Bridge relays can use it to add a "bridge-distribution-request" line
to their bridge descriptor, which tells BridgeDB how they'd like their
bridge address to be given out.
Implements tickets 18329.
Fixes bug 23908; bugfix on 0.3.1.6-rc when we made the keypin
failure message really long.
Backport from 0.3.2's 771fb7e7ba,
where arma said "get rid of the scary 256-byte-buf landmine".
Create a function that tells us if we can fetch or not the descriptor for the
given service key.
No behavior change. Mostly moving code but with a slight change so the
function can properly work by returning a boolean and also a possible fetch
status code.
Signed-off-by: David Goulet <dgoulet@torproject.org>
Skip test_config_include_no_permission() when running as root, because
it will get an unexpected success from config_get_lines_include().
This affects some continuous integration setups. Fixes bug 23758.
When we added HTTPTunnelPort, the answer that we give when you try
to use your SOCKSPort as an HTTP proxy became wrong. Now we explain
that Tor sorta _is_ an HTTP proxy, but a SOCKSPort isn't.
I have left the status line the same, in case anything is depending
on it. I have removed the extra padding for Internet Explorer,
since the message is well over 512 bytes without it.
Fixes bug 23678; bugfix on 0.3.2.1-alpha.
Without this fix, changes from client to bridge don't trigger
transition_affects_workers(), so we would never have actually
initialized the cpuworkers.
Fixes bug 23693. Bugfix on 3bcdb26267 0.2.6.3-alpha, which
fixed bug 14901 in the general case, but not on the case where
public_server_mode() did not change.
Because our monotonic time interface doesn't play well with value set to 0,
always initialize to now() the scheduler_last_run at init() of the KIST
scheduler.
Fixes#23696
Signed-off-by: David Goulet <dgoulet@torproject.org>
When a channel is scheduled and flush cells returns 0 that is no cells to
flush, we flag it back in waiting for cells so it doesn't get stuck in a
possible infinite loop.
It has been observed on moria1 where a closed channel end up in the scheduler
where the flush process returned 0 cells but it was ultimately kept in the
scheduling loop forever. We suspect that this is due to a more deeper problem
in tor where the channel_more_to_flush() is actually looking at the wrong
queue and was returning 1 for an empty channel thus putting the channel in the
"Case 4" of the scheduler which is to go back in pending state thus
re-considered at the next iteration.
This is a fix that allows the KIST scheduler to recover properly from a not
entirelly diagnosed problem in tor.
Fixes#23676
Signed-off-by: David Goulet <dgoulet@torproject.org>
When we added single_conn_free_bytes(), we cleared the outbuf on a
connection without setting outbuf_flushlen() to 0. This could cause
an assertion failure later on in flush_buf().
Fixes bug 23690; bugfix on 0.2.6.1-alpha.
This caused a BUG log when we noticed that the circuit had no
channel. The likeliest culprit for exposing that behavior is
d769cab3e5, where we made circuit_mark_for_close() NULL out
the n_chan and p_chan fields of the circuit.
Fixes bug 8185; bugfix on 0.2.5.4-alpha, I think.
My current theory is that this is just a marked circuit that hasn't
closed yet, but let's gather more information in case that theory is
wrong.
Diagnostic for 8185.
This patch ensures that we return TOR_COMPRESS_BUFFER_FULL in case we
have a input bytes left to process, but are out of output buffer or in
case we need to finish where the compression implementation might need
to write an epilogue.
See: https://bugs.torproject.org/23551
This patch ensures that we return TOR_COMPRESS_BUFFER_FULL in case we
have a input bytes left to process, but are out of output buffer or in
case we need to finish where the compression implementation might need
to write an epilogue.
See: https://bugs.torproject.org/23551
If 6 SOCKS requests are opened at once, it would have triggered 6 fetches
which ultimately poke all 6 HSDir. We don't want that, if we have multiple
SOCKS requests for the same service, do one fetch only.
Signed-off-by: David Goulet <dgoulet@torproject.org>
When purging last HSDir requests, we used time(NULL) for computing the
service blinded key but in all other places in our codebase we actually
use the consensus times. That can cause wrong behavior if the consensus
is in a different time period than time(NULL).
This commit is required for proper purging of HSDir requests.
The confparse field has type UINT, which corresponds to an int
type. We had uint32_t.
This shouldn't cause trouble in practice, since int happens to
4-bytes wide on every platform where an authority is running. It's
still wrong, though.
These should have been int, but we had listed them as unsigned.
That's an easy mistake to make, since "int" corresponds with either
INT or UINT in the configuration file.
This bug cannot have actually caused a problem in practice, since we
check those fields' values on load, and ensure that they are in
range 0..INT32_MAX.
New approach, suggested by Taylor: During testing builds, we
initialize a union member of an appropriate pointer type with the
address of the member field we're trying to test, so we can make
sure that the compiler doesn't warn.
My earlier approach invoked undefined behavior.
Also demote a log message that can occur under natural causes
(if the circuit subsystem is missing descriptors/consensus etc.).
The HS subsystem will naturally retry to connect to intro points,
so no need to make that log user-facing.
So we can track them more easily in the logs and match any open/close/free
with those identifiers.
Part of #23645
Signed-off-by: David Goulet <dgoulet@torproject.org>
This removes the "nickname" of the cannibalized circuit last hop as it is
useless. It now logs the n_circ_id and global identifier so we can match it
with other logging statement.
Signed-off-by: David Goulet <dgoulet@torproject.org>
Prior to the log statement, the circuit n_circ_id value is zeroed so keep a
copy so we can log it at the end.
Part of #23645
Signed-off-by: David Goulet <dgoulet@torproject.org>
Make the "Exit" flag assignment only depend on whether the exit
policy allows connections to ports 80 and 443. Previously relays
would get the Exit flag if they allowed connections to one of
these ports and also port 6667.
Resolves ticket 23637.
Back in 0.2.4.3-alpha (e106812a77), when we switched from using
double to using uint64 for selecting by bandwidth, I got the math
wrong: I should have used llround(x), or (uint64_t)(x+0.5), but
instead I wrote llround(x+0.5). That means we would always round
up, rather than rounding to the closest integer
Fixes bug 23318; bugfix on 0.2.4.3-alpha.
The is_first_hop field should have been called used_create_fast,
but everywhere that we wanted to check it, we should have been
checking channel_is_client() instead.
The diff is confusing, but were two static scheduler functions that
needed moving to static comment block.
No code change. Thanks dgoulet for original commit
The clock_skew_warning() refactoring allowed calls from
or_state_load() to control_event_bootstrap_problem() to occur prior
bootstrap phase 0, causing an assertion failure. Initialize the
bootstrap status prior to calling clock_skew_warning() from
or_state_load().
or_state_load() was using an incorrect sign convention when calling
clock_skew_warning() to warn about state file clock skew. This caused
the wording of the warning to be incorrect about the direction of the
skew.
is_canonical doesn't mean "am I connected to the one true address of
this relay"; it means "does this relay tell me that the address I'm
connected to belong to it." The point is to prevent TCP-based MITM,
not to prevent the relay from multi-homing.
Related to 22890.
Authority IPv6 addresses were originally added in 0.2.8.1-alpha.
This leaves 3/8 directory authorities with IPv6 addresses, but there
are also 52 fallback directory mirrors with IPv6 addresses.
Resolves 19760.
If "1" is not 64 bits wide already, then "1 << i" will not actually
work.
This bug only affects the TEST_BITOPS code, and shouldn't matter for
the actual use of the timeout code (except if/when it causes this
test to fail).
Reported by dcb314@hotmail.com. Fix for bug 23583. Not adding a
changes file, since this code is never compiled into Tor.
Use this value instead of hardcoded values of 32 everywhere. This also
addresses the use of REND_DESC_ID_V2_LEN_BASE32 in
hs_lookup_last_hid_serv_request() for the HSDir encoded identity digest length
which is accurate but semantically wrong.
Fixes#23305.
Signed-off-by: David Goulet <dgoulet@torproject.org>
RENDEZVOUS1 cell is 84 bytes long in v3 and 168 bytes long in v2 so this
commit pads with random bytes the v3 cells up to 168 bytes so they all look
alike at the rendezvous point.
Closes#23420
Signed-off-by: David Goulet <dgoulet@torproject.org>
This warning is caused by a different tv_usec data type on macOS
compared to the system on which the patch was developed.
Fixes 23575 on 0.3.2.1-alpha.
It is highly unlikely to happen but if so, we need to know and why. The
warning with the next_run values could help.
Signed-off-by: David Goulet <dgoulet@torproject.org>
When the KIST schedule() is called, it computes a diff value between the last
scheduler run and the current monotonic time. If tha value is below the run
interval, the libevent even is updated else the event is run.
It turned out that casting to int32_t the returned int64_t value for the very
first scheduler run (which is set to 0) was creating an overflow on the 32 bit
value leading to adding the event with a gigantic usec value. The scheduler
was simply never running for a while.
First of all, a BUG() is added for a diff value < 0 because if the time is
really monotonic, we should never have a now time that is lower than the last
scheduler run time. And we will try to recover with a diff value to 0.
Second, the diff value is changed to int64_t so we avoid this "bootstrap
overflow" and future casting overflow problems.
Fixes#23558
Signed-off-by: David Goulet <dgoulet@torproject.org>
This was introduced in 4ff170d7b1, and is probably
unreachable, but coverity complained about it (CID 1417761). Bug not
in any released Tor, so no changes file.
Otherwise integer overflows can happen. Remember, doing a i32xi32
multiply doesn't actually produce a 64-bit output. You need to do
i64xi32 or i64xi64.
Coverity found this as CID 1417753
Each type of scheduler implements its own static scheduler_t object and
returns a reference to it.
This commit also makes it a const pointer that is it can only change inside
the scheduler type subsystem but not outside for extra protection.
Signed-off-by: David Goulet <dgoulet@torproject.org>
Instead, add wrappers to do the needed action the different scheduler needs
with the libevent object.
Signed-off-by: David Goulet <dgoulet@torproject.org>
A channel can bounce in the scheduler and bounce out with the IDLE state which
means that if it came in the scheduler once, it has socket information that
needs to be freed from the global hash table.
Signed-off-by: David Goulet <dgoulet@torproject.org>
This option is a list of possible scheduler type tor can use ordered by
priority. Its default value is "KIST,KISTLite,Vanilla" which means that KIST
will be used first and if unavailable will fallback to KISTLite and so on.
Signed-off-by: David Goulet <dgoulet@torproject.org>
It is possible that tor was compiled with KIST support but the running kernel
has no support for it. In that case, fallback to a naive approach and flag
that we have no kernel support.
At this commit, if the kernel support is disabled, there are no ways to come
back from it other than restarting tor with a kernel that supporst KIST.
Signed-off-by: David Goulet <dgoulet@torproject.org>
Add a detection for the KIST scheduler in our build system and set
HAVE_KIST_SUPPORT if available.
Adapt the should use kist function with this new compile option.
Signed-off-by: David Goulet <dgoulet@torproject.org>
