2 * FreeRTOS Kernel V10.2.1
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3 * Copyright (C) 2017 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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5 * Permission is hereby granted, free of charge, to any person obtaining a copy of
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6 * this software and associated documentation files (the "Software"), to deal in
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7 * the Software without restriction, including without limitation the rights to
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8 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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9 * the Software, and to permit persons to whom the Software is furnished to do so,
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10 * subject to the following conditions:
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12 * The above copyright notice and this permission notice shall be included in all
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13 * copies or substantial portions of the Software.
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15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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17 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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18 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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19 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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20 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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22 * http://www.FreeRTOS.org
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23 * http://aws.amazon.com/freertos
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25 * 1 tab == 4 spaces!
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29 * This project is a cut down version of the project described on the following
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30 * link. Only the simple UDP client and server and the TCP echo clients are
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31 * included in the build:
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32 * http://www.freertos.org/FreeRTOS-Plus/FreeRTOS_Plus_TCP/examples_FreeRTOS_simulator.html
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35 /* Standard includes. */
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39 /* Visual studio intrinsics used so the __debugbreak() function is available
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40 should an assert get hit. */
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43 /* FreeRTOS includes. */
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44 #include <FreeRTOS.h>
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47 /* TCP/IP stack includes. */
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48 #include "FreeRTOS_IP.h"
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49 #include "FreeRTOS_Sockets.h"
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51 /* Demo app includes. */
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52 #include "demo_logging.h"
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54 /* Set the following constants to 1 or 0 to define which tasks to include and
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57 mainCREATE_SIMPLE_UDP_CLIENT_SERVER_TASKS: When set to 1 two UDP client tasks
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58 and two UDP server tasks are created. The clients talk to the servers. One set
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59 of tasks use the standard sockets interface, and the other the zero copy sockets
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60 interface. These tasks are self checking and will trigger a configASSERT() if
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61 they detect a difference in the data that is received from that which was sent.
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62 As these tasks use UDP, and can therefore loose packets, they will cause
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63 configASSERT() to be called when they are run in a less than perfect networking
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66 mainCREATE_SIMPLE_MQTT_EXAMPLE_TASKS: TBD
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68 #define mainCREATE_SIMPLE_UDP_CLIENT_SERVER_TASKS 1
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69 #define mainCREATE_SIMPLE_MQTT_EXAMPLE_TASKS 0
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71 /* Simple UDP client and server task parameters. */
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72 #define mainSIMPLE_UDP_CLIENT_SERVER_TASK_PRIORITY ( tskIDLE_PRIORITY )
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73 #define mainSIMPLE_UDP_CLIENT_SERVER_PORT ( 5005UL )
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76 * Prototypes for the demos that can be started from this project.
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78 extern void vStartSimpleMQTTDemo( void );
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79 extern void vStartSimpleUDPClientServerTasks( uint16_t usStackSize, uint32_t ulsPort, UBaseType_t uxPriority );
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82 * Just seeds the simple pseudo random number generator.
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85 * This is not a secure method of generating random numbers and production
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86 * devices should use a true random number generator (TRNG).
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88 static void prvSRand( UBaseType_t ulSeed );
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91 * Miscellaneous initialisation including preparing the logging and seeding the
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92 * random number generator.
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94 static void prvMiscInitialisation( void );
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96 /* The default IP and MAC address used by the demo. The address configuration
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97 defined here will be used if ipconfigUSE_DHCP is 0, or if ipconfigUSE_DHCP is
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98 1 but a DHCP server could not be contacted. See the online documentation for
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99 more information. */
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100 static const uint8_t ucIPAddress[ 4 ] = { configIP_ADDR0, configIP_ADDR1, configIP_ADDR2, configIP_ADDR3 };
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101 static const uint8_t ucNetMask[ 4 ] = { configNET_MASK0, configNET_MASK1, configNET_MASK2, configNET_MASK3 };
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102 static const uint8_t ucGatewayAddress[ 4 ] = { configGATEWAY_ADDR0, configGATEWAY_ADDR1, configGATEWAY_ADDR2, configGATEWAY_ADDR3 };
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103 static const uint8_t ucDNSServerAddress[ 4 ] = { configDNS_SERVER_ADDR0, configDNS_SERVER_ADDR1, configDNS_SERVER_ADDR2, configDNS_SERVER_ADDR3 };
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105 /* Set the following constant to pdTRUE to log using the method indicated by the
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106 name of the constant, or pdFALSE to not log using the method indicated by the
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107 name of the constant. Options include to standard out (xLogToStdout), to a disk
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108 file (xLogToFile), and to a UDP port (xLogToUDP). If xLogToUDP is set to pdTRUE
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109 then UDP messages are sent to the IP address configured as the echo server
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110 address (see the configECHO_SERVER_ADDR0 definitions in FreeRTOSConfig.h) and
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111 the port number set by configPRINT_PORT in FreeRTOSConfig.h. */
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112 const BaseType_t xLogToStdout = pdTRUE, xLogToFile = pdFALSE, xLogToUDP = pdFALSE;
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114 /* Default MAC address configuration. The demo creates a virtual network
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115 connection that uses this MAC address by accessing the raw Ethernet data
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116 to and from a real network connection on the host PC. See the
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117 configNETWORK_INTERFACE_TO_USE definition for information on how to configure
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118 the real network connection to use. */
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119 const uint8_t ucMACAddress[ 6 ] = { configMAC_ADDR0, configMAC_ADDR1, configMAC_ADDR2, configMAC_ADDR3, configMAC_ADDR4, configMAC_ADDR5 };
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121 /* Use by the pseudo random number generator. */
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122 static UBaseType_t ulNextRand;
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123 /*-----------------------------------------------------------*/
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128 * Instructions for using this project are provided on:
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132 /* Miscellaneous initialisation including preparing the logging and seeding
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133 the random number generator. */
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134 prvMiscInitialisation();
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136 /* Initialise the network interface.
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138 ***NOTE*** Tasks that use the network are created in the network event hook
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139 when the network is connected and ready for use (see the implementation of
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140 vApplicationIPNetworkEventHook() below). The address values passed in here
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141 are used if ipconfigUSE_DHCP is set to 0, or if ipconfigUSE_DHCP is set to 1
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142 but a DHCP server cannot be contacted. */
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143 FreeRTOS_IPInit( ucIPAddress, ucNetMask, ucGatewayAddress, ucDNSServerAddress, ucMACAddress );
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145 /* Start the RTOS scheduler. */
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146 vTaskStartScheduler();
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148 /* If all is well, the scheduler will now be running, and the following
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149 line will never be reached. If the following line does execute, then
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150 there was insufficient FreeRTOS heap memory available for the idle and/or
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151 timer tasks to be created. See the memory management section on the
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152 FreeRTOS web site for more details (this is standard text that is not not
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153 really applicable to the Win32 simulator port). */
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159 /*-----------------------------------------------------------*/
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161 void vAssertCalled( const char *pcFile, uint32_t ulLine )
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163 volatile uint32_t ulBlockVariable = 0UL;
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164 volatile char *pcFileName = ( volatile char * ) pcFile;
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165 volatile uint32_t ulLineNumber = ulLine;
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167 ( void ) pcFileName;
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168 ( void ) ulLineNumber;
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170 printf( "vAssertCalled( %s, %u\n", pcFile, ulLine );
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172 /* Setting ulBlockVariable to a non-zero value in the debugger will allow
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173 this function to be exited. */
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174 taskDISABLE_INTERRUPTS();
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176 while( ulBlockVariable == 0UL )
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181 taskENABLE_INTERRUPTS();
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183 /*-----------------------------------------------------------*/
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185 /* Called by FreeRTOS+TCP when the network connects or disconnects. Disconnect
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186 events are only received if implemented in the MAC driver. */
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187 void vApplicationIPNetworkEventHook( eIPCallbackEvent_t eNetworkEvent )
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189 uint32_t ulIPAddress, ulNetMask, ulGatewayAddress, ulDNSServerAddress;
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190 char cBuffer[ 16 ];
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191 static BaseType_t xTasksAlreadyCreated = pdFALSE;
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193 /* If the network has just come up...*/
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194 if( eNetworkEvent == eNetworkUp )
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196 /* Create the tasks that use the IP stack if they have not already been
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198 if( xTasksAlreadyCreated == pdFALSE )
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200 #if( mainCREATE_SIMPLE_UDP_CLIENT_SERVER_TASKS == 1 )
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202 vStartSimpleUDPClientServerTasks( configMINIMAL_STACK_SIZE, mainSIMPLE_UDP_CLIENT_SERVER_PORT, mainSIMPLE_UDP_CLIENT_SERVER_TASK_PRIORITY );
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206 #if( mainCREATE_SIMPLE_MQTT_EXAMPLE_TASKS == 1 )
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208 vStartSimpleMQTTDemo();
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212 xTasksAlreadyCreated = pdTRUE;
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215 /* Print out the network configuration, which may have come from a DHCP
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217 FreeRTOS_GetAddressConfiguration( &ulIPAddress, &ulNetMask, &ulGatewayAddress, &ulDNSServerAddress );
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218 FreeRTOS_inet_ntoa( ulIPAddress, cBuffer );
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219 FreeRTOS_printf( ( "\r\n\r\nIP Address: %s\r\n", cBuffer ) );/*_RB_ Should use IoT libraries logging. */
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221 FreeRTOS_inet_ntoa( ulNetMask, cBuffer );
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222 FreeRTOS_printf( ( "Subnet Mask: %s\r\n", cBuffer ) );
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224 FreeRTOS_inet_ntoa( ulGatewayAddress, cBuffer );
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225 FreeRTOS_printf( ( "Gateway Address: %s\r\n", cBuffer ) );
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227 FreeRTOS_inet_ntoa( ulDNSServerAddress, cBuffer );
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228 FreeRTOS_printf( ( "DNS Server Address: %s\r\n\r\n\r\n", cBuffer ) );
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231 /*-----------------------------------------------------------*/
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233 UBaseType_t uxRand( void )
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235 const uint32_t ulMultiplier = 0x015a4e35UL, ulIncrement = 1UL;
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238 * Utility function to generate a pseudo random number.
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241 * This is not a secure method of generating a random number. Production
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242 * devices should use a True Random Number Generator (TRNG).
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244 ulNextRand = ( ulMultiplier * ulNextRand ) + ulIncrement;
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245 return( ( int ) ( ulNextRand >> 16UL ) & 0x7fffUL );
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247 /*-----------------------------------------------------------*/
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249 static void prvSRand( UBaseType_t ulSeed )
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251 /* Utility function to seed the pseudo random number generator. */
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252 ulNextRand = ulSeed;
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254 /*-----------------------------------------------------------*/
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256 static void prvMiscInitialisation( void )
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259 uint32_t ulLoggingIPAddress;
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261 ulLoggingIPAddress = FreeRTOS_inet_addr_quick( configECHO_SERVER_ADDR0, configECHO_SERVER_ADDR1, configECHO_SERVER_ADDR2, configECHO_SERVER_ADDR3 );
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262 vLoggingInit( xLogToStdout, xLogToFile, xLogToUDP, ulLoggingIPAddress, configPRINT_PORT );
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264 /* Seed the random number generator. */
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266 FreeRTOS_debug_printf( ( "Seed for randomiser: %lu\n", xTimeNow ) );
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267 prvSRand( ( uint32_t ) xTimeNow );
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268 FreeRTOS_debug_printf( ( "Random numbers: %08X %08X %08X %08X\n", ipconfigRAND32(), ipconfigRAND32(), ipconfigRAND32(), ipconfigRAND32() ) );
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270 /*-----------------------------------------------------------*/
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272 #if( ipconfigUSE_LLMNR != 0 ) || ( ipconfigUSE_NBNS != 0 ) || ( ipconfigDHCP_REGISTER_HOSTNAME == 1 )
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274 const char *pcApplicationHostnameHook( void )
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276 /* Assign the name "FreeRTOS" to this network node. This function will
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277 be called during the DHCP: the machine will be registered with an IP
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278 address plus this name. */
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279 return mainHOST_NAME;
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283 /*-----------------------------------------------------------*/
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285 #if( ipconfigUSE_LLMNR != 0 ) || ( ipconfigUSE_NBNS != 0 )
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287 BaseType_t xApplicationDNSQueryHook( const char *pcName )
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289 BaseType_t xReturn;
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291 /* Determine if a name lookup is for this node. Two names are given
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292 to this node: that returned by pcApplicationHostnameHook() and that set
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293 by mainDEVICE_NICK_NAME. */
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294 if( _stricmp( pcName, pcApplicationHostnameHook() ) == 0 )
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298 else if( _stricmp( pcName, mainDEVICE_NICK_NAME ) == 0 )
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311 /*-----------------------------------------------------------*/
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314 * Callback that provides the inputs necessary to generate a randomized TCP
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315 * Initial Sequence Number per RFC 6528. THIS IS ONLY A DUMMY IMPLEMENTATION
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316 * THAT RETURNS A PSEUDO RANDOM NUMBER SO IS NOT INTENDED FOR USE IN PRODUCTION
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319 extern uint32_t ulApplicationGetNextSequenceNumber( uint32_t ulSourceAddress,
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320 uint16_t usSourcePort,
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321 uint32_t ulDestinationAddress,
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322 uint16_t usDestinationPort )
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324 ( void ) ulSourceAddress;
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325 ( void ) usSourcePort;
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326 ( void ) ulDestinationAddress;
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327 ( void ) usDestinationPort;
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331 /*-----------------------------------------------------------*/
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333 /* configUSE_STATIC_ALLOCATION is set to 1, so the application must provide an
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334 implementation of vApplicationGetIdleTaskMemory() to provide the memory that is
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335 used by the Idle task. */
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336 void vApplicationGetIdleTaskMemory( StaticTask_t** ppxIdleTaskTCBBuffer, StackType_t** ppxIdleTaskStackBuffer, uint32_t* pulIdleTaskStackSize )
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338 /* If the buffers to be provided to the Idle task are declared inside this
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339 function then they must be declared static - otherwise they will be allocated on
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340 the stack and so not exists after this function exits. */
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341 static StaticTask_t xIdleTaskTCB;
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342 static StackType_t uxIdleTaskStack[configMINIMAL_STACK_SIZE];
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344 /* Pass out a pointer to the StaticTask_t structure in which the Idle task's
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345 state will be stored. */
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346 *ppxIdleTaskTCBBuffer = &xIdleTaskTCB;
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348 /* Pass out the array that will be used as the Idle task's stack. */
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349 *ppxIdleTaskStackBuffer = uxIdleTaskStack;
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351 /* Pass out the size of the array pointed to by *ppxIdleTaskStackBuffer.
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352 Note that, as the array is necessarily of type StackType_t,
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353 configMINIMAL_STACK_SIZE is specified in words, not bytes. */
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354 *pulIdleTaskStackSize = configMINIMAL_STACK_SIZE;
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356 /*-----------------------------------------------------------*/
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358 /* configUSE_STATIC_ALLOCATION and configUSE_TIMERS are both set to 1, so the
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359 application must provide an implementation of vApplicationGetTimerTaskMemory()
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360 to provide the memory that is used by the Timer service task. */
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361 void vApplicationGetTimerTaskMemory( StaticTask_t** ppxTimerTaskTCBBuffer, StackType_t** ppxTimerTaskStackBuffer, uint32_t* pulTimerTaskStackSize )
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363 /* If the buffers to be provided to the Timer task are declared inside this
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364 function then they must be declared static - otherwise they will be allocated on
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365 the stack and so not exists after this function exits. */
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366 static StaticTask_t xTimerTaskTCB;
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367 static StackType_t uxTimerTaskStack[configTIMER_TASK_STACK_DEPTH];
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369 /* Pass out a pointer to the StaticTask_t structure in which the Timer
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370 task's state will be stored. */
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371 *ppxTimerTaskTCBBuffer = &xTimerTaskTCB;
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373 /* Pass out the array that will be used as the Timer task's stack. */
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374 *ppxTimerTaskStackBuffer = uxTimerTaskStack;
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376 /* Pass out the size of the array pointed to by *ppxTimerTaskStackBuffer.
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377 Note that, as the array is necessarily of type StackType_t,
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378 configMINIMAL_STACK_SIZE is specified in words, not bytes. */
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379 *pulTimerTaskStackSize = configTIMER_TASK_STACK_DEPTH;
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