embedded-nal-async-xtra

Hosts a bunch of traits which hopefully will be upstreamed into embedded-nal-async soon - in one shape or another.

Justification

These traits are necessary to unlock the full functionality of some crates in edge-net. Namely:

• edge-mdns - needs UDP multicast capabilities
• edge-dhcp - needs raw ethernet socket capabilities or at least sending/receiving UDP packets to/from peers identified by their MAC addresses rather than by their IP addresses
• edge-http - (full server only) needs a way to bind to a server-side TCP socket

TCP traits

• TcpListen
  • Server-side TCP socket similar in spirit to STD's std::net::TcpListener::bind bind method
• TcpAccept
  • Server-side TCP socket similar in spirit to STD's std::net::TcpListener struct

UDP traits

• Multicast
  • Extra trait for UDP sockets allowing subscription to multicast groups
• UnconnectedUdpWithMac
  • Extra trait for unconnected UDP sockets allowing broadcasting packets to specific Ethernet MACs
  • Additionally - when receiving packets - this trait provides the sender's MAC in addition to its socket address

Traits for sending/receiving raw ethernet payloads (a.k.a. raw sockets)

• RawStack
  • Similar in spirit to UdpStack, yet allowing sending/receiving complete IPv4 and IPv6 frames, rather than just UDP packets
• RawSocket
  • The socket type for RawStack. Similar in spirit to UnconnectedUdp