RADIUS server: Increase maximum number of sessions

It was possible to hit the previously used maximum of 100 active session
in some hwsim test case sequences like this one: eap_proto_pwd_errors
eap_proto_ikev2_errors eap_proto_sim_errors. This happened due to the
large number of RADIUS authentication iterations in short period of
time, i.e., within the 10 second timeout for expiring completed
sessions.

Increase RADIUS_MAX_SESSION from 100 to 1000 and also reduce the timeout
on expiring completed sessions from 10 to 5 seconds.

Signed-off-by: Jouni Malinen <j@w1.fi>

src/radius/radius_server.c

@@ -25,10 +25,15 @@
  */
 #define RADIUS_SESSION_TIMEOUT 60
 
+/**
+ * RADIUS_SESSION_MAINTAIN - Completed session expiration timeout in seconds
+ */
+#define RADIUS_SESSION_MAINTAIN 5
+
 /**
  * RADIUS_MAX_SESSION - Maximum number of active sessions
  */
-#define RADIUS_MAX_SESSION 100
+#define RADIUS_MAX_SESSION 1000
 
 /**
  * RADIUS_MAX_MSG_LEN - Maximum message length for incoming RADIUS messages
@@ -1172,7 +1177,7 @@ send_reply:
 			     sess->sess_id);
 		eloop_cancel_timeout(radius_server_session_remove_timeout,
 				     data, sess);
-		eloop_register_timeout(10, 0,
+		eloop_register_timeout(RADIUS_SESSION_MAINTAIN, 0,
 				       radius_server_session_remove_timeout,
 				       data, sess);
 	}