src/ap/utils.c

   1 /*
   2  * AP mode helper functions
   3  * Copyright (c) 2009, Jouni Malinen <j@w1.fi>
   4  *
   5  * This software may be distributed under the terms of the BSD license.
   6  * See README for more details.
   7  */
   8
   9 #include "includes.h"
  10
  11 #include "common.h"
  12 #include "common/ieee802_11_defs.h"
  13 #include "fst/fst.h"
  14 #include "sta_info.h"
  15 #include "hostapd.h"
  16
  17
  18 int hostapd_register_probereq_cb(struct hostapd_data *hapd,
  19                                  int (*cb)(void *ctx, const u8 *sa,
  20                                            const u8 *da, const u8 *bssid,
  21                                            const u8 *ie, size_t ie_len,
  22                                            int ssi_signal),
  23                                  void *ctx)
  24 {
  25         struct hostapd_probereq_cb *n;
  26
  27         n = os_realloc_array(hapd->probereq_cb, hapd->num_probereq_cb + 1,
  28                              sizeof(struct hostapd_probereq_cb));
  29         if (n == NULL)
  30                 return -1;
  31
  32         hapd->probereq_cb = n;
  33         n = &hapd->probereq_cb[hapd->num_probereq_cb];
  34         hapd->num_probereq_cb++;
  35
  36         n->cb = cb;
  37         n->ctx = ctx;
  38
  39         return 0;
  40 }
  41
  42
  43 struct prune_data {
  44         struct hostapd_data *hapd;
  45         const u8 *addr;
  46 };
  47
  48 static int prune_associations(struct hostapd_iface *iface, void *ctx)
  49 {
  50         struct prune_data *data = ctx;
  51         struct sta_info *osta;
  52         struct hostapd_data *ohapd;
  53         size_t j;
  54
  55         for (j = 0; j < iface->num_bss; j++) {
  56                 ohapd = iface->bss[j];
  57                 if (ohapd == data->hapd)
  58                         continue;
  59 #ifdef CONFIG_FST
  60                 /* Don't prune STAs belong to same FST */
  61                 if (ohapd->iface->fst &&
  62                     data->hapd->iface->fst &&
  63                     fst_are_ifaces_aggregated(ohapd->iface->fst,
  64                                               data->hapd->iface->fst))
  65                         continue;
  66 #endif /* CONFIG_FST */
  67                 osta = ap_get_sta(ohapd, data->addr);
  68                 if (!osta)
  69                         continue;
  70
  71                 wpa_printf(MSG_INFO, "%s: Prune association for " MACSTR,
  72                            ohapd->conf->iface, MAC2STR(osta->addr));
  73                 ap_sta_disassociate(ohapd, osta, WLAN_REASON_UNSPECIFIED);
  74         }
  75
  76         return 0;
  77 }
  78
  79 /**
  80  * hostapd_prune_associations - Remove extraneous associations
  81  * @hapd: Pointer to BSS data for the most recent association
  82  * @addr: Associated STA address
  83  *
  84  * This function looks through all radios and BSS's for previous
  85  * (stale) associations of STA. If any are found they are removed.
  86  */
  87 void hostapd_prune_associations(struct hostapd_data *hapd, const u8 *addr)
  88 {
  89         struct prune_data data;
  90         data.hapd = hapd;
  91         data.addr = addr;
  92         if (hapd->iface->interfaces &&
  93             hapd->iface->interfaces->for_each_interface)
  94                 hapd->iface->interfaces->for_each_interface(
  95                         hapd->iface->interfaces, prune_associations, &data);
  96 }