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# async-net
[](
https://github.com/smol-rs/async-net/actions)
[](
https://github.com/smol-rs/async-net)
[](
https://crates.io/crates/async-net)
[](
https://docs.rs/async-net)
Async networking primitives for TCP/UDP/Unix communication.
This crate is an async version of [`std::net`] and [`std::os::unix::net`].
[`std::net`]: https://doc.rust-lang.org/std/net/index.html
[`std::os::unix::net`]: https://doc.rust-lang.org/std/os/unix/net/index.html
## Implementation
This crate uses [`async-io`] for async I/O and [`blocking`] for DNS lookups.
[`async-io`]: https://docs.rs/async-io
[`blocking`]: https://docs.rs/blocking
## Examples
A simple UDP server that echoes messages back to the sender:
```rust
use async_net::UdpSocket;
let socket = UdpSocket::bind("127.0.0.1:8080").await?;
let mut buf = vec![0u8; 1024];
loop {
let (n, addr) = socket.recv_from(&mut buf).await?;
socket.send_to(&buf[..n], &addr).await?;
}
```
## License
Licensed under either of
* Apache License, Version 2.0 ([LICENSE-APACHE](LICENSE-APACHE) or http://www.apache.org/licenses/LICENSE-2.0)
* MIT license ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT)
at your option.
#### Contribution
Unless you explicitly state otherwise, any contribution intentionally submitted
for inclusion in the work by you, as defined in the Apache-2.0 license, shall be
dual licensed as above, without any additional terms or conditions.
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