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MBO: Prevent association to APs that explicitly disallow this

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Prevent association to MBO APs that have association disallowed
attribute in MBO IE in Beacon or Probe Response frames.

Signed-off-by: David Spinadel <david.spinadel@intel.com>
This commit is contained in:
David Spinadel 2016-02-15 16:53:29 +02:00 committed by Jouni Malinen
parent c5d193d7b3
commit cb06cf3456
3 changed files with 32 additions and 0 deletions
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13
wpa_supplicant/events.c
View file

@ -827,6 +827,9 @@ static struct wpa_ssid * wpa_scan_res_match(struct wpa_supplicant *wpa_s,
const u8 *ie;
struct wpa_ssid *ssid;
int osen;
#ifdef CONFIG_MBO
const u8 *assoc_disallow;
#endif /* CONFIG_MBO */
ie = wpa_bss_get_vendor_ie(bss, WPA_IE_VENDOR_TYPE);
wpa_ie_len = ie ? ie[1] : 0;
@ -1064,6 +1067,16 @@ static struct wpa_ssid * wpa_scan_res_match(struct wpa_supplicant *wpa_s,
(unsigned int) diff.usec);
continue;
}
#ifdef CONFIG_MBO
assoc_disallow = wpas_mbo_get_bss_attr(
bss, MBO_ATTR_ID_ASSOC_DISALLOW);
if (assoc_disallow && assoc_disallow[1] >= 1) {
wpa_dbg(wpa_s, MSG_DEBUG,
" skip - MBO association disallowed (reason %u)",
assoc_disallow[2]);
continue;
}
#endif /* CONFIG_MBO */
/* Matching configuration found */
return ssid;

18
wpa_supplicant/mbo.c
View file

@ -36,6 +36,24 @@ static int wpas_mbo_validate_non_pref_chan(u8 oper_class, u8 chan, u8 reason)
}
const u8 * wpas_mbo_get_bss_attr(struct wpa_bss *bss, enum mbo_attr_id attr)
{
const u8 *mbo, *end;
if (!bss)
return NULL;
mbo = wpa_bss_get_vendor_ie(bss, MBO_IE_VENDOR_TYPE);
if (!mbo)
return NULL;
end = mbo + 2 + mbo[1];
mbo += MBO_IE_HEADER;
return get_ie(mbo, end - mbo, attr);
}
static void wpas_mbo_non_pref_chan_attr_body(struct wpa_supplicant *wpa_s,
struct wpabuf *mbo,
u8 start, u8 end)

1
wpa_supplicant/wpa_supplicant_i.h
View file

@ -1144,6 +1144,7 @@ void wpas_rrm_handle_link_measurement_request(struct wpa_supplicant *wpa_s,
/* MBO functions */
int wpas_mbo_ie(struct wpa_supplicant *wpa_s, u8 *buf, size_t len);
const u8 * wpas_mbo_get_bss_attr(struct wpa_bss *bss, enum mbo_attr_id attr);
int wpas_mbo_update_non_pref_chan(struct wpa_supplicant *wpa_s,
const char *non_pref_chan);
void wpas_mbo_scan_ie(struct wpa_supplicant *wpa_s, struct wpabuf *ie);