VBoxNetFlt-darwin.cpp@ 48952

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1	/* $Id: VBoxNetFlt-darwin.cpp 48952 2013-10-07 21:54:31Z vboxsync $ */
2	/** @file
3	* VBoxNetFlt - Network Filter Driver (Host), Darwin Specific Code.
4	*/
5
6	/*
7	* Copyright (C) 2006-2012 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	/*******************************************************************************
19	* Header Files *
20	*******************************************************************************/
21	/*
22	* Deal with conflicts first.
23	* PVM - BSD mess, that FreeBSD has correct a long time ago.
24	* iprt/types.h before sys/param.h - prevents UINT32_C and friends.
25	*/
26	#include <iprt/types.h>
27	#include <sys/param.h>
28	#undef PVM
29
30	#include <IOKit/IOLib.h> /* Assert as function */
31
32	#define LOG_GROUP LOG_GROUP_NET_FLT_DRV
33	#include <VBox/log.h>
34	#include <VBox/err.h>
35	#include <VBox/intnetinline.h>
36	#include <VBox/version.h>
37	#include <iprt/initterm.h>
38	#include <iprt/assert.h>
39	#include <iprt/spinlock.h>
40	#include <iprt/semaphore.h>
41	#include <iprt/process.h>
42	#include <iprt/alloc.h>
43	#include <iprt/alloca.h>
44	#include <iprt/time.h>
45	#include <iprt/net.h>
46
47	#include <mach/kmod.h>
48	#include <sys/conf.h>
49	#include <sys/errno.h>
50	#include <sys/ioccom.h>
51	#include <sys/malloc.h>
52	#include <sys/proc.h>
53	#include <sys/socket.h>
54	#include <sys/sockio.h>
55	#include <sys/kern_event.h>
56	#include <net/kpi_interface.h>
57	RT_C_DECLS_BEGIN /* Buggy 10.4 headers, fixed in 10.5. */
58	#include <sys/kpi_mbuf.h>
59	#include <net/kpi_interfacefilter.h>
60	RT_C_DECLS_END
61	#include <net/if.h>
62
63	#define VBOXNETFLT_OS_SPECFIC 1
64	#include "../VBoxNetFltInternal.h"
65
66
67	/*******************************************************************************
68	* Defined Constants And Macros *
69	*******************************************************************************/
70	/** The maximum number of SG segments.
71	* Used to prevent stack overflow and similar bad stuff. */
72	#define VBOXNETFLT_DARWIN_MAX_SEGS 32
73
74	#if 0
75	/** For testing extremely segmented frames. */
76	#define VBOXNETFLT_DARWIN_TEST_SEG_SIZE 14
77	#endif
78
79
80	/*******************************************************************************
81	* Internal Functions *
82	*******************************************************************************/
83	RT_C_DECLS_BEGIN
84	static kern_return_t VBoxNetFltDarwinStart(struct kmod_info pKModInfo, void pvData);
85	static kern_return_t VBoxNetFltDarwinStop(struct kmod_info pKModInfo, void pvData);
86	RT_C_DECLS_END
87
88
89	/*******************************************************************************
90	* Structures and Typedefs *
91	*******************************************************************************/
92	/**
93	* The mbuf tag data.
94	*
95	* We have to associate the ethernet header with each packet we're sending
96	* because things like icmp will inherit the tag it self so the tag along
97	* isn't sufficient to identify our mbufs. For the icmp scenario the ethernet
98	* header naturally changes before the packet is send pack, so let check it.
99	*/
100	typedef struct VBOXNETFLTTAG
101	{
102	/** The ethernet header of the outgoing frame. */
103	RTNETETHERHDR EthHdr;
104	} VBOXNETFLTTAG;
105	/** Pointer to a VBoxNetFlt mbuf tag. */
106	typedef VBOXNETFLTTAG *PVBOXNETFLTTAG;
107	/** Pointer to a const VBoxNetFlt mbuf tag. */
108	typedef VBOXNETFLTTAG const *PCVBOXNETFLTTAG;
109
110
111	/*******************************************************************************
112	* Global Variables *
113	*******************************************************************************/
114	/**
115	* Declare the module stuff.
116	*/
117	RT_C_DECLS_BEGIN
118	extern kern_return_t _start(struct kmod_info pKModInfo, void pvData);
119	extern kern_return_t _stop(struct kmod_info pKModInfo, void pvData);
120
121	KMOD_EXPLICIT_DECL(VBoxNetFlt, VBOX_VERSION_STRING, _start, _stop)
122	DECLHIDDEN(kmod_start_func_t *) _realmain = VBoxNetFltDarwinStart;
123	DECLHIDDEN(kmod_stop_func_t *) _antimain = VBoxNetFltDarwinStop;
124	DECLHIDDEN(int) _kext_apple_cc = __APPLE_CC__;
125	RT_C_DECLS_END
126
127
128	/**
129	* The (common) global data.
130	*/
131	static VBOXNETFLTGLOBALS g_VBoxNetFltGlobals;
132
133	/** The unique tag id for this module.
134	* This is basically a unique string hash that lives on until reboot.
135	* It is used for tagging mbufs. */
136	static mbuf_tag_id_t g_idTag;
137
138	/** the offset of the struct ifnet::if_pcount variable. */
139	static unsigned g_offIfNetPCount = sizeof(void ) (1 /if_softc/ + 1 /if_name/ + 2 /if_link/ + 2 /if_addrhead/ + 1 /if_check_multi/)
140	+ sizeof(u_long) /if_refcnt/;
141	/** Macro for accessing ifnet::if_pcount. */
142	#define VBOX_GET_PCOUNT(pIfNet) ( (int )((uintptr_t)pIfNet + g_offIfNetPCount) )
143
144
145	/**
146	* Start the kernel module.
147	*/
148	static kern_return_t VBoxNetFltDarwinStart(struct kmod_info pKModInfo, void pvData)
149	{
150	int rc;
151
152	/*
153	* Initialize IPRT and find our module tag id.
154	* (IPRT is shared with VBoxDrv, it creates the loggers.)
155	*/
156	rc = RTR0Init(0);
157	if (RT_SUCCESS(rc))
158	{
159	Log(("VBoxNetFltDarwinStart\n"));
160	errno_t err = mbuf_tag_id_find("org.VirtualBox.kext.VBoxFltDrv", &g_idTag);
161	if (!err)
162	{
163	/*
164	* Initialize the globals and connect to the support driver.
165	*
166	* This will call back vboxNetFltOsOpenSupDrv (and maybe vboxNetFltOsCloseSupDrv)
167	* for establishing the connect to the support driver.
168	*/
169	memset(&g_VBoxNetFltGlobals, 0, sizeof(g_VBoxNetFltGlobals));
170	rc = vboxNetFltInitGlobalsAndIdc(&g_VBoxNetFltGlobals);
171	if (RT_SUCCESS(rc))
172	{
173	LogRel(("VBoxFltDrv: version " VBOX_VERSION_STRING " r%d\n", VBOX_SVN_REV));
174	return KMOD_RETURN_SUCCESS;
175	}
176
177	LogRel(("VBoxFltDrv: failed to initialize device extension (rc=%d)\n", rc));
178	}
179	else
180	LogRel(("VBoxFltDrv: mbuf_tag_id_find failed, err=%d\n", err));
181	RTR0Term();
182	}
183	else
184	printf("VBoxFltDrv: failed to initialize IPRT (rc=%d)\n", rc);
185
186	memset(&g_VBoxNetFltGlobals, 0, sizeof(g_VBoxNetFltGlobals));
187	return KMOD_RETURN_FAILURE;
188	}
189
190
191	/**
192	* Stop the kernel module.
193	*/
194	static kern_return_t VBoxNetFltDarwinStop(struct kmod_info pKModInfo, void pvData)
195	{
196	Log(("VBoxNetFltDarwinStop\n"));
197
198	/*
199	* Refuse to unload if anyone is currently using the filter driver.
200	* This is important as I/O kit / xnu will to be able to do usage
201	* tracking for us!
202	*/
203	int rc = vboxNetFltTryDeleteIdcAndGlobals(&g_VBoxNetFltGlobals);
204	if (RT_FAILURE(rc))
205	{
206	Log(("VBoxNetFltDarwinStop - failed, busy.\n"));
207	return KMOD_RETURN_FAILURE;
208	}
209
210	/*
211	* Undo the work done during start (in reverse order).
212	*/
213	memset(&g_VBoxNetFltGlobals, 0, sizeof(g_VBoxNetFltGlobals));
214
215	RTR0Term();
216
217	return KMOD_RETURN_SUCCESS;
218	}
219
220
221	/**
222	* Reads and retains the host interface handle.
223	*
224	* @returns The handle, NULL if detached.
225	* @param pThis
226	*/
227	DECLINLINE(ifnet_t) vboxNetFltDarwinRetainIfNet(PVBOXNETFLTINS pThis)
228	{
229	ifnet_t pIfNet = NULL;
230
231	/*
232	* Be careful here to avoid problems racing the detached callback.
233	*/
234	RTSpinlockAcquire(pThis->hSpinlock);
235	if (!ASMAtomicUoReadBool(&pThis->fDisconnectedFromHost))
236	{
237	pIfNet = ASMAtomicUoReadPtrT(&pThis->u.s.pIfNet, ifnet_t);
238	if (pIfNet)
239	ifnet_reference(pIfNet);
240	}
241	RTSpinlockReleaseNoInts(pThis->hSpinlock);
242
243	return pIfNet;
244	}
245
246
247	/**
248	* Release the host interface handle previously retained
249	* by vboxNetFltDarwinRetainIfNet.
250	*
251	* @param pThis The instance.
252	* @param pIfNet The vboxNetFltDarwinRetainIfNet return value, NULL is fine.
253	*/
254	DECLINLINE(void) vboxNetFltDarwinReleaseIfNet(PVBOXNETFLTINS pThis, ifnet_t pIfNet)
255	{
256	NOREF(pThis);
257	if (pIfNet)
258	ifnet_release(pIfNet);
259	}
260
261
262	/**
263	* Checks whether this is an mbuf created by vboxNetFltDarwinMBufFromSG,
264	* i.e. a buffer which we're pushing and should be ignored by the filter callbacks.
265	*
266	* @returns true / false accordingly.
267	* @param pThis The instance.
268	* @param pMBuf The mbuf.
269	* @param pvFrame The frame pointer, optional.
270	*/
271	DECLINLINE(bool) vboxNetFltDarwinMBufIsOur(PVBOXNETFLTINS pThis, mbuf_t pMBuf, void *pvFrame)
272	{
273	NOREF(pThis);
274
275	/*
276	* Lookup the tag set by vboxNetFltDarwinMBufFromSG.
277	*/
278	PCVBOXNETFLTTAG pTagData;
279	size_t cbTagData;
280	errno_t err = mbuf_tag_find(pMBuf, g_idTag, 0 /* type /, &cbTagData, (void *)&pTagData);
281	if (err)
282	return false;
283	AssertReturn(cbTagData == sizeof(*pTagData), false);
284
285	/*
286	* Dig out the ethernet header from the mbuf.
287	*/
288	PCRTNETETHERHDR pEthHdr = (PCRTNETETHERHDR)pvFrame;
289	if (!pEthHdr)
290	pEthHdr = (PCRTNETETHERHDR)mbuf_pkthdr_header(pMBuf);
291	if (!pEthHdr)
292	pEthHdr = (PCRTNETETHERHDR)mbuf_data(pMBuf);
293	/* ASSUMING that there is enough data to work on! */
294	if ( pEthHdr->DstMac.au8[0] != pTagData->EthHdr.DstMac.au8[0]
295	\|\| pEthHdr->DstMac.au8[1] != pTagData->EthHdr.DstMac.au8[1]
296	\|\| pEthHdr->DstMac.au8[2] != pTagData->EthHdr.DstMac.au8[2]
297	\|\| pEthHdr->DstMac.au8[3] != pTagData->EthHdr.DstMac.au8[3]
298	\|\| pEthHdr->DstMac.au8[4] != pTagData->EthHdr.DstMac.au8[4]
299	\|\| pEthHdr->DstMac.au8[5] != pTagData->EthHdr.DstMac.au8[5]
300	\|\| pEthHdr->SrcMac.au8[0] != pTagData->EthHdr.SrcMac.au8[0]
301	\|\| pEthHdr->SrcMac.au8[1] != pTagData->EthHdr.SrcMac.au8[1]
302	\|\| pEthHdr->SrcMac.au8[2] != pTagData->EthHdr.SrcMac.au8[2]
303	\|\| pEthHdr->SrcMac.au8[3] != pTagData->EthHdr.SrcMac.au8[3]
304	\|\| pEthHdr->SrcMac.au8[4] != pTagData->EthHdr.SrcMac.au8[4]
305	\|\| pEthHdr->SrcMac.au8[5] != pTagData->EthHdr.SrcMac.au8[5]
306	\|\| pEthHdr->EtherType != pTagData->EthHdr.EtherType)
307	{
308	Log3(("tagged, but the ethernet header has changed\n"));
309	return false;
310	}
311
312	return true;
313	}
314
315
316	/**
317	* Internal worker that create a darwin mbuf for a (scatter/)gather list.
318	*
319	* @returns Pointer to the mbuf.
320	* @param pThis The instance.
321	* @param pSG The (scatter/)gather list.
322	*/
323	static mbuf_t vboxNetFltDarwinMBufFromSG(PVBOXNETFLTINS pThis, PINTNETSG pSG)
324	{
325	/// @todo future? mbuf_how_t How = preemption enabled ? MBUF_DONTWAIT : MBUF_WAITOK;
326	mbuf_how_t How = MBUF_WAITOK;
327
328	/*
329	* We need some way of getting back to our instance data when
330	* the mbuf is freed, so use pvUserData for this.
331	* -- this is not relevant anylonger! --
332	*/
333	Assert(!pSG->pvUserData \|\| pSG->pvUserData == pThis);
334	Assert(!pSG->pvUserData2);
335	pSG->pvUserData = pThis;
336
337	/*
338	* Allocate a packet and copy over the data.
339	*
340	* Using mbuf_attachcluster() here would've been nice but there are two
341	* issues with it: (1) it's 10.5.x only, and (2) the documentation indicates
342	* that it's not supposed to be used for really external buffers. The 2nd
343	* point might be argued against considering that the only m_clattach user
344	* is mallocs memory for the ext mbuf and not doing what's stated in the docs.
345	* However, it's hard to tell if these m_clattach buffers actually makes it
346	* to the NICs or not, and even if they did, the NIC would need the physical
347	* addresses for the pages they contain and might end up copying the data
348	* to a new mbuf anyway.
349	*
350	* So, in the end it's better to just do it the simple way that will work
351	* 100%, even if it involves some extra work (alloc + copy) we really wished
352	* to avoid.
353	*
354	* Note. We can't make use of the physical addresses on darwin because the
355	* way the mbuf / cluster stuff works (see mbuf_data_to_physical and
356	* mcl_to_paddr).
357	*/
358	mbuf_t pPkt = NULL;
359	errno_t err = mbuf_allocpacket(How, pSG->cbTotal, NULL, &pPkt);
360	if (!err)
361	{
362	/* Skip zero sized memory buffers (paranoia). */
363	mbuf_t pCur = pPkt;
364	while (pCur && !mbuf_maxlen(pCur))
365	pCur = mbuf_next(pCur);
366	Assert(pCur);
367
368	/* Set the required packet header attributes. */
369	mbuf_pkthdr_setlen(pPkt, pSG->cbTotal);
370	mbuf_pkthdr_setheader(pPkt, mbuf_data(pCur));
371
372	/* Special case the single buffer copy. */
373	if ( mbuf_next(pCur)
374	&& mbuf_maxlen(pCur) >= pSG->cbTotal)
375	{
376	mbuf_setlen(pCur, pSG->cbTotal);
377	IntNetSgRead(pSG, mbuf_data(pCur));
378	}
379	else
380	{
381	/* Multi buffer copying. */
382	size_t cbLeft = pSG->cbTotal;
383	size_t offSrc = 0;
384	while (cbLeft > 0 && pCur)
385	{
386	size_t cb = mbuf_maxlen(pCur);
387	if (cb > cbLeft)
388	cb = cbLeft;
389	mbuf_setlen(pCur, cb);
390	IntNetSgReadEx(pSG, offSrc, cb, mbuf_data(pCur));
391
392	/* advance */
393	offSrc += cb;
394	cbLeft -= cb;
395	pCur = mbuf_next(pCur);
396	}
397	Assert(cbLeft == 0);
398	}
399	if (!err)
400	{
401	/*
402	* Tag the packet and return successfully.
403	*/
404	PVBOXNETFLTTAG pTagData;
405	err = mbuf_tag_allocate(pPkt, g_idTag, 0 /* type /, sizeof(VBOXNETFLTTAG) / tag len /, How, (void *)&pTagData);
406	if (!err)
407	{
408	Assert(pSG->aSegs[0].cb >= sizeof(pTagData->EthHdr));
409	memcpy(&pTagData->EthHdr, pSG->aSegs[0].pv, sizeof(pTagData->EthHdr));
410	return pPkt;
411	}
412
413	/* bailout: */
414	AssertMsg(err == ENOMEM \|\| err == EWOULDBLOCK, ("err=%d\n", err));
415	}
416
417	mbuf_freem(pPkt);
418	}
419	else
420	AssertMsg(err == ENOMEM \|\| err == EWOULDBLOCK, ("err=%d\n", err));
421	pSG->pvUserData = NULL;
422
423	return NULL;
424	}
425
426
427	/**
428	* Calculates the number of segments required to represent the mbuf.
429	*
430	* @returns Number of segments.
431	* @param pThis The instance.
432	* @param pMBuf The mbuf.
433	* @param pvFrame The frame pointer, optional.
434	*/
435	DECLINLINE(unsigned) vboxNetFltDarwinMBufCalcSGSegs(PVBOXNETFLTINS pThis, mbuf_t pMBuf, void *pvFrame)
436	{
437	NOREF(pThis);
438
439	/*
440	* Count the buffers in the chain.
441	*/
442	unsigned cSegs = 0;
443	for (mbuf_t pCur = pMBuf; pCur; pCur = mbuf_next(pCur))
444	if (mbuf_len(pCur))
445	cSegs++;
446	else if ( !cSegs
447	&& pvFrame
448	&& (uintptr_t)pvFrame - (uintptr_t)mbuf_datastart(pMBuf) < mbuf_maxlen(pMBuf))
449	cSegs++;
450
451	#ifdef PADD_RUNT_FRAMES_FROM_HOST
452	/*
453	* Add one buffer if the total is less than the ethernet minimum 60 bytes.
454	* This may allocate a segment too much if the ethernet header is separated,
455	* but that shouldn't harm us much.
456	*/
457	if (mbuf_pkthdr_len(pMBuf) < 60)
458	cSegs++;
459	#endif
460
461	#ifdef VBOXNETFLT_DARWIN_TEST_SEG_SIZE
462	/* maximize the number of segments. */
463	cSegs = RT_MAX(VBOXNETFLT_DARWIN_MAX_SEGS - 1, cSegs);
464	#endif
465
466	return cSegs ? cSegs : 1;
467	}
468
469
470	/**
471	* Initializes a SG list from an mbuf.
472	*
473	* @returns Number of segments.
474	* @param pThis The instance.
475	* @param pMBuf The mbuf.
476	* @param pSG The SG.
477	* @param pvFrame The frame pointer, optional.
478	* @param cSegs The number of segments allocated for the SG.
479	* This should match the number in the mbuf exactly!
480	* @param fSrc The source of the frame.
481	*/
482	DECLINLINE(void) vboxNetFltDarwinMBufToSG(PVBOXNETFLTINS pThis, mbuf_t pMBuf, void *pvFrame, PINTNETSG pSG, unsigned cSegs, uint32_t fSrc)
483	{
484	NOREF(pThis);
485
486	/*
487	* Walk the chain and convert the buffers to segments. Works INTNETSG::cbTotal.
488	*/
489	unsigned iSeg = 0;
490	IntNetSgInitTempSegs(pSG, 0 /cbTotal/, cSegs, 0 /cSegsUsed/);
491	for (mbuf_t pCur = pMBuf; pCur; pCur = mbuf_next(pCur))
492	{
493	size_t cbSeg = mbuf_len(pCur);
494	if (cbSeg)
495	{
496	void *pvSeg = mbuf_data(pCur);
497
498	/* deal with pvFrame */
499	if (!iSeg && pvFrame && pvFrame != pvSeg)
500	{
501	void *pvStart = mbuf_datastart(pMBuf);
502	uintptr_t offSeg = (uintptr_t)pvSeg - (uintptr_t)pvStart;
503	uintptr_t offSegEnd = offSeg + cbSeg;
504	Assert(pvStart && pvSeg && offSeg < mbuf_maxlen(pMBuf) && offSegEnd <= mbuf_maxlen(pMBuf)); NOREF(offSegEnd);
505	uintptr_t offFrame = (uintptr_t)pvFrame - (uintptr_t)pvStart;
506	if (RT_LIKELY(offFrame < offSeg))
507	{
508	pvSeg = pvFrame;
509	cbSeg += offSeg - offFrame;
510	}
511	else
512	AssertMsgFailed(("pvFrame=%p pvStart=%p pvSeg=%p offSeg=%p cbSeg=%#zx offSegEnd=%p offFrame=%p maxlen=%#zx\n",
513	pvFrame, pvStart, pvSeg, offSeg, cbSeg, offSegEnd, offFrame, mbuf_maxlen(pMBuf)));
514	pvFrame = NULL;
515	}
516
517	AssertBreak(iSeg < cSegs);
518	pSG->cbTotal += cbSeg;
519	pSG->aSegs[iSeg].cb = cbSeg;
520	pSG->aSegs[iSeg].pv = pvSeg;
521	pSG->aSegs[iSeg].Phys = NIL_RTHCPHYS;
522	iSeg++;
523	}
524	/* The pvFrame might be in a now empty buffer. */
525	else if ( !iSeg
526	&& pvFrame
527	&& (uintptr_t)pvFrame - (uintptr_t)mbuf_datastart(pMBuf) < mbuf_maxlen(pMBuf))
528	{
529	cbSeg = (uintptr_t)mbuf_datastart(pMBuf) + mbuf_maxlen(pMBuf) - (uintptr_t)pvFrame;
530	pSG->cbTotal += cbSeg;
531	pSG->aSegs[iSeg].cb = cbSeg;
532	pSG->aSegs[iSeg].pv = pvFrame;
533	pSG->aSegs[iSeg].Phys = NIL_RTHCPHYS;
534	iSeg++;
535	pvFrame = NULL;
536	}
537	}
538
539	Assert(iSeg && iSeg <= cSegs);
540	pSG->cSegsUsed = iSeg;
541
542	#ifdef PADD_RUNT_FRAMES_FROM_HOST
543	/*
544	* Add a trailer if the frame is too small.
545	*
546	* Since we're getting to the packet before it is framed, it has not
547	* yet been padded. The current solution is to add a segment pointing
548	* to a buffer containing all zeros and pray that works for all frames...
549	*/
550	if (pSG->cbTotal < 60 && (fSrc & INTNETTRUNKDIR_HOST))
551	{
552	AssertReturnVoid(iSeg < cSegs);
553
554	static uint8_t const s_abZero[128] = {0};
555	pSG->aSegs[iSeg].Phys = NIL_RTHCPHYS;
556	pSG->aSegs[iSeg].pv = (void *)&s_abZero[0];
557	pSG->aSegs[iSeg].cb = 60 - pSG->cbTotal;
558	pSG->cbTotal = 60;
559	pSG->cSegsUsed++;
560	}
561	#endif
562
563	#ifdef VBOXNETFLT_DARWIN_TEST_SEG_SIZE
564	/*
565	* Redistribute the segments.
566	*/
567	if (pSG->cSegsUsed < pSG->cSegsAlloc)
568	{
569	/* copy the segments to the end. */
570	int iSrc = pSG->cSegsUsed;
571	int iDst = pSG->cSegsAlloc;
572	while (iSrc > 0)
573	{
574	iDst--;
575	iSrc--;
576	pSG->aSegs[iDst] = pSG->aSegs[iSrc];
577	}
578
579	/* create small segments from the start. */
580	pSG->cSegsUsed = pSG->cSegsAlloc;
581	iSrc = iDst;
582	iDst = 0;
583	while ( iDst < iSrc
584	&& iDst < pSG->cSegsAlloc)
585	{
586	pSG->aSegs[iDst].Phys = NIL_RTHCPHYS;
587	pSG->aSegs[iDst].pv = pSG->aSegs[iSrc].pv;
588	pSG->aSegs[iDst].cb = RT_MIN(pSG->aSegs[iSrc].cb, VBOXNETFLT_DARWIN_TEST_SEG_SIZE);
589	if (pSG->aSegs[iDst].cb != pSG->aSegs[iSrc].cb)
590	{
591	pSG->aSegs[iSrc].cb -= pSG->aSegs[iDst].cb;
592	pSG->aSegs[iSrc].pv = (uint8_t *)pSG->aSegs[iSrc].pv + pSG->aSegs[iDst].cb;
593	}
594	else if (++iSrc >= pSG->cSegsAlloc)
595	{
596	pSG->cSegsUsed = iDst + 1;
597	break;
598	}
599	iDst++;
600	}
601	}
602	#endif
603
604	AssertMsg(!pvFrame, ("pvFrame=%p pMBuf=%p iSeg=%d\n", pvFrame, pMBuf, iSeg));
605	}
606
607
608	/**
609	* Helper for determining whether the host wants the interface to be
610	* promiscuous.
611	*/
612	static bool vboxNetFltDarwinIsPromiscuous(PVBOXNETFLTINS pThis)
613	{
614	bool fRc = false;
615	ifnet_t pIfNet = vboxNetFltDarwinRetainIfNet(pThis);
616	if (pIfNet)
617	{
618	/* gather the data */
619	uint16_t fIf = ifnet_flags(pIfNet);
620	unsigned cPromisc = VBOX_GET_PCOUNT(pIfNet);
621	bool fSetPromiscuous = ASMAtomicUoReadBool(&pThis->u.s.fSetPromiscuous);
622	vboxNetFltDarwinReleaseIfNet(pThis, pIfNet);
623
624	/* calc the return. */
625	fRc = (fIf & IFF_PROMISC)
626	&& cPromisc > fSetPromiscuous;
627	}
628	return fRc;
629	}
630
631
632
633	/**
634	*
635	* @see iff_detached_func in the darwin kpi.
636	*/
637	static void vboxNetFltDarwinIffDetached(void *pvThis, ifnet_t pIfNet)
638	{
639	PVBOXNETFLTINS pThis = (PVBOXNETFLTINS)pvThis;
640	uint64_t NanoTS = RTTimeSystemNanoTS();
641	LogFlow(("vboxNetFltDarwinIffDetached: pThis=%p NanoTS=%RU64 (%d)\n",
642	pThis, NanoTS, VALID_PTR(pIfNet) ? VBOX_GET_PCOUNT(pIfNet) : -1));
643
644	Assert(!pThis->fDisconnectedFromHost);
645	Assert(!pThis->fRediscoveryPending);
646
647	/*
648	* If we've put it into promiscuous mode, undo that now. If we don't
649	* the if_pcount will go all wrong when it's replugged.
650	*/
651	if (ASMAtomicXchgBool(&pThis->u.s.fSetPromiscuous, false))
652	ifnet_set_promiscuous(pIfNet, 0);
653
654	/*
655	* We carefully take the spinlock and increase the interface reference
656	* behind it in order to avoid problematic races with the detached callback.
657	*/
658	RTSpinlockAcquire(pThis->hSpinlock);
659
660	pIfNet = ASMAtomicUoReadPtrT(&pThis->u.s.pIfNet, ifnet_t);
661	int cPromisc = VALID_PTR(pIfNet) ? VBOX_GET_PCOUNT(pIfNet) : - 1;
662
663	ASMAtomicUoWriteNullPtr(&pThis->u.s.pIfNet);
664	ASMAtomicUoWriteNullPtr(&pThis->u.s.pIfFilter);
665	ASMAtomicWriteBool(&pThis->u.s.fNeedSetPromiscuous, false);
666	pThis->u.s.fSetPromiscuous = false;
667	ASMAtomicUoWriteU64(&pThis->NanoTSLastRediscovery, NanoTS);
668	ASMAtomicUoWriteBool(&pThis->fRediscoveryPending, false);
669	ASMAtomicWriteBool(&pThis->fDisconnectedFromHost, true);
670
671	RTSpinlockReleaseNoInts(pThis->hSpinlock);
672
673	if (pIfNet)
674	ifnet_release(pIfNet);
675	LogRel(("VBoxNetFlt: was detached from '%s' (%d)\n", pThis->szName, cPromisc));
676	}
677
678
679	/**
680	*
681	* @see iff_ioctl_func in the darwin kpi.
682	*/
683	static errno_t vboxNetFltDarwinIffIoCtl(void pvThis, ifnet_t pIfNet, protocol_family_t eProtocol, u_long uCmd, void pvArg)
684	{
685	PVBOXNETFLTINS pThis = (PVBOXNETFLTINS)pvThis;
686	LogFlow(("vboxNetFltDarwinIffIoCtl: pThis=%p uCmd=%lx\n", pThis, uCmd));
687
688	/*
689	* Update fOtherPromiscuous.
690	*/
691	/** @todo we'll have to find the offset of if_pcount to get this right! */
692	//if (uCmd == SIOCSIFFLAGS)
693	//{
694	//
695	//}
696
697	/*
698	* We didn't handle it, continue processing.
699	*/
700	NOREF(pThis);
701	NOREF(eProtocol);
702	NOREF(uCmd);
703	NOREF(pvArg);
704	return EOPNOTSUPP;
705	}
706
707
708	/**
709	*
710	* @see iff_event_func in the darwin kpi.
711	*/
712	static void vboxNetFltDarwinIffEvent(void pvThis, ifnet_t pIfNet, protocol_family_t eProtocol, const struct kev_msg pEvMsg)
713	{
714	PVBOXNETFLTINS pThis = (PVBOXNETFLTINS)pvThis;
715	LogFlow(("vboxNetFltDarwinIffEvent: pThis=%p\n", pThis));
716
717	NOREF(pThis);
718	NOREF(pIfNet);
719	NOREF(eProtocol);
720	NOREF(pEvMsg);
721
722	/*
723	* Watch out for the interface going online / offline.
724	*/
725	if ( VALID_PTR(pThis)
726	&& VALID_PTR(pEvMsg)
727	&& pEvMsg->vendor_code == KEV_VENDOR_APPLE
728	&& pEvMsg->kev_class == KEV_NETWORK_CLASS
729	&& pEvMsg->kev_subclass == KEV_DL_SUBCLASS)
730	{
731	if (pThis->u.s.pIfNet == pIfNet)
732	{
733	if (pEvMsg->event_code == KEV_DL_LINK_ON)
734	{
735	if (ASMAtomicUoReadBool(&pThis->u.s.fNeedSetPromiscuous))
736	{
737	/* failed to bring it online. */
738	errno_t err = ifnet_set_promiscuous(pIfNet, 1);
739	if (!err)
740	{
741	ASMAtomicWriteBool(&pThis->u.s.fSetPromiscuous, true);
742	ASMAtomicWriteBool(&pThis->u.s.fNeedSetPromiscuous, false);
743	Log(("vboxNetFltDarwinIffEvent: enabled promiscuous mode on %s (%d)\n", pThis->szName, VBOX_GET_PCOUNT(pIfNet)));
744	}
745	else
746	Log(("vboxNetFltDarwinIffEvent: ifnet_set_promiscuous failed on %s, err=%d (%d)\n", pThis->szName, err, VBOX_GET_PCOUNT(pIfNet)));
747	}
748	else if ( ASMAtomicUoReadBool(&pThis->u.s.fSetPromiscuous)
749	&& !(ifnet_flags(pIfNet) & IFF_PROMISC))
750	{
751	/* Try fix the inconsistency. */
752	errno_t err = ifnet_set_flags(pIfNet, IFF_PROMISC, IFF_PROMISC);
753	if (!err)
754	err = ifnet_ioctl(pIfNet, 0, SIOCSIFFLAGS, NULL);
755	if (!err && (ifnet_flags(pIfNet) & IFF_PROMISC))
756	Log(("vboxNetFltDarwinIffEvent: fixed IFF_PROMISC on %s (%d)\n", pThis->szName, VBOX_GET_PCOUNT(pIfNet)));
757	else
758	Log(("vboxNetFltDarwinIffEvent: failed to fix IFF_PROMISC on %s, err=%d flags=%#x (%d)\n",
759	pThis->szName, err, ifnet_flags(pIfNet), VBOX_GET_PCOUNT(pIfNet)));
760	}
761	else
762	Log(("vboxNetFltDarwinIffEvent: online, '%s'. flags=%#x (%d)\n", pThis->szName, ifnet_flags(pIfNet), VBOX_GET_PCOUNT(pIfNet)));
763	}
764	else if (pEvMsg->event_code == KEV_DL_LINK_OFF)
765	Log(("vboxNetFltDarwinIffEvent: %s goes down (%d)\n", pThis->szName, VBOX_GET_PCOUNT(pIfNet)));
766	/** @todo KEV_DL_LINK_ADDRESS_CHANGED -> pfnReportMacAddress */
767	/** @todo KEV_DL_SIFFLAGS -> pfnReportPromiscuousMode */
768	}
769	else
770	Log(("vboxNetFltDarwinIffEvent: pThis->u.s.pIfNet=%p pIfNet=%p (%d)\n", pThis->u.s.pIfNet, pIfNet, VALID_PTR(pIfNet) ? VBOX_GET_PCOUNT(pIfNet) : -1));
771	}
772	else if (VALID_PTR(pEvMsg))
773	Log(("vboxNetFltDarwinIffEvent: vendor_code=%#x kev_class=%#x kev_subclass=%#x event_code=%#x\n",
774	pEvMsg->vendor_code, pEvMsg->kev_class, pEvMsg->kev_subclass, pEvMsg->event_code));
775	}
776
777
778	/**
779	* Internal worker for vboxNetFltDarwinIffInput and vboxNetFltDarwinIffOutput,
780	*
781	* @returns 0 or EJUSTRETURN.
782	* @param pThis The instance.
783	* @param pMBuf The mbuf.
784	* @param pvFrame The start of the frame, optional.
785	* @param fSrc Where the packet (allegedly) comes from, one INTNETTRUNKDIR_* value.
786	* @param eProtocol The protocol.
787	*/
788	static errno_t vboxNetFltDarwinIffInputOutputWorker(PVBOXNETFLTINS pThis, mbuf_t pMBuf, void *pvFrame,
789	uint32_t fSrc, protocol_family_t eProtocol)
790	{
791	/*
792	* Drop it immediately?
793	*/
794	Log2(("vboxNetFltDarwinIffInputOutputWorker: pThis=%p pMBuf=%p pvFrame=%p fSrc=%#x cbPkt=%x\n",
795	pThis, pMBuf, pvFrame, fSrc, pMBuf ? mbuf_pkthdr_len(pMBuf) : -1));
796	if (!pMBuf)
797	return 0;
798	#if 0 /* debugging lost icmp packets */
799	if (mbuf_pkthdr_len(pMBuf) > 0x300)
800	{
801	uint8_t pb = (uint8_t )(pvFrame ? pvFrame : mbuf_data(pMBuf));
802	Log3(("D=%.6Rhxs S=%.6Rhxs T=%04x IFF\n", pb, pb + 6, RT_BE2H_U16((uint16_t )(pb + 12))));
803	}
804	#endif
805	if (vboxNetFltDarwinMBufIsOur(pThis, pMBuf, pvFrame))
806	return 0;
807
808	/*
809	* Active? Retain the instance and increment the busy counter.
810	*/
811	if (!vboxNetFltTryRetainBusyActive(pThis))
812	return 0;
813
814	/*
815	* Finalize out-bound packets since the stack puts off finalizing
816	* TCP/IP checksums as long as possible.
817	* ASSUMES this only applies to outbound IP packets.
818	*/
819	if ( (fSrc & INTNETTRUNKDIR_HOST)
820	&& eProtocol == PF_INET)
821	{
822	Assert(!pvFrame);
823	mbuf_outbound_finalize(pMBuf, eProtocol, sizeof(RTNETETHERHDR));
824	}
825
826	/*
827	* Create a (scatter/)gather list for the mbuf and feed it to the internal network.
828	*/
829	bool fDropIt = false;
830	unsigned cSegs = vboxNetFltDarwinMBufCalcSGSegs(pThis, pMBuf, pvFrame);
831	if (cSegs < VBOXNETFLT_DARWIN_MAX_SEGS)
832	{
833	PINTNETSG pSG = (PINTNETSG)alloca(RT_OFFSETOF(INTNETSG, aSegs[cSegs]));
834	vboxNetFltDarwinMBufToSG(pThis, pMBuf, pvFrame, pSG, cSegs, fSrc);
835
836	fDropIt = pThis->pSwitchPort->pfnRecv(pThis->pSwitchPort, NULL /* pvIf */, pSG, fSrc);
837	if (fDropIt)
838	{
839	/*
840	* Check if this interface is in promiscuous mode. We should not drop
841	* any packets before they get to the driver as it passes them to tap
842	* callbacks in order for BPF to work properly.
843	*/
844	if (vboxNetFltDarwinIsPromiscuous(pThis))
845	fDropIt = false;
846	else
847	mbuf_freem(pMBuf);
848	}
849	}
850
851	vboxNetFltRelease(pThis, true /* fBusy */);
852
853	return fDropIt ? EJUSTRETURN : 0;
854	}
855
856
857	/**
858	* From the host.
859	*
860	* @see iff_output_func in the darwin kpi.
861	*/
862	static errno_t vboxNetFltDarwinIffOutput(void pvThis, ifnet_t pIfNet, protocol_family_t eProtocol, mbuf_t ppMBuf)
863	{
864	/** @todo there was some note about the ethernet header here or something like that... */
865
866	NOREF(eProtocol);
867	NOREF(pIfNet);
868	return vboxNetFltDarwinIffInputOutputWorker((PVBOXNETFLTINS)pvThis, *ppMBuf, NULL, INTNETTRUNKDIR_HOST, eProtocol);
869	}
870
871
872	/**
873	* From the wire.
874	*
875	* @see iff_input_func in the darwin kpi.
876	*/
877	static errno_t vboxNetFltDarwinIffInput(void pvThis, ifnet_t pIfNet, protocol_family_t eProtocol, mbuf_t ppMBuf, char **ppchFrame)
878	{
879	NOREF(eProtocol);
880	NOREF(pIfNet);
881	return vboxNetFltDarwinIffInputOutputWorker((PVBOXNETFLTINS)pvThis, ppMBuf, ppchFrame, INTNETTRUNKDIR_WIRE, eProtocol);
882	}
883
884
885	/**
886	* Internal worker for vboxNetFltOsInitInstance and vboxNetFltOsMaybeRediscovered.
887	*
888	* @returns VBox status code.
889	* @param pThis The instance.
890	* @param fRediscovery If set we're doing a rediscovery attempt, so, don't
891	* flood the release log.
892	*/
893	static int vboxNetFltDarwinAttachToInterface(PVBOXNETFLTINS pThis, bool fRediscovery)
894	{
895	LogFlow(("vboxNetFltDarwinAttachToInterface: pThis=%p (%s)\n", pThis, pThis->szName));
896
897	/*
898	* Locate the interface first.
899	*
900	* The pIfNet member is updated before iflt_attach is called and used
901	* to deal with the hypothetical case where someone rips out the
902	* interface immediately after our iflt_attach call.
903	*/
904	ifnet_t pIfNet = NULL;
905	errno_t err = ifnet_find_by_name(pThis->szName, &pIfNet);
906	if (err)
907	{
908	Assert(err == ENXIO);
909	if (!fRediscovery)
910	LogRel(("VBoxFltDrv: failed to find ifnet '%s' (err=%d)\n", pThis->szName, err));
911	else
912	Log(("VBoxFltDrv: failed to find ifnet '%s' (err=%d)\n", pThis->szName, err));
913	return VERR_INTNET_FLT_IF_NOT_FOUND;
914	}
915
916	RTSpinlockAcquire(pThis->hSpinlock);
917	ASMAtomicUoWritePtr(&pThis->u.s.pIfNet, pIfNet);
918	RTSpinlockReleaseNoInts(pThis->hSpinlock);
919
920	/*
921	* Get the mac address while we still have a valid ifnet reference.
922	*/
923	err = ifnet_lladdr_copy_bytes(pIfNet, &pThis->u.s.MacAddr, sizeof(pThis->u.s.MacAddr));
924	if (!err)
925	{
926	/*
927	* Try attach the filter.
928	*/
929	struct iff_filter RegRec;
930	RegRec.iff_cookie = pThis;
931	RegRec.iff_name = "VBoxNetFlt";
932	RegRec.iff_protocol = 0;
933	RegRec.iff_input = vboxNetFltDarwinIffInput;
934	RegRec.iff_output = vboxNetFltDarwinIffOutput;
935	RegRec.iff_event = vboxNetFltDarwinIffEvent;
936	RegRec.iff_ioctl = vboxNetFltDarwinIffIoCtl;
937	RegRec.iff_detached = vboxNetFltDarwinIffDetached;
938	interface_filter_t pIfFilter = NULL;
939	err = iflt_attach(pIfNet, &RegRec, &pIfFilter);
940	Assert(err \|\| pIfFilter);
941
942	RTSpinlockAcquire(pThis->hSpinlock);
943	pIfNet = ASMAtomicUoReadPtrT(&pThis->u.s.pIfNet, ifnet_t);
944	if (pIfNet && !err)
945	{
946	ASMAtomicUoWriteBool(&pThis->fDisconnectedFromHost, false);
947	ASMAtomicUoWritePtr(&pThis->u.s.pIfFilter, pIfFilter);
948	pIfNet = NULL; /* don't dereference it */
949	}
950	RTSpinlockReleaseNoInts(pThis->hSpinlock);
951
952	/* Report capabilities. */
953	if ( !pIfNet
954	&& vboxNetFltTryRetainBusyNotDisconnected(pThis))
955	{
956	Assert(pThis->pSwitchPort);
957	pThis->pSwitchPort->pfnReportMacAddress(pThis->pSwitchPort, &pThis->u.s.MacAddr);
958	pThis->pSwitchPort->pfnReportPromiscuousMode(pThis->pSwitchPort, vboxNetFltDarwinIsPromiscuous(pThis));
959	pThis->pSwitchPort->pfnReportGsoCapabilities(pThis->pSwitchPort, 0, INTNETTRUNKDIR_WIRE \| INTNETTRUNKDIR_HOST);
960	pThis->pSwitchPort->pfnReportNoPreemptDsts(pThis->pSwitchPort, 0 /* none */);
961	vboxNetFltRelease(pThis, true /fBusy/);
962	}
963	}
964
965	/* Release the interface on failure. */
966	if (pIfNet)
967	ifnet_release(pIfNet);
968
969	int rc = RTErrConvertFromErrno(err);
970	if (RT_SUCCESS(rc))
971	LogRel(("VBoxFltDrv: attached to '%s' / %.*Rhxs\n", pThis->szName, sizeof(pThis->u.s.MacAddr), &pThis->u.s.MacAddr));
972	else
973	LogRel(("VBoxFltDrv: failed to attach to ifnet '%s' (err=%d)\n", pThis->szName, err));
974	return rc;
975	}
976
977
978	bool vboxNetFltOsMaybeRediscovered(PVBOXNETFLTINS pThis)
979	{
980	vboxNetFltDarwinAttachToInterface(pThis, true /* fRediscovery */);
981	return !ASMAtomicUoReadBool(&pThis->fDisconnectedFromHost);
982	}
983
984
985	int vboxNetFltPortOsXmit(PVBOXNETFLTINS pThis, void *pvIfData, PINTNETSG pSG, uint32_t fDst)
986	{
987	NOREF(pvIfData);
988
989	int rc = VINF_SUCCESS;
990	ifnet_t pIfNet = vboxNetFltDarwinRetainIfNet(pThis);
991	if (pIfNet)
992	{
993	/*
994	* Create a mbuf for the gather list and push it onto the wire.
995	*
996	* Note! If the interface is in the promiscuous mode we need to send the
997	* packet down the stack so it reaches the driver and Berkeley
998	* Packet Filter (see @bugref{5817}).
999	*/
1000	if ((fDst & INTNETTRUNKDIR_WIRE) \|\| vboxNetFltDarwinIsPromiscuous(pThis))
1001	{
1002	mbuf_t pMBuf = vboxNetFltDarwinMBufFromSG(pThis, pSG);
1003	if (pMBuf)
1004	{
1005	errno_t err = ifnet_output_raw(pIfNet, PF_LINK, pMBuf);
1006	if (err)
1007	rc = RTErrConvertFromErrno(err);
1008	}
1009	else
1010	rc = VERR_NO_MEMORY;
1011	}
1012
1013	/*
1014	* Create a mbuf for the gather list and push it onto the host stack.
1015	*/
1016	if (fDst & INTNETTRUNKDIR_HOST)
1017	{
1018	mbuf_t pMBuf = vboxNetFltDarwinMBufFromSG(pThis, pSG);
1019	if (pMBuf)
1020	{
1021	/* This is what IONetworkInterface::inputPacket does. */
1022	unsigned const cbEthHdr = 14;
1023	mbuf_pkthdr_setheader(pMBuf, mbuf_data(pMBuf));
1024	mbuf_pkthdr_setlen(pMBuf, mbuf_pkthdr_len(pMBuf) - cbEthHdr);
1025	mbuf_setdata(pMBuf, (uint8_t *)mbuf_data(pMBuf) + cbEthHdr, mbuf_len(pMBuf) - cbEthHdr);
1026	mbuf_pkthdr_setrcvif(pMBuf, pIfNet); /* will crash without this. */
1027
1028	errno_t err = ifnet_input(pIfNet, pMBuf, NULL);
1029	if (err)
1030	rc = RTErrConvertFromErrno(err);
1031	}
1032	else
1033	rc = VERR_NO_MEMORY;
1034	}
1035
1036	vboxNetFltDarwinReleaseIfNet(pThis, pIfNet);
1037	}
1038
1039	return rc;
1040	}
1041
1042
1043	void vboxNetFltPortOsSetActive(PVBOXNETFLTINS pThis, bool fActive)
1044	{
1045	ifnet_t pIfNet = vboxNetFltDarwinRetainIfNet(pThis);
1046	if (pIfNet)
1047	{
1048	if (pThis->fDisablePromiscuous)
1049	{
1050	/*
1051	* Promiscuous mode should not be used (wireless), we just need to
1052	* make sure the interface is up.
1053	*/
1054	if (fActive)
1055	{
1056	u_int16_t fIf = ifnet_flags(pIfNet);
1057	if ((fIf & (IFF_UP \| IFF_RUNNING)) != (IFF_UP \| IFF_RUNNING))
1058	{
1059	ifnet_set_flags(pIfNet, IFF_UP, IFF_UP);
1060	ifnet_ioctl(pIfNet, 0, SIOCSIFFLAGS, NULL);
1061	}
1062	}
1063	}
1064	else
1065	{
1066	/*
1067	* This api is a bit weird, the best reference is the code.
1068	*
1069	* Also, we have a bit or race conditions wrt the maintenance of
1070	* host the interface promiscuity for vboxNetFltPortOsIsPromiscuous.
1071	*/
1072	unsigned const cPromiscBefore = VBOX_GET_PCOUNT(pIfNet);
1073	u_int16_t fIf;
1074	if (fActive)
1075	{
1076	Assert(!pThis->u.s.fSetPromiscuous);
1077	errno_t err = ENETDOWN;
1078	ASMAtomicWriteBool(&pThis->u.s.fNeedSetPromiscuous, true);
1079
1080	/*
1081	* Try bring the interface up and running if it's down.
1082	*/
1083	fIf = ifnet_flags(pIfNet);
1084	if ((fIf & (IFF_UP \| IFF_RUNNING)) != (IFF_UP \| IFF_RUNNING))
1085	{
1086	err = ifnet_set_flags(pIfNet, IFF_UP, IFF_UP);
1087	errno_t err2 = ifnet_ioctl(pIfNet, 0, SIOCSIFFLAGS, NULL);
1088	if (!err)
1089	err = err2;
1090	fIf = ifnet_flags(pIfNet);
1091	}
1092
1093	/*
1094	* Is it already up? If it isn't, leave it to the link event or
1095	* we'll upset if_pcount (as stated above, ifnet_set_promiscuous is weird).
1096	*/
1097	if ((fIf & (IFF_UP \| IFF_RUNNING)) == (IFF_UP \| IFF_RUNNING))
1098	{
1099	err = ifnet_set_promiscuous(pIfNet, 1);
1100	pThis->u.s.fSetPromiscuous = err == 0;
1101	if (!err)
1102	{
1103	ASMAtomicWriteBool(&pThis->u.s.fNeedSetPromiscuous, false);
1104
1105	/* check if it actually worked, this stuff is not always behaving well. */
1106	if (!(ifnet_flags(pIfNet) & IFF_PROMISC))
1107	{
1108	err = ifnet_set_flags(pIfNet, IFF_PROMISC, IFF_PROMISC);
1109	if (!err)
1110	err = ifnet_ioctl(pIfNet, 0, SIOCSIFFLAGS, NULL);
1111	if (!err)
1112	Log(("vboxNetFlt: fixed IFF_PROMISC on %s (%d->%d)\n", pThis->szName, cPromiscBefore, VBOX_GET_PCOUNT(pIfNet)));
1113	else
1114	Log(("VBoxNetFlt: failed to fix IFF_PROMISC on %s, err=%d (%d->%d)\n",
1115	pThis->szName, err, cPromiscBefore, VBOX_GET_PCOUNT(pIfNet)));
1116	}
1117	}
1118	else
1119	Log(("VBoxNetFlt: ifnet_set_promiscuous -> err=%d grr! (%d->%d)\n", err, cPromiscBefore, VBOX_GET_PCOUNT(pIfNet)));
1120	}
1121	else if (!err)
1122	Log(("VBoxNetFlt: Waiting for the link to come up... (%d->%d)\n", cPromiscBefore, VBOX_GET_PCOUNT(pIfNet)));
1123	if (err)
1124	LogRel(("VBoxNetFlt: Failed to put '%s' into promiscuous mode, err=%d (%d->%d)\n", pThis->szName, err, cPromiscBefore, VBOX_GET_PCOUNT(pIfNet)));
1125	}
1126	else
1127	{
1128	ASMAtomicWriteBool(&pThis->u.s.fNeedSetPromiscuous, false);
1129	if (pThis->u.s.fSetPromiscuous)
1130	{
1131	errno_t err = ifnet_set_promiscuous(pIfNet, 0);
1132	AssertMsg(!err, ("%d\n", err)); NOREF(err);
1133	}
1134	pThis->u.s.fSetPromiscuous = false;
1135
1136	fIf = ifnet_flags(pIfNet);
1137	Log(("VBoxNetFlt: fIf=%#x; %d->%d\n", fIf, cPromiscBefore, VBOX_GET_PCOUNT(pIfNet)));
1138	}
1139	}
1140
1141	vboxNetFltDarwinReleaseIfNet(pThis, pIfNet);
1142	}
1143	}
1144
1145
1146	int vboxNetFltOsDisconnectIt(PVBOXNETFLTINS pThis)
1147	{
1148	/* Nothing to do here. */
1149	return VINF_SUCCESS;
1150	}
1151
1152
1153	int vboxNetFltOsConnectIt(PVBOXNETFLTINS pThis)
1154	{
1155	/* Nothing to do here. */
1156	return VINF_SUCCESS;
1157	}
1158
1159
1160	void vboxNetFltOsDeleteInstance(PVBOXNETFLTINS pThis)
1161	{
1162	interface_filter_t pIfFilter;
1163
1164	/*
1165	* Carefully obtain the interface filter reference and detach it.
1166	*/
1167	RTSpinlockAcquire(pThis->hSpinlock);
1168	pIfFilter = ASMAtomicUoReadPtrT(&pThis->u.s.pIfFilter, interface_filter_t);
1169	if (pIfFilter)
1170	ASMAtomicUoWriteNullPtr(&pThis->u.s.pIfFilter);
1171	RTSpinlockReleaseNoInts(pThis->hSpinlock);
1172
1173	if (pIfFilter)
1174	iflt_detach(pIfFilter);
1175	}
1176
1177
1178	int vboxNetFltOsInitInstance(PVBOXNETFLTINS pThis, void *pvContext)
1179	{
1180	NOREF(pvContext);
1181	return vboxNetFltDarwinAttachToInterface(pThis, false /* fRediscovery */);
1182	}
1183
1184
1185	int vboxNetFltOsPreInitInstance(PVBOXNETFLTINS pThis)
1186	{
1187	/*
1188	* Init the darwin specific members.
1189	*/
1190	pThis->u.s.pIfNet = NULL;
1191	pThis->u.s.pIfFilter = NULL;
1192	pThis->u.s.fSetPromiscuous = false;
1193	pThis->u.s.fNeedSetPromiscuous = false;
1194	//pThis->u.s.MacAddr = {0};
1195
1196	return VINF_SUCCESS;
1197	}
1198
1199
1200	void vboxNetFltPortOsNotifyMacAddress(PVBOXNETFLTINS pThis, void *pvIfData, PCRTMAC pMac)
1201	{
1202	NOREF(pThis); NOREF(pvIfData); NOREF(pMac);
1203	}
1204
1205
1206	int vboxNetFltPortOsConnectInterface(PVBOXNETFLTINS pThis, void pvIf, void *ppvIfData)
1207	{
1208	/* Nothing to do */
1209	NOREF(pThis); NOREF(pvIf); NOREF(ppvIfData);
1210	return VINF_SUCCESS;
1211	}
1212
1213
1214	int vboxNetFltPortOsDisconnectInterface(PVBOXNETFLTINS pThis, void *pvIfData)
1215	{
1216	/* Nothing to do */
1217	NOREF(pThis); NOREF(pvIfData);
1218	return VINF_SUCCESS;
1219	}
1220

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source: vbox/trunk/src/VBox/HostDrivers/VBoxNetFlt/darwin/VBoxNetFlt-darwin.cpp@ 48952

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