//-----------------------------------------------------------------------------
static void process_events_and_channel_data_from_plugin(thread_param* param)
{
RDP_EVENT* event;
param->th_count++;
while (param->th_to_finish == 0)
{
freerdp_channels_check_fds(param->chan_man, param->instance);
while (1)
{
event = freerdp_channels_pop_event(param->chan_man);
if (event == NULL) break;
static int counter = 0;
counter++;
printf("UI receive event. (type=%d counter=%d).\n",
event->event_type,
counter);
// add to global event list
if (param->in_events_number < RAIL_ARRAY_SIZE(param->in_events))
{
save_event(event, ¶m->in_events[param->in_events_number]);
param->in_events_number++;
}
freerdp_event_free(event);
}
usleep(1000);
}
param->th_count--;
}
void rds_process_channel_event(rdpChannels* channels, freerdp* instance)
{
rdsContext* rds;
wMessage* event;
rds = (rdsContext*) instance->context;
event = freerdp_channels_pop_event(channels);
if (event)
{
switch (GetMessageClass(event->id))
{
case RailChannel_Class:
break;
case TsmfChannel_Class:
break;
case CliprdrChannel_Class:
break;
case RdpeiChannel_Class:
break;
default:
break;
}
freerdp_event_free(event);
}
}
void test_channels(void)
{
rdpChannels* chan_man;
rdpSettings settings = { 0 };
freerdp instance = { 0 };
RDP_EVENT* event;
settings.hostname = "testhost";
instance.settings = &settings;
instance.SendChannelData = test_rdp_channel_data;
chan_man = freerdp_channels_new();
freerdp_channels_load_plugin(chan_man, &settings, "../channels/rdpdbg/rdpdbg.so", NULL);
freerdp_channels_pre_connect(chan_man, &instance);
freerdp_channels_post_connect(chan_man, &instance);
freerdp_channels_data(&instance, 0, "testdata", 8, CHANNEL_FLAG_FIRST | CHANNEL_FLAG_LAST, 8);
freerdp_channels_data(&instance, 0, "testdata1", 9, CHANNEL_FLAG_FIRST | CHANNEL_FLAG_LAST, 9);
freerdp_channels_data(&instance, 0, "testdata11", 10, CHANNEL_FLAG_FIRST | CHANNEL_FLAG_LAST, 10);
freerdp_channels_data(&instance, 0, "testdata111", 11, CHANNEL_FLAG_FIRST | CHANNEL_FLAG_LAST, 11);
event = freerdp_event_new(RDP_EVENT_CLASS_DEBUG, 0, NULL, NULL);
freerdp_channels_send_event(chan_man, event);
while ((event = freerdp_channels_pop_event(chan_man)) == NULL)
{
freerdp_channels_check_fds(chan_man, &instance);
}
printf("responded event_type %d\n", event->event_type);
freerdp_event_free(event);
freerdp_channels_close(chan_man, &instance);
freerdp_channels_free(chan_man);
}
void wf_process_channel_event(rdpChannels* channels, freerdp* instance)
{
RDP_EVENT* event;
event = freerdp_channels_pop_event(channels);
if (event)
freerdp_event_free(event);
}
void tf_process_channel_event(rdpChannels* channels, freerdp* instance)
{
RDP_EVENT* event;
event = freerdp_channels_pop_event(channels);
if (event)
{
switch (event->event_type)
{
case RDP_EVENT_TYPE_CB_MONITOR_READY:
tf_process_cb_monitor_ready_event(channels, instance);
break;
default:
printf("tf_process_channel_event: unknown event type %d\n", event->event_type);
break;
}
freerdp_event_free(event);
}
}
void android_process_channel_event(rdpChannels* channels, freerdp* instance)
{
wMessage* event;
event = freerdp_channels_pop_event(channels);
if (event)
{
switch(GetMessageClass(event->id))
{
case CliprdrChannel_Class:
android_process_cliprdr_event(instance, event);
break;
default:
break;
}
freerdp_event_free(event);
}
}
void tf_process_channel_event(rdpChannels* channels, freerdp* instance)
{
wMessage* event;
event = freerdp_channels_pop_event(channels);
if (event)
{
switch (GetMessageType(event->id))
{
case CliprdrChannel_MonitorReady:
tf_process_cb_monitor_ready_event(channels, instance);
break;
default:
printf("tf_process_channel_event: unknown event type %d\n", GetMessageType(event->id));
break;
}
freerdp_event_free(event);
}
}
static void android_process_channel_event(rdpChannels* channels, freerdp* instance)
{
wMessage* event;
event = freerdp_channels_pop_event(channels);
if (event)
{
int ev = GetMessageClass(event->id);
switch(ev)
{
case CliprdrChannel_Class:
android_process_cliprdr_event(instance, event);
break;
default:
DEBUG_ANDROID("Unsupported channel event %08X", ev);
break;
}
freerdp_event_free(event);
}
}
void wf_process_channel_event(rdpChannels* channels, freerdp* instance)
{
wfContext* wfc;
wMessage* event;
wfc = (wfContext*) instance->context;
event = freerdp_channels_pop_event(channels);
if (event)
{
switch (GetMessageClass(event->id))
{
case CliprdrChannel_Class:
wf_process_cliprdr_event(wfc, event);
break;
default:
break;
}
freerdp_event_free(event);
}
}
void test_cliprdr(void)
{
int i;
rdpChannels* channels;
rdpSettings settings = { 0 };
freerdp instance = { 0 };
RDP_EVENT* event;
RDP_CB_FORMAT_LIST_EVENT* format_list_event;
RDP_CB_DATA_REQUEST_EVENT* data_request_event;
RDP_CB_DATA_RESPONSE_EVENT* data_response_event;
settings.hostname = "testhost";
instance.settings = &settings;
instance.SendChannelData = test_rdp_channel_data;
channels = freerdp_channels_new();
freerdp_channels_load_plugin(channels, &settings, "../channels/cliprdr/cliprdr.so", NULL);
freerdp_channels_pre_connect(channels, &instance);
freerdp_channels_post_connect(channels, &instance);
/* server sends cliprdr capabilities and monitor ready PDU */
freerdp_channels_data(&instance, 0, (char*)test_clip_caps_data, sizeof(test_clip_caps_data) - 1,
CHANNEL_FLAG_FIRST | CHANNEL_FLAG_LAST, sizeof(test_clip_caps_data) - 1);
freerdp_channels_data(&instance, 0, (char*)test_monitor_ready_data, sizeof(test_monitor_ready_data) - 1,
CHANNEL_FLAG_FIRST | CHANNEL_FLAG_LAST, sizeof(test_monitor_ready_data) - 1);
/* cliprdr sends clipboard_sync event to UI */
while ((event = freerdp_channels_pop_event(channels)) == NULL)
{
freerdp_channels_check_fds(channels, &instance);
}
printf("Got event %d\n", event->event_type);
CU_ASSERT(event->event_type == RDP_EVENT_TYPE_CB_MONITOR_READY);
freerdp_event_free(event);
/* UI sends format_list event to cliprdr */
event = freerdp_event_new(RDP_EVENT_CLASS_CLIPRDR, RDP_EVENT_TYPE_CB_FORMAT_LIST, event_process_callback, NULL);
format_list_event = (RDP_CB_FORMAT_LIST_EVENT*) event;
format_list_event->num_formats = 2;
format_list_event->formats = (uint32*) xmalloc(sizeof(uint32) * 2);
format_list_event->formats[0] = CB_FORMAT_TEXT;
format_list_event->formats[1] = CB_FORMAT_HTML;
event_processed = 0;
freerdp_channels_send_event(channels, event);
/* cliprdr sends format list PDU to server */
while (!event_processed)
{
freerdp_channels_check_fds(channels, &instance);
}
/* server sends format list response PDU to cliprdr */
freerdp_channels_data(&instance, 0, (char*)test_format_list_response_data, sizeof(test_format_list_response_data) - 1,
CHANNEL_FLAG_FIRST | CHANNEL_FLAG_LAST, sizeof(test_format_list_response_data) - 1);
/* server sends format list PDU to cliprdr */
freerdp_channels_data(&instance, 0, (char*)test_format_list_data, sizeof(test_format_list_data) - 1,
CHANNEL_FLAG_FIRST | CHANNEL_FLAG_LAST, sizeof(test_format_list_data) - 1);
/* cliprdr sends format_list event to UI */
while ((event = freerdp_channels_pop_event(channels)) == NULL)
{
freerdp_channels_check_fds(channels, &instance);
}
printf("Got event %d\n", event->event_type);
CU_ASSERT(event->event_type == RDP_EVENT_TYPE_CB_FORMAT_LIST);
if (event->event_type == RDP_EVENT_TYPE_CB_FORMAT_LIST)
{
format_list_event = (RDP_CB_FORMAT_LIST_EVENT*)event;
for (i = 0; i < format_list_event->num_formats; i++)
printf("Format: 0x%X\n", format_list_event->formats[i]);
}
freerdp_event_free(event);
/* server sends data request PDU to cliprdr */
freerdp_channels_data(&instance, 0, (char*)test_data_request_data, sizeof(test_data_request_data) - 1,
CHANNEL_FLAG_FIRST | CHANNEL_FLAG_LAST, sizeof(test_data_request_data) - 1);
/* cliprdr sends data request event to UI */
while ((event = freerdp_channels_pop_event(channels)) == NULL)
{
freerdp_channels_check_fds(channels, &instance);
}
printf("Got event %d\n", event->event_type);
CU_ASSERT(event->event_type == RDP_EVENT_TYPE_CB_DATA_REQUEST);
if (event->event_type == RDP_EVENT_TYPE_CB_DATA_REQUEST)
{
data_request_event = (RDP_CB_DATA_REQUEST_EVENT*)event;
printf("Requested format: 0x%X\n", data_request_event->format);
}
freerdp_event_free(event);
/* UI sends data response event to cliprdr */
event = freerdp_event_new(RDP_EVENT_CLASS_CLIPRDR, RDP_EVENT_TYPE_CB_DATA_RESPONSE, event_process_callback, NULL);
data_response_event = (RDP_CB_DATA_RESPONSE_EVENT*)event;
data_response_event->data = (uint8*)xmalloc(6);
strcpy((char*)data_response_event->data, "hello");
data_response_event->size = 6;
event_processed = 0;
freerdp_channels_send_event(channels, event);
/* cliprdr sends data response PDU to server */
while (!event_processed)
{
freerdp_channels_check_fds(channels, &instance);
}
/* UI sends data request event to cliprdr */
event = freerdp_event_new(RDP_EVENT_CLASS_CLIPRDR, RDP_EVENT_TYPE_CB_DATA_REQUEST, event_process_callback, NULL);
data_request_event = (RDP_CB_DATA_REQUEST_EVENT*)event;
data_request_event->format = CB_FORMAT_UNICODETEXT;
event_processed = 0;
freerdp_channels_send_event(channels, event);
/* cliprdr sends data request PDU to server */
while (!event_processed)
{
freerdp_channels_check_fds(channels, &instance);
}
/* server sends data response PDU to cliprdr */
freerdp_channels_data(&instance, 0, (char*)test_data_response_data, sizeof(test_data_response_data) - 1,
CHANNEL_FLAG_FIRST | CHANNEL_FLAG_LAST, sizeof(test_data_response_data) - 1);
/* cliprdr sends data response event to UI */
while ((event = freerdp_channels_pop_event(channels)) == NULL)
{
freerdp_channels_check_fds(channels, &instance);
}
printf("Got event %d\n", event->event_type);
CU_ASSERT(event->event_type == RDP_EVENT_TYPE_CB_DATA_RESPONSE);
if (event->event_type == RDP_EVENT_TYPE_CB_DATA_RESPONSE)
{
data_response_event = (RDP_CB_DATA_RESPONSE_EVENT*)event;
printf("Data response size: %d\n", data_response_event->size);
freerdp_hexdump(data_response_event->data, data_response_event->size);
}
freerdp_event_free(event);
freerdp_channels_close(channels, &instance);
freerdp_channels_free(channels);
}
/**
* 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 */
rdp_client->keyboard = guac_rdp_keyboard_alloc(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);
/* Wait again if frame remaining */
else if (frame_remaining > 0)
wait_result = rdp_guac_client_wait_for_messages(client,
GUAC_RDP_FRAME_TIMEOUT);
else
break;
} while (wait_result > 0);
/* Record end of frame, excluding server-side rendering time (we
* assume server-side rendering time will be consistent between any
* two subsequent frames, and that this time should thus be
* excluded from the required wait period of the next frame). */
last_frame_end = frame_start;
}
/* If an error occurred, fail */
if (wait_result < 0)
guac_client_abort(client, GUAC_PROTOCOL_STATUS_UPSTREAM_ERROR,
"Connection closed.");
/* Flush frame */
guac_common_display_flush(rdp_client->display);
guac_client_end_frame(client);
guac_socket_flush(client->socket);
}
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 RDP keyboard state */
guac_rdp_keyboard_free(rdp_client->keyboard);
/* Free display */
guac_common_display_free(rdp_client->display);
pthread_mutex_unlock(&(rdp_client->rdp_lock));
/* Client is now disconnected */
guac_client_log(client, GUAC_LOG_INFO, "Internal RDP client disconnected");
return 0;
}
static void remmina_rdp_main_loop(RemminaProtocolWidget* gp)
{
int i;
int fds;
int rcount;
int wcount;
int max_fds;
void *rfds[32];
void *wfds[32];
fd_set rfds_set;
fd_set wfds_set;
rfContext* rfi;
wMessage* event;
memset(rfds, 0, sizeof(rfds));
memset(wfds, 0, sizeof(wfds));
rfi = GET_DATA(gp);
while (1)
{
rcount = 0;
wcount = 0;
if (!freerdp_get_fds(rfi->instance, rfds, &rcount, wfds, &wcount))
{
break;
}
if (!freerdp_channels_get_fds(rfi->channels, rfi->instance, rfds, &rcount, wfds, &wcount))
{
break;
}
rf_get_fds(gp, rfds, &rcount);
max_fds = 0;
FD_ZERO(&rfds_set);
for (i = 0; i < rcount; i++)
{
fds = (int) (UINT64) (rfds[i]);
if (fds > max_fds)
max_fds = fds;
FD_SET(fds, &rfds_set);
}
FD_ZERO(&wfds_set);
for (i = 0; i < wcount; i++)
{
fds = GPOINTER_TO_INT(wfds[i]);
if (fds > max_fds)
max_fds = fds;
FD_SET(fds, &wfds_set);
}
/* exit if nothing to do */
if (max_fds == 0)
{
break;
}
/* do the wait */
if (select(max_fds + 1, &rfds_set, &wfds_set, NULL, NULL) == -1)
{
/* these are not really errors */
if (!((errno == EAGAIN) ||
(errno == EWOULDBLOCK) ||
(errno == EINPROGRESS) ||
(errno == EINTR))) /* signal occurred */
{
break;
}
}
/* check the libfreerdp fds */
if (!freerdp_check_fds(rfi->instance))
{
break;
}
/* check channel fds */
if (!freerdp_channels_check_fds(rfi->channels, rfi->instance))
{
break;
}
else
{
event = freerdp_channels_pop_event(rfi->channels);
if (event)
remmina_rdp_channels_process_event(gp, event);
}
/* check ui */
if (!rf_check_fds(gp))
{
break;
}
}
}
static int rdp_guac_client_wait_for_messages(guac_client* client, int timeout_usecs) {
rdp_guac_client_data* guac_client_data = (rdp_guac_client_data*) client->data;
freerdp* rdp_inst = guac_client_data->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;
}
int rdp_guac_client_handle_messages(guac_client* client) {
rdp_guac_client_data* guac_client_data = (rdp_guac_client_data*) client->data;
freerdp* rdp_inst = guac_client_data->rdp_inst;
rdpChannels* channels = rdp_inst->context->channels;
wMessage* event;
/* Wait for messages */
int wait_result = rdp_guac_client_wait_for_messages(client, 250000);
guac_timestamp frame_start = guac_timestamp_current();
while (wait_result > 0) {
guac_timestamp frame_end;
int frame_remaining;
pthread_mutex_lock(&(guac_client_data->rdp_lock));
/* Check the libfreerdp fds */
if (!freerdp_check_fds(rdp_inst)) {
guac_error = GUAC_STATUS_BAD_STATE;
guac_error_message = "Error handling RDP file descriptors";
pthread_mutex_unlock(&(guac_client_data->rdp_lock));
return 1;
}
/* Check channel fds */
if (!freerdp_channels_check_fds(channels, rdp_inst)) {
guac_error = GUAC_STATUS_BAD_STATE;
guac_error_message = "Error handling RDP channel file descriptors";
pthread_mutex_unlock(&(guac_client_data->rdp_lock));
return 1;
}
/* Check for channel events */
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_error = GUAC_STATUS_NO_INPUT;
guac_error_message = "RDP server closed connection";
pthread_mutex_unlock(&(guac_client_data->rdp_lock));
return 1;
}
pthread_mutex_unlock(&(guac_client_data->rdp_lock));
/* Calculate time remaining in frame */
frame_end = guac_timestamp_current();
frame_remaining = frame_start + GUAC_RDP_FRAME_DURATION - frame_end;
/* Wait again if frame remaining */
if (frame_remaining > 0)
wait_result = rdp_guac_client_wait_for_messages(client,
GUAC_RDP_FRAME_TIMEOUT*1000);
else
break;
}
/* If an error occurred, fail */
if (wait_result < 0)
return 1;
/* Success */
guac_common_surface_flush(guac_client_data->default_surface);
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;
}