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Add ND Timer event implementation
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@HTRamsey
HTRamsey committed Aug 1, 2024
1 parent c43498d commit 4772f1c
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Showing 13 changed files with 435 additions and 152 deletions.
133 changes: 99 additions & 34 deletions source/FreeRTOS_IP.c
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Original file line number Diff line number Diff line change
Expand Up @@ -64,34 +64,50 @@
#ifndef ipINITIALISATION_RETRY_DELAY
#define ipINITIALISATION_RETRY_DELAY ( pdMS_TO_TICKS( 3000U ) )
#endif

#if ( ipconfigUSE_TCP_MEM_STATS != 0 )
#include "tcp_mem_stats.h"
#endif

/** @brief Maximum time to wait for a resolution while holding a packet. */
#ifndef ipADDR_RES_MAX_DELAY
#define ipADDR_RES_MAX_DELAY ( pdMS_TO_TICKS( 2000U ) )
/** @brief Maximum time to wait for an ARP resolution while holding a packet. */
#ifndef ipARP_RESOLUTION_MAX_DELAY
#define ipARP_RESOLUTION_MAX_DELAY ( pdMS_TO_TICKS( 2000U ) )
#endif

#ifndef iptraceIP_TASK_STARTING
#define iptraceIP_TASK_STARTING() do {} while( ipFALSE_BOOL ) /**< Empty definition in case iptraceIP_TASK_STARTING is not defined. */
/** @brief Maximum time to wait for a ND resolution while holding a packet. */
#ifndef ipND_RESOLUTION_MAX_DELAY
#define ipND_RESOLUTION_MAX_DELAY ( pdMS_TO_TICKS( 2000U ) )
#endif

#if ( ( ipconfigUSE_TCP == 1 ) && !defined( ipTCP_TIMER_PERIOD_MS ) )
/** @brief When initialising the TCP timer, give it an initial time-out of 1 second. */
#define ipTCP_TIMER_PERIOD_MS ( 1000U )
/** @brief Defines how often the ARP resolution timer callback function is executed. The time is
* shorter in the Windows simulator as simulated time is not real time. */
#ifndef ipARP_TIMER_PERIOD_MS
#ifdef _WINDOWS_
#define ipARP_TIMER_PERIOD_MS ( 500U ) /* For windows simulator builds. */
#else
#define ipARP_TIMER_PERIOD_MS ( 10000U )
#endif
#endif

/** @brief Defines how often the resolution timer callback function is executed. The time is
/** @brief Defines how often the ND resolution timer callback function is executed. The time is
* shorter in the Windows simulator as simulated time is not real time. */
#ifndef ipADDR_RES_TIMER_PERIOD_MS
#ifndef ipND_TIMER_PERIOD_MS
#ifdef _WINDOWS_
#define ipADDR_RES_TIMER_PERIOD_MS ( 500U ) /* For windows simulator builds. */
#define ipND_TIMER_PERIOD_MS ( 500U ) /* For windows simulator builds. */
#else
#define ipADDR_RES_TIMER_PERIOD_MS ( 10000U )
#define ipND_TIMER_PERIOD_MS ( 10000U )
#endif
#endif

#if ( ( ipconfigUSE_TCP == 1 ) && !defined( ipTCP_TIMER_PERIOD_MS ) )
/** @brief When initialising the TCP timer, give it an initial time-out of 1 second. */
#define ipTCP_TIMER_PERIOD_MS ( 1000U )
#endif

#ifndef iptraceIP_TASK_STARTING
#define iptraceIP_TASK_STARTING() do {} while( ipFALSE_BOOL ) /**< Empty definition in case iptraceIP_TASK_STARTING is not defined. */
#endif

/** @brief The frame type field in the Ethernet header must have a value greater than 0x0600.
* If the configuration option ipconfigFILTER_OUT_NON_ETHERNET_II_FRAMES is enabled, the stack
* will discard packets with a frame type value less than or equal to 0x0600.
Expand All @@ -106,8 +122,15 @@ static void prvIPTask_CheckPendingEvents( void );

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

/** @brief The pointer to buffer with packet waiting for resolution. */
NetworkBufferDescriptor_t * pxResolutionWaitingNetworkBuffer = NULL;
/** @brief The pointer to buffer with packet waiting for ARP resolution. */
#if ipconfigIS_ENABLED( ipconfigUSE_IPv4 )
NetworkBufferDescriptor_t * pxARPWaitingNetworkBuffer = NULL;
#endif

/** @brief The pointer to buffer with packet waiting for ND resolution. */
#if ipconfigIS_ENABLED( ipconfigUSE_IPv6 )
NetworkBufferDescriptor_t * pxNDWaitingNetworkBuffer = NULL;
#endif

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

Expand Down Expand Up @@ -293,16 +316,18 @@ static void prvProcessIPEventsAndTimers( void )
prvForwardTxPacket( ( ( NetworkBufferDescriptor_t * ) xReceivedEvent.pvData ), pdTRUE );
break;

case eResolutionTimerEvent:
/* The Resolution timer has expired, process the cache. */
#if ( ipconfigUSE_IPv4 != 0 )
case eARPTimerEvent:
/* The ARP Resolution timer has expired, process the cache. */
#if ipconfigIS_ENABLED( ipconfigUSE_IPv4 )
vARPAgeCache();
#endif /* ( ipconfigUSE_IPv4 != 0 ) */
break;

#if ( ipconfigUSE_IPv6 != 0 )
case eNDTimerEvent:
/* The ND Resolution timer has expired, process the cache. */
#if ipconfigIS_ENABLED( ipconfigUSE_IPv6 )
vNDAgeCache();
#endif /* ( ipconfigUSE_IPv6 != 0 ) */

break;

case eSocketBindEvent:
Expand Down Expand Up @@ -493,8 +518,15 @@ static void prvIPTask_Initialise( void )
}
#endif

/* Mark the timer as inactive since we are not waiting on any resolution as of now. */
vIPSetResolutionTimerEnableState( pdFALSE );
#if ipconfigIS_ENABLED( ipconfigUSE_IPv4 )
/* Mark the ARP timer as inactive since we are not waiting on any resolution as of now. */
vIPSetARPResolutionTimerEnableState( pdFALSE );
#endif

#if ipconfigIS_ENABLED( ipconfigUSE_IPv6 )
/* Mark the ND timer as inactive since we are not waiting on any resolution as of now. */
vIPSetNDResolutionTimerEnableState( pdFALSE );
#endif

#if ( ( ipconfigDNS_USE_CALLBACKS != 0 ) && ( ipconfigUSE_DNS != 0 ) )
{
Expand Down Expand Up @@ -648,7 +680,13 @@ void vIPNetworkUpCalls( struct xNetworkEndPoint * pxEndPoint )
#endif /* ipconfigDNS_USE_CALLBACKS != 0 */

/* Set remaining time to 0 so it will become active immediately. */
vResolutionTimerReload( pdMS_TO_TICKS( ipADDR_RES_TIMER_PERIOD_MS ) );
#if ipconfigIS_ENABLED( ipconfigUSE_IPv4 )
vARPTimerReload( pdMS_TO_TICKS( ipARP_TIMER_PERIOD_MS ) );
#endif

#if ipconfigIS_ENABLED( ipconfigUSE_IPv6 )
vNDTimerReload( pdMS_TO_TICKS( ipND_TIMER_PERIOD_MS ) );
#endif
}
/*-----------------------------------------------------------*/

Expand Down Expand Up @@ -1733,20 +1771,47 @@ static void prvProcessEthernetPacket( NetworkBufferDescriptor_t * const pxNetwor

case eWaitingResolution:

if( pxResolutionWaitingNetworkBuffer == NULL )
{
pxResolutionWaitingNetworkBuffer = pxNetworkBuffer;
vIPTimerStartResolution( ipADDR_RES_MAX_DELAY );
#if ipconfigIS_ENABLED( ipconfigUSE_IPv4 )
if( pxEthernetHeader->usFrameType == ipIPv4_FRAME_TYPE )
{
if( pxARPWaitingNetworkBuffer == NULL )
{
pxARPWaitingNetworkBuffer = pxNetworkBuffer;
vIPTimerStartARPResolution( ipARP_RESOLUTION_MAX_DELAY );

iptraceDELAYED_RESOLUTION_REQUEST_STARTED();
}
else
{
/* We are already waiting on one resolution. This frame will be dropped. */
vReleaseNetworkBufferAndDescriptor( pxNetworkBuffer );
iptraceDELAYED_ARP_REQUEST_STARTED();
}
else
{
/* We are already waiting on one resolution. This frame will be dropped. */
vReleaseNetworkBufferAndDescriptor( pxNetworkBuffer );

iptraceDELAYED_RESOLUTION_BUFFER_FULL();
}
iptraceDELAYED_ARP_BUFFER_FULL();
}
break;
}
#endif

#if ipconfigIS_ENABLED( ipconfigUSE_IPv6 )
if( pxEthernetHeader->usFrameType == ipIPv6_FRAME_TYPE )
{
if( pxNDWaitingNetworkBuffer == NULL )
{
pxNDWaitingNetworkBuffer = pxNetworkBuffer;
vIPTimerStartNDResolution( ipND_RESOLUTION_MAX_DELAY );

iptraceDELAYED_ND_REQUEST_STARTED();
}
else
{
/* We are already waiting on one resolution. This frame will be dropped. */
vReleaseNetworkBufferAndDescriptor( pxNetworkBuffer );

iptraceDELAYED_ND_BUFFER_FULL();
}
break;
}
#endif

break;

Expand Down
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