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         dhcp_option_add "$cfg" "" 0
 147
 148         echo >> $CONFIGFILE
 149 }
 150
 151 dhcp_subscrid_add() {
 152         local cfg="$1"
 153
 154         config_get networkid "$cfg" networkid
 155         [ -n "$networkid" ] || return 0
 156
 157         config_get subscriberid "$cfg" subscriberid
 158         [ -n "$subscriberid" ] || return 0
 159
 160         xappend "--dhcp-subscrid=$networkid,$subscriberid"
 161
 162         config_get_bool force "$cfg" force 0
 163
 164         dhcp_option_add "$cfg" "$networkid" "$force"
 165 }
 166
 167 dhcp_remoteid_add() {
 168         local cfg="$1"
 169
 170         config_get networkid "$cfg" networkid
 171         [ -n "$networkid" ] || return 0
 172
 173         config_get remoteid "$cfg" remoteid
 174         [ -n "$remoteid" ] || return 0
 175
 176         xappend "--dhcp-remoteid=$networkid,$remoteid"
 177
 178         config_get_bool force "$cfg" force 0
 179
 180         dhcp_option_add "$cfg" "$networkid" "$force"
 181 }
 182
 183 dhcp_circuitid_add() {
 184         local cfg="$1"
 185
 186         config_get networkid "$cfg" networkid
 187         [ -n "$networkid" ] || return 0
 188
 189         config_get circuitid "$cfg" circuitid
 190         [ -n "$circuitid" ] || return 0
 191
 192         xappend "--dhcp-circuitid=$networkid,$circuitid"
 193
 194         config_get_bool force "$cfg" force 0
 195
 196         dhcp_option_add "$cfg" "$networkid" "$force"
 197 }
 198
 199 dhcp_userclass_add() {
 200         local cfg="$1"
 201
 202         config_get networkid "$cfg" networkid
 203         [ -n "$networkid" ] || return 0
 204
 205         config_get userclass "$cfg" userclass
 206         [ -n "$userclass" ] || return 0
 207
 208         xappend "--dhcp-userclass=$networkid,$userclass"
 209
 210         config_get_bool force "$cfg" force 0
 211
 212         dhcp_option_add "$cfg" "$networkid" "$force"
 213 }
 214
 215 dhcp_vendorclass_add() {
 216         local cfg="$1"
 217
 218         config_get networkid "$cfg" networkid
 219         [ -n "$networkid" ] || return 0
 220
 221         config_get vendorclass "$cfg" vendorclass
 222         [ -n "$vendorclass" ] || return 0
 223
 224         xappend "--dhcp-vendorclass=$networkid,$vendorclass"
 225
 226         config_get_bool force "$cfg" force 0
 227
 228         dhcp_option_add "$cfg" "$networkid" "$force"
 229 }
 230
 231 dhcp_host_add() {
 232         local cfg="$1"
 233
 234         config_get_bool force "$cfg" force 0
 235
 236         config_get networkid "$cfg" networkid
 237         [ -n "$networkid" ] && dhcp_option_add "$cfg" "$networkid" "$force"
 238
 239         config_get name "$cfg" name
 240         config_get ip "$cfg" ip
 241         [ -n "$ip" -o -n "$name" ] || return 0
 242
 243         macs=""
 244         config_get mac "$cfg" mac
 245         for m in $mac; do append macs "$m" ","; done
 246         [ -n "$macs" ] || return 0
 247
 248         config_get tag "$cfg" tag
 249
 250         xappend "--dhcp-host=$macs${networkid:+,net:$networkid}${tag:+,set:$tag}${ip:+,$ip}${name:+,$name}"
 251 }
 252
 253 dhcp_tag_add() {
 254         local cfg="$1"
 255
 256         tag="$cfg"
 257
 258         [ -n "$tag" ] || return 0
 259
 260         config_get_bool force "$cfg" force 0
 261         [ "$force" = "0" ] && force=
 262
 263         config_get option "$cfg" dhcp_option
 264         for o in $option; do
 265                 xappend "--dhcp-option${force:+-force}=tag:$tag,$o"
 266         done
 267 }
 268
 269 dhcp_mac_add() {
 270         local cfg="$1"
 271
 272         config_get networkid "$cfg" networkid
 273         [ -n "$networkid" ] || return 0
 274
 275         config_get mac "$cfg" mac
 276         [ -n "$mac" ] || return 0
 277
 278         xappend "--dhcp-mac=$networkid,$mac"
 279
 280         dhcp_option_add "$cfg" "$networkid"
 281 }
 282
 283 dhcp_boot_add() {
 284         local cfg="$1"
 285
 286         config_get networkid "$cfg" networkid
 287
 288         config_get filename "$cfg" filename
 289         [ -n "$filename" ] || return 0
 290
 291         config_get servername "$cfg" servername
 292         [ -n "$servername" ] || return 0
 293
 294         config_get serveraddress "$cfg" serveraddress
 295         [ -n "$serveraddress" ] || return 0
 296
 297         xappend "--dhcp-boot=${networkid:+net:$networkid,}$filename,$servername,$serveraddress"
 298
 299         config_get_bool force "$cfg" force 0
 300
 301         dhcp_option_add "$cfg" "$networkid" "$force"
 302 }
 303
 304
 305 dhcp_add() {
 306         local cfg="$1"
 307         config_get net "$cfg" interface
 308         [ -n "$net" ] || return 0
 309
 310         config_get networkid "$cfg" networkid
 311         [ -n "$networkid" ] || networkid="$net"
 312
 313         config_get ifname "$net" ifname
 314         [ -n "$ifname" ] || return 0
 315
 316         config_get dnsserver "$net" dns
 317         [ "$cachelocal" = "0" -a -n "$dnsserver" ] && {
 318                 DNS_SERVERS="$DNS_SERVERS $dnsserver"
 319         }
 320
 321         append_bool "$cfg" ignore "--no-dhcp-interface=$ifname" && return 0
 322
 323         config_get proto "$net" proto
 324         [ static = "$proto" ] || return 0
 325
 326         config_get ipaddr "$net" ipaddr
 327         config_get netmask "$cfg" netmask
 328         [ -n "$netmask" ] || config_get netmask "$net" netmask
 329
 330         #check for an already active dhcp server on the interface, unless 'force' is set
 331         config_get_bool force "$cfg" force 0
 332         [ $force -gt 0 ] || {
 333                 udhcpc -n -q -s /bin/true -t 1 -i $ifname >&- && {
 334                         logger -t dnsmasq \
 335                                 "found already running DHCP-server on interface '$ifname'" \
 336                                 "refusing to start, use 'option force 1' to override"
 337                         return 0
 338                 }
 339         }
 340
 341         config_get start "$cfg" start
 342         config_get limit "$cfg" limit
 343         config_get leasetime "$cfg" leasetime
 344         config_get options "$cfg" options
 345         config_get_bool dynamicdhcp "$cfg" dynamicdhcp 1
 346
 347         leasetime="${leasetime:-12h}"
 348         start="$(dhcp_calc "${start:-100}")"
 349         limit="${limit:-150}"
 350         [ "$limit" -gt 0 ] && limit=$((limit-1))
 351         eval "$(ipcalc.sh $ipaddr $netmask $start $limit)"
 352         if [ "$dynamicdhcp" = "0" ]; then END="static"; fi
 353         xappend "--dhcp-range=$networkid,$START,$END,$NETMASK,$leasetime${options:+ $options}"
 354
 355         dhcp_option_add "$cfg" "$networkid"
 356 }
 357
 358 dhcp_option_add() {
 359         local cfg="$1"
 360         local networkid="$2"
 361         local force="$3"
 362
 363         [ "$force" = "0" ] && force=
 364
 365         config_get dhcp_option "$cfg" dhcp_option
 366         for o in $dhcp_option; do
 367                 xappend "--dhcp-option${force:+-force}=${networkid:+$networkid,}$o"
 368         done
 369
 370 }
 371
 372 dhcp_domain_add() {
 373         local cfg="$1"
 374         local ip name names
 375
 376         config_get names "$cfg" name "$2"
 377         [ -n "$names" ] || return 0
 378
 379         config_get ip "$cfg" ip "$3"
 380         [ -n "$ip" ] || return 0
 381
 382         local oIFS="$IFS"; IFS="."; set -- $ip; IFS="$oIFS"
 383         local raddr="${4:+$4.$3.$2.$1.in-addr.arpa}"
 384
 385         for name in $names; do
 386                 local fqdn="$name"
 387
 388                 [ "${fqdn%.*}" == "$fqdn" ] && \
 389                         fqdn="$fqdn${DOMAIN:+.$DOMAIN}"
 390
 391                 xappend "--address=/$fqdn/$ip"
 392
 393                 [ -n "$raddr" ] && {
 394                         xappend "--ptr-record=$raddr,$fqdn"
 395                         raddr=""
 396                 }
 397         done
 398 }
 399
 400 dhcp_srv_add() {
 401         local cfg="$1"
 402
 403         config_get srv "$cfg" srv
 404         [ -n "$srv" ] || return 0
 405
 406         config_get target "$cfg" target
 407         [ -n "$target" ] || return 0
 408
 409         config_get port "$cfg" port
 410         [ -n "$port" ] || return 0
 411
 412         config_get class "$cfg" class
 413         config_get weight "$cfg" weight
 414
 415         local service="$srv,$target,$port${class:+,$class${weight:+,$weight}}"
 416
 417         xappend "--srv-host=$service"
 418 }
 419
 420 dhcp_mx_add() {
 421         local cfg="$1"
 422         local domain relay pref
 423
 424         config_get domain "$cfg" domain
 425         [ -n "$domain" ] || return 0
 426
 427         config_get relay "$cfg" relay
 428         [ -n "$relay" ] || return 0
 429
 430         config_get pref "$cfg" pref 0
 431
 432         local service="$domain,$relay,$pref"
 433
 434         xappend "--mx-host=$service"
 435 }
 436
 437 dhcp_cname_add() {
 438         local cfg="$1"
 439         local cname target
 440
 441         config_get cname "$cfg" cname
 442         [ -n "$cname" ] || return 0
 443
 444         config_get target "$cfg" target
 445         [ -n "$target" ] || return 0
 446
 447         xappend "--cname=${cname},${target}"
 448 }
 449
 450 start() {
 451         include /lib/network
 452         scan_interfaces
 453
 454         local lanaddr
 455         config_get lanaddr "lan" ipaddr
 456
 457         config_load dhcp
 458
 459         # before we can call xappend
 460         mkdir -p $(dirname $CONFIGFILE)
 461
 462         echo "# auto-generated config file from /etc/config/dhcp" > $CONFIGFILE
 463
 464         # if we did this last, we could override auto-generated config
 465         [ -f /etc/dnsmasq.conf ] && {
 466                 xappend "--conf-file=/etc/dnsmasq.conf"
 467         }
 468
 469         args=""
 470         config_foreach dnsmasq dnsmasq
 471         config_foreach dhcp_host_add host
 472         echo >> $CONFIGFILE
 473         config_foreach dhcp_boot_add boot
 474         config_foreach dhcp_mac_add mac
 475         config_foreach dhcp_tag_add tag
 476         config_foreach dhcp_vendorclass_add vendorclass
 477         config_foreach dhcp_userclass_add userclass
 478         config_foreach dhcp_circuitid_add circuitid
 479         config_foreach dhcp_remoteid_add remoteid
 480         config_foreach dhcp_subscrid_add subscrid
 481         config_foreach dhcp_domain_add domain
 482         echo >> $CONFIGFILE
 483         config_foreach dhcp_srv_add srvhost
 484         config_foreach dhcp_mx_add mxhost
 485         echo >> $CONFIGFILE
 486         config_foreach dhcp_add dhcp
 487         echo >> $CONFIGFILE
 488         config_foreach dhcp_cname_add cname
 489         echo >> $CONFIGFILE
 490
 491         # add own hostname
 492         [ -z "$lanaddr" ] || {
 493                 local hostname="$(uci_get system.@system[0].hostname)"
 494                 dhcp_domain_add "" "${hostname:-OpenWrt}" "$lanaddr"
 495         }
 496
 497         service_start /usr/sbin/dnsmasq -C $CONFIGFILE && {
 498                 rm -f /tmp/resolv.conf
 499                 [ -n "$DOMAIN" ] && echo "search $DOMAIN" >> /tmp/resolv.conf
 500                 DNS_SERVERS="$DNS_SERVERS 127.0.0.1"
 501                 for DNS_SERVER in $DNS_SERVERS ; do
 502                         echo "nameserver $DNS_SERVER" >> /tmp/resolv.conf
 503                 done
 504         }
 505 }
 506
 507 stop() {
 508         service_stop /usr/sbin/dnsmasq && {
 509                 [ -f /tmp/resolv.conf ] && {
 510                         rm -f /tmp/resolv.conf
 511                         ln -s /tmp/resolv.conf.auto /tmp/resolv.conf
 512                 }
 513         }
 514 }