spawn GRPC server at daemon start

burrow/Cargo.toml

@@ -58,6 +58,11 @@ reqwest = { version = "0.12", default-features = false, features = [
 ] }
 rusqlite = "0.31.0"
 dotenv = "0.15.0"
+tonic = "0.12.0"
+prost = "0.13.1"
+prost-types = "0.13.1"
+tokio-stream = "0.1"
+async-stream = "0.2"
 
 [target.'cfg(target_os = "linux")'.dependencies]
 caps = "0.5"
@@ -83,3 +88,7 @@ pre_uninstall_script = "../package/rpm/pre_uninstall"
 [features]
 tokio-console = ["dep:console-subscriber"]
 bundled = ["rusqlite/bundled"]
+
+
+[build-dependencies]
+tonic-build = "0.12.0"

burrow/build.rs

@@ -0,0 +1,4 @@
+fn main() -> Result<(), Box<dyn std::error::Error>> {
+    tonic_build::compile_protos("../proto/burrow.proto")?;
+    Ok(())
+}

burrow/src/daemon/instance.rs

@@ -10,19 +10,24 @@ use tun::tokio::TunInterface;
 
 use crate::{
     daemon::rpc::{
-        DaemonCommand,
-        DaemonNotification,
-        DaemonResponse,
-        DaemonResponseData,
-        ServerConfig,
+        DaemonCommand, DaemonNotification, DaemonResponse, DaemonResponseData, ServerConfig,
         ServerInfo,
     },
     database::{get_connection, load_interface},
     wireguard::{Config, Interface},
 };
 
+use tonic::{Request, Response, Status as RspStatus};
+
+use super::rpc::grpc_defs::{
+    tunnel_server::Tunnel, Empty, TunnelConfigurationResponse, TunnelStatusResponse,
+    WireGuardNetwork, WireGuardPeer,
+};
+use tokio_stream::{wrappers::ReceiverStream, Stream};
+
+#[derive(Debug, Clone)]
 enum RunState {
-    Running(JoinHandle<Result<()>>),
+    Running,
     Idle,
 }
 
@@ -63,7 +68,7 @@ impl DaemonInstance {
         match command {
             DaemonCommand::Start(st) => {
                 match self.wg_state {
-                    RunState::Running(_) => {
+                    RunState::Running => {
                         warn!("Got start, but tun interface already up.");
                     }
                     RunState::Idle => {
@@ -82,7 +87,7 @@ impl DaemonInstance {
                             let twlock = tmp_wg.read().await;
                             twlock.run().await
                         });
-                        self.wg_state = RunState::Running(run_task);
+                        self.wg_state = RunState::Running;
                         info!("Daemon started tun interface");
                     }
                 }
@@ -128,3 +133,55 @@ impl DaemonInstance {
         Ok(())
     }
 }
+
+#[derive(Clone)]
+pub struct DaemonRPCServer {
+    tun_interface: Arc<RwLock<Option<TunInterface>>>,
+    wg_interface: Arc<RwLock<Interface>>,
+    config: Arc<RwLock<Config>>,
+    db_path: Option<PathBuf>,
+    wg_state: RunState,
+}
+
+impl DaemonRPCServer {
+    pub fn new(
+        wg_interface: Arc<RwLock<Interface>>,
+        config: Arc<RwLock<Config>>,
+        db_path: Option<&Path>,
+    ) -> Self {
+        Self {
+            tun_interface: Arc::new(RwLock::new(None)),
+            wg_interface,
+            config,
+            db_path: db_path.map(|p| p.to_owned()),
+            wg_state: RunState::Idle,
+        }
+    }
+}
+
+#[tonic::async_trait]
+impl Tunnel for DaemonRPCServer {
+    async fn tunnel_configuration(
+        &self,
+        _request: Request<Empty>,
+    ) -> Result<Response<TunnelConfigurationResponse>, RspStatus> {
+        unimplemented!()
+    }
+
+    async fn tunnel_start(&self, _request: Request<Empty>) -> Result<Response<Empty>, RspStatus> {
+        return Ok(Response::new(Empty {}));
+    }
+
+    async fn tunnel_stop(&self, _request: Request<Empty>) -> Result<Response<Empty>, RspStatus> {
+        return Ok(Response::new(Empty {}));
+    }
+
+    type TunnelStatusStream = ReceiverStream<Result<TunnelStatusResponse, RspStatus>>;
+
+    async fn tunnel_status(
+        &self,
+        _request: Request<Empty>,
+    ) -> Result<Response<Self::TunnelStatusStream>, RspStatus> {
+        unimplemented!()
+    }
+}

burrow/src/daemon/mod.rs

@@ -5,11 +5,18 @@ mod instance;
 mod net;
 pub mod rpc;
 
+use crate::daemon::rpc::grpc_defs::tunnel_server::TunnelServer;
+use anyhow::Error as AhError;
 use anyhow::Result;
-use instance::DaemonInstance;
+use instance::{DaemonInstance, DaemonRPCServer};
 pub use net::{DaemonClient, Listener};
 pub use rpc::{DaemonCommand, DaemonResponseData, DaemonStartOptions};
-use tokio::sync::{Notify, RwLock};
+use tokio::{
+    net::UnixListener,
+    sync::{Notify, RwLock},
+};
+use tokio_stream::wrappers::UnixListenerStream;
+use tonic::transport::Server;
 use tracing::{error, info};
 
 use crate::{
@@ -45,9 +52,25 @@ pub async fn daemon_main(
         response_tx,
         subscribe_tx,
         Arc::new(RwLock::new(iface)),
-        Arc::new(RwLock::new(config)),
-        db_path,
+        Arc::new(RwLock::new(config.clone())),
+        db_path.clone(),
     );
+    let dbp = db_path.clone();
+    let burrow_server = DaemonRPCServer::new(
+        Arc::new(RwLock::new(config.clone().try_into()?)),
+        Arc::new(RwLock::new(config)),
+        dbp,
+    );
+    let spp = socket_path.clone();
+    let uds = UnixListener::bind(spp.unwrap())?;
+    let serve_job = tokio::spawn(async move {
+        let uds_stream = UnixListenerStream::new(uds);
+        let srv = Server::builder()
+            .add_service(TunnelServer::new(burrow_server))
+            .serve_with_incoming(uds_stream)
+            .await?;
+        Ok::<(), AhError>(())
+    });
 
     info!("Starting daemon...");
 
@@ -67,7 +90,7 @@ pub async fn daemon_main(
         result
     });
 
-    tokio::try_join!(main_job, listener_job)
+    tokio::try_join!(main_job, listener_job, serve_job)
         .map(|_| ())
         .map_err(|e| e.into())
 }

burrow/src/daemon/net/unix.rs

@@ -11,11 +11,7 @@ use tokio::{
 use tracing::{debug, error, info};
 
 use crate::daemon::rpc::{
-    DaemonCommand,
-    DaemonMessage,
-    DaemonNotification,
-    DaemonRequest,
-    DaemonResponse,
+    DaemonCommand, DaemonMessage, DaemonNotification, DaemonRequest, DaemonResponse,
     DaemonResponseData,
 };
 
@@ -36,7 +32,7 @@ pub struct Listener {
     cmd_tx: async_channel::Sender<DaemonCommand>,
     rsp_rx: async_channel::Receiver<DaemonResponse>,
     sub_chan: async_channel::Receiver<DaemonNotification>,
-    inner: UnixListener,
+    pub inner: UnixListener,
 }
 
 impl Listener {

burrow/src/daemon/rpc/grpc_defs.rs

@@ -0,0 +1,5 @@
+pub use burrowgrpc::*;
+
+mod burrowgrpc {
+    tonic::include_proto!("burrow");
+}

burrow/src/daemon/rpc/mod.rs

@@ -1,3 +1,4 @@
+pub mod grpc_defs;
 pub mod notification;
 pub mod request;
 pub mod response;