#include <stdint.h>
#include <sys/time.h>
#include <stdio.h>
+#include <errno.h>
+
+#include <inttypes.h>
#include "hash.h"
#include <iphlpapi.h>
#endif
+#if 0
+static void pnode(uint64_t node) {
+ unsigned int bytes[6];
+ int i;
+ for (i=0;i<6;i++) {
+ bytes[5-i] = node & 0xff;
+ node >>= 8;
+ }
+
+ fprintf(stderr, "%02x", bytes[0]);
+
+ for (i=1;i<6;i++) {
+ fprintf(stderr, ":%02x", bytes[i]);
+ }
+ fprintf(stderr, "\n");
+}
+#endif
+
static void set_time_low(pd_uuid_t *u, uint32_t low) {
u->data[0] = (low >> 24) & 0xff;
u->data[1] = (low >> 16) & 0xff;
return node;
}
+
/*
* TODO would probably make more sense to use a destination array
* rather than returning an integer
if (req->ifr_flags & IFF_NOARP) {
continue;
}
+
+
if (ioctl(s, SIOCGIFHWADDR, req) == 0) {
data = (unsigned char *)req->ifr_hwaddr.sa_data;
node = data[0];
node = node << 8; node += data[4];
node = node << 8; node += data[5];
close(s);
+
return node;
+ } else {
+ fprintf(stderr, "ioctl to read address failed: %d\n", errno);
}
}
}
uint64_t node;
s->available = 0;
- s->node = 0LL;
- s->clock_sequence = 0;
- s->timestamp = 0LL;
node = current_node(s);
if (!s->available || s->node != node) {
s->clock_sequence = random_clock_sequence(s);
}
+ s->node = node;
return 0;
}
s->random_bytes = get_bytes;
s->rng_state = 0;
+ s->node = 0;
s->available = 0;
return 1;
}
+static int pd_uuid_make_v1_any(struct pd_uuid_state *s, pd_uuid_t *uuid, int rmac);
int pd_uuid_make_v1(struct pd_uuid_state *s, pd_uuid_t *uuid) {
- struct pd_uuid_state ls;
- uint64_t now;
- int err;
-
- if (!s) {
- s = &ls;
- pd_uuid_init_state(s);
- }
-
- if (s->get_lock) {
- if ((err = s->get_lock(s->lock_data)) != 0) {
- /* TODO set uuid to nil ? */
- /* be cute and have an "error" uuid? */
- return 0;
- }
- }
-
- if (s->read_state) {
- if ((err = s->read_state(s)) != 0) {
- return 0;
- }
- }
-
- now = current_time();
-
- if (s->available && s->timestamp > now) {
- s->clock_sequence++;
- } else {
- s->timestamp = now;
- }
-
- if (s->save_state) {
- if ((err = s->save_state(s)) != 0) {
- return 0;
- }
- }
-
- if (s->release_lock) {
- if ((err = s->release_lock(s->lock_data)) != 0) {
- /* TODO set uuid to nil ? */
- /* be cute and have an "error" uuid? */
- return 0;
- }
- }
-
- format_uuid(uuid, s, 1);
-
- return 1;
+ return pd_uuid_make_v1_any(s, uuid, 0);
}
int pd_uuid_make_v1mc(struct pd_uuid_state *s, pd_uuid_t *uuid) {
+ return pd_uuid_make_v1_any(s, uuid, 1);
+}
+
+static int pd_uuid_make_v1_any(struct pd_uuid_state *s, pd_uuid_t *uuid, int rmac) {
struct pd_uuid_state ls;
uint64_t now;
uint64_t node;
}
now = current_time();
- node = random_mc_mac(s);
+ if (rmac) {
+ node = random_mc_mac(s);
+ } else {
+ node = current_node(s);
+ }
if (!s->available || s->node != node) {
s->clock_sequence = random_clock_sequence(s);
return 1;
}
+/*
+ * s must point to enough space
+ */
+char *pd_uuid_get_string(pd_uuid_t *uuid, char *s) {
+ char *r;
+ int i;
+
+ r = s;
+
+ for (i=0;i<16;i++) {
+ r += sprintf(r, "%.2x", (int)uuid->data[i]);
+ if (i == 3 || i == 5 || i == 7 || i == 9) {
+ *r++ = '-';
+ *r = 0;
+ }
+ }
+
+ return s;
+}
+
int pd_uuid_set_string(pd_uuid_t *uuid, char *s) {
unsigned int byte;
int i;
#include <stdint.h>
+#define PD_UUID_BINLEN 16
+#define PD_UUID_STRLEN 36
+
struct pd_uuid_state {
uint64_t timestamp, node;
uint16_t clock_sequence;
int available;
+ void *rng_state;
+ unsigned char uuid[16];
+
int (*get_lock)(void *);
int (*release_lock)(void *);
void *lock_data;
/* TODO hook for a random number generator? */
unsigned long (*random_bytes)(void *out, unsigned long outlen,
void *prng_state);
- void *rng_state;
};
struct pd_uuid {
int pd_set_uuid_hash(pd_uuid_t *s, void *hash, int version);
int pd_uuid_set_string(pd_uuid_t *uuid, char *s);
+char *pd_uuid_get_string(pd_uuid_t *uuid, char *s);
unsigned long pd_uuid_rng_get_bytes(unsigned char *out, unsigned long outlen);