DrvTAPWin.cpp@ 14275

Last change on this file since 14275 was 13840, checked in by vboxsync, 16 years ago
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1	/** @file
2	*
3	* VBox network devices:
4	* Linux/Win32 TUN network transport driver
5	*/
6
7	/*
8	* Copyright (C) 2006-2007 Sun Microsystems, Inc.
9	*
10	* This file is part of VirtualBox Open Source Edition (OSE), as
11	* available from http://www.virtualbox.org. This file is free software;
12	* you can redistribute it and/or modify it under the terms of the GNU
13	* General Public License (GPL) as published by the Free Software
14	* Foundation, in version 2 as it comes in the "COPYING" file of the
15	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
16	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
17	*
18	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
19	* Clara, CA 95054 USA or visit http://www.sun.com if you need
20	* additional information or have any questions.
21	*/
22
23
24	/*******************************************************************************
25	* Header Files *
26	*******************************************************************************/
27	#define LOG_GROUP LOG_GROUP_DRV_TUN
28	#include <VBox/pdmdrv.h>
29	#include <VBox/stam.h>
30
31	#include <VBox/log.h>
32	#include <iprt/assert.h>
33	#include <iprt/file.h>
34	#include <iprt/string.h>
35	#include <iprt/thread.h>
36	#include <iprt/asm.h>
37	#include <iprt/semaphore.h>
38
39	#include <windows.h>
40	#include <VBox/tapwin32.h>
41
42	#include "Builtins.h"
43
44	/*******************************************************************************
45	* Structures and Typedefs *
46	*******************************************************************************/
47	/**
48	* Block driver instance data.
49	*/
50	typedef struct
51	{
52	/** The network interface. */
53	PDMINETWORKCONNECTOR INetworkConnector;
54	/** The network interface. */
55	PPDMINETWORKPORT pPort;
56	/** Pointer to the driver instance. */
57	PPDMDRVINS pDrvIns;
58	/** TAP device file handle. */
59	HANDLE hFile;
60
61	HANDLE hEventWrite;
62	HANDLE hEventRead;
63
64	OVERLAPPED overlappedRead;
65	DWORD dwNumberOfBytesRead;
66	uint8_t readBuffer[16384];
67
68	TAP_VERSION tapVersion;
69
70	/** The thread handle. NIL_RTTHREAD if no thread. */
71	PPDMTHREAD pThread;
72	/** The event semaphore the thread is waiting on. */
73	HANDLE hHaltAsyncEventSem;
74
75	#ifdef DEBUG
76	DWORD dwLastReadTime;
77	DWORD dwLastWriteTime;
78	#endif
79
80	#ifdef VBOX_WITH_STATISTICS
81	/** Number of sent packets. */
82	STAMCOUNTER StatPktSent;
83	/** Number of sent bytes. */
84	STAMCOUNTER StatPktSentBytes;
85	/** Number of received packets. */
86	STAMCOUNTER StatPktRecv;
87	/** Number of received bytes. */
88	STAMCOUNTER StatPktRecvBytes;
89	/** Profiling packet transmit runs. */
90	STAMPROFILEADV StatTransmit;
91	/** Profiling packet receive runs. */
92	STAMPROFILEADV StatReceive;
93	STAMPROFILE StatRecvOverflows;
94	#endif /* VBOX_WITH_STATISTICS */
95	} DRVTAP, *PDRVTAP;
96
97	/** Converts a pointer to TUN::INetworkConnector to a PRDVTUN. */
98	#define PDMINETWORKCONNECTOR_2_DRVTAP(pInterface) ( (PDRVTAP)((uintptr_t)pInterface - RT_OFFSETOF(DRVTAP, INetworkConnector)) )
99
100	/**
101	* Send data to the network.
102	*
103	* @returns VBox status code.
104	* @param pInterface Pointer to the interface structure containing the called function pointer.
105	* @param pvBuf Data to send.
106	* @param cb Number of bytes to send.
107	* @thread EMT
108	*/
109	static DECLCALLBACK(int) drvTAPW32Send(PPDMINETWORKCONNECTOR pInterface, const void *pvBuf, size_t cb)
110	{
111	OVERLAPPED overlapped;
112	DWORD cbBytesWritten;
113	int rc;
114	PDRVTAP pThis = PDMINETWORKCONNECTOR_2_DRVTAP(pInterface);
115
116	Log2(("drvTAPW32Send%d: pvBuf=%p cb=%#x\n"
117	"%.*Rhxd\n", pThis->pDrvIns->iInstance, pvBuf, cb, cb, pvBuf));
118
119	#ifdef DEBUG
120	pThis->dwLastReadTime = timeGetTime();
121	Log(("drvTAPW32Send %d bytes at %08x - delta %x\n", cb, pThis->dwLastReadTime, pThis->dwLastReadTime - pThis->dwLastWriteTime));
122	#endif
123
124	STAM_COUNTER_INC(&pThis->StatPktSent);
125	STAM_COUNTER_ADD(&pThis->StatPktSentBytes, cb);
126	STAM_PROFILE_ADV_START(&pThis->StatTransmit, a);
127
128	memset(&overlapped, 0, sizeof(overlapped));
129	overlapped.hEvent = pThis->hEventWrite;
130
131	rc = VINF_SUCCESS;
132	if (WriteFile(pThis->hFile, pvBuf, cb, &cbBytesWritten, &overlapped) == FALSE)
133	{
134	if (GetLastError() == ERROR_IO_PENDING)
135	{
136	Log(("drvTAPW32Send: IO pending!!\n"));
137	rc = WaitForSingleObject(overlapped.hEvent, INFINITE);
138	AssertMsg(rc == WAIT_OBJECT_0, ("WaitForSingleObject failed with %x\n", rc));
139	rc = VINF_SUCCESS;
140	}
141	else
142	{
143	AssertMsgFailed(("WriteFile failed with %d\n", GetLastError()));
144	rc = RTErrConvertFromWin32(GetLastError());
145	}
146	}
147	STAM_PROFILE_ADV_STOP(&pThis->StatTransmit, a);
148	AssertRC(rc);
149	return rc;
150	}
151
152
153	/**
154	* Set promiscuous mode.
155	*
156	* This is called when the promiscuous mode is set. This means that there doesn't have
157	* to be a mode change when it's called.
158	*
159	* @param pInterface Pointer to the interface structure containing the called function pointer.
160	* @param fPromiscuous Set if the adaptor is now in promiscuous mode. Clear if it is not.
161	* @thread EMT
162	*/
163	static DECLCALLBACK(void) drvTAPW32SetPromiscuousMode(PPDMINETWORKCONNECTOR pInterface, bool fPromiscuous)
164	{
165	LogFlow(("drvTAPW32SetPromiscuousMode: fPromiscuous=%d\n", fPromiscuous));
166	/* nothing to do */
167	}
168
169
170	/**
171	* Notification on link status changes.
172	*
173	* @param pInterface Pointer to the interface structure containing the called function pointer.
174	* @param enmLinkState The new link state.
175	* @thread EMT
176	*/
177	static DECLCALLBACK(void) drvTAPW32NotifyLinkChanged(PPDMINETWORKCONNECTOR pInterface, PDMNETWORKLINKSTATE enmLinkState)
178	{
179	LogFlow(("drvNATW32NotifyLinkChanged: enmLinkState=%d\n", enmLinkState));
180	/** @todo take action on link down and up. Stop the polling and such like. */
181	}
182
183
184	/**
185	* Async I/O thread for an interface.
186	*/
187	static DECLCALLBACK(int) drvTAPW32AsyncIoThread(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
188	{
189	PDRVTAP pThis = PDMINS_2_DATA(pDrvIns, PDRVTAP);
190	HANDLE haWait[2];
191	DWORD rc = ERROR_SUCCESS, dwNumberOfBytesTransferred;
192
193	if (pThread->enmState == PDMTHREADSTATE_INITIALIZING)
194	return VINF_SUCCESS;
195
196	Assert(pThis);
197	haWait[0] = pThis->hEventRead;
198	haWait[1] = pThis->hHaltAsyncEventSem;
199
200	while(1)
201	{
202	BOOL bRet;
203
204	memset(&pThis->overlappedRead, 0, sizeof(pThis->overlappedRead));
205	pThis->overlappedRead.hEvent = pThis->hEventRead;
206	bRet = ReadFile(pThis->hFile, pThis->readBuffer, sizeof(pThis->readBuffer),
207	&dwNumberOfBytesTransferred, &pThis->overlappedRead);
208	if (bRet == FALSE)
209	{
210	rc = GetLastError();
211	AssertMsg(rc == ERROR_IO_PENDING \|\| rc == ERROR_MORE_DATA, ("ReadFile failed with rc=%d\n", rc));
212	if (rc != ERROR_IO_PENDING && rc != ERROR_MORE_DATA)
213	break;
214
215	rc = WaitForMultipleObjects(2, &haWait[0], FALSE, INFINITE);
216	AssertMsg(rc == WAIT_OBJECT_0 \|\| rc == WAIT_OBJECT_0+1, ("WaitForSingleObject failed with %x\n", rc));
217
218	if (rc != WAIT_OBJECT_0)
219	break; /* asked to quit or fatal error. */
220
221	rc = GetOverlappedResult(pThis->hFile, &pThis->overlappedRead, &dwNumberOfBytesTransferred, FALSE);
222	Assert(rc == TRUE);
223
224	/* If GetOverlappedResult() returned with TRUE, the operation was finished successfully */
225	}
226
227	/*
228	* Wait for the device to have some room. A return code != VINF_SUCCESS
229	* means that we were woken up during a VM state transition. Drop the
230	* current packet and wait for the next one.
231	*/
232	rc = pThis->pPort->pfnWaitReceiveAvail(pThis->pPort, RT_INDEFINITE_WAIT);
233	if (RT_FAILURE(rc))
234	continue;
235
236	STAM_COUNTER_INC(&pThis->StatPktRecv);
237	STAM_COUNTER_ADD(&pThis->StatPktRecvBytes, dwNumberOfBytesTransferred);
238	#ifdef DEBUG
239	pThis->dwLastWriteTime = timeGetTime();
240	Log(("drvTAPW32AsyncIo %d bytes at %08x - delta %x\n", dwNumberOfBytesTransferred,
241	pThis->dwLastWriteTime, pThis->dwLastWriteTime - pThis->dwLastReadTime));
242	#endif
243	rc = pThis->pPort->pfnReceive(pThis->pPort, pThis->readBuffer, dwNumberOfBytesTransferred);
244	AssertRC(rc);
245	}
246
247	SetEvent(pThis->hHaltAsyncEventSem);
248	Log(("drvTAPW32AsyncIo: exit thread!!\n"));
249	return VINF_SUCCESS;
250	}
251
252
253	/**
254	* Unblock the send thread so it can respond to a state change.
255	*
256	* @returns VBox status code.
257	* @param pDevIns The pcnet device instance.
258	* @param pThread The send thread.
259	*/
260	static DECLCALLBACK(int) drvTAPW32AsyncIoWakeup(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
261	{
262	PDRVTAP pThis = PDMINS_2_DATA(pDrvIns, PDRVTAP);
263
264	/** @todo this isn't a safe method to notify the async thread; it might be using the instance
265	* data after we've been destroyed; could wait for it to terminate, but that's not
266	* without risks either.
267	*/
268	SetEvent(pThis->hHaltAsyncEventSem);
269
270	/* Yield or else our async thread will never acquire the event semaphore */
271	RTThreadSleep(16);
272	/* Wait for the async thread to quit; up to half a second */
273	WaitForSingleObject(pThis->hHaltAsyncEventSem, 500);
274
275	return VINF_SUCCESS;
276	}
277
278	/**
279	* Queries an interface to the driver.
280	*
281	* @returns Pointer to interface.
282	* @returns NULL if the interface was not supported by the driver.
283	* @param pInterface Pointer to this interface structure.
284	* @param enmInterface The requested interface identification.
285	* @thread Any thread.
286	*/
287	static DECLCALLBACK(void *) drvTAPW32QueryInterface(PPDMIBASE pInterface, PDMINTERFACE enmInterface)
288	{
289	PPDMDRVINS pDrvIns = PDMIBASE_2_PDMDRV(pInterface);
290	PDRVTAP pThis = PDMINS_2_DATA(pDrvIns, PDRVTAP);
291	switch (enmInterface)
292	{
293	case PDMINTERFACE_BASE:
294	return &pDrvIns->IBase;
295	case PDMINTERFACE_NETWORK_CONNECTOR:
296	return &pThis->INetworkConnector;
297	default:
298	return NULL;
299	}
300	}
301
302
303	/**
304	* Destruct a driver instance.
305	*
306	* Most VM resources are freed by the VM. This callback is provided so that any non-VM
307	* resources can be freed correctly.
308	*
309	* @param pDrvIns The driver instance data.
310	*/
311	static DECLCALLBACK(void) drvTAPW32Destruct(PPDMDRVINS pDrvIns)
312	{
313	PDRVTAP pThis = PDMINS_2_DATA(pDrvIns, PDRVTAP);
314	TAP_MEDIASTATUS mediastatus;
315	DWORD dwLength;
316
317	LogFlow(("drvTAPW32Destruct\n"));
318
319	mediastatus.fConnect = FALSE;
320	BOOL ret = DeviceIoControl(pThis->hFile, TAP_IOCTL_SET_MEDIA_STATUS,
321	&mediastatus, sizeof(mediastatus), NULL, 0, &dwLength, NULL);
322	Assert(ret);
323
324	CloseHandle(pThis->hEventWrite);
325	CancelIo(pThis->hFile);
326	CloseHandle(pThis->hFile);
327	}
328
329
330	/**
331	* Construct a TUN network transport driver instance.
332	*
333	* @returns VBox status.
334	* @param pDrvIns The driver instance data.
335	* If the registration structure is needed, pDrvIns->pDrvReg points to it.
336	* @param pCfgHandle Configuration node handle for the driver. Use this to obtain the configuration
337	* of the driver instance. It's also found in pDrvIns->pCfgHandle, but like
338	* iInstance it's expected to be used a bit in this function.
339	*/
340	static DECLCALLBACK(int) drvTAPW32Construct(PPDMDRVINS pDrvIns, PCFGMNODE pCfgHandle)
341	{
342	PDRVTAP pThis = PDMINS_2_DATA(pDrvIns, PDRVTAP);
343
344	/*
345	* Init the static parts.
346	*/
347	pThis->pDrvIns = pDrvIns;
348	pThis->hFile = INVALID_HANDLE_VALUE;
349	/* IBase */
350	pDrvIns->IBase.pfnQueryInterface = drvTAPW32QueryInterface;
351	/* INetwork */
352	pThis->INetworkConnector.pfnSend = drvTAPW32Send;
353	pThis->INetworkConnector.pfnSetPromiscuousMode = drvTAPW32SetPromiscuousMode;
354	pThis->INetworkConnector.pfnNotifyLinkChanged = drvTAPW32NotifyLinkChanged;
355
356	/*
357	* Validate the config.
358	*/
359	if (!CFGMR3AreValuesValid(pCfgHandle, "Device\0HostInterfaceName\0GUID\0"))
360	return VERR_PDM_DRVINS_UNKNOWN_CFG_VALUES;
361
362	/*
363	* Check that no-one is attached to us.
364	*/
365	int rc = pDrvIns->pDrvHlp->pfnAttach(pDrvIns, NULL);
366	if (rc != VERR_PDM_NO_ATTACHED_DRIVER)
367	return PDMDRV_SET_ERROR(pDrvIns, VERR_PDM_DRVINS_NO_ATTACH,
368	N_("Configuration error: Cannot attach drivers to the TUN driver"));
369
370	/*
371	* Query the network port interface.
372	*/
373	pThis->pPort = (PPDMINETWORKPORT)pDrvIns->pUpBase->pfnQueryInterface(pDrvIns->pUpBase, PDMINTERFACE_NETWORK_PORT);
374	if (!pThis->pPort)
375	return PDMDRV_SET_ERROR(pDrvIns, VERR_PDM_MISSING_INTERFACE_ABOVE,
376	N_("Configuration error: the above device/driver didn't export the network port interface"));
377
378	/*
379	* Read the configuration.
380	*/
381	char *pszHostDriver = NULL;
382	rc = CFGMR3QueryStringAlloc(pCfgHandle, "HostInterfaceName", &pszHostDriver);
383	if (RT_FAILURE(rc))
384	return PDMDRV_SET_ERROR(pDrvIns, rc,
385	N_("Configuration error: query for \"HostInterfaceName\" failed"));
386
387	TAP_MEDIASTATUS mediastatus;
388	DWORD length;
389	char szFullDriverName[256];
390	char szDriverGUID[256] = {0};
391
392	rc = CFGMR3QueryBytes(pCfgHandle, "GUID", szDriverGUID, sizeof(szDriverGUID));
393	if (RT_FAILURE(rc))
394	return PDMDRV_SET_ERROR(pDrvIns, VERR_PDM_DEVINS_UNKNOWN_CFG_VALUES,
395	N_("Configuration error: could not query GUID"));
396
397	RTStrPrintfEx(NULL, NULL, szFullDriverName, sizeof(szFullDriverName), "\\\\.\\Global\\%s.tap", szDriverGUID);
398
399	pThis->hFile = CreateFile(szFullDriverName, GENERIC_READ \| GENERIC_WRITE, 0, NULL, OPEN_EXISTING,
400	FILE_ATTRIBUTE_SYSTEM \| FILE_FLAG_OVERLAPPED, 0);
401
402	if (pThis->hFile == INVALID_HANDLE_VALUE)
403	{
404	rc = GetLastError();
405
406	AssertMsgFailed(("Configuration error: TAP device name %s is not valid! (rc=%d)\n", szFullDriverName, rc));
407	if (rc == ERROR_SHARING_VIOLATION)
408	return VERR_PDM_HIF_SHARING_VIOLATION;
409
410	return PDMDRV_SET_ERROR(pDrvIns, VERR_PDM_HIF_OPEN_FAILED,
411	N_("Failed to open Host Interface Networking device driver"));
412	}
413
414	BOOL ret = DeviceIoControl(pThis->hFile, TAP_IOCTL_GET_VERSION, &pThis->tapVersion, sizeof (pThis->tapVersion),
415	&pThis->tapVersion, sizeof(pThis->tapVersion), &length, NULL);
416	if (ret == FALSE)
417	{
418	CloseHandle(pThis->hFile);
419	return PDMDRV_SET_ERROR(pDrvIns, VERR_PDM_HIF_INVALID_VERSION,
420	N_("Failed to get the Host Interface Networking device driver version"));;
421	}
422	LogRel(("TAP version %d.%d\n", pThis->tapVersion.major, pThis->tapVersion.minor));
423
424	/* Must be at least version 8.1 */
425	if ( pThis->tapVersion.major != 8
426	\|\| pThis->tapVersion.minor < 1)
427	{
428	CloseHandle(pThis->hFile);
429	return PDMDRV_SET_ERROR(pDrvIns, VERR_PDM_HIF_INVALID_VERSION,
430	N_("Invalid Host Interface Networking device driver version"));;
431	}
432
433	mediastatus.fConnect = TRUE;
434	ret = DeviceIoControl(pThis->hFile, TAP_IOCTL_SET_MEDIA_STATUS, &mediastatus, sizeof(mediastatus), NULL, 0, &length, NULL);
435	if (ret == FALSE)
436	{
437	CloseHandle(pThis->hFile);
438	return VERR_PDM_DEVINS_UNKNOWN_CFG_VALUES;
439	}
440
441	if (pszHostDriver)
442	MMR3HeapFree(pszHostDriver);
443
444	pThis->hEventWrite = CreateEvent(NULL, FALSE, FALSE, NULL);
445	pThis->hEventRead = CreateEvent(NULL, FALSE, FALSE, NULL);
446	memset(&pThis->overlappedRead, 0, sizeof(pThis->overlappedRead));
447
448	pThis->hHaltAsyncEventSem = CreateEvent(NULL, FALSE, FALSE, NULL);
449	Assert(pThis->hHaltAsyncEventSem != NULL);
450
451	/* Create asynchronous thread */
452	rc = PDMDrvHlpPDMThreadCreate(pDrvIns, &pThis->pThread, pThis, drvTAPW32AsyncIoThread, drvTAPW32AsyncIoWakeup, 128 * _1K, RTTHREADTYPE_IO, "TAP");
453	AssertRCReturn(rc, rc);
454
455	#ifdef VBOX_WITH_STATISTICS
456	/*
457	* Statistics.
458	*/
459	PDMDrvHlpSTAMRegisterF(pDrvIns, &pThis->StatPktSent, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of sent packets.", "/Drivers/TAP%d/Packets/Sent", pDrvIns->iInstance);
460	PDMDrvHlpSTAMRegisterF(pDrvIns, &pThis->StatPktSentBytes, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_BYTES, "Number of sent bytes.", "/Drivers/TAP%d/Bytes/Sent", pDrvIns->iInstance);
461	PDMDrvHlpSTAMRegisterF(pDrvIns, &pThis->StatPktRecv, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of received packets.", "/Drivers/TAP%d/Packets/Received", pDrvIns->iInstance);
462	PDMDrvHlpSTAMRegisterF(pDrvIns, &pThis->StatPktRecvBytes, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_BYTES, "Number of received bytes.", "/Drivers/TAP%d/Bytes/Received", pDrvIns->iInstance);
463	PDMDrvHlpSTAMRegisterF(pDrvIns, &pThis->StatTransmit, STAMTYPE_PROFILE, STAMVISIBILITY_ALWAYS, STAMUNIT_TICKS_PER_CALL, "Profiling packet transmit runs.", "/Drivers/TAP%d/Transmit", pDrvIns->iInstance);
464	PDMDrvHlpSTAMRegisterF(pDrvIns, &pThis->StatReceive, STAMTYPE_PROFILE, STAMVISIBILITY_ALWAYS, STAMUNIT_TICKS_PER_CALL, "Profiling packet receive runs.", "/Drivers/TAP%d/Receive", pDrvIns->iInstance);
465	PDMDrvHlpSTAMRegisterF(pDrvIns, &pThis->StatRecvOverflows,STAMTYPE_PROFILE, STAMVISIBILITY_ALWAYS, STAMUNIT_TICKS_PER_OCCURENCE, "Profiling packet receive overflows.", "/Drivers/TAP%d/RecvOverflows", pDrvIns->iInstance);
466	#endif
467
468	return rc;
469	}
470
471
472	/**
473	* Host Interface network transport driver registration record.
474	*/
475	const PDMDRVREG g_DrvHostInterface =
476	{
477	/* u32Version */
478	PDM_DRVREG_VERSION,
479	/* szDriverName */
480	"HostInterface",
481	/* pszDescription */
482	"Host Interface Network Transport Driver",
483	/* fFlags */
484	PDM_DRVREG_FLAGS_HOST_BITS_DEFAULT,
485	/* fClass. */
486	PDM_DRVREG_CLASS_NETWORK,
487	/* cMaxInstances */
488	~0,
489	/* cbInstance */
490	sizeof(DRVTAP),
491	/* pfnConstruct */
492	drvTAPW32Construct,
493	/* pfnDestruct */
494	drvTAPW32Destruct,
495	/* pfnIOCtl */
496	NULL,
497	/* pfnPowerOn */
498	NULL,
499	/* pfnReset */
500	NULL,
501	/* pfnSuspend */
502	NULL,
503	/* pfnResume */
504	NULL,
505	/* pfnDetach */
506	NULL,
507	/* pfnPowerOff */
508	NULL
509	};

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source: vbox/trunk/src/VBox/Devices/Network/DrvTAPWin.cpp@ 14275

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