GuestCtrlPrivate.cpp@ 79133

Last change on this file since 79133 was 78738, checked in by vboxsync, 6 years ago
Main: Fixed buggy count wraparound handling in GuestBase::generateContextID. bugref:9320
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
File size: 48.1 KB

Line
1	/* $Id: GuestCtrlPrivate.cpp 78738 2019-05-24 23:57:42Z vboxsync $ */
2	/** @file
3	* Internal helpers/structures for guest control functionality.
4	*/
5
6	/*
7	* Copyright (C) 2011-2019 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_GUEST_CONTROL
23	#include "LoggingNew.h"
24
25	#ifndef VBOX_WITH_GUEST_CONTROL
26	# error "VBOX_WITH_GUEST_CONTROL must defined in this file"
27	#endif
28	#include "GuestCtrlImplPrivate.h"
29	#include "GuestSessionImpl.h"
30	#include "VMMDev.h"
31
32	#include <iprt/asm.h>
33	#include <iprt/cpp/utils.h> /* For unconst(). */
34	#include <iprt/ctype.h>
35	#ifdef DEBUG
36	# include <iprt/file.h>
37	#endif
38	#include <iprt/fs.h>
39	#include <iprt/rand.h>
40	#include <iprt/time.h>
41	#include <VBox/AssertGuest.h>
42
43
44	/**
45	* Extracts the timespec from a given stream block key.
46	*
47	* @return Pointer to handed-in timespec, or NULL if invalid / not found.
48	* @param strmBlk Stream block to extract timespec from.
49	* @param strKey Key to get timespec for.
50	* @param pTimeSpec Where to store the extracted timespec.
51	*/
52	/* static */
53	PRTTIMESPEC GuestFsObjData::TimeSpecFromKey(const GuestProcessStreamBlock &strmBlk, const Utf8Str &strKey, PRTTIMESPEC pTimeSpec)
54	{
55	AssertPtrReturn(pTimeSpec, NULL);
56
57	Utf8Str strTime = strmBlk.GetString(strKey.c_str());
58	if (strTime.isEmpty())
59	return NULL;
60
61	if (!RTTimeSpecFromString(pTimeSpec, strTime.c_str()))
62	return NULL;
63
64	return pTimeSpec;
65	}
66
67	/**
68	* Extracts the nanoseconds relative from Unix epoch for a given stream block key.
69	*
70	* @return Nanoseconds relative from Unix epoch, or 0 if invalid / not found.
71	* @param strmBlk Stream block to extract nanoseconds from.
72	* @param strKey Key to get nanoseconds for.
73	*/
74	/* static */
75	int64_t GuestFsObjData::UnixEpochNsFromKey(const GuestProcessStreamBlock &strmBlk, const Utf8Str &strKey)
76	{
77	RTTIMESPEC TimeSpec;
78	if (!GuestFsObjData::TimeSpecFromKey(strmBlk, strKey, &TimeSpec))
79	return 0;
80
81	return TimeSpec.i64NanosecondsRelativeToUnixEpoch;
82	}
83
84	/**
85	* Initializes this object data with a stream block from VBOXSERVICE_TOOL_LS.
86	*
87	* This is also used by FromStat since the output should be identical given that
88	* they use the same output function on the guest side when fLong is true.
89	*
90	* @return VBox status code.
91	* @param strmBlk Stream block to use for initialization.
92	* @param fLong Whether the stream block contains long (detailed) information or not.
93	*/
94	int GuestFsObjData::FromLs(const GuestProcessStreamBlock &strmBlk, bool fLong)
95	{
96	LogFlowFunc(("\n"));
97	#ifdef DEBUG
98	strmBlk.DumpToLog();
99	#endif
100
101	/* Object name. */
102	mName = strmBlk.GetString("name");
103	ASSERT_GUEST_RETURN(mName.isNotEmpty(), VERR_NOT_FOUND);
104
105	/* Type & attributes. */
106	bool fHaveAttribs = false;
107	char szAttribs[32];
108	memset(szAttribs, '?', sizeof(szAttribs) - 1);
109	mType = FsObjType_Unknown;
110	const char *psz = strmBlk.GetString("ftype");
111	if (psz)
112	{
113	fHaveAttribs = true;
114	szAttribs[0] = *psz;
115	switch (*psz)
116	{
117	case '-': mType = FsObjType_File; break;
118	case 'd': mType = FsObjType_Directory; break;
119	case 'l': mType = FsObjType_Symlink; break;
120	case 'c': mType = FsObjType_DevChar; break;
121	case 'b': mType = FsObjType_DevBlock; break;
122	case 'f': mType = FsObjType_Fifo; break;
123	case 's': mType = FsObjType_Socket; break;
124	case 'w': mType = FsObjType_WhiteOut; break;
125	default:
126	AssertMsgFailed(("%s\n", psz));
127	szAttribs[0] = '?';
128	fHaveAttribs = false;
129	break;
130	}
131	}
132	psz = strmBlk.GetString("owner_mask");
133	if ( psz
134	&& (psz[0] == '-' \|\| psz[0] == 'r')
135	&& (psz[1] == '-' \|\| psz[1] == 'w')
136	&& (psz[2] == '-' \|\| psz[2] == 'x'))
137	{
138	szAttribs[1] = psz[0];
139	szAttribs[2] = psz[1];
140	szAttribs[3] = psz[2];
141	fHaveAttribs = true;
142	}
143	psz = strmBlk.GetString("group_mask");
144	if ( psz
145	&& (psz[0] == '-' \|\| psz[0] == 'r')
146	&& (psz[1] == '-' \|\| psz[1] == 'w')
147	&& (psz[2] == '-' \|\| psz[2] == 'x'))
148	{
149	szAttribs[4] = psz[0];
150	szAttribs[5] = psz[1];
151	szAttribs[6] = psz[2];
152	fHaveAttribs = true;
153	}
154	psz = strmBlk.GetString("other_mask");
155	if ( psz
156	&& (psz[0] == '-' \|\| psz[0] == 'r')
157	&& (psz[1] == '-' \|\| psz[1] == 'w')
158	&& (psz[2] == '-' \|\| psz[2] == 'x'))
159	{
160	szAttribs[7] = psz[0];
161	szAttribs[8] = psz[1];
162	szAttribs[9] = psz[2];
163	fHaveAttribs = true;
164	}
165	szAttribs[10] = ' '; /* Reserve three chars for sticky bits. */
166	szAttribs[11] = ' ';
167	szAttribs[12] = ' ';
168	szAttribs[13] = ' '; /* Separator. */
169	psz = strmBlk.GetString("dos_mask");
170	if ( psz
171	&& (psz[ 0] == '-' \|\| psz[ 0] == 'R')
172	&& (psz[ 1] == '-' \|\| psz[ 1] == 'H')
173	&& (psz[ 2] == '-' \|\| psz[ 2] == 'S')
174	&& (psz[ 3] == '-' \|\| psz[ 3] == 'D')
175	&& (psz[ 4] == '-' \|\| psz[ 4] == 'A')
176	&& (psz[ 5] == '-' \|\| psz[ 5] == 'd')
177	&& (psz[ 6] == '-' \|\| psz[ 6] == 'N')
178	&& (psz[ 7] == '-' \|\| psz[ 7] == 'T')
179	&& (psz[ 8] == '-' \|\| psz[ 8] == 'P')
180	&& (psz[ 9] == '-' \|\| psz[ 9] == 'J')
181	&& (psz[10] == '-' \|\| psz[10] == 'C')
182	&& (psz[11] == '-' \|\| psz[11] == 'O')
183	&& (psz[12] == '-' \|\| psz[12] == 'I')
184	&& (psz[13] == '-' \|\| psz[13] == 'E'))
185	{
186	memcpy(&szAttribs[14], psz, 14);
187	fHaveAttribs = true;
188	}
189	szAttribs[28] = '\0';
190	if (fHaveAttribs)
191	mFileAttrs = szAttribs;
192
193	/* Object size. */
194	int rc = strmBlk.GetInt64Ex("st_size", &mObjectSize);
195	ASSERT_GUEST_RC_RETURN(rc, rc);
196	strmBlk.GetInt64Ex("alloc", &mAllocatedSize);
197
198	/* INode number and device. */
199	psz = strmBlk.GetString("node_id");
200	if (!psz)
201	psz = strmBlk.GetString("cnode_id"); /* copy & past error fixed in 6.0 RC1 */
202	if (psz)
203	mNodeID = RTStrToInt64(psz);
204	mNodeIDDevice = strmBlk.GetUInt32("inode_dev"); /* (Produced by GAs prior to 6.0 RC1.) */
205
206	if (fLong)
207	{
208	/* Dates. */
209	mAccessTime = GuestFsObjData::UnixEpochNsFromKey(strmBlk, "st_atime");
210	mBirthTime = GuestFsObjData::UnixEpochNsFromKey(strmBlk, "st_birthtime");
211	mChangeTime = GuestFsObjData::UnixEpochNsFromKey(strmBlk, "st_ctime");
212	mModificationTime = GuestFsObjData::UnixEpochNsFromKey(strmBlk, "st_mtime");
213
214	/* Owner & group. */
215	mUID = strmBlk.GetInt32("uid");
216	psz = strmBlk.GetString("username");
217	if (psz)
218	mUserName = psz;
219	mGID = strmBlk.GetInt32("gid");
220	psz = strmBlk.GetString("groupname");
221	if (psz)
222	mGroupName = psz;
223
224	/* Misc attributes: */
225	mNumHardLinks = strmBlk.GetUInt32("hlinks", 1);
226	mDeviceNumber = strmBlk.GetUInt32("st_rdev");
227	mGenerationID = strmBlk.GetUInt32("st_gen");
228	mUserFlags = strmBlk.GetUInt32("st_flags");
229
230	/** @todo ACL */
231	}
232
233	LogFlowFuncLeave();
234	return VINF_SUCCESS;
235	}
236
237	/**
238	* Parses stream block output data which came from the 'stat' (vbox_stat)
239	* VBoxService toolbox command. The result will be stored in this object.
240	*
241	* @returns VBox status code.
242	* @param strmBlk Stream block output data to parse.
243	*/
244	int GuestFsObjData::FromStat(const GuestProcessStreamBlock &strmBlk)
245	{
246	/* Should be identical output. */
247	return GuestFsObjData::FromLs(strmBlk, true /fLong/);
248	}
249
250	/**
251	* Parses stream block output data which came from the 'mktemp' (vbox_mktemp)
252	* VBoxService toolbox command. The result will be stored in this object.
253	*
254	* @returns VBox status code.
255	* @param strmBlk Stream block output data to parse.
256	*/
257	int GuestFsObjData::FromMkTemp(const GuestProcessStreamBlock &strmBlk)
258	{
259	LogFlowFunc(("\n"));
260
261	#ifdef DEBUG
262	strmBlk.DumpToLog();
263	#endif
264	/* Object name. */
265	mName = strmBlk.GetString("name");
266	ASSERT_GUEST_RETURN(mName.isNotEmpty(), VERR_NOT_FOUND);
267
268	/* Assign the stream block's rc. */
269	int rc = strmBlk.GetRc();
270
271	LogFlowFuncLeaveRC(rc);
272	return rc;
273	}
274
275	/**
276	* Returns the IPRT-compatible file mode.
277	* Note: Only handling RTFS_TYPE_ flags are implemented for now.
278	*
279	* @return IPRT file mode.
280	*/
281	RTFMODE GuestFsObjData::GetFileMode(void) const
282	{
283	RTFMODE fMode = 0;
284
285	switch (mType)
286	{
287	case FsObjType_Directory:
288	fMode \|= RTFS_TYPE_DIRECTORY;
289	break;
290
291	case FsObjType_File:
292	fMode \|= RTFS_TYPE_FILE;
293	break;
294
295	case FsObjType_Symlink:
296	fMode \|= RTFS_TYPE_SYMLINK;
297	break;
298
299	default:
300	break;
301	}
302
303	/** @todo Implement more stuff. */
304
305	return fMode;
306	}
307
308	///////////////////////////////////////////////////////////////////////////////
309
310	/** @todo NOT thread safe yet! */
311	/** @todo Add exception handling for STL stuff! */
312
313	GuestProcessStreamBlock::GuestProcessStreamBlock(void)
314	{
315
316	}
317
318	GuestProcessStreamBlock::~GuestProcessStreamBlock()
319	{
320	Clear();
321	}
322
323	/**
324	* Clears (destroys) the currently stored stream pairs.
325	*/
326	void GuestProcessStreamBlock::Clear(void)
327	{
328	mPairs.clear();
329	}
330
331	#ifdef DEBUG
332	/**
333	* Dumps the currently stored stream pairs to the (debug) log.
334	*/
335	void GuestProcessStreamBlock::DumpToLog(void) const
336	{
337	LogFlowFunc(("Dumping contents of stream block=0x%p (%ld items):\n",
338	this, mPairs.size()));
339
340	for (GuestCtrlStreamPairMapIterConst it = mPairs.begin();
341	it != mPairs.end(); ++it)
342	{
343	LogFlowFunc(("\t%s=%s\n", it->first.c_str(), it->second.mValue.c_str()));
344	}
345	}
346	#endif
347
348	/**
349	* Returns a 64-bit signed integer of a specified key.
350	*
351	* @return VBox status code. VERR_NOT_FOUND if key was not found.
352	* @param pszKey Name of key to get the value for.
353	* @param piVal Pointer to value to return.
354	*/
355	int GuestProcessStreamBlock::GetInt64Ex(const char pszKey, int64_t piVal) const
356	{
357	AssertPtrReturn(pszKey, VERR_INVALID_POINTER);
358	AssertPtrReturn(piVal, VERR_INVALID_POINTER);
359	const char *pszValue = GetString(pszKey);
360	if (pszValue)
361	{
362	*piVal = RTStrToInt64(pszValue);
363	return VINF_SUCCESS;
364	}
365	return VERR_NOT_FOUND;
366	}
367
368	/**
369	* Returns a 64-bit integer of a specified key.
370	*
371	* @return int64_t Value to return, 0 if not found / on failure.
372	* @param pszKey Name of key to get the value for.
373	*/
374	int64_t GuestProcessStreamBlock::GetInt64(const char *pszKey) const
375	{
376	int64_t iVal;
377	if (RT_SUCCESS(GetInt64Ex(pszKey, &iVal)))
378	return iVal;
379	return 0;
380	}
381
382	/**
383	* Returns the current number of stream pairs.
384	*
385	* @return uint32_t Current number of stream pairs.
386	*/
387	size_t GuestProcessStreamBlock::GetCount(void) const
388	{
389	return mPairs.size();
390	}
391
392	/**
393	* Gets the return code (name = "rc") of this stream block.
394	*
395	* @return VBox status code.
396	*/
397	int GuestProcessStreamBlock::GetRc(void) const
398	{
399	const char *pszValue = GetString("rc");
400	if (pszValue)
401	{
402	return RTStrToInt16(pszValue);
403	}
404	return VERR_NOT_FOUND;
405	}
406
407	/**
408	* Returns a string value of a specified key.
409	*
410	* @return uint32_t Pointer to string to return, NULL if not found / on failure.
411	* @param pszKey Name of key to get the value for.
412	*/
413	const char GuestProcessStreamBlock::GetString(const char pszKey) const
414	{
415	AssertPtrReturn(pszKey, NULL);
416
417	try
418	{
419	GuestCtrlStreamPairMapIterConst itPairs = mPairs.find(pszKey);
420	if (itPairs != mPairs.end())
421	return itPairs->second.mValue.c_str();
422	}
423	catch (const std::exception &ex)
424	{
425	RT_NOREF(ex);
426	}
427	return NULL;
428	}
429
430	/**
431	* Returns a 32-bit unsigned integer of a specified key.
432	*
433	* @return VBox status code. VERR_NOT_FOUND if key was not found.
434	* @param pszKey Name of key to get the value for.
435	* @param puVal Pointer to value to return.
436	*/
437	int GuestProcessStreamBlock::GetUInt32Ex(const char pszKey, uint32_t puVal) const
438	{
439	const char *pszValue = GetString(pszKey);
440	if (pszValue)
441	{
442	*puVal = RTStrToUInt32(pszValue);
443	return VINF_SUCCESS;
444	}
445	return VERR_NOT_FOUND;
446	}
447
448	/**
449	* Returns a 32-bit signed integer of a specified key.
450	*
451	* @returns 32-bit signed value
452	* @param pszKey Name of key to get the value for.
453	* @param iDefault The default to return on error if not found.
454	*/
455	int32_t GuestProcessStreamBlock::GetInt32(const char *pszKey, int32_t iDefault) const
456	{
457	const char *pszValue = GetString(pszKey);
458	if (pszValue)
459	{
460	int32_t iRet;
461	int rc = RTStrToInt32Full(pszValue, 0, &iRet);
462	if (RT_SUCCESS(rc))
463	return iRet;
464	ASSERT_GUEST_MSG_FAILED(("%s=%s\n", pszKey, pszValue));
465	}
466	return iDefault;
467	}
468
469	/**
470	* Returns a 32-bit unsigned integer of a specified key.
471	*
472	* @return uint32_t Value to return, 0 if not found / on failure.
473	* @param pszKey Name of key to get the value for.
474	* @param uDefault The default value to return.
475	*/
476	uint32_t GuestProcessStreamBlock::GetUInt32(const char pszKey, uint32_t uDefault /= 0*/) const
477	{
478	uint32_t uVal;
479	if (RT_SUCCESS(GetUInt32Ex(pszKey, &uVal)))
480	return uVal;
481	return uDefault;
482	}
483
484	/**
485	* Sets a value to a key or deletes a key by setting a NULL value.
486	*
487	* @return VBox status code.
488	* @param pszKey Key name to process.
489	* @param pszValue Value to set. Set NULL for deleting the key.
490	*/
491	int GuestProcessStreamBlock::SetValue(const char pszKey, const char pszValue)
492	{
493	AssertPtrReturn(pszKey, VERR_INVALID_POINTER);
494
495	int rc = VINF_SUCCESS;
496	try
497	{
498	Utf8Str Utf8Key(pszKey);
499
500	/* Take a shortcut and prevent crashes on some funny versions
501	* of STL if map is empty initially. */
502	if (!mPairs.empty())
503	{
504	GuestCtrlStreamPairMapIter it = mPairs.find(Utf8Key);
505	if (it != mPairs.end())
506	mPairs.erase(it);
507	}
508
509	if (pszValue)
510	{
511	GuestProcessStreamValue val(pszValue);
512	mPairs[Utf8Key] = val;
513	}
514	}
515	catch (const std::exception &ex)
516	{
517	RT_NOREF(ex);
518	}
519	return rc;
520	}
521
522	///////////////////////////////////////////////////////////////////////////////
523
524	GuestProcessStream::GuestProcessStream(void)
525	: m_cbAllocated(0),
526	m_cbUsed(0),
527	m_offBuffer(0),
528	m_pbBuffer(NULL)
529	{
530
531	}
532
533	GuestProcessStream::~GuestProcessStream(void)
534	{
535	Destroy();
536	}
537
538	/**
539	* Adds data to the internal parser buffer. Useful if there
540	* are multiple rounds of adding data needed.
541	*
542	* @return VBox status code.
543	* @param pbData Pointer to data to add.
544	* @param cbData Size (in bytes) of data to add.
545	*/
546	int GuestProcessStream::AddData(const BYTE *pbData, size_t cbData)
547	{
548	AssertPtrReturn(pbData, VERR_INVALID_POINTER);
549	AssertReturn(cbData, VERR_INVALID_PARAMETER);
550
551	int rc = VINF_SUCCESS;
552
553	/* Rewind the buffer if it's empty. */
554	size_t cbInBuf = m_cbUsed - m_offBuffer;
555	bool const fAddToSet = cbInBuf == 0;
556	if (fAddToSet)
557	m_cbUsed = m_offBuffer = 0;
558
559	/* Try and see if we can simply append the data. */
560	if (cbData + m_cbUsed <= m_cbAllocated)
561	{
562	memcpy(&m_pbBuffer[m_cbUsed], pbData, cbData);
563	m_cbUsed += cbData;
564	}
565	else
566	{
567	/* Move any buffered data to the front. */
568	cbInBuf = m_cbUsed - m_offBuffer;
569	if (cbInBuf == 0)
570	m_cbUsed = m_offBuffer = 0;
571	else if (m_offBuffer) /* Do we have something to move? */
572	{
573	memmove(m_pbBuffer, &m_pbBuffer[m_offBuffer], cbInBuf);
574	m_cbUsed = cbInBuf;
575	m_offBuffer = 0;
576	}
577
578	/* Do we need to grow the buffer? */
579	if (cbData + m_cbUsed > m_cbAllocated)
580	{
581	/** @todo Put an upper limit on the allocation? */
582	size_t cbAlloc = m_cbUsed + cbData;
583	cbAlloc = RT_ALIGN_Z(cbAlloc, _64K);
584	void *pvNew = RTMemRealloc(m_pbBuffer, cbAlloc);
585	if (pvNew)
586	{
587	m_pbBuffer = (uint8_t *)pvNew;
588	m_cbAllocated = cbAlloc;
589	}
590	else
591	rc = VERR_NO_MEMORY;
592	}
593
594	/* Finally, copy the data. */
595	if (RT_SUCCESS(rc))
596	{
597	if (cbData + m_cbUsed <= m_cbAllocated)
598	{
599	memcpy(&m_pbBuffer[m_cbUsed], pbData, cbData);
600	m_cbUsed += cbData;
601	}
602	else
603	rc = VERR_BUFFER_OVERFLOW;
604	}
605	}
606
607	return rc;
608	}
609
610	/**
611	* Destroys the internal data buffer.
612	*/
613	void GuestProcessStream::Destroy(void)
614	{
615	if (m_pbBuffer)
616	{
617	RTMemFree(m_pbBuffer);
618	m_pbBuffer = NULL;
619	}
620
621	m_cbAllocated = 0;
622	m_cbUsed = 0;
623	m_offBuffer = 0;
624	}
625
626	#ifdef DEBUG
627	/**
628	* Dumps the raw guest process output to a file on the host.
629	* If the file on the host already exists, it will be overwritten.
630	*
631	* @param pszFile Absolute path to host file to dump the output to.
632	*/
633	void GuestProcessStream::Dump(const char *pszFile)
634	{
635	LogFlowFunc(("Dumping contents of stream=0x%p (cbAlloc=%u, cbSize=%u, cbOff=%u) to %s\n",
636	m_pbBuffer, m_cbAllocated, m_cbUsed, m_offBuffer, pszFile));
637
638	RTFILE hFile;
639	int rc = RTFileOpen(&hFile, pszFile, RTFILE_O_CREATE_REPLACE \| RTFILE_O_WRITE \| RTFILE_O_DENY_WRITE);
640	if (RT_SUCCESS(rc))
641	{
642	rc = RTFileWrite(hFile, m_pbBuffer, m_cbUsed, NULL /* pcbWritten */);
643	RTFileClose(hFile);
644	}
645	}
646	#endif
647
648	/**
649	* Tries to parse the next upcoming pair block within the internal
650	* buffer.
651	*
652	* Returns VERR_NO_DATA is no data is in internal buffer or buffer has been
653	* completely parsed already.
654	*
655	* Returns VERR_MORE_DATA if current block was parsed (with zero or more pairs
656	* stored in stream block) but still contains incomplete (unterminated)
657	* data.
658	*
659	* Returns VINF_SUCCESS if current block was parsed until the next upcoming
660	* block (with zero or more pairs stored in stream block).
661	*
662	* @return VBox status code.
663	* @param streamBlock Reference to guest stream block to fill.
664	*/
665	int GuestProcessStream::ParseBlock(GuestProcessStreamBlock &streamBlock)
666	{
667	if ( !m_pbBuffer
668	\|\| !m_cbUsed)
669	{
670	return VERR_NO_DATA;
671	}
672
673	AssertReturn(m_offBuffer <= m_cbUsed, VERR_INVALID_PARAMETER);
674	if (m_offBuffer == m_cbUsed)
675	return VERR_NO_DATA;
676
677	int rc = VINF_SUCCESS;
678
679	char pszOff = (char)&m_pbBuffer[m_offBuffer];
680	char *pszStart = pszOff;
681	uint32_t uDistance;
682	while (*pszStart)
683	{
684	size_t pairLen = strlen(pszStart);
685	uDistance = (pszStart - pszOff);
686	if (m_offBuffer + uDistance + pairLen + 1 >= m_cbUsed)
687	{
688	rc = VERR_MORE_DATA;
689	break;
690	}
691	else
692	{
693	char *pszSep = strchr(pszStart, '=');
694	char *pszVal = NULL;
695	if (pszSep)
696	pszVal = pszSep + 1;
697	if (!pszSep \|\| !pszVal)
698	{
699	rc = VERR_MORE_DATA;
700	break;
701	}
702
703	/* Terminate the separator so that we can
704	* use pszStart as our key from now on. */
705	*pszSep = '\0';
706
707	rc = streamBlock.SetValue(pszStart, pszVal);
708	if (RT_FAILURE(rc))
709	return rc;
710	}
711
712	/* Next pair. */
713	pszStart += pairLen + 1;
714	}
715
716	/* If we did not do any movement but we have stuff left
717	* in our buffer just skip the current termination so that
718	* we can try next time. */
719	uDistance = (pszStart - pszOff);
720	if ( !uDistance
721	&& *pszStart == '\0'
722	&& m_offBuffer < m_cbUsed)
723	{
724	uDistance++;
725	}
726	m_offBuffer += uDistance;
727
728	return rc;
729	}
730
731	GuestBase::GuestBase(void)
732	: mConsole(NULL)
733	, mNextContextID(RTRandU32() % VBOX_GUESTCTRL_MAX_CONTEXTS)
734	{
735	}
736
737	GuestBase::~GuestBase(void)
738	{
739	}
740
741	/**
742	* Separate initialization function for the base class.
743	*
744	* @returns VBox status code.
745	*/
746	int GuestBase::baseInit(void)
747	{
748	int rc = RTCritSectInit(&mWaitEventCritSect);
749
750	LogFlowFuncLeaveRC(rc);
751	return rc;
752	}
753
754	/**
755	* Separate uninitialization function for the base class.
756	*/
757	void GuestBase::baseUninit(void)
758	{
759	LogFlowThisFuncEnter();
760
761	/* Make sure to cancel any outstanding wait events. */
762	int rc2 = cancelWaitEvents();
763	AssertRC(rc2);
764
765	rc2 = RTCritSectDelete(&mWaitEventCritSect);
766	AssertRC(rc2);
767
768	LogFlowFuncLeaveRC(rc2);
769	/* No return value. */
770	}
771
772	/**
773	* Cancels all outstanding wait events.
774	*
775	* @returns VBox status code.
776	*/
777	int GuestBase::cancelWaitEvents(void)
778	{
779	LogFlowThisFuncEnter();
780
781	int rc = RTCritSectEnter(&mWaitEventCritSect);
782	if (RT_SUCCESS(rc))
783	{
784	GuestEventGroup::iterator itEventGroups = mWaitEventGroups.begin();
785	while (itEventGroups != mWaitEventGroups.end())
786	{
787	GuestWaitEvents::iterator itEvents = itEventGroups->second.begin();
788	while (itEvents != itEventGroups->second.end())
789	{
790	GuestWaitEvent *pEvent = itEvents->second;
791	AssertPtr(pEvent);
792
793	/*
794	* Just cancel the event, but don't remove it from the
795	* wait events map. Don't delete it though, this (hopefully)
796	* is done by the caller using unregisterWaitEvent().
797	*/
798	int rc2 = pEvent->Cancel();
799	AssertRC(rc2);
800
801	++itEvents;
802	}
803
804	++itEventGroups;
805	}
806
807	int rc2 = RTCritSectLeave(&mWaitEventCritSect);
808	if (RT_SUCCESS(rc))
809	rc = rc2;
810	}
811
812	LogFlowFuncLeaveRC(rc);
813	return rc;
814	}
815
816	/**
817	* Handles generic messages not bound to a specific object type.
818	*
819	* @return VBox status code. VERR_NOT_FOUND if no handler has been found or VERR_NOT_SUPPORTED
820	* if this class does not support the specified callback.
821	* @param pCtxCb Host callback context.
822	* @param pSvcCb Service callback data.
823	*/
824	int GuestBase::dispatchGeneric(PVBOXGUESTCTRLHOSTCBCTX pCtxCb, PVBOXGUESTCTRLHOSTCALLBACK pSvcCb)
825	{
826	LogFlowFunc(("pCtxCb=%p, pSvcCb=%p\n", pCtxCb, pSvcCb));
827
828	AssertPtrReturn(pCtxCb, VERR_INVALID_POINTER);
829	AssertPtrReturn(pSvcCb, VERR_INVALID_POINTER);
830
831	int vrc;
832
833	try
834	{
835	Log2Func(("uFunc=%RU32, cParms=%RU32\n", pCtxCb->uMessage, pSvcCb->mParms));
836
837	switch (pCtxCb->uMessage)
838	{
839	case GUEST_MSG_PROGRESS_UPDATE:
840	vrc = VINF_SUCCESS;
841	break;
842
843	case GUEST_MSG_REPLY:
844	{
845	if (pSvcCb->mParms >= 4)
846	{
847	int idx = 1; /* Current parameter index. */
848	CALLBACKDATA_MSG_REPLY dataCb;
849	/* pSvcCb->mpaParms[0] always contains the context ID. */
850	vrc = HGCMSvcGetU32(&pSvcCb->mpaParms[idx++], &dataCb.uType);
851	AssertRCReturn(vrc, vrc);
852	vrc = HGCMSvcGetU32(&pSvcCb->mpaParms[idx++], &dataCb.rc);
853	AssertRCReturn(vrc, vrc);
854	vrc = HGCMSvcGetPv(&pSvcCb->mpaParms[idx++], &dataCb.pvPayload, &dataCb.cbPayload);
855	AssertRCReturn(vrc, vrc);
856
857	GuestWaitEventPayload evPayload(dataCb.uType, dataCb.pvPayload, dataCb.cbPayload); /* This bugger throws int. */
858	vrc = signalWaitEventInternal(pCtxCb, dataCb.rc, &evPayload);
859	}
860	else
861	vrc = VERR_INVALID_PARAMETER;
862	break;
863	}
864
865	default:
866	vrc = VERR_NOT_SUPPORTED;
867	break;
868	}
869	}
870	catch (std::bad_alloc &)
871	{
872	vrc = VERR_NO_MEMORY;
873	}
874	catch (int rc)
875	{
876	vrc = rc;
877	}
878
879	LogFlowFuncLeaveRC(vrc);
880	return vrc;
881	}
882
883	/**
884	* Generates a context ID (CID) by incrementing the object's count.
885	* A CID consists of a session ID, an object ID and a count.
886	*
887	* Note: This function does not guarantee that the returned CID is unique;
888	* the caller has to take care of that and eventually retry.
889	*
890	* @returns VBox status code.
891	* @param uSessionID Session ID to use for CID generation.
892	* @param uObjectID Object ID to use for CID generation.
893	* @param puContextID Where to store the generated CID on success.
894	*/
895	int GuestBase::generateContextID(uint32_t uSessionID, uint32_t uObjectID, uint32_t *puContextID)
896	{
897	AssertPtrReturn(puContextID, VERR_INVALID_POINTER);
898
899	if ( uSessionID >= VBOX_GUESTCTRL_MAX_SESSIONS
900	\|\| uObjectID >= VBOX_GUESTCTRL_MAX_OBJECTS)
901	return VERR_INVALID_PARAMETER;
902
903	uint32_t uCount = ASMAtomicIncU32(&mNextContextID);
904	uCount %= VBOX_GUESTCTRL_MAX_CONTEXTS;
905
906	uint32_t uNewContextID = VBOX_GUESTCTRL_CONTEXTID_MAKE(uSessionID, uObjectID, uCount);
907
908	*puContextID = uNewContextID;
909
910	#if 0
911	LogFlowThisFunc(("mNextContextID=%RU32, uSessionID=%RU32, uObjectID=%RU32, uCount=%RU32, uNewContextID=%RU32\n",
912	mNextContextID, uSessionID, uObjectID, uCount, uNewContextID));
913	#endif
914	return VINF_SUCCESS;
915	}
916
917	/**
918	* Registers (creates) a new wait event based on a given session and object ID.
919	*
920	* From those IDs an unique context ID (CID) will be built, which only can be
921	* around once at a time.
922	*
923	* @returns VBox status code.
924	* @retval VERR_GSTCTL_MAX_CID_COUNT_REACHED if unable to generate a free context ID (CID, the count part (bits 15:0)).
925	* @param uSessionID Session ID to register wait event for.
926	* @param uObjectID Object ID to register wait event for.
927	* @param ppEvent Pointer to registered (created) wait event on success.
928	* Must be destroyed with unregisterWaitEvent().
929	*/
930	int GuestBase::registerWaitEvent(uint32_t uSessionID, uint32_t uObjectID, GuestWaitEvent **ppEvent)
931	{
932	GuestEventTypes eventTypesEmpty;
933	return registerWaitEventEx(uSessionID, uObjectID, eventTypesEmpty, ppEvent);
934	}
935
936	/**
937	* Creates and registers a new wait event object that waits on a set of events
938	* related to a given object within the session.
939	*
940	* From the session ID and object ID a one-time unique context ID (CID) is built
941	* for this wait object. Normally the CID is then passed to the guest along
942	* with a request, and the guest passed the CID back with the reply. The
943	* handler for the reply then emits a signal on the event type associated with
944	* the reply, which includes signalling the object returned by this method and
945	* the waking up the thread waiting on it.
946	*
947	* @returns VBox status code.
948	* @retval VERR_GSTCTL_MAX_CID_COUNT_REACHED if unable to generate a free context ID (CID, the count part (bits 15:0)).
949	* @param uSessionID Session ID to register wait event for.
950	* @param uObjectID Object ID to register wait event for.
951	* @param lstEvents List of events to register the wait event for.
952	* @param ppEvent Pointer to registered (created) wait event on success.
953	* Must be destroyed with unregisterWaitEvent().
954	*/
955	int GuestBase::registerWaitEventEx(uint32_t uSessionID, uint32_t uObjectID, const GuestEventTypes &lstEvents,
956	GuestWaitEvent **ppEvent)
957	{
958	AssertPtrReturn(ppEvent, VERR_INVALID_POINTER);
959
960	uint32_t idContext;
961	int rc = generateContextID(uSessionID, uObjectID, &idContext);
962	AssertRCReturn(rc, rc);
963
964	GuestWaitEvent *pEvent = new GuestWaitEvent();
965	AssertPtrReturn(pEvent, VERR_NO_MEMORY);
966
967	rc = pEvent->Init(idContext, lstEvents);
968	AssertRCReturn(rc, rc);
969
970	LogFlowThisFunc(("New event=%p, CID=%RU32\n", pEvent, idContext));
971
972	rc = RTCritSectEnter(&mWaitEventCritSect);
973	if (RT_SUCCESS(rc))
974	{
975	/*
976	* Check that we don't have any context ID collisions (should be very unlikely).
977	*
978	* The ASSUMPTION here is that mWaitEvents has all the same events as
979	* mWaitEventGroups, so it suffices to check one of the two.
980	*/
981	if (mWaitEvents.find(idContext) != mWaitEvents.end())
982	{
983	uint32_t cTries = 0;
984	do
985	{
986	rc = generateContextID(uSessionID, uObjectID, &idContext);
987	AssertRCBreak(rc);
988	LogFunc(("Found context ID duplicate; trying a different context ID: %#x\n", idContext));
989	if (mWaitEvents.find(idContext) != mWaitEvents.end())
990	rc = VERR_GSTCTL_MAX_CID_COUNT_REACHED;
991	} while (RT_FAILURE_NP(rc) && cTries++ < 10);
992	}
993	if (RT_SUCCESS(rc))
994	{
995	/*
996	* Insert event into matching event group. This is for faster per-group lookup of all events later.
997	*/
998	uint32_t cInserts = 0;
999	for (GuestEventTypes::const_iterator ItType = lstEvents.begin(); ItType != lstEvents.end(); ++ItType)
1000	{
1001	GuestWaitEvents &eventGroup = mWaitEventGroups[*ItType];
1002	if (eventGroup.find(idContext) == eventGroup.end())
1003	{
1004	try
1005	{
1006	eventGroup.insert(std::pair<uint32_t, GuestWaitEvent *>(idContext, pEvent));
1007	cInserts++;
1008	}
1009	catch (std::bad_alloc &)
1010	{
1011	while (ItType != lstEvents.begin())
1012	{
1013	--ItType;
1014	mWaitEventGroups[*ItType].erase(idContext);
1015	}
1016	rc = VERR_NO_MEMORY;
1017	break;
1018	}
1019	}
1020	else
1021	Assert(cInserts > 0); /* else: lstEvents has duplicate entries. */
1022	}
1023	if (RT_SUCCESS(rc))
1024	{
1025	Assert(cInserts > 0 \|\| lstEvents.size() == 0);
1026	RT_NOREF(cInserts);
1027
1028	/*
1029	* Register event in the regular event list.
1030	*/
1031	try
1032	{
1033	mWaitEvents[idContext] = pEvent;
1034	}
1035	catch (std::bad_alloc &)
1036	{
1037	for (GuestEventTypes::const_iterator ItType = lstEvents.begin(); ItType != lstEvents.end(); ++ItType)
1038	mWaitEventGroups[*ItType].erase(idContext);
1039	rc = VERR_NO_MEMORY;
1040	}
1041	}
1042	}
1043
1044	RTCritSectLeave(&mWaitEventCritSect);
1045	}
1046	if (RT_SUCCESS(rc))
1047	{
1048	*ppEvent = pEvent;
1049	return rc;
1050	}
1051
1052	if (pEvent)
1053	delete pEvent;
1054
1055	return rc;
1056	}
1057
1058	/**
1059	* Signals all wait events of a specific type (if found)
1060	* and notifies external events accordingly.
1061	*
1062	* @returns VBox status code.
1063	* @param aType Event type to signal.
1064	* @param aEvent Which external event to notify.
1065	*/
1066	int GuestBase::signalWaitEvent(VBoxEventType_T aType, IEvent *aEvent)
1067	{
1068	int rc = RTCritSectEnter(&mWaitEventCritSect);
1069	#ifdef DEBUG
1070	uint32_t cEvents = 0;
1071	#endif
1072	if (RT_SUCCESS(rc))
1073	{
1074	GuestEventGroup::iterator itGroup = mWaitEventGroups.find(aType);
1075	if (itGroup != mWaitEventGroups.end())
1076	{
1077	/* Signal all events in the group, leaving the group empty afterwards. */
1078	GuestWaitEvents::iterator ItWaitEvt;
1079	while ((ItWaitEvt = itGroup->second.begin()) != itGroup->second.end())
1080	{
1081	LogFlowThisFunc(("Signalling event=%p, type=%ld (CID %#x: Session=%RU32, Object=%RU32, Count=%RU32) ...\n",
1082	ItWaitEvt->second, aType, ItWaitEvt->first, VBOX_GUESTCTRL_CONTEXTID_GET_SESSION(ItWaitEvt->first),
1083	VBOX_GUESTCTRL_CONTEXTID_GET_OBJECT(ItWaitEvt->first), VBOX_GUESTCTRL_CONTEXTID_GET_COUNT(ItWaitEvt->first)));
1084
1085	int rc2 = ItWaitEvt->second->SignalExternal(aEvent);
1086	AssertRC(rc2);
1087
1088	/* Take down the wait event object details before we erase it from this list and invalid ItGrpEvt. */
1089	const GuestEventTypes &EvtTypes = ItWaitEvt->second->Types();
1090	uint32_t idContext = ItWaitEvt->first;
1091	itGroup->second.erase(ItWaitEvt);
1092
1093	for (GuestEventTypes::const_iterator ItType = EvtTypes.begin(); ItType != EvtTypes.end(); ++ItType)
1094	{
1095	GuestEventGroup::iterator EvtTypeGrp = mWaitEventGroups.find(*ItType);
1096	if (EvtTypeGrp != mWaitEventGroups.end())
1097	{
1098	ItWaitEvt = EvtTypeGrp->second.find(idContext);
1099	if (ItWaitEvt != EvtTypeGrp->second.end())
1100	{
1101	LogFlowThisFunc(("Removing event %p (CID %#x) from type %d group\n", ItWaitEvt->second, idContext, *ItType));
1102	EvtTypeGrp->second.erase(ItWaitEvt);
1103	LogFlowThisFunc(("%zu events left for type %d\n", EvtTypeGrp->second.size(), *ItType));
1104	Assert(EvtTypeGrp->second.find(idContext) == EvtTypeGrp->second.end()); /* no duplicates */
1105	}
1106	}
1107	}
1108	}
1109	}
1110
1111	int rc2 = RTCritSectLeave(&mWaitEventCritSect);
1112	if (RT_SUCCESS(rc))
1113	rc = rc2;
1114	}
1115
1116	#ifdef DEBUG
1117	LogFlowThisFunc(("Signalled %RU32 events, rc=%Rrc\n", cEvents, rc));
1118	#endif
1119	return rc;
1120	}
1121
1122	/**
1123	* Signals a wait event which is registered to a specific callback (bound to a context ID (CID)).
1124	*
1125	* @returns VBox status code.
1126	* @param pCbCtx Pointer to host service callback context.
1127	* @param rcGuest Guest return code (rc) to set additionally, if rc is set to VERR_GSTCTL_GUEST_ERROR.
1128	* @param pPayload Additional wait event payload data set set on return. Optional.
1129	*/
1130	int GuestBase::signalWaitEventInternal(PVBOXGUESTCTRLHOSTCBCTX pCbCtx,
1131	int rcGuest, const GuestWaitEventPayload *pPayload)
1132	{
1133	if (RT_SUCCESS(rcGuest))
1134	return signalWaitEventInternalEx(pCbCtx, VINF_SUCCESS,
1135	0 /* Guest rc */, pPayload);
1136
1137	return signalWaitEventInternalEx(pCbCtx, VERR_GSTCTL_GUEST_ERROR,
1138	rcGuest, pPayload);
1139	}
1140
1141	/**
1142	* Signals a wait event which is registered to a specific callback (bound to a context ID (CID)).
1143	* Extended version.
1144	*
1145	* @returns VBox status code.
1146	* @param pCbCtx Pointer to host service callback context.
1147	* @param rc Return code (rc) to set as wait result.
1148	* @param rcGuest Guest return code (rc) to set additionally, if rc is set to VERR_GSTCTL_GUEST_ERROR.
1149	* @param pPayload Additional wait event payload data set set on return. Optional.
1150	*/
1151	int GuestBase::signalWaitEventInternalEx(PVBOXGUESTCTRLHOSTCBCTX pCbCtx,
1152	int rc, int rcGuest,
1153	const GuestWaitEventPayload *pPayload)
1154	{
1155	AssertPtrReturn(pCbCtx, VERR_INVALID_POINTER);
1156	/* pPayload is optional. */
1157
1158	int rc2 = RTCritSectEnter(&mWaitEventCritSect);
1159	if (RT_SUCCESS(rc2))
1160	{
1161	GuestWaitEvents::iterator itEvent = mWaitEvents.find(pCbCtx->uContextID);
1162	if (itEvent != mWaitEvents.end())
1163	{
1164	LogFlowThisFunc(("Signalling event=%p (CID %RU32, rc=%Rrc, rcGuest=%Rrc, pPayload=%p) ...\n",
1165	itEvent->second, itEvent->first, rc, rcGuest, pPayload));
1166	GuestWaitEvent *pEvent = itEvent->second;
1167	AssertPtr(pEvent);
1168	rc2 = pEvent->SignalInternal(rc, rcGuest, pPayload);
1169	}
1170	else
1171	rc2 = VERR_NOT_FOUND;
1172
1173	int rc3 = RTCritSectLeave(&mWaitEventCritSect);
1174	if (RT_SUCCESS(rc2))
1175	rc2 = rc3;
1176	}
1177
1178	return rc2;
1179	}
1180
1181	/**
1182	* Unregisters (deletes) a wait event.
1183	*
1184	* After successful unregistration the event will not be valid anymore.
1185	*
1186	* @returns VBox status code.
1187	* @param pWaitEvt Wait event to unregister (delete).
1188	*/
1189	int GuestBase::unregisterWaitEvent(GuestWaitEvent *pWaitEvt)
1190	{
1191	if (!pWaitEvt) /* Nothing to unregister. */
1192	return VINF_SUCCESS;
1193
1194	int rc = RTCritSectEnter(&mWaitEventCritSect);
1195	if (RT_SUCCESS(rc))
1196	{
1197	LogFlowThisFunc(("pWaitEvt=%p\n", pWaitEvt));
1198
1199	/** @todo r=bird: One way of optimizing this would be to use the pointer
1200	* instead of the context ID as index into the groups, i.e. revert the value
1201	* pair for the GuestWaitEvents type.
1202	*
1203	* An even more efficent way, would be to not use sexy std::xxx containers for
1204	* the types, but iprt/list.h, as that would just be a RTListNodeRemove call for
1205	* each type w/o needing to iterate much at all. I.e. add a struct {
1206	* RTLISTNODE, GuestWaitEvent *pSelf} array to GuestWaitEvent, and change
1207	* GuestEventGroup to std::map<VBoxEventType_T, RTListAnchorClass>
1208	* (RTListAnchorClass == RTLISTANCHOR wrapper with a constructor)).
1209	*
1210	* P.S. the try/catch is now longer needed after I changed pWaitEvt->Types() to
1211	* return a const reference rather than a copy of the type list (and it think it
1212	* is safe to assume iterators are not hitting the heap). Copy vs reference is
1213	* an easy mistake to make in C++.
1214	*
1215	* P.P.S. The mWaitEventGroups optimization is probably just a lot of extra work
1216	* with little payoff.
1217	*/
1218	try
1219	{
1220	/* Remove the event from all event type groups. */
1221	const GuestEventTypes &lstTypes = pWaitEvt->Types();
1222	for (GuestEventTypes::const_iterator itType = lstTypes.begin();
1223	itType != lstTypes.end(); ++itType)
1224	{
1225	/** @todo Slow O(n) lookup. Optimize this. */
1226	GuestWaitEvents::iterator itCurEvent = mWaitEventGroups[(*itType)].begin();
1227	while (itCurEvent != mWaitEventGroups[(*itType)].end())
1228	{
1229	if (itCurEvent->second == pWaitEvt)
1230	{
1231	mWaitEventGroups[(*itType)].erase(itCurEvent);
1232	break;
1233	}
1234	++itCurEvent;
1235	}
1236	}
1237
1238	/* Remove the event from the general event list as well. */
1239	GuestWaitEvents::iterator itEvent = mWaitEvents.find(pWaitEvt->ContextID());
1240
1241	Assert(itEvent != mWaitEvents.end());
1242	Assert(itEvent->second == pWaitEvt);
1243
1244	mWaitEvents.erase(itEvent);
1245
1246	delete pWaitEvt;
1247	pWaitEvt = NULL;
1248	}
1249	catch (const std::exception &ex)
1250	{
1251	RT_NOREF(ex);
1252	AssertFailedStmt(rc = VERR_NOT_FOUND);
1253	}
1254
1255	int rc2 = RTCritSectLeave(&mWaitEventCritSect);
1256	if (RT_SUCCESS(rc))
1257	rc = rc2;
1258	}
1259
1260	return rc;
1261	}
1262
1263	/**
1264	* Waits for an already registered guest wait event.
1265	*
1266	* @return VBox status code.
1267	* @retval VERR_GSTCTL_GUEST_ERROR may be returned, call GuestResult() to get
1268	* the actual result.
1269	*
1270	* @param pWaitEvt Pointer to event to wait for.
1271	* @param msTimeout Timeout (in ms) for waiting.
1272	* @param pType Event type of following IEvent. Optional.
1273	* @param ppEvent Pointer to IEvent which got triggered for this event. Optional.
1274	*/
1275	int GuestBase::waitForEvent(GuestWaitEvent pWaitEvt, uint32_t msTimeout, VBoxEventType_T pType, IEvent **ppEvent)
1276	{
1277	AssertPtrReturn(pWaitEvt, VERR_INVALID_POINTER);
1278	/* pType is optional. */
1279	/* ppEvent is optional. */
1280
1281	int vrc = pWaitEvt->Wait(msTimeout);
1282	if (RT_SUCCESS(vrc))
1283	{
1284	const ComPtr<IEvent> pThisEvent = pWaitEvt->Event();
1285	if (pThisEvent.isNotNull()) /* Make sure that we actually have an event associated. */
1286	{
1287	if (pType)
1288	{
1289	HRESULT hr = pThisEvent->COMGETTER(Type)(pType);
1290	if (FAILED(hr))
1291	vrc = VERR_COM_UNEXPECTED;
1292	}
1293	if ( RT_SUCCESS(vrc)
1294	&& ppEvent)
1295	pThisEvent.queryInterfaceTo(ppEvent);
1296
1297	unconst(pThisEvent).setNull();
1298	}
1299	}
1300
1301	return vrc;
1302	}
1303
1304	/**
1305	* Converts RTFMODE to FsObjType_T.
1306	*
1307	* @return Converted FsObjType_T type.
1308	* @param fMode RTFMODE to convert.
1309	*/
1310	/* static */
1311	FsObjType_T GuestBase::fileModeToFsObjType(RTFMODE fMode)
1312	{
1313	if (RTFS_IS_FILE(fMode)) return FsObjType_File;
1314	else if (RTFS_IS_DIRECTORY(fMode)) return FsObjType_Directory;
1315	else if (RTFS_IS_SYMLINK(fMode)) return FsObjType_Symlink;
1316
1317	return FsObjType_Unknown;
1318	}
1319
1320	GuestObject::GuestObject(void)
1321	: mSession(NULL),
1322	mObjectID(0)
1323	{
1324	}
1325
1326	GuestObject::~GuestObject(void)
1327	{
1328	}
1329
1330	/**
1331	* Binds this guest (control) object to a specific guest (control) session.
1332	*
1333	* @returns VBox status code.
1334	* @param pConsole Pointer to console object to use.
1335	* @param pSession Pointer to session to bind this object to.
1336	* @param uObjectID Object ID for this object to use within that specific session.
1337	* Each object ID must be unique per session.
1338	*/
1339	int GuestObject::bindToSession(Console pConsole, GuestSession pSession, uint32_t uObjectID)
1340	{
1341	AssertPtrReturn(pConsole, VERR_INVALID_POINTER);
1342	AssertPtrReturn(pSession, VERR_INVALID_POINTER);
1343
1344	mConsole = pConsole;
1345	mSession = pSession;
1346	mObjectID = uObjectID;
1347
1348	return VINF_SUCCESS;
1349	}
1350
1351	/**
1352	* Registers (creates) a new wait event.
1353	*
1354	* @returns VBox status code.
1355	* @param lstEvents List of events which the new wait event gets triggered at.
1356	* @param ppEvent Returns the new wait event on success.
1357	*/
1358	int GuestObject::registerWaitEvent(const GuestEventTypes &lstEvents,
1359	GuestWaitEvent **ppEvent)
1360	{
1361	AssertPtr(mSession);
1362	return GuestBase::registerWaitEventEx(mSession->i_getId(), mObjectID, lstEvents, ppEvent);
1363	}
1364
1365	/**
1366	* Sends a HGCM message to the guest (via the guest control host service).
1367	*
1368	* @returns VBox status code.
1369	* @param uMessage Message ID of message to send.
1370	* @param cParms Number of HGCM message parameters to send.
1371	* @param paParms Array of HGCM message parameters to send.
1372	*/
1373	int GuestObject::sendMessage(uint32_t uMessage, uint32_t cParms, PVBOXHGCMSVCPARM paParms)
1374	{
1375	#ifndef VBOX_GUESTCTRL_TEST_CASE
1376	ComObjPtr<Console> pConsole = mConsole;
1377	Assert(!pConsole.isNull());
1378
1379	int vrc = VERR_HGCM_SERVICE_NOT_FOUND;
1380
1381	/* Forward the information to the VMM device. */
1382	VMMDev *pVMMDev = pConsole->i_getVMMDev();
1383	if (pVMMDev)
1384	{
1385	/* HACK ALERT! We extend the first parameter to 64-bit and use the
1386	two topmost bits for call destination information. */
1387	Assert(paParms[0].type == VBOX_HGCM_SVC_PARM_32BIT);
1388	paParms[0].type = VBOX_HGCM_SVC_PARM_64BIT;
1389	paParms[0].u.uint64 = (uint64_t)paParms[0].u.uint32 \| VBOX_GUESTCTRL_DST_SESSION;
1390
1391	/* Make the call. */
1392	LogFlowThisFunc(("uMessage=%RU32, cParms=%RU32\n", uMessage, cParms));
1393	vrc = pVMMDev->hgcmHostCall(HGCMSERVICE_NAME, uMessage, cParms, paParms);
1394	if (RT_FAILURE(vrc))
1395	{
1396	/** @todo What to do here? */
1397	}
1398	}
1399	#else
1400	LogFlowThisFuncEnter();
1401
1402	/* Not needed within testcases. */
1403	RT_NOREF(uMessage, cParms, paParms);
1404	int vrc = VINF_SUCCESS;
1405	#endif
1406	return vrc;
1407	}
1408
1409	GuestWaitEventBase::GuestWaitEventBase(void)
1410	: mfAborted(false),
1411	mCID(0),
1412	mEventSem(NIL_RTSEMEVENT),
1413	mRc(VINF_SUCCESS),
1414	mGuestRc(VINF_SUCCESS)
1415	{
1416	}
1417
1418	GuestWaitEventBase::~GuestWaitEventBase(void)
1419	{
1420	if (mEventSem != NIL_RTSEMEVENT)
1421	{
1422	RTSemEventDestroy(mEventSem);
1423	mEventSem = NIL_RTSEMEVENT;
1424	}
1425	}
1426
1427	/**
1428	* Initializes a wait event with a specific context ID (CID).
1429	*
1430	* @returns VBox status code.
1431	* @param uCID Context ID (CID) to initialize wait event with.
1432	*/
1433	int GuestWaitEventBase::Init(uint32_t uCID)
1434	{
1435	mCID = uCID;
1436
1437	return RTSemEventCreate(&mEventSem);
1438	}
1439
1440	/**
1441	* Signals a wait event.
1442	*
1443	* @returns VBox status code.
1444	* @param rc Return code (rc) to set as wait result.
1445	* @param rcGuest Guest return code (rc) to set additionally, if rc is set to VERR_GSTCTL_GUEST_ERROR.
1446	* @param pPayload Additional wait event payload data set set on return. Optional.
1447	*/
1448	int GuestWaitEventBase::SignalInternal(int rc, int rcGuest,
1449	const GuestWaitEventPayload *pPayload)
1450	{
1451	if (mfAborted)
1452	return VERR_CANCELLED;
1453
1454	#ifdef VBOX_STRICT
1455	if (rc == VERR_GSTCTL_GUEST_ERROR)
1456	AssertMsg(RT_FAILURE(rcGuest), ("Guest error indicated but no actual guest error set (%Rrc)\n", rcGuest));
1457	else
1458	AssertMsg(RT_SUCCESS(rcGuest), ("No guest error indicated but actual guest error set (%Rrc)\n", rcGuest));
1459	#endif
1460
1461	int rc2;
1462	if (pPayload)
1463	rc2 = mPayload.CopyFromDeep(*pPayload);
1464	else
1465	rc2 = VINF_SUCCESS;
1466	if (RT_SUCCESS(rc2))
1467	{
1468	mRc = rc;
1469	mGuestRc = rcGuest;
1470
1471	rc2 = RTSemEventSignal(mEventSem);
1472	}
1473
1474	return rc2;
1475	}
1476
1477	/**
1478	* Waits for the event to get triggered. Will return success if the
1479	* wait was successufl (e.g. was being triggered), otherwise an error will be returned.
1480	*
1481	* @returns VBox status code.
1482	* @retval VERR_GSTCTL_GUEST_ERROR may be returned, call GuestResult() to get
1483	* the actual result.
1484	*
1485	* @param msTimeout Timeout (in ms) to wait.
1486	* Specifiy 0 to wait indefinitely.
1487	*/
1488	int GuestWaitEventBase::Wait(RTMSINTERVAL msTimeout)
1489	{
1490	int rc = VINF_SUCCESS;
1491
1492	if (mfAborted)
1493	rc = VERR_CANCELLED;
1494
1495	if (RT_SUCCESS(rc))
1496	{
1497	AssertReturn(mEventSem != NIL_RTSEMEVENT, VERR_CANCELLED);
1498
1499	rc = RTSemEventWait(mEventSem, msTimeout ? msTimeout : RT_INDEFINITE_WAIT);
1500	if ( RT_SUCCESS(rc)
1501	&& mfAborted)
1502	{
1503	rc = VERR_CANCELLED;
1504	}
1505
1506	if (RT_SUCCESS(rc))
1507	{
1508	/* If waiting succeeded, return the overall
1509	* result code. */
1510	rc = mRc;
1511	}
1512	}
1513
1514	return rc;
1515	}
1516
1517	GuestWaitEvent::GuestWaitEvent(void)
1518	{
1519	}
1520
1521	GuestWaitEvent::~GuestWaitEvent(void)
1522	{
1523
1524	}
1525
1526	/**
1527	* Cancels the event.
1528	*/
1529	int GuestWaitEvent::Cancel(void)
1530	{
1531	if (mfAborted) /* Already aborted? */
1532	return VINF_SUCCESS;
1533
1534	mfAborted = true;
1535
1536	#ifdef DEBUG_andy
1537	LogFlowThisFunc(("Cancelling %p ...\n"));
1538	#endif
1539	return RTSemEventSignal(mEventSem);
1540	}
1541
1542	/**
1543	* Initializes a wait event with a given context ID (CID).
1544	*
1545	* @returns VBox status code.
1546	* @param uCID Context ID to initialize wait event with.
1547	*/
1548	int GuestWaitEvent::Init(uint32_t uCID)
1549	{
1550	return GuestWaitEventBase::Init(uCID);
1551	}
1552
1553	/**
1554	* Initializes a wait event with a given context ID (CID) and a list of event types to wait for.
1555	*
1556	* @returns VBox status code.
1557	* @param uCID Context ID to initialize wait event with.
1558	* @param lstEvents List of event types to wait for this wait event to get signalled.
1559	*/
1560	int GuestWaitEvent::Init(uint32_t uCID, const GuestEventTypes &lstEvents)
1561	{
1562	int rc = GuestWaitEventBase::Init(uCID);
1563	if (RT_SUCCESS(rc))
1564	{
1565	mEventTypes = lstEvents;
1566	}
1567
1568	return rc;
1569	}
1570
1571	/**
1572	* Signals the event.
1573	*
1574	* @return VBox status code.
1575	* @param pEvent Public IEvent to associate.
1576	* Optional.
1577	*/
1578	int GuestWaitEvent::SignalExternal(IEvent *pEvent)
1579	{
1580	if (pEvent)
1581	mEvent = pEvent;
1582
1583	return RTSemEventSignal(mEventSem);
1584	}
1585

Note: See TracBrowser for help on using the repository browser.

source: vbox/trunk/src/VBox/Main/src-client/GuestCtrlPrivate.cpp@ 79133

Download in other formats: