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Emac_ioctl()函数



采用setsockopt()接口进行组播设置,跟踪此函数,发现最终调用Emac_ioctl()接口,但在nimu_eth.c文件中却发现Emac_ioctl()函数直接返回0,没有函数实现,那通过setsockopt()接口进行的组播设置是怎么写到网络驱动的呢?