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https://github.com/vanhoefm/fragattacks.git
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baf513d695
The signal strength is currently never used as the only driver reporting it is nl80211 which uses IEEE80211_RADIOTAP_DB_ANTSIGNAL which is never populated by the kernel. The kernel will (soon) populate IEEE80211_RADIOTAP_DBM_ANTSIGNAL instead though, so use that. Also, since it was never really populated, we can redefine the signal field to be in dBm units only. My next patch will also require knowing the signal strength of probe requests throughout the code (where available), so add it to the necessary APIs. Signed-hostap: Johannes Berg <johannes.berg@intel.com>
85 lines
1.9 KiB
C
85 lines
1.9 KiB
C
/*
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* AP mode helper functions
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* Copyright (c) 2009, Jouni Malinen <j@w1.fi>
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*
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* This software may be distributed under the terms of the BSD license.
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* See README for more details.
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*/
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#include "includes.h"
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#include "common.h"
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#include "common/ieee802_11_defs.h"
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#include "sta_info.h"
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#include "hostapd.h"
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int hostapd_register_probereq_cb(struct hostapd_data *hapd,
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int (*cb)(void *ctx, const u8 *sa,
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const u8 *da, const u8 *bssid,
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const u8 *ie, size_t ie_len,
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int ssi_signal),
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void *ctx)
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{
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struct hostapd_probereq_cb *n;
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n = os_realloc(hapd->probereq_cb, (hapd->num_probereq_cb + 1) *
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sizeof(struct hostapd_probereq_cb));
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if (n == NULL)
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return -1;
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hapd->probereq_cb = n;
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n = &hapd->probereq_cb[hapd->num_probereq_cb];
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hapd->num_probereq_cb++;
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n->cb = cb;
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n->ctx = ctx;
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return 0;
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}
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struct prune_data {
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struct hostapd_data *hapd;
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const u8 *addr;
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};
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static int prune_associations(struct hostapd_iface *iface, void *ctx)
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{
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struct prune_data *data = ctx;
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struct sta_info *osta;
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struct hostapd_data *ohapd;
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size_t j;
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for (j = 0; j < iface->num_bss; j++) {
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ohapd = iface->bss[j];
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if (ohapd == data->hapd)
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continue;
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osta = ap_get_sta(ohapd, data->addr);
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if (!osta)
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continue;
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ap_sta_disassociate(ohapd, osta, WLAN_REASON_UNSPECIFIED);
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}
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return 0;
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}
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/**
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* hostapd_prune_associations - Remove extraneous associations
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* @hapd: Pointer to BSS data for the most recent association
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* @addr: Associated STA address
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*
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* This function looks through all radios and BSS's for previous
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* (stale) associations of STA. If any are found they are removed.
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*/
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void hostapd_prune_associations(struct hostapd_data *hapd, const u8 *addr)
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{
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struct prune_data data;
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data.hapd = hapd;
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data.addr = addr;
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if (hapd->iface->for_each_interface)
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hapd->iface->for_each_interface(hapd->iface->interfaces,
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prune_associations, &data);
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}
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