edge-captive 0.1.0

Async + `no_std` + no-alloc implementation of a Captive Portal DNS
Documentation 
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# edge-captive

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Async + `no_std` + no-alloc implementation of a Captive Portal DNS (i.e. a DNS server that resolves every domain name to a fixed IP address).

The implementation is based on the splendid [domain](https://github.com/NLnetLabs/domain) library.

For other protocols, look at the [edge-net](https://github.com/ivmarkov/edge-net) aggregator crate documentation.

## Example

```rust
use core::time::Duration;

use edge_captive::io::run;

use embedded_nal_async::{IpAddr, Ipv4Addr, SocketAddr};

use std_embedded_nal_async::Stack;

use log::*;

fn main() {
    env_logger::init_from_env(
        env_logger::Env::default().filter_or(env_logger::DEFAULT_FILTER_ENV, "info"),
    );

    let stack: Stack = Default::default();

    let mut tx_buf = [0; 1500];
    let mut rx_buf = [0; 1500];

    info!("Running Captive Portal DNS on UDP port 8853...");

    futures_lite::future::block_on(run(
        &stack,
        // Can't use DEFAULT_SOCKET because it uses DNS port 53 which needs root
        SocketAddr::new(IpAddr::V4(Ipv4Addr::UNSPECIFIED), 8853),
        &mut tx_buf,
        &mut rx_buf,
        Ipv4Addr::new(192, 168, 0, 1),
        Duration::from_secs(60),
    ))
    .unwrap();
}
```