My proximate motivation is that tls-api wants its inner streams to be
Debug. But in general, I agree with the Rust API Guidelines notion
that almost everything should be Debug.
I have gone for the "dump all the things" approach. A more nuanced
approach would be possible too.
This helps the user distinguish between protocol violations that
happen when connecting to the tor network from those that happen
while connected.
Closes#358.
There was only one use of this, and it was in as-yet-unused relay-only
code.
Removing this type required refactoring the relay onion handshake code
to use its own error type, which is probably clever anyway.
Additionally, refactor the IoError out of tor_cell::Error:
nothing in TorCell created this; it was only used by tor_proto.
This required refactoring in tor_proto to use a new error type. Here I
decided to use a new CodecError for now, though we may refactor that
away soon too.
This fixes a tiny race condition in the previous code, where we
checked whether an OptTimestamp is None a bit before we set it.
Since std::atomic gives us compare_exchange, we might as well use
it.
A number of severe problems with the circuit reactor were fixed which
could cause reordering of cells (which causes relays to terminate the
circuit with a protocol violation, as they become unable to decrypt
them). These mostly revolve around improper usage of queues:
- The code assumed that a failure to place cells onto the channel would
persist for the duration of a reactor cycle run. However, under high
contention, this wouldn't always be the case.
- This leads to some cells getting enqueued while others go straight
through, before the enqueued cells.
- To fix this, we block sending cells out of the channel while there
are still some enqueued.
- The hop-specific queues queued after encryption, not before. This was
very brittle, and led to frequent mis-ordering.
- This was fixed by making them not do that.
This is arti!264 / 5bce9db562 without the
refactor part.
This commit puts the native-tls crate behind a feature. The feature
is off-by-default in the tor-rtcompat crate, but can be enabled
either from arti or arti-client.
There is an included script that I used to test that tor-rtcompat
could build and run its tests with all subsets of its features.
Closes#300
Nick Mathewson
Ian Jackson
eta
Yuan Lyu
Ian Jackson
Dimitris Apostolou