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This adds utility functions to help stream block decisions, as well as cpath
layer_hint checks for stream cell acceptance, and syncing stream lists
for conflux circuits.
These functions are then called throughout the codebase to properly manage
conflux streams.
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This change mitigates DNS-based website oracles by making the time that
a domain name is cached uncertain (+- 4 minutes of what's measurable).
Resolves TROVE-2021-009.
Fixes #40674
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This change ensures that other parts of the code base always operate on
the same clipped TTL values, notably without being aware of clipping.
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The escaped() function and its kin already wrap their output in
quotes: there's no reason to do so twice.
I am _NOT_ making a corresponding change in calls that make the same
mistake in controller-related functions, however, due to the risk of
a compatibility break. :(
Closes #22723.
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Fixes #40587
Signed-off-by: David Goulet <dgoulet@torproject.org>
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Related #40312
Signed-off-by: David Goulet <dgoulet@torproject.org>
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This applies only for relays. Previous commit adds two new consensus
parameters that dictate how libevent is configured with DNS resolution.
And so, with a new consensus, we now look at those values in case they
ever change.
Without this, Exit relay would have to HUP or restart to apply any new
Exit DNS consensus parameters.
Related to #40312
Signed-off-by: David Goulet <dgoulet@torproject.org>
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Introduces two new consensus parameter:
exit_dns_timeout: Number of seconds before libevent should consider
the DNS request a timeout.
exit_dns_num_attempts: Number of attempts that libeven should retry a
previously failing query before calling it a timeout.
Closes #40312
Signed-off-by: David Goulet <dgoulet@torproject.org>
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This was missed in #40527 when the DNS timeout overload general signal
was removed.
Closes #40564
Signed-off-by: David Goulet <dgoulet@torproject.org>
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We now keep track of all errors and total number of request seen. This
is so we can expose those values to the MetricsPort to help Exit
operators monitor the DNS requests and failures.
Related to #40367.
Signed-off-by: David Goulet <dgoulet@torproject.org>
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This patch unbreaks the current build after tor!369 landed.
See: https://bugs.torproject.org/tpo/core/tor/40371
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This function has been a no-op since Libevent 2.0.4-alpha, when
libevent got an arc4random() implementation. Libevent has finally
removed it, which will break our compilation unless we stop calling
it. (This is currently breaking compilation in OSS-fuzz.)
Closes #40371.
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- OOM metric
- onionskin overload metric
- DNS timeout metric
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Typos found with codespell.
Please keep in mind that this should have impact on actual code
and must be carefully evaluated:
src/core/or/lttng_circuit.inc
- ctf_enum_value("CONTROLER", CIRCUIT_PURPOSE_CONTROLLER)
+ ctf_enum_value("CONTROLLER", CIRCUIT_PURPOSE_CONTROLLER)
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Also, fix a format string.
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Amazingly, this time we had no merge conflicts with "falls through" comments.
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GCC added an implicit-fallthrough warning a while back, where it
would complain if you had a nontrivial "case:" block that didn't end
with break, return, or something like that. Clang recently added
the same thing.
GCC, however, would let you annotate a fall-through as intended by
any of various magic "/* fall through */" comments. Clang, however,
only seems to like "__attribute__((fallthrough))". Fortunately, GCC
accepts that too.
A previous commit in this branch defined a FALLTHROUGH macro to do
the right thing if GNUC is defined; here we replace all of our "fall
through" comments with uses of that macro.
This is an automated commit, made with the following perl one-liner:
#!/usr/bin/perl -i -p
s#/\* *falls? ?thr.*?\*/#FALLTHROUGH;#i;
(In order to avoid conflicts, I'm applying this script separately to
each maint branch. This is the 0.4.3 version.)
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GCC added an implicit-fallthrough warning a while back, where it
would complain if you had a nontrivial "case:" block that didn't end
with break, return, or something like that. Clang recently added
the same thing.
GCC, however, would let you annotate a fall-through as intended by
any of various magic "/* fall through */" comments. Clang, however,
only seems to like "__attribute__((fallthrough))". Fortunately, GCC
accepts that too.
A previous commit in this branch defined a FALLTHROUGH macro to do
the right thing if GNUC is defined; here we replace all of our "fall
through" comments with uses of that macro.
This is an automated commit, made with the following perl one-liner:
#!/usr/bin/perl -i -p
s#/\* *falls? ?thr.*?\*/#FALLTHROUGH;#i;
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It is not called by anything outside of the tests and dns.c.
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It hasn't been used since 2009.
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This removes a dependency from the client code on feature/relay.
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This is an automated commit, generated by this command:
./scripts/maint/rename_c_identifier.py \
MIN_DNS_TTL_AT_EXIT MIN_DNS_TTL \
MAX_DNS_TTL_AT_EXIT MAX_DNS_TTL \
dns_clip_ttl clip_dns_ttl
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Previously we purged it in 1-hour increments -- but one-hour is the
maximum TTL for the cache! Now we do it in 25%-TTL increments.
Fixes bug 29617; bugfix on 0.3.5.1-alpha.
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Also, split the formatting code shared by control.c and
control_events.c into controller_fmt.c.
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Also, turn an absent hostname into a BUG(), not a crash.
Found by scan-build.
Closes ticket 28879; bugfix on 0.1.2.7-alpha
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is not available
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