shithook/Hook.cpp

#include "Hook.hpp"

namespace Hook
{
	//--- default constructor
	Detour::Detour(uintptr_t addrToHook, uintptr_t jmpTo)
		: HookAddress(addrToHook), DetourAddress(jmpTo)
	{
		//finish the shellcode by adding the address to jmp to
		*(uintptr_t*)(jmpCode + OFFSET_TO_ADDRESS) = jmpTo;
		//save old bytes
		memcpy(originalBytes, (void*)HookAddress, JMP_CODE_SIZE);
		//install the hook.
		InstallHook();
	}

	Detour::~Detour()
	{UninstallHook();}

	void Detour::InstallHook()
	{
		//install the hook.
		WriteToReadOnly(HookAddress, (void *)jmpCode, JMP_CODE_SIZE);
		isHookInstalled = true;
	}

	void Detour::UninstallHook()
	{
		//write the original bytes back.
		WriteToReadOnly(HookAddress, originalBytes, JMP_CODE_SIZE);
		isHookInstalled = false;
	}

	uintptr_t Detour::GetHookAddress()
	{return HookAddress;}

	uintptr_t Detour::GetDetourAddress()
	{return DetourAddress;}

	bool Detour::IsInstalled()
	{return isHookInstalled;}
}