madwifi: reduce the packet loss impact of forced background scans triggered by the...

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@11925 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/package/madwifi/patches/357-bgscan_thresh.patch b/package/madwifi/patches/357-bgscan_thresh.patch
index e0d5752..9255768 100644 (file)
--- 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

diff --git a/package/madwifi/patches/362-rssithr.patch b/package/madwifi/patches/362-rssithr.patch
index 137e64a..c1654d5 100644 (file)
--- a/package/madwifi/patches/362-rssithr.patch
+++ b/package/madwifi/patches/362-rssithr.patch
@@ -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 */