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

   1 #!/bin/sh /etc/rc.common
   2 # Copyright (C) 2007-2012 OpenWrt.org
   3
   4 START=60
   5
   6 USE_PROCD=1
   7 PROG=/usr/sbin/dnsmasq
   8
   9 DNS_SERVERS=""
  10 DOMAIN=""
  11
  12 ADD_LOCAL_DOMAIN=1
  13 ADD_LOCAL_HOSTNAME=1
  14
  15 CONFIGFILE="/var/etc/dnsmasq.conf"
  16 HOSTFILE="/tmp/hosts/dhcp"
  17 TRUSTANCHORSFILE="/usr/share/dnsmasq/trust-anchors.conf"
  18
  19 xappend() {
  20         local value="$1"
  21
  22         echo "${value#--}" >> $CONFIGFILE
  23 }
  24
  25 dhcp_calc() {
  26         local ip="$1"
  27         local res=0
  28
  29         while [ -n "$ip" ]; do
  30                 part="${ip%%.*}"
  31                 res="$(($res * 256))"
  32                 res="$(($res + $part))"
  33                 [ "${ip%.*}" != "$ip" ] && ip="${ip#*.}" || ip=
  34         done
  35         echo "$res"
  36 }
  37
  38 dhcp_check() {
  39         local ifname="$1"
  40         local stamp="/var/run/dnsmasq.$ifname.dhcp"
  41         local rv=0
  42
  43         [ -s "$stamp" ] && return $(cat "$stamp")
  44
  45         udhcpc -n -q -s /bin/true -t 1 -i "$ifname" >&- && rv=1 || rv=0
  46
  47         [ $rv -eq 1 ] && \
  48                 logger -t dnsmasq \
  49                         "found already running DHCP-server on interface '$ifname'" \
  50                         "refusing to start, use 'option force 1' to override"
  51
  52         echo $rv > "$stamp"
  53         return $rv
  54 }
  55
  56 log_once() {
  57         pidof dnsmasq >/dev/null || \
  58                 logger -t dnsmasq "$@"
  59 }
  60
  61 append_bool() {
  62         local section="$1"
  63         local option="$2"
  64         local value="$3"
  65         local _loctmp
  66         config_get_bool _loctmp "$section" "$option" 0
  67         [ $_loctmp -gt 0 ] && xappend "$value"
  68 }
  69
  70 append_parm() {
  71         local section="$1"
  72         local option="$2"
  73         local switch="$3"
  74         local _loctmp
  75         config_get _loctmp "$section" "$option"
  76         [ -z "$_loctmp" ] && return 0
  77         xappend "$switch=$_loctmp"
  78 }
  79
  80 append_server() {
  81         xappend "--server=$1"
  82 }
  83
  84 append_address() {
  85         xappend "--address=$1"
  86 }
  87
  88 append_ipset() {
  89         xappend "--ipset=$1"
  90 }
  91
  92 append_interface() {
  93         local ifname=$(uci_get_state network "$1" ifname "$1")
  94         xappend "--interface=$ifname"
  95 }
  96
  97 append_notinterface() {
  98         local ifname=$(uci_get_state network "$1" ifname "$1")
  99         xappend "--except-interface=$ifname"
 100 }
 101
 102 append_addnhosts() {
 103         xappend "--addn-hosts=$1"
 104 }
 105
 106 append_bogusnxdomain() {
 107         xappend "--bogus-nxdomain=$1"
 108 }
 109
 110 append_pxe_service() {
 111         xappend "--pxe-service=$1"
 112 }
 113
 114 dnsmasq() {
 115         local cfg="$1"
 116         append_bool "$cfg" authoritative "--dhcp-authoritative"
 117         append_bool "$cfg" nodaemon "--no-daemon"
 118         append_bool "$cfg" domainneeded "--domain-needed"
 119         append_bool "$cfg" filterwin2k "--filterwin2k"
 120         append_bool "$cfg" nohosts "--no-hosts"
 121         append_bool "$cfg" nonegcache "--no-negcache"
 122         append_bool "$cfg" strictorder "--strict-order"
 123         append_bool "$cfg" logqueries "--log-queries"
 124         append_bool "$cfg" noresolv "--no-resolv"
 125         append_bool "$cfg" localise_queries "--localise-queries"
 126         append_bool "$cfg" readethers "--read-ethers"
 127         append_bool "$cfg" dbus "--enable-dbus"
 128         append_bool "$cfg" boguspriv "--bogus-priv"
 129         append_bool "$cfg" expandhosts "--expand-hosts"
 130         append_bool "$cfg" enable_tftp "--enable-tftp"
 131         append_bool "$cfg" tftp_no_fail "--tftp-no-fail"
 132         append_bool "$cfg" nonwildcard "--bind-interfaces"
 133         append_bool "$cfg" fqdn "--dhcp-fqdn"
 134         append_bool "$cfg" proxydnssec "--proxy-dnssec"
 135         append_bool "$cfg" localservice "--local-service"
 136         append_bool "$cfg" quietdhcp "--quiet-dhcp"
 137
 138         append_parm "$cfg" dhcpscript "--dhcp-script"
 139         append_parm "$cfg" cachesize "--cache-size"
 140         append_parm "$cfg" dnsforwardmax "--dns-forward-max"
 141         append_parm "$cfg" port "--port"
 142         append_parm "$cfg" ednspacket_max "--edns-packet-max"
 143         append_parm "$cfg" dhcpleasemax "--dhcp-lease-max"
 144         append_parm "$cfg" "queryport" "--query-port"
 145         append_parm "$cfg" "domain" "--domain"
 146         append_parm "$cfg" "local" "--server"
 147         config_list_foreach "$cfg" "server" append_server
 148         config_list_foreach "$cfg" "address" append_address
 149         config_list_foreach "$cfg" "ipset" append_ipset
 150         config_list_foreach "$cfg" "interface" append_interface
 151         config_list_foreach "$cfg" "notinterface" append_notinterface
 152         config_list_foreach "$cfg" "addnhosts" append_addnhosts
 153         config_list_foreach "$cfg" "bogusnxdomain" append_bogusnxdomain
 154         append_parm "$cfg" "leasefile" "--dhcp-leasefile"
 155         append_parm "$cfg" "resolvfile" "--resolv-file"
 156         append_parm "$cfg" "serversfile" "--servers-file"
 157         append_parm "$cfg" "tftp_root" "--tftp-root"
 158         append_parm "$cfg" "dhcp_boot" "--dhcp-boot"
 159         append_parm "$cfg" "local_ttl" "--local-ttl"
 160         append_parm "$cfg" "pxe_prompt" "--pxe-prompt"
 161         config_list_foreach "$cfg" "pxe_service" append_pxe_service
 162         config_get DOMAIN "$cfg" domain
 163
 164         config_get_bool ADD_LOCAL_DOMAIN "$cfg" add_local_domain 1
 165         config_get_bool ADD_LOCAL_HOSTNAME "$cfg" add_local_hostname 1
 166
 167         config_get_bool readethers "$cfg" readethers
 168         [ "$readethers" = "1" -a \! -e "/etc/ethers" ] && touch /etc/ethers
 169
 170         config_get leasefile $cfg leasefile
 171         [ -n "$leasefile" -a \! -e "$leasefile" ] && touch "$leasefile"
 172         config_get_bool cachelocal "$cfg" cachelocal 1
 173
 174         config_get hostsfile "$cfg" dhcphostsfile
 175         [ -e "$hostsfile" ] && xappend "--dhcp-hostsfile=$hostsfile"
 176
 177         mkdir -p /tmp/hosts /tmp/dnsmasq.d
 178         xappend "--addn-hosts=/tmp/hosts"
 179         xappend "--conf-dir=/tmp/dnsmasq.d"
 180
 181         local rebind
 182         config_get_bool rebind "$cfg" rebind_protection 1
 183         [ $rebind -gt 0 ] && {
 184                 log_once \
 185                         "DNS rebinding protection is active," \
 186                         "will discard upstream RFC1918 responses!"
 187                 xappend "--stop-dns-rebind"
 188
 189                 local rebind_localhost
 190                 config_get_bool rebind_localhost "$cfg" rebind_localhost 0
 191                 [ $rebind_localhost -gt 0 ] && {
 192                         log_once "Allowing 127.0.0.0/8 responses"
 193                         xappend "--rebind-localhost-ok"
 194                 }
 195
 196                 append_rebind_domain() {
 197                         log_once "Allowing RFC1918 responses for domain $1"
 198                         xappend "--rebind-domain-ok=$1"
 199                 }
 200
 201                 config_list_foreach "$cfg" rebind_domain append_rebind_domain
 202         }
 203
 204         config_get_bool dnssec "$cfg" dnssec 0
 205         [ "$dnssec" -gt 0 ] && {
 206                 xappend "--conf-file=$TRUSTANCHORSFILE"
 207                 xappend "--dnssec"
 208                 xappend "--dnssec-timestamp=/etc/dnsmasq.time"
 209                 append_bool "$cfg" dnsseccheckunsigned "--dnssec-check-unsigned"
 210         }
 211
 212         dhcp_option_add "$cfg" "" 0
 213
 214         xappend "--dhcp-broadcast=tag:needs-broadcast"
 215
 216         echo >> $CONFIGFILE
 217 }
 218
 219 dhcp_subscrid_add() {
 220         local cfg="$1"
 221
 222         config_get networkid "$cfg" networkid
 223         [ -n "$networkid" ] || return 0
 224
 225         config_get subscriberid "$cfg" subscriberid
 226         [ -n "$subscriberid" ] || return 0
 227
 228         xappend "--dhcp-subscrid=$networkid,$subscriberid"
 229
 230         config_get_bool force "$cfg" force 0
 231
 232         dhcp_option_add "$cfg" "$networkid" "$force"
 233 }
 234
 235 dhcp_remoteid_add() {
 236         local cfg="$1"
 237
 238         config_get networkid "$cfg" networkid
 239         [ -n "$networkid" ] || return 0
 240
 241         config_get remoteid "$cfg" remoteid
 242         [ -n "$remoteid" ] || return 0
 243
 244         xappend "--dhcp-remoteid=$networkid,$remoteid"
 245
 246         config_get_bool force "$cfg" force 0
 247
 248         dhcp_option_add "$cfg" "$networkid" "$force"
 249 }
 250
 251 dhcp_circuitid_add() {
 252         local cfg="$1"
 253
 254         config_get networkid "$cfg" networkid
 255         [ -n "$networkid" ] || return 0
 256
 257         config_get circuitid "$cfg" circuitid
 258         [ -n "$circuitid" ] || return 0
 259
 260         xappend "--dhcp-circuitid=$networkid,$circuitid"
 261
 262         config_get_bool force "$cfg" force 0
 263
 264         dhcp_option_add "$cfg" "$networkid" "$force"
 265 }
 266
 267 dhcp_userclass_add() {
 268         local cfg="$1"
 269
 270         config_get networkid "$cfg" networkid
 271         [ -n "$networkid" ] || return 0
 272
 273         config_get userclass "$cfg" userclass
 274         [ -n "$userclass" ] || return 0
 275
 276         xappend "--dhcp-userclass=$networkid,$userclass"
 277
 278         config_get_bool force "$cfg" force 0
 279
 280         dhcp_option_add "$cfg" "$networkid" "$force"
 281 }
 282
 283 dhcp_vendorclass_add() {
 284         local cfg="$1"
 285
 286         config_get networkid "$cfg" networkid
 287         [ -n "$networkid" ] || return 0
 288
 289         config_get vendorclass "$cfg" vendorclass
 290         [ -n "$vendorclass" ] || return 0
 291
 292         xappend "--dhcp-vendorclass=$networkid,$vendorclass"
 293
 294         config_get_bool force "$cfg" force 0
 295
 296         dhcp_option_add "$cfg" "$networkid" "$force"
 297 }
 298
 299 dhcp_host_add() {
 300         local cfg="$1"
 301
 302         config_get_bool force "$cfg" force 0
 303
 304         config_get networkid "$cfg" networkid
 305         [ -n "$networkid" ] && dhcp_option_add "$cfg" "$networkid" "$force"
 306
 307         config_get name "$cfg" name
 308         config_get ip "$cfg" ip
 309         [ -n "$ip" -o -n "$name" ] || return 0
 310
 311         config_get_bool dns "$cfg" dns 0
 312         [ "$dns" = "1" -a -n "$ip" -a -n "$name" ] && {
 313                 echo "$ip $name${DOMAIN:+.$DOMAIN}" >> $HOSTFILE
 314         }
 315
 316         config_get mac "$cfg" mac
 317         if [ -n "$mac" ]; then
 318                 # --dhcp-host=00:20:e0:3b:13:af,192.168.0.199,lap
 319                 macs=""
 320                 for m in $mac; do append macs "$m" ","; done
 321         else
 322                 # --dhcp-host=lap,192.168.0.199
 323                 [ -n "$name" ] || return 0
 324                 macs="$name"
 325                 name=""
 326         fi
 327
 328         config_get tag "$cfg" tag
 329
 330         config_get_bool broadcast "$cfg" broadcast 0
 331         [ "$broadcast" = "0" ] && broadcast=
 332
 333         xappend "--dhcp-host=$macs${networkid:+,net:$networkid}${broadcast:+,set:needs-broadcast}${tag:+,set:$tag}${ip:+,$ip}${name:+,$name}"
 334 }
 335
 336 dhcp_tag_add() {
 337         local cfg="$1"
 338
 339         tag="$cfg"
 340
 341         [ -n "$tag" ] || return 0
 342
 343         config_get_bool force "$cfg" force 0
 344         [ "$force" = "0" ] && force=
 345
 346         config_get option "$cfg" dhcp_option
 347         for o in $option; do
 348                 xappend "--dhcp-option${force:+-force}=tag:$tag,$o"
 349         done
 350 }
 351
 352 dhcp_mac_add() {
 353         local cfg="$1"
 354
 355         config_get networkid "$cfg" networkid
 356         [ -n "$networkid" ] || return 0
 357
 358         config_get mac "$cfg" mac
 359         [ -n "$mac" ] || return 0
 360
 361         xappend "--dhcp-mac=$networkid,$mac"
 362
 363         dhcp_option_add "$cfg" "$networkid"
 364 }
 365
 366 dhcp_boot_add() {
 367         local cfg="$1"
 368
 369         config_get networkid "$cfg" networkid
 370
 371         config_get filename "$cfg" filename
 372         [ -n "$filename" ] || return 0
 373
 374         config_get servername "$cfg" servername
 375         config_get serveraddress "$cfg" serveraddress
 376
 377         [ -n "$serveraddress" -a ! -n "$servername" ] && return 0
 378
 379         xappend "--dhcp-boot=${networkid:+net:$networkid,}${filename}${servername:+,$servername}${serveraddress:+,$serveraddress}"
 380
 381         config_get_bool force "$cfg" force 0
 382
 383         dhcp_option_add "$cfg" "$networkid" "$force"
 384 }
 385
 386
 387 dhcp_add() {
 388         local cfg="$1"
 389         config_get net "$cfg" interface
 390         [ -n "$net" ] || return 0
 391
 392         config_get dhcpv4 "$cfg" dhcpv4
 393         [ "$dhcpv4" != "disabled" ] || return 0
 394
 395         config_get networkid "$cfg" networkid
 396         [ -n "$networkid" ] || networkid="$net"
 397
 398         network_get_subnet subnet "$net" || return 0
 399         network_get_device ifname "$net" || return 0
 400         network_get_protocol proto "$net" || return 0
 401
 402         [ "$cachelocal" = "0" ] && network_get_dnsserver dnsserver "$net" && {
 403                 DNS_SERVERS="$DNS_SERVERS $dnsserver"
 404         }
 405
 406         append_bool "$cfg" ignore "--no-dhcp-interface=$ifname" && return 0
 407
 408         # Do not support non-static interfaces for now
 409         [ static = "$proto" ] || return 0
 410
 411         # Override interface netmask with dhcp config if applicable
 412         config_get netmask "$cfg" netmask "${subnet##*/}"
 413
 414         #check for an already active dhcp server on the interface, unless 'force' is set
 415         config_get_bool force "$cfg" force 0
 416         [ $force -gt 0 ] || dhcp_check "$ifname" || return 0
 417
 418         config_get start "$cfg" start
 419         config_get limit "$cfg" limit
 420         config_get leasetime "$cfg" leasetime
 421         config_get options "$cfg" options
 422         config_get_bool dynamicdhcp "$cfg" dynamicdhcp 1
 423
 424         leasetime="${leasetime:-12h}"
 425         start="$(dhcp_calc "${start:-100}")"
 426         limit="${limit:-150}"
 427         [ "$limit" -gt 0 ] && limit=$((limit-1))
 428         eval "$(ipcalc.sh "${subnet%%/*}" $netmask $start $limit)"
 429         if [ "$dynamicdhcp" = "0" ]; then END="static"; fi
 430         xappend "--dhcp-range=$networkid,$START,$END,$NETMASK,$leasetime${options:+ $options}"
 431
 432         dhcp_option_add "$cfg" "$networkid"
 433 }
 434
 435 dhcp_option_add() {
 436         local cfg="$1"
 437         local networkid="$2"
 438         local force="$3"
 439
 440         [ "$force" = "0" ] && force=
 441
 442         config_get dhcp_option "$cfg" dhcp_option
 443         for o in $dhcp_option; do
 444                 xappend "--dhcp-option${force:+-force}=${networkid:+$networkid,}$o"
 445         done
 446
 447 }
 448
 449 dhcp_domain_add() {
 450         local cfg="$1"
 451         local ip name names record
 452
 453         config_get names "$cfg" name "$2"
 454         [ -n "$names" ] || return 0
 455
 456         config_get ip "$cfg" ip "$3"
 457         [ -n "$ip" ] || return 0
 458
 459         for name in $names; do
 460                 record="${record:+$record }$name"
 461         done
 462
 463         echo "$ip $record" >> $HOSTFILE
 464 }
 465
 466 dhcp_srv_add() {
 467         local cfg="$1"
 468
 469         config_get srv "$cfg" srv
 470         [ -n "$srv" ] || return 0
 471
 472         config_get target "$cfg" target
 473         [ -n "$target" ] || return 0
 474
 475         config_get port "$cfg" port
 476         [ -n "$port" ] || return 0
 477
 478         config_get class "$cfg" class
 479         config_get weight "$cfg" weight
 480
 481         local service="$srv,$target,$port${class:+,$class${weight:+,$weight}}"
 482
 483         xappend "--srv-host=$service"
 484 }
 485
 486 dhcp_mx_add() {
 487         local cfg="$1"
 488         local domain relay pref
 489
 490         config_get domain "$cfg" domain
 491         [ -n "$domain" ] || return 0
 492
 493         config_get relay "$cfg" relay
 494         [ -n "$relay" ] || return 0
 495
 496         config_get pref "$cfg" pref 0
 497
 498         local service="$domain,$relay,$pref"
 499
 500         xappend "--mx-host=$service"
 501 }
 502
 503 dhcp_cname_add() {
 504         local cfg="$1"
 505         local cname target
 506
 507         config_get cname "$cfg" cname
 508         [ -n "$cname" ] || return 0
 509
 510         config_get target "$cfg" target
 511         [ -n "$target" ] || return 0
 512
 513         xappend "--cname=${cname},${target}"
 514 }
 515
 516 dhcp_hostrecord_add() {
 517         local cfg="$1"
 518         local names addresses record val
 519
 520         config_get names "$cfg" name "$2"
 521         if [ -z "$names" ]; then
 522                 return 0
 523         fi
 524
 525         config_get addresses "$cfg" ip "$3"
 526         if [ -z "$addresses" ]; then
 527                 return 0
 528         fi
 529
 530         for val in $names $addresses; do
 531                 record="${record:+$record,}$val"
 532         done
 533
 534         xappend "--host-record=$record"
 535 }
 536
 537 service_triggers()
 538 {
 539         procd_add_reload_trigger "dhcp"
 540 }
 541
 542 boot() {
 543         # Will be launched through hotplug
 544         return 0
 545 }
 546
 547 start_service() {
 548         include /lib/functions
 549
 550         config_load dhcp
 551
 552         procd_open_instance
 553         procd_set_param command $PROG -C $CONFIGFILE -k -x /var/run/dnsmasq/dnsmasq.pid
 554         procd_set_param file $CONFIGFILE
 555         procd_set_param respawn
 556
 557         procd_add_jail dnsmasq ubus log
 558         procd_add_jail_mount $CONFIGFILE $TRUSTANCHORSFILE $HOSTFILE /etc/passwd /dev/urandom /etc/dnsmasq.conf /tmp/dnsmasq.d /tmp/resolv.conf.auto /etc/hosts /etc/ethers
 559         procd_add_jail_mount_rw /var/run/dnsmasq/ /tmp/dhcp.leases /etc/dnsmasq.time
 560
 561         procd_close_instance
 562
 563         # before we can call xappend
 564         mkdir -p /var/run/dnsmasq/
 565         mkdir -p $(dirname $CONFIGFILE)
 566         mkdir -p /var/lib/misc
 567         touch /tmp/dhcp.leases
 568
 569         if [ ! -f /etc/dnsmasq.time ]; then
 570                 touch -t 197001010000 /etc/dnsmasq.time
 571                 chmod 0777 /etc/dnsmasq.time
 572         fi
 573
 574         echo "# auto-generated config file from /etc/config/dhcp" > $CONFIGFILE
 575         echo "# auto-generated config file from /etc/config/dhcp" > $HOSTFILE
 576
 577         # if we did this last, we could override auto-generated config
 578         [ -f /etc/dnsmasq.conf ] && {
 579                 xappend "--conf-file=/etc/dnsmasq.conf"
 580         }
 581
 582         args=""
 583         config_foreach dnsmasq dnsmasq
 584         config_foreach dhcp_host_add host
 585         echo >> $CONFIGFILE
 586         config_foreach dhcp_boot_add boot
 587         config_foreach dhcp_mac_add mac
 588         config_foreach dhcp_tag_add tag
 589         config_foreach dhcp_vendorclass_add vendorclass
 590         config_foreach dhcp_userclass_add userclass
 591         config_foreach dhcp_circuitid_add circuitid
 592         config_foreach dhcp_remoteid_add remoteid
 593         config_foreach dhcp_subscrid_add subscrid
 594         config_foreach dhcp_domain_add domain
 595         config_foreach dhcp_hostrecord_add hostrecord
 596
 597         # add own hostname
 598         local lanaddr
 599         [ $ADD_LOCAL_HOSTNAME -eq 1 ] && network_get_ipaddr lanaddr "lan" && {
 600                 local hostname="$(uci_get system @system[0] hostname OpenWrt)"
 601                 dhcp_domain_add "" "$hostname" "$lanaddr"
 602         }
 603
 604         echo >> $CONFIGFILE
 605         config_foreach dhcp_srv_add srvhost
 606         config_foreach dhcp_mx_add mxhost
 607         echo >> $CONFIGFILE
 608
 609         config_get odhcpd_is_active odhcpd maindhcp
 610         if [ "$odhcpd_is_active" != "1" ]; then
 611                 config_foreach dhcp_add dhcp
 612         fi
 613
 614         echo >> $CONFIGFILE
 615         config_foreach dhcp_cname_add cname
 616         echo >> $CONFIGFILE
 617
 618         rm -f /tmp/resolv.conf
 619         [ $ADD_LOCAL_DOMAIN -eq 1 ] && [ -n "$DOMAIN" ] && {
 620                 echo "search $DOMAIN" >> /tmp/resolv.conf
 621         }
 622         DNS_SERVERS="$DNS_SERVERS 127.0.0.1"
 623         for DNS_SERVER in $DNS_SERVERS ; do
 624                 echo "nameserver $DNS_SERVER" >> /tmp/resolv.conf
 625         done
 626 }
 627
 628 reload_service() {
 629         rc_procd start_service "$@"
 630         return 0
 631 }
 632
 633 stop_service() {
 634         [ -f /tmp/resolv.conf ] && {
 635                 rm -f /tmp/resolv.conf
 636                 ln -s /tmp/resolv.conf.auto /tmp/resolv.conf
 637         }
 638         rm -f /var/run/dnsmasq.*.dhcp
 639 }