Avahi 0.8, the 'Dobro Jutro' release

The Avahi 0.8 release brings a number of new features and bug fix changes
including a backward-compatible addition to the D-Bus API and the avahi-core
API.

The existing API is still fully supported however clients using the new
API will not work with older Avahi releases. The avahi-client library is not
affected. See the "API Changes" section for further details.

New Features:

• New options for filtering reflected queries between networks (reflect-filter)
• New mainloop integration for Qt5 and libevent
• docs/THREADS: Information for multi-threaded avahi-client apps
• Listen on loopback interfaces by default, allowing local-only services to be
  consumed by the local machine
• New D-Bus V2 API and additions to the avahi-core API for splitting "New"
  calls into "Prepare" and "Start". See "API Changes" for more details.

Notable Changes:

• avahi-autoipd: Initial IP selection based on MAC previously ignored first
  octet - this will cause all hosts to select a different link-local IP than
  previous versions based on the same MAC address
• avahi-daemon: Delay sending results on an object for 10ms in an attempt to
  give clients enough time to subscribe to signals from the new object after
  receiving it's path in response so the New call. See "API Changes" for more
  info

Bug Fixes:

• avahi-python: Various Python 3 enhancements including encoding unicode
  strings as UTF-8
• avahi-common: avahi_string_list_to_string will now escape embedded quotes,
  backslashes and control characters.
• avahi-daemon: Fix a crash when txt records have an empty value in .xml
  service files
• avahi-daemon: reflector: do not incorrectly cache responses on outgoing
  interfaces. Previously we would incorrectly cache responses reflected from
  one interface on the outgoing interface. These responses were later sent to
  clients on that network even if the original client had disappeared and could
  cause those clients to have a hostname conflict with themselves on restart.
  We no longer incorrectly cache such traffic.

Security Fixes:

• Drop legacy unicast queries from address not on local link which can lead to
  UDP traffic amplification attacks (CVE-2017-6519)

API Changes: The avahi-core API and D-Bus API have implemented a new API where
a call to the "New" method can now be split into a "Prepare" and then "Start"
method for some objects. The previous "New" API is still fully supported and
there is no intention to deprecate it.

This change affects the the following objects: AsyncAddressResolver,
AsyncHostNameResolver, AsyncServiceResolver, DomainBrowser, RecordBrowser,
ServiceBrowser, ServiceTypeBrowser

This is because the D-Bus implementation in some languages would only bind to
signals of an object after it was created and had received the new object's
path. This led to such languages missing the initial results sent between the
time the object was created and it had setup a filter to receive it's signals.
This primarily occured in languages that create dynamic bindings for D-Bus
objects using introspection such as Python. The avahi-client C api was not
affected as it globally binds to all avahi signals without specifying
individual object paths and still makes use of the V1 API.

The v2 Prepare/Start API is available under the new
org.freedesktop.Avahi.Server2 D-Bus interface and also has corresponding
avahi_s_* calls for users of the embedded avahi-core library.

The old org.freedesktop.Avahi.Server interface is still supported and there is
no intention to remove this API. Additionally this problem has also been solved
for old clients by adding a very small 10ms delay before we start sending
results to give the client time to bind to the signals which should silently
fix the issue in most cases without introducing a noticable or impactful delay.

Clients implementing the new org.freedesktop.Avahi.Server2 D-Bus interface will
not work with older Avahi daemons. It is suggested that clients may wish to
either check for and fallback to the older API version, or continue to use the
OLD API and rely on the 10ms timer to resolve the issue.

Big thank-you to everyone contributing to the project through issues & pull
requests, including the the following people who contributed changes to this
release: Daniel S, David Kerr, Eric Bischoff, James Rudd, Jan Alexander
Steffens (heftig), Karl Cronburg, Krzesimir Nowak, Mario Blättermann, Martin
Blanchard, Michal Sekletar, msk-nightingale, Philip Prindeville, Piotr Drąg,
Rafael Fontenelle, scootergrisen, Simon Lauser, Simon McVittie, Thomas Jollans,
Till Kamppeter, Tony Garnock-Jones, Trent Lloyd, wisd0me, Yclept Nemo, Zlopez,
Дамјан Георгиевски.

This release is backwards compatible with Avahi 0.6.x and 0.7.

v0.7

Avahi 0.7, the 'Adieu' release

The Avahi 0.7 release brings two new features, binary TXT records in XML
service files and the ability to start the gobject client in a custom context.

A number of other changes are detailed below.

New Features:

• Add support for binary values in TXT records in XML service files by
  specifying value-format="text|binary-hex|binary-base64". If not specified,
  defaults to the normal value of "text" (thus backwards compatible)
• avahi-gobject: Allow starting the client in a custom GMainContext by
  passing context to ga_client_start_in_context instead of ga_client_start
  (avahi-gobject minor version has been incremented)

Thanks to Krzesimir Nowak for both of these additions.

Notable Changes:

• avahi-daemon: Remove all default rlimits from avahi-daemon.conf, as two
  main problems happened with firstly rlimit-nproc causing avahi to fail when
  started in a container without user namespaces and secondly because memory
  rlimits were causing avahi to crash in some cases. Leave it up to the init
  system to impose any modified limits instead. It is recommend to ship this
  change in distribution default config files.
• avahi-common: Fix watch cleanup issue in watch_free
• avahi-discover (python): Updated for Python3 & GTK3
• avahi-autoipd: clear previously set address before binding a new one
• avahi-autoipd: fix dhclient hooks to check for avahi-autoipd before running
• build: Move default rundir from /var/run to /run as per modern system setups

Other Changes:

• build: Fix the printed value of "Building libavahi-client" in ./configure
• build: autogen.sh improved to work when called from another directory
• build: Fix warnings when compiling against musl libc
• Updated translations: Polish, Ukranian, Turkish, Indonesian, Swedish,
  Hungarian, Occitan (New), Czech, Chinese (Simplified)
• avahi-compat-libdns_sd: Fix incorrect URL in warnings
• service-type-database: Add new service Types: _ipps._tcp, _xpra._tcp
• avahi-dnsconfd: Update manpage with the correct action script name
• avahi-gobject: Use the correct shared library name in AvahiCore-0.6.gir
• avahi-gobject: Fix build failing under some locales
• avahi-common/dbus-watch-glue.c: remove Unneeded semicolon
• Update gentoo init scripts for newer openrc version

Big thank-you to everyone contributing to the project through issues & pull
requests, including the the following people who contributed changes to this
release: Andika Triwidada, Andreas Henriksson, Anthony G. Basile,
Antoine Martin, Ben Chan, Cedric Hombourger, Cedric Valmary, Gabor Kelemen,
HMikolon, Jan Alexander, Steffens (heftig), Josef Andersson, Jussi Kukkonen,
Krzesimir Nowak, Kylie McClain, Michael Biebl, Muhammet Kara, Peter Meerwald,
Philip Withnall, Piotr Drąg, Sebastiaan Lokhorst, Thomas Kluyver, Trent Lloyd

This release is otherwise backwards compatible with Avahi 0.6.x except for
ga_client_start_in_context (new function, incremented avahi-goject SO minor
version) and value-format in XML service files.

v0.6.32

This is largely a bugfix release, non-bug changes are listed separately.

• Don't log warnings about invalid packets, commonly triggered by Windows 10 systems
• Fix issue with bad packet size estimation, causing probes to continuously be sent when hosting large numbers of services (Lee, Chun-Yi)
• Fix build on Solaris/SmartOS (filio.h issue)
• Fix build on FreeBSD (PCAP_D_IN issue)
• Fix debug output with libdaemon >= 0.14
• avahi_server_set_browse_domains now correctly uses the provided list, instead of re-using the list from the configuration file
• Set nl_pid to 0, this will automatically assign the value and prevent conflicts per netlink(7). (Bug #334)
• Check for netlink pid=0 (kernel) instead of uid=0, which works correctly with network & user namespaces.
• Fix reversed IFA_LOCAL and IFA_ADDRESS checks. (#355)
• Don't fail the build on deprecated GTK/GLIB usage
• Gracefully fail if SO_REUSEPORT is not available
• Minor Python 3 update for the python ServiceTypeDatabase test usage of print, should be backwards compatible
• avahi-autoipd: Fix incorrect usage of IFLA_RTA instead of IFA_RTA which could crash on ARM (Closes: #42)

Changes

• GTK3 deprecation fixes including vbox, g_object_unref on GdkCursor, stock items, composite API
• New feature: host-name-from-machine-id= to configure the hostname from the machine-id, defaults to off.
• Configuration change: Enable IPv6 by default (use-ipv6=yes)
• Configuration change: Disable publishing HINFO and WORKSTATION records in the default config (publish-hinfo=no, publish-workstation=no)
• Configuration change: Don't browse 0pointer.de and zeroconf.org wide-area by default (browse-domain=)

This release is backwards compatible with Avahi 0.6.x with x < 32.

0.6.32-rc

This is largely a bugfix release, non-bug changes are listed separately.

• Don't log warnings about invalid packets, commonly triggered by Windows 10 systems
• Fix issue with bad packet size estimation, causing probes to continuously be sent when hosting large numbers of services (Lee, Chun-Yi)
• Fix build on Solaris/SmartOS (filio.h issue)
• Fix build on FreeBSD (PCAP_D_IN issue)
• Fix debug output with libdaemon >= 0.14
• avahi_server_set_browse_domains now correctly uses the provided list, instead of re-using the list from the configuration file
• Set nl_pid to 0, this will automatically assign the value and prevent conflicts per netlink(7). (Bug #334)
• Check for netlink pid=0 (kernel) instead of uid=0, which works correctly with network & user namespaces.
• Fix reversed IFA_LOCAL and IFA_ADDRESS checks. (#355)
• Don't fail the build on deprecated GTK/GLIB usage
• Gracefully fail if SO_REUSEPORT is not available
• Minor Python 3 update for the python ServiceTypeDatabase test usage of print, should be backwards compatible

Changes

• GTK3 deprecation fixes including vbox, g_object_unref on GdkCursor, stock items, composite API
• New feature: host-name-from-machine-id= to configure the hostname from the machine-id, defaults to off.
• Configuration change: Enable IPv6 by default (use-ipv6=yes)
• Configuration change: Disable publishing HINFO and WORKSTATION records in the default config (publish-hinfo=no, publish-workstation=no)
• Configuration change: Don't browse 0pointer.de and zeroconf.org wide-area by default (browse-domain=)

This release is backwards compatible with Avahi 0.6.x with x < 32.