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