From 642ba322c40f6b67bdec401b8465b53ed1ea980c Mon Sep 17 00:00:00 2001
From: staphen <staphen@gmail.com>
Date: Mon, 17 Nov 2025 21:12:46 -0500
Subject: [PATCH] Send echo request to update latency statistics every 5
 seconds

---
 Source/dvlnet/base.cpp | 6 ++++++
 Source/dvlnet/base.h   | 1 +
 2 files changed, 7 insertions(+)

diff --git a/Source/dvlnet/base.cpp b/Source/dvlnet/base.cpp
index 9ecadbce9..3ebe2120e 100644
--- a/Source/dvlnet/base.cpp
+++ b/Source/dvlnet/base.cpp
@@ -226,6 +226,12 @@ tl::expected<void, PacketError> base::RecvLocal(packet &pkt)
 
 bool base::SNetReceiveMessage(uint8_t *sender, void **data, size_t *size)
 {
+	uint32_t now = SDL_GetTicks();
+	if (now == 0) now++;
+	if (lastEchoTime == 0 || now - lastEchoTime > 5000) {
+		for (plr_t i = 0; i < Players.size(); i++)
+			SendEchoRequest(i);
+	}
 	poll();
 	if (message_queue.empty())
 		return false;
diff --git a/Source/dvlnet/base.h b/Source/dvlnet/base.h
index 4144f3440..8c9ce96bb 100644
--- a/Source/dvlnet/base.h
+++ b/Source/dvlnet/base.h
@@ -90,6 +90,7 @@ protected:
 private:
 	std::array<PlayerState, MAX_PLRS> playerStateTable_;
 	bool awaitingSequenceNumber_ = true;
+	uint32_t lastEchoTime = 0;
 
 	plr_t GetOwner();
 	bool AllTurnsArrived();