1

DemoTasks/SimpleTCPEchoServer.c

@@ -0,0 +1,288 @@
+/*
+    FreeRTOS V202212.00
+    All rights reserved
+
+    VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
+
+    This file is part of the FreeRTOS distribution.
+
+    FreeRTOS is free software; you can redistribute it and/or modify it under
+    the terms of the GNU General Public License (version 2) as published by the
+    Free Software Foundation >>!AND MODIFIED BY!<< the FreeRTOS exception.
+
+    ***************************************************************************
+    >>!   NOTE: The modification to the GPL is included to allow you to     !<<
+    >>!   distribute a combined work that includes FreeRTOS without being   !<<
+    >>!   obliged to provide the source code for proprietary components     !<<
+    >>!   outside of the FreeRTOS kernel.                                   !<<
+    ***************************************************************************
+
+    FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
+    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+    FOR A PARTICULAR PURPOSE.  Full license text is available on the following
+    link: http://www.freertos.org/a00114.html
+
+    ***************************************************************************
+     *                                                                       *
+     *    FreeRTOS provides completely free yet professionally developed,    *
+     *    robust, strictly quality controlled, supported, and cross          *
+     *    platform software that is more than just the market leader, it     *
+     *    is the industry's de facto standard.                               *
+     *                                                                       *
+     *    Help yourself get started quickly while simultaneously helping     *
+     *    to support the FreeRTOS project by purchasing a FreeRTOS           *
+     *    tutorial book, reference manual, or both:                          *
+     *    http://www.FreeRTOS.org/Documentation                              *
+     *                                                                       *
+    ***************************************************************************
+
+    http://www.FreeRTOS.org/FAQHelp.html - Having a problem?  Start by reading
+    the FAQ page "My application does not run, what could be wrong?".  Have you
+    defined configASSERT()?
+
+    http://www.FreeRTOS.org/support - In return for receiving this top quality
+    embedded software for free we request you assist our global community by
+    participating in the support forum.
+
+    http://www.FreeRTOS.org/training - Investing in training allows your team to
+    be as productive as possible as early as possible.  Now you can receive
+    FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers
+    Ltd, and the world's leading authority on the world's leading RTOS.
+
+    http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
+    including FreeRTOS+Trace - an indispensable productivity tool, a DOS
+    compatible FAT file system, and our tiny thread aware UDP/IP stack.
+
+    http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.
+    Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.
+
+    http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High
+    Integrity Systems ltd. to sell under the OpenRTOS brand.  Low cost OpenRTOS
+    licenses offer ticketed support, indemnification and commercial middleware.
+
+    http://www.SafeRTOS.com - High Integrity Systems also provide a safety
+    engineered and independently SIL3 certified version for use in safety and
+    mission critical applications that require provable dependability.
+
+    1 tab == 4 spaces!
+*/
+
+/*
+ * FreeRTOS tasks are used with FreeRTOS+TCP to create a TCP echo server on the
+ * standard echo port number (7).
+ *
+ * See the following web page for essential demo usage and configuration
+ * details:
+ * https://www.FreeRTOS.org/FreeRTOS-Plus/FreeRTOS_Plus_TCP/TCP_Echo_Server.html
+ */
+
+/* Standard includes. */
+#include <stdint.h>
+#include <stdio.h>
+
+/* FreeRTOS includes. */
+#include "FreeRTOS.h"
+#include "task.h"
+#include "semphr.h"
+
+/* FreeRTOS+TCP includes. */
+#include "FreeRTOS_IP.h"
+#include "FreeRTOS_Sockets.h"
+
+/* Remove the whole file if FreeRTOSIPConfig.h is set to exclude TCP. */
+#if( ipconfigUSE_TCP == 1 )
+
+/* The maximum time to wait for a closing socket to close. */
+#define tcpechoSHUTDOWN_DELAY	( pdMS_TO_TICKS( 5000 ) )
+
+/* The standard echo port number. */
+#define tcpechoPORT_NUMBER		7
+
+/* If ipconfigUSE_TCP_WIN is 1 then the Tx sockets will use a buffer size set by
+ipconfigTCP_TX_BUFFER_LENGTH, and the Tx window size will be
+configECHO_SERVER_TX_WINDOW_SIZE times the buffer size.  Note
+ipconfigTCP_TX_BUFFER_LENGTH is set in FreeRTOSIPConfig.h as it is a standard TCP/IP
+stack constant, whereas configECHO_SERVER_TX_WINDOW_SIZE is set in
+FreeRTOSConfig.h as it is a demo application constant. */
+#ifndef configECHO_SERVER_TX_WINDOW_SIZE
+	#define configECHO_SERVER_TX_WINDOW_SIZE	2
+#endif
+
+/* If ipconfigUSE_TCP_WIN is 1 then the Rx sockets will use a buffer size set by
+ipconfigTCP_RX_BUFFER_LENGTH, and the Rx window size will be
+configECHO_SERVER_RX_WINDOW_SIZE times the buffer size.  Note
+ipconfigTCP_RX_BUFFER_LENGTH is set in FreeRTOSIPConfig.h as it is a standard TCP/IP
+stack constant, whereas configECHO_SERVER_RX_WINDOW_SIZE is set in
+FreeRTOSConfig.h as it is a demo application constant. */
+#ifndef configECHO_SERVER_RX_WINDOW_SIZE
+	#define configECHO_SERVER_RX_WINDOW_SIZE	2
+#endif
+
+/*-----------------------------------------------------------*/
+
+/*
+ * Uses FreeRTOS+TCP to listen for incoming echo connections, creating a task
+ * to handle each connection.
+ */
+static void prvConnectionListeningTask( void *pvParameters );
+
+/*
+ * Created by the connection listening task to handle a single connection.
+ */
+static void prvServerConnectionInstance( void *pvParameters );
+
+/*-----------------------------------------------------------*/
+
+/* Stores the stack size passed into vStartSimpleTCPServerTasks() so it can be
+reused when the server listening task creates tasks to handle connections. */
+static uint16_t usUsedStackSize = 0;
+
+/*-----------------------------------------------------------*/
+
+void vStartSimpleTCPServerTasks( uint16_t usStackSize, UBaseType_t uxPriority )
+{
+	/* Create the TCP echo server. */
+	xTaskCreate( prvConnectionListeningTask, "ServerListener", usStackSize, NULL, uxPriority + 1, NULL );
+
+	/* Remember the requested stack size so it can be re-used by the server
+	listening task when it creates tasks to handle connections. */
+	usUsedStackSize = usStackSize;
+}
+/*-----------------------------------------------------------*/
+
+static void prvConnectionListeningTask( void *pvParameters )
+{
+struct freertos_sockaddr xClient, xBindAddress;
+Socket_t xListeningSocket, xConnectedSocket;
+socklen_t xSize = sizeof( xClient );
+static const TickType_t xReceiveTimeOut = portMAX_DELAY;
+const BaseType_t xBacklog = 20;
+
+#if( ipconfigUSE_TCP_WIN == 1 )
+	WinProperties_t xWinProps;
+
+	/* Fill in the buffer and window sizes that will be used by the socket. */
+	xWinProps.lTxBufSize = ipconfigTCP_TX_BUFFER_LENGTH;
+	xWinProps.lTxWinSize = configECHO_SERVER_TX_WINDOW_SIZE;
+	xWinProps.lRxBufSize = ipconfigTCP_RX_BUFFER_LENGTH;
+	xWinProps.lRxWinSize = configECHO_SERVER_RX_WINDOW_SIZE;
+#endif /* ipconfigUSE_TCP_WIN */
+
+	/* Just to prevent compiler warnings. */
+	( void ) pvParameters;
+
+	/* Attempt to open the socket. */
+	xListeningSocket = FreeRTOS_socket( FREERTOS_AF_INET, FREERTOS_SOCK_STREAM, FREERTOS_IPPROTO_TCP );
+	configASSERT( xListeningSocket != FREERTOS_INVALID_SOCKET );
+
+	/* Set a time out so accept() will just wait for a connection. */
+	FreeRTOS_setsockopt( xListeningSocket, 0, FREERTOS_SO_RCVTIMEO, &xReceiveTimeOut, sizeof( xReceiveTimeOut ) );
+
+	/* Set the window and buffer sizes. */
+	#if( ipconfigUSE_TCP_WIN == 1 )
+	{
+		FreeRTOS_setsockopt( xListeningSocket, 0, FREERTOS_SO_WIN_PROPERTIES, ( void * ) &xWinProps, sizeof( xWinProps ) );
+	}
+	#endif /* ipconfigUSE_TCP_WIN */
+
+	/* Bind the socket to the port that the client task will send to, then
+	listen for incoming connections. */
+	xBindAddress.sin_port = tcpechoPORT_NUMBER;
+	xBindAddress.sin_port = FreeRTOS_htons( xBindAddress.sin_port );
+	FreeRTOS_bind( xListeningSocket, &xBindAddress, sizeof( xBindAddress ) );
+	FreeRTOS_listen( xListeningSocket, xBacklog );
+
+	for( ;; )
+	{
+		/* Wait for a client to connect. */
+		xConnectedSocket = FreeRTOS_accept( xListeningSocket, &xClient, &xSize );
+		configASSERT( xConnectedSocket != FREERTOS_INVALID_SOCKET );
+
+		/* Spawn a task to handle the connection. */
+		xTaskCreate( prvServerConnectionInstance, "EchoServer", usUsedStackSize, ( void * ) xConnectedSocket, tskIDLE_PRIORITY, NULL );
+	}
+}
+/*-----------------------------------------------------------*/
+
+static void prvServerConnectionInstance( void *pvParameters )
+{
+int32_t lBytes, lSent, lTotalSent;
+Socket_t xConnectedSocket;
+static const TickType_t xReceiveTimeOut = pdMS_TO_TICKS( 5000 );
+static const TickType_t xSendTimeOut = pdMS_TO_TICKS( 5000 );
+TickType_t xTimeOnShutdown;
+uint8_t *pucRxBuffer;
+
+	xConnectedSocket = ( Socket_t ) pvParameters;
+
+	/* Attempt to create the buffer used to receive the string to be echoed
+	back.  This could be avoided using a zero copy interface that just returned
+	the same buffer. */
+	pucRxBuffer = ( uint8_t * ) pvPortMalloc( ipconfigTCP_MSS );
+
+	if( pucRxBuffer != NULL )
+	{
+		FreeRTOS_setsockopt( xConnectedSocket, 0, FREERTOS_SO_RCVTIMEO, &xReceiveTimeOut, sizeof( xReceiveTimeOut ) );
+		FreeRTOS_setsockopt( xConnectedSocket, 0, FREERTOS_SO_SNDTIMEO, &xSendTimeOut, sizeof( xReceiveTimeOut ) );
+
+		for( ;; )
+		{
+			/* Zero out the receive array so there is NULL at the end of the string
+			when it is printed out. */
+			memset( pucRxBuffer, 0x00, ipconfigTCP_MSS );
+
+			/* Receive data on the socket. */
+			lBytes = FreeRTOS_recv( xConnectedSocket, pucRxBuffer, ipconfigTCP_MSS, 0 );
+
+			/* If data was received, echo it back. */
+			if( lBytes >= 0 )
+			{
+				lSent = 0;
+				lTotalSent = 0;
+
+				/* Call send() until all the data has been sent. */
+				while( ( lSent >= 0 ) && ( lTotalSent < lBytes ) )
+				{
+					lSent = FreeRTOS_send( xConnectedSocket, pucRxBuffer, lBytes - lTotalSent, 0 );
+					lTotalSent += lSent;
+				}
+
+				if( lSent < 0 )
+				{
+					/* Socket closed? */
+					break;
+				}
+			}
+			else
+			{
+				/* Socket closed? */
+				break;
+			}
+		}
+	}
+
+	/* Initiate a shutdown in case it has not already been initiated. */
+	FreeRTOS_shutdown( xConnectedSocket, FREERTOS_SHUT_RDWR );
+
+	/* Wait for the shutdown to take effect, indicated by FreeRTOS_recv()
+	returning an error. */
+	xTimeOnShutdown = xTaskGetTickCount();
+	do
+	{
+		if( FreeRTOS_recv( xConnectedSocket, pucRxBuffer, ipconfigTCP_MSS, 0 ) < 0 )
+		{
+			break;
+		}
+	} while( ( xTaskGetTickCount() - xTimeOnShutdown ) < tcpechoSHUTDOWN_DELAY );
+
+	/* Finished with the socket, buffer, the task. */
+	vPortFree( pucRxBuffer );
+	FreeRTOS_closesocket( xConnectedSocket );
+
+	vTaskDelete( NULL );
+}
+/*-----------------------------------------------------------*/
+
+/* The whole file is excluded if TCP is not compiled in. */
+#endif /* ipconfigUSE_TCP */
+

DemoTasks/SimpleUDPClientAndServer.c

@@ -0,0 +1,354 @@
+/*
+ * FreeRTOS V202212.00
+ * Copyright (C) 2017 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * https://www.FreeRTOS.org
+ * https://aws.amazon.com/freertos
+ *
+ */
+
+/*
+ * Creates two transmitting tasks and two receiving tasks.  The transmitting
+ * tasks send values that are received by the receiving tasks.  One set of tasks
+ * uses the standard API.  The other set of tasks uses the zero copy API.
+ *
+ * See the following web page for essential demo usage and configuration
+ * details:
+ * https://www.FreeRTOS.org/FreeRTOS-Plus/FreeRTOS_Plus_TCP/examples_FreeRTOS_simulator.html
+ */
+
+/* Standard includes. */
+#include <stdint.h>
+#include <stdio.h>
+
+/* FreeRTOS includes. */
+#include "FreeRTOS.h"
+#include "task.h"
+
+/* FreeRTOS+TCP includes. */
+#include "FreeRTOS_IP.h"
+#include "FreeRTOS_Sockets.h"
+
+#define simpTINY_DELAY	( ( TickType_t ) 2 )
+
+/*
+ * Uses a socket to send data without using the zero copy option.
+ * prvSimpleServerTask() will receive the data.
+ */
+static void prvSimpleClientTask( void *pvParameters );
+
+/*
+ * Uses a socket to receive the data sent by the prvSimpleClientTask() task.
+ * Does not use the zero copy option.
+ */
+static void prvSimpleServerTask( void *pvParameters );
+
+/*
+ * Uses a socket to send data using the zero copy option.
+ * prvSimpleZeroCopyServerTask() will receive the data.
+ */
+static void prvSimpleZeroCopyUDPClientTask( void *pvParameters );
+
+/*
+ * Uses a socket to receive the data sent by the prvSimpleZeroCopyUDPClientTask()
+ * task.  Uses the zero copy option.
+ */
+static void prvSimpleZeroCopyServerTask( void *pvParameters );
+
+/*-----------------------------------------------------------*/
+
+void vStartSimpleUDPClientServerTasks( uint16_t usStackSize, uint32_t ulPort, UBaseType_t uxPriority )
+{
+	/* Create the client and server tasks that do not use the zero copy
+	interface. */
+	xTaskCreate( prvSimpleClientTask, "SimpCpyClnt", usStackSize, ( void * ) ulPort, uxPriority, NULL );
+	xTaskCreate( prvSimpleServerTask, "SimpCpySrv", usStackSize, ( void * ) ulPort, uxPriority + 1, NULL );
+
+	/* Create the client and server tasks that do use the zero copy interface. */
+	xTaskCreate( prvSimpleZeroCopyUDPClientTask, "SimpZCpyClnt", usStackSize, ( void * ) ( ulPort + 1 ), uxPriority, NULL );
+	xTaskCreate( prvSimpleZeroCopyServerTask, "SimpZCpySrv", usStackSize, ( void * ) ( ulPort + 1 ), uxPriority + 1, NULL );
+}
+/*-----------------------------------------------------------*/
+
+static void prvSimpleClientTask( void *pvParameters )
+{
+Socket_t xClientSocket;
+struct freertos_sockaddr xDestinationAddress;
+uint8_t cString[ 65 ];
+BaseType_t lReturned;
+uint32_t ulCount = 0UL, ulIPAddress;
+const uint32_t ulLoopsPerSocket = 10UL;
+const TickType_t x150ms = 150UL / portTICK_PERIOD_MS;
+
+	/* Remove compiler warning about unused parameters. */
+	( void ) pvParameters;
+
+	/* It is assumed that this task is not created until the network is up,
+	so the IP address can be obtained immediately.  store the IP address being
+	used in ulIPAddress.  This is done so the socket can send to a different
+	port on the same IP address. */
+	FreeRTOS_GetAddressConfiguration( &ulIPAddress, NULL, NULL, NULL );
+
+	/* This test sends to itself, so data sent from here is received by a server
+	socket on the same IP address.  Setup the freertos_sockaddr structure with
+	this nodes IP address, and the port number being sent to.  The strange
+	casting is to try and remove compiler warnings on 32 bit machines. */
+	xDestinationAddress.sin_addr = ulIPAddress;
+	xDestinationAddress.sin_port = ( uint16_t ) ( ( uint32_t ) pvParameters ) & 0xffffUL;
+	xDestinationAddress.sin_port = FreeRTOS_htons( xDestinationAddress.sin_port );
+
+	for( ;; )
+	{
+		/* Create the socket. */
+		xClientSocket = FreeRTOS_socket( FREERTOS_AF_INET, FREERTOS_SOCK_DGRAM, FREERTOS_IPPROTO_UDP );
+		configASSERT( xClientSocket != FREERTOS_INVALID_SOCKET );
+
+		/* The count is used to differentiate between different messages sent to
+		the server, and to break out of the do while loop below. */
+		ulCount = 0UL;
+
+		do
+		{
+			/* Create the string that is sent to the server. */
+			printf( ( char * ) cString, "Server received (not zero copy): Message number %lu\r\n", ulCount );
+
+			/* Send the string to the socket.  ulFlags is set to 0, so the zero
+			copy option is not selected.  That means the data from cString[] is
+			copied into a network buffer inside FreeRTOS_sendto(), and cString[]
+			can be reused as soon as FreeRTOS_sendto() has returned. */
+			lReturned = FreeRTOS_sendto( xClientSocket, ( void * ) cString, strlen( ( const char * ) cString ), 0, &xDestinationAddress, sizeof( xDestinationAddress ) );
+
+			ulCount++;
+
+		} while( ( lReturned != FREERTOS_SOCKET_ERROR ) && ( ulCount < ulLoopsPerSocket ) );
+
+		FreeRTOS_closesocket( xClientSocket );
+
+		/* A short delay to prevent the messages printed by the server task
+		scrolling off the screen too quickly, and to prevent reduce the network
+		loading. */
+		vTaskDelay( x150ms );
+	}
+}
+/*-----------------------------------------------------------*/
+
+static void prvSimpleServerTask( void *pvParameters )
+{
+int32_t lBytes;
+uint8_t cReceivedString[ 60 ];
+struct freertos_sockaddr xClient, xBindAddress;
+uint32_t xClientLength = sizeof( xClient );
+Socket_t xListeningSocket;
+
+	/* Just to prevent compiler warnings. */
+	( void ) pvParameters;
+
+	/* Attempt to open the socket. */
+	xListeningSocket = FreeRTOS_socket( FREERTOS_AF_INET, FREERTOS_SOCK_DGRAM, FREERTOS_IPPROTO_UDP );
+	configASSERT( xListeningSocket != FREERTOS_INVALID_SOCKET );
+
+	/* This test receives data sent from a different port on the same IP
+	address.  Configure the freertos_sockaddr structure with the address being
+	bound to.  The strange casting is to try and remove	compiler warnings on 32
+	bit machines.  Note that this task is only created after the network is up,
+	so the IP address is valid here. */
+	xBindAddress.sin_port = ( uint16_t ) ( ( uint32_t ) pvParameters ) & 0xffffUL;
+	xBindAddress.sin_port = FreeRTOS_htons( xBindAddress.sin_port );
+
+	/* Bind the socket to the port that the client task will send to. */
+	FreeRTOS_bind( xListeningSocket, &xBindAddress, sizeof( xBindAddress ) );
+
+	for( ;; )
+	{
+		/* Zero out the receive array so there is NULL at the end of the string
+		when it is printed out. */
+		memset( cReceivedString, 0x00, sizeof( cReceivedString ) );
+
+		/* Receive data on the socket.  ulFlags is zero, so the zero copy option
+		is not set and the received data is copied into the buffer pointed to by
+		cReceivedString.  By default the block time is portMAX_DELAY.
+		xClientLength is not actually used by FreeRTOS_recvfrom(), but is set
+		appropriately in case future versions do use it. */
+		lBytes = FreeRTOS_recvfrom( xListeningSocket, cReceivedString, sizeof( cReceivedString ), 0, &xClient, &xClientLength );
+
+		/* Error check. */
+		configASSERT( lBytes == ( BaseType_t ) strlen( ( const char * ) cReceivedString ) );
+	}
+}
+/*-----------------------------------------------------------*/
+
+static void prvSimpleZeroCopyUDPClientTask( void *pvParameters )
+{
+Socket_t xClientSocket;
+uint8_t *pucUDPPayloadBuffer;
+struct freertos_sockaddr xDestinationAddress;
+BaseType_t lReturned;
+uint32_t ulCount = 0UL, ulIPAddress;
+const uint32_t ulLoopsPerSocket = 10UL;
+const char *pcStringToSend = "Server received (using zero copy): Message number ";
+const TickType_t x150ms = 150UL / portTICK_PERIOD_MS;
+/* 15 is added to ensure the number, \r\n and terminating zero fit. */
+const size_t xStringLength = strlen( pcStringToSend ) + 15;
+
+	/* Remove compiler warning about unused parameters. */
+	( void ) pvParameters;
+
+	/* It is assumed that this task is not created until the network is up,
+	so the IP address can be obtained immediately.  store the IP address being
+	used in ulIPAddress.  This is done so the socket can send to a different
+	port on the same IP address. */
+	FreeRTOS_GetAddressConfiguration( &ulIPAddress, NULL, NULL, NULL );
+
+	/* This test sends to itself, so data sent from here is received by a server
+	socket on the same IP address.  Setup the freertos_sockaddr structure with
+	this nodes IP address, and the port number being sent to.  The strange
+	casting is to try and remove compiler warnings on 32 bit machines. */
+	xDestinationAddress.sin_addr = ulIPAddress;
+	xDestinationAddress.sin_port = ( uint16_t ) ( ( uint32_t ) pvParameters ) & 0xffffUL;
+	xDestinationAddress.sin_port = FreeRTOS_htons( xDestinationAddress.sin_port );
+
+	for( ;; )
+	{
+		/* Create the socket. */
+		xClientSocket = FreeRTOS_socket( FREERTOS_AF_INET, FREERTOS_SOCK_DGRAM, FREERTOS_IPPROTO_UDP );
+		configASSERT( xClientSocket != FREERTOS_INVALID_SOCKET );
+
+		/* The count is used to differentiate between different messages sent to
+		the server, and to break out of the do while loop below. */
+		ulCount = 0UL;
+
+		do
+		{
+			/* This task is going to send using the zero copy interface.  The
+			data being sent is therefore written directly into a buffer that is
+			passed into, rather than copied into, the FreeRTOS_sendto()
+			function.
+
+			First obtain a buffer of adequate length from the IP stack into which
+			the string will be written.  Although a max delay is used, the actual
+			delay will be capped to ipconfigMAX_SEND_BLOCK_TIME_TICKS, hence
+			the do while loop is used to ensure a buffer is obtained. */
+			do
+			{
+			} while( ( pucUDPPayloadBuffer = ( uint8_t * ) FreeRTOS_GetUDPPayloadBuffer( xStringLength, portMAX_DELAY ) ) == NULL );
+
+			/* A buffer was successfully obtained.  Create the string that is
+			sent to the server.  First the string is filled with zeros as this will
+			effectively be the null terminator when the string is received at the other
+			end.  Note that the string is being written directly into the buffer
+			obtained from the IP stack above. */
+			memset( ( void * ) pucUDPPayloadBuffer, 0x00, xStringLength );
+			printf( ( char * ) pucUDPPayloadBuffer, "%s%lu\r\n", pcStringToSend, ulCount );
+
+			/* Pass the buffer into the send function.  ulFlags has the
+			FREERTOS_ZERO_COPY bit set so the IP stack will take control of the
+			buffer rather than copy data out of the buffer. */
+			lReturned = FreeRTOS_sendto( xClientSocket,  				/* The socket being sent to. */
+										( void * ) pucUDPPayloadBuffer, /* A pointer to the the data being sent. */
+										strlen( ( const char * ) pucUDPPayloadBuffer ) + 1, /* The length of the data being sent - including the string's null terminator. */
+										FREERTOS_ZERO_COPY, 			/* ulFlags with the FREERTOS_ZERO_COPY bit set. */
+										&xDestinationAddress, 			/* Where the data is being sent. */
+										sizeof( xDestinationAddress ) );
+
+			if( lReturned == 0 )
+			{
+				/* The send operation failed, so this task is still responsible
+				for the buffer obtained from the IP stack.  To ensure the buffer
+				is not lost it must either be used again, or, as in this case,
+				returned to the IP stack using FreeRTOS_ReleaseUDPPayloadBuffer().
+				pucUDPPayloadBuffer can be safely re-used after this call. */
+				FreeRTOS_ReleaseUDPPayloadBuffer( ( void * ) pucUDPPayloadBuffer );
+			}
+			else
+			{
+				/* The send was successful so the IP stack is now managing the
+				buffer pointed to by pucUDPPayloadBuffer, and the IP stack will
+				return the buffer once it has been sent.  pucUDPPayloadBuffer can
+				be safely re-used. */
+			}
+
+			ulCount++;
+
+		} while( ( lReturned != FREERTOS_SOCKET_ERROR ) && ( ulCount < ulLoopsPerSocket ) );
+
+		FreeRTOS_closesocket( xClientSocket );
+
+		/* A short delay to prevent the messages scrolling off the screen too
+		quickly. */
+		vTaskDelay( x150ms );
+	}
+}
+/*-----------------------------------------------------------*/
+
+static void prvSimpleZeroCopyServerTask( void *pvParameters )
+{
+int32_t lBytes;
+uint8_t *pucUDPPayloadBuffer;
+struct freertos_sockaddr xClient, xBindAddress;
+uint32_t xClientLength = sizeof( xClient ), ulIPAddress;
+Socket_t xListeningSocket;
+
+	/* Just to prevent compiler warnings. */
+	( void ) pvParameters;
+
+	/* Attempt to open the socket. */
+	xListeningSocket = FreeRTOS_socket( FREERTOS_AF_INET, FREERTOS_SOCK_DGRAM, FREERTOS_IPPROTO_UDP );
+	configASSERT( xListeningSocket != FREERTOS_INVALID_SOCKET );
+
+	/* This test receives data sent from a different port on the same IP address.
+	Obtain the nodes IP address.  Configure the freertos_sockaddr structure with
+	the address being bound to.  The strange casting is to try and remove
+	compiler warnings on 32 bit machines.  Note that this task is only created
+	after the network is up, so the IP address is valid here. */
+	FreeRTOS_GetAddressConfiguration( &ulIPAddress, NULL, NULL, NULL );
+	xBindAddress.sin_addr = ulIPAddress;
+	xBindAddress.sin_port = ( uint16_t ) ( ( uint32_t ) pvParameters ) & 0xffffUL;
+	xBindAddress.sin_port = FreeRTOS_htons( xBindAddress.sin_port );
+
+	/* Bind the socket to the port that the client task will send to. */
+	FreeRTOS_bind( xListeningSocket, &xBindAddress, sizeof( xBindAddress ) );
+
+	for( ;; )
+	{
+		/* Receive data on the socket.  ulFlags has the zero copy bit set
+		(FREERTOS_ZERO_COPY) indicating to the stack that a reference to the
+		received data should be passed out to this task using the second
+		parameter to the FreeRTOS_recvfrom() call.  When this is done the
+		IP stack is no longer responsible for releasing the buffer, and
+		the task *must* return the buffer to the stack when it is no longer
+		needed.  By default the block time is portMAX_DELAY. */
+		lBytes = FreeRTOS_recvfrom( xListeningSocket, ( void * ) &pucUDPPayloadBuffer, 0, FREERTOS_ZERO_COPY, &xClient, &xClientLength );
+
+		/* Print the received characters. */
+		if( lBytes > 0 )
+		{
+			/* It is expected to receive one more byte than the string length as
+			the NULL terminator is also transmitted. */
+			configASSERT( lBytes == ( ( BaseType_t ) strlen( ( const char * ) pucUDPPayloadBuffer ) + 1 ) );
+		}
+
+		if( lBytes >= 0 )
+		{
+			/* The buffer *must* be freed once it is no longer needed. */
+			FreeRTOS_ReleaseUDPPayloadBuffer( pucUDPPayloadBuffer );
+		}
+	}
+}
+

DemoTasks/TCPEchoClient_SingleTasks.c

@@ -0,0 +1,358 @@
+/*
+ * FreeRTOS V202212.00
+ * Copyright (C) 2020 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * https://www.FreeRTOS.org
+ * https://github.com/FreeRTOS
+ *
+ */
+
+/*
+ * A set of tasks are created that send TCP echo requests to the standard echo
+ * port (port 7) on the IP address set by the configECHO_SERVER_ADDR0 to
+ * configECHO_SERVER_ADDR3 constants, then wait for and verify the reply
+ * (another demo is available that demonstrates the reception being performed in
+ * a task other than that from with the request was made).
+ *
+ * See the following web page for essential demo usage and configuration
+ * details:
+ * https://www.FreeRTOS.org/FreeRTOS-Plus/FreeRTOS_Plus_TCP/examples_FreeRTOS_simulator.html
+ */
+
+/* Standard includes. */
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+/* FreeRTOS includes. */
+#include "FreeRTOS.h"
+#include "task.h"
+#include "queue.h"
+
+/* FreeRTOS+TCP includes. */
+#include "FreeRTOS_IP.h"
+#include "FreeRTOS_Sockets.h"
+
+#include "tcp_echo_config.h"
+
+/* Exclude the whole file if FreeRTOSIPConfig.h is configured to use UDP only. */
+#if( ipconfigUSE_TCP == 1 )
+
+/* The echo tasks create a socket, send out a number of echo requests, listen
+for the echo reply, then close the socket again before starting over.  This
+delay is used between each iteration to ensure the network does not get too
+congested. */
+#define echoLOOP_DELAY	( ( TickType_t ) 150 / portTICK_PERIOD_MS )
+
+/* The echo server is assumed to be on port 7, which is the standard echo
+protocol port. */
+#define echoECHO_PORT	( 7 )
+
+/* The size of the buffers is a multiple of the MSS - the length of the data
+sent is a pseudo random size between 20 and echoBUFFER_SIZES. */
+#define echoBUFFER_SIZE_MULTIPLIER	( 3 )
+#define echoBUFFER_SIZES			( ipconfigTCP_MSS * echoBUFFER_SIZE_MULTIPLIER )
+
+/* The number of instances of the echo client task to create. */
+#define echoNUM_ECHO_CLIENTS		( 5 )
+
+/*-----------------------------------------------------------*/
+
+/*
+ * Uses a socket to send data to, then receive data from, the standard echo
+ * port number 7.
+ */
+static void prvEchoClientTask( void *pvParameters );
+
+/*
+ * Creates a pseudo random sized buffer of data to send to the echo server.
+ */
+static BaseType_t prvCreateTxData( char *ucBuffer, uint32_t ulBufferLength );
+
+/*-----------------------------------------------------------*/
+
+/* Rx and Tx time outs are used to ensure the sockets do not wait too long for
+missing data. */
+static const TickType_t xReceiveTimeOut = pdMS_TO_TICKS( 4000 );
+static const TickType_t xSendTimeOut = pdMS_TO_TICKS( 2000 );
+
+/* Counters for each created task - for inspection only. */
+static uint32_t ulTxRxCycles[ echoNUM_ECHO_CLIENTS ]  = { 0 },
+				ulTxRxFailures[ echoNUM_ECHO_CLIENTS ] = { 0 },
+				ulConnections[ echoNUM_ECHO_CLIENTS ] = { 0 };
+
+/* Rx and Tx buffers for each created task. */
+static char cTxBuffers[ echoNUM_ECHO_CLIENTS ][ echoBUFFER_SIZES ],
+			cRxBuffers[ echoNUM_ECHO_CLIENTS ][ echoBUFFER_SIZES ];
+
+/*-----------------------------------------------------------*/
+
+void vStartTCPEchoClientTasks_SingleTasks( uint16_t usTaskStackSize, UBaseType_t uxTaskPriority )
+{
+BaseType_t x;
+
+	/* Create the echo client tasks. */
+	for( x = 0; x < echoNUM_ECHO_CLIENTS; x++ )
+	{
+		xTaskCreate( 	prvEchoClientTask,	/* The function that implements the task. */
+						"Echo0",			/* Just a text name for the task to aid debugging. */
+						usTaskStackSize,	/* The stack size is defined in FreeRTOSIPConfig.h. */
+						( void * ) x,		/* The task parameter, not used in this case. */
+						uxTaskPriority,		/* The priority assigned to the task is defined in FreeRTOSConfig.h. */
+						NULL );				/* The task handle is not used. */
+	}
+}
+/*-----------------------------------------------------------*/
+
+static void prvEchoClientTask( void *pvParameters )
+{
+Socket_t xSocket;
+struct freertos_sockaddr xEchoServerAddress;
+int32_t lLoopCount = 0UL;
+const int32_t lMaxLoopCount = 1;
+volatile uint32_t ulTxCount = 0UL;
+BaseType_t xReceivedBytes, xReturned, xInstance;
+BaseType_t lTransmitted, lStringLength;
+char *pcTransmittedString, *pcReceivedString;
+WinProperties_t xWinProps;
+TickType_t xTimeOnEntering;
+
+	/* Fill in the buffer and window sizes that will be used by the socket. */
+	xWinProps.lTxBufSize = 6 * ipconfigTCP_MSS;
+	xWinProps.lTxWinSize = 3;
+	xWinProps.lRxBufSize = 6 * ipconfigTCP_MSS;
+	xWinProps.lRxWinSize = 3;
+
+	/* This task can be created a number of times.  Each instance is numbered
+	to enable each instance to use a different Rx and Tx buffer.  The number is
+	passed in as the task's parameter. */
+	xInstance = ( BaseType_t ) pvParameters;
+
+	/* Point to the buffers to be used by this instance of this task. */
+	pcTransmittedString = &( cTxBuffers[ xInstance ][ 0 ] );
+	pcReceivedString = &( cRxBuffers[ xInstance ][ 0 ] );
+
+	/* Echo requests are sent to the echo server.  The address of the echo
+	server is configured by the constants configECHO_SERVER_ADDR0 to
+	configECHO_SERVER_ADDR3 in FreeRTOSConfig.h. */
+	xEchoServerAddress.sin_port = FreeRTOS_htons( echoECHO_PORT );
+	xEchoServerAddress.sin_addr = FreeRTOS_inet_addr( configECHO_SERVER_ADDR );
+
+	for( ;; )
+	{
+		/* Create a TCP socket. */
+		xSocket = FreeRTOS_socket( FREERTOS_AF_INET, FREERTOS_SOCK_STREAM, FREERTOS_IPPROTO_TCP );
+		configASSERT( xSocket != FREERTOS_INVALID_SOCKET );
+
+		/* Set a time out so a missing reply does not cause the task to block
+		indefinitely. */
+		FreeRTOS_setsockopt( xSocket, 0, FREERTOS_SO_RCVTIMEO, &xReceiveTimeOut, sizeof( xReceiveTimeOut ) );
+		FreeRTOS_setsockopt( xSocket, 0, FREERTOS_SO_SNDTIMEO, &xSendTimeOut, sizeof( xSendTimeOut ) );
+
+		/* Set the window and buffer sizes. */
+		FreeRTOS_setsockopt( xSocket, 0, FREERTOS_SO_WIN_PROPERTIES, ( void * ) &xWinProps,	sizeof( xWinProps ) );
+
+		/* Connect to the echo server. */
+		if( FreeRTOS_connect( xSocket, &xEchoServerAddress, sizeof( xEchoServerAddress ) ) == 0 )
+		{
+			ulConnections[ xInstance ]++;
+
+			/* Send a number of echo requests. */
+			for( lLoopCount = 0; lLoopCount < lMaxLoopCount; lLoopCount++ )
+			{
+				/* Create the string that is sent to the echo server. */
+				lStringLength = prvCreateTxData( pcTransmittedString, echoBUFFER_SIZES );
+
+				/* Add in some unique text at the front of the string. */
+				sprintf( pcTransmittedString, "TxRx message number %u", ulTxCount );
+				ulTxCount++;
+
+				/* Send the string to the socket. */
+				lTransmitted = FreeRTOS_send(	xSocket,						/* The socket being sent to. */
+												( void * ) pcTransmittedString,	/* The data being sent. */
+												lStringLength,					/* The length of the data being sent. */
+												0 );							/* No flags. */
+
+				if( lTransmitted < 0 )
+				{
+					/* Error? */
+					break;
+				}
+
+				/* Clear the buffer into which the echoed string will be
+				placed. */
+				memset( ( void * ) pcReceivedString, 0x00, echoBUFFER_SIZES );
+				xReceivedBytes = 0;
+
+				/* Receive data echoed back to the socket. */
+				while( xReceivedBytes < lTransmitted )
+				{
+					xReturned = FreeRTOS_recv( xSocket,								/* The socket being received from. */
+											&( pcReceivedString[ xReceivedBytes ] ),/* The buffer into which the received data will be written. */
+											 lStringLength - xReceivedBytes,		/* The size of the buffer provided to receive the data. */
+											 0 );									/* No flags. */
+
+					if( xReturned < 0 )
+					{
+						/* Error occurred.  Latch it so it can be detected
+						below. */
+						xReceivedBytes = xReturned;
+						break;
+					}
+					else if( xReturned == 0 )
+					{
+						/* Timed out. */
+						break;
+					}
+					else
+					{
+						/* Keep a count of the bytes received so far. */
+						xReceivedBytes += xReturned;
+					}
+				}
+
+				/* If an error occurred it will be latched in xReceivedBytes,
+				otherwise xReceived bytes will be just that - the number of
+				bytes received from the echo server. */
+				if( xReceivedBytes > 0 )
+				{
+					/* Compare the transmitted string to the received string. */
+					configASSERT( strncmp( pcReceivedString, pcTransmittedString, lTransmitted ) == 0 );
+					if( strncmp( pcReceivedString, pcTransmittedString, lTransmitted ) == 0 )
+					{
+						/* The echo reply was received without error. */
+						ulTxRxCycles[ xInstance ]++;
+					}
+					else
+					{
+						/* The received string did not match the transmitted
+						string. */
+						ulTxRxFailures[ xInstance ]++;
+						break;
+					}
+				}
+				else if( xReceivedBytes < 0 )
+				{
+					/* FreeRTOS_recv() returned an error. */
+					break;
+				}
+				else
+				{
+					/* Timed out without receiving anything? */
+					break;
+				}
+			}
+
+			/* Finished using the connected socket, initiate a graceful close:
+			FIN, FIN+ACK, ACK. */
+			FreeRTOS_shutdown( xSocket, FREERTOS_SHUT_RDWR );
+
+			/* Expect FreeRTOS_recv() to return an error once the shutdown is
+			complete. */
+			xTimeOnEntering = xTaskGetTickCount();
+			do
+			{
+				xReturned = FreeRTOS_recv( xSocket,	/* The socket being received from. */
+					&( pcReceivedString[ 0 ] ),		/* The buffer into which the received data will be written. */
+					echoBUFFER_SIZES,				/* The size of the buffer provided to receive the data. */
+					0 );
+
+				if( xReturned < 0 )
+				{
+					break;
+				}
+
+			} while( ( xTaskGetTickCount() - xTimeOnEntering ) < xReceiveTimeOut );
+		}
+
+		/* Close this socket before looping back to create another. */
+		FreeRTOS_closesocket( xSocket );
+
+		/* Pause for a short while to ensure the network is not too
+		congested. */
+		vTaskDelay( echoLOOP_DELAY );
+	}
+}
+/*-----------------------------------------------------------*/
+
+static BaseType_t prvCreateTxData( char *cBuffer, uint32_t ulBufferLength )
+{
+BaseType_t lCharactersToAdd, lCharacter;
+char cChar = '0';
+const BaseType_t lMinimumLength = 60;
+uint32_t ulRandomNumber;
+
+	/* Randomise the number of characters that will be sent in the echo
+	request. */
+	do
+	{
+                ( void ) xApplicationGetRandomNumber( &ulRandomNumber );
+		lCharactersToAdd = ulRandomNumber % ( ulBufferLength - 20UL );
+	} while ( ( lCharactersToAdd == 0 ) || ( lCharactersToAdd < lMinimumLength ) ); /* Must be at least enough to add the unique text to the start of the string later. */
+
+	/* Fill the buffer. */
+	for( lCharacter = 0; lCharacter < lCharactersToAdd; lCharacter++ )
+	{
+		cBuffer[ lCharacter ] = cChar;
+		cChar++;
+
+		if( cChar > '~' )
+		{
+			cChar = '0';
+		}
+	}
+
+	return lCharactersToAdd;
+}
+/*-----------------------------------------------------------*/
+
+BaseType_t xAreSingleTaskTCPEchoClientsStillRunning( void )
+{
+static uint32_t ulLastEchoSocketCount[ echoNUM_ECHO_CLIENTS ] = { 0 }, ulLastConnections[ echoNUM_ECHO_CLIENTS ] = { 0 };
+BaseType_t xReturn = pdPASS, x;
+
+	/* Return fail is the number of cycles does not increment between
+	consecutive calls. */
+	for( x = 0; x < echoNUM_ECHO_CLIENTS; x++ )
+	{
+		if( ulTxRxCycles[ x ] == ulLastEchoSocketCount[ x ] )
+		{
+			xReturn = pdFAIL;
+		}
+		else
+		{
+			ulLastEchoSocketCount[ x ] = ulTxRxCycles[ x ];
+		}
+
+		if( ulConnections[ x ] == ulLastConnections[ x ] )
+		{
+			xReturn = pdFAIL;
+		}
+		else
+		{
+			ulConnections[ x ] = ulLastConnections[ x ];
+		}
+	}
+
+	return xReturn;
+}
+
+#endif /* ipconfigUSE_TCP */
+

DemoTasks/include/SimpleTCPEchoServer.h

@@ -0,0 +1,76 @@
+/*
+    FreeRTOS V202212.00
+    All rights reserved
+
+    VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
+
+    This file is part of the FreeRTOS distribution.
+
+    FreeRTOS is free software; you can redistribute it and/or modify it under
+    the terms of the GNU General Public License (version 2) as published by the
+    Free Software Foundation >>!AND MODIFIED BY!<< the FreeRTOS exception.
+
+    ***************************************************************************
+    >>!   NOTE: The modification to the GPL is included to allow you to     !<<
+    >>!   distribute a combined work that includes FreeRTOS without being   !<<
+    >>!   obliged to provide the source code for proprietary components     !<<
+    >>!   outside of the FreeRTOS kernel.                                   !<<
+    ***************************************************************************
+
+    FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
+    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+    FOR A PARTICULAR PURPOSE.  Full license text is available on the following
+    link: http://www.freertos.org/a00114.html
+
+    ***************************************************************************
+     *                                                                       *
+     *    FreeRTOS provides completely free yet professionally developed,    *
+     *    robust, strictly quality controlled, supported, and cross          *
+     *    platform software that is more than just the market leader, it     *
+     *    is the industry's de facto standard.                               *
+     *                                                                       *
+     *    Help yourself get started quickly while simultaneously helping     *
+     *    to support the FreeRTOS project by purchasing a FreeRTOS           *
+     *    tutorial book, reference manual, or both:                          *
+     *    http://www.FreeRTOS.org/Documentation                              *
+     *                                                                       *
+    ***************************************************************************
+
+    http://www.FreeRTOS.org/FAQHelp.html - Having a problem?  Start by reading
+    the FAQ page "My application does not run, what could be wrong?".  Have you
+    defined configASSERT()?
+
+    http://www.FreeRTOS.org/support - In return for receiving this top quality
+    embedded software for free we request you assist our global community by
+    participating in the support forum.
+
+    http://www.FreeRTOS.org/training - Investing in training allows your team to
+    be as productive as possible as early as possible.  Now you can receive
+    FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers
+    Ltd, and the world's leading authority on the world's leading RTOS.
+
+    http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
+    including FreeRTOS+Trace - an indispensable productivity tool, a DOS
+    compatible FAT file system, and our tiny thread aware UDP/IP stack.
+
+    http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.
+    Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.
+
+    http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High
+    Integrity Systems ltd. to sell under the OpenRTOS brand.  Low cost OpenRTOS
+    licenses offer ticketed support, indemnification and commercial middleware.
+
+    http://www.SafeRTOS.com - High Integrity Systems also provide a safety
+    engineered and independently SIL3 certified version for use in safety and
+    mission critical applications that require provable dependability.
+
+    1 tab == 4 spaces!
+*/
+
+#ifndef SIMPLE_TCP_ECHO_SERVER_H
+#define SIMPLE_TCP_ECHO_SERVER_H
+
+void vStartSimpleTCPServerTasks( uint16_t usStackSize, BaseType_t uxPriority );
+BaseType_t xAreTCPEchoServersStillRunning( void );
+
+#endif /* SIMPLE_TCP_ECHO_SERVER_H */

DemoTasks/include/SimpleUDPClientAndServer.h

@@ -0,0 +1,32 @@
+/*
+ * FreeRTOS V202212.00
+ * Copyright (C) 2017 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * https://www.FreeRTOS.org
+ * https://aws.amazon.com/freertos
+ *
+ */
+
+#ifndef SIMPLE_UDP_CLIENT_AND_SERVER_H
+#define SIMPLE_UDP_CLIENT_AND_SERVER_H
+
+void vStartSimpleUDPClientServerTasks( uint16_t usStackSize, uint32_t ulsPort, UBaseType_t uxPriority );
+
+#endif /* SIMPLE_UDPCLIENT_AND_SERVER_H */

DemoTasks/include/TCPEchoClient_SingleTasks.h

@@ -0,0 +1,39 @@
+/*
+ * FreeRTOS V202212.00
+ * Copyright (C) 2017 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * https://www.FreeRTOS.org
+ * https://aws.amazon.com/freertos
+ *
+ */
+
+#ifndef SINGLE_TASK_TCP_ECHO_CLIENTS_H
+#define SINGLE_TASK_TCP_ECHO_CLIENTS_H
+
+/*
+ * Create the TCP echo client tasks.  This is the version where an echo request
+ * is made from the same task that listens for the echo reply.
+ */
+void vStartTCPEchoClientTasks_SingleTasks( uint16_t usTaskStackSize, UBaseType_t uxTaskPriority );
+BaseType_t xAreSingleTaskTCPEchoClientsStillRunning( void );
+
+#endif /* SINGLE_TASK_TCP_ECHO_CLIENTS_H */
+
+

DemoTasks/include/tcp_echo_config.h

@@ -0,0 +1,35 @@
+/*
+ * FreeRTOS V202212.00
+ * Copyright (C) 2020 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * https://www.FreeRTOS.org
+ * https://github.com/FreeRTOS
+ *
+ */
+
+/* TCP Echo Demo configuration */
+
+#ifndef TCP_ECHO_CONFIG_H_
+#define TCP_ECHO_CONFIG_H_
+
+#define configECHO_SERVER_ADDR    "127.0.0.1"
+#define configECHO_SERVER_PORT    ( 9000U )
+
+#endif /* TCP_ECHO_CONFIG_H_ */

Test_project_for_GD32107C-EVAL.uvoptx

@@ -229,7 +229,7 @@
       <GroupNumber>1</GroupNumber>
       <FileNumber>1</FileNumber>
       <FileType>1</FileType>
-      <tvExp>0</tvExp>
+      <tvExp>1</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
       <bDave2>0</bDave2>
       <PathWithFileName>.\main.c</PathWithFileName>
@@ -241,7 +241,7 @@
       <GroupNumber>1</GroupNumber>
       <FileNumber>2</FileNumber>
       <FileType>1</FileType>
-      <tvExp>0</tvExp>
+      <tvExp>1</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
       <bDave2>0</bDave2>
       <PathWithFileName>.\DemoTasks\SimpleTCPEchoServer.c</PathWithFileName>
@@ -253,7 +253,7 @@
       <GroupNumber>1</GroupNumber>
       <FileNumber>3</FileNumber>
       <FileType>1</FileType>
-      <tvExp>1</tvExp>
+      <tvExp>0</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
       <bDave2>0</bDave2>
       <PathWithFileName>.\DemoTasks\SimpleUDPClientAndServer.c</PathWithFileName>
@@ -277,7 +277,7 @@
 
   <Group>
     <GroupName>FreeRTOS</GroupName>
-    <tvExp>0</tvExp>
+    <tvExp>1</tvExp>
     <tvExpOptDlg>0</tvExpOptDlg>
     <cbSel>0</cbSel>
     <RteFlg>0</RteFlg>
@@ -501,7 +501,7 @@
       <GroupNumber>2</GroupNumber>
       <FileNumber>23</FileNumber>
       <FileType>1</FileType>
-      <tvExp>0</tvExp>
+      <tvExp>1</tvExp>
       <tvExpOptDlg>0</tvExpOptDlg>
       <bDave2>0</bDave2>
       <PathWithFileName>.\FreeRTOS\source\FreeRTOS_TCP_Utils.c</PathWithFileName>

main.c

@@ -4,9 +4,14 @@
 #include "gd32f10x_gpio.h"
 #include "stdio.h"
 /* System application includes. */
+#include "FreeRTOSIPConfig.h"
+
+/* Demo application includes. */
 #include "FreeRTOS_IP.h"
 #include "FreeRTOS_Sockets.h"
-#include "FreeRTOS_DHCP.h"
+#include "SimpleUDPClientAndServer.h"
+#include "SimpleTCPEchoServer.h"
+#include "TCPEchoClient_SingleTasks.h"
 
 #define BUTTON_USER GPIO_PIN_14
 
@@ -25,6 +30,22 @@
 #define mainCREATE_TCP_ECHO_TASKS_SINGLE              0
 #define mainCREATE_TCP_ECHO_SERVER_TASK               0
 
+/* Simple UDP client and server task parameters. */
+#define mainSIMPLE_UDP_CLIENT_SERVER_TASK_PRIORITY    ( tskIDLE_PRIORITY )
+#define mainSIMPLE_UDP_CLIENT_SERVER_PORT             ( 5005UL )
+
+/* Echo client task parameters - used for both TCP and UDP echo clients. */
+#define mainECHO_CLIENT_TASK_STACK_SIZE               ( configMINIMAL_STACK_SIZE * 2 )      /* Not used in the Windows port. */
+#define mainECHO_CLIENT_TASK_PRIORITY                 ( tskIDLE_PRIORITY + 1 )
+
+/* Echo server task parameters. */
+#define mainECHO_SERVER_TASK_STACK_SIZE               ( configMINIMAL_STACK_SIZE * 2 )      /* Not used in the Windows port. */
+#define mainECHO_SERVER_TASK_PRIORITY                 ( tskIDLE_PRIORITY + 1 )
+
+/* Define a name that will be used for LLMNR and NBNS searches. */
+//#define mainHOST_NAME                                 "RTOSDemo"
+//#define mainDEVICE_NICK_NAME                          "windows_demo"
+
 /* Default MAC address configuration.  The demo creates a virtual network
  * connection that uses this MAC address by accessing the raw Ethernet data
  * to and from a real network connection on the host PC.  See the