VBoxNetFltInternal.h@ 51073

Last change on this file since 51073 was 46904, checked in by vboxsync, 12 years ago
IntNet, VirtioNet, NetFilter: Large frame support + drop oversized + UFO fix (#6821)
Property svn:eol-style set to `native` Property svn:keywords set to `Id`
File size: 16.9 KB

Line
1	/* $Id: VBoxNetFltInternal.h 46904 2013-07-02 12:59:56Z vboxsync $ */
2	/** @file
3	* VBoxNetFlt - Network Filter Driver (Host), Internal Header.
4	*/
5
6	/*
7	* Copyright (C) 2008-2012 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	#ifndef ___VBoxNetFltInternal_h___
19	#define ___VBoxNetFltInternal_h___
20
21	#include <VBox/sup.h>
22	#include <VBox/intnet.h>
23	#include <iprt/semaphore.h>
24	#include <iprt/assert.h>
25
26
27	RT_C_DECLS_BEGIN
28
29	/** Pointer to the globals. */
30	typedef struct VBOXNETFLTGLOBALS *PVBOXNETFLTGLOBALS;
31
32
33	/**
34	* The state of a filter driver instance.
35	*
36	* The state machine differs a bit between the platforms because of
37	* the way we hook into the stack. On some hosts we can dynamically
38	* attach when required (on CreateInstance) and on others we will
39	* have to connect when the network stack is bound up. These modes
40	* are called static and dynamic config and governed at compile time
41	* by the VBOXNETFLT_STATIC_CONFIG define.
42	*
43	* See sec_netflt_msc for more details on locking and synchronization.
44	*/
45	typedef enum VBOXNETFTLINSSTATE
46	{
47	/** The usual invalid state. */
48	kVBoxNetFltInsState_Invalid = 0,
49	/** Initialization.
50	* We've reserved the interface name but need to attach to the actual
51	* network interface outside the lock to avoid deadlocks.
52	* In the dynamic case this happens during a Create(Instance) call.
53	* In the static case it happens during driver initialization. */
54	kVBoxNetFltInsState_Initializing,
55	#ifdef VBOXNETFLT_STATIC_CONFIG
56	/** Unconnected, not hooked up to a switch (static only).
57	* The filter driver instance has been instantiated and hooked up,
58	* waiting to be connected to an internal network. */
59	kVBoxNetFltInsState_Unconnected,
60	#endif
61	/** Connected to an internal network. */
62	kVBoxNetFltInsState_Connected,
63	/** Disconnecting from the internal network and possibly the host network interface.
64	* Partly for reasons of deadlock avoidance again. */
65	kVBoxNetFltInsState_Disconnecting,
66	/** The instance has been disconnected from both the host and the internal network. */
67	kVBoxNetFltInsState_Destroyed,
68
69	/** The habitual 32-bit enum hack. */
70	kVBoxNetFltInsState_32BitHack = 0x7fffffff
71	} VBOXNETFTLINSSTATE;
72
73
74	/**
75	* The per-instance data of the VBox filter driver.
76	*
77	* This is data associated with a network interface / NIC / wossname which
78	* the filter driver has been or may be attached to. When possible it is
79	* attached dynamically, but this may not be possible on all OSes so we have
80	* to be flexible about things.
81	*
82	* A network interface / NIC / wossname can only have one filter driver
83	* instance attached to it. So, attempts at connecting an internal network
84	* to an interface that's already in use (connected to another internal network)
85	* will result in a VERR_SHARING_VIOLATION.
86	*
87	* Only one internal network can connect to a filter driver instance.
88	*/
89	typedef struct VBOXNETFLTINS
90	{
91	/** Pointer to the next interface in the list. (VBOXNETFLTGLOBAL::pInstanceHead) */
92	struct VBOXNETFLTINS *pNext;
93	/** Our RJ-45 port.
94	* This is what the internal network plugs into. */
95	INTNETTRUNKIFPORT MyPort;
96	/** The RJ-45 port on the INTNET "switch".
97	* This is what we're connected to. */
98	PINTNETTRUNKSWPORT pSwitchPort;
99	/** Pointer to the globals. */
100	PVBOXNETFLTGLOBALS pGlobals;
101
102	/** The spinlock protecting the state variables and host interface handle. */
103	RTSPINLOCK hSpinlock;
104	/** The current interface state. */
105	VBOXNETFTLINSSTATE volatile enmState;
106	/** The trunk state. */
107	INTNETTRUNKIFSTATE volatile enmTrunkState;
108	bool volatile fActive;
109	/** Disconnected from the host network interface. */
110	bool volatile fDisconnectedFromHost;
111	/** Rediscovery is pending.
112	* cBusy will never reach zero during rediscovery, so which
113	* takes care of serializing rediscovery and disconnecting. */
114	bool volatile fRediscoveryPending;
115	/** Whether we should not attempt to set promiscuous mode at all. */
116	bool fDisablePromiscuous;
117	#if (ARCH_BITS == 32) && defined(__GNUC__)
118	#if 0
119	uint32_t u32Padding; /*< Alignment padding, will assert in ASMAtomicUoWriteU64 otherwise. /
120	#endif
121	#endif
122	/** The timestamp of the last rediscovery. */
123	uint64_t volatile NanoTSLastRediscovery;
124	/** Reference count. */
125	uint32_t volatile cRefs;
126	/** The busy count.
127	* This counts the number of current callers and pending packet. */
128	uint32_t volatile cBusy;
129	/** The event that is signaled when we go idle and that pfnWaitForIdle blocks on. */
130	RTSEMEVENT hEventIdle;
131
132	/** @todo move MacAddr out of this structure! */
133	union
134	{
135	#ifdef VBOXNETFLT_OS_SPECFIC
136	struct
137	{
138	# if defined(RT_OS_DARWIN)
139	/** @name Darwin instance data.
140	* @{ */
141	/** Pointer to the darwin network interface we're attached to.
142	* This is treated as highly volatile and should only be read and retained
143	* while owning hSpinlock. Releasing references to this should not be done
144	* while owning it though as we might end up destroying it in some paths. */
145	ifnet_t volatile pIfNet;
146	/** The interface filter handle.
147	* Same access rules as with pIfNet. */
148	interface_filter_t volatile pIfFilter;
149	/** Whether we've need to set promiscuous mode when the interface comes up. */
150	bool volatile fNeedSetPromiscuous;
151	/** Whether we've successfully put the interface into to promiscuous mode.
152	* This is for dealing with the ENETDOWN case. */
153	bool volatile fSetPromiscuous;
154	/** The MAC address of the interface. */
155	RTMAC MacAddr;
156	/** @} */
157	# elif defined(RT_OS_LINUX)
158	/** @name Linux instance data
159	* @{ */
160	/** Pointer to the device. */
161	struct net_device * volatile pDev;
162	/** MTU of host's interface. */
163	uint32_t cbMtu;
164	/** Whether we've successfully put the interface into to promiscuous mode.
165	* This is for dealing with the ENETDOWN case. */
166	bool volatile fPromiscuousSet;
167	/** Whether device exists and physically attached. */
168	bool volatile fRegistered;
169	/** Whether our packet handler is installed. */
170	bool volatile fPacketHandler;
171	/** The MAC address of the interface. */
172	RTMAC MacAddr;
173	struct notifier_block Notifier;
174	struct packet_type PacketType;
175	# ifndef VBOXNETFLT_LINUX_NO_XMIT_QUEUE
176	struct sk_buff_head XmitQueue;
177	struct work_struct XmitTask;
178	# endif
179	/** @} */
180	# elif defined(RT_OS_SOLARIS)
181	/** @name Solaris instance data.
182	* @{ */
183	# ifdef VBOX_WITH_NETFLT_CROSSBOW
184	/** Whether the underlying interface is a VNIC or not. */
185	bool fIsVNIC;
186	/** Whether the underlying interface is a VNIC template or not. */
187	bool fIsVNICTemplate;
188	/** Handle to list of created VNICs. */
189	list_t hVNICs;
190	/** The MAC address of the host interface. */
191	RTMAC MacAddr;
192	/** Handle of this interface (lower MAC). */
193	mac_handle_t hInterface;
194	/** Handle to link state notifier. */
195	mac_notify_handle_t hNotify;
196	# else
197	/** Pointer to the bound IPv4 stream. */
198	struct vboxnetflt_stream_t * volatile pIp4Stream;
199	/** Pointer to the bound IPv6 stream. */
200	struct vboxnetflt_stream_t * volatile pIp6Stream;
201	/** Pointer to the bound ARP stream. */
202	struct vboxnetflt_stream_t * volatile pArpStream;
203	/** Pointer to the unbound promiscuous stream. */
204	struct vboxnetflt_promisc_stream_t * volatile pPromiscStream;
205	/** Whether we are attaching to IPv6 stream dynamically now. */
206	bool volatile fAttaching;
207	/** Whether this is a VLAN interface or not. */
208	bool volatile fVLAN;
209	/** Layered device handle to the interface. */
210	ldi_handle_t hIface;
211	/** The MAC address of the interface. */
212	RTMAC MacAddr;
213	/** Mutex protection used for loopback. */
214	kmutex_t hMtx;
215	/** Mutex protection used for dynamic IPv6 attaches. */
216	RTSEMFASTMUTEX hPollMtx;
217	# endif
218	/** @} */
219	# elif defined(RT_OS_FREEBSD)
220	/** @name FreeBSD instance data.
221	* @{ */
222	/** Interface handle */
223	struct ifnet *ifp;
224	/** Netgraph node handle */
225	node_p node;
226	/** Input hook */
227	hook_p input;
228	/** Output hook */
229	hook_p output;
230	/** Original interface flags */
231	unsigned int flags;
232	/** Input queue */
233	struct ifqueue inq;
234	/** Output queue */
235	struct ifqueue outq;
236	/** Input task */
237	struct task tskin;
238	/** Output task */
239	struct task tskout;
240	/** The MAC address of the interface. */
241	RTMAC MacAddr;
242	/** @} */
243	# elif defined(RT_OS_WINDOWS)
244	/** @name Windows instance data.
245	* @{ */
246	/** Filter driver device context. */
247	VBOXNETFLTWIN WinIf;
248
249	volatile uint32_t cModeNetFltRefs;
250	volatile uint32_t cModePassThruRefs;
251	#ifndef VBOXNETFLT_NO_PACKET_QUEUE
252	/** Packet worker thread info */
253	PACKET_QUEUE_WORKER PacketQueueWorker;
254	#endif
255	/** The MAC address of the interface. Caching MAC for performance reasons. */
256	RTMAC MacAddr;
257	/** mutex used to synchronize WinIf init/deinit */
258	RTSEMMUTEX hWinIfMutex;
259	/** @} */
260	# else
261	# error "PORTME"
262	# endif
263	} s;
264	#endif
265	/** Padding. */
266	#if defined(RT_OS_WINDOWS)
267	# if defined(VBOX_NETFLT_ONDEMAND_BIND)
268	uint8_t abPadding[192];
269	# elif defined(VBOXNETADP)
270	uint8_t abPadding[256];
271	# else
272	uint8_t abPadding[1024];
273	# endif
274	#elif defined(RT_OS_LINUX)
275	uint8_t abPadding[320];
276	#elif defined(RT_OS_FREEBSD)
277	uint8_t abPadding[320];
278	#else
279	uint8_t abPadding[128];
280	#endif
281	} u;
282
283	/** The interface name. */
284	char szName[1];
285	} VBOXNETFLTINS;
286	/** Pointer to the instance data of a host network filter driver. */
287	typedef struct VBOXNETFLTINS *PVBOXNETFLTINS;
288
289	AssertCompileMemberAlignment(VBOXNETFLTINS, NanoTSLastRediscovery, 8);
290	#ifdef VBOXNETFLT_OS_SPECFIC
291	AssertCompile(RT_SIZEOFMEMB(VBOXNETFLTINS, u.s) <= RT_SIZEOFMEMB(VBOXNETFLTINS, u.abPadding));
292	#endif
293
294
295	/**
296	* The global data of the VBox filter driver.
297	*
298	* This contains the bit required for communicating with support driver, VBoxDrv
299	* (start out as SupDrv).
300	*/
301	typedef struct VBOXNETFLTGLOBALS
302	{
303	/** Mutex protecting the list of instances and state changes. */
304	RTSEMFASTMUTEX hFastMtx;
305	/** Pointer to a list of instance data. */
306	PVBOXNETFLTINS pInstanceHead;
307
308	/** The INTNET trunk network interface factory. */
309	INTNETTRUNKFACTORY TrunkFactory;
310	/** The SUPDRV component factory registration. */
311	SUPDRVFACTORY SupDrvFactory;
312	/** The number of current factory references. */
313	int32_t volatile cFactoryRefs;
314	/** Whether the IDC connection is open or not.
315	* This is only for cleaning up correctly after the separate IDC init on Windows. */
316	bool fIDCOpen;
317	/** The SUPDRV IDC handle (opaque struct). */
318	SUPDRVIDCHANDLE SupDrvIDC;
319	} VBOXNETFLTGLOBALS;
320
321
322	DECLHIDDEN(int) vboxNetFltInitGlobalsAndIdc(PVBOXNETFLTGLOBALS pGlobals);
323	DECLHIDDEN(int) vboxNetFltInitGlobals(PVBOXNETFLTGLOBALS pGlobals);
324	DECLHIDDEN(int) vboxNetFltInitIdc(PVBOXNETFLTGLOBALS pGlobals);
325	DECLHIDDEN(int) vboxNetFltTryDeleteIdcAndGlobals(PVBOXNETFLTGLOBALS pGlobals);
326	DECLHIDDEN(void) vboxNetFltDeleteGlobals(PVBOXNETFLTGLOBALS pGlobals);
327	DECLHIDDEN(int) vboxNetFltTryDeleteIdc(PVBOXNETFLTGLOBALS pGlobals);
328
329	DECLHIDDEN(bool) vboxNetFltCanUnload(PVBOXNETFLTGLOBALS pGlobals);
330	DECLHIDDEN(PVBOXNETFLTINS) vboxNetFltFindInstance(PVBOXNETFLTGLOBALS pGlobals, const char *pszName);
331
332	DECLHIDDEN(void) vboxNetFltRetain(PVBOXNETFLTINS pThis, bool fBusy);
333	DECLHIDDEN(bool) vboxNetFltTryRetainBusyActive(PVBOXNETFLTINS pThis);
334	DECLHIDDEN(bool) vboxNetFltTryRetainBusyNotDisconnected(PVBOXNETFLTINS pThis);
335	DECLHIDDEN(void) vboxNetFltRelease(PVBOXNETFLTINS pThis, bool fBusy);
336
337	#ifdef VBOXNETFLT_STATIC_CONFIG
338	DECLHIDDEN(int) vboxNetFltSearchCreateInstance(PVBOXNETFLTGLOBALS pGlobals, const char pszName, PVBOXNETFLTINS ppInstance, void * pContext);
339	#endif
340
341
342
343	/** @name The OS specific interface.
344	* @{ */
345	/**
346	* Try rediscover the host interface.
347	*
348	* This is called periodically from the transmit path if we're marked as
349	* disconnected from the host. There is no chance of a race here.
350	*
351	* @returns true if the interface was successfully rediscovered and reattach,
352	* otherwise false.
353	* @param pThis The new instance.
354	*/
355	DECLHIDDEN(bool) vboxNetFltOsMaybeRediscovered(PVBOXNETFLTINS pThis);
356
357	/**
358	* Transmits a frame.
359	*
360	* @return IPRT status code.
361	* @param pThis The new instance.
362	* @param pvIfData Pointer to the host-private interface data.
363	* @param pSG The (scatter/)gather list.
364	* @param fDst The destination mask. At least one bit will be set.
365	*
366	* @remarks Owns the out-bound trunk port semaphore.
367	*/
368	DECLHIDDEN(int) vboxNetFltPortOsXmit(PVBOXNETFLTINS pThis, void *pvIfData, PINTNETSG pSG, uint32_t fDst);
369
370	/**
371	* This is called when activating or suspending the instance.
372	*
373	* Use this method to enable and disable promiscuous mode on
374	* the interface to prevent unnecessary interrupt load.
375	*
376	* It is only called when the state changes.
377	*
378	* @param pThis The instance.
379	*
380	* @remarks Owns the lock for the out-bound trunk port.
381	*/
382	DECLHIDDEN(void) vboxNetFltPortOsSetActive(PVBOXNETFLTINS pThis, bool fActive);
383
384	/**
385	* This is called when a network interface has obtained a new MAC address.
386	*
387	* @param pThis The instance.
388	* @param pvIfData Pointer to the private interface data.
389	* @param pMac Pointer to the new MAC address.
390	*/
391	DECLHIDDEN(void) vboxNetFltPortOsNotifyMacAddress(PVBOXNETFLTINS pThis, void *pvIfData, PCRTMAC pMac);
392
393	/**
394	* This is called when an interface is connected to the network.
395	*
396	* @return IPRT status code.
397	* @param pThis The instance.
398	* @param pvIf Pointer to the interface.
399	* @param ppvIfData Where to store the private interface data.
400	*/
401	DECLHIDDEN(int) vboxNetFltPortOsConnectInterface(PVBOXNETFLTINS pThis, void pvIf, void *ppvIfData);
402
403	/**
404	* This is called when a VM host disconnects from the network.
405	*
406	* @param pThis The instance.
407	* @param pvIfData Pointer to the private interface data.
408	*/
409	DECLHIDDEN(int) vboxNetFltPortOsDisconnectInterface(PVBOXNETFLTINS pThis, void *pvIfData);
410
411	/**
412	* This is called to when disconnecting from a network.
413	*
414	* @return IPRT status code.
415	* @param pThis The new instance.
416	*
417	* @remarks May own the semaphores for the global list, the network lock and the out-bound trunk port.
418	*/
419	DECLHIDDEN(int) vboxNetFltOsDisconnectIt(PVBOXNETFLTINS pThis);
420
421	/**
422	* This is called to when connecting to a network.
423	*
424	* @return IPRT status code.
425	* @param pThis The new instance.
426	*
427	* @remarks Owns the semaphores for the global list, the network lock and the out-bound trunk port.
428	*/
429	DECLHIDDEN(int) vboxNetFltOsConnectIt(PVBOXNETFLTINS pThis);
430
431	/**
432	* Counter part to vboxNetFltOsInitInstance().
433	*
434	* @return IPRT status code.
435	* @param pThis The new instance.
436	*
437	* @remarks May own the semaphores for the global list, the network lock and the out-bound trunk port.
438	*/
439	DECLHIDDEN(void) vboxNetFltOsDeleteInstance(PVBOXNETFLTINS pThis);
440
441	/**
442	* This is called to attach to the actual host interface
443	* after linking the instance into the list.
444	*
445	* The MAC address as well promiscuousness and GSO capabilities should be
446	* reported by this function.
447	*
448	* @return IPRT status code.
449	* @param pThis The new instance.
450	* @param pvContext The user supplied context in the static config only.
451	* NULL in the dynamic config.
452	*
453	* @remarks Owns no locks.
454	*/
455	DECLHIDDEN(int) vboxNetFltOsInitInstance(PVBOXNETFLTINS pThis, void *pvContext);
456
457	/**
458	* This is called to perform structure initializations.
459	*
460	* @return IPRT status code.
461	* @param pThis The new instance.
462	*
463	* @remarks Owns no locks.
464	*/
465	DECLHIDDEN(int) vboxNetFltOsPreInitInstance(PVBOXNETFLTINS pThis);
466	/** @} */
467
468
469	RT_C_DECLS_END
470
471	#endif
472

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source: vbox/trunk/src/VBox/HostDrivers/VBoxNetFlt/VBoxNetFltInternal.h@ 51073

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