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madwifi: reduce the packet loss impact of forced background scans triggered by the configured threshold

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git-svn-id: svn://svn.openwrt.org/openwrt/trunk@11925 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
nbd
2008-07-25 22:36:18 +00:00
parent b4d5d57d94
commit c3e464ad09
2 changed files with 48 additions and 13 deletions
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16
package/madwifi/patches/362-rssithr.patch
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@@ -59,10 +59,11 @@ Signed-off-by: Felix Fietkau <nbd@openwrt.org>
{ IEEE80211_PARAM_UAPSDINFO,
--- a/net80211/ieee80211_input.c
+++ b/net80211/ieee80211_input.c
@@ -3263,6 +3263,17 @@
@@ -3261,6 +3261,19 @@
memcpy(ni->ni_tstamp.data, scan.tstamp,
sizeof(ni->ni_tstamp));
/* When rssi is low, start doing bgscans more frequently to allow
* the supplicant to make a better switching decision */
+ /* when rssi falls below the disconnection threshold, drop the connection */
+ if ((vap->iv_rssi_dis_thr > 0) && (vap->iv_rssi_dis_max > 0)) {
+ if ((rssi > 0) && (rssi < vap->iv_rssi_dis_thr)) {
+ if (++vap->iv_rssi_dis_trig > vap->iv_rssi_dis_max) {
@@ -74,9 +75,10 @@ Signed-off-by: Felix Fietkau <nbd@openwrt.org>
+ vap->iv_rssi_dis_trig = 0;
+ }
+ }
if ((rssi < vap->iv_bgscanthr) &&
(!vap->iv_bgscanthr_next ||
!time_before(jiffies, vap->iv_bgscanthr_next)) &&
+
/* When rssi is low, start doing bgscans more frequently to allow
* the supplicant to make a better switching decision */
if (!(ic->ic_flags & IEEE80211_F_SCAN) && (rssi < vap->iv_bgscanthr) &&
--- a/net80211/ieee80211_var.h
+++ b/net80211/ieee80211_var.h
@@ -223,6 +223,9 @@
@@ -87,5 +89,5 @@ Signed-off-by: Felix Fietkau <nbd@openwrt.org>
+ u_int iv_rssi_dis_max; /* max beacons below disconnect threshold */
+ u_int iv_rssi_dis_trig; /* rssi disassoc trigger count */
unsigned long iv_bgscanthr_next; /* last trigger for bgscan */
unsigned long iv_lastconnect; /* time of last connect attempt */
u_int iv_scanvalid; /* scan cache valid threshold */
struct ieee80211_roam iv_roam; /* sta-mode roaming state */