/** * Send a plugin-defined event to the plugin. * called only from main thread * @param channels the channel manager instance * @param event an event object created by freerdp_event_new() */ FREERDP_API int freerdp_channels_send_event(rdpChannels* channels, wMessage* event) { const char* name = NULL; CHANNEL_OPEN_DATA* pChannelOpenData; switch (GetMessageClass(event->id)) { case DebugChannel_Class: name = "rdpdbg"; break; case CliprdrChannel_Class: name = "cliprdr"; break; case TsmfChannel_Class: name = "tsmf"; break; case RailChannel_Class: name = "rail"; break; } if (!name) { DEBUG_CHANNELS("unknown event_class %d", GetMessageClass(event->id)); freerdp_event_free(event); return 1; } pChannelOpenData = freerdp_channels_find_channel_open_data_by_name(channels, name); if (!pChannelOpenData) { DEBUG_CHANNELS("could not find channel name %s", name); freerdp_event_free(event); return 1; } if (pChannelOpenData->pChannelOpenEventProc) { pChannelOpenData->pChannelOpenEventProc(pChannelOpenData->OpenHandle, CHANNEL_EVENT_USER, event, sizeof(wMessage), sizeof(wMessage), 0); } return 0; }
void freerdp_event_free(wMessage* event) { if (event) { if (event->Free) event->Free(event); switch (GetMessageClass(event->id)) { case CliprdrChannel_Class: freerdp_cliprdr_event_free(event); break; case TsmfChannel_Class: freerdp_tsmf_event_free(event); break; case RailChannel_Class: freerdp_rail_event_free(event); break; } free(event); } }
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 remmina_rdp_channels_process_event(RemminaProtocolWidget* gp, wMessage* event) { switch (GetMessageClass(event->id)) { case CliprdrChannel_Class: remmina_rdp_channel_cliprdr_process(gp, event); break; } }
int svc_plugin_send_event(rdpSvcPlugin* plugin, wMessage* event) { UINT32 status = 0; DEBUG_SVC("event class: %d type: %d", GetMessageClass(event->id), GetMessageType(event->id)); status = plugin->channel_entry_points.pVirtualChannelEventPush(plugin->OpenHandle, event); if (status != CHANNEL_RC_OK) fprintf(stderr, "svc_plugin_send_event: VirtualChannelEventPush failed %d\n", status); return status; }
/** * Send a plugin-defined event to the plugin. * called only from main thread * @param channels the channel manager instance * @param event an event object created by freerdp_event_new() */ FREERDP_API int freerdp_channels_send_event(rdpChannels* channels, wMessage* event) { int index; const char* name = NULL; rdpChannelData* lchannel_data; switch (GetMessageClass(event->id)) { case DebugChannel_Class: name = "rdpdbg"; break; case CliprdrChannel_Class: name = "cliprdr"; break; case TsmfChannel_Class: name = "tsmf"; break; case RailChannel_Class: name = "rail"; break; } if (!name) { DEBUG_CHANNELS("unknown event_class %d", event->event_class); freerdp_event_free(event); return 1; } lchannel_data = freerdp_channels_find_channel_data_by_name(channels, name, &index); if (!lchannel_data) { DEBUG_CHANNELS("could not find channel name %s", name); freerdp_event_free(event); return 1; } if (lchannel_data->open_event_proc) { lchannel_data->open_event_proc(lchannel_data->open_handle, CHANNEL_EVENT_USER, event, sizeof(wMessage), sizeof(wMessage), 0); } return 0; }
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); } }
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); } }
/** * 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; }
FreeMemoryThresholdMonitor::FreeMemoryThresholdMonitor( const std::string& source_id, QueryFunction threshold, QueryFunction measured ): GenericThresholdMonitor<int64_t>(source_id, GetResourceId(), GetMessageClass(), threshold, measured ) { }
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; }