Finishing basic implementation
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source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
|
||||
|
||||
[[package]]
|
||||
name = "winapi-x86_64-pc-windows-gnu"
|
||||
version = "0.4.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
|
||||
|
||||
[[package]]
|
||||
name = "windows-sys"
|
||||
version = "0.32.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "3df6e476185f92a12c072be4a189a0210dcdcf512a1891d6dff9edb874deadc6"
|
||||
dependencies = [
|
||||
"windows_aarch64_msvc",
|
||||
"windows_i686_gnu",
|
||||
"windows_i686_msvc",
|
||||
"windows_x86_64_gnu",
|
||||
"windows_x86_64_msvc",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "windows_aarch64_msvc"
|
||||
version = "0.32.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "d8e92753b1c443191654ec532f14c199742964a061be25d77d7a96f09db20bf5"
|
||||
|
||||
[[package]]
|
||||
name = "windows_i686_gnu"
|
||||
version = "0.32.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "6a711c68811799e017b6038e0922cb27a5e2f43a2ddb609fe0b6f3eeda9de615"
|
||||
|
||||
[[package]]
|
||||
name = "windows_i686_msvc"
|
||||
version = "0.32.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "146c11bb1a02615db74680b32a68e2d61f553cc24c4eb5b4ca10311740e44172"
|
||||
|
||||
[[package]]
|
||||
name = "windows_x86_64_gnu"
|
||||
version = "0.32.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "c912b12f7454c6620635bbff3450962753834be2a594819bd5e945af18ec64bc"
|
||||
|
||||
[[package]]
|
||||
name = "windows_x86_64_msvc"
|
||||
version = "0.32.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "504a2476202769977a040c6364301a3f65d0cc9e3fb08600b2bda150a0488316"
|
||||
|
|
@ -0,0 +1,22 @@
|
|||
[package]
|
||||
name = "rustocat"
|
||||
version = "0.0.1"
|
||||
edition = "2021"
|
||||
description = "Socat in rust with many less features and a configuration file"
|
||||
license = "ISC"
|
||||
|
||||
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
|
||||
|
||||
[dependencies]
|
||||
tokio = { version = "1.17.0", features = ["full"] }
|
||||
futures = "0.3.21"
|
||||
serde = { version = "1.0.136", features = ["derive"] }
|
||||
serde_json = "1.0.79"
|
||||
|
||||
|
||||
[profile.release]
|
||||
opt-level = 'z' # Optimize for size.
|
||||
lto = true # Enable Link Time Optimization
|
||||
codegen-units = 1 # Reduce number of codegen units to increase optimizations.
|
||||
panic = 'abort' # Abort on panic
|
||||
strip = true # Strip symbols from binary*
|
||||
|
|
@ -0,0 +1,7 @@
|
|||
use crate::shutdown::Shutdown;
|
||||
|
||||
pub(crate) struct Listener {
|
||||
pub(crate) shutdown: Shutdown,
|
||||
pub(crate) source: String,
|
||||
pub(crate) target: String,
|
||||
}
|
||||
|
|
@ -0,0 +1,47 @@
|
|||
mod listener;
|
||||
mod shutdown;
|
||||
mod tcp;
|
||||
|
||||
use serde::Deserialize;
|
||||
use std::fs::File;
|
||||
use std::path::Path;
|
||||
use tokio::sync::broadcast;
|
||||
|
||||
#[derive(Debug, Deserialize)]
|
||||
struct Target {
|
||||
source: String,
|
||||
target: String,
|
||||
}
|
||||
|
||||
#[derive(Debug, Deserialize)]
|
||||
struct Config {
|
||||
tcp: Vec<Target>,
|
||||
// udp: Vec<Target>,
|
||||
}
|
||||
|
||||
#[tokio::main]
|
||||
async fn main() {
|
||||
let json_file_path = Path::new("./config.json");
|
||||
let file = File::open(json_file_path).expect("file not found");
|
||||
|
||||
let (notify_shutdown, _) = broadcast::channel(1);
|
||||
|
||||
let config: Config = serde_json::from_reader(file).expect("json parse error");
|
||||
for target in config.tcp {
|
||||
let listener = listener::Listener {
|
||||
shutdown: shutdown::Shutdown::new(notify_shutdown.subscribe()),
|
||||
source: target.source,
|
||||
target: target.target,
|
||||
};
|
||||
tokio::spawn(async move {
|
||||
if let Err(err) = tcp::start_tcp_listener(listener).await {
|
||||
println!("listener error: {}", err);
|
||||
}
|
||||
});
|
||||
}
|
||||
|
||||
// _ = notify_shutdown.send(());
|
||||
loop {
|
||||
tokio::time::sleep(tokio::time::Duration::from_millis(1000 * 1000)).await;
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,49 @@
|
|||
use tokio::sync::broadcast;
|
||||
|
||||
/// Listens for the server shutdown signal.
|
||||
///
|
||||
/// Shutdown is signalled using a `broadcast::Receiver`. Only a single value is
|
||||
/// ever sent. Once a value has been sent via the broadcast channel, the server
|
||||
/// should shutdown.
|
||||
///
|
||||
/// The `Shutdown` struct listens for the signal and tracks that the signal has
|
||||
/// been received. Callers may query for whether the shutdown signal has been
|
||||
/// received or not.
|
||||
#[derive(Debug)]
|
||||
pub(crate) struct Shutdown {
|
||||
/// `true` if the shutdown signal has been received
|
||||
shutdown: bool,
|
||||
|
||||
/// The receive half of the channel used to listen for shutdown.
|
||||
notify: broadcast::Receiver<()>,
|
||||
}
|
||||
|
||||
impl Shutdown {
|
||||
/// Create a new `Shutdown` backed by the given `broadcast::Receiver`.
|
||||
pub(crate) fn new(notify: broadcast::Receiver<()>) -> Shutdown {
|
||||
Shutdown {
|
||||
shutdown: false,
|
||||
notify,
|
||||
}
|
||||
}
|
||||
|
||||
/// Returns `true` if the shutdown signal has been received.
|
||||
pub(crate) fn is_shutdown(&self) -> bool {
|
||||
self.shutdown
|
||||
}
|
||||
|
||||
/// Receive the shutdown notice, waiting if necessary.
|
||||
pub(crate) async fn recv(&mut self) {
|
||||
// If the shutdown signal has already been received, then return
|
||||
// immediately.
|
||||
if self.shutdown {
|
||||
return;
|
||||
}
|
||||
|
||||
// Cannot receive a "lag error" as only one value is ever sent.
|
||||
let _ = self.notify.recv().await;
|
||||
|
||||
// Remember that the signal has been received.
|
||||
self.shutdown = true;
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,51 @@
|
|||
use crate::listener::Listener;
|
||||
use std::error::Error;
|
||||
use tokio::net::{TcpListener, TcpStream};
|
||||
|
||||
#[derive(Debug)]
|
||||
struct TcpHandler {
|
||||
stream: TcpStream,
|
||||
target: String,
|
||||
}
|
||||
|
||||
impl TcpHandler {
|
||||
async fn run(&mut self) -> Result<(), Box<dyn Error>> {
|
||||
let mut stream = TcpStream::connect(&self.target).await?;
|
||||
|
||||
tokio::io::copy_bidirectional(&mut self.stream, &mut stream).await?;
|
||||
|
||||
return Ok(());
|
||||
}
|
||||
}
|
||||
|
||||
pub(crate) async fn start_tcp_listener(
|
||||
mut listener_config: Listener,
|
||||
) -> Result<(), Box<dyn Error>> {
|
||||
println!("start listening on {}", &listener_config.source);
|
||||
let listener = TcpListener::bind(&listener_config.source).await?;
|
||||
|
||||
loop {
|
||||
let (next_socket, _) = tokio::select! {
|
||||
res = listener.accept() => res?,
|
||||
_ = listener_config.shutdown.recv() => {
|
||||
return Ok(());
|
||||
}
|
||||
};
|
||||
println!(
|
||||
"new connection from {} forwarding to {}",
|
||||
next_socket.peer_addr()?,
|
||||
&listener_config.target
|
||||
);
|
||||
let mut handler = TcpHandler {
|
||||
stream: next_socket,
|
||||
target: listener_config.target.clone(),
|
||||
};
|
||||
|
||||
tokio::spawn(async move {
|
||||
// Process the connection. If an error is encountered, log it.
|
||||
if let Err(err) = handler.run().await {
|
||||
println!("connection error {}", err);
|
||||
}
|
||||
});
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,2 @@
|
|||
// For UDP to work, there is some magic required with matches the returning packets
|
||||
// back to the original sender. Idk. how to do that right now, but maybe some day.
|
||||
Loading…
Reference in New Issue