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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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45
package/madwifi/patches/357-bgscan_thresh.patch
View File

@ -25,17 +25,18 @@ Signed-off-by: Felix Fietkau <nbd@openwrt.org>
#define IEEE80211_COVERAGE_CLASS_MAX 31 /* max coverage class */
#define IEEE80211_REGCLASSIDS_MAX 10 /* max regclass id list */
@@ -219,6 +221,9 @@
@@ -219,6 +221,10 @@
u_int8_t iv_nickname[IEEE80211_NWID_LEN];
u_int iv_bgscanidle; /* bg scan idle threshold */
u_int iv_bgscanintvl; /* bg scan min interval */
+ u_int iv_bgscanthr; /* bg scan rssi threshold */
+ u_int iv_bgscantrintvl; /* bg scan trigger interval */
+ 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 */
@@ -608,6 +613,7 @@
@@ -608,6 +614,7 @@
#define IEEE80211_FEXT_SWBMISS 0x00000400 /* CONF: use software beacon timer */
#define IEEE80211_FEXT_DROPUNENC_EAPOL 0x00000800 /* CONF: drop unencrypted eapol frames */
#define IEEE80211_FEXT_APPIE_UPDATE 0x00001000 /* STATE: beacon APP IE updated */
@ -90,17 +91,19 @@ Signed-off-by: Felix Fietkau <nbd@openwrt.org>
}
static __inline int
@@ -3258,6 +3260,23 @@
@@ -3258,6 +3260,25 @@
/* record tsf of last beacon */
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 */
+ if ((rssi < vap->iv_bgscanthr) &&
+ if (!(ic->ic_flags & IEEE80211_F_SCAN) && (rssi < vap->iv_bgscanthr) &&
+ (!vap->iv_bgscanthr_next ||
+ !time_before(jiffies, vap->iv_bgscanthr_next)) &&
+ !(ic->ic_flags & IEEE80211_F_SCAN)) {
+ (vap->iv_state == IEEE80211_S_RUN) &&
+ time_after(jiffies, vap->iv_lastconnect +
+ msecs_to_jiffies(IEEE80211_BGSCAN_INTVAL_MIN * 1000))) {
+ int ret;
+
+ ic->ic_lastdata = 0;
@ -116,7 +119,15 @@ Signed-off-by: Felix Fietkau <nbd@openwrt.org>
"beacon interval divergence: "
--- a/net80211/ieee80211_scan.c
+++ b/net80211/ieee80211_scan.c
@@ -782,7 +782,7 @@
@@ -616,6 +616,7 @@
/* clear bg scan NOPICK and mark cancel request */
ss->ss_flags &= ~IEEE80211_SCAN_NOPICK;
+ ic->ic_flags_ext &= ~IEEE80211_FEXT_BGSCAN_THR;
SCAN_PRIVATE(ss)->ss_iflags |= ISCAN_CANCEL;
ss->ss_ops->scan_cancel(ss, vap);
/* force it to fire asap */
@@ -782,7 +783,7 @@
ieee80211_sta_pwrsave(vap, 0);
if (ss->ss_next >= ss->ss_last) {
ieee80211_notify_scan_done(vap);
@ -125,3 +136,25 @@ Signed-off-by: Felix Fietkau <nbd@openwrt.org>
}
}
SCAN_PRIVATE(ss)->ss_iflags &= ~ISCAN_CANCEL;
--- a/net80211/ieee80211_proto.c
+++ b/net80211/ieee80211_proto.c
@@ -1450,6 +1450,7 @@
}
break;
case IEEE80211_S_AUTH:
+ vap->iv_lastconnect = jiffies;
/* auth frames are possible between IBSS nodes,
* see 802.11-1999, chapter 5.7.6 */
KASSERT(vap->iv_opmode == IEEE80211_M_STA ||
--- a/net80211/ieee80211_output.c
+++ b/net80211/ieee80211_output.c
@@ -238,7 +238,8 @@
}
/* Cancel any running BG scan */
- ieee80211_cancel_scan(vap);
+ if (!(ic->ic_flags_ext & IEEE80211_FEXT_BGSCAN_THR) && (vap->iv_state == IEEE80211_S_RUN))
+ ieee80211_cancel_scan(vap);
/*
* Find the node for the destination so we can do

16
package/madwifi/patches/362-rssithr.patch
View File

@ -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 */