DrvTCP.cpp@ 94125

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1	/* $Id: DrvTCP.cpp 93115 2022-01-01 11:31:46Z vboxsync $ */
2	/** @file
3	* TCP socket driver implementing the IStream interface.
4	*/
5
6	/*
7	* Contributed by Alexey Eromenko (derived from DrvNamedPipe).
8	*
9	* Copyright (C) 2006-2022 Oracle Corporation
10	*
11	* This file is part of VirtualBox Open Source Edition (OSE), as
12	* available from http://www.virtualbox.org. This file is free software;
13	* you can redistribute it and/or modify it under the terms of the GNU
14	* General Public License (GPL) as published by the Free Software
15	* Foundation, in version 2 as it comes in the "COPYING" file of the
16	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
17	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
18	*/
19
20
21	/*********************************************************************************************************************************
22	* Header Files *
23	*********************************************************************************************************************************/
24	#define LOG_GROUP LOG_GROUP_DRV_TCP
25	#include <VBox/vmm/pdmdrv.h>
26	#include <iprt/assert.h>
27	#include <iprt/file.h>
28	#include <iprt/stream.h>
29	#include <iprt/alloc.h>
30	#include <iprt/pipe.h>
31	#include <iprt/poll.h>
32	#include <iprt/string.h>
33	#include <iprt/semaphore.h>
34	#include <iprt/socket.h>
35	#include <iprt/tcp.h>
36	#include <iprt/uuid.h>
37	#include <stdlib.h>
38
39	#include "VBoxDD.h"
40
41
42	/*********************************************************************************************************************************
43	* Defined Constants And Macros *
44	*********************************************************************************************************************************/
45
46	#define DRVTCP_POLLSET_ID_SOCKET 0
47	#define DRVTCP_POLLSET_ID_WAKEUP 1
48
49	#define DRVTCP_WAKEUP_REASON_EXTERNAL 0
50	#define DRVTCP_WAKEUP_REASON_NEW_CONNECTION 1
51
52
53	/*********************************************************************************************************************************
54	* Structures and Typedefs *
55	*********************************************************************************************************************************/
56	/**
57	* TCP driver instance data.
58	*
59	* @implements PDMISTREAM
60	*/
61	typedef struct DRVTCP
62	{
63	/** The stream interface. */
64	PDMISTREAM IStream;
65	/** Pointer to the driver instance. */
66	PPDMDRVINS pDrvIns;
67	/** Pointer to the TCP server address:port or port only. (Freed by MM) */
68	char *pszLocation;
69	/** Flag whether VirtualBox represents the server or client side. */
70	bool fIsServer;
71
72	/** Handle of the TCP server for incoming connections. */
73	PRTTCPSERVER hTcpServ;
74	/** Socket handle of the TCP socket connection. */
75	RTSOCKET hTcpSock;
76
77	/** Poll set used to wait for I/O events. */
78	RTPOLLSET hPollSet;
79	/** Reading end of the wakeup pipe. */
80	RTPIPE hPipeWakeR;
81	/** Writing end of the wakeup pipe. */
82	RTPIPE hPipeWakeW;
83	/** Flag whether the send buffer is full nad it is required to wait for more
84	* space until there is room again. */
85	bool fXmitBufFull;
86
87	/** Number of connections active. */
88	volatile uint32_t cConnections;
89	/** Thread for listening for new connections. */
90	RTTHREAD ListenThread;
91	/** Flag to signal listening thread to shut down. */
92	bool volatile fShutdown;
93	/** Flag to signal whether the thread was woken up from external. */
94	bool volatile fWokenUp;
95	} DRVTCP, *PDRVTCP;
96
97
98	/*********************************************************************************************************************************
99	* Internal Functions *
100	*********************************************************************************************************************************/
101
102
103	/**
104	* Kicks any possibly polling thread to get informed about changes - extended version
105	* sending additional data along with the wakeup reason.
106	*
107	* @returns VBOx status code.
108	* @param pThis The TCP driver instance.
109	* @param bReason The reason code to handle.
110	* @param pvData The additional to send along with the wakeup reason.
111	* @param cbData Number of bytes to send along.
112	*/
113	static int drvTcpPollerKickEx(PDRVTCP pThis, uint8_t bReason, const void *pvData, size_t cbData)
114	{
115	size_t cbWritten = 0;
116	int rc = RTPipeWriteBlocking(pThis->hPipeWakeW, &bReason, 1, &cbWritten);
117	if (RT_SUCCESS(rc))
118	rc = RTPipeWriteBlocking(pThis->hPipeWakeW, pvData, cbData, &cbWritten);
119	return rc;
120	}
121
122
123	/**
124	* Kicks any possibly polling thread to get informed about changes.
125	*
126	* @returns VBOx status code.
127	* @param pThis The TCP driver instance.
128	* @param bReason The reason code to handle.
129	*/
130	static int drvTcpPollerKick(PDRVTCP pThis, uint8_t bReason)
131	{
132	size_t cbWritten = 0;
133	return RTPipeWriteBlocking(pThis->hPipeWakeW, &bReason, 1, &cbWritten);
134	}
135
136
137	/**
138	* Closes the connection.
139	*
140	* @returns nothing.
141	* @param pThis The TCP driver instance.
142	*/
143	static void drvTcpConnectionClose(PDRVTCP pThis)
144	{
145	Assert(pThis->hTcpSock != NIL_RTSOCKET);
146
147	int rc = RTPollSetRemove(pThis->hPollSet, DRVTCP_POLLSET_ID_SOCKET);
148	AssertRC(rc);
149
150	if (pThis->fIsServer)
151	RTTcpServerDisconnectClient2(pThis->hTcpSock);
152	else
153	RTSocketClose(pThis->hTcpSock);
154	pThis->hTcpSock = NIL_RTSOCKET;
155	ASMAtomicDecU32(&pThis->cConnections);
156	}
157
158
159	/**
160	* Checks the wakeup pipe for events.
161	*
162	* @returns VBox status code.
163	* @param pThis The TCP driver instance.
164	* @param fEvts Event mask to set if a new connection arrived.
165	*/
166	static int drvTcpWakeupPipeCheckForRequest(PDRVTCP pThis, uint32_t fEvts)
167	{
168	int rc = VINF_SUCCESS;
169
170	while ( RT_SUCCESS(rc)
171	\|\| rc == VERR_INTERRUPTED)
172	{
173	uint8_t bReason;
174	size_t cbRead = 0;
175	int rc2 = RTPipeRead(pThis->hPipeWakeR, &bReason, 1, &cbRead);
176	if (rc2 == VINF_TRY_AGAIN) /* Nothing there so we are done here. */
177	break;
178	else if (RT_SUCCESS(rc2))
179	{
180	if (bReason == DRVTCP_WAKEUP_REASON_EXTERNAL)
181	{
182	ASMAtomicXchgBool(&pThis->fWokenUp, false);
183	rc = VERR_INTERRUPTED;
184	}
185	else if (bReason == DRVTCP_WAKEUP_REASON_NEW_CONNECTION)
186	{
187	Assert(pThis->hTcpSock == NIL_RTSOCKET);
188
189	/* Read the socket handle. */
190	RTSOCKET hTcpSockNew = NIL_RTSOCKET;
191	rc = RTPipeReadBlocking(pThis->hPipeWakeR, &hTcpSockNew, sizeof(hTcpSockNew), NULL);
192	AssertRC(rc);
193
194	/* Always include error event. */
195	fEvts \|= RTPOLL_EVT_ERROR;
196	rc = RTPollSetAddSocket(pThis->hPollSet, hTcpSockNew,
197	fEvts, DRVTCP_POLLSET_ID_SOCKET);
198	if (RT_SUCCESS(rc))
199	pThis->hTcpSock = hTcpSockNew;
200	}
201	else
202	AssertMsgFailed(("Unknown wakeup reason in pipe %u\n", bReason));
203	}
204	}
205
206	return rc;
207	}
208
209
210	/** @interface_method_impl{PDMISTREAM,pfnPoll} */
211	static DECLCALLBACK(int) drvTcpPoll(PPDMISTREAM pInterface, uint32_t fEvts, uint32_t *pfEvts, RTMSINTERVAL cMillies)
212	{
213	int rc = VINF_SUCCESS;
214	PDRVTCP pThis = RT_FROM_MEMBER(pInterface, DRVTCP, IStream);
215
216	if (pThis->hTcpSock != NIL_RTSOCKET)
217	{
218	Assert(ASMAtomicReadU32(&pThis->cConnections) > 0);
219
220	/* Always include error event. */
221	fEvts \|= RTPOLL_EVT_ERROR;
222	rc = RTPollSetEventsChange(pThis->hPollSet, DRVTCP_POLLSET_ID_SOCKET, fEvts);
223	AssertRC(rc);
224	}
225	else
226	{
227	/*
228	* Check whether new connection arrived first so we don't miss it in case
229	* the guest is constantly writing data and we always end up here.
230	*/
231	rc = drvTcpWakeupPipeCheckForRequest(pThis, fEvts);
232	if ( pThis->hTcpSock == NIL_RTSOCKET
233	&& (fEvts & RTPOLL_EVT_WRITE))
234	{
235	/*
236	* Just pretend we can always write to not fill up any buffers and block the guest
237	* from sending data.
238	*/
239	*pfEvts \|= RTPOLL_EVT_WRITE;
240	return rc;
241	}
242	}
243
244	if (RT_SUCCESS(rc))
245	{
246	while (RT_SUCCESS(rc))
247	{
248	uint32_t fEvtsRecv = 0;
249	uint32_t idHnd = 0;
250	uint64_t tsStartMs = RTTimeMilliTS();
251	RTMSINTERVAL cThisWaitMs = cMillies;
252
253	/*
254	* Just check for data available to be read if the send buffer wasn't full till now and
255	* the caller wants to check whether writing is possible with the event set.
256	*
257	* On Windows the write event is only posted after a send operation returned
258	* WSAEWOULDBLOCK. So without this we would block in the poll call below waiting
259	* for an event which would never happen if the buffer has space left.
260	*/
261	if ( (fEvts & RTPOLL_EVT_WRITE)
262	&& !pThis->fXmitBufFull
263	&& pThis->hTcpSock != NIL_RTSOCKET)
264	cThisWaitMs = 0;
265
266	rc = RTPoll(pThis->hPollSet, cThisWaitMs, &fEvtsRecv, &idHnd);
267
268	/* Adjust remaining time to wait. */
269	uint64_t tsPollSpanMs = RTTimeMilliTS() - tsStartMs;
270	cMillies -= RT_MIN(cMillies, tsPollSpanMs);
271	if (RT_SUCCESS(rc))
272	{
273	if (idHnd == DRVTCP_POLLSET_ID_WAKEUP)
274	{
275	/* We got woken up, drain the pipe and return. */
276	rc = drvTcpWakeupPipeCheckForRequest(pThis, fEvts);
277	}
278	else
279	{
280	Assert(idHnd == DRVTCP_POLLSET_ID_SOCKET);
281
282	/* On error we close the socket here. */
283	if (fEvtsRecv & RTPOLL_EVT_ERROR)
284	drvTcpConnectionClose(pThis); /* Continue with polling afterwards. */
285	else
286	{
287	if (fEvtsRecv & RTPOLL_EVT_WRITE)
288	pThis->fXmitBufFull = false;
289	else if (!pThis->fXmitBufFull)
290	fEvtsRecv \|= RTPOLL_EVT_WRITE;
291	*pfEvts = fEvtsRecv;
292	break;
293	}
294	}
295	}
296	else if ( rc == VERR_TIMEOUT
297	&& !pThis->fXmitBufFull)
298	{
299	*pfEvts = RTPOLL_EVT_WRITE;
300	rc = VINF_SUCCESS;
301	break;
302	}
303	}
304	}
305
306	return rc;
307	}
308
309
310	/** @interface_method_impl{PDMISTREAM,pfnPollInterrupt} */
311	static DECLCALLBACK(int) drvTcpPollInterrupt(PPDMISTREAM pInterface)
312	{
313	int rc = VINF_SUCCESS;
314	PDRVTCP pThis = RT_FROM_MEMBER(pInterface, DRVTCP, IStream);
315
316	if (!ASMAtomicXchgBool(&pThis->fWokenUp, true))
317	rc = drvTcpPollerKick(pThis, DRVTCP_WAKEUP_REASON_EXTERNAL);
318
319	return rc;
320	}
321
322
323	/** @interface_method_impl{PDMISTREAM,pfnRead} */
324	static DECLCALLBACK(int) drvTcpRead(PPDMISTREAM pInterface, void pvBuf, size_t pcbRead)
325	{
326	int rc = VINF_SUCCESS;
327	PDRVTCP pThis = RT_FROM_MEMBER(pInterface, DRVTCP, IStream);
328	LogFlow(("%s: pvBuf=%p pcbRead=%#x (%s)\n", __FUNCTION__, pvBuf, pcbRead, pThis->pszLocation));
329
330	Assert(pvBuf);
331
332	if (pThis->hTcpSock != NIL_RTSOCKET)
333	{
334	size_t cbRead;
335	size_t cbBuf = *pcbRead;
336	rc = RTSocketReadNB(pThis->hTcpSock, pvBuf, cbBuf, &cbRead);
337	if (RT_SUCCESS(rc))
338	{
339	if (!cbRead && rc != VINF_TRY_AGAIN)
340	{
341	drvTcpConnectionClose(pThis);
342	rc = VINF_SUCCESS;
343	}
344	*pcbRead = cbRead;
345	}
346	}
347	else
348	{
349	RTThreadSleep(100);
350	*pcbRead = 0;
351	}
352
353	LogFlow(("%s: pcbRead=%zu returns %Rrc\n", __FUNCTION__, pcbRead, rc));
354	return rc;
355	}
356
357
358	/** @interface_method_impl{PDMISTREAM,pfnWrite} */
359	static DECLCALLBACK(int) drvTcpWrite(PPDMISTREAM pInterface, const void pvBuf, size_t pcbWrite)
360	{
361	int rc = VINF_SUCCESS;
362	PDRVTCP pThis = RT_FROM_MEMBER(pInterface, DRVTCP, IStream);
363	LogFlow(("%s: pvBuf=%p pcbWrite=%#x (%s)\n", __FUNCTION__, pvBuf, pcbWrite, pThis->pszLocation));
364
365	Assert(pvBuf);
366	if (pThis->hTcpSock != NIL_RTSOCKET)
367	{
368	size_t cbBuf = *pcbWrite;
369	rc = RTSocketWriteNB(pThis->hTcpSock, pvBuf, cbBuf, pcbWrite);
370	if (rc == VINF_TRY_AGAIN)
371	{
372	Assert(*pcbWrite == 0);
373	pThis->fXmitBufFull = true;
374	rc = VERR_TIMEOUT;
375	}
376	}
377	/* else Just pretend we wrote everything to not block. */
378
379	LogFlow(("%s: returns %Rrc pcbWrite=%zu\n", __FUNCTION__, rc, pcbWrite));
380	return rc;
381	}
382
383
384	/**
385	* @interface_method_impl{PDMIBASE,pfnQueryInterface}
386	*/
387	static DECLCALLBACK(void ) drvTCPQueryInterface(PPDMIBASE pInterface, const char pszIID)
388	{
389	PPDMDRVINS pDrvIns = PDMIBASE_2_PDMDRV(pInterface);
390	PDRVTCP pThis = PDMINS_2_DATA(pDrvIns, PDRVTCP);
391	PDMIBASE_RETURN_INTERFACE(pszIID, PDMIBASE, &pDrvIns->IBase);
392	PDMIBASE_RETURN_INTERFACE(pszIID, PDMISTREAM, &pThis->IStream);
393	return NULL;
394	}
395
396
397	/* -=-=-=-=- listen thread -=-=-=-=- */
398
399	/**
400	* Receive thread loop.
401	*
402	* @returns VINF_SUCCESS
403	* @param hThreadSelf Thread handle to this thread.
404	* @param pvUser User argument.
405	*/
406	static DECLCALLBACK(int) drvTCPListenLoop(RTTHREAD hThreadSelf, void *pvUser)
407	{
408	RT_NOREF(hThreadSelf);
409	PDRVTCP pThis = (PDRVTCP)pvUser;
410
411	while (RT_LIKELY(!pThis->fShutdown))
412	{
413	RTSOCKET hTcpSockNew = NIL_RTSOCKET;
414	int rc = RTTcpServerListen2(pThis->hTcpServ, &hTcpSockNew);
415	if (RT_SUCCESS(rc))
416	{
417	if (ASMAtomicReadU32(&pThis->cConnections) > 0)
418	{
419	LogRel(("DrvTCP%d: only single connection supported\n", pThis->pDrvIns->iInstance));
420	RTTcpServerDisconnectClient2(hTcpSockNew);
421	}
422	else
423	{
424	ASMAtomicIncU32(&pThis->cConnections);
425
426	/* Inform the poller about the new socket. */
427	drvTcpPollerKickEx(pThis, DRVTCP_WAKEUP_REASON_NEW_CONNECTION, &hTcpSockNew, sizeof(hTcpSockNew));
428	}
429	}
430	}
431
432	return VINF_SUCCESS;
433	}
434
435	/* -=-=-=-=- PDMDRVREG -=-=-=-=- */
436
437	/**
438	* Common worker for drvTCPPowerOff and drvTCPDestructor.
439	*
440	* @param pThis The instance data.
441	*/
442	static void drvTCPShutdownListener(PDRVTCP pThis)
443	{
444	/*
445	* Signal shutdown of the listener thread.
446	*/
447	pThis->fShutdown = true;
448	if ( pThis->fIsServer
449	&& pThis->hTcpServ != NULL)
450	{
451	int rc = RTTcpServerShutdown(pThis->hTcpServ);
452	AssertRC(rc);
453	pThis->hTcpServ = NULL;
454	}
455	}
456
457
458	/**
459	* Power off a TCP socket stream driver instance.
460	*
461	* This does most of the destruction work, to avoid ordering dependencies.
462	*
463	* @param pDrvIns The driver instance data.
464	*/
465	static DECLCALLBACK(void) drvTCPPowerOff(PPDMDRVINS pDrvIns)
466	{
467	PDRVTCP pThis = PDMINS_2_DATA(pDrvIns, PDRVTCP);
468	LogFlow(("%s: %s\n", __FUNCTION__, pThis->pszLocation));
469
470	drvTCPShutdownListener(pThis);
471	}
472
473
474	/**
475	* Destruct a TCP socket stream driver instance.
476	*
477	* Most VM resources are freed by the VM. This callback is provided so that
478	* any non-VM resources can be freed correctly.
479	*
480	* @param pDrvIns The driver instance data.
481	*/
482	static DECLCALLBACK(void) drvTCPDestruct(PPDMDRVINS pDrvIns)
483	{
484	PDRVTCP pThis = PDMINS_2_DATA(pDrvIns, PDRVTCP);
485	LogFlow(("%s: %s\n", __FUNCTION__, pThis->pszLocation));
486	PDMDRV_CHECK_VERSIONS_RETURN_VOID(pDrvIns);
487
488	drvTCPShutdownListener(pThis);
489
490	/*
491	* While the thread exits, clean up as much as we can.
492	*/
493	if (pThis->hTcpSock != NIL_RTSOCKET)
494	{
495	int rc = RTPollSetRemove(pThis->hPollSet, DRVTCP_POLLSET_ID_SOCKET);
496	AssertRC(rc);
497
498	rc = RTSocketShutdown(pThis->hTcpSock, true /* fRead /, true / fWrite */);
499	AssertRC(rc);
500
501	rc = RTSocketClose(pThis->hTcpSock);
502	AssertRC(rc); RT_NOREF(rc);
503
504	pThis->hTcpSock = NIL_RTSOCKET;
505	}
506
507	if (pThis->hPipeWakeR != NIL_RTPIPE)
508	{
509	int rc = RTPipeClose(pThis->hPipeWakeR);
510	AssertRC(rc);
511
512	pThis->hPipeWakeR = NIL_RTPIPE;
513	}
514
515	if (pThis->hPipeWakeW != NIL_RTPIPE)
516	{
517	int rc = RTPipeClose(pThis->hPipeWakeW);
518	AssertRC(rc);
519
520	pThis->hPipeWakeW = NIL_RTPIPE;
521	}
522
523	if (pThis->hPollSet != NIL_RTPOLLSET)
524	{
525	int rc = RTPollSetDestroy(pThis->hPollSet);
526	AssertRC(rc);
527
528	pThis->hPollSet = NIL_RTPOLLSET;
529	}
530
531	PDMDrvHlpMMHeapFree(pDrvIns, pThis->pszLocation);
532	pThis->pszLocation = NULL;
533
534	/*
535	* Wait for the thread.
536	*/
537	if (pThis->ListenThread != NIL_RTTHREAD)
538	{
539	int rc = RTThreadWait(pThis->ListenThread, 30000, NULL);
540	if (RT_SUCCESS(rc))
541	pThis->ListenThread = NIL_RTTHREAD;
542	else
543	LogRel(("DrvTCP%d: listen thread did not terminate (%Rrc)\n", pDrvIns->iInstance, rc));
544	}
545	}
546
547
548	/**
549	* Construct a TCP socket stream driver instance.
550	*
551	* @copydoc FNPDMDRVCONSTRUCT
552	*/
553	static DECLCALLBACK(int) drvTCPConstruct(PPDMDRVINS pDrvIns, PCFGMNODE pCfg, uint32_t fFlags)
554	{
555	RT_NOREF(fFlags);
556	PDMDRV_CHECK_VERSIONS_RETURN(pDrvIns);
557	PDRVTCP pThis = PDMINS_2_DATA(pDrvIns, PDRVTCP);
558	PCPDMDRVHLPR3 pHlp = pDrvIns->pHlpR3;
559
560	/*
561	* Init the static parts.
562	*/
563	pThis->pDrvIns = pDrvIns;
564	pThis->pszLocation = NULL;
565	pThis->fIsServer = false;
566	pThis->fXmitBufFull = false;
567	pThis->cConnections = 0;
568
569	pThis->hTcpServ = NULL;
570	pThis->hTcpSock = NIL_RTSOCKET;
571
572	pThis->hPollSet = NIL_RTPOLLSET;
573	pThis->hPipeWakeR = NIL_RTPIPE;
574	pThis->hPipeWakeW = NIL_RTPIPE;
575
576	pThis->ListenThread = NIL_RTTHREAD;
577	pThis->fShutdown = false;
578	pThis->fWokenUp = false;
579	/* IBase */
580	pDrvIns->IBase.pfnQueryInterface = drvTCPQueryInterface;
581	/* IStream */
582	pThis->IStream.pfnPoll = drvTcpPoll;
583	pThis->IStream.pfnPollInterrupt = drvTcpPollInterrupt;
584	pThis->IStream.pfnRead = drvTcpRead;
585	pThis->IStream.pfnWrite = drvTcpWrite;
586
587	/*
588	* Validate and read the configuration.
589	*/
590	PDMDRV_VALIDATE_CONFIG_RETURN(pDrvIns, "Location\|IsServer", "");
591
592	int rc = pHlp->pfnCFGMQueryStringAlloc(pCfg, "Location", &pThis->pszLocation);
593	if (RT_FAILURE(rc))
594	return PDMDrvHlpVMSetError(pDrvIns, rc, RT_SRC_POS,
595	N_("Configuration error: querying \"Location\" resulted in %Rrc"), rc);
596	rc = pHlp->pfnCFGMQueryBool(pCfg, "IsServer", &pThis->fIsServer);
597	if (RT_FAILURE(rc))
598	return PDMDrvHlpVMSetError(pDrvIns, rc, RT_SRC_POS,
599	N_("Configuration error: querying \"IsServer\" resulted in %Rrc"), rc);
600
601	rc = RTPipeCreate(&pThis->hPipeWakeR, &pThis->hPipeWakeW, 0 /* fFlags */);
602	if (RT_FAILURE(rc))
603	return PDMDrvHlpVMSetError(pDrvIns, rc, RT_SRC_POS,
604	N_("DrvTCP#%d: Failed to create wake pipe"), pDrvIns->iInstance);
605
606	rc = RTPollSetCreate(&pThis->hPollSet);
607	if (RT_FAILURE(rc))
608	return PDMDrvHlpVMSetError(pDrvIns, rc, RT_SRC_POS,
609	N_("DrvTCP#%d: Failed to create poll set"), pDrvIns->iInstance);
610
611	rc = RTPollSetAddPipe(pThis->hPollSet, pThis->hPipeWakeR,
612	RTPOLL_EVT_READ \| RTPOLL_EVT_ERROR,
613	DRVTCP_POLLSET_ID_WAKEUP);
614	if (RT_FAILURE(rc))
615	return PDMDrvHlpVMSetError(pDrvIns, rc, RT_SRC_POS,
616	N_("DrvTCP#%d failed to add wakeup pipe for %s to poll set"),
617	pDrvIns->iInstance, pThis->pszLocation);
618
619	/*
620	* Create/Open the socket.
621	*/
622	if (pThis->fIsServer)
623	{
624	uint32_t uPort = 0;
625	rc = RTStrToUInt32Ex(pThis->pszLocation, NULL, 10, &uPort);
626	if (RT_FAILURE(rc))
627	return PDMDrvHlpVMSetError(pDrvIns, rc, RT_SRC_POS,
628	N_("DrvTCP#%d: The port part of the location is not a numerical value"),
629	pDrvIns->iInstance);
630
631	/** @todo Allow binding to distinct interfaces. */
632	rc = RTTcpServerCreateEx(NULL, uPort, &pThis->hTcpServ);
633	if (RT_FAILURE(rc))
634	return PDMDrvHlpVMSetError(pDrvIns, rc, RT_SRC_POS,
635	N_("DrvTCP#%d failed to create server socket"), pDrvIns->iInstance);
636
637	rc = RTThreadCreate(&pThis->ListenThread, drvTCPListenLoop, (void *)pThis, 0,
638	RTTHREADTYPE_IO, RTTHREADFLAGS_WAITABLE, "DrvTCPStream");
639	if (RT_FAILURE(rc))
640	return PDMDrvHlpVMSetError(pDrvIns, rc, RT_SRC_POS,
641	N_("DrvTCP#%d failed to create listening thread"), pDrvIns->iInstance);
642	}
643	else
644	{
645	char *pszPort = strchr(pThis->pszLocation, ':');
646	if (!pszPort)
647	return PDMDrvHlpVMSetError(pDrvIns, VERR_NOT_FOUND, RT_SRC_POS,
648	N_("DrvTCP#%d: The location misses the port to connect to"),
649	pDrvIns->iInstance);
650
651	pszPort = '\0'; / Overwrite temporarily to avoid copying the hostname into a temporary buffer. */
652	uint32_t uPort = 0;
653	rc = RTStrToUInt32Ex(pszPort + 1, NULL, 10, &uPort);
654	if (RT_FAILURE(rc))
655	return PDMDrvHlpVMSetError(pDrvIns, rc, RT_SRC_POS,
656	N_("DrvTCP#%d: The port part of the location is not a numerical value"),
657	pDrvIns->iInstance);
658
659	rc = RTTcpClientConnect(pThis->pszLocation, uPort, &pThis->hTcpSock);
660	pszPort = ':'; / Restore delimiter before checking the status. */
661	if (RT_FAILURE(rc))
662	return PDMDrvHlpVMSetError(pDrvIns, rc, RT_SRC_POS,
663	N_("DrvTCP#%d failed to connect to socket %s"),
664	pDrvIns->iInstance, pThis->pszLocation);
665
666	rc = RTPollSetAddSocket(pThis->hPollSet, pThis->hTcpSock,
667	RTPOLL_EVT_READ \| RTPOLL_EVT_WRITE \| RTPOLL_EVT_ERROR,
668	DRVTCP_POLLSET_ID_SOCKET);
669	if (RT_FAILURE(rc))
670	return PDMDrvHlpVMSetError(pDrvIns, rc, RT_SRC_POS,
671	N_("DrvTCP#%d failed to add socket for %s to poll set"),
672	pDrvIns->iInstance, pThis->pszLocation);
673
674	ASMAtomicIncU32(&pThis->cConnections);
675	}
676
677	LogRel(("DrvTCP: %s, %s\n", pThis->pszLocation, pThis->fIsServer ? "server" : "client"));
678	return VINF_SUCCESS;
679	}
680
681
682	/**
683	* TCP stream driver registration record.
684	*/
685	const PDMDRVREG g_DrvTCP =
686	{
687	/* u32Version */
688	PDM_DRVREG_VERSION,
689	/* szName */
690	"TCP",
691	/* szRCMod */
692	"",
693	/* szR0Mod */
694	"",
695	/* pszDescription */
696	"TCP serial stream driver.",
697	/* fFlags */
698	PDM_DRVREG_FLAGS_HOST_BITS_DEFAULT,
699	/* fClass. */
700	PDM_DRVREG_CLASS_STREAM,
701	/* cMaxInstances */
702	~0U,
703	/* cbInstance */
704	sizeof(DRVTCP),
705	/* pfnConstruct */
706	drvTCPConstruct,
707	/* pfnDestruct */
708	drvTCPDestruct,
709	/* pfnRelocate */
710	NULL,
711	/* pfnIOCtl */
712	NULL,
713	/* pfnPowerOn */
714	NULL,
715	/* pfnReset */
716	NULL,
717	/* pfnSuspend */
718	NULL,
719	/* pfnResume */
720	NULL,
721	/* pfnAttach */
722	NULL,
723	/* pfnDetach */
724	NULL,
725	/* pfnPowerOff */
726	drvTCPPowerOff,
727	/* pfnSoftReset */
728	NULL,
729	/* u32EndVersion */
730	PDM_DRVREG_VERSION
731	};
732

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source: vbox/trunk/src/VBox/Devices/Serial/DrvTCP.cpp@ 94125

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