DrvNAT.cpp@ 17386

Last change on this file since 17386 was 17386, checked in by vboxsync, 16 years ago
NAT: suppressing PDMQueus warning messages
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1	/** @file
2	*
3	* VBox network devices:
4	* NAT network transport driver
5	*/
6
7	/*
8	* Copyright (C) 2006-2007 Sun Microsystems, Inc.
9	*
10	* This file is part of VirtualBox Open Source Edition (OSE), as
11	* available from http://www.virtualbox.org. This file is free software;
12	* you can redistribute it and/or modify it under the terms of the GNU
13	* General Public License (GPL) as published by the Free Software
14	* Foundation, in version 2 as it comes in the "COPYING" file of the
15	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
16	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
17	*
18	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
19	* Clara, CA 95054 USA or visit http://www.sun.com if you need
20	* additional information or have any questions.
21	*/
22
23
24	/*******************************************************************************
25	* Header Files *
26	*******************************************************************************/
27	#define LOG_GROUP LOG_GROUP_DRV_NAT
28	#define __STDC_LIMIT_MACROS
29	#define __STDC_CONSTANT_MACROS
30	#include "Network/slirp/libslirp.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	#ifdef VBOX_WITH_SIMPLIFIED_SLIRP_SYNC
43	# ifndef RT_OS_WINDOWS
44	# include <unistd.h>
45	# include <fcntl.h>
46	# include <poll.h>
47	# endif
48	# include <errno.h>
49	# include <iprt/semaphore.h>
50	# include <iprt/req.h>
51	#endif
52
53	/**
54	* @todo: This is a bad hack to prevent freezing the guest during high network
55	* activity. This needs to be fixed properly.
56	*/
57	/#define VBOX_NAT_DELAY_HACK/
58
59
60	/*******************************************************************************
61	* Structures and Typedefs *
62	*******************************************************************************/
63	/**
64	* NAT network transport driver instance data.
65	*/
66	typedef struct DRVNAT
67	{
68	/** The network interface. */
69	PDMINETWORKCONNECTOR INetworkConnector;
70	/** The port we're attached to. */
71	PPDMINETWORKPORT pPort;
72	/** The network config of the port we're attached to. */
73	PPDMINETWORKCONFIG pConfig;
74	/** Pointer to the driver instance. */
75	PPDMDRVINS pDrvIns;
76	#ifndef VBOX_WITH_SIMPLIFIED_SLIRP_SYNC
77	/** Slirp critical section. */
78	RTCRITSECT CritSect;
79	#endif
80	/** Link state */
81	PDMNETWORKLINKSTATE enmLinkState;
82	/** NAT state for this instance. */
83	PNATState pNATState;
84	/** TFTP directory prefix. */
85	char *pszTFTPPrefix;
86	/** Boot file name to provide in the DHCP server response. */
87	char *pszBootFile;
88	#ifdef VBOX_WITH_SIMPLIFIED_SLIRP_SYNC
89	/* polling thread */
90	PPDMTHREAD pThread;
91	/** Queue for NAT-thread-external events. */
92	PRTREQQUEUE pReqQueue;
93	/* Send queue */
94	PPDMQUEUE pSendQueue;
95	# ifdef VBOX_WITH_SLIRP_MT
96	PPDMTHREAD pGuestThread;
97	# endif
98	# ifndef RT_OS_WINDOWS
99	/** The write end of the control pipe. */
100	RTFILE PipeWrite;
101	/** The read end of the control pipe. */
102	RTFILE PipeRead;
103	# else
104	/** for external notification */
105	HANDLE hWakeupEvent;
106	# endif
107	#endif
108	} DRVNAT, *PDRVNAT;
109
110	typedef struct DRVNATQUEUITEM
111	{
112	/** The core part owned by the queue manager. */
113	PDMQUEUEITEMCORE Core;
114	/** The buffer for output to guest. */
115	const uint8_t *pu8Buf;
116	/* size of buffer */
117	size_t cb;
118	void *mbuf;
119	} DRVNATQUEUITEM, *PDRVNATQUEUITEM;
120
121	/** Converts a pointer to NAT::INetworkConnector to a PRDVNAT. */
122	#define PDMINETWORKCONNECTOR_2_DRVNAT(pInterface) ( (PDRVNAT)((uintptr_t)pInterface - RT_OFFSETOF(DRVNAT, INetworkConnector)) )
123
124
125	/**
126	* Worker function for drvNATSend().
127	* @thread "NAT" thread.
128	*/
129	static void drvNATSendWorker(PDRVNAT pThis, const void *pvBuf, size_t cb)
130	{
131	Assert(pThis->enmLinkState == PDMNETWORKLINKSTATE_UP);
132	if (pThis->enmLinkState == PDMNETWORKLINKSTATE_UP)
133	slirp_input(pThis->pNATState, (uint8_t *)pvBuf, cb);
134	}
135
136	/**
137	* Send data to the network.
138	*
139	* @returns VBox status code.
140	* @param pInterface Pointer to the interface structure containing the called function pointer.
141	* @param pvBuf Data to send.
142	* @param cb Number of bytes to send.
143	* @thread EMT
144	*/
145	static DECLCALLBACK(int) drvNATSend(PPDMINETWORKCONNECTOR pInterface, const void *pvBuf, size_t cb)
146	{
147	PDRVNAT pThis = PDMINETWORKCONNECTOR_2_DRVNAT(pInterface);
148
149	LogFlow(("drvNATSend: pvBuf=%p cb=%#x\n", pvBuf, cb));
150	Log2(("drvNATSend: pvBuf=%p cb=%#x\n%.*Rhxd\n", pvBuf, cb, cb, pvBuf));
151
152	#ifdef VBOX_WITH_SIMPLIFIED_SLIRP_SYNC
153
154	PRTREQ pReq = NULL;
155	int rc;
156	void *buf;
157	/* don't queue new requests when the NAT thread is about to stop */
158	if (pThis->pThread->enmState != PDMTHREADSTATE_RUNNING)
159	return VINF_SUCCESS;
160	# ifndef VBOX_WITH_SLIRP_MT
161	rc = RTReqAlloc(pThis->pReqQueue, &pReq, RTREQTYPE_INTERNAL);
162	# else
163	rc = RTReqAlloc((PRTREQQUEUE)slirp_get_queue(pThis->pNATState), &pReq, RTREQTYPE_INTERNAL);
164	# endif
165	AssertReleaseRC(rc);
166
167	/* @todo: Here we should get mbuf instead temporal buffer */
168	buf = RTMemAlloc(cb);
169	if (buf == NULL)
170	{
171	LogRel(("NAT: Can't allocate send buffer\n"));
172	return VERR_NO_MEMORY;
173	}
174	memcpy(buf, pvBuf, cb);
175
176	pReq->u.Internal.pfn = (PFNRT)drvNATSendWorker;
177	pReq->u.Internal.cArgs = 3;
178	pReq->u.Internal.aArgs[0] = (uintptr_t)pThis;
179	pReq->u.Internal.aArgs[1] = (uintptr_t)buf;
180	pReq->u.Internal.aArgs[2] = (uintptr_t)cb;
181	pReq->fFlags = RTREQFLAGS_VOID\|RTREQFLAGS_NO_WAIT;
182
183	rc = RTReqQueue(pReq, 0); /* don't wait, we have to wakeup the NAT thread fist */
184	AssertReleaseRC(rc);
185	# ifndef RT_OS_WINDOWS
186	/* kick select() */
187	rc = RTFileWrite(pThis->PipeWrite, "", 1, NULL);
188	AssertRC(rc);
189	# else
190	/* kick WSAWaitForMultipleEvents */
191	rc = WSASetEvent(pThis->hWakeupEvent);
192	AssertRelease(rc == TRUE);
193	# endif
194
195	#else /* !VBOX_WITH_SIMPLIFIED_SLIRP_SYNC */
196
197	int rc = RTCritSectEnter(&pThis->CritSect);
198	AssertReleaseRC(rc);
199
200	drvNATSendWorker(pThis, pvBuf, cb);
201
202	RTCritSectLeave(&pThis->CritSect);
203
204	#endif /* !VBOX_WITH_SIMPLIFIED_SLIRP_SYNC */
205
206	LogFlow(("drvNATSend: end\n"));
207	return VINF_SUCCESS;
208	}
209
210
211	/**
212	* Set promiscuous mode.
213	*
214	* This is called when the promiscuous mode is set. This means that there doesn't have
215	* to be a mode change when it's called.
216	*
217	* @param pInterface Pointer to the interface structure containing the called function pointer.
218	* @param fPromiscuous Set if the adaptor is now in promiscuous mode. Clear if it is not.
219	* @thread EMT
220	*/
221	static DECLCALLBACK(void) drvNATSetPromiscuousMode(PPDMINETWORKCONNECTOR pInterface, bool fPromiscuous)
222	{
223	LogFlow(("drvNATSetPromiscuousMode: fPromiscuous=%d\n", fPromiscuous));
224	/* nothing to do */
225	}
226
227	/**
228	* Worker function for drvNATNotifyLinkChanged().
229	* @thread "NAT" thread.
230	*/
231	static void drvNATNotifyLinkChangedWorker(PDRVNAT pThis, PDMNETWORKLINKSTATE enmLinkState)
232	{
233	pThis->enmLinkState = enmLinkState;
234
235	switch (enmLinkState)
236	{
237	case PDMNETWORKLINKSTATE_UP:
238	LogRel(("NAT: link up\n"));
239	slirp_link_up(pThis->pNATState);
240	break;
241
242	case PDMNETWORKLINKSTATE_DOWN:
243	case PDMNETWORKLINKSTATE_DOWN_RESUME:
244	LogRel(("NAT: link down\n"));
245	slirp_link_down(pThis->pNATState);
246	break;
247
248	default:
249	AssertMsgFailed(("drvNATNotifyLinkChanged: unexpected link state %d\n", enmLinkState));
250	}
251	}
252
253	/**
254	* Notification on link status changes.
255	*
256	* @param pInterface Pointer to the interface structure containing the called function pointer.
257	* @param enmLinkState The new link state.
258	* @thread EMT
259	*/
260	static DECLCALLBACK(void) drvNATNotifyLinkChanged(PPDMINETWORKCONNECTOR pInterface, PDMNETWORKLINKSTATE enmLinkState)
261	{
262	PDRVNAT pThis = PDMINETWORKCONNECTOR_2_DRVNAT(pInterface);
263
264	LogFlow(("drvNATNotifyLinkChanged: enmLinkState=%d\n", enmLinkState));
265
266	#ifdef VBOX_WITH_SIMPLIFIED_SLIRP_SYNC
267
268	PRTREQ pReq = NULL;
269	/* don't queue new requests when the NAT thread is about to stop */
270	if (pThis->pThread->enmState != PDMTHREADSTATE_RUNNING)
271	return;
272	int rc = RTReqAlloc(pThis->pReqQueue, &pReq, RTREQTYPE_INTERNAL);
273	AssertReleaseRC(rc);
274	pReq->u.Internal.pfn = (PFNRT)drvNATNotifyLinkChangedWorker;
275	pReq->u.Internal.cArgs = 2;
276	pReq->u.Internal.aArgs[0] = (uintptr_t)pThis;
277	pReq->u.Internal.aArgs[1] = (uintptr_t)enmLinkState;
278	pReq->fFlags = RTREQFLAGS_VOID;
279	rc = RTReqQueue(pReq, 0); /* don't wait, we have to wakeup the NAT thread fist */
280	if (RT_LIKELY(rc == VERR_TIMEOUT))
281	{
282	# ifndef RT_OS_WINDOWS
283	/* kick select() */
284	rc = RTFileWrite(pThis->PipeWrite, "", 1, NULL);
285	AssertRC(rc);
286	# else
287	/* kick WSAWaitForMultipleEvents() */
288	rc = WSASetEvent(pThis->hWakeupEvent);
289	AssertRelease(rc == TRUE);
290	# endif
291	rc = RTReqWait(pReq, RT_INDEFINITE_WAIT);
292	AssertReleaseRC(rc);
293	}
294	else
295	AssertReleaseRC(rc);
296	RTReqFree(pReq);
297
298	#else /* !VBOX_WITH_SIMPLIFIED_SLIRP_SYNC */
299
300	int rc = RTCritSectEnter(&pThis->CritSect);
301	AssertReleaseRC(rc);
302	drvNATNotifyLinkChangedWorker(pThis, enmLinkState);
303	RTCritSectLeave(&pThis->CritSect);
304
305	#endif /* VBOX_WITH_SIMPLIFIED_SLIRP_SYNC */
306	}
307
308
309	#ifndef VBOX_WITH_SIMPLIFIED_SLIRP_SYNC
310
311	/**
312	* Poller callback.
313	*/
314	static DECLCALLBACK(void) drvNATPoller(PPDMDRVINS pDrvIns)
315	{
316	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
317	fd_set ReadFDs;
318	fd_set WriteFDs;
319	fd_set XcptFDs;
320	int nFDs = -1;
321	FD_ZERO(&ReadFDs);
322	FD_ZERO(&WriteFDs);
323	FD_ZERO(&XcptFDs);
324
325	int rc = RTCritSectEnter(&pThis->CritSect);
326	AssertReleaseRC(rc);
327
328	slirp_select_fill(pThis->pNATState, &nFDs, &ReadFDs, &WriteFDs, &XcptFDs);
329
330	struct timeval tv = {0, 0}; /* no wait */
331	int cChangedFDs = select(nFDs + 1, &ReadFDs, &WriteFDs, &XcptFDs, &tv);
332	if (cChangedFDs >= 0)
333	slirp_select_poll(pThis->pNATState, &nFDs, &ReadFDs, &WriteFDs, &XcptFDs);
334
335	RTCritSectLeave(&pThis->CritSect);
336	}
337
338	#else /* VBOX_WITH_SIMPLIFIED_SLIRP_SYNC */
339
340	static DECLCALLBACK(int) drvNATAsyncIoThread(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
341	{
342	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
343	int nFDs = -1;
344	unsigned int ms;
345	# ifdef RT_OS_WINDOWS
346	DWORD event;
347	HANDLE *phEvents;
348	unsigned int cBreak = 0;
349	# else /* RT_OS_WINDOWS */
350	struct pollfd *polls = NULL;
351	# endif /* !RT_OS_WINDOWS */
352
353	LogFlow(("drvNATAsyncIoThread: pThis=%p\n", pThis));
354
355	if (pThread->enmState == PDMTHREADSTATE_INITIALIZING)
356	return VINF_SUCCESS;
357
358	# ifdef RT_OS_WINDOWS
359	phEvents = slirp_get_events(pThis->pNATState);
360	# endif /* RT_OS_WINDOWS */
361
362	/*
363	* Polling loop.
364	*/
365	while (pThread->enmState == PDMTHREADSTATE_RUNNING)
366	{
367	nFDs = -1;
368
369	/*
370	* To prevent concurent execution of sending/receving threads
371	*/
372	# ifndef RT_OS_WINDOWS
373	nFDs = slirp_get_nsock(pThis->pNATState);
374	polls = NULL;
375	polls = (struct pollfd )RTMemAlloc((1 + nFDs) sizeof(struct pollfd) + sizeof(uint32_t)); /* allocation for all sockets + Management pipe*/
376	if (polls == NULL)
377	return VERR_NO_MEMORY;
378
379	slirp_select_fill(pThis->pNATState, &nFDs, &polls[1]); /don't bother Slirp with knowelege about managemant pipe/
380	ms = slirp_get_timeout_ms(pThis->pNATState);
381
382	polls[0].fd = pThis->PipeRead;
383	polls[0].events = POLLRDNORM\|POLLPRI\|POLLRDBAND; /* POLLRDBAND usually doesn't used on Linux but seems used on Solaris */
384	polls[0].revents = 0;
385
386	int cChangedFDs = poll(polls, nFDs + 1, ms ? ms : -1);
387	AssertRelease(cChangedFDs >= 0);
388	if (cChangedFDs >= 0)
389	{
390	slirp_select_poll(pThis->pNATState, &polls[1], nFDs);
391	if (polls[0].revents & (POLLRDNORM\|POLLPRI\|POLLRDBAND))
392	{
393	/* drain the pipe */
394	char ch[1];
395	size_t cbRead;
396	int counter = 0;
397	/*
398	* drvNATSend decoupled so we don't know how many times
399	* device's thread sends before we've entered multiplex,
400	* so to avoid false alarm drain pipe here to the very end
401	*
402	* @todo: Probably we should counter drvNATSend to count how
403	* deep pipe has been filed before drain.
404	*
405	* XXX:Make it reading exactly we need to drain the pipe.
406	*/
407	RTFileRead(pThis->PipeRead, &ch, 1, &cbRead);
408	}
409	/* process _all_ outstanding requests but don't wait */
410	RTReqProcess(pThis->pReqQueue, 0);
411	}
412	RTMemFree(polls);
413	# else /* RT_OS_WINDOWS */
414	slirp_select_fill(pThis->pNATState, &nFDs);
415	ms = slirp_get_timeout_ms(pThis->pNATState);
416	struct timeval tv = { 0, ms*1000 };
417	event = WSAWaitForMultipleEvents(nFDs, phEvents, FALSE, ms ? ms : WSA_INFINITE, FALSE);
418	if ( (event < WSA_WAIT_EVENT_0 \|\| event > WSA_WAIT_EVENT_0 + nFDs - 1)
419	&& event != WSA_WAIT_TIMEOUT)
420	{
421	int error = WSAGetLastError();
422	LogRel(("NAT: WSAWaitForMultipleEvents returned %d (error %d)\n", event, error));
423	RTAssertReleasePanic();
424	}
425
426	if (event == WSA_WAIT_TIMEOUT)
427	{
428	/* only check for slow/fast timers */
429	slirp_select_poll(pThis->pNATState, /* fTimeout=/true, /fIcmp=*/false);
430	Log2(("%s: timeout\n", __FUNCTION__));
431	continue;
432	}
433
434	/* poll the sockets in any case */
435	Log2(("%s: poll\n", __FUNCTION__));
436	slirp_select_poll(pThis->pNATState, /* fTimeout=/false, / fIcmp=*/(event == WSA_WAIT_EVENT_0));
437	/* process _all_ outstanding requests but don't wait */
438	RTReqProcess(pThis->pReqQueue, 0);
439	# ifdef VBOX_NAT_DELAY_HACK
440	if (cBreak++ > 128)
441	{
442	cBreak = 0;
443	RTThreadSleep(2);
444	}
445	# endif
446	# endif /* RT_OS_WINDOWS */
447	}
448
449	return VINF_SUCCESS;
450	}
451
452	/**
453	* Unblock the send thread so it can respond to a state change.
454	*
455	* @returns VBox status code.
456	* @param pDevIns The pcnet device instance.
457	* @param pThread The send thread.
458	*/
459	static DECLCALLBACK(int) drvNATAsyncIoWakeup(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
460	{
461	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
462
463	# ifndef RT_OS_WINDOWS
464	/* kick select() */
465	int rc = RTFileWrite(pThis->PipeWrite, "", 1, NULL);
466	AssertRC(rc);
467	# else /* !RT_OS_WINDOWS */
468	/* kick WSAWaitForMultipleEvents() */
469	WSASetEvent(pThis->hWakeupEvent);
470	# endif /* RT_OS_WINDOWS */
471
472	return VINF_SUCCESS;
473	}
474
475	# ifdef VBOX_WITH_SLIRP_MT
476	static DECLCALLBACK(int) drvNATAsyncIoGuest(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
477	{
478	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
479	if (pThread->enmState == PDMTHREADSTATE_INITIALIZING)
480	return VINF_SUCCESS;
481	while (pThread->enmState == PDMTHREADSTATE_RUNNING)
482	{
483	slirp_process_queue(pThis->pNATState);
484	}
485	return VINF_SUCCESS;
486	}
487
488	static DECLCALLBACK(int) drvNATAsyncIoGuestWakeup(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
489	{
490	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
491
492	return VINF_SUCCESS;
493	}
494	# endif /* VBOX_WITH_SLIRP_MT */
495
496	#endif /* VBOX_WITH_SIMPLIFIED_SLIRP_SYNC */
497
498
499	/**
500	* Function called by slirp to check if it's possible to feed incoming data to the network port.
501	* @returns 1 if possible.
502	* @returns 0 if not possible.
503	*/
504	int slirp_can_output(void *pvUser)
505	{
506	PDRVNAT pThis = (PDRVNAT)pvUser;
507
508	Assert(pThis);
509
510	#ifndef VBOX_WITH_SIMPLIFIED_SLIRP_SYNC
511	/** Happens during termination */
512	if (!RTCritSectIsOwner(&pThis->CritSect))
513	return 0;
514
515	int rc = pThis->pPort->pfnWaitReceiveAvail(pThis->pPort, 0);
516	return RT_SUCCESS(rc);
517	#else
518	return 1;
519	#endif
520	}
521
522
523	/**
524	* Function called by slirp to feed incoming data to the network port.
525	*/
526	#ifdef VBOX_WITH_SIMPLIFIED_SLIRP_SYNC
527	void slirp_output(void pvUser, void pvArg, const uint8_t *pu8Buf, int cb)
528	#else
529	void slirp_output(void pvUser, const uint8_t pu8Buf, int cb)
530	#endif
531	{
532	PDRVNAT pThis = (PDRVNAT)pvUser;
533
534	LogFlow(("slirp_output BEGIN %x %d\n", pu8Buf, cb));
535	Log2(("slirp_output: pu8Buf=%p cb=%#x (pThis=%p)\n%.*Rhxd\n", pu8Buf, cb, pThis, cb, pu8Buf));
536
537	Assert(pThis);
538
539	#ifndef VBOX_WITH_SIMPLIFIED_SLIRP_SYNC
540	/** Happens during termination */
541	if (!RTCritSectIsOwner(&pThis->CritSect))
542	return;
543
544	int rc = pThis->pPort->pfnReceive(pThis->pPort, pu8Buf, cb);
545	AssertRC(rc);
546	LogFlow(("slirp_output END %x %d\n", pu8Buf, cb));
547	#else
548
549	PDRVNATQUEUITEM pItem = (PDRVNATQUEUITEM)PDMQueueAlloc(pThis->pSendQueue);
550	if (pItem)
551	{
552	pItem->pu8Buf = pu8Buf;
553	pItem->cb = cb;
554	pItem->mbuf = pvArg;
555	Log2(("pItem:%p %.Rhxd\n", pItem, pItem->pu8Buf));
556	PDMQueueInsert(pThis->pSendQueue, &pItem->Core);
557	return;
558	}
559	static unsigned cDroppedPackets;
560	if (cDroppedPackets < 64)
561	{
562	cDroppedPackets++;
563	}
564	else
565	{
566	LogRel(("NAT: %d messages suppressed about dropping package (couldn't allocate queue item)\n", cDroppedPackets));
567	cDroppedPackets = 0;
568	}
569	RTMemFree((void *)pu8Buf);
570	#endif
571	}
572
573	#ifdef VBOX_WITH_SIMPLIFIED_SLIRP_SYNC
574	/**
575	* Queue callback for processing a queued item.
576	*
577	* @returns Success indicator.
578	* If false the item will not be removed and the flushing will stop.
579	* @param pDrvIns The driver instance.
580	* @param pItemCore Pointer to the queue item to process.
581	*/
582	static DECLCALLBACK(bool) drvNATQueueConsumer(PPDMDRVINS pDrvIns, PPDMQUEUEITEMCORE pItemCore)
583	{
584	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
585	PDRVNATQUEUITEM pItem = (PDRVNATQUEUITEM)pItemCore;
586	PRTREQ pReq = NULL;
587	Log(("drvNATQueueConsumer(pItem:%p, pu8Buf:%p, cb:%d)\n", pItem, pItem->pu8Buf, pItem->cb));
588	Log2(("drvNATQueueConsumer: pu8Buf:\n%.Rhxd\n", pItem->pu8Buf));
589	int rc = pThis->pPort->pfnWaitReceiveAvail(pThis->pPort, 0);
590	if (RT_FAILURE(rc))
591	return false;
592	rc = pThis->pPort->pfnReceive(pThis->pPort, pItem->pu8Buf, pItem->cb);
593
594	#if 0
595	rc = RTReqAlloc(pThis->pReqQueue, &pReq, RTREQTYPE_INTERNAL);
596	AssertReleaseRC(rc);
597	pReq->u.Internal.pfn = (PFNRT)slirp_post_sent;
598	pReq->u.Internal.cArgs = 2;
599	pReq->u.Internal.aArgs[0] = (uintptr_t)pThis->pNATState;
600	pReq->u.Internal.aArgs[1] = (uintptr_t)pItem->mbuf;
601	pReq->fFlags = RTREQFLAGS_VOID;
602	AssertRC(rc);
603	#else
604	/Copy buffer again, till seeking good way of syncronization with slirp mbuf management code/
605	AssertRelease(pItem->mbuf == NULL);
606	RTMemFree((void *)pItem->pu8Buf);
607	#endif
608	return RT_SUCCESS(rc);
609	}
610	#endif
611
612	/**
613	* Queries an interface to the driver.
614	*
615	* @returns Pointer to interface.
616	* @returns NULL if the interface was not supported by the driver.
617	* @param pInterface Pointer to this interface structure.
618	* @param enmInterface The requested interface identification.
619	* @thread Any thread.
620	*/
621	static DECLCALLBACK(void *) drvNATQueryInterface(PPDMIBASE pInterface, PDMINTERFACE enmInterface)
622	{
623	PPDMDRVINS pDrvIns = PDMIBASE_2_PDMDRV(pInterface);
624	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
625	switch (enmInterface)
626	{
627	case PDMINTERFACE_BASE:
628	return &pDrvIns->IBase;
629	case PDMINTERFACE_NETWORK_CONNECTOR:
630	return &pThis->INetworkConnector;
631	default:
632	return NULL;
633	}
634	}
635
636
637	/**
638	* Destruct a driver instance.
639	*
640	* Most VM resources are freed by the VM. This callback is provided so that any non-VM
641	* resources can be freed correctly.
642	*
643	* @param pDrvIns The driver instance data.
644	*/
645	static DECLCALLBACK(void) drvNATDestruct(PPDMDRVINS pDrvIns)
646	{
647	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
648
649	LogFlow(("drvNATDestruct:\n"));
650
651	#ifndef VBOX_WITH_SIMPLIFIED_SLIRP_SYNC
652	int rc = RTCritSectEnter(&pThis->CritSect);
653	AssertReleaseRC(rc);
654	#endif
655	slirp_term(pThis->pNATState);
656	pThis->pNATState = NULL;
657	#ifndef VBOX_WITH_SIMPLIFIED_SLIRP_SYNC
658	RTCritSectLeave(&pThis->CritSect);
659	RTCritSectDelete(&pThis->CritSect);
660	#endif
661	}
662
663
664	/**
665	* Sets up the redirectors.
666	*
667	* @returns VBox status code.
668	* @param pCfgHandle The drivers configuration handle.
669	*/
670	static int drvNATConstructRedir(unsigned iInstance, PDRVNAT pThis, PCFGMNODE pCfgHandle, RTIPV4ADDR Network)
671	{
672	/*
673	* Enumerate redirections.
674	*/
675	for (PCFGMNODE pNode = CFGMR3GetFirstChild(pCfgHandle); pNode; pNode = CFGMR3GetNextChild(pNode))
676	{
677	/*
678	* Validate the port forwarding config.
679	*/
680	if (!CFGMR3AreValuesValid(pNode, "Protocol\0UDP\0HostPort\0GuestPort\0GuestIP\0"))
681	return PDMDRV_SET_ERROR(pThis->pDrvIns, VERR_PDM_DRVINS_UNKNOWN_CFG_VALUES, N_("Unknown configuration in port forwarding"));
682
683	/* protocol type */
684	bool fUDP;
685	char szProtocol[32];
686	int rc = CFGMR3QueryString(pNode, "Protocol", &szProtocol[0], sizeof(szProtocol));
687	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
688	{
689	rc = CFGMR3QueryBool(pNode, "UDP", &fUDP);
690	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
691	fUDP = false;
692	else if (RT_FAILURE(rc))
693	return PDMDrvHlpVMSetError(pThis->pDrvIns, rc, RT_SRC_POS, N_("NAT#%d: configuration query for \"UDP\" boolean failed"), iInstance);
694	}
695	else if (RT_SUCCESS(rc))
696	{
697	if (!RTStrICmp(szProtocol, "TCP"))
698	fUDP = false;
699	else if (!RTStrICmp(szProtocol, "UDP"))
700	fUDP = true;
701	else
702	return PDMDrvHlpVMSetError(pThis->pDrvIns, VERR_INVALID_PARAMETER, RT_SRC_POS, N_("NAT#%d: Invalid configuration value for \"Protocol\": \"%s\""), iInstance, szProtocol);
703	}
704	else
705	return PDMDrvHlpVMSetError(pThis->pDrvIns, rc, RT_SRC_POS, N_("NAT#%d: configuration query for \"Protocol\" string failed"), iInstance);
706
707	/* host port */
708	int32_t iHostPort;
709	rc = CFGMR3QueryS32(pNode, "HostPort", &iHostPort);
710	if (RT_FAILURE(rc))
711	return PDMDrvHlpVMSetError(pThis->pDrvIns, rc, RT_SRC_POS, N_("NAT#%d: configuration query for \"HostPort\" integer failed"), iInstance);
712
713	/* guest port */
714	int32_t iGuestPort;
715	rc = CFGMR3QueryS32(pNode, "GuestPort", &iGuestPort);
716	if (RT_FAILURE(rc))
717	return PDMDrvHlpVMSetError(pThis->pDrvIns, rc, RT_SRC_POS, N_("NAT#%d: configuration query for \"GuestPort\" integer failed"), iInstance);
718
719	/* guest address */
720	char szGuestIP[32];
721	rc = CFGMR3QueryString(pNode, "GuestIP", &szGuestIP[0], sizeof(szGuestIP));
722	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
723	RTStrPrintf(szGuestIP, sizeof(szGuestIP), "%d.%d.%d.%d",
724	(Network & 0xFF000000) >> 24, (Network & 0xFF0000) >> 16, (Network & 0xFF00) >> 8, (Network & 0xE0) \| 15);
725	else if (RT_FAILURE(rc))
726	return PDMDrvHlpVMSetError(pThis->pDrvIns, rc, RT_SRC_POS, N_("NAT#%d: configuration query for \"GuestIP\" string failed"), iInstance);
727	struct in_addr GuestIP;
728	if (!inet_aton(szGuestIP, &GuestIP))
729	return PDMDrvHlpVMSetError(pThis->pDrvIns, VERR_NAT_REDIR_GUEST_IP, RT_SRC_POS,
730	N_("NAT#%d: configuration error: invalid \"GuestIP\"=\"%s\", inet_aton failed"), iInstance, szGuestIP);
731
732	/*
733	* Call slirp about it.
734	*/
735	Log(("drvNATConstruct: Redir %d -> %s:%d\n", iHostPort, szGuestIP, iGuestPort));
736	if (slirp_redir(pThis->pNATState, fUDP, iHostPort, GuestIP, iGuestPort) < 0)
737	return PDMDrvHlpVMSetError(pThis->pDrvIns, VERR_NAT_REDIR_SETUP, RT_SRC_POS,
738	N_("NAT#%d: configuration error: failed to set up redirection of %d to %s:%d. Probably a conflict with existing services or other rules"), iInstance, iHostPort, szGuestIP, iGuestPort);
739	} /* for each redir rule */
740
741	return VINF_SUCCESS;
742	}
743
744	/**
745	* Get the MAC address into the slirp stack.
746	*/
747	static void drvNATSetMac(PDRVNAT pThis)
748	{
749	if (pThis->pConfig)
750	{
751	RTMAC Mac;
752	pThis->pConfig->pfnGetMac(pThis->pConfig, &Mac);
753	slirp_set_ethaddr(pThis->pNATState, Mac.au8);
754	}
755	}
756
757
758	/**
759	* After loading we have to pass the MAC address of the ethernet device to the slirp stack.
760	* Otherwise the guest is not reachable until it performs a DHCP request or an ARP request
761	* (usually done during guest boot).
762	*/
763	static DECLCALLBACK(int) drvNATLoadDone(PPDMDRVINS pDrvIns, PSSMHANDLE pSSMHandle)
764	{
765	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
766	drvNATSetMac(pThis);
767	return VINF_SUCCESS;
768	}
769
770
771	/**
772	* Some guests might not use DHCP to retrieve an IP but use a static IP.
773	*/
774	static DECLCALLBACK(void) drvNATPowerOn(PPDMDRVINS pDrvIns)
775	{
776	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
777	drvNATSetMac(pThis);
778	}
779
780
781	/**
782	* Construct a NAT network transport driver instance.
783	*
784	* @returns VBox status.
785	* @param pDrvIns The driver instance data.
786	* If the registration structure is needed, pDrvIns->pDrvReg points to it.
787	* @param pCfgHandle Configuration node handle for the driver. Use this to obtain the configuration
788	* of the driver instance. It's also found in pDrvIns->pCfgHandle, but like
789	* iInstance it's expected to be used a bit in this function.
790	*/
791	static DECLCALLBACK(int) drvNATConstruct(PPDMDRVINS pDrvIns, PCFGMNODE pCfgHandle)
792	{
793	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
794	char szNetAddr[16];
795	char szNetwork[32]; /* xxx.xxx.xxx.xxx/yy */
796	LogFlow(("drvNATConstruct:\n"));
797
798	/*
799	* Validate the config.
800	*/
801	if (!CFGMR3AreValuesValid(pCfgHandle, "PassDomain\0TFTPPrefix\0BootFile\0Network\0"))
802	return PDMDRV_SET_ERROR(pDrvIns, VERR_PDM_DRVINS_UNKNOWN_CFG_VALUES, N_("Unknown NAT configuration option, only supports PassDomain, TFTPPrefix, BootFile and Network"));
803
804	/*
805	* Init the static parts.
806	*/
807	pThis->pDrvIns = pDrvIns;
808	pThis->pNATState = NULL;
809	pThis->pszTFTPPrefix = NULL;
810	pThis->pszBootFile = NULL;
811	/* IBase */
812	pDrvIns->IBase.pfnQueryInterface = drvNATQueryInterface;
813	/* INetwork */
814	pThis->INetworkConnector.pfnSend = drvNATSend;
815	pThis->INetworkConnector.pfnSetPromiscuousMode = drvNATSetPromiscuousMode;
816	pThis->INetworkConnector.pfnNotifyLinkChanged = drvNATNotifyLinkChanged;
817
818	/*
819	* Get the configuration settings.
820	*/
821	bool fPassDomain = true;
822	int rc = CFGMR3QueryBool(pCfgHandle, "PassDomain", &fPassDomain);
823	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
824	fPassDomain = true;
825	else if (RT_FAILURE(rc))
826	return PDMDrvHlpVMSetError(pDrvIns, rc, RT_SRC_POS, N_("NAT#%d: configuration query for \"PassDomain\" boolean failed"), pDrvIns->iInstance);
827
828	rc = CFGMR3QueryStringAlloc(pCfgHandle, "TFTPPrefix", &pThis->pszTFTPPrefix);
829	if (RT_FAILURE(rc) && rc != VERR_CFGM_VALUE_NOT_FOUND)
830	return PDMDrvHlpVMSetError(pDrvIns, rc, RT_SRC_POS, N_("NAT#%d: configuration query for \"TFTPPrefix\" string failed"), pDrvIns->iInstance);
831	rc = CFGMR3QueryStringAlloc(pCfgHandle, "BootFile", &pThis->pszBootFile);
832	if (RT_FAILURE(rc) && rc != VERR_CFGM_VALUE_NOT_FOUND)
833	return PDMDrvHlpVMSetError(pDrvIns, rc, RT_SRC_POS, N_("NAT#%d: configuration query for \"BootFile\" string failed"), pDrvIns->iInstance);
834
835	/*
836	* Query the network port interface.
837	*/
838	pThis->pPort = (PPDMINETWORKPORT)pDrvIns->pUpBase->pfnQueryInterface(pDrvIns->pUpBase, PDMINTERFACE_NETWORK_PORT);
839	if (!pThis->pPort)
840	return PDMDRV_SET_ERROR(pDrvIns, VERR_PDM_MISSING_INTERFACE_ABOVE,
841	N_("Configuration error: the above device/driver didn't export the network port interface"));
842	pThis->pConfig = (PPDMINETWORKCONFIG)pDrvIns->pUpBase->pfnQueryInterface(pDrvIns->pUpBase, PDMINTERFACE_NETWORK_CONFIG);
843	if (!pThis->pConfig)
844	return PDMDRV_SET_ERROR(pDrvIns, VERR_PDM_MISSING_INTERFACE_ABOVE,
845	N_("Configuration error: the above device/driver didn't export the network config interface"));
846
847	/* Generate a network address for this network card. */
848	rc = CFGMR3QueryString(pCfgHandle, "Network", szNetwork, sizeof(szNetwork));
849	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
850	RTStrPrintf(szNetwork, sizeof(szNetwork), "10.0.%d.0/24", pDrvIns->iInstance + 2);
851	else if (RT_FAILURE(rc))
852	return PDMDrvHlpVMSetError(pDrvIns, rc, RT_SRC_POS, N_("NAT#%d: configuration query for \"Network\" string failed"), pDrvIns->iInstance);
853
854	RTIPV4ADDR Network;
855	RTIPV4ADDR Netmask;
856	rc = RTCidrStrToIPv4(szNetwork, &Network, &Netmask);
857	if (RT_FAILURE(rc))
858	return PDMDrvHlpVMSetError(pDrvIns, rc, RT_SRC_POS, N_("NAT#%d: Configuration error: network '%s' describes not a valid IPv4 network"), pDrvIns->iInstance, szNetwork);
859
860	RTStrPrintf(szNetAddr, sizeof(szNetAddr), "%d.%d.%d.%d",
861	(Network & 0xFF000000) >> 24, (Network & 0xFF0000) >> 16, (Network & 0xFF00) >> 8, Network & 0xFF);
862
863	/*
864	* The slirp lock..
865	*/
866	#ifndef VBOX_WITH_SIMPLIFIED_SLIRP_SYNC
867	rc = RTCritSectInit(&pThis->CritSect);
868	if (RT_FAILURE(rc))
869	return rc;
870	#endif
871	/*
872	* Initialize slirp.
873	*/
874	rc = slirp_init(&pThis->pNATState, &szNetAddr[0], Netmask, fPassDomain, pThis->pszTFTPPrefix, pThis->pszBootFile, pThis);
875	if (RT_SUCCESS(rc))
876	{
877	slirp_register_timers(pThis->pNATState, pDrvIns);
878	int rc2 = drvNATConstructRedir(pDrvIns->iInstance, pThis, pCfgHandle, Network);
879	if (RT_SUCCESS(rc2))
880	{
881	/*
882	* Register a load done notification to get the MAC address into the slirp
883	* engine after we loaded a guest state.
884	*/
885	rc2 = PDMDrvHlpSSMRegister(pDrvIns, pDrvIns->pDrvReg->szDriverName,
886	pDrvIns->iInstance, 0, 0,
887	NULL, NULL, NULL, NULL, NULL, drvNATLoadDone);
888	AssertRC(rc2);
889	#ifndef VBOX_WITH_SIMPLIFIED_SLIRP_SYNC
890	pDrvIns->pDrvHlp->pfnPDMPollerRegister(pDrvIns, drvNATPoller);
891	#else
892	rc = RTReqCreateQueue(&pThis->pReqQueue);
893	if (RT_FAILURE(rc))
894	{
895	LogRel(("NAT: Can't create request queue\n"));
896	return rc;
897	}
898
899	rc = PDMDrvHlpPDMQueueCreate(pDrvIns, sizeof(DRVNATQUEUITEM), 50, 0, drvNATQueueConsumer, &pThis->pSendQueue);
900	if (RT_FAILURE(rc))
901	{
902	LogRel(("NAT: Can't create send queue\n"));
903	return rc;
904	}
905
906	# ifndef RT_OS_WINDOWS
907	/*
908	* Create the control pipe.
909	*/
910	int fds[2];
911	if (pipe(&fds[0]) != 0) /** @todo RTPipeCreate() or something... */
912	{
913	int rc = RTErrConvertFromErrno(errno);
914	AssertRC(rc);
915	return rc;
916	}
917	pThis->PipeRead = fds[0];
918	pThis->PipeWrite = fds[1];
919	# else
920	pThis->hWakeupEvent = CreateEvent(NULL, FALSE, FALSE, NULL); /* auto-reset event */
921	slirp_register_external_event(pThis->pNATState, pThis->hWakeupEvent, VBOX_WAKEUP_EVENT_INDEX);
922	# endif
923
924	rc = PDMDrvHlpPDMThreadCreate(pDrvIns, &pThis->pThread, pThis, drvNATAsyncIoThread, drvNATAsyncIoWakeup, 128 * _1K, RTTHREADTYPE_IO, "NAT");
925	AssertReleaseRC(rc);
926
927	#ifdef VBOX_WITH_SLIRP_MT
928	rc = PDMDrvHlpPDMThreadCreate(pDrvIns, &pThis->pGuestThread, pThis, drvNATAsyncIoGuest, drvNATAsyncIoGuestWakeup, 128 * _1K, RTTHREADTYPE_IO, "NATGUEST");
929	AssertReleaseRC(rc);
930	#endif
931	#endif
932
933	pThis->enmLinkState = PDMNETWORKLINKSTATE_UP;
934
935	/* might return VINF_NAT_DNS */
936	return rc;
937	}
938	/* failure path */
939	rc = rc2;
940	slirp_term(pThis->pNATState);
941	pThis->pNATState = NULL;
942	}
943	else
944	{
945	PDMDRV_SET_ERROR(pDrvIns, rc, N_("Unknown error during NAT networking setup: "));
946	AssertMsgFailed(("Add error message for rc=%d (%Rrc)\n", rc, rc));
947	}
948
949	#ifndef VBOX_WITH_SIMPLIFIED_SLIRP_SYNC
950	RTCritSectDelete(&pThis->CritSect);
951	#endif
952	return rc;
953	}
954
955
956	/**
957	* NAT network transport driver registration record.
958	*/
959	const PDMDRVREG g_DrvNAT =
960	{
961	/* u32Version */
962	PDM_DRVREG_VERSION,
963	/* szDriverName */
964	"NAT",
965	/* pszDescription */
966	"NAT Network Transport Driver",
967	/* fFlags */
968	PDM_DRVREG_FLAGS_HOST_BITS_DEFAULT,
969	/* fClass. */
970	PDM_DRVREG_CLASS_NETWORK,
971	/* cMaxInstances */
972	16,
973	/* cbInstance */
974	sizeof(DRVNAT),
975	/* pfnConstruct */
976	drvNATConstruct,
977	/* pfnDestruct */
978	drvNATDestruct,
979	/* pfnIOCtl */
980	NULL,
981	/* pfnPowerOn */
982	drvNATPowerOn,
983	/* pfnReset */
984	NULL,
985	/* pfnSuspend */
986	NULL,
987	/* pfnResume */
988	NULL,
989	/* pfnDetach */
990	NULL,
991	/* pfnPowerOff */
992	NULL
993	};

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source: vbox/trunk/src/VBox/Devices/Network/DrvNAT.cpp@ 17386

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