package/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=$1"
  56 }
  57
  58 append_interface() {
  59         local ifname=$(uci_get_state network "$1" ifname "$1")
  60         xappend "--interface=$ifname"
  61 }
  62
  63 append_notinterface() {
  64         local ifname=$(uci_get_state network "$1" ifname "$1")
  65         xappend "--except-interface=$ifname"
  66 }
  67
  68 append_addnhosts() {
  69         xappend "--addn-hosts=$1"
  70 }
  71
  72 append_bogusnxdomain() {
  73        xappend "--bogus-nxdomain=$1"
  74 }
  75
  76 dnsmasq() {
  77         local cfg="$1"
  78         append_bool "$cfg" authoritative "--dhcp-authoritative"
  79         append_bool "$cfg" nodaemon "--no-daemon"
  80         append_bool "$cfg" domainneeded "--domain-needed"
  81         append_bool "$cfg" filterwin2k "--filterwin2k"
  82         append_bool "$cfg" nohosts "--no-hosts"
  83         append_bool "$cfg" nonegcache "--no-negcache"
  84         append_bool "$cfg" strictorder "--strict-order"
  85         append_bool "$cfg" logqueries "--log-queries"
  86         append_bool "$cfg" noresolv "--no-resolv"
  87         append_bool "$cfg" localise_queries "--localise-queries"
  88         append_bool "$cfg" readethers "--read-ethers"
  89         append_bool "$cfg" dbus "--enable-dbus"
  90         append_bool "$cfg" boguspriv "--bogus-priv"
  91         append_bool "$cfg" expandhosts "--expand-hosts"
  92         append_bool "$cfg" enable_tftp "--enable-tftp"
  93         append_bool "$cfg" nonwildcard "--bind-interfaces"
  94         append_bool "$cfg" fqdn "--dhcp-fqdn"
  95
  96         append_parm "$cfg" dhcpscript "--dhcp-script"
  97         append_parm "$cfg" cachesize "--cache-size"
  98         append_parm "$cfg" dnsforwardmax "--dns-forward-max"
  99         append_parm "$cfg" port "--port"
 100         append_parm "$cfg" ednspacket_max "--edns-packet-max"
 101         append_parm "$cfg" dhcpleasemax "--dhcp-lease-max"
 102         append_parm "$cfg" "queryport" "--query-port"
 103         append_parm "$cfg" "domain" "--domain"
 104         append_parm "$cfg" "local" "--server"
 105         config_list_foreach "$cfg" "server" append_server
 106         config_list_foreach "$cfg" "interface" append_interface
 107         config_list_foreach "$cfg" "notinterface" append_notinterface
 108         config_list_foreach "$cfg" "addnhosts" append_addnhosts
 109         config_list_foreach "$cfg" "bogusnxdomain" append_bogusnxdomain
 110         append_parm "$cfg" "leasefile" "--dhcp-leasefile"
 111         append_parm "$cfg" "resolvfile" "--resolv-file"
 112         append_parm "$cfg" "tftp_root" "--tftp-root"
 113         append_parm "$cfg" "dhcp_boot" "--dhcp-boot"
 114         append_parm "$cfg" "local_ttl" "--local-ttl"
 115
 116         config_get DOMAIN "$cfg" domain
 117
 118         config_get_bool ADD_LOCAL_DOMAIN "$cfg" add_local_domain 1
 119         config_get_bool ADD_LOCAL_HOSTNAME "$cfg" add_local_hostname 1
 120
 121         config_get_bool readethers "$cfg" readethers
 122         [ "$readethers" = "1" -a \! -e "/etc/ethers" ] && touch /etc/ethers
 123
 124         config_get leasefile $cfg leasefile
 125         [ -n "$leasefile" -a \! -e "$leasefile" ] && touch "$leasefile"
 126         config_get_bool cachelocal "$cfg" cachelocal 1
 127
 128         config_get hostsfile "$cfg" dhcphostsfile
 129         [ -e "$hostsfile" ] && xappend "--dhcp-hostsfile=$hostsfile"
 130
 131         local rebind
 132         config_get_bool rebind "$cfg" rebind_protection 1
 133         [ $rebind -gt 0 ] && {
 134                 logger -t dnsmasq \
 135                         "DNS rebinding protection is active," \
 136                         "will discard upstream RFC1918 responses!"
 137                 xappend "--stop-dns-rebind"
 138
 139                 local rebind_localhost
 140                 config_get_bool rebind_localhost "$cfg" rebind_localhost 0
 141                 [ $rebind_localhost -gt 0 ] && {
 142                         logger -t dnsmasq "Allowing 127.0.0.0/8 responses"
 143                         xappend "--rebind-localhost-ok"
 144                 }
 145
 146                 append_rebind_domain() {
 147                         logger -t dnsmasq "Allowing RFC1918 responses for domain $1"
 148                         xappend "--rebind-domain-ok=$1"
 149                 }
 150
 151                 config_list_foreach "$cfg" rebind_domain append_rebind_domain
 152         }
 153
 154         dhcp_option_add "$cfg" "" 0
 155
 156         echo >> $CONFIGFILE
 157 }
 158
 159 dhcp_subscrid_add() {
 160         local cfg="$1"
 161
 162         config_get networkid "$cfg" networkid
 163         [ -n "$networkid" ] || return 0
 164
 165         config_get subscriberid "$cfg" subscriberid
 166         [ -n "$subscriberid" ] || return 0
 167
 168         xappend "--dhcp-subscrid=$networkid,$subscriberid"
 169
 170         config_get_bool force "$cfg" force 0
 171
 172         dhcp_option_add "$cfg" "$networkid" "$force"
 173 }
 174
 175 dhcp_remoteid_add() {
 176         local cfg="$1"
 177
 178         config_get networkid "$cfg" networkid
 179         [ -n "$networkid" ] || return 0
 180
 181         config_get remoteid "$cfg" remoteid
 182         [ -n "$remoteid" ] || return 0
 183
 184         xappend "--dhcp-remoteid=$networkid,$remoteid"
 185
 186         config_get_bool force "$cfg" force 0
 187
 188         dhcp_option_add "$cfg" "$networkid" "$force"
 189 }
 190
 191 dhcp_circuitid_add() {
 192         local cfg="$1"
 193
 194         config_get networkid "$cfg" networkid
 195         [ -n "$networkid" ] || return 0
 196
 197         config_get circuitid "$cfg" circuitid
 198         [ -n "$circuitid" ] || return 0
 199
 200         xappend "--dhcp-circuitid=$networkid,$circuitid"
 201
 202         config_get_bool force "$cfg" force 0
 203
 204         dhcp_option_add "$cfg" "$networkid" "$force"
 205 }
 206
 207 dhcp_userclass_add() {
 208         local cfg="$1"
 209
 210         config_get networkid "$cfg" networkid
 211         [ -n "$networkid" ] || return 0
 212
 213         config_get userclass "$cfg" userclass
 214         [ -n "$userclass" ] || return 0
 215
 216         xappend "--dhcp-userclass=$networkid,$userclass"
 217
 218         config_get_bool force "$cfg" force 0
 219
 220         dhcp_option_add "$cfg" "$networkid" "$force"
 221 }
 222
 223 dhcp_vendorclass_add() {
 224         local cfg="$1"
 225
 226         config_get networkid "$cfg" networkid
 227         [ -n "$networkid" ] || return 0
 228
 229         config_get vendorclass "$cfg" vendorclass
 230         [ -n "$vendorclass" ] || return 0
 231
 232         xappend "--dhcp-vendorclass=$networkid,$vendorclass"
 233
 234         config_get_bool force "$cfg" force 0
 235
 236         dhcp_option_add "$cfg" "$networkid" "$force"
 237 }
 238
 239 dhcp_host_add() {
 240         local cfg="$1"
 241
 242         config_get_bool force "$cfg" force 0
 243
 244         config_get networkid "$cfg" networkid
 245         [ -n "$networkid" ] && dhcp_option_add "$cfg" "$networkid" "$force"
 246
 247         config_get name "$cfg" name
 248         config_get ip "$cfg" ip
 249         [ -n "$ip" -o -n "$name" ] || return 0
 250
 251         macs=""
 252         config_get mac "$cfg" mac
 253         for m in $mac; do append macs "$m" ","; done
 254         [ -n "$macs" ] || return 0
 255
 256         config_get tag "$cfg" tag
 257
 258         xappend "--dhcp-host=$macs${networkid:+,net:$networkid}${tag:+,set:$tag}${ip:+,$ip}${name:+,$name}"
 259 }
 260
 261 dhcp_tag_add() {
 262         local cfg="$1"
 263
 264         tag="$cfg"
 265
 266         [ -n "$tag" ] || return 0
 267
 268         config_get_bool force "$cfg" force 0
 269         [ "$force" = "0" ] && force=
 270
 271         config_get option "$cfg" dhcp_option
 272         for o in $option; do
 273                 xappend "--dhcp-option${force:+-force}=tag:$tag,$o"
 274         done
 275 }
 276
 277 dhcp_mac_add() {
 278         local cfg="$1"
 279
 280         config_get networkid "$cfg" networkid
 281         [ -n "$networkid" ] || return 0
 282
 283         config_get mac "$cfg" mac
 284         [ -n "$mac" ] || return 0
 285
 286         xappend "--dhcp-mac=$networkid,$mac"
 287
 288         dhcp_option_add "$cfg" "$networkid"
 289 }
 290
 291 dhcp_boot_add() {
 292         local cfg="$1"
 293
 294         config_get networkid "$cfg" networkid
 295
 296         config_get filename "$cfg" filename
 297         [ -n "$filename" ] || return 0
 298
 299         config_get servername "$cfg" servername
 300         [ -n "$servername" ] || return 0
 301
 302         config_get serveraddress "$cfg" serveraddress
 303         [ -n "$serveraddress" ] || return 0
 304
 305         xappend "--dhcp-boot=${networkid:+net:$networkid,}$filename,$servername,$serveraddress"
 306
 307         config_get_bool force "$cfg" force 0
 308
 309         dhcp_option_add "$cfg" "$networkid" "$force"
 310 }
 311
 312
 313 dhcp_add() {
 314         local cfg="$1"
 315         config_get net "$cfg" interface
 316         [ -n "$net" ] || return 0
 317
 318         config_get networkid "$cfg" networkid
 319         [ -n "$networkid" ] || networkid="$net"
 320
 321         config_get ifname "$net" ifname
 322         [ -n "$ifname" ] || return 0
 323
 324         config_get dnsserver "$net" dns
 325         [ "$cachelocal" = "0" -a -n "$dnsserver" ] && {
 326                 DNS_SERVERS="$DNS_SERVERS $dnsserver"
 327         }
 328
 329         append_bool "$cfg" ignore "--no-dhcp-interface=$ifname" && return 0
 330
 331         config_get proto "$net" proto
 332         [ static = "$proto" ] || return 0
 333
 334         config_get ipaddr "$net" ipaddr
 335         config_get netmask "$cfg" netmask
 336         [ -n "$netmask" ] || config_get netmask "$net" netmask
 337
 338         #check for an already active dhcp server on the interface, unless 'force' is set
 339         config_get_bool force "$cfg" force 0
 340         [ $force -gt 0 ] || {
 341                 udhcpc -n -q -s /bin/true -t 1 -i $ifname >&- && {
 342                         logger -t dnsmasq \
 343                                 "found already running DHCP-server on interface '$ifname'" \
 344                                 "refusing to start, use 'option force 1' to override"
 345                         return 0
 346                 }
 347         }
 348
 349         config_get start "$cfg" start
 350         config_get limit "$cfg" limit
 351         config_get leasetime "$cfg" leasetime
 352         config_get options "$cfg" options
 353         config_get_bool dynamicdhcp "$cfg" dynamicdhcp 1
 354
 355         leasetime="${leasetime:-12h}"
 356         start="$(dhcp_calc "${start:-100}")"
 357         limit="${limit:-150}"
 358         [ "$limit" -gt 0 ] && limit=$((limit-1))
 359         eval "$(ipcalc.sh $ipaddr $netmask $start $limit)"
 360         if [ "$dynamicdhcp" = "0" ]; then END="static"; fi
 361         xappend "--dhcp-range=$networkid,$START,$END,$NETMASK,$leasetime${options:+ $options}"
 362
 363         dhcp_option_add "$cfg" "$networkid"
 364 }
 365
 366 dhcp_option_add() {
 367         local cfg="$1"
 368         local networkid="$2"
 369         local force="$3"
 370
 371         [ "$force" = "0" ] && force=
 372
 373         config_get dhcp_option "$cfg" dhcp_option
 374         for o in $dhcp_option; do
 375                 xappend "--dhcp-option${force:+-force}=${networkid:+$networkid,}$o"
 376         done
 377
 378 }
 379
 380 dhcp_domain_add() {
 381         local cfg="$1"
 382         local ip name names
 383
 384         config_get names "$cfg" name "$2"
 385         [ -n "$names" ] || return 0
 386
 387         config_get ip "$cfg" ip "$3"
 388         [ -n "$ip" ] || return 0
 389
 390         local oIFS="$IFS"; IFS="."; set -- $ip; IFS="$oIFS"
 391         local raddr="${4:+$4.$3.$2.$1.in-addr.arpa}"
 392
 393         for name in $names; do
 394                 local fqdn="$name"
 395
 396                 [ "${fqdn%.*}" == "$fqdn" ] && \
 397                         fqdn="$fqdn${DOMAIN:+.$DOMAIN}"
 398
 399                 xappend "--address=/$fqdn/$ip"
 400
 401                 [ -n "$raddr" ] && {
 402                         xappend "--ptr-record=$raddr,$fqdn"
 403                         raddr=""
 404                 }
 405         done
 406 }
 407
 408 dhcp_srv_add() {
 409         local cfg="$1"
 410
 411         config_get srv "$cfg" srv
 412         [ -n "$srv" ] || return 0
 413
 414         config_get target "$cfg" target
 415         [ -n "$target" ] || return 0
 416
 417         config_get port "$cfg" port
 418         [ -n "$port" ] || return 0
 419
 420         config_get class "$cfg" class
 421         config_get weight "$cfg" weight
 422
 423         local service="$srv,$target,$port${class:+,$class${weight:+,$weight}}"
 424
 425         xappend "--srv-host=$service"
 426 }
 427
 428 dhcp_mx_add() {
 429         local cfg="$1"
 430         local domain relay pref
 431
 432         config_get domain "$cfg" domain
 433         [ -n "$domain" ] || return 0
 434
 435         config_get relay "$cfg" relay
 436         [ -n "$relay" ] || return 0
 437
 438         config_get pref "$cfg" pref 0
 439
 440         local service="$domain,$relay,$pref"
 441
 442         xappend "--mx-host=$service"
 443 }
 444
 445 dhcp_cname_add() {
 446         local cfg="$1"
 447         local cname target
 448
 449         config_get cname "$cfg" cname
 450         [ -n "$cname" ] || return 0
 451
 452         config_get target "$cfg" target
 453         [ -n "$target" ] || return 0
 454
 455         xappend "--cname=${cname},${target}"
 456 }
 457
 458 start() {
 459         include /lib/network
 460         scan_interfaces
 461
 462         local lanaddr
 463         config_get lanaddr "lan" ipaddr
 464
 465         config_load dhcp
 466
 467         # before we can call xappend
 468         mkdir -p $(dirname $CONFIGFILE)
 469
 470         echo "# auto-generated config file from /etc/config/dhcp" > $CONFIGFILE
 471
 472         # if we did this last, we could override auto-generated config
 473         [ -f /etc/dnsmasq.conf ] && {
 474                 xappend "--conf-file=/etc/dnsmasq.conf"
 475         }
 476
 477         args=""
 478         config_foreach dnsmasq dnsmasq
 479         config_foreach dhcp_host_add host
 480         echo >> $CONFIGFILE
 481         config_foreach dhcp_boot_add boot
 482         config_foreach dhcp_mac_add mac
 483         config_foreach dhcp_tag_add tag
 484         config_foreach dhcp_vendorclass_add vendorclass
 485         config_foreach dhcp_userclass_add userclass
 486         config_foreach dhcp_circuitid_add circuitid
 487         config_foreach dhcp_remoteid_add remoteid
 488         config_foreach dhcp_subscrid_add subscrid
 489         config_foreach dhcp_domain_add domain
 490         echo >> $CONFIGFILE
 491         config_foreach dhcp_srv_add srvhost
 492         config_foreach dhcp_mx_add mxhost
 493         echo >> $CONFIGFILE
 494         config_foreach dhcp_add dhcp
 495         echo >> $CONFIGFILE
 496         config_foreach dhcp_cname_add cname
 497         echo >> $CONFIGFILE
 498
 499         # add own hostname
 500         [ $ADD_LOCAL_HOSTNAME -eq 1 ] && [ -n "$lanaddr" ] && {
 501                 local hostname="$(uci_get system.@system[0].hostname)"
 502                 dhcp_domain_add "" "${hostname:-OpenWrt}" "$lanaddr"
 503         }
 504
 505         service_start /usr/sbin/dnsmasq -C $CONFIGFILE && {
 506                 rm -f /tmp/resolv.conf
 507                 [ $ADD_LOCAL_DOMAIN -eq 1 ] && [ -n "$DOMAIN" ] && {
 508                         echo "search $DOMAIN" >> /tmp/resolv.conf
 509                 }
 510                 DNS_SERVERS="$DNS_SERVERS 127.0.0.1"
 511                 for DNS_SERVER in $DNS_SERVERS ; do
 512                         echo "nameserver $DNS_SERVER" >> /tmp/resolv.conf
 513                 done
 514         }
 515 }
 516
 517 stop() {
 518         service_stop /usr/sbin/dnsmasq && {
 519                 [ -f /tmp/resolv.conf ] && {
 520                         rm -f /tmp/resolv.conf
 521                         ln -s /tmp/resolv.conf.auto /tmp/resolv.conf
 522                 }
 523         }
 524 }