Add Atmosphere settings manager and release checker

- System settings screen (R button) for toggling verified
  system_settings.ini overrides (DNS MITM, telemetry, cheats,
  debug mode, bluetooth DB). All settings sourced from Atmosphere's
  settings_sd_kvs.cpp -- safe for sysnand online play.
- Release checker screen (X from settings) fetches latest Atmosphere
  release from GitHub on a background thread, shows current vs latest
  version, and displays scrollable release notes.
- Updated build to link libcurl, jansson, mbedtls for HTTPS/JSON.
- Updated CI workflow to install new dependencies.
- Bump version to 1.0.1.

Author: hexbyt3

.github/workflows/build-release.yml

@@ -18,6 +18,10 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
 
+      - name: Install dependencies
+        run: |
+          dkp-pacman -Sy --noconfirm switch-curl switch-jansson switch-mbedtls switch-zlib
+
       - name: Build
         run: make
 

Makefile

@@ -18,7 +18,7 @@ ROMFS		:=	romfs
 
 APP_TITLE	:=	AetherBlock
 APP_AUTHOR	:=	HeXbyt3
-APP_VERSION	:=	1.0.0
+APP_VERSION	:=	1.0.1
 
 #---------------------------------------------------------------------------------
 ARCH	:=	-march=armv8-a+crc+crypto -mtune=cortex-a57 -mtp=soft -fPIE
@@ -27,13 +27,14 @@ CFLAGS	:=	-g -Wall -Wextra -Wno-unused-parameter -O2 -ffunction-sections \
 			$(ARCH) $(DEFINES)
 
 CFLAGS	+=	$(INCLUDE) -D__SWITCH__ \
-			$(shell $(DEVKITPRO)/portlibs/switch/bin/aarch64-none-elf-pkg-config --cflags SDL2_ttf)
+			$(shell $(DEVKITPRO)/portlibs/switch/bin/aarch64-none-elf-pkg-config --cflags SDL2_ttf libcurl jansson)
 
 CXXFLAGS	:=	$(CFLAGS) -fno-rtti -fno-exceptions
 ASFLAGS		:=	-g $(ARCH)
 LDFLAGS		=	-specs=$(DEVKITPRO)/libnx/switch.specs -g $(ARCH) -Wl,-Map,$(notdir $*.map)
 
-LIBS	:=	$(shell $(DEVKITPRO)/portlibs/switch/bin/aarch64-none-elf-pkg-config --libs SDL2_ttf) -lnx
+LIBS	:=	$(shell $(DEVKITPRO)/portlibs/switch/bin/aarch64-none-elf-pkg-config --libs SDL2_ttf) \
+			-lcurl -ljansson -lmbedtls -lmbedx509 -lmbedcrypto -lz -lnx
 
 #---------------------------------------------------------------------------------
 LIBDIRS	:=	$(PORTLIBS) $(LIBNX)

README.md

@@ -37,16 +37,27 @@
 
 ## Features
 
-- Changes take effect immediately via Atmosphere's IPC reload (no reboot)
+### DNS Hosts Manager
+- Toggle Nintendo server blocks on/off with changes applied immediately (no reboot)
 - Entries grouped by category: Telemetry, System Updates, Game Content, eShop
-- Color-coded status indicators (red/green)
-- Atomic file writes (tmp + rename) to prevent corruption
-- Auto-detects which hosts file to use (emummc > sysmmc > default)
-- Confirmation dialog if you try to quit with unsaved changes
-- Quick-apply profiles: block all, allow game updates, telemetry only, allow all
+- Quick-apply profiles: Block All, Allow Game Updates, Telemetry Only, Allow All
 - Built-in connectivity test that TCP pings each host on port 443
-- Toast notifications for save/reload/error feedback
-- Scrollbar, alternating row colors, rounded UI elements
+- Auto-detects which hosts file to use (emummc > sysmmc > default)
+- Atomic file writes to prevent corruption
+
+### Atmosphere Settings Manager
+- Toggle verified `system_settings.ini` overrides from a UI (reboot required to apply)
+- All settings sourced from Atmosphere's `settings_sd_kvs.cpp` -- nothing unverified
+- Categories: Network (DNS MITM controls), Telemetry (error uploads), Homebrew (cheats, debug mode, bluetooth DB)
+- Preserves existing comments and manual edits in your INI file
+- Safe for sysnand online play -- all overrides are local only
+
+### Atmosphere Release Checker
+- Fetches the latest Atmosphere release from GitHub in a background thread
+- Shows your current firmware and Atmosphere versions side by side
+- Compares against the latest release and tells you if an update is available
+- Extracts supported firmware version from release notes
+- Scrollable release notes viewer
 
 ## Controls
 
@@ -58,9 +69,14 @@
 | X | Open profiles menu |
 | Y | Save & reload DNS |
 | L | Run server connectivity test |
+| R | Atmosphere settings |
 | - | Seed default Nintendo entries |
 | + | Quit (with unsaved changes check) |
 
+**Settings Screen:** A Toggle | Y Save | X Release Checker | B Back
+
+**Release Checker:** A Refresh | B Back | Up/Down scroll notes
+
 ## Installation
 
 1. Download `AetherBlock.nro` from the [latest release](https://github.com/hexbyt3/AetherBlock/releases/latest)
@@ -69,26 +85,27 @@
 
 ## Building
 
-Requires [devkitPro](https://devkitpro.org/) with `switch-dev`, `switch-sdl2`, `switch-sdl2_ttf`, and `switch-freetype`.
+Requires [devkitPro](https://devkitpro.org/) with the following packages:
 
 ```bash
-(dkp-)pacman -S switch-dev switch-sdl2 switch-sdl2_ttf switch-freetype
+(dkp-)pacman -S switch-dev switch-sdl2 switch-sdl2_ttf switch-freetype switch-curl switch-jansson switch-mbedtls switch-zlib
 make
 ```
 
 ## How It Works
 
-AetherBlock reads and modifies Atmosphere's hosts file at `/atmosphere/hosts/default.txt`. Entries prefixed with `;` are disabled. Active entries redirect hostnames to `127.0.0.1`.
+**DNS Hosts:** Reads and modifies Atmosphere's hosts file at `/atmosphere/hosts/default.txt`. Entries prefixed with `;` are disabled. After saving, it calls Atmosphere's IPC command 65000 on `sfdnsres` to reload the hosts file in memory -- no reboot needed.
 
-After saving, it calls Atmosphere's IPC command 65000 on `sfdnsres` to reload the hosts file in memory.
+**System Settings:** Reads and modifies `/atmosphere/config/system_settings.ini`. Atmosphere parses this file at boot and overrides the corresponding system settings via its set:sys mitm service. Changes here require a reboot to take effect.
 
-The connectivity test does non-blocking TCP connects on port 443, one host per frame so the UI stays responsive.
+**Release Checker:** Hits the GitHub API (`/repos/Atmosphere-NX/Atmosphere/releases/latest`) on a background thread and parses the JSON response with jansson. Reads local Atmosphere version via `splGetConfig` with config item 65000.
 
 ## Credits
 
 - DNS reload mechanism via [DNS-MITM_Manager](https://github.com/znxDomain/DNS-MITM_Manager) by znxDomain
 - Server list from [NintendoClients Wiki](https://github.com/kinnay/NintendoClients/wiki/Server-List)
-- Built with [libnx](https://github.com/switchbrew/libnx) and [SDL2](https://www.libsdl.org/)
+- Settings verified against [Atmosphere](https://github.com/Atmosphere-NX/Atmosphere) source (`settings_sd_kvs.cpp`)
+- Built with [libnx](https://github.com/switchbrew/libnx), [SDL2](https://www.libsdl.org/), [libcurl](https://curl.se/libcurl/), and [jansson](https://github.com/akheron/jansson)
 
 ## License
 

include/config.h

@@ -2,7 +2,7 @@
 #define CONFIG_H
 
 #define APP_NAME            "AetherBlock"
-#define APP_VERSION         "1.0.0"
+#define APP_VERSION         "1.0.1"
 #define APP_AUTHOR          "HeXbyt3"
 
 #define HOSTS_MAX_ENTRIES   256

include/release_checker.h

@@ -0,0 +1,50 @@
+#ifndef RELEASE_CHECKER_H
+#define RELEASE_CHECKER_H
+
+#include <switch.h>
+#include <stdbool.h>
+
+#define GITHUB_API_URL  "https://api.github.com/repos/Atmosphere-NX/Atmosphere/releases/latest"
+#define RELEASE_TAG_MAX     32
+#define RELEASE_NAME_MAX    128
+#define RELEASE_FW_MAX      32
+#define RELEASE_BODY_MAX    4096
+#define RELEASE_DATE_MAX    32
+
+typedef enum {
+    RELEASE_IDLE = 0,
+    RELEASE_FETCHING,
+    RELEASE_SUCCESS,
+    RELEASE_ERROR,
+} ReleaseCheckState;
+
+typedef struct {
+    /* local system info */
+    int fw_major, fw_minor, fw_micro;
+    int ams_major, ams_minor, ams_micro;
+    bool ams_detected;
+
+    /* latest release from GitHub */
+    char tag_name[RELEASE_TAG_MAX];
+    char release_name[RELEASE_NAME_MAX];
+    char supported_fw[RELEASE_FW_MAX];
+    char body[RELEASE_BODY_MAX];
+    char published_date[RELEASE_DATE_MAX];
+    int  latest_major, latest_minor, latest_micro;
+
+    /* state */
+    ReleaseCheckState state;
+    char error_msg[256];
+    bool update_available;
+
+    /* background thread */
+    Thread fetch_thread;
+    bool   thread_running;
+} ReleaseInfo;
+
+void releaseInit(ReleaseInfo *ri);
+void releaseReadLocal(ReleaseInfo *ri);
+void releaseFetchAsync(ReleaseInfo *ri);
+bool releaseFetchDone(ReleaseInfo *ri);
+
+#endif

include/sys_settings.h

@@ -0,0 +1,50 @@
+#ifndef SYS_SETTINGS_H
+#define SYS_SETTINGS_H
+
+#include <switch.h>
+#include <stdbool.h>
+
+#define SYS_SETTINGS_PATH       "/atmosphere/config/system_settings.ini"
+#define SYS_SETTINGS_MAX_LINE   512
+#define SYS_SETTINGS_MAX_LINES  512
+
+typedef enum {
+    SETTING_CAT_NETWORK = 0,
+    SETTING_CAT_TELEMETRY,
+    SETTING_CAT_HOMEBREW,
+    SETTING_CAT_COUNT,
+} SettingCategory;
+
+typedef struct {
+    const char *section;
+    const char *key;
+    const char *type;
+    const char *on_val;        /* value when toggle is ON */
+    const char *off_val;       /* value when toggle is OFF */
+    const char *display_name;
+    const char *description;
+    SettingCategory category;
+    bool toggled_on;           /* current state: true = on_val written */
+    bool found_in_file;
+    bool is_default_on;        /* what Atmosphere defaults to */
+} SysSettingDef;
+
+typedef struct {
+    char lines[SYS_SETTINGS_MAX_LINES][SYS_SETTINGS_MAX_LINE];
+    int  line_count;
+    bool dirty;
+    bool file_existed;
+} SysSettingsFile;
+
+#define SYS_SETTING_COUNT 9
+
+extern SysSettingDef g_sys_setting_defs[SYS_SETTING_COUNT];
+
+const char *settingCategoryName(SettingCategory cat);
+
+Result sysSettingsLoad(SysSettingsFile *sf);
+Result sysSettingsSave(SysSettingsFile *sf);
+void   sysSettingsReadStates(SysSettingsFile *sf);
+void   sysSettingsToggle(SysSettingsFile *sf, int index);
+
+#endif

include/ui.h

@@ -8,13 +8,17 @@
 #include "hosts_parser.h"
 #include "profiles.h"
 #include "net_test.h"
+#include "sys_settings.h"
+#include "release_checker.h"
 
 typedef enum {
     SCREEN_MAIN_LIST = 0,
     SCREEN_PROFILES,
     SCREEN_CONFIRM,
     SCREEN_STATUS,
     SCREEN_NET_TEST,
+    SCREEN_SYS_SETTINGS,
+    SCREEN_RELEASE_CHECK,
 } AppScreen;
 
 typedef struct {
@@ -38,6 +42,12 @@ typedef struct {
 
     NetTestState  net_test;
     int           net_test_scroll;
+
+    int              sys_settings_cursor;
+    SysSettingsFile *sys_settings_file;
+
+    ReleaseInfo   release_info;
+    int           release_scroll;
 } UIState;
 
 bool uiInit(UIState *ui);