begriffs open source - freertos/blob - Demo/WIN32-MSVC-lwIP/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 \r
  57 /* lwIP core includes */\r
  58 #include "lwip/opt.h"\r
  59 #include "lwip/sockets.h"\r
  60 \r
  61 /* FreeRTOS includes. */\r
  62 #include "FreeRTOS.h"\r
  63 #include "task.h"\r
  64 \r
  65 /* Utils includes. */\r
  66 #include "CommandInterpreter.h"\r
  67 \r
  68 /* Dimensions the buffer into which input characters are placed. */\r
  69 #define cmdMAX_INPUT_SIZE       20\r
  70 \r
  71 /* Dimensions the buffer into which string outputs can be placed. */\r
  72 #define cmdMAX_OUTPUT_SIZE      1024\r
  73 \r
  74 /*-----------------------------------------------------------*/\r
  75 \r
  76 void vBasicSocketsCommandInterpreterTask( void *pvParameters )\r
  77 {\r
  78 long lSocket, lClientFd, lBytes, lAddrLen = sizeof( struct sockaddr_in );\r
  79 struct sockaddr_in sLocalAddr;\r
  80 struct sockaddr_in client_addr;\r
  81 const signed char *pcWelcomeMessage = "FreeRTOS command server - connection accepted.\r\nType Help to view a list of registered commands.\r\n\r\n>";\r
  82 signed char cInChar, cInputIndex;\r
  83 static signed char cInputString[ cmdMAX_INPUT_SIZE ], cOutputString[ cmdMAX_OUTPUT_SIZE ];\r
  84 portBASE_TYPE xReturned;\r
  85 \r
  86         ( void ) pvParameters;\r
  87 \r
  88         lSocket = lwip_socket(AF_INET, SOCK_STREAM, 0);\r
  89 \r
  90         if( lSocket >= 0 )\r
  91         {\r
  92                 memset((char *)&sLocalAddr, 0, sizeof(sLocalAddr));\r
  93                 sLocalAddr.sin_family = AF_INET;\r
  94                 sLocalAddr.sin_len = sizeof(sLocalAddr);\r
  95                 sLocalAddr.sin_addr.s_addr = htonl(INADDR_ANY);\r
  96                 sLocalAddr.sin_port = ntohs( ( ( unsigned short ) 23 ) );\r
  97 \r
  98                 if( lwip_bind( lSocket, ( struct sockaddr *) &sLocalAddr, sizeof( sLocalAddr ) ) < 0 ) \r
  99                 {\r
 100                         lwip_close( lSocket );\r
 101                         vTaskDelete( NULL );\r
 102                 }\r
 103 \r
 104                 if( lwip_listen( lSocket, 20 ) != 0 )\r
 105                 {\r
 106                         lwip_close( lSocket );\r
 107                         vTaskDelete( NULL );\r
 108                 }\r
 109 \r
 110                 for( ;; )\r
 111                 {\r
 112 \r
 113                         lClientFd = lwip_accept(lSocket, ( struct sockaddr * ) &client_addr, ( u32_t * ) &lAddrLen );\r
 114 \r
 115                         if( lClientFd > 0L )\r
 116                         {\r
 117                                 lwip_send( lClientFd, pcWelcomeMessage, strlen( ( const char * ) pcWelcomeMessage ), 0 );\r
 118 \r
 119                                 cInputIndex = 0;\r
 120                                 memset( cInputString, 0x00, cmdMAX_INPUT_SIZE );\r
 121 \r
 122                                 do\r
 123                                 {                                       \r
 124                                         lBytes = lwip_recv( lClientFd, &cInChar, sizeof( cInChar ), 0 );\r
 125 \r
 126                                         if( lBytes > 0L ) \r
 127                                         {\r
 128                                                 if( cInChar == '\n' )\r
 129                                                 {\r
 130                                                         /* The input string has been terminated.  Was the \r
 131                                                         input a quit command? */\r
 132                                                         if( strcmp( "quit", ( const char * ) cInputString ) == 0 )\r
 133                                                         {\r
 134                                                                 /* Set lBytes to 0 to close the connection. */\r
 135                                                                 lBytes = 0L;\r
 136                                                         }\r
 137                                                         else\r
 138                                                         {\r
 139                                                                 /* The input string was not a quit command.  \r
 140                                                                 Pass the string to the command interpreter. */\r
 141                                                                 do\r
 142                                                                 {\r
 143                                                                         xReturned = xCmdIntProcessCommand( cInputString, cOutputString, cmdMAX_OUTPUT_SIZE );\r
 144                                                                         lwip_send( lClientFd, cOutputString, strlen( ( const char * ) cOutputString ), 0 );\r
 145 \r
 146                                                                 } while( xReturned != pdFALSE );\r
 147 \r
 148                                                                 /* All the strings generated by the input \r
 149                                                                 command have been sent.  Clear the input\r
 150                                                                 string ready to receive the next command. */\r
 151                                                                 cInputIndex = 0;\r
 152                                                                 memset( cInputString, 0x00, cmdMAX_INPUT_SIZE );\r
 153                                                                 lwip_send( lClientFd, "\r\n>", strlen( "\r\n>" ), 0 );\r
 154                                                         }\r
 155                                                 }\r
 156                                                 else\r
 157                                                 {\r
 158                                                         if( cInChar == '\r' )\r
 159                                                         {\r
 160                                                                 /* Ignore the character. */\r
 161                                                         }\r
 162                                                         else if( cInChar == '\b' )\r
 163                                                         {\r
 164                                                                 /* Backspace was pressed.  Erase the last \r
 165                                                                 character in the string - if any. */\r
 166                                                                 if( cInputIndex > 0 )\r
 167                                                                 {\r
 168                                                                         cInputIndex--;\r
 169                                                                         cInputString[ cInputIndex ] = '\0';\r
 170                                                                 }\r
 171                                                         }\r
 172                                                         else\r
 173                                                         {\r
 174                                                                 /* A character was entered.  Add it to the string\r
 175                                                                 entered so far.  When a \n is entered the complete\r
 176                                                                 string will be passed to the command interpreter. */\r
 177                                                                 if( cInputIndex < cmdMAX_INPUT_SIZE )\r
 178                                                                 {\r
 179                                                                         cInputString[ cInputIndex ] = cInChar;\r
 180                                                                         cInputIndex++;\r
 181                                                                 }\r
 182                                                         }\r
 183                                                 }\r
 184                                         }\r
 185 \r
 186                                 } while( lBytes > 0L );\r
 187 \r
 188                                  lwip_close( lClientFd );\r
 189                         }\r
 190                 } \r
 191         }\r
 192 \r
 193         /* Will only get here if a listening socket could not be created. */\r
 194         vTaskDelete( NULL );\r
 195 }\r
 196 \r