void __guac_rdp_client_load_keymap(guac_client* client,
const guac_rdp_keymap* keymap) {
rdp_guac_client_data* guac_client_data =
(rdp_guac_client_data*) client->data;
/* Get mapping */
const guac_rdp_keysym_desc* mapping = keymap->mapping;
/* If parent exists, load parent first */
if (keymap->parent != NULL)
__guac_rdp_client_load_keymap(client, keymap->parent);
/* Log load */
guac_client_log_info(client, "Loading keymap \"%s\"", keymap->name);
/* Load mapping into keymap */
while (mapping->keysym != 0) {
/* Copy mapping */
GUAC_RDP_KEYSYM_LOOKUP(guac_client_data->keymap, mapping->keysym) =
*mapping;
/* Next keysym */
mapping++;
}
}
int guac_client_init(guac_client* client, int argc, char** argv) {
rdp_guac_client_data* guac_client_data;
freerdp* rdp_inst;
rdpSettings* settings;
char* hostname;
int port = RDP_DEFAULT_PORT;
boolean bitmap_cache;
/**
* Selected server-side keymap. Client will be assumed to also use this
* keymap. Keys will be sent to server based on client input on a
* best-effort basis.
*/
const guac_rdp_keymap* chosen_keymap;
if (argc < RDP_ARGS_COUNT) {
guac_protocol_send_error(client->socket,
"Wrong argument count received.");
guac_socket_flush(client->socket);
guac_error = GUAC_STATUS_BAD_ARGUMENT;
guac_error_message = "Wrong argument count received";
return 1;
}
/* If port specified, use it */
if (argv[IDX_PORT][0] != '\0')
port = atoi(argv[IDX_PORT]);
hostname = argv[IDX_HOSTNAME];
/* Allocate client data */
guac_client_data = malloc(sizeof(rdp_guac_client_data));
/* Init random number generator */
srandom(time(NULL));
/* Init client */
freerdp_channels_global_init();
rdp_inst = freerdp_new();
rdp_inst->PreConnect = rdp_freerdp_pre_connect;
rdp_inst->PostConnect = rdp_freerdp_post_connect;
rdp_inst->ReceiveChannelData = __guac_receive_channel_data;
/* Allocate FreeRDP context */
rdp_inst->context_size = sizeof(rdp_freerdp_context);
rdp_inst->ContextNew = (pContextNew) rdp_freerdp_context_new;
rdp_inst->ContextFree = (pContextFree) rdp_freerdp_context_free;
freerdp_context_new(rdp_inst);
/* Set settings */
settings = rdp_inst->settings;
/* Console */
settings->console_session = (strcmp(argv[IDX_CONSOLE], "true") == 0);
settings->console_audio = (strcmp(argv[IDX_CONSOLE_AUDIO], "true") == 0);
/* --no-auth */
settings->authentication = false;
/* --sec rdp */
settings->rdp_security = true;
settings->tls_security = false;
settings->nla_security = false;
settings->encryption = true;
settings->encryption_method = ENCRYPTION_METHOD_40BIT | ENCRYPTION_METHOD_128BIT | ENCRYPTION_METHOD_FIPS;
settings->encryption_level = ENCRYPTION_LEVEL_CLIENT_COMPATIBLE;
/* Use optimal width unless overridden */
settings->width = client->info.optimal_width;
if (argv[IDX_WIDTH][0] != '\0')
settings->width = atoi(argv[IDX_WIDTH]);
/* Use default width if given width is invalid. */
if (settings->width <= 0) {
settings->width = RDP_DEFAULT_WIDTH;
guac_client_log_error(client,
"Invalid width: \"%s\". Using default of %i.",
argv[IDX_WIDTH], settings->width);
}
/* Round width up to nearest multiple of 4 */
settings->width = (settings->width + 3) & ~0x3;
/* Use optimal height unless overridden */
settings->height = client->info.optimal_height;
if (argv[IDX_HEIGHT][0] != '\0')
settings->height = atoi(argv[IDX_HEIGHT]);
/* Use default height if given height is invalid. */
if (settings->height <= 0) {
settings->height = RDP_DEFAULT_HEIGHT;
guac_client_log_error(client,
"Invalid height: \"%s\". Using default of %i.",
argv[IDX_WIDTH], settings->height);
}
/* Set hostname */
settings->hostname = strdup(hostname);
settings->port = port;
settings->window_title = strdup(hostname);
/* Domain */
if (argv[IDX_DOMAIN][0] != '\0')
settings->domain = strdup(argv[IDX_DOMAIN]);
/* Username */
if (argv[IDX_USERNAME][0] != '\0')
settings->username = strdup(argv[IDX_USERNAME]);
/* Password */
if (argv[IDX_PASSWORD][0] != '\0') {
settings->password = strdup(argv[IDX_PASSWORD]);
settings->autologon = 1;
}
/* Initial program */
if (argv[IDX_INITIAL_PROGRAM][0] != '\0')
settings->shell = strdup(argv[IDX_INITIAL_PROGRAM]);
/* Session color depth */
settings->color_depth = RDP_DEFAULT_DEPTH;
if (argv[IDX_COLOR_DEPTH][0] != '\0')
settings->color_depth = atoi(argv[IDX_COLOR_DEPTH]);
/* Use default depth if given depth is invalid. */
if (settings->color_depth == 0) {
settings->color_depth = RDP_DEFAULT_DEPTH;
guac_client_log_error(client,
"Invalid color-depth: \"%s\". Using default of %i.",
argv[IDX_WIDTH], settings->color_depth);
}
/* Audio enable/disable */
guac_client_data->audio_enabled =
(strcmp(argv[IDX_DISABLE_AUDIO], "true") != 0);
/* Printing enable/disable */
guac_client_data->printing_enabled =
(strcmp(argv[IDX_ENABLE_PRINTING], "true") == 0);
/* Order support */
bitmap_cache = settings->bitmap_cache;
settings->os_major_type = OSMAJORTYPE_UNSPECIFIED;
settings->os_minor_type = OSMINORTYPE_UNSPECIFIED;
settings->order_support[NEG_DSTBLT_INDEX] = true;
settings->order_support[NEG_PATBLT_INDEX] = false; /* PATBLT not yet supported */
settings->order_support[NEG_SCRBLT_INDEX] = true;
settings->order_support[NEG_OPAQUE_RECT_INDEX] = true;
settings->order_support[NEG_DRAWNINEGRID_INDEX] = false;
settings->order_support[NEG_MULTIDSTBLT_INDEX] = false;
settings->order_support[NEG_MULTIPATBLT_INDEX] = false;
settings->order_support[NEG_MULTISCRBLT_INDEX] = false;
settings->order_support[NEG_MULTIOPAQUERECT_INDEX] = false;
settings->order_support[NEG_MULTI_DRAWNINEGRID_INDEX] = false;
settings->order_support[NEG_LINETO_INDEX] = false;
settings->order_support[NEG_POLYLINE_INDEX] = false;
settings->order_support[NEG_MEMBLT_INDEX] = bitmap_cache;
settings->order_support[NEG_MEM3BLT_INDEX] = false;
settings->order_support[NEG_MEMBLT_V2_INDEX] = bitmap_cache;
settings->order_support[NEG_MEM3BLT_V2_INDEX] = false;
settings->order_support[NEG_SAVEBITMAP_INDEX] = false;
settings->order_support[NEG_GLYPH_INDEX_INDEX] = true;
settings->order_support[NEG_FAST_INDEX_INDEX] = true;
settings->order_support[NEG_FAST_GLYPH_INDEX] = true;
settings->order_support[NEG_POLYGON_SC_INDEX] = false;
settings->order_support[NEG_POLYGON_CB_INDEX] = false;
settings->order_support[NEG_ELLIPSE_SC_INDEX] = false;
settings->order_support[NEG_ELLIPSE_CB_INDEX] = false;
/* Store client data */
guac_client_data->rdp_inst = rdp_inst;
guac_client_data->bounded = false;
guac_client_data->mouse_button_mask = 0;
guac_client_data->current_surface = GUAC_DEFAULT_LAYER;
guac_client_data->clipboard = NULL;
guac_client_data->audio = NULL;
/* Main socket needs to be threadsafe */
guac_socket_require_threadsafe(client->socket);
/* Recursive attribute for locks */
pthread_mutexattr_init(&(guac_client_data->attributes));
pthread_mutexattr_settype(&(guac_client_data->attributes),
PTHREAD_MUTEX_RECURSIVE);
/* Init RDP lock */
pthread_mutex_init(&(guac_client_data->rdp_lock),
&(guac_client_data->attributes));
/* Clear keysym state mapping and keymap */
memset(guac_client_data->keysym_state, 0,
sizeof(guac_rdp_keysym_state_map));
memset(guac_client_data->keymap, 0,
sizeof(guac_rdp_static_keymap));
client->data = guac_client_data;
((rdp_freerdp_context*) rdp_inst->context)->client = client;
/* Pick keymap based on argument */
if (argv[IDX_SERVER_LAYOUT][0] != '\0') {
/* US English Qwerty */
if (strcmp("en-us-qwerty", argv[IDX_SERVER_LAYOUT]) == 0)
chosen_keymap = &guac_rdp_keymap_en_us;
/* German Qwertz */
else if (strcmp("de-de-qwertz", argv[IDX_SERVER_LAYOUT]) == 0)
chosen_keymap = &guac_rdp_keymap_de_de;
/* French Azerty */
else if (strcmp("fr-fr-azerty", argv[IDX_SERVER_LAYOUT]) == 0)
chosen_keymap = &guac_rdp_keymap_fr_fr;
/* Failsafe (Unicode) keymap */
else if (strcmp("failsafe", argv[IDX_SERVER_LAYOUT]) == 0)
chosen_keymap = &guac_rdp_keymap_failsafe;
/* If keymap unknown, resort to failsafe */
else {
guac_client_log_error(client,
"Unknown layout \"%s\". Using the failsafe layout instead.",
argv[IDX_SERVER_LAYOUT]);
chosen_keymap = &guac_rdp_keymap_failsafe;
}
}
/* If no keymap requested, assume US */
else
chosen_keymap = &guac_rdp_keymap_en_us;
/* Load keymap into client */
__guac_rdp_client_load_keymap(client, chosen_keymap);
/* Set server-side keymap */
settings->kbd_layout = chosen_keymap->freerdp_keyboard_layout;
/* Connect to RDP server */
if (!freerdp_connect(rdp_inst)) {
guac_protocol_send_error(client->socket,
"Error connecting to RDP server");
guac_socket_flush(client->socket);
guac_error = GUAC_STATUS_BAD_STATE;
guac_error_message = "Error connecting to RDP server";
return 1;
}
/* Send connection name */
guac_protocol_send_name(client->socket, settings->window_title);
/* Send size */
guac_protocol_send_size(client->socket, GUAC_DEFAULT_LAYER,
settings->width, settings->height);
/* Create glyph surfaces */
guac_client_data->opaque_glyph_surface = cairo_image_surface_create(
CAIRO_FORMAT_RGB24, settings->width, settings->height);
guac_client_data->trans_glyph_surface = cairo_image_surface_create(
CAIRO_FORMAT_ARGB32, settings->width, settings->height);
/* Set default pointer */
guac_rdp_set_default_pointer(client);
/* Success */
return 0;
}
int guac_client_init(guac_client* client, int argc, char** argv) {
rdp_guac_client_data* guac_client_data;
guac_rdp_settings* settings;
freerdp* rdp_inst;
/* Validate number of arguments received */
if (argc != RDP_ARGS_COUNT) {
guac_client_abort(client, GUAC_PROTOCOL_STATUS_SERVER_ERROR, "Wrong argument count received.");
return 1;
}
/* Allocate client data */
guac_client_data = malloc(sizeof(rdp_guac_client_data));
/* Init random number generator */
srandom(time(NULL));
/* Init client */
#ifdef HAVE_FREERDP_CHANNELS_GLOBAL_INIT
freerdp_channels_global_init();
#endif
rdp_inst = freerdp_new();
rdp_inst->PreConnect = rdp_freerdp_pre_connect;
rdp_inst->PostConnect = rdp_freerdp_post_connect;
rdp_inst->Authenticate = rdp_freerdp_authenticate;
rdp_inst->VerifyCertificate = rdp_freerdp_verify_certificate;
rdp_inst->ReceiveChannelData = __guac_receive_channel_data;
/* Allocate FreeRDP context */
#ifdef LEGACY_FREERDP
rdp_inst->context_size = sizeof(rdp_freerdp_context);
#else
rdp_inst->ContextSize = sizeof(rdp_freerdp_context);
#endif
rdp_inst->ContextNew = (pContextNew) rdp_freerdp_context_new;
rdp_inst->ContextFree = (pContextFree) rdp_freerdp_context_free;
freerdp_context_new(rdp_inst);
/* Set settings */
settings = &(guac_client_data->settings);
/* Console */
settings->console = (strcmp(argv[IDX_CONSOLE], "true") == 0);
settings->console_audio = (strcmp(argv[IDX_CONSOLE_AUDIO], "true") == 0);
/* Certificate and auth */
settings->ignore_certificate = (strcmp(argv[IDX_IGNORE_CERT], "true") == 0);
settings->disable_authentication = (strcmp(argv[IDX_DISABLE_AUTH], "true") == 0);
/* NLA security */
if (strcmp(argv[IDX_SECURITY], "nla") == 0) {
guac_client_log(client, GUAC_LOG_INFO, "Security mode: NLA");
settings->security_mode = GUAC_SECURITY_NLA;
}
/* TLS security */
else if (strcmp(argv[IDX_SECURITY], "tls") == 0) {
guac_client_log(client, GUAC_LOG_INFO, "Security mode: TLS");
settings->security_mode = GUAC_SECURITY_TLS;
}
/* RDP security */
else if (strcmp(argv[IDX_SECURITY], "rdp") == 0) {
guac_client_log(client, GUAC_LOG_INFO, "Security mode: RDP");
settings->security_mode = GUAC_SECURITY_RDP;
}
/* ANY security (allow server to choose) */
else if (strcmp(argv[IDX_SECURITY], "any") == 0) {
guac_client_log(client, GUAC_LOG_INFO, "Security mode: ANY");
settings->security_mode = GUAC_SECURITY_ANY;
}
/* If nothing given, default to RDP */
else {
guac_client_log(client, GUAC_LOG_INFO, "No security mode specified. Defaulting to RDP.");
settings->security_mode = GUAC_SECURITY_RDP;
}
/* Set hostname */
settings->hostname = strdup(argv[IDX_HOSTNAME]);
/* If port specified, use it */
settings->port = RDP_DEFAULT_PORT;
if (argv[IDX_PORT][0] != '\0')
settings->port = atoi(argv[IDX_PORT]);
guac_client_log(client, GUAC_LOG_DEBUG,
"Client resolution is %ix%i at %i DPI",
client->info.optimal_width,
client->info.optimal_height,
client->info.optimal_resolution);
/* Use suggested resolution unless overridden */
settings->resolution = guac_rdp_suggest_resolution(client);
if (argv[IDX_DPI][0] != '\0')
settings->resolution = atoi(argv[IDX_DPI]);
/* Use optimal width unless overridden */
settings->width = client->info.optimal_width
* settings->resolution
/ client->info.optimal_resolution;
if (argv[IDX_WIDTH][0] != '\0')
settings->width = atoi(argv[IDX_WIDTH]);
/* Use default width if given width is invalid. */
if (settings->width <= 0) {
settings->width = RDP_DEFAULT_WIDTH;
guac_client_log(client, GUAC_LOG_ERROR,
"Invalid width: \"%s\". Using default of %i.",
argv[IDX_WIDTH], settings->width);
}
/* Round width down to nearest multiple of 4 */
settings->width = settings->width & ~0x3;
/* Use optimal height unless overridden */
settings->height = client->info.optimal_height
* settings->resolution
/ client->info.optimal_resolution;
if (argv[IDX_HEIGHT][0] != '\0')
settings->height = atoi(argv[IDX_HEIGHT]);
/* Use default height if given height is invalid. */
if (settings->height <= 0) {
settings->height = RDP_DEFAULT_HEIGHT;
guac_client_log(client, GUAC_LOG_ERROR,
"Invalid height: \"%s\". Using default of %i.",
argv[IDX_WIDTH], settings->height);
}
guac_client_log(client, GUAC_LOG_DEBUG,
"Using resolution of %ix%i at %i DPI",
settings->width,
settings->height,
settings->resolution);
/* Domain */
settings->domain = NULL;
if (argv[IDX_DOMAIN][0] != '\0')
settings->domain = strdup(argv[IDX_DOMAIN]);
/* Username */
settings->username = NULL;
if (argv[IDX_USERNAME][0] != '\0')
settings->username = strdup(argv[IDX_USERNAME]);
/* Password */
settings->password = NULL;
if (argv[IDX_PASSWORD][0] != '\0')
settings->password = strdup(argv[IDX_PASSWORD]);
/* Client name */
settings->client_name = NULL;
if (argv[IDX_CLIENT_NAME][0] != '\0')
settings->client_name = strdup(argv[IDX_CLIENT_NAME]);
/* Initial program */
settings->initial_program = NULL;
if (argv[IDX_INITIAL_PROGRAM][0] != '\0')
settings->initial_program = strdup(argv[IDX_INITIAL_PROGRAM]);
/* RemoteApp program */
settings->remote_app = NULL;
if (argv[IDX_REMOTE_APP][0] != '\0')
settings->remote_app = strdup(argv[IDX_REMOTE_APP]);
/* RemoteApp working directory */
settings->remote_app_dir = NULL;
if (argv[IDX_REMOTE_APP_DIR][0] != '\0')
settings->remote_app_dir = strdup(argv[IDX_REMOTE_APP_DIR]);
/* RemoteApp arguments */
settings->remote_app_args = NULL;
if (argv[IDX_REMOTE_APP_ARGS][0] != '\0')
settings->remote_app_args = strdup(argv[IDX_REMOTE_APP_ARGS]);
/* Static virtual channels */
settings->svc_names = NULL;
if (argv[IDX_STATIC_CHANNELS][0] != '\0')
settings->svc_names = guac_split(argv[IDX_STATIC_CHANNELS], ',');
/* Performance flags */
settings->wallpaper_enabled = (strcmp(argv[IDX_ENABLE_WALLPAPER], "true") == 0);
settings->theming_enabled = (strcmp(argv[IDX_ENABLE_THEMING], "true") == 0);
settings->font_smoothing_enabled = (strcmp(argv[IDX_ENABLE_FONT_SMOOTHING], "true") == 0);
settings->full_window_drag_enabled = (strcmp(argv[IDX_ENABLE_FULL_WINDOW_DRAG], "true") == 0);
settings->desktop_composition_enabled = (strcmp(argv[IDX_ENABLE_DESKTOP_COMPOSITION], "true") == 0);
settings->menu_animations_enabled = (strcmp(argv[IDX_ENABLE_MENU_ANIMATIONS], "true") == 0);
/* Session color depth */
settings->color_depth = RDP_DEFAULT_DEPTH;
if (argv[IDX_COLOR_DEPTH][0] != '\0')
settings->color_depth = atoi(argv[IDX_COLOR_DEPTH]);
/* Use default depth if given depth is invalid. */
if (settings->color_depth == 0) {
settings->color_depth = RDP_DEFAULT_DEPTH;
guac_client_log(client, GUAC_LOG_ERROR,
"Invalid color-depth: \"%s\". Using default of %i.",
argv[IDX_WIDTH], settings->color_depth);
}
/* Audio enable/disable */
guac_client_data->settings.audio_enabled =
(strcmp(argv[IDX_DISABLE_AUDIO], "true") != 0);
/* Printing enable/disable */
guac_client_data->settings.printing_enabled =
(strcmp(argv[IDX_ENABLE_PRINTING], "true") == 0);
/* Drive enable/disable */
guac_client_data->settings.drive_enabled =
(strcmp(argv[IDX_ENABLE_DRIVE], "true") == 0);
guac_client_data->settings.drive_path = strdup(argv[IDX_DRIVE_PATH]);
guac_client_data->settings.create_drive_path =
(strcmp(argv[IDX_CREATE_DRIVE_PATH], "true") == 0);
/* Store client data */
guac_client_data->rdp_inst = rdp_inst;
guac_client_data->mouse_button_mask = 0;
guac_client_data->clipboard = guac_common_clipboard_alloc(GUAC_RDP_CLIPBOARD_MAX_LENGTH);
guac_client_data->requested_clipboard_format = CB_FORMAT_TEXT;
guac_client_data->audio = NULL;
guac_client_data->filesystem = NULL;
guac_client_data->available_svc = guac_common_list_alloc();
/* Main socket needs to be threadsafe */
guac_socket_require_threadsafe(client->socket);
/* Recursive attribute for locks */
pthread_mutexattr_init(&(guac_client_data->attributes));
pthread_mutexattr_settype(&(guac_client_data->attributes),
PTHREAD_MUTEX_RECURSIVE);
/* Init RDP lock */
pthread_mutex_init(&(guac_client_data->rdp_lock),
&(guac_client_data->attributes));
/* Clear keysym state mapping and keymap */
memset(guac_client_data->keysym_state, 0,
sizeof(guac_rdp_keysym_state_map));
memset(guac_client_data->keymap, 0,
sizeof(guac_rdp_static_keymap));
client->data = guac_client_data;
((rdp_freerdp_context*) rdp_inst->context)->client = client;
/* Pick keymap based on argument */
settings->server_layout = NULL;
if (argv[IDX_SERVER_LAYOUT][0] != '\0')
settings->server_layout =
guac_rdp_keymap_find(argv[IDX_SERVER_LAYOUT]);
/* If no keymap requested, use default */
if (settings->server_layout == NULL)
settings->server_layout = guac_rdp_keymap_find(GUAC_DEFAULT_KEYMAP);
/* Load keymap into client */
__guac_rdp_client_load_keymap(client, settings->server_layout);
#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.");
/* Parse username - use RDP username by default */
const char* sftp_username = argv[IDX_SFTP_USERNAME];
if (sftp_username[0] == '\0' && settings->username != NULL)
sftp_username = settings->username;
guac_client_data->sftp_user =
guac_common_ssh_create_user(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.");
/* Parse password - use RDP password by default */
const char* sftp_password = argv[IDX_SFTP_PASSWORD];
if (sftp_password[0] == '\0' && settings->password != NULL)
sftp_password = settings->password;
guac_common_ssh_user_set_password(guac_client_data->sftp_user,
sftp_password);
}
/* Parse hostname - use RDP hostname by default */
const char* sftp_hostname = argv[IDX_SFTP_HOSTNAME];
if (sftp_hostname[0] == '\0')
sftp_hostname = settings->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') {
client->file_handler = guac_rdp_sftp_file_handler;
guac_common_ssh_sftp_set_upload_path(
guac_client_data->sftp_filesystem,
argv[IDX_SFTP_DIRECTORY]);
}
/* Otherwise, use SFTP for basic uploads only if drive not enabled */
else if (!settings->drive_enabled)
client->file_handler = guac_rdp_sftp_file_handler;
guac_client_log(client, GUAC_LOG_DEBUG,
"SFTP connection succeeded.");
}
#endif
/* Create default surface */
guac_client_data->default_surface = guac_common_surface_alloc(client->socket, GUAC_DEFAULT_LAYER,
settings->width, settings->height);
guac_client_data->current_surface = guac_client_data->default_surface;
/* Send connection name */
guac_protocol_send_name(client->socket, settings->hostname);
/* Set default pointer */
guac_common_set_pointer_cursor(client);
/* Push desired settings to FreeRDP */
guac_rdp_push_settings(settings, rdp_inst);
/* Connect to RDP server */
if (!freerdp_connect(rdp_inst)) {
guac_client_abort(client, GUAC_PROTOCOL_STATUS_UPSTREAM_ERROR, "Error connecting to RDP server");
return 1;
}
/* Success */
return 0;
}
/**
* Waits for messages from the RDP server for the given number of microseconds.
*
* @param client
* The client associated with the current RDP session.
*
* @param timeout_usecs
* The maximum amount of time to wait, in microseconds.
*
* @return
* A positive value if messages are ready, zero if the specified timeout
* period elapsed, or a negative value if an error occurs.
*/
static int rdp_guac_client_wait_for_messages(guac_client* client,
int timeout_usecs) {
guac_rdp_client* rdp_client = (guac_rdp_client*) client->data;
freerdp* rdp_inst = rdp_client->rdp_inst;
rdpChannels* channels = rdp_inst->context->channels;
int result;
int index;
int max_fd, fd;
void* read_fds[32];
void* write_fds[32];
int read_count = 0;
int write_count = 0;
fd_set rfds, wfds;
struct timeval timeout = {
.tv_sec = 0,
.tv_usec = timeout_usecs
};
/* Get RDP fds */
if (!freerdp_get_fds(rdp_inst, read_fds, &read_count, write_fds, &write_count)) {
guac_client_abort(client, GUAC_PROTOCOL_STATUS_SERVER_ERROR, "Unable to read RDP file descriptors.");
return -1;
}
/* Get channel fds */
if (!freerdp_channels_get_fds(channels, rdp_inst, read_fds, &read_count, write_fds,
&write_count)) {
guac_client_abort(client, GUAC_PROTOCOL_STATUS_SERVER_ERROR, "Unable to read RDP channel file descriptors.");
return -1;
}
/* Construct read fd_set */
max_fd = 0;
FD_ZERO(&rfds);
for (index = 0; index < read_count; index++) {
fd = (int)(long) (read_fds[index]);
if (fd > max_fd)
max_fd = fd;
FD_SET(fd, &rfds);
}
/* Construct write fd_set */
FD_ZERO(&wfds);
for (index = 0; index < write_count; index++) {
fd = (int)(long) (write_fds[index]);
if (fd > max_fd)
max_fd = fd;
FD_SET(fd, &wfds);
}
/* If no file descriptors, error */
if (max_fd == 0) {
guac_client_abort(client, GUAC_PROTOCOL_STATUS_SERVER_ERROR, "No file descriptors associated with RDP connection.");
return -1;
}
/* Wait for all RDP file descriptors */
result = select(max_fd + 1, &rfds, &wfds, NULL, &timeout);
if (result < 0) {
/* If error ignorable, pretend timout occurred */
if (errno == EAGAIN
|| errno == EWOULDBLOCK
|| errno == EINPROGRESS
|| errno == EINTR)
return 0;
/* Otherwise, return as error */
guac_client_abort(client, GUAC_PROTOCOL_STATUS_SERVER_ERROR, "Error waiting for file descriptor.");
return -1;
}
/* Return wait result */
return result;
}
/**
* Connects to an RDP server as described by the guac_rdp_settings structure
* associated with the given client, allocating and freeing all objects
* directly related to the RDP connection. It is expected that all objects
* which are independent of FreeRDP's state (the clipboard, display update
* management, etc.) will already be allocated and associated with the
* guac_rdp_client associated with the given guac_client. This function blocks
* for the duration of the RDP session, returning only after the session has
* completely disconnected.
*
* @param client
* The guac_client associated with the RDP settings describing the
* connection that should be established.
*
* @return
* Zero if the connection successfully terminated and a reconnect is
* desired, non-zero if an error occurs or the connection was disconnected
* and a reconnect is NOT desired.
*/
static int guac_rdp_handle_connection(guac_client* client) {
guac_rdp_client* rdp_client = (guac_rdp_client*) client->data;
guac_rdp_settings* settings = rdp_client->settings;
/* Init random number generator */
srandom(time(NULL));
/* Set up screen recording, if requested */
if (settings->recording_path != NULL) {
guac_common_recording_create(client,
settings->recording_path,
settings->recording_name,
settings->create_recording_path);
}
/* Create display */
rdp_client->display = guac_common_display_alloc(client,
rdp_client->settings->width,
rdp_client->settings->height);
rdp_client->current_surface = rdp_client->display->default_surface;
rdp_client->requested_clipboard_format = CB_FORMAT_TEXT;
rdp_client->available_svc = guac_common_list_alloc();
#ifdef HAVE_FREERDP_CHANNELS_GLOBAL_INIT
freerdp_channels_global_init();
#endif
/* Init client */
freerdp* rdp_inst = freerdp_new();
rdp_inst->PreConnect = rdp_freerdp_pre_connect;
rdp_inst->PostConnect = rdp_freerdp_post_connect;
rdp_inst->Authenticate = rdp_freerdp_authenticate;
rdp_inst->VerifyCertificate = rdp_freerdp_verify_certificate;
rdp_inst->ReceiveChannelData = __guac_receive_channel_data;
/* Allocate FreeRDP context */
#ifdef LEGACY_FREERDP
rdp_inst->context_size = sizeof(rdp_freerdp_context);
#else
rdp_inst->ContextSize = sizeof(rdp_freerdp_context);
#endif
rdp_inst->ContextNew = (pContextNew) rdp_freerdp_context_new;
rdp_inst->ContextFree = (pContextFree) rdp_freerdp_context_free;
freerdp_context_new(rdp_inst);
((rdp_freerdp_context*) rdp_inst->context)->client = client;
/* Load keymap into client */
__guac_rdp_client_load_keymap(client, settings->server_layout);
/* Send connection name */
guac_protocol_send_name(client->socket, settings->hostname);
/* Set default pointer */
guac_common_cursor_set_pointer(rdp_client->display->cursor);
/* Push desired settings to FreeRDP */
guac_rdp_push_settings(settings, rdp_inst);
/* Connect to RDP server */
if (!freerdp_connect(rdp_inst)) {
guac_client_abort(client, GUAC_PROTOCOL_STATUS_UPSTREAM_ERROR,
"Error connecting to RDP server");
return 1;
}
/* Connection complete */
rdp_client->rdp_inst = rdp_inst;
rdpChannels* channels = rdp_inst->context->channels;
guac_timestamp last_frame_end = guac_timestamp_current();
/* Signal that reconnect has been completed */
guac_rdp_disp_reconnect_complete(rdp_client->disp);
/* Handle messages from RDP server while client is running */
while (client->state == GUAC_CLIENT_RUNNING
&& !guac_rdp_disp_reconnect_needed(rdp_client->disp)) {
/* Update remote display size */
pthread_mutex_lock(&(rdp_client->rdp_lock));
guac_rdp_disp_update_size(rdp_client->disp, settings, rdp_inst);
pthread_mutex_unlock(&(rdp_client->rdp_lock));
/* Wait for data and construct a reasonable frame */
int wait_result = rdp_guac_client_wait_for_messages(client,
GUAC_RDP_FRAME_START_TIMEOUT);
if (wait_result > 0) {
int processing_lag = guac_client_get_processing_lag(client);
guac_timestamp frame_start = guac_timestamp_current();
/* Read server messages until frame is built */
do {
guac_timestamp frame_end;
int frame_remaining;
pthread_mutex_lock(&(rdp_client->rdp_lock));
/* Check the libfreerdp fds */
if (!freerdp_check_fds(rdp_inst)) {
guac_client_abort(client,
GUAC_PROTOCOL_STATUS_SERVER_ERROR,
"Error handling RDP file descriptors");
pthread_mutex_unlock(&(rdp_client->rdp_lock));
return 1;
}
/* Check channel fds */
if (!freerdp_channels_check_fds(channels, rdp_inst)) {
guac_client_abort(client,
GUAC_PROTOCOL_STATUS_SERVER_ERROR,
"Error handling RDP channel file descriptors");
pthread_mutex_unlock(&(rdp_client->rdp_lock));
return 1;
}
/* Check for channel events */
wMessage* event = freerdp_channels_pop_event(channels);
if (event) {
/* Handle channel events (clipboard and RAIL) */
#ifdef LEGACY_EVENT
if (event->event_class == CliprdrChannel_Class)
guac_rdp_process_cliprdr_event(client, event);
else if (event->event_class == RailChannel_Class)
guac_rdp_process_rail_event(client, event);
#else
if (GetMessageClass(event->id) == CliprdrChannel_Class)
guac_rdp_process_cliprdr_event(client, event);
else if (GetMessageClass(event->id) == RailChannel_Class)
guac_rdp_process_rail_event(client, event);
#endif
freerdp_event_free(event);
}
/* Handle RDP disconnect */
if (freerdp_shall_disconnect(rdp_inst)) {
guac_client_stop(client);
guac_client_log(client, GUAC_LOG_INFO,
"RDP server closed connection");
pthread_mutex_unlock(&(rdp_client->rdp_lock));
return 1;
}
pthread_mutex_unlock(&(rdp_client->rdp_lock));
/* Calculate time remaining in frame */
frame_end = guac_timestamp_current();
frame_remaining = frame_start + GUAC_RDP_FRAME_DURATION
- frame_end;
/* Calculate time that client needs to catch up */
int time_elapsed = frame_end - last_frame_end;
int required_wait = processing_lag - time_elapsed;
/* Increase the duration of this frame if client is lagging */
if (required_wait > GUAC_RDP_FRAME_TIMEOUT)
wait_result = rdp_guac_client_wait_for_messages(client,
required_wait*1000);
/* Wait again if frame remaining */
else if (frame_remaining > 0)
wait_result = rdp_guac_client_wait_for_messages(client,
GUAC_RDP_FRAME_TIMEOUT*1000);
else
break;
} while (wait_result > 0);
}
/* If an error occurred, fail */
if (wait_result < 0)
guac_client_abort(client, GUAC_PROTOCOL_STATUS_UPSTREAM_ERROR,
"Connection closed.");
/* End of frame */
guac_common_display_flush(rdp_client->display);
guac_client_end_frame(client);
guac_socket_flush(client->socket);
/* Record end of frame */
last_frame_end = guac_timestamp_current();
}
/* Kill client and finish connection */
guac_client_stop(client);
guac_client_log(client, GUAC_LOG_INFO, "Internal RDP client disconnected");
pthread_mutex_lock(&(rdp_client->rdp_lock));
/* Disconnect client and channels */
freerdp_channels_close(channels, rdp_inst);
freerdp_channels_free(channels);
freerdp_disconnect(rdp_inst);
/* Clean up RDP client context */
freerdp_clrconv_free(((rdp_freerdp_context*) rdp_inst->context)->clrconv);
cache_free(rdp_inst->context->cache);
freerdp_context_free(rdp_inst);
/* Clean up RDP client */
freerdp_free(rdp_inst);
rdp_client->rdp_inst = NULL;
/* Free SVC list */
guac_common_list_free(rdp_client->available_svc);
/* Free display */
guac_common_display_free(rdp_client->display);
pthread_mutex_unlock(&(rdp_client->rdp_lock));
return 0;
}
