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      1 /*
      2  * AP mode helper functions
      3  * Copyright (c) 2009, Jouni Malinen <j (at) 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 "fst/fst.h"
     14 #include "sta_info.h"
     15 #include "hostapd.h"
     16 
     17 
     18 int hostapd_register_probereq_cb(struct hostapd_data *hapd,
     19 				 int (*cb)(void *ctx, const u8 *sa,
     20 					   const u8 *da, const u8 *bssid,
     21 					   const u8 *ie, size_t ie_len,
     22 					   int ssi_signal),
     23 				 void *ctx)
     24 {
     25 	struct hostapd_probereq_cb *n;
     26 
     27 	n = os_realloc_array(hapd->probereq_cb, hapd->num_probereq_cb + 1,
     28 			     sizeof(struct hostapd_probereq_cb));
     29 	if (n == NULL)
     30 		return -1;
     31 
     32 	hapd->probereq_cb = n;
     33 	n = &hapd->probereq_cb[hapd->num_probereq_cb];
     34 	hapd->num_probereq_cb++;
     35 
     36 	n->cb = cb;
     37 	n->ctx = ctx;
     38 
     39 	return 0;
     40 }
     41 
     42 
     43 struct prune_data {
     44 	struct hostapd_data *hapd;
     45 	const u8 *addr;
     46 	int mld_assoc_link_id;
     47 };
     48 
     49 static int prune_associations(struct hostapd_iface *iface, void *ctx)
     50 {
     51 	struct prune_data *data = ctx;
     52 	struct sta_info *osta;
     53 	struct hostapd_data *ohapd;
     54 	size_t j;
     55 
     56 	for (j = 0; j < iface->num_bss; j++) {
     57 		ohapd = iface->bss[j];
     58 		if (ohapd == data->hapd)
     59 			continue;
     60 #ifdef CONFIG_TESTING_OPTIONS
     61 		if (ohapd->conf->skip_prune_assoc)
     62 			continue;
     63 #endif /* CONFIG_TESTING_OPTIONS */
     64 #ifdef CONFIG_FST
     65 		/* Don't prune STAs belong to same FST */
     66 		if (ohapd->iface->fst &&
     67 		    data->hapd->iface->fst &&
     68 		    fst_are_ifaces_aggregated(ohapd->iface->fst,
     69 					      data->hapd->iface->fst))
     70 			continue;
     71 #endif /* CONFIG_FST */
     72 		osta = ap_get_sta(ohapd, data->addr);
     73 		if (!osta)
     74 			continue;
     75 
     76 #ifdef CONFIG_IEEE80211BE
     77 		if (data->mld_assoc_link_id >= 0 &&
     78 		    osta->mld_assoc_link_id == data->mld_assoc_link_id)
     79 			continue;
     80 #endif /* CONFIG_IEEE80211BE */
     81 
     82 		wpa_printf(MSG_INFO, "%s: Prune association for " MACSTR,
     83 			   ohapd->conf->iface, MAC2STR(osta->addr));
     84 		ap_sta_disassociate(ohapd, osta, WLAN_REASON_UNSPECIFIED);
     85 	}
     86 
     87 	return 0;
     88 }
     89 
     90 /**
     91  * hostapd_prune_associations - Remove extraneous associations
     92  * @hapd: Pointer to BSS data for the most recent association
     93  * @addr: Associated STA address
     94  * @mld_assoc_link_id: MLD link id used for association or -1 for non MLO
     95  *
     96  * This function looks through all radios and BSS's for previous
     97  * (stale) associations of STA. If any are found they are removed.
     98  */
     99 void hostapd_prune_associations(struct hostapd_data *hapd, const u8 *addr,
    100 				int mld_assoc_link_id)
    101 {
    102 	struct prune_data data;
    103 
    104 	data.hapd = hapd;
    105 	data.addr = addr;
    106 	data.mld_assoc_link_id = mld_assoc_link_id;
    107 
    108 	if (hapd->iface->interfaces &&
    109 	    hapd->iface->interfaces->for_each_interface)
    110 		hapd->iface->interfaces->for_each_interface(
    111 			hapd->iface->interfaces, prune_associations, &data);
    112 }
    113