VirtualBox

source: vbox/trunk/src/VBox/HostDrivers/VBoxNetAdp/VBoxNetAdp.c@ 35942

Last change on this file since 35942 was 35824, checked in by vboxsync, 14 years ago

netadp: coding style
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File size: 36.8 KB
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1/* $Id: VBoxNetAdp.c 35824 2011-02-02 13:32:03Z 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
67AssertCompileMemberSize(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 */
77DECLINLINE(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 */
91DECLINLINE(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 */
106DECLINLINE(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 */
124DECLINLINE(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 */
145DECLINLINE(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 */
174static 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 */
201DECLHIDDEN(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 */
230DECLHIDDEN(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 */
260DECLHIDDEN(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 */
291DECLHIDDEN(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 */
317DECLHIDDEN(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 */
340DECLHIDDEN(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 */
368DECLHIDDEN(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 */
390DECLHIDDEN(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 */
401static 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 */
442static 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 */
463static 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 */
493static 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 */
534static 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 */
573static 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 */
583static DECLCALLBACK(void) vboxNetAdpPortRetain(PINTNETTRUNKIFPORT pIfPort)
584{
585 PVBOXNETADP pThis = IFPORT_2_VBOXNETADP(pIfPort);
586 vboxNetAdpRetain(pThis);
587}
588
589
590int 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 RTMAC Mac;
605 Assert(ASMAtomicIncU32(&pThis->cRefs) == 1);
606 vboxNetAdpComposeMACAddress(pThis, &Mac);
607 rc = vboxNetAdpOsCreate(pThis, &Mac);
608 *ppNew = pThis;
609 RTSpinlockAcquireNoInts(pThis->hSpinlock, &Tmp);
610 vboxNetAdpSetState(pThis, kVBoxNetAdpState_Available);
611 RTSpinlockReleaseNoInts(pThis->hSpinlock, &Tmp);
612 return rc;
613 }
614 }
615
616 /* All slots in adapter array are busy. */
617 return VERR_OUT_OF_RESOURCES;
618}
619
620int vboxNetAdpDestroy(PVBOXNETADP pThis)
621{
622 int rc = VINF_SUCCESS;
623 RTSPINLOCKTMP Tmp = RTSPINLOCKTMP_INITIALIZER;
624
625 RTSpinlockAcquireNoInts(pThis->hSpinlock, &Tmp);
626 if (vboxNetAdpGetState(pThis) != kVBoxNetAdpState_Available || pThis->cBusy)
627 {
628 RTSpinlockReleaseNoInts(pThis->hSpinlock, &Tmp);
629 return VERR_INTNET_FLT_IF_BUSY;
630 }
631 vboxNetAdpSetState(pThis, kVBoxNetAdpState_Transitional);
632 RTSpinlockReleaseNoInts(pThis->hSpinlock, &Tmp);
633 vboxNetAdpRelease(pThis);
634
635 vboxNetAdpOsDestroy(pThis);
636
637 RTSpinlockAcquireNoInts(pThis->hSpinlock, &Tmp);
638 vboxNetAdpSetState(pThis, kVBoxNetAdpState_Invalid);
639 RTSpinlockReleaseNoInts(pThis->hSpinlock, &Tmp);
640
641 return rc;
642}
643
644/**
645 * Connects the instance to the specified switch port.
646 *
647 * Called while owning the lock. We're ASSUMING that the internal
648 * networking code is already owning an recursive mutex, so, there
649 * will be no deadlocks when vboxNetAdpOsConnectIt calls back into
650 * it for setting preferences.
651 *
652 * @returns VBox status code.
653 * @param pThis The instance.
654 * @param pSwitchPort The port on the internal network 'switch'.
655 * @param ppIfPort Where to return our port interface.
656 */
657static int vboxNetAdpConnectIt(PVBOXNETADP pThis, PINTNETTRUNKSWPORT pSwitchPort, PINTNETTRUNKIFPORT *ppIfPort)
658{
659 int rc;
660
661 /*
662 * Validate state.
663 */
664 Assert(!pThis->cBusy);
665 Assert(vboxNetAdpGetStateWithLock(pThis) == kVBoxNetAdpState_Transitional);
666
667 /*
668 * Do the job.
669 * Note that we're calling the os stuff while owning the semaphore here.
670 */
671 pThis->pSwitchPort = pSwitchPort;
672 rc = vboxNetAdpOsConnectIt(pThis);
673 if (RT_SUCCESS(rc))
674 {
675 *ppIfPort = &pThis->MyPort;
676 }
677 else
678 pThis->pSwitchPort = NULL;
679
680 return rc;
681}
682
683
684/**
685 * @copydoc INTNETTRUNKFACTORY::pfnCreateAndConnect
686 */
687static DECLCALLBACK(int) vboxNetAdpFactoryCreateAndConnect(PINTNETTRUNKFACTORY pIfFactory, const char *pszName,
688 PINTNETTRUNKSWPORT pSwitchPort, uint32_t fFlags,
689 PINTNETTRUNKIFPORT *ppIfPort)
690{
691 PVBOXNETADPGLOBALS pGlobals = (PVBOXNETADPGLOBALS)((uint8_t *)pIfFactory - RT_OFFSETOF(VBOXNETADPGLOBALS, TrunkFactory));
692 PVBOXNETADP pThis;
693 int rc;
694
695 LogFlow(("vboxNetAdpFactoryCreateAndConnect: pszName=%p:{%s} fFlags=%#x\n", pszName, pszName, fFlags));
696 Assert(pGlobals->cFactoryRefs > 0);
697 AssertMsgReturn(!fFlags,
698 ("%#x\n", fFlags), VERR_INVALID_PARAMETER);
699
700 /*
701 * Find instance, check if busy, connect if not.
702 */
703 pThis = vboxNetAdpFind(pGlobals, pszName);
704 if (pThis)
705 {
706 if (vboxNetAdpCheckAndSetState(pThis, kVBoxNetAdpState_Available, kVBoxNetAdpState_Transitional))
707 {
708 vboxNetAdpRetain(pThis);
709 rc = vboxNetAdpConnectIt(pThis, pSwitchPort, ppIfPort);
710 vboxNetAdpSetStateWithLock(pThis, RT_SUCCESS(rc) ? kVBoxNetAdpState_Connected : kVBoxNetAdpState_Available);
711 }
712 else
713 rc = VERR_INTNET_FLT_IF_BUSY;
714 }
715 else
716 rc = VERR_INTNET_FLT_IF_NOT_FOUND;
717
718 return rc;
719}
720
721
722/**
723 * @copydoc INTNETTRUNKFACTORY::pfnRelease
724 */
725static DECLCALLBACK(void) vboxNetAdpFactoryRelease(PINTNETTRUNKFACTORY pIfFactory)
726{
727 PVBOXNETADPGLOBALS pGlobals = (PVBOXNETADPGLOBALS)((uint8_t *)pIfFactory - RT_OFFSETOF(VBOXNETADPGLOBALS, TrunkFactory));
728
729 int32_t cRefs = ASMAtomicDecS32(&pGlobals->cFactoryRefs);
730 Assert(cRefs >= 0); NOREF(cRefs);
731 LogFlow(("vboxNetAdpFactoryRelease: cRefs=%d (new)\n", cRefs));
732}
733
734
735/**
736 * Implements the SUPDRV component factor interface query method.
737 *
738 * @returns Pointer to an interface. NULL if not supported.
739 *
740 * @param pSupDrvFactory Pointer to the component factory registration structure.
741 * @param pSession The session - unused.
742 * @param pszInterfaceUuid The factory interface id.
743 */
744static DECLCALLBACK(void *) vboxNetAdpQueryFactoryInterface(PCSUPDRVFACTORY pSupDrvFactory, PSUPDRVSESSION pSession, const char *pszInterfaceUuid)
745{
746 PVBOXNETADPGLOBALS pGlobals = (PVBOXNETADPGLOBALS)((uint8_t *)pSupDrvFactory - RT_OFFSETOF(VBOXNETADPGLOBALS, SupDrvFactory));
747
748 /*
749 * Convert the UUID strings and compare them.
750 */
751 RTUUID UuidReq;
752 int rc = RTUuidFromStr(&UuidReq, pszInterfaceUuid);
753 if (RT_SUCCESS(rc))
754 {
755 if (!RTUuidCompareStr(&UuidReq, INTNETTRUNKFACTORY_UUID_STR))
756 {
757 ASMAtomicIncS32(&pGlobals->cFactoryRefs);
758 return &pGlobals->TrunkFactory;
759 }
760#ifdef LOG_ENABLED
761 else
762 Log(("VBoxNetAdp: unknown factory interface query (%s)\n", pszInterfaceUuid));
763#endif
764 }
765 else
766 Log(("VBoxNetAdp: rc=%Rrc, uuid=%s\n", rc, pszInterfaceUuid));
767
768 return NULL;
769}
770
771
772/**
773 * Checks whether the VBoxNetAdp wossname can be unloaded.
774 *
775 * This will return false if someone is currently using the module.
776 *
777 * @returns true if it's relatively safe to unload it, otherwise false.
778 * @param pGlobals Pointer to the globals.
779 */
780DECLHIDDEN(bool) vboxNetAdpCanUnload(PVBOXNETADPGLOBALS pGlobals)
781{
782 bool fRc = true; /* Assume it can be unloaded. */
783 unsigned i;
784
785 for (i = 0; i < RT_ELEMENTS(pGlobals->aAdapters); i++)
786 {
787 PVBOXNETADP pThis = &pGlobals->aAdapters[i];
788 if (vboxNetAdpGetStateWithLock(&pGlobals->aAdapters[i]) >= kVBoxNetAdpState_Connected)
789 {
790 fRc = false;
791 break; /* We already know the answer. */
792 }
793 }
794 return fRc && ASMAtomicUoReadS32((int32_t volatile *)&pGlobals->cFactoryRefs) <= 0;
795}
796
797/**
798 * tries to deinitialize Idc
799 * we separate the globals settings "base" which is actually
800 * "general" globals settings except for Idc, and idc.
801 * This is needed for windows filter driver, which gets loaded prior to VBoxDrv,
802 * thus it's not possible to make idc initialization from the driver startup routine for it,
803 * though the "base is still needed for the driver to functions".
804 * @param pGlobals
805 * @return VINF_SUCCESS on success, VERR_WRONG_ORDER if we're busy.
806 */
807DECLHIDDEN(int) vboxNetAdpTryDeleteIdc(PVBOXNETADPGLOBALS pGlobals)
808{
809 int rc;
810
811 Assert(pGlobals->hFastMtx != NIL_RTSEMFASTMUTEX);
812
813 /*
814 * Check before trying to deregister the factory.
815 */
816 if (!vboxNetAdpCanUnload(pGlobals))
817 return VERR_WRONG_ORDER;
818
819 /*
820 * Disconnect from SUPDRV and check that nobody raced us,
821 * reconnect if that should happen.
822 */
823 rc = SUPR0IdcComponentDeregisterFactory(&pGlobals->SupDrvIDC, &pGlobals->SupDrvFactory);
824 AssertRC(rc);
825 if (!vboxNetAdpCanUnload(pGlobals))
826 {
827 rc = SUPR0IdcComponentRegisterFactory(&pGlobals->SupDrvIDC, &pGlobals->SupDrvFactory);
828 AssertRC(rc);
829 return VERR_WRONG_ORDER;
830 }
831
832 SUPR0IdcClose(&pGlobals->SupDrvIDC);
833
834 return rc;
835}
836
837static int vboxNetAdpSlotCreate(PVBOXNETADPGLOBALS pGlobals, unsigned uUnit, PVBOXNETADP pNew)
838{
839 int rc;
840
841 pNew->MyPort.u32Version = INTNETTRUNKIFPORT_VERSION;
842 pNew->MyPort.pfnRetain = vboxNetAdpPortRetain;
843 pNew->MyPort.pfnRelease = vboxNetAdpPortRelease;
844 pNew->MyPort.pfnDisconnectAndRelease= vboxNetAdpPortDisconnectAndRelease;
845 pNew->MyPort.pfnSetState = vboxNetAdpPortSetState;
846 pNew->MyPort.pfnWaitForIdle = vboxNetAdpPortWaitForIdle;
847 pNew->MyPort.pfnXmit = vboxNetAdpPortXmit;
848 pNew->MyPort.u32VersionEnd = INTNETTRUNKIFPORT_VERSION;
849 pNew->pSwitchPort = NULL;
850 pNew->pGlobals = pGlobals;
851 pNew->hSpinlock = NIL_RTSPINLOCK;
852 pNew->enmState = kVBoxNetAdpState_Invalid;
853 pNew->cRefs = 0;
854 pNew->cBusy = 0;
855 pNew->hEventIdle = NIL_RTSEMEVENT;
856
857 rc = RTSpinlockCreate(&pNew->hSpinlock);
858 if (RT_SUCCESS(rc))
859 {
860 rc = RTSemEventCreate(&pNew->hEventIdle);
861 if (RT_SUCCESS(rc))
862 {
863 rc = vboxNetAdpOsInit(pNew);
864 if (RT_SUCCESS(rc))
865 {
866 return rc;
867 }
868 RTSemEventDestroy(pNew->hEventIdle);
869 pNew->hEventIdle = NIL_RTSEMEVENT;
870 }
871 RTSpinlockDestroy(pNew->hSpinlock);
872 pNew->hSpinlock = NIL_RTSPINLOCK;
873 }
874 return rc;
875}
876
877static void vboxNetAdpSlotDestroy(PVBOXNETADP pThis)
878{
879 Assert(pThis->cRefs == 0);
880 Assert(pThis->cBusy == 0);
881 Assert(vboxNetAdpGetState(pThis) == kVBoxNetAdpState_Invalid);
882 if (pThis->hEventIdle != NIL_RTSEMEVENT)
883 {
884 RTSemEventDestroy(pThis->hEventIdle);
885 pThis->hEventIdle = NIL_RTSEMEVENT;
886 }
887 if (pThis->hSpinlock != NIL_RTSPINLOCK)
888 {
889 RTSpinlockDestroy(pThis->hSpinlock);
890 pThis->hSpinlock = NIL_RTSPINLOCK;
891 }
892}
893
894/**
895 * performs "base" globals deinitialization
896 * we separate the globals settings "base" which is actually
897 * "general" globals settings except for Idc, and idc.
898 * This is needed for windows filter driver, which gets loaded prior to VBoxDrv,
899 * thus it's not possible to make idc initialization from the driver startup routine for it,
900 * though the "base is still needed for the driver to functions".
901 * @param pGlobals
902 * @return none
903 */
904DECLHIDDEN(void) vboxNetAdpDeleteGlobalsBase(PVBOXNETADPGLOBALS pGlobals)
905{
906 int i;
907 /*
908 * Release resources.
909 */
910 for (i = 0; i < (int)RT_ELEMENTS(pGlobals->aAdapters); i++)
911 if (RT_SUCCESS(vboxNetAdpDestroy(&pGlobals->aAdapters[i])))
912 vboxNetAdpSlotDestroy(&pGlobals->aAdapters[i]);
913
914 RTSemFastMutexDestroy(pGlobals->hFastMtx);
915 pGlobals->hFastMtx = NIL_RTSEMFASTMUTEX;
916
917#ifdef VBOXNETADP_STATIC_CONFIG
918 RTSemEventDestroy(pGlobals->hTimerEvent);
919 pGlobals->hTimerEvent = NIL_RTSEMEVENT;
920#endif
921
922}
923
924
925/**
926 * Called by the native part when the OS wants the driver to unload.
927 *
928 * @returns VINF_SUCCESS on success, VERR_WRONG_ORDER if we're busy.
929 *
930 * @param pGlobals Pointer to the globals.
931 */
932DECLHIDDEN(int) vboxNetAdpTryDeleteGlobals(PVBOXNETADPGLOBALS pGlobals)
933{
934 int rc = vboxNetAdpTryDeleteIdc(pGlobals);
935 if (RT_SUCCESS(rc))
936 {
937 vboxNetAdpDeleteGlobalsBase(pGlobals);
938 }
939 return rc;
940}
941
942
943/**
944 * performs the "base" globals initialization
945 * we separate the globals initialization to globals "base" initialization which is actually
946 * "general" globals initialization except for Idc not being initialized, and idc initialization.
947 * This is needed for windows filter driver, which gets loaded prior to VBoxDrv,
948 * thus it's not possible to make idc initialization from the driver startup routine for it.
949 *
950 * @returns VBox status code.
951 * @param pGlobals Pointer to the globals. */
952DECLHIDDEN(int) vboxNetAdpInitGlobalsBase(PVBOXNETADPGLOBALS pGlobals)
953{
954 /*
955 * Initialize the common portions of the structure.
956 */
957 int i;
958 int rc = RTSemFastMutexCreate(&pGlobals->hFastMtx);
959 if (RT_SUCCESS(rc))
960 {
961 memset(pGlobals->aAdapters, 0, sizeof(pGlobals->aAdapters));
962 for (i = 0; i < (int)RT_ELEMENTS(pGlobals->aAdapters); i++)
963 {
964 rc = vboxNetAdpSlotCreate(pGlobals, i, &pGlobals->aAdapters[i]);
965 if (RT_FAILURE(rc))
966 {
967 /* Clean up. */
968 while (--i >= 0)
969 vboxNetAdpSlotDestroy(&pGlobals->aAdapters[i]);
970 Log(("vboxNetAdpInitGlobalsBase: Failed to create fast mutex (rc=%Rrc).\n", rc));
971 RTSemFastMutexDestroy(pGlobals->hFastMtx);
972 return rc;
973 }
974 }
975 pGlobals->TrunkFactory.pfnRelease = vboxNetAdpFactoryRelease;
976 pGlobals->TrunkFactory.pfnCreateAndConnect = vboxNetAdpFactoryCreateAndConnect;
977
978 strcpy(pGlobals->SupDrvFactory.szName, "VBoxNetAdp");
979 pGlobals->SupDrvFactory.pfnQueryFactoryInterface = vboxNetAdpQueryFactoryInterface;
980 }
981
982 return rc;
983}
984
985/**
986 * performs the Idc initialization
987 * we separate the globals initialization to globals "base" initialization which is actually
988 * "general" globals initialization except for Idc not being initialized, and idc initialization.
989 * This is needed for windows filter driver, which gets loaded prior to VBoxDrv,
990 * thus it's not possible to make idc initialization from the driver startup routine for it.
991 *
992 * @returns VBox status code.
993 * @param pGlobals Pointer to the globals. */
994DECLHIDDEN(int) vboxNetAdpInitIdc(PVBOXNETADPGLOBALS pGlobals)
995{
996 int rc;
997 /*
998 * Establish a connection to SUPDRV and register our component factory.
999 */
1000 rc = SUPR0IdcOpen(&pGlobals->SupDrvIDC, 0 /* iReqVersion = default */, 0 /* iMinVersion = default */, NULL, NULL, NULL);
1001 if (RT_SUCCESS(rc))
1002 {
1003 rc = SUPR0IdcComponentRegisterFactory(&pGlobals->SupDrvIDC, &pGlobals->SupDrvFactory);
1004 if (RT_SUCCESS(rc))
1005 {
1006#if 1 /** @todo REMOVE ME! */
1007 PVBOXNETADP pTmp;
1008 rc = vboxNetAdpCreate(&pGlobals->TrunkFactory, &pTmp);
1009 if (RT_FAILURE(rc))
1010 Log(("Failed to create vboxnet0, rc=%Rrc.\n", rc));
1011#endif
1012 Log(("VBoxNetAdp: pSession=%p\n", SUPR0IdcGetSession(&pGlobals->SupDrvIDC)));
1013 return rc;
1014 }
1015
1016 /* bail out. */
1017 LogRel(("VBoxNetAdp: Failed to register component factory, rc=%Rrc\n", rc));
1018 SUPR0IdcClose(&pGlobals->SupDrvIDC);
1019 }
1020
1021 return rc;
1022}
1023
1024/**
1025 * Called by the native driver/kext module initialization routine.
1026 *
1027 * It will initialize the common parts of the globals, assuming the caller
1028 * has already taken care of the OS specific bits.
1029 *
1030 * @returns VBox status code.
1031 * @param pGlobals Pointer to the globals.
1032 */
1033DECLHIDDEN(int) vboxNetAdpInitGlobals(PVBOXNETADPGLOBALS pGlobals)
1034{
1035 /*
1036 * Initialize the common portions of the structure.
1037 */
1038 int rc = vboxNetAdpInitGlobalsBase(pGlobals);
1039 if (RT_SUCCESS(rc))
1040 {
1041 rc = vboxNetAdpInitIdc(pGlobals);
1042 if (RT_SUCCESS(rc))
1043 {
1044 return rc;
1045 }
1046
1047 /* bail out. */
1048 vboxNetAdpDeleteGlobalsBase(pGlobals);
1049 }
1050
1051 return rc;
1052}
1053
1054#else /* !VBOXANETADP_DO_NOT_USE_NETFLT */
1055
1056
1057VBOXNETADP g_aAdapters[VBOXNETADP_MAX_INSTANCES];
1058static uint8_t g_aUnits[VBOXNETADP_MAX_UNITS/8];
1059
1060
1061DECLINLINE(int) vboxNetAdpGetUnitByName(const char *pcszName)
1062{
1063 uint32_t iUnit = RTStrToUInt32(pcszName + sizeof(VBOXNETADP_NAME) - 1);
1064 bool fOld;
1065
1066 if (iUnit >= VBOXNETADP_MAX_UNITS)
1067 return -1;
1068
1069 fOld = ASMAtomicBitTestAndSet(g_aUnits, iUnit);
1070 return fOld ? -1 : (int)iUnit;
1071}
1072
1073DECLINLINE(int) vboxNetAdpGetNextAvailableUnit(void)
1074{
1075 bool fOld;
1076 int iUnit;
1077 /* There is absolutely no chance that all units are taken */
1078 do {
1079 iUnit = ASMBitFirstClear(g_aUnits, VBOXNETADP_MAX_UNITS);
1080 if (iUnit < 0)
1081 break;
1082 fOld = ASMAtomicBitTestAndSet(g_aUnits, iUnit);
1083 } while (fOld);
1084
1085 return iUnit;
1086}
1087
1088DECLINLINE(void) vboxNetAdpReleaseUnit(int iUnit)
1089{
1090 Assert(ASMAtomicBitTestAndClear(g_aUnits, iUnit));
1091}
1092
1093/**
1094 * Generate a suitable MAC address.
1095 *
1096 * @param pThis The instance.
1097 * @param pMac Where to return the MAC address.
1098 */
1099DECLHIDDEN(void) vboxNetAdpComposeMACAddress(PVBOXNETADP pThis, PRTMAC pMac)
1100{
1101 /* Use a locally administered version of the OUI we use for the guest NICs. */
1102 pMac->au8[0] = 0x08 | 2;
1103 pMac->au8[1] = 0x00;
1104 pMac->au8[2] = 0x27;
1105
1106 pMac->au8[3] = 0; /* pThis->iUnit >> 16; */
1107 pMac->au8[4] = 0; /* pThis->iUnit >> 8; */
1108 pMac->au8[5] = pThis->iUnit;
1109}
1110
1111int vboxNetAdpCreate(PVBOXNETADP *ppNew, const char *pcszName)
1112{
1113 int rc;
1114 unsigned i;
1115 for (i = 0; i < RT_ELEMENTS(g_aAdapters); i++)
1116 {
1117 PVBOXNETADP pThis = &g_aAdapters[i];
1118
1119 if (ASMAtomicCmpXchgU32((uint32_t volatile *)&pThis->enmState, kVBoxNetAdpState_Transitional, kVBoxNetAdpState_Invalid))
1120 {
1121 RTMAC Mac;
1122 /* Found an empty slot -- use it. */
1123 Log(("vboxNetAdpCreate: found empty slot: %d\n", i));
1124 if (pcszName)
1125 {
1126 Log(("vboxNetAdpCreate: using name: %s\n", pcszName));
1127 pThis->iUnit = vboxNetAdpGetUnitByName(pcszName);
1128 strncpy(pThis->szName, pcszName, sizeof(pThis->szName));
1129 pThis->szName[sizeof(pThis->szName) - 1] = '\0';
1130 }
1131 else
1132 {
1133 pThis->iUnit = vboxNetAdpGetNextAvailableUnit();
1134 pThis->szName[0] = '\0';
1135 }
1136 if (pThis->iUnit < 0)
1137 rc = VERR_INVALID_PARAMETER;
1138 else
1139 {
1140 vboxNetAdpComposeMACAddress(pThis, &Mac);
1141 rc = vboxNetAdpOsCreate(pThis, &Mac);
1142 Log(("vboxNetAdpCreate: pThis=%p pThis->iUnit=%d, pThis->szName=%s\n",
1143 pThis, pThis->iUnit, pThis->szName));
1144 }
1145 if (RT_SUCCESS(rc))
1146 {
1147 *ppNew = pThis;
1148 ASMAtomicWriteU32((uint32_t volatile *)&pThis->enmState, kVBoxNetAdpState_Active);
1149 Log2(("VBoxNetAdpCreate: Created %s\n", g_aAdapters[i].szName));
1150 }
1151 else
1152 {
1153 ASMAtomicWriteU32((uint32_t volatile *)&pThis->enmState, kVBoxNetAdpState_Invalid);
1154 Log(("vboxNetAdpCreate: vboxNetAdpOsCreate failed with '%Rrc'.\n", rc));
1155 }
1156 for (i = 0; i < RT_ELEMENTS(g_aAdapters); i++)
1157 Log2(("VBoxNetAdpCreate: Scanning entry: state=%d unit=%d name=%s\n",
1158 g_aAdapters[i].enmState, g_aAdapters[i].iUnit, g_aAdapters[i].szName));
1159 return rc;
1160 }
1161 }
1162 Log(("vboxNetAdpCreate: no empty slots!\n"));
1163
1164 /* All slots in adapter array are busy. */
1165 return VERR_OUT_OF_RESOURCES;
1166}
1167
1168int vboxNetAdpDestroy(PVBOXNETADP pThis)
1169{
1170 int rc = VINF_SUCCESS;
1171
1172 if (!ASMAtomicCmpXchgU32((uint32_t volatile *)&pThis->enmState, kVBoxNetAdpState_Transitional, kVBoxNetAdpState_Active))
1173 return VERR_INTNET_FLT_IF_BUSY;
1174
1175 Assert(pThis->iUnit >= 0 && pThis->iUnit < VBOXNETADP_MAX_UNITS);
1176 vboxNetAdpOsDestroy(pThis);
1177 vboxNetAdpReleaseUnit(pThis->iUnit);
1178 pThis->iUnit = -1;
1179 pThis->szName[0] = '\0';
1180
1181 ASMAtomicWriteU32((uint32_t volatile *)&pThis->enmState, kVBoxNetAdpState_Invalid);
1182
1183 return rc;
1184}
1185
1186int vboxNetAdpInit(void)
1187{
1188 unsigned i;
1189 /*
1190 * Init common members and call OS-specific init.
1191 */
1192 memset(g_aUnits, 0, sizeof(g_aUnits));
1193 memset(g_aAdapters, 0, sizeof(g_aAdapters));
1194 for (i = 0; i < RT_ELEMENTS(g_aAdapters); i++)
1195 {
1196 g_aAdapters[i].enmState = kVBoxNetAdpState_Invalid;
1197 g_aAdapters[i].iUnit = -1;
1198 vboxNetAdpOsInit(&g_aAdapters[i]);
1199 }
1200
1201 return VINF_SUCCESS;
1202}
1203
1204/**
1205 * Finds an adapter by its name.
1206 *
1207 * @returns Pointer to the instance by the given name. NULL if not found.
1208 * @param pGlobals The globals.
1209 * @param pszName The name of the instance.
1210 */
1211PVBOXNETADP vboxNetAdpFindByName(const char *pszName)
1212{
1213 unsigned i;
1214
1215 for (i = 0; i < RT_ELEMENTS(g_aAdapters); i++)
1216 {
1217 PVBOXNETADP pThis = &g_aAdapters[i];
1218 Log2(("VBoxNetAdp: Scanning entry: state=%d name=%s\n", pThis->enmState, pThis->szName));
1219 if ( strcmp(pThis->szName, pszName) == 0
1220 && ASMAtomicReadU32((uint32_t volatile *)&pThis->enmState) == kVBoxNetAdpState_Active)
1221 return pThis;
1222 }
1223 return NULL;
1224}
1225
1226void vboxNetAdpShutdown(void)
1227{
1228 unsigned i;
1229
1230 /* Remove virtual adapters */
1231 for (i = 0; i < RT_ELEMENTS(g_aAdapters); i++)
1232 vboxNetAdpDestroy(&g_aAdapters[i]);
1233}
1234#endif /* !VBOXANETADP_DO_NOT_USE_NETFLT */
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