package/hostapd/patches/800-dynamic_20_40_mhz.patch

   1 --- a/hostapd/config_file.c
   2 +++ b/hostapd/config_file.c
   3 @@ -1901,6 +1901,10 @@ struct hostapd_config * hostapd_config_r
   4                                            "ht_capab", line);
   5                                 errors++;
   6                         }
   7 +               } else if (os_strcmp(buf, "dynamic_ht40") == 0) {
   8 +                       conf->dynamic_ht40 = atoi(pos);
   9 +                       if (conf->dynamic_ht40 == 1)
  10 +                               conf->dynamic_ht40 = 1500;
  11                 } else if (os_strcmp(buf, "require_ht") == 0) {
  12                         conf->require_ht = atoi(pos);
  13  #endif /* CONFIG_IEEE80211N */
  14 --- a/src/ap/ap_config.h
  15 +++ b/src/ap/ap_config.h
  16 @@ -394,6 +394,7 @@ struct hostapd_config {
  17         int ieee80211n;
  18         int secondary_channel;
  19         int require_ht;
  20 +       int dynamic_ht40;
  21  };
  22
  23
  24 --- a/src/ap/hostapd.c
  25 +++ b/src/ap/hostapd.c
  26 @@ -27,6 +27,7 @@
  27  #include "beacon.h"
  28  #include "iapp.h"
  29  #include "ieee802_1x.h"
  30 +#include "ieee802_11.h"
  31  #include "ieee802_11_auth.h"
  32  #include "vlan_init.h"
  33  #include "wpa_auth.h"
  34 @@ -285,6 +286,7 @@ static void hostapd_cleanup_iface_pre(st
  35   */
  36  static void hostapd_cleanup_iface(struct hostapd_iface *iface)
  37  {
  38 +       hostapd_deinit_ht(iface);
  39         hostapd_free_hw_features(iface->hw_features, iface->num_hw_features);
  40         iface->hw_features = NULL;
  41         os_free(iface->current_rates);
  42 --- a/src/ap/hostapd.h
  43 +++ b/src/ap/hostapd.h
  44 @@ -220,6 +220,9 @@ struct hostapd_iface {
  45         /* Overlapping BSS information */
  46         int olbc_ht;
  47
  48 +       int force_20mhz;
  49 +       struct os_time last_20mhz_trigger;
  50 +
  51         u16 ht_op_mode;
  52         void (*scan_cb)(struct hostapd_iface *iface);
  53
  54 --- a/src/ap/ieee802_11.c
  55 +++ b/src/ap/ieee802_11.c
  56 @@ -1242,6 +1242,9 @@ static void handle_beacon(struct hostapd
  57                                              sizeof(mgmt->u.beacon)), &elems,
  58                                       0);
  59
  60 +       if (!elems.ht_capabilities)
  61 +               hostapd_trigger_20mhz(hapd->iface);
  62 +
  63         ap_list_process_beacon(hapd->iface, mgmt, &elems, fi);
  64  }
  65
  66 --- a/src/ap/ieee802_11.h
  67 +++ b/src/ap/ieee802_11.h
  68 @@ -65,4 +65,17 @@ void hostapd_tx_status(struct hostapd_da
  69  void ieee802_11_rx_from_unknown(struct hostapd_data *hapd, const u8 *src,
  70                                 int wds);
  71
  72 +#ifdef CONFIG_IEEE80211N
  73 +void hostapd_trigger_20mhz(struct hostapd_iface *iface);
  74 +void hostapd_deinit_ht(struct hostapd_iface *iface);
  75 +
  76 +#else
  77 +static inline void hostapd_deinit_ht(struct hostapd_iface *iface)
  78 +{
  79 +}
  80 +static inline void hostapd_trigger_20mhz(struct hostapd_iface *iface)
  81 +{
  82 +}
  83 +#endif /* CONFIG_IEEE80211N */
  84 +
  85  #endif /* IEEE802_11_H */
  86 --- a/src/ap/ieee802_11_ht.c
  87 +++ b/src/ap/ieee802_11_ht.c
  88 @@ -20,9 +20,11 @@
  89  #include "drivers/driver.h"
  90  #include "hostapd.h"
  91  #include "ap_config.h"
  92 +#include "ap_drv_ops.h"
  93  #include "sta_info.h"
  94  #include "beacon.h"
  95  #include "ieee802_11.h"
  96 +#include "utils/eloop.h"
  97
  98
  99  u8 * hostapd_eid_ht_capabilities(struct hostapd_data *hapd, u8 *eid)
 100 @@ -70,12 +72,15 @@ u8 * hostapd_eid_ht_operation(struct hos
 101
 102         oper->control_chan = hapd->iconf->channel;
 103         oper->operation_mode = host_to_le16(hapd->iface->ht_op_mode);
 104 -       if (hapd->iconf->secondary_channel == 1)
 105 -               oper->ht_param |= HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE |
 106 -                       HT_INFO_HT_PARAM_REC_TRANS_CHNL_WIDTH;
 107 -       if (hapd->iconf->secondary_channel == -1)
 108 -               oper->ht_param |= HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW |
 109 -                       HT_INFO_HT_PARAM_REC_TRANS_CHNL_WIDTH;
 110 +
 111 +       if (!hapd->iface->force_20mhz) {
 112 +               if (hapd->iconf->secondary_channel == 1)
 113 +                       oper->ht_param |= HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE |
 114 +                               HT_INFO_HT_PARAM_REC_TRANS_CHNL_WIDTH;
 115 +               if (hapd->iconf->secondary_channel == -1)
 116 +                       oper->ht_param |= HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW |
 117 +                               HT_INFO_HT_PARAM_REC_TRANS_CHNL_WIDTH;
 118 +       }
 119
 120         pos += sizeof(*oper);
 121
 122 @@ -265,3 +270,80 @@ void hostapd_get_ht_capab(struct hostapd
 123
 124         neg_ht_cap->ht_capabilities_info = host_to_le16(cap);
 125  }
 126 +
 127 +static void hostapd_set_force_20mhz(struct hostapd_iface *iface);
 128 +
 129 +static void hostapd_restore_40mhz(void *eloop_data, void *user_ctx)
 130 +{
 131 +       struct hostapd_iface *iface = eloop_data;
 132 +       struct os_time time;
 133 +       int timeout;
 134 +
 135 +       if (!iface->last_20mhz_trigger.sec)
 136 +           return;
 137 +
 138 +       os_get_time(&time);
 139 +       timeout = iface->last_20mhz_trigger.sec + iface->conf->dynamic_ht40 -
 140 +                 time.sec;
 141 +
 142 +       if (timeout > 0) {
 143 +               eloop_register_timeout(timeout, 0, hostapd_restore_40mhz,
 144 +                                      iface, NULL);
 145 +               return;
 146 +       }
 147 +
 148 +       iface->last_20mhz_trigger.sec = 0;
 149 +       iface->last_20mhz_trigger.usec = 0;
 150 +
 151 +       iface->force_20mhz = 0;
 152 +       hostapd_set_force_20mhz(iface);
 153 +}
 154 +
 155 +static void hostapd_set_force_20mhz(struct hostapd_iface *iface)
 156 +{
 157 +       int secondary_channel;
 158 +       int i;
 159 +
 160 +       ieee802_11_set_beacons(iface);
 161 +
 162 +       for (i = 0; i < iface->num_bss; i++) {
 163 +               struct hostapd_data *hapd = iface->bss[i];
 164 +
 165 +               if (iface->force_20mhz)
 166 +                       secondary_channel = 0;
 167 +               else
 168 +                       secondary_channel = hapd->iconf->secondary_channel;
 169 +
 170 +               if (hostapd_set_freq(hapd, hapd->iconf->hw_mode, iface->freq,
 171 +                                        hapd->iconf->channel,
 172 +                                        hapd->iconf->ieee80211n,
 173 +                                        secondary_channel)) {
 174 +                       wpa_printf(MSG_ERROR, "Could not set channel for "
 175 +                                  "kernel driver");
 176 +               }
 177 +       }
 178 +}
 179 +
 180 +void hostapd_deinit_ht(struct hostapd_iface *iface)
 181 +{
 182 +       eloop_cancel_timeout(hostapd_restore_40mhz, iface, NULL);
 183 +}
 184 +
 185 +void hostapd_trigger_20mhz(struct hostapd_iface *iface)
 186 +{
 187 +       if (!iface->conf->dynamic_ht40)
 188 +               return;
 189 +
 190 +       if (!iface->force_20mhz) {
 191 +               iface->force_20mhz = 1;
 192 +               hostapd_set_force_20mhz(iface);
 193 +       }
 194 +
 195 +       if (!iface->last_20mhz_trigger.sec) {
 196 +               eloop_cancel_timeout(hostapd_restore_40mhz, iface, NULL);
 197 +               eloop_register_timeout(iface->conf->dynamic_ht40, 0,
 198 +                                      hostapd_restore_40mhz, iface, NULL);
 199 +       }
 200 +
 201 +       os_get_time(&iface->last_20mhz_trigger);
 202 +}