cdr_adaptive_odbc.c

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/*
 * Asterisk -- An open source telephony toolkit.
 *
 * Copyright (C) 2007, Tilghman Lesher
 *
 * Tilghman Lesher <[email protected]>
 *
 * 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 Adaptive ODBC CDR backend
 *
 * \author Tilghman Lesher <[email protected]>
 * \ingroup cdr_drivers
 */

/*! \li \ref cdr_adaptive_odbc.c uses the configuration file \ref cdr_adaptive_odbc.conf
 * \addtogroup configuration_file Configuration Files
 */

/*!
 * \page cdr_adaptive_odbc.conf cdr_adaptive_odbc.conf
 * \verbinclude cdr_adaptive_odbc.conf.sample
 */

/*** MODULEINFO
 <depend>res_odbc</depend>
 <depend>generic_odbc</depend>
 <support_level>core</support_level>
 ***/

#include "asterisk.h"

#include <sys/types.h>
#include <time.h>

#include <sql.h>
#include <sqlext.h>
#include <sqltypes.h>

#include "asterisk/config.h"
#include "asterisk/channel.h"
#include "asterisk/lock.h"
#include "asterisk/linkedlists.h"
#include "asterisk/res_odbc.h"
#include "asterisk/cdr.h"
#include "asterisk/module.h"

#define CONFIG "cdr_adaptive_odbc.conf"

static const char name[] = "Adaptive ODBC";
/* Optimization to reduce number of memory allocations */
static int maxsize = 512, maxsize2 = 512;

struct columns {
 char *name;
 char *cdrname;
 char *filtervalue;
 char *staticvalue;
 SQLSMALLINT type;
 SQLINTEGER size;
 SQLSMALLINT decimals;
 SQLSMALLINT radix;
 SQLSMALLINT nullable;
 SQLINTEGER octetlen;
 AST_LIST_ENTRY(columns) list;
 unsigned int negatefiltervalue:1;
};

struct tables {
 char *connection;
 char *table;
 char *schema;
 char quoted_identifiers;
 unsigned int usegmtime:1;
 AST_LIST_HEAD_NOLOCK(odbc_columns, columns) columns;
 AST_RWLIST_ENTRY(tables) list;
};

static AST_RWLIST_HEAD_STATIC(odbc_tables, tables);

static int load_config(void)
{
 struct ast_config *cfg;
 struct ast_variable *var;
 const char *tmp, *catg;
 struct tables *tableptr;
 struct columns *entry;
 struct odbc_obj *obj;
 char columnname[80];
 char connection[40];
 char table[40];
 char schema[40];
 char quoted_identifiers;
 int lenconnection, lentable, lenschema, usegmtime = 0;
 SQLLEN sqlptr;
 int res = 0;
 SQLHSTMT stmt = NULL;
 struct ast_flags config_flags = { 0 }; /* Part of our config comes from the database */

 cfg = ast_config_load(CONFIG, config_flags);
 if (!cfg || cfg == CONFIG_STATUS_FILEINVALID) {
 ast_log(LOG_WARNING, "Unable to load " CONFIG ". No adaptive ODBC CDRs.\n");
 return -1;
 }

 for (catg = ast_category_browse(cfg, NULL); catg; catg = ast_category_browse(cfg, catg)) {
 var = ast_variable_browse(cfg, catg);
 if (!var)
 continue;

 if (ast_strlen_zero(tmp = ast_variable_retrieve(cfg, catg, "connection"))) {
 ast_log(LOG_WARNING, "No connection parameter found in '%s'. Skipping.\n", catg);
 continue;
 }
 ast_copy_string(connection, tmp, sizeof(connection));
 lenconnection = strlen(connection);

 if (!ast_strlen_zero(tmp = ast_variable_retrieve(cfg, catg, "usegmtime"))) {
 usegmtime = ast_true(tmp);
 }

 /* When loading, we want to be sure we can connect. */
 obj = ast_odbc_request_obj(connection, 1);
 if (!obj) {
 ast_log(LOG_WARNING, "No such connection '%s' in the '%s' section of " CONFIG ". Check res_odbc.conf.\n", connection, catg);
 continue;
 }

 if (ast_strlen_zero(tmp = ast_variable_retrieve(cfg, catg, "table"))) {
 ast_log(LOG_NOTICE, "No table name found. Assuming 'cdr'.\n");
 tmp = "cdr";
 }
 ast_copy_string(table, tmp, sizeof(table));
 lentable = strlen(table);

 if (ast_strlen_zero(tmp = ast_variable_retrieve(cfg, catg, "schema"))) {
 tmp = "";
 }
 ast_copy_string(schema, tmp, sizeof(schema));
 lenschema = strlen(schema);

 if (ast_strlen_zero(tmp = ast_variable_retrieve(cfg, catg, "quoted_identifiers"))) {
 tmp = "";
 }
 quoted_identifiers = tmp[0];
 if (strlen(tmp) > 1) {
 ast_log(LOG_ERROR, "The quoted_identifiers setting only accepts a single character,"
 " while a value of '%s' was provided. This option has been disabled as a result.\n", tmp);
 quoted_identifiers = '\0';
 }

 res = SQLAllocHandle(SQL_HANDLE_STMT, obj->con, &stmt);
 if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
 ast_log(LOG_WARNING, "SQL Alloc Handle failed on connection '%s'!\n", connection);
 ast_odbc_release_obj(obj);
 continue;
 }

 res = SQLColumns(stmt, NULL, 0, lenschema == 0 ? NULL : (unsigned char *)schema, SQL_NTS, (unsigned char *)table, SQL_NTS, (unsigned char *)"%", SQL_NTS);
 if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
 ast_log(LOG_ERROR, "Unable to query database columns on connection '%s'. Skipping.\n", connection);
 SQLFreeHandle(SQL_HANDLE_STMT, stmt);
 ast_odbc_release_obj(obj);
 continue;
 }

 tableptr = ast_calloc(sizeof(char), sizeof(*tableptr) + lenconnection + 1 + lentable + 1 + lenschema + 1 + 1);
 if (!tableptr) {
 ast_log(LOG_ERROR, "Out of memory creating entry for table '%s' on connection '%s'%s%s%s\n", table, connection,
 lenschema ? " (schema '" : "", lenschema ? schema : "", lenschema ? "')" : "");
 SQLFreeHandle(SQL_HANDLE_STMT, stmt);
 ast_odbc_release_obj(obj);
 res = -1;
 break;
 }

 tableptr->usegmtime = usegmtime;
 tableptr->connection = (char *)tableptr + sizeof(*tableptr);
 tableptr->table = (char *)tableptr + sizeof(*tableptr) + lenconnection + 1;
 tableptr->schema = (char *)tableptr + sizeof(*tableptr) + lenconnection + 1 + lentable + 1;
 ast_copy_string(tableptr->connection, connection, lenconnection + 1);
 ast_copy_string(tableptr->table, table, lentable + 1);
 ast_copy_string(tableptr->schema, schema, lenschema + 1);
 tableptr->quoted_identifiers = quoted_identifiers;

 ast_verb(3, "Found adaptive CDR table %s@%s.\n", tableptr->table, tableptr->connection);

 /* Check for filters first */
 for (var = ast_variable_browse(cfg, catg); var; var = var->next) {
 if (strncmp(var->name, "filter", 6) == 0) {
 int negate = 0;
 char *cdrvar = ast_strdupa(var->name + 6);
 cdrvar = ast_strip(cdrvar);
 if (cdrvar[strlen(cdrvar) - 1] == '!') {
 negate = 1;
 cdrvar[strlen(cdrvar) - 1] = '\0';
 ast_trim_blanks(cdrvar);
 }

 ast_verb(3, "Found filter %s'%s' for CDR variable %s in %s@%s\n", negate ? "!" : "", var->value, cdrvar, tableptr->table, tableptr->connection);

 entry = ast_calloc(sizeof(char), sizeof(*entry) + strlen(cdrvar) + 1 + strlen(var->value) + 1);
 if (!entry) {
 ast_log(LOG_ERROR, "Out of memory creating filter entry for CDR variable '%s' in table '%s' on connection '%s'\n", cdrvar, table, connection);
 res = -1;
 break;
 }

 /* NULL column entry means this isn't a column in the database */
 entry->name = NULL;
 entry->cdrname = (char *)entry + sizeof(*entry);
 entry->filtervalue = (char *)entry + sizeof(*entry) + strlen(cdrvar) + 1;
 strcpy(entry->cdrname, cdrvar);
 strcpy(entry->filtervalue, var->value);
 entry->negatefiltervalue = negate;

 AST_LIST_INSERT_TAIL(&(tableptr->columns), entry, list);
 }
 }

 while ((res = SQLFetch(stmt)) != SQL_NO_DATA && res != SQL_ERROR) {
 char *cdrvar = "", *staticvalue = "";

 SQLGetData(stmt, 4, SQL_C_CHAR, columnname, sizeof(columnname), &sqlptr);

 /* Is there an alias for this column? */

 /* NOTE: This seems like a non-optimal parse method, but I'm going
 * for user configuration readability, rather than fast parsing. We
 * really don't parse this file all that often, anyway.
 */
 for (var = ast_variable_browse(cfg, catg); var; var = var->next) {
 if (strncmp(var->name, "alias", 5) == 0 && strcasecmp(var->value, columnname) == 0) {
 char *alias = ast_strdupa(var->name + 5);
 cdrvar = ast_strip(alias);
 ast_verb(3, "Found alias %s for column %s in %s@%s\n", cdrvar, columnname, tableptr->table, tableptr->connection);
 break;
 } else if (strncmp(var->name, "static", 6) == 0 && strcasecmp(var->value, columnname) == 0) {
 char *item = ast_strdupa(var->name + 6);
 item = ast_strip(item);
 if (item[0] == '"' && item[strlen(item) - 1] == '"') {
 /* Remove surrounding quotes */
 item[strlen(item) - 1] = '\0';
 item++;
 }
 staticvalue = item;
 }
 }

 entry = ast_calloc(sizeof(char), sizeof(*entry) + strlen(columnname) + 1 + strlen(cdrvar) + 1 + strlen(staticvalue) + 1);
 if (!entry) {
 ast_log(LOG_ERROR, "Out of memory creating entry for column '%s' in table '%s' on connection '%s'\n", columnname, table, connection);
 res = -1;
 SQLFreeHandle(SQL_HANDLE_STMT, stmt);
 break;
 }
 entry->name = (char *)entry + sizeof(*entry);
 strcpy(entry->name, columnname);

 if (!ast_strlen_zero(cdrvar)) {
 entry->cdrname = entry->name + strlen(columnname) + 1;
 strcpy(entry->cdrname, cdrvar);
 } else { /* Point to same place as the column name */
 entry->cdrname = (char *)entry + sizeof(*entry);
 }

 if (!ast_strlen_zero(staticvalue)) {
 entry->staticvalue = entry->cdrname + strlen(entry->cdrname) + 1;
 strcpy(entry->staticvalue, staticvalue);
 }

 SQLGetData(stmt, 5, SQL_C_SHORT, &entry->type, sizeof(entry->type), NULL);
 SQLGetData(stmt, 7, SQL_C_LONG, &entry->size, sizeof(entry->size), NULL);
 SQLGetData(stmt, 9, SQL_C_SHORT, &entry->decimals, sizeof(entry->decimals), NULL);
 SQLGetData(stmt, 10, SQL_C_SHORT, &entry->radix, sizeof(entry->radix), NULL);
 SQLGetData(stmt, 11, SQL_C_SHORT, &entry->nullable, sizeof(entry->nullable), NULL);
 SQLGetData(stmt, 16, SQL_C_LONG, &entry->octetlen, sizeof(entry->octetlen), NULL);

 /* Specification states that the octenlen should be the maximum number of bytes
 * returned in a char or binary column, but it seems that some drivers just set
 * it to NULL. (Bad Postgres! No biscuit!) */
 if (entry->octetlen == 0)
 entry->octetlen = entry->size;

 ast_verb(4, "Found %s column with type %hd with len %ld, octetlen %ld, and numlen (%hd,%hd)\n", entry->name, entry->type, (long) entry->size, (long) entry->octetlen, entry->decimals, entry->radix);
 /* Insert column info into column list */
 AST_LIST_INSERT_TAIL(&(tableptr->columns), entry, list);
 res = 0;
 }

 SQLFreeHandle(SQL_HANDLE_STMT, stmt);
 ast_odbc_release_obj(obj);

 if (AST_LIST_FIRST(&(tableptr->columns)))
 AST_RWLIST_INSERT_TAIL(&odbc_tables, tableptr, list);
 else
 ast_free(tableptr);
 }
 ast_config_destroy(cfg);
 return res;
}

static int free_config(void)
{
 struct tables *table;
 struct columns *entry;
 while ((table = AST_RWLIST_REMOVE_HEAD(&odbc_tables, list))) {
 while ((entry = AST_LIST_REMOVE_HEAD(&(table->columns), list))) {
 ast_free(entry);
 }
 ast_free(table);
 }
 return 0;
}

static SQLHSTMT generic_prepare(struct odbc_obj *obj, void *data)
{
 int res, i;
 SQLHSTMT stmt;
 SQLINTEGER nativeerror = 0, numfields = 0;
 SQLSMALLINT diagbytes = 0;
 unsigned char state[10], diagnostic[256];

 res = SQLAllocHandle (SQL_HANDLE_STMT, obj->con, &stmt);
 if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
 ast_log(LOG_WARNING, "SQL Alloc Handle failed!\n");
 return NULL;
 }

 res = ast_odbc_prepare(obj, stmt, data);
 if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
 ast_log(LOG_WARNING, "SQL Prepare failed![%s]\n", (char *) data);
 SQLGetDiagField(SQL_HANDLE_STMT, stmt, 1, SQL_DIAG_NUMBER, &numfields, SQL_IS_INTEGER, &diagbytes);
 for (i = 0; i < numfields; i++) {
 SQLGetDiagRec(SQL_HANDLE_STMT, stmt, i + 1, state, &nativeerror, diagnostic, sizeof(diagnostic), &diagbytes);
 ast_log(LOG_WARNING, "SQL Execute returned an error %d: %s: %s (%d)\n", res, state, diagnostic, diagbytes);
 if (i > 10) {
 ast_log(LOG_WARNING, "Oh, that was good. There are really %d diagnostics?\n", (int)numfields);
 break;
 }
 }
 SQLFreeHandle (SQL_HANDLE_STMT, stmt);
 return NULL;
 }

 return stmt;
}

#define LENGTHEN_BUF(size, var_sql) \
 do { \
 /* Lengthen buffer, if necessary */ \
 if (ast_str_strlen(var_sql) + size + 1 > ast_str_size(var_sql)) { \
 if (ast_str_make_space(&var_sql, ((ast_str_size(var_sql) + size + 1) / 512 + 1) * 512) != 0) { \
 ast_log(LOG_ERROR, "Unable to allocate sufficient memory. Insert CDR '%s:%s' failed.\n", tableptr->connection, tableptr->table); \
 ast_free(sql); \
 ast_free(sql2); \
 AST_RWLIST_UNLOCK(&odbc_tables); \
 return -1; \
 } \
 } \
 } while (0)

#define LENGTHEN_BUF1(size) \
 LENGTHEN_BUF(size, sql);
#define LENGTHEN_BUF2(size) \
 LENGTHEN_BUF(size, sql2);

static int odbc_log(struct ast_cdr *cdr)
{
 struct tables *tableptr;
 struct columns *entry;
 struct odbc_obj *obj;
 struct ast_str *sql = ast_str_create(maxsize), *sql2 = ast_str_create(maxsize2);
 char *tmp;
 char colbuf[1024], *colptr;
 SQLHSTMT stmt = NULL;
 SQLLEN rows = 0;
 char *separator;
 int quoted = 0;

 if (!sql || !sql2) {
 if (sql)
 ast_free(sql);
 if (sql2)
 ast_free(sql2);
 return -1;
 }

 if (AST_RWLIST_RDLOCK(&odbc_tables)) {
 ast_log(LOG_ERROR, "Unable to lock table list. Insert CDR(s) failed.\n");
 ast_free(sql);
 ast_free(sql2);
 return -1;
 }

 AST_LIST_TRAVERSE(&odbc_tables, tableptr, list) {
 separator = "";

 quoted = 0;
 if (tableptr->quoted_identifiers != '\0'){
 quoted = 1;
 }

 if (ast_strlen_zero(tableptr->schema)) {
 if (quoted) {
 ast_str_set(&sql, 0, "INSERT INTO %c%s%c (",
 tableptr->quoted_identifiers, tableptr->table, tableptr->quoted_identifiers );
 }else{
 ast_str_set(&sql, 0, "INSERT INTO %s (", tableptr->table);
 }
 } else {
 if (quoted) {
 ast_str_set(&sql, 0, "INSERT INTO %c%s%c.%c%s%c (",
 tableptr->quoted_identifiers, tableptr->schema, tableptr->quoted_identifiers,
 tableptr->quoted_identifiers, tableptr->table, tableptr->quoted_identifiers);
 }else{
 ast_str_set(&sql, 0, "INSERT INTO %s.%s (", tableptr->schema, tableptr->table);
 }
 }
 ast_str_set(&sql2, 0, " VALUES (");

 /* No need to check the connection now; we'll handle any failure in prepare_and_execute */
 if (!(obj = ast_odbc_request_obj(tableptr->connection, 0))) {
 ast_log(LOG_WARNING, "cdr_adaptive_odbc: Unable to retrieve database handle for '%s:%s'. CDR failed: %s\n", tableptr->connection, tableptr->table, ast_str_buffer(sql));
 continue;
 }

 AST_LIST_TRAVERSE(&(tableptr->columns), entry, list) {
 int datefield = 0;
 if (strcasecmp(entry->cdrname, "start") == 0) {
 datefield = 1;
 } else if (strcasecmp(entry->cdrname, "answer") == 0) {
 datefield = 2;
 } else if (strcasecmp(entry->cdrname, "end") == 0) {
 datefield = 3;
 }

 /* Check if we have a similarly named variable */
 if (entry->staticvalue) {
 colptr = ast_strdupa(entry->staticvalue);
 } else if (datefield && tableptr->usegmtime) {
 struct timeval date_tv = (datefield == 1) ? cdr->start : (datefield == 2) ? cdr->answer : cdr->end;
 struct ast_tm tm = { 0, };
 ast_localtime(&date_tv, &tm, "UTC");
 ast_strftime(colbuf, sizeof(colbuf), "%Y-%m-%d %H:%M:%S", &tm);
 colptr = colbuf;
 } else {
 ast_cdr_format_var(cdr, entry->cdrname, &colptr, colbuf, sizeof(colbuf), datefield ? 0 : 1);
 }

 if (colptr) {
 /* Check first if the column filters this entry. Note that this
 * is very specifically NOT ast_strlen_zero(), because the filter
 * could legitimately specify that the field is blank, which is
 * different from the field being unspecified (NULL). */
 if ((entry->filtervalue && !entry->negatefiltervalue && strcasecmp(colptr, entry->filtervalue) != 0) ||
 (entry->filtervalue && entry->negatefiltervalue && strcasecmp(colptr, entry->filtervalue) == 0)) {
 ast_verb(4, "CDR column '%s' with value '%s' does not match filter of"
 " %s'%s'. Cancelling this CDR.\n",
 entry->cdrname, colptr, entry->negatefiltervalue ? "!" : "", entry->filtervalue);
 goto early_release;
 }

 /* Only a filter? */
 if (ast_strlen_zero(entry->name))
 continue;

 LENGTHEN_BUF1(strlen(entry->name));

 switch (entry->type) {
 case SQL_CHAR:
 case SQL_VARCHAR:
 case SQL_LONGVARCHAR:
#ifdef HAVE_ODBC_WCHAR
 case SQL_WCHAR:
 case SQL_WVARCHAR:
 case SQL_WLONGVARCHAR:
#endif
 case SQL_BINARY:
 case SQL_VARBINARY:
 case SQL_LONGVARBINARY:
 case SQL_GUID:
 /* For these two field names, get the rendered form, instead of the raw
 * form (but only when we're dealing with a character-based field).
 */
 if (strcasecmp(entry->name, "disposition") == 0) {
 ast_cdr_format_var(cdr, entry->name, &colptr, colbuf, sizeof(colbuf), 0);
 } else if (strcasecmp(entry->name, "amaflags") == 0) {
 ast_cdr_format_var(cdr, entry->name, &colptr, colbuf, sizeof(colbuf), 0);
 }

 /* Truncate too-long fields */
 if (entry->type != SQL_GUID) {
 if (strlen(colptr) > entry->octetlen) {
 colptr[entry->octetlen] = '\0';
 }
 }

 LENGTHEN_BUF2(strlen(colptr));

 /* Encode value, with escaping */
 ast_str_append(&sql2, 0, "%s'", separator);
 for (tmp = colptr; *tmp; tmp++) {
 if (*tmp == '\'') {
 ast_str_append(&sql2, 0, "''");
 } else if (*tmp == '\\' && ast_odbc_backslash_is_escape(obj)) {
 ast_str_append(&sql2, 0, "\\\\");
 } else {
 ast_str_append(&sql2, 0, "%c", *tmp);
 }
 }
 ast_str_append(&sql2, 0, "'");
 break;
 case SQL_TYPE_DATE:
 if (ast_strlen_zero(colptr)) {
 continue;
 } else {
 int year = 0, month = 0, day = 0;
 if (sscanf(colptr, "%4d-%2d-%2d", &year, &month, &day) != 3 || year <= 0 ||
 month <= 0 || month > 12 || day < 0 || day > 31 ||
 ((month == 4 || month == 6 || month == 9 || month == 11) && day == 31) ||
 (month == 2 && year % 400 == 0 && day > 29) ||
 (month == 2 && year % 100 == 0 && day > 28) ||
 (month == 2 && year % 4 == 0 && day > 29) ||
 (month == 2 && year % 4 != 0 && day > 28)) {
 ast_log(LOG_WARNING, "CDR variable %s is not a valid date ('%s').\n", entry->name, colptr);
 continue;
 }

 if (year > 0 && year < 100) {
 year += 2000;
 }

 LENGTHEN_BUF2(17);
 ast_str_append(&sql2, 0, "%s{ d '%04d-%02d-%02d' }", separator, year, month, day);
 }
 break;
 case SQL_TYPE_TIME:
 if (ast_strlen_zero(colptr)) {
 continue;
 } else {
 int hour = 0, minute = 0, second = 0;
 int count = sscanf(colptr, "%2d:%2d:%2d", &hour, &minute, &second);

 if ((count != 2 && count != 3) || hour < 0 || hour > 23 || minute < 0 || minute > 59 || second < 0 || second > 59) {
 ast_log(LOG_WARNING, "CDR variable %s is not a valid time ('%s').\n", entry->name, colptr);
 continue;
 }

 LENGTHEN_BUF2(15);
 ast_str_append(&sql2, 0, "%s{ t '%02d:%02d:%02d' }", separator, hour, minute, second);
 }
 break;
 case SQL_TYPE_TIMESTAMP:
 case SQL_TIMESTAMP:
 if (ast_strlen_zero(colptr)) {
 continue;
 } else {
 int year = 0, month = 0, day = 0, hour = 0, minute = 0, second = 0;
 int count = sscanf(colptr, "%4d-%2d-%2d %2d:%2d:%2d", &year, &month, &day, &hour, &minute, &second);

 if ((count != 3 && count != 5 && count != 6) || year <= 0 ||
 month <= 0 || month > 12 || day < 0 || day > 31 ||
 ((month == 4 || month == 6 || month == 9 || month == 11) && day == 31) ||
 (month == 2 && year % 400 == 0 && day > 29) ||
 (month == 2 && year % 100 == 0 && day > 28) ||
 (month == 2 && year % 4 == 0 && day > 29) ||
 (month == 2 && year % 4 != 0 && day > 28) ||
 hour > 23 || minute > 59 || second > 59 || hour < 0 || minute < 0 || second < 0) {
 ast_log(LOG_WARNING, "CDR variable %s is not a valid timestamp ('%s').\n", entry->name, colptr);
 continue;
 }

 if (year > 0 && year < 100) {
 year += 2000;
 }

 LENGTHEN_BUF2(26);
 ast_str_append(&sql2, 0, "%s{ ts '%04d-%02d-%02d %02d:%02d:%02d' }", separator, year, month, day, hour, minute, second);
 }
 break;
 case SQL_INTEGER:
 if (ast_strlen_zero(colptr)) {
 continue;
 } else {
 int integer = 0;
 if (sscanf(colptr, "%30d", &integer) != 1) {
 ast_log(LOG_WARNING, "CDR variable %s is not an integer.\n", entry->name);
 continue;
 }

 LENGTHEN_BUF2(12);
 ast_str_append(&sql2, 0, "%s%d", separator, integer);
 }
 break;
 case SQL_BIGINT:
 if (ast_strlen_zero(colptr)) {
 continue;
 } else {
 long long integer = 0;
 if (sscanf(colptr, "%30lld", &integer) != 1) {
 ast_log(LOG_WARNING, "CDR variable %s is not an integer.\n", entry->name);
 continue;
 }

 LENGTHEN_BUF2(24);
 ast_str_append(&sql2, 0, "%s%lld", separator, integer);
 }
 break;
 case SQL_SMALLINT:
 if (ast_strlen_zero(colptr)) {
 continue;
 } else {
 short integer = 0;
 if (sscanf(colptr, "%30hd", &integer) != 1) {
 ast_log(LOG_WARNING, "CDR variable %s is not an integer.\n", entry->name);
 continue;
 }

 LENGTHEN_BUF2(6);
 ast_str_append(&sql2, 0, "%s%d", separator, integer);
 }
 break;
 case SQL_TINYINT:
 if (ast_strlen_zero(colptr)) {
 continue;
 } else {
 signed char integer = 0;
 if (sscanf(colptr, "%30hhd", &integer) != 1) {
 ast_log(LOG_WARNING, "CDR variable %s is not an integer.\n", entry->name);
 continue;
 }

 LENGTHEN_BUF2(4);
 ast_str_append(&sql2, 0, "%s%d", separator, integer);
 }
 break;
 case SQL_BIT:
 if (ast_strlen_zero(colptr)) {
 continue;
 } else {
 signed char integer = 0;
 if (sscanf(colptr, "%30hhd", &integer) != 1) {
 ast_log(LOG_WARNING, "CDR variable %s is not an integer.\n", entry->name);
 continue;
 }
 if (integer != 0)
 integer = 1;

 LENGTHEN_BUF2(2);
 ast_str_append(&sql2, 0, "%s%d", separator, integer);
 }
 break;
 case SQL_NUMERIC:
 case SQL_DECIMAL:
 if (ast_strlen_zero(colptr)) {
 continue;
 } else {
 double number = 0.0;

 if (!strcasecmp(entry->cdrname, "billsec")) {
 if (!ast_tvzero(cdr->answer)) {
 snprintf(colbuf, sizeof(colbuf), "%lf",
 (double) (ast_tvdiff_us(cdr->end, cdr->answer) / 1000000.0));
 } else {
 ast_copy_string(colbuf, "0", sizeof(colbuf));
 }
 } else if (!strcasecmp(entry->cdrname, "duration")) {
 snprintf(colbuf, sizeof(colbuf), "%lf",
 (double) (ast_tvdiff_us(cdr->end, cdr->start) / 1000000.0));

 if (!ast_strlen_zero(colbuf)) {
 colptr = colbuf;
 }
 }

 if (sscanf(colptr, "%30lf", &number) != 1) {
 ast_log(LOG_WARNING, "CDR variable %s is not an numeric type.\n", entry->name);
 continue;
 }

 LENGTHEN_BUF2(entry->decimals);
 ast_str_append(&sql2, 0, "%s%*.*lf", separator, entry->decimals, entry->radix, number);
 }
 break;
 case SQL_FLOAT:
 case SQL_REAL:
 case SQL_DOUBLE:
 if (ast_strlen_zero(colptr)) {
 continue;
 } else {
 double number = 0.0;

 if (!strcasecmp(entry->cdrname, "billsec")) {
 if (!ast_tvzero(cdr->answer)) {
 snprintf(colbuf, sizeof(colbuf), "%lf",
 (double) (ast_tvdiff_us(cdr->end, cdr->answer) / 1000000.0));
 } else {
 ast_copy_string(colbuf, "0", sizeof(colbuf));
 }
 } else if (!strcasecmp(entry->cdrname, "duration")) {
 snprintf(colbuf, sizeof(colbuf), "%lf",
 (double) (ast_tvdiff_us(cdr->end, cdr->start) / 1000000.0));

 if (!ast_strlen_zero(colbuf)) {
 colptr = colbuf;
 }
 }

 if (sscanf(colptr, "%30lf", &number) != 1) {
 ast_log(LOG_WARNING, "CDR variable %s is not an numeric type.\n", entry->name);
 continue;
 }

 LENGTHEN_BUF2(entry->decimals);
 ast_str_append(&sql2, 0, "%s%lf", separator, number);
 }
 break;
 default:
 ast_log(LOG_WARNING, "Column type %d (field '%s:%s:%s') is unsupported at this time.\n", entry->type, tableptr->connection, tableptr->table, entry->name);
 continue;
 }
 if (quoted) {
 ast_str_append(&sql, 0, "%s%c%s%c", separator, tableptr->quoted_identifiers, entry->name, tableptr->quoted_identifiers);
 } else {
 ast_str_append(&sql, 0, "%s%s", separator, entry->name);
 }
 separator = ", ";
 } else if (entry->filtervalue
 && ((!entry->negatefiltervalue && entry->filtervalue[0] != '\0')
 || (entry->negatefiltervalue && entry->filtervalue[0] == '\0'))) {
 ast_log(AST_LOG_WARNING, "CDR column '%s' was not set and does not match filter of"
 " %s'%s'. Cancelling this CDR.\n",
 entry->cdrname, entry->negatefiltervalue ? "!" : "",
 entry->filtervalue);
 goto early_release;
 }
 }

 /* Concatenate the two constructed buffers */
 LENGTHEN_BUF1(ast_str_strlen(sql2));
 ast_str_append(&sql, 0, ")");
 ast_str_append(&sql2, 0, ")");
 ast_str_append(&sql, 0, "%s", ast_str_buffer(sql2));

 ast_debug(3, "Executing [%s]\n", ast_str_buffer(sql));

 stmt = ast_odbc_prepare_and_execute(obj, generic_prepare, ast_str_buffer(sql));
 if (stmt) {
 SQLRowCount(stmt, &rows);
 SQLFreeHandle(SQL_HANDLE_STMT, stmt);
 }
 if (rows == 0) {
 ast_log(LOG_WARNING, "cdr_adaptive_odbc: Insert failed on '%s:%s'. CDR failed: %s\n", tableptr->connection, tableptr->table, ast_str_buffer(sql));
 }
early_release:
 ast_odbc_release_obj(obj);
 }
 AST_RWLIST_UNLOCK(&odbc_tables);

 /* Next time, just allocate buffers that are that big to start with. */
 if (ast_str_strlen(sql) > maxsize) {
 maxsize = ast_str_strlen(sql);
 }
 if (ast_str_strlen(sql2) > maxsize2) {
 maxsize2 = ast_str_strlen(sql2);
 }

 ast_free(sql);
 ast_free(sql2);
 return 0;
}

static int unload_module(void)
{
 if (ast_cdr_unregister(name)) {
 return -1;
 }

 if (AST_RWLIST_WRLOCK(&odbc_tables)) {
 ast_cdr_register(name, ast_module_info->description, odbc_log);
 ast_log(LOG_ERROR, "Unable to lock column list. Unload failed.\n");
 return -1;
 }

 free_config();
 AST_RWLIST_UNLOCK(&odbc_tables);
 return 0;
}

static int load_module(void)
{
 if (AST_RWLIST_WRLOCK(&odbc_tables)) {
 ast_log(LOG_ERROR, "Unable to lock column list. Load failed.\n");
 return 0;
 }

 load_config();
 AST_RWLIST_UNLOCK(&odbc_tables);
 ast_cdr_register(name, ast_module_info->description, odbc_log);
 return 0;
}

static int reload(void)
{
 if (AST_RWLIST_WRLOCK(&odbc_tables)) {
 ast_log(LOG_ERROR, "Unable to lock column list. Reload failed.\n");
 return -1;
 }

 free_config();
 load_config();
 AST_RWLIST_UNLOCK(&odbc_tables);
 return 0;
}

AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_LOAD_ORDER, "Adaptive ODBC CDR backend",
 .support_level = AST_MODULE_SUPPORT_CORE,
 .load = load_module,
 .unload = unload_module,
 .reload = reload,
 .load_pri = AST_MODPRI_CDR_DRIVER,
 .requires = "cdr,res_odbc",
);