From 8f8c00c66d3382907af6bc34f31261dfc83525fa Mon Sep 17 00:00:00 2001
From: Nicholas Hastings <nshastings@gmail.com>
Date: Sun, 13 Sep 2015 17:18:33 -0400
Subject: [PATCH] Update metamod-attached extensions to use same engine ptr
 lookup as core.

(On TF2-branch games, always search for engine v23 first, falling back to v22.)
---
 public/smsdk_ext.cpp | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/public/smsdk_ext.cpp b/public/smsdk_ext.cpp
index ecb73889..f88972b5 100644
--- a/public/smsdk_ext.cpp
+++ b/public/smsdk_ext.cpp
@@ -340,8 +340,25 @@ bool SDKExtension::Load(PluginId id, ISmmAPI *ismm, char *error, size_t maxlen,
 	GET_V_IFACE_CURRENT(engineFactory, engine, IVEngineServer, INTERFACEVERSION_VENGINESERVER);
 #else
 	GET_V_IFACE_ANY(GetServerFactory, gamedll, IServerGameDLL, INTERFACEVERSION_SERVERGAMEDLL);
+#if SOURCE_ENGINE == SE_TF2 || SOURCE_ENGINE == SE_CSS || SOURCE_ENGINE == SE_DODS || SOURCE_ENGINE == SE_HL2DM || SOURCE_ENGINE == SE_SDK2013
+	// Shim to avoid hooking shims
+	engine = (IVEngineServer *) ismm->GetEngineFactory()("VEngineServer023", nullptr);
+	if (!engine)
+	{
+		engine = (IVEngineServer *) ismm->GetEngineFactory()("VEngineServer022", nullptr);
+		if (!engine)
+		{
+			if (error && maxlen)
+			{
+				ismm->Format(error, maxlen, "Could not find interface: VEngineServer023 or VEngineServer022");
+			}
+			return false;
+		}
+	}
+#else
 	GET_V_IFACE_CURRENT(GetEngineFactory, engine, IVEngineServer, INTERFACEVERSION_VENGINESERVER);
-#endif
+#endif // TF2 / CSS / DODS / HL2DM / SDK2013
+#endif // !METAMOD_PLAPI_VERSION
 #endif //META_NO_HL2SDK
 
 	m_SourceMMLoaded = true;