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