clients should not be mandatory in configuration

closes #284

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

@@ -268,19 +268,17 @@ If the device still can not be entered, make sure you have UDP port `4242` (or t
 <details>
     <summary>Command Line Interface</summary>
 
-The cli interface can be enabled using `--frontend cli` as commandline arguments.
+The cli interface can be accessed by passing `cli` as a commandline argument.
-Type `help` to list the available commands.
+Use
-
-E.g.:
 ```sh
-$ cargo run --release -- --frontend cli
+lan-mouse cli help
-(...)
-> connect <host> left|right|top|bottom
-(...)
-> list
-(...)
-> activate 0
 ```
+ to list the available commands and
+```sh
+lan-mouse cli <cmd> help
+```
+for information on how to use a specific command.
+
 </details>
 
 <details>
@@ -288,10 +286,10 @@ $ 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,
@@ -326,9 +324,6 @@ release_bind = [ "KeyA", "KeyS", "KeyD", "KeyF" ]
 
 # optional port (defaults to 4242)
 port = 4242
-# # optional frontend -> defaults to gtk if available
-# # possible values are "cli" and "gtk"
-# frontend = "gtk"
 
 # list of authorized tls certificate fingerprints that
 # are accepted for incoming traffic
@@ -336,7 +331,9 @@ port = 4242
 "bc:05:ab:7a:a4:de:88:8c:2f:92:ac:bc:b8:49:b8:24:0d:44:b3:e6:a4:ef:d7:0b:6c:69:6d:77:53:0b:14:80" = "iridium"
 
 # define a client on the right side with host name "iridium"
-[right]
+[[clients]]
+# position (left | right | top | bottom)
+position = "right"
 # hostname
 hostname = "iridium"
 # activate this client immediately when lan-mouse is started
@@ -345,7 +342,8 @@ activate_on_startup = true
 ips = ["192.168.178.156"]
 
 # define a client on the left side with IP address 192.168.178.189
-[left]
+[[clients]]
+position = "left"
 # The hostname is optional: When no hostname is specified,
 # at least one ip address needs to be specified.
 hostname = "thorium"

config.toml

@@ -1,14 +1,10 @@
 # example configuration
 
-# capture_backend = "LayerShell"
+# configure release bind
-
+release_bind = [ "KeyA", "KeyS", "KeyD", "KeyF" ]
-# release bind
-release_bind = ["KeyA", "KeyS", "KeyD", "KeyF"]
 
 # optional port (defaults to 4242)
 port = 4242
-# optional frontend -> defaults to gtk if available
-# frontend = "gtk"
 
 # list of authorized tls certificate fingerprints that
 # are accepted for incoming traffic
@@ -16,14 +12,19 @@ port = 4242
 "bc:05:ab:7a:a4:de:88:8c:2f:92:ac:bc:b8:49:b8:24:0d:44:b3:e6:a4:ef:d7:0b:6c:69:6d:77:53:0b:14:80" = "iridium"
 
 # define a client on the right side with host name "iridium"
-[right]
+[[clients]]
+# position (left | right | top | bottom)
+position = "right"
 # hostname
 hostname = "iridium"
+# activate this client immediately when lan-mouse is started
+activate_on_startup = true
 # optional list of (known) ip addresses
 ips = ["192.168.178.156"]
 
 # define a client on the left side with IP address 192.168.178.189
-[left]
+[[clients]]
+position = "left"
 # The hostname is optional: When no hostname is specified,
 # at least one ip address needs to be specified.
 hostname = "thorium"

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

@@ -1,298 +1,167 @@
+use clap::{Args, Parser, Subcommand};
 use futures::StreamExt;
-use tokio::{
-    io::{AsyncBufReadExt, BufReader},
-    task::LocalSet,
-};
 
-use std::io::{self, Write};
+use std::{net::IpAddr, time::Duration};
-
+use thiserror::Error;
-use self::command::{Command, CommandType};
 
 use lan_mouse_ipc::{
-    AsyncFrontendEventReader, AsyncFrontendRequestWriter, ClientConfig, ClientHandle, ClientState,
+    connect_async, ClientHandle, ConnectionError, FrontendEvent, FrontendRequest, IpcError,
-    FrontendEvent, FrontendRequest, IpcError, DEFAULT_PORT,
+    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> {
+#[derive(Parser, Clone, Debug, PartialEq, Eq)]
-    let runtime = tokio::runtime::Builder::new_current_thread()
+#[command(name = "lan-mouse-cli", about = "LanMouse CLI interface")]
-        .enable_io()
+pub struct CliArgs {
-        .enable_time()
+    #[command(subcommand)]
-        .build()?;
+    command: CliSubcommand,
-    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);
+#[derive(Args, Clone, Debug, PartialEq, Eq)]
-        cli.run().await
+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 {
+async fn execute(cmd: CliSubcommand) -> Result<(), CliError> {
-    clients: Vec<(ClientHandle, ClientConfig, ClientState)>,
+    let (mut rx, mut tx) = connect_async(Some(Duration::from_millis(500))).await?;
-    rx: AsyncFrontendEventReader,
+    match cmd {
-    tx: AsyncFrontendRequestWriter,
+        CliSubcommand::AddClient(Client {
-}
+            hostname,
-
+            port,
-impl Cli {
+            ips,
-    fn new(rx: AsyncFrontendEventReader, tx: AsyncFrontendRequestWriter) -> Cli {
+            enter_hook,
-        Self {
+        }) => {
-            clients: vec![],
+            tx.request(FrontendRequest::Create).await?;
-            rx,
+            while let Some(e) = rx.next().await {
-            tx,
+                if let FrontendEvent::Created(handle, _, _) = e? {
-        }
+                    if let Some(hostname) = hostname {
-    }
+                        tx.request(FrontendRequest::UpdateHostname(handle, Some(hostname)))
-
+                            .await?;
-    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;
                     }
-                }
+                    if let Some(port) = port {
-                Some(Err(e)) => return Err(e),
+                        tx.request(FrontendRequest::UpdatePort(handle, port))
-                None => return Ok(()),
+                            .await?;
-            }
-        };
-
-        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(ips) = ips {
+                        tx.request(FrontendRequest::UpdateFixIps(handle, ips))
+                            .await?;
+                    }
+                    if let Some(enter_hook) = enter_hook {
+                        tx.request(FrontendRequest::UpdateEnterHook(handle, Some(enter_hook)))
+                            .await?;
+                    }
+                    break;
                 }
             }
         }
-    }
+        CliSubcommand::RemoveClient { id } => tx.request(FrontendRequest::Delete(id)).await?,
-
+        CliSubcommand::Activate { id } => tx.request(FrontendRequest::Activate(id, true)).await?,
-    async fn execute(&mut self, cmd: Command) -> Result<(), IpcError> {
+        CliSubcommand::Deactivate { id } => {
-        match cmd {
+            tx.request(FrontendRequest::Activate(id, false)).await?
-            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;
-                            }
-                        }
-                    }
-                };
-                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?;
-                }
-            }
-            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;
-                        }
-                    }
-                }
-            }
-            Command::Activate(id) => {
-                self.tx.request(FrontendRequest::Activate(id, true)).await?;
-            }
-            Command::Deactivate(id) => {
-                self.tx
-                    .request(FrontendRequest::Activate(id, false))
-                    .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?;
-            }
-            Command::SetPort(handle, port) => {
-                let request = FrontendRequest::UpdatePort(handle, port.unwrap_or(DEFAULT_PORT));
-                self.tx.request(request).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());
-                }
-            }
         }
-        Ok(())
+        CliSubcommand::List => {
-    }
+            tx.request(FrontendRequest::Enumerate()).await?;
-
+            while let Some(e) = rx.next().await {
-    fn find_mut(
+                if let FrontendEvent::Enumerate(clients) = e? {
-        &mut self,
+                    for (handle, config, state) in clients {
-        handle: ClientHandle,
+                        let host = config.hostname.unwrap_or("unknown".to_owned());
-    ) -> Option<&mut (ClientHandle, ClientConfig, ClientState)> {
+                        let port = config.port;
-        self.clients.iter_mut().find(|(h, _, _)| *h == handle)
+                        let pos = config.pos;
-    }
+                        let active = state.active;
-
+                        let ips = state.ips;
-    fn remove(
+                        println!(
-        &mut self,
+                            "id {handle}: {host}:{port} ({pos}) active: {active}, ips: {ips:?}"
-        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::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
                         );
                     }
-                    if config.port != c.port {
+                    break;
-                        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;
                 }
             }
-            FrontendEvent::Deleted(h) => {
+        }
-                if let Some((h, c, _)) = self.remove(h) {
+        CliSubcommand::SetHost { id, host } => {
-                    eprint!("client {h} removed (");
+            tx.request(FrontendRequest::UpdateHostname(id, host))
-                    print_config(&c);
+                .await?
-                    eprintln!(")");
+        }
-                }
+        CliSubcommand::SetPort { id, port } => {
-            }
+            tx.request(FrontendRequest::UpdatePort(id, port)).await?
-            FrontendEvent::PortChanged(p, e) => {
+        }
-                if let Some(e) = e {
+        CliSubcommand::SetPosition { id, pos } => {
-                    eprintln!("failed to change port: {e}");
+            tx.request(FrontendRequest::UpdatePosition(id, pos)).await?
-                } else {
+        }
-                    eprintln!("changed port to {p}");
+        CliSubcommand::SetIps { id, ips } => {
-                }
+            tx.request(FrontendRequest::UpdateFixIps(id, ips)).await?
-            }
+        }
-            FrontendEvent::Enumerate(clients) => {
+        CliSubcommand::EnableCapture => tx.request(FrontendRequest::EnableCapture).await?,
-                self.clients = clients;
+        CliSubcommand::EnableEmulation => tx.request(FrontendRequest::EnableEmulation).await?,
-                self.print_clients();
+        CliSubcommand::AuthorizeKey {
-            }
+            description,
-            FrontendEvent::Error(e) => {
+            sha256_fingerprint,
-                eprintln!("ERROR: {e}");
+        } => {
-            }
+            tx.request(FrontendRequest::AuthorizeKey(
-            FrontendEvent::CaptureStatus(s) => {
+                description,
-                eprintln!("capture status: {s:?}")
+                sha256_fingerprint,
-            }
+            ))
-            FrontendEvent::EmulationStatus(s) => {
+            .await?
-                eprintln!("emulation status: {s:?}")
+        }
-            }
+        CliSubcommand::RemoveAuthorizedKey { sha256_fingerprint } => {
-            FrontendEvent::AuthorizedUpdated(fingerprints) => {
+            tx.request(FrontendRequest::RemoveAuthorizedKey(sha256_fingerprint))
-                eprintln!("authorized keys changed:");
+                .await?
-                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(..) => {}
         }
     }
-
-    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/authorization_window.ui

@@ -0,0 +1,102 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<interface>
+  <requires lib="gtk" version="4.0"/>
+  <requires lib="libadwaita" version="1.0"/>
+  <template class="AuthorizationWindow" parent="AdwWindow">
+    <property name="modal">True</property>
+    <property name="width-request">180</property>
+    <property name="default-width">180</property>
+    <property name="height-request">180</property>
+    <property name="default-height">180</property>
+    <property name="title" translatable="yes">Unauthorized Device</property>
+    <property name="content">
+      <object class="GtkBox">
+        <property name="orientation">vertical</property>
+        <property name="vexpand">True</property>
+        <child type="top">
+          <object class="AdwHeaderBar">
+            <style>
+              <class name="flat"/>
+            </style>
+          </object>
+        </child>
+        <child>
+          <object class="GtkBox">
+            <property name="orientation">vertical</property>
+            <property name="spacing">30</property>
+            <property name="margin-start">30</property>
+            <property name="margin-end">30</property>
+            <property name="margin-top">30</property>
+            <property name="margin-bottom">30</property>
+            <child>
+              <object class="GtkLabel">
+                <property name="label">An unauthorized Device is trying to connect. Do you want to authorize this Device?</property>
+                <property name="width-request">100</property>
+                <property name="wrap">word-wrap</property>
+              </object>
+            </child>
+            <child>
+              <object class="AdwPreferencesGroup">
+                <property name="title">sha256 fingerprint</property>
+                <child>
+                  <object class="AdwActionRow">
+                    <property name="child">
+                      <object class="GtkLabel" id="fingerprint">
+                        <property name="ellipsize">PANGO_ELLIPSIZE_NONE</property>
+                        <property name="vexpand">True</property>
+                        <property name="hexpand">False</property>
+                        <property name="wrap">True</property>
+                        <property name="wrap-mode">word-char</property>
+                        <property name="justify">center</property>
+                        <property name="xalign">0.5</property>
+                        <property name="margin-top">10</property>
+                        <property name="margin-bottom">10</property>
+                        <property name="margin-start">10</property>
+                        <property name="margin-end">10</property>
+                        <property name="width-chars">64</property>
+                      </object>
+                    </property>
+                  </object>
+                </child>
+              </object>
+            </child>
+          </object>
+        </child>
+        <child>
+          <object class="GtkBox">
+            <property name="margin-start">30</property>
+            <property name="margin-end">30</property>
+            <property name="margin-top">30</property>
+            <property name="margin-bottom">30</property>
+            <property name="orientation">horizontal</property>
+            <property name="spacing">30</property>
+            <property name="hexpand">True</property>
+            <property name="vexpand">True</property>
+            <property name="valign">end</property>
+            <child>
+              <object class="GtkButton" id="cancel_button">
+                <signal name="clicked" handler="handle_cancel" swapped="true"/>
+                <property name="label" translatable="yes">Cancel</property>
+                <property name="can-shrink">True</property>
+                <property name="height-request">50</property>
+                <property name="hexpand">True</property>
+              </object>
+            </child>
+            <child>
+              <object class="GtkButton" id="confirm_button">
+                <signal name="clicked" handler="handle_confirm" swapped="true"/>
+                <property name="label" translatable="yes">Authorize</property>
+                <property name="can-shrink">True</property>
+                <property name="height-request">50</property>
+                <property name="hexpand">True</property>
+                <style>
+                  <class name="destructive-action"/>
+                </style>
+              </object>
+            </child>
+          </object>
+        </child>
+      </object>
+    </property>
+  </template>
+</interface>

lan-mouse-gtk/resources/resources.gresource.xml

@@ -2,6 +2,7 @@
 <gresources>
   <gresource prefix="/de/feschber/LanMouse">
     <file compressed="true" preprocess="xml-stripblanks">window.ui</file>
+    <file compressed="true" preprocess="xml-stripblanks">authorization_window.ui</file>
     <file compressed="true" preprocess="xml-stripblanks">fingerprint_window.ui</file>
     <file compressed="true" preprocess="xml-stripblanks">client_row.ui</file>
     <file compressed="true" preprocess="xml-stripblanks">key_row.ui</file>

lan-mouse-gtk/src/authorization_window.rs

@@ -0,0 +1,19 @@
+mod imp;
+
+use glib::Object;
+use gtk::{gio, glib, subclass::prelude::ObjectSubclassIsExt};
+
+glib::wrapper! {
+    pub struct AuthorizationWindow(ObjectSubclass<imp::AuthorizationWindow>)
+    @extends adw::Window, gtk::Window, gtk::Widget,
+    @implements gio::ActionGroup, gio::ActionMap, gtk::Accessible, gtk::Buildable,
+                gtk::ConstraintTarget, gtk::Native, gtk::Root, gtk::ShortcutManager;
+}
+
+impl AuthorizationWindow {
+    pub(crate) fn new(fingerprint: &str) -> Self {
+        let window: Self = Object::builder().build();
+        window.imp().set_fingerprint(fingerprint);
+        window
+    }
+}

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

@@ -0,0 +1,75 @@
+use std::sync::OnceLock;
+
+use adw::prelude::*;
+use adw::subclass::prelude::*;
+use glib::subclass::InitializingObject;
+use gtk::{
+    glib::{self, subclass::Signal},
+    template_callbacks, Button, CompositeTemplate, Label,
+};
+
+#[derive(CompositeTemplate, Default)]
+#[template(resource = "/de/feschber/LanMouse/authorization_window.ui")]
+pub struct AuthorizationWindow {
+    #[template_child]
+    pub fingerprint: TemplateChild<Label>,
+    #[template_child]
+    pub cancel_button: TemplateChild<Button>,
+    #[template_child]
+    pub confirm_button: TemplateChild<Button>,
+}
+
+#[glib::object_subclass]
+impl ObjectSubclass for AuthorizationWindow {
+    const NAME: &'static str = "AuthorizationWindow";
+    const ABSTRACT: bool = false;
+
+    type Type = super::AuthorizationWindow;
+    type ParentType = adw::Window;
+
+    fn class_init(klass: &mut Self::Class) {
+        klass.bind_template();
+        klass.bind_template_callbacks();
+    }
+
+    fn instance_init(obj: &InitializingObject<Self>) {
+        obj.init_template();
+    }
+}
+
+#[template_callbacks]
+impl AuthorizationWindow {
+    #[template_callback]
+    fn handle_confirm(&self, _button: Button) {
+        let fp = self.fingerprint.text().as_str().trim().to_owned();
+        self.obj().emit_by_name("confirm-clicked", &[&fp])
+    }
+
+    #[template_callback]
+    fn handle_cancel(&self, _: Button) {
+        self.obj().emit_by_name("cancel-clicked", &[])
+    }
+
+    pub(super) fn set_fingerprint(&self, fingerprint: &str) {
+        self.fingerprint.set_text(fingerprint);
+    }
+}
+
+impl ObjectImpl for AuthorizationWindow {
+    fn signals() -> &'static [Signal] {
+        static SIGNALS: OnceLock<Vec<Signal>> = OnceLock::new();
+        SIGNALS.get_or_init(|| {
+            vec![
+                Signal::builder("confirm-clicked")
+                    .param_types([String::static_type()])
+                    .build(),
+                Signal::builder("cancel-clicked").build(),
+            ]
+        })
+    }
+}
+
+impl WidgetImpl for AuthorizationWindow {}
+impl WindowImpl for AuthorizationWindow {}
+impl ApplicationWindowImpl for AuthorizationWindow {}
+impl AdwWindowImpl for AuthorizationWindow {}

lan-mouse-gtk/src/fingerprint_window.rs

@@ -1,7 +1,7 @@
 mod imp;
 
 use glib::Object;
-use gtk::{gio, glib};
+use gtk::{gio, glib, prelude::ObjectExt, subclass::prelude::ObjectSubclassIsExt};
 
 glib::wrapper! {
     pub struct FingerprintWindow(ObjectSubclass<imp::FingerprintWindow>)
@@ -11,8 +11,12 @@ glib::wrapper! {
 }
 
 impl FingerprintWindow {
-    pub(crate) fn new() -> Self {
+    pub(crate) fn new(fingerprint: Option<String>) -> Self {
         let window: Self = Object::builder().build();
+        if let Some(fp) = fingerprint {
+            window.imp().fingerprint.set_property("text", fp);
+            window.imp().fingerprint.set_property("editable", false);
+        }
         window
     }
 }

lan-mouse-gtk/src/lib.rs

@@ -1,3 +1,4 @@
+mod authorization_window;
 mod client_object;
 mod client_row;
 mod fingerprint_window;
@@ -18,7 +19,15 @@ 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()
@@ -31,13 +40,10 @@ pub fn run() -> glib::ExitCode {
     #[cfg(not(windows))]
     let ret = gtk_main();
 
-    if ret == glib::ExitCode::FAILURE {
+    match ret {
-        log::error!("frontend exited with failure");
+        glib::ExitCode::SUCCESS => Ok(()),
-    } else {
+        e => Err(GtkError::NonZeroExitCode(e.value())),
-        log::info!("frontend exited successfully");
     }
-
-    ret
 }
 
 fn gtk_main() -> glib::ExitCode {
@@ -141,8 +147,21 @@ fn build_ui(app: &Application) {
                     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) => {
+                    FrontendEvent::ConnectionAttempt { fingerprint } => {
-                        window.show_toast(format!("device connected: {addr} ({pos})").as_str());
+                        window.request_authorization(&fingerprint);
+                    }
+                    FrontendEvent::DeviceConnected {
+                        fingerprint: _,
+                        addr,
+                    } => {
+                        window.show_toast(format!("device connected: {addr}").as_str());
+                    }
+                    FrontendEvent::DeviceEntered {
+                        fingerprint: _,
+                        addr,
+                        pos,
+                    } => {
+                        window.show_toast(format!("device entered: {addr} ({pos})").as_str());
                     }
                     FrontendEvent::IncomingDisconnected(addr) => {
                         window.show_toast(format!("{addr} disconnected").as_str());

lan-mouse-gtk/src/window.rs

@@ -16,7 +16,10 @@ use lan_mouse_ipc::{
     DEFAULT_PORT,
 };
 
-use crate::{fingerprint_window::FingerprintWindow, key_object::KeyObject, key_row::KeyRow};
+use crate::{
+    authorization_window::AuthorizationWindow, fingerprint_window::FingerprintWindow,
+    key_object::KeyObject, key_row::KeyRow,
+};
 
 use super::{client_object::ClientObject, client_row::ClientRow};
 
@@ -126,7 +129,7 @@ impl Window {
                             #[strong]
                             window,
                             move |row: ClientRow, hostname: String| {
-                                log::info!("request-hostname-change");
+                                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
@@ -163,7 +166,7 @@ impl Window {
                             window,
                             move |row: ClientRow, active: bool| {
                                 if let Some(client) = window.client_by_idx(row.index() as u32) {
-                                    log::info!(
+                                    log::debug!(
                                         "request: {} client",
                                         if active { "activating" } else { "deactivating" }
                                     );
@@ -394,8 +397,8 @@ impl Window {
         self.request(FrontendRequest::Create);
     }
 
-    fn open_fingerprint_dialog(&self) {
+    fn open_fingerprint_dialog(&self, fp: Option<String>) {
-        let window = FingerprintWindow::new();
+        let window = FingerprintWindow::new(fp);
         window.set_transient_for(Some(self));
         window.connect_closure(
             "confirm-clicked",
@@ -469,4 +472,29 @@ impl Window {
     pub(super) fn set_pk_fp(&self, fingerprint: &str) {
         self.imp().fingerprint_row.set_subtitle(fingerprint);
     }
+
+    pub(super) fn request_authorization(&self, fingerprint: &str) {
+        let window = AuthorizationWindow::new(fingerprint);
+        window.set_transient_for(Some(self));
+        window.connect_closure(
+            "confirm-clicked",
+            false,
+            closure_local!(
+                #[strong(rename_to = parent)]
+                self,
+                move |w: AuthorizationWindow, fp: String| {
+                    w.close();
+                    parent.open_fingerprint_dialog(Some(fp));
+                }
+            ),
+        );
+        window.connect_closure(
+            "cancel-clicked",
+            false,
+            closure_local!(move |w: AuthorizationWindow| {
+                w.close();
+            }),
+        );
+        window.present();
+    }
 }

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

@@ -149,7 +149,7 @@ impl Window {
 
     #[template_callback]
     fn handle_add_cert_fingerprint(&self, _button: &Button) {
-        self.obj().open_fingerprint_dialog();
+        self.obj().open_fingerprint_dialog(None);
     }
 
     pub fn set_port(&self, port: u16) {

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)]
@@ -57,6 +59,7 @@ pub enum IpcError {
 pub const DEFAULT_PORT: u16 = 4242;
 
 #[derive(Debug, Default, Eq, Hash, PartialEq, Clone, Copy, Serialize, Deserialize)]
+#[serde(rename_all = "lowercase")]
 pub enum Position {
     #[default]
     Left,
@@ -199,10 +202,21 @@ pub enum FrontendEvent {
     AuthorizedUpdated(HashMap<String, String>),
     /// public key fingerprint of this device
     PublicKeyFingerprint(String),
-    /// incoming connected
+    /// new device connected
-    IncomingConnected(String, SocketAddr, Position),
+    DeviceConnected {
+        addr: SocketAddr,
+        fingerprint: String,
+    },
+    /// incoming device entered the screen
+    DeviceEntered {
+        fingerprint: String,
+        addr: SocketAddr,
+        pos: Position,
+    },
     /// incoming disconnected
     IncomingDisconnected(SocketAddr),
+    /// failed connection attempt (approval for fingerprint required)
+    ConnectionAttempt { fingerprint: String },
 }
 
 #[derive(Debug, Eq, PartialEq, Clone, Serialize, Deserialize)]
@@ -237,6 +251,8 @@ 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::{
@@ -21,33 +24,50 @@ use shadow_rs::shadow;
 
 shadow!(build);
 
-#[derive(Serialize, Deserialize, Debug)]
+const CONFIG_FILE_NAME: &str = "config.toml";
-pub struct ConfigToml {
+const CERT_FILE_NAME: &str = "lan-mouse.pem";
-    pub capture_backend: Option<CaptureBackend>,
+
-    pub emulation_backend: Option<EmulationBackend>,
+fn default_path() -> Result<PathBuf, VarError> {
-    pub port: Option<u16>,
+    #[cfg(unix)]
-    pub frontend: Option<Frontend>,
+    let default_path = {
-    pub release_bind: Option<Vec<scancode::Linux>>,
+        let xdg_config_home =
-    pub cert_path: Option<PathBuf>,
+            env::var("XDG_CONFIG_HOME").unwrap_or(format!("{}/.config", env::var("HOME")?));
-    pub left: Option<TomlClient>,
+        format!("{xdg_config_home}/lan-mouse/")
-    pub right: Option<TomlClient>,
+    };
-    pub top: Option<TomlClient>,
+
-    pub bottom: Option<TomlClient>,
+    #[cfg(not(unix))]
-    pub authorized_fingerprints: Option<HashMap<String, String>>,
+    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)]
+#[derive(Serialize, Deserialize, Debug)]
-pub struct TomlClient {
+struct ConfigToml {
-    pub hostname: Option<String>,
+    capture_backend: Option<CaptureBackend>,
-    pub host_name: Option<String>,
+    emulation_backend: Option<EmulationBackend>,
-    pub ips: Option<Vec<IpAddr>>,
+    port: Option<u16>,
-    pub port: Option<u16>,
+    release_bind: Option<Vec<scancode::Linux>>,
-    pub activate_on_startup: Option<bool>,
+    cert_path: Option<PathBuf>,
-    pub enter_hook: Option<String>,
+    clients: Option<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>,
+    position: 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)?)
     }
@@ -55,30 +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>,
+    config: Option<PathBuf>,
-
-    /// 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,
 
     /// capture backend override
     #[arg(long)]
@@ -91,6 +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)]
@@ -214,50 +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
+    /// command line arguments
-    pub path: PathBuf,
+    args: Args,
-    /// public key fingerprints authorized for connection
+    /// path to the certificate file used
-    pub authorized_fingerprints: HashMap<String, String>,
+    cert_path: PathBuf,
-    /// optional input-capture backend override
+    /// path to the config file used
-    pub capture_backend: Option<CaptureBackend>,
+    config_path: PathBuf,
-    /// optional input-emulation backend override
+    /// the (optional) toml config and it's path
-    pub emulation_backend: Option<EmulationBackend>,
+    config_toml: Option<ConfigToml>,
-    /// 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,
 }
 
 pub struct ConfigClient {
@@ -269,6 +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.position.unwrap_or_default();
+        Self {
+            ips,
+            hostname,
+            port,
+            pos,
+            active,
+            enter_hook,
+        }
+    }
+}
+
 #[derive(Debug, Error)]
 pub enum ConfigError {
     #[error(transparent)]
@@ -284,134 +289,99 @@ const DEFAULT_RELEASE_KEYS: [scancode::Linux; 4] =
 
 impl Config {
     pub fn new() -> Result<Self, ConfigError> {
-        let args = CliArgs::parse();
+        let args = Args::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);
 
         // --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;
+        // --cert-path <file> overrules default location
-        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));
-
         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));
+            .unwrap_or(default_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;
 
         Ok(Config {
-            path: config_path,
+            args,
-            authorized_fingerprints,
-            capture_backend,
-            emulation_backend,
-            daemon,
-            frontend,
-            clients,
-            port,
-            release_bind,
-            test_capture,
-            test_emulation,
             cert_path,
+            config_path,
+            config_toml,
         })
     }
 
-    pub fn get_clients(&self) -> Vec<ConfigClient> {
+    /// the command to run
-        self.clients
+    pub fn command(&self) -> Option<Command> {
-            .iter()
+        self.args.command.clone()
-            .map(|(c, pos)| {
+    }
-                let port = c.port.unwrap_or(DEFAULT_PORT);
+
-                let ips: HashSet<IpAddr> = if let Some(ips) = c.ips.as_ref() {
+    pub fn config_path(&self) -> &Path {
-                    HashSet::from_iter(ips.iter().cloned())
+        &self.config_path
-                } else {
+    }
-                    HashSet::new()
+
-                };
+    /// public key fingerprints authorized for connection
-                let hostname = match &c.hostname {
+    pub fn authorized_fingerprints(&self) -> HashMap<String, String> {
-                    Some(h) => Some(h.clone()),
+        self.config_toml
-                    None => c.host_name.clone(),
+            .as_ref()
-                };
+            .and_then(|c| c.authorized_fingerprints.clone())
-                let active = c.activate_on_startup.unwrap_or(false);
+            .unwrap_or_default()
-                let enter_hook = c.enter_hook.clone();
+    }
-                ConfigClient {
+
-                    ips,
+    /// path to certificate
-                    hostname,
+    pub fn cert_path(&self) -> &Path {
-                    port,
+        &self.cert_path
-                    pos: *pos,
+    }
-                    active,
+
-                    enter_hook,
+    /// 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())
+            .unwrap_or_default()
+            .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/emulation.rs

@@ -1,4 +1,4 @@
-use crate::listen::{LanMouseListener, ListenerCreationError};
+use crate::listen::{LanMouseListener, ListenEvent, ListenerCreationError};
 use futures::StreamExt;
 use input_emulation::{EmulationHandle, InputEmulation, InputEmulationError};
 use input_event::Event;
@@ -24,8 +24,15 @@ pub(crate) struct Emulation {
 }
 
 pub(crate) enum EmulationEvent {
-    /// new connection
     Connected {
+        addr: SocketAddr,
+        fingerprint: String,
+    },
+    ConnectionAttempt {
+        fingerprint: String,
+    },
+    /// new connection
+    Entered {
         /// address of the connection
         addr: SocketAddr,
         /// position of the connection
@@ -34,7 +41,9 @@ pub(crate) enum EmulationEvent {
         fingerprint: String,
     },
     /// connection closed
-    Disconnected { addr: SocketAddr },
+    Disconnected {
+        addr: SocketAddr,
+    },
     /// the port of the listener has changed
     PortChanged(Result<u16, ListenerCreationError>),
     /// emulation was disabled
@@ -121,31 +130,36 @@ impl ListenTask {
         let mut last_response = HashMap::new();
         loop {
             select! {
-                e = self.listener.next() =>  {
+                e = self.listener.next() => {match e {
-                    let (event, addr) = match e {
+                    Some(ListenEvent::Msg { event, addr }) => {
-                        Some(e) => e,
+                        log::trace!("{event} <-<-<-<-<- {addr}");
-                        None => break,
+                        last_response.insert(addr, Instant::now());
-                    };
+                        match event {
-                    log::trace!("{event} <-<-<-<-<- {addr}");
+                            ProtoEvent::Enter(pos) => {
-                    last_response.insert(addr, Instant::now());
+                                if let Some(fingerprint) = self.listener.get_certificate_fingerprint(addr).await {
-                    match event {
+                                    log::info!("releasing capture: {addr} entered this device");
-                        ProtoEvent::Enter(pos) => {
+                                    self.event_tx.send(EmulationEvent::ReleaseNotify).expect("channel closed");
-                            if let Some(fingerprint) = self.listener.get_certificate_fingerprint(addr).await {
+                                    self.listener.reply(addr, ProtoEvent::Ack(0)).await;
-                                log::info!("releasing capture: {addr} entered this device");
+                                    self.event_tx.send(EmulationEvent::Entered{addr, pos: to_ipc_pos(pos), fingerprint}).expect("channel closed");
-                                self.event_tx.send(EmulationEvent::ReleaseNotify).expect("channel closed");
+                                }
-                                self.listener.reply(addr, ProtoEvent::Ack(0)).await;
-                                self.event_tx.send(EmulationEvent::Connected{addr, pos: to_ipc_pos(pos), fingerprint}).expect("channel closed");
                             }
+                            ProtoEvent::Leave(_) => {
+                                self.emulation_proxy.remove(addr);
+                                self.listener.reply(addr, ProtoEvent::Ack(0)).await;
+                            }
+                            ProtoEvent::Input(event) => self.emulation_proxy.consume(event, addr),
+                            ProtoEvent::Ping => self.listener.reply(addr, ProtoEvent::Pong(self.emulation_proxy.emulation_active.get())).await,
+                            _ => {}
                         }
-                        ProtoEvent::Leave(_) => {
-                            self.emulation_proxy.remove(addr);
-                            self.listener.reply(addr, ProtoEvent::Ack(0)).await;
-                        }
-                        ProtoEvent::Input(event) => self.emulation_proxy.consume(event, addr),
-                        ProtoEvent::Ping => self.listener.reply(addr, ProtoEvent::Pong(self.emulation_proxy.emulation_active.get())).await,
-                        _ => {}
                     }
-                }
+                    Some(ListenEvent::Accept { addr, fingerprint }) => {
+                        self.event_tx.send(EmulationEvent::Connected { addr, fingerprint }).expect("channel closed");
+                    }
+                    Some(ListenEvent::Rejected { fingerprint }) => {
+                        self.event_tx.send(EmulationEvent::ConnectionAttempt { fingerprint }).expect("channel closed");
+                    }
+                    None => break
+                }}
                 event = self.emulation_proxy.event() => {
                     self.event_tx.send(event).expect("channel closed");
                 }

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/listen.rs

@@ -3,15 +3,15 @@ use lan_mouse_proto::{ProtoEvent, MAX_EVENT_SIZE};
 use local_channel::mpsc::{channel, Receiver, Sender};
 use rustls::pki_types::CertificateDer;
 use std::{
-    collections::HashMap,
+    collections::{HashMap, VecDeque},
     net::SocketAddr,
     rc::Rc,
-    sync::{Arc, RwLock},
+    sync::{Arc, Mutex, RwLock},
     time::Duration,
 };
 use thiserror::Error;
 use tokio::{
-    sync::Mutex,
+    sync::Mutex as AsyncMutex,
     task::{spawn_local, JoinHandle},
 };
 use webrtc_dtls::{
@@ -34,11 +34,25 @@ pub enum ListenerCreationError {
 
 type ArcConn = Arc<dyn Conn + Send + Sync>;
 
+pub(crate) enum ListenEvent {
+    Msg {
+        event: ProtoEvent,
+        addr: SocketAddr,
+    },
+    Accept {
+        addr: SocketAddr,
+        fingerprint: String,
+    },
+    Rejected {
+        fingerprint: String,
+    },
+}
+
 pub(crate) struct LanMouseListener {
-    listen_rx: Receiver<(ProtoEvent, SocketAddr)>,
+    listen_rx: Receiver<ListenEvent>,
-    listen_tx: Sender<(ProtoEvent, SocketAddr)>,
+    listen_tx: Sender<ListenEvent>,
     listen_task: JoinHandle<()>,
-    conns: Rc<Mutex<Vec<(SocketAddr, ArcConn)>>>,
+    conns: Rc<AsyncMutex<Vec<(SocketAddr, ArcConn)>>>,
     request_port_change: Sender<u16>,
     port_changed: Receiver<Result<u16, ListenerCreationError>>,
 }
@@ -58,26 +72,35 @@ impl LanMouseListener {
         let (listen_tx, listen_rx) = channel();
         let (request_port_change, mut request_port_change_rx) = channel();
         let (port_changed_tx, port_changed) = channel();
+        let connection_attempts: Arc<Mutex<VecDeque<String>>> = Default::default();
 
         let authorized = authorized_keys.clone();
-        let verify_peer_certificate: Option<VerifyPeerCertificateFn> = Some(Arc::new(
+        let verify_peer_certificate: Option<VerifyPeerCertificateFn> = {
-            move |certs: &[Vec<u8>], _chains: &[CertificateDer<'static>]| {
+            let connection_attempts = connection_attempts.clone();
-                assert!(certs.len() == 1);
+            Some(Arc::new(
-                let fingerprints = certs
+                move |certs: &[Vec<u8>], _chains: &[CertificateDer<'static>]| {
-                    .iter()
+                    assert!(certs.len() == 1);
-                    .map(|c| crypto::generate_fingerprint(c))
+                    let fingerprints = certs
-                    .collect::<Vec<_>>();
+                        .iter()
-                if authorized
+                        .map(|c| crypto::generate_fingerprint(c))
-                    .read()
+                        .collect::<Vec<_>>();
-                    .expect("lock")
+                    if authorized
-                    .contains_key(&fingerprints[0])
+                        .read()
-                {
+                        .expect("lock")
-                    Ok(())
+                        .contains_key(&fingerprints[0])
-                } else {
+                    {
-                    Err(webrtc_dtls::Error::ErrVerifyDataMismatch)
+                        Ok(())
-                }
+                    } else {
-            },
+                        let fingerprint = fingerprints.into_iter().next().expect("fingerprint");
-        ));
+                        connection_attempts
+                            .lock()
+                            .expect("lock")
+                            .push_back(fingerprint);
+                        Err(webrtc_dtls::Error::ErrVerifyDataMismatch)
+                    }
+                },
+            ))
+        };
         let cfg = Config {
             certificates: vec![cert.clone()],
             extended_master_secret: ExtendedMasterSecretType::Require,
@@ -89,43 +112,69 @@ impl LanMouseListener {
         let listen_addr = SocketAddr::new("0.0.0.0".parse().expect("invalid ip"), port);
         let mut listener = listen(listen_addr, cfg.clone()).await?;
 
-        let conns: Rc<Mutex<Vec<(SocketAddr, ArcConn)>>> = Rc::new(Mutex::new(Vec::new()));
+        let conns: Rc<AsyncMutex<Vec<(SocketAddr, ArcConn)>>> =
+            Rc::new(AsyncMutex::new(Vec::new()));
 
         let conns_clone = conns.clone();
-        let tx = listen_tx.clone();
+        let listen_task: JoinHandle<()> = {
-        let listen_task: JoinHandle<()> = spawn_local(async move {
+            let listen_tx = listen_tx.clone();
-            loop {
+            let connection_attempts = connection_attempts.clone();
-                let sleep = tokio::time::sleep(Duration::from_secs(2));
+            spawn_local(async move {
-                tokio::select! {
+                loop {
-                    /* workaround for https://github.com/webrtc-rs/webrtc/issues/614 */
+                    let sleep = tokio::time::sleep(Duration::from_secs(2));
-                    _ = sleep => continue,
+                    tokio::select! {
-                    c = listener.accept() => match c {
+                        /* workaround for https://github.com/webrtc-rs/webrtc/issues/614 */
-                        Ok((conn, addr)) => {
+                        _ = sleep => continue,
-                            log::info!("dtls client connected, ip: {addr}");
+                        c = listener.accept() => match c {
-                            let mut conns = conns_clone.lock().await;
+                            Ok((conn, addr)) => {
-                            conns.push((addr, conn.clone()));
+                                log::info!("dtls client connected, ip: {addr}");
-                            spawn_local(read_loop(conns_clone.clone(), addr, conn, tx.clone()));
+                                let mut conns = conns_clone.lock().await;
-                        },
+                                conns.push((addr, conn.clone()));
-                        Err(e) => log::warn!("accept: {e}"),
+                                let dtls_conn: &DTLSConn = conn.as_any().downcast_ref().expect("dtls conn");
-                    },
+                                let certs = dtls_conn.connection_state().await.peer_certificates;
-                    port = request_port_change_rx.recv() => {
+                                let cert = certs.first().expect("cert");
-                        let port = port.expect("channel closed");
+                                let fingerprint = crypto::generate_fingerprint(cert);
-                        let listen_addr = SocketAddr::new("0.0.0.0".parse().expect("invalid ip"), port);
+                                listen_tx.send(ListenEvent::Accept { addr, fingerprint }).expect("channel closed");
-                        match listen(listen_addr, cfg.clone()).await {
+                                spawn_local(read_loop(conns_clone.clone(), addr, conn, listen_tx.clone()));
-                            Ok(new_listener) => {
+                            },
-                                let _ = listener.close().await;
-                                listener = new_listener;
-                                port_changed_tx.send(Ok(port)).expect("channel closed");
-                            }
                             Err(e) => {
-                                log::warn!("unable to change port: {e}");
+                                if let Error::Std(ref e) = e {
-                                port_changed_tx.send(Err(e.into())).expect("channel closed");
+                                    if let Some(e) = e.0.downcast_ref::<webrtc_dtls::Error>() {
+                                        match e {
+                                            webrtc_dtls::Error::ErrVerifyDataMismatch => {
+                                                if let Some(fingerprint) = connection_attempts.lock().expect("lock").pop_front() {
+                                                    listen_tx.send(ListenEvent::Rejected { fingerprint }).expect("channel closed");
+                                                }
+                                            }
+                                            _ => log::warn!("accept: {e}"),
+                                        }
+                                    } else {
+                                        log::warn!("accept: {e:?}");
+                                    }
+                                } else {
+                                    log::warn!("accept: {e:?}");
+                                }
                             }
-                        };
+                        },
-                    },
+                        port = request_port_change_rx.recv() => {
-                };
+                            let port = port.expect("channel closed");
-            }
+                            let listen_addr = SocketAddr::new("0.0.0.0".parse().expect("invalid ip"), port);
-        });
+                            match listen(listen_addr, cfg.clone()).await {
+                                Ok(new_listener) => {
+                                    let _ = listener.close().await;
+                                    listener = new_listener;
+                                    port_changed_tx.send(Ok(port)).expect("channel closed");
+                                }
+                                Err(e) => {
+                                    log::warn!("unable to change port: {e}");
+                                    port_changed_tx.send(Err(e.into())).expect("channel closed");
+                                }
+                            };
+                        },
+                    };
+                }
+            })
+        };
 
         Ok(Self {
             conns,
@@ -186,7 +235,7 @@ impl LanMouseListener {
 }
 
 impl Stream for LanMouseListener {
-    type Item = (ProtoEvent, SocketAddr);
+    type Item = ListenEvent;
 
     fn poll_next(
         mut self: std::pin::Pin<&mut Self>,
@@ -197,16 +246,18 @@ impl Stream for LanMouseListener {
 }
 
 async fn read_loop(
-    conns: Rc<Mutex<Vec<(SocketAddr, ArcConn)>>>,
+    conns: Rc<AsyncMutex<Vec<(SocketAddr, ArcConn)>>>,
     addr: SocketAddr,
     conn: ArcConn,
-    dtls_tx: Sender<(ProtoEvent, SocketAddr)>,
+    dtls_tx: Sender<ListenEvent>,
 ) -> Result<(), Error> {
     let mut b = [0u8; MAX_EVENT_SIZE];
 
     while conn.recv(&mut b).await.is_ok() {
         match b.try_into() {
-            Ok(event) => dtls_tx.send((event, addr)).expect("channel closed"),
+            Ok(event) => dtls_tx
+                .send(ListenEvent::Msg { event, addr })
+                .expect("channel closed"),
             Err(e) => {
                 log::warn!("error receiving event: {e}");
                 break;

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::Config::new()?;
-    let config = Config::new()?;
+    match config.command() {
-    if config.test_capture {
+        Some(command) => match command {
-        run_async(capture_test::run(config))?;
+            Command::TestEmulation(args) => run_async(emulation_test::run(config, args))?,
-    } else if config.test_emulation {
+            Command::TestCapture(args) => run_async(capture_test::run(config, args))?,
-        run_async(emulation_test::run(config))?;
+            Command::Cli(cli_args) => run_async(lan_mouse_cli::run(cli_args))?,
-    } else if config.daemon {
+            Command::Daemon => {
-        // if daemon is specified we run the service
+                // if daemon is specified we run the service
-        match run_async(run_service(config)) {
+                match run_async(run_service(config)) {
-            Err(LanMouseError::Service(ServiceError::IpcListen(
+                    Err(LanMouseError::Service(ServiceError::IpcListen(
-                IpcListenerCreationError::AlreadyRunning,
+                        IpcListenerCreationError::AlreadyRunning,
-            ))) => log::info!("service already running!"),
+                    ))) => log::info!("service already running!"),
-            r => r?,
+                    r => r?,
-        }
+                }
-    } else {
+            }
-        //  otherwise start the service as a child process and
+        },
-        //  run a frontend
+        None => {
-        let mut service = start_service()?;
+            //  otherwise start the service as a child process and
-        run_frontend(&config)?;
+            //  run a frontend
-        #[cfg(unix)]
+            #[cfg(feature = "gtk")]
-        {
+            {
-            // on unix we give the service a chance to terminate gracefully
+                let mut service = start_service()?;
-            let pid = service.id() as libc::pid_t;
+                let res = lan_mouse_gtk::run();
-            unsafe {
+                #[cfg(unix)]
-                libc::kill(pid, libc::SIGINT);
+                {
+                    // 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);
+    let release_bind = config.release_bind();
-    log::info!("Press {:?} to release the mouse", 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_backend = config.capture_backend().map(|b| b.into());
-        let capture = Capture::new(capture_backend, conn, config.release_bind.clone());
+        let capture = Capture::new(capture_backend, conn, config.release_bind());
-        let emulation_backend = config.emulation_backend.map(|b| b.into());
+        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);
         }
 
@@ -193,6 +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)
+            }
         }
     }
 
@@ -204,7 +211,10 @@ impl Service {
 
     fn handle_emulation_event(&mut self, event: EmulationEvent) {
         match event {
-            EmulationEvent::Connected {
+            EmulationEvent::ConnectionAttempt { fingerprint } => {
+                self.notify_frontend(FrontendEvent::ConnectionAttempt { fingerprint });
+            }
+            EmulationEvent::Entered {
                 addr,
                 pos,
                 fingerprint,
@@ -212,7 +222,11 @@ impl Service {
                 // check if already registered
                 if !self.incoming_conns.contains(&addr) {
                     self.add_incoming(addr, pos, fingerprint.clone());
-                    self.notify_frontend(FrontendEvent::IncomingConnected(fingerprint, addr, pos));
+                    self.notify_frontend(FrontendEvent::DeviceEntered {
+                        fingerprint,
+                        addr,
+                        pos,
+                    });
                 } else {
                     self.update_incoming(addr, pos, fingerprint);
                 }
@@ -239,6 +253,9 @@ impl Service {
                 self.notify_frontend(FrontendEvent::EmulationStatus(self.emulation_status));
             }
             EmulationEvent::ReleaseNotify => self.capture.release(),
+            EmulationEvent::Connected { addr, fingerprint } => {
+                self.notify_frontend(FrontendEvent::DeviceConnected { addr, fingerprint });
+            }
         }
     }
 
@@ -340,7 +357,11 @@ impl Service {
             self.remove_incoming(addr);
             self.add_incoming(addr, pos, fingerprint.clone());
             self.notify_frontend(FrontendEvent::IncomingDisconnected(addr));
-            self.notify_frontend(FrontendEvent::IncomingConnected(fingerprint, addr, pos));
+            self.notify_frontend(FrontendEvent::DeviceEntered {
+                fingerprint,
+                addr,
+                pos,
+            });
         }
     }
 
@@ -476,6 +497,11 @@ impl Service {
         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) {
         let event = self
             .client_manager