ConsoleImplTeleporter.cpp@ 28675

Last change on this file since 28675 was 26753, checked in by vboxsync, 15 years ago
Main: Bstr makeover (third attempt) -- make Bstr(NULL) and Bstr() behave the same; resulting cleanup; make some more internal methods use Utf8Str instead of Bstr; fix a lot of CheckComArgNotNull??() usage
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1	/* $Id: ConsoleImplTeleporter.cpp 26753 2010-02-24 16:24:33Z 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 "ProgressImpl.h"
29
30	#include "AutoCaller.h"
31	#include "Logging.h"
32
33	#include <iprt/err.h>
34	#include <iprt/rand.h>
35	#include <iprt/tcp.h>
36	#include <iprt/timer.h>
37
38	#include <VBox/vmapi.h>
39	#include <VBox/ssm.h>
40	#include <VBox/err.h>
41	#include <VBox/version.h>
42	#include <VBox/com/string.h>
43
44
45	/*******************************************************************************
46	* Structures and Typedefs *
47	*******************************************************************************/
48	/**
49	* Base class for the teleporter state.
50	*
51	* These classes are used as advanced structs, not as proper classes.
52	*/
53	class TeleporterState
54	{
55	public:
56	ComPtr<Console> mptrConsole;
57	PVM mpVM;
58	ComObjPtr<Progress> mptrProgress;
59	Utf8Str mstrPassword;
60	bool const mfIsSource;
61
62	/** @name stream stuff
63	* @{ */
64	RTSOCKET mhSocket;
65	uint64_t moffStream;
66	uint32_t mcbReadBlock;
67	bool volatile mfStopReading;
68	bool volatile mfEndOfStream;
69	bool volatile mfIOError;
70	/** @} */
71
72	TeleporterState(Console pConsole, PVM pVM, Progress pProgress, bool fIsSource)
73	: mptrConsole(pConsole)
74	, mpVM(pVM)
75	, mptrProgress(pProgress)
76	, mfIsSource(fIsSource)
77	, mhSocket(NIL_RTSOCKET)
78	, moffStream(UINT64_MAX / 2)
79	, mcbReadBlock(0)
80	, mfStopReading(false)
81	, mfEndOfStream(false)
82	, mfIOError(false)
83	{
84	}
85	};
86
87
88	/**
89	* Teleporter state used by the source side.
90	*/
91	class TeleporterStateSrc : public TeleporterState
92	{
93	public:
94	Utf8Str mstrHostname;
95	uint32_t muPort;
96	uint32_t mcMsMaxDowntime;
97	MachineState_T menmOldMachineState;
98	bool mfSuspendedByUs;
99	bool mfUnlockedMedia;
100
101	TeleporterStateSrc(Console pConsole, PVM pVM, Progress pProgress, MachineState_T enmOldMachineState)
102	: TeleporterState(pConsole, pVM, pProgress, true /fIsSource/)
103	, muPort(UINT32_MAX)
104	, mcMsMaxDowntime(250)
105	, menmOldMachineState(enmOldMachineState)
106	, mfSuspendedByUs(false)
107	, mfUnlockedMedia(false)
108	{
109	}
110	};
111
112
113	/**
114	* Teleporter state used by the destiation side.
115	*/
116	class TeleporterStateTrg : public TeleporterState
117	{
118	public:
119	IMachine *mpMachine;
120	IInternalMachineControl *mpControl;
121	PRTTCPSERVER mhServer;
122	PRTTIMERLR mphTimerLR;
123	bool mfLockedMedia;
124	int mRc;
125
126	TeleporterStateTrg(Console pConsole, PVM pVM, Progress pProgress,
127	IMachine pMachine, IInternalMachineControl pControl,
128	PRTTIMERLR phTimerLR, bool fStartPaused)
129	: TeleporterState(pConsole, pVM, pProgress, false /fIsSource/)
130	, mpMachine(pMachine)
131	, mpControl(pControl)
132	, mhServer(NULL)
133	, mphTimerLR(phTimerLR)
134	, mfLockedMedia(false)
135	, mRc(VINF_SUCCESS)
136	{
137	}
138	};
139
140
141	/**
142	* TCP stream header.
143	*
144	* This is an extra layer for fixing the problem with figuring out when the SSM
145	* stream ends.
146	*/
147	typedef struct TELEPORTERTCPHDR
148	{
149	/** Magic value. */
150	uint32_t u32Magic;
151	/** The size of the data block following this header.
152	* 0 indicates the end of the stream, while UINT32_MAX indicates
153	* cancelation. */
154	uint32_t cb;
155	} TELEPORTERTCPHDR;
156	/** Magic value for TELEPORTERTCPHDR::u32Magic. (Egberto Gismonti Amin) */
157	#define TELEPORTERTCPHDR_MAGIC UINT32_C(0x19471205)
158	/** The max block size. */
159	#define TELEPORTERTCPHDR_MAX_SIZE UINT32_C(0x00fffff8)
160
161
162	/*******************************************************************************
163	* Global Variables *
164	*******************************************************************************/
165	static const char g_szWelcome[] = "VirtualBox-Teleporter-1.0\n";
166
167
168	/**
169	* Reads a string from the socket.
170	*
171	* @returns VBox status code.
172	*
173	* @param pState The teleporter state structure.
174	* @param pszBuf The output buffer.
175	* @param cchBuf The size of the output buffer.
176	*
177	*/
178	static int teleporterTcpReadLine(TeleporterState pState, char pszBuf, size_t cchBuf)
179	{
180	char *pszStart = pszBuf;
181	RTSOCKET Sock = pState->mhSocket;
182
183	AssertReturn(cchBuf > 1, VERR_INTERNAL_ERROR);
184	*pszBuf = '\0';
185
186	/* dead simple approach. */
187	for (;;)
188	{
189	char ch;
190	int rc = RTTcpRead(Sock, &ch, sizeof(ch), NULL);
191	if (RT_FAILURE(rc))
192	{
193	LogRel(("Teleporter: RTTcpRead -> %Rrc while reading string ('%s')\n", rc, pszStart));
194	return rc;
195	}
196	if ( ch == '\n'
197	\|\| ch == '\0')
198	return VINF_SUCCESS;
199	if (cchBuf <= 1)
200	{
201	LogRel(("Teleporter: String buffer overflow: '%s'\n", pszStart));
202	return VERR_BUFFER_OVERFLOW;
203	}
204	*pszBuf++ = ch;
205	*pszBuf = '\0';
206	cchBuf--;
207	}
208	}
209
210
211	/**
212	* Reads an ACK or NACK.
213	*
214	* @returns S_OK on ACK, E_FAIL+setError() on failure or NACK.
215	* @param pState The teleporter source state.
216	* @param pszWhich Which ACK is this this?
217	* @param pszNAckMsg Optional NACK message.
218	*
219	* @remarks the setError laziness forces this to be a Console member.
220	*/
221	HRESULT
222	Console::teleporterSrcReadACK(TeleporterStateSrc pState, const char pszWhich,
223	const char pszNAckMsg /= NULL*/)
224	{
225	char szMsg[128];
226	int vrc = teleporterTcpReadLine(pState, szMsg, sizeof(szMsg));
227	if (RT_FAILURE(vrc))
228	return setError(E_FAIL, tr("Failed reading ACK(%s): %Rrc"), pszWhich, vrc);
229	if (strcmp(szMsg, "ACK"))
230	{
231	if (!strncmp(szMsg, "NACK=", sizeof("NACK=") - 1))
232	{
233	int32_t vrc2;
234	vrc = RTStrToInt32Full(&szMsg[sizeof("NACK=") - 1], 10, &vrc2);
235	if (vrc == VINF_SUCCESS)
236	{
237	if (pszNAckMsg)
238	{
239	LogRel(("Teleporter: %s: NACK=%Rrc (%d)\n", pszWhich, vrc2, vrc2));
240	return setError(E_FAIL, pszNAckMsg);
241	}
242	return setError(E_FAIL, "NACK(%s) - %Rrc (%d)", pszWhich, vrc2, vrc2);
243	}
244	}
245	return setError(E_FAIL, tr("%s: Expected ACK or NACK, got '%s'"), pszWhich, szMsg);
246	}
247	return S_OK;
248	}
249
250
251	/**
252	* Submitts a command to the destination and waits for the ACK.
253	*
254	* @returns S_OK on ACKed command, E_FAIL+setError() on failure.
255	*
256	* @param pState The teleporter source state.
257	* @param pszCommand The command.
258	* @param fWaitForAck Whether to wait for the ACK.
259	*
260	* @remarks the setError laziness forces this to be a Console member.
261	*/
262	HRESULT
263	Console::teleporterSrcSubmitCommand(TeleporterStateSrc pState, const char pszCommand, bool fWaitForAck /= true/)
264	{
265	size_t cchCommand = strlen(pszCommand);
266	int vrc = RTTcpWrite(pState->mhSocket, pszCommand, cchCommand);
267	if (RT_SUCCESS(vrc))
268	vrc = RTTcpWrite(pState->mhSocket, "\n", sizeof("\n") - 1);
269	if (RT_SUCCESS(vrc))
270	vrc = RTTcpFlush(pState->mhSocket);
271	if (RT_FAILURE(vrc))
272	return setError(E_FAIL, tr("Failed writing command '%s': %Rrc"), pszCommand, vrc);
273	if (!fWaitForAck)
274	return S_OK;
275	return teleporterSrcReadACK(pState, pszCommand);
276	}
277
278
279	/**
280	* @copydoc SSMSTRMOPS::pfnWrite
281	*/
282	static DECLCALLBACK(int) teleporterTcpOpWrite(void pvUser, uint64_t offStream, const void pvBuf, size_t cbToWrite)
283	{
284	TeleporterState pState = (TeleporterState )pvUser;
285
286	AssertReturn(cbToWrite > 0, VINF_SUCCESS);
287	AssertReturn(cbToWrite < UINT32_MAX, VERR_OUT_OF_RANGE);
288	AssertReturn(pState->mfIsSource, VERR_INVALID_HANDLE);
289
290	for (;;)
291	{
292	/* Write block header. */
293	TELEPORTERTCPHDR Hdr;
294	Hdr.u32Magic = TELEPORTERTCPHDR_MAGIC;
295	Hdr.cb = RT_MIN((uint32_t)cbToWrite, TELEPORTERTCPHDR_MAX_SIZE);
296	int rc = RTTcpWrite(pState->mhSocket, &Hdr, sizeof(Hdr));
297	if (RT_FAILURE(rc))
298	{
299	LogRel(("Teleporter/TCP: Header write error: %Rrc\n", rc));
300	return rc;
301	}
302
303	/* Write the data. */
304	rc = RTTcpWrite(pState->mhSocket, pvBuf, Hdr.cb);
305	if (RT_FAILURE(rc))
306	{
307	LogRel(("Teleporter/TCP: Data write error: %Rrc (cb=%#x)\n", rc, Hdr.cb));
308	return rc;
309	}
310	pState->moffStream += Hdr.cb;
311	if (Hdr.cb == cbToWrite)
312	return VINF_SUCCESS;
313
314	/* advance */
315	cbToWrite -= Hdr.cb;
316	pvBuf = (uint8_t const *)pvBuf + Hdr.cb;
317	}
318	}
319
320
321	/**
322	* Selects and poll for close condition.
323	*
324	* We can use a relatively high poll timeout here since it's only used to get
325	* us out of error paths. In the normal cause of events, we'll get a
326	* end-of-stream header.
327	*
328	* @returns VBox status code.
329	*
330	* @param pState The teleporter state data.
331	*/
332	static int teleporterTcpReadSelect(TeleporterState *pState)
333	{
334	int rc;
335	do
336	{
337	rc = RTTcpSelectOne(pState->mhSocket, 1000);
338	if (RT_FAILURE(rc) && rc != VERR_TIMEOUT)
339	{
340	pState->mfIOError = true;
341	LogRel(("Teleporter/TCP: Header select error: %Rrc\n", rc));
342	break;
343	}
344	if (pState->mfStopReading)
345	{
346	rc = VERR_EOF;
347	break;
348	}
349	} while (rc == VERR_TIMEOUT);
350	return rc;
351	}
352
353
354	/**
355	* @copydoc SSMSTRMOPS::pfnRead
356	*/
357	static DECLCALLBACK(int) teleporterTcpOpRead(void pvUser, uint64_t offStream, void pvBuf, size_t cbToRead, size_t *pcbRead)
358	{
359	TeleporterState pState = (TeleporterState )pvUser;
360	AssertReturn(!pState->mfIsSource, VERR_INVALID_HANDLE);
361
362	for (;;)
363	{
364	int rc;
365
366	/*
367	* Check for various conditions and may have been signalled.
368	*/
369	if (pState->mfEndOfStream)
370	return VERR_EOF;
371	if (pState->mfStopReading)
372	return VERR_EOF;
373	if (pState->mfIOError)
374	return VERR_IO_GEN_FAILURE;
375
376	/*
377	* If there is no more data in the current block, read the next
378	* block header.
379	*/
380	if (!pState->mcbReadBlock)
381	{
382	rc = teleporterTcpReadSelect(pState);
383	if (RT_FAILURE(rc))
384	return rc;
385	TELEPORTERTCPHDR Hdr;
386	rc = RTTcpRead(pState->mhSocket, &Hdr, sizeof(Hdr), NULL);
387	if (RT_FAILURE(rc))
388	{
389	pState->mfIOError = true;
390	LogRel(("Teleporter/TCP: Header read error: %Rrc\n", rc));
391	return rc;
392	}
393
394	if (RT_UNLIKELY( Hdr.u32Magic != TELEPORTERTCPHDR_MAGIC
395	\|\| Hdr.cb > TELEPORTERTCPHDR_MAX_SIZE
396	\|\| Hdr.cb == 0))
397	{
398	if ( Hdr.u32Magic == TELEPORTERTCPHDR_MAGIC
399	&& ( Hdr.cb == 0
400	\|\| Hdr.cb == UINT32_MAX)
401	)
402	{
403	pState->mfEndOfStream = true;
404	pState->mcbReadBlock = 0;
405	return Hdr.cb ? VERR_SSM_CANCELLED : VERR_EOF;
406	}
407	pState->mfIOError = true;
408	LogRel(("Teleporter/TCP: Invalid block: u32Magic=%#x cb=%#x\n", Hdr.u32Magic, Hdr.cb));
409	return VERR_IO_GEN_FAILURE;
410	}
411
412	pState->mcbReadBlock = Hdr.cb;
413	if (pState->mfStopReading)
414	return VERR_EOF;
415	}
416
417	/*
418	* Read more data.
419	*/
420	rc = teleporterTcpReadSelect(pState);
421	if (RT_FAILURE(rc))
422	return rc;
423	uint32_t cb = (uint32_t)RT_MIN(pState->mcbReadBlock, cbToRead);
424	rc = RTTcpRead(pState->mhSocket, pvBuf, cb, pcbRead);
425	if (RT_FAILURE(rc))
426	{
427	pState->mfIOError = true;
428	LogRel(("Teleporter/TCP: Data read error: %Rrc (cb=%#x)\n", rc, cb));
429	return rc;
430	}
431	if (pcbRead)
432	{
433	cb = (uint32_t)*pcbRead;
434	pState->moffStream += cb;
435	pState->mcbReadBlock -= cb;
436	return VINF_SUCCESS;
437	}
438	pState->moffStream += cb;
439	pState->mcbReadBlock -= cb;
440	if (cbToRead == cb)
441	return VINF_SUCCESS;
442
443	/* Advance to the next block. */
444	cbToRead -= cb;
445	pvBuf = (uint8_t *)pvBuf + cb;
446	}
447	}
448
449
450	/**
451	* @copydoc SSMSTRMOPS::pfnSeek
452	*/
453	static DECLCALLBACK(int) teleporterTcpOpSeek(void pvUser, int64_t offSeek, unsigned uMethod, uint64_t poffActual)
454	{
455	return VERR_NOT_SUPPORTED;
456	}
457
458
459	/**
460	* @copydoc SSMSTRMOPS::pfnTell
461	*/
462	static DECLCALLBACK(uint64_t) teleporterTcpOpTell(void *pvUser)
463	{
464	TeleporterState pState = (TeleporterState )pvUser;
465	return pState->moffStream;
466	}
467
468
469	/**
470	* @copydoc SSMSTRMOPS::pfnSize
471	*/
472	static DECLCALLBACK(int) teleporterTcpOpSize(void pvUser, uint64_t pcb)
473	{
474	return VERR_NOT_SUPPORTED;
475	}
476
477
478	/**
479	* @copydoc SSMSTRMOPS::pfnIsOk
480	*/
481	static DECLCALLBACK(int) teleporterTcpOpIsOk(void *pvUser)
482	{
483	TeleporterState pState = (TeleporterState )pvUser;
484
485	if (pState->mfIsSource)
486	{
487	/* Poll for incoming NACKs and errors from the other side */
488	int rc = RTTcpSelectOne(pState->mhSocket, 0);
489	if (rc != VERR_TIMEOUT)
490	{
491	if (RT_SUCCESS(rc))
492	{
493	LogRel(("Teleporter/TCP: Incoming data detect by IsOk, assuming it is a cancellation NACK.\n"));
494	rc = VERR_SSM_CANCELLED;
495	}
496	else
497	LogRel(("Teleporter/TCP: RTTcpSelectOne -> %Rrc (IsOk).\n", rc));
498	return rc;
499	}
500	}
501
502	return VINF_SUCCESS;
503	}
504
505
506	/**
507	* @copydoc SSMSTRMOPS::pfnClose
508	*/
509	static DECLCALLBACK(int) teleporterTcpOpClose(void *pvUser, bool fCancelled)
510	{
511	TeleporterState pState = (TeleporterState )pvUser;
512
513	if (pState->mfIsSource)
514	{
515	TELEPORTERTCPHDR EofHdr;
516	EofHdr.u32Magic = TELEPORTERTCPHDR_MAGIC;
517	EofHdr.cb = fCancelled ? UINT32_MAX : 0;
518	int rc = RTTcpWrite(pState->mhSocket, &EofHdr, sizeof(EofHdr));
519	if (RT_SUCCESS(rc))
520	rc = RTTcpFlush(pState->mhSocket);
521	if (RT_FAILURE(rc))
522	{
523	LogRel(("Teleporter/TCP: EOF Header write error: %Rrc\n", rc));
524	return rc;
525	}
526	}
527	else
528	{
529	ASMAtomicWriteBool(&pState->mfStopReading, true);
530	RTTcpFlush(pState->mhSocket);
531	}
532
533	return VINF_SUCCESS;
534	}
535
536
537	/**
538	* Method table for a TCP based stream.
539	*/
540	static SSMSTRMOPS const g_teleporterTcpOps =
541	{
542	SSMSTRMOPS_VERSION,
543	teleporterTcpOpWrite,
544	teleporterTcpOpRead,
545	teleporterTcpOpSeek,
546	teleporterTcpOpTell,
547	teleporterTcpOpSize,
548	teleporterTcpOpIsOk,
549	teleporterTcpOpClose,
550	SSMSTRMOPS_VERSION
551	};
552
553
554	/**
555	* Progress cancelation callback.
556	*/
557	static void teleporterProgressCancelCallback(void *pvUser)
558	{
559	TeleporterState pState = (TeleporterState )pvUser;
560	SSMR3Cancel(pState->mpVM);
561	if (!pState->mfIsSource)
562	{
563	TeleporterStateTrg pStateTrg = (TeleporterStateTrg )pState;
564	RTTcpServerShutdown(pStateTrg->mhServer);
565	}
566	}
567
568	/**
569	* @copydoc PFNVMPROGRESS
570	*/
571	static DECLCALLBACK(int) teleporterProgressCallback(PVM pVM, unsigned uPercent, void *pvUser)
572	{
573	TeleporterState pState = (TeleporterState )pvUser;
574	if (pState->mptrProgress)
575	{
576	HRESULT hrc = pState->mptrProgress->SetCurrentOperationProgress(uPercent);
577	if (FAILED(hrc))
578	{
579	/* check if the failure was caused by cancellation. */
580	BOOL fCancelled;
581	hrc = pState->mptrProgress->COMGETTER(Canceled)(&fCancelled);
582	if (SUCCEEDED(hrc) && fCancelled)
583	{
584	SSMR3Cancel(pState->mpVM);
585	return VERR_SSM_CANCELLED;
586	}
587	}
588	}
589
590	return VINF_SUCCESS;
591	}
592
593
594	/**
595	* @copydoc FNRTTIMERLR
596	*/
597	static DECLCALLBACK(void) teleporterDstTimeout(RTTIMERLR hTimerLR, void *pvUser, uint64_t iTick)
598	{
599	/* This is harmless for any open connections. */
600	RTTcpServerShutdown((PRTTCPSERVER)pvUser);
601	}
602
603
604	/**
605	* Do the teleporter.
606	*
607	* @returns VBox status code.
608	* @param pState The teleporter state.
609	*/
610	HRESULT
611	Console::teleporterSrc(TeleporterStateSrc *pState)
612	{
613	AutoCaller autoCaller(this);
614	if (FAILED(autoCaller.rc())) return autoCaller.rc();
615
616	/*
617	* Wait for Console::Teleport to change the state.
618	*/
619	{ AutoWriteLock autoLock(this COMMA_LOCKVAL_SRC_POS); }
620
621	BOOL fCancelled = TRUE;
622	HRESULT hrc = pState->mptrProgress->COMGETTER(Canceled)(&fCancelled);
623	if (FAILED(hrc))
624	return hrc;
625	if (fCancelled)
626	return setError(E_FAIL, tr("cancelled"));
627
628	/*
629	* Try connect to the destination machine.
630	* (Note. The caller cleans up mhSocket, so we can return without worries.)
631	*/
632	int vrc = RTTcpClientConnect(pState->mstrHostname.c_str(), pState->muPort, &pState->mhSocket);
633	if (RT_FAILURE(vrc))
634	return setError(E_FAIL, tr("Failed to connect to port %u on '%s': %Rrc"),
635	pState->muPort, pState->mstrHostname.c_str(), vrc);
636
637	/* Read and check the welcome message. */
638	char szLine[RT_MAX(128, sizeof(g_szWelcome))];
639	RT_ZERO(szLine);
640	vrc = RTTcpRead(pState->mhSocket, szLine, sizeof(g_szWelcome) - 1, NULL);
641	if (RT_FAILURE(vrc))
642	return setError(E_FAIL, tr("Failed to read welcome message: %Rrc"), vrc);
643	if (strcmp(szLine, g_szWelcome))
644	return setError(E_FAIL, tr("Unexpected welcome %.*Rhxs"), sizeof(g_szWelcome) - 1, szLine);
645
646	/* password */
647	pState->mstrPassword.append('\n');
648	vrc = RTTcpWrite(pState->mhSocket, pState->mstrPassword.c_str(), pState->mstrPassword.length());
649	if (RT_FAILURE(vrc))
650	return setError(E_FAIL, tr("Failed to send password: %Rrc"), vrc);
651
652	/* ACK */
653	hrc = teleporterSrcReadACK(pState, "password", tr("Invalid password"));
654	if (FAILED(hrc))
655	return hrc;
656
657	/*
658	* Start loading the state.
659	*
660	* Note! The saved state includes vital configuration data which will be
661	* verified against the VM config on the other end. This is all done
662	* in the first pass, so we should fail pretty promptly on misconfig.
663	*/
664	hrc = teleporterSrcSubmitCommand(pState, "load");
665	if (FAILED(hrc))
666	return hrc;
667
668	void pvUser = static_cast<void >(static_cast<TeleporterState *>(pState));
669	vrc = VMR3Teleport(pState->mpVM, pState->mcMsMaxDowntime,
670	&g_teleporterTcpOps, pvUser,
671	teleporterProgressCallback, pvUser,
672	&pState->mfSuspendedByUs);
673	if (RT_FAILURE(vrc))
674	return setError(E_FAIL, tr("VMR3Teleport -> %Rrc"), vrc);
675
676	hrc = teleporterSrcReadACK(pState, "load-complete");
677	if (FAILED(hrc))
678	return hrc;
679
680	/*
681	* We're at the point of no return.
682	*/
683	if (!pState->mptrProgress->notifyPointOfNoReturn())
684	{
685	teleporterSrcSubmitCommand(pState, "cancel", false /fWaitForAck/);
686	return E_FAIL;
687	}
688
689	/*
690	* Hand over any media which we might be sharing.
691	*
692	* Note! This is only important on localhost teleportations.
693	*/
694	/** @todo Maybe we should only do this if it's a local teleportation... */
695	hrc = mControl->UnlockMedia();
696	if (FAILED(hrc))
697	return hrc;
698	pState->mfUnlockedMedia = true;
699
700	hrc = teleporterSrcSubmitCommand(pState, "lock-media");
701	if (FAILED(hrc))
702	return hrc;
703
704	/*
705	* The FINAL step is giving the target instructions how to proceed with the VM.
706	*/
707	if ( vrc == VINF_SSM_LIVE_SUSPENDED
708	\|\| pState->menmOldMachineState == MachineState_Paused)
709	hrc = teleporterSrcSubmitCommand(pState, "hand-over-paused");
710	else
711	hrc = teleporterSrcSubmitCommand(pState, "hand-over-resume");
712	if (FAILED(hrc))
713	return hrc;
714
715	/*
716	* teleporterSrcThreadWrapper will do the automatic power off because it
717	* has to release the AutoVMCaller.
718	*/
719	return S_OK;
720	}
721
722
723	/**
724	* Static thread method wrapper.
725	*
726	* @returns VINF_SUCCESS (ignored).
727	* @param hThread The thread.
728	* @param pvUser Pointer to a TeleporterStateSrc instance.
729	*/
730	/static/ DECLCALLBACK(int)
731	Console::teleporterSrcThreadWrapper(RTTHREAD hThread, void *pvUser)
732	{
733	TeleporterStateSrc pState = (TeleporterStateSrc )pvUser;
734
735	/*
736	* Console::teleporterSrc does the work, we just grab onto the VM handle
737	* and do the cleanups afterwards.
738	*/
739	AutoVMCaller autoVMCaller(pState->mptrConsole);
740	HRESULT hrc = autoVMCaller.rc();
741
742	if (SUCCEEDED(hrc))
743	hrc = pState->mptrConsole->teleporterSrc(pState);
744
745	/* Close the connection ASAP on so that the other side can complete. */
746	if (pState->mhSocket != NIL_RTSOCKET)
747	{
748	RTTcpClientClose(pState->mhSocket);
749	pState->mhSocket = NIL_RTSOCKET;
750	}
751
752	/* Aaarg! setMachineState trashes error info on Windows, so we have to
753	complete things here on failure instead of right before cleanup. */
754	if (FAILED(hrc))
755	pState->mptrProgress->notifyComplete(hrc);
756
757	/* We can no longer be cancelled (success), or it doesn't matter any longer (failure). */
758	pState->mptrProgress->setCancelCallback(NULL, NULL);
759
760	/*
761	* Write lock the console before resetting mptrCancelableProgress and
762	* fixing the state.
763	*/
764	AutoWriteLock autoLock(pState->mptrConsole COMMA_LOCKVAL_SRC_POS);
765	pState->mptrConsole->mptrCancelableProgress.setNull();
766
767	VMSTATE const enmVMState = VMR3GetState(pState->mpVM);
768	MachineState_T const enmMachineState = pState->mptrConsole->mMachineState;
769	if (SUCCEEDED(hrc))
770	{
771	/*
772	* Automatically shut down the VM on success.
773	*
774	* Note! We have to release the VM caller object or we'll deadlock in
775	* powerDown.
776	*/
777	AssertLogRelMsg(enmVMState == VMSTATE_SUSPENDED, ("%s\n", VMR3GetStateName(enmVMState)));
778	AssertLogRelMsg(enmMachineState == MachineState_TeleportingPausedVM, ("%s\n", Global::stringifyMachineState(enmMachineState)));
779
780	autoVMCaller.release();
781
782	pState->mptrConsole->mVMIsAlreadyPoweringOff = true; /* (Make sure we stick in the TeleportingPausedVM state.) */
783	hrc = pState->mptrConsole->powerDown();
784	pState->mptrConsole->mVMIsAlreadyPoweringOff = false;
785
786	pState->mptrProgress->notifyComplete(hrc);
787	}
788	else
789	{
790	/*
791	* Work the state machinery on failure.
792	*
793	* If the state is no longer 'Teleporting*', some other operation has
794	* canceled us and there is nothing we need to do here. In all other
795	* cases, we've failed one way or another.
796	*/
797	if ( enmMachineState == MachineState_Teleporting
798	\|\| enmMachineState == MachineState_TeleportingPausedVM
799	)
800	{
801	if (pState->mfUnlockedMedia)
802	{
803	ErrorInfoKeeper Oak;
804	HRESULT hrc2 = pState->mptrConsole->mControl->LockMedia();
805	if (FAILED(hrc2))
806	{
807	uint64_t StartMS = RTTimeMilliTS();
808	do
809	{
810	RTThreadSleep(2);
811	hrc2 = pState->mptrConsole->mControl->LockMedia();
812	} while ( FAILED(hrc2)
813	&& RTTimeMilliTS() - StartMS < 2000);
814	}
815	if (SUCCEEDED(hrc2))
816	pState->mfUnlockedMedia = true;
817	else
818	LogRel(("FATAL ERROR: Failed to re-take the media locks. hrc2=%Rhrc\n", hrc2));
819	}
820
821	switch (enmVMState)
822	{
823	case VMSTATE_RUNNING:
824	case VMSTATE_RUNNING_LS:
825	case VMSTATE_DEBUGGING:
826	case VMSTATE_DEBUGGING_LS:
827	case VMSTATE_POWERING_OFF:
828	case VMSTATE_POWERING_OFF_LS:
829	case VMSTATE_RESETTING:
830	case VMSTATE_RESETTING_LS:
831	Assert(!pState->mfSuspendedByUs);
832	Assert(!pState->mfUnlockedMedia);
833	pState->mptrConsole->setMachineState(MachineState_Running);
834	break;
835
836	case VMSTATE_GURU_MEDITATION:
837	case VMSTATE_GURU_MEDITATION_LS:
838	pState->mptrConsole->setMachineState(MachineState_Stuck);
839	break;
840
841	case VMSTATE_FATAL_ERROR:
842	case VMSTATE_FATAL_ERROR_LS:
843	pState->mptrConsole->setMachineState(MachineState_Paused);
844	break;
845
846	default:
847	AssertMsgFailed(("%s\n", VMR3GetStateName(enmVMState)));
848	case VMSTATE_SUSPENDED:
849	case VMSTATE_SUSPENDED_LS:
850	case VMSTATE_SUSPENDING:
851	case VMSTATE_SUSPENDING_LS:
852	case VMSTATE_SUSPENDING_EXT_LS:
853	if (!pState->mfUnlockedMedia)
854	{
855	pState->mptrConsole->setMachineState(MachineState_Paused);
856	if (pState->mfSuspendedByUs)
857	{
858	autoLock.leave();
859	int rc = VMR3Resume(pState->mpVM);
860	AssertLogRelMsgRC(rc, ("VMR3Resume -> %Rrc\n", rc));
861	autoLock.enter();
862	}
863	}
864	else
865	{
866	/* Faking a guru meditation is the best I can think of doing here... */
867	pState->mptrConsole->setMachineState(MachineState_Stuck);
868	}
869	break;
870	}
871	}
872	}
873	autoLock.leave();
874
875	/*
876	* Cleanup.
877	*/
878	Assert(pState->mhSocket == NIL_RTSOCKET);
879	delete pState;
880
881	return VINF_SUCCESS; /* ignored */
882	}
883
884
885	/**
886	* Start teleporter to the specified target.
887	*
888	* @returns COM status code.
889	*
890	* @param aHostname The name of the target host.
891	* @param aPort The TCP port number.
892	* @param aPassword The password.
893	* @param aMaxDowntime Max allowed "downtime" in milliseconds.
894	* @param aProgress Where to return the progress object.
895	*/
896	STDMETHODIMP
897	Console::Teleport(IN_BSTR aHostname, ULONG aPort, IN_BSTR aPassword, ULONG aMaxDowntime, IProgress **aProgress)
898	{
899	/*
900	* Validate parameters, check+hold object status, write lock the object
901	* and validate the state.
902	*/
903	CheckComArgOutPointerValid(aProgress);
904	CheckComArgStrNotEmptyOrNull(aHostname);
905	CheckComArgStrNotEmptyOrNull(aHostname);
906	CheckComArgExprMsg(aPort, aPort > 0 && aPort <= 65535, ("is %u", aPort));
907	CheckComArgExprMsg(aMaxDowntime, aMaxDowntime > 0, ("is %u", aMaxDowntime));
908
909	AutoCaller autoCaller(this);
910	if (FAILED(autoCaller.rc())) return autoCaller.rc();
911
912	AutoWriteLock autoLock(this COMMA_LOCKVAL_SRC_POS);
913	LogFlowThisFunc(("mMachineState=%d\n", mMachineState));
914
915	switch (mMachineState)
916	{
917	case MachineState_Running:
918	case MachineState_Paused:
919	break;
920
921	default:
922	return setError(VBOX_E_INVALID_VM_STATE,
923	tr("Invalid machine state: %s (must be Running or Paused)"),
924	Global::stringifyMachineState(mMachineState));
925	}
926
927
928	/*
929	* Create a progress object, spawn a worker thread and change the state.
930	* Note! The thread won't start working until we release the lock.
931	*/
932	LogFlowThisFunc(("Initiating TELEPORT request...\n"));
933
934	ComObjPtr<Progress> ptrProgress;
935	HRESULT hrc = ptrProgress.createObject();
936	if (FAILED(hrc)) return hrc;
937	hrc = ptrProgress->init(static_cast<IConsole >(this), Bstr(tr("Teleporter")), TRUE /aCancelable*/);
938	if (FAILED(hrc)) return hrc;
939
940	TeleporterStateSrc *pState = new TeleporterStateSrc(this, mpVM, ptrProgress, mMachineState);
941	pState->mstrPassword = aPassword;
942	pState->mstrHostname = aHostname;
943	pState->muPort = aPort;
944	pState->mcMsMaxDowntime = aMaxDowntime;
945
946	void pvUser = static_cast<void >(static_cast<TeleporterState *>(pState));
947	ptrProgress->setCancelCallback(teleporterProgressCancelCallback, pvUser);
948
949	int vrc = RTThreadCreate(NULL, Console::teleporterSrcThreadWrapper, (void )pState, 0 /cbStack*/,
950	RTTHREADTYPE_EMULATION, 0 /fFlags/, "Teleport");
951	if (RT_SUCCESS(vrc))
952	{
953	if (mMachineState == MachineState_Running)
954	hrc = setMachineState(MachineState_Teleporting);
955	else
956	hrc = setMachineState(MachineState_TeleportingPausedVM);
957	if (SUCCEEDED(hrc))
958	{
959	ptrProgress.queryInterfaceTo(aProgress);
960	mptrCancelableProgress = ptrProgress;
961	}
962	else
963	ptrProgress->Cancel();
964	}
965	else
966	{
967	ptrProgress->setCancelCallback(NULL, NULL);
968	delete pState;
969	hrc = setError(E_FAIL, tr("RTThreadCreate -> %Rrc"), vrc);
970	}
971
972	return hrc;
973	}
974
975
976	/**
977	* Creates a TCP server that listens for the source machine and passes control
978	* over to Console::teleporterTrgServeConnection().
979	*
980	* @returns VBox status code.
981	* @param pVM The VM handle
982	* @param pMachine The IMachine for the virtual machine.
983	* @param fStartPaused Whether to start it in the Paused (true) or
984	* Running (false) state,
985	* @param pProgress Pointer to the progress object.
986	*
987	* @remarks The caller expects error information to be set on failure.
988	* @todo Check that all the possible failure paths sets error info...
989	*/
990	int
991	Console::teleporterTrg(PVM pVM, IMachine pMachine, bool fStartPaused, Progress pProgress)
992	{
993	/*
994	* Get the config.
995	*/
996	ULONG uPort;
997	HRESULT hrc = pMachine->COMGETTER(TeleporterPort)(&uPort);
998	if (FAILED(hrc))
999	return VERR_GENERAL_FAILURE;
1000	ULONG const uPortOrg = uPort;
1001
1002	Bstr bstrAddress;
1003	hrc = pMachine->COMGETTER(TeleporterAddress)(bstrAddress.asOutParam());
1004	if (FAILED(hrc))
1005	return VERR_GENERAL_FAILURE;
1006	Utf8Str strAddress(bstrAddress);
1007	const char *pszAddress = strAddress.isEmpty() ? NULL : strAddress.c_str();
1008
1009	Bstr bstrPassword;
1010	hrc = pMachine->COMGETTER(TeleporterPassword)(bstrPassword.asOutParam());
1011	if (FAILED(hrc))
1012	return VERR_GENERAL_FAILURE;
1013	Utf8Str strPassword(bstrPassword);
1014	strPassword.append('\n'); /* To simplify password checking. */
1015
1016	/*
1017	* Create the TCP server.
1018	*/
1019	int vrc;
1020	PRTTCPSERVER hServer;
1021	if (uPort)
1022	vrc = RTTcpServerCreateEx(pszAddress, uPort, &hServer);
1023	else
1024	{
1025	for (int cTries = 10240; cTries > 0; cTries--)
1026	{
1027	uPort = RTRandU32Ex(cTries >= 8192 ? 49152 : 1024, 65534);
1028	vrc = RTTcpServerCreateEx(pszAddress, uPort, &hServer);
1029	if (vrc != VERR_NET_ADDRESS_IN_USE)
1030	break;
1031	}
1032	if (RT_SUCCESS(vrc))
1033	{
1034	hrc = pMachine->COMSETTER(TeleporterPort)(uPort);
1035	if (FAILED(hrc))
1036	{
1037	RTTcpServerDestroy(hServer);
1038	return VERR_GENERAL_FAILURE;
1039	}
1040	}
1041	}
1042	if (RT_FAILURE(vrc))
1043	return vrc;
1044
1045	/*
1046	* Create a one-shot timer for timing out after 5 mins.
1047	*/
1048	RTTIMERLR hTimerLR;
1049	vrc = RTTimerLRCreateEx(&hTimerLR, 0 /ns/, RTTIMER_FLAGS_CPU_ANY, teleporterDstTimeout, hServer);
1050	if (RT_SUCCESS(vrc))
1051	{
1052	vrc = RTTimerLRStart(hTimerLR, 560UINT64_C(1000000000) /ns/);
1053	if (RT_SUCCESS(vrc))
1054	{
1055	/*
1056	* Do the job, when it returns we're done.
1057	*/
1058	TeleporterStateTrg theState(this, pVM, pProgress, pMachine, mControl, &hTimerLR, fStartPaused);
1059	theState.mstrPassword = strPassword;
1060	theState.mhServer = hServer;
1061
1062	void pvUser = static_cast<void >(static_cast<TeleporterState *>(&theState));
1063	if (pProgress->setCancelCallback(teleporterProgressCancelCallback, pvUser))
1064	{
1065	LogRel(("Teleporter: Waiting for incoming VM...\n"));
1066	vrc = RTTcpServerListen(hServer, Console::teleporterTrgServeConnection, &theState);
1067	pProgress->setCancelCallback(NULL, NULL);
1068
1069	bool fPowerOff = false;
1070	if (vrc == VERR_TCP_SERVER_STOP)
1071	{
1072	vrc = theState.mRc;
1073	/* Power off the VM on failure unless the state callback
1074	already did that. */
1075	if (RT_FAILURE(vrc))
1076	{
1077	VMSTATE enmVMState = VMR3GetState(pVM);
1078	if ( enmVMState != VMSTATE_OFF
1079	&& enmVMState != VMSTATE_POWERING_OFF)
1080	fPowerOff = true;
1081	}
1082	}
1083	else if (vrc == VERR_TCP_SERVER_SHUTDOWN)
1084	{
1085	BOOL fCancelled = TRUE;
1086	hrc = pProgress->COMGETTER(Canceled)(&fCancelled);
1087	if (FAILED(hrc) \|\| fCancelled)
1088	{
1089	setError(E_FAIL, tr("Teleporting canceled"));
1090	vrc = VERR_SSM_CANCELLED;
1091	}
1092	else
1093	{
1094	setError(E_FAIL, tr("Teleporter timed out waiting for incoming connection"));
1095	vrc = VERR_TIMEOUT;
1096	}
1097	LogRel(("Teleporter: RTTcpServerListen aborted - %Rrc\n", vrc));
1098	fPowerOff = true;
1099	}
1100	else
1101	{
1102	LogRel(("Teleporter: Unexpected RTTcpServerListen rc: %Rrc\n", vrc));
1103	vrc = VERR_IPE_UNEXPECTED_STATUS;
1104	fPowerOff = true;
1105	}
1106
1107	if (fPowerOff)
1108	{
1109	int vrc2 = VMR3PowerOff(pVM);
1110	AssertRC(vrc2);
1111	}
1112	}
1113	else
1114	vrc = VERR_SSM_CANCELLED;
1115	}
1116
1117	RTTimerLRDestroy(hTimerLR);
1118	}
1119	RTTcpServerDestroy(hServer);
1120
1121	/*
1122	* If we change TeleporterPort above, set it back to it's original
1123	* value before returning.
1124	*/
1125	if (uPortOrg != uPort)
1126	pMachine->COMSETTER(TeleporterPort)(uPortOrg);
1127
1128	return vrc;
1129	}
1130
1131
1132	/**
1133	* Unlock the media.
1134	*
1135	* This is used in error paths.
1136	*
1137	* @param pState The teleporter state.
1138	*/
1139	static void teleporterTrgUnlockMedia(TeleporterStateTrg *pState)
1140	{
1141	if (pState->mfLockedMedia)
1142	{
1143	pState->mpControl->UnlockMedia();
1144	pState->mfLockedMedia = false;
1145	}
1146	}
1147
1148
1149	static int teleporterTcpWriteACK(TeleporterStateTrg *pState, bool fAutomaticUnlock = true)
1150	{
1151	int rc = RTTcpWrite(pState->mhSocket, "ACK\n", sizeof("ACK\n") - 1);
1152	if (RT_FAILURE(rc))
1153	{
1154	LogRel(("Teleporter: RTTcpWrite(,ACK,) -> %Rrc\n", rc));
1155	if (fAutomaticUnlock)
1156	teleporterTrgUnlockMedia(pState);
1157	}
1158	RTTcpFlush(pState->mhSocket);
1159	return rc;
1160	}
1161
1162
1163	static int teleporterTcpWriteNACK(TeleporterStateTrg *pState, int32_t rc2)
1164	{
1165	/*
1166	* Unlock media sending the NACK. That way the other doesn't have to spin
1167	* waiting to regain the locks.
1168	*/
1169	teleporterTrgUnlockMedia(pState);
1170
1171	char szMsg[64];
1172	size_t cch = RTStrPrintf(szMsg, sizeof(szMsg), "NACK=%d\n", rc2);
1173	int rc = RTTcpWrite(pState->mhSocket, szMsg, cch);
1174	if (RT_FAILURE(rc))
1175	LogRel(("Teleporter: RTTcpWrite(,%s,%zu) -> %Rrc\n", szMsg, cch, rc));
1176	RTTcpFlush(pState->mhSocket);
1177	return rc;
1178	}
1179
1180
1181	/**
1182	* @copydoc FNRTTCPSERVE
1183	*
1184	* @returns VINF_SUCCESS or VERR_TCP_SERVER_STOP.
1185	*/
1186	/static/ DECLCALLBACK(int)
1187	Console::teleporterTrgServeConnection(RTSOCKET Sock, void *pvUser)
1188	{
1189	TeleporterStateTrg pState = (TeleporterStateTrg )pvUser;
1190	pState->mhSocket = Sock;
1191
1192	/*
1193	* Say hello.
1194	*/
1195	int vrc = RTTcpWrite(Sock, g_szWelcome, sizeof(g_szWelcome) - 1);
1196	if (RT_FAILURE(vrc))
1197	{
1198	LogRel(("Teleporter: Failed to write welcome message: %Rrc\n", vrc));
1199	return VINF_SUCCESS;
1200	}
1201
1202	/*
1203	* Password (includes '\n', see teleporterTrg).
1204	*/
1205	const char *pszPassword = pState->mstrPassword.c_str();
1206	unsigned off = 0;
1207	while (pszPassword[off])
1208	{
1209	char ch;
1210	vrc = RTTcpRead(Sock, &ch, sizeof(ch), NULL);
1211	if ( RT_FAILURE(vrc)
1212	\|\| pszPassword[off] != ch)
1213	{
1214	if (RT_FAILURE(vrc))
1215	LogRel(("Teleporter: Password read failure (off=%u): %Rrc\n", off, vrc));
1216	else
1217	LogRel(("Teleporter: Invalid password (off=%u)\n", off));
1218	teleporterTcpWriteNACK(pState, VERR_AUTHENTICATION_FAILURE);
1219	return VINF_SUCCESS;
1220	}
1221	off++;
1222	}
1223	vrc = teleporterTcpWriteACK(pState);
1224	if (RT_FAILURE(vrc))
1225	return VINF_SUCCESS;
1226	LogRel(("Teleporter: Incoming VM!\n"));
1227
1228	/*
1229	* Stop the server and cancel the timeout timer.
1230	*
1231	* Note! After this point we must return VERR_TCP_SERVER_STOP, while prior
1232	* to it we must not return that value!
1233	*/
1234	RTTcpServerShutdown(pState->mhServer);
1235	RTTimerLRDestroy(*pState->mphTimerLR);
1236	*pState->mphTimerLR = NIL_RTTIMERLR;
1237
1238	/*
1239	* Command processing loop.
1240	*/
1241	bool fDone = false;
1242	for (;;)
1243	{
1244	char szCmd[128];
1245	vrc = teleporterTcpReadLine(pState, szCmd, sizeof(szCmd));
1246	if (RT_FAILURE(vrc))
1247	break;
1248
1249	if (!strcmp(szCmd, "load"))
1250	{
1251	vrc = teleporterTcpWriteACK(pState);
1252	if (RT_FAILURE(vrc))
1253	break;
1254
1255	pState->moffStream = 0;
1256	void pvUser2 = static_cast<void >(static_cast<TeleporterState *>(pState));
1257	vrc = VMR3LoadFromStream(pState->mpVM, &g_teleporterTcpOps, pvUser2,
1258	teleporterProgressCallback, pvUser2);
1259	if (RT_FAILURE(vrc))
1260	{
1261	LogRel(("Teleporter: VMR3LoadFromStream -> %Rrc\n", vrc));
1262	teleporterTcpWriteNACK(pState, vrc);
1263	break;
1264	}
1265
1266	/* The EOS might not have been read, make sure it is. */
1267	pState->mfStopReading = false;
1268	size_t cbRead;
1269	vrc = teleporterTcpOpRead(pvUser2, pState->moffStream, szCmd, 1, &cbRead);
1270	if (vrc != VERR_EOF)
1271	{
1272	LogRel(("Teleporter: Draining teleporterTcpOpRead -> %Rrc\n", vrc));
1273	teleporterTcpWriteNACK(pState, vrc);
1274	break;
1275	}
1276
1277	vrc = teleporterTcpWriteACK(pState);
1278	}
1279	else if (!strcmp(szCmd, "cancel"))
1280	{
1281	/* Don't ACK this. */
1282	LogRel(("Teleporter: Received cancel command.\n"));
1283	vrc = VERR_SSM_CANCELLED;
1284	}
1285	else if (!strcmp(szCmd, "lock-media"))
1286	{
1287	HRESULT hrc = pState->mpControl->LockMedia();
1288	if (SUCCEEDED(hrc))
1289	{
1290	pState->mfLockedMedia = true;
1291	vrc = teleporterTcpWriteACK(pState);
1292	}
1293	else
1294	{
1295	vrc = VERR_FILE_LOCK_FAILED;
1296	teleporterTcpWriteNACK(pState, vrc);
1297	}
1298	}
1299	else if ( !strcmp(szCmd, "hand-over-resume")
1300	\|\| !strcmp(szCmd, "hand-over-paused"))
1301	{
1302	/*
1303	* Point of no return.
1304	*
1305	* Note! Since we cannot tell whether a VMR3Resume failure is
1306	* destructive for the source or not, we have little choice
1307	* but to ACK it first and take any failures locally.
1308	*
1309	* Ideally, we should try resume it first and then ACK (or
1310	* NACK) the request since this would reduce latency and
1311	* make it possible to recover from some VMR3Resume failures.
1312	*/
1313	if ( pState->mptrProgress->notifyPointOfNoReturn()
1314	&& pState->mfLockedMedia)
1315	{
1316	vrc = teleporterTcpWriteACK(pState);
1317	if (RT_SUCCESS(vrc))
1318	{
1319	if (!strcmp(szCmd, "hand-over-resume"))
1320	vrc = VMR3Resume(pState->mpVM);
1321	else
1322	pState->mptrConsole->setMachineState(MachineState_Paused);
1323	fDone = true;
1324	break;
1325	}
1326	}
1327	else
1328	{
1329	vrc = pState->mfLockedMedia ? VERR_WRONG_ORDER : VERR_SSM_CANCELLED;
1330	teleporterTcpWriteNACK(pState, vrc);
1331	}
1332	}
1333	else
1334	{
1335	LogRel(("Teleporter: Unknown command '%s' (%.*Rhxs)\n", szCmd, strlen(szCmd), szCmd));
1336	vrc = VERR_NOT_IMPLEMENTED;
1337	teleporterTcpWriteNACK(pState, vrc);
1338	}
1339
1340	if (RT_FAILURE(vrc))
1341	break;
1342	}
1343
1344	if (RT_SUCCESS(vrc) && !fDone)
1345	vrc = VERR_WRONG_ORDER;
1346	if (RT_FAILURE(vrc))
1347	teleporterTrgUnlockMedia(pState);
1348
1349	pState->mRc = vrc;
1350	pState->mhSocket = NIL_RTSOCKET;
1351	LogFlowFunc(("returns mRc=%Rrc\n", vrc));
1352	return VERR_TCP_SERVER_STOP;
1353	}
1354

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source: vbox/trunk/src/VBox/Main/ConsoleImplTeleporter.cpp@ 28675

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