feat: bootstrap awg2 harness rust workspace and docs

traffic_core/src/iface.rs

@@ -0,0 +1,41 @@
+use crate::{config::Config, docker::run_capture};
+
+pub fn detect_interface(cfg: &Config, container: &str) -> anyhow::Result<String> {
+    for ifname in &cfg.amnezia.interface_candidates {
+        let ok = std::process::Command::new("docker")
+            .args(["exec", container, "ip", "link", "show", ifname])
+            .output()?;
+        if ok.status.success() {
+            return Ok(ifname.clone());
+        }
+    }
+
+    let links = run_capture(&[
+        "docker",
+        "exec",
+        container,
+        "sh",
+        "-c",
+        "ip -o link show | awk -F': ' '{print $2}'",
+    ])?;
+
+    for raw in links.lines() {
+        let name = raw.trim();
+        for p in &cfg.amnezia.interface_patterns {
+            if glob_like_match(p, name) {
+                return Ok(name.to_string());
+            }
+        }
+    }
+
+    anyhow::bail!("unable to detect amnezia interface")
+}
+
+fn glob_like_match(pattern: &str, value: &str) -> bool {
+    if let Some(prefix) = pattern.strip_suffix('*') {
+        value.starts_with(prefix)
+    } else {
+        pattern == value
+    }
+}
+