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         append_bool "$cfg" quietdhcp "--quiet-dhcp"
 132
 133         append_parm "$cfg" dhcpscript "--dhcp-script"
 134         append_parm "$cfg" cachesize "--cache-size"
 135         append_parm "$cfg" dnsforwardmax "--dns-forward-max"
 136         append_parm "$cfg" port "--port"
 137         append_parm "$cfg" ednspacket_max "--edns-packet-max"
 138         append_parm "$cfg" dhcpleasemax "--dhcp-lease-max"
 139         append_parm "$cfg" "queryport" "--query-port"
 140         append_parm "$cfg" "domain" "--domain"
 141         append_parm "$cfg" "local" "--server"
 142         config_list_foreach "$cfg" "server" append_server
 143         config_list_foreach "$cfg" "address" append_address
 144         config_list_foreach "$cfg" "ipset" append_ipset
 145         config_list_foreach "$cfg" "interface" append_interface
 146         config_list_foreach "$cfg" "notinterface" append_notinterface
 147         config_list_foreach "$cfg" "addnhosts" append_addnhosts
 148         config_list_foreach "$cfg" "bogusnxdomain" append_bogusnxdomain
 149         append_parm "$cfg" "leasefile" "--dhcp-leasefile"
 150         append_parm "$cfg" "resolvfile" "--resolv-file"
 151         append_parm "$cfg" "tftp_root" "--tftp-root"
 152         append_parm "$cfg" "dhcp_boot" "--dhcp-boot"
 153         append_parm "$cfg" "local_ttl" "--local-ttl"
 154
 155         config_get DOMAIN "$cfg" domain
 156
 157         config_get_bool ADD_LOCAL_DOMAIN "$cfg" add_local_domain 1
 158         config_get_bool ADD_LOCAL_HOSTNAME "$cfg" add_local_hostname 1
 159
 160         config_get_bool readethers "$cfg" readethers
 161         [ "$readethers" = "1" -a \! -e "/etc/ethers" ] && touch /etc/ethers
 162
 163         config_get leasefile $cfg leasefile
 164         [ -n "$leasefile" -a \! -e "$leasefile" ] && touch "$leasefile"
 165         config_get_bool cachelocal "$cfg" cachelocal 1
 166
 167         config_get hostsfile "$cfg" dhcphostsfile
 168         [ -e "$hostsfile" ] && xappend "--dhcp-hostsfile=$hostsfile"
 169
 170         mkdir -p /tmp/hosts /tmp/dnsmasq.d
 171         xappend "--addn-hosts=/tmp/hosts"
 172         xappend "--conf-dir=/tmp/dnsmasq.d"
 173
 174         local rebind
 175         config_get_bool rebind "$cfg" rebind_protection 1
 176         [ $rebind -gt 0 ] && {
 177                 log_once \
 178                         "DNS rebinding protection is active," \
 179                         "will discard upstream RFC1918 responses!"
 180                 xappend "--stop-dns-rebind"
 181
 182                 local rebind_localhost
 183                 config_get_bool rebind_localhost "$cfg" rebind_localhost 0
 184                 [ $rebind_localhost -gt 0 ] && {
 185                         log_once "Allowing 127.0.0.0/8 responses"
 186                         xappend "--rebind-localhost-ok"
 187                 }
 188
 189                 append_rebind_domain() {
 190                         log_once "Allowing RFC1918 responses for domain $1"
 191                         xappend "--rebind-domain-ok=$1"
 192                 }
 193
 194                 config_list_foreach "$cfg" rebind_domain append_rebind_domain
 195         }
 196
 197         config_get_bool dnssec "$cfg" dnssec 0
 198         [ "$dnssec" -gt 0 ] && {
 199                 xappend "--conf-file=$TRUSTANCHORSFILE"
 200                 xappend "--dnssec"
 201                 append_bool "$cfg" dnsseccheckunsigned "--dnssec-check-unsigned"
 202         }
 203
 204         dhcp_option_add "$cfg" "" 0
 205
 206         xappend "--dhcp-broadcast=tag:needs-broadcast"
 207
 208         echo >> $CONFIGFILE
 209 }
 210
 211 dhcp_subscrid_add() {
 212         local cfg="$1"
 213
 214         config_get networkid "$cfg" networkid
 215         [ -n "$networkid" ] || return 0
 216
 217         config_get subscriberid "$cfg" subscriberid
 218         [ -n "$subscriberid" ] || return 0
 219
 220         xappend "--dhcp-subscrid=$networkid,$subscriberid"
 221
 222         config_get_bool force "$cfg" force 0
 223
 224         dhcp_option_add "$cfg" "$networkid" "$force"
 225 }
 226
 227 dhcp_remoteid_add() {
 228         local cfg="$1"
 229
 230         config_get networkid "$cfg" networkid
 231         [ -n "$networkid" ] || return 0
 232
 233         config_get remoteid "$cfg" remoteid
 234         [ -n "$remoteid" ] || return 0
 235
 236         xappend "--dhcp-remoteid=$networkid,$remoteid"
 237
 238         config_get_bool force "$cfg" force 0
 239
 240         dhcp_option_add "$cfg" "$networkid" "$force"
 241 }
 242
 243 dhcp_circuitid_add() {
 244         local cfg="$1"
 245
 246         config_get networkid "$cfg" networkid
 247         [ -n "$networkid" ] || return 0
 248
 249         config_get circuitid "$cfg" circuitid
 250         [ -n "$circuitid" ] || return 0
 251
 252         xappend "--dhcp-circuitid=$networkid,$circuitid"
 253
 254         config_get_bool force "$cfg" force 0
 255
 256         dhcp_option_add "$cfg" "$networkid" "$force"
 257 }
 258
 259 dhcp_userclass_add() {
 260         local cfg="$1"
 261
 262         config_get networkid "$cfg" networkid
 263         [ -n "$networkid" ] || return 0
 264
 265         config_get userclass "$cfg" userclass
 266         [ -n "$userclass" ] || return 0
 267
 268         xappend "--dhcp-userclass=$networkid,$userclass"
 269
 270         config_get_bool force "$cfg" force 0
 271
 272         dhcp_option_add "$cfg" "$networkid" "$force"
 273 }
 274
 275 dhcp_vendorclass_add() {
 276         local cfg="$1"
 277
 278         config_get networkid "$cfg" networkid
 279         [ -n "$networkid" ] || return 0
 280
 281         config_get vendorclass "$cfg" vendorclass
 282         [ -n "$vendorclass" ] || return 0
 283
 284         xappend "--dhcp-vendorclass=$networkid,$vendorclass"
 285
 286         config_get_bool force "$cfg" force 0
 287
 288         dhcp_option_add "$cfg" "$networkid" "$force"
 289 }
 290
 291 dhcp_host_add() {
 292         local cfg="$1"
 293
 294         config_get_bool force "$cfg" force 0
 295
 296         config_get networkid "$cfg" networkid
 297         [ -n "$networkid" ] && dhcp_option_add "$cfg" "$networkid" "$force"
 298
 299         config_get name "$cfg" name
 300         config_get ip "$cfg" ip
 301         [ -n "$ip" -o -n "$name" ] || return 0
 302
 303         config_get_bool dns "$cfg" dns 0
 304         [ "$dns" = "1" -a -n "$ip" -a -n "$name" ] && {
 305                 echo "$ip $name${DOMAIN:+.$DOMAIN}" >> $HOSTFILE
 306         }
 307
 308         config_get mac "$cfg" mac
 309         if [ -n "$mac" ]; then
 310                 # --dhcp-host=00:20:e0:3b:13:af,192.168.0.199,lap
 311                 macs=""
 312                 for m in $mac; do append macs "$m" ","; done
 313         else
 314                 # --dhcp-host=lap,192.168.0.199
 315                 [ -n "$name" ] || return 0
 316                 macs="$name"
 317                 name=""
 318         fi
 319
 320         config_get tag "$cfg" tag
 321
 322         config_get_bool broadcast "$cfg" broadcast 0
 323         [ "$broadcast" = "0" ] && broadcast=
 324
 325         xappend "--dhcp-host=$macs${networkid:+,net:$networkid}${broadcast:+,set:needs-broadcast}${tag:+,set:$tag}${ip:+,$ip}${name:+,$name}"
 326 }
 327
 328 dhcp_tag_add() {
 329         local cfg="$1"
 330
 331         tag="$cfg"
 332
 333         [ -n "$tag" ] || return 0
 334
 335         config_get_bool force "$cfg" force 0
 336         [ "$force" = "0" ] && force=
 337
 338         config_get option "$cfg" dhcp_option
 339         for o in $option; do
 340                 xappend "--dhcp-option${force:+-force}=tag:$tag,$o"
 341         done
 342 }
 343
 344 dhcp_mac_add() {
 345         local cfg="$1"
 346
 347         config_get networkid "$cfg" networkid
 348         [ -n "$networkid" ] || return 0
 349
 350         config_get mac "$cfg" mac
 351         [ -n "$mac" ] || return 0
 352
 353         xappend "--dhcp-mac=$networkid,$mac"
 354
 355         dhcp_option_add "$cfg" "$networkid"
 356 }
 357
 358 dhcp_boot_add() {
 359         local cfg="$1"
 360
 361         config_get networkid "$cfg" networkid
 362
 363         config_get filename "$cfg" filename
 364         [ -n "$filename" ] || return 0
 365
 366         config_get servername "$cfg" servername
 367         [ -n "$servername" ] || return 0
 368
 369         config_get serveraddress "$cfg" serveraddress
 370         [ -n "$serveraddress" ] || return 0
 371
 372         xappend "--dhcp-boot=${networkid:+net:$networkid,}$filename,$servername,$serveraddress"
 373
 374         config_get_bool force "$cfg" force 0
 375
 376         dhcp_option_add "$cfg" "$networkid" "$force"
 377 }
 378
 379
 380 dhcp_add() {
 381         local cfg="$1"
 382         config_get net "$cfg" interface
 383         [ -n "$net" ] || return 0
 384
 385         config_get dhcpv4 "$cfg" dhcpv4
 386         [ "$dhcpv4" != "disabled" ] || return 0
 387
 388         config_get networkid "$cfg" networkid
 389         [ -n "$networkid" ] || networkid="$net"
 390
 391         network_get_subnet subnet "$net" || return 0
 392         network_get_device ifname "$net" || return 0
 393         network_get_protocol proto "$net" || return 0
 394
 395         [ "$cachelocal" = "0" ] && network_get_dnsserver dnsserver "$net" && {
 396                 DNS_SERVERS="$DNS_SERVERS $dnsserver"
 397         }
 398
 399         append_bool "$cfg" ignore "--no-dhcp-interface=$ifname" && return 0
 400
 401         # Do not support non-static interfaces for now
 402         [ static = "$proto" ] || return 0
 403
 404         # Override interface netmask with dhcp config if applicable
 405         config_get netmask "$cfg" netmask "${subnet##*/}"
 406
 407         #check for an already active dhcp server on the interface, unless 'force' is set
 408         config_get_bool force "$cfg" force 0
 409         [ $force -gt 0 ] || dhcp_check "$ifname" || return 0
 410
 411         config_get start "$cfg" start
 412         config_get limit "$cfg" limit
 413         config_get leasetime "$cfg" leasetime
 414         config_get options "$cfg" options
 415         config_get_bool dynamicdhcp "$cfg" dynamicdhcp 1
 416
 417         leasetime="${leasetime:-12h}"
 418         start="$(dhcp_calc "${start:-100}")"
 419         limit="${limit:-150}"
 420         [ "$limit" -gt 0 ] && limit=$((limit-1))
 421         eval "$(ipcalc.sh "${subnet%%/*}" $netmask $start $limit)"
 422         if [ "$dynamicdhcp" = "0" ]; then END="static"; fi
 423         xappend "--dhcp-range=$networkid,$START,$END,$NETMASK,$leasetime${options:+ $options}"
 424
 425         dhcp_option_add "$cfg" "$networkid"
 426 }
 427
 428 dhcp_option_add() {
 429         local cfg="$1"
 430         local networkid="$2"
 431         local force="$3"
 432
 433         [ "$force" = "0" ] && force=
 434
 435         config_get dhcp_option "$cfg" dhcp_option
 436         for o in $dhcp_option; do
 437                 xappend "--dhcp-option${force:+-force}=${networkid:+$networkid,}$o"
 438         done
 439
 440 }
 441
 442 dhcp_domain_add() {
 443         local cfg="$1"
 444         local ip name names record
 445
 446         config_get names "$cfg" name "$2"
 447         [ -n "$names" ] || return 0
 448
 449         config_get ip "$cfg" ip "$3"
 450         [ -n "$ip" ] || return 0
 451
 452         for name in $names; do
 453                 record="${record:+$record }$name"
 454         done
 455
 456         echo "$ip $record" >> $HOSTFILE
 457 }
 458
 459 dhcp_srv_add() {
 460         local cfg="$1"
 461
 462         config_get srv "$cfg" srv
 463         [ -n "$srv" ] || return 0
 464
 465         config_get target "$cfg" target
 466         [ -n "$target" ] || return 0
 467
 468         config_get port "$cfg" port
 469         [ -n "$port" ] || return 0
 470
 471         config_get class "$cfg" class
 472         config_get weight "$cfg" weight
 473
 474         local service="$srv,$target,$port${class:+,$class${weight:+,$weight}}"
 475
 476         xappend "--srv-host=$service"
 477 }
 478
 479 dhcp_mx_add() {
 480         local cfg="$1"
 481         local domain relay pref
 482
 483         config_get domain "$cfg" domain
 484         [ -n "$domain" ] || return 0
 485
 486         config_get relay "$cfg" relay
 487         [ -n "$relay" ] || return 0
 488
 489         config_get pref "$cfg" pref 0
 490
 491         local service="$domain,$relay,$pref"
 492
 493         xappend "--mx-host=$service"
 494 }
 495
 496 dhcp_cname_add() {
 497         local cfg="$1"
 498         local cname target
 499
 500         config_get cname "$cfg" cname
 501         [ -n "$cname" ] || return 0
 502
 503         config_get target "$cfg" target
 504         [ -n "$target" ] || return 0
 505
 506         xappend "--cname=${cname},${target}"
 507 }
 508
 509 dhcp_hostrecord_add() {
 510         local cfg="$1"
 511         local names addresses record val
 512
 513         config_get names "$cfg" name "$2"
 514         if [ -z "$names" ]; then
 515                 return 0
 516         fi
 517
 518         config_get addresses "$cfg" ip "$3"
 519         if [ -z "$addresses" ]; then
 520                 return 0
 521         fi
 522
 523         for val in $names $addresses; do
 524                 record="${record:+$record,}$val"
 525         done
 526
 527         xappend "--host-record=$record"
 528 }
 529
 530 service_triggers()
 531 {
 532         procd_add_reload_trigger "dhcp"
 533 }
 534
 535 boot() {
 536         # Will be launched through hotplug
 537         return 0
 538 }
 539
 540 start_service() {
 541         include /lib/functions
 542
 543         config_load dhcp
 544
 545         procd_open_instance
 546         procd_set_param command $PROG -C $CONFIGFILE -k
 547         procd_set_param file $CONFIGFILE
 548         procd_set_param respawn
 549         procd_close_instance
 550
 551         # before we can call xappend
 552         mkdir -p $(dirname $CONFIGFILE)
 553
 554         echo "# auto-generated config file from /etc/config/dhcp" > $CONFIGFILE
 555         echo "# auto-generated config file from /etc/config/dhcp" > $HOSTFILE
 556
 557         # if we did this last, we could override auto-generated config
 558         [ -f /etc/dnsmasq.conf ] && {
 559                 xappend "--conf-file=/etc/dnsmasq.conf"
 560         }
 561
 562         args=""
 563         config_foreach dnsmasq dnsmasq
 564         config_foreach dhcp_host_add host
 565         echo >> $CONFIGFILE
 566         config_foreach dhcp_boot_add boot
 567         config_foreach dhcp_mac_add mac
 568         config_foreach dhcp_tag_add tag
 569         config_foreach dhcp_vendorclass_add vendorclass
 570         config_foreach dhcp_userclass_add userclass
 571         config_foreach dhcp_circuitid_add circuitid
 572         config_foreach dhcp_remoteid_add remoteid
 573         config_foreach dhcp_subscrid_add subscrid
 574         config_foreach dhcp_domain_add domain
 575         config_foreach dhcp_hostrecord_add hostrecord
 576
 577         # add own hostname
 578         local lanaddr
 579         [ $ADD_LOCAL_HOSTNAME -eq 1 ] && network_get_ipaddr lanaddr "lan" && {
 580                 local hostname="$(uci_get system @system[0] hostname OpenWrt)"
 581                 dhcp_domain_add "" "$hostname" "$lanaddr"
 582         }
 583
 584         echo >> $CONFIGFILE
 585         config_foreach dhcp_srv_add srvhost
 586         config_foreach dhcp_mx_add mxhost
 587         echo >> $CONFIGFILE
 588
 589         config_get odhcpd_is_active odhcpd maindhcp
 590         if [ "$odhcpd_is_active" != "1" ]; then
 591                 config_foreach dhcp_add dhcp
 592         fi
 593
 594         echo >> $CONFIGFILE
 595         config_foreach dhcp_cname_add cname
 596         echo >> $CONFIGFILE
 597
 598         rm -f /tmp/resolv.conf
 599         [ $ADD_LOCAL_DOMAIN -eq 1 ] && [ -n "$DOMAIN" ] && {
 600                 echo "search $DOMAIN" >> /tmp/resolv.conf
 601         }
 602         DNS_SERVERS="$DNS_SERVERS 127.0.0.1"
 603         for DNS_SERVER in $DNS_SERVERS ; do
 604                 echo "nameserver $DNS_SERVER" >> /tmp/resolv.conf
 605         done
 606 }
 607
 608 reload_service() {
 609         rc_procd start_service "$@"
 610         return 0
 611 }
 612
 613 stop_service() {
 614         [ -f /tmp/resolv.conf ] && {
 615                 rm -f /tmp/resolv.conf
 616                 ln -s /tmp/resolv.conf.auto /tmp/resolv.conf
 617         }
 618         rm -f /var/run/dnsmasq.*.dhcp
 619 }