VBoxGuestR3LibSharedFolders.cpp@ 35380

Last change on this file since 35380 was 35351, checked in by vboxsync, 14 years ago
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1	/* $Id: VBoxGuestR3LibSharedFolders.cpp 35351 2010-12-27 17:04:17Z vboxsync $ */
2	/** @file
3	* VBoxGuestR3Lib - Ring-3 Support Library for VirtualBox guest additions, shared folders.
4	*/
5
6	/*
7	* Copyright (C) 2010 Oracle Corporation
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	*
17	* 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	#include <iprt/string.h>
32	#include <iprt/mem.h>
33	#include <iprt/assert.h>
34	#include <iprt/cpp/autores.h>
35	#include <iprt/stdarg.h>
36	#include <VBox/log.h>
37	#include <VBox/shflsvc.h> /** @todo File should be moved to VBox/HostServices/SharedFolderSvc.h */
38
39	#include "VBGLR3Internal.h"
40
41
42	/**
43	* Connects to the shared folder service.
44	*
45	* @returns VBox status code
46	* @param pu32ClientId Where to put the client id on success. The client id
47	* must be passed to all the other calls to the service.
48	*/
49	VBGLR3DECL(int) VbglR3SharedFolderConnect(uint32_t *pu32ClientId)
50	{
51	VBoxGuestHGCMConnectInfo Info;
52	Info.result = VERR_WRONG_ORDER;
53	Info.Loc.type = VMMDevHGCMLoc_LocalHost_Existing;
54	RT_ZERO(Info.Loc.u);
55	strcpy(Info.Loc.u.host.achName, "VBoxSharedFolders");
56	Info.u32ClientID = UINT32_MAX; /* try make valgrind shut up. */
57
58	int rc = vbglR3DoIOCtl(VBOXGUEST_IOCTL_HGCM_CONNECT, &Info, sizeof(Info));
59	if (RT_SUCCESS(rc))
60	{
61	rc = Info.result;
62	if (RT_SUCCESS(rc))
63	*pu32ClientId = Info.u32ClientID;
64	}
65	return rc;
66	}
67
68
69	/**
70	* Disconnect from the shared folder service.
71	*
72	* @returns VBox status code.
73	* @param u32ClientId The client id returned by VbglR3InfoSvcConnect().
74	*/
75	VBGLR3DECL(int) VbglR3SharedFolderDisconnect(uint32_t u32ClientId)
76	{
77	VBoxGuestHGCMDisconnectInfo Info;
78	Info.result = VERR_WRONG_ORDER;
79	Info.u32ClientID = u32ClientId;
80
81	int rc = vbglR3DoIOCtl(VBOXGUEST_IOCTL_HGCM_DISCONNECT, &Info, sizeof(Info));
82	if (RT_SUCCESS(rc))
83	rc = Info.result;
84	return rc;
85	}
86
87
88	/**
89	* Checks whether a shared folder share exists or not.
90	*
91	* @returns True if shared folder exists, false if not.
92	* @param u32ClientId The client id returned by VbglR3InfoSvcConnect().
93	* @param pszShareName Shared folder name to check.
94	*/
95	VBGLR3DECL(bool) VbglR3SharedFolderExists(uint32_t u32ClientId, const char *pszShareName)
96	{
97	AssertPtr(pszShareName);
98
99	uint32_t cMappings;
100	VBGLR3SHAREDFOLDERMAPPING *paMappings;
101
102	/** @todo Use some caching here? */
103	bool fFound = false;
104	int rc = VbglR3SharedFolderGetMappings(u32ClientId, true /* Only process auto-mounted folders */,
105	&paMappings, &cMappings);
106	if (RT_SUCCESS(rc))
107	{
108	for (uint32_t i = 0; i < cMappings && !fFound; i++)
109	{
110	char *pszName = NULL;
111	rc = VbglR3SharedFolderGetName(u32ClientId, paMappings[i].u32Root, &pszName);
112	if ( RT_SUCCESS(rc)
113	&& *pszName)
114	{
115	if (RTStrICmp(pszName, pszShareName) == 0)
116	fFound = true;
117	RTStrFree(pszName);
118	}
119	}
120	RTMemFree(paMappings);
121	}
122	return fFound;
123	}
124
125
126	/**
127	* Get the list of available shared folders.
128	*
129	* @returns VBox status code.
130	* @param u32ClientId The client id returned by VbglR3SharedFolderConnect().
131	* @param fAutoMountOnly Flag whether only auto-mounted shared folders
132	* should be reported.
133	* @param ppaMappings Allocated array which will retrieve the mapping info. Needs
134	* to be freed with VbglR3SharedFolderFreeMappings() later.
135	* @param pcMappings The number of mappings returned in @a ppaMappings.
136	*/
137	VBGLR3DECL(int) VbglR3SharedFolderGetMappings(uint32_t u32ClientId, bool fAutoMountOnly,
138	PVBGLR3SHAREDFOLDERMAPPING ppaMappings, uint32_t pcMappings)
139	{
140	AssertPtr(pcMappings);
141
142	VBoxSFQueryMappings Msg;
143
144	Msg.callInfo.result = VERR_WRONG_ORDER;
145	Msg.callInfo.u32ClientID = u32ClientId;
146	Msg.callInfo.u32Function = SHFL_FN_QUERY_MAPPINGS;
147	Msg.callInfo.cParms = 3;
148
149	/* Set the mapping flags. */
150	uint32_t u32Flags = 0; /** @todo SHFL_MF_UTF8 is not implemented yet. */
151	if (fAutoMountOnly) /* We only want the mappings which get auto-mounted. */
152	u32Flags \|= SHFL_MF_AUTOMOUNT;
153	VbglHGCMParmUInt32Set(&Msg.flags, u32Flags);
154
155	/*
156	* Prepare and get the actual mappings from the host service.
157	*/
158	int rc = VINF_SUCCESS;
159	uint32_t cMappings = 8; /* Should be a good default value. */
160	uint32_t cbSize = cMappings * sizeof(VBGLR3SHAREDFOLDERMAPPING);
161	VBGLR3SHAREDFOLDERMAPPING *ppaMappingsTemp = (PVBGLR3SHAREDFOLDERMAPPING)RTMemAllocZ(cbSize);
162	if (ppaMappingsTemp == NULL)
163	rc = VERR_NO_MEMORY;
164
165	*pcMappings = 0;
166	do
167	{
168	VbglHGCMParmUInt32Set(&Msg.numberOfMappings, cMappings);
169	VbglHGCMParmPtrSet(&Msg.mappings, ppaMappingsTemp, cbSize);
170
171	rc = vbglR3DoIOCtl(VBOXGUEST_IOCTL_HGCM_CALL(sizeof(Msg)), &Msg, sizeof(Msg));
172	if (RT_SUCCESS(rc))
173	{
174	rc = Msg.callInfo.result;
175	if (RT_SUCCESS(rc))
176	{
177	VbglHGCMParmUInt32Get(&Msg.numberOfMappings, pcMappings);
178
179	/* Do we have more mappings than we have allocated space for? */
180	if (rc == VINF_BUFFER_OVERFLOW)
181	{
182	cMappings = *pcMappings;
183	cbSize = cMappings * sizeof(VBGLR3SHAREDFOLDERMAPPING);
184	void *pvNew = RTMemRealloc(ppaMappingsTemp, cbSize);
185	AssertPtrBreakStmt(pvNew, rc = VERR_NO_MEMORY);
186	ppaMappingsTemp = (PVBGLR3SHAREDFOLDERMAPPING)pvNew;
187	}
188	else
189	*ppaMappings = ppaMappingsTemp;
190	}
191	}
192	} while (rc == VINF_BUFFER_OVERFLOW);
193
194	if (RT_FAILURE(rc) && ppaMappingsTemp)
195	RTMemFree(ppaMappingsTemp);
196
197	return rc;
198	}
199
200
201	/**
202	* Frees the shared folder mappings allocated by
203	* VbglR3SharedFolderGetMappings() before.
204	*
205	* @param paMappings What
206	*/
207	VBGLR3DECL(void) VbglR3SharedFolderFreeMappings(PVBGLR3SHAREDFOLDERMAPPING paMappings)
208	{
209	RTMemFree(paMappings);
210	}
211
212
213	/**
214	* Get the real name of a shared folder.
215	*
216	* @returns VBox status code.
217	* @param u32ClientId The client id returned by VbglR3InvsSvcConnect().
218	* @param u32Root Root ID of shared folder to get the name for.
219	* @param ppszName Where to return the name string. This shall be
220	* freed by calling RTStrFree.
221	*/
222	VBGLR3DECL(int) VbglR3SharedFolderGetName(uint32_t u32ClientId, uint32_t u32Root, char **ppszName)
223	{
224	AssertPtr(ppszName);
225
226	VBoxSFQueryMapName Msg;
227
228	Msg.callInfo.result = VERR_WRONG_ORDER;
229	Msg.callInfo.u32ClientID = u32ClientId;
230	Msg.callInfo.u32Function = SHFL_FN_QUERY_MAP_NAME;
231	Msg.callInfo.cParms = 2;
232
233	int rc;
234	uint32_t cbString = sizeof(SHFLSTRING) + SHFL_MAX_LEN;
235	PSHFLSTRING pString = (PSHFLSTRING)RTMemAlloc(cbString);
236	if (pString)
237	{
238	RT_ZERO(*pString);
239	ShflStringInitBuffer(pString, SHFL_MAX_LEN);
240
241	VbglHGCMParmUInt32Set(&Msg.root, u32Root);
242	VbglHGCMParmPtrSet(&Msg.name, pString, cbString);
243
244	rc = vbglR3DoIOCtl(VBOXGUEST_IOCTL_HGCM_CALL(sizeof(Msg)), &Msg, sizeof(Msg));
245	if (RT_SUCCESS(rc))
246	{
247	rc = Msg.callInfo.result;
248	if (RT_SUCCESS(rc))
249	{
250	*ppszName = NULL;
251	rc = RTUtf16ToUtf8(&pString->String.ucs2[0], ppszName);
252	}
253	}
254	RTMemFree(pString);
255	}
256	else
257	rc = VERR_INVALID_PARAMETER;
258	return rc;
259	}
260
261	/**
262	* Retrieves the prefix for a shared folder mount point. If no prefix
263	* is set in the guest properties "sf_" is returned.
264	*
265	* @returns VBox status code.
266	* @param ppszPrefix Where to return the prefix string. This shall be
267	* freed by calling RTStrFree.
268	*/
269	VBGLR3DECL(int) VbglR3SharedFolderGetMountPrefix(char **ppszPrefix)
270	{
271	AssertPtrReturn(ppszPrefix, VERR_INVALID_POINTER);
272	int rc;
273	#ifdef VBOX_WITH_GUEST_PROPS
274	uint32_t u32ClientIdGuestProp;
275	rc = VbglR3GuestPropConnect(&u32ClientIdGuestProp);
276	if (RT_SUCCESS(rc))
277	{
278	rc = VbglR3GuestPropReadValueAlloc(u32ClientIdGuestProp, "/VirtualBox/GuestAdd/SharedFolders/MountPrefix", ppszPrefix);
279	if (rc == VERR_NOT_FOUND) /* No prefix set? Then set the default. */
280	{
281	#endif
282	rc = RTStrDupEx(ppszPrefix, "sf_");
283	#ifdef VBOX_WITH_GUEST_PROPS
284	}
285	VbglR3GuestPropDisconnect(u32ClientIdGuestProp);
286	}
287	#endif
288	return rc;
289	}
290
291	/**
292	* Retrieves the mount root directory for auto-mounted shared
293	* folders. mount point. If no string is set (VERR_NOT_FOUND)
294	* it's up on the caller (guest) to decide where to mount.
295	*
296	* @returns VBox status code.
297	* @param ppszDir Where to return the directory
298	* string. This shall be freed by
299	* calling RTStrFree.
300	*/
301	VBGLR3DECL(int) VbglR3SharedFolderGetMountDir(char **ppszDir)
302	{
303	AssertPtrReturn(ppszDir, VERR_INVALID_POINTER);
304	int rc;
305	#ifdef VBOX_WITH_GUEST_PROPS
306	uint32_t u32ClientIdGuestProp;
307	rc = VbglR3GuestPropConnect(&u32ClientIdGuestProp);
308	if (RT_SUCCESS(rc))
309	{
310	rc = VbglR3GuestPropReadValueAlloc(u32ClientIdGuestProp, "/VirtualBox/GuestAdd/SharedFolders/MountDir", ppszDir);
311	VbglR3GuestPropDisconnect(u32ClientIdGuestProp);
312	}
313	#endif
314	return rc;
315	}
316

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source: vbox/trunk/src/VBox/Additions/common/VBoxGuestLib/VBoxGuestR3LibSharedFolders.cpp@ 35380

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