package/network/services/dnsmasq/files/dnsmasq.init

   1 #!/bin/sh /etc/rc.common
   2 # Copyright (C) 2007-2012 OpenWrt.org
   3
   4 START=19
   5
   6 USE_PROCD=1
   7 PROG=/usr/sbin/dnsmasq
   8
   9 ADD_LOCAL_DOMAIN=1
  10 ADD_LOCAL_HOSTNAME=1
  11 ADD_WAN_FQDN=0
  12 ADD_LOCAL_FQDN=""
  13
  14 BASECONFIGFILE="/var/etc/dnsmasq.conf"
  15 BASEHOSTFILE="/tmp/hosts/dhcp"
  16 BASETIMESTAMPFILE="/etc/dnsmasq.time"
  17 TRUSTANCHORSFILE="/usr/share/dnsmasq/trust-anchors.conf"
  18 TIMEVALIDFILE="/var/state/dnsmasqsec"
  19 BASEDHCPSTAMPFILE="/var/run/dnsmasq"
  20 RFC6761FILE="/usr/share/dnsmasq/rfc6761.conf"
  21
  22 DNSMASQ_DHCP_VER=4
  23
  24 xappend() {
  25         local value="$1"
  26
  27         echo "${value#--}" >> $CONFIGFILE_TMP
  28 }
  29
  30 hex_to_hostid() {
  31         local var="$1"
  32         local hex="${2#0x}" # strip optional "0x" prefix
  33
  34         if [ -n "${hex//[0-9a-fA-F]/}" ]; then
  35                 # is invalid hex literal
  36                 return 1
  37         fi
  38
  39         # convert into host id
  40         export "$var=$(
  41                 printf "%0x:%0x" \
  42                 $(((0x$hex >> 16) % 65536)) \
  43                 $(( 0x$hex        % 65536))
  44                 )"
  45
  46         return 0
  47 }
  48
  49 dhcp_calc() {
  50         local ip="$1"
  51         local res=0
  52
  53         while [ -n "$ip" ]; do
  54                 part="${ip%%.*}"
  55                 res="$(($res * 256))"
  56                 res="$(($res + $part))"
  57                 [ "${ip%.*}" != "$ip" ] && ip="${ip#*.}" || ip=
  58         done
  59         echo "$res"
  60 }
  61
  62 dhcp_check() {
  63         local ifname="$1"
  64         local stamp="${BASEDHCPSTAMPFILE_CFG}.${ifname}.dhcp"
  65         local rv=0
  66
  67         [ -s "$stamp" ] && return $(cat "$stamp")
  68
  69         # If there's no carrier yet, skip this interface.
  70         # The init script will be called again once the link is up
  71         case "$(devstatus "$ifname" | jsonfilter -e @.carrier)" in
  72                 false) return 1;;
  73         esac
  74
  75         udhcpc -n -q -s /bin/true -t 1 -i "$ifname" >&- && rv=1 || rv=0
  76
  77         [ $rv -eq 1 ] && \
  78                 logger -t dnsmasq \
  79                         "found already running DHCP-server on interface '$ifname'" \
  80                         "refusing to start, use 'option force 1' to override"
  81
  82         echo $rv > "$stamp"
  83         return $rv
  84 }
  85
  86 log_once() {
  87         pidof dnsmasq >/dev/null || \
  88                 logger -t dnsmasq "$@"
  89 }
  90
  91 append_bool() {
  92         local section="$1"
  93         local option="$2"
  94         local value="$3"
  95         local _loctmp
  96         config_get_bool _loctmp "$section" "$option" 0
  97         [ $_loctmp -gt 0 ] && xappend "$value"
  98 }
  99
 100 append_parm() {
 101         local section="$1"
 102         local option="$2"
 103         local switch="$3"
 104         local default="$4"
 105         local _loctmp
 106         config_get _loctmp "$section" "$option" "$default"
 107         [ -z "$_loctmp" ] && return 0
 108         xappend "$switch=$_loctmp"
 109 }
 110
 111 append_server() {
 112         xappend "--server=$1"
 113 }
 114
 115 append_address() {
 116         xappend "--address=$1"
 117 }
 118
 119 append_ipset() {
 120         xappend "--ipset=$1"
 121 }
 122
 123 append_interface() {
 124         network_get_device ifname "$1" || return
 125         xappend "--interface=$ifname"
 126 }
 127
 128 append_notinterface() {
 129         network_get_device ifname "$1" || return
 130         xappend "--except-interface=$ifname"
 131 }
 132
 133 append_addnhosts() {
 134         xappend "--addn-hosts=$1"
 135 }
 136
 137 append_bogusnxdomain() {
 138         xappend "--bogus-nxdomain=$1"
 139 }
 140
 141 append_pxe_service() {
 142         xappend "--pxe-service=$1"
 143 }
 144
 145 append_interface_name() {
 146         xappend "--interface-name=$1,$2"
 147 }
 148
 149 filter_dnsmasq() {
 150         local cfg="$1" func="$2" match_cfg="$3" found_cfg
 151
 152         # use entry when no instance entry set, or if it matches
 153         config_get found_cfg "$cfg" "instance"
 154         if [ -z "$found_cfg" -o "$found_cfg" = "$match_cfg" ]; then
 155                 $func $cfg
 156         fi
 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         # TODO: DHCPV6 does not have circuitid; catch "option6:"
 193         local cfg="$1"
 194
 195         config_get networkid "$cfg" networkid
 196         [ -n "$networkid" ] || return 0
 197
 198         config_get circuitid "$cfg" circuitid
 199         [ -n "$circuitid" ] || return 0
 200
 201         xappend "--dhcp-circuitid=$networkid,$circuitid"
 202
 203         config_get_bool force "$cfg" force 0
 204
 205         dhcp_option_add "$cfg" "$networkid" "$force"
 206 }
 207
 208 dhcp_userclass_add() {
 209         local cfg="$1"
 210
 211         config_get networkid "$cfg" networkid
 212         [ -n "$networkid" ] || return 0
 213
 214         config_get userclass "$cfg" userclass
 215         [ -n "$userclass" ] || return 0
 216
 217         xappend "--dhcp-userclass=$networkid,$userclass"
 218
 219         config_get_bool force "$cfg" force 0
 220
 221         dhcp_option_add "$cfg" "$networkid" "$force"
 222 }
 223
 224 dhcp_vendorclass_add() {
 225         # TODO: DHCPV6 vendor class has stricter definitions; catch? fixup?
 226         local cfg="$1"
 227
 228         config_get networkid "$cfg" networkid
 229         [ -n "$networkid" ] || return 0
 230
 231         config_get vendorclass "$cfg" vendorclass
 232         [ -n "$vendorclass" ] || return 0
 233
 234         xappend "--dhcp-vendorclass=$networkid,$vendorclass"
 235
 236         config_get_bool force "$cfg" force 0
 237
 238         dhcp_option_add "$cfg" "$networkid" "$force"
 239 }
 240
 241 dhcp_match_add() {
 242         local cfg="$1"
 243
 244         config_get networkid "$cfg" networkid
 245         [ -n "$networkid" ] || return 0
 246
 247         config_get match "$cfg" match
 248         [ -n "$match" ] || return 0
 249
 250         xappend "--dhcp-match=$networkid,$match"
 251
 252         config_get_bool force "$cfg" force 0
 253
 254         dhcp_option_add "$cfg" "$networkid" "$force"
 255 }
 256
 257 dhcp_host_add() {
 258         local cfg="$1"
 259         local hosttag nametime addrs
 260
 261         config_get_bool force "$cfg" force 0
 262
 263         config_get networkid "$cfg" networkid
 264         [ -n "$networkid" ] && dhcp_option_add "$cfg" "$networkid" "$force"
 265
 266         config_get_bool enable "$cfg" enable 1
 267         [ "$enable" = "0" ] && return 0
 268
 269         config_get name "$cfg" name
 270         config_get ip "$cfg" ip
 271         config_get hostid "$cfg" hostid
 272
 273         [ -n "$ip" -o -n "$name" -o -n "$hostid" ] || return 0
 274
 275         config_get_bool dns "$cfg" dns 0
 276         [ "$dns" = "1" -a -n "$ip" -a -n "$name" ] && {
 277                 echo "$ip $name${DOMAIN:+.$DOMAIN}" >> $HOSTFILE
 278         }
 279
 280         config_get mac "$cfg" mac
 281         config_get duid "$cfg" duid
 282         config_get tag "$cfg" tag
 283
 284         if [ -n "$mac" ]; then
 285                 # --dhcp-host=00:20:e0:3b:13:af,192.168.0.199,lap
 286                 # many MAC are possible to track a laptop ON/OFF dock
 287                 macs=""
 288                 for m in $mac; do append macs "$m" ","; done
 289         fi
 290
 291         if [ $DNSMASQ_DHCP_VER -eq 6 -a -n "$duid" ]; then
 292                 # --dhcp-host=id:00:03:00:01:12:00:00:01:02:03,[::beef],lap
 293                 # one (virtual) machine gets one DUID per RFC3315
 294                 duids="id:${duid// */}"
 295         fi
 296
 297         if [ -z "$macs" -a -z "$duids" ]; then
 298                 # --dhcp-host=lap,192.168.0.199,[::beef]
 299                 [ -n "$name" ] || return 0
 300                 macs="$name"
 301                 name=""
 302         fi
 303
 304         if [ -n "$hostid" ]; then
 305                         hex_to_hostid hostid "$hostid"
 306         fi
 307
 308         config_get_bool broadcast "$cfg" broadcast 0
 309         config_get leasetime "$cfg" leasetime
 310
 311         [ "$broadcast" = "0" ] && broadcast= || broadcast=",set:needs-broadcast"
 312
 313         hosttag="${networkid:+,set:${networkid}}${tag:+,set:${tag}}$broadcast"
 314         nametime="${name:+,$name}${leasetime:+,$leasetime}"
 315
 316         if [ $DNSMASQ_DHCP_VER -eq 6 ]; then
 317                 addrs="${ip:+,$ip}${hostid:+,[::$hostid]}"
 318                 xappend "--dhcp-host=$macs${duids:+,$duids}$hosttag$addrs$nametime"
 319         else
 320                 xappend "--dhcp-host=$macs$hosttag${ip:+,$ip}$nametime"
 321         fi
 322 }
 323
 324 dhcp_this_host_add() {
 325         local net="$1"
 326         local ifname="$2"
 327         local mode="$3"
 328         local routerstub routername ifdashname
 329         local lanaddr lanaddr6 lanaddrs6 ulaprefix
 330
 331         if [ "$mode" -gt 0 ] ; then
 332                 ifdashname="${ifname//./-}"
 333                 routerstub="$( md5sum /etc/os-release )"
 334                 routerstub="router-${routerstub// */}"
 335                 routername="$( uci_get system @system[0] hostname $routerstub )"
 336
 337                 if [ "$mode" -gt 1 ] ; then
 338                         if [ "$mode" -gt 2 ] ; then
 339                                 if [ "$mode" -gt 3 ] ; then
 340                                         xappend "--interface-name=$ifdashname.$routername.$DOMAIN,$ifname"
 341                                 fi
 342
 343                                 xappend "--interface-name=$routername.$DOMAIN,$ifname"
 344                         fi
 345
 346                         # All IP addresses discovered by dnsmasq will be labeled (except fe80::)
 347                         xappend "--interface-name=$routername,$ifname"
 348
 349                 else
 350                         # This uses a static host file entry for only limited addresses.
 351                         # Use dnsmasq option "--expandhosts" to enable FQDN on host files.
 352                         ulaprefix="$(uci_get network @globals[0] ula_prefix)"
 353                         network_get_ipaddr lanaddr "$net"
 354                         network_get_ipaddrs6 lanaddrs6 "$net"
 355
 356                         if [ -n "$lanaddr" ] ; then
 357                                 dhcp_domain_add "" "$routername" "$lanaddr"
 358                         fi
 359
 360                         if [ -n "$ulaprefix" -a -n "$lanaddrs6" ] ; then
 361                                 for lanaddr6 in $lanaddrs6 ; do
 362                                         case "$lanaddr6" in
 363                                         "${ulaprefix%%:/*}"*)
 364                                                         dhcp_domain_add "" "$routername" "$lanaddr6"
 365                                                         ;;
 366                                         esac
 367                                 done
 368                         fi
 369                 fi
 370         fi
 371 }
 372
 373 dhcp_tag_add() {
 374         # NOTE: dnsmasq has explicit "option6:" prefix for DHCPv6 so no collisions
 375         local cfg="$1"
 376
 377         tag="$cfg"
 378
 379         [ -n "$tag" ] || return 0
 380
 381         config_get_bool force "$cfg" force 0
 382         [ "$force" = "0" ] && force=
 383
 384         config_get option "$cfg" dhcp_option
 385         for o in $option; do
 386                 xappend "--dhcp-option${force:+-force}=tag:$tag,$o"
 387         done
 388 }
 389
 390 dhcp_mac_add() {
 391         local cfg="$1"
 392
 393         config_get networkid "$cfg" networkid
 394         [ -n "$networkid" ] || return 0
 395
 396         config_get mac "$cfg" mac
 397         [ -n "$mac" ] || return 0
 398
 399         xappend "--dhcp-mac=$networkid,$mac"
 400
 401         dhcp_option_add "$cfg" "$networkid"
 402 }
 403
 404 dhcp_boot_add() {
 405         # TODO: BOOTURL is different between DHCPv4 and DHCPv6
 406         local cfg="$1"
 407
 408         config_get networkid "$cfg" networkid
 409
 410         config_get filename "$cfg" filename
 411         [ -n "$filename" ] || return 0
 412
 413         config_get servername "$cfg" servername
 414         config_get serveraddress "$cfg" serveraddress
 415
 416         [ -n "$serveraddress" -a ! -n "$servername" ] && return 0
 417
 418         xappend "--dhcp-boot=${networkid:+net:$networkid,}${filename}${servername:+,$servername}${serveraddress:+,$serveraddress}"
 419
 420         config_get_bool force "$cfg" force 0
 421
 422         dhcp_option_add "$cfg" "$networkid" "$force"
 423 }
 424
 425
 426 dhcp_add() {
 427         local cfg="$1"
 428         local dhcp6range="::"
 429         local nettag
 430
 431         config_get net "$cfg" interface
 432         [ -n "$net" ] || return 0
 433
 434         config_get networkid "$cfg" networkid
 435         [ -n "$networkid" ] || networkid="$net"
 436
 437         network_get_subnet subnet "$net" || return 0
 438         network_get_device ifname "$net" || return 0
 439         network_get_protocol proto "$net" || return 0
 440
 441         [ "$cachelocal" = "0" ] && network_get_dnsserver dnsserver "$net" && {
 442                 DNS_SERVERS="$DNS_SERVERS $dnsserver"
 443         }
 444
 445         append_bool "$cfg" ignore "--no-dhcp-interface=$ifname" && {
 446                 # Many ISP do not have useful names for DHCP customers (your WAN).
 447                 dhcp_this_host_add "$net" "$ifname" "$ADD_WAN_FQDN"
 448                 return 0
 449         }
 450
 451         # Do not support non-static interfaces for now
 452         [ static = "$proto" ] || return 0
 453
 454         # Override interface netmask with dhcp config if applicable
 455         config_get netmask "$cfg" netmask "${subnet##*/}"
 456
 457         #check for an already active dhcp server on the interface, unless 'force' is set
 458         config_get_bool force "$cfg" force 0
 459         [ $force -gt 0 ] || dhcp_check "$ifname" || return 0
 460
 461         config_get start "$cfg" start 100
 462         config_get limit "$cfg" limit 150
 463         config_get leasetime "$cfg" leasetime 12h
 464         config_get options "$cfg" options
 465         config_get_bool dynamicdhcp "$cfg" dynamicdhcp 1
 466
 467         config_get dhcpv4 "$cfg" dhcpv4
 468         config_get dhcpv6 "$cfg" dhcpv6
 469
 470         config_get ra "$cfg" ra
 471         config_get ra_management "$cfg" ra_management
 472         config_get ra_preference "$cfg" ra_preference
 473
 474         config_list_foreach "$cfg" "interface_name" append_interface_name "$ifname"
 475
 476         # Put the router host name on this DHCP served interface address(es)
 477         dhcp_this_host_add "$net" "$ifname" "$ADD_LOCAL_FQDN"
 478
 479         start="$( dhcp_calc "$start" )"
 480         nettag="${networkid:+set:${networkid},}"
 481
 482         if [ "$limit" -gt 0 ] ; then
 483                 limit=$((limit-1))
 484         fi
 485
 486         eval "$(ipcalc.sh "${subnet%%/*}" $netmask $start $limit)"
 487
 488         if [ "$dynamicdhcp" = "0" ] ; then
 489                 END="static"
 490                 dhcp6range="::,static"
 491         else
 492                 dhcp6range="::1000,::ffff"
 493         fi
 494
 495
 496         if [ "$dhcpv4" != "disabled" ] ; then
 497                 xappend "--dhcp-range=$nettag$START,$END,$NETMASK,$leasetime${options:+ $options}"
 498         fi
 499
 500
 501         if [ $DNSMASQ_DHCP_VER -eq 6 -a "$ra" = "server" ] ; then
 502                 # Note: dnsmasq cannot just be a DHCPv6 server (all-in-1)
 503                 # and let some other machine(s) send RA pointing to it.
 504
 505                 case $ra_preference in
 506                 *high*)
 507                         xappend "--ra-param=$ifname,high,0,7200"
 508                         ;;
 509                 *low*)
 510                         xappend "--ra-param=$ifname,low,0,7200"
 511                         ;;
 512                 *)
 513                         # Send UNSOLICITED RA at default interval and live for 2 hours.
 514                         # TODO: convert flexible lease time into route life time (only seconds).
 515                         xappend "--ra-param=$ifname,0,7200"
 516                         ;;
 517                 esac
 518
 519                 if [ "$dhcpv6" = "disabled" ] ; then
 520                         ra_management="3"
 521                 fi
 522
 523
 524                 case $ra_management in
 525                 0)
 526                         # SLACC with DCHP for extended options
 527                         xappend "--dhcp-range=$nettag::,constructor:$ifname,ra-stateless,ra-names"
 528                         ;;
 529                 2)
 530                         # DHCP address and RA only for management redirection
 531                         xappend "--dhcp-range=$nettag$dhcp6range,constructor:$ifname,$leasetime"
 532                         ;;
 533                 3)
 534                         # SLAAC only but dnsmasq attempts to link HOSTNAME, DHCPv4 MAC, and SLAAC
 535                         xappend "--dhcp-range=$nettag::,constructor:$ifname,ra-only,ra-names"
 536                         ;;
 537                 *)
 538                         # SLAAC and full DHCP
 539                         xappend "--dhcp-range=$nettag$dhcp6range,constructor:$ifname,slaac,ra-names,$leasetime"
 540                         ;;
 541                 esac
 542         fi
 543
 544         dhcp_option_add "$cfg" "$networkid"
 545 }
 546
 547 dhcp_option_append() {
 548         local option="$1"
 549         local networkid="$2"
 550         local force="$3"
 551
 552         xappend "--dhcp-option${force:+-force}=${networkid:+$networkid,}$option"
 553 }
 554
 555 dhcp_option_add() {
 556         # NOTE: dnsmasq has explicit "option6:" prefix for DHCPv6 so no collisions
 557         local cfg="$1"
 558         local networkid="$2"
 559         local force="$3"
 560
 561         [ "$force" = "0" ] && force=
 562
 563         local list_len
 564         config_get list_len "$cfg" dhcp_option_LENGTH
 565
 566         if [ -n "$list_len" ]; then
 567                 config_list_foreach "$cfg" dhcp_option dhcp_option_append "$networkid" "$force"
 568         else
 569                 config_get dhcp_option "$cfg" dhcp_option
 570
 571                 [ -n "$dhcp_option" ] && echo "Warning: the 'option dhcp_option' syntax is deprecated, use 'list dhcp_option'" >&2
 572
 573                 local option
 574                 for option in $dhcp_option; do
 575                         dhcp_option_append "$option" "$networkid" "$force"
 576                 done
 577         fi
 578 }
 579
 580 dhcp_domain_add() {
 581         local cfg="$1"
 582         local ip name names record
 583
 584         config_get names "$cfg" name "$2"
 585         [ -n "$names" ] || return 0
 586
 587         config_get ip "$cfg" ip "$3"
 588         [ -n "$ip" ] || return 0
 589
 590         for name in $names; do
 591                 record="${record:+$record }$name"
 592         done
 593
 594         echo "$ip $record" >> $HOSTFILE
 595 }
 596
 597 dhcp_srv_add() {
 598         local cfg="$1"
 599
 600         config_get srv "$cfg" srv
 601         [ -n "$srv" ] || return 0
 602
 603         config_get target "$cfg" target
 604         [ -n "$target" ] || return 0
 605
 606         config_get port "$cfg" port
 607         [ -n "$port" ] || return 0
 608
 609         config_get class "$cfg" class
 610         config_get weight "$cfg" weight
 611
 612         local service="$srv,$target,$port${class:+,$class${weight:+,$weight}}"
 613
 614         xappend "--srv-host=$service"
 615 }
 616
 617 dhcp_mx_add() {
 618         local cfg="$1"
 619         local domain relay pref
 620
 621         config_get domain "$cfg" domain
 622         [ -n "$domain" ] || return 0
 623
 624         config_get relay "$cfg" relay
 625         [ -n "$relay" ] || return 0
 626
 627         config_get pref "$cfg" pref 0
 628
 629         local service="$domain,$relay,$pref"
 630
 631         xappend "--mx-host=$service"
 632 }
 633
 634 dhcp_cname_add() {
 635         local cfg="$1"
 636         local cname target
 637
 638         config_get cname "$cfg" cname
 639         [ -n "$cname" ] || return 0
 640
 641         config_get target "$cfg" target
 642         [ -n "$target" ] || return 0
 643
 644         xappend "--cname=${cname},${target}"
 645 }
 646
 647 dhcp_hostrecord_add() {
 648         local cfg="$1"
 649         local names addresses record val
 650
 651         config_get names "$cfg" name "$2"
 652         if [ -z "$names" ]; then
 653                 return 0
 654         fi
 655
 656         config_get addresses "$cfg" ip "$3"
 657         if [ -z "$addresses" ]; then
 658                 return 0
 659         fi
 660
 661         for val in $names $addresses; do
 662                 record="${record:+$record,}$val"
 663         done
 664
 665         xappend "--host-record=$record"
 666 }
 667
 668 dhcp_relay_add() {
 669         local cfg="$1"
 670         local local_addr server_addr interface
 671
 672         config_get local_addr "$cfg" local_addr
 673         [ -n "$local_addr" ] || return 0
 674
 675         config_get server_addr "$cfg" server_addr
 676         [ -n "$server_addr" ] || return 0
 677
 678         config_get interface "$cfg" interface
 679         if [ -z "$interface" ]; then
 680                 xappend "--dhcp-relay=$local_addr,$server_addr"
 681         else
 682                 network_get_device ifname "$interface" || return
 683                 xappend "--dhcp-relay=$local_addr,$server_addr,$ifname"
 684         fi
 685 }
 686
 687 dnsmasq_start()
 688 {
 689         local cfg="$1" disabled resolvfile
 690
 691         config_get_bool disabled "$cfg" disabled 0
 692         [ "$disabled" -gt 0 ] && return 0
 693
 694         # reset list of DOMAINS and DNS servers (for each dnsmasq instance)
 695         DNS_SERVERS=""
 696         DOMAIN=""
 697         CONFIGFILE="${BASECONFIGFILE}.${cfg}"
 698         CONFIGFILE_TMP="${CONFIGFILE}.$$"
 699         HOSTFILE="${BASEHOSTFILE}.${cfg}"
 700         TIMESTAMPFILE="${BASETIMESTAMPFILE}.${cfg}"
 701         BASEDHCPSTAMPFILE_CFG="${BASEDHCPSTAMPFILE}.${cfg}"
 702
 703         # before we can call xappend
 704         mkdir -p /var/run/dnsmasq/
 705         mkdir -p $(dirname $CONFIGFILE)
 706         mkdir -p $(dirname $HOSTFILE)
 707         mkdir -p /var/lib/misc
 708         chown dnsmasq:dnsmasq /var/run/dnsmasq
 709
 710         [ -f "$TIMESTAMPFILE" ] && rm -f "$TIMESTAMPFILE"
 711
 712         echo "# auto-generated config file from /etc/config/dhcp" > $CONFIGFILE_TMP
 713         echo "# auto-generated config file from /etc/config/dhcp" > $HOSTFILE
 714
 715         # if we did this last, we could override auto-generated config
 716         [ -f /etc/dnsmasq.conf ] && {
 717                 xappend "--conf-file=/etc/dnsmasq.conf"
 718         }
 719
 720         $PROG --version | grep -osqE "^Compile time options:.* DHCPv6( |$)" && DHCPv6CAPABLE=1 || DHCPv6CAPABLE=0
 721
 722
 723         if [ -x /usr/sbin/odhcpd -a -x /etc/init.d/odhcpd ] ; then
 724                 local odhcpd_is_main odhcpd_is_enabled
 725                 config_get odhcpd_is_main odhcpd maindhcp 0
 726                 /etc/init.d/odhcpd enabled && odhcpd_is_enabled=1 || odhcpd_is_enabled=0
 727
 728
 729                 if [ "$odhcpd_is_enabled" -eq 0 -a "$DHCPv6CAPABLE" -eq 1 ] ; then
 730                         # DHCP V4 and V6 in DNSMASQ
 731                         DNSMASQ_DHCP_VER=6
 732                 elif [ "$odhcpd_is_main" -gt 0 ] ; then
 733                         # ODHCPD is doing it all
 734                         DNSMASQ_DHCP_VER=0
 735                 else
 736                         # You have ODHCPD but use DNSMASQ for DHCPV4
 737                         DNSMASQ_DHCP_VER=4
 738                 fi
 739
 740         elif [ "$DHCPv6CAPABLE" -eq 1 ] ; then
 741                 # DHCP V4 and V6 in DNSMASQ
 742                 DNSMASQ_DHCP_VER=6
 743         else
 744                 DNSMASQ_DHCP_VER=4
 745         fi
 746
 747         # Allow DHCP/DHCPv6 to be handled by ISC DHCPD
 748         if [ -x /usr/sbin/dhcpd ] ; then
 749                 if [ -x /etc/init.d/dhcpd ] ; then
 750                         /etc/init.d/dhcpd enabled && DNSMASQ_DHCP_VER=0
 751                 fi
 752                 if [ -x /etc/init.d/dhcpd6 -a "$DNSMASQ_DHCP_VER" -gt 0 ] ; then
 753                         /etc/init.d/dhcpd6 enabled && DNSMASQ_DHCP_VER=4
 754                 fi
 755         fi
 756
 757         append_bool "$cfg" authoritative "--dhcp-authoritative"
 758         append_bool "$cfg" nodaemon "--no-daemon"
 759         append_bool "$cfg" domainneeded "--domain-needed"
 760         append_bool "$cfg" filterwin2k "--filterwin2k"
 761         append_bool "$cfg" nohosts "--no-hosts"
 762         append_bool "$cfg" nonegcache "--no-negcache"
 763         append_bool "$cfg" strictorder "--strict-order"
 764         append_bool "$cfg" logqueries "--log-queries=extra"
 765         append_bool "$cfg" noresolv "--no-resolv"
 766         append_bool "$cfg" localise_queries "--localise-queries"
 767         append_bool "$cfg" readethers "--read-ethers"
 768         append_bool "$cfg" dbus "--enable-dbus"
 769         append_bool "$cfg" expandhosts "--expand-hosts"
 770         config_get tftp_root "$cfg" "tftp_root"
 771         [ -n "$tftp_root" ] && mkdir -p "$tftp_root" && append_bool "$cfg" enable_tftp "--enable-tftp"
 772         append_bool "$cfg" tftp_no_fail "--tftp-no-fail"
 773         append_bool "$cfg" nonwildcard "--bind-dynamic"
 774         append_bool "$cfg" fqdn "--dhcp-fqdn"
 775         append_bool "$cfg" proxydnssec "--proxy-dnssec"
 776         append_bool "$cfg" localservice "--local-service"
 777         append_bool "$cfg" logdhcp "--log-dhcp"
 778         append_bool "$cfg" quietdhcp "--quiet-dhcp"
 779         append_bool "$cfg" sequential_ip "--dhcp-sequential-ip"
 780         append_bool "$cfg" allservers "--all-servers"
 781         append_bool "$cfg" noping "--no-ping"
 782
 783         append_parm "$cfg" logfacility "--log-facility"
 784         append_parm "$cfg" dhcpscript "--dhcp-script"
 785         append_parm "$cfg" cachesize "--cache-size"
 786         append_parm "$cfg" dnsforwardmax "--dns-forward-max"
 787         append_parm "$cfg" port "--port"
 788         append_parm "$cfg" ednspacket_max "--edns-packet-max"
 789         append_parm "$cfg" dhcpleasemax "--dhcp-lease-max"
 790         append_parm "$cfg" "queryport" "--query-port"
 791         append_parm "$cfg" "minport" "--min-port"
 792         append_parm "$cfg" "maxport" "--max-port"
 793         append_parm "$cfg" "domain" "--domain"
 794         append_parm "$cfg" "local" "--server"
 795         config_list_foreach "$cfg" "server" append_server
 796         config_list_foreach "$cfg" "address" append_address
 797         config_list_foreach "$cfg" "ipset" append_ipset
 798         config_list_foreach "$cfg" "interface" append_interface
 799         config_list_foreach "$cfg" "notinterface" append_notinterface
 800         config_list_foreach "$cfg" "addnhosts" append_addnhosts
 801         config_list_foreach "$cfg" "bogusnxdomain" append_bogusnxdomain
 802         append_parm "$cfg" "leasefile" "--dhcp-leasefile" "/tmp/dhcp.leases"
 803         append_parm "$cfg" "serversfile" "--servers-file"
 804         append_parm "$cfg" "tftp_root" "--tftp-root"
 805         append_parm "$cfg" "dhcp_boot" "--dhcp-boot"
 806         append_parm "$cfg" "local_ttl" "--local-ttl"
 807         append_parm "$cfg" "pxe_prompt" "--pxe-prompt"
 808         config_list_foreach "$cfg" "pxe_service" append_pxe_service
 809         config_get DOMAIN "$cfg" domain
 810
 811         config_get_bool ADD_LOCAL_DOMAIN "$cfg" add_local_domain 1
 812         config_get_bool ADD_LOCAL_HOSTNAME "$cfg" add_local_hostname 1
 813         config_get ADD_LOCAL_FQDN "$cfg" add_local_fqdn ""
 814         config_get ADD_WAN_FQDN "$cfg" add_wan_fqdn 0
 815
 816         if [ -z "$ADD_LOCAL_FQDN" ] ; then
 817                 # maintain support for previous UCI
 818                 ADD_LOCAL_FQDN="$ADD_LOCAL_HOSTNAME"
 819         fi
 820
 821         config_get_bool readethers "$cfg" readethers
 822         [ "$readethers" = "1" -a \! -e "/etc/ethers" ] && touch /etc/ethers
 823
 824         config_get dhcpscript $cfg dhcpscript
 825
 826         config_get leasefile $cfg leasefile "/tmp/dhcp.leases"
 827         [ -n "$leasefile" -a \! -e "$leasefile" ] && touch "$leasefile"
 828         config_get_bool cachelocal "$cfg" cachelocal 1
 829
 830         config_get_bool noresolv "$cfg" noresolv 0
 831         if [ "$noresolv" != "1" ]; then
 832                 config_get resolvfile "$cfg" resolvfile "/tmp/resolv.conf.auto"
 833                 # So jail doesn't complain if file missing
 834                 [ -n "$resolvfile" -a \! -e "$resolvfile" ] && touch "$resolvfile"
 835         fi
 836
 837         [ -n "$resolvfile" ] && xappend "--resolv-file=$resolvfile"
 838
 839         config_get hostsfile "$cfg" dhcphostsfile
 840         [ -e "$hostsfile" ] && xappend "--dhcp-hostsfile=$hostsfile"
 841
 842         local rebind
 843         config_get_bool rebind "$cfg" rebind_protection 1
 844         [ $rebind -gt 0 ] && {
 845                 log_once \
 846                         "DNS rebinding protection is active," \
 847                         "will discard upstream RFC1918 responses!"
 848                 xappend "--stop-dns-rebind"
 849
 850                 local rebind_localhost
 851                 config_get_bool rebind_localhost "$cfg" rebind_localhost 0
 852                 [ $rebind_localhost -gt 0 ] && {
 853                         log_once "Allowing 127.0.0.0/8 responses"
 854                         xappend "--rebind-localhost-ok"
 855                 }
 856
 857                 append_rebind_domain() {
 858                         log_once "Allowing RFC1918 responses for domain $1"
 859                         xappend "--rebind-domain-ok=$1"
 860                 }
 861
 862                 config_list_foreach "$cfg" rebind_domain append_rebind_domain
 863         }
 864
 865         config_get_bool dnssec "$cfg" dnssec 0
 866         [ "$dnssec" -gt 0 ] && {
 867                 xappend "--conf-file=$TRUSTANCHORSFILE"
 868                 xappend "--dnssec"
 869                 [ -x /etc/init.d/sysntpd ] && {
 870                         /etc/init.d/sysntpd enabled
 871                         [ "$?" -ne 0 -o "$(uci_get system.ntp.enabled)" = "1" ] && {
 872                                 [ -f "$TIMEVALIDFILE" ] || xappend "--dnssec-no-timecheck"
 873                         }
 874                 }
 875                 append_bool "$cfg" dnsseccheckunsigned "--dnssec-check-unsigned"
 876         }
 877
 878         config_get addmac "$cfg" addmac 0
 879         [ "$addmac" != "0" ] && {
 880                 [ "$addmac" = "1" ] && addmac=
 881                 xappend "--add-mac${addmac:+="$addmac"}"
 882         }
 883
 884         dhcp_option_add "$cfg" "" 0
 885
 886         xappend "--dhcp-broadcast=tag:needs-broadcast"
 887
 888         xappend "--addn-hosts=$(dirname $HOSTFILE)"
 889
 890         config_get dnsmasqconfdir "$cfg" confdir "/tmp/dnsmasq.d"
 891         [ ! -d "$dnsmasqconfdir" ] && mkdir -p $dnsmasqconfdir
 892         xappend "--conf-dir=$dnsmasqconfdir"
 893         xappend "--user=dnsmasq"
 894         xappend "--group=dnsmasq"
 895         echo >> $CONFIGFILE_TMP
 896
 897         config_get_bool enable_tftp "$cfg" enable_tftp 0
 898         [ "$enable_tftp" -gt 0 ] && {
 899                 config_get tftp_root "$cfg" tftp_root
 900                 append EXTRA_MOUNT $tftp_root
 901         }
 902
 903         config_foreach filter_dnsmasq host dhcp_host_add "$cfg"
 904         echo >> $CONFIGFILE_TMP
 905         config_foreach filter_dnsmasq boot dhcp_boot_add "$cfg"
 906         config_foreach filter_dnsmasq mac dhcp_mac_add "$cfg"
 907         config_foreach filter_dnsmasq tag dhcp_tag_add "$cfg"
 908         config_foreach filter_dnsmasq vendorclass dhcp_vendorclass_add "$cfg"
 909         config_foreach filter_dnsmasq userclass dhcp_userclass_add "$cfg"
 910         config_foreach filter_dnsmasq circuitid dhcp_circuitid_add "$cfg"
 911         config_foreach filter_dnsmasq remoteid dhcp_remoteid_add "$cfg"
 912         config_foreach filter_dnsmasq subscrid dhcp_subscrid_add "$cfg"
 913         config_foreach filter_dnsmasq match dhcp_match_add "$cfg"
 914         config_foreach filter_dnsmasq domain dhcp_domain_add "$cfg"
 915         config_foreach filter_dnsmasq hostrecord dhcp_hostrecord_add "$cfg"
 916         config_foreach filter_dnsmasq relay dhcp_relay_add "$cfg"
 917
 918         echo >> $CONFIGFILE_TMP
 919         config_foreach filter_dnsmasq srvhost dhcp_srv_add "$cfg"
 920         config_foreach filter_dnsmasq mxhost dhcp_mx_add "$cfg"
 921         echo >> $CONFIGFILE_TMP
 922
 923         config_get_bool boguspriv "$cfg" boguspriv 1
 924         [ "$boguspriv" -gt 0 ] && {
 925                 xappend "--bogus-priv"
 926                 [ -r "$RFC6761FILE" ] && xappend "--conf-file=$RFC6761FILE"
 927         }
 928
 929         if [ "$DNSMASQ_DHCP_VER" -gt 4 ] ; then
 930                 # Enable RA feature for when/if it is constructed,
 931                 # and RA is selected per interface pool (RA, DHCP, or both),
 932                 # but no one (should) want RA broadcast in syslog
 933                 config_foreach filter_dnsmasq dhcp dhcp_add "$cfg"
 934                 xappend "--enable-ra"
 935                 xappend "--quiet-ra"
 936                 append_bool "$cfg" quietdhcp "--quiet-dhcp6"
 937
 938         elif [ "$DNSMASQ_DHCP_VER" -gt 0 ] ; then
 939                 config_foreach filter_dnsmasq dhcp dhcp_add "$cfg"
 940         fi
 941
 942
 943         echo >> $CONFIGFILE_TMP
 944         config_foreach filter_dnsmasq cname dhcp_cname_add "$cfg"
 945         echo >> $CONFIGFILE_TMP
 946
 947         echo >> $CONFIGFILE_TMP
 948         mv -f $CONFIGFILE_TMP $CONFIGFILE
 949
 950         [ "$resolvfile" = "/tmp/resolv.conf.auto" ] && {
 951                 rm -f /tmp/resolv.conf
 952                 [ $ADD_LOCAL_DOMAIN -eq 1 ] && [ -n "$DOMAIN" ] && {
 953                         echo "search $DOMAIN" >> /tmp/resolv.conf
 954                 }
 955                 DNS_SERVERS="$DNS_SERVERS 127.0.0.1"
 956                 for DNS_SERVER in $DNS_SERVERS ; do
 957                         echo "nameserver $DNS_SERVER" >> /tmp/resolv.conf
 958                 done
 959         }
 960
 961         procd_open_instance $cfg
 962         procd_set_param command $PROG -C $CONFIGFILE -k -x /var/run/dnsmasq/dnsmasq."${cfg}".pid
 963         procd_set_param file $CONFIGFILE
 964         procd_set_param respawn
 965
 966         local dnsmasqconffile="/etc/dnsmasq.${cfg}.conf"
 967         if [ ! -r "$dnsmasqconffile" ]; then
 968                 dnsmasqconffile=/etc/dnsmasq.conf
 969         fi
 970
 971         procd_add_jail dnsmasq ubus log
 972         procd_add_jail_mount $CONFIGFILE $TRUSTANCHORSFILE $HOSTFILE $RFC6761FILE /etc/passwd /etc/group /etc/TZ /dev/null /dev/urandom $dnsmasqconffile $dnsmasqconfdir $resolvfile $dhcpscript /etc/hosts /etc/ethers $EXTRA_MOUNT
 973         procd_add_jail_mount_rw /var/run/dnsmasq/ $leasefile
 974
 975         procd_close_instance
 976 }
 977
 978 dnsmasq_stop()
 979 {
 980         local cfg="$1"
 981
 982         config_get resolvfile "$cfg" "resolvfile"
 983
 984         #relink /tmp/resolve.conf only for main instance
 985         [ "$resolvfile" = "/tmp/resolv.conf.auto" ] && {
 986                 [ -f /tmp/resolv.conf ] && {
 987                         rm -f /tmp/resolv.conf
 988                         ln -s "$resolvfile" /tmp/resolv.conf
 989                 }
 990         }
 991
 992         rm -f ${BASEDHCPSTAMPFILE}.${cfg}.*.dhcp
 993 }
 994
 995 service_triggers()
 996 {
 997         procd_add_reload_trigger "dhcp"
 998         procd_add_raw_trigger "interface.*" 2000 /etc/init.d/dnsmasq reload
 999 }
1000
1001 boot()
1002 {
1003         BOOT=1
1004         start "$@"
1005 }
1006
1007 start_service() {
1008         local instance="$1"
1009         local instance_found=0
1010
1011         [ -n "$BOOT" ] && return
1012
1013         . /lib/functions/network.sh
1014
1015         config_cb() {
1016                 local type="$1"
1017                 local name="$2"
1018                 if [ "$type" = "dnsmasq" ]; then
1019                         if [ -n "$instance" -a "$instance" = "$name" ]; then
1020                                 instance_found=1
1021                         fi
1022                 fi
1023         }
1024
1025         config_load dhcp
1026
1027         if [ -n "$instance" ]; then
1028                 [ "$instance_found" -gt 0 ] || return
1029                 dnsmasq_start "$instance"
1030         else
1031                 config_foreach dnsmasq_start dnsmasq
1032         fi
1033 }
1034
1035 reload_service() {
1036         rc_procd start_service "$@"
1037         return 0
1038 }
1039
1040 stop_service() {
1041         local instance="$1"
1042         local instance_found=0
1043
1044         config_cb() {
1045                 local type="$1"
1046                 local name="$2"
1047                 if [ "$type" = "dnsmasq" ]; then
1048                         if [ -n "$instance" -a "$instance" = "$name" ]; then
1049                                 instance_found=1
1050                         fi
1051                 fi
1052         }
1053
1054         config_load dhcp
1055
1056         if [ -n "$instance" ]; then
1057                 [ "$instance_found" -gt 0 ] || return
1058                 dnsmasq_stop "$instance"
1059         else
1060                 config_foreach dnsmasq_stop dnsmasq
1061         fi
1062 }