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freerdp/client/X11/xf_cliprdr.c

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/**
* FreeRDP: A Remote Desktop Protocol Implementation
* X11 Clipboard Redirection
*
* Copyright 2010-2011 Vic Lee
* Copyright 2015 Thincast Technologies GmbH
* Copyright 2015 DI (FH) Martin Haimberger <martin.haimberger@thincast.com>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdlib.h>
#include <X11/Xlib.h>
#include <X11/Xatom.h>
#ifdef WITH_XFIXES
#include <X11/extensions/Xfixes.h>
#endif
#include <winpr/crt.h>
#include <winpr/image.h>
#include <winpr/stream.h>
#include <winpr/clipboard.h>
#include <freerdp/log.h>
#include <freerdp/client/cliprdr.h>
#include <freerdp/channels/channels.h>
#include <freerdp/channels/cliprdr.h>
#include "xf_cliprdr.h"
#define TAG CLIENT_TAG("x11")
#define MAX_CLIPBOARD_FORMATS 255
struct xf_cliprdr_format
{
Atom atom;
UINT32 formatId;
char* formatName;
};
typedef struct xf_cliprdr_format xfCliprdrFormat;
struct xf_clipboard
{
xfContext* xfc;
rdpChannels* channels;
CliprdrClientContext* context;
wClipboard* system;
wClipboardDelegate* delegate;
Window root_window;
Atom clipboard_atom;
Atom property_atom;
Atom timestamp_property_atom;
Time selection_ownership_timestamp;
Atom raw_transfer_atom;
Atom raw_format_list_atom;
int numClientFormats;
xfCliprdrFormat clientFormats[20];
int numServerFormats;
CLIPRDR_FORMAT* serverFormats;
int numTargets;
Atom targets[20];
int requestedFormatId;
BYTE* data;
BYTE* data_raw;
BOOL data_raw_format;
UINT32 data_format_id;
const char* data_format_name;
int data_length;
int data_raw_length;
XSelectionEvent* respond;
Window owner;
BOOL sync;
/* INCR mechanism */
Atom incr_atom;
BOOL incr_starts;
BYTE* incr_data;
int incr_data_length;
/* XFixes extension */
int xfixes_event_base;
int xfixes_error_base;
BOOL xfixes_supported;
/* File clipping */
BOOL streams_supported;
BOOL file_formats_registered;
UINT32 file_capability_flags;
/* last sent data */
CLIPRDR_FORMAT* lastSentFormats;
UINT32 lastSentNumFormats;
};
static UINT xf_cliprdr_send_client_format_list(xfClipboard* clipboard);
static void xf_cliprdr_set_selection_owner(xfContext* xfc, xfClipboard* clipboard, Time timestamp);
static void xf_cliprdr_check_owner(xfClipboard* clipboard)
{
Window owner;
xfContext* xfc = clipboard->xfc;
if (clipboard->sync)
{
owner = XGetSelectionOwner(xfc->display, clipboard->clipboard_atom);
if (clipboard->owner != owner)
{
clipboard->owner = owner;
xf_cliprdr_send_client_format_list(clipboard);
}
}
}
static BOOL xf_cliprdr_is_self_owned(xfClipboard* clipboard)
{
xfContext* xfc = clipboard->xfc;
return XGetSelectionOwner(xfc->display, clipboard->clipboard_atom) == xfc->drawable;
}
static void xf_cliprdr_set_raw_transfer_enabled(xfClipboard* clipboard, BOOL enabled)
{
UINT32 data = enabled;
xfContext* xfc = clipboard->xfc;
XChangeProperty(xfc->display, xfc->drawable, clipboard->raw_transfer_atom, XA_INTEGER, 32,
PropModeReplace, (BYTE*)&data, 1);
}
static BOOL xf_cliprdr_is_raw_transfer_available(xfClipboard* clipboard)
{
Atom type;
int format;
int result = 0;
unsigned long length;
unsigned long bytes_left;
UINT32* data = NULL;
UINT32 is_enabled = 0;
Window owner = None;
xfContext* xfc = clipboard->xfc;
owner = XGetSelectionOwner(xfc->display, clipboard->clipboard_atom);
if (owner != None)
{
result =
XGetWindowProperty(xfc->display, owner, clipboard->raw_transfer_atom, 0, 4, 0,
XA_INTEGER, &type, &format, &length, &bytes_left, (BYTE**)&data);
}
if (data)
{
is_enabled = *data;
XFree(data);
}
if ((owner == None) || (owner == xfc->drawable))
return FALSE;
if (result != Success)
return FALSE;
return is_enabled ? TRUE : FALSE;
}
static BOOL xf_cliprdr_formats_equal(const CLIPRDR_FORMAT* server, const xfCliprdrFormat* client)
{
if (server->formatName && client->formatName)
{
/* The server may be using short format names while we store them in full form. */
return (0 == strncmp(server->formatName, client->formatName, strlen(server->formatName)));
}
if (!server->formatName && !client->formatName)
{
return (server->formatId == client->formatId);
}
return FALSE;
}
static xfCliprdrFormat* xf_cliprdr_get_client_format_by_id(xfClipboard* clipboard, UINT32 formatId)
{
int index;
xfCliprdrFormat* format;
for (index = 0; index < clipboard->numClientFormats; index++)
{
format = &(clipboard->clientFormats[index]);
if (format->formatId == formatId)
return format;
}
return NULL;
}
static xfCliprdrFormat* xf_cliprdr_get_client_format_by_atom(xfClipboard* clipboard, Atom atom)
{
int i;
xfCliprdrFormat* format;
for (i = 0; i < clipboard->numClientFormats; i++)
{
format = &(clipboard->clientFormats[i]);
if (format->atom == atom)
return format;
}
return NULL;
}
static CLIPRDR_FORMAT* xf_cliprdr_get_server_format_by_atom(xfClipboard* clipboard, Atom atom)
{
int i, j;
xfCliprdrFormat* client_format;
CLIPRDR_FORMAT* server_format;
for (i = 0; i < clipboard->numClientFormats; i++)
{
client_format = &(clipboard->clientFormats[i]);
if (client_format->atom == atom)
{
for (j = 0; j < clipboard->numServerFormats; j++)
{
server_format = &(clipboard->serverFormats[j]);
if (xf_cliprdr_formats_equal(server_format, client_format))
return server_format;
}
}
}
return NULL;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT xf_cliprdr_send_data_request(xfClipboard* clipboard, UINT32 formatId)
{
CLIPRDR_FORMAT_DATA_REQUEST request = { 0 };
request.requestedFormatId = formatId;
return clipboard->context->ClientFormatDataRequest(clipboard->context, &request);
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT xf_cliprdr_send_data_response(xfClipboard* clipboard, const BYTE* data, size_t size)
{
CLIPRDR_FORMAT_DATA_RESPONSE response = { 0 };
/* No request currently pending, do not send a response. */
if (clipboard->requestedFormatId < 0)
return CHANNEL_RC_OK;
/* Request handled, reset to invalid */
clipboard->requestedFormatId = -1;
response.msgFlags = (data) ? CB_RESPONSE_OK : CB_RESPONSE_FAIL;
response.dataLen = size;
response.requestedFormatData = data;
return clipboard->context->ClientFormatDataResponse(clipboard->context, &response);
}
static wStream* xf_cliprdr_serialize_server_format_list(xfClipboard* clipboard)
{
UINT32 i;
UINT32 formatCount;
wStream* s = NULL;
/* Typical MS Word format list is about 80 bytes long. */
if (!(s = Stream_New(NULL, 128)))
{
WLog_ERR(TAG, "failed to allocate serialized format list");
goto error;
}
/* If present, the last format is always synthetic CF_RAW. Do not include it. */
formatCount = (clipboard->numServerFormats > 0) ? clipboard->numServerFormats - 1 : 0;
Stream_Write_UINT32(s, formatCount);
for (i = 0; i < formatCount; i++)
{
CLIPRDR_FORMAT* format = &clipboard->serverFormats[i];
size_t name_length = format->formatName ? strlen(format->formatName) : 0;
if (!Stream_EnsureRemainingCapacity(s, sizeof(UINT32) + name_length + 1))
{
WLog_ERR(TAG, "failed to expand serialized format list");
goto error;
}
Stream_Write_UINT32(s, format->formatId);
if (format->formatName)
Stream_Write(s, format->formatName, name_length);
Stream_Write_UINT8(s, '\0');
}
Stream_SealLength(s);
return s;
error:
Stream_Free(s, TRUE);
return NULL;
}
static CLIPRDR_FORMAT* xf_cliprdr_parse_server_format_list(BYTE* data, size_t length,
UINT32* numFormats)
{
UINT32 i;
wStream* s = NULL;
CLIPRDR_FORMAT* formats = NULL;
if (!(s = Stream_New(data, length)))
{
WLog_ERR(TAG, "failed to allocate stream for parsing serialized format list");
goto error;
}
if (Stream_GetRemainingLength(s) < sizeof(UINT32))
{
WLog_ERR(TAG, "too short serialized format list");
goto error;
}
Stream_Read_UINT32(s, *numFormats);
if (*numFormats > MAX_CLIPBOARD_FORMATS)
{
WLog_ERR(TAG, "unexpectedly large number of formats: %" PRIu32 "", *numFormats);
goto error;
}
if (!(formats = (CLIPRDR_FORMAT*)calloc(*numFormats, sizeof(CLIPRDR_FORMAT))))
{
WLog_ERR(TAG, "failed to allocate format list");
goto error;
}
for (i = 0; i < *numFormats; i++)
{
const char* formatName = NULL;
size_t formatNameLength = 0;
if (Stream_GetRemainingLength(s) < sizeof(UINT32))
{
WLog_ERR(TAG, "unexpected end of serialized format list");
goto error;
}
Stream_Read_UINT32(s, formats[i].formatId);
formatName = (const char*)Stream_Pointer(s);
formatNameLength = strnlen(formatName, Stream_GetRemainingLength(s));
if (formatNameLength == Stream_GetRemainingLength(s))
{
WLog_ERR(TAG, "missing terminating null byte, %" PRIuz " bytes left to read",
formatNameLength);
goto error;
}
formats[i].formatName = strndup(formatName, formatNameLength);
Stream_Seek(s, formatNameLength + 1);
}
Stream_Free(s, FALSE);
return formats;
error:
Stream_Free(s, FALSE);
free(formats);
*numFormats = 0;
return NULL;
}
static void xf_cliprdr_free_formats(CLIPRDR_FORMAT* formats, UINT32 numFormats)
{
UINT32 i;
for (i = 0; i < numFormats; i++)
{
free(formats[i].formatName);
}
free(formats);
}
static CLIPRDR_FORMAT* xf_cliprdr_get_raw_server_formats(xfClipboard* clipboard, UINT32* numFormats)
{
Atom type = None;
int format = 0;
unsigned long length = 0;
unsigned long remaining;
BYTE* data = NULL;
CLIPRDR_FORMAT* formats = NULL;
xfContext* xfc = clipboard->xfc;
*numFormats = 0;
XGetWindowProperty(xfc->display, clipboard->owner, clipboard->raw_format_list_atom, 0, 4096,
False, clipboard->raw_format_list_atom, &type, &format, &length, &remaining,
&data);
if (data && length > 0 && format == 8 && type == clipboard->raw_format_list_atom)
{
formats = xf_cliprdr_parse_server_format_list(data, length, numFormats);
}
else
{
WLog_ERR(TAG,
"failed to retrieve raw format list: data=%p, length=%lu, format=%d, type=%lu "
"(expected=%lu)",
(void*)data, length, format, (unsigned long)type,
(unsigned long)clipboard->raw_format_list_atom);
}
if (data)
XFree(data);
return formats;
}
static CLIPRDR_FORMAT* xf_cliprdr_get_formats_from_targets(xfClipboard* clipboard,
UINT32* numFormats)
{
unsigned long i;
Atom atom;
BYTE* data = NULL;
int format_property;
unsigned long length;
unsigned long bytes_left;
xfCliprdrFormat* format = NULL;
CLIPRDR_FORMAT* formats = NULL;
xfContext* xfc = clipboard->xfc;
*numFormats = 0;
XGetWindowProperty(xfc->display, xfc->drawable, clipboard->property_atom, 0, 200, 0, XA_ATOM,
&atom, &format_property, &length, &bytes_left, &data);
if (length > 0)
{
if (!data)
{
WLog_ERR(TAG, "XGetWindowProperty set length = %lu but data is NULL", length);
goto out;
}
if (!(formats = (CLIPRDR_FORMAT*)calloc(length, sizeof(CLIPRDR_FORMAT))))
{
WLog_ERR(TAG, "failed to allocate %lu CLIPRDR_FORMAT structs", length);
goto out;
}
}
for (i = 0; i < length; i++)
{
atom = ((Atom*)data)[i];
format = xf_cliprdr_get_client_format_by_atom(clipboard, atom);
if (format)
{
formats[*numFormats].formatId = format->formatId;
formats[*numFormats].formatName = _strdup(format->formatName);
*numFormats += 1;
}
}
out:
if (data)
XFree(data);
return formats;
}
static CLIPRDR_FORMAT* xf_cliprdr_get_client_formats(xfClipboard* clipboard, UINT32* numFormats)
{
CLIPRDR_FORMAT* formats = NULL;
*numFormats = 0;
if (xf_cliprdr_is_raw_transfer_available(clipboard))
{
formats = xf_cliprdr_get_raw_server_formats(clipboard, numFormats);
}
if (*numFormats == 0)
{
xf_cliprdr_free_formats(formats, *numFormats);
formats = xf_cliprdr_get_formats_from_targets(clipboard, numFormats);
}
return formats;
}
static void xf_cliprdr_provide_server_format_list(xfClipboard* clipboard)
{
wStream* formats = NULL;
xfContext* xfc = clipboard->xfc;
formats = xf_cliprdr_serialize_server_format_list(clipboard);
if (formats)
{
XChangeProperty(xfc->display, xfc->drawable, clipboard->raw_format_list_atom,
clipboard->raw_format_list_atom, 8, PropModeReplace, Stream_Buffer(formats),
Stream_Length(formats));
}
else
{
XDeleteProperty(xfc->display, xfc->drawable, clipboard->raw_format_list_atom);
}
Stream_Free(formats, TRUE);
}
static BOOL xf_clipboard_format_equal(const CLIPRDR_FORMAT* a, const CLIPRDR_FORMAT* b)
{
if (a->formatId != b->formatId)
return FALSE;
if (!a->formatName && !b->formatName)
return TRUE;
return strcmp(a->formatName, b->formatName) == 0;
}
static BOOL xf_clipboard_changed(xfClipboard* clipboard, const CLIPRDR_FORMAT* formats,
UINT32 numFormats)
{
UINT32 x, y;
if (clipboard->lastSentNumFormats != numFormats)
return TRUE;
for (x = 0; x < numFormats; x++)
{
const CLIPRDR_FORMAT* cur = &clipboard->lastSentFormats[x];
BOOL contained = FALSE;
for (y = 0; y < numFormats; y++)
{
if (xf_clipboard_format_equal(cur, &formats[y]))
{
contained = TRUE;
break;
}
}
if (!contained)
return TRUE;
}
return FALSE;
}
static void xf_clipboard_formats_free(xfClipboard* clipboard)
{
xf_cliprdr_free_formats(clipboard->lastSentFormats, clipboard->lastSentNumFormats);
clipboard->lastSentFormats = NULL;
clipboard->lastSentNumFormats = 0;
}
static BOOL xf_clipboard_copy_formats(xfClipboard* clipboard, const CLIPRDR_FORMAT* formats,
UINT32 numFormats)
{
UINT32 x;
xf_clipboard_formats_free(clipboard);
clipboard->lastSentFormats = calloc(numFormats, sizeof(CLIPRDR_FORMAT));
if (!clipboard->lastSentFormats)
return FALSE;
clipboard->lastSentNumFormats = numFormats;
for (x = 0; x < numFormats; x++)
{
CLIPRDR_FORMAT* lcur = &clipboard->lastSentFormats[x];
const CLIPRDR_FORMAT* cur = &formats[x];
*lcur = *cur;
if (cur->formatName)
lcur->formatName = _strdup(cur->formatName);
}
return FALSE;
}
static UINT xf_cliprdr_send_format_list(xfClipboard* clipboard, const CLIPRDR_FORMAT* formats,
UINT32 numFormats)
{
CLIPRDR_FORMAT_LIST formatList = { 0 };
formatList.msgFlags = CB_RESPONSE_OK;
formatList.numFormats = numFormats;
formatList.formats = (CLIPRDR_FORMAT*)formats;
formatList.msgType = CB_FORMAT_LIST;
if (!xf_clipboard_changed(clipboard, formats, numFormats))
return CHANNEL_RC_OK;
xf_clipboard_copy_formats(clipboard, formats, numFormats);
/* Ensure all pending requests are answered. */
xf_cliprdr_send_data_response(clipboard, NULL, 0);
return clipboard->context->ClientFormatList(clipboard->context, &formatList);
}
static void xf_cliprdr_get_requested_targets(xfClipboard* clipboard)
{
UINT32 numFormats = 0;
CLIPRDR_FORMAT* formats = NULL;
formats = xf_cliprdr_get_client_formats(clipboard, &numFormats);
xf_cliprdr_send_format_list(clipboard, formats, numFormats);
xf_cliprdr_free_formats(formats, numFormats);
}
static void xf_cliprdr_process_requested_data(xfClipboard* clipboard, BOOL hasData, BYTE* data,
int size)
{
BOOL bSuccess;
UINT32 SrcSize;
UINT32 DstSize;
UINT32 srcFormatId;
UINT32 dstFormatId;
BYTE* pDstData = NULL;
xfCliprdrFormat* format;
if (clipboard->incr_starts && hasData)
return;
format = xf_cliprdr_get_client_format_by_id(clipboard, clipboard->requestedFormatId);
if (!hasData || !data || !format)
{
xf_cliprdr_send_data_response(clipboard, NULL, 0);
return;
}
srcFormatId = 0;
switch (format->formatId)
{
case CF_RAW:
srcFormatId = CF_RAW;
break;
case CF_TEXT:
case CF_OEMTEXT:
case CF_UNICODETEXT:
size = strlen((char*)data) + 1;
srcFormatId = ClipboardGetFormatId(clipboard->system, "UTF8_STRING");
break;
case CF_DIB:
srcFormatId = ClipboardGetFormatId(clipboard->system, "image/bmp");
break;
case CB_FORMAT_HTML:
srcFormatId = ClipboardGetFormatId(clipboard->system, "text/html");
break;
case CB_FORMAT_TEXTURILIST:
srcFormatId = ClipboardGetFormatId(clipboard->system, "text/uri-list");
break;
}
SrcSize = (UINT32)size;
bSuccess = ClipboardSetData(clipboard->system, srcFormatId, data, SrcSize);
if (format->formatName)
dstFormatId = ClipboardGetFormatId(clipboard->system, format->formatName);
else
dstFormatId = format->formatId;
if (bSuccess)
{
DstSize = 0;
pDstData = (BYTE*)ClipboardGetData(clipboard->system, dstFormatId, &DstSize);
}
if (!pDstData)
{
xf_cliprdr_send_data_response(clipboard, NULL, 0);
return;
}
/*
* File lists require a bit of postprocessing to convert them from WinPR's FILDESCRIPTOR
* format to CLIPRDR_FILELIST expected by the server.
*
* We check for "FileGroupDescriptorW" format being registered (i.e., nonzero) in order
* to not process CF_RAW as a file list in case WinPR does not support file transfers.
*/
if (dstFormatId &&
(dstFormatId == ClipboardGetFormatId(clipboard->system, "FileGroupDescriptorW")))
{
UINT error = NO_ERROR;
FILEDESCRIPTORW* file_array = (FILEDESCRIPTORW*)pDstData;
UINT32 file_count = DstSize / sizeof(FILEDESCRIPTORW);
pDstData = NULL;
DstSize = 0;
error = cliprdr_serialize_file_list_ex(clipboard->file_capability_flags, file_array,
file_count, &pDstData, &DstSize);
if (error)
WLog_ERR(TAG, "failed to serialize CLIPRDR_FILELIST: 0x%08X", error);
free(file_array);
}
xf_cliprdr_send_data_response(clipboard, pDstData, DstSize);
free(pDstData);
}
static BOOL xf_cliprdr_get_requested_data(xfClipboard* clipboard, Atom target)
{
Atom type;
BYTE* data = NULL;
BOOL has_data = FALSE;
int format_property;
unsigned long dummy;
unsigned long length;
unsigned long bytes_left;
xfCliprdrFormat* format;
xfContext* xfc = clipboard->xfc;
format = xf_cliprdr_get_client_format_by_id(clipboard, clipboard->requestedFormatId);
if (!format || (format->atom != target))
{
xf_cliprdr_send_data_response(clipboard, NULL, 0);
return FALSE;
}
XGetWindowProperty(xfc->display, xfc->drawable, clipboard->property_atom, 0, 0, 0, target,
&type, &format_property, &length, &bytes_left, &data);
if (data)
{
XFree(data);
data = NULL;
}
if (bytes_left <= 0 && !clipboard->incr_starts)
{
}
else if (type == clipboard->incr_atom)
{
clipboard->incr_starts = TRUE;
if (clipboard->incr_data)
{
free(clipboard->incr_data);
clipboard->incr_data = NULL;
}
clipboard->incr_data_length = 0;
has_data = TRUE; /* data will be followed in PropertyNotify event */
}
else
{
if (bytes_left <= 0)
{
/* INCR finish */
data = clipboard->incr_data;
clipboard->incr_data = NULL;
bytes_left = clipboard->incr_data_length;
clipboard->incr_data_length = 0;
clipboard->incr_starts = 0;
has_data = TRUE;
}
else if (XGetWindowProperty(xfc->display, xfc->drawable, clipboard->property_atom, 0,
bytes_left, 0, target, &type, &format_property, &length, &dummy,
&data) == Success)
{
if (clipboard->incr_starts)
{
BYTE* new_data;
bytes_left = length * format_property / 8;
new_data =
(BYTE*)realloc(clipboard->incr_data, clipboard->incr_data_length + bytes_left);
if (new_data)
{
clipboard->incr_data = new_data;
CopyMemory(clipboard->incr_data + clipboard->incr_data_length, data,
bytes_left);
clipboard->incr_data_length += bytes_left;
XFree(data);
data = NULL;
}
}
has_data = TRUE;
}
else
{
}
}
XDeleteProperty(xfc->display, xfc->drawable, clipboard->property_atom);
xf_cliprdr_process_requested_data(clipboard, has_data, data, bytes_left);
if (data)
XFree(data);
return TRUE;
}
static void xf_cliprdr_append_target(xfClipboard* clipboard, Atom target)
{
int i;
if (clipboard->numTargets < 0)
return;
if ((size_t)clipboard->numTargets >= ARRAYSIZE(clipboard->targets))
return;
for (i = 0; i < clipboard->numTargets; i++)
{
if (clipboard->targets[i] == target)
return;
}
clipboard->targets[clipboard->numTargets++] = target;
}
static void xf_cliprdr_provide_targets(xfClipboard* clipboard, const XSelectionEvent* respond)
{
xfContext* xfc = clipboard->xfc;
if (respond->property != None)
{
XChangeProperty(xfc->display, respond->requestor, respond->property, XA_ATOM, 32,
PropModeReplace, (BYTE*)clipboard->targets, clipboard->numTargets);
}
}
static void xf_cliprdr_provide_timestamp(xfClipboard* clipboard, const XSelectionEvent* respond)
{
xfContext* xfc = clipboard->xfc;
if (respond->property != None)
{
XChangeProperty(xfc->display, respond->requestor, respond->property, XA_INTEGER, 32,
PropModeReplace, (BYTE*)&clipboard->selection_ownership_timestamp, 1);
}
}
static void xf_cliprdr_provide_data(xfClipboard* clipboard, const XSelectionEvent* respond,
const BYTE* data, UINT32 size)
{
xfContext* xfc = clipboard->xfc;
if (respond->property != None)
{
XChangeProperty(xfc->display, respond->requestor, respond->property, respond->target, 8,
PropModeReplace, data, size);
}
}
static BOOL xf_cliprdr_process_selection_notify(xfClipboard* clipboard,
const XSelectionEvent* xevent)
{
if (xevent->target == clipboard->targets[1])
{
if (xevent->property == None)
{
xf_cliprdr_send_client_format_list(clipboard);
}
else
{
xf_cliprdr_get_requested_targets(clipboard);
}
return TRUE;
}
else
{
return xf_cliprdr_get_requested_data(clipboard, xevent->target);
}
}
static void xf_cliprdr_clear_cached_data(xfClipboard* clipboard)
{
if (clipboard->data)
{
free(clipboard->data);
clipboard->data = NULL;
}
clipboard->data_length = 0;
if (clipboard->data_raw)
{
free(clipboard->data_raw);
clipboard->data_raw = NULL;
}
clipboard->data_raw_length = 0;
}
static BOOL xf_cliprdr_process_selection_request(xfClipboard* clipboard,
const XSelectionRequestEvent* xevent)
{
int fmt;
Atom type;
UINT32 formatId;
const char* formatName;
XSelectionEvent* respond;
BYTE* data = NULL;
BOOL delayRespond;
BOOL rawTransfer;
BOOL matchingFormat;
unsigned long length;
unsigned long bytes_left;
CLIPRDR_FORMAT* format;
xfContext* xfc = clipboard->xfc;
if (xevent->owner != xfc->drawable)
return FALSE;
delayRespond = FALSE;
if (!(respond = (XSelectionEvent*)calloc(1, sizeof(XSelectionEvent))))
{
WLog_ERR(TAG, "failed to allocate XEvent data");
return FALSE;
}
respond->property = None;
respond->type = SelectionNotify;
respond->display = xevent->display;
respond->requestor = xevent->requestor;
respond->selection = xevent->selection;
respond->target = xevent->target;
respond->time = xevent->time;
if (xevent->target == clipboard->targets[0]) /* TIMESTAMP */
{
/* Someone else requests the selection's timestamp */
respond->property = xevent->property;
xf_cliprdr_provide_timestamp(clipboard, respond);
}
else if (xevent->target == clipboard->targets[1]) /* TARGETS */
{
/* Someone else requests our available formats */
respond->property = xevent->property;
xf_cliprdr_provide_targets(clipboard, respond);
}
else
{
format = xf_cliprdr_get_server_format_by_atom(clipboard, xevent->target);
if (format && (xevent->requestor != xfc->drawable))
{
formatId = format->formatId;
formatName = format->formatName;
rawTransfer = FALSE;
if (formatId == CF_RAW)
{
if (XGetWindowProperty(xfc->display, xevent->requestor, clipboard->property_atom, 0,
4, 0, XA_INTEGER, &type, &fmt, &length, &bytes_left,
&data) != Success)
{
}
if (data)
{
rawTransfer = TRUE;
CopyMemory(&formatId, data, 4);
XFree(data);
}
}
/* We can compare format names by pointer value here as they are both
* taken from the same clipboard->serverFormats array */
matchingFormat = (formatId == clipboard->data_format_id) &&
(formatName == clipboard->data_format_name);
if (matchingFormat && (clipboard->data != 0) && !rawTransfer)
{
/* Cached converted clipboard data available. Send it now */
respond->property = xevent->property;
xf_cliprdr_provide_data(clipboard, respond, clipboard->data,
clipboard->data_length);
}
else if (matchingFormat && (clipboard->data_raw != 0) && rawTransfer)
{
/* Cached raw clipboard data available. Send it now */
respond->property = xevent->property;
xf_cliprdr_provide_data(clipboard, respond, clipboard->data_raw,
clipboard->data_raw_length);
}
else if (clipboard->respond)
{
/* duplicate request */
}
else
{
/**
* Send clipboard data request to the server.
* Response will be postponed after receiving the data
*/
xf_cliprdr_clear_cached_data(clipboard);
respond->property = xevent->property;
clipboard->respond = respond;
clipboard->data_format_id = formatId;
clipboard->data_format_name = formatName;
clipboard->data_raw_format = rawTransfer;
delayRespond = TRUE;
xf_cliprdr_send_data_request(clipboard, formatId);
}
}
}
if (!delayRespond)
{
union
{
XEvent* ev;
XSelectionEvent* sev;
} conv;
conv.sev = respond;
XSendEvent(xfc->display, xevent->requestor, 0, 0, conv.ev);
XFlush(xfc->display);
free(respond);
}
return TRUE;
}
static BOOL xf_cliprdr_process_selection_clear(xfClipboard* clipboard,
const XSelectionClearEvent* xevent)
{
xfContext* xfc = clipboard->xfc;
WINPR_UNUSED(xevent);
if (xf_cliprdr_is_self_owned(clipboard))
return FALSE;
XDeleteProperty(xfc->display, clipboard->root_window, clipboard->property_atom);
return TRUE;
}
static BOOL xf_cliprdr_process_property_notify(xfClipboard* clipboard, const XPropertyEvent* xevent)
{
xfCliprdrFormat* format;
xfContext* xfc = NULL;
if (!clipboard)
return TRUE;
xfc = clipboard->xfc;
if (xevent->atom == clipboard->timestamp_property_atom)
{
/* This is the response to the property change we did
* in xf_cliprdr_prepare_to_set_selection_owner. Now
* we can set ourselves as the selection owner. (See
* comments in those functions below.) */
xf_cliprdr_set_selection_owner(xfc, clipboard, xevent->time);
return TRUE;
}
if (xevent->atom != clipboard->property_atom)
return FALSE; /* Not cliprdr-related */
if (xevent->window == clipboard->root_window)
{
xf_cliprdr_send_client_format_list(clipboard);
}
else if ((xevent->window == xfc->drawable) && (xevent->state == PropertyNewValue) &&
clipboard->incr_starts)
{
format = xf_cliprdr_get_client_format_by_id(clipboard, clipboard->requestedFormatId);
if (format)
xf_cliprdr_get_requested_data(clipboard, format->atom);
}
return TRUE;
}
void xf_cliprdr_handle_xevent(xfContext* xfc, const XEvent* event)
{
xfClipboard* clipboard;
if (!xfc || !event)
return;
clipboard = xfc->clipboard;
if (!clipboard)
return;
#ifdef WITH_XFIXES
if (clipboard->xfixes_supported &&
event->type == XFixesSelectionNotify + clipboard->xfixes_event_base)
{
XFixesSelectionNotifyEvent* se = (XFixesSelectionNotifyEvent*)event;
if (se->subtype == XFixesSetSelectionOwnerNotify)
{
if (se->selection != clipboard->clipboard_atom)
return;
if (XGetSelectionOwner(xfc->display, se->selection) == xfc->drawable)
return;
clipboard->owner = None;
xf_cliprdr_check_owner(clipboard);
}
return;
}
#endif
switch (event->type)
{
case SelectionNotify:
xf_cliprdr_process_selection_notify(clipboard, &event->xselection);
break;
case SelectionRequest:
xf_cliprdr_process_selection_request(clipboard, &event->xselectionrequest);
break;
case SelectionClear:
xf_cliprdr_process_selection_clear(clipboard, &event->xselectionclear);
break;
case PropertyNotify:
xf_cliprdr_process_property_notify(clipboard, &event->xproperty);
break;
case FocusIn:
if (!clipboard->xfixes_supported)
{
xf_cliprdr_check_owner(clipboard);
}
break;
}
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT xf_cliprdr_send_client_capabilities(xfClipboard* clipboard)
{
CLIPRDR_CAPABILITIES capabilities;
CLIPRDR_GENERAL_CAPABILITY_SET generalCapabilitySet;
capabilities.cCapabilitiesSets = 1;
capabilities.capabilitySets = (CLIPRDR_CAPABILITY_SET*)&(generalCapabilitySet);
generalCapabilitySet.capabilitySetType = CB_CAPSTYPE_GENERAL;
generalCapabilitySet.capabilitySetLength = 12;
generalCapabilitySet.version = CB_CAPS_VERSION_2;
generalCapabilitySet.generalFlags = CB_USE_LONG_FORMAT_NAMES;
if (clipboard->streams_supported && clipboard->file_formats_registered)
generalCapabilitySet.generalFlags |=
CB_STREAM_FILECLIP_ENABLED | CB_FILECLIP_NO_FILE_PATHS | CB_HUGE_FILE_SUPPORT_ENABLED;
clipboard->file_capability_flags = generalCapabilitySet.generalFlags;
return clipboard->context->ClientCapabilities(clipboard->context, &capabilities);
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT xf_cliprdr_send_client_format_list(xfClipboard* clipboard)
{
UINT32 i, numFormats;
CLIPRDR_FORMAT* formats = NULL;
xfContext* xfc = clipboard->xfc;
UINT ret;
numFormats = clipboard->numClientFormats;
if (numFormats)
{
if (!(formats = (CLIPRDR_FORMAT*)calloc(numFormats, sizeof(CLIPRDR_FORMAT))))
{
WLog_ERR(TAG, "failed to allocate %" PRIu32 " CLIPRDR_FORMAT structs", numFormats);
return CHANNEL_RC_NO_MEMORY;
}
}
for (i = 0; i < numFormats; i++)
{
formats[i].formatId = clipboard->clientFormats[i].formatId;
formats[i].formatName = clipboard->clientFormats[i].formatName;
}
ret = xf_cliprdr_send_format_list(clipboard, formats, numFormats);
free(formats);
if (clipboard->owner && clipboard->owner != xfc->drawable)
{
/* Request the owner for TARGETS, and wait for SelectionNotify event */
XConvertSelection(xfc->display, clipboard->clipboard_atom, clipboard->targets[1],
clipboard->property_atom, xfc->drawable, CurrentTime);
}
return ret;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT xf_cliprdr_send_client_format_list_response(xfClipboard* clipboard, BOOL status)
{
CLIPRDR_FORMAT_LIST_RESPONSE formatListResponse;
formatListResponse.msgType = CB_FORMAT_LIST_RESPONSE;
formatListResponse.msgFlags = status ? CB_RESPONSE_OK : CB_RESPONSE_FAIL;
formatListResponse.dataLen = 0;
return clipboard->context->ClientFormatListResponse(clipboard->context, &formatListResponse);
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT xf_cliprdr_monitor_ready(CliprdrClientContext* context,
const CLIPRDR_MONITOR_READY* monitorReady)
{
xfClipboard* clipboard = (xfClipboard*)context->custom;
UINT ret;
WINPR_UNUSED(monitorReady);
if ((ret = xf_cliprdr_send_client_capabilities(clipboard)) != CHANNEL_RC_OK)
return ret;
if ((ret = xf_cliprdr_send_client_format_list(clipboard)) != CHANNEL_RC_OK)
return ret;
clipboard->sync = TRUE;
return CHANNEL_RC_OK;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT xf_cliprdr_server_capabilities(CliprdrClientContext* context,
const CLIPRDR_CAPABILITIES* capabilities)
{
UINT32 i;
const CLIPRDR_CAPABILITY_SET* caps;
const CLIPRDR_GENERAL_CAPABILITY_SET* generalCaps;
const BYTE* capsPtr = (const BYTE*)capabilities->capabilitySets;
xfClipboard* clipboard = (xfClipboard*)context->custom;
clipboard->streams_supported = FALSE;
for (i = 0; i < capabilities->cCapabilitiesSets; i++)
{
caps = (const CLIPRDR_CAPABILITY_SET*)capsPtr;
if (caps->capabilitySetType == CB_CAPSTYPE_GENERAL)
{
generalCaps = (const CLIPRDR_GENERAL_CAPABILITY_SET*)caps;
if (generalCaps->generalFlags & CB_STREAM_FILECLIP_ENABLED)
{
clipboard->streams_supported = TRUE;
}
}
capsPtr += caps->capabilitySetLength;
}
return CHANNEL_RC_OK;
}
static void xf_cliprdr_prepare_to_set_selection_owner(xfContext* xfc, xfClipboard* clipboard)
{
/*
* When you're writing to the selection in response to a
* normal X event like a mouse click or keyboard action, you
* get the selection timestamp by copying the time field out
* of that X event. Here, we're doing it on our own
* initiative, so we have to _request_ the X server time.
*
* There isn't a GetServerTime request in the X protocol, so I
* work around it by setting a property on our own window, and
* waiting for a PropertyNotify event to come back telling me
* it's been done - which will have a timestamp we can use.
*/
/* We have to set the property to some value, but it doesn't
* matter what. Set it to its own name, which we have here
* anyway! */
Atom value = clipboard->timestamp_property_atom;
XChangeProperty(xfc->display, xfc->drawable, clipboard->timestamp_property_atom, XA_ATOM, 32,
PropModeReplace, (BYTE*)&value, 1);
XFlush(xfc->display);
}
static void xf_cliprdr_set_selection_owner(xfContext* xfc, xfClipboard* clipboard, Time timestamp)
{
/*
* Actually set ourselves up as the selection owner, now that
* we have a timestamp to use.
*/
clipboard->selection_ownership_timestamp = timestamp;
XSetSelectionOwner(xfc->display, clipboard->clipboard_atom, xfc->drawable, timestamp);
XFlush(xfc->display);
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT xf_cliprdr_server_format_list(CliprdrClientContext* context,
const CLIPRDR_FORMAT_LIST* formatList)
{
UINT32 i;
int j;
xfClipboard* clipboard = (xfClipboard*)context->custom;
xfContext* xfc = clipboard->xfc;
UINT ret;
xf_clipboard_formats_free(clipboard);
xf_cliprdr_clear_cached_data(clipboard);
clipboard->data_format_id = -1;
clipboard->data_format_name = NULL;
if (clipboard->serverFormats)
{
for (j = 0; j < clipboard->numServerFormats; j++)
free(clipboard->serverFormats[j].formatName);
free(clipboard->serverFormats);
clipboard->serverFormats = NULL;
clipboard->numServerFormats = 0;
}
clipboard->numServerFormats = formatList->numFormats + 1; /* +1 for CF_RAW */
if (!(clipboard->serverFormats =
(CLIPRDR_FORMAT*)calloc(clipboard->numServerFormats, sizeof(CLIPRDR_FORMAT))))
{
WLog_ERR(TAG, "failed to allocate %d CLIPRDR_FORMAT structs", clipboard->numServerFormats);
return CHANNEL_RC_NO_MEMORY;
}
for (i = 0; i < formatList->numFormats; i++)
{
CLIPRDR_FORMAT* format = &formatList->formats[i];
clipboard->serverFormats[i].formatId = format->formatId;
if (format->formatName)
{
clipboard->serverFormats[i].formatName = _strdup(format->formatName);
if (!clipboard->serverFormats[i].formatName)
{
UINT32 k;
for (k = 0; k < i; k++)
free(clipboard->serverFormats[k].formatName);
clipboard->numServerFormats = 0;
free(clipboard->serverFormats);
clipboard->serverFormats = NULL;
return CHANNEL_RC_NO_MEMORY;
}
}
}
/* CF_RAW is always implicitly supported by the server */
{
CLIPRDR_FORMAT* format = &clipboard->serverFormats[formatList->numFormats];
format->formatId = CF_RAW;
format->formatName = NULL;
}
xf_cliprdr_provide_server_format_list(clipboard);
clipboard->numTargets = 2;
for (i = 0; i < formatList->numFormats; i++)
{
CLIPRDR_FORMAT* format = &formatList->formats[i];
for (j = 0; j < clipboard->numClientFormats; j++)
{
if (xf_cliprdr_formats_equal(format, &clipboard->clientFormats[j]))
{
xf_cliprdr_append_target(clipboard, clipboard->clientFormats[j].atom);
}
}
}
ret = xf_cliprdr_send_client_format_list_response(clipboard, TRUE);
if (xfc->remote_app)
xf_cliprdr_set_selection_owner(xfc, clipboard, CurrentTime);
else
xf_cliprdr_prepare_to_set_selection_owner(xfc, clipboard);
return ret;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT
xf_cliprdr_server_format_list_response(CliprdrClientContext* context,
const CLIPRDR_FORMAT_LIST_RESPONSE* formatListResponse)
{
// xfClipboard* clipboard = (xfClipboard*) context->custom;
return CHANNEL_RC_OK;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT
xf_cliprdr_server_format_data_request(CliprdrClientContext* context,
const CLIPRDR_FORMAT_DATA_REQUEST* formatDataRequest)
{
BOOL rawTransfer;
xfCliprdrFormat* format = NULL;
UINT32 formatId = formatDataRequest->requestedFormatId;
xfClipboard* clipboard = (xfClipboard*)context->custom;
xfContext* xfc = clipboard->xfc;
rawTransfer = xf_cliprdr_is_raw_transfer_available(clipboard);
if (rawTransfer)
{
format = xf_cliprdr_get_client_format_by_id(clipboard, CF_RAW);
XChangeProperty(xfc->display, xfc->drawable, clipboard->property_atom, XA_INTEGER, 32,
PropModeReplace, (BYTE*)&formatId, 1);
}
else
format = xf_cliprdr_get_client_format_by_id(clipboard, formatId);
clipboard->requestedFormatId = rawTransfer ? CF_RAW : formatId;
if (!format)
return xf_cliprdr_send_data_response(clipboard, NULL, 0);
XConvertSelection(xfc->display, clipboard->clipboard_atom, format->atom,
clipboard->property_atom, xfc->drawable, CurrentTime);
XFlush(xfc->display);
/* After this point, we expect a SelectionNotify event from the clipboard owner. */
return CHANNEL_RC_OK;
}
/**
* Function description
*
* @return 0 on success, otherwise a Win32 error code
*/
static UINT
xf_cliprdr_server_format_data_response(CliprdrClientContext* context,
const CLIPRDR_FORMAT_DATA_RESPONSE* formatDataResponse)
{
BOOL bSuccess;
BYTE* pDstData;
UINT32 DstSize;
UINT32 SrcSize;
UINT32 srcFormatId;
UINT32 dstFormatId;
BOOL nullTerminated = FALSE;
UINT32 size = formatDataResponse->dataLen;
const BYTE* data = formatDataResponse->requestedFormatData;
xfClipboard* clipboard = (xfClipboard*)context->custom;
xfContext* xfc = clipboard->xfc;
if (!clipboard->respond)
return CHANNEL_RC_OK;
xf_cliprdr_clear_cached_data(clipboard);
pDstData = NULL;
DstSize = 0;
srcFormatId = 0;
dstFormatId = 0;
if (clipboard->data_raw_format)
{
srcFormatId = CF_RAW;
dstFormatId = CF_RAW;
}
else if (clipboard->data_format_name)
{
if (strcmp(clipboard->data_format_name, "HTML Format") == 0)
{
srcFormatId = ClipboardGetFormatId(clipboard->system, "HTML Format");
dstFormatId = ClipboardGetFormatId(clipboard->system, "text/html");
nullTerminated = TRUE;
}
if (strcmp(clipboard->data_format_name, "FileGroupDescriptorW") == 0)
{
srcFormatId = ClipboardGetFormatId(clipboard->system, "FileGroupDescriptorW");
dstFormatId = ClipboardGetFormatId(clipboard->system, "text/uri-list");
nullTerminated = FALSE;
}
}
else
{
switch (clipboard->data_format_id)
{
case CF_TEXT:
srcFormatId = CF_TEXT;
dstFormatId = ClipboardGetFormatId(clipboard->system, "UTF8_STRING");
nullTerminated = TRUE;
break;
case CF_OEMTEXT:
srcFormatId = CF_OEMTEXT;
dstFormatId = ClipboardGetFormatId(clipboard->system, "UTF8_STRING");
nullTerminated = TRUE;
break;
case CF_UNICODETEXT:
srcFormatId = CF_UNICODETEXT;
dstFormatId = ClipboardGetFormatId(clipboard->system, "UTF8_STRING");
nullTerminated = TRUE;
break;
case CF_DIB:
srcFormatId = CF_DIB;
dstFormatId = ClipboardGetFormatId(clipboard->system, "image/bmp");
break;
default:
break;
}
}
SrcSize = (UINT32)size;
bSuccess = ClipboardSetData(clipboard->system, srcFormatId, data, SrcSize);
if (bSuccess)
{
if (SrcSize == 0)
{
WLog_DBG(TAG, "skipping, empty data detected!");
free(clipboard->respond);
clipboard->respond = NULL;
return CHANNEL_RC_OK;
}
pDstData = (BYTE*)ClipboardGetData(clipboard->system, dstFormatId, &DstSize);
if (!pDstData)
{
WLog_WARN(TAG, "failed to get clipboard data in format %s [source format %s]",
ClipboardGetFormatName(clipboard->system, dstFormatId),
ClipboardGetFormatName(clipboard->system, srcFormatId));
}
if (nullTerminated && pDstData)
{
BYTE* nullTerminator = memchr(pDstData, '\0', DstSize);
if (nullTerminator)
DstSize = nullTerminator - pDstData;
}
}
/* Cache converted and original data to avoid doing a possibly costly
* conversion again on subsequent requests */
clipboard->data = pDstData;
clipboard->data_length = DstSize;
/* We have to copy the original data again, as pSrcData is now owned
* by clipboard->system. Memory allocation failure is not fatal here
* as this is only a cached value. */
clipboard->data_raw = (BYTE*)malloc(size);
if (clipboard->data_raw)
{
CopyMemory(clipboard->data_raw, data, size);
clipboard->data_raw_length = size;
}
else
{
WLog_WARN(TAG, "failed to allocate %" PRIu32 " bytes for a copy of raw clipboard data",
size);
}
xf_cliprdr_provide_data(clipboard, clipboard->respond, pDstData, DstSize);
{
union
{
XEvent* ev;
XSelectionEvent* sev;
} conv;
conv.sev = clipboard->respond;
XSendEvent(xfc->display, clipboard->respond->requestor, 0, 0, conv.ev);
XFlush(xfc->display);
}
free(clipboard->respond);
clipboard->respond = NULL;
return CHANNEL_RC_OK;
}
static UINT
xf_cliprdr_server_file_size_request(xfClipboard* clipboard,
const CLIPRDR_FILE_CONTENTS_REQUEST* fileContentsRequest)
{
wClipboardFileSizeRequest request = { 0 };
request.streamId = fileContentsRequest->streamId;
request.listIndex = fileContentsRequest->listIndex;
if (fileContentsRequest->cbRequested != sizeof(UINT64))
{
WLog_WARN(TAG, "unexpected FILECONTENTS_SIZE request: %" PRIu32 " bytes",
fileContentsRequest->cbRequested);
}
return clipboard->delegate->ClientRequestFileSize(clipboard->delegate, &request);
}
static UINT
xf_cliprdr_server_file_range_request(xfClipboard* clipboard,
const CLIPRDR_FILE_CONTENTS_REQUEST* fileContentsRequest)
{
wClipboardFileRangeRequest request = { 0 };
request.streamId = fileContentsRequest->streamId;
request.listIndex = fileContentsRequest->listIndex;
request.nPositionLow = fileContentsRequest->nPositionLow;
request.nPositionHigh = fileContentsRequest->nPositionHigh;
request.cbRequested = fileContentsRequest->cbRequested;
return clipboard->delegate->ClientRequestFileRange(clipboard->delegate, &request);
}
static UINT
xf_cliprdr_send_file_contents_failure(CliprdrClientContext* context,
const CLIPRDR_FILE_CONTENTS_REQUEST* fileContentsRequest)
{
CLIPRDR_FILE_CONTENTS_RESPONSE response = { 0 };
response.msgFlags = CB_RESPONSE_FAIL;
response.streamId = fileContentsRequest->streamId;
return context->ClientFileContentsResponse(context, &response);
}
static UINT
xf_cliprdr_server_file_contents_request(CliprdrClientContext* context,
const CLIPRDR_FILE_CONTENTS_REQUEST* fileContentsRequest)
{
UINT error = NO_ERROR;
xfClipboard* clipboard = context->custom;
/*
* MS-RDPECLIP 2.2.5.3 File Contents Request PDU (CLIPRDR_FILECONTENTS_REQUEST):
* The FILECONTENTS_SIZE and FILECONTENTS_RANGE flags MUST NOT be set at the same time.
*/
if ((fileContentsRequest->dwFlags & (FILECONTENTS_SIZE | FILECONTENTS_RANGE)) ==
(FILECONTENTS_SIZE | FILECONTENTS_RANGE))
{
WLog_ERR(TAG, "invalid CLIPRDR_FILECONTENTS_REQUEST.dwFlags");
return xf_cliprdr_send_file_contents_failure(context, fileContentsRequest);
}
if (fileContentsRequest->dwFlags & FILECONTENTS_SIZE)
error = xf_cliprdr_server_file_size_request(clipboard, fileContentsRequest);
if (fileContentsRequest->dwFlags & FILECONTENTS_RANGE)
error = xf_cliprdr_server_file_range_request(clipboard, fileContentsRequest);
if (error)
{
WLog_ERR(TAG, "failed to handle CLIPRDR_FILECONTENTS_REQUEST: 0x%08X", error);
return xf_cliprdr_send_file_contents_failure(context, fileContentsRequest);
}
return CHANNEL_RC_OK;
}
static UINT xf_cliprdr_clipboard_file_size_success(wClipboardDelegate* delegate,
const wClipboardFileSizeRequest* request,
UINT64 fileSize)
{
CLIPRDR_FILE_CONTENTS_RESPONSE response = { 0 };
xfClipboard* clipboard = delegate->custom;
response.msgFlags = CB_RESPONSE_OK;
response.streamId = request->streamId;
response.cbRequested = sizeof(UINT64);
response.requestedData = (BYTE*)&fileSize;
return clipboard->context->ClientFileContentsResponse(clipboard->context, &response);
}
static UINT xf_cliprdr_clipboard_file_size_failure(wClipboardDelegate* delegate,
const wClipboardFileSizeRequest* request,
UINT errorCode)
{
CLIPRDR_FILE_CONTENTS_RESPONSE response = { 0 };
xfClipboard* clipboard = delegate->custom;
WINPR_UNUSED(errorCode);
response.msgFlags = CB_RESPONSE_FAIL;
response.streamId = request->streamId;
return clipboard->context->ClientFileContentsResponse(clipboard->context, &response);
}
static UINT xf_cliprdr_clipboard_file_range_success(wClipboardDelegate* delegate,
const wClipboardFileRangeRequest* request,
const BYTE* data, UINT32 size)
{
CLIPRDR_FILE_CONTENTS_RESPONSE response = { 0 };
xfClipboard* clipboard = delegate->custom;
response.msgFlags = CB_RESPONSE_OK;
response.streamId = request->streamId;
response.cbRequested = size;
response.requestedData = (BYTE*)data;
return clipboard->context->ClientFileContentsResponse(clipboard->context, &response);
}
static UINT xf_cliprdr_clipboard_file_range_failure(wClipboardDelegate* delegate,
const wClipboardFileRangeRequest* request,
UINT errorCode)
{
CLIPRDR_FILE_CONTENTS_RESPONSE response = { 0 };
xfClipboard* clipboard = delegate->custom;
WINPR_UNUSED(errorCode);
response.msgFlags = CB_RESPONSE_FAIL;
response.streamId = request->streamId;
return clipboard->context->ClientFileContentsResponse(clipboard->context, &response);
}
static BOOL xf_cliprdr_clipboard_is_valid_unix_filename(LPCWSTR filename)
{
LPCWSTR c;
if (!filename)
return FALSE;
if (filename[0] == L'\0')
return FALSE;
/* Reserved characters */
for (c = filename; *c; ++c)
{
if (*c == L'/')
return FALSE;
}
return TRUE;
}
xfClipboard* xf_clipboard_new(xfContext* xfc, BOOL relieveFilenameRestriction)
{
int i, n = 0;
rdpChannels* channels;
xfClipboard* clipboard;
const char* selectionAtom;
if (!(clipboard = (xfClipboard*)calloc(1, sizeof(xfClipboard))))
{
WLog_ERR(TAG, "failed to allocate xfClipboard data");
return NULL;
}
xfc->clipboard = clipboard;
clipboard->xfc = xfc;
channels = ((rdpContext*)xfc)->channels;
clipboard->channels = channels;
clipboard->system = ClipboardCreate();
clipboard->requestedFormatId = -1;
clipboard->root_window = DefaultRootWindow(xfc->display);
selectionAtom = "CLIPBOARD";
if (xfc->context.settings->XSelectionAtom)
selectionAtom = xfc->context.settings->XSelectionAtom;
clipboard->clipboard_atom = XInternAtom(xfc->display, selectionAtom, FALSE);
if (clipboard->clipboard_atom == None)
{
WLog_ERR(TAG, "unable to get %s atom", selectionAtom);
goto error;
}
clipboard->timestamp_property_atom =
XInternAtom(xfc->display, "_FREERDP_TIMESTAMP_PROPERTY", FALSE);
clipboard->property_atom = XInternAtom(xfc->display, "_FREERDP_CLIPRDR", FALSE);
clipboard->raw_transfer_atom = XInternAtom(xfc->display, "_FREERDP_CLIPRDR_RAW", FALSE);
clipboard->raw_format_list_atom = XInternAtom(xfc->display, "_FREERDP_CLIPRDR_FORMATS", FALSE);
xf_cliprdr_set_raw_transfer_enabled(clipboard, TRUE);
XSelectInput(xfc->display, clipboard->root_window, PropertyChangeMask);
#ifdef WITH_XFIXES
if (XFixesQueryExtension(xfc->display, &clipboard->xfixes_event_base,
&clipboard->xfixes_error_base))
{
int xfmajor, xfminor;
if (XFixesQueryVersion(xfc->display, &xfmajor, &xfminor))
{
XFixesSelectSelectionInput(xfc->display, clipboard->root_window,
clipboard->clipboard_atom,
XFixesSetSelectionOwnerNotifyMask);
clipboard->xfixes_supported = TRUE;
}
else
{
WLog_ERR(TAG, "Error querying X Fixes extension version");
}
}
else
{
WLog_ERR(TAG, "Error loading X Fixes extension");
}
#else
WLog_ERR(
TAG,
"Warning: Using clipboard redirection without XFIXES extension is strongly discouraged!");
#endif
clipboard->clientFormats[n].atom = XInternAtom(xfc->display, "_FREERDP_RAW", False);
clipboard->clientFormats[n].formatId = CF_RAW;
n++;
clipboard->clientFormats[n].atom = XInternAtom(xfc->display, "UTF8_STRING", False);
clipboard->clientFormats[n].formatId = CF_UNICODETEXT;
n++;
clipboard->clientFormats[n].atom = XA_STRING;
clipboard->clientFormats[n].formatId = CF_TEXT;
n++;
clipboard->clientFormats[n].atom = XInternAtom(xfc->display, "image/png", False);
clipboard->clientFormats[n].formatId = CB_FORMAT_PNG;
n++;
clipboard->clientFormats[n].atom = XInternAtom(xfc->display, "image/jpeg", False);
clipboard->clientFormats[n].formatId = CB_FORMAT_JPEG;
n++;
clipboard->clientFormats[n].atom = XInternAtom(xfc->display, "image/gif", False);
clipboard->clientFormats[n].formatId = CB_FORMAT_GIF;
n++;
clipboard->clientFormats[n].atom = XInternAtom(xfc->display, "image/bmp", False);
clipboard->clientFormats[n].formatId = CF_DIB;
n++;
clipboard->clientFormats[n].atom = XInternAtom(xfc->display, "text/html", False);
clipboard->clientFormats[n].formatId = CB_FORMAT_HTML;
clipboard->clientFormats[n].formatName = _strdup("HTML Format");
if (!clipboard->clientFormats[n].formatName)
goto error;
n++;
/*
* Existence of registered format IDs for file formats does not guarantee that they are
* in fact supported by wClipboard (as further initialization may have failed after format
* registration). However, they are definitely not supported if there are no registered
* formats. In this case we should not list file formats in TARGETS.
*/
if (ClipboardGetFormatId(clipboard->system, "text/uri-list"))
{
clipboard->file_formats_registered = TRUE;
clipboard->clientFormats[n].atom = XInternAtom(xfc->display, "text/uri-list", False);
clipboard->clientFormats[n].formatId = CB_FORMAT_TEXTURILIST;
clipboard->clientFormats[n].formatName = _strdup("FileGroupDescriptorW");
if (!clipboard->clientFormats[n].formatName)
goto error;
n++;
}
clipboard->numClientFormats = n;
clipboard->targets[0] = XInternAtom(xfc->display, "TIMESTAMP", FALSE);
clipboard->targets[1] = XInternAtom(xfc->display, "TARGETS", FALSE);
clipboard->numTargets = 2;
clipboard->incr_atom = XInternAtom(xfc->display, "INCR", FALSE);
clipboard->delegate = ClipboardGetDelegate(clipboard->system);
clipboard->delegate->custom = clipboard;
/* TODO: set up a filesystem base path for local URI */
/* clipboard->delegate->basePath = "file:///tmp/foo/bar/gaga"; */
clipboard->delegate->ClipboardFileSizeSuccess = xf_cliprdr_clipboard_file_size_success;
clipboard->delegate->ClipboardFileSizeFailure = xf_cliprdr_clipboard_file_size_failure;
clipboard->delegate->ClipboardFileRangeSuccess = xf_cliprdr_clipboard_file_range_success;
clipboard->delegate->ClipboardFileRangeFailure = xf_cliprdr_clipboard_file_range_failure;
if (relieveFilenameRestriction)
{
WLog_DBG(TAG, "Relieving CLIPRDR filename restriction");
clipboard->delegate->IsFileNameComponentValid = xf_cliprdr_clipboard_is_valid_unix_filename;
}
return clipboard;
error:
for (i = 0; i < n; i++)
free(clipboard->clientFormats[i].formatName);
ClipboardDestroy(clipboard->system);
free(clipboard);
return NULL;
}
void xf_clipboard_free(xfClipboard* clipboard)
{
int i;
if (!clipboard)
return;
if (clipboard->serverFormats)
{
for (i = 0; i < clipboard->numServerFormats; i++)
free(clipboard->serverFormats[i].formatName);
free(clipboard->serverFormats);
clipboard->serverFormats = NULL;
}
if (clipboard->numClientFormats)
{
for (i = 0; i < clipboard->numClientFormats; i++)
free(clipboard->clientFormats[i].formatName);
}
ClipboardDestroy(clipboard->system);
xf_clipboard_formats_free(clipboard);
free(clipboard->data);
free(clipboard->data_raw);
free(clipboard->respond);
free(clipboard->incr_data);
free(clipboard);
}
void xf_cliprdr_init(xfContext* xfc, CliprdrClientContext* cliprdr)
{
xfc->cliprdr = cliprdr;
xfc->clipboard->context = cliprdr;
cliprdr->custom = (void*)xfc->clipboard;
cliprdr->MonitorReady = xf_cliprdr_monitor_ready;
cliprdr->ServerCapabilities = xf_cliprdr_server_capabilities;
cliprdr->ServerFormatList = xf_cliprdr_server_format_list;
cliprdr->ServerFormatListResponse = xf_cliprdr_server_format_list_response;
cliprdr->ServerFormatDataRequest = xf_cliprdr_server_format_data_request;
cliprdr->ServerFormatDataResponse = xf_cliprdr_server_format_data_response;
cliprdr->ServerFileContentsRequest = xf_cliprdr_server_file_contents_request;
}
void xf_cliprdr_uninit(xfContext* xfc, CliprdrClientContext* cliprdr)
{
xfc->cliprdr = NULL;
cliprdr->custom = NULL;
if (xfc->clipboard)
xfc->clipboard->context = NULL;
}
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