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main.cpp

@@ -0,0 +1,141 @@
+#undef __STRICT_ANSI__
+#include "main.h"
+#include <iostream>
+#include <fstream>
+
+
+UINT_PTR base;
+
+
+_declspec(naked) void DLL_EXPORT ASMHandleMessage(){
+
+    //asm("lea eax, [ebp - 0x50]");
+    asm("lea eax, [ebp- 0x128 + 0x4]");
+    asm("mov eax, [eax]"); //get message
+    asm("push eax");
+    asm("call [_HandleMessagePtr]");
+    asm("cmp eax, 0"); //message ptr
+    asm("je 0f");
+
+    asm("1:");
+    asm("push eax");
+    asm("lea ecx, [ebp - 0x68]");
+
+    asm("mov eax, [_base]");
+    asm("add eax, 0xEB60");
+    asm("call eax");
+
+    asm("mov ecx, [edi+0x800A14]");
+    asm("lea eax, [ebp - 0x38]");
+    asm("push eax");
+    asm("lea eax, [ebp - 0x68]");
+    asm("push eax");
+
+    asm("mov byte ptr [ebp - 0x4], 0x8");
+    asm("mov dword ptr [ebp - 0x38], 0x3F800000");
+    asm("mov dword ptr [ebp - 0x34], 0x3F25A1CB");
+    asm("mov dword ptr [ebp - 0x30], 0x3F800000");
+    asm("mov dword ptr [ebp - 0x2C], 0x3F800000");
+
+    asm("mov eax, [_base]");
+    asm("add eax, 0x3AB30");
+    asm("call eax");
+
+    asm("lea ecx, [ebp - 0x68]");
+
+    asm("mov eax, [_base]");
+    asm("add eax, 0x193E50");
+    asm("call eax");
+
+    asm("lea ecx, [ebp - 0x28]");
+    asm("mov byte ptr [ebp - 0x4], 0x4");
+
+    asm("mov eax, [_base]");
+    asm("add eax, 0x193E50");
+    asm("call eax");
+
+    asm("mov ecx, [_base]"); //jump to end
+    asm("add ecx, 0x7E6BF");
+    asm("jmp ecx");
+
+
+    asm("0:"); //exit normally
+    asm("mov eax, [_base]"); //jump back
+    asm("add eax, 0x7E621");
+    asm("cmp dword ptr [edi + 0x8006CC], 0"); //original comparison
+    asm("jmp eax");
+}
+
+wchar_t* DLL_EXPORT HandleMessage(wchar_t msg[]){
+    wchar_t response[255];
+    DWORD entityaddr = (DWORD)(base + 0x36b1c8);
+    entityaddr = *(DWORD*)entityaddr;
+    entityaddr += 0x39C;
+    entityaddr = *(DWORD*)entityaddr;
+
+    long long unsigned int* x = (long long unsigned int*)(entityaddr+0x10);
+    long long unsigned int* y = (long long unsigned int*)(entityaddr+0x18);
+    long long unsigned int* z = (long long unsigned int*)(entityaddr+0x20);
+
+    if(!wcscmp(msg, L"/coords")){
+        swprintf(response, L"X: %llu\nY: %llu\nZ: %llu\n", *x, *y, *z);
+        return response;
+    }
+
+    else if(!wcscmp(msg, L"/chunks")){
+        unsigned int chunkx = *x / 0x1000000;
+        unsigned int chunky = *y / 0x1000000;
+        swprintf(response, L"X: Chunk %u\nY: Chunk %u\nZ: %llu\n", chunkx, chunky, *z);
+        return response;
+
+    }
+
+    else{
+        long long unsigned int targetx, targety, targetz;
+        if ( swscanf(msg, L"/tp %llu %llu %llu", &targetx, &targety, &targetz) == 3){
+            *x = targetx;
+            *y = targety;
+            *z = targetz;
+            swprintf(response, L"Teleporting.", targetx);
+            return response;
+        }
+        else if ( swscanf(msg, L"/tpch %llu %llu", &targetx, &targety) == 2){
+            *x = targetx * 0x1000000;
+            *y = targety * 0x1000000;
+            swprintf(response, L"Teleporting.", targetx);
+            return response;
+        }
+
+    }
+
+    return NULL;
+
+
+
+}
+DWORD HandleMessagePtr = (DWORD)&HandleMessage;
+
+
+void WriteJMP(BYTE* location, BYTE* newFunction){
+	DWORD dwOldProtection;
+	VirtualProtect(location, 5, PAGE_EXECUTE_READWRITE, &dwOldProtection);
+    location[0] = 0xE9; //jmp
+    *((DWORD*)(location + 1)) = (DWORD)(( (unsigned INT32)newFunction - (unsigned INT32)location ) - 5);
+	VirtualProtect(location, 5, dwOldProtection, &dwOldProtection);
+}
+
+
+extern "C" DLL_EXPORT BOOL APIENTRY DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
+{
+    base = (UINT_PTR)GetModuleHandle(NULL);
+    switch (fdwReason)
+    {
+
+        case DLL_PROCESS_ATTACH:
+            WriteJMP((BYTE*)(base + 0x7E61A), (BYTE*)&ASMHandleMessage); //This code forces the server to generate the correct chunk
+
+            break;
+;
+    }
+    return TRUE;
+}