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