1use crate::{
2 SshConnectionOptions,
3 protocol::MessageId,
4 proxy::ProxyLaunchError,
5 transport::{
6 ssh::SshRemoteConnection,
7 wsl::{WslConnectionOptions, WslRemoteConnection},
8 },
9};
10use anyhow::{Context as _, Result, anyhow};
11use askpass::EncryptedPassword;
12use async_trait::async_trait;
13use collections::HashMap;
14use futures::{
15 Future, FutureExt as _, StreamExt as _,
16 channel::{
17 mpsc::{self, Sender, UnboundedReceiver, UnboundedSender},
18 oneshot,
19 },
20 future::{BoxFuture, Shared},
21 select, select_biased,
22};
23use gpui::{
24 App, AppContext as _, AsyncApp, BackgroundExecutor, BorrowAppContext, Context, Entity,
25 EventEmitter, FutureExt, Global, SemanticVersion, Task, WeakEntity,
26};
27use parking_lot::Mutex;
28
29use release_channel::ReleaseChannel;
30use rpc::{
31 AnyProtoClient, ErrorExt, ProtoClient, ProtoMessageHandlerSet, RpcError,
32 proto::{self, Envelope, EnvelopedMessage, PeerId, RequestMessage, build_typed_envelope},
33};
34use std::{
35 collections::VecDeque,
36 fmt,
37 ops::ControlFlow,
38 path::PathBuf,
39 sync::{
40 Arc, Weak,
41 atomic::{AtomicU32, AtomicU64, Ordering::SeqCst},
42 },
43 time::{Duration, Instant},
44};
45use util::{
46 ResultExt,
47 paths::{PathStyle, RemotePathBuf},
48};
49
50#[derive(Copy, Clone, Debug)]
51pub struct RemotePlatform {
52 pub os: &'static str,
53 pub arch: &'static str,
54}
55
56#[derive(Clone, Debug)]
57pub struct CommandTemplate {
58 pub program: String,
59 pub args: Vec<String>,
60 pub env: HashMap<String, String>,
61}
62
63pub trait RemoteClientDelegate: Send + Sync {
64 fn ask_password(
65 &self,
66 prompt: String,
67 tx: oneshot::Sender<EncryptedPassword>,
68 cx: &mut AsyncApp,
69 );
70 fn get_download_params(
71 &self,
72 platform: RemotePlatform,
73 release_channel: ReleaseChannel,
74 version: Option<SemanticVersion>,
75 cx: &mut AsyncApp,
76 ) -> Task<Result<Option<(String, String)>>>;
77 fn download_server_binary_locally(
78 &self,
79 platform: RemotePlatform,
80 release_channel: ReleaseChannel,
81 version: Option<SemanticVersion>,
82 cx: &mut AsyncApp,
83 ) -> Task<Result<PathBuf>>;
84 fn set_status(&self, status: Option<&str>, cx: &mut AsyncApp);
85}
86
87const MAX_MISSED_HEARTBEATS: usize = 5;
88const HEARTBEAT_INTERVAL: Duration = Duration::from_secs(5);
89const HEARTBEAT_TIMEOUT: Duration = Duration::from_secs(5);
90
91const MAX_RECONNECT_ATTEMPTS: usize = 3;
92
93enum State {
94 Connecting,
95 Connected {
96 ssh_connection: Arc<dyn RemoteConnection>,
97 delegate: Arc<dyn RemoteClientDelegate>,
98
99 multiplex_task: Task<Result<()>>,
100 heartbeat_task: Task<Result<()>>,
101 },
102 HeartbeatMissed {
103 missed_heartbeats: usize,
104
105 ssh_connection: Arc<dyn RemoteConnection>,
106 delegate: Arc<dyn RemoteClientDelegate>,
107
108 multiplex_task: Task<Result<()>>,
109 heartbeat_task: Task<Result<()>>,
110 },
111 Reconnecting,
112 ReconnectFailed {
113 ssh_connection: Arc<dyn RemoteConnection>,
114 delegate: Arc<dyn RemoteClientDelegate>,
115
116 error: anyhow::Error,
117 attempts: usize,
118 },
119 ReconnectExhausted,
120 ServerNotRunning,
121}
122
123impl fmt::Display for State {
124 fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
125 match self {
126 Self::Connecting => write!(f, "connecting"),
127 Self::Connected { .. } => write!(f, "connected"),
128 Self::Reconnecting => write!(f, "reconnecting"),
129 Self::ReconnectFailed { .. } => write!(f, "reconnect failed"),
130 Self::ReconnectExhausted => write!(f, "reconnect exhausted"),
131 Self::HeartbeatMissed { .. } => write!(f, "heartbeat missed"),
132 Self::ServerNotRunning { .. } => write!(f, "server not running"),
133 }
134 }
135}
136
137impl State {
138 fn remote_connection(&self) -> Option<Arc<dyn RemoteConnection>> {
139 match self {
140 Self::Connected { ssh_connection, .. } => Some(ssh_connection.clone()),
141 Self::HeartbeatMissed { ssh_connection, .. } => Some(ssh_connection.clone()),
142 Self::ReconnectFailed { ssh_connection, .. } => Some(ssh_connection.clone()),
143 _ => None,
144 }
145 }
146
147 fn can_reconnect(&self) -> bool {
148 match self {
149 Self::Connected { .. }
150 | Self::HeartbeatMissed { .. }
151 | Self::ReconnectFailed { .. } => true,
152 State::Connecting
153 | State::Reconnecting
154 | State::ReconnectExhausted
155 | State::ServerNotRunning => false,
156 }
157 }
158
159 fn is_reconnect_failed(&self) -> bool {
160 matches!(self, Self::ReconnectFailed { .. })
161 }
162
163 fn is_reconnect_exhausted(&self) -> bool {
164 matches!(self, Self::ReconnectExhausted { .. })
165 }
166
167 fn is_server_not_running(&self) -> bool {
168 matches!(self, Self::ServerNotRunning)
169 }
170
171 fn is_reconnecting(&self) -> bool {
172 matches!(self, Self::Reconnecting { .. })
173 }
174
175 fn heartbeat_recovered(self) -> Self {
176 match self {
177 Self::HeartbeatMissed {
178 ssh_connection,
179 delegate,
180 multiplex_task,
181 heartbeat_task,
182 ..
183 } => Self::Connected {
184 ssh_connection,
185 delegate,
186 multiplex_task,
187 heartbeat_task,
188 },
189 _ => self,
190 }
191 }
192
193 fn heartbeat_missed(self) -> Self {
194 match self {
195 Self::Connected {
196 ssh_connection,
197 delegate,
198 multiplex_task,
199 heartbeat_task,
200 } => Self::HeartbeatMissed {
201 missed_heartbeats: 1,
202 ssh_connection,
203 delegate,
204 multiplex_task,
205 heartbeat_task,
206 },
207 Self::HeartbeatMissed {
208 missed_heartbeats,
209 ssh_connection,
210 delegate,
211 multiplex_task,
212 heartbeat_task,
213 } => Self::HeartbeatMissed {
214 missed_heartbeats: missed_heartbeats + 1,
215 ssh_connection,
216 delegate,
217 multiplex_task,
218 heartbeat_task,
219 },
220 _ => self,
221 }
222 }
223}
224
225/// The state of the ssh connection.
226#[derive(Clone, Copy, Debug, PartialEq, Eq)]
227pub enum ConnectionState {
228 Connecting,
229 Connected,
230 HeartbeatMissed,
231 Reconnecting,
232 Disconnected,
233}
234
235impl From<&State> for ConnectionState {
236 fn from(value: &State) -> Self {
237 match value {
238 State::Connecting => Self::Connecting,
239 State::Connected { .. } => Self::Connected,
240 State::Reconnecting | State::ReconnectFailed { .. } => Self::Reconnecting,
241 State::HeartbeatMissed { .. } => Self::HeartbeatMissed,
242 State::ReconnectExhausted => Self::Disconnected,
243 State::ServerNotRunning => Self::Disconnected,
244 }
245 }
246}
247
248pub struct RemoteClient {
249 client: Arc<ChannelClient>,
250 unique_identifier: String,
251 connection_options: RemoteConnectionOptions,
252 path_style: PathStyle,
253 state: Option<State>,
254}
255
256#[derive(Debug)]
257pub enum RemoteClientEvent {
258 Disconnected,
259}
260
261impl EventEmitter<RemoteClientEvent> for RemoteClient {}
262
263// Identifies the socket on the remote server so that reconnects
264// can re-join the same project.
265pub enum ConnectionIdentifier {
266 Setup(u64),
267 Workspace(i64),
268}
269
270static NEXT_ID: AtomicU64 = AtomicU64::new(1);
271
272impl ConnectionIdentifier {
273 pub fn setup() -> Self {
274 Self::Setup(NEXT_ID.fetch_add(1, SeqCst))
275 }
276
277 // This string gets used in a socket name, and so must be relatively short.
278 // The total length of:
279 // /home/{username}/.local/share/zed/server_state/{name}/stdout.sock
280 // Must be less than about 100 characters
281 // https://unix.stackexchange.com/questions/367008/why-is-socket-path-length-limited-to-a-hundred-chars
282 // So our strings should be at most 20 characters or so.
283 fn to_string(&self, cx: &App) -> String {
284 let identifier_prefix = match ReleaseChannel::global(cx) {
285 ReleaseChannel::Stable => "".to_string(),
286 release_channel => format!("{}-", release_channel.dev_name()),
287 };
288 match self {
289 Self::Setup(setup_id) => format!("{identifier_prefix}setup-{setup_id}"),
290 Self::Workspace(workspace_id) => {
291 format!("{identifier_prefix}workspace-{workspace_id}",)
292 }
293 }
294 }
295}
296
297impl RemoteClient {
298 pub fn ssh(
299 unique_identifier: ConnectionIdentifier,
300 connection_options: SshConnectionOptions,
301 cancellation: oneshot::Receiver<()>,
302 delegate: Arc<dyn RemoteClientDelegate>,
303 cx: &mut App,
304 ) -> Task<Result<Option<Entity<Self>>>> {
305 Self::new(
306 unique_identifier,
307 RemoteConnectionOptions::Ssh(connection_options),
308 cancellation,
309 delegate,
310 cx,
311 )
312 }
313
314 pub fn new(
315 unique_identifier: ConnectionIdentifier,
316 connection_options: RemoteConnectionOptions,
317 cancellation: oneshot::Receiver<()>,
318 delegate: Arc<dyn RemoteClientDelegate>,
319 cx: &mut App,
320 ) -> Task<Result<Option<Entity<Self>>>> {
321 let unique_identifier = unique_identifier.to_string(cx);
322 cx.spawn(async move |cx| {
323 let success = Box::pin(async move {
324 let (outgoing_tx, outgoing_rx) = mpsc::unbounded::<Envelope>();
325 let (incoming_tx, incoming_rx) = mpsc::unbounded::<Envelope>();
326 let (connection_activity_tx, connection_activity_rx) = mpsc::channel::<()>(1);
327
328 let client =
329 cx.update(|cx| ChannelClient::new(incoming_rx, outgoing_tx, cx, "client"))?;
330
331 let ssh_connection = cx
332 .update(|cx| {
333 cx.update_default_global(|pool: &mut ConnectionPool, cx| {
334 pool.connect(connection_options.clone(), &delegate, cx)
335 })
336 })?
337 .await
338 .map_err(|e| e.cloned())?;
339
340 let path_style = ssh_connection.path_style();
341 let this = cx.new(|_| Self {
342 client: client.clone(),
343 unique_identifier: unique_identifier.clone(),
344 connection_options,
345 path_style,
346 state: Some(State::Connecting),
347 })?;
348
349 let io_task = ssh_connection.start_proxy(
350 unique_identifier,
351 false,
352 incoming_tx,
353 outgoing_rx,
354 connection_activity_tx,
355 delegate.clone(),
356 cx,
357 );
358
359 let ready = client
360 .wait_for_remote_started()
361 .with_timeout(HEARTBEAT_TIMEOUT, cx.background_executor())
362 .await;
363 match ready {
364 Ok(Some(_)) => {}
365 Ok(None) => {
366 let mut error = "remote client exited before becoming ready".to_owned();
367 if let Some(status) = io_task.now_or_never() {
368 match status {
369 Ok(exit_code) => {
370 error.push_str(&format!(", exit_code={exit_code:?}"))
371 }
372 Err(e) => error.push_str(&format!(", error={e:?}")),
373 }
374 }
375 let error = anyhow::anyhow!("{error}");
376 log::error!("failed to establish connection: {}", error);
377 return Err(error);
378 }
379 Err(_) => {
380 let mut error =
381 "remote client did not become ready within the timeout".to_owned();
382 if let Some(status) = io_task.now_or_never() {
383 match status {
384 Ok(exit_code) => {
385 error.push_str(&format!(", exit_code={exit_code:?}"))
386 }
387 Err(e) => error.push_str(&format!(", error={e:?}")),
388 }
389 }
390 let error = anyhow::anyhow!("{error}");
391 log::error!("failed to establish connection: {}", error);
392 return Err(error);
393 }
394 }
395 let multiplex_task = Self::monitor(this.downgrade(), io_task, cx);
396 if let Err(error) = client.ping(HEARTBEAT_TIMEOUT).await {
397 log::error!("failed to establish connection: {}", error);
398 return Err(error);
399 }
400
401 let heartbeat_task = Self::heartbeat(this.downgrade(), connection_activity_rx, cx);
402
403 this.update(cx, |this, _| {
404 this.state = Some(State::Connected {
405 ssh_connection,
406 delegate,
407 multiplex_task,
408 heartbeat_task,
409 });
410 })?;
411
412 Ok(Some(this))
413 });
414
415 select! {
416 _ = cancellation.fuse() => {
417 Ok(None)
418 }
419 result = success.fuse() => result
420 }
421 })
422 }
423
424 pub fn proto_client_from_channels(
425 incoming_rx: mpsc::UnboundedReceiver<Envelope>,
426 outgoing_tx: mpsc::UnboundedSender<Envelope>,
427 cx: &App,
428 name: &'static str,
429 ) -> AnyProtoClient {
430 ChannelClient::new(incoming_rx, outgoing_tx, cx, name).into()
431 }
432
433 pub fn shutdown_processes<T: RequestMessage>(
434 &mut self,
435 shutdown_request: Option<T>,
436 executor: BackgroundExecutor,
437 ) -> Option<impl Future<Output = ()> + use<T>> {
438 let state = self.state.take()?;
439 log::info!("shutting down ssh processes");
440
441 let State::Connected {
442 multiplex_task,
443 heartbeat_task,
444 ssh_connection,
445 delegate,
446 } = state
447 else {
448 return None;
449 };
450
451 let client = self.client.clone();
452
453 Some(async move {
454 if let Some(shutdown_request) = shutdown_request {
455 client.send(shutdown_request).log_err();
456 // We wait 50ms instead of waiting for a response, because
457 // waiting for a response would require us to wait on the main thread
458 // which we want to avoid in an `on_app_quit` callback.
459 executor.timer(Duration::from_millis(50)).await;
460 }
461
462 // Drop `multiplex_task` because it owns our ssh_proxy_process, which is a
463 // child of master_process.
464 drop(multiplex_task);
465 // Now drop the rest of state, which kills master process.
466 drop(heartbeat_task);
467 drop(ssh_connection);
468 drop(delegate);
469 })
470 }
471
472 fn reconnect(&mut self, cx: &mut Context<Self>) -> Result<()> {
473 let can_reconnect = self
474 .state
475 .as_ref()
476 .map(|state| state.can_reconnect())
477 .unwrap_or(false);
478 if !can_reconnect {
479 log::info!("aborting reconnect, because not in state that allows reconnecting");
480 let error = if let Some(state) = self.state.as_ref() {
481 format!("invalid state, cannot reconnect while in state {state}")
482 } else {
483 "no state set".to_string()
484 };
485 anyhow::bail!(error);
486 }
487
488 let state = self.state.take().unwrap();
489 let (attempts, remote_connection, delegate) = match state {
490 State::Connected {
491 ssh_connection,
492 delegate,
493 multiplex_task,
494 heartbeat_task,
495 }
496 | State::HeartbeatMissed {
497 ssh_connection,
498 delegate,
499 multiplex_task,
500 heartbeat_task,
501 ..
502 } => {
503 drop(multiplex_task);
504 drop(heartbeat_task);
505 (0, ssh_connection, delegate)
506 }
507 State::ReconnectFailed {
508 attempts,
509 ssh_connection,
510 delegate,
511 ..
512 } => (attempts, ssh_connection, delegate),
513 State::Connecting
514 | State::Reconnecting
515 | State::ReconnectExhausted
516 | State::ServerNotRunning => unreachable!(),
517 };
518
519 let attempts = attempts + 1;
520 if attempts > MAX_RECONNECT_ATTEMPTS {
521 log::error!(
522 "Failed to reconnect to after {} attempts, giving up",
523 MAX_RECONNECT_ATTEMPTS
524 );
525 self.set_state(State::ReconnectExhausted, cx);
526 return Ok(());
527 }
528
529 self.set_state(State::Reconnecting, cx);
530
531 log::info!("Trying to reconnect to ssh server... Attempt {}", attempts);
532
533 let unique_identifier = self.unique_identifier.clone();
534 let client = self.client.clone();
535 let reconnect_task = cx.spawn(async move |this, cx| {
536 macro_rules! failed {
537 ($error:expr, $attempts:expr, $ssh_connection:expr, $delegate:expr) => {
538 return State::ReconnectFailed {
539 error: anyhow!($error),
540 attempts: $attempts,
541 ssh_connection: $ssh_connection,
542 delegate: $delegate,
543 };
544 };
545 }
546
547 if let Err(error) = remote_connection
548 .kill()
549 .await
550 .context("Failed to kill ssh process")
551 {
552 failed!(error, attempts, remote_connection, delegate);
553 };
554
555 let connection_options = remote_connection.connection_options();
556
557 let (outgoing_tx, outgoing_rx) = mpsc::unbounded::<Envelope>();
558 let (incoming_tx, incoming_rx) = mpsc::unbounded::<Envelope>();
559 let (connection_activity_tx, connection_activity_rx) = mpsc::channel::<()>(1);
560
561 let (ssh_connection, io_task) = match async {
562 let ssh_connection = cx
563 .update_global(|pool: &mut ConnectionPool, cx| {
564 pool.connect(connection_options, &delegate, cx)
565 })?
566 .await
567 .map_err(|error| error.cloned())?;
568
569 let io_task = ssh_connection.start_proxy(
570 unique_identifier,
571 true,
572 incoming_tx,
573 outgoing_rx,
574 connection_activity_tx,
575 delegate.clone(),
576 cx,
577 );
578 anyhow::Ok((ssh_connection, io_task))
579 }
580 .await
581 {
582 Ok((ssh_connection, io_task)) => (ssh_connection, io_task),
583 Err(error) => {
584 failed!(error, attempts, remote_connection, delegate);
585 }
586 };
587
588 let multiplex_task = Self::monitor(this.clone(), io_task, cx);
589 client.reconnect(incoming_rx, outgoing_tx, cx);
590
591 if let Err(error) = client.resync(HEARTBEAT_TIMEOUT).await {
592 failed!(error, attempts, ssh_connection, delegate);
593 };
594
595 State::Connected {
596 ssh_connection,
597 delegate,
598 multiplex_task,
599 heartbeat_task: Self::heartbeat(this.clone(), connection_activity_rx, cx),
600 }
601 });
602
603 cx.spawn(async move |this, cx| {
604 let new_state = reconnect_task.await;
605 this.update(cx, |this, cx| {
606 this.try_set_state(cx, |old_state| {
607 if old_state.is_reconnecting() {
608 match &new_state {
609 State::Connecting
610 | State::Reconnecting
611 | State::HeartbeatMissed { .. }
612 | State::ServerNotRunning => {}
613 State::Connected { .. } => {
614 log::info!("Successfully reconnected");
615 }
616 State::ReconnectFailed {
617 error, attempts, ..
618 } => {
619 log::error!(
620 "Reconnect attempt {} failed: {:?}. Starting new attempt...",
621 attempts,
622 error
623 );
624 }
625 State::ReconnectExhausted => {
626 log::error!("Reconnect attempt failed and all attempts exhausted");
627 }
628 }
629 Some(new_state)
630 } else {
631 None
632 }
633 });
634
635 if this.state_is(State::is_reconnect_failed) {
636 this.reconnect(cx)
637 } else if this.state_is(State::is_reconnect_exhausted) {
638 Ok(())
639 } else {
640 log::debug!("State has transition from Reconnecting into new state while attempting reconnect.");
641 Ok(())
642 }
643 })
644 })
645 .detach_and_log_err(cx);
646
647 Ok(())
648 }
649
650 fn heartbeat(
651 this: WeakEntity<Self>,
652 mut connection_activity_rx: mpsc::Receiver<()>,
653 cx: &mut AsyncApp,
654 ) -> Task<Result<()>> {
655 let Ok(client) = this.read_with(cx, |this, _| this.client.clone()) else {
656 return Task::ready(Err(anyhow!("SshRemoteClient lost")));
657 };
658
659 cx.spawn(async move |cx| {
660 let mut missed_heartbeats = 0;
661
662 let keepalive_timer = cx.background_executor().timer(HEARTBEAT_INTERVAL).fuse();
663 futures::pin_mut!(keepalive_timer);
664
665 loop {
666 select_biased! {
667 result = connection_activity_rx.next().fuse() => {
668 if result.is_none() {
669 log::warn!("ssh heartbeat: connection activity channel has been dropped. stopping.");
670 return Ok(());
671 }
672
673 if missed_heartbeats != 0 {
674 missed_heartbeats = 0;
675 let _ =this.update(cx, |this, cx| {
676 this.handle_heartbeat_result(missed_heartbeats, cx)
677 })?;
678 }
679 }
680 _ = keepalive_timer => {
681 log::debug!("Sending heartbeat to server...");
682
683 let result = select_biased! {
684 _ = connection_activity_rx.next().fuse() => {
685 Ok(())
686 }
687 ping_result = client.ping(HEARTBEAT_TIMEOUT).fuse() => {
688 ping_result
689 }
690 };
691
692 if result.is_err() {
693 missed_heartbeats += 1;
694 log::warn!(
695 "No heartbeat from server after {:?}. Missed heartbeat {} out of {}.",
696 HEARTBEAT_TIMEOUT,
697 missed_heartbeats,
698 MAX_MISSED_HEARTBEATS
699 );
700 } else if missed_heartbeats != 0 {
701 missed_heartbeats = 0;
702 } else {
703 continue;
704 }
705
706 let result = this.update(cx, |this, cx| {
707 this.handle_heartbeat_result(missed_heartbeats, cx)
708 })?;
709 if result.is_break() {
710 return Ok(());
711 }
712 }
713 }
714
715 keepalive_timer.set(cx.background_executor().timer(HEARTBEAT_INTERVAL).fuse());
716 }
717 })
718 }
719
720 fn handle_heartbeat_result(
721 &mut self,
722 missed_heartbeats: usize,
723 cx: &mut Context<Self>,
724 ) -> ControlFlow<()> {
725 let state = self.state.take().unwrap();
726 let next_state = if missed_heartbeats > 0 {
727 state.heartbeat_missed()
728 } else {
729 state.heartbeat_recovered()
730 };
731
732 self.set_state(next_state, cx);
733
734 if missed_heartbeats >= MAX_MISSED_HEARTBEATS {
735 log::error!(
736 "Missed last {} heartbeats. Reconnecting...",
737 missed_heartbeats
738 );
739
740 self.reconnect(cx)
741 .context("failed to start reconnect process after missing heartbeats")
742 .log_err();
743 ControlFlow::Break(())
744 } else {
745 ControlFlow::Continue(())
746 }
747 }
748
749 fn monitor(
750 this: WeakEntity<Self>,
751 io_task: Task<Result<i32>>,
752 cx: &AsyncApp,
753 ) -> Task<Result<()>> {
754 cx.spawn(async move |cx| {
755 let result = io_task.await;
756
757 match result {
758 Ok(exit_code) => {
759 if let Some(error) = ProxyLaunchError::from_exit_code(exit_code) {
760 match error {
761 ProxyLaunchError::ServerNotRunning => {
762 log::error!("failed to reconnect because server is not running");
763 this.update(cx, |this, cx| {
764 this.set_state(State::ServerNotRunning, cx);
765 })?;
766 }
767 }
768 } else if exit_code > 0 {
769 log::error!("proxy process terminated unexpectedly");
770 this.update(cx, |this, cx| {
771 this.reconnect(cx).ok();
772 })?;
773 }
774 }
775 Err(error) => {
776 log::warn!("ssh io task died with error: {:?}. reconnecting...", error);
777 this.update(cx, |this, cx| {
778 this.reconnect(cx).ok();
779 })?;
780 }
781 }
782
783 Ok(())
784 })
785 }
786
787 fn state_is(&self, check: impl FnOnce(&State) -> bool) -> bool {
788 self.state.as_ref().is_some_and(check)
789 }
790
791 fn try_set_state(&mut self, cx: &mut Context<Self>, map: impl FnOnce(&State) -> Option<State>) {
792 let new_state = self.state.as_ref().and_then(map);
793 if let Some(new_state) = new_state {
794 self.state.replace(new_state);
795 cx.notify();
796 }
797 }
798
799 fn set_state(&mut self, state: State, cx: &mut Context<Self>) {
800 log::info!("setting state to '{}'", &state);
801
802 let is_reconnect_exhausted = state.is_reconnect_exhausted();
803 let is_server_not_running = state.is_server_not_running();
804 self.state.replace(state);
805
806 if is_reconnect_exhausted || is_server_not_running {
807 cx.emit(RemoteClientEvent::Disconnected);
808 }
809 cx.notify();
810 }
811
812 pub fn shell(&self) -> Option<String> {
813 Some(self.remote_connection()?.shell())
814 }
815
816 pub fn default_system_shell(&self) -> Option<String> {
817 Some(self.remote_connection()?.default_system_shell())
818 }
819
820 pub fn shares_network_interface(&self) -> bool {
821 self.remote_connection()
822 .map_or(false, |connection| connection.shares_network_interface())
823 }
824
825 pub fn build_command(
826 &self,
827 program: Option<String>,
828 args: &[String],
829 env: &HashMap<String, String>,
830 working_dir: Option<String>,
831 port_forward: Option<(u16, String, u16)>,
832 ) -> Result<CommandTemplate> {
833 let Some(connection) = self.remote_connection() else {
834 return Err(anyhow!("no ssh connection"));
835 };
836 connection.build_command(program, args, env, working_dir, port_forward)
837 }
838
839 pub fn upload_directory(
840 &self,
841 src_path: PathBuf,
842 dest_path: RemotePathBuf,
843 cx: &App,
844 ) -> Task<Result<()>> {
845 let Some(connection) = self.remote_connection() else {
846 return Task::ready(Err(anyhow!("no ssh connection")));
847 };
848 connection.upload_directory(src_path, dest_path, cx)
849 }
850
851 pub fn proto_client(&self) -> AnyProtoClient {
852 self.client.clone().into()
853 }
854
855 pub fn connection_options(&self) -> RemoteConnectionOptions {
856 self.connection_options.clone()
857 }
858
859 pub fn connection_state(&self) -> ConnectionState {
860 self.state
861 .as_ref()
862 .map(ConnectionState::from)
863 .unwrap_or(ConnectionState::Disconnected)
864 }
865
866 pub fn is_disconnected(&self) -> bool {
867 self.connection_state() == ConnectionState::Disconnected
868 }
869
870 pub fn path_style(&self) -> PathStyle {
871 self.path_style
872 }
873
874 #[cfg(any(test, feature = "test-support"))]
875 pub fn simulate_disconnect(&self, client_cx: &mut App) -> Task<()> {
876 let opts = self.connection_options();
877 client_cx.spawn(async move |cx| {
878 let connection = cx
879 .update_global(|c: &mut ConnectionPool, _| {
880 if let Some(ConnectionPoolEntry::Connecting(c)) = c.connections.get(&opts) {
881 c.clone()
882 } else {
883 panic!("missing test connection")
884 }
885 })
886 .unwrap()
887 .await
888 .unwrap();
889
890 connection.simulate_disconnect(cx);
891 })
892 }
893
894 #[cfg(any(test, feature = "test-support"))]
895 pub fn fake_server(
896 client_cx: &mut gpui::TestAppContext,
897 server_cx: &mut gpui::TestAppContext,
898 ) -> (RemoteConnectionOptions, AnyProtoClient) {
899 let port = client_cx
900 .update(|cx| cx.default_global::<ConnectionPool>().connections.len() as u16 + 1);
901 let opts = RemoteConnectionOptions::Ssh(SshConnectionOptions {
902 host: "<fake>".to_string(),
903 port: Some(port),
904 ..Default::default()
905 });
906 let (outgoing_tx, _) = mpsc::unbounded::<Envelope>();
907 let (_, incoming_rx) = mpsc::unbounded::<Envelope>();
908 let server_client =
909 server_cx.update(|cx| ChannelClient::new(incoming_rx, outgoing_tx, cx, "fake-server"));
910 let connection: Arc<dyn RemoteConnection> = Arc::new(fake::FakeRemoteConnection {
911 connection_options: opts.clone(),
912 server_cx: fake::SendableCx::new(server_cx),
913 server_channel: server_client.clone(),
914 });
915
916 client_cx.update(|cx| {
917 cx.update_default_global(|c: &mut ConnectionPool, cx| {
918 c.connections.insert(
919 opts.clone(),
920 ConnectionPoolEntry::Connecting(
921 cx.background_spawn({
922 let connection = connection.clone();
923 async move { Ok(connection.clone()) }
924 })
925 .shared(),
926 ),
927 );
928 })
929 });
930
931 (opts, server_client.into())
932 }
933
934 #[cfg(any(test, feature = "test-support"))]
935 pub async fn fake_client(
936 opts: RemoteConnectionOptions,
937 client_cx: &mut gpui::TestAppContext,
938 ) -> Entity<Self> {
939 let (_tx, rx) = oneshot::channel();
940 client_cx
941 .update(|cx| {
942 Self::new(
943 ConnectionIdentifier::setup(),
944 opts,
945 rx,
946 Arc::new(fake::Delegate),
947 cx,
948 )
949 })
950 .await
951 .unwrap()
952 .unwrap()
953 }
954
955 fn remote_connection(&self) -> Option<Arc<dyn RemoteConnection>> {
956 self.state
957 .as_ref()
958 .and_then(|state| state.remote_connection())
959 }
960}
961
962enum ConnectionPoolEntry {
963 Connecting(Shared<Task<Result<Arc<dyn RemoteConnection>, Arc<anyhow::Error>>>>),
964 Connected(Weak<dyn RemoteConnection>),
965}
966
967#[derive(Default)]
968struct ConnectionPool {
969 connections: HashMap<RemoteConnectionOptions, ConnectionPoolEntry>,
970}
971
972impl Global for ConnectionPool {}
973
974impl ConnectionPool {
975 pub fn connect(
976 &mut self,
977 opts: RemoteConnectionOptions,
978 delegate: &Arc<dyn RemoteClientDelegate>,
979 cx: &mut App,
980 ) -> Shared<Task<Result<Arc<dyn RemoteConnection>, Arc<anyhow::Error>>>> {
981 let connection = self.connections.get(&opts);
982 match connection {
983 Some(ConnectionPoolEntry::Connecting(task)) => {
984 let delegate = delegate.clone();
985 cx.spawn(async move |cx| {
986 delegate.set_status(Some("Waiting for existing connection attempt"), cx);
987 })
988 .detach();
989 return task.clone();
990 }
991 Some(ConnectionPoolEntry::Connected(ssh)) => {
992 if let Some(ssh) = ssh.upgrade()
993 && !ssh.has_been_killed()
994 {
995 return Task::ready(Ok(ssh)).shared();
996 }
997 self.connections.remove(&opts);
998 }
999 None => {}
1000 }
1001
1002 let task = cx
1003 .spawn({
1004 let opts = opts.clone();
1005 let delegate = delegate.clone();
1006 async move |cx| {
1007 let connection = match opts.clone() {
1008 RemoteConnectionOptions::Ssh(opts) => {
1009 SshRemoteConnection::new(opts, delegate, cx)
1010 .await
1011 .map(|connection| Arc::new(connection) as Arc<dyn RemoteConnection>)
1012 }
1013 RemoteConnectionOptions::Wsl(opts) => {
1014 WslRemoteConnection::new(opts, delegate, cx)
1015 .await
1016 .map(|connection| Arc::new(connection) as Arc<dyn RemoteConnection>)
1017 }
1018 };
1019
1020 cx.update_global(|pool: &mut Self, _| {
1021 debug_assert!(matches!(
1022 pool.connections.get(&opts),
1023 Some(ConnectionPoolEntry::Connecting(_))
1024 ));
1025 match connection {
1026 Ok(connection) => {
1027 pool.connections.insert(
1028 opts.clone(),
1029 ConnectionPoolEntry::Connected(Arc::downgrade(&connection)),
1030 );
1031 Ok(connection)
1032 }
1033 Err(error) => {
1034 pool.connections.remove(&opts);
1035 Err(Arc::new(error))
1036 }
1037 }
1038 })?
1039 }
1040 })
1041 .shared();
1042
1043 self.connections
1044 .insert(opts.clone(), ConnectionPoolEntry::Connecting(task.clone()));
1045 task
1046 }
1047}
1048
1049#[derive(Debug, Clone, PartialEq, Eq, Hash)]
1050pub enum RemoteConnectionOptions {
1051 Ssh(SshConnectionOptions),
1052 Wsl(WslConnectionOptions),
1053}
1054
1055impl RemoteConnectionOptions {
1056 pub fn display_name(&self) -> String {
1057 match self {
1058 RemoteConnectionOptions::Ssh(opts) => opts.host.clone(),
1059 RemoteConnectionOptions::Wsl(opts) => opts.distro_name.clone(),
1060 }
1061 }
1062}
1063
1064impl From<SshConnectionOptions> for RemoteConnectionOptions {
1065 fn from(opts: SshConnectionOptions) -> Self {
1066 RemoteConnectionOptions::Ssh(opts)
1067 }
1068}
1069
1070impl From<WslConnectionOptions> for RemoteConnectionOptions {
1071 fn from(opts: WslConnectionOptions) -> Self {
1072 RemoteConnectionOptions::Wsl(opts)
1073 }
1074}
1075
1076#[async_trait(?Send)]
1077pub(crate) trait RemoteConnection: Send + Sync {
1078 fn start_proxy(
1079 &self,
1080 unique_identifier: String,
1081 reconnect: bool,
1082 incoming_tx: UnboundedSender<Envelope>,
1083 outgoing_rx: UnboundedReceiver<Envelope>,
1084 connection_activity_tx: Sender<()>,
1085 delegate: Arc<dyn RemoteClientDelegate>,
1086 cx: &mut AsyncApp,
1087 ) -> Task<Result<i32>>;
1088 fn upload_directory(
1089 &self,
1090 src_path: PathBuf,
1091 dest_path: RemotePathBuf,
1092 cx: &App,
1093 ) -> Task<Result<()>>;
1094 async fn kill(&self) -> Result<()>;
1095 fn has_been_killed(&self) -> bool;
1096 fn shares_network_interface(&self) -> bool {
1097 false
1098 }
1099 fn build_command(
1100 &self,
1101 program: Option<String>,
1102 args: &[String],
1103 env: &HashMap<String, String>,
1104 working_dir: Option<String>,
1105 port_forward: Option<(u16, String, u16)>,
1106 ) -> Result<CommandTemplate>;
1107 fn connection_options(&self) -> RemoteConnectionOptions;
1108 fn path_style(&self) -> PathStyle;
1109 fn shell(&self) -> String;
1110 fn default_system_shell(&self) -> String;
1111
1112 #[cfg(any(test, feature = "test-support"))]
1113 fn simulate_disconnect(&self, _: &AsyncApp) {}
1114}
1115
1116type ResponseChannels = Mutex<HashMap<MessageId, oneshot::Sender<(Envelope, oneshot::Sender<()>)>>>;
1117
1118struct Signal<T> {
1119 tx: Mutex<Option<oneshot::Sender<T>>>,
1120 rx: Shared<Task<Option<T>>>,
1121}
1122
1123impl<T: Send + Clone + 'static> Signal<T> {
1124 pub fn new(cx: &App) -> Self {
1125 let (tx, rx) = oneshot::channel();
1126
1127 let task = cx
1128 .background_executor()
1129 .spawn(async move { rx.await.ok() })
1130 .shared();
1131
1132 Self {
1133 tx: Mutex::new(Some(tx)),
1134 rx: task,
1135 }
1136 }
1137
1138 fn set(&self, value: T) {
1139 if let Some(tx) = self.tx.lock().take() {
1140 let _ = tx.send(value);
1141 }
1142 }
1143
1144 fn wait(&self) -> Shared<Task<Option<T>>> {
1145 self.rx.clone()
1146 }
1147}
1148
1149struct ChannelClient {
1150 next_message_id: AtomicU32,
1151 outgoing_tx: Mutex<mpsc::UnboundedSender<Envelope>>,
1152 buffer: Mutex<VecDeque<Envelope>>,
1153 response_channels: ResponseChannels,
1154 message_handlers: Mutex<ProtoMessageHandlerSet>,
1155 max_received: AtomicU32,
1156 name: &'static str,
1157 task: Mutex<Task<Result<()>>>,
1158 remote_started: Signal<()>,
1159}
1160
1161impl ChannelClient {
1162 fn new(
1163 incoming_rx: mpsc::UnboundedReceiver<Envelope>,
1164 outgoing_tx: mpsc::UnboundedSender<Envelope>,
1165 cx: &App,
1166 name: &'static str,
1167 ) -> Arc<Self> {
1168 Arc::new_cyclic(|this| Self {
1169 outgoing_tx: Mutex::new(outgoing_tx),
1170 next_message_id: AtomicU32::new(0),
1171 max_received: AtomicU32::new(0),
1172 response_channels: ResponseChannels::default(),
1173 message_handlers: Default::default(),
1174 buffer: Mutex::new(VecDeque::new()),
1175 name,
1176 task: Mutex::new(Self::start_handling_messages(
1177 this.clone(),
1178 incoming_rx,
1179 &cx.to_async(),
1180 )),
1181 remote_started: Signal::new(cx),
1182 })
1183 }
1184
1185 fn wait_for_remote_started(&self) -> Shared<Task<Option<()>>> {
1186 self.remote_started.wait()
1187 }
1188
1189 fn start_handling_messages(
1190 this: Weak<Self>,
1191 mut incoming_rx: mpsc::UnboundedReceiver<Envelope>,
1192 cx: &AsyncApp,
1193 ) -> Task<Result<()>> {
1194 cx.spawn(async move |cx| {
1195 if let Some(this) = this.upgrade() {
1196 let envelope = proto::RemoteStarted {}.into_envelope(0, None, None);
1197 this.outgoing_tx.lock().unbounded_send(envelope).ok();
1198 };
1199
1200 let peer_id = PeerId { owner_id: 0, id: 0 };
1201 while let Some(incoming) = incoming_rx.next().await {
1202 let Some(this) = this.upgrade() else {
1203 return anyhow::Ok(());
1204 };
1205 if let Some(ack_id) = incoming.ack_id {
1206 let mut buffer = this.buffer.lock();
1207 while buffer.front().is_some_and(|msg| msg.id <= ack_id) {
1208 buffer.pop_front();
1209 }
1210 }
1211 if let Some(proto::envelope::Payload::FlushBufferedMessages(_)) = &incoming.payload
1212 {
1213 log::debug!(
1214 "{}:ssh message received. name:FlushBufferedMessages",
1215 this.name
1216 );
1217 {
1218 let buffer = this.buffer.lock();
1219 for envelope in buffer.iter() {
1220 this.outgoing_tx
1221 .lock()
1222 .unbounded_send(envelope.clone())
1223 .ok();
1224 }
1225 }
1226 let mut envelope = proto::Ack {}.into_envelope(0, Some(incoming.id), None);
1227 envelope.id = this.next_message_id.fetch_add(1, SeqCst);
1228 this.outgoing_tx.lock().unbounded_send(envelope).ok();
1229 continue;
1230 }
1231
1232 if let Some(proto::envelope::Payload::RemoteStarted(_)) = &incoming.payload {
1233 this.remote_started.set(());
1234 let mut envelope = proto::Ack {}.into_envelope(0, Some(incoming.id), None);
1235 envelope.id = this.next_message_id.fetch_add(1, SeqCst);
1236 this.outgoing_tx.lock().unbounded_send(envelope).ok();
1237 continue;
1238 }
1239
1240 this.max_received.store(incoming.id, SeqCst);
1241
1242 if let Some(request_id) = incoming.responding_to {
1243 let request_id = MessageId(request_id);
1244 let sender = this.response_channels.lock().remove(&request_id);
1245 if let Some(sender) = sender {
1246 let (tx, rx) = oneshot::channel();
1247 if incoming.payload.is_some() {
1248 sender.send((incoming, tx)).ok();
1249 }
1250 rx.await.ok();
1251 }
1252 } else if let Some(envelope) =
1253 build_typed_envelope(peer_id, Instant::now(), incoming)
1254 {
1255 let type_name = envelope.payload_type_name();
1256 let message_id = envelope.message_id();
1257 if let Some(future) = ProtoMessageHandlerSet::handle_message(
1258 &this.message_handlers,
1259 envelope,
1260 this.clone().into(),
1261 cx.clone(),
1262 ) {
1263 log::debug!("{}:ssh message received. name:{type_name}", this.name);
1264 cx.foreground_executor()
1265 .spawn(async move {
1266 match future.await {
1267 Ok(_) => {
1268 log::debug!(
1269 "{}:ssh message handled. name:{type_name}",
1270 this.name
1271 );
1272 }
1273 Err(error) => {
1274 log::error!(
1275 "{}:error handling message. type:{}, error:{:#}",
1276 this.name,
1277 type_name,
1278 format!("{error:#}").lines().fold(
1279 String::new(),
1280 |mut message, line| {
1281 if !message.is_empty() {
1282 message.push(' ');
1283 }
1284 message.push_str(line);
1285 message
1286 }
1287 )
1288 );
1289 }
1290 }
1291 })
1292 .detach()
1293 } else {
1294 log::error!("{}:unhandled ssh message name:{type_name}", this.name);
1295 if let Err(e) = AnyProtoClient::from(this.clone()).send_response(
1296 message_id,
1297 anyhow::anyhow!("no handler registered for {type_name}").to_proto(),
1298 ) {
1299 log::error!(
1300 "{}:error sending error response for {type_name}:{e:#}",
1301 this.name
1302 );
1303 }
1304 }
1305 }
1306 }
1307 anyhow::Ok(())
1308 })
1309 }
1310
1311 fn reconnect(
1312 self: &Arc<Self>,
1313 incoming_rx: UnboundedReceiver<Envelope>,
1314 outgoing_tx: UnboundedSender<Envelope>,
1315 cx: &AsyncApp,
1316 ) {
1317 *self.outgoing_tx.lock() = outgoing_tx;
1318 *self.task.lock() = Self::start_handling_messages(Arc::downgrade(self), incoming_rx, cx);
1319 }
1320
1321 fn request<T: RequestMessage>(
1322 &self,
1323 payload: T,
1324 ) -> impl 'static + Future<Output = Result<T::Response>> {
1325 self.request_internal(payload, true)
1326 }
1327
1328 fn request_internal<T: RequestMessage>(
1329 &self,
1330 payload: T,
1331 use_buffer: bool,
1332 ) -> impl 'static + Future<Output = Result<T::Response>> {
1333 log::debug!("ssh request start. name:{}", T::NAME);
1334 let response =
1335 self.request_dynamic(payload.into_envelope(0, None, None), T::NAME, use_buffer);
1336 async move {
1337 let response = response.await?;
1338 log::debug!("ssh request finish. name:{}", T::NAME);
1339 T::Response::from_envelope(response).context("received a response of the wrong type")
1340 }
1341 }
1342
1343 async fn resync(&self, timeout: Duration) -> Result<()> {
1344 smol::future::or(
1345 async {
1346 self.request_internal(proto::FlushBufferedMessages {}, false)
1347 .await?;
1348
1349 for envelope in self.buffer.lock().iter() {
1350 self.outgoing_tx
1351 .lock()
1352 .unbounded_send(envelope.clone())
1353 .ok();
1354 }
1355 Ok(())
1356 },
1357 async {
1358 smol::Timer::after(timeout).await;
1359 anyhow::bail!("Timed out resyncing remote client")
1360 },
1361 )
1362 .await
1363 }
1364
1365 async fn ping(&self, timeout: Duration) -> Result<()> {
1366 smol::future::or(
1367 async {
1368 self.request(proto::Ping {}).await?;
1369 Ok(())
1370 },
1371 async {
1372 smol::Timer::after(timeout).await;
1373 anyhow::bail!("Timed out pinging remote client")
1374 },
1375 )
1376 .await
1377 }
1378
1379 fn send<T: EnvelopedMessage>(&self, payload: T) -> Result<()> {
1380 log::debug!("ssh send name:{}", T::NAME);
1381 self.send_dynamic(payload.into_envelope(0, None, None))
1382 }
1383
1384 fn request_dynamic(
1385 &self,
1386 mut envelope: proto::Envelope,
1387 type_name: &'static str,
1388 use_buffer: bool,
1389 ) -> impl 'static + Future<Output = Result<proto::Envelope>> {
1390 envelope.id = self.next_message_id.fetch_add(1, SeqCst);
1391 let (tx, rx) = oneshot::channel();
1392 let mut response_channels_lock = self.response_channels.lock();
1393 response_channels_lock.insert(MessageId(envelope.id), tx);
1394 drop(response_channels_lock);
1395
1396 let result = if use_buffer {
1397 self.send_buffered(envelope)
1398 } else {
1399 self.send_unbuffered(envelope)
1400 };
1401 async move {
1402 if let Err(error) = &result {
1403 log::error!("failed to send message: {error}");
1404 anyhow::bail!("failed to send message: {error}");
1405 }
1406
1407 let response = rx.await.context("connection lost")?.0;
1408 if let Some(proto::envelope::Payload::Error(error)) = &response.payload {
1409 return Err(RpcError::from_proto(error, type_name));
1410 }
1411 Ok(response)
1412 }
1413 }
1414
1415 pub fn send_dynamic(&self, mut envelope: proto::Envelope) -> Result<()> {
1416 envelope.id = self.next_message_id.fetch_add(1, SeqCst);
1417 self.send_buffered(envelope)
1418 }
1419
1420 fn send_buffered(&self, mut envelope: proto::Envelope) -> Result<()> {
1421 envelope.ack_id = Some(self.max_received.load(SeqCst));
1422 self.buffer.lock().push_back(envelope.clone());
1423 // ignore errors on send (happen while we're reconnecting)
1424 // assume that the global "disconnected" overlay is sufficient.
1425 self.outgoing_tx.lock().unbounded_send(envelope).ok();
1426 Ok(())
1427 }
1428
1429 fn send_unbuffered(&self, mut envelope: proto::Envelope) -> Result<()> {
1430 envelope.ack_id = Some(self.max_received.load(SeqCst));
1431 self.outgoing_tx.lock().unbounded_send(envelope).ok();
1432 Ok(())
1433 }
1434}
1435
1436impl ProtoClient for ChannelClient {
1437 fn request(
1438 &self,
1439 envelope: proto::Envelope,
1440 request_type: &'static str,
1441 ) -> BoxFuture<'static, Result<proto::Envelope>> {
1442 self.request_dynamic(envelope, request_type, true).boxed()
1443 }
1444
1445 fn send(&self, envelope: proto::Envelope, _message_type: &'static str) -> Result<()> {
1446 self.send_dynamic(envelope)
1447 }
1448
1449 fn send_response(&self, envelope: Envelope, _message_type: &'static str) -> anyhow::Result<()> {
1450 self.send_dynamic(envelope)
1451 }
1452
1453 fn message_handler_set(&self) -> &Mutex<ProtoMessageHandlerSet> {
1454 &self.message_handlers
1455 }
1456
1457 fn is_via_collab(&self) -> bool {
1458 false
1459 }
1460}
1461
1462#[cfg(any(test, feature = "test-support"))]
1463mod fake {
1464 use super::{ChannelClient, RemoteClientDelegate, RemoteConnection, RemotePlatform};
1465 use crate::remote_client::{CommandTemplate, RemoteConnectionOptions};
1466 use anyhow::Result;
1467 use askpass::EncryptedPassword;
1468 use async_trait::async_trait;
1469 use collections::HashMap;
1470 use futures::{
1471 FutureExt, SinkExt, StreamExt,
1472 channel::{
1473 mpsc::{self, Sender},
1474 oneshot,
1475 },
1476 select_biased,
1477 };
1478 use gpui::{App, AppContext as _, AsyncApp, SemanticVersion, Task, TestAppContext};
1479 use release_channel::ReleaseChannel;
1480 use rpc::proto::Envelope;
1481 use std::{path::PathBuf, sync::Arc};
1482 use util::paths::{PathStyle, RemotePathBuf};
1483
1484 pub(super) struct FakeRemoteConnection {
1485 pub(super) connection_options: RemoteConnectionOptions,
1486 pub(super) server_channel: Arc<ChannelClient>,
1487 pub(super) server_cx: SendableCx,
1488 }
1489
1490 pub(super) struct SendableCx(AsyncApp);
1491 impl SendableCx {
1492 // SAFETY: When run in test mode, GPUI is always single threaded.
1493 pub(super) fn new(cx: &TestAppContext) -> Self {
1494 Self(cx.to_async())
1495 }
1496
1497 // SAFETY: Enforce that we're on the main thread by requiring a valid AsyncApp
1498 fn get(&self, _: &AsyncApp) -> AsyncApp {
1499 self.0.clone()
1500 }
1501 }
1502
1503 // SAFETY: There is no way to access a SendableCx from a different thread, see [`SendableCx::new`] and [`SendableCx::get`]
1504 unsafe impl Send for SendableCx {}
1505 unsafe impl Sync for SendableCx {}
1506
1507 #[async_trait(?Send)]
1508 impl RemoteConnection for FakeRemoteConnection {
1509 async fn kill(&self) -> Result<()> {
1510 Ok(())
1511 }
1512
1513 fn has_been_killed(&self) -> bool {
1514 false
1515 }
1516
1517 fn build_command(
1518 &self,
1519 program: Option<String>,
1520 args: &[String],
1521 env: &HashMap<String, String>,
1522 _: Option<String>,
1523 _: Option<(u16, String, u16)>,
1524 ) -> Result<CommandTemplate> {
1525 let ssh_program = program.unwrap_or_else(|| "sh".to_string());
1526 let mut ssh_args = Vec::new();
1527 ssh_args.push(ssh_program);
1528 ssh_args.extend(args.iter().cloned());
1529 Ok(CommandTemplate {
1530 program: "ssh".into(),
1531 args: ssh_args,
1532 env: env.clone(),
1533 })
1534 }
1535
1536 fn upload_directory(
1537 &self,
1538 _src_path: PathBuf,
1539 _dest_path: RemotePathBuf,
1540 _cx: &App,
1541 ) -> Task<Result<()>> {
1542 unreachable!()
1543 }
1544
1545 fn connection_options(&self) -> RemoteConnectionOptions {
1546 self.connection_options.clone()
1547 }
1548
1549 fn simulate_disconnect(&self, cx: &AsyncApp) {
1550 let (outgoing_tx, _) = mpsc::unbounded::<Envelope>();
1551 let (_, incoming_rx) = mpsc::unbounded::<Envelope>();
1552 self.server_channel
1553 .reconnect(incoming_rx, outgoing_tx, &self.server_cx.get(cx));
1554 }
1555
1556 fn start_proxy(
1557 &self,
1558 _unique_identifier: String,
1559 _reconnect: bool,
1560 mut client_incoming_tx: mpsc::UnboundedSender<Envelope>,
1561 mut client_outgoing_rx: mpsc::UnboundedReceiver<Envelope>,
1562 mut connection_activity_tx: Sender<()>,
1563 _delegate: Arc<dyn RemoteClientDelegate>,
1564 cx: &mut AsyncApp,
1565 ) -> Task<Result<i32>> {
1566 let (mut server_incoming_tx, server_incoming_rx) = mpsc::unbounded::<Envelope>();
1567 let (server_outgoing_tx, mut server_outgoing_rx) = mpsc::unbounded::<Envelope>();
1568
1569 self.server_channel.reconnect(
1570 server_incoming_rx,
1571 server_outgoing_tx,
1572 &self.server_cx.get(cx),
1573 );
1574
1575 cx.background_spawn(async move {
1576 loop {
1577 select_biased! {
1578 server_to_client = server_outgoing_rx.next().fuse() => {
1579 let Some(server_to_client) = server_to_client else {
1580 return Ok(1)
1581 };
1582 connection_activity_tx.try_send(()).ok();
1583 client_incoming_tx.send(server_to_client).await.ok();
1584 }
1585 client_to_server = client_outgoing_rx.next().fuse() => {
1586 let Some(client_to_server) = client_to_server else {
1587 return Ok(1)
1588 };
1589 server_incoming_tx.send(client_to_server).await.ok();
1590 }
1591 }
1592 }
1593 })
1594 }
1595
1596 fn path_style(&self) -> PathStyle {
1597 PathStyle::local()
1598 }
1599
1600 fn shell(&self) -> String {
1601 "sh".to_owned()
1602 }
1603
1604 fn default_system_shell(&self) -> String {
1605 "sh".to_owned()
1606 }
1607 }
1608
1609 pub(super) struct Delegate;
1610
1611 impl RemoteClientDelegate for Delegate {
1612 fn ask_password(&self, _: String, _: oneshot::Sender<EncryptedPassword>, _: &mut AsyncApp) {
1613 unreachable!()
1614 }
1615
1616 fn download_server_binary_locally(
1617 &self,
1618 _: RemotePlatform,
1619 _: ReleaseChannel,
1620 _: Option<SemanticVersion>,
1621 _: &mut AsyncApp,
1622 ) -> Task<Result<PathBuf>> {
1623 unreachable!()
1624 }
1625
1626 fn get_download_params(
1627 &self,
1628 _platform: RemotePlatform,
1629 _release_channel: ReleaseChannel,
1630 _version: Option<SemanticVersion>,
1631 _cx: &mut AsyncApp,
1632 ) -> Task<Result<Option<(String, String)>>> {
1633 unreachable!()
1634 }
1635
1636 fn set_status(&self, _: Option<&str>, _: &mut AsyncApp) {}
1637 }
1638}