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