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