2 FreeRTOS V9.0.0rc1 - Copyright (C) 2016 Real Time Engineers Ltd.
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5 VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
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7 This file is part of the FreeRTOS distribution.
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9 FreeRTOS is free software; you can redistribute it and/or modify it under
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10 the terms of the GNU General Public License (version 2) as published by the
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11 Free Software Foundation >>>> AND MODIFIED BY <<<< the FreeRTOS exception.
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13 ***************************************************************************
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14 >>! NOTE: The modification to the GPL is included to allow you to !<<
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15 >>! distribute a combined work that includes FreeRTOS without being !<<
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16 >>! obliged to provide the source code for proprietary components !<<
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17 >>! outside of the FreeRTOS kernel. !<<
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18 ***************************************************************************
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20 FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
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21 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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22 FOR A PARTICULAR PURPOSE. Full license text is available on the following
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23 link: http://www.freertos.org/a00114.html
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25 ***************************************************************************
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27 * FreeRTOS provides completely free yet professionally developed, *
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28 * robust, strictly quality controlled, supported, and cross *
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29 * platform software that is more than just the market leader, it *
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30 * is the industry's de facto standard. *
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32 * Help yourself get started quickly while simultaneously helping *
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33 * to support the FreeRTOS project by purchasing a FreeRTOS *
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34 * tutorial book, reference manual, or both: *
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35 * http://www.FreeRTOS.org/Documentation *
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37 ***************************************************************************
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39 http://www.FreeRTOS.org/FAQHelp.html - Having a problem? Start by reading
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40 the FAQ page "My application does not run, what could be wrong?". Have you
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41 defined configASSERT()?
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43 http://www.FreeRTOS.org/support - In return for receiving this top quality
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44 embedded software for free we request you assist our global community by
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45 participating in the support forum.
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47 http://www.FreeRTOS.org/training - Investing in training allows your team to
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48 be as productive as possible as early as possible. Now you can receive
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49 FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers
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50 Ltd, and the world's leading authority on the world's leading RTOS.
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52 http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
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53 including FreeRTOS+Trace - an indispensable productivity tool, a DOS
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54 compatible FAT file system, and our tiny thread aware UDP/IP stack.
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56 http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.
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57 Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.
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59 http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High
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60 Integrity Systems ltd. to sell under the OpenRTOS brand. Low cost OpenRTOS
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61 licenses offer ticketed support, indemnification and commercial middleware.
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63 http://www.SafeRTOS.com - High Integrity Systems also provide a safety
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64 engineered and independently SIL3 certified version for use in safety and
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65 mission critical applications that require provable dependability.
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71 * A number of sockets are created and added to a set. One task then blocks on
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72 * the set while the other task sends data to a (pseudo) random member of the
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76 /* Standard includes. */
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80 /* FreeRTOS includes. */
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81 #include "FreeRTOS.h"
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84 /* FreeRTOS+UDP includes. */
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85 #include "FreeRTOS_UDP_IP.h"
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86 #include "FreeRTOS_Sockets.h"
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88 #define selTINY_DELAY ( ( TickType_t ) 2 )
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89 #define selNUMBER_OF_SOCKETS ( 3 )
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90 #define selSELECT_QUEUE_SIZE ( selNUMBER_OF_SOCKETS * 2 )
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93 * Sends data to multiple different sockets.
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95 static void prvMultipleSocketTxTask( void *pvParameters );
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98 * Uses the FreeRTOS_select() API function to receive from multiple sockets.
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100 static void prvMultipleSocketRxTask( void *pvParameters );
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102 /*-----------------------------------------------------------*/
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104 static xSocket_t xRxSockets[ selNUMBER_OF_SOCKETS ] = { 0 };
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106 /*-----------------------------------------------------------*/
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108 void vStartSelectUDPServerTasks( uint16_t usStackSize, uint32_t ulFirstPortNumber, UBaseType_t uxPriority )
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110 /* Create task that sends to multiple sockets, and the task that uses the
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111 FreeRTOS_select() function to receive from multiple sockets. The first
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112 port number to use is passed into both tasks using the task's parameter.
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113 Other port numbers are consecutive from the first. */
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114 xTaskCreate( prvMultipleSocketTxTask, "MultiTx", usStackSize, ( void * ) ulFirstPortNumber, uxPriority, NULL );
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115 xTaskCreate( prvMultipleSocketRxTask, "MultiRx", usStackSize, ( void * ) ulFirstPortNumber, uxPriority, NULL );
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117 /*-----------------------------------------------------------*/
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119 static void prvMultipleSocketRxTask( void *pvParameters )
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121 xSocketSet_t xFD_Set;
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123 struct freertos_sockaddr xAddress;
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124 uint32_t xClientLength = sizeof( struct freertos_sockaddr ), ulFirstRxPortNumber, x;
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125 uint32_t ulReceivedValue = 0, ulExpectedValue = 0UL, ulReceivedCount[ selNUMBER_OF_SOCKETS ] = { 0 };
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127 const TickType_t xRxBlockTime = 0;
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129 /* The number of the port the first Rx socket will be bound to is passed in
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130 as the task parameter. Other port numbers used are consecutive from this. */
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131 ulFirstRxPortNumber = ( uint32_t ) pvParameters;
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133 /* Create the set of sockets that will be passed into FreeRTOS_select(). */
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134 xFD_Set = FreeRTOS_CreateSocketSet( selSELECT_QUEUE_SIZE );
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136 for( x = 0; x < selNUMBER_OF_SOCKETS; x++ )
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138 /* Create the next Rx socket. */
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139 xRxSockets[ x ] = FreeRTOS_socket( FREERTOS_AF_INET, FREERTOS_SOCK_DGRAM, FREERTOS_IPPROTO_UDP );
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140 configASSERT( xRxSockets[ x ] );
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142 /* Bind to the next port number. */
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143 xAddress.sin_port = FreeRTOS_htons( ( uint16_t ) ( ulFirstRxPortNumber + x ) );
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144 FreeRTOS_bind( xRxSockets[ x ], &xAddress, sizeof( struct freertos_sockaddr ) );
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146 /* There should always be data available on the socket returned from
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147 FreeRTOS_select() so blocking on a read should not be necessary. */
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148 FreeRTOS_setsockopt( xRxSockets[ x ], 0, FREERTOS_SO_RCVTIMEO, &xRxBlockTime, sizeof( xRxBlockTime ) );
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150 /* Add the created socket to the set. */
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151 FreeRTOS_FD_SET( xRxSockets[ x ], xFD_Set );
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156 /* Wait for a socket from the set to become available for reading. */
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157 xSocket = FreeRTOS_select( xFD_Set, portMAX_DELAY );
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159 /* xSocket should never be NULL because FreeRTOS_select() was called
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160 with an indefinite delay (assuming INCLUDE_vTaskSuspend is set to 1). */
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161 configASSERT( xSocket );
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163 lBytes = FreeRTOS_recvfrom( xSocket, &( ulReceivedValue ), sizeof( uint32_t ), 0, &xAddress, &xClientLength );
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165 /* It is possible that the first value received will not be zero
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166 because the first few transmitted packets may have been dropped to
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167 send an ARP and then wait the ARP reply. */
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168 if( ulExpectedValue == 0 )
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170 if( ulExpectedValue != ulReceivedValue )
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172 /* Correct for packets lost to ARP traffic. */
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173 ulExpectedValue = ulReceivedValue;
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177 /* Data should always be available even though the block time was set
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178 to zero because the socket was returned from FreeRTOS_select(). */
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179 configASSERT( lBytes == 4 );
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180 configASSERT( ulReceivedValue == ulExpectedValue );
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184 /* Keep a record of the number of times each socket has been used so it
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185 can be verified (using the debugger) that they all get used. */
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186 for( x= 0; x < selNUMBER_OF_SOCKETS; x++ )
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188 if( xSocket == xRxSockets[ x ] )
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190 ( ulReceivedCount[ x ] )++;
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196 /*-----------------------------------------------------------*/
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198 static void prvMultipleSocketTxTask( void *pvParameters )
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200 uint32_t ulTxValue = 0;
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201 struct freertos_sockaddr xDestinationAddress;
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202 uint32_t ulIPAddress, ulFirstDestinationPortNumber, xPortNumber;
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203 xSocket_t xTxSocket;
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204 const TickType_t xShortDelay = 100 / portTICK_RATE_MS, xSendBlockTime = 500 / portTICK_RATE_MS;
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206 srand( ( unsigned int ) &xPortNumber );
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208 /* The first destination port number is passed in as the task parameter.
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209 Other destination port numbers used are consecutive from this. */
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210 ulFirstDestinationPortNumber = ( uint32_t ) pvParameters;
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212 /* Create the socket used to send to the sockets created by the Rx task.
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213 Let the IP stack select a port to bind to. */
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214 xTxSocket = FreeRTOS_socket( FREERTOS_AF_INET, FREERTOS_SOCK_DGRAM, FREERTOS_IPPROTO_UDP );
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215 FreeRTOS_bind( xTxSocket, NULL, sizeof( struct freertos_sockaddr ) );
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217 /* The Rx and Tx tasks execute at the same priority so it is possible that
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218 the Tx task will fill up the send queue - set a Tx block time to ensure
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219 flow control is managed if this happens. */
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220 FreeRTOS_setsockopt( xTxSocket, 0, FREERTOS_SO_SNDTIMEO, &xSendBlockTime, sizeof( xSendBlockTime ) );
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222 /* It is assumed that this task is not created until the network is up,
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223 so the IP address can be obtained immediately. Store the IP address being
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224 used in ulIPAddress. This is done so the socket can send to a different
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225 port on the same IP address. */
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226 FreeRTOS_GetAddressConfiguration( &ulIPAddress, NULL, NULL, NULL );
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228 /* This test sends to itself, so data sent from here is received by a server
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229 socket on the same IP address. Setup the freertos_sockaddr structure with
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230 this nodes IP address. */
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231 xDestinationAddress.sin_addr = ulIPAddress;
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233 /* Block for a short time to ensure the task implemented by the
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234 prvMultipleSocketRxTask() function has finished creating the Rx sockets. */
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235 vTaskDelay( xShortDelay );
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239 /* Pseudo randomly select the destination port number from the range of
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240 valid destination port numbers. */
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241 xPortNumber = rand() % selNUMBER_OF_SOCKETS;
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242 xDestinationAddress.sin_port = ( uint16_t ) ( ulFirstDestinationPortNumber + xPortNumber );
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243 xDestinationAddress.sin_port = FreeRTOS_htons( xDestinationAddress.sin_port );
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245 /* Send an incrementing value. */
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246 FreeRTOS_sendto( xTxSocket, &ulTxValue, sizeof( ulTxValue ), 0, &xDestinationAddress, sizeof( xDestinationAddress ) );
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249 /* Delay here because in the Windows simulator the MAC interrupt
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250 simulator delays, so network trafic cannot be received any faster
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252 vTaskDelay( configWINDOWS_MAC_INTERRUPT_SIMULATOR_DELAY );
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