1 | /* $Id: ClipboardProvider.cpp 79267 2019-06-21 10:11:59Z vboxsync $ */
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2 | /** @file
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3 | * Shared Clipboard - Provider base class implementation.
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4 | */
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5 |
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6 | /*
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7 | * Copyright (C) 2019 Oracle Corporation
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8 | *
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9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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10 | * available from http://www.virtualbox.org. This file is free software;
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11 | * you can redistribute it and/or modify it under the terms of the GNU
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12 | * General Public License (GPL) as published by the Free Software
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13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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16 | */
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17 |
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18 |
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19 | /*********************************************************************************************************************************
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20 | * Header Files *
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21 | *********************************************************************************************************************************/
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22 | #define LOG_GROUP LOG_GROUP_SHARED_CLIPBOARD
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23 | #include <VBox/GuestHost/SharedClipboard-uri.h>
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24 |
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25 | #include <iprt/asm.h>
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26 | #include <iprt/assert.h>
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27 | #include <iprt/dir.h>
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28 | #include <iprt/errcore.h>
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29 | #include <iprt/file.h>
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30 | #include <iprt/path.h>
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31 | #include <iprt/semaphore.h>
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32 | #include <iprt/string.h>
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33 |
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34 | #include <VBox/log.h>
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35 |
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36 |
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37 | SharedClipboardProvider::Event::Event(uint32_t uMsg)
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38 | : mMsg(uMsg)
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39 | , mpvData(NULL)
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40 | , mcbData(0)
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41 | {
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42 | int rc2 = RTSemEventCreate(&mEvent);
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43 | AssertRC(rc2);
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44 | }
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45 |
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46 | SharedClipboardProvider::Event::~Event()
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47 | {
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48 | Reset();
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49 |
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50 | int rc2 = RTSemEventDestroy(mEvent);
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51 | AssertRC(rc2);
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52 | }
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53 |
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54 | /**
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55 | * Resets an event by clearing the (allocated) data.
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56 | */
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57 | void SharedClipboardProvider::Event::Reset(void)
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58 | {
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59 | LogFlowFuncEnter();
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60 |
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61 | if (mpvData)
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62 | {
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63 | Assert(mcbData);
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64 |
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65 | RTMemFree(mpvData);
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66 | mpvData = NULL;
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67 | }
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68 |
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69 | mcbData = 0;
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70 | }
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71 |
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72 | /**
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73 | * Sets user data associated to an event.
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74 | *
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75 | * @returns VBox status code.
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76 | * @param pvData Pointer to user data to set.
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77 | * @param cbData Size (in bytes) of user data to set.
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78 | */
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79 | int SharedClipboardProvider::Event::SetData(const void *pvData, uint32_t cbData)
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80 | {
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81 | Reset();
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82 |
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83 | if (!cbData)
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84 | return VINF_SUCCESS;
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85 |
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86 | mpvData = RTMemDup(pvData, cbData);
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87 | if (!mpvData)
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88 | return VERR_NO_MEMORY;
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89 |
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90 | mcbData = cbData;
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91 |
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92 | return VINF_SUCCESS;
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93 | }
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94 |
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95 | /**
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96 | * Waits for an event to get signalled.
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97 | * Will return VERR_NOT_FOUND if no event has been found.
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98 | *
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99 | * @returns VBox status code.
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100 | * @param uTimeoutMs Timeout (in ms) to wait.
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101 | */
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102 | int SharedClipboardProvider::Event::Wait(RTMSINTERVAL uTimeoutMs)
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103 | {
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104 | LogFlowFunc(("mMsg=%RU32, uTimeoutMs=%RU32\n", mMsg, uTimeoutMs));
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105 |
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106 | int rc = RTSemEventWait(mEvent, uTimeoutMs);
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107 |
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108 | LogFlowFuncLeaveRC(rc);
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109 | return rc;
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110 | }
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111 |
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112 | /**
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113 | * Lets the caller adopt (transfer ownership) the returned event data.
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114 | * The caller is responsible of free'ing the data accordingly.
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115 | *
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116 | * @returns Pointer to the adopted event's raw data.
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117 | */
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118 | void *SharedClipboardProvider::Event::DataAdopt(void)
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119 | {
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120 | void *pvData = mpvData;
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121 |
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122 | mpvData = NULL;
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123 | mcbData = 0;
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124 |
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125 | return pvData;
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126 | }
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127 |
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128 | /**
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129 | * Returns the event's (raw) data (mutable).
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130 | *
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131 | * @returns Pointer to the event's raw data.
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132 | */
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133 | void *SharedClipboardProvider::Event::DataRaw(void)
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134 | {
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135 | return mpvData;
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136 | }
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137 |
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138 | /**
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139 | * Returns the event's data size (in bytes).
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140 | *
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141 | * @returns Data size (in bytes).
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142 | */
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143 | uint32_t SharedClipboardProvider::Event::DataSize(void)
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144 | {
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145 | return mcbData;
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146 | }
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147 |
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148 | SharedClipboardProvider::SharedClipboardProvider(void)
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149 | : m_cRefs(0)
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150 | , m_uTimeoutMs(30 * 1000 /* 30s timeout by default */)
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151 | {
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152 | LogFlowFuncEnter();
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153 | }
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154 |
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155 | SharedClipboardProvider::~SharedClipboardProvider(void)
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156 | {
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157 | LogFlowFuncEnter();
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158 |
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159 | Assert(m_cRefs == 0);
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160 |
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161 | eventUnregisterAll();
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162 | }
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163 |
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164 | /**
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165 | * Creates a Shared Clipboard provider.
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166 | *
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167 | * @returns New Shared Clipboard provider instance.
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168 | * @param pCtx Pointer to creation context.
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169 | */
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170 | /* static */
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171 | SharedClipboardProvider *SharedClipboardProvider::Create(PSHAREDCLIPBOARDPROVIDERCREATIONCTX pCtx)
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172 | {
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173 | AssertPtrReturn(pCtx, NULL);
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174 |
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175 | SharedClipboardProvider *pProvider = NULL;
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176 |
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177 | switch (pCtx->enmSource)
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178 | {
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179 | #ifdef VBOX_WITH_SHARED_CLIPBOARD_GUEST
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180 | case SHAREDCLIPBOARDPROVIDERSOURCE_VBGLR3:
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181 | pProvider = new SharedClipboardProviderVbglR3(pCtx->u.VbglR3.uClientID);
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182 | break;
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183 | #endif
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184 |
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185 | #ifdef VBOX_WITH_SHARED_CLIPBOARD_HOST
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186 | case SHAREDCLIPBOARDPROVIDERSOURCE_HOSTSERVICE:
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187 | pProvider = new SharedClipboardProviderHostService(pCtx->u.HostService.pArea);
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188 | break;
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189 | #endif
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190 | default:
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191 | AssertFailed();
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192 | break;
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193 | }
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194 |
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195 | if (pProvider)
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196 | pProvider->SetCallbacks(pCtx->pCallbacks);
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197 |
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198 | return pProvider;
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199 | }
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200 |
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201 | /**
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202 | * Adds a reference to a Shared Clipboard provider.
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203 | *
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204 | * @returns New reference count.
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205 | */
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206 | uint32_t SharedClipboardProvider::AddRef(void)
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207 | {
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208 | LogFlowFuncEnter();
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209 | return ASMAtomicIncU32(&m_cRefs);
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210 | }
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211 |
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212 | /**
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213 | * Removes a reference from a Shared Clipboard cache.
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214 | *
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215 | * @returns New reference count.
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216 | */
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217 | uint32_t SharedClipboardProvider::Release(void)
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218 | {
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219 | LogFlowFuncEnter();
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220 | Assert(m_cRefs);
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221 | return ASMAtomicDecU32(&m_cRefs);
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222 | }
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223 |
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224 | /**
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225 | * Sets or unsets the callback table to be used for a clipboard provider.
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226 | *
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227 | * @returns VBox status code.
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228 | * @param pCallbacks Pointer to callback table to set. Specify NULL to unset existing callbacks.
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229 | */
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230 | void SharedClipboardProvider::SetCallbacks(PSHAREDCLIPBOARDPROVIDERCALLBACKS pCallbacks)
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231 | {
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232 | /* pCallbacks might be NULL to unset callbacks. */
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233 |
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234 | LogFlowFunc(("pCallbacks=%p\n", pCallbacks));
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235 |
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236 | if (pCallbacks)
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237 | {
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238 | m_Callbacks = *pCallbacks;
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239 | }
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240 | else
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241 | RT_ZERO(m_Callbacks);
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242 | }
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243 |
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244 | /*
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245 | * Stubs.
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246 | */
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247 |
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248 | int SharedClipboardProvider::ReadDataHdr(PVBOXCLIPBOARDDATAHDR *ppDataHdr)
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249 | {
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250 | RT_NOREF(ppDataHdr);
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251 | return VERR_NOT_IMPLEMENTED;
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252 | }
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253 |
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254 | int SharedClipboardProvider::WriteDataHdr(const PVBOXCLIPBOARDDATAHDR pDataHdr)
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255 | {
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256 | RT_NOREF(pDataHdr);
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257 | return VERR_NOT_IMPLEMENTED;
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258 | }
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259 |
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260 | int SharedClipboardProvider::ReadDataChunk(const PVBOXCLIPBOARDDATAHDR pDataHdr, void *pvChunk, uint32_t cbChunk,
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261 | uint32_t fFlags /* = 0 */, uint32_t *pcbRead /* = NULL*/)
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262 | {
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263 | RT_NOREF(pDataHdr, pvChunk, cbChunk, fFlags, pcbRead);
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264 | return VERR_NOT_IMPLEMENTED;
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265 | }
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266 |
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267 | int SharedClipboardProvider::WriteDataChunk(const PVBOXCLIPBOARDDATAHDR pDataHdr, const void *pvChunk, uint32_t cbChunk,
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268 | uint32_t fFlags /* = 0 */, uint32_t *pcbWritten /* = NULL */)
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269 | {
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270 | RT_NOREF(pDataHdr, pvChunk, cbChunk, fFlags, pcbWritten);
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271 | return VERR_NOT_IMPLEMENTED;
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272 | }
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273 |
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274 | int SharedClipboardProvider::ReadDirectory(PVBOXCLIPBOARDDIRDATA *ppDirData)
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275 | {
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276 | RT_NOREF(ppDirData);
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277 |
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278 | LogFlowFuncEnter();
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279 |
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280 | int rc = VERR_NOT_IMPLEMENTED;
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281 |
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282 | LogFlowFuncLeaveRC(rc);
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283 | return rc;
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284 | }
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285 |
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286 | int SharedClipboardProvider::WriteDirectory(const PVBOXCLIPBOARDDIRDATA pDirData)
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287 | {
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288 | RT_NOREF(pDirData);
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289 |
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290 | LogFlowFuncEnter();
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291 |
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292 | int rc = VERR_NOT_IMPLEMENTED;
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293 |
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294 | LogFlowFuncLeaveRC(rc);
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295 | return rc;
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296 | }
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297 |
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298 | int SharedClipboardProvider::ReadFileHdr(PVBOXCLIPBOARDFILEHDR *ppFileHdr)
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299 | {
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300 | RT_NOREF(ppFileHdr);
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301 |
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302 | LogFlowFuncEnter();
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303 |
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304 | int rc = VERR_NOT_IMPLEMENTED;
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305 |
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306 | LogFlowFuncLeaveRC(rc);
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307 | return rc;
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308 | }
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309 |
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310 | int SharedClipboardProvider::WriteFileHdr(const PVBOXCLIPBOARDFILEHDR pFileHdr)
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311 | {
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312 | RT_NOREF(pFileHdr);
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313 |
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314 | LogFlowFuncEnter();
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315 |
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316 | int rc = VERR_NOT_IMPLEMENTED;
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317 |
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318 | LogFlowFuncLeaveRC(rc);
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319 | return rc;
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320 | }
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321 |
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322 | int SharedClipboardProvider::ReadFileData(void *pvData, uint32_t cbData, uint32_t fFlags /* = 0 */,
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323 | uint32_t *pcbRead /* = NULL */)
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324 | {
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325 | RT_NOREF(pvData, cbData, fFlags, pcbRead);
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326 |
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327 | LogFlowFuncEnter();
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328 |
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329 | int rc = VERR_NOT_IMPLEMENTED;
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330 |
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331 | LogFlowFuncLeaveRC(rc);
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332 | return rc;
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333 | }
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334 |
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335 | int SharedClipboardProvider::WriteFileData(void *pvData, uint32_t cbData, uint32_t fFlags /* = 0 */,
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336 | uint32_t *pcbWritten /* = NULL */)
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337 | {
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338 | RT_NOREF(pvData, cbData, fFlags, pcbWritten);
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339 |
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340 | LogFlowFuncEnter();
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341 |
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342 | int rc = VERR_NOT_IMPLEMENTED;
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343 |
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344 | LogFlowFuncLeaveRC(rc);
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345 | return rc;
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346 | }
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347 |
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348 | void SharedClipboardProvider::Reset(void)
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349 | {
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350 | }
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351 |
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352 | int SharedClipboardProvider::OnRead(PSHAREDCLIPBOARDPROVIDERREADPARMS pParms)
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353 | {
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354 | RT_NOREF(pParms);
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355 |
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356 | int rc = VERR_NOT_IMPLEMENTED;
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357 |
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358 | LogFlowFuncLeaveRC(rc);
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359 | return rc;
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360 | }
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361 |
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362 | int SharedClipboardProvider::OnWrite(PSHAREDCLIPBOARDPROVIDERWRITEPARMS pParms)
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363 | {
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364 | RT_NOREF(pParms);
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365 |
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366 | int rc = VERR_NOT_IMPLEMENTED;
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367 |
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368 | LogFlowFuncLeaveRC(rc);
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369 | return rc;
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370 | }
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371 |
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372 | /**
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373 | * Registers a new event.
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374 | * Will fail if an event with the same message ID already exists.
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375 | *
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376 | * @returns VBox status code.
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377 | * @param uMsg Message ID to register event for.
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378 | */
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379 | int SharedClipboardProvider::eventRegister(uint32_t uMsg)
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380 | {
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381 | LogFlowFunc(("uMsg=%RU32\n", uMsg));
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382 |
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383 | int rc;
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384 |
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385 | EventMap::const_iterator itEvent = m_mapEvents.find(uMsg);
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386 | if (itEvent == m_mapEvents.end())
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387 | {
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388 | SharedClipboardProvider::Event *pEvent = new SharedClipboardProvider::Event(uMsg);
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389 | if (pEvent) /** @todo Can this throw? */
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390 | {
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391 | m_mapEvents[uMsg] = pEvent; /** @todo Ditto. */
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392 |
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393 | rc = VINF_SUCCESS;
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394 | }
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395 | else
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396 | rc = VERR_NO_MEMORY;
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397 | }
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398 | else
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399 | rc = VERR_ALREADY_EXISTS;
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400 |
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401 | LogFlowFuncLeaveRC(rc);
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402 | return rc;
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403 | }
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404 |
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405 | /**
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406 | * Unregisters an existing event.
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407 | * Will return VERR_NOT_FOUND if no event has been found.
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408 | *
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409 | * @returns VBox status code.
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410 | * @param uMsg Message ID to unregister event for.
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411 | */
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412 | int SharedClipboardProvider::eventUnregister(uint32_t uMsg)
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413 | {
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414 | LogFlowFunc(("uMsg=%RU32\n", uMsg));
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415 |
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416 | int rc;
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417 |
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418 | EventMap::const_iterator itEvent = m_mapEvents.find(uMsg);
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419 | if (itEvent != m_mapEvents.end())
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420 | {
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421 | delete itEvent->second;
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422 | m_mapEvents.erase(itEvent);
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423 |
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424 | rc = VINF_SUCCESS;
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425 | }
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426 | else
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427 | rc = VERR_NOT_FOUND;
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428 |
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429 | LogFlowFuncLeaveRC(rc);
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430 | return rc;
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431 | }
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432 |
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433 | /**
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434 | * Unregisters all registered events.
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435 | *
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436 | * @returns VBox status code.
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437 | */
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438 | int SharedClipboardProvider::eventUnregisterAll(void)
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439 | {
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440 | int rc = VINF_SUCCESS;
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441 |
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442 | LogFlowFuncEnter();
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443 |
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444 | EventMap::const_iterator itEvent = m_mapEvents.begin();
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445 | while (itEvent != m_mapEvents.end())
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446 | {
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447 | delete itEvent->second;
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448 | m_mapEvents.erase(itEvent);
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449 |
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450 | itEvent = m_mapEvents.begin();
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451 | }
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452 |
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453 | LogFlowFuncLeaveRC(rc);
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454 | return rc;
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455 | }
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456 |
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457 | /**
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458 | * Signals an event.
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459 | * Will return VERR_NOT_FOUND if no event has been found.
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460 | *
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461 | * @returns VBox status code.
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462 | * @param uMsg Message ID of event to signal.
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463 | */
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464 | int SharedClipboardProvider::eventSignal(uint32_t uMsg)
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465 | {
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466 | LogFlowFunc(("uMsg=%RU32\n", uMsg));
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467 |
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468 | int rc;
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469 |
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470 | EventMap::const_iterator itEvent = m_mapEvents.find(uMsg);
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471 | if (itEvent != m_mapEvents.end())
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472 | {
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473 | rc = RTSemEventSignal(itEvent->second->mEvent);
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474 | }
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475 | else
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476 | rc = VERR_NOT_FOUND;
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477 |
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478 | LogFlowFuncLeaveRC(rc);
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479 | return rc;
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480 | }
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481 |
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482 | /**
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483 | * Returns the event for a specific message ID.
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484 | *
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485 | * @returns Pointer to event if found, or NULL if no event has been found
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486 | * @param uMsg Messagae ID to return event for.
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487 | */
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488 | SharedClipboardProvider::Event *SharedClipboardProvider::eventGet(uint32_t uMsg)
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489 | {
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490 | LogFlowFuncEnter();
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491 |
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492 | EventMap::const_iterator itEvent = m_mapEvents.find(uMsg);
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493 | if (itEvent != m_mapEvents.end())
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494 | return itEvent->second;
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495 |
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496 | return NULL;
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497 | }
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498 |
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499 | /**
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500 | * Waits for an event to get signalled and optionally returns related event data on success.
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501 | *
|
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502 | * @returns VBox status code.
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503 | * @param uMsg Message ID of event to wait for.
|
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504 | * @param pfnCallback Callback to use before waiting for event. Specify NULL if not needed.
|
---|
505 | * @param uTimeoutMs Timeout (in ms) to wait for.
|
---|
506 | * @param ppvData Where to store the related event data. Optioanl.
|
---|
507 | * @param pcbData Where to store the size (in bytes) of the related event data. Optioanl.
|
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508 | */
|
---|
509 | int SharedClipboardProvider::eventWait(uint32_t uMsg, PFNSSHAREDCLIPBOARDPROVIDERCALLBACK pfnCallback,
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510 | RTMSINTERVAL uTimeoutMs, void **ppvData, uint32_t *pcbData /* = NULL */)
|
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511 | {
|
---|
512 | LogFlowFunc(("uMsg=%RU32, uTimeoutMs=%RU32\n", uMsg, uTimeoutMs));
|
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513 |
|
---|
514 | int rc = VINF_SUCCESS;
|
---|
515 |
|
---|
516 | if (pfnCallback)
|
---|
517 | {
|
---|
518 | SHAREDCLIPBOARDPROVIDERCALLBACKDATA data = { this, m_Callbacks.pvUser };
|
---|
519 | rc = pfnCallback(&data);
|
---|
520 | }
|
---|
521 |
|
---|
522 | if (RT_SUCCESS(rc))
|
---|
523 | {
|
---|
524 | Event *pEvent = eventGet(uMsg);
|
---|
525 | if (pEvent)
|
---|
526 | {
|
---|
527 | rc = pEvent->Wait(m_uTimeoutMs);
|
---|
528 | if (RT_SUCCESS(rc))
|
---|
529 | {
|
---|
530 | if (pcbData)
|
---|
531 | *pcbData = pEvent->DataSize();
|
---|
532 |
|
---|
533 | if (ppvData)
|
---|
534 | *ppvData = pEvent->DataAdopt();
|
---|
535 |
|
---|
536 | pEvent->Reset();
|
---|
537 | }
|
---|
538 | }
|
---|
539 | else
|
---|
540 | rc = VERR_NOT_FOUND;
|
---|
541 | }
|
---|
542 |
|
---|
543 | LogFlowFuncLeaveRC(rc);
|
---|
544 | return rc;
|
---|
545 | }
|
---|
546 |
|
---|