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Hi Juan,<br>
<br>
Thanks for your reply.<br>
<br>
<blockquote type="cite" cite="mid1091393877.3065.2.camel@rimmer">
<blockquote type="cite">
<pre wrap="">Just to share my recent experience with hostap-ver-0.1.3, I found that
multiple TX interrupts seem to pop up for the transmission of a single
short UDP packet. This happens to unicast packets, but does not happen
to broadcast packets. I wonder what may be the cause for this
phenomenon?
</pre>
</blockquote>
<pre wrap=""><!---->
I have no clue about your actual test environment, but...</pre>
</blockquote>
I used two Linux boxes (Stargates 7.1 from Intel Research), with kernel
2.4.19 patched with wireless exetension 14. One node keeps sending
packets to the other node at some frequencies. I changed iwevent.c and
hostap_hw.c to check the number of TX as well as TXEXC interrupts from
the the firmware, then I compared this number to that of the short
packets sent in the application. <br>
<br>
I wonder if the driver sends some control packets for certain
unicast-requests? <br>
<br>
<blockquote type="cite" cite="mid1091393877.3065.2.camel@rimmer">
<pre wrap="">Perhaps it's just that you're seeing the ARP request + the UDP
transmission for unicast transmissions, while there's no ARP request for
broadcast transmissions...</pre>
</blockquote>
In my program, I used MAC address when calling UDP socket functions, so
there should not be any involvement of ARP even for unicast. Please
correct me if I missed anything obvious here? <br>
<br>
Thanks,<br>
<br>
Hongwei<br>
<br>
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