Improve DASP trace: use S/R labels, add timestamp and full hex datagram

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

dasp.py

@@ -85,16 +85,20 @@ _MSG_TYPE_NAMES = {
 }
 
 
-def _trace(direction, msg, addr=None):
+def _trace(direction, msg, datagram=None):
     import app_state
     if not app_state.TRACE_DASP:
         return
+    import datetime
+    ts = datetime.datetime.now().strftime("%H:%M:%S.%f")[:-3]
     name = _MSG_TYPE_NAMES.get(msg.msg_type, f"?{msg.msg_type}")
     seq = f" seq={msg.seq_num}" if msg.seq_num >= 0 else ""
     ack = f" ack={msg.ack}" if msg.ack >= 0 else ""
     plen = len(msg.payload) if msg.payload else 0
-    dest = f" {addr[0]}:{addr[1]}" if addr else ""
-    print(f"[DASP] {direction}{dest} {name}{seq}{ack} payload={plen}")
+    hexdump = ""
+    if datagram:
+        hexdump = " [" + datagram.hex(" ") + "]"
+    print(f"[DASP] {ts} {direction} {name}{seq}{ack} payload={plen}{hexdump}")
 
 
 class DaspException(Exception):
@@ -916,8 +920,8 @@ class DaspSocket:
     # ── Network I/O ─────────────────────────────────────────────
 
     def _send_msg(self, session, msg):
-        _trace(">>>", msg, (session.host, session.port))
         data = msg.encode()
+        _trace("S", msg, data)
         with self._send_lock:
             try:
                 self._sock.sendto(data, (session.host, session.port))
@@ -931,8 +935,9 @@ class DaspSocket:
                 nbytes, addr = self._sock.recvfrom_into(buf)
                 if nbytes < 5:
                     continue
+                raw = bytes(buf[:nbytes])
                 msg = DaspMsg.decode(buf, nbytes)
-                self._dispatch(msg, addr)
+                self._dispatch(msg, addr, raw)
             except socket.timeout:
                 continue
             except OSError:
@@ -940,8 +945,8 @@ class DaspSocket:
                     continue
                 break
 
-    def _dispatch(self, msg, addr):
-        _trace("<<<", msg, addr)
+    def _dispatch(self, msg, addr, raw=None):
+        _trace("R", msg, raw)
         session_id = msg.session_id
         with self._sessions_lock:
             session = self._sessions.get(session_id)