This closes arti#256. It makes our behavior match Tor's more closely,
though it has a simpler implementation than Tor. I think that the extra
complexity in Tor's logic is because we used to record timeouts in
the histogram as well as in the success/failure log.
The implementations of `Add` / `Sub` (et al.) on `std::time::Instant`
can panic if the underlying OS structure can't represent the result
(like arti#266). Use Instant::checked_add and print a warning instead,
to prevent panicking.
Also, we now add instead of subtracting; I suspect it's reasonable that
you might not be able to go backward past the first `Instant` created on
some platforms, but going *forward* should probably work?
IIUC, these anticipatd a need to store min_exit_circs_per_port in
CircMgr. But the current design, where it goes into preemptive.rs and
thence to usage, seems to work fine.
We _do_ reject bad hostnames: just not where I once thought we might.
We need to decide if the current behavior is what we want (and I think
it is, probably?).
Our behavior in handling not-yet-valid router descriptors doesn't match
the C Tor implementation, but it's not a big deal:
we don't currently use router descriptors at all.
If we fail to convert a curve25519 key to an ed25519 key for checking
the onion-key crosscert, don't call that an internal error: it means
that something is wrong with the provided ntor key.
Previously we'd always set it to true, allowing one CONNECTED per
half-closed stream even if the stream had already received a
CONNECTED cell.
This resolves an XXXX.
The new `arti-bench` crate does a simple end-to-end benchmark test
embedding Arti: it generates some random data (of configurable amount,
depending on command-line parameters), and then sends said data back and
forth via Arti (which should be configured to use a local Chutney
network).
Additionally, the benchmark can also be run via a local SOCKS5 server
(in order to benchmark the performance via a local Chutney node, for
comparison).
The `tests/chutney/arti-bench.sh` sets up and tears down Chutney as
required to make this work.
This is very much a first cut; there are many things that should
eventually get added, such as support for multiple connections, JSON
output capabilities, running multiple tests, ...
There's no known attack here, but it's best practice to always compare
digests using a constant-time comparison operator.
This resolves an XXXX comment.
This warning occurs if we ask for microdescriptors from our local
cache, and our cache gives us something we didn't ask for. It
shouldn't be possible, so let's warn when it occurs.
This patch resolves an XXXX.
It makes sense to put the method for human-readable strings onto the
type itself, so that we can format these whenever they occur.
I'm choosing the "human_str" method name here, since caret-generated
types already have a to_str. I was thinking about using Display,
but caret types already implement that.
I've also moved the message from "warn!" to "debug!", since these
aren't necessarily a problem condition.
eta
Nick Mathewson
Daniel Eades
Tor CI Release
Muhammad Falak R Wani
Yuan Lyu
Neel Chauhan