Trait netlink_proto::NetlinkMessageCodec

pub trait NetlinkMessageCodec {
    fn decode<T>(src: &mut BytesMut) -> Result<Option<NetlinkMessage<T>>>
    where
        T: NetlinkDeserializable + Debug;
    fn encode<T>(msg: NetlinkMessage<T>, buf: &mut BytesMut) -> Result<()>
    where
        T: NetlinkSerializable + Debug;
}

Protocol to serialize and deserialize messages to and from datagrams

This is separate from tokio_util::codec::{Decoder, Encoder} as the implementations rely on the buffer containing full datagrams; they won’t work well with simple bytestreams.

Officially there should be exactly one implementation of this, but the audit subsystem ignores way too many rules of the protocol, so they need a separate implementation.

Although one could make a tighter binding between NetlinkMessageCodec and the message types (NetlinkDeserializable+NetlinkSerializable) it can handle, this would put quite some overhead on subsystems that followed the spec - so we simply default to the proper implementation (in Connection) and the audit code needs to overwrite it.

Required Methods

fn decode<T>(src: &mut BytesMut) -> Result<Option<NetlinkMessage<T>>> where
    T: NetlinkDeserializable + Debug, 

Decode message of given type from datagram payload

There might be more than one message; this needs to be called until it either returns Ok(None) or an error.

fn encode<T>(msg: NetlinkMessage<T>, buf: &mut BytesMut) -> Result<()> where
    T: NetlinkSerializable + Debug, 

Encode message to (datagram) buffer

Implementors

impl NetlinkMessageCodec for NetlinkCodec