madwifi: add an optional threshold for low-rssi disconnection. This can be useful...

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@11799 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/package/madwifi/patches/362-rssithr.patch b/package/madwifi/patches/362-rssithr.patch
new file mode 100644 (file)
index 0000000..137e64a
--- /dev/null
+++ b/package/madwifi/patches/362-rssithr.patch
@@ -0,0 +1,91 @@
+Add an optional threshold for low-rssi disconnection. This can be useful
+when letting wpa_supplicant control roaming.
+
+Signed-off-by: Felix Fietkau <nbd@openwrt.org>
+
+--- a/net80211/ieee80211_ioctl.h
++++ b/net80211/ieee80211_ioctl.h
+@@ -647,6 +647,8 @@
+       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 */
++      IEEE80211_PARAM_RSSI_DIS_THR    = 80,   /* rssi threshold for disconnection */
++      IEEE80211_PARAM_RSSI_DIS_COUNT  = 81,   /* counter for rssi threshold */
+ };
+ 
+ #define       SIOCG80211STATS                 (SIOCDEVPRIVATE+2)
+--- a/net80211/ieee80211_wireless.c
++++ b/net80211/ieee80211_wireless.c
+@@ -2798,6 +2798,12 @@
+       case IEEE80211_PARAM_ROAM_RATE_11G:
+               vap->iv_roam.rate11b = value;
+               break;
++      case IEEE80211_PARAM_RSSI_DIS_THR:
++              vap->iv_rssi_dis_thr = value;
++              break;
++      case IEEE80211_PARAM_RSSI_DIS_COUNT:
++              vap->iv_rssi_dis_max = value;
++              break;
+       case IEEE80211_PARAM_UAPSDINFO:
+               if (vap->iv_opmode == IEEE80211_M_HOSTAP) {
+                       if (ic->ic_caps & IEEE80211_C_UAPSD) {
+@@ -3183,6 +3189,12 @@
+       case IEEE80211_PARAM_ROAM_RATE_11G:
+               param[0] = vap->iv_roam.rate11b;
+               break;
++      case IEEE80211_PARAM_RSSI_DIS_THR:
++              param[0] = vap->iv_rssi_dis_thr;
++              break;
++      case IEEE80211_PARAM_RSSI_DIS_COUNT:
++              param[0] = vap->iv_rssi_dis_max;
++              break;
+       case IEEE80211_PARAM_UAPSDINFO:
+               if (vap->iv_opmode == IEEE80211_M_HOSTAP) {
+                       if (IEEE80211_VAP_UAPSD_ENABLED(vap))
+@@ -5732,6 +5744,14 @@
+         IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 1, 0, "rate11g" },
+       { IEEE80211_PARAM_ROAM_RATE_11G,
+         0, IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 1, "get_rate11g" },
++      { IEEE80211_PARAM_RSSI_DIS_THR,
++        IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 1, 0, "rssi_disthr" },
++      { IEEE80211_PARAM_RSSI_DIS_THR,
++        0, IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 1, "get_rssi_disthr" },
++      { IEEE80211_PARAM_RSSI_DIS_COUNT,
++        IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 1, 0, "rssi_discnt" },
++      { IEEE80211_PARAM_RSSI_DIS_COUNT,
++        0, IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 1, "get_rssi_discnt" },
+       { IEEE80211_PARAM_UAPSDINFO,
+         IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 1, 0, "uapsd" },
+       { IEEE80211_PARAM_UAPSDINFO,
+--- a/net80211/ieee80211_input.c
++++ b/net80211/ieee80211_input.c
+@@ -3263,6 +3263,17 @@
+ 
+                       /* When rssi is low, start doing bgscans more frequently to allow
+                        * the supplicant to make a better switching decision */
++                      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) {
++                                              vap->iv_rssi_dis_trig = 0;
++                                              ieee80211_node_leave(ni);
++                                              return;
++                                      }
++                              } else {
++                                      vap->iv_rssi_dis_trig = 0;
++                              }
++                      }
+                       if ((rssi < vap->iv_bgscanthr) &&
+                                       (!vap->iv_bgscanthr_next ||
+                                               !time_before(jiffies, vap->iv_bgscanthr_next)) &&
+--- a/net80211/ieee80211_var.h
++++ b/net80211/ieee80211_var.h
+@@ -223,6 +223,9 @@
+       u_int iv_bgscanintvl;                           /* bg scan min interval */
+       u_int iv_bgscanthr;                                     /* bg scan rssi threshold */
+       u_int iv_bgscantrintvl;                         /* bg scan trigger interval */
++      u_int iv_rssi_dis_thr;                          /* rssi disassoc threshold */
++      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 */
+       u_int iv_scanvalid;                             /* scan cache valid threshold */
+       struct ieee80211_roam iv_roam;                  /* sta-mode roaming state */