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 DHCPBOGUSHOSTNAMEFILE="/usr/share/dnsmasq/dhcpbogushostname.conf"
  20 RFC6761FILE="/usr/share/dnsmasq/rfc6761.conf"
  21 DHCPSCRIPT="/usr/lib/dnsmasq/dhcp-script.sh"
  22
  23 DNSMASQ_DHCP_VER=4
  24
  25 dnsmasq_ignore_opt() {
  26         local opt="$1"
  27
  28         if [ -z "$dnsmasq_features" ]; then
  29                 dnsmasq_features="$(dnsmasq --version | grep -m1 'Compile time options:' | cut -d: -f2) "
  30                 [ "${dnsmasq_features#* DHCP }" = "$dnsmasq_features" ] || dnsmasq_has_dhcp=1
  31                 [ "${dnsmasq_features#* DHCPv6 }" = "$dnsmasq_features" ] || dnsmasq_has_dhcp6=1
  32                 [ "${dnsmasq_features#* DNSSEC }" = "$dnsmasq_features" ] || dnsmasq_has_dnssec=1
  33                 [ "${dnsmasq_features#* TFTP }" = "$dnsmasq_features" ] || dnsmasq_has_tftp=1
  34                 [ "${dnsmasq_features#* ipset }" = "$dnsmasq_features" ] || dnsmasq_has_ipset=1
  35         fi
  36
  37         case "$opt" in
  38                 dhcp-duid|\
  39                 ra-param)
  40                         [ -z "$dnsmasq_has_dhcp6" ] ;;
  41                 dhcp-*|\
  42                 bootp-*|\
  43                 pxe-*)
  44                         [ -z "$dnsmasq_has_dhcp" ] ;;
  45                 dnssec-*|\
  46                 trust-anchor)
  47                         [ -z "$dnsmasq_has_dnssec" ] ;;
  48                 tftp-*)
  49                         [ -z "$dnsmasq_has_tftp" ] ;;
  50                 ipset)
  51                         [ -z "$dnsmasq_has_ipset" ] ;;
  52                 *)
  53                         return 1
  54         esac
  55 }
  56
  57 xappend() {
  58         local value="${1#--}"
  59         local opt="${value%%=*}"
  60
  61         if ! dnsmasq_ignore_opt "$opt"; then
  62                 echo "$value" >>$CONFIGFILE_TMP
  63         fi
  64 }
  65
  66 hex_to_hostid() {
  67         local var="$1"
  68         local hex="${2#0x}" # strip optional "0x" prefix
  69
  70         if [ -n "${hex//[0-9a-fA-F]/}" ]; then
  71                 # is invalid hex literal
  72                 return 1
  73         fi
  74
  75         # convert into host id
  76         export "$var=$(
  77                 printf "%0x:%0x" \
  78                 $(((0x$hex >> 16) % 65536)) \
  79                 $(( 0x$hex        % 65536))
  80                 )"
  81
  82         return 0
  83 }
  84
  85 dhcp_calc() {
  86         local ip="$1"
  87         local res=0
  88
  89         while [ -n "$ip" ]; do
  90                 part="${ip%%.*}"
  91                 res="$(($res * 256))"
  92                 res="$(($res + $part))"
  93                 [ "${ip%.*}" != "$ip" ] && ip="${ip#*.}" || ip=
  94         done
  95         echo "$res"
  96 }
  97
  98 dhcp_check() {
  99         local ifname="$1"
 100         local stamp="${BASEDHCPSTAMPFILE_CFG}.${ifname}.dhcp"
 101         local rv=0
 102
 103         [ -s "$stamp" ] && return $(cat "$stamp")
 104
 105         # If there's no carrier yet, skip this interface.
 106         # The init script will be called again once the link is up
 107         case "$(devstatus "$ifname" | jsonfilter -e @.carrier)" in
 108                 false) return 1;;
 109         esac
 110
 111         udhcpc -n -q -s /bin/true -t 1 -i "$ifname" >&- && rv=1 || rv=0
 112
 113         echo $rv > "$stamp"
 114         return $rv
 115 }
 116
 117 log_once() {
 118         pidof dnsmasq >/dev/null || \
 119                 logger -t dnsmasq "$@"
 120 }
 121
 122 has_handler() {
 123         local file
 124
 125         for file in /etc/hotplug.d/dhcp/* /etc/hotplug.d/tftp/* /etc/hotplug.d/neigh/*; do
 126                 [ -f "$file" ] && return 0
 127         done
 128
 129         return 1
 130 }
 131
 132 append_bool() {
 133         local section="$1"
 134         local option="$2"
 135         local value="$3"
 136         local default="$4"
 137         local _loctmp
 138         [ -z "$default" ] && default="0"
 139         config_get_bool _loctmp "$section" "$option" "$default"
 140         [ $_loctmp -gt 0 ] && xappend "$value"
 141 }
 142
 143 append_parm() {
 144         local section="$1"
 145         local option="$2"
 146         local switch="$3"
 147         local default="$4"
 148         local _loctmp
 149         config_get _loctmp "$section" "$option" "$default"
 150         [ -z "$_loctmp" ] && return 0
 151         xappend "$switch=$_loctmp"
 152 }
 153
 154 append_server() {
 155         xappend "--server=$1"
 156 }
 157
 158 append_rev_server() {
 159         xappend "--rev-server=$1"
 160 }
 161
 162 append_address() {
 163         xappend "--address=$1"
 164 }
 165
 166 append_ipset() {
 167         xappend "--ipset=$1"
 168 }
 169
 170 append_interface() {
 171         network_get_device ifname "$1" || ifname="$1"
 172         xappend "--interface=$ifname"
 173 }
 174
 175 append_listenaddress() {
 176         xappend "--listen-address=$1"
 177 }
 178
 179 append_notinterface() {
 180         network_get_device ifname "$1" || ifname="$1"
 181         xappend "--except-interface=$ifname"
 182 }
 183
 184 append_addnhosts() {
 185         xappend "--addn-hosts=$1"
 186 }
 187
 188 append_bogusnxdomain() {
 189         xappend "--bogus-nxdomain=$1"
 190 }
 191
 192 append_pxe_service() {
 193         xappend "--pxe-service=$1"
 194 }
 195
 196 append_interface_name() {
 197         xappend "--interface-name=$1,$2"
 198 }
 199
 200 filter_dnsmasq() {
 201         local cfg="$1" func="$2" match_cfg="$3" found_cfg
 202
 203         # use entry when no instance entry set, or if it matches
 204         config_get found_cfg "$cfg" "instance"
 205         if [ -z "$found_cfg" ] || [ "$found_cfg" = "$match_cfg" ]; then
 206                 $func $cfg
 207         fi
 208 }
 209
 210 dhcp_subscrid_add() {
 211         local cfg="$1"
 212
 213         config_get networkid "$cfg" networkid
 214         [ -n "$networkid" ] || return 0
 215
 216         config_get subscriberid "$cfg" subscriberid
 217         [ -n "$subscriberid" ] || return 0
 218
 219         xappend "--dhcp-subscrid=$networkid,$subscriberid"
 220
 221         config_get_bool force "$cfg" force 0
 222
 223         dhcp_option_add "$cfg" "$networkid" "$force"
 224 }
 225
 226 dhcp_remoteid_add() {
 227         local cfg="$1"
 228
 229         config_get networkid "$cfg" networkid
 230         [ -n "$networkid" ] || return 0
 231
 232         config_get remoteid "$cfg" remoteid
 233         [ -n "$remoteid" ] || return 0
 234
 235         xappend "--dhcp-remoteid=$networkid,$remoteid"
 236
 237         config_get_bool force "$cfg" force 0
 238
 239         dhcp_option_add "$cfg" "$networkid" "$force"
 240 }
 241
 242 dhcp_circuitid_add() {
 243         # TODO: DHCPV6 does not have circuitid; catch "option6:"
 244         local cfg="$1"
 245
 246         config_get networkid "$cfg" networkid
 247         [ -n "$networkid" ] || return 0
 248
 249         config_get circuitid "$cfg" circuitid
 250         [ -n "$circuitid" ] || return 0
 251
 252         xappend "--dhcp-circuitid=$networkid,$circuitid"
 253
 254         config_get_bool force "$cfg" force 0
 255
 256         dhcp_option_add "$cfg" "$networkid" "$force"
 257 }
 258
 259 dhcp_userclass_add() {
 260         local cfg="$1"
 261
 262         config_get networkid "$cfg" networkid
 263         [ -n "$networkid" ] || return 0
 264
 265         config_get userclass "$cfg" userclass
 266         [ -n "$userclass" ] || return 0
 267
 268         xappend "--dhcp-userclass=$networkid,$userclass"
 269
 270         config_get_bool force "$cfg" force 0
 271
 272         dhcp_option_add "$cfg" "$networkid" "$force"
 273 }
 274
 275 dhcp_vendorclass_add() {
 276         # TODO: DHCPV6 vendor class has stricter definitions; catch? fixup?
 277         local cfg="$1"
 278
 279         config_get networkid "$cfg" networkid
 280         [ -n "$networkid" ] || return 0
 281
 282         config_get vendorclass "$cfg" vendorclass
 283         [ -n "$vendorclass" ] || return 0
 284
 285         xappend "--dhcp-vendorclass=$networkid,$vendorclass"
 286
 287         config_get_bool force "$cfg" force 0
 288
 289         dhcp_option_add "$cfg" "$networkid" "$force"
 290 }
 291
 292 dhcp_match_add() {
 293         local cfg="$1"
 294
 295         config_get networkid "$cfg" networkid
 296         [ -n "$networkid" ] || return 0
 297
 298         config_get match "$cfg" match
 299         [ -n "$match" ] || return 0
 300
 301         xappend "--dhcp-match=$networkid,$match"
 302
 303         config_get_bool force "$cfg" force 0
 304
 305         dhcp_option_add "$cfg" "$networkid" "$force"
 306 }
 307
 308 dhcp_host_add() {
 309         local cfg="$1"
 310         local hosttag nametime addrs duids macs tags
 311
 312         config_get_bool force "$cfg" force 0
 313
 314         config_get networkid "$cfg" networkid
 315         [ -n "$networkid" ] && dhcp_option_add "$cfg" "$networkid" "$force"
 316
 317         config_get_bool enable "$cfg" enable 1
 318         [ "$enable" = "0" ] && return 0
 319
 320         config_get name "$cfg" name
 321         config_get ip "$cfg" ip
 322         config_get hostid "$cfg" hostid
 323
 324         [ -z "$ip" ] && [ -z "$name" ] && [ -z "$hostid" ] && return 0
 325
 326         config_get_bool dns "$cfg" dns 0
 327         [ "$dns" = "1" ] && [ -n "$ip" ] && [ -n "$name" ] && {
 328                 echo "$ip $name${DOMAIN:+.$DOMAIN}" >> $HOSTFILE_TMP
 329         }
 330
 331         config_get mac "$cfg" mac
 332         config_get duid "$cfg" duid
 333         config_get tag "$cfg" tag
 334
 335         if [ -n "$mac" ]; then
 336                 # --dhcp-host=00:20:e0:3b:13:af,192.168.0.199,lap
 337                 # many MAC are possible to track a laptop ON/OFF dock
 338                 for m in $mac; do append macs "$m" ","; done
 339         fi
 340
 341         if [ $DNSMASQ_DHCP_VER -eq 6 ] && [ -n "$duid" ]; then
 342                 # --dhcp-host=id:00:03:00:01:12:00:00:01:02:03,[::beef],lap
 343                 # one (virtual) machine gets one DUID per RFC3315
 344                 duids="id:${duid// */}"
 345         fi
 346
 347         if [ -z "$macs" ] && [ -z "$duids" ]; then
 348                 # --dhcp-host=lap,192.168.0.199,[::beef]
 349                 [ -n "$name" ] || return 0
 350                 macs="$name"
 351                 name=""
 352         fi
 353
 354         if [ -n "$hostid" ]; then
 355                 hex_to_hostid hostid "$hostid"
 356         fi
 357
 358         if [ -n "$tag" ]; then
 359                 for t in $tag; do append tags "$t" ",set:"; done
 360         fi
 361
 362         config_get_bool broadcast "$cfg" broadcast 0
 363         config_get leasetime "$cfg" leasetime
 364
 365         [ "$broadcast" = "0" ] && broadcast= || broadcast=",set:needs-broadcast"
 366
 367         hosttag="${networkid:+,set:${networkid}}${tags:+,set:${tags}}$broadcast"
 368         nametime="${name:+,$name}${leasetime:+,$leasetime}"
 369
 370         if [ $DNSMASQ_DHCP_VER -eq 6 ]; then
 371                 addrs="${ip:+,$ip}${hostid:+,[::$hostid]}"
 372                 xappend "--dhcp-host=$macs${duids:+,$duids}$hosttag$addrs$nametime"
 373         else
 374                 xappend "--dhcp-host=$macs$hosttag${ip:+,$ip}$nametime"
 375         fi
 376 }
 377
 378 dhcp_this_host_add() {
 379         local net="$1"
 380         local ifname="$2"
 381         local mode="$3"
 382         local routerstub routername ifdashname
 383         local lanaddr lanaddr6 lanaddrs6 ulaprefix
 384
 385         if [ "$mode" -gt 0 ] ; then
 386                 ifdashname="${ifname//./-}"
 387                 routerstub="$( md5sum /etc/os-release )"
 388                 routerstub="router-${routerstub// */}"
 389                 routername="$( uci_get system @system[0] hostname $routerstub )"
 390
 391                 if [ "$mode" -gt 1 ] ; then
 392                         if [ "$mode" -gt 2 ] ; then
 393                                 if [ "$mode" -gt 3 ] ; then
 394                                         append_interface_name "$ifdashname.$routername.$DOMAIN" "$ifname"
 395                                 fi
 396
 397                                 append_interface_name "$routername.$DOMAIN" "$ifname"
 398                         fi
 399
 400                         # All IP addresses discovered by dnsmasq will be labeled (except fe80::)
 401                         append_interface_name "$routername" "$ifname"
 402
 403                 else
 404                         # This uses a static host file entry for only limited addresses.
 405                         # Use dnsmasq option "--expandhosts" to enable FQDN on host files.
 406                         ulaprefix="$(uci_get network @globals[0] ula_prefix)"
 407                         network_get_ipaddr lanaddr "$net"
 408                         network_get_ipaddrs6 lanaddrs6 "$net"
 409
 410                         if [ -n "$lanaddr" ] ; then
 411                                 dhcp_domain_add "" "$routername" "$lanaddr"
 412                         fi
 413
 414                         if [ -n "$ulaprefix" ] && [ -n "$lanaddrs6" ] ; then
 415                                 for lanaddr6 in $lanaddrs6 ; do
 416                                         case "$lanaddr6" in
 417                                         "${ulaprefix%%:/*}"*)
 418                                                 dhcp_domain_add "" "$routername" "$lanaddr6"
 419                                                 ;;
 420                                         esac
 421                                 done
 422                         fi
 423                 fi
 424         fi
 425 }
 426
 427 dhcp_tag_add() {
 428         # NOTE: dnsmasq has explicit "option6:" prefix for DHCPv6 so no collisions
 429         local cfg="$1"
 430
 431         tag="$cfg"
 432
 433         [ -n "$tag" ] || return 0
 434
 435         config_get_bool force "$cfg" force 0
 436         [ "$force" = "0" ] && force=
 437
 438         config_get option "$cfg" dhcp_option
 439         for o in $option; do
 440                 xappend "--dhcp-option${force:+-force}=tag:$tag,$o"
 441         done
 442 }
 443
 444 dhcp_mac_add() {
 445         local cfg="$1"
 446
 447         config_get networkid "$cfg" networkid
 448         [ -n "$networkid" ] || return 0
 449
 450         config_get mac "$cfg" mac
 451         [ -n "$mac" ] || return 0
 452
 453         xappend "--dhcp-mac=$networkid,$mac"
 454
 455         dhcp_option_add "$cfg" "$networkid"
 456 }
 457
 458 dhcp_boot_add() {
 459         # TODO: BOOTURL is different between DHCPv4 and DHCPv6
 460         local cfg="$1"
 461
 462         config_get networkid "$cfg" networkid
 463
 464         config_get filename "$cfg" filename
 465         [ -n "$filename" ] || return 0
 466
 467         config_get servername "$cfg" servername
 468         config_get serveraddress "$cfg" serveraddress
 469
 470         [ -n "$serveraddress" ] && [ ! -n "$servername" ] && return 0
 471
 472         xappend "--dhcp-boot=${networkid:+net:$networkid,}${filename}${servername:+,$servername}${serveraddress:+,$serveraddress}"
 473
 474         config_get_bool force "$cfg" force 0
 475
 476         dhcp_option_add "$cfg" "$networkid" "$force"
 477 }
 478
 479
 480 dhcp_add() {
 481         local cfg="$1"
 482         local dhcp6range="::"
 483         local nettag
 484         local tags
 485
 486         config_get net "$cfg" interface
 487         [ -n "$net" ] || return 0
 488
 489         config_get networkid "$cfg" networkid
 490         [ -n "$networkid" ] || networkid="$net"
 491
 492         network_get_device ifname "$net" || return 0
 493
 494         [ "$cachelocal" = "0" ] && network_get_dnsserver dnsserver "$net" && {
 495                 DNS_SERVERS="$DNS_SERVERS $dnsserver"
 496         }
 497
 498         append_bool "$cfg" ignore "--no-dhcp-interface=$ifname" && {
 499                 # Many ISP do not have useful names for DHCP customers (your WAN).
 500                 dhcp_this_host_add "$net" "$ifname" "$ADD_WAN_FQDN"
 501                 return 0
 502         }
 503
 504         network_get_subnet subnet "$net" || return 0
 505         network_get_protocol proto "$net" || return 0
 506
 507         # Do not support non-static interfaces for now
 508         [ static = "$proto" ] || return 0
 509
 510         # Override interface netmask with dhcp config if applicable
 511         config_get netmask "$cfg" netmask "${subnet##*/}"
 512
 513         #check for an already active dhcp server on the interface, unless 'force' is set
 514         config_get_bool force "$cfg" force 0
 515         [ $force -gt 0 ] || dhcp_check "$ifname" || {
 516                 logger -t dnsmasq \
 517                         "found already running DHCP-server on interface '$ifname'" \
 518                         "refusing to start, use 'option force 1' to override"
 519                 return 0
 520         }
 521
 522         config_get start "$cfg" start 100
 523         config_get limit "$cfg" limit 150
 524         config_get leasetime "$cfg" leasetime 12h
 525         config_get options "$cfg" options
 526         config_get_bool dynamicdhcp "$cfg" dynamicdhcp 1
 527
 528         config_get dhcpv4 "$cfg" dhcpv4
 529         config_get dhcpv6 "$cfg" dhcpv6
 530
 531         config_get ra "$cfg" ra
 532         config_get ra_management "$cfg" ra_management
 533         config_get ra_preference "$cfg" ra_preference
 534         config_get dns "$cfg" dns
 535
 536         config_list_foreach "$cfg" "interface_name" append_interface_name "$ifname"
 537
 538         # Put the router host name on this DHCP served interface address(es)
 539         dhcp_this_host_add "$net" "$ifname" "$ADD_LOCAL_FQDN"
 540
 541         start="$( dhcp_calc "$start" )"
 542
 543         add_tag() {
 544                 tags="${tags}tag:$1,"
 545         }
 546         config_list_foreach "$cfg" tag add_tag
 547
 548         nettag="${networkid:+set:${networkid},}"
 549
 550         if [ "$limit" -gt 0 ] ; then
 551                 limit=$((limit-1))
 552         fi
 553
 554         eval "$(ipcalc.sh "${subnet%%/*}" $netmask $start $limit)"
 555
 556         if [ "$dynamicdhcp" = "0" ] ; then
 557                 END="static"
 558                 dhcp6range="::,static"
 559         else
 560                 dhcp6range="::1000,::ffff"
 561         fi
 562
 563
 564         if [ "$dhcpv4" != "disabled" ] ; then
 565                 xappend "--dhcp-range=$tags$nettag$START,$END,$NETMASK,$leasetime${options:+ $options}"
 566         fi
 567
 568
 569         if [ $DNSMASQ_DHCP_VER -eq 6 ] && [ "$ra" = "server" ] ; then
 570                 # Note: dnsmasq cannot just be a DHCPv6 server (all-in-1)
 571                 # and let some other machine(s) send RA pointing to it.
 572
 573                 case $ra_preference in
 574                 *high*)
 575                         xappend "--ra-param=$ifname,high,0,7200"
 576                         ;;
 577                 *low*)
 578                         xappend "--ra-param=$ifname,low,0,7200"
 579                         ;;
 580                 *)
 581                         # Send UNSOLICITED RA at default interval and live for 2 hours.
 582                         # TODO: convert flexible lease time into route life time (only seconds).
 583                         xappend "--ra-param=$ifname,0,7200"
 584                         ;;
 585                 esac
 586
 587                 if [ "$dhcpv6" = "disabled" ] ; then
 588                         ra_management="3"
 589                 fi
 590
 591
 592                 case $ra_management in
 593                 0)
 594                         # SLACC with DCHP for extended options
 595                         xappend "--dhcp-range=$nettag::,constructor:$ifname,ra-stateless,ra-names"
 596                         ;;
 597                 2)
 598                         # DHCP address and RA only for management redirection
 599                         xappend "--dhcp-range=$nettag$dhcp6range,constructor:$ifname,$leasetime"
 600                         ;;
 601                 3)
 602                         # SLAAC only but dnsmasq attempts to link HOSTNAME, DHCPv4 MAC, and SLAAC
 603                         xappend "--dhcp-range=$nettag::,constructor:$ifname,ra-only,ra-names"
 604                         ;;
 605                 *)
 606                         # SLAAC and full DHCP
 607                         xappend "--dhcp-range=$nettag$dhcp6range,constructor:$ifname,slaac,ra-names,$leasetime"
 608                         ;;
 609                 esac
 610
 611                 if [ -n "$dns" ]; then
 612                         dnss=""
 613                         for d in $dns; do append dnss "[$d]" ","; done
 614                 else
 615                         dnss="[::]"
 616                 fi
 617
 618                 dhcp_option_append "option6:dns-server,$dnss" "$networkid"
 619         fi
 620
 621         dhcp_option_add "$cfg" "$networkid" 0
 622         dhcp_option_add "$cfg" "$networkid" 2
 623 }
 624
 625 dhcp_option_append() {
 626         local option="$1"
 627         local networkid="$2"
 628         local force="$3"
 629
 630         xappend "--dhcp-option${force:+-force}=${networkid:+$networkid,}$option"
 631 }
 632
 633 dhcp_option_add() {
 634         # NOTE: dnsmasq has explicit "option6:" prefix for DHCPv6 so no collisions
 635         local cfg="$1"
 636         local networkid="$2"
 637         local force="$3"
 638         local opt="dhcp_option"
 639
 640         [ "$force" = "0" ] && force=
 641         [ "$force" = "2" ] && opt="dhcp_option_force"
 642
 643         local list_len
 644         config_get list_len "$cfg" "${opt}_LENGTH"
 645
 646         if [ -n "$list_len" ]; then
 647                 config_list_foreach "$cfg" "$opt" dhcp_option_append "$networkid" "$force"
 648         else
 649                 config_get dhcp_option "$cfg" "$opt"
 650
 651                 [ -n "$dhcp_option" ] && echo "Warning: the 'option $opt' syntax is deprecated, use 'list $opt'" >&2
 652
 653                 local option
 654                 for option in $dhcp_option; do
 655                         dhcp_option_append "$option" "$networkid" "$force"
 656                 done
 657         fi
 658 }
 659
 660 dhcp_domain_add() {
 661         local cfg="$1"
 662         local ip name names record
 663
 664         config_get names "$cfg" name "$2"
 665         [ -n "$names" ] || return 0
 666
 667         config_get ip "$cfg" ip "$3"
 668         [ -n "$ip" ] || return 0
 669
 670         for name in $names; do
 671                 record="${record:+$record }$name"
 672         done
 673
 674         echo "$ip $record" >> $HOSTFILE_TMP
 675 }
 676
 677 dhcp_srv_add() {
 678         local cfg="$1"
 679
 680         config_get srv "$cfg" srv
 681         [ -n "$srv" ] || return 0
 682
 683         config_get target "$cfg" target
 684         [ -n "$target" ] || return 0
 685
 686         config_get port "$cfg" port
 687         [ -n "$port" ] || return 0
 688
 689         config_get class "$cfg" class
 690         config_get weight "$cfg" weight
 691
 692         local service="$srv,$target,$port${class:+,$class${weight:+,$weight}}"
 693
 694         xappend "--srv-host=$service"
 695 }
 696
 697 dhcp_mx_add() {
 698         local cfg="$1"
 699         local domain relay pref
 700
 701         config_get domain "$cfg" domain
 702         [ -n "$domain" ] || return 0
 703
 704         config_get relay "$cfg" relay
 705         [ -n "$relay" ] || return 0
 706
 707         config_get pref "$cfg" pref 0
 708
 709         local service="$domain,$relay,$pref"
 710
 711         xappend "--mx-host=$service"
 712 }
 713
 714 dhcp_cname_add() {
 715         local cfg="$1"
 716         local cname target
 717
 718         config_get cname "$cfg" cname
 719         [ -n "$cname" ] || return 0
 720
 721         config_get target "$cfg" target
 722         [ -n "$target" ] || return 0
 723
 724         xappend "--cname=${cname},${target}"
 725 }
 726
 727 dhcp_hostrecord_add() {
 728         local cfg="$1"
 729         local names addresses record val
 730
 731         config_get names "$cfg" name "$2"
 732         if [ -z "$names" ]; then
 733                 return 0
 734         fi
 735
 736         config_get addresses "$cfg" ip "$3"
 737         if [ -z "$addresses" ]; then
 738                 return 0
 739         fi
 740
 741         for val in $names $addresses; do
 742                 record="${record:+$record,}$val"
 743         done
 744
 745         xappend "--host-record=$record"
 746 }
 747
 748 dhcp_relay_add() {
 749         local cfg="$1"
 750         local local_addr server_addr interface
 751
 752         config_get local_addr "$cfg" local_addr
 753         [ -n "$local_addr" ] || return 0
 754
 755         config_get server_addr "$cfg" server_addr
 756         [ -n "$server_addr" ] || return 0
 757
 758         config_get interface "$cfg" interface
 759         if [ -z "$interface" ]; then
 760                 xappend "--dhcp-relay=$local_addr,$server_addr"
 761         else
 762                 network_get_device ifname "$interface" || return
 763                 xappend "--dhcp-relay=$local_addr,$server_addr,$ifname"
 764         fi
 765 }
 766
 767 dnsmasq_start()
 768 {
 769         local cfg="$1"
 770         local disabled user_dhcpscript
 771         local resolvfile resolvdir localuse=0
 772
 773         config_get_bool disabled "$cfg" disabled 0
 774         [ "$disabled" -gt 0 ] && return 0
 775
 776         # reset list of DOMAINS and DNS servers (for each dnsmasq instance)
 777         DNS_SERVERS=""
 778         DOMAIN=""
 779         CONFIGFILE="${BASECONFIGFILE}.${cfg}"
 780         CONFIGFILE_TMP="${CONFIGFILE}.$$"
 781         HOSTFILE="${BASEHOSTFILE}.${cfg}"
 782         HOSTFILE_TMP="${HOSTFILE}.$$"
 783         BASEDHCPSTAMPFILE_CFG="${BASEDHCPSTAMPFILE}.${cfg}"
 784
 785         # before we can call xappend
 786         mkdir -p /var/run/dnsmasq/
 787         mkdir -p $(dirname $CONFIGFILE)
 788         mkdir -p $(dirname $HOSTFILE)
 789         mkdir -p /var/lib/misc
 790         chown dnsmasq:dnsmasq /var/run/dnsmasq
 791
 792         echo "# auto-generated config file from /etc/config/dhcp" > $CONFIGFILE_TMP
 793         echo "# auto-generated config file from /etc/config/dhcp" > $HOSTFILE_TMP
 794
 795         local dnsmasqconffile="/etc/dnsmasq.${cfg}.conf"
 796         if [ ! -r "$dnsmasqconffile" ]; then
 797                 dnsmasqconffile=/etc/dnsmasq.conf
 798         fi
 799
 800         # if we did this last, we could override auto-generated config
 801         [ -f "${dnsmasqconffile}" ] && {
 802                 xappend "--conf-file=${dnsmasqconffile}"
 803         }
 804
 805         $PROG --version | grep -osqE "^Compile time options:.* DHCPv6( |$)" && DHCPv6CAPABLE=1 || DHCPv6CAPABLE=0
 806
 807
 808         if [ -x /usr/sbin/odhcpd ] && [ -x /etc/init.d/odhcpd ] ; then
 809                 local odhcpd_is_main odhcpd_is_enabled
 810                 config_get odhcpd_is_main odhcpd maindhcp 0
 811                 /etc/init.d/odhcpd enabled && odhcpd_is_enabled=1 || odhcpd_is_enabled=0
 812
 813
 814                 if [ "$odhcpd_is_enabled" -eq 0 ] && [ "$DHCPv6CAPABLE" -eq 1 ] ; then
 815                         # DHCP V4 and V6 in DNSMASQ
 816                         DNSMASQ_DHCP_VER=6
 817                 elif [ "$odhcpd_is_main" -gt 0 ] ; then
 818                         # ODHCPD is doing it all
 819                         DNSMASQ_DHCP_VER=0
 820                 else
 821                         # You have ODHCPD but use DNSMASQ for DHCPV4
 822                         DNSMASQ_DHCP_VER=4
 823                 fi
 824
 825         elif [ "$DHCPv6CAPABLE" -eq 1 ] ; then
 826                 # DHCP V4 and V6 in DNSMASQ
 827                 DNSMASQ_DHCP_VER=6
 828         else
 829                 DNSMASQ_DHCP_VER=4
 830         fi
 831
 832         # Allow DHCP/DHCPv6 to be handled by ISC DHCPD
 833         if [ -x /usr/sbin/dhcpd ] ; then
 834                 if [ -x /etc/init.d/dhcpd ] ; then
 835                         /etc/init.d/dhcpd enabled && DNSMASQ_DHCP_VER=0
 836                 fi
 837                 if [ -x /etc/init.d/dhcpd6 ] && [ "$DNSMASQ_DHCP_VER" -gt 0 ] ; then
 838                         /etc/init.d/dhcpd6 enabled && DNSMASQ_DHCP_VER=4
 839                 fi
 840         fi
 841
 842         append_bool "$cfg" authoritative "--dhcp-authoritative"
 843         append_bool "$cfg" nodaemon "--no-daemon"
 844         append_bool "$cfg" domainneeded "--domain-needed"
 845         append_bool "$cfg" filterwin2k "--filterwin2k"
 846         append_bool "$cfg" nohosts "--no-hosts"
 847         append_bool "$cfg" nonegcache "--no-negcache"
 848         append_bool "$cfg" strictorder "--strict-order"
 849         append_bool "$cfg" logqueries "--log-queries=extra"
 850         append_bool "$cfg" noresolv "--no-resolv"
 851         append_bool "$cfg" localise_queries "--localise-queries"
 852         append_bool "$cfg" readethers "--read-ethers"
 853         append_bool "$cfg" dbus "--enable-dbus"
 854         append_bool "$cfg" ubus "--enable-ubus" 1
 855         append_bool "$cfg" expandhosts "--expand-hosts"
 856         config_get tftp_root "$cfg" "tftp_root"
 857         [ -n "$tftp_root" ] && mkdir -p "$tftp_root" && append_bool "$cfg" enable_tftp "--enable-tftp"
 858         append_bool "$cfg" tftp_no_fail "--tftp-no-fail"
 859         append_bool "$cfg" nonwildcard "--bind-dynamic" 1
 860         append_bool "$cfg" fqdn "--dhcp-fqdn"
 861         append_bool "$cfg" proxydnssec "--proxy-dnssec"
 862         append_bool "$cfg" localservice "--local-service"
 863         append_bool "$cfg" logdhcp "--log-dhcp"
 864         append_bool "$cfg" quietdhcp "--quiet-dhcp"
 865         append_bool "$cfg" sequential_ip "--dhcp-sequential-ip"
 866         append_bool "$cfg" allservers "--all-servers"
 867         append_bool "$cfg" noping "--no-ping"
 868         append_bool "$cfg" rapidcommit "--dhcp-rapid-commit"
 869         append_bool "$cfg" scriptarp "--script-arp"
 870
 871         append_parm "$cfg" logfacility "--log-facility"
 872
 873         append_parm "$cfg" cachesize "--cache-size"
 874         append_parm "$cfg" dnsforwardmax "--dns-forward-max"
 875         append_parm "$cfg" port "--port"
 876         append_parm "$cfg" ednspacket_max "--edns-packet-max"
 877         append_parm "$cfg" dhcpleasemax "--dhcp-lease-max"
 878         append_parm "$cfg" "queryport" "--query-port"
 879         append_parm "$cfg" "minport" "--min-port"
 880         append_parm "$cfg" "maxport" "--max-port"
 881         append_parm "$cfg" "domain" "--domain"
 882         append_parm "$cfg" "local" "--server"
 883         config_list_foreach "$cfg" "listen_address" append_listenaddress
 884         config_list_foreach "$cfg" "server" append_server
 885         config_list_foreach "$cfg" "rev_server" append_rev_server
 886         config_list_foreach "$cfg" "address" append_address
 887         config_list_foreach "$cfg" "ipset" append_ipset
 888         [ -n "$BOOT" ] || {
 889                 config_list_foreach "$cfg" "interface" append_interface
 890                 config_list_foreach "$cfg" "notinterface" append_notinterface
 891         }
 892         config_list_foreach "$cfg" "addnhosts" append_addnhosts
 893         config_list_foreach "$cfg" "bogusnxdomain" append_bogusnxdomain
 894         append_parm "$cfg" "leasefile" "--dhcp-leasefile" "/tmp/dhcp.leases"
 895         append_parm "$cfg" "serversfile" "--servers-file"
 896         append_parm "$cfg" "tftp_root" "--tftp-root"
 897         append_parm "$cfg" "dhcp_boot" "--dhcp-boot"
 898         append_parm "$cfg" "local_ttl" "--local-ttl"
 899         append_parm "$cfg" "max_ttl" "--max-ttl"
 900         append_parm "$cfg" "min_cache_ttl" "--min-cache-ttl"
 901         append_parm "$cfg" "max_cache_ttl" "--max-cache-ttl"
 902         append_parm "$cfg" "pxe_prompt" "--pxe-prompt"
 903         config_list_foreach "$cfg" "pxe_service" append_pxe_service
 904         config_get DOMAIN "$cfg" domain
 905
 906         config_get_bool ADD_LOCAL_DOMAIN "$cfg" add_local_domain 1
 907         config_get_bool ADD_LOCAL_HOSTNAME "$cfg" add_local_hostname 1
 908         config_get ADD_LOCAL_FQDN "$cfg" add_local_fqdn ""
 909         config_get ADD_WAN_FQDN "$cfg" add_wan_fqdn 0
 910
 911         if [ -z "$ADD_LOCAL_FQDN" ] ; then
 912                 # maintain support for previous UCI
 913                 ADD_LOCAL_FQDN="$ADD_LOCAL_HOSTNAME"
 914         fi
 915
 916         config_get user_dhcpscript $cfg dhcpscript
 917         if has_handler || [ -n "$user_dhcpscript" ]; then
 918                 xappend "--dhcp-script=$DHCPSCRIPT"
 919                 xappend "--script-arp"
 920         fi
 921
 922         config_get leasefile $cfg leasefile "/tmp/dhcp.leases"
 923         [ -n "$leasefile" ] && [ ! -e "$leasefile" ] && touch "$leasefile"
 924         config_get_bool cachelocal "$cfg" cachelocal 1
 925
 926         config_get_bool noresolv "$cfg" noresolv 0
 927         if [ "$noresolv" != "1" ]; then
 928                 config_get resolvfile "$cfg" resolvfile /tmp/resolv.conf.d/resolv.conf.auto
 929                 [ -n "$resolvfile" ] && [ ! -e "$resolvfile" ] && touch "$resolvfile"
 930                 xappend "--resolv-file=$resolvfile"
 931                 [ "$resolvfile" = "/tmp/resolv.conf.d/resolv.conf.auto" ] && localuse=1
 932                 resolvdir="$(dirname "$resolvfile")"
 933         fi
 934         config_get_bool localuse "$cfg" localuse "$localuse"
 935
 936         config_get hostsfile "$cfg" dhcphostsfile
 937         [ -e "$hostsfile" ] && xappend "--dhcp-hostsfile=$hostsfile"
 938
 939         local rebind
 940         config_get_bool rebind "$cfg" rebind_protection 1
 941         [ $rebind -gt 0 ] && {
 942                 log_once \
 943                         "DNS rebinding protection is active," \
 944                         "will discard upstream RFC1918 responses!"
 945                 xappend "--stop-dns-rebind"
 946
 947                 local rebind_localhost
 948                 config_get_bool rebind_localhost "$cfg" rebind_localhost 0
 949                 [ $rebind_localhost -gt 0 ] && {
 950                         log_once "Allowing 127.0.0.0/8 responses"
 951                         xappend "--rebind-localhost-ok"
 952                 }
 953
 954                 append_rebind_domain() {
 955                         log_once "Allowing RFC1918 responses for domain $1"
 956                         xappend "--rebind-domain-ok=$1"
 957                 }
 958
 959                 config_list_foreach "$cfg" rebind_domain append_rebind_domain
 960         }
 961
 962         config_get_bool dnssec "$cfg" dnssec 0
 963         [ "$dnssec" -gt 0 ] && {
 964                 xappend "--conf-file=$TRUSTANCHORSFILE"
 965                 xappend "--dnssec"
 966                 [ -x /etc/init.d/sysntpd ] && {
 967                         if /etc/init.d/sysntpd enabled || [ "$(uci_get system.ntp.enabled)" = "1" ] ; then
 968                                 [ -f "$TIMEVALIDFILE" ] || xappend "--dnssec-no-timecheck"
 969                         fi
 970                 }
 971                 config_get_bool dnsseccheckunsigned "$cfg" dnsseccheckunsigned 1
 972                 [ "$dnsseccheckunsigned" -eq 0 ] && xappend "--dnssec-check-unsigned=no"
 973         }
 974
 975         config_get addmac "$cfg" addmac 0
 976         [ "$addmac" != "0" ] && {
 977                 [ "$addmac" = "1" ] && addmac=
 978                 xappend "--add-mac${addmac:+="$addmac"}"
 979         }
 980
 981         dhcp_option_add "$cfg" "" 0
 982         dhcp_option_add "$cfg" "" 2
 983
 984         xappend "--dhcp-broadcast=tag:needs-broadcast"
 985
 986         xappend "--addn-hosts=$(dirname $HOSTFILE)"
 987
 988         config_get dnsmasqconfdir "$cfg" confdir "/tmp/dnsmasq.d"
 989         xappend "--conf-dir=$dnsmasqconfdir"
 990         dnsmasqconfdir="${dnsmasqconfdir%%,*}"
 991         [ ! -d "$dnsmasqconfdir" ] && mkdir -p $dnsmasqconfdir
 992         xappend "--user=dnsmasq"
 993         xappend "--group=dnsmasq"
 994         echo >> $CONFIGFILE_TMP
 995
 996         config_get_bool enable_tftp "$cfg" enable_tftp 0
 997         [ "$enable_tftp" -gt 0 ] && {
 998                 config_get tftp_root "$cfg" tftp_root
 999                 append EXTRA_MOUNT $tftp_root
1000         }
1001
1002         config_foreach filter_dnsmasq host dhcp_host_add "$cfg"
1003         echo >> $CONFIGFILE_TMP
1004
1005         config_get_bool dhcpbogushostname "$cfg" dhcpbogushostname 1
1006         [ "$dhcpbogushostname" -gt 0 ] && {
1007                 xappend "--dhcp-ignore-names=tag:dhcp_bogus_hostname"
1008                 [ -r "$DHCPBOGUSHOSTNAMEFILE" ] && xappend "--conf-file=$DHCPBOGUSHOSTNAMEFILE"
1009         }
1010
1011         config_foreach filter_dnsmasq boot dhcp_boot_add "$cfg"
1012         config_foreach filter_dnsmasq mac dhcp_mac_add "$cfg"
1013         config_foreach filter_dnsmasq tag dhcp_tag_add "$cfg"
1014         config_foreach filter_dnsmasq vendorclass dhcp_vendorclass_add "$cfg"
1015         config_foreach filter_dnsmasq userclass dhcp_userclass_add "$cfg"
1016         config_foreach filter_dnsmasq circuitid dhcp_circuitid_add "$cfg"
1017         config_foreach filter_dnsmasq remoteid dhcp_remoteid_add "$cfg"
1018         config_foreach filter_dnsmasq subscrid dhcp_subscrid_add "$cfg"
1019         config_foreach filter_dnsmasq match dhcp_match_add "$cfg"
1020         config_foreach filter_dnsmasq domain dhcp_domain_add "$cfg"
1021         config_foreach filter_dnsmasq hostrecord dhcp_hostrecord_add "$cfg"
1022         [ -n "$BOOT" ] || config_foreach filter_dnsmasq relay dhcp_relay_add "$cfg"
1023
1024         echo >> $CONFIGFILE_TMP
1025         config_foreach filter_dnsmasq srvhost dhcp_srv_add "$cfg"
1026         config_foreach filter_dnsmasq mxhost dhcp_mx_add "$cfg"
1027         echo >> $CONFIGFILE_TMP
1028
1029         config_get_bool boguspriv "$cfg" boguspriv 1
1030         [ "$boguspriv" -gt 0 ] && {
1031                 xappend "--bogus-priv"
1032                 [ -r "$RFC6761FILE" ] && xappend "--conf-file=$RFC6761FILE"
1033         }
1034
1035         if [ "$DNSMASQ_DHCP_VER" -gt 4 ] ; then
1036                 # Enable RA feature for when/if it is constructed,
1037                 # and RA is selected per interface pool (RA, DHCP, or both),
1038                 # but no one (should) want RA broadcast in syslog
1039                 [ -n "$BOOT" ] || config_foreach filter_dnsmasq dhcp dhcp_add "$cfg"
1040                 xappend "--enable-ra"
1041                 xappend "--quiet-ra"
1042                 append_bool "$cfg" quietdhcp "--quiet-dhcp6"
1043
1044         elif [ "$DNSMASQ_DHCP_VER" -gt 0 ] ; then
1045                 [ -n "$BOOT" ] || config_foreach filter_dnsmasq dhcp dhcp_add "$cfg"
1046         fi
1047
1048
1049         echo >> $CONFIGFILE_TMP
1050         config_foreach filter_dnsmasq cname dhcp_cname_add "$cfg"
1051         echo >> $CONFIGFILE_TMP
1052
1053         echo >> $CONFIGFILE_TMP
1054         mv -f $CONFIGFILE_TMP $CONFIGFILE
1055         mv -f $HOSTFILE_TMP $HOSTFILE
1056
1057         [ "$localuse" -gt 0 ] && {
1058                 rm -f /tmp/resolv.conf
1059                 [ $ADD_LOCAL_DOMAIN -eq 1 ] && [ -n "$DOMAIN" ] && {
1060                         echo "search $DOMAIN" >> /tmp/resolv.conf
1061                 }
1062                 DNS_SERVERS="$DNS_SERVERS 127.0.0.1"
1063                 for DNS_SERVER in $DNS_SERVERS ; do
1064                         echo "nameserver $DNS_SERVER" >> /tmp/resolv.conf
1065                 done
1066         }
1067
1068         procd_open_instance $cfg
1069         procd_set_param command $PROG -C $CONFIGFILE -k -x /var/run/dnsmasq/dnsmasq."${cfg}".pid
1070         procd_set_param file $CONFIGFILE
1071         [ -n "$user_dhcpscript" ] && procd_set_param env USER_DHCPSCRIPT="$user_dhcpscript"
1072         procd_set_param respawn
1073
1074         procd_add_jail dnsmasq ubus log
1075         procd_add_jail_mount $CONFIGFILE $TRUSTANCHORSFILE $HOSTFILE $RFC6761FILE $DHCPBOGUSHOSTNAMEFILE /etc/passwd /etc/group /etc/TZ /dev/null /dev/urandom $dnsmasqconffile $dnsmasqconfdir $resolvdir $user_dhcpscript /etc/hosts /etc/ethers /sbin/hotplug-call $EXTRA_MOUNT $DHCPSCRIPT
1076         procd_add_jail_mount_rw /var/run/dnsmasq/ $leasefile
1077
1078         procd_close_instance
1079 }
1080
1081 dnsmasq_stop()
1082 {
1083         local cfg="$1"
1084         local noresolv resolvfile localuse=0
1085
1086         config_get_bool noresolv "$cfg" noresolv 0
1087         config_get resolvfile "$cfg" "resolvfile"
1088
1089         [ "$noresolv" = 0 ] && [ "$resolvfile" = "/tmp/resolv.conf.d/resolv.conf.auto" ] && localuse=1
1090         config_get_bool localuse "$cfg" localuse "$localuse"
1091         [ "$localuse" -gt 0 ] && ln -sf "/tmp/resolv.conf.d/resolv.conf.auto" /tmp/resolv.conf
1092
1093         rm -f ${BASEDHCPSTAMPFILE}.${cfg}.*.dhcp
1094 }
1095
1096 add_interface_trigger()
1097 {
1098         local interface ignore
1099
1100         config_get interface "$1" interface
1101         config_get_bool ignore "$1" ignore 0
1102
1103         [ -n "$interface" ] && [ $ignore -eq 0 ] && procd_add_interface_trigger "interface.*" "$interface" /etc/init.d/dnsmasq reload
1104 }
1105
1106 service_triggers()
1107 {
1108         procd_add_reload_trigger "dhcp" "system"
1109
1110         config_load dhcp
1111         config_foreach add_interface_trigger dhcp
1112         config_foreach add_interface_trigger relay
1113 }
1114
1115 boot()
1116 {
1117         BOOT=1
1118         start "$@"
1119 }
1120
1121 start_service() {
1122         local instance="$1"
1123         local instance_found=0
1124
1125         . /lib/functions/network.sh
1126
1127         config_cb() {
1128                 local type="$1"
1129                 local name="$2"
1130                 if [ "$type" = "dnsmasq" ]; then
1131                         if [ -n "$instance" ] && [ "$instance" = "$name" ]; then
1132                                 instance_found=1
1133                         fi
1134                 fi
1135         }
1136
1137         config_load dhcp
1138
1139         if [ -n "$instance" ]; then
1140                 [ "$instance_found" -gt 0 ] || return
1141                 dnsmasq_start "$instance"
1142         else
1143                 config_foreach dnsmasq_start dnsmasq
1144         fi
1145 }
1146
1147 reload_service() {
1148         rc_procd start_service "$@"
1149         procd_send_signal dnsmasq "$@"
1150 }
1151
1152 stop_service() {
1153         local instance="$1"
1154         local instance_found=0
1155
1156         config_cb() {
1157                 local type="$1"
1158                 local name="$2"
1159                 if [ "$type" = "dnsmasq" ]; then
1160                         if [ -n "$instance" ] && [ "$instance" = "$name" ]; then
1161                                 instance_found=1
1162                         fi
1163                 fi
1164         }
1165
1166         config_load dhcp
1167
1168         if [ -n "$instance" ]; then
1169                 [ "$instance_found" -gt 0 ] || return
1170                 dnsmasq_stop "$instance"
1171         else
1172                 config_foreach dnsmasq_stop dnsmasq
1173         fi
1174 }