package/network/services/hostapd/patches/010-mesh-Allow-DFS-channels-to-be-selected-if-dfs-is-ena.patch

   1 From 8de8cd8380af0c43d4fde67a668d79ef73b26b26 Mon Sep 17 00:00:00 2001
   2 From: Peter Oh <peter.oh@bowerswilkins.com>
   3 Date: Tue, 30 Jun 2020 14:18:58 +0200
   4 Subject: [PATCH 10/19] mesh: Allow DFS channels to be selected if dfs is
   5  enabled
   6
   7 Note: DFS is assumed to be usable if a country code has been set
   8
   9 Signed-off-by: Benjamin Berg <benjamin@sipsolutions.net>
  10 Signed-off-by: Peter Oh <peter.oh@bowerswilkins.com>
  11 ---
  12  wpa_supplicant/wpa_supplicant.c | 25 +++++++++++++++++++------
  13  1 file changed, 19 insertions(+), 6 deletions(-)
  14
  15 --- a/wpa_supplicant/wpa_supplicant.c
  16 +++ b/wpa_supplicant/wpa_supplicant.c
  17 @@ -2436,7 +2436,7 @@ static int drv_supports_vht(struct wpa_s
  18  }
  19
  20
  21 -static bool ibss_mesh_is_80mhz_avail(int channel, struct hostapd_hw_modes *mode)
  22 +static bool ibss_mesh_is_80mhz_avail(int channel, struct hostapd_hw_modes *mode, bool dfs_enabled)
  23  {
  24         int i;
  25
  26 @@ -2445,7 +2445,10 @@ static bool ibss_mesh_is_80mhz_avail(int
  27
  28                 chan = hw_get_channel_chan(mode, i, NULL);
  29                 if (!chan ||
  30 -                   chan->flag & (HOSTAPD_CHAN_DISABLED | HOSTAPD_CHAN_NO_IR))
  31 +                   chan->flag & HOSTAPD_CHAN_DISABLED)
  32 +                       return false;
  33 +
  34 +               if (!dfs_enabled && chan->flag & (HOSTAPD_CHAN_RADAR | HOSTAPD_CHAN_NO_IR))
  35                         return false;
  36         }
  37
  38 @@ -2474,6 +2477,8 @@ void ibss_mesh_setup_freq(struct wpa_sup
  39         int chwidth, seg0, seg1;
  40         u32 vht_caps = 0;
  41         bool is_24ghz, is_6ghz;
  42 +       bool dfs_enabled = wpa_s->conf->country[0] &&
  43 +                          (wpa_s->drv_flags & WPA_DRIVER_FLAGS_RADAR);
  44
  45         freq->freq = ssid->frequency;
  46
  47 @@ -2570,8 +2575,11 @@ void ibss_mesh_setup_freq(struct wpa_sup
  48                 return;
  49
  50         /* Check primary channel flags */
  51 -       if (pri_chan->flag & (HOSTAPD_CHAN_DISABLED | HOSTAPD_CHAN_NO_IR))
  52 +       if (pri_chan->flag & HOSTAPD_CHAN_DISABLED)
  53                 return;
  54 +       if (pri_chan->flag & (HOSTAPD_CHAN_RADAR | HOSTAPD_CHAN_NO_IR))
  55 +               if (!dfs_enabled)
  56 +                       return;
  57
  58         freq->channel = pri_chan->chan;
  59
  60 @@ -2604,8 +2612,11 @@ void ibss_mesh_setup_freq(struct wpa_sup
  61                 return;
  62
  63         /* Check secondary channel flags */
  64 -       if (sec_chan->flag & (HOSTAPD_CHAN_DISABLED | HOSTAPD_CHAN_NO_IR))
  65 +       if (sec_chan->flag & HOSTAPD_CHAN_DISABLED)
  66                 return;
  67 +       if (sec_chan->flag & (HOSTAPD_CHAN_RADAR | HOSTAPD_CHAN_NO_IR))
  68 +               if (!dfs_enabled)
  69 +                       return;
  70
  71         if (ht40 == -1) {
  72                 if (!(pri_chan->flag & HOSTAPD_CHAN_HT40MINUS))
  73 @@ -2694,7 +2705,7 @@ skip_to_6ghz:
  74                 return;
  75
  76         /* Back to HT configuration if channel not usable */
  77 -       if (!ibss_mesh_is_80mhz_avail(channel, mode))
  78 +       if (!ibss_mesh_is_80mhz_avail(channel, mode, dfs_enabled))
  79                 return;
  80
  81         chwidth = CONF_OPER_CHWIDTH_80MHZ;
  82 @@ -2708,7 +2719,7 @@ skip_to_6ghz:
  83                  * above; check the remaining four 20 MHz channels for the total
  84                  * of 160 MHz bandwidth.
  85                  */
  86 -               if (!ibss_mesh_is_80mhz_avail(channel + 16, mode))
  87 +               if (!ibss_mesh_is_80mhz_avail(channel + 16, mode, dfs_enabled))
  88                         return;
  89
  90                 for (j = 0; j < ARRAY_SIZE(bw160); j++) {
  91 @@ -2738,10 +2749,12 @@ skip_to_6ghz:
  92                                 if (!chan)
  93                                         continue;
  94
  95 -                               if (chan->flag & (HOSTAPD_CHAN_DISABLED |
  96 -                                                 HOSTAPD_CHAN_NO_IR |
  97 -                                                 HOSTAPD_CHAN_RADAR))
  98 +                               if (chan->flag & HOSTAPD_CHAN_DISABLED)
  99                                         continue;
 100 +                               if (chan->flag & (HOSTAPD_CHAN_RADAR |
 101 +                                                 HOSTAPD_CHAN_NO_IR))
 102 +                                       if (!dfs_enabled)
 103 +                                               continue;
 104
 105                                 /* Found a suitable second segment for 80+80 */
 106                                 chwidth = CONF_OPER_CHWIDTH_80P80MHZ;