int guac_client_init(guac_client* client, int argc, char** argv) {
rfbClient* rfb_client;
vnc_guac_client_data* guac_client_data;
int retries_remaining;
/* Set up libvncclient logging */
rfbClientLog = guac_vnc_client_log_info;
rfbClientErr = guac_vnc_client_log_error;
/*** PARSE ARGUMENTS ***/
if (argc != VNC_ARGS_COUNT) {
guac_client_abort(client, GUAC_PROTOCOL_STATUS_SERVER_ERROR, "Wrong argument count received.");
return 1;
}
/* Alloc client data */
guac_client_data = malloc(sizeof(vnc_guac_client_data));
client->data = guac_client_data;
guac_client_data->hostname = strdup(argv[IDX_HOSTNAME]);
guac_client_data->port = atoi(argv[IDX_PORT]);
guac_client_data->password = strdup(argv[IDX_PASSWORD]); /* NOTE: freed by libvncclient */
guac_client_data->default_surface = NULL;
/* Set flags */
guac_client_data->remote_cursor = (strcmp(argv[IDX_CURSOR], "remote") == 0);
guac_client_data->swap_red_blue = (strcmp(argv[IDX_SWAP_RED_BLUE], "true") == 0);
guac_client_data->read_only = (strcmp(argv[IDX_READ_ONLY], "true") == 0);
/* Parse color depth */
guac_client_data->color_depth = atoi(argv[IDX_COLOR_DEPTH]);
#ifdef ENABLE_VNC_REPEATER
/* Set repeater parameters if specified */
if (argv[IDX_DEST_HOST][0] != '\0')
guac_client_data->dest_host = strdup(argv[IDX_DEST_HOST]);
else
guac_client_data->dest_host = NULL;
if (argv[IDX_DEST_PORT][0] != '\0')
guac_client_data->dest_port = atoi(argv[IDX_DEST_PORT]);
#endif
/* Set encodings if specified */
if (argv[IDX_ENCODINGS][0] != '\0')
guac_client_data->encodings = strdup(argv[IDX_ENCODINGS]);
else
guac_client_data->encodings = NULL;
/* Parse autoretry */
if (argv[IDX_AUTORETRY][0] != '\0')
retries_remaining = atoi(argv[IDX_AUTORETRY]);
else
retries_remaining = 0;
#ifdef ENABLE_VNC_LISTEN
/* Set reverse-connection flag */
guac_client_data->reverse_connect =
(strcmp(argv[IDX_REVERSE_CONNECT], "true") == 0);
/* Parse listen timeout */
if (argv[IDX_LISTEN_TIMEOUT][0] != '\0')
guac_client_data->listen_timeout = atoi(argv[IDX_LISTEN_TIMEOUT]);
else
guac_client_data->listen_timeout = 5000;
#endif
/* Init clipboard */
guac_client_data->clipboard = guac_common_clipboard_alloc(GUAC_VNC_CLIPBOARD_MAX_LENGTH);
/* Configure clipboard encoding */
if (guac_vnc_set_clipboard_encoding(client, argv[IDX_CLIPBOARD_ENCODING]))
guac_client_log(client, GUAC_LOG_INFO,
"Using non-standard VNC clipboard encoding: '%s'.",
argv[IDX_CLIPBOARD_ENCODING]);
/* Ensure connection is kept alive during lengthy connects */
guac_socket_require_keep_alive(client->socket);
/* Attempt connection */
rfb_client = __guac_vnc_get_client(client);
/* If unsuccessful, retry as many times as specified */
while (!rfb_client && retries_remaining > 0) {
struct timespec guac_vnc_connect_interval = {
.tv_sec = GUAC_VNC_CONNECT_INTERVAL/1000,
.tv_nsec = (GUAC_VNC_CONNECT_INTERVAL%1000)*1000000
};
guac_client_log(client, GUAC_LOG_INFO,
"Connect failed. Waiting %ims before retrying...",
GUAC_VNC_CONNECT_INTERVAL);
/* Wait for given interval then retry */
nanosleep(&guac_vnc_connect_interval, NULL);
rfb_client = __guac_vnc_get_client(client);
retries_remaining--;
}
/* If the final connect attempt fails, return error */
if (!rfb_client) {
guac_client_abort(client, GUAC_PROTOCOL_STATUS_UPSTREAM_ERROR, "Unable to connect to VNC server.");
return 1;
}
#ifdef ENABLE_PULSE
guac_client_data->audio_enabled =
(strcmp(argv[IDX_ENABLE_AUDIO], "true") == 0);
/* If an encoding is available, load an audio stream */
if (guac_client_data->audio_enabled) {
guac_client_data->audio = guac_audio_stream_alloc(client, NULL);
/* Load servername if specified */
if (argv[IDX_AUDIO_SERVERNAME][0] != '\0')
guac_client_data->pa_servername =
strdup(argv[IDX_AUDIO_SERVERNAME]);
else
guac_client_data->pa_servername = NULL;
/* If successful, init audio system */
if (guac_client_data->audio != NULL) {
guac_client_log(client, GUAC_LOG_INFO,
"Audio will be encoded as %s",
guac_client_data->audio->encoder->mimetype);
/* Require threadsafe sockets if audio enabled */
guac_socket_require_threadsafe(client->socket);
/* Start audio stream */
guac_pa_start_stream(client);
}
/* Otherwise, audio loading failed */
else
guac_client_log(client, GUAC_LOG_INFO,
"No available audio encoding. Sound disabled.");
} /* end if audio enabled */
#endif
#ifdef ENABLE_COMMON_SSH
guac_common_ssh_init(client);
/* Connect via SSH if SFTP is enabled */
if (strcmp(argv[IDX_ENABLE_SFTP], "true") == 0) {
guac_client_log(client, GUAC_LOG_DEBUG,
"Connecting via SSH for SFTP filesystem access.");
guac_client_data->sftp_user =
guac_common_ssh_create_user(argv[IDX_SFTP_USERNAME]);
/* Import private key, if given */
if (argv[IDX_SFTP_PRIVATE_KEY][0] != '\0') {
guac_client_log(client, GUAC_LOG_DEBUG,
"Authenticating with private key.");
/* Abort if private key cannot be read */
if (guac_common_ssh_user_import_key(guac_client_data->sftp_user,
argv[IDX_SFTP_PRIVATE_KEY],
argv[IDX_SFTP_PASSPHRASE])) {
guac_common_ssh_destroy_user(guac_client_data->sftp_user);
return 1;
}
}
/* Otherwise, use specified password */
else {
guac_client_log(client, GUAC_LOG_DEBUG,
"Authenticating with password.");
guac_common_ssh_user_set_password(guac_client_data->sftp_user,
argv[IDX_SFTP_PASSWORD]);
}
/* Parse hostname - use VNC hostname by default */
const char* sftp_hostname = argv[IDX_SFTP_HOSTNAME];
if (sftp_hostname[0] == '\0')
sftp_hostname = guac_client_data->hostname;
/* Parse port, defaulting to standard SSH port */
const char* sftp_port = argv[IDX_SFTP_PORT];
if (sftp_port[0] == '\0')
sftp_port = "22";
/* Attempt SSH connection */
guac_client_data->sftp_session =
guac_common_ssh_create_session(client, sftp_hostname, sftp_port,
guac_client_data->sftp_user);
/* Fail if SSH connection does not succeed */
if (guac_client_data->sftp_session == NULL) {
/* Already aborted within guac_common_ssh_create_session() */
guac_common_ssh_destroy_user(guac_client_data->sftp_user);
return 1;
}
/* Load and expose filesystem */
guac_client_data->sftp_filesystem =
guac_common_ssh_create_sftp_filesystem(
guac_client_data->sftp_session, "/");
/* Abort if SFTP connection fails */
if (guac_client_data->sftp_filesystem == NULL) {
guac_common_ssh_destroy_session(guac_client_data->sftp_session);
guac_common_ssh_destroy_user(guac_client_data->sftp_user);
return 1;
}
/* Configure destination for basic uploads, if specified */
if (argv[IDX_SFTP_DIRECTORY][0] != '\0')
guac_common_ssh_sftp_set_upload_path(
guac_client_data->sftp_filesystem,
argv[IDX_SFTP_DIRECTORY]);
/* Set file handler for basic uploads */
client->file_handler = guac_vnc_sftp_file_handler;
guac_client_log(client, GUAC_LOG_DEBUG,
"SFTP connection succeeded.");
}
#endif
/* Set remaining client data */
guac_client_data->rfb_client = rfb_client;
guac_client_data->copy_rect_used = 0;
guac_client_data->cursor = guac_client_alloc_buffer(client);
/* Set handlers */
client->handle_messages = vnc_guac_client_handle_messages;
client->free_handler = vnc_guac_client_free_handler;
/* If not read-only, set input handlers and pointer */
if (guac_client_data->read_only == 0) {
/* Only handle mouse/keyboard/clipboard if not read-only */
client->mouse_handler = vnc_guac_client_mouse_handler;
client->key_handler = vnc_guac_client_key_handler;
client->clipboard_handler = guac_vnc_clipboard_handler;
/* If not read-only but cursor is remote, set a dot cursor */
if (guac_client_data->remote_cursor)
guac_common_set_dot_cursor(client);
/* Otherwise, set pointer until explicitly requested otherwise */
else
guac_common_set_pointer_cursor(client);
}
/* Send name */
guac_protocol_send_name(client->socket, rfb_client->desktopName);
/* Create default surface */
guac_client_data->default_surface = guac_common_surface_alloc(client->socket, GUAC_DEFAULT_LAYER,
rfb_client->width, rfb_client->height);
return 0;
}
int guac_client_init(guac_client* client, int argc, char** argv) {
rfbClient* rfb_client;
vnc_guac_client_data* guac_client_data;
int retries_remaining;
/* Set up libvncclient logging */
rfbClientLog = guac_vnc_client_log_info;
rfbClientErr = guac_vnc_client_log_error;
/*** PARSE ARGUMENTS ***/
if (argc != VNC_ARGS_COUNT) {
guac_client_abort(client, GUAC_PROTOCOL_STATUS_SERVER_ERROR, "Wrong argument count received.");
return 1;
}
/* Alloc client data */
guac_client_data = malloc(sizeof(vnc_guac_client_data));
client->data = guac_client_data;
guac_client_data->hostname = strdup(argv[IDX_HOSTNAME]);
guac_client_data->port = atoi(argv[IDX_PORT]);
/* Set remote cursor flag */
guac_client_data->remote_cursor = (strcmp(argv[IDX_CURSOR], "remote") == 0);
/* Set red/blue swap flag */
guac_client_data->swap_red_blue = (strcmp(argv[IDX_SWAP_RED_BLUE], "true") == 0);
/* Set read-only flag */
guac_client_data->read_only = (strcmp(argv[IDX_READ_ONLY], "true") == 0);
/* Freed after use by libvncclient */
guac_client_data->password = strdup(argv[IDX_PASSWORD]);
/* Parse color depth */
guac_client_data->color_depth = atoi(argv[IDX_COLOR_DEPTH]);
#ifdef ENABLE_VNC_REPEATER
/* Set repeater parameters if specified */
if (argv[IDX_DEST_HOST][0] != '\0')
guac_client_data->dest_host = strdup(argv[IDX_DEST_HOST]);
else
guac_client_data->dest_host = NULL;
if (argv[IDX_DEST_PORT][0] != '\0')
guac_client_data->dest_port = atoi(argv[IDX_DEST_PORT]);
#endif
/* Set encodings if specified */
if (argv[IDX_ENCODINGS][0] != '\0')
guac_client_data->encodings = strdup(argv[IDX_ENCODINGS]);
else
guac_client_data->encodings = NULL;
/* Parse autoretry */
if (argv[IDX_AUTORETRY][0] != '\0')
retries_remaining = atoi(argv[IDX_AUTORETRY]);
else
retries_remaining = 0;
#ifdef ENABLE_VNC_LISTEN
/* Set reverse-connection flag */
guac_client_data->reverse_connect =
(strcmp(argv[IDX_REVERSE_CONNECT], "true") == 0);
/* Parse listen timeout */
if (argv[IDX_LISTEN_TIMEOUT][0] != '\0')
guac_client_data->listen_timeout = atoi(argv[IDX_LISTEN_TIMEOUT]);
else
guac_client_data->listen_timeout = 5000;
#endif
/* Init clipboard */
guac_client_data->clipboard = guac_common_clipboard_alloc(GUAC_VNC_CLIPBOARD_MAX_LENGTH);
/* Ensure connection is kept alive during lengthy connects */
guac_socket_require_keep_alive(client->socket);
/* Attempt connection */
rfb_client = __guac_vnc_get_client(client);
/* If unsuccessful, retry as many times as specified */
while (!rfb_client && retries_remaining > 0) {
guac_client_log_info(client,
"Connect failed. Waiting %ims before retrying...",
GUAC_VNC_CONNECT_INTERVAL);
/* Wait for given interval then retry */
usleep(GUAC_VNC_CONNECT_INTERVAL*1000);
rfb_client = __guac_vnc_get_client(client);
retries_remaining--;
}
/* If the final connect attempt fails, return error */
if (!rfb_client) {
guac_client_abort(client, GUAC_PROTOCOL_STATUS_UPSTREAM_ERROR, "Unable to connect to VNC server.");
return 1;
}
#ifdef ENABLE_PULSE
guac_client_data->audio_enabled =
(strcmp(argv[IDX_ENABLE_AUDIO], "true") == 0);
/* If an encoding is available, load an audio stream */
if (guac_client_data->audio_enabled) {
guac_client_data->audio = guac_audio_stream_alloc(client, NULL);
/* Load servername if specified */
if (argv[IDX_AUDIO_SERVERNAME][0] != '\0')
guac_client_data->pa_servername =
strdup(argv[IDX_AUDIO_SERVERNAME]);
else
guac_client_data->pa_servername = NULL;
/* If successful, init audio system */
if (guac_client_data->audio != NULL) {
guac_client_log_info(client,
"Audio will be encoded as %s",
guac_client_data->audio->encoder->mimetype);
/* Require threadsafe sockets if audio enabled */
guac_socket_require_threadsafe(client->socket);
/* Start audio stream */
guac_pa_start_stream(client);
}
/* Otherwise, audio loading failed */
else
guac_client_log_info(client,
"No available audio encoding. Sound disabled.");
} /* end if audio enabled */
#endif
/* Set remaining client data */
guac_client_data->rfb_client = rfb_client;
guac_client_data->copy_rect_used = 0;
guac_client_data->cursor = guac_client_alloc_buffer(client);
/* Set handlers */
client->handle_messages = vnc_guac_client_handle_messages;
client->free_handler = vnc_guac_client_free_handler;
/* If not read-only, set input handlers and pointer */
if (guac_client_data->read_only == 0) {
/* Only handle mouse/keyboard/clipboard if not read-only */
client->mouse_handler = vnc_guac_client_mouse_handler;
client->key_handler = vnc_guac_client_key_handler;
client->clipboard_handler = vnc_guac_client_clipboard_handler;
client->blob_handler = vnc_guac_client_blob_handler;
client->end_handler = vnc_guac_client_end_handler;
/* If not read-only but cursor is remote, set a dot cursor */
if (guac_client_data->remote_cursor)
guac_common_set_dot_cursor(client);
/* Otherwise, set pointer until explicitly requested otherwise */
else
guac_common_set_pointer_cursor(client);
}
/* Send name */
guac_protocol_send_name(client->socket, rfb_client->desktopName);
/* Send size */
guac_protocol_send_size(client->socket,
GUAC_DEFAULT_LAYER, rfb_client->width, rfb_client->height);
return 0;
}
int guac_client_init(guac_client* client, int argc, char** argv) {
rfbClient* rfb_client;
vnc_guac_client_data* guac_client_data;
int read_only;
/* Set up libvncclient logging */
rfbClientLog = guac_vnc_client_log_info;
rfbClientErr = guac_vnc_client_log_error;
/*** PARSE ARGUMENTS ***/
if (argc != VNC_ARGS_COUNT) {
guac_protocol_send_error(client->socket, "Wrong argument count received.");
guac_socket_flush(client->socket);
return 1;
}
/* Alloc client data */
guac_client_data = malloc(sizeof(vnc_guac_client_data));
client->data = guac_client_data;
/* Set read-only flag */
read_only = (strcmp(argv[IDX_READ_ONLY], "true") == 0);
/* Set red/blue swap flag */
guac_client_data->swap_red_blue = (strcmp(argv[IDX_SWAP_RED_BLUE], "true") == 0);
/* Freed after use by libvncclient */
guac_client_data->password = strdup(argv[IDX_PASSWORD]);
/*** INIT RFB CLIENT ***/
rfb_client = rfbGetClient(8, 3, 4); /* 32-bpp client */
/* Store Guac client in rfb client */
rfbClientSetClientData(rfb_client, __GUAC_CLIENT, client);
/* Framebuffer update handler */
rfb_client->GotFrameBufferUpdate = guac_vnc_update;
rfb_client->GotCopyRect = guac_vnc_copyrect;
/* Do not handle clipboard and local cursor if read-only */
if (read_only == 0) {
/* Enable client-side cursor */
rfb_client->GotCursorShape = guac_vnc_cursor;
rfb_client->appData.useRemoteCursor = TRUE;
/* Clipboard */
rfb_client->GotXCutText = guac_vnc_cut_text;
}
/* Password */
rfb_client->GetPassword = guac_vnc_get_password;
/* Depth */
guac_vnc_set_pixel_format(rfb_client, atoi(argv[IDX_COLOR_DEPTH]));
#ifdef ENABLE_PULSE
guac_client_data->audio_enabled =
(strcmp(argv[IDX_ENABLE_AUDIO], "true") == 0);
/* If an encoding is available, load an audio stream */
if (guac_client_data->audio_enabled) {
guac_client_data->audio = guac_audio_stream_alloc(client, NULL);
/* Load servername if specified */
if (argv[IDX_AUDIO_SERVERNAME][0] != '\0')
guac_client_data->pa_servername =
strdup(argv[IDX_AUDIO_SERVERNAME]);
else
guac_client_data->pa_servername = NULL;
/* If successful, init audio system */
if (guac_client_data->audio != NULL) {
guac_client_log_info(client,
"Audio will be encoded as %s",
guac_client_data->audio->encoder->mimetype);
/* Require threadsafe sockets if audio enabled */
guac_socket_require_threadsafe(client->socket);
/* Start audio stream */
guac_pa_start_stream(client);
}
/* Otherwise, audio loading failed */
else
guac_client_log_info(client,
"No available audio encoding. Sound disabled.");
} /* end if audio enabled */
#endif
/* Hook into allocation so we can handle resize. */
guac_client_data->rfb_MallocFrameBuffer = rfb_client->MallocFrameBuffer;
rfb_client->MallocFrameBuffer = guac_vnc_malloc_framebuffer;
rfb_client->canHandleNewFBSize = 1;
/* Set hostname and port */
rfb_client->serverHost = strdup(argv[0]);
rfb_client->serverPort = atoi(argv[1]);
#ifdef ENABLE_VNC_REPEATER
/* Set repeater parameters if specified */
if(argv[IDX_DEST_HOST][0] != '\0')
rfb_client->destHost = strdup(argv[IDX_DEST_HOST]);
if(argv[IDX_DEST_PORT][0] != '\0')
rfb_client->destPort = atoi(argv[IDX_DEST_PORT]);
#endif
/* Set encodings if specified */
if (argv[IDX_ENCODINGS][0] != '\0')
rfb_client->appData.encodingsString = guac_client_data->encodings
= strdup(argv[IDX_ENCODINGS]);
else
guac_client_data->encodings = NULL;
/* Connect */
if (!rfbInitClient(rfb_client, NULL, NULL)) {
guac_protocol_send_error(client->socket, "Error initializing VNC client");
guac_socket_flush(client->socket);
return 1;
}
/* Set remaining client data */
guac_client_data->rfb_client = rfb_client;
guac_client_data->copy_rect_used = 0;
guac_client_data->cursor = guac_client_alloc_buffer(client);
/* Set handlers */
client->handle_messages = vnc_guac_client_handle_messages;
client->free_handler = vnc_guac_client_free_handler;
if (read_only == 0) {
/* Do not handle mouse/keyboard/clipboard if read-only */
client->mouse_handler = vnc_guac_client_mouse_handler;
client->key_handler = vnc_guac_client_key_handler;
client->clipboard_handler = vnc_guac_client_clipboard_handler;
}
/* Send name */
guac_protocol_send_name(client->socket, rfb_client->desktopName);
/* Send size */
guac_protocol_send_size(client->socket,
GUAC_DEFAULT_LAYER, rfb_client->width, rfb_client->height);
return 0;
}
