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         echo >> $CONFIGFILE
 167 }
 168
 169 dhcp_subscrid_add() {
 170         local cfg="$1"
 171
 172         config_get networkid "$cfg" networkid
 173         [ -n "$networkid" ] || return 0
 174
 175         config_get subscriberid "$cfg" subscriberid
 176         [ -n "$subscriberid" ] || return 0
 177
 178         xappend "--dhcp-subscrid=$networkid,$subscriberid"
 179
 180         config_get_bool force "$cfg" force 0
 181
 182         dhcp_option_add "$cfg" "$networkid" "$force"
 183 }
 184
 185 dhcp_remoteid_add() {
 186         local cfg="$1"
 187
 188         config_get networkid "$cfg" networkid
 189         [ -n "$networkid" ] || return 0
 190
 191         config_get remoteid "$cfg" remoteid
 192         [ -n "$remoteid" ] || return 0
 193
 194         xappend "--dhcp-remoteid=$networkid,$remoteid"
 195
 196         config_get_bool force "$cfg" force 0
 197
 198         dhcp_option_add "$cfg" "$networkid" "$force"
 199 }
 200
 201 dhcp_circuitid_add() {
 202         local cfg="$1"
 203
 204         config_get networkid "$cfg" networkid
 205         [ -n "$networkid" ] || return 0
 206
 207         config_get circuitid "$cfg" circuitid
 208         [ -n "$circuitid" ] || return 0
 209
 210         xappend "--dhcp-circuitid=$networkid,$circuitid"
 211
 212         config_get_bool force "$cfg" force 0
 213
 214         dhcp_option_add "$cfg" "$networkid" "$force"
 215 }
 216
 217 dhcp_userclass_add() {
 218         local cfg="$1"
 219
 220         config_get networkid "$cfg" networkid
 221         [ -n "$networkid" ] || return 0
 222
 223         config_get userclass "$cfg" userclass
 224         [ -n "$userclass" ] || return 0
 225
 226         xappend "--dhcp-userclass=$networkid,$userclass"
 227
 228         config_get_bool force "$cfg" force 0
 229
 230         dhcp_option_add "$cfg" "$networkid" "$force"
 231 }
 232
 233 dhcp_vendorclass_add() {
 234         local cfg="$1"
 235
 236         config_get networkid "$cfg" networkid
 237         [ -n "$networkid" ] || return 0
 238
 239         config_get vendorclass "$cfg" vendorclass
 240         [ -n "$vendorclass" ] || return 0
 241
 242         xappend "--dhcp-vendorclass=$networkid,$vendorclass"
 243
 244         config_get_bool force "$cfg" force 0
 245
 246         dhcp_option_add "$cfg" "$networkid" "$force"
 247 }
 248
 249 dhcp_host_add() {
 250         local cfg="$1"
 251
 252         config_get_bool force "$cfg" force 0
 253
 254         config_get networkid "$cfg" networkid
 255         [ -n "$networkid" ] && dhcp_option_add "$cfg" "$networkid" "$force"
 256
 257         config_get name "$cfg" name
 258         config_get ip "$cfg" ip
 259         [ -n "$ip" -o -n "$name" ] || return 0
 260
 261         config_get mac "$cfg" mac
 262         [ -z "$mac" ] && {
 263                 [ -n "$name" ] || return 0
 264                 mac="$name"
 265                 name=""
 266         }
 267
 268         macs=""
 269         for m in $mac; do append macs "$m" ","; done
 270
 271         config_get tag "$cfg" tag
 272
 273         xappend "--dhcp-host=$macs${networkid:+,net:$networkid}${tag:+,set:$tag}${ip:+,$ip}${name:+,$name}"
 274 }
 275
 276 dhcp_tag_add() {
 277         local cfg="$1"
 278
 279         tag="$cfg"
 280
 281         [ -n "$tag" ] || return 0
 282
 283         config_get_bool force "$cfg" force 0
 284         [ "$force" = "0" ] && force=
 285
 286         config_get option "$cfg" dhcp_option
 287         for o in $option; do
 288                 xappend "--dhcp-option${force:+-force}=tag:$tag,$o"
 289         done
 290 }
 291
 292 dhcp_mac_add() {
 293         local cfg="$1"
 294
 295         config_get networkid "$cfg" networkid
 296         [ -n "$networkid" ] || return 0
 297
 298         config_get mac "$cfg" mac
 299         [ -n "$mac" ] || return 0
 300
 301         xappend "--dhcp-mac=$networkid,$mac"
 302
 303         dhcp_option_add "$cfg" "$networkid"
 304 }
 305
 306 dhcp_boot_add() {
 307         local cfg="$1"
 308
 309         config_get networkid "$cfg" networkid
 310
 311         config_get filename "$cfg" filename
 312         [ -n "$filename" ] || return 0
 313
 314         config_get servername "$cfg" servername
 315         [ -n "$servername" ] || return 0
 316
 317         config_get serveraddress "$cfg" serveraddress
 318         [ -n "$serveraddress" ] || return 0
 319
 320         xappend "--dhcp-boot=${networkid:+net:$networkid,}$filename,$servername,$serveraddress"
 321
 322         config_get_bool force "$cfg" force 0
 323
 324         dhcp_option_add "$cfg" "$networkid" "$force"
 325 }
 326
 327
 328 dhcp_add() {
 329         local cfg="$1"
 330         config_get net "$cfg" interface
 331         [ -n "$net" ] || return 0
 332
 333         config_get networkid "$cfg" networkid
 334         [ -n "$networkid" ] || networkid="$net"
 335
 336         config_get ifname "$net" ifname
 337         [ -n "$ifname" ] || return 0
 338
 339         config_get dnsserver "$net" dns
 340         [ "$cachelocal" = "0" -a -n "$dnsserver" ] && {
 341                 DNS_SERVERS="$DNS_SERVERS $dnsserver"
 342         }
 343
 344         append_bool "$cfg" ignore "--no-dhcp-interface=$ifname" && return 0
 345
 346         config_get proto "$net" proto
 347         [ static = "$proto" ] || return 0
 348
 349         config_get ipaddr "$net" ipaddr
 350         config_get netmask "$cfg" netmask
 351         [ -n "$netmask" ] || config_get netmask "$net" netmask
 352
 353         #check for an already active dhcp server on the interface, unless 'force' is set
 354         config_get_bool force "$cfg" force 0
 355         [ $force -gt 0 ] || {
 356                 udhcpc -n -q -s /bin/true -t 1 -i $ifname >&- && {
 357                         logger -t dnsmasq \
 358                                 "found already running DHCP-server on interface '$ifname'" \
 359                                 "refusing to start, use 'option force 1' to override"
 360                         return 0
 361                 }
 362         }
 363
 364         config_get start "$cfg" start
 365         config_get limit "$cfg" limit
 366         config_get leasetime "$cfg" leasetime
 367         config_get options "$cfg" options
 368         config_get_bool dynamicdhcp "$cfg" dynamicdhcp 1
 369
 370         leasetime="${leasetime:-12h}"
 371         start="$(dhcp_calc "${start:-100}")"
 372         limit="${limit:-150}"
 373         [ "$limit" -gt 0 ] && limit=$((limit-1))
 374         eval "$(ipcalc.sh $ipaddr $netmask $start $limit)"
 375         if [ "$dynamicdhcp" = "0" ]; then END="static"; fi
 376         xappend "--dhcp-range=$networkid,$START,$END,$NETMASK,$leasetime${options:+ $options}"
 377
 378         dhcp_option_add "$cfg" "$networkid"
 379 }
 380
 381 dhcp_option_add() {
 382         local cfg="$1"
 383         local networkid="$2"
 384         local force="$3"
 385
 386         [ "$force" = "0" ] && force=
 387
 388         config_get dhcp_option "$cfg" dhcp_option
 389         for o in $dhcp_option; do
 390                 xappend "--dhcp-option${force:+-force}=${networkid:+$networkid,}$o"
 391         done
 392
 393 }
 394
 395 dhcp_domain_add() {
 396         local cfg="$1"
 397         local ip name names record
 398
 399         config_get names "$cfg" name "$2"
 400         [ -n "$names" ] || return 0
 401
 402         config_get ip "$cfg" ip "$3"
 403         [ -n "$ip" ] || return 0
 404
 405         for name in $names; do
 406                 record="${record:+$record/}$name"
 407         done
 408
 409         xappend "--address=/$record/$ip"
 410 }
 411
 412 dhcp_srv_add() {
 413         local cfg="$1"
 414
 415         config_get srv "$cfg" srv
 416         [ -n "$srv" ] || return 0
 417
 418         config_get target "$cfg" target
 419         [ -n "$target" ] || return 0
 420
 421         config_get port "$cfg" port
 422         [ -n "$port" ] || return 0
 423
 424         config_get class "$cfg" class
 425         config_get weight "$cfg" weight
 426
 427         local service="$srv,$target,$port${class:+,$class${weight:+,$weight}}"
 428
 429         xappend "--srv-host=$service"
 430 }
 431
 432 dhcp_mx_add() {
 433         local cfg="$1"
 434         local domain relay pref
 435
 436         config_get domain "$cfg" domain
 437         [ -n "$domain" ] || return 0
 438
 439         config_get relay "$cfg" relay
 440         [ -n "$relay" ] || return 0
 441
 442         config_get pref "$cfg" pref 0
 443
 444         local service="$domain,$relay,$pref"
 445
 446         xappend "--mx-host=$service"
 447 }
 448
 449 dhcp_cname_add() {
 450         local cfg="$1"
 451         local cname target
 452
 453         config_get cname "$cfg" cname
 454         [ -n "$cname" ] || return 0
 455
 456         config_get target "$cfg" target
 457         [ -n "$target" ] || return 0
 458
 459         xappend "--cname=${cname},${target}"
 460 }
 461
 462 dhcp_hostrecord_add() {
 463         local cfg="$1"
 464         local names addresses record val
 465
 466         config_get names "$cfg" name "$2"
 467         if [ -z "$names" ]; then
 468                 return 0
 469         fi
 470
 471         config_get addresses "$cfg" ip "$3"
 472         if [ -z "$addresses" ]; then
 473                 return 0
 474         fi
 475
 476         for val in $names $addresses; do
 477                 record="${record:+$record,}$val"
 478         done
 479
 480         xappend "--host-record=$record"
 481 }
 482
 483 service_triggers()
 484 {
 485         procd_add_reload_trigger "dhcp"
 486 }
 487
 488 start_service() {
 489         include /lib/network
 490         scan_interfaces
 491
 492         local lanaddr
 493         config_get lanaddr "lan" ipaddr
 494
 495         config_load dhcp
 496
 497         procd_open_instance
 498         procd_set_param command $PROG -C $CONFIGFILE -k
 499         procd_close_instance
 500
 501         # before we can call xappend
 502         mkdir -p $(dirname $CONFIGFILE)
 503
 504         echo "# auto-generated config file from /etc/config/dhcp" > $CONFIGFILE
 505
 506         # if we did this last, we could override auto-generated config
 507         [ -f /etc/dnsmasq.conf ] && {
 508                 xappend "--conf-file=/etc/dnsmasq.conf"
 509         }
 510
 511         args=""
 512         config_foreach dnsmasq dnsmasq
 513         config_foreach dhcp_host_add host
 514         echo >> $CONFIGFILE
 515         config_foreach dhcp_boot_add boot
 516         config_foreach dhcp_mac_add mac
 517         config_foreach dhcp_tag_add tag
 518         config_foreach dhcp_vendorclass_add vendorclass
 519         config_foreach dhcp_userclass_add userclass
 520         config_foreach dhcp_circuitid_add circuitid
 521         config_foreach dhcp_remoteid_add remoteid
 522         config_foreach dhcp_subscrid_add subscrid
 523         config_foreach dhcp_domain_add domain
 524         config_foreach dhcp_hostrecord_add hostrecord
 525
 526         # add own hostname
 527         [ $ADD_LOCAL_HOSTNAME -eq 1 ] && [ -n "$lanaddr" ] && {
 528                 local hostname="$(uci_get system @system[0] hostname OpenWrt)"
 529                 dhcp_hostrecord_add "" "$hostname${DOMAIN:+.$DOMAIN $hostname}" "$lanaddr"
 530         }
 531
 532         echo >> $CONFIGFILE
 533         config_foreach dhcp_srv_add srvhost
 534         config_foreach dhcp_mx_add mxhost
 535         echo >> $CONFIGFILE
 536         config_foreach dhcp_add dhcp
 537         echo >> $CONFIGFILE
 538         config_foreach dhcp_cname_add cname
 539         echo >> $CONFIGFILE
 540
 541         rm -f /tmp/resolv.conf
 542         [ $ADD_LOCAL_DOMAIN -eq 1 ] && [ -n "$DOMAIN" ] && {
 543                 echo "search $DOMAIN" >> /tmp/resolv.conf
 544         }
 545         DNS_SERVERS="$DNS_SERVERS 127.0.0.1"
 546         for DNS_SERVER in $DNS_SERVERS ; do
 547                 echo "nameserver $DNS_SERVER" >> /tmp/resolv.conf
 548         done
 549 }
 550
 551 stop_service() {
 552         [ -f /tmp/resolv.conf ] && {
 553                 rm -f /tmp/resolv.conf
 554                 ln -s /tmp/resolv.conf.auto /tmp/resolv.conf
 555         }
 556 }