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

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