This code was in compat_threads, since it was _used_ for efficiently
notifying the main libevent thread from another thread. But in
spite of its usage, it's fundamentally a part of the network code.
The "conffile" module knows about includes and filesystem access,
whereas confline doesn't. This will make it possible to put these
functions into libraries without introducing a cycle.
For HSv3, the HSADDRESS= wasn't properly parsed for the HSPOST command. It now
correctly use it and furthermore sends back a "200 OK" in case the command is
successful for a v3 descriptor.
Fixes#26523
Signed-off-by: David Goulet <dgoulet@torproject.org>
The smartlist_core library now contains only the parts of smartlists
that are needed for the logging library. This resolves the
circularity between "container" and "log".
The "containers" library still uses the logging code, and has the
higher-level smartlist functions.
Fixes bug 26480; bug appeared when we re-enabled the geoip tests on
windows. Bug originally introduced by our fix to 25787; bug not in
any released Tor.
This patch fixes a memory leak in disk_state_parse_commits() where if
commit is NULL, we continue the internal loop, but without ever freeing
the args variable.
See: Coverity CID 1437441.
This patch fixes a memory leak in frac_nodes_with_descriptors() where
we might return without free'ing the bandwidths variable.
See: Coverity CID 1437451.
This patch fixes a memory leak in new_establish_intro_cell() that could
happen if a test assertion fails and the *cell_out value isn't properly
free'd.
See: Coverity CID 1437445
This patch fixes a memory leak in decode_link_specifiers() where the
hs_spec variable might leak if the default label is taken in the
switch/case expression.
See: Coverity CID 1437437.
This patches fixes a memory leak in client_likes_consensus() where if
consensus_cache_entry_get_voter_id_digests() would fail we would return
without having free'd the voters list.
See: Coverity CID 1437447
This patch fixes a memory leak in hs_helper_build_hs_desc_impl() where
if a test assertion would fail we would leak the storage that `desc`
points to.
See: Coverity CID 1437448
This patch fixes a memory leak in pick_hsdir_v3() where we might return
early, but forgot to free the responsible_hsdirs variable. We solve this
by not allocating storage for responsible_hsdirs until it's actually
needed.
See: Coverity CID 1437449
This patch fixes a potential memory leak in test_hs_auth_cookies() if a
test-case fails and we goto the done label where no memory clean up is
done.
See: Coverity CID 1437453
This patch fixes a potential memory leak in
hs_helper_build_intro_point() where a `goto done` is called before the
`intro_point` variable have been assigned to the value of the `ip`
variable.
See: Coverity CID 1437460
See: Coverity CID 1437456
This patch:
- introduces an fdio module for low-level fd functions that don't
need to log.
- moves the responsibility for opening files outside of torlog.c,
so it won't need to call tor_open_cloexec.
The locking code gets its own module, since it's more fundamental
than the higher-level locking code.
Extracting the logging code was the whole point here. :)
Out-of-tree builds could fail to run the rust tests if built in
offline mode. cargo expects CARGO_HOME to point to the .cargo
directory, not the directory containing .cargo.
Fixes bug 26455; bug not in any released tor.
Includes configuration files to enforce these rules on lib and
common. Of course, "common" *is* a modularity violation right now,
so these rules aren't as strict as I would like them to be.
I am calling the crypto library "crypt_ops", since I want
higher-level crypto things to be separated from lower-level ones.
This library will hold only the low-level ones, once we have it
refactored.
When I wrote the first one of these, it needed the path of the geoip
file. But that doesn't translate well in at least two cases:
- Mingw, where the compile-time path is /c/foo/bar and the
run-time path is c:\foo\bar.
- Various CI weirdnesses, where we cross-compile a test binary,
then copy it into limbo and expect it to work.
Together, these problems precluded these tests running on windows.
So, instead let's just generate some minimal files ourselves, and
test against them.
Fixes bug 25787
Fix a memory leak where directory authorities would leak a chunk of
memory for every router descriptor every time they considered voting.
This bug was taking down directory authorities in the live network due
to out-of-memory issues.
Fixes bug 26435; bugfix on 0.3.3.6.
We'd like to feature gate code that calls C from Rust, as a workaround
to several linker issues when running `cargo test` (#25386), and we
can't feature gate anything out of test code if `cargo test` is called
with `--all-features`.
* FIXES#26400: https://bugs.torproject.org/26400
Previously we had code like this for bad things happening from
signal handlers, but it makes sense to use the same logic to handle
cases when something is happening at a level too low for log.c to be
involved.
My raw_assert*() stuff now uses this code.
We had accumulated a bunch of cruft here. Now let's only include
src and src/ext. (exception: src/trunnel is autogenerated code, and
need to include src/trunnel.)
This commit will break the build hard. The next commit will fix it.
The doctests for src/rust/crypto don't compile for multiple reasons,
including some missing exports and incorrect identifier paths. Fixes
bug 26415; bugfix on 0.3.4.1-alpha.
We need this trick because some of our Rust tests depend on our C
code, which in turn depend on other native libraries, which thereby
pulls a whole mess of our build system into "cargo test".
To solve this, we add a build script (build.rs) to set most of the
options that we want based on the contents of config.rust. Some
options can't be set, and need to go to the linker directly: we use
a linker replacement (link_rust.sh) for these. Both config.rust and
link_rust.sh are generated by autoconf for us.
This patch on its own should enough to make the crypto test build,
but not necessarily enough to make it pass.
After the big or.h refactoring, one single unit test file was missing two
headers for node_t and microdesc_t.
Signed-off-by: David Goulet <dgoulet@torproject.org>
Due to linker issues (#25386) when testing Rust code which calls C,
all tests which touch FFI code should now be feature-gated behind the
"test-c-from-rust" flag. To run this test code, cargo must be called
with `cargo test --features="test-c-from-rust"`.
* FIXES#26398: https://bugs.torproject.org/26398
Also make sure that we're actually running the test from within the right
cwd, like we do when we're building. This seems necessary to avoid
an error when running offline.
Amusingly, it appears that we had this bug before: we just weren't
noticing it, because of bug 26258.
Some versions of GCC complain that the bfn_mock_node_get_by_id
function might return NULL, but we're assuming that it won't.
(We're assuming it won't return NULL because we know in the tests
that we're passing it valid IDs.)
To make GCC happy, tt_assert() that each node_t is set before using
it.
Fixes a second case of bug26269; bugfix on 0.3.0.1-alpha.
Here is how this changes the HSv3 client-side and service-side:
For service side we already required live consensus to upload descriptors (see
9e900d1db7) so we should never get there without
a live consensus.
For the client-side we now require a live consensus to attempt to connect to
HS. While this changes the client behavior in principle, it doesn't really
change it, because we always required live consensus to set HSDir indices, so
before this patch a client with no live consensus would try to compute
responsible HSDirs without any HSDir indices and bug out. This makes the client
behavior more consistent, by requiring a live consensus (and hence a
semi-synced clock) for the client to connect to an HS entirely.
The alternative would have been to allow setting HSDir indices with a non-live
consensus, but this would cause the various problems outlined by commit
b89d2fa1db.
There are a few reasons that relays might be uploading desciptors
without saying X-Desc-Gen-Reason:
1. They are running an old version of our software, before 0.3.2.stable.
2. They are not running our software, but they are claiming they
are.
3. They are uploading through a proxy that strips X-Desc-Gen-Reason.
4. They somehow had a bug in their software.
According to the 25686 data, 1 is the most common reason. This
ticket is an attempt to diagnose case 4, or prove that case 4
doesn't actually happen.
With the work on #25500 (reducing CPU client usage), the HS service main loop
callback is enabled as soon as the HS service map changes which happens when
registering a new service.
Unfortunately, for an ephemeral service, we were building the onion address
*after* the registration leading to the "service->onion_address` to be an
empty string.
This broke the "HS_DESC CREATED" event which had no onion address in it. And
also, we were logging an empty onion address for that service.
Fixes#25939
Signed-off-by: David Goulet <dgoulet@torproject.org>
* REFACTORS `UnvalidatedProtoEntry::from_str` to place the bulk of the
splitting/parsing logic in to a new
`UnvalidatedProtoEntry::parse_protocol_and_version_str()` method (so that
both `from_str()` and `from_str_any_len()` can call it.)
* ADD a new `UnvalidatedProtoEntry::from_str_any_len()` method in order to
maintain compatibility with consensus methods older than 29.
* ADD a limit on the number of characters in a protocol name.
* FIXES part of #25517: https://bugs.torproject.org/25517
In protover.c, the `expand_protocol_list()` function expands a `smartlist_t` of
`proto_entry_t`s to their protocol name concatenated with each version number.
For example, given a `proto_entry_t` like so:
proto_entry_t *proto = tor_malloc(sizeof(proto_entry_t));
proto_range_t *range = tor_malloc_zero(sizeof(proto_range_t));
proto->name = tor_strdup("DoSaaaaaaaaaaaaaaaaaaaaaa[19KB]aaa");
proto->ranges = smartlist_new();
range->low = 1;
range->high = 65536;
smartlist_add(proto->ranges, range);
(Where `[19KB]` is roughly 19KB of `"a"` bytes.) This would expand in
`expand_protocol_list()` to a `smartlist_t` containing 65536 copies of the
string, e.g.:
"DoSaaaaaaaaaaaaaaaaaaaaaa[19KB]aaa=1"
"DoSaaaaaaaaaaaaaaaaaaaaaa[19KB]aaa=2"
[…]
"DoSaaaaaaaaaaaaaaaaaaaaaa[19KB]aaa=65535"
Thus constituting a potential resource exhaustion attack.
The Rust implementation is not subject to this attack, because it instead
expands the above string into a `HashMap<String, HashSet<u32>` prior to #24031,
and a `HashMap<UnvalidatedProtocol, ProtoSet>` after). Neither Rust version is
subject to this attack, because it only stores the `String` once per protocol.
(Although a related, but apparently of too minor impact to be usable, DoS bug
has been fixed in #24031. [0])
[0]: https://bugs.torproject.org/24031
* ADDS hard limit on protocol name lengths in protover.c and checks in
parse_single_entry() and expand_protocol_list().
* ADDS tests to ensure the bug is caught.
* FIXES#25517: https://bugs.torproject.org/25517
* REFACTORS `UnvalidatedProtoEntry::from_str` to place the bulk of the
splitting/parsing logic in to a new
`UnvalidatedProtoEntry::parse_protocol_and_version_str()` method (so that
both `from_str()` and `from_str_any_len()` can call it.)
* ADD a new `UnvalidatedProtoEntry::from_str_any_len()` method in order to
maintain compatibility with consensus methods older than 29.
* ADD a limit on the number of characters in a protocol name.
* FIXES part of #25517: https://bugs.torproject.org/25517
In protover.c, the `expand_protocol_list()` function expands a `smartlist_t` of
`proto_entry_t`s to their protocol name concatenated with each version number.
For example, given a `proto_entry_t` like so:
proto_entry_t *proto = tor_malloc(sizeof(proto_entry_t));
proto_range_t *range = tor_malloc_zero(sizeof(proto_range_t));
proto->name = tor_strdup("DoSaaaaaaaaaaaaaaaaaaaaaa[19KB]aaa");
proto->ranges = smartlist_new();
range->low = 1;
range->high = 65536;
smartlist_add(proto->ranges, range);
(Where `[19KB]` is roughly 19KB of `"a"` bytes.) This would expand in
`expand_protocol_list()` to a `smartlist_t` containing 65536 copies of the
string, e.g.:
"DoSaaaaaaaaaaaaaaaaaaaaaa[19KB]aaa=1"
"DoSaaaaaaaaaaaaaaaaaaaaaa[19KB]aaa=2"
[…]
"DoSaaaaaaaaaaaaaaaaaaaaaa[19KB]aaa=65535"
Thus constituting a potential resource exhaustion attack.
The Rust implementation is not subject to this attack, because it instead
expands the above string into a `HashMap<String, HashSet<u32>` prior to #24031,
and a `HashMap<UnvalidatedProtocol, ProtoSet>` after). Neither Rust version is
subject to this attack, because it only stores the `String` once per protocol.
(Although a related, but apparently of too minor impact to be usable, DoS bug
has been fixed in #24031. [0])
[0]: https://bugs.torproject.org/24031
* ADDS hard limit on protocol name lengths in protover.c and checks in
parse_single_entry() and expand_protocol_list().
* ADDS tests to ensure the bug is caught.
* FIXES#25517: https://bugs.torproject.org/25517
Apparently, even though I had tested on OpenSSL 1.1.1 with
no-deprecated, OpenSSL 1.1.0 is different enough that I should have
tested with that as well.
Fixes bug 26156; bugfix on 0.3.4.1-alpha where we first declared
support for this configuration.
Add two new files (crypto_hkdf.c, crypto_hkdf.h) as new module of crypto.[ch].
This new module includes all functions and dependencies related to HKDF
operations. Those have been removed from crypto.[ch].
Follows #24658.
Signed-off-by: Fernando Fernandez Mancera <ffmancera@riseup.net>
i don't know if whitespace is ok to have before preprocessing
directives on all platforms, but anyway we almost never have it,
so now things are more uniform.
Before this commit, the control events were never triggered. It was introduced
with commit 0c19ce7bde.
Fixes#26082
Signed-off-by: David Goulet <dgoulet@torproject.org>
We alloc/free X.509 structures in three ways:
1) X509 structure allocated with X509_new() and X509_free()
2) Fake X509 structure allocated with fake_x509_malloc() and fake_x509_free()
May contain valid pointers inside.
3) Empty X509 structure shell allocated with tor_malloc_zero() and
freed with tor_free()
The specification describes the signature token to be right after a newline
(\n) then the token "signature" and then a white-space followed by the encoded
signature.
This commit makes sure that when we parse the signature from the descriptor,
we are always looking for that extra white-space at the end of the token.
It will allow us also to support future fields that might start with
"signature".
Fixes#26069
Signed-off-by: David Goulet <dgoulet@torproject.org>
There are three cases where this can happen: changes in our
controller events, changes in our DisableNetwork setting, and
changes in our hibernation state.
Closes ticket 26063.
Two new values in each direction. DELIVERED counts valid end-to-end circuit
data that is accepted by our end and OVERHEAD counts the slack unused data in
each of the relay command cells for those accepted cells.
Control port changes are in the next commit.
We still do this time update here, since we do it from all
callbacks, but it is no longer a reason to keep the once-per-second
callback enabled.
Closes ticket 26009.
Since we're going to be disabling the second-elapsed callback, we're
going to sometimes have long periods when no events file, and so the
current second is not updated. Handle that by having a better means
to detect "clock jumps" as opposed to "being idle for a while".
Tolerate far more of the latter.
Part of #26009.
The any_client_port_set() returns true if the ControlPort is set which is
wrong because we can have that port open but still not behave as a tor client
(like many relays for instance).
Fixes#26062
Signed-off-by: David Goulet <dgoulet@torproject.org>
The options_any_client_port_set() returns true if the ControlPort is set which
is wrong because we can have that port open but still not behave as a tor
client (like many relays for instance).
Fixes#26062
Signed-off-by: David Goulet <dgoulet@torproject.org>
This functions is now used outside of networkstatus.c and makes more sense to
be in config.c.
It is also renamed to options_any_client_port_set() for the config.c
namespace.
No code behavior change.
Signed-off-by: David Goulet <dgoulet@torproject.org>
Now it has a function that can tell the rest of Tor whether any
once-a-second controller item should fire, and a function to fire
all the once-a-second events.
When directory authorities read a zero-byte bandwidth file, they log
a warning with the contents of an uninitialised buffer. Log a warning
about the empty file instead.
Fixes bug 26007; bugfix on 0.2.2.1-alpha.
Remove v3 optimization which made Tor not detect disabling services.
This optimization is not so needed because we only call that function after HUP
anyway.
Fixes bug #25761.
During service configuration, rend_service_prune_list_impl_() sets
rend_service_staging_list to NULL, which blocked pruning after a HUP.
This patch initializes rend_service_staging_list when needed, so that HUP can
detect disabled onion services.
Fixes bug #25761.
Previously the coverage on this function was mostly accidental,
coming as it did from test_entryconn.c. These new tests use mocking
to ensure that we actually hit the different failure and retry cases
of addressmap_get_virtual_address(), and make our test coverage a
bit more deterministic.
Closes ticket 25993.
Previously, an authority with a clock more than 60 seconds ahead could
cause a client with a correct clock to warn that the client's clock
was behind. Now the clocks of a majority of directory authorities
have to be ahead of the client before this warning will occur.
Relax the early-consensus check so that a client's clock must be 60
seconds behind the earliest time that a given sufficiently-signed
consensus could possibly be available.
Add a new unit test that calls warn_early_consensus() directly.
Fixes bug 25756; bugfix on 0.2.2.25-alpha.
construct_consensus() in test_routerlist.c created votes using a
timestamp from time(). Tests that called construct_consensus() might
have nondeterministic results if they rely on time() not changing too
much on two successive calls.
Neither existing of the two existing tests that calls
construct_consensus is likely to have a failure due to this problem.
Included crypto_dh.h in some files in order to solve DH module dependency
issues.
Follows #24658.
Signed-off-by: Fernando Fernandez Mancera <ffmancera@riseup.net>
Add two new files (crypto_dh.c, crypto_dh.h) as new module of crypto.[ch]. This
new module includes all functions and dependencies related to DH operations.
Those have been removed from crypto.[ch].
Follows #24658.
Signed-off-by: Fernando Fernandez Mancera <ffmancera@riseup.net>
crypto_log_errors() has been moved to crypto_util.[ch]. It was duplicated in
some files so they have been removed too.
Follows #24658.
Signed-off-by: Fernando Fernandez Mancera <ffmancera@riseup.net>
Code movement for the refactoring for ticket 24658 didn't copy the
inclusion of sys/random.h, which is needed to get a prototype for
getentropy() on macOS 10.12 Sierra. It also didn't copy the inclusion
of sys/syscall.h, which might prevent the getrandom() syscall from
being properly detected. Move these inclusions. Bug not in any
released Tor.
Our previous algorithm had a nonzero probability of picking no
events to cancel, which is of course incorrect. The new code uses
Vitter's good old reservoir sampling "algorithm R" from 1985.
Fixes bug 26008; bugfix on 0.2.6.3-alpha.
This functionality was covered only accidentally by our voting-test
code, and as such wasn't actually tested at all. The tests that
called it made its coverage nondeterministic, depending on what time
of day you ran the tests.
Closes ticket 26014.
This is needed for libressl-2.6.4 compatibility, which we broke when
we merged a15b2c57e1 to fix bug 19981. Fixes bug 26005; bug
not in any released Tor.
We cleared this value in second_elapsed_callback. But what were we
using it for? For detecting if Libevent returned EINVAL too often!
We already have a way to detect too-frequent events, and that's with
a ratelim_t. Refactor the code to use that instead. Closes ticket
26016.
From Neel's latest patch on optimizing the hs_circ_service_get_intro_circ()
digest calculation, remove an extra white-space and clarify a comment of the
legacy key digest to inform when to use it.
Signed-off-by: David Goulet <dgoulet@torproject.org>
This function must return false if the module is not compiled in. In order to
do that, we move the authdir_mode_v3() function out of router.c and into the
dirauth module new header file named mode.h.
It is always returning false if we don't have the module.
Closes#25990
Signed-off-by: David Goulet <dgoulet@torproject.org>
This test was using the current time to pick the time period number,
and a randomly generated hs key. Therefore, it sometimes picked an
index that would wrap around the example dht, and sometimes would
not.
The fix here is just to fix the time period and the public key.
Fixes bug 25997; bugfix on 0.3.2.1-alpha.
When directory authorities read a zero-byte bandwidth file, they log
a warning with the contents of an uninitialised buffer. Log a warning
about the empty file instead.
Fixes bug 26007; bugfix on 0.2.2.1-alpha.
LibreSSL, despite not having the OpenSSL 1.1 API, does define
OPENSSL_VERSION in crypto.h. Additionally, it apparently annotates
some functions as returning NULL, so that our unit tests need to be
more careful about checking for NULL so they don't get compilation
warnings.
Closes ticket 26006.
This test, in test_client_pick_intro(), will have different coverage
depending on whether it selects a good intro point the first time or
whether it has to try a few times. Since it produces the shorter
coverage with P=1/4, repeat this test 64 times so that it only
provides reduced coverage with P=1/2^128. The performance cost is
negligible.
Closes ticket 25996. This test was introduced in 0.3.2.1-alpha.
I'd prefer not to do this for randomized tests, but as things stand
with this test, it produces nondeterministic test coverage.
Closes ticket 25995; bugfix on 0.2.2.2-alpha when this test was
introduced.
This change should make it impossible for the monotonic time to roll
over from one EWMA tick to the next during this test, and make it so
that this test never invokes scale_active_circuits() (which it
doesn't test).
(Earlier changes during the 0.3.4 series should make this call even
rarer than it was before, since we fixed#25927 and removed
cached_gettimeofday. Because this test didn't update
cached_gettimeofday, the chance of rolling over a 10-second interval
was much higher.)
Closes ticket 25994; bugfix on 0.3.3.1-alpha when this test was
introduced.
Arguably, the conditions under which these events happen should be a
bit different, but the rules are complex enough here that I've tried
to have this commit be pure refactoring.
Closes ticket 25952.
Finally, before this code goes away, take a moment to look at the
amazing way that we used to try to have an event happen
every N seconds:
get_uptime() / N != (get_uptime()+seconds_elapsed) / N
Truly, it is a thing of wonder. I'm glad we didn't start using this
pattern everywhere else.
By doing so, it is renamed to voting_schedule_recalculate_timing(). This
required a lot of changes to include voting_schedule.h everywhere that this
function was used.
This effectively now makes voting_schedule.{c|h} not include dirauth/dirvote.h
for that symbol and thus no dependency on the dirauth module anymore.
Signed-off-by: David Goulet <dgoulet@torproject.org>
This function doesn't need to be public from the dirvote common file (which
will get renamed in future commit) so move it to dirauth/dirvote.c and make it
static.
Part of #25988
Signed-off-by: David Goulet <dgoulet@torproject.org>
It makes more sense to be in networkstatus.c so move it there and rename it
with the "networkstatus_" prefix.
Part of #25988
Signed-off-by: David Goulet <dgoulet@torproject.org>
Apparently, we can decide our state is dirty before we create the
event to tell the mainloop that we should save it. That's not a
problem, except for the assertion failure.
This requires that when a log cb happens, the event for flushing
queued events is scheduled, so we also add the necessary machinery
to have that happen.
Note that this doesn't actually help with logs from outside the main
thread, but those were already suppressed: see #25987 for a ticket
tracking that issue.
Sometimes the logging system will queue a log message for later.
When it does this, the callback will either get flushed at the next
safe time, or from the second-elapsed callback.
But we're trying to eliminate the second-elapsed callback, so let's
make a way for the log system to tell its users about this.
Commit 0f3b765b3c added
tor_assert_nonfatal_unreached() to dirvote_add_vote() and
dirvote_add_signatures() when the dirauth module is disabled.
However, they need to return a value. Furthermore, the dirvote_add_vote()
needs to set the msg_out and status_out so it can be sent back. Else,
uninitialized values would be used.
Signed-off-by: David Goulet <dgoulet@torproject.org>
Originally, it was made public outside of the dirauth module but it is no
longer needed. In doing so, we put it back in dirvote.c and reverted its name
to the original one:
dirvote_authority_cert_dup() --> authority_cert_dup()
Signed-off-by: David Goulet <dgoulet@torproject.org>
The --disable-module-* configure option removes code from the final binary but
we still build the unit tests with the disable module(s) so we can actually
test that code path all the time and not forget about it.
Signed-off-by: David Goulet <dgoulet@torproject.org>
This code is only for dirauth so this commit moves it into the module in
dirvote.c.
No code behavior change.
Signed-off-by: David Goulet <dgoulet@torproject.org>
Both functions are used for directory request but they can only be used if the
running tor instance is a directory authority.
For this reason, make those symbols visible but hard assert() if they are
called when the module is disabled. This would mean we failed to safeguard the
entry point into the module.
Signed-off-by: David Goulet <dgoulet@torproject.org>
In order to further isolate the dirauth code into its module, this moves the
handling of the directory request GET /tor/status-vote/* into the module.
Signed-off-by: David Goulet <dgoulet@torproject.org>
In order to make sr_commit_free() only used by the dirauth module, this
commits moves the commits free from a vote object into the dirvote.c file
which is now only for the module.
The function does nothing if the module is disabled.
Signed-off-by: David Goulet <dgoulet@torproject.org>
Adds two unittests:
- First checks the path selection of basic Tor circs.
- Second checks the path selection of vanguard circs.
There is a TODO on the second unittest that we might want to test sooner than
later, but it's not trivial to do it right now.
To do these unittests we needed the following mods:
- Make some functions STATIC.
- Add some more fields to the big fake network nodes of test_entrynodes.c
- Switch fake node nicknames to base32 (because base64 does not produce valid nicknames).
This prevents a malicious RP/IP from learning the guard node in the case that
we are using only one (because we aren't using two guards, or because one of
those two guards is temporarily down).
This ensures the "strong" version of Property #6 from
https://lists.torproject.org/pipermail/tor-dev/2018-April/013098.html
(Information about the guard(s) does not leak to the website/RP at all).
The last hop in vanguard circuits can be an RP/IP/HSDir.
Since vanguard circuits are at least 3 hops (sometimes 4) before this node,
this change will not cause A - B - A paths.
When parsing a vote in routerparse.c, only dirauth extract the commits from
the vote so move all this code into dirvote.c so we can make it specific to
the dirauth module.
If the dirauth module is disabled, the commit parsing does nothing.
Signed-off-by: David Goulet <dgoulet@torproject.org>
From dirvote.c to networkstatus.c where it makes more sense both in terms of
namespace and subsystem responsability.
This removes one less dependency on the dirauth module.
Signed-off-by: David Goulet <dgoulet@torproject.org>
Add static inline dirauth public functions used outside of the dirauth module
so they can be seen by the tor code but simply do nothing.
Signed-off-by: David Goulet <dgoulet@torproject.org>
Move most of the shared random functions that are needed outside of the
dirauth module.
At this commit, because dirvote.c hasn't been refactor, it doesn't compile
because some SR functions need a dirvote function.
Furthermore, 5 functions haven't been touched yet because they are dirauth
only but are in used in other C files than the dirauth module ones.
No code behavior change. Only moving code around.
Signed-off-by: David Goulet <dgoulet@torproject.org>
This is a pretty big commit but it only moves these files to src/or/dirauth:
dircollate.c dirvote.c shared_random.c shared_random_state.c
dircollate.h dirvote.h shared_random.h shared_random_state.h
Then many files are modified to change the include line for those header files
that have moved into a new directory.
Without using --disable-module-dirauth, everything builds fine. When using the
flag to disable the module, tor doesn't build due to linking errors. This will
be addressed in the next commit(s).
No code behavior change.
Signed-off-by: David Goulet <dgoulet@torproject.org>
Remove useless include.
Clearly identify functions that are used by other part of Tor, functions that
are only used by the dirauth subsystem and functions that are exposed for unit
tests.
This will help us in the dirauth modularization effort.
Signed-off-by: David Goulet <dgoulet@torproject.org>
Many functions become static to the C file or exposed to the tests within the
PRIVATE define of dirvote.h.
This commit moves a function to the top. No code behavior change.
Signed-off-by: David Goulet <dgoulet@torproject.org>
Don't access the AuthoritativeDir options directly. We do this so we can move
authdir_mode() to the dirauth module.
Signed-off-by: David Goulet <dgoulet@torproject.org>
Make our build system support a disable dirauth module option. It can only be
disabled explicitly with:
$ ./configure --disable-module-dirauth
If *not* specified that is enabled, an automake conditional variable is set to
true and a defined value for the C code:
AM_CONDITIONAL: BUILD_MODULE_DIRAUTH
AC_DEFINE: HAVE_MODULE_DIRAUTH=1
This introduces the dirauth/ module directory in src/or/ for which .c files
are only compiled if the BUILD_MODULE_DIRAUTH is set.
All the header files are compiled in regardless of the support so we can use
the alternative entry point functions of the dirauth subsystem.
Signed-off-by: David Goulet <dgoulet@torproject.org>
Because we rescan the main loop event list if the global map of services has
changed, this makes sure it does work.
Signed-off-by: David Goulet <dgoulet@torproject.org>
Because ADD_ONION/DEL_ONION can modify the global service map (both for v2 and
v3), we need to rescan the event list so we either enable or disable the HS
service main loop event.
Fixees #25939
Signed-off-by: David Goulet <dgoulet@torproject.org>
This is done because it makes our life easier with unit tests. Also, a rescan
on an uninitialized event list will result in a stacktrace.
Signed-off-by: David Goulet <dgoulet@torproject.org>
When we change the hibernation state, rescan the main loop event list because
the new state might affect the events.
Signed-off-by: David Goulet <dgoulet@torproject.org>
Implement the ability to set flags per events which influences the set up of
the event.
This commit only adds one flag which is "need network" meaning that the event
is not enabled if tor has disabled the network or if hibernation mode.
Signed-off-by: David Goulet <dgoulet@torproject.org>
Prior to #23100, we were not counting HS circuit build times in our
calculation of the timeout. This could lead to a condition where our timeout
was set too low, based on non HS circuit build times, and then we would
abandon all HS circuits, storing no valid timeouts in the histogram.
This commit avoids the assert.
Needed to run tests from the tarball else the geoip unit test would fail by
not finding that file.
Signed-off-by: David Goulet <dgoulet@torproject.org>
In 25374, we created the necessary post-loop event for scheduling
connection_ap_attach_pending as needed. Before that, we were
already running this event once per mainloop. There's no reason to
also run it once per second.
Closes ticket 25933. No changes file, since the relevant change is
already in 25374. Or possibly in 17590, depending on how you look
at it.
Our main function, though accurate on all platforms, can be very
slow on 32-bit hosts. This one is faster on all 32-bit hosts, and
accurate everywhere except apple, where it will typically be off by
1%. But since 32-bit apple is a relic anyway, I think we should be
fine.
Previously were using this value to have a cheap highish-resolution
timer. But we were only using it in one place, and current dogma is
to use monotime_coarse_t for this kind of thing.
This part of the code was the only part that used "cached
getttimeofday" feature, which wasn't monotonic, which we updated at
slight expense, and which I'd rather not maintain.
The clean_consdiffmgr() callback is only for relays acting as a directory
server, not all relays.
This commit adds a role for only directory server and sets the
clean_consdiffmgr() callback to use it.
Signed-off-by: David Goulet <dgoulet@torproject.org>
We can't end up in the removed else {} condition since we first validate the
flavor we get and then we validate the flavor we parse from the given
consensus which means we can only handle the two flavors of the if/elseif
conditions.
Fixes#25914
Signed-off-by: David Goulet <dgoulet@torproject.org>
Previously, we were ignoring values _over_ EPSILON. This bug was
also causing a warning at startup because the default value is set
to -1.0.
Fixes bug 25577; bugfix on 6b1dba214d. Bug not in any released tor.
Two helper functions to enable an event and disable an event which wraps the
launch and destroy of an event but takes care of the enabled flag.
They are also idempotent that is can be called multiple time on the same event
without effect if the event was already enabled or disabled.
Signed-off-by: David Goulet <dgoulet@torproject.org>
In case we transitionned to a new role in Tor, we need to launch and/or
destroy some periodic events.
Signed-off-by: David Goulet <dgoulet@torproject.org>
In tor, we have a series of possible "roles" that the tor daemon can be
enabled for. They are:
Client, Bridge, Relay, Authority (directory or bridge) and Onion service.
They can be combined sometimes. For instance, a Directory Authority is also a
Relay. This adds a "roles" field to a periodic event item object which is used
to know for which roles the event is for.
The next step is to enable the event only if the roles apply. No behavior
change at this commit.
Pars of #25762
Signed-off-by: David Goulet <dgoulet@torproject.org>
No behavior change, just to make it easier to find callbacks and for the sake
of our human brain to parse the list properly.
Signed-off-by: David Goulet <dgoulet@torproject.org>
Consensus method 25 is the oldest one supported by any stable
version of 0.2.9, which is our current most-recent LTS. Thus, by
proposal 290, they should be removed.
This commit does not actually remove the code to implement these
methods: it only makes it so authorities will no longer support
them. I'll remove the backend code for them in later commits.
It tried to pick nodes for which only routerinfo_t items are set,
but without setting UseMicroDescriptors to 0. This won't work any
more, now that we're strict about using the right descriptor types
due to 25691/25692/25213.
In order to fix 25691 and 25692, we need to pass the "direct_conn"
flag to more places -- particularly when choosing single-hop
tunnels. The right way to do this involves having a couple more
functions accept router_crn_flags_t, rather than a big list of
boolean arguments.
This commit also makes sure that choose_good_exit_server_general()
honors the direct_conn flag, to fix 25691 and 25692.
In router_add_running_nodes_to_smartlist(), we had an inline
implementation of the logic from node_has_descriptor(), which should
be changed to node_has_preferred_descriptor().
This patch adds a new node_has_preferred_descriptor() function, and
replaces most users of node_has_descriptor() with it. That's an
important change, since as of d1874b4339 (our fix for #25213),
we are willing to say that a node has _some_ descriptor, but not the
_right_ descriptor for a particular use case.
Part of a fix for 25691 and 25692.
Now that we allow cpuworkers for dirport-only hosts (to fix 23693),
we need to allow dup_onion_keys() to succeed for them.
The change to construct_ntor_key_map() is for correctness,
but is not strictly necessary.
This is done as follows:
* Only one function (find_dl_schedule()) actually returned a
smartlist. Now it returns an int.
* The CSV_INTERVAL type has been altered to ignore everything
after the first comma, and to store the value before the first
comma in an int.
This commit won't compile. It was made with the following perl
scripts:
s/smartlist_t \*(.*)DownloadSchedule;/int $1DownloadInitialDelay;/;
s/\b(\w*)DownloadSchedule\b/$1DownloadInitialDelay/;
sizeof(ret) is the size of the pointer, not the size of what it
points to. Fortunately, we already have a function to compare
tor_addr_port_t values for equality.
Bugfix on c2c5b13e5d8a77e; bug not in any released Tor. Found by
clang's scan-build.
Now that we update our buckets on demand before reading or writing,
we no longer need to update them all every TokenBucketRefillInterval
msec.
When a connection runs out of bandwidth, we do need a way to
reenable it, however. We do this by scheduling a timer to reenable
all blocked connections for TokenBucketRefillInterval msec after a
connection becomes blocked.
(If we were using PerConnBWRate more, it might make sense to have a
per-connection timer, rather than a single timeout. But since
PerConnBWRate is currently (mostly) unused, I'm going to go for the
simpler approach here, since usually whenever one connection has
become blocked on bandwidth, most connections are blocked on
bandwidth.)
Implements ticket 25373.
Previously this was done as part of the refill callback, but there's
no real reason to do it like that. Since we're trying to remove the
refill callback completely, we can do this work as part of
record_num_bytes_transferred_impl(), which already does quite a lot
of this.
We used to do this 10x per second in connection_buckets_refill();
instead, we now do it when the bucket becomes empty. This change is
part of the work of making connection_buckets_refill() obsolete.
Closes ticket 25828; bugfix on 0.2.3.5-alpha.
We recently merged a circuit cell queue size safeguard. This commit adds the
number of killed circuits that have reached the limit to the DoS heartbeat. It
now looks like this:
[notice] DoS mitigation since startup: 0 circuits killed with too many
cells. 0 circuits rejected, 0 marked addresses. 0 connections closed. 0
single hop clients refused.
Second thing that this patch does. It makes tor always print the DoS
mitigation heartbeat line (for a relay) even though no DoS mitigation have
been enabled. The reason is because we now kill circuits that have too many
cells regardless on if it is enabled or not but also it will give the operator
a chance to learn what is enabled with the heartbeat instead of suddenly
appearing when it is enabled by let say the consensus.
Fixes#25824
Signed-off-by: David Goulet <dgoulet@torproject.org>
