git.sur5r.net Git - freertos/blob - FreeRTOS/Demo/CORTEX_A9_Zynq_ZC702/RTOSDemo/src/lwIP_Demo/lwIP_Apps/apps/BasicSocketCommandServer/BasicSocketCommandServer.c

   1 /*\r
   2     FreeRTOS V7.0.2 - Copyright (C) 2011 Real Time Engineers Ltd.\r
   3         \r
   4 \r
   5     ***************************************************************************\r
   6      *                                                                       *\r
   7      *    FreeRTOS tutorial books are available in pdf and paperback.        *\r
   8      *    Complete, revised, and edited pdf reference manuals are also       *\r
   9      *    available.                                                         *\r
  10      *                                                                       *\r
  11      *    Purchasing FreeRTOS documentation will not only help you, by       *\r
  12      *    ensuring you get running as quickly as possible and with an        *\r
  13      *    in-depth knowledge of how to use FreeRTOS, it will also help       *\r
  14      *    the FreeRTOS project to continue with its mission of providing     *\r
  15      *    professional grade, cross platform, de facto standard solutions    *\r
  16      *    for microcontrollers - completely free of charge!                  *\r
  17      *                                                                       *\r
  18      *    >>> See http://www.FreeRTOS.org/Documentation for details. <<<     *\r
  19      *                                                                       *\r
  20      *    Thank you for using FreeRTOS, and thank you for your support!      *\r
  21      *                                                                       *\r
  22     ***************************************************************************\r
  23 \r
  24 \r
  25     This file is part of the FreeRTOS distribution.\r
  26 \r
  27     FreeRTOS is free software; you can redistribute it and/or modify it under\r
  28     the terms of the GNU General Public License (version 2) as published by the\r
  29     Free Software Foundation AND MODIFIED BY the FreeRTOS exception.\r
  30     >>>NOTE<<< The modification to the GPL is included to allow you to\r
  31     distribute a combined work that includes FreeRTOS without being obliged to\r
  32     provide the source code for proprietary components outside of the FreeRTOS\r
  33     kernel.  FreeRTOS is distributed in the hope that it will be useful, but\r
  34     WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY\r
  35     or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for\r
  36     more details. You should have received a copy of the GNU General Public\r
  37     License and the FreeRTOS license exception along with FreeRTOS; if not it\r
  38     can be viewed here: http://www.freertos.org/a00114.html and also obtained\r
  39     by writing to Richard Barry, contact details for whom are available on the\r
  40     FreeRTOS WEB site.\r
  41 \r
  42     1 tab == 4 spaces!\r
  43 \r
  44     http://www.FreeRTOS.org - Documentation, latest information, license and\r
  45     contact details.\r
  46 \r
  47     http://www.SafeRTOS.com - A version that is certified for use in safety\r
  48     critical systems.\r
  49 \r
  50     http://www.OpenRTOS.com - Commercial support, development, porting,\r
  51     licensing and training services.\r
  52 */\r
  53 \r
  54 /* Standard includes. */\r
  55 #include "stdlib.h"\r
  56 #include "string.h"\r
  57 \r
  58 /* lwIP core includes */\r
  59 #include "lwip/opt.h"\r
  60 #include "lwip/sockets.h"\r
  61 \r
  62 /* FreeRTOS includes. */\r
  63 #include "FreeRTOS.h"\r
  64 #include "task.h"\r
  65 \r
  66 /* Utils includes. */\r
  67 #include "FreeRTOS_CLI.h"\r
  68 \r
  69 /* Dimensions the buffer into which input characters are placed. */\r
  70 #define cmdMAX_INPUT_SIZE       20\r
  71 \r
  72 /* Dimensions the buffer into which string outputs can be placed. */\r
  73 #define cmdMAX_OUTPUT_SIZE      1024\r
  74 \r
  75 /*-----------------------------------------------------------*/\r
  76 \r
  77 void vBasicSocketsCommandInterpreterTask( void *pvParameters )\r
  78 {\r
  79 long lSocket, lClientFd, lBytes, lAddrLen = sizeof( struct sockaddr_in ), lInputIndex;\r
  80 struct sockaddr_in sLocalAddr;\r
  81 struct sockaddr_in client_addr;\r
  82 const char *pcWelcomeMessage = "FreeRTOS command server - connection accepted.\r\nType Help to view a list of registered commands.\r\n\r\n>";\r
  83 char cInChar;\r
  84 static char cInputString[ cmdMAX_INPUT_SIZE ], cOutputString[ cmdMAX_OUTPUT_SIZE ];\r
  85 portBASE_TYPE xReturned;\r
  86 \r
  87         ( void ) pvParameters;\r
  88 \r
  89         lSocket = lwip_socket(AF_INET, SOCK_STREAM, 0);\r
  90 \r
  91         if( lSocket >= 0 )\r
  92         {\r
  93                 memset((char *)&sLocalAddr, 0, sizeof(sLocalAddr));\r
  94                 sLocalAddr.sin_family = AF_INET;\r
  95                 sLocalAddr.sin_len = sizeof(sLocalAddr);\r
  96                 sLocalAddr.sin_addr.s_addr = htonl(INADDR_ANY);\r
  97                 sLocalAddr.sin_port = ntohs( ( ( unsigned short ) 23 ) );\r
  98 \r
  99                 if( lwip_bind( lSocket, ( struct sockaddr *) &sLocalAddr, sizeof( sLocalAddr ) ) < 0 ) \r
 100                 {\r
 101                         lwip_close( lSocket );\r
 102                         vTaskDelete( NULL );\r
 103                 }\r
 104 \r
 105                 if( lwip_listen( lSocket, 20 ) != 0 )\r
 106                 {\r
 107                         lwip_close( lSocket );\r
 108                         vTaskDelete( NULL );\r
 109                 }\r
 110 \r
 111                 for( ;; )\r
 112                 {\r
 113 \r
 114                         lClientFd = lwip_accept(lSocket, ( struct sockaddr * ) &client_addr, ( u32_t * ) &lAddrLen );\r
 115 \r
 116                         if( lClientFd > 0L )\r
 117                         {\r
 118                                 lwip_send( lClientFd, pcWelcomeMessage, strlen( ( const char * ) pcWelcomeMessage ), 0 );\r
 119 \r
 120                                 lInputIndex = 0;\r
 121                                 memset( cInputString, 0x00, cmdMAX_INPUT_SIZE );\r
 122 \r
 123                                 do\r
 124                                 {                                       \r
 125                                         lBytes = lwip_recv( lClientFd, &cInChar, sizeof( cInChar ), 0 );\r
 126 \r
 127                                         if( lBytes > 0L ) \r
 128                                         {\r
 129                                                 if( cInChar == '\n' )\r
 130                                                 {\r
 131                                                         /* The input string has been terminated.  Was the \r
 132                                                         input a quit command? */\r
 133                                                         if( strcmp( "quit", ( const char * ) cInputString ) == 0 )\r
 134                                                         {\r
 135                                                                 /* Set lBytes to 0 to close the connection. */\r
 136                                                                 lBytes = 0L;\r
 137                                                         }\r
 138                                                         else\r
 139                                                         {\r
 140                                                                 /* The input string was not a quit command.  \r
 141                                                                 Pass the string to the command interpreter. */\r
 142                                                                 do\r
 143                                                                 {\r
 144                                                                         /* Get the next output string from the command interpreter. */\r
 145                                                                         xReturned = FreeRTOS_CLIProcessCommand( cInputString, cOutputString, configCOMMAND_INT_MAX_OUTPUT_SIZE );\r
 146                                                                         lwip_send( lClientFd, cOutputString, strlen( ( const char * ) cOutputString ), 0 );\r
 147 \r
 148                                                                 } while( xReturned != pdFALSE );\r
 149 \r
 150 \r
 151                                                                 /* All the strings generated by the input \r
 152                                                                 command have been sent.  Clear the input\r
 153                                                                 string ready to receive the next command. */\r
 154                                                                 lInputIndex = 0;\r
 155                                                                 memset( cInputString, 0x00, cmdMAX_INPUT_SIZE );\r
 156                                                                 lwip_send( lClientFd, "\r\n>", strlen( "\r\n>" ), 0 );\r
 157                                                         }\r
 158                                                 }\r
 159                                                 else\r
 160                                                 {\r
 161                                                         if( cInChar == '\r' )\r
 162                                                         {\r
 163                                                                 /* Ignore the character. */\r
 164                                                         }\r
 165                                                         else if( cInChar == '\b' )\r
 166                                                         {\r
 167                                                                 /* Backspace was pressed.  Erase the last \r
 168                                                                 character in the string - if any. */\r
 169                                                                 if( lInputIndex > 0 )\r
 170                                                                 {\r
 171                                                                         lInputIndex--;\r
 172                                                                         cInputString[ lInputIndex ] = '\0';\r
 173                                                                 }\r
 174                                                         }\r
 175                                                         else\r
 176                                                         {\r
 177                                                                 /* A character was entered.  Add it to the string\r
 178                                                                 entered so far.  When a \n is entered the complete\r
 179                                                                 string will be passed to the command interpreter. */\r
 180                                                                 if( lInputIndex < cmdMAX_INPUT_SIZE )\r
 181                                                                 {\r
 182                                                                         cInputString[ lInputIndex ] = cInChar;\r
 183                                                                         lInputIndex++;\r
 184                                                                 }\r
 185                                                         }\r
 186                                                 }\r
 187                                         }\r
 188 \r
 189                                 } while( lBytes > 0L );\r
 190 \r
 191                                  lwip_close( lClientFd );\r
 192                         }\r
 193                 } \r
 194         }\r
 195 \r
 196         /* Will only get here if a listening socket could not be created. */\r
 197         vTaskDelete( NULL );\r
 198 }\r
 199 \r