DrvNAT.cpp@ 23253

最後變更在這個檔案從23253是 23163,由 vboxsync 提交於 16 年前
NAT: introduces SlirpMTU extradata-parameter for altering slirp's mtu.
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1	/* $Id: DrvNAT.cpp 23163 2009-09-20 12:47:53Z 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.alldomusa.eu.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	/** event to wakeup the guest receive thread */
169	RTSEMEVENT EventRecv;
170	/** Receive Req queue (deliver packets to the guest) */
171	PRTREQQUEUE pRecvReqQueue;
172	} DRVNAT;
173	AssertCompileMemberAlignment(DRVNAT, StatNATRecvWakeups, 8);
174	/** Pointer the NAT driver instance data. */
175	typedef DRVNAT *PDRVNAT;
176
177	/**
178	* NAT queue item.
179	*/
180	typedef struct DRVNATQUEUITEM
181	{
182	/** The core part owned by the queue manager. */
183	PDMQUEUEITEMCORE Core;
184	/** The buffer for output to guest. */
185	const uint8_t *pu8Buf;
186	/* size of buffer */
187	size_t cb;
188	void *mbuf;
189	} DRVNATQUEUITEM;
190	/** Pointer to a NAT queue item. */
191	typedef DRVNATQUEUITEM *PDRVNATQUEUITEM;
192
193
194	static void drvNATNotifyNATThread(PDRVNAT pThis);
195
196
197	/** Converts a pointer to NAT::INetworkConnector to a PRDVNAT. */
198	#define PDMINETWORKCONNECTOR_2_DRVNAT(pInterface) ( (PDRVNAT)((uintptr_t)pInterface - RT_OFFSETOF(DRVNAT, INetworkConnector)) )
199
200
201
202	static DECLCALLBACK(int) drvNATRecv(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
203	{
204	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
205
206	if (pThread->enmState == PDMTHREADSTATE_INITIALIZING)
207	return VINF_SUCCESS;
208
209	while (pThread->enmState == PDMTHREADSTATE_RUNNING)
210	{
211	RTReqProcess(pThis->pRecvReqQueue, 0);
212	RTSemEventWait(pThis->EventRecv, RT_INDEFINITE_WAIT);
213	}
214	return VINF_SUCCESS;
215	}
216
217
218	static DECLCALLBACK(int) drvNATRecvWakeup(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
219	{
220	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
221	int rc = RTSemEventSignal(pThis->EventRecv);
222
223	STAM_COUNTER_INC(&pThis->StatNATRecvWakeups);
224	AssertReleaseRC(rc);
225	return VINF_SUCCESS;
226	}
227
228
229	static DECLCALLBACK(void) drvNATRecvWorker(PDRVNAT pThis, uint8_t *pu8Buf, int cb)
230	{
231	STAM_PROFILE_START(&pThis->StatNATRecv, a);
232
233	STAM_PROFILE_START(&pThis->StatNATRecvWait, b);
234	int rc = pThis->pPort->pfnWaitReceiveAvail(pThis->pPort, RT_INDEFINITE_WAIT);
235	AssertMsgRC(rc, ("NAT: No RX available even on indefinite wait; rc=%Rrc", rc));
236
237	STAM_PROFILE_STOP(&pThis->StatNATRecvWait, b);
238
239	rc = pThis->pPort->pfnReceive(pThis->pPort, pu8Buf, cb);
240	AssertRC(rc);
241	RTMemFree(pu8Buf);
242
243	STAM_PROFILE_STOP(&pThis->StatNATRecv, a);
244	}
245
246	/**
247	* Worker function for drvNATSend().
248	* @thread "NAT" thread.
249	*/
250	static void drvNATSendWorker(PDRVNAT pThis, const void *pvBuf, size_t cb)
251	{
252	Assert(pThis->enmLinkState == PDMNETWORKLINKSTATE_UP);
253	if (pThis->enmLinkState == PDMNETWORKLINKSTATE_UP)
254	slirp_input(pThis->pNATState, (uint8_t *)pvBuf, cb);
255	}
256
257
258	/**
259	* Called by the guest to send data to the network.
260	*
261	* @returns VBox status code.
262	* @param pInterface Pointer to the interface structure containing the called function pointer.
263	* @param pvBuf Data to send.
264	* @param cb Number of bytes to send.
265	* @thread EMT
266	*/
267	static DECLCALLBACK(int) drvNATSend(PPDMINETWORKCONNECTOR pInterface, const void *pvBuf, size_t cb)
268	{
269	PDRVNAT pThis = PDMINETWORKCONNECTOR_2_DRVNAT(pInterface);
270
271	LogFlow(("drvNATSend: pvBuf=%p cb=%#x\n", pvBuf, cb));
272	Log2(("drvNATSend: pvBuf=%p cb=%#x\n%.*Rhxd\n", pvBuf, cb, cb, pvBuf));
273
274	PRTREQ pReq = NULL;
275	int rc;
276	void *buf;
277
278	/* don't queue new requests when the NAT thread is about to stop */
279	if (pThis->pSlirpThread->enmState != PDMTHREADSTATE_RUNNING)
280	return VINF_SUCCESS;
281
282	#ifndef VBOX_WITH_SLIRP_MT
283	rc = RTReqAlloc(pThis->pSlirpReqQueue, &pReq, RTREQTYPE_INTERNAL);
284	#else
285	rc = RTReqAlloc((PRTREQQUEUE)slirp_get_queue(pThis->pNATState), &pReq, RTREQTYPE_INTERNAL);
286	#endif
287	AssertReleaseRC(rc);
288
289	/* @todo: Here we should get mbuf instead temporal buffer */
290	buf = RTMemAlloc(cb);
291	if (buf == NULL)
292	{
293	LogRel(("NAT: Can't allocate send buffer\n"));
294	return VERR_NO_MEMORY;
295	}
296	memcpy(buf, pvBuf, cb);
297
298	pReq->u.Internal.pfn = (PFNRT)drvNATSendWorker;
299	pReq->u.Internal.cArgs = 3;
300	pReq->u.Internal.aArgs[0] = (uintptr_t)pThis;
301	pReq->u.Internal.aArgs[1] = (uintptr_t)buf;
302	pReq->u.Internal.aArgs[2] = (uintptr_t)cb;
303	pReq->fFlags = RTREQFLAGS_VOID\|RTREQFLAGS_NO_WAIT;
304
305	rc = RTReqQueue(pReq, 0); /* don't wait, we have to wakeup the NAT thread fist */
306	AssertReleaseRC(rc);
307	drvNATNotifyNATThread(pThis);
308	LogFlow(("drvNATSend: end\n"));
309	return VINF_SUCCESS;
310	}
311
312
313	/**
314	* Get the NAT thread out of poll/WSAWaitForMultipleEvents
315	*/
316	static void drvNATNotifyNATThread(PDRVNAT pThis)
317	{
318	int rc;
319	#ifndef RT_OS_WINDOWS
320	/* kick select() */
321	rc = RTFileWrite(pThis->PipeWrite, "", 1, NULL);
322	#else
323	/* kick WSAWaitForMultipleEvents */
324	rc = WSASetEvent(pThis->hWakeupEvent);
325	#endif
326	AssertReleaseRC(rc);
327	}
328
329
330	/**
331	* Set promiscuous mode.
332	*
333	* This is called when the promiscuous mode is set. This means that there doesn't have
334	* to be a mode change when it's called.
335	*
336	* @param pInterface Pointer to the interface structure containing the called function pointer.
337	* @param fPromiscuous Set if the adaptor is now in promiscuous mode. Clear if it is not.
338	* @thread EMT
339	*/
340	static DECLCALLBACK(void) drvNATSetPromiscuousMode(PPDMINETWORKCONNECTOR pInterface, bool fPromiscuous)
341	{
342	LogFlow(("drvNATSetPromiscuousMode: fPromiscuous=%d\n", fPromiscuous));
343	/* nothing to do */
344	}
345
346	/**
347	* Worker function for drvNATNotifyLinkChanged().
348	* @thread "NAT" thread.
349	*/
350	static void drvNATNotifyLinkChangedWorker(PDRVNAT pThis, PDMNETWORKLINKSTATE enmLinkState)
351	{
352	pThis->enmLinkState = enmLinkState;
353
354	switch (enmLinkState)
355	{
356	case PDMNETWORKLINKSTATE_UP:
357	LogRel(("NAT: link up\n"));
358	slirp_link_up(pThis->pNATState);
359	break;
360
361	case PDMNETWORKLINKSTATE_DOWN:
362	case PDMNETWORKLINKSTATE_DOWN_RESUME:
363	LogRel(("NAT: link down\n"));
364	slirp_link_down(pThis->pNATState);
365	break;
366
367	default:
368	AssertMsgFailed(("drvNATNotifyLinkChanged: unexpected link state %d\n", enmLinkState));
369	}
370	}
371
372
373	/**
374	* Notification on link status changes.
375	*
376	* @param pInterface Pointer to the interface structure containing the called function pointer.
377	* @param enmLinkState The new link state.
378	* @thread EMT
379	*/
380	static DECLCALLBACK(void) drvNATNotifyLinkChanged(PPDMINETWORKCONNECTOR pInterface, PDMNETWORKLINKSTATE enmLinkState)
381	{
382	PDRVNAT pThis = PDMINETWORKCONNECTOR_2_DRVNAT(pInterface);
383
384	LogFlow(("drvNATNotifyLinkChanged: enmLinkState=%d\n", enmLinkState));
385
386	PRTREQ pReq = NULL;
387
388	/* don't queue new requests when the NAT thread is about to stop */
389	if (pThis->pSlirpThread->enmState != PDMTHREADSTATE_RUNNING)
390	return;
391
392	int rc = RTReqAlloc(pThis->pSlirpReqQueue, &pReq, RTREQTYPE_INTERNAL);
393	AssertReleaseRC(rc);
394	pReq->u.Internal.pfn = (PFNRT)drvNATNotifyLinkChangedWorker;
395	pReq->u.Internal.cArgs = 2;
396	pReq->u.Internal.aArgs[0] = (uintptr_t)pThis;
397	pReq->u.Internal.aArgs[1] = (uintptr_t)enmLinkState;
398	pReq->fFlags = RTREQFLAGS_VOID;
399	rc = RTReqQueue(pReq, 0); /* don't wait, we have to wakeup the NAT thread fist */
400	if (RT_LIKELY(rc == VERR_TIMEOUT))
401	{
402	drvNATNotifyNATThread(pThis);
403	rc = RTReqWait(pReq, RT_INDEFINITE_WAIT);
404	AssertReleaseRC(rc);
405	}
406	else
407	AssertReleaseRC(rc);
408	RTReqFree(pReq);
409	}
410
411	/**
412	* NAT thread handling the slirp stuff. The slirp implementation is single-threaded
413	* so we execute this enginre in a dedicated thread. We take care that this thread
414	* does not become the bottleneck: If the guest wants to send, a request is enqueued
415	* into the pSlirpReqQueue and handled asynchronously by this thread. If this thread
416	* wants to deliver packets to the guest, it enqueues a request into pRecvReqQueue
417	* which is later handled by the Recv thread.
418	*/
419	static DECLCALLBACK(int) drvNATAsyncIoThread(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
420	{
421	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
422	int nFDs = -1;
423	unsigned int ms;
424	#ifdef RT_OS_WINDOWS
425	DWORD event;
426	HANDLE *phEvents;
427	unsigned int cBreak = 0;
428	#else /* RT_OS_WINDOWS */
429	struct pollfd *polls = NULL;
430	unsigned int cPollNegRet = 0;
431	#endif /* !RT_OS_WINDOWS */
432
433	LogFlow(("drvNATAsyncIoThread: pThis=%p\n", pThis));
434
435	if (pThread->enmState == PDMTHREADSTATE_INITIALIZING)
436	return VINF_SUCCESS;
437
438	#ifdef RT_OS_WINDOWS
439	phEvents = slirp_get_events(pThis->pNATState);
440	#endif /* RT_OS_WINDOWS */
441
442	/*
443	* Polling loop.
444	*/
445	while (pThread->enmState == PDMTHREADSTATE_RUNNING)
446	{
447	nFDs = -1;
448	/*
449	* To prevent concurent execution of sending/receving threads
450	*/
451	#ifndef RT_OS_WINDOWS
452	nFDs = slirp_get_nsock(pThis->pNATState);
453	polls = NULL;
454	/* allocation for all sockets + Management pipe */
455	polls = (struct pollfd )RTMemAlloc((1 + nFDs) sizeof(struct pollfd) + sizeof(uint32_t));
456	if (polls == NULL)
457	return VERR_NO_MEMORY;
458
459	/* don't pass the managemant pipe */
460	slirp_select_fill(pThis->pNATState, &nFDs, &polls[1]);
461	ms = slirp_get_timeout_ms(pThis->pNATState);
462
463	polls[0].fd = pThis->PipeRead;
464	/* POLLRDBAND usually doesn't used on Linux but seems used on Solaris */
465	polls[0].events = POLLRDNORM\|POLLPRI\|POLLRDBAND;
466	polls[0].revents = 0;
467
468	int cChangedFDs = poll(polls, nFDs + 1, ms ? ms : -1);
469	if (cChangedFDs < 0)
470	{
471	if (errno == EINTR)
472	{
473	Log2(("NAT: signal was caught while sleep on poll\n"));
474	/* No error, just process all outstanding requests but don't wait */
475	cChangedFDs = 0;
476	}
477	else if (cPollNegRet++ > 128)
478	{
479	LogRel(("NAT:Poll returns (%s) suppressed %d\n", strerror(errno), cPollNegRet));
480	cPollNegRet = 0;
481	}
482	}
483
484	if (cChangedFDs >= 0)
485	{
486	slirp_select_poll(pThis->pNATState, &polls[1], nFDs);
487	if (polls[0].revents & (POLLRDNORM\|POLLPRI\|POLLRDBAND))
488	{
489	/* drain the pipe */
490	char ch[1];
491	size_t cbRead;
492	int counter = 0;
493	/*
494	* drvNATSend decoupled so we don't know how many times
495	* device's thread sends before we've entered multiplex,
496	* so to avoid false alarm drain pipe here to the very end
497	*
498	* @todo: Probably we should counter drvNATSend to count how
499	* deep pipe has been filed before drain.
500	*
501	* XXX:Make it reading exactly we need to drain the pipe.
502	*/
503	RTFileRead(pThis->PipeRead, &ch, 1, &cbRead);
504	}
505	}
506	/* process _all_ outstanding requests but don't wait */
507	RTReqProcess(pThis->pSlirpReqQueue, 0);
508	RTMemFree(polls);
509	#else /* RT_OS_WINDOWS */
510	slirp_select_fill(pThis->pNATState, &nFDs);
511	ms = slirp_get_timeout_ms(pThis->pNATState);
512	struct timeval tv = { 0, ms*1000 };
513	event = WSAWaitForMultipleEvents(nFDs, phEvents, FALSE, ms ? ms : WSA_INFINITE, FALSE);
514	if ( (event < WSA_WAIT_EVENT_0 \|\| event > WSA_WAIT_EVENT_0 + nFDs - 1)
515	&& event != WSA_WAIT_TIMEOUT)
516	{
517	int error = WSAGetLastError();
518	LogRel(("NAT: WSAWaitForMultipleEvents returned %d (error %d)\n", event, error));
519	RTAssertReleasePanic();
520	}
521
522	if (event == WSA_WAIT_TIMEOUT)
523	{
524	/* only check for slow/fast timers */
525	slirp_select_poll(pThis->pNATState, /* fTimeout=/true, /fIcmp=*/false);
526	continue;
527	}
528	/* poll the sockets in any case */
529	Log2(("%s: poll\n", __FUNCTION__));
530	slirp_select_poll(pThis->pNATState, /* fTimeout=/false, / fIcmp=*/(event == WSA_WAIT_EVENT_0));
531	/* process _all_ outstanding requests but don't wait */
532	RTReqProcess(pThis->pSlirpReqQueue, 0);
533	# ifdef VBOX_NAT_DELAY_HACK
534	if (cBreak++ > 128)
535	{
536	cBreak = 0;
537	RTThreadSleep(2);
538	}
539	# endif
540	#endif /* RT_OS_WINDOWS */
541	}
542
543	return VINF_SUCCESS;
544	}
545
546
547	/**
548	* Unblock the send thread so it can respond to a state change.
549	*
550	* @returns VBox status code.
551	* @param pDevIns The pcnet device instance.
552	* @param pThread The send thread.
553	*/
554	static DECLCALLBACK(int) drvNATAsyncIoWakeup(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
555	{
556	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
557
558	drvNATNotifyNATThread(pThis);
559	return VINF_SUCCESS;
560	}
561
562	#ifdef VBOX_WITH_SLIRP_MT
563
564	static DECLCALLBACK(int) drvNATAsyncIoGuest(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
565	{
566	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
567
568	if (pThread->enmState == PDMTHREADSTATE_INITIALIZING)
569	return VINF_SUCCESS;
570
571	while (pThread->enmState == PDMTHREADSTATE_RUNNING)
572	slirp_process_queue(pThis->pNATState);
573
574	return VINF_SUCCESS;
575	}
576
577
578	static DECLCALLBACK(int) drvNATAsyncIoGuestWakeup(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
579	{
580	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
581
582	return VINF_SUCCESS;
583	}
584
585	#endif /* VBOX_WITH_SLIRP_MT */
586
587
588	/**
589	* Function called by slirp to check if it's possible to feed incoming data to the network port.
590	* @returns 1 if possible.
591	* @returns 0 if not possible.
592	*/
593	int slirp_can_output(void *pvUser)
594	{
595	return 1;
596	}
597
598	/**
599	* Function called by slirp to feed incoming data to the network port.
600	*/
601	void slirp_output(void pvUser, void pvArg, const uint8_t *pu8Buf, int cb)
602	{
603	PDRVNAT pThis = (PDRVNAT)pvUser;
604	Assert(pThis);
605
606	LogFlow(("slirp_output BEGIN %x %d\n", pu8Buf, cb));
607	Log2(("slirp_output: pu8Buf=%p cb=%#x (pThis=%p)\n%.*Rhxd\n", pu8Buf, cb, pThis, cb, pu8Buf));
608
609	PRTREQ pReq = NULL;
610
611	/* don't queue new requests when the NAT thread is about to stop */
612	if (pThis->pSlirpThread->enmState != PDMTHREADSTATE_RUNNING)
613	return;
614
615	int rc = RTReqAlloc(pThis->pRecvReqQueue, &pReq, RTREQTYPE_INTERNAL);
616	AssertReleaseRC(rc);
617	pReq->u.Internal.pfn = (PFNRT)drvNATRecvWorker;
618	pReq->u.Internal.cArgs = 3;
619	pReq->u.Internal.aArgs[0] = (uintptr_t)pThis;
620	pReq->u.Internal.aArgs[1] = (uintptr_t)pu8Buf;
621	pReq->u.Internal.aArgs[2] = (uintptr_t)cb;
622	pReq->fFlags = RTREQFLAGS_VOID\|RTREQFLAGS_NO_WAIT;
623	rc = RTReqQueue(pReq, 0);
624	AssertReleaseRC(rc);
625	drvNATRecvWakeup(pThis->pDrvIns, pThis->pRecvThread);
626	STAM_COUNTER_INC(&pThis->StatQueuePktSent);
627	}
628
629
630	/**
631	* Queries an interface to the driver.
632	*
633	* @returns Pointer to interface.
634	* @returns NULL if the interface was not supported by the driver.
635	* @param pInterface Pointer to this interface structure.
636	* @param enmInterface The requested interface identification.
637	* @thread Any thread.
638	*/
639	static DECLCALLBACK(void *) drvNATQueryInterface(PPDMIBASE pInterface, PDMINTERFACE enmInterface)
640	{
641	PPDMDRVINS pDrvIns = PDMIBASE_2_PDMDRV(pInterface);
642	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
643	switch (enmInterface)
644	{
645	case PDMINTERFACE_BASE:
646	return &pDrvIns->IBase;
647	case PDMINTERFACE_NETWORK_CONNECTOR:
648	return &pThis->INetworkConnector;
649	default:
650	return NULL;
651	}
652	}
653
654
655	/**
656	* Get the MAC address into the slirp stack.
657	*
658	* Called by drvNATLoadDone and drvNATPowerOn.
659	*/
660	static void drvNATSetMac(PDRVNAT pThis)
661	{
662	if (pThis->pConfig)
663	{
664	RTMAC Mac;
665	pThis->pConfig->pfnGetMac(pThis->pConfig, &Mac);
666	slirp_set_ethaddr(pThis->pNATState, Mac.au8);
667	}
668	}
669
670
671	/**
672	* After loading we have to pass the MAC address of the ethernet device to the slirp stack.
673	* Otherwise the guest is not reachable until it performs a DHCP request or an ARP request
674	* (usually done during guest boot).
675	*/
676	static DECLCALLBACK(int) drvNATLoadDone(PPDMDRVINS pDrvIns, PSSMHANDLE pSSMHandle)
677	{
678	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
679	drvNATSetMac(pThis);
680	return VINF_SUCCESS;
681	}
682
683
684	/**
685	* Some guests might not use DHCP to retrieve an IP but use a static IP.
686	*/
687	static DECLCALLBACK(void) drvNATPowerOn(PPDMDRVINS pDrvIns)
688	{
689	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
690	drvNATSetMac(pThis);
691	}
692
693
694	/**
695	* Sets up the redirectors.
696	*
697	* @returns VBox status code.
698	* @param pCfgHandle The drivers configuration handle.
699	*/
700	static int drvNATConstructRedir(unsigned iInstance, PDRVNAT pThis, PCFGMNODE pCfgHandle, RTIPV4ADDR Network)
701	{
702	RTMAC Mac;
703	memset(&Mac, 0, sizeof(RTMAC)); /can't get MAC here /
704	/*
705	* Enumerate redirections.
706	*/
707	for (PCFGMNODE pNode = CFGMR3GetFirstChild(pCfgHandle); pNode; pNode = CFGMR3GetNextChild(pNode))
708	{
709	/*
710	* Validate the port forwarding config.
711	*/
712	if (!CFGMR3AreValuesValid(pNode, "Protocol\0UDP\0HostPort\0GuestPort\0GuestIP\0BindIP\0"))
713	return PDMDRV_SET_ERROR(pThis->pDrvIns, VERR_PDM_DRVINS_UNKNOWN_CFG_VALUES, N_("Unknown configuration in port forwarding"));
714
715	/* protocol type */
716	bool fUDP;
717	char szProtocol[32];
718	int rc;
719	GET_STRING(rc, pThis, pNode, "Protocol", szProtocol[0], sizeof(szProtocol));
720	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
721	{
722	fUDP = false;
723	GET_BOOL(rc, pThis, pNode, "UDP", fUDP);
724	}
725	else if (RT_SUCCESS(rc))
726	{
727	if (!RTStrICmp(szProtocol, "TCP"))
728	fUDP = false;
729	else if (!RTStrICmp(szProtocol, "UDP"))
730	fUDP = true;
731	else
732	return PDMDrvHlpVMSetError(pThis->pDrvIns, VERR_INVALID_PARAMETER, RT_SRC_POS,
733	N_("NAT#%d: Invalid configuration value for \"Protocol\": \"%s\""),
734	iInstance, szProtocol);
735	}
736	/* host port */
737	int32_t iHostPort;
738	GET_S32_STRICT(rc, pThis, pNode, "HostPort", iHostPort);
739
740	/* guest port */
741	int32_t iGuestPort;
742	GET_S32_STRICT(rc, pThis, pNode, "GuestPort", iGuestPort);
743
744	/* guest address */
745	struct in_addr GuestIP;
746	/* @todo (vvl) use CTL_* */
747	GETIP_DEF(rc, pThis, pNode, GuestIP, htonl(Network \| CTL_GUEST));
748
749	/*
750	* Call slirp about it.
751	*/
752	struct in_addr BindIP;
753	GETIP_DEF(rc, pThis, pNode, BindIP, INADDR_ANY);
754	if (slirp_redir(pThis->pNATState, fUDP, BindIP, iHostPort, GuestIP, iGuestPort, Mac.au8) < 0)
755	return PDMDrvHlpVMSetError(pThis->pDrvIns, VERR_NAT_REDIR_SETUP, RT_SRC_POS,
756	N_("NAT#%d: configuration error: failed to set up "
757	"redirection of %d to %d. Probably a conflict with "
758	"existing services or other rules"), iInstance, iHostPort,
759	iGuestPort);
760	} /* for each redir rule */
761
762	return VINF_SUCCESS;
763	}
764
765
766	/**
767	* Destruct a driver instance.
768	*
769	* Most VM resources are freed by the VM. This callback is provided so that any non-VM
770	* resources can be freed correctly.
771	*
772	* @param pDrvIns The driver instance data.
773	*/
774	static DECLCALLBACK(void) drvNATDestruct(PPDMDRVINS pDrvIns)
775	{
776	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
777
778	LogFlow(("drvNATDestruct:\n"));
779
780	slirp_term(pThis->pNATState);
781	slirp_deregister_statistics(pThis->pNATState, pDrvIns);
782	pThis->pNATState = NULL;
783	#ifdef VBOX_WITH_STATISTICS
784	# define DRV_PROFILE_COUNTER(name, dsc) DEREGISTER_COUNTER(name, pThis)
785	# define DRV_COUNTING_COUNTER(name, dsc) DEREGISTER_COUNTER(name, pThis)
786	# include "counters.h"
787	#endif
788	}
789
790
791	/**
792	* Construct a NAT network transport driver instance.
793	*
794	* @copydoc FNPDMDRVCONSTRUCT
795	*/
796	static DECLCALLBACK(int) drvNATConstruct(PPDMDRVINS pDrvIns, PCFGMNODE pCfgHandle, uint32_t fFlags)
797	{
798	PDRVNAT pThis = PDMINS_2_DATA(pDrvIns, PDRVNAT);
799
800	LogFlow(("drvNATConstruct:\n"));
801
802	/*
803	* Validate the config.
804	*/
805	if (!CFGMR3AreValuesValid(pCfgHandle,
806	"PassDomain\0TFTPPrefix\0BootFile\0Network"
807	"\0NextServer\0DNSProxy\0BindIP\0UseHostResolver\0"
808	#ifdef VBOX_WITH_SLIRP_BSD_MBUF
809	"SlirpMTU\0"
810	#endif
811	"SocketRcvBuf\0SocketSndBuf\0TcpRcvSpace\0TcpSndSpace\0"))
812	return PDMDRV_SET_ERROR(pDrvIns, VERR_PDM_DRVINS_UNKNOWN_CFG_VALUES,
813	N_("Unknown NAT configuration option, only supports PassDomain,"
814	" TFTPPrefix, BootFile and Network"));
815
816	/*
817	* Init the static parts.
818	*/
819	pThis->pDrvIns = pDrvIns;
820	pThis->pNATState = NULL;
821	pThis->pszTFTPPrefix = NULL;
822	pThis->pszBootFile = NULL;
823	pThis->pszNextServer = NULL;
824	/* IBase */
825	pDrvIns->IBase.pfnQueryInterface = drvNATQueryInterface;
826	/* INetwork */
827	pThis->INetworkConnector.pfnSend = drvNATSend;
828	pThis->INetworkConnector.pfnSetPromiscuousMode = drvNATSetPromiscuousMode;
829	pThis->INetworkConnector.pfnNotifyLinkChanged = drvNATNotifyLinkChanged;
830
831	/*
832	* Get the configuration settings.
833	*/
834	int rc;
835	bool fPassDomain = true;
836	GET_BOOL(rc, pThis, pCfgHandle, "PassDomain", fPassDomain);
837
838	GET_STRING_ALLOC(rc, pThis, pCfgHandle, "TFTPPrefix", pThis->pszTFTPPrefix);
839	GET_STRING_ALLOC(rc, pThis, pCfgHandle, "BootFile", pThis->pszBootFile);
840	GET_STRING_ALLOC(rc, pThis, pCfgHandle, "NextServer", pThis->pszNextServer);
841
842	int fDNSProxy = 0;
843	GET_S32(rc, pThis, pCfgHandle, "DNSProxy", fDNSProxy);
844	int fUseHostResolver = 0;
845	GET_S32(rc, pThis, pCfgHandle, "UseHostResolver", fUseHostResolver);
846	#ifdef VBOX_WITH_SLIRP_BSD_MBUF
847	int MTU = 1500;
848	GET_S32(rc, pThis, pCfgHandle, "SlirpMTU", MTU);
849	#endif
850
851	/*
852	* Query the network port interface.
853	*/
854	pThis->pPort =
855	(PPDMINETWORKPORT)pDrvIns->pUpBase->pfnQueryInterface(pDrvIns->pUpBase,
856	PDMINTERFACE_NETWORK_PORT);
857	if (!pThis->pPort)
858	return PDMDRV_SET_ERROR(pDrvIns, VERR_PDM_MISSING_INTERFACE_ABOVE,
859	N_("Configuration error: the above device/driver didn't "
860	"export the network port interface"));
861	pThis->pConfig =
862	(PPDMINETWORKCONFIG)pDrvIns->pUpBase->pfnQueryInterface(pDrvIns->pUpBase,
863	PDMINTERFACE_NETWORK_CONFIG);
864	if (!pThis->pConfig)
865	return PDMDRV_SET_ERROR(pDrvIns, VERR_PDM_MISSING_INTERFACE_ABOVE,
866	N_("Configuration error: the above device/driver didn't "
867	"export the network config interface"));
868
869	/* Generate a network address for this network card. */
870	char szNetwork[32]; /* xxx.xxx.xxx.xxx/yy */
871	GET_STRING(rc, pThis, pCfgHandle, "Network", szNetwork[0], sizeof(szNetwork));
872	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
873	RTStrPrintf(szNetwork, sizeof(szNetwork), "10.0.%d.0/24", pDrvIns->iInstance + 2);
874
875	RTIPV4ADDR Network;
876	RTIPV4ADDR Netmask;
877	rc = RTCidrStrToIPv4(szNetwork, &Network, &Netmask);
878	if (RT_FAILURE(rc))
879	return PDMDrvHlpVMSetError(pDrvIns, rc, RT_SRC_POS, N_("NAT#%d: Configuration error: "
880	"network '%s' describes not a valid IPv4 network"),
881	pDrvIns->iInstance, szNetwork);
882
883	char szNetAddr[16];
884	RTStrPrintf(szNetAddr, sizeof(szNetAddr), "%d.%d.%d.%d",
885	(Network & 0xFF000000) >> 24, (Network & 0xFF0000) >> 16,
886	(Network & 0xFF00) >> 8, Network & 0xFF);
887
888	/*
889	* Initialize slirp.
890	*/
891	rc = slirp_init(&pThis->pNATState, &szNetAddr[0], Netmask, fPassDomain, !!fUseHostResolver, pThis);
892	if (RT_SUCCESS(rc))
893	{
894	slirp_set_dhcp_TFTP_prefix(pThis->pNATState, pThis->pszTFTPPrefix);
895	slirp_set_dhcp_TFTP_bootfile(pThis->pNATState, pThis->pszBootFile);
896	slirp_set_dhcp_next_server(pThis->pNATState, pThis->pszNextServer);
897	slirp_set_dhcp_dns_proxy(pThis->pNATState, !!fDNSProxy);
898	#ifdef VBOX_WITH_SLIRP_BSD_MBUF
899	slirp_set_mtu(pThis->pNATState, MTU);
900	#endif
901	char *pszBindIP = NULL;
902	GET_STRING_ALLOC(rc, pThis, pCfgHandle, "BindIP", pszBindIP);
903	rc = slirp_set_binding_address(pThis->pNATState, pszBindIP);
904	if (rc != 0)
905	LogRel(("NAT: value of BindIP has been ignored\n"));
906
907	if(pszBindIP != NULL)
908	MMR3HeapFree(pszBindIP);
909	#define SLIRP_SET_TUNING_VALUE(name, setter) \
910	do \
911	{ \
912	int len = 0; \
913	rc = CFGMR3QueryS32(pCfgHandle, name, &len); \
914	if (RT_SUCCESS(rc)) \
915	setter(pThis->pNATState, len); \
916	} while(0)
917
918	SLIRP_SET_TUNING_VALUE("SocketRcvBuf", slirp_set_rcvbuf);
919	SLIRP_SET_TUNING_VALUE("SocketSndBuf", slirp_set_sndbuf);
920	SLIRP_SET_TUNING_VALUE("TcpRcvSpace", slirp_set_tcp_rcvspace);
921	SLIRP_SET_TUNING_VALUE("TcpSndSpace", slirp_set_tcp_sndspace);
922
923	slirp_register_statistics(pThis->pNATState, pDrvIns);
924	#ifdef VBOX_WITH_STATISTICS
925	# define DRV_PROFILE_COUNTER(name, dsc) REGISTER_COUNTER(name, pThis, STAMTYPE_PROFILE, STAMUNIT_TICKS_PER_CALL, dsc)
926	# define DRV_COUNTING_COUNTER(name, dsc) REGISTER_COUNTER(name, pThis, STAMTYPE_COUNTER, STAMUNIT_COUNT, dsc)
927	# include "counters.h"
928	#endif
929
930	int rc2 = drvNATConstructRedir(pDrvIns->iInstance, pThis, pCfgHandle, Network);
931	if (RT_SUCCESS(rc2))
932	{
933	/*
934	* Register a load done notification to get the MAC address into the slirp
935	* engine after we loaded a guest state.
936	*/
937	rc2 = PDMDrvHlpSSMRegisterLoadDone(pDrvIns, drvNATLoadDone);
938	AssertRC(rc2);
939	rc = RTReqCreateQueue(&pThis->pSlirpReqQueue);
940	if (RT_FAILURE(rc))
941	{
942	LogRel(("NAT: Can't create request queue\n"));
943	return rc;
944	}
945
946
947	rc = RTReqCreateQueue(&pThis->pRecvReqQueue);
948	if (RT_FAILURE(rc))
949	{
950	LogRel(("NAT: Can't create request queue\n"));
951	return rc;
952	}
953	rc = PDMDrvHlpPDMThreadCreate(pDrvIns, &pThis->pRecvThread, pThis, drvNATRecv,
954	drvNATRecvWakeup, 128 * _1K, RTTHREADTYPE_IO, "NATRX");
955	AssertReleaseRC(rc);
956	rc = RTSemEventCreate(&pThis->EventRecv);
957
958	#ifndef RT_OS_WINDOWS
959	/*
960	* Create the control pipe.
961	*/
962	int fds[2];
963	if (pipe(&fds[0]) != 0) /** @todo RTPipeCreate() or something... */
964	{
965	int rc = RTErrConvertFromErrno(errno);
966	AssertRC(rc);
967	return rc;
968	}
969	pThis->PipeRead = fds[0];
970	pThis->PipeWrite = fds[1];
971	#else
972	pThis->hWakeupEvent = CreateEvent(NULL, FALSE, FALSE, NULL); /* auto-reset event */
973	slirp_register_external_event(pThis->pNATState, pThis->hWakeupEvent,
974	VBOX_WAKEUP_EVENT_INDEX);
975	#endif
976
977	rc = PDMDrvHlpPDMThreadCreate(pDrvIns, &pThis->pSlirpThread, pThis, drvNATAsyncIoThread,
978	drvNATAsyncIoWakeup, 128 * _1K, RTTHREADTYPE_IO, "NAT");
979	AssertReleaseRC(rc);
980
981	#ifdef VBOX_WITH_SLIRP_MT
982	rc = PDMDrvHlpPDMThreadCreate(pDrvIns, &pThis->pGuestThread, pThis, drvNATAsyncIoGuest,
983	drvNATAsyncIoGuestWakeup, 128 * _1K, RTTHREADTYPE_IO, "NATGUEST");
984	AssertReleaseRC(rc);
985	#endif
986
987	pThis->enmLinkState = PDMNETWORKLINKSTATE_UP;
988
989	/* might return VINF_NAT_DNS */
990	return rc;
991	}
992	/* failure path */
993	rc = rc2;
994	slirp_term(pThis->pNATState);
995	pThis->pNATState = NULL;
996	}
997	else
998	{
999	PDMDRV_SET_ERROR(pDrvIns, rc, N_("Unknown error during NAT networking setup: "));
1000	AssertMsgFailed(("Add error message for rc=%d (%Rrc)\n", rc, rc));
1001	}
1002
1003	return rc;
1004	}
1005
1006
1007	/**
1008	* NAT network transport driver registration record.
1009	*/
1010	const PDMDRVREG g_DrvNAT =
1011	{
1012	/* u32Version */
1013	PDM_DRVREG_VERSION,
1014	/* szDriverName */
1015	"NAT",
1016	/* pszDescription */
1017	"NAT Network Transport Driver",
1018	/* fFlags */
1019	PDM_DRVREG_FLAGS_HOST_BITS_DEFAULT,
1020	/* fClass. */
1021	PDM_DRVREG_CLASS_NETWORK,
1022	/* cMaxInstances */
1023	16,
1024	/* cbInstance */
1025	sizeof(DRVNAT),
1026	/* pfnConstruct */
1027	drvNATConstruct,
1028	/* pfnDestruct */
1029	drvNATDestruct,
1030	/* pfnIOCtl */
1031	NULL,
1032	/* pfnPowerOn */
1033	drvNATPowerOn,
1034	/* pfnReset */
1035	NULL,
1036	/* pfnSuspend */
1037	NULL,
1038	/* pfnResume */
1039	NULL,
1040	/* pfnAttach */
1041	NULL,
1042	/* pfnDetach */
1043	NULL,
1044	/* pfnPowerOff */
1045	NULL,
1046	/* pfnSoftReset */
1047	NULL,
1048	/* u32EndVersion */
1049	PDM_DRVREG_VERSION
1050	};
1051

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source: vbox/trunk/src/VBox/Devices/Network/DrvNAT.cpp@ 23253

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