Add api to get all tunnels from the tunnel service

src/vs/platform/remote/common/tunnel.ts

@@ -18,6 +18,8 @@ export interface RemoteTunnel {
 export interface ITunnelService {
 	_serviceBrand: undefined;
 
+	readonly tunnels: Promise<Iterable<RemoteTunnel>>;
+
 	openTunnel(remotePort: number): Promise<RemoteTunnel> | undefined;
 }
 

src/vs/platform/remote/common/tunnelService.ts

@@ -8,6 +8,8 @@ import { ITunnelService, RemoteTunnel } from 'vs/platform/remote/common/tunnel';
 export class NoOpTunnelService implements ITunnelService {
 	_serviceBrand: undefined;
 
+	public readonly tunnels: Promise<Iterable<RemoteTunnel>> = Promise.resolve([]);
+
 	openTunnel(_remotePort: number): Promise<RemoteTunnel> | undefined {
 		return undefined;
 	}

src/vs/workbench/services/remote/node/tunnelService.ts

@@ -97,6 +97,10 @@ export class TunnelService implements ITunnelService {
 		@ILogService private readonly logService: ILogService,
 	) { }
 
+	public get tunnels(): Promise<Iterable<RemoteTunnel>> {
+		return Promise.all(Array.from(this._tunnels.values()).map(x => x.value));
+	}
+
 	dispose(): void {
 		for (const { value } of this._tunnels.values()) {
 			value.then(tunnel => tunnel.dispose());