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guacamole-spice-protocol/src/protocols/rdp/rdp_cliprdr.c

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/*
* Copyright (C) 2013 Glyptodon LLC
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "config.h"
#include "client.h"
#include "rdp_cliprdr.h"
#include "guac_iconv.h"
#include <freerdp/channels/channels.h>
#include <freerdp/freerdp.h>
#include <freerdp/utils/event.h>
#include <guacamole/client.h>
#include <guacamole/protocol.h>
#ifdef ENABLE_WINPR
#include <winpr/wtypes.h>
#else
#include "compat/winpr-wtypes.h"
#endif
#ifdef HAVE_FREERDP_CLIENT_CLIPRDR_H
#include <freerdp/client/cliprdr.h>
#else
#include "compat/client-cliprdr.h"
#endif
void guac_rdp_process_cliprdr_event(guac_client* client, wMessage* event) {
#ifdef LEGACY_EVENT
switch (event->event_type) {
#else
switch (GetMessageType(event->id)) {
#endif
case CliprdrChannel_MonitorReady:
guac_rdp_process_cb_monitor_ready(client, event);
break;
case CliprdrChannel_FormatList:
guac_rdp_process_cb_format_list(client,
(RDP_CB_FORMAT_LIST_EVENT*) event);
break;
case CliprdrChannel_DataRequest:
guac_rdp_process_cb_data_request(client,
(RDP_CB_DATA_REQUEST_EVENT*) event);
break;
case CliprdrChannel_DataResponse:
guac_rdp_process_cb_data_response(client,
(RDP_CB_DATA_RESPONSE_EVENT*) event);
break;
default:
#ifdef LEGACY_EVENT
guac_client_log_info(client,
"Unknown cliprdr event type: 0x%x",
event->event_type);
#else
guac_client_log_info(client,
"Unknown cliprdr event type: 0x%x",
GetMessageType(event->id));
#endif
}
}
void guac_rdp_process_cb_monitor_ready(guac_client* client, wMessage* event) {
rdpChannels* channels =
((rdp_guac_client_data*) client->data)->rdp_inst->context->channels;
RDP_CB_FORMAT_LIST_EVENT* format_list =
(RDP_CB_FORMAT_LIST_EVENT*) freerdp_event_new(
CliprdrChannel_Class,
CliprdrChannel_FormatList,
NULL, NULL);
/* Received notification of clipboard support. */
/* Respond with supported format list */
format_list->formats = (UINT32*) malloc(sizeof(UINT32)*2);
format_list->formats[0] = CB_FORMAT_TEXT;
format_list->formats[1] = CB_FORMAT_UNICODETEXT;
format_list->num_formats = 2;
freerdp_channels_send_event(channels, (wMessage*) format_list);
}
/**
* Sends a clipboard data request for the given format.
*/
static void __guac_rdp_cb_request_format(guac_client* client, int format) {
rdp_guac_client_data* client_data = (rdp_guac_client_data*) client->data;
rdpChannels* channels = client_data->rdp_inst->context->channels;
/* Create new data request */
RDP_CB_DATA_REQUEST_EVENT* data_request =
(RDP_CB_DATA_REQUEST_EVENT*) freerdp_event_new(
CliprdrChannel_Class,
CliprdrChannel_DataRequest,
NULL, NULL);
/* Set to requested format */
client_data->requested_clipboard_format = format;
data_request->format = format;
/* Send request */
freerdp_channels_send_event(channels, (wMessage*) data_request);
}
void guac_rdp_process_cb_format_list(guac_client* client,
RDP_CB_FORMAT_LIST_EVENT* event) {
int formats = 0;
/* Received notification of available data */
int i;
for (i=0; i<event->num_formats; i++) {
/* If plain text available, request it */
if (event->formats[i] == CB_FORMAT_TEXT)
formats |= GUAC_RDP_CLIPBOARD_FORMAT_CP1252;
else if (event->formats[i] == CB_FORMAT_UNICODETEXT)
formats |= GUAC_RDP_CLIPBOARD_FORMAT_UTF16;
}
/* Prefer Unicode to plain text */
if (formats & GUAC_RDP_CLIPBOARD_FORMAT_UTF16) {
__guac_rdp_cb_request_format(client, CB_FORMAT_UNICODETEXT);
return;
}
/* Use plain text if Unicode unavailable */
if (formats & GUAC_RDP_CLIPBOARD_FORMAT_CP1252) {
__guac_rdp_cb_request_format(client, CB_FORMAT_TEXT);
return;
}
/* Ignore if no supported format available */
guac_client_log_info(client, "Ignoring unsupported clipboard data");
}
void guac_rdp_process_cb_data_request(guac_client* client,
RDP_CB_DATA_REQUEST_EVENT* event) {
rdp_guac_client_data* client_data = (rdp_guac_client_data*) client->data;
rdpChannels* channels = client_data->rdp_inst->context->channels;
guac_iconv_write* writer;
char* input = (char*) client_data->clipboard;;
char* output = malloc(GUAC_RDP_CLIPBOARD_MAX_LENGTH);
RDP_CB_DATA_RESPONSE_EVENT* data_response;
/* Determine output encoding */
switch (event->format) {
case CB_FORMAT_TEXT:
writer = GUAC_WRITE_CP1252;
break;
case CB_FORMAT_UNICODETEXT:
writer = GUAC_WRITE_UTF16;
break;
default:
guac_client_log_error(client,
"Server requested unsupported clipboard data type");
return;
}
/* Create new data response */
data_response = (RDP_CB_DATA_RESPONSE_EVENT*) freerdp_event_new(
CliprdrChannel_Class,
CliprdrChannel_DataResponse,
NULL, NULL);
/* Set data and size */
data_response->data = (BYTE*) output;
guac_iconv(GUAC_READ_UTF8, &input, GUAC_RDP_CLIPBOARD_MAX_LENGTH,
writer, &output, GUAC_RDP_CLIPBOARD_MAX_LENGTH);
data_response->size = ((BYTE*) output) - data_response->data;
/* Send response */
freerdp_channels_send_event(channels, (wMessage*) data_response);
}
void guac_rdp_process_cb_data_response(guac_client* client,
RDP_CB_DATA_RESPONSE_EVENT* event) {
rdp_guac_client_data* client_data = (rdp_guac_client_data*) client->data;
guac_iconv_read* reader;
char* input = (char*) event->data;
char* output = client_data->clipboard;
/* Find correct source encoding */
switch (client_data->requested_clipboard_format) {
/* Non-Unicode */
case CB_FORMAT_TEXT:
reader = GUAC_READ_CP1252;
break;
/* Unicode (UTF-16) */
case CB_FORMAT_UNICODETEXT:
reader = GUAC_READ_UTF16;
break;
default:
guac_client_log_error(client, "Requested clipboard data in "
"unsupported format %i",
client_data->requested_clipboard_format);
return;
}
/* Convert send clipboard data */
if (guac_iconv(reader, &input, event->size,
GUAC_WRITE_UTF8, &output, GUAC_RDP_CLIPBOARD_MAX_LENGTH)) {
char* current = client_data->clipboard;
int remaining = GUAC_RDP_CLIPBOARD_MAX_LENGTH;
/* Begin stream */
guac_stream* stream = guac_client_alloc_stream(client);
guac_protocol_send_clipboard(client->socket, stream, "text/plain");
/* Split clipboard into chunks */
while (remaining > 0) {
/* Calculate size of next block */
int block_size = 4096;
if (remaining < block_size)
block_size = remaining;
/* If at end of string, send final blob */
int length = strnlen(current, block_size);
if (length < block_size) {
guac_protocol_send_blob(client->socket, stream, current, length+1);
break;
}
/* Otherwise, send current blob and continue */
else
guac_protocol_send_blob(client->socket, stream, current, length);
/* Next block */
remaining -= length;
current += length;
}
/* End stream */
guac_protocol_send_end(client->socket, stream);
guac_client_free_stream(client, stream);
}
}
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