simplify configuration

this removes the cli frontend entirely, replacing it with a subcommand instead

Cargo.lock

@@ -1,6 +1,6 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
-version = 3
+version = 4
 
 [[package]]
 name = "addr2line"
@@ -2005,8 +2005,10 @@ dependencies = [
 name = "lan-mouse-cli"
 version = "0.2.0"
 dependencies = [
+ "clap",
  "futures",
  "lan-mouse-ipc",
+ "thiserror 2.0.0",
  "tokio",
 ]
 
@@ -2021,6 +2023,7 @@ dependencies = [
  "lan-mouse-ipc",
  "libadwaita",
  "log",
+ "thiserror 2.0.0",
 ]
 
 [[package]]

README.md

@@ -144,10 +144,11 @@ rust toolchain.
 Additionally, available backends and frontends can be configured manually via
 [cargo features](https://doc.rust-lang.org/cargo/reference/features.html).
 
-E.g. if only wayland support is needed, the following command produces
-an executable with just support for wayland:
+E.g. if only support for sway is needed, the following command produces
+an executable with support for only the `layer-shell` capture backend
+and `wlroots` emulation backend:
 ```sh
-cargo build --no-default-features --features wayland
+cargo build --no-default-features --features layer_shell_capture,wlroots_emulation
 ```
 For a detailed list of available features, checkout the [Cargo.toml](./Cargo.toml)
 </details>
@@ -287,10 +288,10 @@ $ cargo run --release -- --frontend cli
 
 Lan Mouse can be launched in daemon mode to keep it running in the background (e.g. for use in a systemd-service).
 
-To do so, add `--daemon` to the commandline args:
+To do so, use the `daemon` subcommand:
 
 ```sh
-lan-mouse --daemon
+lan-mouse daemon
 ```
 
 In order to start lan-mouse with a graphical session automatically,

lan-mouse-cli/Cargo.toml

@@ -9,6 +9,8 @@ repository = "https://github.com/feschber/lan-mouse"
 [dependencies]
 futures = "0.3.30"
 lan-mouse-ipc = { path = "../lan-mouse-ipc", version = "0.2.0" }
+clap = { version = "4.4.11", features = ["derive"] }
+thiserror = "2.0.0"
 tokio = { version = "1.32.0", features = [
     "io-util",
     "io-std",

lan-mouse-cli/src/command.rs

@@ -1,153 +0,0 @@
-use std::{
-    fmt::Display,
-    str::{FromStr, SplitWhitespace},
-};
-
-use lan_mouse_ipc::{ClientHandle, Position};
-
-pub(super) enum CommandType {
-    NoCommand,
-    Help,
-    Connect,
-    Disconnect,
-    Activate,
-    Deactivate,
-    List,
-    SetHost,
-    SetPort,
-}
-
-#[derive(Debug)]
-pub(super) struct InvalidCommand {
-    cmd: String,
-}
-
-impl Display for InvalidCommand {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        write!(f, "invalid command: \"{}\"", self.cmd)
-    }
-}
-
-impl FromStr for CommandType {
-    type Err = InvalidCommand;
-
-    fn from_str(s: &str) -> std::prelude::v1::Result<Self, Self::Err> {
-        match s {
-            "connect" => Ok(Self::Connect),
-            "disconnect" => Ok(Self::Disconnect),
-            "activate" => Ok(Self::Activate),
-            "deactivate" => Ok(Self::Deactivate),
-            "list" => Ok(Self::List),
-            "set-host" => Ok(Self::SetHost),
-            "set-port" => Ok(Self::SetPort),
-            "help" => Ok(Self::Help),
-            _ => Err(InvalidCommand { cmd: s.to_string() }),
-        }
-    }
-}
-
-#[derive(Debug)]
-pub(super) enum Command {
-    None,
-    Help,
-    Connect(Position, String, Option<u16>),
-    Disconnect(ClientHandle),
-    Activate(ClientHandle),
-    Deactivate(ClientHandle),
-    List,
-    SetHost(ClientHandle, String),
-    SetPort(ClientHandle, Option<u16>),
-}
-
-impl CommandType {
-    pub(super) fn usage(&self) -> &'static str {
-        match self {
-            CommandType::Help => "help",
-            CommandType::NoCommand => "",
-            CommandType::Connect => "connect left|right|top|bottom <host> [<port>]",
-            CommandType::Disconnect => "disconnect <id>",
-            CommandType::Activate => "activate <id>",
-            CommandType::Deactivate => "deactivate <id>",
-            CommandType::List => "list",
-            CommandType::SetHost => "set-host <id> <host>",
-            CommandType::SetPort => "set-port <id> <host>",
-        }
-    }
-}
-
-pub(super) enum CommandParseError {
-    Usage(CommandType),
-    Invalid(InvalidCommand),
-}
-
-impl Display for CommandParseError {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        match self {
-            Self::Usage(cmd) => write!(f, "usage: {}", cmd.usage()),
-            Self::Invalid(cmd) => write!(f, "{}", cmd),
-        }
-    }
-}
-
-impl FromStr for Command {
-    type Err = CommandParseError;
-
-    fn from_str(cmd: &str) -> Result<Self, Self::Err> {
-        let mut args = cmd.split_whitespace();
-        let cmd_type: CommandType = match args.next() {
-            Some(c) => c.parse().map_err(CommandParseError::Invalid),
-            None => Ok(CommandType::NoCommand),
-        }?;
-        match cmd_type {
-            CommandType::Help => Ok(Command::Help),
-            CommandType::NoCommand => Ok(Command::None),
-            CommandType::Connect => parse_connect_cmd(args),
-            CommandType::Disconnect => parse_disconnect_cmd(args),
-            CommandType::Activate => parse_activate_cmd(args),
-            CommandType::Deactivate => parse_deactivate_cmd(args),
-            CommandType::List => Ok(Command::List),
-            CommandType::SetHost => parse_set_host(args),
-            CommandType::SetPort => parse_set_port(args),
-        }
-    }
-}
-
-fn parse_connect_cmd(mut args: SplitWhitespace<'_>) -> Result<Command, CommandParseError> {
-    const USAGE: CommandParseError = CommandParseError::Usage(CommandType::Connect);
-    let pos = args.next().ok_or(USAGE)?.parse().map_err(|_| USAGE)?;
-    let host = args.next().ok_or(USAGE)?.to_string();
-    let port = args.next().and_then(|p| p.parse().ok());
-    Ok(Command::Connect(pos, host, port))
-}
-
-fn parse_disconnect_cmd(mut args: SplitWhitespace<'_>) -> Result<Command, CommandParseError> {
-    const USAGE: CommandParseError = CommandParseError::Usage(CommandType::Disconnect);
-    let id = args.next().ok_or(USAGE)?.parse().map_err(|_| USAGE)?;
-    Ok(Command::Disconnect(id))
-}
-
-fn parse_activate_cmd(mut args: SplitWhitespace<'_>) -> Result<Command, CommandParseError> {
-    const USAGE: CommandParseError = CommandParseError::Usage(CommandType::Activate);
-    let id = args.next().ok_or(USAGE)?.parse().map_err(|_| USAGE)?;
-    Ok(Command::Activate(id))
-}
-
-fn parse_deactivate_cmd(mut args: SplitWhitespace<'_>) -> Result<Command, CommandParseError> {
-    const USAGE: CommandParseError = CommandParseError::Usage(CommandType::Deactivate);
-    let id = args.next().ok_or(USAGE)?.parse().map_err(|_| USAGE)?;
-    Ok(Command::Deactivate(id))
-}
-
-fn parse_set_host(mut args: SplitWhitespace<'_>) -> Result<Command, CommandParseError> {
-    const USAGE: CommandParseError = CommandParseError::Usage(CommandType::SetHost);
-    let id = args.next().ok_or(USAGE)?.parse().map_err(|_| USAGE)?;
-    let host = args.next().ok_or(USAGE)?.parse().map_err(|_| USAGE)?;
-    Ok(Command::SetHost(id, host))
-}
-
-fn parse_set_port(mut args: SplitWhitespace<'_>) -> Result<Command, CommandParseError> {
-    const USAGE: CommandParseError = CommandParseError::Usage(CommandType::SetPort);
-    let id = args.next().ok_or(USAGE)?.parse().map_err(|_| USAGE)?;
-    let port = args.next().and_then(|p| p.parse().ok());
-    Ok(Command::SetPort(id, port))
-}

lan-mouse-cli/src/lib.rs

@@ -1,320 +1,167 @@
+use clap::{Args, Parser, Subcommand};
 use futures::StreamExt;
-use tokio::{
-    io::{AsyncBufReadExt, BufReader},
-    task::LocalSet,
-};
 
-use std::io::{self, Write};
-
-use self::command::{Command, CommandType};
+use std::{net::IpAddr, time::Duration};
+use thiserror::Error;
 
 use lan_mouse_ipc::{
-    AsyncFrontendEventReader, AsyncFrontendRequestWriter, ClientConfig, ClientHandle, ClientState,
-    FrontendEvent, FrontendRequest, IpcError, DEFAULT_PORT,
+    connect_async, ClientHandle, ConnectionError, FrontendEvent, FrontendRequest, IpcError,
+    Position,
 };
 
-mod command;
+#[derive(Debug, Error)]
+pub enum CliError {
+    /// is the service running?
+    #[error("could not connect: `{0}` - is the service running?")]
+    ServiceNotRunning(#[from] ConnectionError),
+    #[error("error communicating with service: {0}")]
+    Ipc(#[from] IpcError),
+}
 
-pub fn run() -> Result<(), IpcError> {
-    let runtime = tokio::runtime::Builder::new_current_thread()
-        .enable_io()
-        .enable_time()
-        .build()?;
-    runtime.block_on(LocalSet::new().run_until(async move {
-        let (rx, tx) = lan_mouse_ipc::connect_async().await?;
-        let mut cli = Cli::new(rx, tx);
-        cli.run().await
-    }))?;
+#[derive(Parser, Clone, Debug, PartialEq, Eq)]
+#[command(name = "lan-mouse-cli", about = "LanMouse CLI interface")]
+pub struct CliArgs {
+    #[command(subcommand)]
+    command: CliSubcommand,
+}
+
+#[derive(Args, Clone, Debug, PartialEq, Eq)]
+struct Client {
+    #[arg(long)]
+    hostname: Option<String>,
+    #[arg(long)]
+    port: Option<u16>,
+    #[arg(long)]
+    ips: Option<Vec<IpAddr>>,
+    #[arg(long)]
+    enter_hook: Option<String>,
+}
+
+#[derive(Clone, Subcommand, Debug, PartialEq, Eq)]
+enum CliSubcommand {
+    /// add a new client
+    AddClient(Client),
+    /// remove an existing client
+    RemoveClient { id: ClientHandle },
+    /// activate a client
+    Activate { id: ClientHandle },
+    /// deactivate a client
+    Deactivate { id: ClientHandle },
+    /// list configured clients
+    List,
+    /// change hostname
+    SetHost {
+        id: ClientHandle,
+        host: Option<String>,
+    },
+    /// change port
+    SetPort { id: ClientHandle, port: u16 },
+    /// set position
+    SetPosition { id: ClientHandle, pos: Position },
+    /// set ips
+    SetIps { id: ClientHandle, ips: Vec<IpAddr> },
+    /// re-enable capture
+    EnableCapture,
+    /// re-enable emulation
+    EnableEmulation,
+    /// authorize a public key
+    AuthorizeKey {
+        description: String,
+        sha256_fingerprint: String,
+    },
+    /// deauthorize a public key
+    RemoveAuthorizedKey { sha256_fingerprint: String },
+}
+
+pub async fn run(args: CliArgs) -> Result<(), CliError> {
+    execute(args.command).await?;
     Ok(())
 }
 
-struct Cli {
-    clients: Vec<(ClientHandle, ClientConfig, ClientState)>,
-    changed: Option<ClientHandle>,
-    rx: AsyncFrontendEventReader,
-    tx: AsyncFrontendRequestWriter,
-}
-
-impl Cli {
-    fn new(rx: AsyncFrontendEventReader, tx: AsyncFrontendRequestWriter) -> Cli {
-        Self {
-            clients: vec![],
-            changed: None,
-            rx,
-            tx,
-        }
-    }
-
-    async fn run(&mut self) -> Result<(), IpcError> {
-        let stdin = tokio::io::stdin();
-        let stdin = BufReader::new(stdin);
-        let mut stdin = stdin.lines();
-
-        /* initial state sync */
-        self.clients = loop {
-            match self.rx.next().await {
-                Some(Ok(e)) => {
-                    if let FrontendEvent::Enumerate(clients) = e {
-                        break clients;
+async fn execute(cmd: CliSubcommand) -> Result<(), CliError> {
+    let (mut rx, mut tx) = connect_async(Some(Duration::from_millis(500))).await?;
+    match cmd {
+        CliSubcommand::AddClient(Client {
+            hostname,
+            port,
+            ips,
+            enter_hook,
+        }) => {
+            tx.request(FrontendRequest::Create).await?;
+            while let Some(e) = rx.next().await {
+                if let FrontendEvent::Created(handle, _, _) = e? {
+                    if let Some(hostname) = hostname {
+                        tx.request(FrontendRequest::UpdateHostname(handle, Some(hostname)))
+                            .await?;
                     }
-                }
-                Some(Err(e)) => return Err(e),
-                None => return Ok(()),
-            }
-        };
-
-        loop {
-            prompt()?;
-            tokio::select! {
-                line = stdin.next_line() => {
-                    let Some(line) = line? else {
-                        break Ok(());
-                    };
-                    let cmd: Command = match line.parse() {
-                        Ok(cmd) => cmd,
-                        Err(e) => {
-                            eprintln!("{e}");
-                            continue;
-                        }
-                    };
-                    self.execute(cmd).await?;
-                }
-                event = self.rx.next() => {
-                    if let Some(event) = event {
-                        self.handle_event(event?);
-                    } else {
-                        break Ok(());
+                    if let Some(port) = port {
+                        tx.request(FrontendRequest::UpdatePort(handle, port))
+                            .await?;
                     }
-                }
-            }
-            if let Some(handle) = self.changed.take() {
-                self.update_client(handle).await?;
-            }
-        }
-    }
-
-    async fn update_client(&mut self, handle: ClientHandle) -> Result<(), IpcError> {
-        self.tx.request(FrontendRequest::GetState(handle)).await?;
-        while let Some(Ok(event)) = self.rx.next().await {
-            self.handle_event(event.clone());
-            if let FrontendEvent::State(_, _, _) | FrontendEvent::NoSuchClient(_) = event {
-                break;
-            }
-        }
-        Ok(())
-    }
-
-    async fn execute(&mut self, cmd: Command) -> Result<(), IpcError> {
-        match cmd {
-            Command::None => {}
-            Command::Connect(pos, host, port) => {
-                let request = FrontendRequest::Create;
-                self.tx.request(request).await?;
-                let handle = loop {
-                    if let Some(Ok(event)) = self.rx.next().await {
-                        match event {
-                            FrontendEvent::Created(h, c, s) => {
-                                self.clients.push((h, c, s));
-                                break h;
-                            }
-                            _ => {
-                                self.handle_event(event);
-                                continue;
-                            }
-                        }
+                    if let Some(ips) = ips {
+                        tx.request(FrontendRequest::UpdateFixIps(handle, ips))
+                            .await?;
                     }
-                };
-                for request in [
-                    FrontendRequest::UpdateHostname(handle, Some(host.clone())),
-                    FrontendRequest::UpdatePort(handle, port.unwrap_or(DEFAULT_PORT)),
-                    FrontendRequest::UpdatePosition(handle, pos),
-                ] {
-                    self.tx.request(request).await?;
-                }
-                self.update_client(handle).await?;
-            }
-            Command::Disconnect(id) => {
-                self.tx.request(FrontendRequest::Delete(id)).await?;
-                loop {
-                    if let Some(Ok(event)) = self.rx.next().await {
-                        self.handle_event(event.clone());
-                        if let FrontendEvent::Deleted(_) = event {
-                            self.handle_event(event);
-                            break;
-                        }
+                    if let Some(enter_hook) = enter_hook {
+                        tx.request(FrontendRequest::UpdateEnterHook(handle, Some(enter_hook)))
+                            .await?;
                     }
-                }
-            }
-            Command::Activate(id) => {
-                self.tx.request(FrontendRequest::Activate(id, true)).await?;
-                self.update_client(id).await?;
-            }
-            Command::Deactivate(id) => {
-                self.tx
-                    .request(FrontendRequest::Activate(id, false))
-                    .await?;
-                self.update_client(id).await?;
-            }
-            Command::List => {
-                self.tx.request(FrontendRequest::Enumerate()).await?;
-                while let Some(e) = self.rx.next().await {
-                    let event = e?;
-                    self.handle_event(event.clone());
-                    if let FrontendEvent::Enumerate(_) = event {
-                        break;
-                    }
-                }
-            }
-            Command::SetHost(handle, host) => {
-                let request = FrontendRequest::UpdateHostname(handle, Some(host.clone()));
-                self.tx.request(request).await?;
-                self.update_client(handle).await?;
-            }
-            Command::SetPort(handle, port) => {
-                let request = FrontendRequest::UpdatePort(handle, port.unwrap_or(DEFAULT_PORT));
-                self.tx.request(request).await?;
-                self.update_client(handle).await?;
-            }
-            Command::Help => {
-                for cmd_type in [
-                    CommandType::List,
-                    CommandType::Connect,
-                    CommandType::Disconnect,
-                    CommandType::Activate,
-                    CommandType::Deactivate,
-                    CommandType::SetHost,
-                    CommandType::SetPort,
-                ] {
-                    eprintln!("{}", cmd_type.usage());
+                    break;
                 }
             }
         }
-        Ok(())
-    }
-
-    fn find_mut(
-        &mut self,
-        handle: ClientHandle,
-    ) -> Option<&mut (ClientHandle, ClientConfig, ClientState)> {
-        self.clients.iter_mut().find(|(h, _, _)| *h == handle)
-    }
-
-    fn remove(
-        &mut self,
-        handle: ClientHandle,
-    ) -> Option<(ClientHandle, ClientConfig, ClientState)> {
-        let idx = self.clients.iter().position(|(h, _, _)| *h == handle);
-        idx.map(|i| self.clients.swap_remove(i))
-    }
-
-    fn handle_event(&mut self, event: FrontendEvent) {
-        match event {
-            FrontendEvent::Changed(h) => self.changed = Some(h),
-            FrontendEvent::Created(h, c, s) => {
-                eprint!("client added ({h}): ");
-                print_config(&c);
-                eprint!(" ");
-                print_state(&s);
-                eprintln!();
-                self.clients.push((h, c, s));
-            }
-            FrontendEvent::NoSuchClient(h) => {
-                eprintln!("no such client: {h}");
-            }
-            FrontendEvent::State(h, c, s) => {
-                if let Some((_, config, state)) = self.find_mut(h) {
-                    let old_host = config.hostname.clone().unwrap_or("\"\"".into());
-                    let new_host = c.hostname.clone().unwrap_or("\"\"".into());
-                    if old_host != new_host {
-                        eprintln!(
-                            "client {h}: hostname updated ({} -> {})",
-                            old_host, new_host
+        CliSubcommand::RemoveClient { id } => tx.request(FrontendRequest::Delete(id)).await?,
+        CliSubcommand::Activate { id } => tx.request(FrontendRequest::Activate(id, true)).await?,
+        CliSubcommand::Deactivate { id } => {
+            tx.request(FrontendRequest::Activate(id, false)).await?
+        }
+        CliSubcommand::List => {
+            tx.request(FrontendRequest::Enumerate()).await?;
+            while let Some(e) = rx.next().await {
+                if let FrontendEvent::Enumerate(clients) = e? {
+                    for (handle, config, state) in clients {
+                        let host = config.hostname.unwrap_or("unknown".to_owned());
+                        let port = config.port;
+                        let pos = config.pos;
+                        let active = state.active;
+                        let ips = state.ips;
+                        println!(
+                            "id {handle}: {host}:{port} ({pos}) active: {active}, ips: {ips:?}"
                         );
                     }
-                    if config.port != c.port {
-                        eprintln!("client {h} changed port: {} -> {}", config.port, c.port);
-                    }
-                    if config.fix_ips != c.fix_ips {
-                        eprintln!("client {h} ips updated: {:?}", c.fix_ips)
-                    }
-                    *config = c;
-                    if state.active ^ s.active {
-                        eprintln!(
-                            "client {h} {}",
-                            if s.active { "activated" } else { "deactivated" }
-                        );
-                    }
-                    *state = s;
+                    break;
                 }
             }
-            FrontendEvent::Deleted(h) => {
-                if let Some((h, c, _)) = self.remove(h) {
-                    eprint!("client {h} removed (");
-                    print_config(&c);
-                    eprintln!(")");
-                }
-            }
-            FrontendEvent::PortChanged(p, e) => {
-                if let Some(e) = e {
-                    eprintln!("failed to change port: {e}");
-                } else {
-                    eprintln!("changed port to {p}");
-                }
-            }
-            FrontendEvent::Enumerate(clients) => {
-                self.clients = clients;
-                self.print_clients();
-            }
-            FrontendEvent::Error(e) => {
-                eprintln!("ERROR: {e}");
-            }
-            FrontendEvent::CaptureStatus(s) => {
-                eprintln!("capture status: {s:?}")
-            }
-            FrontendEvent::EmulationStatus(s) => {
-                eprintln!("emulation status: {s:?}")
-            }
-            FrontendEvent::AuthorizedUpdated(fingerprints) => {
-                eprintln!("authorized keys changed:");
-                for (desc, fp) in fingerprints {
-                    eprintln!("{desc}: {fp}");
-                }
-            }
-            FrontendEvent::PublicKeyFingerprint(fp) => {
-                eprintln!("the public key fingerprint of this device is {fp}");
-            }
-            FrontendEvent::IncomingConnected(..) => {}
-            FrontendEvent::IncomingDisconnected(..) => {}
+        }
+        CliSubcommand::SetHost { id, host } => {
+            tx.request(FrontendRequest::UpdateHostname(id, host))
+                .await?
+        }
+        CliSubcommand::SetPort { id, port } => {
+            tx.request(FrontendRequest::UpdatePort(id, port)).await?
+        }
+        CliSubcommand::SetPosition { id, pos } => {
+            tx.request(FrontendRequest::UpdatePosition(id, pos)).await?
+        }
+        CliSubcommand::SetIps { id, ips } => {
+            tx.request(FrontendRequest::UpdateFixIps(id, ips)).await?
+        }
+        CliSubcommand::EnableCapture => tx.request(FrontendRequest::EnableCapture).await?,
+        CliSubcommand::EnableEmulation => tx.request(FrontendRequest::EnableEmulation).await?,
+        CliSubcommand::AuthorizeKey {
+            description,
+            sha256_fingerprint,
+        } => {
+            tx.request(FrontendRequest::AuthorizeKey(
+                description,
+                sha256_fingerprint,
+            ))
+            .await?
+        }
+        CliSubcommand::RemoveAuthorizedKey { sha256_fingerprint } => {
+            tx.request(FrontendRequest::RemoveAuthorizedKey(sha256_fingerprint))
+                .await?
         }
     }
-
-    fn print_clients(&mut self) {
-        for (h, c, s) in self.clients.iter() {
-            eprint!("client {h}: ");
-            print_config(c);
-            eprint!(" ");
-            print_state(s);
-            eprintln!();
-        }
-    }
-}
-
-fn prompt() -> io::Result<()> {
-    eprint!("lan-mouse > ");
-    std::io::stderr().flush()?;
     Ok(())
 }
-
-fn print_config(c: &ClientConfig) {
-    eprint!(
-        "{}:{} ({}), ips: {:?}",
-        c.hostname.clone().unwrap_or("(no hostname)".into()),
-        c.port,
-        c.pos,
-        c.fix_ips
-    );
-}
-
-fn print_state(s: &ClientState) {
-    eprint!("active: {}, dns: {:?}", s.active, s.ips);
-}

lan-mouse-gtk/Cargo.toml

@@ -13,6 +13,7 @@ async-channel = { version = "2.1.1" }
 hostname = "0.4.0"
 log = "0.4.20"
 lan-mouse-ipc = { path = "../lan-mouse-ipc", version = "0.2.0" }
+thiserror = "2.0.0"
 
 [build-dependencies]
 glib-build-tools = { version = "0.20.0" }

lan-mouse-gtk/resources/client_row.ui

@@ -5,7 +5,6 @@
 		<!-- enabled -->
 		<child type="prefix">
 			<object class="GtkSwitch" id="enable_switch">
-				<signal name="state_set" handler="handle_client_set_state" swapped="true"/>
 				<property name="valign">center</property>
 				<property name="halign">end</property>
 				<property name="tooltip-text" translatable="yes">enable</property>

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

@@ -13,7 +13,7 @@ use super::ClientData;
 #[properties(wrapper_type = super::ClientObject)]
 pub struct ClientObject {
     #[property(name = "handle", get, set, type = ClientHandle, member = handle)]
-    #[property(name = "hostname", get, set, type = String, member = hostname)]
+    #[property(name = "hostname", get, set, type = Option<String>, member = hostname)]
     #[property(name = "port", get, set, type = u32, member = port, maximum = u16::MAX as u32)]
     #[property(name = "active", get, set, type = bool, member = active)]
     #[property(name = "position", get, set, type = String, member = position)]

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::DEFAULT_PORT;
+use lan_mouse_ipc::{Position, DEFAULT_PORT};
 
 use super::ClientObject;
 
@@ -15,25 +15,32 @@ glib::wrapper! {
 }
 
 impl ClientRow {
-    pub fn new(_client_object: &ClientObject) -> Self {
-        Object::builder().build()
+    pub fn new(client_object: &ClientObject) -> Self {
+        let client_row: Self = Object::builder().build();
+        client_row
+            .imp()
+            .client_object
+            .borrow_mut()
+            .replace(client_object.clone());
+        client_row
     }
 
     pub fn bind(&self, client_object: &ClientObject) {
         let mut bindings = self.imp().bindings.borrow_mut();
 
+        // bind client active to switch state
         let active_binding = client_object
             .bind_property("active", &self.imp().enable_switch.get(), "state")
-            .bidirectional()
             .sync_create()
             .build();
 
+        // bind client active to switch position
         let switch_position_binding = client_object
             .bind_property("active", &self.imp().enable_switch.get(), "active")
-            .bidirectional()
             .sync_create()
             .build();
 
+        // bind hostname to hostname edit field
         let hostname_binding = client_object
             .bind_property("hostname", &self.imp().hostname.get(), "text")
             .transform_to(|_, v: Option<String>| {
@@ -43,72 +50,48 @@ impl ClientRow {
                     Some("".to_string())
                 }
             })
-            .transform_from(|_, v: String| {
-                if v.as_str().trim() == "" {
-                    Some(None)
-                } else {
-                    Some(Some(v))
-                }
-            })
-            .bidirectional()
             .sync_create()
             .build();
 
+        // bind hostname to title
         let title_binding = client_object
             .bind_property("hostname", self, "title")
-            .transform_to(|_, v: Option<String>| {
-                if let Some(hostname) = v {
-                    Some(hostname)
-                } else {
-                    Some("<span font_style=\"italic\" font_weight=\"light\" foreground=\"darkgrey\">no hostname!</span>".to_string())
-                }
-            })
+            .transform_to(|_, v: Option<String>| v.or(Some("<span font_style=\"italic\" font_weight=\"light\" foreground=\"darkgrey\">no hostname!</span>".to_string())))
             .sync_create()
             .build();
 
+        // bind port to port edit field
         let port_binding = client_object
             .bind_property("port", &self.imp().port.get(), "text")
-            .transform_from(|_, v: String| {
-                if v.is_empty() {
-                    Some(DEFAULT_PORT as u32)
-                } else {
-                    Some(v.parse::<u16>().unwrap_or(DEFAULT_PORT) as u32)
-                }
-            })
             .transform_to(|_, v: u32| {
-                if v == 4242 {
+                if v == DEFAULT_PORT as u32 {
                     Some("".to_string())
                 } else {
                     Some(v.to_string())
                 }
             })
-            .bidirectional()
             .sync_create()
             .build();
 
+        // bind port to subtitle
         let subtitle_binding = client_object
             .bind_property("port", self, "subtitle")
             .sync_create()
             .build();
 
+        // bind position to selected position
         let position_binding = client_object
             .bind_property("position", &self.imp().position.get(), "selected")
-            .transform_from(|_, v: u32| match v {
-                1 => Some("right"),
-                2 => Some("top"),
-                3 => Some("bottom"),
-                _ => Some("left"),
-            })
             .transform_to(|_, v: String| match v.as_str() {
-                "right" => Some(1),
+                "right" => Some(1u32),
                 "top" => Some(2u32),
                 "bottom" => Some(3u32),
                 _ => Some(0u32),
             })
-            .bidirectional()
             .sync_create()
             .build();
 
+        // bind resolving status to spinner visibility
         let resolve_binding = client_object
             .bind_property(
                 "resolving",
@@ -118,6 +101,7 @@ impl ClientRow {
             .sync_create()
             .build();
 
+        // bind ips to tooltip-text
         let ip_binding = client_object
             .bind_property("ips", &self.imp().dns_button.get(), "tooltip-text")
             .transform_to(|_, ips: Vec<String>| {
@@ -146,4 +130,24 @@ impl ClientRow {
             binding.unbind();
         }
     }
+
+    pub fn set_active(&self, active: bool) {
+        self.imp().set_active(active);
+    }
+
+    pub fn set_hostname(&self, hostname: Option<String>) {
+        self.imp().set_hostname(hostname);
+    }
+
+    pub fn set_port(&self, port: u16) {
+        self.imp().set_port(port);
+    }
+
+    pub fn set_position(&self, pos: Position) {
+        self.imp().set_pos(pos);
+    }
+
+    pub fn set_dns_state(&self, resolved: bool) {
+        self.imp().set_dns_state(resolved);
+    }
 }

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

@@ -3,11 +3,14 @@ use std::cell::RefCell;
 use adw::subclass::prelude::*;
 use adw::{prelude::*, ActionRow, ComboRow};
 use glib::{subclass::InitializingObject, Binding};
-use gtk::glib::clone;
 use gtk::glib::subclass::Signal;
-use gtk::{glib, Button, CompositeTemplate, Switch};
+use gtk::glib::{clone, SignalHandlerId};
+use gtk::{glib, Button, CompositeTemplate, Entry, Switch};
+use lan_mouse_ipc::Position;
 use std::sync::OnceLock;
 
+use crate::client_object::ClientObject;
+
 #[derive(CompositeTemplate, Default)]
 #[template(resource = "/de/feschber/LanMouse/client_row.ui")]
 pub struct ClientRow {
@@ -28,6 +31,11 @@ pub struct ClientRow {
     #[template_child]
     pub dns_loading_indicator: TemplateChild<gtk::Spinner>,
     pub bindings: RefCell<Vec<Binding>>,
+    hostname_change_handler: RefCell<Option<SignalHandlerId>>,
+    port_change_handler: RefCell<Option<SignalHandlerId>>,
+    position_change_handler: RefCell<Option<SignalHandlerId>>,
+    set_state_handler: RefCell<Option<SignalHandlerId>>,
+    pub client_object: RefCell<Option<ClientObject>>,
 }
 
 #[glib::object_subclass]
@@ -59,17 +67,61 @@ impl ObjectImpl for ClientRow {
                 row.handle_client_delete(button);
             }
         ));
+        let handler = self.hostname.connect_changed(clone!(
+            #[weak(rename_to = row)]
+            self,
+            move |entry| {
+                row.handle_hostname_changed(entry);
+            }
+        ));
+        self.hostname_change_handler.replace(Some(handler));
+        let handler = self.port.connect_changed(clone!(
+            #[weak(rename_to = row)]
+            self,
+            move |entry| {
+                row.handle_port_changed(entry);
+            }
+        ));
+        self.port_change_handler.replace(Some(handler));
+        let handler = self.position.connect_selected_notify(clone!(
+            #[weak(rename_to = row)]
+            self,
+            move |position| {
+                row.handle_position_changed(position);
+            }
+        ));
+        self.position_change_handler.replace(Some(handler));
+        let handler = self.enable_switch.connect_state_set(clone!(
+            #[weak(rename_to = row)]
+            self,
+            #[upgrade_or]
+            glib::Propagation::Proceed,
+            move |switch, state| {
+                row.handle_activate_switch(state, switch);
+                glib::Propagation::Proceed
+            }
+        ));
+        self.set_state_handler.replace(Some(handler));
     }
 
     fn signals() -> &'static [glib::subclass::Signal] {
         static SIGNALS: OnceLock<Vec<Signal>> = OnceLock::new();
         SIGNALS.get_or_init(|| {
             vec![
-                Signal::builder("request-dns").build(),
-                Signal::builder("request-update")
+                Signal::builder("request-activate")
                     .param_types([bool::static_type()])
                     .build(),
                 Signal::builder("request-delete").build(),
+                Signal::builder("request-dns").build(),
+                Signal::builder("request-hostname-change")
+                    .param_types([String::static_type()])
+                    .build(),
+                Signal::builder("request-port-change")
+                    .param_types([u32::static_type()])
+                    .build(),
+                Signal::builder("request-position-change")
+                    .param_types([u32::static_type()])
+                    .build(),
             ]
         })
     }
@@ -78,22 +130,97 @@ impl ObjectImpl for ClientRow {
 #[gtk::template_callbacks]
 impl ClientRow {
     #[template_callback]
-    fn handle_client_set_state(&self, state: bool, _switch: &Switch) -> bool {
-        log::debug!("state change -> requesting update");
-        self.obj().emit_by_name::<()>("request-update", &[&state]);
+    fn handle_activate_switch(&self, state: bool, _switch: &Switch) -> bool {
+        self.obj().emit_by_name::<()>("request-activate", &[&state]);
         true // dont run default handler
     }
 
     #[template_callback]
-    fn handle_request_dns(&self, _: Button) {
+    fn handle_request_dns(&self, _: &Button) {
         self.obj().emit_by_name::<()>("request-dns", &[]);
     }
 
     #[template_callback]
     fn handle_client_delete(&self, _button: &Button) {
-        log::debug!("delete button pressed -> requesting delete");
         self.obj().emit_by_name::<()>("request-delete", &[]);
     }
+
+    fn handle_port_changed(&self, port_entry: &Entry) {
+        if let Ok(port) = port_entry.text().parse::<u16>() {
+            self.obj()
+                .emit_by_name::<()>("request-port-change", &[&(port as u32)]);
+        }
+    }
+
+    fn handle_hostname_changed(&self, hostname_entry: &Entry) {
+        self.obj()
+            .emit_by_name::<()>("request-hostname-change", &[&hostname_entry.text()]);
+    }
+
+    fn handle_position_changed(&self, position: &ComboRow) {
+        self.obj()
+            .emit_by_name("request-position-change", &[&position.selected()])
+    }
+
+    pub(super) fn set_hostname(&self, hostname: Option<String>) {
+        let position = self.hostname.position();
+        let handler = self.hostname_change_handler.borrow();
+        let handler = handler.as_ref().expect("signal handler");
+        self.hostname.block_signal(handler);
+        self.client_object
+            .borrow_mut()
+            .as_mut()
+            .expect("client object")
+            .set_property("hostname", hostname);
+        self.hostname.unblock_signal(handler);
+        self.hostname.set_position(position);
+    }
+
+    pub(super) fn set_port(&self, port: u16) {
+        let position = self.port.position();
+        let handler = self.port_change_handler.borrow();
+        let handler = handler.as_ref().expect("signal handler");
+        self.port.block_signal(handler);
+        self.client_object
+            .borrow_mut()
+            .as_mut()
+            .expect("client object")
+            .set_port(port as u32);
+        self.port.unblock_signal(handler);
+        self.port.set_position(position);
+    }
+
+    pub(super) fn set_pos(&self, pos: Position) {
+        let handler = self.position_change_handler.borrow();
+        let handler = handler.as_ref().expect("signal handler");
+        self.position.block_signal(handler);
+        self.client_object
+            .borrow_mut()
+            .as_mut()
+            .expect("client object")
+            .set_position(pos.to_string());
+        self.position.unblock_signal(handler);
+    }
+
+    pub(super) fn set_active(&self, active: bool) {
+        let handler = self.set_state_handler.borrow();
+        let handler = handler.as_ref().expect("signal handler");
+        self.enable_switch.block_signal(handler);
+        self.client_object
+            .borrow_mut()
+            .as_mut()
+            .expect("client object")
+            .set_active(active);
+        self.enable_switch.unblock_signal(handler);
+    }
+
+    pub(super) fn set_dns_state(&self, resolved: bool) {
+        if resolved {
+            self.dns_button.set_css_classes(&["success"])
+        } else {
+            self.dns_button.set_css_classes(&["warning"])
+        }
+    }
 }
 
 impl WidgetImpl for ClientRow {}

lan-mouse-gtk/src/lib.rs

@@ -9,18 +9,24 @@ use std::{env, process, str};
 
 use window::Window;
 
-use lan_mouse_ipc::{FrontendEvent, FrontendRequest};
+use lan_mouse_ipc::FrontendEvent;
 
 use adw::Application;
-use gtk::{
-    gdk::Display, glib::clone, prelude::*, subclass::prelude::ObjectSubclassIsExt, IconTheme,
-};
+use gtk::{gdk::Display, glib::clone, prelude::*, IconTheme};
 use gtk::{gio, glib, prelude::ApplicationExt};
 
 use self::client_object::ClientObject;
 use self::key_object::KeyObject;
 
-pub fn run() -> glib::ExitCode {
+use thiserror::Error;
+
+#[derive(Error, Debug)]
+pub enum GtkError {
+    #[error("gtk frontend exited with non zero exit code: {0}")]
+    NonZeroExitCode(i32),
+}
+
+pub fn run() -> Result<(), GtkError> {
     log::debug!("running gtk frontend");
     #[cfg(windows)]
     let ret = std::thread::Builder::new()
@@ -33,13 +39,10 @@ pub fn run() -> glib::ExitCode {
     #[cfg(not(windows))]
     let ret = gtk_main();
 
-    if ret == glib::ExitCode::FAILURE {
-        log::error!("frontend exited with failure");
-    } else {
-        log::info!("frontend exited successfully");
+    match ret {
+        glib::ExitCode::SUCCESS => Ok(()),
+        e => Err(GtkError::NonZeroExitCode(e.value())),
     }
-
-    ret
 }
 
 fn gtk_main() -> glib::ExitCode {
@@ -127,54 +130,28 @@ fn build_ui(app: &Application) {
             loop {
                 let notify = receiver.recv().await.unwrap_or_else(|_| process::exit(1));
                 match notify {
-                    FrontendEvent::Changed(handle) => {
-                        window.request(FrontendRequest::GetState(handle));
-                    }
                     FrontendEvent::Created(handle, client, state) => {
-                        window.new_client(handle, client, state);
-                    }
-                    FrontendEvent::Deleted(client) => {
-                        window.delete_client(client);
+                        window.new_client(handle, client, state)
                     }
+                    FrontendEvent::Deleted(client) => window.delete_client(client),
                     FrontendEvent::State(handle, config, state) => {
                         window.update_client_config(handle, config);
                         window.update_client_state(handle, state);
                     }
                     FrontendEvent::NoSuchClient(_) => {}
-                    FrontendEvent::Error(e) => {
-                        window.show_toast(e.as_str());
+                    FrontendEvent::Error(e) => window.show_toast(e.as_str()),
+                    FrontendEvent::Enumerate(clients) => window.update_client_list(clients),
+                    FrontendEvent::PortChanged(port, msg) => window.update_port(port, msg),
+                    FrontendEvent::CaptureStatus(s) => window.set_capture(s.into()),
+                    FrontendEvent::EmulationStatus(s) => window.set_emulation(s.into()),
+                    FrontendEvent::AuthorizedUpdated(keys) => window.set_authorized_keys(keys),
+                    FrontendEvent::PublicKeyFingerprint(fp) => window.set_pk_fp(&fp),
+                    FrontendEvent::IncomingConnected(_fingerprint, addr, pos) => {
+                        window.show_toast(format!("device connected: {addr} ({pos})").as_str());
                     }
-                    FrontendEvent::Enumerate(clients) => {
-                        for (handle, client, state) in clients {
-                            if window.client_idx(handle).is_some() {
-                                window.update_client_config(handle, client);
-                                window.update_client_state(handle, state);
-                            } else {
-                                window.new_client(handle, client, state);
-                            }
-                        }
+                    FrontendEvent::IncomingDisconnected(addr) => {
+                        window.show_toast(format!("{addr} disconnected").as_str());
                     }
-                    FrontendEvent::PortChanged(port, msg) => {
-                        match msg {
-                            None => window.show_toast(format!("port changed: {port}").as_str()),
-                            Some(msg) => window.show_toast(msg.as_str()),
-                        }
-                        window.imp().set_port(port);
-                    }
-                    FrontendEvent::CaptureStatus(s) => {
-                        window.set_capture(s.into());
-                    }
-                    FrontendEvent::EmulationStatus(s) => {
-                        window.set_emulation(s.into());
-                    }
-                    FrontendEvent::AuthorizedUpdated(keys) => {
-                        window.set_authorized_keys(keys);
-                    }
-                    FrontendEvent::PublicKeyFingerprint(fp) => {
-                        window.set_pk_fp(&fp);
-                    }
-                    FrontendEvent::IncomingConnected(..) => {}
-                    FrontendEvent::IncomingDisconnected(..) => {}
                 }
             }
         }

lan-mouse-gtk/src/window.rs

@@ -8,7 +8,7 @@ use glib::{clone, Object};
 use gtk::{
     gio,
     glib::{self, closure_local},
-    ListBox, NoSelection,
+    NoSelection,
 };
 
 use lan_mouse_ipc::{
@@ -28,7 +28,7 @@ glib::wrapper! {
 }
 
 impl Window {
-    pub(crate) fn new(app: &adw::Application, conn: FrontendRequestWriter) -> Self {
+    pub(super) fn new(app: &adw::Application, conn: FrontendRequestWriter) -> Self {
         let window: Self = Object::builder().property("application", app).build();
         window
             .imp()
@@ -38,7 +38,7 @@ impl Window {
         window
     }
 
-    pub fn clients(&self) -> gio::ListStore {
+    fn clients(&self) -> gio::ListStore {
         self.imp()
             .clients
             .borrow()
@@ -46,7 +46,7 @@ impl Window {
             .expect("Could not get clients")
     }
 
-    pub fn authorized(&self) -> gio::ListStore {
+    fn authorized(&self) -> gio::ListStore {
         self.imp()
             .authorized
             .borrow()
@@ -62,6 +62,14 @@ impl Window {
         self.authorized().item(idx).map(|o| o.downcast().unwrap())
     }
 
+    fn row_by_idx(&self, idx: i32) -> Option<ClientRow> {
+        self.imp()
+            .client_list
+            .get()
+            .row_at_index(idx)
+            .map(|o| o.downcast().expect("expected ClientRow"))
+    }
+
     fn setup_authorized(&self) {
         let store = gio::ListStore::new::<KeyObject>();
         self.imp().authorized.replace(Some(store));
@@ -112,16 +120,57 @@ impl Window {
                         .expect("Expected object of type `ClientObject`.");
                     let row = window.create_client_row(client_object);
                     row.connect_closure(
-                        "request-update",
+                        "request-hostname-change",
+                        false,
+                        closure_local!(
+                            #[strong]
+                            window,
+                            move |row: ClientRow, hostname: String| {
+                                log::debug!("request-hostname-change");
+                                if let Some(client) = window.client_by_idx(row.index() as u32) {
+                                    let hostname = Some(hostname).filter(|s| !s.is_empty());
+                                    /* changed in response to FrontendEvent
+                                     * -> do not request additional update */
+                                    window.request(FrontendRequest::UpdateHostname(
+                                        client.handle(),
+                                        hostname,
+                                    ));
+                                }
+                            }
+                        ),
+                    );
+                    row.connect_closure(
+                        "request-port-change",
+                        false,
+                        closure_local!(
+                            #[strong]
+                            window,
+                            move |row: ClientRow, port: u32| {
+                                if let Some(client) = window.client_by_idx(row.index() as u32) {
+                                    window.request(FrontendRequest::UpdatePort(
+                                        client.handle(),
+                                        port as u16,
+                                    ));
+                                }
+                            }
+                        ),
+                    );
+                    row.connect_closure(
+                        "request-activate",
                         false,
                         closure_local!(
                             #[strong]
                             window,
                             move |row: ClientRow, active: bool| {
                                 if let Some(client) = window.client_by_idx(row.index() as u32) {
-                                    window.request_client_activate(&client, active);
-                                    window.request_client_update(&client);
-                                    window.request_client_state(&client);
+                                    log::debug!(
+                                        "request: {} client",
+                                        if active { "activating" } else { "deactivating" }
+                                    );
+                                    window.request(FrontendRequest::Activate(
+                                        client.handle(),
+                                        active,
+                                    ));
                                 }
                             }
                         ),
@@ -134,7 +183,7 @@ impl Window {
                             window,
                             move |row: ClientRow| {
                                 if let Some(client) = window.client_by_idx(row.index() as u32) {
-                                    window.request_client_delete(&client);
+                                    window.request(FrontendRequest::Delete(client.handle()));
                                 }
                             }
                         ),
@@ -147,9 +196,31 @@ impl Window {
                             window,
                             move |row: ClientRow| {
                                 if let Some(client) = window.client_by_idx(row.index() as u32) {
-                                    window.request_client_update(&client);
-                                    window.request_dns(&client);
-                                    window.request_client_state(&client);
+                                    window.request(FrontendRequest::ResolveDns(
+                                        client.get_data().handle,
+                                    ));
+                                }
+                            }
+                        ),
+                    );
+                    row.connect_closure(
+                        "request-position-change",
+                        false,
+                        closure_local!(
+                            #[strong]
+                            window,
+                            move |row: ClientRow, pos_idx: u32| {
+                                if let Some(client) = window.client_by_idx(row.index() as u32) {
+                                    let position = match pos_idx {
+                                        0 => Position::Left,
+                                        1 => Position::Right,
+                                        2 => Position::Top,
+                                        _ => Position::Bottom,
+                                    };
+                                    window.request(FrontendRequest::UpdatePosition(
+                                        client.handle(),
+                                        position,
+                                    ));
                                 }
                             }
                         ),
@@ -160,10 +231,14 @@ impl Window {
         );
     }
 
+    fn setup_icon(&self) {
+        self.set_icon_name(Some("de.feschber.LanMouse"));
+    }
+
     /// workaround for a bug in libadwaita that shows an ugly line beneath
     /// the last element if a placeholder is set.
     /// https://gitlab.gnome.org/GNOME/gtk/-/merge_requests/6308
-    pub fn update_placeholder_visibility(&self) {
+    fn update_placeholder_visibility(&self) {
         let visible = self.clients().n_items() == 0;
         let placeholder = self.imp().client_placeholder.get();
         self.imp().client_list.set_placeholder(match visible {
@@ -172,7 +247,7 @@ impl Window {
         });
     }
 
-    pub fn update_auth_placeholder_visibility(&self) {
+    fn update_auth_placeholder_visibility(&self) {
         let visible = self.authorized().n_items() == 0;
         let placeholder = self.imp().authorized_placeholder.get();
         self.imp().authorized_list.set_placeholder(match visible {
@@ -181,10 +256,6 @@ impl Window {
         });
     }
 
-    fn setup_icon(&self) {
-        self.set_icon_name(Some("de.feschber.LanMouse"));
-    }
-
     fn create_client_row(&self, client_object: &ClientObject) -> ClientRow {
         let row = ClientRow::new(client_object);
         row.bind(client_object);
@@ -197,24 +268,46 @@ impl Window {
         row
     }
 
-    pub fn new_client(&self, handle: ClientHandle, client: ClientConfig, state: ClientState) {
+    pub(super) fn new_client(
+        &self,
+        handle: ClientHandle,
+        client: ClientConfig,
+        state: ClientState,
+    ) {
         let client = ClientObject::new(handle, client, state.clone());
         self.clients().append(&client);
         self.update_placeholder_visibility();
         self.update_dns_state(handle, !state.ips.is_empty());
     }
 
-    pub fn client_idx(&self, handle: ClientHandle) -> Option<usize> {
-        self.clients().iter::<ClientObject>().position(|c| {
-            if let Ok(c) = c {
-                c.handle() == handle
+    pub(super) fn update_client_list(
+        &self,
+        clients: Vec<(ClientHandle, ClientConfig, ClientState)>,
+    ) {
+        for (handle, client, state) in clients {
+            if self.client_idx(handle).is_some() {
+                self.update_client_config(handle, client);
+                self.update_client_state(handle, state);
             } else {
-                false
+                self.new_client(handle, client, state);
             }
-        })
+        }
     }
 
-    pub fn delete_client(&self, handle: ClientHandle) {
+    pub(super) fn update_port(&self, port: u16, msg: Option<String>) {
+        if let Some(msg) = msg {
+            self.show_toast(msg.as_str());
+        }
+        self.imp().set_port(port);
+    }
+
+    fn client_idx(&self, handle: ClientHandle) -> Option<usize> {
+        self.clients()
+            .iter::<ClientObject>()
+            .position(|c| c.ok().map(|c| c.handle() == handle).unwrap_or_default())
+    }
+
+    pub(super) fn delete_client(&self, handle: ClientHandle) {
         let Some(idx) = self.client_idx(handle) else {
             log::warn!("could not find client with handle {handle}");
             return;
@@ -226,46 +319,31 @@ impl Window {
         }
     }
 
-    pub fn update_client_config(&self, handle: ClientHandle, client: ClientConfig) {
-        let Some(idx) = self.client_idx(handle) else {
-            log::warn!("could not find client with handle {}", handle);
+    pub(super) fn update_client_config(&self, handle: ClientHandle, client: ClientConfig) {
+        let Some(row) = self.row_for_handle(handle) else {
+            log::warn!("could not find row for handle {}", handle);
             return;
         };
-        let client_object = self.clients().item(idx as u32).unwrap();
-        let client_object: &ClientObject = client_object.downcast_ref().unwrap();
-        let data = client_object.get_data();
-
-        /* only change if it actually has changed, otherwise
-         * the update signal is triggered */
-        if data.hostname != client.hostname {
-            client_object.set_hostname(client.hostname.unwrap_or("".into()));
-        }
-        if data.port != client.port as u32 {
-            client_object.set_port(client.port as u32);
-        }
-        if data.position != client.pos.to_string() {
-            client_object.set_position(client.pos.to_string());
-        }
+        row.set_hostname(client.hostname);
+        row.set_port(client.port);
+        row.set_position(client.pos);
     }
 
-    pub fn update_client_state(&self, handle: ClientHandle, state: ClientState) {
-        let Some(idx) = self.client_idx(handle) else {
-            log::warn!("could not find client with handle {}", handle);
+    pub(super) fn update_client_state(&self, handle: ClientHandle, state: ClientState) {
+        let Some(row) = self.row_for_handle(handle) else {
+            log::warn!("could not find row for handle {}", handle);
+            return;
+        };
+        let Some(client_object) = self.client_object_for_handle(handle) else {
+            log::warn!("could not find row for handle {}", handle);
             return;
         };
-        let client_object = self.clients().item(idx as u32).unwrap();
-        let client_object: &ClientObject = client_object.downcast_ref().unwrap();
-        let data = client_object.get_data();
 
-        if state.active != data.active {
-            client_object.set_active(state.active);
-            log::debug!("set active to {}", state.active);
-        }
+        /* activation state */
+        row.set_active(state.active);
 
-        if state.resolving != data.resolving {
-            client_object.set_resolving(state.resolving);
-            log::debug!("resolving {}: {}", data.handle, state.resolving);
-        }
+        /* dns state */
+        client_object.set_resolving(state.resolving);
 
         self.update_dns_state(handle, !state.ips.is_empty());
         let ips = state
@@ -276,22 +354,23 @@ impl Window {
         client_object.set_ips(ips);
     }
 
-    pub fn update_dns_state(&self, handle: ClientHandle, resolved: bool) {
-        let Some(idx) = self.client_idx(handle) else {
-            log::warn!("could not find client with handle {}", handle);
-            return;
-        };
-        let list_box: ListBox = self.imp().client_list.get();
-        let row = list_box.row_at_index(idx as i32).unwrap();
-        let client_row: ClientRow = row.downcast().expect("expected ClientRow Object");
-        if resolved {
-            client_row.imp().dns_button.set_css_classes(&["success"])
-        } else {
-            client_row.imp().dns_button.set_css_classes(&["warning"])
+    fn client_object_for_handle(&self, handle: ClientHandle) -> Option<ClientObject> {
+        self.client_idx(handle)
+            .and_then(|i| self.client_by_idx(i as u32))
+    }
+
+    fn row_for_handle(&self, handle: ClientHandle) -> Option<ClientRow> {
+        self.client_idx(handle)
+            .and_then(|i| self.row_by_idx(i as i32))
+    }
+
+    fn update_dns_state(&self, handle: ClientHandle, resolved: bool) {
+        if let Some(client_row) = self.row_for_handle(handle) {
+            client_row.set_dns_state(resolved);
         }
     }
 
-    pub fn request_port_change(&self) {
+    fn request_port_change(&self) {
         let port = self
             .imp()
             .port_entry
@@ -303,55 +382,19 @@ impl Window {
         self.request(FrontendRequest::ChangePort(port));
     }
 
-    pub fn request_capture(&self) {
+    fn request_capture(&self) {
         self.request(FrontendRequest::EnableCapture);
     }
 
-    pub fn request_emulation(&self) {
+    fn request_emulation(&self) {
         self.request(FrontendRequest::EnableEmulation);
     }
 
-    pub fn request_client_state(&self, client: &ClientObject) {
-        self.request_client_state_for(client.handle());
-    }
-
-    pub fn request_client_state_for(&self, handle: ClientHandle) {
-        self.request(FrontendRequest::GetState(handle));
-    }
-
-    pub fn request_client_create(&self) {
+    fn request_client_create(&self) {
         self.request(FrontendRequest::Create);
     }
 
-    pub fn request_dns(&self, client: &ClientObject) {
-        self.request(FrontendRequest::ResolveDns(client.get_data().handle));
-    }
-
-    pub fn request_client_update(&self, client: &ClientObject) {
-        let handle = client.handle();
-        let data = client.get_data();
-        let position = Position::try_from(data.position.as_str()).expect("invalid position");
-        let hostname = data.hostname;
-        let port = data.port as u16;
-
-        for event in [
-            FrontendRequest::UpdateHostname(handle, hostname),
-            FrontendRequest::UpdatePosition(handle, position),
-            FrontendRequest::UpdatePort(handle, port),
-        ] {
-            self.request(event);
-        }
-    }
-
-    pub fn request_client_activate(&self, client: &ClientObject, active: bool) {
-        self.request(FrontendRequest::Activate(client.handle(), active));
-    }
-
-    pub fn request_client_delete(&self, client: &ClientObject) {
-        self.request(FrontendRequest::Delete(client.handle()));
-    }
-
-    pub fn open_fingerprint_dialog(&self) {
+    fn open_fingerprint_dialog(&self) {
         let window = FingerprintWindow::new();
         window.set_transient_for(Some(self));
         window.connect_closure(
@@ -369,15 +412,15 @@ impl Window {
         window.present();
     }
 
-    pub fn request_fingerprint_add(&self, desc: String, fp: String) {
+    fn request_fingerprint_add(&self, desc: String, fp: String) {
         self.request(FrontendRequest::AuthorizeKey(desc, fp));
     }
 
-    pub fn request_fingerprint_remove(&self, fp: String) {
+    fn request_fingerprint_remove(&self, fp: String) {
         self.request(FrontendRequest::RemoveAuthorizedKey(fp));
     }
 
-    pub fn request(&self, request: FrontendRequest) {
+    fn request(&self, request: FrontendRequest) {
         let mut requester = self.imp().frontend_request_writer.borrow_mut();
         let requester = requester.as_mut().unwrap();
         if let Err(e) = requester.request(request) {
@@ -385,18 +428,18 @@ impl Window {
         };
     }
 
-    pub fn show_toast(&self, msg: &str) {
+    pub(super) fn show_toast(&self, msg: &str) {
         let toast = adw::Toast::new(msg);
         let toast_overlay = &self.imp().toast_overlay;
         toast_overlay.add_toast(toast);
     }
 
-    pub fn set_capture(&self, active: bool) {
+    pub(super) fn set_capture(&self, active: bool) {
         self.imp().capture_active.replace(active);
         self.update_capture_emulation_status();
     }
 
-    pub fn set_emulation(&self, active: bool) {
+    pub(super) fn set_emulation(&self, active: bool) {
         self.imp().emulation_active.replace(active);
         self.update_capture_emulation_status();
     }
@@ -411,7 +454,7 @@ impl Window {
             .set_visible(!capture || !emulation);
     }
 
-    pub(crate) fn set_authorized_keys(&self, fingerprints: HashMap<String, String>) {
+    pub(super) fn set_authorized_keys(&self, fingerprints: HashMap<String, String>) {
         let authorized = self.authorized();
         // clear list
         authorized.remove_all();
@@ -423,7 +466,7 @@ impl Window {
         self.update_auth_placeholder_visibility();
     }
 
-    pub(crate) fn set_pk_fp(&self, fingerprint: &str) {
+    pub(super) fn set_pk_fp(&self, fingerprint: &str) {
         self.imp().fingerprint_row.set_subtitle(fingerprint);
     }
 }

lan-mouse-ipc/src/connect_async.rs

@@ -1,7 +1,6 @@
 use crate::{ConnectionError, FrontendEvent, FrontendRequest, IpcError};
 use std::{
     cmp::min,
-    io,
     task::{ready, Poll},
     time::Duration,
 };
@@ -47,7 +46,7 @@ impl Stream for AsyncFrontendEventReader {
 }
 
 impl AsyncFrontendRequestWriter {
-    pub async fn request(&mut self, request: FrontendRequest) -> Result<(), io::Error> {
+    pub async fn request(&mut self, request: FrontendRequest) -> Result<(), IpcError> {
         let mut json = serde_json::to_string(&request).unwrap();
         log::debug!("requesting: {json}");
         json.push('\n');
@@ -57,8 +56,16 @@ impl AsyncFrontendRequestWriter {
 }
 
 pub async fn connect_async(
+    timeout: Option<Duration>,
 ) -> Result<(AsyncFrontendEventReader, AsyncFrontendRequestWriter), ConnectionError> {
-    let stream = wait_for_service().await?;
+    let stream = if let Some(duration) = timeout {
+        tokio::select! {
+            s = wait_for_service() => s?,
+            _ = tokio::time::sleep(duration) => return Err(ConnectionError::Timeout),
+        }
+    } else {
+        wait_for_service().await?
+    };
     #[cfg(unix)]
     let (rx, tx): (ReadHalf<UnixStream>, WriteHalf<UnixStream>) = tokio::io::split(stream);
     #[cfg(windows)]

lan-mouse-ipc/src/lib.rs

@@ -30,6 +30,8 @@ pub enum ConnectionError {
     SocketPath(#[from] SocketPathError),
     #[error(transparent)]
     Io(#[from] io::Error),
+    #[error("connection timed out")]
+    Timeout,
 }
 
 #[derive(Debug, Error)]
@@ -177,8 +179,6 @@ pub struct ClientState {
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub enum FrontendEvent {
-    /// client state has changed, new state must be requested via [`FrontendRequest::GetState`]
-    Changed(ClientHandle),
     /// a client was created
     Created(ClientHandle, ClientConfig, ClientState),
     /// no such client
@@ -229,8 +229,6 @@ pub enum FrontendRequest {
     UpdatePosition(ClientHandle, Position),
     /// update fix-ips
     UpdateFixIps(ClientHandle, Vec<IpAddr>),
-    /// request the state of the given client
-    GetState(ClientHandle),
     /// request reenabling input capture
     EnableCapture,
     /// request reenabling input emulation
@@ -241,6 +239,8 @@ pub enum FrontendRequest {
     AuthorizeKey(String, String),
     /// remove fingerprint (fingerprint)
     RemoveAuthorizedKey(String),
+    /// change the hook command
+    UpdateEnterHook(u64, Option<String>),
 }
 
 #[derive(Clone, Copy, PartialEq, Eq, Debug, Default, Serialize, Deserialize)]

nix/hm-module.nix

@@ -52,7 +52,7 @@ in {
       };
       Service = {
         Type = "simple";
-        ExecStart = "${cfg.package}/bin/lan-mouse --daemon";
+        ExecStart = "${cfg.package}/bin/lan-mouse daemon";
       };
       Install.WantedBy = [
         (lib.mkIf config.wayland.windowManager.hyprland.systemd.enable "hyprland-session.target")
@@ -65,7 +65,7 @@ in {
       config = {
         ProgramArguments = [
           "${cfg.package}/bin/lan-mouse"
-          "--daemon"
+          "daemon"
         ];
         KeepAlive = true;
       };

service/lan-mouse.service

@@ -6,7 +6,7 @@ After=graphical-session.target
 BindsTo=graphical-session.target
 
 [Service]
-ExecStart=/usr/bin/lan-mouse --daemon
+ExecStart=/usr/bin/lan-mouse daemon
 Restart=on-failure
 
 [Install]

src/capture_test.rs

@@ -1,12 +1,16 @@
 use crate::config::Config;
+use clap::Args;
 use futures::StreamExt;
 use input_capture::{self, CaptureError, CaptureEvent, InputCapture, InputCaptureError, Position};
 use input_event::{Event, KeyboardEvent};
 
-pub async fn run(config: Config) -> Result<(), InputCaptureError> {
+#[derive(Args, Clone, Debug, Eq, PartialEq)]
+pub struct TestCaptureArgs {}
+
+pub async fn run(config: Config, _args: TestCaptureArgs) -> Result<(), InputCaptureError> {
     log::info!("running input capture test");
     log::info!("creating input capture");
-    let backend = config.capture_backend.map(|b| b.into());
+    let backend = config.capture_backend().map(|b| b.into());
     loop {
         let mut input_capture = InputCapture::new(backend).await?;
         log::info!("creating clients");

src/client.rs

@@ -199,6 +199,13 @@ impl ClientManager {
         }
     }
 
+    /// update the enter hook command of the client
+    pub(crate) fn set_enter_hook(&self, handle: ClientHandle, enter_hook: Option<String>) {
+        if let Some((c, _s)) = self.clients.borrow_mut().get_mut(handle as usize) {
+            c.cmd = enter_hook;
+        }
+    }
+
     /// set resolving status of the client
     pub(crate) fn set_resolving(&self, handle: ClientHandle, status: bool) {
         if let Some((_, s)) = self.clients.borrow_mut().get_mut(handle as usize) {

src/config.rs

@@ -1,4 +1,6 @@
-use clap::{Parser, ValueEnum};
+use crate::capture_test::TestCaptureArgs;
+use crate::emulation_test::TestEmulationArgs;
+use clap::{Parser, Subcommand, ValueEnum};
 use serde::{Deserialize, Serialize};
 use std::collections::HashMap;
 use std::env::{self, VarError};
@@ -10,6 +12,7 @@ use std::{collections::HashSet, io};
 use thiserror::Error;
 use toml;
 
+use lan_mouse_cli::CliArgs;
 use lan_mouse_ipc::{Position, DEFAULT_PORT};
 
 use input_event::scancode::{
@@ -21,34 +24,50 @@ use shadow_rs::shadow;
 
 shadow!(build);
 
-#[derive(Serialize, Deserialize, Debug)]
-pub struct ConfigToml {
-    pub capture_backend: Option<CaptureBackend>,
-    pub emulation_backend: Option<EmulationBackend>,
-    pub port: Option<u16>,
-    pub frontend: Option<Frontend>,
-    pub release_bind: Option<Vec<scancode::Linux>>,
-    pub cert_path: Option<PathBuf>,
-    pub left: Option<TomlClient>,
-    pub right: Option<TomlClient>,
-    pub top: Option<TomlClient>,
-    pub bottom: Option<TomlClient>,
-    pub authorized_fingerprints: Option<HashMap<String, String>>,
+const CONFIG_FILE_NAME: &str = "config.toml";
+const CERT_FILE_NAME: &str = "lan-mouse.pem";
+
+fn default_path() -> Result<PathBuf, VarError> {
+    #[cfg(unix)]
+    let default_path = {
+        let xdg_config_home =
+            env::var("XDG_CONFIG_HOME").unwrap_or(format!("{}/.config", env::var("HOME")?));
+        format!("{xdg_config_home}/lan-mouse/")
+    };
+
+    #[cfg(not(unix))]
+    let default_path = {
+        let app_data =
+            env::var("LOCALAPPDATA").unwrap_or(format!("{}/.config", env::var("USERPROFILE")?));
+        format!("{app_data}\\lan-mouse\\")
+    };
+    Ok(PathBuf::from(default_path))
 }
 
-#[derive(Serialize, Deserialize, Debug, Eq, PartialEq)]
-pub struct TomlClient {
-    pub capture_backend: Option<CaptureBackend>,
-    pub hostname: Option<String>,
-    pub host_name: Option<String>,
-    pub ips: Option<Vec<IpAddr>>,
-    pub port: Option<u16>,
-    pub activate_on_startup: Option<bool>,
-    pub enter_hook: Option<String>,
+#[derive(Serialize, Deserialize, Debug)]
+struct ConfigToml {
+    capture_backend: Option<CaptureBackend>,
+    emulation_backend: Option<EmulationBackend>,
+    port: Option<u16>,
+    release_bind: Option<Vec<scancode::Linux>>,
+    cert_path: Option<PathBuf>,
+    clients: Vec<TomlClient>,
+    authorized_fingerprints: Option<HashMap<String, String>>,
+}
+
+#[derive(Clone, Serialize, Deserialize, Debug, Eq, PartialEq)]
+struct TomlClient {
+    hostname: Option<String>,
+    host_name: Option<String>,
+    ips: Option<Vec<IpAddr>>,
+    port: Option<u16>,
+    pos: Option<Position>,
+    activate_on_startup: Option<bool>,
+    enter_hook: Option<String>,
 }
 
 impl ConfigToml {
-    pub fn new(path: &Path) -> Result<ConfigToml, ConfigError> {
+    fn new(path: &Path) -> Result<ConfigToml, ConfigError> {
         let config = fs::read_to_string(path)?;
         Ok(toml::from_str::<_>(&config)?)
     }
@@ -56,30 +75,14 @@ impl ConfigToml {
 
 #[derive(Parser, Debug)]
 #[command(author, version=build::CLAP_LONG_VERSION, about, long_about = None)]
-struct CliArgs {
+struct Args {
     /// the listen port for lan-mouse
     #[arg(short, long)]
     port: Option<u16>,
 
-    /// the frontend to use [cli | gtk]
-    #[arg(short, long)]
-    frontend: Option<Frontend>,
-
     /// non-default config file location
     #[arg(short, long)]
-    config: Option<String>,
-
-    /// run only the service as a daemon without the frontend
-    #[arg(short, long)]
-    daemon: bool,
-
-    /// test input capture
-    #[arg(long)]
-    test_capture: bool,
-
-    /// test input emulation
-    #[arg(long)]
-    test_emulation: bool,
+    config: Option<PathBuf>,
 
     /// capture backend override
     #[arg(long)]
@@ -92,6 +95,22 @@ struct CliArgs {
     /// path to non-default certificate location
     #[arg(long)]
     cert_path: Option<PathBuf>,
+
+    /// subcommands
+    #[command(subcommand)]
+    command: Option<Command>,
+}
+
+#[derive(Subcommand, Clone, Debug, Eq, PartialEq)]
+pub enum Command {
+    /// test input emulation
+    TestEmulation(TestEmulationArgs),
+    /// test input capture
+    TestCapture(TestCaptureArgs),
+    /// Lan Mouse commandline interface
+    Cli(CliArgs),
+    /// run in daemon mode
+    Daemon,
 }
 
 #[derive(Clone, Copy, Debug, Deserialize, Eq, PartialEq, Serialize, ValueEnum)]
@@ -215,50 +234,16 @@ impl Display for EmulationBackend {
     }
 }
 
-#[derive(Clone, Copy, Debug, Deserialize, PartialEq, Eq, Serialize, ValueEnum)]
-pub enum Frontend {
-    #[serde(rename = "gtk")]
-    Gtk,
-    #[serde(rename = "cli")]
-    Cli,
-}
-
-impl Default for Frontend {
-    fn default() -> Self {
-        if cfg!(feature = "gtk") {
-            Self::Gtk
-        } else {
-            Self::Cli
-        }
-    }
-}
-
 #[derive(Debug)]
 pub struct Config {
-    /// the path to the configuration file used
-    pub path: PathBuf,
-    /// public key fingerprints authorized for connection
-    pub authorized_fingerprints: HashMap<String, String>,
-    /// optional input-capture backend override
-    pub capture_backend: Option<CaptureBackend>,
-    /// optional input-emulation backend override
-    pub emulation_backend: Option<EmulationBackend>,
-    /// the frontend to use
-    pub frontend: Frontend,
-    /// the port to use (initially)
-    pub port: u16,
-    /// list of clients
-    pub clients: Vec<(TomlClient, Position)>,
-    /// whether or not to run as a daemon
-    pub daemon: bool,
-    /// configured release bind
-    pub release_bind: Vec<scancode::Linux>,
-    /// test capture instead of running the app
-    pub test_capture: bool,
-    /// test emulation instead of running the app
-    pub test_emulation: bool,
-    /// path to the tls certificate to use
-    pub cert_path: PathBuf,
+    /// command line arguments
+    args: Args,
+    /// path to the certificate file used
+    cert_path: PathBuf,
+    /// path to the config file used
+    config_path: PathBuf,
+    /// the (optional) toml config and it's path
+    config_toml: Option<ConfigToml>,
 }
 
 pub struct ConfigClient {
@@ -270,6 +255,25 @@ pub struct ConfigClient {
     pub enter_hook: Option<String>,
 }
 
+impl From<TomlClient> for ConfigClient {
+    fn from(toml: TomlClient) -> Self {
+        let active = toml.activate_on_startup.unwrap_or(false);
+        let enter_hook = toml.enter_hook;
+        let hostname = toml.hostname;
+        let ips = HashSet::from_iter(toml.ips.into_iter().flatten());
+        let port = toml.port.unwrap_or(DEFAULT_PORT);
+        let pos = toml.pos.unwrap_or_default();
+        Self {
+            ips,
+            hostname,
+            port,
+            pos,
+            active,
+            enter_hook,
+        }
+    }
+}
+
 #[derive(Debug, Error)]
 pub enum ConfigError {
     #[error(transparent)]
@@ -285,134 +289,98 @@ const DEFAULT_RELEASE_KEYS: [scancode::Linux; 4] =
 
 impl Config {
     pub fn new() -> Result<Self, ConfigError> {
-        let args = CliArgs::parse();
-        const CONFIG_FILE_NAME: &str = "config.toml";
-        const CERT_FILE_NAME: &str = "lan-mouse.pem";
-
-        #[cfg(unix)]
-        let config_path = {
-            let xdg_config_home =
-                env::var("XDG_CONFIG_HOME").unwrap_or(format!("{}/.config", env::var("HOME")?));
-            format!("{xdg_config_home}/lan-mouse/")
-        };
-
-        #[cfg(not(unix))]
-        let config_path = {
-            let app_data =
-                env::var("LOCALAPPDATA").unwrap_or(format!("{}/.config", env::var("USERPROFILE")?));
-            format!("{app_data}\\lan-mouse\\")
-        };
-
-        let config_path = PathBuf::from(config_path);
-        let config_file = config_path.join(CONFIG_FILE_NAME);
+        let args = Args::parse();
 
         // --config <file> overrules default location
-        let config_file = args.config.map(PathBuf::from).unwrap_or(config_file);
+        let config_path = args
+            .config
+            .clone()
+            .unwrap_or(default_path()?.join(CONFIG_FILE_NAME));
 
-        let mut config_toml = match ConfigToml::new(&config_file) {
+        let config_toml = match ConfigToml::new(&config_path) {
             Err(e) => {
-                log::warn!("{config_file:?}: {e}");
+                log::warn!("{config_path:?}: {e}");
                 log::warn!("Continuing without config file ...");
                 None
             }
             Ok(c) => Some(c),
         };
 
-        let frontend_arg = args.frontend;
-        let frontend_cfg = config_toml.as_ref().and_then(|c| c.frontend);
-        let frontend = frontend_arg.or(frontend_cfg).unwrap_or_default();
-
-        let port = args
-            .port
-            .or(config_toml.as_ref().and_then(|c| c.port))
-            .unwrap_or(DEFAULT_PORT);
-
-        log::debug!("{config_toml:?}");
-        let release_bind = config_toml
-            .as_ref()
-            .and_then(|c| c.release_bind.clone())
-            .unwrap_or(Vec::from_iter(DEFAULT_RELEASE_KEYS.iter().cloned()));
-
-        let capture_backend = args
-            .capture_backend
-            .or(config_toml.as_ref().and_then(|c| c.capture_backend));
-
-        let emulation_backend = args
-            .emulation_backend
-            .or(config_toml.as_ref().and_then(|c| c.emulation_backend));
-
+        // --cert-path <file> overrules default location
         let cert_path = args
             .cert_path
+            .clone()
             .or(config_toml.as_ref().and_then(|c| c.cert_path.clone()))
-            .unwrap_or(config_path.join(CERT_FILE_NAME));
-
-        let authorized_fingerprints = config_toml
-            .as_mut()
-            .and_then(|c| std::mem::take(&mut c.authorized_fingerprints))
-            .unwrap_or_default();
-
-        let mut clients: Vec<(TomlClient, Position)> = vec![];
-
-        if let Some(config_toml) = config_toml {
-            if let Some(c) = config_toml.right {
-                clients.push((c, Position::Right))
-            }
-            if let Some(c) = config_toml.left {
-                clients.push((c, Position::Left))
-            }
-            if let Some(c) = config_toml.top {
-                clients.push((c, Position::Top))
-            }
-            if let Some(c) = config_toml.bottom {
-                clients.push((c, Position::Bottom))
-            }
-        }
-
-        let daemon = args.daemon;
-        let test_capture = args.test_capture;
-        let test_emulation = args.test_emulation;
+            .unwrap_or(default_path()?.join(CERT_FILE_NAME));
 
         Ok(Config {
-            path: config_path,
-            authorized_fingerprints,
-            capture_backend,
-            emulation_backend,
-            daemon,
-            frontend,
-            clients,
-            port,
-            release_bind,
-            test_capture,
-            test_emulation,
+            args,
             cert_path,
+            config_path,
+            config_toml,
         })
     }
 
-    pub fn get_clients(&self) -> Vec<ConfigClient> {
-        self.clients
-            .iter()
-            .map(|(c, pos)| {
-                let port = c.port.unwrap_or(DEFAULT_PORT);
-                let ips: HashSet<IpAddr> = if let Some(ips) = c.ips.as_ref() {
-                    HashSet::from_iter(ips.iter().cloned())
-                } else {
-                    HashSet::new()
-                };
-                let hostname = match &c.hostname {
-                    Some(h) => Some(h.clone()),
-                    None => c.host_name.clone(),
-                };
-                let active = c.activate_on_startup.unwrap_or(false);
-                let enter_hook = c.enter_hook.clone();
-                ConfigClient {
-                    ips,
-                    hostname,
-                    port,
-                    pos: *pos,
-                    active,
-                    enter_hook,
-                }
-            })
+    /// the command to run
+    pub fn command(&self) -> Option<Command> {
+        self.args.command.clone()
+    }
+
+    pub fn config_path(&self) -> &Path {
+        &self.config_path
+    }
+
+    /// public key fingerprints authorized for connection
+    pub fn authorized_fingerprints(&self) -> HashMap<String, String> {
+        self.config_toml
+            .as_ref()
+            .and_then(|c| c.authorized_fingerprints.clone())
+            .unwrap_or_default()
+    }
+
+    /// path to certificate
+    pub fn cert_path(&self) -> &Path {
+        &self.cert_path
+    }
+
+    /// optional input-capture backend override
+    pub fn capture_backend(&self) -> Option<CaptureBackend> {
+        self.args
+            .capture_backend
+            .or(self.config_toml.as_ref().and_then(|c| c.capture_backend))
+    }
+
+    /// optional input-emulation backend override
+    pub fn emulation_backend(&self) -> Option<EmulationBackend> {
+        self.args
+            .emulation_backend
+            .or(self.config_toml.as_ref().and_then(|c| c.emulation_backend))
+    }
+
+    /// the port to use (initially)
+    pub fn port(&self) -> u16 {
+        self.args
+            .port
+            .or(self.config_toml.as_ref().and_then(|c| c.port))
+            .unwrap_or(DEFAULT_PORT)
+    }
+
+    /// list of configured clients
+    pub fn clients(&self) -> Vec<ConfigClient> {
+        self.config_toml
+            .as_ref()
+            .map(|c| c.clients.clone())
+            .into_iter()
+            .flatten()
+            .map(From::<TomlClient>::from)
             .collect()
     }
+
+    /// release bind for returning control to the host
+    pub fn release_bind(&self) -> Vec<scancode::Linux> {
+        self.config_toml
+            .as_ref()
+            .and_then(|c| c.release_bind.clone())
+            .unwrap_or(Vec::from_iter(DEFAULT_RELEASE_KEYS.iter().cloned()))
+    }
 }

src/dns.rs

@@ -1,4 +1,4 @@
-use std::net::IpAddr;
+use std::{collections::HashMap, net::IpAddr};
 
 use local_channel::mpsc::{channel, Receiver, Sender};
 use tokio::task::{spawn_local, JoinHandle};
@@ -30,6 +30,7 @@ struct DnsTask {
     request_rx: Receiver<DnsRequest>,
     event_tx: Sender<DnsEvent>,
     cancellation_token: CancellationToken,
+    active_tasks: HashMap<ClientHandle, JoinHandle<()>>,
 }
 
 impl DnsResolver {
@@ -39,6 +40,7 @@ impl DnsResolver {
         let (event_tx, event_rx) = channel();
         let cancellation_token = CancellationToken::new();
         let dns_task = DnsTask {
+            active_tasks: Default::default(),
             resolver,
             request_rx,
             event_tx,
@@ -81,6 +83,14 @@ impl DnsTask {
         while let Some(dns_request) = self.request_rx.recv().await {
             let DnsRequest { handle, hostname } = dns_request;
 
+            /* abort previous dns task */
+            let previous_task = self.active_tasks.remove(&handle);
+            if let Some(task) = previous_task {
+                if !task.is_finished() {
+                    task.abort();
+                }
+            }
+
             self.event_tx
                 .send(DnsEvent::Resolving(handle))
                 .expect("channel closed");
@@ -90,7 +100,7 @@ impl DnsTask {
             let resolver = self.resolver.clone();
             let cancellation_token = self.cancellation_token.clone();
 
-            tokio::task::spawn_local(async move {
+            let task = tokio::task::spawn_local(async move {
                 tokio::select! {
                     ips = resolver.lookup_ip(&hostname) => {
                        let ips = ips.map(|ips| ips.iter().collect::<Vec<_>>());
@@ -101,6 +111,7 @@ impl DnsTask {
                     _ = cancellation_token.cancelled() => {},
                 }
             });
+            self.active_tasks.insert(handle, task);
         }
     }
 }

src/emulation_test.rs

@@ -1,4 +1,5 @@
 use crate::config::Config;
+use clap::Args;
 use input_emulation::{InputEmulation, InputEmulationError};
 use input_event::{Event, PointerEvent};
 use std::f64::consts::PI;
@@ -7,10 +8,20 @@ use std::time::{Duration, Instant};
 const FREQUENCY_HZ: f64 = 1.0;
 const RADIUS: f64 = 100.0;
 
-pub async fn run(config: Config) -> Result<(), InputEmulationError> {
+#[derive(Args, Clone, Debug, Eq, PartialEq)]
+pub struct TestEmulationArgs {
+    #[arg(long)]
+    mouse: bool,
+    #[arg(long)]
+    keyboard: bool,
+    #[arg(long)]
+    scroll: bool,
+}
+
+pub async fn run(config: Config, _args: TestEmulationArgs) -> Result<(), InputEmulationError> {
     log::info!("running input emulation test");
 
-    let backend = config.emulation_backend.map(|b| b.into());
+    let backend = config.emulation_backend().map(|b| b.into());
     let mut emulation = InputEmulation::new(backend).await?;
     emulation.create(0).await;
 

src/main.rs

@@ -3,15 +3,18 @@ use input_capture::InputCaptureError;
 use input_emulation::InputEmulationError;
 use lan_mouse::{
     capture_test,
-    config::{Config, ConfigError, Frontend},
+    config::{self, Command, Config, ConfigError},
     emulation_test,
     service::{Service, ServiceError},
 };
+use lan_mouse_cli::CliError;
+#[cfg(feature = "gtk")]
+use lan_mouse_gtk::GtkError;
 use lan_mouse_ipc::{IpcError, IpcListenerCreationError};
 use std::{
     future::Future,
     io,
-    process::{self, Child, Command},
+    process::{self, Child},
 };
 use thiserror::Error;
 use tokio::task::LocalSet;
@@ -30,6 +33,11 @@ enum LanMouseError {
     Capture(#[from] InputCaptureError),
     #[error(transparent)]
     Emulation(#[from] InputEmulationError),
+    #[cfg(feature = "gtk")]
+    #[error(transparent)]
+    Gtk(#[from] GtkError),
+    #[error(transparent)]
+    Cli(#[from] CliError),
 }
 
 fn main() {
@@ -44,35 +52,52 @@ fn main() {
 }
 
 fn run() -> Result<(), LanMouseError> {
-    // parse config file + cli args
-    let config = Config::new()?;
-    if config.test_capture {
-        run_async(capture_test::run(config))?;
-    } else if config.test_emulation {
-        run_async(emulation_test::run(config))?;
-    } else if config.daemon {
-        // if daemon is specified we run the service
-        match run_async(run_service(config)) {
-            Err(LanMouseError::Service(ServiceError::IpcListen(
-                IpcListenerCreationError::AlreadyRunning,
-            ))) => log::info!("service already running!"),
-            r => r?,
-        }
-    } else {
-        //  otherwise start the service as a child process and
-        //  run a frontend
-        let mut service = start_service()?;
-        run_frontend(&config)?;
-        #[cfg(unix)]
-        {
-            // on unix we give the service a chance to terminate gracefully
-            let pid = service.id() as libc::pid_t;
-            unsafe {
-                libc::kill(pid, libc::SIGINT);
+    let config = config::Config::new()?;
+    match config.command() {
+        Some(command) => match command {
+            Command::TestEmulation(args) => run_async(emulation_test::run(config, args))?,
+            Command::TestCapture(args) => run_async(capture_test::run(config, args))?,
+            Command::Cli(cli_args) => run_async(lan_mouse_cli::run(cli_args))?,
+            Command::Daemon => {
+                // if daemon is specified we run the service
+                match run_async(run_service(config)) {
+                    Err(LanMouseError::Service(ServiceError::IpcListen(
+                        IpcListenerCreationError::AlreadyRunning,
+                    ))) => log::info!("service already running!"),
+                    r => r?,
+                }
+            }
+        },
+        None => {
+            //  otherwise start the service as a child process and
+            //  run a frontend
+            #[cfg(feature = "gtk")]
+            {
+                let mut service = start_service()?;
+                let res = lan_mouse_gtk::run();
+                #[cfg(unix)]
+                {
+                    // on unix we give the service a chance to terminate gracefully
+                    let pid = service.id() as libc::pid_t;
+                    unsafe {
+                        libc::kill(pid, libc::SIGINT);
+                    }
+                    service.wait()?;
+                }
+                service.kill()?;
+                res?;
+            }
+            #[cfg(not(feature = "gtk"))]
+            {
+                // run daemon if gtk is diabled
+                match run_async(run_service(config)) {
+                    Err(LanMouseError::Service(ServiceError::IpcListen(
+                        IpcListenerCreationError::AlreadyRunning,
+                    ))) => log::info!("service already running!"),
+                    r => r?,
+                }
             }
-            service.wait()?;
         }
-        service.kill()?;
     }
 
     Ok(())
@@ -94,33 +119,20 @@ where
 }
 
 fn start_service() -> Result<Child, io::Error> {
-    let child = Command::new(std::env::current_exe()?)
+    let child = process::Command::new(std::env::current_exe()?)
         .args(std::env::args().skip(1))
-        .arg("--daemon")
+        .arg("daemon")
         .spawn()?;
     Ok(child)
 }
 
 async fn run_service(config: Config) -> Result<(), ServiceError> {
-    log::info!("using config: {:?}", config.path);
-    log::info!("Press {:?} to release the mouse", config.release_bind);
+    let release_bind = config.release_bind();
+    let config_path = config.config_path().to_owned();
     let mut service = Service::new(config).await?;
+    log::info!("using config: {config_path:?}");
+    log::info!("Press {release_bind:?} to release the mouse");
     service.run().await?;
     log::info!("service exited!");
     Ok(())
 }
-
-fn run_frontend(config: &Config) -> Result<(), IpcError> {
-    match config.frontend {
-        #[cfg(feature = "gtk")]
-        Frontend::Gtk => {
-            lan_mouse_gtk::run();
-        }
-        #[cfg(not(feature = "gtk"))]
-        Frontend::Gtk => panic!("gtk frontend requested but feature not enabled!"),
-        Frontend::Cli => {
-            lan_mouse_cli::run()?;
-        }
-    };
-    Ok(())
-}

src/service.rs

@@ -80,7 +80,7 @@ struct Incoming {
 impl Service {
     pub async fn new(config: Config) -> Result<Self, ServiceError> {
         let client_manager = ClientManager::default();
-        for client in config.get_clients() {
+        for client in config.clients() {
             let config = ClientConfig {
                 hostname: client.hostname,
                 fix_ips: client.ips.into_iter().collect(),
@@ -99,28 +99,28 @@ impl Service {
         }
 
         // load certificate
-        let cert = crypto::load_or_generate_key_and_cert(&config.cert_path)?;
+        let cert = crypto::load_or_generate_key_and_cert(config.cert_path())?;
         let public_key_fingerprint = crypto::certificate_fingerprint(&cert);
 
         // create frontend communication adapter, exit if already running
         let frontend_listener = AsyncFrontendListener::new().await?;
 
-        let authorized_keys = Arc::new(RwLock::new(config.authorized_fingerprints.clone()));
+        let authorized_keys = Arc::new(RwLock::new(config.authorized_fingerprints()));
         // listener + connection
         let listener =
-            LanMouseListener::new(config.port, cert.clone(), authorized_keys.clone()).await?;
+            LanMouseListener::new(config.port(), cert.clone(), authorized_keys.clone()).await?;
         let conn = LanMouseConnection::new(cert.clone(), client_manager.clone());
 
         // input capture + emulation
-        let capture_backend = config.capture_backend.map(|b| b.into());
-        let capture = Capture::new(capture_backend, conn, config.release_bind.clone());
-        let emulation_backend = config.emulation_backend.map(|b| b.into());
+        let capture_backend = config.capture_backend().map(|b| b.into());
+        let capture = Capture::new(capture_backend, conn, config.release_bind());
+        let emulation_backend = config.emulation_backend().map(|b| b.into());
         let emulation = Emulation::new(emulation_backend, listener);
 
         // create dns resolver
         let resolver = DnsResolver::new()?;
 
-        let port = config.port;
+        let port = config.port();
         let service = Self {
             capture,
             emulation,
@@ -142,11 +142,15 @@ impl Service {
     }
 
     pub async fn run(&mut self) -> Result<(), ServiceError> {
-        for handle in self.client_manager.active_clients() {
+        let active = self.client_manager.active_clients();
+        for handle in active.iter() {
             // small hack: `activate_client()` checks, if the client
             // is already active in client_manager and does not create a
             // capture barrier in that case so we have to deactivate it first
-            self.client_manager.deactivate_client(handle);
+            self.client_manager.deactivate_client(*handle);
+        }
+
+        for handle in active {
             self.activate_client(handle);
         }
 
@@ -186,7 +190,6 @@ impl Service {
             FrontendRequest::EnableCapture => self.capture.reenable(),
             FrontendRequest::EnableEmulation => self.emulation.reenable(),
             FrontendRequest::Enumerate() => self.enumerate(),
-            FrontendRequest::GetState(handle) => self.broadcast_client(handle),
             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),
@@ -194,6 +197,9 @@ impl Service {
             FrontendRequest::ResolveDns(handle) => self.resolve(handle),
             FrontendRequest::Sync => self.sync_frontend(),
             FrontendRequest::RemoveAuthorizedKey(key) => self.remove_authorized_key(key),
+            FrontendRequest::UpdateEnterHook(handle, enter_hook) => {
+                self.update_enter_hook(handle, enter_hook)
+            }
         }
     }
 
@@ -283,7 +289,7 @@ impl Service {
                 handle
             }
         };
-        self.notify_frontend(FrontendEvent::Changed(handle));
+        self.broadcast_client(handle);
     }
 
     fn resolve(&self, handle: ClientHandle) {
@@ -399,7 +405,7 @@ impl Service {
         log::debug!("deactivating client {handle}");
         if self.client_manager.deactivate_client(handle) {
             self.capture.destroy(handle);
-            self.notify_frontend(FrontendEvent::Changed(handle));
+            self.broadcast_client(handle);
             log::info!("deactivated client {handle}");
         }
     }
@@ -425,7 +431,7 @@ impl Service {
         if self.client_manager.activate_client(handle) {
             /* notify capture and frontends */
             self.capture.create(handle, pos, CaptureType::Default);
-            self.notify_frontend(FrontendEvent::Changed(handle));
+            self.broadcast_client(handle);
             log::info!("activated client {handle} ({pos})");
         }
     }
@@ -452,19 +458,20 @@ impl Service {
 
     fn update_fix_ips(&mut self, handle: ClientHandle, fix_ips: Vec<IpAddr>) {
         self.client_manager.set_fix_ips(handle, fix_ips);
-        self.notify_frontend(FrontendEvent::Changed(handle));
+        self.broadcast_client(handle);
     }
 
     fn update_hostname(&mut self, handle: ClientHandle, hostname: Option<String>) {
+        log::info!("hostname changed: {hostname:?}");
         if self.client_manager.set_hostname(handle, hostname.clone()) {
             self.resolve(handle);
         }
-        self.notify_frontend(FrontendEvent::Changed(handle));
+        self.broadcast_client(handle);
     }
 
     fn update_port(&mut self, handle: ClientHandle, port: u16) {
         self.client_manager.set_port(handle, port);
-        self.notify_frontend(FrontendEvent::Changed(handle));
+        self.broadcast_client(handle);
     }
 
     fn update_pos(&mut self, handle: ClientHandle, pos: Position) {
@@ -473,7 +480,12 @@ impl Service {
             self.deactivate_client(handle);
             self.activate_client(handle);
         }
-        self.notify_frontend(FrontendEvent::Changed(handle));
+        self.broadcast_client(handle);
+    }
+
+    fn update_enter_hook(&mut self, handle: ClientHandle, enter_hook: Option<String>) {
+        self.client_manager.set_enter_hook(handle, enter_hook);
+        self.broadcast_client(handle);
     }
 
     fn broadcast_client(&mut self, handle: ClientHandle) {