mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-11-24 08:41:53 +02:00
04ce7928c6
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@11868 3c298f89-4303-0410-b956-a3cf2f4a3e73
128 lines
4.9 KiB
Diff
128 lines
4.9 KiB
Diff
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
|
|
@@ -655,6 +655,7 @@
|
|
IEEE80211_PARAM_MINRATE = 84, /* Minimum rate (by table index) */
|
|
IEEE80211_PARAM_PROTMODE_RSSI = 85, /* RSSI Threshold for enabling protection mode */
|
|
IEEE80211_PARAM_PROTMODE_TIMEOUT = 86, /* Timeout for expiring protection mode */
|
|
+ IEEE80211_PARAM_BGSCAN_THRESH = 87, /* 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 */
|
|
|
|
@@ -229,6 +231,9 @@
|
|
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 */
|
|
|
|
@@ -612,6 +617,7 @@
|
|
#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
|
|
@@ -2778,6 +2778,9 @@
|
|
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)
|
|
@@ -3181,6 +3184,9 @@
|
|
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;
|
|
@@ -5704,6 +5710,10 @@
|
|
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
|
|
@@ -2984,8 +2984,10 @@
|
|
{
|
|
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
|
|
@@ -3229,6 +3231,23 @@
|
|
/* 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
|
|
@@ -793,7 +793,7 @@
|
|
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;
|