package/network/services/dnsmasq/files/dnsmasq.init

   1 #!/bin/sh /etc/rc.common
   2 # Copyright (C) 2007-2012 OpenWrt.org
   3
   4 . /lib/functions.sh
   5
   6 START=19
   7
   8 USE_PROCD=1
   9 PROG=/usr/sbin/dnsmasq
  10
  11 ADD_LOCAL_DOMAIN=1
  12 ADD_LOCAL_HOSTNAME=1
  13 ADD_WAN_FQDN=0
  14 ADD_LOCAL_FQDN=""
  15
  16 BASECONFIGFILE="/var/etc/dnsmasq.conf"
  17 BASEHOSTFILE="/tmp/hosts/dhcp"
  18 TRUSTANCHORSFILE="/usr/share/dnsmasq/trust-anchors.conf"
  19 TIMEVALIDFILE="/var/state/dnsmasqsec"
  20 BASEDHCPSTAMPFILE="/var/run/dnsmasq"
  21 DHCPBOGUSHOSTNAMEFILE="/usr/share/dnsmasq/dhcpbogushostname.conf"
  22 RFC6761FILE="/usr/share/dnsmasq/rfc6761.conf"
  23 DHCPSCRIPT="/usr/lib/dnsmasq/dhcp-script.sh"
  24 DHCPSCRIPT_DEPENDS="/usr/share/libubox/jshn.sh /usr/bin/jshn /bin/ubus"
  25
  26 DNSMASQ_DHCP_VER=4
  27
  28 dnsmasq_ignore_opt() {
  29         local opt="$1"
  30
  31         if [ -z "$dnsmasq_features" ]; then
  32                 dnsmasq_features="$(dnsmasq --version | grep -m1 'Compile time options:' | cut -d: -f2) "
  33                 [ "${dnsmasq_features#* DHCP }" = "$dnsmasq_features" ] || dnsmasq_has_dhcp=1
  34                 [ "${dnsmasq_features#* DHCPv6 }" = "$dnsmasq_features" ] || dnsmasq_has_dhcp6=1
  35                 [ "${dnsmasq_features#* DNSSEC }" = "$dnsmasq_features" ] || dnsmasq_has_dnssec=1
  36                 [ "${dnsmasq_features#* TFTP }" = "$dnsmasq_features" ] || dnsmasq_has_tftp=1
  37                 [ "${dnsmasq_features#* ipset }" = "$dnsmasq_features" ] || dnsmasq_has_ipset=1
  38                 [ "${dnsmasq_features#* nftset }" = "$dnsmasq_features" ] || dnsmasq_has_nftset=1
  39         fi
  40
  41         case "$opt" in
  42                 dhcp-duid|\
  43                 ra-param)
  44                         [ -z "$dnsmasq_has_dhcp6" ] ;;
  45                 dhcp-*|\
  46                 bootp-*|\
  47                 pxe-*)
  48                         [ -z "$dnsmasq_has_dhcp" ] ;;
  49                 dnssec*|\
  50                 trust-anchor)
  51                         if [ -z "$dnsmasq_has_dnssec" ]; then
  52                                 echo "dnsmasq: \"$opt\" requested, but dnssec support is not available" >&2
  53                                 exit 1
  54                         fi
  55                         return 1
  56                         ;;
  57                 tftp-*)
  58                         [ -z "$dnsmasq_has_tftp" ] ;;
  59                 ipset)
  60                         [ -z "$dnsmasq_has_ipset" ] ;;
  61                 nftset)
  62                         [ -z "$dnsmasq_has_nftset" ] ;;
  63                 *)
  64                         return 1
  65         esac
  66 }
  67
  68 xappend() {
  69         local value="${1#--}"
  70         local opt="${value%%=*}"
  71
  72         if ! dnsmasq_ignore_opt "$opt"; then
  73                 echo "$value" >>$CONFIGFILE_TMP
  74         fi
  75 }
  76
  77 hex_to_hostid() {
  78         local var="$1"
  79         local hex="${2#0x}" # strip optional "0x" prefix
  80
  81         if [ -n "${hex//[0-9a-fA-F]/}" ]; then
  82                 # is invalid hex literal
  83                 return 1
  84         fi
  85
  86         # convert into host id
  87         export "$var=$(
  88                 printf "%0x:%0x" \
  89                 $(((0x$hex >> 16) % 65536)) \
  90                 $(( 0x$hex        % 65536))
  91                 )"
  92
  93         return 0
  94 }
  95
  96 dhcp_calc() {
  97         local ip="$1"
  98         local res=0
  99
 100         while [ -n "$ip" ]; do
 101                 part="${ip%%.*}"
 102                 res="$(($res * 256))"
 103                 res="$(($res + $part))"
 104                 [ "${ip%.*}" != "$ip" ] && ip="${ip#*.}" || ip=
 105         done
 106         echo "$res"
 107 }
 108
 109 dhcp_check() {
 110         local ifname="$1"
 111         local stamp="${BASEDHCPSTAMPFILE_CFG}.${ifname}.dhcp"
 112         local rv=0
 113
 114         [ -s "$stamp" ] && return $(cat "$stamp")
 115
 116         # If interface is down, skip it.
 117         # The init script will be called again once the link is up
 118         case "$(devstatus "$ifname" | jsonfilter -e @.up)" in
 119                 false) return 1;;
 120         esac
 121
 122         udhcpc -n -q -s /bin/true -t 1 -i "$ifname" >&- && rv=1 || rv=0
 123
 124         echo $rv > "$stamp"
 125         return $rv
 126 }
 127
 128 log_once() {
 129         pidof dnsmasq >/dev/null || \
 130                 logger -t dnsmasq "$@"
 131 }
 132
 133 has_handler() {
 134         local file
 135
 136         for file in /etc/hotplug.d/dhcp/* /etc/hotplug.d/tftp/* /etc/hotplug.d/neigh/*; do
 137                 [ -f "$file" ] && return 0
 138         done
 139
 140         return 1
 141 }
 142
 143 append_bool() {
 144         local section="$1"
 145         local option="$2"
 146         local value="$3"
 147         local default="$4"
 148         local _loctmp
 149         [ -z "$default" ] && default="0"
 150         config_get_bool _loctmp "$section" "$option" "$default"
 151         [ $_loctmp -gt 0 ] && xappend "$value"
 152 }
 153
 154 append_parm() {
 155         local section="$1"
 156         local option="$2"
 157         local switch="$3"
 158         local default="$4"
 159         local _loctmp
 160         config_get _loctmp "$section" "$option" "$default"
 161         [ -z "$_loctmp" ] && return 0
 162         xappend "$switch=$_loctmp"
 163 }
 164
 165 append_server() {
 166         xappend "--server=$1"
 167 }
 168
 169 append_rev_server() {
 170         xappend "--rev-server=$1"
 171 }
 172
 173 append_address() {
 174         xappend "--address=$1"
 175 }
 176
 177 append_connmark_allowlist() {
 178         xappend "--connmark-allowlist=$1"
 179 }
 180
 181 append_interface() {
 182         network_get_device ifname "$1" || ifname="$1"
 183         xappend "--interface=$ifname"
 184 }
 185
 186 append_listenaddress() {
 187         xappend "--listen-address=$1"
 188 }
 189
 190 append_notinterface() {
 191         network_get_device ifname "$1" || ifname="$1"
 192         xappend "--except-interface=$ifname"
 193 }
 194
 195 ismounted() {
 196         local filename="$1"
 197         local dirname
 198         for dirname in $EXTRA_MOUNT ; do
 199                 case "$filename" in
 200                         "${dirname}/"* | "${dirname}" )
 201                                 return 0
 202                                 ;;
 203                 esac
 204         done
 205
 206         return 1
 207 }
 208
 209 append_extramount() {
 210         ismounted "$1" || append EXTRA_MOUNT "$1"
 211 }
 212
 213 append_addnhosts() {
 214         append_extramount "$1"
 215         xappend "--addn-hosts=$1"
 216 }
 217
 218 append_bogusnxdomain() {
 219         xappend "--bogus-nxdomain=$1"
 220 }
 221
 222 append_pxe_service() {
 223         xappend "--pxe-service=$1"
 224 }
 225
 226 append_interface_name() {
 227         xappend "--interface-name=$1,$2"
 228 }
 229
 230 filter_dnsmasq() {
 231         local cfg="$1" func="$2" match_cfg="$3" found_cfg
 232
 233         # use entry when no instance entry set, or if it matches
 234         config_get found_cfg "$cfg" "instance"
 235         if [ -z "$found_cfg" ] || [ "$found_cfg" = "$match_cfg" ]; then
 236                 $func $cfg
 237         fi
 238 }
 239
 240 dhcp_subscrid_add() {
 241         local cfg="$1"
 242
 243         config_get networkid "$cfg" networkid
 244         [ -n "$networkid" ] || return 0
 245
 246         config_get subscriberid "$cfg" subscriberid
 247         [ -n "$subscriberid" ] || return 0
 248
 249         xappend "--dhcp-subscrid=set:$networkid,$subscriberid"
 250
 251         config_get_bool force "$cfg" force 0
 252
 253         dhcp_option_add "$cfg" "$networkid" "$force"
 254 }
 255
 256 dhcp_remoteid_add() {
 257         local cfg="$1"
 258
 259         config_get networkid "$cfg" networkid
 260         [ -n "$networkid" ] || return 0
 261
 262         config_get remoteid "$cfg" remoteid
 263         [ -n "$remoteid" ] || return 0
 264
 265         xappend "--dhcp-remoteid=set:$networkid,$remoteid"
 266
 267         config_get_bool force "$cfg" force 0
 268
 269         dhcp_option_add "$cfg" "$networkid" "$force"
 270 }
 271
 272 dhcp_circuitid_add() {
 273         # TODO: DHCPV6 does not have circuitid; catch "option6:"
 274         local cfg="$1"
 275
 276         config_get networkid "$cfg" networkid
 277         [ -n "$networkid" ] || return 0
 278
 279         config_get circuitid "$cfg" circuitid
 280         [ -n "$circuitid" ] || return 0
 281
 282         xappend "--dhcp-circuitid=set:$networkid,$circuitid"
 283
 284         config_get_bool force "$cfg" force 0
 285
 286         dhcp_option_add "$cfg" "$networkid" "$force"
 287 }
 288
 289 dhcp_userclass_add() {
 290         local cfg="$1"
 291
 292         config_get networkid "$cfg" networkid
 293         [ -n "$networkid" ] || return 0
 294
 295         config_get userclass "$cfg" userclass
 296         [ -n "$userclass" ] || return 0
 297
 298         xappend "--dhcp-userclass=set:$networkid,$userclass"
 299
 300         config_get_bool force "$cfg" force 0
 301
 302         dhcp_option_add "$cfg" "$networkid" "$force"
 303 }
 304
 305 dhcp_vendorclass_add() {
 306         # TODO: DHCPV6 vendor class has stricter definitions; catch? fixup?
 307         local cfg="$1"
 308
 309         config_get networkid "$cfg" networkid
 310         [ -n "$networkid" ] || return 0
 311
 312         config_get vendorclass "$cfg" vendorclass
 313         [ -n "$vendorclass" ] || return 0
 314
 315         xappend "--dhcp-vendorclass=set:$networkid,$vendorclass"
 316
 317         config_get_bool force "$cfg" force 0
 318
 319         dhcp_option_add "$cfg" "$networkid" "$force"
 320 }
 321
 322 dhcp_match_add() {
 323         local cfg="$1"
 324
 325         config_get networkid "$cfg" networkid
 326         [ -n "$networkid" ] || return 0
 327
 328         config_get match "$cfg" match
 329         [ -n "$match" ] || return 0
 330
 331         xappend "--dhcp-match=set:$networkid,$match"
 332
 333         config_get_bool force "$cfg" force 0
 334
 335         dhcp_option_add "$cfg" "$networkid" "$force"
 336 }
 337
 338 dhcp_host_add() {
 339         local cfg="$1"
 340         local hosttag nametime addrs duids macs tags mtags
 341
 342         config_get_bool force "$cfg" force 0
 343
 344         config_get networkid "$cfg" networkid
 345         [ -n "$networkid" ] && dhcp_option_add "$cfg" "$networkid" "$force"
 346
 347         config_get_bool enable "$cfg" enable 1
 348         [ "$enable" = "0" ] && return 0
 349
 350         config_get name "$cfg" name
 351         config_get ip "$cfg" ip
 352         config_get hostid "$cfg" hostid
 353
 354         [ -z "$ip" ] && [ -z "$name" ] && [ -z "$hostid" ] && return 0
 355
 356         config_get_bool dns "$cfg" dns 0
 357         [ "$dns" = "1" ] && [ -n "$ip" ] && [ -n "$name" ] && {
 358                 echo "$ip $name${DOMAIN:+.$DOMAIN}" >> $HOSTFILE_TMP
 359         }
 360
 361         config_get mac "$cfg" mac
 362         config_get duid "$cfg" duid
 363         config_get tag "$cfg" tag
 364
 365         add_tag() {
 366                 mtags="${mtags}tag:$1,"
 367         }
 368         config_list_foreach "$cfg" match_tag add_tag
 369
 370         if [ -n "$mac" ]; then
 371                 # --dhcp-host=00:20:e0:3b:13:af,192.168.0.199,lap
 372                 # many MAC are possible to track a laptop ON/OFF dock
 373                 for m in $mac; do append macs "$m" ","; done
 374         fi
 375
 376         if [ $DNSMASQ_DHCP_VER -eq 6 ] && [ -n "$duid" ]; then
 377                 # --dhcp-host=id:00:03:00:01:12:00:00:01:02:03,[::beef],lap
 378                 # one (virtual) machine gets one DUID per RFC3315
 379                 duids="id:${duid// */}"
 380         fi
 381
 382         if [ -z "$macs" ] && [ -z "$duids" ]; then
 383                 # --dhcp-host=lap,192.168.0.199,[::beef]
 384                 [ -n "$name" ] || return 0
 385                 macs="$name"
 386                 name=""
 387         fi
 388
 389         if [ -n "$hostid" ]; then
 390                 hex_to_hostid hostid "$hostid"
 391         fi
 392
 393         if [ -n "$tag" ]; then
 394                 for t in $tag; do append tags "$t" ",set:"; done
 395         fi
 396
 397         config_get_bool broadcast "$cfg" broadcast 0
 398         config_get leasetime "$cfg" leasetime
 399
 400         [ "$broadcast" = "0" ] && broadcast= || broadcast=",set:needs-broadcast"
 401
 402         hosttag="${networkid:+,set:${networkid}}${tags:+,set:${tags}}$broadcast"
 403         nametime="${name:+,$name}${leasetime:+,$leasetime}"
 404
 405         if [ $DNSMASQ_DHCP_VER -eq 6 ]; then
 406                 addrs="${ip:+,$ip}${hostid:+,[::$hostid]}"
 407                 xappend "--dhcp-host=$mtags$macs${duids:+,$duids}$hosttag$addrs$nametime"
 408         else
 409                 xappend "--dhcp-host=$mtags$macs$hosttag${ip:+,$ip}$nametime"
 410         fi
 411 }
 412
 413 dhcp_this_host_add() {
 414         local net="$1"
 415         local ifname="$2"
 416         local mode="$3"
 417         local routerstub routername ifdashname
 418         local lanaddr lanaddr6 lanaddrs6 ulaprefix
 419
 420         if [ "$mode" -gt 0 ] ; then
 421                 ifdashname="${ifname//./-}"
 422                 routerstub="$( md5sum /etc/os-release )"
 423                 routerstub="router-${routerstub// */}"
 424                 routername="$( uci_get system @system[0] hostname $routerstub )"
 425
 426                 if [ "$mode" -gt 1 ] ; then
 427                         if [ "$mode" -gt 2 ] ; then
 428                                 if [ "$mode" -gt 3 ] ; then
 429                                         append_interface_name "$ifdashname.$routername.$DOMAIN" "$ifname"
 430                                 fi
 431
 432                                 append_interface_name "$routername.$DOMAIN" "$ifname"
 433                         fi
 434
 435                         # All IP addresses discovered by dnsmasq will be labeled (except fe80::)
 436                         append_interface_name "$routername" "$ifname"
 437
 438                 else
 439                         # This uses a static host file entry for only limited addresses.
 440                         # Use dnsmasq option "--expandhosts" to enable FQDN on host files.
 441                         ulaprefix="$(uci_get network @globals[0] ula_prefix)"
 442                         network_get_ipaddr lanaddr "$net"
 443                         network_get_ipaddrs6 lanaddrs6 "$net"
 444
 445                         if [ -n "$lanaddr" ] ; then
 446                                 dhcp_domain_add "" "$routername" "$lanaddr"
 447                         fi
 448
 449                         if [ -n "$ulaprefix" ] && [ -n "$lanaddrs6" ] ; then
 450                                 for lanaddr6 in $lanaddrs6 ; do
 451                                         case "$lanaddr6" in
 452                                         "${ulaprefix%%:/*}"*)
 453                                                 dhcp_domain_add "" "$routername" "$lanaddr6"
 454                                                 ;;
 455                                         esac
 456                                 done
 457                         fi
 458                 fi
 459         fi
 460 }
 461
 462 dhcp_tag_add() {
 463         # NOTE: dnsmasq has explicit "option6:" prefix for DHCPv6 so no collisions
 464         local cfg="$1"
 465
 466         tag="$cfg"
 467
 468         [ -n "$tag" ] || return 0
 469
 470         config_get_bool force "$cfg" force 0
 471         [ "$force" = "0" ] && force=
 472
 473         config_get option "$cfg" dhcp_option
 474         for o in $option; do
 475                 xappend "--dhcp-option${force:+-force}=tag:$tag,$o"
 476         done
 477 }
 478
 479 dhcp_mac_add() {
 480         local cfg="$1"
 481
 482         config_get networkid "$cfg" networkid
 483         [ -n "$networkid" ] || return 0
 484
 485         config_get mac "$cfg" mac
 486         [ -n "$mac" ] || return 0
 487
 488         xappend "--dhcp-mac=$networkid,$mac"
 489
 490         dhcp_option_add "$cfg" "$networkid"
 491 }
 492
 493 dhcp_boot_add() {
 494         # TODO: BOOTURL is different between DHCPv4 and DHCPv6
 495         local cfg="$1"
 496
 497         config_get networkid "$cfg" networkid
 498
 499         config_get filename "$cfg" filename
 500         [ -n "$filename" ] || return 0
 501
 502         config_get servername "$cfg" servername
 503         config_get serveraddress "$cfg" serveraddress
 504
 505         [ -n "$serveraddress" ] && [ ! -n "$servername" ] && return 0
 506
 507         xappend "--dhcp-boot=${networkid:+net:$networkid,}${filename}${servername:+,$servername}${serveraddress:+,$serveraddress}"
 508
 509         config_get_bool force "$cfg" force 0
 510
 511         dhcp_option_add "$cfg" "$networkid" "$force"
 512 }
 513
 514 dhcp_add() {
 515         local cfg="$1"
 516         local dhcp6range="::"
 517         local nettag
 518         local tags
 519
 520         config_get net "$cfg" interface
 521         [ -n "$net" ] || return 0
 522
 523         config_get networkid "$cfg" networkid
 524         [ -n "$networkid" ] || networkid="$net"
 525
 526         network_get_device ifname "$net" || return 0
 527
 528         [ "$cachelocal" = "0" ] && network_get_dnsserver dnsserver "$net" && {
 529                 DNS_SERVERS="$DNS_SERVERS $dnsserver"
 530         }
 531
 532         append_bool "$cfg" ignore "--no-dhcp-interface=$ifname" && {
 533                 # Many ISP do not have useful names for DHCP customers (your WAN).
 534                 dhcp_this_host_add "$net" "$ifname" "$ADD_WAN_FQDN"
 535                 return 0
 536         }
 537
 538         network_get_subnet subnet "$net" || return 0
 539         network_get_protocol proto "$net" || return 0
 540
 541         # Do not support non-static interfaces for now
 542         [ static = "$proto" ] || return 0
 543
 544         # Override interface netmask with dhcp config if applicable
 545         config_get netmask "$cfg" netmask "${subnet##*/}"
 546
 547         #check for an already active dhcp server on the interface, unless 'force' is set
 548         config_get_bool force "$cfg" force 0
 549         [ $force -gt 0 ] || dhcp_check "$ifname" || {
 550                 logger -t dnsmasq \
 551                         "found already running DHCP-server on interface '$ifname'" \
 552                         "refusing to start, use 'option force 1' to override"
 553                 return 0
 554         }
 555
 556         config_get start "$cfg" start 100
 557         config_get limit "$cfg" limit 150
 558         config_get leasetime "$cfg" leasetime 12h
 559         config_get options "$cfg" options
 560         config_get_bool dynamicdhcp "$cfg" dynamicdhcp 1
 561         config_get_bool dynamicdhcpv4 "$cfg" dynamicdhcpv4 $dynamicdhcp
 562         config_get_bool dynamicdhcpv6 "$cfg" dynamicdhcpv6 $dynamicdhcp
 563
 564         config_get dhcpv4 "$cfg" dhcpv4
 565         config_get dhcpv6 "$cfg" dhcpv6
 566
 567         config_get ra "$cfg" ra
 568         config_get ra_management "$cfg" ra_management
 569         config_get ra_preference "$cfg" ra_preference
 570         config_get dns "$cfg" dns
 571
 572         config_list_foreach "$cfg" "interface_name" append_interface_name "$ifname"
 573
 574         # Put the router host name on this DHCP served interface address(es)
 575         dhcp_this_host_add "$net" "$ifname" "$ADD_LOCAL_FQDN"
 576
 577         start="$( dhcp_calc "$start" )"
 578
 579         add_tag() {
 580                 tags="${tags}tag:$1,"
 581         }
 582         config_list_foreach "$cfg" tag add_tag
 583
 584         nettag="${networkid:+set:${networkid},}"
 585
 586         # make sure the DHCP range is not empty
 587         if [ "$dhcpv4" != "disabled" ] && ipcalc "${subnet%%/*}" "$netmask" "$start" "$limit" ; then
 588                 [ "$dynamicdhcpv4" = "0" ] && END="static"
 589
 590                 xappend "--dhcp-range=$tags$nettag$START,$END,$NETMASK,$leasetime${options:+ $options}"
 591         fi
 592
 593         if [ "$dynamicdhcpv6" = "0" ] ; then
 594                 dhcp6range="::,static"
 595         else
 596                 dhcp6range="::1000,::ffff"
 597         fi
 598
 599
 600         if [ $DNSMASQ_DHCP_VER -eq 6 ] && [ "$ra" = "server" ] ; then
 601                 # Note: dnsmasq cannot just be a DHCPv6 server (all-in-1)
 602                 # and let some other machine(s) send RA pointing to it.
 603
 604                 case $ra_preference in
 605                 *high*)
 606                         xappend "--ra-param=$ifname,high,0,7200"
 607                         ;;
 608                 *low*)
 609                         xappend "--ra-param=$ifname,low,0,7200"
 610                         ;;
 611                 *)
 612                         # Send UNSOLICITED RA at default interval and live for 2 hours.
 613                         # TODO: convert flexible lease time into route life time (only seconds).
 614                         xappend "--ra-param=$ifname,0,7200"
 615                         ;;
 616                 esac
 617
 618                 if [ "$dhcpv6" = "disabled" ] ; then
 619                         ra_management="3"
 620                 fi
 621
 622
 623                 case $ra_management in
 624                 0)
 625                         # SLACC with DCHP for extended options
 626                         xappend "--dhcp-range=$nettag::,constructor:$ifname,ra-stateless,ra-names"
 627                         ;;
 628                 2)
 629                         # DHCP address and RA only for management redirection
 630                         xappend "--dhcp-range=$nettag$dhcp6range,constructor:$ifname,$leasetime"
 631                         ;;
 632                 3)
 633                         # SLAAC only but dnsmasq attempts to link HOSTNAME, DHCPv4 MAC, and SLAAC
 634                         xappend "--dhcp-range=$nettag::,constructor:$ifname,ra-only,ra-names"
 635                         ;;
 636                 *)
 637                         # SLAAC and full DHCP
 638                         xappend "--dhcp-range=$nettag$dhcp6range,constructor:$ifname,slaac,ra-names,$leasetime"
 639                         ;;
 640                 esac
 641
 642                 if [ -n "$dns" ]; then
 643                         dnss=""
 644                         for d in $dns; do append dnss "[$d]" ","; done
 645                 else
 646                         dnss="[::]"
 647                 fi
 648
 649                 dhcp_option_append "option6:dns-server,$dnss" "$networkid"
 650         fi
 651
 652         dhcp_option_add "$cfg" "$networkid" 0
 653         dhcp_option_add "$cfg" "$networkid" 2
 654 }
 655
 656 dhcp_option_append() {
 657         local option="$1"
 658         local networkid="$2"
 659         local force="$3"
 660
 661         xappend "--dhcp-option${force:+-force}=${networkid:+$networkid,}$option"
 662 }
 663
 664 dhcp_option_add() {
 665         # NOTE: dnsmasq has explicit "option6:" prefix for DHCPv6 so no collisions
 666         local cfg="$1"
 667         local networkid="$2"
 668         local force="$3"
 669         local opt="dhcp_option"
 670
 671         [ "$force" = "0" ] && force=
 672         [ "$force" = "2" ] && opt="dhcp_option_force"
 673
 674         local list_len
 675         config_get list_len "$cfg" "${opt}_LENGTH"
 676
 677         if [ -n "$list_len" ]; then
 678                 config_list_foreach "$cfg" "$opt" dhcp_option_append "$networkid" "$force"
 679         else
 680                 config_get dhcp_option "$cfg" "$opt"
 681
 682                 [ -n "$dhcp_option" ] && echo "Warning: the 'option $opt' syntax is deprecated, use 'list $opt'" >&2
 683
 684                 local option
 685                 for option in $dhcp_option; do
 686                         dhcp_option_append "$option" "$networkid" "$force"
 687                 done
 688         fi
 689 }
 690
 691 dhcp_domain_add() {
 692         local cfg="$1"
 693         local ip name names record
 694
 695         config_get names "$cfg" name "$2"
 696         [ -n "$names" ] || return 0
 697
 698         config_get ip "$cfg" ip "$3"
 699         [ -n "$ip" ] || return 0
 700
 701         for name in $names; do
 702                 record="${record:+$record }$name"
 703         done
 704
 705         echo "$ip $record" >> $HOSTFILE_TMP
 706 }
 707
 708 dhcp_srv_add() {
 709         local cfg="$1"
 710
 711         config_get srv "$cfg" srv
 712         [ -n "$srv" ] || return 0
 713
 714         config_get target "$cfg" target
 715         [ -n "$target" ] || return 0
 716
 717         config_get port "$cfg" port
 718         [ -n "$port" ] || return 0
 719
 720         config_get class "$cfg" class
 721         config_get weight "$cfg" weight
 722
 723         local service="$srv,$target,$port${class:+,$class${weight:+,$weight}}"
 724
 725         xappend "--srv-host=$service"
 726 }
 727
 728 dhcp_mx_add() {
 729         local cfg="$1"
 730         local domain relay pref
 731
 732         config_get domain "$cfg" domain
 733         [ -n "$domain" ] || return 0
 734
 735         config_get relay "$cfg" relay
 736         [ -n "$relay" ] || return 0
 737
 738         config_get pref "$cfg" pref 0
 739
 740         local service="$domain,$relay,$pref"
 741
 742         xappend "--mx-host=$service"
 743 }
 744
 745 dhcp_cname_add() {
 746         local cfg="$1"
 747         local cname target
 748
 749         config_get cname "$cfg" cname
 750         [ -n "$cname" ] || return 0
 751
 752         config_get target "$cfg" target
 753         [ -n "$target" ] || return 0
 754
 755         xappend "--cname=${cname},${target}"
 756 }
 757
 758 dhcp_hostrecord_add() {
 759         local cfg="$1"
 760         local names addresses record val
 761
 762         config_get names "$cfg" name "$2"
 763         if [ -z "$names" ]; then
 764                 return 0
 765         fi
 766
 767         config_get addresses "$cfg" ip "$3"
 768         if [ -z "$addresses" ]; then
 769                 return 0
 770         fi
 771
 772         for val in $names $addresses; do
 773                 record="${record:+$record,}$val"
 774         done
 775
 776         xappend "--host-record=$record"
 777 }
 778
 779 dhcp_relay_add() {
 780         local cfg="$1"
 781         local local_addr server_addr interface
 782
 783         config_get local_addr "$cfg" local_addr
 784         [ -n "$local_addr" ] || return 0
 785
 786         config_get server_addr "$cfg" server_addr
 787         [ -n "$server_addr" ] || return 0
 788
 789         config_get interface "$cfg" interface
 790         if [ -z "$interface" ]; then
 791                 xappend "--dhcp-relay=$local_addr,$server_addr"
 792         else
 793                 network_get_device ifname "$interface" || return
 794                 xappend "--dhcp-relay=$local_addr,$server_addr,$ifname"
 795         fi
 796 }
 797
 798 dnsmasq_ipset_add() {
 799         local cfg="$1"
 800         local ipsets nftsets domains
 801
 802         add_ipset() {
 803                 ipsets="${ipsets:+$ipsets,}$1"
 804         }
 805
 806         add_nftset() {
 807                 local IFS=,
 808                 for set in $1; do
 809                         local fam="$family"
 810                         [ -n "$fam" ] || fam=$(echo "$set" | sed -nre \
 811                                 's#^.*[^0-9]([46])$|^.*[-_]([46])[-_].*$|^([46])[^0-9].*$#\1\2\3#p')
 812                         [ -n "$fam" ] || \
 813                                 fam=$(nft -t list set "$table_family" "$table" "$set" 2>&1 | sed -nre \
 814                                 's#^\t\ttype .*\bipv([46])_addr\b.*$#\1#p')
 815
 816                         [ -n "$fam" ] || \
 817                                 logger -t dnsmasq "Cannot infer address family from non-existent nftables set '$set'"
 818
 819                         nftsets="${nftsets:+$nftsets,}${fam:+$fam#}$table_family#$table#$set"
 820                 done
 821         }
 822
 823         add_domain() {
 824                 # leading '/' is expected
 825                 domains="$domains/$1"
 826         }
 827
 828         config_get table "$cfg" table 'fw4'
 829         config_get table_family "$cfg" table_family 'inet'
 830         if [ "$table_family" = "ip" ] ; then
 831                 family="4"
 832         elif [ "$table_family" = "ip6" ] ; then
 833                 family="6"
 834         else
 835                 config_get family "$cfg" family
 836         fi
 837
 838         config_list_foreach "$cfg" "name" add_ipset
 839         config_list_foreach "$cfg" "name" add_nftset
 840         config_list_foreach "$cfg" "domain" add_domain
 841
 842         if [ -z "$ipsets" ] || [ -z "$nftsets" ] || [ -z "$domains" ]; then
 843                 return 0
 844         fi
 845
 846         xappend "--ipset=$domains/$ipsets"
 847         xappend "--nftset=$domains/$nftsets"
 848 }
 849
 850 dnsmasq_start()
 851 {
 852         local cfg="$1"
 853         local disabled user_dhcpscript logfacility
 854         local resolvfile resolvdir localuse=0
 855
 856         config_get_bool disabled "$cfg" disabled 0
 857         [ "$disabled" -gt 0 ] && return 0
 858
 859         # reset list of DOMAINS, DNS servers and EXTRA mounts (for each dnsmasq instance)
 860         DNS_SERVERS=""
 861         DOMAIN=""
 862         EXTRA_MOUNT=""
 863         CONFIGFILE="${BASECONFIGFILE}.${cfg}"
 864         CONFIGFILE_TMP="${CONFIGFILE}.$$"
 865         HOSTFILE="${BASEHOSTFILE}.${cfg}"
 866         HOSTFILE_TMP="${HOSTFILE}.$$"
 867         HOSTFILE_DIR="$(dirname "$HOSTFILE")"
 868         BASEDHCPSTAMPFILE_CFG="${BASEDHCPSTAMPFILE}.${cfg}"
 869
 870         # before we can call xappend
 871         umask u=rwx,g=rx,o=rx
 872         mkdir -p /var/run/dnsmasq/
 873         mkdir -p $(dirname $CONFIGFILE)
 874         mkdir -p "$HOSTFILE_DIR"
 875         mkdir -p /var/lib/misc
 876         chown dnsmasq:dnsmasq /var/run/dnsmasq
 877
 878         echo "# auto-generated config file from /etc/config/dhcp" > $CONFIGFILE_TMP
 879         echo "# auto-generated config file from /etc/config/dhcp" > $HOSTFILE_TMP
 880
 881         local dnsmasqconffile="/etc/dnsmasq.${cfg}.conf"
 882         if [ ! -r "$dnsmasqconffile" ]; then
 883                 dnsmasqconffile=/etc/dnsmasq.conf
 884         fi
 885
 886         # if we did this last, we could override auto-generated config
 887         [ -f "${dnsmasqconffile}" ] && {
 888                 xappend "--conf-file=${dnsmasqconffile}"
 889         }
 890
 891         $PROG --version | grep -osqE "^Compile time options:.* DHCPv6( |$)" && DHCPv6CAPABLE=1 || DHCPv6CAPABLE=0
 892
 893
 894         if [ -x /usr/sbin/odhcpd ] && [ -x /etc/init.d/odhcpd ] ; then
 895                 local odhcpd_is_main odhcpd_is_enabled
 896                 config_get odhcpd_is_main odhcpd maindhcp 0
 897                 /etc/init.d/odhcpd enabled && odhcpd_is_enabled=1 || odhcpd_is_enabled=0
 898
 899
 900                 if [ "$odhcpd_is_enabled" -eq 0 ] && [ "$DHCPv6CAPABLE" -eq 1 ] ; then
 901                         # DHCP V4 and V6 in DNSMASQ
 902                         DNSMASQ_DHCP_VER=6
 903                 elif [ "$odhcpd_is_main" -gt 0 ] ; then
 904                         # ODHCPD is doing it all
 905                         DNSMASQ_DHCP_VER=0
 906                 else
 907                         # You have ODHCPD but use DNSMASQ for DHCPV4
 908                         DNSMASQ_DHCP_VER=4
 909                 fi
 910
 911         elif [ "$DHCPv6CAPABLE" -eq 1 ] ; then
 912                 # DHCP V4 and V6 in DNSMASQ
 913                 DNSMASQ_DHCP_VER=6
 914         else
 915                 DNSMASQ_DHCP_VER=4
 916         fi
 917
 918         # Allow DHCP/DHCPv6 to be handled by ISC DHCPD
 919         if [ -x /usr/sbin/dhcpd ] ; then
 920                 if [ -x /etc/init.d/dhcpd ] ; then
 921                         /etc/init.d/dhcpd enabled && DNSMASQ_DHCP_VER=0
 922                 fi
 923                 if [ -x /etc/init.d/dhcpd6 ] && [ "$DNSMASQ_DHCP_VER" -gt 0 ] ; then
 924                         /etc/init.d/dhcpd6 enabled && DNSMASQ_DHCP_VER=4
 925                 fi
 926         fi
 927
 928         append_bool "$cfg" authoritative "--dhcp-authoritative"
 929         append_bool "$cfg" nodaemon "--no-daemon"
 930         append_bool "$cfg" domainneeded "--domain-needed"
 931         append_bool "$cfg" filterwin2k "--filterwin2k"
 932         append_bool "$cfg" nohosts "--no-hosts"
 933         append_bool "$cfg" nonegcache "--no-negcache"
 934         append_bool "$cfg" strictorder "--strict-order"
 935         append_bool "$cfg" logqueries "--log-queries=extra"
 936         append_bool "$cfg" noresolv "--no-resolv"
 937         append_bool "$cfg" localise_queries "--localise-queries"
 938         append_bool "$cfg" readethers "--read-ethers"
 939
 940         local instance_name="dnsmasq.$cfg"
 941         if [ "$cfg" = "$DEFAULT_INSTANCE" ]; then
 942                 instance_name="dnsmasq"
 943         fi
 944         config_get_bool dbus "$cfg" "dbus" 0
 945         [ $dbus -gt 0 ] && xappend "--enable-dbus=uk.org.thekelleys.$instance_name"
 946         config_get_bool ubus "$cfg" "ubus" 1
 947         [ $ubus -gt 0 ] && xappend "--enable-ubus=$instance_name"
 948
 949         append_bool "$cfg" expandhosts "--expand-hosts"
 950         config_get tftp_root "$cfg" "tftp_root"
 951         [ -n "$tftp_root" ] && mkdir -p "$tftp_root" && append_bool "$cfg" enable_tftp "--enable-tftp"
 952         append_bool "$cfg" tftp_no_fail "--tftp-no-fail"
 953         append_bool "$cfg" nonwildcard "--bind-dynamic" 1
 954         append_bool "$cfg" fqdn "--dhcp-fqdn"
 955         append_bool "$cfg" proxydnssec "--proxy-dnssec"
 956         append_bool "$cfg" localservice "--local-service"
 957         append_bool "$cfg" logdhcp "--log-dhcp"
 958         append_bool "$cfg" quietdhcp "--quiet-dhcp"
 959         append_bool "$cfg" sequential_ip "--dhcp-sequential-ip"
 960         append_bool "$cfg" allservers "--all-servers"
 961         append_bool "$cfg" noping "--no-ping"
 962         append_bool "$cfg" rapidcommit "--dhcp-rapid-commit"
 963         append_bool "$cfg" scriptarp "--script-arp"
 964
 965         append_bool "$cfg" filter_aaaa "--filter-AAAA"
 966         append_bool "$cfg" filter_a "--filter-A"
 967
 968         append_parm "$cfg" logfacility "--log-facility"
 969         config_get logfacility "$cfg" "logfacility"
 970         append_parm "$cfg" cachesize "--cache-size"
 971         append_parm "$cfg" dnsforwardmax "--dns-forward-max"
 972         append_parm "$cfg" port "--port"
 973         append_parm "$cfg" ednspacket_max "--edns-packet-max"
 974         append_parm "$cfg" dhcpleasemax "--dhcp-lease-max"
 975         append_parm "$cfg" "queryport" "--query-port"
 976         append_parm "$cfg" "minport" "--min-port"
 977         append_parm "$cfg" "maxport" "--max-port"
 978         append_parm "$cfg" "domain" "--domain"
 979         append_parm "$cfg" "local" "--local"
 980         config_list_foreach "$cfg" "listen_address" append_listenaddress
 981         config_list_foreach "$cfg" "server" append_server
 982         config_list_foreach "$cfg" "rev_server" append_rev_server
 983         config_list_foreach "$cfg" "address" append_address
 984
 985         local connmark_allowlist_enable
 986         config_get connmark_allowlist_enable "$cfg" connmark_allowlist_enable 0
 987         [ "$connmark_allowlist_enable" -gt 0 ] && {
 988                 append_parm "$cfg" "connmark_allowlist_enable" "--connmark-allowlist-enable"
 989                 config_list_foreach "$cfg" "connmark_allowlist" append_connmark_allowlist
 990         }
 991
 992         [ -n "$BOOT" ] || {
 993                 config_list_foreach "$cfg" "interface" append_interface
 994                 config_list_foreach "$cfg" "notinterface" append_notinterface
 995         }
 996         config_get_bool ignore_hosts_dir "$cfg" ignore_hosts_dir 0
 997         if [ "$ignore_hosts_dir" = "1" ]; then
 998                 xappend "--addn-hosts=$HOSTFILE"
 999                 append EXTRA_MOUNT "$HOSTFILE"
1000         else
1001                 xappend "--addn-hosts=$HOSTFILE_DIR"
1002                 append EXTRA_MOUNT "$HOSTFILE_DIR"
1003         fi
1004         config_list_foreach "$cfg" "addnhosts" append_addnhosts
1005         config_list_foreach "$cfg" "bogusnxdomain" append_bogusnxdomain
1006         append_parm "$cfg" "leasefile" "--dhcp-leasefile" "/tmp/dhcp.leases"
1007
1008         local serversfile
1009         config_get serversfile "$cfg" "serversfile"
1010         [ -n "$serversfile" ] && {
1011                 xappend "--servers-file=$serversfile"
1012                 append EXTRA_MOUNT "$serversfile"
1013         }
1014
1015         append_parm "$cfg" "tftp_root" "--tftp-root"
1016         append_parm "$cfg" "dhcp_boot" "--dhcp-boot"
1017         append_parm "$cfg" "local_ttl" "--local-ttl"
1018         append_parm "$cfg" "max_ttl" "--max-ttl"
1019         append_parm "$cfg" "min_cache_ttl" "--min-cache-ttl"
1020         append_parm "$cfg" "max_cache_ttl" "--max-cache-ttl"
1021         append_parm "$cfg" "pxe_prompt" "--pxe-prompt"
1022         append_parm "$cfg" "tftp_unique_root" "--tftp-unique-root"
1023         config_list_foreach "$cfg" "pxe_service" append_pxe_service
1024         config_get DOMAIN "$cfg" domain
1025
1026         config_get_bool ADD_LOCAL_DOMAIN "$cfg" add_local_domain 1
1027         config_get_bool ADD_LOCAL_HOSTNAME "$cfg" add_local_hostname 1
1028         config_get ADD_LOCAL_FQDN "$cfg" add_local_fqdn ""
1029         config_get ADD_WAN_FQDN "$cfg" add_wan_fqdn 0
1030
1031         if [ -z "$ADD_LOCAL_FQDN" ] ; then
1032                 # maintain support for previous UCI
1033                 ADD_LOCAL_FQDN="$ADD_LOCAL_HOSTNAME"
1034         fi
1035
1036         config_get user_dhcpscript $cfg dhcpscript
1037         if has_handler || [ -n "$user_dhcpscript" ]; then
1038                 xappend "--dhcp-script=$DHCPSCRIPT"
1039                 xappend "--script-arp"
1040         fi
1041
1042         config_get leasefile $cfg leasefile "/tmp/dhcp.leases"
1043         [ -n "$leasefile" ] && [ ! -e "$leasefile" ] && touch "$leasefile"
1044         config_get_bool cachelocal "$cfg" cachelocal 1
1045
1046         config_get_bool noresolv "$cfg" noresolv 0
1047         if [ "$noresolv" != "1" ]; then
1048                 config_get resolvfile "$cfg" resolvfile /tmp/resolv.conf.d/resolv.conf.auto
1049                 [ -n "$resolvfile" ] && [ ! -e "$resolvfile" ] && touch "$resolvfile"
1050                 xappend "--resolv-file=$resolvfile"
1051                 [ "$resolvfile" = "/tmp/resolv.conf.d/resolv.conf.auto" ] && localuse=1
1052                 resolvdir="$(dirname "$resolvfile")"
1053         fi
1054         config_get_bool localuse "$cfg" localuse "$localuse"
1055
1056         config_get hostsfile "$cfg" dhcphostsfile
1057         [ -e "$hostsfile" ] && xappend "--dhcp-hostsfile=$hostsfile"
1058
1059         local rebind
1060         config_get_bool rebind "$cfg" rebind_protection 1
1061         [ $rebind -gt 0 ] && {
1062                 log_once \
1063                         "DNS rebinding protection is active," \
1064                         "will discard upstream RFC1918 responses!"
1065                 xappend "--stop-dns-rebind"
1066
1067                 local rebind_localhost
1068                 config_get_bool rebind_localhost "$cfg" rebind_localhost 0
1069                 [ $rebind_localhost -gt 0 ] && {
1070                         log_once "Allowing 127.0.0.0/8 responses"
1071                         xappend "--rebind-localhost-ok"
1072                 }
1073
1074                 append_rebind_domain() {
1075                         log_once "Allowing RFC1918 responses for domain $1"
1076                         xappend "--rebind-domain-ok=$1"
1077                 }
1078
1079                 config_list_foreach "$cfg" rebind_domain append_rebind_domain
1080         }
1081
1082         config_get_bool dnssec "$cfg" dnssec 0
1083         [ "$dnssec" -gt 0 ] && {
1084                 xappend "--conf-file=$TRUSTANCHORSFILE"
1085                 xappend "--dnssec"
1086                 [ -x /etc/init.d/sysntpd ] && {
1087                         if /etc/init.d/sysntpd enabled || [ "$(uci_get system.ntp.enabled)" = "1" ] ; then
1088                                 [ -f "$TIMEVALIDFILE" ] || xappend "--dnssec-no-timecheck"
1089                         fi
1090                 }
1091                 config_get_bool dnsseccheckunsigned "$cfg" dnsseccheckunsigned 1
1092                 [ "$dnsseccheckunsigned" -eq 0 ] && xappend "--dnssec-check-unsigned=no"
1093         }
1094
1095         config_get addmac "$cfg" addmac 0
1096         [ "$addmac" != "0" ] && {
1097                 [ "$addmac" = "1" ] && addmac=
1098                 xappend "--add-mac${addmac:+="$addmac"}"
1099         }
1100
1101         dhcp_option_add "$cfg" "" 0
1102         dhcp_option_add "$cfg" "" 2
1103
1104         xappend "--dhcp-broadcast=tag:needs-broadcast"
1105
1106
1107         config_get dnsmasqconfdir "$cfg" confdir "/tmp/dnsmasq.d"
1108         xappend "--conf-dir=$dnsmasqconfdir"
1109         dnsmasqconfdir="${dnsmasqconfdir%%,*}"
1110         [ ! -d "$dnsmasqconfdir" ] && mkdir -p $dnsmasqconfdir
1111         xappend "--user=dnsmasq"
1112         xappend "--group=dnsmasq"
1113         echo >> $CONFIGFILE_TMP
1114
1115         config_get_bool enable_tftp "$cfg" enable_tftp 0
1116         [ "$enable_tftp" -gt 0 ] && {
1117                 config_get tftp_root "$cfg" tftp_root
1118                 append EXTRA_MOUNT $tftp_root
1119         }
1120
1121         config_foreach filter_dnsmasq host dhcp_host_add "$cfg"
1122         echo >> $CONFIGFILE_TMP
1123
1124         config_get_bool dhcpbogushostname "$cfg" dhcpbogushostname 1
1125         [ "$dhcpbogushostname" -gt 0 ] && {
1126                 xappend "--dhcp-ignore-names=tag:dhcp_bogus_hostname"
1127                 [ -r "$DHCPBOGUSHOSTNAMEFILE" ] && xappend "--conf-file=$DHCPBOGUSHOSTNAMEFILE"
1128         }
1129
1130         config_foreach filter_dnsmasq boot dhcp_boot_add "$cfg"
1131         config_foreach filter_dnsmasq mac dhcp_mac_add "$cfg"
1132         config_foreach filter_dnsmasq tag dhcp_tag_add "$cfg"
1133         config_foreach filter_dnsmasq vendorclass dhcp_vendorclass_add "$cfg"
1134         config_foreach filter_dnsmasq userclass dhcp_userclass_add "$cfg"
1135         config_foreach filter_dnsmasq circuitid dhcp_circuitid_add "$cfg"
1136         config_foreach filter_dnsmasq remoteid dhcp_remoteid_add "$cfg"
1137         config_foreach filter_dnsmasq subscrid dhcp_subscrid_add "$cfg"
1138         config_foreach filter_dnsmasq match dhcp_match_add "$cfg"
1139         config_foreach filter_dnsmasq domain dhcp_domain_add "$cfg"
1140         config_foreach filter_dnsmasq hostrecord dhcp_hostrecord_add "$cfg"
1141         [ -n "$BOOT" ] || config_foreach filter_dnsmasq relay dhcp_relay_add "$cfg"
1142
1143         echo >> $CONFIGFILE_TMP
1144         config_foreach filter_dnsmasq srvhost dhcp_srv_add "$cfg"
1145         config_foreach filter_dnsmasq mxhost dhcp_mx_add "$cfg"
1146         echo >> $CONFIGFILE_TMP
1147
1148         config_get_bool boguspriv "$cfg" boguspriv 1
1149         [ "$boguspriv" -gt 0 ] && {
1150                 xappend "--bogus-priv"
1151                 [ -r "$RFC6761FILE" ] && xappend "--conf-file=$RFC6761FILE"
1152         }
1153
1154         if [ "$DNSMASQ_DHCP_VER" -gt 4 ] ; then
1155                 # Enable RA feature for when/if it is constructed,
1156                 # and RA is selected per interface pool (RA, DHCP, or both),
1157                 # but no one (should) want RA broadcast in syslog
1158                 [ -n "$BOOT" ] || config_foreach filter_dnsmasq dhcp dhcp_add "$cfg"
1159                 xappend "--enable-ra"
1160                 xappend "--quiet-ra"
1161                 append_bool "$cfg" quietdhcp "--quiet-dhcp6"
1162
1163         elif [ "$DNSMASQ_DHCP_VER" -gt 0 ] ; then
1164                 [ -n "$BOOT" ] || config_foreach filter_dnsmasq dhcp dhcp_add "$cfg"
1165         fi
1166
1167
1168         echo >> $CONFIGFILE_TMP
1169         config_foreach filter_dnsmasq cname dhcp_cname_add "$cfg"
1170         echo >> $CONFIGFILE_TMP
1171
1172         echo >> $CONFIGFILE_TMP
1173         config_foreach filter_dnsmasq ipset dnsmasq_ipset_add "$cfg"
1174         echo >> $CONFIGFILE_TMP
1175
1176         mv -f $CONFIGFILE_TMP $CONFIGFILE
1177         mv -f $HOSTFILE_TMP $HOSTFILE
1178
1179         [ "$localuse" -gt 0 ] && {
1180                 rm -f /tmp/resolv.conf
1181                 [ $ADD_LOCAL_DOMAIN -eq 1 ] && [ -n "$DOMAIN" ] && {
1182                         echo "search $DOMAIN" >> /tmp/resolv.conf
1183                 }
1184                 DNS_SERVERS="$DNS_SERVERS 127.0.0.1"
1185                 [ -e /proc/sys/net/ipv6 ] && DNS_SERVERS="$DNS_SERVERS ::1"
1186                 for DNS_SERVER in $DNS_SERVERS ; do
1187                         echo "nameserver $DNS_SERVER" >> /tmp/resolv.conf
1188                 done
1189         }
1190
1191         config_list_foreach "$cfg" addnmount append_extramount
1192
1193         procd_open_instance $cfg
1194         procd_set_param command $PROG -C $CONFIGFILE -k -x /var/run/dnsmasq/dnsmasq."${cfg}".pid
1195         procd_set_param file $CONFIGFILE
1196         [ -n "$user_dhcpscript" ] && procd_set_param env USER_DHCPSCRIPT="$user_dhcpscript"
1197         procd_set_param respawn
1198
1199         local instance_ifc instance_netdev
1200         config_get instance_ifc "$cfg" interface
1201         [ -n "$instance_ifc" ] && network_get_device instance_netdev "$instance_ifc" &&
1202                 [ -n "$instance_netdev" ] && procd_set_param netdev $instance_netdev
1203
1204         procd_add_jail dnsmasq ubus log
1205         procd_add_jail_mount $CONFIGFILE $DHCPBOGUSHOSTNAMEFILE $DHCPSCRIPT $DHCPSCRIPT_DEPENDS
1206         procd_add_jail_mount $EXTRA_MOUNT $RFC6761FILE $TRUSTANCHORSFILE
1207         procd_add_jail_mount $dnsmasqconffile $dnsmasqconfdir $resolvdir $user_dhcpscript
1208         procd_add_jail_mount /etc/passwd /etc/group /etc/TZ /etc/hosts /etc/ethers
1209         procd_add_jail_mount_rw /var/run/dnsmasq/ $leasefile
1210         case "$logfacility" in */*)
1211                 [ ! -e "$logfacility" ] && touch "$logfacility"
1212                 procd_add_jail_mount_rw "$logfacility"
1213         esac
1214         [ -e "$hostsfile" ] && procd_add_jail_mount $hostsfile
1215
1216         procd_close_instance
1217 }
1218
1219 dnsmasq_stop()
1220 {
1221         local cfg="$1"
1222         local noresolv resolvfile localuse=0
1223
1224         config_get_bool noresolv "$cfg" noresolv 0
1225         config_get resolvfile "$cfg" "resolvfile"
1226
1227         [ "$noresolv" = 0 ] && [ "$resolvfile" = "/tmp/resolv.conf.d/resolv.conf.auto" ] && localuse=1
1228         config_get_bool localuse "$cfg" localuse "$localuse"
1229         [ "$localuse" -gt 0 ] && ln -sf "/tmp/resolv.conf.d/resolv.conf.auto" /tmp/resolv.conf
1230
1231         rm -f ${BASEDHCPSTAMPFILE}.${cfg}.*.dhcp
1232 }
1233
1234 add_interface_trigger()
1235 {
1236         local interface ignore
1237
1238         config_get interface "$1" interface
1239         config_get_bool ignore "$1" ignore 0
1240
1241         [ -n "$interface" ] && [ $ignore -eq 0 ] && procd_add_interface_trigger "interface.*" "$interface" /etc/init.d/dnsmasq reload
1242 }
1243
1244 service_triggers()
1245 {
1246         procd_add_reload_trigger "dhcp" "system"
1247
1248         config_load dhcp
1249         config_foreach add_interface_trigger dhcp
1250         config_foreach add_interface_trigger relay
1251 }
1252
1253 boot()
1254 {
1255         BOOT=1
1256         start "$@"
1257 }
1258
1259 start_service() {
1260         local instance="$1"
1261         local instance_found=0
1262         local first_instance=""
1263
1264         . /lib/functions/network.sh
1265
1266         config_cb() {
1267                 local type="$1"
1268                 local name="$2"
1269                 if [ "$type" = "dnsmasq" ]; then
1270                         if [ -n "$instance" ] && [ "$instance" = "$name" ]; then
1271                                 instance_found=1
1272                         fi
1273                         if [ -z "$DEFAULT_INSTANCE" ]; then
1274                                 local disabled
1275                                 config_get_bool disabled "$name" disabled 0
1276                                 if [ "$disabled" -eq 0 ]; then
1277                                         # First enabled section will be assigned default instance name.
1278                                         # Unnamed sections get precedence over named sections.
1279                                         if expr "$cfg" : 'cfg[0-9a-f]*$' >/dev/null = "9"; then # See uci_fixup_section.
1280                                                 DEFAULT_INSTANCE="$name" # Unnamed config section.
1281                                         elif [ -z "$first_instance" ]; then
1282                                                 first_instance="$name"
1283                                         fi
1284                                 fi
1285                         fi
1286                 fi
1287         }
1288
1289         DEFAULT_INSTANCE=""
1290         config_load dhcp
1291         if [ -z "$DEFAULT_INSTANCE" ]; then
1292                 DEFAULT_INSTANCE="$first_instance" # No unnamed config section was found.
1293         fi
1294
1295         if [ -n "$instance" ]; then
1296                 [ "$instance_found" -gt 0 ] || return
1297                 dnsmasq_start "$instance"
1298         else
1299                 config_foreach dnsmasq_start dnsmasq
1300         fi
1301 }
1302
1303 reload_service() {
1304         rc_procd start_service "$@"
1305         procd_send_signal dnsmasq "$@"
1306 }
1307
1308 stop_service() {
1309         local instance="$1"
1310         local instance_found=0
1311
1312         config_cb() {
1313                 local type="$1"
1314                 local name="$2"
1315                 if [ "$type" = "dnsmasq" ]; then
1316                         if [ -n "$instance" ] && [ "$instance" = "$name" ]; then
1317                                 instance_found=1
1318                         fi
1319                 fi
1320         }
1321
1322         config_load dhcp
1323
1324         if [ -n "$instance" ]; then
1325                 [ "$instance_found" -gt 0 ] || return
1326                 dnsmasq_stop "$instance"
1327         else
1328                 config_foreach dnsmasq_stop dnsmasq
1329         fi
1330 }