VBoxNetFlt-darwin.cpp@ 32740

Last change on this file since 32740 was 32740, checked in by vboxsync, 14 years ago
vboxNetFltDarwinMBufFromSG: Removed obsolete assertion (triggers when intnetR0TrunkIfSendGsoFallback sends stuff).
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File size: 41.0 KB

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1	/* $Id: VBoxNetFlt-darwin.cpp 32740 2010-09-23 21:45:16Z vboxsync $ */
2	/** @file
3	* VBoxNetFlt - Network Filter Driver (Host), Darwin Specific Code.
4	*/
5
6	/*
7	* Copyright (C) 2006-2008 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 sufficent to identify our mbufs. For the icmp scenario the ethernet
98	* header naturarlly 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 untill 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	RTSPINLOCKTMP Tmp = RTSPINLOCKTMP_INITIALIZER;
230	ifnet_t pIfNet = NULL;
231
232	/*
233	* Be careful here to avoid problems racing the detached callback.
234	*/
235	RTSpinlockAcquireNoInts(pThis->hSpinlock, &Tmp);
236	if (!ASMAtomicUoReadBool(&pThis->fDisconnectedFromHost))
237	{
238	pIfNet = ASMAtomicUoReadPtrT(&pThis->u.s.pIfNet, ifnet_t);
239	if (pIfNet)
240	ifnet_reference(pIfNet);
241	}
242	RTSpinlockReleaseNoInts(pThis->hSpinlock, &Tmp);
243
244	return pIfNet;
245	}
246
247
248	/**
249	* Release the host interface handle previously retained
250	* by vboxNetFltDarwinRetainIfNet.
251	*
252	* @param pThis The instance.
253	* @param pIfNet The vboxNetFltDarwinRetainIfNet return value, NULL is fine.
254	*/
255	DECLINLINE(void) vboxNetFltDarwinReleaseIfNet(PVBOXNETFLTINS pThis, ifnet_t pIfNet)
256	{
257	NOREF(pThis);
258	if (pIfNet)
259	ifnet_release(pIfNet);
260	}
261
262
263	/**
264	* Checks whether this is an mbuf created by vboxNetFltDarwinMBufFromSG,
265	* i.e. a buffer which we're pushing and should be ignored by the filter callbacks.
266	*
267	* @returns true / false accordingly.
268	* @param pThis The instance.
269	* @param pMBuf The mbuf.
270	* @param pvFrame The frame pointer, optional.
271	*/
272	DECLINLINE(bool) vboxNetFltDarwinMBufIsOur(PVBOXNETFLTINS pThis, mbuf_t pMBuf, void *pvFrame)
273	{
274	NOREF(pThis);
275
276	/*
277	* Lookup the tag set by vboxNetFltDarwinMBufFromSG.
278	*/
279	PCVBOXNETFLTTAG pTagData;
280	size_t cbTagData;
281	errno_t err = mbuf_tag_find(pMBuf, g_idTag, 0 /* type /, &cbTagData, (void *)&pTagData);
282	if (err)
283	return false;
284	AssertReturn(cbTagData == sizeof(*pTagData), false);
285
286	/*
287	* Dig out the ethernet header from the mbuf.
288	*/
289	PCRTNETETHERHDR pEthHdr = (PCRTNETETHERHDR)pvFrame;
290	if (!pEthHdr)
291	pEthHdr = (PCRTNETETHERHDR)mbuf_pkthdr_header(pMBuf);
292	if (!pEthHdr)
293	pEthHdr = (PCRTNETETHERHDR)mbuf_data(pMBuf);
294	/* ASSUMING that there is enough data to work on! */
295	if ( pEthHdr->DstMac.au8[0] != pTagData->EthHdr.DstMac.au8[0]
296	\|\| pEthHdr->DstMac.au8[1] != pTagData->EthHdr.DstMac.au8[1]
297	\|\| pEthHdr->DstMac.au8[2] != pTagData->EthHdr.DstMac.au8[2]
298	\|\| pEthHdr->DstMac.au8[3] != pTagData->EthHdr.DstMac.au8[3]
299	\|\| pEthHdr->DstMac.au8[4] != pTagData->EthHdr.DstMac.au8[4]
300	\|\| pEthHdr->DstMac.au8[5] != pTagData->EthHdr.DstMac.au8[5]
301	\|\| pEthHdr->SrcMac.au8[0] != pTagData->EthHdr.SrcMac.au8[0]
302	\|\| pEthHdr->SrcMac.au8[1] != pTagData->EthHdr.SrcMac.au8[1]
303	\|\| pEthHdr->SrcMac.au8[2] != pTagData->EthHdr.SrcMac.au8[2]
304	\|\| pEthHdr->SrcMac.au8[3] != pTagData->EthHdr.SrcMac.au8[3]
305	\|\| pEthHdr->SrcMac.au8[4] != pTagData->EthHdr.SrcMac.au8[4]
306	\|\| pEthHdr->SrcMac.au8[5] != pTagData->EthHdr.SrcMac.au8[5]
307	\|\| pEthHdr->EtherType != pTagData->EthHdr.EtherType)
308	{
309	Log3(("tagged, but the ethernet header has changed\n"));
310	return false;
311	}
312
313	return true;
314	}
315
316
317	/**
318	* Internal worker that create a darwin mbuf for a (scatter/)gather list.
319	*
320	* @returns Pointer to the mbuf.
321	* @param pThis The instance.
322	* @param pSG The (scatter/)gather list.
323	*/
324	static mbuf_t vboxNetFltDarwinMBufFromSG(PVBOXNETFLTINS pThis, PINTNETSG pSG)
325	{
326	/// @todo future? mbuf_how_t How = preemtion enabled ? MBUF_DONTWAIT : MBUF_WAITOK;
327	mbuf_how_t How = MBUF_WAITOK;
328
329	/*
330	* We need some way of getting back to our instance data when
331	* the mbuf is freed, so use pvUserData for this.
332	* -- this is not relevant anylonger! --
333	*/
334	Assert(!pSG->pvUserData \|\| pSG->pvUserData == pThis);
335	Assert(!pSG->pvUserData2);
336	pSG->pvUserData = pThis;
337
338	/*
339	* Allocate a packet and copy over the data.
340	*
341	* Using mbuf_attachcluster() here would've been nice but there are two
342	* issues with it: (1) it's 10.5.x only, and (2) the documentation indicates
343	* that it's not supposed to be used for really external buffers. The 2nd
344	* point might be argued against considering that the only m_clattach user
345	* is mallocs memory for the ext mbuf and not doing what's stated in the docs.
346	* However, it's hard to tell if these m_clattach buffers actually makes it
347	* to the NICs or not, and even if they did, the NIC would need the physical
348	* addresses for the pages they contain and might end up copying the data
349	* to a new mbuf anyway.
350	*
351	* So, in the end it's better to just do it the simple way that will work
352	* 100%, even if it involes some extra work (alloc + copy) we really wished
353	* to avoid.
354	*
355	* Note. We can't make use of the physical addresses on darwin because the
356	* way the mbuf / cluster stuffe works (see mbuf_data_to_physical and
357	* mcl_to_paddr).
358	*/
359	mbuf_t pPkt = NULL;
360	errno_t err = mbuf_allocpacket(How, pSG->cbTotal, NULL, &pPkt);
361	if (!err)
362	{
363	/* Skip zero sized memory buffers (paranoia). */
364	mbuf_t pCur = pPkt;
365	while (pCur && !mbuf_maxlen(pCur))
366	pCur = mbuf_next(pCur);
367	Assert(pCur);
368
369	/* Set the required packet header attributes. */
370	mbuf_pkthdr_setlen(pPkt, pSG->cbTotal);
371	mbuf_pkthdr_setheader(pPkt, mbuf_data(pCur));
372
373	/* Special case the single buffer copy. */
374	if ( mbuf_next(pCur)
375	&& mbuf_maxlen(pCur) >= pSG->cbTotal)
376	{
377	mbuf_setlen(pCur, pSG->cbTotal);
378	IntNetSgRead(pSG, mbuf_data(pCur));
379	}
380	else
381	{
382	/* Multi buffer copying. */
383	size_t cbLeft = pSG->cbTotal;
384	size_t offSrc = 0;
385	while (cbLeft > 0 && pCur)
386	{
387	size_t cb = mbuf_maxlen(pCur);
388	if (cb > cbLeft)
389	cb = cbLeft;
390	mbuf_setlen(pCur, cb);
391	IntNetSgReadEx(pSG, offSrc, cb, mbuf_data(pCur));
392
393	/* advance */
394	offSrc += cb;
395	cbLeft -= cb;
396	pCur = mbuf_next(pCur);
397	}
398	Assert(cbLeft == 0);
399	}
400	if (!err)
401	{
402	/*
403	* Tag the packet and return successfully.
404	*/
405	PVBOXNETFLTTAG pTagData;
406	err = mbuf_tag_allocate(pPkt, g_idTag, 0 /* type /, sizeof(VBOXNETFLTTAG) / tag len /, How, (void *)&pTagData);
407	if (!err)
408	{
409	Assert(pSG->aSegs[0].cb >= sizeof(pTagData->EthHdr));
410	memcpy(&pTagData->EthHdr, pSG->aSegs[0].pv, sizeof(pTagData->EthHdr));
411	return pPkt;
412	}
413
414	/* bailout: */
415	AssertMsg(err == ENOMEM \|\| err == EWOULDBLOCK, ("err=%d\n", err));
416	}
417
418	mbuf_freem(pPkt);
419	}
420	else
421	AssertMsg(err == ENOMEM \|\| err == EWOULDBLOCK, ("err=%d\n", err));
422	pSG->pvUserData = NULL;
423
424	return NULL;
425	}
426
427
428	/**
429	* Calculates the number of segments required to represent the mbuf.
430	*
431	* @returns Number of segments.
432	* @param pThis The instance.
433	* @param pMBuf The mbuf.
434	* @param pvFrame The frame pointer, optional.
435	*/
436	DECLINLINE(unsigned) vboxNetFltDarwinMBufCalcSGSegs(PVBOXNETFLTINS pThis, mbuf_t pMBuf, void *pvFrame)
437	{
438	NOREF(pThis);
439
440	/*
441	* Count the buffers in the chain.
442	*/
443	unsigned cSegs = 0;
444	for (mbuf_t pCur = pMBuf; pCur; pCur = mbuf_next(pCur))
445	if (mbuf_len(pCur))
446	cSegs++;
447	else if ( !cSegs
448	&& pvFrame
449	&& (uintptr_t)pvFrame - (uintptr_t)mbuf_datastart(pMBuf) < mbuf_maxlen(pMBuf))
450	cSegs++;
451
452	#ifdef PADD_RUNT_FRAMES_FROM_HOST
453	/*
454	* Add one buffer if the total is less than the ethernet minimum 60 bytes.
455	* This may allocate a segment too much if the ethernet header is separated,
456	* but that shouldn't harm us much.
457	*/
458	if (mbuf_pkthdr_len(pMBuf) < 60)
459	cSegs++;
460	#endif
461
462	#ifdef VBOXNETFLT_DARWIN_TEST_SEG_SIZE
463	/* maximize the number of segments. */
464	cSegs = RT_MAX(VBOXNETFLT_DARWIN_MAX_SEGS - 1, cSegs);
465	#endif
466
467	return cSegs ? cSegs : 1;
468	}
469
470
471	/**
472	* Initializes a SG list from an mbuf.
473	*
474	* @returns Number of segments.
475	* @param pThis The instance.
476	* @param pMBuf The mbuf.
477	* @param pSG The SG.
478	* @param pvFrame The frame pointer, optional.
479	* @param cSegs The number of segments allocated for the SG.
480	* This should match the number in the mbuf exactly!
481	* @param fSrc The source of the frame.
482	*/
483	DECLINLINE(void) vboxNetFltDarwinMBufToSG(PVBOXNETFLTINS pThis, mbuf_t pMBuf, void *pvFrame, PINTNETSG pSG, unsigned cSegs, uint32_t fSrc)
484	{
485	NOREF(pThis);
486
487	/*
488	* Walk the chain and convert the buffers to segments. Works INTNETSG::cbTotal.
489	*/
490	unsigned iSeg = 0;
491	IntNetSgInitTempSegs(pSG, 0 /cbTotal/, cSegs, 0 /cSegsUsed/);
492	for (mbuf_t pCur = pMBuf; pCur; pCur = mbuf_next(pCur))
493	{
494	size_t cbSeg = mbuf_len(pCur);
495	if (cbSeg)
496	{
497	void *pvSeg = mbuf_data(pCur);
498
499	/* deal with pvFrame */
500	if (!iSeg && pvFrame && pvFrame != pvSeg)
501	{
502	void *pvStart = mbuf_datastart(pMBuf);
503	uintptr_t offSeg = (uintptr_t)pvSeg - (uintptr_t)pvStart;
504	uintptr_t offSegEnd = offSeg + cbSeg;
505	Assert(pvStart && pvSeg && offSeg < mbuf_maxlen(pMBuf) && offSegEnd <= mbuf_maxlen(pMBuf)); NOREF(offSegEnd);
506	uintptr_t offFrame = (uintptr_t)pvFrame - (uintptr_t)pvStart;
507	if (RT_LIKELY(offFrame < offSeg))
508	{
509	pvSeg = pvFrame;
510	cbSeg += offSeg - offFrame;
511	}
512	else
513	AssertMsgFailed(("pvFrame=%p pvStart=%p pvSeg=%p offSeg=%p cbSeg=%#zx offSegEnd=%p offFrame=%p maxlen=%#zx\n",
514	pvFrame, pvStart, pvSeg, offSeg, cbSeg, offSegEnd, offFrame, mbuf_maxlen(pMBuf)));
515	pvFrame = NULL;
516	}
517
518	AssertBreak(iSeg < cSegs);
519	pSG->cbTotal += cbSeg;
520	pSG->aSegs[iSeg].cb = cbSeg;
521	pSG->aSegs[iSeg].pv = pvSeg;
522	pSG->aSegs[iSeg].Phys = NIL_RTHCPHYS;
523	iSeg++;
524	}
525	/* The pvFrame might be in a now empty buffer. */
526	else if ( !iSeg
527	&& pvFrame
528	&& (uintptr_t)pvFrame - (uintptr_t)mbuf_datastart(pMBuf) < mbuf_maxlen(pMBuf))
529	{
530	cbSeg = (uintptr_t)mbuf_datastart(pMBuf) + mbuf_maxlen(pMBuf) - (uintptr_t)pvFrame;
531	pSG->cbTotal += cbSeg;
532	pSG->aSegs[iSeg].cb = cbSeg;
533	pSG->aSegs[iSeg].pv = pvFrame;
534	pSG->aSegs[iSeg].Phys = NIL_RTHCPHYS;
535	iSeg++;
536	pvFrame = NULL;
537	}
538	}
539
540	Assert(iSeg && iSeg <= cSegs);
541	pSG->cSegsUsed = iSeg;
542
543	#ifdef PADD_RUNT_FRAMES_FROM_HOST
544	/*
545	* Add a trailer if the frame is too small.
546	*
547	* Since we're getting to the packet before it is framed, it has not
548	* yet been padded. The current solution is to add a segment pointing
549	* to a buffer containing all zeros and pray that works for all frames...
550	*/
551	if (pSG->cbTotal < 60 && (fSrc & INTNETTRUNKDIR_HOST))
552	{
553	AssertReturnVoid(iSeg < cSegs);
554
555	static uint8_t const s_abZero[128] = {0};
556	pSG->aSegs[iSeg].Phys = NIL_RTHCPHYS;
557	pSG->aSegs[iSeg].pv = (void *)&s_abZero[0];
558	pSG->aSegs[iSeg].cb = 60 - pSG->cbTotal;
559	pSG->cbTotal = 60;
560	pSG->cSegsUsed++;
561	}
562	#endif
563
564	#ifdef VBOXNETFLT_DARWIN_TEST_SEG_SIZE
565	/*
566	* Redistribute the segments.
567	*/
568	if (pSG->cSegsUsed < pSG->cSegsAlloc)
569	{
570	/* copy the segments to the end. */
571	int iSrc = pSG->cSegsUsed;
572	int iDst = pSG->cSegsAlloc;
573	while (iSrc > 0)
574	{
575	iDst--;
576	iSrc--;
577	pSG->aSegs[iDst] = pSG->aSegs[iSrc];
578	}
579
580	/* create small segments from the start. */
581	pSG->cSegsUsed = pSG->cSegsAlloc;
582	iSrc = iDst;
583	iDst = 0;
584	while ( iDst < iSrc
585	&& iDst < pSG->cSegsAlloc)
586	{
587	pSG->aSegs[iDst].Phys = NIL_RTHCPHYS;
588	pSG->aSegs[iDst].pv = pSG->aSegs[iSrc].pv;
589	pSG->aSegs[iDst].cb = RT_MIN(pSG->aSegs[iSrc].cb, VBOXNETFLT_DARWIN_TEST_SEG_SIZE);
590	if (pSG->aSegs[iDst].cb != pSG->aSegs[iSrc].cb)
591	{
592	pSG->aSegs[iSrc].cb -= pSG->aSegs[iDst].cb;
593	pSG->aSegs[iSrc].pv = (uint8_t *)pSG->aSegs[iSrc].pv + pSG->aSegs[iDst].cb;
594	}
595	else if (++iSrc >= pSG->cSegsAlloc)
596	{
597	pSG->cSegsUsed = iDst + 1;
598	break;
599	}
600	iDst++;
601	}
602	}
603	#endif
604
605	AssertMsg(!pvFrame, ("pvFrame=%p pMBuf=%p iSeg=%d\n", pvFrame, pMBuf, iSeg));
606	}
607
608
609	/**
610	* Helper for determining whether the host wants the interface to be
611	* promiscuous.
612	*/
613	static bool vboxNetFltDarwinIsPromiscuous(PVBOXNETFLTINS pThis)
614	{
615	bool fRc = false;
616	ifnet_t pIfNet = vboxNetFltDarwinRetainIfNet(pThis);
617	if (pIfNet)
618	{
619	/* gather the data */
620	uint16_t fIf = ifnet_flags(pIfNet);
621	unsigned cPromisc = VBOX_GET_PCOUNT(pIfNet);
622	bool fSetPromiscuous = ASMAtomicUoReadBool(&pThis->u.s.fSetPromiscuous);
623	vboxNetFltDarwinReleaseIfNet(pThis, pIfNet);
624
625	/* calc the return. */
626	fRc = (fIf & IFF_PROMISC)
627	&& cPromisc > fSetPromiscuous;
628	}
629	return fRc;
630	}
631
632
633
634	/**
635	*
636	* @see iff_detached_func in the darwin kpi.
637	*/
638	static void vboxNetFltDarwinIffDetached(void *pvThis, ifnet_t pIfNet)
639	{
640	PVBOXNETFLTINS pThis = (PVBOXNETFLTINS)pvThis;
641	RTSPINLOCKTMP Tmp = RTSPINLOCKTMP_INITIALIZER;
642	uint64_t NanoTS = RTTimeSystemNanoTS();
643	LogFlow(("vboxNetFltDarwinIffDetached: pThis=%p NanoTS=%RU64 (%d)\n",
644	pThis, NanoTS, VALID_PTR(pIfNet) ? VBOX_GET_PCOUNT(pIfNet) : -1));
645
646	Assert(!pThis->fDisconnectedFromHost);
647	Assert(!pThis->fRediscoveryPending);
648
649	/*
650	* If we've put it into promiscuous mode, undo that now. If we don't
651	* the if_pcount will go all wrong when it's replugged.
652	*/
653	if (ASMAtomicXchgBool(&pThis->u.s.fSetPromiscuous, false))
654	ifnet_set_promiscuous(pIfNet, 0);
655
656	/*
657	* We carefully take the spinlock and increase the interface reference
658	* behind it in order to avoid problematic races with the detached callback.
659	*/
660	RTSpinlockAcquireNoInts(pThis->hSpinlock, &Tmp);
661
662	pIfNet = ASMAtomicUoReadPtrT(&pThis->u.s.pIfNet, ifnet_t);
663	int cPromisc = VALID_PTR(pIfNet) ? VBOX_GET_PCOUNT(pIfNet) : - 1;
664
665	ASMAtomicUoWriteNullPtr(&pThis->u.s.pIfNet);
666	ASMAtomicUoWriteNullPtr(&pThis->u.s.pIfFilter);
667	ASMAtomicWriteBool(&pThis->u.s.fNeedSetPromiscuous, false);
668	pThis->u.s.fSetPromiscuous = false;
669	ASMAtomicUoWriteU64(&pThis->NanoTSLastRediscovery, NanoTS);
670	ASMAtomicUoWriteBool(&pThis->fRediscoveryPending, false);
671	ASMAtomicWriteBool(&pThis->fDisconnectedFromHost, true);
672
673	RTSpinlockReleaseNoInts(pThis->hSpinlock, &Tmp);
674
675	if (pIfNet)
676	ifnet_release(pIfNet);
677	LogRel(("VBoxNetFlt: was detached from '%s' (%d)\n", pThis->szName, cPromisc));
678	}
679
680
681	/**
682	*
683	* @see iff_ioctl_func in the darwin kpi.
684	*/
685	static errno_t vboxNetFltDarwinIffIoCtl(void pvThis, ifnet_t pIfNet, protocol_family_t eProtocol, u_long uCmd, void pvArg)
686	{
687	PVBOXNETFLTINS pThis = (PVBOXNETFLTINS)pvThis;
688	LogFlow(("vboxNetFltDarwinIffIoCtl: pThis=%p uCmd=%lx\n", pThis, uCmd));
689
690	/*
691	* Update fOtherPromiscuous.
692	*/
693	/** @todo we'll have to find the offset of if_pcount to get this right! */
694	//if (uCmd == SIOCSIFFLAGS)
695	//{
696	//
697	//}
698
699	/*
700	* We didn't handle it, continue processing.
701	*/
702	NOREF(pThis);
703	NOREF(eProtocol);
704	NOREF(uCmd);
705	NOREF(pvArg);
706	return EOPNOTSUPP;
707	}
708
709
710	/**
711	*
712	* @see iff_event_func in the darwin kpi.
713	*/
714	static void vboxNetFltDarwinIffEvent(void pvThis, ifnet_t pIfNet, protocol_family_t eProtocol, const struct kev_msg pEvMsg)
715	{
716	PVBOXNETFLTINS pThis = (PVBOXNETFLTINS)pvThis;
717	LogFlow(("vboxNetFltDarwinIffEvent: pThis=%p\n", pThis));
718
719	NOREF(pThis);
720	NOREF(pIfNet);
721	NOREF(eProtocol);
722	NOREF(pEvMsg);
723
724	/*
725	* Watch out for the interface going online / offline.
726	*/
727	if ( VALID_PTR(pThis)
728	&& VALID_PTR(pEvMsg)
729	&& pEvMsg->vendor_code == KEV_VENDOR_APPLE
730	&& pEvMsg->kev_class == KEV_NETWORK_CLASS
731	&& pEvMsg->kev_subclass == KEV_DL_SUBCLASS)
732	{
733	if (pThis->u.s.pIfNet == pIfNet)
734	{
735	if (pEvMsg->event_code == KEV_DL_LINK_ON)
736	{
737	if (ASMAtomicUoReadBool(&pThis->u.s.fNeedSetPromiscuous))
738	{
739	/* failed to bring it online. */
740	errno_t err = ifnet_set_promiscuous(pIfNet, 1);
741	if (!err)
742	{
743	ASMAtomicWriteBool(&pThis->u.s.fSetPromiscuous, true);
744	ASMAtomicWriteBool(&pThis->u.s.fNeedSetPromiscuous, false);
745	Log(("vboxNetFltDarwinIffEvent: enabled promiscuous mode on %s (%d)\n", pThis->szName, VBOX_GET_PCOUNT(pIfNet)));
746	}
747	else
748	Log(("vboxNetFltDarwinIffEvent: ifnet_set_promiscuous failed on %s, err=%d (%d)\n", pThis->szName, err, VBOX_GET_PCOUNT(pIfNet)));
749	}
750	else if ( ASMAtomicUoReadBool(&pThis->u.s.fSetPromiscuous)
751	&& !(ifnet_flags(pIfNet) & IFF_PROMISC))
752	{
753	/* Try fix the inconsistency. */
754	errno_t err = ifnet_set_flags(pIfNet, IFF_PROMISC, IFF_PROMISC);
755	if (!err)
756	err = ifnet_ioctl(pIfNet, 0, SIOCSIFFLAGS, NULL);
757	if (!err && (ifnet_flags(pIfNet) & IFF_PROMISC))
758	Log(("vboxNetFltDarwinIffEvent: fixed IFF_PROMISC on %s (%d)\n", pThis->szName, VBOX_GET_PCOUNT(pIfNet)));
759	else
760	Log(("vboxNetFltDarwinIffEvent: failed to fix IFF_PROMISC on %s, err=%d flags=%#x (%d)\n",
761	pThis->szName, err, ifnet_flags(pIfNet), VBOX_GET_PCOUNT(pIfNet)));
762	}
763	else
764	Log(("vboxNetFltDarwinIffEvent: online, '%s'. flags=%#x (%d)\n", pThis->szName, ifnet_flags(pIfNet), VBOX_GET_PCOUNT(pIfNet)));
765	}
766	else if (pEvMsg->event_code == KEV_DL_LINK_OFF)
767	Log(("vboxNetFltDarwinIffEvent: %s goes down (%d)\n", pThis->szName, VBOX_GET_PCOUNT(pIfNet)));
768	/** @todo KEV_DL_LINK_ADDRESS_CHANGED -> pfnReportMacAddress */
769	/** @todo KEV_DL_SIFFLAGS -> pfnReportPromiscuousMode */
770	}
771	else
772	Log(("vboxNetFltDarwinIffEvent: pThis->u.s.pIfNet=%p pIfNet=%p (%d)\n", pThis->u.s.pIfNet, pIfNet, VALID_PTR(pIfNet) ? VBOX_GET_PCOUNT(pIfNet) : -1));
773	}
774	else if (VALID_PTR(pEvMsg))
775	Log(("vboxNetFltDarwinIffEvent: vendor_code=%#x kev_class=%#x kev_subclass=%#x event_code=%#x\n",
776	pEvMsg->vendor_code, pEvMsg->kev_class, pEvMsg->kev_subclass, pEvMsg->event_code));
777	}
778
779
780	/**
781	* Internal worker for vboxNetFltDarwinIffInput and vboxNetFltDarwinIffOutput,
782	*
783	* @returns 0 or EJUSTRETURN.
784	* @param pThis The instance.
785	* @param pMBuf The mbuf.
786	* @param pvFrame The start of the frame, optional.
787	* @param fSrc Where the packet (allegedly) comes from, one INTNETTRUNKDIR_* value.
788	* @param eProtocol The protocol.
789	*/
790	static errno_t vboxNetFltDarwinIffInputOutputWorker(PVBOXNETFLTINS pThis, mbuf_t pMBuf, void *pvFrame,
791	uint32_t fSrc, protocol_family_t eProtocol)
792	{
793	/*
794	* Drop it immediately?
795	*/
796	Log2(("vboxNetFltDarwinIffInputOutputWorker: pThis=%p pMBuf=%p pvFrame=%p fSrc=%#x cbPkt=%x\n",
797	pThis, pMBuf, pvFrame, fSrc, pMBuf ? mbuf_pkthdr_len(pMBuf) : -1));
798	if (!pMBuf)
799	return 0;
800	#if 0 /* debugging lost icmp packets */
801	if (mbuf_pkthdr_len(pMBuf) > 0x300)
802	{
803	uint8_t pb = (uint8_t )(pvFrame ? pvFrame : mbuf_data(pMBuf));
804	Log3(("D=%.6Rhxs S=%.6Rhxs T=%04x IFF\n", pb, pb + 6, RT_BE2H_U16((uint16_t )(pb + 12))));
805	}
806	#endif
807	if (vboxNetFltDarwinMBufIsOur(pThis, pMBuf, pvFrame))
808	return 0;
809
810	/*
811	* Active? Retain the instance and increment the busy counter.
812	*/
813	if (!vboxNetFltTryRetainBusyActive(pThis))
814	return 0;
815
816	/*
817	* Finalize out-bound packets since the stack puts off finalizing
818	* TCP/IP checksums as long as possible.
819	* ASSUMES this only applies to outbound IP packets.
820	*/
821	if ( (fSrc & INTNETTRUNKDIR_HOST)
822	&& eProtocol == PF_INET)
823	{
824	Assert(!pvFrame);
825	mbuf_outbound_finalize(pMBuf, eProtocol, sizeof(RTNETETHERHDR));
826	}
827
828	/*
829	* Create a (scatter/)gather list for the mbuf and feed it to the internal network.
830	*/
831	bool fDropIt = false;
832	unsigned cSegs = vboxNetFltDarwinMBufCalcSGSegs(pThis, pMBuf, pvFrame);
833	if (cSegs < VBOXNETFLT_DARWIN_MAX_SEGS)
834	{
835	PINTNETSG pSG = (PINTNETSG)alloca(RT_OFFSETOF(INTNETSG, aSegs[cSegs]));
836	vboxNetFltDarwinMBufToSG(pThis, pMBuf, pvFrame, pSG, cSegs, fSrc);
837
838	fDropIt = pThis->pSwitchPort->pfnRecv(pThis->pSwitchPort, NULL /* pvIf */, pSG, fSrc);
839	if (fDropIt)
840	mbuf_freem(pMBuf);
841	}
842
843	vboxNetFltRelease(pThis, true /* fBusy */);
844
845	return fDropIt ? EJUSTRETURN : 0;
846	}
847
848
849	/**
850	* From the host.
851	*
852	* @see iff_output_func in the darwin kpi.
853	*/
854	static errno_t vboxNetFltDarwinIffOutput(void pvThis, ifnet_t pIfNet, protocol_family_t eProtocol, mbuf_t ppMBuf)
855	{
856	/** @todo there was some note about the ethernet header here or something like that... */
857
858	NOREF(eProtocol);
859	NOREF(pIfNet);
860	return vboxNetFltDarwinIffInputOutputWorker((PVBOXNETFLTINS)pvThis, *ppMBuf, NULL, INTNETTRUNKDIR_HOST, eProtocol);
861	}
862
863
864	/**
865	* From the wire.
866	*
867	* @see iff_input_func in the darwin kpi.
868	*/
869	static errno_t vboxNetFltDarwinIffInput(void pvThis, ifnet_t pIfNet, protocol_family_t eProtocol, mbuf_t ppMBuf, char **ppchFrame)
870	{
871	NOREF(eProtocol);
872	NOREF(pIfNet);
873	return vboxNetFltDarwinIffInputOutputWorker((PVBOXNETFLTINS)pvThis, ppMBuf, ppchFrame, INTNETTRUNKDIR_WIRE, eProtocol);
874	}
875
876
877	/**
878	* Internal worker for vboxNetFltOsInitInstance and vboxNetFltOsMaybeRediscovered.
879	*
880	* @returns VBox status code.
881	* @param pThis The instance.
882	* @param fRediscovery If set we're doing a rediscovery attempt, so, don't
883	* flood the release log.
884	*/
885	static int vboxNetFltDarwinAttachToInterface(PVBOXNETFLTINS pThis, bool fRediscovery)
886	{
887	LogFlow(("vboxNetFltDarwinAttachToInterface: pThis=%p (%s)\n", pThis, pThis->szName));
888
889	/*
890	* Locate the interface first.
891	*
892	* The pIfNet member is updated before iflt_attach is called and used
893	* to deal with the hypothetical case where someone rips out the
894	* interface immediately after our iflt_attach call.
895	*/
896	ifnet_t pIfNet = NULL;
897	errno_t err = ifnet_find_by_name(pThis->szName, &pIfNet);
898	if (err)
899	{
900	Assert(err == ENXIO);
901	if (!fRediscovery)
902	LogRel(("VBoxFltDrv: failed to find ifnet '%s' (err=%d)\n", pThis->szName, err));
903	else
904	Log(("VBoxFltDrv: failed to find ifnet '%s' (err=%d)\n", pThis->szName, err));
905	return VERR_INTNET_FLT_IF_NOT_FOUND;
906	}
907
908	RTSPINLOCKTMP Tmp = RTSPINLOCKTMP_INITIALIZER;
909	RTSpinlockAcquireNoInts(pThis->hSpinlock, &Tmp);
910	ASMAtomicUoWritePtr(&pThis->u.s.pIfNet, pIfNet);
911	RTSpinlockReleaseNoInts(pThis->hSpinlock, &Tmp);
912
913	/*
914	* Get the mac address while we still have a valid ifnet reference.
915	*/
916	err = ifnet_lladdr_copy_bytes(pIfNet, &pThis->u.s.MacAddr, sizeof(pThis->u.s.MacAddr));
917	if (!err)
918	{
919	/*
920	* Try attach the filter.
921	*/
922	struct iff_filter RegRec;
923	RegRec.iff_cookie = pThis;
924	RegRec.iff_name = "VBoxNetFlt";
925	RegRec.iff_protocol = 0;
926	RegRec.iff_input = vboxNetFltDarwinIffInput;
927	RegRec.iff_output = vboxNetFltDarwinIffOutput;
928	RegRec.iff_event = vboxNetFltDarwinIffEvent;
929	RegRec.iff_ioctl = vboxNetFltDarwinIffIoCtl;
930	RegRec.iff_detached = vboxNetFltDarwinIffDetached;
931	interface_filter_t pIfFilter = NULL;
932	err = iflt_attach(pIfNet, &RegRec, &pIfFilter);
933	Assert(err \|\| pIfFilter);
934
935	RTSpinlockAcquireNoInts(pThis->hSpinlock, &Tmp);
936	pIfNet = ASMAtomicUoReadPtrT(&pThis->u.s.pIfNet, ifnet_t);
937	if (pIfNet && !err)
938	{
939	ASMAtomicUoWriteBool(&pThis->fDisconnectedFromHost, false);
940	ASMAtomicUoWritePtr(&pThis->u.s.pIfFilter, pIfFilter);
941	pIfNet = NULL; /* don't dereference it */
942	}
943	RTSpinlockReleaseNoInts(pThis->hSpinlock, &Tmp);
944
945	/* Report capabilities. */
946	if ( !pIfNet
947	&& vboxNetFltTryRetainBusyNotDisconnected(pThis))
948	{
949	Assert(pThis->pSwitchPort);
950	pThis->pSwitchPort->pfnReportMacAddress(pThis->pSwitchPort, &pThis->u.s.MacAddr);
951	pThis->pSwitchPort->pfnReportPromiscuousMode(pThis->pSwitchPort, vboxNetFltDarwinIsPromiscuous(pThis));
952	pThis->pSwitchPort->pfnReportGsoCapabilities(pThis->pSwitchPort, 0, INTNETTRUNKDIR_WIRE \| INTNETTRUNKDIR_HOST);
953	pThis->pSwitchPort->pfnReportNoPreemptDsts(pThis->pSwitchPort, 0 /* none */);
954	vboxNetFltRelease(pThis, true /fBusy/);
955	}
956	}
957
958	/* Release the interface on failure. */
959	if (pIfNet)
960	ifnet_release(pIfNet);
961
962	int rc = RTErrConvertFromErrno(err);
963	if (RT_SUCCESS(rc))
964	LogRel(("VBoxFltDrv: attached to '%s' / %.*Rhxs\n", pThis->szName, sizeof(pThis->u.s.MacAddr), &pThis->u.s.MacAddr));
965	else
966	LogRel(("VBoxFltDrv: failed to attach to ifnet '%s' (err=%d)\n", pThis->szName, err));
967	return rc;
968	}
969
970
971	bool vboxNetFltOsMaybeRediscovered(PVBOXNETFLTINS pThis)
972	{
973	vboxNetFltDarwinAttachToInterface(pThis, true /* fRediscovery */);
974	return !ASMAtomicUoReadBool(&pThis->fDisconnectedFromHost);
975	}
976
977
978	int vboxNetFltPortOsXmit(PVBOXNETFLTINS pThis, void *pvIfData, PINTNETSG pSG, uint32_t fDst)
979	{
980	NOREF(pvIfData);
981
982	int rc = VINF_SUCCESS;
983	ifnet_t pIfNet = vboxNetFltDarwinRetainIfNet(pThis);
984	if (pIfNet)
985	{
986	/*
987	* Create a mbuf for the gather list and push it onto the wire.
988	*/
989	if (fDst & INTNETTRUNKDIR_WIRE)
990	{
991	mbuf_t pMBuf = vboxNetFltDarwinMBufFromSG(pThis, pSG);
992	if (pMBuf)
993	{
994	errno_t err = ifnet_output_raw(pIfNet, PF_LINK, pMBuf);
995	if (err)
996	rc = RTErrConvertFromErrno(err);
997	}
998	else
999	rc = VERR_NO_MEMORY;
1000	}
1001
1002	/*
1003	* Create a mbuf for the gather list and push it onto the host stack.
1004	*/
1005	if (fDst & INTNETTRUNKDIR_HOST)
1006	{
1007	mbuf_t pMBuf = vboxNetFltDarwinMBufFromSG(pThis, pSG);
1008	if (pMBuf)
1009	{
1010	/* This is what IONetworkInterface::inputPacket does. */
1011	unsigned const cbEthHdr = 14;
1012	mbuf_pkthdr_setheader(pMBuf, mbuf_data(pMBuf));
1013	mbuf_pkthdr_setlen(pMBuf, mbuf_pkthdr_len(pMBuf) - cbEthHdr);
1014	mbuf_setdata(pMBuf, (uint8_t *)mbuf_data(pMBuf) + cbEthHdr, mbuf_len(pMBuf) - cbEthHdr);
1015	mbuf_pkthdr_setrcvif(pMBuf, pIfNet); /* will crash without this. */
1016
1017	errno_t err = ifnet_input(pIfNet, pMBuf, NULL);
1018	if (err)
1019	rc = RTErrConvertFromErrno(err);
1020	}
1021	else
1022	rc = VERR_NO_MEMORY;
1023	}
1024
1025	vboxNetFltDarwinReleaseIfNet(pThis, pIfNet);
1026	}
1027
1028	return rc;
1029	}
1030
1031
1032	void vboxNetFltPortOsSetActive(PVBOXNETFLTINS pThis, bool fActive)
1033	{
1034	ifnet_t pIfNet = vboxNetFltDarwinRetainIfNet(pThis);
1035	if (pIfNet)
1036	{
1037	if (pThis->fDisablePromiscuous)
1038	{
1039	/*
1040	* Promiscuous mode should not be used (wireless), we just need to
1041	* make sure the interface is up.
1042	*/
1043	if (fActive)
1044	{
1045	u_int16_t fIf = ifnet_flags(pIfNet);
1046	if ((fIf & (IFF_UP \| IFF_RUNNING)) != (IFF_UP \| IFF_RUNNING))
1047	{
1048	ifnet_set_flags(pIfNet, IFF_UP, IFF_UP);
1049	ifnet_ioctl(pIfNet, 0, SIOCSIFFLAGS, NULL);
1050	}
1051	}
1052	}
1053	else
1054	{
1055	/*
1056	* This api is a bit weird, the best reference is the code.
1057	*
1058	* Also, we have a bit or race conditions wrt the maintance of
1059	* host the interface promiscuity for vboxNetFltPortOsIsPromiscuous.
1060	*/
1061	unsigned const cPromiscBefore = VBOX_GET_PCOUNT(pIfNet);
1062	u_int16_t fIf;
1063	if (fActive)
1064	{
1065	Assert(!pThis->u.s.fSetPromiscuous);
1066	errno_t err = ENETDOWN;
1067	ASMAtomicWriteBool(&pThis->u.s.fNeedSetPromiscuous, true);
1068
1069	/*
1070	* Try bring the interface up and running if it's down.
1071	*/
1072	fIf = ifnet_flags(pIfNet);
1073	if ((fIf & (IFF_UP \| IFF_RUNNING)) != (IFF_UP \| IFF_RUNNING))
1074	{
1075	err = ifnet_set_flags(pIfNet, IFF_UP, IFF_UP);
1076	errno_t err2 = ifnet_ioctl(pIfNet, 0, SIOCSIFFLAGS, NULL);
1077	if (!err)
1078	err = err2;
1079	fIf = ifnet_flags(pIfNet);
1080	}
1081
1082	/*
1083	* Is it already up? If it isn't, leave it to the link event or
1084	* we'll upset if_pcount (as stated above, ifnet_set_promiscuous is weird).
1085	*/
1086	if ((fIf & (IFF_UP \| IFF_RUNNING)) == (IFF_UP \| IFF_RUNNING))
1087	{
1088	err = ifnet_set_promiscuous(pIfNet, 1);
1089	pThis->u.s.fSetPromiscuous = err == 0;
1090	if (!err)
1091	{
1092	ASMAtomicWriteBool(&pThis->u.s.fNeedSetPromiscuous, false);
1093
1094	/* check if it actually worked, this stuff is not always behaving well. */
1095	if (!(ifnet_flags(pIfNet) & IFF_PROMISC))
1096	{
1097	err = ifnet_set_flags(pIfNet, IFF_PROMISC, IFF_PROMISC);
1098	if (!err)
1099	err = ifnet_ioctl(pIfNet, 0, SIOCSIFFLAGS, NULL);
1100	if (!err)
1101	Log(("vboxNetFlt: fixed IFF_PROMISC on %s (%d->%d)\n", pThis->szName, cPromiscBefore, VBOX_GET_PCOUNT(pIfNet)));
1102	else
1103	Log(("VBoxNetFlt: failed to fix IFF_PROMISC on %s, err=%d (%d->%d)\n",
1104	pThis->szName, err, cPromiscBefore, VBOX_GET_PCOUNT(pIfNet)));
1105	}
1106	}
1107	else
1108	Log(("VBoxNetFlt: ifnet_set_promiscuous -> err=%d grr! (%d->%d)\n", err, cPromiscBefore, VBOX_GET_PCOUNT(pIfNet)));
1109	}
1110	else if (!err)
1111	Log(("VBoxNetFlt: Waiting for the link to come up... (%d->%d)\n", cPromiscBefore, VBOX_GET_PCOUNT(pIfNet)));
1112	if (err)
1113	LogRel(("VBoxNetFlt: Failed to put '%s' into promiscuous mode, err=%d (%d->%d)\n", pThis->szName, err, cPromiscBefore, VBOX_GET_PCOUNT(pIfNet)));
1114	}
1115	else
1116	{
1117	ASMAtomicWriteBool(&pThis->u.s.fNeedSetPromiscuous, false);
1118	if (pThis->u.s.fSetPromiscuous)
1119	{
1120	errno_t err = ifnet_set_promiscuous(pIfNet, 0);
1121	AssertMsg(!err, ("%d\n", err)); NOREF(err);
1122	}
1123	pThis->u.s.fSetPromiscuous = false;
1124
1125	fIf = ifnet_flags(pIfNet);
1126	Log(("VBoxNetFlt: fIf=%#x; %d->%d\n", fIf, cPromiscBefore, VBOX_GET_PCOUNT(pIfNet)));
1127	}
1128	}
1129
1130	vboxNetFltDarwinReleaseIfNet(pThis, pIfNet);
1131	}
1132	}
1133
1134
1135	int vboxNetFltOsDisconnectIt(PVBOXNETFLTINS pThis)
1136	{
1137	/* Nothing to do here. */
1138	return VINF_SUCCESS;
1139	}
1140
1141
1142	int vboxNetFltOsConnectIt(PVBOXNETFLTINS pThis)
1143	{
1144	/* Nothing to do here. */
1145	return VINF_SUCCESS;
1146	}
1147
1148
1149	void vboxNetFltOsDeleteInstance(PVBOXNETFLTINS pThis)
1150	{
1151	RTSPINLOCKTMP Tmp = RTSPINLOCKTMP_INITIALIZER;
1152	interface_filter_t pIfFilter;
1153
1154	/*
1155	* Carefully obtain the interface filter reference and detach it.
1156	*/
1157	RTSpinlockAcquireNoInts(pThis->hSpinlock, &Tmp);
1158	pIfFilter = ASMAtomicUoReadPtrT(&pThis->u.s.pIfFilter, interface_filter_t);
1159	if (pIfFilter)
1160	ASMAtomicUoWriteNullPtr(&pThis->u.s.pIfFilter);
1161	RTSpinlockReleaseNoInts(pThis->hSpinlock, &Tmp);
1162
1163	if (pIfFilter)
1164	iflt_detach(pIfFilter);
1165	}
1166
1167
1168	int vboxNetFltOsInitInstance(PVBOXNETFLTINS pThis, void *pvContext)
1169	{
1170	NOREF(pvContext);
1171	return vboxNetFltDarwinAttachToInterface(pThis, false /* fRediscovery */);
1172	}
1173
1174
1175	int vboxNetFltOsPreInitInstance(PVBOXNETFLTINS pThis)
1176	{
1177	/*
1178	* Init the darwin specific members.
1179	*/
1180	pThis->u.s.pIfNet = NULL;
1181	pThis->u.s.pIfFilter = NULL;
1182	pThis->u.s.fSetPromiscuous = false;
1183	pThis->u.s.fNeedSetPromiscuous = false;
1184	//pThis->u.s.MacAddr = {0};
1185
1186	return VINF_SUCCESS;
1187	}
1188
1189
1190	void vboxNetFltPortOsNotifyMacAddress(PVBOXNETFLTINS pThis, void *pvIfData, PCRTMAC pMac)
1191	{
1192	NOREF(pThis); NOREF(pvIfData); NOREF(pMac);
1193	}
1194
1195
1196	int vboxNetFltPortOsConnectInterface(PVBOXNETFLTINS pThis, void pvIf, void *ppvIfData)
1197	{
1198	/* Nothing to do */
1199	NOREF(pThis); NOREF(pvIf); NOREF(ppvIfData);
1200	return VINF_SUCCESS;
1201	}
1202
1203
1204	int vboxNetFltPortOsDisconnectInterface(PVBOXNETFLTINS pThis, void *pvIfData)
1205	{
1206	/* Nothing to do */
1207	NOREF(pThis); NOREF(pvIfData);
1208	return VINF_SUCCESS;
1209	}
1210

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source: vbox/trunk/src/VBox/HostDrivers/VBoxNetFlt/darwin/VBoxNetFlt-darwin.cpp@ 32740

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