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-Changes in version 0.2.7.1-alpha - 2015-0?-??
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+Changes in version 0.2.7.1-alpha - 2015-05-??
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+ Tor 0.2.7.1-alpha is the first alpha release in its series.
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+
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+ o Major features (controller):
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+ - Add the ADD_ONION and DEL_ONION commands that allows the creation
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+ and management of hidden services via the controller. Closes
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+ ticket 6411.
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+ - New "GETINFO onions/current" and "GETINFO onions/detached" to get
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+ information about hidden services created via the controller.
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+ Part of ticket 6411.
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+ - New HSFETCH command to launch a request for a hidden service descriptor.
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+ Closes ticket 14847.
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+
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+ o Major bugfixes (hidden services):
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+ - Revert commit that made directory authority assign the HSDir flag to
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+ relay without a DirPort which is bad because relay can't handle
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+ BEGIN_DIR cells. Fixes bug 15850; bugfix on tor-0.2.6.3-alpha.
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+
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+ o Minor features (HS popularity countermeasure):
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+ - To avoid leaking HS popularity, don't cycle the introduction point
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+ when we've handled a fixed number of INTRODUCE2 cells but instead
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+ cycle it when a random value of introductions is reached thus making
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+ it more difficult for an attacker to find out the amount of clients
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+ that has passed through the introduction point for a specific HS.
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+ Closes ticket 15745.
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+
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+ o Minor features (command-line interface):
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+ - Make --hash-password imply --hush to prevent unnecessary noise. Closes
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+ ticket 15542.
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+
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+ o Minor features (controller)
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+ - Controllers can now use GETINFO hs/client/desc/id/... to
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+ retrieve items from the client's hidden service descriptor
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+ cache. Closes ticket 14845.
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+
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+ o Minor features (DoS-resistance):
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+ - Make it harder for attackers to overwhelm hidden services with
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+ introductions, by blocking multiple introduction requests on the
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+ same circuit. Resolves ticket 15515.
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+
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+ o Minor features (logging):
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+ - Include the Tor version in all LD_BUG log messages, since people
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+ tend to cut and paste those into the bugtracker. Implements
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+ ticket 15026.
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+
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+ o Minor features (pluggable transports):
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+ - When launching managed pluggable transports, setup a valid open stdin
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+ in the child process that can be used to detect if tor has terminated.
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+ The "TOR_PT_EXIT_ON_STDIN_CLOSE" enviornment variable can be used by
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+ implementations to detect this new behavior. Resolves ticket 15435.
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+ - When launching managed pluggable transports on linux systems,
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+ attempt to have the kernel deliver a SIGTERM on tor exit if
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+ the pluggable transport process is still running. Resolves
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+ ticket 15471.
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+
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+
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+ o Minor features (testing):
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+ - Add make rule `check-changes` to verify the format of changes files.
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+ Closes ticket 15180.
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+ - Add unit tests for control_event_is_interesting().
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+ Add a compile-time check that the number of events doesn't exceed
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+ the capacity of control_event_t.event_mask.
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+ Closes ticket 15431, checks for bugs similar to 13085.
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+ Patch by "teor".
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+ - Commandline argument tests moved to Stem. Resolves ticket 14806.
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+ - Integrate the ntor, backtrace and zero lengths keys tests into the
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+ automake test suite. Closes ticket 15344.
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+ - Remove assertions during builds to determine Tor's test coverage.
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+ We don't want to trigger these even in assertions, so including
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+ them artificially makes our branch coverage look worse than it is.
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+ This patch provides the new test-stem-full and coverage-html-full
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+ configure options. Implements ticket 15400.
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+ - Add a test to verify that the compiler does not eliminate our
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+ memwipe() implementation. Closes ticket 15377.
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+
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+ o Minor features (controller):
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+ - Add DirAuthority lines for default directory authorities to output
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+ of the GETINFO config/defaults controller command if not already
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+ present. Implements ticket 14840.
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+ - Implement a new controller command "status/fresh-relay-descs" to
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+ fetch a descriptor/extrainfo pair that was generated on demand
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+ just for the controller's use. Implements ticket 14784.
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+
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+ o Minor features (command-line interface):
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+ - Print a warning whenever we find a relative
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+ file path being used as torrc option. Resolves issue 14018.
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+ - The "--hash-password" option now implies "--hush" to avoid needless
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+ noise. Closes ticket 15542. Patch from "cypherpunks".
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+
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+ o Minor features (clock-jump tolerance):
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+ - Recover better when our clock jumps back many hours, like might
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+ happen for Tails or Whonix users who start with a very wrong
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+ hardware clock, use Tor to discover a more accurate time, and then
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+ fix their clock. Resolves part of ticket 8766.
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+ [I'd call this a major feature if it actually fixed all of the issues.]
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+
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+ o Minor features (geoip):
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+ - Update geoip to the April 8 2015 Maxmind GeoLite2 Country database.
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+ - Update geoip6 to the April 8 2015 Maxmind GeoLite2 Country database.
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+
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+ o Minor bugfixes (statistics):
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+ - Disregard the ConnDirectionStatistics torrc options when Tor is
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+ not a relay since in that mode of operation no sensible data is
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+ being collected and because Tor might run into measurement hiccups
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+ when running as a client for some time, then becoming a relay. Fixes
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+ bug 15604; bugfix on 0.2.2.35.
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+
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+ o Minor bugfixes (build):
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+ - Improve out-of-tree builds by making non-standard rules work and clean up
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+ additional files and directories. Fixes bug 15053; bugfix on
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+ 0.2.7.0-alpha.
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+
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+ o Minor bugfixes (command-line interface):
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+ - When "--quiet" is provided along with "--validate-config", do not
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+ write anything to stdout on success. Fixes bug 14994; bugfix on
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+ 0.2.3.3-alpha.
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+ - When complaining about bad arguments to "--dump-config", use
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+ stderr, not stdout.
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+
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+ o Minor bugfixes (configuration, unit tests):
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+ - Only add the default fallback directories when the DirAuthorities,
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+ AlternateDirAuthority, and FallbackDir directory config options
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+ are set to their defaults.
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+ The default fallback directory list is currently empty, this fix
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+ will only change tor's behaviour when it has default fallback
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+ directories.
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+ Includes unit tests for consider_adding_dir_servers().
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+ Fixes bug 15642; bugfix on 90f6071d8dc0 in 0.2.4.7-alpha.
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+ Patch by "teor".
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+
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+ o Minor bugfixes (hidden service):
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+ - Remove an extraneous newline character from the end of hidden
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+ service descriptors. Fixes bug 15296; bugfix on 0.2.0.10-alpha.
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+
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+ o Minor bugfixes (interface):
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+ - Print usage information for --dump-config when it is used without
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+ an argument. Also, fix the error message to use different wording
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+ and add newline at the end. Fixes bug 15541; bugfix on 0.2.5.1-alpha.
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+
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+ o Minor bugfixes (logs):
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+ - When building Tor under Clang, do not include an extra set of
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+ parentheses in log messages that include function names.
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+ Fixes bug 15269; bugfix on every released version of Tor when
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+ compiled with recent enough Clang.
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+
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+ o Minor bugfixes (test networks)
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+ - When self-testing reachability, use ExtendAllowPrivateAddresses
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+ to determine if local/private addresses imply reachability.
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+ The previous fix used TestingTorNetwork, which implies
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+ ExtendAllowPrivateAddresses, but this excluded rare configs where
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+ ExtendAllowPrivateAddresses is set but TestingTorNetwork is not.
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+ Fixes bug 15771; bugfix on 0.2.6.1-alpha.
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+ Patch by "teor", issue discovered by CJ Ess.
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+
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+ o Minor bugfixes (testing):
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+ - Set the severity correctly when testing get_interface_addresses_ifaddrs()
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+ and get_interface_addresses_win32(), so that the tests fail gracefully
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+ instead of triggering an assertion. Fixes bug 15759; bugfix on
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+ 0.2.6.3-alpha. Reported by Nicolas Derive.
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+ - Check for matching value in server response in ntor_ref.py.
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+ Fixes bug 15591; bugfix on 0.2.4.8-alpha. Reported and fixed
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+ by "joelanders".
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+
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+ o Minor bugfixes (correctness):
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+ - Remove side-effects from tor_assert() calls. This was harmless,
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+ because we never disable assertions, but it is bad style and
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+ unnecessary. Fixes bug 15211; bugfix on 0.2.5.5, 0.2.2.36, and
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+ 0.2.0.10.
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+ - For correctness, avoid modifying a constant string in
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+ handle_control_postdescriptor. Fixes bug 15546; bugfix on
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+ 0.1.1.16-rc.
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+
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+ o Minor bugfixes (network):
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+ - When attempting to use fallback technique for network interface
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+ lookup, disregard loopback and multicast addresses since they are
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+ unsuitable for public communications.
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+
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+ o Code simplification and refactoring:
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+ - Move the hacky fallback code out of get_interface_address6()
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+ into separate function and get it covered with unit-tests. Resolves
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+ ticket 14710.
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+ - Refactor hidden service client-side cache lookup to intelligently
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+ report its various failure cases, and disentangle failure cases
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+ involving a lack of introduction points. Closes ticket 14391.
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+ - Use our own Base64 encoder instead of OpenSSL's, to allow more control
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+ over the output. Part of ticket 15652.
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+
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+ o Removed code:
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+ - Remove `USE_OPENSSL_BASE64` and the corresponding fallback code and
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+ always use the internal Base64 decoder. The internal decoder has been
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+ part of tor since tor-0.2.0.10-alpha, and no one should be using the
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+ OpenSSL one. Part of ticket 15652.
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+
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+ o Documentation:
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+ - Improve the descriptions of statistics-related torrc options in
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+ the manpage to describe rationale and possible uses cases. Fixes
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+ issue 15550.
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+ - Improve the layout and formatting of ./configure --help messages.
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+ Closes ticket 15024. Patch from "cypherpunks".
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+ - Standardize on the term "server descriptor" in the manual page.
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+ Previously, we had used "router descriptor", "server descriptor",
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+ and "relay descriptor" interchangeably. Part of ticket 14987.
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+
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+ o New system requirements:
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+ - Tor no longer includes workarounds for Libevent versions before 1.3e.
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+ Libevent 2.0 or later is recommended. Closes ticket 15248.
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+
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+ o Removed code:
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+ - Remove the 'tor_strclear()' function; use memwipe() instead.
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+ Closes ticket 14922.
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+
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+ o Removed features:
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+ - Remove the (seldom-used) DynamicDHGroups feature. For
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+ anti-fingerprinting we now recommend pluggable transports; for
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+ forward-secrecy in TLS, we now use the P-256 group.
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+ Closes ticket 13736.
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+ - Remove the undocumented "--digests" command-line option. It
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+ complicated our build process, caused subtle build issues
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+ on multiple platforms, and is now redundant since we started
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+ including git version identifiers. Closes ticket 14742.
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+ - Tor no longer contains workarounds for stat files generated by
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+ super-old versions of Tor that didn't choose guards sensibly.
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+ - Tor no longer contains checks for ancient directory cache versions
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+ that didn't know about microdescriptors.
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Changes in version 0.2.4.27 - 2015-04-06
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Nick Mathewson