hostapd: Allow 'none' driver to be started without ifname

Commit 0dcc4dc4b31d48ed32940b9adb0b9fcdcab32dc3 made driver
initialization conditional on interface name being configured. This can
break hostapd-as-RADIUS-server use case where this parameter does not
really make any sense. Fix this with a special case for the none driver.

Signed-hostap: Jouni Malinen <j@w1.fi>

hostapd/main.c

@@ -21,6 +21,7 @@
 #include "eap_server/tncs.h"
 #include "ap/hostapd.h"
 #include "ap/ap_config.h"
+#include "ap/ap_drv_ops.h"
 #include "config_file.h"
 #include "eap_register.h"
 #include "dump_state.h"
@@ -316,7 +317,8 @@ hostapd_interface_init(struct hapd_interfaces *interfaces,
 			iface->bss[0]->conf->logger_stdout_level--;
 	}
 
-	if (iface->conf->bss[0].iface[0] != 0) {
+	if (iface->conf->bss[0].iface[0] != 0 ||
+	    hostapd_drv_none(iface->bss[0])) {
 		if (hostapd_driver_init(iface) ||
 			hostapd_setup_interface(iface)) {
 			hostapd_interface_deinit_free(iface);