mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-12-25 13:11:09 +02:00
madwifi: add an optional background scanning threshold triggered by low rssi
(useful for passing updated scan results to the wpa_supplicant ahead of time, before losing connectivity entirely) git-svn-id: svn://svn.openwrt.org/openwrt/trunk@11794 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
nbd
parent
ff6f490212
commit
617671d795
127
package/madwifi/patches/357-bgscan_thresh.patch
Normal file
127
package/madwifi/patches/357-bgscan_thresh.patch
Normal file
@ -0,0 +1,127 @@
|
||||
Add an optional background scanning threshold triggered by low rssi
|
||||
(useful for passing updated scan results to the supplicant ahead of
|
||||
time, before losing connectivity entirely)
|
||||
|
||||
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
|
||||
|
||||
--- a/net80211/ieee80211_ioctl.h
|
||||
+++ b/net80211/ieee80211_ioctl.h
|
||||
@@ -646,6 +646,7 @@
|
||||
IEEE80211_PARAM_MINRATE = 76, /* Maximum rate (by table index) */
|
||||
IEEE80211_PARAM_PROTMODE_RSSI = 77, /* RSSI Threshold for enabling protection mode */
|
||||
IEEE80211_PARAM_PROTMODE_TIMEOUT = 78, /* Timeout for expiring protection mode */
|
||||
+ IEEE80211_PARAM_BGSCAN_THRESH = 79, /* bg scan rssi threshold */
|
||||
};
|
||||
|
||||
#define SIOCG80211STATS (SIOCDEVPRIVATE+2)
|
||||
--- a/net80211/ieee80211_var.h
|
||||
+++ b/net80211/ieee80211_var.h
|
||||
@@ -92,6 +92,8 @@
|
||||
#define IEEE80211_BGSCAN_IDLE_MIN 100 /* min idle time (ms) */
|
||||
#define IEEE80211_BGSCAN_IDLE_DEFAULT 250 /* default idle time (ms) */
|
||||
|
||||
+#define IEEE80211_BGSCAN_TRIGGER_INTVL 20 /* min trigger interval for thresh based bgscan (secs) */
|
||||
+
|
||||
#define IEEE80211_COVERAGE_CLASS_MAX 31 /* max coverage class */
|
||||
#define IEEE80211_REGCLASSIDS_MAX 10 /* max regclass id list */
|
||||
|
||||
@@ -219,6 +221,9 @@
|
||||
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 */
|
||||
u_int iv_scanvalid; /* scan cache valid threshold */
|
||||
struct ieee80211_roam iv_roam; /* sta-mode roaming state */
|
||||
|
||||
@@ -608,6 +613,7 @@
|
||||
#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 */
|
||||
+#define IEEE80211_FEXT_BGSCAN_THR 0x00002000 /* bgscan due to low rssi */
|
||||
|
||||
#define IEEE80211_COM_UAPSD_ENABLE(_ic) ((_ic)->ic_flags_ext |= IEEE80211_FEXT_UAPSD)
|
||||
#define IEEE80211_COM_UAPSD_DISABLE(_ic) ((_ic)->ic_flags_ext &= ~IEEE80211_FEXT_UAPSD)
|
||||
--- a/net80211/ieee80211_wireless.c
|
||||
+++ b/net80211/ieee80211_wireless.c
|
||||
@@ -2744,6 +2744,9 @@
|
||||
else
|
||||
retv = EINVAL;
|
||||
break;
|
||||
+ case IEEE80211_PARAM_BGSCAN_THRESH:
|
||||
+ vap->iv_bgscanthr = value;
|
||||
+ break;
|
||||
case IEEE80211_PARAM_MCAST_RATE:
|
||||
/* units are in KILObits per second */
|
||||
if (value >= 256 && value <= 54000)
|
||||
@@ -3144,6 +3147,9 @@
|
||||
case IEEE80211_PARAM_BGSCAN_INTERVAL:
|
||||
param[0] = vap->iv_bgscanintvl / HZ; /* seconds */
|
||||
break;
|
||||
+ case IEEE80211_PARAM_BGSCAN_THRESH:
|
||||
+ param[0] = vap->iv_bgscanthr; /* rssi */
|
||||
+ break;
|
||||
case IEEE80211_PARAM_MCAST_RATE:
|
||||
param[0] = vap->iv_mcast_rate; /* seconds */
|
||||
break;
|
||||
@@ -5666,6 +5672,10 @@
|
||||
IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 1, 0, "bgscanintvl" },
|
||||
{ IEEE80211_PARAM_BGSCAN_INTERVAL,
|
||||
0, IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 1, "get_bgscanintvl" },
|
||||
+ { IEEE80211_PARAM_BGSCAN_THRESH,
|
||||
+ IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 1, 0, "bgscanthr" },
|
||||
+ { IEEE80211_PARAM_BGSCAN_THRESH,
|
||||
+ 0, IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 1, "get_bgscanthr" },
|
||||
{ IEEE80211_PARAM_MCAST_RATE,
|
||||
IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 1, 0, "mcast_rate" },
|
||||
{ IEEE80211_PARAM_MCAST_RATE,
|
||||
--- a/net80211/ieee80211_input.c
|
||||
+++ b/net80211/ieee80211_input.c
|
||||
@@ -3013,8 +3013,10 @@
|
||||
{
|
||||
struct ieee80211com *ic = vap->iv_ic;
|
||||
|
||||
+ vap->iv_bgscantrintvl = (vap->iv_bgscantrintvl + 1) % 4;
|
||||
return ((ic->ic_flags_ext & IEEE80211_FEXT_BGSCAN) &&
|
||||
- time_after(jiffies, ic->ic_lastdata + vap->iv_bgscanidle));
|
||||
+ (((ic->ic_flags_ext & IEEE80211_FEXT_BGSCAN_THR) && !vap->iv_bgscantrintvl) ||
|
||||
+ time_after(jiffies, ic->ic_lastdata + vap->iv_bgscanidle)));
|
||||
}
|
||||
|
||||
static __inline int
|
||||
@@ -3258,6 +3260,23 @@
|
||||
/* 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) &&
|
||||
+ (!vap->iv_bgscanthr_next ||
|
||||
+ !time_before(jiffies, vap->iv_bgscanthr_next)) &&
|
||||
+ !(ic->ic_flags & IEEE80211_F_SCAN)) {
|
||||
+ int ret;
|
||||
+
|
||||
+ ic->ic_lastdata = 0;
|
||||
+ ic->ic_lastscan = 0;
|
||||
+ ic->ic_flags_ext |= IEEE80211_FEXT_BGSCAN_THR;
|
||||
+ ret = ieee80211_bg_scan(vap);
|
||||
+ if (ret)
|
||||
+ vap->iv_bgscanthr_next = jiffies + msecs_to_jiffies(IEEE80211_BGSCAN_TRIGGER_INTVL * 1000);
|
||||
+ }
|
||||
+
|
||||
if (ni->ni_intval != scan.bintval) {
|
||||
IEEE80211_NOTE(vap, IEEE80211_MSG_ASSOC, ni,
|
||||
"beacon interval divergence: "
|
||||
--- a/net80211/ieee80211_scan.c
|
||||
+++ b/net80211/ieee80211_scan.c
|
||||
@@ -782,7 +782,7 @@
|
||||
ieee80211_sta_pwrsave(vap, 0);
|
||||
if (ss->ss_next >= ss->ss_last) {
|
||||
ieee80211_notify_scan_done(vap);
|
||||
- ic->ic_flags_ext &= ~IEEE80211_FEXT_BGSCAN;
|
||||
+ ic->ic_flags_ext &= ~(IEEE80211_FEXT_BGSCAN|IEEE80211_FEXT_BGSCAN_THR);
|
||||
}
|
||||
}
|
||||
SCAN_PRIVATE(ss)->ss_iflags &= ~ISCAN_CANCEL;
|
||||
Loading…
Reference in New Issue
Block a user