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Not all of these strictly need to be bumped to 0.2.0; many could go
to 0.1.1 instead. But since everything at the tor-rtcompat and
higher layers has had breaking API changes, it seems not so useful
to distinguish. (It seems unlikely that anybody at this stage is
depending on e.g. tor-protover but not arti-client.)
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NETINFO cells, which are sent in every handshake, may contain
timestamps. This patch adds an accessor for the timestamp in the
Netinfo messages, and teaches the tor-proto code how to compute the
minimum clock skew in the code.
The computation isn't terribly precise, but it doesn't need to be:
Tor should work fine if your clock is accurate to within a few
hours.
This patch also notes a Y2038 problem in the protocol: see
torspec#80.
Part of #405.
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Replace many manual trait impls with use of educe
See merge request tpo/core/arti!375
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Code motion and the minimal mechanical changes.
As per
https://gitlab.torproject.org/tpo/core/arti/-/merge_requests/375#note_2783078
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Disable clippy::clone_on_ref_ptr
See merge request tpo/core/arti!352
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This lint is IMO inherently ill-conceived.
I have looked for the reasons why this might be thought to be a good
idea and there were basically two (and they are sort of contradictory):
I. "Calling ‘.clone()` on an Rc, Arc, or Weak can obscure the fact
that only the pointer is being cloned, not the underlying data."
This is the wording from
https://rust-lang.github.io/rust-clippy/v0.0.212/#clone_on_ref_ptr
It is a bit terse; we are left to infer why it is a bad idea to
obscure this fact. It seems to me that if it is bad to obscure some
fact, that must be because the fact is a hazard. But why would it be
a hazard to not copy the underlying data ?
In other languages, faliing to copy the underlying data is a serious
correctness hazard. There is a whose class of bugs where things were
not copied, and then mutated and/or reused in multiple places in ways
that were not what the programmer intended. In my experience, this is
a very common bug when writing Python and Javascript. I'm told it's
common in golang too.
But in Rust this bug is much much harder to write. The data inside an
Arc is immutable. To have this bug you'd have use interior mutability
- ie mess around with Mutex or RefCell. That provides a good barrier
to these kind of accidents.
II. "The reason for writing Rc::clone and Arc::clone [is] to make it
clear that only the pointer is being cloned, as opposed to the
underlying data. The former is always fast, while the latter can
be very expensive depending on what is being cloned."
This is the reasoning found here
https://github.com/rust-lang/rust-clippy/issues/2048
This is saying that *not* using Arc::clone is hazardous.
Specifically, that a deep clone is a performance hazard.
But for this argument, the lint is precisely backwards. It's linting
the "good" case and asking for it to be written in a more explicit
way; while the supposedly bad case can be written conveniently.
Also, many objects (in our codebase, and in all the libraries we use)
that are Clone are in fact simply handles. They contain Arc(s) (or
similar) and are cheap to clone. Indeed, that is the usual case.
It does not make sense to distinguish in the syntax we use to clone
such a handle, whether the handle is a transparent Arc, or an opaque
struct containing one or more other handles.
Forcing Arc::clone to be written as such makes for code churn when a
type is changed from Arc<Something> to Something: Clone, or vice
versa.
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Closes #360.
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This exception is no longer necessary now that the underlying CI bug
is fixed.
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Remove some needless refs and slicing
See merge request tpo/core/arti!327
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Prompted by nightly's clippy (which has some false positives, so is
currently disabled).
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Re-enable clippy::ptr_arg where it had been disabled.
See merge request tpo/core/arti!323
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In one of the two places, nightly no longer warns. In the other
place, it's fine for nightly to warn: I just fixed the code to take
a slice instead.
Partial revert of 856aca879151c622512bc4b15c6307808fc83e82.
Resolves part of #310.
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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.
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Closes #338.
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Found via clippy::needless_borrow. In some cases I removed needless
`[..]` too. See also:
needless_borrow suggestion doesn't go far enough
https://github.com/rust-lang/rust-clippy/issues/8389
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I found these versions empirically, by using the following process:
First, I used `cargo tree --depth 1 --kind all` to get a list of
every immediate dependency we had.
Then, I used `cargo upgrade --workspace package@version` to change
each dependency to the earliest version with which (in theory) the
current version is semver-compatible. IOW, if the current version
was 3.2.3, I picked "3". If the current version was 0.12.8, I
picked "0.12".
Then, I used `cargo +nightly upgrade -Z minimal-versions` to
downgrade Cargo.lock to the minimal listed version for each
dependency. (I had to override a few packages; see .gitlab-ci.yml
for details).
Finally, I repeatedly increased the version of each of our
dependencies until our code compiled and the tests passed. Here's
what I found that we need:
anyhow >= 1.0.5: Earlier versions break our hyper example.
async-broadcast >= 0.3.2: Earlier versions fail our tests.
async-compression 0.3.5: Earlier versions handled futures and tokio
differently.
async-trait >= 0.1.2: Earlier versions are too buggy to compile our
code.
clap 2.33.0: For Arg::default_value_os().
coarsetime >= 0.1.20: exposed as_ticks() function.
curve25519-dalek >= 3.2: For is_identity().
generic-array 0.14.3: Earlier versions don't implement
From<&[T; 32]>
httparse >= 1.2: Earlier versions didn't implement Error.
itertools at 0.10.1: For at_most_once.
rusqlite >= 0.26.3: for backward compatibility with older rustc.
serde 1.0.103: Older versions break our code.
serde_json >= 1.0.50: Since we need its Value type to implement Eq.
shellexpand >= 2.1: To avoid a broken dirs crate version.
tokio >= 1.4: For Handle::block_on().
tracing >= 0.1.18: Previously, tracing_core and tracing had separate
LevelFilter types.
typenum >= 1.12: Compatibility with rust-crypto crates
x25519-dalek >= 1.2.0: For was_contributory().
Closes #275.
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The original comment was a gnomic question about what to box; the real
issue is that we want to avoid copying data in our critical path.
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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.
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arti!126 overhauled the `tor-proto` circuit reactor, but left out one
very important thing: actually decrementing the SENDME window for
streams (not circuits) when we send cells along them.
Since the circuit-level SENDME window would often prevent us from
running into a problem, this wasn't caught until my benchmarking efforts
noticed it (in the form of Tor nodes aborting the circuit for a protocol
violation).
fixes arti#260
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We should never get one of these unless we have opted in to get it.
(This behavior is the same as C tor.)
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We want to only use TODO in the codebase for non-blockers, and open
tickets for anything that is a bigger blocker than a TODO. These
XXXXs seem like definite non-blockers to me.
Part of arti#231.
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(The nightly version of clippy now includes macros for its
missing_docs_in_private_items lint.)
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This will cause some pain for now, but now is really the best time
to do this kind of thing.
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