If set to 1, Tor will attempt to prevent basic debugging
attachment attempts by other processes. (Default: 1)
Supports Mac OS X and Gnu/Linux.
Sebastian provided useful feedback and refactoring suggestions.
Signed-off-by: Jacob Appelbaum <jacob@appelbaum.net>
When running a system-wide instance of Tor on Unix-like systems, having
a ControlSocket is a quite handy mechanism to access Tor control
channel. But it would be easier if access to the Unix domain socket can
be granted by making control users members of the group running the Tor
process.
This change introduces a UnixSocketsGroupWritable option, which will
create Unix domain sockets (and thus ControlSocket) 'g+rw'. This allows
ControlSocket to offer same access control measures than
ControlPort+CookieAuthFileGroupReadable.
See <http://bugs.debian.org/552556> for more details.
Clients and relays haven't used them since early 0.2.0.x. The only
remaining use by authorities learning about new relays ahead of scedule;
see proposal 147 for what we intend to do about that.
We're leaving in an option (FetchV2Networkstatus) to manually fetch v2
networkstatuses, because apparently dnsel and maybe bwauth want them.
This fixes bug 3022.
Resolved conflicts in:
doc/tor.1.txt
src/or/circuitbuild.c
src/or/circuituse.c
src/or/connection_edge.c
src/or/connection_edge.h
src/or/directory.c
src/or/rendclient.c
src/or/routerlist.c
src/or/routerlist.h
These were mostly releated to the routerinfo_t->node_t conversion.
- Document it in the manpage
- Add a changes entry
- No need to log when it is set: we don't log for other options.
- Use doxygen to document the new flag.
- Test truth of C variables with "if (x)", not "if (x == 1)".
- Simplify a complex boolean expression by breaking it up.
Sets:
* Documentation
* Logging domain
* Configuration option
* Scheduled event
* Makefile
It also creates status.c and the log_heartbeat() function.
All code was written by Sebastian Hahn. Commit message was
written by me (George Kadianakis).
We detect and reject said attempts if there is no chosen exit node or
circuit: connecting to a private addr via a randomly chosen exit node
will usually fail (if all exits reject private addresses), is always
ill-defined (you're not asking for any particular host or service),
and usually an error (you've configured all requests to go over Tor
when you really wanted to configure all _remote_ requests to go over
Tor).
This can also help detect forwarding loop requests.
Found as part of bug2279.
Previously if you wanted to say "All messages except network
messages", you needed to say "[*,~net]" and if you said "[~net]" by
mistake, you would get no messages at all. Now, if you say "[~net]",
you get everything except networking messages.
We need to make sure that the worst thing that a weird consensus param
can do to us is to break our Tor (and only if the other Tors are
reliably broken in the same way) so that the majority of directory
authorities can't pull any attacks that are worse than the DoS that
they can trigger by simply shutting down.
One of these worse things was the cbtnummodes parameter, which could
lead to heap corruption on some systems if the value was sufficiently
large.
This commit fixes this particular issue and also introduces sanity
checking for all consensus parameters.
This was originally a patch provided by pipe
(http://www.mail-archive.com/or-talk@freehaven.net/msg13085.html) to
provide a method for controllers to query the total amount of traffic
tor has handled (this is a frequently requested piece of information
by relay operators).
The spec stated that support for the helper-nodes command would be removed
in 0.1.3.x, however support for this command is still in Tor. Updated the spec
to reflect this and added a node that the command is deprecated.
Several updates to grammars for events and GETINFO results. All relate
to the fact that LongName has replaced ServerID since 0.2.2.1-alpha. See
documentation of VERBOSE_NAMES for more information. The following
grammars were changed:
* orconn-status GETINFO result
* entry-guards GETINFO result
* Path general token
* OR Connection status changed event
* New descriptors available event
In all cases a note was added about when the old grammar applies.
(1) Made the wording of the comments consistant with token names.
Digest/Fingerprint and Name/Nickname were being used interchangeably.
Better to just use Fingerprint and Nickname becuase they are the names
of the tokens.
(2) Places the tokens currently in use before the tokens used in older
versions. ServerSpec should be documented before ServerID.
(3) Added a note to the comments about ServerID that cross reference
the VERBOSE_FEATURE, allowing users to see when and why ServerID was
replaced with LongName.
(1) On by default is a bad way to describe features. Rather, they
are always on and should be viewed as a part of the control
protocol. Updated the wording in USEFEATURE to reflect this.
(2) Made descriptions of Tor versions consistant across all
features. There is the version in which a feature was introduced and
the version in which it became part of the protocol.
(3) Reworded the description of the VERBOSE_NAMES feature. The
previous wording describes the way things used to be first. Better to
lead with the current state of things and then describe how it differs
from old versions.
Having very long single lines with lots and lots of things in them
tends to make files hard to diff and hard to merge. Since our tools
are one-line-at-a-time, we should try to construct lists that way too,
within reason.
This incidentally turned up a few headers in configure.in that we were
for some reason searching for twice.
We decided to no longer ship expert packages for OS X because they're a
lot of trouble to keep maintained and confuse users. For those who want
a tor on OS X without Vidalia, macports is a fine option. Alternatively,
building from source is easy, too.
The polipo stuff that is still required for the Vidalia bundle build can
now be found in the torbrowser repository,
git://git.torproject.org/torbrowser.git.
Instead of rejecting a value that doesn't divide into 1 second, round to
the nearest divisor of 1 second and warn.
Document that the option only controls the granularity written by Tor to a
file or console log. It does not (for example) "batch up" log messages to
affect times logged by a controller, times attached to syslog messages, or
the mtime fields on log files.
Also, make the NodeFamily option into a list of routersets. This
lets us git rid of router_in_nickname_list (or whatever it was
called) without porting it to work with nodes, and also lets people
specify country codes and IP ranges in NodeFamily
* MINIUPNPC rather than the generic UPNP
* Nick suggested a better abstraction model for tor-fw-helper
* Fix autoconf to build with either natpmp or miniupnpc
* Add AM_PROG_CC_C_O to fix automake complaint
* update spec to address nickm's concern
* refactor nat-pmp to match upnp state
* we prefer tor_snprintf to snprintf
* link properlty for tor_snprintf
* rename test_commandline_options to log_commandline_options
* cast this uint as an int
* detect possible FD_SETSIZE errors
* make note about future enhancements for natpmp
* add upnp enhancement note
* ChangeLog entry
* doxygen and check-spaces cleanup
* create tor-fw-helper.1.txt
tor-fw-helper is a command-line tool to wrap and abstract various
firewall port-forwarding tools.
This commit matches the state of Jacob's tor-fw-helper branch as of
23 September 2010.
(commit msg by Nick)
This is needed for IOCP, since telling the IOCP backend about all
your CPUs is a good idea. It'll also come in handy with asn's
multithreaded crypto stuff, and for people who run servers without
reading the manual.
This numbers the proposal to reflect the current discussion on or-dev and irc
This change updates the proposal index to reflect prop 171
This change also includes an update about Nick blessing me as a proposal editor
Proposal 171 is the product of many comments from many contributors including
but not limited to:
Damon McCoy
Linus Nordberg
Nick Matthewson
Robert Hogan
Robert Ransom
Sebastian Hahn
* doc/Makefile.am: Move $(VAR:MOD) expansions inside "if USE_ASCIIDOC".
* doc/Makefile.am: Use proper variable name for text input files.
* doc/Makefile.am: Initialize vars to empty when !USE_ASCIIDOC.
In tor-spec.txt, instead of saying "nodes may X" instead say "Current
nodes do X; this is nonconformant. Clients should watch out for that."
Based on observations by wanoskarnet.
At best, this patch helps us avoid sending queued relayed cells that
would get ignored during the time between when a destroy cell is
sent and when the circuit is finally freed. At worst, it lets us
release some memory a little earlier than it would otherwise.
Fix for bug #1184. Bugfix on 0.2.0.1-alpha.
* doc/Makefile.am: Change $(VAR:MOD) to ${VAR:MOD} -- make(1) on
NetBSD substitutes '$(:x)' to 'x' rather than the empty string. This
bites us in doc/ when configured with `--disable-asciidoc'. Curly
braces should work in all implementations of make(1) but this patch
changes only the places where we use the VAR:MOD expansion.
V3 authorities no longer decide not to vote on Guard+Exit. The bandwidth
weights should take care of this now.
Also, lower the max threshold for WFU to 0.98, to allow more nodes to become
guards.
Previously, we said (more or less), "a2x is broken and here's how you could
try to fix it". Instead, we now say "We need a2x to build manpages; a2x
didn't work; here is a fix that might work for you; alternatively you
could just skip manpage building."
Addresses bug 1524.
Also, give the message as a here-document rather than a bunch of echos.
There are now four ways that CBT can be disabled:
1. Network-wide, with the cbtdisabled consensus param.
2. Via config, with "LearnCircuitBuildTimeout 0"
3. Via config, with "AuthoritativeDirectory 1"
4. Via a state file write failure.
The main changes are to explain how we use git branches, how we use
changes files, and what should go into a patch. Putting these in
HACKING means that we shouldn't need to constantly refer to the or-dev
emails where we explain this stuff.
Everything that accepted the 'Circ' name handled it wrong, so even now
that we fixed the handling of the parameter, we wouldn't be able to
set it without making all the 0.2.2.7..0.2.2.10 relays act wonky.
This patch makes Tors accept the 'Circuit' name instead, so we can
turn on circuit priorities without confusing the versions that treated
the 'Circ' name as occasion to act weird.
Zax from #tor noticed that while we list docbook-xsl and docbook-xml
in our helpful error text when making the docs fails, we forgot to
also list libxml2-utils. Let's add that.
- Mention potentially negative consequence of server push, combined
with client caching
- Make the new cell type more generic, allowing other types of
exit-side transforms (suggested by nickm)
See http://archives.seul.org/or/dev/Feb-2010/msg00000.html
All other bandwidthrate settings are restricted to INT32_MAX, but
this check was forgotten for PerConnBWRate and PerConnBWBurst. Also
update the manpage to reflect the fact that specifying a bandwidth
in terabytes does not make sense, because that value will be too
large.
This removes the Makefile.am from doc/design-paper and replaces it with
a static Makefile. We don't need to call it during the normal Tor build
process, as we don't need its targets normally. Keeping it around in
case we want to rebuild the pdf or ps files later.
I propose a backward-compatible change to the Tor connection
establishment protocol to avoid the use of TLS
renegotiation.
Rather than doing a TLS renegotiation to exchange
certificates and authenticate the original handshake, this
proposal takes an approach similar to Steven Murdoch's
proposal 124, and uses Tor cells to authenticate the
parties' identities once the initial TLS handshake is
finished.
This should be a very faithful conversion, preserving as much of the layout
of the old manpage as possible. This wasn't possible for the nt-service
and the DataDirectory/state parts. See a later commit for some small
cleanups.
Tiago Faria helped with the asciidoc conversion, big thanks!
Fix statistics on client numbers by country as seen by bridges that were
broken in 0.2.2.1-alpha. Also switch to reporting full 24-hour intervals
instead of variable 12-to-48-hour intervals.
The HSAuthorityRecordStats option was used to track statistics of overall
hidden service usage on the version 0 hidden service authorities. With the
version 2 hidden service directories being deployed and version 0
descriptors being phased out, these statistics are not as useful anymore.
Goodbye, you fine piece of software; my first major code contribution to
Tor.
This commit implements a new config option: 'DisableAllSwap'
This option probably only works properly when Tor is started as root.
We added two new functions: tor_mlockall() and tor_set_max_memlock().
tor_mlockall() attempts to mlock() all current and all future memory pages.
For tor_mlockall() to work properly we set the process rlimits for memory to
RLIM_INFINITY (and beyond) inside of tor_set_max_memlock().
We behave differently from mlockall() by only allowing tor_mlockall() to be
called one single time. All other calls will result in a return code of 1.
It is not possible to change DisableAllSwap while running.
A sample configuration item was added to the torrc.complete.in config file.
A new item in the man page for DisableAllSwap was added.
Thanks to Moxie Marlinspike and Chris Palmer for their feedback on this patch.
Please note that we make no guarantees about the quality of your OS and its
mlock/mlockall implementation. It is possible that this will do nothing at all.
It is also possible that you can ulimit the mlock properties of a given user
such that root is not required. This has not been extensively tested and is
unsupported. I have included some comments for possible ways we can handle
this on win32.
The old flavored consensus URL format made it harder to decode URLs
based on their prefixes, and didn't take into account our "only give
it to me if it's signed by enough authorities" stuff.
The point of doing SHA256 twice is, generally, is to prevent message
extension attacks where an attacker who knows H(A) can calculate
H(A|B). But for attaching a signature to a document, the attacker
already _knows_ A, so trying to keep them from calculating H(A|B) is
pointless.
"neonomad" pointed out on or-talk that the order is opposite from the
intuitive order. explain why. we chose to fix the spec rather than the
code because there are controllers like torflow that already expect
the current behavior.
A) We were considering a circuit had timed out in the special cases
where we close rendezvous circuits because the final rendezvous
circuit couldn't be built in time.
B) We were looking at the wrong timestamp_created when considering
a timeout.
This code adds a new field to vote on: "params". It consists of a list of
sorted key=int pairs. The output is computed as the median of all the
integers for any key on which anybody voted.
Improved with input from Roger.
Add a "getinfo status/accepted-server-descriptor" controller
command, which is the recommended way for controllers to learn
whether our server descriptor has been successfully received by at
least on directory authority. Un-recommend good-server-descriptor
getinfo and status events until we have a better design for them.
We were triggering a CLOCK_SKEW controller status event whenever
we connect via the v2 connection protocol to any relay that has
a wrong clock. Instead, we should only inform the controller when
it's a trusted authority that claims our clock is wrong. Bugfix
on 0.2.0.20-rc; starts to fix bug 1074. Reported by SwissTorExit.
