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|
use native_tls::TlsConnector;
use std::io::{Read, Write};
use std::net::{TcpListener, TcpStream};
use std::sync::Arc;
use std::thread::{spawn, JoinHandle};
use crate::configuration::ProxyConfiguration;
pub fn create_proxy(configuration: Arc<ProxyConfiguration>) -> JoinHandle<()> {
let cloned_configuration = Arc::clone(&configuration);
spawn(move || {
run_proxy(cloned_configuration);
})
}
fn run_proxy(configuration: Arc<ProxyConfiguration>) {
let listener = TcpListener::bind(format!("0.0.0.0:{}", configuration.local_port)).unwrap();
println!("Proxy listening on port {}", configuration.local_port);
for stream in listener.incoming() {
match stream {
Ok(stream) => {
let cloned_configuration = Arc::clone(&configuration);
spawn(move || {
handle_client(stream, cloned_configuration);
});
}
Err(e) => {
eprintln!("Failed to accept connection: {}", e);
}
}
}
}
fn handle_client(mut client_stream: TcpStream, configuration: Arc<ProxyConfiguration>) {
let connector = TlsConnector::new().unwrap();
let remote_stream = TcpStream::connect(format!(
"{}:{}",
configuration.remote_domain, configuration.remote_port
))
.unwrap();
let mut remote_stream = connector
.connect(&configuration.remote_domain, remote_stream)
.unwrap();
let mut client_stream_clone = client_stream.try_clone().unwrap();
let mut remote_stream_clone = remote_stream.get_ref().try_clone().unwrap();
let cloned_configuration = Arc::clone(&configuration);
spawn(move || {
forward_stream(&mut client_stream, &mut remote_stream, cloned_configuration);
});
forward_stream(
&mut remote_stream_clone,
&mut client_stream_clone,
configuration,
);
}
fn forward_stream<R: Read, W: Write>(
from: &mut R,
to: &mut W,
configuration: Arc<ProxyConfiguration>,
) {
let mut buffer = [0; 4096];
loop {
match from.read(&mut buffer) {
Ok(0) => break, // EOF
Ok(n) => {
if let Err(e) = to.write_all(&buffer[..n]) {
eprintln!("{} proxy write error: {}", configuration.protocol, e);
break;
}
if let Err(e) = to.flush() {
eprintln!("{} proxy flush error: {}", configuration.protocol, e);
break;
}
}
Err(e) => {
eprintln!("{} proxy read error: {}", configuration.protocol, e);
break;
}
}
}
}
|
