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 remote_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 {
141 remote_connection: ssh_connection,
142 ..
143 } => Some(ssh_connection.clone()),
144 Self::HeartbeatMissed { ssh_connection, .. } => Some(ssh_connection.clone()),
145 Self::ReconnectFailed { ssh_connection, .. } => Some(ssh_connection.clone()),
146 _ => None,
147 }
148 }
149
150 const fn can_reconnect(&self) -> bool {
151 match self {
152 Self::Connected { .. }
153 | Self::HeartbeatMissed { .. }
154 | Self::ReconnectFailed { .. } => true,
155 State::Connecting
156 | State::Reconnecting
157 | State::ReconnectExhausted
158 | State::ServerNotRunning => false,
159 }
160 }
161
162 const fn is_reconnect_failed(&self) -> bool {
163 matches!(self, Self::ReconnectFailed { .. })
164 }
165
166 const fn is_reconnect_exhausted(&self) -> bool {
167 matches!(self, Self::ReconnectExhausted { .. })
168 }
169
170 const fn is_server_not_running(&self) -> bool {
171 matches!(self, Self::ServerNotRunning)
172 }
173
174 const fn is_reconnecting(&self) -> bool {
175 matches!(self, Self::Reconnecting { .. })
176 }
177
178 fn heartbeat_recovered(self) -> Self {
179 match self {
180 Self::HeartbeatMissed {
181 ssh_connection,
182 delegate,
183 multiplex_task,
184 heartbeat_task,
185 ..
186 } => Self::Connected {
187 remote_connection: ssh_connection,
188 delegate,
189 multiplex_task,
190 heartbeat_task,
191 },
192 _ => self,
193 }
194 }
195
196 fn heartbeat_missed(self) -> Self {
197 match self {
198 Self::Connected {
199 remote_connection: ssh_connection,
200 delegate,
201 multiplex_task,
202 heartbeat_task,
203 } => Self::HeartbeatMissed {
204 missed_heartbeats: 1,
205 ssh_connection,
206 delegate,
207 multiplex_task,
208 heartbeat_task,
209 },
210 Self::HeartbeatMissed {
211 missed_heartbeats,
212 ssh_connection,
213 delegate,
214 multiplex_task,
215 heartbeat_task,
216 } => Self::HeartbeatMissed {
217 missed_heartbeats: missed_heartbeats + 1,
218 ssh_connection,
219 delegate,
220 multiplex_task,
221 heartbeat_task,
222 },
223 _ => self,
224 }
225 }
226}
227
228/// The state of the ssh connection.
229#[derive(Clone, Copy, Debug, PartialEq, Eq)]
230pub enum ConnectionState {
231 Connecting,
232 Connected,
233 HeartbeatMissed,
234 Reconnecting,
235 Disconnected,
236}
237
238impl From<&State> for ConnectionState {
239 fn from(value: &State) -> Self {
240 match value {
241 State::Connecting => Self::Connecting,
242 State::Connected { .. } => Self::Connected,
243 State::Reconnecting | State::ReconnectFailed { .. } => Self::Reconnecting,
244 State::HeartbeatMissed { .. } => Self::HeartbeatMissed,
245 State::ReconnectExhausted => Self::Disconnected,
246 State::ServerNotRunning => Self::Disconnected,
247 }
248 }
249}
250
251pub struct RemoteClient {
252 client: Arc<ChannelClient>,
253 unique_identifier: String,
254 connection_options: RemoteConnectionOptions,
255 path_style: PathStyle,
256 state: Option<State>,
257}
258
259#[derive(Debug)]
260pub enum RemoteClientEvent {
261 Disconnected,
262}
263
264impl EventEmitter<RemoteClientEvent> for RemoteClient {}
265
266/// Identifies the socket on the remote server so that reconnects
267/// can re-join the same project.
268pub enum ConnectionIdentifier {
269 Setup(u64),
270 Workspace(i64),
271}
272
273static NEXT_ID: AtomicU64 = AtomicU64::new(1);
274
275impl ConnectionIdentifier {
276 pub fn setup() -> Self {
277 Self::Setup(NEXT_ID.fetch_add(1, SeqCst))
278 }
279
280 // This string gets used in a socket name, and so must be relatively short.
281 // The total length of:
282 // /home/{username}/.local/share/zed/server_state/{name}/stdout.sock
283 // Must be less than about 100 characters
284 // https://unix.stackexchange.com/questions/367008/why-is-socket-path-length-limited-to-a-hundred-chars
285 // So our strings should be at most 20 characters or so.
286 fn to_string(&self, cx: &App) -> String {
287 let identifier_prefix = match ReleaseChannel::global(cx) {
288 ReleaseChannel::Stable => "".to_string(),
289 release_channel => format!("{}-", release_channel.dev_name()),
290 };
291 match self {
292 Self::Setup(setup_id) => format!("{identifier_prefix}setup-{setup_id}"),
293 Self::Workspace(workspace_id) => {
294 format!("{identifier_prefix}workspace-{workspace_id}",)
295 }
296 }
297 }
298}
299
300pub async fn connect(
301 connection_options: RemoteConnectionOptions,
302 delegate: Arc<dyn RemoteClientDelegate>,
303 cx: &mut AsyncApp,
304) -> Result<Arc<dyn RemoteConnection>> {
305 cx.update(|cx| {
306 cx.update_default_global(|pool: &mut ConnectionPool, cx| {
307 pool.connect(connection_options.clone(), delegate.clone(), cx)
308 })
309 })?
310 .await
311 .map_err(|e| e.cloned())
312}
313
314impl RemoteClient {
315 pub fn new(
316 unique_identifier: ConnectionIdentifier,
317 remote_connection: Arc<dyn RemoteConnection>,
318 cancellation: oneshot::Receiver<()>,
319 delegate: Arc<dyn RemoteClientDelegate>,
320 cx: &mut App,
321 ) -> Task<Result<Option<Entity<Self>>>> {
322 let unique_identifier = unique_identifier.to_string(cx);
323 cx.spawn(async move |cx| {
324 let success = Box::pin(async move {
325 let (outgoing_tx, outgoing_rx) = mpsc::unbounded::<Envelope>();
326 let (incoming_tx, incoming_rx) = mpsc::unbounded::<Envelope>();
327 let (connection_activity_tx, connection_activity_rx) = mpsc::channel::<()>(1);
328
329 let client =
330 cx.update(|cx| ChannelClient::new(incoming_rx, outgoing_tx, cx, "client"))?;
331
332 let path_style = remote_connection.path_style();
333 let this = cx.new(|_| Self {
334 client: client.clone(),
335 unique_identifier: unique_identifier.clone(),
336 connection_options: remote_connection.connection_options(),
337 path_style,
338 state: Some(State::Connecting),
339 })?;
340
341 let io_task = remote_connection.start_proxy(
342 unique_identifier,
343 false,
344 incoming_tx,
345 outgoing_rx,
346 connection_activity_tx,
347 delegate.clone(),
348 cx,
349 );
350
351 let ready = client
352 .wait_for_remote_started()
353 .with_timeout(HEARTBEAT_TIMEOUT, cx.background_executor())
354 .await;
355 match ready {
356 Ok(Some(_)) => {}
357 Ok(None) => {
358 let mut error = "remote client exited before becoming ready".to_owned();
359 if let Some(status) = io_task.now_or_never() {
360 match status {
361 Ok(exit_code) => {
362 error.push_str(&format!(", exit_code={exit_code:?}"))
363 }
364 Err(e) => error.push_str(&format!(", error={e:?}")),
365 }
366 }
367 let error = anyhow::anyhow!("{error}");
368 log::error!("failed to establish connection: {}", error);
369 return Err(error);
370 }
371 Err(_) => {
372 let mut error =
373 "remote client did not become ready within the timeout".to_owned();
374 if let Some(status) = io_task.now_or_never() {
375 match status {
376 Ok(exit_code) => {
377 error.push_str(&format!(", exit_code={exit_code:?}"))
378 }
379 Err(e) => error.push_str(&format!(", error={e:?}")),
380 }
381 }
382 let error = anyhow::anyhow!("{error}");
383 log::error!("failed to establish connection: {}", error);
384 return Err(error);
385 }
386 }
387 let multiplex_task = Self::monitor(this.downgrade(), io_task, cx);
388 if let Err(error) = client.ping(HEARTBEAT_TIMEOUT).await {
389 log::error!("failed to establish connection: {}", error);
390 return Err(error);
391 }
392
393 let heartbeat_task = Self::heartbeat(this.downgrade(), connection_activity_rx, cx);
394
395 this.update(cx, |this, _| {
396 this.state = Some(State::Connected {
397 remote_connection,
398 delegate,
399 multiplex_task,
400 heartbeat_task,
401 });
402 })?;
403
404 Ok(Some(this))
405 });
406
407 select! {
408 _ = cancellation.fuse() => {
409 Ok(None)
410 }
411 result = success.fuse() => result
412 }
413 })
414 }
415
416 pub fn proto_client_from_channels(
417 incoming_rx: mpsc::UnboundedReceiver<Envelope>,
418 outgoing_tx: mpsc::UnboundedSender<Envelope>,
419 cx: &App,
420 name: &'static str,
421 ) -> AnyProtoClient {
422 ChannelClient::new(incoming_rx, outgoing_tx, cx, name).into()
423 }
424
425 pub fn shutdown_processes<T: RequestMessage>(
426 &mut self,
427 shutdown_request: Option<T>,
428 executor: BackgroundExecutor,
429 ) -> Option<impl Future<Output = ()> + use<T>> {
430 let state = self.state.take()?;
431 log::info!("shutting down ssh processes");
432
433 let State::Connected {
434 multiplex_task,
435 heartbeat_task,
436 remote_connection: ssh_connection,
437 delegate,
438 } = state
439 else {
440 return None;
441 };
442
443 let client = self.client.clone();
444
445 Some(async move {
446 if let Some(shutdown_request) = shutdown_request {
447 client.send(shutdown_request).log_err();
448 // We wait 50ms instead of waiting for a response, because
449 // waiting for a response would require us to wait on the main thread
450 // which we want to avoid in an `on_app_quit` callback.
451 executor.timer(Duration::from_millis(50)).await;
452 }
453
454 // Drop `multiplex_task` because it owns our ssh_proxy_process, which is a
455 // child of master_process.
456 drop(multiplex_task);
457 // Now drop the rest of state, which kills master process.
458 drop(heartbeat_task);
459 drop(ssh_connection);
460 drop(delegate);
461 })
462 }
463
464 fn reconnect(&mut self, cx: &mut Context<Self>) -> Result<()> {
465 let can_reconnect = self
466 .state
467 .as_ref()
468 .map(|state| state.can_reconnect())
469 .unwrap_or(false);
470 if !can_reconnect {
471 log::info!("aborting reconnect, because not in state that allows reconnecting");
472 let error = if let Some(state) = self.state.as_ref() {
473 format!("invalid state, cannot reconnect while in state {state}")
474 } else {
475 "no state set".to_string()
476 };
477 anyhow::bail!(error);
478 }
479
480 let state = self.state.take().unwrap();
481 let (attempts, remote_connection, delegate) = match state {
482 State::Connected {
483 remote_connection: ssh_connection,
484 delegate,
485 multiplex_task,
486 heartbeat_task,
487 }
488 | State::HeartbeatMissed {
489 ssh_connection,
490 delegate,
491 multiplex_task,
492 heartbeat_task,
493 ..
494 } => {
495 drop(multiplex_task);
496 drop(heartbeat_task);
497 (0, ssh_connection, delegate)
498 }
499 State::ReconnectFailed {
500 attempts,
501 ssh_connection,
502 delegate,
503 ..
504 } => (attempts, ssh_connection, delegate),
505 State::Connecting
506 | State::Reconnecting
507 | State::ReconnectExhausted
508 | State::ServerNotRunning => unreachable!(),
509 };
510
511 let attempts = attempts + 1;
512 if attempts > MAX_RECONNECT_ATTEMPTS {
513 log::error!(
514 "Failed to reconnect to after {} attempts, giving up",
515 MAX_RECONNECT_ATTEMPTS
516 );
517 self.set_state(State::ReconnectExhausted, cx);
518 return Ok(());
519 }
520
521 self.set_state(State::Reconnecting, cx);
522
523 log::info!("Trying to reconnect to ssh server... Attempt {}", attempts);
524
525 let unique_identifier = self.unique_identifier.clone();
526 let client = self.client.clone();
527 let reconnect_task = cx.spawn(async move |this, cx| {
528 macro_rules! failed {
529 ($error:expr, $attempts:expr, $ssh_connection:expr, $delegate:expr) => {
530 return State::ReconnectFailed {
531 error: anyhow!($error),
532 attempts: $attempts,
533 ssh_connection: $ssh_connection,
534 delegate: $delegate,
535 };
536 };
537 }
538
539 if let Err(error) = remote_connection
540 .kill()
541 .await
542 .context("Failed to kill ssh process")
543 {
544 failed!(error, attempts, remote_connection, delegate);
545 };
546
547 let connection_options = remote_connection.connection_options();
548
549 let (outgoing_tx, outgoing_rx) = mpsc::unbounded::<Envelope>();
550 let (incoming_tx, incoming_rx) = mpsc::unbounded::<Envelope>();
551 let (connection_activity_tx, connection_activity_rx) = mpsc::channel::<()>(1);
552
553 let (ssh_connection, io_task) = match async {
554 let ssh_connection = cx
555 .update_global(|pool: &mut ConnectionPool, cx| {
556 pool.connect(connection_options, delegate.clone(), cx)
557 })?
558 .await
559 .map_err(|error| error.cloned())?;
560
561 let io_task = ssh_connection.start_proxy(
562 unique_identifier,
563 true,
564 incoming_tx,
565 outgoing_rx,
566 connection_activity_tx,
567 delegate.clone(),
568 cx,
569 );
570 anyhow::Ok((ssh_connection, io_task))
571 }
572 .await
573 {
574 Ok((ssh_connection, io_task)) => (ssh_connection, io_task),
575 Err(error) => {
576 failed!(error, attempts, remote_connection, delegate);
577 }
578 };
579
580 let multiplex_task = Self::monitor(this.clone(), io_task, cx);
581 client.reconnect(incoming_rx, outgoing_tx, cx);
582
583 if let Err(error) = client.resync(HEARTBEAT_TIMEOUT).await {
584 failed!(error, attempts, ssh_connection, delegate);
585 };
586
587 State::Connected {
588 remote_connection: ssh_connection,
589 delegate,
590 multiplex_task,
591 heartbeat_task: Self::heartbeat(this.clone(), connection_activity_rx, cx),
592 }
593 });
594
595 cx.spawn(async move |this, cx| {
596 let new_state = reconnect_task.await;
597 this.update(cx, |this, cx| {
598 this.try_set_state(cx, |old_state| {
599 if old_state.is_reconnecting() {
600 match &new_state {
601 State::Connecting
602 | State::Reconnecting
603 | State::HeartbeatMissed { .. }
604 | State::ServerNotRunning => {}
605 State::Connected { .. } => {
606 log::info!("Successfully reconnected");
607 }
608 State::ReconnectFailed {
609 error, attempts, ..
610 } => {
611 log::error!(
612 "Reconnect attempt {} failed: {:?}. Starting new attempt...",
613 attempts,
614 error
615 );
616 }
617 State::ReconnectExhausted => {
618 log::error!("Reconnect attempt failed and all attempts exhausted");
619 }
620 }
621 Some(new_state)
622 } else {
623 None
624 }
625 });
626
627 if this.state_is(State::is_reconnect_failed) {
628 this.reconnect(cx)
629 } else if this.state_is(State::is_reconnect_exhausted) {
630 Ok(())
631 } else {
632 log::debug!("State has transition from Reconnecting into new state while attempting reconnect.");
633 Ok(())
634 }
635 })
636 })
637 .detach_and_log_err(cx);
638
639 Ok(())
640 }
641
642 fn heartbeat(
643 this: WeakEntity<Self>,
644 mut connection_activity_rx: mpsc::Receiver<()>,
645 cx: &mut AsyncApp,
646 ) -> Task<Result<()>> {
647 let Ok(client) = this.read_with(cx, |this, _| this.client.clone()) else {
648 return Task::ready(Err(anyhow!("SshRemoteClient lost")));
649 };
650
651 cx.spawn(async move |cx| {
652 let mut missed_heartbeats = 0;
653
654 let keepalive_timer = cx.background_executor().timer(HEARTBEAT_INTERVAL).fuse();
655 futures::pin_mut!(keepalive_timer);
656
657 loop {
658 select_biased! {
659 result = connection_activity_rx.next().fuse() => {
660 if result.is_none() {
661 log::warn!("ssh heartbeat: connection activity channel has been dropped. stopping.");
662 return Ok(());
663 }
664
665 if missed_heartbeats != 0 {
666 missed_heartbeats = 0;
667 let _ =this.update(cx, |this, cx| {
668 this.handle_heartbeat_result(missed_heartbeats, cx)
669 })?;
670 }
671 }
672 _ = keepalive_timer => {
673 log::debug!("Sending heartbeat to server...");
674
675 let result = select_biased! {
676 _ = connection_activity_rx.next().fuse() => {
677 Ok(())
678 }
679 ping_result = client.ping(HEARTBEAT_TIMEOUT).fuse() => {
680 ping_result
681 }
682 };
683
684 if result.is_err() {
685 missed_heartbeats += 1;
686 log::warn!(
687 "No heartbeat from server after {:?}. Missed heartbeat {} out of {}.",
688 HEARTBEAT_TIMEOUT,
689 missed_heartbeats,
690 MAX_MISSED_HEARTBEATS
691 );
692 } else if missed_heartbeats != 0 {
693 missed_heartbeats = 0;
694 } else {
695 continue;
696 }
697
698 let result = this.update(cx, |this, cx| {
699 this.handle_heartbeat_result(missed_heartbeats, cx)
700 })?;
701 if result.is_break() {
702 return Ok(());
703 }
704 }
705 }
706
707 keepalive_timer.set(cx.background_executor().timer(HEARTBEAT_INTERVAL).fuse());
708 }
709 })
710 }
711
712 fn handle_heartbeat_result(
713 &mut self,
714 missed_heartbeats: usize,
715 cx: &mut Context<Self>,
716 ) -> ControlFlow<()> {
717 let state = self.state.take().unwrap();
718 let next_state = if missed_heartbeats > 0 {
719 state.heartbeat_missed()
720 } else {
721 state.heartbeat_recovered()
722 };
723
724 self.set_state(next_state, cx);
725
726 if missed_heartbeats >= MAX_MISSED_HEARTBEATS {
727 log::error!(
728 "Missed last {} heartbeats. Reconnecting...",
729 missed_heartbeats
730 );
731
732 self.reconnect(cx)
733 .context("failed to start reconnect process after missing heartbeats")
734 .log_err();
735 ControlFlow::Break(())
736 } else {
737 ControlFlow::Continue(())
738 }
739 }
740
741 fn monitor(
742 this: WeakEntity<Self>,
743 io_task: Task<Result<i32>>,
744 cx: &AsyncApp,
745 ) -> Task<Result<()>> {
746 cx.spawn(async move |cx| {
747 let result = io_task.await;
748
749 match result {
750 Ok(exit_code) => {
751 if let Some(error) = ProxyLaunchError::from_exit_code(exit_code) {
752 match error {
753 ProxyLaunchError::ServerNotRunning => {
754 log::error!("failed to reconnect because server is not running");
755 this.update(cx, |this, cx| {
756 this.set_state(State::ServerNotRunning, cx);
757 })?;
758 }
759 }
760 } else if exit_code > 0 {
761 log::error!("proxy process terminated unexpectedly");
762 this.update(cx, |this, cx| {
763 this.reconnect(cx).ok();
764 })?;
765 }
766 }
767 Err(error) => {
768 log::warn!("ssh io task died with error: {:?}. reconnecting...", error);
769 this.update(cx, |this, cx| {
770 this.reconnect(cx).ok();
771 })?;
772 }
773 }
774
775 Ok(())
776 })
777 }
778
779 fn state_is(&self, check: impl FnOnce(&State) -> bool) -> bool {
780 self.state.as_ref().is_some_and(check)
781 }
782
783 fn try_set_state(&mut self, cx: &mut Context<Self>, map: impl FnOnce(&State) -> Option<State>) {
784 let new_state = self.state.as_ref().and_then(map);
785 if let Some(new_state) = new_state {
786 self.state.replace(new_state);
787 cx.notify();
788 }
789 }
790
791 fn set_state(&mut self, state: State, cx: &mut Context<Self>) {
792 log::info!("setting state to '{}'", &state);
793
794 let is_reconnect_exhausted = state.is_reconnect_exhausted();
795 let is_server_not_running = state.is_server_not_running();
796 self.state.replace(state);
797
798 if is_reconnect_exhausted || is_server_not_running {
799 cx.emit(RemoteClientEvent::Disconnected);
800 }
801 cx.notify();
802 }
803
804 pub fn shell(&self) -> Option<String> {
805 Some(self.remote_connection()?.shell())
806 }
807
808 pub fn default_system_shell(&self) -> Option<String> {
809 Some(self.remote_connection()?.default_system_shell())
810 }
811
812 pub fn shares_network_interface(&self) -> bool {
813 self.remote_connection()
814 .map_or(false, |connection| connection.shares_network_interface())
815 }
816
817 pub fn build_command(
818 &self,
819 program: Option<String>,
820 args: &[String],
821 env: &HashMap<String, String>,
822 working_dir: Option<String>,
823 port_forward: Option<(u16, String, u16)>,
824 ) -> Result<CommandTemplate> {
825 let Some(connection) = self.remote_connection() else {
826 return Err(anyhow!("no ssh connection"));
827 };
828 connection.build_command(program, args, env, working_dir, port_forward)
829 }
830
831 pub fn build_forward_ports_command(
832 &self,
833 forwards: Vec<(u16, String, u16)>,
834 ) -> Result<CommandTemplate> {
835 let Some(connection) = self.remote_connection() else {
836 return Err(anyhow!("no ssh connection"));
837 };
838 connection.build_forward_ports_command(forwards)
839 }
840
841 pub fn upload_directory(
842 &self,
843 src_path: PathBuf,
844 dest_path: RemotePathBuf,
845 cx: &App,
846 ) -> Task<Result<()>> {
847 let Some(connection) = self.remote_connection() else {
848 return Task::ready(Err(anyhow!("no ssh connection")));
849 };
850 connection.upload_directory(src_path, dest_path, cx)
851 }
852
853 pub fn proto_client(&self) -> AnyProtoClient {
854 self.client.clone().into()
855 }
856
857 pub fn connection_options(&self) -> RemoteConnectionOptions {
858 self.connection_options.clone()
859 }
860
861 pub fn connection(&self) -> Option<Arc<dyn RemoteConnection>> {
862 if let State::Connected {
863 remote_connection, ..
864 } = self.state.as_ref()?
865 {
866 Some(remote_connection.clone())
867 } else {
868 None
869 }
870 }
871
872 pub fn connection_state(&self) -> ConnectionState {
873 self.state
874 .as_ref()
875 .map(ConnectionState::from)
876 .unwrap_or(ConnectionState::Disconnected)
877 }
878
879 pub fn is_disconnected(&self) -> bool {
880 self.connection_state() == ConnectionState::Disconnected
881 }
882
883 pub const fn path_style(&self) -> PathStyle {
884 self.path_style
885 }
886
887 #[cfg(any(test, feature = "test-support"))]
888 pub fn simulate_disconnect(&self, client_cx: &mut App) -> Task<()> {
889 let opts = self.connection_options();
890 client_cx.spawn(async move |cx| {
891 let connection = cx
892 .update_global(|c: &mut ConnectionPool, _| {
893 if let Some(ConnectionPoolEntry::Connecting(c)) = c.connections.get(&opts) {
894 c.clone()
895 } else {
896 panic!("missing test connection")
897 }
898 })
899 .unwrap()
900 .await
901 .unwrap();
902
903 connection.simulate_disconnect(cx);
904 })
905 }
906
907 #[cfg(any(test, feature = "test-support"))]
908 pub fn fake_server(
909 client_cx: &mut gpui::TestAppContext,
910 server_cx: &mut gpui::TestAppContext,
911 ) -> (RemoteConnectionOptions, AnyProtoClient) {
912 let port = client_cx
913 .update(|cx| cx.default_global::<ConnectionPool>().connections.len() as u16 + 1);
914 let opts = RemoteConnectionOptions::Ssh(SshConnectionOptions {
915 host: "<fake>".to_string(),
916 port: Some(port),
917 ..Default::default()
918 });
919 let (outgoing_tx, _) = mpsc::unbounded::<Envelope>();
920 let (_, incoming_rx) = mpsc::unbounded::<Envelope>();
921 let server_client =
922 server_cx.update(|cx| ChannelClient::new(incoming_rx, outgoing_tx, cx, "fake-server"));
923 let connection: Arc<dyn RemoteConnection> = Arc::new(fake::FakeRemoteConnection {
924 connection_options: opts.clone(),
925 server_cx: fake::SendableCx::new(server_cx),
926 server_channel: server_client.clone(),
927 });
928
929 client_cx.update(|cx| {
930 cx.update_default_global(|c: &mut ConnectionPool, cx| {
931 c.connections.insert(
932 opts.clone(),
933 ConnectionPoolEntry::Connecting(
934 cx.background_spawn({
935 let connection = connection.clone();
936 async move { Ok(connection.clone()) }
937 })
938 .shared(),
939 ),
940 );
941 })
942 });
943
944 (opts, server_client.into())
945 }
946
947 #[cfg(any(test, feature = "test-support"))]
948 pub async fn fake_client(
949 opts: RemoteConnectionOptions,
950 client_cx: &mut gpui::TestAppContext,
951 ) -> Entity<Self> {
952 let (_tx, rx) = oneshot::channel();
953 let mut cx = client_cx.to_async();
954 let connection = connect(opts, Arc::new(fake::Delegate), &mut cx)
955 .await
956 .unwrap();
957 client_cx
958 .update(|cx| {
959 Self::new(
960 ConnectionIdentifier::setup(),
961 connection,
962 rx,
963 Arc::new(fake::Delegate),
964 cx,
965 )
966 })
967 .await
968 .unwrap()
969 .unwrap()
970 }
971
972 fn remote_connection(&self) -> Option<Arc<dyn RemoteConnection>> {
973 self.state
974 .as_ref()
975 .and_then(|state| state.remote_connection())
976 }
977}
978
979enum ConnectionPoolEntry {
980 Connecting(Shared<Task<Result<Arc<dyn RemoteConnection>, Arc<anyhow::Error>>>>),
981 Connected(Weak<dyn RemoteConnection>),
982}
983
984#[derive(Default)]
985struct ConnectionPool {
986 connections: HashMap<RemoteConnectionOptions, ConnectionPoolEntry>,
987}
988
989impl Global for ConnectionPool {}
990
991impl ConnectionPool {
992 pub fn connect(
993 &mut self,
994 opts: RemoteConnectionOptions,
995 delegate: Arc<dyn RemoteClientDelegate>,
996 cx: &mut App,
997 ) -> Shared<Task<Result<Arc<dyn RemoteConnection>, Arc<anyhow::Error>>>> {
998 let connection = self.connections.get(&opts);
999 match connection {
1000 Some(ConnectionPoolEntry::Connecting(task)) => {
1001 let delegate = delegate.clone();
1002 cx.spawn(async move |cx| {
1003 delegate.set_status(Some("Waiting for existing connection attempt"), cx);
1004 })
1005 .detach();
1006 return task.clone();
1007 }
1008 Some(ConnectionPoolEntry::Connected(ssh)) => {
1009 if let Some(ssh) = ssh.upgrade()
1010 && !ssh.has_been_killed()
1011 {
1012 return Task::ready(Ok(ssh)).shared();
1013 }
1014 self.connections.remove(&opts);
1015 }
1016 None => {}
1017 }
1018
1019 let task = cx
1020 .spawn({
1021 let opts = opts.clone();
1022 let delegate = delegate.clone();
1023 async move |cx| {
1024 let connection = match opts.clone() {
1025 RemoteConnectionOptions::Ssh(opts) => {
1026 SshRemoteConnection::new(opts, delegate, cx)
1027 .await
1028 .map(|connection| Arc::new(connection) as Arc<dyn RemoteConnection>)
1029 }
1030 RemoteConnectionOptions::Wsl(opts) => {
1031 WslRemoteConnection::new(opts, delegate, cx)
1032 .await
1033 .map(|connection| Arc::new(connection) as Arc<dyn RemoteConnection>)
1034 }
1035 };
1036
1037 cx.update_global(|pool: &mut Self, _| {
1038 debug_assert!(matches!(
1039 pool.connections.get(&opts),
1040 Some(ConnectionPoolEntry::Connecting(_))
1041 ));
1042 match connection {
1043 Ok(connection) => {
1044 pool.connections.insert(
1045 opts.clone(),
1046 ConnectionPoolEntry::Connected(Arc::downgrade(&connection)),
1047 );
1048 Ok(connection)
1049 }
1050 Err(error) => {
1051 pool.connections.remove(&opts);
1052 Err(Arc::new(error))
1053 }
1054 }
1055 })?
1056 }
1057 })
1058 .shared();
1059
1060 self.connections
1061 .insert(opts.clone(), ConnectionPoolEntry::Connecting(task.clone()));
1062 task
1063 }
1064}
1065
1066#[derive(Debug, Clone, PartialEq, Eq, Hash)]
1067pub enum RemoteConnectionOptions {
1068 Ssh(SshConnectionOptions),
1069 Wsl(WslConnectionOptions),
1070}
1071
1072impl RemoteConnectionOptions {
1073 pub fn display_name(&self) -> String {
1074 match self {
1075 RemoteConnectionOptions::Ssh(opts) => opts.host.clone(),
1076 RemoteConnectionOptions::Wsl(opts) => opts.distro_name.clone(),
1077 }
1078 }
1079}
1080
1081impl From<SshConnectionOptions> for RemoteConnectionOptions {
1082 fn from(opts: SshConnectionOptions) -> Self {
1083 RemoteConnectionOptions::Ssh(opts)
1084 }
1085}
1086
1087impl From<WslConnectionOptions> for RemoteConnectionOptions {
1088 fn from(opts: WslConnectionOptions) -> Self {
1089 RemoteConnectionOptions::Wsl(opts)
1090 }
1091}
1092
1093#[async_trait(?Send)]
1094pub trait RemoteConnection: Send + Sync {
1095 fn start_proxy(
1096 &self,
1097 unique_identifier: String,
1098 reconnect: bool,
1099 incoming_tx: UnboundedSender<Envelope>,
1100 outgoing_rx: UnboundedReceiver<Envelope>,
1101 connection_activity_tx: Sender<()>,
1102 delegate: Arc<dyn RemoteClientDelegate>,
1103 cx: &mut AsyncApp,
1104 ) -> Task<Result<i32>>;
1105 fn upload_directory(
1106 &self,
1107 src_path: PathBuf,
1108 dest_path: RemotePathBuf,
1109 cx: &App,
1110 ) -> Task<Result<()>>;
1111 async fn kill(&self) -> Result<()>;
1112 fn has_been_killed(&self) -> bool;
1113 fn shares_network_interface(&self) -> bool {
1114 false
1115 }
1116 fn build_command(
1117 &self,
1118 program: Option<String>,
1119 args: &[String],
1120 env: &HashMap<String, String>,
1121 working_dir: Option<String>,
1122 port_forward: Option<(u16, String, u16)>,
1123 ) -> Result<CommandTemplate>;
1124 fn build_forward_ports_command(
1125 &self,
1126 forwards: Vec<(u16, String, u16)>,
1127 ) -> Result<CommandTemplate>;
1128 fn connection_options(&self) -> RemoteConnectionOptions;
1129 fn path_style(&self) -> PathStyle;
1130 fn shell(&self) -> String;
1131 fn default_system_shell(&self) -> String;
1132
1133 #[cfg(any(test, feature = "test-support"))]
1134 fn simulate_disconnect(&self, _: &AsyncApp) {}
1135}
1136
1137type ResponseChannels = Mutex<HashMap<MessageId, oneshot::Sender<(Envelope, oneshot::Sender<()>)>>>;
1138
1139struct Signal<T> {
1140 tx: Mutex<Option<oneshot::Sender<T>>>,
1141 rx: Shared<Task<Option<T>>>,
1142}
1143
1144impl<T: Send + Clone + 'static> Signal<T> {
1145 pub fn new(cx: &App) -> Self {
1146 let (tx, rx) = oneshot::channel();
1147
1148 let task = cx
1149 .background_executor()
1150 .spawn(async move { rx.await.ok() })
1151 .shared();
1152
1153 Self {
1154 tx: Mutex::new(Some(tx)),
1155 rx: task,
1156 }
1157 }
1158
1159 fn set(&self, value: T) {
1160 if let Some(tx) = self.tx.lock().take() {
1161 let _ = tx.send(value);
1162 }
1163 }
1164
1165 fn wait(&self) -> Shared<Task<Option<T>>> {
1166 self.rx.clone()
1167 }
1168}
1169
1170struct ChannelClient {
1171 next_message_id: AtomicU32,
1172 outgoing_tx: Mutex<mpsc::UnboundedSender<Envelope>>,
1173 buffer: Mutex<VecDeque<Envelope>>,
1174 response_channels: ResponseChannels,
1175 message_handlers: Mutex<ProtoMessageHandlerSet>,
1176 max_received: AtomicU32,
1177 name: &'static str,
1178 task: Mutex<Task<Result<()>>>,
1179 remote_started: Signal<()>,
1180}
1181
1182impl ChannelClient {
1183 fn new(
1184 incoming_rx: mpsc::UnboundedReceiver<Envelope>,
1185 outgoing_tx: mpsc::UnboundedSender<Envelope>,
1186 cx: &App,
1187 name: &'static str,
1188 ) -> Arc<Self> {
1189 Arc::new_cyclic(|this| Self {
1190 outgoing_tx: Mutex::new(outgoing_tx),
1191 next_message_id: AtomicU32::new(0),
1192 max_received: AtomicU32::new(0),
1193 response_channels: ResponseChannels::default(),
1194 message_handlers: Default::default(),
1195 buffer: Mutex::new(VecDeque::new()),
1196 name,
1197 task: Mutex::new(Self::start_handling_messages(
1198 this.clone(),
1199 incoming_rx,
1200 &cx.to_async(),
1201 )),
1202 remote_started: Signal::new(cx),
1203 })
1204 }
1205
1206 fn wait_for_remote_started(&self) -> Shared<Task<Option<()>>> {
1207 self.remote_started.wait()
1208 }
1209
1210 fn start_handling_messages(
1211 this: Weak<Self>,
1212 mut incoming_rx: mpsc::UnboundedReceiver<Envelope>,
1213 cx: &AsyncApp,
1214 ) -> Task<Result<()>> {
1215 cx.spawn(async move |cx| {
1216 if let Some(this) = this.upgrade() {
1217 let envelope = proto::RemoteStarted {}.into_envelope(0, None, None);
1218 this.outgoing_tx.lock().unbounded_send(envelope).ok();
1219 };
1220
1221 let peer_id = PeerId { owner_id: 0, id: 0 };
1222 while let Some(incoming) = incoming_rx.next().await {
1223 let Some(this) = this.upgrade() else {
1224 return anyhow::Ok(());
1225 };
1226 if let Some(ack_id) = incoming.ack_id {
1227 let mut buffer = this.buffer.lock();
1228 while buffer.front().is_some_and(|msg| msg.id <= ack_id) {
1229 buffer.pop_front();
1230 }
1231 }
1232 if let Some(proto::envelope::Payload::FlushBufferedMessages(_)) = &incoming.payload
1233 {
1234 log::debug!(
1235 "{}:ssh message received. name:FlushBufferedMessages",
1236 this.name
1237 );
1238 {
1239 let buffer = this.buffer.lock();
1240 for envelope in buffer.iter() {
1241 this.outgoing_tx
1242 .lock()
1243 .unbounded_send(envelope.clone())
1244 .ok();
1245 }
1246 }
1247 let mut envelope = proto::Ack {}.into_envelope(0, Some(incoming.id), None);
1248 envelope.id = this.next_message_id.fetch_add(1, SeqCst);
1249 this.outgoing_tx.lock().unbounded_send(envelope).ok();
1250 continue;
1251 }
1252
1253 if let Some(proto::envelope::Payload::RemoteStarted(_)) = &incoming.payload {
1254 this.remote_started.set(());
1255 let mut envelope = proto::Ack {}.into_envelope(0, Some(incoming.id), None);
1256 envelope.id = this.next_message_id.fetch_add(1, SeqCst);
1257 this.outgoing_tx.lock().unbounded_send(envelope).ok();
1258 continue;
1259 }
1260
1261 this.max_received.store(incoming.id, SeqCst);
1262
1263 if let Some(request_id) = incoming.responding_to {
1264 let request_id = MessageId(request_id);
1265 let sender = this.response_channels.lock().remove(&request_id);
1266 if let Some(sender) = sender {
1267 let (tx, rx) = oneshot::channel();
1268 if incoming.payload.is_some() {
1269 sender.send((incoming, tx)).ok();
1270 }
1271 rx.await.ok();
1272 }
1273 } else if let Some(envelope) =
1274 build_typed_envelope(peer_id, Instant::now(), incoming)
1275 {
1276 let type_name = envelope.payload_type_name();
1277 let message_id = envelope.message_id();
1278 if let Some(future) = ProtoMessageHandlerSet::handle_message(
1279 &this.message_handlers,
1280 envelope,
1281 this.clone().into(),
1282 cx.clone(),
1283 ) {
1284 log::debug!("{}:ssh message received. name:{type_name}", this.name);
1285 cx.foreground_executor()
1286 .spawn(async move {
1287 match future.await {
1288 Ok(_) => {
1289 log::debug!(
1290 "{}:ssh message handled. name:{type_name}",
1291 this.name
1292 );
1293 }
1294 Err(error) => {
1295 log::error!(
1296 "{}:error handling message. type:{}, error:{:#}",
1297 this.name,
1298 type_name,
1299 format!("{error:#}").lines().fold(
1300 String::new(),
1301 |mut message, line| {
1302 if !message.is_empty() {
1303 message.push(' ');
1304 }
1305 message.push_str(line);
1306 message
1307 }
1308 )
1309 );
1310 }
1311 }
1312 })
1313 .detach()
1314 } else {
1315 log::error!("{}:unhandled ssh message name:{type_name}", this.name);
1316 if let Err(e) = AnyProtoClient::from(this.clone()).send_response(
1317 message_id,
1318 anyhow::anyhow!("no handler registered for {type_name}").to_proto(),
1319 ) {
1320 log::error!(
1321 "{}:error sending error response for {type_name}:{e:#}",
1322 this.name
1323 );
1324 }
1325 }
1326 }
1327 }
1328 anyhow::Ok(())
1329 })
1330 }
1331
1332 fn reconnect(
1333 self: &Arc<Self>,
1334 incoming_rx: UnboundedReceiver<Envelope>,
1335 outgoing_tx: UnboundedSender<Envelope>,
1336 cx: &AsyncApp,
1337 ) {
1338 *self.outgoing_tx.lock() = outgoing_tx;
1339 *self.task.lock() = Self::start_handling_messages(Arc::downgrade(self), incoming_rx, cx);
1340 }
1341
1342 fn request<T: RequestMessage>(
1343 &self,
1344 payload: T,
1345 ) -> impl 'static + Future<Output = Result<T::Response>> {
1346 self.request_internal(payload, true)
1347 }
1348
1349 fn request_internal<T: RequestMessage>(
1350 &self,
1351 payload: T,
1352 use_buffer: bool,
1353 ) -> impl 'static + Future<Output = Result<T::Response>> {
1354 log::debug!("ssh request start. name:{}", T::NAME);
1355 let response =
1356 self.request_dynamic(payload.into_envelope(0, None, None), T::NAME, use_buffer);
1357 async move {
1358 let response = response.await?;
1359 log::debug!("ssh request finish. name:{}", T::NAME);
1360 T::Response::from_envelope(response).context("received a response of the wrong type")
1361 }
1362 }
1363
1364 async fn resync(&self, timeout: Duration) -> Result<()> {
1365 smol::future::or(
1366 async {
1367 self.request_internal(proto::FlushBufferedMessages {}, false)
1368 .await?;
1369
1370 for envelope in self.buffer.lock().iter() {
1371 self.outgoing_tx
1372 .lock()
1373 .unbounded_send(envelope.clone())
1374 .ok();
1375 }
1376 Ok(())
1377 },
1378 async {
1379 smol::Timer::after(timeout).await;
1380 anyhow::bail!("Timed out resyncing remote client")
1381 },
1382 )
1383 .await
1384 }
1385
1386 async fn ping(&self, timeout: Duration) -> Result<()> {
1387 smol::future::or(
1388 async {
1389 self.request(proto::Ping {}).await?;
1390 Ok(())
1391 },
1392 async {
1393 smol::Timer::after(timeout).await;
1394 anyhow::bail!("Timed out pinging remote client")
1395 },
1396 )
1397 .await
1398 }
1399
1400 fn send<T: EnvelopedMessage>(&self, payload: T) -> Result<()> {
1401 log::debug!("ssh send name:{}", T::NAME);
1402 self.send_dynamic(payload.into_envelope(0, None, None))
1403 }
1404
1405 fn request_dynamic(
1406 &self,
1407 mut envelope: proto::Envelope,
1408 type_name: &'static str,
1409 use_buffer: bool,
1410 ) -> impl 'static + Future<Output = Result<proto::Envelope>> {
1411 envelope.id = self.next_message_id.fetch_add(1, SeqCst);
1412 let (tx, rx) = oneshot::channel();
1413 let mut response_channels_lock = self.response_channels.lock();
1414 response_channels_lock.insert(MessageId(envelope.id), tx);
1415 drop(response_channels_lock);
1416
1417 let result = if use_buffer {
1418 self.send_buffered(envelope)
1419 } else {
1420 self.send_unbuffered(envelope)
1421 };
1422 async move {
1423 if let Err(error) = &result {
1424 log::error!("failed to send message: {error}");
1425 anyhow::bail!("failed to send message: {error}");
1426 }
1427
1428 let response = rx.await.context("connection lost")?.0;
1429 if let Some(proto::envelope::Payload::Error(error)) = &response.payload {
1430 return Err(RpcError::from_proto(error, type_name));
1431 }
1432 Ok(response)
1433 }
1434 }
1435
1436 pub fn send_dynamic(&self, mut envelope: proto::Envelope) -> Result<()> {
1437 envelope.id = self.next_message_id.fetch_add(1, SeqCst);
1438 self.send_buffered(envelope)
1439 }
1440
1441 fn send_buffered(&self, mut envelope: proto::Envelope) -> Result<()> {
1442 envelope.ack_id = Some(self.max_received.load(SeqCst));
1443 self.buffer.lock().push_back(envelope.clone());
1444 // ignore errors on send (happen while we're reconnecting)
1445 // assume that the global "disconnected" overlay is sufficient.
1446 self.outgoing_tx.lock().unbounded_send(envelope).ok();
1447 Ok(())
1448 }
1449
1450 fn send_unbuffered(&self, mut envelope: proto::Envelope) -> Result<()> {
1451 envelope.ack_id = Some(self.max_received.load(SeqCst));
1452 self.outgoing_tx.lock().unbounded_send(envelope).ok();
1453 Ok(())
1454 }
1455}
1456
1457impl ProtoClient for ChannelClient {
1458 fn request(
1459 &self,
1460 envelope: proto::Envelope,
1461 request_type: &'static str,
1462 ) -> BoxFuture<'static, Result<proto::Envelope>> {
1463 self.request_dynamic(envelope, request_type, true).boxed()
1464 }
1465
1466 fn send(&self, envelope: proto::Envelope, _message_type: &'static str) -> Result<()> {
1467 self.send_dynamic(envelope)
1468 }
1469
1470 fn send_response(&self, envelope: Envelope, _message_type: &'static str) -> anyhow::Result<()> {
1471 self.send_dynamic(envelope)
1472 }
1473
1474 fn message_handler_set(&self) -> &Mutex<ProtoMessageHandlerSet> {
1475 &self.message_handlers
1476 }
1477
1478 fn is_via_collab(&self) -> bool {
1479 false
1480 }
1481}
1482
1483#[cfg(any(test, feature = "test-support"))]
1484mod fake {
1485 use super::{ChannelClient, RemoteClientDelegate, RemoteConnection, RemotePlatform};
1486 use crate::remote_client::{CommandTemplate, RemoteConnectionOptions};
1487 use anyhow::Result;
1488 use askpass::EncryptedPassword;
1489 use async_trait::async_trait;
1490 use collections::HashMap;
1491 use futures::{
1492 FutureExt, SinkExt, StreamExt,
1493 channel::{
1494 mpsc::{self, Sender},
1495 oneshot,
1496 },
1497 select_biased,
1498 };
1499 use gpui::{App, AppContext as _, AsyncApp, SemanticVersion, Task, TestAppContext};
1500 use release_channel::ReleaseChannel;
1501 use rpc::proto::Envelope;
1502 use std::{path::PathBuf, sync::Arc};
1503 use util::paths::{PathStyle, RemotePathBuf};
1504
1505 pub(super) struct FakeRemoteConnection {
1506 pub(super) connection_options: RemoteConnectionOptions,
1507 pub(super) server_channel: Arc<ChannelClient>,
1508 pub(super) server_cx: SendableCx,
1509 }
1510
1511 pub(super) struct SendableCx(AsyncApp);
1512 impl SendableCx {
1513 // SAFETY: When run in test mode, GPUI is always single threaded.
1514 pub(super) fn new(cx: &TestAppContext) -> Self {
1515 Self(cx.to_async())
1516 }
1517
1518 // SAFETY: Enforce that we're on the main thread by requiring a valid AsyncApp
1519 fn get(&self, _: &AsyncApp) -> AsyncApp {
1520 self.0.clone()
1521 }
1522 }
1523
1524 // SAFETY: There is no way to access a SendableCx from a different thread, see [`SendableCx::new`] and [`SendableCx::get`]
1525 unsafe impl Send for SendableCx {}
1526 unsafe impl Sync for SendableCx {}
1527
1528 #[async_trait(?Send)]
1529 impl RemoteConnection for FakeRemoteConnection {
1530 async fn kill(&self) -> Result<()> {
1531 Ok(())
1532 }
1533
1534 fn has_been_killed(&self) -> bool {
1535 false
1536 }
1537
1538 fn build_command(
1539 &self,
1540 program: Option<String>,
1541 args: &[String],
1542 env: &HashMap<String, String>,
1543 _: Option<String>,
1544 _: Option<(u16, String, u16)>,
1545 ) -> Result<CommandTemplate> {
1546 let ssh_program = program.unwrap_or_else(|| "sh".to_string());
1547 let mut ssh_args = Vec::new();
1548 ssh_args.push(ssh_program);
1549 ssh_args.extend(args.iter().cloned());
1550 Ok(CommandTemplate {
1551 program: "ssh".into(),
1552 args: ssh_args,
1553 env: env.clone(),
1554 })
1555 }
1556
1557 fn build_forward_ports_command(
1558 &self,
1559 forwards: Vec<(u16, String, u16)>,
1560 ) -> anyhow::Result<CommandTemplate> {
1561 Ok(CommandTemplate {
1562 program: "ssh".into(),
1563 args: std::iter::once("-N".to_owned())
1564 .chain(forwards.into_iter().map(|(local_port, host, remote_port)| {
1565 format!("{local_port}:{host}:{remote_port}")
1566 }))
1567 .collect(),
1568 env: Default::default(),
1569 })
1570 }
1571
1572 fn upload_directory(
1573 &self,
1574 _src_path: PathBuf,
1575 _dest_path: RemotePathBuf,
1576 _cx: &App,
1577 ) -> Task<Result<()>> {
1578 unreachable!()
1579 }
1580
1581 fn connection_options(&self) -> RemoteConnectionOptions {
1582 self.connection_options.clone()
1583 }
1584
1585 fn simulate_disconnect(&self, cx: &AsyncApp) {
1586 let (outgoing_tx, _) = mpsc::unbounded::<Envelope>();
1587 let (_, incoming_rx) = mpsc::unbounded::<Envelope>();
1588 self.server_channel
1589 .reconnect(incoming_rx, outgoing_tx, &self.server_cx.get(cx));
1590 }
1591
1592 fn start_proxy(
1593 &self,
1594 _unique_identifier: String,
1595 _reconnect: bool,
1596 mut client_incoming_tx: mpsc::UnboundedSender<Envelope>,
1597 mut client_outgoing_rx: mpsc::UnboundedReceiver<Envelope>,
1598 mut connection_activity_tx: Sender<()>,
1599 _delegate: Arc<dyn RemoteClientDelegate>,
1600 cx: &mut AsyncApp,
1601 ) -> Task<Result<i32>> {
1602 let (mut server_incoming_tx, server_incoming_rx) = mpsc::unbounded::<Envelope>();
1603 let (server_outgoing_tx, mut server_outgoing_rx) = mpsc::unbounded::<Envelope>();
1604
1605 self.server_channel.reconnect(
1606 server_incoming_rx,
1607 server_outgoing_tx,
1608 &self.server_cx.get(cx),
1609 );
1610
1611 cx.background_spawn(async move {
1612 loop {
1613 select_biased! {
1614 server_to_client = server_outgoing_rx.next().fuse() => {
1615 let Some(server_to_client) = server_to_client else {
1616 return Ok(1)
1617 };
1618 connection_activity_tx.try_send(()).ok();
1619 client_incoming_tx.send(server_to_client).await.ok();
1620 }
1621 client_to_server = client_outgoing_rx.next().fuse() => {
1622 let Some(client_to_server) = client_to_server else {
1623 return Ok(1)
1624 };
1625 server_incoming_tx.send(client_to_server).await.ok();
1626 }
1627 }
1628 }
1629 })
1630 }
1631
1632 fn path_style(&self) -> PathStyle {
1633 PathStyle::local()
1634 }
1635
1636 fn shell(&self) -> String {
1637 "sh".to_owned()
1638 }
1639
1640 fn default_system_shell(&self) -> String {
1641 "sh".to_owned()
1642 }
1643 }
1644
1645 pub(super) struct Delegate;
1646
1647 impl RemoteClientDelegate for Delegate {
1648 fn ask_password(&self, _: String, _: oneshot::Sender<EncryptedPassword>, _: &mut AsyncApp) {
1649 unreachable!()
1650 }
1651
1652 fn download_server_binary_locally(
1653 &self,
1654 _: RemotePlatform,
1655 _: ReleaseChannel,
1656 _: Option<SemanticVersion>,
1657 _: &mut AsyncApp,
1658 ) -> Task<Result<PathBuf>> {
1659 unreachable!()
1660 }
1661
1662 fn get_download_params(
1663 &self,
1664 _platform: RemotePlatform,
1665 _release_channel: ReleaseChannel,
1666 _version: Option<SemanticVersion>,
1667 _cx: &mut AsyncApp,
1668 ) -> Task<Result<Option<(String, String)>>> {
1669 unreachable!()
1670 }
1671
1672 fn set_status(&self, _: Option<&str>, _: &mut AsyncApp) {}
1673 }
1674}