210 lines
7.7 KiB
C
210 lines
7.7 KiB
C
#include <stdint.h>
|
|
#include <stdio.h>
|
|
#include <SDL/SDL_mouse.h>
|
|
|
|
#include <libcore/libcore.h>
|
|
|
|
#include "extra.h"
|
|
|
|
static uint32_t getSpawnMobs_injection(__attribute__((unused)) int32_t obj) {
|
|
return 1;
|
|
}
|
|
|
|
typedef void (*releaseUsingItem_t)(unsigned char *t, unsigned char *player);
|
|
static releaseUsingItem_t survival_releaseUsingItem = (releaseUsingItem_t) 0x1a598;
|
|
static releaseUsingItem_t creative_releaseUsingItem = (releaseUsingItem_t) 0x1b1a0;
|
|
|
|
typedef void (*handle_input_t)(unsigned char *, unsigned char *, unsigned char *, unsigned char *);
|
|
static handle_input_t handle_input = (handle_input_t) 0x15ffc;
|
|
static void *handle_input_original = NULL;
|
|
|
|
static int is_survival = -1;
|
|
|
|
static void handle_input_injection(unsigned char *param_1, unsigned char *param_2, unsigned char *param_3, unsigned char *param_4) {
|
|
// Call Original Method
|
|
revert_overwrite((void *) handle_input, handle_input_original);
|
|
(*handle_input)(param_1, param_2, param_3, param_4);
|
|
revert_overwrite((void *) handle_input, handle_input_original);
|
|
|
|
// GameMode Is Offset From param_1 By 0x160
|
|
// Player Is Offset From param_1 By 0x18c
|
|
int using_item = SDL_GetMouseState(NULL, NULL) & SDL_BUTTON(SDL_BUTTON_RIGHT);
|
|
if (!using_item) {
|
|
unsigned char *game_mode = *(unsigned char **) (param_1 + 0x160);
|
|
unsigned char *player = *(unsigned char **) (param_1 + 0x18c);
|
|
if (player != NULL && game_mode != NULL) {
|
|
(*(is_survival ? survival_releaseUsingItem : creative_releaseUsingItem))(game_mode, player);
|
|
}
|
|
}
|
|
|
|
clear_input();
|
|
}
|
|
|
|
typedef void (*tickItemDrop_t)(unsigned char *);
|
|
static tickItemDrop_t tickItemDrop = (tickItemDrop_t) 0x27778;
|
|
static void *tickItemDrop_original = NULL;
|
|
|
|
#include <SDL/SDL_events.h>
|
|
|
|
static void tickItemDrop_injection(unsigned char *this) {
|
|
if (SDL_ShowCursor(SDL_QUERY) == SDL_ENABLE) {
|
|
revert_overwrite((void *) tickItemDrop, tickItemDrop_original);
|
|
(*tickItemDrop)(this);
|
|
revert_overwrite((void *) tickItemDrop, tickItemDrop_original);
|
|
}
|
|
}
|
|
|
|
typedef void (*handleClick_t)(unsigned char *, unsigned char *, unsigned char *, unsigned char *);
|
|
static handleClick_t handleClick = (handleClick_t) 0x2599c;
|
|
static void *handleClick_original = NULL;
|
|
|
|
static void handleClick_injection(unsigned char *this, unsigned char *param_2, unsigned char *param_3, unsigned char *param_4) {
|
|
if (SDL_ShowCursor(SDL_QUERY) == SDL_ENABLE) {
|
|
revert_overwrite((void *) handleClick, handleClick_original);
|
|
(*handleClick)(this, param_2, param_3, param_4);
|
|
revert_overwrite((void *) handleClick, handleClick_original);
|
|
}
|
|
}
|
|
|
|
int has_feature(const char *name) {
|
|
char *env = getenv("MCPI_FEATURES");
|
|
char *features = strdup(env != NULL ? env : "");
|
|
char *tok = strtok(features, "|");
|
|
int ret = 0;
|
|
while (tok != NULL) {
|
|
if (strcmp(tok, name) == 0) {
|
|
ret = 1;
|
|
break;
|
|
}
|
|
tok = strtok(NULL, "|");
|
|
}
|
|
free(features);
|
|
fprintf(stderr, "Feature: %s: %s\n", name, ret ? "Enabled" : "Disabled");
|
|
return ret;
|
|
}
|
|
|
|
// Patch Game Mode
|
|
static void set_is_survival(int new_is_survival) {
|
|
if (is_survival != new_is_survival) {
|
|
fprintf(stderr, "Setting Game Mode: %s\n", new_is_survival ? "Survival" : "Creative");
|
|
|
|
// Correct Inventpry UI
|
|
unsigned char inventory_patch[4] = {new_is_survival ? 0x00 : 0x01, 0x30, 0xa0, 0xe3};
|
|
patch((void *) 0x16efc, inventory_patch);
|
|
|
|
// Replace Creative Mode VTable With Correct VTable
|
|
unsigned char creative_vtable_patch[4] = {0x00, 0x2d, 0x10, 0x00};
|
|
unsigned char survival_vtable_patch[4] = {0x60, 0x2f, 0x10, 0x00};
|
|
patch((void *) 0x1a0d8, new_is_survival ? survival_vtable_patch : creative_vtable_patch);
|
|
|
|
// Use Correct Size For Game Mode Object
|
|
unsigned char size_patch[4] = {new_is_survival ? 0x24 : 0x20, 0x00, 0xa0, 0xe3};
|
|
patch((void *) 0x1a054, size_patch);
|
|
|
|
is_survival = new_is_survival;
|
|
}
|
|
}
|
|
|
|
typedef void (*setIsCreativeMode_t)(unsigned char *, int32_t);
|
|
static setIsCreativeMode_t setIsCreativeMode = (setIsCreativeMode_t) 0x16ec4;
|
|
static void *setIsCreativeMode_original = NULL;
|
|
|
|
static void setIsCreativeMode_injection(unsigned char *this, int32_t new_game_mode) {
|
|
set_is_survival(!new_game_mode);
|
|
|
|
revert_overwrite((void *) setIsCreativeMode, setIsCreativeMode_original);
|
|
(*setIsCreativeMode)(this, new_game_mode);
|
|
revert_overwrite((void *) setIsCreativeMode, setIsCreativeMode_original);
|
|
}
|
|
|
|
static char *get_username() {
|
|
char *username = getenv("MCPI_USERNAME");
|
|
if (username == NULL) {
|
|
username = "StevePi";
|
|
}
|
|
return username;
|
|
}
|
|
|
|
typedef void (*minecraft_init_t)(unsigned char *);
|
|
static minecraft_init_t minecraft_init = (minecraft_init_t) 0x1700c;
|
|
static void *minecraft_init_original = NULL;
|
|
|
|
static void minecraft_init_injection(unsigned char *this) {
|
|
revert_overwrite((void *) minecraft_init, minecraft_init_original);
|
|
(*minecraft_init)(this);
|
|
revert_overwrite((void *) minecraft_init, minecraft_init_original);
|
|
|
|
*(this + 83) = 1;
|
|
}
|
|
|
|
__attribute__((constructor)) static void init() {
|
|
if (has_feature("Touch GUI")) {
|
|
// Use Touch UI
|
|
unsigned char touch_gui_patch[4] = {0x01, 0x00, 0x50, 0xe3};
|
|
patch((void *) 0x292fc, touch_gui_patch);
|
|
}
|
|
|
|
// Dyanmic Game Mode Switching
|
|
set_is_survival(0);
|
|
setIsCreativeMode_original = overwrite((void *) setIsCreativeMode, setIsCreativeMode_injection);
|
|
|
|
// Set Default Game Mode
|
|
unsigned char default_game_mode_patch[4] = {has_feature("Survival Mode") ? 0x00 : 0x01, 0x30, 0xa0, 0xe3};
|
|
patch((void *) 0xba744, default_game_mode_patch);
|
|
|
|
// Disable Item Dropping When Cursor Is Hidden
|
|
tickItemDrop_original = overwrite((void *) tickItemDrop, tickItemDrop_injection);
|
|
// Disable Opening Inventory Using The Cursor When Cursor Is Hidden
|
|
handleClick_original = overwrite((void *) handleClick, handleClick_injection);
|
|
|
|
if (has_feature("Fix Bow & Arrow")) {
|
|
// Fix Bow
|
|
handle_input_original = overwrite((void *) handle_input, handle_input_injection);
|
|
}
|
|
|
|
if (has_feature("Fix Attacking")) {
|
|
// Allow Attacking Mobs
|
|
unsigned char attacking_patch[4] = {0x00, 0xf0, 0x20, 0xe3};
|
|
patch((void *) 0x162d4, attacking_patch);
|
|
unsigned char instamine_patch[4] = {0x61, 0x00, 0x00, 0xea};
|
|
patch((void *) 0x15b0c, instamine_patch);
|
|
}
|
|
|
|
if (has_feature("Mob Spawning")) {
|
|
// Enable Mob Spawning
|
|
overwrite((void *) 0xbabec, getSpawnMobs_injection);
|
|
}
|
|
|
|
// Replace CreatorLevel With ServerLevel (This Fixes Beds And Mob Spawning)
|
|
unsigned char patch_data_4[4] = {0x68, 0x7e, 0x01, 0xeb};
|
|
patch((void *) 0x16f84, patch_data_4);
|
|
|
|
// Allocate Correct Size For ServerLevel
|
|
unsigned char patch_data_5[4] = {0x94, 0x0b, 0x00, 0x00};
|
|
patch((void *) 0x17004, patch_data_5);
|
|
|
|
if (has_feature("Fancy Graphics")) {
|
|
// Enable Fancy Graphics
|
|
minecraft_init_original = overwrite((void *) minecraft_init, minecraft_init_injection);
|
|
}
|
|
|
|
// Allow Connecting To Non-Pi Servers
|
|
unsigned char patch_data_9[4] = {0x0f, 0x00, 0x00, 0xea};
|
|
patch((void *) 0x6dc70, patch_data_9);
|
|
|
|
// Change Username
|
|
const char *username = get_username();
|
|
fprintf(stderr, "Setting Username: %s\n", username);
|
|
patch_address((void *) 0x18fd4, (void *) username);
|
|
|
|
if (has_feature("Disable Autojump By Default")) {
|
|
// Disable Autojump By Default
|
|
unsigned char autojump_patch[4] = {0x00, 0x30, 0xa0, 0xe3};
|
|
patch((void *) 0x44b90, autojump_patch);
|
|
}
|
|
|
|
// Fix Segmentation Fault
|
|
unsigned char segfault_patch[4] = {0x03, 0x00, 0x00, 0xea};
|
|
patch((void *) 0x4a630, segfault_patch);
|
|
}
|