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                         if [ -z "$dnsmasq_has_dnssec" ]; then
  48                                 echo "dnsmasq: \"$opt\" requested, but dnssec support is not available" >&2
  49                                 exit 1
  50                         fi
  51                         ;;
  52                 tftp-*)
  53                         [ -z "$dnsmasq_has_tftp" ] ;;
  54                 ipset)
  55                         [ -z "$dnsmasq_has_ipset" ] ;;
  56                 *)
  57                         return 1
  58         esac
  59 }
  60
  61 xappend() {
  62         local value="${1#--}"
  63         local opt="${value%%=*}"
  64
  65         if ! dnsmasq_ignore_opt "$opt"; then
  66                 echo "$value" >>$CONFIGFILE_TMP
  67         fi
  68 }
  69
  70 hex_to_hostid() {
  71         local var="$1"
  72         local hex="${2#0x}" # strip optional "0x" prefix
  73
  74         if [ -n "${hex//[0-9a-fA-F]/}" ]; then
  75                 # is invalid hex literal
  76                 return 1
  77         fi
  78
  79         # convert into host id
  80         export "$var=$(
  81                 printf "%0x:%0x" \
  82                 $(((0x$hex >> 16) % 65536)) \
  83                 $(( 0x$hex        % 65536))
  84                 )"
  85
  86         return 0
  87 }
  88
  89 dhcp_calc() {
  90         local ip="$1"
  91         local res=0
  92
  93         while [ -n "$ip" ]; do
  94                 part="${ip%%.*}"
  95                 res="$(($res * 256))"
  96                 res="$(($res + $part))"
  97                 [ "${ip%.*}" != "$ip" ] && ip="${ip#*.}" || ip=
  98         done
  99         echo "$res"
 100 }
 101
 102 dhcp_check() {
 103         local ifname="$1"
 104         local stamp="${BASEDHCPSTAMPFILE_CFG}.${ifname}.dhcp"
 105         local rv=0
 106
 107         [ -s "$stamp" ] && return $(cat "$stamp")
 108
 109         # If there's no carrier yet, skip this interface.
 110         # The init script will be called again once the link is up
 111         case "$(devstatus "$ifname" | jsonfilter -e @.carrier)" in
 112                 false) return 1;;
 113         esac
 114
 115         udhcpc -n -q -s /bin/true -t 1 -i "$ifname" >&- && rv=1 || rv=0
 116
 117         echo $rv > "$stamp"
 118         return $rv
 119 }
 120
 121 log_once() {
 122         pidof dnsmasq >/dev/null || \
 123                 logger -t dnsmasq "$@"
 124 }
 125
 126 has_handler() {
 127         local file
 128
 129         for file in /etc/hotplug.d/dhcp/* /etc/hotplug.d/tftp/* /etc/hotplug.d/neigh/*; do
 130                 [ -f "$file" ] && return 0
 131         done
 132
 133         return 1
 134 }
 135
 136 append_bool() {
 137         local section="$1"
 138         local option="$2"
 139         local value="$3"
 140         local default="$4"
 141         local _loctmp
 142         [ -z "$default" ] && default="0"
 143         config_get_bool _loctmp "$section" "$option" "$default"
 144         [ $_loctmp -gt 0 ] && xappend "$value"
 145 }
 146
 147 append_parm() {
 148         local section="$1"
 149         local option="$2"
 150         local switch="$3"
 151         local default="$4"
 152         local _loctmp
 153         config_get _loctmp "$section" "$option" "$default"
 154         [ -z "$_loctmp" ] && return 0
 155         xappend "$switch=$_loctmp"
 156 }
 157
 158 append_server() {
 159         xappend "--server=$1"
 160 }
 161
 162 append_rev_server() {
 163         xappend "--rev-server=$1"
 164 }
 165
 166 append_address() {
 167         xappend "--address=$1"
 168 }
 169
 170 append_ipset() {
 171         xappend "--ipset=$1"
 172 }
 173
 174 append_interface() {
 175         network_get_device ifname "$1" || ifname="$1"
 176         xappend "--interface=$ifname"
 177 }
 178
 179 append_listenaddress() {
 180         xappend "--listen-address=$1"
 181 }
 182
 183 append_notinterface() {
 184         network_get_device ifname "$1" || ifname="$1"
 185         xappend "--except-interface=$ifname"
 186 }
 187
 188 append_addnhosts() {
 189         xappend "--addn-hosts=$1"
 190 }
 191
 192 append_bogusnxdomain() {
 193         xappend "--bogus-nxdomain=$1"
 194 }
 195
 196 append_pxe_service() {
 197         xappend "--pxe-service=$1"
 198 }
 199
 200 append_interface_name() {
 201         xappend "--interface-name=$1,$2"
 202 }
 203
 204 filter_dnsmasq() {
 205         local cfg="$1" func="$2" match_cfg="$3" found_cfg
 206
 207         # use entry when no instance entry set, or if it matches
 208         config_get found_cfg "$cfg" "instance"
 209         if [ -z "$found_cfg" ] || [ "$found_cfg" = "$match_cfg" ]; then
 210                 $func $cfg
 211         fi
 212 }
 213
 214 dhcp_subscrid_add() {
 215         local cfg="$1"
 216
 217         config_get networkid "$cfg" networkid
 218         [ -n "$networkid" ] || return 0
 219
 220         config_get subscriberid "$cfg" subscriberid
 221         [ -n "$subscriberid" ] || return 0
 222
 223         xappend "--dhcp-subscrid=$networkid,$subscriberid"
 224
 225         config_get_bool force "$cfg" force 0
 226
 227         dhcp_option_add "$cfg" "$networkid" "$force"
 228 }
 229
 230 dhcp_remoteid_add() {
 231         local cfg="$1"
 232
 233         config_get networkid "$cfg" networkid
 234         [ -n "$networkid" ] || return 0
 235
 236         config_get remoteid "$cfg" remoteid
 237         [ -n "$remoteid" ] || return 0
 238
 239         xappend "--dhcp-remoteid=$networkid,$remoteid"
 240
 241         config_get_bool force "$cfg" force 0
 242
 243         dhcp_option_add "$cfg" "$networkid" "$force"
 244 }
 245
 246 dhcp_circuitid_add() {
 247         # TODO: DHCPV6 does not have circuitid; catch "option6:"
 248         local cfg="$1"
 249
 250         config_get networkid "$cfg" networkid
 251         [ -n "$networkid" ] || return 0
 252
 253         config_get circuitid "$cfg" circuitid
 254         [ -n "$circuitid" ] || return 0
 255
 256         xappend "--dhcp-circuitid=$networkid,$circuitid"
 257
 258         config_get_bool force "$cfg" force 0
 259
 260         dhcp_option_add "$cfg" "$networkid" "$force"
 261 }
 262
 263 dhcp_userclass_add() {
 264         local cfg="$1"
 265
 266         config_get networkid "$cfg" networkid
 267         [ -n "$networkid" ] || return 0
 268
 269         config_get userclass "$cfg" userclass
 270         [ -n "$userclass" ] || return 0
 271
 272         xappend "--dhcp-userclass=$networkid,$userclass"
 273
 274         config_get_bool force "$cfg" force 0
 275
 276         dhcp_option_add "$cfg" "$networkid" "$force"
 277 }
 278
 279 dhcp_vendorclass_add() {
 280         # TODO: DHCPV6 vendor class has stricter definitions; catch? fixup?
 281         local cfg="$1"
 282
 283         config_get networkid "$cfg" networkid
 284         [ -n "$networkid" ] || return 0
 285
 286         config_get vendorclass "$cfg" vendorclass
 287         [ -n "$vendorclass" ] || return 0
 288
 289         xappend "--dhcp-vendorclass=$networkid,$vendorclass"
 290
 291         config_get_bool force "$cfg" force 0
 292
 293         dhcp_option_add "$cfg" "$networkid" "$force"
 294 }
 295
 296 dhcp_match_add() {
 297         local cfg="$1"
 298
 299         config_get networkid "$cfg" networkid
 300         [ -n "$networkid" ] || return 0
 301
 302         config_get match "$cfg" match
 303         [ -n "$match" ] || return 0
 304
 305         xappend "--dhcp-match=$networkid,$match"
 306
 307         config_get_bool force "$cfg" force 0
 308
 309         dhcp_option_add "$cfg" "$networkid" "$force"
 310 }
 311
 312 dhcp_host_add() {
 313         local cfg="$1"
 314         local hosttag nametime addrs duids macs tags
 315
 316         config_get_bool force "$cfg" force 0
 317
 318         config_get networkid "$cfg" networkid
 319         [ -n "$networkid" ] && dhcp_option_add "$cfg" "$networkid" "$force"
 320
 321         config_get_bool enable "$cfg" enable 1
 322         [ "$enable" = "0" ] && return 0
 323
 324         config_get name "$cfg" name
 325         config_get ip "$cfg" ip
 326         config_get hostid "$cfg" hostid
 327
 328         [ -z "$ip" ] && [ -z "$name" ] && [ -z "$hostid" ] && return 0
 329
 330         config_get_bool dns "$cfg" dns 0
 331         [ "$dns" = "1" ] && [ -n "$ip" ] && [ -n "$name" ] && {
 332                 echo "$ip $name${DOMAIN:+.$DOMAIN}" >> $HOSTFILE_TMP
 333         }
 334
 335         config_get mac "$cfg" mac
 336         config_get duid "$cfg" duid
 337         config_get tag "$cfg" tag
 338
 339         if [ -n "$mac" ]; then
 340                 # --dhcp-host=00:20:e0:3b:13:af,192.168.0.199,lap
 341                 # many MAC are possible to track a laptop ON/OFF dock
 342                 for m in $mac; do append macs "$m" ","; done
 343         fi
 344
 345         if [ $DNSMASQ_DHCP_VER -eq 6 ] && [ -n "$duid" ]; then
 346                 # --dhcp-host=id:00:03:00:01:12:00:00:01:02:03,[::beef],lap
 347                 # one (virtual) machine gets one DUID per RFC3315
 348                 duids="id:${duid// */}"
 349         fi
 350
 351         if [ -z "$macs" ] && [ -z "$duids" ]; then
 352                 # --dhcp-host=lap,192.168.0.199,[::beef]
 353                 [ -n "$name" ] || return 0
 354                 macs="$name"
 355                 name=""
 356         fi
 357
 358         if [ -n "$hostid" ]; then
 359                 hex_to_hostid hostid "$hostid"
 360         fi
 361
 362         if [ -n "$tag" ]; then
 363                 for t in $tag; do append tags "$t" ",set:"; done
 364         fi
 365
 366         config_get_bool broadcast "$cfg" broadcast 0
 367         config_get leasetime "$cfg" leasetime
 368
 369         [ "$broadcast" = "0" ] && broadcast= || broadcast=",set:needs-broadcast"
 370
 371         hosttag="${networkid:+,set:${networkid}}${tags:+,set:${tags}}$broadcast"
 372         nametime="${name:+,$name}${leasetime:+,$leasetime}"
 373
 374         if [ $DNSMASQ_DHCP_VER -eq 6 ]; then
 375                 addrs="${ip:+,$ip}${hostid:+,[::$hostid]}"
 376                 xappend "--dhcp-host=$macs${duids:+,$duids}$hosttag$addrs$nametime"
 377         else
 378                 xappend "--dhcp-host=$macs$hosttag${ip:+,$ip}$nametime"
 379         fi
 380 }
 381
 382 dhcp_this_host_add() {
 383         local net="$1"
 384         local ifname="$2"
 385         local mode="$3"
 386         local routerstub routername ifdashname
 387         local lanaddr lanaddr6 lanaddrs6 ulaprefix
 388
 389         if [ "$mode" -gt 0 ] ; then
 390                 ifdashname="${ifname//./-}"
 391                 routerstub="$( md5sum /etc/os-release )"
 392                 routerstub="router-${routerstub// */}"
 393                 routername="$( uci_get system @system[0] hostname $routerstub )"
 394
 395                 if [ "$mode" -gt 1 ] ; then
 396                         if [ "$mode" -gt 2 ] ; then
 397                                 if [ "$mode" -gt 3 ] ; then
 398                                         append_interface_name "$ifdashname.$routername.$DOMAIN" "$ifname"
 399                                 fi
 400
 401                                 append_interface_name "$routername.$DOMAIN" "$ifname"
 402                         fi
 403
 404                         # All IP addresses discovered by dnsmasq will be labeled (except fe80::)
 405                         append_interface_name "$routername" "$ifname"
 406
 407                 else
 408                         # This uses a static host file entry for only limited addresses.
 409                         # Use dnsmasq option "--expandhosts" to enable FQDN on host files.
 410                         ulaprefix="$(uci_get network @globals[0] ula_prefix)"
 411                         network_get_ipaddr lanaddr "$net"
 412                         network_get_ipaddrs6 lanaddrs6 "$net"
 413
 414                         if [ -n "$lanaddr" ] ; then
 415                                 dhcp_domain_add "" "$routername" "$lanaddr"
 416                         fi
 417
 418                         if [ -n "$ulaprefix" ] && [ -n "$lanaddrs6" ] ; then
 419                                 for lanaddr6 in $lanaddrs6 ; do
 420                                         case "$lanaddr6" in
 421                                         "${ulaprefix%%:/*}"*)
 422                                                 dhcp_domain_add "" "$routername" "$lanaddr6"
 423                                                 ;;
 424                                         esac
 425                                 done
 426                         fi
 427                 fi
 428         fi
 429 }
 430
 431 dhcp_tag_add() {
 432         # NOTE: dnsmasq has explicit "option6:" prefix for DHCPv6 so no collisions
 433         local cfg="$1"
 434
 435         tag="$cfg"
 436
 437         [ -n "$tag" ] || return 0
 438
 439         config_get_bool force "$cfg" force 0
 440         [ "$force" = "0" ] && force=
 441
 442         config_get option "$cfg" dhcp_option
 443         for o in $option; do
 444                 xappend "--dhcp-option${force:+-force}=tag:$tag,$o"
 445         done
 446 }
 447
 448 dhcp_mac_add() {
 449         local cfg="$1"
 450
 451         config_get networkid "$cfg" networkid
 452         [ -n "$networkid" ] || return 0
 453
 454         config_get mac "$cfg" mac
 455         [ -n "$mac" ] || return 0
 456
 457         xappend "--dhcp-mac=$networkid,$mac"
 458
 459         dhcp_option_add "$cfg" "$networkid"
 460 }
 461
 462 dhcp_boot_add() {
 463         # TODO: BOOTURL is different between DHCPv4 and DHCPv6
 464         local cfg="$1"
 465
 466         config_get networkid "$cfg" networkid
 467
 468         config_get filename "$cfg" filename
 469         [ -n "$filename" ] || return 0
 470
 471         config_get servername "$cfg" servername
 472         config_get serveraddress "$cfg" serveraddress
 473
 474         [ -n "$serveraddress" ] && [ ! -n "$servername" ] && return 0
 475
 476         xappend "--dhcp-boot=${networkid:+net:$networkid,}${filename}${servername:+,$servername}${serveraddress:+,$serveraddress}"
 477
 478         config_get_bool force "$cfg" force 0
 479
 480         dhcp_option_add "$cfg" "$networkid" "$force"
 481 }
 482
 483
 484 dhcp_add() {
 485         local cfg="$1"
 486         local dhcp6range="::"
 487         local nettag
 488         local tags
 489
 490         config_get net "$cfg" interface
 491         [ -n "$net" ] || return 0
 492
 493         config_get networkid "$cfg" networkid
 494         [ -n "$networkid" ] || networkid="$net"
 495
 496         network_get_device ifname "$net" || return 0
 497
 498         [ "$cachelocal" = "0" ] && network_get_dnsserver dnsserver "$net" && {
 499                 DNS_SERVERS="$DNS_SERVERS $dnsserver"
 500         }
 501
 502         append_bool "$cfg" ignore "--no-dhcp-interface=$ifname" && {
 503                 # Many ISP do not have useful names for DHCP customers (your WAN).
 504                 dhcp_this_host_add "$net" "$ifname" "$ADD_WAN_FQDN"
 505                 return 0
 506         }
 507
 508         network_get_subnet subnet "$net" || return 0
 509         network_get_protocol proto "$net" || return 0
 510
 511         # Do not support non-static interfaces for now
 512         [ static = "$proto" ] || return 0
 513
 514         # Override interface netmask with dhcp config if applicable
 515         config_get netmask "$cfg" netmask "${subnet##*/}"
 516
 517         #check for an already active dhcp server on the interface, unless 'force' is set
 518         config_get_bool force "$cfg" force 0
 519         [ $force -gt 0 ] || dhcp_check "$ifname" || {
 520                 logger -t dnsmasq \
 521                         "found already running DHCP-server on interface '$ifname'" \
 522                         "refusing to start, use 'option force 1' to override"
 523                 return 0
 524         }
 525
 526         config_get start "$cfg" start 100
 527         config_get limit "$cfg" limit 150
 528         config_get leasetime "$cfg" leasetime 12h
 529         config_get options "$cfg" options
 530         config_get_bool dynamicdhcp "$cfg" dynamicdhcp 1
 531
 532         config_get dhcpv4 "$cfg" dhcpv4
 533         config_get dhcpv6 "$cfg" dhcpv6
 534
 535         config_get ra "$cfg" ra
 536         config_get ra_management "$cfg" ra_management
 537         config_get ra_preference "$cfg" ra_preference
 538         config_get dns "$cfg" dns
 539
 540         config_list_foreach "$cfg" "interface_name" append_interface_name "$ifname"
 541
 542         # Put the router host name on this DHCP served interface address(es)
 543         dhcp_this_host_add "$net" "$ifname" "$ADD_LOCAL_FQDN"
 544
 545         start="$( dhcp_calc "$start" )"
 546
 547         add_tag() {
 548                 tags="${tags}tag:$1,"
 549         }
 550         config_list_foreach "$cfg" tag add_tag
 551
 552         nettag="${networkid:+set:${networkid},}"
 553
 554         if [ "$limit" -gt 0 ] ; then
 555                 limit=$((limit-1))
 556         fi
 557
 558         eval "$(ipcalc.sh "${subnet%%/*}" $netmask $start $limit)"
 559
 560         if [ "$dynamicdhcp" = "0" ] ; then
 561                 END="static"
 562                 dhcp6range="::,static"
 563         else
 564                 dhcp6range="::1000,::ffff"
 565         fi
 566
 567
 568         if [ "$dhcpv4" != "disabled" ] ; then
 569                 xappend "--dhcp-range=$tags$nettag$START,$END,$NETMASK,$leasetime${options:+ $options}"
 570         fi
 571
 572
 573         if [ $DNSMASQ_DHCP_VER -eq 6 ] && [ "$ra" = "server" ] ; then
 574                 # Note: dnsmasq cannot just be a DHCPv6 server (all-in-1)
 575                 # and let some other machine(s) send RA pointing to it.
 576
 577                 case $ra_preference in
 578                 *high*)
 579                         xappend "--ra-param=$ifname,high,0,7200"
 580                         ;;
 581                 *low*)
 582                         xappend "--ra-param=$ifname,low,0,7200"
 583                         ;;
 584                 *)
 585                         # Send UNSOLICITED RA at default interval and live for 2 hours.
 586                         # TODO: convert flexible lease time into route life time (only seconds).
 587                         xappend "--ra-param=$ifname,0,7200"
 588                         ;;
 589                 esac
 590
 591                 if [ "$dhcpv6" = "disabled" ] ; then
 592                         ra_management="3"
 593                 fi
 594
 595
 596                 case $ra_management in
 597                 0)
 598                         # SLACC with DCHP for extended options
 599                         xappend "--dhcp-range=$nettag::,constructor:$ifname,ra-stateless,ra-names"
 600                         ;;
 601                 2)
 602                         # DHCP address and RA only for management redirection
 603                         xappend "--dhcp-range=$nettag$dhcp6range,constructor:$ifname,$leasetime"
 604                         ;;
 605                 3)
 606                         # SLAAC only but dnsmasq attempts to link HOSTNAME, DHCPv4 MAC, and SLAAC
 607                         xappend "--dhcp-range=$nettag::,constructor:$ifname,ra-only,ra-names"
 608                         ;;
 609                 *)
 610                         # SLAAC and full DHCP
 611                         xappend "--dhcp-range=$nettag$dhcp6range,constructor:$ifname,slaac,ra-names,$leasetime"
 612                         ;;
 613                 esac
 614
 615                 if [ -n "$dns" ]; then
 616                         dnss=""
 617                         for d in $dns; do append dnss "[$d]" ","; done
 618                 else
 619                         dnss="[::]"
 620                 fi
 621
 622                 dhcp_option_append "option6:dns-server,$dnss" "$networkid"
 623         fi
 624
 625         dhcp_option_add "$cfg" "$networkid" 0
 626         dhcp_option_add "$cfg" "$networkid" 2
 627 }
 628
 629 dhcp_option_append() {
 630         local option="$1"
 631         local networkid="$2"
 632         local force="$3"
 633
 634         xappend "--dhcp-option${force:+-force}=${networkid:+$networkid,}$option"
 635 }
 636
 637 dhcp_option_add() {
 638         # NOTE: dnsmasq has explicit "option6:" prefix for DHCPv6 so no collisions
 639         local cfg="$1"
 640         local networkid="$2"
 641         local force="$3"
 642         local opt="dhcp_option"
 643
 644         [ "$force" = "0" ] && force=
 645         [ "$force" = "2" ] && opt="dhcp_option_force"
 646
 647         local list_len
 648         config_get list_len "$cfg" "${opt}_LENGTH"
 649
 650         if [ -n "$list_len" ]; then
 651                 config_list_foreach "$cfg" "$opt" dhcp_option_append "$networkid" "$force"
 652         else
 653                 config_get dhcp_option "$cfg" "$opt"
 654
 655                 [ -n "$dhcp_option" ] && echo "Warning: the 'option $opt' syntax is deprecated, use 'list $opt'" >&2
 656
 657                 local option
 658                 for option in $dhcp_option; do
 659                         dhcp_option_append "$option" "$networkid" "$force"
 660                 done
 661         fi
 662 }
 663
 664 dhcp_domain_add() {
 665         local cfg="$1"
 666         local ip name names record
 667
 668         config_get names "$cfg" name "$2"
 669         [ -n "$names" ] || return 0
 670
 671         config_get ip "$cfg" ip "$3"
 672         [ -n "$ip" ] || return 0
 673
 674         for name in $names; do
 675                 record="${record:+$record }$name"
 676         done
 677
 678         echo "$ip $record" >> $HOSTFILE_TMP
 679 }
 680
 681 dhcp_srv_add() {
 682         local cfg="$1"
 683
 684         config_get srv "$cfg" srv
 685         [ -n "$srv" ] || return 0
 686
 687         config_get target "$cfg" target
 688         [ -n "$target" ] || return 0
 689
 690         config_get port "$cfg" port
 691         [ -n "$port" ] || return 0
 692
 693         config_get class "$cfg" class
 694         config_get weight "$cfg" weight
 695
 696         local service="$srv,$target,$port${class:+,$class${weight:+,$weight}}"
 697
 698         xappend "--srv-host=$service"
 699 }
 700
 701 dhcp_mx_add() {
 702         local cfg="$1"
 703         local domain relay pref
 704
 705         config_get domain "$cfg" domain
 706         [ -n "$domain" ] || return 0
 707
 708         config_get relay "$cfg" relay
 709         [ -n "$relay" ] || return 0
 710
 711         config_get pref "$cfg" pref 0
 712
 713         local service="$domain,$relay,$pref"
 714
 715         xappend "--mx-host=$service"
 716 }
 717
 718 dhcp_cname_add() {
 719         local cfg="$1"
 720         local cname target
 721
 722         config_get cname "$cfg" cname
 723         [ -n "$cname" ] || return 0
 724
 725         config_get target "$cfg" target
 726         [ -n "$target" ] || return 0
 727
 728         xappend "--cname=${cname},${target}"
 729 }
 730
 731 dhcp_hostrecord_add() {
 732         local cfg="$1"
 733         local names addresses record val
 734
 735         config_get names "$cfg" name "$2"
 736         if [ -z "$names" ]; then
 737                 return 0
 738         fi
 739
 740         config_get addresses "$cfg" ip "$3"
 741         if [ -z "$addresses" ]; then
 742                 return 0
 743         fi
 744
 745         for val in $names $addresses; do
 746                 record="${record:+$record,}$val"
 747         done
 748
 749         xappend "--host-record=$record"
 750 }
 751
 752 dhcp_relay_add() {
 753         local cfg="$1"
 754         local local_addr server_addr interface
 755
 756         config_get local_addr "$cfg" local_addr
 757         [ -n "$local_addr" ] || return 0
 758
 759         config_get server_addr "$cfg" server_addr
 760         [ -n "$server_addr" ] || return 0
 761
 762         config_get interface "$cfg" interface
 763         if [ -z "$interface" ]; then
 764                 xappend "--dhcp-relay=$local_addr,$server_addr"
 765         else
 766                 network_get_device ifname "$interface" || return
 767                 xappend "--dhcp-relay=$local_addr,$server_addr,$ifname"
 768         fi
 769 }
 770
 771 dnsmasq_start()
 772 {
 773         local cfg="$1"
 774         local disabled user_dhcpscript
 775         local resolvfile resolvdir localuse=0
 776
 777         config_get_bool disabled "$cfg" disabled 0
 778         [ "$disabled" -gt 0 ] && return 0
 779
 780         # reset list of DOMAINS and DNS servers (for each dnsmasq instance)
 781         DNS_SERVERS=""
 782         DOMAIN=""
 783         CONFIGFILE="${BASECONFIGFILE}.${cfg}"
 784         CONFIGFILE_TMP="${CONFIGFILE}.$$"
 785         HOSTFILE="${BASEHOSTFILE}.${cfg}"
 786         HOSTFILE_TMP="${HOSTFILE}.$$"
 787         BASEDHCPSTAMPFILE_CFG="${BASEDHCPSTAMPFILE}.${cfg}"
 788
 789         # before we can call xappend
 790         mkdir -p /var/run/dnsmasq/
 791         mkdir -p $(dirname $CONFIGFILE)
 792         mkdir -p $(dirname $HOSTFILE)
 793         mkdir -p /var/lib/misc
 794         chown dnsmasq:dnsmasq /var/run/dnsmasq
 795
 796         echo "# auto-generated config file from /etc/config/dhcp" > $CONFIGFILE_TMP
 797         echo "# auto-generated config file from /etc/config/dhcp" > $HOSTFILE_TMP
 798
 799         local dnsmasqconffile="/etc/dnsmasq.${cfg}.conf"
 800         if [ ! -r "$dnsmasqconffile" ]; then
 801                 dnsmasqconffile=/etc/dnsmasq.conf
 802         fi
 803
 804         # if we did this last, we could override auto-generated config
 805         [ -f "${dnsmasqconffile}" ] && {
 806                 xappend "--conf-file=${dnsmasqconffile}"
 807         }
 808
 809         $PROG --version | grep -osqE "^Compile time options:.* DHCPv6( |$)" && DHCPv6CAPABLE=1 || DHCPv6CAPABLE=0
 810
 811
 812         if [ -x /usr/sbin/odhcpd ] && [ -x /etc/init.d/odhcpd ] ; then
 813                 local odhcpd_is_main odhcpd_is_enabled
 814                 config_get odhcpd_is_main odhcpd maindhcp 0
 815                 /etc/init.d/odhcpd enabled && odhcpd_is_enabled=1 || odhcpd_is_enabled=0
 816
 817
 818                 if [ "$odhcpd_is_enabled" -eq 0 ] && [ "$DHCPv6CAPABLE" -eq 1 ] ; then
 819                         # DHCP V4 and V6 in DNSMASQ
 820                         DNSMASQ_DHCP_VER=6
 821                 elif [ "$odhcpd_is_main" -gt 0 ] ; then
 822                         # ODHCPD is doing it all
 823                         DNSMASQ_DHCP_VER=0
 824                 else
 825                         # You have ODHCPD but use DNSMASQ for DHCPV4
 826                         DNSMASQ_DHCP_VER=4
 827                 fi
 828
 829         elif [ "$DHCPv6CAPABLE" -eq 1 ] ; then
 830                 # DHCP V4 and V6 in DNSMASQ
 831                 DNSMASQ_DHCP_VER=6
 832         else
 833                 DNSMASQ_DHCP_VER=4
 834         fi
 835
 836         # Allow DHCP/DHCPv6 to be handled by ISC DHCPD
 837         if [ -x /usr/sbin/dhcpd ] ; then
 838                 if [ -x /etc/init.d/dhcpd ] ; then
 839                         /etc/init.d/dhcpd enabled && DNSMASQ_DHCP_VER=0
 840                 fi
 841                 if [ -x /etc/init.d/dhcpd6 ] && [ "$DNSMASQ_DHCP_VER" -gt 0 ] ; then
 842                         /etc/init.d/dhcpd6 enabled && DNSMASQ_DHCP_VER=4
 843                 fi
 844         fi
 845
 846         append_bool "$cfg" authoritative "--dhcp-authoritative"
 847         append_bool "$cfg" nodaemon "--no-daemon"
 848         append_bool "$cfg" domainneeded "--domain-needed"
 849         append_bool "$cfg" filterwin2k "--filterwin2k"
 850         append_bool "$cfg" nohosts "--no-hosts"
 851         append_bool "$cfg" nonegcache "--no-negcache"
 852         append_bool "$cfg" strictorder "--strict-order"
 853         append_bool "$cfg" logqueries "--log-queries=extra"
 854         append_bool "$cfg" noresolv "--no-resolv"
 855         append_bool "$cfg" localise_queries "--localise-queries"
 856         append_bool "$cfg" readethers "--read-ethers"
 857         append_bool "$cfg" dbus "--enable-dbus"
 858         append_bool "$cfg" ubus "--enable-ubus" 1
 859         append_bool "$cfg" expandhosts "--expand-hosts"
 860         config_get tftp_root "$cfg" "tftp_root"
 861         [ -n "$tftp_root" ] && mkdir -p "$tftp_root" && append_bool "$cfg" enable_tftp "--enable-tftp"
 862         append_bool "$cfg" tftp_no_fail "--tftp-no-fail"
 863         append_bool "$cfg" nonwildcard "--bind-dynamic" 1
 864         append_bool "$cfg" fqdn "--dhcp-fqdn"
 865         append_bool "$cfg" proxydnssec "--proxy-dnssec"
 866         append_bool "$cfg" localservice "--local-service"
 867         append_bool "$cfg" logdhcp "--log-dhcp"
 868         append_bool "$cfg" quietdhcp "--quiet-dhcp"
 869         append_bool "$cfg" sequential_ip "--dhcp-sequential-ip"
 870         append_bool "$cfg" allservers "--all-servers"
 871         append_bool "$cfg" noping "--no-ping"
 872         append_bool "$cfg" rapidcommit "--dhcp-rapid-commit"
 873         append_bool "$cfg" scriptarp "--script-arp"
 874
 875         append_parm "$cfg" logfacility "--log-facility"
 876
 877         append_parm "$cfg" cachesize "--cache-size"
 878         append_parm "$cfg" dnsforwardmax "--dns-forward-max"
 879         append_parm "$cfg" port "--port"
 880         append_parm "$cfg" ednspacket_max "--edns-packet-max"
 881         append_parm "$cfg" dhcpleasemax "--dhcp-lease-max"
 882         append_parm "$cfg" "queryport" "--query-port"
 883         append_parm "$cfg" "minport" "--min-port"
 884         append_parm "$cfg" "maxport" "--max-port"
 885         append_parm "$cfg" "domain" "--domain"
 886         append_parm "$cfg" "local" "--server"
 887         config_list_foreach "$cfg" "listen_address" append_listenaddress
 888         config_list_foreach "$cfg" "server" append_server
 889         config_list_foreach "$cfg" "rev_server" append_rev_server
 890         config_list_foreach "$cfg" "address" append_address
 891         config_list_foreach "$cfg" "ipset" append_ipset
 892         [ -n "$BOOT" ] || {
 893                 config_list_foreach "$cfg" "interface" append_interface
 894                 config_list_foreach "$cfg" "notinterface" append_notinterface
 895         }
 896         config_list_foreach "$cfg" "addnhosts" append_addnhosts
 897         config_list_foreach "$cfg" "bogusnxdomain" append_bogusnxdomain
 898         append_parm "$cfg" "leasefile" "--dhcp-leasefile" "/tmp/dhcp.leases"
 899         append_parm "$cfg" "serversfile" "--servers-file"
 900         append_parm "$cfg" "tftp_root" "--tftp-root"
 901         append_parm "$cfg" "dhcp_boot" "--dhcp-boot"
 902         append_parm "$cfg" "local_ttl" "--local-ttl"
 903         append_parm "$cfg" "max_ttl" "--max-ttl"
 904         append_parm "$cfg" "min_cache_ttl" "--min-cache-ttl"
 905         append_parm "$cfg" "max_cache_ttl" "--max-cache-ttl"
 906         append_parm "$cfg" "pxe_prompt" "--pxe-prompt"
 907         config_list_foreach "$cfg" "pxe_service" append_pxe_service
 908         config_get DOMAIN "$cfg" domain
 909
 910         config_get_bool ADD_LOCAL_DOMAIN "$cfg" add_local_domain 1
 911         config_get_bool ADD_LOCAL_HOSTNAME "$cfg" add_local_hostname 1
 912         config_get ADD_LOCAL_FQDN "$cfg" add_local_fqdn ""
 913         config_get ADD_WAN_FQDN "$cfg" add_wan_fqdn 0
 914
 915         if [ -z "$ADD_LOCAL_FQDN" ] ; then
 916                 # maintain support for previous UCI
 917                 ADD_LOCAL_FQDN="$ADD_LOCAL_HOSTNAME"
 918         fi
 919
 920         config_get user_dhcpscript $cfg dhcpscript
 921         if has_handler || [ -n "$user_dhcpscript" ]; then
 922                 xappend "--dhcp-script=$DHCPSCRIPT"
 923                 xappend "--script-arp"
 924         fi
 925
 926         config_get leasefile $cfg leasefile "/tmp/dhcp.leases"
 927         [ -n "$leasefile" ] && [ ! -e "$leasefile" ] && touch "$leasefile"
 928         config_get_bool cachelocal "$cfg" cachelocal 1
 929
 930         config_get_bool noresolv "$cfg" noresolv 0
 931         if [ "$noresolv" != "1" ]; then
 932                 config_get resolvfile "$cfg" resolvfile /tmp/resolv.conf.d/resolv.conf.auto
 933                 [ -n "$resolvfile" ] && [ ! -e "$resolvfile" ] && touch "$resolvfile"
 934                 xappend "--resolv-file=$resolvfile"
 935                 [ "$resolvfile" = "/tmp/resolv.conf.d/resolv.conf.auto" ] && localuse=1
 936                 resolvdir="$(dirname "$resolvfile")"
 937         fi
 938         config_get_bool localuse "$cfg" localuse "$localuse"
 939
 940         config_get hostsfile "$cfg" dhcphostsfile
 941         [ -e "$hostsfile" ] && xappend "--dhcp-hostsfile=$hostsfile"
 942
 943         local rebind
 944         config_get_bool rebind "$cfg" rebind_protection 1
 945         [ $rebind -gt 0 ] && {
 946                 log_once \
 947                         "DNS rebinding protection is active," \
 948                         "will discard upstream RFC1918 responses!"
 949                 xappend "--stop-dns-rebind"
 950
 951                 local rebind_localhost
 952                 config_get_bool rebind_localhost "$cfg" rebind_localhost 0
 953                 [ $rebind_localhost -gt 0 ] && {
 954                         log_once "Allowing 127.0.0.0/8 responses"
 955                         xappend "--rebind-localhost-ok"
 956                 }
 957
 958                 append_rebind_domain() {
 959                         log_once "Allowing RFC1918 responses for domain $1"
 960                         xappend "--rebind-domain-ok=$1"
 961                 }
 962
 963                 config_list_foreach "$cfg" rebind_domain append_rebind_domain
 964         }
 965
 966         config_get_bool dnssec "$cfg" dnssec 0
 967         [ "$dnssec" -gt 0 ] && {
 968                 xappend "--conf-file=$TRUSTANCHORSFILE"
 969                 xappend "--dnssec"
 970                 [ -x /etc/init.d/sysntpd ] && {
 971                         if /etc/init.d/sysntpd enabled || [ "$(uci_get system.ntp.enabled)" = "1" ] ; then
 972                                 [ -f "$TIMEVALIDFILE" ] || xappend "--dnssec-no-timecheck"
 973                         fi
 974                 }
 975                 config_get_bool dnsseccheckunsigned "$cfg" dnsseccheckunsigned 1
 976                 [ "$dnsseccheckunsigned" -eq 0 ] && xappend "--dnssec-check-unsigned=no"
 977         }
 978
 979         config_get addmac "$cfg" addmac 0
 980         [ "$addmac" != "0" ] && {
 981                 [ "$addmac" = "1" ] && addmac=
 982                 xappend "--add-mac${addmac:+="$addmac"}"
 983         }
 984
 985         dhcp_option_add "$cfg" "" 0
 986         dhcp_option_add "$cfg" "" 2
 987
 988         xappend "--dhcp-broadcast=tag:needs-broadcast"
 989
 990         xappend "--addn-hosts=$(dirname $HOSTFILE)"
 991
 992         config_get dnsmasqconfdir "$cfg" confdir "/tmp/dnsmasq.d"
 993         xappend "--conf-dir=$dnsmasqconfdir"
 994         dnsmasqconfdir="${dnsmasqconfdir%%,*}"
 995         [ ! -d "$dnsmasqconfdir" ] && mkdir -p $dnsmasqconfdir
 996         xappend "--user=dnsmasq"
 997         xappend "--group=dnsmasq"
 998         echo >> $CONFIGFILE_TMP
 999
1000         config_get_bool enable_tftp "$cfg" enable_tftp 0
1001         [ "$enable_tftp" -gt 0 ] && {
1002                 config_get tftp_root "$cfg" tftp_root
1003                 append EXTRA_MOUNT $tftp_root
1004         }
1005
1006         config_foreach filter_dnsmasq host dhcp_host_add "$cfg"
1007         echo >> $CONFIGFILE_TMP
1008
1009         config_get_bool dhcpbogushostname "$cfg" dhcpbogushostname 1
1010         [ "$dhcpbogushostname" -gt 0 ] && {
1011                 xappend "--dhcp-ignore-names=tag:dhcp_bogus_hostname"
1012                 [ -r "$DHCPBOGUSHOSTNAMEFILE" ] && xappend "--conf-file=$DHCPBOGUSHOSTNAMEFILE"
1013         }
1014
1015         config_foreach filter_dnsmasq boot dhcp_boot_add "$cfg"
1016         config_foreach filter_dnsmasq mac dhcp_mac_add "$cfg"
1017         config_foreach filter_dnsmasq tag dhcp_tag_add "$cfg"
1018         config_foreach filter_dnsmasq vendorclass dhcp_vendorclass_add "$cfg"
1019         config_foreach filter_dnsmasq userclass dhcp_userclass_add "$cfg"
1020         config_foreach filter_dnsmasq circuitid dhcp_circuitid_add "$cfg"
1021         config_foreach filter_dnsmasq remoteid dhcp_remoteid_add "$cfg"
1022         config_foreach filter_dnsmasq subscrid dhcp_subscrid_add "$cfg"
1023         config_foreach filter_dnsmasq match dhcp_match_add "$cfg"
1024         config_foreach filter_dnsmasq domain dhcp_domain_add "$cfg"
1025         config_foreach filter_dnsmasq hostrecord dhcp_hostrecord_add "$cfg"
1026         [ -n "$BOOT" ] || config_foreach filter_dnsmasq relay dhcp_relay_add "$cfg"
1027
1028         echo >> $CONFIGFILE_TMP
1029         config_foreach filter_dnsmasq srvhost dhcp_srv_add "$cfg"
1030         config_foreach filter_dnsmasq mxhost dhcp_mx_add "$cfg"
1031         echo >> $CONFIGFILE_TMP
1032
1033         config_get_bool boguspriv "$cfg" boguspriv 1
1034         [ "$boguspriv" -gt 0 ] && {
1035                 xappend "--bogus-priv"
1036                 [ -r "$RFC6761FILE" ] && xappend "--conf-file=$RFC6761FILE"
1037         }
1038
1039         if [ "$DNSMASQ_DHCP_VER" -gt 4 ] ; then
1040                 # Enable RA feature for when/if it is constructed,
1041                 # and RA is selected per interface pool (RA, DHCP, or both),
1042                 # but no one (should) want RA broadcast in syslog
1043                 [ -n "$BOOT" ] || config_foreach filter_dnsmasq dhcp dhcp_add "$cfg"
1044                 xappend "--enable-ra"
1045                 xappend "--quiet-ra"
1046                 append_bool "$cfg" quietdhcp "--quiet-dhcp6"
1047
1048         elif [ "$DNSMASQ_DHCP_VER" -gt 0 ] ; then
1049                 [ -n "$BOOT" ] || config_foreach filter_dnsmasq dhcp dhcp_add "$cfg"
1050         fi
1051
1052
1053         echo >> $CONFIGFILE_TMP
1054         config_foreach filter_dnsmasq cname dhcp_cname_add "$cfg"
1055         echo >> $CONFIGFILE_TMP
1056
1057         echo >> $CONFIGFILE_TMP
1058         mv -f $CONFIGFILE_TMP $CONFIGFILE
1059         mv -f $HOSTFILE_TMP $HOSTFILE
1060
1061         [ "$localuse" -gt 0 ] && {
1062                 rm -f /tmp/resolv.conf
1063                 [ $ADD_LOCAL_DOMAIN -eq 1 ] && [ -n "$DOMAIN" ] && {
1064                         echo "search $DOMAIN" >> /tmp/resolv.conf
1065                 }
1066                 DNS_SERVERS="$DNS_SERVERS 127.0.0.1"
1067                 for DNS_SERVER in $DNS_SERVERS ; do
1068                         echo "nameserver $DNS_SERVER" >> /tmp/resolv.conf
1069                 done
1070         }
1071
1072         procd_open_instance $cfg
1073         procd_set_param command $PROG -C $CONFIGFILE -k -x /var/run/dnsmasq/dnsmasq."${cfg}".pid
1074         procd_set_param file $CONFIGFILE
1075         [ -n "$user_dhcpscript" ] && procd_set_param env USER_DHCPSCRIPT="$user_dhcpscript"
1076         procd_set_param respawn
1077
1078         procd_add_jail dnsmasq ubus log
1079         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
1080         procd_add_jail_mount_rw /var/run/dnsmasq/ $leasefile
1081
1082         procd_close_instance
1083 }
1084
1085 dnsmasq_stop()
1086 {
1087         local cfg="$1"
1088         local noresolv resolvfile localuse=0
1089
1090         config_get_bool noresolv "$cfg" noresolv 0
1091         config_get resolvfile "$cfg" "resolvfile"
1092
1093         [ "$noresolv" = 0 ] && [ "$resolvfile" = "/tmp/resolv.conf.d/resolv.conf.auto" ] && localuse=1
1094         config_get_bool localuse "$cfg" localuse "$localuse"
1095         [ "$localuse" -gt 0 ] && ln -sf "/tmp/resolv.conf.d/resolv.conf.auto" /tmp/resolv.conf
1096
1097         rm -f ${BASEDHCPSTAMPFILE}.${cfg}.*.dhcp
1098 }
1099
1100 add_interface_trigger()
1101 {
1102         local interface ignore
1103
1104         config_get interface "$1" interface
1105         config_get_bool ignore "$1" ignore 0
1106
1107         [ -n "$interface" ] && [ $ignore -eq 0 ] && procd_add_interface_trigger "interface.*" "$interface" /etc/init.d/dnsmasq reload
1108 }
1109
1110 service_triggers()
1111 {
1112         procd_add_reload_trigger "dhcp" "system"
1113
1114         config_load dhcp
1115         config_foreach add_interface_trigger dhcp
1116         config_foreach add_interface_trigger relay
1117 }
1118
1119 boot()
1120 {
1121         BOOT=1
1122         start "$@"
1123 }
1124
1125 start_service() {
1126         local instance="$1"
1127         local instance_found=0
1128
1129         . /lib/functions/network.sh
1130
1131         config_cb() {
1132                 local type="$1"
1133                 local name="$2"
1134                 if [ "$type" = "dnsmasq" ]; then
1135                         if [ -n "$instance" ] && [ "$instance" = "$name" ]; then
1136                                 instance_found=1
1137                         fi
1138                 fi
1139         }
1140
1141         config_load dhcp
1142
1143         if [ -n "$instance" ]; then
1144                 [ "$instance_found" -gt 0 ] || return
1145                 dnsmasq_start "$instance"
1146         else
1147                 config_foreach dnsmasq_start dnsmasq
1148         fi
1149 }
1150
1151 reload_service() {
1152         rc_procd start_service "$@"
1153         procd_send_signal dnsmasq "$@"
1154 }
1155
1156 stop_service() {
1157         local instance="$1"
1158         local instance_found=0
1159
1160         config_cb() {
1161                 local type="$1"
1162                 local name="$2"
1163                 if [ "$type" = "dnsmasq" ]; then
1164                         if [ -n "$instance" ] && [ "$instance" = "$name" ]; then
1165                                 instance_found=1
1166                         fi
1167                 fi
1168         }
1169
1170         config_load dhcp
1171
1172         if [ -n "$instance" ]; then
1173                 [ "$instance_found" -gt 0 ] || return
1174                 dnsmasq_stop "$instance"
1175         else
1176                 config_foreach dnsmasq_stop dnsmasq
1177         fi
1178 }