fix: read back sent copies after the sec 5.6 upstream fix, pinned at 2d65d66

native/src/bin/dnsprobe.rs

@@ -0,0 +1,17 @@
+// Device probe: reproduce the app's DNS failure in isolation. Resolves
+// the given host exactly the way fumi-core's connect does — Rust std's
+// getaddrinfo — and prints what came back.
+
+use std::net::ToSocketAddrs;
+
+fn main() {
+    let host = std::env::args().nth(1).unwrap_or_else(|| "example.com".into());
+    let target = format!("{host}:1961");
+    match target.to_socket_addrs() {
+        Ok(addrs) => {
+            let ips: Vec<String> = addrs.map(|a| a.to_string()).collect();
+            println!("resolved {host}: {ips:?}");
+        }
+        Err(err) => println!("FAILED {host}: {err}"),
+    }
+}