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