ConsoleImplTeleporter.cpp@ 28965

Last change on this file since 28965 was 28965, checked in by vboxsync, 15 years ago
ConsoleImplTeleporter.cpp: Retain the socket before letting SSM have a go at it with two thread (EMT + I/O).
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File size: 41.9 KB

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1	/* $Id: ConsoleImplTeleporter.cpp 28965 2010-05-03 09:55:57Z vboxsync $ */
2	/** @file
3	* VBox Console COM Class implementation, The Teleporter Part.
4	*/
5
6	/*
7	* Copyright (C) 2009 Oracle Corporation
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
18
19	/*******************************************************************************
20	* Header Files *
21	*******************************************************************************/
22	#include "ConsoleImpl.h"
23	#include "Global.h"
24	#include "ProgressImpl.h"
25
26	#include "AutoCaller.h"
27	#include "Logging.h"
28
29	#include <iprt/err.h>
30	#include <iprt/rand.h>
31	#include <iprt/socket.h>
32	#include <iprt/tcp.h>
33	#include <iprt/timer.h>
34
35	#include <VBox/vmapi.h>
36	#include <VBox/ssm.h>
37	#include <VBox/err.h>
38	#include <VBox/version.h>
39	#include <VBox/com/string.h>
40
41
42	/*******************************************************************************
43	* Structures and Typedefs *
44	*******************************************************************************/
45	/**
46	* Base class for the teleporter state.
47	*
48	* These classes are used as advanced structs, not as proper classes.
49	*/
50	class TeleporterState
51	{
52	public:
53	ComPtr<Console> mptrConsole;
54	PVM mpVM;
55	ComObjPtr<Progress> mptrProgress;
56	Utf8Str mstrPassword;
57	bool const mfIsSource;
58
59	/** @name stream stuff
60	* @{ */
61	RTSOCKET mhSocket;
62	uint64_t moffStream;
63	uint32_t mcbReadBlock;
64	bool volatile mfStopReading;
65	bool volatile mfEndOfStream;
66	bool volatile mfIOError;
67	/** @} */
68
69	TeleporterState(Console pConsole, PVM pVM, Progress pProgress, bool fIsSource)
70	: mptrConsole(pConsole)
71	, mpVM(pVM)
72	, mptrProgress(pProgress)
73	, mfIsSource(fIsSource)
74	, mhSocket(NIL_RTSOCKET)
75	, moffStream(UINT64_MAX / 2)
76	, mcbReadBlock(0)
77	, mfStopReading(false)
78	, mfEndOfStream(false)
79	, mfIOError(false)
80	{
81	}
82	};
83
84
85	/**
86	* Teleporter state used by the source side.
87	*/
88	class TeleporterStateSrc : public TeleporterState
89	{
90	public:
91	Utf8Str mstrHostname;
92	uint32_t muPort;
93	uint32_t mcMsMaxDowntime;
94	MachineState_T menmOldMachineState;
95	bool mfSuspendedByUs;
96	bool mfUnlockedMedia;
97
98	TeleporterStateSrc(Console pConsole, PVM pVM, Progress pProgress, MachineState_T enmOldMachineState)
99	: TeleporterState(pConsole, pVM, pProgress, true /fIsSource/)
100	, muPort(UINT32_MAX)
101	, mcMsMaxDowntime(250)
102	, menmOldMachineState(enmOldMachineState)
103	, mfSuspendedByUs(false)
104	, mfUnlockedMedia(false)
105	{
106	}
107	};
108
109
110	/**
111	* Teleporter state used by the destiation side.
112	*/
113	class TeleporterStateTrg : public TeleporterState
114	{
115	public:
116	IMachine *mpMachine;
117	IInternalMachineControl *mpControl;
118	PRTTCPSERVER mhServer;
119	PRTTIMERLR mphTimerLR;
120	bool mfLockedMedia;
121	int mRc;
122
123	TeleporterStateTrg(Console pConsole, PVM pVM, Progress pProgress,
124	IMachine pMachine, IInternalMachineControl pControl,
125	PRTTIMERLR phTimerLR, bool fStartPaused)
126	: TeleporterState(pConsole, pVM, pProgress, false /fIsSource/)
127	, mpMachine(pMachine)
128	, mpControl(pControl)
129	, mhServer(NULL)
130	, mphTimerLR(phTimerLR)
131	, mfLockedMedia(false)
132	, mRc(VINF_SUCCESS)
133	{
134	}
135	};
136
137
138	/**
139	* TCP stream header.
140	*
141	* This is an extra layer for fixing the problem with figuring out when the SSM
142	* stream ends.
143	*/
144	typedef struct TELEPORTERTCPHDR
145	{
146	/** Magic value. */
147	uint32_t u32Magic;
148	/** The size of the data block following this header.
149	* 0 indicates the end of the stream, while UINT32_MAX indicates
150	* cancelation. */
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
391	if (RT_UNLIKELY( Hdr.u32Magic != TELEPORTERTCPHDR_MAGIC
392	\|\| Hdr.cb > TELEPORTERTCPHDR_MAX_SIZE
393	\|\| Hdr.cb == 0))
394	{
395	if ( Hdr.u32Magic == TELEPORTERTCPHDR_MAGIC
396	&& ( Hdr.cb == 0
397	\|\| Hdr.cb == UINT32_MAX)
398	)
399	{
400	pState->mfEndOfStream = true;
401	pState->mcbReadBlock = 0;
402	return Hdr.cb ? VERR_SSM_CANCELLED : VERR_EOF;
403	}
404	pState->mfIOError = true;
405	LogRel(("Teleporter/TCP: Invalid block: u32Magic=%#x cb=%#x\n", Hdr.u32Magic, Hdr.cb));
406	return VERR_IO_GEN_FAILURE;
407	}
408
409	pState->mcbReadBlock = Hdr.cb;
410	if (pState->mfStopReading)
411	return VERR_EOF;
412	}
413
414	/*
415	* Read more data.
416	*/
417	rc = teleporterTcpReadSelect(pState);
418	if (RT_FAILURE(rc))
419	return rc;
420	uint32_t cb = (uint32_t)RT_MIN(pState->mcbReadBlock, cbToRead);
421	rc = RTTcpRead(pState->mhSocket, pvBuf, cb, pcbRead);
422	if (RT_FAILURE(rc))
423	{
424	pState->mfIOError = true;
425	LogRel(("Teleporter/TCP: Data read error: %Rrc (cb=%#x)\n", rc, cb));
426	return rc;
427	}
428	if (pcbRead)
429	{
430	cb = (uint32_t)*pcbRead;
431	pState->moffStream += cb;
432	pState->mcbReadBlock -= cb;
433	return VINF_SUCCESS;
434	}
435	pState->moffStream += cb;
436	pState->mcbReadBlock -= cb;
437	if (cbToRead == cb)
438	return VINF_SUCCESS;
439
440	/* Advance to the next block. */
441	cbToRead -= cb;
442	pvBuf = (uint8_t *)pvBuf + cb;
443	}
444	}
445
446
447	/**
448	* @copydoc SSMSTRMOPS::pfnSeek
449	*/
450	static DECLCALLBACK(int) teleporterTcpOpSeek(void pvUser, int64_t offSeek, unsigned uMethod, uint64_t poffActual)
451	{
452	return VERR_NOT_SUPPORTED;
453	}
454
455
456	/**
457	* @copydoc SSMSTRMOPS::pfnTell
458	*/
459	static DECLCALLBACK(uint64_t) teleporterTcpOpTell(void *pvUser)
460	{
461	TeleporterState pState = (TeleporterState )pvUser;
462	return pState->moffStream;
463	}
464
465
466	/**
467	* @copydoc SSMSTRMOPS::pfnSize
468	*/
469	static DECLCALLBACK(int) teleporterTcpOpSize(void pvUser, uint64_t pcb)
470	{
471	return VERR_NOT_SUPPORTED;
472	}
473
474
475	/**
476	* @copydoc SSMSTRMOPS::pfnIsOk
477	*/
478	static DECLCALLBACK(int) teleporterTcpOpIsOk(void *pvUser)
479	{
480	TeleporterState pState = (TeleporterState )pvUser;
481
482	if (pState->mfIsSource)
483	{
484	/* Poll for incoming NACKs and errors from the other side */
485	int rc = RTTcpSelectOne(pState->mhSocket, 0);
486	if (rc != VERR_TIMEOUT)
487	{
488	if (RT_SUCCESS(rc))
489	{
490	LogRel(("Teleporter/TCP: Incoming data detect by IsOk, assuming it is a cancellation NACK.\n"));
491	rc = VERR_SSM_CANCELLED;
492	}
493	else
494	LogRel(("Teleporter/TCP: RTTcpSelectOne -> %Rrc (IsOk).\n", rc));
495	return rc;
496	}
497	}
498
499	return VINF_SUCCESS;
500	}
501
502
503	/**
504	* @copydoc SSMSTRMOPS::pfnClose
505	*/
506	static DECLCALLBACK(int) teleporterTcpOpClose(void *pvUser, bool fCancelled)
507	{
508	TeleporterState pState = (TeleporterState )pvUser;
509
510	if (pState->mfIsSource)
511	{
512	TELEPORTERTCPHDR EofHdr;
513	EofHdr.u32Magic = TELEPORTERTCPHDR_MAGIC;
514	EofHdr.cb = fCancelled ? UINT32_MAX : 0;
515	int rc = RTTcpWrite(pState->mhSocket, &EofHdr, sizeof(EofHdr));
516	if (RT_SUCCESS(rc))
517	rc = RTTcpFlush(pState->mhSocket);
518	if (RT_FAILURE(rc))
519	{
520	LogRel(("Teleporter/TCP: EOF Header write error: %Rrc\n", rc));
521	return rc;
522	}
523	}
524	else
525	{
526	ASMAtomicWriteBool(&pState->mfStopReading, true);
527	RTTcpFlush(pState->mhSocket);
528	}
529
530	return VINF_SUCCESS;
531	}
532
533
534	/**
535	* Method table for a TCP based stream.
536	*/
537	static SSMSTRMOPS const g_teleporterTcpOps =
538	{
539	SSMSTRMOPS_VERSION,
540	teleporterTcpOpWrite,
541	teleporterTcpOpRead,
542	teleporterTcpOpSeek,
543	teleporterTcpOpTell,
544	teleporterTcpOpSize,
545	teleporterTcpOpIsOk,
546	teleporterTcpOpClose,
547	SSMSTRMOPS_VERSION
548	};
549
550
551	/**
552	* Progress cancelation callback.
553	*/
554	static void teleporterProgressCancelCallback(void *pvUser)
555	{
556	TeleporterState pState = (TeleporterState )pvUser;
557	SSMR3Cancel(pState->mpVM);
558	if (!pState->mfIsSource)
559	{
560	TeleporterStateTrg pStateTrg = (TeleporterStateTrg )pState;
561	RTTcpServerShutdown(pStateTrg->mhServer);
562	}
563	}
564
565	/**
566	* @copydoc PFNVMPROGRESS
567	*/
568	static DECLCALLBACK(int) teleporterProgressCallback(PVM pVM, unsigned uPercent, void *pvUser)
569	{
570	TeleporterState pState = (TeleporterState )pvUser;
571	if (pState->mptrProgress)
572	{
573	HRESULT hrc = pState->mptrProgress->SetCurrentOperationProgress(uPercent);
574	if (FAILED(hrc))
575	{
576	/* check if the failure was caused by cancellation. */
577	BOOL fCancelled;
578	hrc = pState->mptrProgress->COMGETTER(Canceled)(&fCancelled);
579	if (SUCCEEDED(hrc) && fCancelled)
580	{
581	SSMR3Cancel(pState->mpVM);
582	return VERR_SSM_CANCELLED;
583	}
584	}
585	}
586
587	return VINF_SUCCESS;
588	}
589
590
591	/**
592	* @copydoc FNRTTIMERLR
593	*/
594	static DECLCALLBACK(void) teleporterDstTimeout(RTTIMERLR hTimerLR, void *pvUser, uint64_t iTick)
595	{
596	/* This is harmless for any open connections. */
597	RTTcpServerShutdown((PRTTCPSERVER)pvUser);
598	}
599
600
601	/**
602	* Do the teleporter.
603	*
604	* @returns VBox status code.
605	* @param pState The teleporter state.
606	*/
607	HRESULT
608	Console::teleporterSrc(TeleporterStateSrc *pState)
609	{
610	AutoCaller autoCaller(this);
611	if (FAILED(autoCaller.rc())) return autoCaller.rc();
612
613	/*
614	* Wait for Console::Teleport to change the state.
615	*/
616	{ AutoWriteLock autoLock(this COMMA_LOCKVAL_SRC_POS); }
617
618	BOOL fCancelled = TRUE;
619	HRESULT hrc = pState->mptrProgress->COMGETTER(Canceled)(&fCancelled);
620	if (FAILED(hrc))
621	return hrc;
622	if (fCancelled)
623	return setError(E_FAIL, tr("cancelled"));
624
625	/*
626	* Try connect to the destination machine.
627	* (Note. The caller cleans up mhSocket, so we can return without worries.)
628	*/
629	int vrc = RTTcpClientConnect(pState->mstrHostname.c_str(), pState->muPort, &pState->mhSocket);
630	if (RT_FAILURE(vrc))
631	return setError(E_FAIL, tr("Failed to connect to port %u on '%s': %Rrc"),
632	pState->muPort, pState->mstrHostname.c_str(), vrc);
633
634	/* Read and check the welcome message. */
635	char szLine[RT_MAX(128, sizeof(g_szWelcome))];
636	RT_ZERO(szLine);
637	vrc = RTTcpRead(pState->mhSocket, szLine, sizeof(g_szWelcome) - 1, NULL);
638	if (RT_FAILURE(vrc))
639	return setError(E_FAIL, tr("Failed to read welcome message: %Rrc"), vrc);
640	if (strcmp(szLine, g_szWelcome))
641	return setError(E_FAIL, tr("Unexpected welcome %.*Rhxs"), sizeof(g_szWelcome) - 1, szLine);
642
643	/* password */
644	pState->mstrPassword.append('\n');
645	vrc = RTTcpWrite(pState->mhSocket, pState->mstrPassword.c_str(), pState->mstrPassword.length());
646	if (RT_FAILURE(vrc))
647	return setError(E_FAIL, tr("Failed to send password: %Rrc"), vrc);
648
649	/* ACK */
650	hrc = teleporterSrcReadACK(pState, "password", tr("Invalid password"));
651	if (FAILED(hrc))
652	return hrc;
653
654	/*
655	* Start loading the state.
656	*
657	* Note! The saved state includes vital configuration data which will be
658	* verified against the VM config on the other end. This is all done
659	* in the first pass, so we should fail pretty promptly on misconfig.
660	*/
661	hrc = teleporterSrcSubmitCommand(pState, "load");
662	if (FAILED(hrc))
663	return hrc;
664
665	void pvUser = static_cast<void >(static_cast<TeleporterState *>(pState));
666	vrc = VMR3Teleport(pState->mpVM, pState->mcMsMaxDowntime,
667	&g_teleporterTcpOps, pvUser,
668	teleporterProgressCallback, pvUser,
669	&pState->mfSuspendedByUs);
670	if (RT_FAILURE(vrc))
671	return setError(E_FAIL, tr("VMR3Teleport -> %Rrc"), vrc);
672
673	hrc = teleporterSrcReadACK(pState, "load-complete");
674	if (FAILED(hrc))
675	return hrc;
676
677	/*
678	* We're at the point of no return.
679	*/
680	if (!pState->mptrProgress->notifyPointOfNoReturn())
681	{
682	teleporterSrcSubmitCommand(pState, "cancel", false /fWaitForAck/);
683	return E_FAIL;
684	}
685
686	/*
687	* Hand over any media which we might be sharing.
688	*
689	* Note! This is only important on localhost teleportations.
690	*/
691	/** @todo Maybe we should only do this if it's a local teleportation... */
692	hrc = mControl->UnlockMedia();
693	if (FAILED(hrc))
694	return hrc;
695	pState->mfUnlockedMedia = true;
696
697	hrc = teleporterSrcSubmitCommand(pState, "lock-media");
698	if (FAILED(hrc))
699	return hrc;
700
701	/*
702	* The FINAL step is giving the target instructions how to proceed with the VM.
703	*/
704	if ( vrc == VINF_SSM_LIVE_SUSPENDED
705	\|\| pState->menmOldMachineState == MachineState_Paused)
706	hrc = teleporterSrcSubmitCommand(pState, "hand-over-paused");
707	else
708	hrc = teleporterSrcSubmitCommand(pState, "hand-over-resume");
709	if (FAILED(hrc))
710	return hrc;
711
712	/*
713	* teleporterSrcThreadWrapper will do the automatic power off because it
714	* has to release the AutoVMCaller.
715	*/
716	return S_OK;
717	}
718
719
720	/**
721	* Static thread method wrapper.
722	*
723	* @returns VINF_SUCCESS (ignored).
724	* @param hThread The thread.
725	* @param pvUser Pointer to a TeleporterStateSrc instance.
726	*/
727	/static/ DECLCALLBACK(int)
728	Console::teleporterSrcThreadWrapper(RTTHREAD hThread, void *pvUser)
729	{
730	TeleporterStateSrc pState = (TeleporterStateSrc )pvUser;
731
732	/*
733	* Console::teleporterSrc does the work, we just grab onto the VM handle
734	* and do the cleanups afterwards.
735	*/
736	AutoVMCaller autoVMCaller(pState->mptrConsole);
737	HRESULT hrc = autoVMCaller.rc();
738
739	if (SUCCEEDED(hrc))
740	hrc = pState->mptrConsole->teleporterSrc(pState);
741
742	/* Close the connection ASAP on so that the other side can complete. */
743	if (pState->mhSocket != NIL_RTSOCKET)
744	{
745	RTTcpClientClose(pState->mhSocket);
746	pState->mhSocket = NIL_RTSOCKET;
747	}
748
749	/* Aaarg! setMachineState trashes error info on Windows, so we have to
750	complete things here on failure instead of right before cleanup. */
751	if (FAILED(hrc))
752	pState->mptrProgress->notifyComplete(hrc);
753
754	/* We can no longer be cancelled (success), or it doesn't matter any longer (failure). */
755	pState->mptrProgress->setCancelCallback(NULL, NULL);
756
757	/*
758	* Write lock the console before resetting mptrCancelableProgress and
759	* fixing the state.
760	*/
761	AutoWriteLock autoLock(pState->mptrConsole COMMA_LOCKVAL_SRC_POS);
762	pState->mptrConsole->mptrCancelableProgress.setNull();
763
764	VMSTATE const enmVMState = VMR3GetState(pState->mpVM);
765	MachineState_T const enmMachineState = pState->mptrConsole->mMachineState;
766	if (SUCCEEDED(hrc))
767	{
768	/*
769	* Automatically shut down the VM on success.
770	*
771	* Note! We have to release the VM caller object or we'll deadlock in
772	* powerDown.
773	*/
774	AssertLogRelMsg(enmVMState == VMSTATE_SUSPENDED, ("%s\n", VMR3GetStateName(enmVMState)));
775	AssertLogRelMsg(enmMachineState == MachineState_TeleportingPausedVM, ("%s\n", Global::stringifyMachineState(enmMachineState)));
776
777	autoVMCaller.release();
778
779	pState->mptrConsole->mVMIsAlreadyPoweringOff = true; /* (Make sure we stick in the TeleportingPausedVM state.) */
780	hrc = pState->mptrConsole->powerDown();
781	pState->mptrConsole->mVMIsAlreadyPoweringOff = false;
782
783	pState->mptrProgress->notifyComplete(hrc);
784	}
785	else
786	{
787	/*
788	* Work the state machinery on failure.
789	*
790	* If the state is no longer 'Teleporting*', some other operation has
791	* canceled us and there is nothing we need to do here. In all other
792	* cases, we've failed one way or another.
793	*/
794	if ( enmMachineState == MachineState_Teleporting
795	\|\| enmMachineState == MachineState_TeleportingPausedVM
796	)
797	{
798	if (pState->mfUnlockedMedia)
799	{
800	ErrorInfoKeeper Oak;
801	HRESULT hrc2 = pState->mptrConsole->mControl->LockMedia();
802	if (FAILED(hrc2))
803	{
804	uint64_t StartMS = RTTimeMilliTS();
805	do
806	{
807	RTThreadSleep(2);
808	hrc2 = pState->mptrConsole->mControl->LockMedia();
809	} while ( FAILED(hrc2)
810	&& RTTimeMilliTS() - StartMS < 2000);
811	}
812	if (SUCCEEDED(hrc2))
813	pState->mfUnlockedMedia = true;
814	else
815	LogRel(("FATAL ERROR: Failed to re-take the media locks. hrc2=%Rhrc\n", hrc2));
816	}
817
818	switch (enmVMState)
819	{
820	case VMSTATE_RUNNING:
821	case VMSTATE_RUNNING_LS:
822	case VMSTATE_DEBUGGING:
823	case VMSTATE_DEBUGGING_LS:
824	case VMSTATE_POWERING_OFF:
825	case VMSTATE_POWERING_OFF_LS:
826	case VMSTATE_RESETTING:
827	case VMSTATE_RESETTING_LS:
828	Assert(!pState->mfSuspendedByUs);
829	Assert(!pState->mfUnlockedMedia);
830	pState->mptrConsole->setMachineState(MachineState_Running);
831	break;
832
833	case VMSTATE_GURU_MEDITATION:
834	case VMSTATE_GURU_MEDITATION_LS:
835	pState->mptrConsole->setMachineState(MachineState_Stuck);
836	break;
837
838	case VMSTATE_FATAL_ERROR:
839	case VMSTATE_FATAL_ERROR_LS:
840	pState->mptrConsole->setMachineState(MachineState_Paused);
841	break;
842
843	default:
844	AssertMsgFailed(("%s\n", VMR3GetStateName(enmVMState)));
845	case VMSTATE_SUSPENDED:
846	case VMSTATE_SUSPENDED_LS:
847	case VMSTATE_SUSPENDING:
848	case VMSTATE_SUSPENDING_LS:
849	case VMSTATE_SUSPENDING_EXT_LS:
850	if (!pState->mfUnlockedMedia)
851	{
852	pState->mptrConsole->setMachineState(MachineState_Paused);
853	if (pState->mfSuspendedByUs)
854	{
855	autoLock.leave();
856	int rc = VMR3Resume(pState->mpVM);
857	AssertLogRelMsgRC(rc, ("VMR3Resume -> %Rrc\n", rc));
858	autoLock.enter();
859	}
860	}
861	else
862	{
863	/* Faking a guru meditation is the best I can think of doing here... */
864	pState->mptrConsole->setMachineState(MachineState_Stuck);
865	}
866	break;
867	}
868	}
869	}
870	autoLock.leave();
871
872	/*
873	* Cleanup.
874	*/
875	Assert(pState->mhSocket == NIL_RTSOCKET);
876	delete pState;
877
878	return VINF_SUCCESS; /* ignored */
879	}
880
881
882	/**
883	* Start teleporter to the specified target.
884	*
885	* @returns COM status code.
886	*
887	* @param aHostname The name of the target host.
888	* @param aPort The TCP port number.
889	* @param aPassword The password.
890	* @param aMaxDowntime Max allowed "downtime" in milliseconds.
891	* @param aProgress Where to return the progress object.
892	*/
893	STDMETHODIMP
894	Console::Teleport(IN_BSTR aHostname, ULONG aPort, IN_BSTR aPassword, ULONG aMaxDowntime, IProgress **aProgress)
895	{
896	/*
897	* Validate parameters, check+hold object status, write lock the object
898	* and validate the state.
899	*/
900	CheckComArgOutPointerValid(aProgress);
901	CheckComArgStrNotEmptyOrNull(aHostname);
902	CheckComArgStrNotEmptyOrNull(aHostname);
903	CheckComArgExprMsg(aPort, aPort > 0 && aPort <= 65535, ("is %u", aPort));
904	CheckComArgExprMsg(aMaxDowntime, aMaxDowntime > 0, ("is %u", aMaxDowntime));
905
906	AutoCaller autoCaller(this);
907	if (FAILED(autoCaller.rc())) return autoCaller.rc();
908
909	AutoWriteLock autoLock(this COMMA_LOCKVAL_SRC_POS);
910	LogFlowThisFunc(("mMachineState=%d\n", mMachineState));
911
912	switch (mMachineState)
913	{
914	case MachineState_Running:
915	case MachineState_Paused:
916	break;
917
918	default:
919	return setError(VBOX_E_INVALID_VM_STATE,
920	tr("Invalid machine state: %s (must be Running or Paused)"),
921	Global::stringifyMachineState(mMachineState));
922	}
923
924
925	/*
926	* Create a progress object, spawn a worker thread and change the state.
927	* Note! The thread won't start working until we release the lock.
928	*/
929	LogFlowThisFunc(("Initiating TELEPORT request...\n"));
930
931	ComObjPtr<Progress> ptrProgress;
932	HRESULT hrc = ptrProgress.createObject();
933	if (FAILED(hrc)) return hrc;
934	hrc = ptrProgress->init(static_cast<IConsole >(this), Bstr(tr("Teleporter")), TRUE /aCancelable*/);
935	if (FAILED(hrc)) return hrc;
936
937	TeleporterStateSrc *pState = new TeleporterStateSrc(this, mpVM, ptrProgress, mMachineState);
938	pState->mstrPassword = aPassword;
939	pState->mstrHostname = aHostname;
940	pState->muPort = aPort;
941	pState->mcMsMaxDowntime = aMaxDowntime;
942
943	void pvUser = static_cast<void >(static_cast<TeleporterState *>(pState));
944	ptrProgress->setCancelCallback(teleporterProgressCancelCallback, pvUser);
945
946	int vrc = RTThreadCreate(NULL, Console::teleporterSrcThreadWrapper, (void )pState, 0 /cbStack*/,
947	RTTHREADTYPE_EMULATION, 0 /fFlags/, "Teleport");
948	if (RT_SUCCESS(vrc))
949	{
950	if (mMachineState == MachineState_Running)
951	hrc = setMachineState(MachineState_Teleporting);
952	else
953	hrc = setMachineState(MachineState_TeleportingPausedVM);
954	if (SUCCEEDED(hrc))
955	{
956	ptrProgress.queryInterfaceTo(aProgress);
957	mptrCancelableProgress = ptrProgress;
958	}
959	else
960	ptrProgress->Cancel();
961	}
962	else
963	{
964	ptrProgress->setCancelCallback(NULL, NULL);
965	delete pState;
966	hrc = setError(E_FAIL, tr("RTThreadCreate -> %Rrc"), vrc);
967	}
968
969	return hrc;
970	}
971
972
973	/**
974	* Creates a TCP server that listens for the source machine and passes control
975	* over to Console::teleporterTrgServeConnection().
976	*
977	* @returns VBox status code.
978	* @param pVM The VM handle
979	* @param pMachine The IMachine for the virtual machine.
980	* @param fStartPaused Whether to start it in the Paused (true) or
981	* Running (false) state,
982	* @param pProgress Pointer to the progress object.
983	*
984	* @remarks The caller expects error information to be set on failure.
985	* @todo Check that all the possible failure paths sets error info...
986	*/
987	int
988	Console::teleporterTrg(PVM pVM, IMachine pMachine, bool fStartPaused, Progress pProgress)
989	{
990	/*
991	* Get the config.
992	*/
993	ULONG uPort;
994	HRESULT hrc = pMachine->COMGETTER(TeleporterPort)(&uPort);
995	if (FAILED(hrc))
996	return VERR_GENERAL_FAILURE;
997	ULONG const uPortOrg = uPort;
998
999	Bstr bstrAddress;
1000	hrc = pMachine->COMGETTER(TeleporterAddress)(bstrAddress.asOutParam());
1001	if (FAILED(hrc))
1002	return VERR_GENERAL_FAILURE;
1003	Utf8Str strAddress(bstrAddress);
1004	const char *pszAddress = strAddress.isEmpty() ? NULL : strAddress.c_str();
1005
1006	Bstr bstrPassword;
1007	hrc = pMachine->COMGETTER(TeleporterPassword)(bstrPassword.asOutParam());
1008	if (FAILED(hrc))
1009	return VERR_GENERAL_FAILURE;
1010	Utf8Str strPassword(bstrPassword);
1011	strPassword.append('\n'); /* To simplify password checking. */
1012
1013	/*
1014	* Create the TCP server.
1015	*/
1016	int vrc;
1017	PRTTCPSERVER hServer;
1018	if (uPort)
1019	vrc = RTTcpServerCreateEx(pszAddress, uPort, &hServer);
1020	else
1021	{
1022	for (int cTries = 10240; cTries > 0; cTries--)
1023	{
1024	uPort = RTRandU32Ex(cTries >= 8192 ? 49152 : 1024, 65534);
1025	vrc = RTTcpServerCreateEx(pszAddress, uPort, &hServer);
1026	if (vrc != VERR_NET_ADDRESS_IN_USE)
1027	break;
1028	}
1029	if (RT_SUCCESS(vrc))
1030	{
1031	hrc = pMachine->COMSETTER(TeleporterPort)(uPort);
1032	if (FAILED(hrc))
1033	{
1034	RTTcpServerDestroy(hServer);
1035	return VERR_GENERAL_FAILURE;
1036	}
1037	}
1038	}
1039	if (RT_FAILURE(vrc))
1040	return vrc;
1041
1042	/*
1043	* Create a one-shot timer for timing out after 5 mins.
1044	*/
1045	RTTIMERLR hTimerLR;
1046	vrc = RTTimerLRCreateEx(&hTimerLR, 0 /ns/, RTTIMER_FLAGS_CPU_ANY, teleporterDstTimeout, hServer);
1047	if (RT_SUCCESS(vrc))
1048	{
1049	vrc = RTTimerLRStart(hTimerLR, 560UINT64_C(1000000000) /ns/);
1050	if (RT_SUCCESS(vrc))
1051	{
1052	/*
1053	* Do the job, when it returns we're done.
1054	*/
1055	TeleporterStateTrg theState(this, pVM, pProgress, pMachine, mControl, &hTimerLR, fStartPaused);
1056	theState.mstrPassword = strPassword;
1057	theState.mhServer = hServer;
1058
1059	void pvUser = static_cast<void >(static_cast<TeleporterState *>(&theState));
1060	if (pProgress->setCancelCallback(teleporterProgressCancelCallback, pvUser))
1061	{
1062	LogRel(("Teleporter: Waiting for incoming VM...\n"));
1063	vrc = RTTcpServerListen(hServer, Console::teleporterTrgServeConnection, &theState);
1064	pProgress->setCancelCallback(NULL, NULL);
1065
1066	bool fPowerOff = false;
1067	if (vrc == VERR_TCP_SERVER_STOP)
1068	{
1069	vrc = theState.mRc;
1070	/* Power off the VM on failure unless the state callback
1071	already did that. */
1072	if (RT_FAILURE(vrc))
1073	{
1074	VMSTATE enmVMState = VMR3GetState(pVM);
1075	if ( enmVMState != VMSTATE_OFF
1076	&& enmVMState != VMSTATE_POWERING_OFF)
1077	fPowerOff = true;
1078	}
1079	}
1080	else if (vrc == VERR_TCP_SERVER_SHUTDOWN)
1081	{
1082	BOOL fCancelled = TRUE;
1083	hrc = pProgress->COMGETTER(Canceled)(&fCancelled);
1084	if (FAILED(hrc) \|\| fCancelled)
1085	{
1086	setError(E_FAIL, tr("Teleporting canceled"));
1087	vrc = VERR_SSM_CANCELLED;
1088	}
1089	else
1090	{
1091	setError(E_FAIL, tr("Teleporter timed out waiting for incoming connection"));
1092	vrc = VERR_TIMEOUT;
1093	}
1094	LogRel(("Teleporter: RTTcpServerListen aborted - %Rrc\n", vrc));
1095	fPowerOff = true;
1096	}
1097	else
1098	{
1099	LogRel(("Teleporter: Unexpected RTTcpServerListen rc: %Rrc\n", vrc));
1100	vrc = VERR_IPE_UNEXPECTED_STATUS;
1101	fPowerOff = true;
1102	}
1103
1104	if (fPowerOff)
1105	{
1106	int vrc2 = VMR3PowerOff(pVM);
1107	AssertRC(vrc2);
1108	}
1109	}
1110	else
1111	vrc = VERR_SSM_CANCELLED;
1112	}
1113
1114	RTTimerLRDestroy(hTimerLR);
1115	}
1116	RTTcpServerDestroy(hServer);
1117
1118	/*
1119	* If we change TeleporterPort above, set it back to it's original
1120	* value before returning.
1121	*/
1122	if (uPortOrg != uPort)
1123	pMachine->COMSETTER(TeleporterPort)(uPortOrg);
1124
1125	return vrc;
1126	}
1127
1128
1129	/**
1130	* Unlock the media.
1131	*
1132	* This is used in error paths.
1133	*
1134	* @param pState The teleporter state.
1135	*/
1136	static void teleporterTrgUnlockMedia(TeleporterStateTrg *pState)
1137	{
1138	if (pState->mfLockedMedia)
1139	{
1140	pState->mpControl->UnlockMedia();
1141	pState->mfLockedMedia = false;
1142	}
1143	}
1144
1145
1146	static int teleporterTcpWriteACK(TeleporterStateTrg *pState, bool fAutomaticUnlock = true)
1147	{
1148	int rc = RTTcpWrite(pState->mhSocket, "ACK\n", sizeof("ACK\n") - 1);
1149	if (RT_FAILURE(rc))
1150	{
1151	LogRel(("Teleporter: RTTcpWrite(,ACK,) -> %Rrc\n", rc));
1152	if (fAutomaticUnlock)
1153	teleporterTrgUnlockMedia(pState);
1154	}
1155	RTTcpFlush(pState->mhSocket);
1156	return rc;
1157	}
1158
1159
1160	static int teleporterTcpWriteNACK(TeleporterStateTrg *pState, int32_t rc2)
1161	{
1162	/*
1163	* Unlock media sending the NACK. That way the other doesn't have to spin
1164	* waiting to regain the locks.
1165	*/
1166	teleporterTrgUnlockMedia(pState);
1167
1168	char szMsg[64];
1169	size_t cch = RTStrPrintf(szMsg, sizeof(szMsg), "NACK=%d\n", rc2);
1170	int rc = RTTcpWrite(pState->mhSocket, szMsg, cch);
1171	if (RT_FAILURE(rc))
1172	LogRel(("Teleporter: RTTcpWrite(,%s,%zu) -> %Rrc\n", szMsg, cch, rc));
1173	RTTcpFlush(pState->mhSocket);
1174	return rc;
1175	}
1176
1177
1178	/**
1179	* @copydoc FNRTTCPSERVE
1180	*
1181	* @returns VINF_SUCCESS or VERR_TCP_SERVER_STOP.
1182	*/
1183	/static/ DECLCALLBACK(int)
1184	Console::teleporterTrgServeConnection(RTSOCKET Sock, void *pvUser)
1185	{
1186	TeleporterStateTrg pState = (TeleporterStateTrg )pvUser;
1187	pState->mhSocket = Sock;
1188
1189	/*
1190	* Say hello.
1191	*/
1192	int vrc = RTTcpWrite(Sock, g_szWelcome, sizeof(g_szWelcome) - 1);
1193	if (RT_FAILURE(vrc))
1194	{
1195	LogRel(("Teleporter: Failed to write welcome message: %Rrc\n", vrc));
1196	return VINF_SUCCESS;
1197	}
1198
1199	/*
1200	* Password (includes '\n', see teleporterTrg).
1201	*/
1202	const char *pszPassword = pState->mstrPassword.c_str();
1203	unsigned off = 0;
1204	while (pszPassword[off])
1205	{
1206	char ch;
1207	vrc = RTTcpRead(Sock, &ch, sizeof(ch), NULL);
1208	if ( RT_FAILURE(vrc)
1209	\|\| pszPassword[off] != ch)
1210	{
1211	if (RT_FAILURE(vrc))
1212	LogRel(("Teleporter: Password read failure (off=%u): %Rrc\n", off, vrc));
1213	else
1214	LogRel(("Teleporter: Invalid password (off=%u)\n", off));
1215	teleporterTcpWriteNACK(pState, VERR_AUTHENTICATION_FAILURE);
1216	return VINF_SUCCESS;
1217	}
1218	off++;
1219	}
1220	vrc = teleporterTcpWriteACK(pState);
1221	if (RT_FAILURE(vrc))
1222	return VINF_SUCCESS;
1223	LogRel(("Teleporter: Incoming VM!\n"));
1224
1225	/*
1226	* Stop the server and cancel the timeout timer.
1227	*
1228	* Note! After this point we must return VERR_TCP_SERVER_STOP, while prior
1229	* to it we must not return that value!
1230	*/
1231	RTTcpServerShutdown(pState->mhServer);
1232	RTTimerLRDestroy(*pState->mphTimerLR);
1233	*pState->mphTimerLR = NIL_RTTIMERLR;
1234
1235	/*
1236	* Command processing loop.
1237	*/
1238	bool fDone = false;
1239	for (;;)
1240	{
1241	char szCmd[128];
1242	vrc = teleporterTcpReadLine(pState, szCmd, sizeof(szCmd));
1243	if (RT_FAILURE(vrc))
1244	break;
1245
1246	if (!strcmp(szCmd, "load"))
1247	{
1248	vrc = teleporterTcpWriteACK(pState);
1249	if (RT_FAILURE(vrc))
1250	break;
1251
1252	RTSocketRetain(pState->mhSocket); /* For concurrent access by I/O thread and EMT. */
1253	pState->moffStream = 0;
1254	void pvUser2 = static_cast<void >(static_cast<TeleporterState *>(pState));
1255	vrc = VMR3LoadFromStream(pState->mpVM, &g_teleporterTcpOps, pvUser2,
1256	teleporterProgressCallback, pvUser2);
1257	RTSocketRelease(pState->mhSocket);
1258	if (RT_FAILURE(vrc))
1259	{
1260	LogRel(("Teleporter: VMR3LoadFromStream -> %Rrc\n", vrc));
1261	teleporterTcpWriteNACK(pState, vrc);
1262	break;
1263	}
1264
1265	/* The EOS might not have been read, make sure it is. */
1266	pState->mfStopReading = false;
1267	size_t cbRead;
1268	vrc = teleporterTcpOpRead(pvUser2, pState->moffStream, szCmd, 1, &cbRead);
1269	if (vrc != VERR_EOF)
1270	{
1271	LogRel(("Teleporter: Draining teleporterTcpOpRead -> %Rrc\n", vrc));
1272	teleporterTcpWriteNACK(pState, vrc);
1273	break;
1274	}
1275
1276	vrc = teleporterTcpWriteACK(pState);
1277	}
1278	else if (!strcmp(szCmd, "cancel"))
1279	{
1280	/* Don't ACK this. */
1281	LogRel(("Teleporter: Received cancel command.\n"));
1282	vrc = VERR_SSM_CANCELLED;
1283	}
1284	else if (!strcmp(szCmd, "lock-media"))
1285	{
1286	HRESULT hrc = pState->mpControl->LockMedia();
1287	if (SUCCEEDED(hrc))
1288	{
1289	pState->mfLockedMedia = true;
1290	vrc = teleporterTcpWriteACK(pState);
1291	}
1292	else
1293	{
1294	vrc = VERR_FILE_LOCK_FAILED;
1295	teleporterTcpWriteNACK(pState, vrc);
1296	}
1297	}
1298	else if ( !strcmp(szCmd, "hand-over-resume")
1299	\|\| !strcmp(szCmd, "hand-over-paused"))
1300	{
1301	/*
1302	* Point of no return.
1303	*
1304	* Note! Since we cannot tell whether a VMR3Resume failure is
1305	* destructive for the source or not, we have little choice
1306	* but to ACK it first and take any failures locally.
1307	*
1308	* Ideally, we should try resume it first and then ACK (or
1309	* NACK) the request since this would reduce latency and
1310	* make it possible to recover from some VMR3Resume failures.
1311	*/
1312	if ( pState->mptrProgress->notifyPointOfNoReturn()
1313	&& pState->mfLockedMedia)
1314	{
1315	vrc = teleporterTcpWriteACK(pState);
1316	if (RT_SUCCESS(vrc))
1317	{
1318	if (!strcmp(szCmd, "hand-over-resume"))
1319	vrc = VMR3Resume(pState->mpVM);
1320	else
1321	pState->mptrConsole->setMachineState(MachineState_Paused);
1322	fDone = true;
1323	break;
1324	}
1325	}
1326	else
1327	{
1328	vrc = pState->mfLockedMedia ? VERR_WRONG_ORDER : VERR_SSM_CANCELLED;
1329	teleporterTcpWriteNACK(pState, vrc);
1330	}
1331	}
1332	else
1333	{
1334	LogRel(("Teleporter: Unknown command '%s' (%.*Rhxs)\n", szCmd, strlen(szCmd), szCmd));
1335	vrc = VERR_NOT_IMPLEMENTED;
1336	teleporterTcpWriteNACK(pState, vrc);
1337	}
1338
1339	if (RT_FAILURE(vrc))
1340	break;
1341	}
1342
1343	if (RT_SUCCESS(vrc) && !fDone)
1344	vrc = VERR_WRONG_ORDER;
1345	if (RT_FAILURE(vrc))
1346	teleporterTrgUnlockMedia(pState);
1347
1348	pState->mRc = vrc;
1349	pState->mhSocket = NIL_RTSOCKET;
1350	LogFlowFunc(("returns mRc=%Rrc\n", vrc));
1351	return VERR_TCP_SERVER_STOP;
1352	}
1353

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source: vbox/trunk/src/VBox/Main/ConsoleImplTeleporter.cpp@ 28965

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