VBoxNetAdp.c@ 39400

Last change on this file since 39400 was 38408, checked in by vboxsync, 13 years ago
vboxnetflt: partial BPF support for bridged interfaces (#5817)
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
File size: 36.9 KB

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1	/* $Id: VBoxNetAdp.c 38408 2011-08-10 20:07:04Z vboxsync $ */
2	/** @file
3	* VBoxNetAdp - Virtual Network Adapter Driver (Host), Common Code.
4	*/
5
6	/*
7	* Copyright (C) 2008-2009 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	RTSPINLOCKTMP Tmp = RTSPINLOCKTMP_INITIALIZER;
109	Log(("vboxNetAdpSetStateWithLock: pThis=%p, state=%d.\n", pThis, enmNewState));
110	RTSpinlockAcquireNoInts(pThis->hSpinlock, &Tmp);
111	vboxNetAdpSetState(pThis, enmNewState);
112	RTSpinlockReleaseNoInts(pThis->hSpinlock, &Tmp);
113	}
114
115
116	/**
117	* Gets the enmState member with locking.
118	*
119	* Used for all reads.
120	*
121	* @returns The enmState value.
122	* @param pThis The instance.
123	*/
124	DECLINLINE(VBOXNETADPSTATE) vboxNetAdpGetStateWithLock(PVBOXNETADP pThis)
125	{
126	VBOXNETADPSTATE enmState;
127	RTSPINLOCKTMP Tmp = RTSPINLOCKTMP_INITIALIZER;
128	RTSpinlockAcquireNoInts(pThis->hSpinlock, &Tmp);
129	enmState = vboxNetAdpGetState(pThis);
130	RTSpinlockReleaseNoInts(pThis->hSpinlock, &Tmp);
131	Log(("vboxNetAdpGetStateWithLock: pThis=%p, state=%d.\n", pThis, enmState));
132	return enmState;
133	}
134
135
136	/**
137	* Checks and sets the enmState member atomically.
138	*
139	* Used for all updates.
140	*
141	* @returns true if the state has been changed.
142	* @param pThis The instance.
143	* @param enmNewState The new value.
144	*/
145	DECLINLINE(bool) vboxNetAdpCheckAndSetState(PVBOXNETADP pThis, VBOXNETADPSTATE enmOldState, VBOXNETADPSTATE enmNewState)
146	{
147	VBOXNETADPSTATE enmActualState;
148	bool fRc = true; /* be optimistic */
149	RTSPINLOCKTMP Tmp = RTSPINLOCKTMP_INITIALIZER;
150
151	RTSpinlockAcquireNoInts(pThis->hSpinlock, &Tmp);
152	enmActualState = vboxNetAdpGetState(pThis); /** @todo r=bird: ASMAtomicCmpXchgU32()*/
153	if (enmActualState == enmOldState)
154	vboxNetAdpSetState(pThis, enmNewState);
155	else
156	fRc = false;
157	RTSpinlockReleaseNoInts(pThis->hSpinlock, &Tmp);
158
159	if (fRc)
160	Log(("vboxNetAdpCheckAndSetState: pThis=%p, state changed: %d -> %d.\n", pThis, enmOldState, enmNewState));
161	else
162	Log(("vboxNetAdpCheckAndSetState: pThis=%p, no state change: %d != %d (expected).\n", pThis, enmActualState, enmOldState));
163	return fRc;
164	}
165
166
167	/**
168	* Finds a instance by its name, the caller does the locking.
169	*
170	* @returns Pointer to the instance by the given name. NULL if not found.
171	* @param pGlobals The globals.
172	* @param pszName The name of the instance.
173	*/
174	static PVBOXNETADP vboxNetAdpFind(PVBOXNETADPGLOBALS pGlobals, const char *pszName)
175	{
176	unsigned i;
177
178	for (i = 0; i < RT_ELEMENTS(pGlobals->aAdapters); i++)
179	{
180	RTSPINLOCKTMP Tmp = RTSPINLOCKTMP_INITIALIZER;
181	PVBOXNETADP pThis = &pGlobals->aAdapters[i];
182	RTSpinlockAcquireNoInts(pThis->hSpinlock, &Tmp);
183	if ( vboxNetAdpGetState(pThis)
184	&& !strcmp(pThis->szName, pszName))
185	{
186	RTSpinlockReleaseNoInts(pThis->hSpinlock, &Tmp);
187	return pThis;
188	}
189	RTSpinlockReleaseNoInts(pThis->hSpinlock, &Tmp);
190	}
191	return NULL;
192	}
193
194
195	/**
196	* Releases a reference to the specified instance.
197	*
198	* @param pThis The instance.
199	* @param fBusy Whether the busy counter should be decremented too.
200	*/
201	DECLHIDDEN(void) vboxNetAdpRelease(PVBOXNETADP pThis)
202	{
203	uint32_t cRefs;
204
205	/*
206	* Paranoid Android.
207	*/
208	AssertPtr(pThis);
209	Assert(pThis->MyPort.u32Version == INTNETTRUNKIFPORT_VERSION);
210	Assert(pThis->MyPort.u32VersionEnd == INTNETTRUNKIFPORT_VERSION);
211	Assert(vboxNetAdpGetState(pThis) > kVBoxNetAdpState_Invalid);
212	AssertPtr(pThis->pGlobals);
213	Assert(pThis->hEventIdle != NIL_RTSEMEVENT);
214	Assert(pThis->hSpinlock != NIL_RTSPINLOCK);
215	Assert(pThis->szName[0]);
216
217	/*
218	* The object reference counting.
219	*/
220	cRefs = ASMAtomicDecU32(&pThis->cRefs);
221	Assert(cRefs < UINT32_MAX / 2);
222	}
223
224
225	/**
226	* Decrements the busy counter and does idle wakeup.
227	*
228	* @param pThis The instance.
229	*/
230	DECLHIDDEN(void) vboxNetAdpIdle(PVBOXNETADP pThis)
231	{
232	uint32_t cBusy;
233
234	/*
235	* Paranoid Android.
236	*/
237	AssertPtr(pThis);
238	Assert(pThis->MyPort.u32Version == INTNETTRUNKIFPORT_VERSION);
239	Assert(pThis->MyPort.u32VersionEnd == INTNETTRUNKIFPORT_VERSION);
240	Assert(vboxNetAdpGetState(pThis) >= kVBoxNetAdpState_Connected);
241	AssertPtr(pThis->pGlobals);
242	Assert(pThis->hEventIdle != NIL_RTSEMEVENT);
243
244	cBusy = ASMAtomicDecU32(&pThis->cBusy);
245	if (!cBusy)
246	{
247	int rc = RTSemEventSignal(pThis->hEventIdle);
248	AssertRC(rc);
249	}
250	else
251	Assert(cBusy < UINT32_MAX / 2);
252	}
253
254
255	/**
256	* Retains a reference to the specified instance.
257	*
258	* @param pThis The instance.
259	*/
260	DECLHIDDEN(void) vboxNetAdpRetain(PVBOXNETADP pThis)
261	{
262	uint32_t cRefs;
263
264	/*
265	* Paranoid Android.
266	*/
267	AssertPtr(pThis);
268	Assert(pThis->MyPort.u32Version == INTNETTRUNKIFPORT_VERSION);
269	Assert(pThis->MyPort.u32VersionEnd == INTNETTRUNKIFPORT_VERSION);
270	Assert(vboxNetAdpGetState(pThis) > kVBoxNetAdpState_Invalid);
271	AssertPtr(pThis->pGlobals);
272	Assert(pThis->hEventIdle != NIL_RTSEMEVENT);
273	Assert(pThis->hSpinlock != NIL_RTSPINLOCK);
274	Assert(pThis->szName[0]);
275
276	/*
277	* Retain the object.
278	*/
279	cRefs = ASMAtomicIncU32(&pThis->cRefs);
280	Assert(cRefs > 1 && cRefs < UINT32_MAX / 2);
281
282	NOREF(cRefs);
283	}
284
285
286	/**
287	* Increments busy counter.
288	*
289	* @param pThis The instance.
290	*/
291	DECLHIDDEN(void) vboxNetAdpBusy(PVBOXNETADP pThis)
292	{
293	uint32_t cBusy;
294
295	/*
296	* Are we vigilant enough?
297	*/
298	AssertPtr(pThis);
299	Assert(pThis->MyPort.u32Version == INTNETTRUNKIFPORT_VERSION);
300	Assert(pThis->MyPort.u32VersionEnd == INTNETTRUNKIFPORT_VERSION);
301	Assert(vboxNetAdpGetState(pThis) >= kVBoxNetAdpState_Connected);
302	AssertPtr(pThis->pGlobals);
303	Assert(pThis->hEventIdle != NIL_RTSEMEVENT);
304	cBusy = ASMAtomicIncU32(&pThis->cBusy);
305	Assert(cBusy > 0 && cBusy < UINT32_MAX / 2);
306
307	NOREF(cBusy);
308	}
309
310
311	/**
312	* Generate a suitable MAC address.
313	*
314	* @param pThis The instance.
315	* @param pMac Where to return the MAC address.
316	*/
317	DECLHIDDEN(void) vboxNetAdpComposeMACAddress(PVBOXNETADP pThis, PRTMAC pMac)
318	{
319	#if 0 /* Use a locally administered version of the OUI we use for the guest NICs. */
320	pMac->au8[0] = 0x08 \| 2;
321	pMac->au8[1] = 0x00;
322	pMac->au8[2] = 0x27;
323	#else /* this is what \0vb comes down to. It seems to be unassigned atm. */
324	pMac->au8[0] = 0;
325	pMac->au8[1] = 0x76;
326	pMac->au8[2] = 0x62;
327	#endif
328
329	pMac->au8[3] = 0; /* pThis->uUnit >> 16; */
330	pMac->au8[4] = 0; /* pThis->uUnit >> 8; */
331	pMac->au8[5] = pThis->uUnit;
332	}
333
334
335	/**
336	* Checks if receive is possible and increases busy and ref counters if so.
337	*
338	* @param pThis The instance.
339	*/
340	DECLHIDDEN(bool) vboxNetAdpPrepareToReceive(PVBOXNETADP pThis)
341	{
342	RTSPINLOCKTMP Tmp = RTSPINLOCKTMP_INITIALIZER;
343	bool fCanReceive = false;
344	/*
345	* Input validation.
346	*/
347	AssertPtr(pThis);
348	Assert(pThis->MyPort.u32Version == INTNETTRUNKIFPORT_VERSION);
349	RTSpinlockAcquireNoInts(pThis->hSpinlock, &Tmp);
350	if (vboxNetAdpGetState(pThis) == kVBoxNetAdpState_Active)
351	{
352	fCanReceive = true;
353	vboxNetAdpRetain(pThis);
354	vboxNetAdpBusy(pThis);
355	}
356	RTSpinlockReleaseNoInts(pThis->hSpinlock, &Tmp);
357	Log(("vboxNetAdpPrepareToReceive: fCanReceive=%d.\n", fCanReceive));
358
359	return fCanReceive;
360	}
361
362
363	/**
364	* Forwards scatter/gather list to internal network and decreases busy and ref counters.
365	*
366	* @param pThis The instance.
367	*/
368	DECLHIDDEN(void) vboxNetAdpReceive(PVBOXNETADP pThis, PINTNETSG pSG)
369	{
370	RTSPINLOCKTMP Tmp = RTSPINLOCKTMP_INITIALIZER;
371	/*
372	* Input validation.
373	*/
374	AssertPtr(pThis);
375	AssertPtr(pSG);
376	AssertPtr(pThis->pSwitchPort);
377	Assert(pThis->MyPort.u32Version == INTNETTRUNKIFPORT_VERSION);
378	Log(("vboxNetAdpReceive: forwarding packet to internal net...\n"));
379	pThis->pSwitchPort->pfnRecv(pThis->pSwitchPort, pSG, INTNETTRUNKDIR_HOST);
380	vboxNetAdpIdle(pThis);
381	vboxNetAdpRelease(pThis);
382	}
383
384
385	/**
386	* Decreases busy and ref counters.
387	*
388	* @param pThis The instance.
389	*/
390	DECLHIDDEN(void) vboxNetAdpCancelReceive(PVBOXNETADP pThis)
391	{
392	Log(("vboxNetAdpCancelReceive: cancelled.\n"));
393	vboxNetAdpIdle(pThis);
394	vboxNetAdpRelease(pThis);
395	}
396
397
398	/**
399	* @copydoc INTNETTRUNKIFPORT::pfnXmit
400	*/
401	static DECLCALLBACK(int) vboxNetAdpPortXmit(PINTNETTRUNKIFPORT pIfPort, PINTNETSG pSG, uint32_t fDst)
402	{
403	RTSPINLOCKTMP Tmp = RTSPINLOCKTMP_INITIALIZER;
404	PVBOXNETADP pThis = IFPORT_2_VBOXNETADP(pIfPort);
405	int rc = VINF_SUCCESS;
406
407	/*
408	* Input validation.
409	*/
410	AssertPtr(pThis);
411	AssertPtr(pSG);
412	Assert(pThis->MyPort.u32Version == INTNETTRUNKIFPORT_VERSION);
413
414	Log(("vboxNetAdpPortXmit: outgoing packet (len=%d)\n", pSG->cbTotal));
415
416	/*
417	* Do a retain/busy, invoke the OS specific code.
418	*/
419	RTSpinlockAcquireNoInts(pThis->hSpinlock, &Tmp);
420	if (vboxNetAdpGetState(pThis) != kVBoxNetAdpState_Active)
421	{
422	RTSpinlockReleaseNoInts(pThis->hSpinlock, &Tmp);
423	Log(("vboxNetAdpReceive: Dropping incoming packet for inactive interface %s.\n",
424	pThis->szName));
425	return VERR_INVALID_STATE;
426	}
427	vboxNetAdpRetain(pThis);
428	vboxNetAdpBusy(pThis);
429	RTSpinlockReleaseNoInts(pThis->hSpinlock, &Tmp);
430
431	rc = vboxNetAdpPortOsXmit(pThis, pSG, fDst);
432	vboxNetAdpIdle(pThis);
433	vboxNetAdpRelease(pThis);
434
435	return rc;
436	}
437
438
439	/**
440	* @copydoc INTNETTRUNKIFPORT::pfnGetMacAddress
441	*/
442	static DECLCALLBACK(void) vboxNetAdpPortGetMacAddress(PINTNETTRUNKIFPORT pIfPort, PRTMAC pMac)
443	{
444	PVBOXNETADP pThis = IFPORT_2_VBOXNETADP(pIfPort);
445
446	/*
447	* Input validation.
448	*/
449	AssertPtr(pThis);
450	Assert(pThis->MyPort.u32Version == INTNETTRUNKIFPORT_VERSION);
451	Assert(vboxNetAdpGetStateWithLock(pThis) == kVBoxNetAdpState_Active);
452
453	/*
454	* Forward the question to the OS specific code.
455	*/
456	vboxNetAdpPortOsGetMacAddress(pThis, pMac);
457	}
458
459
460	/**
461	* @copydoc INTNETTRUNKIFPORT::pfnWaitForIdle
462	*/
463	static DECLCALLBACK(int) vboxNetAdpPortWaitForIdle(PINTNETTRUNKIFPORT pIfPort, uint32_t cMillies)
464	{
465	int rc;
466	PVBOXNETADP pThis = IFPORT_2_VBOXNETADP(pIfPort);
467
468	/*
469	* Input validation.
470	*/
471	AssertPtr(pThis);
472	Assert(pThis->MyPort.u32Version == INTNETTRUNKIFPORT_VERSION);
473	AssertReturn(vboxNetAdpGetStateWithLock(pThis) >= kVBoxNetAdpState_Connected, VERR_INVALID_STATE);
474
475	/*
476	* Go to sleep on the semaphore after checking the busy count.
477	*/
478	vboxNetAdpRetain(pThis);
479
480	rc = VINF_SUCCESS;
481	while (pThis->cBusy && RT_SUCCESS(rc))
482	rc = RTSemEventWait(pThis->hEventIdle, cMillies); /** @todo make interruptible? */
483
484	vboxNetAdpRelease(pThis);
485
486	return rc;
487	}
488
489
490	/**
491	* @copydoc INTNETTRUNKIFPORT::pfnSetActive
492	*/
493	static DECLCALLBACK(bool) vboxNetAdpPortSetActive(PINTNETTRUNKIFPORT pIfPort, bool fActive)
494	{
495	bool fPreviouslyActive;
496	RTSPINLOCKTMP Tmp = RTSPINLOCKTMP_INITIALIZER;
497	PVBOXNETADP pThis = IFPORT_2_VBOXNETADP(pIfPort);
498
499	/*
500	* Input validation.
501	*/
502	AssertPtr(pThis);
503	AssertPtr(pThis->pGlobals);
504	Assert(pThis->MyPort.u32Version == INTNETTRUNKIFPORT_VERSION);
505
506	Log(("vboxNetAdpPortSetActive: pThis=%p, fActive=%d, state before: %d.\n", pThis, fActive, vboxNetAdpGetState(pThis)));
507	RTSpinlockAcquireNoInts(pThis->hSpinlock, &Tmp);
508
509	fPreviouslyActive = vboxNetAdpGetState(pThis) == kVBoxNetAdpState_Active;
510	if (fPreviouslyActive != fActive)
511	{
512	switch (vboxNetAdpGetState(pThis))
513	{
514	case kVBoxNetAdpState_Connected:
515	vboxNetAdpSetState(pThis, kVBoxNetAdpState_Active);
516	break;
517	case kVBoxNetAdpState_Active:
518	vboxNetAdpSetState(pThis, kVBoxNetAdpState_Connected);
519	break;
520	default:
521	break;
522	}
523	}
524
525	RTSpinlockReleaseNoInts(pThis->hSpinlock, &Tmp);
526	Log(("vboxNetAdpPortSetActive: state after: %RTbool.\n", vboxNetAdpGetState(pThis)));
527	return fPreviouslyActive;
528	}
529
530
531	/**
532	* @copydoc INTNETTRUNKIFPORT::pfnDisconnectAndRelease
533	*/
534	static DECLCALLBACK(void) vboxNetAdpPortDisconnectAndRelease(PINTNETTRUNKIFPORT pIfPort)
535	{
536	PVBOXNETADP pThis = IFPORT_2_VBOXNETADP(pIfPort);
537	RTSPINLOCKTMP Tmp = RTSPINLOCKTMP_INITIALIZER;
538
539	/*
540	* Serious paranoia.
541	*/
542	AssertPtr(pThis);
543	Assert(pThis->MyPort.u32Version == INTNETTRUNKIFPORT_VERSION);
544	Assert(pThis->MyPort.u32VersionEnd == INTNETTRUNKIFPORT_VERSION);
545	AssertPtr(pThis->pGlobals);
546	Assert(pThis->hEventIdle != NIL_RTSEMEVENT);
547	Assert(pThis->hSpinlock != NIL_RTSPINLOCK);
548
549
550	/*
551	* Disconnect and release it.
552	*/
553	RTSpinlockAcquireNoInts(pThis->hSpinlock, &Tmp);
554	//Assert(vboxNetAdpGetState(pThis) == kVBoxNetAdpState_Connected);
555	Assert(!pThis->cBusy);
556	vboxNetAdpSetState(pThis, kVBoxNetAdpState_Transitional);
557	RTSpinlockReleaseNoInts(pThis->hSpinlock, &Tmp);
558
559	vboxNetAdpOsDisconnectIt(pThis);
560	pThis->pSwitchPort = NULL;
561
562	RTSpinlockAcquireNoInts(pThis->hSpinlock, &Tmp);
563	vboxNetAdpSetState(pThis, kVBoxNetAdpState_Available);
564	RTSpinlockReleaseNoInts(pThis->hSpinlock, &Tmp);
565
566	vboxNetAdpRelease(pThis);
567	}
568
569
570	/**
571	* @copydoc INTNETTRUNKIFPORT::pfnRelease
572	*/
573	static DECLCALLBACK(void) vboxNetAdpPortRelease(PINTNETTRUNKIFPORT pIfPort)
574	{
575	PVBOXNETADP pThis = IFPORT_2_VBOXNETADP(pIfPort);
576	vboxNetAdpRelease(pThis);
577	}
578
579
580	/**
581	* @copydoc INTNETTRUNKIFPORT::pfnRetain
582	*/
583	static DECLCALLBACK(void) vboxNetAdpPortRetain(PINTNETTRUNKIFPORT pIfPort)
584	{
585	PVBOXNETADP pThis = IFPORT_2_VBOXNETADP(pIfPort);
586	vboxNetAdpRetain(pThis);
587	}
588
589
590	int vboxNetAdpCreate(PINTNETTRUNKFACTORY pIfFactory, PVBOXNETADP *ppNew)
591	{
592	int rc;
593	unsigned i;
594	PVBOXNETADPGLOBALS pGlobals = (PVBOXNETADPGLOBALS)((uint8_t *)pIfFactory - RT_OFFSETOF(VBOXNETADPGLOBALS, TrunkFactory));
595
596	for (i = 0; i < RT_ELEMENTS(pGlobals->aAdapters); i++)
597	{
598	RTSPINLOCKTMP Tmp = RTSPINLOCKTMP_INITIALIZER;
599	PVBOXNETADP pThis = &pGlobals->aAdapters[i];
600
601	if (vboxNetAdpCheckAndSetState(pThis, kVBoxNetAdpState_Invalid, kVBoxNetAdpState_Transitional))
602	{
603	/* Found an empty slot -- use it. */
604	uint32_t cRefs = ASMAtomicIncU32(&pThis->cRefs);
605	Assert(cRefs == 1);
606	RTMAC Mac;
607	vboxNetAdpComposeMACAddress(pThis, &Mac);
608	rc = vboxNetAdpOsCreate(pThis, &Mac);
609	*ppNew = pThis;
610	RTSpinlockAcquireNoInts(pThis->hSpinlock, &Tmp);
611	vboxNetAdpSetState(pThis, kVBoxNetAdpState_Available);
612	RTSpinlockReleaseNoInts(pThis->hSpinlock, &Tmp);
613	return rc;
614	}
615	}
616
617	/* All slots in adapter array are busy. */
618	return VERR_OUT_OF_RESOURCES;
619	}
620
621	int vboxNetAdpDestroy(PVBOXNETADP pThis)
622	{
623	int rc = VINF_SUCCESS;
624	RTSPINLOCKTMP Tmp = RTSPINLOCKTMP_INITIALIZER;
625
626	RTSpinlockAcquireNoInts(pThis->hSpinlock, &Tmp);
627	if (vboxNetAdpGetState(pThis) != kVBoxNetAdpState_Available \|\| pThis->cBusy)
628	{
629	RTSpinlockReleaseNoInts(pThis->hSpinlock, &Tmp);
630	return VERR_INTNET_FLT_IF_BUSY;
631	}
632	vboxNetAdpSetState(pThis, kVBoxNetAdpState_Transitional);
633	RTSpinlockReleaseNoInts(pThis->hSpinlock, &Tmp);
634	vboxNetAdpRelease(pThis);
635
636	vboxNetAdpOsDestroy(pThis);
637
638	RTSpinlockAcquireNoInts(pThis->hSpinlock, &Tmp);
639	vboxNetAdpSetState(pThis, kVBoxNetAdpState_Invalid);
640	RTSpinlockReleaseNoInts(pThis->hSpinlock, &Tmp);
641
642	return rc;
643	}
644
645	/**
646	* Connects the instance to the specified switch port.
647	*
648	* Called while owning the lock. We're ASSUMING that the internal
649	* networking code is already owning an recursive mutex, so, there
650	* will be no deadlocks when vboxNetAdpOsConnectIt calls back into
651	* it for setting preferences.
652	*
653	* @returns VBox status code.
654	* @param pThis The instance.
655	* @param pSwitchPort The port on the internal network 'switch'.
656	* @param ppIfPort Where to return our port interface.
657	*/
658	static int vboxNetAdpConnectIt(PVBOXNETADP pThis, PINTNETTRUNKSWPORT pSwitchPort, PINTNETTRUNKIFPORT *ppIfPort)
659	{
660	int rc;
661
662	/*
663	* Validate state.
664	*/
665	Assert(!pThis->cBusy);
666	Assert(vboxNetAdpGetStateWithLock(pThis) == kVBoxNetAdpState_Transitional);
667
668	/*
669	* Do the job.
670	* Note that we're calling the os stuff while owning the semaphore here.
671	*/
672	pThis->pSwitchPort = pSwitchPort;
673	rc = vboxNetAdpOsConnectIt(pThis);
674	if (RT_SUCCESS(rc))
675	{
676	*ppIfPort = &pThis->MyPort;
677	}
678	else
679	pThis->pSwitchPort = NULL;
680
681	return rc;
682	}
683
684
685	/**
686	* @copydoc INTNETTRUNKFACTORY::pfnCreateAndConnect
687	*/
688	static DECLCALLBACK(int) vboxNetAdpFactoryCreateAndConnect(PINTNETTRUNKFACTORY pIfFactory, const char *pszName,
689	PINTNETTRUNKSWPORT pSwitchPort, uint32_t fFlags,
690	PINTNETTRUNKIFPORT *ppIfPort)
691	{
692	PVBOXNETADPGLOBALS pGlobals = (PVBOXNETADPGLOBALS)((uint8_t *)pIfFactory - RT_OFFSETOF(VBOXNETADPGLOBALS, TrunkFactory));
693	PVBOXNETADP pThis;
694	int rc;
695
696	LogFlow(("vboxNetAdpFactoryCreateAndConnect: pszName=%p:{%s} fFlags=%#x\n", pszName, pszName, fFlags));
697	Assert(pGlobals->cFactoryRefs > 0);
698	AssertMsgReturn(!fFlags,
699	("%#x\n", fFlags), VERR_INVALID_PARAMETER);
700
701	/*
702	* Find instance, check if busy, connect if not.
703	*/
704	pThis = vboxNetAdpFind(pGlobals, pszName);
705	if (pThis)
706	{
707	if (vboxNetAdpCheckAndSetState(pThis, kVBoxNetAdpState_Available, kVBoxNetAdpState_Transitional))
708	{
709	vboxNetAdpRetain(pThis);
710	rc = vboxNetAdpConnectIt(pThis, pSwitchPort, ppIfPort);
711	vboxNetAdpSetStateWithLock(pThis, RT_SUCCESS(rc) ? kVBoxNetAdpState_Connected : kVBoxNetAdpState_Available);
712	}
713	else
714	rc = VERR_INTNET_FLT_IF_BUSY;
715	}
716	else
717	rc = VERR_INTNET_FLT_IF_NOT_FOUND;
718
719	return rc;
720	}
721
722
723	/**
724	* @copydoc INTNETTRUNKFACTORY::pfnRelease
725	*/
726	static DECLCALLBACK(void) vboxNetAdpFactoryRelease(PINTNETTRUNKFACTORY pIfFactory)
727	{
728	PVBOXNETADPGLOBALS pGlobals = (PVBOXNETADPGLOBALS)((uint8_t *)pIfFactory - RT_OFFSETOF(VBOXNETADPGLOBALS, TrunkFactory));
729
730	int32_t cRefs = ASMAtomicDecS32(&pGlobals->cFactoryRefs);
731	Assert(cRefs >= 0); NOREF(cRefs);
732	LogFlow(("vboxNetAdpFactoryRelease: cRefs=%d (new)\n", cRefs));
733	}
734
735
736	/**
737	* Implements the SUPDRV component factor interface query method.
738	*
739	* @returns Pointer to an interface. NULL if not supported.
740	*
741	* @param pSupDrvFactory Pointer to the component factory registration structure.
742	* @param pSession The session - unused.
743	* @param pszInterfaceUuid The factory interface id.
744	*/
745	static DECLCALLBACK(void ) vboxNetAdpQueryFactoryInterface(PCSUPDRVFACTORY pSupDrvFactory, PSUPDRVSESSION pSession, const char pszInterfaceUuid)
746	{
747	PVBOXNETADPGLOBALS pGlobals = (PVBOXNETADPGLOBALS)((uint8_t *)pSupDrvFactory - RT_OFFSETOF(VBOXNETADPGLOBALS, SupDrvFactory));
748
749	/*
750	* Convert the UUID strings and compare them.
751	*/
752	RTUUID UuidReq;
753	int rc = RTUuidFromStr(&UuidReq, pszInterfaceUuid);
754	if (RT_SUCCESS(rc))
755	{
756	if (!RTUuidCompareStr(&UuidReq, INTNETTRUNKFACTORY_UUID_STR))
757	{
758	ASMAtomicIncS32(&pGlobals->cFactoryRefs);
759	return &pGlobals->TrunkFactory;
760	}
761	#ifdef LOG_ENABLED
762	else
763	Log(("VBoxNetAdp: unknown factory interface query (%s)\n", pszInterfaceUuid));
764	#endif
765	}
766	else
767	Log(("VBoxNetAdp: rc=%Rrc, uuid=%s\n", rc, pszInterfaceUuid));
768
769	return NULL;
770	}
771
772
773	/**
774	* Checks whether the VBoxNetAdp wossname can be unloaded.
775	*
776	* This will return false if someone is currently using the module.
777	*
778	* @returns true if it's relatively safe to unload it, otherwise false.
779	* @param pGlobals Pointer to the globals.
780	*/
781	DECLHIDDEN(bool) vboxNetAdpCanUnload(PVBOXNETADPGLOBALS pGlobals)
782	{
783	bool fRc = true; /* Assume it can be unloaded. */
784	unsigned i;
785
786	for (i = 0; i < RT_ELEMENTS(pGlobals->aAdapters); i++)
787	{
788	PVBOXNETADP pThis = &pGlobals->aAdapters[i];
789	if (vboxNetAdpGetStateWithLock(&pGlobals->aAdapters[i]) >= kVBoxNetAdpState_Connected)
790	{
791	fRc = false;
792	break; /* We already know the answer. */
793	}
794	}
795	return fRc && ASMAtomicUoReadS32((int32_t volatile *)&pGlobals->cFactoryRefs) <= 0;
796	}
797
798	/**
799	* tries to deinitialize Idc
800	* we separate the globals settings "base" which is actually
801	* "general" globals settings except for Idc, and idc.
802	* This is needed for windows filter driver, which gets loaded prior to VBoxDrv,
803	* thus it's not possible to make idc initialization from the driver startup routine for it,
804	* though the "base is still needed for the driver to functions".
805	* @param pGlobals
806	* @return VINF_SUCCESS on success, VERR_WRONG_ORDER if we're busy.
807	*/
808	DECLHIDDEN(int) vboxNetAdpTryDeleteIdc(PVBOXNETADPGLOBALS pGlobals)
809	{
810	int rc;
811
812	Assert(pGlobals->hFastMtx != NIL_RTSEMFASTMUTEX);
813
814	/*
815	* Check before trying to deregister the factory.
816	*/
817	if (!vboxNetAdpCanUnload(pGlobals))
818	return VERR_WRONG_ORDER;
819
820	/*
821	* Disconnect from SUPDRV and check that nobody raced us,
822	* reconnect if that should happen.
823	*/
824	rc = SUPR0IdcComponentDeregisterFactory(&pGlobals->SupDrvIDC, &pGlobals->SupDrvFactory);
825	AssertRC(rc);
826	if (!vboxNetAdpCanUnload(pGlobals))
827	{
828	rc = SUPR0IdcComponentRegisterFactory(&pGlobals->SupDrvIDC, &pGlobals->SupDrvFactory);
829	AssertRC(rc);
830	return VERR_WRONG_ORDER;
831	}
832
833	SUPR0IdcClose(&pGlobals->SupDrvIDC);
834
835	return rc;
836	}
837
838	static int vboxNetAdpSlotCreate(PVBOXNETADPGLOBALS pGlobals, unsigned uUnit, PVBOXNETADP pNew)
839	{
840	int rc;
841
842	pNew->MyPort.u32Version = INTNETTRUNKIFPORT_VERSION;
843	pNew->MyPort.pfnRetain = vboxNetAdpPortRetain;
844	pNew->MyPort.pfnRelease = vboxNetAdpPortRelease;
845	pNew->MyPort.pfnDisconnectAndRelease= vboxNetAdpPortDisconnectAndRelease;
846	pNew->MyPort.pfnSetState = vboxNetAdpPortSetState;
847	pNew->MyPort.pfnWaitForIdle = vboxNetAdpPortWaitForIdle;
848	pNew->MyPort.pfnXmit = vboxNetAdpPortXmit;
849	pNew->MyPort.u32VersionEnd = INTNETTRUNKIFPORT_VERSION;
850	pNew->pSwitchPort = NULL;
851	pNew->pGlobals = pGlobals;
852	pNew->hSpinlock = NIL_RTSPINLOCK;
853	pNew->enmState = kVBoxNetAdpState_Invalid;
854	pNew->cRefs = 0;
855	pNew->cBusy = 0;
856	pNew->hEventIdle = NIL_RTSEMEVENT;
857
858	rc = RTSpinlockCreate(&pNew->hSpinlock);
859	if (RT_SUCCESS(rc))
860	{
861	rc = RTSemEventCreate(&pNew->hEventIdle);
862	if (RT_SUCCESS(rc))
863	{
864	rc = vboxNetAdpOsInit(pNew);
865	if (RT_SUCCESS(rc))
866	{
867	return rc;
868	}
869	RTSemEventDestroy(pNew->hEventIdle);
870	pNew->hEventIdle = NIL_RTSEMEVENT;
871	}
872	RTSpinlockDestroy(pNew->hSpinlock);
873	pNew->hSpinlock = NIL_RTSPINLOCK;
874	}
875	return rc;
876	}
877
878	static void vboxNetAdpSlotDestroy(PVBOXNETADP pThis)
879	{
880	Assert(pThis->cRefs == 0);
881	Assert(pThis->cBusy == 0);
882	Assert(vboxNetAdpGetState(pThis) == kVBoxNetAdpState_Invalid);
883	if (pThis->hEventIdle != NIL_RTSEMEVENT)
884	{
885	RTSemEventDestroy(pThis->hEventIdle);
886	pThis->hEventIdle = NIL_RTSEMEVENT;
887	}
888	if (pThis->hSpinlock != NIL_RTSPINLOCK)
889	{
890	RTSpinlockDestroy(pThis->hSpinlock);
891	pThis->hSpinlock = NIL_RTSPINLOCK;
892	}
893	}
894
895	/**
896	* performs "base" globals deinitialization
897	* we separate the globals settings "base" which is actually
898	* "general" globals settings except for Idc, and idc.
899	* This is needed for windows filter driver, which gets loaded prior to VBoxDrv,
900	* thus it's not possible to make idc initialization from the driver startup routine for it,
901	* though the "base is still needed for the driver to functions".
902	* @param pGlobals
903	* @return none
904	*/
905	DECLHIDDEN(void) vboxNetAdpDeleteGlobalsBase(PVBOXNETADPGLOBALS pGlobals)
906	{
907	int i;
908	/*
909	* Release resources.
910	*/
911	for (i = 0; i < (int)RT_ELEMENTS(pGlobals->aAdapters); i++)
912	if (RT_SUCCESS(vboxNetAdpDestroy(&pGlobals->aAdapters[i])))
913	vboxNetAdpSlotDestroy(&pGlobals->aAdapters[i]);
914
915	RTSemFastMutexDestroy(pGlobals->hFastMtx);
916	pGlobals->hFastMtx = NIL_RTSEMFASTMUTEX;
917
918	#ifdef VBOXNETADP_STATIC_CONFIG
919	RTSemEventDestroy(pGlobals->hTimerEvent);
920	pGlobals->hTimerEvent = NIL_RTSEMEVENT;
921	#endif
922
923	}
924
925
926	/**
927	* Called by the native part when the OS wants the driver to unload.
928	*
929	* @returns VINF_SUCCESS on success, VERR_WRONG_ORDER if we're busy.
930	*
931	* @param pGlobals Pointer to the globals.
932	*/
933	DECLHIDDEN(int) vboxNetAdpTryDeleteGlobals(PVBOXNETADPGLOBALS pGlobals)
934	{
935	int rc = vboxNetAdpTryDeleteIdc(pGlobals);
936	if (RT_SUCCESS(rc))
937	{
938	vboxNetAdpDeleteGlobalsBase(pGlobals);
939	}
940	return rc;
941	}
942
943
944	/**
945	* performs the "base" globals initialization
946	* we separate the globals initialization to globals "base" initialization which is actually
947	* "general" globals initialization except for Idc not being initialized, and idc initialization.
948	* This is needed for windows filter driver, which gets loaded prior to VBoxDrv,
949	* thus it's not possible to make idc initialization from the driver startup routine for it.
950	*
951	* @returns VBox status code.
952	* @param pGlobals Pointer to the globals. */
953	DECLHIDDEN(int) vboxNetAdpInitGlobalsBase(PVBOXNETADPGLOBALS pGlobals)
954	{
955	/*
956	* Initialize the common portions of the structure.
957	*/
958	int i;
959	int rc = RTSemFastMutexCreate(&pGlobals->hFastMtx);
960	if (RT_SUCCESS(rc))
961	{
962	memset(pGlobals->aAdapters, 0, sizeof(pGlobals->aAdapters));
963	for (i = 0; i < (int)RT_ELEMENTS(pGlobals->aAdapters); i++)
964	{
965	rc = vboxNetAdpSlotCreate(pGlobals, i, &pGlobals->aAdapters[i]);
966	if (RT_FAILURE(rc))
967	{
968	/* Clean up. */
969	while (--i >= 0)
970	vboxNetAdpSlotDestroy(&pGlobals->aAdapters[i]);
971	Log(("vboxNetAdpInitGlobalsBase: Failed to create fast mutex (rc=%Rrc).\n", rc));
972	RTSemFastMutexDestroy(pGlobals->hFastMtx);
973	return rc;
974	}
975	}
976	pGlobals->TrunkFactory.pfnRelease = vboxNetAdpFactoryRelease;
977	pGlobals->TrunkFactory.pfnCreateAndConnect = vboxNetAdpFactoryCreateAndConnect;
978
979	strcpy(pGlobals->SupDrvFactory.szName, "VBoxNetAdp");
980	pGlobals->SupDrvFactory.pfnQueryFactoryInterface = vboxNetAdpQueryFactoryInterface;
981	}
982
983	return rc;
984	}
985
986	/**
987	* performs the Idc initialization
988	* we separate the globals initialization to globals "base" initialization which is actually
989	* "general" globals initialization except for Idc not being initialized, and idc initialization.
990	* This is needed for windows filter driver, which gets loaded prior to VBoxDrv,
991	* thus it's not possible to make idc initialization from the driver startup routine for it.
992	*
993	* @returns VBox status code.
994	* @param pGlobals Pointer to the globals. */
995	DECLHIDDEN(int) vboxNetAdpInitIdc(PVBOXNETADPGLOBALS pGlobals)
996	{
997	int rc;
998	/*
999	* Establish a connection to SUPDRV and register our component factory.
1000	*/
1001	rc = SUPR0IdcOpen(&pGlobals->SupDrvIDC, 0 /* iReqVersion = default /, 0 / iMinVersion = default */, NULL, NULL, NULL);
1002	if (RT_SUCCESS(rc))
1003	{
1004	rc = SUPR0IdcComponentRegisterFactory(&pGlobals->SupDrvIDC, &pGlobals->SupDrvFactory);
1005	if (RT_SUCCESS(rc))
1006	{
1007	#if 1 /** @todo REMOVE ME! */
1008	PVBOXNETADP pTmp;
1009	rc = vboxNetAdpCreate(&pGlobals->TrunkFactory, &pTmp);
1010	if (RT_FAILURE(rc))
1011	Log(("Failed to create vboxnet0, rc=%Rrc.\n", rc));
1012	#endif
1013	Log(("VBoxNetAdp: pSession=%p\n", SUPR0IdcGetSession(&pGlobals->SupDrvIDC)));
1014	return rc;
1015	}
1016
1017	/* bail out. */
1018	LogRel(("VBoxNetAdp: Failed to register component factory, rc=%Rrc\n", rc));
1019	SUPR0IdcClose(&pGlobals->SupDrvIDC);
1020	}
1021
1022	return rc;
1023	}
1024
1025	/**
1026	* Called by the native driver/kext module initialization routine.
1027	*
1028	* It will initialize the common parts of the globals, assuming the caller
1029	* has already taken care of the OS specific bits.
1030	*
1031	* @returns VBox status code.
1032	* @param pGlobals Pointer to the globals.
1033	*/
1034	DECLHIDDEN(int) vboxNetAdpInitGlobals(PVBOXNETADPGLOBALS pGlobals)
1035	{
1036	/*
1037	* Initialize the common portions of the structure.
1038	*/
1039	int rc = vboxNetAdpInitGlobalsBase(pGlobals);
1040	if (RT_SUCCESS(rc))
1041	{
1042	rc = vboxNetAdpInitIdc(pGlobals);
1043	if (RT_SUCCESS(rc))
1044	{
1045	return rc;
1046	}
1047
1048	/* bail out. */
1049	vboxNetAdpDeleteGlobalsBase(pGlobals);
1050	}
1051
1052	return rc;
1053	}
1054
1055	#else /* !VBOXANETADP_DO_NOT_USE_NETFLT */
1056
1057
1058	VBOXNETADP g_aAdapters[VBOXNETADP_MAX_INSTANCES];
1059	static uint8_t g_aUnits[VBOXNETADP_MAX_UNITS/8];
1060
1061
1062	DECLINLINE(int) vboxNetAdpGetUnitByName(const char *pcszName)
1063	{
1064	uint32_t iUnit = RTStrToUInt32(pcszName + sizeof(VBOXNETADP_NAME) - 1);
1065	bool fOld;
1066
1067	if (iUnit >= VBOXNETADP_MAX_UNITS)
1068	return -1;
1069
1070	fOld = ASMAtomicBitTestAndSet(g_aUnits, iUnit);
1071	return fOld ? -1 : (int)iUnit;
1072	}
1073
1074	DECLINLINE(int) vboxNetAdpGetNextAvailableUnit(void)
1075	{
1076	bool fOld;
1077	int iUnit;
1078	/* There is absolutely no chance that all units are taken */
1079	do {
1080	iUnit = ASMBitFirstClear(g_aUnits, VBOXNETADP_MAX_UNITS);
1081	if (iUnit < 0)
1082	break;
1083	fOld = ASMAtomicBitTestAndSet(g_aUnits, iUnit);
1084	} while (fOld);
1085
1086	return iUnit;
1087	}
1088
1089	DECLINLINE(void) vboxNetAdpReleaseUnit(int iUnit)
1090	{
1091	bool fSet = ASMAtomicBitTestAndClear(g_aUnits, iUnit);
1092	NOREF(fSet);
1093	Assert(fSet);
1094	}
1095
1096	/**
1097	* Generate a suitable MAC address.
1098	*
1099	* @param pThis The instance.
1100	* @param pMac Where to return the MAC address.
1101	*/
1102	DECLHIDDEN(void) vboxNetAdpComposeMACAddress(PVBOXNETADP pThis, PRTMAC pMac)
1103	{
1104	/* Use a locally administered version of the OUI we use for the guest NICs. */
1105	pMac->au8[0] = 0x08 \| 2;
1106	pMac->au8[1] = 0x00;
1107	pMac->au8[2] = 0x27;
1108
1109	pMac->au8[3] = 0; /* pThis->iUnit >> 16; */
1110	pMac->au8[4] = 0; /* pThis->iUnit >> 8; */
1111	pMac->au8[5] = pThis->iUnit;
1112	}
1113
1114	int vboxNetAdpCreate(PVBOXNETADP ppNew, const char pcszName)
1115	{
1116	int rc;
1117	unsigned i;
1118	for (i = 0; i < RT_ELEMENTS(g_aAdapters); i++)
1119	{
1120	PVBOXNETADP pThis = &g_aAdapters[i];
1121
1122	if (ASMAtomicCmpXchgU32((uint32_t volatile *)&pThis->enmState, kVBoxNetAdpState_Transitional, kVBoxNetAdpState_Invalid))
1123	{
1124	RTMAC Mac;
1125	/* Found an empty slot -- use it. */
1126	Log(("vboxNetAdpCreate: found empty slot: %d\n", i));
1127	if (pcszName)
1128	{
1129	Log(("vboxNetAdpCreate: using name: %s\n", pcszName));
1130	pThis->iUnit = vboxNetAdpGetUnitByName(pcszName);
1131	strncpy(pThis->szName, pcszName, sizeof(pThis->szName));
1132	pThis->szName[sizeof(pThis->szName) - 1] = '\0';
1133	}
1134	else
1135	{
1136	pThis->iUnit = vboxNetAdpGetNextAvailableUnit();
1137	pThis->szName[0] = '\0';
1138	}
1139	if (pThis->iUnit < 0)
1140	rc = VERR_INVALID_PARAMETER;
1141	else
1142	{
1143	vboxNetAdpComposeMACAddress(pThis, &Mac);
1144	rc = vboxNetAdpOsCreate(pThis, &Mac);
1145	Log(("vboxNetAdpCreate: pThis=%p pThis->iUnit=%d, pThis->szName=%s\n",
1146	pThis, pThis->iUnit, pThis->szName));
1147	}
1148	if (RT_SUCCESS(rc))
1149	{
1150	*ppNew = pThis;
1151	ASMAtomicWriteU32((uint32_t volatile *)&pThis->enmState, kVBoxNetAdpState_Active);
1152	Log2(("VBoxNetAdpCreate: Created %s\n", g_aAdapters[i].szName));
1153	}
1154	else
1155	{
1156	ASMAtomicWriteU32((uint32_t volatile *)&pThis->enmState, kVBoxNetAdpState_Invalid);
1157	Log(("vboxNetAdpCreate: vboxNetAdpOsCreate failed with '%Rrc'.\n", rc));
1158	}
1159	for (i = 0; i < RT_ELEMENTS(g_aAdapters); i++)
1160	Log2(("VBoxNetAdpCreate: Scanning entry: state=%d unit=%d name=%s\n",
1161	g_aAdapters[i].enmState, g_aAdapters[i].iUnit, g_aAdapters[i].szName));
1162	return rc;
1163	}
1164	}
1165	Log(("vboxNetAdpCreate: no empty slots!\n"));
1166
1167	/* All slots in adapter array are busy. */
1168	return VERR_OUT_OF_RESOURCES;
1169	}
1170
1171	int vboxNetAdpDestroy(PVBOXNETADP pThis)
1172	{
1173	int rc = VINF_SUCCESS;
1174
1175	if (!ASMAtomicCmpXchgU32((uint32_t volatile *)&pThis->enmState, kVBoxNetAdpState_Transitional, kVBoxNetAdpState_Active))
1176	return VERR_INTNET_FLT_IF_BUSY;
1177
1178	Assert(pThis->iUnit >= 0 && pThis->iUnit < VBOXNETADP_MAX_UNITS);
1179	vboxNetAdpOsDestroy(pThis);
1180	vboxNetAdpReleaseUnit(pThis->iUnit);
1181	pThis->iUnit = -1;
1182	pThis->szName[0] = '\0';
1183
1184	ASMAtomicWriteU32((uint32_t volatile *)&pThis->enmState, kVBoxNetAdpState_Invalid);
1185
1186	return rc;
1187	}
1188
1189	int vboxNetAdpInit(void)
1190	{
1191	unsigned i;
1192	/*
1193	* Init common members and call OS-specific init.
1194	*/
1195	memset(g_aUnits, 0, sizeof(g_aUnits));
1196	memset(g_aAdapters, 0, sizeof(g_aAdapters));
1197	for (i = 0; i < RT_ELEMENTS(g_aAdapters); i++)
1198	{
1199	g_aAdapters[i].enmState = kVBoxNetAdpState_Invalid;
1200	g_aAdapters[i].iUnit = -1;
1201	vboxNetAdpOsInit(&g_aAdapters[i]);
1202	}
1203
1204	return VINF_SUCCESS;
1205	}
1206
1207	/**
1208	* Finds an adapter by its name.
1209	*
1210	* @returns Pointer to the instance by the given name. NULL if not found.
1211	* @param pGlobals The globals.
1212	* @param pszName The name of the instance.
1213	*/
1214	PVBOXNETADP vboxNetAdpFindByName(const char *pszName)
1215	{
1216	unsigned i;
1217
1218	for (i = 0; i < RT_ELEMENTS(g_aAdapters); i++)
1219	{
1220	PVBOXNETADP pThis = &g_aAdapters[i];
1221	Log2(("VBoxNetAdp: Scanning entry: state=%d name=%s\n", pThis->enmState, pThis->szName));
1222	if ( strcmp(pThis->szName, pszName) == 0
1223	&& ASMAtomicReadU32((uint32_t volatile *)&pThis->enmState) == kVBoxNetAdpState_Active)
1224	return pThis;
1225	}
1226	return NULL;
1227	}
1228
1229	void vboxNetAdpShutdown(void)
1230	{
1231	unsigned i;
1232
1233	/* Remove virtual adapters */
1234	for (i = 0; i < RT_ELEMENTS(g_aAdapters); i++)
1235	vboxNetAdpDestroy(&g_aAdapters[i]);
1236	}
1237	#endif /* !VBOXANETADP_DO_NOT_USE_NETFLT */

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source: vbox/trunk/src/VBox/HostDrivers/VBoxNetAdp/VBoxNetAdp.c@ 39400

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