270 lines
8.0 KiB
C
270 lines
8.0 KiB
C
/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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#include "config.h"
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#include "client.h"
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#include "rdp.h"
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#include "rdp_cliprdr.h"
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#include "guac_clipboard.h"
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#include "guac_iconv.h"
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#include <freerdp/channels/channels.h>
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#include <freerdp/freerdp.h>
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#include <freerdp/utils/event.h>
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#include <guacamole/client.h>
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#ifdef ENABLE_WINPR
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#include <winpr/wtypes.h>
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#else
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#include "compat/winpr-wtypes.h"
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#endif
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#ifdef HAVE_FREERDP_CLIENT_CLIPRDR_H
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#include <freerdp/client/cliprdr.h>
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#else
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#include "compat/client-cliprdr.h"
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#endif
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#include <stdlib.h>
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#include <string.h>
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void guac_rdp_process_cliprdr_event(guac_client* client, wMessage* event) {
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#ifdef LEGACY_EVENT
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switch (event->event_type) {
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#else
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switch (GetMessageType(event->id)) {
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#endif
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case CliprdrChannel_MonitorReady:
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guac_rdp_process_cb_monitor_ready(client, event);
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break;
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case CliprdrChannel_FormatList:
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guac_rdp_process_cb_format_list(client,
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(RDP_CB_FORMAT_LIST_EVENT*) event);
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break;
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case CliprdrChannel_DataRequest:
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guac_rdp_process_cb_data_request(client,
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(RDP_CB_DATA_REQUEST_EVENT*) event);
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break;
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case CliprdrChannel_DataResponse:
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guac_rdp_process_cb_data_response(client,
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(RDP_CB_DATA_RESPONSE_EVENT*) event);
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break;
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default:
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#ifdef LEGACY_EVENT
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guac_client_log(client, GUAC_LOG_INFO,
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"Unknown cliprdr event type: 0x%x",
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event->event_type);
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#else
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guac_client_log(client, GUAC_LOG_INFO,
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"Unknown cliprdr event type: 0x%x",
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GetMessageType(event->id));
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#endif
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}
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}
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void guac_rdp_process_cb_monitor_ready(guac_client* client, wMessage* event) {
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rdpChannels* channels =
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((guac_rdp_client*) client->data)->rdp_inst->context->channels;
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RDP_CB_FORMAT_LIST_EVENT* format_list =
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(RDP_CB_FORMAT_LIST_EVENT*) freerdp_event_new(
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CliprdrChannel_Class,
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CliprdrChannel_FormatList,
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NULL, NULL);
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/* Received notification of clipboard support. */
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/* Respond with supported format list */
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format_list->formats = (UINT32*) malloc(sizeof(UINT32)*2);
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format_list->formats[0] = CB_FORMAT_TEXT;
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format_list->formats[1] = CB_FORMAT_UNICODETEXT;
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format_list->num_formats = 2;
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freerdp_channels_send_event(channels, (wMessage*) format_list);
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}
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/**
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* Sends a clipboard data request for the given format.
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*
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* @param client
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* The guac_client associated with the current RDP session.
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*
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* @param format
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* The clipboard format to request. This format must be one of the
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* documented values used by the CLIPRDR channel for clipboard format IDs.
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*/
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static void __guac_rdp_cb_request_format(guac_client* client, int format) {
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guac_rdp_client* rdp_client = (guac_rdp_client*) client->data;
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rdpChannels* channels = rdp_client->rdp_inst->context->channels;
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/* Create new data request */
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RDP_CB_DATA_REQUEST_EVENT* data_request =
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(RDP_CB_DATA_REQUEST_EVENT*) freerdp_event_new(
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CliprdrChannel_Class,
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CliprdrChannel_DataRequest,
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NULL, NULL);
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/* Set to requested format */
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rdp_client->requested_clipboard_format = format;
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data_request->format = format;
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/* Send request */
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freerdp_channels_send_event(channels, (wMessage*) data_request);
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}
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void guac_rdp_process_cb_format_list(guac_client* client,
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RDP_CB_FORMAT_LIST_EVENT* event) {
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int formats = 0;
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/* Received notification of available data */
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int i;
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for (i=0; i<event->num_formats; i++) {
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/* If plain text available, request it */
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if (event->formats[i] == CB_FORMAT_TEXT)
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formats |= GUAC_RDP_CLIPBOARD_FORMAT_CP1252;
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else if (event->formats[i] == CB_FORMAT_UNICODETEXT)
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formats |= GUAC_RDP_CLIPBOARD_FORMAT_UTF16;
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}
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/* Prefer Unicode to plain text */
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if (formats & GUAC_RDP_CLIPBOARD_FORMAT_UTF16) {
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__guac_rdp_cb_request_format(client, CB_FORMAT_UNICODETEXT);
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return;
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}
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/* Use plain text if Unicode unavailable */
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if (formats & GUAC_RDP_CLIPBOARD_FORMAT_CP1252) {
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__guac_rdp_cb_request_format(client, CB_FORMAT_TEXT);
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return;
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}
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/* Ignore if no supported format available */
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guac_client_log(client, GUAC_LOG_INFO, "Ignoring unsupported clipboard data");
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}
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void guac_rdp_process_cb_data_request(guac_client* client,
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RDP_CB_DATA_REQUEST_EVENT* event) {
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guac_rdp_client* rdp_client = (guac_rdp_client*) client->data;
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rdpChannels* channels = rdp_client->rdp_inst->context->channels;
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guac_iconv_write* writer;
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const char* input = rdp_client->clipboard->buffer;
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char* output = malloc(GUAC_RDP_CLIPBOARD_MAX_LENGTH);
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RDP_CB_DATA_RESPONSE_EVENT* data_response;
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/* Determine output encoding */
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switch (event->format) {
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case CB_FORMAT_TEXT:
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writer = GUAC_WRITE_CP1252;
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break;
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case CB_FORMAT_UNICODETEXT:
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writer = GUAC_WRITE_UTF16;
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break;
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default:
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guac_client_log(client, GUAC_LOG_ERROR,
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"Server requested unsupported clipboard data type");
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return;
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}
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/* Create new data response */
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data_response = (RDP_CB_DATA_RESPONSE_EVENT*) freerdp_event_new(
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CliprdrChannel_Class,
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CliprdrChannel_DataResponse,
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NULL, NULL);
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/* Set data and size */
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data_response->data = (BYTE*) output;
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guac_iconv(GUAC_READ_UTF8, &input, rdp_client->clipboard->length,
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writer, &output, GUAC_RDP_CLIPBOARD_MAX_LENGTH);
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data_response->size = ((BYTE*) output) - data_response->data;
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/* Send response */
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freerdp_channels_send_event(channels, (wMessage*) data_response);
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}
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void guac_rdp_process_cb_data_response(guac_client* client,
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RDP_CB_DATA_RESPONSE_EVENT* event) {
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guac_rdp_client* rdp_client = (guac_rdp_client*) client->data;
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char received_data[GUAC_RDP_CLIPBOARD_MAX_LENGTH];
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guac_iconv_read* reader;
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const char* input = (char*) event->data;
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char* output = received_data;
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/* Find correct source encoding */
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switch (rdp_client->requested_clipboard_format) {
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/* Non-Unicode */
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case CB_FORMAT_TEXT:
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reader = GUAC_READ_CP1252;
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break;
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/* Unicode (UTF-16) */
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case CB_FORMAT_UNICODETEXT:
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reader = GUAC_READ_UTF16;
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break;
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default:
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guac_client_log(client, GUAC_LOG_ERROR, "Requested clipboard data in "
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"unsupported format %i",
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rdp_client->requested_clipboard_format);
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return;
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}
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/* Convert send clipboard data */
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if (guac_iconv(reader, &input, event->size,
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GUAC_WRITE_UTF8, &output, sizeof(received_data))) {
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int length = strnlen(received_data, sizeof(received_data));
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guac_common_clipboard_reset(rdp_client->clipboard, "text/plain");
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guac_common_clipboard_append(rdp_client->clipboard, received_data, length);
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guac_common_clipboard_send(rdp_client->clipboard, client);
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}
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}
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