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/**
* @file modules/uuid/uuid.c Generate and load UUID
*
* Copyright (C) 2010 Creytiv.com
*/
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <re.h>
#include <baresip.h>
/**
* @defgroup uuid uuid
*
* UUID generator and loader
*/
enum { UUID_LEN = 36 };
static int generate_random_uuid(FILE *f)
{
if (re_fprintf(f, "%08x-%04x-%04x-%04x-%08x%04x",
rand_u32(), rand_u16(), rand_u16(), rand_u16(),
rand_u32(), rand_u16()) != UUID_LEN)
return ENOMEM;
return 0;
}
static int uuid_init(const char *file)
{
FILE *f = NULL;
int err = 0;
f = fopen(file, "r");
if (f) {
err = 0;
goto out;
}
f = fopen(file, "w");
if (!f) {
err = errno;
warning("uuid: fopen() %s (%m)\n", file, err);
goto out;
}
err = generate_random_uuid(f);
if (err) {
warning("uuid: generate random UUID failed (%m)\n", err);
goto out;
}
info("uuid: generated new UUID in %s\n", file);
out:
if (f)
fclose(f);
return err;
}
static int uuid_load(const char *file, char *uuid, size_t sz)
{
FILE *f = NULL;
int err = 0;
f = fopen(file, "r");
if (!f)
return errno;
if (!fgets(uuid, (int)sz, f))
err = errno;
(void)fclose(f);
debug("uuid: loaded UUID %s from file %s\n", uuid, file);
return err;
}
static int module_init(void)
{
struct config *cfg = conf_config();
char path[256];
int err = 0;
err = conf_path_get(path, sizeof(path));
if (err)
return err;
strncat(path, "/uuid", sizeof(path) - strlen(path) - 1);
err = uuid_init(path);
if (err)
return err;
err = uuid_load(path, cfg->sip.uuid, sizeof(cfg->sip.uuid));
if (err)
return err;
return 0;
}
EXPORT_SYM const struct mod_export DECL_EXPORTS(uuid) = {
"uuid",
NULL,
module_init,
NULL
};
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