DrvNAT.cpp@ 26495

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1	/* $Id: DrvNAT.cpp 26495 2010-02-14 07:59:48Z vboxsync $ */
2	/** @file
3	* DrvNAT - NAT network transport driver.
4	*/
5
6	/*
7	* Copyright (C) 2006-2010 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 <VBox/pdmnetifs.h>
33	#include <iprt/assert.h>
34	#include <iprt/file.h>
35	#include <iprt/mem.h>
36	#include <iprt/string.h>
37	#include <iprt/critsect.h>
38	#include <iprt/cidr.h>
39	#include <iprt/stream.h>
40	#include <iprt/uuid.h>
41
42	#include "Builtins.h"
43
44	#ifndef RT_OS_WINDOWS
45	# include <unistd.h>
46	# include <fcntl.h>
47	# include <poll.h>
48	# include <errno.h>
49	#endif
50	#ifdef RT_OS_FREEBSD
51	# include <netinet/in.h>
52	#endif
53	#include <iprt/semaphore.h>
54	#include <iprt/req.h>
55
56	#define COUNTERS_INIT
57	#include "counters.h"
58
59
60	/*******************************************************************************
61	* Defined Constants And Macros *
62	*******************************************************************************/
63	#define GET_EXTRADATA(pthis, node, name, rc, type, type_name, var) \
64	do { \
65	(rc) = CFGMR3Query ## type((node), name, &(var)); \
66	if (RT_FAILURE((rc)) && (rc) != VERR_CFGM_VALUE_NOT_FOUND) \
67	return PDMDrvHlpVMSetError((pthis)->pDrvIns, (rc), RT_SRC_POS, N_("NAT#%d: configuration query for \""name"\" " #type_name " failed"), \
68	(pthis)->pDrvIns->iInstance); \
69	} while (0)
70
71	#define GET_ED_STRICT(pthis, node, name, rc, type, type_name, var) \
72	do { \
73	(rc) = CFGMR3Query ## type((node), name, &(var)); \
74	if (RT_FAILURE((rc))) \
75	return PDMDrvHlpVMSetError((pthis)->pDrvIns, (rc), RT_SRC_POS, N_("NAT#%d: configuration query for \""name"\" " #type_name " failed"), \
76	(pthis)->pDrvIns->iInstance); \
77	} while (0)
78
79	#define GET_EXTRADATA_N(pthis, node, name, rc, type, type_name, var, var_size) \
80	do { \
81	(rc) = CFGMR3Query ## type((node), name, &(var), var_size); \
82	if (RT_FAILURE((rc)) && (rc) != VERR_CFGM_VALUE_NOT_FOUND) \
83	return PDMDrvHlpVMSetError((pthis)->pDrvIns, (rc), RT_SRC_POS, N_("NAT#%d: configuration query for \""name"\" " #type_name " failed"), \
84	(pthis)->pDrvIns->iInstance); \
85	} while (0)
86
87	#define GET_BOOL(rc, pthis, node, name, var) \
88	GET_EXTRADATA(pthis, node, name, (rc), Bool, bolean, (var))
89	#define GET_STRING(rc, pthis, node, name, var, var_size) \
90	GET_EXTRADATA_N(pthis, node, name, (rc), String, string, (var), (var_size))
91	#define GET_STRING_ALLOC(rc, pthis, node, name, var) \
92	GET_EXTRADATA(pthis, node, name, (rc), StringAlloc, string, (var))
93	#define GET_S32(rc, pthis, node, name, var) \
94	GET_EXTRADATA(pthis, node, name, (rc), S32, int, (var))
95	#define GET_S32_STRICT(rc, pthis, node, name, var) \
96	GET_ED_STRICT(pthis, node, name, (rc), S32, int, (var))
97
98
99
100	#define DO_GET_IP(rc, node, instance, status, x) \
101	do { \
102	char sz##x[32]; \
103	GET_STRING((rc), (node), (instance), #x, sz ## x[0], sizeof(sz ## x)); \
104	if (rc != VERR_CFGM_VALUE_NOT_FOUND) \
105	(status) = inet_aton(sz ## x, &x); \
106	} while (0)
107
108	#define GETIP_DEF(rc, node, instance, x, def) \
109	do \
110	{ \
111	int status = 0; \
112	DO_GET_IP((rc), (node), (instance), status, x); \
113	if (status == 0 \|\| rc == VERR_CFGM_VALUE_NOT_FOUND) \
114	x.s_addr = def; \
115	} while (0)
116
117	/*******************************************************************************
118	* Structures and Typedefs *
119	*******************************************************************************/
120	/**
121	* NAT network transport driver instance data.
122	*
123	* @implements PDMINETWORKUP
124	*/
125	typedef struct DRVNAT
126	{
127	/** The network interface. */
128	PDMINETWORKUP INetworkUp;
129	/** The port we're attached to. */
130	PPDMINETWORKDOWN pIAboveNet;
131	/** The network config of the port we're attached to. */
132	PPDMINETWORKCONFIG pIAboveConfig;
133	/** Pointer to the driver instance. */
134	PPDMDRVINS pDrvIns;
135	/** Link state */
136	PDMNETWORKLINKSTATE enmLinkState;
137	/** NAT state for this instance. */
138	PNATState pNATState;
139	/** TFTP directory prefix. */
140	char *pszTFTPPrefix;
141	/** Boot file name to provide in the DHCP server response. */
142	char *pszBootFile;
143	/** tftp server name to provide in the DHCP server response. */
144	char *pszNextServer;
145	/* polling thread */
146	PPDMTHREAD pSlirpThread;
147	/** Queue for NAT-thread-external events. */
148	PRTREQQUEUE pSlirpReqQueue;
149	/** The guest IP for port-forwarding. */
150	uint32_t GuestIP;
151	uint32_t alignment1;
152
153	#ifdef VBOX_WITH_SLIRP_MT
154	PPDMTHREAD pGuestThread;
155	#endif
156	#ifndef RT_OS_WINDOWS
157	/** The write end of the control pipe. */
158	RTFILE PipeWrite;
159	/** The read end of the control pipe. */
160	RTFILE PipeRead;
161	# if HC_ARCH_BITS == 32
162	/** Alignment padding. */
163	//uint32_t alignment2;
164	# endif
165	#else
166	/** for external notification */
167	HANDLE hWakeupEvent;
168	#endif
169
170	#define DRV_PROFILE_COUNTER(name, dsc) STAMPROFILE Stat ## name
171	#define DRV_COUNTING_COUNTER(name, dsc) STAMCOUNTER Stat ## name
172	#include "counters.h"
173	/** thread delivering packets for receiving by the guest */
174	PPDMTHREAD pRecvThread;
175	/** thread delivering urg packets for receiving by the guest */
176	PPDMTHREAD pUrgRecvThread;
177	/** event to wakeup the guest receive thread */
178	RTSEMEVENT EventRecv;
179	/** event to wakeup the guest urgent receive thread */
180	RTSEMEVENT EventUrgRecv;
181	/** Receive Req queue (deliver packets to the guest) */
182	PRTREQQUEUE pRecvReqQueue;
183	/** Receive Urgent Req queue (deliver packets to the guest) */
184	PRTREQQUEUE pUrgRecvReqQueue;
185
186	/* makes access to device func RecvAvail and Recv atomical */
187	RTCRITSECT csDevAccess;
188	volatile uint32_t cUrgPkt;
189	volatile uint32_t cPkt;
190	PTMTIMERR3 pTmrSlow;
191	PTMTIMERR3 pTmrFast;
192	} DRVNAT;
193	AssertCompileMemberAlignment(DRVNAT, StatNATRecvWakeups, 8);
194	/** Pointer the NAT driver instance data. */
195	typedef DRVNAT *PDRVNAT;
196
197	/**
198	* NAT queue item.
199	*/
200	typedef struct DRVNATQUEUITEM
201	{
202	/** The core part owned by the queue manager. */
203	PDMQUEUEITEMCORE Core;
204	/** The buffer for output to guest. */
205	const uint8_t *pu8Buf;
206	/* size of buffer */
207	size_t cb;
208	void *mbuf;
209	} DRVNATQUEUITEM;
210	/** Pointer to a NAT queue item. */
211	typedef DRVNATQUEUITEM *PDRVNATQUEUITEM;
212
213
214	static void drvNATNotifyNATThread(PDRVNAT pThis);
215	static DECLCALLBACK(void) drvNATSlowTimer(PPDMDRVINS pDrvIns, PTMTIMER pTimer, void *pvUser);
216	static DECLCALLBACK(void) drvNATFast(PPDMDRVINS pDrvIns, PTMTIMER pTimer, void *pvUser);
217
218
219	/** Converts a pointer to NAT::INetworkUp to a PRDVNAT. */
220	#define PDMINETWORKUP_2_DRVNAT(pInterface) ( (PDRVNAT)((uintptr_t)pInterface - RT_OFFSETOF(DRVNAT, INetworkUp)) )
221
222	static DECLCALLBACK(void) drvNATSlowTimer(PPDMDRVINS pDrvIns, PTMTIMER pTimer, void *pvUser)
223	{
224	Assert(pvUser);
225	PDRVNAT pThis = (PDRVNAT)pvUser;
226	drvNATNotifyNATThread(pThis);
227	}
228
229	static DECLCALLBACK(void) drvNATFastTimer(PPDMDRVINS pDrvIns, PTMTIMER pTimer, void *pvUser)
230	{
231	Assert(pvUser);
232	PDRVNAT pThis = (PDRVNAT)pvUser;
233	drvNATNotifyNATThread(pThis);
234	}
235
236
237	static DECLCALLBACK(int) drvNATRecv(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
238	{
239	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
240
241	if (pThread->enmState == PDMTHREADSTATE_INITIALIZING)
242	return VINF_SUCCESS;
243
244	while (pThread->enmState == PDMTHREADSTATE_RUNNING)
245	{
246	RTReqProcess(pThis->pRecvReqQueue, 0);
247	if (ASMAtomicReadU32(&pThis->cPkt) == 0)
248	RTSemEventWait(pThis->EventRecv, RT_INDEFINITE_WAIT);
249	}
250	return VINF_SUCCESS;
251	}
252
253
254	static DECLCALLBACK(int) drvNATRecvWakeup(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
255	{
256	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
257	int rc;
258	rc = RTSemEventSignal(pThis->EventRecv);
259
260	STAM_COUNTER_INC(&pThis->StatNATRecvWakeups);
261	return VINF_SUCCESS;
262	}
263
264	static DECLCALLBACK(int) drvNATUrgRecv(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
265	{
266	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
267
268	if (pThread->enmState == PDMTHREADSTATE_INITIALIZING)
269	return VINF_SUCCESS;
270
271	while (pThread->enmState == PDMTHREADSTATE_RUNNING)
272	{
273	RTReqProcess(pThis->pUrgRecvReqQueue, 0);
274	if (ASMAtomicReadU32(&pThis->cUrgPkt) == 0)
275	{
276	int rc = RTSemEventWait(pThis->EventUrgRecv, RT_INDEFINITE_WAIT);
277	AssertRC(rc);
278	}
279	}
280	return VINF_SUCCESS;
281	}
282	static DECLCALLBACK(int) drvNATUrgRecvWakeup(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
283	{
284	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
285	int rc = RTSemEventSignal(pThis->EventUrgRecv);
286	AssertRC(rc);
287
288	return VINF_SUCCESS;
289	}
290
291	static DECLCALLBACK(void) drvNATUrgRecvWorker(PDRVNAT pThis, uint8_t pu8Buf, int cb, void pvArg)
292	{
293	int rc = RTCritSectEnter(&pThis->csDevAccess);
294	AssertRC(rc);
295	rc = pThis->pIAboveNet->pfnWaitReceiveAvail(pThis->pIAboveNet, RT_INDEFINITE_WAIT);
296	if (RT_SUCCESS(rc))
297	{
298	rc = pThis->pIAboveNet->pfnReceive(pThis->pIAboveNet, pu8Buf, cb);
299	AssertRC(rc);
300	}
301	else if ( RT_FAILURE(rc)
302	&& ( rc == VERR_TIMEOUT
303	&& rc == VERR_INTERRUPTED))
304	{
305	AssertRC(rc);
306	}
307
308	rc = RTCritSectLeave(&pThis->csDevAccess);
309	AssertRC(rc);
310
311	slirp_ext_m_free(pThis->pNATState, pvArg);
312	#ifdef VBOX_WITH_SLIRP_BSD_MBUF
313	RTMemFree(pu8Buf);
314	#endif
315	if (ASMAtomicDecU32(&pThis->cUrgPkt) == 0)
316	{
317	drvNATRecvWakeup(pThis->pDrvIns, pThis->pRecvThread);
318	drvNATNotifyNATThread(pThis);
319	}
320	}
321
322
323	static DECLCALLBACK(void) drvNATRecvWorker(PDRVNAT pThis, uint8_t pu8Buf, int cb, void pvArg)
324	{
325	int rc;
326	STAM_PROFILE_START(&pThis->StatNATRecv, a);
327
328	STAM_PROFILE_START(&pThis->StatNATRecvWait, b);
329
330	while(ASMAtomicReadU32(&pThis->cUrgPkt) != 0)
331	{
332	rc = RTSemEventWait(pThis->EventRecv, RT_INDEFINITE_WAIT);
333	if ( RT_FAILURE(rc)
334	&& ( rc == VERR_TIMEOUT
335	\|\| rc == VERR_INTERRUPTED))
336	goto done_unlocked;
337	}
338
339	rc = RTCritSectEnter(&pThis->csDevAccess);
340	AssertRC(rc);
341
342	rc = pThis->pIAboveNet->pfnWaitReceiveAvail(pThis->pIAboveNet, RT_INDEFINITE_WAIT);
343	if (RT_SUCCESS(rc))
344	{
345	rc = pThis->pIAboveNet->pfnReceive(pThis->pIAboveNet, pu8Buf, cb);
346	AssertRC(rc);
347	}
348	else if ( RT_FAILURE(rc)
349	&& ( rc != VERR_TIMEOUT
350	&& rc != VERR_INTERRUPTED))
351	{
352	AssertRC(rc);
353	}
354
355	rc = RTCritSectLeave(&pThis->csDevAccess);
356	AssertRC(rc);
357
358	done_unlocked:
359	slirp_ext_m_free(pThis->pNATState, pvArg);
360	#ifdef VBOX_WITH_SLIRP_BSD_MBUF
361	RTMemFree(pu8Buf);
362	#endif
363	ASMAtomicDecU32(&pThis->cPkt);
364
365	drvNATNotifyNATThread(pThis);
366
367	STAM_PROFILE_STOP(&pThis->StatNATRecvWait, b);
368	STAM_PROFILE_STOP(&pThis->StatNATRecv, a);
369	}
370
371	/**
372	* Worker function for drvNATSend().
373	* @thread "NAT" thread.
374	*/
375	static void drvNATSendWorker(PDRVNAT pThis, void *pvBuf, size_t cb)
376	{
377	Assert(pThis->enmLinkState == PDMNETWORKLINKSTATE_UP);
378	if (pThis->enmLinkState == PDMNETWORKLINKSTATE_UP)
379	slirp_input(pThis->pNATState, (uint8_t *)pvBuf);
380	}
381
382
383	/**
384	* @interface_method_impl{PDMINETWORKUP,pfnSendDeprecated}
385	*/
386	static DECLCALLBACK(int) drvNATSendDeprecated(PPDMINETWORKUP pInterface, const void *pvBuf, size_t cb)
387	{
388	PDRVNAT pThis = PDMINETWORKUP_2_DRVNAT(pInterface);
389
390	LogFlow(("drvNATSend: pvBuf=%p cb=%#x\n", pvBuf, cb));
391	Log2(("drvNATSend: pvBuf=%p cb=%#x\n%.*Rhxd\n", pvBuf, cb, cb, pvBuf));
392
393	PRTREQ pReq = NULL;
394	int rc;
395	void *buf;
396
397	/* don't queue new requests when the NAT thread is about to stop */
398	if (pThis->pSlirpThread->enmState != PDMTHREADSTATE_RUNNING)
399	return VINF_SUCCESS;
400
401	#ifndef VBOX_WITH_SLIRP_MT
402	rc = RTReqAlloc(pThis->pSlirpReqQueue, &pReq, RTREQTYPE_INTERNAL);
403	#else
404	rc = RTReqAlloc((PRTREQQUEUE)slirp_get_queue(pThis->pNATState), &pReq, RTREQTYPE_INTERNAL);
405	#endif
406	AssertRC(rc);
407
408	/* @todo: Here we should get mbuf instead temporal buffer */
409	#ifndef VBOX_WITH_SLIRP_BSD_MBUF
410	void *pvmBuf = slirp_ext_m_get(pThis->pNATState);
411	Assert(pvmBuf);
412	slirp_ext_m_append(pThis->pNATState, pvmBuf, (uint8_t *)pvBuf, cb);
413	#else
414	void pvmBuf = slirp_ext_m_get(pThis->pNATState, (uint8_t )pvBuf, cb);
415	Assert(pvmBuf);
416	#endif
417
418	pReq->u.Internal.pfn = (PFNRT)drvNATSendWorker;
419	pReq->u.Internal.cArgs = 2;
420	pReq->u.Internal.aArgs[0] = (uintptr_t)pThis;
421	pReq->u.Internal.aArgs[1] = (uintptr_t)pvmBuf;
422	pReq->fFlags = RTREQFLAGS_VOID\|RTREQFLAGS_NO_WAIT;
423
424	rc = RTReqQueue(pReq, 0); /* don't wait, we have to wakeup the NAT thread fist */
425	AssertRC(rc);
426	drvNATNotifyNATThread(pThis);
427	LogFlow(("drvNATSend: end\n"));
428	return VINF_SUCCESS;
429	}
430
431
432	/**
433	* Get the NAT thread out of poll/WSAWaitForMultipleEvents
434	*/
435	static void drvNATNotifyNATThread(PDRVNAT pThis)
436	{
437	int rc;
438	#ifndef RT_OS_WINDOWS
439	/* kick select() */
440	rc = RTFileWrite(pThis->PipeWrite, "", 1, NULL);
441	#else
442	/* kick WSAWaitForMultipleEvents */
443	rc = WSASetEvent(pThis->hWakeupEvent);
444	#endif
445	AssertRC(rc);
446	}
447
448
449	/**
450	* @interface_method_impl{PDMINETWORKUP,pfnSetPromiscuousMode}
451	*/
452	static DECLCALLBACK(void) drvNATSetPromiscuousMode(PPDMINETWORKUP pInterface, bool fPromiscuous)
453	{
454	LogFlow(("drvNATSetPromiscuousMode: fPromiscuous=%d\n", fPromiscuous));
455	/* nothing to do */
456	}
457
458	/**
459	* Worker function for drvNATNotifyLinkChanged().
460	* @thread "NAT" thread.
461	*/
462	static void drvNATNotifyLinkChangedWorker(PDRVNAT pThis, PDMNETWORKLINKSTATE enmLinkState)
463	{
464	pThis->enmLinkState = enmLinkState;
465
466	switch (enmLinkState)
467	{
468	case PDMNETWORKLINKSTATE_UP:
469	LogRel(("NAT: link up\n"));
470	slirp_link_up(pThis->pNATState);
471	break;
472
473	case PDMNETWORKLINKSTATE_DOWN:
474	case PDMNETWORKLINKSTATE_DOWN_RESUME:
475	LogRel(("NAT: link down\n"));
476	slirp_link_down(pThis->pNATState);
477	break;
478
479	default:
480	AssertMsgFailed(("drvNATNotifyLinkChanged: unexpected link state %d\n", enmLinkState));
481	}
482	}
483
484
485	/**
486	* Notification on link status changes.
487	*
488	* @param pInterface Pointer to the interface structure containing the called function pointer.
489	* @param enmLinkState The new link state.
490	* @thread EMT
491	*/
492	static DECLCALLBACK(void) drvNATNotifyLinkChanged(PPDMINETWORKUP pInterface, PDMNETWORKLINKSTATE enmLinkState)
493	{
494	PDRVNAT pThis = PDMINETWORKUP_2_DRVNAT(pInterface);
495
496	LogFlow(("drvNATNotifyLinkChanged: enmLinkState=%d\n", enmLinkState));
497
498	PRTREQ pReq = NULL;
499
500	/* don't queue new requests when the NAT thread is about to stop */
501	if (pThis->pSlirpThread->enmState != PDMTHREADSTATE_RUNNING)
502	return;
503
504	int rc = RTReqAlloc(pThis->pSlirpReqQueue, &pReq, RTREQTYPE_INTERNAL);
505	AssertRC(rc);
506	pReq->u.Internal.pfn = (PFNRT)drvNATNotifyLinkChangedWorker;
507	pReq->u.Internal.cArgs = 2;
508	pReq->u.Internal.aArgs[0] = (uintptr_t)pThis;
509	pReq->u.Internal.aArgs[1] = (uintptr_t)enmLinkState;
510	pReq->fFlags = RTREQFLAGS_VOID;
511	rc = RTReqQueue(pReq, 0); /* don't wait, we have to wakeup the NAT thread fist */
512	if (RT_LIKELY(rc == VERR_TIMEOUT))
513	{
514	drvNATNotifyNATThread(pThis);
515	rc = RTReqWait(pReq, RT_INDEFINITE_WAIT);
516	AssertRC(rc);
517	}
518	else
519	AssertRC(rc);
520	RTReqFree(pReq);
521	}
522
523	/**
524	* NAT thread handling the slirp stuff. The slirp implementation is single-threaded
525	* so we execute this enginre in a dedicated thread. We take care that this thread
526	* does not become the bottleneck: If the guest wants to send, a request is enqueued
527	* into the pSlirpReqQueue and handled asynchronously by this thread. If this thread
528	* wants to deliver packets to the guest, it enqueues a request into pRecvReqQueue
529	* which is later handled by the Recv thread.
530	*/
531	static DECLCALLBACK(int) drvNATAsyncIoThread(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
532	{
533	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
534	int nFDs = -1;
535	int ms;
536	#ifdef RT_OS_WINDOWS
537	DWORD event;
538	HANDLE *phEvents;
539	unsigned int cBreak = 0;
540	#else /* RT_OS_WINDOWS */
541	struct pollfd *polls = NULL;
542	unsigned int cPollNegRet = 0;
543	#endif /* !RT_OS_WINDOWS */
544
545	LogFlow(("drvNATAsyncIoThread: pThis=%p\n", pThis));
546
547	if (pThread->enmState == PDMTHREADSTATE_INITIALIZING)
548	return VINF_SUCCESS;
549
550	#ifdef RT_OS_WINDOWS
551	phEvents = slirp_get_events(pThis->pNATState);
552	#endif /* RT_OS_WINDOWS */
553
554	/*
555	* Polling loop.
556	*/
557	while (pThread->enmState == PDMTHREADSTATE_RUNNING)
558	{
559	nFDs = -1;
560	/*
561	* To prevent concurent execution of sending/receving threads
562	*/
563	#ifndef RT_OS_WINDOWS
564	nFDs = slirp_get_nsock(pThis->pNATState);
565	polls = NULL;
566	/* allocation for all sockets + Management pipe */
567	polls = (struct pollfd )RTMemAlloc((1 + nFDs) sizeof(struct pollfd) + sizeof(uint32_t));
568	if (polls == NULL)
569	return VERR_NO_MEMORY;
570
571	/* don't pass the managemant pipe */
572	slirp_select_fill(pThis->pNATState, &nFDs, &polls[1]);
573	#if 0
574	ms = slirp_get_timeout_ms(pThis->pNATState);
575	#else
576	ms = 0;
577	#endif
578
579	polls[0].fd = pThis->PipeRead;
580	/* POLLRDBAND usually doesn't used on Linux but seems used on Solaris */
581	polls[0].events = POLLRDNORM\|POLLPRI\|POLLRDBAND;
582	polls[0].revents = 0;
583
584	int cChangedFDs = poll(polls, nFDs + 1, ms ? ms : -1);
585	if (cChangedFDs < 0)
586	{
587	if (errno == EINTR)
588	{
589	Log2(("NAT: signal was caught while sleep on poll\n"));
590	/* No error, just process all outstanding requests but don't wait */
591	cChangedFDs = 0;
592	}
593	else if (cPollNegRet++ > 128)
594	{
595	LogRel(("NAT:Poll returns (%s) suppressed %d\n", strerror(errno), cPollNegRet));
596	cPollNegRet = 0;
597	}
598	}
599
600	if (cChangedFDs >= 0)
601	{
602	slirp_select_poll(pThis->pNATState, &polls[1], nFDs);
603	if (polls[0].revents & (POLLRDNORM\|POLLPRI\|POLLRDBAND))
604	{
605	/* drain the pipe */
606	char ch[1];
607	size_t cbRead;
608	int counter = 0;
609	/*
610	* drvNATSend decoupled so we don't know how many times
611	* device's thread sends before we've entered multiplex,
612	* so to avoid false alarm drain pipe here to the very end
613	*
614	* @todo: Probably we should counter drvNATSend to count how
615	* deep pipe has been filed before drain.
616	*
617	* XXX:Make it reading exactly we need to drain the pipe.
618	*/
619	RTFileRead(pThis->PipeRead, &ch, 1, &cbRead);
620	}
621	}
622	/* process _all_ outstanding requests but don't wait */
623	RTReqProcess(pThis->pSlirpReqQueue, 0);
624	RTMemFree(polls);
625	#else /* RT_OS_WINDOWS */
626	slirp_select_fill(pThis->pNATState, &nFDs);
627	#if 0
628	ms = slirp_get_timeout_ms(pThis->pNATState);
629	#else
630	ms = 0;
631	#endif
632	struct timeval tv = { 0, ms*1000 };
633	event = WSAWaitForMultipleEvents(nFDs, phEvents, FALSE, ms ? ms : WSA_INFINITE, FALSE);
634	if ( (event < WSA_WAIT_EVENT_0 \|\| event > WSA_WAIT_EVENT_0 + nFDs - 1)
635	&& event != WSA_WAIT_TIMEOUT)
636	{
637	int error = WSAGetLastError();
638	LogRel(("NAT: WSAWaitForMultipleEvents returned %d (error %d)\n", event, error));
639	RTAssertPanic();
640	}
641
642	if (event == WSA_WAIT_TIMEOUT)
643	{
644	/* only check for slow/fast timers */
645	slirp_select_poll(pThis->pNATState, /* fTimeout=/true, /fIcmp=*/false);
646	continue;
647	}
648	/* poll the sockets in any case */
649	Log2(("%s: poll\n", __FUNCTION__));
650	slirp_select_poll(pThis->pNATState, /* fTimeout=/false, / fIcmp=*/(event == WSA_WAIT_EVENT_0));
651	/* process _all_ outstanding requests but don't wait */
652	RTReqProcess(pThis->pSlirpReqQueue, 0);
653	# ifdef VBOX_NAT_DELAY_HACK
654	if (cBreak++ > 128)
655	{
656	cBreak = 0;
657	RTThreadSleep(2);
658	}
659	# endif
660	#endif /* RT_OS_WINDOWS */
661	}
662
663	return VINF_SUCCESS;
664	}
665
666
667	/**
668	* Unblock the send thread so it can respond to a state change.
669	*
670	* @returns VBox status code.
671	* @param pDevIns The pcnet device instance.
672	* @param pThread The send thread.
673	*/
674	static DECLCALLBACK(int) drvNATAsyncIoWakeup(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
675	{
676	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
677
678	drvNATNotifyNATThread(pThis);
679	return VINF_SUCCESS;
680	}
681
682	#ifdef VBOX_WITH_SLIRP_MT
683
684	static DECLCALLBACK(int) drvNATAsyncIoGuest(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
685	{
686	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
687
688	if (pThread->enmState == PDMTHREADSTATE_INITIALIZING)
689	return VINF_SUCCESS;
690
691	while (pThread->enmState == PDMTHREADSTATE_RUNNING)
692	slirp_process_queue(pThis->pNATState);
693
694	return VINF_SUCCESS;
695	}
696
697
698	static DECLCALLBACK(int) drvNATAsyncIoGuestWakeup(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
699	{
700	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
701
702	return VINF_SUCCESS;
703	}
704
705	#endif /* VBOX_WITH_SLIRP_MT */
706
707	void slirp_arm_fast_timer(void *pvUser)
708	{
709	PDRVNAT pThis = (PDRVNAT)pvUser;
710	Assert(pThis);
711	TMTimerSetMillies(pThis->pTmrFast, 2);
712	}
713
714	void slirp_arm_slow_timer(void *pvUser)
715	{
716	PDRVNAT pThis = (PDRVNAT)pvUser;
717	Assert(pThis);
718	TMTimerSetMillies(pThis->pTmrSlow, 500);
719	}
720
721	/**
722	* Function called by slirp to check if it's possible to feed incoming data to the network port.
723	* @returns 1 if possible.
724	* @returns 0 if not possible.
725	*/
726	int slirp_can_output(void *pvUser)
727	{
728	return 1;
729	}
730
731	void slirp_push_recv_thread(void *pvUser)
732	{
733	PDRVNAT pThis = (PDRVNAT)pvUser;
734	Assert(pThis);
735	drvNATUrgRecvWakeup(pThis->pDrvIns, pThis->pUrgRecvThread);
736	}
737
738	void slirp_urg_output(void pvUser, void pvArg, const uint8_t *pu8Buf, int cb)
739	{
740	PDRVNAT pThis = (PDRVNAT)pvUser;
741	Assert(pThis);
742
743	PRTREQ pReq = NULL;
744
745	/* don't queue new requests when the NAT thread is about to stop */
746	if (pThis->pSlirpThread->enmState != PDMTHREADSTATE_RUNNING)
747	return;
748
749	int rc = RTReqAlloc(pThis->pUrgRecvReqQueue, &pReq, RTREQTYPE_INTERNAL);
750	AssertRC(rc);
751	ASMAtomicIncU32(&pThis->cUrgPkt);
752	pReq->u.Internal.pfn = (PFNRT)drvNATUrgRecvWorker;
753	pReq->u.Internal.cArgs = 4;
754	pReq->u.Internal.aArgs[0] = (uintptr_t)pThis;
755	pReq->u.Internal.aArgs[1] = (uintptr_t)pu8Buf;
756	pReq->u.Internal.aArgs[2] = (uintptr_t)cb;
757	pReq->u.Internal.aArgs[3] = (uintptr_t)pvArg;
758	pReq->fFlags = RTREQFLAGS_VOID\|RTREQFLAGS_NO_WAIT;
759	rc = RTReqQueue(pReq, 0);
760	AssertRC(rc);
761	drvNATUrgRecvWakeup(pThis->pDrvIns, pThis->pUrgRecvThread);
762	}
763
764	/**
765	* Function called by slirp to feed incoming data to the network port.
766	*/
767	void slirp_output(void pvUser, void pvArg, const uint8_t *pu8Buf, int cb)
768	{
769	PDRVNAT pThis = (PDRVNAT)pvUser;
770	Assert(pThis);
771
772	LogFlow(("slirp_output BEGIN %x %d\n", pu8Buf, cb));
773	Log2(("slirp_output: pu8Buf=%p cb=%#x (pThis=%p)\n%.*Rhxd\n", pu8Buf, cb, pThis, cb, pu8Buf));
774
775	PRTREQ pReq = NULL;
776
777	/* don't queue new requests when the NAT thread is about to stop */
778	if (pThis->pSlirpThread->enmState != PDMTHREADSTATE_RUNNING)
779	return;
780
781	int rc = RTReqAlloc(pThis->pRecvReqQueue, &pReq, RTREQTYPE_INTERNAL);
782	AssertRC(rc);
783	ASMAtomicIncU32(&pThis->cPkt);
784	pReq->u.Internal.pfn = (PFNRT)drvNATRecvWorker;
785	pReq->u.Internal.cArgs = 4;
786	pReq->u.Internal.aArgs[0] = (uintptr_t)pThis;
787	pReq->u.Internal.aArgs[1] = (uintptr_t)pu8Buf;
788	pReq->u.Internal.aArgs[2] = (uintptr_t)cb;
789	pReq->u.Internal.aArgs[3] = (uintptr_t)pvArg;
790	pReq->fFlags = RTREQFLAGS_VOID\|RTREQFLAGS_NO_WAIT;
791	rc = RTReqQueue(pReq, 0);
792	AssertRC(rc);
793	drvNATRecvWakeup(pThis->pDrvIns, pThis->pRecvThread);
794	STAM_COUNTER_INC(&pThis->StatQueuePktSent);
795	}
796
797
798	/**
799	* @interface_method_impl{PDMIBASE,pfnQueryInterface}
800	*/
801	static DECLCALLBACK(void ) drvNATQueryInterface(PPDMIBASE pInterface, const char pszIID)
802	{
803	PPDMDRVINS pDrvIns = PDMIBASE_2_PDMDRV(pInterface);
804	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
805
806	PDMIBASE_RETURN_INTERFACE(pszIID, PDMIBASE, &pDrvIns->IBase);
807	PDMIBASE_RETURN_INTERFACE(pszIID, PDMINETWORKUP, &pThis->INetworkUp);
808	return NULL;
809	}
810
811
812	/**
813	* Get the MAC address into the slirp stack.
814	*
815	* Called by drvNATLoadDone and drvNATPowerOn.
816	*/
817	static void drvNATSetMac(PDRVNAT pThis)
818	{
819	if (pThis->pIAboveConfig)
820	{
821	RTMAC Mac;
822	pThis->pIAboveConfig->pfnGetMac(pThis->pIAboveConfig, &Mac);
823	/* Re-activate the port forwarding. If */
824	slirp_set_ethaddr_and_activate_port_forwarding(pThis->pNATState, Mac.au8, pThis->GuestIP);
825	}
826	}
827
828
829	/**
830	* After loading we have to pass the MAC address of the ethernet device to the slirp stack.
831	* Otherwise the guest is not reachable until it performs a DHCP request or an ARP request
832	* (usually done during guest boot).
833	*/
834	static DECLCALLBACK(int) drvNATLoadDone(PPDMDRVINS pDrvIns, PSSMHANDLE pSSMHandle)
835	{
836	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
837	drvNATSetMac(pThis);
838	return VINF_SUCCESS;
839	}
840
841
842	/**
843	* Some guests might not use DHCP to retrieve an IP but use a static IP.
844	*/
845	static DECLCALLBACK(void) drvNATPowerOn(PPDMDRVINS pDrvIns)
846	{
847	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
848	drvNATSetMac(pThis);
849	}
850
851
852	/**
853	* Sets up the redirectors.
854	*
855	* @returns VBox status code.
856	* @param pCfg The configuration handle.
857	*/
858	static int drvNATConstructRedir(unsigned iInstance, PDRVNAT pThis, PCFGMNODE pCfg, RTIPV4ADDR Network)
859	{
860	RTMAC Mac;
861	memset(&Mac, 0, sizeof(RTMAC)); /can't get MAC here /
862	/*
863	* Enumerate redirections.
864	*/
865	for (PCFGMNODE pNode = CFGMR3GetFirstChild(pCfg); pNode; pNode = CFGMR3GetNextChild(pNode))
866	{
867	/*
868	* Validate the port forwarding config.
869	*/
870	if (!CFGMR3AreValuesValid(pNode, "Protocol\0UDP\0HostPort\0GuestPort\0GuestIP\0BindIP\0"))
871	return PDMDRV_SET_ERROR(pThis->pDrvIns, VERR_PDM_DRVINS_UNKNOWN_CFG_VALUES, N_("Unknown configuration in port forwarding"));
872
873	/* protocol type */
874	bool fUDP;
875	char szProtocol[32];
876	int rc;
877	GET_STRING(rc, pThis, pNode, "Protocol", szProtocol[0], sizeof(szProtocol));
878	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
879	{
880	fUDP = false;
881	GET_BOOL(rc, pThis, pNode, "UDP", fUDP);
882	}
883	else if (RT_SUCCESS(rc))
884	{
885	if (!RTStrICmp(szProtocol, "TCP"))
886	fUDP = false;
887	else if (!RTStrICmp(szProtocol, "UDP"))
888	fUDP = true;
889	else
890	return PDMDrvHlpVMSetError(pThis->pDrvIns, VERR_INVALID_PARAMETER, RT_SRC_POS,
891	N_("NAT#%d: Invalid configuration value for \"Protocol\": \"%s\""),
892	iInstance, szProtocol);
893	}
894	/* host port */
895	int32_t iHostPort;
896	GET_S32_STRICT(rc, pThis, pNode, "HostPort", iHostPort);
897
898	/* guest port */
899	int32_t iGuestPort;
900	GET_S32_STRICT(rc, pThis, pNode, "GuestPort", iGuestPort);
901
902	/* guest address */
903	struct in_addr GuestIP;
904	/* @todo (vvl) use CTL_* */
905	GETIP_DEF(rc, pThis, pNode, GuestIP, htonl(Network \| CTL_GUEST));
906
907	/* Store the guest IP for re-establishing the port-forwarding rules. Note that GuestIP
908	* is not documented. Without */
909	if (pThis->GuestIP == INADDR_ANY)
910	pThis->GuestIP = GuestIP.s_addr;
911
912	/*
913	* Call slirp about it.
914	*/
915	struct in_addr BindIP;
916	GETIP_DEF(rc, pThis, pNode, BindIP, INADDR_ANY);
917	if (slirp_redir(pThis->pNATState, fUDP, BindIP, iHostPort, GuestIP, iGuestPort, Mac.au8) < 0)
918	return PDMDrvHlpVMSetError(pThis->pDrvIns, VERR_NAT_REDIR_SETUP, RT_SRC_POS,
919	N_("NAT#%d: configuration error: failed to set up "
920	"redirection of %d to %d. Probably a conflict with "
921	"existing services or other rules"), iInstance, iHostPort,
922	iGuestPort);
923	} /* for each redir rule */
924
925	return VINF_SUCCESS;
926	}
927
928
929	/**
930	* Destruct a driver instance.
931	*
932	* Most VM resources are freed by the VM. This callback is provided so that any non-VM
933	* resources can be freed correctly.
934	*
935	* @param pDrvIns The driver instance data.
936	*/
937	static DECLCALLBACK(void) drvNATDestruct(PPDMDRVINS pDrvIns)
938	{
939	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
940	LogFlow(("drvNATDestruct:\n"));
941	PDMDRV_CHECK_VERSIONS_RETURN_VOID(pDrvIns);
942
943	slirp_term(pThis->pNATState);
944	slirp_deregister_statistics(pThis->pNATState, pDrvIns);
945	pThis->pNATState = NULL;
946	#ifdef VBOX_WITH_STATISTICS
947	# define DRV_PROFILE_COUNTER(name, dsc) DEREGISTER_COUNTER(name, pThis)
948	# define DRV_COUNTING_COUNTER(name, dsc) DEREGISTER_COUNTER(name, pThis)
949	# include "counters.h"
950	#endif
951	}
952
953
954	/**
955	* Construct a NAT network transport driver instance.
956	*
957	* @copydoc FNPDMDRVCONSTRUCT
958	*/
959	static DECLCALLBACK(int) drvNATConstruct(PPDMDRVINS pDrvIns, PCFGMNODE pCfg, uint32_t fFlags)
960	{
961	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
962	LogFlow(("drvNATConstruct:\n"));
963	PDMDRV_CHECK_VERSIONS_RETURN(pDrvIns);
964
965	/*
966	* Validate the config.
967	*/
968	if (!CFGMR3AreValuesValid(pCfg,
969	"PassDomain\0TFTPPrefix\0BootFile\0Network"
970	"\0NextServer\0DNSProxy\0BindIP\0UseHostResolver\0"
971	"SlirpMTU\0"
972	"SockRcv\0SockSnd\0TcpRcv\0TcpSnd\0"))
973	return PDMDRV_SET_ERROR(pDrvIns, VERR_PDM_DRVINS_UNKNOWN_CFG_VALUES,
974	N_("Unknown NAT configuration option, only supports PassDomain,"
975	" TFTPPrefix, BootFile and Network"));
976
977	/*
978	* Init the static parts.
979	*/
980	pThis->pDrvIns = pDrvIns;
981	pThis->pNATState = NULL;
982	pThis->pszTFTPPrefix = NULL;
983	pThis->pszBootFile = NULL;
984	pThis->pszNextServer = NULL;
985	/* IBase */
986	pDrvIns->IBase.pfnQueryInterface = drvNATQueryInterface;
987	/* INetwork */
988	/** @todo implement the new INetworkUp interfaces. */
989	pThis->INetworkUp.pfnSendDeprecated = drvNATSendDeprecated;
990	pThis->INetworkUp.pfnSetPromiscuousMode = drvNATSetPromiscuousMode;
991	pThis->INetworkUp.pfnNotifyLinkChanged = drvNATNotifyLinkChanged;
992
993	/*
994	* Get the configuration settings.
995	*/
996	int rc;
997	bool fPassDomain = true;
998	GET_BOOL(rc, pThis, pCfg, "PassDomain", fPassDomain);
999
1000	GET_STRING_ALLOC(rc, pThis, pCfg, "TFTPPrefix", pThis->pszTFTPPrefix);
1001	GET_STRING_ALLOC(rc, pThis, pCfg, "BootFile", pThis->pszBootFile);
1002	GET_STRING_ALLOC(rc, pThis, pCfg, "NextServer", pThis->pszNextServer);
1003
1004	int fDNSProxy = 0;
1005	GET_S32(rc, pThis, pCfg, "DNSProxy", fDNSProxy);
1006	int fUseHostResolver = 0;
1007	GET_S32(rc, pThis, pCfg, "UseHostResolver", fUseHostResolver);
1008	#ifdef VBOX_WITH_SLIRP_BSD_MBUF
1009	int MTU = 1500;
1010	GET_S32(rc, pThis, pCfg, "SlirpMTU", MTU);
1011	#endif
1012
1013	/*
1014	* Query the network port interface.
1015	*/
1016	pThis->pIAboveNet = PDMIBASE_QUERY_INTERFACE(pDrvIns->pUpBase, PDMINETWORKDOWN);
1017	if (!pThis->pIAboveNet)
1018	return PDMDRV_SET_ERROR(pDrvIns, VERR_PDM_MISSING_INTERFACE_ABOVE,
1019	N_("Configuration error: the above device/driver didn't "
1020	"export the network port interface"));
1021	pThis->pIAboveConfig = PDMIBASE_QUERY_INTERFACE(pDrvIns->pUpBase, PDMINETWORKCONFIG);
1022	if (!pThis->pIAboveConfig)
1023	return PDMDRV_SET_ERROR(pDrvIns, VERR_PDM_MISSING_INTERFACE_ABOVE,
1024	N_("Configuration error: the above device/driver didn't "
1025	"export the network config interface"));
1026
1027	/* Generate a network address for this network card. */
1028	char szNetwork[32]; /* xxx.xxx.xxx.xxx/yy */
1029	GET_STRING(rc, pThis, pCfg, "Network", szNetwork[0], sizeof(szNetwork));
1030	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
1031	RTStrPrintf(szNetwork, sizeof(szNetwork), "10.0.%d.0/24", pDrvIns->iInstance + 2);
1032
1033	RTIPV4ADDR Network;
1034	RTIPV4ADDR Netmask;
1035	rc = RTCidrStrToIPv4(szNetwork, &Network, &Netmask);
1036	if (RT_FAILURE(rc))
1037	return PDMDrvHlpVMSetError(pDrvIns, rc, RT_SRC_POS, N_("NAT#%d: Configuration error: "
1038	"network '%s' describes not a valid IPv4 network"),
1039	pDrvIns->iInstance, szNetwork);
1040
1041	char szNetAddr[16];
1042	RTStrPrintf(szNetAddr, sizeof(szNetAddr), "%d.%d.%d.%d",
1043	(Network & 0xFF000000) >> 24, (Network & 0xFF0000) >> 16,
1044	(Network & 0xFF00) >> 8, Network & 0xFF);
1045
1046	/*
1047	* Initialize slirp.
1048	*/
1049	rc = slirp_init(&pThis->pNATState, &szNetAddr[0], Netmask, fPassDomain, !!fUseHostResolver, pThis);
1050	if (RT_SUCCESS(rc))
1051	{
1052	slirp_set_dhcp_TFTP_prefix(pThis->pNATState, pThis->pszTFTPPrefix);
1053	slirp_set_dhcp_TFTP_bootfile(pThis->pNATState, pThis->pszBootFile);
1054	slirp_set_dhcp_next_server(pThis->pNATState, pThis->pszNextServer);
1055	slirp_set_dhcp_dns_proxy(pThis->pNATState, !!fDNSProxy);
1056	#ifdef VBOX_WITH_SLIRP_BSD_MBUF
1057	slirp_set_mtu(pThis->pNATState, MTU);
1058	#endif
1059	char *pszBindIP = NULL;
1060	GET_STRING_ALLOC(rc, pThis, pCfg, "BindIP", pszBindIP);
1061	rc = slirp_set_binding_address(pThis->pNATState, pszBindIP);
1062	if (rc != 0)
1063	LogRel(("NAT: value of BindIP has been ignored\n"));
1064
1065	if(pszBindIP != NULL)
1066	MMR3HeapFree(pszBindIP);
1067	#define SLIRP_SET_TUNING_VALUE(name, setter) \
1068	do \
1069	{ \
1070	int len = 0; \
1071	rc = CFGMR3QueryS32(pCfg, name, &len); \
1072	if (RT_SUCCESS(rc)) \
1073	setter(pThis->pNATState, len); \
1074	} while(0)
1075
1076	SLIRP_SET_TUNING_VALUE("SockRcv", slirp_set_rcvbuf);
1077	SLIRP_SET_TUNING_VALUE("SockSnd", slirp_set_sndbuf);
1078	SLIRP_SET_TUNING_VALUE("TcpRcv", slirp_set_tcp_rcvspace);
1079	SLIRP_SET_TUNING_VALUE("TcpSnd", slirp_set_tcp_sndspace);
1080
1081	slirp_register_statistics(pThis->pNATState, pDrvIns);
1082	#ifdef VBOX_WITH_STATISTICS
1083	# define DRV_PROFILE_COUNTER(name, dsc) REGISTER_COUNTER(name, pThis, STAMTYPE_PROFILE, STAMUNIT_TICKS_PER_CALL, dsc)
1084	# define DRV_COUNTING_COUNTER(name, dsc) REGISTER_COUNTER(name, pThis, STAMTYPE_COUNTER, STAMUNIT_COUNT, dsc)
1085	# include "counters.h"
1086	#endif
1087
1088	int rc2 = drvNATConstructRedir(pDrvIns->iInstance, pThis, pCfg, Network);
1089	if (RT_SUCCESS(rc2))
1090	{
1091	/*
1092	* Register a load done notification to get the MAC address into the slirp
1093	* engine after we loaded a guest state.
1094	*/
1095	rc2 = PDMDrvHlpSSMRegisterLoadDone(pDrvIns, drvNATLoadDone);
1096	AssertRC(rc2);
1097	rc = RTReqCreateQueue(&pThis->pSlirpReqQueue);
1098	if (RT_FAILURE(rc))
1099	{
1100	LogRel(("NAT: Can't create request queue\n"));
1101	return rc;
1102	}
1103
1104
1105	rc = RTReqCreateQueue(&pThis->pRecvReqQueue);
1106	if (RT_FAILURE(rc))
1107	{
1108	LogRel(("NAT: Can't create request queue\n"));
1109	return rc;
1110	}
1111	rc = RTReqCreateQueue(&pThis->pUrgRecvReqQueue);
1112	if (RT_FAILURE(rc))
1113	{
1114	LogRel(("NAT: Can't create request queue\n"));
1115	return rc;
1116	}
1117	rc = PDMDrvHlpPDMThreadCreate(pDrvIns, &pThis->pRecvThread, pThis, drvNATRecv,
1118	drvNATRecvWakeup, 128 * _1K, RTTHREADTYPE_IO, "NATRX");
1119	AssertRC(rc);
1120	rc = RTSemEventCreate(&pThis->EventRecv);
1121
1122	rc = PDMDrvHlpPDMThreadCreate(pDrvIns, &pThis->pUrgRecvThread, pThis, drvNATUrgRecv,
1123	drvNATUrgRecvWakeup, 128 * _1K, RTTHREADTYPE_IO, "NATURGRX");
1124	AssertRC(rc);
1125	rc = RTSemEventCreate(&pThis->EventRecv);
1126	rc = RTSemEventCreate(&pThis->EventUrgRecv);
1127	rc = RTCritSectInit(&pThis->csDevAccess);
1128	rc = PDMDrvHlpTMTimerCreate(pThis->pDrvIns, TMCLOCK_REAL/enmClock/, drvNATSlowTimer,
1129	pThis, TMTIMER_FLAGS_NO_CRIT_SECT/flags/, "NATSlowTmr", &pThis->pTmrSlow);
1130	rc = PDMDrvHlpTMTimerCreate(pThis->pDrvIns, TMCLOCK_REAL/enmClock/, drvNATFastTimer,
1131	pThis, TMTIMER_FLAGS_NO_CRIT_SECT/flags/, "NATFastTmr", &pThis->pTmrFast);
1132
1133	#ifndef RT_OS_WINDOWS
1134	/*
1135	* Create the control pipe.
1136	*/
1137	int fds[2];
1138	if (pipe(&fds[0]) != 0) /** @todo RTPipeCreate() or something... */
1139	{
1140	rc = RTErrConvertFromErrno(errno);
1141	AssertRC(rc);
1142	return rc;
1143	}
1144	pThis->PipeRead = fds[0];
1145	pThis->PipeWrite = fds[1];
1146	#else
1147	pThis->hWakeupEvent = CreateEvent(NULL, FALSE, FALSE, NULL); /* auto-reset event */
1148	slirp_register_external_event(pThis->pNATState, pThis->hWakeupEvent,
1149	VBOX_WAKEUP_EVENT_INDEX);
1150	#endif
1151
1152	rc = PDMDrvHlpPDMThreadCreate(pDrvIns, &pThis->pSlirpThread, pThis, drvNATAsyncIoThread,
1153	drvNATAsyncIoWakeup, 128 * _1K, RTTHREADTYPE_IO, "NAT");
1154	AssertRC(rc);
1155
1156	#ifdef VBOX_WITH_SLIRP_MT
1157	rc = PDMDrvHlpPDMThreadCreate(pDrvIns, &pThis->pGuestThread, pThis, drvNATAsyncIoGuest,
1158	drvNATAsyncIoGuestWakeup, 128 * _1K, RTTHREADTYPE_IO, "NATGUEST");
1159	AssertRC(rc);
1160	#endif
1161
1162	pThis->enmLinkState = PDMNETWORKLINKSTATE_UP;
1163
1164	/* might return VINF_NAT_DNS */
1165	return rc;
1166	}
1167	/* failure path */
1168	rc = rc2;
1169	slirp_term(pThis->pNATState);
1170	pThis->pNATState = NULL;
1171	}
1172	else
1173	{
1174	PDMDRV_SET_ERROR(pDrvIns, rc, N_("Unknown error during NAT networking setup: "));
1175	AssertMsgFailed(("Add error message for rc=%d (%Rrc)\n", rc, rc));
1176	}
1177
1178	return rc;
1179	}
1180
1181
1182	/**
1183	* NAT network transport driver registration record.
1184	*/
1185	const PDMDRVREG g_DrvNAT =
1186	{
1187	/* u32Version */
1188	PDM_DRVREG_VERSION,
1189	/* szName */
1190	"NAT",
1191	/* szRCMod */
1192	"",
1193	/* szR0Mod */
1194	"",
1195	/* pszDescription */
1196	"NAT Network Transport Driver",
1197	/* fFlags */
1198	PDM_DRVREG_FLAGS_HOST_BITS_DEFAULT,
1199	/* fClass. */
1200	PDM_DRVREG_CLASS_NETWORK,
1201	/* cMaxInstances */
1202	16,
1203	/* cbInstance */
1204	sizeof(DRVNAT),
1205	/* pfnConstruct */
1206	drvNATConstruct,
1207	/* pfnDestruct */
1208	drvNATDestruct,
1209	/* pfnRelocate */
1210	NULL,
1211	/* pfnIOCtl */
1212	NULL,
1213	/* pfnPowerOn */
1214	drvNATPowerOn,
1215	/* pfnReset */
1216	NULL,
1217	/* pfnSuspend */
1218	NULL,
1219	/* pfnResume */
1220	NULL,
1221	/* pfnAttach */
1222	NULL,
1223	/* pfnDetach */
1224	NULL,
1225	/* pfnPowerOff */
1226	NULL,
1227	/* pfnSoftReset */
1228	NULL,
1229	/* u32EndVersion */
1230	PDM_DRVREG_VERSION
1231	};
1232

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source: vbox/trunk/src/VBox/Devices/Network/DrvNAT.cpp@ 26495

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