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 SERVICE_USE_PID=1
   7
   8 DNS_SERVERS=""
   9 DOMAIN=""
  10
  11 ADD_LOCAL_DOMAIN=1
  12 ADD_LOCAL_HOSTNAME=1
  13
  14 CONFIGFILE="/var/etc/dnsmasq.conf"
  15
  16 xappend() {
  17         local value="$1"
  18
  19         echo "${value#--}" >> $CONFIGFILE
  20 }
  21
  22 dhcp_calc() {
  23         local ip="$1"
  24         local res=0
  25
  26         while [ -n "$ip" ]; do
  27                 part="${ip%%.*}"
  28                 res="$(($res * 256))"
  29                 res="$(($res + $part))"
  30                 [ "${ip%.*}" != "$ip" ] && ip="${ip#*.}" || ip=
  31         done
  32         echo "$res"
  33 }
  34
  35 append_bool() {
  36         local section="$1"
  37         local option="$2"
  38         local value="$3"
  39         local _loctmp
  40         config_get_bool _loctmp "$section" "$option" 0
  41         [ $_loctmp -gt 0 ] && xappend "$value"
  42 }
  43
  44 append_parm() {
  45         local section="$1"
  46         local option="$2"
  47         local switch="$3"
  48         local _loctmp
  49         config_get _loctmp "$section" "$option"
  50         [ -z "$_loctmp" ] && return 0
  51         xappend "$switch=$_loctmp"
  52 }
  53
  54 append_server() {
  55         xappend "--server=$1"
  56 }
  57
  58 append_address() {
  59         xappend "--address=$1"
  60 }
  61
  62 append_interface() {
  63         local ifname=$(uci_get_state network "$1" ifname "$1")
  64         xappend "--interface=$ifname"
  65 }
  66
  67 append_notinterface() {
  68         local ifname=$(uci_get_state network "$1" ifname "$1")
  69         xappend "--except-interface=$ifname"
  70 }
  71
  72 append_addnhosts() {
  73         xappend "--addn-hosts=$1"
  74 }
  75
  76 append_bogusnxdomain() {
  77        xappend "--bogus-nxdomain=$1"
  78 }
  79
  80 dnsmasq() {
  81         local cfg="$1"
  82         append_bool "$cfg" authoritative "--dhcp-authoritative"
  83         append_bool "$cfg" nodaemon "--no-daemon"
  84         append_bool "$cfg" domainneeded "--domain-needed"
  85         append_bool "$cfg" filterwin2k "--filterwin2k"
  86         append_bool "$cfg" nohosts "--no-hosts"
  87         append_bool "$cfg" nonegcache "--no-negcache"
  88         append_bool "$cfg" strictorder "--strict-order"
  89         append_bool "$cfg" logqueries "--log-queries"
  90         append_bool "$cfg" noresolv "--no-resolv"
  91         append_bool "$cfg" localise_queries "--localise-queries"
  92         append_bool "$cfg" readethers "--read-ethers"
  93         append_bool "$cfg" dbus "--enable-dbus"
  94         append_bool "$cfg" boguspriv "--bogus-priv"
  95         append_bool "$cfg" expandhosts "--expand-hosts"
  96         append_bool "$cfg" enable_tftp "--enable-tftp"
  97         append_bool "$cfg" nonwildcard "--bind-interfaces"
  98         append_bool "$cfg" fqdn "--dhcp-fqdn"
  99
 100         append_parm "$cfg" dhcpscript "--dhcp-script"
 101         append_parm "$cfg" cachesize "--cache-size"
 102         append_parm "$cfg" dnsforwardmax "--dns-forward-max"
 103         append_parm "$cfg" port "--port"
 104         append_parm "$cfg" ednspacket_max "--edns-packet-max"
 105         append_parm "$cfg" dhcpleasemax "--dhcp-lease-max"
 106         append_parm "$cfg" "queryport" "--query-port"
 107         append_parm "$cfg" "domain" "--domain"
 108         append_parm "$cfg" "local" "--server"
 109         config_list_foreach "$cfg" "server" append_server
 110         config_list_foreach "$cfg" "address" append_address
 111         config_list_foreach "$cfg" "interface" append_interface
 112         config_list_foreach "$cfg" "notinterface" append_notinterface
 113         config_list_foreach "$cfg" "addnhosts" append_addnhosts
 114         config_list_foreach "$cfg" "bogusnxdomain" append_bogusnxdomain
 115         append_parm "$cfg" "leasefile" "--dhcp-leasefile"
 116         append_parm "$cfg" "resolvfile" "--resolv-file"
 117         append_parm "$cfg" "tftp_root" "--tftp-root"
 118         append_parm "$cfg" "dhcp_boot" "--dhcp-boot"
 119         append_parm "$cfg" "local_ttl" "--local-ttl"
 120
 121         config_get DOMAIN "$cfg" domain
 122
 123         config_get_bool ADD_LOCAL_DOMAIN "$cfg" add_local_domain 1
 124         config_get_bool ADD_LOCAL_HOSTNAME "$cfg" add_local_hostname 1
 125
 126         config_get_bool readethers "$cfg" readethers
 127         [ "$readethers" = "1" -a \! -e "/etc/ethers" ] && touch /etc/ethers
 128
 129         config_get leasefile $cfg leasefile
 130         [ -n "$leasefile" -a \! -e "$leasefile" ] && touch "$leasefile"
 131         config_get_bool cachelocal "$cfg" cachelocal 1
 132
 133         config_get hostsfile "$cfg" dhcphostsfile
 134         [ -e "$hostsfile" ] && xappend "--dhcp-hostsfile=$hostsfile"
 135
 136         local rebind
 137         config_get_bool rebind "$cfg" rebind_protection 1
 138         [ $rebind -gt 0 ] && {
 139                 logger -t dnsmasq \
 140                         "DNS rebinding protection is active," \
 141                         "will discard upstream RFC1918 responses!"
 142                 xappend "--stop-dns-rebind"
 143
 144                 local rebind_localhost
 145                 config_get_bool rebind_localhost "$cfg" rebind_localhost 0
 146                 [ $rebind_localhost -gt 0 ] && {
 147                         logger -t dnsmasq "Allowing 127.0.0.0/8 responses"
 148                         xappend "--rebind-localhost-ok"
 149                 }
 150
 151                 append_rebind_domain() {
 152                         logger -t dnsmasq "Allowing RFC1918 responses for domain $1"
 153                         xappend "--rebind-domain-ok=$1"
 154                 }
 155
 156                 config_list_foreach "$cfg" rebind_domain append_rebind_domain
 157         }
 158
 159         dhcp_option_add "$cfg" "" 0
 160
 161         echo >> $CONFIGFILE
 162 }
 163
 164 dhcp_subscrid_add() {
 165         local cfg="$1"
 166
 167         config_get networkid "$cfg" networkid
 168         [ -n "$networkid" ] || return 0
 169
 170         config_get subscriberid "$cfg" subscriberid
 171         [ -n "$subscriberid" ] || return 0
 172
 173         xappend "--dhcp-subscrid=$networkid,$subscriberid"
 174
 175         config_get_bool force "$cfg" force 0
 176
 177         dhcp_option_add "$cfg" "$networkid" "$force"
 178 }
 179
 180 dhcp_remoteid_add() {
 181         local cfg="$1"
 182
 183         config_get networkid "$cfg" networkid
 184         [ -n "$networkid" ] || return 0
 185
 186         config_get remoteid "$cfg" remoteid
 187         [ -n "$remoteid" ] || return 0
 188
 189         xappend "--dhcp-remoteid=$networkid,$remoteid"
 190
 191         config_get_bool force "$cfg" force 0
 192
 193         dhcp_option_add "$cfg" "$networkid" "$force"
 194 }
 195
 196 dhcp_circuitid_add() {
 197         local cfg="$1"
 198
 199         config_get networkid "$cfg" networkid
 200         [ -n "$networkid" ] || return 0
 201
 202         config_get circuitid "$cfg" circuitid
 203         [ -n "$circuitid" ] || return 0
 204
 205         xappend "--dhcp-circuitid=$networkid,$circuitid"
 206
 207         config_get_bool force "$cfg" force 0
 208
 209         dhcp_option_add "$cfg" "$networkid" "$force"
 210 }
 211
 212 dhcp_userclass_add() {
 213         local cfg="$1"
 214
 215         config_get networkid "$cfg" networkid
 216         [ -n "$networkid" ] || return 0
 217
 218         config_get userclass "$cfg" userclass
 219         [ -n "$userclass" ] || return 0
 220
 221         xappend "--dhcp-userclass=$networkid,$userclass"
 222
 223         config_get_bool force "$cfg" force 0
 224
 225         dhcp_option_add "$cfg" "$networkid" "$force"
 226 }
 227
 228 dhcp_vendorclass_add() {
 229         local cfg="$1"
 230
 231         config_get networkid "$cfg" networkid
 232         [ -n "$networkid" ] || return 0
 233
 234         config_get vendorclass "$cfg" vendorclass
 235         [ -n "$vendorclass" ] || return 0
 236
 237         xappend "--dhcp-vendorclass=$networkid,$vendorclass"
 238
 239         config_get_bool force "$cfg" force 0
 240
 241         dhcp_option_add "$cfg" "$networkid" "$force"
 242 }
 243
 244 dhcp_host_add() {
 245         local cfg="$1"
 246
 247         config_get_bool force "$cfg" force 0
 248
 249         config_get networkid "$cfg" networkid
 250         [ -n "$networkid" ] && dhcp_option_add "$cfg" "$networkid" "$force"
 251
 252         config_get name "$cfg" name
 253         config_get ip "$cfg" ip
 254         [ -n "$ip" -o -n "$name" ] || return 0
 255
 256         config_get mac "$cfg" mac
 257         [ -z "$mac" ] && {
 258                 [ -n "$name" ] || return 0
 259                 mac="$name"
 260                 name=""
 261         }
 262
 263         macs=""
 264         for m in $mac; do append macs "$m" ","; done
 265
 266         config_get tag "$cfg" tag
 267
 268         xappend "--dhcp-host=$macs${networkid:+,net:$networkid}${tag:+,set:$tag}${ip:+,$ip}${name:+,$name}"
 269 }
 270
 271 dhcp_tag_add() {
 272         local cfg="$1"
 273
 274         tag="$cfg"
 275
 276         [ -n "$tag" ] || return 0
 277
 278         config_get_bool force "$cfg" force 0
 279         [ "$force" = "0" ] && force=
 280
 281         config_get option "$cfg" dhcp_option
 282         for o in $option; do
 283                 xappend "--dhcp-option${force:+-force}=tag:$tag,$o"
 284         done
 285 }
 286
 287 dhcp_mac_add() {
 288         local cfg="$1"
 289
 290         config_get networkid "$cfg" networkid
 291         [ -n "$networkid" ] || return 0
 292
 293         config_get mac "$cfg" mac
 294         [ -n "$mac" ] || return 0
 295
 296         xappend "--dhcp-mac=$networkid,$mac"
 297
 298         dhcp_option_add "$cfg" "$networkid"
 299 }
 300
 301 dhcp_boot_add() {
 302         local cfg="$1"
 303
 304         config_get networkid "$cfg" networkid
 305
 306         config_get filename "$cfg" filename
 307         [ -n "$filename" ] || return 0
 308
 309         config_get servername "$cfg" servername
 310         [ -n "$servername" ] || return 0
 311
 312         config_get serveraddress "$cfg" serveraddress
 313         [ -n "$serveraddress" ] || return 0
 314
 315         xappend "--dhcp-boot=${networkid:+net:$networkid,}$filename,$servername,$serveraddress"
 316
 317         config_get_bool force "$cfg" force 0
 318
 319         dhcp_option_add "$cfg" "$networkid" "$force"
 320 }
 321
 322
 323 dhcp_add() {
 324         local cfg="$1"
 325         config_get net "$cfg" interface
 326         [ -n "$net" ] || return 0
 327
 328         config_get networkid "$cfg" networkid
 329         [ -n "$networkid" ] || networkid="$net"
 330
 331         config_get ifname "$net" ifname
 332         [ -n "$ifname" ] || return 0
 333
 334         config_get dnsserver "$net" dns
 335         [ "$cachelocal" = "0" -a -n "$dnsserver" ] && {
 336                 DNS_SERVERS="$DNS_SERVERS $dnsserver"
 337         }
 338
 339         append_bool "$cfg" ignore "--no-dhcp-interface=$ifname" && return 0
 340
 341         config_get proto "$net" proto
 342         [ static = "$proto" ] || return 0
 343
 344         config_get ipaddr "$net" ipaddr
 345         config_get netmask "$cfg" netmask
 346         [ -n "$netmask" ] || config_get netmask "$net" netmask
 347
 348         #check for an already active dhcp server on the interface, unless 'force' is set
 349         config_get_bool force "$cfg" force 0
 350         [ $force -gt 0 ] || {
 351                 udhcpc -n -q -s /bin/true -t 1 -i $ifname >&- && {
 352                         logger -t dnsmasq \
 353                                 "found already running DHCP-server on interface '$ifname'" \
 354                                 "refusing to start, use 'option force 1' to override"
 355                         return 0
 356                 }
 357         }
 358
 359         config_get start "$cfg" start
 360         config_get limit "$cfg" limit
 361         config_get leasetime "$cfg" leasetime
 362         config_get options "$cfg" options
 363         config_get_bool dynamicdhcp "$cfg" dynamicdhcp 1
 364
 365         leasetime="${leasetime:-12h}"
 366         start="$(dhcp_calc "${start:-100}")"
 367         limit="${limit:-150}"
 368         [ "$limit" -gt 0 ] && limit=$((limit-1))
 369         eval "$(ipcalc.sh $ipaddr $netmask $start $limit)"
 370         if [ "$dynamicdhcp" = "0" ]; then END="static"; fi
 371         xappend "--dhcp-range=$networkid,$START,$END,$NETMASK,$leasetime${options:+ $options}"
 372
 373         dhcp_option_add "$cfg" "$networkid"
 374 }
 375
 376 dhcp_option_add() {
 377         local cfg="$1"
 378         local networkid="$2"
 379         local force="$3"
 380
 381         [ "$force" = "0" ] && force=
 382
 383         config_get dhcp_option "$cfg" dhcp_option
 384         for o in $dhcp_option; do
 385                 xappend "--dhcp-option${force:+-force}=${networkid:+$networkid,}$o"
 386         done
 387
 388 }
 389
 390 dhcp_domain_add() {
 391         local cfg="$1"
 392         local ip name names
 393
 394         config_get names "$cfg" name "$2"
 395         [ -n "$names" ] || return 0
 396
 397         config_get ip "$cfg" ip "$3"
 398         [ -n "$ip" ] || return 0
 399
 400         local oIFS="$IFS"; IFS="."; set -- $ip; IFS="$oIFS"
 401         local raddr="${4:+$4.$3.$2.$1.in-addr.arpa}"
 402
 403         for name in $names; do
 404                 local fqdn="$name"
 405
 406                 [ "${fqdn%.*}" == "$fqdn" ] && \
 407                         fqdn="$fqdn${DOMAIN:+.$DOMAIN}"
 408
 409                 xappend "--address=/$fqdn/$ip"
 410
 411                 [ -n "$raddr" ] && {
 412                         xappend "--ptr-record=$raddr,$fqdn"
 413                         raddr=""
 414                 }
 415         done
 416 }
 417
 418 dhcp_srv_add() {
 419         local cfg="$1"
 420
 421         config_get srv "$cfg" srv
 422         [ -n "$srv" ] || return 0
 423
 424         config_get target "$cfg" target
 425         [ -n "$target" ] || return 0
 426
 427         config_get port "$cfg" port
 428         [ -n "$port" ] || return 0
 429
 430         config_get class "$cfg" class
 431         config_get weight "$cfg" weight
 432
 433         local service="$srv,$target,$port${class:+,$class${weight:+,$weight}}"
 434
 435         xappend "--srv-host=$service"
 436 }
 437
 438 dhcp_mx_add() {
 439         local cfg="$1"
 440         local domain relay pref
 441
 442         config_get domain "$cfg" domain
 443         [ -n "$domain" ] || return 0
 444
 445         config_get relay "$cfg" relay
 446         [ -n "$relay" ] || return 0
 447
 448         config_get pref "$cfg" pref 0
 449
 450         local service="$domain,$relay,$pref"
 451
 452         xappend "--mx-host=$service"
 453 }
 454
 455 dhcp_cname_add() {
 456         local cfg="$1"
 457         local cname target
 458
 459         config_get cname "$cfg" cname
 460         [ -n "$cname" ] || return 0
 461
 462         config_get target "$cfg" target
 463         [ -n "$target" ] || return 0
 464
 465         xappend "--cname=${cname},${target}"
 466 }
 467
 468 start() {
 469         include /lib/network
 470         scan_interfaces
 471
 472         local lanaddr
 473         config_get lanaddr "lan" ipaddr
 474
 475         config_load dhcp
 476
 477         # before we can call xappend
 478         mkdir -p $(dirname $CONFIGFILE)
 479
 480         echo "# auto-generated config file from /etc/config/dhcp" > $CONFIGFILE
 481
 482         # if we did this last, we could override auto-generated config
 483         [ -f /etc/dnsmasq.conf ] && {
 484                 xappend "--conf-file=/etc/dnsmasq.conf"
 485         }
 486
 487         args=""
 488         config_foreach dnsmasq dnsmasq
 489         config_foreach dhcp_host_add host
 490         echo >> $CONFIGFILE
 491         config_foreach dhcp_boot_add boot
 492         config_foreach dhcp_mac_add mac
 493         config_foreach dhcp_tag_add tag
 494         config_foreach dhcp_vendorclass_add vendorclass
 495         config_foreach dhcp_userclass_add userclass
 496         config_foreach dhcp_circuitid_add circuitid
 497         config_foreach dhcp_remoteid_add remoteid
 498         config_foreach dhcp_subscrid_add subscrid
 499         config_foreach dhcp_domain_add domain
 500         echo >> $CONFIGFILE
 501         config_foreach dhcp_srv_add srvhost
 502         config_foreach dhcp_mx_add mxhost
 503         echo >> $CONFIGFILE
 504         config_foreach dhcp_add dhcp
 505         echo >> $CONFIGFILE
 506         config_foreach dhcp_cname_add cname
 507         echo >> $CONFIGFILE
 508
 509         # add own hostname
 510         [ $ADD_LOCAL_HOSTNAME -eq 1 ] && [ -n "$lanaddr" ] && {
 511                 local hostname="$(uci_get system.@system[0].hostname)"
 512                 dhcp_domain_add "" "${hostname:-OpenWrt}" "$lanaddr"
 513         }
 514
 515         service_start /usr/sbin/dnsmasq -C $CONFIGFILE && {
 516                 rm -f /tmp/resolv.conf
 517                 [ $ADD_LOCAL_DOMAIN -eq 1 ] && [ -n "$DOMAIN" ] && {
 518                         echo "search $DOMAIN" >> /tmp/resolv.conf
 519                 }
 520                 DNS_SERVERS="$DNS_SERVERS 127.0.0.1"
 521                 for DNS_SERVER in $DNS_SERVERS ; do
 522                         echo "nameserver $DNS_SERVER" >> /tmp/resolv.conf
 523                 done
 524         }
 525 }
 526
 527 stop() {
 528         service_stop /usr/sbin/dnsmasq && {
 529                 [ -f /tmp/resolv.conf ] && {
 530                         rm -f /tmp/resolv.conf
 531                         ln -s /tmp/resolv.conf.auto /tmp/resolv.conf
 532                 }
 533         }
 534 }