lan discovery will be done soon

Signed-off-by: fufesou <shuanglongchen@yeah.net>

src/ipc.rs

@@ -90,6 +90,7 @@ pub enum Data {
     ConfirmedKey(Option<(Vec<u8>, Vec<u8>)>),
     RawMessage(Vec<u8>),
     FS(FS),
+    SessionsUpdated,
     Test,
 }
 

src/server.rs

@@ -28,6 +28,7 @@ mod connection;
 pub mod input_service;
 mod service;
 mod video_service;
+mod udp;
 
 use hbb_common::tcp::new_listener;
 
@@ -261,6 +262,7 @@ pub fn check_zombie() {
 
 #[tokio::main]
 pub async fn start_server(is_server: bool, _tray: bool) {
+    // TODO: Add a graceful shutdown handler, and attach all servers to that handler.
     #[cfg(target_os = "linux")]
     {
         log::info!("DISPLAY={:?}", std::env::var("DISPLAY"));
@@ -273,6 +275,13 @@ pub async fn start_server(is_server: bool, _tray: bool) {
                 std::process::exit(-1);
             }
         });
+        let _server_guard = match udp::start_udp_server().await {
+            Ok(s) => Some(s),
+            Err(e) => {
+                log::warn!("Failed to start udp server {}", e);
+                None
+            }
+        };
         input_service::fix_key_down_timeout_loop();
         crate::RendezvousMediator::start_all().await;
     } else {

src/server/udp.rs

@@ -0,0 +1,105 @@
+/// udp server
+///
+/// eg. discovery
+///
+use hbb_common::{base_proto::PeerInfo, config::SERVER_UDP_PORT, ResultType};
+use socket_cs::udp::{Server, UdpHandlers};
+
+/// Simple copy from ../connections.rs#send_logon_response
+/// Should be merged into one function.
+fn get_peer_info() -> PeerInfo {
+    let username = crate::platform::get_active_username();
+    #[allow(unused_mut)]
+    let mut sas_enabled = false;
+    #[cfg(windows)]
+    if crate::platform::is_root() {
+        sas_enabled = true;
+    }
+    PeerInfo {
+        hostname: whoami::hostname(),
+        username,
+        platform: whoami::platform().to_string(),
+        version: crate::VERSION.to_owned(),
+        sas_enabled,
+        ..Default::default()
+    }
+}
+
+mod discovery {
+    use super::get_peer_info;
+    use crate::ipc;
+    use hbb_common::{
+        base_proto::PeerInfo,
+        config::{PeerConfig, PeerInfoSerde},
+        discovery_proto::{Discovery as DiscoveryProto, DiscoveryBack as DiscoveryBackProto},
+        log, protobuf,
+        tokio::runtime::Runtime,
+        ResultType,
+    };
+    use socket_cs::{discovery::*, udp::UdpHandlers};
+
+    fn get_discovery_back_info() -> DiscoveryBackProto {
+        let peer = get_peer_info();
+        DiscoveryBackProto {
+            id: ipc::get_id(),
+            peer: protobuf::MessageField::from_option(Some(peer)),
+            ..Default::default()
+        }
+    }
+
+    fn process_discovery_back(info: DiscoveryBackProto) {
+        let mut config = PeerConfig::load(info.id.as_str());
+
+        let peer = info.peer.as_ref().unwrap();
+        let serde = PeerInfoSerde {
+            username: peer.username.clone(),
+            hostname: peer.hostname.clone(),
+            platform: peer.platform.clone(),
+        };
+        config.info = serde;
+        config.store(info.id.as_str());
+
+        let rt = match Runtime::new() {
+            Ok(r) => r,
+            Err(e) => {
+                log::error!("Failed to notify index window, {}", e);
+                return;
+            }
+        };
+
+        async fn notify_index_window() -> ResultType<()> {
+            let ms_timeout = 1000;
+            let mut c = ipc::connect(ms_timeout, "_index").await?;
+            c.send(&ipc::Data::SessionsUpdated).await?;
+            Ok(())
+        }
+        rt.block_on(async move {
+            if let Err(e) = notify_index_window().await {
+                log::error!("Failed to notify index window, {}", e);
+            }
+        });
+    }
+
+    // pub(crate) fn lan_discover();
+
+    pub(super) fn handle_discovery(handlers: UdpHandlers) -> UdpHandlers {
+        let info = get_discovery_back_info();
+        handlers
+            .handle(
+                CMD_DISCOVERY.as_bytes().to_vec(),
+                Box::new(HandlerDiscovery::new(Some(|| true), info)),
+            )
+            .handle(
+                CMD_DISCOVERY_BACK.as_bytes().to_vec(),
+                Box::new(HandlerDiscoveryBack::new(process_discovery_back)),
+            )
+    }
+}
+
+pub(super) async fn start_udp_server() -> ResultType<Server> {
+    let handlers = discovery::handle_discovery(UdpHandlers::new());
+
+    let mut server = Server::create(SERVER_UDP_PORT)?;
+    server.start(handlers).await?;
+    Ok(server)
+}

src/ui.rs

@@ -86,6 +86,8 @@ pub fn start(args: &mut [String]) {
         let childs: Childs = Default::default();
         let cloned = childs.clone();
         std::thread::spawn(move || check_zombie(cloned));
+        let cloned = childs.clone();
+        tokio::spawn(async move {start_ipc(cloned)});
         crate::common::check_software_update();
         frame.event_handler(UI::new(childs));
         frame.sciter_handler(UIHostHandler {});
@@ -644,6 +646,55 @@ pub fn check_zombie(childs: Childs) {
     }
 }
 
+// TODO: Duplicated code.
+// Need more generic and better shutdown handler
+#[tokio::main(flavor = "current_thread")]
+async fn start_ipc(childs: Childs) {
+    match ipc::new_listener("_index").await {
+        Ok(mut incoming) => {
+            while let Some(result) = incoming.next().await {
+                match result {
+                    Ok(stream) => {
+                        let mut stream = ipc::Connection::new(stream);
+                        let childs = childs.clone();
+                        tokio::spawn(async move {
+                            loop {
+                                tokio::select! {
+                                    res = stream.next() => {
+                                        match res {
+                                            Err(err) => {
+                                                log::info!("cm ipc connection closed: {}", err);
+                                                break;
+                                            }
+                                            Ok(Some(data)) => {
+                                                match data {
+                                                    ipc::Data::SessionsUpdated => {
+                                                        childs.lock().unwrap().0 = true;
+                                                    }
+                                                    _ => {
+                                                    }
+                                                }
+                                            }
+                                            _ => {}
+                                        }
+                                    }
+                                }
+                            }
+                        });
+                    }
+                    Err(err) => {
+                        log::error!("Couldn't get index client: {:?}", err);
+                    }
+                }
+            }
+        }
+        Err(err) => {
+            log::error!("Failed to start index ipc server: {}", err);
+        }
+    }
+    std::process::exit(-1);
+}
+
 // notice: avoiding create ipc connection repeatedly,
 // because windows named pipe has serious memory leak issue.
 #[tokio::main(flavor = "current_thread")]