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