utils.c revision 8d520ff1dc2da35cdca849e982051b86468016d8 
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 *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
46struct prune_data {
47	struct hostapd_data *hapd;
48	const u8 *addr;
49};
50
51static 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 */
80void 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}
89