Make "kill" Admin Command Print Death Message

VERSION

@@ -1 +1 @@
-2.0.2
+2.0.3

docs/CHANGELOG.md

@@ -1,5 +1,8 @@
 # Changelog
 
+**2.0.3**
+* Make "kill" Admin Command Print Death Message
+
 **2.0.2**
 * Fix Mouse Cursor Bugs
 

libreborn/include/libreborn/minecraft.h

@@ -197,6 +197,7 @@ static uint32_t Entity_die_vtable_offset = 0x130;
 
 typedef void (*Mob_actuallyHurt_t)(unsigned char *entity, int32_t damage);
 static Mob_actuallyHurt_t Mob_actuallyHurt = (Mob_actuallyHurt_t) 0x7f11c;
+static uint32_t Mob_actuallyHurt_vtable_offset = 0x16c;
 
 static uint32_t Mob_health_property_offset = 0xec; // int32_t
 

mods/CMakeLists.txt

@@ -29,8 +29,11 @@ target_link_libraries(game_mode reborn)
 add_library(input SHARED src/input/input.c src/input/input.cpp)
 target_link_libraries(input reborn feature media-layer-core chat)
 
+add_library(death SHARED src/death/death.cpp)
+target_link_libraries(death reborn)
+
 add_library(misc SHARED src/misc/misc.c src/misc/misc.cpp)
-target_link_libraries(misc reborn feature util)
+target_link_libraries(misc reborn feature)
 
 add_library(options SHARED src/options/options.c)
 target_link_libraries(options reborn feature)
@@ -54,13 +57,13 @@ add_library(test SHARED src/test/test.c)
 target_link_libraries(test reborn home)
 
 add_library(init SHARED src/init/init.c)
-target_link_libraries(init compat game_mode camera input misc options touch textures chat home test)
+target_link_libraries(init compat game_mode camera input misc death options touch textures chat home test)
 if(MCPI_SERVER_MODE)
     target_link_libraries(init server)
 endif()
 
 ## Install Mods
-install(TARGETS init compat readdir feature override game_mode camera input misc options touch textures chat home test DESTINATION "${MCPI_INSTALL_DIR}/mods")
+install(TARGETS init compat readdir feature override game_mode camera input misc death options touch textures chat home test DESTINATION "${MCPI_INSTALL_DIR}/mods")
 if(MCPI_SERVER_MODE)
     install(TARGETS server DESTINATION "${MCPI_INSTALL_DIR}/mods")
 endif()

mods/src/death/death.cpp

@@ -0,0 +1,66 @@
+#include <string>
+
+#include <libreborn/libreborn.h>
+#include <libreborn/minecraft.h>
+
+#include "../init/init.h"
+
+// Death Messages
+static std::string get_death_message(unsigned char *player) {
+    // Get Username
+    char *username = *(char **) (player + Player_username_property_offset);
+
+    // Prepare Death Message
+    std::string message;
+    message.append(username);
+    message.append(" has died");
+
+    // Return
+    return message;
+}
+
+// Common Death Message Logic
+static void Player_actuallyHurt_injection_helper(unsigned char *player, int32_t damage, bool is_local_player) {
+    // Store Old Health
+    int32_t old_health = *(int32_t *) (player + Mob_health_property_offset);
+
+    // Call Original Method
+    (*(is_local_player ? LocalPlayer_actuallyHurt : Mob_actuallyHurt))(player, damage);
+
+    // Store New Health
+    int32_t new_health = *(int32_t *) (player + Mob_health_property_offset);
+
+    // Get Variables
+    unsigned char *minecraft = *(unsigned char **) (player + (is_local_player ? LocalPlayer_minecraft_property_offset : ServerPlayer_minecraft_property_offset));
+    unsigned char *rak_net_instance = *(unsigned char **) (minecraft + Minecraft_rak_net_instance_property_offset);
+    unsigned char *rak_net_instance_vtable = *(unsigned char **) rak_net_instance;
+    // Only Run On Server-Side
+    RakNetInstance_isServer_t RakNetInstance_isServer = *(RakNetInstance_isServer_t *) (rak_net_instance_vtable + RakNetInstance_isServer_vtable_offset);
+    if ((*RakNetInstance_isServer)(rak_net_instance)) {
+        // Check Health
+        if (new_health < 1 && old_health >= 1) {
+            // Get Death Message
+            std::string message = get_death_message(player);
+
+            // Post Death Message
+            unsigned char *server_side_network_handler = *(unsigned char **) (minecraft + Minecraft_network_handler_property_offset);
+            (*ServerSideNetworkHandler_displayGameMessage)(server_side_network_handler, message);
+        }
+    }
+}
+
+// ServerPlayer Death Message Logic
+static void ServerPlayer_actuallyHurt_injection(unsigned char *player, int32_t damage) {
+    Player_actuallyHurt_injection_helper(player, damage, false);
+}
+// LocalPlayer Death Message Logic
+static void LocalPlayer_actuallyHurt_injection(unsigned char *player, int32_t damage) {
+    Player_actuallyHurt_injection_helper(player, damage, true);
+}
+
+// Init
+void init_death() {
+    // Death Messages
+    patch_address(ServerPlayer_actuallyHurt_vtable_addr, (void *) ServerPlayer_actuallyHurt_injection);
+    patch_address(LocalPlayer_actuallyHurt_vtable_addr, (void *) LocalPlayer_actuallyHurt_injection);
+}

mods/src/init/init.c

@@ -9,6 +9,7 @@ __attribute__((constructor)) static void init() {
     init_game_mode();
     init_input();
     init_misc();
+    init_death();
     init_camera();
     init_options();
     init_touch();

mods/src/init/init.h

@@ -12,6 +12,7 @@ void init_server();
 void init_game_mode();
 void init_input();
 void init_misc();
+void init_death();
 void init_camera();
 void init_options();
 void init_touch();

mods/src/misc/misc.c

@@ -64,6 +64,7 @@ static void LoginPacket_read_injection(unsigned char *packet, unsigned char *bit
     free(new_username);
 }
 
+// Init
 void init_misc() {
     if (feature_has("Remove Invalid Item Background")) {
         // Remove Invalid Item Background (A Red Background That Appears For Items That Are Not Included In The gui_blocks Atlas)

mods/src/misc/misc.cpp

@@ -98,57 +98,7 @@ static void Gui_addMessage_injection(unsigned char *gui, std::string const& text
     free(new_message);
 }
 
-// Death Messages
+// Init
-static std::string get_death_message(unsigned char *player) {
-    // Get Username
-    char *username = *(char **) (player + Player_username_property_offset);
-
-    // Prepare Death Message
-    std::string message;
-    message.append(username);
-    message.append(" has died");
-
-    // Return
-    return message;
-}
-// Common Death Message Logic
-static void Player_actuallyHurt_injection_helper(unsigned char *player, int32_t damage, bool is_local_player) {
-    // Store Old Health
-    int32_t old_health = *(int32_t *) (player + Mob_health_property_offset);
-
-    // Call Original Method
-    (*(is_local_player ? LocalPlayer_actuallyHurt : Mob_actuallyHurt))(player, damage);
-
-    // Store New Health
-    int32_t new_health = *(int32_t *) (player + Mob_health_property_offset);
-
-    // Get Variables
-    unsigned char *minecraft = *(unsigned char **) (player + (is_local_player ? LocalPlayer_minecraft_property_offset : ServerPlayer_minecraft_property_offset));
-    unsigned char *rak_net_instance = *(unsigned char **) (minecraft + Minecraft_rak_net_instance_property_offset);
-    unsigned char *rak_net_instance_vtable = *(unsigned char **) rak_net_instance;
-    // Only Run On Server-Side
-    RakNetInstance_isServer_t RakNetInstance_isServer = *(RakNetInstance_isServer_t *) (rak_net_instance_vtable + RakNetInstance_isServer_vtable_offset);
-    if ((*RakNetInstance_isServer)(rak_net_instance)) {
-        // Check Health
-        if (new_health < 1 && old_health >= 1) {
-            // Get Death Message
-            std::string message = get_death_message(player);
-
-            // Post Death Message
-            unsigned char *server_side_network_handler = *(unsigned char **) (minecraft + Minecraft_network_handler_property_offset);
-            (*ServerSideNetworkHandler_displayGameMessage)(server_side_network_handler, message);
-        }
-    }
-}
-// ServerPlayer Death Message Logic
-static void ServerPlayer_actuallyHurt_injection(unsigned char *player, int32_t damage) {
-    Player_actuallyHurt_injection_helper(player, damage, false);
-}
-// LocalPlayer Death Message Logic
-static void LocalPlayer_actuallyHurt_injection(unsigned char *player, int32_t damage) {
-    Player_actuallyHurt_injection_helper(player, damage, true);
-}
-
 void _init_misc_cpp() {
     // Implement AppPlatform::readAssetFile So Translations Work
     overwrite((void *) AppPlatform_readAssetFile, (void *) AppPlatform_readAssetFile_injection);
@@ -160,8 +110,4 @@ void _init_misc_cpp() {
 
     // Print Chat To Log
     overwrite_calls((void *) Gui_addMessage, (void *) Gui_addMessage_injection);
-
-    // Death Messages
-    patch_address(ServerPlayer_actuallyHurt_vtable_addr, (void *) ServerPlayer_actuallyHurt_injection);
-    patch_address(LocalPlayer_actuallyHurt_vtable_addr, (void *) LocalPlayer_actuallyHurt_injection);
 }

mods/src/server/server.cpp

@@ -229,8 +229,8 @@ static void ban_callback(unsigned char *minecraft, std::string username, unsigne
 // Kill Player
 static void kill_callback(__attribute__((unused)) unsigned char *minecraft, __attribute__((unused)) std::string username, unsigned char *player) {
     unsigned char *player_vtable = *(unsigned char **) player;
-    Entity_die_t Entity_die = *(Entity_die_t *) (player_vtable + Entity_die_vtable_offset);
+    Mob_actuallyHurt_t Mob_actuallyHurt = *(Mob_actuallyHurt_t *) (player_vtable + Mob_actuallyHurt_vtable_offset);
-    (*Entity_die)(player, NULL);
+    (*Mob_actuallyHurt)(player, INT32_MAX);
     INFO("Killed: %s", username.c_str());
 }