3 is the update, 2 is actually the stop

lib/smradius/daemon.pm

@@ -888,7 +888,7 @@ sub process_request {
 		);
 
 		# CoA and POD only apply to accounting updates...
-		if ($pkt->rawattr('Acct-Status-Type') eq "2") {
+		if ($pkt->rawattr('Acct-Status-Type') eq "3") {
 
 			# Build a list of our attributes in the packet
 			my $acctAttributes;