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

   1 #!/bin/sh /etc/rc.common
   2 # Copyright (C) 2007-2012 OpenWrt.org
   3
   4 START=60
   5
   6 USE_PROCD=1
   7 PROG=/usr/sbin/dnsmasq
   8
   9 DNS_SERVERS=""
  10 DOMAIN=""
  11
  12 ADD_LOCAL_DOMAIN=1
  13 ADD_LOCAL_HOSTNAME=1
  14
  15 CONFIGFILE="/var/etc/dnsmasq.conf"
  16 HOSTFILE="/tmp/hosts/dhcp"
  17 TRUSTANCHORSFILE="/usr/share/dnsmasq/trust-anchors.conf"
  18 TIMESTAMPFILE="/etc/dnsmasq.time"
  19
  20 xappend() {
  21         local value="$1"
  22
  23         echo "${value#--}" >> $CONFIGFILE
  24 }
  25
  26 dhcp_calc() {
  27         local ip="$1"
  28         local res=0
  29
  30         while [ -n "$ip" ]; do
  31                 part="${ip%%.*}"
  32                 res="$(($res * 256))"
  33                 res="$(($res + $part))"
  34                 [ "${ip%.*}" != "$ip" ] && ip="${ip#*.}" || ip=
  35         done
  36         echo "$res"
  37 }
  38
  39 dhcp_check() {
  40         local ifname="$1"
  41         local stamp="/var/run/dnsmasq.$ifname.dhcp"
  42         local rv=0
  43
  44         [ -s "$stamp" ] && return $(cat "$stamp")
  45
  46         udhcpc -n -q -s /bin/true -t 1 -i "$ifname" >&- && rv=1 || rv=0
  47
  48         [ $rv -eq 1 ] && \
  49                 logger -t dnsmasq \
  50                         "found already running DHCP-server on interface '$ifname'" \
  51                         "refusing to start, use 'option force 1' to override"
  52
  53         echo $rv > "$stamp"
  54         return $rv
  55 }
  56
  57 log_once() {
  58         pidof dnsmasq >/dev/null || \
  59                 logger -t dnsmasq "$@"
  60 }
  61
  62 append_bool() {
  63         local section="$1"
  64         local option="$2"
  65         local value="$3"
  66         local _loctmp
  67         config_get_bool _loctmp "$section" "$option" 0
  68         [ $_loctmp -gt 0 ] && xappend "$value"
  69 }
  70
  71 append_parm() {
  72         local section="$1"
  73         local option="$2"
  74         local switch="$3"
  75         local _loctmp
  76         config_get _loctmp "$section" "$option"
  77         [ -z "$_loctmp" ] && return 0
  78         xappend "$switch=$_loctmp"
  79 }
  80
  81 append_server() {
  82         xappend "--server=$1"
  83 }
  84
  85 append_address() {
  86         xappend "--address=$1"
  87 }
  88
  89 append_ipset() {
  90         xappend "--ipset=$1"
  91 }
  92
  93 append_interface() {
  94         local ifname=$(uci_get_state network "$1" ifname "$1")
  95         xappend "--interface=$ifname"
  96 }
  97
  98 append_notinterface() {
  99         local ifname=$(uci_get_state network "$1" ifname "$1")
 100         xappend "--except-interface=$ifname"
 101 }
 102
 103 append_addnhosts() {
 104         xappend "--addn-hosts=$1"
 105 }
 106
 107 append_bogusnxdomain() {
 108         xappend "--bogus-nxdomain=$1"
 109 }
 110
 111 append_pxe_service() {
 112         xappend "--pxe-service=$1"
 113 }
 114
 115 dnsmasq() {
 116         local cfg="$1"
 117         append_bool "$cfg" authoritative "--dhcp-authoritative"
 118         append_bool "$cfg" nodaemon "--no-daemon"
 119         append_bool "$cfg" domainneeded "--domain-needed"
 120         append_bool "$cfg" filterwin2k "--filterwin2k"
 121         append_bool "$cfg" nohosts "--no-hosts"
 122         append_bool "$cfg" nonegcache "--no-negcache"
 123         append_bool "$cfg" strictorder "--strict-order"
 124         append_bool "$cfg" logqueries "--log-queries=extra"
 125         append_bool "$cfg" noresolv "--no-resolv"
 126         append_bool "$cfg" localise_queries "--localise-queries"
 127         append_bool "$cfg" readethers "--read-ethers"
 128         append_bool "$cfg" dbus "--enable-dbus"
 129         append_bool "$cfg" boguspriv "--bogus-priv"
 130         append_bool "$cfg" expandhosts "--expand-hosts"
 131         append_bool "$cfg" enable_tftp "--enable-tftp"
 132         append_bool "$cfg" tftp_no_fail "--tftp-no-fail"
 133         append_bool "$cfg" nonwildcard "--bind-dynamic"
 134         append_bool "$cfg" fqdn "--dhcp-fqdn"
 135         append_bool "$cfg" proxydnssec "--proxy-dnssec"
 136         append_bool "$cfg" localservice "--local-service"
 137         append_bool "$cfg" quietdhcp "--quiet-dhcp"
 138         append_bool "$cfg" sequential_ip "--dhcp-sequential-ip"
 139         append_bool "$cfg" allservers "--all-servers"
 140         append_bool "$cfg" noping "--no-ping"
 141
 142         append_parm "$cfg" dhcpscript "--dhcp-script"
 143         append_parm "$cfg" cachesize "--cache-size"
 144         append_parm "$cfg" dnsforwardmax "--dns-forward-max"
 145         append_parm "$cfg" port "--port"
 146         append_parm "$cfg" ednspacket_max "--edns-packet-max"
 147         append_parm "$cfg" dhcpleasemax "--dhcp-lease-max"
 148         append_parm "$cfg" "queryport" "--query-port"
 149         append_parm "$cfg" "domain" "--domain"
 150         append_parm "$cfg" "local" "--server"
 151         config_list_foreach "$cfg" "server" append_server
 152         config_list_foreach "$cfg" "address" append_address
 153         config_list_foreach "$cfg" "ipset" append_ipset
 154         config_list_foreach "$cfg" "interface" append_interface
 155         config_list_foreach "$cfg" "notinterface" append_notinterface
 156         config_list_foreach "$cfg" "addnhosts" append_addnhosts
 157         config_list_foreach "$cfg" "bogusnxdomain" append_bogusnxdomain
 158         append_parm "$cfg" "leasefile" "--dhcp-leasefile"
 159         append_parm "$cfg" "resolvfile" "--resolv-file"
 160         append_parm "$cfg" "serversfile" "--servers-file"
 161         append_parm "$cfg" "tftp_root" "--tftp-root"
 162         append_parm "$cfg" "dhcp_boot" "--dhcp-boot"
 163         append_parm "$cfg" "local_ttl" "--local-ttl"
 164         append_parm "$cfg" "pxe_prompt" "--pxe-prompt"
 165         config_list_foreach "$cfg" "pxe_service" append_pxe_service
 166         config_get DOMAIN "$cfg" domain
 167
 168         config_get_bool ADD_LOCAL_DOMAIN "$cfg" add_local_domain 1
 169         config_get_bool ADD_LOCAL_HOSTNAME "$cfg" add_local_hostname 1
 170
 171         config_get_bool readethers "$cfg" readethers
 172         [ "$readethers" = "1" -a \! -e "/etc/ethers" ] && touch /etc/ethers
 173
 174         config_get leasefile $cfg leasefile
 175         [ -n "$leasefile" -a \! -e "$leasefile" ] && touch "$leasefile"
 176         config_get_bool cachelocal "$cfg" cachelocal 1
 177
 178         config_get hostsfile "$cfg" dhcphostsfile
 179         [ -e "$hostsfile" ] && xappend "--dhcp-hostsfile=$hostsfile"
 180
 181         local rebind
 182         config_get_bool rebind "$cfg" rebind_protection 1
 183         [ $rebind -gt 0 ] && {
 184                 log_once \
 185                         "DNS rebinding protection is active," \
 186                         "will discard upstream RFC1918 responses!"
 187                 xappend "--stop-dns-rebind"
 188
 189                 local rebind_localhost
 190                 config_get_bool rebind_localhost "$cfg" rebind_localhost 0
 191                 [ $rebind_localhost -gt 0 ] && {
 192                         log_once "Allowing 127.0.0.0/8 responses"
 193                         xappend "--rebind-localhost-ok"
 194                 }
 195
 196                 append_rebind_domain() {
 197                         log_once "Allowing RFC1918 responses for domain $1"
 198                         xappend "--rebind-domain-ok=$1"
 199                 }
 200
 201                 config_list_foreach "$cfg" rebind_domain append_rebind_domain
 202         }
 203
 204         config_get_bool dnssec "$cfg" dnssec 0
 205         [ "$dnssec" -gt 0 ] && {
 206                 xappend "--conf-file=$TRUSTANCHORSFILE"
 207                 xappend "--dnssec"
 208                 xappend "--dnssec-timestamp=$TIMESTAMPFILE"
 209                 append_bool "$cfg" dnsseccheckunsigned "--dnssec-check-unsigned"
 210         }
 211
 212         dhcp_option_add "$cfg" "" 0
 213
 214         xappend "--dhcp-broadcast=tag:needs-broadcast"
 215
 216         mkdir -p /tmp/hosts /tmp/dnsmasq.d
 217         xappend "--addn-hosts=/tmp/hosts"
 218         xappend "--conf-dir=/tmp/dnsmasq.d"
 219
 220         echo >> $CONFIGFILE
 221 }
 222
 223 dhcp_subscrid_add() {
 224         local cfg="$1"
 225
 226         config_get networkid "$cfg" networkid
 227         [ -n "$networkid" ] || return 0
 228
 229         config_get subscriberid "$cfg" subscriberid
 230         [ -n "$subscriberid" ] || return 0
 231
 232         xappend "--dhcp-subscrid=$networkid,$subscriberid"
 233
 234         config_get_bool force "$cfg" force 0
 235
 236         dhcp_option_add "$cfg" "$networkid" "$force"
 237 }
 238
 239 dhcp_remoteid_add() {
 240         local cfg="$1"
 241
 242         config_get networkid "$cfg" networkid
 243         [ -n "$networkid" ] || return 0
 244
 245         config_get remoteid "$cfg" remoteid
 246         [ -n "$remoteid" ] || return 0
 247
 248         xappend "--dhcp-remoteid=$networkid,$remoteid"
 249
 250         config_get_bool force "$cfg" force 0
 251
 252         dhcp_option_add "$cfg" "$networkid" "$force"
 253 }
 254
 255 dhcp_circuitid_add() {
 256         local cfg="$1"
 257
 258         config_get networkid "$cfg" networkid
 259         [ -n "$networkid" ] || return 0
 260
 261         config_get circuitid "$cfg" circuitid
 262         [ -n "$circuitid" ] || return 0
 263
 264         xappend "--dhcp-circuitid=$networkid,$circuitid"
 265
 266         config_get_bool force "$cfg" force 0
 267
 268         dhcp_option_add "$cfg" "$networkid" "$force"
 269 }
 270
 271 dhcp_userclass_add() {
 272         local cfg="$1"
 273
 274         config_get networkid "$cfg" networkid
 275         [ -n "$networkid" ] || return 0
 276
 277         config_get userclass "$cfg" userclass
 278         [ -n "$userclass" ] || return 0
 279
 280         xappend "--dhcp-userclass=$networkid,$userclass"
 281
 282         config_get_bool force "$cfg" force 0
 283
 284         dhcp_option_add "$cfg" "$networkid" "$force"
 285 }
 286
 287 dhcp_vendorclass_add() {
 288         local cfg="$1"
 289
 290         config_get networkid "$cfg" networkid
 291         [ -n "$networkid" ] || return 0
 292
 293         config_get vendorclass "$cfg" vendorclass
 294         [ -n "$vendorclass" ] || return 0
 295
 296         xappend "--dhcp-vendorclass=$networkid,$vendorclass"
 297
 298         config_get_bool force "$cfg" force 0
 299
 300         dhcp_option_add "$cfg" "$networkid" "$force"
 301 }
 302
 303 dhcp_host_add() {
 304         local cfg="$1"
 305
 306         config_get_bool force "$cfg" force 0
 307
 308         config_get networkid "$cfg" networkid
 309         [ -n "$networkid" ] && dhcp_option_add "$cfg" "$networkid" "$force"
 310
 311         config_get name "$cfg" name
 312         config_get ip "$cfg" ip
 313         [ -n "$ip" -o -n "$name" ] || return 0
 314
 315         config_get_bool dns "$cfg" dns 0
 316         [ "$dns" = "1" -a -n "$ip" -a -n "$name" ] && {
 317                 echo "$ip $name${DOMAIN:+.$DOMAIN}" >> $HOSTFILE
 318         }
 319
 320         config_get mac "$cfg" mac
 321         if [ -n "$mac" ]; then
 322                 # --dhcp-host=00:20:e0:3b:13:af,192.168.0.199,lap
 323                 macs=""
 324                 for m in $mac; do append macs "$m" ","; done
 325         else
 326                 # --dhcp-host=lap,192.168.0.199
 327                 [ -n "$name" ] || return 0
 328                 macs="$name"
 329                 name=""
 330         fi
 331
 332         config_get tag "$cfg" tag
 333
 334         config_get_bool broadcast "$cfg" broadcast 0
 335         [ "$broadcast" = "0" ] && broadcast=
 336
 337         xappend "--dhcp-host=$macs${networkid:+,net:$networkid}${broadcast:+,set:needs-broadcast}${tag:+,set:$tag}${ip:+,$ip}${name:+,$name}"
 338 }
 339
 340 dhcp_tag_add() {
 341         local cfg="$1"
 342
 343         tag="$cfg"
 344
 345         [ -n "$tag" ] || return 0
 346
 347         config_get_bool force "$cfg" force 0
 348         [ "$force" = "0" ] && force=
 349
 350         config_get option "$cfg" dhcp_option
 351         for o in $option; do
 352                 xappend "--dhcp-option${force:+-force}=tag:$tag,$o"
 353         done
 354 }
 355
 356 dhcp_mac_add() {
 357         local cfg="$1"
 358
 359         config_get networkid "$cfg" networkid
 360         [ -n "$networkid" ] || return 0
 361
 362         config_get mac "$cfg" mac
 363         [ -n "$mac" ] || return 0
 364
 365         xappend "--dhcp-mac=$networkid,$mac"
 366
 367         dhcp_option_add "$cfg" "$networkid"
 368 }
 369
 370 dhcp_boot_add() {
 371         local cfg="$1"
 372
 373         config_get networkid "$cfg" networkid
 374
 375         config_get filename "$cfg" filename
 376         [ -n "$filename" ] || return 0
 377
 378         config_get servername "$cfg" servername
 379         config_get serveraddress "$cfg" serveraddress
 380
 381         [ -n "$serveraddress" -a ! -n "$servername" ] && return 0
 382
 383         xappend "--dhcp-boot=${networkid:+net:$networkid,}${filename}${servername:+,$servername}${serveraddress:+,$serveraddress}"
 384
 385         config_get_bool force "$cfg" force 0
 386
 387         dhcp_option_add "$cfg" "$networkid" "$force"
 388 }
 389
 390
 391 dhcp_add() {
 392         local cfg="$1"
 393         config_get net "$cfg" interface
 394         [ -n "$net" ] || return 0
 395
 396         config_get dhcpv4 "$cfg" dhcpv4
 397         [ "$dhcpv4" != "disabled" ] || return 0
 398
 399         config_get networkid "$cfg" networkid
 400         [ -n "$networkid" ] || networkid="$net"
 401
 402         network_get_subnet subnet "$net" || return 0
 403         network_get_device ifname "$net" || return 0
 404         network_get_protocol proto "$net" || return 0
 405
 406         [ "$cachelocal" = "0" ] && network_get_dnsserver dnsserver "$net" && {
 407                 DNS_SERVERS="$DNS_SERVERS $dnsserver"
 408         }
 409
 410         append_bool "$cfg" ignore "--no-dhcp-interface=$ifname" && return 0
 411
 412         # Do not support non-static interfaces for now
 413         [ static = "$proto" ] || return 0
 414
 415         # Override interface netmask with dhcp config if applicable
 416         config_get netmask "$cfg" netmask "${subnet##*/}"
 417
 418         #check for an already active dhcp server on the interface, unless 'force' is set
 419         config_get_bool force "$cfg" force 0
 420         [ $force -gt 0 ] || dhcp_check "$ifname" || return 0
 421
 422         config_get start "$cfg" start
 423         config_get limit "$cfg" limit
 424         config_get leasetime "$cfg" leasetime
 425         config_get options "$cfg" options
 426         config_get_bool dynamicdhcp "$cfg" dynamicdhcp 1
 427
 428         leasetime="${leasetime:-12h}"
 429         start="$(dhcp_calc "${start:-100}")"
 430         limit="${limit:-150}"
 431         [ "$limit" -gt 0 ] && limit=$((limit-1))
 432         eval "$(ipcalc.sh "${subnet%%/*}" $netmask $start $limit)"
 433         if [ "$dynamicdhcp" = "0" ]; then END="static"; fi
 434         xappend "--dhcp-range=$networkid,$START,$END,$NETMASK,$leasetime${options:+ $options}"
 435
 436         dhcp_option_add "$cfg" "$networkid"
 437 }
 438
 439 dhcp_option_add() {
 440         local cfg="$1"
 441         local networkid="$2"
 442         local force="$3"
 443
 444         [ "$force" = "0" ] && force=
 445
 446         config_get dhcp_option "$cfg" dhcp_option
 447         for o in $dhcp_option; do
 448                 xappend "--dhcp-option${force:+-force}=${networkid:+$networkid,}$o"
 449         done
 450
 451 }
 452
 453 dhcp_domain_add() {
 454         local cfg="$1"
 455         local ip name names record
 456
 457         config_get names "$cfg" name "$2"
 458         [ -n "$names" ] || return 0
 459
 460         config_get ip "$cfg" ip "$3"
 461         [ -n "$ip" ] || return 0
 462
 463         for name in $names; do
 464                 record="${record:+$record }$name"
 465         done
 466
 467         echo "$ip $record" >> $HOSTFILE
 468 }
 469
 470 dhcp_srv_add() {
 471         local cfg="$1"
 472
 473         config_get srv "$cfg" srv
 474         [ -n "$srv" ] || return 0
 475
 476         config_get target "$cfg" target
 477         [ -n "$target" ] || return 0
 478
 479         config_get port "$cfg" port
 480         [ -n "$port" ] || return 0
 481
 482         config_get class "$cfg" class
 483         config_get weight "$cfg" weight
 484
 485         local service="$srv,$target,$port${class:+,$class${weight:+,$weight}}"
 486
 487         xappend "--srv-host=$service"
 488 }
 489
 490 dhcp_mx_add() {
 491         local cfg="$1"
 492         local domain relay pref
 493
 494         config_get domain "$cfg" domain
 495         [ -n "$domain" ] || return 0
 496
 497         config_get relay "$cfg" relay
 498         [ -n "$relay" ] || return 0
 499
 500         config_get pref "$cfg" pref 0
 501
 502         local service="$domain,$relay,$pref"
 503
 504         xappend "--mx-host=$service"
 505 }
 506
 507 dhcp_cname_add() {
 508         local cfg="$1"
 509         local cname target
 510
 511         config_get cname "$cfg" cname
 512         [ -n "$cname" ] || return 0
 513
 514         config_get target "$cfg" target
 515         [ -n "$target" ] || return 0
 516
 517         xappend "--cname=${cname},${target}"
 518 }
 519
 520 dhcp_hostrecord_add() {
 521         local cfg="$1"
 522         local names addresses record val
 523
 524         config_get names "$cfg" name "$2"
 525         if [ -z "$names" ]; then
 526                 return 0
 527         fi
 528
 529         config_get addresses "$cfg" ip "$3"
 530         if [ -z "$addresses" ]; then
 531                 return 0
 532         fi
 533
 534         for val in $names $addresses; do
 535                 record="${record:+$record,}$val"
 536         done
 537
 538         xappend "--host-record=$record"
 539 }
 540
 541 service_triggers()
 542 {
 543         procd_add_reload_trigger "dhcp"
 544 }
 545
 546 boot() {
 547         # Will be launched through hotplug
 548         return 0
 549 }
 550
 551 start_service() {
 552         include /lib/functions
 553
 554         config_load dhcp
 555
 556         procd_open_instance
 557         procd_set_param command $PROG -C $CONFIGFILE -k -x /var/run/dnsmasq/dnsmasq.pid
 558         procd_set_param file $CONFIGFILE
 559         procd_set_param respawn
 560
 561         procd_add_jail dnsmasq ubus log
 562         procd_add_jail_mount $CONFIGFILE $TRUSTANCHORSFILE $HOSTFILE /etc/passwd /etc/group /etc/TZ /dev/null /dev/urandom /etc/dnsmasq.conf /tmp/dnsmasq.d /tmp/resolv.conf.auto /etc/hosts /etc/ethers
 563         procd_add_jail_mount_rw /var/run/dnsmasq/ /tmp/dhcp.leases $TIMESTAMPFILE
 564
 565         procd_close_instance
 566
 567         # before we can call xappend
 568         mkdir -p /var/run/dnsmasq/
 569         mkdir -p $(dirname $CONFIGFILE)
 570         mkdir -p /var/lib/misc
 571         touch /tmp/dhcp.leases
 572
 573         if [ ! -f "$TIMESTAMPFILE" ]; then
 574                 touch "$TIMESTAMPFILE"
 575                 chown nobody.nogroup "$TIMESTAMPFILE"
 576         fi
 577
 578         echo "# auto-generated config file from /etc/config/dhcp" > $CONFIGFILE
 579         echo "# auto-generated config file from /etc/config/dhcp" > $HOSTFILE
 580
 581         # if we did this last, we could override auto-generated config
 582         [ -f /etc/dnsmasq.conf ] && {
 583                 xappend "--conf-file=/etc/dnsmasq.conf"
 584         }
 585
 586         args=""
 587         config_foreach dnsmasq dnsmasq
 588         config_foreach dhcp_host_add host
 589         echo >> $CONFIGFILE
 590         config_foreach dhcp_boot_add boot
 591         config_foreach dhcp_mac_add mac
 592         config_foreach dhcp_tag_add tag
 593         config_foreach dhcp_vendorclass_add vendorclass
 594         config_foreach dhcp_userclass_add userclass
 595         config_foreach dhcp_circuitid_add circuitid
 596         config_foreach dhcp_remoteid_add remoteid
 597         config_foreach dhcp_subscrid_add subscrid
 598         config_foreach dhcp_domain_add domain
 599         config_foreach dhcp_hostrecord_add hostrecord
 600
 601         # add own hostname
 602         [ $ADD_LOCAL_HOSTNAME -eq 1 ] && {
 603                 local lanaddr lanaddr6
 604                 local ulaprefix="$(uci_get network @globals[0] ula_prefix)"
 605                 local hostname="$(uci_get system @system[0] hostname OpenWrt)"
 606
 607                 network_get_ipaddr lanaddr "lan" && {
 608                         dhcp_domain_add "" "$hostname" "$lanaddr"
 609                 }
 610
 611                 network_get_ipaddrs6 lanaddr6 "lan" && {
 612                         for lanaddr6 in $lanaddr6; do
 613                                 case "$lanaddr6" in
 614                                         "${ulaprefix%%:/*}"*)
 615                                                 dhcp_domain_add "" "$hostname" "${ulaprefix%%/*}1"
 616                                         ;;
 617                                 esac
 618                         done
 619                 }
 620         }
 621
 622         echo >> $CONFIGFILE
 623         config_foreach dhcp_srv_add srvhost
 624         config_foreach dhcp_mx_add mxhost
 625         echo >> $CONFIGFILE
 626
 627         config_get odhcpd_is_active odhcpd maindhcp
 628         if [ "$odhcpd_is_active" != "1" ]; then
 629                 config_foreach dhcp_add dhcp
 630         fi
 631
 632         echo >> $CONFIGFILE
 633         config_foreach dhcp_cname_add cname
 634         echo >> $CONFIGFILE
 635
 636         rm -f /tmp/resolv.conf
 637         [ $ADD_LOCAL_DOMAIN -eq 1 ] && [ -n "$DOMAIN" ] && {
 638                 echo "search $DOMAIN" >> /tmp/resolv.conf
 639         }
 640         DNS_SERVERS="$DNS_SERVERS 127.0.0.1"
 641         for DNS_SERVER in $DNS_SERVERS ; do
 642                 echo "nameserver $DNS_SERVER" >> /tmp/resolv.conf
 643         done
 644 }
 645
 646 reload_service() {
 647         rc_procd start_service "$@"
 648         return 0
 649 }
 650
 651 stop_service() {
 652         [ -f /tmp/resolv.conf ] && {
 653                 rm -f /tmp/resolv.conf
 654                 ln -s /tmp/resolv.conf.auto /tmp/resolv.conf
 655         }
 656         rm -f /var/run/dnsmasq.*.dhcp
 657 }