diff --git a/framework/BuildDefines.h b/framework/BuildDefines.h
index b0f9224..72d7cf2 100644
--- a/framework/BuildDefines.h
+++ b/framework/BuildDefines.h
@@ -115,3 +115,35 @@ If you have questions concerning this license or the applicable additional terms
 #ifndef ID_OPENAL_EAX
 #	define ID_OPENAL_EAX 0
 #endif
+
+// async network
+
+/*
+DOOM III gold:	33
+1.1 beta patch:	34
+1.1 patch:		35
+1.2 XP:			36-39
+1.3 patch:		40
+1.3.1:			41
+*/
+#define ASYNC_PROTOCOL_MINOR	(41)
+#define ASYNC_PROTOCOL_VERSION	(( ASYNC_PROTOCOL_MAJOR << 16 ) + ASYNC_PROTOCOL_MINOR)
+
+#define MAX_ASYNC_CLIENTS		(32)
+
+#define MAX_USERCMD_BACKUP		(256)
+#define MAX_USERCMD_DUPLICATION	(25)
+#define MAX_USERCMD_RELAY		(10)
+
+// index 0 is hardcoded to be the idnet master
+// which leaves 4 to user customization
+#define MAX_MASTER_SERVERS		(5)
+
+#define MAX_NICKLEN				(32)
+
+// max number of servers that will be scanned for at a single IP address
+#define MAX_SERVER_PORTS		(8)
+
+// special game init ids
+#define GAME_INIT_ID_INVALID	(-1)
+#define GAME_INIT_ID_MAP_LOAD	(-2)