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asterisk/res/res_odbc.c

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/*
* Asterisk -- An open source telephony toolkit.
*
* Copyright (C) 1999 - 2008, Digium, Inc.
*
* Mark Spencer <markster@digium.com>
*
* res_odbc.c <ODBC resource manager>
* Copyright (C) 2004 - 2005 Anthony Minessale II <anthmct@yahoo.com>
*
* 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 ODBC resource manager
*
* \author Mark Spencer <markster@digium.com>
* \author Anthony Minessale II <anthmct@yahoo.com>
* \author Tilghman Lesher <tilghman@digium.com>
*
* \arg See also: \ref cdr_odbc
*/
/*** MODULEINFO
<depend>generic_odbc</depend>
<depend>ltdl</depend>
<support_level>core</support_level>
***/
#include "asterisk.h"
ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
#include "asterisk/file.h"
#include "asterisk/channel.h"
#include "asterisk/config.h"
#include "asterisk/pbx.h"
#include "asterisk/module.h"
#include "asterisk/cli.h"
#include "asterisk/lock.h"
#include "asterisk/res_odbc.h"
#include "asterisk/time.h"
#include "asterisk/astobj2.h"
#include "asterisk/app.h"
#include "asterisk/strings.h"
#include "asterisk/threadstorage.h"
#include "asterisk/data.h"
/*** DOCUMENTATION
<function name="ODBC" language="en_US">
<synopsis>
Controls ODBC transaction properties.
</synopsis>
<syntax>
<parameter name="property" required="true">
<enumlist>
<enum name="transaction">
<para>Gets or sets the active transaction ID. If set, and the transaction ID does not
exist and a <replaceable>database name</replaceable> is specified as an argument, it will be created.</para>
</enum>
<enum name="forcecommit">
<para>Controls whether a transaction will be automatically committed when the channel
hangs up. Defaults to false. If a <replaceable>transaction ID</replaceable> is specified in the optional argument,
the property will be applied to that ID, otherwise to the current active ID.</para>
</enum>
<enum name="isolation">
<para>Controls the data isolation on uncommitted transactions. May be one of the
following: <literal>read_committed</literal>, <literal>read_uncommitted</literal>,
<literal>repeatable_read</literal>, or <literal>serializable</literal>. Defaults to the
database setting in <filename>res_odbc.conf</filename> or <literal>read_committed</literal>
if not specified. If a <replaceable>transaction ID</replaceable> is specified as an optional argument, it will be
applied to that ID, otherwise the current active ID.</para>
</enum>
</enumlist>
</parameter>
<parameter name="argument" required="false" />
</syntax>
<description>
<para>The ODBC() function allows setting several properties to influence how a connected
database processes transactions.</para>
</description>
</function>
<application name="ODBC_Commit" language="en_US">
<synopsis>
Commits a currently open database transaction.
</synopsis>
<syntax>
<parameter name="transaction ID" required="no" />
</syntax>
<description>
<para>Commits the database transaction specified by <replaceable>transaction ID</replaceable>
or the current active transaction, if not specified.</para>
</description>
</application>
<application name="ODBC_Rollback" language="en_US">
<synopsis>
Rollback a currently open database transaction.
</synopsis>
<syntax>
<parameter name="transaction ID" required="no" />
</syntax>
<description>
<para>Rolls back the database transaction specified by <replaceable>transaction ID</replaceable>
or the current active transaction, if not specified.</para>
</description>
</application>
***/
struct odbc_class
{
AST_LIST_ENTRY(odbc_class) list;
char name[80];
char dsn[80];
char *username;
char *password;
char *sanitysql;
SQLHENV env;
unsigned int haspool:1; /*!< Boolean - TDS databases need this */
unsigned int delme:1; /*!< Purge the class */
unsigned int backslash_is_escape:1; /*!< On this database, the backslash is a native escape sequence */
unsigned int forcecommit:1; /*!< Should uncommitted transactions be auto-committed on handle release? */
unsigned int isolation; /*!< Flags for how the DB should deal with data in other, uncommitted transactions */
unsigned int limit; /*!< Maximum number of database handles we will allow */
int count; /*!< Running count of pooled connections */
unsigned int idlecheck; /*!< Recheck the connection if it is idle for this long (in seconds) */
unsigned int conntimeout; /*!< Maximum time the connection process should take */
/*! When a connection fails, cache that failure for how long? */
struct timeval negative_connection_cache;
/*! When a connection fails, when did that last occur? */
struct timeval last_negative_connect;
/*! List of handles associated with this class */
struct ao2_container *obj_container;
};
static struct ao2_container *class_container;
static AST_RWLIST_HEAD_STATIC(odbc_tables, odbc_cache_tables);
static odbc_status odbc_obj_connect(struct odbc_obj *obj);
static odbc_status odbc_obj_disconnect(struct odbc_obj *obj);
static int odbc_register_class(struct odbc_class *class, int connect);
static void odbc_txn_free(void *data);
static void odbc_release_obj2(struct odbc_obj *obj, struct odbc_txn_frame *tx);
AST_THREADSTORAGE(errors_buf);
static struct ast_datastore_info txn_info = {
.type = "ODBC_Transaction",
.destroy = odbc_txn_free,
};
struct odbc_txn_frame {
AST_LIST_ENTRY(odbc_txn_frame) list;
struct ast_channel *owner;
struct odbc_obj *obj; /*!< Database handle within which transacted statements are run */
/*!\brief Is this record the current active transaction within the channel?
* Note that the active flag is really only necessary for statements which
* are triggered from the dialplan, as there isn't a direct correlation
* between multiple statements. Applications wishing to use transactions
* may simply perform each statement on the same odbc_obj, which keeps the
* transaction persistent.
*/
unsigned int active:1;
unsigned int forcecommit:1; /*!< Should uncommitted transactions be auto-committed on handle release? */
unsigned int isolation; /*!< Flags for how the DB should deal with data in other, uncommitted transactions */
char name[0]; /*!< Name of this transaction ID */
};
#define DATA_EXPORT_ODBC_CLASS(MEMBER) \
MEMBER(odbc_class, name, AST_DATA_STRING) \
MEMBER(odbc_class, dsn, AST_DATA_STRING) \
MEMBER(odbc_class, username, AST_DATA_STRING) \
MEMBER(odbc_class, password, AST_DATA_PASSWORD) \
MEMBER(odbc_class, limit, AST_DATA_INTEGER) \
MEMBER(odbc_class, count, AST_DATA_INTEGER) \
MEMBER(odbc_class, forcecommit, AST_DATA_BOOLEAN)
AST_DATA_STRUCTURE(odbc_class, DATA_EXPORT_ODBC_CLASS);
static const char *isolation2text(int iso)
{
if (iso == SQL_TXN_READ_COMMITTED) {
return "read_committed";
} else if (iso == SQL_TXN_READ_UNCOMMITTED) {
return "read_uncommitted";
} else if (iso == SQL_TXN_SERIALIZABLE) {
return "serializable";
} else if (iso == SQL_TXN_REPEATABLE_READ) {
return "repeatable_read";
} else {
return "unknown";
}
}
static int text2isolation(const char *txt)
{
if (strncasecmp(txt, "read_", 5) == 0) {
if (strncasecmp(txt + 5, "c", 1) == 0) {
return SQL_TXN_READ_COMMITTED;
} else if (strncasecmp(txt + 5, "u", 1) == 0) {
return SQL_TXN_READ_UNCOMMITTED;
} else {
return 0;
}
} else if (strncasecmp(txt, "ser", 3) == 0) {
return SQL_TXN_SERIALIZABLE;
} else if (strncasecmp(txt, "rep", 3) == 0) {
return SQL_TXN_REPEATABLE_READ;
} else {
return 0;
}
}
static struct odbc_txn_frame *find_transaction(struct ast_channel *chan, struct odbc_obj *obj, const char *name, int active)
{
struct ast_datastore *txn_store;
AST_LIST_HEAD(, odbc_txn_frame) *oldlist;
struct odbc_txn_frame *txn = NULL;
if (!chan && obj && obj->txf && obj->txf->owner) {
chan = obj->txf->owner;
} else if (!chan) {
/* No channel == no transaction */
return NULL;
}
ast_channel_lock(chan);
if ((txn_store = ast_channel_datastore_find(chan, &txn_info, NULL))) {
oldlist = txn_store->data;
} else {
/* Need to create a new datastore */
if (!(txn_store = ast_datastore_alloc(&txn_info, NULL))) {
ast_log(LOG_ERROR, "Unable to allocate a new datastore. Cannot create a new transaction.\n");
ast_channel_unlock(chan);
return NULL;
}
if (!(oldlist = ast_calloc(1, sizeof(*oldlist)))) {
ast_log(LOG_ERROR, "Unable to allocate datastore list head. Cannot create a new transaction.\n");
ast_datastore_free(txn_store);
ast_channel_unlock(chan);
return NULL;
}
txn_store->data = oldlist;
AST_LIST_HEAD_INIT(oldlist);
ast_channel_datastore_add(chan, txn_store);
}
AST_LIST_LOCK(oldlist);
ast_channel_unlock(chan);
/* Scanning for an object is *fast*. Scanning for a name is much slower. */
if (obj != NULL || active == 1) {
AST_LIST_TRAVERSE(oldlist, txn, list) {
if (txn->obj == obj || txn->active) {
AST_LIST_UNLOCK(oldlist);
return txn;
}
}
}
if (name != NULL) {
AST_LIST_TRAVERSE(oldlist, txn, list) {
if (!strcasecmp(txn->name, name)) {
AST_LIST_UNLOCK(oldlist);
return txn;
}
}
}
/* Nothing found, create one */
if (name && obj && (txn = ast_calloc(1, sizeof(*txn) + strlen(name) + 1))) {
struct odbc_txn_frame *otxn;
strcpy(txn->name, name); /* SAFE */
txn->obj = obj;
txn->isolation = obj->parent->isolation;
txn->forcecommit = obj->parent->forcecommit;
txn->owner = chan;
txn->active = 1;
/* On creation, the txn becomes active, and all others inactive */
AST_LIST_TRAVERSE(oldlist, otxn, list) {
otxn->active = 0;
}
AST_LIST_INSERT_TAIL(oldlist, txn, list);
obj->txf = txn;
obj->tx = 1;
}
AST_LIST_UNLOCK(oldlist);
return txn;
}
static struct odbc_txn_frame *release_transaction(struct odbc_txn_frame *tx)
{
if (!tx) {
return NULL;
}
ast_debug(2, "release_transaction(%p) called (tx->obj = %p, tx->obj->txf = %p)\n", tx, tx->obj, tx->obj ? tx->obj->txf : NULL);
/* If we have an owner, disassociate */
if (tx->owner) {
struct ast_datastore *txn_store;
AST_LIST_HEAD(, odbc_txn_frame) *oldlist;
ast_channel_lock(tx->owner);
if ((txn_store = ast_channel_datastore_find(tx->owner, &txn_info, NULL))) {
oldlist = txn_store->data;
AST_LIST_LOCK(oldlist);
AST_LIST_REMOVE(oldlist, tx, list);
AST_LIST_UNLOCK(oldlist);
}
ast_channel_unlock(tx->owner);
tx->owner = NULL;
}
if (tx->obj) {
/* If we have any uncommitted transactions, they are handled when we release the object */
struct odbc_obj *obj = tx->obj;
/* Prevent recursion during destruction */
tx->obj->txf = NULL;
tx->obj = NULL;
odbc_release_obj2(obj, tx);
}
ast_free(tx);
return NULL;
}
static void odbc_txn_free(void *vdata)
{
struct odbc_txn_frame *tx;
AST_LIST_HEAD(, odbc_txn_frame) *oldlist = vdata;
ast_debug(2, "odbc_txn_free(%p) called\n", vdata);
AST_LIST_LOCK(oldlist);
while ((tx = AST_LIST_REMOVE_HEAD(oldlist, list))) {
release_transaction(tx);
}
AST_LIST_UNLOCK(oldlist);
AST_LIST_HEAD_DESTROY(oldlist);
ast_free(oldlist);
}
static int mark_transaction_active(struct ast_channel *chan, struct odbc_txn_frame *tx)
{
struct ast_datastore *txn_store;
AST_LIST_HEAD(, odbc_txn_frame) *oldlist;
struct odbc_txn_frame *active = NULL, *txn;
if (!chan && tx && tx->owner) {
chan = tx->owner;
}
ast_channel_lock(chan);
if (!(txn_store = ast_channel_datastore_find(chan, &txn_info, NULL))) {
ast_channel_unlock(chan);
return -1;
}
oldlist = txn_store->data;
AST_LIST_LOCK(oldlist);
AST_LIST_TRAVERSE(oldlist, txn, list) {
if (txn == tx) {
txn->active = 1;
active = txn;
} else {
txn->active = 0;
}
}
AST_LIST_UNLOCK(oldlist);
ast_channel_unlock(chan);
return active ? 0 : -1;
}
static void odbc_class_destructor(void *data)
{
struct odbc_class *class = data;
/* Due to refcounts, we can safely assume that any objects with a reference
* to us will prevent our destruction, so we don't need to worry about them.
*/
if (class->username) {
ast_free(class->username);
}
if (class->password) {
ast_free(class->password);
}
if (class->sanitysql) {
ast_free(class->sanitysql);
}
ao2_ref(class->obj_container, -1);
SQLFreeHandle(SQL_HANDLE_ENV, class->env);
}
static int null_hash_fn(const void *obj, const int flags)
{
return 0;
}
static void odbc_obj_destructor(void *data)
{
struct odbc_obj *obj = data;
struct odbc_class *class = obj->parent;
obj->parent = NULL;
odbc_obj_disconnect(obj);
ast_mutex_destroy(&obj->lock);
ao2_ref(class, -1);
}
static void destroy_table_cache(struct odbc_cache_tables *table) {
struct odbc_cache_columns *col;
ast_debug(1, "Destroying table cache for %s\n", table->table);
AST_RWLIST_WRLOCK(&table->columns);
while ((col = AST_RWLIST_REMOVE_HEAD(&table->columns, list))) {
ast_free(col);
}
AST_RWLIST_UNLOCK(&table->columns);
AST_RWLIST_HEAD_DESTROY(&table->columns);
ast_free(table);
}
/*!
* \brief Find or create an entry describing the table specified.
* \param database Name of an ODBC class on which to query the table
* \param tablename Tablename to describe
* \retval A structure describing the table layout, or NULL, if the table is not found or another error occurs.
* When a structure is returned, the contained columns list will be
* rdlock'ed, to ensure that it will be retained in memory.
* \since 1.6.1
*/
struct odbc_cache_tables *ast_odbc_find_table(const char *database, const char *tablename)
{
struct odbc_cache_tables *tableptr;
struct odbc_cache_columns *entry;
char columnname[80];
SQLLEN sqlptr;
SQLHSTMT stmt = NULL;
int res = 0, error = 0, try = 0;
struct odbc_obj *obj = ast_odbc_request_obj(database, 0);
AST_RWLIST_RDLOCK(&odbc_tables);
AST_RWLIST_TRAVERSE(&odbc_tables, tableptr, list) {
if (strcmp(tableptr->connection, database) == 0 && strcmp(tableptr->table, tablename) == 0) {
break;
}
}
if (tableptr) {
AST_RWLIST_RDLOCK(&tableptr->columns);
AST_RWLIST_UNLOCK(&odbc_tables);
if (obj) {
ast_odbc_release_obj(obj);
}
return tableptr;
}
if (!obj) {
ast_log(LOG_WARNING, "Unable to retrieve database handle for table description '%s@%s'\n", tablename, database);
AST_RWLIST_UNLOCK(&odbc_tables);
return NULL;
}
/* Table structure not already cached; build it now. */
do {
res = SQLAllocHandle(SQL_HANDLE_STMT, obj->con, &stmt);
if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
if (try == 0) {
try = 1;
ast_odbc_sanity_check(obj);
continue;
}
ast_log(LOG_WARNING, "SQL Alloc Handle failed on connection '%s'!\n", database);
break;
}
res = SQLColumns(stmt, NULL, 0, NULL, 0, (unsigned char *)tablename, SQL_NTS, (unsigned char *)"%", SQL_NTS);
if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
if (try == 0) {
try = 1;
SQLFreeHandle(SQL_HANDLE_STMT, stmt);
ast_odbc_sanity_check(obj);
continue;
}
ast_log(LOG_ERROR, "Unable to query database columns on connection '%s'.\n", database);
break;
}
if (!(tableptr = ast_calloc(sizeof(char), sizeof(*tableptr) + strlen(database) + 1 + strlen(tablename) + 1))) {
ast_log(LOG_ERROR, "Out of memory creating entry for table '%s' on connection '%s'\n", tablename, database);
break;
}
tableptr->connection = (char *)tableptr + sizeof(*tableptr);
tableptr->table = (char *)tableptr + sizeof(*tableptr) + strlen(database) + 1;
strcpy(tableptr->connection, database); /* SAFE */
strcpy(tableptr->table, tablename); /* SAFE */
AST_RWLIST_HEAD_INIT(&(tableptr->columns));
while ((res = SQLFetch(stmt)) != SQL_NO_DATA && res != SQL_ERROR) {
SQLGetData(stmt, 4, SQL_C_CHAR, columnname, sizeof(columnname), &sqlptr);
if (!(entry = ast_calloc(sizeof(char), sizeof(*entry) + strlen(columnname) + 1))) {
ast_log(LOG_ERROR, "Out of memory creating entry for column '%s' in table '%s' on connection '%s'\n", columnname, tablename, database);
error = 1;
break;
}
entry->name = (char *)entry + sizeof(*entry);
strcpy(entry->name, columnname);
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(10, "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);
}
SQLFreeHandle(SQL_HANDLE_STMT, stmt);
AST_RWLIST_INSERT_TAIL(&odbc_tables, tableptr, list);
AST_RWLIST_RDLOCK(&(tableptr->columns));
break;
} while (1);
AST_RWLIST_UNLOCK(&odbc_tables);
if (error) {
destroy_table_cache(tableptr);
tableptr = NULL;
}
if (obj) {
ast_odbc_release_obj(obj);
}
return tableptr;
}
struct odbc_cache_columns *ast_odbc_find_column(struct odbc_cache_tables *table, const char *colname)
{
struct odbc_cache_columns *col;
AST_RWLIST_TRAVERSE(&table->columns, col, list) {
if (strcasecmp(col->name, colname) == 0) {
return col;
}
}
return NULL;
}
int ast_odbc_clear_cache(const char *database, const char *tablename)
{
struct odbc_cache_tables *tableptr;
AST_RWLIST_WRLOCK(&odbc_tables);
AST_RWLIST_TRAVERSE_SAFE_BEGIN(&odbc_tables, tableptr, list) {
if (strcmp(tableptr->connection, database) == 0 && strcmp(tableptr->table, tablename) == 0) {
AST_LIST_REMOVE_CURRENT(list);
destroy_table_cache(tableptr);
break;
}
}
AST_RWLIST_TRAVERSE_SAFE_END
AST_RWLIST_UNLOCK(&odbc_tables);
return tableptr ? 0 : -1;
}
SQLHSTMT ast_odbc_direct_execute(struct odbc_obj *obj, SQLHSTMT (*exec_cb)(struct odbc_obj *obj, void *data), void *data)
{
int attempt;
SQLHSTMT stmt;
for (attempt = 0; attempt < 2; attempt++) {
stmt = exec_cb(obj, data);
if (stmt) {
break;
} else if (obj->tx) {
ast_log(LOG_WARNING, "Failed to execute, but unable to reconnect, as we're transactional.\n");
break;
} else if (attempt == 0) {
ast_log(LOG_WARNING, "SQL Execute error! Verifying connection to %s [%s]...\n", obj->parent->name, obj->parent->dsn);
}
if (!ast_odbc_sanity_check(obj)) {
break;
}
}
return stmt;
}
SQLHSTMT ast_odbc_prepare_and_execute(struct odbc_obj *obj, SQLHSTMT (*prepare_cb)(struct odbc_obj *obj, void *data), void *data)
{
int res = 0, i, attempt;
SQLINTEGER nativeerror=0, numfields=0;
SQLSMALLINT diagbytes=0;
unsigned char state[10], diagnostic[256];
SQLHSTMT stmt;
for (attempt = 0; attempt < 2; attempt++) {
/* This prepare callback may do more than just prepare -- it may also
* bind parameters, bind results, etc. The real key, here, is that
* when we disconnect, all handles become invalid for most databases.
* We must therefore redo everything when we establish a new
* connection. */
stmt = prepare_cb(obj, data);
if (stmt) {
res = SQLExecute(stmt);
if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO) && (res != SQL_NO_DATA)) {
if (res == SQL_ERROR) {
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;
}
}
}
if (obj->tx) {
ast_log(LOG_WARNING, "SQL Execute error, but unable to reconnect, as we're transactional.\n");
break;
} else {
ast_log(LOG_WARNING, "SQL Execute error %d! Verifying connection to %s [%s]...\n", res, obj->parent->name, obj->parent->dsn);
SQLFreeHandle(SQL_HANDLE_STMT, stmt);
stmt = NULL;
obj->up = 0;
/*
* While this isn't the best way to try to correct an error, this won't automatically
* fail when the statement handle invalidates.
*/
if (!ast_odbc_sanity_check(obj)) {
break;
}
continue;
}
} else {
obj->last_used = ast_tvnow();
}
break;
} else if (attempt == 0) {
ast_odbc_sanity_check(obj);
}
}
return stmt;
}
int ast_odbc_smart_execute(struct odbc_obj *obj, SQLHSTMT stmt)
{
int res = 0, i;
SQLINTEGER nativeerror=0, numfields=0;
SQLSMALLINT diagbytes=0;
unsigned char state[10], diagnostic[256];
res = SQLExecute(stmt);
if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO) && (res != SQL_NO_DATA)) {
if (res == SQL_ERROR) {
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;
}
}
}
} else {
obj->last_used = ast_tvnow();
}
return res;
}
SQLRETURN ast_odbc_ast_str_SQLGetData(struct ast_str **buf, int pmaxlen, SQLHSTMT StatementHandle, SQLUSMALLINT ColumnNumber, SQLSMALLINT TargetType, SQLLEN *StrLen_or_Ind)
{
SQLRETURN res;
if (pmaxlen == 0) {
if (SQLGetData(StatementHandle, ColumnNumber, TargetType, ast_str_buffer(*buf), 0, StrLen_or_Ind) == SQL_SUCCESS_WITH_INFO) {
ast_str_make_space(buf, *StrLen_or_Ind + 1);
}
} else if (pmaxlen > 0) {
ast_str_make_space(buf, pmaxlen);
}
res = SQLGetData(StatementHandle, ColumnNumber, TargetType, ast_str_buffer(*buf), ast_str_size(*buf), StrLen_or_Ind);
ast_str_update(*buf);
return res;
}
int ast_odbc_sanity_check(struct odbc_obj *obj)
{
char *test_sql = "select 1";
SQLHSTMT stmt;
int res = 0;
if (!ast_strlen_zero(obj->parent->sanitysql))
test_sql = obj->parent->sanitysql;
if (obj->up) {
res = SQLAllocHandle(SQL_HANDLE_STMT, obj->con, &stmt);
if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
obj->up = 0;
} else {
res = SQLPrepare(stmt, (unsigned char *)test_sql, SQL_NTS);
if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
obj->up = 0;
} else {
res = SQLExecute(stmt);
if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
obj->up = 0;
}
}
}
SQLFreeHandle (SQL_HANDLE_STMT, stmt);
}
if (!obj->up && !obj->tx) { /* Try to reconnect! */
ast_log(LOG_WARNING, "Connection is down attempting to reconnect...\n");
odbc_obj_disconnect(obj);
odbc_obj_connect(obj);
}
return obj->up;
}
static int load_odbc_config(void)
{
static char *cfg = "res_odbc.conf";
struct ast_config *config;
struct ast_variable *v;
char *cat;
const char *dsn, *username, *password, *sanitysql;
int enabled, pooling, limit, bse, conntimeout, forcecommit, isolation;
struct timeval ncache = { 0, 0 };
unsigned int idlecheck;
int preconnect = 0, res = 0;
struct ast_flags config_flags = { 0 };
struct odbc_class *new;
config = ast_config_load(cfg, config_flags);
if (config == CONFIG_STATUS_FILEMISSING || config == CONFIG_STATUS_FILEINVALID) {
ast_log(LOG_WARNING, "Unable to load config file res_odbc.conf\n");
return -1;
}
for (cat = ast_category_browse(config, NULL); cat; cat=ast_category_browse(config, cat)) {
if (!strcasecmp(cat, "ENV")) {
for (v = ast_variable_browse(config, cat); v; v = v->next) {
setenv(v->name, v->value, 1);
ast_log(LOG_NOTICE, "Adding ENV var: %s=%s\n", v->name, v->value);
}
} else {
/* Reset all to defaults for each class of odbc connections */
dsn = username = password = sanitysql = NULL;
enabled = 1;
preconnect = idlecheck = 0;
pooling = 0;
limit = 0;
bse = 1;
conntimeout = 10;
forcecommit = 0;
isolation = SQL_TXN_READ_COMMITTED;
for (v = ast_variable_browse(config, cat); v; v = v->next) {
if (!strcasecmp(v->name, "pooling")) {
if (ast_true(v->value))
pooling = 1;
} else if (!strncasecmp(v->name, "share", 5)) {
/* "shareconnections" is a little clearer in meaning than "pooling" */
if (ast_false(v->value))
pooling = 1;
} else if (!strcasecmp(v->name, "limit")) {
sscanf(v->value, "%30d", &limit);
if (ast_true(v->value) && !limit) {
ast_log(LOG_WARNING, "Limit should be a number, not a boolean: '%s'. Setting limit to 1023 for ODBC class '%s'.\n", v->value, cat);
limit = 1023;
} else if (ast_false(v->value)) {
ast_log(LOG_WARNING, "Limit should be a number, not a boolean: '%s'. Disabling ODBC class '%s'.\n", v->value, cat);
enabled = 0;
break;
}
} else if (!strcasecmp(v->name, "idlecheck")) {
sscanf(v->value, "%30u", &idlecheck);
} else if (!strcasecmp(v->name, "enabled")) {
enabled = ast_true(v->value);
} else if (!strcasecmp(v->name, "pre-connect")) {
preconnect = ast_true(v->value);
} else if (!strcasecmp(v->name, "dsn")) {
dsn = v->value;
} else if (!strcasecmp(v->name, "username")) {
username = v->value;
} else if (!strcasecmp(v->name, "password")) {
password = v->value;
} else if (!strcasecmp(v->name, "sanitysql")) {
sanitysql = v->value;
} else if (!strcasecmp(v->name, "backslash_is_escape")) {
bse = ast_true(v->value);
} else if (!strcasecmp(v->name, "connect_timeout")) {
if (sscanf(v->value, "%d", &conntimeout) != 1 || conntimeout < 1) {
ast_log(LOG_WARNING, "connect_timeout must be a positive integer\n");
conntimeout = 10;
}
} else if (!strcasecmp(v->name, "negative_connection_cache")) {
double dncache;
if (sscanf(v->value, "%lf", &dncache) != 1 || dncache < 0) {
ast_log(LOG_WARNING, "negative_connection_cache must be a non-negative integer\n");
/* 5 minutes sounds like a reasonable default */
ncache.tv_sec = 300;
ncache.tv_usec = 0;
} else {
ncache.tv_sec = (int)dncache;
ncache.tv_usec = (dncache - ncache.tv_sec) * 1000000;
}
} else if (!strcasecmp(v->name, "forcecommit")) {
forcecommit = ast_true(v->value);
} else if (!strcasecmp(v->name, "isolation")) {
if ((isolation = text2isolation(v->value)) == 0) {
ast_log(LOG_ERROR, "Unrecognized value for 'isolation': '%s' in section '%s'\n", v->value, cat);
isolation = SQL_TXN_READ_COMMITTED;
}
}
}
if (enabled && !ast_strlen_zero(dsn)) {
new = ao2_alloc(sizeof(*new), odbc_class_destructor);
if (!new) {
res = -1;
break;
}
SQLAllocHandle(SQL_HANDLE_ENV, SQL_NULL_HANDLE, &new->env);
res = SQLSetEnvAttr(new->env, SQL_ATTR_ODBC_VERSION, (void *) SQL_OV_ODBC3, 0);
if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
ast_log(LOG_WARNING, "res_odbc: Error SetEnv\n");
ao2_ref(new, -1);
return res;
}
new->obj_container = ao2_container_alloc(1, null_hash_fn, ao2_match_by_addr);
if (pooling) {
new->haspool = pooling;
if (limit) {
new->limit = limit;
} else {
ast_log(LOG_WARNING, "Pooling without also setting a limit is pointless. Changing limit from 0 to 5.\n");
new->limit = 5;
}
}
new->backslash_is_escape = bse ? 1 : 0;
new->forcecommit = forcecommit ? 1 : 0;
new->isolation = isolation;
new->idlecheck = idlecheck;
new->conntimeout = conntimeout;
new->negative_connection_cache = ncache;
if (cat)
ast_copy_string(new->name, cat, sizeof(new->name));
if (dsn)
ast_copy_string(new->dsn, dsn, sizeof(new->dsn));
if (username && !(new->username = ast_strdup(username))) {
ao2_ref(new, -1);
break;
}
if (password && !(new->password = ast_strdup(password))) {
ao2_ref(new, -1);
break;
}
if (sanitysql && !(new->sanitysql = ast_strdup(sanitysql))) {
ao2_ref(new, -1);
break;
}
odbc_register_class(new, preconnect);
ast_log(LOG_NOTICE, "Registered ODBC class '%s' dsn->[%s]\n", cat, dsn);
ao2_ref(new, -1);
new = NULL;
}
}
}
ast_config_destroy(config);
return res;
}
static char *handle_cli_odbc_show(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
struct ao2_iterator aoi = ao2_iterator_init(class_container, 0);
struct odbc_class *class;
struct odbc_obj *current;
int length = 0;
int which = 0;
char *ret = NULL;
switch (cmd) {
case CLI_INIT:
e->command = "odbc show";
e->usage =
"Usage: odbc show [class]\n"
" List settings of a particular ODBC class or,\n"
" if not specified, all classes.\n";
return NULL;
case CLI_GENERATE:
if (a->pos != 2)
return NULL;
length = strlen(a->word);
while ((class = ao2_iterator_next(&aoi))) {
if (!strncasecmp(a->word, class->name, length) && ++which > a->n) {
ret = ast_strdup(class->name);
}
ao2_ref(class, -1);
if (ret) {
break;
}
}
ao2_iterator_destroy(&aoi);
if (!ret && !strncasecmp(a->word, "all", length) && ++which > a->n) {
ret = ast_strdup("all");
}
return ret;
}
ast_cli(a->fd, "\nODBC DSN Settings\n");
ast_cli(a->fd, "-----------------\n\n");
aoi = ao2_iterator_init(class_container, 0);
while ((class = ao2_iterator_next(&aoi))) {
if ((a->argc == 2) || (a->argc == 3 && !strcmp(a->argv[2], "all")) || (!strcmp(a->argv[2], class->name))) {
int count = 0;
char timestr[80];
struct ast_tm tm;
ast_localtime(&class->last_negative_connect, &tm, NULL);
ast_strftime(timestr, sizeof(timestr), "%Y-%m-%d %T", &tm);
ast_cli(a->fd, " Name: %s\n DSN: %s\n", class->name, class->dsn);
ast_cli(a->fd, " Last connection attempt: %s\n", timestr);
if (class->haspool) {
struct ao2_iterator aoi2 = ao2_iterator_init(class->obj_container, 0);
ast_cli(a->fd, " Pooled: Yes\n Limit: %d\n Connections in use: %d\n", class->limit, class->count);
while ((current = ao2_iterator_next(&aoi2))) {
ast_mutex_lock(&current->lock);
#ifdef DEBUG_THREADS
ast_cli(a->fd, " - Connection %d: %s (%s:%d %s)\n", ++count,
current->used ? "in use" :
current->up && ast_odbc_sanity_check(current) ? "connected" : "disconnected",
current->file, current->lineno, current->function);
#else
ast_cli(a->fd, " - Connection %d: %s\n", ++count,
current->used ? "in use" :
current->up && ast_odbc_sanity_check(current) ? "connected" : "disconnected");
#endif
ast_mutex_unlock(&current->lock);
ao2_ref(current, -1);
}
ao2_iterator_destroy(&aoi2);
} else {
/* Should only ever be one of these (unless there are transactions) */
struct ao2_iterator aoi2 = ao2_iterator_init(class->obj_container, 0);
while ((current = ao2_iterator_next(&aoi2))) {
ast_cli(a->fd, " Pooled: No\n Connected: %s\n", current->used ? "In use" :
current->up && ast_odbc_sanity_check(current) ? "Yes" : "No");
ao2_ref(current, -1);
}
ao2_iterator_destroy(&aoi2);
}
ast_cli(a->fd, "\n");
}
ao2_ref(class, -1);
}
ao2_iterator_destroy(&aoi);
return CLI_SUCCESS;
}
static struct ast_cli_entry cli_odbc[] = {
AST_CLI_DEFINE(handle_cli_odbc_show, "List ODBC DSN(s)")
};
static int odbc_register_class(struct odbc_class *class, int preconnect)
{
struct odbc_obj *obj;
if (class) {
ao2_link(class_container, class);
/* I still have a reference in the caller, so a deref is NOT missing here. */
if (preconnect) {
/* Request and release builds a connection */
obj = ast_odbc_request_obj(class->name, 0);
if (obj) {
ast_odbc_release_obj(obj);
}
}
return 0;
} else {
ast_log(LOG_WARNING, "Attempted to register a NULL class?\n");
return -1;
}
}
static void odbc_release_obj2(struct odbc_obj *obj, struct odbc_txn_frame *tx)
{
SQLINTEGER nativeerror=0, numfields=0;
SQLSMALLINT diagbytes=0, i;
unsigned char state[10], diagnostic[256];
ast_debug(2, "odbc_release_obj2(%p) called (obj->txf = %p)\n", obj, obj->txf);
if (tx) {
ast_debug(1, "called on a transactional handle with %s\n", tx->forcecommit ? "COMMIT" : "ROLLBACK");
if (SQLEndTran(SQL_HANDLE_DBC, obj->con, tx->forcecommit ? SQL_COMMIT : SQL_ROLLBACK) == SQL_ERROR) {
/* Handle possible transaction commit failure */
SQLGetDiagField(SQL_HANDLE_DBC, obj->con, 1, SQL_DIAG_NUMBER, &numfields, SQL_IS_INTEGER, &diagbytes);
for (i = 0; i < numfields; i++) {
SQLGetDiagRec(SQL_HANDLE_DBC, obj->con, i + 1, state, &nativeerror, diagnostic, sizeof(diagnostic), &diagbytes);
ast_log(LOG_WARNING, "SQLEndTran returned an error: %s: %s\n", state, diagnostic);
if (!strcmp((char *)state, "25S02") || !strcmp((char *)state, "08007")) {
/* These codes mean that a commit failed and a transaction
* is still active. We must rollback, or things will get
* very, very weird for anybody using the handle next. */
SQLEndTran(SQL_HANDLE_DBC, obj->con, SQL_ROLLBACK);
}
if (i > 10) {
ast_log(LOG_WARNING, "Oh, that was good. There are really %d diagnostics?\n", (int)numfields);
break;
}
}
}
/* Transaction is done, reset autocommit */
if (SQLSetConnectAttr(obj->con, SQL_ATTR_AUTOCOMMIT, (void *)SQL_AUTOCOMMIT_ON, 0) == SQL_ERROR) {
SQLGetDiagField(SQL_HANDLE_DBC, obj->con, 1, SQL_DIAG_NUMBER, &numfields, SQL_IS_INTEGER, &diagbytes);
for (i = 0; i < numfields; i++) {
SQLGetDiagRec(SQL_HANDLE_DBC, obj->con, i + 1, state, &nativeerror, diagnostic, sizeof(diagnostic), &diagbytes);
ast_log(LOG_WARNING, "SetConnectAttr (Autocommit) returned an error: %s: %s\n", state, diagnostic);
if (i > 10) {
ast_log(LOG_WARNING, "Oh, that was good. There are really %d diagnostics?\n", (int)numfields);
break;
}
}
}
}
#ifdef DEBUG_THREADS
obj->file[0] = '\0';
obj->function[0] = '\0';
obj->lineno = 0;
#endif
/* For pooled connections, this frees the connection to be
* reused. For non-pooled connections, it does nothing. */
obj->used = 0;
if (obj->txf) {
/* Prevent recursion -- transaction is already closed out. */
obj->txf->obj = NULL;
obj->txf = release_transaction(obj->txf);
}
ao2_ref(obj, -1);
}
void ast_odbc_release_obj(struct odbc_obj *obj)
{
struct odbc_txn_frame *tx = find_transaction(NULL, obj, NULL, 0);
odbc_release_obj2(obj, tx);
}
int ast_odbc_backslash_is_escape(struct odbc_obj *obj)
{
return obj->parent->backslash_is_escape;
}
static int commit_exec(struct ast_channel *chan, const char *data)
{
struct odbc_txn_frame *tx;
SQLINTEGER nativeerror=0, numfields=0;
SQLSMALLINT diagbytes=0, i;
unsigned char state[10], diagnostic[256];
if (ast_strlen_zero(data)) {
tx = find_transaction(chan, NULL, NULL, 1);
} else {
tx = find_transaction(chan, NULL, data, 0);
}
pbx_builtin_setvar_helper(chan, "COMMIT_RESULT", "OK");
if (tx) {
if (SQLEndTran(SQL_HANDLE_DBC, tx->obj->con, SQL_COMMIT) == SQL_ERROR) {
struct ast_str *errors = ast_str_thread_get(&errors_buf, 16);
ast_str_reset(errors);
/* Handle possible transaction commit failure */
SQLGetDiagField(SQL_HANDLE_DBC, tx->obj->con, 1, SQL_DIAG_NUMBER, &numfields, SQL_IS_INTEGER, &diagbytes);
for (i = 0; i < numfields; i++) {
SQLGetDiagRec(SQL_HANDLE_DBC, tx->obj->con, i + 1, state, &nativeerror, diagnostic, sizeof(diagnostic), &diagbytes);
ast_str_append(&errors, 0, "%s%s", ast_str_strlen(errors) ? "," : "", state);
ast_log(LOG_WARNING, "SQLEndTran returned an error: %s: %s\n", state, diagnostic);
if (i > 10) {
ast_log(LOG_WARNING, "Oh, that was good. There are really %d diagnostics?\n", (int)numfields);
break;
}
}
pbx_builtin_setvar_helper(chan, "COMMIT_RESULT", ast_str_buffer(errors));
}
}
return 0;
}
static int rollback_exec(struct ast_channel *chan, const char *data)
{
struct odbc_txn_frame *tx;
SQLINTEGER nativeerror=0, numfields=0;
SQLSMALLINT diagbytes=0, i;
unsigned char state[10], diagnostic[256];
if (ast_strlen_zero(data)) {
tx = find_transaction(chan, NULL, NULL, 1);
} else {
tx = find_transaction(chan, NULL, data, 0);
}
pbx_builtin_setvar_helper(chan, "ROLLBACK_RESULT", "OK");
if (tx) {
if (SQLEndTran(SQL_HANDLE_DBC, tx->obj->con, SQL_ROLLBACK) == SQL_ERROR) {
struct ast_str *errors = ast_str_thread_get(&errors_buf, 16);
ast_str_reset(errors);
/* Handle possible transaction commit failure */
SQLGetDiagField(SQL_HANDLE_DBC, tx->obj->con, 1, SQL_DIAG_NUMBER, &numfields, SQL_IS_INTEGER, &diagbytes);
for (i = 0; i < numfields; i++) {
SQLGetDiagRec(SQL_HANDLE_DBC, tx->obj->con, i + 1, state, &nativeerror, diagnostic, sizeof(diagnostic), &diagbytes);
ast_str_append(&errors, 0, "%s%s", ast_str_strlen(errors) ? "," : "", state);
ast_log(LOG_WARNING, "SQLEndTran returned an error: %s: %s\n", state, diagnostic);
if (i > 10) {
ast_log(LOG_WARNING, "Oh, that was good. There are really %d diagnostics?\n", (int)numfields);
break;
}
}
pbx_builtin_setvar_helper(chan, "ROLLBACK_RESULT", ast_str_buffer(errors));
}
}
return 0;
}
static int aoro2_class_cb(void *obj, void *arg, int flags)
{
struct odbc_class *class = obj;
char *name = arg;
if (!strcmp(class->name, name) && !class->delme) {
return CMP_MATCH | CMP_STOP;
}
return 0;
}
#define USE_TX (void *)(long)1
#define NO_TX (void *)(long)2
#define EOR_TX (void *)(long)3
static int aoro2_obj_cb(void *vobj, void *arg, int flags)
{
struct odbc_obj *obj = vobj;
ast_mutex_lock(&obj->lock);
if ((arg == NO_TX && !obj->tx) || (arg == EOR_TX && !obj->used) || (arg == USE_TX && obj->tx && !obj->used)) {
obj->used = 1;
ast_mutex_unlock(&obj->lock);
return CMP_MATCH | CMP_STOP;
}
ast_mutex_unlock(&obj->lock);
return 0;
}
struct odbc_obj *_ast_odbc_request_obj2(const char *name, struct ast_flags flags, const char *file, const char *function, int lineno)
{
struct odbc_obj *obj = NULL;
struct odbc_class *class;
SQLINTEGER nativeerror=0, numfields=0;
SQLSMALLINT diagbytes=0, i;
unsigned char state[10], diagnostic[256];
if (!(class = ao2_callback(class_container, 0, aoro2_class_cb, (char *) name))) {
ast_debug(1, "Class '%s' not found!\n", name);
return NULL;
}
ast_assert(ao2_ref(class, 0) > 1);
if (class->haspool) {
/* Recycle connections before building another */
obj = ao2_callback(class->obj_container, 0, aoro2_obj_cb, EOR_TX);
if (obj) {
ast_assert(ao2_ref(obj, 0) > 1);
}
if (!obj && (ast_atomic_fetchadd_int(&class->count, +1) < class->limit) &&
(time(NULL) > class->last_negative_connect.tv_sec + class->negative_connection_cache.tv_sec)) {
obj = ao2_alloc(sizeof(*obj), odbc_obj_destructor);
if (!obj) {
class->count--;
ao2_ref(class, -1);
ast_debug(3, "Unable to allocate object\n");
ast_atomic_fetchadd_int(&class->count, -1);
return NULL;
}
ast_assert(ao2_ref(obj, 0) == 1);
ast_mutex_init(&obj->lock);
/* obj inherits the outstanding reference to class */
obj->parent = class;
class = NULL;
if (odbc_obj_connect(obj) == ODBC_FAIL) {
ast_log(LOG_WARNING, "Failed to connect to %s\n", name);
ast_assert(ao2_ref(obj->parent, 0) > 0);
/* Because it was never within the container, we have to manually decrement the count here */
ast_atomic_fetchadd_int(&obj->parent->count, -1);
ao2_ref(obj, -1);
obj = NULL;
} else {
obj->used = 1;
ao2_link(obj->parent->obj_container, obj);
}
} else {
/* If construction fails due to the limit (or negative timecache), reverse our increment. */
if (!obj) {
ast_atomic_fetchadd_int(&class->count, -1);
}
/* Object is not constructed, so delete outstanding reference to class. */
ao2_ref(class, -1);
class = NULL;
}
if (obj && ast_test_flag(&flags, RES_ODBC_INDEPENDENT_CONNECTION)) {
/* Ensure this connection has autocommit turned off. */
if (SQLSetConnectAttr(obj->con, SQL_ATTR_AUTOCOMMIT, (void *)SQL_AUTOCOMMIT_OFF, 0) == SQL_ERROR) {
SQLGetDiagField(SQL_HANDLE_DBC, obj->con, 1, SQL_DIAG_NUMBER, &numfields, SQL_IS_INTEGER, &diagbytes);
for (i = 0; i < numfields; i++) {
SQLGetDiagRec(SQL_HANDLE_DBC, obj->con, i + 1, state, &nativeerror, diagnostic, sizeof(diagnostic), &diagbytes);
ast_log(LOG_WARNING, "SQLSetConnectAttr (Autocommit) returned an error: %s: %s\n", state, diagnostic);
if (i > 10) {
ast_log(LOG_WARNING, "Oh, that was good. There are really %d diagnostics?\n", (int)numfields);
break;
}
}
}
}
} else if (ast_test_flag(&flags, RES_ODBC_INDEPENDENT_CONNECTION)) {
/* Non-pooled connections -- but must use a separate connection handle */
if (!(obj = ao2_callback(class->obj_container, 0, aoro2_obj_cb, USE_TX))) {
ast_debug(1, "Object not found\n");
obj = ao2_alloc(sizeof(*obj), odbc_obj_destructor);
if (!obj) {
ao2_ref(class, -1);
ast_debug(3, "Unable to allocate object\n");
return NULL;
}
ast_mutex_init(&obj->lock);
/* obj inherits the outstanding reference to class */
obj->parent = class;
class = NULL;
if (odbc_obj_connect(obj) == ODBC_FAIL) {
ast_log(LOG_WARNING, "Failed to connect to %s\n", name);
ao2_ref(obj, -1);
obj = NULL;
} else {
obj->used = 1;
ao2_link(obj->parent->obj_container, obj);
ast_atomic_fetchadd_int(&obj->parent->count, +1);
}
}
if (obj && SQLSetConnectAttr(obj->con, SQL_ATTR_AUTOCOMMIT, (void *)SQL_AUTOCOMMIT_OFF, 0) == SQL_ERROR) {
SQLGetDiagField(SQL_HANDLE_DBC, obj->con, 1, SQL_DIAG_NUMBER, &numfields, SQL_IS_INTEGER, &diagbytes);
for (i = 0; i < numfields; i++) {
SQLGetDiagRec(SQL_HANDLE_DBC, obj->con, i + 1, state, &nativeerror, diagnostic, sizeof(diagnostic), &diagbytes);
ast_log(LOG_WARNING, "SetConnectAttr (Autocommit) returned an error: %s: %s\n", state, diagnostic);
if (i > 10) {
ast_log(LOG_WARNING, "Oh, that was good. There are really %d diagnostics?\n", (int)numfields);
break;
}
}
}
} else {
/* Non-pooled connection: multiple modules can use the same connection. */
if ((obj = ao2_callback(class->obj_container, 0, aoro2_obj_cb, NO_TX))) {
/* Object is not constructed, so delete outstanding reference to class. */
ast_assert(ao2_ref(class, 0) > 1);
ao2_ref(class, -1);
class = NULL;
} else {
/* No entry: build one */
if (!(obj = ao2_alloc(sizeof(*obj), odbc_obj_destructor))) {
ast_assert(ao2_ref(class, 0) > 1);
ao2_ref(class, -1);
ast_debug(3, "Unable to allocate object\n");
return NULL;
}
ast_mutex_init(&obj->lock);
/* obj inherits the outstanding reference to class */
obj->parent = class;
class = NULL;
if (odbc_obj_connect(obj) == ODBC_FAIL) {
ast_log(LOG_WARNING, "Failed to connect to %s\n", name);
ao2_ref(obj, -1);
obj = NULL;
} else {
ao2_link(obj->parent->obj_container, obj);
ast_assert(ao2_ref(obj, 0) > 1);
}
}
if (obj && SQLSetConnectAttr(obj->con, SQL_ATTR_AUTOCOMMIT, (void *)SQL_AUTOCOMMIT_ON, 0) == SQL_ERROR) {
SQLGetDiagField(SQL_HANDLE_DBC, obj->con, 1, SQL_DIAG_NUMBER, &numfields, SQL_IS_INTEGER, &diagbytes);
for (i = 0; i < numfields; i++) {
SQLGetDiagRec(SQL_HANDLE_DBC, obj->con, i + 1, state, &nativeerror, diagnostic, sizeof(diagnostic), &diagbytes);
ast_log(LOG_WARNING, "SetConnectAttr (Autocommit) returned an error: %s: %s\n", state, diagnostic);
if (i > 10) {
ast_log(LOG_WARNING, "Oh, that was good. There are really %d diagnostics?\n", (int)numfields);
break;
}
}
}
}
/* Set the isolation property */
if (obj && SQLSetConnectAttr(obj->con, SQL_ATTR_TXN_ISOLATION, (void *)(long)obj->parent->isolation, 0) == SQL_ERROR) {
SQLGetDiagField(SQL_HANDLE_DBC, obj->con, 1, SQL_DIAG_NUMBER, &numfields, SQL_IS_INTEGER, &diagbytes);
for (i = 0; i < numfields; i++) {
SQLGetDiagRec(SQL_HANDLE_DBC, obj->con, i + 1, state, &nativeerror, diagnostic, sizeof(diagnostic), &diagbytes);
ast_log(LOG_WARNING, "SetConnectAttr (Txn isolation) returned an error: %s: %s\n", state, diagnostic);
if (i > 10) {
ast_log(LOG_WARNING, "Oh, that was good. There are really %d diagnostics?\n", (int)numfields);
break;
}
}
}
if (obj && ast_test_flag(&flags, RES_ODBC_CONNECTED) && !obj->up) {
/* Check if this connection qualifies for reconnection, with negative connection cache time */
if (time(NULL) > obj->parent->last_negative_connect.tv_sec + obj->parent->negative_connection_cache.tv_sec) {
odbc_obj_connect(obj);
}
} else if (obj && ast_test_flag(&flags, RES_ODBC_SANITY_CHECK)) {
ast_odbc_sanity_check(obj);
} else if (obj && obj->parent->idlecheck > 0 && ast_tvdiff_sec(ast_tvnow(), obj->last_used) > obj->parent->idlecheck) {
odbc_obj_connect(obj);
}
#ifdef DEBUG_THREADS
if (obj) {
ast_copy_string(obj->file, file, sizeof(obj->file));
ast_copy_string(obj->function, function, sizeof(obj->function));
obj->lineno = lineno;
}
#endif
ast_assert(class == NULL);
if (obj) {
ast_assert(ao2_ref(obj, 0) > 1);
}
return obj;
}
struct odbc_obj *_ast_odbc_request_obj(const char *name, int check, const char *file, const char *function, int lineno)
{
struct ast_flags flags = { check ? RES_ODBC_SANITY_CHECK : 0 };
return _ast_odbc_request_obj2(name, flags, file, function, lineno);
}
struct odbc_obj *ast_odbc_retrieve_transaction_obj(struct ast_channel *chan, const char *objname)
{
struct ast_datastore *txn_store;
AST_LIST_HEAD(, odbc_txn_frame) *oldlist;
struct odbc_txn_frame *txn = NULL;
if (!chan) {
/* No channel == no transaction */
return NULL;
}
ast_channel_lock(chan);
if ((txn_store = ast_channel_datastore_find(chan, &txn_info, NULL))) {
oldlist = txn_store->data;
} else {
ast_channel_unlock(chan);
return NULL;
}
AST_LIST_LOCK(oldlist);
ast_channel_unlock(chan);
AST_LIST_TRAVERSE(oldlist, txn, list) {
if (txn->obj && txn->obj->parent && !strcmp(txn->obj->parent->name, objname)) {
AST_LIST_UNLOCK(oldlist);
return txn->obj;
}
}
AST_LIST_UNLOCK(oldlist);
return NULL;
}
static odbc_status odbc_obj_disconnect(struct odbc_obj *obj)
{
int res;
SQLINTEGER err;
short int mlen;
unsigned char msg[200], state[10];
/* Nothing to disconnect */
if (!obj->con) {
return ODBC_SUCCESS;
}
ast_mutex_lock(&obj->lock);
res = SQLDisconnect(obj->con);
if (obj->parent) {
if (res == SQL_SUCCESS || res == SQL_SUCCESS_WITH_INFO) {
ast_debug(1, "Disconnected %d from %s [%s]\n", res, obj->parent->name, obj->parent->dsn);
} else {
ast_debug(1, "res_odbc: %s [%s] already disconnected\n", obj->parent->name, obj->parent->dsn);
}
}
if ((res = SQLFreeHandle(SQL_HANDLE_DBC, obj->con) == SQL_SUCCESS)) {
obj->con = NULL;
ast_debug(1, "Database handle deallocated\n");
} else {
SQLGetDiagRec(SQL_HANDLE_DBC, obj->con, 1, state, &err, msg, 100, &mlen);
ast_log(LOG_WARNING, "Unable to deallocate database handle? %d errno=%d %s\n", res, (int)err, msg);
}
obj->up = 0;
ast_mutex_unlock(&obj->lock);
return ODBC_SUCCESS;
}
static odbc_status odbc_obj_connect(struct odbc_obj *obj)
{
int res;
SQLINTEGER err;
short int mlen;
unsigned char msg[200], state[10];
#ifdef NEEDTRACE
SQLINTEGER enable = 1;
char *tracefile = "/tmp/odbc.trace";
#endif
ast_mutex_lock(&obj->lock);
if (obj->up) {
odbc_obj_disconnect(obj);
ast_log(LOG_NOTICE, "Re-connecting %s\n", obj->parent->name);
} else {
ast_log(LOG_NOTICE, "Connecting %s\n", obj->parent->name);
}
res = SQLAllocHandle(SQL_HANDLE_DBC, obj->parent->env, &obj->con);
if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
ast_log(LOG_WARNING, "res_odbc: Error AllocHDB %d\n", res);
obj->parent->last_negative_connect = ast_tvnow();
ast_mutex_unlock(&obj->lock);
return ODBC_FAIL;
}
SQLSetConnectAttr(obj->con, SQL_LOGIN_TIMEOUT, (SQLPOINTER *)(long) obj->parent->conntimeout, 0);
SQLSetConnectAttr(obj->con, SQL_ATTR_CONNECTION_TIMEOUT, (SQLPOINTER *)(long) obj->parent->conntimeout, 0);
#ifdef NEEDTRACE
SQLSetConnectAttr(obj->con, SQL_ATTR_TRACE, &enable, SQL_IS_INTEGER);
SQLSetConnectAttr(obj->con, SQL_ATTR_TRACEFILE, tracefile, strlen(tracefile));
#endif
res = SQLConnect(obj->con,
(SQLCHAR *) obj->parent->dsn, SQL_NTS,
(SQLCHAR *) obj->parent->username, SQL_NTS,
(SQLCHAR *) obj->parent->password, SQL_NTS);
if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
SQLGetDiagRec(SQL_HANDLE_DBC, obj->con, 1, state, &err, msg, 100, &mlen);
obj->parent->last_negative_connect = ast_tvnow();
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->parent->name, obj->parent->dsn);
obj->up = 1;
obj->last_used = ast_tvnow();
}
ast_mutex_unlock(&obj->lock);
return ODBC_SUCCESS;
}
static int acf_transaction_read(struct ast_channel *chan, const char *cmd, char *data, char *buf, size_t len)
{
AST_DECLARE_APP_ARGS(args,
AST_APP_ARG(property);
AST_APP_ARG(opt);
);
struct odbc_txn_frame *tx;
AST_STANDARD_APP_ARGS(args, data);
if (strcasecmp(args.property, "transaction") == 0) {
if ((tx = find_transaction(chan, NULL, NULL, 1))) {
ast_copy_string(buf, tx->name, len);
return 0;
}
} else if (strcasecmp(args.property, "isolation") == 0) {
if (!ast_strlen_zero(args.opt)) {
tx = find_transaction(chan, NULL, args.opt, 0);
} else {
tx = find_transaction(chan, NULL, NULL, 1);
}
if (tx) {
ast_copy_string(buf, isolation2text(tx->isolation), len);
return 0;
}
} else if (strcasecmp(args.property, "forcecommit") == 0) {
if (!ast_strlen_zero(args.opt)) {
tx = find_transaction(chan, NULL, args.opt, 0);
} else {
tx = find_transaction(chan, NULL, NULL, 1);
}
if (tx) {
ast_copy_string(buf, tx->forcecommit ? "1" : "0", len);
return 0;
}
}
return -1;
}
static int acf_transaction_write(struct ast_channel *chan, const char *cmd, char *s, const char *value)
{
AST_DECLARE_APP_ARGS(args,
AST_APP_ARG(property);
AST_APP_ARG(opt);
);
struct odbc_txn_frame *tx;
SQLINTEGER nativeerror=0, numfields=0;
SQLSMALLINT diagbytes=0, i;
unsigned char state[10], diagnostic[256];
AST_STANDARD_APP_ARGS(args, s);
if (strcasecmp(args.property, "transaction") == 0) {
/* Set active transaction */
struct odbc_obj *obj;
if ((tx = find_transaction(chan, NULL, value, 0))) {
mark_transaction_active(chan, tx);
} else {
/* No such transaction, create one */
struct ast_flags flags = { RES_ODBC_INDEPENDENT_CONNECTION };
if (ast_strlen_zero(args.opt) || !(obj = ast_odbc_request_obj2(args.opt, flags))) {
ast_log(LOG_ERROR, "Could not create transaction: invalid database specification '%s'\n", S_OR(args.opt, ""));
pbx_builtin_setvar_helper(chan, "ODBC_RESULT", "INVALID_DB");
return -1;
}
if (!(tx = find_transaction(chan, obj, value, 0))) {
pbx_builtin_setvar_helper(chan, "ODBC_RESULT", "FAILED_TO_CREATE");
return -1;
}
obj->tx = 1;
}
pbx_builtin_setvar_helper(chan, "ODBC_RESULT", "OK");
return 0;
} else if (strcasecmp(args.property, "forcecommit") == 0) {
/* Set what happens when an uncommitted transaction ends without explicit Commit or Rollback */
if (ast_strlen_zero(args.opt)) {
tx = find_transaction(chan, NULL, NULL, 1);
} else {
tx = find_transaction(chan, NULL, args.opt, 0);
}
if (!tx) {
pbx_builtin_setvar_helper(chan, "ODBC_RESULT", "FAILED_TO_CREATE");
return -1;
}
if (ast_true(value)) {
tx->forcecommit = 1;
} else if (ast_false(value)) {
tx->forcecommit = 0;
} else {
ast_log(LOG_ERROR, "Invalid value for forcecommit: '%s'\n", S_OR(value, ""));
pbx_builtin_setvar_helper(chan, "ODBC_RESULT", "INVALID_VALUE");
return -1;
}
pbx_builtin_setvar_helper(chan, "ODBC_RESULT", "OK");
return 0;
} else if (strcasecmp(args.property, "isolation") == 0) {
/* How do uncommitted transactions affect reads? */
int isolation = text2isolation(value);
if (ast_strlen_zero(args.opt)) {
tx = find_transaction(chan, NULL, NULL, 1);
} else {
tx = find_transaction(chan, NULL, args.opt, 0);
}
if (!tx) {
pbx_builtin_setvar_helper(chan, "ODBC_RESULT", "FAILED_TO_CREATE");
return -1;
}
if (isolation == 0) {
pbx_builtin_setvar_helper(chan, "ODBC_RESULT", "INVALID_VALUE");
ast_log(LOG_ERROR, "Invalid isolation specification: '%s'\n", S_OR(value, ""));
} else if (SQLSetConnectAttr(tx->obj->con, SQL_ATTR_TXN_ISOLATION, (void *)(long)isolation, 0) == SQL_ERROR) {
pbx_builtin_setvar_helper(chan, "ODBC_RESULT", "SQL_ERROR");
SQLGetDiagField(SQL_HANDLE_DBC, tx->obj->con, 1, SQL_DIAG_NUMBER, &numfields, SQL_IS_INTEGER, &diagbytes);
for (i = 0; i < numfields; i++) {
SQLGetDiagRec(SQL_HANDLE_DBC, tx->obj->con, i + 1, state, &nativeerror, diagnostic, sizeof(diagnostic), &diagbytes);
ast_log(LOG_WARNING, "SetConnectAttr (Txn isolation) returned an error: %s: %s\n", state, diagnostic);
if (i > 10) {
ast_log(LOG_WARNING, "Oh, that was good. There are really %d diagnostics?\n", (int)numfields);
break;
}
}
} else {
pbx_builtin_setvar_helper(chan, "ODBC_RESULT", "OK");
tx->isolation = isolation;
}
return 0;
} else {
ast_log(LOG_ERROR, "Unknown property: '%s'\n", args.property);
return -1;
}
}
static struct ast_custom_function odbc_function = {
.name = "ODBC",
.read = acf_transaction_read,
.write = acf_transaction_write,
};
static const char * const app_commit = "ODBC_Commit";
static const char * const app_rollback = "ODBC_Rollback";
/*!
* \internal
* \brief Implements the channels provider.
*/
static int data_odbc_provider_handler(const struct ast_data_search *search,
struct ast_data *root)
{
struct ao2_iterator aoi, aoi2;
struct odbc_class *class;
struct odbc_obj *current;
struct ast_data *data_odbc_class, *data_odbc_connections, *data_odbc_connection;
struct ast_data *enum_node;
int count;
aoi = ao2_iterator_init(class_container, 0);
while ((class = ao2_iterator_next(&aoi))) {
data_odbc_class = ast_data_add_node(root, "class");
if (!data_odbc_class) {
ao2_ref(class, -1);
continue;
}
ast_data_add_structure(odbc_class, data_odbc_class, class);
if (!ao2_container_count(class->obj_container)) {
ao2_ref(class, -1);
continue;
}
data_odbc_connections = ast_data_add_node(data_odbc_class, "connections");
if (!data_odbc_connections) {
ao2_ref(class, -1);
continue;
}
ast_data_add_bool(data_odbc_class, "shared", !class->haspool);
/* isolation */
enum_node = ast_data_add_node(data_odbc_class, "isolation");
if (!enum_node) {
ao2_ref(class, -1);
continue;
}
ast_data_add_int(enum_node, "value", class->isolation);
ast_data_add_str(enum_node, "text", isolation2text(class->isolation));
count = 0;
aoi2 = ao2_iterator_init(class->obj_container, 0);
while ((current = ao2_iterator_next(&aoi2))) {
data_odbc_connection = ast_data_add_node(data_odbc_connections, "connection");
if (!data_odbc_connection) {
ao2_ref(current, -1);
continue;
}
ast_mutex_lock(&current->lock);
ast_data_add_str(data_odbc_connection, "status", current->used ? "in use" :
current->up && ast_odbc_sanity_check(current) ? "connected" : "disconnected");
ast_data_add_bool(data_odbc_connection, "transactional", current->tx);
ast_mutex_unlock(&current->lock);
if (class->haspool) {
ast_data_add_int(data_odbc_connection, "number", ++count);
}
ao2_ref(current, -1);
}
ao2_ref(class, -1);
if (!ast_data_search_match(search, data_odbc_class)) {
ast_data_remove_node(root, data_odbc_class);
}
}
return 0;
}
/*!
* \internal
* \brief /asterisk/res/odbc/listprovider.
*/
static const struct ast_data_handler odbc_provider = {
.version = AST_DATA_HANDLER_VERSION,
.get = data_odbc_provider_handler
};
static const struct ast_data_entry odbc_providers[] = {
AST_DATA_ENTRY("/asterisk/res/odbc", &odbc_provider),
};
static int reload(void)
{
struct odbc_cache_tables *table;
struct odbc_class *class;
struct odbc_obj *current;
struct ao2_iterator aoi = ao2_iterator_init(class_container, 0);
/* First, mark all to be purged */
while ((class = ao2_iterator_next(&aoi))) {
class->delme = 1;
ao2_ref(class, -1);
}
ao2_iterator_destroy(&aoi);
load_odbc_config();
/* Purge remaining classes */
/* Note on how this works; this is a case of circular references, so we
* explicitly do NOT want to use a callback here (or we wind up in
* recursive hell).
*
* 1. Iterate through all the classes. Note that the classes will currently
* contain two classes of the same name, one of which is marked delme and
* will be purged when all remaining objects of the class are released, and
* the other, which was created above when we re-parsed the config file.
* 2. On each class, there is a reference held by the master container and
* a reference held by each connection object. There are two cases for
* destruction of the class, noted below. However, in all cases, all O-refs
* (references to objects) will first be freed, which will cause the C-refs
* (references to classes) to be decremented (but never to 0, because the
* class container still has a reference).
* a) If the class has outstanding objects, the C-ref by the class
* container will then be freed, which leaves only C-refs by any
* outstanding objects. When the final outstanding object is released
* (O-refs held by applications and dialplan functions), it will in turn
* free the final C-ref, causing class destruction.
* b) If the class has no outstanding objects, when the class container
* removes the final C-ref, the class will be destroyed.
*/
aoi = ao2_iterator_init(class_container, 0);
while ((class = ao2_iterator_next(&aoi))) { /* C-ref++ (by iterator) */
if (class->delme) {
struct ao2_iterator aoi2 = ao2_iterator_init(class->obj_container, 0);
while ((current = ao2_iterator_next(&aoi2))) { /* O-ref++ (by iterator) */
ao2_unlink(class->obj_container, current); /* unlink O-ref from class (reference handled implicitly) */
ao2_ref(current, -1); /* O-ref-- (by iterator) */
/* At this point, either
* a) there's an outstanding O-ref, or
* b) the object has already been destroyed.
*/
}
ao2_iterator_destroy(&aoi2);
ao2_unlink(class_container, class); /* unlink C-ref from container (reference handled implicitly) */
/* At this point, either
* a) there's an outstanding O-ref, which holds an outstanding C-ref, or
* b) the last remaining C-ref is held by the iterator, which will be
* destroyed in the next step.
*/
}
ao2_ref(class, -1); /* C-ref-- (by iterator) */
}
ao2_iterator_destroy(&aoi);
/* Empty the cache; it will get rebuilt the next time the tables are needed. */
AST_RWLIST_WRLOCK(&odbc_tables);
while ((table = AST_RWLIST_REMOVE_HEAD(&odbc_tables, list))) {
destroy_table_cache(table);
}
AST_RWLIST_UNLOCK(&odbc_tables);
return 0;
}
static int unload_module(void)
{
/* Prohibit unloading */
return -1;
}
static int load_module(void)
{
if (!(class_container = ao2_container_alloc(1, null_hash_fn, ao2_match_by_addr)))
return AST_MODULE_LOAD_DECLINE;
if (load_odbc_config() == -1)
return AST_MODULE_LOAD_DECLINE;
ast_cli_register_multiple(cli_odbc, ARRAY_LEN(cli_odbc));
ast_data_register_multiple(odbc_providers, ARRAY_LEN(odbc_providers));
ast_register_application_xml(app_commit, commit_exec);
ast_register_application_xml(app_rollback, rollback_exec);
ast_custom_function_register(&odbc_function);
ast_log(LOG_NOTICE, "res_odbc loaded.\n");
return 0;
}
AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_GLOBAL_SYMBOLS | AST_MODFLAG_LOAD_ORDER, "ODBC resource",
.load = load_module,
.unload = unload_module,
.reload = reload,
.load_pri = AST_MODPRI_REALTIME_DEPEND,
);
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