ffi: expose min_rtt and rttvar to FFI

quiche/include/quiche.h

@@ -660,6 +660,12 @@ typedef struct {
     // The estimated round-trip time of the path (in nanoseconds).
     uint64_t rtt;
 
+    // The minimum round-trip time observed (in nanoseconds).
+    uint64_t min_rtt;
+
+    // The estimated round-trip time variation (in nanoseconds).
+    uint64_t rttvar;
+
     // The size of the path's congestion window in bytes.
     size_t cwnd;
 

quiche/src/ffi.rs

@@ -1301,6 +1301,8 @@ pub struct PathStats {
     lost: usize,
     retrans: usize,
     rtt: u64,
+    min_rtt: u64,
+    rttvar: u64,
     cwnd: usize,
     sent_bytes: u64,
     recv_bytes: u64,
@@ -1328,6 +1330,8 @@ pub extern fn quiche_conn_path_stats(
     out.lost = stats.lost;
     out.retrans = stats.retrans;
     out.rtt = stats.rtt.as_nanos() as u64;
+    out.min_rtt = stats.min_rtt.unwrap_or_default().as_nanos() as u64;
+    out.rttvar = stats.rttvar.as_nanos() as u64;
     out.cwnd = stats.cwnd;
     out.sent_bytes = stats.sent_bytes;
     out.recv_bytes = stats.recv_bytes;