socket.cpp@ 43176

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1	/* $Id: socket.cpp 43176 2012-09-04 17:50:31Z vboxsync $ */
2	/** @file
3	* IPRT - Network Sockets.
4	*/
5
6	/*
7	* Copyright (C) 2006-2012 Oracle Corporation
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.215389.xyz. 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	* The contents of this file may alternatively be used under the terms
18	* of the Common Development and Distribution License Version 1.0
19	* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
20	* VirtualBox OSE distribution, in which case the provisions of the
21	* CDDL are applicable instead of those of the GPL.
22	*
23	* You may elect to license modified versions of this file under the
24	* terms and conditions of either the GPL or the CDDL or both.
25	*/
26
27
28	/*******************************************************************************
29	* Header Files *
30	*******************************************************************************/
31	#ifdef RT_OS_WINDOWS
32	# include <winsock2.h>
33	# include <ws2tcpip.h>
34	#else /* !RT_OS_WINDOWS */
35	# include <errno.h>
36	# include <sys/stat.h>
37	# include <sys/socket.h>
38	# include <netinet/in.h>
39	# include <netinet/tcp.h>
40	# include <arpa/inet.h>
41	# ifdef IPRT_WITH_TCPIP_V6
42	# include <netinet6/in6.h>
43	# endif
44	# include <sys/un.h>
45	# include <netdb.h>
46	# include <unistd.h>
47	# include <fcntl.h>
48	# include <sys/uio.h>
49	#endif /* !RT_OS_WINDOWS */
50	#include <limits.h>
51
52	#include "internal/iprt.h"
53	#include <iprt/socket.h>
54
55	#include <iprt/alloca.h>
56	#include <iprt/asm.h>
57	#include <iprt/assert.h>
58	#include <iprt/ctype.h>
59	#include <iprt/err.h>
60	#include <iprt/mempool.h>
61	#include <iprt/poll.h>
62	#include <iprt/string.h>
63	#include <iprt/thread.h>
64	#include <iprt/time.h>
65	#include <iprt/mem.h>
66	#include <iprt/sg.h>
67	#include <iprt/log.h>
68
69	#include "internal/magics.h"
70	#include "internal/socket.h"
71	#include "internal/string.h"
72
73
74	/*******************************************************************************
75	* Defined Constants And Macros *
76	*******************************************************************************/
77	/* non-standard linux stuff (it seems). */
78	#ifndef MSG_NOSIGNAL
79	# define MSG_NOSIGNAL 0
80	#endif
81
82	/* Windows has different names for SHUT_XXX. */
83	#ifndef SHUT_RDWR
84	# ifdef SD_BOTH
85	# define SHUT_RDWR SD_BOTH
86	# else
87	# define SHUT_RDWR 2
88	# endif
89	#endif
90	#ifndef SHUT_WR
91	# ifdef SD_SEND
92	# define SHUT_WR SD_SEND
93	# else
94	# define SHUT_WR 1
95	# endif
96	#endif
97	#ifndef SHUT_RD
98	# ifdef SD_RECEIVE
99	# define SHUT_RD SD_RECEIVE
100	# else
101	# define SHUT_RD 0
102	# endif
103	#endif
104
105	/* fixup backlevel OSes. */
106	#if defined(RT_OS_OS2) \|\| defined(RT_OS_WINDOWS)
107	# define socklen_t int
108	#endif
109
110	/** How many pending connection. */
111	#define RTTCP_SERVER_BACKLOG 10
112
113
114	/*******************************************************************************
115	* Structures and Typedefs *
116	*******************************************************************************/
117	/**
118	* Socket handle data.
119	*
120	* This is mainly required for implementing RTPollSet on Windows.
121	*/
122	typedef struct RTSOCKETINT
123	{
124	/** Magic number (RTSOCKET_MAGIC). */
125	uint32_t u32Magic;
126	/** Exclusive user count.
127	* This is used to prevent two threads from accessing the handle concurrently.
128	* It can be higher than 1 if this handle is reference multiple times in a
129	* polling set (Windows). */
130	uint32_t volatile cUsers;
131	/** The native socket handle. */
132	RTSOCKETNATIVE hNative;
133	/** Indicates whether the handle has been closed or not. */
134	bool volatile fClosed;
135	/** Indicates whether the socket is operating in blocking or non-blocking mode
136	* currently. */
137	bool fBlocking;
138	#ifdef RT_OS_WINDOWS
139	/** The event semaphore we've associated with the socket handle.
140	* This is WSA_INVALID_EVENT if not done. */
141	WSAEVENT hEvent;
142	/** The pollset currently polling this socket. This is NIL if no one is
143	* polling. */
144	RTPOLLSET hPollSet;
145	/** The events we're polling for. */
146	uint32_t fPollEvts;
147	/** The events we're currently subscribing to with WSAEventSelect.
148	* This is ZERO if we're currently not subscribing to anything. */
149	uint32_t fSubscribedEvts;
150	/** Saved events which are only posted once. */
151	uint32_t fEventsSaved;
152	#endif /* RT_OS_WINDOWS */
153	} RTSOCKETINT;
154
155
156	/**
157	* Address union used internally for things like getpeername and getsockname.
158	*/
159	typedef union RTSOCKADDRUNION
160	{
161	struct sockaddr Addr;
162	struct sockaddr_in IPv4;
163	#ifdef IPRT_WITH_TCPIP_V6
164	struct sockaddr_in6 IPv6;
165	#endif
166	} RTSOCKADDRUNION;
167
168
169	/**
170	* Get the last error as an iprt status code.
171	*
172	* @returns IPRT status code.
173	*/
174	DECLINLINE(int) rtSocketError(void)
175	{
176	#ifdef RT_OS_WINDOWS
177	return RTErrConvertFromWin32(WSAGetLastError());
178	#else
179	return RTErrConvertFromErrno(errno);
180	#endif
181	}
182
183
184	/**
185	* Resets the last error.
186	*/
187	DECLINLINE(void) rtSocketErrorReset(void)
188	{
189	#ifdef RT_OS_WINDOWS
190	WSASetLastError(0);
191	#else
192	errno = 0;
193	#endif
194	}
195
196
197	/**
198	* Get the last resolver error as an iprt status code.
199	*
200	* @returns iprt status code.
201	*/
202	int rtSocketResolverError(void)
203	{
204	#ifdef RT_OS_WINDOWS
205	return RTErrConvertFromWin32(WSAGetLastError());
206	#else
207	switch (h_errno)
208	{
209	case HOST_NOT_FOUND:
210	return VERR_NET_HOST_NOT_FOUND;
211	case NO_DATA:
212	return VERR_NET_ADDRESS_NOT_AVAILABLE;
213	case NO_RECOVERY:
214	return VERR_IO_GEN_FAILURE;
215	case TRY_AGAIN:
216	return VERR_TRY_AGAIN;
217
218	default:
219	return VERR_UNRESOLVED_ERROR;
220	}
221	#endif
222	}
223
224
225	/**
226	* Converts from a native socket address to a generic IPRT network address.
227	*
228	* @returns IPRT status code.
229	* @param pSrc The source address.
230	* @param cbSrc The size of the source address.
231	* @param pAddr Where to return the generic IPRT network
232	* address.
233	*/
234	static int rtSocketNetAddrFromAddr(RTSOCKADDRUNION const *pSrc, size_t cbSrc, PRTNETADDR pAddr)
235	{
236	/*
237	* Convert the address.
238	*/
239	if ( cbSrc == sizeof(struct sockaddr_in)
240	&& pSrc->Addr.sa_family == AF_INET)
241	{
242	RT_ZERO(*pAddr);
243	pAddr->enmType = RTNETADDRTYPE_IPV4;
244	pAddr->uPort = RT_N2H_U16(pSrc->IPv4.sin_port);
245	pAddr->uAddr.IPv4.u = pSrc->IPv4.sin_addr.s_addr;
246	}
247	#ifdef IPRT_WITH_TCPIP_V6
248	else if ( cbSrc == sizeof(struct sockaddr_in6)
249	&& pSrc->Addr.sa_family == AF_INET6)
250	{
251	RT_ZERO(*pAddr);
252	pAddr->enmType = RTNETADDRTYPE_IPV6;
253	pAddr->uPort = RT_N2H_U16(pSrc->IPv6.sin6_port);
254	pAddr->uAddr.IPv6.au32[0] = pSrc->IPv6.sin6_addr.s6_addr32[0];
255	pAddr->uAddr.IPv6.au32[1] = pSrc->IPv6.sin6_addr.s6_addr32[1];
256	pAddr->uAddr.IPv6.au32[2] = pSrc->IPv6.sin6_addr.s6_addr32[2];
257	pAddr->uAddr.IPv6.au32[3] = pSrc->IPv6.sin6_addr.s6_addr32[3];
258	}
259	#endif
260	else
261	return VERR_NET_ADDRESS_FAMILY_NOT_SUPPORTED;
262	return VINF_SUCCESS;
263	}
264
265
266	/**
267	* Converts from a generic IPRT network address to a native socket address.
268	*
269	* @returns IPRT status code.
270	* @param pAddr Pointer to the generic IPRT network address.
271	* @param pDst The source address.
272	* @param cbSrc The size of the source address.
273	* @param pcbAddr Where to store the size of the returned address.
274	* Optional
275	*/
276	static int rtSocketAddrFromNetAddr(PCRTNETADDR pAddr, RTSOCKADDRUNION pDst, size_t cbDst, int pcbAddr)
277	{
278	RT_BZERO(pDst, cbDst);
279	if ( pAddr->enmType == RTNETADDRTYPE_IPV4
280	&& cbDst >= sizeof(struct sockaddr_in))
281	{
282	pDst->Addr.sa_family = AF_INET;
283	pDst->IPv4.sin_port = RT_H2N_U16(pAddr->uPort);
284	pDst->IPv4.sin_addr.s_addr = pAddr->uAddr.IPv4.u;
285	if (pcbAddr)
286	*pcbAddr = sizeof(pDst->IPv4);
287	}
288	#ifdef IPRT_WITH_TCPIP_V6
289	else if ( pAddr->enmType == RTNETADDRTYPE_IPV6
290	&& cbDst >= sizeof(struct sockaddr_in6))
291	{
292	pDst->Addr.sa_family = AF_INET6;
293	pDst->IPv6.sin6_port = RT_H2N_U16(pAddr->uPort);
294	pSrc->IPv6.sin6_addr.s6_addr32[0] = pAddr->uAddr.IPv6.au32[0];
295	pSrc->IPv6.sin6_addr.s6_addr32[1] = pAddr->uAddr.IPv6.au32[1];
296	pSrc->IPv6.sin6_addr.s6_addr32[2] = pAddr->uAddr.IPv6.au32[2];
297	pSrc->IPv6.sin6_addr.s6_addr32[3] = pAddr->uAddr.IPv6.au32[3];
298	if (pcbAddr)
299	*pcbAddr = sizeof(pDst->IPv6);
300	}
301	#endif
302	else
303	return VERR_NET_ADDRESS_FAMILY_NOT_SUPPORTED;
304	return VINF_SUCCESS;
305	}
306
307
308	/**
309	* Tries to lock the socket for exclusive usage by the calling thread.
310	*
311	* Call rtSocketUnlock() to unlock.
312	*
313	* @returns @c true if locked, @c false if not.
314	* @param pThis The socket structure.
315	*/
316	DECLINLINE(bool) rtSocketTryLock(RTSOCKETINT *pThis)
317	{
318	return ASMAtomicCmpXchgU32(&pThis->cUsers, 1, 0);
319	}
320
321
322	/**
323	* Unlocks the socket.
324	*
325	* @param pThis The socket structure.
326	*/
327	DECLINLINE(void) rtSocketUnlock(RTSOCKETINT *pThis)
328	{
329	ASMAtomicCmpXchgU32(&pThis->cUsers, 0, 1);
330	}
331
332
333	/**
334	* The slow path of rtSocketSwitchBlockingMode that does the actual switching.
335	*
336	* @returns IPRT status code.
337	* @param pThis The socket structure.
338	* @param fBlocking The desired mode of operation.
339	* @remarks Do not call directly.
340	*/
341	static int rtSocketSwitchBlockingModeSlow(RTSOCKETINT *pThis, bool fBlocking)
342	{
343	#ifdef RT_OS_WINDOWS
344	u_long uBlocking = fBlocking ? 0 : 1;
345	if (ioctlsocket(pThis->hNative, FIONBIO, &uBlocking))
346	return rtSocketError();
347
348	#else
349	int fFlags = fcntl(pThis->hNative, F_GETFL, 0);
350	if (fFlags == -1)
351	return rtSocketError();
352
353	if (fBlocking)
354	fFlags &= ~O_NONBLOCK;
355	else
356	fFlags \|= O_NONBLOCK;
357	if (fcntl(pThis->hNative, F_SETFL, fFlags) == -1)
358	return rtSocketError();
359	#endif
360
361	pThis->fBlocking = fBlocking;
362	return VINF_SUCCESS;
363	}
364
365
366	/**
367	* Switches the socket to the desired blocking mode if necessary.
368	*
369	* The socket must be locked.
370	*
371	* @returns IPRT status code.
372	* @param pThis The socket structure.
373	* @param fBlocking The desired mode of operation.
374	*/
375	DECLINLINE(int) rtSocketSwitchBlockingMode(RTSOCKETINT *pThis, bool fBlocking)
376	{
377	if (pThis->fBlocking != fBlocking)
378	return rtSocketSwitchBlockingModeSlow(pThis, fBlocking);
379	return VINF_SUCCESS;
380	}
381
382
383	/**
384	* Creates an IPRT socket handle for a native one.
385	*
386	* @returns IPRT status code.
387	* @param ppSocket Where to return the IPRT socket handle.
388	* @param hNative The native handle.
389	*/
390	int rtSocketCreateForNative(RTSOCKETINT **ppSocket, RTSOCKETNATIVE hNative)
391	{
392	RTSOCKETINT pThis = (RTSOCKETINT )RTMemPoolAlloc(RTMEMPOOL_DEFAULT, sizeof(*pThis));
393	if (!pThis)
394	return VERR_NO_MEMORY;
395	pThis->u32Magic = RTSOCKET_MAGIC;
396	pThis->cUsers = 0;
397	pThis->hNative = hNative;
398	pThis->fClosed = false;
399	pThis->fBlocking = true;
400	#ifdef RT_OS_WINDOWS
401	pThis->hEvent = WSA_INVALID_EVENT;
402	pThis->hPollSet = NIL_RTPOLLSET;
403	pThis->fPollEvts = 0;
404	pThis->fSubscribedEvts = 0;
405	#endif
406	*ppSocket = pThis;
407	return VINF_SUCCESS;
408	}
409
410
411	RTDECL(int) RTSocketFromNative(PRTSOCKET phSocket, RTHCINTPTR uNative)
412	{
413	AssertReturn(uNative != NIL_RTSOCKETNATIVE, VERR_INVALID_PARAMETER);
414	#ifndef RT_OS_WINDOWS
415	AssertReturn(uNative >= 0, VERR_INVALID_PARAMETER);
416	#endif
417	AssertPtrReturn(phSocket, VERR_INVALID_POINTER);
418	return rtSocketCreateForNative(phSocket, uNative);
419	}
420
421
422	/**
423	* Wrapper around socket().
424	*
425	* @returns IPRT status code.
426	* @param phSocket Where to store the handle to the socket on
427	* success.
428	* @param iDomain The protocol family (PF_XXX).
429	* @param iType The socket type (SOCK_XXX).
430	* @param iProtocol Socket parameter, usually 0.
431	*/
432	int rtSocketCreate(PRTSOCKET phSocket, int iDomain, int iType, int iProtocol)
433	{
434	/*
435	* Create the socket.
436	*/
437	RTSOCKETNATIVE hNative = socket(iDomain, iType, iProtocol);
438	if (hNative == NIL_RTSOCKETNATIVE)
439	return rtSocketError();
440
441	/*
442	* Wrap it.
443	*/
444	int rc = rtSocketCreateForNative(phSocket, hNative);
445	if (RT_FAILURE(rc))
446	{
447	#ifdef RT_OS_WINDOWS
448	closesocket(hNative);
449	#else
450	close(hNative);
451	#endif
452	}
453	return rc;
454	}
455
456
457	RTDECL(uint32_t) RTSocketRetain(RTSOCKET hSocket)
458	{
459	RTSOCKETINT *pThis = hSocket;
460	AssertPtrReturn(pThis, UINT32_MAX);
461	AssertReturn(pThis->u32Magic == RTSOCKET_MAGIC, UINT32_MAX);
462	return RTMemPoolRetain(pThis);
463	}
464
465
466	/**
467	* Worker for RTSocketRelease and RTSocketClose.
468	*
469	* @returns IPRT status code.
470	* @param pThis The socket handle instance data.
471	* @param fDestroy Whether we're reaching ref count zero.
472	*/
473	static int rtSocketCloseIt(RTSOCKETINT *pThis, bool fDestroy)
474	{
475	/*
476	* Invalidate the handle structure on destroy.
477	*/
478	if (fDestroy)
479	{
480	Assert(ASMAtomicReadU32(&pThis->u32Magic) == RTSOCKET_MAGIC);
481	ASMAtomicWriteU32(&pThis->u32Magic, RTSOCKET_MAGIC_DEAD);
482	}
483
484	int rc = VINF_SUCCESS;
485	if (ASMAtomicCmpXchgBool(&pThis->fClosed, true, false))
486	{
487	/*
488	* Close the native handle.
489	*/
490	RTSOCKETNATIVE hNative = pThis->hNative;
491	if (hNative != NIL_RTSOCKETNATIVE)
492	{
493	pThis->hNative = NIL_RTSOCKETNATIVE;
494
495	#ifdef RT_OS_WINDOWS
496	if (closesocket(hNative))
497	#else
498	if (close(hNative))
499	#endif
500	{
501	rc = rtSocketError();
502	#ifdef RT_OS_WINDOWS
503	AssertMsgFailed(("\"%s\": closesocket(%p) -> %Rrc\n", (uintptr_t)hNative, rc));
504	#else
505	AssertMsgFailed(("\"%s\": close(%d) -> %Rrc\n", hNative, rc));
506	#endif
507	}
508	}
509
510	#ifdef RT_OS_WINDOWS
511	/*
512	* Close the event.
513	*/
514	WSAEVENT hEvent = pThis->hEvent;
515	if (hEvent == WSA_INVALID_EVENT)
516	{
517	pThis->hEvent = WSA_INVALID_EVENT;
518	WSACloseEvent(hEvent);
519	}
520	#endif
521	}
522
523	return rc;
524	}
525
526
527	RTDECL(uint32_t) RTSocketRelease(RTSOCKET hSocket)
528	{
529	RTSOCKETINT *pThis = hSocket;
530	if (pThis == NIL_RTSOCKET)
531	return 0;
532	AssertPtrReturn(pThis, UINT32_MAX);
533	AssertReturn(pThis->u32Magic == RTSOCKET_MAGIC, UINT32_MAX);
534
535	/* get the refcount without killing it... */
536	uint32_t cRefs = RTMemPoolRefCount(pThis);
537	AssertReturn(cRefs != UINT32_MAX, UINT32_MAX);
538	if (cRefs == 1)
539	rtSocketCloseIt(pThis, true);
540
541	return RTMemPoolRelease(RTMEMPOOL_DEFAULT, pThis);
542	}
543
544
545	RTDECL(int) RTSocketClose(RTSOCKET hSocket)
546	{
547	RTSOCKETINT *pThis = hSocket;
548	if (pThis == NIL_RTSOCKET)
549	return VINF_SUCCESS;
550	AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
551	AssertReturn(pThis->u32Magic == RTSOCKET_MAGIC, VERR_INVALID_HANDLE);
552
553	uint32_t cRefs = RTMemPoolRefCount(pThis);
554	AssertReturn(cRefs != UINT32_MAX, UINT32_MAX);
555
556	int rc = rtSocketCloseIt(pThis, cRefs == 1);
557
558	RTMemPoolRelease(RTMEMPOOL_DEFAULT, pThis);
559	return rc;
560	}
561
562
563	RTDECL(RTHCUINTPTR) RTSocketToNative(RTSOCKET hSocket)
564	{
565	RTSOCKETINT *pThis = hSocket;
566	AssertPtrReturn(pThis, RTHCUINTPTR_MAX);
567	AssertReturn(pThis->u32Magic == RTSOCKET_MAGIC, RTHCUINTPTR_MAX);
568	return (RTHCUINTPTR)pThis->hNative;
569	}
570
571
572	RTDECL(int) RTSocketSetInheritance(RTSOCKET hSocket, bool fInheritable)
573	{
574	RTSOCKETINT *pThis = hSocket;
575	AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
576	AssertReturn(pThis->u32Magic == RTSOCKET_MAGIC, VERR_INVALID_HANDLE);
577	AssertReturn(RTMemPoolRefCount(pThis) >= (pThis->cUsers ? 2U : 1U), VERR_CALLER_NO_REFERENCE);
578
579	int rc = VINF_SUCCESS;
580	#ifdef RT_OS_WINDOWS
581	if (!SetHandleInformation((HANDLE)pThis->hNative, HANDLE_FLAG_INHERIT, fInheritable ? HANDLE_FLAG_INHERIT : 0))
582	rc = RTErrConvertFromWin32(GetLastError());
583	#else
584	if (fcntl(pThis->hNative, F_SETFD, fInheritable ? 0 : FD_CLOEXEC) < 0)
585	rc = RTErrConvertFromErrno(errno);
586	#endif
587
588	return rc;
589	}
590
591
592	static bool rtSocketIsIPv4Numerical(const char *pszAddress, PRTNETADDRIPV4 pAddr)
593	{
594
595	/* Empty address resolves to the INADDR_ANY address (good for bind). */
596	if (!pszAddress \|\| !*pszAddress)
597	{
598	pAddr->u = INADDR_ANY;
599	return true;
600	}
601
602	/* Four quads? */
603	char psz = (char )pszAddress;
604	for (int i = 0; i < 4; i++)
605	{
606	uint8_t u8;
607	int rc = RTStrToUInt8Ex(psz, &psz, 0, &u8);
608	if (rc != VINF_SUCCESS && rc != VWRN_TRAILING_CHARS)
609	return false;
610	if (*psz != (i < 3 ? '.' : '\0'))
611	return false;
612	psz++;
613
614	pAddr->au8[i] = u8; /* big endian */
615	}
616
617	return true;
618	}
619
620	RTDECL(int) RTSocketParseInetAddress(const char *pszAddress, unsigned uPort, PRTNETADDR pAddr)
621	{
622	int rc;
623
624	/*
625	* Validate input.
626	*/
627	AssertReturn(uPort > 0, VERR_INVALID_PARAMETER);
628	AssertPtrNullReturn(pszAddress, VERR_INVALID_POINTER);
629
630	#ifdef RT_OS_WINDOWS
631	/*
632	* Initialize WinSock and check version.
633	*/
634	WORD wVersionRequested = MAKEWORD(1, 1);
635	WSADATA wsaData;
636	rc = WSAStartup(wVersionRequested, &wsaData);
637	if (wsaData.wVersion != wVersionRequested)
638	{
639	AssertMsgFailed(("Wrong winsock version\n"));
640	return VERR_NOT_SUPPORTED;
641	}
642	#endif
643
644	/*
645	* Resolve the address. Pretty crude at the moment, but we have to make
646	* sure to not ask the NT 4 gethostbyname about an IPv4 address as it may
647	* give a wrong answer.
648	*/
649	/** @todo this only supports IPv4, and IPv6 support needs to be added.
650	* It probably needs to be converted to getaddrinfo(). */
651	RTNETADDRIPV4 IPv4Quad;
652	if (rtSocketIsIPv4Numerical(pszAddress, &IPv4Quad))
653	{
654	Log3(("rtSocketIsIPv4Numerical: %#x (%RTnaipv4)\n", pszAddress, IPv4Quad.u, IPv4Quad));
655	RT_ZERO(*pAddr);
656	pAddr->enmType = RTNETADDRTYPE_IPV4;
657	pAddr->uPort = uPort;
658	pAddr->uAddr.IPv4 = IPv4Quad;
659	return VINF_SUCCESS;
660	}
661
662	struct hostent *pHostEnt;
663	pHostEnt = gethostbyname(pszAddress);
664	if (!pHostEnt)
665	{
666	rc = rtSocketResolverError();
667	AssertMsgFailed(("Could not resolve '%s', rc=%Rrc\n", pszAddress, rc));
668	return rc;
669	}
670
671	if (pHostEnt->h_addrtype == AF_INET)
672	{
673	RT_ZERO(*pAddr);
674	pAddr->enmType = RTNETADDRTYPE_IPV4;
675	pAddr->uPort = uPort;
676	pAddr->uAddr.IPv4.u = ((struct in_addr *)pHostEnt->h_addr)->s_addr;
677	Log3(("gethostbyname: %s -> %#x (%RTnaipv4)\n", pszAddress, pAddr->uAddr.IPv4.u, pAddr->uAddr.IPv4));
678	}
679	else
680	return VERR_NET_ADDRESS_FAMILY_NOT_SUPPORTED;
681
682	return VINF_SUCCESS;
683	}
684
685
686	/*
687	* new function to allow ipv4 and ipv6 addresses to be resolved.
688	* breaks compatibility with windows before 2000
689	* will change when the new ipv6 struct will be added
690	* temporary solution
691	*/
692	RTDECL(int) RTSocketGetAddrInfo(const char psz, char pszResult, size_t *resultSize, PRTNETADDRTYPE pAddrType)
693	{
694	int rc = 0;
695	size_t resSize = 0;
696	uint8_t *pubDummy = NULL;
697
698	struct sockaddr_in *pgrSa = NULL;
699	struct sockaddr_in6 *pgrSa6 = NULL;
700
701	struct addrinfo grHints;
702	struct addrinfo pgrResults = NULL, pgrResult = NULL;
703
704	char szIpV4Address[16];
705	char szIpV6Address[40];
706	char szDummy[10];
707
708	char pszIpV4Address = NULL, pszIpV6Address = NULL;
709
710	memset(szIpV4Address, '\0', 16);
711	memset(szIpV6Address, '\0', 40);
712	memset(szDummy, '\0', 10);
713
714	memset(&grHints, 0, sizeof(struct addrinfo));
715
716	if (*resultSize < 16)
717	return VERR_NET_ADDRESS_NOT_AVAILABLE;
718
719	resSize = *resultSize;
720
721	grHints.ai_family = AF_UNSPEC;
722
723	if (*pAddrType == RTNETADDRTYPE_IPV6)
724	grHints.ai_family = AF_INET6;
725
726	if (*pAddrType == RTNETADDRTYPE_IPV4)
727	grHints.ai_family = AF_INET;
728
729	if (*pAddrType == RTNETADDRTYPE_INVALID \|\| !pAddrType) // yes, it's been set before...
730	grHints.ai_family = AF_UNSPEC;
731
732	grHints.ai_socktype = 0;
733	grHints.ai_flags = 0;
734	grHints.ai_protocol = 0;
735
736	#ifdef RT_OS_WINDOWS
737	/*
738	* Winsock2 init
739	*/
740	// FIXME someone should check if we really need 2, 2 here
741	WORD wVersionRequested = MAKEWORD(2, 2);
742	WSADATA wsaData;
743
744	rc = WSAStartup(wVersionRequested, &wsaData);
745
746	if (wsaData.wVersion != wVersionRequested)
747	{
748	AssertMsgFailed(("Wrong winsock version\n"));
749	return VERR_NOT_SUPPORTED;
750	}
751	#endif
752
753	rc = getaddrinfo(psz, "", &grHints, &pgrResults);
754
755	if (rc != 0)
756	return VERR_NET_ADDRESS_NOT_AVAILABLE;
757
758	// return data
759	// on multiple matches return only the first one
760
761	if (!pgrResults)
762	return VERR_NET_ADDRESS_NOT_AVAILABLE;
763
764	pgrResult = pgrResults->ai_next;
765
766	if (!pgrResult)
767	return VERR_NET_ADDRESS_NOT_AVAILABLE;
768
769	if (pgrResult->ai_family == AF_INET)
770	{
771	pgrSa = (sockaddr_in *)pgrResult->ai_addr;
772
773	pszIpV4Address = &szIpV4Address[0];
774
775	pubDummy = (uint8_t *)&pgrSa->sin_addr;
776
777	for (int i = 0; i < 4; i++)
778	{
779	memset(szDummy, '\0', 10);
780
781	size_t cb = RTStrPrintf(szDummy, 10, "%u", *pubDummy);
782
783	if (!cb \|\| cb > 3 \|\| cb < 1)
784	return VERR_NET_ADDRESS_NOT_AVAILABLE;
785
786	memcpy(pszIpV4Address, szDummy, cb);
787
788	pszIpV4Address = (pszIpV4Address + cb);
789
790	if (i < 3)
791	{
792	*pszIpV4Address = '.';
793	pszIpV4Address++;
794	}
795	pubDummy++;
796	}
797
798	pgrResult = NULL;
799	pgrSa = NULL;
800	pubDummy = NULL;
801	freeaddrinfo(pgrResults);
802
803	if (strlen(szIpV4Address) >= resSize)
804	{
805	memset(pszResult, 0, resSize);
806	*resultSize = strlen(szIpV4Address) + 1;
807	return VERR_BUFFER_OVERFLOW;
808	}
809	else
810	{
811	memcpy(pszResult, szIpV4Address, strlen(szIpV4Address));
812	*resultSize = strlen(szIpV4Address);
813	return VINF_SUCCESS;
814	}
815	}
816
817	if (pgrResult->ai_family == AF_INET6)
818	{
819	pgrSa6 = (sockaddr_in6 *) pgrResult->ai_addr;
820
821	pszIpV6Address = &szIpV6Address[0];
822
823	pubDummy = (uint8_t *) &pgrSa6->sin6_addr;
824
825	for (int i = 0; i < 16; i++)
826	{
827	memset(szDummy, '\0', 10);
828
829	size_t cb = RTStrPrintf(szDummy, 10, "%02x", *pubDummy);
830
831	if (cb != 2)
832	return VERR_NET_ADDRESS_NOT_AVAILABLE;
833
834	memcpy(pszIpV6Address, szDummy, cb);
835
836	pszIpV6Address = pszIpV6Address + cb;
837	pubDummy++;
838	}
839
840	pubDummy = NULL;
841	pgrSa6 = NULL;
842	pgrResult = NULL;
843	freeaddrinfo(pgrResults);
844
845	if (strlen(szIpV6Address) == 32)
846	{
847	if (strlen(szIpV6Address) + 8 >= resSize)
848	{
849	*resultSize = 41;
850	memset(pszResult, 0, resSize);
851	return VERR_BUFFER_OVERFLOW;
852	}
853	else
854	{
855	memset(pszResult, '\0', resSize);
856	rc = rtStrToIpAddr6Str(szIpV6Address, pszResult, resSize, NULL, 0, true);
857
858	if (rc != 0)
859	return VERR_NET_ADDRESS_NOT_AVAILABLE;
860
861	*resultSize = strlen(pszResult);
862
863	return VINF_SUCCESS;
864	}
865	}
866	else
867	{
868	return VERR_NET_ADDRESS_NOT_AVAILABLE;
869	}
870
871	} // AF_INET6
872	return VERR_NET_ADDRESS_NOT_AVAILABLE;
873	}
874
875
876	RTDECL(int) RTSocketRead(RTSOCKET hSocket, void pvBuffer, size_t cbBuffer, size_t pcbRead)
877	{
878	/*
879	* Validate input.
880	*/
881	RTSOCKETINT *pThis = hSocket;
882	AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
883	AssertReturn(pThis->u32Magic == RTSOCKET_MAGIC, VERR_INVALID_HANDLE);
884	AssertReturn(cbBuffer > 0, VERR_INVALID_PARAMETER);
885	AssertPtr(pvBuffer);
886	AssertReturn(rtSocketTryLock(pThis), VERR_CONCURRENT_ACCESS);
887
888	int rc = rtSocketSwitchBlockingMode(pThis, true /* fBlocking */);
889	if (RT_FAILURE(rc))
890	return rc;
891
892	/*
893	* Read loop.
894	* If pcbRead is NULL we have to fill the entire buffer!
895	*/
896	size_t cbRead = 0;
897	size_t cbToRead = cbBuffer;
898	for (;;)
899	{
900	rtSocketErrorReset();
901	#ifdef RT_OS_WINDOWS
902	int cbNow = cbToRead >= INT_MAX/2 ? INT_MAX/2 : (int)cbToRead;
903	#else
904	size_t cbNow = cbToRead;
905	#endif
906	ssize_t cbBytesRead = recv(pThis->hNative, (char *)pvBuffer + cbRead, cbNow, MSG_NOSIGNAL);
907	if (cbBytesRead <= 0)
908	{
909	rc = rtSocketError();
910	Assert(RT_FAILURE_NP(rc) \|\| cbBytesRead == 0);
911	if (RT_SUCCESS_NP(rc))
912	{
913	if (!pcbRead)
914	rc = VERR_NET_SHUTDOWN;
915	else
916	{
917	*pcbRead = 0;
918	rc = VINF_SUCCESS;
919	}
920	}
921	break;
922	}
923	if (pcbRead)
924	{
925	/* return partial data */
926	*pcbRead = cbBytesRead;
927	break;
928	}
929
930	/* read more? */
931	cbRead += cbBytesRead;
932	if (cbRead == cbBuffer)
933	break;
934
935	/* next */
936	cbToRead = cbBuffer - cbRead;
937	}
938
939	rtSocketUnlock(pThis);
940	return rc;
941	}
942
943
944	RTDECL(int) RTSocketReadFrom(RTSOCKET hSocket, void pvBuffer, size_t cbBuffer, size_t pcbRead, PRTNETADDR pSrcAddr)
945	{
946	/*
947	* Validate input.
948	*/
949	RTSOCKETINT *pThis = hSocket;
950	AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
951	AssertReturn(pThis->u32Magic == RTSOCKET_MAGIC, VERR_INVALID_HANDLE);
952	AssertReturn(cbBuffer > 0, VERR_INVALID_PARAMETER);
953	AssertPtr(pvBuffer);
954	AssertPtr(pcbRead);
955	AssertReturn(rtSocketTryLock(pThis), VERR_CONCURRENT_ACCESS);
956
957	int rc = rtSocketSwitchBlockingMode(pThis, true /* fBlocking */);
958	if (RT_FAILURE(rc))
959	return rc;
960
961	/*
962	* Read data.
963	*/
964	size_t cbRead = 0;
965	size_t cbToRead = cbBuffer;
966	rtSocketErrorReset();
967	RTSOCKADDRUNION u;
968	#ifdef RT_OS_WINDOWS
969	int cbNow = cbToRead >= INT_MAX/2 ? INT_MAX/2 : (int)cbToRead;
970	int cbAddr = sizeof(u);
971	#else
972	size_t cbNow = cbToRead;
973	socklen_t cbAddr = sizeof(u);
974	#endif
975	ssize_t cbBytesRead = recvfrom(pThis->hNative, (char *)pvBuffer + cbRead, cbNow, MSG_NOSIGNAL, &u.Addr, &cbAddr);
976	if (cbBytesRead <= 0)
977	{
978	rc = rtSocketError();
979	Assert(RT_FAILURE_NP(rc) \|\| cbBytesRead == 0);
980	if (RT_SUCCESS_NP(rc))
981	{
982	*pcbRead = 0;
983	rc = VINF_SUCCESS;
984	}
985	}
986	else
987	{
988	if (pSrcAddr)
989	rc = rtSocketNetAddrFromAddr(&u, cbAddr, pSrcAddr);
990	*pcbRead = cbBytesRead;
991	}
992
993	rtSocketUnlock(pThis);
994	return rc;
995	}
996
997
998	RTDECL(int) RTSocketWrite(RTSOCKET hSocket, const void *pvBuffer, size_t cbBuffer)
999	{
1000	/*
1001	* Validate input.
1002	*/
1003	RTSOCKETINT *pThis = hSocket;
1004	AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
1005	AssertReturn(pThis->u32Magic == RTSOCKET_MAGIC, VERR_INVALID_HANDLE);
1006	AssertReturn(rtSocketTryLock(pThis), VERR_CONCURRENT_ACCESS);
1007
1008	int rc = rtSocketSwitchBlockingMode(pThis, true /* fBlocking */);
1009	if (RT_FAILURE(rc))
1010	return rc;
1011
1012	/*
1013	* Try write all at once.
1014	*/
1015	#ifdef RT_OS_WINDOWS
1016	int cbNow = cbBuffer >= INT_MAX / 2 ? INT_MAX / 2 : (int)cbBuffer;
1017	#else
1018	size_t cbNow = cbBuffer >= SSIZE_MAX ? SSIZE_MAX : cbBuffer;
1019	#endif
1020	ssize_t cbWritten = send(pThis->hNative, (const char *)pvBuffer, cbNow, MSG_NOSIGNAL);
1021	if (RT_LIKELY((size_t)cbWritten == cbBuffer && cbWritten >= 0))
1022	rc = VINF_SUCCESS;
1023	else if (cbWritten < 0)
1024	rc = rtSocketError();
1025	else
1026	{
1027	/*
1028	* Unfinished business, write the remainder of the request. Must ignore
1029	* VERR_INTERRUPTED here if we've managed to send something.
1030	*/
1031	size_t cbSentSoFar = 0;
1032	for (;;)
1033	{
1034	/* advance */
1035	cbBuffer -= (size_t)cbWritten;
1036	if (!cbBuffer)
1037	break;
1038	cbSentSoFar += (size_t)cbWritten;
1039	pvBuffer = (char const *)pvBuffer + cbWritten;
1040
1041	/* send */
1042	#ifdef RT_OS_WINDOWS
1043	cbNow = cbBuffer >= INT_MAX / 2 ? INT_MAX / 2 : (int)cbBuffer;
1044	#else
1045	cbNow = cbBuffer >= SSIZE_MAX ? SSIZE_MAX : cbBuffer;
1046	#endif
1047	cbWritten = send(pThis->hNative, (const char *)pvBuffer, cbNow, MSG_NOSIGNAL);
1048	if (cbWritten >= 0)
1049	AssertMsg(cbBuffer >= (size_t)cbWritten, ("Wrote more than we requested!!! cbWritten=%zu cbBuffer=%zu rtSocketError()=%d\n",
1050	cbWritten, cbBuffer, rtSocketError()));
1051	else
1052	{
1053	rc = rtSocketError();
1054	if (rc != VERR_INTERNAL_ERROR \|\| cbSentSoFar == 0)
1055	break;
1056	cbWritten = 0;
1057	rc = VINF_SUCCESS;
1058	}
1059	}
1060	}
1061
1062	rtSocketUnlock(pThis);
1063	return rc;
1064	}
1065
1066
1067	RTDECL(int) RTSocketWriteTo(RTSOCKET hSocket, const void *pvBuffer, size_t cbBuffer, PCRTNETADDR pAddr)
1068	{
1069	/*
1070	* Validate input.
1071	*/
1072	RTSOCKETINT *pThis = hSocket;
1073	AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
1074	AssertReturn(pThis->u32Magic == RTSOCKET_MAGIC, VERR_INVALID_HANDLE);
1075
1076	/* no locking since UDP reads may be done concurrently to writes, and
1077	* this is the normal use case of this code. */
1078
1079	int rc = rtSocketSwitchBlockingMode(pThis, true /* fBlocking */);
1080	if (RT_FAILURE(rc))
1081	return rc;
1082
1083	/* Figure out destination address. */
1084	struct sockaddr *pSA = NULL;
1085	#ifdef RT_OS_WINDOWS
1086	int cbSA = 0;
1087	#else
1088	socklen_t cbSA = 0;
1089	#endif
1090	RTSOCKADDRUNION u;
1091	if (pAddr)
1092	{
1093	rc = rtSocketAddrFromNetAddr(pAddr, &u, sizeof(u), NULL);
1094	if (RT_FAILURE(rc))
1095	return rc;
1096	pSA = &u.Addr;
1097	cbSA = sizeof(u);
1098	}
1099
1100	/*
1101	* Must write all at once, otherwise it is a failure.
1102	*/
1103	#ifdef RT_OS_WINDOWS
1104	int cbNow = cbBuffer >= INT_MAX / 2 ? INT_MAX / 2 : (int)cbBuffer;
1105	#else
1106	size_t cbNow = cbBuffer >= SSIZE_MAX ? SSIZE_MAX : cbBuffer;
1107	#endif
1108	ssize_t cbWritten = sendto(pThis->hNative, (const char *)pvBuffer, cbNow, MSG_NOSIGNAL, pSA, cbSA);
1109	if (RT_LIKELY((size_t)cbWritten == cbBuffer && cbWritten >= 0))
1110	rc = VINF_SUCCESS;
1111	else if (cbWritten < 0)
1112	rc = rtSocketError();
1113	else
1114	rc = VERR_TOO_MUCH_DATA;
1115
1116	rtSocketUnlock(pThis);
1117	return rc;
1118	}
1119
1120
1121	RTDECL(int) RTSocketSgWrite(RTSOCKET hSocket, PCRTSGBUF pSgBuf)
1122	{
1123	/*
1124	* Validate input.
1125	*/
1126	RTSOCKETINT *pThis = hSocket;
1127	AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
1128	AssertReturn(pThis->u32Magic == RTSOCKET_MAGIC, VERR_INVALID_HANDLE);
1129	AssertPtrReturn(pSgBuf, VERR_INVALID_PARAMETER);
1130	AssertReturn(pSgBuf->cSegs > 0, VERR_INVALID_PARAMETER);
1131	AssertReturn(rtSocketTryLock(pThis), VERR_CONCURRENT_ACCESS);
1132
1133	int rc = rtSocketSwitchBlockingMode(pThis, true /* fBlocking */);
1134	if (RT_FAILURE(rc))
1135	return rc;
1136
1137	/*
1138	* Construct message descriptor (translate pSgBuf) and send it.
1139	*/
1140	rc = VERR_NO_TMP_MEMORY;
1141	#ifdef RT_OS_WINDOWS
1142	AssertCompileSize(WSABUF, sizeof(RTSGSEG));
1143	AssertCompileMemberSize(WSABUF, buf, RT_SIZEOFMEMB(RTSGSEG, pvSeg));
1144
1145	LPWSABUF paMsg = (LPWSABUF)RTMemTmpAllocZ(pSgBuf->cSegs * sizeof(WSABUF));
1146	if (paMsg)
1147	{
1148	for (unsigned i = 0; i < pSgBuf->cSegs; i++)
1149	{
1150	paMsg[i].buf = (char *)pSgBuf->paSegs[i].pvSeg;
1151	paMsg[i].len = (u_long)pSgBuf->paSegs[i].cbSeg;
1152	}
1153
1154	DWORD dwSent;
1155	int hrc = WSASend(pThis->hNative, paMsg, pSgBuf->cSegs, &dwSent,
1156	MSG_NOSIGNAL, NULL, NULL);
1157	if (!hrc)
1158	rc = VINF_SUCCESS;
1159	/** @todo check for incomplete writes */
1160	else
1161	rc = rtSocketError();
1162
1163	RTMemTmpFree(paMsg);
1164	}
1165
1166	#else /* !RT_OS_WINDOWS */
1167	AssertCompileSize(struct iovec, sizeof(RTSGSEG));
1168	AssertCompileMemberSize(struct iovec, iov_base, RT_SIZEOFMEMB(RTSGSEG, pvSeg));
1169	AssertCompileMemberSize(struct iovec, iov_len, RT_SIZEOFMEMB(RTSGSEG, cbSeg));
1170
1171	struct iovec paMsg = (struct iovec )RTMemTmpAllocZ(pSgBuf->cSegs * sizeof(struct iovec));
1172	if (paMsg)
1173	{
1174	for (unsigned i = 0; i < pSgBuf->cSegs; i++)
1175	{
1176	paMsg[i].iov_base = pSgBuf->paSegs[i].pvSeg;
1177	paMsg[i].iov_len = pSgBuf->paSegs[i].cbSeg;
1178	}
1179
1180	struct msghdr msgHdr;
1181	RT_ZERO(msgHdr);
1182	msgHdr.msg_iov = paMsg;
1183	msgHdr.msg_iovlen = pSgBuf->cSegs;
1184	ssize_t cbWritten = sendmsg(pThis->hNative, &msgHdr, MSG_NOSIGNAL);
1185	if (RT_LIKELY(cbWritten >= 0))
1186	rc = VINF_SUCCESS;
1187	/** @todo check for incomplete writes */
1188	else
1189	rc = rtSocketError();
1190
1191	RTMemTmpFree(paMsg);
1192	}
1193	#endif /* !RT_OS_WINDOWS */
1194
1195	rtSocketUnlock(pThis);
1196	return rc;
1197	}
1198
1199
1200	RTDECL(int) RTSocketSgWriteL(RTSOCKET hSocket, size_t cSegs, ...)
1201	{
1202	va_list va;
1203	va_start(va, cSegs);
1204	int rc = RTSocketSgWriteLV(hSocket, cSegs, va);
1205	va_end(va);
1206	return rc;
1207	}
1208
1209
1210	RTDECL(int) RTSocketSgWriteLV(RTSOCKET hSocket, size_t cSegs, va_list va)
1211	{
1212	/*
1213	* Set up a S/G segment array + buffer on the stack and pass it
1214	* on to RTSocketSgWrite.
1215	*/
1216	Assert(cSegs <= 16);
1217	PRTSGSEG paSegs = (PRTSGSEG)alloca(cSegs * sizeof(RTSGSEG));
1218	AssertReturn(paSegs, VERR_NO_TMP_MEMORY);
1219	for (size_t i = 0; i < cSegs; i++)
1220	{
1221	paSegs[i].pvSeg = va_arg(va, void *);
1222	paSegs[i].cbSeg = va_arg(va, size_t);
1223	}
1224
1225	RTSGBUF SgBuf;
1226	RTSgBufInit(&SgBuf, paSegs, cSegs);
1227	return RTSocketSgWrite(hSocket, &SgBuf);
1228	}
1229
1230
1231	RTDECL(int) RTSocketReadNB(RTSOCKET hSocket, void pvBuffer, size_t cbBuffer, size_t pcbRead)
1232	{
1233	/*
1234	* Validate input.
1235	*/
1236	RTSOCKETINT *pThis = hSocket;
1237	AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
1238	AssertReturn(pThis->u32Magic == RTSOCKET_MAGIC, VERR_INVALID_HANDLE);
1239	AssertReturn(cbBuffer > 0, VERR_INVALID_PARAMETER);
1240	AssertPtr(pvBuffer);
1241	AssertPtrReturn(pcbRead, VERR_INVALID_PARAMETER);
1242	AssertReturn(rtSocketTryLock(pThis), VERR_CONCURRENT_ACCESS);
1243
1244	int rc = rtSocketSwitchBlockingMode(pThis, false /* fBlocking */);
1245	if (RT_FAILURE(rc))
1246	return rc;
1247
1248	rtSocketErrorReset();
1249	#ifdef RT_OS_WINDOWS
1250	int cbNow = cbBuffer >= INT_MAX/2 ? INT_MAX/2 : (int)cbBuffer;
1251
1252	int cbRead = recv(pThis->hNative, (char *)pvBuffer, cbNow, MSG_NOSIGNAL);
1253	if (cbRead >= 0)
1254	{
1255	*pcbRead = cbRead;
1256	rc = VINF_SUCCESS;
1257	}
1258	else
1259	rc = rtSocketError();
1260
1261	if (rc == VERR_TRY_AGAIN)
1262	rc = VINF_TRY_AGAIN;
1263	#else
1264	ssize_t cbRead = recv(pThis->hNative, pvBuffer, cbBuffer, MSG_NOSIGNAL);
1265	if (cbRead >= 0)
1266	*pcbRead = cbRead;
1267	else if (errno == EAGAIN)
1268	{
1269	*pcbRead = 0;
1270	rc = VINF_TRY_AGAIN;
1271	}
1272	else
1273	rc = rtSocketError();
1274	#endif
1275
1276	rtSocketUnlock(pThis);
1277	return rc;
1278	}
1279
1280
1281	RTDECL(int) RTSocketWriteNB(RTSOCKET hSocket, const void pvBuffer, size_t cbBuffer, size_t pcbWritten)
1282	{
1283	/*
1284	* Validate input.
1285	*/
1286	RTSOCKETINT *pThis = hSocket;
1287	AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
1288	AssertReturn(pThis->u32Magic == RTSOCKET_MAGIC, VERR_INVALID_HANDLE);
1289	AssertPtrReturn(pcbWritten, VERR_INVALID_PARAMETER);
1290	AssertReturn(rtSocketTryLock(pThis), VERR_CONCURRENT_ACCESS);
1291
1292	int rc = rtSocketSwitchBlockingMode(pThis, false /* fBlocking */);
1293	if (RT_FAILURE(rc))
1294	return rc;
1295
1296	rtSocketErrorReset();
1297	#ifdef RT_OS_WINDOWS
1298	int cbNow = RT_MIN((int)cbBuffer, INT_MAX/2);
1299
1300	int cbWritten = send(pThis->hNative, (const char *)pvBuffer, cbNow, MSG_NOSIGNAL);
1301
1302	if (cbWritten >= 0)
1303	{
1304	*pcbWritten = cbWritten;
1305	rc = VINF_SUCCESS;
1306	}
1307	else
1308	rc = rtSocketError();
1309
1310	if (rc == VERR_TRY_AGAIN)
1311	rc = VINF_TRY_AGAIN;
1312	#else
1313	ssize_t cbWritten = send(pThis->hNative, pvBuffer, cbBuffer, MSG_NOSIGNAL);
1314	if (cbWritten >= 0)
1315	*pcbWritten = cbWritten;
1316	else if (errno == EAGAIN)
1317	{
1318	*pcbWritten = 0;
1319	rc = VINF_TRY_AGAIN;
1320	}
1321	else
1322	rc = rtSocketError();
1323	#endif
1324
1325	rtSocketUnlock(pThis);
1326	return rc;
1327	}
1328
1329
1330	RTDECL(int) RTSocketSgWriteNB(RTSOCKET hSocket, PCRTSGBUF pSgBuf, size_t *pcbWritten)
1331	{
1332	/*
1333	* Validate input.
1334	*/
1335	RTSOCKETINT *pThis = hSocket;
1336	AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
1337	AssertReturn(pThis->u32Magic == RTSOCKET_MAGIC, VERR_INVALID_HANDLE);
1338	AssertPtrReturn(pSgBuf, VERR_INVALID_PARAMETER);
1339	AssertPtrReturn(pcbWritten, VERR_INVALID_PARAMETER);
1340	AssertReturn(pSgBuf->cSegs > 0, VERR_INVALID_PARAMETER);
1341	AssertReturn(rtSocketTryLock(pThis), VERR_CONCURRENT_ACCESS);
1342
1343	int rc = rtSocketSwitchBlockingMode(pThis, false /* fBlocking */);
1344	if (RT_FAILURE(rc))
1345	return rc;
1346
1347	unsigned cSegsToSend = 0;
1348	rc = VERR_NO_TMP_MEMORY;
1349	#ifdef RT_OS_WINDOWS
1350	LPWSABUF paMsg = NULL;
1351
1352	RTSgBufMapToNative(paMsg, pSgBuf, WSABUF, buf, char *, len, u_long, cSegsToSend);
1353	if (paMsg)
1354	{
1355	DWORD dwSent = 0;
1356	int hrc = WSASend(pThis->hNative, paMsg, cSegsToSend, &dwSent,
1357	MSG_NOSIGNAL, NULL, NULL);
1358	if (!hrc)
1359	rc = VINF_SUCCESS;
1360	else
1361	rc = rtSocketError();
1362
1363	*pcbWritten = dwSent;
1364
1365	RTMemTmpFree(paMsg);
1366	}
1367
1368	#else /* !RT_OS_WINDOWS */
1369	struct iovec *paMsg = NULL;
1370
1371	RTSgBufMapToNative(paMsg, pSgBuf, struct iovec, iov_base, void *, iov_len, size_t, cSegsToSend);
1372	if (paMsg)
1373	{
1374	struct msghdr msgHdr;
1375	RT_ZERO(msgHdr);
1376	msgHdr.msg_iov = paMsg;
1377	msgHdr.msg_iovlen = cSegsToSend;
1378	ssize_t cbWritten = sendmsg(pThis->hNative, &msgHdr, MSG_NOSIGNAL);
1379	if (RT_LIKELY(cbWritten >= 0))
1380	{
1381	rc = VINF_SUCCESS;
1382	*pcbWritten = cbWritten;
1383	}
1384	else
1385	rc = rtSocketError();
1386
1387	RTMemTmpFree(paMsg);
1388	}
1389	#endif /* !RT_OS_WINDOWS */
1390
1391	rtSocketUnlock(pThis);
1392	return rc;
1393	}
1394
1395
1396	RTDECL(int) RTSocketSgWriteLNB(RTSOCKET hSocket, size_t cSegs, size_t *pcbWritten, ...)
1397	{
1398	va_list va;
1399	va_start(va, pcbWritten);
1400	int rc = RTSocketSgWriteLVNB(hSocket, cSegs, pcbWritten, va);
1401	va_end(va);
1402	return rc;
1403	}
1404
1405
1406	RTDECL(int) RTSocketSgWriteLVNB(RTSOCKET hSocket, size_t cSegs, size_t *pcbWritten, va_list va)
1407	{
1408	/*
1409	* Set up a S/G segment array + buffer on the stack and pass it
1410	* on to RTSocketSgWrite.
1411	*/
1412	Assert(cSegs <= 16);
1413	PRTSGSEG paSegs = (PRTSGSEG)alloca(cSegs * sizeof(RTSGSEG));
1414	AssertReturn(paSegs, VERR_NO_TMP_MEMORY);
1415	for (size_t i = 0; i < cSegs; i++)
1416	{
1417	paSegs[i].pvSeg = va_arg(va, void *);
1418	paSegs[i].cbSeg = va_arg(va, size_t);
1419	}
1420
1421	RTSGBUF SgBuf;
1422	RTSgBufInit(&SgBuf, paSegs, cSegs);
1423	return RTSocketSgWriteNB(hSocket, &SgBuf, pcbWritten);
1424	}
1425
1426
1427	RTDECL(int) RTSocketSelectOne(RTSOCKET hSocket, RTMSINTERVAL cMillies)
1428	{
1429	/*
1430	* Validate input.
1431	*/
1432	RTSOCKETINT *pThis = hSocket;
1433	AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
1434	AssertReturn(pThis->u32Magic == RTSOCKET_MAGIC, VERR_INVALID_HANDLE);
1435	AssertReturn(RTMemPoolRefCount(pThis) >= (pThis->cUsers ? 2U : 1U), VERR_CALLER_NO_REFERENCE);
1436	int const fdMax = (int)pThis->hNative + 1;
1437	AssertReturn(fdMax - 1 == pThis->hNative, VERR_INTERNAL_ERROR_5);
1438
1439	/*
1440	* Set up the file descriptor sets and do the select.
1441	*/
1442	fd_set fdsetR;
1443	FD_ZERO(&fdsetR);
1444	FD_SET(pThis->hNative, &fdsetR);
1445
1446	fd_set fdsetE = fdsetR;
1447
1448	int rc;
1449	if (cMillies == RT_INDEFINITE_WAIT)
1450	rc = select(fdMax, &fdsetR, NULL, &fdsetE, NULL);
1451	else
1452	{
1453	struct timeval timeout;
1454	timeout.tv_sec = cMillies / 1000;
1455	timeout.tv_usec = (cMillies % 1000) * 1000;
1456	rc = select(fdMax, &fdsetR, NULL, &fdsetE, &timeout);
1457	}
1458	if (rc > 0)
1459	rc = VINF_SUCCESS;
1460	else if (rc == 0)
1461	rc = VERR_TIMEOUT;
1462	else
1463	rc = rtSocketError();
1464
1465	return rc;
1466	}
1467
1468
1469	RTDECL(int) RTSocketSelectOneEx(RTSOCKET hSocket, uint32_t fEvents, uint32_t *pfEvents,
1470	RTMSINTERVAL cMillies)
1471	{
1472	/*
1473	* Validate input.
1474	*/
1475	RTSOCKETINT *pThis = hSocket;
1476	AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
1477	AssertReturn(pThis->u32Magic == RTSOCKET_MAGIC, VERR_INVALID_HANDLE);
1478	AssertPtrReturn(pfEvents, VERR_INVALID_PARAMETER);
1479	AssertReturn(!(fEvents & ~RTSOCKET_EVT_VALID_MASK), VERR_INVALID_PARAMETER);
1480	AssertReturn(RTMemPoolRefCount(pThis) >= (pThis->cUsers ? 2U : 1U), VERR_CALLER_NO_REFERENCE);
1481	int const fdMax = (int)pThis->hNative + 1;
1482	AssertReturn(fdMax - 1 == pThis->hNative, VERR_INTERNAL_ERROR_5);
1483
1484	*pfEvents = 0;
1485
1486	/*
1487	* Set up the file descriptor sets and do the select.
1488	*/
1489	fd_set fdsetR;
1490	fd_set fdsetW;
1491	fd_set fdsetE;
1492	FD_ZERO(&fdsetR);
1493	FD_ZERO(&fdsetW);
1494	FD_ZERO(&fdsetE);
1495
1496	if (fEvents & RTSOCKET_EVT_READ)
1497	FD_SET(pThis->hNative, &fdsetR);
1498	if (fEvents & RTSOCKET_EVT_WRITE)
1499	FD_SET(pThis->hNative, &fdsetW);
1500	if (fEvents & RTSOCKET_EVT_ERROR)
1501	FD_SET(pThis->hNative, &fdsetE);
1502
1503	int rc;
1504	if (cMillies == RT_INDEFINITE_WAIT)
1505	rc = select(fdMax, &fdsetR, &fdsetW, &fdsetE, NULL);
1506	else
1507	{
1508	struct timeval timeout;
1509	timeout.tv_sec = cMillies / 1000;
1510	timeout.tv_usec = (cMillies % 1000) * 1000;
1511	rc = select(fdMax, &fdsetR, &fdsetW, &fdsetE, &timeout);
1512	}
1513	if (rc > 0)
1514	{
1515	if (FD_ISSET(pThis->hNative, &fdsetR))
1516	*pfEvents \|= RTSOCKET_EVT_READ;
1517	if (FD_ISSET(pThis->hNative, &fdsetW))
1518	*pfEvents \|= RTSOCKET_EVT_WRITE;
1519	if (FD_ISSET(pThis->hNative, &fdsetE))
1520	*pfEvents \|= RTSOCKET_EVT_ERROR;
1521
1522	rc = VINF_SUCCESS;
1523	}
1524	else if (rc == 0)
1525	rc = VERR_TIMEOUT;
1526	else
1527	rc = rtSocketError();
1528
1529	return rc;
1530	}
1531
1532
1533	RTDECL(int) RTSocketShutdown(RTSOCKET hSocket, bool fRead, bool fWrite)
1534	{
1535	/*
1536	* Validate input, don't lock it because we might want to interrupt a call
1537	* active on a different thread.
1538	*/
1539	RTSOCKETINT *pThis = hSocket;
1540	AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
1541	AssertReturn(pThis->u32Magic == RTSOCKET_MAGIC, VERR_INVALID_HANDLE);
1542	AssertReturn(RTMemPoolRefCount(pThis) >= (pThis->cUsers ? 2U : 1U), VERR_CALLER_NO_REFERENCE);
1543	AssertReturn(fRead \|\| fWrite, VERR_INVALID_PARAMETER);
1544
1545	/*
1546	* Do the job.
1547	*/
1548	int rc = VINF_SUCCESS;
1549	int fHow;
1550	if (fRead && fWrite)
1551	fHow = SHUT_RDWR;
1552	else if (fRead)
1553	fHow = SHUT_RD;
1554	else
1555	fHow = SHUT_WR;
1556	if (shutdown(pThis->hNative, fHow) == -1)
1557	rc = rtSocketError();
1558
1559	return rc;
1560	}
1561
1562
1563	RTDECL(int) RTSocketGetLocalAddress(RTSOCKET hSocket, PRTNETADDR pAddr)
1564	{
1565	/*
1566	* Validate input.
1567	*/
1568	RTSOCKETINT *pThis = hSocket;
1569	AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
1570	AssertReturn(pThis->u32Magic == RTSOCKET_MAGIC, VERR_INVALID_HANDLE);
1571	AssertReturn(RTMemPoolRefCount(pThis) >= (pThis->cUsers ? 2U : 1U), VERR_CALLER_NO_REFERENCE);
1572
1573	/*
1574	* Get the address and convert it.
1575	*/
1576	int rc;
1577	RTSOCKADDRUNION u;
1578	#ifdef RT_OS_WINDOWS
1579	int cbAddr = sizeof(u);
1580	#else
1581	socklen_t cbAddr = sizeof(u);
1582	#endif
1583	RT_ZERO(u);
1584	if (getsockname(pThis->hNative, &u.Addr, &cbAddr) == 0)
1585	rc = rtSocketNetAddrFromAddr(&u, cbAddr, pAddr);
1586	else
1587	rc = rtSocketError();
1588
1589	return rc;
1590	}
1591
1592
1593	RTDECL(int) RTSocketGetPeerAddress(RTSOCKET hSocket, PRTNETADDR pAddr)
1594	{
1595	/*
1596	* Validate input.
1597	*/
1598	RTSOCKETINT *pThis = hSocket;
1599	AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
1600	AssertReturn(pThis->u32Magic == RTSOCKET_MAGIC, VERR_INVALID_HANDLE);
1601	AssertReturn(RTMemPoolRefCount(pThis) >= (pThis->cUsers ? 2U : 1U), VERR_CALLER_NO_REFERENCE);
1602
1603	/*
1604	* Get the address and convert it.
1605	*/
1606	int rc;
1607	RTSOCKADDRUNION u;
1608	#ifdef RT_OS_WINDOWS
1609	int cbAddr = sizeof(u);
1610	#else
1611	socklen_t cbAddr = sizeof(u);
1612	#endif
1613	RT_ZERO(u);
1614	if (getpeername(pThis->hNative, &u.Addr, &cbAddr) == 0)
1615	rc = rtSocketNetAddrFromAddr(&u, cbAddr, pAddr);
1616	else
1617	rc = rtSocketError();
1618
1619	return rc;
1620	}
1621
1622
1623
1624	/**
1625	* Wrapper around bind.
1626	*
1627	* @returns IPRT status code.
1628	* @param hSocket The socket handle.
1629	* @param pAddr The address to bind to.
1630	*/
1631	int rtSocketBind(RTSOCKET hSocket, PCRTNETADDR pAddr)
1632	{
1633	/*
1634	* Validate input.
1635	*/
1636	RTSOCKETINT *pThis = hSocket;
1637	AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
1638	AssertReturn(pThis->u32Magic == RTSOCKET_MAGIC, VERR_INVALID_HANDLE);
1639	AssertReturn(rtSocketTryLock(pThis), VERR_CONCURRENT_ACCESS);
1640
1641	RTSOCKADDRUNION u;
1642	int cbAddr;
1643	int rc = rtSocketAddrFromNetAddr(pAddr, &u, sizeof(u), &cbAddr);
1644	if (RT_SUCCESS(rc))
1645	{
1646	if (bind(pThis->hNative, &u.Addr, cbAddr) != 0)
1647	rc = rtSocketError();
1648	}
1649
1650	rtSocketUnlock(pThis);
1651	return rc;
1652	}
1653
1654
1655	/**
1656	* Wrapper around listen.
1657	*
1658	* @returns IPRT status code.
1659	* @param hSocket The socket handle.
1660	* @param cMaxPending The max number of pending connections.
1661	*/
1662	int rtSocketListen(RTSOCKET hSocket, int cMaxPending)
1663	{
1664	/*
1665	* Validate input.
1666	*/
1667	RTSOCKETINT *pThis = hSocket;
1668	AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
1669	AssertReturn(pThis->u32Magic == RTSOCKET_MAGIC, VERR_INVALID_HANDLE);
1670	AssertReturn(rtSocketTryLock(pThis), VERR_CONCURRENT_ACCESS);
1671
1672	int rc = VINF_SUCCESS;
1673	if (listen(pThis->hNative, cMaxPending) != 0)
1674	rc = rtSocketError();
1675
1676	rtSocketUnlock(pThis);
1677	return rc;
1678	}
1679
1680
1681	/**
1682	* Wrapper around accept.
1683	*
1684	* @returns IPRT status code.
1685	* @param hSocket The socket handle.
1686	* @param phClient Where to return the client socket handle on
1687	* success.
1688	* @param pAddr Where to return the client address.
1689	* @param pcbAddr On input this gives the size buffer size of what
1690	* @a pAddr point to. On return this contains the
1691	* size of what's stored at @a pAddr.
1692	*/
1693	int rtSocketAccept(RTSOCKET hSocket, PRTSOCKET phClient, struct sockaddr pAddr, size_t pcbAddr)
1694	{
1695	/*
1696	* Validate input.
1697	* Only lock the socket temporarily while we get the native handle, so that
1698	* we can safely shutdown and destroy the socket from a different thread.
1699	*/
1700	RTSOCKETINT *pThis = hSocket;
1701	AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
1702	AssertReturn(pThis->u32Magic == RTSOCKET_MAGIC, VERR_INVALID_HANDLE);
1703	AssertReturn(rtSocketTryLock(pThis), VERR_CONCURRENT_ACCESS);
1704
1705	/*
1706	* Call accept().
1707	*/
1708	rtSocketErrorReset();
1709	int rc = VINF_SUCCESS;
1710	#ifdef RT_OS_WINDOWS
1711	int cbAddr = (int)*pcbAddr;
1712	#else
1713	socklen_t cbAddr = *pcbAddr;
1714	#endif
1715	RTSOCKETNATIVE hNativeClient = accept(pThis->hNative, pAddr, &cbAddr);
1716	if (hNativeClient != NIL_RTSOCKETNATIVE)
1717	{
1718	*pcbAddr = cbAddr;
1719
1720	/*
1721	* Wrap the client socket.
1722	*/
1723	rc = rtSocketCreateForNative(phClient, hNativeClient);
1724	if (RT_FAILURE(rc))
1725	{
1726	#ifdef RT_OS_WINDOWS
1727	closesocket(hNativeClient);
1728	#else
1729	close(hNativeClient);
1730	#endif
1731	}
1732	}
1733	else
1734	rc = rtSocketError();
1735
1736	rtSocketUnlock(pThis);
1737	return rc;
1738	}
1739
1740
1741	/**
1742	* Wrapper around connect.
1743	*
1744	* @returns IPRT status code.
1745	* @param hSocket The socket handle.
1746	* @param pAddr The socket address to connect to.
1747	*/
1748	int rtSocketConnect(RTSOCKET hSocket, PCRTNETADDR pAddr)
1749	{
1750	/*
1751	* Validate input.
1752	*/
1753	RTSOCKETINT *pThis = hSocket;
1754	AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
1755	AssertReturn(pThis->u32Magic == RTSOCKET_MAGIC, VERR_INVALID_HANDLE);
1756	AssertReturn(rtSocketTryLock(pThis), VERR_CONCURRENT_ACCESS);
1757
1758	RTSOCKADDRUNION u;
1759	int cbAddr;
1760	int rc = rtSocketAddrFromNetAddr(pAddr, &u, sizeof(u), &cbAddr);
1761	if (RT_SUCCESS(rc))
1762	{
1763	if (connect(pThis->hNative, &u.Addr, cbAddr) != 0)
1764	rc = rtSocketError();
1765	}
1766
1767	rtSocketUnlock(pThis);
1768	return rc;
1769	}
1770
1771
1772	/**
1773	* Wrapper around setsockopt.
1774	*
1775	* @returns IPRT status code.
1776	* @param hSocket The socket handle.
1777	* @param iLevel The protocol level, e.g. IPPORTO_TCP.
1778	* @param iOption The option, e.g. TCP_NODELAY.
1779	* @param pvValue The value buffer.
1780	* @param cbValue The size of the value pointed to by pvValue.
1781	*/
1782	int rtSocketSetOpt(RTSOCKET hSocket, int iLevel, int iOption, void const *pvValue, int cbValue)
1783	{
1784	/*
1785	* Validate input.
1786	*/
1787	RTSOCKETINT *pThis = hSocket;
1788	AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
1789	AssertReturn(pThis->u32Magic == RTSOCKET_MAGIC, VERR_INVALID_HANDLE);
1790	AssertReturn(rtSocketTryLock(pThis), VERR_CONCURRENT_ACCESS);
1791
1792	int rc = VINF_SUCCESS;
1793	if (setsockopt(pThis->hNative, iLevel, iOption, (const char *)pvValue, cbValue) != 0)
1794	rc = rtSocketError();
1795
1796	rtSocketUnlock(pThis);
1797	return rc;
1798	}
1799
1800	#ifdef RT_OS_WINDOWS
1801
1802	/**
1803	* Internal RTPollSetAdd helper that returns the handle that should be added to
1804	* the pollset.
1805	*
1806	* @returns Valid handle on success, INVALID_HANDLE_VALUE on failure.
1807	* @param hSocket The socket handle.
1808	* @param fEvents The events we're polling for.
1809	* @param ph where to put the primary handle.
1810	*/
1811	int rtSocketPollGetHandle(RTSOCKET hSocket, uint32_t fEvents, PHANDLE ph)
1812	{
1813	RTSOCKETINT *pThis = hSocket;
1814	AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
1815	AssertReturn(pThis->u32Magic == RTSOCKET_MAGIC, VERR_INVALID_HANDLE);
1816	AssertReturn(rtSocketTryLock(pThis), VERR_CONCURRENT_ACCESS);
1817
1818	int rc = VINF_SUCCESS;
1819	if (pThis->hEvent != WSA_INVALID_EVENT)
1820	*ph = pThis->hEvent;
1821	else
1822	{
1823	*ph = pThis->hEvent = WSACreateEvent();
1824	if (pThis->hEvent == WSA_INVALID_EVENT)
1825	rc = rtSocketError();
1826	}
1827
1828	rtSocketUnlock(pThis);
1829	return rc;
1830	}
1831
1832
1833	/**
1834	* Undos the harm done by WSAEventSelect.
1835	*
1836	* @returns IPRT status code.
1837	* @param pThis The socket handle.
1838	*/
1839	static int rtSocketPollClearEventAndRestoreBlocking(RTSOCKETINT *pThis)
1840	{
1841	int rc = VINF_SUCCESS;
1842	if (pThis->fSubscribedEvts)
1843	{
1844	if (WSAEventSelect(pThis->hNative, WSA_INVALID_EVENT, 0) == 0)
1845	{
1846	pThis->fSubscribedEvts = 0;
1847
1848	/*
1849	* Switch back to blocking mode if that was the state before the
1850	* operation.
1851	*/
1852	if (pThis->fBlocking)
1853	{
1854	u_long fNonBlocking = 0;
1855	int rc2 = ioctlsocket(pThis->hNative, FIONBIO, &fNonBlocking);
1856	if (rc2 != 0)
1857	{
1858	rc = rtSocketError();
1859	AssertMsgFailed(("%Rrc; rc2=%d\n", rc, rc2));
1860	}
1861	}
1862	}
1863	else
1864	{
1865	rc = rtSocketError();
1866	AssertMsgFailed(("%Rrc\n", rc));
1867	}
1868	}
1869	return rc;
1870	}
1871
1872
1873	/**
1874	* Updates the mask of events we're subscribing to.
1875	*
1876	* @returns IPRT status code.
1877	* @param pThis The socket handle.
1878	* @param fEvents The events we want to subscribe to.
1879	*/
1880	static int rtSocketPollUpdateEvents(RTSOCKETINT *pThis, uint32_t fEvents)
1881	{
1882	LONG fNetworkEvents = 0;
1883	if (fEvents & RTPOLL_EVT_READ)
1884	fNetworkEvents \|= FD_READ;
1885	if (fEvents & RTPOLL_EVT_WRITE)
1886	fNetworkEvents \|= FD_WRITE;
1887	if (fEvents & RTPOLL_EVT_ERROR)
1888	fNetworkEvents \|= FD_CLOSE;
1889	LogFlowFunc(("fNetworkEvents=%#x\n", fNetworkEvents));
1890	if (WSAEventSelect(pThis->hNative, pThis->hEvent, fNetworkEvents) == 0)
1891	{
1892	pThis->fSubscribedEvts = fEvents;
1893	return VINF_SUCCESS;
1894	}
1895
1896	int rc = rtSocketError();
1897	AssertMsgFailed(("fNetworkEvents=%#x rc=%Rrc\n", fNetworkEvents, rtSocketError()));
1898	return rc;
1899	}
1900
1901
1902	/**
1903	* Checks for pending events.
1904	*
1905	* @returns Event mask or 0.
1906	* @param pThis The socket handle.
1907	* @param fEvents The desired events.
1908	*/
1909	static uint32_t rtSocketPollCheck(RTSOCKETINT *pThis, uint32_t fEvents)
1910	{
1911	int rc = VINF_SUCCESS;
1912	uint32_t fRetEvents = 0;
1913
1914	LogFlowFunc(("pThis=%#p fEvents=%#x\n", pThis, fEvents));
1915
1916	/* Make sure WSAEnumNetworkEvents returns what we want. */
1917	if ((pThis->fSubscribedEvts & fEvents) != fEvents)
1918	rc = rtSocketPollUpdateEvents(pThis, pThis->fSubscribedEvts \| fEvents);
1919
1920	/* Get the event mask, ASSUMES that WSAEnumNetworkEvents doesn't clear stuff. */
1921	WSANETWORKEVENTS NetEvts;
1922	RT_ZERO(NetEvts);
1923	if (WSAEnumNetworkEvents(pThis->hNative, pThis->hEvent, &NetEvts) == 0)
1924	{
1925	if ( (NetEvts.lNetworkEvents & FD_READ)
1926	&& (fEvents & RTPOLL_EVT_READ)
1927	&& NetEvts.iErrorCode[FD_READ_BIT] == 0)
1928	fRetEvents \|= RTPOLL_EVT_READ;
1929
1930	if ( (NetEvts.lNetworkEvents & FD_WRITE)
1931	&& (fEvents & RTPOLL_EVT_WRITE)
1932	&& NetEvts.iErrorCode[FD_WRITE_BIT] == 0)
1933	fRetEvents \|= RTPOLL_EVT_WRITE;
1934
1935	if (fEvents & RTPOLL_EVT_ERROR)
1936	{
1937	if (NetEvts.lNetworkEvents & FD_CLOSE)
1938	fRetEvents \|= RTPOLL_EVT_ERROR;
1939	else
1940	for (uint32_t i = 0; i < FD_MAX_EVENTS; i++)
1941	if ( (NetEvts.lNetworkEvents & (1L << i))
1942	&& NetEvts.iErrorCode[i] != 0)
1943	fRetEvents \|= RTPOLL_EVT_ERROR;
1944	}
1945	}
1946	else
1947	rc = rtSocketError();
1948
1949	/* Fall back on select if we hit an error above. */
1950	if (RT_FAILURE(rc))
1951	{
1952	/** @todo */
1953	}
1954
1955	LogFlowFunc(("fRetEvents=%#x\n", fRetEvents));
1956	return fRetEvents;
1957	}
1958
1959
1960	/**
1961	* Internal RTPoll helper that polls the socket handle and, if @a fNoWait is
1962	* clear, starts whatever actions we've got running during the poll call.
1963	*
1964	* @returns 0 if no pending events, actions initiated if @a fNoWait is clear.
1965	* Event mask (in @a fEvents) and no actions if the handle is ready
1966	* already.
1967	* UINT32_MAX (asserted) if the socket handle is busy in I/O or a
1968	* different poll set.
1969	*
1970	* @param hSocket The socket handle.
1971	* @param hPollSet The poll set handle (for access checks).
1972	* @param fEvents The events we're polling for.
1973	* @param fFinalEntry Set if this is the final entry for this handle
1974	* in this poll set. This can be used for dealing
1975	* with duplicate entries.
1976	* @param fNoWait Set if it's a zero-wait poll call. Clear if
1977	* we'll wait for an event to occur.
1978	*
1979	* @remarks There is a potential race wrt duplicate handles when @a fNoWait is
1980	* @c true, we don't currently care about that oddity...
1981	*/
1982	uint32_t rtSocketPollStart(RTSOCKET hSocket, RTPOLLSET hPollSet, uint32_t fEvents, bool fFinalEntry, bool fNoWait)
1983	{
1984	RTSOCKETINT *pThis = hSocket;
1985	AssertPtrReturn(pThis, UINT32_MAX);
1986	AssertReturn(pThis->u32Magic == RTSOCKET_MAGIC, UINT32_MAX);
1987	if (rtSocketTryLock(pThis))
1988	pThis->hPollSet = hPollSet;
1989	else
1990	{
1991	AssertReturn(pThis->hPollSet == hPollSet, UINT32_MAX);
1992	ASMAtomicIncU32(&pThis->cUsers);
1993	}
1994
1995	/* (rtSocketPollCheck will reset the event object). */
1996	uint32_t fRetEvents = pThis->fEventsSaved;
1997	pThis->fEventsSaved = 0; /* Reset */
1998	fRetEvents \|= rtSocketPollCheck(pThis, fEvents);
1999
2000	if ( !fRetEvents
2001	&& !fNoWait)
2002	{
2003	pThis->fPollEvts \|= fEvents;
2004	if ( fFinalEntry
2005	&& pThis->fSubscribedEvts != pThis->fPollEvts)
2006	{
2007	int rc = rtSocketPollUpdateEvents(pThis, pThis->fPollEvts);
2008	if (RT_FAILURE(rc))
2009	{
2010	pThis->fPollEvts = 0;
2011	fRetEvents = UINT32_MAX;
2012	}
2013	}
2014	}
2015
2016	if (fRetEvents \|\| fNoWait)
2017	{
2018	if (pThis->cUsers == 1)
2019	{
2020	rtSocketPollClearEventAndRestoreBlocking(pThis);
2021	pThis->hPollSet = NIL_RTPOLLSET;
2022	}
2023	ASMAtomicDecU32(&pThis->cUsers);
2024	}
2025
2026	return fRetEvents;
2027	}
2028
2029
2030	/**
2031	* Called after a WaitForMultipleObjects returned in order to check for pending
2032	* events and stop whatever actions that rtSocketPollStart() initiated.
2033	*
2034	* @returns Event mask or 0.
2035	*
2036	* @param hSocket The socket handle.
2037	* @param fEvents The events we're polling for.
2038	* @param fFinalEntry Set if this is the final entry for this handle
2039	* in this poll set. This can be used for dealing
2040	* with duplicate entries. Only keep in mind that
2041	* this method is called in reverse order, so the
2042	* first call will have this set (when the entire
2043	* set was processed).
2044	* @param fHarvestEvents Set if we should check for pending events.
2045	*/
2046	uint32_t rtSocketPollDone(RTSOCKET hSocket, uint32_t fEvents, bool fFinalEntry, bool fHarvestEvents)
2047	{
2048	RTSOCKETINT *pThis = hSocket;
2049	AssertPtrReturn(pThis, 0);
2050	AssertReturn(pThis->u32Magic == RTSOCKET_MAGIC, 0);
2051	Assert(pThis->cUsers > 0);
2052	Assert(pThis->hPollSet != NIL_RTPOLLSET);
2053
2054	/* Harvest events and clear the event mask for the next round of polling. */
2055	uint32_t fRetEvents = rtSocketPollCheck(pThis, fEvents);
2056	pThis->fPollEvts = 0;
2057
2058	/*
2059	* Save the write event if required.
2060	* It is only posted once and might get lost if the another source in the
2061	* pollset with a higher priority has pending events.
2062	*/
2063	if ( !fHarvestEvents
2064	&& fRetEvents)
2065	{
2066	pThis->fEventsSaved = fRetEvents;
2067	fRetEvents = 0;
2068	}
2069
2070	/* Make the socket blocking again and unlock the handle. */
2071	if (pThis->cUsers == 1)
2072	{
2073	rtSocketPollClearEventAndRestoreBlocking(pThis);
2074	pThis->hPollSet = NIL_RTPOLLSET;
2075	}
2076	ASMAtomicDecU32(&pThis->cUsers);
2077	return fRetEvents;
2078	}
2079
2080	#endif /* RT_OS_WINDOWS */

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source: vbox/trunk/src/VBox/Runtime/r3/socket.cpp@ 43176

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