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[PATCH] mac80211: improved 802.11g CTS protection

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Currently, CTS protection is partially implemented twice:
 1. via prism2 ioctls, only used by hostapd
 2. via STA beacon parsing, recorded in sta.use_protection but never used
    (other than printed in debugfs)

Protection control should be implemented on a per-subif basis. For example,
a single physical device may be running a soft AP on one channel, and a STA
on another. The AP interface should use protection based on what hostapd told
it, and the STA interface should use protection based on beacon parsing.
These should operate independantly: one subif using protection should not
influence the other.

To implement this, I moved the use_protection flag into ieee80211_sub_if_data
and removed the device-global cts_protect_erp_frames flag.

I also made the PRISM2_PARAM_CTS_PROTECT_ERP_FRAMES write operation only
available for AP interfaces, to avoid any possibility of the user messing with
the behaviour of a STA.

Signed-off-by: Daniel Drake <dsd@gentoo.org>
Signed-off-by: Jiri Benc <jbenc@suse.cz>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Daniel Drake
2007-07-10 19:32:11 +02:00
committed by John W. Linville
parent 5628221caf
commit 63fc33ceb0
5 changed files with 13 additions and 12 deletions
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3
net/mac80211/ieee80211_i.h
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@@ -241,7 +241,6 @@ struct ieee80211_if_sta {
unsigned int authenticated:1;
unsigned int associated:1;
unsigned int probereq_poll:1;
unsigned int use_protection:1;
unsigned int create_ibss:1;
unsigned int mixed_cell:1;
unsigned int wmm_enabled:1;
@@ -284,6 +283,7 @@ struct ieee80211_sub_if_data {
int mc_count;
unsigned int allmulti:1;
unsigned int promisc:1;
unsigned int use_protection:1; /* CTS protect ERP frames */
struct net_device_stats stats;
int drop_unencrypted;
@@ -444,7 +444,6 @@ struct ieee80211_local {
int *basic_rates[NUM_IEEE80211_MODES];
int rts_threshold;
int cts_protect_erp_frames;
int fragmentation_threshold;
int short_retry_limit; /* dot11ShortRetryLimit */
int long_retry_limit; /* dot11LongRetryLimit */