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 @@ -2621,7 +2621,7 @@ 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 @@ -2630,7 +2630,10 @@ 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 @@ -2757,7 +2760,7 @@ static void ibss_mesh_select_40mhz(struc
  39                                    const struct wpa_ssid *ssid,
  40                                    struct hostapd_hw_modes *mode,
  41                                    struct hostapd_freq_params *freq,
  42 -                                  int obss_scan) {
  43 +                                  int obss_scan, bool dfs_enabled) {
  44         int chan_idx;
  45         struct hostapd_channel_data *pri_chan = NULL, *sec_chan = NULL;
  46         int i, res;
  47 @@ -2781,8 +2784,11 @@ static void ibss_mesh_select_40mhz(struc
  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  #ifdef CONFIG_HT_OVERRIDES
  59         if (ssid->disable_ht40)
  60 @@ -2808,8 +2814,11 @@ static void ibss_mesh_select_40mhz(struc
  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 @@ -2863,7 +2872,7 @@ static bool ibss_mesh_select_80_160mhz(s
  74                                        const struct wpa_ssid *ssid,
  75                                        struct hostapd_hw_modes *mode,
  76                                        struct hostapd_freq_params *freq,
  77 -                                      int ieee80211_mode, bool is_6ghz) {
  78 +                                      int ieee80211_mode, bool is_6ghz, bool dfs_enabled) {
  79         static const int bw80[] = {
  80                 5180, 5260, 5500, 5580, 5660, 5745, 5825,
  81                 5955, 6035, 6115, 6195, 6275, 6355, 6435,
  82 @@ -2908,7 +2917,7 @@ static bool ibss_mesh_select_80_160mhz(s
  83                 goto skip_80mhz;
  84
  85         /* Use 40 MHz if channel not usable */
  86 -       if (!ibss_mesh_is_80mhz_avail(channel, mode))
  87 +       if (!ibss_mesh_is_80mhz_avail(channel, mode, dfs_enabled))
  88                 goto skip_80mhz;
  89
  90         chwidth = CONF_OPER_CHWIDTH_80MHZ;
  91 @@ -2922,7 +2931,7 @@ static bool ibss_mesh_select_80_160mhz(s
  92         if ((mode->he_capab[ieee80211_mode].phy_cap[
  93                      HE_PHYCAP_CHANNEL_WIDTH_SET_IDX] &
  94              HE_PHYCAP_CHANNEL_WIDTH_SET_160MHZ_IN_5G) && is_6ghz &&
  95 -           ibss_mesh_is_80mhz_avail(channel + 16, mode)) {
  96 +           ibss_mesh_is_80mhz_avail(channel + 16, mode, dfs_enabled)) {
  97                 for (j = 0; j < ARRAY_SIZE(bw160); j++) {
  98                         if (freq->freq == bw160[j]) {
  99                                 chwidth = CONF_OPER_CHWIDTH_160MHZ;
 100 @@ -2950,10 +2959,12 @@ static bool ibss_mesh_select_80_160mhz(s
 101                                 if (!chan)
 102                                         continue;
 103
 104 -                               if (chan->flag & (HOSTAPD_CHAN_DISABLED |
 105 -                                                 HOSTAPD_CHAN_NO_IR |
 106 -                                                 HOSTAPD_CHAN_RADAR))
 107 +                               if (chan->flag & HOSTAPD_CHAN_DISABLED)
 108                                         continue;
 109 +                               if (chan->flag & (HOSTAPD_CHAN_RADAR |
 110 +                                                 HOSTAPD_CHAN_NO_IR))
 111 +                                       if (!dfs_enabled)
 112 +                                               continue;
 113
 114                                 /* Found a suitable second segment for 80+80 */
 115                                 chwidth = CONF_OPER_CHWIDTH_80P80MHZ;
 116 @@ -3008,6 +3019,7 @@ void ibss_mesh_setup_freq(struct wpa_sup
 117         int i, obss_scan = 1;
 118         u8 channel;
 119         bool is_6ghz;
 120 +       bool dfs_enabled = wpa_s->conf->country[0] && (wpa_s->drv_flags & WPA_DRIVER_FLAGS_RADAR);
 121
 122         freq->freq = ssid->frequency;
 123
 124 @@ -3053,9 +3065,9 @@ void ibss_mesh_setup_freq(struct wpa_sup
 125         freq->channel = channel;
 126         /* Setup higher BW only for 5 GHz */
 127         if (mode->mode == HOSTAPD_MODE_IEEE80211A) {
 128 -               ibss_mesh_select_40mhz(wpa_s, ssid, mode, freq, obss_scan);
 129 +               ibss_mesh_select_40mhz(wpa_s, ssid, mode, freq, obss_scan, dfs_enabled);
 130                 if (!ibss_mesh_select_80_160mhz(wpa_s, ssid, mode, freq,
 131 -                                               ieee80211_mode, is_6ghz))
 132 +                                               ieee80211_mode, is_6ghz, dfs_enabled))
 133                         freq->he_enabled = freq->vht_enabled = false;
 134         }
 135