socket.cpp@ 43206

Last change on this file since 43206 was 43206, checked in by vboxsync, 13 years ago
More cleanups.
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1	/* $Id: socket.cpp 43206 2012-09-05 13:31:05Z 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 both 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 pszHost, char pszResult, size_t *pcbResult, PRTNETADDRTYPE penmAddrType)
693	{
694	AssertPtrReturn(pszHost, VERR_INVALID_POINTER);
695	AssertPtrReturn(pcbResult, VERR_INVALID_POINTER);
696	AssertPtrNullReturn(penmAddrType, VERR_INVALID_POINTER);
697	AssertPtrNullReturn(pszResult, VERR_INVALID_POINTER);
698
699	#if defined(RT_OS_OS2) \|\| defined(RT_OS_WINDOWS) /** @todo dynamically resolve the APIs not present in NT4! */
700	return VERR_NOT_SUPPORTED;
701
702	#else
703	int rc;
704	if (*pcbResult < 16)
705	return VERR_NET_ADDRESS_NOT_AVAILABLE;
706
707	/* Setup the hint. */
708	struct addrinfo grHints;
709	RT_ZERO(grHints);
710	grHints.ai_socktype = 0;
711	grHints.ai_flags = 0;
712	grHints.ai_protocol = 0;
713	grHints.ai_family = AF_UNSPEC;
714	if (penmAddrType)
715	{
716	switch (*penmAddrType)
717	{
718	case RTNETADDRTYPE_INVALID:
719	/grHints.ai_family = AF_UNSPEC;/
720	break;
721	case RTNETADDRTYPE_IPV4:
722	grHints.ai_family = AF_INET;
723	break;
724	case RTNETADDRTYPE_IPV6:
725	grHints.ai_family = AF_INET6;
726	break;
727	default:
728	AssertFailedReturn(VERR_INVALID_PARAMETER);
729	}
730	}
731
732	# ifdef RT_OS_WINDOWS
733	/*
734	* Winsock2 init
735	*/
736	/** @todo someone should check if we really need 2, 2 here */
737	WORD wVersionRequested = MAKEWORD(2, 2);
738	WSADATA wsaData;
739	rc = WSAStartup(wVersionRequested, &wsaData);
740	if (wsaData.wVersion != wVersionRequested)
741	{
742	AssertMsgFailed(("Wrong winsock version\n"));
743	return VERR_NOT_SUPPORTED;
744	}
745	# endif
746
747	/** @todo r=bird: getaddrinfo and freeaddrinfo breaks the additions on NT4. */
748	struct addrinfo *pgrResults = NULL;
749	rc = getaddrinfo(pszHost, "", &grHints, &pgrResults);
750	if (rc != 0)
751	return VERR_NET_ADDRESS_NOT_AVAILABLE;
752
753	// return data
754	// on multiple matches return only the first one
755
756	if (!pgrResults)
757	return VERR_NET_ADDRESS_NOT_AVAILABLE;
758
759	struct addrinfo const *pgrResult = pgrResults->ai_next;
760	if (!pgrResult)
761	{
762	freeaddrinfo(pgrResults);
763	return VERR_NET_ADDRESS_NOT_AVAILABLE;
764	}
765
766	uint8_t const *pbDummy;
767	RTNETADDRTYPE enmAddrType = RTNETADDRTYPE_INVALID;
768	size_t cchIpAddress;
769	char szIpAddress[48];
770	if (pgrResult->ai_family == AF_INET)
771	{
772	struct sockaddr_in const pgrSa = (struct sockaddr_in const )pgrResult->ai_addr;
773	pbDummy = (uint8_t const *)&pgrSa->sin_addr;
774	cchIpAddress = RTStrPrintf(szIpAddress, sizeof(szIpAddress), "%u.%u.%u.%u",
775	pbDummy[0], pbDummy[1], pbDummy[2], pbDummy[3]);
776	Assert(cchIpAddress >= 7 && cchIpAddress < sizeof(szIpAddress) - 1);
777	enmAddrType = RTNETADDRTYPE_IPV4;
778	rc = VINF_SUCCESS;
779	}
780	else if (pgrResult->ai_family == AF_INET6)
781	{
782	struct sockaddr_in6 const pgrSa6 = (struct sockaddr_in6 const )pgrResult->ai_addr;
783	pbDummy = (uint8_t const *) &pgrSa6->sin6_addr;
784	char szTmp[32+1];
785	size_t cchTmp = RTStrPrintf(szTmp, sizeof(szTmp),
786	"%02x%02x%02x%02x"
787	"%02x%02x%02x%02x"
788	"%02x%02x%02x%02x"
789	"%02x%02x%02x%02x",
790	pbDummy[0], pbDummy[1], pbDummy[2], pbDummy[3],
791	pbDummy[4], pbDummy[5], pbDummy[6], pbDummy[7],
792	pbDummy[8], pbDummy[9], pbDummy[10], pbDummy[11],
793	pbDummy[12], pbDummy[13], pbDummy[14], pbDummy[15]);
794	Assert(cchTmp == 32);
795	rc = rtStrToIpAddr6Str(szTmp, szIpAddress, sizeof(szIpAddress), NULL, 0, true);
796	if (RT_SUCCESS(rc))
797	cchIpAddress = strlen(szIpAddress);
798	else
799	{
800	szIpAddress[0] = '\0';
801	cchIpAddress = 0;
802	}
803	enmAddrType = RTNETADDRTYPE_IPV6;
804	}
805	else
806	{
807	rc = VERR_NET_ADDRESS_NOT_AVAILABLE;
808	szIpAddress[0] = '\0';
809	cchIpAddress = 0;
810	}
811	freeaddrinfo(pgrResults);
812
813	/*
814	* Copy out the result.
815	*/
816	size_t const cbResult = *pcbResult;
817	*pcbResult = cchIpAddress + 1;
818	if (cchIpAddress < cbResult)
819	memcpy(pszResult, szIpAddress, cchIpAddress + 1);
820	else
821	{
822	RT_BZERO(pszResult, cbResult);
823	if (RT_SUCCESS(rc))
824	rc = VERR_BUFFER_OVERFLOW;
825	}
826	if (penmAddrType && RT_SUCCESS(rc))
827	*penmAddrType = enmAddrType;
828	return rc;
829	#endif /* !RT_OS_OS2 */
830	}
831
832
833	RTDECL(int) RTSocketRead(RTSOCKET hSocket, void pvBuffer, size_t cbBuffer, size_t pcbRead)
834	{
835	/*
836	* Validate input.
837	*/
838	RTSOCKETINT *pThis = hSocket;
839	AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
840	AssertReturn(pThis->u32Magic == RTSOCKET_MAGIC, VERR_INVALID_HANDLE);
841	AssertReturn(cbBuffer > 0, VERR_INVALID_PARAMETER);
842	AssertPtr(pvBuffer);
843	AssertReturn(rtSocketTryLock(pThis), VERR_CONCURRENT_ACCESS);
844
845	int rc = rtSocketSwitchBlockingMode(pThis, true /* fBlocking */);
846	if (RT_FAILURE(rc))
847	return rc;
848
849	/*
850	* Read loop.
851	* If pcbRead is NULL we have to fill the entire buffer!
852	*/
853	size_t cbRead = 0;
854	size_t cbToRead = cbBuffer;
855	for (;;)
856	{
857	rtSocketErrorReset();
858	#ifdef RT_OS_WINDOWS
859	int cbNow = cbToRead >= INT_MAX/2 ? INT_MAX/2 : (int)cbToRead;
860	#else
861	size_t cbNow = cbToRead;
862	#endif
863	ssize_t cbBytesRead = recv(pThis->hNative, (char *)pvBuffer + cbRead, cbNow, MSG_NOSIGNAL);
864	if (cbBytesRead <= 0)
865	{
866	rc = rtSocketError();
867	Assert(RT_FAILURE_NP(rc) \|\| cbBytesRead == 0);
868	if (RT_SUCCESS_NP(rc))
869	{
870	if (!pcbRead)
871	rc = VERR_NET_SHUTDOWN;
872	else
873	{
874	*pcbRead = 0;
875	rc = VINF_SUCCESS;
876	}
877	}
878	break;
879	}
880	if (pcbRead)
881	{
882	/* return partial data */
883	*pcbRead = cbBytesRead;
884	break;
885	}
886
887	/* read more? */
888	cbRead += cbBytesRead;
889	if (cbRead == cbBuffer)
890	break;
891
892	/* next */
893	cbToRead = cbBuffer - cbRead;
894	}
895
896	rtSocketUnlock(pThis);
897	return rc;
898	}
899
900
901	RTDECL(int) RTSocketReadFrom(RTSOCKET hSocket, void pvBuffer, size_t cbBuffer, size_t pcbRead, PRTNETADDR pSrcAddr)
902	{
903	/*
904	* Validate input.
905	*/
906	RTSOCKETINT *pThis = hSocket;
907	AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
908	AssertReturn(pThis->u32Magic == RTSOCKET_MAGIC, VERR_INVALID_HANDLE);
909	AssertReturn(cbBuffer > 0, VERR_INVALID_PARAMETER);
910	AssertPtr(pvBuffer);
911	AssertPtr(pcbRead);
912	AssertReturn(rtSocketTryLock(pThis), VERR_CONCURRENT_ACCESS);
913
914	int rc = rtSocketSwitchBlockingMode(pThis, true /* fBlocking */);
915	if (RT_FAILURE(rc))
916	return rc;
917
918	/*
919	* Read data.
920	*/
921	size_t cbRead = 0;
922	size_t cbToRead = cbBuffer;
923	rtSocketErrorReset();
924	RTSOCKADDRUNION u;
925	#ifdef RT_OS_WINDOWS
926	int cbNow = cbToRead >= INT_MAX/2 ? INT_MAX/2 : (int)cbToRead;
927	int cbAddr = sizeof(u);
928	#else
929	size_t cbNow = cbToRead;
930	socklen_t cbAddr = sizeof(u);
931	#endif
932	ssize_t cbBytesRead = recvfrom(pThis->hNative, (char *)pvBuffer + cbRead, cbNow, MSG_NOSIGNAL, &u.Addr, &cbAddr);
933	if (cbBytesRead <= 0)
934	{
935	rc = rtSocketError();
936	Assert(RT_FAILURE_NP(rc) \|\| cbBytesRead == 0);
937	if (RT_SUCCESS_NP(rc))
938	{
939	*pcbRead = 0;
940	rc = VINF_SUCCESS;
941	}
942	}
943	else
944	{
945	if (pSrcAddr)
946	rc = rtSocketNetAddrFromAddr(&u, cbAddr, pSrcAddr);
947	*pcbRead = cbBytesRead;
948	}
949
950	rtSocketUnlock(pThis);
951	return rc;
952	}
953
954
955	RTDECL(int) RTSocketWrite(RTSOCKET hSocket, const void *pvBuffer, size_t cbBuffer)
956	{
957	/*
958	* Validate input.
959	*/
960	RTSOCKETINT *pThis = hSocket;
961	AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
962	AssertReturn(pThis->u32Magic == RTSOCKET_MAGIC, VERR_INVALID_HANDLE);
963	AssertReturn(rtSocketTryLock(pThis), VERR_CONCURRENT_ACCESS);
964
965	int rc = rtSocketSwitchBlockingMode(pThis, true /* fBlocking */);
966	if (RT_FAILURE(rc))
967	return rc;
968
969	/*
970	* Try write all at once.
971	*/
972	#ifdef RT_OS_WINDOWS
973	int cbNow = cbBuffer >= INT_MAX / 2 ? INT_MAX / 2 : (int)cbBuffer;
974	#else
975	size_t cbNow = cbBuffer >= SSIZE_MAX ? SSIZE_MAX : cbBuffer;
976	#endif
977	ssize_t cbWritten = send(pThis->hNative, (const char *)pvBuffer, cbNow, MSG_NOSIGNAL);
978	if (RT_LIKELY((size_t)cbWritten == cbBuffer && cbWritten >= 0))
979	rc = VINF_SUCCESS;
980	else if (cbWritten < 0)
981	rc = rtSocketError();
982	else
983	{
984	/*
985	* Unfinished business, write the remainder of the request. Must ignore
986	* VERR_INTERRUPTED here if we've managed to send something.
987	*/
988	size_t cbSentSoFar = 0;
989	for (;;)
990	{
991	/* advance */
992	cbBuffer -= (size_t)cbWritten;
993	if (!cbBuffer)
994	break;
995	cbSentSoFar += (size_t)cbWritten;
996	pvBuffer = (char const *)pvBuffer + cbWritten;
997
998	/* send */
999	#ifdef RT_OS_WINDOWS
1000	cbNow = cbBuffer >= INT_MAX / 2 ? INT_MAX / 2 : (int)cbBuffer;
1001	#else
1002	cbNow = cbBuffer >= SSIZE_MAX ? SSIZE_MAX : cbBuffer;
1003	#endif
1004	cbWritten = send(pThis->hNative, (const char *)pvBuffer, cbNow, MSG_NOSIGNAL);
1005	if (cbWritten >= 0)
1006	AssertMsg(cbBuffer >= (size_t)cbWritten, ("Wrote more than we requested!!! cbWritten=%zu cbBuffer=%zu rtSocketError()=%d\n",
1007	cbWritten, cbBuffer, rtSocketError()));
1008	else
1009	{
1010	rc = rtSocketError();
1011	if (rc != VERR_INTERNAL_ERROR \|\| cbSentSoFar == 0)
1012	break;
1013	cbWritten = 0;
1014	rc = VINF_SUCCESS;
1015	}
1016	}
1017	}
1018
1019	rtSocketUnlock(pThis);
1020	return rc;
1021	}
1022
1023
1024	RTDECL(int) RTSocketWriteTo(RTSOCKET hSocket, const void *pvBuffer, size_t cbBuffer, PCRTNETADDR pAddr)
1025	{
1026	/*
1027	* Validate input.
1028	*/
1029	RTSOCKETINT *pThis = hSocket;
1030	AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
1031	AssertReturn(pThis->u32Magic == RTSOCKET_MAGIC, VERR_INVALID_HANDLE);
1032
1033	/* no locking since UDP reads may be done concurrently to writes, and
1034	* this is the normal use case of this code. */
1035
1036	int rc = rtSocketSwitchBlockingMode(pThis, true /* fBlocking */);
1037	if (RT_FAILURE(rc))
1038	return rc;
1039
1040	/* Figure out destination address. */
1041	struct sockaddr *pSA = NULL;
1042	#ifdef RT_OS_WINDOWS
1043	int cbSA = 0;
1044	#else
1045	socklen_t cbSA = 0;
1046	#endif
1047	RTSOCKADDRUNION u;
1048	if (pAddr)
1049	{
1050	rc = rtSocketAddrFromNetAddr(pAddr, &u, sizeof(u), NULL);
1051	if (RT_FAILURE(rc))
1052	return rc;
1053	pSA = &u.Addr;
1054	cbSA = sizeof(u);
1055	}
1056
1057	/*
1058	* Must write all at once, otherwise it is a failure.
1059	*/
1060	#ifdef RT_OS_WINDOWS
1061	int cbNow = cbBuffer >= INT_MAX / 2 ? INT_MAX / 2 : (int)cbBuffer;
1062	#else
1063	size_t cbNow = cbBuffer >= SSIZE_MAX ? SSIZE_MAX : cbBuffer;
1064	#endif
1065	ssize_t cbWritten = sendto(pThis->hNative, (const char *)pvBuffer, cbNow, MSG_NOSIGNAL, pSA, cbSA);
1066	if (RT_LIKELY((size_t)cbWritten == cbBuffer && cbWritten >= 0))
1067	rc = VINF_SUCCESS;
1068	else if (cbWritten < 0)
1069	rc = rtSocketError();
1070	else
1071	rc = VERR_TOO_MUCH_DATA;
1072
1073	rtSocketUnlock(pThis);
1074	return rc;
1075	}
1076
1077
1078	RTDECL(int) RTSocketSgWrite(RTSOCKET hSocket, PCRTSGBUF pSgBuf)
1079	{
1080	/*
1081	* Validate input.
1082	*/
1083	RTSOCKETINT *pThis = hSocket;
1084	AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
1085	AssertReturn(pThis->u32Magic == RTSOCKET_MAGIC, VERR_INVALID_HANDLE);
1086	AssertPtrReturn(pSgBuf, VERR_INVALID_PARAMETER);
1087	AssertReturn(pSgBuf->cSegs > 0, VERR_INVALID_PARAMETER);
1088	AssertReturn(rtSocketTryLock(pThis), VERR_CONCURRENT_ACCESS);
1089
1090	int rc = rtSocketSwitchBlockingMode(pThis, true /* fBlocking */);
1091	if (RT_FAILURE(rc))
1092	return rc;
1093
1094	/*
1095	* Construct message descriptor (translate pSgBuf) and send it.
1096	*/
1097	rc = VERR_NO_TMP_MEMORY;
1098	#ifdef RT_OS_WINDOWS
1099	AssertCompileSize(WSABUF, sizeof(RTSGSEG));
1100	AssertCompileMemberSize(WSABUF, buf, RT_SIZEOFMEMB(RTSGSEG, pvSeg));
1101
1102	LPWSABUF paMsg = (LPWSABUF)RTMemTmpAllocZ(pSgBuf->cSegs * sizeof(WSABUF));
1103	if (paMsg)
1104	{
1105	for (unsigned i = 0; i < pSgBuf->cSegs; i++)
1106	{
1107	paMsg[i].buf = (char *)pSgBuf->paSegs[i].pvSeg;
1108	paMsg[i].len = (u_long)pSgBuf->paSegs[i].cbSeg;
1109	}
1110
1111	DWORD dwSent;
1112	int hrc = WSASend(pThis->hNative, paMsg, pSgBuf->cSegs, &dwSent,
1113	MSG_NOSIGNAL, NULL, NULL);
1114	if (!hrc)
1115	rc = VINF_SUCCESS;
1116	/** @todo check for incomplete writes */
1117	else
1118	rc = rtSocketError();
1119
1120	RTMemTmpFree(paMsg);
1121	}
1122
1123	#else /* !RT_OS_WINDOWS */
1124	AssertCompileSize(struct iovec, sizeof(RTSGSEG));
1125	AssertCompileMemberSize(struct iovec, iov_base, RT_SIZEOFMEMB(RTSGSEG, pvSeg));
1126	AssertCompileMemberSize(struct iovec, iov_len, RT_SIZEOFMEMB(RTSGSEG, cbSeg));
1127
1128	struct iovec paMsg = (struct iovec )RTMemTmpAllocZ(pSgBuf->cSegs * sizeof(struct iovec));
1129	if (paMsg)
1130	{
1131	for (unsigned i = 0; i < pSgBuf->cSegs; i++)
1132	{
1133	paMsg[i].iov_base = pSgBuf->paSegs[i].pvSeg;
1134	paMsg[i].iov_len = pSgBuf->paSegs[i].cbSeg;
1135	}
1136
1137	struct msghdr msgHdr;
1138	RT_ZERO(msgHdr);
1139	msgHdr.msg_iov = paMsg;
1140	msgHdr.msg_iovlen = pSgBuf->cSegs;
1141	ssize_t cbWritten = sendmsg(pThis->hNative, &msgHdr, MSG_NOSIGNAL);
1142	if (RT_LIKELY(cbWritten >= 0))
1143	rc = VINF_SUCCESS;
1144	/** @todo check for incomplete writes */
1145	else
1146	rc = rtSocketError();
1147
1148	RTMemTmpFree(paMsg);
1149	}
1150	#endif /* !RT_OS_WINDOWS */
1151
1152	rtSocketUnlock(pThis);
1153	return rc;
1154	}
1155
1156
1157	RTDECL(int) RTSocketSgWriteL(RTSOCKET hSocket, size_t cSegs, ...)
1158	{
1159	va_list va;
1160	va_start(va, cSegs);
1161	int rc = RTSocketSgWriteLV(hSocket, cSegs, va);
1162	va_end(va);
1163	return rc;
1164	}
1165
1166
1167	RTDECL(int) RTSocketSgWriteLV(RTSOCKET hSocket, size_t cSegs, va_list va)
1168	{
1169	/*
1170	* Set up a S/G segment array + buffer on the stack and pass it
1171	* on to RTSocketSgWrite.
1172	*/
1173	Assert(cSegs <= 16);
1174	PRTSGSEG paSegs = (PRTSGSEG)alloca(cSegs * sizeof(RTSGSEG));
1175	AssertReturn(paSegs, VERR_NO_TMP_MEMORY);
1176	for (size_t i = 0; i < cSegs; i++)
1177	{
1178	paSegs[i].pvSeg = va_arg(va, void *);
1179	paSegs[i].cbSeg = va_arg(va, size_t);
1180	}
1181
1182	RTSGBUF SgBuf;
1183	RTSgBufInit(&SgBuf, paSegs, cSegs);
1184	return RTSocketSgWrite(hSocket, &SgBuf);
1185	}
1186
1187
1188	RTDECL(int) RTSocketReadNB(RTSOCKET hSocket, void pvBuffer, size_t cbBuffer, size_t pcbRead)
1189	{
1190	/*
1191	* Validate input.
1192	*/
1193	RTSOCKETINT *pThis = hSocket;
1194	AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
1195	AssertReturn(pThis->u32Magic == RTSOCKET_MAGIC, VERR_INVALID_HANDLE);
1196	AssertReturn(cbBuffer > 0, VERR_INVALID_PARAMETER);
1197	AssertPtr(pvBuffer);
1198	AssertPtrReturn(pcbRead, VERR_INVALID_PARAMETER);
1199	AssertReturn(rtSocketTryLock(pThis), VERR_CONCURRENT_ACCESS);
1200
1201	int rc = rtSocketSwitchBlockingMode(pThis, false /* fBlocking */);
1202	if (RT_FAILURE(rc))
1203	return rc;
1204
1205	rtSocketErrorReset();
1206	#ifdef RT_OS_WINDOWS
1207	int cbNow = cbBuffer >= INT_MAX/2 ? INT_MAX/2 : (int)cbBuffer;
1208
1209	int cbRead = recv(pThis->hNative, (char *)pvBuffer, cbNow, MSG_NOSIGNAL);
1210	if (cbRead >= 0)
1211	{
1212	*pcbRead = cbRead;
1213	rc = VINF_SUCCESS;
1214	}
1215	else
1216	rc = rtSocketError();
1217
1218	if (rc == VERR_TRY_AGAIN)
1219	rc = VINF_TRY_AGAIN;
1220	#else
1221	ssize_t cbRead = recv(pThis->hNative, pvBuffer, cbBuffer, MSG_NOSIGNAL);
1222	if (cbRead >= 0)
1223	*pcbRead = cbRead;
1224	else if (errno == EAGAIN)
1225	{
1226	*pcbRead = 0;
1227	rc = VINF_TRY_AGAIN;
1228	}
1229	else
1230	rc = rtSocketError();
1231	#endif
1232
1233	rtSocketUnlock(pThis);
1234	return rc;
1235	}
1236
1237
1238	RTDECL(int) RTSocketWriteNB(RTSOCKET hSocket, const void pvBuffer, size_t cbBuffer, size_t pcbWritten)
1239	{
1240	/*
1241	* Validate input.
1242	*/
1243	RTSOCKETINT *pThis = hSocket;
1244	AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
1245	AssertReturn(pThis->u32Magic == RTSOCKET_MAGIC, VERR_INVALID_HANDLE);
1246	AssertPtrReturn(pcbWritten, VERR_INVALID_PARAMETER);
1247	AssertReturn(rtSocketTryLock(pThis), VERR_CONCURRENT_ACCESS);
1248
1249	int rc = rtSocketSwitchBlockingMode(pThis, false /* fBlocking */);
1250	if (RT_FAILURE(rc))
1251	return rc;
1252
1253	rtSocketErrorReset();
1254	#ifdef RT_OS_WINDOWS
1255	int cbNow = RT_MIN((int)cbBuffer, INT_MAX/2);
1256
1257	int cbWritten = send(pThis->hNative, (const char *)pvBuffer, cbNow, MSG_NOSIGNAL);
1258
1259	if (cbWritten >= 0)
1260	{
1261	*pcbWritten = cbWritten;
1262	rc = VINF_SUCCESS;
1263	}
1264	else
1265	rc = rtSocketError();
1266
1267	if (rc == VERR_TRY_AGAIN)
1268	rc = VINF_TRY_AGAIN;
1269	#else
1270	ssize_t cbWritten = send(pThis->hNative, pvBuffer, cbBuffer, MSG_NOSIGNAL);
1271	if (cbWritten >= 0)
1272	*pcbWritten = cbWritten;
1273	else if (errno == EAGAIN)
1274	{
1275	*pcbWritten = 0;
1276	rc = VINF_TRY_AGAIN;
1277	}
1278	else
1279	rc = rtSocketError();
1280	#endif
1281
1282	rtSocketUnlock(pThis);
1283	return rc;
1284	}
1285
1286
1287	RTDECL(int) RTSocketSgWriteNB(RTSOCKET hSocket, PCRTSGBUF pSgBuf, size_t *pcbWritten)
1288	{
1289	/*
1290	* Validate input.
1291	*/
1292	RTSOCKETINT *pThis = hSocket;
1293	AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
1294	AssertReturn(pThis->u32Magic == RTSOCKET_MAGIC, VERR_INVALID_HANDLE);
1295	AssertPtrReturn(pSgBuf, VERR_INVALID_PARAMETER);
1296	AssertPtrReturn(pcbWritten, VERR_INVALID_PARAMETER);
1297	AssertReturn(pSgBuf->cSegs > 0, VERR_INVALID_PARAMETER);
1298	AssertReturn(rtSocketTryLock(pThis), VERR_CONCURRENT_ACCESS);
1299
1300	int rc = rtSocketSwitchBlockingMode(pThis, false /* fBlocking */);
1301	if (RT_FAILURE(rc))
1302	return rc;
1303
1304	unsigned cSegsToSend = 0;
1305	rc = VERR_NO_TMP_MEMORY;
1306	#ifdef RT_OS_WINDOWS
1307	LPWSABUF paMsg = NULL;
1308
1309	RTSgBufMapToNative(paMsg, pSgBuf, WSABUF, buf, char *, len, u_long, cSegsToSend);
1310	if (paMsg)
1311	{
1312	DWORD dwSent = 0;
1313	int hrc = WSASend(pThis->hNative, paMsg, cSegsToSend, &dwSent,
1314	MSG_NOSIGNAL, NULL, NULL);
1315	if (!hrc)
1316	rc = VINF_SUCCESS;
1317	else
1318	rc = rtSocketError();
1319
1320	*pcbWritten = dwSent;
1321
1322	RTMemTmpFree(paMsg);
1323	}
1324
1325	#else /* !RT_OS_WINDOWS */
1326	struct iovec *paMsg = NULL;
1327
1328	RTSgBufMapToNative(paMsg, pSgBuf, struct iovec, iov_base, void *, iov_len, size_t, cSegsToSend);
1329	if (paMsg)
1330	{
1331	struct msghdr msgHdr;
1332	RT_ZERO(msgHdr);
1333	msgHdr.msg_iov = paMsg;
1334	msgHdr.msg_iovlen = cSegsToSend;
1335	ssize_t cbWritten = sendmsg(pThis->hNative, &msgHdr, MSG_NOSIGNAL);
1336	if (RT_LIKELY(cbWritten >= 0))
1337	{
1338	rc = VINF_SUCCESS;
1339	*pcbWritten = cbWritten;
1340	}
1341	else
1342	rc = rtSocketError();
1343
1344	RTMemTmpFree(paMsg);
1345	}
1346	#endif /* !RT_OS_WINDOWS */
1347
1348	rtSocketUnlock(pThis);
1349	return rc;
1350	}
1351
1352
1353	RTDECL(int) RTSocketSgWriteLNB(RTSOCKET hSocket, size_t cSegs, size_t *pcbWritten, ...)
1354	{
1355	va_list va;
1356	va_start(va, pcbWritten);
1357	int rc = RTSocketSgWriteLVNB(hSocket, cSegs, pcbWritten, va);
1358	va_end(va);
1359	return rc;
1360	}
1361
1362
1363	RTDECL(int) RTSocketSgWriteLVNB(RTSOCKET hSocket, size_t cSegs, size_t *pcbWritten, va_list va)
1364	{
1365	/*
1366	* Set up a S/G segment array + buffer on the stack and pass it
1367	* on to RTSocketSgWrite.
1368	*/
1369	Assert(cSegs <= 16);
1370	PRTSGSEG paSegs = (PRTSGSEG)alloca(cSegs * sizeof(RTSGSEG));
1371	AssertReturn(paSegs, VERR_NO_TMP_MEMORY);
1372	for (size_t i = 0; i < cSegs; i++)
1373	{
1374	paSegs[i].pvSeg = va_arg(va, void *);
1375	paSegs[i].cbSeg = va_arg(va, size_t);
1376	}
1377
1378	RTSGBUF SgBuf;
1379	RTSgBufInit(&SgBuf, paSegs, cSegs);
1380	return RTSocketSgWriteNB(hSocket, &SgBuf, pcbWritten);
1381	}
1382
1383
1384	RTDECL(int) RTSocketSelectOne(RTSOCKET hSocket, RTMSINTERVAL cMillies)
1385	{
1386	/*
1387	* Validate input.
1388	*/
1389	RTSOCKETINT *pThis = hSocket;
1390	AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
1391	AssertReturn(pThis->u32Magic == RTSOCKET_MAGIC, VERR_INVALID_HANDLE);
1392	AssertReturn(RTMemPoolRefCount(pThis) >= (pThis->cUsers ? 2U : 1U), VERR_CALLER_NO_REFERENCE);
1393	int const fdMax = (int)pThis->hNative + 1;
1394	AssertReturn(fdMax - 1 == pThis->hNative, VERR_INTERNAL_ERROR_5);
1395
1396	/*
1397	* Set up the file descriptor sets and do the select.
1398	*/
1399	fd_set fdsetR;
1400	FD_ZERO(&fdsetR);
1401	FD_SET(pThis->hNative, &fdsetR);
1402
1403	fd_set fdsetE = fdsetR;
1404
1405	int rc;
1406	if (cMillies == RT_INDEFINITE_WAIT)
1407	rc = select(fdMax, &fdsetR, NULL, &fdsetE, NULL);
1408	else
1409	{
1410	struct timeval timeout;
1411	timeout.tv_sec = cMillies / 1000;
1412	timeout.tv_usec = (cMillies % 1000) * 1000;
1413	rc = select(fdMax, &fdsetR, NULL, &fdsetE, &timeout);
1414	}
1415	if (rc > 0)
1416	rc = VINF_SUCCESS;
1417	else if (rc == 0)
1418	rc = VERR_TIMEOUT;
1419	else
1420	rc = rtSocketError();
1421
1422	return rc;
1423	}
1424
1425
1426	RTDECL(int) RTSocketSelectOneEx(RTSOCKET hSocket, uint32_t fEvents, uint32_t *pfEvents,
1427	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	AssertPtrReturn(pfEvents, VERR_INVALID_PARAMETER);
1436	AssertReturn(!(fEvents & ~RTSOCKET_EVT_VALID_MASK), VERR_INVALID_PARAMETER);
1437	AssertReturn(RTMemPoolRefCount(pThis) >= (pThis->cUsers ? 2U : 1U), VERR_CALLER_NO_REFERENCE);
1438	int const fdMax = (int)pThis->hNative + 1;
1439	AssertReturn(fdMax - 1 == pThis->hNative, VERR_INTERNAL_ERROR_5);
1440
1441	*pfEvents = 0;
1442
1443	/*
1444	* Set up the file descriptor sets and do the select.
1445	*/
1446	fd_set fdsetR;
1447	fd_set fdsetW;
1448	fd_set fdsetE;
1449	FD_ZERO(&fdsetR);
1450	FD_ZERO(&fdsetW);
1451	FD_ZERO(&fdsetE);
1452
1453	if (fEvents & RTSOCKET_EVT_READ)
1454	FD_SET(pThis->hNative, &fdsetR);
1455	if (fEvents & RTSOCKET_EVT_WRITE)
1456	FD_SET(pThis->hNative, &fdsetW);
1457	if (fEvents & RTSOCKET_EVT_ERROR)
1458	FD_SET(pThis->hNative, &fdsetE);
1459
1460	int rc;
1461	if (cMillies == RT_INDEFINITE_WAIT)
1462	rc = select(fdMax, &fdsetR, &fdsetW, &fdsetE, NULL);
1463	else
1464	{
1465	struct timeval timeout;
1466	timeout.tv_sec = cMillies / 1000;
1467	timeout.tv_usec = (cMillies % 1000) * 1000;
1468	rc = select(fdMax, &fdsetR, &fdsetW, &fdsetE, &timeout);
1469	}
1470	if (rc > 0)
1471	{
1472	if (FD_ISSET(pThis->hNative, &fdsetR))
1473	*pfEvents \|= RTSOCKET_EVT_READ;
1474	if (FD_ISSET(pThis->hNative, &fdsetW))
1475	*pfEvents \|= RTSOCKET_EVT_WRITE;
1476	if (FD_ISSET(pThis->hNative, &fdsetE))
1477	*pfEvents \|= RTSOCKET_EVT_ERROR;
1478
1479	rc = VINF_SUCCESS;
1480	}
1481	else if (rc == 0)
1482	rc = VERR_TIMEOUT;
1483	else
1484	rc = rtSocketError();
1485
1486	return rc;
1487	}
1488
1489
1490	RTDECL(int) RTSocketShutdown(RTSOCKET hSocket, bool fRead, bool fWrite)
1491	{
1492	/*
1493	* Validate input, don't lock it because we might want to interrupt a call
1494	* active on a different thread.
1495	*/
1496	RTSOCKETINT *pThis = hSocket;
1497	AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
1498	AssertReturn(pThis->u32Magic == RTSOCKET_MAGIC, VERR_INVALID_HANDLE);
1499	AssertReturn(RTMemPoolRefCount(pThis) >= (pThis->cUsers ? 2U : 1U), VERR_CALLER_NO_REFERENCE);
1500	AssertReturn(fRead \|\| fWrite, VERR_INVALID_PARAMETER);
1501
1502	/*
1503	* Do the job.
1504	*/
1505	int rc = VINF_SUCCESS;
1506	int fHow;
1507	if (fRead && fWrite)
1508	fHow = SHUT_RDWR;
1509	else if (fRead)
1510	fHow = SHUT_RD;
1511	else
1512	fHow = SHUT_WR;
1513	if (shutdown(pThis->hNative, fHow) == -1)
1514	rc = rtSocketError();
1515
1516	return rc;
1517	}
1518
1519
1520	RTDECL(int) RTSocketGetLocalAddress(RTSOCKET hSocket, PRTNETADDR pAddr)
1521	{
1522	/*
1523	* Validate input.
1524	*/
1525	RTSOCKETINT *pThis = hSocket;
1526	AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
1527	AssertReturn(pThis->u32Magic == RTSOCKET_MAGIC, VERR_INVALID_HANDLE);
1528	AssertReturn(RTMemPoolRefCount(pThis) >= (pThis->cUsers ? 2U : 1U), VERR_CALLER_NO_REFERENCE);
1529
1530	/*
1531	* Get the address and convert it.
1532	*/
1533	int rc;
1534	RTSOCKADDRUNION u;
1535	#ifdef RT_OS_WINDOWS
1536	int cbAddr = sizeof(u);
1537	#else
1538	socklen_t cbAddr = sizeof(u);
1539	#endif
1540	RT_ZERO(u);
1541	if (getsockname(pThis->hNative, &u.Addr, &cbAddr) == 0)
1542	rc = rtSocketNetAddrFromAddr(&u, cbAddr, pAddr);
1543	else
1544	rc = rtSocketError();
1545
1546	return rc;
1547	}
1548
1549
1550	RTDECL(int) RTSocketGetPeerAddress(RTSOCKET hSocket, PRTNETADDR pAddr)
1551	{
1552	/*
1553	* Validate input.
1554	*/
1555	RTSOCKETINT *pThis = hSocket;
1556	AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
1557	AssertReturn(pThis->u32Magic == RTSOCKET_MAGIC, VERR_INVALID_HANDLE);
1558	AssertReturn(RTMemPoolRefCount(pThis) >= (pThis->cUsers ? 2U : 1U), VERR_CALLER_NO_REFERENCE);
1559
1560	/*
1561	* Get the address and convert it.
1562	*/
1563	int rc;
1564	RTSOCKADDRUNION u;
1565	#ifdef RT_OS_WINDOWS
1566	int cbAddr = sizeof(u);
1567	#else
1568	socklen_t cbAddr = sizeof(u);
1569	#endif
1570	RT_ZERO(u);
1571	if (getpeername(pThis->hNative, &u.Addr, &cbAddr) == 0)
1572	rc = rtSocketNetAddrFromAddr(&u, cbAddr, pAddr);
1573	else
1574	rc = rtSocketError();
1575
1576	return rc;
1577	}
1578
1579
1580
1581	/**
1582	* Wrapper around bind.
1583	*
1584	* @returns IPRT status code.
1585	* @param hSocket The socket handle.
1586	* @param pAddr The address to bind to.
1587	*/
1588	int rtSocketBind(RTSOCKET hSocket, PCRTNETADDR pAddr)
1589	{
1590	/*
1591	* Validate input.
1592	*/
1593	RTSOCKETINT *pThis = hSocket;
1594	AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
1595	AssertReturn(pThis->u32Magic == RTSOCKET_MAGIC, VERR_INVALID_HANDLE);
1596	AssertReturn(rtSocketTryLock(pThis), VERR_CONCURRENT_ACCESS);
1597
1598	RTSOCKADDRUNION u;
1599	int cbAddr;
1600	int rc = rtSocketAddrFromNetAddr(pAddr, &u, sizeof(u), &cbAddr);
1601	if (RT_SUCCESS(rc))
1602	{
1603	if (bind(pThis->hNative, &u.Addr, cbAddr) != 0)
1604	rc = rtSocketError();
1605	}
1606
1607	rtSocketUnlock(pThis);
1608	return rc;
1609	}
1610
1611
1612	/**
1613	* Wrapper around listen.
1614	*
1615	* @returns IPRT status code.
1616	* @param hSocket The socket handle.
1617	* @param cMaxPending The max number of pending connections.
1618	*/
1619	int rtSocketListen(RTSOCKET hSocket, int cMaxPending)
1620	{
1621	/*
1622	* Validate input.
1623	*/
1624	RTSOCKETINT *pThis = hSocket;
1625	AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
1626	AssertReturn(pThis->u32Magic == RTSOCKET_MAGIC, VERR_INVALID_HANDLE);
1627	AssertReturn(rtSocketTryLock(pThis), VERR_CONCURRENT_ACCESS);
1628
1629	int rc = VINF_SUCCESS;
1630	if (listen(pThis->hNative, cMaxPending) != 0)
1631	rc = rtSocketError();
1632
1633	rtSocketUnlock(pThis);
1634	return rc;
1635	}
1636
1637
1638	/**
1639	* Wrapper around accept.
1640	*
1641	* @returns IPRT status code.
1642	* @param hSocket The socket handle.
1643	* @param phClient Where to return the client socket handle on
1644	* success.
1645	* @param pAddr Where to return the client address.
1646	* @param pcbAddr On input this gives the size buffer size of what
1647	* @a pAddr point to. On return this contains the
1648	* size of what's stored at @a pAddr.
1649	*/
1650	int rtSocketAccept(RTSOCKET hSocket, PRTSOCKET phClient, struct sockaddr pAddr, size_t pcbAddr)
1651	{
1652	/*
1653	* Validate input.
1654	* Only lock the socket temporarily while we get the native handle, so that
1655	* we can safely shutdown and destroy the socket from a different thread.
1656	*/
1657	RTSOCKETINT *pThis = hSocket;
1658	AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
1659	AssertReturn(pThis->u32Magic == RTSOCKET_MAGIC, VERR_INVALID_HANDLE);
1660	AssertReturn(rtSocketTryLock(pThis), VERR_CONCURRENT_ACCESS);
1661
1662	/*
1663	* Call accept().
1664	*/
1665	rtSocketErrorReset();
1666	int rc = VINF_SUCCESS;
1667	#ifdef RT_OS_WINDOWS
1668	int cbAddr = (int)*pcbAddr;
1669	#else
1670	socklen_t cbAddr = *pcbAddr;
1671	#endif
1672	RTSOCKETNATIVE hNativeClient = accept(pThis->hNative, pAddr, &cbAddr);
1673	if (hNativeClient != NIL_RTSOCKETNATIVE)
1674	{
1675	*pcbAddr = cbAddr;
1676
1677	/*
1678	* Wrap the client socket.
1679	*/
1680	rc = rtSocketCreateForNative(phClient, hNativeClient);
1681	if (RT_FAILURE(rc))
1682	{
1683	#ifdef RT_OS_WINDOWS
1684	closesocket(hNativeClient);
1685	#else
1686	close(hNativeClient);
1687	#endif
1688	}
1689	}
1690	else
1691	rc = rtSocketError();
1692
1693	rtSocketUnlock(pThis);
1694	return rc;
1695	}
1696
1697
1698	/**
1699	* Wrapper around connect.
1700	*
1701	* @returns IPRT status code.
1702	* @param hSocket The socket handle.
1703	* @param pAddr The socket address to connect to.
1704	*/
1705	int rtSocketConnect(RTSOCKET hSocket, PCRTNETADDR pAddr)
1706	{
1707	/*
1708	* Validate input.
1709	*/
1710	RTSOCKETINT *pThis = hSocket;
1711	AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
1712	AssertReturn(pThis->u32Magic == RTSOCKET_MAGIC, VERR_INVALID_HANDLE);
1713	AssertReturn(rtSocketTryLock(pThis), VERR_CONCURRENT_ACCESS);
1714
1715	RTSOCKADDRUNION u;
1716	int cbAddr;
1717	int rc = rtSocketAddrFromNetAddr(pAddr, &u, sizeof(u), &cbAddr);
1718	if (RT_SUCCESS(rc))
1719	{
1720	if (connect(pThis->hNative, &u.Addr, cbAddr) != 0)
1721	rc = rtSocketError();
1722	}
1723
1724	rtSocketUnlock(pThis);
1725	return rc;
1726	}
1727
1728
1729	/**
1730	* Wrapper around setsockopt.
1731	*
1732	* @returns IPRT status code.
1733	* @param hSocket The socket handle.
1734	* @param iLevel The protocol level, e.g. IPPORTO_TCP.
1735	* @param iOption The option, e.g. TCP_NODELAY.
1736	* @param pvValue The value buffer.
1737	* @param cbValue The size of the value pointed to by pvValue.
1738	*/
1739	int rtSocketSetOpt(RTSOCKET hSocket, int iLevel, int iOption, void const *pvValue, int cbValue)
1740	{
1741	/*
1742	* Validate input.
1743	*/
1744	RTSOCKETINT *pThis = hSocket;
1745	AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
1746	AssertReturn(pThis->u32Magic == RTSOCKET_MAGIC, VERR_INVALID_HANDLE);
1747	AssertReturn(rtSocketTryLock(pThis), VERR_CONCURRENT_ACCESS);
1748
1749	int rc = VINF_SUCCESS;
1750	if (setsockopt(pThis->hNative, iLevel, iOption, (const char *)pvValue, cbValue) != 0)
1751	rc = rtSocketError();
1752
1753	rtSocketUnlock(pThis);
1754	return rc;
1755	}
1756
1757	#ifdef RT_OS_WINDOWS
1758
1759	/**
1760	* Internal RTPollSetAdd helper that returns the handle that should be added to
1761	* the pollset.
1762	*
1763	* @returns Valid handle on success, INVALID_HANDLE_VALUE on failure.
1764	* @param hSocket The socket handle.
1765	* @param fEvents The events we're polling for.
1766	* @param ph where to put the primary handle.
1767	*/
1768	int rtSocketPollGetHandle(RTSOCKET hSocket, uint32_t fEvents, PHANDLE ph)
1769	{
1770	RTSOCKETINT *pThis = hSocket;
1771	AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
1772	AssertReturn(pThis->u32Magic == RTSOCKET_MAGIC, VERR_INVALID_HANDLE);
1773	AssertReturn(rtSocketTryLock(pThis), VERR_CONCURRENT_ACCESS);
1774
1775	int rc = VINF_SUCCESS;
1776	if (pThis->hEvent != WSA_INVALID_EVENT)
1777	*ph = pThis->hEvent;
1778	else
1779	{
1780	*ph = pThis->hEvent = WSACreateEvent();
1781	if (pThis->hEvent == WSA_INVALID_EVENT)
1782	rc = rtSocketError();
1783	}
1784
1785	rtSocketUnlock(pThis);
1786	return rc;
1787	}
1788
1789
1790	/**
1791	* Undos the harm done by WSAEventSelect.
1792	*
1793	* @returns IPRT status code.
1794	* @param pThis The socket handle.
1795	*/
1796	static int rtSocketPollClearEventAndRestoreBlocking(RTSOCKETINT *pThis)
1797	{
1798	int rc = VINF_SUCCESS;
1799	if (pThis->fSubscribedEvts)
1800	{
1801	if (WSAEventSelect(pThis->hNative, WSA_INVALID_EVENT, 0) == 0)
1802	{
1803	pThis->fSubscribedEvts = 0;
1804
1805	/*
1806	* Switch back to blocking mode if that was the state before the
1807	* operation.
1808	*/
1809	if (pThis->fBlocking)
1810	{
1811	u_long fNonBlocking = 0;
1812	int rc2 = ioctlsocket(pThis->hNative, FIONBIO, &fNonBlocking);
1813	if (rc2 != 0)
1814	{
1815	rc = rtSocketError();
1816	AssertMsgFailed(("%Rrc; rc2=%d\n", rc, rc2));
1817	}
1818	}
1819	}
1820	else
1821	{
1822	rc = rtSocketError();
1823	AssertMsgFailed(("%Rrc\n", rc));
1824	}
1825	}
1826	return rc;
1827	}
1828
1829
1830	/**
1831	* Updates the mask of events we're subscribing to.
1832	*
1833	* @returns IPRT status code.
1834	* @param pThis The socket handle.
1835	* @param fEvents The events we want to subscribe to.
1836	*/
1837	static int rtSocketPollUpdateEvents(RTSOCKETINT *pThis, uint32_t fEvents)
1838	{
1839	LONG fNetworkEvents = 0;
1840	if (fEvents & RTPOLL_EVT_READ)
1841	fNetworkEvents \|= FD_READ;
1842	if (fEvents & RTPOLL_EVT_WRITE)
1843	fNetworkEvents \|= FD_WRITE;
1844	if (fEvents & RTPOLL_EVT_ERROR)
1845	fNetworkEvents \|= FD_CLOSE;
1846	LogFlowFunc(("fNetworkEvents=%#x\n", fNetworkEvents));
1847	if (WSAEventSelect(pThis->hNative, pThis->hEvent, fNetworkEvents) == 0)
1848	{
1849	pThis->fSubscribedEvts = fEvents;
1850	return VINF_SUCCESS;
1851	}
1852
1853	int rc = rtSocketError();
1854	AssertMsgFailed(("fNetworkEvents=%#x rc=%Rrc\n", fNetworkEvents, rtSocketError()));
1855	return rc;
1856	}
1857
1858
1859	/**
1860	* Checks for pending events.
1861	*
1862	* @returns Event mask or 0.
1863	* @param pThis The socket handle.
1864	* @param fEvents The desired events.
1865	*/
1866	static uint32_t rtSocketPollCheck(RTSOCKETINT *pThis, uint32_t fEvents)
1867	{
1868	int rc = VINF_SUCCESS;
1869	uint32_t fRetEvents = 0;
1870
1871	LogFlowFunc(("pThis=%#p fEvents=%#x\n", pThis, fEvents));
1872
1873	/* Make sure WSAEnumNetworkEvents returns what we want. */
1874	if ((pThis->fSubscribedEvts & fEvents) != fEvents)
1875	rc = rtSocketPollUpdateEvents(pThis, pThis->fSubscribedEvts \| fEvents);
1876
1877	/* Get the event mask, ASSUMES that WSAEnumNetworkEvents doesn't clear stuff. */
1878	WSANETWORKEVENTS NetEvts;
1879	RT_ZERO(NetEvts);
1880	if (WSAEnumNetworkEvents(pThis->hNative, pThis->hEvent, &NetEvts) == 0)
1881	{
1882	if ( (NetEvts.lNetworkEvents & FD_READ)
1883	&& (fEvents & RTPOLL_EVT_READ)
1884	&& NetEvts.iErrorCode[FD_READ_BIT] == 0)
1885	fRetEvents \|= RTPOLL_EVT_READ;
1886
1887	if ( (NetEvts.lNetworkEvents & FD_WRITE)
1888	&& (fEvents & RTPOLL_EVT_WRITE)
1889	&& NetEvts.iErrorCode[FD_WRITE_BIT] == 0)
1890	fRetEvents \|= RTPOLL_EVT_WRITE;
1891
1892	if (fEvents & RTPOLL_EVT_ERROR)
1893	{
1894	if (NetEvts.lNetworkEvents & FD_CLOSE)
1895	fRetEvents \|= RTPOLL_EVT_ERROR;
1896	else
1897	for (uint32_t i = 0; i < FD_MAX_EVENTS; i++)
1898	if ( (NetEvts.lNetworkEvents & (1L << i))
1899	&& NetEvts.iErrorCode[i] != 0)
1900	fRetEvents \|= RTPOLL_EVT_ERROR;
1901	}
1902	}
1903	else
1904	rc = rtSocketError();
1905
1906	/* Fall back on select if we hit an error above. */
1907	if (RT_FAILURE(rc))
1908	{
1909	/** @todo */
1910	}
1911
1912	LogFlowFunc(("fRetEvents=%#x\n", fRetEvents));
1913	return fRetEvents;
1914	}
1915
1916
1917	/**
1918	* Internal RTPoll helper that polls the socket handle and, if @a fNoWait is
1919	* clear, starts whatever actions we've got running during the poll call.
1920	*
1921	* @returns 0 if no pending events, actions initiated if @a fNoWait is clear.
1922	* Event mask (in @a fEvents) and no actions if the handle is ready
1923	* already.
1924	* UINT32_MAX (asserted) if the socket handle is busy in I/O or a
1925	* different poll set.
1926	*
1927	* @param hSocket The socket handle.
1928	* @param hPollSet The poll set handle (for access checks).
1929	* @param fEvents The events we're polling for.
1930	* @param fFinalEntry Set if this is the final entry for this handle
1931	* in this poll set. This can be used for dealing
1932	* with duplicate entries.
1933	* @param fNoWait Set if it's a zero-wait poll call. Clear if
1934	* we'll wait for an event to occur.
1935	*
1936	* @remarks There is a potential race wrt duplicate handles when @a fNoWait is
1937	* @c true, we don't currently care about that oddity...
1938	*/
1939	uint32_t rtSocketPollStart(RTSOCKET hSocket, RTPOLLSET hPollSet, uint32_t fEvents, bool fFinalEntry, bool fNoWait)
1940	{
1941	RTSOCKETINT *pThis = hSocket;
1942	AssertPtrReturn(pThis, UINT32_MAX);
1943	AssertReturn(pThis->u32Magic == RTSOCKET_MAGIC, UINT32_MAX);
1944	if (rtSocketTryLock(pThis))
1945	pThis->hPollSet = hPollSet;
1946	else
1947	{
1948	AssertReturn(pThis->hPollSet == hPollSet, UINT32_MAX);
1949	ASMAtomicIncU32(&pThis->cUsers);
1950	}
1951
1952	/* (rtSocketPollCheck will reset the event object). */
1953	uint32_t fRetEvents = pThis->fEventsSaved;
1954	pThis->fEventsSaved = 0; /* Reset */
1955	fRetEvents \|= rtSocketPollCheck(pThis, fEvents);
1956
1957	if ( !fRetEvents
1958	&& !fNoWait)
1959	{
1960	pThis->fPollEvts \|= fEvents;
1961	if ( fFinalEntry
1962	&& pThis->fSubscribedEvts != pThis->fPollEvts)
1963	{
1964	int rc = rtSocketPollUpdateEvents(pThis, pThis->fPollEvts);
1965	if (RT_FAILURE(rc))
1966	{
1967	pThis->fPollEvts = 0;
1968	fRetEvents = UINT32_MAX;
1969	}
1970	}
1971	}
1972
1973	if (fRetEvents \|\| fNoWait)
1974	{
1975	if (pThis->cUsers == 1)
1976	{
1977	rtSocketPollClearEventAndRestoreBlocking(pThis);
1978	pThis->hPollSet = NIL_RTPOLLSET;
1979	}
1980	ASMAtomicDecU32(&pThis->cUsers);
1981	}
1982
1983	return fRetEvents;
1984	}
1985
1986
1987	/**
1988	* Called after a WaitForMultipleObjects returned in order to check for pending
1989	* events and stop whatever actions that rtSocketPollStart() initiated.
1990	*
1991	* @returns Event mask or 0.
1992	*
1993	* @param hSocket The socket handle.
1994	* @param fEvents The events we're polling for.
1995	* @param fFinalEntry Set if this is the final entry for this handle
1996	* in this poll set. This can be used for dealing
1997	* with duplicate entries. Only keep in mind that
1998	* this method is called in reverse order, so the
1999	* first call will have this set (when the entire
2000	* set was processed).
2001	* @param fHarvestEvents Set if we should check for pending events.
2002	*/
2003	uint32_t rtSocketPollDone(RTSOCKET hSocket, uint32_t fEvents, bool fFinalEntry, bool fHarvestEvents)
2004	{
2005	RTSOCKETINT *pThis = hSocket;
2006	AssertPtrReturn(pThis, 0);
2007	AssertReturn(pThis->u32Magic == RTSOCKET_MAGIC, 0);
2008	Assert(pThis->cUsers > 0);
2009	Assert(pThis->hPollSet != NIL_RTPOLLSET);
2010
2011	/* Harvest events and clear the event mask for the next round of polling. */
2012	uint32_t fRetEvents = rtSocketPollCheck(pThis, fEvents);
2013	pThis->fPollEvts = 0;
2014
2015	/*
2016	* Save the write event if required.
2017	* It is only posted once and might get lost if the another source in the
2018	* pollset with a higher priority has pending events.
2019	*/
2020	if ( !fHarvestEvents
2021	&& fRetEvents)
2022	{
2023	pThis->fEventsSaved = fRetEvents;
2024	fRetEvents = 0;
2025	}
2026
2027	/* Make the socket blocking again and unlock the handle. */
2028	if (pThis->cUsers == 1)
2029	{
2030	rtSocketPollClearEventAndRestoreBlocking(pThis);
2031	pThis->hPollSet = NIL_RTPOLLSET;
2032	}
2033	ASMAtomicDecU32(&pThis->cUsers);
2034	return fRetEvents;
2035	}
2036
2037	#endif /* RT_OS_WINDOWS */

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source: vbox/trunk/src/VBox/Runtime/r3/socket.cpp@ 43206

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