275 lines
9.8 KiB
C
275 lines
9.8 KiB
C
#include <stdint.h>
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#include <stdio.h>
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#include <libcore/libcore.h>
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#include "extra.h"
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#include "server/server.h"
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static int mob_spawning = 0;
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static uint32_t LevelData_getSpawnMobs_injection(__attribute__((unused)) int32_t obj) {
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return mob_spawning;
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}
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static int is_right_click = 0;
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void extra_set_is_right_click(int val) {
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is_right_click = val;
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}
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typedef void (*releaseUsingItem_t)(unsigned char *game_mode, unsigned char *player);
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typedef void (*Minecraft_tickInput_t)(unsigned char *minecraft, uint32_t param_1);
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static Minecraft_tickInput_t Minecraft_tickInput = (Minecraft_tickInput_t) 0x15ffc;
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static void *Minecraft_tickInput_original = NULL;
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typedef int (*Player_isUsingItem_t)(unsigned char *player);
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static Player_isUsingItem_t Player_isUsingItem = (Player_isUsingItem_t) 0x8f15c;
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static void Minecraft_tickInput_injection(unsigned char *minecraft, uint32_t param_1) {
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// Call Original Method
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revert_overwrite((void *) Minecraft_tickInput, Minecraft_tickInput_original);
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(*Minecraft_tickInput)(minecraft, param_1);
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revert_overwrite((void *) Minecraft_tickInput, Minecraft_tickInput_original);
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// GameMode Is Offset From param_1 By 0x160
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// Player Is Offset From param_1 By 0x18c
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if (!is_right_click) {
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unsigned char *game_mode = *(unsigned char **) (minecraft + 0x160);
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unsigned char *player = *(unsigned char **) (minecraft + 0x18c);
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if (player != NULL && game_mode != NULL && (*Player_isUsingItem)(player)) {
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unsigned char *game_mode_vtable = *(unsigned char **) game_mode;
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releaseUsingItem_t releaseUsingItem = *(releaseUsingItem_t *) (game_mode_vtable + 0x5c);
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(*releaseUsingItem)(game_mode, player);
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}
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}
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extra_clear_input();
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}
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typedef void (*Gui_tickItemDrop_t)(unsigned char *);
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static Gui_tickItemDrop_t Gui_tickItemDrop = (Gui_tickItemDrop_t) 0x27778;
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static void *Gui_tickItemDrop_original = NULL;
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#include <SDL/SDL_events.h>
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static void Gui_tickItemDrop_injection(unsigned char *this) {
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if (SDL_ShowCursor(SDL_QUERY) == SDL_ENABLE) {
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revert_overwrite((void *) Gui_tickItemDrop, Gui_tickItemDrop_original);
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(*Gui_tickItemDrop)(this);
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revert_overwrite((void *) Gui_tickItemDrop, Gui_tickItemDrop_original);
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}
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}
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typedef void (*Gui_handleClick_t)(unsigned char *, unsigned char *, unsigned char *, unsigned char *);
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static Gui_handleClick_t Gui_handleClick = (Gui_handleClick_t) 0x2599c;
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static void *Gui_handleClick_original = NULL;
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static void Gui_handleClick_injection(unsigned char *this, unsigned char *param_2, unsigned char *param_3, unsigned char *param_4) {
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if (SDL_ShowCursor(SDL_QUERY) == SDL_ENABLE) {
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revert_overwrite((void *) Gui_handleClick, Gui_handleClick_original);
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(*Gui_handleClick)(this, param_2, param_3, param_4);
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revert_overwrite((void *) Gui_handleClick, Gui_handleClick_original);
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}
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}
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static int is_survival = -1;
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static void *Creator = (void *) 0x1a044;
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static void *SurvivalMode = (void *) 0x1b7d8;
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static void *CreativeMode = (void *) 0x1b258;
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// Patch Game Mode
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static void set_is_survival(int new_is_survival) {
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if (is_survival != new_is_survival) {
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fprintf(stderr, "Setting Game Mode: %s\n", new_is_survival ? "Survival" : "Creative");
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// Correct Inventpry UI
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unsigned char inventory_patch[4] = {new_is_survival ? 0x00 : 0x01, 0x30, 0xa0, 0xe3};
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patch((void *) 0x16efc, inventory_patch);
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// Use Correct Size For GameMode Object
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unsigned char size_patch[4] = {new_is_survival ? 0x24 : 0x18, 0x00, 0xa0, 0xe3};
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patch((void *) 0x16ee4, size_patch);
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// Replace Creator Constructor With CreatorMode Or SurvivalMode Constructor
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overwrite(Creator, new_is_survival ? SurvivalMode : CreativeMode);
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is_survival = new_is_survival;
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}
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}
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typedef void (*Minecraft_setIsCreativeMode_t)(unsigned char *, int32_t);
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static Minecraft_setIsCreativeMode_t Minecraft_setIsCreativeMode = (Minecraft_setIsCreativeMode_t) 0x16ec4;
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static void *Minecraft_setIsCreativeMode_original = NULL;
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static void Minecraft_setIsCreativeMode_injection(unsigned char *this, int32_t new_game_mode) {
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set_is_survival(!new_game_mode);
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revert_overwrite((void *) Minecraft_setIsCreativeMode, Minecraft_setIsCreativeMode_original);
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(*Minecraft_setIsCreativeMode)(this, new_game_mode);
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revert_overwrite((void *) Minecraft_setIsCreativeMode, Minecraft_setIsCreativeMode_original);
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}
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static char *get_username() {
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char *username = getenv("MCPI_USERNAME");
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if (username == NULL) {
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username = "StevePi";
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}
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return username;
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}
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typedef void (*Minecraft_init_t)(unsigned char *);
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static Minecraft_init_t Minecraft_init = (Minecraft_init_t) 0x1700c;
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static void *Minecraft_init_original = NULL;
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static void Minecraft_init_injection(unsigned char *this) {
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revert_overwrite((void *) Minecraft_init, Minecraft_init_original);
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(*Minecraft_init)(this);
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revert_overwrite((void *) Minecraft_init, Minecraft_init_original);
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// Enable Fancy Graphics
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*(this + 83) = 1;
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}
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// Is Dedicated Server
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static int is_server = 0;
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// Check For Feature
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int extra_has_feature(const char *name) {
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if (is_server) {
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// Enable All Features In Server
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return 1;
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} else {
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char *env = getenv("MCPI_FEATURES");
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char *features = strdup(env != NULL ? env : "");
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char *tok = strtok(features, "|");
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int ret = 0;
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while (tok != NULL) {
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if (strcmp(tok, name) == 0) {
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ret = 1;
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break;
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}
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tok = strtok(NULL, "|");
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}
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free(features);
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fprintf(stderr, "Feature: %s: %s\n", name, ret ? "Enabled" : "Disabled");
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return ret;
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}
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}
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int extra_get_mode() {
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char *mode = getenv("MCPI_MODE");
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if (mode == NULL) {
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ERR("%s", "MCPI Mode Not Specified");
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} else if (strcmp("virgl", mode) == 0) {
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return 0;
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} else if (strcmp("native", mode) == 0) {
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return 1;
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} else if (strcmp("server", mode) == 0) {
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return 2;
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} else {
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ERR("Inavlid MCPI_MODE: %s", mode);
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}
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}
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__attribute__((constructor)) static void init() {
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is_server = extra_get_mode() == 2;
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if (is_server) {
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server_init();
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}
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if (extra_has_feature("Touch GUI")) {
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// Use Touch UI
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unsigned char touch_gui_patch[4] = {0x01, 0x00, 0x50, 0xe3};
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patch((void *) 0x292fc, touch_gui_patch);
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}
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// Dyanmic Game Mode Switching
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set_is_survival(1);
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Minecraft_setIsCreativeMode_original = overwrite((void *) Minecraft_setIsCreativeMode, Minecraft_setIsCreativeMode_injection);
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// Get Default Game Mode
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if (!is_server) {
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int default_game_mode = !extra_has_feature("Survival Mode");
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// Set Default Game Mode
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unsigned char default_game_mode_patch[4] = {default_game_mode ? 0x01 : 0x00, 0x30, 0xa0, 0xe3};
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patch((void *) 0x3d9b8, default_game_mode_patch);
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patch((void *) 0x38a78, default_game_mode_patch);
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}
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// Disable Item Dropping Using The Cursor When Cursor Is Hidden
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Gui_tickItemDrop_original = overwrite((void *) Gui_tickItemDrop, Gui_tickItemDrop_injection);
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// Disable Opening Inventory Using The Cursor When Cursor Is Hidden
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Gui_handleClick_original = overwrite((void *) Gui_handleClick, Gui_handleClick_injection);
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if (extra_has_feature("Fix Bow & Arrow")) {
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// Fix Bow
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Minecraft_tickInput_original = overwrite((void *) Minecraft_tickInput, Minecraft_tickInput_injection);
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}
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if (extra_has_feature("Fix Attacking")) {
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// Allow Attacking Mobs
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unsigned char attacking_patch[4] = {0x00, 0xf0, 0x20, 0xe3};
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patch((void *) 0x162d4, attacking_patch);
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// Fix Instamining When Using This Patch
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unsigned char instamine_patch[4] = {0x61, 0x00, 0x00, 0xea};
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patch((void *) 0x15b0c, instamine_patch);
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// Fix Excessive Hand Swinging When Using This Patch
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unsigned char excessive_swing_patch[4] = {0x06, 0x00, 0x00, 0xea};
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patch((void *) 0x1593c, excessive_swing_patch);
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}
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if (is_server) {
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mob_spawning = server_get_mob_spawning();
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} else {
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mob_spawning = extra_has_feature("Mob Spawning");
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}
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// Set Mob Spawning
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overwrite((void *) 0xbabec, LevelData_getSpawnMobs_injection);
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// Replace CreatorLevel With ServerLevel (This Fixes Beds And Mob Spawning)
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unsigned char patch_data_4[4] = {0x68, 0x7e, 0x01, 0xeb};
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patch((void *) 0x16f84, patch_data_4);
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// Allocate Correct Size For ServerLevel
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unsigned char patch_data_5[4] = {0x94, 0x0b, 0x00, 0x00};
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patch((void *) 0x17004, patch_data_5);
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if (extra_has_feature("Fancy Graphics")) {
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// Enable Fancy Graphics
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Minecraft_init_original = overwrite((void *) Minecraft_init, Minecraft_init_injection);
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}
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// Allow Connecting To Non-Pi Servers
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unsigned char patch_data_9[4] = {0x0f, 0x00, 0x00, 0xea};
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patch((void *) 0x6dc70, patch_data_9);
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// Change Username
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const char *username;
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if (is_server) {
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// MOTD is Username
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username = server_get_motd();
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} else {
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username = get_username();
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fprintf(stderr, "Setting Username: %s\n", username);
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}
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char **default_username = (char **) 0x18fd4;
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if (strcmp(*default_username, "StevePi") != 0) {
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ERR("%s", "Default Username Is Invalid");
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}
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patch_address((void *) default_username, (void *) username);
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if (extra_has_feature("Disable Autojump By Default")) {
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// Disable Autojump By Default
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unsigned char autojump_patch[4] = {0x00, 0x30, 0xa0, 0xe3};
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patch((void *) 0x44b90, autojump_patch);
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}
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if (extra_has_feature("Show Block Outlines")) {
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// Show Block Outlines
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unsigned char outline_patch[4] = {0x00, 0xf0, 0x20, 0xe3};
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patch((void *) 0x4a214, outline_patch);
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}
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}
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