package/network/services/hostapd/patches/720-iface_max_num_sta.patch

   1 From: Felix Fietkau <nbd@nbd.name>
   2 Date: Wed, 26 May 2021 14:34:46 +0200
   3 Subject: [PATCH] hostapd: add support for specifying the maxassoc parameter as
   4  a device option
   5
   6 It allows enforcing a limit on associated stations to be enforced for the
   7 full device, e.g. in order to deal with hardware/driver limitations
   8
   9 --- a/hostapd/config_file.c
  10 +++ b/hostapd/config_file.c
  11 @@ -3041,6 +3041,14 @@ static int hostapd_config_fill(struct ho
  12                                    line, bss->max_num_sta, MAX_STA_COUNT);
  13                         return 1;
  14                 }
  15 +       } else if (os_strcmp(buf, "iface_max_num_sta") == 0) {
  16 +               conf->max_num_sta = atoi(pos);
  17 +               if (conf->max_num_sta < 0 ||
  18 +                   conf->max_num_sta > MAX_STA_COUNT) {
  19 +                       wpa_printf(MSG_ERROR, "Line %d: Invalid max_num_sta=%d; allowed range 0..%d",
  20 +                                  line, conf->max_num_sta, MAX_STA_COUNT);
  21 +                       return 1;
  22 +               }
  23         } else if (os_strcmp(buf, "wpa") == 0) {
  24                 bss->wpa = atoi(pos);
  25         } else if (os_strcmp(buf, "extended_key_id") == 0) {
  26 --- a/src/ap/ap_config.h
  27 +++ b/src/ap/ap_config.h
  28 @@ -1057,6 +1057,8 @@ struct hostapd_config {
  29         unsigned int track_sta_max_num;
  30         unsigned int track_sta_max_age;
  31
  32 +       int max_num_sta;
  33 +
  34         char country[3]; /* first two octets: country code as described in
  35                           * ISO/IEC 3166-1. Third octet:
  36                           * ' ' (ascii 32): all environments
  37 --- a/src/ap/beacon.c
  38 +++ b/src/ap/beacon.c
  39 @@ -1567,7 +1567,7 @@ void handle_probe_req(struct hostapd_dat
  40         if (hapd->conf->no_probe_resp_if_max_sta &&
  41             is_multicast_ether_addr(mgmt->da) &&
  42             is_multicast_ether_addr(mgmt->bssid) &&
  43 -           hapd->num_sta >= hapd->conf->max_num_sta &&
  44 +           hostapd_check_max_sta(hapd) &&
  45             !ap_get_sta(hapd, mgmt->sa)) {
  46                 wpa_printf(MSG_MSGDUMP, "%s: Ignore Probe Request from " MACSTR
  47                            " since no room for additional STA",
  48 --- a/src/ap/hostapd.c
  49 +++ b/src/ap/hostapd.c
  50 @@ -247,6 +247,29 @@ static int hostapd_iface_conf_changed(st
  51         return 0;
  52  }
  53
  54 +static inline int hostapd_iface_num_sta(struct hostapd_iface *iface)
  55 +{
  56 +       int num_sta = 0;
  57 +       int i;
  58 +
  59 +       for (i = 0; i < iface->num_bss; i++)
  60 +               num_sta += iface->bss[i]->num_sta;
  61 +
  62 +       return num_sta;
  63 +}
  64 +
  65 +
  66 +int hostapd_check_max_sta(struct hostapd_data *hapd)
  67 +{
  68 +       if (hapd->num_sta >= hapd->conf->max_num_sta)
  69 +               return 1;
  70 +
  71 +       if (hapd->iconf->max_num_sta &&
  72 +           hostapd_iface_num_sta(hapd->iface) >= hapd->iconf->max_num_sta)
  73 +               return 1;
  74 +
  75 +       return 0;
  76 +}
  77
  78  int hostapd_reload_config(struct hostapd_iface *iface)
  79  {
  80 --- a/src/ap/hostapd.h
  81 +++ b/src/ap/hostapd.h
  82 @@ -754,6 +754,7 @@ void hostapd_cleanup_cs_params(struct ho
  83  void hostapd_periodic_iface(struct hostapd_iface *iface);
  84  int hostapd_owe_trans_get_info(struct hostapd_data *hapd);
  85  void hostapd_ocv_check_csa_sa_query(void *eloop_ctx, void *timeout_ctx);
  86 +int hostapd_check_max_sta(struct hostapd_data *hapd);
  87
  88  void hostapd_switch_color(struct hostapd_data *hapd, u64 bitmap);
  89  void hostapd_cleanup_cca_params(struct hostapd_data *hapd);