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

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