关于数据发送方面和接收差不多,在上层协议放置好数据到mbuf链后,调用el_start函数,该函数把mbuf链中

的数据放置到本块网卡的发送队列缓冲el_pktbuf中,然后再调用el_xmit函数,此函数把发送队列缓冲el_pktbuf

中的数据有传递到网卡的数据存储器中.-On the data sent and received more or less the same place in the upper good deal of data to the mbuf chain, the el_start call function, the function to the data in the mbuf chain to the block to place the card in el_pktbuf send queue buffer, and then call el_xmit function, this function to send queue buffer el_pktbuf transfer of data to the card data memory.