From 5690d792a540df4615aef7e32e2c7c3e70823e38 Mon Sep 17 00:00:00 2001
From: AskaEth <i@yeij.top>
Date: Sun, 26 Jul 2026 17:59:22 +0800
Subject: [PATCH] fix: use struct.pack_into for safe 324-byte test packet
 construction

---
 server/telemetry/listener.py | 39 +++++++++++++++++++-----------------
 1 file changed, 21 insertions(+), 18 deletions(-)

diff --git a/server/telemetry/listener.py b/server/telemetry/listener.py
index 3f48ac7..64e9044 100644
--- a/server/telemetry/listener.py
+++ b/server/telemetry/listener.py
@@ -187,24 +187,27 @@ class TelemetryListener:
             ws_manager.push_telemetry(td)
 
             if self.forwarder._sock and self.forwarder._targets:
-                buf = struct.pack("<iI" + "f" * 79 + "H" + "B" * 6 + "b" * 3,
-                    1, int(time.time() * 1000),
-                    max_rpm, 800.0, rpm,
-                    0.0, 0.0, 0.0, 0.0, 0.0, 0.0,
-                    0.0, 0.0, 0.0, 0.0, 0.0, 0.0,
-                    0.0, 0.0, 0.0, 0.0, 0.0, 0.0,
-                    0.0, 0.0, 0.0, 0.0, 0.0, 0.0,
-                    0.0, 0.0, 0.0, 0.0, 0.0, 0.0,
-                    0.0, 0.0, 0.0, 0.0, 0.0, 0.0,
-                    0.0, 0.0, 0.0, 0.0, 0.0, 0.0,
-                    0.0, 0.0, 0.0, speed_kmh / 3.6, 0.0, torque,
-                    0.0, 0.0, 0.0, 0.0, boost, fuel,
-                    0.0, 0.0, best_lap, last_lap, lap_time,
-                    0.0, 0.0, 0.0,
-                    int(phase) % 15,
-                    1, int(throttle * 255), int(brake * 255), 0, 0, gear,
-                    int(steering * 127), 0, 0)
-                self.forwarder.forward(buf)
+                buf = bytearray(324)
+                struct.pack_into("<i", buf, 0, 1)
+                struct.pack_into("<I", buf, 4, int(time.time() * 1000))
+                struct.pack_into("<f", buf, 8, max_rpm)
+                struct.pack_into("<f", buf, 12, 800.0)
+                struct.pack_into("<f", buf, 16, rpm)
+                struct.pack_into("<f", buf, 256, speed_kmh / 3.6)
+                struct.pack_into("<f", buf, 260, rpm / max_rpm * 400000)
+                struct.pack_into("<f", buf, 264, torque)
+                struct.pack_into("<f", buf, 284, boost)
+                struct.pack_into("<f", buf, 288, fuel)
+                struct.pack_into("<f", buf, 296, best_lap)
+                struct.pack_into("<f", buf, 300, last_lap)
+                struct.pack_into("<f", buf, 304, lap_time)
+                struct.pack_into("<H", buf, 312, int(phase) % 15)
+                struct.pack_into("<B", buf, 314, 1)
+                struct.pack_into("<B", buf, 315, int(throttle * 255))
+                struct.pack_into("<B", buf, 316, int(brake * 255))
+                struct.pack_into("<B", buf, 319, gear)
+                struct.pack_into("<b", buf, 320, int(steering * 127))
+                self.forwarder.forward(bytes(buf))
 
             for cb in self._callbacks:
                 try: cb(td)