From 8755cca66f5a6743984dfd78b58f8c042103b6f7 Mon Sep 17 00:00:00 2001
From: neon <>
Date: Fri, 27 Sep 2019 02:03:50 +0200
Subject: [PATCH] Knife Madness: add cvar restrictions

---
 .../scripting/UNLOZE_KnifeMadness.sp          | 75 +++++++++++++++++++
 1 file changed, 75 insertions(+)

diff --git a/UNLOZE_KnifeMadness/scripting/UNLOZE_KnifeMadness.sp b/UNLOZE_KnifeMadness/scripting/UNLOZE_KnifeMadness.sp
index e35cedd8..5053285f 100644
--- a/UNLOZE_KnifeMadness/scripting/UNLOZE_KnifeMadness.sp
+++ b/UNLOZE_KnifeMadness/scripting/UNLOZE_KnifeMadness.sp
@@ -46,6 +46,9 @@ public void OnClientSpawn(Event hEvent, const char[] sEvent, bool bDontBroadcast
 
 	g_bClientKnifed[client] = false;
 	g_bSupressDeath[client] = false;
+
+	if (!IsFakeClient(client))
+		QueryClient(client);
 }
 
 //----------------------------------------------------------------------------------------------------
@@ -150,6 +153,78 @@ public Action KillZM(Handle timer, DataPack pack)
 	hEvent.Fire();
 }
 
+//----------------------------------------------------------------------------------------------------
+// Purpose:
+//----------------------------------------------------------------------------------------------------
+public void QueryClient(int client)
+{
+	if (QueryClientConVar(client, "cl_updaterate", OnConVarQueryFinished, GetClientSerial(client)) == QUERYCOOKIE_FAILED)
+		LogError("Could not query ConVar \"cl_updaterate\" for %N", client);
+
+	if (QueryClientConVar(client, "cl_cmdrate", OnConVarQueryFinished, GetClientSerial(client)) == QUERYCOOKIE_FAILED)
+		LogError("Could not query ConVar \"cl_cmdrate\" for %N", client);
+
+	if (QueryClientConVar(client, "cl_lagcompensation", OnConVarQueryFinished, GetClientSerial(client)) == QUERYCOOKIE_FAILED)
+		LogError("Could not query ConVar \"cl_lagcompensation\" for %N", client);
+}
+
+//----------------------------------------------------------------------------------------------------
+// Purpose:
+//----------------------------------------------------------------------------------------------------
+public void OnConVarQueryFinished(QueryCookie cookie, int client, ConVarQueryResult result, const char[] cvarName, const char[] cvarValue, int iSerial)
+{
+	if (GetClientFromSerial(iSerial) != client)
+		return;
+
+	if (result == ConVarQuery_NotFound)
+	{
+		LogError("Could not find ConVar \"cvarName\" for %N", client);
+		return;
+	}
+
+	if (result == ConVarQuery_Okay)
+    {
+		float fValue = StringToFloat(cvarValue);
+
+		if (StrEqual(cvarName, "cl_updaterate", false))
+		{
+			if (!(20.0 <= fValue <= 130.0))
+			{
+				LogAction(client, -1, "\"%L\" ConVar Violation: cl_updaterate (Value: %f)", client, fValue);
+				KickClient(client, "ConVar Violation: cl_updaterate must be set between 20 and 130");
+				return;
+			}
+		}
+		else if (StrEqual(cvarName, "cl_cmdrate", false))
+		{
+			if (!(20.0 <= fValue <= 130.0))
+			{
+				LogAction(client, -1, "\"%L\" ConVar Violation: cl_cmdrate (Value: %f)", client, fValue);
+				KickClient(client, "ConVar Violation: cl_cmdrate must be set between 20 and 130");
+				return;
+			}
+		}
+		else if (StrEqual(cvarName, "cl_lagcompensation", false))
+		{
+			if (!fValue)
+			{
+				LogAction(client, -1, "\"%L\" ConVar Violation: cl_lagcompensation (Value: %f)", client, fValue);
+				KickClient(client, "ConVar Violation: cl_lagcompensation must be set to 1");
+				return;
+			}
+		}
+		else if (StrEqual(cvarName, "cl_interp", false))
+		{
+			if ((!(fValue >= 0.1)) && (fValue != 0.0))
+			{
+				LogAction(client, -1, "\"%L\" ConVar Violation: cl_interp (Value: %f)", client, fValue);
+				KickClient(client, "ConVar Violation: cl_interp must not be lower than 0.1");
+				return;
+			}
+		}
+	}
+}
+
 //----------------------------------------------------------------------------------------------------
 // Purpose:
 //----------------------------------------------------------------------------------------------------