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Add TCP zero copy example to the TCP echo client demo - IPv6 WinSim (#1138)

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* Add TCP zero copy example to the TCP echo client demo - IPv6 WinSim

* Uncrustify: triggered by comment.

* Uncrustify: triggered by comment

* Uncrustify fix formatting

---------

Co-authored-by: GitHub Action <action@github.com>
Co-authored-by: Rahul Kar <118818625+kar-rahul-aws@users.noreply.github.com>
Co-authored-by: Gaurav-Aggarwal-AWS <33462878+aggarg@users.noreply.github.com>
pull/1154/head^2
Tony Josi 1 year ago committed by GitHub
parent 0b5cd08665
commit 5c374f1a6e
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 88 additions and 18 deletions
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106
FreeRTOS-Plus/Demo/FreeRTOS_Plus_TCP_IPv6_Demo/IPv6_Multi_WinSim_demo/TCPEchoClient_SingleTasks.c
Unescape Escape View File

@ -70,6 +70,9 @@
/* The number of instances of the echo client task to create. */
#define echoNUM_ECHO_CLIENTS ( 1 )
/* To enable the use of zero copy interface of the TCP sockets */
#define USE_TCP_ZERO_COPY ( 0 )
/*-----------------------------------------------------------*/
/*
@ -151,6 +154,68 @@
return xReturn;
}
/*-----------------------------------------------------------*/
static BaseType_t vTCPCreateAndSendData( Socket_t xSocket,
char * pcTransmitBuffer,
volatile uint32_t * pulTxCount,
uint32_t ulBufferLength )
{
BaseType_t lStringLength;
BaseType_t lTransmitted;
char * pcDstBuffer;
#if USE_TCP_ZERO_COPY
BaseType_t xStreamBufferLength;
char * pcBuffer;
#endif /* USE_TCP_ZERO_COPY */
pcDstBuffer = pcTransmitBuffer;
#if USE_TCP_ZERO_COPY
/* Get a direct pointer to the TX head of the circular transmit buffer */
pcBuffer = ( char * ) FreeRTOS_get_tx_head( xSocket, &xStreamBufferLength );
/* Check if sufficient space is there in the stream buffer. If there
* isn't enough size use application provided buffer */
if( xStreamBufferLength >= ulBufferLength )
{
/* Use the TCP stream buffer to directly create the TX data */
pcDstBuffer = pcBuffer;
}
#endif /* USE_TCP_ZERO_COPY */
lStringLength = prvCreateTxData( pcDstBuffer, ulBufferLength );
/* Add in some unique text at the front of the string. */
sprintf( pcDstBuffer, "TxRx message number %u", ( unsigned ) *pulTxCount );
( *pulTxCount )++;
#if USE_TCP_ZERO_COPY
/* Check to see if zero copy is used */
if( pcDstBuffer != pcTransmitBuffer )
{
/* Save a copy of the data in pcTransmitBuffer
* which can be used to verify the echoed back data */
memcpy( pcTransmitBuffer, pcDstBuffer, lStringLength );
/* Set the buffer pointer as NULL to let the stack know
* that its a zero copy */
pcDstBuffer = NULL;
}
#endif /* USE_TCP_ZERO_COPY */
/* Send the string to the socket. */
lTransmitted = FreeRTOS_send( xSocket, /* The socket being sent to. */
( void * ) pcDstBuffer, /* The data being sent. */
lStringLength, /* The length of the data being sent. */
0 ); /* No flags. */
configPRINTF( ( "FreeRTOS_send: %u/%u\n", ( unsigned ) lTransmitted, ( unsigned ) lStringLength ) );
return lTransmitted;
}
/*-----------------------------------------------------------*/
static void prvEchoClientTask( void * pvParameters )
@ -161,7 +226,7 @@
const int32_t lMaxLoopCount = 1;
volatile uint32_t ulTxCount = 0UL;
BaseType_t xReceivedBytes, xReturned = 0, xInstance;
BaseType_t lTransmitted, lStringLength;
BaseType_t lTransmitted;
char * pcTransmittedString, * pcReceivedString;
WinProperties_t xWinProps;
TickType_t xTimeOnEntering;
@ -252,19 +317,7 @@
/* Send a number of echo requests. */
for( lLoopCount = 0; lLoopCount < lMaxLoopCount; lLoopCount++ )
{
/* Create the string that is sent to the echo server. */
lStringLength = prvCreateTxData( pcTransmittedString, echoBUFFER_SIZES );
/* Add in some unique text at the front of the string. */
sprintf( pcTransmittedString, "TxRx message number %u", ( unsigned ) ulTxCount );
ulTxCount++;
/* Send the string to the socket. */
lTransmitted = FreeRTOS_send( xSocket, /* The socket being sent to. */
( void * ) pcTransmittedString, /* The data being sent. */
lStringLength, /* The length of the data being sent. */
0 ); /* No flags. */
configPRINTF( ( "FreeRTOS_send: %u/%u\n", ( unsigned ) lTransmitted, ( unsigned ) lStringLength ) );
lTransmitted = vTCPCreateAndSendData( xSocket, pcTransmittedString, &ulTxCount, echoBUFFER_SIZES );
if( xIsFatalError( lTransmitted ) )
{
@ -282,10 +335,27 @@
/* Receive data echoed back to the socket. */
while( xReceivedBytes < lTransmitted )
{
xReturned = FreeRTOS_recv( xSocket, /* The socket being received from. */
&( pcReceivedString[ xReceivedBytes ] ), /* The buffer into which the received data will be written. */
lStringLength - xReceivedBytes, /* The size of the buffer provided to receive the data. */
0 ); /* No flags. */
#if USE_TCP_ZERO_COPY
uint8_t * pucZeroCopyRxBuffPtr = NULL;
xReturned = FreeRTOS_recv( xSocket, /* The socket being received from. */
&pucZeroCopyRxBuffPtr, /* While using FREERTOS_ZERO_COPY flag, pvBuffer is taken as a double pointer which will be updated with pointer to TCP RX stream buffer. */
ipconfigTCP_MSS, /* The size of the buffer provided to receive the data. */
FREERTOS_ZERO_COPY ); /* Use FREERTOS_ZERO_COPY flag to enable zero copy. */
if( pucZeroCopyRxBuffPtr != NULL )
{
memcpy( &( pcReceivedString[ xReceivedBytes ] ), pucZeroCopyRxBuffPtr, xReturned );
/* Release the memory that was previously obtained by calling FreeRTOS_recv()
* with the flag 'FREERTOS_ZERO_COPY' */
FreeRTOS_ReleaseTCPPayloadBuffer( xSocket, pucZeroCopyRxBuffPtr, xReturned );
}
#else /* if USE_TCP_ZERO_COPY */
xReturned = FreeRTOS_recv( xSocket, /* The socket being received from. */
&( pcReceivedString[ xReceivedBytes ] ), /* The buffer into which the received data will be written. */
lTransmitted - xReceivedBytes, /* The size of the buffer provided to receive the data. */
0 ); /* No flags. */
#endif /* USE_TCP_ZERO_COPY */
if( xIsFatalError( xReturned ) )
{

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