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bcc332bd7b
| Author | SHA1 | Date | |
|---|---|---|---|
| bcc332bd7b | |||
| 3eab1ae216 | |||
| 517889f875 |
1
.gitignore
vendored
1
.gitignore
vendored
@ -1,2 +1,3 @@
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/target
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/target
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config.yaml
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config.json
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config.json
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290
Cargo.lock
generated
290
Cargo.lock
generated
@ -2,6 +2,15 @@
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# It is not intended for manual editing.
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@ -141,6 +246,30 @@ dependencies = [
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@ -211,9 +377,9 @@ dependencies = [
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@ -468,18 +663,84 @@ version = "1.0.4"
|
|||||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
checksum = "dcc811dc4066ac62f84f11307873c4850cb653bfa9b1719cee2bd2204a4bc5dd"
|
checksum = "dcc811dc4066ac62f84f11307873c4850cb653bfa9b1719cee2bd2204a4bc5dd"
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "unicode-width"
|
||||||
|
version = "0.1.10"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "c0edd1e5b14653f783770bce4a4dabb4a5108a5370a5f5d8cfe8710c361f6c8b"
|
||||||
|
|
||||||
[[package]]
|
[[package]]
|
||||||
name = "unsafe-libyaml"
|
name = "unsafe-libyaml"
|
||||||
version = "0.2.4"
|
version = "0.2.4"
|
||||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
checksum = "c1e5fa573d8ac5f1a856f8d7be41d390ee973daf97c806b2c1a465e4e1406e68"
|
checksum = "c1e5fa573d8ac5f1a856f8d7be41d390ee973daf97c806b2c1a465e4e1406e68"
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "wasi"
|
||||||
|
version = "0.10.0+wasi-snapshot-preview1"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "1a143597ca7c7793eff794def352d41792a93c481eb1042423ff7ff72ba2c31f"
|
||||||
|
|
||||||
[[package]]
|
[[package]]
|
||||||
name = "wasi"
|
name = "wasi"
|
||||||
version = "0.11.0+wasi-snapshot-preview1"
|
version = "0.11.0+wasi-snapshot-preview1"
|
||||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
|
checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "wasm-bindgen"
|
||||||
|
version = "0.2.84"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "31f8dcbc21f30d9b8f2ea926ecb58f6b91192c17e9d33594b3df58b2007ca53b"
|
||||||
|
dependencies = [
|
||||||
|
"cfg-if",
|
||||||
|
"wasm-bindgen-macro",
|
||||||
|
]
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "wasm-bindgen-backend"
|
||||||
|
version = "0.2.84"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "95ce90fd5bcc06af55a641a86428ee4229e44e07033963a2290a8e241607ccb9"
|
||||||
|
dependencies = [
|
||||||
|
"bumpalo",
|
||||||
|
"log",
|
||||||
|
"once_cell",
|
||||||
|
"proc-macro2",
|
||||||
|
"quote",
|
||||||
|
"syn",
|
||||||
|
"wasm-bindgen-shared",
|
||||||
|
]
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "wasm-bindgen-macro"
|
||||||
|
version = "0.2.84"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "4c21f77c0bedc37fd5dc21f897894a5ca01e7bb159884559461862ae90c0b4c5"
|
||||||
|
dependencies = [
|
||||||
|
"quote",
|
||||||
|
"wasm-bindgen-macro-support",
|
||||||
|
]
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "wasm-bindgen-macro-support"
|
||||||
|
version = "0.2.84"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "2aff81306fcac3c7515ad4e177f521b5c9a15f2b08f4e32d823066102f35a5f6"
|
||||||
|
dependencies = [
|
||||||
|
"proc-macro2",
|
||||||
|
"quote",
|
||||||
|
"syn",
|
||||||
|
"wasm-bindgen-backend",
|
||||||
|
"wasm-bindgen-shared",
|
||||||
|
]
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "wasm-bindgen-shared"
|
||||||
|
version = "0.2.84"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "0046fef7e28c3804e5e38bfa31ea2a0f73905319b677e57ebe37e49358989b5d"
|
||||||
|
|
||||||
[[package]]
|
[[package]]
|
||||||
name = "winapi"
|
name = "winapi"
|
||||||
version = "0.3.9"
|
version = "0.3.9"
|
||||||
@ -496,6 +757,15 @@ version = "0.4.0"
|
|||||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
|
checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
|
||||||
|
|
||||||
|
[[package]]
|
||||||
|
name = "winapi-util"
|
||||||
|
version = "0.1.5"
|
||||||
|
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||||
|
checksum = "70ec6ce85bb158151cae5e5c87f95a8e97d2c0c4b001223f33a334e3ce5de178"
|
||||||
|
dependencies = [
|
||||||
|
"winapi",
|
||||||
|
]
|
||||||
|
|
||||||
[[package]]
|
[[package]]
|
||||||
name = "winapi-x86_64-pc-windows-gnu"
|
name = "winapi-x86_64-pc-windows-gnu"
|
||||||
version = "0.4.0"
|
version = "0.4.0"
|
||||||
|
|||||||
11
Cargo.toml
11
Cargo.toml
@ -1,6 +1,6 @@
|
|||||||
[package]
|
[package]
|
||||||
name = "rustocat"
|
name = "rustocat"
|
||||||
version = "0.0.3"
|
version = "0.1.0"
|
||||||
edition = "2021"
|
edition = "2021"
|
||||||
description = "Socat in rust with many less features and a configuration file"
|
description = "Socat in rust with many less features and a configuration file"
|
||||||
license = "ISC"
|
license = "ISC"
|
||||||
@ -8,13 +8,16 @@ license = "ISC"
|
|||||||
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
|
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
|
||||||
|
|
||||||
[dependencies]
|
[dependencies]
|
||||||
tokio = { version = "1.21.1", features = ["full"] }
|
tokio = { version = "1", features = ["full"] }
|
||||||
futures = "0.3.21"
|
futures = "0.3.21"
|
||||||
serde = { version = "1.0.136", features = ["derive"] }
|
serde = { version = "1", features = ["derive"] }
|
||||||
serde_json = "1.0.79"
|
serde_json = "1"
|
||||||
serde_yaml = "0.9.13"
|
serde_yaml = "0.9.13"
|
||||||
simple-error = "0.2.3"
|
simple-error = "0.2.3"
|
||||||
rand = "0.8.5"
|
rand = "0.8.5"
|
||||||
|
log = "0.4.17"
|
||||||
|
fern = "0.6.1"
|
||||||
|
chrono = "0.4.23"
|
||||||
|
|
||||||
[profile.release]
|
[profile.release]
|
||||||
opt-level = 3 # Optimize for size.
|
opt-level = 3 # Optimize for size.
|
||||||
|
|||||||
@ -7,12 +7,13 @@ Rustocat is a simple socat alternative with way less features, but it has a conf
|
|||||||
Configs can be either yaml or json and can be located in /etc/rustocat.{yaml|json} or in the current working directory as config.{yaml|json}.
|
Configs can be either yaml or json and can be located in /etc/rustocat.{yaml|json} or in the current working directory as config.{yaml|json}.
|
||||||
|
|
||||||
```yaml
|
```yaml
|
||||||
tcp:
|
mappings:
|
||||||
- source: 0.0.0.0:2222
|
- udp: false
|
||||||
|
source: 0.0.0.0:2222
|
||||||
targets: [127.0.0.1:22]
|
targets: [127.0.0.1:22]
|
||||||
```
|
```
|
||||||
|
|
||||||
Currently only TCP is supported, UDP/Unix Socket support might be added later.
|
There is support for UDP and TCP sockets. Each socket can have multiple targets.
|
||||||
|
|
||||||
When multiple targets are set, it will randomly pick one of them.
|
When multiple targets are set, it will randomly pick one of them.
|
||||||
|
|
||||||
|
|||||||
@ -1,5 +0,0 @@
|
|||||||
tcp:
|
|
||||||
- source: 127.0.0.1:4422
|
|
||||||
targets: [127.0.0.1:22, fury.infra.stamm.me:22]
|
|
||||||
- source: 127.0.0.1:4423
|
|
||||||
targets: [127.0.0.1:22, fury.infra.stamm.me:22]
|
|
||||||
@ -1,9 +1,9 @@
|
|||||||
use crate::shutdown::Shutdown;
|
use crate::shutdown::ShutdownReceiver;
|
||||||
use std::sync::Arc;
|
use std::sync::Arc;
|
||||||
use tokio::sync::RwLock;
|
use tokio::sync::RwLock;
|
||||||
|
|
||||||
pub(crate) struct Listener {
|
pub(crate) struct Listener {
|
||||||
pub(crate) shutdown: Shutdown,
|
pub(crate) shutdown: ShutdownReceiver,
|
||||||
pub(crate) source: String,
|
pub(crate) source: String,
|
||||||
pub(crate) targets: Arc<RwLock<Vec<String>>>,
|
pub(crate) targets: Arc<RwLock<Vec<String>>>,
|
||||||
}
|
}
|
||||||
|
|||||||
52
src/main.rs
52
src/main.rs
@ -3,6 +3,7 @@ mod shutdown;
|
|||||||
mod tcp;
|
mod tcp;
|
||||||
mod udp;
|
mod udp;
|
||||||
|
|
||||||
|
use log::{debug, error, info, warn};
|
||||||
use serde::Deserialize;
|
use serde::Deserialize;
|
||||||
use simple_error::bail;
|
use simple_error::bail;
|
||||||
use std::collections::{HashMap, HashSet};
|
use std::collections::{HashMap, HashSet};
|
||||||
@ -13,6 +14,8 @@ use std::sync::Arc;
|
|||||||
use tokio::signal::unix::{signal, SignalKind};
|
use tokio::signal::unix::{signal, SignalKind};
|
||||||
use tokio::sync::{broadcast, RwLock};
|
use tokio::sync::{broadcast, RwLock};
|
||||||
|
|
||||||
|
pub type Result<T> = std::result::Result<T, Box<dyn Error>>;
|
||||||
|
|
||||||
#[derive(Debug, Deserialize)]
|
#[derive(Debug, Deserialize)]
|
||||||
struct Target {
|
struct Target {
|
||||||
udp: Option<bool>,
|
udp: Option<bool>,
|
||||||
@ -25,21 +28,21 @@ struct Config {
|
|||||||
mappings: Vec<Target>,
|
mappings: Vec<Target>,
|
||||||
}
|
}
|
||||||
|
|
||||||
fn load_yaml(path: &Path) -> Result<Config, Box<dyn Error>> {
|
fn load_yaml(path: &Path) -> Result<Config> {
|
||||||
let file = File::open(path)?;
|
let file = File::open(path)?;
|
||||||
let config: Config = serde_yaml::from_reader(file).expect("Failed to parse!"); //TODO: Print path
|
let config: Config = serde_yaml::from_reader(file).expect("Failed to parse!"); //TODO: Print path
|
||||||
|
|
||||||
return Ok(config);
|
return Ok(config);
|
||||||
}
|
}
|
||||||
|
|
||||||
fn load_json(path: &Path) -> Result<Config, Box<dyn Error>> {
|
fn load_json(path: &Path) -> Result<Config> {
|
||||||
let file = File::open(path)?;
|
let file = File::open(path)?;
|
||||||
let config: Config = serde_json::from_reader(file).expect("Failed to parse!"); //TODO: Print path
|
let config: Config = serde_json::from_reader(file).expect("Failed to parse!"); //TODO: Print path
|
||||||
|
|
||||||
return Ok(config);
|
return Ok(config);
|
||||||
}
|
}
|
||||||
|
|
||||||
fn load_config() -> Result<Config, Box<dyn Error>> {
|
fn load_config() -> Result<Config> {
|
||||||
for path in [
|
for path in [
|
||||||
"config.yaml",
|
"config.yaml",
|
||||||
"config.json",
|
"config.json",
|
||||||
@ -63,13 +66,28 @@ fn load_config() -> Result<Config, Box<dyn Error>> {
|
|||||||
|
|
||||||
// #[derive(Debug)]
|
// #[derive(Debug)]
|
||||||
struct ActiveListener {
|
struct ActiveListener {
|
||||||
udp: bool,
|
|
||||||
notify_shutdown: broadcast::Sender<()>,
|
notify_shutdown: broadcast::Sender<()>,
|
||||||
targets: Arc<RwLock<Vec<String>>>,
|
targets: Arc<RwLock<Vec<String>>>,
|
||||||
}
|
}
|
||||||
|
|
||||||
#[tokio::main]
|
#[tokio::main]
|
||||||
async fn main() -> Result<(), Box<dyn std::error::Error>> {
|
async fn main() -> Result<()> {
|
||||||
|
fern::Dispatch::new()
|
||||||
|
.format(|out, message, record| {
|
||||||
|
out.finish(format_args!(
|
||||||
|
"{}[{}][{}] {}",
|
||||||
|
chrono::Local::now().format("[%Y-%m-%d][%H:%M:%S]"),
|
||||||
|
record.target(),
|
||||||
|
record.level(),
|
||||||
|
message
|
||||||
|
))
|
||||||
|
})
|
||||||
|
// Add blanket level filter -
|
||||||
|
.level(log::LevelFilter::Info)
|
||||||
|
.level_for("rustocat", log::LevelFilter::Trace)
|
||||||
|
.chain(std::io::stdout())
|
||||||
|
.apply()?;
|
||||||
|
|
||||||
let mut listeners: HashMap<String, ActiveListener> = HashMap::new();
|
let mut listeners: HashMap<String, ActiveListener> = HashMap::new();
|
||||||
let mut sighup_stream = signal(SignalKind::hangup())?;
|
let mut sighup_stream = signal(SignalKind::hangup())?;
|
||||||
|
|
||||||
@ -108,7 +126,7 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
|
|||||||
}
|
}
|
||||||
|
|
||||||
if invalid {
|
if invalid {
|
||||||
println!("Found invalid targets! Adjusting!");
|
warn!("Found invalid targets! Adjusting!");
|
||||||
let mut w = listener.targets.write().await;
|
let mut w = listener.targets.write().await;
|
||||||
*w = target.targets;
|
*w = target.targets;
|
||||||
}
|
}
|
||||||
@ -118,11 +136,10 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
|
|||||||
let listener = ActiveListener {
|
let listener = ActiveListener {
|
||||||
notify_shutdown: notify_shutdown,
|
notify_shutdown: notify_shutdown,
|
||||||
targets: Arc::new(RwLock::new(target.targets)),
|
targets: Arc::new(RwLock::new(target.targets)),
|
||||||
udp: target.udp == None || target.udp == Some(false),
|
|
||||||
};
|
};
|
||||||
|
|
||||||
let l = listener::Listener {
|
let l = listener::Listener {
|
||||||
shutdown: shutdown::Shutdown::new(listener.notify_shutdown.subscribe()),
|
shutdown: shutdown::ShutdownReceiver::new(listener.notify_shutdown.subscribe()),
|
||||||
source: target.source.clone(),
|
source: target.source.clone(),
|
||||||
targets: listener.targets.clone(),
|
targets: listener.targets.clone(),
|
||||||
};
|
};
|
||||||
@ -130,11 +147,11 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
|
|||||||
tokio::spawn(async move {
|
tokio::spawn(async move {
|
||||||
if target.udp == None || target.udp == Some(false) {
|
if target.udp == None || target.udp == Some(false) {
|
||||||
if let Err(err) = tcp::start_tcp_listener(l).await {
|
if let Err(err) = tcp::start_tcp_listener(l).await {
|
||||||
println!("tcp listener error: {}", err);
|
error!("tcp listener error: {}", err);
|
||||||
}
|
}
|
||||||
} else {
|
} else {
|
||||||
if let Err(err) = udp::start_udp_listener(l).await {
|
if let Err(err) = udp::start_udp_listener(l).await {
|
||||||
println!("udp listener error: {}", err);
|
error!("udp listener error: {}", err);
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
});
|
});
|
||||||
@ -151,13 +168,22 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
|
|||||||
|
|
||||||
for del_key in to_delete {
|
for del_key in to_delete {
|
||||||
if let Some(listener) = listeners.get(&del_key) {
|
if let Some(listener) = listeners.get(&del_key) {
|
||||||
let _ = listener.notify_shutdown.send(()); //Errors are irrelevant here. I guess....
|
let res = listener.notify_shutdown.send(()); //Errors are irrelevant here. I guess....
|
||||||
println!("Removing listener!");
|
match res {
|
||||||
|
Ok(_) => {
|
||||||
|
info!("Sent shutdown signal!");
|
||||||
|
}
|
||||||
|
Err(_) => {
|
||||||
|
warn!("Failed to send shutdown signal!");
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
debug!("Removing listener!");
|
||||||
listeners.remove(&del_key);
|
listeners.remove(&del_key);
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
sighup_stream.recv().await;
|
sighup_stream.recv().await;
|
||||||
println!("Recevied SIGHUP!");
|
info!("Recevied SIGHUP, reloading config!");
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|||||||
@ -1,56 +1,60 @@
|
|||||||
use tokio::sync::broadcast;
|
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 {
|
pub(crate) struct Shutdown {
|
||||||
/// `true` if the shutdown signal has been received
|
|
||||||
shutdown: bool,
|
shutdown: bool,
|
||||||
|
|
||||||
/// The receive half of the channel used to listen for shutdown.
|
|
||||||
notify: broadcast::Receiver<()>,
|
notify: broadcast::Receiver<()>,
|
||||||
|
sender: broadcast::Sender<()>,
|
||||||
}
|
}
|
||||||
|
|
||||||
impl Shutdown {
|
impl Shutdown {
|
||||||
/// Create a new `Shutdown` backed by the given `broadcast::Receiver`.
|
pub(crate) fn new() -> Shutdown {
|
||||||
pub(crate) fn new(notify: broadcast::Receiver<()>) -> Shutdown {
|
let (sender, notify) = broadcast::channel(1);
|
||||||
Shutdown {
|
Shutdown {
|
||||||
shutdown: false,
|
shutdown: false,
|
||||||
notify,
|
notify,
|
||||||
|
sender,
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
pub(crate) fn shutdown(&mut self) {
|
||||||
|
if self.shutdown {
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
let _ = self.sender.send(());
|
||||||
|
self.shutdown = true;
|
||||||
|
}
|
||||||
|
|
||||||
|
pub(crate) fn receiver(&self) -> ShutdownReceiver {
|
||||||
|
ShutdownReceiver::new(self.notify.resubscribe())
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
#[derive(Debug)]
|
||||||
|
pub(crate) struct ShutdownReceiver {
|
||||||
|
shutdown: bool,
|
||||||
|
notify: broadcast::Receiver<()>,
|
||||||
|
}
|
||||||
|
|
||||||
|
impl ShutdownReceiver {
|
||||||
|
pub(crate) fn new(notify: broadcast::Receiver<()>) -> ShutdownReceiver {
|
||||||
|
ShutdownReceiver {
|
||||||
|
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) {
|
pub(crate) async fn recv(&mut self) {
|
||||||
// If the shutdown signal has already been received, then return
|
|
||||||
// immediately.
|
|
||||||
if self.shutdown {
|
if self.shutdown {
|
||||||
return;
|
return;
|
||||||
}
|
}
|
||||||
|
|
||||||
// Cannot receive a "lag error" as only one value is ever sent.
|
|
||||||
let _ = self.notify.recv().await;
|
let _ = self.notify.recv().await;
|
||||||
|
|
||||||
// Remember that the signal has been received.
|
|
||||||
self.shutdown = true;
|
self.shutdown = true;
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
impl Clone for Shutdown {
|
impl Clone for ShutdownReceiver {
|
||||||
fn clone(&self) -> Self {
|
fn clone(&self) -> Self {
|
||||||
Shutdown {
|
ShutdownReceiver {
|
||||||
shutdown: self.shutdown,
|
shutdown: self.shutdown,
|
||||||
notify: self.notify.resubscribe(),
|
notify: self.notify.resubscribe(),
|
||||||
}
|
}
|
||||||
|
|||||||
@ -1,4 +1,5 @@
|
|||||||
use crate::listener::Listener;
|
use crate::listener::Listener;
|
||||||
|
use log::{info, trace, warn};
|
||||||
use rand::seq::SliceRandom;
|
use rand::seq::SliceRandom;
|
||||||
use std::error::Error;
|
use std::error::Error;
|
||||||
use tokio::net::{TcpListener, TcpStream};
|
use tokio::net::{TcpListener, TcpStream};
|
||||||
@ -22,14 +23,14 @@ impl TcpHandler {
|
|||||||
pub(crate) async fn start_tcp_listener(
|
pub(crate) async fn start_tcp_listener(
|
||||||
mut listener_config: Listener,
|
mut listener_config: Listener,
|
||||||
) -> Result<(), Box<dyn Error>> {
|
) -> Result<(), Box<dyn Error>> {
|
||||||
println!("start listening on {}", &listener_config.source);
|
info!("start listening on {}", &listener_config.source);
|
||||||
let listener = TcpListener::bind(&listener_config.source).await?;
|
let listener = TcpListener::bind(&listener_config.source).await?;
|
||||||
|
|
||||||
loop {
|
loop {
|
||||||
let (next_socket, _) = tokio::select! {
|
let (next_socket, _) = tokio::select! {
|
||||||
res = listener.accept() => res?,
|
res = listener.accept() => res?,
|
||||||
_ = listener_config.shutdown.recv() => {
|
_ = listener_config.shutdown.recv() => {
|
||||||
println!("Exiting listener!");
|
info!("Exiting listener!");
|
||||||
return Ok(());
|
return Ok(());
|
||||||
}
|
}
|
||||||
};
|
};
|
||||||
@ -38,7 +39,7 @@ pub(crate) async fn start_tcp_listener(
|
|||||||
let mut rng = rand::thread_rng();
|
let mut rng = rand::thread_rng();
|
||||||
let selected_target = targets.choose(&mut rng).unwrap();
|
let selected_target = targets.choose(&mut rng).unwrap();
|
||||||
|
|
||||||
println!(
|
trace!(
|
||||||
"new connection from {} forwarding to {}",
|
"new connection from {} forwarding to {}",
|
||||||
next_socket.peer_addr()?,
|
next_socket.peer_addr()?,
|
||||||
&selected_target
|
&selected_target
|
||||||
@ -51,7 +52,7 @@ pub(crate) async fn start_tcp_listener(
|
|||||||
tokio::spawn(async move {
|
tokio::spawn(async move {
|
||||||
// Process the connection. If an error is encountered, log it.
|
// Process the connection. If an error is encountered, log it.
|
||||||
if let Err(err) = handler.run().await {
|
if let Err(err) = handler.run().await {
|
||||||
println!("connection error {}", err);
|
warn!("connection error {}", err);
|
||||||
}
|
}
|
||||||
});
|
});
|
||||||
}
|
}
|
||||||
|
|||||||
309
src/udp.rs
309
src/udp.rs
@ -1,176 +1,225 @@
|
|||||||
use crate::listener::Listener;
|
|
||||||
use crate::shutdown::Shutdown;
|
|
||||||
use rand::seq::SliceRandom;
|
|
||||||
use std::collections::HashMap;
|
use std::collections::HashMap;
|
||||||
use std::error::Error;
|
use std::sync::atomic::{AtomicI32, AtomicU64};
|
||||||
use std::sync::Arc;
|
use std::sync::Arc;
|
||||||
|
|
||||||
|
use log::{debug, error, info, trace};
|
||||||
|
use rand::seq::SliceRandom;
|
||||||
|
|
||||||
use tokio::net::UdpSocket;
|
use tokio::net::UdpSocket;
|
||||||
use tokio::sync::broadcast;
|
|
||||||
use tokio::sync::mpsc::{channel, Sender};
|
|
||||||
use tokio::sync::Mutex;
|
use tokio::sync::Mutex;
|
||||||
use tokio::time::Instant;
|
use tokio::time::Instant;
|
||||||
|
|
||||||
async fn create_dual_udpsocket(
|
use crate::listener::Listener;
|
||||||
bind_addr: &String,
|
use crate::shutdown::{Shutdown, ShutdownReceiver};
|
||||||
) -> Result<(UdpSocket, UdpSocket), Box<dyn Error>> {
|
use crate::Result;
|
||||||
let listener_std = std::net::UdpSocket::bind(bind_addr)?;
|
|
||||||
let responder_std = listener_std.try_clone()?;
|
|
||||||
let listener = UdpSocket::from_std(listener_std)?;
|
|
||||||
let responder = UdpSocket::from_std(responder_std)?;
|
|
||||||
|
|
||||||
return Ok((listener, responder));
|
const CONNECTION_TIMEOUT: i32 = 5;
|
||||||
|
|
||||||
|
#[derive(Clone)]
|
||||||
|
struct UDPMultiSender {
|
||||||
|
socket: Arc<UdpSocket>,
|
||||||
}
|
}
|
||||||
|
|
||||||
fn get_udp_background_send(socket: UdpSocket, mut exit: Shutdown) -> Sender<(Vec<u8>, String)> {
|
impl UDPMultiSender {
|
||||||
let (tx, mut rx) = channel::<(Vec<u8>, String)>(1);
|
fn new(socket: UdpSocket) -> Self {
|
||||||
|
return Self {
|
||||||
tokio::spawn(async move {
|
socket: Arc::new(socket),
|
||||||
loop {
|
|
||||||
let (buf, dest) = (tokio::select! {
|
|
||||||
res = rx.recv() => Some(res.unwrap()),
|
|
||||||
_ = exit.recv() => {
|
|
||||||
println!("Exiting listener!");
|
|
||||||
return;
|
|
||||||
}
|
|
||||||
})
|
|
||||||
.unwrap();
|
|
||||||
|
|
||||||
let to_send = buf.as_slice();
|
|
||||||
socket.send_to(to_send, &dest).await.expect(&format!(
|
|
||||||
"Failed to forward response from upstream server to client {}",
|
|
||||||
dest
|
|
||||||
));
|
|
||||||
}
|
|
||||||
});
|
|
||||||
|
|
||||||
return tx;
|
|
||||||
}
|
|
||||||
|
|
||||||
struct UdpHandler {
|
|
||||||
last_packet: Arc<Mutex<Instant>>,
|
|
||||||
kill: broadcast::Sender<()>,
|
|
||||||
target: String,
|
|
||||||
sender: Sender<(Vec<u8>, String)>,
|
|
||||||
}
|
|
||||||
|
|
||||||
impl UdpHandler {
|
|
||||||
async fn start(
|
|
||||||
target: String,
|
|
||||||
source: String,
|
|
||||||
sender: Sender<(Vec<u8>, String)>,
|
|
||||||
) -> Result<UdpHandler, Box<dyn Error>> {
|
|
||||||
// Kill Channel
|
|
||||||
let (tx, mut rx) = broadcast::channel::<()>(1);
|
|
||||||
|
|
||||||
let (listener, responder) = create_dual_udpsocket(&"0.0.0.0:0".to_owned()).await?;
|
|
||||||
|
|
||||||
let s = get_udp_background_send(responder, Shutdown::new(tx.subscribe()));
|
|
||||||
|
|
||||||
let last_packet = Arc::new(Mutex::new(Instant::now()));
|
|
||||||
|
|
||||||
let handler = UdpHandler {
|
|
||||||
kill: tx,
|
|
||||||
last_packet: last_packet.clone(),
|
|
||||||
// source: source.clone(),
|
|
||||||
target: target.clone(),
|
|
||||||
sender: s,
|
|
||||||
};
|
};
|
||||||
|
|
||||||
listener.connect(target).await?;
|
|
||||||
tokio::spawn(async move {
|
|
||||||
let mut buf = [0; 64 * 1024];
|
|
||||||
loop {
|
|
||||||
let (num_bytes, _) = tokio::select! {
|
|
||||||
res = listener.recv_from(&mut buf) => res.unwrap(),
|
|
||||||
_ = rx.recv() => {
|
|
||||||
// FIXME: Source of memory leaks?
|
|
||||||
return ;
|
|
||||||
}
|
|
||||||
};
|
|
||||||
let mut n = last_packet.lock().await;
|
|
||||||
*n = Instant::now();
|
|
||||||
sender
|
|
||||||
.send((buf[0..num_bytes].to_vec(), source.clone()))
|
|
||||||
.await
|
|
||||||
.expect(&format!("Failed to send answer to sender {}", source));
|
|
||||||
}
|
|
||||||
});
|
|
||||||
return Ok(handler);
|
|
||||||
}
|
}
|
||||||
|
|
||||||
async fn exit(&self) -> Result<(), Box<dyn Error>> {
|
async fn send(&self, buf: &[u8]) -> Result<()> {
|
||||||
self.kill.send(())?;
|
self.socket.send(buf).await?;
|
||||||
|
return Ok(());
|
||||||
Ok(())
|
|
||||||
}
|
}
|
||||||
|
|
||||||
async fn on_packet(&mut self, pkg: Vec<u8>) -> Result<(), Box<dyn Error>> {
|
async fn send_to(&self, buf: &[u8], dest: &str) -> Result<()> {
|
||||||
let mut n = self.last_packet.lock().await;
|
self.socket.send_to(buf, dest).await?;
|
||||||
*n = Instant::now();
|
|
||||||
self.sender.send((pkg, self.target.clone())).await?;
|
|
||||||
return Ok(());
|
return Ok(());
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
pub(crate) async fn start_udp_listener(
|
async fn splitted_udp_socket(bind_addr: &str) -> Result<(UdpSocket, UDPMultiSender)> {
|
||||||
mut listener_config: Listener,
|
let listener_std = std::net::UdpSocket::bind(bind_addr)?;
|
||||||
) -> Result<(), Box<dyn Error>> {
|
let responder_std = listener_std.try_clone()?;
|
||||||
println!("start listening on {}", &listener_config.source);
|
listener_std.set_nonblocking(true)?;
|
||||||
let (listener, responder) =
|
responder_std.set_nonblocking(true)?;
|
||||||
create_dual_udpsocket(&listener_config.source)
|
let listener = UdpSocket::from_std(listener_std)?;
|
||||||
.await
|
let responder = UDPMultiSender::new(UdpSocket::from_std(responder_std)?);
|
||||||
.expect(&format!(
|
|
||||||
"Failed to clone primary listening address socket {}",
|
|
||||||
&listener_config.source,
|
|
||||||
));
|
|
||||||
|
|
||||||
let sender = get_udp_background_send(responder, listener_config.shutdown.clone());
|
return Ok((listener, responder));
|
||||||
|
}
|
||||||
|
|
||||||
let mut connections: HashMap<String, UdpHandler> = HashMap::new();
|
struct UDPChannel {
|
||||||
|
last_packet: Arc<AtomicI32>,
|
||||||
|
sender: UDPMultiSender,
|
||||||
|
shutdown: Shutdown,
|
||||||
|
from: String,
|
||||||
|
upstream: String,
|
||||||
|
}
|
||||||
|
|
||||||
|
impl UDPChannel {
|
||||||
|
async fn start(
|
||||||
|
upstream: String,
|
||||||
|
responder: UDPMultiSender,
|
||||||
|
source_addr: String,
|
||||||
|
) -> Result<Self> {
|
||||||
|
let (upstream_listener, upstream_responder) = splitted_udp_socket("0.0.0.0:0").await?;
|
||||||
|
upstream_listener.connect(upstream.clone()).await?;
|
||||||
|
|
||||||
|
let shutdown = Shutdown::new();
|
||||||
|
let mut shutdown_receiver = shutdown.receiver();
|
||||||
|
|
||||||
|
let channel = Self {
|
||||||
|
last_packet: Arc::new(AtomicI32::new(CONNECTION_TIMEOUT)),
|
||||||
|
sender: upstream_responder,
|
||||||
|
shutdown,
|
||||||
|
from: source_addr.clone(),
|
||||||
|
upstream: upstream.clone(),
|
||||||
|
};
|
||||||
|
|
||||||
|
let last_packet = channel.last_packet.clone();
|
||||||
|
|
||||||
|
tokio::spawn(async move {
|
||||||
let mut buf = [0; 64 * 1024];
|
let mut buf = [0; 64 * 1024];
|
||||||
loop {
|
loop {
|
||||||
|
let num_bytes = tokio::select! {
|
||||||
|
res = upstream_listener.recv(&mut buf) => res.unwrap(),
|
||||||
|
_ = shutdown_receiver.recv() => {
|
||||||
|
info!("Exiting");
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
};
|
||||||
|
|
||||||
|
trace!("[{}] <- [{}] ...", source_addr, upstream);
|
||||||
|
last_packet.store(CONNECTION_TIMEOUT, std::sync::atomic::Ordering::Relaxed);
|
||||||
|
|
||||||
|
match responder.send_to(&buf[..num_bytes], &source_addr).await {
|
||||||
|
Ok(_) => {}
|
||||||
|
Err(e) => {
|
||||||
|
error!("Failed to send packet: {}", e);
|
||||||
|
}
|
||||||
|
};
|
||||||
|
|
||||||
|
trace!("[{}] <- [{}] ---", source_addr, upstream);
|
||||||
|
}
|
||||||
|
});
|
||||||
|
|
||||||
|
return Ok(channel);
|
||||||
|
}
|
||||||
|
|
||||||
|
async fn close(&mut self) {
|
||||||
|
self.shutdown.shutdown();
|
||||||
|
debug!("Closing connection from {}", self.from);
|
||||||
|
}
|
||||||
|
|
||||||
|
async fn handle(&self, data: &[u8]) {
|
||||||
|
trace!("[{}] -> [{}] ...", self.from, self.upstream);
|
||||||
|
self.last_packet
|
||||||
|
.store(CONNECTION_TIMEOUT, std::sync::atomic::Ordering::Relaxed);
|
||||||
|
match self.sender.send(data).await {
|
||||||
|
Ok(_) => {}
|
||||||
|
Err(e) => {
|
||||||
|
error!("Failed to send packet: {}", e);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
trace!("[{}] -> [{}] ---", self.from, self.upstream);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
fn start_stale_check(
|
||||||
|
connections: Arc<Mutex<HashMap<String, UDPChannel>>>,
|
||||||
|
mut shutdown: ShutdownReceiver,
|
||||||
|
) {
|
||||||
|
tokio::spawn(async move {
|
||||||
|
let mut interval = tokio::time::interval(std::time::Duration::from_secs(1));
|
||||||
|
loop {
|
||||||
|
tokio::select! {
|
||||||
|
_ = interval.tick() => {}
|
||||||
|
_ = shutdown.recv() => {
|
||||||
|
info!("Exiting listener!");
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
trace!("Checking for stale connections");
|
||||||
|
trace!("Waiting for connections lock");
|
||||||
|
let mut connections = connections.lock().await;
|
||||||
|
trace!("Got connections lock");
|
||||||
|
let mut to_remove: Vec<String> = Vec::new();
|
||||||
|
for (source_addr, channel) in connections.iter() {
|
||||||
|
let last = channel
|
||||||
|
.last_packet
|
||||||
|
.fetch_sub(1, std::sync::atomic::Ordering::Relaxed);
|
||||||
|
|
||||||
|
if last <= 0 {
|
||||||
|
to_remove.push(source_addr.clone());
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
for source_addr in to_remove {
|
||||||
|
debug!("Closing connection from {}", source_addr);
|
||||||
|
let mut channel = connections.remove(&source_addr).unwrap();
|
||||||
|
channel.close().await;
|
||||||
|
}
|
||||||
|
trace!("Checking for stale connections - done");
|
||||||
|
drop(connections);
|
||||||
|
}
|
||||||
|
|
||||||
|
info!("Exiting stale check");
|
||||||
|
});
|
||||||
|
}
|
||||||
|
|
||||||
|
pub(crate) async fn start_udp_listener(mut listener_config: Listener) -> Result<()> {
|
||||||
|
info!("start listening on {}", &listener_config.source);
|
||||||
|
let (listener, responder) = splitted_udp_socket(&listener_config.source).await?;
|
||||||
|
let connections = Arc::new(Mutex::new(HashMap::<String, UDPChannel>::new()));
|
||||||
|
|
||||||
|
start_stale_check(connections.clone(), listener_config.shutdown.clone());
|
||||||
|
|
||||||
|
loop {
|
||||||
|
let mut buf = vec![0; 1024 * 64];
|
||||||
|
trace!("Waiting for packet or shutdown");
|
||||||
let (num_bytes, src_addr) = tokio::select! {
|
let (num_bytes, src_addr) = tokio::select! {
|
||||||
res = listener.recv_from(&mut buf) => res?,
|
res = listener.recv_from(&mut buf) => res?,
|
||||||
_ = listener_config.shutdown.recv() => {
|
_ = listener_config.shutdown.recv() => {
|
||||||
println!("Exiting listener!");
|
info!("Exiting listener!");
|
||||||
break;
|
break;
|
||||||
}
|
}
|
||||||
};
|
};
|
||||||
|
|
||||||
let addr = src_addr.to_string();
|
let data = buf[0..num_bytes].to_vec();
|
||||||
let handler_opt = connections.get_mut(&addr);
|
let source_addr = src_addr.to_string();
|
||||||
let vec = buf[0..num_bytes].to_vec();
|
|
||||||
|
let mut connections = connections.lock().await;
|
||||||
|
|
||||||
|
let handler_opt = connections.get_mut(&source_addr);
|
||||||
let handler = match handler_opt {
|
let handler = match handler_opt {
|
||||||
Some(handler) => handler,
|
Some(handler) => handler,
|
||||||
None => {
|
None => {
|
||||||
|
debug!("New connection from {}", source_addr);
|
||||||
let targets = listener_config.targets.read().await;
|
let targets = listener_config.targets.read().await;
|
||||||
let selected_target = {
|
let upstream = {
|
||||||
let mut rng = rand::thread_rng();
|
let mut rng = rand::thread_rng();
|
||||||
targets.choose(&mut rng).unwrap()
|
targets.choose(&mut rng).unwrap()
|
||||||
};
|
};
|
||||||
|
|
||||||
let handler =
|
let handler =
|
||||||
UdpHandler::start(selected_target.clone(), addr.clone(), sender.clone())
|
UDPChannel::start(upstream.to_string(), responder.clone(), source_addr.clone())
|
||||||
.await?;
|
.await?;
|
||||||
connections.insert(addr.clone(), handler);
|
|
||||||
|
|
||||||
connections.get_mut(&addr).unwrap()
|
connections.insert(source_addr.clone(), handler);
|
||||||
|
connections.get_mut(&source_addr).unwrap()
|
||||||
}
|
}
|
||||||
};
|
};
|
||||||
|
|
||||||
match handler.on_packet(vec).await {
|
handler.handle(&data).await;
|
||||||
Ok(_) => (),
|
trace!("Handled packet");
|
||||||
Err(err) => {
|
drop(connections);
|
||||||
println!("Failed to forward request from client to server {}", err);
|
}
|
||||||
|
|
||||||
|
for (_, handler) in connections.lock().await.iter_mut() {
|
||||||
|
handler.close().await;
|
||||||
|
}
|
||||||
|
|
||||||
return Ok(());
|
return Ok(());
|
||||||
}
|
}
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
for handler in connections.values() {
|
|
||||||
handler.exit().await?;
|
|
||||||
}
|
|
||||||
|
|
||||||
Ok(())
|
|
||||||
}
|
|
||||||
|
|||||||
Loading…
Reference in New Issue
Block a user