DrvNAT.cpp@ 25125

Last change on this file since 25125 was 25125, checked in by vboxsync, 15 years ago
NAT: backed out r55479.
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File size: 42.0 KB

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1	/* $Id: DrvNAT.cpp 25125 2009-12-01 12:28:55Z 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.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	* 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	/*******************************************************************************
59	* Defined Constants And Macros *
60	*******************************************************************************/
61	#define GET_EXTRADATA(pthis, node, name, rc, type, type_name, var) \
62	do { \
63	(rc) = CFGMR3Query ## type((node), name, &(var)); \
64	if (RT_FAILURE((rc)) && (rc) != VERR_CFGM_VALUE_NOT_FOUND) \
65	return PDMDrvHlpVMSetError((pthis)->pDrvIns, (rc), RT_SRC_POS, N_("NAT#%d: configuration query for \""name"\" " #type_name " failed"), \
66	(pthis)->pDrvIns->iInstance); \
67	} while (0)
68
69	#define GET_ED_STRICT(pthis, node, name, rc, type, type_name, var) \
70	do { \
71	(rc) = CFGMR3Query ## type((node), name, &(var)); \
72	if (RT_FAILURE((rc))) \
73	return PDMDrvHlpVMSetError((pthis)->pDrvIns, (rc), RT_SRC_POS, N_("NAT#%d: configuration query for \""name"\" " #type_name " failed"), \
74	(pthis)->pDrvIns->iInstance); \
75	} while (0)
76
77	#define GET_EXTRADATA_N(pthis, node, name, rc, type, type_name, var, var_size) \
78	do { \
79	(rc) = CFGMR3Query ## type((node), name, &(var), var_size); \
80	if (RT_FAILURE((rc)) && (rc) != VERR_CFGM_VALUE_NOT_FOUND) \
81	return PDMDrvHlpVMSetError((pthis)->pDrvIns, (rc), RT_SRC_POS, N_("NAT#%d: configuration query for \""name"\" " #type_name " failed"), \
82	(pthis)->pDrvIns->iInstance); \
83	} while (0)
84
85	#define GET_BOOL(rc, pthis, node, name, var) \
86	GET_EXTRADATA(pthis, node, name, (rc), Bool, bolean, (var))
87	#define GET_STRING(rc, pthis, node, name, var, var_size) \
88	GET_EXTRADATA_N(pthis, node, name, (rc), String, string, (var), (var_size))
89	#define GET_STRING_ALLOC(rc, pthis, node, name, var) \
90	GET_EXTRADATA(pthis, node, name, (rc), StringAlloc, string, (var))
91	#define GET_S32(rc, pthis, node, name, var) \
92	GET_EXTRADATA(pthis, node, name, (rc), S32, int, (var))
93	#define GET_S32_STRICT(rc, pthis, node, name, var) \
94	GET_ED_STRICT(pthis, node, name, (rc), S32, int, (var))
95
96
97
98	#define DO_GET_IP(rc, node, instance, status, x) \
99	do { \
100	char sz##x[32]; \
101	GET_STRING((rc), (node), (instance), #x, sz ## x[0], sizeof(sz ## x)); \
102	if (rc != VERR_CFGM_VALUE_NOT_FOUND) \
103	(status) = inet_aton(sz ## x, &x); \
104	} while (0)
105
106	#define GETIP_DEF(rc, node, instance, x, def) \
107	do \
108	{ \
109	int status = 0; \
110	DO_GET_IP((rc), (node), (instance), status, x); \
111	if (status == 0 \|\| rc == VERR_CFGM_VALUE_NOT_FOUND) \
112	x.s_addr = def; \
113	} while (0)
114
115	/*******************************************************************************
116	* Structures and Typedefs *
117	*******************************************************************************/
118	/**
119	* NAT network transport driver instance data.
120	*/
121	typedef struct DRVNAT
122	{
123	/** The network interface. */
124	PDMINETWORKCONNECTOR INetworkConnector;
125	/** The port we're attached to. */
126	PPDMINETWORKPORT pPort;
127	/** The network config of the port we're attached to. */
128	PPDMINETWORKCONFIG pConfig;
129	/** Pointer to the driver instance. */
130	PPDMDRVINS pDrvIns;
131	/** Link state */
132	PDMNETWORKLINKSTATE enmLinkState;
133	/** NAT state for this instance. */
134	PNATState pNATState;
135	/** TFTP directory prefix. */
136	char *pszTFTPPrefix;
137	/** Boot file name to provide in the DHCP server response. */
138	char *pszBootFile;
139	/** tftp server name to provide in the DHCP server response. */
140	char *pszNextServer;
141	/* polling thread */
142	PPDMTHREAD pSlirpThread;
143	/** Queue for NAT-thread-external events. */
144	PRTREQQUEUE pSlirpReqQueue;
145
146	#ifdef VBOX_WITH_SLIRP_MT
147	PPDMTHREAD pGuestThread;
148	#endif
149	#ifndef RT_OS_WINDOWS
150	/** The write end of the control pipe. */
151	RTFILE PipeWrite;
152	/** The read end of the control pipe. */
153	RTFILE PipeRead;
154	# if HC_ARCH_BITS == 32
155	/** Alignment padding. */
156	uint32_t u32Alignment;
157	# endif
158	#else
159	/** for external notification */
160	HANDLE hWakeupEvent;
161	#endif
162
163	#define DRV_PROFILE_COUNTER(name, dsc) STAMPROFILE Stat ## name
164	#define DRV_COUNTING_COUNTER(name, dsc) STAMCOUNTER Stat ## name
165	#include "counters.h"
166	/** thread delivering packets for receiving by the guest */
167	PPDMTHREAD pRecvThread;
168	/** thread delivering urg packets for receiving by the guest */
169	PPDMTHREAD pUrgRecvThread;
170	/** event to wakeup the guest receive thread */
171	RTSEMEVENT EventRecv;
172	/** event to wakeup the guest urgent receive thread */
173	RTSEMEVENT EventUrgRecv;
174	/** Receive Req queue (deliver packets to the guest) */
175	PRTREQQUEUE pRecvReqQueue;
176	/** Receive Urgent Req queue (deliver packets to the guest) */
177	PRTREQQUEUE pUrgRecvReqQueue;
178
179	/* makes access to device func RecvAvail and Recv atomical */
180	RTCRITSECT csDevAccess;
181	volatile uint32_t cUrgPkt;
182	volatile uint32_t cPkt;
183	PTMTIMERR3 pTmrSlow;
184	PTMTIMERR3 pTmrFast;
185	} DRVNAT;
186	AssertCompileMemberAlignment(DRVNAT, StatNATRecvWakeups, 8);
187	/** Pointer the NAT driver instance data. */
188	typedef DRVNAT *PDRVNAT;
189
190	/**
191	* NAT queue item.
192	*/
193	typedef struct DRVNATQUEUITEM
194	{
195	/** The core part owned by the queue manager. */
196	PDMQUEUEITEMCORE Core;
197	/** The buffer for output to guest. */
198	const uint8_t *pu8Buf;
199	/* size of buffer */
200	size_t cb;
201	void *mbuf;
202	} DRVNATQUEUITEM;
203	/** Pointer to a NAT queue item. */
204	typedef DRVNATQUEUITEM *PDRVNATQUEUITEM;
205
206
207	static void drvNATNotifyNATThread(PDRVNAT pThis);
208	static DECLCALLBACK(void) drvNATSlowTimer(PPDMDRVINS pDrvIns, PTMTIMER pTimer, void *pvUser);
209	static DECLCALLBACK(void) drvNATFast(PPDMDRVINS pDrvIns, PTMTIMER pTimer, void *pvUser);
210
211
212	/** Converts a pointer to NAT::INetworkConnector to a PRDVNAT. */
213	#define PDMINETWORKCONNECTOR_2_DRVNAT(pInterface) ( (PDRVNAT)((uintptr_t)pInterface - RT_OFFSETOF(DRVNAT, INetworkConnector)) )
214
215	static DECLCALLBACK(void) drvNATSlowTimer(PPDMDRVINS pDrvIns, PTMTIMER pTimer, void *pvUser)
216	{
217	Assert(pvUser);
218	PDRVNAT pThis = (PDRVNAT)pvUser;
219	drvNATNotifyNATThread(pThis);
220	}
221
222	static DECLCALLBACK(void) drvNATFastTimer(PPDMDRVINS pDrvIns, PTMTIMER pTimer, void *pvUser)
223	{
224	Assert(pvUser);
225	PDRVNAT pThis = (PDRVNAT)pvUser;
226	drvNATNotifyNATThread(pThis);
227	}
228
229
230	static DECLCALLBACK(int) drvNATRecv(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
231	{
232	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
233
234	if (pThread->enmState == PDMTHREADSTATE_INITIALIZING)
235	return VINF_SUCCESS;
236
237	while (pThread->enmState == PDMTHREADSTATE_RUNNING)
238	{
239	RTReqProcess(pThis->pRecvReqQueue, 0);
240	if (ASMAtomicReadU32(&pThis->cPkt) == 0)
241	RTSemEventWait(pThis->EventRecv, RT_INDEFINITE_WAIT);
242	}
243	return VINF_SUCCESS;
244	}
245
246
247	static DECLCALLBACK(int) drvNATRecvWakeup(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
248	{
249	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
250	int rc;
251	if (ASMAtomicReadU32(&pThis->cPkt) > 0)
252	{
253	rc = RTSemEventSignal(pThis->EventRecv);
254	}
255
256	STAM_COUNTER_INC(&pThis->StatNATRecvWakeups);
257	return VINF_SUCCESS;
258	}
259
260	static DECLCALLBACK(int) drvNATUrgRecv(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
261	{
262	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
263
264	if (pThread->enmState == PDMTHREADSTATE_INITIALIZING)
265	return VINF_SUCCESS;
266
267	while (pThread->enmState == PDMTHREADSTATE_RUNNING)
268	{
269	RTReqProcess(pThis->pUrgRecvReqQueue, 0);
270	if (ASMAtomicReadU32(&pThis->cUrgPkt) == 0)
271	{
272	int rc = RTSemEventWait(pThis->EventUrgRecv, RT_INDEFINITE_WAIT);
273	AssertRC(rc);
274	}
275	}
276	return VINF_SUCCESS;
277	}
278	static DECLCALLBACK(int) drvNATUrgRecvWakeup(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
279	{
280	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
281	if (ASMAtomicReadU32(&pThis->cUrgPkt) > 0)
282	{
283	int rc = RTSemEventSignal(pThis->EventUrgRecv);
284	AssertRC(rc);
285	}
286
287	return VINF_SUCCESS;
288	}
289
290	static DECLCALLBACK(void) drvNATUrgRecvWorker(PDRVNAT pThis, uint8_t pu8Buf, int cb, void pvArg)
291	{
292	int rc = RTCritSectEnter(&pThis->csDevAccess);
293	AssertRC(rc);
294	rc = pThis->pPort->pfnWaitReceiveAvail(pThis->pPort, RT_INDEFINITE_WAIT);
295	if (RT_SUCCESS(rc))
296	{
297	rc = pThis->pPort->pfnReceive(pThis->pPort, pu8Buf, cb);
298	AssertRC(rc);
299	}
300	else if ( RT_FAILURE(rc)
301	&& ( rc == VERR_TIMEOUT
302	&& rc == VERR_INTERRUPTED))
303	{
304	AssertRC(rc);
305	}
306
307	rc = RTCritSectLeave(&pThis->csDevAccess);
308	AssertRC(rc);
309
310	slirp_ext_m_free(pThis->pNATState, pvArg);
311	if (ASMAtomicDecU32(&pThis->cUrgPkt) == 0)
312	{
313	drvNATRecvWakeup(pThis->pDrvIns, pThis->pRecvThread);
314	drvNATNotifyNATThread(pThis);
315	}
316	}
317
318
319	static DECLCALLBACK(void) drvNATRecvWorker(PDRVNAT pThis, uint8_t pu8Buf, int cb, void pvArg)
320	{
321	int rc;
322	STAM_PROFILE_START(&pThis->StatNATRecv, a);
323
324	STAM_PROFILE_START(&pThis->StatNATRecvWait, b);
325
326	while(ASMAtomicReadU32(&pThis->cUrgPkt) != 0)
327	{
328	rc = RTSemEventWait(pThis->EventRecv, RT_INDEFINITE_WAIT);
329	if ( RT_FAILURE(rc)
330	&& ( rc == VERR_TIMEOUT
331	\|\| rc == VERR_INTERRUPTED))
332	goto done_unlocked;
333	}
334
335	rc = RTCritSectEnter(&pThis->csDevAccess);
336
337	rc = pThis->pPort->pfnWaitReceiveAvail(pThis->pPort, RT_INDEFINITE_WAIT);
338	if (RT_SUCCESS(rc))
339	{
340	rc = pThis->pPort->pfnReceive(pThis->pPort, pu8Buf, cb);
341	AssertRC(rc);
342	}
343	else if ( RT_FAILURE(rc)
344	&& ( rc != VERR_TIMEOUT
345	&& rc != VERR_INTERRUPTED))
346	{
347	AssertRC(rc);
348	}
349
350	rc = RTCritSectLeave(&pThis->csDevAccess);
351	AssertRC(rc);
352	done_unlocked:
353	slirp_ext_m_free(pThis->pNATState, pvArg);
354	ASMAtomicDecU32(&pThis->cPkt);
355
356	drvNATNotifyNATThread(pThis);
357
358	STAM_PROFILE_STOP(&pThis->StatNATRecvWait, b);
359	STAM_PROFILE_STOP(&pThis->StatNATRecv, a);
360	}
361
362	/**
363	* Worker function for drvNATSend().
364	* @thread "NAT" thread.
365	*/
366	static void drvNATSendWorker(PDRVNAT pThis, void *pvBuf, size_t cb)
367	{
368	Assert(pThis->enmLinkState == PDMNETWORKLINKSTATE_UP);
369	if (pThis->enmLinkState == PDMNETWORKLINKSTATE_UP)
370	slirp_input(pThis->pNATState, pvBuf);
371	}
372
373
374	/**
375	* Called by the guest to send data to the network.
376	*
377	* @returns VBox status code.
378	* @param pInterface Pointer to the interface structure containing the called function pointer.
379	* @param pvBuf Data to send.
380	* @param cb Number of bytes to send.
381	* @thread EMT
382	*/
383	static DECLCALLBACK(int) drvNATSend(PPDMINETWORKCONNECTOR pInterface, const void *pvBuf, size_t cb)
384	{
385	PDRVNAT pThis = PDMINETWORKCONNECTOR_2_DRVNAT(pInterface);
386
387	LogFlow(("drvNATSend: pvBuf=%p cb=%#x\n", pvBuf, cb));
388	Log2(("drvNATSend: pvBuf=%p cb=%#x\n%.*Rhxd\n", pvBuf, cb, cb, pvBuf));
389
390	PRTREQ pReq = NULL;
391	int rc;
392	void *buf;
393
394	/* don't queue new requests when the NAT thread is about to stop */
395	if (pThis->pSlirpThread->enmState != PDMTHREADSTATE_RUNNING)
396	return VINF_SUCCESS;
397
398	#ifndef VBOX_WITH_SLIRP_MT
399	rc = RTReqAlloc(pThis->pSlirpReqQueue, &pReq, RTREQTYPE_INTERNAL);
400	#else
401	rc = RTReqAlloc((PRTREQQUEUE)slirp_get_queue(pThis->pNATState), &pReq, RTREQTYPE_INTERNAL);
402	#endif
403	AssertRC(rc);
404
405	/* @todo: Here we should get mbuf instead temporal buffer */
406	#if 0
407	buf = RTMemAlloc(cb);
408	if (buf == NULL)
409	{
410	LogRel(("NAT: Can't allocate send buffer\n"));
411	return VERR_NO_MEMORY;
412	}
413	memcpy(buf, pvBuf, cb);
414	#else
415	void *pvmBuf = slirp_ext_m_get(pThis->pNATState);
416	Assert(pvmBuf);
417	slirp_ext_m_append(pThis->pNATState, pvmBuf, (uint8_t *)pvBuf, cb);
418	#endif
419
420	pReq->u.Internal.pfn = (PFNRT)drvNATSendWorker;
421	pReq->u.Internal.cArgs = 2;
422	pReq->u.Internal.aArgs[0] = (uintptr_t)pThis;
423	pReq->u.Internal.aArgs[1] = (uintptr_t)pvmBuf;
424	pReq->fFlags = RTREQFLAGS_VOID\|RTREQFLAGS_NO_WAIT;
425
426	rc = RTReqQueue(pReq, 0); /* don't wait, we have to wakeup the NAT thread fist */
427	AssertRC(rc);
428	drvNATNotifyNATThread(pThis);
429	LogFlow(("drvNATSend: end\n"));
430	return VINF_SUCCESS;
431	}
432
433
434	/**
435	* Get the NAT thread out of poll/WSAWaitForMultipleEvents
436	*/
437	static void drvNATNotifyNATThread(PDRVNAT pThis)
438	{
439	int rc;
440	#ifndef RT_OS_WINDOWS
441	/* kick select() */
442	rc = RTFileWrite(pThis->PipeWrite, "", 1, NULL);
443	#else
444	/* kick WSAWaitForMultipleEvents */
445	rc = WSASetEvent(pThis->hWakeupEvent);
446	#endif
447	AssertRC(rc);
448	}
449
450
451	/**
452	* Set promiscuous mode.
453	*
454	* This is called when the promiscuous mode is set. This means that there doesn't have
455	* to be a mode change when it's called.
456	*
457	* @param pInterface Pointer to the interface structure containing the called function pointer.
458	* @param fPromiscuous Set if the adaptor is now in promiscuous mode. Clear if it is not.
459	* @thread EMT
460	*/
461	static DECLCALLBACK(void) drvNATSetPromiscuousMode(PPDMINETWORKCONNECTOR pInterface, bool fPromiscuous)
462	{
463	LogFlow(("drvNATSetPromiscuousMode: fPromiscuous=%d\n", fPromiscuous));
464	/* nothing to do */
465	}
466
467	/**
468	* Worker function for drvNATNotifyLinkChanged().
469	* @thread "NAT" thread.
470	*/
471	static void drvNATNotifyLinkChangedWorker(PDRVNAT pThis, PDMNETWORKLINKSTATE enmLinkState)
472	{
473	pThis->enmLinkState = enmLinkState;
474
475	switch (enmLinkState)
476	{
477	case PDMNETWORKLINKSTATE_UP:
478	LogRel(("NAT: link up\n"));
479	slirp_link_up(pThis->pNATState);
480	break;
481
482	case PDMNETWORKLINKSTATE_DOWN:
483	case PDMNETWORKLINKSTATE_DOWN_RESUME:
484	LogRel(("NAT: link down\n"));
485	slirp_link_down(pThis->pNATState);
486	break;
487
488	default:
489	AssertMsgFailed(("drvNATNotifyLinkChanged: unexpected link state %d\n", enmLinkState));
490	}
491	}
492
493
494	/**
495	* Notification on link status changes.
496	*
497	* @param pInterface Pointer to the interface structure containing the called function pointer.
498	* @param enmLinkState The new link state.
499	* @thread EMT
500	*/
501	static DECLCALLBACK(void) drvNATNotifyLinkChanged(PPDMINETWORKCONNECTOR pInterface, PDMNETWORKLINKSTATE enmLinkState)
502	{
503	PDRVNAT pThis = PDMINETWORKCONNECTOR_2_DRVNAT(pInterface);
504
505	LogFlow(("drvNATNotifyLinkChanged: enmLinkState=%d\n", enmLinkState));
506
507	PRTREQ pReq = NULL;
508
509	/* don't queue new requests when the NAT thread is about to stop */
510	if (pThis->pSlirpThread->enmState != PDMTHREADSTATE_RUNNING)
511	return;
512
513	int rc = RTReqAlloc(pThis->pSlirpReqQueue, &pReq, RTREQTYPE_INTERNAL);
514	AssertRC(rc);
515	pReq->u.Internal.pfn = (PFNRT)drvNATNotifyLinkChangedWorker;
516	pReq->u.Internal.cArgs = 2;
517	pReq->u.Internal.aArgs[0] = (uintptr_t)pThis;
518	pReq->u.Internal.aArgs[1] = (uintptr_t)enmLinkState;
519	pReq->fFlags = RTREQFLAGS_VOID;
520	rc = RTReqQueue(pReq, 0); /* don't wait, we have to wakeup the NAT thread fist */
521	if (RT_LIKELY(rc == VERR_TIMEOUT))
522	{
523	drvNATNotifyNATThread(pThis);
524	rc = RTReqWait(pReq, RT_INDEFINITE_WAIT);
525	AssertRC(rc);
526	}
527	else
528	AssertRC(rc);
529	RTReqFree(pReq);
530	}
531
532	/**
533	* NAT thread handling the slirp stuff. The slirp implementation is single-threaded
534	* so we execute this enginre in a dedicated thread. We take care that this thread
535	* does not become the bottleneck: If the guest wants to send, a request is enqueued
536	* into the pSlirpReqQueue and handled asynchronously by this thread. If this thread
537	* wants to deliver packets to the guest, it enqueues a request into pRecvReqQueue
538	* which is later handled by the Recv thread.
539	*/
540	static DECLCALLBACK(int) drvNATAsyncIoThread(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
541	{
542	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
543	int nFDs = -1;
544	unsigned int ms;
545	#ifdef RT_OS_WINDOWS
546	DWORD event;
547	HANDLE *phEvents;
548	unsigned int cBreak = 0;
549	#else /* RT_OS_WINDOWS */
550	struct pollfd *polls = NULL;
551	unsigned int cPollNegRet = 0;
552	#endif /* !RT_OS_WINDOWS */
553
554	LogFlow(("drvNATAsyncIoThread: pThis=%p\n", pThis));
555
556	if (pThread->enmState == PDMTHREADSTATE_INITIALIZING)
557	return VINF_SUCCESS;
558
559	#ifdef RT_OS_WINDOWS
560	phEvents = slirp_get_events(pThis->pNATState);
561	#endif /* RT_OS_WINDOWS */
562
563	/*
564	* Polling loop.
565	*/
566	while (pThread->enmState == PDMTHREADSTATE_RUNNING)
567	{
568	nFDs = -1;
569	/*
570	* To prevent concurent execution of sending/receving threads
571	*/
572	#ifndef RT_OS_WINDOWS
573	nFDs = slirp_get_nsock(pThis->pNATState);
574	polls = NULL;
575	/* allocation for all sockets + Management pipe */
576	polls = (struct pollfd )RTMemAlloc((1 + nFDs) sizeof(struct pollfd) + sizeof(uint32_t));
577	if (polls == NULL)
578	return VERR_NO_MEMORY;
579
580	/* don't pass the managemant pipe */
581	slirp_select_fill(pThis->pNATState, &nFDs, &polls[1]);
582	#if 0
583	ms = slirp_get_timeout_ms(pThis->pNATState);
584	#else
585	ms = 0;
586	#endif
587
588	polls[0].fd = pThis->PipeRead;
589	/* POLLRDBAND usually doesn't used on Linux but seems used on Solaris */
590	polls[0].events = POLLRDNORM\|POLLPRI\|POLLRDBAND;
591	polls[0].revents = 0;
592
593	int cChangedFDs = poll(polls, nFDs + 1, ms ? ms : -1);
594	if (cChangedFDs < 0)
595	{
596	if (errno == EINTR)
597	{
598	Log2(("NAT: signal was caught while sleep on poll\n"));
599	/* No error, just process all outstanding requests but don't wait */
600	cChangedFDs = 0;
601	}
602	else if (cPollNegRet++ > 128)
603	{
604	LogRel(("NAT:Poll returns (%s) suppressed %d\n", strerror(errno), cPollNegRet));
605	cPollNegRet = 0;
606	}
607	}
608
609	if (cChangedFDs >= 0)
610	{
611	slirp_select_poll(pThis->pNATState, &polls[1], nFDs);
612	if (polls[0].revents & (POLLRDNORM\|POLLPRI\|POLLRDBAND))
613	{
614	/* drain the pipe */
615	char ch[1];
616	size_t cbRead;
617	int counter = 0;
618	/*
619	* drvNATSend decoupled so we don't know how many times
620	* device's thread sends before we've entered multiplex,
621	* so to avoid false alarm drain pipe here to the very end
622	*
623	* @todo: Probably we should counter drvNATSend to count how
624	* deep pipe has been filed before drain.
625	*
626	* XXX:Make it reading exactly we need to drain the pipe.
627	*/
628	RTFileRead(pThis->PipeRead, &ch, 1, &cbRead);
629	}
630	}
631	/* process _all_ outstanding requests but don't wait */
632	RTReqProcess(pThis->pSlirpReqQueue, 0);
633	RTMemFree(polls);
634	#else /* RT_OS_WINDOWS */
635	slirp_select_fill(pThis->pNATState, &nFDs);
636	#if 0
637	ms = slirp_get_timeout_ms(pThis->pNATState);
638	#else
639	ms = 0;
640	#endif
641	struct timeval tv = { 0, ms*1000 };
642	event = WSAWaitForMultipleEvents(nFDs, phEvents, FALSE, ms ? ms : WSA_INFINITE, FALSE);
643	if ( (event < WSA_WAIT_EVENT_0 \|\| event > WSA_WAIT_EVENT_0 + nFDs - 1)
644	&& event != WSA_WAIT_TIMEOUT)
645	{
646	int error = WSAGetLastError();
647	LogRel(("NAT: WSAWaitForMultipleEvents returned %d (error %d)\n", event, error));
648	RTAssertPanic();
649	}
650
651	if (event == WSA_WAIT_TIMEOUT)
652	{
653	/* only check for slow/fast timers */
654	slirp_select_poll(pThis->pNATState, /* fTimeout=/true, /fIcmp=*/false);
655	continue;
656	}
657	/* poll the sockets in any case */
658	Log2(("%s: poll\n", __FUNCTION__));
659	slirp_select_poll(pThis->pNATState, /* fTimeout=/false, / fIcmp=*/(event == WSA_WAIT_EVENT_0));
660	/* process _all_ outstanding requests but don't wait */
661	RTReqProcess(pThis->pSlirpReqQueue, 0);
662	# ifdef VBOX_NAT_DELAY_HACK
663	if (cBreak++ > 128)
664	{
665	cBreak = 0;
666	RTThreadSleep(2);
667	}
668	# endif
669	#endif /* RT_OS_WINDOWS */
670	}
671
672	return VINF_SUCCESS;
673	}
674
675
676	/**
677	* Unblock the send thread so it can respond to a state change.
678	*
679	* @returns VBox status code.
680	* @param pDevIns The pcnet device instance.
681	* @param pThread The send thread.
682	*/
683	static DECLCALLBACK(int) drvNATAsyncIoWakeup(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
684	{
685	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
686
687	drvNATNotifyNATThread(pThis);
688	return VINF_SUCCESS;
689	}
690
691	#ifdef VBOX_WITH_SLIRP_MT
692
693	static DECLCALLBACK(int) drvNATAsyncIoGuest(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
694	{
695	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
696
697	if (pThread->enmState == PDMTHREADSTATE_INITIALIZING)
698	return VINF_SUCCESS;
699
700	while (pThread->enmState == PDMTHREADSTATE_RUNNING)
701	slirp_process_queue(pThis->pNATState);
702
703	return VINF_SUCCESS;
704	}
705
706
707	static DECLCALLBACK(int) drvNATAsyncIoGuestWakeup(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
708	{
709	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
710
711	return VINF_SUCCESS;
712	}
713
714	#endif /* VBOX_WITH_SLIRP_MT */
715
716	void slirp_arm_fast_timer(void *pvUser)
717	{
718	PDRVNAT pThis = (PDRVNAT)pvUser;
719	Assert(pThis);
720	TMTimerSetMillies(pThis->pTmrFast, 2);
721	}
722
723	void slirp_arm_slow_timer(void *pvUser)
724	{
725	PDRVNAT pThis = (PDRVNAT)pvUser;
726	Assert(pThis);
727	TMTimerSetMillies(pThis->pTmrSlow, 500);
728	}
729
730	/**
731	* Function called by slirp to check if it's possible to feed incoming data to the network port.
732	* @returns 1 if possible.
733	* @returns 0 if not possible.
734	*/
735	int slirp_can_output(void *pvUser)
736	{
737	return 1;
738	}
739
740	void slirp_push_recv_thread(void *pvUser)
741	{
742	PDRVNAT pThis = (PDRVNAT)pvUser;
743	Assert(pThis);
744	drvNATUrgRecvWakeup(pThis->pDrvIns, pThis->pUrgRecvThread);
745	}
746
747	void slirp_urg_output(void pvUser, void pvArg, const uint8_t *pu8Buf, int cb)
748	{
749	PDRVNAT pThis = (PDRVNAT)pvUser;
750	Assert(pThis);
751
752	PRTREQ pReq = NULL;
753
754	/* don't queue new requests when the NAT thread is about to stop */
755	if (pThis->pSlirpThread->enmState != PDMTHREADSTATE_RUNNING)
756	return;
757
758	int rc = RTReqAlloc(pThis->pUrgRecvReqQueue, &pReq, RTREQTYPE_INTERNAL);
759	AssertRC(rc);
760	ASMAtomicIncU32(&pThis->cUrgPkt);
761	pReq->u.Internal.pfn = (PFNRT)drvNATUrgRecvWorker;
762	pReq->u.Internal.cArgs = 4;
763	pReq->u.Internal.aArgs[0] = (uintptr_t)pThis;
764	pReq->u.Internal.aArgs[1] = (uintptr_t)pu8Buf;
765	pReq->u.Internal.aArgs[2] = (uintptr_t)cb;
766	pReq->u.Internal.aArgs[3] = (uintptr_t)pvArg;
767	pReq->fFlags = RTREQFLAGS_VOID\|RTREQFLAGS_NO_WAIT;
768	rc = RTReqQueue(pReq, 0);
769	AssertRC(rc);
770	drvNATUrgRecvWakeup(pThis->pDrvIns, pThis->pUrgRecvThread);
771	}
772
773	/**
774	* Function called by slirp to feed incoming data to the network port.
775	*/
776	void slirp_output(void pvUser, void pvArg, const uint8_t *pu8Buf, int cb)
777	{
778	PDRVNAT pThis = (PDRVNAT)pvUser;
779	Assert(pThis);
780
781	LogFlow(("slirp_output BEGIN %x %d\n", pu8Buf, cb));
782	Log2(("slirp_output: pu8Buf=%p cb=%#x (pThis=%p)\n%.*Rhxd\n", pu8Buf, cb, pThis, cb, pu8Buf));
783
784	PRTREQ pReq = NULL;
785
786	/* don't queue new requests when the NAT thread is about to stop */
787	if (pThis->pSlirpThread->enmState != PDMTHREADSTATE_RUNNING)
788	return;
789
790	int rc = RTReqAlloc(pThis->pRecvReqQueue, &pReq, RTREQTYPE_INTERNAL);
791	AssertRC(rc);
792	ASMAtomicIncU32(&pThis->cPkt);
793	pReq->u.Internal.pfn = (PFNRT)drvNATRecvWorker;
794	pReq->u.Internal.cArgs = 4;
795	pReq->u.Internal.aArgs[0] = (uintptr_t)pThis;
796	pReq->u.Internal.aArgs[1] = (uintptr_t)pu8Buf;
797	pReq->u.Internal.aArgs[2] = (uintptr_t)cb;
798	pReq->u.Internal.aArgs[3] = (uintptr_t)pvArg;
799	pReq->fFlags = RTREQFLAGS_VOID\|RTREQFLAGS_NO_WAIT;
800	rc = RTReqQueue(pReq, 0);
801	AssertRC(rc);
802	drvNATRecvWakeup(pThis->pDrvIns, pThis->pRecvThread);
803	STAM_COUNTER_INC(&pThis->StatQueuePktSent);
804	}
805
806
807	/**
808	* Queries an interface to the driver.
809	*
810	* @returns Pointer to interface.
811	* @returns NULL if the interface was not supported by the driver.
812	* @param pInterface Pointer to this interface structure.
813	* @param enmInterface The requested interface identification.
814	* @thread Any thread.
815	*/
816	static DECLCALLBACK(void *) drvNATQueryInterface(PPDMIBASE pInterface, PDMINTERFACE enmInterface)
817	{
818	PPDMDRVINS pDrvIns = PDMIBASE_2_PDMDRV(pInterface);
819	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
820	switch (enmInterface)
821	{
822	case PDMINTERFACE_BASE:
823	return &pDrvIns->IBase;
824	case PDMINTERFACE_NETWORK_CONNECTOR:
825	return &pThis->INetworkConnector;
826	default:
827	return NULL;
828	}
829	}
830
831
832	/**
833	* Get the MAC address into the slirp stack.
834	*
835	* Called by drvNATLoadDone and drvNATPowerOn.
836	*/
837	static void drvNATSetMac(PDRVNAT pThis)
838	{
839	if (pThis->pConfig)
840	{
841	RTMAC Mac;
842	pThis->pConfig->pfnGetMac(pThis->pConfig, &Mac);
843	slirp_set_ethaddr(pThis->pNATState, Mac.au8);
844	}
845	}
846
847
848	/**
849	* After loading we have to pass the MAC address of the ethernet device to the slirp stack.
850	* Otherwise the guest is not reachable until it performs a DHCP request or an ARP request
851	* (usually done during guest boot).
852	*/
853	static DECLCALLBACK(int) drvNATLoadDone(PPDMDRVINS pDrvIns, PSSMHANDLE pSSMHandle)
854	{
855	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
856	drvNATSetMac(pThis);
857	return VINF_SUCCESS;
858	}
859
860
861	/**
862	* Some guests might not use DHCP to retrieve an IP but use a static IP.
863	*/
864	static DECLCALLBACK(void) drvNATPowerOn(PPDMDRVINS pDrvIns)
865	{
866	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
867	drvNATSetMac(pThis);
868	}
869
870
871	/**
872	* Sets up the redirectors.
873	*
874	* @returns VBox status code.
875	* @param pCfgHandle The drivers configuration handle.
876	*/
877	static int drvNATConstructRedir(unsigned iInstance, PDRVNAT pThis, PCFGMNODE pCfgHandle, RTIPV4ADDR Network)
878	{
879	RTMAC Mac;
880	memset(&Mac, 0, sizeof(RTMAC)); /can't get MAC here /
881	/*
882	* Enumerate redirections.
883	*/
884	for (PCFGMNODE pNode = CFGMR3GetFirstChild(pCfgHandle); pNode; pNode = CFGMR3GetNextChild(pNode))
885	{
886	/*
887	* Validate the port forwarding config.
888	*/
889	if (!CFGMR3AreValuesValid(pNode, "Protocol\0UDP\0HostPort\0GuestPort\0GuestIP\0BindIP\0"))
890	return PDMDRV_SET_ERROR(pThis->pDrvIns, VERR_PDM_DRVINS_UNKNOWN_CFG_VALUES, N_("Unknown configuration in port forwarding"));
891
892	/* protocol type */
893	bool fUDP;
894	char szProtocol[32];
895	int rc;
896	GET_STRING(rc, pThis, pNode, "Protocol", szProtocol[0], sizeof(szProtocol));
897	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
898	{
899	fUDP = false;
900	GET_BOOL(rc, pThis, pNode, "UDP", fUDP);
901	}
902	else if (RT_SUCCESS(rc))
903	{
904	if (!RTStrICmp(szProtocol, "TCP"))
905	fUDP = false;
906	else if (!RTStrICmp(szProtocol, "UDP"))
907	fUDP = true;
908	else
909	return PDMDrvHlpVMSetError(pThis->pDrvIns, VERR_INVALID_PARAMETER, RT_SRC_POS,
910	N_("NAT#%d: Invalid configuration value for \"Protocol\": \"%s\""),
911	iInstance, szProtocol);
912	}
913	/* host port */
914	int32_t iHostPort;
915	GET_S32_STRICT(rc, pThis, pNode, "HostPort", iHostPort);
916
917	/* guest port */
918	int32_t iGuestPort;
919	GET_S32_STRICT(rc, pThis, pNode, "GuestPort", iGuestPort);
920
921	/* guest address */
922	struct in_addr GuestIP;
923	/* @todo (vvl) use CTL_* */
924	GETIP_DEF(rc, pThis, pNode, GuestIP, htonl(Network \| CTL_GUEST));
925
926	/*
927	* Call slirp about it.
928	*/
929	struct in_addr BindIP;
930	GETIP_DEF(rc, pThis, pNode, BindIP, INADDR_ANY);
931	if (slirp_redir(pThis->pNATState, fUDP, BindIP, iHostPort, GuestIP, iGuestPort, Mac.au8) < 0)
932	return PDMDrvHlpVMSetError(pThis->pDrvIns, VERR_NAT_REDIR_SETUP, RT_SRC_POS,
933	N_("NAT#%d: configuration error: failed to set up "
934	"redirection of %d to %d. Probably a conflict with "
935	"existing services or other rules"), iInstance, iHostPort,
936	iGuestPort);
937	} /* for each redir rule */
938
939	return VINF_SUCCESS;
940	}
941
942
943	/**
944	* Destruct a driver instance.
945	*
946	* Most VM resources are freed by the VM. This callback is provided so that any non-VM
947	* resources can be freed correctly.
948	*
949	* @param pDrvIns The driver instance data.
950	*/
951	static DECLCALLBACK(void) drvNATDestruct(PPDMDRVINS pDrvIns)
952	{
953	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
954
955	LogFlow(("drvNATDestruct:\n"));
956
957	slirp_term(pThis->pNATState);
958	slirp_deregister_statistics(pThis->pNATState, pDrvIns);
959	pThis->pNATState = NULL;
960	#ifdef VBOX_WITH_STATISTICS
961	# define DRV_PROFILE_COUNTER(name, dsc) DEREGISTER_COUNTER(name, pThis)
962	# define DRV_COUNTING_COUNTER(name, dsc) DEREGISTER_COUNTER(name, pThis)
963	# include "counters.h"
964	#endif
965	}
966
967
968	/**
969	* Construct a NAT network transport driver instance.
970	*
971	* @copydoc FNPDMDRVCONSTRUCT
972	*/
973	static DECLCALLBACK(int) drvNATConstruct(PPDMDRVINS pDrvIns, PCFGMNODE pCfgHandle, uint32_t fFlags)
974	{
975	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
976
977	LogFlow(("drvNATConstruct:\n"));
978
979	/*
980	* Validate the config.
981	*/
982	if (!CFGMR3AreValuesValid(pCfgHandle,
983	"PassDomain\0TFTPPrefix\0BootFile\0Network"
984	"\0NextServer\0DNSProxy\0BindIP\0UseHostResolver\0"
985	#ifdef VBOX_WITH_SLIRP_BSD_MBUF
986	"SlirpMTU\0"
987	#endif
988	"SocketRcvBuf\0SocketSndBuf\0TcpRcvSpace\0TcpSndSpace\0"))
989	return PDMDRV_SET_ERROR(pDrvIns, VERR_PDM_DRVINS_UNKNOWN_CFG_VALUES,
990	N_("Unknown NAT configuration option, only supports PassDomain,"
991	" TFTPPrefix, BootFile and Network"));
992
993	/*
994	* Init the static parts.
995	*/
996	pThis->pDrvIns = pDrvIns;
997	pThis->pNATState = NULL;
998	pThis->pszTFTPPrefix = NULL;
999	pThis->pszBootFile = NULL;
1000	pThis->pszNextServer = NULL;
1001	/* IBase */
1002	pDrvIns->IBase.pfnQueryInterface = drvNATQueryInterface;
1003	/* INetwork */
1004	pThis->INetworkConnector.pfnSend = drvNATSend;
1005	pThis->INetworkConnector.pfnSetPromiscuousMode = drvNATSetPromiscuousMode;
1006	pThis->INetworkConnector.pfnNotifyLinkChanged = drvNATNotifyLinkChanged;
1007
1008	/*
1009	* Get the configuration settings.
1010	*/
1011	int rc;
1012	bool fPassDomain = true;
1013	GET_BOOL(rc, pThis, pCfgHandle, "PassDomain", fPassDomain);
1014
1015	GET_STRING_ALLOC(rc, pThis, pCfgHandle, "TFTPPrefix", pThis->pszTFTPPrefix);
1016	GET_STRING_ALLOC(rc, pThis, pCfgHandle, "BootFile", pThis->pszBootFile);
1017	GET_STRING_ALLOC(rc, pThis, pCfgHandle, "NextServer", pThis->pszNextServer);
1018
1019	int fDNSProxy = 0;
1020	GET_S32(rc, pThis, pCfgHandle, "DNSProxy", fDNSProxy);
1021	int fUseHostResolver = 0;
1022	GET_S32(rc, pThis, pCfgHandle, "UseHostResolver", fUseHostResolver);
1023	#ifdef VBOX_WITH_SLIRP_BSD_MBUF
1024	int MTU = 1500;
1025	GET_S32(rc, pThis, pCfgHandle, "SlirpMTU", MTU);
1026	#endif
1027
1028	/*
1029	* Query the network port interface.
1030	*/
1031	pThis->pPort =
1032	(PPDMINETWORKPORT)pDrvIns->pUpBase->pfnQueryInterface(pDrvIns->pUpBase,
1033	PDMINTERFACE_NETWORK_PORT);
1034	if (!pThis->pPort)
1035	return PDMDRV_SET_ERROR(pDrvIns, VERR_PDM_MISSING_INTERFACE_ABOVE,
1036	N_("Configuration error: the above device/driver didn't "
1037	"export the network port interface"));
1038	pThis->pConfig =
1039	(PPDMINETWORKCONFIG)pDrvIns->pUpBase->pfnQueryInterface(pDrvIns->pUpBase,
1040	PDMINTERFACE_NETWORK_CONFIG);
1041	if (!pThis->pConfig)
1042	return PDMDRV_SET_ERROR(pDrvIns, VERR_PDM_MISSING_INTERFACE_ABOVE,
1043	N_("Configuration error: the above device/driver didn't "
1044	"export the network config interface"));
1045
1046	/* Generate a network address for this network card. */
1047	char szNetwork[32]; /* xxx.xxx.xxx.xxx/yy */
1048	GET_STRING(rc, pThis, pCfgHandle, "Network", szNetwork[0], sizeof(szNetwork));
1049	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
1050	RTStrPrintf(szNetwork, sizeof(szNetwork), "10.0.%d.0/24", pDrvIns->iInstance + 2);
1051
1052	RTIPV4ADDR Network;
1053	RTIPV4ADDR Netmask;
1054	rc = RTCidrStrToIPv4(szNetwork, &Network, &Netmask);
1055	if (RT_FAILURE(rc))
1056	return PDMDrvHlpVMSetError(pDrvIns, rc, RT_SRC_POS, N_("NAT#%d: Configuration error: "
1057	"network '%s' describes not a valid IPv4 network"),
1058	pDrvIns->iInstance, szNetwork);
1059
1060	char szNetAddr[16];
1061	RTStrPrintf(szNetAddr, sizeof(szNetAddr), "%d.%d.%d.%d",
1062	(Network & 0xFF000000) >> 24, (Network & 0xFF0000) >> 16,
1063	(Network & 0xFF00) >> 8, Network & 0xFF);
1064
1065	/*
1066	* Initialize slirp.
1067	*/
1068	rc = slirp_init(&pThis->pNATState, &szNetAddr[0], Netmask, fPassDomain, !!fUseHostResolver, pThis);
1069	if (RT_SUCCESS(rc))
1070	{
1071	slirp_set_dhcp_TFTP_prefix(pThis->pNATState, pThis->pszTFTPPrefix);
1072	slirp_set_dhcp_TFTP_bootfile(pThis->pNATState, pThis->pszBootFile);
1073	slirp_set_dhcp_next_server(pThis->pNATState, pThis->pszNextServer);
1074	slirp_set_dhcp_dns_proxy(pThis->pNATState, !!fDNSProxy);
1075	#ifdef VBOX_WITH_SLIRP_BSD_MBUF
1076	slirp_set_mtu(pThis->pNATState, MTU);
1077	#endif
1078	char *pszBindIP = NULL;
1079	GET_STRING_ALLOC(rc, pThis, pCfgHandle, "BindIP", pszBindIP);
1080	rc = slirp_set_binding_address(pThis->pNATState, pszBindIP);
1081	if (rc != 0)
1082	LogRel(("NAT: value of BindIP has been ignored\n"));
1083
1084	if(pszBindIP != NULL)
1085	MMR3HeapFree(pszBindIP);
1086	#define SLIRP_SET_TUNING_VALUE(name, setter) \
1087	do \
1088	{ \
1089	int len = 0; \
1090	rc = CFGMR3QueryS32(pCfgHandle, name, &len); \
1091	if (RT_SUCCESS(rc)) \
1092	setter(pThis->pNATState, len); \
1093	} while(0)
1094
1095	SLIRP_SET_TUNING_VALUE("SocketRcvBuf", slirp_set_rcvbuf);
1096	SLIRP_SET_TUNING_VALUE("SocketSndBuf", slirp_set_sndbuf);
1097	SLIRP_SET_TUNING_VALUE("TcpRcvSpace", slirp_set_tcp_rcvspace);
1098	SLIRP_SET_TUNING_VALUE("TcpSndSpace", slirp_set_tcp_sndspace);
1099
1100	slirp_register_statistics(pThis->pNATState, pDrvIns);
1101	#ifdef VBOX_WITH_STATISTICS
1102	# define DRV_PROFILE_COUNTER(name, dsc) REGISTER_COUNTER(name, pThis, STAMTYPE_PROFILE, STAMUNIT_TICKS_PER_CALL, dsc)
1103	# define DRV_COUNTING_COUNTER(name, dsc) REGISTER_COUNTER(name, pThis, STAMTYPE_COUNTER, STAMUNIT_COUNT, dsc)
1104	# include "counters.h"
1105	#endif
1106
1107	int rc2 = drvNATConstructRedir(pDrvIns->iInstance, pThis, pCfgHandle, Network);
1108	if (RT_SUCCESS(rc2))
1109	{
1110	/*
1111	* Register a load done notification to get the MAC address into the slirp
1112	* engine after we loaded a guest state.
1113	*/
1114	rc2 = PDMDrvHlpSSMRegisterLoadDone(pDrvIns, drvNATLoadDone);
1115	AssertRC(rc2);
1116	rc = RTReqCreateQueue(&pThis->pSlirpReqQueue);
1117	if (RT_FAILURE(rc))
1118	{
1119	LogRel(("NAT: Can't create request queue\n"));
1120	return rc;
1121	}
1122
1123
1124	rc = RTReqCreateQueue(&pThis->pRecvReqQueue);
1125	if (RT_FAILURE(rc))
1126	{
1127	LogRel(("NAT: Can't create request queue\n"));
1128	return rc;
1129	}
1130	rc = RTReqCreateQueue(&pThis->pUrgRecvReqQueue);
1131	if (RT_FAILURE(rc))
1132	{
1133	LogRel(("NAT: Can't create request queue\n"));
1134	return rc;
1135	}
1136	rc = PDMDrvHlpPDMThreadCreate(pDrvIns, &pThis->pRecvThread, pThis, drvNATRecv,
1137	drvNATRecvWakeup, 128 * _1K, RTTHREADTYPE_IO, "NATRX");
1138	AssertRC(rc);
1139	rc = RTSemEventCreate(&pThis->EventRecv);
1140
1141	rc = PDMDrvHlpPDMThreadCreate(pDrvIns, &pThis->pUrgRecvThread, pThis, drvNATUrgRecv,
1142	drvNATUrgRecvWakeup, 128 * _1K, RTTHREADTYPE_IO, "NATURGRX");
1143	AssertRC(rc);
1144	rc = RTSemEventCreate(&pThis->EventRecv);
1145	rc = RTSemEventCreate(&pThis->EventUrgRecv);
1146	rc = RTCritSectInit(&pThis->csDevAccess);
1147	rc = PDMDrvHlpTMTimerCreate(pThis->pDrvIns, TMCLOCK_REAL/enmClock/, drvNATSlowTimer,
1148	pThis, TMTIMER_FLAGS_NO_CRIT_SECT/flags/, "NATSlowTmr", &pThis->pTmrSlow);
1149	rc = PDMDrvHlpTMTimerCreate(pThis->pDrvIns, TMCLOCK_REAL/enmClock/, drvNATFastTimer,
1150	pThis, TMTIMER_FLAGS_NO_CRIT_SECT/flags/, "NATFastTmr", &pThis->pTmrFast);
1151
1152	#ifndef RT_OS_WINDOWS
1153	/*
1154	* Create the control pipe.
1155	*/
1156	int fds[2];
1157	if (pipe(&fds[0]) != 0) /** @todo RTPipeCreate() or something... */
1158	{
1159	int rc = RTErrConvertFromErrno(errno);
1160	AssertRC(rc);
1161	return rc;
1162	}
1163	pThis->PipeRead = fds[0];
1164	pThis->PipeWrite = fds[1];
1165	#else
1166	pThis->hWakeupEvent = CreateEvent(NULL, FALSE, FALSE, NULL); /* auto-reset event */
1167	slirp_register_external_event(pThis->pNATState, pThis->hWakeupEvent,
1168	VBOX_WAKEUP_EVENT_INDEX);
1169	#endif
1170
1171	rc = PDMDrvHlpPDMThreadCreate(pDrvIns, &pThis->pSlirpThread, pThis, drvNATAsyncIoThread,
1172	drvNATAsyncIoWakeup, 128 * _1K, RTTHREADTYPE_IO, "NAT");
1173	AssertRC(rc);
1174
1175	#ifdef VBOX_WITH_SLIRP_MT
1176	rc = PDMDrvHlpPDMThreadCreate(pDrvIns, &pThis->pGuestThread, pThis, drvNATAsyncIoGuest,
1177	drvNATAsyncIoGuestWakeup, 128 * _1K, RTTHREADTYPE_IO, "NATGUEST");
1178	AssertRC(rc);
1179	#endif
1180
1181	pThis->enmLinkState = PDMNETWORKLINKSTATE_UP;
1182
1183	/* might return VINF_NAT_DNS */
1184	return rc;
1185	}
1186	/* failure path */
1187	rc = rc2;
1188	slirp_term(pThis->pNATState);
1189	pThis->pNATState = NULL;
1190	}
1191	else
1192	{
1193	PDMDRV_SET_ERROR(pDrvIns, rc, N_("Unknown error during NAT networking setup: "));
1194	AssertMsgFailed(("Add error message for rc=%d (%Rrc)\n", rc, rc));
1195	}
1196
1197	return rc;
1198	}
1199
1200
1201	/**
1202	* NAT network transport driver registration record.
1203	*/
1204	const PDMDRVREG g_DrvNAT =
1205	{
1206	/* u32Version */
1207	PDM_DRVREG_VERSION,
1208	/* szDriverName */
1209	"NAT",
1210	/* pszDescription */
1211	"NAT Network Transport Driver",
1212	/* fFlags */
1213	PDM_DRVREG_FLAGS_HOST_BITS_DEFAULT,
1214	/* fClass. */
1215	PDM_DRVREG_CLASS_NETWORK,
1216	/* cMaxInstances */
1217	16,
1218	/* cbInstance */
1219	sizeof(DRVNAT),
1220	/* pfnConstruct */
1221	drvNATConstruct,
1222	/* pfnDestruct */
1223	drvNATDestruct,
1224	/* pfnIOCtl */
1225	NULL,
1226	/* pfnPowerOn */
1227	drvNATPowerOn,
1228	/* pfnReset */
1229	NULL,
1230	/* pfnSuspend */
1231	NULL,
1232	/* pfnResume */
1233	NULL,
1234	/* pfnAttach */
1235	NULL,
1236	/* pfnDetach */
1237	NULL,
1238	/* pfnPowerOff */
1239	NULL,
1240	/* pfnSoftReset */
1241	NULL,
1242	/* u32EndVersion */
1243	PDM_DRVREG_VERSION
1244	};
1245

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source: vbox/trunk/src/VBox/Devices/Network/DrvNAT.cpp@ 25125

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