zenoh-link-commons 1.3.1

Internal crate for zenoh.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140

//
// Copyright (c) 2022 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 alloc::{borrow::Cow, boxed::Box, sync::Arc, vec::Vec};
use core::{
    fmt,
    hash::{Hash, Hasher},
    ops::Deref,
};

use async_trait::async_trait;
use zenoh_buffers::{reader::HasReader, writer::HasWriter};
use zenoh_codec::{RCodec, WCodec, Zenoh080};
use zenoh_protocol::{
    core::{EndPoint, Locator},
    transport::{BatchSize, TransportMessage},
};
use zenoh_result::{zerror, ZResult};

use crate::LinkAuthId;

/*************************************/
/*             MANAGER               */
/*************************************/
#[async_trait]
pub trait LinkManagerMulticastTrait: Send + Sync {
    async fn new_link(&self, endpoint: &EndPoint) -> ZResult<LinkMulticast>;
}

pub type LinkManagerMulticast = Arc<dyn LinkManagerMulticastTrait>;

/*************************************/
/*              LINK                 */
/*************************************/
#[derive(Clone)]
pub struct LinkMulticast(pub Arc<dyn LinkMulticastTrait>);

#[async_trait]
pub trait LinkMulticastTrait: Send + Sync {
    fn get_mtu(&self) -> BatchSize;
    fn get_src(&self) -> &Locator;
    fn get_dst(&self) -> &Locator;
    fn get_auth_id(&self) -> &LinkAuthId;
    fn is_reliable(&self) -> bool;
    async fn write(&self, buffer: &[u8]) -> ZResult<usize>;
    async fn write_all(&self, buffer: &[u8]) -> ZResult<()>;
    async fn read<'a>(&'a self, buffer: &mut [u8]) -> ZResult<(usize, Cow<'a, Locator>)>;
    async fn close(&self) -> ZResult<()>;
}

impl LinkMulticast {
    pub async fn send(&self, msg: &TransportMessage) -> ZResult<usize> {
        // Create the buffer for serializing the message
        let mut buff = Vec::new();

        let codec = Zenoh080::new();
        let mut writer = buff.writer();

        codec
            .write(&mut writer, msg)
            .map_err(|_| zerror!("Encoding error on link: {}", self))?;

        // Send the message on the link
        self.0.write_all(buff.as_slice()).await?;

        Ok(buff.len())
    }

    pub async fn recv(&self) -> ZResult<(TransportMessage, Locator)> {
        // Read the message
        let mut buffer = zenoh_buffers::vec::uninit(self.get_mtu() as usize);
        let (n, locator) = self.read(&mut buffer).await?;
        buffer.truncate(n);

        let codec = Zenoh080::new();
        let mut reader = buffer.reader();

        let msg: TransportMessage = codec
            .read(&mut reader)
            .map_err(|_| zerror!("Invalid Message: Decoding error on link: {}", self))?;

        Ok((msg, locator.into_owned()))
    }
}

impl Deref for LinkMulticast {
    type Target = Arc<dyn LinkMulticastTrait>;
    #[inline]
    fn deref(&self) -> &Self::Target {
        &self.0
    }
}

impl Eq for LinkMulticast {}

impl PartialEq for LinkMulticast {
    fn eq(&self, other: &Self) -> bool {
        self.get_src() == other.get_src() && self.get_dst() == other.get_dst()
    }
}

impl Hash for LinkMulticast {
    fn hash<H: Hasher>(&self, state: &mut H) {
        self.get_src().hash(state);
        self.get_dst().hash(state);
    }
}

impl fmt::Display for LinkMulticast {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "{} => {}", self.get_src(), self.get_dst())
    }
}

impl fmt::Debug for LinkMulticast {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        f.debug_struct("Link")
            .field("src", &self.get_src())
            .field("dst", &self.get_dst())
            .field("mtu", &self.get_mtu())
            .field("is_reliable", &self.is_reliable())
            .finish()
    }
}

impl From<Arc<dyn LinkMulticastTrait>> for LinkMulticast {
    fn from(link: Arc<dyn LinkMulticastTrait>) -> LinkMulticast {
        LinkMulticast(link)
    }
}