git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@7040 65c4cc65-6c06-0410-ace0-fbb531ad65f3
617 lines
15 KiB
C
Executable file
617 lines
15 KiB
C
Executable file
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 1999 - 2005, Digium, Inc.
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*
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* Mark Spencer <markster@digium.com>
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*
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* res_odbc.c <ODBC resource manager>
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* Copyright (C) 2004 - 2005 Anthony Minessale II <anthmct@yahoo.com>
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License Version 2. See the LICENSE file
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* at the top of the source tree.
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*/
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/*! \file
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*
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* \brief ODBC resource manager
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*
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* \arg See also: \ref cdr_odbc
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include "asterisk.h"
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ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
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#include "asterisk/file.h"
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#include "asterisk/logger.h"
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#include "asterisk/channel.h"
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#include "asterisk/config.h"
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#include "asterisk/options.h"
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#include "asterisk/pbx.h"
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#include "asterisk/module.h"
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#include "asterisk/cli.h"
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#include "asterisk/lock.h"
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#include "asterisk/res_odbc.h"
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#define MAX_ODBC_HANDLES 25
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struct odbc_list
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{
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char name[80];
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odbc_obj *obj;
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int used;
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};
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static struct odbc_list ODBC_REGISTRY[MAX_ODBC_HANDLES];
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static void odbc_destroy(void)
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{
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int x = 0;
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for (x = 0; x < MAX_ODBC_HANDLES; x++) {
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if (ODBC_REGISTRY[x].obj) {
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destroy_odbc_obj(&ODBC_REGISTRY[x].obj);
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ODBC_REGISTRY[x].obj = NULL;
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}
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}
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}
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static odbc_obj *odbc_read(struct odbc_list *registry, const char *name)
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{
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int x = 0;
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for (x = 0; x < MAX_ODBC_HANDLES; x++) {
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if (registry[x].used && !strcmp(registry[x].name, name)) {
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return registry[x].obj;
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}
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}
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return NULL;
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}
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static int odbc_write(struct odbc_list *registry, char *name, odbc_obj *obj)
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{
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int x = 0;
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for (x = 0; x < MAX_ODBC_HANDLES; x++) {
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if (!registry[x].used) {
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ast_copy_string(registry[x].name, name, sizeof(registry[x].name));
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registry[x].obj = obj;
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registry[x].used = 1;
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return 1;
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}
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}
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return 0;
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}
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static void odbc_init(void)
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{
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int x = 0;
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for (x = 0; x < MAX_ODBC_HANDLES; x++) {
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memset(&ODBC_REGISTRY[x], 0, sizeof(struct odbc_list));
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}
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}
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static char *tdesc = "ODBC Resource";
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/* internal stuff */
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SQLHSTMT odbc_prepare_and_execute(odbc_obj *obj, SQLHSTMT (*prepare_cb)(odbc_obj *obj, void *data), void *data)
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{
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int res = 0, i, attempt;
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SQLINTEGER nativeerror=0, numfields=0;
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SQLSMALLINT diagbytes=0;
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unsigned char state[10], diagnostic[256];
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SQLHSTMT stmt;
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for (attempt = 0; attempt < 2; attempt++) {
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/* This prepare callback may do more than just prepare -- it may also
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* bind parameters, bind results, etc. The real key, here, is that
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* when we disconnect, all handles become invalid for most databases.
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* We must therefore redo everything when we establish a new
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* connection. */
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stmt = prepare_cb(obj, data);
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if (stmt) {
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res = SQLExecute(stmt);
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if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO) && (res != SQL_NO_DATA)) {
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if (res == SQL_ERROR) {
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SQLGetDiagField(SQL_HANDLE_STMT, stmt, 1, SQL_DIAG_NUMBER, &numfields, SQL_IS_INTEGER, &diagbytes);
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for (i=0; i< numfields + 1; i++) {
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SQLGetDiagRec(SQL_HANDLE_STMT, stmt, i + 1, state, &nativeerror, diagnostic, sizeof(diagnostic), &diagbytes);
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ast_log(LOG_WARNING, "SQL Execute returned an error %d: %s: %s (%d)\n", res, state, diagnostic, diagbytes);
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if (i > 10) {
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ast_log(LOG_WARNING, "Oh, that was good. There are really %d diagnostics?\n", (int)numfields);
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break;
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}
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}
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}
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ast_log(LOG_WARNING, "SQL Execute error %d! Attempting a reconnect...\n", res);
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SQLFreeHandle(SQL_HANDLE_STMT, stmt);
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ast_mutex_lock(&obj->lock);
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obj->up = 0;
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ast_mutex_unlock(&obj->lock);
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odbc_obj_disconnect(obj);
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odbc_obj_connect(obj);
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continue;
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}
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break;
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}
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}
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return stmt;
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}
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int odbc_smart_execute(odbc_obj *obj, SQLHSTMT stmt)
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{
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int res = 0, i;
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SQLINTEGER nativeerror=0, numfields=0;
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SQLSMALLINT diagbytes=0;
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unsigned char state[10], diagnostic[256];
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res = SQLExecute(stmt);
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if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO) && (res != SQL_NO_DATA)) {
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if (res == SQL_ERROR) {
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SQLGetDiagField(SQL_HANDLE_STMT, stmt, 1, SQL_DIAG_NUMBER, &numfields, SQL_IS_INTEGER, &diagbytes);
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for (i=0; i< numfields + 1; i++) {
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SQLGetDiagRec(SQL_HANDLE_STMT, stmt, i + 1, state, &nativeerror, diagnostic, sizeof(diagnostic), &diagbytes);
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ast_log(LOG_WARNING, "SQL Execute returned an error %d: %s: %s (%d)\n", res, state, diagnostic, diagbytes);
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if (i > 10) {
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ast_log(LOG_WARNING, "Oh, that was good. There are really %d diagnostics?\n", (int)numfields);
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break;
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}
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}
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}
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/*
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ast_log(LOG_WARNING, "SQL Execute error %d! Attempting a reconnect...\n", res);
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ast_mutex_lock(&obj->lock);
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obj->up = 0;
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ast_mutex_unlock(&obj->lock);
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odbc_obj_disconnect(obj);
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odbc_obj_connect(obj);
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res = SQLExecute(stmt);
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*/
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}
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return res;
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}
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int odbc_smart_direct_execute(odbc_obj *obj, SQLHSTMT stmt, char *sql)
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{
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int res = 0;
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res = SQLExecDirect (stmt, (unsigned char *)sql, SQL_NTS);
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if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
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ast_log(LOG_WARNING, "SQL Execute error! Attempting a reconnect...\n");
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ast_mutex_lock(&obj->lock);
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obj->up = 0;
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ast_mutex_unlock(&obj->lock);
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odbc_obj_disconnect(obj);
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odbc_obj_connect(obj);
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res = SQLExecDirect (stmt, (unsigned char *)sql, SQL_NTS);
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}
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return res;
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}
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int odbc_sanity_check(odbc_obj *obj)
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{
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char *test_sql = "select 1";
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SQLHSTMT stmt;
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int res = 0;
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ast_mutex_lock(&obj->lock);
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if(obj->up) { /* so you say... let's make sure */
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res = SQLAllocHandle (SQL_HANDLE_STMT, obj->con, &stmt);
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if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
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obj->up = 0; /* Liar!*/
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} else {
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res = SQLPrepare(stmt, (unsigned char *)test_sql, SQL_NTS);
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if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
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obj->up = 0; /* Liar!*/
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} else {
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res = SQLExecute(stmt);
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if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
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obj->up = 0; /* Liar!*/
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}
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}
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}
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SQLFreeHandle (SQL_HANDLE_STMT, stmt);
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}
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ast_mutex_unlock(&obj->lock);
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if(!obj->up) { /* Try to reconnect! */
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ast_log(LOG_WARNING, "Connection is down attempting to reconnect...\n");
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odbc_obj_disconnect(obj);
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odbc_obj_connect(obj);
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}
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return obj->up;
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}
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static int load_odbc_config(void)
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{
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static char *cfg = "res_odbc.conf";
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struct ast_config *config;
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struct ast_variable *v;
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char *cat, *dsn, *username, *password;
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int enabled;
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int connect = 0;
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char *env_var;
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odbc_obj *obj;
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config = ast_config_load(cfg);
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if (config) {
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for (cat = ast_category_browse(config, NULL); cat; cat=ast_category_browse(config, cat)) {
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if (!strcmp(cat, "ENV")) {
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for (v = ast_variable_browse(config, cat); v; v = v->next) {
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env_var = malloc(strlen(v->name) + strlen(v->value) + 2);
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if (env_var) {
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sprintf(env_var, "%s=%s", v->name, v->value);
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ast_log(LOG_NOTICE, "Adding ENV var: %s=%s\n", v->name, v->value);
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putenv(env_var);
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free(env_var);
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}
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}
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cat = ast_category_browse(config, cat);
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}
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dsn = username = password = NULL;
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enabled = 1;
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connect = 0;
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for (v = ast_variable_browse(config, cat); v; v = v->next) {
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if (!strcmp(v->name, "enabled"))
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enabled = ast_true(v->value);
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if (!strcmp(v->name, "pre-connect"))
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connect = ast_true(v->value);
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if (!strcmp(v->name, "dsn"))
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dsn = v->value;
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if (!strcmp(v->name, "username"))
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username = v->value;
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if (!strcmp(v->name, "password"))
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password = v->value;
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}
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if (enabled && dsn) {
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obj = new_odbc_obj(cat, dsn, username, password);
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if (obj) {
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register_odbc_obj(cat, obj);
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ast_log(LOG_NOTICE, "registered database handle '%s' dsn->[%s]\n", cat, obj->dsn);
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if (connect) {
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odbc_obj_connect(obj);
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}
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} else {
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ast_log(LOG_WARNING, "Addition of obj %s failed.\n", cat);
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}
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}
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}
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ast_config_destroy(config);
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}
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return 0;
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}
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int odbc_dump_fd(int fd, odbc_obj *obj)
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{
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/* make sure the connection is up before we lie to our master.*/
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odbc_sanity_check(obj);
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ast_cli(fd, "Name: %s\nDSN: %s\nConnected: %s\n\n", obj->name, obj->dsn, obj->up ? "yes" : "no");
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return 0;
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}
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static int odbc_connect_usage(int fd)
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{
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ast_cli(fd, "usage odbc connect <DSN>\n");
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return 0;
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}
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static int odbc_disconnect_usage(int fd)
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{
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ast_cli(fd, "usage odbc disconnect <DSN>\n");
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return 0;
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}
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static int odbc_show_command(int fd, int argc, char **argv)
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{
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odbc_obj *obj;
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int x = 0;
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if (!strcmp(argv[1], "show")) {
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if (!argv[2] || (argv[2] && !strcmp(argv[2], "all"))) {
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for (x = 0; x < MAX_ODBC_HANDLES; x++) {
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if (!ODBC_REGISTRY[x].used)
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break;
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if (ODBC_REGISTRY[x].obj)
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odbc_dump_fd(fd, ODBC_REGISTRY[x].obj);
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}
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} else {
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obj = odbc_read(ODBC_REGISTRY, argv[2]);
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if (obj)
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odbc_dump_fd(fd, obj);
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}
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}
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return 0;
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}
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static int odbc_disconnect_command(int fd, int argc, char **argv)
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{
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odbc_obj *obj;
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if (!strcmp(argv[1], "disconnect")) {
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if (!argv[2])
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return odbc_disconnect_usage(fd);
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obj = odbc_read(ODBC_REGISTRY, argv[2]);
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if (obj) {
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odbc_obj_disconnect(obj);
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}
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}
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return 0;
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}
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static int odbc_connect_command(int fd, int argc, char **argv)
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{
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odbc_obj *obj;
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if (!argv[1])
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return odbc_connect_usage(fd);
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if (!strcmp(argv[1], "connect") || !strcmp(argv[1], "disconnect")) {
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if (!argv[2])
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return odbc_connect_usage(fd);
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obj = odbc_read(ODBC_REGISTRY, argv[2]);
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if (obj) {
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odbc_obj_connect(obj);
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}
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}
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return 0;
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}
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static char connect_usage[] =
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"Usage: odbc connect <DSN>\n"
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" Connect to ODBC DSN\n";
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static char disconnect_usage[] =
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"Usage: odbc connect <DSN>\n"
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" Disconnect from ODBC DSN\n";
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static char show_usage[] =
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"Usage: odbc show {DSN}\n"
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" Show ODBC {DSN}\n"
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" Specifying DSN will show that DSN else, all DSNs are shown\n";
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static struct ast_cli_entry odbc_connect_struct =
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{ { "odbc", "connect", NULL }, odbc_connect_command, "Connect to ODBC DSN", connect_usage };
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static struct ast_cli_entry odbc_disconnect_struct =
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{ { "odbc", "disconnect", NULL }, odbc_disconnect_command, "Disconnect from ODBC DSN", disconnect_usage };
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static struct ast_cli_entry odbc_show_struct =
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{ { "odbc", "show", NULL }, odbc_show_command, "Show ODBC DSN(s)", show_usage };
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/* api calls */
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int register_odbc_obj(char *name, odbc_obj *obj)
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{
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if (obj != NULL)
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return odbc_write(ODBC_REGISTRY, name, obj);
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return 0;
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}
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odbc_obj *fetch_odbc_obj(const char *name, int check)
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{
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odbc_obj *obj = NULL;
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if((obj = (odbc_obj *) odbc_read(ODBC_REGISTRY, name))) {
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if(check)
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odbc_sanity_check(obj);
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}
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return obj;
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}
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odbc_obj *new_odbc_obj(char *name, char *dsn, char *username, char *password)
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{
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static odbc_obj *new;
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new = malloc(sizeof(odbc_obj));
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if (!new)
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return NULL;
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memset(new, 0, sizeof(odbc_obj));
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new->env = SQL_NULL_HANDLE;
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new->name = malloc(strlen(name) + 1);
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if (new->name == NULL)
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return NULL;
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new->dsn = malloc(strlen(dsn) + 1);
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if (new->dsn == NULL)
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return NULL;
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if (username) {
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new->username = malloc(strlen(username) + 1);
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if (new->username == NULL)
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return NULL;
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strcpy(new->username, username);
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}
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if (password) {
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new->password = malloc(strlen(password) + 1);
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if (new->password == NULL)
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return NULL;
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strcpy(new->password, password);
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}
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strcpy(new->name, name);
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strcpy(new->dsn, dsn);
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new->up = 0;
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ast_mutex_init(&new->lock);
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return new;
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}
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void destroy_odbc_obj(odbc_obj **obj)
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{
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odbc_obj_disconnect(*obj);
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ast_mutex_lock(&(*obj)->lock);
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SQLFreeHandle(SQL_HANDLE_STMT, (*obj)->stmt);
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SQLFreeHandle(SQL_HANDLE_DBC, (*obj)->con);
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SQLFreeHandle(SQL_HANDLE_ENV, (*obj)->env);
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free((*obj)->name);
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free((*obj)->dsn);
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if ((*obj)->username)
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free((*obj)->username);
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if ((*obj)->password)
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free((*obj)->password);
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ast_mutex_unlock(&(*obj)->lock);
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ast_mutex_destroy(&(*obj)->lock);
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free(*obj);
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}
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odbc_status odbc_obj_disconnect(odbc_obj *obj)
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{
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int res;
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ast_mutex_lock(&obj->lock);
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res = SQLDisconnect(obj->con);
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if (res == ODBC_SUCCESS) {
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ast_log(LOG_WARNING, "res_odbc: disconnected %d from %s [%s]\n", res, obj->name, obj->dsn);
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} else {
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ast_log(LOG_WARNING, "res_odbc: %s [%s] already disconnected\n",
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obj->name, obj->dsn);
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}
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obj->up = 0;
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ast_mutex_unlock(&obj->lock);
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return ODBC_SUCCESS;
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}
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odbc_status odbc_obj_connect(odbc_obj *obj)
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{
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int res;
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SQLINTEGER err;
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short int mlen;
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unsigned char msg[200], stat[10];
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|
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ast_mutex_lock(&obj->lock);
|
|
|
|
if (obj->env == SQL_NULL_HANDLE) {
|
|
res = SQLAllocHandle(SQL_HANDLE_ENV, SQL_NULL_HANDLE, &obj->env);
|
|
|
|
if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
|
|
if (option_verbose > 3)
|
|
ast_log(LOG_WARNING, "res_odbc: Error AllocHandle\n");
|
|
ast_mutex_unlock(&obj->lock);
|
|
return ODBC_FAIL;
|
|
}
|
|
|
|
res = SQLSetEnvAttr(obj->env, SQL_ATTR_ODBC_VERSION, (void *) SQL_OV_ODBC3, 0);
|
|
|
|
if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
|
|
if (option_verbose > 3)
|
|
ast_log(LOG_WARNING, "res_odbc: Error SetEnv\n");
|
|
SQLFreeHandle(SQL_HANDLE_ENV, obj->env);
|
|
ast_mutex_unlock(&obj->lock);
|
|
return ODBC_FAIL;
|
|
}
|
|
|
|
res = SQLAllocHandle(SQL_HANDLE_DBC, obj->env, &obj->con);
|
|
|
|
if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
|
|
|
|
if (option_verbose > 3)
|
|
ast_log(LOG_WARNING, "res_odbc: Error AllocHDB %d\n", res);
|
|
SQLFreeHandle(SQL_HANDLE_ENV, obj->env);
|
|
|
|
ast_mutex_unlock(&obj->lock);
|
|
return ODBC_FAIL;
|
|
}
|
|
SQLSetConnectAttr(obj->con, SQL_LOGIN_TIMEOUT, (SQLPOINTER *) 10, 0);
|
|
}
|
|
if(obj->up) {
|
|
odbc_obj_disconnect(obj);
|
|
ast_log(LOG_NOTICE,"Re-connecting %s\n", obj->name);
|
|
}
|
|
|
|
ast_log(LOG_NOTICE, "Connecting %s\n", obj->name);
|
|
|
|
res = SQLConnect(obj->con,
|
|
(SQLCHAR *) obj->dsn, SQL_NTS,
|
|
(SQLCHAR *) obj->username, SQL_NTS,
|
|
(SQLCHAR *) obj->password, SQL_NTS);
|
|
|
|
if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
|
|
SQLGetDiagRec(SQL_HANDLE_DBC, obj->con, 1, stat, &err, msg, 100, &mlen);
|
|
SQLFreeHandle(SQL_HANDLE_ENV, obj->env);
|
|
ast_mutex_unlock(&obj->lock);
|
|
ast_log(LOG_WARNING, "res_odbc: Error SQLConnect=%d errno=%d %s\n", res, (int)err, msg);
|
|
return ODBC_FAIL;
|
|
} else {
|
|
|
|
ast_log(LOG_NOTICE, "res_odbc: Connected to %s [%s]\n", obj->name, obj->dsn);
|
|
obj->up = 1;
|
|
}
|
|
|
|
ast_mutex_unlock(&obj->lock);
|
|
return ODBC_SUCCESS;
|
|
}
|
|
|
|
STANDARD_LOCAL_USER;
|
|
|
|
LOCAL_USER_DECL;
|
|
|
|
int unload_module(void)
|
|
{
|
|
STANDARD_HANGUP_LOCALUSERS;
|
|
odbc_destroy();
|
|
ast_cli_unregister(&odbc_disconnect_struct);
|
|
ast_cli_unregister(&odbc_connect_struct);
|
|
ast_cli_unregister(&odbc_show_struct);
|
|
ast_log(LOG_NOTICE, "res_odbc unloaded.\n");
|
|
return 0;
|
|
}
|
|
|
|
int load_module(void)
|
|
{
|
|
odbc_init();
|
|
load_odbc_config();
|
|
ast_cli_register(&odbc_disconnect_struct);
|
|
ast_cli_register(&odbc_connect_struct);
|
|
ast_cli_register(&odbc_show_struct);
|
|
ast_log(LOG_NOTICE, "res_odbc loaded.\n");
|
|
return 0;
|
|
}
|
|
|
|
char *description(void)
|
|
{
|
|
return tdesc;
|
|
}
|
|
|
|
int usecount(void)
|
|
{
|
|
int res;
|
|
STANDARD_USECOUNT(res);
|
|
return res;
|
|
}
|
|
|
|
char *key()
|
|
{
|
|
return ASTERISK_GPL_KEY;
|
|
}
|