From 93b7ebffaa653ec3684743f8c8bd01f667c9cdae Mon Sep 17 00:00:00 2001
From: rdb <git@rdb.name>
Date: Tue, 15 Feb 2022 17:31:34 +0100
Subject: [PATCH] pstats: PStatClient.connect() should wait for UDP connection
 to be established

This makes the behavior of PStats more predictable, reducing missed frames at the beginning
---
 panda/src/pstatclient/pStatClientImpl.cxx | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/panda/src/pstatclient/pStatClientImpl.cxx b/panda/src/pstatclient/pStatClientImpl.cxx
index 02f1764b81..85d7e45f27 100644
--- a/panda/src/pstatclient/pStatClientImpl.cxx
+++ b/panda/src/pstatclient/pStatClientImpl.cxx
@@ -124,6 +124,11 @@ client_connect(std::string hostname, int port) {
   MutexDebug::increment_pstats();
 #endif // DEBUG_THREADS
 
+  // Wait for the server hello.
+  while (!_got_udp_port) {
+    transmit_control_data();
+  }
+
   return _is_connected;
 }