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 DHCPSCRIPT_DEPENDS="/usr/share/libubox/jshn.sh /usr/bin/jshn /bin/ubus"
  23
  24 DNSMASQ_DHCP_VER=4
  25
  26 dnsmasq_ignore_opt() {
  27         local opt="$1"
  28
  29         if [ -z "$dnsmasq_features" ]; then
  30                 dnsmasq_features="$(dnsmasq --version | grep -m1 'Compile time options:' | cut -d: -f2) "
  31                 [ "${dnsmasq_features#* DHCP }" = "$dnsmasq_features" ] || dnsmasq_has_dhcp=1
  32                 [ "${dnsmasq_features#* DHCPv6 }" = "$dnsmasq_features" ] || dnsmasq_has_dhcp6=1
  33                 [ "${dnsmasq_features#* DNSSEC }" = "$dnsmasq_features" ] || dnsmasq_has_dnssec=1
  34                 [ "${dnsmasq_features#* TFTP }" = "$dnsmasq_features" ] || dnsmasq_has_tftp=1
  35                 [ "${dnsmasq_features#* ipset }" = "$dnsmasq_features" ] || dnsmasq_has_ipset=1
  36                 [ "${dnsmasq_features#* nftset }" = "$dnsmasq_features" ] || dnsmasq_has_nftset=1
  37         fi
  38
  39         case "$opt" in
  40                 dhcp-duid|\
  41                 ra-param)
  42                         [ -z "$dnsmasq_has_dhcp6" ] ;;
  43                 dhcp-*|\
  44                 bootp-*|\
  45                 pxe-*)
  46                         [ -z "$dnsmasq_has_dhcp" ] ;;
  47                 dnssec*|\
  48                 trust-anchor)
  49                         if [ -z "$dnsmasq_has_dnssec" ]; then
  50                                 echo "dnsmasq: \"$opt\" requested, but dnssec support is not available" >&2
  51                                 exit 1
  52                         fi
  53                         return 1
  54                         ;;
  55                 tftp-*)
  56                         [ -z "$dnsmasq_has_tftp" ] ;;
  57                 ipset)
  58                         [ -z "$dnsmasq_has_ipset" ] ;;
  59                 nftset)
  60                         [ -z "$dnsmasq_has_nftset" ] ;;
  61                 *)
  62                         return 1
  63         esac
  64 }
  65
  66 xappend() {
  67         local value="${1#--}"
  68         local opt="${value%%=*}"
  69
  70         if ! dnsmasq_ignore_opt "$opt"; then
  71                 echo "$value" >>$CONFIGFILE_TMP
  72         fi
  73 }
  74
  75 hex_to_hostid() {
  76         local var="$1"
  77         local hex="${2#0x}" # strip optional "0x" prefix
  78
  79         if [ -n "${hex//[0-9a-fA-F]/}" ]; then
  80                 # is invalid hex literal
  81                 return 1
  82         fi
  83
  84         # convert into host id
  85         export "$var=$(
  86                 printf "%0x:%0x" \
  87                 $(((0x$hex >> 16) % 65536)) \
  88                 $(( 0x$hex        % 65536))
  89                 )"
  90
  91         return 0
  92 }
  93
  94 dhcp_calc() {
  95         local ip="$1"
  96         local res=0
  97
  98         while [ -n "$ip" ]; do
  99                 part="${ip%%.*}"
 100                 res="$(($res * 256))"
 101                 res="$(($res + $part))"
 102                 [ "${ip%.*}" != "$ip" ] && ip="${ip#*.}" || ip=
 103         done
 104         echo "$res"
 105 }
 106
 107 dhcp_check() {
 108         local ifname="$1"
 109         local stamp="${BASEDHCPSTAMPFILE_CFG}.${ifname}.dhcp"
 110         local rv=0
 111
 112         [ -s "$stamp" ] && return $(cat "$stamp")
 113
 114         # If interface is down, skip it.
 115         # The init script will be called again once the link is up
 116         case "$(devstatus "$ifname" | jsonfilter -e @.up)" in
 117                 false) return 1;;
 118         esac
 119
 120         udhcpc -n -q -s /bin/true -t 1 -i "$ifname" >&- && rv=1 || rv=0
 121
 122         echo $rv > "$stamp"
 123         return $rv
 124 }
 125
 126 log_once() {
 127         pidof dnsmasq >/dev/null || \
 128                 logger -t dnsmasq "$@"
 129 }
 130
 131 has_handler() {
 132         local file
 133
 134         for file in /etc/hotplug.d/dhcp/* /etc/hotplug.d/tftp/* /etc/hotplug.d/neigh/*; do
 135                 [ -f "$file" ] && return 0
 136         done
 137
 138         return 1
 139 }
 140
 141 append_bool() {
 142         local section="$1"
 143         local option="$2"
 144         local value="$3"
 145         local default="$4"
 146         local _loctmp
 147         [ -z "$default" ] && default="0"
 148         config_get_bool _loctmp "$section" "$option" "$default"
 149         [ $_loctmp -gt 0 ] && xappend "$value"
 150 }
 151
 152 append_parm() {
 153         local section="$1"
 154         local option="$2"
 155         local switch="$3"
 156         local default="$4"
 157         local _loctmp
 158         config_get _loctmp "$section" "$option" "$default"
 159         [ -z "$_loctmp" ] && return 0
 160         xappend "$switch=$_loctmp"
 161 }
 162
 163 append_server() {
 164         xappend "--server=$1"
 165 }
 166
 167 append_rev_server() {
 168         xappend "--rev-server=$1"
 169 }
 170
 171 append_address() {
 172         xappend "--address=$1"
 173 }
 174
 175 append_connmark_allowlist() {
 176         xappend "--connmark-allowlist=$1"
 177 }
 178
 179 append_interface() {
 180         network_get_device ifname "$1" || ifname="$1"
 181         xappend "--interface=$ifname"
 182 }
 183
 184 append_listenaddress() {
 185         xappend "--listen-address=$1"
 186 }
 187
 188 append_notinterface() {
 189         network_get_device ifname "$1" || ifname="$1"
 190         xappend "--except-interface=$ifname"
 191 }
 192
 193 ismounted() {
 194         local filename="$1"
 195         local dirname
 196         for dirname in $EXTRA_MOUNT ; do
 197                 case "$filename" in
 198                         "${dirname}/"* | "${dirname}" )
 199                                 return 0
 200                                 ;;
 201                 esac
 202         done
 203
 204         return 1
 205 }
 206
 207 append_extramount() {
 208         ismounted "$1" || append EXTRA_MOUNT "$1"
 209 }
 210
 211 append_addnhosts() {
 212         append_extramount "$1"
 213         xappend "--addn-hosts=$1"
 214 }
 215
 216 append_bogusnxdomain() {
 217         xappend "--bogus-nxdomain=$1"
 218 }
 219
 220 append_pxe_service() {
 221         xappend "--pxe-service=$1"
 222 }
 223
 224 append_interface_name() {
 225         xappend "--interface-name=$1,$2"
 226 }
 227
 228 filter_dnsmasq() {
 229         local cfg="$1" func="$2" match_cfg="$3" found_cfg
 230
 231         # use entry when no instance entry set, or if it matches
 232         config_get found_cfg "$cfg" "instance"
 233         if [ -z "$found_cfg" ] || [ "$found_cfg" = "$match_cfg" ]; then
 234                 $func $cfg
 235         fi
 236 }
 237
 238 dhcp_subscrid_add() {
 239         local cfg="$1"
 240
 241         config_get networkid "$cfg" networkid
 242         [ -n "$networkid" ] || return 0
 243
 244         config_get subscriberid "$cfg" subscriberid
 245         [ -n "$subscriberid" ] || return 0
 246
 247         xappend "--dhcp-subscrid=set:$networkid,$subscriberid"
 248
 249         config_get_bool force "$cfg" force 0
 250
 251         dhcp_option_add "$cfg" "$networkid" "$force"
 252 }
 253
 254 dhcp_remoteid_add() {
 255         local cfg="$1"
 256
 257         config_get networkid "$cfg" networkid
 258         [ -n "$networkid" ] || return 0
 259
 260         config_get remoteid "$cfg" remoteid
 261         [ -n "$remoteid" ] || return 0
 262
 263         xappend "--dhcp-remoteid=set:$networkid,$remoteid"
 264
 265         config_get_bool force "$cfg" force 0
 266
 267         dhcp_option_add "$cfg" "$networkid" "$force"
 268 }
 269
 270 dhcp_circuitid_add() {
 271         # TODO: DHCPV6 does not have circuitid; catch "option6:"
 272         local cfg="$1"
 273
 274         config_get networkid "$cfg" networkid
 275         [ -n "$networkid" ] || return 0
 276
 277         config_get circuitid "$cfg" circuitid
 278         [ -n "$circuitid" ] || return 0
 279
 280         xappend "--dhcp-circuitid=set:$networkid,$circuitid"
 281
 282         config_get_bool force "$cfg" force 0
 283
 284         dhcp_option_add "$cfg" "$networkid" "$force"
 285 }
 286
 287 dhcp_userclass_add() {
 288         local cfg="$1"
 289
 290         config_get networkid "$cfg" networkid
 291         [ -n "$networkid" ] || return 0
 292
 293         config_get userclass "$cfg" userclass
 294         [ -n "$userclass" ] || return 0
 295
 296         xappend "--dhcp-userclass=set:$networkid,$userclass"
 297
 298         config_get_bool force "$cfg" force 0
 299
 300         dhcp_option_add "$cfg" "$networkid" "$force"
 301 }
 302
 303 dhcp_vendorclass_add() {
 304         # TODO: DHCPV6 vendor class has stricter definitions; catch? fixup?
 305         local cfg="$1"
 306
 307         config_get networkid "$cfg" networkid
 308         [ -n "$networkid" ] || return 0
 309
 310         config_get vendorclass "$cfg" vendorclass
 311         [ -n "$vendorclass" ] || return 0
 312
 313         xappend "--dhcp-vendorclass=set:$networkid,$vendorclass"
 314
 315         config_get_bool force "$cfg" force 0
 316
 317         dhcp_option_add "$cfg" "$networkid" "$force"
 318 }
 319
 320 dhcp_match_add() {
 321         local cfg="$1"
 322
 323         config_get networkid "$cfg" networkid
 324         [ -n "$networkid" ] || return 0
 325
 326         config_get match "$cfg" match
 327         [ -n "$match" ] || return 0
 328
 329         xappend "--dhcp-match=set:$networkid,$match"
 330
 331         config_get_bool force "$cfg" force 0
 332
 333         dhcp_option_add "$cfg" "$networkid" "$force"
 334 }
 335
 336 dhcp_host_add() {
 337         local cfg="$1"
 338         local hosttag nametime addrs duids macs tags mtags
 339
 340         config_get_bool force "$cfg" force 0
 341
 342         config_get networkid "$cfg" networkid
 343         [ -n "$networkid" ] && dhcp_option_add "$cfg" "$networkid" "$force"
 344
 345         config_get_bool enable "$cfg" enable 1
 346         [ "$enable" = "0" ] && return 0
 347
 348         config_get name "$cfg" name
 349         config_get ip "$cfg" ip
 350         config_get hostid "$cfg" hostid
 351
 352         [ -z "$ip" ] && [ -z "$name" ] && [ -z "$hostid" ] && return 0
 353
 354         config_get_bool dns "$cfg" dns 0
 355         [ "$dns" = "1" ] && [ -n "$ip" ] && [ -n "$name" ] && {
 356                 echo "$ip $name${DOMAIN:+.$DOMAIN}" >> $HOSTFILE_TMP
 357         }
 358
 359         config_get mac "$cfg" mac
 360         config_get duid "$cfg" duid
 361         config_get tag "$cfg" tag
 362
 363         add_tag() {
 364                 mtags="${mtags}tag:$1,"
 365         }
 366         config_list_foreach "$cfg" match_tag add_tag
 367
 368         if [ -n "$mac" ]; then
 369                 # --dhcp-host=00:20:e0:3b:13:af,192.168.0.199,lap
 370                 # many MAC are possible to track a laptop ON/OFF dock
 371                 for m in $mac; do append macs "$m" ","; done
 372         fi
 373
 374         if [ $DNSMASQ_DHCP_VER -eq 6 ] && [ -n "$duid" ]; then
 375                 # --dhcp-host=id:00:03:00:01:12:00:00:01:02:03,[::beef],lap
 376                 # one (virtual) machine gets one DUID per RFC3315
 377                 duids="id:${duid// */}"
 378         fi
 379
 380         if [ -z "$macs" ] && [ -z "$duids" ]; then
 381                 # --dhcp-host=lap,192.168.0.199,[::beef]
 382                 [ -n "$name" ] || return 0
 383                 macs="$name"
 384                 name=""
 385         fi
 386
 387         if [ -n "$hostid" ]; then
 388                 hex_to_hostid hostid "$hostid"
 389         fi
 390
 391         if [ -n "$tag" ]; then
 392                 for t in $tag; do append tags "$t" ",set:"; done
 393         fi
 394
 395         config_get_bool broadcast "$cfg" broadcast 0
 396         config_get leasetime "$cfg" leasetime
 397
 398         [ "$broadcast" = "0" ] && broadcast= || broadcast=",set:needs-broadcast"
 399
 400         hosttag="${networkid:+,set:${networkid}}${tags:+,set:${tags}}$broadcast"
 401         nametime="${name:+,$name}${leasetime:+,$leasetime}"
 402
 403         if [ $DNSMASQ_DHCP_VER -eq 6 ]; then
 404                 addrs="${ip:+,$ip}${hostid:+,[::$hostid]}"
 405                 xappend "--dhcp-host=$mtags$macs${duids:+,$duids}$hosttag$addrs$nametime"
 406         else
 407                 xappend "--dhcp-host=$mtags$macs$hosttag${ip:+,$ip}$nametime"
 408         fi
 409 }
 410
 411 dhcp_this_host_add() {
 412         local net="$1"
 413         local ifname="$2"
 414         local mode="$3"
 415         local routerstub routername ifdashname
 416         local lanaddr lanaddr6 lanaddrs6 ulaprefix
 417
 418         if [ "$mode" -gt 0 ] ; then
 419                 ifdashname="${ifname//./-}"
 420                 routerstub="$( md5sum /etc/os-release )"
 421                 routerstub="router-${routerstub// */}"
 422                 routername="$( uci_get system @system[0] hostname $routerstub )"
 423
 424                 if [ "$mode" -gt 1 ] ; then
 425                         if [ "$mode" -gt 2 ] ; then
 426                                 if [ "$mode" -gt 3 ] ; then
 427                                         append_interface_name "$ifdashname.$routername.$DOMAIN" "$ifname"
 428                                 fi
 429
 430                                 append_interface_name "$routername.$DOMAIN" "$ifname"
 431                         fi
 432
 433                         # All IP addresses discovered by dnsmasq will be labeled (except fe80::)
 434                         append_interface_name "$routername" "$ifname"
 435
 436                 else
 437                         # This uses a static host file entry for only limited addresses.
 438                         # Use dnsmasq option "--expandhosts" to enable FQDN on host files.
 439                         ulaprefix="$(uci_get network @globals[0] ula_prefix)"
 440                         network_get_ipaddr lanaddr "$net"
 441                         network_get_ipaddrs6 lanaddrs6 "$net"
 442
 443                         if [ -n "$lanaddr" ] ; then
 444                                 dhcp_domain_add "" "$routername" "$lanaddr"
 445                         fi
 446
 447                         if [ -n "$ulaprefix" ] && [ -n "$lanaddrs6" ] ; then
 448                                 for lanaddr6 in $lanaddrs6 ; do
 449                                         case "$lanaddr6" in
 450                                         "${ulaprefix%%:/*}"*)
 451                                                 dhcp_domain_add "" "$routername" "$lanaddr6"
 452                                                 ;;
 453                                         esac
 454                                 done
 455                         fi
 456                 fi
 457         fi
 458 }
 459
 460 dhcp_tag_add() {
 461         # NOTE: dnsmasq has explicit "option6:" prefix for DHCPv6 so no collisions
 462         local cfg="$1"
 463
 464         tag="$cfg"
 465
 466         [ -n "$tag" ] || return 0
 467
 468         config_get_bool force "$cfg" force 0
 469         [ "$force" = "0" ] && force=
 470
 471         config_get option "$cfg" dhcp_option
 472         for o in $option; do
 473                 xappend "--dhcp-option${force:+-force}=tag:$tag,$o"
 474         done
 475 }
 476
 477 dhcp_mac_add() {
 478         local cfg="$1"
 479
 480         config_get networkid "$cfg" networkid
 481         [ -n "$networkid" ] || return 0
 482
 483         config_get mac "$cfg" mac
 484         [ -n "$mac" ] || return 0
 485
 486         xappend "--dhcp-mac=$networkid,$mac"
 487
 488         dhcp_option_add "$cfg" "$networkid"
 489 }
 490
 491 dhcp_boot_add() {
 492         # TODO: BOOTURL is different between DHCPv4 and DHCPv6
 493         local cfg="$1"
 494
 495         config_get networkid "$cfg" networkid
 496
 497         config_get filename "$cfg" filename
 498         [ -n "$filename" ] || return 0
 499
 500         config_get servername "$cfg" servername
 501         config_get serveraddress "$cfg" serveraddress
 502
 503         [ -n "$serveraddress" ] && [ ! -n "$servername" ] && return 0
 504
 505         xappend "--dhcp-boot=${networkid:+tag:$networkid,}${filename}${servername:+,$servername}${serveraddress:+,$serveraddress}"
 506
 507         config_get_bool force "$cfg" force 0
 508
 509         dhcp_option_add "$cfg" "$networkid" "$force"
 510 }
 511
 512 dhcp_add() {
 513         local cfg="$1"
 514         local dhcp6range="::"
 515         local nettag
 516         local tags
 517
 518         config_get net "$cfg" interface
 519         [ -n "$net" ] || return 0
 520
 521         config_get networkid "$cfg" networkid
 522         [ -n "$networkid" ] || networkid="$net"
 523
 524         network_get_device ifname "$net" || return 0
 525
 526         [ "$cachelocal" = "0" ] && network_get_dnsserver dnsserver "$net" && {
 527                 DNS_SERVERS="$DNS_SERVERS $dnsserver"
 528         }
 529
 530         append_bool "$cfg" ignore "--no-dhcp-interface=$ifname" && {
 531                 # Many ISP do not have useful names for DHCP customers (your WAN).
 532                 dhcp_this_host_add "$net" "$ifname" "$ADD_WAN_FQDN"
 533                 return 0
 534         }
 535
 536         network_get_subnet subnet "$net" || return 0
 537         network_get_protocol proto "$net" || return 0
 538
 539         # Do not support non-static interfaces for now
 540         [ static = "$proto" ] || return 0
 541
 542         ipaddr="${subnet%%/*}"
 543         prefix_or_netmask="${subnet##*/}"
 544
 545         # Override interface netmask with dhcp config if applicable
 546         config_get netmask "$cfg" netmask
 547
 548         [ -n "$netmask" ] && prefix_or_netmask="$netmask"
 549
 550         #check for an already active dhcp server on the interface, unless 'force' is set
 551         config_get_bool force "$cfg" force 0
 552         [ $force -gt 0 ] || dhcp_check "$ifname" || {
 553                 logger -t dnsmasq \
 554                         "found already running DHCP-server on interface '$ifname'" \
 555                         "refusing to start, use 'option force 1' to override"
 556                 return 0
 557         }
 558
 559         config_get start "$cfg" start 100
 560         config_get limit "$cfg" limit 150
 561         config_get leasetime "$cfg" leasetime 12h
 562         config_get options "$cfg" options
 563         config_get_bool dynamicdhcp "$cfg" dynamicdhcp 1
 564         config_get_bool dynamicdhcpv4 "$cfg" dynamicdhcpv4 $dynamicdhcp
 565         config_get_bool dynamicdhcpv6 "$cfg" dynamicdhcpv6 $dynamicdhcp
 566
 567         config_get dhcpv4 "$cfg" dhcpv4
 568         config_get dhcpv6 "$cfg" dhcpv6
 569
 570         config_get ra "$cfg" ra
 571         config_get ra_management "$cfg" ra_management
 572         config_get ra_preference "$cfg" ra_preference
 573         config_get dns "$cfg" dns
 574         config_get dns_sl "$cfg" domain
 575
 576         config_list_foreach "$cfg" "interface_name" append_interface_name "$ifname"
 577
 578         # Put the router host name on this DHCP served interface address(es)
 579         dhcp_this_host_add "$net" "$ifname" "$ADD_LOCAL_FQDN"
 580
 581         start="$( dhcp_calc "$start" )"
 582
 583         add_tag() {
 584                 tags="${tags}tag:$1,"
 585         }
 586         config_list_foreach "$cfg" tag add_tag
 587
 588         nettag="${networkid:+set:${networkid},}"
 589
 590         # make sure the DHCP range is not empty
 591         if [ "$dhcpv4" != "disabled" ] && ipcalc "$ipaddr/$prefix_or_netmask" "$start" "$limit" ; then
 592                 [ "$dynamicdhcpv4" = "0" ] && END="static"
 593
 594                 xappend "--dhcp-range=$tags$nettag$START,$END,$NETMASK,$leasetime${options:+ $options}"
 595         fi
 596
 597         if [ "$dynamicdhcpv6" = "0" ] ; then
 598                 dhcp6range="::,static"
 599         else
 600                 dhcp6range="::1000,::ffff"
 601         fi
 602
 603
 604         if [ $DNSMASQ_DHCP_VER -eq 6 ] && [ "$ra" = "server" ] ; then
 605                 # Note: dnsmasq cannot just be a DHCPv6 server (all-in-1)
 606                 # and let some other machine(s) send RA pointing to it.
 607
 608                 case $ra_preference in
 609                 *high*)
 610                         xappend "--ra-param=$ifname,high,0,7200"
 611                         ;;
 612                 *low*)
 613                         xappend "--ra-param=$ifname,low,0,7200"
 614                         ;;
 615                 *)
 616                         # Send UNSOLICITED RA at default interval and live for 2 hours.
 617                         # TODO: convert flexible lease time into route life time (only seconds).
 618                         xappend "--ra-param=$ifname,0,7200"
 619                         ;;
 620                 esac
 621
 622                 if [ "$dhcpv6" = "disabled" ] ; then
 623                         ra_management="3"
 624                 fi
 625
 626
 627                 case $ra_management in
 628                 0)
 629                         # SLACC with DCHP for extended options
 630                         xappend "--dhcp-range=$nettag::,constructor:$ifname,ra-stateless,ra-names"
 631                         ;;
 632                 2)
 633                         # DHCP address and RA only for management redirection
 634                         xappend "--dhcp-range=$nettag$dhcp6range,constructor:$ifname,$leasetime"
 635                         ;;
 636                 3)
 637                         # SLAAC only but dnsmasq attempts to link HOSTNAME, DHCPv4 MAC, and SLAAC
 638                         xappend "--dhcp-range=$nettag::,constructor:$ifname,ra-only,ra-names"
 639                         ;;
 640                 *)
 641                         # SLAAC and full DHCP
 642                         xappend "--dhcp-range=$nettag$dhcp6range,constructor:$ifname,slaac,ra-names,$leasetime"
 643                         ;;
 644                 esac
 645
 646                 if [ -n "$dns" ]; then
 647                         dnss=""
 648                         for d in $dns; do append dnss "[$d]" ","; done
 649                 else
 650                         dnss="[::]"
 651                 fi
 652
 653                 dhcp_option_append "option6:dns-server,$dnss" "$networkid"
 654
 655                 if [ -n "$dns_sl" ]; then
 656                         ddssl=""
 657                         for dd in $dns_sl; do append ddssl "$dd" ","; done
 658                 fi
 659
 660                 dhcp_option_append "option6:domain-search,$ddssl" "$networkid"
 661         fi
 662
 663         dhcp_option_add "$cfg" "$networkid" 0
 664         dhcp_option_add "$cfg" "$networkid" 2
 665 }
 666
 667 dhcp_option_append() {
 668         local option="$1"
 669         local networkid="$2"
 670         local force="$3"
 671
 672         xappend "--dhcp-option${force:+-force}=${networkid:+$networkid,}$option"
 673 }
 674
 675 dhcp_option_add() {
 676         # NOTE: dnsmasq has explicit "option6:" prefix for DHCPv6 so no collisions
 677         local cfg="$1"
 678         local networkid="$2"
 679         local force="$3"
 680         local opt="dhcp_option"
 681
 682         [ "$force" = "0" ] && force=
 683         [ "$force" = "2" ] && opt="dhcp_option_force"
 684
 685         local list_len
 686         config_get list_len "$cfg" "${opt}_LENGTH"
 687
 688         if [ -n "$list_len" ]; then
 689                 config_list_foreach "$cfg" "$opt" dhcp_option_append "$networkid" "$force"
 690         else
 691                 config_get dhcp_option "$cfg" "$opt"
 692
 693                 [ -n "$dhcp_option" ] && echo "Warning: the 'option $opt' syntax is deprecated, use 'list $opt'" >&2
 694
 695                 local option
 696                 for option in $dhcp_option; do
 697                         dhcp_option_append "$option" "$networkid" "$force"
 698                 done
 699         fi
 700 }
 701
 702 dhcp_domain_add() {
 703         local cfg="$1"
 704         local ip name names record
 705
 706         config_get names "$cfg" name "$2"
 707         [ -n "$names" ] || return 0
 708
 709         config_get ip "$cfg" ip "$3"
 710         [ -n "$ip" ] || return 0
 711
 712         for name in $names; do
 713                 record="${record:+$record }$name"
 714         done
 715
 716         echo "$ip $record" >> $HOSTFILE_TMP
 717 }
 718
 719 dhcp_srv_add() {
 720         local cfg="$1"
 721
 722         config_get srv "$cfg" srv
 723         [ -n "$srv" ] || return 0
 724
 725         config_get target "$cfg" target
 726         [ -n "$target" ] || return 0
 727
 728         config_get port "$cfg" port
 729         [ -n "$port" ] || return 0
 730
 731         config_get class "$cfg" class
 732         config_get weight "$cfg" weight
 733
 734         local service="$srv,$target,$port${class:+,$class${weight:+,$weight}}"
 735
 736         xappend "--srv-host=$service"
 737 }
 738
 739 dhcp_mx_add() {
 740         local cfg="$1"
 741         local domain relay pref
 742
 743         config_get domain "$cfg" domain
 744         [ -n "$domain" ] || return 0
 745
 746         config_get relay "$cfg" relay
 747         [ -n "$relay" ] || return 0
 748
 749         config_get pref "$cfg" pref 0
 750
 751         local service="$domain,$relay,$pref"
 752
 753         xappend "--mx-host=$service"
 754 }
 755
 756 dhcp_cname_add() {
 757         local cfg="$1"
 758         local cname target
 759
 760         config_get cname "$cfg" cname
 761         [ -n "$cname" ] || return 0
 762
 763         config_get target "$cfg" target
 764         [ -n "$target" ] || return 0
 765
 766         xappend "--cname=${cname},${target}"
 767 }
 768
 769 dhcp_hostrecord_add() {
 770         local cfg="$1"
 771         local names addresses record val
 772
 773         config_get names "$cfg" name "$2"
 774         if [ -z "$names" ]; then
 775                 return 0
 776         fi
 777
 778         config_get addresses "$cfg" ip "$3"
 779         if [ -z "$addresses" ]; then
 780                 return 0
 781         fi
 782
 783         for val in $names $addresses; do
 784                 record="${record:+$record,}$val"
 785         done
 786
 787         xappend "--host-record=$record"
 788 }
 789
 790 dhcp_relay_add() {
 791         local cfg="$1"
 792         local local_addr server_addr interface
 793
 794         config_get local_addr "$cfg" local_addr
 795         [ -n "$local_addr" ] || return 0
 796
 797         config_get server_addr "$cfg" server_addr
 798         [ -n "$server_addr" ] || return 0
 799
 800         config_get interface "$cfg" interface
 801         if [ -z "$interface" ]; then
 802                 xappend "--dhcp-relay=$local_addr,$server_addr"
 803         else
 804                 network_get_device ifname "$interface" || return
 805                 xappend "--dhcp-relay=$local_addr,$server_addr,$ifname"
 806         fi
 807 }
 808
 809 dnsmasq_ipset_add() {
 810         local cfg="$1"
 811         local ipsets nftsets domains
 812
 813         add_ipset() {
 814                 ipsets="${ipsets:+$ipsets,}$1"
 815         }
 816
 817         add_nftset() {
 818                 local IFS=,
 819                 for set in $1; do
 820                         local fam="$family"
 821                         [ -n "$fam" ] || fam=$(echo "$set" | sed -nre \
 822                                 's#^.*[^0-9]([46])$|^.*[-_]([46])[-_].*$|^([46])[^0-9].*$#\1\2\3#p')
 823                         [ -n "$fam" ] || \
 824                                 fam=$(nft -t list set "$table_family" "$table" "$set" 2>&1 | sed -nre \
 825                                 's#^\t\ttype .*\bipv([46])_addr\b.*$#\1#p')
 826
 827                         [ -n "$fam" ] || \
 828                                 logger -t dnsmasq "Cannot infer address family from non-existent nftables set '$set'"
 829
 830                         nftsets="${nftsets:+$nftsets,}${fam:+$fam#}$table_family#$table#$set"
 831                 done
 832         }
 833
 834         add_domain() {
 835                 # leading '/' is expected
 836                 domains="$domains/$1"
 837         }
 838
 839         config_get table "$cfg" table 'fw4'
 840         config_get table_family "$cfg" table_family 'inet'
 841         if [ "$table_family" = "ip" ] ; then
 842                 family="4"
 843         elif [ "$table_family" = "ip6" ] ; then
 844                 family="6"
 845         else
 846                 config_get family "$cfg" family
 847         fi
 848
 849         config_list_foreach "$cfg" "name" add_ipset
 850         config_list_foreach "$cfg" "name" add_nftset
 851         config_list_foreach "$cfg" "domain" add_domain
 852
 853         if [ -z "$ipsets" ] || [ -z "$nftsets" ] || [ -z "$domains" ]; then
 854                 return 0
 855         fi
 856
 857         xappend "--ipset=$domains/$ipsets"
 858         xappend "--nftset=$domains/$nftsets"
 859 }
 860
 861 dnsmasq_start()
 862 {
 863         local cfg="$1"
 864         local disabled user_dhcpscript logfacility
 865         local resolvfile resolvdir localuse=1
 866
 867         config_get_bool disabled "$cfg" disabled 0
 868         [ "$disabled" -gt 0 ] && return 0
 869
 870         # reset list of DOMAINS, DNS servers and EXTRA mounts (for each dnsmasq instance)
 871         DNS_SERVERS=""
 872         DOMAIN=""
 873         EXTRA_MOUNT=""
 874         CONFIGFILE="${BASECONFIGFILE}.${cfg}"
 875         CONFIGFILE_TMP="${CONFIGFILE}.$$"
 876         HOSTFILE="${BASEHOSTFILE}.${cfg}"
 877         HOSTFILE_TMP="${HOSTFILE}.$$"
 878         HOSTFILE_DIR="$(dirname "$HOSTFILE")"
 879         BASEDHCPSTAMPFILE_CFG="${BASEDHCPSTAMPFILE}.${cfg}"
 880
 881         # before we can call xappend
 882         umask u=rwx,g=rx,o=rx
 883         mkdir -p /var/run/dnsmasq/
 884         mkdir -p $(dirname $CONFIGFILE)
 885         mkdir -p "$HOSTFILE_DIR"
 886         mkdir -p /var/lib/misc
 887         chown dnsmasq:dnsmasq /var/run/dnsmasq
 888
 889         echo "# auto-generated config file from /etc/config/dhcp" > $CONFIGFILE_TMP
 890         echo "# auto-generated config file from /etc/config/dhcp" > $HOSTFILE_TMP
 891
 892         local dnsmasqconffile="/etc/dnsmasq.${cfg}.conf"
 893         if [ ! -r "$dnsmasqconffile" ]; then
 894                 dnsmasqconffile=/etc/dnsmasq.conf
 895         fi
 896
 897         # if we did this last, we could override auto-generated config
 898         [ -f "${dnsmasqconffile}" ] && {
 899                 xappend "--conf-file=${dnsmasqconffile}"
 900         }
 901
 902         $PROG --version | grep -osqE "^Compile time options:.* DHCPv6( |$)" && DHCPv6CAPABLE=1 || DHCPv6CAPABLE=0
 903
 904
 905         if [ -x /usr/sbin/odhcpd ] && [ -x /etc/init.d/odhcpd ] ; then
 906                 local odhcpd_is_main odhcpd_is_enabled
 907                 config_get odhcpd_is_main odhcpd maindhcp 0
 908                 /etc/init.d/odhcpd enabled && odhcpd_is_enabled=1 || odhcpd_is_enabled=0
 909
 910
 911                 if [ "$odhcpd_is_enabled" -eq 0 ] && [ "$DHCPv6CAPABLE" -eq 1 ] ; then
 912                         # DHCP V4 and V6 in DNSMASQ
 913                         DNSMASQ_DHCP_VER=6
 914                 elif [ "$odhcpd_is_main" -gt 0 ] ; then
 915                         # ODHCPD is doing it all
 916                         DNSMASQ_DHCP_VER=0
 917                 else
 918                         # You have ODHCPD but use DNSMASQ for DHCPV4
 919                         DNSMASQ_DHCP_VER=4
 920                 fi
 921
 922         elif [ "$DHCPv6CAPABLE" -eq 1 ] ; then
 923                 # DHCP V4 and V6 in DNSMASQ
 924                 DNSMASQ_DHCP_VER=6
 925         else
 926                 DNSMASQ_DHCP_VER=4
 927         fi
 928
 929         # Allow DHCP/DHCPv6 to be handled by ISC DHCPD
 930         if [ -x /usr/sbin/dhcpd ] ; then
 931                 if [ -x /etc/init.d/dhcpd ] ; then
 932                         /etc/init.d/dhcpd enabled && DNSMASQ_DHCP_VER=0
 933                 fi
 934                 if [ -x /etc/init.d/dhcpd6 ] && [ "$DNSMASQ_DHCP_VER" -gt 0 ] ; then
 935                         /etc/init.d/dhcpd6 enabled && DNSMASQ_DHCP_VER=4
 936                 fi
 937         fi
 938
 939         append_bool "$cfg" authoritative "--dhcp-authoritative"
 940         append_bool "$cfg" nodaemon "--no-daemon"
 941         append_bool "$cfg" domainneeded "--domain-needed"
 942         append_bool "$cfg" filterwin2k "--filterwin2k"
 943         append_bool "$cfg" nohosts "--no-hosts"
 944         append_bool "$cfg" nonegcache "--no-negcache"
 945         append_bool "$cfg" strictorder "--strict-order"
 946         append_bool "$cfg" logqueries "--log-queries=extra"
 947         append_bool "$cfg" noresolv "--no-resolv"
 948         append_bool "$cfg" localise_queries "--localise-queries"
 949         append_bool "$cfg" readethers "--read-ethers"
 950
 951         local instance_name="dnsmasq.$cfg"
 952         if [ "$cfg" = "$DEFAULT_INSTANCE" ]; then
 953                 instance_name="dnsmasq"
 954         fi
 955         config_get_bool dbus "$cfg" "dbus" 0
 956         [ $dbus -gt 0 ] && xappend "--enable-dbus=uk.org.thekelleys.$instance_name"
 957         config_get_bool ubus "$cfg" "ubus" 1
 958         [ $ubus -gt 0 ] && xappend "--enable-ubus=$instance_name"
 959
 960         append_bool "$cfg" expandhosts "--expand-hosts"
 961         config_get tftp_root "$cfg" "tftp_root"
 962         [ -n "$tftp_root" ] && mkdir -p "$tftp_root" && append_bool "$cfg" enable_tftp "--enable-tftp"
 963         append_bool "$cfg" tftp_no_fail "--tftp-no-fail"
 964         append_bool "$cfg" nonwildcard "--bind-dynamic" 1
 965         append_bool "$cfg" fqdn "--dhcp-fqdn"
 966         append_bool "$cfg" proxydnssec "--proxy-dnssec"
 967         append_bool "$cfg" localservice "--local-service"
 968         append_bool "$cfg" logdhcp "--log-dhcp"
 969         append_bool "$cfg" quietdhcp "--quiet-dhcp"
 970         append_bool "$cfg" sequential_ip "--dhcp-sequential-ip"
 971         append_bool "$cfg" allservers "--all-servers"
 972         append_bool "$cfg" noping "--no-ping"
 973         append_bool "$cfg" rapidcommit "--dhcp-rapid-commit"
 974         append_bool "$cfg" scriptarp "--script-arp"
 975
 976         append_bool "$cfg" filter_aaaa "--filter-AAAA"
 977         append_bool "$cfg" filter_a "--filter-A"
 978
 979         append_parm "$cfg" logfacility "--log-facility"
 980         config_get logfacility "$cfg" "logfacility"
 981         append_parm "$cfg" cachesize "--cache-size"
 982         append_parm "$cfg" dnsforwardmax "--dns-forward-max"
 983         append_parm "$cfg" port "--port"
 984         append_parm "$cfg" ednspacket_max "--edns-packet-max"
 985         append_parm "$cfg" dhcpleasemax "--dhcp-lease-max"
 986         append_parm "$cfg" "queryport" "--query-port"
 987         append_parm "$cfg" "minport" "--min-port"
 988         append_parm "$cfg" "maxport" "--max-port"
 989         append_parm "$cfg" "domain" "--domain"
 990         append_parm "$cfg" "local" "--local"
 991         config_list_foreach "$cfg" "listen_address" append_listenaddress
 992         config_list_foreach "$cfg" "server" append_server
 993         config_list_foreach "$cfg" "rev_server" append_rev_server
 994         config_list_foreach "$cfg" "address" append_address
 995
 996         local connmark_allowlist_enable
 997         config_get connmark_allowlist_enable "$cfg" connmark_allowlist_enable 0
 998         [ "$connmark_allowlist_enable" -gt 0 ] && {
 999                 append_parm "$cfg" "connmark_allowlist_enable" "--connmark-allowlist-enable"
1000                 config_list_foreach "$cfg" "connmark_allowlist" append_connmark_allowlist
1001         }
1002
1003         [ -n "$BOOT" ] || {
1004                 config_list_foreach "$cfg" "interface" append_interface
1005                 config_list_foreach "$cfg" "notinterface" append_notinterface
1006         }
1007         config_get_bool ignore_hosts_dir "$cfg" ignore_hosts_dir 0
1008         if [ "$ignore_hosts_dir" = "1" ]; then
1009                 xappend "--addn-hosts=$HOSTFILE"
1010                 append EXTRA_MOUNT "$HOSTFILE"
1011         else
1012                 xappend "--addn-hosts=$HOSTFILE_DIR"
1013                 append EXTRA_MOUNT "$HOSTFILE_DIR"
1014         fi
1015         config_list_foreach "$cfg" "addnhosts" append_addnhosts
1016         config_list_foreach "$cfg" "bogusnxdomain" append_bogusnxdomain
1017         append_parm "$cfg" "leasefile" "--dhcp-leasefile" "/tmp/dhcp.leases"
1018
1019         local serversfile
1020         config_get serversfile "$cfg" "serversfile"
1021         [ -n "$serversfile" ] && {
1022                 xappend "--servers-file=$serversfile"
1023                 append EXTRA_MOUNT "$serversfile"
1024         }
1025
1026         append_parm "$cfg" "tftp_root" "--tftp-root"
1027         append_parm "$cfg" "dhcp_boot" "--dhcp-boot"
1028         append_parm "$cfg" "local_ttl" "--local-ttl"
1029         append_parm "$cfg" "max_ttl" "--max-ttl"
1030         append_parm "$cfg" "min_cache_ttl" "--min-cache-ttl"
1031         append_parm "$cfg" "max_cache_ttl" "--max-cache-ttl"
1032         append_parm "$cfg" "pxe_prompt" "--pxe-prompt"
1033         append_parm "$cfg" "tftp_unique_root" "--tftp-unique-root"
1034         config_list_foreach "$cfg" "pxe_service" append_pxe_service
1035         config_get DOMAIN "$cfg" domain
1036
1037         config_get_bool ADD_LOCAL_DOMAIN "$cfg" add_local_domain 1
1038         config_get_bool ADD_LOCAL_HOSTNAME "$cfg" add_local_hostname 1
1039         config_get ADD_LOCAL_FQDN "$cfg" add_local_fqdn ""
1040         config_get ADD_WAN_FQDN "$cfg" add_wan_fqdn 0
1041
1042         if [ -z "$ADD_LOCAL_FQDN" ] ; then
1043                 # maintain support for previous UCI
1044                 ADD_LOCAL_FQDN="$ADD_LOCAL_HOSTNAME"
1045         fi
1046
1047         config_get user_dhcpscript $cfg dhcpscript
1048         if has_handler || [ -n "$user_dhcpscript" ]; then
1049                 xappend "--dhcp-script=$DHCPSCRIPT"
1050                 xappend "--script-arp"
1051         fi
1052
1053         config_get leasefile $cfg leasefile "/tmp/dhcp.leases"
1054         [ -n "$leasefile" ] && [ ! -e "$leasefile" ] && touch "$leasefile"
1055         config_get_bool cachelocal "$cfg" cachelocal 1
1056
1057         config_get_bool noresolv "$cfg" noresolv 0
1058         if [ "$noresolv" != "1" ]; then
1059                 config_get resolvfile "$cfg" resolvfile /tmp/resolv.conf.d/resolv.conf.auto
1060                 [ -n "$resolvfile" ] && [ ! -e "$resolvfile" ] && touch "$resolvfile"
1061                 xappend "--resolv-file=$resolvfile"
1062                 [ "$resolvfile" != "/tmp/resolv.conf.d/resolv.conf.auto" ] && localuse=0
1063                 resolvdir="$(dirname "$resolvfile")"
1064         fi
1065         config_get_bool localuse "$cfg" localuse "$localuse"
1066
1067         config_get hostsfile "$cfg" dhcphostsfile
1068         [ -e "$hostsfile" ] && xappend "--dhcp-hostsfile=$hostsfile"
1069
1070         local rebind
1071         config_get_bool rebind "$cfg" rebind_protection 1
1072         [ $rebind -gt 0 ] && {
1073                 log_once \
1074                         "DNS rebinding protection is active," \
1075                         "will discard upstream RFC1918 responses!"
1076                 xappend "--stop-dns-rebind"
1077
1078                 local rebind_localhost
1079                 config_get_bool rebind_localhost "$cfg" rebind_localhost 0
1080                 [ $rebind_localhost -gt 0 ] && {
1081                         log_once "Allowing 127.0.0.0/8 responses"
1082                         xappend "--rebind-localhost-ok"
1083                 }
1084
1085                 append_rebind_domain() {
1086                         log_once "Allowing RFC1918 responses for domain $1"
1087                         xappend "--rebind-domain-ok=$1"
1088                 }
1089
1090                 config_list_foreach "$cfg" rebind_domain append_rebind_domain
1091         }
1092
1093         config_get_bool dnssec "$cfg" dnssec 0
1094         [ "$dnssec" -gt 0 ] && {
1095                 xappend "--conf-file=$TRUSTANCHORSFILE"
1096                 xappend "--dnssec"
1097                 [ -x /etc/init.d/sysntpd ] && {
1098                         if /etc/init.d/sysntpd enabled || [ "$(uci_get system.ntp.enabled)" = "1" ] ; then
1099                                 [ -f "$TIMEVALIDFILE" ] || xappend "--dnssec-no-timecheck"
1100                         fi
1101                 }
1102                 config_get_bool dnsseccheckunsigned "$cfg" dnsseccheckunsigned 1
1103                 [ "$dnsseccheckunsigned" -eq 0 ] && xappend "--dnssec-check-unsigned=no"
1104         }
1105
1106         config_get addmac "$cfg" addmac 0
1107         [ "$addmac" != "0" ] && {
1108                 [ "$addmac" = "1" ] && addmac=
1109                 xappend "--add-mac${addmac:+="$addmac"}"
1110         }
1111
1112         dhcp_option_add "$cfg" "" 0
1113         dhcp_option_add "$cfg" "" 2
1114
1115         xappend "--dhcp-broadcast=tag:needs-broadcast"
1116
1117
1118         config_get dnsmasqconfdir "$cfg" confdir "/tmp/dnsmasq.d"
1119         xappend "--conf-dir=$dnsmasqconfdir"
1120         dnsmasqconfdir="${dnsmasqconfdir%%,*}"
1121         [ ! -d "$dnsmasqconfdir" ] && mkdir -p $dnsmasqconfdir
1122         xappend "--user=dnsmasq"
1123         xappend "--group=dnsmasq"
1124         echo >> $CONFIGFILE_TMP
1125
1126         config_get_bool enable_tftp "$cfg" enable_tftp 0
1127         [ "$enable_tftp" -gt 0 ] && {
1128                 config_get tftp_root "$cfg" tftp_root
1129                 append EXTRA_MOUNT $tftp_root
1130         }
1131
1132         config_foreach filter_dnsmasq host dhcp_host_add "$cfg"
1133         echo >> $CONFIGFILE_TMP
1134
1135         config_get_bool dhcpbogushostname "$cfg" dhcpbogushostname 1
1136         [ "$dhcpbogushostname" -gt 0 ] && {
1137                 xappend "--dhcp-ignore-names=tag:dhcp_bogus_hostname"
1138                 [ -r "$DHCPBOGUSHOSTNAMEFILE" ] && xappend "--conf-file=$DHCPBOGUSHOSTNAMEFILE"
1139         }
1140
1141         config_foreach filter_dnsmasq boot dhcp_boot_add "$cfg"
1142         config_foreach filter_dnsmasq mac dhcp_mac_add "$cfg"
1143         config_foreach filter_dnsmasq tag dhcp_tag_add "$cfg"
1144         config_foreach filter_dnsmasq vendorclass dhcp_vendorclass_add "$cfg"
1145         config_foreach filter_dnsmasq userclass dhcp_userclass_add "$cfg"
1146         config_foreach filter_dnsmasq circuitid dhcp_circuitid_add "$cfg"
1147         config_foreach filter_dnsmasq remoteid dhcp_remoteid_add "$cfg"
1148         config_foreach filter_dnsmasq subscrid dhcp_subscrid_add "$cfg"
1149         config_foreach filter_dnsmasq match dhcp_match_add "$cfg"
1150         config_foreach filter_dnsmasq domain dhcp_domain_add "$cfg"
1151         config_foreach filter_dnsmasq hostrecord dhcp_hostrecord_add "$cfg"
1152         [ -n "$BOOT" ] || config_foreach filter_dnsmasq relay dhcp_relay_add "$cfg"
1153
1154         echo >> $CONFIGFILE_TMP
1155         config_foreach filter_dnsmasq srvhost dhcp_srv_add "$cfg"
1156         config_foreach filter_dnsmasq mxhost dhcp_mx_add "$cfg"
1157         echo >> $CONFIGFILE_TMP
1158
1159         config_get_bool boguspriv "$cfg" boguspriv 1
1160         [ "$boguspriv" -gt 0 ] && {
1161                 xappend "--bogus-priv"
1162                 [ -r "$RFC6761FILE" ] && xappend "--conf-file=$RFC6761FILE"
1163         }
1164
1165         if [ "$DNSMASQ_DHCP_VER" -gt 4 ] ; then
1166                 # Enable RA feature for when/if it is constructed,
1167                 # and RA is selected per interface pool (RA, DHCP, or both),
1168                 # but no one (should) want RA broadcast in syslog
1169                 [ -n "$BOOT" ] || config_foreach filter_dnsmasq dhcp dhcp_add "$cfg"
1170                 xappend "--enable-ra"
1171                 xappend "--quiet-ra"
1172                 append_bool "$cfg" quietdhcp "--quiet-dhcp6"
1173
1174         elif [ "$DNSMASQ_DHCP_VER" -gt 0 ] ; then
1175                 [ -n "$BOOT" ] || config_foreach filter_dnsmasq dhcp dhcp_add "$cfg"
1176         fi
1177
1178
1179         echo >> $CONFIGFILE_TMP
1180         config_foreach filter_dnsmasq cname dhcp_cname_add "$cfg"
1181         echo >> $CONFIGFILE_TMP
1182
1183         echo >> $CONFIGFILE_TMP
1184         config_foreach filter_dnsmasq ipset dnsmasq_ipset_add "$cfg"
1185         echo >> $CONFIGFILE_TMP
1186
1187         mv -f $CONFIGFILE_TMP $CONFIGFILE
1188         mv -f $HOSTFILE_TMP $HOSTFILE
1189
1190         [ "$localuse" -gt 0 ] && {
1191                 rm -f /tmp/resolv.conf
1192                 [ $ADD_LOCAL_DOMAIN -eq 1 ] && [ -n "$DOMAIN" ] && {
1193                         echo "search $DOMAIN" >> /tmp/resolv.conf
1194                 }
1195                 DNS_SERVERS="$DNS_SERVERS 127.0.0.1"
1196                 [ -e /proc/sys/net/ipv6 ] && DNS_SERVERS="$DNS_SERVERS ::1"
1197                 for DNS_SERVER in $DNS_SERVERS ; do
1198                         echo "nameserver $DNS_SERVER" >> /tmp/resolv.conf
1199                 done
1200         }
1201
1202         config_list_foreach "$cfg" addnmount append_extramount
1203
1204         procd_open_instance $cfg
1205         procd_set_param command $PROG -C $CONFIGFILE -k -x /var/run/dnsmasq/dnsmasq."${cfg}".pid
1206         procd_set_param file $CONFIGFILE
1207         [ -n "$user_dhcpscript" ] && procd_set_param env USER_DHCPSCRIPT="$user_dhcpscript"
1208         procd_set_param respawn
1209
1210         local instance_ifc instance_netdev
1211         config_get instance_ifc "$cfg" interface
1212         [ -n "$instance_ifc" ] && network_get_device instance_netdev "$instance_ifc" &&
1213                 [ -n "$instance_netdev" ] && procd_set_param netdev $instance_netdev
1214
1215         procd_add_jail dnsmasq ubus log
1216         procd_add_jail_mount $CONFIGFILE $DHCPBOGUSHOSTNAMEFILE $DHCPSCRIPT $DHCPSCRIPT_DEPENDS
1217         procd_add_jail_mount $EXTRA_MOUNT $RFC6761FILE $TRUSTANCHORSFILE
1218         procd_add_jail_mount $dnsmasqconffile $dnsmasqconfdir $resolvdir $user_dhcpscript
1219         procd_add_jail_mount /etc/passwd /etc/group /etc/TZ /etc/hosts /etc/ethers
1220         procd_add_jail_mount_rw /var/run/dnsmasq/ $leasefile
1221         case "$logfacility" in */*)
1222                 [ ! -e "$logfacility" ] && touch "$logfacility"
1223                 procd_add_jail_mount_rw "$logfacility"
1224         esac
1225         [ -e "$hostsfile" ] && procd_add_jail_mount $hostsfile
1226
1227         procd_close_instance
1228 }
1229
1230 dnsmasq_stop()
1231 {
1232         local cfg="$1"
1233         local noresolv resolvfile localuse=1
1234
1235         config_get_bool noresolv "$cfg" noresolv 0
1236         config_get resolvfile "$cfg" "resolvfile"
1237
1238         [ "$noresolv" = 0 ] && [ "$resolvfile" != "/tmp/resolv.conf.d/resolv.conf.auto" ] && localuse=0
1239         config_get_bool localuse "$cfg" localuse "$localuse"
1240         [ "$localuse" -gt 0 ] && ln -sf "/tmp/resolv.conf.d/resolv.conf.auto" /tmp/resolv.conf
1241
1242         rm -f ${BASEDHCPSTAMPFILE}.${cfg}.*.dhcp
1243 }
1244
1245 add_interface_trigger()
1246 {
1247         local interface ifname ignore
1248
1249         config_get interface "$1" interface
1250         config_get_bool ignore "$1" ignore 0
1251         network_get_device ifname "$interface" || ignore=0
1252
1253         [ -n "$interface" ] && [ $ignore -eq 0 ] && procd_add_interface_trigger "interface.*" "$interface" /etc/init.d/dnsmasq reload
1254 }
1255
1256 service_triggers()
1257 {
1258         procd_add_reload_trigger "dhcp" "system"
1259
1260         config_load dhcp
1261         config_foreach add_interface_trigger dhcp
1262         config_foreach add_interface_trigger relay
1263 }
1264
1265 boot()
1266 {
1267         BOOT=1
1268         start "$@"
1269 }
1270
1271 start_service() {
1272         local instance="$1"
1273         local instance_found=0
1274         local first_instance=""
1275
1276         . /lib/functions/network.sh
1277
1278         config_cb() {
1279                 local type="$1"
1280                 local name="$2"
1281                 if [ "$type" = "dnsmasq" ]; then
1282                         if [ -n "$instance" ] && [ "$instance" = "$name" ]; then
1283                                 instance_found=1
1284                         fi
1285                         if [ -z "$DEFAULT_INSTANCE" ]; then
1286                                 local disabled
1287                                 config_get_bool disabled "$name" disabled 0
1288                                 if [ "$disabled" -eq 0 ]; then
1289                                         # First enabled section will be assigned default instance name.
1290                                         # Unnamed sections get precedence over named sections.
1291                                         if expr "$cfg" : 'cfg[0-9a-f]*$' >/dev/null = "9"; then # See uci_fixup_section.
1292                                                 DEFAULT_INSTANCE="$name" # Unnamed config section.
1293                                         elif [ -z "$first_instance" ]; then
1294                                                 first_instance="$name"
1295                                         fi
1296                                 fi
1297                         fi
1298                 fi
1299         }
1300
1301         DEFAULT_INSTANCE=""
1302         config_load dhcp
1303         if [ -z "$DEFAULT_INSTANCE" ]; then
1304                 DEFAULT_INSTANCE="$first_instance" # No unnamed config section was found.
1305         fi
1306
1307         if [ -n "$instance" ]; then
1308                 [ "$instance_found" -gt 0 ] || return
1309                 dnsmasq_start "$instance"
1310         else
1311                 config_foreach dnsmasq_start dnsmasq
1312         fi
1313 }
1314
1315 reload_service() {
1316         rc_procd start_service "$@"
1317         procd_send_signal dnsmasq "$@"
1318 }
1319
1320 stop_service() {
1321         local instance="$1"
1322         local instance_found=0
1323
1324         config_cb() {
1325                 local type="$1"
1326                 local name="$2"
1327                 if [ "$type" = "dnsmasq" ]; then
1328                         if [ -n "$instance" ] && [ "$instance" = "$name" ]; then
1329                                 instance_found=1
1330                         fi
1331                 fi
1332         }
1333
1334         config_load dhcp
1335
1336         if [ -n "$instance" ]; then
1337                 [ "$instance_found" -gt 0 ] || return
1338                 dnsmasq_stop "$instance"
1339         else
1340                 config_foreach dnsmasq_stop dnsmasq
1341         fi
1342 }