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Changes in version 0.1.1.4-alpha - 2005-08-04
o Bugfixes included in 0.1.0.13.
o Features:
- Improve tor_gettimeofday() granularity on windows.
- Make clients regenerate their keys when their IP address changes.
- Implement some more GETINFO goodness: expose helper nodes, config
options, getinfo keys.
Changes in version 0.1.0.13 - 2005-08-04
o Bugfixes on 0.1.0.x:
- Fix a critical bug in the security of our crypto handshakes.
- Fix a size_t underflow in smartlist_join_strings2() that made
it do bad things when you hand it an empty smartlist.
- Fix Windows installer to ship Tor license (thanks to Aphex for
pointing out this oversight) and put a link to the doc directory
in the start menu.
- Explicitly set no-unaligned-access for sparc: it turns out the
new gcc's let you compile broken code, but that doesn't make it
not-broken.
Changes in version 0.1.1.3-alpha - 2005-07-23
o Bugfixes on 0.1.1.2-alpha:
- Fix a bug in handling the controller's "post descriptor"
function.
- Fix several bugs in handling the controller's "extend circuit"
function.
- Fix a bug in handling the controller's "stream status" event.
- Fix an assert failure if we have a controller listening for
circuit events and we go offline.
- Re-allow hidden service descriptors to publish 0 intro points.
- Fix a crash when generating your hidden service descriptor if
you don't have enough intro points already.
o New features on 0.1.1.2-alpha:
- New controller function "getinfo accounting", to ask how
many bytes we've used in this time period.
- Experimental support for helper nodes: a lot of the risk from
a small static adversary comes because users pick new random
nodes every time they rebuild a circuit. Now users will try to
stick to the same small set of entry nodes if they can. Not
enabled by default yet.
o Bugfixes on 0.1.0.12:
- If you're an auth dir server, always publish your dirport,
even if you haven't yet found yourself to be reachable.
- Fix a size_t underflow in smartlist_join_strings2() that made
it do bad things when you hand it an empty smartlist.
Changes in version 0.1.0.12 - 2005-07-18
o New directory servers:
- tor26 has changed IP address.
o Bugfixes on 0.1.0.x:
- Fix a possible double-free in tor_gzip_uncompress().
- When --disable-threads is set, do not search for or link against
pthreads libraries.
- Don't trigger an assert if an authoritative directory server
claims its dirport is 0.
- Fix bug with removing Tor as an NT service: some people were
getting "The service did not return an error." Thanks to Matt
Edman for the fix.
Changes in version 0.1.1.2-alpha - 2005-07-15
o New directory servers:
- tor26 has changed IP address.
o Bugfixes on 0.1.0.x, crashes/leaks:
- Port the servers-not-obeying-their-exit-policies fix from
0.1.0.11.
- Fix an fd leak in start_daemon().
- On Windows, you can't always reopen a port right after you've
closed it. So change retry_listeners() to only close and re-open
ports that have changed.
- Fix a possible double-free in tor_gzip_uncompress().
o Bugfixes on 0.1.0.x, usability:
- When tor_socketpair() fails in Windows, give a reasonable
Windows-style errno back.
- Let people type "tor --install" as well as "tor -install" when
they
want to make it an NT service.
- NT service patch from Matt Edman to improve error messages.
- When the controller asks for a config option with an abbreviated
name, give the full name in our response.
- Correct the man page entry on TrackHostExitsExpire.
- Looks like we were never delivering deflated (i.e. compressed)
running-routers lists, even when asked. Oops.
- When --disable-threads is set, do not search for or link against
pthreads libraries.
o Bugfixes on 0.1.1.x:
- Fix a seg fault with autodetecting which controller version is
being used.
o Features:
- New hidden service descriptor format: put a version in it, and
let people specify introduction/rendezvous points that aren't
in "the directory" (which is subjective anyway).
- Allow the DEBUG controller event to work again. Mark certain log
entries as "don't tell this to controllers", so we avoid cycles.
Changes in version 0.1.0.11 - 2005-06-30
o Bugfixes on 0.1.0.x:
- Fix major security bug: servers were disregarding their
exit policies if clients behaved unexpectedly.
- Make OS X init script check for missing argument, so we don't
confuse users who invoke it incorrectly.
- Fix a seg fault in "tor --hash-password foo".
- The MAPADDRESS control command was broken.
Changes in version 0.1.1.1-alpha - 2005-06-29
o Bugfixes:
- Make OS X init script check for missing argument, so we don't
confuse users who invoke it incorrectly.
- Fix a seg fault in "tor --hash-password foo".
- Fix a possible way to DoS dirservers.
- When we complain that your exit policy implicitly allows local or
private address spaces, name them explicitly so operators can
fix it.
- Make the log message less scary when all the dirservers are
temporarily unreachable.
- We were printing the number of idle dns workers incorrectly when
culling them.
o Features:
- Revised controller protocol (version 1) that uses ascii rather
than binary. Add supporting libraries in python and java so you
can use the controller from your applications without caring how
our protocol works.
- Spiffy new support for crypto hardware accelerators. Can somebody
test this?
Changes in version 0.0.9.10 - 2005-06-16
o Bugfixes on 0.0.9.x (backported from 0.1.0.10):
- Refuse relay cells that claim to have a length larger than the
maximum allowed. This prevents a potential attack that could read
arbitrary memory (e.g. keys) from an exit server's process
(CVE-2005-2050).
Changes in version 0.1.0.10 - 2005-06-14
o Allow a few EINVALs from libevent before dying. Warn on kqueue with
libevent before 1.1a.
Changes in version 0.1.0.9-rc - 2005-06-09
o Bugfixes:
- Reset buf->highwater every time buf_shrink() is called, not just on
a successful shrink. This was causing significant memory bloat.
- Fix buffer overflow when checking hashed passwords.
- Security fix: if seeding the RNG on Win32 fails, quit.
- Allow seeding the RNG on Win32 even when you're not running as
Administrator.
- Disable threading on Solaris too. Something is wonky with it,
cpuworkers, and reentrant libs.
- Reenable the part of the code that tries to flush as soon as an
OR outbuf has a full TLS record available. Perhaps this will make
OR outbufs not grow as huge except in rare cases, thus saving lots
of CPU time plus memory.
- Reject malformed .onion addresses rather then passing them on as
normal web requests.
- Adapt patch from Adam Langley: fix possible memory leak in
tor_lookup_hostname().
- Initialize libevent later in the startup process, so the logs are
already established by the time we start logging libevent warns.
- Use correct errno on win32 if libevent fails.
- Check and warn about known-bad/slow libevent versions.
- Pay more attention to the ClientOnly config option.
- Have torctl.in/tor.sh.in check for location of su binary (needed
on FreeBSD)
- Correct/add man page entries for LongLivedPorts, ExitPolicy,
KeepalivePeriod, ClientOnly, NoPublish, HttpProxy, HttpsProxy,
HttpProxyAuthenticator
- Stop warning about sigpipes in the logs. We're going to
pretend that getting these occassionally is normal and fine.
- Resolve OS X installer bugs: stop claiming to be 0.0.9.2 in
certain
installer screens; and don't put stuff into StartupItems unless
the user asks you to.
- Require servers that use the default dirservers to have public IP
addresses. We have too many servers that are configured with private
IPs and their admins never notice the log entries complaining that
their descriptors are being rejected.
- Add OSX uninstall instructions. An actual uninstall script will
come later.
Changes in version 0.1.0.8-rc - 2005-05-23
o Bugfixes:
- It turns out that kqueue on OS X 10.3.9 was causing kernel
panics. Disable kqueue on all OS X Tors.
- Fix RPM: remove duplicate line accidentally added to the rpm
spec file.
- Disable threads on openbsd too, since its gethostaddr is not
reentrant either.
- Tolerate libevent 0.8 since it still works, even though it's
ancient.
- Enable building on Red Hat 9.0 again.
- Allow the middle hop of the testing circuit to be running any
version, now that most of them have the bugfix to let them connect
to unknown servers. This will allow reachability testing to work
even when 0.0.9.7-0.0.9.9 become obsolete.
- Handle relay cells with rh.length too large. This prevents
a potential attack that could read arbitrary memory (maybe even
keys) from the exit server's process.
- We screwed up the dirport reachability testing when we don't yet
have a cached version of the directory. Hopefully now fixed.
- Clean up router_load_single_router() (used by the controller),
so it doesn't seg fault on error.
- Fix a minor memory leak when somebody establishes an introduction
point at your Tor server.
- If a socks connection ends because read fails, don't warn that
you're not sending a socks reply back.
o Features:
- Add HttpProxyAuthenticator config option too, that works like
the HttpsProxyAuthenticator config option.
- Encode hashed controller passwords in hex instead of base64,
to make it easier to write controllers.
Changes in version 0.1.0.7-rc - 2005-05-17
o Bugfixes:
- Fix a bug in the OS X package installer that prevented it from
installing on Tiger.
- Fix a script bug in the OS X package installer that made it
complain during installation.
- Find libevent even if it's hiding in /usr/local/ and your
CFLAGS and LDFLAGS don't tell you to look there.
- Be able to link with libevent as a shared library (the default
after 1.0d), even if it's hiding in /usr/local/lib and even
if you haven't added /usr/local/lib to your /etc/ld.so.conf,
assuming you're running gcc. Otherwise fail and give a useful
error message.
- Fix a bug in the RPM packager: set home directory for _tor to
something more reasonable when first installing.
- Free a minor amount of memory that is still reachable on exit.
Changes in version 0.1.0.6-rc - 2005-05-14
o Bugfixes:
- Implement --disable-threads configure option. Disable threads on
netbsd by default, because it appears to have no reentrant resolver
functions.
- Apple's OS X 10.4.0 ships with a broken kqueue. The new libevent
release (1.1) detects and disables kqueue if it's broken.
- Append default exit policy before checking for implicit internal
addresses. Now we don't log a bunch of complaints on startup
when using the default exit policy.
- Some people were putting "Address " in their torrc, and they had
a buggy resolver that resolved " " to 0.0.0.0. Oops.
- If DataDir is ~/.tor, and that expands to /.tor, then default to
LOCALSTATEDIR/tor instead.
- Fix fragmented-message bug in TorControl.py.
- Resolve a minor bug which would prevent unreachable dirports
from getting suppressed in the published descriptor.
- When the controller gave us a new descriptor, we weren't resolving
it immediately, so Tor would think its address was 0.0.0.0 until
we fetched a new directory.
- Fix an uppercase/lowercase case error in suppressing a bogus
libevent warning on some Linuxes.
o Features:
- Begin scrubbing sensitive strings from logs by default. Turn off
the config option SafeLogging if you need to do debugging.
- Switch to a new buffer management algorithm, which tries to avoid
reallocing and copying quite as much. In first tests it looks like
it uses *more* memory on average, but less cpu.
- First cut at support for "create-fast" cells. Clients can use
these when extending to their first hop, since the TLS already
provides forward secrecy and authentication. Not enabled on
clients yet.
- When dirservers refuse a router descriptor, we now log its
contactinfo, platform, and the poster's IP address.
- Call tor_free_all instead of connections_free_all after forking, to
save memory on systems that need to fork.
- Whine at you if you're a server and you don't set your contactinfo.
- Implement --verify-config command-line option to check if your torrc
is valid without actually launching Tor.
- Rewrite address "serifos.exit" to "localhost.serifos.exit"
rather than just rejecting it.
Changes in version 0.1.0.5-rc - 2005-04-27
o Bugfixes:
- Stop trying to print a null pointer if an OR conn fails because
we didn't like its cert.
o Features:
- Switch our internal buffers implementation to use a ring buffer,
to hopefully improve performance for fast servers a lot.
- Add HttpsProxyAuthenticator support (basic auth only), based
on patch from Adam Langley.
- Bump the default BandwidthRate from 1 MB to 2 MB, to accommodate
the fast servers that have been joining lately.
- Give hidden service accesses extra time on the first attempt,
since 60 seconds is often only barely enough. This might improve
robustness more.
- Improve performance for dirservers: stop re-parsing the whole
directory every time you regenerate it.
- Add more debugging info to help us find the weird dns freebsd
pthreads bug; cleaner debug messages to help track future issues.
Changes in version 0.0.9.9 - 2005-04-23
o Bugfixes on 0.0.9.x:
- If unofficial Tor clients connect and send weird TLS certs, our
Tor server triggers an assert. This release contains a minimal
backport from the broader fix that we put into 0.1.0.4-rc.
Changes in version 0.1.0.4-rc - 2005-04-23
o Bugfixes:
- If unofficial Tor clients connect and send weird TLS certs, our
Tor server triggers an assert. Stop asserting, and start handling
TLS errors better in other situations too.
- When the controller asks us to tell it about all the debug-level
logs, it turns out we were generating debug-level logs while
telling it about them, which turns into a bad loop. Now keep
track of whether you're sending a debug log to the controller,
and don't log when you are.
- Fix the "postdescriptor" feature of the controller interface: on
non-complete success, only say "done" once.
o Features:
- Clients are now willing to load balance over up to 2mB, not 1mB,
of advertised bandwidth capacity.
- Add a NoPublish config option, so you can be a server (e.g. for
testing running Tor servers in other Tor networks) without
publishing your descriptor to the primary dirservers.
Changes in version 0.1.0.3-rc - 2005-04-08
o Improvements on 0.1.0.2-rc:
- Client now retries when streams end early for 'hibernating' or
'resource limit' reasons, rather than failing them.
- More automated handling for dirserver operators:
- Automatically approve nodes running 0.1.0.2-rc or later,
now that the the reachability detection stuff is working.
- Now we allow two unverified servers with the same nickname
but different keys. But if a nickname is verified, only that
nickname+key are allowed.
- If you're an authdirserver connecting to an address:port,
and it's not the OR you were expecting, forget about that
descriptor. If he *was* the one you were expecting, then forget
about all other descriptors for that address:port.
- Allow servers to publish descriptors from 12 hours in the future.
Corollary: only whine about clock skew from the dirserver if
he's a trusted dirserver (since now even verified servers could
have quite wrong clocks).
- Adjust maximum skew and age for rendezvous descriptors: let skew
be 48 hours rather than 90 minutes.
- Efficiency improvements:
- Keep a big splay tree of (circid,orconn)->circuit mappings to make
it much faster to look up a circuit for each relay cell.
- Remove most calls to assert_all_pending_dns_resolves_ok(),
since they're eating our cpu on exit nodes.
- Stop wasting time doing a case insensitive comparison for every
dns name every time we do any lookup. Canonicalize the names to
lowercase and be done with it.
- Start sending 'truncated' cells back rather than destroy cells,
if the circuit closes in front of you. This means we won't have
to abandon partially built circuits.
- Only warn once per nickname from add_nickname_list_to_smartlist
per failure, so an entrynode or exitnode choice that's down won't
yell so much.
- Put a note in the torrc about abuse potential with the default
exit policy.
- Revise control spec and implementation to allow all log messages to
be sent to controller with their severities intact (suggested by
Matt Edman). Update TorControl to handle new log event types.
- Provide better explanation messages when controller's POSTDESCRIPTOR
fails.
- Stop putting nodename in the Platform string in server descriptors.
It doesn't actually help, and it is confusing/upsetting some people.
o Bugfixes on 0.1.0.2-rc:
- We were printing the host mask wrong in exit policies in server
descriptors. This isn't a critical bug though, since we were still
obeying the exit policy internally.
- Fix Tor when compiled with libevent but without pthreads: move
connection_unregister() from _connection_free() to
connection_free().
- Fix an assert trigger (already fixed in 0.0.9.x): when we have
the rare mysterious case of accepting a conn on 0.0.0.0:0, then
when we look through the connection array, we'll find any of the
cpu/dnsworkers. This is no good.
o Bugfixes on 0.0.9.8:
- Fix possible bug on threading platforms (e.g. win32) which was
leaking a file descriptor whenever a cpuworker or dnsworker died.
- When using preferred entry or exit nodes, ignore whether the
circuit wants uptime or capacity. They asked for the nodes, they
get the nodes.
- chdir() to your datadirectory at the *end* of the daemonize process,
not the beginning. This was a problem because the first time you
run tor, if your datadir isn't there, and you have runasdaemon set
to 1, it will try to chdir to it before it tries to create it. Oops.
- Handle changed router status correctly when dirserver reloads
fingerprint file. We used to be dropping all unverified descriptors
right then. The bug was hidden because we would immediately
fetch a directory from another dirserver, which would include the
descriptors we just dropped.
- When we're connecting to an OR and he's got a different nickname/key
than we were expecting, only complain loudly if we're an OP or a
dirserver. Complaining loudly to the OR admins just confuses them.
- Tie MAX_DIR_SIZE to MAX_BUF_SIZE, so now directory sizes won't get
artificially capped at 500kB.
Changes in version 0.0.9.8 - 2005-04-07
o Bugfixes on 0.0.9.x:
- We have a bug that I haven't found yet. Sometimes, very rarely,
cpuworkers get stuck in the 'busy' state, even though the cpuworker
thinks of itself as idle. This meant that no new circuits ever got
established. Here's a workaround to kill any cpuworker that's been
busy for more than 100 seconds.
Changes in version 0.1.0.2-rc - 2005-04-01
o Bugfixes on 0.1.0.1-rc:
- Fixes on reachability detection:
- Don't check for reachability while hibernating.
- If ORPort is reachable but DirPort isn't, still publish the
descriptor, but zero out DirPort until it's found reachable.
- When building testing circs for ORPort testing, use only
high-bandwidth nodes, so fewer circuits fail.
- Complain about unreachable ORPort separately from unreachable
DirPort, so the user knows what's going on.
- Make sure we only conclude ORPort reachability if we didn't
initiate the conn. Otherwise we could falsely conclude that
we're reachable just because we connected to the guy earlier
and he used that same pipe to extend to us.
- Authdirservers shouldn't do ORPort reachability detection,
since they're in clique mode, so it will be rare to find a
server not already connected to them.
- When building testing circuits, always pick middle hops running
Tor 0.0.9.7, so we avoid the "can't extend to unknown routers"
bug. (This is a kludge; it will go away when 0.0.9.x becomes
obsolete.)
- When we decide we're reachable, actually publish our descriptor
right then.
- Fix bug in redirectstream in the controller.
- Fix the state descriptor strings so logs don't claim edge streams
are in a different state than they actually are.
- Use recent libevent features when possible (this only really affects
win32 and osx right now, because the new libevent with these
features hasn't been released yet). Add code to suppress spurious
libevent log msgs.
- Prevent possible segfault in connection_close_unattached_ap().
- Fix newlines on torrc in win32.
- Improve error msgs when tor-resolve fails.
o Improvements on 0.0.9.x:
- New experimental script tor/contrib/ExerciseServer.py (needs more
work) that uses the controller interface to build circuits and
fetch pages over them. This will help us bootstrap servers that
have lots of capacity but haven't noticed it yet.
- New experimental script tor/contrib/PathDemo.py (needs more work)
that uses the controller interface to let you choose whole paths
via addresses like
"<hostname>.<path,separated by dots>.<length of path>.path"
- When we've connected to an OR and handshaked but didn't like
the result, we were closing the conn without sending destroy
cells back for pending circuits. Now send those destroys.
Changes in version 0.0.9.7 - 2005-04-01
o Bugfixes on 0.0.9.x:
- Fix another race crash bug (thanks to Glenn Fink for reporting).
- Compare identity to identity, not to nickname, when extending to
a router not already in the directory. This was preventing us from
extending to unknown routers. Oops.
- Make sure to create OS X Tor user in <500 range, so we aren't
creating actual system users.
- Note where connection-that-hasn't-sent-end was marked, and fix
a few really loud instances of this harmless bug (it's fixed more
in 0.1.0.x).
Changes in version 0.1.0.1-rc - 2005-03-28
o New features:
- Add reachability testing. Your Tor server will automatically try
to see if its ORPort and DirPort are reachable from the outside,
and it won't upload its descriptor until it decides they are.
- Handle unavailable hidden services better. Handle slow or busy
hidden services better.
- Add support for CONNECTing through https proxies, with "HttpsProxy"
config option.
- New exit policy: accept most low-numbered ports, rather than
rejecting most low-numbered ports.
- More Tor controller support (still experimental). See
http://tor.eff.org/doc/control-spec.txt for all the new features,
including signals to emulate unix signals from any platform;
redirectstream; extendcircuit; mapaddress; getinfo; postdescriptor;
closestream; closecircuit; etc.
- Make nt services work and start on startup on win32 (based on
patch by Matt Edman).
- Add a new AddressMap config directive to rewrite incoming socks
addresses. This lets you, for example, declare an implicit
required exit node for certain sites.
- Add a new TrackHostExits config directive to trigger addressmaps
for certain incoming socks addresses -- for sites that break when
your exit keeps changing (based on patch by Mike Perry).
- Redo the client-side dns cache so it's just an addressmap too.
- Notice when our IP changes, and reset stats/uptime/reachability.
- When an application is using socks5, give him the whole variety of
potential socks5 responses (connect refused, host unreachable, etc),
rather than just "success" or "failure".
- A more sane version numbering system. See
http://tor.eff.org/cvs/tor/doc/version-spec.txt for details.
- New contributed script "exitlist": a simple python script to
parse directories and find Tor nodes that exit to listed
addresses/ports.
- New contributed script "privoxy-tor-toggle" to toggle whether
Privoxy uses Tor. Seems to be configured for Debian by default.
- Report HTTP reasons to client when getting a response from directory
servers -- so you can actually know what went wrong.
- New config option MaxAdvertisedBandwidth which lets you advertise
a low bandwidthrate (to not attract as many circuits) while still
allowing a higher bandwidthrate in reality.
o Robustness/stability fixes:
- Make Tor use Niels Provos's libevent instead of its current
poll-but-sometimes-select mess. This will let us use faster async
cores (like epoll, kpoll, and /dev/poll), and hopefully work better
on Windows too.
- pthread support now too. This was forced because when we forked,
we ended up wasting a lot of duplicate ram over time. Also switch
to foo_r versions of some library calls to allow reentry and
threadsafeness.
- Better handling for heterogeneous / unreliable nodes:
- Annotate circuits w/ whether they aim to contain high uptime nodes
and/or high capacity nodes. When building circuits, choose
appropriate nodes.
- This means that every single node in an intro rend circuit,
not just the last one, will have a minimum uptime.
- New config option LongLivedPorts to indicate application streams
that will want high uptime circuits.
- Servers reset uptime when a dir fetch entirely fails. This
hopefully reflects stability of the server's network connectivity.
- If somebody starts his tor server in Jan 2004 and then fixes his
clock, don't make his published uptime be a year.
- Reset published uptime when you wake up from hibernation.
- Introduce a notion of 'internal' circs, which are chosen without
regard to the exit policy of the last hop. Intro and rendezvous
circs must be internal circs, to avoid leaking information. Resolve
and connect streams can use internal circs if they want.
- New circuit pooling algorithm: make sure to have enough circs around
to satisfy any predicted ports, and also make sure to have 2 internal
circs around if we've required internal circs lately (and with high
uptime if we've seen that lately too).
- Split NewCircuitPeriod option into NewCircuitPeriod (30 secs),
which describes how often we retry making new circuits if current
ones are dirty, and MaxCircuitDirtiness (10 mins), which describes
how long we're willing to make use of an already-dirty circuit.
- Cannibalize GENERAL circs to be C_REND, C_INTRO, S_INTRO, and S_REND
circ as necessary, if there are any completed ones lying around
when we try to launch one.
- Make hidden services try to establish a rendezvous for 30 seconds,
rather than for n (where n=3) attempts to build a circuit.
- Change SHUTDOWN_WAIT_LENGTH from a fixed 30 secs to a config option
"ShutdownWaitLength".
- Try to be more zealous about calling connection_edge_end when
things go bad with edge conns in connection.c.
- Revise tor-spec to add more/better stream end reasons.
- Revise all calls to connection_edge_end to avoid sending "misc",
and to take errno into account where possible.
o Bug fixes:
- Fix a race condition that can trigger an assert, when we have a
pending create cell and an OR connection fails right then.
- Fix several double-mark-for-close bugs, e.g. where we were finding
a conn for a cell even if that conn is already marked for close.
- Make sequence of log messages when starting on win32 with no config
file more reasonable.
- When choosing an exit node for a new non-internal circ, don't take
into account whether it'll be useful for any pending x.onion
addresses -- it won't.
- Turn addr_policy_compare from a tristate to a quadstate; this should
help address our "Ah, you allow 1.2.3.4:80. You are a good choice
for google.com" problem.
- Make "platform" string in descriptor more accurate for Win32 servers,
so it's not just "unknown platform".
- Fix an edge case in parsing config options (thanks weasel).
If they say "--" on the commandline, it's not an option.
- Reject odd-looking addresses at the client (e.g. addresses that
contain a colon), rather than having the server drop them because
they're malformed.
- tor-resolve requests were ignoring .exit if there was a working circuit
they could use instead.
- REUSEADDR on normal platforms means you can rebind to the port
right after somebody else has let it go. But REUSEADDR on win32
means to let you bind to the port _even when somebody else
already has it bound_! So, don't do that on Win32.
- Change version parsing logic: a version is "obsolete" if it is not
recommended and (1) there is a newer recommended version in the
same series, or (2) there are no recommended versions in the same
series, but there are some recommended versions in a newer series.
A version is "new" if it is newer than any recommended version in
the same series.
- Stop most cases of hanging up on a socks connection without sending
the socks reject.
o Helpful fixes:
- Require BandwidthRate to be at least 20kB/s for servers.
- When a dirserver causes you to give a warn, mention which dirserver
it was.
- New config option DirAllowPrivateAddresses for authdirservers.
Now by default they refuse router descriptors that have non-IP or
private-IP addresses.
- Stop publishing socksport in the directory, since it's not
actually meant to be public. For compatibility, publish a 0 there
for now.
- Change DirFetchPeriod/StatusFetchPeriod to have a special "Be
smart" value, that is low for servers and high for clients.
- If our clock jumps forward by 100 seconds or more, assume something
has gone wrong with our network and abandon all not-yet-used circs.
- Warn when exit policy implicitly allows local addresses.
- If we get an incredibly skewed timestamp from a dirserver mirror
that isn't a verified OR, don't warn -- it's probably him that's
wrong.
- Since we ship our own Privoxy on OS X, tweak it so it doesn't write
cookies to disk and doesn't log each web request to disk. (Thanks
to Brett Carrington for pointing this out.)
- When a client asks us for a dir mirror and we don't have one,
launch an attempt to get a fresh one.
- If we're hibernating and we get a SIGINT, exit immediately.
- Add --with-dmalloc ./configure option, to track memory leaks.
- And try to free all memory on closing, so we can detect what
we're leaking.
- Cache local dns resolves correctly even when they're .exit
addresses.
- Give a better warning when some other server advertises an
ORPort that is actually an apache running ssl.
- Add "opt hibernating 1" to server descriptor to make it clearer
whether the server is hibernating.
Changes in version 0.0.9.6 - 2005-03-24
o Bugfixes on 0.0.9.x (crashes and asserts):
- Add new end stream reasons to maintainance branch. Fix bug where
reason (8) could trigger an assert. Prevent bug from recurring.
- Apparently win32 stat wants paths to not end with a slash.
- Fix assert triggers in assert_cpath_layer_ok(), where we were
blowing away the circuit that conn->cpath_layer points to, then
checking to see if the circ is well-formed. Backport check to make
sure we dont use the cpath on a closed connection.
- Prevent circuit_resume_edge_reading_helper() from trying to package
inbufs for marked-for-close streams.
- Don't crash on hup if your options->address has become unresolvable.
- Some systems (like OS X) sometimes accept() a connection and tell
you the remote host is 0.0.0.0:0. If this happens, due to some
other mis-features, we get confused; so refuse the conn for now.
o Bugfixes on 0.0.9.x (other):
- Fix harmless but scary "Unrecognized content encoding" warn message.
- Add new stream error reason: TORPROTOCOL reason means "you are not
speaking a version of Tor I understand; say bye-bye to your stream."
- Be willing to cache directories from up to ROUTER_MAX_AGE seconds
into the future, now that we are more tolerant of skew. This
resolves a bug where a Tor server would refuse to cache a directory
because all the directories it gets are too far in the future;
yet the Tor server never logs any complaints about clock skew.
- Mac packaging magic: make man pages useable, and do not overwrite
existing torrc files.
- Make OS X log happily to /var/log/tor/tor.log
Changes in version 0.0.9.5 - 2005-02-22
o Bugfixes on 0.0.9.x:
- Fix an assert race at exit nodes when resolve requests fail.
- Stop picking unverified dir mirrors--it only leads to misery.
- Patch from Matt Edman to make NT services work better. Service
support is still not compiled into the executable by default.
- Patch from Dmitri Bely so the Tor service runs better under
the win32 SYSTEM account.
- Make tor-resolve actually work (?) on Win32.
- Fix a sign bug when getrlimit claims to have 4+ billion
file descriptors available.
- Stop refusing to start when bandwidthburst == bandwidthrate.
- When create cells have been on the onion queue more than five
seconds, just send back a destroy and take them off the list.
Changes in version 0.0.9.4 - 2005-02-03
o Bugfixes on 0.0.9:
- Fix an assert bug that took down most of our servers: when
a server claims to have 1 GB of bandwidthburst, don't
freak out.
- Don't crash as badly if we have spawned the max allowed number
of dnsworkers, or we're out of file descriptors.
- Block more file-sharing ports in the default exit policy.
- MaxConn is now automatically set to the hard limit of max
file descriptors we're allowed (ulimit -n), minus a few for
logs, etc.
- Give a clearer message when servers need to raise their
ulimit -n when they start running out of file descriptors.
- SGI Compatibility patches from Jan Schaumann.
- Tolerate a corrupt cached directory better.
- When a dirserver hasn't approved your server, list which one.
- Go into soft hibernation after 95% of the bandwidth is used,
not 99%. This is especially important for daily hibernators who
have a small accounting max. Hopefully it will result in fewer
cut connections when the hard hibernation starts.
- Load-balance better when using servers that claim more than
800kB/s of capacity.
- Make NT services work (experimental, only used if compiled in).
Changes in version 0.0.9.3 - 2005-01-21
o Bugfixes on 0.0.9:
- Backport the cpu use fixes from main branch, so busy servers won't
need as much processor time.
- Work better when we go offline and then come back, or when we
run Tor at boot before the network is up. We do this by
optimistically trying to fetch a new directory whenever an
application request comes in and we think we're offline -- the
human is hopefully a good measure of when the network is back.
- Backport some minimal hidserv bugfixes: keep rend circuits open as
long as you keep using them; actually publish hidserv descriptors
shortly after they change, rather than waiting 20-40 minutes.
- Enable Mac startup script by default.
- Fix duplicate dns_cancel_pending_resolve reported by Giorgos Pallas.
- When you update AllowUnverifiedNodes or FirewallPorts via the
controller's setconf feature, we were always appending, never
resetting.
- When you update HiddenServiceDir via setconf, it was screwing up
the order of reading the lines, making it fail.
- Do not rewrite a cached directory back to the cache; otherwise we
will think it is recent and not fetch a newer one on startup.
- Workaround for webservers that lie about Content-Encoding: Tor
now tries to autodetect compressed directories and compression
itself. This lets us Proxypass dir fetches through apache.
Changes in version 0.0.9.2 - 2005-01-04
o Bugfixes on 0.0.9 (crashes and asserts):
- Fix an assert on startup when the disk is full and you're logging
to a file.
- If you do socks4 with an IP of 0.0.0.x but *don't* provide a socks4a
style address, then we'd crash.
- Fix an assert trigger when the running-routers string we get from
a dirserver is broken.
- Make worker threads start and run on win32. Now win32 servers
may work better.
- Bandaid (not actually fix, but now it doesn't crash) an assert
where the dns worker dies mysteriously and the main Tor process
doesn't remember anything about the address it was resolving.
o Bugfixes on 0.0.9 (Win32):
- Workaround for brain-damaged __FILE__ handling on MSVC: keep Nick's
name out of the warning/assert messages.
- Fix a superficial "unhandled error on read" bug on win32.
- The win32 installer no longer requires a click-through for our
license, since our Free Software license grants rights but does not
take any away.
- Win32: When connecting to a dirserver fails, try another one
immediately. (This was already working for non-win32 Tors.)
- Stop trying to parse $HOME on win32 when hunting for default
DataDirectory.
- Make tor-resolve.c work on win32 by calling network_init().
o Bugfixes on 0.0.9 (other):
- Make 0.0.9.x build on Solaris again.
- Due to a fencepost error, we were blowing away the n when reporting
confvalue items in the controller. So asking for multiple config
values at once couldn't work.
- When listing circuits that are pending on an opening OR connection,
if we're an OR we were listing circuits that *end* at us as
being pending on every listener, dns/cpu worker, etc. Stop that.
- Dirservers were failing to create 'running-routers' or 'directory'
strings if we had more than some threshold of routers. Fix them so
they can handle any number of routers.
- Fix a superficial "Duplicate mark for close" bug.
- Stop checking for clock skew for OR connections, even for servers.
- Fix a fencepost error that was chopping off the last letter of any
nickname that is the maximum allowed nickname length.
- Update URLs in log messages so they point to the new website.
- Fix a potential problem in mangling server private keys while
writing to disk (not triggered yet, as far as we know).
- Include the licenses for other free software we include in Tor,
now that we're shipping binary distributions more regularly.
Changes in version 0.0.9.1 - 2004-12-15
o Bugfixes on 0.0.9:
- Make hibernation actually work.
- Make HashedControlPassword config option work.
- When we're reporting event circuit status to a controller,
don't use the stream status code.
Changes in version 0.0.9 - 2004-12-12
o Cleanups:
- Clean up manpage and torrc.sample file.
- Clean up severities and text of log warnings.
o Mistakes:
- Make servers trigger an assert when they enter hibernation.
Changes in version 0.0.9rc7 - 2004-12-08
o Bugfixes on 0.0.9rc:
- Fix a stack-trashing crash when an exit node begins hibernating.
- Avoid looking at unallocated memory while considering which
ports we need to build circuits to cover.
- Stop a sigpipe: when an 'end' cell races with eof from the app,
we shouldn't hold-open-until-flush if the eof arrived first.
- Fix a bug with init_cookie_authentication() in the controller.
- When recommending new-format log lines, if the upper bound is
LOG_ERR, leave it implicit.
o Bugfixes on 0.0.8.1:
- Fix a whole slew of memory leaks.
- Fix isspace() and friends so they still make Solaris happy
but also so they don't trigger asserts on win32.
- Fix parse_iso_time on platforms without strptime (eg win32).
- win32: tolerate extra "readable" events better.
- win32: when being multithreaded, leave parent fdarray open.
- Make unit tests work on win32.
Changes in version 0.0.9rc6 - 2004-12-06
o Bugfixes on 0.0.9pre:
- Clean up some more integer underflow opportunities (not exploitable
we think).
- While hibernating, hup should not regrow our listeners.
- Send an end to the streams we close when we hibernate, rather
than just chopping them off.
- React to eof immediately on non-open edge connections.
o Bugfixes on 0.0.8.1:
- Calculate timeout for waiting for a connected cell from the time
we sent the begin cell, not from the time the stream started. If
it took a long time to establish the circuit, we would time out
right after sending the begin cell.
- Fix router_compare_addr_to_addr_policy: it was not treating a port
of * as always matching, so we were picking reject *:* nodes as
exit nodes too. Oops.
o Features:
- New circuit building strategy: keep a list of ports that we've
used in the past 6 hours, and always try to have 2 circuits open
or on the way that will handle each such port. Seed us with port
80 so web users won't complain that Tor is "slow to start up".
- Make kill -USR1 dump more useful stats about circuits.
- When warning about retrying or giving up, print the address, so
the user knows which one it's talking about.
- If you haven't used a clean circuit in an hour, throw it away,
just to be on the safe side. (This means after 6 hours a totally
unused Tor client will have no circuits open.)
Changes in version 0.0.9rc5 - 2004-12-01
o Bugfixes on 0.0.8.1:
- Disallow NDEBUG. We don't ever want anybody to turn off debug.
- Let resolve conns retry/expire also, rather than sticking around
forever.
- If we are using select, make sure we stay within FD_SETSIZE.
o Bugfixes on 0.0.9pre:
- Fix integer underflow in tor_vsnprintf() that may be exploitable,
but doesn't seem to be currently; thanks to Ilja van Sprundel for
finding it.
- If anybody set DirFetchPostPeriod, give them StatusFetchPeriod
instead. Impose minima and maxima for all *Period options; impose
even tighter maxima for fetching if we are a caching dirserver.
Clip rather than rejecting.
- Fetch cached running-routers from servers that serve it (that is,
authdirservers and servers running 0.0.9rc5-cvs or later.)
o Features:
- Accept *:706 (silc) in default exit policy.
- Implement new versioning format for post 0.1.
- Support "foo.nickname.exit" addresses, to let Alice request the
address "foo" as viewed by exit node "nickname". Based on a patch
by Geoff Goodell.
- Make tor --version --version dump the cvs Id of every file.
Changes in version 0.0.9rc4 - 2004-11-28
o Bugfixes on 0.0.8.1:
- Make windows sockets actually non-blocking (oops), and handle
win32 socket errors better.
o Bugfixes on 0.0.9rc1:
- Actually catch the -USR2 signal.
Changes in version 0.0.9rc3 - 2004-11-25
o Bugfixes on 0.0.8.1:
- Flush the log file descriptor after we print "Tor opening log file",
so we don't see those messages days later.
o Bugfixes on 0.0.9rc1:
- Make tor-resolve work again.
- Avoid infinite loop in tor-resolve if tor hangs up on it.
- Fix an assert trigger for clients/servers handling resolves.
Changes in version 0.0.9rc2 - 2004-11-24
o Bugfixes on 0.0.9rc1:
- I broke socks5 support while fixing the eof bug.
- Allow unitless bandwidths and intervals; they default to bytes
and seconds.
- New servers don't start out hibernating; they are active until
they run out of bytes, so they have a better estimate of how
long it takes, and so their operators can know they're working.
Changes in version 0.0.9rc1 - 2004-11-23
o Bugfixes on 0.0.8.1:
- Finally fix a bug that's been plaguing us for a year:
With high load, circuit package window was reaching 0. Whenever
we got a circuit-level sendme, we were reading a lot on each
socket, but only writing out a bit. So we would eventually reach
eof. This would be noticed and acted on even when there were still
bytes sitting in the inbuf.
- When poll() is interrupted, we shouldn't believe the revents values.
o Bugfixes on 0.0.9pre6:
- Fix hibernate bug that caused pre6 to be broken.
- Don't keep rephist info for routers that haven't had activity for
24 hours. (This matters now that clients have keys, since we track
them too.)
- Never call close_temp_logs while validating log options.
- Fix backslash-escaping on tor.sh.in and torctl.in.
o Features:
- Implement weekly/monthly/daily accounting: now you specify your
hibernation properties by
AccountingMax N bytes|KB|MB|GB|TB
AccountingStart day|week|month [day] HH:MM
Defaults to "month 1 0:00".
- Let bandwidth and interval config options be specified as 5 bytes,
kb, kilobytes, etc; and as seconds, minutes, hours, days, weeks.
- kill -USR2 now moves all logs to loglevel debug (kill -HUP to
get back to normal.)
- If your requested entry or exit node has advertised bandwidth 0,
pick it anyway.
- Be more greedy about filling up relay cells -- we try reading again
once we've processed the stuff we read, in case enough has arrived
to fill the last cell completely.
- Apply NT service patch from Osamu Fujino. Still needs more work.
Changes in version 0.0.9pre6 - 2004-11-15
o Bugfixes on 0.0.8.1:
- Fix assert failure on malformed socks4a requests.
- Use identity comparison, not nickname comparison, to choose which
half of circuit-ID-space each side gets to use. This is needed
because sometimes we think of a router as a nickname, and sometimes
as a hex ID, and we can't predict what the other side will do.
- Catch and ignore SIGXFSZ signals when log files exceed 2GB; our
write() call will fail and we handle it there.
- Add a FAST_SMARTLIST define to optionally inline smartlist_get
and smartlist_len, which are two major profiling offenders.
o Bugfixes on 0.0.9pre5:
- Fix a bug in read_all that was corrupting config files on windows.
- When we're raising the max number of open file descriptors to
'unlimited', don't log that we just raised it to '-1'.
- Include event code with events, as required by control-spec.txt.
- Don't give a fingerprint when clients do --list-fingerprint:
it's misleading, because it will never be the same again.
- Stop using strlcpy in tor_strndup, since it was slowing us
down a lot.
- Remove warn on startup about missing cached-directory file.
- Make kill -USR1 work again.
- Hibernate if we start tor during the "wait for wakeup-time" phase
of an accounting interval. Log our hibernation plans better.
- Authoritative dirservers now also cache their directory, so they
have it on start-up.
o Features:
- Fetch running-routers; cache running-routers; compress
running-routers; serve compressed running-routers.z
- Add NSI installer script contributed by J Doe.
- Commit VC6 and VC7 workspace/project files.
- Commit a tor.spec for making RPM files, with help from jbash.
- Add contrib/torctl.in contributed by Glenn Fink.
- Implement the control-spec's SAVECONF command, to write your
configuration to torrc.
- Get cookie authentication for the controller closer to working.
- Include control-spec.txt in the tarball.
- When set_conf changes our server descriptor, upload a new copy.
But don't upload it too often if there are frequent changes.
- Document authentication config in man page, and document signals
we catch.
- Clean up confusing parts of man page and torrc.sample.
- Make expand_filename handle ~ and ~username.
- Use autoconf to enable largefile support where necessary. Use
ftello where available, since ftell can fail at 2GB.
- Distinguish between TOR_TLS_CLOSE and TOR_TLS_ERROR, so we can
log more informatively.
- Give a slightly more useful output for "tor -h".
- Refuse application socks connections to port 0.
- Check clock skew for verified servers, but allow unverified
servers and clients to have any clock skew.
- Break DirFetchPostPeriod into:
- DirFetchPeriod for fetching full directory,
- StatusFetchPeriod for fetching running-routers,
- DirPostPeriod for posting server descriptor,
- RendPostPeriod for posting hidden service descriptors.
- Make sure the hidden service descriptors are at a random offset
from each other, to hinder linkability.
Changes in version 0.0.9pre5 - 2004-11-09
o Bugfixes on 0.0.9pre4:
- Fix a seg fault in unit tests (doesn't affect main program).
- Fix an assert bug where a hidden service provider would fail if
the first hop of his rendezvous circuit was down.
- Hidden service operators now correctly handle version 1 style
INTRODUCE1 cells (nobody generates them still, so not a critical
bug).
- If do_hup fails, actually notice.
- Handle more errnos from accept() without closing the listener.
Some OpenBSD machines were closing their listeners because
they ran out of file descriptors.
- Send resolve cells to exit routers that are running a new
enough version of the resolve code to work right.
- Better handling of winsock includes on non-MSV win32 compilers.
- Some people had wrapped their tor client/server in a script
that would restart it whenever it died. This did not play well
with our "shut down if your version is obsolete" code. Now people
don't fetch a new directory if their local cached version is
recent enough.
- Make our autogen.sh work on ksh as well as bash.
o Major Features:
- Hibernation: New config option "AccountingMaxKB" lets you
set how many KBytes per month you want to allow your server to
consume. Rather than spreading those bytes out evenly over the
month, we instead hibernate for some of the month and pop up
at a deterministic time, work until the bytes are consumed, then
hibernate again. Config option "MonthlyAccountingStart" lets you
specify which day of the month your billing cycle starts on.
- Control interface: a separate program can now talk to your
client/server over a socket, and get/set config options, receive
notifications of circuits and streams starting/finishing/dying,
bandwidth used, etc. The next step is to get some GUIs working.
Let us know if you want to help out. See doc/control-spec.txt .
- Ship a contrib/tor-control.py as an example script to interact
with the control port.
- "tor --hash-password zzyxz" will output a salted password for
use in authenticating to the control interface.
- New log format in config:
"Log minsev[-maxsev] stdout|stderr|syslog" or
"Log minsev[-maxsev] file /var/foo"
o Minor Features:
- DirPolicy config option, to let people reject incoming addresses
from their dirserver.
- "tor --list-fingerprint" will list your identity key fingerprint
and then exit.
- Add "pass" target for RedirectExit, to make it easier to break
out of a sequence of RedirectExit rules.
- Clients now generate a TLS cert too, in preparation for having
them act more like real nodes.
- Ship src/win32/ in the tarball, so people can use it to build.
- Make old win32 fall back to CWD if SHGetSpecialFolderLocation
is broken.
- New "router-status" line in directory, to better bind each verified
nickname to its identity key.
- Deprecate unofficial config option abbreviations, and abbreviations
not on the command line.
- Add a pure-C tor-resolve implementation.
- Use getrlimit and friends to ensure we can reach MaxConn (currently
1024) file descriptors.
o Code security improvements, inspired by Ilja:
- Replace sprintf with snprintf. (I think they were all safe, but
hey.)
- Replace strcpy/strncpy with strlcpy in more places.
- Avoid strcat; use snprintf or strlcat instead.
- snprintf wrapper with consistent (though not C99) overflow behavior.
Changes in version 0.0.9pre4 - 2004-10-17
o Bugfixes on 0.0.9pre3:
- If the server doesn't specify an exit policy, use the real default
exit policy, not reject *:*.
- Ignore fascistfirewall when uploading/downloading hidden service
descriptors, since we go through Tor for those; and when using
an HttpProxy, since we assume it can reach them all.
- When looking for an authoritative dirserver, use only the ones
configured at boot. Don't bother looking in the directory.
- The rest of the fix for get_default_conf_file() on older win32.
- Make 'Routerfile' config option obsolete.
o Features:
- New 'MyFamily nick1,...' config option for a server to
specify other servers that shouldn't be used in the same circuit
with it. Only believed if nick1 also specifies us.
- New 'NodeFamily nick1,nick2,...' config option for a client to
specify nodes that it doesn't want to use in the same circuit.
- New 'Redirectexit pattern address:port' config option for a
server to redirect exit connections, e.g. to a local squid.
Changes in version 0.0.9pre3 - 2004-10-13
o Bugfixes on 0.0.8.1:
- Better torrc example lines for dirbindaddress and orbindaddress.
- Improved bounds checking on parsed ints (e.g. config options and
the ones we find in directories.)
- Better handling of size_t vs int, so we're more robust on 64
bit platforms.
- Fix the rest of the bug where a newly started OR would appear
as unverified even after we've added his fingerprint and hupped
the dirserver.
- Fix a bug from 0.0.7: when read() failed on a stream, we would
close it without sending back an end. So 'connection refused'
would simply be ignored and the user would get no response.
o Bugfixes on 0.0.9pre2:
- Serving the cached-on-disk directory to people is bad. We now
provide no directory until we've fetched a fresh one.
- Workaround for bug on windows where cached-directories get crlf
corruption.
- Make get_default_conf_file() work on older windows too.
- If we write a *:* exit policy line in the descriptor, don't write
any more exit policy lines.
o Features:
- Use only 0.0.9pre1 and later servers for resolve cells.
- Make the dirservers file obsolete.
- Include a dir-signing-key token in directories to tell the
parsing entity which key is being used to sign.
- Remove the built-in bulky default dirservers string.
- New config option "Dirserver %s:%d [fingerprint]", which can be
repeated as many times as needed. If no dirservers specified,
default to moria1,moria2,tor26.
- Make moria2 advertise a dirport of 80, so people behind firewalls
will be able to get a directory.
- Http proxy support
- Dirservers translate requests for http://%s:%d/x to /x
- You can specify "HttpProxy %s[:%d]" and all dir fetches will
be routed through this host.
- Clients ask for /tor/x rather than /x for new enough dirservers.
This way we can one day coexist peacefully with apache.
- Clients specify a "Host: %s%d" http header, to be compatible
with more proxies, and so running squid on an exit node can work.
Changes in version 0.0.8.1 - 2004-10-13
o Bugfixes:
- Fix a seg fault that can be triggered remotely for Tor
clients/servers with an open dirport.
- Fix a rare assert trigger, where routerinfos for entries in
our cpath would expire while we're building the path.
- Fix a bug in OutboundBindAddress so it (hopefully) works.
- Fix a rare seg fault for people running hidden services on
intermittent connections.
- Fix a bug in parsing opt keywords with objects.
- Fix a stale pointer assert bug when a stream detaches and
reattaches.
- Fix a string format vulnerability (probably not exploitable)
in reporting stats locally.
- Fix an assert trigger: sometimes launching circuits can fail
immediately, e.g. because too many circuits have failed recently.
- Fix a compile warning on 64 bit platforms.
Changes in version 0.0.9pre2 - 2004-10-03
o Bugfixes:
- Make fetching a cached directory work for 64-bit platforms too.
- Make zlib.h a required header, not an optional header.
Changes in version 0.0.9pre1 - 2004-10-01
o Bugfixes:
- Stop using separate defaults for no-config-file and
empty-config-file. Now you have to explicitly turn off SocksPort,
if you don't want it open.
- Fix a bug in OutboundBindAddress so it (hopefully) works.
- Improve man page to mention more of the 0.0.8 features.
- Fix a rare seg fault for people running hidden services on
intermittent connections.
- Change our file IO stuff (especially wrt OpenSSL) so win32 is
happier.
- Fix more dns related bugs: send back resolve_failed and end cells
more reliably when the resolve fails, rather than closing the
circuit and then trying to send the cell. Also attach dummy resolve
connections to a circuit *before* calling dns_resolve(), to fix
a bug where cached answers would never be sent in RESOLVED cells.
- When we run out of disk space, or other log writing error, don't
crash. Just stop logging to that log and continue.
- We were starting to daemonize before we opened our logs, so if
there were any problems opening logs, we would complain to stderr,
which wouldn't work, and then mysteriously exit.
- Fix a rare bug where sometimes a verified OR would connect to us
before he'd uploaded his descriptor, which would cause us to
assign conn->nickname as though he's unverified. Now we look through
the fingerprint list to see if he's there.
- Fix a rare assert trigger, where routerinfos for entries in
our cpath would expire while we're building the path.
o Features:
- Clients can ask dirservers for /dir.z to get a compressed version
of the directory. Only works for servers running 0.0.9, of course.
- Make clients cache directories and use them to seed their router
lists at startup. This means clients have a datadir again.
- Configuration infrastructure support for warning on obsolete
options.
- Respond to content-encoding headers by trying to uncompress as
appropriate.
- Reply with a deflated directory when a client asks for "dir.z".
We could use allow-encodings instead, but allow-encodings isn't
specified in HTTP 1.0.
- Raise the max dns workers from 50 to 100.
- Discourage people from setting their dirfetchpostperiod more often
than once per minute.
- Protect dirservers from overzealous descriptor uploading -- wait
10 seconds after directory gets dirty, before regenerating.
Changes in version 0.0.8 - 2004-08-25
o Port it to SunOS 5.9 / Athena
Changes in version 0.0.8rc2 - 2004-08-20
o Make it compile on cygwin again.
o When picking unverified routers, skip those with low uptime and/or
low bandwidth, depending on what properties you care about.
Changes in version 0.0.8rc1 - 2004-08-18
o Changes from 0.0.7.3:
- Bugfixes:
- Fix assert triggers: if the other side returns an address 0.0.0.0,
don't put it into the client dns cache.
- If a begin failed due to exit policy, but we believe the IP address
should have been allowed, switch that router to exitpolicy reject *:*
until we get our next directory.
- Features:
- Clients choose nodes proportional to advertised bandwidth.
- Avoid using nodes with low uptime as introduction points.
- Handle servers with dynamic IP addresses: don't replace
options->Address with the resolved one at startup, and
detect our address right before we make a routerinfo each time.
- 'FascistFirewall' option to pick dirservers and ORs on specific
ports; plus 'FirewallPorts' config option to tell FascistFirewall
which ports are open. (Defaults to 80,443)
- Be more aggressive about trying to make circuits when the network
has changed (e.g. when you unsuspend your laptop).
- Check for time skew on http headers; report date in response to
"GET /".
- If the entrynode config line has only one node, don't pick it as
an exitnode.
- Add strict{entry|exit}nodes config options. If set to 1, then
we refuse to build circuits that don't include the specified entry
or exit nodes.
- OutboundBindAddress config option, to bind to a specific
IP address for outgoing connect()s.
- End truncated log entries (e.g. directories) with "[truncated]".
o Patches to 0.0.8preX:
- Bugfixes:
- Patches to compile and run on win32 again (maybe)?
- Fix crash when looking for ~/.torrc with no $HOME set.
- Fix a race bug in the unit tests.
- Handle verified/unverified name collisions better when new
routerinfo's arrive in a directory.
- Sometimes routers were getting entered into the stats before
we'd assigned their identity_digest. Oops.
- Only pick and establish intro points after we've gotten a
directory.
- Features:
- AllowUnverifiedNodes config option to let circuits choose no-name
routers in entry,middle,exit,introduction,rendezvous positions.
Allow middle and rendezvous positions by default.
- Add a man page for tor-resolve.
Changes in version 0.0.7.3 - 2004-08-12
o Stop dnsworkers from triggering an assert failure when you
ask them to resolve the host "".
Changes in version 0.0.8pre3 - 2004-08-09
o Changes from 0.0.7.2:
- Allow multiple ORs with same nickname in routerlist -- now when
people give us one identity key for a nickname, then later
another, we don't constantly complain until the first expires.
- Remember used bandwidth (both in and out), and publish 15-minute
snapshots for the past day into our descriptor.
- You can now fetch $DIRURL/running-routers to get just the
running-routers line, not the whole descriptor list. (But
clients don't use this yet.)
- When people mistakenly use Tor as an http proxy, point them
at the tor-doc.html rather than the INSTALL.
- Remove our mostly unused -- and broken -- hex_encode()
function. Use base16_encode() instead. (Thanks to Timo Lindfors
for pointing out this bug.)
- Rotate onion keys every 12 hours, not every 2 hours, so we have
fewer problems with people using the wrong key.
- Change the default exit policy to reject the default edonkey,
kazaa, gnutella ports.
- Add replace_file() to util.[ch] to handle win32's rename().
o Changes from 0.0.8preX:
- Fix two bugs in saving onion keys to disk when rotating, so
hopefully we'll get fewer people using old onion keys.
- Fix an assert error that was making SocksPolicy not work.
- Be willing to expire routers that have an open dirport -- it's
just the authoritative dirservers we want to not forget.
- Reject tor-resolve requests for .onion addresses early, so we
don't build a whole rendezvous circuit and then fail.
- When you're warning a server that he's unverified, don't cry
wolf unpredictably.
- Fix a race condition: don't try to extend onto a connection
that's still handshaking.
- For servers in clique mode, require the conn to be open before
you'll choose it for your path.
- Fix some cosmetic bugs about duplicate mark-for-close, lack of
end relay cell, etc.
- Measure bandwidth capacity over the last 24 hours, not just 12
- Bugfix: authoritative dirservers were making and signing a new
directory for each client, rather than reusing the cached one.
Changes in version 0.0.8pre2 - 2004-08-04
o Changes from 0.0.7.2:
- Security fixes:
- Check directory signature _before_ you decide whether you're
you're running an obsolete version and should exit.
- Check directory signature _before_ you parse the running-routers
list to decide who's running or verified.
- Bugfixes and features:
- Check return value of fclose while writing to disk, so we don't
end up with broken files when servers run out of disk space.
- Log a warning if the user uses an unsafe socks variant, so people
are more likely to learn about privoxy or socat.
- Dirservers now include RFC1123-style dates in the HTTP headers,
which one day we will use to better detect clock skew.
o Changes from 0.0.8pre1:
- Make it compile without warnings again on win32.
- Log a warning if you're running an unverified server, to let you
know you might want to get it verified.
- Only pick a default nickname if you plan to be a server.
Changes in version 0.0.8pre1 - 2004-07-23
o Bugfixes:
- Made our unit tests compile again on OpenBSD 3.5, and tor
itself compile again on OpenBSD on a sparc64.
- We were neglecting milliseconds when logging on win32, so
everything appeared to happen at the beginning of each second.
o Protocol changes:
- 'Extend' relay cell payloads now include the digest of the
intended next hop's identity key. Now we can verify that we're
extending to the right router, and also extend to routers we
hadn't heard of before.
o Features:
- Tor nodes can now act as relays (with an advertised ORPort)
without being manually verified by the dirserver operators.
- Uploaded descriptors of unverified routers are now accepted
by the dirservers, and included in the directory.
- Verified routers are listed by nickname in the running-routers
list; unverified routers are listed as "$<fingerprint>".
- We now use hash-of-identity-key in most places rather than
nickname or addr:port, for improved security/flexibility.
- To avoid Sybil attacks, paths still use only verified servers.
But now we have a chance to play around with hybrid approaches.
- Nodes track bandwidth usage to estimate capacity (not used yet).
- ClientOnly option for nodes that never want to become servers.
- Directory caching.
- "AuthoritativeDir 1" option for the official dirservers.
- Now other nodes (clients and servers) will cache the latest
directory they've pulled down.
- They can enable their DirPort to serve it to others.
- Clients will pull down a directory from any node with an open
DirPort, and check the signature/timestamp correctly.
- Authoritative dirservers now fetch directories from other
authdirservers, to stay better synced.
- Running-routers list tells who's down also, along with noting
if they're verified (listed by nickname) or unverified (listed
by hash-of-key).
- Allow dirservers to serve running-router list separately.
This isn't used yet.
- ORs connect-on-demand to other ORs
- If you get an extend cell to an OR you're not connected to,
connect, handshake, and forward the create cell.
- The authoritative dirservers stay connected to everybody,
and everybody stays connected to 0.0.7 servers, but otherwise
clients/servers expire unused connections after 5 minutes.
- When servers get a sigint, they delay 30 seconds (refusing new
connections) then exit. A second sigint causes immediate exit.
- File and name management:
- Look for .torrc if no CONFDIR "torrc" is found.
- If no datadir is defined, then choose, make, and secure ~/.tor
as datadir.
- If torrc not found, exitpolicy reject *:*.
- Expands ~/ in filenames to $HOME/ (but doesn't yet expand ~arma).
- If no nickname is defined, derive default from hostname.
- Rename secret key files, e.g. identity.key -> secret_id_key,
to discourage people from mailing their identity key to tor-ops.
- Refuse to build a circuit before the directory has arrived --
it won't work anyway, since you won't know the right onion keys
to use.
- Try other dirservers immediately if the one you try is down. This
should tolerate down dirservers better now.
- Parse tor version numbers so we can do an is-newer-than check
rather than an is-in-the-list check.
- New socks command 'resolve', to let us shim gethostbyname()
locally.
- A 'tor_resolve' script to access the socks resolve functionality.
- A new socks-extensions.txt doc file to describe our
interpretation and extensions to the socks protocols.
- Add a ContactInfo option, which gets published in descriptor.
- Publish OR uptime in descriptor (and thus in directory) too.
- Write tor version at the top of each log file
- New docs in the tarball:
- tor-doc.html.
- Document that you should proxy your SSL traffic too.
Changes in version 0.0.7.2 - 2004-07-07
o A better fix for the 0.0.0.0 problem, that will hopefully
eliminate the remaining related assertion failures.
Changes in version 0.0.7.1 - 2004-07-04
o When an address resolves to 0.0.0.0, treat it as a failed resolve,
since internally we use 0.0.0.0 to signify "not yet resolved".
Changes in version 0.0.7 - 2004-06-07
o Updated the man page to reflect the new features.
Changes in version 0.0.7rc2 - 2004-06-06
o Changes from 0.0.7rc1:
- Make it build on Win32 again.
o Changes from 0.0.6.2:
- Rotate dnsworkers and cpuworkers on SIGHUP, so they get new config
settings too.
Changes in version 0.0.7rc1 - 2004-06-02
o Bugfixes:
- On sighup, we were adding another log without removing the first
one. So log messages would get duplicated n times for n sighups.
- Several cases of using a connection after we'd freed it. The
problem was that connections that are pending resolve are in both
the pending_resolve tree, and also the circuit's resolving_streams
list. When you want to remove one, you must remove it from both.
- Fix a double-mark-for-close where an end cell arrived for a
resolving stream, and then the resolve failed.
- Check directory signatures based on name of signer, not on whom
we got the directory from. This will let us cache directories more
easily.
o Features:
- Crank up some of our constants to handle more users.
Changes in version 0.0.7pre1 - 2004-06-02
o Fixes for crashes and other obnoxious bugs:
- Fix an epipe bug: sometimes when directory connections failed
to connect, we would give them a chance to flush before closing
them.
- When we detached from a circuit because of resolvefailed, we
would immediately try the same circuit twice more, and then
give up on the resolve thinking we'd tried three different
exit nodes.
- Limit the number of intro circuits we'll attempt to build for a
hidden service per 15-minute period.
- Check recommended-software string *early*, before actually parsing
the directory. Thus we can detect an obsolete version and exit,
even if the new directory format doesn't parse.
o Fixes for security bugs:
- Remember which nodes are dirservers when you startup, and if a
random OR enables his dirport, don't automatically assume he's
a trusted dirserver.
o Other bugfixes:
- Directory connections were asking the wrong poll socket to
start writing, and not asking themselves to start writing.
- When we detached from a circuit because we sent a begin but
didn't get a connected, we would use it again the first time;
but after that we would correctly switch to a different one.
- Stop warning when the first onion decrypt attempt fails; they
will sometimes legitimately fail now that we rotate keys.
- Override unaligned-access-ok check when $host_cpu is ia64 or
arm. Apparently they allow it but the kernel whines.
- Dirservers try to reconnect periodically too, in case connections
have failed.
- Fix some memory leaks in directory servers.
- Allow backslash in Win32 filenames.
- Made Tor build complain-free on FreeBSD, hopefully without
breaking other BSD builds. We'll see.
o Features:
- Doxygen markup on all functions and global variables.
- Make directory functions update routerlist, not replace it. So
now directory disagreements are not so critical a problem.
- Remove the upper limit on number of descriptors in a dirserver's
directory (not that we were anywhere close).
- Allow multiple logfiles at different severity ranges.
- Allow *BindAddress to specify ":port" rather than setting *Port
separately. Allow multiple instances of each BindAddress config
option, so you can bind to multiple interfaces if you want.
- Allow multiple exit policy lines, which are processed in order.
Now we don't need that huge line with all the commas in it.
- Enable accept/reject policies on SOCKS connections, so you can bind
to 0.0.0.0 but still control who can use your OP.
Changes in version 0.0.6.2 - 2004-05-16
o Our integrity-checking digest was checking only the most recent cell,
not the previous cells like we'd thought.
Thanks to Stefan Mark for finding the flaw!
Changes in version 0.0.6.1 - 2004-05-06
o Fix two bugs in our AES counter-mode implementation (this affected
onion-level stream encryption, but not TLS-level). It turns
out we were doing something much more akin to a 16-character
polyalphabetic cipher. Oops.
Thanks to Stefan Mark for finding the flaw!
o Retire moria3 as a directory server, and add tor26 as a directory
server.
Changes in version 0.0.6 - 2004-05-02
[version bump only]
Changes in version 0.0.6rc4 - 2004-05-01
o Update the built-in dirservers list to use the new directory format
o Fix a rare seg fault: if a node offering a hidden service attempts
to build a circuit to Alice's rendezvous point and fails before it
reaches the last hop, it retries with a different circuit, but
then dies.
o Handle windows socket errors correctly.
Changes in version 0.0.6rc3 - 2004-04-28
o Don't expire non-general excess circuits (if we had enough
circuits open, we were expiring rendezvous circuits -- even
when they had a stream attached. oops.)
o Fetch randomness from /dev/urandom better (not via fopen/fread)
o Better debugging for tls errors
o Some versions of openssl have an SSL_pending function that erroneously
returns bytes when there is a non-application record pending.
o Set Content-Type on the directory and hidserv descriptor.
o Remove IVs from cipher code, since AES-ctr has none.
o Win32 fixes. Tor now compiles on win32 with no warnings/errors.
o We were using an array of length zero in a few places.
o win32's gethostbyname can't resolve an IP to an IP.
o win32's close can't close a socket.
Changes in version 0.0.6rc2 - 2004-04-26
o Fix a bug where we were closing tls connections intermittently.
It turns out openssl keeps its errors around -- so if an error
happens, and you don't ask about it, and then another openssl
operation happens and succeeds, and you ask if there was an error,
it tells you about the first error. Fun fun.
o Fix a bug that's been lurking since 27 may 03 (!)
When passing back a destroy cell, we would use the wrong circ id.
'Mostly harmless', but still worth fixing.
o Since we don't support truncateds much, don't bother sending them;
just close the circ.
o check for <machine/limits.h> so we build on NetBSD again (I hope).
o don't crash if a conn that sent a begin has suddenly lost its circuit
(this was quite rare).
Changes in version 0.0.6rc1 - 2004-04-25
o We now rotate link (tls context) keys and onion keys.
o CREATE cells now include oaep padding, so you can tell
if you decrypted them correctly.
o Add bandwidthburst to server descriptor.
o Directories now say which dirserver signed them.
o Use a tor_assert macro that logs failed assertions too.
Changes in version 0.0.6pre5 - 2004-04-18
o changes from 0.0.6pre4:
- make tor build on broken freebsd 5.2 installs
- fix a failed assert when you try an intro point, get a nack, and try
a second one and it works.
- when alice uses a port that the hidden service doesn't accept,
it now sends back an end cell (denied by exit policy). otherwise
alice would just have to wait to time out.
- fix another rare bug: when we had tried all the intro
points for a hidden service, we fetched the descriptor
again, but we left our introcirc thinking it had already
sent an intro, so it kept waiting for a response...
- bugfix: when you sleep your hidden-service laptop, as soon
as it wakes up it tries to upload a service descriptor, but
socketpair fails for some reason (localhost not up yet?).
now we simply give up on that upload, and we'll try again later.
i'd still like to find the bug though.
- if an intro circ waiting for an ack dies before getting one, then
count it as a nack
- we were reusing stale service descriptors and refetching usable
ones. oops.
Changes in version 0.0.6pre4 - 2004-04-14
o changes from 0.0.6pre3:
- when bob fails to connect to the rendezvous point, and his
circ didn't fail because of the rendezvous point itself, then
he retries a couple of times
- we expire introduction and rendezvous circs more thoroughly
(sometimes they were hanging around forever)
- we expire unattached rendezvous streams that have been around
too long (they were sticking around forever).
- fix a measly fencepost error that was crashing everybody with
a strict glibc.
Changes in version 0.0.6pre3 - 2004-04-14
o changes from 0.0.6pre2:
- make hup work again
- fix some memory leaks for dirservers
- allow more skew in rendezvous descriptor timestamps, to help
handle people like blanu who don't know what time it is
- normal circs are 3 hops, but some rend/intro circs are 4, if
the initiator doesn't get to choose the last hop
- send acks for introductions, so alice can know whether to try
again
- bob publishes intro points more correctly
o changes from 0.0.5:
- fix an assert trigger that's been plaguing us since the days
of 0.0.2prexx (thanks weasel!)
- retry stream correctly when we fail to connect because of
exit-policy-reject (should try another) or can't-resolve-address
(also should try another, because dns on random internet servers
is flaky).
- when we hup a dirserver and we've *removed* a server from the
approved-routers list, now we remove that server from the
in-memory directories too
Changes in version 0.0.6pre2 - 2004-04-08
o We fixed our base32 implementation. Now it works on all architectures.
Changes in version 0.0.6pre1 - 2004-04-08
o Features:
- Hidden services and rendezvous points are implemented. Go to
http://6sxoyfb3h2nvok2d.onion/ for an index of currently available
hidden services. (This only works via a socks4a proxy such as
Privoxy, and currently it's quite slow.)
Changes in version 0.0.5 - 2004-03-30
[version bump only]
Changes in version 0.0.5rc3 - 2004-03-29
o Install torrc as torrc.sample -- we no longer clobber your
torrc. (Woo!)
o Re-enable recommendedversion checking (we broke it in rc2, oops)
o Add in a 'notice' log level for things the operator should hear
but that aren't warnings
Changes in version 0.0.5rc2 - 2004-03-29
o Hold socks connection open until reply is flushed (if possible)
o Make exit nodes resolve IPs to IPs immediately, rather than asking
the dns farm to do it.
o Fix c99 aliasing warnings in rephist.c
o Don't include server descriptors that are older than 24 hours in the
directory.
o Give socks 'reject' replies their whole 15s to attempt to flush,
rather than seeing the 60s timeout and assuming the flush had failed.
o Clean automake droppings from the cvs repository
Changes in version 0.0.5rc1 - 2004-03-28
o Fix mangled-state bug in directory fetching (was causing sigpipes).
o Only build circuits after we've fetched the directory: clients were
using only the directory servers before they'd fetched a directory.
This also means longer startup time; so it goes.
o Fix an assert trigger where an OP would fail to handshake, and we'd
expect it to have a nickname.
o Work around a tsocks bug: do a socks reject when AP connection dies
early, else tsocks goes into an infinite loop.
Changes in version 0.0.4 - 2004-03-26
o When connecting to a dirserver or OR and the network is down,
we would crash.
Changes in version 0.0.3 - 2004-03-26
o Warn and fail if server chose a nickname with illegal characters
o Port to Solaris and Sparc:
- include missing header fcntl.h
- have autoconf find -lsocket -lnsl automatically
- deal with hardware word alignment
- make uname() work (solaris has a different return convention)
- switch from using signal() to sigaction()
o Preliminary work on reputation system:
- Keep statistics on success/fail of connect attempts; they're published
by kill -USR1 currently.
- Add a RunTesting option to try to learn link state by creating test
circuits, even when SocksPort is off.
- Remove unused open circuits when there are too many.
Changes in version 0.0.2 - 2004-03-19
- Include strlcpy and strlcat for safer string ops
- define INADDR_NONE so we compile (but still not run) on solaris
Changes in version 0.0.2pre27 - 2004-03-14
o Bugfixes:
- Allow internal tor networks (we were rejecting internal IPs,
now we allow them if they're set explicitly).
- And fix a few endian issues.
Changes in version 0.0.2pre26 - 2004-03-14
o New features:
- If a stream times out after 15s without a connected cell, don't
try that circuit again: try a new one.
- Retry streams at most 4 times. Then give up.
- When a dirserver gets a descriptor from an unknown router, it
logs its fingerprint (so the dirserver operator can choose to
accept it even without mail from the server operator).
- Inform unapproved servers when we reject their descriptors.
- Make tor build on Windows again. It works as a client, who knows
about as a server.
- Clearer instructions in the torrc for how to set up a server.
- Be more efficient about reading fd's when our global token bucket
(used for rate limiting) becomes empty.
o Bugfixes:
- Stop asserting that computers always go forward in time. It's
simply not true.
- When we sent a cell (e.g. destroy) and then marked an OR connection
expired, we might close it before finishing a flush if the other
side isn't reading right then.
- Don't allow dirservers to start if they haven't defined
RecommendedVersions
- We were caching transient dns failures. Oops.
- Prevent servers from publishing an internal IP as their address.
- Address a strcat vulnerability in circuit.c
Changes in version 0.0.2pre25 - 2004-03-04
o New features:
- Put the OR's IP in its router descriptor, not its fqdn. That way
we'll stop being stalled by gethostbyname for nodes with flaky dns,
e.g. poblano.
o Bugfixes:
- If the user typed in an address that didn't resolve, the server
crashed.
Changes in version 0.0.2pre24 - 2004-03-03
o Bugfixes:
- Fix an assertion failure in dns.c, where we were trying to dequeue
a pending dns resolve even if it wasn't pending
- Fix a spurious socks5 warning about still trying to write after the
connection is finished.
- Hold certain marked_for_close connections open until they're finished
flushing, rather than losing bytes by closing them too early.
- Correctly report the reason for ending a stream
- Remove some duplicate calls to connection_mark_for_close
- Put switch_id and start_daemon earlier in the boot sequence, so it
will actually try to chdir() to options.DataDirectory
- Make 'make test' exit(1) if a test fails; fix some unit tests
- Make tor fail when you use a config option it doesn't know about,
rather than warn and continue.
- Make --version work
- Bugfixes on the rpm spec file and tor.sh, so it's more up to date
Changes in version 0.0.2pre23 - 2004-02-29
o New features:
- Print a statement when the first circ is finished, so the user
knows it's working.
- If a relay cell is unrecognized at the end of the circuit,
send back a destroy. (So attacks to mutate cells are more
clearly thwarted.)
- New config option 'excludenodes' to avoid certain nodes for circuits.
- When it daemonizes, it chdir's to the DataDirectory rather than "/",
so you can collect coredumps there.
o Bugfixes:
- Fix a bug in tls flushing where sometimes data got wedged and
didn't flush until more data got sent. Hopefully this bug was
a big factor in the random delays we were seeing.
- Make 'connected' cells include the resolved IP, so the client
dns cache actually gets populated.
- Disallow changing from ORPort=0 to ORPort>0 on hup.
- When we time-out on a stream and detach from the circuit, send an
end cell down it first.
- Only warn about an unknown router (in exitnodes, entrynodes,
excludenodes) after we've fetched a directory.
Changes in version 0.0.2pre22 - 2004-02-26
o New features:
- Servers publish less revealing uname information in descriptors.
- More memory tracking and assertions, to crash more usefully when
errors happen.
- If the default torrc isn't there, just use some default defaults.
Plus provide an internal dirservers file if they don't have one.
- When the user tries to use Tor as an http proxy, give them an http
501 failure explaining that we're a socks proxy.
- Dump a new router.desc on hup, to help confused people who change
their exit policies and then wonder why router.desc doesn't reflect
it.
- Clean up the generic tor.sh init script that we ship with.
o Bugfixes:
- If the exit stream is pending on the resolve, and a destroy arrives,
then the stream wasn't getting removed from the pending list. I
think this was the one causing recent server crashes.
- Use a more robust poll on OSX 10.3, since their poll is flaky.
- When it couldn't resolve any dirservers, it was useless from then on.
Now it reloads the RouterFile (or default dirservers) if it has no
dirservers.
- Move the 'tor' binary back to /usr/local/bin/ -- it turns out
many users don't even *have* a /usr/local/sbin/.
Changes in version 0.0.2pre21 - 2004-02-18
o New features:
- There's a ChangeLog file that actually reflects the changelog.
- There's a 'torify' wrapper script, with an accompanying
tor-tsocks.conf, that simplifies the process of using tsocks for
tor. It even has a man page.
- The tor binary gets installed to sbin rather than bin now.
- Retry streams where the connected cell hasn't arrived in 15 seconds
- Clean up exit policy handling -- get the default out of the torrc,
so we can update it without forcing each server operator to fix
his/her torrc.
- Allow imaps and pop3s in default exit policy
o Bugfixes:
- Prevent picking middleman nodes as the last node in the circuit
Changes in version 0.0.2pre20 - 2004-01-30
o New features:
- We now have a deb package, and it's in debian unstable. Go to
it, apt-getters. :)
- I've split the TotalBandwidth option into BandwidthRate (how many
bytes per second you want to allow, long-term) and
BandwidthBurst (how many bytes you will allow at once before the cap
kicks in). This better token bucket approach lets you, say, set
BandwidthRate to 10KB/s and BandwidthBurst to 10MB, allowing good
performance while not exceeding your monthly bandwidth quota.
- Push out a tls record's worth of data once you've got it, rather
than waiting until you've read everything waiting to be read. This
may improve performance by pipelining better. We'll see.
- Add an AP_CONN_STATE_CONNECTING state, to allow streams to detach
from failed circuits (if they haven't been connected yet) and attach
to new ones.
- Expire old streams that haven't managed to connect. Some day we'll
have them reattach to new circuits instead.
o Bugfixes:
- Fix several memory leaks that were causing servers to become bloated
after a while.
- Fix a few very rare assert triggers. A few more remain.
- Setuid to User _before_ complaining about running as root.
Changes in version 0.0.2pre19 - 2004-01-07
o Bugfixes:
- Fix deadlock condition in dns farm. We were telling a child to die by
closing the parent's file descriptor to him. But newer children were
inheriting the open file descriptor from the parent, and since they
weren't closing it, the socket never closed, so the child never read
eof, so he never knew to exit. Similarly, dns workers were holding
open other sockets, leading to all sorts of chaos.
- New cleaner daemon() code for forking and backgrounding.
- If you log to a file, it now prints an entry at the top of the
logfile so you know it's working.
- The onionskin challenge length was 30 bytes longer than necessary.
- Started to patch up the spec so it's not quite so out of date.
Changes in version 0.0.2pre18 - 2004-01-02
o Bugfixes:
- Fix endian issues with the 'integrity' field in the relay header.
- Fix a potential bug where connections in state
AP_CONN_STATE_CIRCUIT_WAIT might unexpectedly ask to write.
Changes in version 0.0.2pre17 - 2003-12-30
o Bugfixes:
- Made --debuglogfile (or any second log file, actually) work.
- Resolved an edge case in get_unique_circ_id_by_conn where a smart
adversary could force us into an infinite loop.
o Features:
- Each onionskin handshake now includes a hash of the computed key,
to prove the server's identity and help perfect forward secrecy.
- Changed cell size from 256 to 512 bytes (working toward compatibility
with MorphMix).
- Changed cell length to 2 bytes, and moved it to the relay header.
- Implemented end-to-end integrity checking for the payloads of
relay cells.
- Separated streamid from 'recognized' (otherwise circuits will get
messed up when we try to have streams exit from the middle). We
use the integrity-checking to confirm that a cell is addressed to
this hop.
- Randomize the initial circid and streamid values, so an adversary who
breaks into a node can't learn how many circuits or streams have
been made so far.
Changes in version 0.0.2pre16 - 2003-12-14
o Bugfixes:
- Fixed a bug that made HUP trigger an assert
- Fixed a bug where a circuit that immediately failed wasn't being
counted as a failed circuit in counting retries.
o Features:
- Now we close the circuit when we get a truncated cell: otherwise we're
open to an anonymity attack where a bad node in the path truncates
the circuit and then we open streams at him.
- Add port ranges to exit policies
- Add a conservative default exit policy
- Warn if you're running tor as root
- on HUP, retry OR connections and close/rebind listeners
- options.EntryNodes: try these nodes first when picking the first node
- options.ExitNodes: if your best choices happen to include any of
your preferred exit nodes, you choose among just those preferred
exit nodes.
- options.ExcludedNodes: nodes that are never picked in path building
Changes in version 0.0.2pre15 - 2003-12-03
o Robustness and bugfixes:
- Sometimes clients would cache incorrect DNS resolves, which would
really screw things up.
- An OP that goes offline would slowly leak all its sockets and stop
working.
- A wide variety of bugfixes in exit node selection, exit policy
handling, and processing pending streams when a new circuit is
established.
- Pick nodes for a path only from those the directory says are up
- Choose randomly from all running dirservers, not always the first one
- Increase allowed http header size for directory fetch.
- Stop writing to stderr (if we're daemonized it will be closed).
- Enable -g always, so cores will be more useful to me.
- Switch "-lcrypto -lssl" to "-lssl -lcrypto" for broken distributions.
o Documentation:
- Wrote a man page. It lists commonly used options.
o Configuration:
- Change default loglevel to warn.
- Make PidFile default to null rather than littering in your CWD.
- OnionRouter config option is now obsolete. Instead it just checks
ORPort>0.
- Moved to a single unified torrc file for both clients and servers.
Changes in version 0.0.2pre14 - 2003-11-29
o Robustness and bugfixes:
- Force the admin to make the DataDirectory himself
- to get ownership/permissions right
- so clients no longer make a DataDirectory and then never use it
- fix bug where a client who was offline for 45 minutes would never
pull down a directory again
- fix (or at least hide really well) the dns assert bug that was
causing server crashes
- warnings and improved robustness wrt clockskew for certs
- use the native daemon(3) to daemonize, when available
- exit if bind() fails
- exit if neither socksport nor orport is defined
- include our own tor_timegm (Win32 doesn't have its own)
- bugfix for win32 with lots of connections
- fix minor bias in PRNG
- make dirserver more robust to corrupt cached directory
o Documentation:
- Wrote the design document (woo)
o Circuit building and exit policies:
- Circuits no longer try to use nodes that the directory has told them
are down.
- Exit policies now support bitmasks (18.0.0.0/255.0.0.0) and
bitcounts (18.0.0.0/8).
- Make AP connections standby for a circuit if no suitable circuit
exists, rather than failing
- Circuits choose exit node based on addr/port, exit policies, and
which AP connections are standing by
- Bump min pathlen from 2 to 3
- Relay end cells have a payload to describe why the stream ended.
- If the stream failed because of exit policy, try again with a new
circuit.
- Clients have a dns cache to remember resolved addresses.
- Notice more quickly when we have no working circuits
o Configuration:
- APPort is now called SocksPort
- SocksBindAddress, ORBindAddress, DirBindAddress let you configure
where to bind
- RecommendedVersions is now a config variable rather than
hardcoded (for dirservers)
- Reloads config on HUP
- Usage info on -h or --help
- If you set User and Group config vars, it'll setu/gid to them.
Changes in version 0.0.2pre13 - 2003-10-19
o General stability:
- SSL_write no longer fails when it returns WANTWRITE and the number
of bytes in the buf has changed by the next SSL_write call.
- Fix segfault fetching directory when network is down
- Fix a variety of minor memory leaks
- Dirservers reload the fingerprints file on HUP, so I don't have
to take down the network when I approve a new router
- Default server config file has explicit Address line to specify fqdn
o Buffers:
- Buffers grow and shrink as needed (Cut process size from 20M to 2M)
- Make listener connections not ever alloc bufs
o Autoconf improvements:
- don't clobber an external CFLAGS in ./configure
- Make install now works
- create var/lib/tor on make install
- autocreate a tor.sh initscript to help distribs
- autocreate the torrc and sample-server-torrc with correct paths
o Log files and Daemonizing now work:
- If --DebugLogFile is specified, log to it at -l debug
- If --LogFile is specified, use it instead of commandline
- If --RunAsDaemon is set, tor forks and backgrounds on startup