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MLD: Add support for disabled APs

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An affiliated AP of an AP MLD can temporarily be disabled. Other
affiliated APs of the AP MLD indicate this in the Reduced Neighbor
Report (RNR) elements added to their Beacon and Probe Response frames.

When an affiliated AP is disabled, it should be included in the
association exchange, but can be activated only after it is enabled.

Add support identifying disabled APs and propagate the information
to the driver within the associate() callback.

Signed-off-by: Ilan Peer <ilan.peer@intel.com>
Signed-off-by: Andrei Otcheretianski <andrei.otcheretianski@intel.com>
This commit is contained in:
Ilan Peer 2023-12-21 13:08:20 +02:00 committed by Jouni Malinen
parent 981e8c1e49
commit 5927455b8b
6 changed files with 22 additions and 1 deletions
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9
src/common/ieee802_11_defs.h
View file

@ -2522,6 +2522,15 @@ struct ieee80211_he_mu_edca_parameter_set {
#define RNR_BSS_PARAM_CO_LOCATED BIT(6)
#define RNR_20_MHZ_PSD_MAX_TXPOWER 255 /* dBm */
/* IEEE P802.11be/D5.0, Figure 9-704c - MLD Parameters subfield format */
/* B0..B7: AP MLD ID */
/* B8..B11: Link ID */
/* B12..B19: BSS Parameters Change Count */
/* B20: All Updates Included */
#define RNR_TBTT_INFO_MLD_PARAM2_ALL_UPDATE_INC 0x10
/* B21: Disabled Link Indication */
#define RNR_TBTT_INFO_MLD_PARAM2_LINK_DISABLED 0x20
/* IEEE P802.11be/D2.3, 9.4.2.311 - EHT Operation element */
/* Figure 9-1002b: EHT Operation Parameters field subfields */

1
src/drivers/driver.h
View file

@ -950,6 +950,7 @@ struct wpa_driver_mld_params {
const u8 *ies;
size_t ies_len;
int error;
bool disabled;
} mld_links[MAX_NUM_MLD_LINKS];
};

2
wpa_supplicant/bss.c
View file

@ -1553,6 +1553,8 @@ wpa_bss_parse_ml_rnr_ap_info(struct wpa_supplicant *wpa_s,
os_memcpy(l->bssid, ap_info->data + 1,
ETH_ALEN);
l->freq = neigh_bss->freq;
l->disabled = mld_params[2] &
RNR_TBTT_INFO_MLD_PARAM2_LINK_DISABLED;
bss->n_mld_links++;
}
}

3
wpa_supplicant/bss.h
View file

@ -133,6 +133,9 @@ struct wpa_bss {
u8 link_id;
u8 bssid[ETH_ALEN];
int freq;
/* Whether the link is valid but currently disabled */
bool disabled;
} mld_links[MAX_NUM_MLD_LINKS];
/* followed by ie_len octets of IEs */

7
wpa_supplicant/sme.c
View file

@ -536,6 +536,7 @@ static void wpas_sme_set_mlo_links(struct wpa_supplicant *wpa_s,
os_memcpy(wpa_s->links[link_id].bssid, bssid, ETH_ALEN);
wpa_s->links[link_id].freq = bss->mld_links[i].freq;
wpa_s->links[link_id].bss = wpa_bss_get_bssid(wpa_s, bssid);
wpa_s->links[link_id].disabled = bss->mld_links[i].disabled;
}
}
@ -2591,9 +2592,13 @@ mscs_fail:
wpa_s->links[i].bssid;
params.mld_params.mld_links[i].freq =
wpa_s->links[i].freq;
params.mld_params.mld_links[i].disabled =
wpa_s->links[i].disabled;
wpa_printf(MSG_DEBUG, "MLD: id=%u, freq=%d, " MACSTR,
wpa_printf(MSG_DEBUG,
"MLD: id=%u, freq=%d, disabled=%u, " MACSTR,
i, wpa_s->links[i].freq,
wpa_s->links[i].disabled,
MAC2STR(wpa_s->links[i].bssid));
}
}

1
wpa_supplicant/wpa_supplicant_i.h
View file

@ -735,6 +735,7 @@ struct wpa_supplicant {
u8 bssid[ETH_ALEN];
unsigned int freq;
struct wpa_bss *bss;
bool disabled;
} links[MAX_NUM_MLD_LINKS];
u8 *last_con_fail_realm;
size_t last_con_fail_realm_len;