[Arkshine]

To block, don't call original function.

[Bos93]

I want to try blocking RoundEnd with my module. I have hooked sub_100CFCD0,

PHP Code:

short pattern[] = {0x8B, 0x4C, -1, -1, 0x8D, 0x44, -1, -1, 0x50, 0x51, 0x68, -1, -1, -1, -1, 0xE8, -1, -1, -1, -1, 0x68, -1, -1, -1, -1, 0x68, -1, -1, -1, -1, 0x6A, 0x05, 0xFF, -1, -1, -1 , -1, -1, 0x83, 0xC4, -1};

int sub_100CFCD0(const char *Format, ...)
{
  va_list va; // [sp+8h] [bp+8h]@1

  va_start(va, Format);
  vsprintf(byte_10175C48, Format, va);
  return ((int (*)(signed int, const char *, ...))dword_10162434)(5, "%s");
}

void HOOK(const char *Format)
{
    print_srvconsole( "%s\n",Format);
} 


its working


but I dont understand how to block it

[Arkshine]

This is not this function if you want to block round end.

[Bos93]

return sub_100CFCD0("World triggered \"Round_End\"\n");

called is int sub_100CFCD0(const char *Format, ...)

can you tell me what function I need to hook. And explain detailed how to block it

[Arkshine]

CHalfLifeMultiplay::CheckWinConditions() and to block, just don't return original function. But blocking the whole function is not a good idea, the first part of the function is a loop to update players count. You can check my InfiniteRound plugin (the v2 version).

[Bos93]

I hook function

void HooK_CheckWinCondition( int this )
{
But I do not understand how to not return the original function
}

I'll watch your plugin

PHP Code:

bool createPatch()
{
    short pattern[] = {0x83,0xEC,0x38,0x53,0x55,0x8B,0xE9,0x56,0x33,0xF6,0x57,0x8A,0x85,0xB4,0x02,0x00,0x00,0x89,0x74,0x24,0x10,0x84,0xC0,0x74,-1,0x39,0x75,0x74,0x0F,0x85,-1,-1,-1,-1};

// signature from "Round Terminator"
    
    int pLength = sizeof(pattern)/sizeof(short);

    bool findet = false;

    HMODULE module;
    if(GetModuleHandleEx(0,(LPCSTR)"mp.dll",&module))
    {
        HANDLE process =  GetCurrentProcess();
        _MODULEINFO moduleInfo;
        
        if(GetModuleInformation(process,module,&moduleInfo,sizeof moduleInfo))
        {
            
            CloseHandle(process);

            unsigned char * baseAdress =  (unsigned char *) moduleInfo.lpBaseOfDll;
            DWORD length = moduleInfo.SizeOfImage;

            
            for(unsigned int i=0; i <= length - pLength ;i++)
            {
                if (comparePattern(pattern, baseAdress + i, pLength))
                {
                    findet = true;

                    pathAddr = baseAdress + i;
                }
                
            }
        }

    }
    else
    {
        SERVER_PRINT("Error locate module mp.dll");
        return false;
    }

    if (!findet)
    {
        SERVER_PRINT("Cant find patch!");
        return false;
    }

    p = (void (*)(int *))pathAddr;

    memcpy((void *)originalBytes, pathAddr, 5);

    pathedBytes[0] = 0xE9;
    *((long*)(&pathedBytes[1])) = (char*)HooK_CheckWinCondition - (char*)pathAddr - 5;

    DWORD oldProtection;

    if(VirtualProtect(pathAddr, 5, PAGE_EXECUTE_READWRITE, &oldProtection))
        return true;

    return false;
} 


[Arkshine]

But I do not understand how to not return the original function

Look, the way you hook, you redirect original call to your function in the module. By doing nothing, you block the original function. If you want to do stuffs and not blocking the original function, you would do insert your code, then after you would call the original function from it's real address. To block it, you simply don't call the original function from it's real address.

[Bos93]

Thank you very much Arkshine!

I'll try to

[Bos93]

roundTimeCheck - Block to the end, when the time is exactly zero?

I'm hook roundTimeCheck and time = 00:00 server crash ( not return the original function )

CheckWinCondition - Block to the end, when the team wins or a bomb explodes?

[Bos93]

I'm hook CheckWinCondition

I'm write kill in console - Round is not over

it's worked

But otherwise the round ends