USBProxyBackendUsbIp.cpp@ 82968

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1	/* $Id: USBProxyBackendUsbIp.cpp 82968 2020-02-04 10:35:17Z vboxsync $ */
2	/** @file
3	* VirtualBox USB Proxy Backend, USB/IP.
4	*/
5
6	/*
7	* Copyright (C) 2015-2020 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_USBPROXYBACKEND
23	#include "USBProxyService.h"
24	#include "USBGetDevices.h"
25	#include "LoggingNew.h"
26
27	#include <VBox/usb.h>
28	#include <VBox/usblib.h>
29	#include <VBox/err.h>
30
31	#include <iprt/string.h>
32	#include <iprt/alloc.h>
33	#include <iprt/assert.h>
34	#include <iprt/ctype.h>
35	#include <iprt/tcp.h>
36	#include <iprt/env.h>
37	#include <iprt/err.h>
38	#include <iprt/mem.h>
39	#include <iprt/pipe.h>
40	#include <iprt/asm.h>
41	#include <iprt/cdefs.h>
42	#include <iprt/time.h>
43
44	/** The USB/IP default port to connect to. */
45	#define USBIP_PORT_DEFAULT 3240
46	/** The USB version number used for the protocol. */
47	#define USBIP_VERSION UINT16_C(0x0111)
48	/** Request indicator in the command code. */
49	#define USBIP_INDICATOR_REQ RT_BIT(15)
50
51	/** Command/Reply code for OP_REQ/RET_DEVLIST. */
52	#define USBIP_REQ_RET_DEVLIST UINT16_C(5)
53
54	/** @todo Duplicate code in USBProxyDevice-usbip.cpp */
55	/**
56	* Exported device entry in the OP_RET_DEVLIST reply.
57	*/
58	#pragma pack(1)
59	typedef struct UsbIpExportedDevice
60	{
61	/** Path of the device, zero terminated string. */
62	char szPath[256];
63	/** Bus ID of the exported device, zero terminated string. */
64	char szBusId[32];
65	/** Bus number. */
66	uint32_t u32BusNum;
67	/** Device number. */
68	uint32_t u32DevNum;
69	/** Speed indicator of the device. */
70	uint32_t u32Speed;
71	/** Vendor ID of the device. */
72	uint16_t u16VendorId;
73	/** Product ID of the device. */
74	uint16_t u16ProductId;
75	/** Device release number. */
76	uint16_t u16BcdDevice;
77	/** Device class. */
78	uint8_t bDeviceClass;
79	/** Device Subclass. */
80	uint8_t bDeviceSubClass;
81	/** Device protocol. */
82	uint8_t bDeviceProtocol;
83	/** Configuration value. */
84	uint8_t bConfigurationValue;
85	/** Current configuration value of the device. */
86	uint8_t bNumConfigurations;
87	/** Number of interfaces for the device. */
88	uint8_t bNumInterfaces;
89	} UsbIpExportedDevice;
90	/** Pointer to a exported device entry. */
91	typedef UsbIpExportedDevice *PUsbIpExportedDevice;
92	#pragma pack()
93	AssertCompileSize(UsbIpExportedDevice, 312);
94
95	/**
96	* Interface descriptor entry for an exported device.
97	*/
98	#pragma pack(1)
99	typedef struct UsbIpDeviceInterface
100	{
101	/** Intefrace class. */
102	uint8_t bInterfaceClass;
103	/** Interface sub class. */
104	uint8_t bInterfaceSubClass;
105	/** Interface protocol identifier. */
106	uint8_t bInterfaceProtocol;
107	/** Padding byte for alignment. */
108	uint8_t bPadding;
109	} UsbIpDeviceInterface;
110	/** Pointer to an interface descriptor entry. */
111	typedef UsbIpDeviceInterface *PUsbIpDeviceInterface;
112	#pragma pack()
113
114	/**
115	* USB/IP device list request.
116	*/
117	#pragma pack(1)
118	typedef struct UsbIpReqDevList
119	{
120	/** Protocol version number. */
121	uint16_t u16Version;
122	/** Command code. */
123	uint16_t u16Cmd;
124	/** Status field, unused. */
125	int32_t u32Status;
126	} UsbIpReqDevList;
127	/** Pointer to a device list request. */
128	typedef UsbIpReqDevList *PUsbIpReqDevList;
129	#pragma pack()
130
131	/**
132	* USB/IP Import reply.
133	*
134	* This is only the header, for successful
135	* requests the device details are sent to as
136	* defined in UsbIpExportedDevice.
137	*/
138	#pragma pack(1)
139	typedef struct UsbIpRetDevList
140	{
141	/** Protocol version number. */
142	uint16_t u16Version;
143	/** Command code. */
144	uint16_t u16Cmd;
145	/** Status field, unused. */
146	int32_t u32Status;
147	/** Number of exported devices. */
148	uint32_t u32DevicesExported;
149	} UsbIpRetDevList;
150	/** Pointer to a import reply. */
151	typedef UsbIpRetDevList *PUsbIpRetDevList;
152	#pragma pack()
153
154	/** Pollset id of the socket. */
155	#define USBIP_POLL_ID_SOCKET 0
156	/** Pollset id of the pipe. */
157	#define USBIP_POLL_ID_PIPE 1
158
159	/** @name USB/IP error codes.
160	* @{ */
161	/** Success indicator. */
162	#define USBIP_STATUS_SUCCESS INT32_C(0)
163	/** @} */
164
165	/** @name USB/IP device speeds.
166	* @{ */
167	/** Unknown speed. */
168	#define USBIP_SPEED_UNKNOWN 0
169	/** Low (1.0) speed. */
170	#define USBIP_SPEED_LOW 1
171	/** Full (1.1) speed. */
172	#define USBIP_SPEED_FULL 2
173	/** High (2.0) speed. */
174	#define USBIP_SPEED_HIGH 3
175	/** Variable (CWUSB) speed. */
176	#define USBIP_SPEED_WIRELESS 4
177	/** Super (3.0) speed. */
178	#define USBIP_SPEED_SUPER 5
179	/** @} */
180
181	/**
182	* Private USB/IP proxy backend data.
183	*/
184	struct USBProxyBackendUsbIp::Data
185	{
186	Data()
187	: hSocket(NIL_RTSOCKET),
188	hWakeupPipeR(NIL_RTPIPE),
189	hWakeupPipeW(NIL_RTPIPE),
190	hPollSet(NIL_RTPOLLSET),
191	uPort(USBIP_PORT_DEFAULT),
192	pszHost(NULL),
193	hMtxDevices(NIL_RTSEMFASTMUTEX),
194	cUsbDevicesCur(0),
195	pUsbDevicesCur(NULL),
196	enmRecvState(kUsbIpRecvState_Invalid),
197	cbResidualRecv(0),
198	pbRecvBuf(NULL),
199	cDevicesLeft(0),
200	pHead(NULL),
201	ppNext(&pHead)
202	{ }
203
204	/** Socket handle to the server. */
205	RTSOCKET hSocket;
206	/** Pipe used to interrupt wait(), the read end. */
207	RTPIPE hWakeupPipeR;
208	/** Pipe used to interrupt wait(), the write end. */
209	RTPIPE hWakeupPipeW;
210	/** Pollset for the socket and wakeup pipe. */
211	RTPOLLSET hPollSet;
212	/** Port of the USB/IP host to connect to. */
213	uint32_t uPort;
214	/** USB/IP host address. */
215	char *pszHost;
216	/** Mutex protecting the device list against concurrent access. */
217	RTSEMFASTMUTEX hMtxDevices;
218	/** Number of devices in the list. */
219	uint32_t cUsbDevicesCur;
220	/** The current list of devices to compare with. */
221	PUSBDEVICE pUsbDevicesCur;
222	/** Current receive state. */
223	USBIPRECVSTATE enmRecvState;
224	/** Scratch space for holding the data until it was completely received.
225	* Which one to access is based on the current receive state. */
226	union
227	{
228	UsbIpRetDevList RetDevList;
229	UsbIpExportedDevice ExportedDevice;
230	UsbIpDeviceInterface DeviceInterface;
231	/** Byte view. */
232	uint8_t abRecv[1];
233	} Scratch;
234	/** Residual number of bytes to receive before we can work with the data. */
235	size_t cbResidualRecv;
236	/** Current pointer into the scratch buffer. */
237	uint8_t *pbRecvBuf;
238	/** Number of devices left to receive for the current request. */
239	uint32_t cDevicesLeft;
240	/** Number of interfaces to skip during receive. */
241	uint32_t cInterfacesLeft;
242	/** The current head pointer for the new device list. */
243	PUSBDEVICE pHead;
244	/** The next pointer to add a device to. */
245	PUSBDEVICE *ppNext;
246	/** Current amount of devices in the list. */
247	uint32_t cDevicesCur;
248	/** Timestamp of the last time we successfully connected. */
249	uint64_t tsConnectSuccessLast;
250	};
251
252	/**
253	* Convert the given exported device structure from host to network byte order.
254	*
255	* @returns nothing.
256	* @param pDevice The device structure to convert.
257	*/
258	DECLINLINE(void) usbProxyBackendUsbIpExportedDeviceN2H(PUsbIpExportedDevice pDevice)
259	{
260	pDevice->u32BusNum = RT_N2H_U32(pDevice->u32BusNum);
261	pDevice->u32DevNum = RT_N2H_U32(pDevice->u32DevNum);
262	pDevice->u32Speed = RT_N2H_U32(pDevice->u32Speed);
263	pDevice->u16VendorId = RT_N2H_U16(pDevice->u16VendorId);
264	pDevice->u16ProductId = RT_N2H_U16(pDevice->u16ProductId);
265	pDevice->u16BcdDevice = RT_N2H_U16(pDevice->u16BcdDevice);
266	}
267
268	/**
269	* Initialize data members.
270	*/
271	USBProxyBackendUsbIp::USBProxyBackendUsbIp()
272	: USBProxyBackend()
273	{
274	}
275
276	USBProxyBackendUsbIp::~USBProxyBackendUsbIp()
277	{
278
279	}
280
281	/**
282	* Initializes the object (called right after construction).
283	*
284	* @returns S_OK on success and non-fatal failures, some COM error otherwise.
285	*/
286	int USBProxyBackendUsbIp::init(USBProxyService *pUsbProxyService, const com::Utf8Str &strId,
287	const com::Utf8Str &strAddress, bool fLoadingSettings)
288	{
289	int rc = VINF_SUCCESS;
290
291	USBProxyBackend::init(pUsbProxyService, strId, strAddress, fLoadingSettings);
292
293	unconst(m_strBackend) = Utf8Str("USBIP");
294
295	m = new Data;
296
297	m->tsConnectSuccessLast = 0;
298
299	/* Split address into hostname and port. */
300	RTCList<RTCString> lstAddress = strAddress.split(":");
301	if (lstAddress.size() < 1)
302	return VERR_INVALID_PARAMETER;
303	m->pszHost = RTStrDup(lstAddress[0].c_str());
304	if (!m->pszHost)
305	return VERR_NO_STR_MEMORY;
306	if (lstAddress.size() == 2)
307	{
308	m->uPort = lstAddress[1].toUInt32();
309	if (!m->uPort)
310	return VERR_INVALID_PARAMETER;
311	}
312
313	/* Setup wakeup pipe and poll set first. */
314	rc = RTSemFastMutexCreate(&m->hMtxDevices);
315	if (RT_SUCCESS(rc))
316	{
317	rc = RTPipeCreate(&m->hWakeupPipeR, &m->hWakeupPipeW, 0);
318	if (RT_SUCCESS(rc))
319	{
320	rc = RTPollSetCreate(&m->hPollSet);
321	if (RT_SUCCESS(rc))
322	{
323	rc = RTPollSetAddPipe(m->hPollSet, m->hWakeupPipeR,
324	RTPOLL_EVT_READ, USBIP_POLL_ID_PIPE);
325	if (RT_SUCCESS(rc))
326	{
327	/*
328	* Connect to the USB/IP host. Be more graceful to connection errors
329	* if we are instantiated while the settings are loaded to let
330	* VBoxSVC start.
331	*
332	* The worker thread keeps trying to connect every few seconds until
333	* either the USB source is removed by the user or the USB server is
334	* reachable.
335	*/
336	rc = reconnect();
337	if (RT_SUCCESS(rc) \|\| fLoadingSettings)
338	rc = start(); /* Start service thread. */
339	}
340
341	if (RT_FAILURE(rc))
342	{
343	RTPollSetRemove(m->hPollSet, USBIP_POLL_ID_PIPE);
344	int rc2 = RTPollSetDestroy(m->hPollSet);
345	AssertRC(rc2);
346	m->hPollSet = NIL_RTPOLLSET;
347	}
348	}
349
350	if (RT_FAILURE(rc))
351	{
352	int rc2 = RTPipeClose(m->hWakeupPipeR);
353	AssertRC(rc2);
354	rc2 = RTPipeClose(m->hWakeupPipeW);
355	AssertRC(rc2);
356	m->hWakeupPipeR = m->hWakeupPipeW = NIL_RTPIPE;
357	}
358	}
359	if (RT_FAILURE(rc))
360	{
361	RTSemFastMutexDestroy(m->hMtxDevices);
362	m->hMtxDevices = NIL_RTSEMFASTMUTEX;
363	}
364	}
365
366	return rc;
367	}
368
369	/**
370	* Stop all service threads and free the device chain.
371	*/
372	void USBProxyBackendUsbIp::uninit()
373	{
374	LogFlowThisFunc(("\n"));
375
376	/*
377	* Stop the service.
378	*/
379	if (isActive())
380	stop();
381
382	/*
383	* Free resources.
384	*/
385	if (m->hPollSet != NIL_RTPOLLSET)
386	{
387	disconnect();
388
389	int rc = RTPollSetRemove(m->hPollSet, USBIP_POLL_ID_PIPE);
390	AssertRC(rc);
391	rc = RTPollSetDestroy(m->hPollSet);
392	AssertRC(rc);
393	rc = RTPipeClose(m->hWakeupPipeR);
394	AssertRC(rc);
395	rc = RTPipeClose(m->hWakeupPipeW);
396	AssertRC(rc);
397
398	m->hPollSet = NIL_RTPOLLSET;
399	m->hWakeupPipeR = NIL_RTPIPE;
400	m->hWakeupPipeW = NIL_RTPIPE;
401	}
402
403	if (m->pszHost)
404	RTStrFree(m->pszHost);
405	if (m->hMtxDevices != NIL_RTSEMFASTMUTEX)
406	{
407	RTSemFastMutexDestroy(m->hMtxDevices);
408	m->hMtxDevices = NIL_RTSEMFASTMUTEX;
409	}
410
411	delete m;
412	USBProxyBackend::uninit();
413	}
414
415
416	int USBProxyBackendUsbIp::captureDevice(HostUSBDevice *aDevice)
417	{
418	AssertReturn(aDevice, VERR_GENERAL_FAILURE);
419	AssertReturn(!aDevice->isWriteLockOnCurrentThread(), VERR_GENERAL_FAILURE);
420
421	AutoReadLock devLock(aDevice COMMA_LOCKVAL_SRC_POS);
422	LogFlowThisFunc(("aDevice=%s\n", aDevice->i_getName().c_str()));
423
424	/*
425	* We don't need to do anything when the device is held... fake it.
426	*/
427	Assert(aDevice->i_getUnistate() == kHostUSBDeviceState_Capturing);
428	devLock.release();
429
430	return VINF_SUCCESS;
431	}
432
433
434	int USBProxyBackendUsbIp::releaseDevice(HostUSBDevice *aDevice)
435	{
436	AssertReturn(aDevice, VERR_GENERAL_FAILURE);
437	AssertReturn(!aDevice->isWriteLockOnCurrentThread(), VERR_GENERAL_FAILURE);
438
439	AutoReadLock devLock(aDevice COMMA_LOCKVAL_SRC_POS);
440	LogFlowThisFunc(("aDevice=%s\n", aDevice->i_getName().c_str()));
441
442	/*
443	* We're not really holding it atm., just fake it.
444	*/
445	Assert(aDevice->i_getUnistate() == kHostUSBDeviceState_ReleasingToHost);
446	devLock.release();
447
448	return VINF_SUCCESS;
449	}
450
451
452	bool USBProxyBackendUsbIp::isFakeUpdateRequired()
453	{
454	return true;
455	}
456
457
458	int USBProxyBackendUsbIp::wait(RTMSINTERVAL aMillies)
459	{
460	int rc = VINF_SUCCESS;
461	bool fDeviceListChangedOrWokenUp = false;
462
463	/* Don't start any possibly lengthy operation if we are supposed to return immediately again. */
464	if (!aMillies)
465	return VINF_SUCCESS;
466
467	/* Try to reconnect once when we enter if we lost the connection earlier. */
468	if (m->hSocket == NIL_RTSOCKET)
469	reconnect();
470
471	/* Query a new device list upon entering. */
472	if ( m->hSocket != NIL_RTSOCKET
473	&& m->enmRecvState == kUsbIpRecvState_None)
474	{
475	rc = startListExportedDevicesReq();
476	if (RT_FAILURE(rc))
477	disconnect();
478	}
479
480	/*
481	* Because the USB/IP protocol doesn't specify a way to get notified about
482	* new or removed exported devices we have to poll the host periodically for
483	* a new device list and compare it with the previous one notifying the proxy
484	* service about changes.
485	*/
486	while ( !fDeviceListChangedOrWokenUp
487	&& (aMillies == RT_INDEFINITE_WAIT \|\| aMillies > 0)
488	&& RT_SUCCESS(rc))
489	{
490	RTMSINTERVAL msWait = aMillies;
491	uint64_t msPollStart = RTTimeMilliTS();
492	uint32_t uIdReady = 0;
493	uint32_t fEventsRecv = 0;
494
495	/* Limit the waiting time to 3sec so we can either reconnect or get a new device list. */
496	if (m->hSocket == NIL_RTSOCKET \|\| m->enmRecvState == kUsbIpRecvState_None)
497	msWait = RT_MIN(3000, aMillies);
498
499	rc = RTPoll(m->hPollSet, msWait, &fEventsRecv, &uIdReady);
500	if (RT_SUCCESS(rc))
501	{
502	if (uIdReady == USBIP_POLL_ID_PIPE)
503	{
504	/* Drain the wakeup pipe. */
505	char bRead = 0;
506	size_t cbRead = 0;
507
508	rc = RTPipeRead(m->hWakeupPipeR, &bRead, 1, &cbRead);
509	Assert(RT_SUCCESS(rc) && cbRead == 1);
510	fDeviceListChangedOrWokenUp = true;
511	}
512	else if (uIdReady == USBIP_POLL_ID_SOCKET)
513	{
514	if (fEventsRecv & RTPOLL_EVT_READ)
515	rc = receiveData();
516	if ( RT_SUCCESS(rc)
517	&& (fEventsRecv & RTPOLL_EVT_ERROR))
518	rc = VERR_NET_SHUTDOWN;
519
520	/*
521	* If we are in the none state again we received the previous request
522	* and have a new device list to compare the old against.
523	*/
524	if (m->enmRecvState == kUsbIpRecvState_None)
525	{
526	if (hasDevListChanged(m->pHead))
527	fDeviceListChangedOrWokenUp = true;
528
529	/* Update to the new list in any case now that we have it anyway. */
530	RTSemFastMutexRequest(m->hMtxDevices);
531	freeDeviceList(m->pUsbDevicesCur);
532	m->cUsbDevicesCur = m->cDevicesCur;
533	m->pUsbDevicesCur = m->pHead;
534	RTSemFastMutexRelease(m->hMtxDevices);
535
536	m->pHead = NULL;
537	resetRecvState();
538	}
539
540	/* Current USB/IP server closes the connection after each request, don't abort but try again. */
541	if (rc == VERR_NET_SHUTDOWN \|\| rc == VERR_BROKEN_PIPE \|\| rc == VERR_NET_CONNECTION_RESET_BY_PEER)
542	{
543	Log(("USB/IP: Lost connection to host \"%s\", trying to reconnect...\n", m->pszHost));
544	disconnect();
545	rc = VINF_SUCCESS;
546	}
547	}
548	else
549	{
550	AssertMsgFailed(("Invalid poll ID returned\n"));
551	rc = VERR_INVALID_STATE;
552	}
553	aMillies -= (RTMSINTERVAL)(RTTimeMilliTS() - msPollStart);
554	}
555	else if (rc == VERR_TIMEOUT)
556	{
557	aMillies -= msWait;
558	if (aMillies)
559	{
560	/* Try to reconnect and start a new request if we lost the connection before. */
561	if (m->hSocket == NIL_RTSOCKET)
562	{
563	rc = reconnect();
564	if (RT_SUCCESS(rc))
565	rc = startListExportedDevicesReq();
566	else if ( rc == VERR_NET_SHUTDOWN
567	\|\| rc == VERR_BROKEN_PIPE
568	\|\| rc == VERR_NET_CONNECTION_RESET_BY_PEER
569	\|\| rc == VERR_NET_CONNECTION_REFUSED)
570	{
571	if (hasDevListChanged(m->pHead))
572	fDeviceListChangedOrWokenUp = true;
573	rc = VINF_SUCCESS;
574	}
575	}
576	}
577	}
578	}
579
580	LogFlowFunc(("return rc=%Rrc\n", rc));
581	return rc;
582	}
583
584
585	int USBProxyBackendUsbIp::interruptWait(void)
586	{
587	AssertReturn(!isWriteLockOnCurrentThread(), VERR_GENERAL_FAILURE);
588
589	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
590
591	int rc = RTPipeWriteBlocking(m->hWakeupPipeW, "", 1, NULL);
592	if (RT_SUCCESS(rc))
593	RTPipeFlush(m->hWakeupPipeW);
594	LogFlowFunc(("returning %Rrc\n", rc));
595	return rc;
596	}
597
598
599	PUSBDEVICE USBProxyBackendUsbIp::getDevices(void)
600	{
601	PUSBDEVICE pFirst = NULL;
602	PUSBDEVICE *ppNext = &pFirst;
603
604	LogFlowThisFunc(("\n"));
605
606	/* Create a deep copy of the device list. */
607	RTSemFastMutexRequest(m->hMtxDevices);
608	PUSBDEVICE pCur = m->pUsbDevicesCur;
609	while (pCur)
610	{
611	PUSBDEVICE pNew = (PUSBDEVICE)RTMemAllocZ(sizeof(USBDEVICE));
612	if (pNew)
613	{
614	pNew->pszManufacturer = RTStrDup(pCur->pszManufacturer);
615	pNew->pszProduct = RTStrDup(pCur->pszProduct);
616	if (pCur->pszSerialNumber)
617	pNew->pszSerialNumber = RTStrDup(pCur->pszSerialNumber);
618	pNew->pszBackend = RTStrDup(pCur->pszBackend);
619	pNew->pszAddress = RTStrDup(pCur->pszAddress);
620
621	pNew->idVendor = pCur->idVendor;
622	pNew->idProduct = pCur->idProduct;
623	pNew->bcdDevice = pCur->bcdDevice;
624	pNew->bcdUSB = pCur->bcdUSB;
625	pNew->bDeviceClass = pCur->bDeviceClass;
626	pNew->bDeviceSubClass = pCur->bDeviceSubClass;
627	pNew->bDeviceProtocol = pCur->bDeviceProtocol;
628	pNew->bNumConfigurations = pCur->bNumConfigurations;
629	pNew->enmState = pCur->enmState;
630	pNew->u64SerialHash = pCur->u64SerialHash;
631	pNew->bBus = pCur->bBus;
632	pNew->bPort = pCur->bPort;
633	pNew->enmSpeed = pCur->enmSpeed;
634
635	/* link it */
636	pNew->pNext = NULL;
637	pNew->pPrev = *ppNext;
638	*ppNext = pNew;
639	ppNext = &pNew->pNext;
640	}
641
642	pCur = pCur->pNext;
643	}
644	RTSemFastMutexRelease(m->hMtxDevices);
645
646	LogFlowThisFunc(("returning %#p\n", pFirst));
647	return pFirst;
648	}
649
650	/**
651	* Frees a given device list.
652	*
653	* @returns nothing.
654	* @param pHead The head of the device list to free.
655	*/
656	void USBProxyBackendUsbIp::freeDeviceList(PUSBDEVICE pHead)
657	{
658	PUSBDEVICE pNext = pHead;
659	while (pNext)
660	{
661	PUSBDEVICE pFree = pNext;
662	pNext = pNext->pNext;
663	freeDevice(pFree);
664	}
665	}
666
667	/**
668	* Resets the receive state to the idle state.
669	*
670	* @returns nothing.
671	*/
672	void USBProxyBackendUsbIp::resetRecvState()
673	{
674	LogFlowFunc(("\n"));
675	freeDeviceList(m->pHead);
676	m->pHead = NULL;
677	m->ppNext = &m->pHead;
678	m->cDevicesCur = 0;
679	m->enmRecvState = kUsbIpRecvState_None;
680	m->cbResidualRecv = 0;
681	m->pbRecvBuf = &m->Scratch.abRecv[0];
682	m->cDevicesLeft = 0;
683	LogFlowFunc(("\n"));
684	}
685
686	/**
687	* Disconnects from the host and resets the receive state.
688	*
689	* @returns nothing.
690	*/
691	void USBProxyBackendUsbIp::disconnect()
692	{
693	LogFlowFunc(("\n"));
694
695	if (m->hSocket != NIL_RTSOCKET)
696	{
697	int rc = RTPollSetRemove(m->hPollSet, USBIP_POLL_ID_SOCKET);
698	NOREF(rc);
699	Assert(RT_SUCCESS(rc) \|\| rc == VERR_POLL_HANDLE_ID_NOT_FOUND);
700
701	RTTcpClientCloseEx(m->hSocket, false /fGracefulShutdown/);
702	m->hSocket = NIL_RTSOCKET;
703	}
704
705	resetRecvState();
706	LogFlowFunc(("returns\n"));
707	}
708
709	/**
710	* Tries to reconnect to the USB/IP host.
711	*
712	* @returns VBox status code.
713	*/
714	int USBProxyBackendUsbIp::reconnect()
715	{
716	LogFlowFunc(("\n"));
717
718	/* Make sure we are disconnected. */
719	disconnect();
720
721	/* Connect to the USB/IP host. */
722	int rc = RTTcpClientConnect(m->pszHost, m->uPort, &m->hSocket);
723	if (RT_SUCCESS(rc))
724	{
725	rc = RTTcpSetSendCoalescing(m->hSocket, false);
726	if (RT_FAILURE(rc))
727	LogRelMax(5, ("USB/IP: Disabling send coalescing failed (rc=%Rrc), continuing nevertheless but expect increased latency\n", rc));
728
729	rc = RTPollSetAddSocket(m->hPollSet, m->hSocket, RTPOLL_EVT_READ \| RTPOLL_EVT_ERROR,
730	USBIP_POLL_ID_SOCKET);
731	if (RT_FAILURE(rc))
732	{
733	RTTcpClientCloseEx(m->hSocket, false /fGracefulShutdown/);
734	m->hSocket = NIL_RTSOCKET;
735	}
736	else
737	{
738	LogFlowFunc(("Connected to host \"%s\"\n", m->pszHost));
739	m->tsConnectSuccessLast = RTTimeMilliTS();
740	}
741	}
742	else if (m->tsConnectSuccessLast + 10 * RT_MS_1SEC < RTTimeMilliTS())
743	{
744	/* Make sure the device list is clear if we failed to reconnect for some time. */
745	RTSemFastMutexRequest(m->hMtxDevices);
746	if (m->pUsbDevicesCur)
747	{
748	freeDeviceList(m->pUsbDevicesCur);
749	m->cUsbDevicesCur = 0;
750	m->pUsbDevicesCur = NULL;
751	}
752	RTSemFastMutexRelease(m->hMtxDevices);
753	}
754
755	LogFlowFunc(("returns rc=%Rrc\n", rc));
756	return rc;
757	}
758
759	/**
760	* Initiates a new List Exported Devices request.
761	*
762	* @returns VBox status code.
763	*/
764	int USBProxyBackendUsbIp::startListExportedDevicesReq()
765	{
766	int rc = VINF_SUCCESS;
767
768	LogFlowFunc(("\n"));
769
770	/*
771	* Reset the current state and reconnect in case we were called in the middle
772	* of another transfer (which should not happen).
773	*/
774	Assert(m->enmRecvState == kUsbIpRecvState_None);
775	if (m->enmRecvState != kUsbIpRecvState_None)
776	rc = reconnect();
777
778	if (RT_SUCCESS(rc))
779	{
780	/* Send of the request. */
781	UsbIpReqDevList ReqDevList;
782	ReqDevList.u16Version = RT_H2N_U16(USBIP_VERSION);
783	ReqDevList.u16Cmd = RT_H2N_U16(USBIP_INDICATOR_REQ \| USBIP_REQ_RET_DEVLIST);
784	ReqDevList.u32Status = RT_H2N_U32(0);
785	rc = RTTcpWrite(m->hSocket, &ReqDevList, sizeof(ReqDevList));
786	if (RT_SUCCESS(rc))
787	advanceState(kUsbIpRecvState_Hdr);
788	}
789
790	LogFlowFunc(("returns rc=%Rrc\n", rc));
791	return rc;
792	}
793
794	/**
795	* Advances the state machine to the given state.
796	*
797	* @returns nothing.
798	* @param enmRecvState The new receive state.
799	*/
800	void USBProxyBackendUsbIp::advanceState(USBIPRECVSTATE enmRecvState)
801	{
802	LogFlowFunc(("enmRecvState=%u\n", enmRecvState));
803
804	switch (enmRecvState)
805	{
806	case kUsbIpRecvState_None:
807	break;
808	case kUsbIpRecvState_Hdr:
809	{
810	m->cbResidualRecv = sizeof(UsbIpRetDevList);
811	m->pbRecvBuf = (uint8_t *)&m->Scratch.RetDevList;
812	break;
813	}
814	case kUsbIpRecvState_ExportedDevice:
815	{
816	m->cbResidualRecv = sizeof(UsbIpExportedDevice);
817	m->pbRecvBuf = (uint8_t *)&m->Scratch.ExportedDevice;
818	break;
819	}
820	case kUsbIpRecvState_DeviceInterface:
821	{
822	m->cbResidualRecv = sizeof(UsbIpDeviceInterface);
823	m->pbRecvBuf = (uint8_t *)&m->Scratch.DeviceInterface;
824	break;
825	}
826	default:
827	AssertMsgFailed(("Invalid USB/IP receive state %d\n", enmRecvState));
828	return;
829	}
830
831	m->enmRecvState = enmRecvState;
832	LogFlowFunc(("returns\n"));
833	}
834
835	/**
836	* Receives data from the USB/IP host and processes it when everything for the current
837	* state was received.
838	*
839	* @returns VBox status code.
840	*/
841	int USBProxyBackendUsbIp::receiveData()
842	{
843	int rc = VINF_SUCCESS;
844	size_t cbRecvd = 0;
845
846	LogFlowFunc(("\n"));
847
848	do
849	{
850	rc = RTTcpReadNB(m->hSocket, m->pbRecvBuf, m->cbResidualRecv, &cbRecvd);
851
852	LogFlowFunc(("RTTcpReadNB(%#p, %#p, %zu, %zu) -> %Rrc\n",
853	m->hSocket, m->pbRecvBuf, m->cbResidualRecv, cbRecvd, rc));
854
855	if ( rc == VINF_SUCCESS
856	&& cbRecvd > 0)
857	{
858	m->cbResidualRecv -= cbRecvd;
859	m->pbRecvBuf += cbRecvd;
860	/* In case we received everything for the current state process the data. */
861	if (!m->cbResidualRecv)
862	{
863	rc = processData();
864	if ( RT_SUCCESS(rc)
865	&& m->enmRecvState == kUsbIpRecvState_None)
866	break;
867	}
868	}
869	else if (rc == VINF_TRY_AGAIN)
870	Assert(!cbRecvd);
871
872	} while (rc == VINF_SUCCESS && cbRecvd > 0);
873
874	if (rc == VINF_TRY_AGAIN)
875	rc = VINF_SUCCESS;
876
877	LogFlowFunc(("returns rc=%Rrc\n", rc));
878	return rc;
879	}
880
881	/**
882	* Processes the data in the scratch buffer based on the current state.
883	*
884	* @returns VBox status code.
885	*/
886	int USBProxyBackendUsbIp::processData()
887	{
888	int rc = VINF_SUCCESS;
889
890	switch (m->enmRecvState)
891	{
892	case kUsbIpRecvState_Hdr:
893	{
894	/* Check that the reply matches our expectations. */
895	if ( RT_N2H_U16(m->Scratch.RetDevList.u16Version) == USBIP_VERSION
896	&& RT_N2H_U16(m->Scratch.RetDevList.u16Cmd) == USBIP_REQ_RET_DEVLIST
897	&& RT_N2H_U32(m->Scratch.RetDevList.u32Status) == USBIP_STATUS_SUCCESS)
898	{
899	/* Populate the number of exported devices in the list and go to the next state. */
900	m->cDevicesLeft = RT_N2H_U32(m->Scratch.RetDevList.u32DevicesExported);
901	if (m->cDevicesLeft)
902	advanceState(kUsbIpRecvState_ExportedDevice);
903	else
904	advanceState(kUsbIpRecvState_None);
905	}
906	else
907	{
908	LogRelMax(10, ("USB/IP: Host sent an invalid reply to the list exported device request (Version: %#x Cmd: %#x Status: %#x)\n",
909	RT_N2H_U16(m->Scratch.RetDevList.u16Version), RT_N2H_U16(m->Scratch.RetDevList.u16Cmd),
910	RT_N2H_U32(m->Scratch.RetDevList.u32Status)));
911	/* Disconnect and start over. */
912	advanceState(kUsbIpRecvState_None);
913	disconnect();
914	rc = VERR_NET_SHUTDOWN;
915	}
916	break;
917	}
918	case kUsbIpRecvState_ExportedDevice:
919	{
920	/* Create a new device and add it to the list. */
921	usbProxyBackendUsbIpExportedDeviceN2H(&m->Scratch.ExportedDevice);
922	rc = addDeviceToList(&m->Scratch.ExportedDevice);
923	if (RT_SUCCESS(rc))
924	{
925	m->cInterfacesLeft = m->Scratch.ExportedDevice.bNumInterfaces;
926	if (m->cInterfacesLeft)
927	advanceState(kUsbIpRecvState_DeviceInterface);
928	else
929	{
930	m->cDevicesLeft--;
931	if (m->cDevicesLeft)
932	advanceState(kUsbIpRecvState_ExportedDevice);
933	else
934	advanceState(kUsbIpRecvState_None);
935	}
936	}
937	break;
938	}
939	case kUsbIpRecvState_DeviceInterface:
940	{
941	/*
942	* If all interfaces for the current device were received receive the next device
943	* if there is another one left, if not we are done with the current request.
944	*/
945	m->cInterfacesLeft--;
946	if (m->cInterfacesLeft)
947	advanceState(kUsbIpRecvState_DeviceInterface);
948	else
949	{
950	m->cDevicesLeft--;
951	if (m->cDevicesLeft)
952	advanceState(kUsbIpRecvState_ExportedDevice);
953	else
954	advanceState(kUsbIpRecvState_None);
955	}
956	break;
957	}
958	case kUsbIpRecvState_None:
959	default:
960	AssertMsgFailed(("Invalid USB/IP receive state %d\n", m->enmRecvState));
961	return VERR_INVALID_STATE;
962	}
963
964	return rc;
965	}
966
967	/**
968	* Creates a new USB device and adds it to the list.
969	*
970	* @returns VBox status code.
971	* @param pDev Pointer to the USB/IP exported device structure to take
972	* the information for the new device from.
973	*/
974	int USBProxyBackendUsbIp::addDeviceToList(PUsbIpExportedDevice pDev)
975	{
976	int rc = VINF_SUCCESS;
977	PUSBDEVICE pNew = (PUSBDEVICE)RTMemAllocZ(sizeof(USBDEVICE));
978	if (!pNew)
979	return VERR_NO_MEMORY;
980
981	pNew->pszManufacturer = RTStrDup("");
982	pNew->pszProduct = RTStrDup("");
983	pNew->pszSerialNumber = NULL;
984	pNew->pszBackend = RTStrDup("usbip");
985
986	/* Make sure the Bus id is 0 terminated. */
987	pDev->szBusId[31] = '\0';
988	pNew->pszAddress = RTStrAPrintf2("usbip://%s:%u:%s", m->pszHost, m->uPort, &pDev->szBusId[0]);
989	if (RT_LIKELY(pNew->pszAddress))
990	{
991	pNew->idVendor = pDev->u16VendorId;
992	pNew->idProduct = pDev->u16ProductId;
993	pNew->bcdDevice = pDev->u16BcdDevice;
994	pNew->bDeviceClass = pDev->bDeviceClass;
995	pNew->bDeviceSubClass = pDev->bDeviceSubClass;
996	pNew->bDeviceProtocol = pDev->bDeviceProtocol;
997	pNew->bNumConfigurations = pDev->bNumConfigurations;
998	pNew->enmState = USBDEVICESTATE_USED_BY_HOST_CAPTURABLE;
999	pNew->u64SerialHash = 0;
1000	/** @todo The following is not correct but is required to to get USB testing working
1001	* because only the port can be part of a filter (adding the required attributes for the bus
1002	* breaks API and ABI compatibility).
1003	* Filtering by port number is required for USB testing to connect to the correct device
1004	* in case there are multiple ones.
1005	*/
1006	pNew->bBus = (uint8_t)pDev->u32DevNum;
1007	pNew->bPort = (uint8_t)pDev->u32BusNum;
1008
1009	switch (pDev->u32Speed)
1010	{
1011	case USBIP_SPEED_LOW:
1012	pNew->enmSpeed = USBDEVICESPEED_LOW;
1013	pNew->bcdUSB = 1 << 8;
1014	break;
1015	case USBIP_SPEED_FULL:
1016	pNew->enmSpeed = USBDEVICESPEED_FULL;
1017	pNew->bcdUSB = 1 << 8;
1018	break;
1019	case USBIP_SPEED_HIGH:
1020	pNew->enmSpeed = USBDEVICESPEED_HIGH;
1021	pNew->bcdUSB = 2 << 8;
1022	break;
1023	case USBIP_SPEED_WIRELESS:
1024	pNew->enmSpeed = USBDEVICESPEED_VARIABLE;
1025	pNew->bcdUSB = 1 << 8;
1026	break;
1027	case USBIP_SPEED_SUPER:
1028	pNew->enmSpeed = USBDEVICESPEED_SUPER;
1029	pNew->bcdUSB = 3 << 8;
1030	break;
1031	case USBIP_SPEED_UNKNOWN:
1032	default:
1033	pNew->bcdUSB = 1 << 8;
1034	pNew->enmSpeed = USBDEVICESPEED_UNKNOWN;
1035	}
1036
1037	/* link it */
1038	pNew->pNext = NULL;
1039	pNew->pPrev = *m->ppNext;
1040	*m->ppNext = pNew;
1041	m->ppNext = &pNew->pNext;
1042	m->cDevicesCur++;
1043	}
1044	else
1045	rc = VERR_NO_STR_MEMORY;
1046
1047	if (RT_FAILURE(rc))
1048	{
1049	if (pNew->pszManufacturer)
1050	RTStrFree((char *)pNew->pszManufacturer);
1051	if (pNew->pszProduct)
1052	RTStrFree((char *)pNew->pszProduct);
1053	if (pNew->pszBackend)
1054	RTStrFree((char *)pNew->pszBackend);
1055	if (pNew->pszAddress)
1056	RTStrFree((char *)pNew->pszAddress);
1057	RTMemFree(pNew);
1058	}
1059
1060	return rc;
1061	}
1062
1063	/**
1064	* Compares the given device list with the current one and returns whether it has
1065	* changed.
1066	*
1067	* @returns flag whether the device list has changed compared to the current one.
1068	* @param pDevices The device list to compare the current one against.
1069	*/
1070	bool USBProxyBackendUsbIp::hasDevListChanged(PUSBDEVICE pDevices)
1071	{
1072	/** @todo */
1073	NOREF(pDevices);
1074	return true;
1075	}
1076

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source: vbox/trunk/src/VBox/Main/src-server/generic/USBProxyBackendUsbIp.cpp@ 82968

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