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Interworking: Filter Probe Request frames based on HESSID and ANT

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Do not reply to Interworking-enabled Probe Request frames if they
request mismatching HESSID or ANT.
This commit is contained in:
Jouni Malinen 2011-10-21 12:43:53 +03:00 committed by Jouni Malinen
parent 538958ae9c
commit 122ba57936
1 changed files with 30 additions and 0 deletions
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30
src/ap/beacon.c
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@ -297,6 +297,36 @@ void handle_probe_req(struct hostapd_data *hapd,
return;
}
#ifdef CONFIG_INTERWORKING
if (elems.interworking && elems.interworking_len >= 1) {
u8 ant = elems.interworking[0] & 0x0f;
if (ant != INTERWORKING_ANT_WILDCARD &&
ant != hapd->conf->access_network_type) {
wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
" for mismatching ANT %u ignored",
MAC2STR(mgmt->sa), ant);
return;
}
}
if (elems.interworking &&
(elems.interworking_len == 7 || elems.interworking_len == 9)) {
const u8 *hessid;
if (elems.interworking_len == 7)
hessid = elems.interworking + 1;
else
hessid = elems.interworking + 1 + 2;
if (!is_broadcast_ether_addr(hessid) &&
os_memcmp(hessid, hapd->conf->hessid, ETH_ALEN) != 0) {
wpa_printf(MSG_MSGDUMP, "Probe Request from " MACSTR
" for mismatching HESSID " MACSTR
" ignored",
MAC2STR(mgmt->sa), MAC2STR(hessid));
return;
}
}
#endif /* CONFIG_INTERWORKING */
/* TODO: verify that supp_rates contains at least one matching rate
* with AP configuration */
#define MAX_PROBERESP_LEN 768