Re: Retransmissions

From: Seng Oon Toh (
Date: 2002-10-12 19:42:10 UTC

How do I disable retransmissions, and wait for ACK in host AP? I'm trying to transmit packets in monitor mode, the packets go out but it retransmits a lot of times. I think its doing this because it can't hear the acks while transmitting.


Seng Oon Toh
Georgia Institute of Technology, Atlanta Georgia, 30332 Email:

On Sat, 12 Oct 2002, Jouni Malinen wrote:

> 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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