DrvNAT.cpp@ 22451

最後變更在這個檔案從22451是 22449,由 vboxsync 提交於 16 年前
NAT: re-counters
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1	/* $Id: DrvNAT.cpp 22449 2009-08-26 05:37:36Z vboxsync $ */
2	/** @file
3	* DrvNAT - NAT network transport driver.
4	*/
5
6	/*
7	* Copyright (C) 2006-2009 Sun Microsystems, Inc.
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.alldomusa.eu.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	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
18	* Clara, CA 95054 USA or visit http://www.sun.com if you need
19	* additional information or have any questions.
20	*/
21
22
23	/*******************************************************************************
24	* Header Files *
25	*******************************************************************************/
26	#define LOG_GROUP LOG_GROUP_DRV_NAT
27	#define __STDC_LIMIT_MACROS
28	#define __STDC_CONSTANT_MACROS
29	#include "slirp/libslirp.h"
30	#include "slirp/ctl.h"
31	#include <VBox/pdmdrv.h>
32	#include <iprt/assert.h>
33	#include <iprt/file.h>
34	#include <iprt/mem.h>
35	#include <iprt/string.h>
36	#include <iprt/critsect.h>
37	#include <iprt/cidr.h>
38	#include <iprt/stream.h>
39
40	#include "Builtins.h"
41
42	#ifndef RT_OS_WINDOWS
43	# include <unistd.h>
44	# include <fcntl.h>
45	# include <poll.h>
46	# include <errno.h>
47	#endif
48	#ifdef RT_OS_FREEBSD
49	# include <netinet/in.h>
50	#endif
51	#include <iprt/semaphore.h>
52	#include <iprt/req.h>
53
54	#define COUNTERS_INIT
55	#include "counters.h"
56
57	/*******************************************************************************
58	* Defined Constants And Macros *
59	*******************************************************************************/
60	/**
61	* @todo: This is a bad hack to prevent freezing the guest during high network
62	* activity. This needs to be fixed properly.
63	*/
64	#define VBOX_NAT_DELAY_HACK
65	#define SLIRP_SPLIT_CAN_OUTPUT 1
66
67	#define GET_EXTRADATA(pthis, node, name, rc, type, type_name, var) \
68	do { \
69	(rc) = CFGMR3Query ## type((node), name, &(var)); \
70	if (RT_FAILURE((rc)) && (rc) != VERR_CFGM_VALUE_NOT_FOUND) \
71	return PDMDrvHlpVMSetError((pthis)->pDrvIns, (rc), RT_SRC_POS, N_("NAT#%d: configuration query for \""name"\" " #type_name " failed"), \
72	(pthis)->pDrvIns->iInstance); \
73	}while(0)
74
75	#define GET_ED_STRICT(pthis, node, name, rc, type, type_name, var) \
76	do { \
77	(rc) = CFGMR3Query ## type((node), name, &(var)); \
78	if (RT_FAILURE((rc))) \
79	return PDMDrvHlpVMSetError((pthis)->pDrvIns, (rc), RT_SRC_POS, N_("NAT#%d: configuration query for \""name"\" " #type_name " failed"), \
80	(pthis)->pDrvIns->iInstance); \
81	}while(0)
82
83	#define GET_EXTRADATA_N(pthis, node, name, rc, type, type_name, var, var_size) \
84	do { \
85	(rc) = CFGMR3Query ## type((node), name, &(var), var_size); \
86	if (RT_FAILURE((rc)) && (rc) != VERR_CFGM_VALUE_NOT_FOUND) \
87	return PDMDrvHlpVMSetError((pthis)->pDrvIns, (rc), RT_SRC_POS, N_("NAT#%d: configuration query for \""name"\" " #type_name " failed"), \
88	(pthis)->pDrvIns->iInstance); \
89	}while(0)
90
91	#define GET_BOOL(rc, pthis, node, name, var) \
92	GET_EXTRADATA(pthis, node, name, (rc), Bool, bolean, (var))
93	#define GET_STRING(rc, pthis, node, name, var, var_size) \
94	GET_EXTRADATA_N(pthis, node, name, (rc), String, string, (var), (var_size))
95	#define GET_STRING_ALLOC(rc, pthis, node, name, var) \
96	GET_EXTRADATA(pthis, node, name, (rc), StringAlloc, string, (var))
97	#define GET_S32(rc, pthis, node, name, var) \
98	GET_EXTRADATA(pthis, node, name, (rc), S32, int, (var))
99	#define GET_S32_STRICT(rc, pthis, node, name, var) \
100	GET_ED_STRICT(pthis, node, name, (rc), S32, int, (var))
101
102
103
104	#define DOGETIP(rc, node, instance, status, x) \
105	do { \
106	char sz##x[32]; \
107	GET_STRING((rc), (node), (instance), #x, sz ## x[0], sizeof(sz ## x)); \
108	if (rc != VERR_CFGM_VALUE_NOT_FOUND) \
109	(status) = inet_aton(sz ## x, &x); \
110	}while(0)
111
112	#define GETIP_DEF(rc, node, instance, x, def) \
113	do \
114	{ \
115	int status = 0; \
116	DOGETIP((rc), (node), (instance), status, x); \
117	if (status == 0 \|\| rc == VERR_CFGM_VALUE_NOT_FOUND) \
118	x.s_addr = def; \
119	}while(0)
120
121	#define QUEUE_SIZE 50
122
123	/*******************************************************************************
124	* Structures and Typedefs *
125	*******************************************************************************/
126	/**
127	* NAT network transport driver instance data.
128	*/
129	typedef struct DRVNAT
130	{
131	/** The network interface. */
132	PDMINETWORKCONNECTOR INetworkConnector;
133	/** The port we're attached to. */
134	PPDMINETWORKPORT pPort;
135	/** The network config of the port we're attached to. */
136	PPDMINETWORKCONFIG pConfig;
137	/** Pointer to the driver instance. */
138	PPDMDRVINS pDrvIns;
139	/** Link state */
140	PDMNETWORKLINKSTATE enmLinkState;
141	/** NAT state for this instance. */
142	PNATState pNATState;
143	/** TFTP directory prefix. */
144	char *pszTFTPPrefix;
145	/** Boot file name to provide in the DHCP server response. */
146	char *pszBootFile;
147	/** tftp server name to provide in the DHCP server response. */
148	char *pszNextServer;
149	/* polling thread */
150	PPDMTHREAD pSlirpThread;
151	/** Queue for NAT-thread-external events. */
152	PRTREQQUEUE pSlirpReqQueue;
153	#ifndef SLIRP_SPLIT_CAN_OUTPUT
154	/* Receive PDM queue (deliver packets to the guest) */
155	PPDMQUEUE pRecvQueue;
156	#endif
157
158	#ifdef VBOX_WITH_SLIRP_MT
159	PPDMTHREAD pGuestThread;
160	#endif
161	#ifndef RT_OS_WINDOWS
162	/** The write end of the control pipe. */
163	RTFILE PipeWrite;
164	/** The read end of the control pipe. */
165	RTFILE PipeRead;
166	#else
167	/** for external notification */
168	HANDLE hWakeupEvent;
169	#endif
170
171	#define DRV_PROFILE_COUNTER(name, dsc) STAMPROFILE Stat ## name
172	#define DRV_COUNTING_COUNTER(name, dsc) STAMCOUNTER Stat ## name
173	#include "counters.h"
174	#ifdef SLIRP_SPLIT_CAN_OUTPUT
175	/** thread delivering packets for receiving by the guest */
176	PPDMTHREAD pRecvThread;
177	/** event to wakeup the guest receive thread */
178	RTSEMEVENT EventRecv;
179	/** Receive Req queue (deliver packets to the guest) */
180	PRTREQQUEUE pRecvReqQueue;
181	#endif
182	} DRVNAT;
183	/** Pointer the NAT driver instance data. */
184	typedef DRVNAT *PDRVNAT;
185
186	/**
187	* NAT queue item.
188	*/
189	typedef struct DRVNATQUEUITEM
190	{
191	/** The core part owned by the queue manager. */
192	PDMQUEUEITEMCORE Core;
193	/** The buffer for output to guest. */
194	const uint8_t *pu8Buf;
195	/* size of buffer */
196	size_t cb;
197	void *mbuf;
198	} DRVNATQUEUITEM;
199	/** Pointer to a NAT queue item. */
200	typedef DRVNATQUEUITEM *PDRVNATQUEUITEM;
201
202
203	static void drvNATNotifyNATThread(PDRVNAT pThis);
204
205
206	/** Converts a pointer to NAT::INetworkConnector to a PRDVNAT. */
207	#define PDMINETWORKCONNECTOR_2_DRVNAT(pInterface) ( (PDRVNAT)((uintptr_t)pInterface - RT_OFFSETOF(DRVNAT, INetworkConnector)) )
208
209
210	#ifdef SLIRP_SPLIT_CAN_OUTPUT
211	static DECLCALLBACK(int) drvNATRecv(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
212	{
213	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
214
215	if (pThread->enmState == PDMTHREADSTATE_INITIALIZING)
216	return VINF_SUCCESS;
217
218	while (pThread->enmState == PDMTHREADSTATE_RUNNING)
219	{
220	RTReqProcess(pThis->pRecvReqQueue, 0);
221	RTSemEventWait(pThis->EventRecv, RT_INDEFINITE_WAIT);
222	}
223	return VINF_SUCCESS;
224	}
225
226
227	static DECLCALLBACK(int) drvNATRecvWakeup(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
228	{
229	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
230	int rc = RTSemEventSignal(pThis->EventRecv);
231
232	STAM_COUNTER_INC(&pThis->StatNATRecvWakeups);
233	AssertReleaseRC(rc);
234	return VINF_SUCCESS;
235	}
236
237	static DECLCALLBACK(void) drvNATRecvWorker(PDRVNAT pThis, uint8_t *pu8Buf, int cb)
238	{
239	STAM_PROFILE_START(&pThis->StatNATRecv, a);
240	if (RT_FAILURE(pThis->pPort->pfnWaitReceiveAvail(pThis->pPort, RT_INDEFINITE_WAIT)))
241	{
242	AssertMsgFailed(("NAT: No RX available even on indefinite wait"));
243	}
244	STAM_PROFILE_STOP(&pThis->StatNATRecvWait, a);
245	int rc = pThis->pPort->pfnReceive(pThis->pPort, pu8Buf, cb);
246	RTMemFree(pu8Buf);
247	STAM_PROFILE_STOP(&pThis->StatNATRecv, a);
248	AssertRC(rc);
249	}
250	#endif
251
252	/**
253	* Worker function for drvNATSend().
254	* @thread "NAT" thread.
255	*/
256	static void drvNATSendWorker(PDRVNAT pThis, const void *pvBuf, size_t cb)
257	{
258	Assert(pThis->enmLinkState == PDMNETWORKLINKSTATE_UP);
259	if (pThis->enmLinkState == PDMNETWORKLINKSTATE_UP)
260	slirp_input(pThis->pNATState, (uint8_t *)pvBuf, cb);
261	}
262
263
264	/**
265	* Called by the guest to send data to the network.
266	*
267	* @returns VBox status code.
268	* @param pInterface Pointer to the interface structure containing the called function pointer.
269	* @param pvBuf Data to send.
270	* @param cb Number of bytes to send.
271	* @thread EMT
272	*/
273	static DECLCALLBACK(int) drvNATSend(PPDMINETWORKCONNECTOR pInterface, const void *pvBuf, size_t cb)
274	{
275	PDRVNAT pThis = PDMINETWORKCONNECTOR_2_DRVNAT(pInterface);
276
277	LogFlow(("drvNATSend: pvBuf=%p cb=%#x\n", pvBuf, cb));
278	Log2(("drvNATSend: pvBuf=%p cb=%#x\n%.*Rhxd\n", pvBuf, cb, cb, pvBuf));
279
280	PRTREQ pReq = NULL;
281	int rc;
282	void *buf;
283
284	/* don't queue new requests when the NAT thread is about to stop */
285	if (pThis->pSlirpThread->enmState != PDMTHREADSTATE_RUNNING)
286	return VINF_SUCCESS;
287
288	#ifndef VBOX_WITH_SLIRP_MT
289	rc = RTReqAlloc(pThis->pSlirpReqQueue, &pReq, RTREQTYPE_INTERNAL);
290	#else
291	rc = RTReqAlloc((PRTREQQUEUE)slirp_get_queue(pThis->pNATState), &pReq, RTREQTYPE_INTERNAL);
292	#endif
293	AssertReleaseRC(rc);
294
295	/* @todo: Here we should get mbuf instead temporal buffer */
296	buf = RTMemAlloc(cb);
297	if (buf == NULL)
298	{
299	LogRel(("NAT: Can't allocate send buffer\n"));
300	return VERR_NO_MEMORY;
301	}
302	memcpy(buf, pvBuf, cb);
303
304	pReq->u.Internal.pfn = (PFNRT)drvNATSendWorker;
305	pReq->u.Internal.cArgs = 3;
306	pReq->u.Internal.aArgs[0] = (uintptr_t)pThis;
307	pReq->u.Internal.aArgs[1] = (uintptr_t)buf;
308	pReq->u.Internal.aArgs[2] = (uintptr_t)cb;
309	pReq->fFlags = RTREQFLAGS_VOID\|RTREQFLAGS_NO_WAIT;
310
311	rc = RTReqQueue(pReq, 0); /* don't wait, we have to wakeup the NAT thread fist */
312	AssertReleaseRC(rc);
313	drvNATNotifyNATThread(pThis);
314	LogFlow(("drvNATSend: end\n"));
315	return VINF_SUCCESS;
316	}
317
318
319	/**
320	* Get the NAT thread out of poll/WSAWaitForMultipleEvents
321	*/
322	static void drvNATNotifyNATThread(PDRVNAT pThis)
323	{
324	int rc;
325	#ifndef RT_OS_WINDOWS
326	/* kick select() */
327	rc = RTFileWrite(pThis->PipeWrite, "", 1, NULL);
328	#else
329	/* kick WSAWaitForMultipleEvents */
330	rc = WSASetEvent(pThis->hWakeupEvent);
331	#endif
332	AssertReleaseRC(rc);
333	}
334
335
336	/**
337	* Set promiscuous mode.
338	*
339	* This is called when the promiscuous mode is set. This means that there doesn't have
340	* to be a mode change when it's called.
341	*
342	* @param pInterface Pointer to the interface structure containing the called function pointer.
343	* @param fPromiscuous Set if the adaptor is now in promiscuous mode. Clear if it is not.
344	* @thread EMT
345	*/
346	static DECLCALLBACK(void) drvNATSetPromiscuousMode(PPDMINETWORKCONNECTOR pInterface, bool fPromiscuous)
347	{
348	LogFlow(("drvNATSetPromiscuousMode: fPromiscuous=%d\n", fPromiscuous));
349	/* nothing to do */
350	}
351
352	/**
353	* Worker function for drvNATNotifyLinkChanged().
354	* @thread "NAT" thread.
355	*/
356	static void drvNATNotifyLinkChangedWorker(PDRVNAT pThis, PDMNETWORKLINKSTATE enmLinkState)
357	{
358	pThis->enmLinkState = enmLinkState;
359
360	switch (enmLinkState)
361	{
362	case PDMNETWORKLINKSTATE_UP:
363	LogRel(("NAT: link up\n"));
364	slirp_link_up(pThis->pNATState);
365	break;
366
367	case PDMNETWORKLINKSTATE_DOWN:
368	case PDMNETWORKLINKSTATE_DOWN_RESUME:
369	LogRel(("NAT: link down\n"));
370	slirp_link_down(pThis->pNATState);
371	break;
372
373	default:
374	AssertMsgFailed(("drvNATNotifyLinkChanged: unexpected link state %d\n", enmLinkState));
375	}
376	}
377
378
379	/**
380	* Notification on link status changes.
381	*
382	* @param pInterface Pointer to the interface structure containing the called function pointer.
383	* @param enmLinkState The new link state.
384	* @thread EMT
385	*/
386	static DECLCALLBACK(void) drvNATNotifyLinkChanged(PPDMINETWORKCONNECTOR pInterface, PDMNETWORKLINKSTATE enmLinkState)
387	{
388	PDRVNAT pThis = PDMINETWORKCONNECTOR_2_DRVNAT(pInterface);
389
390	LogFlow(("drvNATNotifyLinkChanged: enmLinkState=%d\n", enmLinkState));
391
392	PRTREQ pReq = NULL;
393
394	/* don't queue new requests when the NAT thread is about to stop */
395	if (pThis->pSlirpThread->enmState != PDMTHREADSTATE_RUNNING)
396	return;
397
398	int rc = RTReqAlloc(pThis->pSlirpReqQueue, &pReq, RTREQTYPE_INTERNAL);
399	AssertReleaseRC(rc);
400	pReq->u.Internal.pfn = (PFNRT)drvNATNotifyLinkChangedWorker;
401	pReq->u.Internal.cArgs = 2;
402	pReq->u.Internal.aArgs[0] = (uintptr_t)pThis;
403	pReq->u.Internal.aArgs[1] = (uintptr_t)enmLinkState;
404	pReq->fFlags = RTREQFLAGS_VOID;
405	rc = RTReqQueue(pReq, 0); /* don't wait, we have to wakeup the NAT thread fist */
406	if (RT_LIKELY(rc == VERR_TIMEOUT))
407	{
408	drvNATNotifyNATThread(pThis);
409	rc = RTReqWait(pReq, RT_INDEFINITE_WAIT);
410	AssertReleaseRC(rc);
411	}
412	else
413	AssertReleaseRC(rc);
414	RTReqFree(pReq);
415	}
416
417	/**
418	* NAT thread handling the slirp stuff. The slirp implementation is single-threaded
419	* so we execute this enginre in a dedicated thread. We take care that this thread
420	* does not become the bottleneck: If the guest wants to send, a request is enqueued
421	* into the pSlirpReqQueue and handled asynchronously by this thread. If this thread
422	* wants to deliver packets to the guest, it enqueues a request into pRecvReqQueue
423	* which is later handled by the Recv thread.
424	*/
425	static DECLCALLBACK(int) drvNATAsyncIoThread(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
426	{
427	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
428	int nFDs = -1;
429	unsigned int ms;
430	#ifdef RT_OS_WINDOWS
431	DWORD event;
432	HANDLE *phEvents;
433	unsigned int cBreak = 0;
434	#else /* RT_OS_WINDOWS */
435	struct pollfd *polls = NULL;
436	unsigned int cPollNegRet = 0;
437	#endif /* !RT_OS_WINDOWS */
438
439	LogFlow(("drvNATAsyncIoThread: pThis=%p\n", pThis));
440
441	if (pThread->enmState == PDMTHREADSTATE_INITIALIZING)
442	return VINF_SUCCESS;
443
444	#ifdef RT_OS_WINDOWS
445	phEvents = slirp_get_events(pThis->pNATState);
446	#endif /* RT_OS_WINDOWS */
447
448	/*
449	* Polling loop.
450	*/
451	while (pThread->enmState == PDMTHREADSTATE_RUNNING)
452	{
453	nFDs = -1;
454	/*
455	* To prevent concurent execution of sending/receving threads
456	*/
457	#ifndef RT_OS_WINDOWS
458	nFDs = slirp_get_nsock(pThis->pNATState);
459	polls = NULL;
460	/* allocation for all sockets + Management pipe */
461	polls = (struct pollfd )RTMemAlloc((1 + nFDs) sizeof(struct pollfd) + sizeof(uint32_t));
462	if (polls == NULL)
463	return VERR_NO_MEMORY;
464
465	/* don't pass the managemant pipe */
466	slirp_select_fill(pThis->pNATState, &nFDs, &polls[1]);
467	ms = slirp_get_timeout_ms(pThis->pNATState);
468
469	polls[0].fd = pThis->PipeRead;
470	/* POLLRDBAND usually doesn't used on Linux but seems used on Solaris */
471	polls[0].events = POLLRDNORM\|POLLPRI\|POLLRDBAND;
472	polls[0].revents = 0;
473
474	int cChangedFDs = poll(polls, nFDs + 1, ms ? ms : -1);
475	if (cChangedFDs < 0)
476	{
477	if (errno == EINTR)
478	{
479	Log2(("NAT: signal was caught while sleep on poll\n"));
480	/* No error, just process all outstanding requests but don't wait */
481	cChangedFDs = 0;
482	}
483	else if (cPollNegRet++ > 128)
484	{
485	LogRel(("NAT:Poll returns (%s) suppressed %d\n", strerror(errno), cPollNegRet));
486	cPollNegRet = 0;
487	}
488	}
489
490	if (cChangedFDs >= 0)
491	{
492	slirp_select_poll(pThis->pNATState, &polls[1], nFDs);
493	if (polls[0].revents & (POLLRDNORM\|POLLPRI\|POLLRDBAND))
494	{
495	/* drain the pipe */
496	char ch[1];
497	size_t cbRead;
498	int counter = 0;
499	/*
500	* drvNATSend decoupled so we don't know how many times
501	* device's thread sends before we've entered multiplex,
502	* so to avoid false alarm drain pipe here to the very end
503	*
504	* @todo: Probably we should counter drvNATSend to count how
505	* deep pipe has been filed before drain.
506	*
507	* XXX:Make it reading exactly we need to drain the pipe.
508	*/
509	RTFileRead(pThis->PipeRead, &ch, 1, &cbRead);
510	}
511	}
512	/* process _all_ outstanding requests but don't wait */
513	RTReqProcess(pThis->pSlirpReqQueue, 0);
514	RTMemFree(polls);
515	#else /* RT_OS_WINDOWS */
516	slirp_select_fill(pThis->pNATState, &nFDs);
517	ms = slirp_get_timeout_ms(pThis->pNATState);
518	struct timeval tv = { 0, ms*1000 };
519	event = WSAWaitForMultipleEvents(nFDs, phEvents, FALSE, ms ? ms : WSA_INFINITE, FALSE);
520	if ( (event < WSA_WAIT_EVENT_0 \|\| event > WSA_WAIT_EVENT_0 + nFDs - 1)
521	&& event != WSA_WAIT_TIMEOUT)
522	{
523	int error = WSAGetLastError();
524	LogRel(("NAT: WSAWaitForMultipleEvents returned %d (error %d)\n", event, error));
525	RTAssertReleasePanic();
526	}
527
528	if (event == WSA_WAIT_TIMEOUT)
529	{
530	/* only check for slow/fast timers */
531	slirp_select_poll(pThis->pNATState, /* fTimeout=/true, /fIcmp=*/false);
532	continue;
533	}
534	/* poll the sockets in any case */
535	Log2(("%s: poll\n", __FUNCTION__));
536	slirp_select_poll(pThis->pNATState, /* fTimeout=/false, / fIcmp=*/(event == WSA_WAIT_EVENT_0));
537	/* process _all_ outstanding requests but don't wait */
538	RTReqProcess(pThis->pSlirpReqQueue, 0);
539	# ifdef VBOX_NAT_DELAY_HACK
540	if (cBreak++ > 128)
541	{
542	cBreak = 0;
543	RTThreadSleep(2);
544	}
545	# endif
546	#endif /* RT_OS_WINDOWS */
547	}
548
549	return VINF_SUCCESS;
550	}
551
552
553	/**
554	* Unblock the send thread so it can respond to a state change.
555	*
556	* @returns VBox status code.
557	* @param pDevIns The pcnet device instance.
558	* @param pThread The send thread.
559	*/
560	static DECLCALLBACK(int) drvNATAsyncIoWakeup(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
561	{
562	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
563
564	drvNATNotifyNATThread(pThis);
565	return VINF_SUCCESS;
566	}
567
568	#ifdef VBOX_WITH_SLIRP_MT
569
570	static DECLCALLBACK(int) drvNATAsyncIoGuest(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
571	{
572	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
573
574	if (pThread->enmState == PDMTHREADSTATE_INITIALIZING)
575	return VINF_SUCCESS;
576
577	while (pThread->enmState == PDMTHREADSTATE_RUNNING)
578	slirp_process_queue(pThis->pNATState);
579
580	return VINF_SUCCESS;
581	}
582
583
584	static DECLCALLBACK(int) drvNATAsyncIoGuestWakeup(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
585	{
586	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
587
588	return VINF_SUCCESS;
589	}
590
591	#endif /* VBOX_WITH_SLIRP_MT */
592
593
594	/**
595	* Function called by slirp to check if it's possible to feed incoming data to the network port.
596	* @returns 1 if possible.
597	* @returns 0 if not possible.
598	*/
599	int slirp_can_output(void *pvUser)
600	{
601	return 1;
602	}
603
604	/**
605	* Function called by slirp to feed incoming data to the network port.
606	*/
607	void slirp_output(void pvUser, void pvArg, const uint8_t *pu8Buf, int cb)
608	{
609	PDRVNAT pThis = (PDRVNAT)pvUser;
610	Assert(pThis);
611
612	LogFlow(("slirp_output BEGIN %x %d\n", pu8Buf, cb));
613	Log2(("slirp_output: pu8Buf=%p cb=%#x (pThis=%p)\n%.*Rhxd\n", pu8Buf, cb, pThis, cb, pu8Buf));
614
615	#ifndef SLIRP_SPLIT_CAN_OUTPUT
616	PDRVNATQUEUITEM pItem = (PDRVNATQUEUITEM)PDMQueueAlloc(pThis->pRecvQueue);
617	if (pItem)
618	{
619	pItem->pu8Buf = pu8Buf;
620	pItem->cb = cb;
621	pItem->mbuf = pvArg;
622	Log2(("pItem:%p %.Rhxd\n", pItem, pItem->pu8Buf));
623	PDMQueueInsert(pThis->pRecvQueue, &pItem->Core);
624	STAM_COUNTER_INC(&pThis->StatQueuePktSent);
625	return;
626	}
627	static unsigned s_cDroppedPackets;
628	if (s_cDroppedPackets < 64)
629	s_cDroppedPackets++;
630	else
631	{
632	LogRel(("NAT: %d messages suppressed about dropping packet (couldn't allocate queue item)\n", s_cDroppedPackets));
633	s_cDroppedPackets = 0;
634	}
635	STAM_COUNTER_INC(&pThis->StatQueuePktDropped);
636	RTMemFree((void *)pu8Buf);
637	#else
638	PRTREQ pReq = NULL;
639
640	/* don't queue new requests when the NAT thread is about to stop */
641	if (pThis->pSlirpThread->enmState != PDMTHREADSTATE_RUNNING)
642	return;
643
644	int rc = RTReqAlloc(pThis->pRecvReqQueue, &pReq, RTREQTYPE_INTERNAL);
645	AssertReleaseRC(rc);
646	pReq->u.Internal.pfn = (PFNRT)drvNATRecvWorker;
647	pReq->u.Internal.cArgs = 3;
648	pReq->u.Internal.aArgs[0] = (uintptr_t)pThis;
649	pReq->u.Internal.aArgs[1] = (uintptr_t)pu8Buf;
650	pReq->u.Internal.aArgs[2] = (uintptr_t)cb;
651	pReq->fFlags = RTREQFLAGS_VOID\|RTREQFLAGS_NO_WAIT;
652	rc = RTReqQueue(pReq, 0);
653	AssertReleaseRC(rc);
654	drvNATRecvWakeup(pThis->pDrvIns, pThis->pRecvThread);
655	STAM_COUNTER_INC(&pThis->StatQueuePktSent);
656	#endif
657	}
658
659
660	#ifndef SLIRP_SPLIT_CAN_OUTPUT
661	/**
662	* Queue callback for processing a queued item.
663	*
664	* @returns Success indicator.
665	* If false the item will not be removed and the flushing will stop.
666	* @param pDrvIns The driver instance.
667	* @param pItemCore Pointer to the queue item to process.
668	*/
669	static DECLCALLBACK(bool) drvNATQueueConsumer(PPDMDRVINS pDrvIns, PPDMQUEUEITEMCORE pItemCore)
670	{
671	int rc;
672	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
673	PDRVNATQUEUITEM pItem = (PDRVNATQUEUITEM)pItemCore;
674	PRTREQ pReq = NULL;
675	Log(("drvNATQueueConsumer(pItem:%p, pu8Buf:%p, cb:%d)\n", pItem, pItem->pu8Buf, pItem->cb));
676	Log2(("drvNATQueueConsumer: pu8Buf:\n%.Rhxd\n", pItem->pu8Buf));
677	if (RT_FAILURE(pThis->pPort->pfnWaitReceiveAvail(pThis->pPort, 0)))
678	{
679	STAM_COUNTER_INC(&pThis->StatConsumerFalse);
680	return false;
681	}
682	rc = pThis->pPort->pfnReceive(pThis->pPort, pItem->pu8Buf, pItem->cb);
683	RTMemFree((void *)pItem->pu8Buf);
684	return true;
685
686	AssertRelease(pItem->mbuf == NULL);
687	return RT_SUCCESS(rc);
688	}
689	#endif
690
691
692	/**
693	* Queries an interface to the driver.
694	*
695	* @returns Pointer to interface.
696	* @returns NULL if the interface was not supported by the driver.
697	* @param pInterface Pointer to this interface structure.
698	* @param enmInterface The requested interface identification.
699	* @thread Any thread.
700	*/
701	static DECLCALLBACK(void *) drvNATQueryInterface(PPDMIBASE pInterface, PDMINTERFACE enmInterface)
702	{
703	PPDMDRVINS pDrvIns = PDMIBASE_2_PDMDRV(pInterface);
704	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
705	switch (enmInterface)
706	{
707	case PDMINTERFACE_BASE:
708	return &pDrvIns->IBase;
709	case PDMINTERFACE_NETWORK_CONNECTOR:
710	return &pThis->INetworkConnector;
711	default:
712	return NULL;
713	}
714	}
715
716
717	/**
718	* Get the MAC address into the slirp stack.
719	*
720	* Called by drvNATLoadDone and drvNATPowerOn.
721	*/
722	static void drvNATSetMac(PDRVNAT pThis)
723	{
724	if (pThis->pConfig)
725	{
726	RTMAC Mac;
727	pThis->pConfig->pfnGetMac(pThis->pConfig, &Mac);
728	slirp_set_ethaddr(pThis->pNATState, Mac.au8);
729	}
730	}
731
732
733	/**
734	* After loading we have to pass the MAC address of the ethernet device to the slirp stack.
735	* Otherwise the guest is not reachable until it performs a DHCP request or an ARP request
736	* (usually done during guest boot).
737	*/
738	static DECLCALLBACK(int) drvNATLoadDone(PPDMDRVINS pDrvIns, PSSMHANDLE pSSMHandle)
739	{
740	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
741	drvNATSetMac(pThis);
742	return VINF_SUCCESS;
743	}
744
745
746	/**
747	* Some guests might not use DHCP to retrieve an IP but use a static IP.
748	*/
749	static DECLCALLBACK(void) drvNATPowerOn(PPDMDRVINS pDrvIns)
750	{
751	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
752	drvNATSetMac(pThis);
753	}
754
755
756	/**
757	* Sets up the redirectors.
758	*
759	* @returns VBox status code.
760	* @param pCfgHandle The drivers configuration handle.
761	*/
762	static int drvNATConstructRedir(unsigned iInstance, PDRVNAT pThis, PCFGMNODE pCfgHandle, RTIPV4ADDR Network)
763	{
764	RTMAC Mac;
765	memset(&Mac, 0, sizeof(RTMAC)); /can't get MAC here /
766	/*
767	* Enumerate redirections.
768	*/
769	for (PCFGMNODE pNode = CFGMR3GetFirstChild(pCfgHandle); pNode; pNode = CFGMR3GetNextChild(pNode))
770	{
771	/*
772	* Validate the port forwarding config.
773	*/
774	if (!CFGMR3AreValuesValid(pNode, "Protocol\0UDP\0HostPort\0GuestPort\0GuestIP\0BindIP\0"))
775	return PDMDRV_SET_ERROR(pThis->pDrvIns, VERR_PDM_DRVINS_UNKNOWN_CFG_VALUES, N_("Unknown configuration in port forwarding"));
776
777	/* protocol type */
778	bool fUDP;
779	char szProtocol[32];
780	int rc;
781	GET_STRING(rc, pThis, pNode, "Protocol", szProtocol[0], sizeof(szProtocol));
782	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
783	{
784	fUDP = false;
785	GET_BOOL(rc, pThis, pNode, "UDP", fUDP);
786	}
787	else if (RT_SUCCESS(rc))
788	{
789	if (!RTStrICmp(szProtocol, "TCP"))
790	fUDP = false;
791	else if (!RTStrICmp(szProtocol, "UDP"))
792	fUDP = true;
793	else
794	return PDMDrvHlpVMSetError(pThis->pDrvIns, VERR_INVALID_PARAMETER, RT_SRC_POS,
795	N_("NAT#%d: Invalid configuration value for \"Protocol\": \"%s\""),
796	iInstance, szProtocol);
797	}
798	/* host port */
799	int32_t iHostPort;
800	GET_S32_STRICT(rc, pThis, pNode, "HostPort", iHostPort);
801
802	/* guest port */
803	int32_t iGuestPort;
804	GET_S32_STRICT(rc, pThis, pNode, "GuestPort", iGuestPort);
805
806	/* guest address */
807	struct in_addr GuestIP;
808	/* @todo (vvl) use CTL_* */
809	GETIP_DEF(rc, pThis, pNode, GuestIP, htonl(Network \| CTL_GUEST));
810
811	/*
812	* Call slirp about it.
813	*/
814	struct in_addr BindIP;
815	GETIP_DEF(rc, pThis, pNode, BindIP, INADDR_ANY);
816	if (slirp_redir(pThis->pNATState, fUDP, BindIP, iHostPort, GuestIP, iGuestPort, Mac.au8) < 0)
817	return PDMDrvHlpVMSetError(pThis->pDrvIns, VERR_NAT_REDIR_SETUP, RT_SRC_POS,
818	N_("NAT#%d: configuration error: failed to set up "
819	"redirection of %d to %d. Probably a conflict with "
820	"existing services or other rules"), iInstance, iHostPort,
821	iGuestPort);
822	} /* for each redir rule */
823
824	return VINF_SUCCESS;
825	}
826
827
828	/**
829	* Destruct a driver instance.
830	*
831	* Most VM resources are freed by the VM. This callback is provided so that any non-VM
832	* resources can be freed correctly.
833	*
834	* @param pDrvIns The driver instance data.
835	*/
836	static DECLCALLBACK(void) drvNATDestruct(PPDMDRVINS pDrvIns)
837	{
838	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
839
840	LogFlow(("drvNATDestruct:\n"));
841
842	slirp_term(pThis->pNATState);
843	slirp_deregister_statistics(pThis->pNATState, pDrvIns);
844	pThis->pNATState = NULL;
845	#ifdef VBOX_WITH_STATISTICS
846	# define DRV_PROFILE_COUNTER(name, dsc) DEREGISTER_COUNTER(name, pThis)
847	# define DRV_COUNTING_COUNTER(name, dsc) DEREGISTER_COUNTER(name, pThis)
848	# include "counters.h"
849	#endif
850	}
851
852
853	/**
854	* Construct a NAT network transport driver instance.
855	*
856	* @copydoc FNPDMDRVCONSTRUCT
857	*/
858	static DECLCALLBACK(int) drvNATConstruct(PPDMDRVINS pDrvIns, PCFGMNODE pCfgHandle, uint32_t fFlags)
859	{
860	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
861
862	LogFlow(("drvNATConstruct:\n"));
863
864	/*
865	* Validate the config.
866	*/
867	if (!CFGMR3AreValuesValid(pCfgHandle,
868	"PassDomain\0TFTPPrefix\0BootFile\0Network"
869	"\0NextServer\0DNSProxy\0BindIP\0"
870	"SocketRcvBuf\0SocketSndBuf\0TcpRcvSpace\0TcpSndSpace\0"))
871	return PDMDRV_SET_ERROR(pDrvIns, VERR_PDM_DRVINS_UNKNOWN_CFG_VALUES,
872	N_("Unknown NAT configuration option, only supports PassDomain,"
873	" TFTPPrefix, BootFile and Network"));
874
875	/*
876	* Init the static parts.
877	*/
878	pThis->pDrvIns = pDrvIns;
879	pThis->pNATState = NULL;
880	pThis->pszTFTPPrefix = NULL;
881	pThis->pszBootFile = NULL;
882	pThis->pszNextServer = NULL;
883	/* IBase */
884	pDrvIns->IBase.pfnQueryInterface = drvNATQueryInterface;
885	/* INetwork */
886	pThis->INetworkConnector.pfnSend = drvNATSend;
887	pThis->INetworkConnector.pfnSetPromiscuousMode = drvNATSetPromiscuousMode;
888	pThis->INetworkConnector.pfnNotifyLinkChanged = drvNATNotifyLinkChanged;
889
890	/*
891	* Get the configuration settings.
892	*/
893	int rc;
894	bool fPassDomain = true;
895	GET_BOOL(rc, pThis, pCfgHandle, "PassDomain", fPassDomain);
896
897	GET_STRING_ALLOC(rc, pThis, pCfgHandle, "TFTPPrefix", pThis->pszTFTPPrefix);
898	GET_STRING_ALLOC(rc, pThis, pCfgHandle, "BootFile", pThis->pszBootFile);
899	GET_STRING_ALLOC(rc, pThis, pCfgHandle, "NextServer", pThis->pszNextServer);
900
901	int fDNSProxy = 0;
902	GET_S32(rc, pThis, pCfgHandle, "DNSProxy", fDNSProxy);
903
904	/*
905	* Query the network port interface.
906	*/
907	pThis->pPort =
908	(PPDMINETWORKPORT)pDrvIns->pUpBase->pfnQueryInterface(pDrvIns->pUpBase,
909	PDMINTERFACE_NETWORK_PORT);
910	if (!pThis->pPort)
911	return PDMDRV_SET_ERROR(pDrvIns, VERR_PDM_MISSING_INTERFACE_ABOVE,
912	N_("Configuration error: the above device/driver didn't "
913	"export the network port interface"));
914	pThis->pConfig =
915	(PPDMINETWORKCONFIG)pDrvIns->pUpBase->pfnQueryInterface(pDrvIns->pUpBase,
916	PDMINTERFACE_NETWORK_CONFIG);
917	if (!pThis->pConfig)
918	return PDMDRV_SET_ERROR(pDrvIns, VERR_PDM_MISSING_INTERFACE_ABOVE,
919	N_("Configuration error: the above device/driver didn't "
920	"export the network config interface"));
921
922	/* Generate a network address for this network card. */
923	char szNetwork[32]; /* xxx.xxx.xxx.xxx/yy */
924	GET_STRING(rc, pThis, pCfgHandle, "Network", szNetwork[0], sizeof(szNetwork));
925	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
926	RTStrPrintf(szNetwork, sizeof(szNetwork), "10.0.%d.0/24", pDrvIns->iInstance + 2);
927
928	RTIPV4ADDR Network;
929	RTIPV4ADDR Netmask;
930	rc = RTCidrStrToIPv4(szNetwork, &Network, &Netmask);
931	if (RT_FAILURE(rc))
932	return PDMDrvHlpVMSetError(pDrvIns, rc, RT_SRC_POS, N_("NAT#%d: Configuration error: "
933	"network '%s' describes not a valid IPv4 network"),
934	pDrvIns->iInstance, szNetwork);
935
936	char szNetAddr[16];
937	RTStrPrintf(szNetAddr, sizeof(szNetAddr), "%d.%d.%d.%d",
938	(Network & 0xFF000000) >> 24, (Network & 0xFF0000) >> 16,
939	(Network & 0xFF00) >> 8, Network & 0xFF);
940
941	/*
942	* Initialize slirp.
943	*/
944	rc = slirp_init(&pThis->pNATState, &szNetAddr[0], Netmask, fPassDomain, pThis);
945	if (RT_SUCCESS(rc))
946	{
947	slirp_set_dhcp_TFTP_prefix(pThis->pNATState, pThis->pszTFTPPrefix);
948	slirp_set_dhcp_TFTP_bootfile(pThis->pNATState, pThis->pszBootFile);
949	slirp_set_dhcp_next_server(pThis->pNATState, pThis->pszNextServer);
950	slirp_set_dhcp_dns_proxy(pThis->pNATState, !!fDNSProxy);
951	char *pszBindIP = NULL;
952	GET_STRING_ALLOC(rc, pThis, pCfgHandle, "BindIP", pszBindIP);
953	rc = slirp_set_binding_address(pThis->pNATState, pszBindIP);
954	if (rc != 0)
955	LogRel(("NAT: value of BindIP has been ignored\n"));
956
957	if(pszBindIP != NULL)
958	MMR3HeapFree(pszBindIP);
959	#define SLIRP_SET_TUNING_VALUE(name, setter) \
960	do \
961	{ \
962	int len = 0; \
963	rc = CFGMR3QueryS32(pCfgHandle, name, &len); \
964	if (RT_SUCCESS(rc)) \
965	setter(pThis->pNATState, len); \
966	} while(0)
967
968	SLIRP_SET_TUNING_VALUE("SocketRcvBuf", slirp_set_rcvbuf);
969	SLIRP_SET_TUNING_VALUE("SocketSndBuf", slirp_set_sndbuf);
970	SLIRP_SET_TUNING_VALUE("TcpRcvSpace", slirp_set_tcp_rcvspace);
971	SLIRP_SET_TUNING_VALUE("TcpSndSpace", slirp_set_tcp_sndspace);
972
973	slirp_register_statistics(pThis->pNATState, pDrvIns);
974	#ifdef VBOX_WITH_STATISTICS
975	# define DRV_PROFILE_COUNTER(name, dsc) REGISTER_COUNTER(name, pThis, STAMTYPE_PROFILE, STAMUNIT_TICKS_PER_CALL, dsc)
976	# define DRV_COUNTING_COUNTER(name, dsc) REGISTER_COUNTER(name, pThis, STAMTYPE_COUNTER, STAMUNIT_COUNT, dsc)
977	# include "counters.h"
978	#endif
979
980	int rc2 = drvNATConstructRedir(pDrvIns->iInstance, pThis, pCfgHandle, Network);
981	if (RT_SUCCESS(rc2))
982	{
983	/*
984	* Register a load done notification to get the MAC address into the slirp
985	* engine after we loaded a guest state.
986	*/
987	rc2 = PDMDrvHlpSSMRegister(pDrvIns, pDrvIns->pDrvReg->szDriverName,
988	pDrvIns->iInstance, 0, 0,
989	NULL, NULL, NULL, NULL, NULL, drvNATLoadDone);
990	AssertRC(rc2);
991	rc = RTReqCreateQueue(&pThis->pSlirpReqQueue);
992	if (RT_FAILURE(rc))
993	{
994	LogRel(("NAT: Can't create request queue\n"));
995	return rc;
996	}
997
998
999	#ifndef SLIRP_SPLIT_CAN_OUTPUT
1000	rc = PDMDrvHlpPDMQueueCreate(pDrvIns, sizeof(DRVNATQUEUITEM), QUEUE_SIZE, 0,
1001	drvNATQueueConsumer, "NAT", &pThis->pRecvQueue);
1002	if (RT_FAILURE(rc))
1003	{
1004	LogRel(("NAT: Can't create send queue\n"));
1005	return rc;
1006	}
1007	#else
1008	rc = RTReqCreateQueue(&pThis->pRecvReqQueue);
1009	if (RT_FAILURE(rc))
1010	{
1011	LogRel(("NAT: Can't create request queue\n"));
1012	return rc;
1013	}
1014	rc = PDMDrvHlpPDMThreadCreate(pDrvIns, &pThis->pRecvThread, pThis, drvNATRecv,
1015	drvNATRecvWakeup, 128 * _1K, RTTHREADTYPE_IO, "NATRX");
1016	AssertReleaseRC(rc);
1017	rc = RTSemEventCreate(&pThis->EventRecv);
1018	#endif
1019
1020	#ifndef RT_OS_WINDOWS
1021	/*
1022	* Create the control pipe.
1023	*/
1024	int fds[2];
1025	if (pipe(&fds[0]) != 0) /** @todo RTPipeCreate() or something... */
1026	{
1027	int rc = RTErrConvertFromErrno(errno);
1028	AssertRC(rc);
1029	return rc;
1030	}
1031	pThis->PipeRead = fds[0];
1032	pThis->PipeWrite = fds[1];
1033	#else
1034	pThis->hWakeupEvent = CreateEvent(NULL, FALSE, FALSE, NULL); /* auto-reset event */
1035	slirp_register_external_event(pThis->pNATState, pThis->hWakeupEvent,
1036	VBOX_WAKEUP_EVENT_INDEX);
1037	#endif
1038
1039	rc = PDMDrvHlpPDMThreadCreate(pDrvIns, &pThis->pSlirpThread, pThis, drvNATAsyncIoThread,
1040	drvNATAsyncIoWakeup, 128 * _1K, RTTHREADTYPE_IO, "NAT");
1041	AssertReleaseRC(rc);
1042
1043	#ifdef VBOX_WITH_SLIRP_MT
1044	rc = PDMDrvHlpPDMThreadCreate(pDrvIns, &pThis->pGuestThread, pThis, drvNATAsyncIoGuest,
1045	drvNATAsyncIoGuestWakeup, 128 * _1K, RTTHREADTYPE_IO, "NATGUEST");
1046	AssertReleaseRC(rc);
1047	#endif
1048
1049	pThis->enmLinkState = PDMNETWORKLINKSTATE_UP;
1050
1051	/* might return VINF_NAT_DNS */
1052	return rc;
1053	}
1054	/* failure path */
1055	rc = rc2;
1056	slirp_term(pThis->pNATState);
1057	pThis->pNATState = NULL;
1058	}
1059	else
1060	{
1061	PDMDRV_SET_ERROR(pDrvIns, rc, N_("Unknown error during NAT networking setup: "));
1062	AssertMsgFailed(("Add error message for rc=%d (%Rrc)\n", rc, rc));
1063	}
1064
1065	return rc;
1066	}
1067
1068
1069	/**
1070	* NAT network transport driver registration record.
1071	*/
1072	const PDMDRVREG g_DrvNAT =
1073	{
1074	/* u32Version */
1075	PDM_DRVREG_VERSION,
1076	/* szDriverName */
1077	"NAT",
1078	/* pszDescription */
1079	"NAT Network Transport Driver",
1080	/* fFlags */
1081	PDM_DRVREG_FLAGS_HOST_BITS_DEFAULT,
1082	/* fClass. */
1083	PDM_DRVREG_CLASS_NETWORK,
1084	/* cMaxInstances */
1085	16,
1086	/* cbInstance */
1087	sizeof(DRVNAT),
1088	/* pfnConstruct */
1089	drvNATConstruct,
1090	/* pfnDestruct */
1091	drvNATDestruct,
1092	/* pfnIOCtl */
1093	NULL,
1094	/* pfnPowerOn */
1095	drvNATPowerOn,
1096	/* pfnReset */
1097	NULL,
1098	/* pfnSuspend */
1099	NULL,
1100	/* pfnResume */
1101	NULL,
1102	/* pfnAttach */
1103	NULL,
1104	/* pfnDetach */
1105	NULL,
1106	/* pfnPowerOff */
1107	NULL,
1108	/* pfnSoftReset */
1109	NULL,
1110	/* u32EndVersion */
1111	PDM_DRVREG_VERSION
1112	};
1113

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source: vbox/trunk/src/VBox/Devices/Network/DrvNAT.cpp@ 22451

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