P2PS: Enable Probe Request frame processing by P2P Client

1. Add global p2p_cli_probe property to enable/disable Probe Request
frame RX reporting for connected P2P Clients. The property can be set to
0 - disable or 1 - enable. The default value is 0.

2. Enable Probe Request frame RX reporting for P2P Client on
WPA_COMPLETED state if p2p_cli_probe property is set to 1. Disable it
when an interface state is changing to any other state.

3. Don't cancel Probe Request frame RX reporting on wpa_stop_listen for
a connected P2P Client handling Probe Request frames.

Signed-off-by: Max Stepanov <Max.Stepanov@intel.com>
Reviewed-by: Ilan Peer <ilan.peer@intel.com>

wpa_supplicant/config.c

@@ -4180,6 +4180,7 @@ static const struct global_parse_data global_fields[] = {
 	{ IPV4(ip_addr_mask), 0 },
 	{ IPV4(ip_addr_start), 0 },
 	{ IPV4(ip_addr_end), 0 },
+	{ INT_RANGE(p2p_cli_probe, 0, 1), 0 },
 #endif /* CONFIG_P2P */
 	{ FUNC(country), CFG_CHANGED_COUNTRY },
 	{ INT(bss_max_count), 0 },

wpa_supplicant/config.h

@@ -967,6 +967,18 @@ struct wpa_config {
 	 */
 	int p2p_no_group_iface;
 
+	/**
+	 * p2p_cli_probe - Enable/disable P2P CLI probe request handling
+	 *
+	 * If this parameter is set to 1, a connected P2P Client will receive
+	 * and handle Probe Request frames. Setting this parameter to 0
+	 * disables this option. Default value: 0.
+	 *
+	 * Note: Setting this property at run time takes effect on the following
+	 * interface state transition to/from the WPA_COMPLETED state.
+	 */
+	int p2p_cli_probe;
+
 	/**
 	 * okc - Whether to enable opportunistic key caching by default
 	 *

wpa_supplicant/config_file.c

@@ -1131,6 +1131,9 @@ static void wpa_config_write_global(FILE *f, struct wpa_config *config)
 	if (config->p2p_ignore_shared_freq)
 		fprintf(f, "p2p_ignore_shared_freq=%u\n",
 			config->p2p_ignore_shared_freq);
+	if (config->p2p_cli_probe)
+		fprintf(f, "p2p_cli_probe=%u\n",
+			config->p2p_cli_probe);
 #endif /* CONFIG_P2P */
 	if (config->country[0] && config->country[1]) {
 		fprintf(f, "country=%c%c\n",

wpa_supplicant/p2p_supplicant.c

@@ -1874,6 +1874,7 @@ static void wpas_p2p_clone_config(struct wpa_supplicant *dst,
 		d->wps_nfc_dh_privkey = wpabuf_dup(s->wps_nfc_dh_privkey);
 		d->wps_nfc_dh_pubkey = wpabuf_dup(s->wps_nfc_dh_pubkey);
 	}
+	d->p2p_cli_probe = s->p2p_cli_probe;
 }
 
 
@@ -2384,7 +2385,14 @@ static void wpas_stop_listen(void *ctx)
 		wpa_s->roc_waiting_drv_freq = 0;
 	}
 	wpa_drv_set_ap_wps_ie(wpa_s, NULL, NULL, NULL);
-	wpa_drv_probe_req_report(wpa_s, 0);
+
+	/*
+	 * Don't cancel Probe Request RX reporting for a connected P2P Client
+	 * handling Probe Request frames.
+	 */
+	if (!wpa_s->p2p_cli_probe)
+		wpa_drv_probe_req_report(wpa_s, 0);
+
 	wpas_p2p_listen_work_done(wpa_s);
 }
 

wpa_supplicant/wpa_supplicant.c

@@ -728,6 +728,30 @@ void wpa_supplicant_set_state(struct wpa_supplicant *wpa_s,
 		wpa_s->normal_scans = 0;
 	}
 
+#ifdef CONFIG_P2P
+	/*
+	 * P2PS client has to reply to Probe Request frames received on the
+	 * group operating channel. Enable Probe Request frame reporting for
+	 * P2P connected client in case p2p_cli_probe configuration property is
+	 * set to 1.
+	 */
+	if (wpa_s->conf->p2p_cli_probe && wpa_s->current_ssid &&
+	    wpa_s->current_ssid->mode == WPAS_MODE_INFRA &&
+	    wpa_s->current_ssid->p2p_group) {
+		if (state == WPA_COMPLETED && !wpa_s->p2p_cli_probe) {
+			wpa_dbg(wpa_s, MSG_DEBUG,
+				"P2P: Enable CLI Probe Request RX reporting");
+			wpa_s->p2p_cli_probe =
+				wpa_drv_probe_req_report(wpa_s, 1) >= 0;
+		} else if (state != WPA_COMPLETED && wpa_s->p2p_cli_probe) {
+			wpa_dbg(wpa_s, MSG_DEBUG,
+				"P2P: Disable CLI Probe Request RX reporting");
+			wpa_s->p2p_cli_probe = 0;
+			wpa_drv_probe_req_report(wpa_s, 0);
+		}
+	}
+#endif /* CONFIG_P2P */
+
 	if (state != WPA_SCANNING)
 		wpa_supplicant_notify_scanning(wpa_s, 0);
 

wpa_supplicant/wpa_supplicant_i.h

@@ -818,6 +818,7 @@ struct wpa_supplicant {
 	unsigned int p2p_peer_oob_pk_hash_known:1;
 	unsigned int p2p_disable_ip_addr_req:1;
 	unsigned int p2ps_join_addr_valid:1;
+	unsigned int p2p_cli_probe:1;
 	int p2p_persistent_go_freq;
 	int p2p_persistent_id;
 	int p2p_go_intent;