RA
RA 指的是路由器通告。
路由器通告是 IPv6 邻居发现协议的一部分。路由器定期发送多播消息,
告知设备其存在,同时告知网络配置。RA 允许动态地址配置,使设备更轻松地
连接到网络。
如果 ipconfigUSE_RA 在 FreeRTOSIPConfig.h 中设置为 1
并且在端点初始化过程中设置了端点结构体 bits
字段中的 bWantRA
位,
则 FreeRTOS-Plus-TCP 将尝试通过路由器通告获取端点的 IP 地址。
以下是启用 RA 的端点初始化示例:
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,
&( xGateWay ),
NULL,
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 )
{
xEndPoints[ xEndPointCount ].bits.**bWantRA** = pdTRUE;
}
#endif
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