CVS commit: src/sys/dev/ic

[David Young <dyoung%netbsd.org@localhost>]

Module Name:    src
Committed By:   dyoung
Date:           Sun Jul  3 19:42:11 UTC 2005

Modified Files:
        src/sys/dev/ic: ath.c

Log Message:
Bug fix: send all multicast data frames at the lowest possible data
rate, with short preamble turned *off*.  Fixes IBSS operation,
where multicast frames were sent at the highest possible rate with
short preamble turned *on*, so the likelihood of reception was
relatively low, and there was no chance for stations w/o short
preamble capability to receive the frames.

XXX This is a quick fix that I will revisit very soon.  Multicast
data frames are eligible to be sent with short preamble in
IEEE80211_M_STA, IEEE80211_M_HOSTAP modes.  An AP knows who all of
its peers are at all times, so it can make an intelligent decision.
Ditto the AP client.

XXX The rate adaptation should be involved in choosing short/long
preamble.  Also, we can make a reasonable choice of a higher
multicast data rate based on statistics gathered by the rate
adaptation module.


To generate a diff of this commit:
cvs rdiff -r1.50 -r1.51 src/sys/dev/ic/ath.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.