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| author | Felix Fietkau <nbd@openwrt.org> | 2008-07-25 22:36:18 +0000 |
|---|---|---|
| committer | Felix Fietkau <nbd@openwrt.org> | 2008-07-25 22:36:18 +0000 |
| commit | 9866151941e1081a24c113ed9afe442b35284a57 (patch) | |
| tree | 6292a0ff221a2e3c312adf793a4f9a750d098e47 /package/madwifi/patches/357-bgscan_thresh.patch | |
| parent | 192e5ac41d6ff15f04578c950f87e7a34824f304 (diff) | |
| download | upstream-9866151941e1081a24c113ed9afe442b35284a57.tar.gz upstream-9866151941e1081a24c113ed9afe442b35284a57.tar.bz2 upstream-9866151941e1081a24c113ed9afe442b35284a57.zip | |
madwifi: reduce the packet loss impact of forced background scans triggered by the configured threshold
SVN-Revision: 11925
Diffstat (limited to 'package/madwifi/patches/357-bgscan_thresh.patch')
| -rw-r--r-- | package/madwifi/patches/357-bgscan_thresh.patch | 45 |
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 |