1use crate::{
2 json_log::LogRecord,
3 protocol::{
4 message_len_from_buffer, read_message_with_len, write_message, MessageId, MESSAGE_LEN_SIZE,
5 },
6 proxy::ProxyLaunchError,
7};
8use anyhow::{anyhow, Context as _, Result};
9use collections::HashMap;
10use futures::{
11 channel::{
12 mpsc::{self, Sender, UnboundedReceiver, UnboundedSender},
13 oneshot,
14 },
15 future::BoxFuture,
16 select_biased, AsyncReadExt as _, AsyncWriteExt as _, Future, FutureExt as _, SinkExt,
17 StreamExt as _,
18};
19use gpui::{
20 AppContext, AsyncAppContext, Context, EventEmitter, Model, ModelContext, SemanticVersion, Task,
21 WeakModel,
22};
23use parking_lot::Mutex;
24use rpc::{
25 proto::{self, build_typed_envelope, Envelope, EnvelopedMessage, PeerId, RequestMessage},
26 AnyProtoClient, EntityMessageSubscriber, ProtoClient, ProtoMessageHandlerSet, RpcError,
27};
28use smol::{
29 fs,
30 process::{self, Child, Stdio},
31};
32use std::{
33 any::TypeId,
34 ffi::OsStr,
35 fmt,
36 ops::ControlFlow,
37 path::{Path, PathBuf},
38 sync::{
39 atomic::{AtomicU32, Ordering::SeqCst},
40 Arc,
41 },
42 time::{Duration, Instant},
43};
44use tempfile::TempDir;
45use util::ResultExt;
46
47#[derive(
48 Debug, PartialEq, Eq, PartialOrd, Ord, Hash, Clone, Copy, serde::Serialize, serde::Deserialize,
49)]
50pub struct SshProjectId(pub u64);
51
52#[derive(Clone)]
53pub struct SshSocket {
54 connection_options: SshConnectionOptions,
55 socket_path: PathBuf,
56}
57
58#[derive(Debug, Default, Clone, PartialEq, Eq)]
59pub struct SshConnectionOptions {
60 pub host: String,
61 pub username: Option<String>,
62 pub port: Option<u16>,
63 pub password: Option<String>,
64}
65
66impl SshConnectionOptions {
67 pub fn ssh_url(&self) -> String {
68 let mut result = String::from("ssh://");
69 if let Some(username) = &self.username {
70 result.push_str(username);
71 result.push('@');
72 }
73 result.push_str(&self.host);
74 if let Some(port) = self.port {
75 result.push(':');
76 result.push_str(&port.to_string());
77 }
78 result
79 }
80
81 fn scp_url(&self) -> String {
82 if let Some(username) = &self.username {
83 format!("{}@{}", username, self.host)
84 } else {
85 self.host.clone()
86 }
87 }
88
89 pub fn connection_string(&self) -> String {
90 let host = if let Some(username) = &self.username {
91 format!("{}@{}", username, self.host)
92 } else {
93 self.host.clone()
94 };
95 if let Some(port) = &self.port {
96 format!("{}:{}", host, port)
97 } else {
98 host
99 }
100 }
101
102 // Uniquely identifies dev server projects on a remote host. Needs to be
103 // stable for the same dev server project.
104 pub fn dev_server_identifier(&self) -> String {
105 let mut identifier = format!("dev-server-{:?}", self.host);
106 if let Some(username) = self.username.as_ref() {
107 identifier.push('-');
108 identifier.push_str(&username);
109 }
110 identifier
111 }
112}
113
114#[derive(Copy, Clone, Debug)]
115pub struct SshPlatform {
116 pub os: &'static str,
117 pub arch: &'static str,
118}
119
120impl SshPlatform {
121 pub fn triple(&self) -> Option<String> {
122 Some(format!(
123 "{}-{}",
124 self.arch,
125 match self.os {
126 "linux" => "unknown-linux-gnu",
127 "macos" => "apple-darwin",
128 _ => return None,
129 }
130 ))
131 }
132}
133
134pub trait SshClientDelegate: Send + Sync {
135 fn ask_password(
136 &self,
137 prompt: String,
138 cx: &mut AsyncAppContext,
139 ) -> oneshot::Receiver<Result<String>>;
140 fn remote_server_binary_path(
141 &self,
142 platform: SshPlatform,
143 cx: &mut AsyncAppContext,
144 ) -> Result<PathBuf>;
145 fn get_server_binary(
146 &self,
147 platform: SshPlatform,
148 cx: &mut AsyncAppContext,
149 ) -> oneshot::Receiver<Result<(PathBuf, SemanticVersion)>>;
150 fn set_status(&self, status: Option<&str>, cx: &mut AsyncAppContext);
151 fn set_error(&self, error_message: String, cx: &mut AsyncAppContext);
152}
153
154impl SshSocket {
155 fn ssh_command<S: AsRef<OsStr>>(&self, program: S) -> process::Command {
156 let mut command = process::Command::new("ssh");
157 self.ssh_options(&mut command)
158 .arg(self.connection_options.ssh_url())
159 .arg(program);
160 command
161 }
162
163 fn ssh_options<'a>(&self, command: &'a mut process::Command) -> &'a mut process::Command {
164 command
165 .stdin(Stdio::piped())
166 .stdout(Stdio::piped())
167 .stderr(Stdio::piped())
168 .args(["-o", "ControlMaster=no", "-o"])
169 .arg(format!("ControlPath={}", self.socket_path.display()))
170 }
171
172 fn ssh_args(&self) -> Vec<String> {
173 vec![
174 "-o".to_string(),
175 "ControlMaster=no".to_string(),
176 "-o".to_string(),
177 format!("ControlPath={}", self.socket_path.display()),
178 self.connection_options.ssh_url(),
179 ]
180 }
181}
182
183async fn run_cmd(command: &mut process::Command) -> Result<String> {
184 let output = command.output().await?;
185 if output.status.success() {
186 Ok(String::from_utf8_lossy(&output.stdout).to_string())
187 } else {
188 Err(anyhow!(
189 "failed to run command: {}",
190 String::from_utf8_lossy(&output.stderr)
191 ))
192 }
193}
194
195struct ChannelForwarder {
196 quit_tx: UnboundedSender<()>,
197 forwarding_task: Task<(UnboundedSender<Envelope>, UnboundedReceiver<Envelope>)>,
198}
199
200impl ChannelForwarder {
201 fn new(
202 mut incoming_tx: UnboundedSender<Envelope>,
203 mut outgoing_rx: UnboundedReceiver<Envelope>,
204 cx: &AsyncAppContext,
205 ) -> (Self, UnboundedSender<Envelope>, UnboundedReceiver<Envelope>) {
206 let (quit_tx, mut quit_rx) = mpsc::unbounded::<()>();
207
208 let (proxy_incoming_tx, mut proxy_incoming_rx) = mpsc::unbounded::<Envelope>();
209 let (mut proxy_outgoing_tx, proxy_outgoing_rx) = mpsc::unbounded::<Envelope>();
210
211 let forwarding_task = cx.background_executor().spawn(async move {
212 loop {
213 select_biased! {
214 _ = quit_rx.next().fuse() => {
215 break;
216 },
217 incoming_envelope = proxy_incoming_rx.next().fuse() => {
218 if let Some(envelope) = incoming_envelope {
219 if incoming_tx.send(envelope).await.is_err() {
220 break;
221 }
222 } else {
223 break;
224 }
225 }
226 outgoing_envelope = outgoing_rx.next().fuse() => {
227 if let Some(envelope) = outgoing_envelope {
228 if proxy_outgoing_tx.send(envelope).await.is_err() {
229 break;
230 }
231 } else {
232 break;
233 }
234 }
235 }
236 }
237
238 (incoming_tx, outgoing_rx)
239 });
240
241 (
242 Self {
243 forwarding_task,
244 quit_tx,
245 },
246 proxy_incoming_tx,
247 proxy_outgoing_rx,
248 )
249 }
250
251 async fn into_channels(mut self) -> (UnboundedSender<Envelope>, UnboundedReceiver<Envelope>) {
252 let _ = self.quit_tx.send(()).await;
253 self.forwarding_task.await
254 }
255}
256
257const MAX_MISSED_HEARTBEATS: usize = 5;
258const HEARTBEAT_INTERVAL: Duration = Duration::from_secs(5);
259const HEARTBEAT_TIMEOUT: Duration = Duration::from_secs(5);
260
261const MAX_RECONNECT_ATTEMPTS: usize = 3;
262
263enum State {
264 Connecting,
265 Connected {
266 ssh_connection: SshRemoteConnection,
267 delegate: Arc<dyn SshClientDelegate>,
268 forwarder: ChannelForwarder,
269
270 multiplex_task: Task<Result<()>>,
271 heartbeat_task: Task<Result<()>>,
272 },
273 HeartbeatMissed {
274 missed_heartbeats: usize,
275
276 ssh_connection: SshRemoteConnection,
277 delegate: Arc<dyn SshClientDelegate>,
278 forwarder: ChannelForwarder,
279
280 multiplex_task: Task<Result<()>>,
281 heartbeat_task: Task<Result<()>>,
282 },
283 Reconnecting,
284 ReconnectFailed {
285 ssh_connection: SshRemoteConnection,
286 delegate: Arc<dyn SshClientDelegate>,
287 forwarder: ChannelForwarder,
288
289 error: anyhow::Error,
290 attempts: usize,
291 },
292 ReconnectExhausted,
293 ServerNotRunning,
294}
295
296impl fmt::Display for State {
297 fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
298 match self {
299 Self::Connecting => write!(f, "connecting"),
300 Self::Connected { .. } => write!(f, "connected"),
301 Self::Reconnecting => write!(f, "reconnecting"),
302 Self::ReconnectFailed { .. } => write!(f, "reconnect failed"),
303 Self::ReconnectExhausted => write!(f, "reconnect exhausted"),
304 Self::HeartbeatMissed { .. } => write!(f, "heartbeat missed"),
305 Self::ServerNotRunning { .. } => write!(f, "server not running"),
306 }
307 }
308}
309
310impl State {
311 fn ssh_connection(&self) -> Option<&SshRemoteConnection> {
312 match self {
313 Self::Connected { ssh_connection, .. } => Some(ssh_connection),
314 Self::HeartbeatMissed { ssh_connection, .. } => Some(ssh_connection),
315 Self::ReconnectFailed { ssh_connection, .. } => Some(ssh_connection),
316 _ => None,
317 }
318 }
319
320 fn can_reconnect(&self) -> bool {
321 match self {
322 Self::Connected { .. }
323 | Self::HeartbeatMissed { .. }
324 | Self::ReconnectFailed { .. } => true,
325 State::Connecting
326 | State::Reconnecting
327 | State::ReconnectExhausted
328 | State::ServerNotRunning => false,
329 }
330 }
331
332 fn is_reconnect_failed(&self) -> bool {
333 matches!(self, Self::ReconnectFailed { .. })
334 }
335
336 fn is_reconnect_exhausted(&self) -> bool {
337 matches!(self, Self::ReconnectExhausted { .. })
338 }
339
340 fn is_reconnecting(&self) -> bool {
341 matches!(self, Self::Reconnecting { .. })
342 }
343
344 fn heartbeat_recovered(self) -> Self {
345 match self {
346 Self::HeartbeatMissed {
347 ssh_connection,
348 delegate,
349 forwarder,
350 multiplex_task,
351 heartbeat_task,
352 ..
353 } => Self::Connected {
354 ssh_connection,
355 delegate,
356 forwarder,
357 multiplex_task,
358 heartbeat_task,
359 },
360 _ => self,
361 }
362 }
363
364 fn heartbeat_missed(self) -> Self {
365 match self {
366 Self::Connected {
367 ssh_connection,
368 delegate,
369 forwarder,
370 multiplex_task,
371 heartbeat_task,
372 } => Self::HeartbeatMissed {
373 missed_heartbeats: 1,
374 ssh_connection,
375 delegate,
376 forwarder,
377 multiplex_task,
378 heartbeat_task,
379 },
380 Self::HeartbeatMissed {
381 missed_heartbeats,
382 ssh_connection,
383 delegate,
384 forwarder,
385 multiplex_task,
386 heartbeat_task,
387 } => Self::HeartbeatMissed {
388 missed_heartbeats: missed_heartbeats + 1,
389 ssh_connection,
390 delegate,
391 forwarder,
392 multiplex_task,
393 heartbeat_task,
394 },
395 _ => self,
396 }
397 }
398}
399
400/// The state of the ssh connection.
401#[derive(Clone, Copy, Debug, PartialEq, Eq)]
402pub enum ConnectionState {
403 Connecting,
404 Connected,
405 HeartbeatMissed,
406 Reconnecting,
407 Disconnected,
408}
409
410impl From<&State> for ConnectionState {
411 fn from(value: &State) -> Self {
412 match value {
413 State::Connecting => Self::Connecting,
414 State::Connected { .. } => Self::Connected,
415 State::Reconnecting | State::ReconnectFailed { .. } => Self::Reconnecting,
416 State::HeartbeatMissed { .. } => Self::HeartbeatMissed,
417 State::ReconnectExhausted => Self::Disconnected,
418 State::ServerNotRunning => Self::Disconnected,
419 }
420 }
421}
422
423pub struct SshRemoteClient {
424 client: Arc<ChannelClient>,
425 unique_identifier: String,
426 connection_options: SshConnectionOptions,
427 state: Arc<Mutex<Option<State>>>,
428}
429
430#[derive(Debug)]
431pub enum SshRemoteEvent {
432 Disconnected,
433}
434
435impl EventEmitter<SshRemoteEvent> for SshRemoteClient {}
436
437impl SshRemoteClient {
438 pub fn new(
439 unique_identifier: String,
440 connection_options: SshConnectionOptions,
441 delegate: Arc<dyn SshClientDelegate>,
442 cx: &AppContext,
443 ) -> Task<Result<Model<Self>>> {
444 cx.spawn(|mut cx| async move {
445 let (outgoing_tx, outgoing_rx) = mpsc::unbounded::<Envelope>();
446 let (incoming_tx, incoming_rx) = mpsc::unbounded::<Envelope>();
447 let (connection_activity_tx, connection_activity_rx) = mpsc::channel::<()>(1);
448
449 let client = cx.update(|cx| ChannelClient::new(incoming_rx, outgoing_tx, cx))?;
450 let this = cx.new_model(|_| Self {
451 client: client.clone(),
452 unique_identifier: unique_identifier.clone(),
453 connection_options: connection_options.clone(),
454 state: Arc::new(Mutex::new(Some(State::Connecting))),
455 })?;
456
457 let (proxy, proxy_incoming_tx, proxy_outgoing_rx) =
458 ChannelForwarder::new(incoming_tx, outgoing_rx, &mut cx);
459
460 let (ssh_connection, ssh_proxy_process) = Self::establish_connection(
461 unique_identifier,
462 false,
463 connection_options,
464 delegate.clone(),
465 &mut cx,
466 )
467 .await?;
468
469 let multiplex_task = Self::multiplex(
470 this.downgrade(),
471 ssh_proxy_process,
472 proxy_incoming_tx,
473 proxy_outgoing_rx,
474 connection_activity_tx,
475 &mut cx,
476 );
477
478 if let Err(error) = client.ping(HEARTBEAT_TIMEOUT).await {
479 log::error!("failed to establish connection: {}", error);
480 delegate.set_error(error.to_string(), &mut cx);
481 return Err(error);
482 }
483
484 let heartbeat_task = Self::heartbeat(this.downgrade(), connection_activity_rx, &mut cx);
485
486 this.update(&mut cx, |this, _| {
487 *this.state.lock() = Some(State::Connected {
488 ssh_connection,
489 delegate,
490 forwarder: proxy,
491 multiplex_task,
492 heartbeat_task,
493 });
494 })?;
495
496 Ok(this)
497 })
498 }
499
500 pub fn shutdown_processes<T: RequestMessage>(
501 &self,
502 shutdown_request: Option<T>,
503 ) -> Option<impl Future<Output = ()>> {
504 let state = self.state.lock().take()?;
505 log::info!("shutting down ssh processes");
506
507 let State::Connected {
508 multiplex_task,
509 heartbeat_task,
510 ssh_connection,
511 delegate,
512 forwarder,
513 } = state
514 else {
515 return None;
516 };
517
518 let client = self.client.clone();
519
520 Some(async move {
521 if let Some(shutdown_request) = shutdown_request {
522 client.send(shutdown_request).log_err();
523 // We wait 50ms instead of waiting for a response, because
524 // waiting for a response would require us to wait on the main thread
525 // which we want to avoid in an `on_app_quit` callback.
526 smol::Timer::after(Duration::from_millis(50)).await;
527 }
528
529 // Drop `multiplex_task` because it owns our ssh_proxy_process, which is a
530 // child of master_process.
531 drop(multiplex_task);
532 // Now drop the rest of state, which kills master process.
533 drop(heartbeat_task);
534 drop(ssh_connection);
535 drop(delegate);
536 drop(forwarder);
537 })
538 }
539
540 fn reconnect(&mut self, cx: &mut ModelContext<Self>) -> Result<()> {
541 let mut lock = self.state.lock();
542
543 let can_reconnect = lock
544 .as_ref()
545 .map(|state| state.can_reconnect())
546 .unwrap_or(false);
547 if !can_reconnect {
548 let error = if let Some(state) = lock.as_ref() {
549 format!("invalid state, cannot reconnect while in state {state}")
550 } else {
551 "no state set".to_string()
552 };
553 log::info!("aborting reconnect, because not in state that allows reconnecting");
554 return Err(anyhow!(error));
555 }
556
557 let state = lock.take().unwrap();
558 let (attempts, mut ssh_connection, delegate, forwarder) = match state {
559 State::Connected {
560 ssh_connection,
561 delegate,
562 forwarder,
563 multiplex_task,
564 heartbeat_task,
565 }
566 | State::HeartbeatMissed {
567 ssh_connection,
568 delegate,
569 forwarder,
570 multiplex_task,
571 heartbeat_task,
572 ..
573 } => {
574 drop(multiplex_task);
575 drop(heartbeat_task);
576 (0, ssh_connection, delegate, forwarder)
577 }
578 State::ReconnectFailed {
579 attempts,
580 ssh_connection,
581 delegate,
582 forwarder,
583 ..
584 } => (attempts, ssh_connection, delegate, forwarder),
585 State::Connecting
586 | State::Reconnecting
587 | State::ReconnectExhausted
588 | State::ServerNotRunning => unreachable!(),
589 };
590
591 let attempts = attempts + 1;
592 if attempts > MAX_RECONNECT_ATTEMPTS {
593 log::error!(
594 "Failed to reconnect to after {} attempts, giving up",
595 MAX_RECONNECT_ATTEMPTS
596 );
597 drop(lock);
598 self.set_state(State::ReconnectExhausted, cx);
599 return Ok(());
600 }
601 drop(lock);
602
603 self.set_state(State::Reconnecting, cx);
604
605 log::info!("Trying to reconnect to ssh server... Attempt {}", attempts);
606
607 let identifier = self.unique_identifier.clone();
608 let client = self.client.clone();
609 let reconnect_task = cx.spawn(|this, mut cx| async move {
610 macro_rules! failed {
611 ($error:expr, $attempts:expr, $ssh_connection:expr, $delegate:expr, $forwarder:expr) => {
612 return State::ReconnectFailed {
613 error: anyhow!($error),
614 attempts: $attempts,
615 ssh_connection: $ssh_connection,
616 delegate: $delegate,
617 forwarder: $forwarder,
618 };
619 };
620 }
621
622 if let Err(error) = ssh_connection.master_process.kill() {
623 failed!(error, attempts, ssh_connection, delegate, forwarder);
624 };
625
626 if let Err(error) = ssh_connection
627 .master_process
628 .status()
629 .await
630 .context("Failed to kill ssh process")
631 {
632 failed!(error, attempts, ssh_connection, delegate, forwarder);
633 }
634
635 let connection_options = ssh_connection.socket.connection_options.clone();
636
637 let (incoming_tx, outgoing_rx) = forwarder.into_channels().await;
638 let (forwarder, proxy_incoming_tx, proxy_outgoing_rx) =
639 ChannelForwarder::new(incoming_tx, outgoing_rx, &mut cx);
640 let (connection_activity_tx, connection_activity_rx) = mpsc::channel::<()>(1);
641
642 let (ssh_connection, ssh_process) = match Self::establish_connection(
643 identifier,
644 true,
645 connection_options,
646 delegate.clone(),
647 &mut cx,
648 )
649 .await
650 {
651 Ok((ssh_connection, ssh_process)) => (ssh_connection, ssh_process),
652 Err(error) => {
653 failed!(error, attempts, ssh_connection, delegate, forwarder);
654 }
655 };
656
657 let multiplex_task = Self::multiplex(
658 this.clone(),
659 ssh_process,
660 proxy_incoming_tx,
661 proxy_outgoing_rx,
662 connection_activity_tx,
663 &mut cx,
664 );
665
666 if let Err(error) = client.ping(HEARTBEAT_TIMEOUT).await {
667 failed!(error, attempts, ssh_connection, delegate, forwarder);
668 };
669
670 State::Connected {
671 ssh_connection,
672 delegate,
673 forwarder,
674 multiplex_task,
675 heartbeat_task: Self::heartbeat(this.clone(), connection_activity_rx, &mut cx),
676 }
677 });
678
679 cx.spawn(|this, mut cx| async move {
680 let new_state = reconnect_task.await;
681 this.update(&mut cx, |this, cx| {
682 this.try_set_state(cx, |old_state| {
683 if old_state.is_reconnecting() {
684 match &new_state {
685 State::Connecting
686 | State::Reconnecting { .. }
687 | State::HeartbeatMissed { .. }
688 | State::ServerNotRunning => {}
689 State::Connected { .. } => {
690 log::info!("Successfully reconnected");
691 }
692 State::ReconnectFailed {
693 error, attempts, ..
694 } => {
695 log::error!(
696 "Reconnect attempt {} failed: {:?}. Starting new attempt...",
697 attempts,
698 error
699 );
700 }
701 State::ReconnectExhausted => {
702 log::error!("Reconnect attempt failed and all attempts exhausted");
703 }
704 }
705 Some(new_state)
706 } else {
707 None
708 }
709 });
710
711 if this.state_is(State::is_reconnect_failed) {
712 this.reconnect(cx)
713 } else if this.state_is(State::is_reconnect_exhausted) {
714 cx.emit(SshRemoteEvent::Disconnected);
715 Ok(())
716 } else {
717 log::debug!("State has transition from Reconnecting into new state while attempting reconnect. Ignoring new state.");
718 Ok(())
719 }
720 })
721 })
722 .detach_and_log_err(cx);
723
724 Ok(())
725 }
726
727 fn heartbeat(
728 this: WeakModel<Self>,
729 mut connection_activity_rx: mpsc::Receiver<()>,
730 cx: &mut AsyncAppContext,
731 ) -> Task<Result<()>> {
732 let Ok(client) = this.update(cx, |this, _| this.client.clone()) else {
733 return Task::ready(Err(anyhow!("SshRemoteClient lost")));
734 };
735
736 cx.spawn(|mut cx| {
737 let this = this.clone();
738 async move {
739 let mut missed_heartbeats = 0;
740
741 let keepalive_timer = cx.background_executor().timer(HEARTBEAT_INTERVAL).fuse();
742 futures::pin_mut!(keepalive_timer);
743
744 loop {
745 select_biased! {
746 _ = connection_activity_rx.next().fuse() => {
747 keepalive_timer.set(cx.background_executor().timer(HEARTBEAT_INTERVAL).fuse());
748 }
749 _ = keepalive_timer => {
750 log::debug!("Sending heartbeat to server...");
751
752 let result = select_biased! {
753 _ = connection_activity_rx.next().fuse() => {
754 Ok(())
755 }
756 ping_result = client.ping(HEARTBEAT_TIMEOUT).fuse() => {
757 ping_result
758 }
759 };
760 if result.is_err() {
761 missed_heartbeats += 1;
762 log::warn!(
763 "No heartbeat from server after {:?}. Missed heartbeat {} out of {}.",
764 HEARTBEAT_TIMEOUT,
765 missed_heartbeats,
766 MAX_MISSED_HEARTBEATS
767 );
768 } else if missed_heartbeats != 0 {
769 missed_heartbeats = 0;
770 } else {
771 continue;
772 }
773
774 let result = this.update(&mut cx, |this, mut cx| {
775 this.handle_heartbeat_result(missed_heartbeats, &mut cx)
776 })?;
777 if result.is_break() {
778 return Ok(());
779 }
780 }
781 }
782 }
783 }
784 })
785 }
786
787 fn handle_heartbeat_result(
788 &mut self,
789 missed_heartbeats: usize,
790 cx: &mut ModelContext<Self>,
791 ) -> ControlFlow<()> {
792 let state = self.state.lock().take().unwrap();
793 let next_state = if missed_heartbeats > 0 {
794 state.heartbeat_missed()
795 } else {
796 state.heartbeat_recovered()
797 };
798
799 self.set_state(next_state, cx);
800
801 if missed_heartbeats >= MAX_MISSED_HEARTBEATS {
802 log::error!(
803 "Missed last {} heartbeats. Reconnecting...",
804 missed_heartbeats
805 );
806
807 self.reconnect(cx)
808 .context("failed to start reconnect process after missing heartbeats")
809 .log_err();
810 ControlFlow::Break(())
811 } else {
812 ControlFlow::Continue(())
813 }
814 }
815
816 fn multiplex(
817 this: WeakModel<Self>,
818 mut ssh_proxy_process: Child,
819 incoming_tx: UnboundedSender<Envelope>,
820 mut outgoing_rx: UnboundedReceiver<Envelope>,
821 mut connection_activity_tx: Sender<()>,
822 cx: &AsyncAppContext,
823 ) -> Task<Result<()>> {
824 let mut child_stderr = ssh_proxy_process.stderr.take().unwrap();
825 let mut child_stdout = ssh_proxy_process.stdout.take().unwrap();
826 let mut child_stdin = ssh_proxy_process.stdin.take().unwrap();
827
828 let io_task = cx.background_executor().spawn(async move {
829 let mut stdin_buffer = Vec::new();
830 let mut stdout_buffer = Vec::new();
831 let mut stderr_buffer = Vec::new();
832 let mut stderr_offset = 0;
833
834 loop {
835 stdout_buffer.resize(MESSAGE_LEN_SIZE, 0);
836 stderr_buffer.resize(stderr_offset + 1024, 0);
837
838 select_biased! {
839 outgoing = outgoing_rx.next().fuse() => {
840 let Some(outgoing) = outgoing else {
841 return anyhow::Ok(None);
842 };
843
844 write_message(&mut child_stdin, &mut stdin_buffer, outgoing).await?;
845 }
846
847 result = child_stdout.read(&mut stdout_buffer).fuse() => {
848 match result {
849 Ok(0) => {
850 child_stdin.close().await?;
851 outgoing_rx.close();
852 let status = ssh_proxy_process.status().await?;
853 // If we don't have a code, we assume process
854 // has been killed and treat it as non-zero exit
855 // code
856 return Ok(status.code().or_else(|| Some(1)));
857 }
858 Ok(len) => {
859 if len < stdout_buffer.len() {
860 child_stdout.read_exact(&mut stdout_buffer[len..]).await?;
861 }
862
863 let message_len = message_len_from_buffer(&stdout_buffer);
864 match read_message_with_len(&mut child_stdout, &mut stdout_buffer, message_len).await {
865 Ok(envelope) => {
866 connection_activity_tx.try_send(()).ok();
867 incoming_tx.unbounded_send(envelope).ok();
868 }
869 Err(error) => {
870 log::error!("error decoding message {error:?}");
871 }
872 }
873 }
874 Err(error) => {
875 Err(anyhow!("error reading stdout: {error:?}"))?;
876 }
877 }
878 }
879
880 result = child_stderr.read(&mut stderr_buffer[stderr_offset..]).fuse() => {
881 match result {
882 Ok(len) => {
883 stderr_offset += len;
884 let mut start_ix = 0;
885 while let Some(ix) = stderr_buffer[start_ix..stderr_offset].iter().position(|b| b == &b'\n') {
886 let line_ix = start_ix + ix;
887 let content = &stderr_buffer[start_ix..line_ix];
888 start_ix = line_ix + 1;
889 if let Ok(record) = serde_json::from_slice::<LogRecord>(content) {
890 record.log(log::logger())
891 } else {
892 eprintln!("(remote) {}", String::from_utf8_lossy(content));
893 }
894 }
895 stderr_buffer.drain(0..start_ix);
896 stderr_offset -= start_ix;
897
898 connection_activity_tx.try_send(()).ok();
899 }
900 Err(error) => {
901 Err(anyhow!("error reading stderr: {error:?}"))?;
902 }
903 }
904 }
905 }
906 }
907 });
908
909 cx.spawn(|mut cx| async move {
910 let result = io_task.await;
911
912 match result {
913 Ok(Some(exit_code)) => {
914 if let Some(error) = ProxyLaunchError::from_exit_code(exit_code) {
915 match error {
916 ProxyLaunchError::ServerNotRunning => {
917 log::error!("failed to reconnect because server is not running");
918 this.update(&mut cx, |this, cx| {
919 this.set_state(State::ServerNotRunning, cx);
920 cx.emit(SshRemoteEvent::Disconnected);
921 })?;
922 }
923 }
924 } else if exit_code > 0 {
925 log::error!("proxy process terminated unexpectedly");
926 this.update(&mut cx, |this, cx| {
927 this.reconnect(cx).ok();
928 })?;
929 }
930 }
931 Ok(None) => {}
932 Err(error) => {
933 log::warn!("ssh io task died with error: {:?}. reconnecting...", error);
934 this.update(&mut cx, |this, cx| {
935 this.reconnect(cx).ok();
936 })?;
937 }
938 }
939 Ok(())
940 })
941 }
942
943 fn state_is(&self, check: impl FnOnce(&State) -> bool) -> bool {
944 self.state.lock().as_ref().map_or(false, check)
945 }
946
947 fn try_set_state(
948 &self,
949 cx: &mut ModelContext<Self>,
950 map: impl FnOnce(&State) -> Option<State>,
951 ) {
952 let mut lock = self.state.lock();
953 let new_state = lock.as_ref().and_then(map);
954
955 if let Some(new_state) = new_state {
956 lock.replace(new_state);
957 cx.notify();
958 }
959 }
960
961 fn set_state(&self, state: State, cx: &mut ModelContext<Self>) {
962 log::info!("setting state to '{}'", &state);
963 self.state.lock().replace(state);
964 cx.notify();
965 }
966
967 async fn establish_connection(
968 unique_identifier: String,
969 reconnect: bool,
970 connection_options: SshConnectionOptions,
971 delegate: Arc<dyn SshClientDelegate>,
972 cx: &mut AsyncAppContext,
973 ) -> Result<(SshRemoteConnection, Child)> {
974 let ssh_connection =
975 SshRemoteConnection::new(connection_options, delegate.clone(), cx).await?;
976
977 let platform = ssh_connection.query_platform().await?;
978 let (local_binary_path, version) = delegate.get_server_binary(platform, cx).await??;
979 let remote_binary_path = delegate.remote_server_binary_path(platform, cx)?;
980 ssh_connection
981 .ensure_server_binary(
982 &delegate,
983 &local_binary_path,
984 &remote_binary_path,
985 version,
986 cx,
987 )
988 .await?;
989
990 let socket = ssh_connection.socket.clone();
991 run_cmd(socket.ssh_command(&remote_binary_path).arg("version")).await?;
992
993 delegate.set_status(Some("Starting proxy"), cx);
994
995 let mut start_proxy_command = format!(
996 "RUST_LOG={} RUST_BACKTRACE={} {:?} proxy --identifier {}",
997 std::env::var("RUST_LOG").unwrap_or_default(),
998 std::env::var("RUST_BACKTRACE").unwrap_or_default(),
999 remote_binary_path,
1000 unique_identifier,
1001 );
1002 if reconnect {
1003 start_proxy_command.push_str(" --reconnect");
1004 }
1005
1006 let ssh_proxy_process = socket
1007 .ssh_command(start_proxy_command)
1008 // IMPORTANT: we kill this process when we drop the task that uses it.
1009 .kill_on_drop(true)
1010 .spawn()
1011 .context("failed to spawn remote server")?;
1012
1013 Ok((ssh_connection, ssh_proxy_process))
1014 }
1015
1016 pub fn subscribe_to_entity<E: 'static>(&self, remote_id: u64, entity: &Model<E>) {
1017 self.client.subscribe_to_entity(remote_id, entity);
1018 }
1019
1020 pub fn ssh_args(&self) -> Option<Vec<String>> {
1021 self.state
1022 .lock()
1023 .as_ref()
1024 .and_then(|state| state.ssh_connection())
1025 .map(|ssh_connection| ssh_connection.socket.ssh_args())
1026 }
1027
1028 pub fn proto_client(&self) -> AnyProtoClient {
1029 self.client.clone().into()
1030 }
1031
1032 pub fn connection_string(&self) -> String {
1033 self.connection_options.connection_string()
1034 }
1035
1036 pub fn connection_options(&self) -> SshConnectionOptions {
1037 self.connection_options.clone()
1038 }
1039
1040 #[cfg(not(any(test, feature = "test-support")))]
1041 pub fn connection_state(&self) -> ConnectionState {
1042 self.state
1043 .lock()
1044 .as_ref()
1045 .map(ConnectionState::from)
1046 .unwrap_or(ConnectionState::Disconnected)
1047 }
1048
1049 #[cfg(any(test, feature = "test-support"))]
1050 pub fn connection_state(&self) -> ConnectionState {
1051 ConnectionState::Connected
1052 }
1053
1054 pub fn is_disconnected(&self) -> bool {
1055 self.connection_state() == ConnectionState::Disconnected
1056 }
1057
1058 #[cfg(any(test, feature = "test-support"))]
1059 pub fn fake(
1060 client_cx: &mut gpui::TestAppContext,
1061 server_cx: &mut gpui::TestAppContext,
1062 ) -> (Model<Self>, Arc<ChannelClient>) {
1063 use gpui::Context;
1064
1065 let (server_to_client_tx, server_to_client_rx) = mpsc::unbounded();
1066 let (client_to_server_tx, client_to_server_rx) = mpsc::unbounded();
1067
1068 (
1069 client_cx.update(|cx| {
1070 let client = ChannelClient::new(server_to_client_rx, client_to_server_tx, cx);
1071 cx.new_model(|_| Self {
1072 client,
1073 unique_identifier: "fake".to_string(),
1074 connection_options: SshConnectionOptions::default(),
1075 state: Arc::new(Mutex::new(None)),
1076 })
1077 }),
1078 server_cx.update(|cx| ChannelClient::new(client_to_server_rx, server_to_client_tx, cx)),
1079 )
1080 }
1081}
1082
1083impl From<SshRemoteClient> for AnyProtoClient {
1084 fn from(client: SshRemoteClient) -> Self {
1085 AnyProtoClient::new(client.client.clone())
1086 }
1087}
1088
1089struct SshRemoteConnection {
1090 socket: SshSocket,
1091 master_process: process::Child,
1092 _temp_dir: TempDir,
1093}
1094
1095impl Drop for SshRemoteConnection {
1096 fn drop(&mut self) {
1097 if let Err(error) = self.master_process.kill() {
1098 log::error!("failed to kill SSH master process: {}", error);
1099 }
1100 }
1101}
1102
1103impl SshRemoteConnection {
1104 #[cfg(not(unix))]
1105 async fn new(
1106 _connection_options: SshConnectionOptions,
1107 _delegate: Arc<dyn SshClientDelegate>,
1108 _cx: &mut AsyncAppContext,
1109 ) -> Result<Self> {
1110 Err(anyhow!("ssh is not supported on this platform"))
1111 }
1112
1113 #[cfg(unix)]
1114 async fn new(
1115 connection_options: SshConnectionOptions,
1116 delegate: Arc<dyn SshClientDelegate>,
1117 cx: &mut AsyncAppContext,
1118 ) -> Result<Self> {
1119 use futures::{io::BufReader, AsyncBufReadExt as _};
1120 use smol::{fs::unix::PermissionsExt as _, net::unix::UnixListener};
1121 use util::ResultExt as _;
1122
1123 delegate.set_status(Some("connecting"), cx);
1124
1125 let url = connection_options.ssh_url();
1126 let temp_dir = tempfile::Builder::new()
1127 .prefix("zed-ssh-session")
1128 .tempdir()?;
1129
1130 // Create a domain socket listener to handle requests from the askpass program.
1131 let askpass_socket = temp_dir.path().join("askpass.sock");
1132 let (askpass_opened_tx, askpass_opened_rx) = oneshot::channel::<()>();
1133 let listener =
1134 UnixListener::bind(&askpass_socket).context("failed to create askpass socket")?;
1135
1136 let askpass_task = cx.spawn({
1137 let delegate = delegate.clone();
1138 |mut cx| async move {
1139 let mut askpass_opened_tx = Some(askpass_opened_tx);
1140
1141 while let Ok((mut stream, _)) = listener.accept().await {
1142 if let Some(askpass_opened_tx) = askpass_opened_tx.take() {
1143 askpass_opened_tx.send(()).ok();
1144 }
1145 let mut buffer = Vec::new();
1146 let mut reader = BufReader::new(&mut stream);
1147 if reader.read_until(b'\0', &mut buffer).await.is_err() {
1148 buffer.clear();
1149 }
1150 let password_prompt = String::from_utf8_lossy(&buffer);
1151 if let Some(password) = delegate
1152 .ask_password(password_prompt.to_string(), &mut cx)
1153 .await
1154 .context("failed to get ssh password")
1155 .and_then(|p| p)
1156 .log_err()
1157 {
1158 stream.write_all(password.as_bytes()).await.log_err();
1159 }
1160 }
1161 }
1162 });
1163
1164 // Create an askpass script that communicates back to this process.
1165 let askpass_script = format!(
1166 "{shebang}\n{print_args} | nc -U {askpass_socket} 2> /dev/null \n",
1167 askpass_socket = askpass_socket.display(),
1168 print_args = "printf '%s\\0' \"$@\"",
1169 shebang = "#!/bin/sh",
1170 );
1171 let askpass_script_path = temp_dir.path().join("askpass.sh");
1172 fs::write(&askpass_script_path, askpass_script).await?;
1173 fs::set_permissions(&askpass_script_path, std::fs::Permissions::from_mode(0o755)).await?;
1174
1175 // Start the master SSH process, which does not do anything except for establish
1176 // the connection and keep it open, allowing other ssh commands to reuse it
1177 // via a control socket.
1178 let socket_path = temp_dir.path().join("ssh.sock");
1179 let mut master_process = process::Command::new("ssh")
1180 .stdin(Stdio::null())
1181 .stdout(Stdio::piped())
1182 .stderr(Stdio::piped())
1183 .env("SSH_ASKPASS_REQUIRE", "force")
1184 .env("SSH_ASKPASS", &askpass_script_path)
1185 .args(["-N", "-o", "ControlMaster=yes", "-o"])
1186 .arg(format!("ControlPath={}", socket_path.display()))
1187 .arg(&url)
1188 .spawn()?;
1189
1190 // Wait for this ssh process to close its stdout, indicating that authentication
1191 // has completed.
1192 let stdout = master_process.stdout.as_mut().unwrap();
1193 let mut output = Vec::new();
1194 let connection_timeout = Duration::from_secs(10);
1195
1196 let result = select_biased! {
1197 _ = askpass_opened_rx.fuse() => {
1198 // If the askpass script has opened, that means the user is typing
1199 // their password, in which case we don't want to timeout anymore,
1200 // since we know a connection has been established.
1201 stdout.read_to_end(&mut output).await?;
1202 Ok(())
1203 }
1204 result = stdout.read_to_end(&mut output).fuse() => {
1205 result?;
1206 Ok(())
1207 }
1208 _ = futures::FutureExt::fuse(smol::Timer::after(connection_timeout)) => {
1209 Err(anyhow!("Exceeded {:?} timeout trying to connect to host", connection_timeout))
1210 }
1211 };
1212
1213 if let Err(e) = result {
1214 let error_message = format!("Failed to connect to host: {}.", e);
1215 delegate.set_error(error_message, cx);
1216 return Err(e);
1217 }
1218
1219 drop(askpass_task);
1220
1221 if master_process.try_status()?.is_some() {
1222 output.clear();
1223 let mut stderr = master_process.stderr.take().unwrap();
1224 stderr.read_to_end(&mut output).await?;
1225
1226 let error_message = format!("failed to connect: {}", String::from_utf8_lossy(&output));
1227 delegate.set_error(error_message.clone(), cx);
1228 Err(anyhow!(error_message))?;
1229 }
1230
1231 Ok(Self {
1232 socket: SshSocket {
1233 connection_options,
1234 socket_path,
1235 },
1236 master_process,
1237 _temp_dir: temp_dir,
1238 })
1239 }
1240
1241 async fn ensure_server_binary(
1242 &self,
1243 delegate: &Arc<dyn SshClientDelegate>,
1244 src_path: &Path,
1245 dst_path: &Path,
1246 version: SemanticVersion,
1247 cx: &mut AsyncAppContext,
1248 ) -> Result<()> {
1249 let mut dst_path_gz = dst_path.to_path_buf();
1250 dst_path_gz.set_extension("gz");
1251
1252 if let Some(parent) = dst_path.parent() {
1253 run_cmd(self.socket.ssh_command("mkdir").arg("-p").arg(parent)).await?;
1254 }
1255
1256 let mut server_binary_exists = false;
1257 if cfg!(not(debug_assertions)) {
1258 if let Ok(installed_version) =
1259 run_cmd(self.socket.ssh_command(dst_path).arg("version")).await
1260 {
1261 if installed_version.trim() == version.to_string() {
1262 server_binary_exists = true;
1263 }
1264 }
1265 }
1266
1267 if server_binary_exists {
1268 log::info!("remote development server already present",);
1269 return Ok(());
1270 }
1271
1272 let src_stat = fs::metadata(src_path).await?;
1273 let size = src_stat.len();
1274 let server_mode = 0o755;
1275
1276 let t0 = Instant::now();
1277 delegate.set_status(Some("uploading remote development server"), cx);
1278 log::info!("uploading remote development server ({}kb)", size / 1024);
1279 self.upload_file(src_path, &dst_path_gz)
1280 .await
1281 .context("failed to upload server binary")?;
1282 log::info!("uploaded remote development server in {:?}", t0.elapsed());
1283
1284 delegate.set_status(Some("extracting remote development server"), cx);
1285 run_cmd(
1286 self.socket
1287 .ssh_command("gunzip")
1288 .arg("--force")
1289 .arg(&dst_path_gz),
1290 )
1291 .await?;
1292
1293 delegate.set_status(Some("unzipping remote development server"), cx);
1294 run_cmd(
1295 self.socket
1296 .ssh_command("chmod")
1297 .arg(format!("{:o}", server_mode))
1298 .arg(dst_path),
1299 )
1300 .await?;
1301
1302 Ok(())
1303 }
1304
1305 async fn query_platform(&self) -> Result<SshPlatform> {
1306 let os = run_cmd(self.socket.ssh_command("uname").arg("-s")).await?;
1307 let arch = run_cmd(self.socket.ssh_command("uname").arg("-m")).await?;
1308
1309 let os = match os.trim() {
1310 "Darwin" => "macos",
1311 "Linux" => "linux",
1312 _ => Err(anyhow!("unknown uname os {os:?}"))?,
1313 };
1314 let arch = if arch.starts_with("arm") || arch.starts_with("aarch64") {
1315 "aarch64"
1316 } else if arch.starts_with("x86") || arch.starts_with("i686") {
1317 "x86_64"
1318 } else {
1319 Err(anyhow!("unknown uname architecture {arch:?}"))?
1320 };
1321
1322 Ok(SshPlatform { os, arch })
1323 }
1324
1325 async fn upload_file(&self, src_path: &Path, dest_path: &Path) -> Result<()> {
1326 let mut command = process::Command::new("scp");
1327 let output = self
1328 .socket
1329 .ssh_options(&mut command)
1330 .args(
1331 self.socket
1332 .connection_options
1333 .port
1334 .map(|port| vec!["-P".to_string(), port.to_string()])
1335 .unwrap_or_default(),
1336 )
1337 .arg(src_path)
1338 .arg(format!(
1339 "{}:{}",
1340 self.socket.connection_options.scp_url(),
1341 dest_path.display()
1342 ))
1343 .output()
1344 .await?;
1345
1346 if output.status.success() {
1347 Ok(())
1348 } else {
1349 Err(anyhow!(
1350 "failed to upload file {} -> {}: {}",
1351 src_path.display(),
1352 dest_path.display(),
1353 String::from_utf8_lossy(&output.stderr)
1354 ))
1355 }
1356 }
1357}
1358
1359type ResponseChannels = Mutex<HashMap<MessageId, oneshot::Sender<(Envelope, oneshot::Sender<()>)>>>;
1360
1361pub struct ChannelClient {
1362 next_message_id: AtomicU32,
1363 outgoing_tx: mpsc::UnboundedSender<Envelope>,
1364 response_channels: ResponseChannels, // Lock
1365 message_handlers: Mutex<ProtoMessageHandlerSet>, // Lock
1366}
1367
1368impl ChannelClient {
1369 pub fn new(
1370 incoming_rx: mpsc::UnboundedReceiver<Envelope>,
1371 outgoing_tx: mpsc::UnboundedSender<Envelope>,
1372 cx: &AppContext,
1373 ) -> Arc<Self> {
1374 let this = Arc::new(Self {
1375 outgoing_tx,
1376 next_message_id: AtomicU32::new(0),
1377 response_channels: ResponseChannels::default(),
1378 message_handlers: Default::default(),
1379 });
1380
1381 Self::start_handling_messages(this.clone(), incoming_rx, cx);
1382
1383 this
1384 }
1385
1386 fn start_handling_messages(
1387 this: Arc<Self>,
1388 mut incoming_rx: mpsc::UnboundedReceiver<Envelope>,
1389 cx: &AppContext,
1390 ) {
1391 cx.spawn(|cx| {
1392 let this = Arc::downgrade(&this);
1393 async move {
1394 let peer_id = PeerId { owner_id: 0, id: 0 };
1395 while let Some(incoming) = incoming_rx.next().await {
1396 let Some(this) = this.upgrade() else {
1397 return anyhow::Ok(());
1398 };
1399
1400 if let Some(request_id) = incoming.responding_to {
1401 let request_id = MessageId(request_id);
1402 let sender = this.response_channels.lock().remove(&request_id);
1403 if let Some(sender) = sender {
1404 let (tx, rx) = oneshot::channel();
1405 if incoming.payload.is_some() {
1406 sender.send((incoming, tx)).ok();
1407 }
1408 rx.await.ok();
1409 }
1410 } else if let Some(envelope) =
1411 build_typed_envelope(peer_id, Instant::now(), incoming)
1412 {
1413 let type_name = envelope.payload_type_name();
1414 if let Some(future) = ProtoMessageHandlerSet::handle_message(
1415 &this.message_handlers,
1416 envelope,
1417 this.clone().into(),
1418 cx.clone(),
1419 ) {
1420 log::debug!("ssh message received. name:{type_name}");
1421 cx.foreground_executor().spawn(async move {
1422 match future.await {
1423 Ok(_) => {
1424 log::debug!("ssh message handled. name:{type_name}");
1425 }
1426 Err(error) => {
1427 log::error!(
1428 "error handling message. type:{type_name}, error:{error}",
1429 );
1430 }
1431 }
1432 }).detach();
1433
1434 } else {
1435 log::error!("unhandled ssh message name:{type_name}");
1436 }
1437 }
1438 }
1439 anyhow::Ok(())
1440 }
1441 })
1442 .detach();
1443 }
1444
1445 pub fn subscribe_to_entity<E: 'static>(&self, remote_id: u64, entity: &Model<E>) {
1446 let id = (TypeId::of::<E>(), remote_id);
1447
1448 let mut message_handlers = self.message_handlers.lock();
1449 if message_handlers
1450 .entities_by_type_and_remote_id
1451 .contains_key(&id)
1452 {
1453 panic!("already subscribed to entity");
1454 }
1455
1456 message_handlers.entities_by_type_and_remote_id.insert(
1457 id,
1458 EntityMessageSubscriber::Entity {
1459 handle: entity.downgrade().into(),
1460 },
1461 );
1462 }
1463
1464 pub fn request<T: RequestMessage>(
1465 &self,
1466 payload: T,
1467 ) -> impl 'static + Future<Output = Result<T::Response>> {
1468 log::debug!("ssh request start. name:{}", T::NAME);
1469 let response = self.request_dynamic(payload.into_envelope(0, None, None), T::NAME);
1470 async move {
1471 let response = response.await?;
1472 log::debug!("ssh request finish. name:{}", T::NAME);
1473 T::Response::from_envelope(response)
1474 .ok_or_else(|| anyhow!("received a response of the wrong type"))
1475 }
1476 }
1477
1478 pub async fn ping(&self, timeout: Duration) -> Result<()> {
1479 smol::future::or(
1480 async {
1481 self.request(proto::Ping {}).await?;
1482 Ok(())
1483 },
1484 async {
1485 smol::Timer::after(timeout).await;
1486 Err(anyhow!("Timeout detected"))
1487 },
1488 )
1489 .await
1490 }
1491
1492 pub fn send<T: EnvelopedMessage>(&self, payload: T) -> Result<()> {
1493 log::debug!("ssh send name:{}", T::NAME);
1494 self.send_dynamic(payload.into_envelope(0, None, None))
1495 }
1496
1497 pub fn request_dynamic(
1498 &self,
1499 mut envelope: proto::Envelope,
1500 type_name: &'static str,
1501 ) -> impl 'static + Future<Output = Result<proto::Envelope>> {
1502 envelope.id = self.next_message_id.fetch_add(1, SeqCst);
1503 let (tx, rx) = oneshot::channel();
1504 let mut response_channels_lock = self.response_channels.lock();
1505 response_channels_lock.insert(MessageId(envelope.id), tx);
1506 drop(response_channels_lock);
1507 let result = self.outgoing_tx.unbounded_send(envelope);
1508 async move {
1509 if let Err(error) = &result {
1510 log::error!("failed to send message: {}", error);
1511 return Err(anyhow!("failed to send message: {}", error));
1512 }
1513
1514 let response = rx.await.context("connection lost")?.0;
1515 if let Some(proto::envelope::Payload::Error(error)) = &response.payload {
1516 return Err(RpcError::from_proto(error, type_name));
1517 }
1518 Ok(response)
1519 }
1520 }
1521
1522 pub fn send_dynamic(&self, mut envelope: proto::Envelope) -> Result<()> {
1523 envelope.id = self.next_message_id.fetch_add(1, SeqCst);
1524 self.outgoing_tx.unbounded_send(envelope)?;
1525 Ok(())
1526 }
1527}
1528
1529impl ProtoClient for ChannelClient {
1530 fn request(
1531 &self,
1532 envelope: proto::Envelope,
1533 request_type: &'static str,
1534 ) -> BoxFuture<'static, Result<proto::Envelope>> {
1535 self.request_dynamic(envelope, request_type).boxed()
1536 }
1537
1538 fn send(&self, envelope: proto::Envelope, _message_type: &'static str) -> Result<()> {
1539 self.send_dynamic(envelope)
1540 }
1541
1542 fn send_response(&self, envelope: Envelope, _message_type: &'static str) -> anyhow::Result<()> {
1543 self.send_dynamic(envelope)
1544 }
1545
1546 fn message_handler_set(&self) -> &Mutex<ProtoMessageHandlerSet> {
1547 &self.message_handlers
1548 }
1549
1550 fn is_via_collab(&self) -> bool {
1551 false
1552 }
1553}