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>Network Layer Functions</H1
><P
> The Z8530 layer provides functions to queue packets for
transmission. The driver internally buffers the frame currently
being transmitted and one further frame (in order to keep back
to back transmission running). Any further buffering is up to
the caller.
</P
><P
> The function <TT
CLASS="FUNCTION"
>z8530_queue_xmit</TT
> takes a network
buffer in sk_buff format and queues it for transmission. The
caller must provide the entire packet with the exception of the
bitstuffing and CRC. This is normally done by the caller via
the syncppp interface layer. It returns 0 if the buffer has been
queued and non zero values for queue full. If the function accepts
the buffer it becomes property of the Z8530 layer and the caller
should not free it.
</P
><P
> The function <TT
CLASS="FUNCTION"
>z8530_get_stats</TT
> returns a pointer
to an internally maintained per interface statistics block. This
provides most of the interface code needed to implement the network
layer get_stats callback.
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