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Now
cargo check --workspace --no-default-features --all-targets
cargo build -p arti --no-default-features --features=memquota,tokio,native-tls
are both clean.
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We use the *channel*'s memquota account. This is arguably wrong, but
it's hard to get right now. See #1652.
Change the type of the queue, and the places it's constructed.
The use sites can all stay the same.
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Fixes
cargo check -p tor-chanmgr --all-features --all-targets
which otherwise prints
warning: method `reply` is never used
--> crates/tor-proto/src/crypto/handshake.rs:73:8
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65 | pub(crate) trait AuxDataReply<H>
| ------------ method in this trait
...
73 | fn reply(&mut self, msg: &H::ClientAuxData) -> Option<H::ServerAuxData>;
| ^^^^^
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= note: `#[warn(dead_code)]` on by default
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This commit is automatically generated.
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As per this comment, and preceding discussion
https://gitlab.torproject.org/tpo/core/arti/-/issues/1060#note_2959187
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This function can be used to display a more user-friendly representation
of a `HopNum`. This will print hop numbers as 1-indexed values: #1,
#2, etc..
We will soon remove HopNum's Display implementation in favour of
`.display()`.
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add_warning: Change missing_docs,unreachable_pub to warn
Closes #951
See merge request tpo/core/arti!1470
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`HopNum` will be used in `ClientCirc`'s public API when we refactor
`ClientCirc::start_conversation_last_hop` to use the provided hop rather
than always using the last one.
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Closes #950.
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This warning kind of snuck up on us! (See #748) For now, let's
disable it. (I've cleaned it up in a couple of examples, since
those are meant to be more idiomatic and user-facing.)
Closes #748.
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Apparently cargo fmt doesn't like these, which my perl rune didn't
delete.
This commit is precisely the result of `cargo fmt`.
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The feature we want is `#[doc = include_str!("README.md")]`, which is
stable since 1.54 and our MSRV is now 1.56.
This commit is precisely the result of the following Perl rune:
perl -i~ -0777 -pe 's{(^//!(?!.*\@\@).*\n)+}{#![doc = include_str!("../README.md")]\n}m' crates/*/src/lib.rs
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As per
https://gitlab.torproject.org/tpo/core/arti/-/merge_requests/657#note_2826167
This makes some lines too long; I will run rustfmt in a separate
commit for clarity.
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We want to clarify that the tor-proto crate should only know _how_
its objects behave, not _why they behave that way_. (In other
words, we can have a "padding strategy" setting on a channel, but
not a "general usage" setting.)
Closes #531.
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This does not yet make sure that `SecretBuf` is used where it
_should_ be, but at least it ensures that most uses of `SecretBytes`
will indeed act as intended, and make sure that whatever they
contain is zeroized.
It requires some corresponding changes to method calls for
correctness and type conformance.
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Update all lint blocks
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As per
https://gitlab.torproject.org/tpo/core/arti/-/merge_requests/586#note_2814276
Change names and comments and docs everywhere.
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This was the result of:
maint/add_warning crates/*/src/{lib,main}.rs
and then manually curating the results.
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The type of ret.map_err(codec_err_to_chan)? is (). ISTM that
writing `let () = ` makes it clear that there is nothing there,
but the lint forbids this.
This lint is warn by default and trips here for me on current nightly.
It seems wrong to me. We should be able to make it clear to the
reader that there is nothing here - note how this differs from the
lines below where Ready contains msg. A let () binding is a good way
to do that.
I think the lint allow ought to be added everywhere, but that doesn't
seem easy right now - see this issue about maint/add_warning:
https://gitlab.torproject.org/tpo/core/arti/-/issues/469
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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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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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Previously coarsetime and the traffic-timestamp feature were
enabled, since they were only required for a small corner of the
guardmgr algorithm.
But in 1.0 and beyond we'll be adding a bunch of other features (eg,
netflow padding, DoS prevention) that will need coarsetime all over
the place.
And since we're going to be doing coarsetime all over the place, the
previous justification for making traffic-timestamping optional (the
tiny performance hit) is no longer relevant.
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This exception is no longer necessary now that the underlying CI bug
is fixed.
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Closes #338.
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We need this for the circuit timeout estimator (#57). It needs to
know "how recently have we got some incoming traffic", so that it
can tell whether a circuit has truly timed out, or whether the
entire network is down.
I'm implementing this with coarsetime, since we need to update these
in response to every single incoming cell, and we need the timestamp
operation to be _fast_.
(This reinstates an earlier commit, f30b2280, which I reverted
because we didn't need it at the time.)
Closes #179.
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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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