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 TIMESTAMPFILE="/etc/dnsmasq.time"
  19
  20 xappend() {
  21         local value="$1"
  22
  23         echo "${value#--}" >> $CONFIGFILE
  24 }
  25
  26 dhcp_calc() {
  27         local ip="$1"
  28         local res=0
  29
  30         while [ -n "$ip" ]; do
  31                 part="${ip%%.*}"
  32                 res="$(($res * 256))"
  33                 res="$(($res + $part))"
  34                 [ "${ip%.*}" != "$ip" ] && ip="${ip#*.}" || ip=
  35         done
  36         echo "$res"
  37 }
  38
  39 dhcp_check() {
  40         local ifname="$1"
  41         local stamp="/var/run/dnsmasq.$ifname.dhcp"
  42         local rv=0
  43
  44         [ -s "$stamp" ] && return $(cat "$stamp")
  45
  46         udhcpc -n -q -s /bin/true -t 1 -i "$ifname" >&- && rv=1 || rv=0
  47
  48         [ $rv -eq 1 ] && \
  49                 logger -t dnsmasq \
  50                         "found already running DHCP-server on interface '$ifname'" \
  51                         "refusing to start, use 'option force 1' to override"
  52
  53         echo $rv > "$stamp"
  54         return $rv
  55 }
  56
  57 log_once() {
  58         pidof dnsmasq >/dev/null || \
  59                 logger -t dnsmasq "$@"
  60 }
  61
  62 append_bool() {
  63         local section="$1"
  64         local option="$2"
  65         local value="$3"
  66         local _loctmp
  67         config_get_bool _loctmp "$section" "$option" 0
  68         [ $_loctmp -gt 0 ] && xappend "$value"
  69 }
  70
  71 append_parm() {
  72         local section="$1"
  73         local option="$2"
  74         local switch="$3"
  75         local _loctmp
  76         config_get _loctmp "$section" "$option"
  77         [ -z "$_loctmp" ] && return 0
  78         xappend "$switch=$_loctmp"
  79 }
  80
  81 append_server() {
  82         xappend "--server=$1"
  83 }
  84
  85 append_address() {
  86         xappend "--address=$1"
  87 }
  88
  89 append_ipset() {
  90         xappend "--ipset=$1"
  91 }
  92
  93 append_interface() {
  94         local ifname=$(uci_get_state network "$1" ifname "$1")
  95         xappend "--interface=$ifname"
  96 }
  97
  98 append_notinterface() {
  99         local ifname=$(uci_get_state network "$1" ifname "$1")
 100         xappend "--except-interface=$ifname"
 101 }
 102
 103 append_addnhosts() {
 104         xappend "--addn-hosts=$1"
 105 }
 106
 107 append_bogusnxdomain() {
 108         xappend "--bogus-nxdomain=$1"
 109 }
 110
 111 append_pxe_service() {
 112         xappend "--pxe-service=$1"
 113 }
 114
 115 dnsmasq() {
 116         local cfg="$1"
 117         append_bool "$cfg" authoritative "--dhcp-authoritative"
 118         append_bool "$cfg" nodaemon "--no-daemon"
 119         append_bool "$cfg" domainneeded "--domain-needed"
 120         append_bool "$cfg" filterwin2k "--filterwin2k"
 121         append_bool "$cfg" nohosts "--no-hosts"
 122         append_bool "$cfg" nonegcache "--no-negcache"
 123         append_bool "$cfg" strictorder "--strict-order"
 124         append_bool "$cfg" logqueries "--log-queries=extra"
 125         append_bool "$cfg" noresolv "--no-resolv"
 126         append_bool "$cfg" localise_queries "--localise-queries"
 127         append_bool "$cfg" readethers "--read-ethers"
 128         append_bool "$cfg" dbus "--enable-dbus"
 129         append_bool "$cfg" boguspriv "--bogus-priv"
 130         append_bool "$cfg" expandhosts "--expand-hosts"
 131         append_bool "$cfg" enable_tftp "--enable-tftp"
 132         append_bool "$cfg" tftp_no_fail "--tftp-no-fail"
 133         append_bool "$cfg" nonwildcard "--bind-interfaces"
 134         append_bool "$cfg" fqdn "--dhcp-fqdn"
 135         append_bool "$cfg" proxydnssec "--proxy-dnssec"
 136         append_bool "$cfg" localservice "--local-service"
 137         append_bool "$cfg" quietdhcp "--quiet-dhcp"
 138         append_bool "$cfg" sequential_ip "--dhcp-sequential-ip"
 139
 140         append_parm "$cfg" dhcpscript "--dhcp-script"
 141         append_parm "$cfg" cachesize "--cache-size"
 142         append_parm "$cfg" dnsforwardmax "--dns-forward-max"
 143         append_parm "$cfg" port "--port"
 144         append_parm "$cfg" ednspacket_max "--edns-packet-max"
 145         append_parm "$cfg" dhcpleasemax "--dhcp-lease-max"
 146         append_parm "$cfg" "queryport" "--query-port"
 147         append_parm "$cfg" "domain" "--domain"
 148         append_parm "$cfg" "local" "--server"
 149         config_list_foreach "$cfg" "server" append_server
 150         config_list_foreach "$cfg" "address" append_address
 151         config_list_foreach "$cfg" "ipset" append_ipset
 152         config_list_foreach "$cfg" "interface" append_interface
 153         config_list_foreach "$cfg" "notinterface" append_notinterface
 154         config_list_foreach "$cfg" "addnhosts" append_addnhosts
 155         config_list_foreach "$cfg" "bogusnxdomain" append_bogusnxdomain
 156         append_parm "$cfg" "leasefile" "--dhcp-leasefile"
 157         append_parm "$cfg" "resolvfile" "--resolv-file"
 158         append_parm "$cfg" "serversfile" "--servers-file"
 159         append_parm "$cfg" "tftp_root" "--tftp-root"
 160         append_parm "$cfg" "dhcp_boot" "--dhcp-boot"
 161         append_parm "$cfg" "local_ttl" "--local-ttl"
 162         append_parm "$cfg" "pxe_prompt" "--pxe-prompt"
 163         config_list_foreach "$cfg" "pxe_service" append_pxe_service
 164         config_get DOMAIN "$cfg" domain
 165
 166         config_get_bool ADD_LOCAL_DOMAIN "$cfg" add_local_domain 1
 167         config_get_bool ADD_LOCAL_HOSTNAME "$cfg" add_local_hostname 1
 168
 169         config_get_bool readethers "$cfg" readethers
 170         [ "$readethers" = "1" -a \! -e "/etc/ethers" ] && touch /etc/ethers
 171
 172         config_get leasefile $cfg leasefile
 173         [ -n "$leasefile" -a \! -e "$leasefile" ] && touch "$leasefile"
 174         config_get_bool cachelocal "$cfg" cachelocal 1
 175
 176         config_get hostsfile "$cfg" dhcphostsfile
 177         [ -e "$hostsfile" ] && xappend "--dhcp-hostsfile=$hostsfile"
 178
 179         local rebind
 180         config_get_bool rebind "$cfg" rebind_protection 1
 181         [ $rebind -gt 0 ] && {
 182                 log_once \
 183                         "DNS rebinding protection is active," \
 184                         "will discard upstream RFC1918 responses!"
 185                 xappend "--stop-dns-rebind"
 186
 187                 local rebind_localhost
 188                 config_get_bool rebind_localhost "$cfg" rebind_localhost 0
 189                 [ $rebind_localhost -gt 0 ] && {
 190                         log_once "Allowing 127.0.0.0/8 responses"
 191                         xappend "--rebind-localhost-ok"
 192                 }
 193
 194                 append_rebind_domain() {
 195                         log_once "Allowing RFC1918 responses for domain $1"
 196                         xappend "--rebind-domain-ok=$1"
 197                 }
 198
 199                 config_list_foreach "$cfg" rebind_domain append_rebind_domain
 200         }
 201
 202         config_get_bool dnssec "$cfg" dnssec 0
 203         [ "$dnssec" -gt 0 ] && {
 204                 xappend "--conf-file=$TRUSTANCHORSFILE"
 205                 xappend "--dnssec"
 206                 xappend "--dnssec-timestamp=$TIMESTAMPFILE"
 207                 append_bool "$cfg" dnsseccheckunsigned "--dnssec-check-unsigned"
 208         }
 209
 210         dhcp_option_add "$cfg" "" 0
 211
 212         xappend "--dhcp-broadcast=tag:needs-broadcast"
 213
 214         mkdir -p /tmp/hosts /tmp/dnsmasq.d
 215         xappend "--addn-hosts=/tmp/hosts"
 216         xappend "--conf-dir=/tmp/dnsmasq.d"
 217
 218         echo >> $CONFIGFILE
 219 }
 220
 221 dhcp_subscrid_add() {
 222         local cfg="$1"
 223
 224         config_get networkid "$cfg" networkid
 225         [ -n "$networkid" ] || return 0
 226
 227         config_get subscriberid "$cfg" subscriberid
 228         [ -n "$subscriberid" ] || return 0
 229
 230         xappend "--dhcp-subscrid=$networkid,$subscriberid"
 231
 232         config_get_bool force "$cfg" force 0
 233
 234         dhcp_option_add "$cfg" "$networkid" "$force"
 235 }
 236
 237 dhcp_remoteid_add() {
 238         local cfg="$1"
 239
 240         config_get networkid "$cfg" networkid
 241         [ -n "$networkid" ] || return 0
 242
 243         config_get remoteid "$cfg" remoteid
 244         [ -n "$remoteid" ] || return 0
 245
 246         xappend "--dhcp-remoteid=$networkid,$remoteid"
 247
 248         config_get_bool force "$cfg" force 0
 249
 250         dhcp_option_add "$cfg" "$networkid" "$force"
 251 }
 252
 253 dhcp_circuitid_add() {
 254         local cfg="$1"
 255
 256         config_get networkid "$cfg" networkid
 257         [ -n "$networkid" ] || return 0
 258
 259         config_get circuitid "$cfg" circuitid
 260         [ -n "$circuitid" ] || return 0
 261
 262         xappend "--dhcp-circuitid=$networkid,$circuitid"
 263
 264         config_get_bool force "$cfg" force 0
 265
 266         dhcp_option_add "$cfg" "$networkid" "$force"
 267 }
 268
 269 dhcp_userclass_add() {
 270         local cfg="$1"
 271
 272         config_get networkid "$cfg" networkid
 273         [ -n "$networkid" ] || return 0
 274
 275         config_get userclass "$cfg" userclass
 276         [ -n "$userclass" ] || return 0
 277
 278         xappend "--dhcp-userclass=$networkid,$userclass"
 279
 280         config_get_bool force "$cfg" force 0
 281
 282         dhcp_option_add "$cfg" "$networkid" "$force"
 283 }
 284
 285 dhcp_vendorclass_add() {
 286         local cfg="$1"
 287
 288         config_get networkid "$cfg" networkid
 289         [ -n "$networkid" ] || return 0
 290
 291         config_get vendorclass "$cfg" vendorclass
 292         [ -n "$vendorclass" ] || return 0
 293
 294         xappend "--dhcp-vendorclass=$networkid,$vendorclass"
 295
 296         config_get_bool force "$cfg" force 0
 297
 298         dhcp_option_add "$cfg" "$networkid" "$force"
 299 }
 300
 301 dhcp_host_add() {
 302         local cfg="$1"
 303
 304         config_get_bool force "$cfg" force 0
 305
 306         config_get networkid "$cfg" networkid
 307         [ -n "$networkid" ] && dhcp_option_add "$cfg" "$networkid" "$force"
 308
 309         config_get name "$cfg" name
 310         config_get ip "$cfg" ip
 311         [ -n "$ip" -o -n "$name" ] || return 0
 312
 313         config_get_bool dns "$cfg" dns 0
 314         [ "$dns" = "1" -a -n "$ip" -a -n "$name" ] && {
 315                 echo "$ip $name${DOMAIN:+.$DOMAIN}" >> $HOSTFILE
 316         }
 317
 318         config_get mac "$cfg" mac
 319         if [ -n "$mac" ]; then
 320                 # --dhcp-host=00:20:e0:3b:13:af,192.168.0.199,lap
 321                 macs=""
 322                 for m in $mac; do append macs "$m" ","; done
 323         else
 324                 # --dhcp-host=lap,192.168.0.199
 325                 [ -n "$name" ] || return 0
 326                 macs="$name"
 327                 name=""
 328         fi
 329
 330         config_get tag "$cfg" tag
 331
 332         config_get_bool broadcast "$cfg" broadcast 0
 333         [ "$broadcast" = "0" ] && broadcast=
 334
 335         xappend "--dhcp-host=$macs${networkid:+,net:$networkid}${broadcast:+,set:needs-broadcast}${tag:+,set:$tag}${ip:+,$ip}${name:+,$name}"
 336 }
 337
 338 dhcp_tag_add() {
 339         local cfg="$1"
 340
 341         tag="$cfg"
 342
 343         [ -n "$tag" ] || return 0
 344
 345         config_get_bool force "$cfg" force 0
 346         [ "$force" = "0" ] && force=
 347
 348         config_get option "$cfg" dhcp_option
 349         for o in $option; do
 350                 xappend "--dhcp-option${force:+-force}=tag:$tag,$o"
 351         done
 352 }
 353
 354 dhcp_mac_add() {
 355         local cfg="$1"
 356
 357         config_get networkid "$cfg" networkid
 358         [ -n "$networkid" ] || return 0
 359
 360         config_get mac "$cfg" mac
 361         [ -n "$mac" ] || return 0
 362
 363         xappend "--dhcp-mac=$networkid,$mac"
 364
 365         dhcp_option_add "$cfg" "$networkid"
 366 }
 367
 368 dhcp_boot_add() {
 369         local cfg="$1"
 370
 371         config_get networkid "$cfg" networkid
 372
 373         config_get filename "$cfg" filename
 374         [ -n "$filename" ] || return 0
 375
 376         config_get servername "$cfg" servername
 377         config_get serveraddress "$cfg" serveraddress
 378
 379         [ -n "$serveraddress" -a ! -n "$servername" ] && return 0
 380
 381         xappend "--dhcp-boot=${networkid:+net:$networkid,}${filename}${servername:+,$servername}${serveraddress:+,$serveraddress}"
 382
 383         config_get_bool force "$cfg" force 0
 384
 385         dhcp_option_add "$cfg" "$networkid" "$force"
 386 }
 387
 388
 389 dhcp_add() {
 390         local cfg="$1"
 391         config_get net "$cfg" interface
 392         [ -n "$net" ] || return 0
 393
 394         config_get dhcpv4 "$cfg" dhcpv4
 395         [ "$dhcpv4" != "disabled" ] || return 0
 396
 397         config_get networkid "$cfg" networkid
 398         [ -n "$networkid" ] || networkid="$net"
 399
 400         network_get_subnet subnet "$net" || return 0
 401         network_get_device ifname "$net" || return 0
 402         network_get_protocol proto "$net" || return 0
 403
 404         [ "$cachelocal" = "0" ] && network_get_dnsserver dnsserver "$net" && {
 405                 DNS_SERVERS="$DNS_SERVERS $dnsserver"
 406         }
 407
 408         append_bool "$cfg" ignore "--no-dhcp-interface=$ifname" && return 0
 409
 410         # Do not support non-static interfaces for now
 411         [ static = "$proto" ] || return 0
 412
 413         # Override interface netmask with dhcp config if applicable
 414         config_get netmask "$cfg" netmask "${subnet##*/}"
 415
 416         #check for an already active dhcp server on the interface, unless 'force' is set
 417         config_get_bool force "$cfg" force 0
 418         [ $force -gt 0 ] || dhcp_check "$ifname" || return 0
 419
 420         config_get start "$cfg" start
 421         config_get limit "$cfg" limit
 422         config_get leasetime "$cfg" leasetime
 423         config_get options "$cfg" options
 424         config_get_bool dynamicdhcp "$cfg" dynamicdhcp 1
 425
 426         leasetime="${leasetime:-12h}"
 427         start="$(dhcp_calc "${start:-100}")"
 428         limit="${limit:-150}"
 429         [ "$limit" -gt 0 ] && limit=$((limit-1))
 430         eval "$(ipcalc.sh "${subnet%%/*}" $netmask $start $limit)"
 431         if [ "$dynamicdhcp" = "0" ]; then END="static"; fi
 432         xappend "--dhcp-range=$networkid,$START,$END,$NETMASK,$leasetime${options:+ $options}"
 433
 434         dhcp_option_add "$cfg" "$networkid"
 435 }
 436
 437 dhcp_option_add() {
 438         local cfg="$1"
 439         local networkid="$2"
 440         local force="$3"
 441
 442         [ "$force" = "0" ] && force=
 443
 444         config_get dhcp_option "$cfg" dhcp_option
 445         for o in $dhcp_option; do
 446                 xappend "--dhcp-option${force:+-force}=${networkid:+$networkid,}$o"
 447         done
 448
 449 }
 450
 451 dhcp_domain_add() {
 452         local cfg="$1"
 453         local ip name names record
 454
 455         config_get names "$cfg" name "$2"
 456         [ -n "$names" ] || return 0
 457
 458         config_get ip "$cfg" ip "$3"
 459         [ -n "$ip" ] || return 0
 460
 461         for name in $names; do
 462                 record="${record:+$record }$name"
 463         done
 464
 465         echo "$ip $record" >> $HOSTFILE
 466 }
 467
 468 dhcp_srv_add() {
 469         local cfg="$1"
 470
 471         config_get srv "$cfg" srv
 472         [ -n "$srv" ] || return 0
 473
 474         config_get target "$cfg" target
 475         [ -n "$target" ] || return 0
 476
 477         config_get port "$cfg" port
 478         [ -n "$port" ] || return 0
 479
 480         config_get class "$cfg" class
 481         config_get weight "$cfg" weight
 482
 483         local service="$srv,$target,$port${class:+,$class${weight:+,$weight}}"
 484
 485         xappend "--srv-host=$service"
 486 }
 487
 488 dhcp_mx_add() {
 489         local cfg="$1"
 490         local domain relay pref
 491
 492         config_get domain "$cfg" domain
 493         [ -n "$domain" ] || return 0
 494
 495         config_get relay "$cfg" relay
 496         [ -n "$relay" ] || return 0
 497
 498         config_get pref "$cfg" pref 0
 499
 500         local service="$domain,$relay,$pref"
 501
 502         xappend "--mx-host=$service"
 503 }
 504
 505 dhcp_cname_add() {
 506         local cfg="$1"
 507         local cname target
 508
 509         config_get cname "$cfg" cname
 510         [ -n "$cname" ] || return 0
 511
 512         config_get target "$cfg" target
 513         [ -n "$target" ] || return 0
 514
 515         xappend "--cname=${cname},${target}"
 516 }
 517
 518 dhcp_hostrecord_add() {
 519         local cfg="$1"
 520         local names addresses record val
 521
 522         config_get names "$cfg" name "$2"
 523         if [ -z "$names" ]; then
 524                 return 0
 525         fi
 526
 527         config_get addresses "$cfg" ip "$3"
 528         if [ -z "$addresses" ]; then
 529                 return 0
 530         fi
 531
 532         for val in $names $addresses; do
 533                 record="${record:+$record,}$val"
 534         done
 535
 536         xappend "--host-record=$record"
 537 }
 538
 539 service_triggers()
 540 {
 541         procd_add_reload_trigger "dhcp"
 542 }
 543
 544 boot() {
 545         # Will be launched through hotplug
 546         return 0
 547 }
 548
 549 start_service() {
 550         include /lib/functions
 551
 552         config_load dhcp
 553
 554         procd_open_instance
 555         procd_set_param command $PROG -C $CONFIGFILE -k -x /var/run/dnsmasq/dnsmasq.pid
 556         procd_set_param file $CONFIGFILE
 557         procd_set_param respawn
 558
 559         procd_add_jail dnsmasq ubus log
 560         procd_add_jail_mount $CONFIGFILE $TRUSTANCHORSFILE $HOSTFILE /etc/passwd /etc/group /etc/TZ /dev/null /dev/urandom /etc/dnsmasq.conf /tmp/dnsmasq.d /tmp/resolv.conf.auto /etc/hosts /etc/ethers
 561         procd_add_jail_mount_rw /var/run/dnsmasq/ /tmp/dhcp.leases $TIMESTAMPFILE
 562
 563         procd_close_instance
 564
 565         # before we can call xappend
 566         mkdir -p /var/run/dnsmasq/
 567         mkdir -p $(dirname $CONFIGFILE)
 568         mkdir -p /var/lib/misc
 569         touch /tmp/dhcp.leases
 570
 571         if [ ! -f "$TIMESTAMPFILE" ]; then
 572                 touch "$TIMESTAMPFILE"
 573                 chown nobody.nogroup "$TIMESTAMPFILE"
 574         fi
 575
 576         echo "# auto-generated config file from /etc/config/dhcp" > $CONFIGFILE
 577         echo "# auto-generated config file from /etc/config/dhcp" > $HOSTFILE
 578
 579         # if we did this last, we could override auto-generated config
 580         [ -f /etc/dnsmasq.conf ] && {
 581                 xappend "--conf-file=/etc/dnsmasq.conf"
 582         }
 583
 584         args=""
 585         config_foreach dnsmasq dnsmasq
 586         config_foreach dhcp_host_add host
 587         echo >> $CONFIGFILE
 588         config_foreach dhcp_boot_add boot
 589         config_foreach dhcp_mac_add mac
 590         config_foreach dhcp_tag_add tag
 591         config_foreach dhcp_vendorclass_add vendorclass
 592         config_foreach dhcp_userclass_add userclass
 593         config_foreach dhcp_circuitid_add circuitid
 594         config_foreach dhcp_remoteid_add remoteid
 595         config_foreach dhcp_subscrid_add subscrid
 596         config_foreach dhcp_domain_add domain
 597         config_foreach dhcp_hostrecord_add hostrecord
 598
 599         # add own hostname
 600         local lanaddr
 601         [ $ADD_LOCAL_HOSTNAME -eq 1 ] && network_get_ipaddr lanaddr "lan" && {
 602                 local hostname="$(uci_get system @system[0] hostname OpenWrt)"
 603                 dhcp_domain_add "" "$hostname" "$lanaddr"
 604         }
 605
 606         echo >> $CONFIGFILE
 607         config_foreach dhcp_srv_add srvhost
 608         config_foreach dhcp_mx_add mxhost
 609         echo >> $CONFIGFILE
 610
 611         config_get odhcpd_is_active odhcpd maindhcp
 612         if [ "$odhcpd_is_active" != "1" ]; then
 613                 config_foreach dhcp_add dhcp
 614         fi
 615
 616         echo >> $CONFIGFILE
 617         config_foreach dhcp_cname_add cname
 618         echo >> $CONFIGFILE
 619
 620         rm -f /tmp/resolv.conf
 621         [ $ADD_LOCAL_DOMAIN -eq 1 ] && [ -n "$DOMAIN" ] && {
 622                 echo "search $DOMAIN" >> /tmp/resolv.conf
 623         }
 624         DNS_SERVERS="$DNS_SERVERS 127.0.0.1"
 625         for DNS_SERVER in $DNS_SERVERS ; do
 626                 echo "nameserver $DNS_SERVER" >> /tmp/resolv.conf
 627         done
 628 }
 629
 630 reload_service() {
 631         rc_procd start_service "$@"
 632         return 0
 633 }
 634
 635 stop_service() {
 636         [ -f /tmp/resolv.conf ] && {
 637                 rm -f /tmp/resolv.conf
 638                 ln -s /tmp/resolv.conf.auto /tmp/resolv.conf
 639         }
 640         rm -f /var/run/dnsmasq.*.dhcp
 641 }