ConsoleImplTeleporter.cpp@ 63418

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1	/* $Id: ConsoleImplTeleporter.cpp 63239 2016-08-10 09:39:08Z vboxsync $ */
2	/** @file
3	* VBox Console COM Class implementation, The Teleporter Part.
4	*/
5
6	/*
7	* Copyright (C) 2010-2016 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	#include "HashedPw.h"
29
30	#include <iprt/asm.h>
31	#include <iprt/err.h>
32	#include <iprt/rand.h>
33	#include <iprt/socket.h>
34	#include <iprt/tcp.h>
35	#include <iprt/timer.h>
36
37	#include <VBox/vmm/vmapi.h>
38	#include <VBox/vmm/ssm.h>
39	#include <VBox/err.h>
40	#include <VBox/version.h>
41	#include <VBox/com/string.h>
42	#include "VBox/com/ErrorInfo.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	PUVM mpUVM;
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, PUVM pUVM, Progress pProgress, bool fIsSource)
73	: mptrConsole(pConsole)
74	, mpUVM(pUVM)
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	VMR3RetainUVM(mpUVM);
85	}
86
87	~TeleporterState()
88	{
89	VMR3ReleaseUVM(mpUVM);
90	mpUVM = NULL;
91	}
92	};
93
94
95	/**
96	* Teleporter state used by the source side.
97	*/
98	class TeleporterStateSrc : public TeleporterState
99	{
100	public:
101	Utf8Str mstrHostname;
102	uint32_t muPort;
103	uint32_t mcMsMaxDowntime;
104	MachineState_T menmOldMachineState;
105	bool mfSuspendedByUs;
106	bool mfUnlockedMedia;
107
108	TeleporterStateSrc(Console pConsole, PUVM pUVM, Progress pProgress, MachineState_T enmOldMachineState)
109	: TeleporterState(pConsole, pUVM, pProgress, true /fIsSource/)
110	, muPort(UINT32_MAX)
111	, mcMsMaxDowntime(250)
112	, menmOldMachineState(enmOldMachineState)
113	, mfSuspendedByUs(false)
114	, mfUnlockedMedia(false)
115	{
116	}
117	};
118
119
120	/**
121	* Teleporter state used by the destination side.
122	*/
123	class TeleporterStateTrg : public TeleporterState
124	{
125	public:
126	IMachine *mpMachine;
127	IInternalMachineControl *mpControl;
128	PRTTCPSERVER mhServer;
129	PRTTIMERLR mphTimerLR;
130	bool mfLockedMedia;
131	int mRc;
132	Utf8Str mErrorText;
133
134	TeleporterStateTrg(Console pConsole, PUVM pUVM, Progress pProgress,
135	IMachine pMachine, IInternalMachineControl pControl,
136	PRTTIMERLR phTimerLR, bool fStartPaused)
137	: TeleporterState(pConsole, pUVM, pProgress, false /fIsSource/)
138	, mpMachine(pMachine)
139	, mpControl(pControl)
140	, mhServer(NULL)
141	, mphTimerLR(phTimerLR)
142	, mfLockedMedia(false)
143	, mRc(VINF_SUCCESS)
144	, mErrorText()
145	{
146	RT_NOREF(fStartPaused); /** @todo figure out why fStartPaused isn't used */
147	}
148	};
149
150
151	/**
152	* TCP stream header.
153	*
154	* This is an extra layer for fixing the problem with figuring out when the SSM
155	* stream ends.
156	*/
157	typedef struct TELEPORTERTCPHDR
158	{
159	/** Magic value. */
160	uint32_t u32Magic;
161	/** The size of the data block following this header.
162	* 0 indicates the end of the stream, while UINT32_MAX indicates
163	* cancelation. */
164	uint32_t cb;
165	} TELEPORTERTCPHDR;
166	/** Magic value for TELEPORTERTCPHDR::u32Magic. (Egberto Gismonti Amin) */
167	#define TELEPORTERTCPHDR_MAGIC UINT32_C(0x19471205)
168	/** The max block size. */
169	#define TELEPORTERTCPHDR_MAX_SIZE UINT32_C(0x00fffff8)
170
171
172	/*********************************************************************************************************************************
173	* Global Variables *
174	*********************************************************************************************************************************/
175	static const char g_szWelcome[] = "VirtualBox-Teleporter-1.0\n";
176
177
178	/**
179	* Reads a string from the socket.
180	*
181	* @returns VBox status code.
182	*
183	* @param pState The teleporter state structure.
184	* @param pszBuf The output buffer.
185	* @param cchBuf The size of the output buffer.
186	*
187	*/
188	static int teleporterTcpReadLine(TeleporterState pState, char pszBuf, size_t cchBuf)
189	{
190	char *pszStart = pszBuf;
191	RTSOCKET Sock = pState->mhSocket;
192
193	AssertReturn(cchBuf > 1, VERR_INTERNAL_ERROR);
194	*pszBuf = '\0';
195
196	/* dead simple approach. */
197	for (;;)
198	{
199	char ch;
200	int rc = RTTcpRead(Sock, &ch, sizeof(ch), NULL);
201	if (RT_FAILURE(rc))
202	{
203	LogRel(("Teleporter: RTTcpRead -> %Rrc while reading string ('%s')\n", rc, pszStart));
204	return rc;
205	}
206	if ( ch == '\n'
207	\|\| ch == '\0')
208	return VINF_SUCCESS;
209	if (cchBuf <= 1)
210	{
211	LogRel(("Teleporter: String buffer overflow: '%s'\n", pszStart));
212	return VERR_BUFFER_OVERFLOW;
213	}
214	*pszBuf++ = ch;
215	*pszBuf = '\0';
216	cchBuf--;
217	}
218	}
219
220
221	/**
222	* Reads an ACK or NACK.
223	*
224	* @returns S_OK on ACK, E_FAIL+setError() on failure or NACK.
225	* @param pState The teleporter source state.
226	* @param pszWhich Which ACK is this this?
227	* @param pszNAckMsg Optional NACK message.
228	*
229	* @remarks the setError laziness forces this to be a Console member.
230	*/
231	HRESULT
232	Console::i_teleporterSrcReadACK(TeleporterStateSrc pState, const char pszWhich,
233	const char pszNAckMsg /= NULL*/)
234	{
235	char szMsg[256];
236	int vrc = teleporterTcpReadLine(pState, szMsg, sizeof(szMsg));
237	if (RT_FAILURE(vrc))
238	return setError(E_FAIL, tr("Failed reading ACK(%s): %Rrc"), pszWhich, vrc);
239
240	if (!strcmp(szMsg, "ACK"))
241	return S_OK;
242
243	if (!strncmp(szMsg, RT_STR_TUPLE("NACK=")))
244	{
245	char *pszMsgText = strchr(szMsg, ';');
246	if (pszMsgText)
247	*pszMsgText++ = '\0';
248
249	int32_t vrc2;
250	vrc = RTStrToInt32Full(&szMsg[sizeof("NACK=") - 1], 10, &vrc2);
251	if (vrc == VINF_SUCCESS)
252	{
253	/*
254	* Well formed NACK, transform it into an error.
255	*/
256	if (pszNAckMsg)
257	{
258	LogRel(("Teleporter: %s: NACK=%Rrc (%d)\n", pszWhich, vrc2, vrc2));
259	return setError(E_FAIL, pszNAckMsg);
260	}
261
262	if (pszMsgText)
263	{
264	pszMsgText = RTStrStrip(pszMsgText);
265	for (size_t off = 0; pszMsgText[off]; off++)
266	if (pszMsgText[off] == '\r')
267	pszMsgText[off] = '\n';
268
269	LogRel(("Teleporter: %s: NACK=%Rrc (%d) - '%s'\n", pszWhich, vrc2, vrc2, pszMsgText));
270	if (strlen(pszMsgText) > 4)
271	return setError(E_FAIL, "%s", pszMsgText);
272	return setError(E_FAIL, "NACK(%s) - %Rrc (%d) '%s'", pszWhich, vrc2, vrc2, pszMsgText);
273	}
274
275	return setError(E_FAIL, "NACK(%s) - %Rrc (%d)", pszWhich, vrc2, vrc2);
276	}
277
278	if (pszMsgText)
279	pszMsgText[-1] = ';';
280	}
281	return setError(E_FAIL, tr("%s: Expected ACK or NACK, got '%s'"), pszWhich, szMsg);
282	}
283
284
285	/**
286	* Submitts a command to the destination and waits for the ACK.
287	*
288	* @returns S_OK on ACKed command, E_FAIL+setError() on failure.
289	*
290	* @param pState The teleporter source state.
291	* @param pszCommand The command.
292	* @param fWaitForAck Whether to wait for the ACK.
293	*
294	* @remarks the setError laziness forces this to be a Console member.
295	*/
296	HRESULT Console::i_teleporterSrcSubmitCommand(TeleporterStateSrc pState, const char pszCommand, bool fWaitForAck /= true/)
297	{
298	int vrc = RTTcpSgWriteL(pState->mhSocket, 2, pszCommand, strlen(pszCommand), "\n", sizeof("\n") - 1);
299	if (RT_FAILURE(vrc))
300	return setError(E_FAIL, tr("Failed writing command '%s': %Rrc"), pszCommand, vrc);
301	if (!fWaitForAck)
302	return S_OK;
303	return i_teleporterSrcReadACK(pState, pszCommand);
304	}
305
306
307	/**
308	* @copydoc SSMSTRMOPS::pfnWrite
309	*/
310	static DECLCALLBACK(int) teleporterTcpOpWrite(void pvUser, uint64_t offStream, const void pvBuf, size_t cbToWrite)
311	{
312	RT_NOREF(offStream);
313	TeleporterState pState = (TeleporterState )pvUser;
314
315	AssertReturn(cbToWrite > 0, VINF_SUCCESS);
316	AssertReturn(cbToWrite < UINT32_MAX, VERR_OUT_OF_RANGE);
317	AssertReturn(pState->mfIsSource, VERR_INVALID_HANDLE);
318
319	for (;;)
320	{
321	TELEPORTERTCPHDR Hdr;
322	Hdr.u32Magic = TELEPORTERTCPHDR_MAGIC;
323	Hdr.cb = RT_MIN((uint32_t)cbToWrite, TELEPORTERTCPHDR_MAX_SIZE);
324	int rc = RTTcpSgWriteL(pState->mhSocket, 2, &Hdr, sizeof(Hdr), pvBuf, (size_t)Hdr.cb);
325	if (RT_FAILURE(rc))
326	{
327	LogRel(("Teleporter/TCP: Write error: %Rrc (cb=%#x)\n", rc, Hdr.cb));
328	return rc;
329	}
330	pState->moffStream += Hdr.cb;
331	if (Hdr.cb == cbToWrite)
332	return VINF_SUCCESS;
333
334	/* advance */
335	cbToWrite -= Hdr.cb;
336	pvBuf = (uint8_t const *)pvBuf + Hdr.cb;
337	}
338	}
339
340
341	/**
342	* Selects and poll for close condition.
343	*
344	* We can use a relatively high poll timeout here since it's only used to get
345	* us out of error paths. In the normal cause of events, we'll get a
346	* end-of-stream header.
347	*
348	* @returns VBox status code.
349	*
350	* @param pState The teleporter state data.
351	*/
352	static int teleporterTcpReadSelect(TeleporterState *pState)
353	{
354	int rc;
355	do
356	{
357	rc = RTTcpSelectOne(pState->mhSocket, 1000);
358	if (RT_FAILURE(rc) && rc != VERR_TIMEOUT)
359	{
360	pState->mfIOError = true;
361	LogRel(("Teleporter/TCP: Header select error: %Rrc\n", rc));
362	break;
363	}
364	if (pState->mfStopReading)
365	{
366	rc = VERR_EOF;
367	break;
368	}
369	} while (rc == VERR_TIMEOUT);
370	return rc;
371	}
372
373
374	/**
375	* @copydoc SSMSTRMOPS::pfnRead
376	*/
377	static DECLCALLBACK(int) teleporterTcpOpRead(void pvUser, uint64_t offStream, void pvBuf, size_t cbToRead, size_t *pcbRead)
378	{
379	RT_NOREF(offStream);
380	TeleporterState pState = (TeleporterState )pvUser;
381	AssertReturn(!pState->mfIsSource, VERR_INVALID_HANDLE);
382
383	for (;;)
384	{
385	int rc;
386
387	/*
388	* Check for various conditions and may have been signalled.
389	*/
390	if (pState->mfEndOfStream)
391	return VERR_EOF;
392	if (pState->mfStopReading)
393	return VERR_EOF;
394	if (pState->mfIOError)
395	return VERR_IO_GEN_FAILURE;
396
397	/*
398	* If there is no more data in the current block, read the next
399	* block header.
400	*/
401	if (!pState->mcbReadBlock)
402	{
403	rc = teleporterTcpReadSelect(pState);
404	if (RT_FAILURE(rc))
405	return rc;
406	TELEPORTERTCPHDR Hdr;
407	rc = RTTcpRead(pState->mhSocket, &Hdr, sizeof(Hdr), NULL);
408	if (RT_FAILURE(rc))
409	{
410	pState->mfIOError = true;
411	LogRel(("Teleporter/TCP: Header read error: %Rrc\n", rc));
412	return rc;
413	}
414
415	if (RT_UNLIKELY( Hdr.u32Magic != TELEPORTERTCPHDR_MAGIC
416	\|\| Hdr.cb > TELEPORTERTCPHDR_MAX_SIZE
417	\|\| Hdr.cb == 0))
418	{
419	if ( Hdr.u32Magic == TELEPORTERTCPHDR_MAGIC
420	&& ( Hdr.cb == 0
421	\|\| Hdr.cb == UINT32_MAX)
422	)
423	{
424	pState->mfEndOfStream = true;
425	pState->mcbReadBlock = 0;
426	return Hdr.cb ? VERR_SSM_CANCELLED : VERR_EOF;
427	}
428	pState->mfIOError = true;
429	LogRel(("Teleporter/TCP: Invalid block: u32Magic=%#x cb=%#x\n", Hdr.u32Magic, Hdr.cb));
430	return VERR_IO_GEN_FAILURE;
431	}
432
433	pState->mcbReadBlock = Hdr.cb;
434	if (pState->mfStopReading)
435	return VERR_EOF;
436	}
437
438	/*
439	* Read more data.
440	*/
441	rc = teleporterTcpReadSelect(pState);
442	if (RT_FAILURE(rc))
443	return rc;
444	uint32_t cb = (uint32_t)RT_MIN(pState->mcbReadBlock, cbToRead);
445	rc = RTTcpRead(pState->mhSocket, pvBuf, cb, pcbRead);
446	if (RT_FAILURE(rc))
447	{
448	pState->mfIOError = true;
449	LogRel(("Teleporter/TCP: Data read error: %Rrc (cb=%#x)\n", rc, cb));
450	return rc;
451	}
452	if (pcbRead)
453	{
454	cb = (uint32_t)*pcbRead;
455	pState->moffStream += cb;
456	pState->mcbReadBlock -= cb;
457	return VINF_SUCCESS;
458	}
459	pState->moffStream += cb;
460	pState->mcbReadBlock -= cb;
461	if (cbToRead == cb)
462	return VINF_SUCCESS;
463
464	/* Advance to the next block. */
465	cbToRead -= cb;
466	pvBuf = (uint8_t *)pvBuf + cb;
467	}
468	}
469
470
471	/**
472	* @copydoc SSMSTRMOPS::pfnSeek
473	*/
474	static DECLCALLBACK(int) teleporterTcpOpSeek(void pvUser, int64_t offSeek, unsigned uMethod, uint64_t poffActual)
475	{
476	RT_NOREF(pvUser, offSeek, uMethod, poffActual);
477	return VERR_NOT_SUPPORTED;
478	}
479
480
481	/**
482	* @copydoc SSMSTRMOPS::pfnTell
483	*/
484	static DECLCALLBACK(uint64_t) teleporterTcpOpTell(void *pvUser)
485	{
486	TeleporterState pState = (TeleporterState )pvUser;
487	return pState->moffStream;
488	}
489
490
491	/**
492	* @copydoc SSMSTRMOPS::pfnSize
493	*/
494	static DECLCALLBACK(int) teleporterTcpOpSize(void pvUser, uint64_t pcb)
495	{
496	RT_NOREF(pvUser, pcb);
497	return VERR_NOT_SUPPORTED;
498	}
499
500
501	/**
502	* @copydoc SSMSTRMOPS::pfnIsOk
503	*/
504	static DECLCALLBACK(int) teleporterTcpOpIsOk(void *pvUser)
505	{
506	TeleporterState pState = (TeleporterState )pvUser;
507
508	if (pState->mfIsSource)
509	{
510	/* Poll for incoming NACKs and errors from the other side */
511	int rc = RTTcpSelectOne(pState->mhSocket, 0);
512	if (rc != VERR_TIMEOUT)
513	{
514	if (RT_SUCCESS(rc))
515	{
516	LogRel(("Teleporter/TCP: Incoming data detect by IsOk, assuming it is a cancellation NACK.\n"));
517	rc = VERR_SSM_CANCELLED;
518	}
519	else
520	LogRel(("Teleporter/TCP: RTTcpSelectOne -> %Rrc (IsOk).\n", rc));
521	return rc;
522	}
523	}
524
525	return VINF_SUCCESS;
526	}
527
528
529	/**
530	* @copydoc SSMSTRMOPS::pfnClose
531	*/
532	static DECLCALLBACK(int) teleporterTcpOpClose(void *pvUser, bool fCanceled)
533	{
534	TeleporterState pState = (TeleporterState )pvUser;
535
536	if (pState->mfIsSource)
537	{
538	TELEPORTERTCPHDR EofHdr;
539	EofHdr.u32Magic = TELEPORTERTCPHDR_MAGIC;
540	EofHdr.cb = fCanceled ? UINT32_MAX : 0;
541	int rc = RTTcpWrite(pState->mhSocket, &EofHdr, sizeof(EofHdr));
542	if (RT_FAILURE(rc))
543	{
544	LogRel(("Teleporter/TCP: EOF Header write error: %Rrc\n", rc));
545	return rc;
546	}
547	}
548	else
549	{
550	ASMAtomicWriteBool(&pState->mfStopReading, true);
551	}
552
553	return VINF_SUCCESS;
554	}
555
556
557	/**
558	* Method table for a TCP based stream.
559	*/
560	static SSMSTRMOPS const g_teleporterTcpOps =
561	{
562	SSMSTRMOPS_VERSION,
563	teleporterTcpOpWrite,
564	teleporterTcpOpRead,
565	teleporterTcpOpSeek,
566	teleporterTcpOpTell,
567	teleporterTcpOpSize,
568	teleporterTcpOpIsOk,
569	teleporterTcpOpClose,
570	SSMSTRMOPS_VERSION
571	};
572
573
574	/**
575	* Progress cancelation callback.
576	*/
577	static void teleporterProgressCancelCallback(void *pvUser)
578	{
579	TeleporterState pState = (TeleporterState )pvUser;
580	SSMR3Cancel(pState->mpUVM);
581	if (!pState->mfIsSource)
582	{
583	TeleporterStateTrg pStateTrg = (TeleporterStateTrg )pState;
584	RTTcpServerShutdown(pStateTrg->mhServer);
585	}
586	}
587
588	/**
589	* @copydoc PFNVMPROGRESS
590	*/
591	static DECLCALLBACK(int) teleporterProgressCallback(PUVM pUVM, unsigned uPercent, void *pvUser)
592	{
593	TeleporterState pState = (TeleporterState )pvUser;
594	if (pState->mptrProgress)
595	{
596	HRESULT hrc = pState->mptrProgress->SetCurrentOperationProgress(uPercent);
597	if (FAILED(hrc))
598	{
599	/* check if the failure was caused by cancellation. */
600	BOOL fCanceled;
601	hrc = pState->mptrProgress->COMGETTER(Canceled)(&fCanceled);
602	if (SUCCEEDED(hrc) && fCanceled)
603	{
604	SSMR3Cancel(pState->mpUVM);
605	return VERR_SSM_CANCELLED;
606	}
607	}
608	}
609
610	NOREF(pUVM);
611	return VINF_SUCCESS;
612	}
613
614
615	/**
616	* @copydoc FNRTTIMERLR
617	*/
618	static DECLCALLBACK(void) teleporterDstTimeout(RTTIMERLR hTimerLR, void *pvUser, uint64_t iTick)
619	{
620	RT_NOREF(hTimerLR, iTick);
621	/* This is harmless for any open connections. */
622	RTTcpServerShutdown((PRTTCPSERVER)pvUser);
623	}
624
625
626	/**
627	* Do the teleporter.
628	*
629	* @returns VBox status code.
630	* @param pState The teleporter state.
631	*/
632	HRESULT Console::i_teleporterSrc(TeleporterStateSrc *pState)
633	{
634	AutoCaller autoCaller(this);
635	if (FAILED(autoCaller.rc())) return autoCaller.rc();
636
637	/*
638	* Wait for Console::Teleport to change the state.
639	*/
640	{ AutoWriteLock autoLock(this COMMA_LOCKVAL_SRC_POS); }
641
642	BOOL fCanceled = TRUE;
643	HRESULT hrc = pState->mptrProgress->COMGETTER(Canceled)(&fCanceled);
644	if (FAILED(hrc))
645	return hrc;
646	if (fCanceled)
647	return setError(E_FAIL, tr("canceled"));
648
649	/*
650	* Try connect to the destination machine, disable Nagle.
651	* (Note. The caller cleans up mhSocket, so we can return without worries.)
652	*/
653	int vrc = RTTcpClientConnect(pState->mstrHostname.c_str(), pState->muPort, &pState->mhSocket);
654	if (RT_FAILURE(vrc))
655	return setError(E_FAIL, tr("Failed to connect to port %u on '%s': %Rrc"),
656	pState->muPort, pState->mstrHostname.c_str(), vrc);
657	vrc = RTTcpSetSendCoalescing(pState->mhSocket, false /fEnable/);
658	AssertRC(vrc);
659
660	/* Read and check the welcome message. */
661	char szLine[RT_MAX(128, sizeof(g_szWelcome))];
662	RT_ZERO(szLine);
663	vrc = RTTcpRead(pState->mhSocket, szLine, sizeof(g_szWelcome) - 1, NULL);
664	if (RT_FAILURE(vrc))
665	return setError(E_FAIL, tr("Failed to read welcome message: %Rrc"), vrc);
666	if (strcmp(szLine, g_szWelcome))
667	return setError(E_FAIL, tr("Unexpected welcome %.*Rhxs"), sizeof(g_szWelcome) - 1, szLine);
668
669	/* password */
670	pState->mstrPassword.append('\n');
671	vrc = RTTcpWrite(pState->mhSocket, pState->mstrPassword.c_str(), pState->mstrPassword.length());
672	if (RT_FAILURE(vrc))
673	return setError(E_FAIL, tr("Failed to send password: %Rrc"), vrc);
674
675	/* ACK */
676	hrc = i_teleporterSrcReadACK(pState, "password", tr("Invalid password"));
677	if (FAILED(hrc))
678	return hrc;
679
680	/*
681	* Start loading the state.
682	*
683	* Note! The saved state includes vital configuration data which will be
684	* verified against the VM config on the other end. This is all done
685	* in the first pass, so we should fail pretty promptly on misconfig.
686	*/
687	hrc = i_teleporterSrcSubmitCommand(pState, "load");
688	if (FAILED(hrc))
689	return hrc;
690
691	RTSocketRetain(pState->mhSocket);
692	void pvUser = static_cast<void >(static_cast<TeleporterState *>(pState));
693	vrc = VMR3Teleport(pState->mpUVM,
694	pState->mcMsMaxDowntime,
695	&g_teleporterTcpOps, pvUser,
696	teleporterProgressCallback, pvUser,
697	&pState->mfSuspendedByUs);
698	RTSocketRelease(pState->mhSocket);
699	if (RT_FAILURE(vrc))
700	{
701	if ( vrc == VERR_SSM_CANCELLED
702	&& RT_SUCCESS(RTTcpSelectOne(pState->mhSocket, 1)))
703	{
704	hrc = i_teleporterSrcReadACK(pState, "load-complete");
705	if (FAILED(hrc))
706	return hrc;
707	}
708	return setError(E_FAIL, tr("VMR3Teleport -> %Rrc"), vrc);
709	}
710
711	hrc = i_teleporterSrcReadACK(pState, "load-complete");
712	if (FAILED(hrc))
713	return hrc;
714
715	/*
716	* We're at the point of no return.
717	*/
718	if (!pState->mptrProgress->i_notifyPointOfNoReturn())
719	{
720	i_teleporterSrcSubmitCommand(pState, "cancel", false /fWaitForAck/);
721	return E_FAIL;
722	}
723
724	/*
725	* Hand over any media which we might be sharing.
726	*
727	* Note! This is only important on localhost teleportations.
728	*/
729	/** @todo Maybe we should only do this if it's a local teleportation... */
730	hrc = mControl->UnlockMedia();
731	if (FAILED(hrc))
732	return hrc;
733	pState->mfUnlockedMedia = true;
734
735	hrc = i_teleporterSrcSubmitCommand(pState, "lock-media");
736	if (FAILED(hrc))
737	return hrc;
738
739	/*
740	* The FINAL step is giving the target instructions how to proceed with the VM.
741	*/
742	if ( vrc == VINF_SSM_LIVE_SUSPENDED
743	\|\| pState->menmOldMachineState == MachineState_Paused)
744	hrc = i_teleporterSrcSubmitCommand(pState, "hand-over-paused");
745	else
746	hrc = i_teleporterSrcSubmitCommand(pState, "hand-over-resume");
747	if (FAILED(hrc))
748	return hrc;
749
750	/*
751	* teleporterSrcThreadWrapper will do the automatic power off because it
752	* has to release the AutoVMCaller.
753	*/
754	return S_OK;
755	}
756
757
758	/**
759	* Static thread method wrapper.
760	*
761	* @returns VINF_SUCCESS (ignored).
762	* @param hThreadSelf The thread.
763	* @param pvUser Pointer to a TeleporterStateSrc instance.
764	*/
765	/static/ DECLCALLBACK(int)
766	Console::i_teleporterSrcThreadWrapper(RTTHREAD hThreadSelf, void *pvUser)
767	{
768	RT_NOREF(hThreadSelf);
769	TeleporterStateSrc pState = (TeleporterStateSrc )pvUser;
770
771	/*
772	* Console::teleporterSrc does the work, we just grab onto the VM handle
773	* and do the cleanups afterwards.
774	*/
775	SafeVMPtr ptrVM(pState->mptrConsole);
776	HRESULT hrc = ptrVM.rc();
777
778	if (SUCCEEDED(hrc))
779	hrc = pState->mptrConsole->i_teleporterSrc(pState);
780
781	/* Close the connection ASAP on so that the other side can complete. */
782	if (pState->mhSocket != NIL_RTSOCKET)
783	{
784	RTTcpClientClose(pState->mhSocket);
785	pState->mhSocket = NIL_RTSOCKET;
786	}
787
788	/* Aaarg! setMachineState trashes error info on Windows, so we have to
789	complete things here on failure instead of right before cleanup. */
790	if (FAILED(hrc))
791	pState->mptrProgress->i_notifyComplete(hrc);
792
793	/* We can no longer be canceled (success), or it doesn't matter any longer (failure). */
794	pState->mptrProgress->i_setCancelCallback(NULL, NULL);
795
796	/*
797	* Write lock the console before resetting mptrCancelableProgress and
798	* fixing the state.
799	*/
800	AutoWriteLock autoLock(pState->mptrConsole COMMA_LOCKVAL_SRC_POS);
801	pState->mptrConsole->mptrCancelableProgress.setNull();
802
803	VMSTATE const enmVMState = VMR3GetStateU(pState->mpUVM);
804	MachineState_T const enmMachineState = pState->mptrConsole->mMachineState;
805	if (SUCCEEDED(hrc))
806	{
807	/*
808	* Automatically shut down the VM on success.
809	*
810	* Note! We have to release the VM caller object or we'll deadlock in
811	* powerDown.
812	*/
813	AssertLogRelMsg(enmVMState == VMSTATE_SUSPENDED, ("%s\n", VMR3GetStateName(enmVMState)));
814	AssertLogRelMsg(enmMachineState == MachineState_TeleportingPausedVM,
815	("%s\n", Global::stringifyMachineState(enmMachineState)));
816
817	ptrVM.release();
818
819	pState->mptrConsole->mVMIsAlreadyPoweringOff = true; /* (Make sure we stick in the TeleportingPausedVM state.) */
820	autoLock.release();
821
822	hrc = pState->mptrConsole->i_powerDown();
823
824	autoLock.acquire();
825	pState->mptrConsole->mVMIsAlreadyPoweringOff = false;
826
827	pState->mptrProgress->i_notifyComplete(hrc);
828	}
829	else
830	{
831	/*
832	* Work the state machinery on failure.
833	*
834	* If the state is no longer 'Teleporting*', some other operation has
835	* canceled us and there is nothing we need to do here. In all other
836	* cases, we've failed one way or another.
837	*/
838	if ( enmMachineState == MachineState_Teleporting
839	\|\| enmMachineState == MachineState_TeleportingPausedVM
840	)
841	{
842	if (pState->mfUnlockedMedia)
843	{
844	ErrorInfoKeeper Oak;
845	HRESULT hrc2 = pState->mptrConsole->mControl->LockMedia();
846	if (FAILED(hrc2))
847	{
848	uint64_t StartMS = RTTimeMilliTS();
849	do
850	{
851	RTThreadSleep(2);
852	hrc2 = pState->mptrConsole->mControl->LockMedia();
853	} while ( FAILED(hrc2)
854	&& RTTimeMilliTS() - StartMS < 2000);
855	}
856	if (SUCCEEDED(hrc2))
857	pState->mfUnlockedMedia = true;
858	else
859	LogRel(("FATAL ERROR: Failed to re-take the media locks. hrc2=%Rhrc\n", hrc2));
860	}
861
862	switch (enmVMState)
863	{
864	case VMSTATE_RUNNING:
865	case VMSTATE_RUNNING_LS:
866	case VMSTATE_DEBUGGING:
867	case VMSTATE_DEBUGGING_LS:
868	case VMSTATE_POWERING_OFF:
869	case VMSTATE_POWERING_OFF_LS:
870	case VMSTATE_RESETTING:
871	case VMSTATE_RESETTING_LS:
872	case VMSTATE_SOFT_RESETTING:
873	case VMSTATE_SOFT_RESETTING_LS:
874	Assert(!pState->mfSuspendedByUs);
875	Assert(!pState->mfUnlockedMedia);
876	pState->mptrConsole->i_setMachineState(MachineState_Running);
877	break;
878
879	case VMSTATE_GURU_MEDITATION:
880	case VMSTATE_GURU_MEDITATION_LS:
881	pState->mptrConsole->i_setMachineState(MachineState_Stuck);
882	break;
883
884	case VMSTATE_FATAL_ERROR:
885	case VMSTATE_FATAL_ERROR_LS:
886	pState->mptrConsole->i_setMachineState(MachineState_Paused);
887	break;
888
889	default:
890	AssertMsgFailed(("%s\n", VMR3GetStateName(enmVMState)));
891	case VMSTATE_SUSPENDED:
892	case VMSTATE_SUSPENDED_LS:
893	case VMSTATE_SUSPENDING:
894	case VMSTATE_SUSPENDING_LS:
895	case VMSTATE_SUSPENDING_EXT_LS:
896	if (!pState->mfUnlockedMedia)
897	{
898	pState->mptrConsole->i_setMachineState(MachineState_Paused);
899	if (pState->mfSuspendedByUs)
900	{
901	autoLock.release();
902	int rc = VMR3Resume(pState->mpUVM, VMRESUMEREASON_TELEPORT_FAILED);
903	AssertLogRelMsgRC(rc, ("VMR3Resume -> %Rrc\n", rc));
904	autoLock.acquire();
905	}
906	}
907	else
908	{
909	/* Faking a guru meditation is the best I can think of doing here... */
910	pState->mptrConsole->i_setMachineState(MachineState_Stuck);
911	}
912	break;
913	}
914	}
915	}
916	autoLock.release();
917
918	/*
919	* Cleanup.
920	*/
921	Assert(pState->mhSocket == NIL_RTSOCKET);
922	delete pState;
923
924	return VINF_SUCCESS; /* ignored */
925	}
926
927
928	/**
929	* Start teleporter to the specified target.
930	*
931	* @returns COM status code.
932	*
933	* @param aHostname The name of the target host.
934	* @param aPort The TCP port number.
935	* @param aPassword The password.
936	* @param aMaxDowntime Max allowed "downtime" in milliseconds.
937	* @param aProgress Where to return the progress object.
938	*/
939	HRESULT Console::teleport(const com::Utf8Str &aHostname, ULONG aTcpport, const com::Utf8Str &aPassword,
940	ULONG aMaxDowntime, ComPtr<IProgress> &aProgress)
941	{
942	/*
943	* Validate parameters, check+hold object status, write lock the object
944	* and validate the state.
945	*/
946	Utf8Str strPassword(aPassword);
947	if (!strPassword.isEmpty())
948	{
949	if (VBoxIsPasswordHashed(&strPassword))
950	return setError(E_INVALIDARG, tr("The specified password resembles a hashed password, expected plain text"));
951	VBoxHashPassword(&strPassword);
952	}
953
954	AutoCaller autoCaller(this);
955	if (FAILED(autoCaller.rc())) return autoCaller.rc();
956
957	AutoWriteLock autoLock(this COMMA_LOCKVAL_SRC_POS);
958	LogFlowThisFunc(("mMachineState=%d\n", mMachineState));
959
960	switch (mMachineState)
961	{
962	case MachineState_Running:
963	case MachineState_Paused:
964	break;
965
966	default:
967	return setError(VBOX_E_INVALID_VM_STATE,
968	tr("Invalid machine state: %s (must be Running or Paused)"),
969	Global::stringifyMachineState(mMachineState));
970	}
971
972
973	/*
974	* Create a progress object, spawn a worker thread and change the state.
975	* Note! The thread won't start working until we release the lock.
976	*/
977	LogFlowThisFunc(("Initiating TELEPORT request...\n"));
978
979	ComObjPtr<Progress> ptrProgress;
980	HRESULT hrc = ptrProgress.createObject();
981	if (SUCCEEDED(hrc))
982	hrc = ptrProgress->init(static_cast<IConsole *>(this),
983	Bstr(tr("Teleporter")).raw(),
984	TRUE /aCancelable/);
985	if (FAILED(hrc))
986	return hrc;
987
988	TeleporterStateSrc *pState = new TeleporterStateSrc(this, mpUVM, ptrProgress, mMachineState);
989	pState->mstrPassword = strPassword;
990	pState->mstrHostname = aHostname;
991	pState->muPort = aTcpport;
992	pState->mcMsMaxDowntime = aMaxDowntime;
993
994	void pvUser = static_cast<void >(static_cast<TeleporterState *>(pState));
995	ptrProgress->i_setCancelCallback(teleporterProgressCancelCallback, pvUser);
996
997	int vrc = RTThreadCreate(NULL, Console::i_teleporterSrcThreadWrapper, (void )pState, 0 /cbStack*/,
998	RTTHREADTYPE_EMULATION, 0 /fFlags/, "Teleport");
999	if (RT_SUCCESS(vrc))
1000	{
1001	if (mMachineState == MachineState_Running)
1002	hrc = i_setMachineState(MachineState_Teleporting);
1003	else
1004	hrc = i_setMachineState(MachineState_TeleportingPausedVM);
1005	if (SUCCEEDED(hrc))
1006	{
1007	ptrProgress.queryInterfaceTo(aProgress.asOutParam());
1008	mptrCancelableProgress = aProgress;
1009	}
1010	else
1011	ptrProgress->Cancel();
1012	}
1013	else
1014	{
1015	ptrProgress->i_setCancelCallback(NULL, NULL);
1016	delete pState;
1017	hrc = setError(E_FAIL, tr("RTThreadCreate -> %Rrc"), vrc);
1018	}
1019
1020	return hrc;
1021	}
1022
1023
1024	/**
1025	* Creates a TCP server that listens for the source machine and passes control
1026	* over to Console::teleporterTrgServeConnection().
1027	*
1028	* @returns VBox status code.
1029	* @param pUVM The user-mode VM handle
1030	* @param pMachine The IMachine for the virtual machine.
1031	* @param pErrorMsg Pointer to the error string for VMSetError.
1032	* @param fStartPaused Whether to start it in the Paused (true) or
1033	* Running (false) state,
1034	* @param pProgress Pointer to the progress object.
1035	* @param pfPowerOffOnFailure Whether the caller should power off
1036	* the VM on failure.
1037	*
1038	* @remarks The caller expects error information to be set on failure.
1039	* @todo Check that all the possible failure paths sets error info...
1040	*/
1041	HRESULT Console::i_teleporterTrg(PUVM pUVM, IMachine pMachine, Utf8Str pErrorMsg, bool fStartPaused,
1042	Progress pProgress, bool pfPowerOffOnFailure)
1043	{
1044	LogThisFunc(("pUVM=%p pMachine=%p fStartPaused=%RTbool pProgress=%p\n", pUVM, pMachine, fStartPaused, pProgress));
1045
1046	*pfPowerOffOnFailure = true;
1047
1048	/*
1049	* Get the config.
1050	*/
1051	ULONG uPort;
1052	HRESULT hrc = pMachine->COMGETTER(TeleporterPort)(&uPort);
1053	if (FAILED(hrc))
1054	return hrc;
1055	ULONG const uPortOrg = uPort;
1056
1057	Bstr bstrAddress;
1058	hrc = pMachine->COMGETTER(TeleporterAddress)(bstrAddress.asOutParam());
1059	if (FAILED(hrc))
1060	return hrc;
1061	Utf8Str strAddress(bstrAddress);
1062	const char *pszAddress = strAddress.isEmpty() ? NULL : strAddress.c_str();
1063
1064	Bstr bstrPassword;
1065	hrc = pMachine->COMGETTER(TeleporterPassword)(bstrPassword.asOutParam());
1066	if (FAILED(hrc))
1067	return hrc;
1068	Utf8Str strPassword(bstrPassword);
1069	strPassword.append('\n'); /* To simplify password checking. */
1070
1071	/*
1072	* Create the TCP server.
1073	*/
1074	int vrc = VINF_SUCCESS; /* Shut up MSC */
1075	PRTTCPSERVER hServer = NULL; /* ditto */
1076	if (uPort)
1077	vrc = RTTcpServerCreateEx(pszAddress, uPort, &hServer);
1078	else
1079	{
1080	for (int cTries = 10240; cTries > 0; cTries--)
1081	{
1082	uPort = RTRandU32Ex(cTries >= 8192 ? 49152 : 1024, 65534);
1083	vrc = RTTcpServerCreateEx(pszAddress, uPort, &hServer);
1084	if (vrc != VERR_NET_ADDRESS_IN_USE)
1085	break;
1086	}
1087	if (RT_SUCCESS(vrc))
1088	{
1089	hrc = pMachine->COMSETTER(TeleporterPort)(uPort);
1090	if (FAILED(hrc))
1091	{
1092	RTTcpServerDestroy(hServer);
1093	return hrc;
1094	}
1095	}
1096	}
1097	if (RT_FAILURE(vrc))
1098	return setError(E_FAIL, tr("RTTcpServerCreateEx failed with status %Rrc"), vrc);
1099
1100	/*
1101	* Create a one-shot timer for timing out after 5 mins.
1102	*/
1103	RTTIMERLR hTimerLR;
1104	vrc = RTTimerLRCreateEx(&hTimerLR, 0 /ns/, RTTIMER_FLAGS_CPU_ANY, teleporterDstTimeout, hServer);
1105	if (RT_SUCCESS(vrc))
1106	{
1107	vrc = RTTimerLRStart(hTimerLR, 560UINT64_C(1000000000) /ns/);
1108	if (RT_SUCCESS(vrc))
1109	{
1110	/*
1111	* Do the job, when it returns we're done.
1112	*/
1113	TeleporterStateTrg theState(this, pUVM, pProgress, pMachine, mControl, &hTimerLR, fStartPaused);
1114	theState.mstrPassword = strPassword;
1115	theState.mhServer = hServer;
1116
1117	void pvUser = static_cast<void >(static_cast<TeleporterState *>(&theState));
1118	if (pProgress->i_setCancelCallback(teleporterProgressCancelCallback, pvUser))
1119	{
1120	LogRel(("Teleporter: Waiting for incoming VM...\n"));
1121	hrc = pProgress->SetNextOperation(Bstr(tr("Waiting for incoming VM")).raw(), 1);
1122	if (SUCCEEDED(hrc))
1123	{
1124	vrc = RTTcpServerListen(hServer, Console::i_teleporterTrgServeConnection, &theState);
1125	pProgress->i_setCancelCallback(NULL, NULL);
1126
1127	if (vrc == VERR_TCP_SERVER_STOP)
1128	{
1129	vrc = theState.mRc;
1130	/* Power off the VM on failure unless the state callback
1131	already did that. */
1132	*pfPowerOffOnFailure = false;
1133	if (RT_SUCCESS(vrc))
1134	hrc = S_OK;
1135	else
1136	{
1137	VMSTATE enmVMState = VMR3GetStateU(pUVM);
1138	if ( enmVMState != VMSTATE_OFF
1139	&& enmVMState != VMSTATE_POWERING_OFF)
1140	*pfPowerOffOnFailure = true;
1141
1142	/* Set error. */
1143	if (pErrorMsg->length())
1144	hrc = setError(E_FAIL, "%s", pErrorMsg->c_str());
1145	else
1146	hrc = setError(E_FAIL, tr("Teleporation failed (%Rrc)"), vrc);
1147	}
1148	}
1149	else if (vrc == VERR_TCP_SERVER_SHUTDOWN)
1150	{
1151	BOOL fCanceled = TRUE;
1152	hrc = pProgress->COMGETTER(Canceled)(&fCanceled);
1153	if (FAILED(hrc) \|\| fCanceled)
1154	hrc = setError(E_FAIL, tr("Teleporting canceled"));
1155	else
1156	hrc = setError(E_FAIL, tr("Teleporter timed out waiting for incoming connection"));
1157	LogRel(("Teleporter: RTTcpServerListen aborted - %Rrc\n", vrc));
1158	}
1159	else
1160	{
1161	hrc = setError(E_FAIL, tr("Unexpected RTTcpServerListen status code %Rrc"), vrc);
1162	LogRel(("Teleporter: Unexpected RTTcpServerListen rc: %Rrc\n", vrc));
1163	}
1164	}
1165	else
1166	LogThisFunc(("SetNextOperation failed, %Rhrc\n", hrc));
1167	}
1168	else
1169	{
1170	LogThisFunc(("Canceled - check point #1\n"));
1171	hrc = setError(E_FAIL, tr("Teleporting canceled"));
1172	}
1173	}
1174	else
1175	hrc = setError(E_FAIL, "RTTimerLRStart -> %Rrc", vrc);
1176
1177	RTTimerLRDestroy(hTimerLR);
1178	}
1179	else
1180	hrc = setError(E_FAIL, "RTTimerLRCreate -> %Rrc", vrc);
1181	RTTcpServerDestroy(hServer);
1182
1183	/*
1184	* If we change TeleporterPort above, set it back to it's original
1185	* value before returning.
1186	*/
1187	if (uPortOrg != uPort)
1188	{
1189	ErrorInfoKeeper Eik;
1190	pMachine->COMSETTER(TeleporterPort)(uPortOrg);
1191	}
1192
1193	return hrc;
1194	}
1195
1196
1197	/**
1198	* Unlock the media.
1199	*
1200	* This is used in error paths.
1201	*
1202	* @param pState The teleporter state.
1203	*/
1204	static void teleporterTrgUnlockMedia(TeleporterStateTrg *pState)
1205	{
1206	if (pState->mfLockedMedia)
1207	{
1208	pState->mpControl->UnlockMedia();
1209	pState->mfLockedMedia = false;
1210	}
1211	}
1212
1213
1214	static int teleporterTcpWriteACK(TeleporterStateTrg *pState, bool fAutomaticUnlock = true)
1215	{
1216	int rc = RTTcpWrite(pState->mhSocket, "ACK\n", sizeof("ACK\n") - 1);
1217	if (RT_FAILURE(rc))
1218	{
1219	LogRel(("Teleporter: RTTcpWrite(,ACK,) -> %Rrc\n", rc));
1220	if (fAutomaticUnlock)
1221	teleporterTrgUnlockMedia(pState);
1222	}
1223	return rc;
1224	}
1225
1226
1227	static int teleporterTcpWriteNACK(TeleporterStateTrg pState, int32_t rc2, const char pszMsgText = NULL)
1228	{
1229	/*
1230	* Unlock media sending the NACK. That way the other doesn't have to spin
1231	* waiting to regain the locks.
1232	*/
1233	teleporterTrgUnlockMedia(pState);
1234
1235	char szMsg[256];
1236	size_t cch;
1237	if (pszMsgText && *pszMsgText)
1238	{
1239	cch = RTStrPrintf(szMsg, sizeof(szMsg), "NACK=%d;%s\n", rc2, pszMsgText);
1240	for (size_t off = 6; off + 1 < cch; off++)
1241	if (szMsg[off] == '\n')
1242	szMsg[off] = '\r';
1243	}
1244	else
1245	cch = RTStrPrintf(szMsg, sizeof(szMsg), "NACK=%d\n", rc2);
1246	int rc = RTTcpWrite(pState->mhSocket, szMsg, cch);
1247	if (RT_FAILURE(rc))
1248	LogRel(("Teleporter: RTTcpWrite(,%s,%zu) -> %Rrc\n", szMsg, cch, rc));
1249	return rc;
1250	}
1251
1252
1253	/**
1254	* @copydoc FNRTTCPSERVE
1255	*
1256	* @returns VINF_SUCCESS or VERR_TCP_SERVER_STOP.
1257	*/
1258	/static/ DECLCALLBACK(int)
1259	Console::i_teleporterTrgServeConnection(RTSOCKET Sock, void *pvUser)
1260	{
1261	TeleporterStateTrg pState = (TeleporterStateTrg )pvUser;
1262	pState->mhSocket = Sock;
1263
1264	/*
1265	* Disable Nagle and say hello.
1266	*/
1267	int vrc = RTTcpSetSendCoalescing(pState->mhSocket, false /fEnable/);
1268	AssertRC(vrc);
1269	vrc = RTTcpWrite(Sock, g_szWelcome, sizeof(g_szWelcome) - 1);
1270	if (RT_FAILURE(vrc))
1271	{
1272	LogRel(("Teleporter: Failed to write welcome message: %Rrc\n", vrc));
1273	return VINF_SUCCESS;
1274	}
1275
1276	/*
1277	* Password (includes '\n', see teleporterTrg).
1278	*/
1279	const char *pszPassword = pState->mstrPassword.c_str();
1280	unsigned off = 0;
1281	while (pszPassword[off])
1282	{
1283	char ch;
1284	vrc = RTTcpRead(Sock, &ch, sizeof(ch), NULL);
1285	if ( RT_FAILURE(vrc)
1286	\|\| pszPassword[off] != ch)
1287	{
1288	if (RT_FAILURE(vrc))
1289	LogRel(("Teleporter: Password read failure (off=%u): %Rrc\n", off, vrc));
1290	else
1291	LogRel(("Teleporter: Invalid password (off=%u)\n", off));
1292	teleporterTcpWriteNACK(pState, VERR_AUTHENTICATION_FAILURE);
1293	return VINF_SUCCESS;
1294	}
1295	off++;
1296	}
1297	vrc = teleporterTcpWriteACK(pState);
1298	if (RT_FAILURE(vrc))
1299	return VINF_SUCCESS;
1300
1301	/*
1302	* Update the progress bar, with peer name if available.
1303	*/
1304	HRESULT hrc;
1305	RTNETADDR Addr;
1306	vrc = RTTcpGetPeerAddress(Sock, &Addr);
1307	if (RT_SUCCESS(vrc))
1308	{
1309	LogRel(("Teleporter: Incoming VM from %RTnaddr!\n", &Addr));
1310	hrc = pState->mptrProgress->SetNextOperation(BstrFmt(tr("Teleporting VM from %RTnaddr"), &Addr).raw(), 8);
1311	}
1312	else
1313	{
1314	LogRel(("Teleporter: Incoming VM!\n"));
1315	hrc = pState->mptrProgress->SetNextOperation(Bstr(tr("Teleporting VM")).raw(), 8);
1316	}
1317	AssertMsg(SUCCEEDED(hrc) \|\| hrc == E_FAIL, ("%Rhrc\n", hrc));
1318
1319	/*
1320	* Stop the server and cancel the timeout timer.
1321	*
1322	* Note! After this point we must return VERR_TCP_SERVER_STOP, while prior
1323	* to it we must not return that value!
1324	*/
1325	RTTcpServerShutdown(pState->mhServer);
1326	RTTimerLRDestroy(*pState->mphTimerLR);
1327	*pState->mphTimerLR = NIL_RTTIMERLR;
1328
1329	/*
1330	* Command processing loop.
1331	*/
1332	bool fDone = false;
1333	for (;;)
1334	{
1335	char szCmd[128];
1336	vrc = teleporterTcpReadLine(pState, szCmd, sizeof(szCmd));
1337	if (RT_FAILURE(vrc))
1338	break;
1339
1340	if (!strcmp(szCmd, "load"))
1341	{
1342	vrc = teleporterTcpWriteACK(pState);
1343	if (RT_FAILURE(vrc))
1344	break;
1345
1346	int vrc2 = VMR3AtErrorRegister(pState->mpUVM,
1347	Console::i_genericVMSetErrorCallback, &pState->mErrorText); AssertRC(vrc2);
1348	RTSocketRetain(pState->mhSocket); /* For concurrent access by I/O thread and EMT. */
1349	pState->moffStream = 0;
1350
1351	void pvUser2 = static_cast<void >(static_cast<TeleporterState *>(pState));
1352	vrc = VMR3LoadFromStream(pState->mpUVM,
1353	&g_teleporterTcpOps, pvUser2,
1354	teleporterProgressCallback, pvUser2);
1355
1356	RTSocketRelease(pState->mhSocket);
1357	vrc2 = VMR3AtErrorDeregister(pState->mpUVM, Console::i_genericVMSetErrorCallback, &pState->mErrorText);
1358	AssertRC(vrc2);
1359
1360	if (RT_FAILURE(vrc))
1361	{
1362	LogRel(("Teleporter: VMR3LoadFromStream -> %Rrc\n", vrc));
1363	teleporterTcpWriteNACK(pState, vrc, pState->mErrorText.c_str());
1364	break;
1365	}
1366
1367	/* The EOS might not have been read, make sure it is. */
1368	pState->mfStopReading = false;
1369	size_t cbRead;
1370	vrc = teleporterTcpOpRead(pvUser2, pState->moffStream, szCmd, 1, &cbRead);
1371	if (vrc != VERR_EOF)
1372	{
1373	LogRel(("Teleporter: Draining teleporterTcpOpRead -> %Rrc\n", vrc));
1374	teleporterTcpWriteNACK(pState, vrc);
1375	break;
1376	}
1377
1378	vrc = teleporterTcpWriteACK(pState);
1379	}
1380	else if (!strcmp(szCmd, "cancel"))
1381	{
1382	/* Don't ACK this. */
1383	LogRel(("Teleporter: Received cancel command.\n"));
1384	vrc = VERR_SSM_CANCELLED;
1385	}
1386	else if (!strcmp(szCmd, "lock-media"))
1387	{
1388	hrc = pState->mpControl->LockMedia();
1389	if (SUCCEEDED(hrc))
1390	{
1391	pState->mfLockedMedia = true;
1392	vrc = teleporterTcpWriteACK(pState);
1393	}
1394	else
1395	{
1396	vrc = VERR_FILE_LOCK_FAILED;
1397	teleporterTcpWriteNACK(pState, vrc);
1398	}
1399	}
1400	else if ( !strcmp(szCmd, "hand-over-resume")
1401	\|\| !strcmp(szCmd, "hand-over-paused"))
1402	{
1403	/*
1404	* Point of no return.
1405	*
1406	* Note! Since we cannot tell whether a VMR3Resume failure is
1407	* destructive for the source or not, we have little choice
1408	* but to ACK it first and take any failures locally.
1409	*
1410	* Ideally, we should try resume it first and then ACK (or
1411	* NACK) the request since this would reduce latency and
1412	* make it possible to recover from some VMR3Resume failures.
1413	*/
1414	if ( pState->mptrProgress->i_notifyPointOfNoReturn()
1415	&& pState->mfLockedMedia)
1416	{
1417	vrc = teleporterTcpWriteACK(pState);
1418	if (RT_SUCCESS(vrc))
1419	{
1420	if (!strcmp(szCmd, "hand-over-resume"))
1421	vrc = VMR3Resume(pState->mpUVM, VMRESUMEREASON_TELEPORTED);
1422	else
1423	pState->mptrConsole->i_setMachineState(MachineState_Paused);
1424	fDone = true;
1425	break;
1426	}
1427	}
1428	else
1429	{
1430	vrc = pState->mfLockedMedia ? VERR_WRONG_ORDER : VERR_SSM_CANCELLED;
1431	teleporterTcpWriteNACK(pState, vrc);
1432	}
1433	}
1434	else
1435	{
1436	LogRel(("Teleporter: Unknown command '%s' (%.*Rhxs)\n", szCmd, strlen(szCmd), szCmd));
1437	vrc = VERR_NOT_IMPLEMENTED;
1438	teleporterTcpWriteNACK(pState, vrc);
1439	}
1440
1441	if (RT_FAILURE(vrc))
1442	break;
1443	}
1444
1445	if (RT_SUCCESS(vrc) && !fDone)
1446	vrc = VERR_WRONG_ORDER;
1447	if (RT_FAILURE(vrc))
1448	teleporterTrgUnlockMedia(pState);
1449
1450	pState->mRc = vrc;
1451	pState->mhSocket = NIL_RTSOCKET;
1452	LogFlowFunc(("returns mRc=%Rrc\n", vrc));
1453	return VERR_TCP_SERVER_STOP;
1454	}
1455

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source: vbox/trunk/src/VBox/Main/src-client/ConsoleImplTeleporter.cpp@ 63418

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