simple_pub_sub/server/
mod.rs

1mod client_handler;
2use crate::topics;
3use log::error;
4use log::info;
5use std::fs::File;
6use std::io::Read;
7use tokio::net::TcpListener;
8use tokio::net::UnixListener;
9use tokio_native_tls::native_tls::{Identity, TlsAcceptor};
10
11pub trait ServerTrait {
12    fn start(&self) -> impl std::future::Future<Output = Result<(), tokio::io::Error>> + Send;
13}
14pub struct Tcp {
15    pub host: String,
16    pub port: u16,
17    pub cert: Option<String>,
18    pub cert_password: Option<String>,
19}
20
21impl ServerTrait for Tcp {
22    async fn start(&self) -> Result<(), tokio::io::Error> {
23        if let Some(cert) = &self.cert {
24            start_tls_server(
25                self.host.clone(),
26                self.port,
27                cert.clone(),
28                self.cert_password.clone(),
29            )
30            .await
31        } else {
32            start_tcp_server(format!("{}:{}", self.host, self.port)).await
33        }
34    }
35}
36pub struct Unix {
37    pub path: String,
38}
39
40impl ServerTrait for Unix {
41    async fn start(&self) -> Result<(), tokio::io::Error> {
42        start_unix_server(self.path.clone()).await
43    }
44}
45impl Drop for Unix {
46    fn drop(&mut self) {
47        if std::path::Path::new(&self.path).exists() {
48            std::fs::remove_file(&self.path).unwrap();
49        }
50    }
51}
52
53pub enum ServerType {
54    Tcp(Tcp),
55    Unix(Unix),
56}
57impl ServerTrait for ServerType {
58    async fn start(&self) -> Result<(), tokio::io::Error> {
59        match self {
60            ServerType::Tcp(tcp) => tcp.start().await,
61            ServerType::Unix(unix) => unix.start().await,
62        }
63    }
64}
65
66pub struct Server {
67    pub server_type: ServerType,
68}
69
70impl Server {
71    pub async fn start(&self) -> Result<(), tokio::io::Error> {
72        self.server_type.start().await
73    }
74}
75
76/// Started a tls server on the given address with the given certificate (.pfx file)
77async fn start_tls_server(
78    host: String,
79    port: u16,
80    cert: String,
81    cert_password: Option<String>,
82) -> Result<(), tokio::io::Error> {
83    // Load TLS identity (certificate and private key)
84
85    let mut file = match File::open(&cert) {
86        Ok(file) => file,
87        Err(e) => {
88            error!("could not open identity file: {}: {}", cert, e);
89            return Err(tokio::io::Error::new(
90                tokio::io::ErrorKind::Other,
91                "could not open identity file",
92            ));
93        }
94    };
95    let mut identity_vec = vec![];
96    file.read_to_end(&mut identity_vec)?;
97
98    let identity: Identity;
99    if let Some(cert_password) = cert_password {
100        identity = match Identity::from_pkcs12(&identity_vec, cert_password.as_str()) {
101            Ok(identity) => identity,
102            Err(e) => {
103                error!("could not parse identity file: {}", e);
104                return Err(tokio::io::Error::new(tokio::io::ErrorKind::Other, e));
105            }
106        };
107    } else {
108        identity = match Identity::from_pkcs12(&identity_vec, "") {
109            Ok(identity) => identity,
110            Err(e) => {
111                error!("could not parse identity file: {}", e);
112                return Err(tokio::io::Error::new(tokio::io::ErrorKind::Other, e));
113            }
114        };
115    }
116
117    let acceptor = TlsAcceptor::builder(identity)
118        .build()
119        .expect("cannot create TLS acceptor");
120    let acceptor = tokio_native_tls::TlsAcceptor::from(acceptor);
121
122    // Bind TCP listener
123    let listener = TcpListener::bind(format!("{host}:{port}"))
124        .await
125        .expect("cannot bind to address");
126
127    info!("Server listening on port 4433");
128    let tx = topics::get_global_broadcaster();
129
130    let _topic_handler = tokio::spawn(topics::topic_manager(tx.clone()));
131
132    loop {
133        let (stream, addr) = listener.accept().await?;
134        info!("Accepted connection from {:?}", addr);
135        let acceptor = acceptor.clone();
136        let tls_stream = match acceptor.accept(stream).await {
137            Ok(stream) => stream,
138            Err(e) => {
139                error!("could not accept TLS connection: {}", e);
140                continue;
141            }
142        };
143        client_handler::handle_client(tls_stream, tx.clone()).await;
144    }
145}
146
147/// Starts a tcp server on the given address
148async fn start_tcp_server(addr: String) -> Result<(), tokio::io::Error> {
149    let listener = TcpListener::bind(&addr).await?;
150    info!("Listening on: {}", addr);
151    info!("getting global broadcaster");
152
153    let tx = topics::get_global_broadcaster();
154
155    let _topic_handler = tokio::spawn(topics::topic_manager(tx.clone()));
156
157    loop {
158        let (socket, addr) = listener.accept().await?;
159        info!("addr is: {addr}");
160        client_handler::handle_client(socket, tx.clone()).await;
161    }
162}
163
164/// Starts a unix server on the given path
165async fn start_unix_server(path: String) -> Result<(), tokio::io::Error> {
166    if std::path::Path::new(&path).exists() {
167        std::fs::remove_file(path.clone())?;
168    }
169
170    let listener = UnixListener::bind(&path)?;
171    info!("Listening on: {}", path);
172    info!("getting global broadcaster");
173    let tx = topics::get_global_broadcaster();
174    let _topic_handler = tokio::spawn(topics::topic_manager(tx.clone()));
175    loop {
176        let (socket, addr) = listener.accept().await?;
177        info!("addr is: {:?}", addr.as_pathname());
178        client_handler::handle_client(socket, tx.clone()).await;
179    }
180}
simple_pub_sub/server/mod.rs

simple_pub_sub/server/
mod.rs
