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net: Add take_error to TcpSocket and TcpStream #4739

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merged 2 commits into from Jun 3, 2022

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mxinden
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@mxinden mxinden commented Jun 3, 2022

Motivation

When manually creating a TcpSocket or TcpStream e.g. via tokio::net::TcpStream::try_from one should be able to check for errors after awaiting the connection to be writable (writable()) before assuming the connection to be successfully established.

This is needed e.g. in rust-libp2p, see libp2p/rust-libp2p#2458.

Solution

The first commit reintroduces #4364 which first merged but later on reverted in #4392. See also #4392 (comment).

The second commit adds the same method to TcpStream.

Tagging @taiki-e as the initial author.

@Darksonn Darksonn added A-tokio Area: The main tokio crate M-net Module: tokio/net labels Jun 3, 2022
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Thanks!

@Darksonn Darksonn merged commit 42b4c27 into tokio-rs:master Jun 3, 2022
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mxinden commented Jun 6, 2022

Thanks a lot, both for the quick merge and for the general maintenance! 🙏

crapStone pushed a commit to Calciumdibromid/CaBr2 that referenced this pull request Jun 11, 2022
This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [tokio](https://tokio.rs) ([source](https://github.com/tokio-rs/tokio)) | dependencies | minor | `1.18.2` -> `1.19.1` |
| [tokio](https://tokio.rs) ([source](https://github.com/tokio-rs/tokio)) | dev-dependencies | minor | `1.18.2` -> `1.19.1` |

---

### Release Notes

<details>
<summary>tokio-rs/tokio</summary>

### [`v1.19.1`](https://github.com/tokio-rs/tokio/releases/tag/tokio-1.19.1)

[Compare Source](tokio-rs/tokio@tokio-1.19.0...tokio-1.19.1)

##### 1.19.1 (June 5, 2022)

This release fixes a bug in `Notified::enable`. ([#&#8203;4747])

[#&#8203;4747]: tokio-rs/tokio#4747

### [`v1.19.0`](https://github.com/tokio-rs/tokio/releases/tag/tokio-1.19.0)

[Compare Source](tokio-rs/tokio@tokio-1.18.2...tokio-1.19.0)

##### 1.19.0 (June 3, 2022)

##### Added

-   runtime: add `is_finished` method for `JoinHandle` and `AbortHandle` ([#&#8203;4709])
-   runtime: make global queue and event polling intervals configurable ([#&#8203;4671])
-   sync: add `Notified::enable` ([#&#8203;4705])
-   sync: add `watch::Sender::send_if_modified` ([#&#8203;4591])
-   sync: add resubscribe method to broadcast::Receiver ([#&#8203;4607])
-   net: add `take_error` to `TcpSocket` and `TcpStream` ([#&#8203;4739])

##### Changed

-   io: refactor out usage of Weak in the io handle ([#&#8203;4656])

##### Fixed

-   macros: avoid starvation in `join!` and `try_join!` ([#&#8203;4624])

##### Documented

-   runtime: clarify semantics of tasks outliving `block_on` ([#&#8203;4729])
-   time: fix example for `MissedTickBehavior::Burst` ([#&#8203;4713])

##### Unstable

-   metrics: correctly update atomics in `IoDriverMetrics` ([#&#8203;4725])
-   metrics: fix compilation with unstable, process, and rt, but without net ([#&#8203;4682])
-   task: add `#[track_caller]` to `JoinSet`/`JoinMap` ([#&#8203;4697])
-   task: add `Builder::{spawn_on, spawn_local_on, spawn_blocking_on}` ([#&#8203;4683])
-   task: add `consume_budget` for cooperative scheduling ([#&#8203;4498])
-   task: add `join_set::Builder` for configuring `JoinSet` tasks ([#&#8203;4687])
-   task: update return value of `JoinSet::join_one` ([#&#8203;4726])

[#&#8203;4498]: tokio-rs/tokio#4498

[#&#8203;4591]: tokio-rs/tokio#4591

[#&#8203;4607]: tokio-rs/tokio#4607

[#&#8203;4624]: tokio-rs/tokio#4624

[#&#8203;4656]: tokio-rs/tokio#4656

[#&#8203;4671]: tokio-rs/tokio#4671

[#&#8203;4682]: tokio-rs/tokio#4682

[#&#8203;4683]: tokio-rs/tokio#4683

[#&#8203;4687]: tokio-rs/tokio#4687

[#&#8203;4697]: tokio-rs/tokio#4697

[#&#8203;4705]: tokio-rs/tokio#4705

[#&#8203;4709]: tokio-rs/tokio#4709

[#&#8203;4713]: tokio-rs/tokio#4713

[#&#8203;4725]: tokio-rs/tokio#4725

[#&#8203;4726]: tokio-rs/tokio#4726

[#&#8203;4729]: tokio-rs/tokio#4729

[#&#8203;4739]: tokio-rs/tokio#4739

</details>

---

### Configuration

📅 **Schedule**: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied.

 **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about these updates again.

---

 - [x] <!-- rebase-check -->If you want to rebase/retry this PR, click this checkbox.

---

This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).

Co-authored-by: cabr2-bot <cabr2.help@gmail.com>
Reviewed-on: https://codeberg.org/Calciumdibromid/CaBr2/pulls/1394
Reviewed-by: crapStone <crapstone@noreply.codeberg.org>
Co-authored-by: Calciumdibromid Bot <cabr2_bot@noreply.codeberg.org>
Co-committed-by: Calciumdibromid Bot <cabr2_bot@noreply.codeberg.org>
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