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         append_bool "$cfg" proxydnssec "--proxy-dnssec"
 100
 101         append_parm "$cfg" dhcpscript "--dhcp-script"
 102         append_parm "$cfg" cachesize "--cache-size"
 103         append_parm "$cfg" dnsforwardmax "--dns-forward-max"
 104         append_parm "$cfg" port "--port"
 105         append_parm "$cfg" ednspacket_max "--edns-packet-max"
 106         append_parm "$cfg" dhcpleasemax "--dhcp-lease-max"
 107         append_parm "$cfg" "queryport" "--query-port"
 108         append_parm "$cfg" "domain" "--domain"
 109         append_parm "$cfg" "local" "--server"
 110         config_list_foreach "$cfg" "server" append_server
 111         config_list_foreach "$cfg" "address" append_address
 112         config_list_foreach "$cfg" "interface" append_interface
 113         config_list_foreach "$cfg" "notinterface" append_notinterface
 114         config_list_foreach "$cfg" "addnhosts" append_addnhosts
 115         config_list_foreach "$cfg" "bogusnxdomain" append_bogusnxdomain
 116         append_parm "$cfg" "leasefile" "--dhcp-leasefile"
 117         append_parm "$cfg" "resolvfile" "--resolv-file"
 118         append_parm "$cfg" "tftp_root" "--tftp-root"
 119         append_parm "$cfg" "dhcp_boot" "--dhcp-boot"
 120         append_parm "$cfg" "local_ttl" "--local-ttl"
 121
 122         config_get DOMAIN "$cfg" domain
 123
 124         config_get_bool ADD_LOCAL_DOMAIN "$cfg" add_local_domain 1
 125         config_get_bool ADD_LOCAL_HOSTNAME "$cfg" add_local_hostname 1
 126
 127         config_get_bool readethers "$cfg" readethers
 128         [ "$readethers" = "1" -a \! -e "/etc/ethers" ] && touch /etc/ethers
 129
 130         config_get leasefile $cfg leasefile
 131         [ -n "$leasefile" -a \! -e "$leasefile" ] && touch "$leasefile"
 132         config_get_bool cachelocal "$cfg" cachelocal 1
 133
 134         config_get hostsfile "$cfg" dhcphostsfile
 135         [ -e "$hostsfile" ] && xappend "--dhcp-hostsfile=$hostsfile"
 136
 137         local rebind
 138         config_get_bool rebind "$cfg" rebind_protection 1
 139         [ $rebind -gt 0 ] && {
 140                 logger -t dnsmasq \
 141                         "DNS rebinding protection is active," \
 142                         "will discard upstream RFC1918 responses!"
 143                 xappend "--stop-dns-rebind"
 144
 145                 local rebind_localhost
 146                 config_get_bool rebind_localhost "$cfg" rebind_localhost 0
 147                 [ $rebind_localhost -gt 0 ] && {
 148                         logger -t dnsmasq "Allowing 127.0.0.0/8 responses"
 149                         xappend "--rebind-localhost-ok"
 150                 }
 151
 152                 append_rebind_domain() {
 153                         logger -t dnsmasq "Allowing RFC1918 responses for domain $1"
 154                         xappend "--rebind-domain-ok=$1"
 155                 }
 156
 157                 config_list_foreach "$cfg" rebind_domain append_rebind_domain
 158         }
 159
 160         dhcp_option_add "$cfg" "" 0
 161
 162         echo >> $CONFIGFILE
 163 }
 164
 165 dhcp_subscrid_add() {
 166         local cfg="$1"
 167
 168         config_get networkid "$cfg" networkid
 169         [ -n "$networkid" ] || return 0
 170
 171         config_get subscriberid "$cfg" subscriberid
 172         [ -n "$subscriberid" ] || return 0
 173
 174         xappend "--dhcp-subscrid=$networkid,$subscriberid"
 175
 176         config_get_bool force "$cfg" force 0
 177
 178         dhcp_option_add "$cfg" "$networkid" "$force"
 179 }
 180
 181 dhcp_remoteid_add() {
 182         local cfg="$1"
 183
 184         config_get networkid "$cfg" networkid
 185         [ -n "$networkid" ] || return 0
 186
 187         config_get remoteid "$cfg" remoteid
 188         [ -n "$remoteid" ] || return 0
 189
 190         xappend "--dhcp-remoteid=$networkid,$remoteid"
 191
 192         config_get_bool force "$cfg" force 0
 193
 194         dhcp_option_add "$cfg" "$networkid" "$force"
 195 }
 196
 197 dhcp_circuitid_add() {
 198         local cfg="$1"
 199
 200         config_get networkid "$cfg" networkid
 201         [ -n "$networkid" ] || return 0
 202
 203         config_get circuitid "$cfg" circuitid
 204         [ -n "$circuitid" ] || return 0
 205
 206         xappend "--dhcp-circuitid=$networkid,$circuitid"
 207
 208         config_get_bool force "$cfg" force 0
 209
 210         dhcp_option_add "$cfg" "$networkid" "$force"
 211 }
 212
 213 dhcp_userclass_add() {
 214         local cfg="$1"
 215
 216         config_get networkid "$cfg" networkid
 217         [ -n "$networkid" ] || return 0
 218
 219         config_get userclass "$cfg" userclass
 220         [ -n "$userclass" ] || return 0
 221
 222         xappend "--dhcp-userclass=$networkid,$userclass"
 223
 224         config_get_bool force "$cfg" force 0
 225
 226         dhcp_option_add "$cfg" "$networkid" "$force"
 227 }
 228
 229 dhcp_vendorclass_add() {
 230         local cfg="$1"
 231
 232         config_get networkid "$cfg" networkid
 233         [ -n "$networkid" ] || return 0
 234
 235         config_get vendorclass "$cfg" vendorclass
 236         [ -n "$vendorclass" ] || return 0
 237
 238         xappend "--dhcp-vendorclass=$networkid,$vendorclass"
 239
 240         config_get_bool force "$cfg" force 0
 241
 242         dhcp_option_add "$cfg" "$networkid" "$force"
 243 }
 244
 245 dhcp_host_add() {
 246         local cfg="$1"
 247
 248         config_get_bool force "$cfg" force 0
 249
 250         config_get networkid "$cfg" networkid
 251         [ -n "$networkid" ] && dhcp_option_add "$cfg" "$networkid" "$force"
 252
 253         config_get name "$cfg" name
 254         config_get ip "$cfg" ip
 255         [ -n "$ip" -o -n "$name" ] || return 0
 256
 257         config_get mac "$cfg" mac
 258         [ -z "$mac" ] && {
 259                 [ -n "$name" ] || return 0
 260                 mac="$name"
 261                 name=""
 262         }
 263
 264         macs=""
 265         for m in $mac; do append macs "$m" ","; done
 266
 267         config_get tag "$cfg" tag
 268
 269         xappend "--dhcp-host=$macs${networkid:+,net:$networkid}${tag:+,set:$tag}${ip:+,$ip}${name:+,$name}"
 270 }
 271
 272 dhcp_tag_add() {
 273         local cfg="$1"
 274
 275         tag="$cfg"
 276
 277         [ -n "$tag" ] || return 0
 278
 279         config_get_bool force "$cfg" force 0
 280         [ "$force" = "0" ] && force=
 281
 282         config_get option "$cfg" dhcp_option
 283         for o in $option; do
 284                 xappend "--dhcp-option${force:+-force}=tag:$tag,$o"
 285         done
 286 }
 287
 288 dhcp_mac_add() {
 289         local cfg="$1"
 290
 291         config_get networkid "$cfg" networkid
 292         [ -n "$networkid" ] || return 0
 293
 294         config_get mac "$cfg" mac
 295         [ -n "$mac" ] || return 0
 296
 297         xappend "--dhcp-mac=$networkid,$mac"
 298
 299         dhcp_option_add "$cfg" "$networkid"
 300 }
 301
 302 dhcp_boot_add() {
 303         local cfg="$1"
 304
 305         config_get networkid "$cfg" networkid
 306
 307         config_get filename "$cfg" filename
 308         [ -n "$filename" ] || return 0
 309
 310         config_get servername "$cfg" servername
 311         [ -n "$servername" ] || return 0
 312
 313         config_get serveraddress "$cfg" serveraddress
 314         [ -n "$serveraddress" ] || return 0
 315
 316         xappend "--dhcp-boot=${networkid:+net:$networkid,}$filename,$servername,$serveraddress"
 317
 318         config_get_bool force "$cfg" force 0
 319
 320         dhcp_option_add "$cfg" "$networkid" "$force"
 321 }
 322
 323
 324 dhcp_add() {
 325         local cfg="$1"
 326         config_get net "$cfg" interface
 327         [ -n "$net" ] || return 0
 328
 329         config_get networkid "$cfg" networkid
 330         [ -n "$networkid" ] || networkid="$net"
 331
 332         config_get ifname "$net" ifname
 333         [ -n "$ifname" ] || return 0
 334
 335         config_get dnsserver "$net" dns
 336         [ "$cachelocal" = "0" -a -n "$dnsserver" ] && {
 337                 DNS_SERVERS="$DNS_SERVERS $dnsserver"
 338         }
 339
 340         append_bool "$cfg" ignore "--no-dhcp-interface=$ifname" && return 0
 341
 342         config_get proto "$net" proto
 343         [ static = "$proto" ] || return 0
 344
 345         config_get ipaddr "$net" ipaddr
 346         config_get netmask "$cfg" netmask
 347         [ -n "$netmask" ] || config_get netmask "$net" netmask
 348
 349         #check for an already active dhcp server on the interface, unless 'force' is set
 350         config_get_bool force "$cfg" force 0
 351         [ $force -gt 0 ] || {
 352                 udhcpc -n -q -s /bin/true -t 1 -i $ifname >&- && {
 353                         logger -t dnsmasq \
 354                                 "found already running DHCP-server on interface '$ifname'" \
 355                                 "refusing to start, use 'option force 1' to override"
 356                         return 0
 357                 }
 358         }
 359
 360         config_get start "$cfg" start
 361         config_get limit "$cfg" limit
 362         config_get leasetime "$cfg" leasetime
 363         config_get options "$cfg" options
 364         config_get_bool dynamicdhcp "$cfg" dynamicdhcp 1
 365
 366         leasetime="${leasetime:-12h}"
 367         start="$(dhcp_calc "${start:-100}")"
 368         limit="${limit:-150}"
 369         [ "$limit" -gt 0 ] && limit=$((limit-1))
 370         eval "$(ipcalc.sh $ipaddr $netmask $start $limit)"
 371         if [ "$dynamicdhcp" = "0" ]; then END="static"; fi
 372         xappend "--dhcp-range=$networkid,$START,$END,$NETMASK,$leasetime${options:+ $options}"
 373
 374         dhcp_option_add "$cfg" "$networkid"
 375 }
 376
 377 dhcp_option_add() {
 378         local cfg="$1"
 379         local networkid="$2"
 380         local force="$3"
 381
 382         [ "$force" = "0" ] && force=
 383
 384         config_get dhcp_option "$cfg" dhcp_option
 385         for o in $dhcp_option; do
 386                 xappend "--dhcp-option${force:+-force}=${networkid:+$networkid,}$o"
 387         done
 388
 389 }
 390
 391 dhcp_domain_add() {
 392         local cfg="$1"
 393         local ip name names
 394
 395         config_get names "$cfg" name "$2"
 396         [ -n "$names" ] || return 0
 397
 398         config_get ip "$cfg" ip "$3"
 399         [ -n "$ip" ] || return 0
 400
 401         local oIFS="$IFS"; IFS="."; set -- $ip; IFS="$oIFS"
 402         local raddr="${4:+$4.$3.$2.$1.in-addr.arpa}"
 403
 404         for name in $names; do
 405                 local fqdn="$name"
 406
 407                 [ "${fqdn%.*}" == "$fqdn" ] && \
 408                         fqdn="$fqdn${DOMAIN:+.$DOMAIN}"
 409
 410                 xappend "--address=/$fqdn/$ip"
 411
 412                 [ -n "$raddr" ] && {
 413                         xappend "--ptr-record=$raddr,$fqdn"
 414                         raddr=""
 415                 }
 416         done
 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 start() {
 470         include /lib/network
 471         scan_interfaces
 472
 473         local lanaddr
 474         config_get lanaddr "lan" ipaddr
 475
 476         config_load dhcp
 477
 478         # before we can call xappend
 479         mkdir -p $(dirname $CONFIGFILE)
 480
 481         echo "# auto-generated config file from /etc/config/dhcp" > $CONFIGFILE
 482
 483         # if we did this last, we could override auto-generated config
 484         [ -f /etc/dnsmasq.conf ] && {
 485                 xappend "--conf-file=/etc/dnsmasq.conf"
 486         }
 487
 488         args=""
 489         config_foreach dnsmasq dnsmasq
 490         config_foreach dhcp_host_add host
 491         echo >> $CONFIGFILE
 492         config_foreach dhcp_boot_add boot
 493         config_foreach dhcp_mac_add mac
 494         config_foreach dhcp_tag_add tag
 495         config_foreach dhcp_vendorclass_add vendorclass
 496         config_foreach dhcp_userclass_add userclass
 497         config_foreach dhcp_circuitid_add circuitid
 498         config_foreach dhcp_remoteid_add remoteid
 499         config_foreach dhcp_subscrid_add subscrid
 500         config_foreach dhcp_domain_add domain
 501         echo >> $CONFIGFILE
 502         config_foreach dhcp_srv_add srvhost
 503         config_foreach dhcp_mx_add mxhost
 504         echo >> $CONFIGFILE
 505         config_foreach dhcp_add dhcp
 506         echo >> $CONFIGFILE
 507         config_foreach dhcp_cname_add cname
 508         echo >> $CONFIGFILE
 509
 510         # add own hostname
 511         [ $ADD_LOCAL_HOSTNAME -eq 1 ] && [ -n "$lanaddr" ] && {
 512                 local hostname="$(uci_get system.@system[0].hostname)"
 513                 dhcp_domain_add "" "${hostname:-OpenWrt}" "$lanaddr"
 514         }
 515
 516         service_start /usr/sbin/dnsmasq -C $CONFIGFILE && {
 517                 rm -f /tmp/resolv.conf
 518                 [ $ADD_LOCAL_DOMAIN -eq 1 ] && [ -n "$DOMAIN" ] && {
 519                         echo "search $DOMAIN" >> /tmp/resolv.conf
 520                 }
 521                 DNS_SERVERS="$DNS_SERVERS 127.0.0.1"
 522                 for DNS_SERVER in $DNS_SERVERS ; do
 523                         echo "nameserver $DNS_SERVER" >> /tmp/resolv.conf
 524                 done
 525         }
 526 }
 527
 528 stop() {
 529         service_stop /usr/sbin/dnsmasq && {
 530                 [ -f /tmp/resolv.conf ] && {
 531                         rm -f /tmp/resolv.conf
 532                         ln -s /tmp/resolv.conf.auto /tmp/resolv.conf
 533                 }
 534         }
 535 }