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WHAT'S NEW
FreeRTOS-Plus-TCP now has unified IPv4 and IPv6 functionalities and multi-interface support.
Updated library now generally available. See the blog post.
Achieving Unbrickable MCU FOTA for your FreeRTOS-powered Firmware:
The Microvisor IoT Approach. See the blog post.
FreeRTOS 202012 LTS end of support announced.
You can migrate your project to FreeRTOS 202210.01 LTS or subscribe to the FreeRTOS Extended Maintenance Plan. See the blog post.
FreeRTOS website now available in Simplified Chinese
Search and browse content in your preferred language. See the blog post.
New FreeRTOS Long Term Support version now available.
Receive security patches and critical bug fixes on FreeRTOS libraries for two years. See the blog post.

RA

RA stands for Router Advertisement.

Router Advertisement is a part of IPv6 Neighbour Discovery protocol. Routers periodically send multicast messages to inform devices about their presence and network configuration. RA allows dynamic address configuration, making it easier for devices to connect to the network.

If ipconfigUSE_RA is set to 1 in FreeRTOSIPConfig.h and if the bWantRA bit in the bits field of the endpoint structure is set during the endpoint initialisation, then FreeRTOS-Plus-TCP will attempt to obtain the endpoint's IP address using Router advertisement.

Below is an example endpoint initialisation that enables RA: 

IPv6_Address_t xIPAddress;

IPv6_Address_t xPrefix;

IPv6_Address_t xGateWay;

IPv6_Address_t xDNSServer1, xDNSServer2;



FreeRTOS_inet_pton6( "2001:470:ed44::", xPrefix.ucBytes );



FreeRTOS_CreateIPv6Address( &xIPAddress, &xPrefix, 64, pdTRUE );

FreeRTOS_inet_pton6( "fe80::ba27:ebff:fe5a:d751", xGateWay.ucBytes );



FreeRTOS_FillEndPoint_IPv6( &( xInterfaces[ 0 ] ),

                               &( xEndPoints[ xEndPointCount ] ),

                               &( xIPAddress ),

                               &( xPrefix ),

                               64uL, /* Prefix length. */

                               &( xGateWay ),

                               NULL, /* pxDNSServerAddress: Not used yet. */

                               ucMACAddress );

FreeRTOS_inet_pton6( "2001:4860:4860::8888", xEndPoints[ xEndPointCount ].ipv6_settings.xDNSServerAddresses[ 0 ].ucBytes );

FreeRTOS_inet_pton6( "fe80::1", xEndPoints[ xEndPointCount ].ipv6_settings.xDNSServerAddresses[ 1 ].ucBytes );

FreeRTOS_inet_pton6( "2001:4860:4860::8888", xEndPoints[ xEndPointCount ].ipv6_defaults.xDNSServerAddresses[ 0 ].ucBytes );

FreeRTOS_inet_pton6( "fe80::1", xEndPoints[ xEndPointCount ].ipv6_defaults.xDNSServerAddresses[ 1 ].ucBytes );



#if ( ipconfigUSE_RA != 0 )

{

     /* End-point wants to use RA. */

        xEndPoints[ xEndPointCount ].bits.**bWantRA** = pdTRUE;

}

#endif /* ( ipconfigUSE_RA != 0 ) */
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