DrvNAT.cpp@ 26309

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1	/* $Id: DrvNAT.cpp 26309 2010-02-05 21:13:17Z 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	if (ASMAtomicDecU32(&pThis->cUrgPkt) == 0)
313	{
314	drvNATRecvWakeup(pThis->pDrvIns, pThis->pRecvThread);
315	drvNATNotifyNATThread(pThis);
316	}
317	}
318
319
320	static DECLCALLBACK(void) drvNATRecvWorker(PDRVNAT pThis, uint8_t pu8Buf, int cb, void pvArg)
321	{
322	int rc;
323	STAM_PROFILE_START(&pThis->StatNATRecv, a);
324
325	STAM_PROFILE_START(&pThis->StatNATRecvWait, b);
326
327	while(ASMAtomicReadU32(&pThis->cUrgPkt) != 0)
328	{
329	rc = RTSemEventWait(pThis->EventRecv, RT_INDEFINITE_WAIT);
330	if ( RT_FAILURE(rc)
331	&& ( rc == VERR_TIMEOUT
332	\|\| rc == VERR_INTERRUPTED))
333	goto done_unlocked;
334	}
335
336	rc = RTCritSectEnter(&pThis->csDevAccess);
337
338	rc = pThis->pIAboveNet->pfnWaitReceiveAvail(pThis->pIAboveNet, RT_INDEFINITE_WAIT);
339	if (RT_SUCCESS(rc))
340	{
341	rc = pThis->pIAboveNet->pfnReceive(pThis->pIAboveNet, pu8Buf, cb);
342	AssertRC(rc);
343	}
344	else if ( RT_FAILURE(rc)
345	&& ( rc != VERR_TIMEOUT
346	&& rc != VERR_INTERRUPTED))
347	{
348	AssertRC(rc);
349	}
350
351	rc = RTCritSectLeave(&pThis->csDevAccess);
352	AssertRC(rc);
353	done_unlocked:
354	slirp_ext_m_free(pThis->pNATState, pvArg);
355	ASMAtomicDecU32(&pThis->cPkt);
356
357	drvNATNotifyNATThread(pThis);
358
359	STAM_PROFILE_STOP(&pThis->StatNATRecvWait, b);
360	STAM_PROFILE_STOP(&pThis->StatNATRecv, a);
361	}
362
363	/**
364	* Worker function for drvNATSend().
365	* @thread "NAT" thread.
366	*/
367	static void drvNATSendWorker(PDRVNAT pThis, void *pvBuf, size_t cb)
368	{
369	Assert(pThis->enmLinkState == PDMNETWORKLINKSTATE_UP);
370	if (pThis->enmLinkState == PDMNETWORKLINKSTATE_UP)
371	slirp_input(pThis->pNATState, pvBuf);
372	}
373
374
375	/**
376	* @interface_method_impl{PDMINETWORKUP,pfnSendDeprecated}
377	*/
378	static DECLCALLBACK(int) drvNATSendDeprecated(PPDMINETWORKUP pInterface, const void *pvBuf, size_t cb)
379	{
380	PDRVNAT pThis = PDMINETWORKUP_2_DRVNAT(pInterface);
381
382	LogFlow(("drvNATSend: pvBuf=%p cb=%#x\n", pvBuf, cb));
383	Log2(("drvNATSend: pvBuf=%p cb=%#x\n%.*Rhxd\n", pvBuf, cb, cb, pvBuf));
384
385	PRTREQ pReq = NULL;
386	int rc;
387	void *buf;
388
389	/* don't queue new requests when the NAT thread is about to stop */
390	if (pThis->pSlirpThread->enmState != PDMTHREADSTATE_RUNNING)
391	return VINF_SUCCESS;
392
393	#ifndef VBOX_WITH_SLIRP_MT
394	rc = RTReqAlloc(pThis->pSlirpReqQueue, &pReq, RTREQTYPE_INTERNAL);
395	#else
396	rc = RTReqAlloc((PRTREQQUEUE)slirp_get_queue(pThis->pNATState), &pReq, RTREQTYPE_INTERNAL);
397	#endif
398	AssertRC(rc);
399
400	/* @todo: Here we should get mbuf instead temporal buffer */
401	#if 0
402	buf = RTMemAlloc(cb);
403	if (buf == NULL)
404	{
405	LogRel(("NAT: Can't allocate send buffer\n"));
406	return VERR_NO_MEMORY;
407	}
408	memcpy(buf, pvBuf, cb);
409	#else
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	#endif
414
415	pReq->u.Internal.pfn = (PFNRT)drvNATSendWorker;
416	pReq->u.Internal.cArgs = 2;
417	pReq->u.Internal.aArgs[0] = (uintptr_t)pThis;
418	pReq->u.Internal.aArgs[1] = (uintptr_t)pvmBuf;
419	pReq->fFlags = RTREQFLAGS_VOID\|RTREQFLAGS_NO_WAIT;
420
421	rc = RTReqQueue(pReq, 0); /* don't wait, we have to wakeup the NAT thread fist */
422	AssertRC(rc);
423	drvNATNotifyNATThread(pThis);
424	LogFlow(("drvNATSend: end\n"));
425	return VINF_SUCCESS;
426	}
427
428
429	/**
430	* Get the NAT thread out of poll/WSAWaitForMultipleEvents
431	*/
432	static void drvNATNotifyNATThread(PDRVNAT pThis)
433	{
434	int rc;
435	#ifndef RT_OS_WINDOWS
436	/* kick select() */
437	rc = RTFileWrite(pThis->PipeWrite, "", 1, NULL);
438	#else
439	/* kick WSAWaitForMultipleEvents */
440	rc = WSASetEvent(pThis->hWakeupEvent);
441	#endif
442	AssertRC(rc);
443	}
444
445
446	/**
447	* @interface_method_impl{PDMINETWORKUP,pfnSetPromiscuousMode}
448	*/
449	static DECLCALLBACK(void) drvNATSetPromiscuousMode(PPDMINETWORKUP pInterface, bool fPromiscuous)
450	{
451	LogFlow(("drvNATSetPromiscuousMode: fPromiscuous=%d\n", fPromiscuous));
452	/* nothing to do */
453	}
454
455	/**
456	* Worker function for drvNATNotifyLinkChanged().
457	* @thread "NAT" thread.
458	*/
459	static void drvNATNotifyLinkChangedWorker(PDRVNAT pThis, PDMNETWORKLINKSTATE enmLinkState)
460	{
461	pThis->enmLinkState = enmLinkState;
462
463	switch (enmLinkState)
464	{
465	case PDMNETWORKLINKSTATE_UP:
466	LogRel(("NAT: link up\n"));
467	slirp_link_up(pThis->pNATState);
468	break;
469
470	case PDMNETWORKLINKSTATE_DOWN:
471	case PDMNETWORKLINKSTATE_DOWN_RESUME:
472	LogRel(("NAT: link down\n"));
473	slirp_link_down(pThis->pNATState);
474	break;
475
476	default:
477	AssertMsgFailed(("drvNATNotifyLinkChanged: unexpected link state %d\n", enmLinkState));
478	}
479	}
480
481
482	/**
483	* Notification on link status changes.
484	*
485	* @param pInterface Pointer to the interface structure containing the called function pointer.
486	* @param enmLinkState The new link state.
487	* @thread EMT
488	*/
489	static DECLCALLBACK(void) drvNATNotifyLinkChanged(PPDMINETWORKUP pInterface, PDMNETWORKLINKSTATE enmLinkState)
490	{
491	PDRVNAT pThis = PDMINETWORKUP_2_DRVNAT(pInterface);
492
493	LogFlow(("drvNATNotifyLinkChanged: enmLinkState=%d\n", enmLinkState));
494
495	PRTREQ pReq = NULL;
496
497	/* don't queue new requests when the NAT thread is about to stop */
498	if (pThis->pSlirpThread->enmState != PDMTHREADSTATE_RUNNING)
499	return;
500
501	int rc = RTReqAlloc(pThis->pSlirpReqQueue, &pReq, RTREQTYPE_INTERNAL);
502	AssertRC(rc);
503	pReq->u.Internal.pfn = (PFNRT)drvNATNotifyLinkChangedWorker;
504	pReq->u.Internal.cArgs = 2;
505	pReq->u.Internal.aArgs[0] = (uintptr_t)pThis;
506	pReq->u.Internal.aArgs[1] = (uintptr_t)enmLinkState;
507	pReq->fFlags = RTREQFLAGS_VOID;
508	rc = RTReqQueue(pReq, 0); /* don't wait, we have to wakeup the NAT thread fist */
509	if (RT_LIKELY(rc == VERR_TIMEOUT))
510	{
511	drvNATNotifyNATThread(pThis);
512	rc = RTReqWait(pReq, RT_INDEFINITE_WAIT);
513	AssertRC(rc);
514	}
515	else
516	AssertRC(rc);
517	RTReqFree(pReq);
518	}
519
520	/**
521	* NAT thread handling the slirp stuff. The slirp implementation is single-threaded
522	* so we execute this enginre in a dedicated thread. We take care that this thread
523	* does not become the bottleneck: If the guest wants to send, a request is enqueued
524	* into the pSlirpReqQueue and handled asynchronously by this thread. If this thread
525	* wants to deliver packets to the guest, it enqueues a request into pRecvReqQueue
526	* which is later handled by the Recv thread.
527	*/
528	static DECLCALLBACK(int) drvNATAsyncIoThread(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
529	{
530	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
531	int nFDs = -1;
532	int ms;
533	#ifdef RT_OS_WINDOWS
534	DWORD event;
535	HANDLE *phEvents;
536	unsigned int cBreak = 0;
537	#else /* RT_OS_WINDOWS */
538	struct pollfd *polls = NULL;
539	unsigned int cPollNegRet = 0;
540	#endif /* !RT_OS_WINDOWS */
541
542	LogFlow(("drvNATAsyncIoThread: pThis=%p\n", pThis));
543
544	if (pThread->enmState == PDMTHREADSTATE_INITIALIZING)
545	return VINF_SUCCESS;
546
547	#ifdef RT_OS_WINDOWS
548	phEvents = slirp_get_events(pThis->pNATState);
549	#endif /* RT_OS_WINDOWS */
550
551	/*
552	* Polling loop.
553	*/
554	while (pThread->enmState == PDMTHREADSTATE_RUNNING)
555	{
556	nFDs = -1;
557	/*
558	* To prevent concurent execution of sending/receving threads
559	*/
560	#ifndef RT_OS_WINDOWS
561	nFDs = slirp_get_nsock(pThis->pNATState);
562	polls = NULL;
563	/* allocation for all sockets + Management pipe */
564	polls = (struct pollfd )RTMemAlloc((1 + nFDs) sizeof(struct pollfd) + sizeof(uint32_t));
565	if (polls == NULL)
566	return VERR_NO_MEMORY;
567
568	/* don't pass the managemant pipe */
569	slirp_select_fill(pThis->pNATState, &nFDs, &polls[1]);
570	#if 0
571	ms = slirp_get_timeout_ms(pThis->pNATState);
572	#else
573	ms = 0;
574	#endif
575
576	polls[0].fd = pThis->PipeRead;
577	/* POLLRDBAND usually doesn't used on Linux but seems used on Solaris */
578	polls[0].events = POLLRDNORM\|POLLPRI\|POLLRDBAND;
579	polls[0].revents = 0;
580
581	int cChangedFDs = poll(polls, nFDs + 1, ms ? ms : -1);
582	if (cChangedFDs < 0)
583	{
584	if (errno == EINTR)
585	{
586	Log2(("NAT: signal was caught while sleep on poll\n"));
587	/* No error, just process all outstanding requests but don't wait */
588	cChangedFDs = 0;
589	}
590	else if (cPollNegRet++ > 128)
591	{
592	LogRel(("NAT:Poll returns (%s) suppressed %d\n", strerror(errno), cPollNegRet));
593	cPollNegRet = 0;
594	}
595	}
596
597	if (cChangedFDs >= 0)
598	{
599	slirp_select_poll(pThis->pNATState, &polls[1], nFDs);
600	if (polls[0].revents & (POLLRDNORM\|POLLPRI\|POLLRDBAND))
601	{
602	/* drain the pipe */
603	char ch[1];
604	size_t cbRead;
605	int counter = 0;
606	/*
607	* drvNATSend decoupled so we don't know how many times
608	* device's thread sends before we've entered multiplex,
609	* so to avoid false alarm drain pipe here to the very end
610	*
611	* @todo: Probably we should counter drvNATSend to count how
612	* deep pipe has been filed before drain.
613	*
614	* XXX:Make it reading exactly we need to drain the pipe.
615	*/
616	RTFileRead(pThis->PipeRead, &ch, 1, &cbRead);
617	}
618	}
619	/* process _all_ outstanding requests but don't wait */
620	RTReqProcess(pThis->pSlirpReqQueue, 0);
621	RTMemFree(polls);
622	#else /* RT_OS_WINDOWS */
623	slirp_select_fill(pThis->pNATState, &nFDs);
624	#if 0
625	ms = slirp_get_timeout_ms(pThis->pNATState);
626	#else
627	ms = 0;
628	#endif
629	struct timeval tv = { 0, ms*1000 };
630	event = WSAWaitForMultipleEvents(nFDs, phEvents, FALSE, ms ? ms : WSA_INFINITE, FALSE);
631	if ( (event < WSA_WAIT_EVENT_0 \|\| event > WSA_WAIT_EVENT_0 + nFDs - 1)
632	&& event != WSA_WAIT_TIMEOUT)
633	{
634	int error = WSAGetLastError();
635	LogRel(("NAT: WSAWaitForMultipleEvents returned %d (error %d)\n", event, error));
636	RTAssertPanic();
637	}
638
639	if (event == WSA_WAIT_TIMEOUT)
640	{
641	/* only check for slow/fast timers */
642	slirp_select_poll(pThis->pNATState, /* fTimeout=/true, /fIcmp=*/false);
643	continue;
644	}
645	/* poll the sockets in any case */
646	Log2(("%s: poll\n", __FUNCTION__));
647	slirp_select_poll(pThis->pNATState, /* fTimeout=/false, / fIcmp=*/(event == WSA_WAIT_EVENT_0));
648	/* process _all_ outstanding requests but don't wait */
649	RTReqProcess(pThis->pSlirpReqQueue, 0);
650	# ifdef VBOX_NAT_DELAY_HACK
651	if (cBreak++ > 128)
652	{
653	cBreak = 0;
654	RTThreadSleep(2);
655	}
656	# endif
657	#endif /* RT_OS_WINDOWS */
658	}
659
660	return VINF_SUCCESS;
661	}
662
663
664	/**
665	* Unblock the send thread so it can respond to a state change.
666	*
667	* @returns VBox status code.
668	* @param pDevIns The pcnet device instance.
669	* @param pThread The send thread.
670	*/
671	static DECLCALLBACK(int) drvNATAsyncIoWakeup(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
672	{
673	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
674
675	drvNATNotifyNATThread(pThis);
676	return VINF_SUCCESS;
677	}
678
679	#ifdef VBOX_WITH_SLIRP_MT
680
681	static DECLCALLBACK(int) drvNATAsyncIoGuest(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
682	{
683	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
684
685	if (pThread->enmState == PDMTHREADSTATE_INITIALIZING)
686	return VINF_SUCCESS;
687
688	while (pThread->enmState == PDMTHREADSTATE_RUNNING)
689	slirp_process_queue(pThis->pNATState);
690
691	return VINF_SUCCESS;
692	}
693
694
695	static DECLCALLBACK(int) drvNATAsyncIoGuestWakeup(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
696	{
697	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
698
699	return VINF_SUCCESS;
700	}
701
702	#endif /* VBOX_WITH_SLIRP_MT */
703
704	void slirp_arm_fast_timer(void *pvUser)
705	{
706	PDRVNAT pThis = (PDRVNAT)pvUser;
707	Assert(pThis);
708	TMTimerSetMillies(pThis->pTmrFast, 2);
709	}
710
711	void slirp_arm_slow_timer(void *pvUser)
712	{
713	PDRVNAT pThis = (PDRVNAT)pvUser;
714	Assert(pThis);
715	TMTimerSetMillies(pThis->pTmrSlow, 500);
716	}
717
718	/**
719	* Function called by slirp to check if it's possible to feed incoming data to the network port.
720	* @returns 1 if possible.
721	* @returns 0 if not possible.
722	*/
723	int slirp_can_output(void *pvUser)
724	{
725	return 1;
726	}
727
728	void slirp_push_recv_thread(void *pvUser)
729	{
730	PDRVNAT pThis = (PDRVNAT)pvUser;
731	Assert(pThis);
732	drvNATUrgRecvWakeup(pThis->pDrvIns, pThis->pUrgRecvThread);
733	}
734
735	void slirp_urg_output(void pvUser, void pvArg, const uint8_t *pu8Buf, int cb)
736	{
737	PDRVNAT pThis = (PDRVNAT)pvUser;
738	Assert(pThis);
739
740	PRTREQ pReq = NULL;
741
742	/* don't queue new requests when the NAT thread is about to stop */
743	if (pThis->pSlirpThread->enmState != PDMTHREADSTATE_RUNNING)
744	return;
745
746	int rc = RTReqAlloc(pThis->pUrgRecvReqQueue, &pReq, RTREQTYPE_INTERNAL);
747	AssertRC(rc);
748	ASMAtomicIncU32(&pThis->cUrgPkt);
749	pReq->u.Internal.pfn = (PFNRT)drvNATUrgRecvWorker;
750	pReq->u.Internal.cArgs = 4;
751	pReq->u.Internal.aArgs[0] = (uintptr_t)pThis;
752	pReq->u.Internal.aArgs[1] = (uintptr_t)pu8Buf;
753	pReq->u.Internal.aArgs[2] = (uintptr_t)cb;
754	pReq->u.Internal.aArgs[3] = (uintptr_t)pvArg;
755	pReq->fFlags = RTREQFLAGS_VOID\|RTREQFLAGS_NO_WAIT;
756	rc = RTReqQueue(pReq, 0);
757	AssertRC(rc);
758	drvNATUrgRecvWakeup(pThis->pDrvIns, pThis->pUrgRecvThread);
759	}
760
761	/**
762	* Function called by slirp to feed incoming data to the network port.
763	*/
764	void slirp_output(void pvUser, void pvArg, const uint8_t *pu8Buf, int cb)
765	{
766	PDRVNAT pThis = (PDRVNAT)pvUser;
767	Assert(pThis);
768
769	LogFlow(("slirp_output BEGIN %x %d\n", pu8Buf, cb));
770	Log2(("slirp_output: pu8Buf=%p cb=%#x (pThis=%p)\n%.*Rhxd\n", pu8Buf, cb, pThis, cb, pu8Buf));
771
772	PRTREQ pReq = NULL;
773
774	/* don't queue new requests when the NAT thread is about to stop */
775	if (pThis->pSlirpThread->enmState != PDMTHREADSTATE_RUNNING)
776	return;
777
778	int rc = RTReqAlloc(pThis->pRecvReqQueue, &pReq, RTREQTYPE_INTERNAL);
779	AssertRC(rc);
780	ASMAtomicIncU32(&pThis->cPkt);
781	pReq->u.Internal.pfn = (PFNRT)drvNATRecvWorker;
782	pReq->u.Internal.cArgs = 4;
783	pReq->u.Internal.aArgs[0] = (uintptr_t)pThis;
784	pReq->u.Internal.aArgs[1] = (uintptr_t)pu8Buf;
785	pReq->u.Internal.aArgs[2] = (uintptr_t)cb;
786	pReq->u.Internal.aArgs[3] = (uintptr_t)pvArg;
787	pReq->fFlags = RTREQFLAGS_VOID\|RTREQFLAGS_NO_WAIT;
788	rc = RTReqQueue(pReq, 0);
789	AssertRC(rc);
790	drvNATRecvWakeup(pThis->pDrvIns, pThis->pRecvThread);
791	STAM_COUNTER_INC(&pThis->StatQueuePktSent);
792	}
793
794
795	/**
796	* @interface_method_impl{PDMIBASE,pfnQueryInterface}
797	*/
798	static DECLCALLBACK(void ) drvNATQueryInterface(PPDMIBASE pInterface, const char pszIID)
799	{
800	PPDMDRVINS pDrvIns = PDMIBASE_2_PDMDRV(pInterface);
801	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
802
803	PDMIBASE_RETURN_INTERFACE(pszIID, PDMIBASE, &pDrvIns->IBase);
804	PDMIBASE_RETURN_INTERFACE(pszIID, PDMINETWORKUP, &pThis->INetworkUp);
805	return NULL;
806	}
807
808
809	/**
810	* Get the MAC address into the slirp stack.
811	*
812	* Called by drvNATLoadDone and drvNATPowerOn.
813	*/
814	static void drvNATSetMac(PDRVNAT pThis)
815	{
816	if (pThis->pIAboveConfig)
817	{
818	RTMAC Mac;
819	pThis->pIAboveConfig->pfnGetMac(pThis->pIAboveConfig, &Mac);
820	/* Re-activate the port forwarding. If */
821	slirp_set_ethaddr_and_activate_port_forwarding(pThis->pNATState, Mac.au8, pThis->GuestIP);
822	}
823	}
824
825
826	/**
827	* After loading we have to pass the MAC address of the ethernet device to the slirp stack.
828	* Otherwise the guest is not reachable until it performs a DHCP request or an ARP request
829	* (usually done during guest boot).
830	*/
831	static DECLCALLBACK(int) drvNATLoadDone(PPDMDRVINS pDrvIns, PSSMHANDLE pSSMHandle)
832	{
833	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
834	drvNATSetMac(pThis);
835	return VINF_SUCCESS;
836	}
837
838
839	/**
840	* Some guests might not use DHCP to retrieve an IP but use a static IP.
841	*/
842	static DECLCALLBACK(void) drvNATPowerOn(PPDMDRVINS pDrvIns)
843	{
844	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
845	drvNATSetMac(pThis);
846	}
847
848
849	/**
850	* Sets up the redirectors.
851	*
852	* @returns VBox status code.
853	* @param pCfg The configuration handle.
854	*/
855	static int drvNATConstructRedir(unsigned iInstance, PDRVNAT pThis, PCFGMNODE pCfg, RTIPV4ADDR Network)
856	{
857	RTMAC Mac;
858	memset(&Mac, 0, sizeof(RTMAC)); /can't get MAC here /
859	/*
860	* Enumerate redirections.
861	*/
862	for (PCFGMNODE pNode = CFGMR3GetFirstChild(pCfg); pNode; pNode = CFGMR3GetNextChild(pNode))
863	{
864	/*
865	* Validate the port forwarding config.
866	*/
867	if (!CFGMR3AreValuesValid(pNode, "Protocol\0UDP\0HostPort\0GuestPort\0GuestIP\0BindIP\0"))
868	return PDMDRV_SET_ERROR(pThis->pDrvIns, VERR_PDM_DRVINS_UNKNOWN_CFG_VALUES, N_("Unknown configuration in port forwarding"));
869
870	/* protocol type */
871	bool fUDP;
872	char szProtocol[32];
873	int rc;
874	GET_STRING(rc, pThis, pNode, "Protocol", szProtocol[0], sizeof(szProtocol));
875	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
876	{
877	fUDP = false;
878	GET_BOOL(rc, pThis, pNode, "UDP", fUDP);
879	}
880	else if (RT_SUCCESS(rc))
881	{
882	if (!RTStrICmp(szProtocol, "TCP"))
883	fUDP = false;
884	else if (!RTStrICmp(szProtocol, "UDP"))
885	fUDP = true;
886	else
887	return PDMDrvHlpVMSetError(pThis->pDrvIns, VERR_INVALID_PARAMETER, RT_SRC_POS,
888	N_("NAT#%d: Invalid configuration value for \"Protocol\": \"%s\""),
889	iInstance, szProtocol);
890	}
891	/* host port */
892	int32_t iHostPort;
893	GET_S32_STRICT(rc, pThis, pNode, "HostPort", iHostPort);
894
895	/* guest port */
896	int32_t iGuestPort;
897	GET_S32_STRICT(rc, pThis, pNode, "GuestPort", iGuestPort);
898
899	/* guest address */
900	struct in_addr GuestIP;
901	/* @todo (vvl) use CTL_* */
902	GETIP_DEF(rc, pThis, pNode, GuestIP, htonl(Network \| CTL_GUEST));
903
904	/* Store the guest IP for re-establishing the port-forwarding rules. Note that GuestIP
905	* is not documented. Without */
906	if (pThis->GuestIP == INADDR_ANY)
907	pThis->GuestIP = GuestIP.s_addr;
908
909	/*
910	* Call slirp about it.
911	*/
912	struct in_addr BindIP;
913	GETIP_DEF(rc, pThis, pNode, BindIP, INADDR_ANY);
914	if (slirp_redir(pThis->pNATState, fUDP, BindIP, iHostPort, GuestIP, iGuestPort, Mac.au8) < 0)
915	return PDMDrvHlpVMSetError(pThis->pDrvIns, VERR_NAT_REDIR_SETUP, RT_SRC_POS,
916	N_("NAT#%d: configuration error: failed to set up "
917	"redirection of %d to %d. Probably a conflict with "
918	"existing services or other rules"), iInstance, iHostPort,
919	iGuestPort);
920	} /* for each redir rule */
921
922	return VINF_SUCCESS;
923	}
924
925
926	/**
927	* Destruct a driver instance.
928	*
929	* Most VM resources are freed by the VM. This callback is provided so that any non-VM
930	* resources can be freed correctly.
931	*
932	* @param pDrvIns The driver instance data.
933	*/
934	static DECLCALLBACK(void) drvNATDestruct(PPDMDRVINS pDrvIns)
935	{
936	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
937	LogFlow(("drvNATDestruct:\n"));
938	PDMDRV_CHECK_VERSIONS_RETURN_VOID(pDrvIns);
939
940	slirp_term(pThis->pNATState);
941	slirp_deregister_statistics(pThis->pNATState, pDrvIns);
942	pThis->pNATState = NULL;
943	#ifdef VBOX_WITH_STATISTICS
944	# define DRV_PROFILE_COUNTER(name, dsc) DEREGISTER_COUNTER(name, pThis)
945	# define DRV_COUNTING_COUNTER(name, dsc) DEREGISTER_COUNTER(name, pThis)
946	# include "counters.h"
947	#endif
948	}
949
950
951	/**
952	* Construct a NAT network transport driver instance.
953	*
954	* @copydoc FNPDMDRVCONSTRUCT
955	*/
956	static DECLCALLBACK(int) drvNATConstruct(PPDMDRVINS pDrvIns, PCFGMNODE pCfg, uint32_t fFlags)
957	{
958	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
959	LogFlow(("drvNATConstruct:\n"));
960	PDMDRV_CHECK_VERSIONS_RETURN(pDrvIns);
961
962	/*
963	* Validate the config.
964	*/
965	if (!CFGMR3AreValuesValid(pCfg,
966	"PassDomain\0TFTPPrefix\0BootFile\0Network"
967	"\0NextServer\0DNSProxy\0BindIP\0UseHostResolver\0"
968	#ifdef VBOX_WITH_SLIRP_BSD_MBUF
969	"SlirpMTU\0"
970	#endif
971	"SocketRcvBuf\0SocketSndBuf\0TcpRcvSpace\0TcpSndSpace\0"))
972	return PDMDRV_SET_ERROR(pDrvIns, VERR_PDM_DRVINS_UNKNOWN_CFG_VALUES,
973	N_("Unknown NAT configuration option, only supports PassDomain,"
974	" TFTPPrefix, BootFile and Network"));
975
976	/*
977	* Init the static parts.
978	*/
979	pThis->pDrvIns = pDrvIns;
980	pThis->pNATState = NULL;
981	pThis->pszTFTPPrefix = NULL;
982	pThis->pszBootFile = NULL;
983	pThis->pszNextServer = NULL;
984	/* IBase */
985	pDrvIns->IBase.pfnQueryInterface = drvNATQueryInterface;
986	/* INetwork */
987	/** @todo implement the new INetworkUp interfaces. */
988	pThis->INetworkUp.pfnSendDeprecated = drvNATSendDeprecated;
989	pThis->INetworkUp.pfnSetPromiscuousMode = drvNATSetPromiscuousMode;
990	pThis->INetworkUp.pfnNotifyLinkChanged = drvNATNotifyLinkChanged;
991
992	/*
993	* Get the configuration settings.
994	*/
995	int rc;
996	bool fPassDomain = true;
997	GET_BOOL(rc, pThis, pCfg, "PassDomain", fPassDomain);
998
999	GET_STRING_ALLOC(rc, pThis, pCfg, "TFTPPrefix", pThis->pszTFTPPrefix);
1000	GET_STRING_ALLOC(rc, pThis, pCfg, "BootFile", pThis->pszBootFile);
1001	GET_STRING_ALLOC(rc, pThis, pCfg, "NextServer", pThis->pszNextServer);
1002
1003	int fDNSProxy = 0;
1004	GET_S32(rc, pThis, pCfg, "DNSProxy", fDNSProxy);
1005	int fUseHostResolver = 0;
1006	GET_S32(rc, pThis, pCfg, "UseHostResolver", fUseHostResolver);
1007	#ifdef VBOX_WITH_SLIRP_BSD_MBUF
1008	int MTU = 1500;
1009	GET_S32(rc, pThis, pCfg, "SlirpMTU", MTU);
1010	#endif
1011
1012	/*
1013	* Query the network port interface.
1014	*/
1015	pThis->pIAboveNet = PDMIBASE_QUERY_INTERFACE(pDrvIns->pUpBase, PDMINETWORKDOWN);
1016	if (!pThis->pIAboveNet)
1017	return PDMDRV_SET_ERROR(pDrvIns, VERR_PDM_MISSING_INTERFACE_ABOVE,
1018	N_("Configuration error: the above device/driver didn't "
1019	"export the network port interface"));
1020	pThis->pIAboveConfig = PDMIBASE_QUERY_INTERFACE(pDrvIns->pUpBase, PDMINETWORKCONFIG);
1021	if (!pThis->pIAboveConfig)
1022	return PDMDRV_SET_ERROR(pDrvIns, VERR_PDM_MISSING_INTERFACE_ABOVE,
1023	N_("Configuration error: the above device/driver didn't "
1024	"export the network config interface"));
1025
1026	/* Generate a network address for this network card. */
1027	char szNetwork[32]; /* xxx.xxx.xxx.xxx/yy */
1028	GET_STRING(rc, pThis, pCfg, "Network", szNetwork[0], sizeof(szNetwork));
1029	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
1030	RTStrPrintf(szNetwork, sizeof(szNetwork), "10.0.%d.0/24", pDrvIns->iInstance + 2);
1031
1032	RTIPV4ADDR Network;
1033	RTIPV4ADDR Netmask;
1034	rc = RTCidrStrToIPv4(szNetwork, &Network, &Netmask);
1035	if (RT_FAILURE(rc))
1036	return PDMDrvHlpVMSetError(pDrvIns, rc, RT_SRC_POS, N_("NAT#%d: Configuration error: "
1037	"network '%s' describes not a valid IPv4 network"),
1038	pDrvIns->iInstance, szNetwork);
1039
1040	char szNetAddr[16];
1041	RTStrPrintf(szNetAddr, sizeof(szNetAddr), "%d.%d.%d.%d",
1042	(Network & 0xFF000000) >> 24, (Network & 0xFF0000) >> 16,
1043	(Network & 0xFF00) >> 8, Network & 0xFF);
1044
1045	/*
1046	* Initialize slirp.
1047	*/
1048	rc = slirp_init(&pThis->pNATState, &szNetAddr[0], Netmask, fPassDomain, !!fUseHostResolver, pThis);
1049	if (RT_SUCCESS(rc))
1050	{
1051	slirp_set_dhcp_TFTP_prefix(pThis->pNATState, pThis->pszTFTPPrefix);
1052	slirp_set_dhcp_TFTP_bootfile(pThis->pNATState, pThis->pszBootFile);
1053	slirp_set_dhcp_next_server(pThis->pNATState, pThis->pszNextServer);
1054	slirp_set_dhcp_dns_proxy(pThis->pNATState, !!fDNSProxy);
1055	#ifdef VBOX_WITH_SLIRP_BSD_MBUF
1056	slirp_set_mtu(pThis->pNATState, MTU);
1057	#endif
1058	char *pszBindIP = NULL;
1059	GET_STRING_ALLOC(rc, pThis, pCfg, "BindIP", pszBindIP);
1060	rc = slirp_set_binding_address(pThis->pNATState, pszBindIP);
1061	if (rc != 0)
1062	LogRel(("NAT: value of BindIP has been ignored\n"));
1063
1064	if(pszBindIP != NULL)
1065	MMR3HeapFree(pszBindIP);
1066	#define SLIRP_SET_TUNING_VALUE(name, setter) \
1067	do \
1068	{ \
1069	int len = 0; \
1070	rc = CFGMR3QueryS32(pCfg, name, &len); \
1071	if (RT_SUCCESS(rc)) \
1072	setter(pThis->pNATState, len); \
1073	} while(0)
1074
1075	SLIRP_SET_TUNING_VALUE("SocketRcvBuf", slirp_set_rcvbuf);
1076	SLIRP_SET_TUNING_VALUE("SocketSndBuf", slirp_set_sndbuf);
1077	SLIRP_SET_TUNING_VALUE("TcpRcvSpace", slirp_set_tcp_rcvspace);
1078	SLIRP_SET_TUNING_VALUE("TcpSndSpace", slirp_set_tcp_sndspace);
1079
1080	slirp_register_statistics(pThis->pNATState, pDrvIns);
1081	#ifdef VBOX_WITH_STATISTICS
1082	# define DRV_PROFILE_COUNTER(name, dsc) REGISTER_COUNTER(name, pThis, STAMTYPE_PROFILE, STAMUNIT_TICKS_PER_CALL, dsc)
1083	# define DRV_COUNTING_COUNTER(name, dsc) REGISTER_COUNTER(name, pThis, STAMTYPE_COUNTER, STAMUNIT_COUNT, dsc)
1084	# include "counters.h"
1085	#endif
1086
1087	int rc2 = drvNATConstructRedir(pDrvIns->iInstance, pThis, pCfg, Network);
1088	if (RT_SUCCESS(rc2))
1089	{
1090	/*
1091	* Register a load done notification to get the MAC address into the slirp
1092	* engine after we loaded a guest state.
1093	*/
1094	rc2 = PDMDrvHlpSSMRegisterLoadDone(pDrvIns, drvNATLoadDone);
1095	AssertRC(rc2);
1096	rc = RTReqCreateQueue(&pThis->pSlirpReqQueue);
1097	if (RT_FAILURE(rc))
1098	{
1099	LogRel(("NAT: Can't create request queue\n"));
1100	return rc;
1101	}
1102
1103
1104	rc = RTReqCreateQueue(&pThis->pRecvReqQueue);
1105	if (RT_FAILURE(rc))
1106	{
1107	LogRel(("NAT: Can't create request queue\n"));
1108	return rc;
1109	}
1110	rc = RTReqCreateQueue(&pThis->pUrgRecvReqQueue);
1111	if (RT_FAILURE(rc))
1112	{
1113	LogRel(("NAT: Can't create request queue\n"));
1114	return rc;
1115	}
1116	rc = PDMDrvHlpPDMThreadCreate(pDrvIns, &pThis->pRecvThread, pThis, drvNATRecv,
1117	drvNATRecvWakeup, 128 * _1K, RTTHREADTYPE_IO, "NATRX");
1118	AssertRC(rc);
1119	rc = RTSemEventCreate(&pThis->EventRecv);
1120
1121	rc = PDMDrvHlpPDMThreadCreate(pDrvIns, &pThis->pUrgRecvThread, pThis, drvNATUrgRecv,
1122	drvNATUrgRecvWakeup, 128 * _1K, RTTHREADTYPE_IO, "NATURGRX");
1123	AssertRC(rc);
1124	rc = RTSemEventCreate(&pThis->EventRecv);
1125	rc = RTSemEventCreate(&pThis->EventUrgRecv);
1126	rc = RTCritSectInit(&pThis->csDevAccess);
1127	rc = PDMDrvHlpTMTimerCreate(pThis->pDrvIns, TMCLOCK_REAL/enmClock/, drvNATSlowTimer,
1128	pThis, TMTIMER_FLAGS_NO_CRIT_SECT/flags/, "NATSlowTmr", &pThis->pTmrSlow);
1129	rc = PDMDrvHlpTMTimerCreate(pThis->pDrvIns, TMCLOCK_REAL/enmClock/, drvNATFastTimer,
1130	pThis, TMTIMER_FLAGS_NO_CRIT_SECT/flags/, "NATFastTmr", &pThis->pTmrFast);
1131
1132	#ifndef RT_OS_WINDOWS
1133	/*
1134	* Create the control pipe.
1135	*/
1136	int fds[2];
1137	if (pipe(&fds[0]) != 0) /** @todo RTPipeCreate() or something... */
1138	{
1139	rc = RTErrConvertFromErrno(errno);
1140	AssertRC(rc);
1141	return rc;
1142	}
1143	pThis->PipeRead = fds[0];
1144	pThis->PipeWrite = fds[1];
1145	#else
1146	pThis->hWakeupEvent = CreateEvent(NULL, FALSE, FALSE, NULL); /* auto-reset event */
1147	slirp_register_external_event(pThis->pNATState, pThis->hWakeupEvent,
1148	VBOX_WAKEUP_EVENT_INDEX);
1149	#endif
1150
1151	rc = PDMDrvHlpPDMThreadCreate(pDrvIns, &pThis->pSlirpThread, pThis, drvNATAsyncIoThread,
1152	drvNATAsyncIoWakeup, 128 * _1K, RTTHREADTYPE_IO, "NAT");
1153	AssertRC(rc);
1154
1155	#ifdef VBOX_WITH_SLIRP_MT
1156	rc = PDMDrvHlpPDMThreadCreate(pDrvIns, &pThis->pGuestThread, pThis, drvNATAsyncIoGuest,
1157	drvNATAsyncIoGuestWakeup, 128 * _1K, RTTHREADTYPE_IO, "NATGUEST");
1158	AssertRC(rc);
1159	#endif
1160
1161	pThis->enmLinkState = PDMNETWORKLINKSTATE_UP;
1162
1163	/* might return VINF_NAT_DNS */
1164	return rc;
1165	}
1166	/* failure path */
1167	rc = rc2;
1168	slirp_term(pThis->pNATState);
1169	pThis->pNATState = NULL;
1170	}
1171	else
1172	{
1173	PDMDRV_SET_ERROR(pDrvIns, rc, N_("Unknown error during NAT networking setup: "));
1174	AssertMsgFailed(("Add error message for rc=%d (%Rrc)\n", rc, rc));
1175	}
1176
1177	return rc;
1178	}
1179
1180
1181	/**
1182	* NAT network transport driver registration record.
1183	*/
1184	const PDMDRVREG g_DrvNAT =
1185	{
1186	/* u32Version */
1187	PDM_DRVREG_VERSION,
1188	/* szName */
1189	"NAT",
1190	/* szRCMod */
1191	"",
1192	/* szR0Mod */
1193	"",
1194	/* pszDescription */
1195	"NAT Network Transport Driver",
1196	/* fFlags */
1197	PDM_DRVREG_FLAGS_HOST_BITS_DEFAULT,
1198	/* fClass. */
1199	PDM_DRVREG_CLASS_NETWORK,
1200	/* cMaxInstances */
1201	16,
1202	/* cbInstance */
1203	sizeof(DRVNAT),
1204	/* pfnConstruct */
1205	drvNATConstruct,
1206	/* pfnDestruct */
1207	drvNATDestruct,
1208	/* pfnRelocate */
1209	NULL,
1210	/* pfnIOCtl */
1211	NULL,
1212	/* pfnPowerOn */
1213	drvNATPowerOn,
1214	/* pfnReset */
1215	NULL,
1216	/* pfnSuspend */
1217	NULL,
1218	/* pfnResume */
1219	NULL,
1220	/* pfnAttach */
1221	NULL,
1222	/* pfnDetach */
1223	NULL,
1224	/* pfnPowerOff */
1225	NULL,
1226	/* pfnSoftReset */
1227	NULL,
1228	/* u32EndVersion */
1229	PDM_DRVREG_VERSION
1230	};
1231

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source: vbox/trunk/src/VBox/Devices/Network/DrvNAT.cpp@ 26309

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