1 files changed, 46 insertions, 0 deletions
diff --git a/third_party/rust/neqo-transport/src/connection/dump.rs b/third_party/rust/neqo-transport/src/connection/dump.rs
new file mode 100644
index 0000000000..77d51c605c
--- /dev/null
+++ b/third_party/rust/neqo-transport/src/connection/dump.rs
@@ -0,0 +1,46 @@
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// Enable just this file for logging to just see packets.
+// e.g. "RUST_LOG=neqo_transport::dump neqo-client ..."
+
+use std::fmt::Write;
+
+use neqo_common::{qdebug, Decoder};
+
+use crate::{
+    connection::Connection,
+    frame::Frame,
+    packet::{PacketNumber, PacketType},
+    path::PathRef,
+};
+
+#[allow(clippy::module_name_repetitions)]
+pub fn dump_packet(
+    conn: &Connection,
+    path: &PathRef,
+    dir: &str,
+    pt: PacketType,
+    pn: PacketNumber,
+    payload: &[u8],
+) {
+    if !log::log_enabled!(log::Level::Debug) {
+        return;
+    }
+
+    let mut s = String::from("");
+    let mut d = Decoder::from(payload);
+    while d.remaining() > 0 {
+        let Ok(f) = Frame::decode(&mut d) else {
+            s.push_str(" [broken]...");
+            break;
+        };
+        if let Some(x) = f.dump() {
+            write!(&mut s, "\n  {} {}", dir, &x).unwrap();
+        }
+    }
+    qdebug!([conn], "pn={} type={:?} {}{}", pn, pt, path.borrow(), s);
+}