ConsoleImplTeleporter.cpp@ 24895

Last change on this file since 24895 was 24895, checked in by vboxsync, 15 years ago
SSM: Flush buffers when they are 0.5 sec old and check that the stream is ok (hasn't been cancelled). Check for out of disk space before each write.
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
File size: 41.1 KB

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1	/* $Id: ConsoleImplTeleporter.cpp 24895 2009-11-24 12:30:13Z vboxsync $ */
2	/** @file
3	* VBox Console COM Class implementation, The Teleporter Part.
4	*/
5
6	/*
7	* Copyright (C) 2009 Sun Microsystems, Inc.
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	*
17	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
18	* Clara, CA 95054 USA or visit http://www.sun.com if you need
19	* additional information or have any questions.
20	*/
21
22
23	/*******************************************************************************
24	* Header Files *
25	*******************************************************************************/
26	#include "ConsoleImpl.h"
27	#include "Global.h"
28	#include "Logging.h"
29	#include "ProgressImpl.h"
30
31	#include <iprt/err.h>
32	#include <iprt/rand.h>
33	#include <iprt/tcp.h>
34	#include <iprt/timer.h>
35
36	#include <VBox/vmapi.h>
37	#include <VBox/ssm.h>
38	#include <VBox/err.h>
39	#include <VBox/version.h>
40	#include <VBox/com/string.h>
41
42
43	/*******************************************************************************
44	* Structures and Typedefs *
45	*******************************************************************************/
46	/**
47	* Base class for the teleporter state.
48	*
49	* These classes are used as advanced structs, not as proper classes.
50	*/
51	class TeleporterState
52	{
53	public:
54	ComPtr<Console> mptrConsole;
55	PVM mpVM;
56	ComObjPtr<Progress> mptrProgress;
57	Utf8Str mstrPassword;
58	bool const mfIsSource;
59
60	/** @name stream stuff
61	* @{ */
62	RTSOCKET mhSocket;
63	uint64_t moffStream;
64	uint32_t mcbReadBlock;
65	bool volatile mfStopReading;
66	bool volatile mfEndOfStream;
67	bool volatile mfIOError;
68	/** @} */
69
70	TeleporterState(Console pConsole, PVM pVM, Progress pProgress, bool fIsSource)
71	: mptrConsole(pConsole)
72	, mpVM(pVM)
73	, mptrProgress(pProgress)
74	, mfIsSource(fIsSource)
75	, mhSocket(NIL_RTSOCKET)
76	, moffStream(UINT64_MAX / 2)
77	, mcbReadBlock(0)
78	, mfStopReading(false)
79	, mfEndOfStream(false)
80	, mfIOError(false)
81	{
82	}
83	};
84
85
86	/**
87	* Teleporter state used by the source side.
88	*/
89	class TeleporterStateSrc : public TeleporterState
90	{
91	public:
92	Utf8Str mstrHostname;
93	uint32_t muPort;
94	uint32_t mcMsMaxDowntime;
95	MachineState_T menmOldMachineState;
96	bool mfSuspendedByUs;
97	bool mfUnlockedMedia;
98
99	TeleporterStateSrc(Console pConsole, PVM pVM, Progress pProgress, MachineState_T enmOldMachineState)
100	: TeleporterState(pConsole, pVM, pProgress, true /fIsSource/)
101	, muPort(UINT32_MAX)
102	, mcMsMaxDowntime(250)
103	, menmOldMachineState(enmOldMachineState)
104	, mfSuspendedByUs(false)
105	, mfUnlockedMedia(false)
106	{
107	}
108	};
109
110
111	/**
112	* Teleporter state used by the destiation side.
113	*/
114	class TeleporterStateTrg : public TeleporterState
115	{
116	public:
117	IMachine *mpMachine;
118	IInternalMachineControl *mpControl;
119	PRTTCPSERVER mhServer;
120	PRTTIMERLR mphTimerLR;
121	bool mfLockedMedia;
122	int mRc;
123
124	TeleporterStateTrg(Console pConsole, PVM pVM, Progress pProgress,
125	IMachine pMachine, IInternalMachineControl pControl,
126	PRTTIMERLR phTimerLR, bool fStartPaused)
127	: TeleporterState(pConsole, pVM, pProgress, false /fIsSource/)
128	, mpMachine(pMachine)
129	, mpControl(pControl)
130	, mhServer(NULL)
131	, mphTimerLR(phTimerLR)
132	, mfLockedMedia(false)
133	, mRc(VINF_SUCCESS)
134	{
135	}
136	};
137
138
139	/**
140	* TCP stream header.
141	*
142	* This is an extra layer for fixing the problem with figuring out when the SSM
143	* stream ends.
144	*/
145	typedef struct TELEPORTERTCPHDR
146	{
147	/** Magic value. */
148	uint32_t u32Magic;
149	/** The size of the data block following this header.
150	* 0 indicates the end of the stream. */
151	uint32_t cb;
152	} TELEPORTERTCPHDR;
153	/** Magic value for TELEPORTERTCPHDR::u32Magic. (Egberto Gismonti Amin) */
154	#define TELEPORTERTCPHDR_MAGIC UINT32_C(0x19471205)
155	/** The max block size. */
156	#define TELEPORTERTCPHDR_MAX_SIZE UINT32_C(0x00fffff8)
157
158
159	/*******************************************************************************
160	* Global Variables *
161	*******************************************************************************/
162	static const char g_szWelcome[] = "VirtualBox-Teleporter-1.0\n";
163
164
165	/**
166	* Reads a string from the socket.
167	*
168	* @returns VBox status code.
169	*
170	* @param pState The teleporter state structure.
171	* @param pszBuf The output buffer.
172	* @param cchBuf The size of the output buffer.
173	*
174	*/
175	static int teleporterTcpReadLine(TeleporterState pState, char pszBuf, size_t cchBuf)
176	{
177	char *pszStart = pszBuf;
178	RTSOCKET Sock = pState->mhSocket;
179
180	AssertReturn(cchBuf > 1, VERR_INTERNAL_ERROR);
181	*pszBuf = '\0';
182
183	/* dead simple approach. */
184	for (;;)
185	{
186	char ch;
187	int rc = RTTcpRead(Sock, &ch, sizeof(ch), NULL);
188	if (RT_FAILURE(rc))
189	{
190	LogRel(("Teleporter: RTTcpRead -> %Rrc while reading string ('%s')\n", rc, pszStart));
191	return rc;
192	}
193	if ( ch == '\n'
194	\|\| ch == '\0')
195	return VINF_SUCCESS;
196	if (cchBuf <= 1)
197	{
198	LogRel(("Teleporter: String buffer overflow: '%s'\n", pszStart));
199	return VERR_BUFFER_OVERFLOW;
200	}
201	*pszBuf++ = ch;
202	*pszBuf = '\0';
203	cchBuf--;
204	}
205	}
206
207
208	/**
209	* Reads an ACK or NACK.
210	*
211	* @returns S_OK on ACK, E_FAIL+setError() on failure or NACK.
212	* @param pState The teleporter source state.
213	* @param pszWhich Which ACK is this this?
214	* @param pszNAckMsg Optional NACK message.
215	*
216	* @remarks the setError laziness forces this to be a Console member.
217	*/
218	HRESULT
219	Console::teleporterSrcReadACK(TeleporterStateSrc pState, const char pszWhich,
220	const char pszNAckMsg /= NULL*/)
221	{
222	char szMsg[128];
223	int vrc = teleporterTcpReadLine(pState, szMsg, sizeof(szMsg));
224	if (RT_FAILURE(vrc))
225	return setError(E_FAIL, tr("Failed reading ACK(%s): %Rrc"), pszWhich, vrc);
226	if (strcmp(szMsg, "ACK"))
227	{
228	if (!strncmp(szMsg, "NACK=", sizeof("NACK=") - 1))
229	{
230	int32_t vrc2;
231	vrc = RTStrToInt32Full(&szMsg[sizeof("NACK=") - 1], 10, &vrc2);
232	if (vrc == VINF_SUCCESS)
233	{
234	if (pszNAckMsg)
235	{
236	LogRel(("Teleporter: %s: NACK=%Rrc (%d)\n", pszWhich, vrc2, vrc2));
237	return setError(E_FAIL, pszNAckMsg);
238	}
239	return setError(E_FAIL, "NACK(%s) - %Rrc (%d)", pszWhich, vrc2, vrc2);
240	}
241	}
242	return setError(E_FAIL, tr("%s: Expected ACK or NACK, got '%s'"), pszWhich, szMsg);
243	}
244	return S_OK;
245	}
246
247
248	/**
249	* Submitts a command to the destination and waits for the ACK.
250	*
251	* @returns S_OK on ACKed command, E_FAIL+setError() on failure.
252	*
253	* @param pState The teleporter source state.
254	* @param pszCommand The command.
255	* @param fWaitForAck Whether to wait for the ACK.
256	*
257	* @remarks the setError laziness forces this to be a Console member.
258	*/
259	HRESULT
260	Console::teleporterSrcSubmitCommand(TeleporterStateSrc pState, const char pszCommand, bool fWaitForAck /= true/)
261	{
262	size_t cchCommand = strlen(pszCommand);
263	int vrc = RTTcpWrite(pState->mhSocket, pszCommand, cchCommand);
264	if (RT_SUCCESS(vrc))
265	vrc = RTTcpWrite(pState->mhSocket, "\n", sizeof("\n") - 1);
266	if (RT_SUCCESS(vrc))
267	vrc = RTTcpFlush(pState->mhSocket);
268	if (RT_FAILURE(vrc))
269	return setError(E_FAIL, tr("Failed writing command '%s': %Rrc"), pszCommand, vrc);
270	if (!fWaitForAck)
271	return S_OK;
272	return teleporterSrcReadACK(pState, pszCommand);
273	}
274
275
276	/**
277	* @copydoc SSMSTRMOPS::pfnWrite
278	*/
279	static DECLCALLBACK(int) teleporterTcpOpWrite(void pvUser, uint64_t offStream, const void pvBuf, size_t cbToWrite)
280	{
281	TeleporterState pState = (TeleporterState )pvUser;
282
283	AssertReturn(cbToWrite > 0, VINF_SUCCESS);
284	AssertReturn(cbToWrite < UINT32_MAX, VERR_OUT_OF_RANGE);
285	AssertReturn(pState->mfIsSource, VERR_INVALID_HANDLE);
286
287	for (;;)
288	{
289	/* Write block header. */
290	TELEPORTERTCPHDR Hdr;
291	Hdr.u32Magic = TELEPORTERTCPHDR_MAGIC;
292	Hdr.cb = RT_MIN((uint32_t)cbToWrite, TELEPORTERTCPHDR_MAX_SIZE);
293	int rc = RTTcpWrite(pState->mhSocket, &Hdr, sizeof(Hdr));
294	if (RT_FAILURE(rc))
295	{
296	LogRel(("Teleporter/TCP: Header write error: %Rrc\n", rc));
297	return rc;
298	}
299
300	/* Write the data. */
301	rc = RTTcpWrite(pState->mhSocket, pvBuf, Hdr.cb);
302	if (RT_FAILURE(rc))
303	{
304	LogRel(("Teleporter/TCP: Data write error: %Rrc (cb=%#x)\n", rc, Hdr.cb));
305	return rc;
306	}
307	pState->moffStream += Hdr.cb;
308	if (Hdr.cb == cbToWrite)
309	return VINF_SUCCESS;
310
311	/* advance */
312	cbToWrite -= Hdr.cb;
313	pvBuf = (uint8_t const *)pvBuf + Hdr.cb;
314	}
315	}
316
317
318	/**
319	* Selects and poll for close condition.
320	*
321	* We can use a relatively high poll timeout here since it's only used to get
322	* us out of error paths. In the normal cause of events, we'll get a
323	* end-of-stream header.
324	*
325	* @returns VBox status code.
326	*
327	* @param pState The teleporter state data.
328	*/
329	static int teleporterTcpReadSelect(TeleporterState *pState)
330	{
331	int rc;
332	do
333	{
334	rc = RTTcpSelectOne(pState->mhSocket, 1000);
335	if (RT_FAILURE(rc) && rc != VERR_TIMEOUT)
336	{
337	pState->mfIOError = true;
338	LogRel(("Teleporter/TCP: Header select error: %Rrc\n", rc));
339	break;
340	}
341	if (pState->mfStopReading)
342	{
343	rc = VERR_EOF;
344	break;
345	}
346	} while (rc == VERR_TIMEOUT);
347	return rc;
348	}
349
350
351	/**
352	* @copydoc SSMSTRMOPS::pfnRead
353	*/
354	static DECLCALLBACK(int) teleporterTcpOpRead(void pvUser, uint64_t offStream, void pvBuf, size_t cbToRead, size_t *pcbRead)
355	{
356	TeleporterState pState = (TeleporterState )pvUser;
357	AssertReturn(!pState->mfIsSource, VERR_INVALID_HANDLE);
358
359	for (;;)
360	{
361	int rc;
362
363	/*
364	* Check for various conditions and may have been signalled.
365	*/
366	if (pState->mfEndOfStream)
367	return VERR_EOF;
368	if (pState->mfStopReading)
369	return VERR_EOF;
370	if (pState->mfIOError)
371	return VERR_IO_GEN_FAILURE;
372
373	/*
374	* If there is no more data in the current block, read the next
375	* block header.
376	*/
377	if (!pState->mcbReadBlock)
378	{
379	rc = teleporterTcpReadSelect(pState);
380	if (RT_FAILURE(rc))
381	return rc;
382	TELEPORTERTCPHDR Hdr;
383	rc = RTTcpRead(pState->mhSocket, &Hdr, sizeof(Hdr), NULL);
384	if (RT_FAILURE(rc))
385	{
386	pState->mfIOError = true;
387	LogRel(("Teleporter/TCP: Header read error: %Rrc\n", rc));
388	return rc;
389	}
390	if ( Hdr.u32Magic != TELEPORTERTCPHDR_MAGIC
391	\|\| Hdr.cb > TELEPORTERTCPHDR_MAX_SIZE)
392	{
393	pState->mfIOError = true;
394	LogRel(("Teleporter/TCP: Invalid block: u32Magic=%#x cb=%#x\n", Hdr.u32Magic, Hdr.cb));
395	return VERR_IO_GEN_FAILURE;
396	}
397
398	pState->mcbReadBlock = Hdr.cb;
399	if (!Hdr.cb)
400	{
401	pState->mfEndOfStream = true;
402	return VERR_EOF;
403	}
404
405	if (pState->mfStopReading)
406	return VERR_EOF;
407	}
408
409	/*
410	* Read more data.
411	*/
412	rc = teleporterTcpReadSelect(pState);
413	if (RT_FAILURE(rc))
414	return rc;
415	uint32_t cb = (uint32_t)RT_MIN(pState->mcbReadBlock, cbToRead);
416	rc = RTTcpRead(pState->mhSocket, pvBuf, cb, pcbRead);
417	if (RT_FAILURE(rc))
418	{
419	pState->mfIOError = true;
420	LogRel(("Teleporter/TCP: Data read error: %Rrc (cb=%#x)\n", rc, cb));
421	return rc;
422	}
423	if (pcbRead)
424	{
425	cb = (uint32_t)*pcbRead;
426	pState->moffStream += cb;
427	pState->mcbReadBlock -= cb;
428	return VINF_SUCCESS;
429	}
430	pState->moffStream += cb;
431	pState->mcbReadBlock -= cb;
432	if (cbToRead == cb)
433	return VINF_SUCCESS;
434
435	/* Advance to the next block. */
436	cbToRead -= cb;
437	pvBuf = (uint8_t *)pvBuf + cb;
438	}
439	}
440
441
442	/**
443	* @copydoc SSMSTRMOPS::pfnSeek
444	*/
445	static DECLCALLBACK(int) teleporterTcpOpSeek(void pvUser, int64_t offSeek, unsigned uMethod, uint64_t poffActual)
446	{
447	return VERR_NOT_SUPPORTED;
448	}
449
450
451	/**
452	* @copydoc SSMSTRMOPS::pfnTell
453	*/
454	static DECLCALLBACK(uint64_t) teleporterTcpOpTell(void *pvUser)
455	{
456	TeleporterState pState = (TeleporterState )pvUser;
457	return pState->moffStream;
458	}
459
460
461	/**
462	* @copydoc SSMSTRMOPS::pfnSize
463	*/
464	static DECLCALLBACK(int) teleporterTcpOpSize(void pvUser, uint64_t pcb)
465	{
466	return VERR_NOT_SUPPORTED;
467	}
468
469
470	/**
471	* @copydoc SSMSTRMOPS::pfnIsOk
472	*/
473	static DECLCALLBACK(int) teleporterTcpOpIsOk(void *pvUser)
474	{
475	TeleporterState pState = (TeleporterState )pvUser;
476
477	if (pState->mfIsSource)
478	{
479	/* Poll for incoming NACKs and errors from the other side */
480	int rc = RTTcpSelectOne(pState->mhSocket, 0);
481	if (rc != VERR_TIMEOUT)
482	{
483	if (RT_SUCCESS(rc))
484	{
485	LogRel(("Teleporter/TCP: Incoming data detect by IsOk, assuming it's a cancel.\n"));
486	rc = VERR_SSM_CANCELLED;
487	}
488	else
489	LogRel(("Teleporter/TCP: RTTcpSelectOne -> %Rrc (IsOk).\n", rc));
490	return rc;
491	}
492	}
493
494	return VINF_SUCCESS;
495	}
496
497
498	/**
499	* @copydoc SSMSTRMOPS::pfnClose
500	*/
501	static DECLCALLBACK(int) teleporterTcpOpClose(void *pvUser)
502	{
503	TeleporterState pState = (TeleporterState )pvUser;
504
505	if (pState->mfIsSource)
506	{
507	TELEPORTERTCPHDR EofHdr = { TELEPORTERTCPHDR_MAGIC, 0 };
508	int rc = RTTcpWrite(pState->mhSocket, &EofHdr, sizeof(EofHdr));
509	if (RT_SUCCESS(rc))
510	rc = RTTcpFlush(pState->mhSocket);
511	if (RT_FAILURE(rc))
512	{
513	LogRel(("Teleporter/TCP: EOF Header write error: %Rrc\n", rc));
514	return rc;
515	}
516	}
517	else
518	{
519	ASMAtomicWriteBool(&pState->mfStopReading, true);
520	RTTcpFlush(pState->mhSocket);
521	}
522
523	return VINF_SUCCESS;
524	}
525
526
527	/**
528	* Method table for a TCP based stream.
529	*/
530	static SSMSTRMOPS const g_teleporterTcpOps =
531	{
532	SSMSTRMOPS_VERSION,
533	teleporterTcpOpWrite,
534	teleporterTcpOpRead,
535	teleporterTcpOpSeek,
536	teleporterTcpOpTell,
537	teleporterTcpOpSize,
538	teleporterTcpOpIsOk,
539	teleporterTcpOpClose,
540	SSMSTRMOPS_VERSION
541	};
542
543
544	/**
545	* Progress cancelation callback.
546	*/
547	static void teleporterProgressCancelCallback(void *pvUser)
548	{
549	TeleporterState pState = (TeleporterState )pvUser;
550	SSMR3Cancel(pState->mpVM);
551	if (!pState->mfIsSource)
552	{
553	TeleporterStateTrg pStateTrg = (TeleporterStateTrg )pState;
554	RTTcpServerShutdown(pStateTrg->mhServer);
555	}
556	}
557
558	/**
559	* @copydoc PFNVMPROGRESS
560	*/
561	static DECLCALLBACK(int) teleporterProgressCallback(PVM pVM, unsigned uPercent, void *pvUser)
562	{
563	TeleporterState pState = (TeleporterState )pvUser;
564	if (pState->mptrProgress)
565	{
566	HRESULT hrc = pState->mptrProgress->SetCurrentOperationProgress(uPercent);
567	if (FAILED(hrc))
568	{
569	/* check if the failure was caused by cancellation. */
570	BOOL fCancelled;
571	hrc = pState->mptrProgress->COMGETTER(Canceled)(&fCancelled);
572	if (SUCCEEDED(hrc) && fCancelled)
573	{
574	SSMR3Cancel(pState->mpVM);
575	return VERR_SSM_CANCELLED;
576	}
577	}
578	}
579
580	return VINF_SUCCESS;
581	}
582
583
584	/**
585	* @copydoc FNRTTIMERLR
586	*/
587	static DECLCALLBACK(void) teleporterDstTimeout(RTTIMERLR hTimerLR, void *pvUser, uint64_t iTick)
588	{
589	/* This is harmless for any open connections. */
590	RTTcpServerShutdown((PRTTCPSERVER)pvUser);
591	}
592
593
594	/**
595	* Do the teleporter.
596	*
597	* @returns VBox status code.
598	* @param pState The teleporter state.
599	*/
600	HRESULT
601	Console::teleporterSrc(TeleporterStateSrc *pState)
602	{
603	AutoCaller autoCaller(this);
604	CheckComRCReturnRC(autoCaller.rc());
605
606	/*
607	* Wait for Console::Teleport to change the state.
608	*/
609	{ AutoWriteLock autoLock(this); }
610
611	BOOL fCancelled = TRUE;
612	HRESULT hrc = pState->mptrProgress->COMGETTER(Canceled)(&fCancelled);
613	if (FAILED(hrc))
614	return hrc;
615	if (fCancelled)
616	return setError(E_FAIL, tr("cancelled"));
617
618	/*
619	* Try connect to the destination machine.
620	* (Note. The caller cleans up mhSocket, so we can return without worries.)
621	*/
622	int vrc = RTTcpClientConnect(pState->mstrHostname.c_str(), pState->muPort, &pState->mhSocket);
623	if (RT_FAILURE(vrc))
624	return setError(E_FAIL, tr("Failed to connect to port %u on '%s': %Rrc"),
625	pState->muPort, pState->mstrHostname.c_str(), vrc);
626
627	/* Read and check the welcome message. */
628	char szLine[RT_MAX(128, sizeof(g_szWelcome))];
629	RT_ZERO(szLine);
630	vrc = RTTcpRead(pState->mhSocket, szLine, sizeof(g_szWelcome) - 1, NULL);
631	if (RT_FAILURE(vrc))
632	return setError(E_FAIL, tr("Failed to read welcome message: %Rrc"), vrc);
633	if (strcmp(szLine, g_szWelcome))
634	return setError(E_FAIL, tr("Unexpected welcome %.*Rhxs"), sizeof(g_szWelcome) - 1, szLine);
635
636	/* password */
637	pState->mstrPassword.append('\n');
638	vrc = RTTcpWrite(pState->mhSocket, pState->mstrPassword.c_str(), pState->mstrPassword.length());
639	if (RT_FAILURE(vrc))
640	return setError(E_FAIL, tr("Failed to send password: %Rrc"), vrc);
641
642	/* ACK */
643	hrc = teleporterSrcReadACK(pState, "password", tr("Invalid password"));
644	if (FAILED(hrc))
645	return hrc;
646
647	/*
648	* Start loading the state.
649	*
650	* Note! The saved state includes vital configuration data which will be
651	* verified against the VM config on the other end. This is all done
652	* in the first pass, so we should fail pretty promptly on misconfig.
653	*/
654	hrc = teleporterSrcSubmitCommand(pState, "load");
655	if (FAILED(hrc))
656	return hrc;
657
658	void pvUser = static_cast<void >(static_cast<TeleporterState *>(pState));
659	vrc = VMR3Teleport(pState->mpVM, pState->mcMsMaxDowntime,
660	&g_teleporterTcpOps, pvUser,
661	teleporterProgressCallback, pvUser,
662	&pState->mfSuspendedByUs);
663	if (RT_FAILURE(vrc))
664	return setError(E_FAIL, tr("VMR3Teleport -> %Rrc"), vrc);
665
666	hrc = teleporterSrcReadACK(pState, "load-complete");
667	if (FAILED(hrc))
668	return hrc;
669
670	/*
671	* We're at the point of no return.
672	*/
673	if (!pState->mptrProgress->notifyPointOfNoReturn())
674	{
675	teleporterSrcSubmitCommand(pState, "cancel", false /fWaitForAck/);
676	return E_FAIL;
677	}
678
679	/*
680	* Hand over any media which we might be sharing.
681	*
682	* Note! This is only important on localhost teleportations.
683	*/
684	/** @todo Maybe we should only do this if it's a local teleportation... */
685	hrc = mControl->UnlockMedia();
686	if (FAILED(hrc))
687	return hrc;
688	pState->mfUnlockedMedia = true;
689
690	hrc = teleporterSrcSubmitCommand(pState, "lock-media");
691	if (FAILED(hrc))
692	return hrc;
693
694	/*
695	* The FINAL step is giving the target instructions how to proceed with the VM.
696	*/
697	if ( vrc == VINF_SSM_LIVE_SUSPENDED
698	\|\| pState->menmOldMachineState == MachineState_Paused)
699	hrc = teleporterSrcSubmitCommand(pState, "hand-over-paused");
700	else
701	hrc = teleporterSrcSubmitCommand(pState, "hand-over-resume");
702	if (FAILED(hrc))
703	return hrc;
704
705	/*
706	* teleporterSrcThreadWrapper will do the automatic power off because it
707	* has to release the AutoVMCaller.
708	*/
709	return S_OK;
710	}
711
712
713	/**
714	* Static thread method wrapper.
715	*
716	* @returns VINF_SUCCESS (ignored).
717	* @param hThread The thread.
718	* @param pvUser Pointer to a TeleporterStateSrc instance.
719	*/
720	/static/ DECLCALLBACK(int)
721	Console::teleporterSrcThreadWrapper(RTTHREAD hThread, void *pvUser)
722	{
723	TeleporterStateSrc pState = (TeleporterStateSrc )pvUser;
724
725	/*
726	* Console::teleporterSrc does the work, we just grab onto the VM handle
727	* and do the cleanups afterwards.
728	*/
729	AutoVMCaller autoVMCaller(pState->mptrConsole);
730	HRESULT hrc = autoVMCaller.rc();
731
732	if (SUCCEEDED(hrc))
733	hrc = pState->mptrConsole->teleporterSrc(pState);
734
735	/* Close the connection ASAP on so that the other side can complete. */
736	if (pState->mhSocket != NIL_RTSOCKET)
737	{
738	RTTcpClientClose(pState->mhSocket);
739	pState->mhSocket = NIL_RTSOCKET;
740	}
741
742	/* Aaarg! setMachineState trashes error info on Windows, so we have to
743	complete things here on failure instead of right before cleanup. */
744	if (FAILED(hrc))
745	pState->mptrProgress->notifyComplete(hrc);
746
747	/* We can no longer be cancelled (success), or it doesn't matter any longer (failure). */
748	pState->mptrProgress->setCancelCallback(NULL, NULL);
749
750	/*
751	* Write lock the console before resetting mptrCancelableProgress and
752	* fixing the state.
753	*/
754	AutoWriteLock autoLock(pState->mptrConsole);
755	pState->mptrConsole->mptrCancelableProgress.setNull();
756
757	VMSTATE const enmVMState = VMR3GetState(pState->mpVM);
758	MachineState_T const enmMachineState = pState->mptrConsole->mMachineState;
759	if (SUCCEEDED(hrc))
760	{
761	/*
762	* Automatically shut down the VM on success.
763	*
764	* Note! We have to release the VM caller object or we'll deadlock in
765	* powerDown.
766	*/
767	AssertLogRelMsg(enmVMState == VMSTATE_SUSPENDED, ("%s\n", VMR3GetStateName(enmVMState)));
768	AssertLogRelMsg(enmMachineState == MachineState_TeleportingPausedVM, ("%s\n", Global::stringifyMachineState(enmMachineState)));
769
770	autoVMCaller.release();
771	hrc = pState->mptrConsole->powerDown();
772	pState->mptrProgress->notifyComplete(hrc);
773	}
774	else
775	{
776	/*
777	* Work the state machinery on failure.
778	*
779	* If the state is no longer 'Teleporting*', some other operation has
780	* canceled us and there is nothing we need to do here. In all other
781	* cases, we've failed one way or another.
782	*/
783	if ( enmMachineState == MachineState_Teleporting
784	\|\| enmMachineState == MachineState_TeleportingPausedVM
785	)
786	{
787	if (pState->mfUnlockedMedia)
788	{
789	ErrorInfoKeeper Oak;
790	HRESULT hrc2 = pState->mptrConsole->mControl->LockMedia();
791	if (FAILED(hrc2))
792	{
793	uint64_t StartMS = RTTimeMilliTS();
794	do
795	{
796	RTThreadSleep(2);
797	hrc2 = pState->mptrConsole->mControl->LockMedia();
798	} while ( FAILED(hrc2)
799	&& RTTimeMilliTS() - StartMS < 2000);
800	}
801	if (SUCCEEDED(hrc2))
802	pState->mfUnlockedMedia = true;
803	else
804	LogRel(("FATAL ERROR: Failed to re-take the media locks. hrc2=%Rhrc\n", hrc2));
805	}
806
807	switch (enmVMState)
808	{
809	case VMSTATE_RUNNING:
810	case VMSTATE_RUNNING_LS:
811	case VMSTATE_DEBUGGING:
812	case VMSTATE_DEBUGGING_LS:
813	case VMSTATE_POWERING_OFF:
814	case VMSTATE_POWERING_OFF_LS:
815	case VMSTATE_RESETTING:
816	case VMSTATE_RESETTING_LS:
817	Assert(!pState->mfSuspendedByUs);
818	Assert(!pState->mfUnlockedMedia);
819	pState->mptrConsole->setMachineState(MachineState_Running);
820	break;
821
822	case VMSTATE_GURU_MEDITATION:
823	case VMSTATE_GURU_MEDITATION_LS:
824	pState->mptrConsole->setMachineState(MachineState_Stuck);
825	break;
826
827	case VMSTATE_FATAL_ERROR:
828	case VMSTATE_FATAL_ERROR_LS:
829	pState->mptrConsole->setMachineState(MachineState_Paused);
830	break;
831
832	default:
833	AssertMsgFailed(("%s\n", VMR3GetStateName(enmVMState)));
834	case VMSTATE_SUSPENDED:
835	case VMSTATE_SUSPENDED_LS:
836	case VMSTATE_SUSPENDING:
837	case VMSTATE_SUSPENDING_LS:
838	case VMSTATE_SUSPENDING_EXT_LS:
839	if (!pState->mfUnlockedMedia)
840	{
841	pState->mptrConsole->setMachineState(MachineState_Paused);
842	if (pState->mfSuspendedByUs)
843	{
844	autoLock.leave();
845	int rc = VMR3Resume(pState->mpVM);
846	AssertLogRelMsgRC(rc, ("VMR3Resume -> %Rrc\n", rc));
847	autoLock.enter();
848	}
849	}
850	else
851	{
852	/* Faking a guru meditation is the best I can think of doing here... */
853	pState->mptrConsole->setMachineState(MachineState_Stuck);
854	}
855	break;
856	}
857	}
858	}
859	autoLock.leave();
860
861	/*
862	* Cleanup.
863	*/
864	Assert(pState->mhSocket == NIL_RTSOCKET);
865	delete pState;
866
867	return VINF_SUCCESS; /* ignored */
868	}
869
870
871	/**
872	* Start teleporter to the specified target.
873	*
874	* @returns COM status code.
875	*
876	* @param aHostname The name of the target host.
877	* @param aPort The TCP port number.
878	* @param aPassword The password.
879	* @param aMaxDowntime Max allowed "downtime" in milliseconds.
880	* @param aProgress Where to return the progress object.
881	*/
882	STDMETHODIMP
883	Console::Teleport(IN_BSTR aHostname, ULONG aPort, IN_BSTR aPassword, ULONG aMaxDowntime, IProgress **aProgress)
884	{
885	/*
886	* Validate parameters, check+hold object status, write lock the object
887	* and validate the state.
888	*/
889	CheckComArgOutPointerValid(aProgress);
890	CheckComArgStrNotEmptyOrNull(aHostname);
891	CheckComArgNotNull(aHostname);
892	CheckComArgExprMsg(aPort, aPort > 0 && aPort <= 65535, ("is %u", aPort));
893	CheckComArgExprMsg(aMaxDowntime, aMaxDowntime > 0, ("is %u", aMaxDowntime));
894
895	AutoCaller autoCaller(this);
896	CheckComRCReturnRC(autoCaller.rc());
897
898	AutoWriteLock autoLock(this);
899	LogFlowThisFunc(("mMachineState=%d\n", mMachineState));
900
901	switch (mMachineState)
902	{
903	case MachineState_Running:
904	case MachineState_Paused:
905	break;
906
907	default:
908	return setError(VBOX_E_INVALID_VM_STATE,
909	tr("Invalid machine state: %s (must be Running or Paused)"),
910	Global::stringifyMachineState(mMachineState));
911	}
912
913
914	/*
915	* Create a progress object, spawn a worker thread and change the state.
916	* Note! The thread won't start working until we release the lock.
917	*/
918	LogFlowThisFunc(("Initiating TELEPORT request...\n"));
919
920	ComObjPtr<Progress> ptrProgress;
921	HRESULT hrc = ptrProgress.createObject();
922	CheckComRCReturnRC(hrc);
923	hrc = ptrProgress->init(static_cast<IConsole >(this), Bstr(tr("Teleporter")), TRUE /aCancelable*/);
924	CheckComRCReturnRC(hrc);
925
926	TeleporterStateSrc *pState = new TeleporterStateSrc(this, mpVM, ptrProgress, mMachineState);
927	pState->mstrPassword = aPassword;
928	pState->mstrHostname = aHostname;
929	pState->muPort = aPort;
930	pState->mcMsMaxDowntime = aMaxDowntime;
931
932	void pvUser = static_cast<void >(static_cast<TeleporterState *>(pState));
933	ptrProgress->setCancelCallback(teleporterProgressCancelCallback, pvUser);
934
935	int vrc = RTThreadCreate(NULL, Console::teleporterSrcThreadWrapper, (void )pState, 0 /cbStack*/,
936	RTTHREADTYPE_EMULATION, 0 /fFlags/, "Teleport");
937	if (RT_SUCCESS(vrc))
938	{
939	if (mMachineState == MachineState_Running)
940	hrc = setMachineState(MachineState_Teleporting);
941	else
942	hrc = setMachineState(MachineState_TeleportingPausedVM);
943	if (SUCCEEDED(hrc))
944	{
945	ptrProgress.queryInterfaceTo(aProgress);
946	mptrCancelableProgress = ptrProgress;
947	}
948	else
949	ptrProgress->Cancel();
950	}
951	else
952	{
953	ptrProgress->setCancelCallback(NULL, NULL);
954	delete pState;
955	hrc = setError(E_FAIL, tr("RTThreadCreate -> %Rrc"), vrc);
956	}
957
958	return hrc;
959	}
960
961
962	/**
963	* Creates a TCP server that listens for the source machine and passes control
964	* over to Console::teleporterTrgServeConnection().
965	*
966	* @returns VBox status code.
967	* @param pVM The VM handle
968	* @param pMachine The IMachine for the virtual machine.
969	* @param fStartPaused Whether to start it in the Paused (true) or
970	* Running (false) state,
971	* @param pProgress Pointer to the progress object.
972	*
973	* @remarks The caller expects error information to be set on failure.
974	* @todo Check that all the possible failure paths sets error info...
975	*/
976	int
977	Console::teleporterTrg(PVM pVM, IMachine pMachine, bool fStartPaused, Progress pProgress)
978	{
979	/*
980	* Get the config.
981	*/
982	ULONG uPort;
983	HRESULT hrc = pMachine->COMGETTER(TeleporterPort)(&uPort);
984	if (FAILED(hrc))
985	return VERR_GENERAL_FAILURE;
986	ULONG const uPortOrg = uPort;
987
988	Bstr bstrAddress;
989	hrc = pMachine->COMGETTER(TeleporterAddress)(bstrAddress.asOutParam());
990	if (FAILED(hrc))
991	return VERR_GENERAL_FAILURE;
992	Utf8Str strAddress(bstrAddress);
993	const char *pszAddress = strAddress.isEmpty() ? NULL : strAddress.c_str();
994
995	Bstr bstrPassword;
996	hrc = pMachine->COMGETTER(TeleporterPassword)(bstrPassword.asOutParam());
997	if (FAILED(hrc))
998	return VERR_GENERAL_FAILURE;
999	Utf8Str strPassword(bstrPassword);
1000	strPassword.append('\n'); /* To simplify password checking. */
1001
1002	/*
1003	* Create the TCP server.
1004	*/
1005	int vrc;
1006	PRTTCPSERVER hServer;
1007	if (uPort)
1008	vrc = RTTcpServerCreateEx(pszAddress, uPort, &hServer);
1009	else
1010	{
1011	for (int cTries = 10240; cTries > 0; cTries--)
1012	{
1013	uPort = RTRandU32Ex(cTries >= 8192 ? 49152 : 1024, 65534);
1014	vrc = RTTcpServerCreateEx(pszAddress, uPort, &hServer);
1015	if (vrc != VERR_NET_ADDRESS_IN_USE)
1016	break;
1017	}
1018	if (RT_SUCCESS(vrc))
1019	{
1020	hrc = pMachine->COMSETTER(TeleporterPort)(uPort);
1021	if (FAILED(hrc))
1022	{
1023	RTTcpServerDestroy(hServer);
1024	return VERR_GENERAL_FAILURE;
1025	}
1026	}
1027	}
1028	if (RT_FAILURE(vrc))
1029	return vrc;
1030
1031	/*
1032	* Create a one-shot timer for timing out after 5 mins.
1033	*/
1034	RTTIMERLR hTimerLR;
1035	vrc = RTTimerLRCreateEx(&hTimerLR, 0 /ns/, RTTIMER_FLAGS_CPU_ANY, teleporterDstTimeout, hServer);
1036	if (RT_SUCCESS(vrc))
1037	{
1038	vrc = RTTimerLRStart(hTimerLR, 560UINT64_C(1000000000) /ns/);
1039	if (RT_SUCCESS(vrc))
1040	{
1041	/*
1042	* Do the job, when it returns we're done.
1043	*/
1044	TeleporterStateTrg State(this, pVM, pProgress, pMachine, mControl, &hTimerLR, fStartPaused);
1045	State.mstrPassword = strPassword;
1046	State.mhServer = hServer;
1047
1048	void pvUser = static_cast<void >(static_cast<TeleporterState *>(&State));
1049	if (pProgress->setCancelCallback(teleporterProgressCancelCallback, pvUser))
1050	{
1051	LogRel(("Teleporter: Waiting for incoming VM...\n"));
1052	vrc = RTTcpServerListen(hServer, Console::teleporterTrgServeConnection, &State);
1053	pProgress->setCancelCallback(NULL, NULL);
1054
1055	bool fPowerOff = false;
1056	if (vrc == VERR_TCP_SERVER_STOP)
1057	{
1058	vrc = State.mRc;
1059	/* Power off the VM on failure unless the state callback
1060	already did that. */
1061	if (RT_FAILURE(vrc))
1062	{
1063	VMSTATE enmVMState = VMR3GetState(pVM);
1064	if ( enmVMState != VMSTATE_OFF
1065	&& enmVMState != VMSTATE_POWERING_OFF)
1066	fPowerOff = true;
1067	}
1068	}
1069	else if (vrc == VERR_TCP_SERVER_SHUTDOWN)
1070	{
1071	BOOL fCancelled = TRUE;
1072	hrc = pProgress->COMGETTER(Canceled)(&fCancelled);
1073	if (FAILED(hrc) \|\| fCancelled)
1074	{
1075	setError(E_FAIL, tr("Teleporting canceled"));
1076	vrc = VERR_SSM_CANCELLED;
1077	}
1078	else
1079	{
1080	setError(E_FAIL, tr("Teleporter timed out waiting for incoming connection"));
1081	vrc = VERR_TIMEOUT;
1082	}
1083	LogRel(("Teleporter: RTTcpServerListen aborted - %Rrc\n", vrc));
1084	fPowerOff = true;
1085	}
1086	else
1087	{
1088	LogRel(("Teleporter: Unexpected RTTcpServerListen rc: %Rrc\n", vrc));
1089	vrc = VERR_IPE_UNEXPECTED_STATUS;
1090	fPowerOff = true;
1091	}
1092
1093	if (fPowerOff)
1094	{
1095	int vrc2 = VMR3PowerOff(pVM);
1096	AssertRC(vrc2);
1097	}
1098	}
1099	else
1100	vrc = VERR_SSM_CANCELLED;
1101	}
1102
1103	RTTimerLRDestroy(hTimerLR);
1104	}
1105	RTTcpServerDestroy(hServer);
1106
1107	/*
1108	* If we change TeleporterPort above, set it back to it's original
1109	* value before returning.
1110	*/
1111	if (uPortOrg != uPort)
1112	pMachine->COMSETTER(TeleporterPort)(uPortOrg);
1113
1114	return vrc;
1115	}
1116
1117
1118	/**
1119	* Unlock the media.
1120	*
1121	* This is used in error paths.
1122	*
1123	* @param pState The teleporter state.
1124	*/
1125	static void teleporterTrgUnlockMedia(TeleporterStateTrg *pState)
1126	{
1127	if (pState->mfLockedMedia)
1128	{
1129	pState->mpControl->UnlockMedia();
1130	pState->mfLockedMedia = false;
1131	}
1132	}
1133
1134
1135	static int teleporterTcpWriteACK(TeleporterStateTrg *pState, bool fAutomaticUnlock = true)
1136	{
1137	int rc = RTTcpWrite(pState->mhSocket, "ACK\n", sizeof("ACK\n") - 1);
1138	if (RT_FAILURE(rc))
1139	{
1140	LogRel(("Teleporter: RTTcpWrite(,ACK,) -> %Rrc\n", rc));
1141	if (fAutomaticUnlock)
1142	teleporterTrgUnlockMedia(pState);
1143	}
1144	RTTcpFlush(pState->mhSocket);
1145	return rc;
1146	}
1147
1148
1149	static int teleporterTcpWriteNACK(TeleporterStateTrg *pState, int32_t rc2)
1150	{
1151	/*
1152	* Unlock media sending the NACK. That way the other doesn't have to spin
1153	* waiting to regain the locks.
1154	*/
1155	teleporterTrgUnlockMedia(pState);
1156
1157	char szMsg[64];
1158	size_t cch = RTStrPrintf(szMsg, sizeof(szMsg), "NACK=%d\n", rc2);
1159	int rc = RTTcpWrite(pState->mhSocket, szMsg, cch);
1160	if (RT_FAILURE(rc))
1161	LogRel(("Teleporter: RTTcpWrite(,%s,%zu) -> %Rrc\n", szMsg, cch, rc));
1162	RTTcpFlush(pState->mhSocket);
1163	return rc;
1164	}
1165
1166
1167	/**
1168	* @copydoc FNRTTCPSERVE
1169	*
1170	* @returns VINF_SUCCESS or VERR_TCP_SERVER_STOP.
1171	*/
1172	/static/ DECLCALLBACK(int)
1173	Console::teleporterTrgServeConnection(RTSOCKET Sock, void *pvUser)
1174	{
1175	TeleporterStateTrg pState = (TeleporterStateTrg )pvUser;
1176	pState->mhSocket = Sock;
1177
1178	/*
1179	* Say hello.
1180	*/
1181	int vrc = RTTcpWrite(Sock, g_szWelcome, sizeof(g_szWelcome) - 1);
1182	if (RT_FAILURE(vrc))
1183	{
1184	LogRel(("Teleporter: Failed to write welcome message: %Rrc\n", vrc));
1185	return VINF_SUCCESS;
1186	}
1187
1188	/*
1189	* Password (includes '\n', see teleporterTrg).
1190	*/
1191	const char *pszPassword = pState->mstrPassword.c_str();
1192	unsigned off = 0;
1193	while (pszPassword[off])
1194	{
1195	char ch;
1196	vrc = RTTcpRead(Sock, &ch, sizeof(ch), NULL);
1197	if ( RT_FAILURE(vrc)
1198	\|\| pszPassword[off] != ch)
1199	{
1200	if (RT_FAILURE(vrc))
1201	LogRel(("Teleporter: Password read failure (off=%u): %Rrc\n", off, vrc));
1202	else
1203	LogRel(("Teleporter: Invalid password (off=%u)\n", off));
1204	teleporterTcpWriteNACK(pState, VERR_AUTHENTICATION_FAILURE);
1205	return VINF_SUCCESS;
1206	}
1207	off++;
1208	}
1209	vrc = teleporterTcpWriteACK(pState);
1210	if (RT_FAILURE(vrc))
1211	return VINF_SUCCESS;
1212	LogRel(("Teleporter: Incoming VM!\n"));
1213
1214	/*
1215	* Stop the server and cancel the timeout timer.
1216	*
1217	* Note! After this point we must return VERR_TCP_SERVER_STOP, while prior
1218	* to it we must not return that value!
1219	*/
1220	RTTcpServerShutdown(pState->mhServer);
1221	RTTimerLRDestroy(*pState->mphTimerLR);
1222	*pState->mphTimerLR = NIL_RTTIMERLR;
1223
1224	/*
1225	* Command processing loop.
1226	*/
1227	bool fDone = false;
1228	for (;;)
1229	{
1230	char szCmd[128];
1231	vrc = teleporterTcpReadLine(pState, szCmd, sizeof(szCmd));
1232	if (RT_FAILURE(vrc))
1233	break;
1234
1235	if (!strcmp(szCmd, "load"))
1236	{
1237	vrc = teleporterTcpWriteACK(pState);
1238	if (RT_FAILURE(vrc))
1239	break;
1240
1241	pState->moffStream = 0;
1242	void pvUser = static_cast<void >(static_cast<TeleporterState *>(pState));
1243	vrc = VMR3LoadFromStream(pState->mpVM, &g_teleporterTcpOps, pvUser,
1244	teleporterProgressCallback, pvUser);
1245	if (RT_FAILURE(vrc))
1246	{
1247	LogRel(("Teleporter: VMR3LoadFromStream -> %Rrc\n", vrc));
1248	teleporterTcpWriteNACK(pState, vrc);
1249	break;
1250	}
1251
1252	/* The EOS might not have been read, make sure it is. */
1253	pState->mfStopReading = false;
1254	size_t cbRead;
1255	vrc = teleporterTcpOpRead(pvUser, pState->moffStream, szCmd, 1, &cbRead);
1256	if (vrc != VERR_EOF)
1257	{
1258	LogRel(("Teleporter: Draining teleporterTcpOpRead -> %Rrc\n", vrc));
1259	teleporterTcpWriteNACK(pState, vrc);
1260	break;
1261	}
1262
1263	vrc = teleporterTcpWriteACK(pState);
1264	}
1265	else if (!strcmp(szCmd, "cancel"))
1266	{
1267	/* Don't ACK this. */
1268	LogRel(("Teleporter: Received cancel command.\n"));
1269	vrc = VERR_SSM_CANCELLED;
1270	}
1271	else if (!strcmp(szCmd, "lock-media"))
1272	{
1273	HRESULT hrc = pState->mpControl->LockMedia();
1274	if (SUCCEEDED(hrc))
1275	{
1276	pState->mfLockedMedia = true;
1277	vrc = teleporterTcpWriteACK(pState);
1278	}
1279	else
1280	{
1281	vrc = VERR_FILE_LOCK_FAILED;
1282	teleporterTcpWriteNACK(pState, vrc);
1283	}
1284	}
1285	else if ( !strcmp(szCmd, "hand-over-resume")
1286	\|\| !strcmp(szCmd, "hand-over-paused"))
1287	{
1288	/*
1289	* Point of no return.
1290	*
1291	* Note! Since we cannot tell whether a VMR3Resume failure is
1292	* destructive for the source or not, we have little choice
1293	* but to ACK it first and take any failures locally.
1294	*
1295	* Ideally, we should try resume it first and then ACK (or
1296	* NACK) the request since this would reduce latency and
1297	* make it possible to recover from some VMR3Resume failures.
1298	*/
1299	if ( pState->mptrProgress->notifyPointOfNoReturn()
1300	&& pState->mfLockedMedia)
1301	{
1302	vrc = teleporterTcpWriteACK(pState);
1303	if (RT_SUCCESS(vrc))
1304	{
1305	if (!strcmp(szCmd, "hand-over-resume"))
1306	vrc = VMR3Resume(pState->mpVM);
1307	else
1308	pState->mptrConsole->setMachineState(MachineState_Paused);
1309	fDone = true;
1310	break;
1311	}
1312	}
1313	else
1314	{
1315	vrc = pState->mfLockedMedia ? VERR_WRONG_ORDER : VERR_SSM_CANCELLED;
1316	teleporterTcpWriteNACK(pState, vrc);
1317	}
1318	}
1319	else
1320	{
1321	LogRel(("Teleporter: Unknown command '%s' (%.*Rhxs)\n", szCmd, strlen(szCmd), szCmd));
1322	vrc = VERR_NOT_IMPLEMENTED;
1323	teleporterTcpWriteNACK(pState, vrc);
1324	}
1325
1326	if (RT_FAILURE(vrc))
1327	break;
1328	}
1329
1330	if (RT_SUCCESS(vrc) && !fDone)
1331	vrc = VERR_WRONG_ORDER;
1332	if (RT_FAILURE(vrc))
1333	teleporterTrgUnlockMedia(pState);
1334
1335	pState->mRc = vrc;
1336	pState->mhSocket = NIL_RTSOCKET;
1337	LogFlowFunc(("returns mRc=%Rrc\n", vrc));
1338	return VERR_TCP_SERVER_STOP;
1339	}
1340

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source: vbox/trunk/src/VBox/Main/ConsoleImplTeleporter.cpp@ 24895

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