VBoxNetAdp-darwin.cpp@ 57907

Last change on this file since 57907 was 57907, checked in by vboxsync, 9 years ago
VBoxNetAdp/darwin: use bpfattach() without tap and send callbacks. Default behavior is fine and we get bpf packet injection for free.
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
File size: 16.8 KB

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1	/* $Id: VBoxNetAdp-darwin.cpp 57907 2015-09-26 03:35:03Z vboxsync $ */
2	/** @file
3	* VBoxNetAdp - Virtual Network Adapter Driver (Host), Darwin Specific Code.
4	*/
5
6	/*
7	* Copyright (C) 2008-2015 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	/*********************************************************************************************************************************
20	* Header Files *
21	*********************************************************************************************************************************/
22	#define LOG_GROUP LOG_GROUP_NET_ADP_DRV
23	#include "../../../Runtime/r0drv/darwin/the-darwin-kernel.h"
24
25	#include <VBox/log.h>
26	#include <VBox/err.h>
27	#include <VBox/version.h>
28	#include <iprt/assert.h>
29	#include <iprt/initterm.h>
30	#include <iprt/semaphore.h>
31	#include <iprt/spinlock.h>
32	#include <iprt/string.h>
33	#include <iprt/uuid.h>
34	#include <iprt/alloca.h>
35
36	#include "../../darwin/VBoxNetSend.h"
37
38	#include <sys/systm.h>
39	RT_C_DECLS_BEGIN /* Buggy 10.4 headers, fixed in 10.5. */
40	#include <sys/kpi_mbuf.h>
41	RT_C_DECLS_END
42
43	#include <net/ethernet.h>
44	#include <net/if_ether.h>
45	#include <net/if_types.h>
46	#include <sys/socket.h>
47	#include <net/if.h>
48	#include <net/if_dl.h>
49	#include <sys/errno.h>
50	#include <sys/param.h>
51	#include <sys/conf.h>
52	#include <miscfs/devfs/devfs.h>
53	RT_C_DECLS_BEGIN
54	#include <net/bpf.h>
55	RT_C_DECLS_END
56
57	#define VBOXNETADP_OS_SPECFIC 1
58	#include "../VBoxNetAdpInternal.h"
59
60
61	/*********************************************************************************************************************************
62	* Defined Constants And Macros *
63	*********************************************************************************************************************************/
64	/** The maximum number of SG segments.
65	* Used to prevent stack overflow and similar bad stuff. */
66	#define VBOXNETADP_DARWIN_MAX_SEGS 32
67	#define VBOXNETADP_DARWIN_MAX_FAMILIES 4
68	#define VBOXNETADP_DARWIN_NAME "vboxnet"
69	#define VBOXNETADP_DARWIN_MTU 1500
70	#define VBOXNETADP_DARWIN_DETACH_TIMEOUT 500
71
72	#define VBOXNETADP_FROM_IFACE(iface) ((PVBOXNETADP) ifnet_softc(iface))
73
74
75	/*********************************************************************************************************************************
76	* Internal Functions *
77	*********************************************************************************************************************************/
78	RT_C_DECLS_BEGIN
79	static kern_return_t VBoxNetAdpDarwinStart(struct kmod_info pKModInfo, void pvData);
80	static kern_return_t VBoxNetAdpDarwinStop(struct kmod_info pKModInfo, void pvData);
81	RT_C_DECLS_END
82
83	static int VBoxNetAdpDarwinOpen(dev_t Dev, int fFlags, int fDevType, struct proc *pProcess);
84	static int VBoxNetAdpDarwinClose(dev_t Dev, int fFlags, int fDevType, struct proc *pProcess);
85	static int VBoxNetAdpDarwinIOCtl(dev_t Dev, u_long iCmd, caddr_t pData, int fFlags, struct proc *pProcess);
86
87
88	/*********************************************************************************************************************************
89	* Global Variables *
90	*********************************************************************************************************************************/
91	/**
92	* Declare the module stuff.
93	*/
94	RT_C_DECLS_BEGIN
95	extern kern_return_t _start(struct kmod_info pKModInfo, void pvData);
96	extern kern_return_t _stop(struct kmod_info pKModInfo, void pvData);
97
98	KMOD_EXPLICIT_DECL(VBoxNetAdp, VBOX_VERSION_STRING, _start, _stop)
99	DECLHIDDEN(kmod_start_func_t *) _realmain = VBoxNetAdpDarwinStart;
100	DECLHIDDEN(kmod_stop_func_t *) _antimain = VBoxNetAdpDarwinStop;
101	DECLHIDDEN(int) _kext_apple_cc = __APPLE_CC__;
102	RT_C_DECLS_END
103
104	/**
105	* The (common) global data.
106	*/
107	static int g_nCtlDev = -1; /* Major dev number */
108	static void g_hCtlDev = 0; / FS dev handle */
109
110	/**
111	* The character device switch table for the driver.
112	*/
113	static struct cdevsw g_ChDev =
114	{
115	/.d_open = /VBoxNetAdpDarwinOpen,
116	/.d_close = /VBoxNetAdpDarwinClose,
117	/.d_read = /eno_rdwrt,
118	/.d_write = /eno_rdwrt,
119	/.d_ioctl = /VBoxNetAdpDarwinIOCtl,
120	/.d_stop = /eno_stop,
121	/.d_reset = /eno_reset,
122	/.d_ttys = /NULL,
123	/.d_select = /eno_select,
124	/.d_mmap = /eno_mmap,
125	/.d_strategy = /eno_strat,
126	/.d_getc = /eno_getc,
127	/.d_putc = /eno_putc,
128	/.d_type = /0
129	};
130
131
132
133	static void vboxNetAdpDarwinComposeUUID(PVBOXNETADP pThis, PRTUUID pUuid)
134	{
135	/* Generate UUID from name and MAC address. */
136	RTUuidClear(pUuid);
137	memcpy(pUuid->au8, "vboxnet", 7);
138	pUuid->Gen.u8ClockSeqHiAndReserved = (pUuid->Gen.u8ClockSeqHiAndReserved & 0x3f) \| 0x80;
139	pUuid->Gen.u16TimeHiAndVersion = (pUuid->Gen.u16TimeHiAndVersion & 0x0fff) \| 0x4000;
140	pUuid->Gen.u8ClockSeqLow = pThis->iUnit;
141	vboxNetAdpComposeMACAddress(pThis, (PRTMAC)pUuid->Gen.au8Node);
142	}
143
144	static errno_t vboxNetAdpDarwinOutput(ifnet_t pIface, mbuf_t pMBuf)
145	{
146	/*
147	* We are a dummy interface with all the real work done in
148	* VBoxNetFlt bridged networking filter. If anything makes it
149	* this far, just drop it, we have nowhere to send it to.
150	*/
151	mbuf_freem_list(pMBuf);
152	return 0;
153	}
154
155	static void vboxNetAdpDarwinAttachFamily(PVBOXNETADP pThis, protocol_family_t Family)
156	{
157	u_int32_t i;
158	for (i = 0; i < VBOXNETADP_MAX_FAMILIES; i++)
159	if (pThis->u.s.aAttachedFamilies[i] == 0)
160	{
161	pThis->u.s.aAttachedFamilies[i] = Family;
162	break;
163	}
164	}
165
166	static void vboxNetAdpDarwinDetachFamily(PVBOXNETADP pThis, protocol_family_t Family)
167	{
168	u_int32_t i;
169	for (i = 0; i < VBOXNETADP_MAX_FAMILIES; i++)
170	if (pThis->u.s.aAttachedFamilies[i] == Family)
171	pThis->u.s.aAttachedFamilies[i] = 0;
172	}
173
174	static errno_t vboxNetAdpDarwinAddProto(ifnet_t pIface, protocol_family_t Family, const struct ifnet_demux_desc *pDemuxDesc, u_int32_t nDesc)
175	{
176	PVBOXNETADP pThis = VBOXNETADP_FROM_IFACE(pIface);
177	Assert(pThis);
178	vboxNetAdpDarwinAttachFamily(pThis, Family);
179	LogFlow(("vboxNetAdpAddProto: Family=%d.\n", Family));
180	return ether_add_proto(pIface, Family, pDemuxDesc, nDesc);
181	}
182
183	static errno_t vboxNetAdpDarwinDelProto(ifnet_t pIface, protocol_family_t Family)
184	{
185	PVBOXNETADP pThis = VBOXNETADP_FROM_IFACE(pIface);
186	Assert(pThis);
187	LogFlow(("vboxNetAdpDelProto: Family=%d.\n", Family));
188	vboxNetAdpDarwinDetachFamily(pThis, Family);
189	return ether_del_proto(pIface, Family);
190	}
191
192	static void vboxNetAdpDarwinDetach(ifnet_t pIface)
193	{
194	PVBOXNETADP pThis = VBOXNETADP_FROM_IFACE(pIface);
195	Assert(pThis);
196	Log2(("vboxNetAdpDarwinDetach: Signaling detach to vboxNetAdpUnregisterDevice.\n"));
197	/* Let vboxNetAdpDarwinUnregisterDevice know that the interface has been detached. */
198	RTSemEventSignal(pThis->u.s.hEvtDetached);
199	}
200
201	static errno_t vboxNetAdpDarwinDemux(ifnet_t pIface, mbuf_t pMBuf,
202	char *pFrameHeader,
203	protocol_family_t *pProtocolFamily)
204	{
205	/*
206	* Anything we get here comes from VBoxNetFlt bridged networking
207	* filter where it has already been accounted for and fed to bpf.
208	*/
209	return ether_demux(pIface, pMBuf, pFrameHeader, pProtocolFamily);
210	}
211
212	int vboxNetAdpOsCreate(PVBOXNETADP pThis, PCRTMAC pMACAddress)
213	{
214	int rc;
215	struct ifnet_init_params Params;
216	RTUUID uuid;
217	struct sockaddr_dl mac;
218
219	pThis->u.s.hEvtDetached = NIL_RTSEMEVENT;
220	rc = RTSemEventCreate(&pThis->u.s.hEvtDetached);
221	if (RT_FAILURE(rc))
222	{
223	printf("vboxNetAdpOsCreate: failed to create semaphore (rc=%d).\n", rc);
224	return rc;
225	}
226
227	mac.sdl_len = sizeof(mac);
228	mac.sdl_family = AF_LINK;
229	mac.sdl_alen = ETHER_ADDR_LEN;
230	mac.sdl_nlen = 0;
231	mac.sdl_slen = 0;
232	memcpy(LLADDR(&mac), pMACAddress->au8, mac.sdl_alen);
233
234	RTStrPrintf(pThis->szName, VBOXNETADP_MAX_NAME_LEN, "%s%d", VBOXNETADP_NAME, pThis->iUnit);
235	vboxNetAdpDarwinComposeUUID(pThis, &uuid);
236	Params.uniqueid = uuid.au8;
237	Params.uniqueid_len = sizeof(uuid);
238	Params.name = VBOXNETADP_NAME;
239	Params.unit = pThis->iUnit;
240	Params.family = IFNET_FAMILY_ETHERNET;
241	Params.type = IFT_ETHER;
242	Params.output = vboxNetAdpDarwinOutput;
243	Params.demux = vboxNetAdpDarwinDemux;
244	Params.add_proto = vboxNetAdpDarwinAddProto;
245	Params.del_proto = vboxNetAdpDarwinDelProto;
246	Params.check_multi = ether_check_multi;
247	Params.framer = ether_frameout;
248	Params.softc = pThis;
249	Params.ioctl = (ifnet_ioctl_func)ether_ioctl;
250	Params.set_bpf_tap = NULL;
251	Params.detach = vboxNetAdpDarwinDetach;
252	Params.event = NULL;
253	Params.broadcast_addr = "\xFF\xFF\xFF\xFF\xFF\xFF";
254	Params.broadcast_len = ETHER_ADDR_LEN;
255
256	errno_t err = ifnet_allocate(&Params, &pThis->u.s.pIface);
257	if (!err)
258	{
259	err = ifnet_attach(pThis->u.s.pIface, &mac);
260	if (!err)
261	{
262	bpfattach(pThis->u.s.pIface, DLT_EN10MB, ETHER_HDR_LEN);
263
264	err = ifnet_set_flags(pThis->u.s.pIface, IFF_RUNNING \| IFF_BROADCAST \| IFF_SIMPLEX \| IFF_MULTICAST, 0xFFFF);
265	if (!err)
266	{
267	ifnet_set_mtu(pThis->u.s.pIface, VBOXNETADP_MTU);
268	VBoxNetSendDummy(pThis->u.s.pIface);
269	return VINF_SUCCESS;
270	}
271	else
272	Log(("vboxNetAdpDarwinRegisterDevice: Failed to set flags (err=%d).\n", err));
273	ifnet_detach(pThis->u.s.pIface);
274	}
275	else
276	Log(("vboxNetAdpDarwinRegisterDevice: Failed to attach to interface (err=%d).\n", err));
277	ifnet_release(pThis->u.s.pIface);
278	}
279	else
280	Log(("vboxNetAdpDarwinRegisterDevice: Failed to allocate interface (err=%d).\n", err));
281
282	RTSemEventDestroy(pThis->u.s.hEvtDetached);
283	pThis->u.s.hEvtDetached = NIL_RTSEMEVENT;
284
285	return RTErrConvertFromErrno(err);
286	}
287
288	void vboxNetAdpOsDestroy(PVBOXNETADP pThis)
289	{
290	u_int32_t i;
291	/* Bring down the interface */
292	int rc = VINF_SUCCESS;
293	errno_t err;
294
295	AssertPtr(pThis->u.s.pIface);
296	Assert(pThis->u.s.hEvtDetached != NIL_RTSEMEVENT);
297
298	err = ifnet_set_flags(pThis->u.s.pIface, 0, IFF_UP \| IFF_RUNNING);
299	if (err)
300	Log(("vboxNetAdpDarwinUnregisterDevice: Failed to bring down interface "
301	"(err=%d).\n", err));
302	/* Detach all protocols. */
303	for (i = 0; i < VBOXNETADP_MAX_FAMILIES; i++)
304	if (pThis->u.s.aAttachedFamilies[i])
305	ifnet_detach_protocol(pThis->u.s.pIface, pThis->u.s.aAttachedFamilies[i]);
306	err = ifnet_detach(pThis->u.s.pIface);
307	if (err)
308	Log(("vboxNetAdpDarwinUnregisterDevice: Failed to detach interface "
309	"(err=%d).\n", err));
310	Log2(("vboxNetAdpDarwinUnregisterDevice: Waiting for 'detached' event...\n"));
311	/* Wait until we get a signal from detach callback. */
312	rc = RTSemEventWait(pThis->u.s.hEvtDetached, VBOXNETADP_DETACH_TIMEOUT);
313	if (rc == VERR_TIMEOUT)
314	LogRel(("VBoxAdpDrv: Failed to detach interface %s%d\n.",
315	VBOXNETADP_NAME, pThis->iUnit));
316	err = ifnet_release(pThis->u.s.pIface);
317	if (err)
318	Log(("vboxNetAdpUnregisterDevice: Failed to release interface (err=%d).\n", err));
319
320	RTSemEventDestroy(pThis->u.s.hEvtDetached);
321	pThis->u.s.hEvtDetached = NIL_RTSEMEVENT;
322	}
323
324	/**
325	* Device open. Called on open /dev/vboxnetctl
326	*
327	* @param pInode Pointer to inode info structure.
328	* @param pFilp Associated file pointer.
329	*/
330	static int VBoxNetAdpDarwinOpen(dev_t Dev, int fFlags, int fDevType, struct proc *pProcess)
331	{
332	char szName[128];
333	szName[0] = '\0';
334	proc_name(proc_pid(pProcess), szName, sizeof(szName));
335	Log(("VBoxNetAdpDarwinOpen: pid=%d '%s'\n", proc_pid(pProcess), szName));
336	return 0;
337	}
338
339	/**
340	* Close device.
341	*/
342	static int VBoxNetAdpDarwinClose(dev_t Dev, int fFlags, int fDevType, struct proc *pProcess)
343	{
344	Log(("VBoxNetAdpDarwinClose: pid=%d\n", proc_pid(pProcess)));
345	return 0;
346	}
347
348	/**
349	* Device I/O Control entry point.
350	*
351	* @returns Darwin for slow IOCtls and VBox status code for the fast ones.
352	* @param Dev The device number (major+minor).
353	* @param iCmd The IOCtl command.
354	* @param pData Pointer to the data (if any it's a SUPDRVIOCTLDATA (kernel copy)).
355	* @param fFlags Flag saying we're a character device (like we didn't know already).
356	* @param pProcess The process issuing this request.
357	*/
358	static int VBoxNetAdpDarwinIOCtl(dev_t Dev, u_long iCmd, caddr_t pData, int fFlags, struct proc *pProcess)
359	{
360	uint32_t cbReq = IOCPARM_LEN(iCmd);
361	PVBOXNETADPREQ pReq = (PVBOXNETADPREQ)pData;
362	int rc;
363
364	Log(("VBoxNetAdpDarwinIOCtl: param len %#x; iCmd=%#lx\n", cbReq, iCmd));
365	switch (IOCBASECMD(iCmd))
366	{
367	case IOCBASECMD(VBOXNETADP_CTL_ADD):
368	{
369	if ( (IOC_DIRMASK & iCmd) != IOC_INOUT
370	\|\| cbReq < sizeof(VBOXNETADPREQ))
371	return EINVAL;
372
373	PVBOXNETADP pNew;
374	Log(("VBoxNetAdpDarwinIOCtl: szName=%s\n", pReq->szName));
375	rc = vboxNetAdpCreate(&pNew,
376	pReq->szName[0] && RTStrEnd(pReq->szName, RT_MIN(cbReq, sizeof(pReq->szName))) ?
377	pReq->szName : NULL);
378	if (RT_FAILURE(rc))
379	return rc == VERR_OUT_OF_RESOURCES ? ENOMEM : EINVAL;
380
381	Assert(strlen(pReq->szName) < sizeof(pReq->szName));
382	strncpy(pReq->szName, pNew->szName, sizeof(pReq->szName) - 1);
383	pReq->szName[sizeof(pReq->szName) - 1] = '\0';
384	Log(("VBoxNetAdpDarwinIOCtl: Added '%s'\n", pReq->szName));
385	break;
386	}
387
388	case IOCBASECMD(VBOXNETADP_CTL_REMOVE):
389	{
390	if (!RTStrEnd(pReq->szName, RT_MIN(cbReq, sizeof(pReq->szName))))
391	return EINVAL;
392
393	PVBOXNETADP pAdp = vboxNetAdpFindByName(pReq->szName);
394	if (!pAdp)
395	return EINVAL;
396
397	rc = vboxNetAdpDestroy(pAdp);
398	if (RT_FAILURE(rc))
399	return EINVAL;
400	Log(("VBoxNetAdpDarwinIOCtl: Removed %s\n", pReq->szName));
401	break;
402	}
403
404	default:
405	printf("VBoxNetAdpDarwinIOCtl: unknown command %lx.\n", IOCBASECMD(iCmd));
406	return EINVAL;
407	}
408
409	return 0;
410	}
411
412	int vboxNetAdpOsInit(PVBOXNETADP pThis)
413	{
414	/*
415	* Init the darwin specific members.
416	*/
417	pThis->u.s.pIface = NULL;
418	pThis->u.s.hEvtDetached = NIL_RTSEMEVENT;
419	memset(pThis->u.s.aAttachedFamilies, 0, sizeof(pThis->u.s.aAttachedFamilies));
420
421	return VINF_SUCCESS;
422	}
423
424	/**
425	* Start the kernel module.
426	*/
427	static kern_return_t VBoxNetAdpDarwinStart(struct kmod_info pKModInfo, void pvData)
428	{
429	int rc;
430
431	/*
432	* Initialize IPRT and find our module tag id.
433	* (IPRT is shared with VBoxDrv, it creates the loggers.)
434	*/
435	rc = RTR0Init(0);
436	if (RT_SUCCESS(rc))
437	{
438	Log(("VBoxNetAdpDarwinStart\n"));
439	rc = vboxNetAdpInit();
440	if (RT_SUCCESS(rc))
441	{
442	g_nCtlDev = cdevsw_add(-1, &g_ChDev);
443	if (g_nCtlDev < 0)
444	{
445	LogRel(("VBoxAdp: failed to register control device."));
446	rc = VERR_CANT_CREATE;
447	}
448	else
449	{
450	g_hCtlDev = devfs_make_node(makedev(g_nCtlDev, 0), DEVFS_CHAR,
451	UID_ROOT, GID_WHEEL, 0600, VBOXNETADP_CTL_DEV_NAME);
452	if (!g_hCtlDev)
453	{
454	LogRel(("VBoxAdp: failed to create FS node for control device."));
455	rc = VERR_CANT_CREATE;
456	}
457	}
458	}
459
460	if (RT_SUCCESS(rc))
461	{
462	LogRel(("VBoxAdpDrv: version " VBOX_VERSION_STRING " r%d\n", VBOX_SVN_REV));
463	return KMOD_RETURN_SUCCESS;
464	}
465
466	LogRel(("VBoxAdpDrv: failed to initialize device extension (rc=%d)\n", rc));
467	RTR0Term();
468	}
469	else
470	printf("VBoxAdpDrv: failed to initialize IPRT (rc=%d)\n", rc);
471
472	return KMOD_RETURN_FAILURE;
473	}
474
475
476	/**
477	* Stop the kernel module.
478	*/
479	static kern_return_t VBoxNetAdpDarwinStop(struct kmod_info pKModInfo, void pvData)
480	{
481	Log(("VBoxNetAdpDarwinStop\n"));
482
483	vboxNetAdpShutdown();
484	/* Remove control device */
485	devfs_remove(g_hCtlDev);
486	cdevsw_remove(g_nCtlDev, &g_ChDev);
487
488	RTR0Term();
489
490	return KMOD_RETURN_SUCCESS;
491	}

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source: vbox/trunk/src/VBox/HostDrivers/VBoxNetAdp/darwin/VBoxNetAdp-darwin.cpp@ 57907

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