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[Server code] 4.1 patch 2 private chat hook [message #489532] |
Sun, 05 October 2014 05:20 ![Go to next message Go to next message](/theme/Renegade_Forums/images/down.png) |
iRANian
Messages: 4307 Registered: April 2011
Karma: 0
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General (4 Stars) |
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The previous version stopped working because the prologue of the TT chat code I'm hooking changed, seems to be because 4.1 uses a newer C++ compiler.
int TTChatHookAddress = 0;
int TTChatHookJMPAddress = 0;
int TTPrologueFuncCallAddress = 0;
bool ReadMemory(int Address, void* Buffer, int Size)
{
bool ret = 1;
DWORD OldProtect;
HANDLE Process = OpenProcess(PROCESS_VM_READ | PROCESS_VM_WRITE | PROCESS_VM_OPERATION, false, GetCurrentProcessId());
VirtualProtectEx(Process, (LPVOID)Address, Size, PAGE_EXECUTE_READWRITE, &OldProtect);
if (!ReadProcessMemory(Process, (LPVOID)Address, Buffer, Size, NULL))
{
Console_Output("Reading process memory adress 0x%x failed\n", Address);
Console_Output("GetLastError() = %d\n", GetLastError());
ret = 0;
}
VirtualProtectEx(Process, (LPVOID)Address, Size, OldProtect, NULL);
CloseHandle(Process);
return ret;
}
bool WriteMemory(int Address, const void* Buffer, int Size)
{
bool ret = 1;
DWORD OldProtect;
HANDLE Process = OpenProcess(PROCESS_VM_READ | PROCESS_VM_WRITE | PROCESS_VM_OPERATION, false, GetCurrentProcessId());
VirtualProtectEx(Process, (LPVOID)Address, Size, PAGE_EXECUTE_READWRITE, &OldProtect);
if (!WriteProcessMemory(Process, (LPVOID)Address, Buffer, Size, NULL))
{
Console_Output("Hooking address 0x%x failed\n", Address);
Console_Output("GetLastError() = %d\n", GetLastError());
ret = 0;
}
VirtualProtectEx(Process, (LPVOID)Address, Size, OldProtect, NULL);
CloseHandle(Process);
return ret;
}
void Install_Hook(char OpCode, int Addr, int Glue, char *Padding)
{
int HookAddress = Addr;
int Offset = Glue - HookAddress - 5;
WriteMemory(HookAddress, &OpCode, 1);
WriteMemory(HookAddress+1, &Offset, 4);
};
int Calculate_Address_From_Displacement(int JMPStartAddress)
{
char OpCodes[5];
int Displacement, Address;
ReadMemory(JMPStartAddress, OpCodes, 5);
Console_Output("BYTES READ: 0x%x 0x%x 0x%x 0x%x 0x%x \n", OpCodes[0], OpCodes[1], OpCodes[2], OpCodes[3], OpCodes[4]);
memcpy(&Displacement, OpCodes+1, sizeof(char)*4); // OpCodeBuffer+1 or we'll also read the JMP opcode
Address = JMPStartAddress + 5 + Displacement;
return Address;
}
bool _cdecl Private_Chat_Hook(int PlayerID, int Type, wchar_t *Message, int TargetID)
{
if (TargetID == -2 || Type != 2) { return true; } // Only trigger on valid private chat
Console_Output("PlayerID = %d, TargetID = %d, type = %d, Message = %S\n", PlayerID, TargetID, Type, Message);
return false;
}
void _declspec(naked) PrivateChatHook_Glue()
{
_asm
{
push esi
mov eax, esi
mov esi, ecx // save ecx
push [ecx+06C0h] // arg 4, TargetID
push [ecx+06BCh] // arg 3, Message
push [ecx+06B8h] // arg 2, Type
push [ecx+06B4h] // arg 1, PlayerID
call Private_Chat_Hook
add esp, 16;
mov ecx, esi // restore ecx
test al, al
jz Block_Private_Chat
call TTPrologueFuncCallAddress
jmp TTChatHookJMPAddress
Block_Private_Chat:
pop esi
retn
}
}
// install function, OnLoadGlobalINISettings is a good place to install, the plugin constructor doesn't work
void TriggerbotAntiCheat::OnLoadGlobalINISettings(INIClass *SSGMIni)
{
TTChatHookAddress = Calculate_Address_From_Displacement(0x004B5C10); // Hook from cCsTextObj::Act(void)
TTChatHookJMPAddress = TTChatHookAddress+8;
TTPrologueFuncCallAddress = Calculate_Address_From_Displacement(TTChatHookAddress + 3);
Install_Hook('\xE9', TTChatHookAddress, (int)&PrivateChatHook_Glue, "");
}
Long time and well respected Renegade community member, programmer, modder and tester.
Scripts 4.0 private beta tester since May 2011.
My Renegade server plugins releases
[Updated on: Sun, 05 October 2014 05:26] Report message to a moderator
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