[HostAP] Re: Retransmissions

Jouni Malinen jkmaline at cc.hut.fi
Sat Oct 12 11:19:21 EDT 2002

On Sat, Oct 12, 2002 at 10:15:39AM -0400, Arunchandar Vasan wrote:

> Is there anyway I can get the number of retransmissions a frame underwent 
> from  the driver ?

I'm not aware of such mechanism in the current firmware version. If this
were available, it would probably be stored in TX frame description that
can be read in TX event (i.e., successful transmit). TX desc has
retry_count field, but it is apparently not yet implemented.

Anyway, I modified the driver a bit to make it more clear where this
information would be available. hostap_hw.c now has a function,
prism2_tx_ev() that takes care of TX events. If prism2_param 'dump' is
set to have bit1 set (TX hdr dump), some fields from the TX descriptor
are shown in this function. Please note, that TX event is not used in
the default configuration; it can be enabled by defining
PRISM2_USE_TX_INTERRUPT (see hostap_config.h).

Jouni Malinen                                            PGP id EFC895FA

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