workbench/network/WirelessManager/src/ap/utils.c

   1 /*
   2  * AP mode helper functions
   3  * Copyright (c) 2009, Jouni Malinen <j@w1.fi>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  */
  14
  15 #include "includes.h"
  16
  17 #include "common.h"
  18 #include "common/ieee802_11_defs.h"
  19 #include "sta_info.h"
  20 #include "hostapd.h"
  21
  22
  23 int hostapd_register_probereq_cb(struct hostapd_data *hapd,
  24                                  int (*cb)(void *ctx, const u8 *sa,
  25                                            const u8 *ie, size_t ie_len),
  26                                  void *ctx)
  27 {
  28         struct hostapd_probereq_cb *n;
  29
  30         n = os_realloc(hapd->probereq_cb, (hapd->num_probereq_cb + 1) *
  31                        sizeof(struct hostapd_probereq_cb));
  32         if (n == NULL)
  33                 return -1;
  34
  35         hapd->probereq_cb = n;
  36         n = &hapd->probereq_cb[hapd->num_probereq_cb];
  37         hapd->num_probereq_cb++;
  38
  39         n->cb = cb;
  40         n->ctx = ctx;
  41
  42         return 0;
  43 }
  44
  45
  46 struct prune_data {
  47         struct hostapd_data *hapd;
  48         const u8 *addr;
  49 };
  50
  51 static int prune_associations(struct hostapd_iface *iface, void *ctx)
  52 {
  53         struct prune_data *data = ctx;
  54         struct sta_info *osta;
  55         struct hostapd_data *ohapd;
  56         size_t j;
  57
  58         for (j = 0; j < iface->num_bss; j++) {
  59                 ohapd = iface->bss[j];
  60                 if (ohapd == data->hapd)
  61                         continue;
  62                 osta = ap_get_sta(ohapd, data->addr);
  63                 if (!osta)
  64                         continue;
  65
  66                 ap_sta_disassociate(ohapd, osta, WLAN_REASON_UNSPECIFIED);
  67         }
  68
  69         return 0;
  70 }
  71
  72 /**
  73  * hostapd_prune_associations - Remove extraneous associations
  74  * @hapd: Pointer to BSS data for the most recent association
  75  * @addr: Associated STA address
  76  *
  77  * This function looks through all radios and BSS's for previous
  78  * (stale) associations of STA. If any are found they are removed.
  79  */
  80 void hostapd_prune_associations(struct hostapd_data *hapd, const u8 *addr)
  81 {
  82         struct prune_data data;
  83         data.hapd = hapd;
  84         data.addr = addr;
  85         if (hapd->iface->for_each_interface)
  86                 hapd->iface->for_each_interface(hapd->iface->interfaces,
  87                                                 prune_associations, &data);
  88 }