ds@913: /**
ds@913:  * antiflood.sp
ds@913:  * Protects against chat flooding.
ds@913:  * This file is part of SourceMod, Copyright (C) 2004-2007 AlliedModders LLC
ds@913:  *
ds@913:  * This program is free software; you can redistribute it and/or
ds@913:  * modify it under the terms of the GNU General Public License
ds@913:  * as published by the Free Software Foundation; either version 2
ds@913:  * of the License, or (at your option) any later version.
ds@913:  *
ds@913:  * This program is distributed in the hope that it will be useful,
ds@913:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
ds@913:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
ds@913:  * GNU General Public License for more details.
ds@913:  * 
ds@913:  * You should have received a copy of the GNU General Public License
ds@913:  * along with this program; if not, write to the Free Software
ds@913:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
ds@913:  *
ds@913:  * Version: $Id$
ds@913:  */
ds@989:  
ds@989: #pragma semicolon 1
ds@913: 
ds@913: #include <sourcemod>
ds@913: 
ds@913: public Plugin:myinfo = 
ds@913: {
ds@913: 	name = "Anti-Flood",
ds@913: 	author = "AlliedModders LLC",
ds@913: 	description = "Protects against chat flooding",
ds@913: 	version = SOURCEMOD_VERSION,
ds@913: 	url = "http://www.sourcemod.net/"
ds@913: };
ds@913: 
ds@913: new Float:g_LastTime[MAXPLAYERS + 1] = {0.0, ...};		/* Last time player used say or say_team */
ds@913: new g_FloodTokens[MAXPLAYERS + 1] = {0, ...};			/* Number of flood tokens player has */
ds@913: 
ds@913: new Handle:sm_flood_time;								/* Handle to sm_flood_time convar */
ds@913: 
ds@913: public OnPluginStart()
ds@913: {
dvander@1027: 	LoadTranslations("plugin.antiflood");
ds@913: 	
ds@913: 	RegConsoleCmd("say", CheckChatFlood);
ds@913: 	RegConsoleCmd("say_team", CheckChatFlood);
ds@913: 	sm_flood_time = CreateConVar("sm_flood_time", "0.75", "Amount of time allowed between chat messages");
ds@913: }
ds@913: 
ds@913: public Action:CheckChatFlood(client, args)
ds@913: {
ds@913: 	/* Chat from server console shouldn't be checked for flooding */
ds@913: 	if (client == 0)
ds@913: 	{
ds@913: 		return Plugin_Continue;
ds@913: 	}
ds@913: 	
ds@913: 	new Float:maxChat = GetConVarFloat(sm_flood_time);
ds@913: 	
ds@913: 	if (maxChat > 0.0)
ds@913: 	{
ds@913: 		new Float:curTime = GetGameTime();
ds@913: 		
ds@913: 		if (g_LastTime[client] > curTime)
ds@913: 		{
ds@913: 			/* If player has 3 or more flood tokens, block their message */
ds@913: 			if (g_FloodTokens[client] >= 3)
ds@913: 			{
ds@913: 				PrintToChat(client, "[SM] %t", "Flooding the server");
ds@913: 				g_LastTime[client] = curTime + maxChat + 3.0;
ds@913: 				
ds@913: 				return Plugin_Stop;	
ds@913: 			}
ds@913: 			
ds@913: 			/* Add one flood token when player goes over chat time limit */
ds@913: 			g_FloodTokens[client]++;
ds@913: 		} else if (g_FloodTokens[client]) {
ds@913: 			/* Remove one flood token when player chats within time limit (slow decay) */
ds@913: 			g_FloodTokens[client]--;
ds@913: 		}
ds@913: 		
ds@913: 		/* Store last time of chat usage */
ds@913: 		g_LastTime[client] = curTime + maxChat;
ds@913: 	}
ds@913: 	
ds@913: 	return Plugin_Continue;
ds@913: }