#include #include #include #include #include #include #include #include #include "../init/init.h" #include "../feature/feature.h" #include "misc.h" // Maximum Username Length #define MAX_USERNAME_LENGTH 16 // Additional GUI Rendering static int hide_chat_messages = 0; static int render_selected_item_text = 0; static void Gui_renderChatMessages_injection(unsigned char *gui, int32_t y_offset, uint32_t max_messages, bool disable_fading, unsigned char *font) { // Call Original Method if (!hide_chat_messages) { (*Gui_renderChatMessages)(gui, y_offset, max_messages, disable_fading, font); } // Render Selected Item Text if (render_selected_item_text) { // Fix GL Mode glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); // Calculate Selected Item Text Scale unsigned char *minecraft = *(unsigned char **) (gui + Gui_minecraft_property_offset); int32_t screen_width = *(int32_t *) (minecraft + Minecraft_screen_width_property_offset); float scale = ((float) screen_width) * *InvGuiScale; // Render Selected Item Text (*Gui_renderOnSelectItemNameText)(gui, (int32_t) scale, font, y_offset - 0x13); } } // Reset Selected Item Text Timer On Slot Select static uint32_t reset_selected_item_text_timer = 0; static void Gui_tick_injection(unsigned char *gui) { // Call Original Method (*Gui_tick)(gui); // Handle Reset if (render_selected_item_text) { float *selected_item_text_timer = (float *) (gui + Gui_selected_item_text_timer_property_offset); if (reset_selected_item_text_timer) { // Reset *selected_item_text_timer = 0; reset_selected_item_text_timer = 0; } } } // Trigger Reset Selected Item Text Timer On Slot Select static void Inventory_selectSlot_injection(unsigned char *inventory, int32_t slot) { // Call Original Method (*Inventory_selectSlot)(inventory, slot); // Trigger Reset Selected Item Text Timer if (render_selected_item_text) { reset_selected_item_text_timer = 1; } } // Sanitize Username static void LoginPacket_read_injection(unsigned char *packet, unsigned char *bit_stream) { // Call Original Method (*LoginPacket_read)(packet, bit_stream); // Prepare unsigned char *rak_string = packet + LoginPacket_username_property_offset; // Get Original Username unsigned char *shared_string = *(unsigned char **) (rak_string + RakNet_RakString_sharedString_property_offset); char *c_str = *(char **) (shared_string + RakNet_RakString_SharedString_c_str_property_offset); // Sanitize char *new_username = strdup(c_str); ALLOC_CHECK(new_username); sanitize_string(&new_username, MAX_USERNAME_LENGTH, 0); // Set New Username (*RakNet_RakString_Assign)(rak_string, new_username); // Free free(new_username); } // Fix RakNet::RakString Security Bug // // RakNet::RakString's format constructor is often given unsanitized user input and is never used for formatting, // this is a massive security risk, allowing clients to run arbitrary format specifiers, this disables the // formatting functionality. static unsigned char *RakNet_RakString_injection(unsigned char *rak_string, const char *format, ...) { // Call Original Method return (*RakNet_RakString)(rak_string, "%s", format); } // Print Error Message If RakNet Startup Fails static char *RAKNET_ERROR_NAMES[] = { "Success", "Already Started", "Invalid Socket Descriptors", "Invalid Max Connections", "Socket Family Not Supported", "Part Already In Use", "Failed To Bind Port", "Failed Test Send", "Port Cannot Be 0", "Failed To Create Network Thread", "Couldn't Generate GUID", "Unknown" }; #ifdef MCPI_SERVER_MODE #define PRINT_RAKNET_STARTUP_FAILURE ERR #else #define PRINT_RAKNET_STARTUP_FAILURE WARN #endif static RakNet_StartupResult RakNetInstance_host_RakNet_RakPeer_Startup_injection(unsigned char *rak_peer, unsigned short maxConnections, unsigned char *socketDescriptors, uint32_t socketDescriptorCount, int32_t threadPriority) { // Call Original Method RakNet_StartupResult result = (*RakNet_RakPeer_Startup)(rak_peer, maxConnections, socketDescriptors, socketDescriptorCount, threadPriority); // Print Error if (result != RAKNET_STARTED) { PRINT_RAKNET_STARTUP_FAILURE("Failed To Start RakNet: %s", RAKNET_ERROR_NAMES[result]); } // Return return result; } // Fix Bug Where RakNetInstance Starts Pinging Potential Servers Before The "Join Game" Screen Is Opened static unsigned char *RakNetInstance_injection(unsigned char *rak_net_instance) { // Call Original Method unsigned char *result = (*RakNetInstance)(rak_net_instance); // Fix *(unsigned char *) (rak_net_instance + RakNetInstance_pinging_for_hosts_property_offset) = 0; // Return return result; } // Close Current Screen On Death To Prevent Bugs static void LocalPlayer_die_injection(unsigned char *entity, unsigned char *cause) { // Close Screen unsigned char *minecraft = *(unsigned char **) (entity + LocalPlayer_minecraft_property_offset); (*Minecraft_setScreen)(minecraft, NULL); // Call Original Method (*LocalPlayer_die)(entity, cause); } // Fix Furnace Not Checking Item Auxiliary When Inserting New Item static int32_t FurnaceScreen_handleAddItem_injection(unsigned char *furnace_screen, int32_t slot, ItemInstance const *item) { // Get Existing Item unsigned char *tile_entity = *(unsigned char **) (furnace_screen + FurnaceScreen_tile_entity_property_offset); unsigned char *tile_entity_vtable = *(unsigned char **) tile_entity; FurnaceTileEntity_getItem_t FurnaceTileEntity_getItem = *(FurnaceTileEntity_getItem_t *) (tile_entity_vtable + FurnaceTileEntity_getItem_vtable_offset); ItemInstance *existing_item = (*FurnaceTileEntity_getItem)(tile_entity, slot); // Check Item int valid; if (item->id == existing_item->id && item->auxiliary == existing_item->auxiliary) { // Item Matches, Is Valid valid = 1; } else { // Item Doesn't Match, Check If Existing Item Is Empty if ((existing_item->id | existing_item->count | existing_item->auxiliary) == 0) { // Existing Item Is Empty, Is Valid valid = 1; } else { // Existing Item Isn't Empty, Isn't Valid valid = 0; } } // Call Original Method if (valid) { // Valid return (*FurnaceScreen_handleAddItem)(furnace_screen, slot, item); } else { // Invalid return 0; } } // Custom Cursor Rendering // // The default behavior for Touch GUI is to only render the cursor when the mouse is clicking, this fixes that. // This also makes the cursor always render if the mouse is unlocked, instead of just when there is a Screen showing. static void GameRenderer_render_injection(unsigned char *game_renderer, float param_1) { // Call Original Method (*GameRenderer_render)(game_renderer, param_1); // Check If Cursor Should Render if (SDL_WM_GrabInput(SDL_GRAB_QUERY) == SDL_GRAB_OFF) { // Get X And Y float x = (*Mouse_getX)() * (*InvGuiScale); float y = (*Mouse_getY)() * (*InvGuiScale); // Render Cursor unsigned char *minecraft = *(unsigned char **) (game_renderer + GameRenderer_minecraft_property_offset); (*renderCursor)(x, y, minecraft); } } // Init void init_misc() { // Remove Invalid Item Background (A Red Background That Appears For Items That Are Not Included In The gui_blocks Atlas) if (feature_has("Remove Invalid Item Background", server_disabled)) { unsigned char invalid_item_background_patch[4] = {0x00, 0xf0, 0x20, 0xe3}; // "nop" patch((void *) 0x63c98, invalid_item_background_patch); } // Render Selected Item Text + Hide Chat Messages hide_chat_messages = feature_has("Hide Chat Messages", server_disabled); render_selected_item_text = feature_has("Render Selected Item Text", server_disabled); overwrite_calls((void *) Gui_renderChatMessages, (void *) Gui_renderChatMessages_injection); overwrite_calls((void *) Gui_tick, (void *) Gui_tick_injection); overwrite_calls((void *) Inventory_selectSlot, (void *) Inventory_selectSlot_injection); // Sanitize Username patch_address(LoginPacket_read_vtable_addr, (void *) LoginPacket_read_injection); // Fix RakNet::RakString Security Bug overwrite_calls((void *) RakNet_RakString, (void *) RakNet_RakString_injection); // Print Error Message If RakNet Startup Fails overwrite_call((void *) 0x73778, (void *) RakNetInstance_host_RakNet_RakPeer_Startup_injection); // Fix Bug Where RakNetInstance Starts Pinging Potential Servers Before The "Join Game" Screen Is Opened overwrite_calls((void *) RakNetInstance, (void *) RakNetInstance_injection); // Close Current Screen On Death To Prevent Bugs if (feature_has("Close Current Screen On Death", server_disabled)) { patch_address(LocalPlayer_die_vtable_addr, (void *) LocalPlayer_die_injection); } // Fix Furnace Not Checking Item Auxiliary When Inserting New Item if (feature_has("Fix Furnace Not Checking Item Auxiliary", server_disabled)) { overwrite_calls((void *) FurnaceScreen_handleAddItem, (void *) FurnaceScreen_handleAddItem_injection); } // Improved Cursor Rendering if (feature_has("Improved Cursor Rendering", server_disabled)) { // Disable Normal Cursor Rendering unsigned char disable_cursor_patch[4] = {0x00, 0xf0, 0x20, 0xe3}; // "nop" patch((void *) 0x4a6c0, disable_cursor_patch); // Add Custom Cursor Rendering overwrite_calls((void *) GameRenderer_render, (void *) GameRenderer_render_injection); } // Disable V-Sync if (feature_has("Disable V-Sync", server_disabled)) { media_disable_vsync(); } // Init C++ And Logging _init_misc_cpp(); _init_misc_logging(); }