VBoxNetAdp.c@ 47195

Last change on this file since 47195 was 44528, checked in by vboxsync, 12 years ago
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1	/* $Id: VBoxNetAdp.c 44528 2013-02-04 14:27:54Z vboxsync $ */
2	/** @file
3	* VBoxNetAdp - Virtual Network Adapter Driver (Host), Common Code.
4	*/
5
6	/*
7	* Copyright (C) 2008-2012 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	/** @page pg_netadp VBoxNetAdp - Network Adapter
19	*
20	* This is a kernel module that creates a virtual interface that can be attached
21	* to an internal network.
22	*
23	* In the big picture we're one of the three trunk interface on the internal
24	* network, the one named "TAP Interface": @image html Networking_Overview.gif
25	*
26	*/
27
28	/*******************************************************************************
29	* Header Files *
30	*******************************************************************************/
31	#define LOG_GROUP LOG_GROUP_NET_ADP_DRV
32	#include "VBoxNetAdpInternal.h"
33
34	#include <VBox/log.h>
35	#include <VBox/err.h>
36	#include <iprt/string.h>
37
38	#ifdef VBOXANETADP_DO_NOT_USE_NETFLT
39	#error "this code is broken"
40
41	#include <VBox/sup.h>
42	#include <iprt/assert.h>
43	#include <iprt/spinlock.h>
44	#include <iprt/uuid.h>
45	#include <VBox/version.h>
46
47	/** r=bird: why is this here in the agnostic code? */
48	#ifdef RT_OS_DARWIN
49	# include <net/ethernet.h>
50	# include <net/if_ether.h>
51	# include <net/if_types.h>
52	# include <sys/socket.h>
53	# include <net/if.h>
54	# include <net/if_dl.h>
55	# include <sys/errno.h>
56	# include <sys/param.h>
57	#endif
58
59
60	/*******************************************************************************
61	* Defined Constants And Macros *
62	*******************************************************************************/
63	#define IFPORT_2_VBOXNETADP(pIfPort) \
64	( (PVBOXNETADP)((uint8_t *)pIfPort - RT_OFFSETOF(VBOXNETADP, MyPort)) )
65
66
67	AssertCompileMemberSize(VBOXNETADP, enmState, sizeof(uint32_t));
68
69	/**
70	* Gets the enmState member atomically.
71	*
72	* Used for all reads.
73	*
74	* @returns The enmState value.
75	* @param pThis The instance.
76	*/
77	DECLINLINE(VBOXNETADPSTATE) vboxNetAdpGetState(PVBOXNETADP pThis)
78	{
79	return (VBOXNETADPSTATE)ASMAtomicUoReadU32((uint32_t volatile *)&pThis->enmState);
80	}
81
82
83	/**
84	* Sets the enmState member atomically.
85	*
86	* Used for all updates.
87	*
88	* @param pThis The instance.
89	* @param enmNewState The new value.
90	*/
91	DECLINLINE(void) vboxNetAdpSetState(PVBOXNETADP pThis, VBOXNETADPSTATE enmNewState)
92	{
93	Log(("vboxNetAdpSetState: pThis=%p, state change: %d -> %d.\n", pThis, vboxNetAdpGetState(pThis), enmNewState));
94	ASMAtomicWriteU32((uint32_t volatile *)&pThis->enmState, enmNewState);
95	}
96
97
98	/**
99	* Sets the enmState member atomically after first acquiring the spinlock.
100	*
101	* Used for all updates.
102	*
103	* @param pThis The instance.
104	* @param enmNewState The new value.
105	*/
106	DECLINLINE(void) vboxNetAdpSetStateWithLock(PVBOXNETADP pThis, VBOXNETADPSTATE enmNewState)
107	{
108	Log(("vboxNetAdpSetStateWithLock: pThis=%p, state=%d.\n", pThis, enmNewState));
109	RTSpinlockAcquire(pThis->hSpinlock);
110	vboxNetAdpSetState(pThis, enmNewState);
111	RTSpinlockReleaseNoInts(pThis->hSpinlock);
112	}
113
114
115	/**
116	* Gets the enmState member with locking.
117	*
118	* Used for all reads.
119	*
120	* @returns The enmState value.
121	* @param pThis The instance.
122	*/
123	DECLINLINE(VBOXNETADPSTATE) vboxNetAdpGetStateWithLock(PVBOXNETADP pThis)
124	{
125	VBOXNETADPSTATE enmState;
126	RTSpinlockAcquire(pThis->hSpinlock);
127	enmState = vboxNetAdpGetState(pThis);
128	RTSpinlockReleaseNoInts(pThis->hSpinlock);
129	Log(("vboxNetAdpGetStateWithLock: pThis=%p, state=%d.\n", pThis, enmState));
130	return enmState;
131	}
132
133
134	/**
135	* Checks and sets the enmState member atomically.
136	*
137	* Used for all updates.
138	*
139	* @returns true if the state has been changed.
140	* @param pThis The instance.
141	* @param enmNewState The new value.
142	*/
143	DECLINLINE(bool) vboxNetAdpCheckAndSetState(PVBOXNETADP pThis, VBOXNETADPSTATE enmOldState, VBOXNETADPSTATE enmNewState)
144	{
145	VBOXNETADPSTATE enmActualState;
146	bool fRc = true; /* be optimistic */
147
148	RTSpinlockAcquire(pThis->hSpinlock);
149	enmActualState = vboxNetAdpGetState(pThis); /** @todo r=bird: ASMAtomicCmpXchgU32()*/
150	if (enmActualState == enmOldState)
151	vboxNetAdpSetState(pThis, enmNewState);
152	else
153	fRc = false;
154	RTSpinlockReleaseNoInts(pThis->hSpinlock);
155
156	if (fRc)
157	Log(("vboxNetAdpCheckAndSetState: pThis=%p, state changed: %d -> %d.\n", pThis, enmOldState, enmNewState));
158	else
159	Log(("vboxNetAdpCheckAndSetState: pThis=%p, no state change: %d != %d (expected).\n", pThis, enmActualState, enmOldState));
160	return fRc;
161	}
162
163
164	/**
165	* Finds a instance by its name, the caller does the locking.
166	*
167	* @returns Pointer to the instance by the given name. NULL if not found.
168	* @param pGlobals The globals.
169	* @param pszName The name of the instance.
170	*/
171	static PVBOXNETADP vboxNetAdpFind(PVBOXNETADPGLOBALS pGlobals, const char *pszName)
172	{
173	unsigned i;
174
175	for (i = 0; i < RT_ELEMENTS(pGlobals->aAdapters); i++)
176	{
177	PVBOXNETADP pThis = &pGlobals->aAdapters[i];
178	RTSpinlockAcquire(pThis->hSpinlock);
179	if ( vboxNetAdpGetState(pThis)
180	&& !strcmp(pThis->szName, pszName))
181	{
182	RTSpinlockReleaseNoInts(pThis->hSpinlock);
183	return pThis;
184	}
185	RTSpinlockReleaseNoInts(pThis->hSpinlock);
186	}
187	return NULL;
188	}
189
190
191	/**
192	* Releases a reference to the specified instance.
193	*
194	* @param pThis The instance.
195	* @param fBusy Whether the busy counter should be decremented too.
196	*/
197	DECLHIDDEN(void) vboxNetAdpRelease(PVBOXNETADP pThis)
198	{
199	uint32_t cRefs;
200
201	/*
202	* Paranoid Android.
203	*/
204	AssertPtr(pThis);
205	Assert(pThis->MyPort.u32Version == INTNETTRUNKIFPORT_VERSION);
206	Assert(pThis->MyPort.u32VersionEnd == INTNETTRUNKIFPORT_VERSION);
207	Assert(vboxNetAdpGetState(pThis) > kVBoxNetAdpState_Invalid);
208	AssertPtr(pThis->pGlobals);
209	Assert(pThis->hEventIdle != NIL_RTSEMEVENT);
210	Assert(pThis->hSpinlock != NIL_RTSPINLOCK);
211	Assert(pThis->szName[0]);
212
213	/*
214	* The object reference counting.
215	*/
216	cRefs = ASMAtomicDecU32(&pThis->cRefs);
217	Assert(cRefs < UINT32_MAX / 2);
218	}
219
220
221	/**
222	* Decrements the busy counter and does idle wakeup.
223	*
224	* @param pThis The instance.
225	*/
226	DECLHIDDEN(void) vboxNetAdpIdle(PVBOXNETADP pThis)
227	{
228	uint32_t cBusy;
229
230	/*
231	* Paranoid Android.
232	*/
233	AssertPtr(pThis);
234	Assert(pThis->MyPort.u32Version == INTNETTRUNKIFPORT_VERSION);
235	Assert(pThis->MyPort.u32VersionEnd == INTNETTRUNKIFPORT_VERSION);
236	Assert(vboxNetAdpGetState(pThis) >= kVBoxNetAdpState_Connected);
237	AssertPtr(pThis->pGlobals);
238	Assert(pThis->hEventIdle != NIL_RTSEMEVENT);
239
240	cBusy = ASMAtomicDecU32(&pThis->cBusy);
241	if (!cBusy)
242	{
243	int rc = RTSemEventSignal(pThis->hEventIdle);
244	AssertRC(rc);
245	}
246	else
247	Assert(cBusy < UINT32_MAX / 2);
248	}
249
250
251	/**
252	* Retains a reference to the specified instance.
253	*
254	* @param pThis The instance.
255	*/
256	DECLHIDDEN(void) vboxNetAdpRetain(PVBOXNETADP pThis)
257	{
258	uint32_t cRefs;
259
260	/*
261	* Paranoid Android.
262	*/
263	AssertPtr(pThis);
264	Assert(pThis->MyPort.u32Version == INTNETTRUNKIFPORT_VERSION);
265	Assert(pThis->MyPort.u32VersionEnd == INTNETTRUNKIFPORT_VERSION);
266	Assert(vboxNetAdpGetState(pThis) > kVBoxNetAdpState_Invalid);
267	AssertPtr(pThis->pGlobals);
268	Assert(pThis->hEventIdle != NIL_RTSEMEVENT);
269	Assert(pThis->hSpinlock != NIL_RTSPINLOCK);
270	Assert(pThis->szName[0]);
271
272	/*
273	* Retain the object.
274	*/
275	cRefs = ASMAtomicIncU32(&pThis->cRefs);
276	Assert(cRefs > 1 && cRefs < UINT32_MAX / 2);
277
278	NOREF(cRefs);
279	}
280
281
282	/**
283	* Increments busy counter.
284	*
285	* @param pThis The instance.
286	*/
287	DECLHIDDEN(void) vboxNetAdpBusy(PVBOXNETADP pThis)
288	{
289	uint32_t cBusy;
290
291	/*
292	* Are we vigilant enough?
293	*/
294	AssertPtr(pThis);
295	Assert(pThis->MyPort.u32Version == INTNETTRUNKIFPORT_VERSION);
296	Assert(pThis->MyPort.u32VersionEnd == INTNETTRUNKIFPORT_VERSION);
297	Assert(vboxNetAdpGetState(pThis) >= kVBoxNetAdpState_Connected);
298	AssertPtr(pThis->pGlobals);
299	Assert(pThis->hEventIdle != NIL_RTSEMEVENT);
300	cBusy = ASMAtomicIncU32(&pThis->cBusy);
301	Assert(cBusy > 0 && cBusy < UINT32_MAX / 2);
302
303	NOREF(cBusy);
304	}
305
306
307	/**
308	* Generate a suitable MAC address.
309	*
310	* @param pThis The instance.
311	* @param pMac Where to return the MAC address.
312	*/
313	DECLHIDDEN(void) vboxNetAdpComposeMACAddress(PVBOXNETADP pThis, PRTMAC pMac)
314	{
315	#if 0 /* Use a locally administered version of the OUI we use for the guest NICs. */
316	pMac->au8[0] = 0x08 \| 2;
317	pMac->au8[1] = 0x00;
318	pMac->au8[2] = 0x27;
319	#else /* this is what \0vb comes down to. It seems to be unassigned atm. */
320	pMac->au8[0] = 0;
321	pMac->au8[1] = 0x76;
322	pMac->au8[2] = 0x62;
323	#endif
324
325	pMac->au8[3] = 0; /* pThis->uUnit >> 16; */
326	pMac->au8[4] = 0; /* pThis->uUnit >> 8; */
327	pMac->au8[5] = pThis->uUnit;
328	}
329
330
331	/**
332	* Checks if receive is possible and increases busy and ref counters if so.
333	*
334	* @param pThis The instance.
335	*/
336	DECLHIDDEN(bool) vboxNetAdpPrepareToReceive(PVBOXNETADP pThis)
337	{
338	bool fCanReceive = false;
339	/*
340	* Input validation.
341	*/
342	AssertPtr(pThis);
343	Assert(pThis->MyPort.u32Version == INTNETTRUNKIFPORT_VERSION);
344	RTSpinlockAcquire(pThis->hSpinlock);
345	if (vboxNetAdpGetState(pThis) == kVBoxNetAdpState_Active)
346	{
347	fCanReceive = true;
348	vboxNetAdpRetain(pThis);
349	vboxNetAdpBusy(pThis);
350	}
351	RTSpinlockReleaseNoInts(pThis->hSpinlock);
352	Log(("vboxNetAdpPrepareToReceive: fCanReceive=%d.\n", fCanReceive));
353
354	return fCanReceive;
355	}
356
357
358	/**
359	* Forwards scatter/gather list to internal network and decreases busy and ref counters.
360	*
361	* @param pThis The instance.
362	*/
363	DECLHIDDEN(void) vboxNetAdpReceive(PVBOXNETADP pThis, PINTNETSG pSG)
364	{
365	/*
366	* Input validation.
367	*/
368	AssertPtr(pThis);
369	AssertPtr(pSG);
370	AssertPtr(pThis->pSwitchPort);
371	Assert(pThis->MyPort.u32Version == INTNETTRUNKIFPORT_VERSION);
372	Log(("vboxNetAdpReceive: forwarding packet to internal net...\n"));
373	pThis->pSwitchPort->pfnRecv(pThis->pSwitchPort, pSG, INTNETTRUNKDIR_HOST);
374	vboxNetAdpIdle(pThis);
375	vboxNetAdpRelease(pThis);
376	}
377
378
379	/**
380	* Decreases busy and ref counters.
381	*
382	* @param pThis The instance.
383	*/
384	DECLHIDDEN(void) vboxNetAdpCancelReceive(PVBOXNETADP pThis)
385	{
386	Log(("vboxNetAdpCancelReceive: cancelled.\n"));
387	vboxNetAdpIdle(pThis);
388	vboxNetAdpRelease(pThis);
389	}
390
391
392	/**
393	* @copydoc INTNETTRUNKIFPORT::pfnXmit
394	*/
395	static DECLCALLBACK(int) vboxNetAdpPortXmit(PINTNETTRUNKIFPORT pIfPort, PINTNETSG pSG, uint32_t fDst)
396	{
397	PVBOXNETADP pThis = IFPORT_2_VBOXNETADP(pIfPort);
398	int rc = VINF_SUCCESS;
399
400	/*
401	* Input validation.
402	*/
403	AssertPtr(pThis);
404	AssertPtr(pSG);
405	Assert(pThis->MyPort.u32Version == INTNETTRUNKIFPORT_VERSION);
406
407	Log(("vboxNetAdpPortXmit: outgoing packet (len=%d)\n", pSG->cbTotal));
408
409	/*
410	* Do a retain/busy, invoke the OS specific code.
411	*/
412	RTSpinlockAcquire(pThis->hSpinlock);
413	if (vboxNetAdpGetState(pThis) != kVBoxNetAdpState_Active)
414	{
415	RTSpinlockReleaseNoInts(pThis->hSpinlock);
416	Log(("vboxNetAdpReceive: Dropping incoming packet for inactive interface %s.\n",
417	pThis->szName));
418	return VERR_INVALID_STATE;
419	}
420	vboxNetAdpRetain(pThis);
421	vboxNetAdpBusy(pThis);
422	RTSpinlockReleaseNoInts(pThis->hSpinlock);
423
424	rc = vboxNetAdpPortOsXmit(pThis, pSG, fDst);
425	vboxNetAdpIdle(pThis);
426	vboxNetAdpRelease(pThis);
427
428	return rc;
429	}
430
431
432	/**
433	* @copydoc INTNETTRUNKIFPORT::pfnGetMacAddress
434	*/
435	static DECLCALLBACK(void) vboxNetAdpPortGetMacAddress(PINTNETTRUNKIFPORT pIfPort, PRTMAC pMac)
436	{
437	PVBOXNETADP pThis = IFPORT_2_VBOXNETADP(pIfPort);
438
439	/*
440	* Input validation.
441	*/
442	AssertPtr(pThis);
443	Assert(pThis->MyPort.u32Version == INTNETTRUNKIFPORT_VERSION);
444	Assert(vboxNetAdpGetStateWithLock(pThis) == kVBoxNetAdpState_Active);
445
446	/*
447	* Forward the question to the OS specific code.
448	*/
449	vboxNetAdpPortOsGetMacAddress(pThis, pMac);
450	}
451
452
453	/**
454	* @copydoc INTNETTRUNKIFPORT::pfnWaitForIdle
455	*/
456	static DECLCALLBACK(int) vboxNetAdpPortWaitForIdle(PINTNETTRUNKIFPORT pIfPort, uint32_t cMillies)
457	{
458	int rc;
459	PVBOXNETADP pThis = IFPORT_2_VBOXNETADP(pIfPort);
460
461	/*
462	* Input validation.
463	*/
464	AssertPtr(pThis);
465	Assert(pThis->MyPort.u32Version == INTNETTRUNKIFPORT_VERSION);
466	AssertReturn(vboxNetAdpGetStateWithLock(pThis) >= kVBoxNetAdpState_Connected, VERR_INVALID_STATE);
467
468	/*
469	* Go to sleep on the semaphore after checking the busy count.
470	*/
471	vboxNetAdpRetain(pThis);
472
473	rc = VINF_SUCCESS;
474	while (pThis->cBusy && RT_SUCCESS(rc))
475	rc = RTSemEventWait(pThis->hEventIdle, cMillies); /** @todo make interruptible? */
476
477	vboxNetAdpRelease(pThis);
478
479	return rc;
480	}
481
482
483	/**
484	* @copydoc INTNETTRUNKIFPORT::pfnSetActive
485	*/
486	static DECLCALLBACK(bool) vboxNetAdpPortSetActive(PINTNETTRUNKIFPORT pIfPort, bool fActive)
487	{
488	bool fPreviouslyActive;
489	PVBOXNETADP pThis = IFPORT_2_VBOXNETADP(pIfPort);
490
491	/*
492	* Input validation.
493	*/
494	AssertPtr(pThis);
495	AssertPtr(pThis->pGlobals);
496	Assert(pThis->MyPort.u32Version == INTNETTRUNKIFPORT_VERSION);
497
498	Log(("vboxNetAdpPortSetActive: pThis=%p, fActive=%d, state before: %d.\n", pThis, fActive, vboxNetAdpGetState(pThis)));
499	RTSpinlockAcquire(pThis->hSpinlock);
500
501	fPreviouslyActive = vboxNetAdpGetState(pThis) == kVBoxNetAdpState_Active;
502	if (fPreviouslyActive != fActive)
503	{
504	switch (vboxNetAdpGetState(pThis))
505	{
506	case kVBoxNetAdpState_Connected:
507	vboxNetAdpSetState(pThis, kVBoxNetAdpState_Active);
508	break;
509	case kVBoxNetAdpState_Active:
510	vboxNetAdpSetState(pThis, kVBoxNetAdpState_Connected);
511	break;
512	default:
513	break;
514	}
515	}
516
517	RTSpinlockReleaseNoInts(pThis->hSpinlock);
518	Log(("vboxNetAdpPortSetActive: state after: %RTbool.\n", vboxNetAdpGetState(pThis)));
519	return fPreviouslyActive;
520	}
521
522
523	/**
524	* @copydoc INTNETTRUNKIFPORT::pfnDisconnectAndRelease
525	*/
526	static DECLCALLBACK(void) vboxNetAdpPortDisconnectAndRelease(PINTNETTRUNKIFPORT pIfPort)
527	{
528	PVBOXNETADP pThis = IFPORT_2_VBOXNETADP(pIfPort);
529
530	/*
531	* Serious paranoia.
532	*/
533	AssertPtr(pThis);
534	Assert(pThis->MyPort.u32Version == INTNETTRUNKIFPORT_VERSION);
535	Assert(pThis->MyPort.u32VersionEnd == INTNETTRUNKIFPORT_VERSION);
536	AssertPtr(pThis->pGlobals);
537	Assert(pThis->hEventIdle != NIL_RTSEMEVENT);
538	Assert(pThis->hSpinlock != NIL_RTSPINLOCK);
539
540
541	/*
542	* Disconnect and release it.
543	*/
544	RTSpinlockAcquire(pThis->hSpinlock);
545	//Assert(vboxNetAdpGetState(pThis) == kVBoxNetAdpState_Connected);
546	Assert(!pThis->cBusy);
547	vboxNetAdpSetState(pThis, kVBoxNetAdpState_Transitional);
548	RTSpinlockReleaseNoInts(pThis->hSpinlock);
549
550	vboxNetAdpOsDisconnectIt(pThis);
551	pThis->pSwitchPort = NULL;
552
553	RTSpinlockAcquire(pThis->hSpinlock);
554	vboxNetAdpSetState(pThis, kVBoxNetAdpState_Available);
555	RTSpinlockReleaseNoInts(pThis->hSpinlock);
556
557	vboxNetAdpRelease(pThis);
558	}
559
560
561	/**
562	* @copydoc INTNETTRUNKIFPORT::pfnRelease
563	*/
564	static DECLCALLBACK(void) vboxNetAdpPortRelease(PINTNETTRUNKIFPORT pIfPort)
565	{
566	PVBOXNETADP pThis = IFPORT_2_VBOXNETADP(pIfPort);
567	vboxNetAdpRelease(pThis);
568	}
569
570
571	/**
572	* @copydoc INTNETTRUNKIFPORT::pfnRetain
573	*/
574	static DECLCALLBACK(void) vboxNetAdpPortRetain(PINTNETTRUNKIFPORT pIfPort)
575	{
576	PVBOXNETADP pThis = IFPORT_2_VBOXNETADP(pIfPort);
577	vboxNetAdpRetain(pThis);
578	}
579
580
581	int vboxNetAdpCreate(PINTNETTRUNKFACTORY pIfFactory, PVBOXNETADP *ppNew)
582	{
583	PVBOXNETADPGLOBALS pGlobals = (PVBOXNETADPGLOBALS)((uint8_t *)pIfFactory - RT_OFFSETOF(VBOXNETADPGLOBALS, TrunkFactory));
584	unsigned i;
585	int rc;
586
587	for (i = 0; i < RT_ELEMENTS(pGlobals->aAdapters); i++)
588	{
589	PVBOXNETADP pThis = &pGlobals->aAdapters[i];
590
591	if (vboxNetAdpCheckAndSetState(pThis, kVBoxNetAdpState_Invalid, kVBoxNetAdpState_Transitional))
592	{
593	/* Found an empty slot -- use it. */
594	uint32_t cRefs = ASMAtomicIncU32(&pThis->cRefs);
595	Assert(cRefs == 1);
596	RTMAC Mac;
597	vboxNetAdpComposeMACAddress(pThis, &Mac);
598	rc = vboxNetAdpOsCreate(pThis, &Mac);
599	*ppNew = pThis;
600
601	RTSpinlockAcquire(pThis->hSpinlock);
602	vboxNetAdpSetState(pThis, kVBoxNetAdpState_Available);
603	RTSpinlockReleaseNoInts(pThis->hSpinlock);
604	return rc;
605	}
606	}
607
608	/* All slots in adapter array are busy. */
609	return VERR_OUT_OF_RESOURCES;
610	}
611
612	int vboxNetAdpDestroy(PVBOXNETADP pThis)
613	{
614	int rc = VINF_SUCCESS;
615
616	RTSpinlockAcquire(pThis->hSpinlock);
617	if (vboxNetAdpGetState(pThis) != kVBoxNetAdpState_Available \|\| pThis->cBusy)
618	{
619	RTSpinlockReleaseNoInts(pThis->hSpinlock);
620	return VERR_INTNET_FLT_IF_BUSY;
621	}
622	vboxNetAdpSetState(pThis, kVBoxNetAdpState_Transitional);
623	RTSpinlockReleaseNoInts(pThis->hSpinlock);
624	vboxNetAdpRelease(pThis);
625
626	vboxNetAdpOsDestroy(pThis);
627
628	RTSpinlockAcquire(pThis->hSpinlock);
629	vboxNetAdpSetState(pThis, kVBoxNetAdpState_Invalid);
630	RTSpinlockReleaseNoInts(pThis->hSpinlock);
631
632	return rc;
633	}
634
635	/**
636	* Connects the instance to the specified switch port.
637	*
638	* Called while owning the lock. We're ASSUMING that the internal
639	* networking code is already owning an recursive mutex, so, there
640	* will be no deadlocks when vboxNetAdpOsConnectIt calls back into
641	* it for setting preferences.
642	*
643	* @returns VBox status code.
644	* @param pThis The instance.
645	* @param pSwitchPort The port on the internal network 'switch'.
646	* @param ppIfPort Where to return our port interface.
647	*/
648	static int vboxNetAdpConnectIt(PVBOXNETADP pThis, PINTNETTRUNKSWPORT pSwitchPort, PINTNETTRUNKIFPORT *ppIfPort)
649	{
650	int rc;
651
652	/*
653	* Validate state.
654	*/
655	Assert(!pThis->cBusy);
656	Assert(vboxNetAdpGetStateWithLock(pThis) == kVBoxNetAdpState_Transitional);
657
658	/*
659	* Do the job.
660	* Note that we're calling the os stuff while owning the semaphore here.
661	*/
662	pThis->pSwitchPort = pSwitchPort;
663	rc = vboxNetAdpOsConnectIt(pThis);
664	if (RT_SUCCESS(rc))
665	{
666	*ppIfPort = &pThis->MyPort;
667	}
668	else
669	pThis->pSwitchPort = NULL;
670
671	return rc;
672	}
673
674
675	/**
676	* @copydoc INTNETTRUNKFACTORY::pfnCreateAndConnect
677	*/
678	static DECLCALLBACK(int) vboxNetAdpFactoryCreateAndConnect(PINTNETTRUNKFACTORY pIfFactory, const char *pszName,
679	PINTNETTRUNKSWPORT pSwitchPort, uint32_t fFlags,
680	PINTNETTRUNKIFPORT *ppIfPort)
681	{
682	PVBOXNETADPGLOBALS pGlobals = (PVBOXNETADPGLOBALS)((uint8_t *)pIfFactory - RT_OFFSETOF(VBOXNETADPGLOBALS, TrunkFactory));
683	PVBOXNETADP pThis;
684	int rc;
685
686	LogFlow(("vboxNetAdpFactoryCreateAndConnect: pszName=%p:{%s} fFlags=%#x\n", pszName, pszName, fFlags));
687	Assert(pGlobals->cFactoryRefs > 0);
688	AssertMsgReturn(!fFlags,
689	("%#x\n", fFlags), VERR_INVALID_PARAMETER);
690
691	/*
692	* Find instance, check if busy, connect if not.
693	*/
694	pThis = vboxNetAdpFind(pGlobals, pszName);
695	if (pThis)
696	{
697	if (vboxNetAdpCheckAndSetState(pThis, kVBoxNetAdpState_Available, kVBoxNetAdpState_Transitional))
698	{
699	vboxNetAdpRetain(pThis);
700	rc = vboxNetAdpConnectIt(pThis, pSwitchPort, ppIfPort);
701	vboxNetAdpSetStateWithLock(pThis, RT_SUCCESS(rc) ? kVBoxNetAdpState_Connected : kVBoxNetAdpState_Available);
702	}
703	else
704	rc = VERR_INTNET_FLT_IF_BUSY;
705	}
706	else
707	rc = VERR_INTNET_FLT_IF_NOT_FOUND;
708
709	return rc;
710	}
711
712
713	/**
714	* @copydoc INTNETTRUNKFACTORY::pfnRelease
715	*/
716	static DECLCALLBACK(void) vboxNetAdpFactoryRelease(PINTNETTRUNKFACTORY pIfFactory)
717	{
718	PVBOXNETADPGLOBALS pGlobals = (PVBOXNETADPGLOBALS)((uint8_t *)pIfFactory - RT_OFFSETOF(VBOXNETADPGLOBALS, TrunkFactory));
719
720	int32_t cRefs = ASMAtomicDecS32(&pGlobals->cFactoryRefs);
721	Assert(cRefs >= 0); NOREF(cRefs);
722	LogFlow(("vboxNetAdpFactoryRelease: cRefs=%d (new)\n", cRefs));
723	}
724
725
726	/**
727	* Implements the SUPDRV component factor interface query method.
728	*
729	* @returns Pointer to an interface. NULL if not supported.
730	*
731	* @param pSupDrvFactory Pointer to the component factory registration structure.
732	* @param pSession The session - unused.
733	* @param pszInterfaceUuid The factory interface id.
734	*/
735	static DECLCALLBACK(void ) vboxNetAdpQueryFactoryInterface(PCSUPDRVFACTORY pSupDrvFactory, PSUPDRVSESSION pSession, const char pszInterfaceUuid)
736	{
737	PVBOXNETADPGLOBALS pGlobals = (PVBOXNETADPGLOBALS)((uint8_t *)pSupDrvFactory - RT_OFFSETOF(VBOXNETADPGLOBALS, SupDrvFactory));
738
739	/*
740	* Convert the UUID strings and compare them.
741	*/
742	RTUUID UuidReq;
743	int rc = RTUuidFromStr(&UuidReq, pszInterfaceUuid);
744	if (RT_SUCCESS(rc))
745	{
746	if (!RTUuidCompareStr(&UuidReq, INTNETTRUNKFACTORY_UUID_STR))
747	{
748	ASMAtomicIncS32(&pGlobals->cFactoryRefs);
749	return &pGlobals->TrunkFactory;
750	}
751	#ifdef LOG_ENABLED
752	else
753	Log(("VBoxNetAdp: unknown factory interface query (%s)\n", pszInterfaceUuid));
754	#endif
755	}
756	else
757	Log(("VBoxNetAdp: rc=%Rrc, uuid=%s\n", rc, pszInterfaceUuid));
758
759	return NULL;
760	}
761
762
763	/**
764	* Checks whether the VBoxNetAdp wossname can be unloaded.
765	*
766	* This will return false if someone is currently using the module.
767	*
768	* @returns true if it's relatively safe to unload it, otherwise false.
769	* @param pGlobals Pointer to the globals.
770	*/
771	DECLHIDDEN(bool) vboxNetAdpCanUnload(PVBOXNETADPGLOBALS pGlobals)
772	{
773	bool fRc = true; /* Assume it can be unloaded. */
774	unsigned i;
775
776	for (i = 0; i < RT_ELEMENTS(pGlobals->aAdapters); i++)
777	{
778	PVBOXNETADP pThis = &pGlobals->aAdapters[i];
779	if (vboxNetAdpGetStateWithLock(&pGlobals->aAdapters[i]) >= kVBoxNetAdpState_Connected)
780	{
781	fRc = false;
782	break; /* We already know the answer. */
783	}
784	}
785	return fRc && ASMAtomicUoReadS32((int32_t volatile *)&pGlobals->cFactoryRefs) <= 0;
786	}
787
788	/**
789	* tries to deinitialize Idc
790	* we separate the globals settings "base" which is actually
791	* "general" globals settings except for Idc, and idc.
792	* This is needed for windows filter driver, which gets loaded prior to VBoxDrv,
793	* thus it's not possible to make idc initialization from the driver startup routine for it,
794	* though the "base is still needed for the driver to functions".
795	* @param pGlobals
796	* @return VINF_SUCCESS on success, VERR_WRONG_ORDER if we're busy.
797	*/
798	DECLHIDDEN(int) vboxNetAdpTryDeleteIdc(PVBOXNETADPGLOBALS pGlobals)
799	{
800	int rc;
801
802	Assert(pGlobals->hFastMtx != NIL_RTSEMFASTMUTEX);
803
804	/*
805	* Check before trying to deregister the factory.
806	*/
807	if (!vboxNetAdpCanUnload(pGlobals))
808	return VERR_WRONG_ORDER;
809
810	/*
811	* Disconnect from SUPDRV and check that nobody raced us,
812	* reconnect if that should happen.
813	*/
814	rc = SUPR0IdcComponentDeregisterFactory(&pGlobals->SupDrvIDC, &pGlobals->SupDrvFactory);
815	AssertRC(rc);
816	if (!vboxNetAdpCanUnload(pGlobals))
817	{
818	rc = SUPR0IdcComponentRegisterFactory(&pGlobals->SupDrvIDC, &pGlobals->SupDrvFactory);
819	AssertRC(rc);
820	return VERR_WRONG_ORDER;
821	}
822
823	SUPR0IdcClose(&pGlobals->SupDrvIDC);
824
825	return rc;
826	}
827
828	static int vboxNetAdpSlotCreate(PVBOXNETADPGLOBALS pGlobals, unsigned uUnit, PVBOXNETADP pNew)
829	{
830	int rc;
831
832	pNew->MyPort.u32Version = INTNETTRUNKIFPORT_VERSION;
833	pNew->MyPort.pfnRetain = vboxNetAdpPortRetain;
834	pNew->MyPort.pfnRelease = vboxNetAdpPortRelease;
835	pNew->MyPort.pfnDisconnectAndRelease= vboxNetAdpPortDisconnectAndRelease;
836	pNew->MyPort.pfnSetState = vboxNetAdpPortSetState;
837	pNew->MyPort.pfnWaitForIdle = vboxNetAdpPortWaitForIdle;
838	pNew->MyPort.pfnXmit = vboxNetAdpPortXmit;
839	pNew->MyPort.u32VersionEnd = INTNETTRUNKIFPORT_VERSION;
840	pNew->pSwitchPort = NULL;
841	pNew->pGlobals = pGlobals;
842	pNew->hSpinlock = NIL_RTSPINLOCK;
843	pNew->enmState = kVBoxNetAdpState_Invalid;
844	pNew->cRefs = 0;
845	pNew->cBusy = 0;
846	pNew->hEventIdle = NIL_RTSEMEVENT;
847
848	rc = RTSpinlockCreate(&pNew->hSpinlock, RTSPINLOCK_FLAGS_INTERRUPT_SAFE, "VBoxNetAdptSlotCreate");
849	if (RT_SUCCESS(rc))
850	{
851	rc = RTSemEventCreate(&pNew->hEventIdle);
852	if (RT_SUCCESS(rc))
853	{
854	rc = vboxNetAdpOsInit(pNew);
855	if (RT_SUCCESS(rc))
856	{
857	return rc;
858	}
859	RTSemEventDestroy(pNew->hEventIdle);
860	pNew->hEventIdle = NIL_RTSEMEVENT;
861	}
862	RTSpinlockDestroy(pNew->hSpinlock);
863	pNew->hSpinlock = NIL_RTSPINLOCK;
864	}
865	return rc;
866	}
867
868	static void vboxNetAdpSlotDestroy(PVBOXNETADP pThis)
869	{
870	Assert(pThis->cRefs == 0);
871	Assert(pThis->cBusy == 0);
872	Assert(vboxNetAdpGetState(pThis) == kVBoxNetAdpState_Invalid);
873	if (pThis->hEventIdle != NIL_RTSEMEVENT)
874	{
875	RTSemEventDestroy(pThis->hEventIdle);
876	pThis->hEventIdle = NIL_RTSEMEVENT;
877	}
878	if (pThis->hSpinlock != NIL_RTSPINLOCK)
879	{
880	RTSpinlockDestroy(pThis->hSpinlock);
881	pThis->hSpinlock = NIL_RTSPINLOCK;
882	}
883	}
884
885	/**
886	* performs "base" globals deinitialization
887	* we separate the globals settings "base" which is actually
888	* "general" globals settings except for Idc, and idc.
889	* This is needed for windows filter driver, which gets loaded prior to VBoxDrv,
890	* thus it's not possible to make idc initialization from the driver startup routine for it,
891	* though the "base is still needed for the driver to functions".
892	* @param pGlobals
893	* @return none
894	*/
895	DECLHIDDEN(void) vboxNetAdpDeleteGlobalsBase(PVBOXNETADPGLOBALS pGlobals)
896	{
897	int i;
898	/*
899	* Release resources.
900	*/
901	for (i = 0; i < (int)RT_ELEMENTS(pGlobals->aAdapters); i++)
902	if (RT_SUCCESS(vboxNetAdpDestroy(&pGlobals->aAdapters[i])))
903	vboxNetAdpSlotDestroy(&pGlobals->aAdapters[i]);
904
905	RTSemFastMutexDestroy(pGlobals->hFastMtx);
906	pGlobals->hFastMtx = NIL_RTSEMFASTMUTEX;
907
908	#ifdef VBOXNETADP_STATIC_CONFIG
909	RTSemEventDestroy(pGlobals->hTimerEvent);
910	pGlobals->hTimerEvent = NIL_RTSEMEVENT;
911	#endif
912
913	}
914
915
916	/**
917	* Called by the native part when the OS wants the driver to unload.
918	*
919	* @returns VINF_SUCCESS on success, VERR_WRONG_ORDER if we're busy.
920	*
921	* @param pGlobals Pointer to the globals.
922	*/
923	DECLHIDDEN(int) vboxNetAdpTryDeleteGlobals(PVBOXNETADPGLOBALS pGlobals)
924	{
925	int rc = vboxNetAdpTryDeleteIdc(pGlobals);
926	if (RT_SUCCESS(rc))
927	{
928	vboxNetAdpDeleteGlobalsBase(pGlobals);
929	}
930	return rc;
931	}
932
933
934	/**
935	* performs the "base" globals initialization
936	* we separate the globals initialization to globals "base" initialization which is actually
937	* "general" globals initialization except for Idc not being initialized, and idc initialization.
938	* This is needed for windows filter driver, which gets loaded prior to VBoxDrv,
939	* thus it's not possible to make idc initialization from the driver startup routine for it.
940	*
941	* @returns VBox status code.
942	* @param pGlobals Pointer to the globals. */
943	DECLHIDDEN(int) vboxNetAdpInitGlobalsBase(PVBOXNETADPGLOBALS pGlobals)
944	{
945	/*
946	* Initialize the common portions of the structure.
947	*/
948	int i;
949	int rc = RTSemFastMutexCreate(&pGlobals->hFastMtx);
950	if (RT_SUCCESS(rc))
951	{
952	memset(pGlobals->aAdapters, 0, sizeof(pGlobals->aAdapters));
953	for (i = 0; i < (int)RT_ELEMENTS(pGlobals->aAdapters); i++)
954	{
955	rc = vboxNetAdpSlotCreate(pGlobals, i, &pGlobals->aAdapters[i]);
956	if (RT_FAILURE(rc))
957	{
958	/* Clean up. */
959	while (--i >= 0)
960	vboxNetAdpSlotDestroy(&pGlobals->aAdapters[i]);
961	Log(("vboxNetAdpInitGlobalsBase: Failed to create fast mutex (rc=%Rrc).\n", rc));
962	RTSemFastMutexDestroy(pGlobals->hFastMtx);
963	return rc;
964	}
965	}
966	pGlobals->TrunkFactory.pfnRelease = vboxNetAdpFactoryRelease;
967	pGlobals->TrunkFactory.pfnCreateAndConnect = vboxNetAdpFactoryCreateAndConnect;
968
969	strcpy(pGlobals->SupDrvFactory.szName, "VBoxNetAdp");
970	pGlobals->SupDrvFactory.pfnQueryFactoryInterface = vboxNetAdpQueryFactoryInterface;
971	}
972
973	return rc;
974	}
975
976	/**
977	* performs the Idc initialization
978	* we separate the globals initialization to globals "base" initialization which is actually
979	* "general" globals initialization except for Idc not being initialized, and idc initialization.
980	* This is needed for windows filter driver, which gets loaded prior to VBoxDrv,
981	* thus it's not possible to make idc initialization from the driver startup routine for it.
982	*
983	* @returns VBox status code.
984	* @param pGlobals Pointer to the globals. */
985	DECLHIDDEN(int) vboxNetAdpInitIdc(PVBOXNETADPGLOBALS pGlobals)
986	{
987	int rc;
988	/*
989	* Establish a connection to SUPDRV and register our component factory.
990	*/
991	rc = SUPR0IdcOpen(&pGlobals->SupDrvIDC, 0 /* iReqVersion = default /, 0 / iMinVersion = default */, NULL, NULL, NULL);
992	if (RT_SUCCESS(rc))
993	{
994	rc = SUPR0IdcComponentRegisterFactory(&pGlobals->SupDrvIDC, &pGlobals->SupDrvFactory);
995	if (RT_SUCCESS(rc))
996	{
997	#if 1 /** @todo REMOVE ME! */
998	PVBOXNETADP pTmp;
999	rc = vboxNetAdpCreate(&pGlobals->TrunkFactory, &pTmp);
1000	if (RT_FAILURE(rc))
1001	Log(("Failed to create vboxnet0, rc=%Rrc.\n", rc));
1002	#endif
1003	Log(("VBoxNetAdp: pSession=%p\n", SUPR0IdcGetSession(&pGlobals->SupDrvIDC)));
1004	return rc;
1005	}
1006
1007	/* bail out. */
1008	LogRel(("VBoxNetAdp: Failed to register component factory, rc=%Rrc\n", rc));
1009	SUPR0IdcClose(&pGlobals->SupDrvIDC);
1010	}
1011
1012	return rc;
1013	}
1014
1015	/**
1016	* Called by the native driver/kext module initialization routine.
1017	*
1018	* It will initialize the common parts of the globals, assuming the caller
1019	* has already taken care of the OS specific bits.
1020	*
1021	* @returns VBox status code.
1022	* @param pGlobals Pointer to the globals.
1023	*/
1024	DECLHIDDEN(int) vboxNetAdpInitGlobals(PVBOXNETADPGLOBALS pGlobals)
1025	{
1026	/*
1027	* Initialize the common portions of the structure.
1028	*/
1029	int rc = vboxNetAdpInitGlobalsBase(pGlobals);
1030	if (RT_SUCCESS(rc))
1031	{
1032	rc = vboxNetAdpInitIdc(pGlobals);
1033	if (RT_SUCCESS(rc))
1034	{
1035	return rc;
1036	}
1037
1038	/* bail out. */
1039	vboxNetAdpDeleteGlobalsBase(pGlobals);
1040	}
1041
1042	return rc;
1043	}
1044
1045	#else /* !VBOXANETADP_DO_NOT_USE_NETFLT */
1046
1047
1048	VBOXNETADP g_aAdapters[VBOXNETADP_MAX_INSTANCES];
1049	static uint8_t g_aUnits[VBOXNETADP_MAX_UNITS/8];
1050
1051
1052	DECLINLINE(int) vboxNetAdpGetUnitByName(const char *pcszName)
1053	{
1054	uint32_t iUnit = RTStrToUInt32(pcszName + sizeof(VBOXNETADP_NAME) - 1);
1055	bool fOld;
1056
1057	if (iUnit >= VBOXNETADP_MAX_UNITS)
1058	return -1;
1059
1060	fOld = ASMAtomicBitTestAndSet(g_aUnits, iUnit);
1061	return fOld ? -1 : (int)iUnit;
1062	}
1063
1064	DECLINLINE(int) vboxNetAdpGetNextAvailableUnit(void)
1065	{
1066	bool fOld;
1067	int iUnit;
1068	/* There is absolutely no chance that all units are taken */
1069	do {
1070	iUnit = ASMBitFirstClear(g_aUnits, VBOXNETADP_MAX_UNITS);
1071	if (iUnit < 0)
1072	break;
1073	fOld = ASMAtomicBitTestAndSet(g_aUnits, iUnit);
1074	} while (fOld);
1075
1076	return iUnit;
1077	}
1078
1079	DECLINLINE(void) vboxNetAdpReleaseUnit(int iUnit)
1080	{
1081	bool fSet = ASMAtomicBitTestAndClear(g_aUnits, iUnit);
1082	NOREF(fSet);
1083	Assert(fSet);
1084	}
1085
1086	/**
1087	* Generate a suitable MAC address.
1088	*
1089	* @param pThis The instance.
1090	* @param pMac Where to return the MAC address.
1091	*/
1092	DECLHIDDEN(void) vboxNetAdpComposeMACAddress(PVBOXNETADP pThis, PRTMAC pMac)
1093	{
1094	/* Use a locally administered version of the OUI we use for the guest NICs. */
1095	pMac->au8[0] = 0x08 \| 2;
1096	pMac->au8[1] = 0x00;
1097	pMac->au8[2] = 0x27;
1098
1099	pMac->au8[3] = 0; /* pThis->iUnit >> 16; */
1100	pMac->au8[4] = 0; /* pThis->iUnit >> 8; */
1101	pMac->au8[5] = pThis->iUnit;
1102	}
1103
1104	int vboxNetAdpCreate(PVBOXNETADP ppNew, const char pcszName)
1105	{
1106	int rc;
1107	unsigned i;
1108	for (i = 0; i < RT_ELEMENTS(g_aAdapters); i++)
1109	{
1110	PVBOXNETADP pThis = &g_aAdapters[i];
1111
1112	if (ASMAtomicCmpXchgU32((uint32_t volatile *)&pThis->enmState, kVBoxNetAdpState_Transitional, kVBoxNetAdpState_Invalid))
1113	{
1114	RTMAC Mac;
1115	/* Found an empty slot -- use it. */
1116	Log(("vboxNetAdpCreate: found empty slot: %d\n", i));
1117	if (pcszName)
1118	{
1119	Log(("vboxNetAdpCreate: using name: %s\n", pcszName));
1120	pThis->iUnit = vboxNetAdpGetUnitByName(pcszName);
1121	strncpy(pThis->szName, pcszName, sizeof(pThis->szName));
1122	pThis->szName[sizeof(pThis->szName) - 1] = '\0';
1123	}
1124	else
1125	{
1126	pThis->iUnit = vboxNetAdpGetNextAvailableUnit();
1127	pThis->szName[0] = '\0';
1128	}
1129	if (pThis->iUnit < 0)
1130	rc = VERR_INVALID_PARAMETER;
1131	else
1132	{
1133	vboxNetAdpComposeMACAddress(pThis, &Mac);
1134	rc = vboxNetAdpOsCreate(pThis, &Mac);
1135	Log(("vboxNetAdpCreate: pThis=%p pThis->iUnit=%d, pThis->szName=%s\n",
1136	pThis, pThis->iUnit, pThis->szName));
1137	}
1138	if (RT_SUCCESS(rc))
1139	{
1140	*ppNew = pThis;
1141	ASMAtomicWriteU32((uint32_t volatile *)&pThis->enmState, kVBoxNetAdpState_Active);
1142	Log2(("VBoxNetAdpCreate: Created %s\n", g_aAdapters[i].szName));
1143	}
1144	else
1145	{
1146	ASMAtomicWriteU32((uint32_t volatile *)&pThis->enmState, kVBoxNetAdpState_Invalid);
1147	Log(("vboxNetAdpCreate: vboxNetAdpOsCreate failed with '%Rrc'.\n", rc));
1148	}
1149	for (i = 0; i < RT_ELEMENTS(g_aAdapters); i++)
1150	Log2(("VBoxNetAdpCreate: Scanning entry: state=%d unit=%d name=%s\n",
1151	g_aAdapters[i].enmState, g_aAdapters[i].iUnit, g_aAdapters[i].szName));
1152	return rc;
1153	}
1154	}
1155	Log(("vboxNetAdpCreate: no empty slots!\n"));
1156
1157	/* All slots in adapter array are busy. */
1158	return VERR_OUT_OF_RESOURCES;
1159	}
1160
1161	int vboxNetAdpDestroy(PVBOXNETADP pThis)
1162	{
1163	int rc = VINF_SUCCESS;
1164
1165	if (!ASMAtomicCmpXchgU32((uint32_t volatile *)&pThis->enmState, kVBoxNetAdpState_Transitional, kVBoxNetAdpState_Active))
1166	return VERR_INTNET_FLT_IF_BUSY;
1167
1168	Assert(pThis->iUnit >= 0 && pThis->iUnit < VBOXNETADP_MAX_UNITS);
1169	vboxNetAdpOsDestroy(pThis);
1170	vboxNetAdpReleaseUnit(pThis->iUnit);
1171	pThis->iUnit = -1;
1172	pThis->szName[0] = '\0';
1173
1174	ASMAtomicWriteU32((uint32_t volatile *)&pThis->enmState, kVBoxNetAdpState_Invalid);
1175
1176	return rc;
1177	}
1178
1179	int vboxNetAdpInit(void)
1180	{
1181	unsigned i;
1182	/*
1183	* Init common members and call OS-specific init.
1184	*/
1185	memset(g_aUnits, 0, sizeof(g_aUnits));
1186	memset(g_aAdapters, 0, sizeof(g_aAdapters));
1187	LogFlow(("vboxnetadp: max host-only interfaces supported: %d (%d bytes)\n",
1188	VBOXNETADP_MAX_INSTANCES, sizeof(g_aAdapters)));
1189	for (i = 0; i < RT_ELEMENTS(g_aAdapters); i++)
1190	{
1191	g_aAdapters[i].enmState = kVBoxNetAdpState_Invalid;
1192	g_aAdapters[i].iUnit = -1;
1193	vboxNetAdpOsInit(&g_aAdapters[i]);
1194	}
1195
1196	return VINF_SUCCESS;
1197	}
1198
1199	/**
1200	* Finds an adapter by its name.
1201	*
1202	* @returns Pointer to the instance by the given name. NULL if not found.
1203	* @param pGlobals The globals.
1204	* @param pszName The name of the instance.
1205	*/
1206	PVBOXNETADP vboxNetAdpFindByName(const char *pszName)
1207	{
1208	unsigned i;
1209
1210	for (i = 0; i < RT_ELEMENTS(g_aAdapters); i++)
1211	{
1212	PVBOXNETADP pThis = &g_aAdapters[i];
1213	Log2(("VBoxNetAdp: Scanning entry: state=%d name=%s\n", pThis->enmState, pThis->szName));
1214	if ( strcmp(pThis->szName, pszName) == 0
1215	&& ASMAtomicReadU32((uint32_t volatile *)&pThis->enmState) == kVBoxNetAdpState_Active)
1216	return pThis;
1217	}
1218	return NULL;
1219	}
1220
1221	void vboxNetAdpShutdown(void)
1222	{
1223	unsigned i;
1224
1225	/* Remove virtual adapters */
1226	for (i = 0; i < RT_ELEMENTS(g_aAdapters); i++)
1227	vboxNetAdpDestroy(&g_aAdapters[i]);
1228	}
1229	#endif /* !VBOXANETADP_DO_NOT_USE_NETFLT */

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source: vbox/trunk/src/VBox/HostDrivers/VBoxNetAdp/VBoxNetAdp.c@ 47195

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