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 TRUSTANCHORSFILE="/usr/share/dnsmasq/trust-anchors.conf"
  17 TIMEVALIDFILE="/var/state/dnsmasqsec"
  18 BASEDHCPSTAMPFILE="/var/run/dnsmasq"
  19 RFC6761FILE="/usr/share/dnsmasq/rfc6761.conf"
  20 DHCPSCRIPT="/usr/lib/dnsmasq/dhcp-script.sh"
  21
  22 DNSMASQ_DHCP_VER=4
  23
  24 xappend() {
  25         local value="$1"
  26
  27         echo "${value#--}" >> $CONFIGFILE_TMP
  28 }
  29
  30 hex_to_hostid() {
  31         local var="$1"
  32         local hex="${2#0x}" # strip optional "0x" prefix
  33
  34         if [ -n "${hex//[0-9a-fA-F]/}" ]; then
  35                 # is invalid hex literal
  36                 return 1
  37         fi
  38
  39         # convert into host id
  40         export "$var=$(
  41                 printf "%0x:%0x" \
  42                 $(((0x$hex >> 16) % 65536)) \
  43                 $(( 0x$hex        % 65536))
  44                 )"
  45
  46         return 0
  47 }
  48
  49 dhcp_calc() {
  50         local ip="$1"
  51         local res=0
  52
  53         while [ -n "$ip" ]; do
  54                 part="${ip%%.*}"
  55                 res="$(($res * 256))"
  56                 res="$(($res + $part))"
  57                 [ "${ip%.*}" != "$ip" ] && ip="${ip#*.}" || ip=
  58         done
  59         echo "$res"
  60 }
  61
  62 dhcp_check() {
  63         local ifname="$1"
  64         local stamp="${BASEDHCPSTAMPFILE_CFG}.${ifname}.dhcp"
  65         local rv=0
  66
  67         [ -s "$stamp" ] && return $(cat "$stamp")
  68
  69         # If there's no carrier yet, skip this interface.
  70         # The init script will be called again once the link is up
  71         case "$(devstatus "$ifname" | jsonfilter -e @.carrier)" in
  72                 false) return 1;;
  73         esac
  74
  75         udhcpc -n -q -s /bin/true -t 1 -i "$ifname" >&- && rv=1 || rv=0
  76
  77         [ $rv -eq 1 ] && \
  78                 logger -t dnsmasq \
  79                         "found already running DHCP-server on interface '$ifname'" \
  80                         "refusing to start, use 'option force 1' to override"
  81
  82         echo $rv > "$stamp"
  83         return $rv
  84 }
  85
  86 log_once() {
  87         pidof dnsmasq >/dev/null || \
  88                 logger -t dnsmasq "$@"
  89 }
  90
  91 has_handler() {
  92         local file
  93
  94         for file in /etc/hotplug.d/dhcp/* /etc/hotplug.d/tftp/* /etc/hotplug.d/neigh/*; do
  95                 [ -f "$file" ] && return 0
  96         done
  97
  98         return 1
  99 }
 100
 101 append_bool() {
 102         local section="$1"
 103         local option="$2"
 104         local value="$3"
 105         local default="$4"
 106         local _loctmp
 107         [ -z "$default" ] && default="0"
 108         config_get_bool _loctmp "$section" "$option" "$default"
 109         [ $_loctmp -gt 0 ] && xappend "$value"
 110 }
 111
 112 append_parm() {
 113         local section="$1"
 114         local option="$2"
 115         local switch="$3"
 116         local default="$4"
 117         local _loctmp
 118         config_get _loctmp "$section" "$option" "$default"
 119         [ -z "$_loctmp" ] && return 0
 120         xappend "$switch=$_loctmp"
 121 }
 122
 123 append_server() {
 124         xappend "--server=$1"
 125 }
 126
 127 append_rev_server() {
 128         xappend "--rev-server=$1"
 129 }
 130
 131 append_address() {
 132         xappend "--address=$1"
 133 }
 134
 135 append_ipset() {
 136         xappend "--ipset=$1"
 137 }
 138
 139 append_interface() {
 140         network_get_device ifname "$1" || ifname="$1"
 141         xappend "--interface=$ifname"
 142 }
 143
 144 append_listenaddress() {
 145         xappend "--listen-address=$1"
 146 }
 147
 148 append_notinterface() {
 149         network_get_device ifname "$1" || ifname="$1"
 150         xappend "--except-interface=$ifname"
 151 }
 152
 153 append_addnhosts() {
 154         xappend "--addn-hosts=$1"
 155 }
 156
 157 append_bogusnxdomain() {
 158         xappend "--bogus-nxdomain=$1"
 159 }
 160
 161 append_pxe_service() {
 162         xappend "--pxe-service=$1"
 163 }
 164
 165 append_interface_name() {
 166         xappend "--interface-name=$1,$2"
 167 }
 168
 169 filter_dnsmasq() {
 170         local cfg="$1" func="$2" match_cfg="$3" found_cfg
 171
 172         # use entry when no instance entry set, or if it matches
 173         config_get found_cfg "$cfg" "instance"
 174         if [ -z "$found_cfg" -o "$found_cfg" = "$match_cfg" ]; then
 175                 $func $cfg
 176         fi
 177 }
 178
 179 dhcp_subscrid_add() {
 180         local cfg="$1"
 181
 182         config_get networkid "$cfg" networkid
 183         [ -n "$networkid" ] || return 0
 184
 185         config_get subscriberid "$cfg" subscriberid
 186         [ -n "$subscriberid" ] || return 0
 187
 188         xappend "--dhcp-subscrid=$networkid,$subscriberid"
 189
 190         config_get_bool force "$cfg" force 0
 191
 192         dhcp_option_add "$cfg" "$networkid" "$force"
 193 }
 194
 195 dhcp_remoteid_add() {
 196         local cfg="$1"
 197
 198         config_get networkid "$cfg" networkid
 199         [ -n "$networkid" ] || return 0
 200
 201         config_get remoteid "$cfg" remoteid
 202         [ -n "$remoteid" ] || return 0
 203
 204         xappend "--dhcp-remoteid=$networkid,$remoteid"
 205
 206         config_get_bool force "$cfg" force 0
 207
 208         dhcp_option_add "$cfg" "$networkid" "$force"
 209 }
 210
 211 dhcp_circuitid_add() {
 212         # TODO: DHCPV6 does not have circuitid; catch "option6:"
 213         local cfg="$1"
 214
 215         config_get networkid "$cfg" networkid
 216         [ -n "$networkid" ] || return 0
 217
 218         config_get circuitid "$cfg" circuitid
 219         [ -n "$circuitid" ] || return 0
 220
 221         xappend "--dhcp-circuitid=$networkid,$circuitid"
 222
 223         config_get_bool force "$cfg" force 0
 224
 225         dhcp_option_add "$cfg" "$networkid" "$force"
 226 }
 227
 228 dhcp_userclass_add() {
 229         local cfg="$1"
 230
 231         config_get networkid "$cfg" networkid
 232         [ -n "$networkid" ] || return 0
 233
 234         config_get userclass "$cfg" userclass
 235         [ -n "$userclass" ] || return 0
 236
 237         xappend "--dhcp-userclass=$networkid,$userclass"
 238
 239         config_get_bool force "$cfg" force 0
 240
 241         dhcp_option_add "$cfg" "$networkid" "$force"
 242 }
 243
 244 dhcp_vendorclass_add() {
 245         # TODO: DHCPV6 vendor class has stricter definitions; catch? fixup?
 246         local cfg="$1"
 247
 248         config_get networkid "$cfg" networkid
 249         [ -n "$networkid" ] || return 0
 250
 251         config_get vendorclass "$cfg" vendorclass
 252         [ -n "$vendorclass" ] || return 0
 253
 254         xappend "--dhcp-vendorclass=$networkid,$vendorclass"
 255
 256         config_get_bool force "$cfg" force 0
 257
 258         dhcp_option_add "$cfg" "$networkid" "$force"
 259 }
 260
 261 dhcp_match_add() {
 262         local cfg="$1"
 263
 264         config_get networkid "$cfg" networkid
 265         [ -n "$networkid" ] || return 0
 266
 267         config_get match "$cfg" match
 268         [ -n "$match" ] || return 0
 269
 270         xappend "--dhcp-match=$networkid,$match"
 271
 272         config_get_bool force "$cfg" force 0
 273
 274         dhcp_option_add "$cfg" "$networkid" "$force"
 275 }
 276
 277 dhcp_host_add() {
 278         local cfg="$1"
 279         local hosttag nametime addrs duids macs tags
 280
 281         config_get_bool force "$cfg" force 0
 282
 283         config_get networkid "$cfg" networkid
 284         [ -n "$networkid" ] && dhcp_option_add "$cfg" "$networkid" "$force"
 285
 286         config_get_bool enable "$cfg" enable 1
 287         [ "$enable" = "0" ] && return 0
 288
 289         config_get name "$cfg" name
 290         config_get ip "$cfg" ip
 291         config_get hostid "$cfg" hostid
 292
 293         [ -n "$ip" -o -n "$name" -o -n "$hostid" ] || return 0
 294
 295         config_get_bool dns "$cfg" dns 0
 296         [ "$dns" = "1" -a -n "$ip" -a -n "$name" ] && {
 297                 echo "$ip $name${DOMAIN:+.$DOMAIN}" >> $HOSTFILE_TMP
 298         }
 299
 300         config_get mac "$cfg" mac
 301         config_get duid "$cfg" duid
 302         config_get tag "$cfg" tag
 303
 304         if [ -n "$mac" ]; then
 305                 # --dhcp-host=00:20:e0:3b:13:af,192.168.0.199,lap
 306                 # many MAC are possible to track a laptop ON/OFF dock
 307                 for m in $mac; do append macs "$m" ","; done
 308         fi
 309
 310         if [ $DNSMASQ_DHCP_VER -eq 6 -a -n "$duid" ]; then
 311                 # --dhcp-host=id:00:03:00:01:12:00:00:01:02:03,[::beef],lap
 312                 # one (virtual) machine gets one DUID per RFC3315
 313                 duids="id:${duid// */}"
 314         fi
 315
 316         if [ -z "$macs" -a -z "$duids" ]; then
 317                 # --dhcp-host=lap,192.168.0.199,[::beef]
 318                 [ -n "$name" ] || return 0
 319                 macs="$name"
 320                 name=""
 321         fi
 322
 323         if [ -n "$hostid" ]; then
 324                 hex_to_hostid hostid "$hostid"
 325         fi
 326
 327         if [ -n "$tag" ]; then
 328                 for t in $tag; do append tags "$t" ",set:"; done
 329         fi
 330
 331         config_get_bool broadcast "$cfg" broadcast 0
 332         config_get leasetime "$cfg" leasetime
 333
 334         [ "$broadcast" = "0" ] && broadcast= || broadcast=",set:needs-broadcast"
 335
 336         hosttag="${networkid:+,set:${networkid}}${tags:+,set:${tags}}$broadcast"
 337         nametime="${name:+,$name}${leasetime:+,$leasetime}"
 338
 339         if [ $DNSMASQ_DHCP_VER -eq 6 ]; then
 340                 addrs="${ip:+,$ip}${hostid:+,[::$hostid]}"
 341                 xappend "--dhcp-host=$macs${duids:+,$duids}$hosttag$addrs$nametime"
 342         else
 343                 xappend "--dhcp-host=$macs$hosttag${ip:+,$ip}$nametime"
 344         fi
 345 }
 346
 347 dhcp_this_host_add() {
 348         local net="$1"
 349         local ifname="$2"
 350         local mode="$3"
 351         local routerstub routername ifdashname
 352         local lanaddr lanaddr6 lanaddrs6 ulaprefix
 353
 354         if [ "$mode" -gt 0 ] ; then
 355                 ifdashname="${ifname//./-}"
 356                 routerstub="$( md5sum /etc/os-release )"
 357                 routerstub="router-${routerstub// */}"
 358                 routername="$( uci_get system @system[0] hostname $routerstub )"
 359
 360                 if [ "$mode" -gt 1 ] ; then
 361                         if [ "$mode" -gt 2 ] ; then
 362                                 if [ "$mode" -gt 3 ] ; then
 363                                         append_interface_name "$ifdashname.$routername.$DOMAIN" "$ifname"
 364                                 fi
 365
 366                                 append_interface_name "$routername.$DOMAIN" "$ifname"
 367                         fi
 368
 369                         # All IP addresses discovered by dnsmasq will be labeled (except fe80::)
 370                         append_interface_name "$routername" "$ifname"
 371
 372                 else
 373                         # This uses a static host file entry for only limited addresses.
 374                         # Use dnsmasq option "--expandhosts" to enable FQDN on host files.
 375                         ulaprefix="$(uci_get network @globals[0] ula_prefix)"
 376                         network_get_ipaddr lanaddr "$net"
 377                         network_get_ipaddrs6 lanaddrs6 "$net"
 378
 379                         if [ -n "$lanaddr" ] ; then
 380                                 dhcp_domain_add "" "$routername" "$lanaddr"
 381                         fi
 382
 383                         if [ -n "$ulaprefix" -a -n "$lanaddrs6" ] ; then
 384                                 for lanaddr6 in $lanaddrs6 ; do
 385                                         case "$lanaddr6" in
 386                                         "${ulaprefix%%:/*}"*)
 387                                                 dhcp_domain_add "" "$routername" "$lanaddr6"
 388                                                 ;;
 389                                         esac
 390                                 done
 391                         fi
 392                 fi
 393         fi
 394 }
 395
 396 dhcp_tag_add() {
 397         # NOTE: dnsmasq has explicit "option6:" prefix for DHCPv6 so no collisions
 398         local cfg="$1"
 399
 400         tag="$cfg"
 401
 402         [ -n "$tag" ] || return 0
 403
 404         config_get_bool force "$cfg" force 0
 405         [ "$force" = "0" ] && force=
 406
 407         config_get option "$cfg" dhcp_option
 408         for o in $option; do
 409                 xappend "--dhcp-option${force:+-force}=tag:$tag,$o"
 410         done
 411 }
 412
 413 dhcp_mac_add() {
 414         local cfg="$1"
 415
 416         config_get networkid "$cfg" networkid
 417         [ -n "$networkid" ] || return 0
 418
 419         config_get mac "$cfg" mac
 420         [ -n "$mac" ] || return 0
 421
 422         xappend "--dhcp-mac=$networkid,$mac"
 423
 424         dhcp_option_add "$cfg" "$networkid"
 425 }
 426
 427 dhcp_boot_add() {
 428         # TODO: BOOTURL is different between DHCPv4 and DHCPv6
 429         local cfg="$1"
 430
 431         config_get networkid "$cfg" networkid
 432
 433         config_get filename "$cfg" filename
 434         [ -n "$filename" ] || return 0
 435
 436         config_get servername "$cfg" servername
 437         config_get serveraddress "$cfg" serveraddress
 438
 439         [ -n "$serveraddress" -a ! -n "$servername" ] && return 0
 440
 441         xappend "--dhcp-boot=${networkid:+net:$networkid,}${filename}${servername:+,$servername}${serveraddress:+,$serveraddress}"
 442
 443         config_get_bool force "$cfg" force 0
 444
 445         dhcp_option_add "$cfg" "$networkid" "$force"
 446 }
 447
 448
 449 dhcp_add() {
 450         local cfg="$1"
 451         local dhcp6range="::"
 452         local nettag
 453         local tags
 454
 455         config_get net "$cfg" interface
 456         [ -n "$net" ] || return 0
 457
 458         config_get networkid "$cfg" networkid
 459         [ -n "$networkid" ] || networkid="$net"
 460
 461         network_get_device ifname "$net" || return 0
 462
 463         [ "$cachelocal" = "0" ] && network_get_dnsserver dnsserver "$net" && {
 464                 DNS_SERVERS="$DNS_SERVERS $dnsserver"
 465         }
 466
 467         append_bool "$cfg" ignore "--no-dhcp-interface=$ifname" && {
 468                 # Many ISP do not have useful names for DHCP customers (your WAN).
 469                 dhcp_this_host_add "$net" "$ifname" "$ADD_WAN_FQDN"
 470                 return 0
 471         }
 472
 473         network_get_subnet subnet "$net" || return 0
 474         network_get_protocol proto "$net" || return 0
 475
 476         # Do not support non-static interfaces for now
 477         [ static = "$proto" ] || return 0
 478
 479         # Override interface netmask with dhcp config if applicable
 480         config_get netmask "$cfg" netmask "${subnet##*/}"
 481
 482         #check for an already active dhcp server on the interface, unless 'force' is set
 483         config_get_bool force "$cfg" force 0
 484         [ $force -gt 0 ] || dhcp_check "$ifname" || return 0
 485
 486         config_get start "$cfg" start 100
 487         config_get limit "$cfg" limit 150
 488         config_get leasetime "$cfg" leasetime 12h
 489         config_get options "$cfg" options
 490         config_get_bool dynamicdhcp "$cfg" dynamicdhcp 1
 491
 492         config_get dhcpv4 "$cfg" dhcpv4
 493         config_get dhcpv6 "$cfg" dhcpv6
 494
 495         config_get ra "$cfg" ra
 496         config_get ra_management "$cfg" ra_management
 497         config_get ra_preference "$cfg" ra_preference
 498         config_get dns "$cfg" dns
 499
 500         config_list_foreach "$cfg" "interface_name" append_interface_name "$ifname"
 501
 502         # Put the router host name on this DHCP served interface address(es)
 503         dhcp_this_host_add "$net" "$ifname" "$ADD_LOCAL_FQDN"
 504
 505         start="$( dhcp_calc "$start" )"
 506
 507         add_tag() {
 508                 tags="${tags}tag:$1,"
 509         }
 510         config_list_foreach "$cfg" tag add_tag
 511
 512         nettag="${networkid:+set:${networkid},}"
 513
 514         if [ "$limit" -gt 0 ] ; then
 515                 limit=$((limit-1))
 516         fi
 517
 518         eval "$(ipcalc.sh "${subnet%%/*}" $netmask $start $limit)"
 519
 520         if [ "$dynamicdhcp" = "0" ] ; then
 521                 END="static"
 522                 dhcp6range="::,static"
 523         else
 524                 dhcp6range="::1000,::ffff"
 525         fi
 526
 527
 528         if [ "$dhcpv4" != "disabled" ] ; then
 529                 xappend "--dhcp-range=$tags$nettag$START,$END,$NETMASK,$leasetime${options:+ $options}"
 530         fi
 531
 532
 533         if [ $DNSMASQ_DHCP_VER -eq 6 -a "$ra" = "server" ] ; then
 534                 # Note: dnsmasq cannot just be a DHCPv6 server (all-in-1)
 535                 # and let some other machine(s) send RA pointing to it.
 536
 537                 case $ra_preference in
 538                 *high*)
 539                         xappend "--ra-param=$ifname,high,0,7200"
 540                         ;;
 541                 *low*)
 542                         xappend "--ra-param=$ifname,low,0,7200"
 543                         ;;
 544                 *)
 545                         # Send UNSOLICITED RA at default interval and live for 2 hours.
 546                         # TODO: convert flexible lease time into route life time (only seconds).
 547                         xappend "--ra-param=$ifname,0,7200"
 548                         ;;
 549                 esac
 550
 551                 if [ "$dhcpv6" = "disabled" ] ; then
 552                         ra_management="3"
 553                 fi
 554
 555
 556                 case $ra_management in
 557                 0)
 558                         # SLACC with DCHP for extended options
 559                         xappend "--dhcp-range=$nettag::,constructor:$ifname,ra-stateless,ra-names"
 560                         ;;
 561                 2)
 562                         # DHCP address and RA only for management redirection
 563                         xappend "--dhcp-range=$nettag$dhcp6range,constructor:$ifname,$leasetime"
 564                         ;;
 565                 3)
 566                         # SLAAC only but dnsmasq attempts to link HOSTNAME, DHCPv4 MAC, and SLAAC
 567                         xappend "--dhcp-range=$nettag::,constructor:$ifname,ra-only,ra-names"
 568                         ;;
 569                 *)
 570                         # SLAAC and full DHCP
 571                         xappend "--dhcp-range=$nettag$dhcp6range,constructor:$ifname,slaac,ra-names,$leasetime"
 572                         ;;
 573                 esac
 574
 575                 if [ -n "$dns" ]; then
 576                         dnss=""
 577                         for d in $dns; do append dnss "[$d]" ","; done
 578                 else
 579                         dnss="[::]"
 580                 fi
 581
 582                 dhcp_option_append "option6:dns-server,$dnss" "$networkid"
 583         fi
 584
 585         dhcp_option_add "$cfg" "$networkid" 0
 586         dhcp_option_add "$cfg" "$networkid" 2
 587 }
 588
 589 dhcp_option_append() {
 590         local option="$1"
 591         local networkid="$2"
 592         local force="$3"
 593
 594         xappend "--dhcp-option${force:+-force}=${networkid:+$networkid,}$option"
 595 }
 596
 597 dhcp_option_add() {
 598         # NOTE: dnsmasq has explicit "option6:" prefix for DHCPv6 so no collisions
 599         local cfg="$1"
 600         local networkid="$2"
 601         local force="$3"
 602         local opt="dhcp_option"
 603
 604         [ "$force" = "0" ] && force=
 605         [ "$force" = "2" ] && opt="dhcp_option_force"
 606
 607         local list_len
 608         config_get list_len "$cfg" "${opt}_LENGTH"
 609
 610         if [ -n "$list_len" ]; then
 611                 config_list_foreach "$cfg" "$opt" dhcp_option_append "$networkid" "$force"
 612         else
 613                 config_get dhcp_option "$cfg" "$opt"
 614
 615                 [ -n "$dhcp_option" ] && echo "Warning: the 'option $opt' syntax is deprecated, use 'list $opt'" >&2
 616
 617                 local option
 618                 for option in $dhcp_option; do
 619                         dhcp_option_append "$option" "$networkid" "$force"
 620                 done
 621         fi
 622 }
 623
 624 dhcp_domain_add() {
 625         local cfg="$1"
 626         local ip name names record
 627
 628         config_get names "$cfg" name "$2"
 629         [ -n "$names" ] || return 0
 630
 631         config_get ip "$cfg" ip "$3"
 632         [ -n "$ip" ] || return 0
 633
 634         for name in $names; do
 635                 record="${record:+$record }$name"
 636         done
 637
 638         echo "$ip $record" >> $HOSTFILE_TMP
 639 }
 640
 641 dhcp_srv_add() {
 642         local cfg="$1"
 643
 644         config_get srv "$cfg" srv
 645         [ -n "$srv" ] || return 0
 646
 647         config_get target "$cfg" target
 648         [ -n "$target" ] || return 0
 649
 650         config_get port "$cfg" port
 651         [ -n "$port" ] || return 0
 652
 653         config_get class "$cfg" class
 654         config_get weight "$cfg" weight
 655
 656         local service="$srv,$target,$port${class:+,$class${weight:+,$weight}}"
 657
 658         xappend "--srv-host=$service"
 659 }
 660
 661 dhcp_mx_add() {
 662         local cfg="$1"
 663         local domain relay pref
 664
 665         config_get domain "$cfg" domain
 666         [ -n "$domain" ] || return 0
 667
 668         config_get relay "$cfg" relay
 669         [ -n "$relay" ] || return 0
 670
 671         config_get pref "$cfg" pref 0
 672
 673         local service="$domain,$relay,$pref"
 674
 675         xappend "--mx-host=$service"
 676 }
 677
 678 dhcp_cname_add() {
 679         local cfg="$1"
 680         local cname target
 681
 682         config_get cname "$cfg" cname
 683         [ -n "$cname" ] || return 0
 684
 685         config_get target "$cfg" target
 686         [ -n "$target" ] || return 0
 687
 688         xappend "--cname=${cname},${target}"
 689 }
 690
 691 dhcp_hostrecord_add() {
 692         local cfg="$1"
 693         local names addresses record val
 694
 695         config_get names "$cfg" name "$2"
 696         if [ -z "$names" ]; then
 697                 return 0
 698         fi
 699
 700         config_get addresses "$cfg" ip "$3"
 701         if [ -z "$addresses" ]; then
 702                 return 0
 703         fi
 704
 705         for val in $names $addresses; do
 706                 record="${record:+$record,}$val"
 707         done
 708
 709         xappend "--host-record=$record"
 710 }
 711
 712 dhcp_relay_add() {
 713         local cfg="$1"
 714         local local_addr server_addr interface
 715
 716         config_get local_addr "$cfg" local_addr
 717         [ -n "$local_addr" ] || return 0
 718
 719         config_get server_addr "$cfg" server_addr
 720         [ -n "$server_addr" ] || return 0
 721
 722         config_get interface "$cfg" interface
 723         if [ -z "$interface" ]; then
 724                 xappend "--dhcp-relay=$local_addr,$server_addr"
 725         else
 726                 network_get_device ifname "$interface" || return
 727                 xappend "--dhcp-relay=$local_addr,$server_addr,$ifname"
 728         fi
 729 }
 730
 731 dnsmasq_start()
 732 {
 733         local cfg="$1" disabled resolvfile user_dhcpscript
 734
 735         config_get_bool disabled "$cfg" disabled 0
 736         [ "$disabled" -gt 0 ] && return 0
 737
 738         # reset list of DOMAINS and DNS servers (for each dnsmasq instance)
 739         DNS_SERVERS=""
 740         DOMAIN=""
 741         CONFIGFILE="${BASECONFIGFILE}.${cfg}"
 742         CONFIGFILE_TMP="${CONFIGFILE}.$$"
 743         HOSTFILE="${BASEHOSTFILE}.${cfg}"
 744         HOSTFILE_TMP="${HOSTFILE}.$$"
 745         BASEDHCPSTAMPFILE_CFG="${BASEDHCPSTAMPFILE}.${cfg}"
 746
 747         # before we can call xappend
 748         mkdir -p /var/run/dnsmasq/
 749         mkdir -p $(dirname $CONFIGFILE)
 750         mkdir -p $(dirname $HOSTFILE)
 751         mkdir -p /var/lib/misc
 752         chown dnsmasq:dnsmasq /var/run/dnsmasq
 753
 754         echo "# auto-generated config file from /etc/config/dhcp" > $CONFIGFILE_TMP
 755         echo "# auto-generated config file from /etc/config/dhcp" > $HOSTFILE_TMP
 756
 757         local dnsmasqconffile="/etc/dnsmasq.${cfg}.conf"
 758         if [ ! -r "$dnsmasqconffile" ]; then
 759                 dnsmasqconffile=/etc/dnsmasq.conf
 760         fi
 761
 762         # if we did this last, we could override auto-generated config
 763         [ -f "${dnsmasqconffile}" ] && {
 764                 xappend "--conf-file=${dnsmasqconffile}"
 765         }
 766
 767         $PROG --version | grep -osqE "^Compile time options:.* DHCPv6( |$)" && DHCPv6CAPABLE=1 || DHCPv6CAPABLE=0
 768
 769
 770         if [ -x /usr/sbin/odhcpd -a -x /etc/init.d/odhcpd ] ; then
 771                 local odhcpd_is_main odhcpd_is_enabled
 772                 config_get odhcpd_is_main odhcpd maindhcp 0
 773                 /etc/init.d/odhcpd enabled && odhcpd_is_enabled=1 || odhcpd_is_enabled=0
 774
 775
 776                 if [ "$odhcpd_is_enabled" -eq 0 -a "$DHCPv6CAPABLE" -eq 1 ] ; then
 777                         # DHCP V4 and V6 in DNSMASQ
 778                         DNSMASQ_DHCP_VER=6
 779                 elif [ "$odhcpd_is_main" -gt 0 ] ; then
 780                         # ODHCPD is doing it all
 781                         DNSMASQ_DHCP_VER=0
 782                 else
 783                         # You have ODHCPD but use DNSMASQ for DHCPV4
 784                         DNSMASQ_DHCP_VER=4
 785                 fi
 786
 787         elif [ "$DHCPv6CAPABLE" -eq 1 ] ; then
 788                 # DHCP V4 and V6 in DNSMASQ
 789                 DNSMASQ_DHCP_VER=6
 790         else
 791                 DNSMASQ_DHCP_VER=4
 792         fi
 793
 794         # Allow DHCP/DHCPv6 to be handled by ISC DHCPD
 795         if [ -x /usr/sbin/dhcpd ] ; then
 796                 if [ -x /etc/init.d/dhcpd ] ; then
 797                         /etc/init.d/dhcpd enabled && DNSMASQ_DHCP_VER=0
 798                 fi
 799                 if [ -x /etc/init.d/dhcpd6 -a "$DNSMASQ_DHCP_VER" -gt 0 ] ; then
 800                         /etc/init.d/dhcpd6 enabled && DNSMASQ_DHCP_VER=4
 801                 fi
 802         fi
 803
 804         append_bool "$cfg" authoritative "--dhcp-authoritative"
 805         append_bool "$cfg" nodaemon "--no-daemon"
 806         append_bool "$cfg" domainneeded "--domain-needed"
 807         append_bool "$cfg" filterwin2k "--filterwin2k"
 808         append_bool "$cfg" nohosts "--no-hosts"
 809         append_bool "$cfg" nonegcache "--no-negcache"
 810         append_bool "$cfg" strictorder "--strict-order"
 811         append_bool "$cfg" logqueries "--log-queries=extra"
 812         append_bool "$cfg" noresolv "--no-resolv"
 813         append_bool "$cfg" localise_queries "--localise-queries"
 814         append_bool "$cfg" readethers "--read-ethers"
 815         append_bool "$cfg" dbus "--enable-dbus"
 816         append_bool "$cfg" expandhosts "--expand-hosts"
 817         config_get tftp_root "$cfg" "tftp_root"
 818         [ -n "$tftp_root" ] && mkdir -p "$tftp_root" && append_bool "$cfg" enable_tftp "--enable-tftp"
 819         append_bool "$cfg" tftp_no_fail "--tftp-no-fail"
 820         append_bool "$cfg" nonwildcard "--bind-dynamic" 1
 821         append_bool "$cfg" fqdn "--dhcp-fqdn"
 822         append_bool "$cfg" proxydnssec "--proxy-dnssec"
 823         append_bool "$cfg" localservice "--local-service"
 824         append_bool "$cfg" logdhcp "--log-dhcp"
 825         append_bool "$cfg" quietdhcp "--quiet-dhcp"
 826         append_bool "$cfg" sequential_ip "--dhcp-sequential-ip"
 827         append_bool "$cfg" allservers "--all-servers"
 828         append_bool "$cfg" noping "--no-ping"
 829
 830         append_parm "$cfg" logfacility "--log-facility"
 831
 832         append_parm "$cfg" cachesize "--cache-size"
 833         append_parm "$cfg" dnsforwardmax "--dns-forward-max"
 834         append_parm "$cfg" port "--port"
 835         append_parm "$cfg" ednspacket_max "--edns-packet-max"
 836         append_parm "$cfg" dhcpleasemax "--dhcp-lease-max"
 837         append_parm "$cfg" "queryport" "--query-port"
 838         append_parm "$cfg" "minport" "--min-port"
 839         append_parm "$cfg" "maxport" "--max-port"
 840         append_parm "$cfg" "domain" "--domain"
 841         append_parm "$cfg" "local" "--server"
 842         config_list_foreach "$cfg" "listen_address" append_listenaddress
 843         config_list_foreach "$cfg" "server" append_server
 844         config_list_foreach "$cfg" "rev_server" append_rev_server
 845         config_list_foreach "$cfg" "address" append_address
 846         config_list_foreach "$cfg" "ipset" append_ipset
 847         config_list_foreach "$cfg" "interface" append_interface
 848         config_list_foreach "$cfg" "notinterface" append_notinterface
 849         config_list_foreach "$cfg" "addnhosts" append_addnhosts
 850         config_list_foreach "$cfg" "bogusnxdomain" append_bogusnxdomain
 851         append_parm "$cfg" "leasefile" "--dhcp-leasefile" "/tmp/dhcp.leases"
 852         append_parm "$cfg" "serversfile" "--servers-file"
 853         append_parm "$cfg" "tftp_root" "--tftp-root"
 854         append_parm "$cfg" "dhcp_boot" "--dhcp-boot"
 855         append_parm "$cfg" "local_ttl" "--local-ttl"
 856         append_parm "$cfg" "pxe_prompt" "--pxe-prompt"
 857         config_list_foreach "$cfg" "pxe_service" append_pxe_service
 858         config_get DOMAIN "$cfg" domain
 859
 860         config_get_bool ADD_LOCAL_DOMAIN "$cfg" add_local_domain 1
 861         config_get_bool ADD_LOCAL_HOSTNAME "$cfg" add_local_hostname 1
 862         config_get ADD_LOCAL_FQDN "$cfg" add_local_fqdn ""
 863         config_get ADD_WAN_FQDN "$cfg" add_wan_fqdn 0
 864
 865         if [ -z "$ADD_LOCAL_FQDN" ] ; then
 866                 # maintain support for previous UCI
 867                 ADD_LOCAL_FQDN="$ADD_LOCAL_HOSTNAME"
 868         fi
 869
 870         config_get_bool readethers "$cfg" readethers
 871         [ "$readethers" = "1" -a \! -e "/etc/ethers" ] && touch /etc/ethers
 872
 873         config_get user_dhcpscript $cfg dhcpscript
 874         if has_handler || [ -n "$user_dhcpscript" ]; then
 875                 xappend "--dhcp-script=$DHCPSCRIPT"
 876         fi
 877
 878         config_get leasefile $cfg leasefile "/tmp/dhcp.leases"
 879         [ -n "$leasefile" -a \! -e "$leasefile" ] && touch "$leasefile"
 880         config_get_bool cachelocal "$cfg" cachelocal 1
 881
 882         config_get_bool noresolv "$cfg" noresolv 0
 883         if [ "$noresolv" != "1" ]; then
 884                 config_get resolvfile "$cfg" resolvfile "/tmp/resolv.conf.auto"
 885                 # So jail doesn't complain if file missing
 886                 [ -n "$resolvfile" -a \! -e "$resolvfile" ] && touch "$resolvfile"
 887         fi
 888
 889         [ -n "$resolvfile" ] && xappend "--resolv-file=$resolvfile"
 890
 891         config_get hostsfile "$cfg" dhcphostsfile
 892         [ -e "$hostsfile" ] && xappend "--dhcp-hostsfile=$hostsfile"
 893
 894         local rebind
 895         config_get_bool rebind "$cfg" rebind_protection 1
 896         [ $rebind -gt 0 ] && {
 897                 log_once \
 898                         "DNS rebinding protection is active," \
 899                         "will discard upstream RFC1918 responses!"
 900                 xappend "--stop-dns-rebind"
 901
 902                 local rebind_localhost
 903                 config_get_bool rebind_localhost "$cfg" rebind_localhost 0
 904                 [ $rebind_localhost -gt 0 ] && {
 905                         log_once "Allowing 127.0.0.0/8 responses"
 906                         xappend "--rebind-localhost-ok"
 907                 }
 908
 909                 append_rebind_domain() {
 910                         log_once "Allowing RFC1918 responses for domain $1"
 911                         xappend "--rebind-domain-ok=$1"
 912                 }
 913
 914                 config_list_foreach "$cfg" rebind_domain append_rebind_domain
 915         }
 916
 917         config_get_bool dnssec "$cfg" dnssec 0
 918         [ "$dnssec" -gt 0 ] && {
 919                 xappend "--conf-file=$TRUSTANCHORSFILE"
 920                 xappend "--dnssec"
 921                 [ -x /etc/init.d/sysntpd ] && {
 922                         /etc/init.d/sysntpd enabled
 923                         [ "$?" -ne 0 -o "$(uci_get system.ntp.enabled)" = "1" ] && {
 924                                 [ -f "$TIMEVALIDFILE" ] || xappend "--dnssec-no-timecheck"
 925                         }
 926                 }
 927                 append_bool "$cfg" dnsseccheckunsigned "--dnssec-check-unsigned"
 928         }
 929
 930         config_get addmac "$cfg" addmac 0
 931         [ "$addmac" != "0" ] && {
 932                 [ "$addmac" = "1" ] && addmac=
 933                 xappend "--add-mac${addmac:+="$addmac"}"
 934         }
 935
 936         dhcp_option_add "$cfg" "" 0
 937         dhcp_option_add "$cfg" "" 2
 938
 939         xappend "--dhcp-broadcast=tag:needs-broadcast"
 940
 941         xappend "--addn-hosts=$(dirname $HOSTFILE)"
 942
 943         config_get dnsmasqconfdir "$cfg" confdir "/tmp/dnsmasq.d"
 944         xappend "--conf-dir=$dnsmasqconfdir"
 945         dnsmasqconfdir="${dnsmasqconfdir%%,*}"
 946         [ ! -d "$dnsmasqconfdir" ] && mkdir -p $dnsmasqconfdir
 947         xappend "--user=dnsmasq"
 948         xappend "--group=dnsmasq"
 949         echo >> $CONFIGFILE_TMP
 950
 951         config_get_bool enable_tftp "$cfg" enable_tftp 0
 952         [ "$enable_tftp" -gt 0 ] && {
 953                 config_get tftp_root "$cfg" tftp_root
 954                 append EXTRA_MOUNT $tftp_root
 955         }
 956
 957         config_foreach filter_dnsmasq host dhcp_host_add "$cfg"
 958         echo >> $CONFIGFILE_TMP
 959         config_foreach filter_dnsmasq boot dhcp_boot_add "$cfg"
 960         config_foreach filter_dnsmasq mac dhcp_mac_add "$cfg"
 961         config_foreach filter_dnsmasq tag dhcp_tag_add "$cfg"
 962         config_foreach filter_dnsmasq vendorclass dhcp_vendorclass_add "$cfg"
 963         config_foreach filter_dnsmasq userclass dhcp_userclass_add "$cfg"
 964         config_foreach filter_dnsmasq circuitid dhcp_circuitid_add "$cfg"
 965         config_foreach filter_dnsmasq remoteid dhcp_remoteid_add "$cfg"
 966         config_foreach filter_dnsmasq subscrid dhcp_subscrid_add "$cfg"
 967         config_foreach filter_dnsmasq match dhcp_match_add "$cfg"
 968         config_foreach filter_dnsmasq domain dhcp_domain_add "$cfg"
 969         config_foreach filter_dnsmasq hostrecord dhcp_hostrecord_add "$cfg"
 970         config_foreach filter_dnsmasq relay dhcp_relay_add "$cfg"
 971
 972         echo >> $CONFIGFILE_TMP
 973         config_foreach filter_dnsmasq srvhost dhcp_srv_add "$cfg"
 974         config_foreach filter_dnsmasq mxhost dhcp_mx_add "$cfg"
 975         echo >> $CONFIGFILE_TMP
 976
 977         config_get_bool boguspriv "$cfg" boguspriv 1
 978         [ "$boguspriv" -gt 0 ] && {
 979                 xappend "--bogus-priv"
 980                 [ -r "$RFC6761FILE" ] && xappend "--conf-file=$RFC6761FILE"
 981         }
 982
 983         if [ "$DNSMASQ_DHCP_VER" -gt 4 ] ; then
 984                 # Enable RA feature for when/if it is constructed,
 985                 # and RA is selected per interface pool (RA, DHCP, or both),
 986                 # but no one (should) want RA broadcast in syslog
 987                 config_foreach filter_dnsmasq dhcp dhcp_add "$cfg"
 988                 xappend "--enable-ra"
 989                 xappend "--quiet-ra"
 990                 append_bool "$cfg" quietdhcp "--quiet-dhcp6"
 991
 992         elif [ "$DNSMASQ_DHCP_VER" -gt 0 ] ; then
 993                 config_foreach filter_dnsmasq dhcp dhcp_add "$cfg"
 994         fi
 995
 996
 997         echo >> $CONFIGFILE_TMP
 998         config_foreach filter_dnsmasq cname dhcp_cname_add "$cfg"
 999         echo >> $CONFIGFILE_TMP
1000
1001         echo >> $CONFIGFILE_TMP
1002         mv -f $CONFIGFILE_TMP $CONFIGFILE
1003         mv -f $HOSTFILE_TMP $HOSTFILE
1004
1005         [ "$resolvfile" = "/tmp/resolv.conf.auto" ] && {
1006                 rm -f /tmp/resolv.conf
1007                 [ $ADD_LOCAL_DOMAIN -eq 1 ] && [ -n "$DOMAIN" ] && {
1008                         echo "search $DOMAIN" >> /tmp/resolv.conf
1009                 }
1010                 DNS_SERVERS="$DNS_SERVERS 127.0.0.1"
1011                 for DNS_SERVER in $DNS_SERVERS ; do
1012                         echo "nameserver $DNS_SERVER" >> /tmp/resolv.conf
1013                 done
1014         }
1015
1016         procd_open_instance $cfg
1017         procd_set_param command $PROG -C $CONFIGFILE -k -x /var/run/dnsmasq/dnsmasq."${cfg}".pid
1018         procd_set_param file $CONFIGFILE
1019         [ -n "$user_dhcpscript" ] && procd_set_param env USER_DHCPSCRIPT="$user_dhcpscript"
1020         procd_set_param respawn
1021
1022         procd_add_jail dnsmasq ubus log
1023         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
1024         procd_add_jail_mount_rw /var/run/dnsmasq/ $leasefile
1025
1026         procd_close_instance
1027 }
1028
1029 dnsmasq_stop()
1030 {
1031         local cfg="$1" resolvfile
1032
1033         config_get resolvfile "$cfg" "resolvfile"
1034
1035         #relink /tmp/resolve.conf only for main instance
1036         [ "$resolvfile" = "/tmp/resolv.conf.auto" ] && {
1037                 [ -f /tmp/resolv.conf ] && {
1038                         rm -f /tmp/resolv.conf
1039                         ln -s "$resolvfile" /tmp/resolv.conf
1040                 }
1041         }
1042
1043         rm -f ${BASEDHCPSTAMPFILE}.${cfg}.*.dhcp
1044 }
1045
1046 add_interface_trigger()
1047 {
1048         local interface ignore
1049
1050         config_get interface "$1" interface
1051         config_get_bool ignore "$1" ignore 0
1052
1053         [ -n "$interface" -a $ignore -eq 0 ] && procd_add_interface_trigger "interface.*" "$interface" /etc/init.d/dnsmasq reload
1054 }
1055
1056 service_triggers()
1057 {
1058         procd_add_reload_trigger "dhcp" "system"
1059
1060         config_load dhcp
1061         config_foreach add_interface_trigger dhcp
1062 }
1063
1064 boot()
1065 {
1066         BOOT=1
1067         start "$@"
1068 }
1069
1070 start_service() {
1071         local instance="$1"
1072         local instance_found=0
1073
1074         [ -n "$BOOT" ] && return
1075
1076         . /lib/functions/network.sh
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                 [ "$instance_found" -gt 0 ] || return
1092                 dnsmasq_start "$instance"
1093         else
1094                 config_foreach dnsmasq_start dnsmasq
1095         fi
1096 }
1097
1098 reload_service() {
1099         rc_procd start_service "$@"
1100         procd_send_signal dnsmasq "$@"
1101 }
1102
1103 stop_service() {
1104         local instance="$1"
1105         local instance_found=0
1106
1107         config_cb() {
1108                 local type="$1"
1109                 local name="$2"
1110                 if [ "$type" = "dnsmasq" ]; then
1111                         if [ -n "$instance" -a "$instance" = "$name" ]; then
1112                                 instance_found=1
1113                         fi
1114                 fi
1115         }
1116
1117         config_load dhcp
1118
1119         if [ -n "$instance" ]; then
1120                 [ "$instance_found" -gt 0 ] || return
1121                 dnsmasq_stop "$instance"
1122         else
1123                 config_foreach dnsmasq_stop dnsmasq
1124         fi
1125 }