utils.c revision 1f69aa52ea2e0a73ac502565df8c666ee49cab6a 
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
23int hostapd_register_probereq_cb(struct hostapd_data *hapd,
24				 int (*cb)(void *ctx, const u8 *sa,
25					   const u8 *da, const u8 *bssid,
26					   const u8 *ie, size_t ie_len),
27				 void *ctx)
28{
29	struct hostapd_probereq_cb *n;
30
31	n = os_realloc(hapd->probereq_cb, (hapd->num_probereq_cb + 1) *
32		       sizeof(struct hostapd_probereq_cb));
33	if (n == NULL)
34		return -1;
35
36	hapd->probereq_cb = n;
37	n = &hapd->probereq_cb[hapd->num_probereq_cb];
38	hapd->num_probereq_cb++;
39
40	n->cb = cb;
41	n->ctx = ctx;
42
43	return 0;
44}
45
46
47struct prune_data {
48	struct hostapd_data *hapd;
49	const u8 *addr;
50};
51
52static int prune_associations(struct hostapd_iface *iface, void *ctx)
53{
54	struct prune_data *data = ctx;
55	struct sta_info *osta;
56	struct hostapd_data *ohapd;
57	size_t j;
58
59	for (j = 0; j < iface->num_bss; j++) {
60		ohapd = iface->bss[j];
61		if (ohapd == data->hapd)
62			continue;
63		osta = ap_get_sta(ohapd, data->addr);
64		if (!osta)
65			continue;
66
67		ap_sta_disassociate(ohapd, osta, WLAN_REASON_UNSPECIFIED);
68	}
69
70	return 0;
71}
72
73/**
74 * hostapd_prune_associations - Remove extraneous associations
75 * @hapd: Pointer to BSS data for the most recent association
76 * @addr: Associated STA address
77 *
78 * This function looks through all radios and BSS's for previous
79 * (stale) associations of STA. If any are found they are removed.
80 */
81void hostapd_prune_associations(struct hostapd_data *hapd, const u8 *addr)
82{
83	struct prune_data data;
84	data.hapd = hapd;
85	data.addr = addr;
86	if (hapd->iface->for_each_interface)
87		hapd->iface->for_each_interface(hapd->iface->interfaces,
88						prune_associations, &data);
89}
90