add TODO comment

closes #298

.github/workflows/cachix.yml

@@ -7,7 +7,7 @@ jobs:
       matrix:
        os: 
         - ubuntu-latest
-        - macos-13
+        - macos-15-intel
         - macos-14
     name: "Build"
     runs-on: ${{ matrix.os }} 
@@ -31,7 +31,7 @@ jobs:
       run: nix build --print-build-logs --show-trace .#packages.x86_64-linux.lan-mouse
 
     - name: Build lan-mouse (x86_64-darwin)
-      if: matrix.os == 'macos-13'
+      if: matrix.os == 'macos-15-intel'
       run: nix build --print-build-logs --show-trace .#packages.x86_64-darwin.lan-mouse
 
     - name: Build lan-mouse (aarch64-darwin)

.github/workflows/pre-release.yml

@@ -80,7 +80,7 @@ jobs:
         path: lan-mouse-windows.zip
 
   macos-release-build:
-    runs-on: macos-13
+    runs-on: macos-15-intel
     steps:
     - uses: actions/checkout@v4
     - name: install dependencies

.github/workflows/rust.yml

@@ -94,7 +94,7 @@ jobs:
           target/debug/*.dll
 
   build-macos:
-    runs-on: macos-13
+    runs-on: macos-15-intel
     steps:
     - uses: actions/checkout@v4
     - name: install dependencies

.github/workflows/tagged-release.yml

@@ -76,7 +76,7 @@ jobs:
         path: lan-mouse-windows.zip
 
   macos-release-build:
-    runs-on: macos-13
+    runs-on: macos-15-intel
     steps:
     - uses: actions/checkout@v4
     - name: install dependencies

.rustfmt.toml

@@ -0,0 +1,4 @@
+style_edition = "2024"
+
+max_width = 100
+tab_spaces = 4

Cargo.lock

@@ -1872,6 +1872,7 @@ dependencies = [
  "tokio",
  "tokio-util",
  "toml",
+ "toml_edit",
  "webrtc-dtls",
  "webrtc-util",
 ]

Cargo.toml

@@ -38,6 +38,7 @@ shadow-rs = { version = "1.2.0", features = ["metadata"] }
 
 hickory-resolver = "0.25.2"
 toml = "0.8"
+toml_edit = { version = "0.22", features = ["serde"] }
 serde = { version = "1.0", features = ["derive"] }
 log = "0.4.20"
 env_logger = "0.11.3"

README.md

@@ -321,6 +321,9 @@ To do so, use the `daemon` subcommand:
 ```sh
 lan-mouse daemon
 ```
+</details>
+
+## Systemd Service
 
 In order to start lan-mouse with a graphical session automatically,
 the [systemd-service](service/lan-mouse.service) can be used:
@@ -332,7 +335,9 @@ cp service/lan-mouse.service ~/.config/systemd/user
 systemctl --user daemon-reload
 systemctl --user enable --now lan-mouse.service
 ```
-</details>
+> [!Important]
+> Make sure to point `ExecStart=/usr/bin/lan-mouse daemon` to the actual `lan-mouse` binary (in case it is not under `/usr/bin`, e.g. when installed manually.
+
 
 ## Configuration
 To automatically load clients on startup, the file `$XDG_CONFIG_HOME/lan-mouse/config.toml` is parsed.

input-capture/src/dummy.rs

@@ -1,6 +1,6 @@
 use std::f64::consts::PI;
 use std::pin::Pin;
-use std::task::{ready, Context, Poll};
+use std::task::{Context, Poll, ready};
 use std::time::Duration;
 
 use async_trait::async_trait;

input-capture/src/error.rs

@@ -12,9 +12,9 @@ pub enum InputCaptureError {
 use std::io;
 #[cfg(all(unix, feature = "layer_shell", not(target_os = "macos")))]
 use wayland_client::{
+    ConnectError, DispatchError,
     backend::WaylandError,
     globals::{BindError, GlobalError},
-    ConnectError, DispatchError,
 };
 
 #[cfg(all(unix, feature = "libei", not(target_os = "macos")))]

input-capture/src/layer_shell.rs

@@ -7,7 +7,7 @@ use std::{
     io::{self, ErrorKind},
     os::fd::{AsFd, RawFd},
     pin::Pin,
-    task::{ready, Context, Poll},
+    task::{Context, Poll, ready},
 };
 use tokio::io::unix::AsyncFd;
 
@@ -45,9 +45,10 @@ use wayland_protocols_wlr::layer_shell::v1::client::{
 };
 
 use wayland_client::{
+    Connection, Dispatch, DispatchError, EventQueue, QueueHandle, WEnum,
     backend::{ReadEventsGuard, WaylandError},
     delegate_noop,
-    globals::{registry_queue_init, Global, GlobalList, GlobalListContents},
+    globals::{Global, GlobalList, GlobalListContents, registry_queue_init},
     protocol::{
         wl_buffer, wl_compositor,
         wl_keyboard::{self, WlKeyboard},
@@ -58,7 +59,6 @@ use wayland_client::{
         wl_seat, wl_shm, wl_shm_pool,
         wl_surface::WlSurface,
     },
-    Connection, Dispatch, DispatchError, EventQueue, QueueHandle, WEnum,
 };
 
 use input_event::{Event, KeyboardEvent, PointerEvent};
@@ -66,8 +66,8 @@ use input_event::{Event, KeyboardEvent, PointerEvent};
 use crate::{CaptureError, CaptureEvent};
 
 use super::{
-    error::{LayerShellCaptureCreationError, WaylandBindError},
     Capture, Position,
+    error::{LayerShellCaptureCreationError, WaylandBindError},
 };
 
 struct Globals {

input-capture/src/lib.rs

@@ -2,14 +2,14 @@ use std::{
     collections::{HashMap, HashSet, VecDeque},
     fmt::Display,
     mem::swap,
-    task::{ready, Poll},
+    task::{Poll, ready},
 };
 
 use async_trait::async_trait;
 use futures::StreamExt;
 use futures_core::Stream;
 
-use input_event::{scancode, Event, KeyboardEvent};
+use input_event::{Event, KeyboardEvent, scancode};
 
 pub use error::{CaptureCreationError, CaptureError, InputCaptureError};
 

input-capture/src/libei.rs

@@ -1,10 +1,10 @@
 use ashpd::{
     desktop::{
+        Session,
         input_capture::{
             Activated, ActivatedBarrier, Barrier, BarrierID, Capabilities, InputCapture, Region,
             Zones,
         },
-        Session,
     },
     enumflags2::BitFlags,
 };
@@ -28,8 +28,8 @@ use std::{
 };
 use tokio::{
     sync::{
-        mpsc::{self, Receiver, Sender},
         Notify,
+        mpsc::{self, Receiver, Sender},
     },
     task::JoinHandle,
 };
@@ -42,8 +42,8 @@ use input_event::Event;
 use crate::CaptureEvent;
 
 use super::{
-    error::{CaptureError, LibeiCaptureCreationError},
     Capture as LanMouseInputCapture, Position,
+    error::{CaptureError, LibeiCaptureCreationError},
 };
 
 /* there is a bug in xdg-remote-desktop-portal-gnome / mutter that

input-capture/src/macos.rs

@@ -1,31 +1,40 @@
-use super::{error::MacosCaptureCreationError, Capture, CaptureError, CaptureEvent, Position};
+use super::{Capture, CaptureError, CaptureEvent, Position, error::MacosCaptureCreationError};
 use async_trait::async_trait;
 use bitflags::bitflags;
-use core_foundation::base::{kCFAllocatorDefault, CFRelease};
-use core_foundation::date::CFTimeInterval;
-use core_foundation::number::{kCFBooleanTrue, CFBooleanRef};
-use core_foundation::runloop::{kCFRunLoopCommonModes, CFRunLoop, CFRunLoopSource};
-use core_foundation::string::{kCFStringEncodingUTF8, CFStringCreateWithCString, CFStringRef};
-use core_graphics::base::{kCGErrorSuccess, CGError};
-use core_graphics::display::{CGDisplay, CGPoint};
-use core_graphics::event::{
-    CGEvent, CGEventFlags, CGEventTap, CGEventTapLocation, CGEventTapOptions, CGEventTapPlacement,
-    CGEventTapProxy, CGEventType, CallbackResult, EventField,
+use core_foundation::{
+    base::{CFRelease, kCFAllocatorDefault},
+    date::CFTimeInterval,
+    number::{CFBooleanRef, kCFBooleanTrue},
+    runloop::{CFRunLoop, CFRunLoopSource, kCFRunLoopCommonModes},
+    string::{CFStringCreateWithCString, CFStringRef, kCFStringEncodingUTF8},
+};
+use core_graphics::{
+    base::{CGError, kCGErrorSuccess},
+    display::{CGDisplay, CGPoint},
+    event::{
+        CGEvent, CGEventFlags, CGEventTap, CGEventTapLocation, CGEventTapOptions,
+        CGEventTapPlacement, CGEventTapProxy, CGEventType, CallbackResult, EventField,
+    },
+    event_source::{CGEventSource, CGEventSourceStateID},
 };
-use core_graphics::event_source::{CGEventSource, CGEventSourceStateID};
 use futures_core::Stream;
-use input_event::{Event, KeyboardEvent, PointerEvent, BTN_LEFT, BTN_MIDDLE, BTN_RIGHT};
+use input_event::{BTN_LEFT, BTN_MIDDLE, BTN_RIGHT, Event, KeyboardEvent, PointerEvent};
 use keycode::{KeyMap, KeyMapping};
 use libc::c_void;
 use once_cell::unsync::Lazy;
-use std::collections::HashSet;
-use std::ffi::{c_char, CString};
-use std::pin::Pin;
-use std::sync::Arc;
-use std::task::{ready, Context, Poll};
-use std::thread::{self};
-use tokio::sync::mpsc::{self, Receiver, Sender};
-use tokio::sync::{oneshot, Mutex};
+use std::{
+    collections::HashSet,
+    ffi::{CString, c_char},
+    pin::Pin,
+    sync::Arc,
+    task::{Context, Poll, ready},
+    thread::{self},
+};
+use tokio::sync::{
+    Mutex,
+    mpsc::{self, Receiver, Sender},
+    oneshot,
+};
 
 #[derive(Debug, Default)]
 struct Bounds {
@@ -37,9 +46,15 @@ struct Bounds {
 
 #[derive(Debug)]
 struct InputCaptureState {
+    /// active capture positions
     active_clients: Lazy<HashSet<Position>>,
+    /// the currently entered capture position, if any
     current_pos: Option<Position>,
+    /// position where the cursor was captured
+    enter_position: Option<CGPoint>,
+    /// bounds of the input capture area
     bounds: Bounds,
+    /// current state of modifier keys
     modifier_state: XMods,
 }
 
@@ -57,6 +72,7 @@ impl InputCaptureState {
         let mut res = Self {
             active_clients: Lazy::new(HashSet::new),
             current_pos: None,
+            enter_position: None,
             bounds: Bounds::default(),
             modifier_state: Default::default(),
         };
@@ -98,45 +114,34 @@ impl InputCaptureState {
         Ok(())
     }
 
-    // We can't disable mouse movement when in a client so we need to reset the cursor position
-    // to the edge of the screen, the cursor will be hidden but we dont want it to appear in a
-    // random location when we exit the client
-    fn reset_mouse_position(&self, event: &CGEvent) -> Result<(), CaptureError> {
-        if let Some(pos) = self.current_pos {
-            let location = event.location();
-            let edge_offset = 1.0;
+    /// start the input capture by
+    fn start_capture(&mut self, event: &CGEvent, position: Position) -> Result<(), CaptureError> {
+        let mut location = event.location();
+        let edge_offset = 1.0;
+        // move cursor location to display bounds
+        match position {
+            Position::Left => location.x = self.bounds.xmin + edge_offset,
+            Position::Right => location.x = self.bounds.xmax - edge_offset,
+            Position::Top => location.y = self.bounds.ymin + edge_offset,
+            Position::Bottom => location.y = self.bounds.ymax - edge_offset,
+        };
+        self.enter_position = Some(location);
+        self.reset_cursor()
+    }
 
-            // After the cursor is warped no event is produced but the next event
-            // will carry the delta from the warp so only half the delta is needed to move the cursor
-            let delta_y = event.get_double_value_field(EventField::MOUSE_EVENT_DELTA_Y) / 2.0;
-            let delta_x = event.get_double_value_field(EventField::MOUSE_EVENT_DELTA_X) / 2.0;
+    /// resets the cursor to the position, where the capture started
+    fn reset_cursor(&mut self) -> Result<(), CaptureError> {
+        let pos = self.enter_position.expect("capture active");
+        log::trace!("Resetting cursor position to: {}, {}", pos.x, pos.y);
+        CGDisplay::warp_mouse_cursor_position(pos).map_err(CaptureError::WarpCursor)
+    }
 
-            let mut new_x = location.x + delta_x;
-            let mut new_y = location.y + delta_y;
+    fn hide_cursor(&self) -> Result<(), CaptureError> {
+        CGDisplay::hide_cursor(&CGDisplay::main()).map_err(CaptureError::CoreGraphics)
+    }
 
-            match pos {
-                Position::Left => {
-                    new_x = self.bounds.xmin + edge_offset;
-                }
-                Position::Right => {
-                    new_x = self.bounds.xmax - edge_offset;
-                }
-                Position::Top => {
-                    new_y = self.bounds.ymin + edge_offset;
-                }
-                Position::Bottom => {
-                    new_y = self.bounds.ymax - edge_offset;
-                }
-            }
-            let new_pos = CGPoint::new(new_x, new_y);
-
-            log::trace!("Resetting cursor position to: {new_x}, {new_y}");
-
-            return CGDisplay::warp_mouse_cursor_position(new_pos)
-                .map_err(CaptureError::WarpCursor);
-        }
-
-        Err(CaptureError::ResetMouseWithoutClient)
+    fn show_cursor(&self) -> Result<(), CaptureError> {
+        CGDisplay::show_cursor(&CGDisplay::main()).map_err(CaptureError::CoreGraphics)
     }
 
     async fn handle_producer_event(
@@ -147,15 +152,13 @@ impl InputCaptureState {
         match producer_event {
             ProducerEvent::Release => {
                 if self.current_pos.is_some() {
-                    CGDisplay::show_cursor(&CGDisplay::main())
-                        .map_err(CaptureError::CoreGraphics)?;
+                    self.show_cursor()?;
                     self.current_pos = None;
                 }
             }
             ProducerEvent::Grab(pos) => {
                 if self.current_pos.is_none() {
-                    CGDisplay::hide_cursor(&CGDisplay::main())
-                        .map_err(CaptureError::CoreGraphics)?;
+                    self.hide_cursor()?;
                     self.current_pos = Some(pos);
                 }
             }
@@ -165,8 +168,7 @@ impl InputCaptureState {
             ProducerEvent::Destroy(p) => {
                 if let Some(current) = self.current_pos {
                     if current == p {
-                        CGDisplay::show_cursor(&CGDisplay::main())
-                            .map_err(CaptureError::CoreGraphics)?;
+                        self.show_cursor()?;
                         self.current_pos = None;
                     };
                 }
@@ -316,21 +318,47 @@ fn get_events(
             })))
         }
         CGEventType::ScrollWheel => {
-            let v = ev.get_integer_value_field(EventField::SCROLL_WHEEL_EVENT_POINT_DELTA_AXIS_1);
-            let h = ev.get_integer_value_field(EventField::SCROLL_WHEEL_EVENT_POINT_DELTA_AXIS_2);
-            if v != 0 {
-                result.push(CaptureEvent::Input(Event::Pointer(PointerEvent::Axis {
-                    time: 0,
-                    axis: 0, // Vertical
-                    value: v as f64,
-                })));
-            }
-            if h != 0 {
-                result.push(CaptureEvent::Input(Event::Pointer(PointerEvent::Axis {
-                    time: 0,
-                    axis: 1, // Horizontal
-                    value: h as f64,
-                })));
+            if ev.get_integer_value_field(EventField::SCROLL_WHEEL_EVENT_IS_CONTINUOUS) != 0 {
+                let v =
+                    ev.get_integer_value_field(EventField::SCROLL_WHEEL_EVENT_POINT_DELTA_AXIS_1);
+                let h =
+                    ev.get_integer_value_field(EventField::SCROLL_WHEEL_EVENT_POINT_DELTA_AXIS_2);
+                if v != 0 {
+                    result.push(CaptureEvent::Input(Event::Pointer(PointerEvent::Axis {
+                        time: 0,
+                        axis: 0, // Vertical
+                        value: v as f64,
+                    })));
+                }
+                if h != 0 {
+                    result.push(CaptureEvent::Input(Event::Pointer(PointerEvent::Axis {
+                        time: 0,
+                        axis: 1, // Horizontal
+                        value: h as f64,
+                    })));
+                }
+            } else {
+                // line based scrolling
+                const LINES_PER_STEP: i32 = 3;
+                const V120_STEPS_PER_LINE: i32 = 120 / LINES_PER_STEP;
+                let v = ev.get_integer_value_field(EventField::SCROLL_WHEEL_EVENT_DELTA_AXIS_1);
+                let h = ev.get_integer_value_field(EventField::SCROLL_WHEEL_EVENT_DELTA_AXIS_2);
+                if v != 0 {
+                    result.push(CaptureEvent::Input(Event::Pointer(
+                        PointerEvent::AxisDiscrete120 {
+                            axis: 0, // Vertical
+                            value: V120_STEPS_PER_LINE * v as i32,
+                        },
+                    )));
+                }
+                if h != 0 {
+                    result.push(CaptureEvent::Input(Event::Pointer(
+                        PointerEvent::AxisDiscrete120 {
+                            axis: 1, // Horizontal
+                            value: V120_STEPS_PER_LINE * h as i32,
+                        },
+                    )));
+                }
             }
         }
         _ => (),
@@ -364,7 +392,7 @@ fn create_event_tap<'a>(
         move |_proxy: CGEventTapProxy, event_type: CGEventType, cg_ev: &CGEvent| {
             log::trace!("Got event from tap: {event_type:?}");
             let mut state = client_state.blocking_lock();
-            let mut pos = None;
+            let mut capture_position = None;
             let mut res_events = vec![];
 
             if matches!(
@@ -381,7 +409,7 @@ fn create_event_tap<'a>(
 
             // Are we in a client?
             if let Some(current_pos) = state.current_pos {
-                pos = Some(current_pos);
+                capture_position = Some(current_pos);
                 get_events(
                     &event_type,
                     cg_ev,
@@ -393,16 +421,22 @@ fn create_event_tap<'a>(
                 });
 
                 // Keep (hidden) cursor at the edge of the screen
-                if matches!(event_type, CGEventType::MouseMoved) {
-                    state.reset_mouse_position(cg_ev).unwrap_or_else(|e| {
-                        log::error!("Failed to reset mouse position: {e}");
-                    })
+                if matches!(
+                    event_type,
+                    CGEventType::MouseMoved
+                        | CGEventType::LeftMouseDragged
+                        | CGEventType::RightMouseDragged
+                        | CGEventType::OtherMouseDragged
+                ) {
+                    state.reset_cursor().unwrap_or_else(|e| log::warn!("{e}"));
                 }
-            }
-            // Did we cross a barrier?
-            else if matches!(event_type, CGEventType::MouseMoved) {
+            } else if matches!(event_type, CGEventType::MouseMoved) {
+                // Did we cross a barrier?
                 if let Some(new_pos) = state.crossed(cg_ev) {
-                    pos = Some(new_pos);
+                    capture_position = Some(new_pos);
+                    state
+                        .start_capture(cg_ev, new_pos)
+                        .unwrap_or_else(|e| log::warn!("{e}"));
                     res_events.push(CaptureEvent::Begin);
                     notify_tx
                         .blocking_send(ProducerEvent::Grab(new_pos))
@@ -410,7 +444,7 @@ fn create_event_tap<'a>(
                 }
             }
 
-            if let Some(pos) = pos {
+            if let Some(pos) = capture_position {
                 res_events.iter().for_each(|e| {
                     // error must be ignored, since the event channel
                     // may already be closed when the InputCapture instance is dropped.
@@ -419,8 +453,10 @@ fn create_event_tap<'a>(
                 // Returning Drop should stop the event from being processed
                 // but core fundation still returns the event
                 cg_ev.set_type(CGEventType::Null);
+                CallbackResult::Drop
+            } else {
+                CallbackResult::Keep
             }
-            CallbackResult::Replace(cg_ev.to_owned())
         };
 
     let tap = CGEventTap::new(
@@ -515,10 +551,7 @@ impl MacOSInputCapture {
                             log::error!("Failed to handle producer event: {e}");
                         })
                     }
-
-                    _ = &mut tap_exit_rx => {
-                        break;
-                    }
+                    _ = &mut tap_exit_rx => break,
                 }
             }
             // show cursor

input-capture/src/windows.rs

@@ -5,7 +5,7 @@ use futures::Stream;
 use std::pin::Pin;
 
 use std::task::ready;
-use tokio::sync::mpsc::{channel, Receiver};
+use tokio::sync::mpsc::{Receiver, channel};
 
 use super::{Capture, CaptureError, CaptureEvent, Position};
 

input-capture/src/windows/event_thread.rs

@@ -6,33 +6,32 @@ use std::default::Default;
 use std::sync::atomic::{AtomicBool, AtomicI32, Ordering};
 use std::sync::{Arc, Condvar, Mutex};
 use std::thread;
-use tokio::sync::mpsc::error::TrySendError;
 use tokio::sync::mpsc::Sender;
-use windows::core::{w, PCWSTR};
+use tokio::sync::mpsc::error::TrySendError;
 use windows::Win32::Foundation::{FALSE, HWND, LPARAM, LRESULT, RECT, WPARAM};
 use windows::Win32::Graphics::Gdi::{
-    EnumDisplayDevicesW, EnumDisplaySettingsW, DEVMODEW, DISPLAY_DEVICEW,
-    DISPLAY_DEVICE_ATTACHED_TO_DESKTOP, ENUM_CURRENT_SETTINGS,
+    DEVMODEW, DISPLAY_DEVICE_ATTACHED_TO_DESKTOP, DISPLAY_DEVICEW, ENUM_CURRENT_SETTINGS,
+    EnumDisplayDevicesW, EnumDisplaySettingsW,
 };
 use windows::Win32::System::LibraryLoader::GetModuleHandleW;
 use windows::Win32::System::Threading::GetCurrentThreadId;
+use windows::core::{PCWSTR, w};
 
 use windows::Win32::UI::WindowsAndMessaging::{
-    CallNextHookEx, CreateWindowExW, DispatchMessageW, GetMessageW, PostThreadMessageW,
-    RegisterClassW, SetWindowsHookExW, TranslateMessage, EDD_GET_DEVICE_INTERFACE_NAME, HOOKPROC,
-    KBDLLHOOKSTRUCT, LLKHF_EXTENDED, MSG, MSLLHOOKSTRUCT, WH_KEYBOARD_LL, WH_MOUSE_LL,
-    WINDOW_STYLE, WM_DISPLAYCHANGE, WM_KEYDOWN, WM_KEYUP, WM_LBUTTONDOWN, WM_LBUTTONUP,
-    WM_MBUTTONDOWN, WM_MBUTTONUP, WM_MOUSEHWHEEL, WM_MOUSEMOVE, WM_MOUSEWHEEL, WM_RBUTTONDOWN,
-    WM_RBUTTONUP, WM_SYSKEYDOWN, WM_SYSKEYUP, WM_USER, WM_XBUTTONDOWN, WM_XBUTTONUP, WNDCLASSW,
-    WNDPROC,
+    CallNextHookEx, CreateWindowExW, DispatchMessageW, EDD_GET_DEVICE_INTERFACE_NAME, GetMessageW,
+    HOOKPROC, KBDLLHOOKSTRUCT, LLKHF_EXTENDED, MSG, MSLLHOOKSTRUCT, PostThreadMessageW,
+    RegisterClassW, SetWindowsHookExW, TranslateMessage, WH_KEYBOARD_LL, WH_MOUSE_LL, WINDOW_STYLE,
+    WM_DISPLAYCHANGE, WM_KEYDOWN, WM_KEYUP, WM_LBUTTONDOWN, WM_LBUTTONUP, WM_MBUTTONDOWN,
+    WM_MBUTTONUP, WM_MOUSEHWHEEL, WM_MOUSEMOVE, WM_MOUSEWHEEL, WM_RBUTTONDOWN, WM_RBUTTONUP,
+    WM_SYSKEYDOWN, WM_SYSKEYUP, WM_USER, WM_XBUTTONDOWN, WM_XBUTTONUP, WNDCLASSW, WNDPROC,
 };
 
 use input_event::{
+    BTN_BACK, BTN_FORWARD, BTN_LEFT, BTN_MIDDLE, BTN_RIGHT, Event, KeyboardEvent, PointerEvent,
     scancode::{self, Linux},
-    Event, KeyboardEvent, PointerEvent, BTN_BACK, BTN_FORWARD, BTN_LEFT, BTN_MIDDLE, BTN_RIGHT,
 };
 
-use super::{display_util, CaptureEvent, Position};
+use super::{CaptureEvent, Position, display_util};
 
 pub(crate) struct EventThread {
     request_buffer: Arc<Mutex<Vec<ClientUpdate>>>,

input-capture/src/x11.rs

@@ -3,7 +3,7 @@ use std::task::Poll;
 use async_trait::async_trait;
 use futures_core::Stream;
 
-use super::{error::X11InputCaptureCreationError, Capture, CaptureError, CaptureEvent, Position};
+use super::{Capture, CaptureError, CaptureEvent, Position, error::X11InputCaptureCreationError};
 
 pub struct X11InputCapture {}
 

input-emulation/src/error.rs

@@ -11,15 +11,15 @@ pub enum InputEmulationError {
     any(feature = "remote_desktop_portal", feature = "libei"),
     not(target_os = "macos")
 ))]
-use ashpd::{desktop::ResponseError, Error::Response};
+use ashpd::{Error::Response, desktop::ResponseError};
 use std::io;
 use thiserror::Error;
 
 #[cfg(all(unix, feature = "wlroots", not(target_os = "macos")))]
 use wayland_client::{
+    ConnectError, DispatchError,
     backend::WaylandError,
     globals::{BindError, GlobalError},
-    ConnectError, DispatchError,
 };
 
 #[derive(Debug, Error)]

input-emulation/src/libei.rs

@@ -1,25 +1,25 @@
-use futures::{future, StreamExt};
+use futures::{StreamExt, future};
 use std::{
     io,
     os::{fd::OwnedFd, unix::net::UnixStream},
     sync::{
-        atomic::{AtomicBool, Ordering},
         Arc, Mutex, RwLock,
+        atomic::{AtomicBool, Ordering},
     },
     time::{SystemTime, UNIX_EPOCH},
 };
 use tokio::task::JoinHandle;
 
 use ashpd::desktop::{
-    remote_desktop::{DeviceType, RemoteDesktop},
     PersistMode, Session,
+    remote_desktop::{DeviceType, RemoteDesktop},
 };
 use async_trait::async_trait;
 
 use reis::{
     ei::{
-        self, button::ButtonState, handshake::ContextType, keyboard::KeyState, Button, Keyboard,
-        Pointer, Scroll,
+        self, Button, Keyboard, Pointer, Scroll, button::ButtonState, handshake::ContextType,
+        keyboard::KeyState,
     },
     event::{self, Connection, DeviceCapability, DeviceEvent, EiEvent, SeatEvent},
     tokio::EiConvertEventStream,
@@ -29,7 +29,7 @@ use input_event::{Event, KeyboardEvent, PointerEvent};
 
 use crate::error::EmulationError;
 
-use super::{error::LibeiEmulationCreationError, Emulation, EmulationHandle};
+use super::{Emulation, EmulationHandle, error::LibeiEmulationCreationError};
 
 #[derive(Clone, Default)]
 struct Devices {
@@ -50,8 +50,8 @@ pub(crate) struct LibeiEmulation<'a> {
     session: Session<'a, RemoteDesktop<'a>>,
 }
 
-async fn get_ei_fd<'a>(
-) -> Result<(RemoteDesktop<'a>, Session<'a, RemoteDesktop<'a>>, OwnedFd), ashpd::Error> {
+async fn get_ei_fd<'a>()
+-> Result<(RemoteDesktop<'a>, Session<'a, RemoteDesktop<'a>>, OwnedFd), ashpd::Error> {
     let remote_desktop = RemoteDesktop::new().await?;
 
     log::debug!("creating session ...");

input-emulation/src/macos.rs

@@ -1,4 +1,4 @@
-use super::{error::EmulationError, Emulation, EmulationHandle};
+use super::{Emulation, EmulationHandle, error::EmulationError};
 use async_trait::async_trait;
 use bitflags::bitflags;
 use core_graphics::base::CGFloat;
@@ -10,7 +10,7 @@ use core_graphics::event::{
     ScrollEventUnit,
 };
 use core_graphics::event_source::{CGEventSource, CGEventSourceStateID};
-use input_event::{scancode, Event, KeyboardEvent, PointerEvent, BTN_LEFT, BTN_MIDDLE, BTN_RIGHT};
+use input_event::{BTN_LEFT, BTN_MIDDLE, BTN_RIGHT, Event, KeyboardEvent, PointerEvent, scancode};
 use keycode::{KeyMap, KeyMapping};
 use std::cell::Cell;
 use std::ops::{Index, IndexMut};

input-emulation/src/windows.rs

@@ -1,22 +1,22 @@
 use super::error::{EmulationError, WindowsEmulationCreationError};
 use input_event::{
-    scancode, Event, KeyboardEvent, PointerEvent, BTN_BACK, BTN_FORWARD, BTN_LEFT, BTN_MIDDLE,
-    BTN_RIGHT,
+    BTN_BACK, BTN_FORWARD, BTN_LEFT, BTN_MIDDLE, BTN_RIGHT, Event, KeyboardEvent, PointerEvent,
+    scancode,
 };
 
 use async_trait::async_trait;
 use std::ops::BitOrAssign;
 use std::time::Duration;
 use tokio::task::AbortHandle;
-use windows::Win32::UI::Input::KeyboardAndMouse::{
-    SendInput, INPUT_0, KEYEVENTF_EXTENDEDKEY, MOUSEEVENTF_XDOWN, MOUSEEVENTF_XUP,
-};
 use windows::Win32::UI::Input::KeyboardAndMouse::{
     INPUT, INPUT_KEYBOARD, INPUT_MOUSE, KEYBDINPUT, KEYEVENTF_KEYUP, KEYEVENTF_SCANCODE,
     MOUSEEVENTF_HWHEEL, MOUSEEVENTF_LEFTDOWN, MOUSEEVENTF_LEFTUP, MOUSEEVENTF_MIDDLEDOWN,
     MOUSEEVENTF_MIDDLEUP, MOUSEEVENTF_MOVE, MOUSEEVENTF_RIGHTDOWN, MOUSEEVENTF_RIGHTUP,
     MOUSEEVENTF_WHEEL, MOUSEINPUT,
 };
+use windows::Win32::UI::Input::KeyboardAndMouse::{
+    INPUT_0, KEYEVENTF_EXTENDEDKEY, MOUSEEVENTF_XDOWN, MOUSEEVENTF_XUP, SendInput,
+};
 use windows::Win32::UI::WindowsAndMessaging::{XBUTTON1, XBUTTON2};
 
 use super::{Emulation, EmulationHandle};

input-emulation/src/wlroots.rs

@@ -1,6 +1,6 @@
 use crate::error::EmulationError;
 
-use super::{error::WlrootsEmulationCreationError, Emulation};
+use super::{Emulation, error::WlrootsEmulationCreationError};
 use async_trait::async_trait;
 use bitflags::bitflags;
 use std::collections::HashMap;
@@ -8,8 +8,8 @@ use std::io;
 use std::os::fd::{AsFd, OwnedFd};
 use std::sync::{Arc, Mutex};
 use std::time::{SystemTime, UNIX_EPOCH};
-use wayland_client::backend::WaylandError;
 use wayland_client::WEnum;
+use wayland_client::backend::WaylandError;
 
 use wayland_client::protocol::wl_keyboard::{self, WlKeyboard};
 use wayland_client::protocol::wl_pointer::{Axis, AxisSource, ButtonState};
@@ -25,16 +25,15 @@ use wayland_protocols_misc::zwp_virtual_keyboard_v1::client::{
 };
 
 use wayland_client::{
-    delegate_noop,
-    globals::{registry_queue_init, GlobalListContents},
+    Connection, Dispatch, EventQueue, QueueHandle, delegate_noop,
+    globals::{GlobalListContents, registry_queue_init},
     protocol::{wl_registry, wl_seat},
-    Connection, Dispatch, EventQueue, QueueHandle,
 };
 
-use input_event::{scancode, Event, KeyboardEvent, PointerEvent};
+use input_event::{Event, KeyboardEvent, PointerEvent, scancode};
 
-use super::error::WaylandBindError;
 use super::EmulationHandle;
+use super::error::WaylandBindError;
 
 struct State {
     keymap: Option<(u32, OwnedFd, u32)>,

input-emulation/src/x11.rs

@@ -6,12 +6,12 @@ use x11::{
 };
 
 use input_event::{
-    Event, KeyboardEvent, PointerEvent, BTN_BACK, BTN_FORWARD, BTN_LEFT, BTN_MIDDLE, BTN_RIGHT,
+    BTN_BACK, BTN_FORWARD, BTN_LEFT, BTN_MIDDLE, BTN_RIGHT, Event, KeyboardEvent, PointerEvent,
 };
 
 use crate::error::EmulationError;
 
-use super::{error::X11EmulationCreationError, Emulation, EmulationHandle};
+use super::{Emulation, EmulationHandle, error::X11EmulationCreationError};
 
 pub(crate) struct X11Emulation {
     display: *mut xlib::Display,

input-emulation/src/xdg_desktop_portal.rs

@@ -1,7 +1,7 @@
 use ashpd::{
     desktop::{
-        remote_desktop::{Axis, DeviceType, KeyState, RemoteDesktop},
         PersistMode, Session,
+        remote_desktop::{Axis, DeviceType, KeyState, RemoteDesktop},
     },
     zbus::AsyncDrop,
 };
@@ -15,7 +15,7 @@ use input_event::{
 
 use crate::error::EmulationError;
 
-use super::{error::XdpEmulationCreationError, Emulation, EmulationHandle};
+use super::{Emulation, EmulationHandle, error::XdpEmulationCreationError};
 
 pub(crate) struct DesktopPortalEmulation<'a> {
     proxy: RemoteDesktop<'a>,

lan-mouse-cli/src/lib.rs

@@ -5,8 +5,8 @@ use std::{net::IpAddr, time::Duration};
 use thiserror::Error;
 
 use lan_mouse_ipc::{
-    connect_async, ClientHandle, ConnectionError, FrontendEvent, FrontendRequest, IpcError,
-    Position,
+    ClientHandle, ConnectionError, FrontendEvent, FrontendRequest, IpcError, Position,
+    connect_async,
 };
 
 #[derive(Debug, Error)]
@@ -71,6 +71,8 @@ enum CliSubcommand {
     },
     /// deauthorize a public key
     RemoveAuthorizedKey { sha256_fingerprint: String },
+    /// save configuration to file
+    SaveConfig,
 }
 
 pub async fn run(args: CliArgs) -> Result<(), CliError> {
@@ -162,6 +164,7 @@ async fn execute(cmd: CliSubcommand) -> Result<(), CliError> {
             tx.request(FrontendRequest::RemoveAuthorizedKey(sha256_fingerprint))
                 .await?
         }
+        CliSubcommand::SaveConfig => tx.request(FrontendRequest::SaveConfiguration).await?,
     }
     Ok(())
 }

lan-mouse-gtk/src/authorization_window/imp.rs

@@ -4,8 +4,9 @@ use adw::prelude::*;
 use adw::subclass::prelude::*;
 use glib::subclass::InitializingObject;
 use gtk::{
+    Button, CompositeTemplate, Label,
     glib::{self, subclass::Signal},
-    template_callbacks, Button, CompositeTemplate, Label,
+    template_callbacks,
 };
 
 #[derive(CompositeTemplate, Default)]

lan-mouse-gtk/src/client_row.rs

@@ -4,7 +4,7 @@ use adw::prelude::*;
 use adw::subclass::prelude::*;
 use gtk::glib::{self, Object};
 
-use lan_mouse_ipc::{Position, DEFAULT_PORT};
+use lan_mouse_ipc::{DEFAULT_PORT, Position};
 
 use super::ClientObject;
 

lan-mouse-gtk/src/client_row/imp.rs

@@ -1,11 +1,11 @@
 use std::cell::RefCell;
 
 use adw::subclass::prelude::*;
-use adw::{prelude::*, ActionRow, ComboRow};
-use glib::{subclass::InitializingObject, Binding};
+use adw::{ActionRow, ComboRow, prelude::*};
+use glib::{Binding, subclass::InitializingObject};
 use gtk::glib::subclass::Signal;
-use gtk::glib::{clone, SignalHandlerId};
-use gtk::{glib, Button, CompositeTemplate, Entry, Switch};
+use gtk::glib::{SignalHandlerId, clone};
+use gtk::{Button, CompositeTemplate, Entry, Switch, glib};
 use lan_mouse_ipc::Position;
 use std::sync::OnceLock;
 

lan-mouse-gtk/src/fingerprint_window/imp.rs

@@ -4,8 +4,9 @@ use adw::prelude::*;
 use adw::subclass::prelude::*;
 use glib::subclass::InitializingObject;
 use gtk::{
+    Button, CompositeTemplate, Text,
     glib::{self, subclass::Signal},
-    template_callbacks, Button, CompositeTemplate, Text,
+    template_callbacks,
 };
 
 #[derive(CompositeTemplate, Default)]
@@ -51,9 +52,11 @@ impl ObjectImpl for FingerprintWindow {
     fn signals() -> &'static [Signal] {
         static SIGNALS: OnceLock<Vec<Signal>> = OnceLock::new();
         SIGNALS.get_or_init(|| {
-            vec![Signal::builder("confirm-clicked")
-                .param_types([String::static_type(), String::static_type()])
-                .build()]
+            vec![
+                Signal::builder("confirm-clicked")
+                    .param_types([String::static_type(), String::static_type()])
+                    .build(),
+            ]
         })
     }
 }

lan-mouse-gtk/src/key_row/imp.rs

@@ -1,11 +1,11 @@
 use std::cell::RefCell;
 
 use adw::subclass::prelude::*;
-use adw::{prelude::*, ActionRow};
-use glib::{subclass::InitializingObject, Binding};
+use adw::{ActionRow, prelude::*};
+use glib::{Binding, subclass::InitializingObject};
 use gtk::glib::clone;
 use gtk::glib::subclass::Signal;
-use gtk::{glib, Button, CompositeTemplate};
+use gtk::{Button, CompositeTemplate, glib};
 use std::sync::OnceLock;
 
 #[derive(CompositeTemplate, Default)]

lan-mouse-gtk/src/lib.rs

@@ -13,7 +13,7 @@ use window::Window;
 use lan_mouse_ipc::FrontendEvent;
 
 use adw::Application;
-use gtk::{gdk::Display, glib::clone, prelude::*, IconTheme};
+use gtk::{IconTheme, gdk::Display, glib::clone, prelude::*};
 use gtk::{gio, glib, prelude::ApplicationExt};
 
 use self::client_object::ClientObject;

lan-mouse-gtk/src/window.rs

@@ -4,16 +4,15 @@ use std::collections::HashMap;
 
 use adw::prelude::*;
 use adw::subclass::prelude::*;
-use glib::{clone, Object};
+use glib::{Object, clone};
 use gtk::{
-    gio,
+    NoSelection, gio,
     glib::{self, closure_local},
-    NoSelection,
 };
 
 use lan_mouse_ipc::{
-    ClientConfig, ClientHandle, ClientState, FrontendRequest, FrontendRequestWriter, Position,
-    DEFAULT_PORT,
+    ClientConfig, ClientHandle, ClientState, DEFAULT_PORT, FrontendRequest, FrontendRequestWriter,
+    Position,
 };
 
 use crate::{

lan-mouse-gtk/src/window/imp.rs

@@ -1,12 +1,12 @@
 use std::cell::{Cell, RefCell};
 
 use adw::subclass::prelude::*;
-use adw::{prelude::*, ActionRow, PreferencesGroup, ToastOverlay};
+use adw::{ActionRow, PreferencesGroup, ToastOverlay, prelude::*};
 use glib::subclass::InitializingObject;
 use gtk::glib::clone;
-use gtk::{gdk, gio, glib, Button, CompositeTemplate, Entry, Image, Label, ListBox};
+use gtk::{Button, CompositeTemplate, Entry, Image, Label, ListBox, gdk, gio, glib};
 
-use lan_mouse_ipc::{FrontendRequestWriter, DEFAULT_PORT};
+use lan_mouse_ipc::{DEFAULT_PORT, FrontendRequestWriter};
 
 use crate::authorization_window::AuthorizationWindow;
 

lan-mouse-ipc/src/connect.rs

@@ -1,7 +1,7 @@
 use crate::{ConnectionError, FrontendEvent, FrontendRequest, IpcError};
 use std::{
     cmp::min,
-    io::{self, prelude::*, BufReader, LineWriter, Lines},
+    io::{self, BufReader, LineWriter, Lines, prelude::*},
     thread,
     time::Duration,
 };

lan-mouse-ipc/src/connect_async.rs

@@ -1,7 +1,7 @@
 use crate::{ConnectionError, FrontendEvent, FrontendRequest, IpcError};
 use std::{
     cmp::min,
-    task::{ready, Poll},
+    task::{Poll, ready},
     time::Duration,
 };
 

lan-mouse-ipc/src/lib.rs

@@ -20,8 +20,8 @@ mod connect;
 mod connect_async;
 mod listen;
 
-pub use connect::{connect, FrontendEventReader, FrontendRequestWriter};
-pub use connect_async::{connect_async, AsyncFrontendEventReader, AsyncFrontendRequestWriter};
+pub use connect::{FrontendEventReader, FrontendRequestWriter, connect};
+pub use connect_async::{AsyncFrontendEventReader, AsyncFrontendRequestWriter, connect_async};
 pub use listen::AsyncFrontendListener;
 
 #[derive(Debug, Error)]
@@ -253,6 +253,8 @@ pub enum FrontendRequest {
     RemoveAuthorizedKey(String),
     /// change the hook command
     UpdateEnterHook(u64, Option<String>),
+    /// save config file
+    SaveConfiguration,
 }
 
 #[derive(Clone, Copy, PartialEq, Eq, Debug, Default, Serialize, Deserialize)]

lan-mouse-ipc/src/listen.rs

@@ -1,4 +1,4 @@
-use futures::{stream::SelectAll, Stream, StreamExt};
+use futures::{Stream, StreamExt, stream::SelectAll};
 #[cfg(unix)]
 use std::path::PathBuf;
 use std::{
@@ -63,7 +63,7 @@ impl AsyncFrontendListener {
                 Ok(ls) => ls,
                 // some other lan-mouse instance has bound the socket in the meantime
                 Err(e) if e.kind() == ErrorKind::AddrInUse => {
-                    return Err(IpcListenerCreationError::AlreadyRunning)
+                    return Err(IpcListenerCreationError::AlreadyRunning);
                 }
                 Err(e) => return Err(IpcListenerCreationError::Bind(e)),
             };
@@ -75,7 +75,7 @@ impl AsyncFrontendListener {
             Ok(ls) => ls,
             // some other lan-mouse instance has bound the socket in the meantime
             Err(e) if e.kind() == ErrorKind::AddrInUse => {
-                return Err(IpcListenerCreationError::AlreadyRunning)
+                return Err(IpcListenerCreationError::AlreadyRunning);
             }
             Err(e) => return Err(IpcListenerCreationError::Bind(e)),
         };

nix/README.md

@@ -1,18 +1,18 @@
 # Nix Flake Usage
 
-## run
+## Run
 
 ```bash
 nix run github:feschber/lan-mouse
 
-# with params
+# With params
 nix run github:feschber/lan-mouse -- --help
 
 ```
 
-## home-manager module
+## Home-manager module
 
-add input
+Add input:
 
 ```nix
 inputs = {
@@ -20,14 +20,27 @@ inputs = {
 }
 ```
 
-enable lan-mouse
+Optional: add [our binary cache](https://app.cachix.org/cache/lan-mouse) to allow a faster package install.
+
+```nix
+nixConfig = {
+    extra-substituters = [
+        "https://lan-mouse.cachix.org/"
+    ];
+    extra-trusted-public-keys = [
+      "lan-mouse.cachix.org-1:KlE2AEZUgkzNKM7BIzMQo8w9yJYqUpor1CAUNRY6OyM="
+    ];
+};
+```
+
+Enable lan-mouse:
 
 ``` nix
 {
   inputs,
   ...
 }: {
-  # add the home manager module
+  # Add the Home Manager module
   imports = [inputs.lan-mouse.homeManagerModules.default];
 
   programs.lan-mouse = {

src/capture.rs

@@ -10,8 +10,8 @@ use input_capture::{
 };
 use input_event::scancode;
 use lan_mouse_proto::ProtoEvent;
-use local_channel::mpsc::{channel, Receiver, Sender};
-use tokio::task::{spawn_local, JoinHandle};
+use local_channel::mpsc::{Receiver, Sender, channel};
+use tokio::task::{JoinHandle, spawn_local};
 use tokio_util::sync::CancellationToken;
 
 use crate::connect::LanMouseConnection;
@@ -362,7 +362,13 @@ impl CaptureTask {
     }
 
     async fn release_capture(&mut self, capture: &mut InputCapture) -> Result<(), CaptureError> {
-        self.active_client.take();
+        // If we have an active client, notify them we're leaving
+        if let Some(handle) = self.active_client.take() {
+            log::info!("sending Leave event to client {handle}");
+            if let Err(e) = self.conn.send(ProtoEvent::Leave(0), handle).await {
+                log::warn!("failed to send Leave to client {handle}: {e}");
+            }
+        }
         capture.release().await
     }
 }

src/client.rs

@@ -15,6 +15,15 @@ pub struct ClientManager {
 }
 
 impl ClientManager {
+    /// get all clients
+    pub fn clients(&self) -> Vec<(ClientConfig, ClientState)> {
+        self.clients
+            .borrow()
+            .iter()
+            .map(|(_, c)| c.clone())
+            .collect::<Vec<_>>()
+    }
+
     /// add a new client to this manager
     pub fn add_client(&self) -> ClientHandle {
         self.clients.borrow_mut().insert(Default::default()) as ClientHandle

src/config.rs

@@ -11,9 +11,10 @@ use std::path::{Path, PathBuf};
 use std::{collections::HashSet, io};
 use thiserror::Error;
 use toml;
+use toml_edit::{self, DocumentMut};
 
 use lan_mouse_cli::CliArgs;
-use lan_mouse_ipc::{Position, DEFAULT_PORT};
+use lan_mouse_ipc::{DEFAULT_PORT, Position};
 
 use input_event::scancode::{
     self,
@@ -44,7 +45,7 @@ fn default_path() -> Result<PathBuf, VarError> {
     Ok(PathBuf::from(default_path))
 }
 
-#[derive(Serialize, Deserialize, Debug)]
+#[derive(Serialize, Deserialize, Clone, Debug, Default)]
 struct ConfigToml {
     capture_backend: Option<CaptureBackend>,
     emulation_backend: Option<EmulationBackend>,
@@ -274,6 +275,33 @@ impl From<TomlClient> for ConfigClient {
     }
 }
 
+impl From<ConfigClient> for TomlClient {
+    fn from(client: ConfigClient) -> Self {
+        let hostname = client.hostname;
+        let host_name = None;
+        let mut ips = client.ips.into_iter().collect::<Vec<_>>();
+        ips.sort();
+        let ips = Some(ips);
+        let port = if client.port == DEFAULT_PORT {
+            None
+        } else {
+            Some(client.port)
+        };
+        let position = Some(client.pos);
+        let activate_on_startup = if client.active { Some(true) } else { None };
+        let enter_hook = client.enter_hook;
+        Self {
+            hostname,
+            host_name,
+            ips,
+            port,
+            position,
+            activate_on_startup,
+            enter_hook,
+        }
+    }
+}
+
 #[derive(Debug, Error)]
 pub enum ConfigError {
     #[error(transparent)]
@@ -384,4 +412,57 @@ impl Config {
             .and_then(|c| c.release_bind.clone())
             .unwrap_or(Vec::from_iter(DEFAULT_RELEASE_KEYS.iter().cloned()))
     }
+
+    /// set configured clients
+    pub fn set_clients(&mut self, clients: Vec<ConfigClient>) {
+        if clients.is_empty() {
+            return;
+        }
+        if self.config_toml.is_none() {
+            self.config_toml = Default::default();
+        }
+        self.config_toml.as_mut().expect("config").clients =
+            Some(clients.into_iter().map(|c| c.into()).collect::<Vec<_>>());
+    }
+
+    /// set authorized keys
+    pub fn set_authorized_keys(&mut self, fingerprints: HashMap<String, String>) {
+        if fingerprints.is_empty() {
+            return;
+        }
+        if self.config_toml.is_none() {
+            self.config_toml = Default::default();
+        }
+        self.config_toml
+            .as_mut()
+            .expect("config")
+            .authorized_fingerprints = Some(fingerprints);
+    }
+
+    pub fn write_back(&self) -> Result<(), io::Error> {
+        log::info!("writing config to {:?}", &self.config_path);
+        /* load the current configuration file */
+        let current_config = fs::read_to_string(&self.config_path)?;
+        let current_config = current_config.parse::<DocumentMut>().expect("fix me");
+        let _current_config =
+            toml_edit::de::from_document::<ConfigToml>(current_config).expect("fixme");
+
+        /* the new config */
+        let new_config = self.config_toml.clone().unwrap_or_default();
+        // let new_config = toml_edit::ser::to_document::<ConfigToml>(&new_config).expect("fixme");
+        let new_config = toml_edit::ser::to_string_pretty(&new_config).expect("config");
+
+        /*
+         * TODO merge documents => eventually we might want to split this up into clients configured
+         * via the config file and clients managed through the GUI / frontend.
+         * The latter should be saved to $XDG_DATA_HOME instead of $XDG_CONFIG_HOME,
+         * and clients configured through .config could be made permanent.
+         * For now we just override the config file.
+         */
+
+        /* write new config to file */
+        fs::write(&self.config_path, new_config)?;
+
+        Ok(())
+    }
 }

src/connect.rs

@@ -1,7 +1,7 @@
 use crate::client::ClientManager;
 use lan_mouse_ipc::{ClientHandle, DEFAULT_PORT};
-use lan_mouse_proto::{ProtoEvent, MAX_EVENT_SIZE};
-use local_channel::mpsc::{channel, Receiver, Sender};
+use lan_mouse_proto::{MAX_EVENT_SIZE, ProtoEvent};
+use local_channel::mpsc::{Receiver, Sender, channel};
 use std::{
     cell::RefCell,
     collections::{HashMap, HashSet},
@@ -15,7 +15,7 @@ use thiserror::Error;
 use tokio::{
     net::UdpSocket,
     sync::Mutex,
-    task::{spawn_local, JoinSet},
+    task::{JoinSet, spawn_local},
 };
 use webrtc_dtls::{
     config::{Config, ExtendedMasterSecretType},
@@ -223,14 +223,18 @@ async fn ping_pong(
 ) {
     loop {
         let (buf, len) = ProtoEvent::Ping.into();
-        if let Err(e) = conn.send(&buf[..len]).await {
-            log::warn!("{addr}: send error `{e}`, closing connection");
-            let _ = conn.close().await;
-            break;
-        }
-        log::trace!("PING >->->->->- {addr}");
 
-        tokio::time::sleep(Duration::from_millis(500)).await;
+        // send 4 pings, at least one must be answered
+        for _ in 0..4 {
+            if let Err(e) = conn.send(&buf[..len]).await {
+                log::warn!("{addr}: send error `{e}`, closing connection");
+                let _ = conn.close().await;
+                break;
+            }
+            log::trace!("PING >->->->->- {addr}");
+
+            tokio::time::sleep(Duration::from_millis(500)).await;
+        }
 
         if !ping_response.borrow_mut().remove(&addr) {
             log::warn!("{addr} did not respond, closing connection");

src/dns.rs

@@ -1,7 +1,7 @@
 use std::{collections::HashMap, net::IpAddr};
 
-use local_channel::mpsc::{channel, Receiver, Sender};
-use tokio::task::{spawn_local, JoinHandle};
+use local_channel::mpsc::{Receiver, Sender, channel};
+use tokio::task::{JoinHandle, spawn_local};
 
 use hickory_resolver::{ResolveError, TokioResolver};
 use tokio_util::sync::CancellationToken;

src/emulation.rs

@@ -3,7 +3,7 @@ use futures::StreamExt;
 use input_emulation::{EmulationHandle, InputEmulation, InputEmulationError};
 use input_event::Event;
 use lan_mouse_proto::{Position, ProtoEvent};
-use local_channel::mpsc::{channel, Receiver, Sender};
+use local_channel::mpsc::{Receiver, Sender, channel};
 use std::{
     cell::Cell,
     collections::HashMap,
@@ -13,7 +13,7 @@ use std::{
 };
 use tokio::{
     select,
-    task::{spawn_local, JoinHandle},
+    task::{JoinHandle, spawn_local},
 };
 
 /// emulation handling events received from a listener

src/listen.rs

@@ -1,6 +1,6 @@
 use futures::{Stream, StreamExt};
-use lan_mouse_proto::{ProtoEvent, MAX_EVENT_SIZE};
-use local_channel::mpsc::{channel, Receiver, Sender};
+use lan_mouse_proto::{MAX_EVENT_SIZE, ProtoEvent};
+use local_channel::mpsc::{Receiver, Sender, channel};
 use rustls::pki_types::CertificateDer;
 use std::{
     collections::{HashMap, VecDeque},
@@ -12,7 +12,7 @@ use std::{
 use thiserror::Error;
 use tokio::{
     sync::Mutex as AsyncMutex,
-    task::{spawn_local, JoinHandle},
+    task::{JoinHandle, spawn_local},
 };
 use webrtc_dtls::{
     config::{ClientAuthType::RequireAnyClientCert, Config, ExtendedMasterSecretType},
@@ -20,7 +20,7 @@ use webrtc_dtls::{
     crypto::Certificate,
     listener::listen,
 };
-use webrtc_util::{conn::Listener, Conn, Error};
+use webrtc_util::{Conn, Error, conn::Listener};
 
 use crate::crypto;
 

src/service.rs

@@ -1,7 +1,7 @@
 use crate::{
     capture::{Capture, CaptureType, ICaptureEvent},
     client::ClientManager,
-    config::Config,
+    config::{Config, ConfigClient},
     connect::LanMouseConnection,
     crypto,
     dns::{DnsEvent, DnsResolver},
@@ -39,6 +39,8 @@ pub enum ServiceError {
 }
 
 pub struct Service {
+    /// configuration
+    config: Config,
     /// input capture
     capture: Capture,
     /// input emulation
@@ -122,6 +124,7 @@ impl Service {
 
         let port = config.port();
         let service = Self {
+            config,
             capture,
             emulation,
             frontend_listener,
@@ -182,24 +185,73 @@ impl Service {
             Err(e) => return log::error!("error receiving request: {e}"),
         };
         match request {
-            FrontendRequest::Activate(handle, active) => self.set_client_active(handle, active),
-            FrontendRequest::AuthorizeKey(desc, fp) => self.add_authorized_key(desc, fp),
+            FrontendRequest::Activate(handle, active) => {
+                self.set_client_active(handle, active);
+                self.save_config();
+            }
+            FrontendRequest::AuthorizeKey(desc, fp) => {
+                self.add_authorized_key(desc, fp);
+                self.save_config();
+            }
             FrontendRequest::ChangePort(port) => self.change_port(port),
-            FrontendRequest::Create => self.add_client(),
-            FrontendRequest::Delete(handle) => self.remove_client(handle),
+            FrontendRequest::Create => {
+                self.add_client();
+                self.save_config();
+            }
+            FrontendRequest::Delete(handle) => {
+                self.remove_client(handle);
+                self.save_config();
+            }
             FrontendRequest::EnableCapture => self.capture.reenable(),
             FrontendRequest::EnableEmulation => self.emulation.reenable(),
             FrontendRequest::Enumerate() => self.enumerate(),
-            FrontendRequest::UpdateFixIps(handle, fix_ips) => self.update_fix_ips(handle, fix_ips),
-            FrontendRequest::UpdateHostname(handle, host) => self.update_hostname(handle, host),
-            FrontendRequest::UpdatePort(handle, port) => self.update_port(handle, port),
-            FrontendRequest::UpdatePosition(handle, pos) => self.update_pos(handle, pos),
+            FrontendRequest::UpdateFixIps(handle, fix_ips) => {
+                self.update_fix_ips(handle, fix_ips);
+                self.save_config();
+            }
+            FrontendRequest::UpdateHostname(handle, host) => {
+                self.update_hostname(handle, host);
+                self.save_config();
+            }
+            FrontendRequest::UpdatePort(handle, port) => {
+                self.update_port(handle, port);
+                self.save_config();
+            }
+            FrontendRequest::UpdatePosition(handle, pos) => {
+                self.update_pos(handle, pos);
+                self.save_config();
+            }
             FrontendRequest::ResolveDns(handle) => self.resolve(handle),
             FrontendRequest::Sync => self.sync_frontend(),
-            FrontendRequest::RemoveAuthorizedKey(key) => self.remove_authorized_key(key),
+            FrontendRequest::RemoveAuthorizedKey(key) => {
+                self.remove_authorized_key(key);
+                self.save_config();
+            }
             FrontendRequest::UpdateEnterHook(handle, enter_hook) => {
                 self.update_enter_hook(handle, enter_hook)
             }
+            FrontendRequest::SaveConfiguration => self.save_config(),
+        }
+    }
+
+    fn save_config(&mut self) {
+        let clients = self.client_manager.clients();
+        let clients = clients
+            .into_iter()
+            .map(|(c, s)| ConfigClient {
+                ips: HashSet::from_iter(c.fix_ips),
+                hostname: c.hostname,
+                port: c.port,
+                pos: c.pos,
+                active: s.active,
+                enter_hook: c.cmd,
+            })
+            .collect();
+        self.config.set_clients(clients);
+        let authorized_keys = self.authorized_keys.read().expect("lock").clone();
+        self.config.set_authorized_keys(authorized_keys);
+        if let Err(e) = self.config.write_back() {
+            log::warn!("failed to write config: {e}");
         }
     }