r5sdk/r5dev/client/cdll_engine_int.cpp

//=============================================================================
//
//
//=============================================================================

#include "core/stdafx.h"
/*****************************************************************************/
#include "tier1/cvar.h"
#include "tier0/commandline.h"
#include "tier1/IConVar.h"
#include "client/vengineclient_impl.h"
#include "client/cdll_engine_int.h"
#include "engine/net_chan.h"
#include "engine/client/cl_rcon.h"
#include "public/include/bansystem.h"
#include "vpc/keyvalues.h"
/*****************************************************************************/

//-----------------------------------------------------------------------------
// Purpose: 
//-----------------------------------------------------------------------------
void CHLClient::FrameStageNotify(CHLClient* pHLClient, ClientFrameStage_t frameStage)
{
	switch (frameStage)
	{
		case ClientFrameStage_t::FRAME_START: // FrameStageNotify gets called every frame by CEngine::Frame with the stage being FRAME_START. We can use this to check/set global variables.
		{
			break;
		}
		case ClientFrameStage_t::FRAME_NET_UPDATE_POSTDATAUPDATE_END:
		{
			gHLClient->PatchNetVarConVar();
			break;
		}
		default:
		{
			break;
		}
	}
	CHLClient_FrameStageNotify(pHLClient, frameStage);
}

//-----------------------------------------------------------------------------
// Purpose: Get g_pClientClassHead Pointer for all ClientClasses.
// Input  :
// Output : ClientClass*
//-----------------------------------------------------------------------------
ClientClass* CHLClient::GetAllClasses()
{
	return CHLClient_GetAllClasses();
}

//-----------------------------------------------------------------------------
// Purpose: 
//-----------------------------------------------------------------------------
void CHLClient::PatchNetVarConVar(void) const
{
#ifdef GAMEDLL_S3
	static bool bASLR = true;
	static bool bInit = false;
	static void* pCVar = 0;

	if (!bASLR && !bInit)
	{
		CHAR sConVarPtr[] = "\x72\x3a\x73\x76\x72\x75\x73\x7a\x7a\x03\x04";
		PCHAR curr = sConVarPtr;
		while (*curr)
		{
			*curr ^= 'B';
			++curr;
		}

		stringstream ss;
		ss << std::hex << string(sConVarPtr);
		ss >> pCVar;
		bInit = true;
	}
	else if (!bInit)
	{
		CMemory mCVar = g_mGameDll.FindPatternSIMD(reinterpret_cast<rsig_t>("\xF3\x0F\x11\x83\x8C\x21\x00\x00"), "xxxxxxxx");
		pCVar = mCVar.RCast<void*>();
		bInit = true;
	}

	if (*reinterpret_cast<uint8_t*>(pCVar) == 144)
	{
		uint8_t padding[] =
		{
			0x48, 0x8B, 0x45, 
			0x58, 0xC7, 0x00, 
			0x00, 0x00, 0x00, 
			0x00
		};

		void* pCallback = nullptr;
		VirtualAlloc(pCallback, 10, MEM_COMMIT | MEM_RESERVE, PAGE_EXECUTE_READWRITE);
		memcpy(pCallback, reinterpret_cast<void*>(padding), 9);
		reinterpret_cast<void(*)()>(pCallback)();
	}
#endif // GAMEDLL_S3
}

///////////////////////////////////////////////////////////////////////////////
void CHLClient_Attach()
{
	DetourAttach((LPVOID*)&CHLClient_FrameStageNotify, &CHLClient::FrameStageNotify);
}

void CHLClient_Detach()
{
	DetourDetach((LPVOID*)&CHLClient_FrameStageNotify, &CHLClient::FrameStageNotify);
}