feat(sim): add standalone trippy-sim cli tool (WIP)

Author: fujiapple852

Cargo.lock

@@ -17,6 +17,7 @@ trippy-core.workspace = true
 trippy-packet.workspace = true
 trippy-privilege.workspace = true
 anyhow.workspace = true
+clap.workspace = true
 ipnetwork.workspace = true
 serde = { workspace = true, default-features = false, features = ["derive"] }
 tokio = { workspace = true, features = ["full"] }

crates/trippy-sim/Cargo.toml

@@ -0,0 +1,31 @@
+#![cfg(any(target_os = "linux", target_os = "macos", target_os = "windows"))]
+
+use anyhow::Context;
+use clap::Parser;
+use tracing_subscriber::fmt::format::FmtSpan;
+use trippy_privilege::Privilege;
+use trippy_sim::{simulate, Simulation};
+
+/// Trace a route to a host and record statistics
+#[allow(clippy::doc_markdown)]
+#[derive(Parser, Debug)]
+#[command(name = "trip", author, version, about, long_about = None, arg_required_else_help(true))]
+pub struct Args {
+    /// A simulation file to run.
+    pub simulation: String,
+}
+
+pub async fn run() -> anyhow::Result<()> {
+    let args = Args::parse();
+    tracing_subscriber::fmt()
+        .with_span_events(FmtSpan::NONE)
+        .with_env_filter("debug")
+        .init();
+    if !Privilege::discover()?.has_privileges() {
+        return Err(anyhow::anyhow!("Privileges required to run this command"));
+    }
+    let simulation_file =
+        std::fs::read_to_string(&args.simulation).context(args.simulation.to_string())?;
+    let sim: Simulation = toml::from_str(&simulation_file)?;
+    simulate(sim).await
+}

crates/trippy-sim/src/app.rs

@@ -0,0 +1,8 @@
+mod app;
+
+#[tokio::main]
+async fn main() -> anyhow::Result<()> {
+    #[cfg(any(target_os = "linux", target_os = "macos", target_os = "windows"))]
+    app::run().await?;
+    Ok(())
+}