P2P: Allow separate P2P group interface use to be disabled

The new p2p_no_group_iface=1 configuration parameter can now be used to
disable the default behavior of adding a separate interface for the P2P
group when driver support for concurrent interfaces is available.

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

wpa_supplicant/config.c

@@ -3008,6 +3008,7 @@ static const struct global_parse_data global_fields[] = {
 	{ FUNC(p2p_pref_chan), CFG_CHANGED_P2P_PREF_CHAN },
 	{ INT(p2p_go_ht40), 0 },
 	{ INT(p2p_disabled), 0 },
+	{ INT(p2p_no_group_iface), 0 },
 #endif /* CONFIG_P2P */
 	{ FUNC(country), CFG_CHANGED_COUNTRY },
 	{ INT(bss_max_count), 0 },

wpa_supplicant/config.h

@@ -762,6 +762,17 @@ struct wpa_config {
 	 * p2p_disabled - Whether P2P operations are disabled for this interface
 	 */
 	int p2p_disabled;
+
+	/**
+	 * p2p_no_group_iface - Whether group interfaces can be used
+	 *
+	 * By default, wpa_supplicant will create a separate interface for P2P
+	 * group operations if the driver supports this. This functionality can
+	 * be disabled by setting this parameter to 1. In that case, the same
+	 * interface that was used for the P2P management operations is used
+	 * also for the group operation.
+	 */
+	int p2p_no_group_iface;
 };
 
 

wpa_supplicant/config_file.c

@@ -872,6 +872,9 @@ static void wpa_config_write_global(FILE *f, struct wpa_config *config)
 		fprintf(f, "p2p_go_ht40=%u\n", config->p2p_go_ht40);
 	if (config->p2p_disabled)
 		fprintf(f, "p2p_disabled=%u\n", config->p2p_disabled);
+	if (config->p2p_no_group_iface)
+		fprintf(f, "p2p_no_group_iface=%u\n",
+			config->p2p_no_group_iface);
 #endif /* CONFIG_P2P */
 	if (config->country[0] && config->country[1]) {
 		fprintf(f, "country=%c%c\n",

wpa_supplicant/p2p_supplicant.c

@@ -2859,6 +2859,8 @@ void wpas_p2p_deinit_global(struct wpa_global *global)
 
 static int wpas_p2p_create_iface(struct wpa_supplicant *wpa_s)
 {
+	if (wpa_s->conf->p2p_no_group_iface)
+		return 0; /* separate interface disabled per configuration */
 	if (wpa_s->drv_flags &
 	    (WPA_DRIVER_FLAGS_P2P_DEDICATED_INTERFACE |
 	     WPA_DRIVER_FLAGS_P2P_MGMT_AND_NON_P2P))