2  * Universally Unique IDentifier (UUID)
13 #include "uuid.h"
65 int is_nil_uuid(const u8 *uuid)  in is_nil_uuid()  argument
69 		if (uuid[i])  in is_nil_uuid()
75 int uuid_random(u8 *uuid)  in uuid_random()  argument
81 	 * os_get_random() output in the UUID field. */  in uuid_random()
83 	if (os_get_random(uuid, UUID_LEN) < 0 ||  in uuid_random()
84 	    hmac_sha256(uuid, UUID_LEN, (const u8 *) &t, sizeof(t), hash) < 0)  in uuid_random()
87 	os_memcpy(uuid, hash, UUID_LEN);  in uuid_random()
90 	uuid[6] = (4 << 4) | (uuid[6] & 0x0f);  in uuid_random()
93 	uuid[8] = 0x80 | (uuid[8] & 0x3f);  in uuid_random()