path: root/lib/avtp_pipeline/acmp/openavb_acmp_sm_listener.c

/*************************************************************************************************************
Copyright (c) 2012-2015, Symphony Teleca Corporation, a Harman International Industries, Incorporated company
Copyright (c) 2016-2017, Harman International Industries, Incorporated
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

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   list of conditions and the following disclaimer.
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   this list of conditions and the following disclaimer in the documentation
   and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS LISTED "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS LISTED BE LIABLE FOR
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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Attributions: The inih library portion of the source code is licensed from
Brush Technology and Ben Hoyt - Copyright (c) 2009, Brush Technology and Copyright (c) 2009, Ben Hoyt.
Complete license and copyright information can be found at
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*************************************************************************************************************/

/*
 ******************************************************************
 * MODULE : ACMP - AVDECC Connection Management Protocol : Listener State Machine
 * MODULE SUMMARY : Implements the ACMP - AVDECC Connection Management Protocol : Listener State Machine
 * IEEE Std 1722.1-2013 clause 8.2.2.5
 ******************************************************************
 */

#include "openavb_platform.h"

#include <errno.h>

#define	AVB_LOG_COMPONENT	"ACMP"
#include "openavb_log.h"

#include "openavb_debug.h"
#include "openavb_time.h"
#include "openavb_aem.h"
#include "openavb_acmp.h"
#include "openavb_acmp_message.h"
#include "openavb_acmp_sm_talker.h"
#include "openavb_acmp_sm_listener.h"
#include "openavb_avdecc_pipeline_interaction_pub.h"
#include "openavb_time.h"

typedef enum {
	OPENAVB_ACMP_SM_LISTENER_STATE_WAITING,
	OPENAVB_ACMP_SM_LISTENER_STATE_CONNECT_RX_COMMAND,
	OPENAVB_ACMP_SM_LISTENER_STATE_CONNECT_TX_RESPONSE,
	OPENAVB_ACMP_SM_LISTENER_STATE_GET_STATE,
	OPENAVB_ACMP_SM_LISTENER_STATE_DISCONNECT_RX_COMMAND,
	OPENAVB_ACMP_SM_LISTENER_STATE_DISCONNECT_TX_RESPONSE,
	OPENAVB_ACMP_SM_LISTENER_STATE_CONNECT_TX_TIMEOUT,
	OPENAVB_ACMP_SM_LISTENER_STATE_DISCONNECT_TX_TIMEOUT,
} openavb_acmp_sm_listener_state_t;

extern openavb_avdecc_cfg_t gAvdeccCfg;
extern openavb_acmp_sm_global_vars_t openavbAcmpSMGlobalVars;

static openavb_acmp_ACMPCommandResponse_t rcvdCmdResp;
static openavb_acmp_ACMPCommandResponse_t *pRcvdCmdResp = &rcvdCmdResp;
static openavb_acmp_sm_listener_vars_t openavbAcmpSMListenerVars = {0};
static bool bRunning = FALSE;

extern MUTEX_HANDLE(openavbAcmpMutex);
#define ACMP_LOCK() { MUTEX_CREATE_ERR(); MUTEX_LOCK(openavbAcmpMutex); MUTEX_LOG_ERR("Mutex lock failure"); }
#define ACMP_UNLOCK() { MUTEX_CREATE_ERR(); MUTEX_UNLOCK(openavbAcmpMutex); MUTEX_LOG_ERR("Mutex unlock failure"); }

static MUTEX_HANDLE(openavbAcmpSMListenerMutex);
#define ACMP_SM_LOCK() { MUTEX_CREATE_ERR(); MUTEX_LOCK(openavbAcmpSMListenerMutex); MUTEX_LOG_ERR("Mutex lock failure"); }
#define ACMP_SM_UNLOCK() { MUTEX_CREATE_ERR(); MUTEX_UNLOCK(openavbAcmpSMListenerMutex); MUTEX_LOG_ERR("Mutex unlock failure"); }

SEM_T(openavbAcmpSMListenerSemaphore);
THREAD_TYPE(openavbAcmpSmListenerThread);
THREAD_DEFINITON(openavbAcmpSmListenerThread);

openavb_list_node_t openavbAcmpSMListener_findInflightNodeFromCommand(openavb_acmp_ACMPCommandResponse_t *command)
{
	AVB_TRACE_ENTRY(AVB_TRACE_ACMP);

	openavb_list_node_t node = NULL;

	node = openavbListIterFirst(openavbAcmpSMListenerVars.inflight);
	while (node) {
		openavb_acmp_InflightCommand_t *pInFlightCommand = openavbListData(node);
		if (pInFlightCommand) {
			if (memcmp(pInFlightCommand->command.talker_entity_id, command->talker_entity_id, sizeof(pInFlightCommand->command.talker_entity_id)) == 0) {
				if (pInFlightCommand->command.talker_unique_id == command->talker_unique_id ) {
					if (pInFlightCommand->command.sequence_id == command->sequence_id) {
						break;
					}
				}
			}
		}
		node = openavbListIterNext(openavbAcmpSMListenerVars.inflight);
	}

	AVB_TRACE_EXIT(AVB_TRACE_ACMP);
	return node;
}

bool openavbAcmpSMListener_validListenerUnique(U16 listenerUniqueId)
{
	AVB_TRACE_ENTRY(AVB_TRACE_ACMP);

	if (!openavbAemGetDescriptor(openavbAemGetConfigIdx(), OPENAVB_AEM_DESCRIPTOR_STREAM_INPUT, listenerUniqueId)) {
		AVB_TRACE_EXIT(AVB_TRACE_ACMP);
		return FALSE;
	}

	AVB_TRACE_EXIT(AVB_TRACE_ACMP);
	return TRUE;
}

bool openavbAcmpSMListener_listenerIsConnected(openavb_acmp_ACMPCommandResponse_t *command)
{
	AVB_TRACE_ENTRY(AVB_TRACE_ACMP);
	bool bResult = FALSE;

	// Returns TRUE if listener is connected to a stream source other than the one specified in the command.
	openavb_acmp_ListenerStreamInfo_t *pListenerStreamInfo = openavbArrayDataIdx(openavbAcmpSMListenerVars.listenerStreamInfos, command->listener_unique_id);
	if (pListenerStreamInfo) {
		if (pListenerStreamInfo->connected) {
			bResult = TRUE;
			if (memcmp(pListenerStreamInfo->talker_entity_id, command->talker_entity_id, sizeof(command->talker_entity_id)) == 0) {
				if (pListenerStreamInfo->talker_unique_id == command->talker_unique_id) {
					bResult = FALSE;
				}
			}
		}
	}

	AVB_TRACE_EXIT(AVB_TRACE_ACMP);
	return bResult;
}

bool openavbAcmpSMListener_listenerIsConnectedTo(openavb_acmp_ACMPCommandResponse_t *command)
{
	AVB_TRACE_ENTRY(AVB_TRACE_ACMP);
	bool bResult = FALSE;

	// Returns TRUE if listener is connected to the stream source specified in the command.
	openavb_acmp_ListenerStreamInfo_t *pListenerStreamInfo = openavbArrayDataIdx(openavbAcmpSMListenerVars.listenerStreamInfos, command->listener_unique_id);
	if (pListenerStreamInfo) {
		if (pListenerStreamInfo->connected) {
			if (memcmp(pListenerStreamInfo->talker_entity_id, command->talker_entity_id, sizeof(command->talker_entity_id)) == 0) {
				if (pListenerStreamInfo->talker_unique_id == command->talker_unique_id) {
					bResult = TRUE;
				}
			}
		}
	}

	AVB_TRACE_EXIT(AVB_TRACE_ACMP);
	return bResult;
}

void openavbAcmpSMListener_txCommand(U8 messageType, openavb_acmp_ACMPCommandResponse_t *command, bool retry)
{
	AVB_TRACE_ENTRY(AVB_TRACE_ACMP);
	openavb_list_node_t node = NULL;

	openavbRC rc = openavbAcmpMessageSend(messageType, command, OPENAVB_ACMP_STATUS_SUCCESS);
	if (IS_OPENAVB_SUCCESS(rc)) {
		if (!retry) {
			node = openavbListNew(openavbAcmpSMListenerVars.inflight, sizeof(openavb_acmp_InflightCommand_t));
			if (node) {
				openavb_acmp_InflightCommand_t *pInFlightCommand = openavbListData(node);
				if (pInFlightCommand) {

					memcpy(&pInFlightCommand->command, command, sizeof(pInFlightCommand->command));
					pInFlightCommand->command.message_type = messageType;
					pInFlightCommand->retried = FALSE;
					pInFlightCommand->original_sequence_id = command->sequence_id;	// AVDECC_TODO - is this correct?

					CLOCK_GETTIME(OPENAVB_CLOCK_REALTIME, &pInFlightCommand->timer);
					switch (messageType) {
						case OPENAVB_ACMP_MESSAGE_TYPE_CONNECT_TX_COMMAND:
							openavbTimeTimespecAddUsec(&pInFlightCommand->timer, OPENAVB_ACMP_COMMAND_TIMEOUT_CONNECT_TX_COMMAND * MICROSECONDS_PER_MSEC);
							break;
						case OPENAVB_ACMP_MESSAGE_TYPE_DISCONNECT_TX_COMMAND:
							openavbTimeTimespecAddUsec(&pInFlightCommand->timer, OPENAVB_ACMP_COMMAND_TIMEOUT_DISCONNECT_TX_COMMAND * MICROSECONDS_PER_MSEC);
							break;
						default:
							AVB_LOGF_ERROR("Unsupported command %u in openavbAcmpSMListener_txCommand", messageType);
							openavbTimeTimespecAddUsec(&pInFlightCommand->timer, OPENAVB_ACMP_COMMAND_TIMEOUT_CONNECT_RX_COMMAND * MICROSECONDS_PER_MSEC);
							break;
					}
				}
			}
		}
		else {
			// Retry case
			node = openavbAcmpSMListener_findInflightNodeFromCommand(command);
			if (node) {
				openavb_acmp_InflightCommand_t *pInFlightCommand = openavbListData(node);
				if (pInFlightCommand) {
					pInFlightCommand->retried = TRUE;

					CLOCK_GETTIME(OPENAVB_CLOCK_REALTIME, &pInFlightCommand->timer);
					switch (messageType) {
						case OPENAVB_ACMP_MESSAGE_TYPE_CONNECT_TX_COMMAND:
							openavbTimeTimespecAddUsec(&pInFlightCommand->timer, OPENAVB_ACMP_COMMAND_TIMEOUT_CONNECT_TX_COMMAND * MICROSECONDS_PER_MSEC);
							break;
						case OPENAVB_ACMP_MESSAGE_TYPE_DISCONNECT_TX_COMMAND:
							openavbTimeTimespecAddUsec(&pInFlightCommand->timer, OPENAVB_ACMP_COMMAND_TIMEOUT_DISCONNECT_TX_COMMAND * MICROSECONDS_PER_MSEC);
							break;
						default:
							AVB_LOGF_ERROR("Unsupported command %u in openavbAcmpSMListener_txCommand", messageType);
							openavbTimeTimespecAddUsec(&pInFlightCommand->timer, OPENAVB_ACMP_COMMAND_TIMEOUT_CONNECT_RX_COMMAND * MICROSECONDS_PER_MSEC);
							break;
					}
				}
			}
		}
	}
	else {
		// Failed to send command
		openavbAcmpSMListener_txResponse(messageType + 1, command, OPENAVB_ACMP_STATUS_COULD_NOT_SEND_MESSAGE);
		if (retry) {
			node = openavbAcmpSMListener_findInflightNodeFromCommand(command);
			if (node) {
				openavbListDelete(openavbAcmpSMListenerVars.inflight, node);
			}
		}
	}

	AVB_TRACE_EXIT(AVB_TRACE_ACMP);
}

void openavbAcmpSMListener_txResponse(U8 messageType, openavb_acmp_ACMPCommandResponse_t *response, U8 error)
{
	AVB_TRACE_ENTRY(AVB_TRACE_ACMP);
	openavbAcmpMessageSend(messageType, response, error);
	AVB_TRACE_EXIT(AVB_TRACE_ACMP);
}

U8 openavbAcmpSMListener_connectListener(openavb_acmp_ACMPCommandResponse_t *response)
{
	AVB_TRACE_ENTRY(AVB_TRACE_ACMP);
	U8 retStatus;

	// AVDECC_TODO:  What do we do if the Listener is already connected?

	openavb_acmp_ListenerStreamInfo_t *pListenerStreamInfo = openavbArrayDataIdx(openavbAcmpSMListenerVars.listenerStreamInfos, response->listener_unique_id);
	if (pListenerStreamInfo) {
		memcpy(pListenerStreamInfo->stream_id, response->stream_id, sizeof(pListenerStreamInfo->stream_id));
		memcpy(pListenerStreamInfo->controller_entity_id, response->controller_entity_id, sizeof(pListenerStreamInfo->controller_entity_id));
		memcpy(pListenerStreamInfo->talker_entity_id, response->talker_entity_id, sizeof(pListenerStreamInfo->talker_entity_id));
		pListenerStreamInfo->talker_unique_id = response->talker_unique_id;
		memcpy(pListenerStreamInfo->stream_dest_mac, response->stream_dest_mac, sizeof(pListenerStreamInfo->stream_dest_mac));
		pListenerStreamInfo->connected = TRUE;
		pListenerStreamInfo->flags = response->flags;
		pListenerStreamInfo->stream_vlan_id = response->stream_vlan_id;

		U16 configIdx = openavbAemGetConfigIdx();
		openavb_aem_descriptor_stream_io_t *pDescriptorStreamInput = openavbAemGetDescriptor(configIdx, OPENAVB_AEM_DESCRIPTOR_STREAM_INPUT, response->listener_unique_id);

		// AVDECC_TODO:  Verify that the pDescriptorStreamInput->stream details match that of pListenerStreamInfo.

		if (!pDescriptorStreamInput) {
			retStatus = OPENAVB_ACMP_STATUS_LISTENER_UNKNOWN_ID;
		}
		else if (openavbAVDECCRunListener(pDescriptorStreamInput, configIdx, pListenerStreamInfo)) {
			retStatus = OPENAVB_ACMP_STATUS_SUCCESS;
		}
		else {
			retStatus = OPENAVB_ACMP_STATUS_LISTENER_MISBEHAVING;
		}
	}
	else {
		retStatus = OPENAVB_ACMP_STATUS_LISTENER_UNKNOWN_ID;
	}

	// AVDECC_TODO - any flags need to be updated in the response?

	AVB_TRACE_EXIT(AVB_TRACE_ACMP);
	return retStatus;
}

U8 openavbAcmpSMListener_disconnectListener(openavb_acmp_ACMPCommandResponse_t *response)
{
	AVB_TRACE_ENTRY(AVB_TRACE_ACMP);
	U8 retStatus;

	openavb_acmp_ListenerStreamInfo_t *pListenerStreamInfo = openavbArrayDataIdx(openavbAcmpSMListenerVars.listenerStreamInfos, response->listener_unique_id);
	if (pListenerStreamInfo) {
		U16 configIdx = openavbAemGetConfigIdx();
		openavb_aem_descriptor_stream_io_t *pDescriptorStreamInput = openavbAemGetDescriptor(configIdx, OPENAVB_AEM_DESCRIPTOR_STREAM_INPUT, response->listener_unique_id);

		// AVDECC_TODO:  Verify that the pDescriptorStreamInput->stream details match that of pListenerStreamInfo.

		if (!pDescriptorStreamInput) {
			retStatus = OPENAVB_ACMP_STATUS_LISTENER_UNKNOWN_ID;
		}
		else if (openavbAVDECCStopListener(pDescriptorStreamInput, configIdx, pListenerStreamInfo)) {
			retStatus = OPENAVB_ACMP_STATUS_SUCCESS;
		}
		else {
			retStatus = OPENAVB_ACMP_STATUS_LISTENER_MISBEHAVING;
		}
		memset(pListenerStreamInfo, 0, sizeof(*pListenerStreamInfo));
	}
	else {
		retStatus = OPENAVB_ACMP_STATUS_LISTENER_UNKNOWN_ID;
	}

	// AVDECC_TODO - any flags need to be updated in the response?

	AVB_TRACE_EXIT(AVB_TRACE_ACMP);
	return retStatus;
}

void openavbAcmpSMListener_cancelTimeout(openavb_acmp_ACMPCommandResponse_t *commandResponse)
{
	AVB_TRACE_ENTRY(AVB_TRACE_ACMP);
	// Nothing to do since the timer is reset during the wait state and the inFlight entry will have already been removed.
	AVB_TRACE_EXIT(AVB_TRACE_ACMP);
}

void openavbAcmpSMListener_removeInflight(openavb_acmp_ACMPCommandResponse_t *commandResponse)
{
	AVB_TRACE_ENTRY(AVB_TRACE_ACMP);
	openavb_list_node_t node = openavbAcmpSMListener_findInflightNodeFromCommand(commandResponse);
	if (node) {
		openavbListDelete(openavbAcmpSMListenerVars.inflight, node);
	}

	AVB_TRACE_EXIT(AVB_TRACE_ACMP);
}

U8 openavbAcmpSMListener_getState(openavb_acmp_ACMPCommandResponse_t *command)
{
	AVB_TRACE_ENTRY(AVB_TRACE_ACMP);

	U8 retStatus = OPENAVB_ACMP_STATUS_LISTENER_MISBEHAVING;

	openavb_acmp_ListenerStreamInfo_t *pListenerStreamInfo = openavbArrayDataIdx(openavbAcmpSMListenerVars.listenerStreamInfos, command->listener_unique_id);
	if (pListenerStreamInfo) {
		memcpy(command->stream_id, pListenerStreamInfo->stream_id, sizeof(command->stream_id));
		memcpy(command->talker_entity_id, pListenerStreamInfo->talker_entity_id, sizeof(command->talker_entity_id));
		command->talker_unique_id = pListenerStreamInfo->talker_unique_id;
		//command->listener_unique_id = command->listener_unique_id;				// Overwriting data in passed in structure
		memcpy(command->stream_dest_mac, pListenerStreamInfo->stream_dest_mac, sizeof(command->stream_dest_mac));
		command->connection_count = pListenerStreamInfo->connected ? 1 : 0;			// AVDECC_TODO - questionable information in spec.
		command->flags = pListenerStreamInfo->flags;
		command->stream_vlan_id = pListenerStreamInfo->stream_vlan_id;
		retStatus = OPENAVB_ACMP_STATUS_SUCCESS;
	}

	AVB_TRACE_EXIT(AVB_TRACE_ACMP);
	return retStatus;
}

void openavbAcmpSMListenerStateMachine()
{
	AVB_TRACE_ENTRY(AVB_TRACE_ACMP);

	openavb_acmp_InflightCommand_t *pInflightActive = NULL;		// The inflight command for the current state
	openavb_acmp_sm_listener_state_t state = OPENAVB_ACMP_SM_LISTENER_STATE_WAITING;

	// Lock such that the mutex is held unless waiting for a semaphore. Synchronous processing of command responses.
	ACMP_SM_LOCK();
	while (bRunning) {
		switch (state) {
			case OPENAVB_ACMP_SM_LISTENER_STATE_WAITING:
				AVB_TRACE_LINE(AVB_TRACE_ACMP);
				AVB_LOG_DEBUG("State:  OPENAVB_ACMP_SM_LISTENER_STATE_WAITING");

				openavbAcmpSMListenerVars.rcvdConnectRXCmd = FALSE;
				openavbAcmpSMListenerVars.rcvdDisconnectRXCmd = FALSE;
				openavbAcmpSMListenerVars.rcvdConnectTXResp = FALSE;
				openavbAcmpSMListenerVars.rcvdDisconnectTXResp = FALSE;
				openavbAcmpSMListenerVars.rcvdGetRXState = FALSE;

				// Wait for a change in state
				while (state == OPENAVB_ACMP_SM_LISTENER_STATE_WAITING && bRunning) {
					AVB_TRACE_LINE(AVB_TRACE_ACMP);

					// Calculate timeout for inflight commands
					// Start is a arbitrary large time out.
					struct timespec timeout;
					CLOCK_GETTIME(OPENAVB_CLOCK_REALTIME, &timeout);
					timeout.tv_sec += 60;	// At most will timeout after 60 seconds

					// Look for soonest inflight command timeout
					openavb_list_node_t node = openavbListIterFirst(openavbAcmpSMListenerVars.inflight);
					while (node) {
						openavb_acmp_InflightCommand_t *pInflight = openavbListData(node);
						if ((openavbTimeTimespecCmp(&pInflight->timer, &timeout) < 0)) {
							timeout.tv_sec = pInflight->timer.tv_sec;
							timeout.tv_nsec = pInflight->timer.tv_nsec;
						}
						node = openavbListIterNext(openavbAcmpSMListenerVars.inflight);
					}

					ACMP_SM_UNLOCK();
					U32 timeoutMSec = 0;
					struct timespec now;
					CLOCK_GETTIME(OPENAVB_CLOCK_REALTIME, &now);
					timeoutMSec = openavbTimeUntilMSec(&now, &timeout);
					SEM_ERR_T(err);
					SEM_TIMEDWAIT(openavbAcmpSMListenerSemaphore, timeoutMSec, err);
					ACMP_SM_LOCK();

					if (!SEM_IS_ERR_NONE(err)) {
						if (SEM_IS_ERR_TIMEOUT(err)) {
							struct timespec now;
							CLOCK_GETTIME(OPENAVB_CLOCK_REALTIME, &now);

							// Look for a timed out inflight command
							openavb_list_node_t node = openavbListIterFirst(openavbAcmpSMListenerVars.inflight);
							while (node) {
								openavb_acmp_InflightCommand_t *pInflight = openavbListData(node);
								if ((openavbTimeTimespecCmp(&now, &pInflight->timer) >= 0)) {
									// Found a timed out command
									if (pInflight->command.message_type == OPENAVB_ACMP_MESSAGE_TYPE_CONNECT_TX_COMMAND) {
										state = OPENAVB_ACMP_SM_LISTENER_STATE_CONNECT_TX_TIMEOUT;
										pInflightActive = pInflight;
									}
									else if (pInflight->command.message_type == OPENAVB_ACMP_MESSAGE_TYPE_DISCONNECT_TX_COMMAND) {
										state = OPENAVB_ACMP_SM_LISTENER_STATE_DISCONNECT_TX_TIMEOUT;
										pInflightActive = pInflight;
									}
									else {
										AVB_LOGF_ERROR("Unrecognized listener timeout command %u", pInflight->command.message_type);
										bRunning = FALSE;
									}
									break;
								}
								node = openavbListIterNext(openavbAcmpSMListenerVars.inflight);
							}
						}
					}
					else {
						if (openavbAcmpSMListenerVars.doTerminate) {
							bRunning = FALSE;
						}
						else if (memcmp(pRcvdCmdResp->listener_entity_id, openavbAcmpSMGlobalVars.my_id, sizeof(openavbAcmpSMGlobalVars.my_id)) == 0) {
							if (openavbAcmpSMListenerVars.rcvdConnectRXCmd) {
								state = OPENAVB_ACMP_SM_LISTENER_STATE_CONNECT_RX_COMMAND;
							}
							else if (openavbAcmpSMListenerVars.rcvdConnectTXResp) {
								state = OPENAVB_ACMP_SM_LISTENER_STATE_CONNECT_TX_RESPONSE;
							}
							else if (openavbAcmpSMListenerVars.rcvdGetRXState) {
								state = OPENAVB_ACMP_SM_LISTENER_STATE_GET_STATE;
							}
							else if (openavbAcmpSMListenerVars.rcvdDisconnectRXCmd) {
								state = OPENAVB_ACMP_SM_LISTENER_STATE_DISCONNECT_RX_COMMAND;
							}
							else if (openavbAcmpSMListenerVars.rcvdDisconnectTXResp) {
								state = OPENAVB_ACMP_SM_LISTENER_STATE_DISCONNECT_TX_RESPONSE;
							}
						}
					}
				}
				break;

			case OPENAVB_ACMP_SM_LISTENER_STATE_CONNECT_RX_COMMAND:
				{
					AVB_TRACE_LINE(AVB_TRACE_ACMP);
					AVB_LOG_DEBUG("State:  OPENAVB_ACMP_SM_LISTENER_STATE_CONNECT_RX_COMMAND");

					if (openavbAcmpSMListener_validListenerUnique(pRcvdCmdResp->listener_unique_id)) {
						if (!openavbAcmpSMListener_listenerIsConnected(pRcvdCmdResp)) {
							openavbAcmpSMListener_txCommand(OPENAVB_ACMP_MESSAGE_TYPE_CONNECT_TX_COMMAND, pRcvdCmdResp, FALSE);
						}
						else {
							openavbAcmpSMListener_txResponse(OPENAVB_ACMP_MESSAGE_TYPE_CONNECT_TX_RESPONSE, pRcvdCmdResp, OPENAVB_ACMP_STATUS_LISTENER_EXCLUSIVE);
						}
					}
					else {
						openavbAcmpSMListener_txResponse(OPENAVB_ACMP_MESSAGE_TYPE_CONNECT_TX_RESPONSE, pRcvdCmdResp, OPENAVB_ACMP_STATUS_LISTENER_UNKNOWN_ID);
					}
					state = OPENAVB_ACMP_SM_LISTENER_STATE_WAITING;
				}
				break;
			case OPENAVB_ACMP_SM_LISTENER_STATE_CONNECT_TX_RESPONSE:
				{
					AVB_TRACE_LINE(AVB_TRACE_ACMP);
					AVB_LOG_DEBUG("State:  OPENAVB_ACMP_SM_LISTENER_STATE_CONNECT_TX_RESPONSE");

					U8 status;
					if (openavbAcmpSMListener_validListenerUnique(pRcvdCmdResp->listener_unique_id)) {
						openavb_acmp_ACMPCommandResponse_t response;
						memcpy(&response, pRcvdCmdResp, sizeof(response));
						if (pRcvdCmdResp->status == OPENAVB_ACMP_STATUS_SUCCESS) {
							status = openavbAcmpSMListener_connectListener(&response);
						}
						else {
							status = pRcvdCmdResp->status;
						}

						// Save the state for this connection, so it can potentially be fast connected later.
						// TODO:  Add fast connect support for STREAMING_WAIT connections by handling START_STREAMING and STOP_STREAMING commands.
						if (status == OPENAVB_ACMP_STATUS_SUCCESS) {
							openavb_aem_descriptor_stream_io_t *pDescriptorStreamInput = openavbAemGetDescriptor(openavbAemGetConfigIdx(), OPENAVB_AEM_DESCRIPTOR_STREAM_INPUT, pRcvdCmdResp->listener_unique_id);
							if (pDescriptorStreamInput != NULL && pDescriptorStreamInput->stream != NULL) {
								if (gAvdeccCfg.bFastConnectSupported &&
										(pRcvdCmdResp->flags & OPENAVB_ACMP_FLAG_STREAMING_WAIT) == 0) {
									if (openavbAvdeccSaveState(
											pDescriptorStreamInput->stream,
											(pRcvdCmdResp->flags & (OPENAVB_ACMP_FLAG_CLASS_B | OPENAVB_ACMP_FLAG_SUPPORTS_ENCRYPTED | OPENAVB_ACMP_FLAG_ENCRYPTED_PDU)),
											pRcvdCmdResp->talker_unique_id,
											pRcvdCmdResp->talker_entity_id,
											pRcvdCmdResp->controller_entity_id)) {
										// Let the Controller know that the state is saved.
										response.flags |= OPENAVB_ACMP_FLAG_SAVED_STATE;
									}
									if (pDescriptorStreamInput->fast_connect_status >= OPENAVB_FAST_CONNECT_STATUS_IN_PROGRESS) {
										pDescriptorStreamInput->fast_connect_status = OPENAVB_FAST_CONNECT_STATUS_SUCCEEDED;
									}
								}

								// Save the response flags for reference later.
								pDescriptorStreamInput->acmp_flags = response.flags;
							}
						}

						openavb_list_node_t node = openavbAcmpSMListener_findInflightNodeFromCommand(pRcvdCmdResp);
						if (node) {
							openavb_acmp_InflightCommand_t *pInFlightCommand = openavbListData(node);
							if (pInFlightCommand) {
								response.sequence_id = pInFlightCommand->original_sequence_id;
							}
						}
						openavbAcmpSMListener_cancelTimeout(pRcvdCmdResp);
						openavbAcmpSMListener_removeInflight(pRcvdCmdResp);
						openavbAcmpSMListener_txResponse(OPENAVB_ACMP_MESSAGE_TYPE_CONNECT_RX_RESPONSE, &response, status);
					}
					state = OPENAVB_ACMP_SM_LISTENER_STATE_WAITING;
				}
				break;
			case OPENAVB_ACMP_SM_LISTENER_STATE_GET_STATE:
				{
					AVB_TRACE_LINE(AVB_TRACE_ACMP);
					AVB_LOG_DEBUG("State:  OPENAVB_ACMP_SM_LISTENER_STATE_GET_STATE");

					U8 error;

					openavb_acmp_ACMPCommandResponse_t response;
					memcpy(&response, pRcvdCmdResp, sizeof(response));
					if (openavbAcmpSMListener_validListenerUnique(pRcvdCmdResp->listener_unique_id)) {
						error = openavbAcmpSMListener_getState(&response);
					}
					else {
						error = OPENAVB_ACMP_STATUS_LISTENER_UNKNOWN_ID;
					}
					openavbAcmpSMListener_txResponse(OPENAVB_ACMP_MESSAGE_TYPE_GET_RX_STATE_RESPONSE, &response, error);
					state = OPENAVB_ACMP_SM_LISTENER_STATE_WAITING;
				}
				break;
			case OPENAVB_ACMP_SM_LISTENER_STATE_DISCONNECT_RX_COMMAND:
				{
					AVB_TRACE_LINE(AVB_TRACE_ACMP);
					AVB_LOG_DEBUG("State:  OPENAVB_ACMP_SM_LISTENER_STATE_DISCONNECT_RX_COMMAND");

					if (openavbAcmpSMListener_validListenerUnique(pRcvdCmdResp->listener_unique_id)) {
						U8 status;

						openavb_acmp_ACMPCommandResponse_t response;
						memcpy(&response, pRcvdCmdResp, sizeof(response));
						status = openavbAcmpSMListener_disconnectListener(pRcvdCmdResp);
						if (status == OPENAVB_ACMP_STATUS_SUCCESS) {
							openavbAcmpSMListener_txCommand(OPENAVB_ACMP_MESSAGE_TYPE_DISCONNECT_TX_COMMAND, pRcvdCmdResp, FALSE);
						}
						else {
							openavbAcmpSMListener_txResponse(OPENAVB_ACMP_MESSAGE_TYPE_DISCONNECT_RX_RESPONSE, &response, status);
						}

						// Clear the saved state for this connection, so it won't be fast connected later.
						if (gAvdeccCfg.bFastConnectSupported) {
							U16 configIdx = openavbAemGetConfigIdx();
							openavb_aem_descriptor_stream_io_t *pDescriptorStreamInput = openavbAemGetDescriptor(configIdx, OPENAVB_AEM_DESCRIPTOR_STREAM_INPUT, pRcvdCmdResp->listener_unique_id);
							if (pDescriptorStreamInput != NULL && pDescriptorStreamInput->stream != NULL) {
								pDescriptorStreamInput->fast_connect_status = OPENAVB_FAST_CONNECT_STATUS_NOT_AVAILABLE;
								openavbAvdeccClearSavedState(pDescriptorStreamInput->stream);
							}
						}
					}
					else {
						openavbAcmpSMListener_txResponse(OPENAVB_ACMP_MESSAGE_TYPE_DISCONNECT_RX_RESPONSE, pRcvdCmdResp, OPENAVB_ACMP_STATUS_NOT_CONNECTED);
					}
					state = OPENAVB_ACMP_SM_LISTENER_STATE_WAITING;
				}
				break;
			case OPENAVB_ACMP_SM_LISTENER_STATE_DISCONNECT_TX_RESPONSE:
				{
					AVB_TRACE_LINE(AVB_TRACE_ACMP);
					AVB_LOG_DEBUG("State:  OPENAVB_ACMP_SM_LISTENER_STATE_DISCONNECT_TX_RESPONSE");

					if (openavbAcmpSMListener_validListenerUnique(pRcvdCmdResp->listener_unique_id)) {
						openavb_acmp_ACMPCommandResponse_t response;
						memcpy(&response, pRcvdCmdResp, sizeof(response));
						U8 status = pRcvdCmdResp->status;

						openavb_list_node_t node = openavbAcmpSMListener_findInflightNodeFromCommand(pRcvdCmdResp);
						if (node) {
							openavb_acmp_InflightCommand_t *pInFlightCommand = openavbListData(node);
							if (pInFlightCommand) {
								response.sequence_id = pInFlightCommand->original_sequence_id;
							}
						}
						openavbAcmpSMListener_cancelTimeout(pRcvdCmdResp);
						openavbAcmpSMListener_removeInflight(pRcvdCmdResp);
						openavbAcmpSMListener_txResponse(OPENAVB_ACMP_MESSAGE_TYPE_DISCONNECT_RX_RESPONSE, &response, status);

						state = OPENAVB_ACMP_SM_LISTENER_STATE_WAITING;
					}
				}
				break;
			case OPENAVB_ACMP_SM_LISTENER_STATE_CONNECT_TX_TIMEOUT:
				{
					AVB_TRACE_LINE(AVB_TRACE_ACMP);
					AVB_LOG_DEBUG("State:  OPENAVB_ACMP_SM_LISTENER_STATE_CONNECT_TX_TIMEOUT");

					if (pInflightActive) {
						if (pInflightActive->retried) {
							if ((pInflightActive->command.flags & OPENAVB_ACMP_FLAG_FAST_CONNECT) != 0) {
								// Special handling for Fast Connect CONNECT_TX_COMMAND failures.
								AVB_LOG_DEBUG("Fast Connect timeout handling");
								openavb_aem_descriptor_stream_io_t *pDescriptorStreamInput = openavbAemGetDescriptor(openavbAemGetConfigIdx(), OPENAVB_AEM_DESCRIPTOR_STREAM_INPUT, pInflightActive->command.listener_unique_id);
								if (pDescriptorStreamInput != NULL &&
										pDescriptorStreamInput->fast_connect_status == OPENAVB_FAST_CONNECT_STATUS_IN_PROGRESS) {
									pDescriptorStreamInput->fast_connect_status = OPENAVB_FAST_CONNECT_STATUS_TIMED_OUT;
								}
#if 0
								// Wait another CONNECT_TX_COMMAND timeout period and then try again.
								// This option is described at the end of the second paragraph of IEEE 1722.1-2013 Clause 8.2.2.1.1.
								//
								// This feature is currently disabled, as it's not clear all the ramifications
								// of having an inflight attempt at the same time we might be initiating another
								// fast connect as a result of the ADP discovery of the Talker,
								// or of using the state machine to allow retries indefinitely.
								//
								pInflightActive->retried = FALSE;
								openavbTimeTimespecAddUsec(&pInflightActive->timer, OPENAVB_ACMP_COMMAND_TIMEOUT_CONNECT_TX_COMMAND * MICROSECONDS_PER_MSEC);
#else
								// Abort this attempt without sending a message the Controller.
								openavbAcmpSMListener_removeInflight(&pInflightActive->command);
#endif
							}
							else {
								// Standard handling.  Notify the AVDECC controller.
								openavb_acmp_ACMPCommandResponse_t response;
								memcpy(&response, &pInflightActive->command, sizeof(response));
								response.sequence_id = pInflightActive->original_sequence_id;
								openavbAcmpSMListener_txResponse(OPENAVB_ACMP_MESSAGE_TYPE_CONNECT_RX_RESPONSE, &response, OPENAVB_ACMP_STATUS_LISTENER_TALKER_TIMEOUT);
								openavbAcmpSMListener_removeInflight(&pInflightActive->command);
							}
						}
						else {
							openavbAcmpSMListener_txCommand(OPENAVB_ACMP_MESSAGE_TYPE_CONNECT_TX_COMMAND, &pInflightActive->command, TRUE);
						}
					}
					state = OPENAVB_ACMP_SM_LISTENER_STATE_WAITING;
				}
				break;
			case OPENAVB_ACMP_SM_LISTENER_STATE_DISCONNECT_TX_TIMEOUT:
				{
					AVB_TRACE_LINE(AVB_TRACE_ACMP);
					AVB_LOG_DEBUG("State:  OPENAVB_ACMP_SM_LISTENER_STATE_DISCONNECT_TX_TIMEOUT");

					if (pInflightActive) {
						if (pInflightActive->retried) {
							openavb_acmp_ACMPCommandResponse_t response;
							memcpy(&response, &pInflightActive->command, sizeof(response));
							response.sequence_id = pInflightActive->original_sequence_id;
							openavbAcmpSMListener_txResponse(OPENAVB_ACMP_MESSAGE_TYPE_DISCONNECT_RX_RESPONSE, &response, OPENAVB_ACMP_STATUS_LISTENER_TALKER_TIMEOUT);
							openavbAcmpSMListener_removeInflight(&pInflightActive->command);
						}
						else {
							openavbAcmpSMListener_txCommand(OPENAVB_ACMP_MESSAGE_TYPE_DISCONNECT_TX_COMMAND, &pInflightActive->command, TRUE);
						}
					}
					state = OPENAVB_ACMP_SM_LISTENER_STATE_WAITING;
				}
				break;
		}
	}
	ACMP_SM_UNLOCK();

	AVB_TRACE_EXIT(AVB_TRACE_ACMP);
}

void* openavbAcmpSmListenerThreadFn(void *pv)
{
	AVB_TRACE_ENTRY(AVB_TRACE_ACMP);
	openavbAcmpSMListenerStateMachine();
	AVB_TRACE_EXIT(AVB_TRACE_ACMP);
	return NULL;
}

bool openavbAcmpSMListenerStart()
{
	AVB_TRACE_ENTRY(AVB_TRACE_ACMP);

	openavbAcmpSMListenerVars.inflight = openavbListNewList();
	if (!openavbAcmpSMListenerVars.inflight) {
		AVB_LOG_ERROR("Unable to create inflight list. ACMP protocol not started.");
		AVB_TRACE_EXIT(AVB_TRACE_ACMP);
		return FALSE;
	}
	openavbAcmpSMListenerVars.listenerStreamInfos = openavbArrayNewArray(sizeof(openavb_acmp_ListenerStreamInfo_t));
	if (!openavbAcmpSMListenerVars.listenerStreamInfos) {
		AVB_LOG_ERROR("Unable to create listenerStreamInfos array. ACMP protocol not started.");
		AVB_TRACE_EXIT(AVB_TRACE_ACMP);
		return FALSE;
	}
	openavb_array_t streamInputDescriptorArray = openavbAemGetDescriptorArray(openavbAemGetConfigIdx(), OPENAVB_AEM_DESCRIPTOR_STREAM_INPUT);
	if (streamInputDescriptorArray) {
		openavbArrayMultiNew(openavbAcmpSMListenerVars.listenerStreamInfos, openavbArrayCount(streamInputDescriptorArray));
	}

	MUTEX_ATTR_HANDLE(mta);
	MUTEX_ATTR_INIT(mta);
	MUTEX_ATTR_SET_TYPE(mta, MUTEX_ATTR_TYPE_DEFAULT);
	MUTEX_ATTR_SET_NAME(mta, "openavbAcmpSMListenerMutex");
	MUTEX_CREATE_ERR();
	MUTEX_CREATE(openavbAcmpSMListenerMutex, mta);
	MUTEX_LOG_ERR("Could not create/initialize 'openavbAcmpSMListenerMutex' mutex");

	SEM_ERR_T(err);
	SEM_INIT(openavbAcmpSMListenerSemaphore, 1, err);
	SEM_LOG_ERR(err);

	// Start the State Machine
	bool errResult;
	bRunning = TRUE;
	THREAD_CREATE(openavbAcmpSmListenerThread, openavbAcmpSmListenerThread, NULL, openavbAcmpSmListenerThreadFn, NULL);
	THREAD_CHECK_ERROR(openavbAcmpSmListenerThread, "Thread / task creation failed", errResult);
	if (errResult) {
		bRunning = FALSE;
		AVB_TRACE_EXIT(AVB_TRACE_ACMP);
		return FALSE;
	}

	AVB_TRACE_EXIT(AVB_TRACE_ACMP);
	return TRUE;
}

void openavbAcmpSMListenerStop()
{
	AVB_TRACE_ENTRY(AVB_TRACE_ACMP);

	if (bRunning) {
		openavbAcmpSMListenerSet_doTerminate(TRUE);

		THREAD_JOIN(openavbAcmpSmListenerThread, NULL);
	}

	SEM_ERR_T(err);
	SEM_DESTROY(openavbAcmpSMListenerSemaphore, err);
	SEM_LOG_ERR(err);

	openavbListDeleteList(openavbAcmpSMListenerVars.inflight);
	openavbArrayDeleteArray(openavbAcmpSMListenerVars.listenerStreamInfos);

	AVB_TRACE_EXIT(AVB_TRACE_ACMP);
}

void openavbAcmpSMListenerSet_rcvdConnectRXCmd(openavb_acmp_ACMPCommandResponse_t *command)
{
	AVB_TRACE_ENTRY(AVB_TRACE_ACMP);
	ACMP_SM_LOCK();

	memcpy(pRcvdCmdResp, command, sizeof(*command));
	openavbAcmpSMListenerVars.rcvdConnectRXCmd = TRUE;

	SEM_ERR_T(err);
	SEM_POST(openavbAcmpSMListenerSemaphore, err);
	SEM_LOG_ERR(err);

	ACMP_SM_UNLOCK();
	AVB_TRACE_EXIT(AVB_TRACE_ACMP);
}

void openavbAcmpSMListenerSet_rcvdDisconnectRXCmd(openavb_acmp_ACMPCommandResponse_t *command)
{
	AVB_TRACE_ENTRY(AVB_TRACE_ACMP);
	ACMP_SM_LOCK();

	memcpy(pRcvdCmdResp, command, sizeof(*command));
	openavbAcmpSMListenerVars.rcvdDisconnectRXCmd = TRUE;

	SEM_ERR_T(err);
	SEM_POST(openavbAcmpSMListenerSemaphore, err);
	SEM_LOG_ERR(err);

	ACMP_SM_UNLOCK();
	AVB_TRACE_EXIT(AVB_TRACE_ACMP);
}

void openavbAcmpSMListenerSet_rcvdConnectTXResp(openavb_acmp_ACMPCommandResponse_t *command)
{
	AVB_TRACE_ENTRY(AVB_TRACE_ACMP);
	ACMP_SM_LOCK();

	memcpy(pRcvdCmdResp, command, sizeof(*command));
	openavbAcmpSMListenerVars.rcvdConnectTXResp = TRUE;

	SEM_ERR_T(err);
	SEM_POST(openavbAcmpSMListenerSemaphore, err);
	SEM_LOG_ERR(err);

	ACMP_SM_UNLOCK();
	AVB_TRACE_EXIT(AVB_TRACE_ACMP);
}

void openavbAcmpSMListenerSet_rcvdDisconnectTXResp(openavb_acmp_ACMPCommandResponse_t *command)
{
	AVB_TRACE_ENTRY(AVB_TRACE_ACMP);
	ACMP_SM_LOCK();

	memcpy(pRcvdCmdResp, command, sizeof(*command));
	openavbAcmpSMListenerVars.rcvdDisconnectTXResp = TRUE;

	SEM_ERR_T(err);
	SEM_POST(openavbAcmpSMListenerSemaphore, err);
	SEM_LOG_ERR(err);

	ACMP_SM_UNLOCK();
	AVB_TRACE_EXIT(AVB_TRACE_ACMP);
}

void openavbAcmpSMListenerSet_rcvdGetRXState(openavb_acmp_ACMPCommandResponse_t *command)
{
	AVB_TRACE_ENTRY(AVB_TRACE_ACMP);
	ACMP_SM_LOCK();

	memcpy(pRcvdCmdResp, command, sizeof(*command));
	openavbAcmpSMListenerVars.rcvdGetRXState = TRUE;

	SEM_ERR_T(err);
	SEM_POST(openavbAcmpSMListenerSemaphore, err);
	SEM_LOG_ERR(err);

	ACMP_SM_UNLOCK();
	AVB_TRACE_EXIT(AVB_TRACE_ACMP);
}

void openavbAcmpSMListenerSet_doTerminate(bool value)
{
	AVB_TRACE_ENTRY(AVB_TRACE_ACMP);
	openavbAcmpSMListenerVars.doTerminate = value;
	SEM_ERR_T(err);
	SEM_POST(openavbAcmpSMListenerSemaphore, err);
	SEM_LOG_ERR(err);

	AVB_TRACE_EXIT(AVB_TRACE_ACMP);
}


// Special command to initiate the fast connect support.
void openavbAcmpSMListenerSet_doFastConnect(const openavb_tl_data_cfg_t *pListener, U16 flags, U16 talker_unique_id, const U8 talker_entity_id[8], const U8 controller_entity_id[8])
{
	openavb_acmp_ACMPCommandResponse_t command;
	static U16 s_sequence_id = 0;

	// Get the descriptor and listener_unique_id for the supplied listener.
	openavb_aem_descriptor_stream_io_t *pDescriptor;
	U16 listenerUniqueId;
	for (listenerUniqueId = 0; listenerUniqueId < 0xFFFF; ++listenerUniqueId) {
		pDescriptor = openavbAemGetDescriptor(openavbAemGetConfigIdx(), OPENAVB_AEM_DESCRIPTOR_STREAM_INPUT, listenerUniqueId);
		if (!pDescriptor) {
			// Out of listeners to try.  Assume something went wrong.
			AVB_LOG_ERROR("Unable to find listener_unique_id for fast connect");
			return;
		}
		if (pDescriptor->stream && strcmp(pDescriptor->stream->friendly_name, pListener->friendly_name) == 0) {
			// We found a match.
			break;
		}
	}

	// Should we attempt to fast connect?
	if (!gAvdeccCfg.bFastConnectSupported ||
			(pDescriptor->fast_connect_status != OPENAVB_FAST_CONNECT_STATUS_UNKNOWN &&
			 pDescriptor->fast_connect_status != OPENAVB_FAST_CONNECT_STATUS_TIMED_OUT)) {
		return;
	}

	// Update the descriptor.
	pDescriptor->fast_connect_status = OPENAVB_FAST_CONNECT_STATUS_IN_PROGRESS;
	memcpy(pDescriptor->fast_connect_talker_entity_id, talker_entity_id, 8);
	CLOCK_GETTIME(OPENAVB_CLOCK_REALTIME, &pDescriptor->fast_connect_start_time);

	// Create a fake CONNECT_RX_COMMAND to kick off the fast connect process.
	// The FAST_CONNECT flag is used to indicate internally that the controller didn't initiate this.
	//
	// TODO:  IEEE 1722.1-2013 Clause 8.2.1.18 implies that stream_vlan_id should always be 0 for CONNECT_RX_COMMAND,
	//  as it is the Talker that may set a non-zero value in CONNECT_TX_RESPONSE.
	//  Is that really the case?
	//
	memset(&command, 0, sizeof(command));
	command.message_type = OPENAVB_ACMP_MESSAGE_TYPE_CONNECT_RX_COMMAND;
	memset(command.stream_id, 0xFF, 8);
	memcpy(command.controller_entity_id, controller_entity_id, 8);
	memcpy(command.talker_entity_id, talker_entity_id, 8);
	memcpy(command.listener_entity_id, openavbAcmpSMGlobalVars.my_id, 8);
	command.talker_unique_id = talker_unique_id;
	command.listener_unique_id = listenerUniqueId;
	memset(command.stream_dest_mac, 0xFF, 6);
	command.sequence_id = ++s_sequence_id;
	command.flags = flags | OPENAVB_ACMP_FLAG_FAST_CONNECT | OPENAVB_ACMP_FLAG_SAVED_STATE;

	AVB_LOGF_INFO("Listener %s attempting fast connect to flags=0x%04x, talker_unique_id=0x%04x, talker_entity_id=" ENTITYID_FORMAT ", controller_entity_id=" ENTITYID_FORMAT,
			pListener->friendly_name,
			flags,
			talker_unique_id,
			ENTITYID_ARGS(talker_entity_id),
			ENTITYID_ARGS(controller_entity_id));

	// Start processing the faked command.
	openavbAcmpSMListenerSet_rcvdConnectRXCmd(&command);
}

// Assist function to detect if Talker available for fast connect
void openavbAcmpSMListenerSet_talkerTestFastConnect(
	const U8 entity_id[8])
{
	//AVB_LOGF_DEBUG("Talker entity discovered:  " ENTITYID_FORMAT, ENTITYID_ARGS(entity_id));

	// Are there any Listeners that have been unsuccessful in a fast connect?
	openavb_aem_descriptor_stream_io_t *pDescriptor;
	U16 listenerUniqueId;
	for (listenerUniqueId = 0; listenerUniqueId < 0xFFFF; ++listenerUniqueId) {
		pDescriptor = openavbAemGetDescriptor(openavbAemGetConfigIdx(), OPENAVB_AEM_DESCRIPTOR_STREAM_INPUT, listenerUniqueId);
		if (!pDescriptor) {
			// Out of listeners to try.
			break;
		}

		if (pDescriptor->stream &&
				pDescriptor->fast_connect_status == OPENAVB_FAST_CONNECT_STATUS_TIMED_OUT &&
				memcmp(pDescriptor->fast_connect_talker_entity_id, entity_id, 8) == 0) {
			//
			// We found a Talker matching the one we have been looking for.
			//

			// See if it is time to connect yet.
			struct timespec currenttime;
			CLOCK_GETTIME(OPENAVB_CLOCK_REALTIME, &currenttime);
			if (openavbTimeTimespecCmp(&currenttime, &pDescriptor->fast_connect_start_time) < 0) {
				AVB_LOG_DEBUG("Not yet time to do a fast connect");
				break;
			}

			// Get the rest of the details we need to connect to it.
			U16 flags, talker_unique_id;
			U8 talker_entity_id[8], controller_entity_id[8];
			bool bAvailable = openavbAvdeccGetSaveStateInfo(pDescriptor->stream, &flags, &talker_unique_id, &talker_entity_id, &controller_entity_id);
			if (bAvailable && memcmp(entity_id, talker_entity_id, 8) == 0) {
				AVB_LOGF_DEBUG("Detected talker_entity_id=" ENTITYID_FORMAT ".  Retrying fast connect.", ENTITYID_ARGS(talker_entity_id));
				openavbAcmpSMListenerSet_doFastConnect(pDescriptor->stream, flags, talker_unique_id, talker_entity_id, controller_entity_id);
			}
			else {
				AVB_LOGF_DEBUG("Fast connect info for talker_entity_id=" ENTITYID_FORMAT " no longer valid", ENTITYID_ARGS(entity_id));
				memset(pDescriptor->fast_connect_talker_entity_id, 0, 8);
			}

			break;
		}
	}
}