src/initscripts/system/unbound

   1 #!/bin/sh
   2 # Begin $rc_base/init.d/unbound
   3
   4 # Description : Unbound DNS resolver boot script for IPfire
   5 # Author      : Marcel Lorenz <marcel.lorenz@ipfire.org>
   6
   7 . /etc/sysconfig/rc
   8 . ${rc_functions}
   9
  10 # Cache any local zones for 60 seconds
  11 LOCAL_TTL=60
  12
  13 # Load configuration
  14 eval $(/usr/local/bin/readhash /var/ipfire/dns/settings)
  15 eval $(/usr/local/bin/readhash /var/ipfire/ethernet/settings)
  16
  17 ip_address_revptr() {
  18         local addr=${1}
  19
  20         local a1 a2 a3 a4
  21         IFS=. read -r a1 a2 a3 a4 <<< ${addr}
  22
  23         echo "${a4}.${a3}.${a2}.${a1}.in-addr.arpa"
  24 }
  25
  26 read_name_servers() {
  27         # Read name servers from ISP
  28         if [ "${USE_ISP_NAMESERVERS}" = "on" -a "${PROTO}" != "TLS" ]; then
  29                 local i
  30                 for i in 1 2; do
  31                         echo "$(</var/run/dns${i})"
  32                 done 2>/dev/null
  33         fi
  34
  35         # Read configured name servers
  36         local id address tls_hostname enabled remark
  37         while IFS="," read -r id address tls_hostname enabled remark; do
  38                 [ "${enabled}" != "enabled" ] && continue
  39
  40                 if [ "${PROTO}" = "TLS" ]; then
  41                         if [ -n "${tls_hostname}" ]; then
  42                                 echo "${address}@853#${tls_hostname}"
  43                         fi
  44                 else
  45                         echo "${address}"
  46                 fi
  47         done < /var/ipfire/dns/servers
  48 }
  49
  50 config_header() {
  51         echo "# This file is automatically generated and any changes"
  52         echo "# will be overwritten. DO NOT EDIT!"
  53         echo
  54 }
  55
  56 write_hosts_conf() {
  57         (
  58                 config_header
  59
  60                 # Make own hostname resolveable
  61                 # 1.1.1.1 is reserved for unused green, skip this
  62                 if [ -n "${GREEN_ADDRESS}" -a "${GREEN_ADDRESS}" != "1.1.1.1" ]; then
  63                         echo "local-data: \"${HOSTNAME} ${LOCAL_TTL} IN A ${GREEN_ADDRESS}\""
  64                 fi
  65
  66                 local address
  67                 for address in ${GREEN_ADDRESS} ${BLUE_ADDRESS} ${ORANGE_ADDRESS}; do
  68                         [ -n "${address}" ] || continue
  69                         [ "${address}" = "1.1.1.1" ] && continue
  70
  71                         address=$(ip_address_revptr ${address})
  72                         echo "local-data: \"${address} ${LOCAL_TTL} IN PTR ${HOSTNAME}\""
  73                 done
  74
  75                 local enabled address hostname domainname generateptr
  76
  77                 # Find all unique domain names
  78                 while IFS="," read -r enabled address hostname domainname generateptr; do
  79                         [ "${enabled}" = "on" ] || continue
  80
  81                         # Skip empty domainnames
  82                         [ "${domainname}" = "" ] && continue
  83
  84                         echo "local-zone: ${domainname} typetransparent"
  85                 done < /var/ipfire/main/hosts | sort -u
  86
  87                 # Add all hosts
  88                 while IFS="," read -r enabled address hostname domainname generateptr; do
  89                         [ "${enabled}" = "on" ] || continue
  90
  91                         # Build FQDN
  92                         local fqdn="${hostname}.${domainname}"
  93                         echo "local-data: \"${fqdn} ${LOCAL_TTL} IN A ${address}\""
  94
  95                         # Skip reverse resolution if the address equals the GREEN address
  96                         [ "${address}" = "${GREEN_ADDRESS}" ] && continue
  97
  98                         # Skip reverse resolution if user requested not to do so
  99                         [ "${generateptr}" = "off" ] && continue
 100
 101                         # Add RDNS
 102                         address=$(ip_address_revptr ${address})
 103                         echo "local-data: \"${address} ${LOCAL_TTL} IN PTR ${fqdn}\""
 104                 done < /var/ipfire/main/hosts
 105         ) > /etc/unbound/hosts.conf
 106 }
 107
 108 write_forward_conf() {
 109         (
 110                 config_header
 111
 112                 # Enable strict QNAME minimisation
 113                 if [ "${QNAME_MIN}" = "strict" ]; then
 114                         echo "server:"
 115                         echo "  qname-minimisation-strict: yes"
 116                         echo
 117                 fi
 118
 119                 # Force using TCP for upstream servers only
 120                 if [ "${PROTO}" = "TCP" ]; then
 121                         echo "# Force using TCP for upstream servers only"
 122                         echo "server:"
 123                         echo "  tcp-upstream: yes"
 124                         echo
 125                 fi
 126
 127                 local insecure_zones=""
 128
 129                 local enabled zone server servers remark disable_dnssec rest
 130                 while IFS="," read -r enabled zone servers remark disable_dnssec rest; do
 131                         # Line must be enabled.
 132                         [ "${enabled}" = "on" ] || continue
 133
 134                         # Zones that end with .local are commonly used for internal
 135                         # zones and therefore not signed
 136                         case "${zone}" in
 137                                 *.local)
 138                                         insecure_zones="${insecure_zones} ${zone}"
 139                                         ;;
 140                                 *)
 141                                         if [ "${disable_dnssec}" = "on" ]; then
 142                                                 insecure_zones="${insecure_zones} ${zone}"
 143                                         fi
 144                                         ;;
 145                         esac
 146
 147                         echo "stub-zone:"
 148                         echo "  name: ${zone}"
 149                         for server in ${servers//|/ }; do
 150                                 if [[ ${server} =~ ^[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
 151                                         echo "  stub-addr: ${server}"
 152                                 else
 153                                         echo "  stub-host: ${server}"
 154                                 fi
 155                         done
 156                         echo
 157
 158                         # Make all reverse lookup zones transparent
 159                         case "${zone}" in
 160                                 *.in-addr.arpa)
 161                                         echo "server:"
 162                                         echo "  local-zone: \"${zone}\" transparent"
 163                                         echo
 164                                         ;;
 165                         esac
 166                 done < /var/ipfire/dnsforward/config
 167
 168                 if [ -n "${insecure_zones}" ]; then
 169                         echo "server:"
 170
 171                         for zone in ${insecure_zones}; do
 172                                 echo "  domain-insecure: ${zone}"
 173                         done
 174                 fi
 175
 176                 # Read name servers.
 177                 nameservers=$(read_name_servers)
 178
 179                 # Only write forward zones if any nameservers are configured.
 180                 #
 181                 # Otherwise fall-back into recursor mode.
 182                 if [ -n "${nameservers}" ]; then
 183
 184                         echo "forward-zone:"
 185                         echo "  name: \".\""
 186
 187                         # Force using TLS only
 188                         if [ "${PROTO}" = "TLS" ]; then
 189                                 echo "  forward-tls-upstream: yes"
 190                         fi
 191
 192                         # Add upstream name servers
 193                         local ns
 194                         for ns in ${nameservers}; do
 195                                 echo "  forward-addr: ${ns}"
 196                         done
 197                 fi
 198
 199         ) > /etc/unbound/forward.conf
 200 }
 201
 202 write_tuning_conf() {
 203         # https://www.unbound.net/documentation/howto_optimise.html
 204
 205         # Determine amount of system memory
 206         local mem=$(get_memory_amount)
 207
 208         # In the worst case scenario, unbound can use double the
 209         # amount of memory allocated to a cache due to malloc overhead
 210
 211         # Even larger systems with more than 8GB of RAM
 212         if [ ${mem} -ge 8192 ]; then
 213                 mem=1024
 214
 215         # Extra large systems with more than 4GB of RAM
 216         elif [ ${mem} -ge 4096 ]; then
 217                 mem=512
 218
 219         # Large systems with more than 2GB of RAM
 220         elif [ ${mem} -ge 2048 ]; then
 221                 mem=256
 222
 223         # Medium systems with more than 1GB of RAM
 224         elif [ ${mem} -ge 1024 ]; then
 225                 mem=128
 226
 227         # Small systems with less than 256MB of RAM
 228         elif [ ${mem} -le 256 ]; then
 229                 mem=16
 230
 231         # Everything else
 232         else
 233                 mem=64
 234         fi
 235
 236         (
 237                 config_header
 238
 239                 # Slice up the cache
 240                 echo "rrset-cache-size: $(( ${mem} / 2 ))m"
 241                 echo "msg-cache-size: $(( ${mem} / 4 ))m"
 242                 echo "key-cache-size: $(( ${mem} / 4 ))m"
 243
 244                 # Increase parallel queries
 245                 echo "outgoing-range: 8192"
 246                 echo "num-queries-per-thread: 4096"
 247
 248                 # Use larger send/receive buffers
 249                 echo "so-sndbuf: 4m"
 250                 echo "so-rcvbuf: 4m"
 251         ) > /etc/unbound/tuning.conf
 252 }
 253
 254 get_memory_amount() {
 255         local key val unit
 256
 257         while read -r key val unit; do
 258                 case "${key}" in
 259                         MemTotal:*)
 260                                 # Convert to MB
 261                                 echo "$(( ${val} / 1024 ))"
 262                                 break
 263                                 ;;
 264                 esac
 265         done < /proc/meminfo
 266 }
 267
 268 fix_time_if_dns_fails() {
 269         # If DNS is working, everything is fine
 270         if resolve "ping.ipfire.org" &>/dev/null; then
 271                 return 0
 272         fi
 273
 274         # Try to sync time with a known time server
 275         boot_mesg "DNS not functioning... Trying to sync time with ntp.ipfire.org (81.3.27.46)..."
 276         loadproc /usr/local/bin/settime 81.3.27.46
 277 }
 278
 279 resolve() {
 280         local hostname="${1}"
 281         local found=1
 282
 283         local answer
 284         for answer in $(dig +short A "${hostname}"); do
 285                 # Filter out non-IP addresses
 286                 if [[ ! "${answer}" =~ \.$ ]]; then
 287                         found=0
 288                         echo "${answer}"
 289                 fi
 290         done
 291
 292         return ${found}
 293 }
 294
 295 # Sets up Safe Search for various search engines
 296 update_safe_search() {
 297         local google_tlds=(
 298                 google.ad
 299                 google.ae
 300                 google.al
 301                 google.am
 302                 google.as
 303                 google.at
 304                 google.az
 305                 google.ba
 306                 google.be
 307                 google.bf
 308                 google.bg
 309                 google.bi
 310                 google.bj
 311                 google.bs
 312                 google.bt
 313                 google.by
 314                 google.ca
 315                 google.cat
 316                 google.cd
 317                 google.cf
 318                 google.cg
 319                 google.ch
 320                 google.ci
 321                 google.cl
 322                 google.cm
 323                 google.cn
 324                 google.co.ao
 325                 google.co.bw
 326                 google.co.ck
 327                 google.co.cr
 328                 google.co.id
 329                 google.co.il
 330                 google.co.in
 331                 google.co.jp
 332                 google.co.ke
 333                 google.co.kr
 334                 google.co.ls
 335                 google.com
 336                 google.co.ma
 337                 google.com.af
 338                 google.com.ag
 339                 google.com.ai
 340                 google.com.ar
 341                 google.com.au
 342                 google.com.bd
 343                 google.com.bh
 344                 google.com.bn
 345                 google.com.bo
 346                 google.com.br
 347                 google.com.bz
 348                 google.com.co
 349                 google.com.cu
 350                 google.com.cy
 351                 google.com.do
 352                 google.com.ec
 353                 google.com.eg
 354                 google.com.et
 355                 google.com.fj
 356                 google.com.gh
 357                 google.com.gi
 358                 google.com.gt
 359                 google.com.hk
 360                 google.com.jm
 361                 google.com.kh
 362                 google.com.kw
 363                 google.com.lb
 364                 google.com.ly
 365                 google.com.mm
 366                 google.com.mt
 367                 google.com.mx
 368                 google.com.my
 369                 google.com.na
 370                 google.com.nf
 371                 google.com.ng
 372                 google.com.ni
 373                 google.com.np
 374                 google.com.om
 375                 google.com.pa
 376                 google.com.pe
 377                 google.com.pg
 378                 google.com.ph
 379                 google.com.pk
 380                 google.com.pr
 381                 google.com.py
 382                 google.com.qa
 383                 google.com.sa
 384                 google.com.sb
 385                 google.com.sg
 386                 google.com.sl
 387                 google.com.sv
 388                 google.com.tj
 389                 google.com.tr
 390                 google.com.tw
 391                 google.com.ua
 392                 google.com.uy
 393                 google.com.vc
 394                 google.com.vn
 395                 google.co.mz
 396                 google.co.nz
 397                 google.co.th
 398                 google.co.tz
 399                 google.co.ug
 400                 google.co.uk
 401                 google.co.uz
 402                 google.co.ve
 403                 google.co.vi
 404                 google.co.za
 405                 google.co.zm
 406                 google.co.zw
 407                 google.cv
 408                 google.cz
 409                 google.de
 410                 google.dj
 411                 google.dk
 412                 google.dm
 413                 google.dz
 414                 google.ee
 415                 google.es
 416                 google.fi
 417                 google.fm
 418                 google.fr
 419                 google.ga
 420                 google.ge
 421                 google.gg
 422                 google.gl
 423                 google.gm
 424                 google.gp
 425                 google.gr
 426                 google.gy
 427                 google.hn
 428                 google.hr
 429                 google.ht
 430                 google.hu
 431                 google.ie
 432                 google.im
 433                 google.iq
 434                 google.is
 435                 google.it
 436                 google.je
 437                 google.jo
 438                 google.kg
 439                 google.ki
 440                 google.kz
 441                 google.la
 442                 google.li
 443                 google.lk
 444                 google.lt
 445                 google.lu
 446                 google.lv
 447                 google.md
 448                 google.me
 449                 google.mg
 450                 google.mk
 451                 google.ml
 452                 google.mn
 453                 google.ms
 454                 google.mu
 455                 google.mv
 456                 google.mw
 457                 google.ne
 458                 google.nl
 459                 google.no
 460                 google.nr
 461                 google.nu
 462                 google.pl
 463                 google.pn
 464                 google.ps
 465                 google.pt
 466                 google.ro
 467                 google.rs
 468                 google.ru
 469                 google.rw
 470                 google.sc
 471                 google.se
 472                 google.sh
 473                 google.si
 474                 google.sk
 475                 google.sm
 476                 google.sn
 477                 google.so
 478                 google.sr
 479                 google.st
 480                 google.td
 481                 google.tg
 482                 google.tk
 483                 google.tl
 484                 google.tm
 485                 google.tn
 486                 google.to
 487                 google.tt
 488                 google.vg
 489                 google.vu
 490                 google.ws
 491         )
 492
 493         # Cleanup previous settings
 494         unbound-control local_zone_remove "bing.com" >/dev/null
 495         unbound-control local_zone_remove "duckduckgo.com" >/dev/null
 496         unbound-control local_zone_remove "yandex.com" >/dev/null
 497         unbound-control local_zone_remove "yandex.ru" >/dev/null
 498         unbound-control local_zone_remove "youtube.com" >/dev/null
 499
 500         local domain
 501         for domain in ${google_tlds[@]}; do
 502                 unbound-control local_zone_remove "${domain}"
 503         done >/dev/null
 504
 505         # Nothing to do if safe search is not enabled
 506         if [ "${ENABLE_SAFE_SEARCH}" != "on" ]; then
 507                 return 0
 508         fi
 509
 510         # Bing
 511         unbound-control bing.com transparent >/dev/null
 512         for address in $(resolve "strict.bing.com"); do
 513                 unbound-control local_data "www.bing.com ${LOCAL_TTL} IN A ${address}"
 514         done >/dev/null
 515
 516         # DuckDuckGo
 517         unbound-control local_zone duckduckgo.com typetransparent >/dev/null
 518         for address in $(resolve "safe.duckduckgo.com"); do
 519                 unbound-control local_data "duckduckgo.com ${LOCAL_TTL} IN A ${address}"
 520         done >/dev/null
 521
 522         # Google
 523         local addresses="$(resolve "forcesafesearch.google.com")"
 524         for domain in ${google_tlds[@]}; do
 525                 unbound-control local_zone "${domain}" transparent >/dev/null
 526                 for address in ${addresses}; do
 527                         unbound-control local_data "www.${domain} ${LOCAL_TTL} IN A ${address}"
 528                 done >/dev/null
 529         done
 530
 531         # Yandex
 532         for domain in yandex.com yandex.ru; do
 533                 unbound-control local_zone "${domain}" typetransparent >/dev/null
 534                 for address in $(resolve "familysearch.${domain}"); do
 535                         unbound-control local_data "${domain} ${LOCAL_TTL} IN A ${address}"
 536                 done >/dev/null
 537         done
 538
 539         # YouTube
 540         unbound-control local_zone youtube.com transparent >/dev/null
 541         for address in $(resolve "restrictmoderate.youtube.com"); do
 542                 unbound-control local_data "www.youtube.com ${LOCAL_TTL} IN A ${address}"
 543         done >/dev/null
 544
 545         return 0
 546 }
 547
 548 case "$1" in
 549         start)
 550                 # Print a nicer messagen when unbound is already running
 551                 if pidofproc -s unbound; then
 552                         statusproc /usr/sbin/unbound
 553                         exit 0
 554                 fi
 555
 556                 # Update configuration files
 557                 write_tuning_conf
 558                 write_hosts_conf
 559                 write_forward_conf
 560
 561                 boot_mesg "Starting Unbound DNS Proxy..."
 562                 loadproc /usr/sbin/unbound || exit $?
 563
 564                 # Install Safe Search rules when the system is already online
 565                 if [ -e "/var/ipfire/red/active" ]; then
 566                         update_safe_search
 567                 fi
 568                 ;;
 569
 570         stop)
 571                 boot_mesg "Stopping Unbound DNS Proxy..."
 572                 killproc /usr/sbin/unbound
 573                 ;;
 574
 575         restart)
 576                 $0 stop
 577                 sleep 1
 578                 $0 start
 579                 ;;
 580         reload|update-forwarders)
 581                 # Update configuration files
 582                 write_forward_conf
 583                 write_hosts_conf
 584
 585                 # Call unbound-control and perform the reload
 586                 /usr/sbin/unbound-control -q reload
 587
 588                 # Dummy Resolve to wait for unbound
 589                 resolve "ping.ipfire.org" &>/dev/null
 590
 591                 if [ "$1" = "update-forwarders" ]; then
 592                         # Make sure DNS works at this point
 593                         fix_time_if_dns_fails
 594                 fi
 595
 596                 # Update Safe Search rules if the system is online.
 597                 if [ -e "/var/ipfire/red/active" ]; then
 598                         update_safe_search
 599                 fi
 600                 ;;
 601
 602         status)
 603                 statusproc /usr/sbin/unbound
 604                 ;;
 605
 606         resolve)
 607                 resolve "${2}" || exit $?
 608                 ;;
 609
 610         *)
 611                 echo "Usage: $0 {start|stop|restart|reload|status|resolve|update-forwarders}"
 612                 exit 1
 613                 ;;
 614 esac
 615
 616 # End $rc_base/init.d/unbound