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/*
* Asterisk -- An open source telephony toolkit.
*
* Copyright (C) 1999 - 2007, Digium, Inc.
*
* Mark Spencer <markster@digium.com> and others.
*
* See http://www.asterisk.org for more information about
* the Asterisk project. Please do not directly contact
* any of the maintainers of this project for assistance;
* the project provides a web site, mailing lists and IRC
* channels for your use.
*
* This program is free software, distributed under the terms of
* the GNU General Public License Version 2. See the LICENSE file
* at the top of the source tree.
*/
/*! \file
*
* \brief Custom SQLite3 CDR records.
*
* \author Adapted by Alejandro Rios <alejandro.rios@avatar.com.co> and
* Russell Bryant <russell@digium.com> from
* cdr_mysql_custom by Edward Eastman <ed@dm3.co.uk>,
* and cdr_sqlite by Holger Schurig <hs4233@mail.mn-solutions.de>
*
*
* \arg See also \ref AstCDR
*
*
* \ingroup cdr_drivers
*/
/*** MODULEINFO
<depend>sqlite3</depend>
***/
#include "asterisk.h"
ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
#include <time.h>
#include <sqlite3.h>
#include "asterisk/paths.h" /* use ast_config_AST_LOG_DIR */
#include "asterisk/channel.h"
#include "asterisk/cdr.h"
#include "asterisk/module.h"
#include "asterisk/config.h"
#include "asterisk/pbx.h"
#include "asterisk/utils.h"
#include "asterisk/cli.h"
AST_MUTEX_DEFINE_STATIC(lock);
static const char config_file[] = "cdr_sqlite3_custom.conf";
static char *desc = "Customizable SQLite3 CDR Backend";
static char *name = "cdr_sqlite3_custom";
static sqlite3 *db = NULL;
static char table[80];
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static char *columns;
struct values {
char *expression;
AST_LIST_ENTRY(values) list;
};
static AST_LIST_HEAD_STATIC(sql_values, values);
static int free_config(void);
static int load_column_config(const char *tmp)
{
char *col = NULL;
char *cols = NULL;
char *escaped = NULL;
struct ast_str *column_string = NULL;
if (ast_strlen_zero(tmp)) {
ast_log(LOG_WARNING, "Column names not specified. Module not loaded.\n");
return -1;
}
if (!(column_string = ast_str_create(1024))) {
ast_log(LOG_ERROR, "Out of memory creating temporary buffer for column list for table '%s.'\n", table);
return -1;
}
if (!(cols = ast_strdup(tmp))) {
ast_log(LOG_ERROR, "Out of memory creating temporary buffer for column list for table '%s.'\n", table);
ast_free(column_string);
return -1;
}
while ((col = strsep(&cols, ","))) {
col = ast_strip(col);
escaped = sqlite3_mprintf("%q", col);
if (!escaped) {
ast_log(LOG_ERROR, "Out of memory creating entry for column '%s' in table '%s.'\n", col, table);
ast_free(column_string);
ast_free(cols);
return -1;
}
if (!column_string->used)
ast_str_set(&column_string, 0, escaped);
else
ast_str_append(&column_string, 0, ",%s", escaped);
sqlite3_free(escaped);
}
if (!(columns = ast_strdup(column_string->str))) {
ast_log(LOG_ERROR, "Out of memory copying columns string for table '%s.'\n", table);
ast_free(column_string);
ast_free(cols);
return -1;
}
ast_free(column_string);
ast_free(cols);
return 0;
}
static int load_values_config(const char *tmp)
{
char *val = NULL;
char *vals = NULL;
struct values *value = NULL;
if (ast_strlen_zero(tmp)) {
ast_log(LOG_WARNING, "Values not specified. Module not loaded.\n");
return -1;
}
if (!(vals = ast_strdup(tmp))) {
ast_log(LOG_ERROR, "Out of memory creating temporary buffer for value '%s'\n", tmp);
return -1;
}
while ((val = strsep(&vals, ","))) {
/* Strip the single quotes off if they are there */
val = ast_strip_quoted(val, "'", "'");
value = ast_calloc(sizeof(char), sizeof(*value) + strlen(val) + 1);
if (!value) {
ast_log(LOG_ERROR, "Out of memory creating entry for value '%s'\n", val);
ast_free(vals);
return -1;
}
value->expression = (char *) value + sizeof(*value);
ast_copy_string(value->expression, val, strlen(val) + 1);
AST_LIST_INSERT_TAIL(&sql_values, value, list);
}
ast_free(vals);
return 0;
}
static int load_config(int reload)
{
struct ast_config *cfg;
struct ast_flags config_flags = { reload ? CONFIG_FLAG_FILEUNCHANGED : 0 };
struct ast_variable *mappingvar;
const char *tmp;
if (!(cfg = ast_config_load(config_file, config_flags))) {
ast_log(LOG_WARNING, "Failed to reload configuration file.\n");
else
ast_log(LOG_WARNING, "Failed to load configuration file. Module not activated.\n");
} else if (cfg == CONFIG_STATUS_FILEUNCHANGED)
return 0;
if (reload)
free_config();
ast_mutex_lock(&lock);
if (!(mappingvar = ast_variable_browse(cfg, "master"))) {
/* Nothing configured */
ast_mutex_unlock(&lock);
ast_config_destroy(cfg);
return 0;
}
/* Mapping must have a table name */
tmp = ast_variable_retrieve(cfg, "master", "table");
if (!ast_strlen_zero(tmp))
ast_copy_string(table, tmp, sizeof(table));
else {
ast_log(LOG_WARNING, "Table name not specified. Assuming cdr.\n");
strcpy(table, "cdr");
}
tmp = ast_variable_retrieve(cfg, "master", "columns");
if (load_column_config(tmp)) {
ast_mutex_unlock(&lock);
tmp = ast_variable_retrieve(cfg, "master", "values");
if (load_values_config(tmp)) {
ast_mutex_unlock(&lock);
ast_verb(3, "cdr_sqlite3_custom: Logging CDR records to table '%s' in 'master.db'\n", table);
ast_mutex_unlock(&lock);
ast_config_destroy(cfg);
return 0;
}
static int free_config(void)
struct values *value;
ast_mutex_lock(&lock);
if (db) {
sqlite3_close(db);
db = NULL;
}
if (columns) {
ast_free(columns);
columns = NULL;
while ((value = AST_LIST_REMOVE_HEAD(&sql_values, list)))
ast_free(value);
ast_mutex_unlock(&lock);
return 0;
}
static int sqlite3_log(struct ast_cdr *cdr)
{
int res = 0;
char *error = NULL;
char *sql = NULL;
struct ast_channel dummy = { 0, };
{ /* Make it obvious that only sql should be used outside of this block */
char *escaped;
char subst_buf[2048];
struct values *value;
struct ast_str *value_string = ast_str_create(1024);
AST_LIST_TRAVERSE(&sql_values, value, list) {
memset(subst_buf, 0, sizeof(subst_buf));
pbx_substitute_variables_helper(&dummy, value->expression, subst_buf, sizeof(subst_buf) - 1);
escaped = sqlite3_mprintf("%q", subst_buf);
if (!value_string->used)
ast_str_append(&value_string, 0, "'%s'", escaped);
else
ast_str_append(&value_string, 0, ",'%s'", escaped);
sqlite3_free(escaped);
}
sql = sqlite3_mprintf("INSERT INTO %q (%s) VALUES (%s)", table, columns, value_string->str);
ast_debug(1, "About to log: %s\n", sql);
ast_free(value_string);
}
ast_mutex_lock(&lock);
/* XXX This seems awful arbitrary... */
for (count = 0; count < 5; count++) {
res = sqlite3_exec(db, sql, NULL, NULL, &error);
if (res != SQLITE_BUSY && res != SQLITE_LOCKED)
break;
usleep(200);
}
if (error) {
ast_log(LOG_ERROR, "%s. SQL: %s.\n", error, sql);
sqlite3_free(error);
if (sql)
sqlite3_free(sql);
ast_mutex_unlock(&lock);
return res;
}
static int unload_module(void)
{
ast_cdr_unregister(name);
return 0;
}
static int load_module(void)
{
char *error;
char filename[PATH_MAX];
if (!load_config(0)) {
res = ast_cdr_register(name, desc, sqlite3_log);
if (res) {
ast_log(LOG_ERROR, "Unable to register custom SQLite3 CDR handling\n");
free_config();
return AST_MODULE_LOAD_DECLINE;
}
} else
return AST_MODULE_LOAD_DECLINE;
/* is the database there? */
snprintf(filename, sizeof(filename), "%s/master.db", ast_config_AST_LOG_DIR);
res = sqlite3_open(filename, &db);
if (res != SQLITE_OK) {
ast_log(LOG_ERROR, "Could not open database %s.\n", filename);
free_config();
return AST_MODULE_LOAD_DECLINE;
}
/* is the table there? */
sql = sqlite3_mprintf("SELECT COUNT(AcctId) FROM %q;", table);
res = sqlite3_exec(db, sql, NULL, NULL, NULL);
sqlite3_free(sql);
if (res != SQLITE_OK) {
/* We don't use %q for the column list here since we already escaped when building it */
sql = sqlite3_mprintf("CREATE TABLE %q (AcctId INTEGER PRIMARY KEY, %s)", table, columns);
res = sqlite3_exec(db, sql, NULL, NULL, &error);
sqlite3_free(sql);
if (res != SQLITE_OK) {
ast_log(LOG_WARNING, "Unable to create table '%s': %s.\n", table, error);
sqlite3_free(error);
free_config();
return AST_MODULE_LOAD_DECLINE;
}
}
return 0;
}
static int reload(void)
{
return load_config(1);
}
AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_DEFAULT, "SQLite3 Custom CDR Module",
.load = load_module,
.unload = unload_module,
.reload = reload,
);