| 1 | /** $Id: clipboard.cpp 69500 2017-10-28 15:14:05Z vboxsync $ */
|
|---|
| 2 | /** @file
|
|---|
| 3 | * Guest Additions - X11 Shared Clipboard.
|
|---|
| 4 | */
|
|---|
| 5 |
|
|---|
| 6 | /*
|
|---|
| 7 | * Copyright (C) 2007-2017 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 |
|
|---|
| 18 |
|
|---|
| 19 | /*********************************************************************************************************************************
|
|---|
| 20 | * Header Files *
|
|---|
| 21 | *********************************************************************************************************************************/
|
|---|
| 22 | #include <iprt/alloc.h>
|
|---|
| 23 | #include <iprt/asm.h>
|
|---|
| 24 | #include <iprt/assert.h>
|
|---|
| 25 | #include <iprt/initterm.h>
|
|---|
| 26 | #include <iprt/mem.h>
|
|---|
| 27 | #include <iprt/string.h>
|
|---|
| 28 | #include <iprt/process.h>
|
|---|
| 29 | #include <iprt/semaphore.h>
|
|---|
| 30 |
|
|---|
| 31 | #include <VBox/log.h>
|
|---|
| 32 | #include <VBox/VBoxGuestLib.h>
|
|---|
| 33 | #include <VBox/HostServices/VBoxClipboardSvc.h>
|
|---|
| 34 | #include <VBox/GuestHost/SharedClipboard.h>
|
|---|
| 35 |
|
|---|
| 36 | #include "VBoxClient.h"
|
|---|
| 37 |
|
|---|
| 38 |
|
|---|
| 39 | /*********************************************************************************************************************************
|
|---|
| 40 | * Global Variables *
|
|---|
| 41 | *********************************************************************************************************************************/
|
|---|
| 42 |
|
|---|
| 43 | /**
|
|---|
| 44 | * Global clipboard context information.
|
|---|
| 45 | */
|
|---|
| 46 | struct _VBOXCLIPBOARDCONTEXT
|
|---|
| 47 | {
|
|---|
| 48 | /** Client ID for the clipboard subsystem */
|
|---|
| 49 | uint32_t client;
|
|---|
| 50 |
|
|---|
| 51 | /** Pointer to the X11 clipboard backend */
|
|---|
| 52 | CLIPBACKEND *pBackend;
|
|---|
| 53 | };
|
|---|
| 54 |
|
|---|
| 55 | /** Only one client is supported. There seems to be no need for more clients. */
|
|---|
| 56 | static VBOXCLIPBOARDCONTEXT g_ctx;
|
|---|
| 57 |
|
|---|
| 58 |
|
|---|
| 59 | /**
|
|---|
| 60 | * Transfer clipboard data from the guest to the host.
|
|---|
| 61 | *
|
|---|
| 62 | * @returns VBox result code
|
|---|
| 63 | * @param u32Format The format of the data being sent
|
|---|
| 64 | * @param pv Pointer to the data being sent
|
|---|
| 65 | * @param cb Size of the data being sent in bytes
|
|---|
| 66 | */
|
|---|
| 67 | static int vboxClipboardSendData(uint32_t u32Format, void *pv, uint32_t cb)
|
|---|
| 68 | {
|
|---|
| 69 | int rc;
|
|---|
| 70 | LogRelFlowFunc(("u32Format=%d, pv=%p, cb=%d\n", u32Format, pv, cb));
|
|---|
| 71 | rc = VbglR3ClipboardWriteData(g_ctx.client, u32Format, pv, cb);
|
|---|
| 72 | LogRelFlowFunc(("rc=%Rrc\n", rc));
|
|---|
| 73 | return rc;
|
|---|
| 74 | }
|
|---|
| 75 |
|
|---|
| 76 |
|
|---|
| 77 | /**
|
|---|
| 78 | * Get clipboard data from the host.
|
|---|
| 79 | *
|
|---|
| 80 | * @returns VBox result code
|
|---|
| 81 | * @param pCtx Our context information
|
|---|
| 82 | * @param u32Format The format of the data being requested
|
|---|
| 83 | * @retval ppv On success and if pcb > 0, this will point to a buffer
|
|---|
| 84 | * to be freed with RTMemFree containing the data read.
|
|---|
| 85 | * @retval pcb On success, this contains the number of bytes of data
|
|---|
| 86 | * returned
|
|---|
| 87 | */
|
|---|
| 88 | int ClipRequestDataForX11(VBOXCLIPBOARDCONTEXT *pCtx, uint32_t u32Format, void **ppv, uint32_t *pcb)
|
|---|
| 89 | {
|
|---|
| 90 | RT_NOREF1(pCtx);
|
|---|
| 91 | int rc = VINF_SUCCESS;
|
|---|
| 92 | uint32_t cb = 1024;
|
|---|
| 93 | void *pv = RTMemAlloc(cb);
|
|---|
| 94 |
|
|---|
| 95 | *ppv = 0;
|
|---|
| 96 | LogRelFlowFunc(("u32Format=%u\n", u32Format));
|
|---|
| 97 | if (RT_UNLIKELY(!pv))
|
|---|
| 98 | rc = VERR_NO_MEMORY;
|
|---|
| 99 | if (RT_SUCCESS(rc))
|
|---|
| 100 | rc = VbglR3ClipboardReadData(g_ctx.client, u32Format, pv, cb, pcb);
|
|---|
| 101 | if (RT_SUCCESS(rc) && (rc != VINF_BUFFER_OVERFLOW))
|
|---|
| 102 | *ppv = pv;
|
|---|
| 103 | /* A return value of VINF_BUFFER_OVERFLOW tells us to try again with a
|
|---|
| 104 | * larger buffer. The size of the buffer needed is placed in *pcb.
|
|---|
| 105 | * So we start all over again. */
|
|---|
| 106 | if (rc == VINF_BUFFER_OVERFLOW)
|
|---|
| 107 | {
|
|---|
| 108 | cb = *pcb;
|
|---|
| 109 | RTMemFree(pv);
|
|---|
| 110 | pv = RTMemAlloc(cb);
|
|---|
| 111 | if (RT_UNLIKELY(!pv))
|
|---|
| 112 | rc = VERR_NO_MEMORY;
|
|---|
| 113 | if (RT_SUCCESS(rc))
|
|---|
| 114 | rc = VbglR3ClipboardReadData(g_ctx.client, u32Format, pv, cb, pcb);
|
|---|
| 115 | if (RT_SUCCESS(rc) && (rc != VINF_BUFFER_OVERFLOW))
|
|---|
| 116 | *ppv = pv;
|
|---|
| 117 | }
|
|---|
| 118 | /* Catch other errors. This also catches the case in which the buffer was
|
|---|
| 119 | * too small a second time, possibly because the clipboard contents
|
|---|
| 120 | * changed half-way through the operation. Since we can't say whether or
|
|---|
| 121 | * not this is actually an error, we just return size 0.
|
|---|
| 122 | */
|
|---|
| 123 | if (RT_FAILURE(rc) || (VINF_BUFFER_OVERFLOW == rc))
|
|---|
| 124 | {
|
|---|
| 125 | *pcb = 0;
|
|---|
| 126 | if (pv != NULL)
|
|---|
| 127 | RTMemFree(pv);
|
|---|
| 128 | }
|
|---|
| 129 | LogRelFlowFunc(("returning %Rrc\n", rc));
|
|---|
| 130 | if (RT_SUCCESS(rc))
|
|---|
| 131 | LogRelFlow((" *pcb=%d\n", *pcb));
|
|---|
| 132 | return rc;
|
|---|
| 133 | }
|
|---|
| 134 |
|
|---|
| 135 | /** Opaque data structure describing a request from the host for clipboard
|
|---|
| 136 | * data, passed in when the request is forwarded to the X11 backend so that
|
|---|
| 137 | * it can be completed correctly. */
|
|---|
| 138 | struct _CLIPREADCBREQ
|
|---|
| 139 | {
|
|---|
| 140 | /** The data format that was requested. */
|
|---|
| 141 | uint32_t u32Format;
|
|---|
| 142 | };
|
|---|
| 143 |
|
|---|
| 144 | /**
|
|---|
| 145 | * Tell the host that new clipboard formats are available.
|
|---|
| 146 | *
|
|---|
| 147 | * @param pCtx Our context information
|
|---|
| 148 | * @param u32Formats The formats to advertise
|
|---|
| 149 | */
|
|---|
| 150 | void ClipReportX11Formats(VBOXCLIPBOARDCONTEXT *pCtx, uint32_t u32Formats)
|
|---|
| 151 | {
|
|---|
| 152 | RT_NOREF1(pCtx);
|
|---|
| 153 | LogRelFlowFunc(("u32Formats=%d\n", u32Formats));
|
|---|
| 154 | int rc = VbglR3ClipboardReportFormats(g_ctx.client, u32Formats);
|
|---|
| 155 | LogRelFlowFunc(("rc=%Rrc\n", rc));
|
|---|
| 156 | }
|
|---|
| 157 |
|
|---|
| 158 | /** This is called by the backend to tell us that a request for data from
|
|---|
| 159 | * X11 has completed.
|
|---|
| 160 | * @param pCtx Our context information
|
|---|
| 161 | * @param rc the iprt result code of the request
|
|---|
| 162 | * @param pReq the request structure that we passed in when we started
|
|---|
| 163 | * the request. We RTMemFree() this in this function.
|
|---|
| 164 | * @param pv the clipboard data returned from X11 if the request
|
|---|
| 165 | * succeeded (see @a rc)
|
|---|
| 166 | * @param cb the size of the data in @a pv
|
|---|
| 167 | */
|
|---|
| 168 | void ClipCompleteDataRequestFromX11(VBOXCLIPBOARDCONTEXT *pCtx, int rc, CLIPREADCBREQ *pReq, void *pv, uint32_t cb)
|
|---|
| 169 | {
|
|---|
| 170 | RT_NOREF1(pCtx);
|
|---|
| 171 | if (RT_SUCCESS(rc))
|
|---|
| 172 | vboxClipboardSendData(pReq->u32Format, pv, cb);
|
|---|
| 173 | else
|
|---|
| 174 | vboxClipboardSendData(0, NULL, 0);
|
|---|
| 175 | RTMemFree(pReq);
|
|---|
| 176 | }
|
|---|
| 177 |
|
|---|
| 178 | /**
|
|---|
| 179 | * Connect the guest clipboard to the host.
|
|---|
| 180 | *
|
|---|
| 181 | * @returns VBox status code
|
|---|
| 182 | */
|
|---|
| 183 | int vboxClipboardConnect(void)
|
|---|
| 184 | {
|
|---|
| 185 | int rc = VINF_SUCCESS;
|
|---|
| 186 | LogRelFlowFunc(("\n"));
|
|---|
| 187 |
|
|---|
| 188 | /* Sanity */
|
|---|
| 189 | AssertReturn(g_ctx.client == 0, VERR_WRONG_ORDER);
|
|---|
| 190 | g_ctx.pBackend = ClipConstructX11(&g_ctx, false);
|
|---|
| 191 | if (!g_ctx.pBackend)
|
|---|
| 192 | rc = VERR_NO_MEMORY;
|
|---|
| 193 | if (RT_SUCCESS(rc))
|
|---|
| 194 | rc = ClipStartX11(g_ctx.pBackend);
|
|---|
| 195 | if (RT_SUCCESS(rc))
|
|---|
| 196 | {
|
|---|
| 197 | rc = VbglR3ClipboardConnect(&g_ctx.client);
|
|---|
| 198 | if (RT_FAILURE(rc))
|
|---|
| 199 | LogRel(("Error connecting to host. rc=%Rrc\n", rc));
|
|---|
| 200 | else if (!g_ctx.client)
|
|---|
| 201 | {
|
|---|
| 202 | LogRel(("Invalid client ID of 0\n"));
|
|---|
| 203 | rc = VERR_NOT_SUPPORTED;
|
|---|
| 204 | }
|
|---|
| 205 | }
|
|---|
| 206 |
|
|---|
| 207 | if (rc != VINF_SUCCESS && g_ctx.pBackend)
|
|---|
| 208 | ClipDestructX11(g_ctx.pBackend);
|
|---|
| 209 | LogRelFlowFunc(("g_ctx.client=%u rc=%Rrc\n", g_ctx.client, rc));
|
|---|
| 210 | return rc;
|
|---|
| 211 | }
|
|---|
| 212 |
|
|---|
| 213 | /**
|
|---|
| 214 | * The main loop of our clipboard reader.
|
|---|
| 215 | */
|
|---|
| 216 | int vboxClipboardMain(void)
|
|---|
| 217 | {
|
|---|
| 218 | int rc;
|
|---|
| 219 | LogRelFlowFunc(("Starting guest clipboard service\n"));
|
|---|
| 220 | bool fExiting = false;
|
|---|
| 221 |
|
|---|
| 222 | while (!fExiting)
|
|---|
| 223 | {
|
|---|
| 224 | uint32_t Msg;
|
|---|
| 225 | uint32_t fFormats;
|
|---|
| 226 | rc = VbglR3ClipboardGetHostMsg(g_ctx.client, &Msg, &fFormats);
|
|---|
| 227 | if (RT_SUCCESS(rc))
|
|---|
| 228 | {
|
|---|
| 229 | switch (Msg)
|
|---|
| 230 | {
|
|---|
| 231 | case VBOX_SHARED_CLIPBOARD_HOST_MSG_FORMATS:
|
|---|
| 232 | {
|
|---|
| 233 | /* The host has announced available clipboard formats.
|
|---|
| 234 | * Save the information so that it is available for
|
|---|
| 235 | * future requests from guest applications.
|
|---|
| 236 | */
|
|---|
| 237 | LogRelFlowFunc(("VBOX_SHARED_CLIPBOARD_HOST_MSG_FORMATS fFormats=%x\n", fFormats));
|
|---|
| 238 | ClipAnnounceFormatToX11(g_ctx.pBackend, fFormats);
|
|---|
| 239 | break;
|
|---|
| 240 | }
|
|---|
| 241 |
|
|---|
| 242 | case VBOX_SHARED_CLIPBOARD_HOST_MSG_READ_DATA:
|
|---|
| 243 | {
|
|---|
| 244 | /* The host needs data in the specified format. */
|
|---|
| 245 | LogRelFlowFunc(("VBOX_SHARED_CLIPBOARD_HOST_MSG_READ_DATA fFormats=%x\n", fFormats));
|
|---|
| 246 | CLIPREADCBREQ *pReq;
|
|---|
| 247 | pReq = (CLIPREADCBREQ *)RTMemAllocZ(sizeof(*pReq));
|
|---|
| 248 | if (!pReq)
|
|---|
| 249 | {
|
|---|
| 250 | rc = VERR_NO_MEMORY;
|
|---|
| 251 | fExiting = true;
|
|---|
| 252 | }
|
|---|
| 253 | else
|
|---|
| 254 | {
|
|---|
| 255 | pReq->u32Format = fFormats;
|
|---|
| 256 | ClipRequestDataFromX11(g_ctx.pBackend, fFormats,
|
|---|
| 257 | pReq);
|
|---|
| 258 | }
|
|---|
| 259 | break;
|
|---|
| 260 | }
|
|---|
| 261 |
|
|---|
| 262 | case VBOX_SHARED_CLIPBOARD_HOST_MSG_QUIT:
|
|---|
| 263 | {
|
|---|
| 264 | /* The host is terminating. */
|
|---|
| 265 | LogRelFlowFunc(("VBOX_SHARED_CLIPBOARD_HOST_MSG_QUIT\n"));
|
|---|
| 266 | if (RT_SUCCESS(ClipStopX11(g_ctx.pBackend)))
|
|---|
| 267 | ClipDestructX11(g_ctx.pBackend);
|
|---|
| 268 | fExiting = true;
|
|---|
| 269 | break;
|
|---|
| 270 | }
|
|---|
| 271 |
|
|---|
| 272 | default:
|
|---|
| 273 | LogRel2(("Unsupported message from host!!!\n"));
|
|---|
| 274 | }
|
|---|
| 275 | }
|
|---|
| 276 |
|
|---|
| 277 | LogRelFlow(("processed host event rc = %d\n", rc));
|
|---|
| 278 | }
|
|---|
| 279 | LogRelFlowFunc(("rc=%d\n", rc));
|
|---|
| 280 | return rc;
|
|---|
| 281 | }
|
|---|
| 282 |
|
|---|
| 283 | static const char *getPidFilePath()
|
|---|
| 284 | {
|
|---|
| 285 | return ".vboxclient-clipboard.pid";
|
|---|
| 286 | }
|
|---|
| 287 |
|
|---|
| 288 | static int run(struct VBCLSERVICE **ppInterface, bool fDaemonised)
|
|---|
| 289 | {
|
|---|
| 290 | RT_NOREF2(ppInterface, fDaemonised);
|
|---|
| 291 |
|
|---|
| 292 | /* Initialise the guest library. */
|
|---|
| 293 | int rc = VbglR3InitUser();
|
|---|
| 294 | if (RT_FAILURE(rc))
|
|---|
| 295 | VBClFatalError(("Failed to connect to the VirtualBox kernel service, rc=%Rrc\n", rc));
|
|---|
| 296 | rc = vboxClipboardConnect();
|
|---|
| 297 | /* Not RT_SUCCESS: VINF_PERMISSION_DENIED is host service not present. */
|
|---|
| 298 | if (rc == VINF_SUCCESS)
|
|---|
| 299 | rc = vboxClipboardMain();
|
|---|
| 300 | if (rc == VERR_NOT_SUPPORTED)
|
|---|
| 301 | rc = VINF_SUCCESS; /* Prevent automatic restart. */
|
|---|
| 302 | if (RT_FAILURE(rc))
|
|---|
| 303 | LogRelFunc(("guest clipboard service terminated abnormally: return code %Rrc\n", rc));
|
|---|
| 304 | return rc;
|
|---|
| 305 | }
|
|---|
| 306 |
|
|---|
| 307 | static void cleanup(struct VBCLSERVICE **ppInterface)
|
|---|
| 308 | {
|
|---|
| 309 | NOREF(ppInterface);
|
|---|
| 310 | VbglR3Term();
|
|---|
| 311 | }
|
|---|
| 312 |
|
|---|
| 313 | struct VBCLSERVICE vbclClipboardInterface =
|
|---|
| 314 | {
|
|---|
| 315 | getPidFilePath,
|
|---|
| 316 | VBClServiceDefaultHandler, /* init */
|
|---|
| 317 | run,
|
|---|
| 318 | cleanup
|
|---|
| 319 | };
|
|---|
| 320 |
|
|---|
| 321 | struct CLIPBOARDSERVICE
|
|---|
| 322 | {
|
|---|
| 323 | struct VBCLSERVICE *pInterface;
|
|---|
| 324 | };
|
|---|
| 325 |
|
|---|
| 326 | struct VBCLSERVICE **VBClGetClipboardService()
|
|---|
| 327 | {
|
|---|
| 328 | struct CLIPBOARDSERVICE *pService =
|
|---|
| 329 | (struct CLIPBOARDSERVICE *)RTMemAlloc(sizeof(*pService));
|
|---|
| 330 |
|
|---|
| 331 | if (!pService)
|
|---|
| 332 | VBClFatalError(("Out of memory\n"));
|
|---|
| 333 | pService->pInterface = &vbclClipboardInterface;
|
|---|
| 334 | return &pService->pInterface;
|
|---|
| 335 | }
|
|---|
