         fi
 333 }
 334
 335 dhcp_this_host_add() {
 336         local net="$1"
 337         local ifname="$2"
 338         local mode="$3"
 339         local routerstub routername ifdashname
 340         local lanaddr lanaddr6 lanaddrs6 ulaprefix
 341
 342         if [ "$mode" -gt 0 ] ; then
 343                 ifdashname="${ifname//./-}"
 344                 routerstub="$( md5sum /etc/os-release )"
 345                 routerstub="router-${routerstub// */}"
 346                 routername="$( uci_get system @system[0] hostname $routerstub )"
 347
 348                 if [ "$mode" -gt 1 ] ; then
 349                         if [ "$mode" -gt 2 ] ; then
 350                                 if [ "$mode" -gt 3 ] ; then
 351                                         append_interface_name "$ifdashname.$routername.$DOMAIN" "$ifname"
 352                                 fi
 353
 354                                 append_interface_name "$routername.$DOMAIN" "$ifname"
 355                         fi
 356
 357                         # All IP addresses discovered by dnsmasq will be labeled (except fe80::)
 358                         append_interface_name "$routername" "$ifname"
 359
 360                 else
 361                         # This uses a static host file entry for only limited addresses.
 362                         # Use dnsmasq option "--expandhosts" to enable FQDN on host files.
 363                         ulaprefix="$(uci_get network @globals[0] ula_prefix)"
 364                         network_get_ipaddr lanaddr "$net"
 365                         network_get_ipaddrs6 lanaddrs6 "$net"
 366
 367                         if [ -n "$lanaddr" ] ; then
 368                                 dhcp_domain_add "" "$routername" "$lanaddr"
 369                         fi
 370
 371                         if [ -n "$ulaprefix" -a -n "$lanaddrs6" ] ; then
 372                                 for lanaddr6 in $lanaddrs6 ; do
 373                                         case "$lanaddr6" in
 374                                         "${ulaprefix%%:/*}"*)
 375                                                         dhcp_domain_add "" "$routername" "$lanaddr6"
 376                                                         ;;
 377                                         esac
 378                                 done
 379                         fi
 380                 fi
 381         fi
 382 }
 383
 384 dhcp_tag_add() {
 385         # NOTE: dnsmasq has explicit "option6:" prefix for DHCPv6 so no collisions
 386         local cfg="$1"
 387
 388         tag="$cfg"
 389
 390         [ -n "$tag" ] || return 0
 391
 392         config_get_bool force "$cfg" force 0
 393         [ "$force" = "0" ] && force=
 394
 395         config_get option "$cfg" dhcp_option
 396         for o in $option; do
 397                 xappend "--dhcp-option${force:+-force}=tag:$tag,$o"
 398         done
 399 }
 400
 401 dhcp_mac_add() {
 402         local cfg="$1"
 403
 404         config_get networkid "$cfg" networkid
 405         [ -n "$networkid" ] || return 0
 406
 407         config_get mac "$cfg" mac
 408         [ -n "$mac" ] || return 0
 409
 410         xappend "--dhcp-mac=$networkid,$mac"
 411
 412         dhcp_option_add "$cfg" "$networkid"
 413 }
 414
 415 dhcp_boot_add() {
 416         # TODO: BOOTURL is different between DHCPv4 and DHCPv6
 417         local cfg="$1"
 418
 419         config_get networkid "$cfg" networkid
 420
 421         config_get filename "$cfg" filename
 422         [ -n "$filename" ] || return 0
 423
 424         config_get servername "$cfg" servername
 425         config_get serveraddress "$cfg" serveraddress
 426
 427         [ -n "$serveraddress" -a ! -n "$servername" ] && return 0
 428
 429         xappend "--dhcp-boot=${networkid:+net:$networkid,}${filename}${servername:+,$servername}${serveraddress:+,$serveraddress}"
 430
 431         config_get_bool force "$cfg" force 0
 432
 433         dhcp_option_add "$cfg" "$networkid" "$force"
 434 }
 435
 436
 437 dhcp_add() {
 438         local cfg="$1"
 439         local dhcp6range="::"
 440         local nettag
 441
 442         config_get net "$cfg" interface
 443         [ -n "$net" ] || return 0
 444
 445         config_get networkid "$cfg" networkid
 446         [ -n "$networkid" ] || networkid="$net"
 447
 448         network_get_subnet subnet "$net" || return 0
 449         network_get_device ifname "$net" || return 0
 450         network_get_protocol proto "$net" || return 0
 451
 452         [ "$cachelocal" = "0" ] && network_get_dnsserver dnsserver "$net" && {
 453                 DNS_SERVERS="$DNS_SERVERS $dnsserver"
 454         }
 455
 456         append_bool "$cfg" ignore "--no-dhcp-interface=$ifname" && {
 457                 # Many ISP do not have useful names for DHCP customers (your WAN).
 458                 dhcp_this_host_add "$net" "$ifname" "$ADD_WAN_FQDN"
 459                 return 0
 460         }
 461
 462         # Do not support non-static interfaces for now
 463         [ static = "$proto" ] || return 0
 464
 465         # Override interface netmask with dhcp config if applicable
 466         config_get netmask "$cfg" netmask "${subnet##*/}"
 467
 468         #check for an already active dhcp server on the interface, unless 'force' is set
 469         config_get_bool force "$cfg" force 0
 470         [ $force -gt 0 ] || dhcp_check "$ifname" || return 0
 471
 472         config_get start "$cfg" start 100
 473         config_get limit "$cfg" limit 150
 474         config_get leasetime "$cfg" leasetime 12h
 475         config_get options "$cfg" options
 476         config_get_bool dynamicdhcp "$cfg" dynamicdhcp 1
 477
 478         config_get dhcpv4 "$cfg" dhcpv4
 479         config_get dhcpv6 "$cfg" dhcpv6
 480
 481         config_get ra "$cfg" ra
 482         config_get ra_management "$cfg" ra_management
 483         config_get ra_preference "$cfg" ra_preference
 484         config_get dns "$cfg" dns
 485
 486         config_list_foreach "$cfg" "interface_name" append_interface_name "$ifname"
 487
 488         # Put the router host name on this DHCP served interface address(es)
 489         dhcp_this_host_add "$net" "$ifname" "$ADD_LOCAL_FQDN"
 490
 491         start="$( dhcp_calc "$start" )"
 492         nettag="${networkid:+set:${networkid},}"
 493
 494         if [ "$limit" -gt 0 ] ; then
 495                 limit=$((limit-1))
 496         fi
 497
 498         eval "$(ipcalc.sh "${subnet%%/*}" $netmask $start $limit)"
 499
 500         if [ "$dynamicdhcp" = "0" ] ; then
 501                 END="static"
 502                 dhcp6range="::,static"
 503         else
 504                 dhcp6range="::1000,::ffff"
 505         fi
 506
 507
 508         if [ "$dhcpv4" != "disabled" ] ; then
 509                 xappend "--dhcp-range=$nettag$START,$END,$NETMASK,$leasetime${options:+ $options}"
 510         fi
 511
 512
 513         if [ $DNSMASQ_DHCP_VER -eq 6 -a "$ra" = "server" ] ; then
 514                 # Note: dnsmasq cannot just be a DHCPv6 server (all-in-1)
 515                 # and let some other machine(s) send RA pointing to it.
 516
 517                 case $ra_preference in
 518                 *high*)
 519                         xappend "--ra-param=$ifname,high,0,7200"
 520                         ;;
 521                 *low*)
 522                         xappend "--ra-param=$ifname,low,0,7200"
 523                         ;;
 524                 *)
 525                         # Send UNSOLICITED RA at default interval and live for 2 hours.
 526                         # TODO: convert flexible lease time into route life time (only seconds).
 527                         xappend "--ra-param=$ifname,0,7200"
 528                         ;;
 529                 esac
 530
 531                 if [ "$dhcpv6" = "disabled" ] ; then
 532                         ra_management="3"
 533                 fi
 534
 535
 536                 case $ra_management in
 537                 0)
 538                         # SLACC with DCHP for extended options
 539                         xappend "--dhcp-range=$nettag::,constructor:$ifname,ra-stateless,ra-names"
 540                         ;;
 541                 2)
 542                         # DHCP address and RA only for management redirection
 543                         xappend "--dhcp-range=$nettag$dhcp6range,constructor:$ifname,$leasetime"
 544                         ;;
 545                 3)
 546                         # SLAAC only but dnsmasq attempts to link HOSTNAME, DHCPv4 MAC, and SLAAC
 547                         xappend "--dhcp-range=$nettag::,constructor:$ifname,ra-only,ra-names"
 548                         ;;
 549                 *)
 550                         # SLAAC and full DHCP
 551                         xappend "--dhcp-range=$nettag$dhcp6range,constructor:$ifname,slaac,ra-names,$leasetime"
 552                         ;;
 553                 esac
 554
 555                 if [ -n "$dns" ]; then
 556                         dnss=""
 557                         for d in $dns; do append dnss "[$d]" ","; done
 558                 else
 559                         dnss="[::]"
 560                 fi
 561
 562                 dhcp_option_append "option6:dns-server,$dnss" "$networkid"
 563         fi
 564
 565         dhcp_option_add "$cfg" "$networkid"
 566 }
 567
 568 dhcp_option_append() {
 569         local option="$1"
 570         local networkid="$2"
 571         local force="$3"
 572
 573         xappend "--dhcp-option${force:+-force}=${networkid:+$networkid,}$option"
 574 }
 575
 576 dhcp_option_add() {
 577         # NOTE: dnsmasq has explicit "option6:" prefix for DHCPv6 so no collisions
 578         local cfg="$1"
 579         local networkid="$2"
 580         local force="$3"
 581
 582         [ "$force" = "0" ] && force=
 583
 584         local list_len
 585         config_get list_len "$cfg" dhcp_option_LENGTH
 586
 587         if [ -n "$list_len" ]; then
 588                 config_list_foreach "$cfg" dhcp_option dhcp_option_append "$networkid" "$force"
 589         else
 590                 config_get dhcp_option "$cfg" dhcp_option
 591
 592                 [ -n "$dhcp_option" ] && echo "Warning: the 'option dhcp_option' syntax is deprecated, use 'list dhcp_option'" >&2
 593
 594                 local option
 595                 for option in $dhcp_option; do
 596                         dhcp_option_append "$option" "$networkid" "$force"
 597                 done
 598         fi
 599 }
 600
 601 dhcp_domain_add() {
 602         local cfg="$1"
 603         local ip name names record
 604
 605         config_get names "$cfg" name "$2"
 606         [ -n "$names" ] || return 0
 607
 608         config_get ip "$cfg" ip "$3"
 609         [ -n "$ip" ] || return 0
 610
 611         for name in $names; do
 612                 record="${record:+$record }$name"
 613         done
 614
 615         echo "$ip $record" >> $HOSTFILE
 616 }
 617
 618 dhcp_srv_add() {
 619         local cfg="$1"
 620
 621         config_get srv "$cfg" srv
 622         [ -n "$srv" ] || return 0
 623
 624         config_get target "$cfg" target
 625         [ -n "$target" ] || return 0
 626
 627         config_get port "$cfg" port
 628         [ -n "$port" ] || return 0
 629
 630         config_get class "$cfg" class
 631         config_get weight "$cfg" weight
 632
 633         local service="$srv,$target,$port${class:+,$class${weight:+,$weight}}"
 634
 635         xappend "--srv-host=$service"
 636 }
 637
 638 dhcp_mx_add() {
 639         local cfg="$1"
 640         local domain relay pref
 641
 642         config_get domain "$cfg" domain
 643         [ -n "$domain" ] || return 0
 644
 645         config_get relay "$cfg" relay
 646         [ -n "$relay" ] || return 0
 647
 648         config_get pref "$cfg" pref 0
 649
 650         local service="$domain,$relay,$pref"
 651
 652         xappend "--mx-host=$service"
 653 }
 654
 655 dhcp_cname_add() {
 656         local cfg="$1"
 657         local cname target
 658
 659         config_get cname "$cfg" cname
 660         [ -n "$cname" ] || return 0
 661
 662         config_get target "$cfg" target
 663         [ -n "$target" ] || return 0
 664
 665         xappend "--cname=${cname},${target}"
 666 }
 667
 668 dhcp_hostrecord_add() {
 669         local cfg="$1"
 670         local names addresses record val
 671
 672         config_get names "$cfg" name "$2"
 673         if [ -z "$names" ]; then
 674                 return 0
 675         fi
 676
 677         config_get addresses "$cfg" ip "$3"
 678         if [ -z "$addresses" ]; then
 679                 return 0
 680         fi
 681
 682         for val in $names $addresses; do
 683                 record="${record:+$record,}$val"
 684         done
 685
 686         xappend "--host-record=$record"
 687 }
 688
 689 dhcp_relay_add() {
 690         local cfg="$1"
 691         local local_addr server_addr interface
 692
 693         config_get local_addr "$cfg" local_addr
 694         [ -n "$local_addr" ] || return 0
 695
 696         config_get server_addr "$cfg" server_addr
 697         [ -n "$server_addr" ] || return 0
 698
 699         config_get interface "$cfg" interface
 700         if [ -z "$interface" ]; then
 701                 xappend "--dhcp-relay=$local_addr,$server_addr"
 702         else
 703                 network_get_device ifname "$interface" || return
 704                 xappend "--dhcp-relay=$local_addr,$server_addr,$ifname"
 705         fi
 706 }
 707
 708 dnsmasq_start()
 709 {
 710         local cfg="$1" disabled resolvfile user_dhcpscript
 711
 712         config_get_bool disabled "$cfg" disabled 0
 713         [ "$disabled" -gt 0 ] && return 0
 714
 715         # reset list of DOMAINS and DNS servers (for each dnsmasq instance)
 716         DNS_SERVERS=""
 717         DOMAIN=""
 718         CONFIGFILE="${BASECONFIGFILE}.${cfg}"
 719         CONFIGFILE_TMP="${CONFIGFILE}.$$"
 720         HOSTFILE="${BASEHOSTFILE}.${cfg}"
 721         TIMESTAMPFILE="${BASETIMESTAMPFILE}.${cfg}"
 722         BASEDHCPSTAMPFILE_CFG="${BASEDHCPSTAMPFILE}.${cfg}"
 723
 724         # before we can call xappend
 725         mkdir -p /var/run/dnsmasq/
 726         mkdir -p $(dirname $CONFIGFILE)
 727         mkdir -p $(dirname $HOSTFILE)
 728         mkdir -p /var/lib/misc
 729         chown dnsmasq:dnsmasq /var/run/dnsmasq
 730
 731         [ -f "$TIMESTAMPFILE" ] && rm -f "$TIMESTAMPFILE"
 732
 733         echo "# auto-generated config file from /etc/config/dhcp" > $CONFIGFILE_TMP
 734         echo "# auto-generated config file from /etc/config/dhcp" > $HOSTFILE
 735
 736         # if we did this last, we could override auto-generated config
 737         [ -f /etc/dnsmasq.conf ] && {
 738                 xappend "--conf-file=/etc/dnsmasq.conf"
 739         }
 740
 741         $PROG --version | grep -osqE "^Compile time options:.* DHCPv6( |$)" && DHCPv6CAPABLE=1 || DHCPv6CAPABLE=0
 742
 743
 744         if [ -x /usr/sbin/odhcpd -a -x /etc/init.d/odhcpd ] ; then
 745                 local odhcpd_is_main odhcpd_is_enabled
 746                 config_get odhcpd_is_main odhcpd maindhcp 0
 747                 /etc/init.d/odhcpd enabled && odhcpd_is_enabled=1 || odhcpd_is_enabled=0
 748
 749
 750                 if [ "$odhcpd_is_enabled" -eq 0 -a "$DHCPv6CAPABLE" -eq 1 ] ; then
 751                         # DHCP V4 and V6 in DNSMASQ
 752                         DNSMASQ_DHCP_VER=6
 753                 elif [ "$odhcpd_is_main" -gt 0 ] ; then
 754                         # ODHCPD is doing it all
 755                         DNSMASQ_DHCP_VER=0
 756                 else
 757                         # You have ODHCPD but use DNSMASQ for DHCPV4
 758                         DNSMASQ_DHCP_VER=4
 759                 fi
 760
 761         elif [ "$DHCPv6CAPABLE" -eq 1 ] ; then
 762                 # DHCP V4 and V6 in DNSMASQ
 763                 DNSMASQ_DHCP_VER=6
 764         else
 765                 DNSMASQ_DHCP_VER=4
 766         fi
 767
 768         # Allow DHCP/DHCPv6 to be handled by ISC DHCPD
 769         if [ -x /usr/sbin/dhcpd ] ; then
 770                 if [ -x /etc/init.d/dhcpd ] ; then
 771                         /etc/init.d/dhcpd enabled && DNSMASQ_DHCP_VER=0
 772                 fi
 773                 if [ -x /etc/init.d/dhcpd6 -a "$DNSMASQ_DHCP_VER" -gt 0 ] ; then
 774                         /etc/init.d/dhcpd6 enabled && DNSMASQ_DHCP_VER=4
 775                 fi
 776         fi
 777
 778         append_bool "$cfg" authoritative "--dhcp-authoritative"
 779         append_bool "$cfg" nodaemon "--no-daemon"
 780         append_bool "$cfg" domainneeded "--domain-needed"
 781         append_bool "$cfg" filterwin2k "--filterwin2k"
 782         append_bool "$cfg" nohosts "--no-hosts"
 783         append_bool "$cfg" nonegcache "--no-negcache"
 784         append_bool "$cfg" strictorder "--strict-order"
 785         append_bool "$cfg" logqueries "--log-queries=extra"
 786         append_bool "$cfg" noresolv "--no-resolv"
 787         append_bool "$cfg" localise_queries "--localise-queries"
 788         append_bool "$cfg" readethers "--read-ethers"
 789         append_bool "$cfg" dbus "--enable-dbus"
 790         append_bool "$cfg" expandhosts "--expand-hosts"
 791         config_get tftp_root "$cfg" "tftp_root"
 792         [ -n "$tftp_root" ] && mkdir -p "$tftp_root" && append_bool "$cfg" enable_tftp "--enable-tftp"
 793         append_bool "$cfg" tftp_no_fail "--tftp-no-fail"
 794         append_bool "$cfg" nonwildcard "--bind-dynamic"
 795         append_bool "$cfg" fqdn "--dhcp-fqdn"
 796         append_bool "$cfg" proxydnssec "--proxy-dnssec"
 797         append_bool "$cfg" localservice "--local-service"
 798         append_bool "$cfg" logdhcp "--log-dhcp"
 799         append_bool "$cfg" quietdhcp "--quiet-dhcp"
 800         append_bool "$cfg" sequential_ip "--dhcp-sequential-ip"
 801         append_bool "$cfg" allservers "--all-servers"
 802         append_bool "$cfg" noping "--no-ping"
 803
 804         append_parm "$cfg" logfacility "--log-facility"
 805
 806         append_parm "$cfg" cachesize "--cache-size"
 807         append_parm "$cfg" dnsforwardmax "--dns-forward-max"
 808         append_parm "$cfg" port "--port"
 809         append_parm "$cfg" ednspacket_max "--edns-packet-max"
 810         append_parm "$cfg" dhcpleasemax "--dhcp-lease-max"
 811         append_parm "$cfg" "queryport" "--query-port"
 812         append_parm "$cfg" "minport" "--min-port"
 813         append_parm "$cfg" "maxport" "--max-port"
 814         append_parm "$cfg" "domain" "--domain"
 815         append_parm "$cfg" "local" "--server"
 816         config_list_foreach "$cfg" "server" append_server
 817         config_list_foreach "$cfg" "address" append_address
 818         config_list_foreach "$cfg" "ipset" append_ipset
 819         config_list_foreach "$cfg" "interface" append_interface
 820         config_list_foreach "$cfg" "notinterface" append_notinterface
 821         config_list_foreach "$cfg" "addnhosts" append_addnhosts
 822         config_list_foreach "$cfg" "bogusnxdomain" append_bogusnxdomain
 823         append_parm "$cfg" "leasefile" "--dhcp-leasefile" "/tmp/dhcp.leases"
 824         append_parm "$cfg" "serversfile" "--servers-file"
 825         append_parm "$cfg" "tftp_root" "--tftp-root"
 826         append_parm "$cfg" "dhcp_boot" "--dhcp-boot"
 827         append_parm "$cfg" "local_ttl" "--local-ttl"
 828         append_parm "$cfg" "pxe_prompt" "--pxe-prompt"
 829         config_list_foreach "$cfg" "pxe_service" append_pxe_service
 830         config_get DOMAIN "$cfg" domain
 831
 832         config_get_bool ADD_LOCAL_DOMAIN "$cfg" add_local_domain 1
 833         config_get_bool ADD_LOCAL_HOSTNAME "$cfg" add_local_hostname 1
 834         config_get ADD_LOCAL_FQDN "$cfg" add_local_fqdn ""
 835         config_get ADD_WAN_FQDN "$cfg" add_wan_fqdn 0
 836
 837         if [ -z "$ADD_LOCAL_FQDN" ] ; then
 838                 # maintain support for previous UCI
 839                 ADD_LOCAL_FQDN="$ADD_LOCAL_HOSTNAME"
 840         fi
 841
 842         config_get_bool readethers "$cfg" readethers
 843         [ "$readethers" = "1" -a \! -e "/etc/ethers" ] && touch /etc/ethers
 844
 845         config_get user_dhcpscript $cfg dhcpscript
 846         if has_handler || [ -n "$user_dhcpscript" ]; then
 847                 xappend "--dhcp-script=$DHCPSCRIPT"
 848         fi
 849
 850         config_get leasefile $cfg leasefile "/tmp/dhcp.leases"
 851         [ -n "$leasefile" -a \! -e "$leasefile" ] && touch "$leasefile"
 852         config_get_bool cachelocal "$cfg" cachelocal 1
 853
 854         config_get_bool noresolv "$cfg" noresolv 0
 855         if [ "$noresolv" != "1" ]; then
 856                 config_get resolvfile "$cfg" resolvfile "/tmp/resolv.conf.auto"
 857                 # So jail doesn't complain if file missing
 858                 [ -n "$resolvfile" -a \! -e "$resolvfile" ] && touch "$resolvfile"
 859         fi
 860
 861         [ -n "$resolvfile" ] && xappend "--resolv-file=$resolvfile"
 862
 863         config_get hostsfile "$cfg" dhcphostsfile
 864         [ -e "$hostsfile" ] && xappend "--dhcp-hostsfile=$hostsfile"
 865
 866         local rebind
 867         config_get_bool rebind "$cfg" rebind_protection 1
 868         [ $rebind -gt 0 ] && {
 869                 log_once \
 870                         "DNS rebinding protection is active," \
 871                         "will discard upstream RFC1918 responses!"
 872                 xappend "--stop-dns-rebind"
 873
 874                 local rebind_localhost
 875                 config_get_bool rebind_localhost "$cfg" rebind_localhost 0
 876                 [ $rebind_localhost -gt 0 ] && {
 877                         log_once "Allowing 127.0.0.0/8 responses"
 878                         xappend "--rebind-localhost-ok"
 879                 }
 880
 881                 append_rebind_domain() {
 882                         log_once "Allowing RFC1918 responses for domain $1"
 883                         xappend "--rebind-domain-ok=$1"
 884                 }
 885
 886                 config_list_foreach "$cfg" rebind_domain append_rebind_domain
 887         }
 888
 889         config_get_bool dnssec "$cfg" dnssec 0
 890         [ "$dnssec" -gt 0 ] && {
 891                 xappend "--conf-file=$TRUSTANCHORSFILE"
 892                 xappend "--dnssec"
 893                 [ -x /etc/init.d/sysntpd ] && {
 894                         /etc/init.d/sysntpd enabled
 895                         [ "$?" -ne 0 -o "$(uci_get system.ntp.enabled)" = "1" ] && {
 896                                 [ -f "$TIMEVALIDFILE" ] || xappend "--dnssec-no-timecheck"
 897                         }
 898                 }
 899                 append_bool "$cfg" dnsseccheckunsigned "--dnssec-check-unsigned"
 900         }
 901
 902         config_get addmac "$cfg" addmac 0
 903         [ "$addmac" != "0" ] && {
 904                 [ "$addmac" = "1" ] && addmac=
 905                 xappend "--add-mac${addmac:+="$addmac"}"
 906         }
 907
 908         dhcp_option_add "$cfg" "" 0
 909
 910         xappend "--dhcp-broadcast=tag:needs-broadcast"
 911
 912         xappend "--addn-hosts=$(dirname $HOSTFILE)"
 913
 914         config_get dnsmasqconfdir "$cfg" confdir "/tmp/dnsmasq.d"
 915         [ ! -d "$dnsmasqconfdir" ] && mkdir -p $dnsmasqconfdir
 916         xappend "--conf-dir=$dnsmasqconfdir"
 917         xappend "--user=dnsmasq"
 918         xappend "--group=dnsmasq"
 919         echo >> $CONFIGFILE_TMP
 920
 921         config_get_bool enable_tftp "$cfg" enable_tftp 0
 922         [ "$enable_tftp" -gt 0 ] && {
 923                 config_get tftp_root "$cfg" tftp_root
 924                 append EXTRA_MOUNT $tftp_root
 925         }
 926
 927         config_foreach filter_dnsmasq host dhcp_host_add "$cfg"
 928         echo >> $CONFIGFILE_TMP
 929         config_foreach filter_dnsmasq boot dhcp_boot_add "$cfg"
 930         config_foreach filter_dnsmasq mac dhcp_mac_add "$cfg"
 931         config_foreach filter_dnsmasq tag dhcp_tag_add "$cfg"
 932         config_foreach filter_dnsmasq vendorclass dhcp_vendorclass_add "$cfg"
 933         config_foreach filter_dnsmasq userclass dhcp_userclass_add "$cfg"
 934         config_foreach filter_dnsmasq circuitid dhcp_circuitid_add "$cfg"
 935         config_foreach filter_dnsmasq remoteid dhcp_remoteid_add "$cfg"
 936         config_foreach filter_dnsmasq subscrid dhcp_subscrid_add "$cfg"
 937         config_foreach filter_dnsmasq match dhcp_match_add "$cfg"
 938         config_foreach filter_dnsmasq domain dhcp_domain_add "$cfg"
 939         config_foreach filter_dnsmasq hostrecord dhcp_hostrecord_add "$cfg"
 940         config_foreach filter_dnsmasq relay dhcp_relay_add "$cfg"
 941
 942         echo >> $CONFIGFILE_TMP
 943         config_foreach filter_dnsmasq srvhost dhcp_srv_add "$cfg"
 944         config_foreach filter_dnsmasq mxhost dhcp_mx_add "$cfg"
 945         echo >> $CONFIGFILE_TMP
 946
 947         config_get_bool boguspriv "$cfg" boguspriv 1
 948         [ "$boguspriv" -gt 0 ] && {
 949                 xappend "--bogus-priv"
 950                 [ -r "$RFC6761FILE" ] && xappend "--conf-file=$RFC6761FILE"
 951         }
 952
 953         if [ "$DNSMASQ_DHCP_VER" -gt 4 ] ; then
 954                 # Enable RA feature for when/if it is constructed,
 955                 # and RA is selected per interface pool (RA, DHCP, or both),
 956                 # but no one (should) want RA broadcast in syslog
 957                 config_foreach filter_dnsmasq dhcp dhcp_add "$cfg"
 958                 xappend "--enable-ra"
 959                 xappend "--quiet-ra"
 960                 append_bool "$cfg" quietdhcp "--quiet-dhcp6"
 961
 962         elif [ "$DNSMASQ_DHCP_VER" -gt 0 ] ; then
 963                 config_foreach filter_dnsmasq dhcp dhcp_add "$cfg"
 964         fi
 965
 966
 967         echo >> $CONFIGFILE_TMP
 968         config_foreach filter_dnsmasq cname dhcp_cname_add "$cfg"
 969         echo >> $CONFIGFILE_TMP
 970
 971         echo >> $CONFIGFILE_TMP
 972         mv -f $CONFIGFILE_TMP $CONFIGFILE
 973
 974         [ "$resolvfile" = "/tmp/resolv.conf.auto" ] && {
 975                 rm -f /tmp/resolv.conf
 976                 [ $ADD_LOCAL_DOMAIN -eq 1 ] && [ -n "$DOMAIN" ] && {
 977                         echo "search $DOMAIN" >> /tmp/resolv.conf
 978                 }
 979                 DNS_SERVERS="$DNS_SERVERS 127.0.0.1"
 980                 for DNS_SERVER in $DNS_SERVERS ; do
 981                         echo "nameserver $DNS_SERVER" >> /tmp/resolv.conf
 982                 done
 983         }
 984
 985         procd_open_instance $cfg
 986         procd_set_param command $PROG -C $CONFIGFILE -k -x /var/run/dnsmasq/dnsmasq."${cfg}".pid
 987         procd_set_param file $CONFIGFILE
 988         [ -n "$user_dhcpscript" ] && procd_set_param env USER_DHCPSCRIPT="$user_dhcpscript"
 989         procd_set_param respawn
 990
 991         local dnsmasqconffile="/etc/dnsmasq.${cfg}.conf"
 992         if [ ! -r "$dnsmasqconffile" ]; then
 993                 dnsmasqconffile=/etc/dnsmasq.conf
 994         fi
 995
 996         procd_add_jail dnsmasq ubus log
 997         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
 998         procd_add_jail_mount_rw /var/run/dnsmasq/ $leasefile
 999
1000         procd_close_instance
1001 }
1002
1003 dnsmasq_stop()
1004 {
1005         local cfg="$1"
1006
1007         config_get resolvfile "$cfg" "resolvfile"
1008
1009         #relink /tmp/resolve.conf only for main instance
1010         [ "$resolvfile" = "/tmp/resolv.conf.auto" ] && {
1011                 [ -f /tmp/resolv.conf ] && {
1012                         rm -f /tmp/resolv.conf
1013                         ln -s "$resolvfile" /tmp/resolv.conf
1014                 }
1015         }
1016
1017         rm -f ${BASEDHCPSTAMPFILE}.${cfg}.*.dhcp
1018 }
1019
1020 service_triggers()
1021 {
1022         procd_add_reload_trigger "dhcp"
1023         procd_add_raw_trigger "interface.*" 2000 /etc/init.d/dnsmasq reload
1024 }
1025
1026 boot()
1027 {
1028         BOOT=1
1029         start "$@"
1030 }
1031
1032 start_service() {
1033         local instance="$1"
1034         local instance_found=0
1035
1036         [ -n "$BOOT" ] && return
1037
1038         . /lib/functions/network.sh
1039
1040         config_cb() {
1041                 local type="$1"
1042                 local name="$2"
1043                 if [ "$type" = "dnsmasq" ]; then
1044                         if [ -n "$instance" -a "$instance" = "$name" ]; then
1045                                 instance_found=1
1046                         fi
1047                 fi
1048         }
1049
1050         config_load dhcp
1051
1052         if [ -n "$instance" ]; then
1053                 [ "$instance_found" -gt 0 ] || return
1054                 dnsmasq_start "$instance"
1055         else
1056                 config_foreach dnsmasq_start dnsmasq
1057         fi
1058 }
1059
1060 reload_service() {
1061         rc_procd start_service "$@"
1062         return 0
1063 }
1064
1065 stop_service() {
1066         local instance="$1"
1067         local instance_found=0
1068
1069         config_cb() {
1070                 local type="$1"
1071                 local name="$2"
1072                 if [ "$type" = "dnsmasq" ]; then
1073                         if [ -n "$instance" -a "$instance" = "$name" ]; then
1074                                 instance_found=1
1075                         fi
1076                 fi
1077         }
1078
1079         config_load dhcp
1080
1081         if [ -n "$instance" ]; then
1082                 [ "$instance_found" -gt 0 ] || return
1083                 dnsmasq_stop "$instance"
1084         else
1085                 config_foreach dnsmasq_stop dnsmasq
1086         fi
1087 }