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uuid_mod.c
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uuid_mod.c
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/**
* Copyright (C) 2014 Daniel-Constantin Mierla (asipto.com)
*
* This file is part of Kamailio, a free SIP server.
*
* This file is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version
*
*
* This file is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <uuid/uuid.h>
#include "../../core/sr_module.h"
#include "../../core/dprint.h"
#include "../../core/ut.h"
#include "../../core/pvar.h"
#include "../../core/kemi.h"
#include "../../core/utils/sruid.h"
MODULE_VERSION
#ifdef UUID_LEN_STR
#define KSR_UUID_BSIZE (UUID_LEN_STR + 4)
#else
#define KSR_UUID_BSIZE 40
#endif
static int mod_init(void);
static int child_init(int);
static void mod_destroy(void);
static uuid_t _k_uuid_val;
static char _k_uuid_str[KSR_UUID_BSIZE];
int pv_get_uuid(sip_msg_t *msg, pv_param_t *param, pv_value_t *res);
int pv_parse_uuid_name(pv_spec_p sp, str *in);
static pv_export_t mod_pvs[] = {
{{"uuid", (sizeof("uuid") - 1)}, PVT_OTHER, pv_get_uuid, 0,
pv_parse_uuid_name, 0, 0, 0},
{{0, 0}, 0, 0, 0, 0, 0, 0, 0}};
static cmd_export_t cmds[] = {{0, 0, 0, 0, 0, 0}};
static param_export_t params[] = {{0, 0, 0}};
struct module_exports exports = {
"uuid", /* module name */
DEFAULT_DLFLAGS, /* dlopen flags */
cmds, /* exported functions */
params, /* exported parameters */
0, /* exported rpc functions */
mod_pvs, /* exported pseudo-variables */
0, /* response handling function */
mod_init, /* module init function */
child_init, /* per child init function */
mod_destroy /* destroy function */
};
/**
* init module function
*/
static int mod_init(void)
{
uuid_generate(_k_uuid_val);
_k_uuid_str[0] = '\0';
uuid_unparse_lower(_k_uuid_val, _k_uuid_str);
LM_DBG("uuid initialized - probing value [%s]\n", _k_uuid_str);
uuid_clear(_k_uuid_val);
_k_uuid_str[0] = '\0';
return 0;
}
/**
* @brief Initialize async module children
*/
static int child_init(int rank)
{
if(rank != PROC_MAIN)
return 0;
return 0;
}
/**
* destroy module function
*/
static void mod_destroy(void)
{
uuid_generate(_k_uuid_val);
uuid_clear(_k_uuid_val);
}
/**
* parse the name of the $uuid(name)
*/
int pv_parse_uuid_name(pv_spec_p sp, str *in)
{
if(sp == NULL || in == NULL || in->len <= 0)
return -1;
switch(in->s[0]) {
case 'g':
case 'G':
sp->pvp.pvn.u.isname.name.n = 0;
break;
case 'r':
case 'R':
sp->pvp.pvn.u.isname.name.n = 1;
break;
case 't':
case 'T':
sp->pvp.pvn.u.isname.name.n = 2;
break;
case 's':
case 'S':
sp->pvp.pvn.u.isname.name.n = 3;
break;
default:
sp->pvp.pvn.u.isname.name.n = 0;
}
sp->pvp.pvn.type = PV_NAME_INTSTR;
sp->pvp.pvn.u.isname.type = 0;
return 0;
}
/**
* return the value of $uuid(name)
*/
int pv_get_uuid(sip_msg_t *msg, pv_param_t *param, pv_value_t *res)
{
if(param == NULL)
return -1;
switch(param->pvn.u.isname.name.n) {
case 1:
uuid_generate_random(_k_uuid_val);
break;
case 2:
uuid_generate_time(_k_uuid_val);
break;
case 3:
#ifndef __OS_darwin
if(uuid_generate_time_safe(_k_uuid_val) != 0) {
LM_ERR("uuid not generated in a safe mode\n");
return pv_get_null(msg, param, res);
}
#else
uuid_generate_time(_k_uuid_val);
#endif
break;
default:
uuid_generate(_k_uuid_val);
}
uuid_unparse_lower(_k_uuid_val, _k_uuid_str);
return pv_get_strzval(msg, param, res, _k_uuid_str);
}
/**
* generate uuid value
*/
static int ksr_uuid_generate(char *out, int *len)
{
if(out == NULL || len == NULL || *len < KSR_UUID_BSIZE) {
return -1;
}
uuid_generate(_k_uuid_val);
uuid_unparse_lower(_k_uuid_val, out);
*len = strlen(out);
return 0;
}
/**
* generate uuid time value
*/
static int ksr_uuid_generate_time(char *out, int *len)
{
if(out == NULL || len == NULL || *len < KSR_UUID_BSIZE) {
return -1;
}
#ifndef __OS_darwin
if(uuid_generate_time_safe(_k_uuid_val) != 0) {
LM_ERR("uuid not generated in a safe mode\n");
return -1;
}
#else
uuid_generate_time(_k_uuid_val);
#endif
uuid_unparse_lower(_k_uuid_val, out);
*len = strlen(out);
return 0;
}
/**
* generate uuid random value
*/
static int ksr_uuid_generate_random(char *out, int *len)
{
if(out == NULL || len == NULL || *len < KSR_UUID_BSIZE) {
return -1;
}
uuid_generate_random(_k_uuid_val);
uuid_unparse_lower(_k_uuid_val, out);
*len = strlen(out);
return 0;
}
/**
*
*/
static sr_kemi_xval_t _ksr_kemi_uuid_xval = {0};
/**
*
*/
static sr_kemi_xval_t *ki_ksr_uuid_get(sip_msg_t *msg)
{
int len = KSR_UUID_BSIZE;
memset(&_ksr_kemi_uuid_xval, 0, sizeof(sr_kemi_xval_t));
if(ksr_uuid_generate(_k_uuid_str, &len)) {
sr_kemi_xval_null(&_ksr_kemi_uuid_xval, SR_KEMI_XVAL_NULL_EMPTY);
return &_ksr_kemi_uuid_xval;
}
_ksr_kemi_uuid_xval.vtype = SR_KEMIP_STR;
_ksr_kemi_uuid_xval.v.s.s = _k_uuid_str;
_ksr_kemi_uuid_xval.v.s.len = len;
return &_ksr_kemi_uuid_xval;
}
/**
*
*/
static sr_kemi_xval_t *ki_ksr_uuid_rget(sip_msg_t *msg)
{
int len = KSR_UUID_BSIZE;
memset(&_ksr_kemi_uuid_xval, 0, sizeof(sr_kemi_xval_t));
if(ksr_uuid_generate_random(_k_uuid_str, &len)) {
sr_kemi_xval_null(&_ksr_kemi_uuid_xval, SR_KEMI_XVAL_NULL_EMPTY);
return &_ksr_kemi_uuid_xval;
}
_ksr_kemi_uuid_xval.vtype = SR_KEMIP_STR;
_ksr_kemi_uuid_xval.v.s.s = _k_uuid_str;
_ksr_kemi_uuid_xval.v.s.len = len;
return &_ksr_kemi_uuid_xval;
}
/**
*
*/
static sr_kemi_xval_t *ki_ksr_uuid_tget(sip_msg_t *msg)
{
int len = KSR_UUID_BSIZE;
memset(&_ksr_kemi_uuid_xval, 0, sizeof(sr_kemi_xval_t));
if(ksr_uuid_generate_time(_k_uuid_str, &len)) {
sr_kemi_xval_null(&_ksr_kemi_uuid_xval, SR_KEMI_XVAL_NULL_EMPTY);
return &_ksr_kemi_uuid_xval;
}
_ksr_kemi_uuid_xval.vtype = SR_KEMIP_STR;
_ksr_kemi_uuid_xval.v.s.s = _k_uuid_str;
_ksr_kemi_uuid_xval.v.s.len = len;
return &_ksr_kemi_uuid_xval;
}
/**
*
*/
/* clang-format off */
static sr_kemi_t sr_kemi_uuid_exports[] = {
{ str_init("uuid"), str_init("get"),
SR_KEMIP_XVAL, ki_ksr_uuid_get,
{ SR_KEMIP_NONE, SR_KEMIP_NONE, SR_KEMIP_NONE,
SR_KEMIP_NONE, SR_KEMIP_NONE, SR_KEMIP_NONE }
},
{ str_init("uuid"), str_init("rget"),
SR_KEMIP_XVAL, ki_ksr_uuid_rget,
{ SR_KEMIP_NONE, SR_KEMIP_NONE, SR_KEMIP_NONE,
SR_KEMIP_NONE, SR_KEMIP_NONE, SR_KEMIP_NONE }
},
{ str_init("uuid"), str_init("tget"),
SR_KEMIP_XVAL, ki_ksr_uuid_tget,
{ SR_KEMIP_NONE, SR_KEMIP_NONE, SR_KEMIP_NONE,
SR_KEMIP_NONE, SR_KEMIP_NONE, SR_KEMIP_NONE }
},
{ {0, 0}, {0, 0}, 0, NULL, { 0, 0, 0, 0, 0, 0 } }
};
/* clang-format on */
/**
*
*/
int mod_register(char *path, int *dlflags, void *p1, void *p2)
{
sruid_uuid_api_t sapi;
memset(&sapi, 0, sizeof(sruid_uuid_api_t));
sapi.fgenerate = ksr_uuid_generate;
sapi.fgenerate_time = ksr_uuid_generate_time;
sapi.fgenerate_random = ksr_uuid_generate_random;
if(sruid_uuid_api_set(&sapi) < 0) {
return -1;
}
sr_kemi_modules_add(sr_kemi_uuid_exports);
return 0;
}