btp 0.1.4

A rust library of, a lightweight protocol, Blog Transfer Protocol.
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
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167

use super::socket::{BtpConfig, BtpSocket};
use std::future::Future;
use std::net::SocketAddr;
use tokio::net::{TcpListener, TcpStream};

#[cfg(feature = "tls")]
use std::sync::Arc;

type Error = Box<dyn std::error::Error + Send + Sync>;

pub trait AsListener {
    fn accept(&self) -> impl Future<Output = Result<(TcpStream, SocketAddr), std::io::Error>>;
}

#[cfg(feature = "tls")]
pub struct BtpListenerTls<Listener: AsListener> {
    pub listener: Listener,
    pub btp_conf: BtpConfig,
    pub tls_conf: Arc<rustls::ServerConfig>,
}

pub struct BtpListener<Listener: AsListener> {
    pub listener: Listener,
    pub btp_conf: BtpConfig,
}

impl AsListener for TcpListener {
    fn accept(&self) -> impl Future<Output = Result<(TcpStream, SocketAddr), std::io::Error>> {
        return self.accept();
    }
}

mod _impl {

    use tokio::{
        io::{ReadHalf, WriteHalf},
        spawn,
    };

    use super::*;

    impl<L: AsListener> BtpListener<L> {
        pub async fn from(listener: L, btp_conf: BtpConfig) -> Self {
            BtpListener { listener, btp_conf }
        }

        pub async fn accept(
            &self,
        ) -> Result<BtpSocket<ReadHalf<TcpStream>, WriteHalf<TcpStream>, std::net::SocketAddr>, Error>
        {
            let (socket, peer) = self.listener.accept().await?;
            let me = BtpConfig {
                ver: self.btp_conf.ver,
                addr: self.btp_conf.addr,
            };
            let mut socket = BtpSocket::from(socket, me, peer);
            let mut inner = socket.inner.clone();
            let sender = socket.queue.as_ref().unwrap().0.clone();
            spawn(async move {
                loop {
                    match inner.read().await {
                        Ok(packet) => {
                            sender.send(packet).await.unwrap();
                        }
                        Err(e) => {
                            eprintln!("Couldn't send the packet: {}", e);
                        }
                    };
                }
            });
            Ok(socket)
        }
    }
}

#[cfg(feature = "tls")]
mod _impl_tls {
    use crate::{
        VERSION,
        message::{BtpPackage, StatusCode},
    };

    use super::*;
    use rustls::ServerConfig;
    use std::{
        sync::{
            Arc,
            atomic::{AtomicBool, Ordering},
        },
        time::Duration,
    };
    use tokio::{
        io::{ReadHalf, WriteHalf},
        spawn,
        time::sleep,
    };
    use tokio_rustls::{TlsAcceptor, server::TlsStream};

    impl<L: AsListener> BtpListenerTls<L> {
        pub async fn from(listener: L, btp_conf: BtpConfig, tls_conf: Arc<ServerConfig>) -> Self {
            BtpListenerTls {
                listener,
                btp_conf,
                tls_conf,
            }
        }

        pub async fn accept(
            &self,
        ) -> Result<
            BtpSocket<
                ReadHalf<TlsStream<TcpStream>>,
                WriteHalf<TlsStream<TcpStream>>,
                std::net::SocketAddr,
            >,
            Error,
        > {
            let acceptor = TlsAcceptor::from(self.tls_conf.clone());
            let (socket, peer) = self.listener.accept().await?;

            let tls_stream = acceptor.accept(socket).await?;
            let conf = BtpConfig {
                ver: VERSION,
                addr: peer,
            };
            let mut socket = BtpSocket::from(tls_stream, conf, peer);
            let clone = socket.copy_it();
            let mut clone_t = socket.copy_it();
            let sender = socket.queue.as_ref().unwrap().0.clone();
            let mut inner = socket.inner.clone();
            let close = Arc::new(AtomicBool::new(true));
            let close_r = Arc::clone(&close);
            let close_t = Arc::clone(&close);
            spawn(async move {
                sleep(Duration::from_secs(25)).await;
                if close_r.load(Ordering::SeqCst) {
                    clone.shutdown().await.unwrap();
                } else {
                    close_r.store(true, Ordering::SeqCst);
                }
            });
            spawn(async move {
                loop {
                    match inner.read().await {
                        Ok(packet) => {
                            if packet.header.get_sc() == StatusCode::OkieDokie
                                && packet.body1 == "okie"
                            {
                                close_t.store(false, Ordering::SeqCst);
                                clone_t
                                    .write(BtpPackage::dokie(clone_t.btp_conf.ver))
                                    .await
                                    .unwrap();
                            } else {
                                sender.send(packet).await.unwrap();
                            }
                        }
                        Err(e) => {
                            eprintln!("Couldn't send the packet: {}", e);
                        }
                    };
                }
            });
            Ok(socket)
        }
    }
}