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l4d2_console_buffer.sp
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l4d2_console_buffer.sp
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#define PLUGIN_VERSION "1.10"
/*======================================================================================
Plugin Info:
* Name : [L4D2] Linux Console - Buffer Overflow Fix
* Author : SilverShot
* Descrp : Fixes the 'Cbuf_AddText: buffer overflow' console error on Linux servers.
* Plugins : http://sourcemod.net/plugins.php?exact=exact&sortby=title&search=1&author=Silvers
========================================================================================
Change Log:
1.0 (27-Jun-2018)
- Initial release.
======================================================================================*/
#pragma semicolon 1
#pragma newdecls required
#include <sourcemod>
#include <sdktools>
public Plugin myinfo =
{
name = "[L4D2] Linux Console - Buffer Overflow Fix",
author = "SilverShot",
description = "Fixes the 'Cbuf_AddText: buffer overflow' console error on Linux servers.",
version = PLUGIN_VERSION,
url = "http://forums.alliedmods.net/showthread.php?t=308483"
}
public APLRes AskPluginLoad2(Handle myself, bool late, char[] error, int err_max)
{
if( GetEngineVersion() != Engine_Left4Dead2 )
{
strcopy(error, err_max, "Plugin only supports Left 4 Dead 2.");
return APLRes_SilentFailure;
}
return APLRes_Success;
}
public void OnPluginStart()
{
CreateConVar("l4d2_linux_console_fix_version", PLUGIN_VERSION, "Linux Console Fix plugin version.", FCVAR_NOTIFY|FCVAR_DONTRECORD);
// ====================================================================================================
// Write GameData
// ====================================================================================================
char sPath[PLATFORM_MAX_PATH];
BuildPath(Path_SM, sPath, sizeof(sPath), "gamedata/l4d2_console_buffer.txt");
if( !FileExists(sPath) )
{
File hFile = OpenFile(sPath, "w+");
if( hFile == null )
SetFailState("Error: Couldn't create gamedata file.");
hFile.WriteLine("\"Games\"");
hFile.WriteLine("{");
hFile.WriteLine(" \"left4dead2\"");
hFile.WriteLine(" {");
hFile.WriteLine(" \"Addresses\"");
hFile.WriteLine(" {");
hFile.WriteLine(" \"Cbuf_AddText_Fix\"");
hFile.WriteLine(" {");
hFile.WriteLine(" \"linux\"");
hFile.WriteLine(" {");
hFile.WriteLine(" \"signature\" \"Cbuf_AddText_Sig\"");
hFile.WriteLine(" }");
hFile.WriteLine(" }");
hFile.WriteLine(" }");
hFile.WriteLine(" \"Offsets\"");
hFile.WriteLine(" {");
hFile.WriteLine(" \"Cbuf_AddText_Offset\"");
hFile.WriteLine(" {");
hFile.WriteLine(" \"linux\" \"167\"");
hFile.WriteLine(" }");
hFile.WriteLine(" }");
hFile.WriteLine(" \"Signatures\"");
hFile.WriteLine(" {");
hFile.WriteLine(" /*");
hFile.WriteLine(" * int __cdecl sub_34B2C0(int, void *src, int)");
hFile.WriteLine(" */");
hFile.WriteLine(" \"Cbuf_AddText_Sig\"");
hFile.WriteLine(" {");
hFile.WriteLine(" \"library\" \"engine\"");
hFile.WriteLine(" \"linux\" \"\\x55\\x89\\x2A\\x83\\x2A\\x2A\\xE8\\x2A\\x2A\\x2A\\x2A\\x89\\x2A\\xA1\\x2A\\x2A\\x2A\\x2A\\x39\\x2A\\x74\\x2A\\x31\\x2A\\xF0\\x2A\\x2A\\x2A\\x2A\\x2A\\x2A\\x2A\\x75\\x2A\\xA1\\x2A\\x2A\\x2A\\x2A\\x83\\x2A\\x01\\xA3\\x2A\\x2A\\x2A\\x2A\\x8B\\x2A\\x2A\\x89\\x2A\\x2A\\x2A\\x8B\\x2A\\x2A\\x89\\x2A\\x2A\\x2A\\x69\"");
hFile.WriteLine(" /* 55 89 ? 83 ? ? E8 ? ? ? ? 89 ? A1 ? ? ? ? 39 ? 74 ? 31 ? F0 ? ? ? ? ? ? ? 75 ? A1 ? ? ? ? 83 ? 01 A3 ? ? ? ? 8B ? ? 89 ? ? ? 8B ? ? 89 ? ? ? 69 */");
hFile.WriteLine(" /* Search: \"Cbuf_AddText: buffer overflow\\n\" */");
hFile.WriteLine(" }");
hFile.WriteLine(" }");
hFile.WriteLine(" }");
hFile.WriteLine("}");
delete hFile;
}
// ====================================================================================================
// GameData
// ====================================================================================================
Handle hGameConf = LoadGameConfigFile("l4d2_console_buffer");
if( hGameConf == null ) SetFailState("Failed to load gamedata/l4d2_console_buffer.");
int offset = GameConfGetOffset(hGameConf, "Cbuf_AddText_Offset");
if( offset == -1 ) SetFailState("Plugin is for Linux only.");
Address patch = GameConfGetAddress(hGameConf, "Cbuf_AddText_Fix");
delete hGameConf;
if( !patch ) SetFailState("Error finding the 'Cbuf_AddText_Fix' signature.");
int byte = LoadFromAddress(patch + view_as<Address>(offset), NumberType_Int8);
if( byte == 0xE8 )
{
for( int i = 0; i < 5; i++ )
StoreToAddress(patch + view_as<Address>(offset + i), 0x90, NumberType_Int8);
}
else if( byte != 0x90 )
{
SetFailState("Error: the 'Cbuf_AddText_Offset' is incorrect.");
}
}