FreeRTOS/Demo/WIN32-MSVC-lwIP/lwIP_Apps/apps/BasicSocketCommandServer/BasicSocketCommandServer.c - third_party/github/FreeRTOS/FreeRTOS-Kernel - Git at Google

 /*
     FreeRTOS V7.4.0 - Copyright (C) 2013 Real Time Engineers Ltd.

     FEATURES AND PORTS ARE ADDED TO FREERTOS ALL THE TIME.  PLEASE VISIT
     http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.

     ***************************************************************************
      *                                                                       *
      *    FreeRTOS tutorial books are available in pdf and paperback.        *
      *    Complete, revised, and edited pdf reference manuals are also       *
      *    available.                                                         *
      *                                                                       *
      *    Purchasing FreeRTOS documentation will not only help you, by       *
      *    ensuring you get running as quickly as possible and with an        *
      *    in-depth knowledge of how to use FreeRTOS, it will also help       *
      *    the FreeRTOS project to continue with its mission of providing     *
      *    professional grade, cross platform, de facto standard solutions    *
      *    for microcontrollers - completely free of charge!                  *
      *                                                                       *
      *    >>> See http://www.FreeRTOS.org/Documentation for details. <<<     *
      *                                                                       *
      *    Thank you for using FreeRTOS, and thank you for your support!      *
      *                                                                       *
     ***************************************************************************


     This file is part of the FreeRTOS distribution.

     FreeRTOS is free software; you can redistribute it and/or modify it under
     the terms of the GNU General Public License (version 2) as published by the
     Free Software Foundation AND MODIFIED BY the FreeRTOS exception.

     >>>>>>NOTE<<<<<< The modification to the GPL is included to allow you to
     distribute a combined work that includes FreeRTOS without being obliged to
     provide the source code for proprietary components outside of the FreeRTOS
     kernel.

     FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
     WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
     FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
     details. You should have received a copy of the GNU General Public License
     and the FreeRTOS license exception along with FreeRTOS; if not itcan be
     viewed here: http://www.freertos.org/a00114.html and also obtained by
     writing to Real Time Engineers Ltd., contact details for whom are available
     on the FreeRTOS WEB site.

     1 tab == 4 spaces!

     ***************************************************************************
      *                                                                       *
      *    Having a problem?  Start by reading the FAQ "My application does   *
      *    not run, what could be wrong?"                                     *
      *                                                                       *
      *    http://www.FreeRTOS.org/FAQHelp.html                               *
      *                                                                       *
     ***************************************************************************


     http://www.FreeRTOS.org - Documentation, books, training, latest versions,
     license and Real Time Engineers Ltd. contact details.

     http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
     including FreeRTOS+Trace - an indispensable productivity tool, and our new
     fully thread aware and reentrant UDP/IP stack.

     http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High
     Integrity Systems, who sell the code with commercial support,
     indemnification and middleware, under the OpenRTOS brand.

     http://www.SafeRTOS.com - High Integrity Systems also provide a safety
     engineered and independently SIL3 certified version for use in safety and
     mission critical applications that require provable dependability.
 */

 /* Standard includes. */
 #include "stdlib.h"

 /* lwIP core includes */
 #include "lwip/opt.h"
 #include "lwip/sockets.h"

 /* FreeRTOS includes. */
 #include "FreeRTOS.h"
 #include "task.h"

 /* Utils includes. */
 #include "CommandInterpreter.h"

 /* Dimensions the buffer into which input characters are placed. */
 #define cmdMAX_INPUT_SIZE	20

 /* Dimensions the buffer into which string outputs can be placed. */
 #define cmdMAX_OUTPUT_SIZE	1024

 /*-----------------------------------------------------------*/

 void vBasicSocketsCommandInterpreterTask( void *pvParameters )
 {
 long lSocket, lClientFd, lBytes, lAddrLen = sizeof( struct sockaddr_in );
 struct sockaddr_in sLocalAddr;
 struct sockaddr_in client_addr;
 const signed char *pcWelcomeMessage = "FreeRTOS command server - connection accepted.\r\nType Help to view a list of registered commands.\r\n\r\n>";
 signed char cInChar, cInputIndex;
 static signed char cInputString[ cmdMAX_INPUT_SIZE ], cOutputString[ cmdMAX_OUTPUT_SIZE ];
 portBASE_TYPE xReturned;

 	( void ) pvParameters;

 	lSocket = lwip_socket(AF_INET, SOCK_STREAM, 0);

 	if( lSocket >= 0 )
 	{
 		memset((char *)&sLocalAddr, 0, sizeof(sLocalAddr));
 		sLocalAddr.sin_family = AF_INET;
 		sLocalAddr.sin_len = sizeof(sLocalAddr);
 		sLocalAddr.sin_addr.s_addr = htonl(INADDR_ANY);
 		sLocalAddr.sin_port = ntohs( ( ( unsigned short ) 23 ) );

 		if( lwip_bind( lSocket, ( struct sockaddr *) &sLocalAddr, sizeof( sLocalAddr ) ) < 0 )
 		{
 			lwip_close( lSocket );
 			vTaskDelete( NULL );
 		}

 		if( lwip_listen( lSocket, 20 ) != 0 )
 		{
 			lwip_close( lSocket );
 			vTaskDelete( NULL );
 		}

 		for( ;; )
 		{

 			lClientFd = lwip_accept(lSocket, ( struct sockaddr * ) &client_addr, ( u32_t * ) &lAddrLen );

 			if( lClientFd > 0L )
 			{
 				lwip_send( lClientFd, pcWelcomeMessage, strlen( ( const char * ) pcWelcomeMessage ), 0 );

 				cInputIndex = 0;
 				memset( cInputString, 0x00, cmdMAX_INPUT_SIZE );

 				do
 				{
 					lBytes = lwip_recv( lClientFd, &cInChar, sizeof( cInChar ), 0 );

 					if( lBytes > 0L )
 					{
 						if( cInChar == '\n' )
 						{
 							/* The input string has been terminated.  Was the
 							input a quit command? */
 							if( strcmp( "quit", ( const char * ) cInputString ) == 0 )
 							{
 								/* Set lBytes to 0 to close the connection. */
 								lBytes = 0L;
 							}
 							else
 							{
 								/* The input string was not a quit command.
 								Pass the string to the command interpreter. */
 								do
 								{
 									xReturned = xCmdIntProcessCommand( cInputString, cOutputString, cmdMAX_OUTPUT_SIZE );
 									lwip_send( lClientFd, cOutputString, strlen( ( const char * ) cOutputString ), 0 );

 								} while( xReturned != pdFALSE );

 								/* All the strings generated by the input
 								command have been sent.  Clear the input
 								string ready to receive the next command. */
 								cInputIndex = 0;
 								memset( cInputString, 0x00, cmdMAX_INPUT_SIZE );
 								lwip_send( lClientFd, "\r\n>", strlen( "\r\n>" ), 0 );
 							}
 						}
 						else
 						{
 							if( cInChar == '\r' )
 							{
 								/* Ignore the character. */
 							}
 							else if( cInChar == '\b' )
 							{
 								/* Backspace was pressed.  Erase the last
 								character in the string - if any. */
 								if( cInputIndex > 0 )
 								{
 									cInputIndex--;
 									cInputString[ cInputIndex ] = '\0';
 								}
 							}
 							else
 							{
 								/* A character was entered.  Add it to the string
 								entered so far.  When a \n is entered the complete
 								string will be passed to the command interpreter. */
 								if( cInputIndex < cmdMAX_INPUT_SIZE )
 								{
 									cInputString[ cInputIndex ] = cInChar;
 									cInputIndex++;
 								}
 							}
 						}
 					}

 				} while( lBytes > 0L );

 				 lwip_close( lClientFd );
 			}
 		}
 	}

 	/* Will only get here if a listening socket could not be created. */
 	vTaskDelete( NULL );
 }
	/*
	FreeRTOS V7.4.0 - Copyright (C) 2013 Real Time Engineers Ltd.

	FEATURES AND PORTS ARE ADDED TO FREERTOS ALL THE TIME. PLEASE VISIT
	http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.

	***************************************************************************
	* *
	* FreeRTOS tutorial books are available in pdf and paperback. *
	* Complete, revised, and edited pdf reference manuals are also *
	* available. *
	* *
	* Purchasing FreeRTOS documentation will not only help you, by *
	* ensuring you get running as quickly as possible and with an *
	* in-depth knowledge of how to use FreeRTOS, it will also help *
	* the FreeRTOS project to continue with its mission of providing *
	* professional grade, cross platform, de facto standard solutions *
	* for microcontrollers - completely free of charge! *
	* *
	* >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
	* *
	* Thank you for using FreeRTOS, and thank you for your support! *
	* *
	***************************************************************************


	This file is part of the FreeRTOS distribution.

	FreeRTOS is free software; you can redistribute it and/or modify it under
	the terms of the GNU General Public License (version 2) as published by the
	Free Software Foundation AND MODIFIED BY the FreeRTOS exception.

	>>>>>>NOTE<<<<<< The modification to the GPL is included to allow you to
	distribute a combined work that includes FreeRTOS without being obliged to
	provide the source code for proprietary components outside of the FreeRTOS
	kernel.

	FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
	WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
	FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
	details. You should have received a copy of the GNU General Public License
	and the FreeRTOS license exception along with FreeRTOS; if not itcan be
	viewed here: http://www.freertos.org/a00114.html and also obtained by
	writing to Real Time Engineers Ltd., contact details for whom are available
	on the FreeRTOS WEB site.

	1 tab == 4 spaces!

	***************************************************************************
	* *
	* Having a problem? Start by reading the FAQ "My application does *
	* not run, what could be wrong?" *
	* *
	* http://www.FreeRTOS.org/FAQHelp.html *
	* *
	***************************************************************************


	http://www.FreeRTOS.org - Documentation, books, training, latest versions,
	license and Real Time Engineers Ltd. contact details.

	http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
	including FreeRTOS+Trace - an indispensable productivity tool, and our new
	fully thread aware and reentrant UDP/IP stack.

	http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High
	Integrity Systems, who sell the code with commercial support,
	indemnification and middleware, under the OpenRTOS brand.

	http://www.SafeRTOS.com - High Integrity Systems also provide a safety
	engineered and independently SIL3 certified version for use in safety and
	mission critical applications that require provable dependability.
	*/

	/* Standard includes. */
	#include "stdlib.h"

	/* lwIP core includes */
	#include "lwip/opt.h"
	#include "lwip/sockets.h"

	/* FreeRTOS includes. */
	#include "FreeRTOS.h"
	#include "task.h"

	/* Utils includes. */
	#include "CommandInterpreter.h"

	/* Dimensions the buffer into which input characters are placed. */
	#define cmdMAX_INPUT_SIZE 20

	/* Dimensions the buffer into which string outputs can be placed. */
	#define cmdMAX_OUTPUT_SIZE 1024

	/-----------------------------------------------------------/

	void vBasicSocketsCommandInterpreterTask( void *pvParameters )
	{
	long lSocket, lClientFd, lBytes, lAddrLen = sizeof( struct sockaddr_in );
	struct sockaddr_in sLocalAddr;
	struct sockaddr_in client_addr;
	const signed char *pcWelcomeMessage = "FreeRTOS command server - connection accepted.\r\nType Help to view a list of registered commands.\r\n\r\n>";
	signed char cInChar, cInputIndex;
	static signed char cInputString[ cmdMAX_INPUT_SIZE ], cOutputString[ cmdMAX_OUTPUT_SIZE ];
	portBASE_TYPE xReturned;

	( void ) pvParameters;

	lSocket = lwip_socket(AF_INET, SOCK_STREAM, 0);

	if( lSocket >= 0 )
	{
	memset((char *)&sLocalAddr, 0, sizeof(sLocalAddr));
	sLocalAddr.sin_family = AF_INET;
	sLocalAddr.sin_len = sizeof(sLocalAddr);
	sLocalAddr.sin_addr.s_addr = htonl(INADDR_ANY);
	sLocalAddr.sin_port = ntohs( ( ( unsigned short ) 23 ) );

	if( lwip_bind( lSocket, ( struct sockaddr *) &sLocalAddr, sizeof( sLocalAddr ) ) < 0 )
	{
	lwip_close( lSocket );
	vTaskDelete( NULL );
	}

	if( lwip_listen( lSocket, 20 ) != 0 )
	{
	lwip_close( lSocket );
	vTaskDelete( NULL );
	}

	for( ;; )
	{

	lClientFd = lwip_accept(lSocket, ( struct sockaddr * ) &client_addr, ( u32_t * ) &lAddrLen );

	if( lClientFd > 0L )
	{
	lwip_send( lClientFd, pcWelcomeMessage, strlen( ( const char * ) pcWelcomeMessage ), 0 );

	cInputIndex = 0;
	memset( cInputString, 0x00, cmdMAX_INPUT_SIZE );

	do
	{
	lBytes = lwip_recv( lClientFd, &cInChar, sizeof( cInChar ), 0 );

	if( lBytes > 0L )
	{
	if( cInChar == '\n' )
	{
	/* The input string has been terminated. Was the
	input a quit command? */
	if( strcmp( "quit", ( const char * ) cInputString ) == 0 )
	{
	/* Set lBytes to 0 to close the connection. */
	lBytes = 0L;
	}
	else
	{
	/* The input string was not a quit command.
	Pass the string to the command interpreter. */
	do
	{
	xReturned = xCmdIntProcessCommand( cInputString, cOutputString, cmdMAX_OUTPUT_SIZE );
	lwip_send( lClientFd, cOutputString, strlen( ( const char * ) cOutputString ), 0 );

	} while( xReturned != pdFALSE );

	/* All the strings generated by the input
	command have been sent. Clear the input
	string ready to receive the next command. */
	cInputIndex = 0;
	memset( cInputString, 0x00, cmdMAX_INPUT_SIZE );
	lwip_send( lClientFd, "\r\n>", strlen( "\r\n>" ), 0 );
	}
	}
	else
	{
	if( cInChar == '\r' )
	{
	/* Ignore the character. */
	}
	else if( cInChar == '\b' )
	{
	/* Backspace was pressed. Erase the last
	character in the string - if any. */
	if( cInputIndex > 0 )
	{
	cInputIndex--;
	cInputString[ cInputIndex ] = '\0';
	}
	}
	else
	{
	/* A character was entered. Add it to the string
	entered so far. When a \n is entered the complete
	string will be passed to the command interpreter. */
	if( cInputIndex < cmdMAX_INPUT_SIZE )
	{
	cInputString[ cInputIndex ] = cInChar;
	cInputIndex++;
	}
	}
	}
	}

	} while( lBytes > 0L );

	lwip_close( lClientFd );
	}
	}
	}

	/* Will only get here if a listening socket could not be created. */
	vTaskDelete( NULL );
	}