Re: Unexpected primitive ack DL_UNITDATA_IND

[Guy Harris <guy () alum mit edu>]

On Jun 9, 2004, at 1:27 PM, Rick Jones wrote:

> Does it always happen or just sometimes?  A DL_UNITDATA_IND is 
> basically saying "Hi there, here is a packet" in DLPI speak.  It looks 
> like the stream is sending one of those up to the application when 
> libpcap isn't expecting it.

In fact, it's sending one up when, presumably, libpcap is waiting for a 
DL_INFO_ACK in response to a DL_INFO_REQ it sent downstream to 
determine either the DLPI provider style or the link-layer type.

I don't have the DLPI spec handy; currently, pcap-dlpi.c makes two info 
requests, one just after opening the device and one after binding to 
the PPA (but *before* setting DLIOCRAW or pushing "bufmod") - can a 
DLPI provider cough up packets at that point?

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