DrvNAT.cpp@ 25276

Last change on this file since 25276 was 25130, checked in by vboxsync, 15 years ago
NAT: unconditional signal.
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1	/* $Id: DrvNAT.cpp 25130 2009-12-01 15:58:57Z 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	rc = RTSemEventSignal(pThis->EventRecv);
252
253	STAM_COUNTER_INC(&pThis->StatNATRecvWakeups);
254	return VINF_SUCCESS;
255	}
256
257	static DECLCALLBACK(int) drvNATUrgRecv(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
258	{
259	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
260
261	if (pThread->enmState == PDMTHREADSTATE_INITIALIZING)
262	return VINF_SUCCESS;
263
264	while (pThread->enmState == PDMTHREADSTATE_RUNNING)
265	{
266	RTReqProcess(pThis->pUrgRecvReqQueue, 0);
267	if (ASMAtomicReadU32(&pThis->cUrgPkt) == 0)
268	{
269	int rc = RTSemEventWait(pThis->EventUrgRecv, RT_INDEFINITE_WAIT);
270	AssertRC(rc);
271	}
272	}
273	return VINF_SUCCESS;
274	}
275	static DECLCALLBACK(int) drvNATUrgRecvWakeup(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
276	{
277	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
278	int rc = RTSemEventSignal(pThis->EventUrgRecv);
279	AssertRC(rc);
280
281	return VINF_SUCCESS;
282	}
283
284	static DECLCALLBACK(void) drvNATUrgRecvWorker(PDRVNAT pThis, uint8_t pu8Buf, int cb, void pvArg)
285	{
286	int rc = RTCritSectEnter(&pThis->csDevAccess);
287	AssertRC(rc);
288	rc = pThis->pPort->pfnWaitReceiveAvail(pThis->pPort, RT_INDEFINITE_WAIT);
289	if (RT_SUCCESS(rc))
290	{
291	rc = pThis->pPort->pfnReceive(pThis->pPort, pu8Buf, cb);
292	AssertRC(rc);
293	}
294	else if ( RT_FAILURE(rc)
295	&& ( rc == VERR_TIMEOUT
296	&& rc == VERR_INTERRUPTED))
297	{
298	AssertRC(rc);
299	}
300
301	rc = RTCritSectLeave(&pThis->csDevAccess);
302	AssertRC(rc);
303
304	slirp_ext_m_free(pThis->pNATState, pvArg);
305	if (ASMAtomicDecU32(&pThis->cUrgPkt) == 0)
306	{
307	drvNATRecvWakeup(pThis->pDrvIns, pThis->pRecvThread);
308	drvNATNotifyNATThread(pThis);
309	}
310	}
311
312
313	static DECLCALLBACK(void) drvNATRecvWorker(PDRVNAT pThis, uint8_t pu8Buf, int cb, void pvArg)
314	{
315	int rc;
316	STAM_PROFILE_START(&pThis->StatNATRecv, a);
317
318	STAM_PROFILE_START(&pThis->StatNATRecvWait, b);
319
320	while(ASMAtomicReadU32(&pThis->cUrgPkt) != 0)
321	{
322	rc = RTSemEventWait(pThis->EventRecv, RT_INDEFINITE_WAIT);
323	if ( RT_FAILURE(rc)
324	&& ( rc == VERR_TIMEOUT
325	\|\| rc == VERR_INTERRUPTED))
326	goto done_unlocked;
327	}
328
329	rc = RTCritSectEnter(&pThis->csDevAccess);
330
331	rc = pThis->pPort->pfnWaitReceiveAvail(pThis->pPort, RT_INDEFINITE_WAIT);
332	if (RT_SUCCESS(rc))
333	{
334	rc = pThis->pPort->pfnReceive(pThis->pPort, pu8Buf, cb);
335	AssertRC(rc);
336	}
337	else if ( RT_FAILURE(rc)
338	&& ( rc != VERR_TIMEOUT
339	&& rc != VERR_INTERRUPTED))
340	{
341	AssertRC(rc);
342	}
343
344	rc = RTCritSectLeave(&pThis->csDevAccess);
345	AssertRC(rc);
346	done_unlocked:
347	slirp_ext_m_free(pThis->pNATState, pvArg);
348	ASMAtomicDecU32(&pThis->cPkt);
349
350	drvNATNotifyNATThread(pThis);
351
352	STAM_PROFILE_STOP(&pThis->StatNATRecvWait, b);
353	STAM_PROFILE_STOP(&pThis->StatNATRecv, a);
354	}
355
356	/**
357	* Worker function for drvNATSend().
358	* @thread "NAT" thread.
359	*/
360	static void drvNATSendWorker(PDRVNAT pThis, void *pvBuf, size_t cb)
361	{
362	Assert(pThis->enmLinkState == PDMNETWORKLINKSTATE_UP);
363	if (pThis->enmLinkState == PDMNETWORKLINKSTATE_UP)
364	slirp_input(pThis->pNATState, pvBuf);
365	}
366
367
368	/**
369	* Called by the guest to send data to the network.
370	*
371	* @returns VBox status code.
372	* @param pInterface Pointer to the interface structure containing the called function pointer.
373	* @param pvBuf Data to send.
374	* @param cb Number of bytes to send.
375	* @thread EMT
376	*/
377	static DECLCALLBACK(int) drvNATSend(PPDMINETWORKCONNECTOR pInterface, const void *pvBuf, size_t cb)
378	{
379	PDRVNAT pThis = PDMINETWORKCONNECTOR_2_DRVNAT(pInterface);
380
381	LogFlow(("drvNATSend: pvBuf=%p cb=%#x\n", pvBuf, cb));
382	Log2(("drvNATSend: pvBuf=%p cb=%#x\n%.*Rhxd\n", pvBuf, cb, cb, pvBuf));
383
384	PRTREQ pReq = NULL;
385	int rc;
386	void *buf;
387
388	/* don't queue new requests when the NAT thread is about to stop */
389	if (pThis->pSlirpThread->enmState != PDMTHREADSTATE_RUNNING)
390	return VINF_SUCCESS;
391
392	#ifndef VBOX_WITH_SLIRP_MT
393	rc = RTReqAlloc(pThis->pSlirpReqQueue, &pReq, RTREQTYPE_INTERNAL);
394	#else
395	rc = RTReqAlloc((PRTREQQUEUE)slirp_get_queue(pThis->pNATState), &pReq, RTREQTYPE_INTERNAL);
396	#endif
397	AssertRC(rc);
398
399	/* @todo: Here we should get mbuf instead temporal buffer */
400	#if 0
401	buf = RTMemAlloc(cb);
402	if (buf == NULL)
403	{
404	LogRel(("NAT: Can't allocate send buffer\n"));
405	return VERR_NO_MEMORY;
406	}
407	memcpy(buf, pvBuf, cb);
408	#else
409	void *pvmBuf = slirp_ext_m_get(pThis->pNATState);
410	Assert(pvmBuf);
411	slirp_ext_m_append(pThis->pNATState, pvmBuf, (uint8_t *)pvBuf, cb);
412	#endif
413
414	pReq->u.Internal.pfn = (PFNRT)drvNATSendWorker;
415	pReq->u.Internal.cArgs = 2;
416	pReq->u.Internal.aArgs[0] = (uintptr_t)pThis;
417	pReq->u.Internal.aArgs[1] = (uintptr_t)pvmBuf;
418	pReq->fFlags = RTREQFLAGS_VOID\|RTREQFLAGS_NO_WAIT;
419
420	rc = RTReqQueue(pReq, 0); /* don't wait, we have to wakeup the NAT thread fist */
421	AssertRC(rc);
422	drvNATNotifyNATThread(pThis);
423	LogFlow(("drvNATSend: end\n"));
424	return VINF_SUCCESS;
425	}
426
427
428	/**
429	* Get the NAT thread out of poll/WSAWaitForMultipleEvents
430	*/
431	static void drvNATNotifyNATThread(PDRVNAT pThis)
432	{
433	int rc;
434	#ifndef RT_OS_WINDOWS
435	/* kick select() */
436	rc = RTFileWrite(pThis->PipeWrite, "", 1, NULL);
437	#else
438	/* kick WSAWaitForMultipleEvents */
439	rc = WSASetEvent(pThis->hWakeupEvent);
440	#endif
441	AssertRC(rc);
442	}
443
444
445	/**
446	* Set promiscuous mode.
447	*
448	* This is called when the promiscuous mode is set. This means that there doesn't have
449	* to be a mode change when it's called.
450	*
451	* @param pInterface Pointer to the interface structure containing the called function pointer.
452	* @param fPromiscuous Set if the adaptor is now in promiscuous mode. Clear if it is not.
453	* @thread EMT
454	*/
455	static DECLCALLBACK(void) drvNATSetPromiscuousMode(PPDMINETWORKCONNECTOR pInterface, bool fPromiscuous)
456	{
457	LogFlow(("drvNATSetPromiscuousMode: fPromiscuous=%d\n", fPromiscuous));
458	/* nothing to do */
459	}
460
461	/**
462	* Worker function for drvNATNotifyLinkChanged().
463	* @thread "NAT" thread.
464	*/
465	static void drvNATNotifyLinkChangedWorker(PDRVNAT pThis, PDMNETWORKLINKSTATE enmLinkState)
466	{
467	pThis->enmLinkState = enmLinkState;
468
469	switch (enmLinkState)
470	{
471	case PDMNETWORKLINKSTATE_UP:
472	LogRel(("NAT: link up\n"));
473	slirp_link_up(pThis->pNATState);
474	break;
475
476	case PDMNETWORKLINKSTATE_DOWN:
477	case PDMNETWORKLINKSTATE_DOWN_RESUME:
478	LogRel(("NAT: link down\n"));
479	slirp_link_down(pThis->pNATState);
480	break;
481
482	default:
483	AssertMsgFailed(("drvNATNotifyLinkChanged: unexpected link state %d\n", enmLinkState));
484	}
485	}
486
487
488	/**
489	* Notification on link status changes.
490	*
491	* @param pInterface Pointer to the interface structure containing the called function pointer.
492	* @param enmLinkState The new link state.
493	* @thread EMT
494	*/
495	static DECLCALLBACK(void) drvNATNotifyLinkChanged(PPDMINETWORKCONNECTOR pInterface, PDMNETWORKLINKSTATE enmLinkState)
496	{
497	PDRVNAT pThis = PDMINETWORKCONNECTOR_2_DRVNAT(pInterface);
498
499	LogFlow(("drvNATNotifyLinkChanged: enmLinkState=%d\n", enmLinkState));
500
501	PRTREQ pReq = NULL;
502
503	/* don't queue new requests when the NAT thread is about to stop */
504	if (pThis->pSlirpThread->enmState != PDMTHREADSTATE_RUNNING)
505	return;
506
507	int rc = RTReqAlloc(pThis->pSlirpReqQueue, &pReq, RTREQTYPE_INTERNAL);
508	AssertRC(rc);
509	pReq->u.Internal.pfn = (PFNRT)drvNATNotifyLinkChangedWorker;
510	pReq->u.Internal.cArgs = 2;
511	pReq->u.Internal.aArgs[0] = (uintptr_t)pThis;
512	pReq->u.Internal.aArgs[1] = (uintptr_t)enmLinkState;
513	pReq->fFlags = RTREQFLAGS_VOID;
514	rc = RTReqQueue(pReq, 0); /* don't wait, we have to wakeup the NAT thread fist */
515	if (RT_LIKELY(rc == VERR_TIMEOUT))
516	{
517	drvNATNotifyNATThread(pThis);
518	rc = RTReqWait(pReq, RT_INDEFINITE_WAIT);
519	AssertRC(rc);
520	}
521	else
522	AssertRC(rc);
523	RTReqFree(pReq);
524	}
525
526	/**
527	* NAT thread handling the slirp stuff. The slirp implementation is single-threaded
528	* so we execute this enginre in a dedicated thread. We take care that this thread
529	* does not become the bottleneck: If the guest wants to send, a request is enqueued
530	* into the pSlirpReqQueue and handled asynchronously by this thread. If this thread
531	* wants to deliver packets to the guest, it enqueues a request into pRecvReqQueue
532	* which is later handled by the Recv thread.
533	*/
534	static DECLCALLBACK(int) drvNATAsyncIoThread(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
535	{
536	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
537	int nFDs = -1;
538	unsigned int ms;
539	#ifdef RT_OS_WINDOWS
540	DWORD event;
541	HANDLE *phEvents;
542	unsigned int cBreak = 0;
543	#else /* RT_OS_WINDOWS */
544	struct pollfd *polls = NULL;
545	unsigned int cPollNegRet = 0;
546	#endif /* !RT_OS_WINDOWS */
547
548	LogFlow(("drvNATAsyncIoThread: pThis=%p\n", pThis));
549
550	if (pThread->enmState == PDMTHREADSTATE_INITIALIZING)
551	return VINF_SUCCESS;
552
553	#ifdef RT_OS_WINDOWS
554	phEvents = slirp_get_events(pThis->pNATState);
555	#endif /* RT_OS_WINDOWS */
556
557	/*
558	* Polling loop.
559	*/
560	while (pThread->enmState == PDMTHREADSTATE_RUNNING)
561	{
562	nFDs = -1;
563	/*
564	* To prevent concurent execution of sending/receving threads
565	*/
566	#ifndef RT_OS_WINDOWS
567	nFDs = slirp_get_nsock(pThis->pNATState);
568	polls = NULL;
569	/* allocation for all sockets + Management pipe */
570	polls = (struct pollfd )RTMemAlloc((1 + nFDs) sizeof(struct pollfd) + sizeof(uint32_t));
571	if (polls == NULL)
572	return VERR_NO_MEMORY;
573
574	/* don't pass the managemant pipe */
575	slirp_select_fill(pThis->pNATState, &nFDs, &polls[1]);
576	#if 0
577	ms = slirp_get_timeout_ms(pThis->pNATState);
578	#else
579	ms = 0;
580	#endif
581
582	polls[0].fd = pThis->PipeRead;
583	/* POLLRDBAND usually doesn't used on Linux but seems used on Solaris */
584	polls[0].events = POLLRDNORM\|POLLPRI\|POLLRDBAND;
585	polls[0].revents = 0;
586
587	int cChangedFDs = poll(polls, nFDs + 1, ms ? ms : -1);
588	if (cChangedFDs < 0)
589	{
590	if (errno == EINTR)
591	{
592	Log2(("NAT: signal was caught while sleep on poll\n"));
593	/* No error, just process all outstanding requests but don't wait */
594	cChangedFDs = 0;
595	}
596	else if (cPollNegRet++ > 128)
597	{
598	LogRel(("NAT:Poll returns (%s) suppressed %d\n", strerror(errno), cPollNegRet));
599	cPollNegRet = 0;
600	}
601	}
602
603	if (cChangedFDs >= 0)
604	{
605	slirp_select_poll(pThis->pNATState, &polls[1], nFDs);
606	if (polls[0].revents & (POLLRDNORM\|POLLPRI\|POLLRDBAND))
607	{
608	/* drain the pipe */
609	char ch[1];
610	size_t cbRead;
611	int counter = 0;
612	/*
613	* drvNATSend decoupled so we don't know how many times
614	* device's thread sends before we've entered multiplex,
615	* so to avoid false alarm drain pipe here to the very end
616	*
617	* @todo: Probably we should counter drvNATSend to count how
618	* deep pipe has been filed before drain.
619	*
620	* XXX:Make it reading exactly we need to drain the pipe.
621	*/
622	RTFileRead(pThis->PipeRead, &ch, 1, &cbRead);
623	}
624	}
625	/* process _all_ outstanding requests but don't wait */
626	RTReqProcess(pThis->pSlirpReqQueue, 0);
627	RTMemFree(polls);
628	#else /* RT_OS_WINDOWS */
629	slirp_select_fill(pThis->pNATState, &nFDs);
630	#if 0
631	ms = slirp_get_timeout_ms(pThis->pNATState);
632	#else
633	ms = 0;
634	#endif
635	struct timeval tv = { 0, ms*1000 };
636	event = WSAWaitForMultipleEvents(nFDs, phEvents, FALSE, ms ? ms : WSA_INFINITE, FALSE);
637	if ( (event < WSA_WAIT_EVENT_0 \|\| event > WSA_WAIT_EVENT_0 + nFDs - 1)
638	&& event != WSA_WAIT_TIMEOUT)
639	{
640	int error = WSAGetLastError();
641	LogRel(("NAT: WSAWaitForMultipleEvents returned %d (error %d)\n", event, error));
642	RTAssertPanic();
643	}
644
645	if (event == WSA_WAIT_TIMEOUT)
646	{
647	/* only check for slow/fast timers */
648	slirp_select_poll(pThis->pNATState, /* fTimeout=/true, /fIcmp=*/false);
649	continue;
650	}
651	/* poll the sockets in any case */
652	Log2(("%s: poll\n", __FUNCTION__));
653	slirp_select_poll(pThis->pNATState, /* fTimeout=/false, / fIcmp=*/(event == WSA_WAIT_EVENT_0));
654	/* process _all_ outstanding requests but don't wait */
655	RTReqProcess(pThis->pSlirpReqQueue, 0);
656	# ifdef VBOX_NAT_DELAY_HACK
657	if (cBreak++ > 128)
658	{
659	cBreak = 0;
660	RTThreadSleep(2);
661	}
662	# endif
663	#endif /* RT_OS_WINDOWS */
664	}
665
666	return VINF_SUCCESS;
667	}
668
669
670	/**
671	* Unblock the send thread so it can respond to a state change.
672	*
673	* @returns VBox status code.
674	* @param pDevIns The pcnet device instance.
675	* @param pThread The send thread.
676	*/
677	static DECLCALLBACK(int) drvNATAsyncIoWakeup(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
678	{
679	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
680
681	drvNATNotifyNATThread(pThis);
682	return VINF_SUCCESS;
683	}
684
685	#ifdef VBOX_WITH_SLIRP_MT
686
687	static DECLCALLBACK(int) drvNATAsyncIoGuest(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
688	{
689	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
690
691	if (pThread->enmState == PDMTHREADSTATE_INITIALIZING)
692	return VINF_SUCCESS;
693
694	while (pThread->enmState == PDMTHREADSTATE_RUNNING)
695	slirp_process_queue(pThis->pNATState);
696
697	return VINF_SUCCESS;
698	}
699
700
701	static DECLCALLBACK(int) drvNATAsyncIoGuestWakeup(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
702	{
703	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
704
705	return VINF_SUCCESS;
706	}
707
708	#endif /* VBOX_WITH_SLIRP_MT */
709
710	void slirp_arm_fast_timer(void *pvUser)
711	{
712	PDRVNAT pThis = (PDRVNAT)pvUser;
713	Assert(pThis);
714	TMTimerSetMillies(pThis->pTmrFast, 2);
715	}
716
717	void slirp_arm_slow_timer(void *pvUser)
718	{
719	PDRVNAT pThis = (PDRVNAT)pvUser;
720	Assert(pThis);
721	TMTimerSetMillies(pThis->pTmrSlow, 500);
722	}
723
724	/**
725	* Function called by slirp to check if it's possible to feed incoming data to the network port.
726	* @returns 1 if possible.
727	* @returns 0 if not possible.
728	*/
729	int slirp_can_output(void *pvUser)
730	{
731	return 1;
732	}
733
734	void slirp_push_recv_thread(void *pvUser)
735	{
736	PDRVNAT pThis = (PDRVNAT)pvUser;
737	Assert(pThis);
738	drvNATUrgRecvWakeup(pThis->pDrvIns, pThis->pUrgRecvThread);
739	}
740
741	void slirp_urg_output(void pvUser, void pvArg, const uint8_t *pu8Buf, int cb)
742	{
743	PDRVNAT pThis = (PDRVNAT)pvUser;
744	Assert(pThis);
745
746	PRTREQ pReq = NULL;
747
748	/* don't queue new requests when the NAT thread is about to stop */
749	if (pThis->pSlirpThread->enmState != PDMTHREADSTATE_RUNNING)
750	return;
751
752	int rc = RTReqAlloc(pThis->pUrgRecvReqQueue, &pReq, RTREQTYPE_INTERNAL);
753	AssertRC(rc);
754	ASMAtomicIncU32(&pThis->cUrgPkt);
755	pReq->u.Internal.pfn = (PFNRT)drvNATUrgRecvWorker;
756	pReq->u.Internal.cArgs = 4;
757	pReq->u.Internal.aArgs[0] = (uintptr_t)pThis;
758	pReq->u.Internal.aArgs[1] = (uintptr_t)pu8Buf;
759	pReq->u.Internal.aArgs[2] = (uintptr_t)cb;
760	pReq->u.Internal.aArgs[3] = (uintptr_t)pvArg;
761	pReq->fFlags = RTREQFLAGS_VOID\|RTREQFLAGS_NO_WAIT;
762	rc = RTReqQueue(pReq, 0);
763	AssertRC(rc);
764	drvNATUrgRecvWakeup(pThis->pDrvIns, pThis->pUrgRecvThread);
765	}
766
767	/**
768	* Function called by slirp to feed incoming data to the network port.
769	*/
770	void slirp_output(void pvUser, void pvArg, const uint8_t *pu8Buf, int cb)
771	{
772	PDRVNAT pThis = (PDRVNAT)pvUser;
773	Assert(pThis);
774
775	LogFlow(("slirp_output BEGIN %x %d\n", pu8Buf, cb));
776	Log2(("slirp_output: pu8Buf=%p cb=%#x (pThis=%p)\n%.*Rhxd\n", pu8Buf, cb, pThis, cb, pu8Buf));
777
778	PRTREQ pReq = NULL;
779
780	/* don't queue new requests when the NAT thread is about to stop */
781	if (pThis->pSlirpThread->enmState != PDMTHREADSTATE_RUNNING)
782	return;
783
784	int rc = RTReqAlloc(pThis->pRecvReqQueue, &pReq, RTREQTYPE_INTERNAL);
785	AssertRC(rc);
786	ASMAtomicIncU32(&pThis->cPkt);
787	pReq->u.Internal.pfn = (PFNRT)drvNATRecvWorker;
788	pReq->u.Internal.cArgs = 4;
789	pReq->u.Internal.aArgs[0] = (uintptr_t)pThis;
790	pReq->u.Internal.aArgs[1] = (uintptr_t)pu8Buf;
791	pReq->u.Internal.aArgs[2] = (uintptr_t)cb;
792	pReq->u.Internal.aArgs[3] = (uintptr_t)pvArg;
793	pReq->fFlags = RTREQFLAGS_VOID\|RTREQFLAGS_NO_WAIT;
794	rc = RTReqQueue(pReq, 0);
795	AssertRC(rc);
796	drvNATRecvWakeup(pThis->pDrvIns, pThis->pRecvThread);
797	STAM_COUNTER_INC(&pThis->StatQueuePktSent);
798	}
799
800
801	/**
802	* Queries an interface to the driver.
803	*
804	* @returns Pointer to interface.
805	* @returns NULL if the interface was not supported by the driver.
806	* @param pInterface Pointer to this interface structure.
807	* @param enmInterface The requested interface identification.
808	* @thread Any thread.
809	*/
810	static DECLCALLBACK(void *) drvNATQueryInterface(PPDMIBASE pInterface, PDMINTERFACE enmInterface)
811	{
812	PPDMDRVINS pDrvIns = PDMIBASE_2_PDMDRV(pInterface);
813	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
814	switch (enmInterface)
815	{
816	case PDMINTERFACE_BASE:
817	return &pDrvIns->IBase;
818	case PDMINTERFACE_NETWORK_CONNECTOR:
819	return &pThis->INetworkConnector;
820	default:
821	return NULL;
822	}
823	}
824
825
826	/**
827	* Get the MAC address into the slirp stack.
828	*
829	* Called by drvNATLoadDone and drvNATPowerOn.
830	*/
831	static void drvNATSetMac(PDRVNAT pThis)
832	{
833	if (pThis->pConfig)
834	{
835	RTMAC Mac;
836	pThis->pConfig->pfnGetMac(pThis->pConfig, &Mac);
837	slirp_set_ethaddr(pThis->pNATState, Mac.au8);
838	}
839	}
840
841
842	/**
843	* After loading we have to pass the MAC address of the ethernet device to the slirp stack.
844	* Otherwise the guest is not reachable until it performs a DHCP request or an ARP request
845	* (usually done during guest boot).
846	*/
847	static DECLCALLBACK(int) drvNATLoadDone(PPDMDRVINS pDrvIns, PSSMHANDLE pSSMHandle)
848	{
849	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
850	drvNATSetMac(pThis);
851	return VINF_SUCCESS;
852	}
853
854
855	/**
856	* Some guests might not use DHCP to retrieve an IP but use a static IP.
857	*/
858	static DECLCALLBACK(void) drvNATPowerOn(PPDMDRVINS pDrvIns)
859	{
860	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
861	drvNATSetMac(pThis);
862	}
863
864
865	/**
866	* Sets up the redirectors.
867	*
868	* @returns VBox status code.
869	* @param pCfgHandle The drivers configuration handle.
870	*/
871	static int drvNATConstructRedir(unsigned iInstance, PDRVNAT pThis, PCFGMNODE pCfgHandle, RTIPV4ADDR Network)
872	{
873	RTMAC Mac;
874	memset(&Mac, 0, sizeof(RTMAC)); /can't get MAC here /
875	/*
876	* Enumerate redirections.
877	*/
878	for (PCFGMNODE pNode = CFGMR3GetFirstChild(pCfgHandle); pNode; pNode = CFGMR3GetNextChild(pNode))
879	{
880	/*
881	* Validate the port forwarding config.
882	*/
883	if (!CFGMR3AreValuesValid(pNode, "Protocol\0UDP\0HostPort\0GuestPort\0GuestIP\0BindIP\0"))
884	return PDMDRV_SET_ERROR(pThis->pDrvIns, VERR_PDM_DRVINS_UNKNOWN_CFG_VALUES, N_("Unknown configuration in port forwarding"));
885
886	/* protocol type */
887	bool fUDP;
888	char szProtocol[32];
889	int rc;
890	GET_STRING(rc, pThis, pNode, "Protocol", szProtocol[0], sizeof(szProtocol));
891	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
892	{
893	fUDP = false;
894	GET_BOOL(rc, pThis, pNode, "UDP", fUDP);
895	}
896	else if (RT_SUCCESS(rc))
897	{
898	if (!RTStrICmp(szProtocol, "TCP"))
899	fUDP = false;
900	else if (!RTStrICmp(szProtocol, "UDP"))
901	fUDP = true;
902	else
903	return PDMDrvHlpVMSetError(pThis->pDrvIns, VERR_INVALID_PARAMETER, RT_SRC_POS,
904	N_("NAT#%d: Invalid configuration value for \"Protocol\": \"%s\""),
905	iInstance, szProtocol);
906	}
907	/* host port */
908	int32_t iHostPort;
909	GET_S32_STRICT(rc, pThis, pNode, "HostPort", iHostPort);
910
911	/* guest port */
912	int32_t iGuestPort;
913	GET_S32_STRICT(rc, pThis, pNode, "GuestPort", iGuestPort);
914
915	/* guest address */
916	struct in_addr GuestIP;
917	/* @todo (vvl) use CTL_* */
918	GETIP_DEF(rc, pThis, pNode, GuestIP, htonl(Network \| CTL_GUEST));
919
920	/*
921	* Call slirp about it.
922	*/
923	struct in_addr BindIP;
924	GETIP_DEF(rc, pThis, pNode, BindIP, INADDR_ANY);
925	if (slirp_redir(pThis->pNATState, fUDP, BindIP, iHostPort, GuestIP, iGuestPort, Mac.au8) < 0)
926	return PDMDrvHlpVMSetError(pThis->pDrvIns, VERR_NAT_REDIR_SETUP, RT_SRC_POS,
927	N_("NAT#%d: configuration error: failed to set up "
928	"redirection of %d to %d. Probably a conflict with "
929	"existing services or other rules"), iInstance, iHostPort,
930	iGuestPort);
931	} /* for each redir rule */
932
933	return VINF_SUCCESS;
934	}
935
936
937	/**
938	* Destruct a driver instance.
939	*
940	* Most VM resources are freed by the VM. This callback is provided so that any non-VM
941	* resources can be freed correctly.
942	*
943	* @param pDrvIns The driver instance data.
944	*/
945	static DECLCALLBACK(void) drvNATDestruct(PPDMDRVINS pDrvIns)
946	{
947	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
948
949	LogFlow(("drvNATDestruct:\n"));
950
951	slirp_term(pThis->pNATState);
952	slirp_deregister_statistics(pThis->pNATState, pDrvIns);
953	pThis->pNATState = NULL;
954	#ifdef VBOX_WITH_STATISTICS
955	# define DRV_PROFILE_COUNTER(name, dsc) DEREGISTER_COUNTER(name, pThis)
956	# define DRV_COUNTING_COUNTER(name, dsc) DEREGISTER_COUNTER(name, pThis)
957	# include "counters.h"
958	#endif
959	}
960
961
962	/**
963	* Construct a NAT network transport driver instance.
964	*
965	* @copydoc FNPDMDRVCONSTRUCT
966	*/
967	static DECLCALLBACK(int) drvNATConstruct(PPDMDRVINS pDrvIns, PCFGMNODE pCfgHandle, uint32_t fFlags)
968	{
969	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
970
971	LogFlow(("drvNATConstruct:\n"));
972
973	/*
974	* Validate the config.
975	*/
976	if (!CFGMR3AreValuesValid(pCfgHandle,
977	"PassDomain\0TFTPPrefix\0BootFile\0Network"
978	"\0NextServer\0DNSProxy\0BindIP\0UseHostResolver\0"
979	#ifdef VBOX_WITH_SLIRP_BSD_MBUF
980	"SlirpMTU\0"
981	#endif
982	"SocketRcvBuf\0SocketSndBuf\0TcpRcvSpace\0TcpSndSpace\0"))
983	return PDMDRV_SET_ERROR(pDrvIns, VERR_PDM_DRVINS_UNKNOWN_CFG_VALUES,
984	N_("Unknown NAT configuration option, only supports PassDomain,"
985	" TFTPPrefix, BootFile and Network"));
986
987	/*
988	* Init the static parts.
989	*/
990	pThis->pDrvIns = pDrvIns;
991	pThis->pNATState = NULL;
992	pThis->pszTFTPPrefix = NULL;
993	pThis->pszBootFile = NULL;
994	pThis->pszNextServer = NULL;
995	/* IBase */
996	pDrvIns->IBase.pfnQueryInterface = drvNATQueryInterface;
997	/* INetwork */
998	pThis->INetworkConnector.pfnSend = drvNATSend;
999	pThis->INetworkConnector.pfnSetPromiscuousMode = drvNATSetPromiscuousMode;
1000	pThis->INetworkConnector.pfnNotifyLinkChanged = drvNATNotifyLinkChanged;
1001
1002	/*
1003	* Get the configuration settings.
1004	*/
1005	int rc;
1006	bool fPassDomain = true;
1007	GET_BOOL(rc, pThis, pCfgHandle, "PassDomain", fPassDomain);
1008
1009	GET_STRING_ALLOC(rc, pThis, pCfgHandle, "TFTPPrefix", pThis->pszTFTPPrefix);
1010	GET_STRING_ALLOC(rc, pThis, pCfgHandle, "BootFile", pThis->pszBootFile);
1011	GET_STRING_ALLOC(rc, pThis, pCfgHandle, "NextServer", pThis->pszNextServer);
1012
1013	int fDNSProxy = 0;
1014	GET_S32(rc, pThis, pCfgHandle, "DNSProxy", fDNSProxy);
1015	int fUseHostResolver = 0;
1016	GET_S32(rc, pThis, pCfgHandle, "UseHostResolver", fUseHostResolver);
1017	#ifdef VBOX_WITH_SLIRP_BSD_MBUF
1018	int MTU = 1500;
1019	GET_S32(rc, pThis, pCfgHandle, "SlirpMTU", MTU);
1020	#endif
1021
1022	/*
1023	* Query the network port interface.
1024	*/
1025	pThis->pPort =
1026	(PPDMINETWORKPORT)pDrvIns->pUpBase->pfnQueryInterface(pDrvIns->pUpBase,
1027	PDMINTERFACE_NETWORK_PORT);
1028	if (!pThis->pPort)
1029	return PDMDRV_SET_ERROR(pDrvIns, VERR_PDM_MISSING_INTERFACE_ABOVE,
1030	N_("Configuration error: the above device/driver didn't "
1031	"export the network port interface"));
1032	pThis->pConfig =
1033	(PPDMINETWORKCONFIG)pDrvIns->pUpBase->pfnQueryInterface(pDrvIns->pUpBase,
1034	PDMINTERFACE_NETWORK_CONFIG);
1035	if (!pThis->pConfig)
1036	return PDMDRV_SET_ERROR(pDrvIns, VERR_PDM_MISSING_INTERFACE_ABOVE,
1037	N_("Configuration error: the above device/driver didn't "
1038	"export the network config interface"));
1039
1040	/* Generate a network address for this network card. */
1041	char szNetwork[32]; /* xxx.xxx.xxx.xxx/yy */
1042	GET_STRING(rc, pThis, pCfgHandle, "Network", szNetwork[0], sizeof(szNetwork));
1043	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
1044	RTStrPrintf(szNetwork, sizeof(szNetwork), "10.0.%d.0/24", pDrvIns->iInstance + 2);
1045
1046	RTIPV4ADDR Network;
1047	RTIPV4ADDR Netmask;
1048	rc = RTCidrStrToIPv4(szNetwork, &Network, &Netmask);
1049	if (RT_FAILURE(rc))
1050	return PDMDrvHlpVMSetError(pDrvIns, rc, RT_SRC_POS, N_("NAT#%d: Configuration error: "
1051	"network '%s' describes not a valid IPv4 network"),
1052	pDrvIns->iInstance, szNetwork);
1053
1054	char szNetAddr[16];
1055	RTStrPrintf(szNetAddr, sizeof(szNetAddr), "%d.%d.%d.%d",
1056	(Network & 0xFF000000) >> 24, (Network & 0xFF0000) >> 16,
1057	(Network & 0xFF00) >> 8, Network & 0xFF);
1058
1059	/*
1060	* Initialize slirp.
1061	*/
1062	rc = slirp_init(&pThis->pNATState, &szNetAddr[0], Netmask, fPassDomain, !!fUseHostResolver, pThis);
1063	if (RT_SUCCESS(rc))
1064	{
1065	slirp_set_dhcp_TFTP_prefix(pThis->pNATState, pThis->pszTFTPPrefix);
1066	slirp_set_dhcp_TFTP_bootfile(pThis->pNATState, pThis->pszBootFile);
1067	slirp_set_dhcp_next_server(pThis->pNATState, pThis->pszNextServer);
1068	slirp_set_dhcp_dns_proxy(pThis->pNATState, !!fDNSProxy);
1069	#ifdef VBOX_WITH_SLIRP_BSD_MBUF
1070	slirp_set_mtu(pThis->pNATState, MTU);
1071	#endif
1072	char *pszBindIP = NULL;
1073	GET_STRING_ALLOC(rc, pThis, pCfgHandle, "BindIP", pszBindIP);
1074	rc = slirp_set_binding_address(pThis->pNATState, pszBindIP);
1075	if (rc != 0)
1076	LogRel(("NAT: value of BindIP has been ignored\n"));
1077
1078	if(pszBindIP != NULL)
1079	MMR3HeapFree(pszBindIP);
1080	#define SLIRP_SET_TUNING_VALUE(name, setter) \
1081	do \
1082	{ \
1083	int len = 0; \
1084	rc = CFGMR3QueryS32(pCfgHandle, name, &len); \
1085	if (RT_SUCCESS(rc)) \
1086	setter(pThis->pNATState, len); \
1087	} while(0)
1088
1089	SLIRP_SET_TUNING_VALUE("SocketRcvBuf", slirp_set_rcvbuf);
1090	SLIRP_SET_TUNING_VALUE("SocketSndBuf", slirp_set_sndbuf);
1091	SLIRP_SET_TUNING_VALUE("TcpRcvSpace", slirp_set_tcp_rcvspace);
1092	SLIRP_SET_TUNING_VALUE("TcpSndSpace", slirp_set_tcp_sndspace);
1093
1094	slirp_register_statistics(pThis->pNATState, pDrvIns);
1095	#ifdef VBOX_WITH_STATISTICS
1096	# define DRV_PROFILE_COUNTER(name, dsc) REGISTER_COUNTER(name, pThis, STAMTYPE_PROFILE, STAMUNIT_TICKS_PER_CALL, dsc)
1097	# define DRV_COUNTING_COUNTER(name, dsc) REGISTER_COUNTER(name, pThis, STAMTYPE_COUNTER, STAMUNIT_COUNT, dsc)
1098	# include "counters.h"
1099	#endif
1100
1101	int rc2 = drvNATConstructRedir(pDrvIns->iInstance, pThis, pCfgHandle, Network);
1102	if (RT_SUCCESS(rc2))
1103	{
1104	/*
1105	* Register a load done notification to get the MAC address into the slirp
1106	* engine after we loaded a guest state.
1107	*/
1108	rc2 = PDMDrvHlpSSMRegisterLoadDone(pDrvIns, drvNATLoadDone);
1109	AssertRC(rc2);
1110	rc = RTReqCreateQueue(&pThis->pSlirpReqQueue);
1111	if (RT_FAILURE(rc))
1112	{
1113	LogRel(("NAT: Can't create request queue\n"));
1114	return rc;
1115	}
1116
1117
1118	rc = RTReqCreateQueue(&pThis->pRecvReqQueue);
1119	if (RT_FAILURE(rc))
1120	{
1121	LogRel(("NAT: Can't create request queue\n"));
1122	return rc;
1123	}
1124	rc = RTReqCreateQueue(&pThis->pUrgRecvReqQueue);
1125	if (RT_FAILURE(rc))
1126	{
1127	LogRel(("NAT: Can't create request queue\n"));
1128	return rc;
1129	}
1130	rc = PDMDrvHlpPDMThreadCreate(pDrvIns, &pThis->pRecvThread, pThis, drvNATRecv,
1131	drvNATRecvWakeup, 128 * _1K, RTTHREADTYPE_IO, "NATRX");
1132	AssertRC(rc);
1133	rc = RTSemEventCreate(&pThis->EventRecv);
1134
1135	rc = PDMDrvHlpPDMThreadCreate(pDrvIns, &pThis->pUrgRecvThread, pThis, drvNATUrgRecv,
1136	drvNATUrgRecvWakeup, 128 * _1K, RTTHREADTYPE_IO, "NATURGRX");
1137	AssertRC(rc);
1138	rc = RTSemEventCreate(&pThis->EventRecv);
1139	rc = RTSemEventCreate(&pThis->EventUrgRecv);
1140	rc = RTCritSectInit(&pThis->csDevAccess);
1141	rc = PDMDrvHlpTMTimerCreate(pThis->pDrvIns, TMCLOCK_REAL/enmClock/, drvNATSlowTimer,
1142	pThis, TMTIMER_FLAGS_NO_CRIT_SECT/flags/, "NATSlowTmr", &pThis->pTmrSlow);
1143	rc = PDMDrvHlpTMTimerCreate(pThis->pDrvIns, TMCLOCK_REAL/enmClock/, drvNATFastTimer,
1144	pThis, TMTIMER_FLAGS_NO_CRIT_SECT/flags/, "NATFastTmr", &pThis->pTmrFast);
1145
1146	#ifndef RT_OS_WINDOWS
1147	/*
1148	* Create the control pipe.
1149	*/
1150	int fds[2];
1151	if (pipe(&fds[0]) != 0) /** @todo RTPipeCreate() or something... */
1152	{
1153	int rc = RTErrConvertFromErrno(errno);
1154	AssertRC(rc);
1155	return rc;
1156	}
1157	pThis->PipeRead = fds[0];
1158	pThis->PipeWrite = fds[1];
1159	#else
1160	pThis->hWakeupEvent = CreateEvent(NULL, FALSE, FALSE, NULL); /* auto-reset event */
1161	slirp_register_external_event(pThis->pNATState, pThis->hWakeupEvent,
1162	VBOX_WAKEUP_EVENT_INDEX);
1163	#endif
1164
1165	rc = PDMDrvHlpPDMThreadCreate(pDrvIns, &pThis->pSlirpThread, pThis, drvNATAsyncIoThread,
1166	drvNATAsyncIoWakeup, 128 * _1K, RTTHREADTYPE_IO, "NAT");
1167	AssertRC(rc);
1168
1169	#ifdef VBOX_WITH_SLIRP_MT
1170	rc = PDMDrvHlpPDMThreadCreate(pDrvIns, &pThis->pGuestThread, pThis, drvNATAsyncIoGuest,
1171	drvNATAsyncIoGuestWakeup, 128 * _1K, RTTHREADTYPE_IO, "NATGUEST");
1172	AssertRC(rc);
1173	#endif
1174
1175	pThis->enmLinkState = PDMNETWORKLINKSTATE_UP;
1176
1177	/* might return VINF_NAT_DNS */
1178	return rc;
1179	}
1180	/* failure path */
1181	rc = rc2;
1182	slirp_term(pThis->pNATState);
1183	pThis->pNATState = NULL;
1184	}
1185	else
1186	{
1187	PDMDRV_SET_ERROR(pDrvIns, rc, N_("Unknown error during NAT networking setup: "));
1188	AssertMsgFailed(("Add error message for rc=%d (%Rrc)\n", rc, rc));
1189	}
1190
1191	return rc;
1192	}
1193
1194
1195	/**
1196	* NAT network transport driver registration record.
1197	*/
1198	const PDMDRVREG g_DrvNAT =
1199	{
1200	/* u32Version */
1201	PDM_DRVREG_VERSION,
1202	/* szDriverName */
1203	"NAT",
1204	/* pszDescription */
1205	"NAT Network Transport Driver",
1206	/* fFlags */
1207	PDM_DRVREG_FLAGS_HOST_BITS_DEFAULT,
1208	/* fClass. */
1209	PDM_DRVREG_CLASS_NETWORK,
1210	/* cMaxInstances */
1211	16,
1212	/* cbInstance */
1213	sizeof(DRVNAT),
1214	/* pfnConstruct */
1215	drvNATConstruct,
1216	/* pfnDestruct */
1217	drvNATDestruct,
1218	/* pfnIOCtl */
1219	NULL,
1220	/* pfnPowerOn */
1221	drvNATPowerOn,
1222	/* pfnReset */
1223	NULL,
1224	/* pfnSuspend */
1225	NULL,
1226	/* pfnResume */
1227	NULL,
1228	/* pfnAttach */
1229	NULL,
1230	/* pfnDetach */
1231	NULL,
1232	/* pfnPowerOff */
1233	NULL,
1234	/* pfnSoftReset */
1235	NULL,
1236	/* u32EndVersion */
1237	PDM_DRVREG_VERSION
1238	};
1239

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source: vbox/trunk/src/VBox/Devices/Network/DrvNAT.cpp@ 25276

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