--- lbbs/src/common.c	2025/05/05 11:11:06	1.14
+++ lbbs/src/common.c	2025/05/06 13:28:38	1.16
@@ -1,16 +1,15 @@
 /***************************************************************************
 						  common.c  -  description
 							 -------------------
-	begin                : Mon Oct 18 2004
-	copyright            : (C) 2004 by Leaflet
-	email                : leaflet@leafok.com
+	Copyright            : (C) 2004-2025 by Leaflet
+	Email                : leaflet@leafok.com
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
- *   the Free Software Foundation; either version 2 of the License, or     *
+ *   the Free Software Foundation; either version 3 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  ***************************************************************************/
@@ -94,9 +93,13 @@ const char *get_time_str(char *s, size_t
 void reload_bbs_menu(int i)
 {
 	if (reload_menu(&bbs_menu) < 0)
+	{
 		log_error("Reload menu failed\n");
+	}
 	else
+	{
 		log_std("Reload menu successfully\n");
+	}
 }
 
 void system_exit(int i)
@@ -116,3 +119,41 @@ void child_exit(int i)
 		log_std("Child process (%d) exited\n", pid);
 	}
 }
+
+const char * ip_mask(char * s, int level, char mask)
+{
+	char * p = s;
+
+	if (level <= 0)
+	{
+		return s;
+	}
+	if (level > 4)
+	{
+		level = 4;
+	}
+
+	for (int i = 0; i < 4 - level; i++)
+	{
+		p = strchr(p, '.');
+		if (p == NULL)
+		{
+			return s;
+		}
+		p++;
+	}
+
+	for (int i = 0; i < level; i++)
+	{
+		*p = mask;
+		p++;
+		if (i < level - 1)
+		{
+			*p = '.';
+			p++;
+		}
+	}
+	*p = '\0';
+
+	return s;
+}