VirtualBox

source: vbox/trunk/src/VBox/Devices/Network/DrvTAP.cpp@ 85561

Last change on this file since 85561 was 82968, checked in by vboxsync, 5 years ago

Copyright year updates by scm.
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1/* $Id: DrvTAP.cpp 82968 2020-02-04 10:35:17Z vboxsync $ */
2/** @file
3 * DrvTAP - Universal TAP network transport driver.
4 */
5
6/*
7 * Copyright (C) 2006-2020 Oracle Corporation
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
18
19/*********************************************************************************************************************************
20* Header Files *
21*********************************************************************************************************************************/
22#define LOG_GROUP LOG_GROUP_DRV_TUN
23#include <VBox/log.h>
24#include <VBox/vmm/pdmdrv.h>
25#include <VBox/vmm/pdmnetifs.h>
26#include <VBox/vmm/pdmnetinline.h>
27
28#include <iprt/asm.h>
29#include <iprt/assert.h>
30#include <iprt/ctype.h>
31#include <iprt/file.h>
32#include <iprt/mem.h>
33#include <iprt/path.h>
34#include <iprt/pipe.h>
35#include <iprt/semaphore.h>
36#include <iprt/string.h>
37#include <iprt/thread.h>
38#include <iprt/uuid.h>
39#ifdef RT_OS_SOLARIS
40# include <iprt/process.h>
41# include <iprt/env.h>
42#endif
43
44#include <sys/ioctl.h>
45#include <sys/poll.h>
46#ifdef RT_OS_SOLARIS
47# include <sys/stat.h>
48# include <sys/ethernet.h>
49# include <sys/sockio.h>
50# include <netinet/in.h>
51# include <netinet/in_systm.h>
52# include <netinet/ip.h>
53# include <netinet/ip_icmp.h>
54# include <netinet/udp.h>
55# include <netinet/tcp.h>
56# include <net/if.h>
57# include <stropts.h>
58# include <fcntl.h>
59# include <stdlib.h>
60# include <stdio.h>
61#else
62# include <sys/fcntl.h>
63#endif
64#include <errno.h>
65#include <unistd.h>
66
67#include "VBoxDD.h"
68
69
70/*********************************************************************************************************************************
71* Structures and Typedefs *
72*********************************************************************************************************************************/
73/**
74 * TAP driver instance data.
75 *
76 * @implements PDMINETWORKUP
77 */
78typedef struct DRVTAP
79{
80 /** The network interface. */
81 PDMINETWORKUP INetworkUp;
82 /** The network interface. */
83 PPDMINETWORKDOWN pIAboveNet;
84 /** Pointer to the driver instance. */
85 PPDMDRVINS pDrvIns;
86 /** TAP device file handle. */
87 RTFILE hFileDevice;
88 /** The configured TAP device name. */
89 char *pszDeviceName;
90#ifdef RT_OS_SOLARIS
91 /** IP device file handle (/dev/udp). */
92 int iIPFileDes;
93 /** Whether device name is obtained from setup application. */
94 bool fStatic;
95#endif
96 /** TAP setup application. */
97 char *pszSetupApplication;
98 /** TAP terminate application. */
99 char *pszTerminateApplication;
100 /** The write end of the control pipe. */
101 RTPIPE hPipeWrite;
102 /** The read end of the control pipe. */
103 RTPIPE hPipeRead;
104 /** Reader thread. */
105 PPDMTHREAD pThread;
106
107 /** @todo The transmit thread. */
108 /** Transmit lock used by drvTAPNetworkUp_BeginXmit. */
109 RTCRITSECT XmitLock;
110
111#ifdef VBOX_WITH_STATISTICS
112 /** Number of sent packets. */
113 STAMCOUNTER StatPktSent;
114 /** Number of sent bytes. */
115 STAMCOUNTER StatPktSentBytes;
116 /** Number of received packets. */
117 STAMCOUNTER StatPktRecv;
118 /** Number of received bytes. */
119 STAMCOUNTER StatPktRecvBytes;
120 /** Profiling packet transmit runs. */
121 STAMPROFILE StatTransmit;
122 /** Profiling packet receive runs. */
123 STAMPROFILEADV StatReceive;
124#endif /* VBOX_WITH_STATISTICS */
125
126#ifdef LOG_ENABLED
127 /** The nano ts of the last transfer. */
128 uint64_t u64LastTransferTS;
129 /** The nano ts of the last receive. */
130 uint64_t u64LastReceiveTS;
131#endif
132} DRVTAP, *PDRVTAP;
133
134
135/** Converts a pointer to TAP::INetworkUp to a PRDVTAP. */
136#define PDMINETWORKUP_2_DRVTAP(pInterface) ( (PDRVTAP)((uintptr_t)pInterface - RT_UOFFSETOF(DRVTAP, INetworkUp)) )
137
138
139/*********************************************************************************************************************************
140* Internal Functions *
141*********************************************************************************************************************************/
142#ifdef RT_OS_SOLARIS
143static int SolarisTAPAttach(PDRVTAP pThis);
144#endif
145
146
147
148/**
149 * @interface_method_impl{PDMINETWORKUP,pfnBeginXmit}
150 */
151static DECLCALLBACK(int) drvTAPNetworkUp_BeginXmit(PPDMINETWORKUP pInterface, bool fOnWorkerThread)
152{
153 RT_NOREF(fOnWorkerThread);
154 PDRVTAP pThis = PDMINETWORKUP_2_DRVTAP(pInterface);
155 int rc = RTCritSectTryEnter(&pThis->XmitLock);
156 if (RT_FAILURE(rc))
157 {
158 /** @todo XMIT thread */
159 rc = VERR_TRY_AGAIN;
160 }
161 return rc;
162}
163
164
165/**
166 * @interface_method_impl{PDMINETWORKUP,pfnAllocBuf}
167 */
168static DECLCALLBACK(int) drvTAPNetworkUp_AllocBuf(PPDMINETWORKUP pInterface, size_t cbMin,
169 PCPDMNETWORKGSO pGso, PPPDMSCATTERGATHER ppSgBuf)
170{
171 RT_NOREF(pInterface);
172#ifdef VBOX_STRICT
173 PDRVTAP pThis = PDMINETWORKUP_2_DRVTAP(pInterface);
174 Assert(RTCritSectIsOwner(&pThis->XmitLock));
175#endif
176
177 /*
178 * Allocate a scatter / gather buffer descriptor that is immediately
179 * followed by the buffer space of its single segment. The GSO context
180 * comes after that again.
181 */
182 PPDMSCATTERGATHER pSgBuf = (PPDMSCATTERGATHER)RTMemAlloc( RT_ALIGN_Z(sizeof(*pSgBuf), 16)
183 + RT_ALIGN_Z(cbMin, 16)
184 + (pGso ? RT_ALIGN_Z(sizeof(*pGso), 16) : 0));
185 if (!pSgBuf)
186 return VERR_NO_MEMORY;
187
188 /*
189 * Initialize the S/G buffer and return.
190 */
191 pSgBuf->fFlags = PDMSCATTERGATHER_FLAGS_MAGIC | PDMSCATTERGATHER_FLAGS_OWNER_1;
192 pSgBuf->cbUsed = 0;
193 pSgBuf->cbAvailable = RT_ALIGN_Z(cbMin, 16);
194 pSgBuf->pvAllocator = NULL;
195 if (!pGso)
196 pSgBuf->pvUser = NULL;
197 else
198 {
199 pSgBuf->pvUser = (uint8_t *)(pSgBuf + 1) + pSgBuf->cbAvailable;
200 *(PPDMNETWORKGSO)pSgBuf->pvUser = *pGso;
201 }
202 pSgBuf->cSegs = 1;
203 pSgBuf->aSegs[0].cbSeg = pSgBuf->cbAvailable;
204 pSgBuf->aSegs[0].pvSeg = pSgBuf + 1;
205
206#if 0 /* poison */
207 memset(pSgBuf->aSegs[0].pvSeg, 'F', pSgBuf->aSegs[0].cbSeg);
208#endif
209 *ppSgBuf = pSgBuf;
210 return VINF_SUCCESS;
211}
212
213
214/**
215 * @interface_method_impl{PDMINETWORKUP,pfnFreeBuf}
216 */
217static DECLCALLBACK(int) drvTAPNetworkUp_FreeBuf(PPDMINETWORKUP pInterface, PPDMSCATTERGATHER pSgBuf)
218{
219 RT_NOREF(pInterface);
220#ifdef VBOX_STRICT
221 PDRVTAP pThis = PDMINETWORKUP_2_DRVTAP(pInterface);
222 Assert(RTCritSectIsOwner(&pThis->XmitLock));
223#endif
224
225 if (pSgBuf)
226 {
227 Assert((pSgBuf->fFlags & PDMSCATTERGATHER_FLAGS_MAGIC_MASK) == PDMSCATTERGATHER_FLAGS_MAGIC);
228 pSgBuf->fFlags = 0;
229 RTMemFree(pSgBuf);
230 }
231 return VINF_SUCCESS;
232}
233
234
235/**
236 * @interface_method_impl{PDMINETWORKUP,pfnSendBuf}
237 */
238static DECLCALLBACK(int) drvTAPNetworkUp_SendBuf(PPDMINETWORKUP pInterface, PPDMSCATTERGATHER pSgBuf, bool fOnWorkerThread)
239{
240 RT_NOREF(fOnWorkerThread);
241 PDRVTAP pThis = PDMINETWORKUP_2_DRVTAP(pInterface);
242 STAM_COUNTER_INC(&pThis->StatPktSent);
243 STAM_COUNTER_ADD(&pThis->StatPktSentBytes, pSgBuf->cbUsed);
244 STAM_PROFILE_START(&pThis->StatTransmit, a);
245
246 AssertPtr(pSgBuf);
247 Assert((pSgBuf->fFlags & PDMSCATTERGATHER_FLAGS_MAGIC_MASK) == PDMSCATTERGATHER_FLAGS_MAGIC);
248 Assert(RTCritSectIsOwner(&pThis->XmitLock));
249
250 int rc;
251 if (!pSgBuf->pvUser)
252 {
253#ifdef LOG_ENABLED
254 uint64_t u64Now = RTTimeProgramNanoTS();
255 LogFlow(("drvTAPSend: %-4d bytes at %llu ns deltas: r=%llu t=%llu\n",
256 pSgBuf->cbUsed, u64Now, u64Now - pThis->u64LastReceiveTS, u64Now - pThis->u64LastTransferTS));
257 pThis->u64LastTransferTS = u64Now;
258#endif
259 Log2(("drvTAPSend: pSgBuf->aSegs[0].pvSeg=%p pSgBuf->cbUsed=%#x\n"
260 "%.*Rhxd\n",
261 pSgBuf->aSegs[0].pvSeg, pSgBuf->cbUsed, pSgBuf->cbUsed, pSgBuf->aSegs[0].pvSeg));
262
263 rc = RTFileWrite(pThis->hFileDevice, pSgBuf->aSegs[0].pvSeg, pSgBuf->cbUsed, NULL);
264 }
265 else
266 {
267 uint8_t abHdrScratch[256];
268 uint8_t const *pbFrame = (uint8_t const *)pSgBuf->aSegs[0].pvSeg;
269 PCPDMNETWORKGSO pGso = (PCPDMNETWORKGSO)pSgBuf->pvUser;
270 uint32_t const cSegs = PDMNetGsoCalcSegmentCount(pGso, pSgBuf->cbUsed); Assert(cSegs > 1);
271 rc = VINF_SUCCESS;
272 for (size_t iSeg = 0; iSeg < cSegs; iSeg++)
273 {
274 uint32_t cbSegFrame;
275 void *pvSegFrame = PDMNetGsoCarveSegmentQD(pGso, (uint8_t *)pbFrame, pSgBuf->cbUsed, abHdrScratch,
276 iSeg, cSegs, &cbSegFrame);
277 rc = RTFileWrite(pThis->hFileDevice, pvSegFrame, cbSegFrame, NULL);
278 if (RT_FAILURE(rc))
279 break;
280 }
281 }
282
283 pSgBuf->fFlags = 0;
284 RTMemFree(pSgBuf);
285
286 STAM_PROFILE_STOP(&pThis->StatTransmit, a);
287 AssertRC(rc);
288 if (RT_FAILURE(rc))
289 rc = rc == VERR_NO_MEMORY ? VERR_NET_NO_BUFFER_SPACE : VERR_NET_DOWN;
290 return rc;
291}
292
293
294/**
295 * @interface_method_impl{PDMINETWORKUP,pfnEndXmit}
296 */
297static DECLCALLBACK(void) drvTAPNetworkUp_EndXmit(PPDMINETWORKUP pInterface)
298{
299 PDRVTAP pThis = PDMINETWORKUP_2_DRVTAP(pInterface);
300 RTCritSectLeave(&pThis->XmitLock);
301}
302
303
304/**
305 * @interface_method_impl{PDMINETWORKUP,pfnSetPromiscuousMode}
306 */
307static DECLCALLBACK(void) drvTAPNetworkUp_SetPromiscuousMode(PPDMINETWORKUP pInterface, bool fPromiscuous)
308{
309 RT_NOREF(pInterface, fPromiscuous);
310 LogFlow(("drvTAPNetworkUp_SetPromiscuousMode: fPromiscuous=%d\n", fPromiscuous));
311 /* nothing to do */
312}
313
314
315/**
316 * Notification on link status changes.
317 *
318 * @param pInterface Pointer to the interface structure containing the called function pointer.
319 * @param enmLinkState The new link state.
320 * @thread EMT
321 */
322static DECLCALLBACK(void) drvTAPNetworkUp_NotifyLinkChanged(PPDMINETWORKUP pInterface, PDMNETWORKLINKSTATE enmLinkState)
323{
324 RT_NOREF(pInterface, enmLinkState);
325 LogFlow(("drvTAPNetworkUp_NotifyLinkChanged: enmLinkState=%d\n", enmLinkState));
326 /** @todo take action on link down and up. Stop the polling and such like. */
327}
328
329
330/**
331 * Asynchronous I/O thread for handling receive.
332 *
333 * @returns VINF_SUCCESS (ignored).
334 * @param Thread Thread handle.
335 * @param pvUser Pointer to a DRVTAP structure.
336 */
337static DECLCALLBACK(int) drvTAPAsyncIoThread(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
338{
339 PDRVTAP pThis = PDMINS_2_DATA(pDrvIns, PDRVTAP);
340 LogFlow(("drvTAPAsyncIoThread: pThis=%p\n", pThis));
341
342 if (pThread->enmState == PDMTHREADSTATE_INITIALIZING)
343 return VINF_SUCCESS;
344
345 STAM_PROFILE_ADV_START(&pThis->StatReceive, a);
346
347 /*
348 * Polling loop.
349 */
350 while (pThread->enmState == PDMTHREADSTATE_RUNNING)
351 {
352 /*
353 * Wait for something to become available.
354 */
355 struct pollfd aFDs[2];
356 aFDs[0].fd = RTFileToNative(pThis->hFileDevice);
357 aFDs[0].events = POLLIN | POLLPRI;
358 aFDs[0].revents = 0;
359 aFDs[1].fd = RTPipeToNative(pThis->hPipeRead);
360 aFDs[1].events = POLLIN | POLLPRI | POLLERR | POLLHUP;
361 aFDs[1].revents = 0;
362 STAM_PROFILE_ADV_STOP(&pThis->StatReceive, a);
363 errno=0;
364 int rc = poll(&aFDs[0], RT_ELEMENTS(aFDs), -1 /* infinite */);
365
366 /* this might have changed in the meantime */
367 if (pThread->enmState != PDMTHREADSTATE_RUNNING)
368 break;
369
370 STAM_PROFILE_ADV_START(&pThis->StatReceive, a);
371 if ( rc > 0
372 && (aFDs[0].revents & (POLLIN | POLLPRI))
373 && !aFDs[1].revents)
374 {
375 /*
376 * Read the frame.
377 */
378 char achBuf[16384];
379 size_t cbRead = 0;
380 /** @note At least on Linux we will never receive more than one network packet
381 * after poll() returned successfully. I don't know why but a second
382 * RTFileRead() operation will return with VERR_TRY_AGAIN in any case. */
383 rc = RTFileRead(pThis->hFileDevice, achBuf, sizeof(achBuf), &cbRead);
384 if (RT_SUCCESS(rc))
385 {
386 /*
387 * Wait for the device to have space for this frame.
388 * Most guests use frame-sized receive buffers, hence non-zero cbMax
389 * automatically means there is enough room for entire frame. Some
390 * guests (eg. Solaris) use large chains of small receive buffers
391 * (each 128 or so bytes large). We will still start receiving as soon
392 * as cbMax is non-zero because:
393 * - it would be quite expensive for pfnCanReceive to accurately
394 * determine free receive buffer space
395 * - if we were waiting for enough free buffers, there is a risk
396 * of deadlocking because the guest could be waiting for a receive
397 * overflow error to allocate more receive buffers
398 */
399 STAM_PROFILE_ADV_STOP(&pThis->StatReceive, a);
400 int rc1 = pThis->pIAboveNet->pfnWaitReceiveAvail(pThis->pIAboveNet, RT_INDEFINITE_WAIT);
401 STAM_PROFILE_ADV_START(&pThis->StatReceive, a);
402
403 /*
404 * A return code != VINF_SUCCESS means that we were woken up during a VM
405 * state transition. Drop the packet and wait for the next one.
406 */
407 if (RT_FAILURE(rc1))
408 continue;
409
410 /*
411 * Pass the data up.
412 */
413#ifdef LOG_ENABLED
414 uint64_t u64Now = RTTimeProgramNanoTS();
415 LogFlow(("drvTAPAsyncIoThread: %-4d bytes at %llu ns deltas: r=%llu t=%llu\n",
416 cbRead, u64Now, u64Now - pThis->u64LastReceiveTS, u64Now - pThis->u64LastTransferTS));
417 pThis->u64LastReceiveTS = u64Now;
418#endif
419 Log2(("drvTAPAsyncIoThread: cbRead=%#x\n" "%.*Rhxd\n", cbRead, cbRead, achBuf));
420 STAM_COUNTER_INC(&pThis->StatPktRecv);
421 STAM_COUNTER_ADD(&pThis->StatPktRecvBytes, cbRead);
422 rc1 = pThis->pIAboveNet->pfnReceive(pThis->pIAboveNet, achBuf, cbRead);
423 AssertRC(rc1);
424 }
425 else
426 {
427 LogFlow(("drvTAPAsyncIoThread: RTFileRead -> %Rrc\n", rc));
428 if (rc == VERR_INVALID_HANDLE)
429 break;
430 RTThreadYield();
431 }
432 }
433 else if ( rc > 0
434 && aFDs[1].revents)
435 {
436 LogFlow(("drvTAPAsyncIoThread: Control message: enmState=%d revents=%#x\n", pThread->enmState, aFDs[1].revents));
437 if (aFDs[1].revents & (POLLHUP | POLLERR | POLLNVAL))
438 break;
439
440 /* drain the pipe */
441 char ch;
442 size_t cbRead;
443 RTPipeRead(pThis->hPipeRead, &ch, 1, &cbRead);
444 }
445 else
446 {
447 /*
448 * poll() failed for some reason. Yield to avoid eating too much CPU.
449 *
450 * EINTR errors have been seen frequently. They should be harmless, even
451 * if they are not supposed to occur in our setup.
452 */
453 if (errno == EINTR)
454 Log(("rc=%d revents=%#x,%#x errno=%p %s\n", rc, aFDs[0].revents, aFDs[1].revents, errno, strerror(errno)));
455 else
456 AssertMsgFailed(("rc=%d revents=%#x,%#x errno=%p %s\n", rc, aFDs[0].revents, aFDs[1].revents, errno, strerror(errno)));
457 RTThreadYield();
458 }
459 }
460
461
462 LogFlow(("drvTAPAsyncIoThread: returns %Rrc\n", VINF_SUCCESS));
463 STAM_PROFILE_ADV_STOP(&pThis->StatReceive, a);
464 return VINF_SUCCESS;
465}
466
467
468/**
469 * Unblock the send thread so it can respond to a state change.
470 *
471 * @returns VBox status code.
472 * @param pDevIns The pcnet device instance.
473 * @param pThread The send thread.
474 */
475static DECLCALLBACK(int) drvTapAsyncIoWakeup(PPDMDRVINS pDrvIns, PPDMTHREAD pThread)
476{
477 RT_NOREF(pThread);
478 PDRVTAP pThis = PDMINS_2_DATA(pDrvIns, PDRVTAP);
479
480 size_t cbIgnored;
481 int rc = RTPipeWrite(pThis->hPipeWrite, "", 1, &cbIgnored);
482 AssertRC(rc);
483
484 return VINF_SUCCESS;
485}
486
487
488#if defined(RT_OS_SOLARIS)
489/**
490 * Calls OS-specific TAP setup application/script.
491 *
492 * @returns VBox error code.
493 * @param pThis The instance data.
494 */
495static int drvTAPSetupApplication(PDRVTAP pThis)
496{
497 char szCommand[4096];
498
499 RTStrPrintf(szCommand, sizeof(szCommand), "%s %s", pThis->pszSetupApplication,
500 pThis->fStatic ? pThis->pszDeviceName : "");
501
502 /* Pipe open the setup application. */
503 Log2(("Starting TAP setup application: %s\n", szCommand));
504 FILE* pfSetupHandle = popen(szCommand, "r");
505 if (pfSetupHandle == 0)
506 {
507 LogRel(("TAP#%d: Failed to run TAP setup application: %s\n", pThis->pDrvIns->iInstance,
508 pThis->pszSetupApplication, strerror(errno)));
509 return VERR_HOSTIF_INIT_FAILED;
510 }
511 if (!pThis->fStatic)
512 {
513 /* Obtain device name from setup application. */
514 char acBuffer[64];
515 size_t cBufSize;
516 fgets(acBuffer, sizeof(acBuffer), pfSetupHandle);
517 cBufSize = strlen(acBuffer);
518 /* The script must return the name of the interface followed by a carriage return as the
519 first line of its output. We need a null-terminated string. */
520 if ((cBufSize < 2) || (acBuffer[cBufSize - 1] != '\n'))
521 {
522 pclose(pfSetupHandle);
523 LogRel(("The TAP interface setup script did not return the name of a TAP device.\n"));
524 return VERR_HOSTIF_INIT_FAILED;
525 }
526 /* Overwrite the terminating newline character. */
527 acBuffer[cBufSize - 1] = 0;
528 RTStrAPrintf(&pThis->pszDeviceName, "%s", acBuffer);
529 }
530 int rc = pclose(pfSetupHandle);
531 if (!WIFEXITED(rc))
532 {
533 LogRel(("The TAP interface setup script terminated abnormally.\n"));
534 return VERR_HOSTIF_INIT_FAILED;
535 }
536 if (WEXITSTATUS(rc) != 0)
537 {
538 LogRel(("The TAP interface setup script returned a non-zero exit code.\n"));
539 return VERR_HOSTIF_INIT_FAILED;
540 }
541 return VINF_SUCCESS;
542}
543
544
545/**
546 * Calls OS-specific TAP terminate application/script.
547 *
548 * @returns VBox error code.
549 * @param pThis The instance data.
550 */
551static int drvTAPTerminateApplication(PDRVTAP pThis)
552{
553 char *pszArgs[3];
554 pszArgs[0] = pThis->pszTerminateApplication;
555 pszArgs[1] = pThis->pszDeviceName;
556 pszArgs[2] = NULL;
557
558 Log2(("Starting TAP terminate application: %s %s\n", pThis->pszTerminateApplication, pThis->pszDeviceName));
559 RTPROCESS pid = NIL_RTPROCESS;
560 int rc = RTProcCreate(pszArgs[0], pszArgs, RTENV_DEFAULT, 0, &pid);
561 if (RT_SUCCESS(rc))
562 {
563 RTPROCSTATUS Status;
564 rc = RTProcWait(pid, 0, &Status);
565 if (RT_SUCCESS(rc))
566 {
567 if ( Status.iStatus == 0
568 && Status.enmReason == RTPROCEXITREASON_NORMAL)
569 return VINF_SUCCESS;
570
571 LogRel(("TAP#%d: Error running TAP terminate application: %s\n", pThis->pDrvIns->iInstance, pThis->pszTerminateApplication));
572 }
573 else
574 LogRel(("TAP#%d: RTProcWait failed for: %s\n", pThis->pDrvIns->iInstance, pThis->pszTerminateApplication));
575 }
576 else
577 {
578 /* Bad. RTProcCreate() failed! */
579 LogRel(("TAP#%d: Failed to fork() process for running TAP terminate application: %s\n", pThis->pDrvIns->iInstance,
580 pThis->pszTerminateApplication, strerror(errno)));
581 }
582 return VERR_HOSTIF_TERM_FAILED;
583}
584
585#endif /* RT_OS_SOLARIS */
586
587
588#ifdef RT_OS_SOLARIS
589/** From net/if_tun.h, installed by Universal TUN/TAP driver */
590# define TUNNEWPPA (('T'<<16) | 0x0001)
591/** Whether to enable ARP for TAP. */
592# define VBOX_SOLARIS_TAP_ARP 1
593
594/**
595 * Creates/Attaches TAP device to IP.
596 *
597 * @returns VBox error code.
598 * @param pThis The instance data.
599 */
600static DECLCALLBACK(int) SolarisTAPAttach(PDRVTAP pThis)
601{
602 LogFlow(("SolarisTapAttach: pThis=%p\n", pThis));
603
604
605 int IPFileDes = open("/dev/udp", O_RDWR, 0);
606 if (IPFileDes < 0)
607 return PDMDrvHlpVMSetError(pThis->pDrvIns, VERR_PDM_HIF_OPEN_FAILED, RT_SRC_POS,
608 N_("Failed to open /dev/udp. errno=%d"), errno);
609
610 int TapFileDes = open("/dev/tap", O_RDWR, 0);
611 if (TapFileDes < 0)
612 return PDMDrvHlpVMSetError(pThis->pDrvIns, VERR_PDM_HIF_OPEN_FAILED, RT_SRC_POS,
613 N_("Failed to open /dev/tap for TAP. errno=%d"), errno);
614
615 /* Use the PPA from the ifname if possible (e.g "tap2", then use 2 as PPA) */
616 int iPPA = -1;
617 if (pThis->pszDeviceName)
618 {
619 size_t cch = strlen(pThis->pszDeviceName);
620 if (cch > 1 && RT_C_IS_DIGIT(pThis->pszDeviceName[cch - 1]) != 0)
621 iPPA = pThis->pszDeviceName[cch - 1] - '0';
622 }
623
624 struct strioctl ioIF;
625 ioIF.ic_cmd = TUNNEWPPA;
626 ioIF.ic_len = sizeof(iPPA);
627 ioIF.ic_dp = (char *)(&iPPA);
628 ioIF.ic_timout = 0;
629 iPPA = ioctl(TapFileDes, I_STR, &ioIF);
630 if (iPPA < 0)
631 {
632 close(TapFileDes);
633 return PDMDrvHlpVMSetError(pThis->pDrvIns, VERR_HOSTIF_IOCTL, RT_SRC_POS,
634 N_("Failed to get new interface. errno=%d"), errno);
635 }
636
637 int InterfaceFD = open("/dev/tap", O_RDWR, 0);
638 if (!InterfaceFD)
639 return PDMDrvHlpVMSetError(pThis->pDrvIns, VERR_PDM_HIF_OPEN_FAILED, RT_SRC_POS,
640 N_("Failed to open interface /dev/tap. errno=%d"), errno);
641
642 if (ioctl(InterfaceFD, I_PUSH, "ip") == -1)
643 {
644 close(InterfaceFD);
645 return PDMDrvHlpVMSetError(pThis->pDrvIns, VERR_HOSTIF_IOCTL, RT_SRC_POS,
646 N_("Failed to push IP. errno=%d"), errno);
647 }
648
649 struct lifreq ifReq;
650 memset(&ifReq, 0, sizeof(ifReq));
651 if (ioctl(InterfaceFD, SIOCGLIFFLAGS, &ifReq) == -1)
652 LogRel(("TAP#%d: Failed to get interface flags.\n", pThis->pDrvIns->iInstance));
653
654 ifReq.lifr_ppa = iPPA;
655 RTStrCopy(ifReq.lifr_name, sizeof(ifReq.lifr_name), pThis->pszDeviceName);
656
657 if (ioctl(InterfaceFD, SIOCSLIFNAME, &ifReq) == -1)
658 LogRel(("TAP#%d: Failed to set PPA. errno=%d\n", pThis->pDrvIns->iInstance, errno));
659
660 if (ioctl(InterfaceFD, SIOCGLIFFLAGS, &ifReq) == -1)
661 LogRel(("TAP#%d: Failed to get interface flags after setting PPA. errno=%d\n", pThis->pDrvIns->iInstance, errno));
662
663# ifdef VBOX_SOLARIS_TAP_ARP
664 /* Interface */
665 if (ioctl(InterfaceFD, I_PUSH, "arp") == -1)
666 LogRel(("TAP#%d: Failed to push ARP to Interface FD. errno=%d\n", pThis->pDrvIns->iInstance, errno));
667
668 /* IP */
669 if (ioctl(IPFileDes, I_POP, NULL) == -1)
670 LogRel(("TAP#%d: Failed I_POP from IP FD. errno=%d\n", pThis->pDrvIns->iInstance, errno));
671
672 if (ioctl(IPFileDes, I_PUSH, "arp") == -1)
673 LogRel(("TAP#%d: Failed to push ARP to IP FD. errno=%d\n", pThis->pDrvIns->iInstance, errno));
674
675 /* ARP */
676 int ARPFileDes = open("/dev/tap", O_RDWR, 0);
677 if (ARPFileDes < 0)
678 LogRel(("TAP#%d: Failed to open for /dev/tap for ARP. errno=%d", pThis->pDrvIns->iInstance, errno));
679
680 if (ioctl(ARPFileDes, I_PUSH, "arp") == -1)
681 LogRel(("TAP#%d: Failed to push ARP to ARP FD. errno=%d\n", pThis->pDrvIns->iInstance, errno));
682
683 ioIF.ic_cmd = SIOCSLIFNAME;
684 ioIF.ic_timout = 0;
685 ioIF.ic_len = sizeof(ifReq);
686 ioIF.ic_dp = (char *)&ifReq;
687 if (ioctl(ARPFileDes, I_STR, &ioIF) == -1)
688 LogRel(("TAP#%d: Failed to set interface name to ARP.\n", pThis->pDrvIns->iInstance));
689# endif
690
691 /* We must use I_LINK and not I_PLINK as I_PLINK makes the link persistent.
692 * Then we would not be able unlink the interface if we reuse it.
693 * Even 'unplumb' won't work after that.
694 */
695 int IPMuxID = ioctl(IPFileDes, I_LINK, InterfaceFD);
696 if (IPMuxID == -1)
697 {
698 close(InterfaceFD);
699# ifdef VBOX_SOLARIS_TAP_ARP
700 close(ARPFileDes);
701# endif
702 LogRel(("TAP#%d: Cannot link TAP device to IP.\n", pThis->pDrvIns->iInstance));
703 return PDMDrvHlpVMSetError(pThis->pDrvIns, VERR_HOSTIF_IOCTL, RT_SRC_POS,
704 N_("Failed to link TAP device to IP. Check TAP interface name. errno=%d"), errno);
705 }
706
707# ifdef VBOX_SOLARIS_TAP_ARP
708 int ARPMuxID = ioctl(IPFileDes, I_LINK, ARPFileDes);
709 if (ARPMuxID == -1)
710 LogRel(("TAP#%d: Failed to link TAP device to ARP\n", pThis->pDrvIns->iInstance));
711
712 close(ARPFileDes);
713# endif
714 close(InterfaceFD);
715
716 /* Reuse ifReq */
717 memset(&ifReq, 0, sizeof(ifReq));
718 RTStrCopy(ifReq.lifr_name, sizeof(ifReq.lifr_name), pThis->pszDeviceName);
719 ifReq.lifr_ip_muxid = IPMuxID;
720# ifdef VBOX_SOLARIS_TAP_ARP
721 ifReq.lifr_arp_muxid = ARPMuxID;
722# endif
723
724 if (ioctl(IPFileDes, SIOCSLIFMUXID, &ifReq) == -1)
725 {
726# ifdef VBOX_SOLARIS_TAP_ARP
727 ioctl(IPFileDes, I_PUNLINK, ARPMuxID);
728# endif
729 ioctl(IPFileDes, I_PUNLINK, IPMuxID);
730 close(IPFileDes);
731 LogRel(("TAP#%d: Failed to set Mux ID.\n", pThis->pDrvIns->iInstance));
732 return PDMDrvHlpVMSetError(pThis->pDrvIns, VERR_HOSTIF_IOCTL, RT_SRC_POS,
733 N_("Failed to set Mux ID. Check TAP interface name. errno=%d"), errno);
734 }
735
736 int rc = RTFileFromNative(&pThis->hFileDevice, TapFileDes);
737 AssertLogRelRC(rc);
738 if (RT_FAILURE(rc))
739 {
740 close(IPFileDes);
741 close(TapFileDes);
742 }
743 pThis->iIPFileDes = IPFileDes;
744
745 return VINF_SUCCESS;
746}
747
748#endif /* RT_OS_SOLARIS */
749
750/* -=-=-=-=- PDMIBASE -=-=-=-=- */
751
752/**
753 * @interface_method_impl{PDMIBASE,pfnQueryInterface}
754 */
755static DECLCALLBACK(void *) drvTAPQueryInterface(PPDMIBASE pInterface, const char *pszIID)
756{
757 PPDMDRVINS pDrvIns = PDMIBASE_2_PDMDRV(pInterface);
758 PDRVTAP pThis = PDMINS_2_DATA(pDrvIns, PDRVTAP);
759
760 PDMIBASE_RETURN_INTERFACE(pszIID, PDMIBASE, &pDrvIns->IBase);
761 PDMIBASE_RETURN_INTERFACE(pszIID, PDMINETWORKUP, &pThis->INetworkUp);
762 return NULL;
763}
764
765/* -=-=-=-=- PDMDRVREG -=-=-=-=- */
766
767/**
768 * Destruct a driver instance.
769 *
770 * Most VM resources are freed by the VM. This callback is provided so that any non-VM
771 * resources can be freed correctly.
772 *
773 * @param pDrvIns The driver instance data.
774 */
775static DECLCALLBACK(void) drvTAPDestruct(PPDMDRVINS pDrvIns)
776{
777 LogFlow(("drvTAPDestruct\n"));
778 PDRVTAP pThis = PDMINS_2_DATA(pDrvIns, PDRVTAP);
779 PDMDRV_CHECK_VERSIONS_RETURN_VOID(pDrvIns);
780
781 /*
782 * Terminate the control pipe.
783 */
784 int rc;
785 if (pThis->hPipeWrite != NIL_RTPIPE)
786 {
787 rc = RTPipeClose(pThis->hPipeWrite); AssertRC(rc);
788 pThis->hPipeWrite = NIL_RTPIPE;
789 }
790 if (pThis->hPipeRead != NIL_RTPIPE)
791 {
792 rc = RTPipeClose(pThis->hPipeRead); AssertRC(rc);
793 pThis->hPipeRead = NIL_RTPIPE;
794 }
795
796#ifdef RT_OS_SOLARIS
797 /** @todo r=bird: This *does* need checking against ConsoleImpl2.cpp if used on non-solaris systems. */
798 if (pThis->hFileDevice != NIL_RTFILE)
799 {
800 int rc = RTFileClose(pThis->hFileDevice); AssertRC(rc);
801 pThis->hFileDevice = NIL_RTFILE;
802 }
803
804 /*
805 * Call TerminateApplication after closing the device otherwise
806 * TerminateApplication would not be able to unplumb it.
807 */
808 if (pThis->pszTerminateApplication)
809 drvTAPTerminateApplication(pThis);
810
811#endif /* RT_OS_SOLARIS */
812
813#ifdef RT_OS_SOLARIS
814 if (!pThis->fStatic)
815 RTStrFree(pThis->pszDeviceName); /* allocated by drvTAPSetupApplication */
816 else
817 MMR3HeapFree(pThis->pszDeviceName);
818#else
819 MMR3HeapFree(pThis->pszDeviceName);
820#endif
821 pThis->pszDeviceName = NULL;
822 MMR3HeapFree(pThis->pszSetupApplication);
823 pThis->pszSetupApplication = NULL;
824 MMR3HeapFree(pThis->pszTerminateApplication);
825 pThis->pszTerminateApplication = NULL;
826
827 /*
828 * Kill the xmit lock.
829 */
830 if (RTCritSectIsInitialized(&pThis->XmitLock))
831 RTCritSectDelete(&pThis->XmitLock);
832
833#ifdef VBOX_WITH_STATISTICS
834 /*
835 * Deregister statistics.
836 */
837 PDMDrvHlpSTAMDeregister(pDrvIns, &pThis->StatPktSent);
838 PDMDrvHlpSTAMDeregister(pDrvIns, &pThis->StatPktSentBytes);
839 PDMDrvHlpSTAMDeregister(pDrvIns, &pThis->StatPktRecv);
840 PDMDrvHlpSTAMDeregister(pDrvIns, &pThis->StatPktRecvBytes);
841 PDMDrvHlpSTAMDeregister(pDrvIns, &pThis->StatTransmit);
842 PDMDrvHlpSTAMDeregister(pDrvIns, &pThis->StatReceive);
843#endif /* VBOX_WITH_STATISTICS */
844}
845
846
847/**
848 * Construct a TAP network transport driver instance.
849 *
850 * @copydoc FNPDMDRVCONSTRUCT
851 */
852static DECLCALLBACK(int) drvTAPConstruct(PPDMDRVINS pDrvIns, PCFGMNODE pCfg, uint32_t fFlags)
853{
854 RT_NOREF(fFlags);
855 PDMDRV_CHECK_VERSIONS_RETURN(pDrvIns);
856 PDRVTAP pThis = PDMINS_2_DATA(pDrvIns, PDRVTAP);
857
858 /*
859 * Init the static parts.
860 */
861 pThis->pDrvIns = pDrvIns;
862 pThis->hFileDevice = NIL_RTFILE;
863 pThis->hPipeWrite = NIL_RTPIPE;
864 pThis->hPipeRead = NIL_RTPIPE;
865 pThis->pszDeviceName = NULL;
866#ifdef RT_OS_SOLARIS
867 pThis->iIPFileDes = -1;
868 pThis->fStatic = true;
869#endif
870 pThis->pszSetupApplication = NULL;
871 pThis->pszTerminateApplication = NULL;
872
873 /* IBase */
874 pDrvIns->IBase.pfnQueryInterface = drvTAPQueryInterface;
875 /* INetwork */
876 pThis->INetworkUp.pfnBeginXmit = drvTAPNetworkUp_BeginXmit;
877 pThis->INetworkUp.pfnAllocBuf = drvTAPNetworkUp_AllocBuf;
878 pThis->INetworkUp.pfnFreeBuf = drvTAPNetworkUp_FreeBuf;
879 pThis->INetworkUp.pfnSendBuf = drvTAPNetworkUp_SendBuf;
880 pThis->INetworkUp.pfnEndXmit = drvTAPNetworkUp_EndXmit;
881 pThis->INetworkUp.pfnSetPromiscuousMode = drvTAPNetworkUp_SetPromiscuousMode;
882 pThis->INetworkUp.pfnNotifyLinkChanged = drvTAPNetworkUp_NotifyLinkChanged;
883
884#ifdef VBOX_WITH_STATISTICS
885 /*
886 * Statistics.
887 */
888 PDMDrvHlpSTAMRegisterF(pDrvIns, &pThis->StatPktSent, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of sent packets.", "/Drivers/TAP%d/Packets/Sent", pDrvIns->iInstance);
889 PDMDrvHlpSTAMRegisterF(pDrvIns, &pThis->StatPktSentBytes, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_BYTES, "Number of sent bytes.", "/Drivers/TAP%d/Bytes/Sent", pDrvIns->iInstance);
890 PDMDrvHlpSTAMRegisterF(pDrvIns, &pThis->StatPktRecv, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_OCCURENCES, "Number of received packets.", "/Drivers/TAP%d/Packets/Received", pDrvIns->iInstance);
891 PDMDrvHlpSTAMRegisterF(pDrvIns, &pThis->StatPktRecvBytes, STAMTYPE_COUNTER, STAMVISIBILITY_ALWAYS, STAMUNIT_BYTES, "Number of received bytes.", "/Drivers/TAP%d/Bytes/Received", pDrvIns->iInstance);
892 PDMDrvHlpSTAMRegisterF(pDrvIns, &pThis->StatTransmit, STAMTYPE_PROFILE, STAMVISIBILITY_ALWAYS, STAMUNIT_TICKS_PER_CALL, "Profiling packet transmit runs.", "/Drivers/TAP%d/Transmit", pDrvIns->iInstance);
893 PDMDrvHlpSTAMRegisterF(pDrvIns, &pThis->StatReceive, STAMTYPE_PROFILE, STAMVISIBILITY_ALWAYS, STAMUNIT_TICKS_PER_CALL, "Profiling packet receive runs.", "/Drivers/TAP%d/Receive", pDrvIns->iInstance);
894#endif /* VBOX_WITH_STATISTICS */
895
896 /*
897 * Validate the config.
898 */
899 if (!CFGMR3AreValuesValid(pCfg, "Device\0InitProg\0TermProg\0FileHandle\0TAPSetupApplication\0TAPTerminateApplication\0MAC"))
900 return PDMDRV_SET_ERROR(pDrvIns, VERR_PDM_DRVINS_UNKNOWN_CFG_VALUES, "");
901
902 /*
903 * Check that no-one is attached to us.
904 */
905 AssertMsgReturn(PDMDrvHlpNoAttach(pDrvIns) == VERR_PDM_NO_ATTACHED_DRIVER,
906 ("Configuration error: Not possible to attach anything to this driver!\n"),
907 VERR_PDM_DRVINS_NO_ATTACH);
908
909 /*
910 * Query the network port interface.
911 */
912 pThis->pIAboveNet = PDMIBASE_QUERY_INTERFACE(pDrvIns->pUpBase, PDMINETWORKDOWN);
913 if (!pThis->pIAboveNet)
914 return PDMDRV_SET_ERROR(pDrvIns, VERR_PDM_MISSING_INTERFACE_ABOVE,
915 N_("Configuration error: The above device/driver didn't export the network port interface"));
916
917 /*
918 * Read the configuration.
919 */
920 int rc;
921#if defined(RT_OS_SOLARIS) /** @todo Other platforms' TAP code should be moved here from ConsoleImpl. */
922 rc = CFGMR3QueryStringAlloc(pCfg, "TAPSetupApplication", &pThis->pszSetupApplication);
923 if (RT_SUCCESS(rc))
924 {
925 if (!RTPathExists(pThis->pszSetupApplication))
926 return PDMDrvHlpVMSetError(pDrvIns, VERR_HOSTIF_INIT_FAILED, RT_SRC_POS,
927 N_("Invalid TAP setup program path: %s"), pThis->pszSetupApplication);
928 }
929 else if (rc != VERR_CFGM_VALUE_NOT_FOUND)
930 return PDMDRV_SET_ERROR(pDrvIns, rc, N_("Configuration error: failed to query \"TAPTerminateApplication\""));
931
932 rc = CFGMR3QueryStringAlloc(pCfg, "TAPTerminateApplication", &pThis->pszTerminateApplication);
933 if (RT_SUCCESS(rc))
934 {
935 if (!RTPathExists(pThis->pszTerminateApplication))
936 return PDMDrvHlpVMSetError(pDrvIns, VERR_HOSTIF_INIT_FAILED, RT_SRC_POS,
937 N_("Invalid TAP terminate program path: %s"), pThis->pszTerminateApplication);
938 }
939 else if (rc != VERR_CFGM_VALUE_NOT_FOUND)
940 return PDMDRV_SET_ERROR(pDrvIns, rc, N_("Configuration error: failed to query \"TAPTerminateApplication\""));
941
942 rc = CFGMR3QueryStringAlloc(pCfg, "Device", &pThis->pszDeviceName);
943 if (RT_FAILURE(rc))
944 pThis->fStatic = false;
945
946 /* Obtain the device name from the setup application (if none was specified). */
947 if (pThis->pszSetupApplication)
948 {
949 rc = drvTAPSetupApplication(pThis);
950 if (RT_FAILURE(rc))
951 return PDMDrvHlpVMSetError(pDrvIns, VERR_HOSTIF_INIT_FAILED, RT_SRC_POS,
952 N_("Error running TAP setup application. rc=%d"), rc);
953 }
954
955 /*
956 * Do the setup.
957 */
958 rc = SolarisTAPAttach(pThis);
959 if (RT_FAILURE(rc))
960 return rc;
961
962#else /* !RT_OS_SOLARIS */
963
964 uint64_t u64File;
965 rc = CFGMR3QueryU64(pCfg, "FileHandle", &u64File);
966 if (RT_FAILURE(rc))
967 return PDMDRV_SET_ERROR(pDrvIns, rc,
968 N_("Configuration error: Query for \"FileHandle\" 32-bit signed integer failed"));
969 pThis->hFileDevice = (RTFILE)(uintptr_t)u64File;
970 if (!RTFileIsValid(pThis->hFileDevice))
971 return PDMDrvHlpVMSetError(pDrvIns, VERR_INVALID_HANDLE, RT_SRC_POS,
972 N_("The TAP file handle %RTfile is not valid"), pThis->hFileDevice);
973#endif /* !RT_OS_SOLARIS */
974
975 /*
976 * Create the transmit lock.
977 */
978 rc = RTCritSectInit(&pThis->XmitLock);
979 AssertRCReturn(rc, rc);
980
981 /*
982 * Make sure the descriptor is non-blocking and valid.
983 *
984 * We should actually query if it's a TAP device, but I haven't
985 * found any way to do that.
986 */
987 if (fcntl(RTFileToNative(pThis->hFileDevice), F_SETFL, O_NONBLOCK) == -1)
988 return PDMDrvHlpVMSetError(pDrvIns, VERR_HOSTIF_IOCTL, RT_SRC_POS,
989 N_("Configuration error: Failed to configure /dev/net/tun. errno=%d"), errno);
990 /** @todo determine device name. This can be done by reading the link /proc/<pid>/fd/<fd> */
991 Log(("drvTAPContruct: %d (from fd)\n", (intptr_t)pThis->hFileDevice));
992 rc = VINF_SUCCESS;
993
994 /*
995 * Create the control pipe.
996 */
997 rc = RTPipeCreate(&pThis->hPipeRead, &pThis->hPipeWrite, 0 /*fFlags*/);
998 AssertRCReturn(rc, rc);
999
1000 /*
1001 * Create the async I/O thread.
1002 */
1003 rc = PDMDrvHlpThreadCreate(pDrvIns, &pThis->pThread, pThis, drvTAPAsyncIoThread, drvTapAsyncIoWakeup, 128 * _1K, RTTHREADTYPE_IO, "TAP");
1004 AssertRCReturn(rc, rc);
1005
1006 return rc;
1007}
1008
1009
1010/**
1011 * TAP network transport driver registration record.
1012 */
1013const PDMDRVREG g_DrvHostInterface =
1014{
1015 /* u32Version */
1016 PDM_DRVREG_VERSION,
1017 /* szName */
1018 "HostInterface",
1019 /* szRCMod */
1020 "",
1021 /* szR0Mod */
1022 "",
1023 /* pszDescription */
1024 "TAP Network Transport Driver",
1025 /* fFlags */
1026 PDM_DRVREG_FLAGS_HOST_BITS_DEFAULT,
1027 /* fClass. */
1028 PDM_DRVREG_CLASS_NETWORK,
1029 /* cMaxInstances */
1030 ~0U,
1031 /* cbInstance */
1032 sizeof(DRVTAP),
1033 /* pfnConstruct */
1034 drvTAPConstruct,
1035 /* pfnDestruct */
1036 drvTAPDestruct,
1037 /* pfnRelocate */
1038 NULL,
1039 /* pfnIOCtl */
1040 NULL,
1041 /* pfnPowerOn */
1042 NULL,
1043 /* pfnReset */
1044 NULL,
1045 /* pfnSuspend */
1046 NULL, /** @todo Do power on, suspend and resume handlers! */
1047 /* pfnResume */
1048 NULL,
1049 /* pfnAttach */
1050 NULL,
1051 /* pfnDetach */
1052 NULL,
1053 /* pfnPowerOff */
1054 NULL,
1055 /* pfnSoftReset */
1056 NULL,
1057 /* u32EndVersion */
1058 PDM_DRVREG_VERSION
1059};
1060
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