USBProxyBackendUsbIp.cpp@ 98288

Last change on this file since 98288 was 98288, checked in by vboxsync, 22 months ago
Main/src-server: rc -> hrc/vrc (partial). bugref:10223
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1	/* $Id: USBProxyBackendUsbIp.cpp 98288 2023-01-24 15:32:43Z vboxsync $ */
2	/** @file
3	* VirtualBox USB Proxy Backend, USB/IP.
4	*/
5
6	/*
7	* Copyright (C) 2015-2023 Oracle and/or its affiliates.
8	*
9	* This file is part of VirtualBox base platform packages, as
10	* available from https://www.virtualbox.org.
11	*
12	* This program is free software; you can redistribute it and/or
13	* modify it under the terms of the GNU General Public License
14	* as published by the Free Software Foundation, in version 3 of the
15	* License.
16	*
17	* This program is distributed in the hope that it will be useful, but
18	* WITHOUT ANY WARRANTY; without even the implied warranty of
19	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20	* General Public License for more details.
21	*
22	* You should have received a copy of the GNU General Public License
23	* along with this program; if not, see <https://www.gnu.org/licenses>.
24	*
25	* SPDX-License-Identifier: GPL-3.0-only
26	*/
27
28
29	/*********************************************************************************************************************************
30	* Header Files *
31	*********************************************************************************************************************************/
32	#define LOG_GROUP LOG_GROUP_MAIN_USBPROXYBACKEND
33	#include "USBProxyService.h"
34	#include "USBGetDevices.h"
35	#include "LoggingNew.h"
36
37	#include <VBox/usb.h>
38	#include <VBox/usblib.h>
39	#include <VBox/err.h>
40
41	#include <iprt/string.h>
42	#include <iprt/alloc.h>
43	#include <iprt/assert.h>
44	#include <iprt/ctype.h>
45	#include <iprt/tcp.h>
46	#include <iprt/env.h>
47	#include <iprt/err.h>
48	#include <iprt/mem.h>
49	#include <iprt/pipe.h>
50	#include <iprt/asm.h>
51	#include <iprt/cdefs.h>
52	#include <iprt/time.h>
53
54	/** The USB/IP default port to connect to. */
55	#define USBIP_PORT_DEFAULT 3240
56	/** The USB version number used for the protocol. */
57	#define USBIP_VERSION UINT16_C(0x0111)
58	/** Request indicator in the command code. */
59	#define USBIP_INDICATOR_REQ RT_BIT(15)
60
61	/** Command/Reply code for OP_REQ/RET_DEVLIST. */
62	#define USBIP_REQ_RET_DEVLIST UINT16_C(5)
63
64	/** @todo Duplicate code in USBProxyDevice-usbip.cpp */
65	/**
66	* Exported device entry in the OP_RET_DEVLIST reply.
67	*/
68	#pragma pack(1)
69	typedef struct UsbIpExportedDevice
70	{
71	/** Path of the device, zero terminated string. */
72	char szPath[256];
73	/** Bus ID of the exported device, zero terminated string. */
74	char szBusId[32];
75	/** Bus number. */
76	uint32_t u32BusNum;
77	/** Device number. */
78	uint32_t u32DevNum;
79	/** Speed indicator of the device. */
80	uint32_t u32Speed;
81	/** Vendor ID of the device. */
82	uint16_t u16VendorId;
83	/** Product ID of the device. */
84	uint16_t u16ProductId;
85	/** Device release number. */
86	uint16_t u16BcdDevice;
87	/** Device class. */
88	uint8_t bDeviceClass;
89	/** Device Subclass. */
90	uint8_t bDeviceSubClass;
91	/** Device protocol. */
92	uint8_t bDeviceProtocol;
93	/** Configuration value. */
94	uint8_t bConfigurationValue;
95	/** Current configuration value of the device. */
96	uint8_t bNumConfigurations;
97	/** Number of interfaces for the device. */
98	uint8_t bNumInterfaces;
99	} UsbIpExportedDevice;
100	/** Pointer to a exported device entry. */
101	typedef UsbIpExportedDevice *PUsbIpExportedDevice;
102	#pragma pack()
103	AssertCompileSize(UsbIpExportedDevice, 312);
104
105	/**
106	* Interface descriptor entry for an exported device.
107	*/
108	#pragma pack(1)
109	typedef struct UsbIpDeviceInterface
110	{
111	/** Intefrace class. */
112	uint8_t bInterfaceClass;
113	/** Interface sub class. */
114	uint8_t bInterfaceSubClass;
115	/** Interface protocol identifier. */
116	uint8_t bInterfaceProtocol;
117	/** Padding byte for alignment. */
118	uint8_t bPadding;
119	} UsbIpDeviceInterface;
120	/** Pointer to an interface descriptor entry. */
121	typedef UsbIpDeviceInterface *PUsbIpDeviceInterface;
122	#pragma pack()
123
124	/**
125	* USB/IP device list request.
126	*/
127	#pragma pack(1)
128	typedef struct UsbIpReqDevList
129	{
130	/** Protocol version number. */
131	uint16_t u16Version;
132	/** Command code. */
133	uint16_t u16Cmd;
134	/** Status field, unused. */
135	int32_t i32Status;
136	} UsbIpReqDevList;
137	/** Pointer to a device list request. */
138	typedef UsbIpReqDevList *PUsbIpReqDevList;
139	#pragma pack()
140
141	/**
142	* USB/IP Import reply.
143	*
144	* This is only the header, for successful
145	* requests the device details are sent to as
146	* defined in UsbIpExportedDevice.
147	*/
148	#pragma pack(1)
149	typedef struct UsbIpRetDevList
150	{
151	/** Protocol version number. */
152	uint16_t u16Version;
153	/** Command code. */
154	uint16_t u16Cmd;
155	/** Status field, unused. */
156	int32_t i32Status;
157	/** Number of exported devices. */
158	uint32_t u32DevicesExported;
159	} UsbIpRetDevList;
160	/** Pointer to a import reply. */
161	typedef UsbIpRetDevList *PUsbIpRetDevList;
162	#pragma pack()
163
164	/** Pollset id of the socket. */
165	#define USBIP_POLL_ID_SOCKET 0
166	/** Pollset id of the pipe. */
167	#define USBIP_POLL_ID_PIPE 1
168
169	/** @name USB/IP error codes.
170	* @{ */
171	/** Success indicator. */
172	#define USBIP_STATUS_SUCCESS INT32_C(0)
173	/** @} */
174
175	/** @name USB/IP device speeds.
176	* @{ */
177	/** Unknown speed. */
178	#define USBIP_SPEED_UNKNOWN 0
179	/** Low (1.0) speed. */
180	#define USBIP_SPEED_LOW 1
181	/** Full (1.1) speed. */
182	#define USBIP_SPEED_FULL 2
183	/** High (2.0) speed. */
184	#define USBIP_SPEED_HIGH 3
185	/** Variable (CWUSB) speed. */
186	#define USBIP_SPEED_WIRELESS 4
187	/** Super (3.0) speed. */
188	#define USBIP_SPEED_SUPER 5
189	/** @} */
190
191	/**
192	* Private USB/IP proxy backend data.
193	*/
194	struct USBProxyBackendUsbIp::Data
195	{
196	Data()
197	: hSocket(NIL_RTSOCKET),
198	hWakeupPipeR(NIL_RTPIPE),
199	hWakeupPipeW(NIL_RTPIPE),
200	hPollSet(NIL_RTPOLLSET),
201	uPort(USBIP_PORT_DEFAULT),
202	pszHost(NULL),
203	hMtxDevices(NIL_RTSEMFASTMUTEX),
204	cUsbDevicesCur(0),
205	pUsbDevicesCur(NULL),
206	enmRecvState(kUsbIpRecvState_Invalid),
207	cbResidualRecv(0),
208	pbRecvBuf(NULL),
209	cDevicesLeft(0),
210	pHead(NULL),
211	ppNext(&pHead)
212	{ }
213
214	/** Socket handle to the server. */
215	RTSOCKET hSocket;
216	/** Pipe used to interrupt wait(), the read end. */
217	RTPIPE hWakeupPipeR;
218	/** Pipe used to interrupt wait(), the write end. */
219	RTPIPE hWakeupPipeW;
220	/** Pollset for the socket and wakeup pipe. */
221	RTPOLLSET hPollSet;
222	/** Port of the USB/IP host to connect to. */
223	uint32_t uPort;
224	/** USB/IP host address. */
225	char *pszHost;
226	/** Mutex protecting the device list against concurrent access. */
227	RTSEMFASTMUTEX hMtxDevices;
228	/** Number of devices in the list. */
229	uint32_t cUsbDevicesCur;
230	/** The current list of devices to compare with. */
231	PUSBDEVICE pUsbDevicesCur;
232	/** Current receive state. */
233	USBIPRECVSTATE enmRecvState;
234	/** Scratch space for holding the data until it was completely received.
235	* Which one to access is based on the current receive state. */
236	union
237	{
238	UsbIpRetDevList RetDevList;
239	UsbIpExportedDevice ExportedDevice;
240	UsbIpDeviceInterface DeviceInterface;
241	/** Byte view. */
242	uint8_t abRecv[1];
243	} Scratch;
244	/** Residual number of bytes to receive before we can work with the data. */
245	size_t cbResidualRecv;
246	/** Current pointer into the scratch buffer. */
247	uint8_t *pbRecvBuf;
248	/** Number of devices left to receive for the current request. */
249	uint32_t cDevicesLeft;
250	/** Number of interfaces to skip during receive. */
251	uint32_t cInterfacesLeft;
252	/** The current head pointer for the new device list. */
253	PUSBDEVICE pHead;
254	/** The next pointer to add a device to. */
255	PUSBDEVICE *ppNext;
256	/** Current amount of devices in the list. */
257	uint32_t cDevicesCur;
258	/** Timestamp of the last time we successfully connected. */
259	uint64_t tsConnectSuccessLast;
260	};
261
262	/**
263	* Convert the given exported device structure from host to network byte order.
264	*
265	* @returns nothing.
266	* @param pDevice The device structure to convert.
267	*/
268	DECLINLINE(void) usbProxyBackendUsbIpExportedDeviceN2H(PUsbIpExportedDevice pDevice)
269	{
270	pDevice->u32BusNum = RT_N2H_U32(pDevice->u32BusNum);
271	pDevice->u32DevNum = RT_N2H_U32(pDevice->u32DevNum);
272	pDevice->u32Speed = RT_N2H_U32(pDevice->u32Speed);
273	pDevice->u16VendorId = RT_N2H_U16(pDevice->u16VendorId);
274	pDevice->u16ProductId = RT_N2H_U16(pDevice->u16ProductId);
275	pDevice->u16BcdDevice = RT_N2H_U16(pDevice->u16BcdDevice);
276	}
277
278	/**
279	* Initialize data members.
280	*/
281	USBProxyBackendUsbIp::USBProxyBackendUsbIp()
282	: USBProxyBackend()
283	{
284	}
285
286	USBProxyBackendUsbIp::~USBProxyBackendUsbIp()
287	{
288
289	}
290
291	/**
292	* Initializes the object (called right after construction).
293	*
294	* @returns S_OK on success and non-fatal failures, some COM error otherwise.
295	*/
296	int USBProxyBackendUsbIp::init(USBProxyService *pUsbProxyService, const com::Utf8Str &strId,
297	const com::Utf8Str &strAddress, bool fLoadingSettings)
298	{
299	int vrc = VINF_SUCCESS;
300
301	USBProxyBackend::init(pUsbProxyService, strId, strAddress, fLoadingSettings);
302
303	unconst(m_strBackend) = Utf8Str("USBIP");
304
305	m = new Data;
306
307	m->tsConnectSuccessLast = 0;
308
309	/* Split address into hostname and port. */
310	RTCList<RTCString> lstAddress = strAddress.split(":");
311	if (lstAddress.size() < 1)
312	return VERR_INVALID_PARAMETER;
313	m->pszHost = RTStrDup(lstAddress[0].c_str());
314	if (!m->pszHost)
315	return VERR_NO_STR_MEMORY;
316	if (lstAddress.size() == 2)
317	{
318	m->uPort = lstAddress[1].toUInt32();
319	if (!m->uPort)
320	return VERR_INVALID_PARAMETER;
321	}
322
323	/* Setup wakeup pipe and poll set first. */
324	vrc = RTSemFastMutexCreate(&m->hMtxDevices);
325	if (RT_SUCCESS(vrc))
326	{
327	vrc = RTPipeCreate(&m->hWakeupPipeR, &m->hWakeupPipeW, 0);
328	if (RT_SUCCESS(vrc))
329	{
330	vrc = RTPollSetCreate(&m->hPollSet);
331	if (RT_SUCCESS(vrc))
332	{
333	vrc = RTPollSetAddPipe(m->hPollSet, m->hWakeupPipeR, RTPOLL_EVT_READ, USBIP_POLL_ID_PIPE);
334	if (RT_SUCCESS(vrc))
335	{
336	/*
337	* Connect to the USB/IP host. Be more graceful to connection errors
338	* if we are instantiated while the settings are loaded to let
339	* VBoxSVC start.
340	*
341	* The worker thread keeps trying to connect every few seconds until
342	* either the USB source is removed by the user or the USB server is
343	* reachable.
344	*/
345	vrc = reconnect();
346	if (RT_SUCCESS(vrc) \|\| fLoadingSettings)
347	vrc = start(); /* Start service thread. */
348	}
349
350	if (RT_FAILURE(vrc))
351	{
352	RTPollSetRemove(m->hPollSet, USBIP_POLL_ID_PIPE);
353	int rc2 = RTPollSetDestroy(m->hPollSet);
354	AssertRC(rc2);
355	m->hPollSet = NIL_RTPOLLSET;
356	}
357	}
358
359	if (RT_FAILURE(vrc))
360	{
361	int rc2 = RTPipeClose(m->hWakeupPipeR);
362	AssertRC(rc2);
363	rc2 = RTPipeClose(m->hWakeupPipeW);
364	AssertRC(rc2);
365	m->hWakeupPipeR = m->hWakeupPipeW = NIL_RTPIPE;
366	}
367	}
368	if (RT_FAILURE(vrc))
369	{
370	RTSemFastMutexDestroy(m->hMtxDevices);
371	m->hMtxDevices = NIL_RTSEMFASTMUTEX;
372	}
373	}
374
375	return vrc;
376	}
377
378	/**
379	* Stop all service threads and free the device chain.
380	*/
381	void USBProxyBackendUsbIp::uninit()
382	{
383	LogFlowThisFunc(("\n"));
384
385	/*
386	* Stop the service.
387	*/
388	if (isActive())
389	stop();
390
391	/*
392	* Free resources.
393	*/
394	if (m->hPollSet != NIL_RTPOLLSET)
395	{
396	disconnect();
397
398	int vrc = RTPollSetRemove(m->hPollSet, USBIP_POLL_ID_PIPE);
399	AssertRC(vrc);
400	vrc = RTPollSetDestroy(m->hPollSet);
401	AssertRC(vrc);
402	vrc = RTPipeClose(m->hWakeupPipeR);
403	AssertRC(vrc);
404	vrc = RTPipeClose(m->hWakeupPipeW);
405	AssertRC(vrc);
406
407	m->hPollSet = NIL_RTPOLLSET;
408	m->hWakeupPipeR = NIL_RTPIPE;
409	m->hWakeupPipeW = NIL_RTPIPE;
410	}
411
412	if (m->pszHost)
413	RTStrFree(m->pszHost);
414	if (m->hMtxDevices != NIL_RTSEMFASTMUTEX)
415	{
416	RTSemFastMutexDestroy(m->hMtxDevices);
417	m->hMtxDevices = NIL_RTSEMFASTMUTEX;
418	}
419
420	delete m;
421	USBProxyBackend::uninit();
422	}
423
424
425	int USBProxyBackendUsbIp::captureDevice(HostUSBDevice *aDevice)
426	{
427	AssertReturn(aDevice, VERR_GENERAL_FAILURE);
428	AssertReturn(!aDevice->isWriteLockOnCurrentThread(), VERR_GENERAL_FAILURE);
429
430	AutoReadLock devLock(aDevice COMMA_LOCKVAL_SRC_POS);
431	LogFlowThisFunc(("aDevice=%s\n", aDevice->i_getName().c_str()));
432
433	/*
434	* We don't need to do anything when the device is held... fake it.
435	*/
436	Assert(aDevice->i_getUnistate() == kHostUSBDeviceState_Capturing);
437	devLock.release();
438
439	return VINF_SUCCESS;
440	}
441
442
443	int USBProxyBackendUsbIp::releaseDevice(HostUSBDevice *aDevice)
444	{
445	AssertReturn(aDevice, VERR_GENERAL_FAILURE);
446	AssertReturn(!aDevice->isWriteLockOnCurrentThread(), VERR_GENERAL_FAILURE);
447
448	AutoReadLock devLock(aDevice COMMA_LOCKVAL_SRC_POS);
449	LogFlowThisFunc(("aDevice=%s\n", aDevice->i_getName().c_str()));
450
451	/*
452	* We're not really holding it atm., just fake it.
453	*/
454	Assert(aDevice->i_getUnistate() == kHostUSBDeviceState_ReleasingToHost);
455	devLock.release();
456
457	return VINF_SUCCESS;
458	}
459
460
461	bool USBProxyBackendUsbIp::isFakeUpdateRequired()
462	{
463	return true;
464	}
465
466
467	int USBProxyBackendUsbIp::wait(RTMSINTERVAL aMillies)
468	{
469	int vrc = VINF_SUCCESS;
470	bool fDeviceListChangedOrWokenUp = false;
471
472	/* Don't start any possibly lengthy operation if we are supposed to return immediately again. */
473	if (!aMillies)
474	return VINF_SUCCESS;
475
476	/* Try to reconnect once when we enter if we lost the connection earlier. */
477	if (m->hSocket == NIL_RTSOCKET)
478	reconnect();
479
480	/* Query a new device list upon entering. */
481	if ( m->hSocket != NIL_RTSOCKET
482	&& m->enmRecvState == kUsbIpRecvState_None)
483	{
484	vrc = startListExportedDevicesReq();
485	if (RT_FAILURE(vrc))
486	disconnect();
487	}
488
489	/*
490	* Because the USB/IP protocol doesn't specify a way to get notified about
491	* new or removed exported devices we have to poll the host periodically for
492	* a new device list and compare it with the previous one notifying the proxy
493	* service about changes.
494	*/
495	while ( !fDeviceListChangedOrWokenUp
496	&& (aMillies == RT_INDEFINITE_WAIT \|\| aMillies > 0)
497	&& RT_SUCCESS(vrc))
498	{
499	RTMSINTERVAL msWait = aMillies;
500	uint64_t msPollStart = RTTimeMilliTS();
501	uint32_t uIdReady = 0;
502	uint32_t fEventsRecv = 0;
503
504	/* Limit the waiting time to 3sec so we can either reconnect or get a new device list. */
505	if (m->hSocket == NIL_RTSOCKET \|\| m->enmRecvState == kUsbIpRecvState_None)
506	msWait = RT_MIN(3000, aMillies);
507
508	vrc = RTPoll(m->hPollSet, msWait, &fEventsRecv, &uIdReady);
509	if (RT_SUCCESS(vrc))
510	{
511	if (uIdReady == USBIP_POLL_ID_PIPE)
512	{
513	/* Drain the wakeup pipe. */
514	char bRead = 0;
515	size_t cbRead = 0;
516
517	vrc = RTPipeRead(m->hWakeupPipeR, &bRead, 1, &cbRead);
518	Assert(RT_SUCCESS(vrc) && cbRead == 1);
519	fDeviceListChangedOrWokenUp = true;
520	}
521	else if (uIdReady == USBIP_POLL_ID_SOCKET)
522	{
523	if (fEventsRecv & RTPOLL_EVT_READ)
524	vrc = receiveData();
525	if ( RT_SUCCESS(vrc)
526	&& (fEventsRecv & RTPOLL_EVT_ERROR))
527	vrc = VERR_NET_SHUTDOWN;
528
529	/*
530	* If we are in the none state again we received the previous request
531	* and have a new device list to compare the old against.
532	*/
533	if (m->enmRecvState == kUsbIpRecvState_None)
534	{
535	if (hasDevListChanged(m->pHead))
536	fDeviceListChangedOrWokenUp = true;
537
538	/* Update to the new list in any case now that we have it anyway. */
539	RTSemFastMutexRequest(m->hMtxDevices);
540	freeDeviceList(m->pUsbDevicesCur);
541	m->cUsbDevicesCur = m->cDevicesCur;
542	m->pUsbDevicesCur = m->pHead;
543	RTSemFastMutexRelease(m->hMtxDevices);
544
545	m->pHead = NULL;
546	resetRecvState();
547	}
548
549	/* Current USB/IP server closes the connection after each request, don't abort but try again. */
550	if (vrc == VERR_NET_SHUTDOWN \|\| vrc == VERR_BROKEN_PIPE \|\| vrc == VERR_NET_CONNECTION_RESET_BY_PEER)
551	{
552	Log(("USB/IP: Lost connection to host \"%s\", trying to reconnect...\n", m->pszHost));
553	disconnect();
554	vrc = VINF_SUCCESS;
555	}
556	}
557	else
558	{
559	AssertMsgFailed(("Invalid poll ID returned\n"));
560	vrc = VERR_INVALID_STATE;
561	}
562	aMillies -= (RTMSINTERVAL)(RTTimeMilliTS() - msPollStart);
563	}
564	else if (vrc == VERR_TIMEOUT)
565	{
566	aMillies -= msWait;
567	if (aMillies)
568	{
569	/* Try to reconnect and start a new request if we lost the connection before. */
570	if (m->hSocket == NIL_RTSOCKET)
571	{
572	vrc = reconnect();
573	if (RT_SUCCESS(vrc))
574	vrc = startListExportedDevicesReq();
575	else if ( vrc == VERR_NET_SHUTDOWN
576	\|\| vrc == VERR_BROKEN_PIPE
577	\|\| vrc == VERR_NET_CONNECTION_RESET_BY_PEER
578	\|\| vrc == VERR_NET_CONNECTION_REFUSED)
579	{
580	if (hasDevListChanged(m->pHead))
581	fDeviceListChangedOrWokenUp = true;
582	vrc = VINF_SUCCESS;
583	}
584	}
585	}
586	}
587	}
588
589	LogFlowFunc(("return vrc=%Rrc\n", vrc));
590	return vrc;
591	}
592
593
594	int USBProxyBackendUsbIp::interruptWait(void)
595	{
596	AssertReturn(!isWriteLockOnCurrentThread(), VERR_GENERAL_FAILURE);
597
598	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
599
600	int vrc = RTPipeWriteBlocking(m->hWakeupPipeW, "", 1, NULL);
601	if (RT_SUCCESS(vrc))
602	RTPipeFlush(m->hWakeupPipeW);
603	LogFlowFunc(("returning %Rrc\n", vrc));
604	return vrc;
605	}
606
607
608	PUSBDEVICE USBProxyBackendUsbIp::getDevices(void)
609	{
610	PUSBDEVICE pFirst = NULL;
611	PUSBDEVICE *ppNext = &pFirst;
612
613	LogFlowThisFunc(("\n"));
614
615	/* Create a deep copy of the device list. */
616	RTSemFastMutexRequest(m->hMtxDevices);
617	PUSBDEVICE pCur = m->pUsbDevicesCur;
618	while (pCur)
619	{
620	PUSBDEVICE pNew = (PUSBDEVICE)RTMemAllocZ(sizeof(USBDEVICE));
621	if (pNew)
622	{
623	pNew->pszManufacturer = RTStrDup(pCur->pszManufacturer);
624	pNew->pszProduct = RTStrDup(pCur->pszProduct);
625	if (pCur->pszSerialNumber)
626	pNew->pszSerialNumber = RTStrDup(pCur->pszSerialNumber);
627	pNew->pszBackend = RTStrDup(pCur->pszBackend);
628	pNew->pszAddress = RTStrDup(pCur->pszAddress);
629
630	pNew->idVendor = pCur->idVendor;
631	pNew->idProduct = pCur->idProduct;
632	pNew->bcdDevice = pCur->bcdDevice;
633	pNew->bcdUSB = pCur->bcdUSB;
634	pNew->bDeviceClass = pCur->bDeviceClass;
635	pNew->bDeviceSubClass = pCur->bDeviceSubClass;
636	pNew->bDeviceProtocol = pCur->bDeviceProtocol;
637	pNew->bNumConfigurations = pCur->bNumConfigurations;
638	pNew->enmState = pCur->enmState;
639	pNew->u64SerialHash = pCur->u64SerialHash;
640	pNew->bBus = pCur->bBus;
641	pNew->bPort = pCur->bPort;
642	pNew->enmSpeed = pCur->enmSpeed;
643
644	/* link it */
645	pNew->pNext = NULL;
646	pNew->pPrev = *ppNext;
647	*ppNext = pNew;
648	ppNext = &pNew->pNext;
649	}
650
651	pCur = pCur->pNext;
652	}
653	RTSemFastMutexRelease(m->hMtxDevices);
654
655	LogFlowThisFunc(("returning %#p\n", pFirst));
656	return pFirst;
657	}
658
659	/**
660	* Frees a given device list.
661	*
662	* @returns nothing.
663	* @param pHead The head of the device list to free.
664	*/
665	void USBProxyBackendUsbIp::freeDeviceList(PUSBDEVICE pHead)
666	{
667	PUSBDEVICE pNext = pHead;
668	while (pNext)
669	{
670	PUSBDEVICE pFree = pNext;
671	pNext = pNext->pNext;
672	freeDevice(pFree);
673	}
674	}
675
676	/**
677	* Resets the receive state to the idle state.
678	*
679	* @returns nothing.
680	*/
681	void USBProxyBackendUsbIp::resetRecvState()
682	{
683	LogFlowFunc(("\n"));
684	freeDeviceList(m->pHead);
685	m->pHead = NULL;
686	m->ppNext = &m->pHead;
687	m->cDevicesCur = 0;
688	m->enmRecvState = kUsbIpRecvState_None;
689	m->cbResidualRecv = 0;
690	m->pbRecvBuf = &m->Scratch.abRecv[0];
691	m->cDevicesLeft = 0;
692	LogFlowFunc(("\n"));
693	}
694
695	/**
696	* Disconnects from the host and resets the receive state.
697	*
698	* @returns nothing.
699	*/
700	void USBProxyBackendUsbIp::disconnect()
701	{
702	LogFlowFunc(("\n"));
703
704	if (m->hSocket != NIL_RTSOCKET)
705	{
706	int vrc = RTPollSetRemove(m->hPollSet, USBIP_POLL_ID_SOCKET);
707	NOREF(vrc);
708	Assert(RT_SUCCESS(vrc) \|\| vrc == VERR_POLL_HANDLE_ID_NOT_FOUND);
709
710	RTTcpClientCloseEx(m->hSocket, false /fGracefulShutdown/);
711	m->hSocket = NIL_RTSOCKET;
712	}
713
714	resetRecvState();
715	LogFlowFunc(("returns\n"));
716	}
717
718	/**
719	* Tries to reconnect to the USB/IP host.
720	*
721	* @returns VBox status code.
722	*/
723	int USBProxyBackendUsbIp::reconnect()
724	{
725	LogFlowFunc(("\n"));
726
727	/* Make sure we are disconnected. */
728	disconnect();
729
730	/* Connect to the USB/IP host. */
731	int vrc = RTTcpClientConnect(m->pszHost, m->uPort, &m->hSocket);
732	if (RT_SUCCESS(vrc))
733	{
734	vrc = RTTcpSetSendCoalescing(m->hSocket, false);
735	if (RT_FAILURE(vrc))
736	LogRelMax(5, ("USB/IP: Disabling send coalescing failed (vrc=%Rrc), continuing nevertheless but expect increased latency\n", vrc));
737
738	vrc = RTPollSetAddSocket(m->hPollSet, m->hSocket, RTPOLL_EVT_READ \| RTPOLL_EVT_ERROR, USBIP_POLL_ID_SOCKET);
739	if (RT_FAILURE(vrc))
740	{
741	RTTcpClientCloseEx(m->hSocket, false /fGracefulShutdown/);
742	m->hSocket = NIL_RTSOCKET;
743	}
744	else
745	{
746	LogFlowFunc(("Connected to host \"%s\"\n", m->pszHost));
747	m->tsConnectSuccessLast = RTTimeMilliTS();
748	}
749	}
750	else if (m->tsConnectSuccessLast + 10 * RT_MS_1SEC < RTTimeMilliTS())
751	{
752	/* Make sure the device list is clear if we failed to reconnect for some time. */
753	RTSemFastMutexRequest(m->hMtxDevices);
754	if (m->pUsbDevicesCur)
755	{
756	freeDeviceList(m->pUsbDevicesCur);
757	m->cUsbDevicesCur = 0;
758	m->pUsbDevicesCur = NULL;
759	}
760	RTSemFastMutexRelease(m->hMtxDevices);
761	}
762
763	LogFlowFunc(("returns vrc=%Rrc\n", vrc));
764	return vrc;
765	}
766
767	/**
768	* Initiates a new List Exported Devices request.
769	*
770	* @returns VBox status code.
771	*/
772	int USBProxyBackendUsbIp::startListExportedDevicesReq()
773	{
774	int vrc = VINF_SUCCESS;
775
776	LogFlowFunc(("\n"));
777
778	/*
779	* Reset the current state and reconnect in case we were called in the middle
780	* of another transfer (which should not happen).
781	*/
782	Assert(m->enmRecvState == kUsbIpRecvState_None);
783	if (m->enmRecvState != kUsbIpRecvState_None)
784	vrc = reconnect();
785
786	if (RT_SUCCESS(vrc))
787	{
788	/* Send of the request. */
789	UsbIpReqDevList ReqDevList;
790	ReqDevList.u16Version = RT_H2N_U16(USBIP_VERSION);
791	ReqDevList.u16Cmd = RT_H2N_U16(USBIP_INDICATOR_REQ \| USBIP_REQ_RET_DEVLIST);
792	ReqDevList.i32Status = RT_H2N_S32(0);
793
794	vrc = RTTcpWrite(m->hSocket, &ReqDevList, sizeof(ReqDevList));
795	if (RT_SUCCESS(vrc))
796	advanceState(kUsbIpRecvState_Hdr);
797	}
798
799	LogFlowFunc(("returns vrc=%Rrc\n", vrc));
800	return vrc;
801	}
802
803	/**
804	* Advances the state machine to the given state.
805	*
806	* @returns nothing.
807	* @param enmRecvState The new receive state.
808	*/
809	void USBProxyBackendUsbIp::advanceState(USBIPRECVSTATE enmRecvState)
810	{
811	LogFlowFunc(("enmRecvState=%u\n", enmRecvState));
812
813	switch (enmRecvState)
814	{
815	case kUsbIpRecvState_None:
816	break;
817	case kUsbIpRecvState_Hdr:
818	{
819	m->cbResidualRecv = sizeof(UsbIpRetDevList);
820	m->pbRecvBuf = (uint8_t *)&m->Scratch.RetDevList;
821	break;
822	}
823	case kUsbIpRecvState_ExportedDevice:
824	{
825	m->cbResidualRecv = sizeof(UsbIpExportedDevice);
826	m->pbRecvBuf = (uint8_t *)&m->Scratch.ExportedDevice;
827	break;
828	}
829	case kUsbIpRecvState_DeviceInterface:
830	{
831	m->cbResidualRecv = sizeof(UsbIpDeviceInterface);
832	m->pbRecvBuf = (uint8_t *)&m->Scratch.DeviceInterface;
833	break;
834	}
835	default:
836	AssertMsgFailed(("Invalid USB/IP receive state %d\n", enmRecvState));
837	return;
838	}
839
840	m->enmRecvState = enmRecvState;
841	LogFlowFunc(("returns\n"));
842	}
843
844	/**
845	* Receives data from the USB/IP host and processes it when everything for the current
846	* state was received.
847	*
848	* @returns VBox status code.
849	*/
850	int USBProxyBackendUsbIp::receiveData()
851	{
852	int vrc = VINF_SUCCESS;
853	size_t cbRecvd = 0;
854
855	LogFlowFunc(("\n"));
856
857	do
858	{
859	vrc = RTTcpReadNB(m->hSocket, m->pbRecvBuf, m->cbResidualRecv, &cbRecvd);
860
861	LogFlowFunc(("RTTcpReadNB(%#p, %#p, %zu, %zu) -> %Rrc\n", m->hSocket, m->pbRecvBuf, m->cbResidualRecv, cbRecvd, vrc));
862
863	if ( vrc == VINF_SUCCESS
864	&& cbRecvd > 0)
865	{
866	m->cbResidualRecv -= cbRecvd;
867	m->pbRecvBuf += cbRecvd;
868	/* In case we received everything for the current state process the data. */
869	if (!m->cbResidualRecv)
870	{
871	vrc = processData();
872	if ( RT_SUCCESS(vrc)
873	&& m->enmRecvState == kUsbIpRecvState_None)
874	break;
875	}
876	}
877	else if (vrc == VINF_TRY_AGAIN)
878	Assert(!cbRecvd);
879
880	} while (vrc == VINF_SUCCESS && cbRecvd > 0);
881
882	if (vrc == VINF_TRY_AGAIN)
883	vrc = VINF_SUCCESS;
884
885	LogFlowFunc(("returns vrc=%Rrc\n", vrc));
886	return vrc;
887	}
888
889	/**
890	* Processes the data in the scratch buffer based on the current state.
891	*
892	* @returns VBox status code.
893	*/
894	int USBProxyBackendUsbIp::processData()
895	{
896	int vrc = VINF_SUCCESS;
897
898	switch (m->enmRecvState)
899	{
900	case kUsbIpRecvState_Hdr:
901	{
902	/* Check that the reply matches our expectations. */
903	if ( RT_N2H_U16(m->Scratch.RetDevList.u16Version) == USBIP_VERSION
904	&& RT_N2H_U16(m->Scratch.RetDevList.u16Cmd) == USBIP_REQ_RET_DEVLIST
905	&& RT_N2H_S32(m->Scratch.RetDevList.i32Status) == USBIP_STATUS_SUCCESS)
906
907	{
908	/* Populate the number of exported devices in the list and go to the next state. */
909	m->cDevicesLeft = RT_N2H_U32(m->Scratch.RetDevList.u32DevicesExported);
910	if (m->cDevicesLeft)
911	advanceState(kUsbIpRecvState_ExportedDevice);
912	else
913	advanceState(kUsbIpRecvState_None);
914	}
915	else
916	{
917	LogRelMax(10, ("USB/IP: Host sent an invalid reply to the list exported device request (Version: %#x Cmd: %#x Status: %#x)\n",
918	RT_N2H_U16(m->Scratch.RetDevList.u16Version), RT_N2H_U16(m->Scratch.RetDevList.u16Cmd),
919	RT_N2H_S32(m->Scratch.RetDevList.i32Status)));
920	/* Disconnect and start over. */
921	advanceState(kUsbIpRecvState_None);
922	disconnect();
923	vrc = VERR_NET_SHUTDOWN;
924	}
925	break;
926	}
927	case kUsbIpRecvState_ExportedDevice:
928	{
929	/* Create a new device and add it to the list. */
930	usbProxyBackendUsbIpExportedDeviceN2H(&m->Scratch.ExportedDevice);
931	vrc = addDeviceToList(&m->Scratch.ExportedDevice);
932	if (RT_SUCCESS(vrc))
933	{
934	m->cInterfacesLeft = m->Scratch.ExportedDevice.bNumInterfaces;
935	if (m->cInterfacesLeft)
936	advanceState(kUsbIpRecvState_DeviceInterface);
937	else
938	{
939	m->cDevicesLeft--;
940	if (m->cDevicesLeft)
941	advanceState(kUsbIpRecvState_ExportedDevice);
942	else
943	advanceState(kUsbIpRecvState_None);
944	}
945	}
946	break;
947	}
948	case kUsbIpRecvState_DeviceInterface:
949	{
950	/*
951	* If all interfaces for the current device were received receive the next device
952	* if there is another one left, if not we are done with the current request.
953	*/
954	m->cInterfacesLeft--;
955	if (m->cInterfacesLeft)
956	advanceState(kUsbIpRecvState_DeviceInterface);
957	else
958	{
959	m->cDevicesLeft--;
960	if (m->cDevicesLeft)
961	advanceState(kUsbIpRecvState_ExportedDevice);
962	else
963	advanceState(kUsbIpRecvState_None);
964	}
965	break;
966	}
967	case kUsbIpRecvState_None:
968	default:
969	AssertMsgFailed(("Invalid USB/IP receive state %d\n", m->enmRecvState));
970	return VERR_INVALID_STATE;
971	}
972
973	return vrc;
974	}
975
976	/**
977	* Creates a new USB device and adds it to the list.
978	*
979	* @returns VBox status code.
980	* @param pDev Pointer to the USB/IP exported device structure to take
981	* the information for the new device from.
982	*/
983	int USBProxyBackendUsbIp::addDeviceToList(PUsbIpExportedDevice pDev)
984	{
985	int vrc = VINF_SUCCESS;
986	PUSBDEVICE pNew = (PUSBDEVICE)RTMemAllocZ(sizeof(USBDEVICE));
987	if (!pNew)
988	return VERR_NO_MEMORY;
989
990	pNew->pszManufacturer = RTStrDup("");
991	pNew->pszProduct = RTStrDup("");
992	pNew->pszSerialNumber = NULL;
993	pNew->pszBackend = RTStrDup("usbip");
994
995	/* Make sure the Bus id is 0 terminated. */
996	pDev->szBusId[31] = '\0';
997	pNew->pszAddress = RTStrAPrintf2("usbip://%s:%u:%s", m->pszHost, m->uPort, &pDev->szBusId[0]);
998	if (RT_LIKELY(pNew->pszAddress))
999	{
1000	pNew->idVendor = pDev->u16VendorId;
1001	pNew->idProduct = pDev->u16ProductId;
1002	pNew->bcdDevice = pDev->u16BcdDevice;
1003	pNew->bDeviceClass = pDev->bDeviceClass;
1004	pNew->bDeviceSubClass = pDev->bDeviceSubClass;
1005	pNew->bDeviceProtocol = pDev->bDeviceProtocol;
1006	pNew->bNumConfigurations = pDev->bNumConfigurations;
1007	pNew->enmState = USBDEVICESTATE_USED_BY_HOST_CAPTURABLE;
1008	pNew->u64SerialHash = 0;
1009	/** @todo The following is not correct but is required to to get USB testing working
1010	* because only the port can be part of a filter (adding the required attributes for the bus
1011	* breaks API and ABI compatibility).
1012	* Filtering by port number is required for USB testing to connect to the correct device
1013	* in case there are multiple ones.
1014	*/
1015	pNew->bBus = (uint8_t)pDev->u32DevNum;
1016	pNew->bPort = (uint8_t)pDev->u32BusNum;
1017
1018	switch (pDev->u32Speed)
1019	{
1020	case USBIP_SPEED_LOW:
1021	pNew->enmSpeed = USBDEVICESPEED_LOW;
1022	pNew->bcdUSB = 1 << 8;
1023	break;
1024	case USBIP_SPEED_FULL:
1025	pNew->enmSpeed = USBDEVICESPEED_FULL;
1026	pNew->bcdUSB = 1 << 8;
1027	break;
1028	case USBIP_SPEED_HIGH:
1029	pNew->enmSpeed = USBDEVICESPEED_HIGH;
1030	pNew->bcdUSB = 2 << 8;
1031	break;
1032	case USBIP_SPEED_WIRELESS:
1033	pNew->enmSpeed = USBDEVICESPEED_VARIABLE;
1034	pNew->bcdUSB = 1 << 8;
1035	break;
1036	case USBIP_SPEED_SUPER:
1037	pNew->enmSpeed = USBDEVICESPEED_SUPER;
1038	pNew->bcdUSB = 3 << 8;
1039	break;
1040	case USBIP_SPEED_UNKNOWN:
1041	default:
1042	pNew->bcdUSB = 1 << 8;
1043	pNew->enmSpeed = USBDEVICESPEED_UNKNOWN;
1044	}
1045
1046	/* link it */
1047	pNew->pNext = NULL;
1048	pNew->pPrev = *m->ppNext;
1049	*m->ppNext = pNew;
1050	m->ppNext = &pNew->pNext;
1051	m->cDevicesCur++;
1052	}
1053	else
1054	vrc = VERR_NO_STR_MEMORY;
1055
1056	if (RT_FAILURE(vrc))
1057	{
1058	if (pNew->pszManufacturer)
1059	RTStrFree((char *)pNew->pszManufacturer);
1060	if (pNew->pszProduct)
1061	RTStrFree((char *)pNew->pszProduct);
1062	if (pNew->pszBackend)
1063	RTStrFree((char *)pNew->pszBackend);
1064	if (pNew->pszAddress)
1065	RTStrFree((char *)pNew->pszAddress);
1066	RTMemFree(pNew);
1067	}
1068
1069	return vrc;
1070	}
1071
1072	/**
1073	* Compares the given device list with the current one and returns whether it has
1074	* changed.
1075	*
1076	* @returns flag whether the device list has changed compared to the current one.
1077	* @param pDevices The device list to compare the current one against.
1078	*/
1079	bool USBProxyBackendUsbIp::hasDevListChanged(PUSBDEVICE pDevices)
1080	{
1081	/** @todo */
1082	NOREF(pDevices);
1083	return true;
1084	}
1085

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source: vbox/trunk/src/VBox/Main/src-server/generic/USBProxyBackendUsbIp.cpp@ 98288

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