zenoh_codec/transport/
keepalive.rs

//
// Copyright (c) 2023 ZettaScale Technology
//
// This program and the accompanying materials are made available under the
// terms of the Eclipse Public License 2.0 which is available at
// http://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0
// which is available at https://www.apache.org/licenses/LICENSE-2.0.
//
// SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
//
// Contributors:
//   ZettaScale Zenoh Team, <zenoh@zettascale.tech>
//
use zenoh_buffers::{
    reader::{DidntRead, Reader},
    writer::{DidntWrite, Writer},
};
use zenoh_protocol::{
    common::imsg,
    transport::{
        id,
        keepalive::{flag, KeepAlive},
    },
};

use crate::{common::extension, RCodec, WCodec, Zenoh080, Zenoh080Header};

impl<W> WCodec<&KeepAlive, &mut W> for Zenoh080
where
    W: Writer,
{
    type Output = Result<(), DidntWrite>;

    fn write(self, writer: &mut W, x: &KeepAlive) -> Self::Output {
        let KeepAlive = x;

        // Header
        let header = id::KEEP_ALIVE;
        self.write(&mut *writer, header)?;
        Ok(())
    }
}

impl<R> RCodec<KeepAlive, &mut R> for Zenoh080
where
    R: Reader,
{
    type Error = DidntRead;

    fn read(self, reader: &mut R) -> Result<KeepAlive, Self::Error> {
        let header: u8 = self.read(&mut *reader)?;
        let codec = Zenoh080Header::new(header);
        codec.read(reader)
    }
}

impl<R> RCodec<KeepAlive, &mut R> for Zenoh080Header
where
    R: Reader,
{
    type Error = DidntRead;

    fn read(self, reader: &mut R) -> Result<KeepAlive, Self::Error> {
        if imsg::mid(self.header) != id::KEEP_ALIVE {
            return Err(DidntRead);
        }

        // Extensions
        let has_ext = imsg::has_flag(self.header, flag::Z);
        if has_ext {
            extension::skip_all(reader, "Unknown KeepAlive ext")?;
        }

        Ok(KeepAlive)
    }
}
zenoh_codec/transport/keepalive.rs

zenoh_codec/transport/
keepalive.rs
