--- lbbs/src/bbs_net.c	2025/11/04 13:49:51	1.76
+++ lbbs/src/bbs_net.c	2025/11/11 00:28:05	1.81
@@ -3,9 +3,13 @@
  * bbs_net
  *   - user interactive feature of site shuttle
  *
- * Copyright (C) 2004-2025 by Leaflet <leaflet@leafok.com>
+ * Copyright (C) 2004-2025  Leaflet <leaflet@leafok.com>
  */
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include "bbs.h"
 #include "common.h"
 #include "io.h"
@@ -33,11 +37,14 @@
 #include <sys/socket.h>
 #include <sys/epoll.h>
 
-#define MENU_CONF_DELIM " \t\r\n"
+static const char MENU_CONF_DELIM[] = " \t\r\n";
 
-#define MAX_PROCESS_BAR_LEN 30
-#define MAXSTATION 26 * 2
-#define STATION_PER_LINE 4
+enum _bbs_net_constant_t
+{
+	MAX_PROCESS_BAR_LEN = 30,
+	MAXSTATION = 26 * 2,
+	STATION_PER_LINE = 4,
+};
 
 struct _bbsnet_conf
 {
@@ -45,7 +52,7 @@ struct _bbsnet_conf
 	char host2[40];
 	char ip[40];
 	in_port_t port;
-	char charset[20];
+	char charset[CHARSET_MAX_LEN + 1];
 } bbsnet_conf[MAXSTATION];
 
 static MENU_SET bbsnet_menu;
@@ -476,7 +483,7 @@ static int bbsnet_connect(int n)
 		}
 		else if (nfds == 0) // timeout
 		{
-			if (time(NULL) - BBS_last_access_tm >= MAX_DELAY_TIME)
+			if (time(NULL) - BBS_last_access_tm >= BBS_max_user_idle_time)
 			{
 				break;
 			}
@@ -874,7 +881,7 @@ extern int bbs_net()
 			log_error("KEY_NULL\n");
 			goto cleanup;
 		case KEY_TIMEOUT:
-			if (time(NULL) - BBS_last_access_tm >= MAX_DELAY_TIME)
+			if (time(NULL) - BBS_last_access_tm >= BBS_max_user_idle_time)
 			{
 				log_error("User input timeout\n");
 				goto cleanup;