#include "pch.h" #include "securitypatches.h" #include "hookutils.h" #include "concommand.h" #include "dedicated.h" #include "gameutils.h" typedef bool(*IsValveModType)(); IsValveModType IsValveMod; bool IsValveModHook() { // basically: by default r2 isn't set as a valve mod, meaning that m_bRestrictServerCommands is false // this is HORRIBLE for security, because it means servers can run arbitrary concommands on clients // especially since we have script commands this could theoretically be awful return !CommandLine()->CheckParm("-norestrictservercommands"); } void InitialiseClientEngineSecurityPatches(HMODULE baseAddress) { if (IsDedicated()) return; HookEnabler hook; // note: this could break some things ENABLER_CREATEHOOK(hook, (char*)baseAddress + 0x1C6360, &IsValveModHook, reinterpret_cast<LPVOID*>(&IsValveMod)); // patches to make commands run from client/ui script still work // note: this is likely preventable in a nicer way? test prolly { void* ptr = (char*)baseAddress + 0x4FB65; TempReadWrite rw(ptr); *((char*)ptr) = (char)0xEB; *((char*)ptr + 1) = (char)0x11; } { void* ptr = (char*)baseAddress + 0x4FBAC; TempReadWrite rw(ptr); *((char*)ptr) = (char)0xEB; *((char*)ptr + 1) = (char)0x16; } // byte patches to patch concommands that this messes up that we need { // disconnect concommand void* ptr = (char*)baseAddress + 0x5ADA2D; TempReadWrite rw(ptr); *((int*)ptr) |= FCVAR_SERVER_CAN_EXECUTE; } }