WPS: Make UUID-from-MAC Address easily available

"hostapd -u<MAC Address>" can now be used to display the UUID that will
be generated based on a MAC Address (i.e., when hostapd configuration
does not set a specific UUID).

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

hostapd/main.c

@@ -14,6 +14,7 @@
 
 #include "utils/common.h"
 #include "utils/eloop.h"
+#include "utils/uuid.h"
 #include "crypto/random.h"
 #include "crypto/tls.h"
 #include "common/version.h"
@@ -501,6 +502,27 @@ static int hostapd_get_ctrl_iface_group(struct hapd_interfaces *interfaces,
 }
 
 
+#ifdef CONFIG_WPS
+static int gen_uuid(const char *txt_addr)
+{
+	u8 addr[ETH_ALEN];
+	u8 uuid[UUID_LEN];
+	char buf[100];
+
+	if (hwaddr_aton(txt_addr, addr) < 0)
+		return -1;
+
+	uuid_gen_mac_addr(addr, uuid);
+	if (uuid_bin2str(uuid, buf, sizeof(buf)) < 0)
+		return -1;
+
+	printf("%s\n", buf);
+
+	return 0;
+}
+#endif /* CONFIG_WPS */
+
+
 int main(int argc, char *argv[])
 {
 	struct hapd_interfaces interfaces;
@@ -531,7 +553,7 @@ int main(int argc, char *argv[])
 	interfaces.global_ctrl_sock = -1;
 
 	for (;;) {
-		c = getopt(argc, argv, "b:Bde:f:hKP:Ttvg:G:");
+		c = getopt(argc, argv, "b:Bde:f:hKP:Ttu:vg:G:");
 		if (c < 0)
 			break;
 		switch (c) {
@@ -588,6 +610,10 @@ int main(int argc, char *argv[])
 			bss_config = tmp_bss;
 			bss_config[num_bss_configs++] = optarg;
 			break;
+#ifdef CONFIG_WPS
+		case 'u':
+			return gen_uuid(optarg);
+#endif /* CONFIG_WPS */
 		default:
 			usage();
 			break;