cscg24-guacamole

CSCG 2024 Challenge 'Guacamole Mashup'
git clone https://git.sinitax.com/sinitax/cscg24-guacamole
Log | Files | Refs | sfeed.txt

clipboard.c (4865B)

      1/*
      2 * Licensed to the Apache Software Foundation (ASF) under one
      3 * or more contributor license agreements.  See the NOTICE file
      4 * distributed with this work for additional information
      5 * regarding copyright ownership.  The ASF licenses this file
      6 * to you under the Apache License, Version 2.0 (the
      7 * "License"); you may not use this file except in compliance
      8 * with the License.  You may obtain a copy of the License at
      9 *
     10 *   http://www.apache.org/licenses/LICENSE-2.0
     11 *
     12 * Unless required by applicable law or agreed to in writing,
     13 * software distributed under the License is distributed on an
     14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
     15 * KIND, either express or implied.  See the License for the
     16 * specific language governing permissions and limitations
     17 * under the License.
     18 */
     19
     20#include "config.h"
     21#include "client.h"
     22#include "clipboard.h"
     23#include "common/clipboard.h"
     24#include "common/iconv.h"
     25#include "user.h"
     26#include "vnc.h"
     27
     28#include <guacamole/client.h>
     29#include <guacamole/stream.h>
     30#include <guacamole/user.h>
     31#include <rfb/rfbclient.h>
     32#include <rfb/rfbproto.h>
     33
     34int guac_vnc_set_clipboard_encoding(guac_client* client,
     35        const char* name) {
     36
     37    guac_vnc_client* vnc_client = (guac_vnc_client*) client->data;
     38
     39    /* Use ISO8859-1 if explicitly selected or NULL */
     40    if (name == NULL || strcmp(name, "ISO8859-1") == 0) {
     41        vnc_client->clipboard_reader = GUAC_READ_ISO8859_1;
     42        vnc_client->clipboard_writer = GUAC_WRITE_ISO8859_1;
     43        return 0;
     44    }
     45
     46    /* UTF-8 */
     47    if (strcmp(name, "UTF-8") == 0) {
     48        vnc_client->clipboard_reader = GUAC_READ_UTF8;
     49        vnc_client->clipboard_writer = GUAC_WRITE_UTF8;
     50        return 1;
     51    }
     52
     53    /* UTF-16 */
     54    if (strcmp(name, "UTF-16") == 0) {
     55        vnc_client->clipboard_reader = GUAC_READ_UTF16;
     56        vnc_client->clipboard_writer = GUAC_WRITE_UTF16;
     57        return 1;
     58    }
     59
     60    /* CP1252 */
     61    if (strcmp(name, "CP1252") == 0) {
     62        vnc_client->clipboard_reader = GUAC_READ_CP1252;
     63        vnc_client->clipboard_writer = GUAC_WRITE_CP1252;
     64        return 1;
     65    }
     66
     67    /* If encoding unrecognized, warn and default to ISO8859-1 */
     68    guac_client_log(client, GUAC_LOG_WARNING,
     69            "Encoding '%s' is invalid. Defaulting to ISO8859-1.", name);
     70
     71    vnc_client->clipboard_reader = GUAC_READ_ISO8859_1;
     72    vnc_client->clipboard_writer = GUAC_WRITE_ISO8859_1;
     73    return 0;
     74
     75}
     76
     77int guac_vnc_clipboard_handler(guac_user* user, guac_stream* stream,
     78        char* mimetype) {
     79
     80    /* Clear clipboard and prepare for new data */
     81    guac_vnc_client* vnc_client = (guac_vnc_client*) user->client->data;
     82    guac_common_clipboard_reset(vnc_client->clipboard, mimetype);
     83
     84    /* Set handlers for clipboard stream */
     85    stream->blob_handler = guac_vnc_clipboard_blob_handler;
     86    stream->end_handler = guac_vnc_clipboard_end_handler;
     87
     88    return 0;
     89}
     90
     91int guac_vnc_clipboard_blob_handler(guac_user* user, guac_stream* stream,
     92        void* data, int length) {
     93
     94    /* Append new data */
     95    guac_vnc_client* vnc_client = (guac_vnc_client*) user->client->data;
     96    guac_common_clipboard_append(vnc_client->clipboard, (char*) data, length);
     97
     98    return 0;
     99}
    100
    101int guac_vnc_clipboard_end_handler(guac_user* user, guac_stream* stream) {
    102
    103    guac_vnc_client* vnc_client = (guac_vnc_client*) user->client->data;
    104    rfbClient* rfb_client = vnc_client->rfb_client;
    105
    106    char output_data[GUAC_COMMON_CLIPBOARD_MAX_LENGTH];
    107
    108    const char* input = vnc_client->clipboard->buffer;
    109    char* output = output_data;
    110    guac_iconv_write* writer = vnc_client->clipboard_writer;
    111
    112    /* Convert clipboard contents */
    113    guac_iconv(GUAC_READ_UTF8, &input, vnc_client->clipboard->length,
    114               writer, &output, sizeof(output_data));
    115
    116    /* Send via VNC only if finished connecting */
    117    if (rfb_client != NULL)
    118        SendClientCutText(rfb_client, output_data, output - output_data);
    119
    120    return 0;
    121}
    122
    123void guac_vnc_cut_text(rfbClient* client, const char* text, int textlen) {
    124
    125    guac_client* gc = rfbClientGetClientData(client, GUAC_VNC_CLIENT_KEY);
    126    guac_vnc_client* vnc_client = (guac_vnc_client*) gc->data;
    127
    128    /* Ignore received text if outbound clipboard transfer is disabled */
    129    if (vnc_client->settings->disable_copy)
    130        return;
    131
    132    char received_data[GUAC_COMMON_CLIPBOARD_MAX_LENGTH];
    133
    134    const char* input = text;
    135    char* output = received_data;
    136    guac_iconv_read* reader = vnc_client->clipboard_reader;
    137
    138    /* Convert clipboard contents */
    139    guac_iconv(reader, &input, textlen,
    140               GUAC_WRITE_UTF8, &output, sizeof(received_data));
    141
    142    /* Send converted data */
    143    guac_common_clipboard_reset(vnc_client->clipboard, "text/plain");
    144    guac_common_clipboard_append(vnc_client->clipboard, received_data, output - received_data);
    145    guac_common_clipboard_send(vnc_client->clipboard, gc);
    146
    147}
    148