wpa_supplicant: Basic support for PBSS/PCP

PBSS (Personal Basic Service Set) is a new BSS type for DMG
networks. It is similar to infrastructure BSS, having an AP-like
entity called PCP (PBSS Control Point), but it has few differences.
PBSS support is mandatory for IEEE 802.11ad devices.

Add a new "pbss" argument to network block. The argument is used
in the following scenarios:
1. When network has mode=2 (AP), when pbss flag is set will start
as a PCP instead of an AP.
2. When network has mode=0 (station), when pbss flag is set will
connect to PCP instead of AP.

The function wpa_scan_res_match() was modified to match BSS according to
the pbss flag in the network block (wpa_ssid structure). When pbss flag
is set it will match only PCPs, and when it is clear it will match only
APs.

Signed-off-by: Lior David <qca_liord@qca.qualcomm.com>

src/ap/ap_config.h

@@ -570,6 +570,8 @@ struct hostapd_bss_config {
 
 	char *no_probe_resp_if_seen_on;
 	char *no_auth_if_seen_on;
+
+	int pbss;
 };
 
 

src/ap/beacon.c

@@ -1217,6 +1217,7 @@ int ieee802_11_build_ap_params(struct hostapd_data *hapd,
 		params->osen = 1;
 	}
 #endif /* CONFIG_HS20 */
+	params->pbss = hapd->conf->pbss;
 	return 0;
 }
 

wpa_supplicant/ap.c

@@ -453,6 +453,8 @@ no_wps:
 			wpabuf_dup(wpa_s->conf->ap_vendor_elements);
 	}
 
+	bss->pbss = ssid->pbss;
+
 	return 0;
 }
 

wpa_supplicant/bss.h

@@ -148,6 +148,17 @@ static inline int bss_is_dmg(const struct wpa_bss *bss)
 	return bss->freq > 45000;
 }
 
+/**
+ * Test whether a BSS is a PBSS.
+ * This checks whether a BSS is a DMG-band PBSS. PBSS is used for P2P DMG
+ * network.
+ */
+static inline int bss_is_pbss(struct wpa_bss *bss)
+{
+	return bss_is_dmg(bss) &&
+		(bss->caps & IEEE80211_CAP_DMG_MASK) == IEEE80211_CAP_DMG_PBSS;
+}
+
 static inline void wpa_bss_update_level(struct wpa_bss *bss, int new_level)
 {
 	if (bss != NULL && new_level < 0)

wpa_supplicant/config.c

@@ -1980,6 +1980,7 @@ static const struct parse_data ssid_fields[] = {
 	{ INT(update_identifier) },
 #endif /* CONFIG_HS20 */
 	{ INT_RANGE(mac_addr, 0, 2) },
+	{ INT_RANGE(pbss, 0, 1) },
 };
 
 #undef OFFSET

wpa_supplicant/config_file.c

@@ -755,6 +755,7 @@ static void wpa_config_write_network(FILE *f, struct wpa_ssid *ssid)
 	INT(peerkey);
 	INT(mixed_cell);
 	INT(max_oper_chwidth);
+	INT(pbss);
 #ifdef CONFIG_IEEE80211W
 	write_int(f, "ieee80211w", ssid->ieee80211w,
 		  MGMT_FRAME_PROTECTION_DEFAULT);

wpa_supplicant/config_ssid.h

@@ -359,6 +359,15 @@ struct wpa_ssid {
 		WPAS_MODE_MESH = 5,
 	} mode;
 
+	/**
+	 * pbss - Whether to use PBSS. Relevant to DMG networks only.
+	 * Used together with mode configuration. When mode is AP, it
+	 * means to start a PCP instead of a regular AP. When mode is INFRA it
+	 * means connect to a PCP instead of AP. P2P_GO and P2P_GROUP_FORMATION
+	 * modes must use PBSS in DMG network.
+	 */
+	int pbss;
+
 	/**
 	 * disabled - Whether this network is currently disabled
 	 *

wpa_supplicant/events.c

@@ -988,8 +988,14 @@ static struct wpa_ssid * wpa_scan_res_match(struct wpa_supplicant *wpa_s,
 			continue;
 		}
 
-		if (!bss_is_ess(bss)) {
+		if (!bss_is_ess(bss) && !bss_is_pbss(bss)) {
-			wpa_dbg(wpa_s, MSG_DEBUG, "   skip - not ESS network");
+			wpa_dbg(wpa_s, MSG_DEBUG, "   skip - neither ESS nor PBSS network");
+			continue;
+		}
+
+		if (ssid->pbss != bss_is_pbss(bss)) {
+			wpa_dbg(wpa_s, MSG_DEBUG, "   skip - PBSS mismatch (ssid %d bss %d)",
+				ssid->pbss, bss_is_pbss(bss));
 			continue;
 		}
 

wpa_supplicant/p2p_supplicant.c

@@ -1898,6 +1898,8 @@ static void wpas_start_wps_go(struct wpa_supplicant *wpa_s,
 		 */
 		ssid->pairwise_cipher = WPA_CIPHER_GCMP;
 		ssid->group_cipher = WPA_CIPHER_GCMP;
+		/* P2P GO in 60 GHz is always a PCP (PBSS) */
+		ssid->pbss = 1;
 	}
 	if (os_strlen(params->passphrase) > 0) {
 		ssid->passphrase = os_strdup(params->passphrase);

wpa_supplicant/wpa_cli.c

@@ -1612,7 +1612,7 @@ static const char *network_fields[] = {
 #ifdef CONFIG_HS20
 	"update_identifier",
 #endif /* CONFIG_HS20 */
-	"mac_addr"
+	"mac_addr", "pbss"
 };
 
 

wpa_supplicant/wpa_supplicant.c

@@ -2345,9 +2345,11 @@ static void wpas_start_assoc_cb(struct wpa_radio_work *work, int deinit)
 		}
 		params.bssid_hint = bss->bssid;
 		params.freq_hint = bss->freq;
+		params.pbss = bss_is_pbss(bss);
 	} else {
 		params.ssid = ssid->ssid;
 		params.ssid_len = ssid->ssid_len;
+		params.pbss = ssid->pbss;
 	}
 
 	if (ssid->mode == WPAS_MODE_IBSS && ssid->bssid_set &&

wpa_supplicant/wpa_supplicant.conf

@@ -702,6 +702,13 @@ fast_reauth=1
 # an IBSS network with the configured SSID is already present, the frequency of
 # the network will be used instead of this configured value.
 #
+# pbss: Whether to use PBSS. Relevant to IEEE 802.11ad networks only.
+# Used together with mode configuration. When mode is AP, it means to start a
+# PCP instead of a regular AP. When mode is infrastructure it means connect
+# to a PCP instead of AP. P2P_GO and P2P_GROUP_FORMATION modes must use PBSS
+# in IEEE 802.11ad network.
+# For more details, see IEEE Std 802.11ad-2012.
+#
 # scan_freq: List of frequencies to scan
 # Space-separated list of frequencies in MHz to scan when searching for this
 # BSS. If the subset of channels used by the network is known, this option can

wpa_supplicant/wps_supplicant.c

@@ -1149,6 +1149,10 @@ int wpas_wps_start_pbc(struct wpa_supplicant *wpa_s, const u8 *bssid,
 			ssid->ssid_len = wpa_s->go_params->ssid_len;
 			os_memcpy(ssid->ssid, wpa_s->go_params->ssid,
 				  ssid->ssid_len);
+			if (wpa_s->go_params->freq > 56160) {
+				/* P2P in 60 GHz uses PBSS */
+				ssid->pbss = 1;
+			}
 			wpa_hexdump_ascii(MSG_DEBUG, "WPS: Use specific AP "
 					  "SSID", ssid->ssid, ssid->ssid_len);
 		}
@@ -1216,6 +1220,10 @@ static int wpas_wps_start_dev_pw(struct wpa_supplicant *wpa_s,
 			ssid->ssid_len = wpa_s->go_params->ssid_len;
 			os_memcpy(ssid->ssid, wpa_s->go_params->ssid,
 				  ssid->ssid_len);
+			if (wpa_s->go_params->freq > 56160) {
+				/* P2P in 60 GHz uses PBSS */
+				ssid->pbss = 1;
+			}
 			wpa_hexdump_ascii(MSG_DEBUG, "WPS: Use specific AP "
 					  "SSID", ssid->ssid, ssid->ssid_len);
 		}