Adding config file locations and yaml support

Cargo.lock

@@ -2,6 +2,12 @@
 # It is not intended for manual editing.
 version = 3
 
+[[package]]
+name = "autocfg"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
+
 [[package]]
 name = "bitflags"
 version = "1.3.2"
@@ -109,6 +115,12 @@ dependencies = [
  "slab",
 ]
 
+[[package]]
+name = "hashbrown"
+version = "0.11.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ab5ef0d4909ef3724cc8cce6ccc8572c5c817592e9285f5464f8e86f8bd3726e"
+
 [[package]]
 name = "hermit-abi"
 version = "0.1.19"
@@ -118,6 +130,16 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "indexmap"
+version = "1.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "282a6247722caba404c065016bbfa522806e51714c34f5dfc3e4a3a46fcb4223"
+dependencies = [
+ "autocfg",
+ "hashbrown",
+]
+
 [[package]]
 name = "itoa"
 version = "1.0.1"
@@ -130,6 +152,12 @@ version = "0.2.121"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "efaa7b300f3b5fe8eb6bf21ce3895e1751d9665086af2d64b42f19701015ff4f"
 
+[[package]]
+name = "linked-hash-map"
+version = "0.5.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7fb9b38af92608140b86b693604b9ffcc5824240a484d1ecd4795bacb2fe88f3"
+
 [[package]]
 name = "lock_api"
 version = "0.4.6"
@@ -266,11 +294,13 @@ dependencies = [
 
 [[package]]
 name = "rustocat"
-version = "0.0.2"
+version = "0.0.3"
 dependencies = [
  "futures",
  "serde",
  "serde_json",
+ "serde_yaml",
+ "simple-error",
  "tokio",
 ]
 
@@ -317,6 +347,18 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "serde_yaml"
+version = "0.8.23"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a4a521f2940385c165a24ee286aa8599633d162077a54bdcae2a6fd5a7bfa7a0"
+dependencies = [
+ "indexmap",
+ "ryu",
+ "serde",
+ "yaml-rust",
+]
+
 [[package]]
 name = "signal-hook-registry"
 version = "1.4.0"
@@ -326,6 +368,12 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "simple-error"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cc47a29ce97772ca5c927f75bac34866b16d64e07f330c3248e2d7226623901b"
+
 [[package]]
 name = "slab"
 version = "0.4.5"
@@ -466,3 +514,12 @@ name = "windows_x86_64_msvc"
 version = "0.32.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "504a2476202769977a040c6364301a3f65d0cc9e3fb08600b2bda150a0488316"
+
+[[package]]
+name = "yaml-rust"
+version = "0.4.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "56c1936c4cc7a1c9ab21a1ebb602eb942ba868cbd44a99cb7cdc5892335e1c85"
+dependencies = [
+ "linked-hash-map",
+]

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "rustocat"
-version = "0.0.2"
+version = "0.0.3"
 edition = "2021"
 description = "Socat in rust with many less features and a configuration file"
 license = "ISC"
@@ -12,7 +12,8 @@ tokio = { version = "1.17.0", features = ["full"] }
 futures = "0.3.21"
 serde = { version = "1.0.136", features = ["derive"] }
 serde_json = "1.0.79"
-
+serde_yaml = "0.8.23"
+simple-error = "0.2.3"
 
 [profile.release]
 opt-level = 'z'     # Optimize for size.

README.md

@@ -0,0 +1,15 @@
+# Rustocat
+
+Rustocat is a simple socat alternative with way less features, but it has a config file.
+
+## Config File
+
+Configs can be either yaml or json and can be located in /etc/rustocat.{yaml|json} or ind the current working directory as config.{yaml|json}.
+
+```yaml
+tcp:
+  - source: 0.0.0.0:2222
+    target: 127.0.0.1:22
+```
+
+Currently only TCP is supported, UDP/Unix Socket support might be added later.

src/main.rs

@@ -3,6 +3,8 @@ mod shutdown;
 mod tcp;
 
 use serde::Deserialize;
+use simple_error::bail;
+use std::error::Error;
 use std::fs::File;
 use std::path::Path;
 use tokio::sync::broadcast;
@@ -19,14 +21,48 @@ struct Config {
     // udp: Vec<Target>,
 }
 
+fn load_yaml(path: &Path) -> Result<Config, Box<dyn Error>> {
+    let file = File::open(path)?;
+    let config: Config = serde_yaml::from_reader(file).expect("Failed to parse!"); //TODO: Print path
+
+    return Ok(config);
+}
+
+fn load_json(path: &Path) -> Result<Config, Box<dyn Error>> {
+    let file = File::open(path)?;
+    let config: Config = serde_json::from_reader(file).expect("Failed to parse!"); //TODO: Print path
+
+    return Ok(config);
+}
+
+fn load_config() -> Result<Config, Box<dyn Error>> {
+    for path in [
+        "config.yaml",
+        "config.json",
+        "/etc/rustocat.yaml",
+        "/etc/rustocat.json",
+    ]
+    .iter()
+    {
+        // if(p)
+        let config = if path.ends_with(".yaml") {
+            load_yaml(Path::new(path))
+        } else {
+            load_json(Path::new(path))
+        };
+        if config.is_ok() {
+            return config;
+        }
+    }
+    bail!("No config file found");
+}
+
 #[tokio::main]
 async fn main() {
-    let json_file_path = Path::new("./config.json");
+    let config = load_config().expect("config not found");
-    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()),

src/shutdown.rs

@@ -28,9 +28,9 @@ impl Shutdown {
    }
 
    /// Returns `true` if the shutdown signal has been received.
-   pub(crate) fn is_shutdown(&self) -> bool {
+   // pub(crate) fn is_shutdown(&self) -> bool {
-      self.shutdown
+   //    self.shutdown
-   }
+   // }
 
    /// Receive the shutdown notice, waiting if necessary.
    pub(crate) async fn recv(&mut self) {