ethernet帧解析，根据截获得数据包，按照以太帧结构解析，crc8校验-ethernet frame to resolve, in accordance with cut-off access to data packets, in accordance with the Ethernet frame structure analysis, crc-8 Checksum-8校验-ethernet frame to resolve, in accordance with cut-off access to data packets, in accordance with the Ethernet frame structure analysis, crc-8 Checksum