package/dnsmasq/files/dnsmasq.init

   1 #!/bin/sh /etc/rc.common
   2 # Copyright (C) 2007 OpenWrt.org
   3
   4 START=60
   5
   6 SERVICE_USE_PID=1
   7
   8 DNS_SERVERS=""
   9 DOMAIN=""
  10
  11 CONFIGFILE="/var/etc/dnsmasq.conf"
  12
  13 xappend() {
  14         local value="$1"
  15
  16         echo "${value#--}" >> $CONFIGFILE
  17 }
  18
  19 dhcp_calc() {
  20         local ip="$1"
  21         local res=0
  22
  23         while [ -n "$ip" ]; do
  24                 part="${ip%%.*}"
  25                 res="$(($res * 256))"
  26                 res="$(($res + $part))"
  27                 [ "${ip%.*}" != "$ip" ] && ip="${ip#*.}" || ip=
  28         done
  29         echo "$res"
  30 }
  31
  32 append_bool() {
  33         local section="$1"
  34         local option="$2"
  35         local value="$3"
  36         local _loctmp
  37         config_get_bool _loctmp "$section" "$option" 0
  38         [ $_loctmp -gt 0 ] && xappend "$value"
  39 }
  40
  41 append_parm() {
  42         local section="$1"
  43         local option="$2"
  44         local switch="$3"
  45         local _loctmp
  46         config_get _loctmp "$section" "$option"
  47         [ -z "$_loctmp" ] && return 0
  48         xappend "$switch=$_loctmp"
  49 }
  50
  51 append_server() {
  52         xappend "--server=$1"
  53 }
  54
  55 append_interface() {
  56         local ifname=$(uci_get_state network "$1" ifname "$1")
  57         xappend "--interface=$ifname"
  58 }
  59
  60 append_notinterface() {
  61         local ifname=$(uci_get_state network "$1" ifname "$1")
  62         xappend "--except-interface=$ifname"
  63 }
  64
  65 append_addnhosts() {
  66         xappend "--addn-hosts=$1"
  67 }
  68
  69 append_bogusnxdomain() {
  70        xappend "--bogus-nxdomain=$1"
  71 }
  72
  73 dnsmasq() {
  74         local cfg="$1"
  75         append_bool "$cfg" authoritative "--dhcp-authoritative"
  76         append_bool "$cfg" nodaemon "--no-daemon"
  77         append_bool "$cfg" domainneeded "--domain-needed"
  78         append_bool "$cfg" filterwin2k "--filterwin2k"
  79         append_bool "$cfg" nohosts "--no-hosts"
  80         append_bool "$cfg" nonegcache "--no-negcache"
  81         append_bool "$cfg" strictorder "--strict-order"
  82         append_bool "$cfg" logqueries "--log-queries"
  83         append_bool "$cfg" noresolv "--no-resolv"
  84         append_bool "$cfg" localise_queries "--localise-queries"
  85         append_bool "$cfg" readethers "--read-ethers"
  86         append_bool "$cfg" dbus "--enable-dbus"
  87         append_bool "$cfg" boguspriv "--bogus-priv"
  88         append_bool "$cfg" expandhosts "--expand-hosts"
  89         append_bool "$cfg" enable_tftp "--enable-tftp"
  90         append_bool "$cfg" nonwildcard "--bind-interfaces"
  91         append_bool "$cfg" fqdn "--dhcp-fqdn"
  92
  93         append_parm "$cfg" dhcpscript "--dhcp-script"
  94         append_parm "$cfg" cachesize "--cache-size"
  95         append_parm "$cfg" dnsforwardmax "--dns-forward-max"
  96         append_parm "$cfg" port "--port"
  97         append_parm "$cfg" ednspacket_max "--edns-packet-max"
  98         append_parm "$cfg" dhcpleasemax "--dhcp-lease-max"
  99         append_parm "$cfg" "queryport" "--query-port"
 100         append_parm "$cfg" "domain" "--domain"
 101         append_parm "$cfg" "local" "--server"
 102         config_list_foreach "$cfg" "server" append_server
 103         config_list_foreach "$cfg" "interface" append_interface
 104         config_list_foreach "$cfg" "notinterface" append_notinterface
 105         config_list_foreach "$cfg" "addnhosts" append_addnhosts
 106         config_list_foreach "$cfg" "bogusnxdomain" append_bogusnxdomain
 107         append_parm "$cfg" "leasefile" "--dhcp-leasefile"
 108         append_parm "$cfg" "resolvfile" "--resolv-file"
 109         append_parm "$cfg" "tftp_root" "--tftp-root"
 110         append_parm "$cfg" "dhcp_boot" "--dhcp-boot"
 111
 112         config_get DOMAIN "$cfg" domain
 113
 114         config_get_bool readethers "$cfg" readethers
 115         [ "$readethers" = "1" -a \! -e "/etc/ethers" ] && touch /etc/ethers
 116
 117         config_get leasefile $cfg leasefile
 118         [ -n "$leasefile" -a \! -e "$leasefile" ] && touch "$leasefile"
 119         config_get_bool cachelocal "$cfg" cachelocal 1
 120
 121         config_get hostsfile "$cfg" dhcphostsfile
 122         [ -e "$hostsfile" ] && xappend "--dhcp-hostsfile=$hostsfile"
 123
 124         local rebind
 125         config_get_bool rebind "$cfg" rebind_protection 1
 126         [ $rebind -gt 0 ] && {
 127                 logger -t dnsmasq \
 128                         "DNS rebinding protection is active," \
 129                         "will discard upstream RFC1918 responses!"
 130                 xappend "--stop-dns-rebind"
 131
 132                 local rebind_localhost
 133                 config_get_bool rebind_localhost "$cfg" rebind_localhost 0
 134                 [ $rebind_localhost -gt 0 ] && {
 135                         logger -t dnsmasq "Allowing 127.0.0.0/8 responses"
 136                         xappend "--rebind-localhost-ok"
 137                 }
 138
 139                 append_rebind_domain() {
 140                         logger -t dnsmasq "Allowing RFC1918 responses for domain $1"
 141                         xappend "--rebind-domain-ok=$1"
 142                 }
 143
 144                 config_list_foreach "$cfg" rebind_domain append_rebind_domain
 145         }
 146
 147         dhcp_option_add "$cfg" "" 0
 148
 149         echo >> $CONFIGFILE
 150 }
 151
 152 dhcp_subscrid_add() {
 153         local cfg="$1"
 154
 155         config_get networkid "$cfg" networkid
 156         [ -n "$networkid" ] || return 0
 157
 158         config_get subscriberid "$cfg" subscriberid
 159         [ -n "$subscriberid" ] || return 0
 160
 161         xappend "--dhcp-subscrid=$networkid,$subscriberid"
 162
 163         config_get_bool force "$cfg" force 0
 164
 165         dhcp_option_add "$cfg" "$networkid" "$force"
 166 }
 167
 168 dhcp_remoteid_add() {
 169         local cfg="$1"
 170
 171         config_get networkid "$cfg" networkid
 172         [ -n "$networkid" ] || return 0
 173
 174         config_get remoteid "$cfg" remoteid
 175         [ -n "$remoteid" ] || return 0
 176
 177         xappend "--dhcp-remoteid=$networkid,$remoteid"
 178
 179         config_get_bool force "$cfg" force 0
 180
 181         dhcp_option_add "$cfg" "$networkid" "$force"
 182 }
 183
 184 dhcp_circuitid_add() {
 185         local cfg="$1"
 186
 187         config_get networkid "$cfg" networkid
 188         [ -n "$networkid" ] || return 0
 189
 190         config_get circuitid "$cfg" circuitid
 191         [ -n "$circuitid" ] || return 0
 192
 193         xappend "--dhcp-circuitid=$networkid,$circuitid"
 194
 195         config_get_bool force "$cfg" force 0
 196
 197         dhcp_option_add "$cfg" "$networkid" "$force"
 198 }
 199
 200 dhcp_userclass_add() {
 201         local cfg="$1"
 202
 203         config_get networkid "$cfg" networkid
 204         [ -n "$networkid" ] || return 0
 205
 206         config_get userclass "$cfg" userclass
 207         [ -n "$userclass" ] || return 0
 208
 209         xappend "--dhcp-userclass=$networkid,$userclass"
 210
 211         config_get_bool force "$cfg" force 0
 212
 213         dhcp_option_add "$cfg" "$networkid" "$force"
 214 }
 215
 216 dhcp_vendorclass_add() {
 217         local cfg="$1"
 218
 219         config_get networkid "$cfg" networkid
 220         [ -n "$networkid" ] || return 0
 221
 222         config_get vendorclass "$cfg" vendorclass
 223         [ -n "$vendorclass" ] || return 0
 224
 225         xappend "--dhcp-vendorclass=$networkid,$vendorclass"
 226
 227         config_get_bool force "$cfg" force 0
 228
 229         dhcp_option_add "$cfg" "$networkid" "$force"
 230 }
 231
 232 dhcp_host_add() {
 233         local cfg="$1"
 234
 235         config_get_bool force "$cfg" force 0
 236
 237         config_get networkid "$cfg" networkid
 238         [ -n "$networkid" ] && dhcp_option_add "$cfg" "$networkid" "$force"
 239
 240         config_get name "$cfg" name
 241         config_get ip "$cfg" ip
 242         [ -n "$ip" -o -n "$name" ] || return 0
 243
 244         macs=""
 245         config_get mac "$cfg" mac
 246         for m in $mac; do append macs "$m" ","; done
 247         [ -n "$macs" ] || return 0
 248
 249         config_get tag "$cfg" tag
 250
 251         xappend "--dhcp-host=$macs${networkid:+,net:$networkid}${tag:+,set:$tag}${ip:+,$ip}${name:+,$name}"
 252 }
 253
 254 dhcp_tag_add() {
 255         local cfg="$1"
 256
 257         tag="$cfg"
 258
 259         [ -n "$tag" ] || return 0
 260
 261         config_get_bool force "$cfg" force 0
 262         [ "$force" = "0" ] && force=
 263
 264         config_get option "$cfg" dhcp_option
 265         for o in $option; do
 266                 xappend "--dhcp-option${force:+-force}=tag:$tag,$o"
 267         done
 268 }
 269
 270 dhcp_mac_add() {
 271         local cfg="$1"
 272
 273         config_get networkid "$cfg" networkid
 274         [ -n "$networkid" ] || return 0
 275
 276         config_get mac "$cfg" mac
 277         [ -n "$mac" ] || return 0
 278
 279         xappend "--dhcp-mac=$networkid,$mac"
 280
 281         dhcp_option_add "$cfg" "$networkid"
 282 }
 283
 284 dhcp_boot_add() {
 285         local cfg="$1"
 286
 287         config_get networkid "$cfg" networkid
 288
 289         config_get filename "$cfg" filename
 290         [ -n "$filename" ] || return 0
 291
 292         config_get servername "$cfg" servername
 293         [ -n "$servername" ] || return 0
 294
 295         config_get serveraddress "$cfg" serveraddress
 296         [ -n "$serveraddress" ] || return 0
 297
 298         xappend "--dhcp-boot=${networkid:+net:$networkid,}$filename,$servername,$serveraddress"
 299
 300         config_get_bool force "$cfg" force 0
 301
 302         dhcp_option_add "$cfg" "$networkid" "$force"
 303 }
 304
 305
 306 dhcp_add() {
 307         local cfg="$1"
 308         config_get net "$cfg" interface
 309         [ -n "$net" ] || return 0
 310
 311         config_get networkid "$cfg" networkid
 312         [ -n "$networkid" ] || networkid="$net"
 313
 314         config_get ifname "$net" ifname
 315         [ -n "$ifname" ] || return 0
 316
 317         config_get dnsserver "$net" dns
 318         [ "$cachelocal" = "0" -a -n "$dnsserver" ] && {
 319                 DNS_SERVERS="$DNS_SERVERS $dnsserver"
 320         }
 321
 322         append_bool "$cfg" ignore "--no-dhcp-interface=$ifname" && return 0
 323
 324         config_get proto "$net" proto
 325         [ static = "$proto" ] || return 0
 326
 327         config_get ipaddr "$net" ipaddr
 328         config_get netmask "$cfg" netmask
 329         [ -n "$netmask" ] || config_get netmask "$net" netmask
 330
 331         #check for an already active dhcp server on the interface, unless 'force' is set
 332         config_get_bool force "$cfg" force 0
 333         [ $force -gt 0 ] || {
 334                 udhcpc -n -q -s /bin/true -t 1 -i $ifname >&- && {
 335                         logger -t dnsmasq \
 336                                 "found already running DHCP-server on interface '$ifname'" \
 337                                 "refusing to start, use 'option force 1' to override"
 338                         return 0
 339                 }
 340         }
 341
 342         config_get start "$cfg" start
 343         config_get limit "$cfg" limit
 344         config_get leasetime "$cfg" leasetime
 345         config_get options "$cfg" options
 346         config_get_bool dynamicdhcp "$cfg" dynamicdhcp 1
 347
 348         leasetime="${leasetime:-12h}"
 349         start="$(dhcp_calc "${start:-100}")"
 350         limit="${limit:-150}"
 351         [ "$limit" -gt 0 ] && limit=$((limit-1))
 352         eval "$(ipcalc.sh $ipaddr $netmask $start $limit)"
 353         if [ "$dynamicdhcp" = "0" ]; then END="static"; fi
 354         xappend "--dhcp-range=$networkid,$START,$END,$NETMASK,$leasetime${options:+ $options}"
 355
 356         dhcp_option_add "$cfg" "$networkid"
 357 }
 358
 359 dhcp_option_add() {
 360         local cfg="$1"
 361         local networkid="$2"
 362         local force="$3"
 363
 364         [ "$force" = "0" ] && force=
 365
 366         config_get dhcp_option "$cfg" dhcp_option
 367         for o in $dhcp_option; do
 368                 xappend "--dhcp-option${force:+-force}=${networkid:+$networkid,}$o"
 369         done
 370
 371 }
 372
 373 dhcp_domain_add() {
 374         local cfg="$1"
 375         local ip name names
 376
 377         config_get names "$cfg" name "$2"
 378         [ -n "$names" ] || return 0
 379
 380         config_get ip "$cfg" ip "$3"
 381         [ -n "$ip" ] || return 0
 382
 383         local oIFS="$IFS"; IFS="."; set -- $ip; IFS="$oIFS"
 384         local raddr="${4:+$4.$3.$2.$1.in-addr.arpa}"
 385
 386         for name in $names; do
 387                 local fqdn="$name"
 388
 389                 [ "${fqdn%.*}" == "$fqdn" ] && \
 390                         fqdn="$fqdn${DOMAIN:+.$DOMAIN}"
 391
 392                 xappend "--address=/$fqdn/$ip"
 393
 394                 [ -n "$raddr" ] && {
 395                         xappend "--ptr-record=$raddr,$fqdn"
 396                         raddr=""
 397                 }
 398         done
 399 }
 400
 401 dhcp_srv_add() {
 402         local cfg="$1"
 403
 404         config_get srv "$cfg" srv
 405         [ -n "$srv" ] || return 0
 406
 407         config_get target "$cfg" target
 408         [ -n "$target" ] || return 0
 409
 410         config_get port "$cfg" port
 411         [ -n "$port" ] || return 0
 412
 413         config_get class "$cfg" class
 414         config_get weight "$cfg" weight
 415
 416         local service="$srv,$target,$port${class:+,$class${weight:+,$weight}}"
 417
 418         xappend "--srv-host=$service"
 419 }
 420
 421 dhcp_mx_add() {
 422         local cfg="$1"
 423         local domain relay pref
 424
 425         config_get domain "$cfg" domain
 426         [ -n "$domain" ] || return 0
 427
 428         config_get relay "$cfg" relay
 429         [ -n "$relay" ] || return 0
 430
 431         config_get pref "$cfg" pref 0
 432
 433         local service="$domain,$relay,$pref"
 434
 435         xappend "--mx-host=$service"
 436 }
 437
 438 dhcp_cname_add() {
 439         local cfg="$1"
 440         local cname target
 441
 442         config_get cname "$cfg" cname
 443         [ -n "$cname" ] || return 0
 444
 445         config_get target "$cfg" target
 446         [ -n "$target" ] || return 0
 447
 448         xappend "--cname=${cname},${target}"
 449 }
 450
 451 start() {
 452         include /lib/network
 453         scan_interfaces
 454
 455         local lanaddr
 456         config_get lanaddr "lan" ipaddr
 457
 458         config_load dhcp
 459
 460         # before we can call xappend
 461         mkdir -p $(dirname $CONFIGFILE)
 462
 463         echo "# auto-generated config file from /etc/config/dhcp" > $CONFIGFILE
 464
 465         # if we did this last, we could override auto-generated config
 466         [ -f /etc/dnsmasq.conf ] && {
 467                 xappend "--conf-file=/etc/dnsmasq.conf"
 468         }
 469
 470         args=""
 471         config_foreach dnsmasq dnsmasq
 472         config_foreach dhcp_host_add host
 473         echo >> $CONFIGFILE
 474         config_foreach dhcp_boot_add boot
 475         config_foreach dhcp_mac_add mac
 476         config_foreach dhcp_tag_add tag
 477         config_foreach dhcp_vendorclass_add vendorclass
 478         config_foreach dhcp_userclass_add userclass
 479         config_foreach dhcp_circuitid_add circuitid
 480         config_foreach dhcp_remoteid_add remoteid
 481         config_foreach dhcp_subscrid_add subscrid
 482         config_foreach dhcp_domain_add domain
 483         echo >> $CONFIGFILE
 484         config_foreach dhcp_srv_add srvhost
 485         config_foreach dhcp_mx_add mxhost
 486         echo >> $CONFIGFILE
 487         config_foreach dhcp_add dhcp
 488         echo >> $CONFIGFILE
 489         config_foreach dhcp_cname_add cname
 490         echo >> $CONFIGFILE
 491
 492         # add own hostname
 493         [ -z "$lanaddr" ] || {
 494                 local hostname="$(uci_get system.@system[0].hostname)"
 495                 dhcp_domain_add "" "${hostname:-OpenWrt}" "$lanaddr"
 496         }
 497
 498         service_start /usr/sbin/dnsmasq -C $CONFIGFILE && {
 499                 rm -f /tmp/resolv.conf
 500                 [ -n "$DOMAIN" ] && echo "search $DOMAIN" >> /tmp/resolv.conf
 501                 DNS_SERVERS="$DNS_SERVERS 127.0.0.1"
 502                 for DNS_SERVER in $DNS_SERVERS ; do
 503                         echo "nameserver $DNS_SERVER" >> /tmp/resolv.conf
 504                 done
 505         }
 506 }
 507
 508 stop() {
 509         service_stop /usr/sbin/dnsmasq && {
 510                 [ -f /tmp/resolv.conf ] && {
 511                         rm -f /tmp/resolv.conf
 512                         ln -s /tmp/resolv.conf.auto /tmp/resolv.conf
 513                 }
 514         }
 515 }