P2P: Allow P2P functionality to be disabled per interface

By default, P2P is enabled globally for all virtual interfaces and this
makes wpa_supplicant include WSC and P2P IEs in Probe Request frames for
all scans even if this is for a non-P2P station connection to speed up
device discovery. If an interface is dedicated for non-P2P station mode
operations, it is now possible to disable addition of WSC and P2P IEs
into Probe Request frames with a per-interface p2p_disabled parameter.
This can be set either in the configuration file (p2p_disabled=1) or at
run time ("wpa_cli -i wlan0 set p2p_disabled 1"). Unlike the previous
mechanism ("wpa_cli p2p_set disabled 1"), the new parameter changes the
behavior only for the specified interface while other interfaces
continue to follow the global P2P enabled/disabled state.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>

wpa_supplicant/config.c

@@ -3007,6 +3007,7 @@ static const struct global_parse_data global_fields[] = {
 	{ INT(p2p_group_idle), 0 },
 	{ FUNC(p2p_pref_chan), CFG_CHANGED_P2P_PREF_CHAN },
 	{ INT(p2p_go_ht40), 0 },
+	{ INT(p2p_disabled), 0 },
 #endif /* CONFIG_P2P */
 	{ FUNC(country), CFG_CHANGED_COUNTRY },
 	{ INT(bss_max_count), 0 },

wpa_supplicant/config.h

@@ -757,6 +757,11 @@ struct wpa_config {
 	 * By default: 0 (disabled)
 	 */
 	int p2p_go_ht40;
+
+	/**
+	 * p2p_disabled - Whether P2P operations are disabled for this interface
+	 */
+	int p2p_disabled;
 };
 
 

wpa_supplicant/config_file.c

@@ -870,6 +870,8 @@ static void wpa_config_write_global(FILE *f, struct wpa_config *config)
 	}
 	if (config->p2p_go_ht40)
 		fprintf(f, "p2p_go_ht40=%u\n", config->p2p_go_ht40);
+	if (config->p2p_disabled)
+		fprintf(f, "p2p_disabled=%u\n", config->p2p_disabled);
 #endif /* CONFIG_P2P */
 	if (config->country[0] && config->country[1]) {
 		fprintf(f, "country=%c%c\n",

wpa_supplicant/scan.c

@@ -66,7 +66,8 @@ static int wpas_wps_in_use(struct wpa_supplicant *wpa_s,
 	}
 
 #ifdef CONFIG_P2P
-	if (!wpa_s->global->p2p_disabled && wpa_s->global->p2p) {
+	if (!wpa_s->global->p2p_disabled && wpa_s->global->p2p &&
+	    !wpa_s->conf->p2p_disabled) {
 		wpa_s->wps->dev.p2p = 1;
 		if (!wps) {
 			wps = 1;