Re: rids

From: Jouni Malinen (
Date: 2002-10-13 05:24:19 UTC

On Fri, Oct 11, 2002 at 10:12:17AM +0200, Victor Aleo wrote:

> I would like to know what exactly the file /proc/net/prism2/wlan#/rids
> contains. It seems to me that is the information related to the MIBs
> specified by the standard. Is that true?

That is a debug dump of all the known RIDS (FC?? being configurable items and FD?? read-only info). Many of these do indeed map quite well to MIBs.

Please note, that /proc/net/prism2/wlan#/rids is the old path to this file, prism2 was changed to hostap in a newer version and the latest release actually removed the whole file from the driver. The same information is now available using user space program utils/hostap_diag.

> More precisely, I am interested in FD88 (by the way, what it means
> FD88?) SCANRESULTSTABLE. I guess this is the APs that the STA has found
> in the scanning process.

It is the RID number FD88 (0xfd88) and yes, this RID should have the results of the last scan. However, it does not seem to be available properly on all firmware versions so using ScanResults info frame in host-based roaming mode might be better solution for getting the scanning results.

> Can I request (e.g., SNMP request) from the AP to the associated STA

Sure you can request that ;-), but the station in question should have some software running on the host system to reply to this.. Most probably standards STAs do not have support for this. There is some kind of protocol for asking the other end's signal quality and nick name etc.. However, I haven't seen any standard describing this so I'm not fully sure about the contents of the frames used for this query. Anyway, I do not think they include full scanning results.

Jouni Malinen                                            PGP id EFC895FA

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