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asterisk/funcs/func_odbc.c
Tilghman Lesher da0138932e Handle OOM errors more gracefully. 
(closes issue #17084)
 Reported by: falves11
 Patches: 
       issue17084_162_A.diff uploaded by falves11 (license 374)
 Tested by: falves11


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@267669 65c4cc65-6c06-0410-ace0-fbb531ad65f3
2010-06-03 19:46:42 +00:00

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/*
* Asterisk -- An open source telephony toolkit.
*
* Copyright (c) 2005, 2006 Tilghman Lesher
* Copyright (c) 2008, 2009 Digium, Inc.
*
* Tilghman Lesher <func_odbc__200508@the-tilghman.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 lookups
*
* \author Tilghman Lesher <func_odbc__200508@the-tilghman.com>
*
* \ingroup functions
*/
/*** MODULEINFO
<depend>res_odbc</depend>
***/
#include "asterisk.h"
ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
#include "asterisk/module.h"
#include "asterisk/file.h"
#include "asterisk/channel.h"
#include "asterisk/pbx.h"
#include "asterisk/config.h"
#include "asterisk/res_odbc.h"
#include "asterisk/app.h"
#include "asterisk/cli.h"
#include "asterisk/strings.h"
/*** DOCUMENTATION
<function name="ODBC_FETCH" language="en_US">
<synopsis>
Fetch a row from a multirow query.
</synopsis>
<syntax>
<parameter name="result-id" required="true" />
</syntax>
<description>
<para>For queries which are marked as mode=multirow, the original
query returns a <replaceable>result-id</replaceable> from which results
may be fetched. This function implements the actual fetch of the results.</para>
<para>This also sets <variable>ODBC_FETCH_STATUS</variable>.</para>
<variablelist>
<variable name="ODBC_FETCH_STATUS">
<value name="SUCESS">
If rows are available.
</value>
<value name="FAILURE">
If no rows are available.
</value>
</variable>
</variablelist>
</description>
</function>
<application name="ODBCFinish" language="en_US">
<synopsis>
Clear the resultset of a sucessful multirow query.
</synopsis>
<syntax>
<parameter name="result-id" required="true" />
</syntax>
<description>
<para>For queries which are marked as mode=multirow, this will clear
any remaining rows of the specified resultset.</para>
</description>
</application>
<function name="SQL_ESC" language="en_US">
<synopsis>
Escapes single ticks for use in SQL statements.
</synopsis>
<syntax>
<parameter name="string" required="true" />
</syntax>
<description>
<para>Used in SQL templates to escape data which may contain single ticks
<literal>'</literal> which are otherwise used to delimit data.</para>
<para>Example: SELECT foo FROM bar WHERE baz='${SQL_ESC(${ARG1})}'</para>
</description>
</function>
***/
static char *config = "func_odbc.conf";
enum odbc_option_flags {
OPT_ESCAPECOMMAS = (1 << 0),
OPT_MULTIROW = (1 << 1),
};
struct acf_odbc_query {
AST_RWLIST_ENTRY(acf_odbc_query) list;
char readhandle[5][30];
char writehandle[5][30];
char sql_read[2048];
char sql_write[2048];
char sql_insert[2048];
unsigned int flags;
int rowlimit;
struct ast_custom_function *acf;
};
static void odbc_datastore_free(void *data);
static struct ast_datastore_info odbc_info = {
.type = "FUNC_ODBC",
.destroy = odbc_datastore_free,
};
/* For storing each result row */
struct odbc_datastore_row {
AST_LIST_ENTRY(odbc_datastore_row) list;
char data[0];
};
/* For storing each result set */
struct odbc_datastore {
AST_LIST_HEAD(, odbc_datastore_row);
char names[0];
};
static AST_RWLIST_HEAD_STATIC(queries, acf_odbc_query);
static int resultcount = 0;
AST_THREADSTORAGE(sql_buf);
AST_THREADSTORAGE(sql2_buf);
AST_THREADSTORAGE(coldata_buf);
AST_THREADSTORAGE(colnames_buf);
static int acf_fetch(struct ast_channel *chan, const char *cmd, char *data, char *buf, size_t len);
static void odbc_datastore_free(void *data)
{
struct odbc_datastore *result = data;
struct odbc_datastore_row *row;
AST_LIST_LOCK(result);
while ((row = AST_LIST_REMOVE_HEAD(result, list))) {
ast_free(row);
}
AST_LIST_UNLOCK(result);
AST_LIST_HEAD_DESTROY(result);
ast_free(result);
}
static SQLHSTMT generic_execute(struct odbc_obj *obj, void *data)
{
int res;
char *sql = data;
SQLHSTMT stmt;
res = SQLAllocHandle (SQL_HANDLE_STMT, obj->con, &stmt);
if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
ast_log(LOG_WARNING, "SQL Alloc Handle failed (%d)!\n", res);
return NULL;
}
res = SQLExecDirect(stmt, (unsigned char *)sql, SQL_NTS);
if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
if (res == SQL_ERROR) {
int i;
SQLINTEGER nativeerror=0, numfields=0;
SQLSMALLINT diagbytes=0;
unsigned char state[10], diagnostic[256];
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;
}
}
}
ast_log(LOG_WARNING, "SQL Exec Direct failed (%d)![%s]\n", res, sql);
SQLCloseCursor(stmt);
SQLFreeHandle(SQL_HANDLE_STMT, stmt);
return NULL;
}
return stmt;
}
/*
* Master control routine
*/
static int acf_odbc_write(struct ast_channel *chan, const char *cmd, char *s, const char *value)
{
struct odbc_obj *obj = NULL;
struct acf_odbc_query *query;
char *t, varname[15];
int i, dsn, bogus_chan = 0;
int transactional = 0;
AST_DECLARE_APP_ARGS(values,
AST_APP_ARG(field)[100];
);
AST_DECLARE_APP_ARGS(args,
AST_APP_ARG(field)[100];
);
SQLHSTMT stmt = NULL;
SQLLEN rows=0;
struct ast_str *buf = ast_str_thread_get(&sql_buf, 16);
struct ast_str *insertbuf = ast_str_thread_get(&sql2_buf, 16);
const char *status = "FAILURE";
if (!buf || !insertbuf) {
return -1;
}
AST_RWLIST_RDLOCK(&queries);
AST_RWLIST_TRAVERSE(&queries, query, list) {
if (!strcmp(query->acf->name, cmd)) {
break;
}
}
if (!query) {
ast_log(LOG_ERROR, "No such function '%s'\n", cmd);
AST_RWLIST_UNLOCK(&queries);
if (chan) {
pbx_builtin_setvar_helper(chan, "ODBCSTATUS", status);
}
return -1;
}
if (!chan) {
if (!(chan = ast_dummy_channel_alloc())) {
AST_RWLIST_UNLOCK(&queries);
return -1;
}
bogus_chan = 1;
}
if (!bogus_chan) {
ast_autoservice_start(chan);
}
ast_str_make_space(&buf, strlen(query->sql_write) * 2 + 300);
ast_str_make_space(&insertbuf, strlen(query->sql_insert) * 2 + 300);
/* Parse our arguments */
t = value ? ast_strdupa(value) : "";
if (!s || !t) {
ast_log(LOG_ERROR, "Out of memory\n");
AST_RWLIST_UNLOCK(&queries);
if (!bogus_chan) {
ast_autoservice_stop(chan);
pbx_builtin_setvar_helper(chan, "ODBCSTATUS", status);
} else {
ast_channel_release(chan);
}
return -1;
}
AST_STANDARD_APP_ARGS(args, s);
for (i = 0; i < args.argc; i++) {
snprintf(varname, sizeof(varname), "ARG%d", i + 1);
pbx_builtin_pushvar_helper(chan, varname, args.field[i]);
}
/* Parse values, just like arguments */
AST_STANDARD_APP_ARGS(values, t);
for (i = 0; i < values.argc; i++) {
snprintf(varname, sizeof(varname), "VAL%d", i + 1);
pbx_builtin_pushvar_helper(chan, varname, values.field[i]);
}
/* Additionally set the value as a whole (but push an empty string if value is NULL) */
pbx_builtin_pushvar_helper(chan, "VALUE", value ? value : "");
ast_str_substitute_variables(&buf, 0, chan, query->sql_write);
ast_str_substitute_variables(&insertbuf, 0, chan, query->sql_insert);
if (bogus_chan) {
chan = ast_channel_release(chan);
} else {
/* Restore prior values */
for (i = 0; i < args.argc; i++) {
snprintf(varname, sizeof(varname), "ARG%d", i + 1);
pbx_builtin_setvar_helper(chan, varname, NULL);
}
for (i = 0; i < values.argc; i++) {
snprintf(varname, sizeof(varname), "VAL%d", i + 1);
pbx_builtin_setvar_helper(chan, varname, NULL);
}
pbx_builtin_setvar_helper(chan, "VALUE", NULL);
/*!\note
* Okay, this part is confusing. Transactions belong to a single database
* handle. Therefore, when working with transactions, we CANNOT failover
* to multiple DSNs. We MUST have a single handle all the way through the
* transaction, or else we CANNOT enforce atomicity.
*/
for (dsn = 0; dsn < 5; dsn++) {
if (transactional) {
/* This can only happen second time through or greater. */
ast_log(LOG_WARNING, "Transactions do not work well with multiple DSNs for 'writehandle'\n");
}
if (!ast_strlen_zero(query->writehandle[dsn])) {
if ((obj = ast_odbc_retrieve_transaction_obj(chan, query->writehandle[dsn]))) {
transactional = 1;
} else {
obj = ast_odbc_request_obj(query->writehandle[dsn], 0);
transactional = 0;
}
if (obj && (stmt = ast_odbc_direct_execute(obj, generic_execute, ast_str_buffer(buf)))) {
break;
}
}
if (obj && !transactional) {
ast_odbc_release_obj(obj);
obj = NULL;
}
}
}
if (stmt && rows == 0 && ast_str_strlen(insertbuf) != 0) {
SQLCloseCursor(stmt);
SQLFreeHandle(SQL_HANDLE_STMT, stmt);
for (dsn = 0; dsn < 5; dsn++) {
if (!ast_strlen_zero(query->writehandle[dsn])) {
obj = ast_odbc_request_obj(query->writehandle[dsn], 0);
if (obj) {
stmt = ast_odbc_direct_execute(obj, generic_execute, ast_str_buffer(insertbuf));
}
}
if (stmt) {
status = "FAILOVER";
SQLRowCount(stmt, &rows);
break;
}
ast_odbc_release_obj(obj);
obj = NULL;
}
} else if (stmt) {
status = "SUCCESS";
SQLRowCount(stmt, &rows);
}
AST_RWLIST_UNLOCK(&queries);
/* Output the affected rows, for all cases. In the event of failure, we
* flag this as -1 rows. Note that this is different from 0 affected rows
* which would be the case if we succeeded in our query, but the values did
* not change. */
if (!bogus_chan) {
snprintf(varname, sizeof(varname), "%d", (int)rows);
pbx_builtin_setvar_helper(chan, "ODBCROWS", varname);
pbx_builtin_setvar_helper(chan, "ODBCSTATUS", status);
}
if (stmt) {
SQLCloseCursor(stmt);
SQLFreeHandle(SQL_HANDLE_STMT, stmt);
}
if (obj && !transactional) {
ast_odbc_release_obj(obj);
obj = NULL;
}
if (!bogus_chan) {
ast_autoservice_stop(chan);
}
return 0;
}
static int acf_odbc_read(struct ast_channel *chan, const char *cmd, char *s, char *buf, size_t len)
{
struct odbc_obj *obj = NULL;
struct acf_odbc_query *query;
char varname[15], rowcount[12] = "-1";
struct ast_str *colnames = ast_str_thread_get(&colnames_buf, 16);
int res, x, y, buflen = 0, escapecommas, rowlimit = 1, multirow = 0, dsn, bogus_chan = 0;
AST_DECLARE_APP_ARGS(args,
AST_APP_ARG(field)[100];
);
SQLHSTMT stmt = NULL;
SQLSMALLINT colcount=0;
SQLLEN indicator;
SQLSMALLINT collength;
struct odbc_datastore *resultset = NULL;
struct odbc_datastore_row *row = NULL;
struct ast_str *sql = ast_str_thread_get(&sql_buf, 16);
const char *status = "FAILURE";
if (!sql || !colnames) {
if (chan) {
pbx_builtin_setvar_helper(chan, "ODBCSTATUS", status);
}
return -1;
}
ast_str_reset(colnames);
AST_RWLIST_RDLOCK(&queries);
AST_RWLIST_TRAVERSE(&queries, query, list) {
if (!strcmp(query->acf->name, cmd)) {
break;
}
}
if (!query) {
ast_log(LOG_ERROR, "No such function '%s'\n", cmd);
AST_RWLIST_UNLOCK(&queries);
if (chan) {
pbx_builtin_setvar_helper(chan, "ODBCROWS", rowcount);
pbx_builtin_setvar_helper(chan, "ODBCSTATUS", status);
}
return -1;
}
if (!chan) {
if (!(chan = ast_dummy_channel_alloc())) {
AST_RWLIST_UNLOCK(&queries);
return -1;
}
bogus_chan = 1;
}
if (!bogus_chan) {
ast_autoservice_start(chan);
}
AST_STANDARD_APP_ARGS(args, s);
for (x = 0; x < args.argc; x++) {
snprintf(varname, sizeof(varname), "ARG%d", x + 1);
pbx_builtin_pushvar_helper(chan, varname, args.field[x]);
}
ast_str_substitute_variables(&sql, 0, chan, query->sql_read);
if (bogus_chan) {
chan = ast_channel_release(chan);
} else {
/* Restore prior values */
for (x = 0; x < args.argc; x++) {
snprintf(varname, sizeof(varname), "ARG%d", x + 1);
pbx_builtin_setvar_helper(chan, varname, NULL);
}
}
/* Save these flags, so we can release the lock */
escapecommas = ast_test_flag(query, OPT_ESCAPECOMMAS);
if (!bogus_chan && ast_test_flag(query, OPT_MULTIROW)) {
if (!(resultset = ast_calloc(1, sizeof(*resultset)))) {
pbx_builtin_setvar_helper(chan, "ODBCROWS", rowcount);
pbx_builtin_setvar_helper(chan, "ODBCSTATUS", status);
ast_autoservice_stop(chan);
return -1;
}
AST_LIST_HEAD_INIT(resultset);
if (query->rowlimit) {
rowlimit = query->rowlimit;
} else {
rowlimit = INT_MAX;
}
multirow = 1;
} else if (!bogus_chan) {
if (query->rowlimit > 1) {
rowlimit = query->rowlimit;
if (!(resultset = ast_calloc(1, sizeof(*resultset)))) {
pbx_builtin_setvar_helper(chan, "ODBCROWS", rowcount);
pbx_builtin_setvar_helper(chan, "ODBCSTATUS", status);
ast_autoservice_stop(chan);
return -1;
}
AST_LIST_HEAD_INIT(resultset);
}
}
AST_RWLIST_UNLOCK(&queries);
for (dsn = 0; dsn < 5; dsn++) {
if (!ast_strlen_zero(query->readhandle[dsn])) {
obj = ast_odbc_request_obj(query->readhandle[dsn], 0);
if (obj) {
stmt = ast_odbc_direct_execute(obj, generic_execute, ast_str_buffer(sql));
}
}
if (stmt) {
break;
}
ast_odbc_release_obj(obj);
obj = NULL;
}
if (!stmt) {
ast_log(LOG_ERROR, "Unable to execute query [%s]\n", ast_str_buffer(sql));
if (obj) {
ast_odbc_release_obj(obj);
obj = NULL;
}
if (!bogus_chan) {
pbx_builtin_setvar_helper(chan, "ODBCROWS", rowcount);
ast_autoservice_stop(chan);
}
return -1;
}
res = SQLNumResultCols(stmt, &colcount);
if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
ast_log(LOG_WARNING, "SQL Column Count error!\n[%s]\n\n", ast_str_buffer(sql));
SQLCloseCursor(stmt);
SQLFreeHandle (SQL_HANDLE_STMT, stmt);
ast_odbc_release_obj(obj);
obj = NULL;
if (!bogus_chan) {
pbx_builtin_setvar_helper(chan, "ODBCROWS", rowcount);
ast_autoservice_stop(chan);
}
return -1;
}
res = SQLFetch(stmt);
if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
int res1 = -1;
if (res == SQL_NO_DATA) {
ast_verb(4, "Found no rows [%s]\n", ast_str_buffer(sql));
res1 = 0;
buf[0] = '\0';
ast_copy_string(rowcount, "0", sizeof(rowcount));
status = "NODATA";
} else {
ast_log(LOG_WARNING, "Error %d in FETCH [%s]\n", res, ast_str_buffer(sql));
status = "FETCHERROR";
}
SQLCloseCursor(stmt);
SQLFreeHandle(SQL_HANDLE_STMT, stmt);
ast_odbc_release_obj(obj);
obj = NULL;
if (!bogus_chan) {
pbx_builtin_setvar_helper(chan, "ODBCROWS", rowcount);
pbx_builtin_setvar_helper(chan, "ODBCSTATUS", status);
ast_autoservice_stop(chan);
}
return res1;
}
status = "SUCCESS";
for (y = 0; y < rowlimit; y++) {
buf[0] = '\0';
for (x = 0; x < colcount; x++) {
int i;
struct ast_str *coldata = ast_str_thread_get(&coldata_buf, 16);
char *ptrcoldata;
if (!coldata) {
ast_free(resultset);
SQLCloseCursor(stmt);
SQLFreeHandle(SQL_HANDLE_STMT, stmt);
ast_odbc_release_obj(obj);
obj = NULL;
pbx_builtin_setvar_helper(chan, "ODBCSTATUS", "MEMERROR");
if (chan)
ast_autoservice_stop(chan);
if (bogus_chan) {
ast_channel_release(chan);
}
return -1;
}
if (y == 0) {
char colname[256];
SQLULEN maxcol;
res = SQLDescribeCol(stmt, x + 1, (unsigned char *)colname, sizeof(colname), &collength, NULL, &maxcol, NULL, NULL);
ast_debug(3, "Got collength of %d and maxcol of %d for column '%s' (offset %d)\n", (int)collength, (int)maxcol, colname, x);
if (((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) || collength == 0) {
snprintf(colname, sizeof(colname), "field%d", x);
}
ast_str_make_space(&coldata, maxcol + 1);
if (ast_str_strlen(colnames)) {
ast_str_append(&colnames, 0, ",");
}
ast_str_append_escapecommas(&colnames, 0, colname, sizeof(colname));
if (resultset) {
void *tmp = ast_realloc(resultset, sizeof(*resultset) + ast_str_strlen(colnames) + 1);
if (!tmp) {
ast_log(LOG_ERROR, "No space for a new resultset?\n");
ast_free(resultset);
SQLCloseCursor(stmt);
SQLFreeHandle(SQL_HANDLE_STMT, stmt);
ast_odbc_release_obj(obj);
obj = NULL;
pbx_builtin_setvar_helper(chan, "ODBCROWS", rowcount);
pbx_builtin_setvar_helper(chan, "ODBCSTATUS", "MEMERROR");
ast_autoservice_stop(chan);
return -1;
}
resultset = tmp;
strcpy((char *)resultset + sizeof(*resultset), ast_str_buffer(colnames));
}
}
buflen = strlen(buf);
res = ast_odbc_ast_str_SQLGetData(&coldata, -1, stmt, x + 1, SQL_CHAR, &indicator);
if (indicator == SQL_NULL_DATA) {
ast_debug(3, "Got NULL data\n");
ast_str_reset(coldata);
res = SQL_SUCCESS;
}
if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
ast_log(LOG_WARNING, "SQL Get Data error!\n[%s]\n\n", ast_str_buffer(sql));
y = -1;
buf[0] = '\0';
goto end_acf_read;
}
ast_debug(2, "Got coldata of '%s'\n", ast_str_buffer(coldata));
if (x) {
buf[buflen++] = ',';
}
/* Copy data, encoding '\' and ',' for the argument parser */
ptrcoldata = ast_str_buffer(coldata);
for (i = 0; i < ast_str_strlen(coldata); i++) {
if (escapecommas && (ptrcoldata[i] == '\\' || ptrcoldata[i] == ',')) {
buf[buflen++] = '\\';
}
buf[buflen++] = ptrcoldata[i];
if (buflen >= len - 2) {
break;
}
if (ptrcoldata[i] == '\0') {
break;
}
}
buf[buflen] = '\0';
ast_debug(2, "buf is now set to '%s'\n", buf);
}
ast_debug(2, "buf is now set to '%s'\n", buf);
if (resultset) {
row = ast_calloc(1, sizeof(*row) + buflen + 1);
if (!row) {
ast_log(LOG_ERROR, "Unable to allocate space for more rows in this resultset.\n");
status = "MEMERROR";
goto end_acf_read;
}
strcpy((char *)row + sizeof(*row), buf);
AST_LIST_INSERT_TAIL(resultset, row, list);
/* Get next row */
res = SQLFetch(stmt);
if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
if (res != SQL_NO_DATA) {
ast_log(LOG_WARNING, "Error %d in FETCH [%s]\n", res, ast_str_buffer(sql));
}
/* Number of rows in the resultset */
y++;
break;
}
}
}
end_acf_read:
if (!bogus_chan) {
snprintf(rowcount, sizeof(rowcount), "%d", y);
pbx_builtin_setvar_helper(chan, "ODBCROWS", rowcount);
pbx_builtin_setvar_helper(chan, "ODBCSTATUS", status);
pbx_builtin_setvar_helper(chan, "~ODBCFIELDS~", ast_str_buffer(colnames));
if (resultset) {
int uid;
struct ast_datastore *odbc_store;
if (multirow) {
uid = ast_atomic_fetchadd_int(&resultcount, +1) + 1;
snprintf(buf, len, "%d", uid);
} else {
/* Name of the query is name of the resultset */
ast_copy_string(buf, cmd, len);
/* If there's one with the same name already, free it */
ast_channel_lock(chan);
if ((odbc_store = ast_channel_datastore_find(chan, &odbc_info, buf))) {
ast_channel_datastore_remove(chan, odbc_store);
odbc_datastore_free(odbc_store->data);
ast_free(odbc_store);
}
ast_channel_unlock(chan);
}
odbc_store = ast_datastore_alloc(&odbc_info, buf);
if (!odbc_store) {
ast_log(LOG_ERROR, "Rows retrieved, but unable to store it in the channel. Results fail.\n");
odbc_datastore_free(resultset);
SQLCloseCursor(stmt);
SQLFreeHandle(SQL_HANDLE_STMT, stmt);
ast_odbc_release_obj(obj);
obj = NULL;
pbx_builtin_setvar_helper(chan, "ODBCSTATUS", "MEMERROR");
ast_autoservice_stop(chan);
return -1;
}
odbc_store->data = resultset;
ast_channel_datastore_add(chan, odbc_store);
}
}
SQLCloseCursor(stmt);
SQLFreeHandle(SQL_HANDLE_STMT, stmt);
ast_odbc_release_obj(obj);
obj = NULL;
if (resultset && !multirow) {
/* Fetch the first resultset */
if (!acf_fetch(chan, "", buf, buf, len)) {
buf[0] = '\0';
}
}
if (!bogus_chan) {
ast_autoservice_stop(chan);
}
return 0;
}
static int acf_escape(struct ast_channel *chan, const char *cmd, char *data, char *buf, size_t len)
{
char *out = buf;
for (; *data && out - buf < len; data++) {
if (*data == '\'') {
*out = '\'';
out++;
}
*out++ = *data;
}
*out = '\0';
return 0;
}
static struct ast_custom_function escape_function = {
.name = "SQL_ESC",
.read = acf_escape,
.write = NULL,
};
static int acf_fetch(struct ast_channel *chan, const char *cmd, char *data, char *buf, size_t len)
{
struct ast_datastore *store;
struct odbc_datastore *resultset;
struct odbc_datastore_row *row;
store = ast_channel_datastore_find(chan, &odbc_info, data);
if (!store) {
pbx_builtin_setvar_helper(chan, "ODBC_FETCH_STATUS", "FAILURE");
return -1;
}
resultset = store->data;
AST_LIST_LOCK(resultset);
row = AST_LIST_REMOVE_HEAD(resultset, list);
AST_LIST_UNLOCK(resultset);
if (!row) {
/* Cleanup datastore */
ast_channel_datastore_remove(chan, store);
ast_datastore_free(store);
pbx_builtin_setvar_helper(chan, "ODBC_FETCH_STATUS", "FAILURE");
return -1;
}
pbx_builtin_setvar_helper(chan, "~ODBCFIELDS~", resultset->names);
ast_copy_string(buf, row->data, len);
ast_free(row);
pbx_builtin_setvar_helper(chan, "ODBC_FETCH_STATUS", "SUCCESS");
return 0;
}
static struct ast_custom_function fetch_function = {
.name = "ODBC_FETCH",
.read = acf_fetch,
.write = NULL,
};
static char *app_odbcfinish = "ODBCFinish";
static int exec_odbcfinish(struct ast_channel *chan, const char *data)
{
struct ast_datastore *store = ast_channel_datastore_find(chan, &odbc_info, data);
if (!store) /* Already freed; no big deal. */
return 0;
ast_channel_datastore_remove(chan, store);
ast_datastore_free(store);
return 0;
}
static int init_acf_query(struct ast_config *cfg, char *catg, struct acf_odbc_query **query)
{
const char *tmp;
int i;
if (!cfg || !catg) {
return EINVAL;
}
*query = ast_calloc(1, sizeof(struct acf_odbc_query));
if (! (*query))
return ENOMEM;
if (((tmp = ast_variable_retrieve(cfg, catg, "writehandle"))) || ((tmp = ast_variable_retrieve(cfg, catg, "dsn")))) {
char *tmp2 = ast_strdupa(tmp);
AST_DECLARE_APP_ARGS(writeconf,
AST_APP_ARG(dsn)[5];
);
AST_STANDARD_APP_ARGS(writeconf, tmp2);
for (i = 0; i < 5; i++) {
if (!ast_strlen_zero(writeconf.dsn[i]))
ast_copy_string((*query)->writehandle[i], writeconf.dsn[i], sizeof((*query)->writehandle[i]));
}
}
if ((tmp = ast_variable_retrieve(cfg, catg, "readhandle"))) {
char *tmp2 = ast_strdupa(tmp);
AST_DECLARE_APP_ARGS(readconf,
AST_APP_ARG(dsn)[5];
);
AST_STANDARD_APP_ARGS(readconf, tmp2);
for (i = 0; i < 5; i++) {
if (!ast_strlen_zero(readconf.dsn[i]))
ast_copy_string((*query)->readhandle[i], readconf.dsn[i], sizeof((*query)->readhandle[i]));
}
} else {
/* If no separate readhandle, then use the writehandle for reading */
for (i = 0; i < 5; i++) {
if (!ast_strlen_zero((*query)->writehandle[i]))
ast_copy_string((*query)->readhandle[i], (*query)->writehandle[i], sizeof((*query)->readhandle[i]));
}
}
if ((tmp = ast_variable_retrieve(cfg, catg, "readsql")))
ast_copy_string((*query)->sql_read, tmp, sizeof((*query)->sql_read));
else if ((tmp = ast_variable_retrieve(cfg, catg, "read"))) {
ast_log(LOG_WARNING, "Parameter 'read' is deprecated for category %s. Please use 'readsql' instead.\n", catg);
ast_copy_string((*query)->sql_read, tmp, sizeof((*query)->sql_read));
}
if (!ast_strlen_zero((*query)->sql_read) && ast_strlen_zero((*query)->readhandle[0])) {
ast_free(*query);
*query = NULL;
ast_log(LOG_ERROR, "There is SQL, but no ODBC class to be used for reading: %s\n", catg);
return EINVAL;
}
if ((tmp = ast_variable_retrieve(cfg, catg, "writesql")))
ast_copy_string((*query)->sql_write, tmp, sizeof((*query)->sql_write));
else if ((tmp = ast_variable_retrieve(cfg, catg, "write"))) {
ast_log(LOG_WARNING, "Parameter 'write' is deprecated for category %s. Please use 'writesql' instead.\n", catg);
ast_copy_string((*query)->sql_write, tmp, sizeof((*query)->sql_write));
}
if (!ast_strlen_zero((*query)->sql_write) && ast_strlen_zero((*query)->writehandle[0])) {
ast_free(*query);
*query = NULL;
ast_log(LOG_ERROR, "There is SQL, but no ODBC class to be used for writing: %s\n", catg);
return EINVAL;
}
if ((tmp = ast_variable_retrieve(cfg, catg, "insertsql"))) {
ast_copy_string((*query)->sql_insert, tmp, sizeof((*query)->sql_insert));
}
/* Allow escaping of embedded commas in fields to be turned off */
ast_set_flag((*query), OPT_ESCAPECOMMAS);
if ((tmp = ast_variable_retrieve(cfg, catg, "escapecommas"))) {
if (ast_false(tmp))
ast_clear_flag((*query), OPT_ESCAPECOMMAS);
}
if ((tmp = ast_variable_retrieve(cfg, catg, "mode"))) {
if (strcasecmp(tmp, "multirow") == 0)
ast_set_flag((*query), OPT_MULTIROW);
if ((tmp = ast_variable_retrieve(cfg, catg, "rowlimit")))
sscanf(tmp, "%30d", &((*query)->rowlimit));
}
(*query)->acf = ast_calloc(1, sizeof(struct ast_custom_function));
if (! (*query)->acf) {
ast_free(*query);
*query = NULL;
return ENOMEM;
}
if (ast_string_field_init((*query)->acf, 128)) {
ast_free((*query)->acf);
ast_free(*query);
*query = NULL;
return ENOMEM;
}
if ((tmp = ast_variable_retrieve(cfg, catg, "prefix")) && !ast_strlen_zero(tmp)) {
if (asprintf((char **)&((*query)->acf->name), "%s_%s", tmp, catg) < 0) {
ast_log(LOG_WARNING, "asprintf() failed: %s\n", strerror(errno));
}
} else {
if (asprintf((char **)&((*query)->acf->name), "ODBC_%s", catg) < 0) {
ast_log(LOG_WARNING, "asprintf() failed: %s\n", strerror(errno));
}
}
if (!((*query)->acf->name)) {
ast_string_field_free_memory((*query)->acf);
ast_free((*query)->acf);
ast_free(*query);
*query = NULL;
return ENOMEM;
}
if ((tmp = ast_variable_retrieve(cfg, catg, "syntax")) && !ast_strlen_zero(tmp)) {
ast_string_field_build((*query)->acf, syntax, "%s(%s)", (*query)->acf->name, tmp);
} else {
ast_string_field_build((*query)->acf, syntax, "%s(<arg1>[...[,<argN>]])", (*query)->acf->name);
}
if (ast_strlen_zero((*query)->acf->syntax)) {
ast_free((char *)(*query)->acf->name);
ast_string_field_free_memory((*query)->acf);
ast_free((*query)->acf);
ast_free(*query);
*query = NULL;
return ENOMEM;
}
if ((tmp = ast_variable_retrieve(cfg, catg, "synopsis")) && !ast_strlen_zero(tmp)) {
ast_string_field_set((*query)->acf, synopsis, tmp);
} else {
ast_string_field_set((*query)->acf, synopsis, "Runs the referenced query with the specified arguments");
}
if (ast_strlen_zero((*query)->acf->synopsis)) {
ast_free((char *)(*query)->acf->name);
ast_string_field_free_memory((*query)->acf);
ast_free((*query)->acf);
ast_free(*query);
*query = NULL;
return ENOMEM;
}
if (!ast_strlen_zero((*query)->sql_read) && !ast_strlen_zero((*query)->sql_write)) {
ast_string_field_build((*query)->acf, desc,
"Runs the following query, as defined in func_odbc.conf, performing\n"
"substitution of the arguments into the query as specified by ${ARG1},\n"
"${ARG2}, ... ${ARGn}. When setting the function, the values are provided\n"
"either in whole as ${VALUE} or parsed as ${VAL1}, ${VAL2}, ... ${VALn}.\n"
"%s"
"\nRead:\n%s\n\nWrite:\n%s\n%s%s%s",
ast_strlen_zero((*query)->sql_insert) ? "" :
"If the write query affects no rows, the insert query will be\n"
"performed.\n",
(*query)->sql_read,
(*query)->sql_write,
ast_strlen_zero((*query)->sql_insert) ? "" : "Insert:\n",
ast_strlen_zero((*query)->sql_insert) ? "" : (*query)->sql_insert,
ast_strlen_zero((*query)->sql_insert) ? "" : "\n");
} else if (!ast_strlen_zero((*query)->sql_read)) {
ast_string_field_build((*query)->acf, desc,
"Runs the following query, as defined in func_odbc.conf, performing\n"
"substitution of the arguments into the query as specified by ${ARG1},\n"
"${ARG2}, ... ${ARGn}. This function may only be read, not set.\n\nSQL:\n%s\n",
(*query)->sql_read);
} else if (!ast_strlen_zero((*query)->sql_write)) {
ast_string_field_build((*query)->acf, desc,
"Runs the following query, as defined in func_odbc.conf, performing\n"
"substitution of the arguments into the query as specified by ${ARG1},\n"
"${ARG2}, ... ${ARGn}. The values are provided either in whole as\n"
"${VALUE} or parsed as ${VAL1}, ${VAL2}, ... ${VALn}.\n"
"This function may only be set.\n%sSQL:\n%s\n%s%s%s",
ast_strlen_zero((*query)->sql_insert) ? "" :
"If the write query affects no rows, the insert query will be\n"
"performed.\n",
(*query)->sql_write,
ast_strlen_zero((*query)->sql_insert) ? "" : "Insert:\n",
ast_strlen_zero((*query)->sql_insert) ? "" : (*query)->sql_insert,
ast_strlen_zero((*query)->sql_insert) ? "" : "\n");
} else {
ast_string_field_free_memory((*query)->acf);
ast_free((char *)(*query)->acf->name);
ast_free((*query)->acf);
ast_free(*query);
ast_log(LOG_WARNING, "Section '%s' was found, but there was no SQL to execute. Ignoring.\n", catg);
return EINVAL;
}
if (ast_strlen_zero((*query)->acf->desc)) {
ast_string_field_free_memory((*query)->acf);
ast_free((char *)(*query)->acf->name);
ast_free((*query)->acf);
ast_free(*query);
*query = NULL;
return ENOMEM;
}
if (ast_strlen_zero((*query)->sql_read)) {
(*query)->acf->read = NULL;
} else {
(*query)->acf->read = acf_odbc_read;
}
if (ast_strlen_zero((*query)->sql_write)) {
(*query)->acf->write = NULL;
} else {
(*query)->acf->write = acf_odbc_write;
}
return 0;
}
static int free_acf_query(struct acf_odbc_query *query)
{
if (query) {
if (query->acf) {
if (query->acf->name)
ast_free((char *)query->acf->name);
ast_string_field_free_memory(query->acf);
ast_free(query->acf);
}
ast_free(query);
}
return 0;
}
static char *cli_odbc_read(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
AST_DECLARE_APP_ARGS(args,
AST_APP_ARG(field)[100];
);
struct ast_str *sql;
char *char_args, varname[10];
struct acf_odbc_query *query;
struct ast_channel *chan;
int i;
switch (cmd) {
case CLI_INIT:
e->command = "odbc read";
e->usage =
"Usage: odbc read <name> <args> [exec]\n"
" Evaluates the SQL provided in the ODBC function <name>, and\n"
" optionally executes the function. This function is intended for\n"
" testing purposes. Remember to quote arguments containing spaces.\n";
return NULL;
case CLI_GENERATE:
if (a->pos == 2) {
int wordlen = strlen(a->word), which = 0;
/* Complete function name */
AST_RWLIST_RDLOCK(&queries);
AST_RWLIST_TRAVERSE(&queries, query, list) {
if (!strncasecmp(query->acf->name, a->word, wordlen)) {
if (++which > a->n) {
char *res = ast_strdup(query->acf->name);
AST_RWLIST_UNLOCK(&queries);
return res;
}
}
}
AST_RWLIST_UNLOCK(&queries);
return NULL;
} else if (a->pos == 4) {
return a->n == 0 ? ast_strdup("exec") : NULL;
} else {
return NULL;
}
}
if (a->argc < 4 || a->argc > 5) {
return CLI_SHOWUSAGE;
}
sql = ast_str_thread_get(&sql_buf, 16);
if (!sql) {
return CLI_FAILURE;
}
AST_RWLIST_RDLOCK(&queries);
AST_RWLIST_TRAVERSE(&queries, query, list) {
if (!strcmp(query->acf->name, a->argv[2])) {
break;
}
}
if (!query) {
ast_cli(a->fd, "No such query '%s'\n", a->argv[2]);
AST_RWLIST_UNLOCK(&queries);
return CLI_SHOWUSAGE;
}
if (ast_strlen_zero(query->sql_read)) {
ast_cli(a->fd, "The function %s has no writesql parameter.\n", a->argv[2]);
AST_RWLIST_UNLOCK(&queries);
return CLI_SUCCESS;
}
ast_str_make_space(&sql, strlen(query->sql_read) * 2 + 300);
/* Evaluate function */
char_args = ast_strdupa(a->argv[3]);
chan = ast_dummy_channel_alloc();
AST_STANDARD_APP_ARGS(args, char_args);
for (i = 0; i < args.argc; i++) {
snprintf(varname, sizeof(varname), "ARG%d", i + 1);
pbx_builtin_pushvar_helper(chan, varname, args.field[i]);
}
ast_str_substitute_variables(&sql, 0, chan, query->sql_read);
chan = ast_channel_release(chan);
if (a->argc == 5 && !strcmp(a->argv[4], "exec")) {
/* Execute the query */
struct odbc_obj *obj = NULL;
int dsn, executed = 0;
SQLHSTMT stmt;
int rows = 0, res, x;
SQLSMALLINT colcount = 0, collength;
SQLLEN indicator;
struct ast_str *coldata = ast_str_thread_get(&coldata_buf, 16);
char colname[256];
SQLULEN maxcol;
if (!coldata) {
AST_RWLIST_UNLOCK(&queries);
return CLI_SUCCESS;
}
for (dsn = 0; dsn < 5; dsn++) {
if (ast_strlen_zero(query->readhandle[dsn])) {
continue;
}
ast_debug(1, "Found handle %s\n", query->readhandle[dsn]);
if (!(obj = ast_odbc_request_obj(query->readhandle[dsn], 0))) {
continue;
}
ast_debug(1, "Got obj\n");
if (!(stmt = ast_odbc_direct_execute(obj, generic_execute, ast_str_buffer(sql)))) {
ast_odbc_release_obj(obj);
obj = NULL;
continue;
}
executed = 1;
res = SQLNumResultCols(stmt, &colcount);
if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
ast_cli(a->fd, "SQL Column Count error!\n[%s]\n\n", ast_str_buffer(sql));
SQLCloseCursor(stmt);
SQLFreeHandle (SQL_HANDLE_STMT, stmt);
ast_odbc_release_obj(obj);
obj = NULL;
AST_RWLIST_UNLOCK(&queries);
return CLI_SUCCESS;
}
res = SQLFetch(stmt);
if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
SQLCloseCursor(stmt);
SQLFreeHandle(SQL_HANDLE_STMT, stmt);
ast_odbc_release_obj(obj);
obj = NULL;
if (res == SQL_NO_DATA) {
ast_cli(a->fd, "Returned %d rows. Query executed on handle %d:%s [%s]\n", rows, dsn, query->readhandle[dsn], ast_str_buffer(sql));
break;
} else {
ast_cli(a->fd, "Error %d in FETCH [%s]\n", res, ast_str_buffer(sql));
}
AST_RWLIST_UNLOCK(&queries);
return CLI_SUCCESS;
}
for (;;) {
for (x = 0; x < colcount; x++) {
res = SQLDescribeCol(stmt, x + 1, (unsigned char *)colname, sizeof(colname), &collength, NULL, &maxcol, NULL, NULL);
if (((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) || collength == 0) {
snprintf(colname, sizeof(colname), "field%d", x);
}
res = ast_odbc_ast_str_SQLGetData(&coldata, maxcol, stmt, x + 1, SQL_CHAR, &indicator);
if (indicator == SQL_NULL_DATA) {
ast_str_set(&coldata, 0, "(nil)");
res = SQL_SUCCESS;
}
if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
ast_cli(a->fd, "SQL Get Data error %d!\n[%s]\n\n", res, ast_str_buffer(sql));
SQLCloseCursor(stmt);
SQLFreeHandle(SQL_HANDLE_STMT, stmt);
ast_odbc_release_obj(obj);
obj = NULL;
AST_RWLIST_UNLOCK(&queries);
return CLI_SUCCESS;
}
ast_cli(a->fd, "%-20.20s %s\n", colname, ast_str_buffer(coldata));
}
rows++;
/* Get next row */
res = SQLFetch(stmt);
if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
break;
}
ast_cli(a->fd, "%-20.20s %s\n", "----------", "----------");
}
SQLCloseCursor(stmt);
SQLFreeHandle(SQL_HANDLE_STMT, stmt);
ast_odbc_release_obj(obj);
obj = NULL;
ast_cli(a->fd, "Returned %d row%s. Query executed on handle %d [%s]\n", rows, rows == 1 ? "" : "s", dsn, query->readhandle[dsn]);
break;
}
if (obj) {
ast_odbc_release_obj(obj);
obj = NULL;
}
if (!executed) {
ast_cli(a->fd, "Failed to execute query. [%s]\n", ast_str_buffer(sql));
}
} else { /* No execution, just print out the resulting SQL */
ast_cli(a->fd, "%s\n", ast_str_buffer(sql));
}
AST_RWLIST_UNLOCK(&queries);
return CLI_SUCCESS;
}
static char *cli_odbc_write(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
AST_DECLARE_APP_ARGS(values,
AST_APP_ARG(field)[100];
);
AST_DECLARE_APP_ARGS(args,
AST_APP_ARG(field)[100];
);
struct ast_str *sql;
char *char_args, *char_values, varname[10];
struct acf_odbc_query *query;
struct ast_channel *chan;
int i;
switch (cmd) {
case CLI_INIT:
e->command = "odbc write";
e->usage =
"Usage: odbc write <name> <args> <value> [exec]\n"
" Evaluates the SQL provided in the ODBC function <name>, and\n"
" optionally executes the function. This function is intended for\n"
" testing purposes. Remember to quote arguments containing spaces.\n";
return NULL;
case CLI_GENERATE:
if (a->pos == 2) {
int wordlen = strlen(a->word), which = 0;
/* Complete function name */
AST_RWLIST_RDLOCK(&queries);
AST_RWLIST_TRAVERSE(&queries, query, list) {
if (!strncasecmp(query->acf->name, a->word, wordlen)) {
if (++which > a->n) {
char *res = ast_strdup(query->acf->name);
AST_RWLIST_UNLOCK(&queries);
return res;
}
}
}
AST_RWLIST_UNLOCK(&queries);
return NULL;
} else if (a->pos == 5) {
return a->n == 0 ? ast_strdup("exec") : NULL;
} else {
return NULL;
}
}
if (a->argc < 5 || a->argc > 6) {
return CLI_SHOWUSAGE;
}
sql = ast_str_thread_get(&sql_buf, 16);
if (!sql) {
return CLI_FAILURE;
}
AST_RWLIST_RDLOCK(&queries);
AST_RWLIST_TRAVERSE(&queries, query, list) {
if (!strcmp(query->acf->name, a->argv[2])) {
break;
}
}
if (!query) {
ast_cli(a->fd, "No such query '%s'\n", a->argv[2]);
AST_RWLIST_UNLOCK(&queries);
return CLI_SHOWUSAGE;
}
if (ast_strlen_zero(query->sql_write)) {
ast_cli(a->fd, "The function %s has no writesql parameter.\n", a->argv[2]);
AST_RWLIST_UNLOCK(&queries);
return CLI_SUCCESS;
}
ast_str_make_space(&sql, strlen(query->sql_write) * 2 + 300);
/* Evaluate function */
char_args = ast_strdupa(a->argv[3]);
char_values = ast_strdupa(a->argv[4]);
chan = ast_dummy_channel_alloc();
AST_STANDARD_APP_ARGS(args, char_args);
for (i = 0; i < args.argc; i++) {
snprintf(varname, sizeof(varname), "ARG%d", i + 1);
pbx_builtin_pushvar_helper(chan, varname, args.field[i]);
}
/* Parse values, just like arguments */
AST_STANDARD_APP_ARGS(values, char_values);
for (i = 0; i < values.argc; i++) {
snprintf(varname, sizeof(varname), "VAL%d", i + 1);
pbx_builtin_pushvar_helper(chan, varname, values.field[i]);
}
/* Additionally set the value as a whole (but push an empty string if value is NULL) */
pbx_builtin_pushvar_helper(chan, "VALUE", S_OR(a->argv[4], ""));
ast_str_substitute_variables(&sql, 0, chan, query->sql_write);
ast_debug(1, "SQL is %s\n", ast_str_buffer(sql));
chan = ast_channel_release(chan);
if (a->argc == 6 && !strcmp(a->argv[5], "exec")) {
/* Execute the query */
struct odbc_obj *obj = NULL;
int dsn, executed = 0;
SQLHSTMT stmt;
SQLLEN rows = -1;
for (dsn = 0; dsn < 5; dsn++) {
if (ast_strlen_zero(query->writehandle[dsn])) {
continue;
}
if (!(obj = ast_odbc_request_obj(query->writehandle[dsn], 0))) {
continue;
}
if (!(stmt = ast_odbc_direct_execute(obj, generic_execute, ast_str_buffer(sql)))) {
ast_odbc_release_obj(obj);
obj = NULL;
continue;
}
SQLRowCount(stmt, &rows);
SQLCloseCursor(stmt);
SQLFreeHandle(SQL_HANDLE_STMT, stmt);
ast_odbc_release_obj(obj);
obj = NULL;
ast_cli(a->fd, "Affected %d rows. Query executed on handle %d [%s]\n", (int)rows, dsn, query->writehandle[dsn]);
executed = 1;
break;
}
if (!executed) {
ast_cli(a->fd, "Failed to execute query.\n");
}
} else { /* No execution, just print out the resulting SQL */
ast_cli(a->fd, "%s\n", ast_str_buffer(sql));
}
AST_RWLIST_UNLOCK(&queries);
return CLI_SUCCESS;
}
static struct ast_cli_entry cli_func_odbc[] = {
AST_CLI_DEFINE(cli_odbc_write, "Test setting a func_odbc function"),
AST_CLI_DEFINE(cli_odbc_read, "Test reading a func_odbc function"),
};
static int load_module(void)
{
int res = 0;
struct ast_config *cfg;
char *catg;
struct ast_flags config_flags = { 0 };
res |= ast_custom_function_register(&fetch_function);
res |= ast_register_application_xml(app_odbcfinish, exec_odbcfinish);
AST_RWLIST_WRLOCK(&queries);
cfg = ast_config_load(config, config_flags);
if (!cfg || cfg == CONFIG_STATUS_FILEINVALID) {
ast_log(LOG_NOTICE, "Unable to load config for func_odbc: %s\n", config);
AST_RWLIST_UNLOCK(&queries);
return AST_MODULE_LOAD_DECLINE;
}
for (catg = ast_category_browse(cfg, NULL);
catg;
catg = ast_category_browse(cfg, catg)) {
struct acf_odbc_query *query = NULL;
int err;
if ((err = init_acf_query(cfg, catg, &query))) {
if (err == ENOMEM)
ast_log(LOG_ERROR, "Out of memory\n");
else if (err == EINVAL)
ast_log(LOG_ERROR, "Invalid parameters for category %s\n", catg);
else
ast_log(LOG_ERROR, "%s (%d)\n", strerror(err), err);
} else {
AST_RWLIST_INSERT_HEAD(&queries, query, list);
ast_custom_function_register(query->acf);
}
}
ast_config_destroy(cfg);
res |= ast_custom_function_register(&escape_function);
ast_cli_register_multiple(cli_func_odbc, ARRAY_LEN(cli_func_odbc));
AST_RWLIST_UNLOCK(&queries);
return res;
}
static int unload_module(void)
{
struct acf_odbc_query *query;
int res = 0;
AST_RWLIST_WRLOCK(&queries);
while (!AST_RWLIST_EMPTY(&queries)) {
query = AST_RWLIST_REMOVE_HEAD(&queries, list);
ast_custom_function_unregister(query->acf);
free_acf_query(query);
}
res |= ast_custom_function_unregister(&escape_function);
res |= ast_custom_function_unregister(&fetch_function);
res |= ast_unregister_application(app_odbcfinish);
ast_cli_unregister_multiple(cli_func_odbc, ARRAY_LEN(cli_func_odbc));
/* Allow any threads waiting for this lock to pass (avoids a race) */
AST_RWLIST_UNLOCK(&queries);
usleep(1);
AST_RWLIST_WRLOCK(&queries);
AST_RWLIST_UNLOCK(&queries);
return 0;
}
static int reload(void)
{
int res = 0;
struct ast_config *cfg;
struct acf_odbc_query *oldquery;
char *catg;
struct ast_flags config_flags = { CONFIG_FLAG_FILEUNCHANGED };
cfg = ast_config_load(config, config_flags);
if (cfg == CONFIG_STATUS_FILEUNCHANGED || cfg == CONFIG_STATUS_FILEINVALID)
return 0;
AST_RWLIST_WRLOCK(&queries);
while (!AST_RWLIST_EMPTY(&queries)) {
oldquery = AST_RWLIST_REMOVE_HEAD(&queries, list);
ast_custom_function_unregister(oldquery->acf);
free_acf_query(oldquery);
}
if (!cfg) {
ast_log(LOG_WARNING, "Unable to load config for func_odbc: %s\n", config);
goto reload_out;
}
for (catg = ast_category_browse(cfg, NULL);
catg;
catg = ast_category_browse(cfg, catg)) {
struct acf_odbc_query *query = NULL;
if (init_acf_query(cfg, catg, &query)) {
ast_log(LOG_ERROR, "Cannot initialize query %s\n", catg);
} else {
AST_RWLIST_INSERT_HEAD(&queries, query, list);
ast_custom_function_register(query->acf);
}
}
ast_config_destroy(cfg);
reload_out:
AST_RWLIST_UNLOCK(&queries);
return res;
}
/* XXX need to revise usecount - set if query_lock is set */
AST_MODULE_INFO(ASTERISK_GPL_KEY, AST_MODFLAG_DEFAULT, "ODBC lookups",
.load = load_module,
.unload = unload_module,
.reload = reload,
);
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