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 * See https://www.FreeRTOS.org/mqtt/index.html for configuration and usage instructions.
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32 /* Standard includes. */
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36 /* Visual studio intrinsics used so the __debugbreak() function is available
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37 should an assert get hit. */
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40 /* FreeRTOS includes. */
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41 #include <FreeRTOS.h>
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44 /* TCP/IP stack includes. */
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45 #include "FreeRTOS_IP.h"
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46 #include "FreeRTOS_Sockets.h"
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48 /* Demo app includes. */
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49 #include "demo_logging.h"
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52 * Prototypes for the demos that can be started from this project. Note the
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53 * MQTT demo is not actually started until the network is already, which is
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54 * indicated by vApplicationIPNetworkEventHook() executing - hence
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55 * prvStartSimpleMQTTDemo() is called from inside vApplicationIPNetworkEventHook().
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57 extern void vStartSimpleMQTTDemo( void );
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60 * Just seeds the simple pseudo random number generator.
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63 * This is not a secure method of generating random numbers and production
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64 * devices should use a true random number generator (TRNG).
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66 static void prvSRand( UBaseType_t ulSeed );
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69 * Miscellaneous initialisation including preparing the logging and seeding the
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70 * random number generator.
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72 static void prvMiscInitialisation( void );
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74 /* The default IP and MAC address used by the demo. The address configuration
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75 defined here will be used if ipconfigUSE_DHCP is 0, or if ipconfigUSE_DHCP is
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76 1 but a DHCP server could not be contacted. See the online documentation for
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77 more information. */
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78 static const uint8_t ucIPAddress[ 4 ] = { configIP_ADDR0, configIP_ADDR1, configIP_ADDR2, configIP_ADDR3 };
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79 static const uint8_t ucNetMask[ 4 ] = { configNET_MASK0, configNET_MASK1, configNET_MASK2, configNET_MASK3 };
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80 static const uint8_t ucGatewayAddress[ 4 ] = { configGATEWAY_ADDR0, configGATEWAY_ADDR1, configGATEWAY_ADDR2, configGATEWAY_ADDR3 };
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81 static const uint8_t ucDNSServerAddress[ 4 ] = { configDNS_SERVER_ADDR0, configDNS_SERVER_ADDR1, configDNS_SERVER_ADDR2, configDNS_SERVER_ADDR3 };
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83 /* Set the following constant to pdTRUE to log using the method indicated by the
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84 name of the constant, or pdFALSE to not log using the method indicated by the
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85 name of the constant. Options include to standard out (xLogToStdout), to a disk
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86 file (xLogToFile), and to a UDP port (xLogToUDP). If xLogToUDP is set to pdTRUE
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87 then UDP messages are sent to the IP address configured as the echo server
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88 address (see the configECHO_SERVER_ADDR0 definitions in FreeRTOSConfig.h) and
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89 the port number set by configPRINT_PORT in FreeRTOSConfig.h. */
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90 const BaseType_t xLogToStdout = pdTRUE, xLogToFile = pdFALSE, xLogToUDP = pdFALSE;
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92 /* Default MAC address configuration. The demo creates a virtual network
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93 connection that uses this MAC address by accessing the raw Ethernet data
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94 to and from a real network connection on the host PC. See the
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95 configNETWORK_INTERFACE_TO_USE definition for information on how to configure
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96 the real network connection to use. */
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97 const uint8_t ucMACAddress[ 6 ] = { configMAC_ADDR0, configMAC_ADDR1, configMAC_ADDR2, configMAC_ADDR3, configMAC_ADDR4, configMAC_ADDR5 };
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99 /* Use by the pseudo random number generator. */
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100 static UBaseType_t ulNextRand;
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101 /*-----------------------------------------------------------*/
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106 * See https://www.FreeRTOS.org/mqtt/index.html for configuration and usage instructions.
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109 /* Miscellaneous initialisation including preparing the logging and seeding
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110 the random number generator. */
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111 prvMiscInitialisation();
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113 /* Initialise the network interface.
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115 ***NOTE*** Tasks that use the network are created in the network event hook
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116 when the network is connected and ready for use (see the implementation of
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117 vApplicationIPNetworkEventHook() below). The address values passed in here
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118 are used if ipconfigUSE_DHCP is set to 0, or if ipconfigUSE_DHCP is set to 1
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119 but a DHCP server cannot be contacted. */
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120 FreeRTOS_IPInit( ucIPAddress, ucNetMask, ucGatewayAddress, ucDNSServerAddress, ucMACAddress );
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122 /* Start the RTOS scheduler. */
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123 vTaskStartScheduler();
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125 /* If all is well, the scheduler will now be running, and the following
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126 line will never be reached. If the following line does execute, then
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127 there was insufficient FreeRTOS heap memory available for the idle and/or
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128 timer tasks to be created. See the memory management section on the
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129 FreeRTOS web site for more details (this is standard text that is not not
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130 really applicable to the Win32 simulator port). */
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136 /*-----------------------------------------------------------*/
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138 /* Called by FreeRTOS+TCP when the network connects or disconnects. Disconnect
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139 events are only received if implemented in the MAC driver. */
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140 void vApplicationIPNetworkEventHook( eIPCallbackEvent_t eNetworkEvent )
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142 uint32_t ulIPAddress, ulNetMask, ulGatewayAddress, ulDNSServerAddress;
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143 char cBuffer[ 16 ];
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144 static BaseType_t xTasksAlreadyCreated = pdFALSE;
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146 /* If the network has just come up...*/
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147 if( eNetworkEvent == eNetworkUp )
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149 /* Create the tasks that use the IP stack if they have not already been
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151 if( xTasksAlreadyCreated == pdFALSE )
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153 /* Demos that use the nextwork are created after the nextwork is
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155 vStartSimpleMQTTDemo();
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156 xTasksAlreadyCreated = pdTRUE;
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159 /* Print out the network configuration, which may have come from a DHCP
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161 FreeRTOS_GetAddressConfiguration( &ulIPAddress, &ulNetMask, &ulGatewayAddress, &ulDNSServerAddress );
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162 FreeRTOS_inet_ntoa( ulIPAddress, cBuffer );
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163 FreeRTOS_printf( ( "\r\n\r\nIP Address: %s\r\n", cBuffer ) );/*_RB_ Should use IoT libraries logging. */
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165 FreeRTOS_inet_ntoa( ulNetMask, cBuffer );
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166 FreeRTOS_printf( ( "Subnet Mask: %s\r\n", cBuffer ) );
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168 FreeRTOS_inet_ntoa( ulGatewayAddress, cBuffer );
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169 FreeRTOS_printf( ( "Gateway Address: %s\r\n", cBuffer ) );
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171 FreeRTOS_inet_ntoa( ulDNSServerAddress, cBuffer );
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172 FreeRTOS_printf( ( "DNS Server Address: %s\r\n\r\n\r\n", cBuffer ) );
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175 /*-----------------------------------------------------------*/
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177 void vAssertCalled( const char *pcFile, uint32_t ulLine )
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179 volatile uint32_t ulBlockVariable = 0UL;
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180 volatile char *pcFileName = ( volatile char * ) pcFile;
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181 volatile uint32_t ulLineNumber = ulLine;
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183 ( void ) pcFileName;
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184 ( void ) ulLineNumber;
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186 printf( "vAssertCalled( %s, %u\n", pcFile, ulLine );
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188 /* Setting ulBlockVariable to a non-zero value in the debugger will allow
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189 this function to be exited. */
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190 taskDISABLE_INTERRUPTS();
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192 while( ulBlockVariable == 0UL )
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197 taskENABLE_INTERRUPTS();
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199 /*-----------------------------------------------------------*/
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201 UBaseType_t uxRand( void )
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203 const uint32_t ulMultiplier = 0x015a4e35UL, ulIncrement = 1UL;
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206 * Utility function to generate a pseudo random number.
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209 * This is not a secure method of generating a random number. Production
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210 * devices should use a True Random Number Generator (TRNG).
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212 ulNextRand = ( ulMultiplier * ulNextRand ) + ulIncrement;
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213 return( ( int ) ( ulNextRand >> 16UL ) & 0x7fffUL );
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215 /*-----------------------------------------------------------*/
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217 static void prvSRand( UBaseType_t ulSeed )
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219 /* Utility function to seed the pseudo random number generator. */
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220 ulNextRand = ulSeed;
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222 /*-----------------------------------------------------------*/
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224 static void prvMiscInitialisation( void )
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227 uint32_t ulLoggingIPAddress;
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229 ulLoggingIPAddress = FreeRTOS_inet_addr_quick( configECHO_SERVER_ADDR0, configECHO_SERVER_ADDR1, configECHO_SERVER_ADDR2, configECHO_SERVER_ADDR3 );
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230 vLoggingInit( xLogToStdout, xLogToFile, xLogToUDP, ulLoggingIPAddress, configPRINT_PORT );
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233 * Seed random number generator.
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236 * This is not a secure method of generating a random number. Production
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237 * devices should use a True Random Number Generator (TRNG).
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240 FreeRTOS_debug_printf( ( "Seed for randomiser: %lu\n", xTimeNow ) );
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241 prvSRand( ( uint32_t ) xTimeNow );
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242 FreeRTOS_debug_printf( ( "Random numbers: %08X %08X %08X %08X\n", ipconfigRAND32(), ipconfigRAND32(), ipconfigRAND32(), ipconfigRAND32() ) );
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244 /*-----------------------------------------------------------*/
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246 #if( ipconfigUSE_LLMNR != 0 ) || ( ipconfigUSE_NBNS != 0 ) || ( ipconfigDHCP_REGISTER_HOSTNAME == 1 )
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248 const char *pcApplicationHostnameHook( void )
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250 /* Assign the name "FreeRTOS" to this network node. This function will
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251 be called during the DHCP: the machine will be registered with an IP
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252 address plus this name. */
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253 return mainHOST_NAME;
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257 /*-----------------------------------------------------------*/
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259 #if( ipconfigUSE_LLMNR != 0 ) || ( ipconfigUSE_NBNS != 0 )
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261 BaseType_t xApplicationDNSQueryHook( const char *pcName )
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263 BaseType_t xReturn;
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265 /* Determine if a name lookup is for this node. Two names are given
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266 to this node: that returned by pcApplicationHostnameHook() and that set
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267 by mainDEVICE_NICK_NAME. */
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268 if( _stricmp( pcName, pcApplicationHostnameHook() ) == 0 )
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272 else if( _stricmp( pcName, mainDEVICE_NICK_NAME ) == 0 )
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285 /*-----------------------------------------------------------*/
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288 * Callback that provides the inputs necessary to generate a randomized TCP
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289 * Initial Sequence Number per RFC 6528. THIS IS ONLY A DUMMY IMPLEMENTATION
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290 * THAT RETURNS A PSEUDO RANDOM NUMBER SO IS NOT INTENDED FOR USE IN PRODUCTION
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293 extern uint32_t ulApplicationGetNextSequenceNumber( uint32_t ulSourceAddress,
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294 uint16_t usSourcePort,
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295 uint32_t ulDestinationAddress,
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296 uint16_t usDestinationPort )
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298 ( void ) ulSourceAddress;
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299 ( void ) usSourcePort;
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300 ( void ) ulDestinationAddress;
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301 ( void ) usDestinationPort;
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305 /*-----------------------------------------------------------*/
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307 /* configUSE_STATIC_ALLOCATION is set to 1, so the application must provide an
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308 implementation of vApplicationGetIdleTaskMemory() to provide the memory that is
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309 used by the Idle task. */
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310 void vApplicationGetIdleTaskMemory( StaticTask_t** ppxIdleTaskTCBBuffer, StackType_t** ppxIdleTaskStackBuffer, uint32_t* pulIdleTaskStackSize )
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312 /* If the buffers to be provided to the Idle task are declared inside this
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313 function then they must be declared static - otherwise they will be allocated on
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314 the stack and so not exists after this function exits. */
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315 static StaticTask_t xIdleTaskTCB;
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316 static StackType_t uxIdleTaskStack[configMINIMAL_STACK_SIZE];
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318 /* Pass out a pointer to the StaticTask_t structure in which the Idle task's
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319 state will be stored. */
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320 *ppxIdleTaskTCBBuffer = &xIdleTaskTCB;
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322 /* Pass out the array that will be used as the Idle task's stack. */
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323 *ppxIdleTaskStackBuffer = uxIdleTaskStack;
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325 /* Pass out the size of the array pointed to by *ppxIdleTaskStackBuffer.
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326 Note that, as the array is necessarily of type StackType_t,
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327 configMINIMAL_STACK_SIZE is specified in words, not bytes. */
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328 *pulIdleTaskStackSize = configMINIMAL_STACK_SIZE;
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330 /*-----------------------------------------------------------*/
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332 /* configUSE_STATIC_ALLOCATION and configUSE_TIMERS are both set to 1, so the
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333 application must provide an implementation of vApplicationGetTimerTaskMemory()
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334 to provide the memory that is used by the Timer service task. */
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335 void vApplicationGetTimerTaskMemory( StaticTask_t** ppxTimerTaskTCBBuffer, StackType_t** ppxTimerTaskStackBuffer, uint32_t* pulTimerTaskStackSize )
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337 /* If the buffers to be provided to the Timer task are declared inside this
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338 function then they must be declared static - otherwise they will be allocated on
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339 the stack and so not exists after this function exits. */
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340 static StaticTask_t xTimerTaskTCB;
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341 static StackType_t uxTimerTaskStack[configTIMER_TASK_STACK_DEPTH];
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343 /* Pass out a pointer to the StaticTask_t structure in which the Timer
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344 task's state will be stored. */
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345 *ppxTimerTaskTCBBuffer = &xTimerTaskTCB;
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347 /* Pass out the array that will be used as the Timer task's stack. */
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348 *ppxTimerTaskStackBuffer = uxTimerTaskStack;
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350 /* Pass out the size of the array pointed to by *ppxTimerTaskStackBuffer.
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351 Note that, as the array is necessarily of type StackType_t,
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352 configMINIMAL_STACK_SIZE is specified in words, not bytes. */
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353 *pulTimerTaskStackSize = configTIMER_TASK_STACK_DEPTH;
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355 /*-----------------------------------------------------------*/
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