detector.patch

diff -r dd56a497bb3b server/server.h
--- a/server/server.h	Tue Sep 04 07:31:03 2012 +0000
+++ b/server/server.h	Tue Oct 02 10:24:55 2012 +0000
@@ -271,6 +271,9 @@
 
 	//ugly hack for variable FPS support dropping s.event
 	int							entity_events[MAX_EDICTS];
+
+	usercmd_t cmdHist[2];
+	int snaps;
 } client_t;
 
 // a client can leave the server in one of four ways:
diff -r dd56a497bb3b server/sv_user.c
--- a/server/sv_user.c	Tue Sep 04 07:31:03 2012 +0000
+++ b/server/sv_user.c	Tue Oct 02 10:24:55 2012 +0000
@@ -2470,6 +2470,21 @@
 	if (cl->commandMsec < 0 && sv_enforcetime->intvalue)
 		return;
 
+	if ( !(cmd->buttons & BUTTON_ATTACK) && (cl->cmdHist[0].buttons & BUTTON_ATTACK) && !(cl->cmdHist[1].buttons & BUTTON_ATTACK) ) {
+		const int16 deltaLast[2] = { abs(cmd->angles[0] - cl->cmdHist[0].angles[0]), abs(cmd->angles[1] - cl->cmdHist[0].angles[1]) };
+		const int16 deltaPrev[2] = { abs(cmd->angles[0] - cl->cmdHist[1].angles[0]), abs(cmd->angles[1] - cl->cmdHist[1].angles[1]) };
+		const int16 oldDelta[2]  = { abs(cl->cmdHist[0].angles[0] - cl->cmdHist[1].angles[0]), abs(cl->cmdHist[0].angles[1] - cl->cmdHist[1].angles[1]) };
+		if ( deltaLast[0] > deltaPrev[0] && deltaLast[1] > deltaPrev[1] &&
+		     oldDelta [0] > deltaPrev[0] && oldDelta [1] > deltaPrev[1] ) {
+			if (++cl->snaps > 2) {
+				SV_KickClient(cl, "probable aimbot detected", "probable aimbot detected");
+				return;
+			}
+		}
+	}
+	cl->cmdHist[1] = cl->cmdHist[0];
+	cl->cmdHist[0] = *cmd;
+
 	interpolate = qfalse;
 
 	//r1: interpolate the move over the msec to smooth out