utils.c revision c5ec7f57ead87efa365800228aa0b09a12d9e6c4 
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 "sta_info.h"
14#include "hostapd.h"
15
16
17int hostapd_register_probereq_cb(struct hostapd_data *hapd,
18				 int (*cb)(void *ctx, const u8 *sa,
19					   const u8 *da, const u8 *bssid,
20					   const u8 *ie, size_t ie_len),
21				 void *ctx)
22{
23	struct hostapd_probereq_cb *n;
24
25	n = os_realloc(hapd->probereq_cb, (hapd->num_probereq_cb + 1) *
26		       sizeof(struct hostapd_probereq_cb));
27	if (n == NULL)
28		return -1;
29
30	hapd->probereq_cb = n;
31	n = &hapd->probereq_cb[hapd->num_probereq_cb];
32	hapd->num_probereq_cb++;
33
34	n->cb = cb;
35	n->ctx = ctx;
36
37	return 0;
38}
39
40
41struct prune_data {
42	struct hostapd_data *hapd;
43	const u8 *addr;
44};
45
46static int prune_associations(struct hostapd_iface *iface, void *ctx)
47{
48	struct prune_data *data = ctx;
49	struct sta_info *osta;
50	struct hostapd_data *ohapd;
51	size_t j;
52
53	for (j = 0; j < iface->num_bss; j++) {
54		ohapd = iface->bss[j];
55		if (ohapd == data->hapd)
56			continue;
57		osta = ap_get_sta(ohapd, data->addr);
58		if (!osta)
59			continue;
60
61		ap_sta_disassociate(ohapd, osta, WLAN_REASON_UNSPECIFIED);
62	}
63
64	return 0;
65}
66
67/**
68 * hostapd_prune_associations - Remove extraneous associations
69 * @hapd: Pointer to BSS data for the most recent association
70 * @addr: Associated STA address
71 *
72 * This function looks through all radios and BSS's for previous
73 * (stale) associations of STA. If any are found they are removed.
74 */
75void hostapd_prune_associations(struct hostapd_data *hapd, const u8 *addr)
76{
77	struct prune_data data;
78	data.hapd = hapd;
79	data.addr = addr;
80	if (hapd->iface->for_each_interface)
81		hapd->iface->for_each_interface(hapd->iface->interfaces,
82						prune_associations, &data);
83}
84