This crate provides DynPhy, DynTxToken, and DynRxToken, which are object-safe versions of smoltcp's phy::Device, phy::RxToken, and phy::TxToken.

These Dyn* types are fully-compatible with and blanket-impled over the smoltcp types. They are unfortunately only optimistically zero-alloc (i.e. they may allocate depending on closure sizes).

Examples

The motivating use-case for this functionality is dynamic dispatch over multiple PHY interfaces, e.g. for packet-switching. This crate makes the following possible:

use dyn_phy::DynPhy;
use smoltcp::phy;

let mut loopback = phy::Loopback::new(phy::Medium::Ethernet);
let mut fault_test = phy::FaultInjector::new(phy::Loopback::new(phy::Medium::Ethernet), 0);

// This would not be possible with phy::Device as it is not object-safe:
let mut devs = heapless::Vec::<&mut dyn DynPhy, 8>::new();

devs.push(&mut loopback);
devs.push(&mut fault_test);

for dev in &mut devs {
    println!("{:?}", dev.capabilities());
}