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svn:r11702
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Roger Dingledine
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ReleaseNotes
176
ReleaseNotes
@ -3,6 +3,182 @@ This document summarizes new features and bugfixes in each stable release
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of Tor. If you want to see more detailed descriptions of the changes in
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each development snapshot, see the ChangeLog file.
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Changes in version 0.1.2.17 - 2007-08-30
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o Major bugfixes (security):
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- We removed support for the old (v0) control protocol. It has been
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deprecated since Tor 0.1.1.1-alpha, and keeping it secure has
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become more of a headache than it's worth.
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o Major bugfixes (load balancing):
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- When choosing nodes for non-guard positions, weight guards
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proportionally less, since they already have enough load. Patch
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from Mike Perry.
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- Raise the "max believable bandwidth" from 1.5MB/s to 10MB/s. This
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will allow fast Tor servers to get more attention.
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- When we're upgrading from an old Tor version, forget our current
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guards and pick new ones according to the new weightings. These
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three load balancing patches could raise effective network capacity
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by a factor of four. Thanks to Mike Perry for measurements.
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o Major bugfixes (stream expiration):
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- Expire not-yet-successful application streams in all cases if
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they've been around longer than SocksTimeout. Right now there are
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some cases where the stream will live forever, demanding a new
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circuit every 15 seconds. Fixes bug 454; reported by lodger.
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o Minor features (controller):
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- Add a PROTOCOLINFO controller command. Like AUTHENTICATE, it
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is valid before any authentication has been received. It tells
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a controller what kind of authentication is expected, and what
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protocol is spoken. Implements proposal 119.
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o Minor bugfixes (performance):
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- Save on most routerlist_assert_ok() calls in routerlist.c, thus
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greatly speeding up loading cached-routers from disk on startup.
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- Disable sentinel-based debugging for buffer code: we squashed all
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the bugs that this was supposed to detect a long time ago, and now
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its only effect is to change our buffer sizes from nice powers of
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two (which platform mallocs tend to like) to values slightly over
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powers of two (which make some platform mallocs sad).
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o Minor bugfixes (misc):
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- If exit bandwidth ever exceeds one third of total bandwidth, then
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use the correct formula to weight exit nodes when choosing paths.
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Based on patch from Mike Perry.
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- Choose perfectly fairly among routers when choosing by bandwidth and
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weighting by fraction of bandwidth provided by exits. Previously, we
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would choose with only approximate fairness, and correct ourselves
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if we ran off the end of the list.
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- If we require CookieAuthentication but we fail to write the
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cookie file, we would warn but not exit, and end up in a state
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where no controller could authenticate. Now we exit.
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- If we require CookieAuthentication, stop generating a new cookie
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every time we change any piece of our config.
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- Refuse to start with certain directory authority keys, and
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encourage people using them to stop.
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- Terminate multi-line control events properly. Original patch
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from tup.
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- Fix a minor memory leak when we fail to find enough suitable
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servers to choose a circuit.
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- Stop leaking part of the descriptor when we run into a particularly
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unparseable piece of it.
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Changes in version 0.1.2.16 - 2007-08-01
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o Major security fixes:
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- Close immediately after missing authentication on control port;
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do not allow multiple authentication attempts.
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Changes in version 0.1.2.15 - 2007-07-17
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o Major bugfixes (compilation):
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- Fix compile on FreeBSD/NetBSD/OpenBSD. Oops.
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o Major bugfixes (crashes):
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- Try even harder not to dereference the first character after
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an mmap(). Reported by lodger.
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- Fix a crash bug in directory authorities when we re-number the
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routerlist while inserting a new router.
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- When the cached-routers file is an even multiple of the page size,
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don't run off the end and crash. (Fixes bug 455; based on idea
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from croup.)
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- Fix eventdns.c behavior on Solaris: It is critical to include
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orconfig.h _before_ sys/types.h, so that we can get the expected
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definition of _FILE_OFFSET_BITS.
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o Major bugfixes (security):
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- Fix a possible buffer overrun when using BSD natd support. Bug
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found by croup.
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- When sending destroy cells from a circuit's origin, don't include
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the reason for tearing down the circuit. The spec says we didn't,
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and now we actually don't. Reported by lodger.
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- Keep streamids from different exits on a circuit separate. This
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bug may have allowed other routers on a given circuit to inject
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cells into streams. Reported by lodger; fixes bug 446.
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- If there's a never-before-connected-to guard node in our list,
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never choose any guards past it. This way we don't expand our
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guard list unless we need to.
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o Minor bugfixes (guard nodes):
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- Weight guard selection by bandwidth, so that low-bandwidth nodes
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don't get overused as guards.
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o Minor bugfixes (directory):
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- Correctly count the number of authorities that recommend each
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version. Previously, we were under-counting by 1.
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- Fix a potential crash bug when we load many server descriptors at
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once and some of them make others of them obsolete. Fixes bug 458.
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o Minor bugfixes (hidden services):
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- Stop tearing down the whole circuit when the user asks for a
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connection to a port that the hidden service didn't configure.
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Resolves bug 444.
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o Minor bugfixes (misc):
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- On Windows, we were preventing other processes from reading
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cached-routers while Tor was running. Reported by janbar.
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- Fix a possible (but very unlikely) bug in picking routers by
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bandwidth. Add a log message to confirm that it is in fact
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unlikely. Patch from lodger.
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- Backport a couple of memory leak fixes.
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- Backport miscellaneous cosmetic bugfixes.
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Changes in version 0.1.2.14 - 2007-05-25
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o Directory authority changes:
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- Two directory authorities (moria1 and moria2) just moved to new
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IP addresses. This change will particularly affect those who serve
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or use hidden services.
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o Major bugfixes (crashes):
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- If a directory server runs out of space in the connection table
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as it's processing a begin_dir request, it will free the exit stream
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but leave it attached to the circuit, leading to unpredictable
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behavior. (Reported by seeess, fixes bug 425.)
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- Fix a bug in dirserv_remove_invalid() that would cause authorities
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to corrupt memory under some really unlikely scenarios.
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- Tighten router parsing rules. (Bugs reported by Benedikt Boss.)
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- Avoid segfaults when reading from mmaped descriptor file. (Reported
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by lodger.)
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o Major bugfixes (security):
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- When choosing an entry guard for a circuit, avoid using guards
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that are in the same family as the chosen exit -- not just guards
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that are exactly the chosen exit. (Reported by lodger.)
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o Major bugfixes (resource management):
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- If a directory authority is down, skip it when deciding where to get
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networkstatus objects or descriptors. Otherwise we keep asking
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every 10 seconds forever. Fixes bug 384.
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- Count it as a failure if we fetch a valid network-status but we
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don't want to keep it. Otherwise we'll keep fetching it and keep
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not wanting to keep it. Fixes part of bug 422.
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- If all of our dirservers have given us bad or no networkstatuses
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lately, then stop hammering them once per minute even when we
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think they're failed. Fixes another part of bug 422.
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o Minor bugfixes:
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- Actually set the purpose correctly for descriptors inserted with
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purpose=controller.
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- When we have k non-v2 authorities in our DirServer config,
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we ignored the last k authorities in the list when updating our
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network-statuses.
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- Correctly back-off from requesting router descriptors that we are
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having a hard time downloading.
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- Read resolv.conf files correctly on platforms where read() returns
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partial results on small file reads.
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- Don't rebuild the entire router store every time we get 32K of
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routers: rebuild it when the journal gets very large, or when
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the gaps in the store get very large.
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o Minor features:
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- When routers publish SVN revisions in their router descriptors,
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authorities now include those versions correctly in networkstatus
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documents.
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- Warn when using a version of libevent before 1.3b to run a server on
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OSX or BSD: these versions interact badly with userspace threads.
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Changes in version 0.1.2.13 - 2007-04-24
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Tor 0.1.2.13 is released in memory of Rob Levin (1955-2006), aka lilo
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