Date: Mon, 5 Dec 2005 09:59:58 +1100 From: "Lang, Tanja" <tlang@csu.edu.au> To: <freebsd-hackers@freebsd.org> Subject: noise level measurement with Atheros driver Message-ID: <0C7AF4692D7A6143A72AD00E5681D7E5ADA454@ESWW02.CSUMain.csu.edu.au>
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Hi, =20 I would like to record signal strength and noise level for each client packet received on a wireless access point. I found the fields IEEE80211_RADIOTAP_DBM_ANTSIGNAL and IEEE80211_RADIOTAP_DBM_ANTNOISE in the radiotap header which should give me this information.=20 =20 The 'wi' interface sets both of these values in if_wi.c=20 if_wi.c: sc->sc_rx_th.wr_antnoise =3D = frmhdr.wi_rx_silence; if_wi.c: sc->sc_rx_th.wr_antsignal =3D = frmhdr.wi_rx_signal; =20 While the 'ath' interface only provides signal strength information. if_ath.c sc->sc_rx_th.wr_antsignal =3D = ds->ds_rxstat.rs_rssi; =20 Is the Atheros driver (which my current wireless card in the AP uses) capable of providing noise information? If yes, which line needs to be added in if_ath.c? =20 Thanks, Tanja =20
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