ACK duration field wrong with fragmentation?

Antonio Vilei antonio.vilei at
Tue Mar 11 06:56:41 EST 2003

I was using wlansniff and I noticed that when a station (Prism2.5 based fw
v1.3.6) sends fragments, the duration field in the fragments is correct, but
duration field value in the each ACK is zero. Shouldn't it be non zero (not
in the last ACK of course where zero is correct)?

Is it a firmware bug?

Thanks in advance,

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