Re: Please somebody explain this

Hi Ivica,

On Tue, 27 Jan 2004, Ivica [iso-8859-2] Bo?uli? wrote:

> Please can somebody explain this lines
>
> Jan 27 10:46:47 ivica kernel: at76c503.c: 0xd8a40780: bssid 00:10:e7:b5:01:95
> channel 7 ssid IIDSplit (49494453706C6974) capa x0015 rates 82 84 0B 16 rssi
> 0 link 0 noise 0
> ...

> This is what I dont know
>
> capa x0041
> capa x0001
> capa x0031

Capabilities broadcasted in the beacon of the BSS:
bit0 set - ESS (i.e. this is an access point)
bit1 set - IBSS (i.e. an ad-hoc IBSS)
bit4 set - WEP enabled
bit5 set - short preamble used
bit6 set - no idea, maybe PBCC modulation

> rates 82 84 8B 96 and
> rates 82 84 0B 16 2C

The supported rates of the (I)BSS: bit 7 set means this is a basic rate
(i.e. it _must_ be supported by the client), bit6-0 is the rate in units
of 500 Kbit/s, e.g.
82 - basic rate 1 MBit/s
96 - basic rate 11 MBit/s
0B - optional rate 5.5 MBit/s

Capability and rate coding is defined in the 802.11 standard.

> timeout 2000

This is the parameter JoinFailureTimeout of the JoinRequest command to the
firmware, I guess the firmware will timeout in that many ms (e.g. if the
BSS disappeared meanwhile).

> ssid HTmobile (48546D6F62696C65)
> ssid WIREGEN (5749524547454E)

The numbers in (..) are the ASCII codes of the ssid printed before,
in case someone has non-printable chars in the ssid.

> Is there any utility to make this info human readable?

no, only your eyes reading the driver's source code ;-)

I've added these lines for debugging purpose only, a normal user
shouldn't bother about them. The rates are explained on
the support page of the website.

BTW, the BSS table is output twice into syslog:
first after an active scan with ANY ssid and second after an active scan
with the configured ssid. Results are merged to get a better overview on
the environment.

 /Jörg