int __uuid_generate_time(uuid_t out, int *num)
{
static unsigned char node_id[6];
static int has_init = 0;
struct uuid uu;
uint32_t clock_mid;
int ret;
if (!has_init) {
if (get_node_id(node_id) <= 0) {
random_get_bytes(node_id, 6);
/*
* Set multicast bit, to prevent conflicts
* with IEEE 802 addresses obtained from
* network cards
*/
node_id[0] |= 0x01;
}
has_init = 1;
}
ret = get_clock(&clock_mid, &uu.time_low, &uu.clock_seq, num);
uu.clock_seq |= 0x8000;
uu.time_mid = (uint16_t) clock_mid;
uu.time_hi_and_version = ((clock_mid >> 16) & 0x0FFF) | 0x1000;
memcpy(uu.node, node_id, 6);
uuid_pack(&uu, out);
return ret;
}
void uuid_generate_time(uuid_t out)
{
static unsigned char node_id[6];
static int has_init = 0;
struct uuid uu;
__u32 clock_mid;
if (!has_init) {
if (get_node_id(node_id) <= 0) {
get_random_bytes(node_id, 6);
/*
* Set multicast bit, to prevent conflicts
* with IEEE 802 addresses obtained from
* network cards
*/
node_id[0] |= 0x80;
}
has_init = 1;
}
get_clock(&clock_mid, &uu.time_low, &uu.clock_seq);
uu.clock_seq |= 0x8000;
uu.time_mid = (__u16) clock_mid;
uu.time_hi_and_version = (clock_mid >> 16) | 0x1000;
memcpy(uu.node, node_id, 6);
uuid_pack(&uu, out);
}
int uuid_parse(const char *in, uuid_t uu)
{
struct uuid uuid;
int i;
const char *cp;
char buf[3];
if (strlen(in) != 36)
return -1;
for (i=0, cp = in; i <= 36; i++,cp++) {
if ((i == 8) || (i == 13) || (i == 18) ||
(i == 23))
if (*cp == '-')
continue;
if (i== 36)
if (*cp == 0)
continue;
if (!isxdigit(*cp))
return -1;
}
uuid.time_low = strtoul(in, NULL, 16);
uuid.time_mid = strtoul(in+9, NULL, 16);
uuid.time_hi_and_version = strtoul(in+14, NULL, 16);
uuid.clock_seq = strtoul(in+19, NULL, 16);
cp = in+24;
buf[2] = 0;
for (i=0; i < 6; i++) {
buf[0] = *cp++;
buf[1] = *cp++;
uuid.node[i] = strtoul(buf, NULL, 16);
}
uuid_pack(&uuid, uu);
return 0;
}
void uuid_generate_random(uuid_t out)
{
uuid_t buf;
struct uuid uu;
get_random_bytes(buf, sizeof(buf));
uuid_unpack(buf, &uu);
uu.clock_seq = (uu.clock_seq & 0x3FFF) | 0x8000;
uu.time_hi_and_version = (uu.time_hi_and_version & 0x0FFF) | 0x4000;
uuid_pack(&uu, out);
}
void smb_uuid_generate_random(GUID *out)
{
GUID tmp;
struct uuid uu;
generate_random_buffer(tmp.info, sizeof(tmp.info), True);
uuid_unpack(tmp, &uu);
uu.clock_seq[0] = (uu.clock_seq[0] & 0x3F) | 0x80;
uu.time_hi_and_version = (uu.time_hi_and_version & 0x0FFF) | 0x4000;
uuid_pack(&uu, out);
}
void Misc::uuid_generate_random(uuid_t out)
{
uuid_t buf;
struct uuid uu;
int i, n;
n = 1;
for (i = 0; i < n; i++) {
get_system_random_bytes(buf, sizeof(buf));
uuid_unpack(buf, &uu);
uu.clock_seq = (uu.clock_seq & 0x3FFF) | 0x8000;
uu.time_hi_and_version = (uu.time_hi_and_version & 0x0FFF)
| 0x4000;
uuid_pack(&uu, out);
out += sizeof(uuid_t);
}
}
/*
* Generate time-based UUID and store it to @out
*
* Tries to guarantee uniqueness of the generated UUIDs by obtaining them from the uuidd daemon,
* or, if uuidd is not usable, by using the global clock state counter (see get_clock()).
* If neither of these is possible (e.g. because of insufficient permissions), it generates
* the UUID anyway, but returns -1. Otherwise, returns 0.
*/
static int uuid_generate_time_generic(uuid_t out) {
#ifdef HAVE_TLS
THREAD_LOCAL int num = 0;
THREAD_LOCAL struct uuid uu;
THREAD_LOCAL time_t last_time = 0;
time_t now;
if (num > 0) {
now = time(0);
if (now > last_time+1)
num = 0;
}
if (num <= 0) {
num = 1000;
if (get_uuid_via_daemon(UUIDD_OP_BULK_TIME_UUID,
out, &num) == 0) {
last_time = time(0);
uuid_unpack(out, &uu);
num--;
return 0;
}
num = 0;
}
if (num > 0) {
uu.time_low++;
if (uu.time_low == 0) {
uu.time_mid++;
if (uu.time_mid == 0)
uu.time_hi_and_version++;
}
num--;
uuid_pack(&uu, out);
return 0;
}
#else
if (get_uuid_via_daemon(UUIDD_OP_TIME_UUID, out, 0) == 0)
return 0;
#endif
return __uuid_generate_time(out, 0);
}
void __uuid_generate_random(uuid_t out, int *num)
{
uuid_t buf;
struct uuid uu;
int i, n;
if (!num || !*num)
n = 1;
else
n = *num;
for (i = 0; i < n; i++) {
random_get_bytes(buf, sizeof(buf));
uuid_unpack(buf, &uu);
uu.clock_seq = (uu.clock_seq & 0x3FFF) | 0x8000;
uu.time_hi_and_version = (uu.time_hi_and_version & 0x0FFF)
| 0x4000;
uuid_pack(&uu, out);
out += sizeof(uuid_t);
}
}
