Changelog

1.5.0-alpha1

Released: 20th of March 2010

New Features

• Implement LuaFFIRule, LuaFFIAction and LuaFFIResponseAction

  References: #7617, pull request 8505

• Add SetNegativeAndSOAAction() and its Lua binding

  References: #4747, pull request 8171

• Implement dynamic blocking on ratio of rcode/total responses

  References: pull request 8274

• Add bounded loads to the consistent hashing policy

  References: #7387, pull request 8567

• Dnsdist: LogResponseAction (phonedph1)

  References: pull request 8654

• Add spoofRawAction() to craft answers from raw bytes

  References: pull request 8722

• Add support for Proxy Protocol between dnsdist and the recursor

  References: pull request 8874

• Implement bounded loads for the whashed and wrandom policies

  References: pull request 8909

Improvements

• Don’t accept sub-paths of configured DoH URLs

  References: #8573, pull request 8760

• Implement Cache-Control headers in DoH

  References: #8586, pull request 8762

• Document that the ‘keyLogFile’ option requires OpenSSL >= 1.1.1

  References: #8806, pull request 8899

• Change the default DoH path from / to /dns-query

  References: #8819, pull request 8905

• Add support for the processing of X-Forwarded-For headers

  References: #8661, pull request 8945

• Switch the default DoT provider from GnuTLS to OpenSSL

  References: pull request 8380

• Add the source and destination ports to the protobuf msg

  References: pull request 8702

• Better handling of reconnections in Remote Logger

  References: pull request 8887

• Rework NetmaskTree for better CPU and memory efficiency. (Stephan Bosch)

  References: pull request 8355

• Implement parallel health checks

  References: pull request 8491

• Use move semantics when updating the content of the StateHolder

  References: pull request 8538

• Keep a masked network in the Netmask class

  References: pull request 8812

• Make FrameStream IO parameters configurable

  References: pull request 8937

• Add backend status to prometheus metrics

  References: #8746, pull request 8772

• Add ‘IO wait’ and ‘steal’ metrics on Linux

  References: pull request 8783

• Don’t start as root within a systemd environment

  References: pull request 7820

• Separate the check-config and client modes

  References: pull request 8456

• Add the number of received bytes to StatNode entries

  References: pull request 8529

• Support setting the value of AA, AD and RA when self-generating answers

  References: #8534, pull request 8556

• pthread_rwlock_init() should be matched by pthread_rwlock_destroy()

  References: pull request 8580

• Replace include guard ifdef/define with pragma once (Chris Hofstaedtler)

  References: pull request 8631

• Allow retrieving and deleting a backend via its UUID

  References: pull request 8657

• Load an openssl configuration file, if any, during startup

  References: pull request 8733

• Add get*BindCount() functions

  References: pull request 8848

• Add sessionTimeout setting for TLS session lifetime (Matti Hiljanen)

  References: pull request 8882

• Detect {Libre,Open}SSL functions availability during configure

  References: #8739, pull request 8900

• Warn on startup about low weight values with chashed

  References: #8669, pull request 8950

Bug Fixes

• Set the DoH ticket rotation delay before loading tickets

  References: pull request 8949

• Display the correct DoT provider

  References: pull request 8662

• Use ref counting for the DoT TLS context

  References: pull request 8761

• Add ‘queue full’ metrics for our remote logger, log at debug only

  References: #8629, pull request 8883

• Fix ECS addition when the OPT record is not the last one

  References: #8098, pull request 8115

• Wait longer for the TLS ticket to arrive in our tests

  References: pull request 8591

• Add missing exception message in KVS error

  References: pull request 8604

• Add getTag()/setTag() Lua bindings for a DNSResponse

  References: pull request 8782

• Fix key logging for DNS over TLS

  References: #8442, pull request 8787

• Fix a typo in the help/completion for getDNSCryptBindCount

  References: pull request 8855

• Implement rmACL() (swoga)

  References: pull request 8856

• Remove unused lambda capture reported by clang++

  References: pull request 8879

1.4.0

Released: 20th of November 2019

Improvements

• Fix the default value of setMaxUDPOutstanding in the console’s help (phonedph1)

  References: pull request 8531

• Add bindings for the noerrors and drops members of StatNode

  References: pull request 8522

• Fix -WShadow warnings (Aki Tuomi)

  References: pull request 8440

• Fix typo: settting to setting (Chris Hofstaedtler)

  References: pull request 8509

Bug Fixes

• Lowercase the name blocked by a SMT dynamic block

  References: pull request 8524

misc

• Prefer the cipher suite from the server by default (DoH, DoT)

  References: pull request 8526

1.4.0-rc5

Released: 30th of October 2019

Improvements

• Rename the ‘address’ label to ‘frontend’ for DoH metrics

  References: pull request 8465

Bug Fixes

• Increment the DOHUnit ref count when it’s set in the IDState

  References: pull request 8471

1.4.0-rc4

Released: 25th of October 2019

New Features

• Add support dumping TLS keys via keyLogFile

  References: pull request 8442

Improvements

• Implement reference counting for the DOHUnit object

  References: pull request 8416

• Add metrics about TLS handshake failures for DoH and DoT

  References: pull request 8447

• Merge the setup of TLS contexts in DoH and DoT

  References: pull request 8383

• Add metrics about unknown/inactive TLS ticket keys

  References: pull request 8406

• Count the number of concurrent connections for DoH as well

  References: pull request 8395

• Add a ‘preferServerCiphers’ option for DoH and DoT

  References: pull request 8382

• Lowercase custom DoH header names

  References: #8353, pull request 8365

• Refactor DoH prometheus metrics again

  References: pull request 8361

• Add metrics about TLS versions with DNS over TLS

  References: pull request 8387

• Add more options to LogAction (non-verbose mode, timestamps)

  References: #8390, pull request 8411

• Fix formatting in showTCPStats()

  References: pull request 8415

• Use SO_BINDTODEVICE when available for newServer’s source interface

  References: pull request 8372

• Check the address supplied to ‘webserver’ in check-config

  References: #8362, pull request 8364

Bug Fixes

• Clear the DoH session ticket encryption key in the ctor

  References: pull request 8388

• Add missing prometheus descriptions for cache-related metrics

  References: pull request 8409

• Add a prometheus ‘thread’ label to distinguish identical frontends

  References: pull request 8381

• Fix a typo in the prometheus description of ‘senderrors’

  References: pull request 8378

• More prometheus fixes

  References: pull request 8368

• Fix the caching of large entries

  References: pull request 8408

• Work around cmsg_space somehow not being a constexpr on macOS

  References: #8412, pull request 8413

• Fix the creation order of rules when inserted via setRules()

  References: pull request 8359

1.4.0-rc3

Released: 30th of September 2019

Improvements

• Display the DoH and DoT binds in the web view

  References: pull request 8264

• Allow accepting DoH queries over HTTP instead of HTTPS

  References: pull request 8267

• Implement TLS session ticket keys management for DoH

  References: pull request 8349

• Clean up our interactions with errno

  References: #7845, pull request 8083

• Remove the ‘blockfilter’ stat from the web view

  References: #5514, pull request 8265

• Fix some spelling mistakes noticed by lintian (Chris Hofstaedtler)

  References: pull request 8268

• dnsdistconf.lua use non-deprecated versions for 1.4.0 (phonedph1)

  References: pull request 8285

• Better use of labels in our DoH prometheus export

  References: pull request 8318

Bug Fixes

• Fix the newCDBKVStore console completion when LMDB is not enabled (phonedph1)

  References: pull request 8281

• Allow configure CDB_CFLAGS to work (phonedph1)

  References: pull request 8283

• Fix the warning message on an invalid secpoll answer

  References: pull request 8303

• Don’t connect to remote logger in client/command mode

  References: #8300, pull request 8304

1.4.0-rc2

Released: 2nd of September 2019

New Features

• Add support for early DoH HTTP responses

  References: pull request 8206

• Add a KeyValueStoreLookup action based on CDB or LMDB

  References: pull request 8139

Improvements

• Add minTLSVersion for DoH and DoT

  References: #8202, pull request 8207

• Split dnsdist-lua-bindings.cc to reduce memory consumption during compilation

  References: pull request 8250

• Add a Lua binding for dynBlockRulesGroup:setQuiet(quiet)

  References: pull request 8252

misc

• Update h2o to 2.2.6, fixing CVE-2019-9512, CVE-2019-9514 and CVE-2019-9515 for repo.powerdns.com packages

  References: pull request 8200

1.4.0-rc1

Released: 12th of August 2019

New Features

• Add OCSP stapling (from files) for DoT and DoH

  References: #7812, pull request 8141

• Add support for custom DoH headers (Melissa Voegeli)

  References: #7957, #7900, pull request 8148

• Add lua bindings, rules and action for DoH

  References: #8133, pull request 8153

• Implement ContinueAction()

  References: pull request 8117

Improvements

• Send better HTTP status codes, handle ACL drops earlier

  References: pull request 7917

• Add more stats about DoH HTTP responses

  References: #7898, pull request 7933

• Improve error messages for DoT issues

  References: pull request 7978

• Accept more than one certificate in addDNSCryptBind()

  References: #8020, pull request 8042

• Disallow TCP disablement

  References: pull request 7860

• Update boost.m4 to the latest version

  References: pull request 7862

• Print stats from expungeByName (Matti Hiljanen)

  References: pull request 7909

• Squelch unused function warning

  References: #7950, pull request 7952

• SuffixMatchNode:add(): accept more types

  References: pull request 7985

• Explicitly align the buffer used for cmsgs

  References: #7981, pull request 7990

• Add quiet parameter to NetmaskGroupRule

  References: pull request 7992

• Clear cmsg_space(sizeof(data)) in cmsghdr to appease Valgrind

  References: #7981, pull request 7996

• Add static assertions for the size of the src address control buffer

  References: pull request 8007

• Don’t create temporary strings to escape DNSName labels

  References: pull request 8013

• Display TCP/DoT queries and responses in verbose mode, opcode in grepq

  References: pull request 8024

• Be a bit more explicit about what failed in testCrypto()

  References: pull request 8025

• Update URLs to use HTTPS scheme (Chris Hofstaedtler)

  References: pull request 8110

• Double-check we only increment the outstanding counter once

  References: pull request 8113

• ext/ipcrypt: ship license in tarballs (Chris Hofstaedtler)

  References: #8108, pull request 8135

• Use a counter to mark IDState usage instead of the FD

  References: pull request 8154

• Increase the default value of setMaxUDPOutstanding to 65535

  References: pull request 8175

Bug Fixes

• Properly override the HTTP Server header for DoH

  References: #7894, pull request 7911

• Exit when requested DoT/DoH support is not compiled in

  References: pull request 7915

• Proper HTTP response for timeouts over DoH

  References: #7917, pull request 7927

• Prevent a dangling DOHUnit pointer when send() failed

  References: pull request 8112

• Skip non-dnscrypt binds in showDNSCryptBinds()

  References: #8014, pull request 8015

• SuffixMatchTree: fix root removal, partial match of non-leaf nodes

  References: pull request 7886

• Deduplicate frontends entries with carbon and prometheus

  References: #7933, pull request 7934

• Update boost.m4

  References: #8084, #6942, pull request 7951

• Fix short IOs over TCP

  References: #7971, pull request 7974

• Fix handling of backend connection failing over TCP

  References: pull request 7979

• Insert the response into the ringbuffer right after sending it

  References: pull request 8003

• Handle ENOTCONN on read() over TCP

  References: #8021, pull request 8030

• Make sure we always compile with BOOST_CB_ENABLE_DEBUG set to 0

  References: pull request 8067

• Catch exceptions thrown when handling a TCP response

  References: pull request 8078

• Fix unlimited retries when TCP Fast Open is enabled

  References: pull request 8079

• M4/systemd.m4: fail when systemctl is not available

  References: pull request 8081

• Fix a typo in the Server’s latency description for Prometheus (phonedph1)

  References: pull request 8105

• Console: flush cout after printing g_outputbuffer (Doug Freed)

  References: #8130, pull request 8131

• Fix signedness issue in isEDNSOptionInOpt()

  References: pull request 8158

1.4.0-beta1

Released: 6th of June 2019

New Features

• Implement SNIRule for DoT and DoH

  References: #7210, pull request 7825

Improvements

• Support Prometheus latency histograms (Marlin Cremers)

  References: #6088, pull request 7853

Bug Fixes

• DoH: Don’t let ‘self’ dangling while parsing the request’s qname, this could lead to a crash

  References: #7810, pull request 7814

• Fix minor issues reported by Coverity

  References: pull request 7823

• Remove second, incomplete copy of lua EDNSOptionCode table

  References: pull request 7833

1.4.0-alpha2

Released: 26th of April 2019

New Features

• Add DNS over HTTPS support based on libh2o

  References: #7526, #6911, pull request 7726

Improvements

• Ignore Path MTU discovery on UDP server socket

  References: pull request 7410

• Alternative solution to the unaligned accesses.

  References: pull request 7708

Bug Fixes

• Exit when setting ciphers fails (GnuTLS)

  References: pull request 7718

1.4.0-alpha1

Released: 12th of April 2019

New Features

• Make recursor & dnsdist communicate (ECS) ‘variable’ status

  References: pull request 7209

• Add namespace and instance variable to carbon key (Gibheer)

  References: #6941, #2362, pull request 6959

• Allow NoRecurse for use in dynamic blocks or Lua rules (phonedph1)

  References: pull request 7087

• Expose secpoll status

  References: #7194, pull request 7197

• Add an optional ‘checkTimeout’ parameter to ‘newServer()’

  References: #7236, pull request 7323

• Add a ‘rise’ parameter to ‘newServer()’

  References: #7237, pull request 7322

• Add a ‘keepStaleData’ option to the packet cache

  References: #7239, pull request 7310

• Expose trailing data (Richard Gibson)

  References: #6846, #6897, pull request 6967

• Add option to set interval between health checks (1848)

  References: pull request 7142

• Add EDNS unknown version handling (Dmitry Alenichev)

  References: pull request 7406

• DNSNameSet and QNameSetRule (Andrey)

  References: pull request 7537

• Add support for encrypting ip addresses #gdpr

  References: #6242, pull request 7481

• Add ‘setSyslogFacility()’

  References: #5653, pull request 7677

• Add ‘reloadAllCertificates()’

  References: pull request 7676

Improvements

• Fix warnings, mostly unused parameters, reported by -wextra

  References: pull request 7168

• Add optional uuid column to showServers()

  References: pull request 7191

• Configure –enable-pdns-option –with-third-party-module (Josh Soref)

  References: pull request 7026

• Drop remaining capabilities after startup

  References: pull request 7138

• More sandboxing using systemd’s features

  References: pull request 6634

• Reduce systemcall usage in Protobuf logging

  References: pull request 7428

• Resync YaHTTP code to cmouse/yahttp@11be77a1fc4032 (Chris Hofstaedtler)

  References: pull request 7433

• Pass empty response (Dmitry Alenichev)

  References: pull request 7431

• Change the way getRealMemusage() works on linux (using statm)

  References: pull request 7502

• Prevent 0-ttl cache hits

  References: #7534, pull request 7585

• Add addDynBlockSMT() support to dynBlockRulesGroup

  References: #7139, pull request 7343

• Add frontend response statistics (Matti Hiljanen)

  References: pull request 7578

• Remove addLuaAction and addLuaResponseAction

  References: pull request 7670

• Refactoring of the TCP stack

  References: #7526, #4814, pull request 7559

• Prevent a conflict with BADSIG being clobbered

  References: #7556, pull request 7692

• Switch to the new ‘newPacketCache()’ syntax for 1.4.0

  References: pull request 7689

• Move constants to proper namespace

  References: pull request 7678

• Unify the management of DNS/DNSCrypt/DoT frontends

  References: pull request 7694

• Fix compiler warning about returning garbage (Adam Majer)

  References: pull request 7167

Bug Fixes

• Protect GnuTLS tickets key rotation with a read-write lock

  References: pull request 7256

• Check that SO_ATTACH_BPF is defined before enabling eBPF

  References: pull request 7267

• Fix off-by-one in mvRule counting

  References: pull request 7426

• Don’t convert nsec to usec if we need nsec

  References: pull request 7520

• Fix setRules()

  References: pull request 7594

• Handle EAGAIN in the GnuTLS DNS over TLS provider

  References: pull request 7560

• Gracefully handle a null latency in the webserver’s js

  References: #7461, pull request 7586

• EDNSOptionView improvements

  References: pull request 7652

• Honor libcrypto include path

  References: #7481, pull request 7674

1.3.3

Released: 8th of November 2018

New Features

• Add consistent hash builtin policy

  References: #6932, pull request 6939, pull request 6737

• Add EDNSOptionRule

  References: pull request 6803

• Add DSTPortRule (phonedph1)

  References: pull request 6813

• Make getOutstanding usable from both lua and console (phonedph1)

  References: pull request 6826

• Added :excludeRange and :includeRange methods to DynBPFFilter class (Reinier Schoof)

  References: pull request 6856

• Add Prometheus stats support (Pavel Odintsov, Kai S)

  References: #4947, #6002, pull request 3935, pull request 7089, pull request 6343, pull request 6901, pull request 7007

• Name threads in the programs

  References: #6974, pull request 6997

• Support the NXDomain action with dynamic blocks

  References: #6908, pull request 7075

• Add security polling

  References: pull request 7115

• Add a PoolAvailableRule to easily add backup pools (Robin Geuze)

  References: pull request 7140

Improvements

• Get rid of some allocs/copies in DNS parsing

  References: pull request 6831

• Set a correct EDNS OPT RR for self-generated answers

  References: #4857, #6348, pull request 6847

• Fix a sign-comparison warning in isEDNSOptionInOPT()

  References: pull request 6877

• Add warning rates to DynBlockRulesGroup rules

  References: #6907, pull request 6986

• Add support for exporting a server id in protobuf

  References: #6990, #7004, pull request 7015

• dnsdist did not set TCP_NODELAY, causing needless latency

  References: pull request 7030

• Add a setting to control the number of stored sessions

  References: pull request 7062

• Wrap GnuTLS and OpenSSL pointers in smart pointers

  References: #7060, pull request 7064

• Add a ‘creationOrder’ field to rules

  References: #6909, pull request 7078

• Fix return-type detection with boost 1.69’s tribool

  References: #7091, pull request 7092

• Fix format string issue on 32bits ARM

  References: #7096, pull request 7104

• Wrap TCP connection objects in smart pointers

  References: pull request 7108

• Add the setConsoleOutputMaxMsgSize function

  References: #7084, pull request 7109

• Add the ability to update webserver credentials

  References: #7112, pull request 7117

Bug Fixes

• Display dynblocks’ default action, None, as the global one

  References: pull request 6835

• Fix compilation when SO_REUSEPORT is not defined

  References: pull request 6956

• Release memory on DNS over TLS handshake failure

  References: pull request 7060

• Handle trailing data correctly when adding OPT or ECS info

  References: #6896, pull request 7165

1.3.2

Released: 10th of July 2018

Bug Fixes

• Add missing include for PRId64, fix build on CentOS 6 / SLES 12

  References: pull request 6785

1.3.1

Released: 10th of July 2018

New Features

• Add support for more than one TLS certificate

  References: #6450, pull request 6524

• Add a negative ttl option to the packet cache

  References: #6579, pull request 6740

• Add the ability to dump a summary of the cache content

  References: pull request 6749

• Add netmask-based {ex,in}clusions to DynblockRulesGroup

  References: pull request 6760

• Add DNSAction.NoOp to debug dynamic blocks

  References: #6703, pull request 6776

• Add SetECSAction to set an arbitrary outgoing ecs value

  References: #6404, pull request 6734

• Add support for rotating certificates and keys

  References: pull request 6764

Improvements

• Remove thelog and thel and replace this with a global g_log

  References: #6357, pull request 6358

• Fix two small nits on the documentation

  References: pull request 6422

• Move the el6 dnsdist package to upstart

  References: #6394, pull request 6426

• CLI option improvements (Chris Hofstaedtler)

  References: #6433, pull request 6435

• Split pdns_enable_unit_tests (Chris Hofstaedtler)

  References: pull request 6436

• Re-do lua detection

  References: #6423, pull request 6445, pull request 6470, pull request 6457

• Docs: fix missing ref in the dnsdist docs

  References: pull request 6460

• Be more permissive in wrandom tests, log values on failure

  References: pull request 6502

• Tests: avoid failure on not-so-optimal distribution

  References: #6430, pull request 6523

• Add syntax to dns.proto to silence compilation warning.

  References: pull request 6577

• Fix warnings reported by gcc 8.1.0

  References: pull request 6590

• Document setVerboseHealthchecks()

  References: #6483, pull request 6592

• Update dq.rst (phonedph1)

  References: pull request 6615

• Fix rpm scriptlets

  References: pull request 6641

• Don’t copy unitialized values of SuffixMatchTree

  References: pull request 6637

• Expose toString of various objects to Lua (Chris Hofstaedtler)

  References: pull request 6684

• Remove ‘expired’ states from MaxQPSIPRule

  References: pull request 6674

• Mark the remote member of DownstreamState as const

  References: #6664, pull request 6688

• Test the content of dynamic blocks using the API

  References: #6706, pull request 6710

• Default set “connection: close” header for web requests

  References: #6532, pull request 6711

• Update timedipsetrule.rst (phonedph1)

  References: pull request 6717

• Don’t access the TCP buffer vector past its size

  References: #6712, pull request 6716

• Show droprate in API output

  References: pull request 6563

• Refuse console connection without a proper key set

  References: #6709, #6683, pull request 6715

• Use LRU to clean the MaxQPSIPRule’s store

  References: pull request 6726

• Disable maybe uninitialized warnings with boost optional

  References: pull request 6769

• Luawrapper: report caught std::exception as lua_error

  References: #6541, pull request 6658

• Dnstap.rst: fix some editing errors (Chris Hofstaedtler)

  References: pull request 6602

• Allow known exception types to be converted to string

  References: #6535, pull request 6541

Bug Fixes

• Initialize the done variable in the rings’ unit tests

  References: pull request 6425

• Reorder headers to fix OpenBSD build

  References: pull request 6429

• Restrict value range for weight parameter, avoid sum overflows dropping queries (Dan McCombs)

  References: pull request 6448

• Fix reconnection handling

  References: pull request 6672

• Dynamic blocks were being created with the wrong duration (David Freedman)

  References: pull request 6706

• Limit qps and latency to two decimals in the web view

  References: #6442, pull request 6718

• Check the flags to detect collisions in the packet cache

  References: pull request 6747

• Fix iterating over the results of exceed*() functions

  References: pull request 6762

• Fix duration false positive in the dynblock regression tests

  References: pull request 6767

• Implement NoneAction()

  References: #6758, pull request 6775

• Detect ECS collisions in the packet cache

  References: #6747, pull request 6754

• Fix an outstanding counter race when reusing states

  References: pull request 6773

1.3.0

Released: 30th of March 2018

New Features

• Add an optional status parameter to Server:setAuto().

  References: pull request 5625

• Add inClientStartup() function.

  References: pull request 6072

• Add tag-based routing of queries.

  References: pull request 6037

• Add experimental DNS-over-TLS support.

  References: pull request 6176, pull request 6177, pull request 6117, pull request 6175, pull request 6189

• Add simple dnstap support (Justin Valentini, Chris Hofstaedtler).

  References: pull request 5201, pull request 6170

• Add experimental XPF support based on draft-bellis-dnsop-xpf-04.

  References: #5654, #5079, pull request 6220, pull request 5594

• Add ERCodeRule() to match on extended RCodes (Chris Hofstaedtler).

  References: pull request 6147

• Add TempFailureCacheTTLAction() (Chris Hofstaedtler).

  References: pull request 6003

• Add DynBlockRulesGroup to improve processing speed of the maintenance() function by reducing memory usage and not walking the ringbuffers multiple times.

  References: pull request 6391

• Add console ACL functions.

  References: #4654, pull request 6399

• Allow adding EDNS Client Subnet information to a query before looking in the cache. This allows serving ECS enabled answers from the cache when all servers in a pool are down.

  References: #6098, pull request 6400

Improvements

• Add cache sharding, recvmmsg and CPU pinning support. With these, the scalability of dnsdist is drastically improved.

  References: #5202, #5859, pull request 5576, pull request 5860

• Add burst option to MaxQPSIPRule() (42wim).

  References: pull request 5970

• Add Pools, cacheHitResponseRules to the API.

  References: pull request 6022

• Add a class option to health checks.

  References: #5748, pull request 5929

• Add UUIDs to rules, this allows tracking rules through modifications and moving them around.

  References: pull request 6030

• Apply ResponseRules to locally generated answers (Chris Hofstaedtler).

  References: #6182, pull request 6185

• Report LuaAction() and LuaResponseAction() failures in the log and send SERVFAIL instead of not answering the query (Chris Hofstaedtler).

  References: pull request 6283

• Unify global statistics accounting (Chris Hofstaedtler).

  References: pull request 6289

• Speed up the processing of large ring buffers. This change will make dnsdist more scalable with a large number of different clients.

  References: pull request 6366, pull request 6350

• Make custom addLuaAction() and addLuaResponseAction() callback’s second return value optional.

  References: #6346, pull request 6363

• Add “server-up” metric count to Carbon Reporting (Lowell Mower).

  References: pull request 6327

• Add xchacha20 support for DNSCrypt.

  References: pull request 6045, pull request 6382

• Scalability improvement: Add an option to use several source ports towards a backend.

  References: pull request 6317

• Add ‘?’ and ‘help’ for providing help() output on dnsdist -c (Kirill Ponomarev, Chris Hofstaedtler).

  References: #4845, pull request 5866, pull request 6375

• Replace the Lua mutex with a rw lock to limit contention. This improves the processing speed and parallelism of the policies.

  References: pull request 6190, pull request 6381

• Ensure dnsdist compiles on NetBSD (Tom Ivar Helbekkmo).

  References: pull request 6146

• Also log eBPF dynamic blocks, as regular dynamic block already are.

  References: #5845, pull request 5845

• Ensure large numbers are shown correctly in the API.

  References: #6211, pull request 6401

• Add option to showRules() to truncate the output length.

  References: #5763, pull request 6402

• Fix several warnings reported by clang’s analyzer and cppcheck, should lead to small performance increases.

  References: pull request 6407

Bug Fixes

• Handle SNMP alarms so we can reconnect to the master.

  References: #5327, pull request 5328

• Fix signed/unsigned comparison warnings on ARM.

  References: #5489, pull request 5597

• Keep trying if the first connection to the remote logger failed

  References: pull request 5770

• Fix escaping unusual DNS label octets in DNSName is off by one (Kees Monshouwer).

  References: pull request 6018

• Avoid assertion errors in NewServer() (Chris Hofstaedtler).

  References: pull request 6403

Removals

• Remove the --daemon option from dnsdist.

  References: #6329, pull request 6394

1.2.1

Released: 16th of February 2018

New Features

• Add configuration option to disable IP_BIND_ADDRESS_NO_PORT (Dan McCombs).

  References: pull request 5880

Improvements

• Handle bracketed IPv6 addresses without ports (Chris Hofstaedtler).

  References: pull request 6057

Bug Fixes

• Make dnsdist dynamic truncate do right thing on TCP/IP.

  References: pull request 5647

• Add missing QPSAction

  References: pull request 5686

• Don’t create a Remote Logger in client mode.

  References: pull request 5847

• Use libsodium’s CFLAGS, we might need them to find the includes.

  References: pull request 5858

• Keep the TCP connection open on cache hit, generated answers.

  References: pull request 6012

• Add the missing <sys/time.h> include to mplexer.hh for struct timeval.

  References: pull request 6041

• Sort the servers based on their ‘order’ after it has been set.

  References: pull request 6043

• Quiet unused variable warning on macOS (Chris Hofstaedtler).

  References: pull request 6073

• Fix the outstanding counter when an exception is raised.

  References: #5652, pull request 6094

• Do not connect the snmpAgent from a dnsdist client.

  References: #6163, pull request 6164

1.2.0

Released: 21st of August 2017

New Features

• Add an option to export CNAME records over protobuf.

  References: #4709, pull request 4776

• Add TCP management options from RFC 7766 section 10.

  References: pull request 4611

• Add an option to ‘mute’ UDP responses per bind.

  References: #4527, pull request 4536

• Save history to home-dir, only use CWD as a last resort.

  References: #4562, pull request 4779

• Add the setRingBuffersSize() directive to allows changing the ringbuffer size.

  References: pull request 4898

• Allow TTL alteration via Lua.

  References: #4707, pull request 4787

• Add RDRule() to match queries with the RD flag set.

  References: pull request 4837

• Add setWHashedPertubation() for consistent whashed results.

  References: pull request 4897

• Add tcpConnectTimeout to newServer().

  References: pull request 4818

• Add cache hit response rules.

  References: #4708, pull request 5036, pull request 4788

• Add SNMP support.

  References: pull request 4989, pull request 5204, pull request 5123

• Allow passing DNSNames as DNSRules.

  References: pull request 5070

• Add support for setting the server selection policy on a per pool basis (Robin Geuze).

  References: pull request 5113

• Add a suffixMatch parameter to PacketCache:expungeByName() (Robin Geuze).

  References: pull request 5159

• Add an option so the packet cache entries don’t age.

  References: #5126, pull request 5136

• Add QNameRule().

  References: pull request 5235

• Add an optional action to addDynBlocks().

  References: pull request 5337

• Add an optional interface parameter to addLocal()/setLocal().

  References: pull request 5344

• Make a truncate action available to DynBlock and Lua.

  References: pull request 5386

• Implement a runtime changeable rule that matches IP address for a certain time called TimedIPSetRule().

  References: pull request 5336

• Add support for returning several IPs to spoof from Lua.

  References: pull request 5496

• Add Lua bindings to be able to rotate DNSCrypt keys, see DNSCrypt.

  References: #5507, #5420, pull request 5490, pull request 5508

• Add the capability to set arbitrary tags in protobuf messages.

  References: pull request 5577, pull request 5396

• Add setConsoleConnectionsLogging().

  References: #5565, pull request 5581

Improvements

• Merge the client and server nonces to prevent replay attacks.

  References: pull request 4815

• Store the computed shared key and reuse it for the response for DNSCrypt messages.

  References: pull request 4813, pull request 4926

• Add setTCPUseSinglePipe() to use a single TCP waiting queue.

  References: pull request 4817

• Add sendSizeAndMsgWithTimeout to send size and data in a single call and use it for TCP Fast Open towards backends.

  References: #5494, pull request 4985, pull request 5501

• Tune systemd unit-file for medium-sized installations (Winfried Angele).

  References: pull request 4958

• Add the possibility to fill a NetmaskGroup (using NetmaskGroup:addMask()) from exceeds* results.

  References: pull request 5185

• Add labels count to StatNode, only set the name once.

  References: pull request 5353

• DNSName: Check that both first two bits are set in compressed labels.

  References: #4851, pull request 4852

• Handle unreachable servers at startup, reconnect stale sockets

  References: #4131, #4155, pull request 4285

• Gracefully handle invalid addresses in newServer().

  References: #4471, pull request 4474

• Use IP_BIND_ADDRESS_NO_PORT when available.

  References: pull request 4786

• Add an optional seconds parameter to statNodeRespRing().

  References: #4775, #4660, pull request 4780

• Report a more specific lua version and report luajit in --version.

  References: pull request 4910

• Prevent issues by unshadowing variables.

  References: pull request 5056

• Register DNSName::chopOff (@plzz).

  References: pull request 4920

• Make includeDirectory() work sorted (Robin Geuze).

  References: #5053, pull request 5150, pull request 5171

• Allow embedded NULs in strings received from Lua.

  References: pull request 5147

• Cleanup closed TCP downstream connections.

  References: pull request 5163

• Improve reporting of C++ exceptions that bubble up via Lua.

  References: pull request 5230

• Add better logging on queries that get dropped, timed out or received.

  References: pull request 5253

• Print useful messages when query and response actions are mixed.

  References: pull request 5342

• Add DNSRule::toString() and add virtual destructors to DNSRule, DNSAction and DNSResponseAction so the destructors of derived classes are run even when deleted via the base type.

  References: pull request 5497

• Don’t use square brackets for IPv6 in Carbon metrics.

  References: #5538, pull request 5579

Bug Fixes

• Unified -k and setKey() behaviour for client and server mode now.

  References: pull request 5199

• Refactor SuffixMatchNode using a SuffixMatchTree.

  References: #4761, pull request 4950

• Get rid of std::move() calls preventing copy elision.

  References: pull request 5359

• Send an HTTP 404 on unknown API paths.

  References: pull request 5089

• LuaWrapper: Use the correct index when storing a function.

  References: pull request 4775

• Send a latency of 0 over carbon, null over API for down servers.

  References: #4689, pull request 4785

• Fix negative port detection for IPv6 addresses on 32-bit.

  References: pull request 4911

• Fix crashed on SmartOS/Illumos (Roman Dayneko).

  References: #4579, pull request 4877

• Change truncateTC to defaulting to off, having it enabled by default causes an compatibility with RFC 6891 (Robin Geuze).

  References: #4857, pull request 4859

• Don’t cache answers without any TTL (like SERVFAIL).

  References: #4983, pull request 5037, pull request 4987

• Fix destination port reporting on “any” binds.

  References: pull request 5194

• Correctly truncate EDNS Client Subnetmasks.

  References: pull request 5320

• Fix RecordsTypeCountRule()’s handling of the # of records in a section.

  References: #5365, pull request 5369

• Change stats functions to always return lowercase names (Robin Geuze).

  References: #5287, pull request 5383

• Only use TCP Fast Open when supported and prevent compiler warnings.

  References: pull request 5449, pull request 5454

• Skip timeouts on the response latency graph.

  References: #5559, pull request 5563

• Copy the DNS header before encrypting it in place.

  References: #5566, pull request 5580

Removals

• Remove BlockFilter.

  References: #5513, pull request 5514

• Deprecate syntactic sugar functions.

  References: #5069, pull request 5526

misc

• Fix potential pointer wrap-around on 32 bits.

  References: pull request 5630

• Make the API available with an API key only.

  References: pull request 5631

1.1.0

Released December 29th 2016

Changes since 1.1.0-beta2:

Improvements

• #4783: Add -latomic on powerpc
• #4812: Handle header-only responses, handle Refused as Servfail in the cache

Bug fixes

• #4762: SuffixMatchNode: Fix an insertion issue for an existing node
• #4772: Fix dnsdist initscript config check

1.1.0-beta2

Released December 14th 2016

Changes since 1.1.0-beta1:

New features

• #4518: Fix dynblocks over TCP, allow refusing dyn blocked queries
• #4519: Allow altering the ECS behavior via rules and Lua
• #4535: Add DNSQuestion:getDO()
• #4653: getStatisticsCounters() to access counters from Lua
• #4657: Add includeDirectory(dir)
• #4658: Allow editing the ACL via the API
• #4702: Add setUDPTimeout(n)
• #4726: Add an option to return ServFail when no server is available
• #4748: Add setCacheCleaningPercentage()

Improvements

• #4533: Fix building with clang on OS X and FreeBSD
• #4537: Replace luawrapper’s std::forward/std::make_tuple combo with std::forward_as_tuple (Sangwhan “fish” Moon)
• #4596: Change the default max number of queued TCP conns to 1000
• #4632: Improve dnsdist error message on a common typo/config mistake
• #4694: Don’t use a const_iterator for erasing (fix compilation with some versions of gcc)
• #4715: Specify that dnsmessage.proto uses protobuf version 2
• #4765: Some service improvements

Bug fixes

• #4425: Fix a protobuf regression (requestor/responder mix-up) caused by a94673e
• #4541: Fix insertion issues in SuffixMatchTree, move it to dnsname.hh
• #4553: Flush output in single command client mode
• #4578: Fix destination address reporting
• #4640: Don’t exit dnsdist on an exception in maintenance
• #4721: Handle exceptions in the UDP responder thread
• #4734: Add the TCP socket to the map only if the connection succeeds. Closes #4733
• #4742: Decrement the queued TCP conn count if writing to the pipe fails
• #4743: Ignore newBPFFilter() and newDynBPFFilter() in client mode
• #4753: Fix FD leak on TCP connection failure, handle TCP worker creation failure
• #4764: Prevent race while creating new TCP worker threads

1.1.0-beta1

Released September 1st 2016

Changes since 1.0.0:

New features

• #3762 Teeaction: send copy of query to second nameserver, sponge responses
• #3876 Add showResponseRules(), {mv,rm,top}ResponseRule()
• #3936 Filter on opcode, records count/type, trailing data
• #3975 Make dnsdist {A,I}XFR aware, document possible issues
• #4006 Add eBPF source address and qname/qtype filtering
• #4008 Node infrastructure for querying recent traffic
• #4042 Add server-side TCP Fast Open support
• #4050 Add clearRules() and setRules()
• #4114 Add QNameLabelsCountRule() and QNameWireLengthRule()
• #4116 Added src boolean to NetmaskGroupRule to match destination address (Reinier Schoof)
• #4175 Implemented query counting (Reinier Schoof)
• #4244 Add a setCD parameter to set cd=1 on health check queries
• #4284 Add RCodeRule(), Allow, Delay and Drop response actions
• #4305 Add an optional Lua callback for altering a Protobuf message
• #4309 Add showTCPStats function (RobinGeuze)
• #4329 Add options to LogAction() so it can append (instead of truncate) (Duane Wessels)

Improvements

• #3714 Add documentation links to dnsdist.service (Ruben Kerkhof)
• #3754 Allow the use of custom headers in the web server
• #3826 Implement a ‘quiet’ mode for SuffixMatchNodeRule()
• #3836 Log the content of webserver’s exceptions
• #3858 Only log YaHTTP’s parser exceptions in verbose mode
• #3877 Increase max FDs in systemd unit, warn if clearly too low
• #4019 Add an optional addECS option to TeeAction()
• #4029 Add version and feature information to version output
• #4079 Return an error on RemoteLog{,Response}Action() w/o protobuf
• #4246 API now sends pools as a JSON array instead of a string
• #4302 Add help() and showVersion()
• #4286 Add response rules to the API and Web status page
• #4068 Display the dyn eBPF filters stats in the web interface

Bug fixes

• #3755 Fix RegexRule example in dnsdistconf.lua
• #3773 Stop copying the HTTP request headers to the response
• #3837 Remove dnsdist service file on trusty
• #3840 Catch WrongTypeException in client mode
• #3906 Keep the servers ordered inside pools
• #3988 Fix grepq() output in the README
• #3992 Fix some typos in the AXFR/IXFR documentation
• #3995 Fix comparison between signed and unsigned integer
• #4049 Fix dnsdist rpm building script #4048 (Daniel Stirnimann)
• #4065 Include editline/readline.h instead of readline.h/history.h
• #4067 Disable eBPF support when BPF_FUNC_tail_call is not found
• #4069 Fix a buffer overflow when displaying an OpcodeRule
• #4101 Fix $ expansion in build-dnsdist-rpm
• #4198 newServer setting maxCheckFailures makes no sense (stutiredboy)
• #4205 Prevent the use of “any” addresses for downstream server
• #4220 Don’t log an error when parsing an invalid UDP query
• #4348 Fix invalid outstanding count for {A,I}XFR over TCP
• #4365 Reset origFD asap to keep the outstanding count correct
• #4375 Tuple requires make_tuple to initialize
• #4380 Fix compilation with clang when eBPF support is enabled

1.0.0

Released April 21st 2016

Changes since 1.0.0-beta1:

Improvements

• #3700 Create user from the RPM package to drop privs
• #3712 Make check should run testrunner
• #3713 Remove contrib/dnsdist.service (Ruben Kerkhof)
• #3722 Use LT_INIT and disable static objects (Ruben Kerkhof)
• #3724 Include PDNS_CHECK_OS in configure (Chris Hofstaedtler)
• #3728 Document libedit Ctrl-R workaround for CentOS 6
• #3730 Make topBandwidth() behave like other top* functions
• #3731 Clarify a bit the documentation of load-balancing policies

Bug fixes

• #3711 Building rpm needs systemd headers (Ruben Kerkhof)
• #3736 Add missing Lua binding for NetmaskGroupRule()
• #3739 Drop privileges after daemonizing and writing our pid

1.0.0-beta1

Released April 14th 2016

Changes since 1.0.0-alpha2:

New features

• Per-pool packet cache
• Some actions do not stop the processing anymore when they match, allowing more complex setups: Delay, Disable Validation, Log, MacAddr, No Recurse and of course None
• The new RE2Rule() is available, using the RE2 regular expression library to match queries, in addition to the existing POSIX-based RegexRule()
• SpoofAction() now supports multiple A and AAAA records
• Remote logging of questions and answers via Protocol Buffer

Improvements

• #3405 Add health check logging, maxCheckFailures to backend
• #3412 Check config
• #3440 Client operation improvements
• #3466 Add dq binding for skipping packet cache in LuaAction (Jan Broer)
• #3499 Add support for multiple carbon servers
• #3504 Allow accessing the API with an optional API key
• #3556 Add an option to limit the number of queued TCP connections
• #3578 Add a disable-syslog option
• #3608 Export cache stats to carbon
• #3622 Display the ACL content on startup
• #3627 Remove ECS option from response’s OPT RR when necessary
• #3633 Count “TTL too short” cache events
• #3677 systemd-notify support

Bug fixes

• #3388 Lock the Lua context before executing a LuaAction
• #3433 Check that the answer matches the initial query
• #3461 Fix crash when calling rmServer() with an invalid index
• #3550,#3551 Fix build failure on FreeBSD (Ruben Kerkhof)
• #3594 Prevent EOF error for empty console response w/o sodium
• #3634 Prevent dangling TCP fd in case setupTCPDownstream() fails
• #3641 Under threshold, QPS action should return None, not Allow
• #3658 Fix a race condition in MaxQPSIPRule

1.0.0-alpha2

Released February 5th 2016

Changes since 1.0.0-alpha1:

New features

• Lua functions now receive a DNSQuestion dq object instead of several parameters. This adds a greater compatibility with PowerDNS and allows adding more parameters without breaking the API (#3198)
• Added a source option to newServer() to specify the local address or interface used to contact a downstream server (#3138)
• CNAME and IPv6-only support have been added to spoofed responses (#3064)
• grepq() can be used to search for slow queries, along with topSlow()
• New Lua functions: addDomainCNAMESpoof(), AllowAction() by @bearggg, exceedQRate(), MacAddrAction(), makeRule(), NotRule(), OrRule(), QClassRule(), RCodeAction(), SpoofCNAMEAction(), SuffixMatchNodeRule(), TCPRule(), topSlow()
• NetmaskGroup support have been added in Lua (#3144)
• Added MacAddrAction() to add the source MAC address to the forwarded query (#3313)

Bug fixes

• An issue in DelayPipe could make dnsdist crash at startup
• downstream-timeouts metric was not always updated
• truncateTC was unproperly updating the response length (#3126)
• DNSCrypt responses larger than queries were unproperly truncated
• An issue prevented info message from being displayed in non-verbose mode, fixed by Jan Broer
• Reinstating an expired Dynamic Rule was not correctly logged (#3323)
• Initialized counters in the TCP client thread might have cause FD and memory leak, reported by Martin Pels (#3300)
• We now drop queries containing no question (qdcount == 0) (#3290)
• Outstanding TCP queries count was not always correct (#3288)
• A locking issue in exceedRespGen() might have caused crashs (#3277)
• Useless sockets were created in client mode (#3257)
• addAnyTCRule() was generating TC=1 responses even over TCP (#3251)

Web interface

• Cleanup of the HTML by Sander Hoentjen
• Fixed an XSS reported by @janeczku (#3217)
• Removed remote images
• Set the charset to UTF-8, added some security-related and CORS HTTP headers
• Added server latency by Jan Broer (#3201)
• Switched to official minified versions of JS scripts, by Sander Hoentjen (#3317)
• Don’t log unauthenticated HTTP request as an authentication failure

Various documentation updates and minor cleanups:

• Added documentation for Advanced DNS Protection features (Dynamic rules, maintenance())
• Make topBandwidth() default to the top 10 clients
• Replaced readline with libedit
• Added GPL2 License (#3200)
• Added incbin License (#3269)
• Updated completion rules
• Removed wrong option --daemon-no by Stefan Schmidt

1.0.0-alpha1

Released December 24th 2015

Initial release