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Some of the `tor_circmgr::Error` variants will include the `UniqId` of the
corresponding circuit, so we'll need to be able to display it without the
`Circ ` prefix.
Part of #1297
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While looking for differences, we found that C tor always
omits the flags and the hostname from a BEGIN message sent on an
onion service circuit. In torspec!179, we specified that behavior.
This patch brings arti into conformance.
Closes #1077.
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Because dropping a `StreamTarget` causes the circuit reactor to send
an End, the previous do-nothing implementation of `discard()` wasn't
sufficient to cause the request to be ignored without sending an
End.
This commit modifies our "close pending stream" behavior to only
optionally send an End message. To avoid confusion, I'm using a new
`CloseStreamBehavior` enum rather than an `Option<End>`, since we
had previously used `None` in some cases to indicate a default
(misc) end message.
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Now that every state-change function consumes the IncomingStream,
there is no longer any reason to keep track of an internal state
enum.
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This will let avoid some copying inside our HSS code.
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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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Closes #1010.
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For consistency with the other `ClientCirc` APIs,
`ClientCirc::allow_stream_requests` now takes a `HopNum` argument. Upon
receiving an incoming stream request, the reactor now checks if the
request came from the hop specified in `allow_stream_requests` (and if
it came from a different hop, the circuit is closed).
Part of #1009
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Closes #993
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These functions only ever return `Bug` errors.
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received.
`ClientCirc::allow_stream_requests` is now `async` and waits until the
`AwaitIncomingStream` control message is processed by the reactor.
This guarantees that by the time the `allow_stream_requests` future
resolves, the reactor is ready to process BEGIN/BEGIN_DIR/RESOLVE cells.
Previously, the client tasks from allow_stream_requests tests had to
sleep before sending the BEGIN cell to give the reactor time to process
the `AwaitIncomingStream` control message (which tells the reactor to
expect incoming BEGIN/BEGIN_DIR/RESOLVE cells on the circuit).
Fixes #994
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This will enable hidden services to send `RENDEZVOUS1` messages to the
`N`th hop of the circuit rather than the `N + 1`th virtual one (which
can only used after the client and service have completed the
introduction handshake).
This also deprecates `start_conversation_last_hop`.
Closes #959
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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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Now ClientCirc is no longer `Clone`, and the things that need it
to be `Clone` instead return and use an Arc<ClientCirc>
We're doing this so that ClientCirc can participate in the RPC
system, and so that its semantics are more obvious.
Closes #846.
Thanks to the type system, this was a much simpler refactoring than
I had feared it would be.
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It was erroneously created in the wrong place.
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Even though channels are practically changeable, they use locks
internally so that you don't need a `&mut Channel` to send or
receive traffic. It makes sense for reparameterizing the channel to
also use a &self reference.
I'll need this so that I can store channels in an `ByRelayIds<>`
set, and still invoke their reparameterize methods.
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With this change, each individual identity type becomes optional.
The functions that expose them unconditionally are now in a "legacy"
trait that only some downstream types are expected to implement.
There are new convenience APIs in HasRelayIds:
* to return Option<&keytype>,
* to see if one identity-set contains another.
This commit will break several downstream crates! For the
reviewer's convenience, I will put the fixes for those crates into a
series of squash! commits on this one.
tor-netdir
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Revise tor-netdir to accept optional identities. This required some
caveats and workarounds about the cases where we have to deal with a
key type that the tor-netdir code does not currently recognize at
all. If we start to add more identity types in the future, we may
well want more internal indices in this code.
tor-proto
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In order to make tor-proto support optional identities, there were
fewer changes than I thought. Some "check" functions needed to start
looking at "all the ids we want" rather than at "the two known IDs";
they also needed to accommodate that case where we don't have an ID
that we demand.
This change will also help with bridges, since we want to be able to
connect to a bridge without knowing all of its IDs up front.
The protocol currently _requires_ the two current ID types in some
places. To deal with that, I added a new `MissingId` error.
I also removed a couple of unconditional identity accessors for
chanmgr; code should use `target().identity(...)` instead.
tor-chanmgr
-----------
This is an incomplete conversion: it does not at all handle channel
targets without Ed25519 identities yet. It still uses those
identities to index its internal map from identity to channel; but
it gives a new `MissingId` error type if it's given a channel target
that doesn't have one.
We'll want to revise the map type again down the road when we
implement bridges, but I'd rather not step on the channel-padding
work in progress right now.
tor-guardmgr
------------
This change is mostly a matter of constructing owned identity types
more sensibly, rather than unwrapping them directly.
There are some places marked with TODOs where we still depend on
particular identity types, because of how the directory protocol
works. This will need revisiting when we add bridge support here.
tor-circmgr
-----------
These changes are just relatively simple API changes in the tests.
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This change was a bit annoying, since most of this code _can't_ fail,
and so the only reasonable response is to wrap the input in an
internal error... except for one case where we're actually encoding
a caller-provided message, so we _do_ want to wrap the EncodeError
from tor_bytes.
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