package/madwifi/patches-r3776/327-rssi_disconnect.patch

   1 Add an optional threshold for low-rssi disconnection. This can be useful
   2 when letting wpa_supplicant control roaming.
   3
   4 Signed-off-by: Felix Fietkau <nbd@openwrt.org>
   5
   6 Index: madwifi-trunk-r3776/net80211/ieee80211_ioctl.h
   7 ===================================================================
   8 --- madwifi-trunk-r3776.orig/net80211/ieee80211_ioctl.h 2008-07-17 04:03:30.000000000 +0200
   9 +++ madwifi-trunk-r3776/net80211/ieee80211_ioctl.h      2008-07-17 04:07:29.000000000 +0200
  10 @@ -656,6 +656,8 @@
  11         IEEE80211_PARAM_PROTMODE_RSSI           = 85,   /* RSSI Threshold for enabling protection mode */
  12         IEEE80211_PARAM_PROTMODE_TIMEOUT        = 86,   /* Timeout for expiring protection mode */
  13         IEEE80211_PARAM_BGSCAN_THRESH           = 87,   /* bg scan rssi threshold */
  14 +       IEEE80211_PARAM_RSSI_DIS_THR    = 88,   /* rssi threshold for disconnection */
  15 +       IEEE80211_PARAM_RSSI_DIS_COUNT  = 89,   /* counter for rssi threshold */
  16  };
  17
  18  #define        SIOCG80211STATS                 (SIOCDEVPRIVATE+2)
  19 Index: madwifi-trunk-r3776/net80211/ieee80211_wireless.c
  20 ===================================================================
  21 --- madwifi-trunk-r3776.orig/net80211/ieee80211_wireless.c      2008-07-17 04:03:07.000000000 +0200
  22 +++ madwifi-trunk-r3776/net80211/ieee80211_wireless.c   2008-07-17 04:07:56.000000000 +0200
  23 @@ -2832,6 +2832,12 @@
  24         case IEEE80211_PARAM_ROAM_RATE_11G:
  25                 vap->iv_roam.rate11g = value;
  26                 break;
  27 +       case IEEE80211_PARAM_RSSI_DIS_THR:
  28 +               vap->iv_rssi_dis_thr = value;
  29 +               break;
  30 +       case IEEE80211_PARAM_RSSI_DIS_COUNT:
  31 +               vap->iv_rssi_dis_max = value;
  32 +               break;
  33         case IEEE80211_PARAM_UAPSDINFO:
  34                 if (vap->iv_opmode == IEEE80211_M_HOSTAP) {
  35                         if (ic->ic_caps & IEEE80211_C_UAPSD) {
  36 @@ -3220,6 +3226,12 @@
  37         case IEEE80211_PARAM_ROAM_RATE_11G:
  38                 param[0] = vap->iv_roam.rate11g;
  39                 break;
  40 +       case IEEE80211_PARAM_RSSI_DIS_THR:
  41 +               param[0] = vap->iv_rssi_dis_thr;
  42 +               break;
  43 +       case IEEE80211_PARAM_RSSI_DIS_COUNT:
  44 +               param[0] = vap->iv_rssi_dis_max;
  45 +               break;
  46         case IEEE80211_PARAM_UAPSDINFO:
  47                 if (vap->iv_opmode == IEEE80211_M_HOSTAP) {
  48                         if (IEEE80211_VAP_UAPSD_ENABLED(vap))
  49 @@ -5770,6 +5782,14 @@
  50           IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 1, 0, "rate11g_x2" },
  51         { IEEE80211_PARAM_ROAM_RATE_11G,
  52           0, IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 1, "get_rate11g_x2" },
  53 +       { IEEE80211_PARAM_RSSI_DIS_THR,
  54 +         IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 1, 0, "rssi_disthr" },
  55 +       { IEEE80211_PARAM_RSSI_DIS_THR,
  56 +         0, IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 1, "get_rssi_disthr" },
  57 +       { IEEE80211_PARAM_RSSI_DIS_COUNT,
  58 +         IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 1, 0, "rssi_discnt" },
  59 +       { IEEE80211_PARAM_RSSI_DIS_COUNT,
  60 +         0, IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 1, "get_rssi_discnt" },
  61         { IEEE80211_PARAM_UAPSDINFO,
  62           IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 1, 0, "uapsd" },
  63         { IEEE80211_PARAM_UAPSDINFO,
  64 Index: madwifi-trunk-r3776/net80211/ieee80211_input.c
  65 ===================================================================
  66 --- madwifi-trunk-r3776.orig/net80211/ieee80211_input.c 2008-07-17 04:07:08.000000000 +0200
  67 +++ madwifi-trunk-r3776/net80211/ieee80211_input.c      2008-07-17 04:09:03.000000000 +0200
  68 @@ -3234,6 +3234,17 @@
  69
  70                         /* When rssi is low, start doing bgscans more frequently to allow
  71                          * the supplicant to make a better switching decision */
  72 +                       if ((vap->iv_rssi_dis_thr > 0) && (vap->iv_rssi_dis_max > 0)) {
  73 +                               if ((rssi > 0) && (rssi < vap->iv_rssi_dis_thr)) {
  74 +                                       if (++vap->iv_rssi_dis_trig > vap->iv_rssi_dis_max) {
  75 +                                               vap->iv_rssi_dis_trig = 0;
  76 +                                               ieee80211_node_leave(ni);
  77 +                                               return 0;
  78 +                                       }
  79 +                               } else {
  80 +                                       vap->iv_rssi_dis_trig = 0;
  81 +                               }
  82 +                       }
  83                         if ((rssi < vap->iv_bgscanthr) &&
  84                                         (!vap->iv_bgscanthr_next ||
  85                                                 !time_before(jiffies, vap->iv_bgscanthr_next)) &&
  86 Index: madwifi-trunk-r3776/net80211/ieee80211_var.h
  87 ===================================================================
  88 --- madwifi-trunk-r3776.orig/net80211/ieee80211_var.h   2008-07-17 04:07:08.000000000 +0200
  89 +++ madwifi-trunk-r3776/net80211/ieee80211_var.h        2008-07-17 04:07:10.000000000 +0200
  90 @@ -233,6 +233,9 @@
  91         u_int iv_bgscanintvl;                           /* bg scan min interval */
  92         u_int iv_bgscanthr;                                     /* bg scan rssi threshold */
  93         u_int iv_bgscantrintvl;                         /* bg scan trigger interval */
  94 +       u_int iv_rssi_dis_thr;                          /* rssi disassoc threshold */
  95 +       u_int iv_rssi_dis_max;                          /* max beacons below disconnect threshold */
  96 +       u_int iv_rssi_dis_trig;                         /* rssi disassoc trigger count */
  97         unsigned long iv_bgscanthr_next;                /* last trigger for bgscan */
  98         u_int iv_scanvalid;                             /* scan cache valid threshold */
  99         struct ieee80211_roam iv_roam;                  /* sta-mode roaming state */