DrvNamedPipe.cpp@ 49882

Last change on this file since 49882 was 44528, checked in by vboxsync, 12 years ago
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1	/* $Id: DrvNamedPipe.cpp 44528 2013-02-04 14:27:54Z vboxsync $ */
2	/** @file
3	* Named pipe / local socket stream driver.
4	*/
5
6	/*
7	* Copyright (C) 2006-2012 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_DRV_NAMEDPIPE
23	#include <VBox/vmm/pdmdrv.h>
24	#include <iprt/assert.h>
25	#include <iprt/file.h>
26	#include <iprt/stream.h>
27	#include <iprt/alloc.h>
28	#include <iprt/string.h>
29	#include <iprt/semaphore.h>
30	#include <iprt/uuid.h>
31
32	#include "VBoxDD.h"
33
34	#ifdef RT_OS_WINDOWS
35	# include <windows.h>
36	#else /* !RT_OS_WINDOWS */
37	# include <errno.h>
38	# include <unistd.h>
39	# include <sys/types.h>
40	# include <sys/socket.h>
41	# include <sys/un.h>
42	# ifndef SHUT_RDWR /* OS/2 */
43	# define SHUT_RDWR 3
44	# endif
45	#endif /* !RT_OS_WINDOWS */
46
47
48	/*******************************************************************************
49	* Defined Constants And Macros *
50	*******************************************************************************/
51	/** Converts a pointer to DRVNAMEDPIPE::IMedia to a PDRVNAMEDPIPE. */
52	#define PDMISTREAM_2_DRVNAMEDPIPE(pInterface) ( (PDRVNAMEDPIPE)((uintptr_t)pInterface - RT_OFFSETOF(DRVNAMEDPIPE, IStream)) )
53
54
55	/*******************************************************************************
56	* Structures and Typedefs *
57	*******************************************************************************/
58	/**
59	* Named pipe driver instance data.
60	*
61	* @implements PDMISTREAM
62	*/
63	typedef struct DRVNAMEDPIPE
64	{
65	/** The stream interface. */
66	PDMISTREAM IStream;
67	/** Pointer to the driver instance. */
68	PPDMDRVINS pDrvIns;
69	/** Pointer to the named pipe file name. (Freed by MM) */
70	char *pszLocation;
71	/** Flag whether VirtualBox represents the server or client side. */
72	bool fIsServer;
73	#ifdef RT_OS_WINDOWS
74	/** File handle of the named pipe. */
75	HANDLE NamedPipe;
76	/** Overlapped structure for writes. */
77	OVERLAPPED OverlappedWrite;
78	/** Overlapped structure for reads. */
79	OVERLAPPED OverlappedRead;
80	/** Listen thread wakeup semaphore */
81	RTSEMEVENTMULTI ListenSem;
82	#else /* !RT_OS_WINDOWS */
83	/** Socket handle of the local socket for server. */
84	int LocalSocketServer;
85	/** Socket handle of the local socket. */
86	int LocalSocket;
87	#endif /* !RT_OS_WINDOWS */
88	/** Thread for listening for new connections. */
89	RTTHREAD ListenThread;
90	/** Flag to signal listening thread to shut down. */
91	bool volatile fShutdown;
92	} DRVNAMEDPIPE, *PDRVNAMEDPIPE;
93
94
95	/*******************************************************************************
96	* Internal Functions *
97	*******************************************************************************/
98
99
100	/** @copydoc PDMISTREAM::pfnRead */
101	static DECLCALLBACK(int) drvNamedPipeRead(PPDMISTREAM pInterface, void pvBuf, size_t pcbRead)
102	{
103	int rc = VINF_SUCCESS;
104	PDRVNAMEDPIPE pThis = PDMISTREAM_2_DRVNAMEDPIPE(pInterface);
105	LogFlow(("%s: pvBuf=%p pcbRead=%#x (%s)\n", __FUNCTION__, pvBuf, pcbRead, pThis->pszLocation));
106
107	Assert(pvBuf);
108	#ifdef RT_OS_WINDOWS
109	if (pThis->NamedPipe != INVALID_HANDLE_VALUE)
110	{
111	DWORD cbReallyRead;
112	pThis->OverlappedRead.Offset = 0;
113	pThis->OverlappedRead.OffsetHigh = 0;
114	if (!ReadFile(pThis->NamedPipe, pvBuf, (DWORD)*pcbRead, &cbReallyRead, &pThis->OverlappedRead))
115	{
116	DWORD uError = GetLastError();
117
118	if ( uError == ERROR_PIPE_LISTENING
119	\|\| uError == ERROR_PIPE_NOT_CONNECTED)
120	{
121	/* No connection yet/anymore */
122	cbReallyRead = 0;
123
124	/* wait a bit or else we'll be called right back. */
125	RTThreadSleep(100);
126	}
127	else
128	{
129	if (uError == ERROR_IO_PENDING)
130	{
131	uError = 0;
132
133	/* Wait for incoming bytes. */
134	if (GetOverlappedResult(pThis->NamedPipe, &pThis->OverlappedRead, &cbReallyRead, TRUE) == FALSE)
135	uError = GetLastError();
136	}
137
138	rc = RTErrConvertFromWin32(uError);
139	Log(("drvNamedPipeRead: ReadFile returned %d (%Rrc)\n", uError, rc));
140	}
141	}
142
143	if (RT_FAILURE(rc))
144	{
145	Log(("drvNamedPipeRead: FileRead returned %Rrc fShutdown=%d\n", rc, pThis->fShutdown));
146	if ( !pThis->fShutdown
147	&& ( rc == VERR_EOF
148	\|\| rc == VERR_BROKEN_PIPE
149	)
150	)
151	{
152	FlushFileBuffers(pThis->NamedPipe);
153	DisconnectNamedPipe(pThis->NamedPipe);
154	if (!pThis->fIsServer)
155	{
156	CloseHandle(pThis->NamedPipe);
157	pThis->NamedPipe = INVALID_HANDLE_VALUE;
158	}
159	/* pretend success */
160	rc = VINF_SUCCESS;
161	}
162	cbReallyRead = 0;
163	}
164	*pcbRead = (size_t)cbReallyRead;
165	}
166	#else /* !RT_OS_WINDOWS */
167	if (pThis->LocalSocket != -1)
168	{
169	ssize_t cbReallyRead;
170	cbReallyRead = recv(pThis->LocalSocket, pvBuf, *pcbRead, 0);
171	if (cbReallyRead == 0)
172	{
173	int tmp = pThis->LocalSocket;
174	pThis->LocalSocket = -1;
175	close(tmp);
176	}
177	else if (cbReallyRead == -1)
178	{
179	cbReallyRead = 0;
180	rc = RTErrConvertFromErrno(errno);
181	}
182	*pcbRead = cbReallyRead;
183	}
184	#endif /* !RT_OS_WINDOWS */
185	else
186	{
187	RTThreadSleep(100);
188	*pcbRead = 0;
189	}
190
191	LogFlow(("%s: pcbRead=%zu returns %Rrc\n", __FUNCTION__, pcbRead, rc));
192	return rc;
193	}
194
195
196	/** @copydoc PDMISTREAM::pfnWrite */
197	static DECLCALLBACK(int) drvNamedPipeWrite(PPDMISTREAM pInterface, const void pvBuf, size_t pcbWrite)
198	{
199	int rc = VINF_SUCCESS;
200	PDRVNAMEDPIPE pThis = PDMISTREAM_2_DRVNAMEDPIPE(pInterface);
201	LogFlow(("%s: pvBuf=%p pcbWrite=%#x (%s)\n", __FUNCTION__, pvBuf, pcbWrite, pThis->pszLocation));
202
203	Assert(pvBuf);
204	#ifdef RT_OS_WINDOWS
205	if (pThis->NamedPipe != INVALID_HANDLE_VALUE)
206	{
207	DWORD cbWritten = (DWORD)*pcbWrite;
208	pThis->OverlappedWrite.Offset = 0;
209	pThis->OverlappedWrite.OffsetHigh = 0;
210	if (!WriteFile(pThis->NamedPipe, pvBuf, cbWritten, NULL, &pThis->OverlappedWrite))
211	{
212	DWORD uError = GetLastError();
213
214	if ( uError == ERROR_PIPE_LISTENING
215	\|\| uError == ERROR_PIPE_NOT_CONNECTED)
216	{
217	/* No connection yet/anymore; just discard the write (pretending everything was written). */;
218	}
219	else if (uError != ERROR_IO_PENDING)
220	{
221	rc = RTErrConvertFromWin32(uError);
222	Log(("drvNamedPipeWrite: WriteFile returned %d (%Rrc)\n", uError, rc));
223	cbWritten = 0;
224	}
225	else
226	{
227	/* Wait for the write to complete. */
228	if (GetOverlappedResult(pThis->NamedPipe, &pThis->OverlappedWrite, &cbWritten, TRUE /bWait/) == FALSE)
229	rc = RTErrConvertFromWin32(uError = GetLastError());
230	}
231	}
232
233	if (RT_FAILURE(rc))
234	{
235	/** @todo WriteFile(pipe) has been observed to return ERROR_NO_DATA
236	* (VERR_NO_DATA) instead of ERROR_BROKEN_PIPE, when the pipe is
237	* disconnected. */
238	if ( rc == VERR_EOF
239	\|\| rc == VERR_BROKEN_PIPE)
240	{
241	FlushFileBuffers(pThis->NamedPipe);
242	DisconnectNamedPipe(pThis->NamedPipe);
243	if (!pThis->fIsServer)
244	{
245	CloseHandle(pThis->NamedPipe);
246	pThis->NamedPipe = INVALID_HANDLE_VALUE;
247	}
248	/* pretend success */
249	rc = VINF_SUCCESS;
250	}
251	cbWritten = 0;
252	}
253	*pcbWrite = cbWritten;
254	}
255	#else /* !RT_OS_WINDOWS */
256	if (pThis->LocalSocket != -1)
257	{
258	ssize_t cbWritten;
259	cbWritten = send(pThis->LocalSocket, pvBuf, *pcbWrite, 0);
260	if (cbWritten == 0)
261	{
262	int tmp = pThis->LocalSocket;
263	pThis->LocalSocket = -1;
264	close(tmp);
265	}
266	else if (cbWritten == -1)
267	{
268	cbWritten = 0;
269	rc = RTErrConvertFromErrno(errno);
270	}
271	*pcbWrite = cbWritten;
272	}
273	#endif /* !RT_OS_WINDOWS */
274
275	LogFlow(("%s: returns %Rrc\n", __FUNCTION__, rc));
276	return rc;
277	}
278
279
280	/**
281	* @interface_method_impl{PDMIBASE,pfnQueryInterface}
282	*/
283	static DECLCALLBACK(void ) drvNamedPipeQueryInterface(PPDMIBASE pInterface, const char pszIID)
284	{
285	PPDMDRVINS pDrvIns = PDMIBASE_2_PDMDRV(pInterface);
286	PDRVNAMEDPIPE pThis = PDMINS_2_DATA(pDrvIns, PDRVNAMEDPIPE);
287	PDMIBASE_RETURN_INTERFACE(pszIID, PDMIBASE, &pDrvIns->IBase);
288	PDMIBASE_RETURN_INTERFACE(pszIID, PDMISTREAM, &pThis->IStream);
289	return NULL;
290	}
291
292
293	/* -=-=-=-=- listen thread -=-=-=-=- */
294
295	/**
296	* Receive thread loop.
297	*
298	* @returns 0 on success.
299	* @param ThreadSelf Thread handle to this thread.
300	* @param pvUser User argument.
301	*/
302	static DECLCALLBACK(int) drvNamedPipeListenLoop(RTTHREAD ThreadSelf, void *pvUser)
303	{
304	PDRVNAMEDPIPE pThis = (PDRVNAMEDPIPE)pvUser;
305	int rc = VINF_SUCCESS;
306	#ifdef RT_OS_WINDOWS
307	HANDLE NamedPipe = pThis->NamedPipe;
308	HANDLE hEvent = CreateEvent(NULL, TRUE, FALSE, 0);
309	#endif
310
311	while (RT_LIKELY(!pThis->fShutdown))
312	{
313	#ifdef RT_OS_WINDOWS
314	OVERLAPPED overlapped;
315
316	memset(&overlapped, 0, sizeof(overlapped));
317	overlapped.hEvent = hEvent;
318
319	BOOL fConnected = ConnectNamedPipe(NamedPipe, &overlapped);
320	if ( !fConnected
321	&& !pThis->fShutdown)
322	{
323	DWORD hrc = GetLastError();
324
325	if (hrc == ERROR_IO_PENDING)
326	{
327	DWORD dummy;
328
329	hrc = 0;
330	if (GetOverlappedResult(pThis->NamedPipe, &overlapped, &dummy, TRUE) == FALSE)
331	hrc = GetLastError();
332
333	}
334
335	if (pThis->fShutdown)
336	break;
337
338	if (hrc == ERROR_PIPE_CONNECTED)
339	{
340	RTSemEventMultiWait(pThis->ListenSem, 250);
341	}
342	else if (hrc != ERROR_SUCCESS)
343	{
344	rc = RTErrConvertFromWin32(hrc);
345	LogRel(("NamedPipe%d: ConnectNamedPipe failed, rc=%Rrc\n", pThis->pDrvIns->iInstance, rc));
346	break;
347	}
348	}
349	#else /* !RT_OS_WINDOWS */
350	if (listen(pThis->LocalSocketServer, 0) == -1)
351	{
352	rc = RTErrConvertFromErrno(errno);
353	LogRel(("NamedPipe%d: listen failed, rc=%Rrc\n", pThis->pDrvIns->iInstance, rc));
354	break;
355	}
356	int s = accept(pThis->LocalSocketServer, NULL, NULL);
357	if (s == -1)
358	{
359	rc = RTErrConvertFromErrno(errno);
360	LogRel(("NamedPipe%d: accept failed, rc=%Rrc\n", pThis->pDrvIns->iInstance, rc));
361	break;
362	}
363	if (pThis->LocalSocket != -1)
364	{
365	LogRel(("NamedPipe%d: only single connection supported\n", pThis->pDrvIns->iInstance));
366	close(s);
367	}
368	else
369	pThis->LocalSocket = s;
370
371	#endif /* !RT_OS_WINDOWS */
372	}
373
374	#ifdef RT_OS_WINDOWS
375	CloseHandle(hEvent);
376	#endif
377	return VINF_SUCCESS;
378	}
379
380	/* -=-=-=-=- PDMDRVREG -=-=-=-=- */
381
382	/**
383	* Common worker for drvNamedPipePowerOff and drvNamedPipeDestructor.
384	*
385	* @param pThis The instance data.
386	*/
387	static void drvNamedPipeShutdownListener(PDRVNAMEDPIPE pThis)
388	{
389	/*
390	* Signal shutdown of the listener thread.
391	*/
392	pThis->fShutdown = true;
393	#ifdef RT_OS_WINDOWS
394	if ( pThis->fIsServer
395	&& pThis->NamedPipe != INVALID_HANDLE_VALUE)
396	{
397	FlushFileBuffers(pThis->NamedPipe);
398	DisconnectNamedPipe(pThis->NamedPipe);
399
400	BOOL fRc = CloseHandle(pThis->NamedPipe);
401	Assert(fRc); NOREF(fRc);
402	pThis->NamedPipe = INVALID_HANDLE_VALUE;
403
404	/* Wake up listen thread */
405	if (pThis->ListenSem != NIL_RTSEMEVENT)
406	RTSemEventMultiSignal(pThis->ListenSem);
407	}
408	#else
409	if ( pThis->fIsServer
410	&& pThis->LocalSocketServer != -1)
411	{
412	int rc = shutdown(pThis->LocalSocketServer, SHUT_RDWR);
413	AssertRC(rc == 0); NOREF(rc);
414
415	rc = close(pThis->LocalSocketServer);
416	AssertRC(rc == 0);
417	pThis->LocalSocketServer = -1;
418	}
419	#endif
420	}
421
422
423	/**
424	* Power off a named pipe stream driver instance.
425	*
426	* This does most of the destruction work, to avoid ordering dependencies.
427	*
428	* @param pDrvIns The driver instance data.
429	*/
430	static DECLCALLBACK(void) drvNamedPipePowerOff(PPDMDRVINS pDrvIns)
431	{
432	PDRVNAMEDPIPE pThis = PDMINS_2_DATA(pDrvIns, PDRVNAMEDPIPE);
433	LogFlow(("%s: %s\n", __FUNCTION__, pThis->pszLocation));
434
435	drvNamedPipeShutdownListener(pThis);
436	}
437
438
439	/**
440	* Destruct a named pipe stream driver instance.
441	*
442	* Most VM resources are freed by the VM. This callback is provided so that
443	* any non-VM resources can be freed correctly.
444	*
445	* @param pDrvIns The driver instance data.
446	*/
447	static DECLCALLBACK(void) drvNamedPipeDestruct(PPDMDRVINS pDrvIns)
448	{
449	PDRVNAMEDPIPE pThis = PDMINS_2_DATA(pDrvIns, PDRVNAMEDPIPE);
450	LogFlow(("%s: %s\n", __FUNCTION__, pThis->pszLocation));
451	PDMDRV_CHECK_VERSIONS_RETURN_VOID(pDrvIns);
452
453	drvNamedPipeShutdownListener(pThis);
454
455	/*
456	* While the thread exits, clean up as much as we can.
457	*/
458	#ifdef RT_OS_WINDOWS
459	if (pThis->NamedPipe != INVALID_HANDLE_VALUE)
460	{
461	CloseHandle(pThis->NamedPipe);
462	pThis->NamedPipe = INVALID_HANDLE_VALUE;
463	}
464	if (pThis->OverlappedRead.hEvent != NULL)
465	{
466	CloseHandle(pThis->OverlappedRead.hEvent);
467	pThis->OverlappedRead.hEvent = NULL;
468	}
469	if (pThis->OverlappedWrite.hEvent != NULL)
470	{
471	CloseHandle(pThis->OverlappedWrite.hEvent);
472	pThis->OverlappedWrite.hEvent = NULL;
473	}
474	#else /* !RT_OS_WINDOWS */
475	Assert(pThis->LocalSocketServer == -1);
476	if (pThis->LocalSocket != -1)
477	{
478	int rc = shutdown(pThis->LocalSocket, SHUT_RDWR);
479	AssertRC(rc == 0); NOREF(rc);
480
481	rc = close(pThis->LocalSocket);
482	Assert(rc == 0);
483	pThis->LocalSocket = -1;
484	}
485	if ( pThis->fIsServer
486	&& pThis->pszLocation)
487	RTFileDelete(pThis->pszLocation);
488	#endif /* !RT_OS_WINDOWS */
489
490	MMR3HeapFree(pThis->pszLocation);
491	pThis->pszLocation = NULL;
492
493	/*
494	* Wait for the thread.
495	*/
496	if (pThis->ListenThread != NIL_RTTHREAD)
497	{
498	int rc = RTThreadWait(pThis->ListenThread, 30000, NULL);
499	if (RT_SUCCESS(rc))
500	pThis->ListenThread = NIL_RTTHREAD;
501	else
502	LogRel(("NamedPipe%d: listen thread did not terminate (%Rrc)\n", pDrvIns->iInstance, rc));
503	}
504
505	/*
506	* The last bits of cleanup.
507	*/
508	#ifdef RT_OS_WINDOWS
509	if (pThis->ListenSem != NIL_RTSEMEVENT)
510	{
511	RTSemEventMultiDestroy(pThis->ListenSem);
512	pThis->ListenSem = NIL_RTSEMEVENT;
513	}
514	#endif
515	}
516
517
518	/**
519	* Construct a named pipe stream driver instance.
520	*
521	* @copydoc FNPDMDRVCONSTRUCT
522	*/
523	static DECLCALLBACK(int) drvNamedPipeConstruct(PPDMDRVINS pDrvIns, PCFGMNODE pCfg, uint32_t fFlags)
524	{
525	PDRVNAMEDPIPE pThis = PDMINS_2_DATA(pDrvIns, PDRVNAMEDPIPE);
526	PDMDRV_CHECK_VERSIONS_RETURN(pDrvIns);
527
528	/*
529	* Init the static parts.
530	*/
531	pThis->pDrvIns = pDrvIns;
532	pThis->pszLocation = NULL;
533	pThis->fIsServer = false;
534	#ifdef RT_OS_WINDOWS
535	pThis->NamedPipe = INVALID_HANDLE_VALUE;
536	pThis->ListenSem = NIL_RTSEMEVENTMULTI;
537	pThis->OverlappedWrite.hEvent = NULL;
538	pThis->OverlappedRead.hEvent = NULL;
539	#else /* !RT_OS_WINDOWS */
540	pThis->LocalSocketServer = -1;
541	pThis->LocalSocket = -1;
542	#endif /* !RT_OS_WINDOWS */
543	pThis->ListenThread = NIL_RTTHREAD;
544	pThis->fShutdown = false;
545	/* IBase */
546	pDrvIns->IBase.pfnQueryInterface = drvNamedPipeQueryInterface;
547	/* IStream */
548	pThis->IStream.pfnRead = drvNamedPipeRead;
549	pThis->IStream.pfnWrite = drvNamedPipeWrite;
550
551	/*
552	* Validate and read the configuration.
553	*/
554	PDMDRV_VALIDATE_CONFIG_RETURN(pDrvIns, "Location\|IsServer", "");
555
556	int rc = CFGMR3QueryStringAlloc(pCfg, "Location", &pThis->pszLocation);
557	if (RT_FAILURE(rc))
558	return PDMDrvHlpVMSetError(pDrvIns, rc, RT_SRC_POS,
559	N_("Configuration error: querying \"Location\" resulted in %Rrc"), rc);
560	rc = CFGMR3QueryBool(pCfg, "IsServer", &pThis->fIsServer);
561	if (RT_FAILURE(rc))
562	return PDMDrvHlpVMSetError(pDrvIns, rc, RT_SRC_POS,
563	N_("Configuration error: querying \"IsServer\" resulted in %Rrc"), rc);
564
565	/*
566	* Create/Open the pipe.
567	*/
568	#ifdef RT_OS_WINDOWS
569	if (pThis->fIsServer)
570	{
571	pThis->NamedPipe = CreateNamedPipe(pThis->pszLocation,
572	PIPE_ACCESS_DUPLEX \| FILE_FLAG_OVERLAPPED,
573	PIPE_TYPE_BYTE \| PIPE_READMODE_BYTE \| PIPE_WAIT,
574	1, /nMaxInstances/
575	32, /nOutBufferSize/
576	32, /nOutBufferSize/
577	10000, /nDefaultTimeOut/
578	NULL); /* lpSecurityAttributes*/
579	if (pThis->NamedPipe == INVALID_HANDLE_VALUE)
580	{
581	rc = RTErrConvertFromWin32(GetLastError());
582	LogRel(("NamedPipe%d: CreateNamedPipe failed rc=%Rrc\n", pThis->pDrvIns->iInstance));
583	return PDMDrvHlpVMSetError(pDrvIns, rc, RT_SRC_POS, N_("NamedPipe#%d failed to create named pipe %s"),
584	pDrvIns->iInstance, pThis->pszLocation);
585	}
586
587	rc = RTSemEventMultiCreate(&pThis->ListenSem);
588	AssertRCReturn(rc, rc);
589
590	rc = RTThreadCreate(&pThis->ListenThread, drvNamedPipeListenLoop, (void *)pThis, 0,
591	RTTHREADTYPE_IO, RTTHREADFLAGS_WAITABLE, "SerPipe");
592	if (RT_FAILURE(rc))
593	return PDMDrvHlpVMSetError(pDrvIns, rc, RT_SRC_POS, N_("NamedPipe#%d failed to create listening thread"),
594	pDrvIns->iInstance);
595
596	}
597	else
598	{
599	/* Connect to the named pipe. */
600	pThis->NamedPipe = CreateFile(pThis->pszLocation, GENERIC_READ \| GENERIC_WRITE, 0, NULL,
601	OPEN_EXISTING, FILE_FLAG_OVERLAPPED, NULL);
602	if (pThis->NamedPipe == INVALID_HANDLE_VALUE)
603	{
604	rc = RTErrConvertFromWin32(GetLastError());
605	LogRel(("NamedPipe%d: CreateFile failed rc=%Rrc\n", pThis->pDrvIns->iInstance));
606	return PDMDrvHlpVMSetError(pDrvIns, rc, RT_SRC_POS, N_("NamedPipe#%d failed to connect to named pipe %s"),
607	pDrvIns->iInstance, pThis->pszLocation);
608	}
609	}
610
611	memset(&pThis->OverlappedWrite, 0, sizeof(pThis->OverlappedWrite));
612	pThis->OverlappedWrite.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
613	AssertReturn(pThis->OverlappedWrite.hEvent != NULL, VERR_OUT_OF_RESOURCES);
614
615	memset(&pThis->OverlappedRead, 0, sizeof(pThis->OverlappedRead));
616	pThis->OverlappedRead.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
617	AssertReturn(pThis->OverlappedRead.hEvent != NULL, VERR_OUT_OF_RESOURCES);
618
619	#else /* !RT_OS_WINDOWS */
620	int s = socket(PF_UNIX, SOCK_STREAM, 0);
621	if (s == -1)
622	return PDMDrvHlpVMSetError(pDrvIns, RTErrConvertFromErrno(errno), RT_SRC_POS,
623	N_("NamedPipe#%d failed to create local socket"), pDrvIns->iInstance);
624
625	struct sockaddr_un addr;
626	memset(&addr, 0, sizeof(addr));
627	addr.sun_family = AF_UNIX;
628	strncpy(addr.sun_path, pThis->pszLocation, sizeof(addr.sun_path) - 1);
629
630	if (pThis->fIsServer)
631	{
632	/* Bind address to the local socket. */
633	pThis->LocalSocketServer = s;
634	RTFileDelete(pThis->pszLocation);
635	if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) == -1)
636	return PDMDrvHlpVMSetError(pDrvIns, RTErrConvertFromErrno(errno), RT_SRC_POS,
637	N_("NamedPipe#%d failed to bind to local socket %s"),
638	pDrvIns->iInstance, pThis->pszLocation);
639	rc = RTThreadCreate(&pThis->ListenThread, drvNamedPipeListenLoop, (void *)pThis, 0,
640	RTTHREADTYPE_IO, RTTHREADFLAGS_WAITABLE, "SerPipe");
641	if (RT_FAILURE(rc))
642	return PDMDrvHlpVMSetError(pDrvIns, rc, RT_SRC_POS,
643	N_("NamedPipe#%d failed to create listening thread"), pDrvIns->iInstance);
644	}
645	else
646	{
647	/* Connect to the local socket. */
648	pThis->LocalSocket = s;
649	if (connect(s, (struct sockaddr *)&addr, sizeof(addr)) == -1)
650	return PDMDrvHlpVMSetError(pDrvIns, RTErrConvertFromErrno(errno), RT_SRC_POS,
651	N_("NamedPipe#%d failed to connect to local socket %s"),
652	pDrvIns->iInstance, pThis->pszLocation);
653	}
654	#endif /* !RT_OS_WINDOWS */
655
656	LogRel(("NamedPipe: location %s, %s\n", pThis->pszLocation, pThis->fIsServer ? "server" : "client"));
657	return VINF_SUCCESS;
658	}
659
660
661	/**
662	* Named pipe driver registration record.
663	*/
664	const PDMDRVREG g_DrvNamedPipe =
665	{
666	/* u32Version */
667	PDM_DRVREG_VERSION,
668	/* szName */
669	"NamedPipe",
670	/* szRCMod */
671	"",
672	/* szR0Mod */
673	"",
674	/* pszDescription */
675	"Named Pipe stream driver.",
676	/* fFlags */
677	PDM_DRVREG_FLAGS_HOST_BITS_DEFAULT,
678	/* fClass. */
679	PDM_DRVREG_CLASS_STREAM,
680	/* cMaxInstances */
681	~0U,
682	/* cbInstance */
683	sizeof(DRVNAMEDPIPE),
684	/* pfnConstruct */
685	drvNamedPipeConstruct,
686	/* pfnDestruct */
687	drvNamedPipeDestruct,
688	/* pfnRelocate */
689	NULL,
690	/* pfnIOCtl */
691	NULL,
692	/* pfnPowerOn */
693	NULL,
694	/* pfnReset */
695	NULL,
696	/* pfnSuspend */
697	NULL,
698	/* pfnResume */
699	NULL,
700	/* pfnAttach */
701	NULL,
702	/* pfnDetach */
703	NULL,
704	/* pfnPowerOff */
705	drvNamedPipePowerOff,
706	/* pfnSoftReset */
707	NULL,
708	/* u32EndVersion */
709	PDM_DRVREG_VERSION
710	};
711

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source: vbox/trunk/src/VBox/Devices/Serial/DrvNamedPipe.cpp@ 49882

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