impl emulation stuff

src/connect.rs

@@ -0,0 +1,39 @@
+use std::{io, net::SocketAddr, sync::Arc};
+use thiserror::Error;
+use tokio::net::UdpSocket;
+use webrtc_dtls::{
+    config::{Config, ExtendedMasterSecretType},
+    conn::DTLSConn,
+    crypto::Certificate,
+};
+use webrtc_util::Conn;
+
+#[derive(Debug, Error)]
+pub(crate) enum LanMouseConnectionError {
+    #[error(transparent)]
+    Bind(#[from] io::Error),
+    #[error(transparent)]
+    Dtls(#[from] webrtc_dtls::Error),
+}
+
+pub(crate) struct LanMouseConnection {}
+
+impl LanMouseConnection {
+    pub(crate) async fn connect(
+        addr: SocketAddr,
+    ) -> Result<Arc<dyn Conn + Sync + Send>, LanMouseConnectionError> {
+        let conn = Arc::new(UdpSocket::bind("0.0.0.0:0").await?);
+        conn.connect(addr).await;
+        log::info!("connected to {addr}, establishing secure dtls channel ...");
+        let certificate = Certificate::generate_self_signed(["localhost".to_owned()])?;
+        let config = Config {
+            certificates: vec![certificate],
+            insecure_skip_verify: true,
+            extended_master_secret: ExtendedMasterSecretType::Require,
+            ..Default::default()
+        };
+        let dtls_conn: Arc<dyn Conn + Send + Sync> =
+            Arc::new(DTLSConn::new(conn, config, true, None).await?);
+        Ok(dtls_conn)
+    }
+}