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