2019-12-29 17:55:15 -08:00
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/*
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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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2020-01-04 13:07:28 -08:00
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#include "common/json.h"
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2019-12-29 17:55:15 -08:00
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#include "download.h"
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#include "fs.h"
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#include "ls.h"
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#include "rdp.h"
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#include <guacamole/client.h>
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2020-01-04 13:07:28 -08:00
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#include <guacamole/object.h>
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2019-12-29 17:55:15 -08:00
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#include <guacamole/protocol.h>
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#include <guacamole/socket.h>
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#include <guacamole/stream.h>
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#include <guacamole/string.h>
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2020-01-04 13:07:28 -08:00
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#include <guacamole/user.h>
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#include <winpr/nt.h>
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#include <winpr/shell.h>
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2019-12-29 17:55:15 -08:00
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#include <stdlib.h>
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int guac_rdp_download_ack_handler(guac_user* user, guac_stream* stream,
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char* message, guac_protocol_status status) {
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guac_client* client = user->client;
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guac_rdp_client* rdp_client = (guac_rdp_client*) client->data;
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guac_rdp_download_status* download_status = (guac_rdp_download_status*) stream->data;
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/* Get filesystem, return error if no filesystem */
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guac_rdp_fs* fs = rdp_client->filesystem;
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if (fs == NULL) {
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guac_protocol_send_ack(user->socket, stream, "FAIL (NO FS)",
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GUAC_PROTOCOL_STATUS_SERVER_ERROR);
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guac_socket_flush(user->socket);
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return 0;
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}
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/* If successful, read data */
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if (status == GUAC_PROTOCOL_STATUS_SUCCESS) {
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/* Attempt read into buffer */
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char buffer[4096];
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int bytes_read = guac_rdp_fs_read(fs,
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download_status->file_id,
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download_status->offset, buffer, sizeof(buffer));
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/* If bytes read, send as blob */
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if (bytes_read > 0) {
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download_status->offset += bytes_read;
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guac_protocol_send_blob(user->socket, stream,
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buffer, bytes_read);
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}
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/* If EOF, send end */
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else if (bytes_read == 0) {
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guac_protocol_send_end(user->socket, stream);
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guac_user_free_stream(user, stream);
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free(download_status);
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}
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/* Otherwise, fail stream */
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else {
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guac_user_log(user, GUAC_LOG_ERROR,
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"Error reading file for download");
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guac_protocol_send_end(user->socket, stream);
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guac_user_free_stream(user, stream);
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free(download_status);
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}
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guac_socket_flush(user->socket);
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}
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/* Otherwise, return stream to user */
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else
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guac_user_free_stream(user, stream);
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return 0;
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}
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int guac_rdp_download_get_handler(guac_user* user, guac_object* object,
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char* name) {
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guac_client* client = user->client;
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guac_rdp_client* rdp_client = (guac_rdp_client*) client->data;
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/* Get filesystem, ignore request if no filesystem */
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guac_rdp_fs* fs = rdp_client->filesystem;
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if (fs == NULL)
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return 0;
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/* Attempt to open file for reading */
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int file_id = guac_rdp_fs_open(fs, name, GENERIC_READ, 0, FILE_OPEN, 0);
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if (file_id < 0) {
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guac_user_log(user, GUAC_LOG_INFO, "Unable to read file \"%s\"",
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name);
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return 0;
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}
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/* Get opened file */
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guac_rdp_fs_file* file = guac_rdp_fs_get_file(fs, file_id);
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if (file == NULL) {
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guac_client_log(fs->client, GUAC_LOG_DEBUG,
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"%s: Successful open produced bad file_id: %i",
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__func__, file_id);
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return 0;
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}
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/* If directory, send contents of directory */
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if (file->attributes & FILE_ATTRIBUTE_DIRECTORY) {
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/* Create stream data */
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guac_rdp_ls_status* ls_status = malloc(sizeof(guac_rdp_ls_status));
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ls_status->fs = fs;
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ls_status->file_id = file_id;
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guac_strlcpy(ls_status->directory_name, name,
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sizeof(ls_status->directory_name));
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/* Allocate stream for body */
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guac_stream* stream = guac_user_alloc_stream(user);
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stream->ack_handler = guac_rdp_ls_ack_handler;
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stream->data = ls_status;
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/* Init JSON object state */
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guac_common_json_begin_object(user, stream,
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&ls_status->json_state);
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/* Associate new stream with get request */
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guac_protocol_send_body(user->socket, object, stream,
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GUAC_USER_STREAM_INDEX_MIMETYPE, name);
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}
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/* Otherwise, send file contents */
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else {
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/* Create stream data */
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guac_rdp_download_status* download_status = malloc(sizeof(guac_rdp_download_status));
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download_status->file_id = file_id;
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download_status->offset = 0;
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/* Allocate stream for body */
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guac_stream* stream = guac_user_alloc_stream(user);
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stream->data = download_status;
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stream->ack_handler = guac_rdp_download_ack_handler;
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/* Associate new stream with get request */
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guac_protocol_send_body(user->socket, object, stream,
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"application/octet-stream", name);
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}
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guac_socket_flush(user->socket);
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return 0;
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}
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void* guac_rdp_download_to_user(guac_user* user, void* data) {
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/* Do not bother attempting the download if the user has left */
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if (user == NULL)
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return NULL;
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guac_client* client = user->client;
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guac_rdp_client* rdp_client = (guac_rdp_client*) client->data;
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guac_rdp_fs* filesystem = rdp_client->filesystem;
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/* Ignore download if filesystem has been unloaded */
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if (filesystem == NULL)
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return NULL;
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2020-06-25 14:02:43 -07:00
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/* Ignore download if downloads have been disabled */
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if (filesystem->disable_download) {
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guac_client_log(client, GUAC_LOG_WARNING, "A download attempt has "
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"been blocked due to downloads being disabled, however it "
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"should have been blocked at a higher level. This is likely "
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"a bug.");
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return NULL;
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}
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2019-12-29 17:55:15 -08:00
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/* Attempt to open requested file */
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char* path = (char*) data;
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int file_id = guac_rdp_fs_open(filesystem, path,
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FILE_READ_DATA, 0, FILE_OPEN, 0);
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/* If file opened successfully, start stream */
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if (file_id >= 0) {
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/* Associate stream with transfer status */
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guac_stream* stream = guac_user_alloc_stream(user);
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2020-01-09 13:36:37 -08:00
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guac_rdp_download_status* download_status = malloc(sizeof(guac_rdp_download_status));
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stream->data = download_status;
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stream->ack_handler = guac_rdp_download_ack_handler;
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download_status->file_id = file_id;
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download_status->offset = 0;
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guac_user_log(user, GUAC_LOG_DEBUG, "%s: Initiating download "
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"of \"%s\"", __func__, path);
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/* Begin stream */
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guac_protocol_send_file(user->socket, stream,
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"application/octet-stream", guac_rdp_fs_basename(path));
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guac_socket_flush(user->socket);
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/* Download started successfully */
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return stream;
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}
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/* Download failed */
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guac_user_log(user, GUAC_LOG_ERROR, "Unable to download \"%s\"", path);
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return NULL;
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}
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