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authorFelix Fietkau <nbd@openwrt.org>2008-07-25 22:36:18 +0000
committerFelix Fietkau <nbd@openwrt.org>2008-07-25 22:36:18 +0000
commit82ea13576e6ef50714778e52a3e075bcd5d9c032 (patch)
tree51032ba164788bb0c5f5a53547359c9689a2b00f /package/madwifi/patches/357-bgscan_thresh.patch
parent3498c2abe9885d441f842d018cd5eb2eab67f424 (diff)
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madwifi: reduce the packet loss impact of forced background scans triggered by the configured threshold
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@11925 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'package/madwifi/patches/357-bgscan_thresh.patch')
-rw-r--r--package/madwifi/patches/357-bgscan_thresh.patch45
1 files changed, 39 insertions, 6 deletions
diff --git a/package/madwifi/patches/357-bgscan_thresh.patch b/package/madwifi/patches/357-bgscan_thresh.patch
index e0d5752b32..9255768f67 100644
--- a/package/madwifi/patches/357-bgscan_thresh.patch
+++ b/package/madwifi/patches/357-bgscan_thresh.patch
@@ -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