ConsoleImplTeleporter.cpp@ 96284

Last change on this file since 96284 was 94917, checked in by vboxsync, 3 years ago
Main/src-client/ConsoleImplTeleporter.cpp: Adjust to the new rules wrt. to rc -> hrc,vrc usage, bugref:10223
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
File size: 47.4 KB

Line
1	/* $Id: ConsoleImplTeleporter.cpp 94917 2022-05-08 19:39:41Z vboxsync $ */
2	/** @file
3	* VBox Console COM Class implementation, The Teleporter Part.
4	*/
5
6	/*
7	* Copyright (C) 2010-2022 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	#define LOG_GROUP LOG_GROUP_MAIN_CONSOLE
23	#include "LoggingNew.h"
24
25	#include "ConsoleImpl.h"
26	#include "ProgressImpl.h"
27	#include "Global.h"
28	#include "StringifyEnums.h"
29
30	#include "AutoCaller.h"
31	#include "HashedPw.h"
32
33	#include <iprt/asm.h>
34	#include <iprt/err.h>
35	#include <iprt/rand.h>
36	#include <iprt/socket.h>
37	#include <iprt/tcp.h>
38	#include <iprt/timer.h>
39
40	#include <VBox/vmm/vmapi.h>
41	#include <VBox/vmm/ssm.h>
42	#include <VBox/vmm/vmmr3vtable.h>
43	#include <VBox/err.h>
44	#include <VBox/version.h>
45	#include <VBox/com/string.h>
46	#include "VBox/com/ErrorInfo.h"
47
48
49	/*********************************************************************************************************************************
50	* Structures and Typedefs *
51	*********************************************************************************************************************************/
52	/**
53	* Base class for the teleporter state.
54	*
55	* These classes are used as advanced structs, not as proper classes.
56	*/
57	class TeleporterState
58	{
59	public:
60	ComPtr<Console> mptrConsole;
61	PUVM mpUVM;
62	PCVMMR3VTABLE mpVMM;
63	ComObjPtr<Progress> mptrProgress;
64	Utf8Str mstrPassword;
65	bool const mfIsSource;
66
67	/** @name stream stuff
68	* @{ */
69	RTSOCKET mhSocket;
70	uint64_t moffStream;
71	uint32_t mcbReadBlock;
72	bool volatile mfStopReading;
73	bool volatile mfEndOfStream;
74	bool volatile mfIOError;
75	/** @} */
76
77	TeleporterState(Console pConsole, PUVM pUVM, PCVMMR3VTABLE pVMM, Progress pProgress, bool fIsSource)
78	: mptrConsole(pConsole)
79	, mpUVM(pUVM)
80	, mpVMM(pVMM)
81	, mptrProgress(pProgress)
82	, mfIsSource(fIsSource)
83	, mhSocket(NIL_RTSOCKET)
84	, moffStream(UINT64_MAX / 2)
85	, mcbReadBlock(0)
86	, mfStopReading(false)
87	, mfEndOfStream(false)
88	, mfIOError(false)
89	{
90	pVMM->pfnVMR3RetainUVM(mpUVM);
91	}
92
93	~TeleporterState()
94	{
95	if (mpVMM)
96	mpVMM->pfnVMR3ReleaseUVM(mpUVM);
97	mpUVM = NULL;
98	}
99	};
100
101
102	/**
103	* Teleporter state used by the source side.
104	*/
105	class TeleporterStateSrc : public TeleporterState
106	{
107	public:
108	Utf8Str mstrHostname;
109	uint32_t muPort;
110	uint32_t mcMsMaxDowntime;
111	MachineState_T menmOldMachineState;
112	bool mfSuspendedByUs;
113	bool mfUnlockedMedia;
114
115	TeleporterStateSrc(Console pConsole, PUVM pUVM, PCVMMR3VTABLE pVMM, Progress pProgress, MachineState_T enmOldMachineState)
116	: TeleporterState(pConsole, pUVM, pVMM, pProgress, true /fIsSource/)
117	, muPort(UINT32_MAX)
118	, mcMsMaxDowntime(250)
119	, menmOldMachineState(enmOldMachineState)
120	, mfSuspendedByUs(false)
121	, mfUnlockedMedia(false)
122	{
123	}
124	};
125
126
127	/**
128	* Teleporter state used by the destination side.
129	*/
130	class TeleporterStateTrg : public TeleporterState
131	{
132	public:
133	IMachine *mpMachine;
134	IInternalMachineControl *mpControl;
135	PRTTCPSERVER mhServer;
136	PRTTIMERLR mphTimerLR;
137	bool mfLockedMedia;
138	int mRc;
139	Utf8Str mErrorText;
140
141	TeleporterStateTrg(Console pConsole, PUVM pUVM, PCVMMR3VTABLE pVMM, Progress pProgress,
142	IMachine pMachine, IInternalMachineControl pControl,
143	PRTTIMERLR phTimerLR, bool fStartPaused)
144	: TeleporterState(pConsole, pUVM, pVMM, pProgress, false /fIsSource/)
145	, mpMachine(pMachine)
146	, mpControl(pControl)
147	, mhServer(NULL)
148	, mphTimerLR(phTimerLR)
149	, mfLockedMedia(false)
150	, mRc(VINF_SUCCESS)
151	, mErrorText()
152	{
153	RT_NOREF(fStartPaused); /** @todo figure out why fStartPaused isn't used */
154	}
155	};
156
157
158	/**
159	* TCP stream header.
160	*
161	* This is an extra layer for fixing the problem with figuring out when the SSM
162	* stream ends.
163	*/
164	typedef struct TELEPORTERTCPHDR
165	{
166	/** Magic value. */
167	uint32_t u32Magic;
168	/** The size of the data block following this header.
169	* 0 indicates the end of the stream, while UINT32_MAX indicates
170	* cancelation. */
171	uint32_t cb;
172	} TELEPORTERTCPHDR;
173	/** Magic value for TELEPORTERTCPHDR::u32Magic. (Egberto Gismonti Amin) */
174	#define TELEPORTERTCPHDR_MAGIC UINT32_C(0x19471205)
175	/** The max block size. */
176	#define TELEPORTERTCPHDR_MAX_SIZE UINT32_C(0x00fffff8)
177
178
179	/*********************************************************************************************************************************
180	* Global Variables *
181	*********************************************************************************************************************************/
182	static const char g_szWelcome[] = "VirtualBox-Teleporter-1.0\n";
183
184
185	/**
186	* Reads a string from the socket.
187	*
188	* @returns VBox status code.
189	*
190	* @param pState The teleporter state structure.
191	* @param pszBuf The output buffer.
192	* @param cchBuf The size of the output buffer.
193	*
194	*/
195	static int teleporterTcpReadLine(TeleporterState pState, char pszBuf, size_t cchBuf)
196	{
197	char *pszStart = pszBuf;
198	RTSOCKET hSocket = pState->mhSocket;
199
200	AssertReturn(cchBuf > 1, VERR_INTERNAL_ERROR);
201	*pszBuf = '\0';
202
203	/* dead simple approach. */
204	for (;;)
205	{
206	char ch;
207	int vrc = RTTcpRead(hSocket, &ch, sizeof(ch), NULL);
208	if (RT_FAILURE(vrc))
209	{
210	LogRel(("Teleporter: RTTcpRead -> %Rrc while reading string ('%s')\n", vrc, pszStart));
211	return vrc;
212	}
213	if ( ch == '\n'
214	\|\| ch == '\0')
215	return VINF_SUCCESS;
216	if (cchBuf <= 1)
217	{
218	LogRel(("Teleporter: String buffer overflow: '%s'\n", pszStart));
219	return VERR_BUFFER_OVERFLOW;
220	}
221	*pszBuf++ = ch;
222	*pszBuf = '\0';
223	cchBuf--;
224	}
225	}
226
227
228	/**
229	* Reads an ACK or NACK.
230	*
231	* @returns S_OK on ACK, E_FAIL+setError() on failure or NACK.
232	* @param pState The teleporter source state.
233	* @param pszWhich Which ACK is this this?
234	* @param pszNAckMsg Optional NACK message.
235	*
236	* @remarks the setError laziness forces this to be a Console member.
237	*/
238	HRESULT
239	Console::i_teleporterSrcReadACK(TeleporterStateSrc pState, const char pszWhich, const char pszNAckMsg /= NULL*/)
240	{
241	char szMsg[256];
242	int vrc = teleporterTcpReadLine(pState, szMsg, sizeof(szMsg));
243	if (RT_FAILURE(vrc))
244	return setErrorBoth(E_FAIL, vrc, tr("Failed reading ACK(%s): %Rrc"), pszWhich, vrc);
245
246	if (!strcmp(szMsg, "ACK"))
247	return S_OK;
248
249	if (!strncmp(szMsg, RT_STR_TUPLE("NACK=")))
250	{
251	char *pszMsgText = strchr(szMsg, ';');
252	if (pszMsgText)
253	*pszMsgText++ = '\0';
254
255	int32_t vrc2;
256	vrc = RTStrToInt32Full(&szMsg[sizeof("NACK=") - 1], 10, &vrc2);
257	if (vrc == VINF_SUCCESS)
258	{
259	/*
260	* Well formed NACK, transform it into an error.
261	*/
262	if (pszNAckMsg)
263	{
264	LogRel(("Teleporter: %s: NACK=%Rrc (%d)\n", pszWhich, vrc2, vrc2));
265	return setError(E_FAIL, pszNAckMsg);
266	}
267
268	if (pszMsgText)
269	{
270	pszMsgText = RTStrStrip(pszMsgText);
271	for (size_t off = 0; pszMsgText[off]; off++)
272	if (pszMsgText[off] == '\r')
273	pszMsgText[off] = '\n';
274
275	LogRel(("Teleporter: %s: NACK=%Rrc (%d) - '%s'\n", pszWhich, vrc2, vrc2, pszMsgText));
276	if (strlen(pszMsgText) > 4)
277	return setError(E_FAIL, "%s", pszMsgText);
278	return setError(E_FAIL, "NACK(%s) - %Rrc (%d) '%s'", pszWhich, vrc2, vrc2, pszMsgText);
279	}
280
281	return setError(E_FAIL, "NACK(%s) - %Rrc (%d)", pszWhich, vrc2, vrc2);
282	}
283
284	if (pszMsgText)
285	pszMsgText[-1] = ';';
286	}
287	return setError(E_FAIL, tr("%s: Expected ACK or NACK, got '%s'"), pszWhich, szMsg);
288	}
289
290
291	/**
292	* Submitts a command to the destination and waits for the ACK.
293	*
294	* @returns S_OK on ACKed command, E_FAIL+setError() on failure.
295	*
296	* @param pState The teleporter source state.
297	* @param pszCommand The command.
298	* @param fWaitForAck Whether to wait for the ACK.
299	*
300	* @remarks the setError laziness forces this to be a Console member.
301	*/
302	HRESULT Console::i_teleporterSrcSubmitCommand(TeleporterStateSrc pState, const char pszCommand, bool fWaitForAck /= true/)
303	{
304	int vrc = RTTcpSgWriteL(pState->mhSocket, 2, pszCommand, strlen(pszCommand), "\n", sizeof("\n") - 1);
305	if (RT_FAILURE(vrc))
306	return setErrorBoth(E_FAIL, vrc, tr("Failed writing command '%s': %Rrc"), pszCommand, vrc);
307	if (!fWaitForAck)
308	return S_OK;
309	return i_teleporterSrcReadACK(pState, pszCommand);
310	}
311
312
313	/**
314	* @copydoc SSMSTRMOPS::pfnWrite
315	*/
316	static DECLCALLBACK(int) teleporterTcpOpWrite(void pvUser, uint64_t offStream, const void pvBuf, size_t cbToWrite)
317	{
318	RT_NOREF(offStream);
319	TeleporterState pState = (TeleporterState )pvUser;
320
321	AssertReturn(cbToWrite > 0, VINF_SUCCESS);
322	AssertReturn(cbToWrite < UINT32_MAX, VERR_OUT_OF_RANGE);
323	AssertReturn(pState->mfIsSource, VERR_INVALID_HANDLE);
324
325	for (;;)
326	{
327	TELEPORTERTCPHDR Hdr;
328	Hdr.u32Magic = TELEPORTERTCPHDR_MAGIC;
329	Hdr.cb = RT_MIN((uint32_t)cbToWrite, TELEPORTERTCPHDR_MAX_SIZE);
330	int vrc = RTTcpSgWriteL(pState->mhSocket, 2, &Hdr, sizeof(Hdr), pvBuf, (size_t)Hdr.cb);
331	if (RT_FAILURE(vrc))
332	{
333	LogRel(("Teleporter/TCP: Write error: %Rrc (cb=%#x)\n", vrc, Hdr.cb));
334	return vrc;
335	}
336	pState->moffStream += Hdr.cb;
337	if (Hdr.cb == cbToWrite)
338	return VINF_SUCCESS;
339
340	/* advance */
341	cbToWrite -= Hdr.cb;
342	pvBuf = (uint8_t const *)pvBuf + Hdr.cb;
343	}
344	}
345
346
347	/**
348	* Selects and poll for close condition.
349	*
350	* We can use a relatively high poll timeout here since it's only used to get
351	* us out of error paths. In the normal cause of events, we'll get a
352	* end-of-stream header.
353	*
354	* @returns VBox status code.
355	*
356	* @param pState The teleporter state data.
357	*/
358	static int teleporterTcpReadSelect(TeleporterState *pState)
359	{
360	int vrc;
361	do
362	{
363	vrc = RTTcpSelectOne(pState->mhSocket, 1000);
364	if (RT_FAILURE(vrc) && vrc != VERR_TIMEOUT)
365	{
366	pState->mfIOError = true;
367	LogRel(("Teleporter/TCP: Header select error: %Rrc\n", vrc));
368	break;
369	}
370	if (pState->mfStopReading)
371	{
372	vrc = VERR_EOF;
373	break;
374	}
375	} while (vrc == VERR_TIMEOUT);
376	return vrc;
377	}
378
379
380	/**
381	* @copydoc SSMSTRMOPS::pfnRead
382	*/
383	static DECLCALLBACK(int) teleporterTcpOpRead(void pvUser, uint64_t offStream, void pvBuf, size_t cbToRead, size_t *pcbRead)
384	{
385	RT_NOREF(offStream);
386	TeleporterState pState = (TeleporterState )pvUser;
387	AssertReturn(!pState->mfIsSource, VERR_INVALID_HANDLE);
388
389	for (;;)
390	{
391	int vrc;
392
393	/*
394	* Check for various conditions and may have been signalled.
395	*/
396	if (pState->mfEndOfStream)
397	return VERR_EOF;
398	if (pState->mfStopReading)
399	return VERR_EOF;
400	if (pState->mfIOError)
401	return VERR_IO_GEN_FAILURE;
402
403	/*
404	* If there is no more data in the current block, read the next
405	* block header.
406	*/
407	if (!pState->mcbReadBlock)
408	{
409	vrc = teleporterTcpReadSelect(pState);
410	if (RT_FAILURE(vrc))
411	return vrc;
412	TELEPORTERTCPHDR Hdr;
413	vrc = RTTcpRead(pState->mhSocket, &Hdr, sizeof(Hdr), NULL);
414	if (RT_FAILURE(vrc))
415	{
416	pState->mfIOError = true;
417	LogRel(("Teleporter/TCP: Header read error: %Rrc\n", vrc));
418	return vrc;
419	}
420
421	if (RT_UNLIKELY( Hdr.u32Magic != TELEPORTERTCPHDR_MAGIC
422	\|\| Hdr.cb > TELEPORTERTCPHDR_MAX_SIZE
423	\|\| Hdr.cb == 0))
424	{
425	if ( Hdr.u32Magic == TELEPORTERTCPHDR_MAGIC
426	&& ( Hdr.cb == 0
427	\|\| Hdr.cb == UINT32_MAX)
428	)
429	{
430	pState->mfEndOfStream = true;
431	pState->mcbReadBlock = 0;
432	return Hdr.cb ? VERR_SSM_CANCELLED : VERR_EOF;
433	}
434	pState->mfIOError = true;
435	LogRel(("Teleporter/TCP: Invalid block: u32Magic=%#x cb=%#x\n", Hdr.u32Magic, Hdr.cb));
436	return VERR_IO_GEN_FAILURE;
437	}
438
439	pState->mcbReadBlock = Hdr.cb;
440	if (pState->mfStopReading)
441	return VERR_EOF;
442	}
443
444	/*
445	* Read more data.
446	*/
447	vrc = teleporterTcpReadSelect(pState);
448	if (RT_FAILURE(vrc))
449	return vrc;
450	uint32_t cb = (uint32_t)RT_MIN(pState->mcbReadBlock, cbToRead);
451	vrc = RTTcpRead(pState->mhSocket, pvBuf, cb, pcbRead);
452	if (RT_FAILURE(vrc))
453	{
454	pState->mfIOError = true;
455	LogRel(("Teleporter/TCP: Data read error: %Rrc (cb=%#x)\n", vrc, cb));
456	return vrc;
457	}
458	if (pcbRead)
459	{
460	cb = (uint32_t)*pcbRead;
461	pState->moffStream += cb;
462	pState->mcbReadBlock -= cb;
463	return VINF_SUCCESS;
464	}
465	pState->moffStream += cb;
466	pState->mcbReadBlock -= cb;
467	if (cbToRead == cb)
468	return VINF_SUCCESS;
469
470	/* Advance to the next block. */
471	cbToRead -= cb;
472	pvBuf = (uint8_t *)pvBuf + cb;
473	}
474	}
475
476
477	/**
478	* @copydoc SSMSTRMOPS::pfnSeek
479	*/
480	static DECLCALLBACK(int) teleporterTcpOpSeek(void pvUser, int64_t offSeek, unsigned uMethod, uint64_t poffActual)
481	{
482	RT_NOREF(pvUser, offSeek, uMethod, poffActual);
483	return VERR_NOT_SUPPORTED;
484	}
485
486
487	/**
488	* @copydoc SSMSTRMOPS::pfnTell
489	*/
490	static DECLCALLBACK(uint64_t) teleporterTcpOpTell(void *pvUser)
491	{
492	TeleporterState pState = (TeleporterState )pvUser;
493	return pState->moffStream;
494	}
495
496
497	/**
498	* @copydoc SSMSTRMOPS::pfnSize
499	*/
500	static DECLCALLBACK(int) teleporterTcpOpSize(void pvUser, uint64_t pcb)
501	{
502	RT_NOREF(pvUser, pcb);
503	return VERR_NOT_SUPPORTED;
504	}
505
506
507	/**
508	* @copydoc SSMSTRMOPS::pfnIsOk
509	*/
510	static DECLCALLBACK(int) teleporterTcpOpIsOk(void *pvUser)
511	{
512	TeleporterState pState = (TeleporterState )pvUser;
513
514	if (pState->mfIsSource)
515	{
516	/* Poll for incoming NACKs and errors from the other side */
517	int vrc = RTTcpSelectOne(pState->mhSocket, 0);
518	if (vrc != VERR_TIMEOUT)
519	{
520	if (RT_SUCCESS(vrc))
521	{
522	LogRel(("Teleporter/TCP: Incoming data detect by IsOk, assuming it is a cancellation NACK.\n"));
523	vrc = VERR_SSM_CANCELLED;
524	}
525	else
526	LogRel(("Teleporter/TCP: RTTcpSelectOne -> %Rrc (IsOk).\n", vrc));
527	return vrc;
528	}
529	}
530
531	return VINF_SUCCESS;
532	}
533
534
535	/**
536	* @copydoc SSMSTRMOPS::pfnClose
537	*/
538	static DECLCALLBACK(int) teleporterTcpOpClose(void *pvUser, bool fCancelled)
539	{
540	TeleporterState pState = (TeleporterState )pvUser;
541
542	if (pState->mfIsSource)
543	{
544	TELEPORTERTCPHDR EofHdr;
545	EofHdr.u32Magic = TELEPORTERTCPHDR_MAGIC;
546	EofHdr.cb = fCancelled ? UINT32_MAX : 0;
547	int vrc = RTTcpWrite(pState->mhSocket, &EofHdr, sizeof(EofHdr));
548	if (RT_FAILURE(vrc))
549	{
550	LogRel(("Teleporter/TCP: EOF Header write error: %Rrc\n", vrc));
551	return vrc;
552	}
553	}
554	else
555	{
556	ASMAtomicWriteBool(&pState->mfStopReading, true);
557	}
558
559	return VINF_SUCCESS;
560	}
561
562
563	/**
564	* Method table for a TCP based stream.
565	*/
566	static SSMSTRMOPS const g_teleporterTcpOps =
567	{
568	SSMSTRMOPS_VERSION,
569	teleporterTcpOpWrite,
570	teleporterTcpOpRead,
571	teleporterTcpOpSeek,
572	teleporterTcpOpTell,
573	teleporterTcpOpSize,
574	teleporterTcpOpIsOk,
575	teleporterTcpOpClose,
576	SSMSTRMOPS_VERSION
577	};
578
579
580	/**
581	* Progress cancelation callback.
582	*/
583	static void teleporterProgressCancelCallback(void *pvUser)
584	{
585	TeleporterState pState = (TeleporterState )pvUser;
586	pState->mpVMM->pfnSSMR3Cancel(pState->mpUVM);
587	if (!pState->mfIsSource)
588	{
589	TeleporterStateTrg pStateTrg = (TeleporterStateTrg )pState;
590	RTTcpServerShutdown(pStateTrg->mhServer);
591	}
592	}
593
594	/**
595	* @copydoc PFNVMPROGRESS
596	*/
597	static DECLCALLBACK(int) teleporterProgressCallback(PUVM pUVM, unsigned uPercent, void *pvUser)
598	{
599	TeleporterState pState = (TeleporterState )pvUser;
600	if (pState->mptrProgress)
601	{
602	HRESULT hrc = pState->mptrProgress->SetCurrentOperationProgress(uPercent);
603	if (FAILED(hrc))
604	{
605	/* check if the failure was caused by cancellation. */
606	BOOL fCanceled;
607	hrc = pState->mptrProgress->COMGETTER(Canceled)(&fCanceled);
608	if (SUCCEEDED(hrc) && fCanceled)
609	{
610	pState->mpVMM->pfnSSMR3Cancel(pState->mpUVM);
611	return VERR_SSM_CANCELLED;
612	}
613	}
614	}
615
616	NOREF(pUVM);
617	return VINF_SUCCESS;
618	}
619
620
621	/**
622	* @copydoc FNRTTIMERLR
623	*/
624	static DECLCALLBACK(void) teleporterDstTimeout(RTTIMERLR hTimerLR, void *pvUser, uint64_t iTick)
625	{
626	RT_NOREF(hTimerLR, iTick);
627	/* This is harmless for any open connections. */
628	RTTcpServerShutdown((PRTTCPSERVER)pvUser);
629	}
630
631
632	/**
633	* Do the teleporter.
634	*
635	* @returns VBox status code.
636	* @param pState The teleporter state.
637	*/
638	HRESULT Console::i_teleporterSrc(TeleporterStateSrc *pState)
639	{
640	AutoCaller autoCaller(this);
641	if (FAILED(autoCaller.rc())) return autoCaller.rc();
642
643	/*
644	* Wait for Console::Teleport to change the state.
645	*/
646	{ AutoWriteLock autoLock(this COMMA_LOCKVAL_SRC_POS); }
647
648	BOOL fCanceled = TRUE;
649	HRESULT hrc = pState->mptrProgress->COMGETTER(Canceled)(&fCanceled);
650	if (FAILED(hrc))
651	return hrc;
652	if (fCanceled)
653	return setError(E_FAIL, tr("canceled"));
654
655	/*
656	* Try connect to the destination machine, disable Nagle.
657	* (Note. The caller cleans up mhSocket, so we can return without worries.)
658	*/
659	int vrc = RTTcpClientConnect(pState->mstrHostname.c_str(), pState->muPort, &pState->mhSocket);
660	if (RT_FAILURE(vrc))
661	return setErrorBoth(E_FAIL, vrc, tr("Failed to connect to port %u on '%s': %Rrc"),
662	pState->muPort, pState->mstrHostname.c_str(), vrc);
663	vrc = RTTcpSetSendCoalescing(pState->mhSocket, false /fEnable/);
664	AssertRC(vrc);
665
666	/* Read and check the welcome message. */
667	char szLine[RT_MAX(128, sizeof(g_szWelcome))];
668	RT_ZERO(szLine);
669	vrc = RTTcpRead(pState->mhSocket, szLine, sizeof(g_szWelcome) - 1, NULL);
670	if (RT_FAILURE(vrc))
671	return setErrorBoth(E_FAIL, vrc, tr("Failed to read welcome message: %Rrc"), vrc);
672	if (strcmp(szLine, g_szWelcome))
673	return setError(E_FAIL, tr("Unexpected welcome %.*Rhxs"), sizeof(g_szWelcome) - 1, szLine);
674
675	/* password */
676	pState->mstrPassword.append('\n');
677	vrc = RTTcpWrite(pState->mhSocket, pState->mstrPassword.c_str(), pState->mstrPassword.length());
678	if (RT_FAILURE(vrc))
679	return setErrorBoth(E_FAIL, vrc, tr("Failed to send password: %Rrc"), vrc);
680
681	/* ACK */
682	hrc = i_teleporterSrcReadACK(pState, "password", tr("Invalid password"));
683	if (FAILED(hrc))
684	return hrc;
685
686	/*
687	* Start loading the state.
688	*
689	* Note! The saved state includes vital configuration data which will be
690	* verified against the VM config on the other end. This is all done
691	* in the first pass, so we should fail pretty promptly on misconfig.
692	*/
693	hrc = i_teleporterSrcSubmitCommand(pState, "load");
694	if (FAILED(hrc))
695	return hrc;
696
697	RTSocketRetain(pState->mhSocket);
698	void pvUser = static_cast<void >(static_cast<TeleporterState *>(pState));
699	vrc = pState->mpVMM->pfnVMR3Teleport(pState->mpUVM,
700	pState->mcMsMaxDowntime,
701	&g_teleporterTcpOps, pvUser,
702	teleporterProgressCallback, pvUser,
703	&pState->mfSuspendedByUs);
704	RTSocketRelease(pState->mhSocket);
705	if (RT_FAILURE(vrc))
706	{
707	if ( vrc == VERR_SSM_CANCELLED
708	&& RT_SUCCESS(RTTcpSelectOne(pState->mhSocket, 1)))
709	{
710	hrc = i_teleporterSrcReadACK(pState, "load-complete");
711	if (FAILED(hrc))
712	return hrc;
713	}
714	return setErrorBoth(E_FAIL, vrc, "VMR3Teleport -> %Rrc", vrc);
715	}
716
717	hrc = i_teleporterSrcReadACK(pState, "load-complete");
718	if (FAILED(hrc))
719	return hrc;
720
721	/*
722	* We're at the point of no return.
723	*/
724	if (FAILED(pState->mptrProgress->NotifyPointOfNoReturn()))
725	{
726	i_teleporterSrcSubmitCommand(pState, "cancel", false /fWaitForAck/);
727	return E_FAIL;
728	}
729
730	/*
731	* Hand over any media which we might be sharing.
732	*
733	* Note! This is only important on localhost teleportations.
734	*/
735	/** @todo Maybe we should only do this if it's a local teleportation... */
736	hrc = mControl->UnlockMedia();
737	if (FAILED(hrc))
738	return hrc;
739	pState->mfUnlockedMedia = true;
740
741	hrc = i_teleporterSrcSubmitCommand(pState, "lock-media");
742	if (FAILED(hrc))
743	return hrc;
744
745	/*
746	* The FINAL step is giving the target instructions how to proceed with the VM.
747	*/
748	if ( vrc == VINF_SSM_LIVE_SUSPENDED
749	\|\| pState->menmOldMachineState == MachineState_Paused)
750	hrc = i_teleporterSrcSubmitCommand(pState, "hand-over-paused");
751	else
752	hrc = i_teleporterSrcSubmitCommand(pState, "hand-over-resume");
753	if (FAILED(hrc))
754	return hrc;
755
756	/*
757	* teleporterSrcThreadWrapper will do the automatic power off because it
758	* has to release the AutoVMCaller.
759	*/
760	return S_OK;
761	}
762
763
764	/**
765	* Static thread method wrapper.
766	*
767	* @returns VINF_SUCCESS (ignored).
768	* @param hThreadSelf The thread.
769	* @param pvUser Pointer to a TeleporterStateSrc instance.
770	*/
771	/static/ DECLCALLBACK(int)
772	Console::i_teleporterSrcThreadWrapper(RTTHREAD hThreadSelf, void *pvUser)
773	{
774	RT_NOREF(hThreadSelf);
775	TeleporterStateSrc pState = (TeleporterStateSrc )pvUser;
776
777	/*
778	* Console::teleporterSrc does the work, we just grab onto the VM handle
779	* and do the cleanups afterwards.
780	*/
781	SafeVMPtr ptrVM(pState->mptrConsole);
782	HRESULT hrc = ptrVM.rc();
783
784	if (SUCCEEDED(hrc))
785	hrc = pState->mptrConsole->i_teleporterSrc(pState);
786
787	/* Close the connection ASAP on so that the other side can complete. */
788	if (pState->mhSocket != NIL_RTSOCKET)
789	{
790	RTTcpClientClose(pState->mhSocket);
791	pState->mhSocket = NIL_RTSOCKET;
792	}
793
794	/* Aaarg! setMachineState trashes error info on Windows, so we have to
795	complete things here on failure instead of right before cleanup. */
796	if (FAILED(hrc))
797	pState->mptrProgress->i_notifyComplete(hrc);
798
799	/* We can no longer be canceled (success), or it doesn't matter any longer (failure). */
800	pState->mptrProgress->i_setCancelCallback(NULL, NULL);
801
802	/*
803	* Write lock the console before resetting mptrCancelableProgress and
804	* fixing the state.
805	*/
806	AutoWriteLock autoLock(pState->mptrConsole COMMA_LOCKVAL_SRC_POS);
807	pState->mptrConsole->mptrCancelableProgress.setNull();
808
809	VMSTATE const enmVMState = pState->mpVMM->pfnVMR3GetStateU(pState->mpUVM);
810	MachineState_T const enmMachineState = pState->mptrConsole->mMachineState;
811	if (SUCCEEDED(hrc))
812	{
813	/*
814	* Automatically shut down the VM on success.
815	*
816	* Note! We have to release the VM caller object or we'll deadlock in
817	* powerDown.
818	*/
819	AssertLogRelMsg(enmVMState == VMSTATE_SUSPENDED, ("%s\n", pState->mpVMM->pfnVMR3GetStateName(enmVMState)));
820	AssertLogRelMsg(enmMachineState == MachineState_TeleportingPausedVM, ("%s\n", ::stringifyMachineState(enmMachineState)));
821
822	ptrVM.release();
823
824	pState->mptrConsole->mVMIsAlreadyPoweringOff = true; /* (Make sure we stick in the TeleportingPausedVM state.) */
825	autoLock.release();
826
827	hrc = pState->mptrConsole->i_powerDown();
828
829	autoLock.acquire();
830	pState->mptrConsole->mVMIsAlreadyPoweringOff = false;
831
832	pState->mptrProgress->i_notifyComplete(hrc);
833	}
834	else
835	{
836	/*
837	* Work the state machinery on failure.
838	*
839	* If the state is no longer 'Teleporting*', some other operation has
840	* canceled us and there is nothing we need to do here. In all other
841	* cases, we've failed one way or another.
842	*/
843	if ( enmMachineState == MachineState_Teleporting
844	\|\| enmMachineState == MachineState_TeleportingPausedVM
845	)
846	{
847	if (pState->mfUnlockedMedia)
848	{
849	ErrorInfoKeeper Oak;
850	HRESULT hrc2 = pState->mptrConsole->mControl->LockMedia();
851	if (FAILED(hrc2))
852	{
853	uint64_t StartMS = RTTimeMilliTS();
854	do
855	{
856	RTThreadSleep(2);
857	hrc2 = pState->mptrConsole->mControl->LockMedia();
858	} while ( FAILED(hrc2)
859	&& RTTimeMilliTS() - StartMS < 2000);
860	}
861	if (SUCCEEDED(hrc2))
862	pState->mfUnlockedMedia = true;
863	else
864	LogRel(("FATAL ERROR: Failed to re-take the media locks. hrc2=%Rhrc\n", hrc2));
865	}
866
867	switch (enmVMState)
868	{
869	case VMSTATE_RUNNING:
870	case VMSTATE_RUNNING_LS:
871	case VMSTATE_DEBUGGING:
872	case VMSTATE_DEBUGGING_LS:
873	case VMSTATE_POWERING_OFF:
874	case VMSTATE_POWERING_OFF_LS:
875	case VMSTATE_RESETTING:
876	case VMSTATE_RESETTING_LS:
877	case VMSTATE_SOFT_RESETTING:
878	case VMSTATE_SOFT_RESETTING_LS:
879	Assert(!pState->mfSuspendedByUs);
880	Assert(!pState->mfUnlockedMedia);
881	pState->mptrConsole->i_setMachineState(MachineState_Running);
882	break;
883
884	case VMSTATE_GURU_MEDITATION:
885	case VMSTATE_GURU_MEDITATION_LS:
886	pState->mptrConsole->i_setMachineState(MachineState_Stuck);
887	break;
888
889	case VMSTATE_FATAL_ERROR:
890	case VMSTATE_FATAL_ERROR_LS:
891	pState->mptrConsole->i_setMachineState(MachineState_Paused);
892	break;
893
894	default:
895	AssertMsgFailed(("%s\n", pState->mpVMM->pfnVMR3GetStateName(enmVMState)));
896	RT_FALL_THRU();
897	case VMSTATE_SUSPENDED:
898	case VMSTATE_SUSPENDED_LS:
899	case VMSTATE_SUSPENDING:
900	case VMSTATE_SUSPENDING_LS:
901	case VMSTATE_SUSPENDING_EXT_LS:
902	if (!pState->mfUnlockedMedia)
903	{
904	pState->mptrConsole->i_setMachineState(MachineState_Paused);
905	if (pState->mfSuspendedByUs)
906	{
907	autoLock.release();
908	int vrc = pState->mpVMM->pfnVMR3Resume(pState->mpUVM, VMRESUMEREASON_TELEPORT_FAILED);
909	AssertLogRelMsgRC(vrc, ("VMR3Resume -> %Rrc\n", vrc));
910	autoLock.acquire();
911	}
912	}
913	else
914	{
915	/* Faking a guru meditation is the best I can think of doing here... */
916	pState->mptrConsole->i_setMachineState(MachineState_Stuck);
917	}
918	break;
919	}
920	}
921	}
922	autoLock.release();
923
924	/*
925	* Cleanup.
926	*/
927	Assert(pState->mhSocket == NIL_RTSOCKET);
928	delete pState;
929
930	return VINF_SUCCESS; /* ignored */
931	}
932
933
934	/**
935	* Start teleporter to the specified target.
936	*
937	* @returns COM status code.
938	*
939	* @param aHostname The name of the target host.
940	* @param aTcpport The TCP port number.
941	* @param aPassword The password.
942	* @param aMaxDowntime Max allowed "downtime" in milliseconds.
943	* @param aProgress Where to return the progress object.
944	*/
945	HRESULT Console::teleport(const com::Utf8Str &aHostname, ULONG aTcpport, const com::Utf8Str &aPassword,
946	ULONG aMaxDowntime, ComPtr<IProgress> &aProgress)
947	{
948	/*
949	* Validate parameters, check+hold object status, write lock the object
950	* and validate the state.
951	*/
952	Utf8Str strPassword(aPassword);
953	if (!strPassword.isEmpty())
954	{
955	if (VBoxIsPasswordHashed(&strPassword))
956	return setError(E_INVALIDARG, tr("The specified password resembles a hashed password, expected plain text"));
957	VBoxHashPassword(&strPassword);
958	}
959
960	AutoCaller autoCaller(this);
961	if (FAILED(autoCaller.rc())) return autoCaller.rc();
962
963	AutoWriteLock autoLock(this COMMA_LOCKVAL_SRC_POS);
964	LogFlowThisFunc(("mMachineState=%d\n", mMachineState));
965
966	switch (mMachineState)
967	{
968	case MachineState_Running:
969	case MachineState_Paused:
970	break;
971
972	default:
973	return setError(VBOX_E_INVALID_VM_STATE, tr("Invalid machine state: %s (must be Running or Paused)"),
974	Global::stringifyMachineState(mMachineState));
975	}
976
977
978	/*
979	* Create a progress object, spawn a worker thread and change the state.
980	* Note! The thread won't start working until we release the lock.
981	*/
982	LogFlowThisFunc(("Initiating TELEPORT request...\n"));
983
984	ComObjPtr<Progress> ptrProgress;
985	HRESULT hrc = ptrProgress.createObject();
986	if (SUCCEEDED(hrc))
987	hrc = ptrProgress->init(static_cast<IConsole *>(this),
988	Bstr(tr("Teleporter")).raw(),
989	TRUE /aCancelable/);
990	if (FAILED(hrc))
991	return hrc;
992
993	TeleporterStateSrc *pState = new TeleporterStateSrc(this, mpUVM, mpVMM, ptrProgress, mMachineState);
994	pState->mstrPassword = strPassword;
995	pState->mstrHostname = aHostname;
996	pState->muPort = aTcpport;
997	pState->mcMsMaxDowntime = aMaxDowntime;
998
999	void pvUser = static_cast<void >(static_cast<TeleporterState *>(pState));
1000	ptrProgress->i_setCancelCallback(teleporterProgressCancelCallback, pvUser);
1001
1002	int vrc = RTThreadCreate(NULL, Console::i_teleporterSrcThreadWrapper, (void )pState, 0 /cbStack*/,
1003	RTTHREADTYPE_EMULATION, 0 /fFlags/, "Teleport");
1004	if (RT_SUCCESS(vrc))
1005	{
1006	if (mMachineState == MachineState_Running)
1007	hrc = i_setMachineState(MachineState_Teleporting);
1008	else
1009	hrc = i_setMachineState(MachineState_TeleportingPausedVM);
1010	if (SUCCEEDED(hrc))
1011	{
1012	ptrProgress.queryInterfaceTo(aProgress.asOutParam());
1013	mptrCancelableProgress = aProgress;
1014	}
1015	else
1016	ptrProgress->Cancel();
1017	}
1018	else
1019	{
1020	ptrProgress->i_setCancelCallback(NULL, NULL);
1021	delete pState;
1022	hrc = setErrorBoth(E_FAIL, vrc, "RTThreadCreate -> %Rrc", vrc);
1023	}
1024
1025	return hrc;
1026	}
1027
1028
1029	/**
1030	* Creates a TCP server that listens for the source machine and passes control
1031	* over to Console::teleporterTrgServeConnection().
1032	*
1033	* @returns VBox status code.
1034	* @param pUVM The user-mode VM handle
1035	* @param pVMM The VMM vtable.
1036	* @param pMachine The IMachine for the virtual machine.
1037	* @param pErrorMsg Pointer to the error string for VMSetError.
1038	* @param fStartPaused Whether to start it in the Paused (true) or
1039	* Running (false) state,
1040	* @param pProgress Pointer to the progress object.
1041	* @param pfPowerOffOnFailure Whether the caller should power off
1042	* the VM on failure.
1043	*
1044	* @remarks The caller expects error information to be set on failure.
1045	* @todo Check that all the possible failure paths sets error info...
1046	*/
1047	HRESULT Console::i_teleporterTrg(PUVM pUVM, PCVMMR3VTABLE pVMM, IMachine pMachine, Utf8Str pErrorMsg, bool fStartPaused,
1048	Progress pProgress, bool pfPowerOffOnFailure)
1049	{
1050	LogThisFunc(("pUVM=%p pVMM=%p pMachine=%p fStartPaused=%RTbool pProgress=%p\n", pUVM, pVMM, pMachine, fStartPaused, pProgress));
1051
1052	*pfPowerOffOnFailure = true;
1053
1054	/*
1055	* Get the config.
1056	*/
1057	ULONG uPort;
1058	HRESULT hrc = pMachine->COMGETTER(TeleporterPort)(&uPort);
1059	if (FAILED(hrc))
1060	return hrc;
1061	ULONG const uPortOrg = uPort;
1062
1063	Bstr bstrAddress;
1064	hrc = pMachine->COMGETTER(TeleporterAddress)(bstrAddress.asOutParam());
1065	if (FAILED(hrc))
1066	return hrc;
1067	Utf8Str strAddress(bstrAddress);
1068	const char *pszAddress = strAddress.isEmpty() ? NULL : strAddress.c_str();
1069
1070	Bstr bstrPassword;
1071	hrc = pMachine->COMGETTER(TeleporterPassword)(bstrPassword.asOutParam());
1072	if (FAILED(hrc))
1073	return hrc;
1074	Utf8Str strPassword(bstrPassword);
1075	strPassword.append('\n'); /* To simplify password checking. */
1076
1077	/*
1078	* Create the TCP server.
1079	*/
1080	int vrc = VINF_SUCCESS; /* Shut up MSC */
1081	PRTTCPSERVER hServer = NULL; /* ditto */
1082	if (uPort)
1083	vrc = RTTcpServerCreateEx(pszAddress, uPort, &hServer);
1084	else
1085	{
1086	for (int cTries = 10240; cTries > 0; cTries--)
1087	{
1088	uPort = RTRandU32Ex(cTries >= 8192 ? 49152 : 1024, 65534);
1089	vrc = RTTcpServerCreateEx(pszAddress, uPort, &hServer);
1090	if (vrc != VERR_NET_ADDRESS_IN_USE)
1091	break;
1092	}
1093	if (RT_SUCCESS(vrc))
1094	{
1095	hrc = pMachine->COMSETTER(TeleporterPort)(uPort);
1096	if (FAILED(hrc))
1097	{
1098	RTTcpServerDestroy(hServer);
1099	return hrc;
1100	}
1101	}
1102	}
1103	if (RT_FAILURE(vrc))
1104	return setErrorBoth(E_FAIL, vrc, tr("RTTcpServerCreateEx failed with status %Rrc"), vrc);
1105
1106	/*
1107	* Create a one-shot timer for timing out after 5 mins.
1108	*/
1109	RTTIMERLR hTimerLR;
1110	vrc = RTTimerLRCreateEx(&hTimerLR, 0 /ns/, RTTIMER_FLAGS_CPU_ANY, teleporterDstTimeout, hServer);
1111	if (RT_SUCCESS(vrc))
1112	{
1113	vrc = RTTimerLRStart(hTimerLR, 560UINT64_C(1000000000) /ns/);
1114	if (RT_SUCCESS(vrc))
1115	{
1116	/*
1117	* Do the job, when it returns we're done.
1118	*/
1119	TeleporterStateTrg theState(this, pUVM, pVMM, pProgress, pMachine, mControl, &hTimerLR, fStartPaused);
1120	theState.mstrPassword = strPassword;
1121	theState.mhServer = hServer;
1122
1123	void pvUser = static_cast<void >(static_cast<TeleporterState *>(&theState));
1124	if (pProgress->i_setCancelCallback(teleporterProgressCancelCallback, pvUser))
1125	{
1126	LogRel(("Teleporter: Waiting for incoming VM...\n"));
1127	hrc = pProgress->SetNextOperation(Bstr(tr("Waiting for incoming VM")).raw(), 1);
1128	if (SUCCEEDED(hrc))
1129	{
1130	vrc = RTTcpServerListen(hServer, Console::i_teleporterTrgServeConnection, &theState);
1131	pProgress->i_setCancelCallback(NULL, NULL);
1132
1133	if (vrc == VERR_TCP_SERVER_STOP)
1134	{
1135	vrc = theState.mRc;
1136	/* Power off the VM on failure unless the state callback
1137	already did that. */
1138	*pfPowerOffOnFailure = false;
1139	if (RT_SUCCESS(vrc))
1140	hrc = S_OK;
1141	else
1142	{
1143	VMSTATE enmVMState = pVMM->pfnVMR3GetStateU(pUVM);
1144	if ( enmVMState != VMSTATE_OFF
1145	&& enmVMState != VMSTATE_POWERING_OFF)
1146	*pfPowerOffOnFailure = true;
1147
1148	/* Set error. */
1149	if (pErrorMsg->length())
1150	hrc = setError(E_FAIL, "%s", pErrorMsg->c_str());
1151	else
1152	hrc = setError(E_FAIL, tr("Teleporation failed (%Rrc)"), vrc);
1153	}
1154	}
1155	else if (vrc == VERR_TCP_SERVER_SHUTDOWN)
1156	{
1157	BOOL fCanceled = TRUE;
1158	hrc = pProgress->COMGETTER(Canceled)(&fCanceled);
1159	if (FAILED(hrc) \|\| fCanceled)
1160	hrc = setError(E_FAIL, tr("Teleporting canceled"));
1161	else
1162	hrc = setError(E_FAIL, tr("Teleporter timed out waiting for incoming connection"));
1163	LogRel(("Teleporter: RTTcpServerListen aborted - %Rrc\n", vrc));
1164	}
1165	else
1166	{
1167	hrc = setErrorBoth(E_FAIL, vrc, tr("Unexpected RTTcpServerListen status code %Rrc"), vrc);
1168	LogRel(("Teleporter: Unexpected RTTcpServerListen rc: %Rrc\n", vrc));
1169	}
1170	}
1171	else
1172	LogThisFunc(("SetNextOperation failed, %Rhrc\n", hrc));
1173	}
1174	else
1175	{
1176	LogThisFunc(("Canceled - check point #1\n"));
1177	hrc = setError(E_FAIL, tr("Teleporting canceled"));
1178	}
1179	}
1180	else
1181	hrc = setErrorBoth(E_FAIL, vrc, "RTTimerLRStart -> %Rrc", vrc);
1182
1183	RTTimerLRDestroy(hTimerLR);
1184	}
1185	else
1186	hrc = setErrorBoth(E_FAIL, vrc, "RTTimerLRCreate -> %Rrc", vrc);
1187	RTTcpServerDestroy(hServer);
1188
1189	/*
1190	* If we change TeleporterPort above, set it back to it's original
1191	* value before returning.
1192	*/
1193	if (uPortOrg != uPort)
1194	{
1195	ErrorInfoKeeper Eik;
1196	pMachine->COMSETTER(TeleporterPort)(uPortOrg);
1197	}
1198
1199	return hrc;
1200	}
1201
1202
1203	/**
1204	* Unlock the media.
1205	*
1206	* This is used in error paths.
1207	*
1208	* @param pState The teleporter state.
1209	*/
1210	static void teleporterTrgUnlockMedia(TeleporterStateTrg *pState)
1211	{
1212	if (pState->mfLockedMedia)
1213	{
1214	pState->mpControl->UnlockMedia();
1215	pState->mfLockedMedia = false;
1216	}
1217	}
1218
1219
1220	static int teleporterTcpWriteACK(TeleporterStateTrg *pState, bool fAutomaticUnlock = true)
1221	{
1222	int vrc = RTTcpWrite(pState->mhSocket, "ACK\n", sizeof("ACK\n") - 1);
1223	if (RT_FAILURE(vrc))
1224	{
1225	LogRel(("Teleporter: RTTcpWrite(,ACK,) -> %Rrc\n", vrc));
1226	if (fAutomaticUnlock)
1227	teleporterTrgUnlockMedia(pState);
1228	}
1229	return vrc;
1230	}
1231
1232
1233	static int teleporterTcpWriteNACK(TeleporterStateTrg pState, int32_t rc2, const char pszMsgText = NULL)
1234	{
1235	/*
1236	* Unlock media sending the NACK. That way the other doesn't have to spin
1237	* waiting to regain the locks.
1238	*/
1239	teleporterTrgUnlockMedia(pState);
1240
1241	char szMsg[256];
1242	size_t cch;
1243	if (pszMsgText && *pszMsgText)
1244	{
1245	cch = RTStrPrintf(szMsg, sizeof(szMsg), "NACK=%d;%s\n", rc2, pszMsgText);
1246	for (size_t off = 6; off + 1 < cch; off++)
1247	if (szMsg[off] == '\n')
1248	szMsg[off] = '\r';
1249	}
1250	else
1251	cch = RTStrPrintf(szMsg, sizeof(szMsg), "NACK=%d\n", rc2);
1252	int vrc = RTTcpWrite(pState->mhSocket, szMsg, cch);
1253	if (RT_FAILURE(vrc))
1254	LogRel(("Teleporter: RTTcpWrite(,%s,%zu) -> %Rrc\n", szMsg, cch, vrc));
1255	return vrc;
1256	}
1257
1258
1259	/**
1260	* @copydoc FNRTTCPSERVE
1261	*
1262	* @returns VINF_SUCCESS or VERR_TCP_SERVER_STOP.
1263	*/
1264	/static/ DECLCALLBACK(int)
1265	Console::i_teleporterTrgServeConnection(RTSOCKET hSocket, void *pvUser)
1266	{
1267	TeleporterStateTrg pState = (TeleporterStateTrg )pvUser;
1268	pState->mhSocket = hSocket;
1269
1270	/*
1271	* Disable Nagle and say hello.
1272	*/
1273	int vrc = RTTcpSetSendCoalescing(pState->mhSocket, false /fEnable/);
1274	AssertRC(vrc);
1275	vrc = RTTcpWrite(hSocket, g_szWelcome, sizeof(g_szWelcome) - 1);
1276	if (RT_FAILURE(vrc))
1277	{
1278	LogRel(("Teleporter: Failed to write welcome message: %Rrc\n", vrc));
1279	return VINF_SUCCESS;
1280	}
1281
1282	/*
1283	* Password (includes '\n', see teleporterTrg).
1284	*/
1285	const char *pszPassword = pState->mstrPassword.c_str();
1286	unsigned off = 0;
1287	while (pszPassword[off])
1288	{
1289	char ch;
1290	vrc = RTTcpRead(hSocket, &ch, sizeof(ch), NULL);
1291	if ( RT_FAILURE(vrc)
1292	\|\| pszPassword[off] != ch)
1293	{
1294	if (RT_FAILURE(vrc))
1295	LogRel(("Teleporter: Password read failure (off=%u): %Rrc\n", off, vrc));
1296	else
1297	LogRel(("Teleporter: Invalid password (off=%u)\n", off));
1298	teleporterTcpWriteNACK(pState, VERR_AUTHENTICATION_FAILURE);
1299	return VINF_SUCCESS;
1300	}
1301	off++;
1302	}
1303	vrc = teleporterTcpWriteACK(pState);
1304	if (RT_FAILURE(vrc))
1305	return VINF_SUCCESS;
1306
1307	/*
1308	* Update the progress bar, with peer name if available.
1309	*/
1310	HRESULT hrc;
1311	RTNETADDR Addr;
1312	vrc = RTTcpGetPeerAddress(hSocket, &Addr);
1313	if (RT_SUCCESS(vrc))
1314	{
1315	LogRel(("Teleporter: Incoming VM from %RTnaddr!\n", &Addr));
1316	hrc = pState->mptrProgress->SetNextOperation(BstrFmt(tr("Teleporting VM from %RTnaddr"), &Addr).raw(), 8);
1317	}
1318	else
1319	{
1320	LogRel(("Teleporter: Incoming VM!\n"));
1321	hrc = pState->mptrProgress->SetNextOperation(Bstr(tr("Teleporting VM")).raw(), 8);
1322	}
1323	AssertMsg(SUCCEEDED(hrc) \|\| hrc == E_FAIL, ("%Rhrc\n", hrc));
1324
1325	/*
1326	* Stop the server and cancel the timeout timer.
1327	*
1328	* Note! After this point we must return VERR_TCP_SERVER_STOP, while prior
1329	* to it we must not return that value!
1330	*/
1331	RTTcpServerShutdown(pState->mhServer);
1332	RTTimerLRDestroy(*pState->mphTimerLR);
1333	*pState->mphTimerLR = NIL_RTTIMERLR;
1334
1335	/*
1336	* Command processing loop.
1337	*/
1338	bool fDone = false;
1339	for (;;)
1340	{
1341	char szCmd[128];
1342	vrc = teleporterTcpReadLine(pState, szCmd, sizeof(szCmd));
1343	if (RT_FAILURE(vrc))
1344	break;
1345
1346	if (!strcmp(szCmd, "load"))
1347	{
1348	vrc = teleporterTcpWriteACK(pState);
1349	if (RT_FAILURE(vrc))
1350	break;
1351
1352	int vrc2 = pState->mpVMM->pfnVMR3AtErrorRegister(pState->mpUVM, Console::i_genericVMSetErrorCallback,
1353	&pState->mErrorText);
1354	AssertRC(vrc2);
1355	RTSocketRetain(pState->mhSocket); /* For concurrent access by I/O thread and EMT. */
1356	pState->moffStream = 0;
1357
1358	void pvUser2 = static_cast<void >(static_cast<TeleporterState *>(pState));
1359	vrc = pState->mpVMM->pfnVMR3LoadFromStream(pState->mpUVM,
1360	&g_teleporterTcpOps, pvUser2,
1361	teleporterProgressCallback, pvUser2);
1362
1363	RTSocketRelease(pState->mhSocket);
1364	vrc2 = pState->mpVMM->pfnVMR3AtErrorDeregister(pState->mpUVM, Console::i_genericVMSetErrorCallback, &pState->mErrorText);
1365	AssertRC(vrc2);
1366
1367	if (RT_FAILURE(vrc))
1368	{
1369	LogRel(("Teleporter: VMR3LoadFromStream -> %Rrc\n", vrc));
1370	teleporterTcpWriteNACK(pState, vrc, pState->mErrorText.c_str());
1371	break;
1372	}
1373
1374	/* The EOS might not have been read, make sure it is. */
1375	pState->mfStopReading = false;
1376	size_t cbRead;
1377	vrc = teleporterTcpOpRead(pvUser2, pState->moffStream, szCmd, 1, &cbRead);
1378	if (vrc != VERR_EOF)
1379	{
1380	LogRel(("Teleporter: Draining teleporterTcpOpRead -> %Rrc\n", vrc));
1381	teleporterTcpWriteNACK(pState, vrc);
1382	break;
1383	}
1384
1385	vrc = teleporterTcpWriteACK(pState);
1386	}
1387	else if (!strcmp(szCmd, "cancel"))
1388	{
1389	/* Don't ACK this. */
1390	LogRel(("Teleporter: Received cancel command.\n"));
1391	vrc = VERR_SSM_CANCELLED;
1392	}
1393	else if (!strcmp(szCmd, "lock-media"))
1394	{
1395	hrc = pState->mpControl->LockMedia();
1396	if (SUCCEEDED(hrc))
1397	{
1398	pState->mfLockedMedia = true;
1399	vrc = teleporterTcpWriteACK(pState);
1400	}
1401	else
1402	{
1403	vrc = VERR_FILE_LOCK_FAILED;
1404	teleporterTcpWriteNACK(pState, vrc);
1405	}
1406	}
1407	else if ( !strcmp(szCmd, "hand-over-resume")
1408	\|\| !strcmp(szCmd, "hand-over-paused"))
1409	{
1410	/*
1411	* Point of no return.
1412	*
1413	* Note! Since we cannot tell whether a VMR3Resume failure is
1414	* destructive for the source or not, we have little choice
1415	* but to ACK it first and take any failures locally.
1416	*
1417	* Ideally, we should try resume it first and then ACK (or
1418	* NACK) the request since this would reduce latency and
1419	* make it possible to recover from some VMR3Resume failures.
1420	*/
1421	if ( SUCCEEDED(pState->mptrProgress->NotifyPointOfNoReturn())
1422	&& pState->mfLockedMedia)
1423	{
1424	vrc = teleporterTcpWriteACK(pState);
1425	if (RT_SUCCESS(vrc))
1426	{
1427	if (!strcmp(szCmd, "hand-over-resume"))
1428	vrc = pState->mpVMM->pfnVMR3Resume(pState->mpUVM, VMRESUMEREASON_TELEPORTED);
1429	else
1430	pState->mptrConsole->i_setMachineState(MachineState_Paused);
1431	fDone = true;
1432	break;
1433	}
1434	}
1435	else
1436	{
1437	vrc = pState->mfLockedMedia ? VERR_WRONG_ORDER : VERR_SSM_CANCELLED;
1438	teleporterTcpWriteNACK(pState, vrc);
1439	}
1440	}
1441	else
1442	{
1443	LogRel(("Teleporter: Unknown command '%s' (%.*Rhxs)\n", szCmd, strlen(szCmd), szCmd));
1444	vrc = VERR_NOT_IMPLEMENTED;
1445	teleporterTcpWriteNACK(pState, vrc);
1446	}
1447
1448	if (RT_FAILURE(vrc))
1449	break;
1450	}
1451
1452	if (RT_SUCCESS(vrc) && !fDone)
1453	vrc = VERR_WRONG_ORDER;
1454	if (RT_FAILURE(vrc))
1455	teleporterTrgUnlockMedia(pState);
1456
1457	pState->mRc = vrc;
1458	pState->mhSocket = NIL_RTSOCKET;
1459	LogFlowFunc(("returns mRc=%Rrc\n", vrc));
1460	return VERR_TCP_SERVER_STOP;
1461	}
1462

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source: vbox/trunk/src/VBox/Main/src-client/ConsoleImplTeleporter.cpp@ 96284

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