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 BASETIMESTAMPFILE="/etc/dnsmasq.time"
  17 TRUSTANCHORSFILE="/usr/share/dnsmasq/trust-anchors.conf"
  18 TIMEVALIDFILE="/var/state/dnsmasqsec"
  19 BASEDHCPSTAMPFILE="/var/run/dnsmasq"
  20 RFC6761FILE="/usr/share/dnsmasq/rfc6761.conf"
  21 DHCPSCRIPT="/usr/lib/dnsmasq/dhcp-script.sh"
  22
  23 DNSMASQ_DHCP_VER=4
  24
  25 xappend() {
  26         local value="$1"
  27
  28         echo "${value#--}" >> $CONFIGFILE_TMP
  29 }
  30
  31 hex_to_hostid() {
  32         local var="$1"
  33         local hex="${2#0x}" # strip optional "0x" prefix
  34
  35         if [ -n "${hex//[0-9a-fA-F]/}" ]; then
  36                 # is invalid hex literal
  37                 return 1
  38         fi
  39
  40         # convert into host id
  41         export "$var=$(
  42                 printf "%0x:%0x" \
  43                 $(((0x$hex >> 16) % 65536)) \
  44                 $(( 0x$hex        % 65536))
  45                 )"
  46
  47         return 0
  48 }
  49
  50 dhcp_calc() {
  51         local ip="$1"
  52         local res=0
  53
  54         while [ -n "$ip" ]; do
  55                 part="${ip%%.*}"
  56                 res="$(($res * 256))"
  57                 res="$(($res + $part))"
  58                 [ "${ip%.*}" != "$ip" ] && ip="${ip#*.}" || ip=
  59         done
  60         echo "$res"
  61 }
  62
  63 dhcp_check() {
  64         local ifname="$1"
  65         local stamp="${BASEDHCPSTAMPFILE_CFG}.${ifname}.dhcp"
  66         local rv=0
  67
  68         [ -s "$stamp" ] && return $(cat "$stamp")
  69
  70         # If there's no carrier yet, skip this interface.
  71         # The init script will be called again once the link is up
  72         case "$(devstatus "$ifname" | jsonfilter -e @.carrier)" in
  73                 false) return 1;;
  74         esac
  75
  76         udhcpc -n -q -s /bin/true -t 1 -i "$ifname" >&- && rv=1 || rv=0
  77
  78         [ $rv -eq 1 ] && \
  79                 logger -t dnsmasq \
  80                         "found already running DHCP-server on interface '$ifname'" \
  81                         "refusing to start, use 'option force 1' to override"
  82
  83         echo $rv > "$stamp"
  84         return $rv
  85 }
  86
  87 log_once() {
  88         pidof dnsmasq >/dev/null || \
  89                 logger -t dnsmasq "$@"
  90 }
  91
  92 append_bool() {
  93         local section="$1"
  94         local option="$2"
  95         local value="$3"
  96         local _loctmp
  97         config_get_bool _loctmp "$section" "$option" 0
  98         [ $_loctmp -gt 0 ] && xappend "$value"
  99 }
 100
 101 append_parm() {
 102         local section="$1"
 103         local option="$2"
 104         local switch="$3"
 105         local default="$4"
 106         local _loctmp
 107         config_get _loctmp "$section" "$option" "$default"
 108         [ -z "$_loctmp" ] && return 0
 109         xappend "$switch=$_loctmp"
 110 }
 111
 112 append_server() {
 113         xappend "--server=$1"
 114 }
 115
 116 append_address() {
 117         xappend "--address=$1"
 118 }
 119
 120 append_ipset() {
 121         xappend "--ipset=$1"
 122 }
 123
 124 append_interface() {
 125         network_get_device ifname "$1" || return
 126         xappend "--interface=$ifname"
 127 }
 128
 129 append_notinterface() {
 130         network_get_device ifname "$1" || return
 131         xappend "--except-interface=$ifname"
 132 }
 133
 134 append_addnhosts() {
 135         xappend "--addn-hosts=$1"
 136 }
 137
 138 append_bogusnxdomain() {
 139         xappend "--bogus-nxdomain=$1"
 140 }
 141
 142 append_pxe_service() {
 143         xappend "--pxe-service=$1"
 144 }
 145
 146 append_interface_name() {
 147         xappend "--interface-name=$1,$2"
 148 }
 149
 150 filter_dnsmasq() {
 151         local cfg="$1" func="$2" match_cfg="$3" found_cfg
 152
 153         # use entry when no instance entry set, or if it matches
 154         config_get found_cfg "$cfg" "instance"
 155         if [ -z "$found_cfg" -o "$found_cfg" = "$match_cfg" ]; then
 156                 $func $cfg
 157         fi
 158 }
 159
 160 dhcp_subscrid_add() {
 161         local cfg="$1"
 162
 163         config_get networkid "$cfg" networkid
 164         [ -n "$networkid" ] || return 0
 165
 166         config_get subscriberid "$cfg" subscriberid
 167         [ -n "$subscriberid" ] || return 0
 168
 169         xappend "--dhcp-subscrid=$networkid,$subscriberid"
 170
 171         config_get_bool force "$cfg" force 0
 172
 173         dhcp_option_add "$cfg" "$networkid" "$force"
 174 }
 175
 176 dhcp_remoteid_add() {
 177         local cfg="$1"
 178
 179         config_get networkid "$cfg" networkid
 180         [ -n "$networkid" ] || return 0
 181
 182         config_get remoteid "$cfg" remoteid
 183         [ -n "$remoteid" ] || return 0
 184
 185         xappend "--dhcp-remoteid=$networkid,$remoteid"
 186
 187         config_get_bool force "$cfg" force 0
 188
 189         dhcp_option_add "$cfg" "$networkid" "$force"
 190 }
 191
 192 dhcp_circuitid_add() {
 193         # TODO: DHCPV6 does not have circuitid; catch "option6:"
 194         local cfg="$1"
 195
 196         config_get networkid "$cfg" networkid
 197         [ -n "$networkid" ] || return 0
 198
 199         config_get circuitid "$cfg" circuitid
 200         [ -n "$circuitid" ] || return 0
 201
 202         xappend "--dhcp-circuitid=$networkid,$circuitid"
 203
 204         config_get_bool force "$cfg" force 0
 205
 206         dhcp_option_add "$cfg" "$networkid" "$force"
 207 }
 208
 209 dhcp_userclass_add() {
 210         local cfg="$1"
 211
 212         config_get networkid "$cfg" networkid
 213         [ -n "$networkid" ] || return 0
 214
 215         config_get userclass "$cfg" userclass
 216         [ -n "$userclass" ] || return 0
 217
 218         xappend "--dhcp-userclass=$networkid,$userclass"
 219
 220         config_get_bool force "$cfg" force 0
 221
 222         dhcp_option_add "$cfg" "$networkid" "$force"
 223 }
 224
 225 dhcp_vendorclass_add() {
 226         # TODO: DHCPV6 vendor class has stricter definitions; catch? fixup?
 227         local cfg="$1"
 228
 229         config_get networkid "$cfg" networkid
 230         [ -n "$networkid" ] || return 0
 231
 232         config_get vendorclass "$cfg" vendorclass
 233         [ -n "$vendorclass" ] || return 0
 234
 235         xappend "--dhcp-vendorclass=$networkid,$vendorclass"
 236
 237         config_get_bool force "$cfg" force 0
 238
 239         dhcp_option_add "$cfg" "$networkid" "$force"
 240 }
 241
 242 dhcp_match_add() {
 243         local cfg="$1"
 244
 245         config_get networkid "$cfg" networkid
 246         [ -n "$networkid" ] || return 0
 247
 248         config_get match "$cfg" match
 249         [ -n "$match" ] || return 0
 250
 251         xappend "--dhcp-match=$networkid,$match"
 252
 253         config_get_bool force "$cfg" force 0
 254
 255         dhcp_option_add "$cfg" "$networkid" "$force"
 256 }
 257
 258 dhcp_host_add() {
 259         local cfg="$1"
 260         local hosttag nametime addrs duids
 261
 262         config_get_bool force "$cfg" force 0
 263
 264         config_get networkid "$cfg" networkid
 265         [ -n "$networkid" ] && dhcp_option_add "$cfg" "$networkid" "$force"
 266
 267         config_get_bool enable "$cfg" enable 1
 268         [ "$enable" = "0" ] && return 0
 269
 270         config_get name "$cfg" name
 271         config_get ip "$cfg" ip
 272         config_get hostid "$cfg" hostid
 273
 274         [ -n "$ip" -o -n "$name" -o -n "$hostid" ] || return 0
 275
 276         config_get_bool dns "$cfg" dns 0
 277         [ "$dns" = "1" -a -n "$ip" -a -n "$name" ] && {
 278                 echo "$ip $name${DOMAIN:+.$DOMAIN}" >> $HOSTFILE
 279         }
 280
 281         config_get mac "$cfg" mac
 282         config_get duid "$cfg" duid
 283         config_get tag "$cfg" tag
 284
 285         if [ -n "$mac" ]; then
 286                 # --dhcp-host=00:20:e0:3b:13:af,192.168.0.199,lap
 287                 # many MAC are possible to track a laptop ON/OFF dock
 288                 macs=""
 289                 for m in $mac; do append macs "$m" ","; done
 290         fi
 291
 292         if [ $DNSMASQ_DHCP_VER -eq 6 -a -n "$duid" ]; then
 293                 # --dhcp-host=id:00:03:00:01:12:00:00:01:02:03,[::beef],lap
 294                 # one (virtual) machine gets one DUID per RFC3315
 295                 duids="id:${duid// */}"
 296         fi
 297
 298         if [ -z "$macs" -a -z "$duids" ]; then
 299                 # --dhcp-host=lap,192.168.0.199,[::beef]
 300                 [ -n "$name" ] || return 0
 301                 macs="$name"
 302                 name=""
 303         fi
 304
 305         if [ -n "$hostid" ]; then
 306                         hex_to_hostid hostid "$hostid"
 307         fi
 308
 309         config_get_bool broadcast "$cfg" broadcast 0
 310         config_get leasetime "$cfg" leasetime
 311
 312         [ "$broadcast" = "0" ] && broadcast= || broadcast=",set:needs-broadcast"
 313
 314         hosttag="${networkid:+,set:${networkid}}${tag:+,set:${tag}}$broadcast"
 315         nametime="${name:+,$name}${leasetime:+,$leasetime}"
 316
 317         if [ $DNSMASQ_DHCP_VER -eq 6 ]; then
 318                 addrs="${ip:+,$ip}${hostid:+,[::$hostid]}"
 319                 xappend "--dhcp-host=$macs${duids:+,$duids}$hosttag$addrs$nametime"
 320         else
 321                 xappend "--dhcp-host=$macs$hosttag${ip:+,$ip}$nametime"
 322         fi
 323 }
 324
 325 dhcp_this_host_add() {
 326         local net="$1"
 327         local ifname="$2"
 328         local mode="$3"
 329         local routerstub routername ifdashname
 330         local lanaddr lanaddr6 lanaddrs6 ulaprefix
 331
 332         if [ "$mode" -gt 0 ] ; then
 333                 ifdashname="${ifname//./-}"
 334                 routerstub="$( md5sum /etc/os-release )"
 335                 routerstub="router-${routerstub// */}"
 336                 routername="$( uci_get system @system[0] hostname $routerstub )"
 337
 338                 if [ "$mode" -gt 1 ] ; then
 339                         if [ "$mode" -gt 2 ] ; then
 340                                 if [ "$mode" -gt 3 ] ; then
 341                                         append_interface_name "$ifdashname.$routername.$DOMAIN" "$ifname"
 342                                 fi
 343
 344                                 append_interface_name "$routername.$DOMAIN" "$ifname"
 345                         fi
 346
 347                         # All IP addresses discovered by dnsmasq will be labeled (except fe80::)
 348                         append_interface_name "$routername" "$ifname"
 349
 350                 else
 351                         # This uses a static host file entry for only limited addresses.
 352                         # Use dnsmasq option "--expandhosts" to enable FQDN on host files.
 353                         ulaprefix="$(uci_get network @globals[0] ula_prefix)"
 354                         network_get_ipaddr lanaddr "$net"
 355                         network_get_ipaddrs6 lanaddrs6 "$net"
 356
 357                         if [ -n "$lanaddr" ] ; then
 358                                 dhcp_domain_add "" "$routername" "$lanaddr"
 359                         fi
 360
 361                         if [ -n "$ulaprefix" -a -n "$lanaddrs6" ] ; then
 362                                 for lanaddr6 in $lanaddrs6 ; do
 363                                         case "$lanaddr6" in
 364                                         "${ulaprefix%%:/*}"*)
 365                                                         dhcp_domain_add "" "$routername" "$lanaddr6"
 366                                                         ;;
 367                                         esac
 368                                 done
 369                         fi
 370                 fi
 371         fi
 372 }
 373
 374 dhcp_tag_add() {
 375         # NOTE: dnsmasq has explicit "option6:" prefix for DHCPv6 so no collisions
 376         local cfg="$1"
 377
 378         tag="$cfg"
 379
 380         [ -n "$tag" ] || return 0
 381
 382         config_get_bool force "$cfg" force 0
 383         [ "$force" = "0" ] && force=
 384
 385         config_get option "$cfg" dhcp_option
 386         for o in $option; do
 387                 xappend "--dhcp-option${force:+-force}=tag:$tag,$o"
 388         done
 389 }
 390
 391 dhcp_mac_add() {
 392         local cfg="$1"
 393
 394         config_get networkid "$cfg" networkid
 395         [ -n "$networkid" ] || return 0
 396
 397         config_get mac "$cfg" mac
 398         [ -n "$mac" ] || return 0
 399
 400         xappend "--dhcp-mac=$networkid,$mac"
 401
 402         dhcp_option_add "$cfg" "$networkid"
 403 }
 404
 405 dhcp_boot_add() {
 406         # TODO: BOOTURL is different between DHCPv4 and DHCPv6
 407         local cfg="$1"
 408
 409         config_get networkid "$cfg" networkid
 410
 411         config_get filename "$cfg" filename
 412         [ -n "$filename" ] || return 0
 413
 414         config_get servername "$cfg" servername
 415         config_get serveraddress "$cfg" serveraddress
 416
 417         [ -n "$serveraddress" -a ! -n "$servername" ] && return 0
 418
 419         xappend "--dhcp-boot=${networkid:+net:$networkid,}${filename}${servername:+,$servername}${serveraddress:+,$serveraddress}"
 420
 421         config_get_bool force "$cfg" force 0
 422
 423         dhcp_option_add "$cfg" "$networkid" "$force"
 424 }
 425
 426
 427 dhcp_add() {
 428         local cfg="$1"
 429         local dhcp6range="::"
 430         local nettag
 431
 432         config_get net "$cfg" interface
 433         [ -n "$net" ] || return 0
 434
 435         config_get networkid "$cfg" networkid
 436         [ -n "$networkid" ] || networkid="$net"
 437
 438         network_get_subnet subnet "$net" || return 0
 439         network_get_device ifname "$net" || return 0
 440         network_get_protocol proto "$net" || return 0
 441
 442         [ "$cachelocal" = "0" ] && network_get_dnsserver dnsserver "$net" && {
 443                 DNS_SERVERS="$DNS_SERVERS $dnsserver"
 444         }
 445
 446         append_bool "$cfg" ignore "--no-dhcp-interface=$ifname" && {
 447                 # Many ISP do not have useful names for DHCP customers (your WAN).
 448                 dhcp_this_host_add "$net" "$ifname" "$ADD_WAN_FQDN"
 449                 return 0
 450         }
 451
 452         # Do not support non-static interfaces for now
 453         [ static = "$proto" ] || return 0
 454
 455         # Override interface netmask with dhcp config if applicable
 456         config_get netmask "$cfg" netmask "${subnet##*/}"
 457
 458         #check for an already active dhcp server on the interface, unless 'force' is set
 459         config_get_bool force "$cfg" force 0
 460         [ $force -gt 0 ] || dhcp_check "$ifname" || return 0
 461
 462         config_get start "$cfg" start 100
 463         config_get limit "$cfg" limit 150
 464         config_get leasetime "$cfg" leasetime 12h
 465         config_get options "$cfg" options
 466         config_get_bool dynamicdhcp "$cfg" dynamicdhcp 1
 467
 468         config_get dhcpv4 "$cfg" dhcpv4
 469         config_get dhcpv6 "$cfg" dhcpv6
 470
 471         config_get ra "$cfg" ra
 472         config_get ra_management "$cfg" ra_management
 473         config_get ra_preference "$cfg" ra_preference
 474         config_get dns "$cfg" dns
 475
 476         config_list_foreach "$cfg" "interface_name" append_interface_name "$ifname"
 477
 478         # Put the router host name on this DHCP served interface address(es)
 479         dhcp_this_host_add "$net" "$ifname" "$ADD_LOCAL_FQDN"
 480
 481         start="$( dhcp_calc "$start" )"
 482         nettag="${networkid:+set:${networkid},}"
 483
 484         if [ "$limit" -gt 0 ] ; then
 485                 limit=$((limit-1))
 486         fi
 487
 488         eval "$(ipcalc.sh "${subnet%%/*}" $netmask $start $limit)"
 489
 490         if [ "$dynamicdhcp" = "0" ] ; then
 491                 END="static"
 492                 dhcp6range="::,static"
 493         else
 494                 dhcp6range="::1000,::ffff"
 495         fi
 496
 497
 498         if [ "$dhcpv4" != "disabled" ] ; then
 499                 xappend "--dhcp-range=$nettag$START,$END,$NETMASK,$leasetime${options:+ $options}"
 500         fi
 501
 502
 503         if [ $DNSMASQ_DHCP_VER -eq 6 -a "$ra" = "server" ] ; then
 504                 # Note: dnsmasq cannot just be a DHCPv6 server (all-in-1)
 505                 # and let some other machine(s) send RA pointing to it.
 506
 507                 case $ra_preference in
 508                 *high*)
 509                         xappend "--ra-param=$ifname,high,0,7200"
 510                         ;;
 511                 *low*)
 512                         xappend "--ra-param=$ifname,low,0,7200"
 513                         ;;
 514                 *)
 515                         # Send UNSOLICITED RA at default interval and live for 2 hours.
 516                         # TODO: convert flexible lease time into route life time (only seconds).
 517                         xappend "--ra-param=$ifname,0,7200"
 518                         ;;
 519                 esac
 520
 521                 if [ "$dhcpv6" = "disabled" ] ; then
 522                         ra_management="3"
 523                 fi
 524
 525
 526                 case $ra_management in
 527                 0)
 528                         # SLACC with DCHP for extended options
 529                         xappend "--dhcp-range=$nettag::,constructor:$ifname,ra-stateless,ra-names"
 530                         ;;
 531                 2)
 532                         # DHCP address and RA only for management redirection
 533                         xappend "--dhcp-range=$nettag$dhcp6range,constructor:$ifname,$leasetime"
 534                         ;;
 535                 3)
 536                         # SLAAC only but dnsmasq attempts to link HOSTNAME, DHCPv4 MAC, and SLAAC
 537                         xappend "--dhcp-range=$nettag::,constructor:$ifname,ra-only,ra-names"
 538                         ;;
 539                 *)
 540                         # SLAAC and full DHCP
 541                         xappend "--dhcp-range=$nettag$dhcp6range,constructor:$ifname,slaac,ra-names,$leasetime"
 542                         ;;
 543                 esac
 544
 545                 if [ -n "$dns" ]; then
 546                         dnss=""
 547                         for d in $dns; do append dnss "[$d]" ","; done
 548                 else
 549                         dnss="[::]"
 550                 fi
 551
 552                 dhcp_option_append "option6:dns-server,$dnss" "$networkid"
 553         fi
 554
 555         dhcp_option_add "$cfg" "$networkid"
 556 }
 557
 558 dhcp_option_append() {
 559         local option="$1"
 560         local networkid="$2"
 561         local force="$3"
 562
 563         xappend "--dhcp-option${force:+-force}=${networkid:+$networkid,}$option"
 564 }
 565
 566 dhcp_option_add() {
 567         # NOTE: dnsmasq has explicit "option6:" prefix for DHCPv6 so no collisions
 568         local cfg="$1"
 569         local networkid="$2"
 570         local force="$3"
 571
 572         [ "$force" = "0" ] && force=
 573
 574         local list_len
 575         config_get list_len "$cfg" dhcp_option_LENGTH
 576
 577         if [ -n "$list_len" ]; then
 578                 config_list_foreach "$cfg" dhcp_option dhcp_option_append "$networkid" "$force"
 579         else
 580                 config_get dhcp_option "$cfg" dhcp_option
 581
 582                 [ -n "$dhcp_option" ] && echo "Warning: the 'option dhcp_option' syntax is deprecated, use 'list dhcp_option'" >&2
 583
 584                 local option
 585                 for option in $dhcp_option; do
 586                         dhcp_option_append "$option" "$networkid" "$force"
 587                 done
 588         fi
 589 }
 590
 591 dhcp_domain_add() {
 592         local cfg="$1"
 593         local ip name names record
 594
 595         config_get names "$cfg" name "$2"
 596         [ -n "$names" ] || return 0
 597
 598         config_get ip "$cfg" ip "$3"
 599         [ -n "$ip" ] || return 0
 600
 601         for name in $names; do
 602                 record="${record:+$record }$name"
 603         done
 604
 605         echo "$ip $record" >> $HOSTFILE
 606 }
 607
 608 dhcp_srv_add() {
 609         local cfg="$1"
 610
 611         config_get srv "$cfg" srv
 612         [ -n "$srv" ] || return 0
 613
 614         config_get target "$cfg" target
 615         [ -n "$target" ] || return 0
 616
 617         config_get port "$cfg" port
 618         [ -n "$port" ] || return 0
 619
 620         config_get class "$cfg" class
 621         config_get weight "$cfg" weight
 622
 623         local service="$srv,$target,$port${class:+,$class${weight:+,$weight}}"
 624
 625         xappend "--srv-host=$service"
 626 }
 627
 628 dhcp_mx_add() {
 629         local cfg="$1"
 630         local domain relay pref
 631
 632         config_get domain "$cfg" domain
 633         [ -n "$domain" ] || return 0
 634
 635         config_get relay "$cfg" relay
 636         [ -n "$relay" ] || return 0
 637
 638         config_get pref "$cfg" pref 0
 639
 640         local service="$domain,$relay,$pref"
 641
 642         xappend "--mx-host=$service"
 643 }
 644
 645 dhcp_cname_add() {
 646         local cfg="$1"
 647         local cname target
 648
 649         config_get cname "$cfg" cname
 650         [ -n "$cname" ] || return 0
 651
 652         config_get target "$cfg" target
 653         [ -n "$target" ] || return 0
 654
 655         xappend "--cname=${cname},${target}"
 656 }
 657
 658 dhcp_hostrecord_add() {
 659         local cfg="$1"
 660         local names addresses record val
 661
 662         config_get names "$cfg" name "$2"
 663         if [ -z "$names" ]; then
 664                 return 0
 665         fi
 666
 667         config_get addresses "$cfg" ip "$3"
 668         if [ -z "$addresses" ]; then
 669                 return 0
 670         fi
 671
 672         for val in $names $addresses; do
 673                 record="${record:+$record,}$val"
 674         done
 675
 676         xappend "--host-record=$record"
 677 }
 678
 679 dhcp_relay_add() {
 680         local cfg="$1"
 681         local local_addr server_addr interface
 682
 683         config_get local_addr "$cfg" local_addr
 684         [ -n "$local_addr" ] || return 0
 685
 686         config_get server_addr "$cfg" server_addr
 687         [ -n "$server_addr" ] || return 0
 688
 689         config_get interface "$cfg" interface
 690         if [ -z "$interface" ]; then
 691                 xappend "--dhcp-relay=$local_addr,$server_addr"
 692         else
 693                 network_get_device ifname "$interface" || return
 694                 xappend "--dhcp-relay=$local_addr,$server_addr,$ifname"
 695         fi
 696 }
 697
 698 dnsmasq_start()
 699 {
 700         local cfg="$1" disabled resolvfile user_dhcpscript
 701
 702         config_get_bool disabled "$cfg" disabled 0
 703         [ "$disabled" -gt 0 ] && return 0
 704
 705         # reset list of DOMAINS and DNS servers (for each dnsmasq instance)
 706         DNS_SERVERS=""
 707         DOMAIN=""
 708         CONFIGFILE="${BASECONFIGFILE}.${cfg}"
 709         CONFIGFILE_TMP="${CONFIGFILE}.$$"
 710         HOSTFILE="${BASEHOSTFILE}.${cfg}"
 711         TIMESTAMPFILE="${BASETIMESTAMPFILE}.${cfg}"
 712         BASEDHCPSTAMPFILE_CFG="${BASEDHCPSTAMPFILE}.${cfg}"
 713
 714         # before we can call xappend
 715         mkdir -p /var/run/dnsmasq/
 716         mkdir -p $(dirname $CONFIGFILE)
 717         mkdir -p $(dirname $HOSTFILE)
 718         mkdir -p /var/lib/misc
 719         chown dnsmasq:dnsmasq /var/run/dnsmasq
 720
 721         [ -f "$TIMESTAMPFILE" ] && rm -f "$TIMESTAMPFILE"
 722
 723         echo "# auto-generated config file from /etc/config/dhcp" > $CONFIGFILE_TMP
 724         echo "# auto-generated config file from /etc/config/dhcp" > $HOSTFILE
 725
 726         # if we did this last, we could override auto-generated config
 727         [ -f /etc/dnsmasq.conf ] && {
 728                 xappend "--conf-file=/etc/dnsmasq.conf"
 729         }
 730
 731         $PROG --version | grep -osqE "^Compile time options:.* DHCPv6( |$)" && DHCPv6CAPABLE=1 || DHCPv6CAPABLE=0
 732
 733
 734         if [ -x /usr/sbin/odhcpd -a -x /etc/init.d/odhcpd ] ; then
 735                 local odhcpd_is_main odhcpd_is_enabled
 736                 config_get odhcpd_is_main odhcpd maindhcp 0
 737                 /etc/init.d/odhcpd enabled && odhcpd_is_enabled=1 || odhcpd_is_enabled=0
 738
 739
 740                 if [ "$odhcpd_is_enabled" -eq 0 -a "$DHCPv6CAPABLE" -eq 1 ] ; then
 741                         # DHCP V4 and V6 in DNSMASQ
 742                         DNSMASQ_DHCP_VER=6
 743                 elif [ "$odhcpd_is_main" -gt 0 ] ; then
 744                         # ODHCPD is doing it all
 745                         DNSMASQ_DHCP_VER=0
 746                 else
 747                         # You have ODHCPD but use DNSMASQ for DHCPV4
 748                         DNSMASQ_DHCP_VER=4
 749                 fi
 750
 751         elif [ "$DHCPv6CAPABLE" -eq 1 ] ; then
 752                 # DHCP V4 and V6 in DNSMASQ
 753                 DNSMASQ_DHCP_VER=6
 754         else
 755                 DNSMASQ_DHCP_VER=4
 756         fi
 757
 758         # Allow DHCP/DHCPv6 to be handled by ISC DHCPD
 759         if [ -x /usr/sbin/dhcpd ] ; then
 760                 if [ -x /etc/init.d/dhcpd ] ; then
 761                         /etc/init.d/dhcpd enabled && DNSMASQ_DHCP_VER=0
 762                 fi
 763                 if [ -x /etc/init.d/dhcpd6 -a "$DNSMASQ_DHCP_VER" -gt 0 ] ; then
 764                         /etc/init.d/dhcpd6 enabled && DNSMASQ_DHCP_VER=4
 765                 fi
 766         fi
 767
 768         append_bool "$cfg" authoritative "--dhcp-authoritative"
 769         append_bool "$cfg" nodaemon "--no-daemon"
 770         append_bool "$cfg" domainneeded "--domain-needed"
 771         append_bool "$cfg" filterwin2k "--filterwin2k"
 772         append_bool "$cfg" nohosts "--no-hosts"
 773         append_bool "$cfg" nonegcache "--no-negcache"
 774         append_bool "$cfg" strictorder "--strict-order"
 775         append_bool "$cfg" logqueries "--log-queries=extra"
 776         append_bool "$cfg" noresolv "--no-resolv"
 777         append_bool "$cfg" localise_queries "--localise-queries"
 778         append_bool "$cfg" readethers "--read-ethers"
 779         append_bool "$cfg" dbus "--enable-dbus"
 780         append_bool "$cfg" expandhosts "--expand-hosts"
 781         config_get tftp_root "$cfg" "tftp_root"
 782         [ -n "$tftp_root" ] && mkdir -p "$tftp_root" && append_bool "$cfg" enable_tftp "--enable-tftp"
 783         append_bool "$cfg" tftp_no_fail "--tftp-no-fail"
 784         append_bool "$cfg" nonwildcard "--bind-dynamic"
 785         append_bool "$cfg" fqdn "--dhcp-fqdn"
 786         append_bool "$cfg" proxydnssec "--proxy-dnssec"
 787         append_bool "$cfg" localservice "--local-service"
 788         append_bool "$cfg" logdhcp "--log-dhcp"
 789         append_bool "$cfg" quietdhcp "--quiet-dhcp"
 790         append_bool "$cfg" sequential_ip "--dhcp-sequential-ip"
 791         append_bool "$cfg" allservers "--all-servers"
 792         append_bool "$cfg" noping "--no-ping"
 793
 794         append_parm "$cfg" logfacility "--log-facility"
 795
 796         append_parm "$cfg" cachesize "--cache-size"
 797         append_parm "$cfg" dnsforwardmax "--dns-forward-max"
 798         append_parm "$cfg" port "--port"
 799         append_parm "$cfg" ednspacket_max "--edns-packet-max"
 800         append_parm "$cfg" dhcpleasemax "--dhcp-lease-max"
 801         append_parm "$cfg" "queryport" "--query-port"
 802         append_parm "$cfg" "minport" "--min-port"
 803         append_parm "$cfg" "maxport" "--max-port"
 804         append_parm "$cfg" "domain" "--domain"
 805         append_parm "$cfg" "local" "--server"
 806         config_list_foreach "$cfg" "server" append_server
 807         config_list_foreach "$cfg" "address" append_address
 808         config_list_foreach "$cfg" "ipset" append_ipset
 809         config_list_foreach "$cfg" "interface" append_interface
 810         config_list_foreach "$cfg" "notinterface" append_notinterface
 811         config_list_foreach "$cfg" "addnhosts" append_addnhosts
 812         config_list_foreach "$cfg" "bogusnxdomain" append_bogusnxdomain
 813         append_parm "$cfg" "leasefile" "--dhcp-leasefile" "/tmp/dhcp.leases"
 814         append_parm "$cfg" "serversfile" "--servers-file"
 815         append_parm "$cfg" "tftp_root" "--tftp-root"
 816         append_parm "$cfg" "dhcp_boot" "--dhcp-boot"
 817         append_parm "$cfg" "local_ttl" "--local-ttl"
 818         append_parm "$cfg" "pxe_prompt" "--pxe-prompt"
 819         config_list_foreach "$cfg" "pxe_service" append_pxe_service
 820         config_get DOMAIN "$cfg" domain
 821
 822         config_get_bool ADD_LOCAL_DOMAIN "$cfg" add_local_domain 1
 823         config_get_bool ADD_LOCAL_HOSTNAME "$cfg" add_local_hostname 1
 824         config_get ADD_LOCAL_FQDN "$cfg" add_local_fqdn ""
 825         config_get ADD_WAN_FQDN "$cfg" add_wan_fqdn 0
 826
 827         if [ -z "$ADD_LOCAL_FQDN" ] ; then
 828                 # maintain support for previous UCI
 829                 ADD_LOCAL_FQDN="$ADD_LOCAL_HOSTNAME"
 830         fi
 831
 832         config_get_bool readethers "$cfg" readethers
 833         [ "$readethers" = "1" -a \! -e "/etc/ethers" ] && touch /etc/ethers
 834
 835         xappend "--dhcp-script=$DHCPSCRIPT"
 836         config_get user_dhcpscript $cfg dhcpscript
 837
 838         config_get leasefile $cfg leasefile "/tmp/dhcp.leases"
 839         [ -n "$leasefile" -a \! -e "$leasefile" ] && touch "$leasefile"
 840         config_get_bool cachelocal "$cfg" cachelocal 1
 841
 842         config_get_bool noresolv "$cfg" noresolv 0
 843         if [ "$noresolv" != "1" ]; then
 844                 config_get resolvfile "$cfg" resolvfile "/tmp/resolv.conf.auto"
 845                 # So jail doesn't complain if file missing
 846                 [ -n "$resolvfile" -a \! -e "$resolvfile" ] && touch "$resolvfile"
 847         fi
 848
 849         [ -n "$resolvfile" ] && xappend "--resolv-file=$resolvfile"
 850
 851         config_get hostsfile "$cfg" dhcphostsfile
 852         [ -e "$hostsfile" ] && xappend "--dhcp-hostsfile=$hostsfile"
 853
 854         local rebind
 855         config_get_bool rebind "$cfg" rebind_protection 1
 856         [ $rebind -gt 0 ] && {
 857                 log_once \
 858                         "DNS rebinding protection is active," \
 859                         "will discard upstream RFC1918 responses!"
 860                 xappend "--stop-dns-rebind"
 861
 862                 local rebind_localhost
 863                 config_get_bool rebind_localhost "$cfg" rebind_localhost 0
 864                 [ $rebind_localhost -gt 0 ] && {
 865                         log_once "Allowing 127.0.0.0/8 responses"
 866                         xappend "--rebind-localhost-ok"
 867                 }
 868
 869                 append_rebind_domain() {
 870                         log_once "Allowing RFC1918 responses for domain $1"
 871                         xappend "--rebind-domain-ok=$1"
 872                 }
 873
 874                 config_list_foreach "$cfg" rebind_domain append_rebind_domain
 875         }
 876
 877         config_get_bool dnssec "$cfg" dnssec 0
 878         [ "$dnssec" -gt 0 ] && {
 879                 xappend "--conf-file=$TRUSTANCHORSFILE"
 880                 xappend "--dnssec"
 881                 [ -x /etc/init.d/sysntpd ] && {
 882                         /etc/init.d/sysntpd enabled
 883                         [ "$?" -ne 0 -o "$(uci_get system.ntp.enabled)" = "1" ] && {
 884                                 [ -f "$TIMEVALIDFILE" ] || xappend "--dnssec-no-timecheck"
 885                         }
 886                 }
 887                 append_bool "$cfg" dnsseccheckunsigned "--dnssec-check-unsigned"
 888         }
 889
 890         config_get addmac "$cfg" addmac 0
 891         [ "$addmac" != "0" ] && {
 892                 [ "$addmac" = "1" ] && addmac=
 893                 xappend "--add-mac${addmac:+="$addmac"}"
 894         }
 895
 896         dhcp_option_add "$cfg" "" 0
 897
 898         xappend "--dhcp-broadcast=tag:needs-broadcast"
 899
 900         xappend "--addn-hosts=$(dirname $HOSTFILE)"
 901
 902         config_get dnsmasqconfdir "$cfg" confdir "/tmp/dnsmasq.d"
 903         [ ! -d "$dnsmasqconfdir" ] && mkdir -p $dnsmasqconfdir
 904         xappend "--conf-dir=$dnsmasqconfdir"
 905         xappend "--user=dnsmasq"
 906         xappend "--group=dnsmasq"
 907         echo >> $CONFIGFILE_TMP
 908
 909         config_get_bool enable_tftp "$cfg" enable_tftp 0
 910         [ "$enable_tftp" -gt 0 ] && {
 911                 config_get tftp_root "$cfg" tftp_root
 912                 append EXTRA_MOUNT $tftp_root
 913         }
 914
 915         config_foreach filter_dnsmasq host dhcp_host_add "$cfg"
 916         echo >> $CONFIGFILE_TMP
 917         config_foreach filter_dnsmasq boot dhcp_boot_add "$cfg"
 918         config_foreach filter_dnsmasq mac dhcp_mac_add "$cfg"
 919         config_foreach filter_dnsmasq tag dhcp_tag_add "$cfg"
 920         config_foreach filter_dnsmasq vendorclass dhcp_vendorclass_add "$cfg"
 921         config_foreach filter_dnsmasq userclass dhcp_userclass_add "$cfg"
 922         config_foreach filter_dnsmasq circuitid dhcp_circuitid_add "$cfg"
 923         config_foreach filter_dnsmasq remoteid dhcp_remoteid_add "$cfg"
 924         config_foreach filter_dnsmasq subscrid dhcp_subscrid_add "$cfg"
 925         config_foreach filter_dnsmasq match dhcp_match_add "$cfg"
 926         config_foreach filter_dnsmasq domain dhcp_domain_add "$cfg"
 927         config_foreach filter_dnsmasq hostrecord dhcp_hostrecord_add "$cfg"
 928         config_foreach filter_dnsmasq relay dhcp_relay_add "$cfg"
 929
 930         echo >> $CONFIGFILE_TMP
 931         config_foreach filter_dnsmasq srvhost dhcp_srv_add "$cfg"
 932         config_foreach filter_dnsmasq mxhost dhcp_mx_add "$cfg"
 933         echo >> $CONFIGFILE_TMP
 934
 935         config_get_bool boguspriv "$cfg" boguspriv 1
 936         [ "$boguspriv" -gt 0 ] && {
 937                 xappend "--bogus-priv"
 938                 [ -r "$RFC6761FILE" ] && xappend "--conf-file=$RFC6761FILE"
 939         }
 940
 941         if [ "$DNSMASQ_DHCP_VER" -gt 4 ] ; then
 942                 # Enable RA feature for when/if it is constructed,
 943                 # and RA is selected per interface pool (RA, DHCP, or both),
 944                 # but no one (should) want RA broadcast in syslog
 945                 config_foreach filter_dnsmasq dhcp dhcp_add "$cfg"
 946                 xappend "--enable-ra"
 947                 xappend "--quiet-ra"
 948                 append_bool "$cfg" quietdhcp "--quiet-dhcp6"
 949
 950         elif [ "$DNSMASQ_DHCP_VER" -gt 0 ] ; then
 951                 config_foreach filter_dnsmasq dhcp dhcp_add "$cfg"
 952         fi
 953
 954
 955         echo >> $CONFIGFILE_TMP
 956         config_foreach filter_dnsmasq cname dhcp_cname_add "$cfg"
 957         echo >> $CONFIGFILE_TMP
 958
 959         echo >> $CONFIGFILE_TMP
 960         mv -f $CONFIGFILE_TMP $CONFIGFILE
 961
 962         [ "$resolvfile" = "/tmp/resolv.conf.auto" ] && {
 963                 rm -f /tmp/resolv.conf
 964                 [ $ADD_LOCAL_DOMAIN -eq 1 ] && [ -n "$DOMAIN" ] && {
 965                         echo "search $DOMAIN" >> /tmp/resolv.conf
 966                 }
 967                 DNS_SERVERS="$DNS_SERVERS 127.0.0.1"
 968                 for DNS_SERVER in $DNS_SERVERS ; do
 969                         echo "nameserver $DNS_SERVER" >> /tmp/resolv.conf
 970                 done
 971         }
 972
 973         procd_open_instance $cfg
 974         procd_set_param command $PROG -C $CONFIGFILE -k -x /var/run/dnsmasq/dnsmasq."${cfg}".pid
 975         procd_set_param file $CONFIGFILE
 976         [ -n "$user_dhcpscript" ] && procd_set_param env USER_DHCPSCRIPT="$user_dhcpscript"
 977         procd_set_param respawn
 978
 979         local dnsmasqconffile="/etc/dnsmasq.${cfg}.conf"
 980         if [ ! -r "$dnsmasqconffile" ]; then
 981                 dnsmasqconffile=/etc/dnsmasq.conf
 982         fi
 983
 984         procd_add_jail dnsmasq ubus log
 985         procd_add_jail_mount $CONFIGFILE $TRUSTANCHORSFILE $HOSTFILE $RFC6761FILE /etc/passwd /etc/group /etc/TZ /dev/null /dev/urandom $dnsmasqconffile $dnsmasqconfdir $resolvfile $user_dhcpscript /etc/hosts /etc/ethers /sbin/hotplug-call $EXTRA_MOUNT $DHCPSCRIPT
 986         procd_add_jail_mount_rw /var/run/dnsmasq/ $leasefile
 987
 988         procd_close_instance
 989 }
 990
 991 dnsmasq_stop()
 992 {
 993         local cfg="$1"
 994
 995         config_get resolvfile "$cfg" "resolvfile"
 996
 997         #relink /tmp/resolve.conf only for main instance
 998         [ "$resolvfile" = "/tmp/resolv.conf.auto" ] && {
 999                 [ -f /tmp/resolv.conf ] && {
1000                         rm -f /tmp/resolv.conf
1001                         ln -s "$resolvfile" /tmp/resolv.conf
1002                 }
1003         }
1004
1005         rm -f ${BASEDHCPSTAMPFILE}.${cfg}.*.dhcp
1006 }
1007
1008 service_triggers()
1009 {
1010         procd_add_reload_trigger "dhcp"
1011         procd_add_raw_trigger "interface.*" 2000 /etc/init.d/dnsmasq reload
1012 }
1013
1014 boot()
1015 {
1016         BOOT=1
1017         start "$@"
1018 }
1019
1020 start_service() {
1021         local instance="$1"
1022         local instance_found=0
1023
1024         [ -n "$BOOT" ] && return
1025
1026         . /lib/functions/network.sh
1027
1028         config_cb() {
1029                 local type="$1"
1030                 local name="$2"
1031                 if [ "$type" = "dnsmasq" ]; then
1032                         if [ -n "$instance" -a "$instance" = "$name" ]; then
1033                                 instance_found=1
1034                         fi
1035                 fi
1036         }
1037
1038         config_load dhcp
1039
1040         if [ -n "$instance" ]; then
1041                 [ "$instance_found" -gt 0 ] || return
1042                 dnsmasq_start "$instance"
1043         else
1044                 config_foreach dnsmasq_start dnsmasq
1045         fi
1046 }
1047
1048 reload_service() {
1049         rc_procd start_service "$@"
1050         return 0
1051 }
1052
1053 stop_service() {
1054         local instance="$1"
1055         local instance_found=0
1056
1057         config_cb() {
1058                 local type="$1"
1059                 local name="$2"
1060                 if [ "$type" = "dnsmasq" ]; then
1061                         if [ -n "$instance" -a "$instance" = "$name" ]; then
1062                                 instance_found=1
1063                         fi
1064                 fi
1065         }
1066
1067         config_load dhcp
1068
1069         if [ -n "$instance" ]; then
1070                 [ "$instance_found" -gt 0 ] || return
1071                 dnsmasq_stop "$instance"
1072         else
1073                 config_foreach dnsmasq_stop dnsmasq
1074         fi
1075 }