--- embedaddon/dnsmasq/CHANGELOG 2013/07/29 19:37:40 1.1
+++ embedaddon/dnsmasq/CHANGELOG 2014/06/15 16:31:38 1.1.1.2
@@ -1,3 +1,358 @@
+version 2.71
+ Subtle change to error handling to help DNSSEC validation
+ when servers fail to provide NODATA answers for
+ non-existent DS records.
+
+ Tweak code which removes DNSSEC records from answers when
+ not required. Fixes broken answers when additional section
+ has real records in it. Thanks to Marco Davids for the bug
+ report.
+
+ Fix DNSSEC validation of ANY queries. Thanks to Marco Davids
+ for spotting that too.
+
+ Fix total DNS failure and 100% CPU use if cachesize set to zero,
+ regression introduced in 2.69. Thanks to James Hunt and
+ the Ubuntu crowd for assistance in fixing this.
+
+
+version 2.70
+ Fix crash, introduced in 2.69, on TCP request when dnsmasq
+ compiled with DNSSEC support, but running without DNSSEC
+ enabled. Thanks to Manish Sing for spotting that one.
+
+ Fix regression which broke ipset functionality. Thanks to
+ Wang Jian for the bug report.
+
+
+version 2.69
+ Implement dynamic interface discovery on *BSD. This allows
+ the contructor: syntax to be used in dhcp-range for DHCPv6
+ on the BSD platform. Thanks to Matthias Andree for
+ valuable research on how to implement this.
+
+ Fix infinite loop associated with some --bogus-nxdomain
+ configs. Thanks fogobogo for the bug report.
+
+ Fix missing RA RDNS option with configuration like
+ --dhcp-option=option6:23,[::] Thanks to Tsachi Kimeldorfer
+ for spotting the problem.
+
+ Add [fd00::] and [fe80::] as special addresses in DHCPv6
+ options, analogous to [::]. [fd00::] is replaced with the
+ actual ULA of the interface on the machine running
+ dnsmasq, [fe80::] with the link-local address.
+ Thanks to Tsachi Kimeldorfer for championing this.
+
+ DNSSEC validation and caching. Dnsmasq needs to be
+ compiled with this enabled, with
+
+ make dnsmasq COPTS=-DHAVE_DNSSEC
+
+ this add dependencies on the nettle crypto library and the
+ gmp maths library. It's possible to have these linked
+ statically with
+
+ make dnsmasq COPTS='-DHAVE_DNSSEC -DHAVE_DNSSEC_STATIC'
+
+ which bloats the dnsmasq binary, but saves the size of
+ the shared libraries which are much bigger.
+
+ To enable, DNSSEC, you will need a set of
+ trust-anchors. Now that the TLDs are signed, this can be
+ the keys for the root zone, and for convenience they are
+ included in trust-anchors.conf in the dnsmasq
+ distribution. You should of course check that these are
+ legitimate and up-to-date. So, adding
+
+ conf-file=/path/to/trust-anchors.conf
+ dnssec
+
+ to your config is all thats needed to get things
+ working. The upstream nameservers have to be DNSSEC-capable
+ too, of course. Many ISP nameservers aren't, but the
+ Google public nameservers (8.8.8.8 and 8.8.4.4) are.
+ When DNSSEC is configured, dnsmasq validates any queries
+ for domains which are signed. Query results which are
+ bogus are replaced with SERVFAIL replies, and results
+ which are correctly signed have the AD bit set. In
+ addition, and just as importantly, dnsmasq supplies
+ correct DNSSEC information to clients which are doing
+ their own validation, and caches DNSKEY, DS and RRSIG
+ records, which significantly improve the performance of
+ downstream validators. Setting --log-queries will show
+ DNSSEC in action.
+
+ If a domain is returned from an upstream nameserver without
+ DNSSEC signature, dnsmasq by default trusts this. This
+ means that for unsigned zone (still the majority) there
+ is effectively no cost for having DNSSEC enabled. Of course
+ this allows an attacker to replace a signed record with a
+ false unsigned record. This is addressed by the
+ --dnssec-check-unsigned flag, which instructs dnsmasq
+ to prove that an unsigned record is legitimate, by finding
+ a secure proof that the zone containing the record is not
+ signed. Doing this has costs (typically one or two extra
+ upstream queries). It also has a nasty failure mode if
+ dnsmasq's upstream nameservers are not DNSSEC capable.
+ Without --dnssec-check-unsigned using such an upstream
+ server will simply result in not queries being validated;
+ with --dnssec-check-unsigned enabled and a
+ DNSSEC-ignorant upstream server, _all_ queries will fail.
+
+ Note that DNSSEC requires that the local time is valid and
+ accurate, if not then DNSSEC validation will fail. NTP
+ should be running. This presents a problem for routers
+ without a battery-backed clock. To set the time needs NTP
+ to do DNS lookups, but lookups will fail until NTP has run.
+ To address this, there's a flag, --dnssec-no-timecheck
+ which disables the time checks (only) in DNSSEC. When dnsmasq
+ is started and the clock is not synced, this flag should
+ be used. As soon as the clock is synced, SIGHUP dnsmasq.
+ The SIGHUP clears the cache of partially-validated data and
+ resets the no-timecheck flag, so that all DNSSEC checks
+ henceforward will be complete.
+
+ The development of DNSSEC in dnsmasq was started by
+ Giovanni Bajo, to whom huge thanks are owed. It has been
+ supported by Comcast, whose techfund grant has allowed for
+ an invaluable period of full-time work to get it to
+ a workable state.
+
+ Add --rev-server. Thanks to Dave Taht for suggesting this.
+
+ Add --servers-file. Allows dynamic update of upstream servers
+ full access to configuration.
+
+ Add --local-service. Accept DNS queries only from hosts
+ whose address is on a local subnet, ie a subnet for which
+ an interface exists on the server. This option
+ only has effect if there are no --interface --except-interface,
+ --listen-address or --auth-server options. It is intended
+ to be set as a default on installation, to allow
+ unconfigured installations to be useful but also safe from
+ being used for DNS amplification attacks.
+
+ Fix crashes in cache_get_cname_target() when dangling CNAMEs
+ encountered. Thanks to Andy and the rt-n56u project for
+ find this and helping to chase it down.
+
+ Fix wrong RCODE in authoritative DNS replies to PTR queries. The
+ correct answer was included, but the RCODE was set to NXDOMAIN.
+ Thanks to Craig McQueen for spotting this.
+
+ Make statistics available as DNS queries in the .bind TLD as
+ well as logging them.
+
+
+version 2.68
+ Use random addresses for DHCPv6 temporary address
+ allocations, instead of algorithmically determined stable
+ addresses.
+
+ Fix bug which meant that the DHCPv6 DUID was not available
+ in DHCP script runs during the lifetime of the dnsmasq
+ process which created the DUID de-novo. Once the DUID was
+ created and stored in the lease file and dnsmasq
+ restarted, this bug disappeared.
+
+ Fix bug introduced in 2.67 which could result in erroneous
+ NXDOMAIN returns to CNAME queries.
+
+ Fix build failures on MacOS X and openBSD.
+
+ Allow subnet specifications in --auth-zone to be interface
+ names as well as address literals. This makes it possible
+ to configure authoritative DNS when local address ranges
+ are dynamic and works much better than the previous
+ work-around which exempted contructed DHCP ranges from the
+ IP address filtering. As a consequence, that work-around
+ is removed. Under certain circumstances, this change wil
+ break existing configuration: if you're relying on the
+ contructed-range exception, you need to change --auth-zone
+ to specify the same interface as is used to construct your
+ DHCP ranges, probably with a trailing "/6" like this:
+ --auth-zone=example.com,eth0/6 to limit the addresses to
+ IPv6 addresses of eth0.
+
+ Fix problems when advertising deleted IPv6 prefixes. If
+ the prefix is deleted (rather than replaced), it doesn't
+ get advertised with zero preferred time. Thanks to Tsachi
+ for the bug report.
+
+ Fix segfault with some locally configured CNAMEs. Thanks
+ to Andrew Childs for spotting the problem.
+
+ Fix memory leak on re-reading /etc/hosts and friends,
+ introduced in 2.67.
+
+ Check the arrival interface of incoming DNS and TFTP
+ requests via IPv6, even in --bind-interfaces mode. This
+ isn't possible for IPv4 and can generate scary warnings,
+ but as it's always possible for IPv6 (the API always
+ exists) then we should do it always.
+
+ Tweak the rules on prefix-lengths in --dhcp-range for
+ IPv6. The new rule is that the specified prefix length
+ must be larger than or equal to the prefix length of the
+ corresponding address on the local interface.
+
+
+version 2.67
+ Fix crash if upstream server returns SERVFAIL when
+ --conntrack in use. Thanks to Giacomo Tazzari for finding
+ this and supplying the patch.
+
+ Repair regression in 2.64. That release stopped sending
+ lease-time information in the reply to DHCPINFORM
+ requests, on the correct grounds that it was a standards
+ violation. However, this broke the dnsmasq-specific
+ dhcp_lease_time utility. Now, DHCPINFORM returns
+ lease-time only if it's specifically requested
+ (maintaining standards) and the dhcp_lease_time utility
+ has been taught to ask for it (restoring functionality).
+
+ Fix --dhcp-match, --dhcp-vendorclass and --dhcp-userclass
+ to work with BOOTP and well as DHCP. Thanks to Peter
+ Korsgaard for spotting the problem.
+
+ Add --synth-domain. Thanks to Vishvananda Ishaya for
+ suggesting this.
+
+ Fix failure to compile ipset.c if old kernel headers are
+ in use. Thanks to Eugene Rudoy for pointing this out.
+
+ Handle IPv4 interface-address labels in Linux. These are
+ often used to emulate the old IP-alias addresses. Before,
+ using --interface=eth0 would service all the addresses of
+ eth0, including ones configured as aliases, which appear
+ in ifconfig as eth0:0. Now, only addresses with the label
+ eth0 are active. This is not backwards compatible: if you
+ want to continue to bind the aliases too, you need to add
+ eg. --interface=eth0:0 to the config.
+
+ Fix "failed to set SO_BINDTODEVICE on DHCP socket: Socket
+ operation on non-socket" error on startup with
+ configurations which have exactly one --interface option
+ and do RA but _not_ DHCPv6. Thanks to Trever Adams for the
+ bug report.
+
+ Generalise --interface-name to cope with IPv6 addresses
+ and multiple addresses per interface per address family.
+
+ Fix option parsing for --dhcp-host, which was generating a
+ spurious error when all seven possible items were
+ included. Thanks to Zhiqiang Wang for the bug report.
+
+ Remove restriction on prefix-length in --auth-zone. Thanks
+ to Toke Hoiland-Jorgensen for suggesting this.
+
+ Log when the maximum number of concurrent DNS queries is
+ reached. Thanks to Marcelo Salhab Brogliato for the patch.
+
+ If wildcards are used in --interface, don't assume that
+ there will only ever be one available interface for DHCP
+ just because there is one at start-up. More may appear, so
+ we can't use SO_BINDTODEVICE. Thanks to Natrio for the bug
+ report.
+
+ Increase timeout/number of retries in TFTP to accomodate
+ AudioCodes Voice Gateways doing streaming writes to flash.
+ Thanks to Damian Kaczkowski for spotting the problem.
+
+ Fix crash with empty DHCP string options when adding zero
+ terminator. Thanks to Patrick McLean for the bug report.
+
+ Allow hostnames to start with a number, as allowed in
+ RFC-1123. Thanks to Kyle Mestery for the patch.
+
+ Fixes to DHCP FQDN option handling: don't terminate FQDN
+ if domain not known and allow a FQDN option with blank
+ name to request that a FQDN option is returned in the
+ reply. Thanks to Roy Marples for the patch.
+
+ Make --clear-on-reload apply to setting upstream servers
+ via DBus too.
+
+ When the address which triggered the construction of an
+ advertised IPv6 prefix disappears, continue to advertise
+ the prefix for up to 2 hours, with the preferred lifetime
+ set to zero. This satisfies RFC 6204 4.3 L-13 and makes
+ things work better if a prefix disappears without being
+ deprecated first. Thanks to Uwe Schindler for persuasively
+ arguing for this.
+
+ Fix MAC address enumeration on *BSD. Thanks to Brad Smith
+ for the bug report.
+
+ Support RFC-4242 information-refresh-time options in the
+ reply to DHCPv6 information-request. The lease time of the
+ smallest valid dhcp-range is sent. Thanks to Uwe Schindler
+ for suggesting this.
+
+ Make --listen-address higher priority than --except-interface
+ in all circumstances. Thanks to Thomas Hood for the bugreport.
+
+ Provide independent control over which interfaces get TFTP
+ service. If enable-tftp is given a list of interfaces, then TFTP
+ is provided on those. Without the list, the previous behaviour
+ (provide TFTP to the same interfaces we provide DHCP to)
+ is retained. Thanks to Lonnie Abelbeck for the suggestion.
+
+ Add --dhcp-relay config option. Many thanks to vtsl.net
+ for sponsoring this development.
+
+ Fix crash with empty tag: in --dhcp-range. Thanks to
+ Kaspar Schleiser for the bug report.
+
+ Add "baseline" and "bloatcheck" makefile targets, for
+ revealing size changes during development. Thanks to
+ Vladislav Grishenko for the patch.
+
+ Cope with DHCPv6 clients which send REQUESTs without
+ address options - treat them as SOLICIT with rapid commit.
+
+ Support identification of clients by MAC address in
+ DHCPv6. When using a relay, the relay must support RFC
+ 6939 for this to work. It always works for directly
+ connected clients. Thanks to Vladislav Grishenko
+ for prompting this feature.
+
+ Remove the rule for constructed DHCP ranges that the local
+ address must be either the first or last address in the
+ range. This was originally to avoid SLAAC addresses, but
+ we now explicitly autoconfig and privacy addresses instead.
+
+ Update Polish translation. Thanks to Jan Psota.
+
+ Fix problem in DHCPv6 vendorclass/userclass matching
+ code. Thanks to Tanguy Bouzeloc for the patch.
+
+ Update Spanish transalation. Thanks to Vicente Soriano.
+
+ Add --ra-param option. Thanks to Vladislav Grishenko for
+ inspiration on this.
+
+ Add --add-subnet configuration, to tell upstream DNS
+ servers where the original client is. Thanks to DNSthingy
+ for sponsoring this feature.
+
+ Add --quiet-dhcp, --quiet-dhcp6 and --quiet-ra. Thanks to
+ Kevin Darbyshire-Bryant for the initial patch.
+
+ Allow A/AAAA records created by --interface-name to be the
+ target of --cname. Thanks to Hadmut Danisch for the
+ suggestion.
+
+ Avoid treating a --dhcp-host which has an IPv6 address
+ as eligable for use with DHCPv4 on the grounds that it has
+ no address, and vice-versa. Thanks to Yury Konovalov for
+ spotting the problem.
+
+ Do a better job caching dangling CNAMEs. Thanks to Yves
+ Dorfsman for spotting the problem.
+
+
version 2.66
Add the ability to act as an authoritative DNS
server. Dnsmasq can now answer queries from the wider 'net