ConsoleImplTeleporter.cpp@ 59747

Last change on this file since 59747 was 57358, checked in by vboxsync, 9 years ago
*: scm cleanup run.
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1	/* $Id: ConsoleImplTeleporter.cpp 57358 2015-08-14 15:16:38Z vboxsync $ */
2	/** @file
3	* VBox Console COM Class implementation, The Teleporter Part.
4	*/
5
6	/*
7	* Copyright (C) 2010-2015 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	}
147	};
148
149
150	/**
151	* TCP stream header.
152	*
153	* This is an extra layer for fixing the problem with figuring out when the SSM
154	* stream ends.
155	*/
156	typedef struct TELEPORTERTCPHDR
157	{
158	/** Magic value. */
159	uint32_t u32Magic;
160	/** The size of the data block following this header.
161	* 0 indicates the end of the stream, while UINT32_MAX indicates
162	* cancelation. */
163	uint32_t cb;
164	} TELEPORTERTCPHDR;
165	/** Magic value for TELEPORTERTCPHDR::u32Magic. (Egberto Gismonti Amin) */
166	#define TELEPORTERTCPHDR_MAGIC UINT32_C(0x19471205)
167	/** The max block size. */
168	#define TELEPORTERTCPHDR_MAX_SIZE UINT32_C(0x00fffff8)
169
170
171	/*********************************************************************************************************************************
172	* Global Variables *
173	*********************************************************************************************************************************/
174	static const char g_szWelcome[] = "VirtualBox-Teleporter-1.0\n";
175
176
177	/**
178	* Reads a string from the socket.
179	*
180	* @returns VBox status code.
181	*
182	* @param pState The teleporter state structure.
183	* @param pszBuf The output buffer.
184	* @param cchBuf The size of the output buffer.
185	*
186	*/
187	static int teleporterTcpReadLine(TeleporterState pState, char pszBuf, size_t cchBuf)
188	{
189	char *pszStart = pszBuf;
190	RTSOCKET Sock = pState->mhSocket;
191
192	AssertReturn(cchBuf > 1, VERR_INTERNAL_ERROR);
193	*pszBuf = '\0';
194
195	/* dead simple approach. */
196	for (;;)
197	{
198	char ch;
199	int rc = RTTcpRead(Sock, &ch, sizeof(ch), NULL);
200	if (RT_FAILURE(rc))
201	{
202	LogRel(("Teleporter: RTTcpRead -> %Rrc while reading string ('%s')\n", rc, pszStart));
203	return rc;
204	}
205	if ( ch == '\n'
206	\|\| ch == '\0')
207	return VINF_SUCCESS;
208	if (cchBuf <= 1)
209	{
210	LogRel(("Teleporter: String buffer overflow: '%s'\n", pszStart));
211	return VERR_BUFFER_OVERFLOW;
212	}
213	*pszBuf++ = ch;
214	*pszBuf = '\0';
215	cchBuf--;
216	}
217	}
218
219
220	/**
221	* Reads an ACK or NACK.
222	*
223	* @returns S_OK on ACK, E_FAIL+setError() on failure or NACK.
224	* @param pState The teleporter source state.
225	* @param pszWhich Which ACK is this this?
226	* @param pszNAckMsg Optional NACK message.
227	*
228	* @remarks the setError laziness forces this to be a Console member.
229	*/
230	HRESULT
231	Console::i_teleporterSrcReadACK(TeleporterStateSrc pState, const char pszWhich,
232	const char pszNAckMsg /= NULL*/)
233	{
234	char szMsg[256];
235	int vrc = teleporterTcpReadLine(pState, szMsg, sizeof(szMsg));
236	if (RT_FAILURE(vrc))
237	return setError(E_FAIL, tr("Failed reading ACK(%s): %Rrc"), pszWhich, vrc);
238
239	if (!strcmp(szMsg, "ACK"))
240	return S_OK;
241
242	if (!strncmp(szMsg, RT_STR_TUPLE("NACK=")))
243	{
244	char *pszMsgText = strchr(szMsg, ';');
245	if (pszMsgText)
246	*pszMsgText++ = '\0';
247
248	int32_t vrc2;
249	vrc = RTStrToInt32Full(&szMsg[sizeof("NACK=") - 1], 10, &vrc2);
250	if (vrc == VINF_SUCCESS)
251	{
252	/*
253	* Well formed NACK, transform it into an error.
254	*/
255	if (pszNAckMsg)
256	{
257	LogRel(("Teleporter: %s: NACK=%Rrc (%d)\n", pszWhich, vrc2, vrc2));
258	return setError(E_FAIL, pszNAckMsg);
259	}
260
261	if (pszMsgText)
262	{
263	pszMsgText = RTStrStrip(pszMsgText);
264	for (size_t off = 0; pszMsgText[off]; off++)
265	if (pszMsgText[off] == '\r')
266	pszMsgText[off] = '\n';
267
268	LogRel(("Teleporter: %s: NACK=%Rrc (%d) - '%s'\n", pszWhich, vrc2, vrc2, pszMsgText));
269	if (strlen(pszMsgText) > 4)
270	return setError(E_FAIL, "%s", pszMsgText);
271	return setError(E_FAIL, "NACK(%s) - %Rrc (%d) '%s'", pszWhich, vrc2, vrc2, pszMsgText);
272	}
273
274	return setError(E_FAIL, "NACK(%s) - %Rrc (%d)", pszWhich, vrc2, vrc2);
275	}
276
277	if (pszMsgText)
278	pszMsgText[-1] = ';';
279	}
280	return setError(E_FAIL, tr("%s: Expected ACK or NACK, got '%s'"), pszWhich, szMsg);
281	}
282
283
284	/**
285	* Submitts a command to the destination and waits for the ACK.
286	*
287	* @returns S_OK on ACKed command, E_FAIL+setError() on failure.
288	*
289	* @param pState The teleporter source state.
290	* @param pszCommand The command.
291	* @param fWaitForAck Whether to wait for the ACK.
292	*
293	* @remarks the setError laziness forces this to be a Console member.
294	*/
295	HRESULT Console::i_teleporterSrcSubmitCommand(TeleporterStateSrc pState, const char pszCommand, bool fWaitForAck /= true/)
296	{
297	int vrc = RTTcpSgWriteL(pState->mhSocket, 2, pszCommand, strlen(pszCommand), "\n", sizeof("\n") - 1);
298	if (RT_FAILURE(vrc))
299	return setError(E_FAIL, tr("Failed writing command '%s': %Rrc"), pszCommand, vrc);
300	if (!fWaitForAck)
301	return S_OK;
302	return i_teleporterSrcReadACK(pState, pszCommand);
303	}
304
305
306	/**
307	* @copydoc SSMSTRMOPS::pfnWrite
308	*/
309	static DECLCALLBACK(int) teleporterTcpOpWrite(void pvUser, uint64_t offStream, const void pvBuf, size_t cbToWrite)
310	{
311	TeleporterState pState = (TeleporterState )pvUser;
312
313	AssertReturn(cbToWrite > 0, VINF_SUCCESS);
314	AssertReturn(cbToWrite < UINT32_MAX, VERR_OUT_OF_RANGE);
315	AssertReturn(pState->mfIsSource, VERR_INVALID_HANDLE);
316
317	for (;;)
318	{
319	TELEPORTERTCPHDR Hdr;
320	Hdr.u32Magic = TELEPORTERTCPHDR_MAGIC;
321	Hdr.cb = RT_MIN((uint32_t)cbToWrite, TELEPORTERTCPHDR_MAX_SIZE);
322	int rc = RTTcpSgWriteL(pState->mhSocket, 2, &Hdr, sizeof(Hdr), pvBuf, (size_t)Hdr.cb);
323	if (RT_FAILURE(rc))
324	{
325	LogRel(("Teleporter/TCP: Write error: %Rrc (cb=%#x)\n", rc, Hdr.cb));
326	return rc;
327	}
328	pState->moffStream += Hdr.cb;
329	if (Hdr.cb == cbToWrite)
330	return VINF_SUCCESS;
331
332	/* advance */
333	cbToWrite -= Hdr.cb;
334	pvBuf = (uint8_t const *)pvBuf + Hdr.cb;
335	}
336	}
337
338
339	/**
340	* Selects and poll for close condition.
341	*
342	* We can use a relatively high poll timeout here since it's only used to get
343	* us out of error paths. In the normal cause of events, we'll get a
344	* end-of-stream header.
345	*
346	* @returns VBox status code.
347	*
348	* @param pState The teleporter state data.
349	*/
350	static int teleporterTcpReadSelect(TeleporterState *pState)
351	{
352	int rc;
353	do
354	{
355	rc = RTTcpSelectOne(pState->mhSocket, 1000);
356	if (RT_FAILURE(rc) && rc != VERR_TIMEOUT)
357	{
358	pState->mfIOError = true;
359	LogRel(("Teleporter/TCP: Header select error: %Rrc\n", rc));
360	break;
361	}
362	if (pState->mfStopReading)
363	{
364	rc = VERR_EOF;
365	break;
366	}
367	} while (rc == VERR_TIMEOUT);
368	return rc;
369	}
370
371
372	/**
373	* @copydoc SSMSTRMOPS::pfnRead
374	*/
375	static DECLCALLBACK(int) teleporterTcpOpRead(void pvUser, uint64_t offStream, void pvBuf, size_t cbToRead, size_t *pcbRead)
376	{
377	TeleporterState pState = (TeleporterState )pvUser;
378	AssertReturn(!pState->mfIsSource, VERR_INVALID_HANDLE);
379
380	for (;;)
381	{
382	int rc;
383
384	/*
385	* Check for various conditions and may have been signalled.
386	*/
387	if (pState->mfEndOfStream)
388	return VERR_EOF;
389	if (pState->mfStopReading)
390	return VERR_EOF;
391	if (pState->mfIOError)
392	return VERR_IO_GEN_FAILURE;
393
394	/*
395	* If there is no more data in the current block, read the next
396	* block header.
397	*/
398	if (!pState->mcbReadBlock)
399	{
400	rc = teleporterTcpReadSelect(pState);
401	if (RT_FAILURE(rc))
402	return rc;
403	TELEPORTERTCPHDR Hdr;
404	rc = RTTcpRead(pState->mhSocket, &Hdr, sizeof(Hdr), NULL);
405	if (RT_FAILURE(rc))
406	{
407	pState->mfIOError = true;
408	LogRel(("Teleporter/TCP: Header read error: %Rrc\n", rc));
409	return rc;
410	}
411
412	if (RT_UNLIKELY( Hdr.u32Magic != TELEPORTERTCPHDR_MAGIC
413	\|\| Hdr.cb > TELEPORTERTCPHDR_MAX_SIZE
414	\|\| Hdr.cb == 0))
415	{
416	if ( Hdr.u32Magic == TELEPORTERTCPHDR_MAGIC
417	&& ( Hdr.cb == 0
418	\|\| Hdr.cb == UINT32_MAX)
419	)
420	{
421	pState->mfEndOfStream = true;
422	pState->mcbReadBlock = 0;
423	return Hdr.cb ? VERR_SSM_CANCELLED : VERR_EOF;
424	}
425	pState->mfIOError = true;
426	LogRel(("Teleporter/TCP: Invalid block: u32Magic=%#x cb=%#x\n", Hdr.u32Magic, Hdr.cb));
427	return VERR_IO_GEN_FAILURE;
428	}
429
430	pState->mcbReadBlock = Hdr.cb;
431	if (pState->mfStopReading)
432	return VERR_EOF;
433	}
434
435	/*
436	* Read more data.
437	*/
438	rc = teleporterTcpReadSelect(pState);
439	if (RT_FAILURE(rc))
440	return rc;
441	uint32_t cb = (uint32_t)RT_MIN(pState->mcbReadBlock, cbToRead);
442	rc = RTTcpRead(pState->mhSocket, pvBuf, cb, pcbRead);
443	if (RT_FAILURE(rc))
444	{
445	pState->mfIOError = true;
446	LogRel(("Teleporter/TCP: Data read error: %Rrc (cb=%#x)\n", rc, cb));
447	return rc;
448	}
449	if (pcbRead)
450	{
451	cb = (uint32_t)*pcbRead;
452	pState->moffStream += cb;
453	pState->mcbReadBlock -= cb;
454	return VINF_SUCCESS;
455	}
456	pState->moffStream += cb;
457	pState->mcbReadBlock -= cb;
458	if (cbToRead == cb)
459	return VINF_SUCCESS;
460
461	/* Advance to the next block. */
462	cbToRead -= cb;
463	pvBuf = (uint8_t *)pvBuf + cb;
464	}
465	}
466
467
468	/**
469	* @copydoc SSMSTRMOPS::pfnSeek
470	*/
471	static DECLCALLBACK(int) teleporterTcpOpSeek(void pvUser, int64_t offSeek, unsigned uMethod, uint64_t poffActual)
472	{
473	return VERR_NOT_SUPPORTED;
474	}
475
476
477	/**
478	* @copydoc SSMSTRMOPS::pfnTell
479	*/
480	static DECLCALLBACK(uint64_t) teleporterTcpOpTell(void *pvUser)
481	{
482	TeleporterState pState = (TeleporterState )pvUser;
483	return pState->moffStream;
484	}
485
486
487	/**
488	* @copydoc SSMSTRMOPS::pfnSize
489	*/
490	static DECLCALLBACK(int) teleporterTcpOpSize(void pvUser, uint64_t pcb)
491	{
492	return VERR_NOT_SUPPORTED;
493	}
494
495
496	/**
497	* @copydoc SSMSTRMOPS::pfnIsOk
498	*/
499	static DECLCALLBACK(int) teleporterTcpOpIsOk(void *pvUser)
500	{
501	TeleporterState pState = (TeleporterState )pvUser;
502
503	if (pState->mfIsSource)
504	{
505	/* Poll for incoming NACKs and errors from the other side */
506	int rc = RTTcpSelectOne(pState->mhSocket, 0);
507	if (rc != VERR_TIMEOUT)
508	{
509	if (RT_SUCCESS(rc))
510	{
511	LogRel(("Teleporter/TCP: Incoming data detect by IsOk, assuming it is a cancellation NACK.\n"));
512	rc = VERR_SSM_CANCELLED;
513	}
514	else
515	LogRel(("Teleporter/TCP: RTTcpSelectOne -> %Rrc (IsOk).\n", rc));
516	return rc;
517	}
518	}
519
520	return VINF_SUCCESS;
521	}
522
523
524	/**
525	* @copydoc SSMSTRMOPS::pfnClose
526	*/
527	static DECLCALLBACK(int) teleporterTcpOpClose(void *pvUser, bool fCanceled)
528	{
529	TeleporterState pState = (TeleporterState )pvUser;
530
531	if (pState->mfIsSource)
532	{
533	TELEPORTERTCPHDR EofHdr;
534	EofHdr.u32Magic = TELEPORTERTCPHDR_MAGIC;
535	EofHdr.cb = fCanceled ? UINT32_MAX : 0;
536	int rc = RTTcpWrite(pState->mhSocket, &EofHdr, sizeof(EofHdr));
537	if (RT_FAILURE(rc))
538	{
539	LogRel(("Teleporter/TCP: EOF Header write error: %Rrc\n", rc));
540	return rc;
541	}
542	}
543	else
544	{
545	ASMAtomicWriteBool(&pState->mfStopReading, true);
546	}
547
548	return VINF_SUCCESS;
549	}
550
551
552	/**
553	* Method table for a TCP based stream.
554	*/
555	static SSMSTRMOPS const g_teleporterTcpOps =
556	{
557	SSMSTRMOPS_VERSION,
558	teleporterTcpOpWrite,
559	teleporterTcpOpRead,
560	teleporterTcpOpSeek,
561	teleporterTcpOpTell,
562	teleporterTcpOpSize,
563	teleporterTcpOpIsOk,
564	teleporterTcpOpClose,
565	SSMSTRMOPS_VERSION
566	};
567
568
569	/**
570	* Progress cancelation callback.
571	*/
572	static void teleporterProgressCancelCallback(void *pvUser)
573	{
574	TeleporterState pState = (TeleporterState )pvUser;
575	SSMR3Cancel(pState->mpUVM);
576	if (!pState->mfIsSource)
577	{
578	TeleporterStateTrg pStateTrg = (TeleporterStateTrg )pState;
579	RTTcpServerShutdown(pStateTrg->mhServer);
580	}
581	}
582
583	/**
584	* @copydoc PFNVMPROGRESS
585	*/
586	static DECLCALLBACK(int) teleporterProgressCallback(PUVM pUVM, unsigned uPercent, void *pvUser)
587	{
588	TeleporterState pState = (TeleporterState )pvUser;
589	if (pState->mptrProgress)
590	{
591	HRESULT hrc = pState->mptrProgress->SetCurrentOperationProgress(uPercent);
592	if (FAILED(hrc))
593	{
594	/* check if the failure was caused by cancellation. */
595	BOOL fCanceled;
596	hrc = pState->mptrProgress->COMGETTER(Canceled)(&fCanceled);
597	if (SUCCEEDED(hrc) && fCanceled)
598	{
599	SSMR3Cancel(pState->mpUVM);
600	return VERR_SSM_CANCELLED;
601	}
602	}
603	}
604
605	NOREF(pUVM);
606	return VINF_SUCCESS;
607	}
608
609
610	/**
611	* @copydoc FNRTTIMERLR
612	*/
613	static DECLCALLBACK(void) teleporterDstTimeout(RTTIMERLR hTimerLR, void *pvUser, uint64_t iTick)
614	{
615	/* This is harmless for any open connections. */
616	RTTcpServerShutdown((PRTTCPSERVER)pvUser);
617	}
618
619
620	/**
621	* Do the teleporter.
622	*
623	* @returns VBox status code.
624	* @param pState The teleporter state.
625	*/
626	HRESULT Console::i_teleporterSrc(TeleporterStateSrc *pState)
627	{
628	AutoCaller autoCaller(this);
629	if (FAILED(autoCaller.rc())) return autoCaller.rc();
630
631	/*
632	* Wait for Console::Teleport to change the state.
633	*/
634	{ AutoWriteLock autoLock(this COMMA_LOCKVAL_SRC_POS); }
635
636	BOOL fCanceled = TRUE;
637	HRESULT hrc = pState->mptrProgress->COMGETTER(Canceled)(&fCanceled);
638	if (FAILED(hrc))
639	return hrc;
640	if (fCanceled)
641	return setError(E_FAIL, tr("canceled"));
642
643	/*
644	* Try connect to the destination machine, disable Nagle.
645	* (Note. The caller cleans up mhSocket, so we can return without worries.)
646	*/
647	int vrc = RTTcpClientConnect(pState->mstrHostname.c_str(), pState->muPort, &pState->mhSocket);
648	if (RT_FAILURE(vrc))
649	return setError(E_FAIL, tr("Failed to connect to port %u on '%s': %Rrc"),
650	pState->muPort, pState->mstrHostname.c_str(), vrc);
651	vrc = RTTcpSetSendCoalescing(pState->mhSocket, false /fEnable/);
652	AssertRC(vrc);
653
654	/* Read and check the welcome message. */
655	char szLine[RT_MAX(128, sizeof(g_szWelcome))];
656	RT_ZERO(szLine);
657	vrc = RTTcpRead(pState->mhSocket, szLine, sizeof(g_szWelcome) - 1, NULL);
658	if (RT_FAILURE(vrc))
659	return setError(E_FAIL, tr("Failed to read welcome message: %Rrc"), vrc);
660	if (strcmp(szLine, g_szWelcome))
661	return setError(E_FAIL, tr("Unexpected welcome %.*Rhxs"), sizeof(g_szWelcome) - 1, szLine);
662
663	/* password */
664	pState->mstrPassword.append('\n');
665	vrc = RTTcpWrite(pState->mhSocket, pState->mstrPassword.c_str(), pState->mstrPassword.length());
666	if (RT_FAILURE(vrc))
667	return setError(E_FAIL, tr("Failed to send password: %Rrc"), vrc);
668
669	/* ACK */
670	hrc = i_teleporterSrcReadACK(pState, "password", tr("Invalid password"));
671	if (FAILED(hrc))
672	return hrc;
673
674	/*
675	* Start loading the state.
676	*
677	* Note! The saved state includes vital configuration data which will be
678	* verified against the VM config on the other end. This is all done
679	* in the first pass, so we should fail pretty promptly on misconfig.
680	*/
681	hrc = i_teleporterSrcSubmitCommand(pState, "load");
682	if (FAILED(hrc))
683	return hrc;
684
685	RTSocketRetain(pState->mhSocket);
686	void pvUser = static_cast<void >(static_cast<TeleporterState *>(pState));
687	vrc = VMR3Teleport(pState->mpUVM,
688	pState->mcMsMaxDowntime,
689	&g_teleporterTcpOps, pvUser,
690	teleporterProgressCallback, pvUser,
691	&pState->mfSuspendedByUs);
692	RTSocketRelease(pState->mhSocket);
693	if (RT_FAILURE(vrc))
694	{
695	if ( vrc == VERR_SSM_CANCELLED
696	&& RT_SUCCESS(RTTcpSelectOne(pState->mhSocket, 1)))
697	{
698	hrc = i_teleporterSrcReadACK(pState, "load-complete");
699	if (FAILED(hrc))
700	return hrc;
701	}
702	return setError(E_FAIL, tr("VMR3Teleport -> %Rrc"), vrc);
703	}
704
705	hrc = i_teleporterSrcReadACK(pState, "load-complete");
706	if (FAILED(hrc))
707	return hrc;
708
709	/*
710	* We're at the point of no return.
711	*/
712	if (!pState->mptrProgress->i_notifyPointOfNoReturn())
713	{
714	i_teleporterSrcSubmitCommand(pState, "cancel", false /fWaitForAck/);
715	return E_FAIL;
716	}
717
718	/*
719	* Hand over any media which we might be sharing.
720	*
721	* Note! This is only important on localhost teleportations.
722	*/
723	/** @todo Maybe we should only do this if it's a local teleportation... */
724	hrc = mControl->UnlockMedia();
725	if (FAILED(hrc))
726	return hrc;
727	pState->mfUnlockedMedia = true;
728
729	hrc = i_teleporterSrcSubmitCommand(pState, "lock-media");
730	if (FAILED(hrc))
731	return hrc;
732
733	/*
734	* The FINAL step is giving the target instructions how to proceed with the VM.
735	*/
736	if ( vrc == VINF_SSM_LIVE_SUSPENDED
737	\|\| pState->menmOldMachineState == MachineState_Paused)
738	hrc = i_teleporterSrcSubmitCommand(pState, "hand-over-paused");
739	else
740	hrc = i_teleporterSrcSubmitCommand(pState, "hand-over-resume");
741	if (FAILED(hrc))
742	return hrc;
743
744	/*
745	* teleporterSrcThreadWrapper will do the automatic power off because it
746	* has to release the AutoVMCaller.
747	*/
748	return S_OK;
749	}
750
751
752	/**
753	* Static thread method wrapper.
754	*
755	* @returns VINF_SUCCESS (ignored).
756	* @param hThread The thread.
757	* @param pvUser Pointer to a TeleporterStateSrc instance.
758	*/
759	/static/ DECLCALLBACK(int)
760	Console::i_teleporterSrcThreadWrapper(RTTHREAD hThread, void *pvUser)
761	{
762	TeleporterStateSrc pState = (TeleporterStateSrc )pvUser;
763
764	/*
765	* Console::teleporterSrc does the work, we just grab onto the VM handle
766	* and do the cleanups afterwards.
767	*/
768	SafeVMPtr ptrVM(pState->mptrConsole);
769	HRESULT hrc = ptrVM.rc();
770
771	if (SUCCEEDED(hrc))
772	hrc = pState->mptrConsole->i_teleporterSrc(pState);
773
774	/* Close the connection ASAP on so that the other side can complete. */
775	if (pState->mhSocket != NIL_RTSOCKET)
776	{
777	RTTcpClientClose(pState->mhSocket);
778	pState->mhSocket = NIL_RTSOCKET;
779	}
780
781	/* Aaarg! setMachineState trashes error info on Windows, so we have to
782	complete things here on failure instead of right before cleanup. */
783	if (FAILED(hrc))
784	pState->mptrProgress->i_notifyComplete(hrc);
785
786	/* We can no longer be canceled (success), or it doesn't matter any longer (failure). */
787	pState->mptrProgress->i_setCancelCallback(NULL, NULL);
788
789	/*
790	* Write lock the console before resetting mptrCancelableProgress and
791	* fixing the state.
792	*/
793	AutoWriteLock autoLock(pState->mptrConsole COMMA_LOCKVAL_SRC_POS);
794	pState->mptrConsole->mptrCancelableProgress.setNull();
795
796	VMSTATE const enmVMState = VMR3GetStateU(pState->mpUVM);
797	MachineState_T const enmMachineState = pState->mptrConsole->mMachineState;
798	if (SUCCEEDED(hrc))
799	{
800	/*
801	* Automatically shut down the VM on success.
802	*
803	* Note! We have to release the VM caller object or we'll deadlock in
804	* powerDown.
805	*/
806	AssertLogRelMsg(enmVMState == VMSTATE_SUSPENDED, ("%s\n", VMR3GetStateName(enmVMState)));
807	AssertLogRelMsg(enmMachineState == MachineState_TeleportingPausedVM,
808	("%s\n", Global::stringifyMachineState(enmMachineState)));
809
810	ptrVM.release();
811
812	pState->mptrConsole->mVMIsAlreadyPoweringOff = true; /* (Make sure we stick in the TeleportingPausedVM state.) */
813	autoLock.release();
814
815	hrc = pState->mptrConsole->i_powerDown();
816
817	autoLock.acquire();
818	pState->mptrConsole->mVMIsAlreadyPoweringOff = false;
819
820	pState->mptrProgress->i_notifyComplete(hrc);
821	}
822	else
823	{
824	/*
825	* Work the state machinery on failure.
826	*
827	* If the state is no longer 'Teleporting*', some other operation has
828	* canceled us and there is nothing we need to do here. In all other
829	* cases, we've failed one way or another.
830	*/
831	if ( enmMachineState == MachineState_Teleporting
832	\|\| enmMachineState == MachineState_TeleportingPausedVM
833	)
834	{
835	if (pState->mfUnlockedMedia)
836	{
837	ErrorInfoKeeper Oak;
838	HRESULT hrc2 = pState->mptrConsole->mControl->LockMedia();
839	if (FAILED(hrc2))
840	{
841	uint64_t StartMS = RTTimeMilliTS();
842	do
843	{
844	RTThreadSleep(2);
845	hrc2 = pState->mptrConsole->mControl->LockMedia();
846	} while ( FAILED(hrc2)
847	&& RTTimeMilliTS() - StartMS < 2000);
848	}
849	if (SUCCEEDED(hrc2))
850	pState->mfUnlockedMedia = true;
851	else
852	LogRel(("FATAL ERROR: Failed to re-take the media locks. hrc2=%Rhrc\n", hrc2));
853	}
854
855	switch (enmVMState)
856	{
857	case VMSTATE_RUNNING:
858	case VMSTATE_RUNNING_LS:
859	case VMSTATE_DEBUGGING:
860	case VMSTATE_DEBUGGING_LS:
861	case VMSTATE_POWERING_OFF:
862	case VMSTATE_POWERING_OFF_LS:
863	case VMSTATE_RESETTING:
864	case VMSTATE_RESETTING_LS:
865	Assert(!pState->mfSuspendedByUs);
866	Assert(!pState->mfUnlockedMedia);
867	pState->mptrConsole->i_setMachineState(MachineState_Running);
868	break;
869
870	case VMSTATE_GURU_MEDITATION:
871	case VMSTATE_GURU_MEDITATION_LS:
872	pState->mptrConsole->i_setMachineState(MachineState_Stuck);
873	break;
874
875	case VMSTATE_FATAL_ERROR:
876	case VMSTATE_FATAL_ERROR_LS:
877	pState->mptrConsole->i_setMachineState(MachineState_Paused);
878	break;
879
880	default:
881	AssertMsgFailed(("%s\n", VMR3GetStateName(enmVMState)));
882	case VMSTATE_SUSPENDED:
883	case VMSTATE_SUSPENDED_LS:
884	case VMSTATE_SUSPENDING:
885	case VMSTATE_SUSPENDING_LS:
886	case VMSTATE_SUSPENDING_EXT_LS:
887	if (!pState->mfUnlockedMedia)
888	{
889	pState->mptrConsole->i_setMachineState(MachineState_Paused);
890	if (pState->mfSuspendedByUs)
891	{
892	autoLock.release();
893	int rc = VMR3Resume(pState->mpUVM, VMRESUMEREASON_TELEPORT_FAILED);
894	AssertLogRelMsgRC(rc, ("VMR3Resume -> %Rrc\n", rc));
895	autoLock.acquire();
896	}
897	}
898	else
899	{
900	/* Faking a guru meditation is the best I can think of doing here... */
901	pState->mptrConsole->i_setMachineState(MachineState_Stuck);
902	}
903	break;
904	}
905	}
906	}
907	autoLock.release();
908
909	/*
910	* Cleanup.
911	*/
912	Assert(pState->mhSocket == NIL_RTSOCKET);
913	delete pState;
914
915	return VINF_SUCCESS; /* ignored */
916	}
917
918
919	/**
920	* Start teleporter to the specified target.
921	*
922	* @returns COM status code.
923	*
924	* @param aHostname The name of the target host.
925	* @param aPort The TCP port number.
926	* @param aPassword The password.
927	* @param aMaxDowntime Max allowed "downtime" in milliseconds.
928	* @param aProgress Where to return the progress object.
929	*/
930	HRESULT Console::teleport(const com::Utf8Str &aHostname, ULONG aTcpport, const com::Utf8Str &aPassword,
931	ULONG aMaxDowntime, ComPtr<IProgress> &aProgress)
932	{
933	/*
934	* Validate parameters, check+hold object status, write lock the object
935	* and validate the state.
936	*/
937	Utf8Str strPassword(aPassword);
938	if (!strPassword.isEmpty())
939	{
940	if (VBoxIsPasswordHashed(&strPassword))
941	return setError(E_INVALIDARG, tr("The specified password resembles a hashed password, expected plain text"));
942	VBoxHashPassword(&strPassword);
943	}
944
945	AutoCaller autoCaller(this);
946	if (FAILED(autoCaller.rc())) return autoCaller.rc();
947
948	AutoWriteLock autoLock(this COMMA_LOCKVAL_SRC_POS);
949	LogFlowThisFunc(("mMachineState=%d\n", mMachineState));
950
951	switch (mMachineState)
952	{
953	case MachineState_Running:
954	case MachineState_Paused:
955	break;
956
957	default:
958	return setError(VBOX_E_INVALID_VM_STATE,
959	tr("Invalid machine state: %s (must be Running or Paused)"),
960	Global::stringifyMachineState(mMachineState));
961	}
962
963
964	/*
965	* Create a progress object, spawn a worker thread and change the state.
966	* Note! The thread won't start working until we release the lock.
967	*/
968	LogFlowThisFunc(("Initiating TELEPORT request...\n"));
969
970	ComObjPtr<Progress> ptrProgress;
971	HRESULT hrc = ptrProgress.createObject();
972	if (SUCCEEDED(hrc))
973	hrc = ptrProgress->init(static_cast<IConsole *>(this),
974	Bstr(tr("Teleporter")).raw(),
975	TRUE /aCancelable/);
976	if (FAILED(hrc))
977	return hrc;
978
979	TeleporterStateSrc *pState = new TeleporterStateSrc(this, mpUVM, ptrProgress, mMachineState);
980	pState->mstrPassword = strPassword;
981	pState->mstrHostname = aHostname;
982	pState->muPort = aTcpport;
983	pState->mcMsMaxDowntime = aMaxDowntime;
984
985	void pvUser = static_cast<void >(static_cast<TeleporterState *>(pState));
986	ptrProgress->i_setCancelCallback(teleporterProgressCancelCallback, pvUser);
987
988	int vrc = RTThreadCreate(NULL, Console::i_teleporterSrcThreadWrapper, (void )pState, 0 /cbStack*/,
989	RTTHREADTYPE_EMULATION, 0 /fFlags/, "Teleport");
990	if (RT_SUCCESS(vrc))
991	{
992	if (mMachineState == MachineState_Running)
993	hrc = i_setMachineState(MachineState_Teleporting);
994	else
995	hrc = i_setMachineState(MachineState_TeleportingPausedVM);
996	if (SUCCEEDED(hrc))
997	{
998	ptrProgress.queryInterfaceTo(aProgress.asOutParam());
999	mptrCancelableProgress = aProgress;
1000	}
1001	else
1002	ptrProgress->Cancel();
1003	}
1004	else
1005	{
1006	ptrProgress->i_setCancelCallback(NULL, NULL);
1007	delete pState;
1008	hrc = setError(E_FAIL, tr("RTThreadCreate -> %Rrc"), vrc);
1009	}
1010
1011	return hrc;
1012	}
1013
1014
1015	/**
1016	* Creates a TCP server that listens for the source machine and passes control
1017	* over to Console::teleporterTrgServeConnection().
1018	*
1019	* @returns VBox status code.
1020	* @param pUVM The user-mode VM handle
1021	* @param pMachine The IMachine for the virtual machine.
1022	* @param pErrorMsg Pointer to the error string for VMSetError.
1023	* @param fStartPaused Whether to start it in the Paused (true) or
1024	* Running (false) state,
1025	* @param pProgress Pointer to the progress object.
1026	* @param pfPowerOffOnFailure Whether the caller should power off
1027	* the VM on failure.
1028	*
1029	* @remarks The caller expects error information to be set on failure.
1030	* @todo Check that all the possible failure paths sets error info...
1031	*/
1032	HRESULT Console::i_teleporterTrg(PUVM pUVM, IMachine pMachine, Utf8Str pErrorMsg, bool fStartPaused,
1033	Progress pProgress, bool pfPowerOffOnFailure)
1034	{
1035	LogThisFunc(("pUVM=%p pMachine=%p fStartPaused=%RTbool pProgress=%p\n", pUVM, pMachine, fStartPaused, pProgress));
1036
1037	*pfPowerOffOnFailure = true;
1038
1039	/*
1040	* Get the config.
1041	*/
1042	ULONG uPort;
1043	HRESULT hrc = pMachine->COMGETTER(TeleporterPort)(&uPort);
1044	if (FAILED(hrc))
1045	return hrc;
1046	ULONG const uPortOrg = uPort;
1047
1048	Bstr bstrAddress;
1049	hrc = pMachine->COMGETTER(TeleporterAddress)(bstrAddress.asOutParam());
1050	if (FAILED(hrc))
1051	return hrc;
1052	Utf8Str strAddress(bstrAddress);
1053	const char *pszAddress = strAddress.isEmpty() ? NULL : strAddress.c_str();
1054
1055	Bstr bstrPassword;
1056	hrc = pMachine->COMGETTER(TeleporterPassword)(bstrPassword.asOutParam());
1057	if (FAILED(hrc))
1058	return hrc;
1059	Utf8Str strPassword(bstrPassword);
1060	strPassword.append('\n'); /* To simplify password checking. */
1061
1062	/*
1063	* Create the TCP server.
1064	*/
1065	int vrc;
1066	PRTTCPSERVER hServer;
1067	if (uPort)
1068	vrc = RTTcpServerCreateEx(pszAddress, uPort, &hServer);
1069	else
1070	{
1071	for (int cTries = 10240; cTries > 0; cTries--)
1072	{
1073	uPort = RTRandU32Ex(cTries >= 8192 ? 49152 : 1024, 65534);
1074	vrc = RTTcpServerCreateEx(pszAddress, uPort, &hServer);
1075	if (vrc != VERR_NET_ADDRESS_IN_USE)
1076	break;
1077	}
1078	if (RT_SUCCESS(vrc))
1079	{
1080	hrc = pMachine->COMSETTER(TeleporterPort)(uPort);
1081	if (FAILED(hrc))
1082	{
1083	RTTcpServerDestroy(hServer);
1084	return hrc;
1085	}
1086	}
1087	}
1088	if (RT_FAILURE(vrc))
1089	return setError(E_FAIL, tr("RTTcpServerCreateEx failed with status %Rrc"), vrc);
1090
1091	/*
1092	* Create a one-shot timer for timing out after 5 mins.
1093	*/
1094	RTTIMERLR hTimerLR;
1095	vrc = RTTimerLRCreateEx(&hTimerLR, 0 /ns/, RTTIMER_FLAGS_CPU_ANY, teleporterDstTimeout, hServer);
1096	if (RT_SUCCESS(vrc))
1097	{
1098	vrc = RTTimerLRStart(hTimerLR, 560UINT64_C(1000000000) /ns/);
1099	if (RT_SUCCESS(vrc))
1100	{
1101	/*
1102	* Do the job, when it returns we're done.
1103	*/
1104	TeleporterStateTrg theState(this, pUVM, pProgress, pMachine, mControl, &hTimerLR, fStartPaused);
1105	theState.mstrPassword = strPassword;
1106	theState.mhServer = hServer;
1107
1108	void pvUser = static_cast<void >(static_cast<TeleporterState *>(&theState));
1109	if (pProgress->i_setCancelCallback(teleporterProgressCancelCallback, pvUser))
1110	{
1111	LogRel(("Teleporter: Waiting for incoming VM...\n"));
1112	hrc = pProgress->SetNextOperation(Bstr(tr("Waiting for incoming VM")).raw(), 1);
1113	if (SUCCEEDED(hrc))
1114	{
1115	vrc = RTTcpServerListen(hServer, Console::i_teleporterTrgServeConnection, &theState);
1116	pProgress->i_setCancelCallback(NULL, NULL);
1117
1118	if (vrc == VERR_TCP_SERVER_STOP)
1119	{
1120	vrc = theState.mRc;
1121	/* Power off the VM on failure unless the state callback
1122	already did that. */
1123	*pfPowerOffOnFailure = false;
1124	if (RT_SUCCESS(vrc))
1125	hrc = S_OK;
1126	else
1127	{
1128	VMSTATE enmVMState = VMR3GetStateU(pUVM);
1129	if ( enmVMState != VMSTATE_OFF
1130	&& enmVMState != VMSTATE_POWERING_OFF)
1131	*pfPowerOffOnFailure = true;
1132
1133	/* Set error. */
1134	if (pErrorMsg->length())
1135	hrc = setError(E_FAIL, "%s", pErrorMsg->c_str());
1136	else
1137	hrc = setError(E_FAIL, tr("Teleporation failed (%Rrc)"), vrc);
1138	}
1139	}
1140	else if (vrc == VERR_TCP_SERVER_SHUTDOWN)
1141	{
1142	BOOL fCanceled = TRUE;
1143	hrc = pProgress->COMGETTER(Canceled)(&fCanceled);
1144	if (FAILED(hrc) \|\| fCanceled)
1145	hrc = setError(E_FAIL, tr("Teleporting canceled"));
1146	else
1147	hrc = setError(E_FAIL, tr("Teleporter timed out waiting for incoming connection"));
1148	LogRel(("Teleporter: RTTcpServerListen aborted - %Rrc\n", vrc));
1149	}
1150	else
1151	{
1152	hrc = setError(E_FAIL, tr("Unexpected RTTcpServerListen status code %Rrc"), vrc);
1153	LogRel(("Teleporter: Unexpected RTTcpServerListen rc: %Rrc\n", vrc));
1154	}
1155	}
1156	else
1157	LogThisFunc(("SetNextOperation failed, %Rhrc\n", hrc));
1158	}
1159	else
1160	{
1161	LogThisFunc(("Canceled - check point #1\n"));
1162	hrc = setError(E_FAIL, tr("Teleporting canceled"));
1163	}
1164	}
1165	else
1166	hrc = setError(E_FAIL, "RTTimerLRStart -> %Rrc", vrc);
1167
1168	RTTimerLRDestroy(hTimerLR);
1169	}
1170	else
1171	hrc = setError(E_FAIL, "RTTimerLRCreate -> %Rrc", vrc);
1172	RTTcpServerDestroy(hServer);
1173
1174	/*
1175	* If we change TeleporterPort above, set it back to it's original
1176	* value before returning.
1177	*/
1178	if (uPortOrg != uPort)
1179	{
1180	ErrorInfoKeeper Eik;
1181	pMachine->COMSETTER(TeleporterPort)(uPortOrg);
1182	}
1183
1184	return hrc;
1185	}
1186
1187
1188	/**
1189	* Unlock the media.
1190	*
1191	* This is used in error paths.
1192	*
1193	* @param pState The teleporter state.
1194	*/
1195	static void teleporterTrgUnlockMedia(TeleporterStateTrg *pState)
1196	{
1197	if (pState->mfLockedMedia)
1198	{
1199	pState->mpControl->UnlockMedia();
1200	pState->mfLockedMedia = false;
1201	}
1202	}
1203
1204
1205	static int teleporterTcpWriteACK(TeleporterStateTrg *pState, bool fAutomaticUnlock = true)
1206	{
1207	int rc = RTTcpWrite(pState->mhSocket, "ACK\n", sizeof("ACK\n") - 1);
1208	if (RT_FAILURE(rc))
1209	{
1210	LogRel(("Teleporter: RTTcpWrite(,ACK,) -> %Rrc\n", rc));
1211	if (fAutomaticUnlock)
1212	teleporterTrgUnlockMedia(pState);
1213	}
1214	return rc;
1215	}
1216
1217
1218	static int teleporterTcpWriteNACK(TeleporterStateTrg pState, int32_t rc2, const char pszMsgText = NULL)
1219	{
1220	/*
1221	* Unlock media sending the NACK. That way the other doesn't have to spin
1222	* waiting to regain the locks.
1223	*/
1224	teleporterTrgUnlockMedia(pState);
1225
1226	char szMsg[256];
1227	size_t cch;
1228	if (pszMsgText && *pszMsgText)
1229	{
1230	cch = RTStrPrintf(szMsg, sizeof(szMsg), "NACK=%d;%s\n", rc2, pszMsgText);
1231	for (size_t off = 6; off + 1 < cch; off++)
1232	if (szMsg[off] == '\n')
1233	szMsg[off] = '\r';
1234	}
1235	else
1236	cch = RTStrPrintf(szMsg, sizeof(szMsg), "NACK=%d\n", rc2);
1237	int rc = RTTcpWrite(pState->mhSocket, szMsg, cch);
1238	if (RT_FAILURE(rc))
1239	LogRel(("Teleporter: RTTcpWrite(,%s,%zu) -> %Rrc\n", szMsg, cch, rc));
1240	return rc;
1241	}
1242
1243
1244	/**
1245	* @copydoc FNRTTCPSERVE
1246	*
1247	* @returns VINF_SUCCESS or VERR_TCP_SERVER_STOP.
1248	*/
1249	/static/ DECLCALLBACK(int)
1250	Console::i_teleporterTrgServeConnection(RTSOCKET Sock, void *pvUser)
1251	{
1252	TeleporterStateTrg pState = (TeleporterStateTrg )pvUser;
1253	pState->mhSocket = Sock;
1254
1255	/*
1256	* Disable Nagle and say hello.
1257	*/
1258	int vrc = RTTcpSetSendCoalescing(pState->mhSocket, false /fEnable/);
1259	AssertRC(vrc);
1260	vrc = RTTcpWrite(Sock, g_szWelcome, sizeof(g_szWelcome) - 1);
1261	if (RT_FAILURE(vrc))
1262	{
1263	LogRel(("Teleporter: Failed to write welcome message: %Rrc\n", vrc));
1264	return VINF_SUCCESS;
1265	}
1266
1267	/*
1268	* Password (includes '\n', see teleporterTrg).
1269	*/
1270	const char *pszPassword = pState->mstrPassword.c_str();
1271	unsigned off = 0;
1272	while (pszPassword[off])
1273	{
1274	char ch;
1275	vrc = RTTcpRead(Sock, &ch, sizeof(ch), NULL);
1276	if ( RT_FAILURE(vrc)
1277	\|\| pszPassword[off] != ch)
1278	{
1279	if (RT_FAILURE(vrc))
1280	LogRel(("Teleporter: Password read failure (off=%u): %Rrc\n", off, vrc));
1281	else
1282	LogRel(("Teleporter: Invalid password (off=%u)\n", off));
1283	teleporterTcpWriteNACK(pState, VERR_AUTHENTICATION_FAILURE);
1284	return VINF_SUCCESS;
1285	}
1286	off++;
1287	}
1288	vrc = teleporterTcpWriteACK(pState);
1289	if (RT_FAILURE(vrc))
1290	return VINF_SUCCESS;
1291
1292	/*
1293	* Update the progress bar, with peer name if available.
1294	*/
1295	HRESULT hrc;
1296	RTNETADDR Addr;
1297	vrc = RTTcpGetPeerAddress(Sock, &Addr);
1298	if (RT_SUCCESS(vrc))
1299	{
1300	LogRel(("Teleporter: Incoming VM from %RTnaddr!\n", &Addr));
1301	hrc = pState->mptrProgress->SetNextOperation(BstrFmt(tr("Teleporting VM from %RTnaddr"), &Addr).raw(), 8);
1302	}
1303	else
1304	{
1305	LogRel(("Teleporter: Incoming VM!\n"));
1306	hrc = pState->mptrProgress->SetNextOperation(Bstr(tr("Teleporting VM")).raw(), 8);
1307	}
1308	AssertMsg(SUCCEEDED(hrc) \|\| hrc == E_FAIL, ("%Rhrc\n", hrc));
1309
1310	/*
1311	* Stop the server and cancel the timeout timer.
1312	*
1313	* Note! After this point we must return VERR_TCP_SERVER_STOP, while prior
1314	* to it we must not return that value!
1315	*/
1316	RTTcpServerShutdown(pState->mhServer);
1317	RTTimerLRDestroy(*pState->mphTimerLR);
1318	*pState->mphTimerLR = NIL_RTTIMERLR;
1319
1320	/*
1321	* Command processing loop.
1322	*/
1323	bool fDone = false;
1324	for (;;)
1325	{
1326	char szCmd[128];
1327	vrc = teleporterTcpReadLine(pState, szCmd, sizeof(szCmd));
1328	if (RT_FAILURE(vrc))
1329	break;
1330
1331	if (!strcmp(szCmd, "load"))
1332	{
1333	vrc = teleporterTcpWriteACK(pState);
1334	if (RT_FAILURE(vrc))
1335	break;
1336
1337	int vrc2 = VMR3AtErrorRegister(pState->mpUVM,
1338	Console::i_genericVMSetErrorCallback, &pState->mErrorText); AssertRC(vrc2);
1339	RTSocketRetain(pState->mhSocket); /* For concurrent access by I/O thread and EMT. */
1340	pState->moffStream = 0;
1341
1342	void pvUser2 = static_cast<void >(static_cast<TeleporterState *>(pState));
1343	vrc = VMR3LoadFromStream(pState->mpUVM,
1344	&g_teleporterTcpOps, pvUser2,
1345	teleporterProgressCallback, pvUser2);
1346
1347	RTSocketRelease(pState->mhSocket);
1348	vrc2 = VMR3AtErrorDeregister(pState->mpUVM, Console::i_genericVMSetErrorCallback, &pState->mErrorText);
1349	AssertRC(vrc2);
1350
1351	if (RT_FAILURE(vrc))
1352	{
1353	LogRel(("Teleporter: VMR3LoadFromStream -> %Rrc\n", vrc));
1354	teleporterTcpWriteNACK(pState, vrc, pState->mErrorText.c_str());
1355	break;
1356	}
1357
1358	/* The EOS might not have been read, make sure it is. */
1359	pState->mfStopReading = false;
1360	size_t cbRead;
1361	vrc = teleporterTcpOpRead(pvUser2, pState->moffStream, szCmd, 1, &cbRead);
1362	if (vrc != VERR_EOF)
1363	{
1364	LogRel(("Teleporter: Draining teleporterTcpOpRead -> %Rrc\n", vrc));
1365	teleporterTcpWriteNACK(pState, vrc);
1366	break;
1367	}
1368
1369	vrc = teleporterTcpWriteACK(pState);
1370	}
1371	else if (!strcmp(szCmd, "cancel"))
1372	{
1373	/* Don't ACK this. */
1374	LogRel(("Teleporter: Received cancel command.\n"));
1375	vrc = VERR_SSM_CANCELLED;
1376	}
1377	else if (!strcmp(szCmd, "lock-media"))
1378	{
1379	hrc = pState->mpControl->LockMedia();
1380	if (SUCCEEDED(hrc))
1381	{
1382	pState->mfLockedMedia = true;
1383	vrc = teleporterTcpWriteACK(pState);
1384	}
1385	else
1386	{
1387	vrc = VERR_FILE_LOCK_FAILED;
1388	teleporterTcpWriteNACK(pState, vrc);
1389	}
1390	}
1391	else if ( !strcmp(szCmd, "hand-over-resume")
1392	\|\| !strcmp(szCmd, "hand-over-paused"))
1393	{
1394	/*
1395	* Point of no return.
1396	*
1397	* Note! Since we cannot tell whether a VMR3Resume failure is
1398	* destructive for the source or not, we have little choice
1399	* but to ACK it first and take any failures locally.
1400	*
1401	* Ideally, we should try resume it first and then ACK (or
1402	* NACK) the request since this would reduce latency and
1403	* make it possible to recover from some VMR3Resume failures.
1404	*/
1405	if ( pState->mptrProgress->i_notifyPointOfNoReturn()
1406	&& pState->mfLockedMedia)
1407	{
1408	vrc = teleporterTcpWriteACK(pState);
1409	if (RT_SUCCESS(vrc))
1410	{
1411	if (!strcmp(szCmd, "hand-over-resume"))
1412	vrc = VMR3Resume(pState->mpUVM, VMRESUMEREASON_TELEPORTED);
1413	else
1414	pState->mptrConsole->i_setMachineState(MachineState_Paused);
1415	fDone = true;
1416	break;
1417	}
1418	}
1419	else
1420	{
1421	vrc = pState->mfLockedMedia ? VERR_WRONG_ORDER : VERR_SSM_CANCELLED;
1422	teleporterTcpWriteNACK(pState, vrc);
1423	}
1424	}
1425	else
1426	{
1427	LogRel(("Teleporter: Unknown command '%s' (%.*Rhxs)\n", szCmd, strlen(szCmd), szCmd));
1428	vrc = VERR_NOT_IMPLEMENTED;
1429	teleporterTcpWriteNACK(pState, vrc);
1430	}
1431
1432	if (RT_FAILURE(vrc))
1433	break;
1434	}
1435
1436	if (RT_SUCCESS(vrc) && !fDone)
1437	vrc = VERR_WRONG_ORDER;
1438	if (RT_FAILURE(vrc))
1439	teleporterTrgUnlockMedia(pState);
1440
1441	pState->mRc = vrc;
1442	pState->mhSocket = NIL_RTSOCKET;
1443	LogFlowFunc(("returns mRc=%Rrc\n", vrc));
1444	return VERR_TCP_SERVER_STOP;
1445	}
1446

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source: vbox/trunk/src/VBox/Main/src-client/ConsoleImplTeleporter.cpp@ 59747

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