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Bug 5055 - Simple SQL commands from the dialplan
git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@7576 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Tilghman Lesher
637
funcs/func_odbc.c
Normal file
637
funcs/func_odbc.c
Normal file
@@ -0,0 +1,637 @@
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/*
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* Asterisk -- A telephony toolkit for Linux.
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*
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* func_odbc
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*
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* Copyright (c) 2005 Tilghman Lesher
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*
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* Tilghman Lesher <func_odbc__200508@the-tilghman.com>
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*
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* Special thanks to Anthony Minessale II for debugging help.
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*/
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#include <sys/types.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <asterisk/file.h>
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#include <asterisk/logger.h>
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#include <asterisk/options.h>
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#include <asterisk/channel.h>
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#include <asterisk/pbx.h>
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#include <asterisk/module.h>
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#include <asterisk/config.h>
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#include <asterisk/res_odbc.h>
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static char *tdesc = "ODBC lookups";
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static char *config = "func_odbc.conf";
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struct acf_odbc_query {
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char name[30];
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char dsn[30];
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char sql_read[512];
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char sql_write[512];
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struct ast_custom_function *acf;
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unsigned int deleteme:1;
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struct acf_odbc_query *next;
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};
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static struct acf_odbc_query *queries = NULL;
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AST_MUTEX_DEFINE_STATIC(query_lock);
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#ifdef NEEDTRACE
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static void acf_odbc_error(SQLHSTMT stmt, int res)
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{
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char state[10] = "", diagnostic[256] = "";
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SQLINTEGER nativeerror = 0;
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SQLSMALLINT diagbytes = 0;
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SQLGetDiagRec(SQL_HANDLE_STMT, stmt, 1, state, &nativeerror, diagnostic, sizeof(diagnostic), &diagbytes);
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ast_log(LOG_WARNING, "SQL return value %d: error %s: %s (len %d)\n", res, state, diagnostic, diagbytes);
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}
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#endif
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/*
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* Master control routine
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*/
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static void acf_odbc_write(struct ast_channel *chan, char *cmd, char *data, const char *value)
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{
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odbc_obj *obj;
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struct acf_odbc_query *query;
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char *s, *t, *arg, buf[512]="", varname[15];
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int res, argcount=0, valcount=0, i, retry=0;
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struct ast_channel *ast;
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SQLHSTMT stmt;
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SQLINTEGER nativeerror=0, numfields=0, rows=0;
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SQLSMALLINT diagbytes=0;
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unsigned char state[10], diagnostic[256];
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#ifdef NEEDTRACE
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SQLINTEGER enable = 1;
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char *tracefile = "/tmp/odbc.trace";
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#endif
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ast_mutex_lock(&query_lock);
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for (query=queries; query; query = query->next) {
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if (!strcasecmp(query->name, cmd + 5)) {
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break;
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}
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}
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if (!query) {
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ast_log(LOG_ERROR, "No such function '%s'\n", cmd);
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ast_mutex_unlock(&query_lock);
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return;
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}
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obj = fetch_odbc_obj(query->dsn, 0);
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if (!obj) {
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ast_log(LOG_ERROR, "No such DSN registered: %s (check res_odbc.conf)\n", query->dsn);
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ast_mutex_unlock(&query_lock);
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return;
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}
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/* Parse our arguments */
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s = ast_strdupa(data);
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if (value) {
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t = ast_strdupa(value);
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} else {
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t = "";
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}
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if (!s || !t) {
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ast_log(LOG_ERROR, "Out of memory\n");
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ast_mutex_unlock(&query_lock);
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return;
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}
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/* XXX You might be tempted to change this section into using
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* pbx_builtin_pushvar_helper(). However, note that if you try
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* to set a NULL (like for VALUE), then nothing gets set, and the
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* value doesn't get masked out. Even worse, when you subsequently
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* try to remove the value you just set, you'll wind up unsetting
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* the previous value (which is wholly undesireable). Hence, this
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* has to remain the way it is done here. XXX
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*/
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/* Save old arguments as variables in a fake channel */
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ast = ast_channel_alloc(0);
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while ((arg = strsep(&s, "|"))) {
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argcount++;
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snprintf(varname, sizeof(varname), "ARG%d", argcount);
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pbx_builtin_setvar_helper(ast, varname, pbx_builtin_getvar_helper(chan, varname));
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pbx_builtin_setvar_helper(chan, varname, arg);
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}
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/* Parse values, just like arguments */
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while ((arg = strsep(&t, "|"))) {
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valcount++;
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snprintf(varname, sizeof(varname), "VAL%d", valcount);
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pbx_builtin_setvar_helper(ast, varname, pbx_builtin_getvar_helper(chan, varname));
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pbx_builtin_setvar_helper(chan, varname, arg);
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}
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/* Additionally set the value as a whole */
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/* Note that pbx_builtin_setvar_helper will quite happily take a NULL for the 3rd argument */
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pbx_builtin_setvar_helper(ast, "VALUE", pbx_builtin_getvar_helper(chan, "VALUE"));
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pbx_builtin_setvar_helper(chan, "VALUE", value);
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pbx_substitute_variables_helper(chan, query->sql_write, buf, sizeof(buf) - 1);
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/* Restore prior values */
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for (i=1; i<=argcount; i++) {
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snprintf(varname, sizeof(varname), "ARG%d", argcount);
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pbx_builtin_setvar_helper(chan, varname, pbx_builtin_getvar_helper(ast, varname));
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}
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for (i=1; i<=valcount; i++) {
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snprintf(varname, sizeof(varname), "VAL%d", argcount);
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pbx_builtin_setvar_helper(chan, varname, pbx_builtin_getvar_helper(ast, varname));
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}
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pbx_builtin_setvar_helper(chan, "VALUE", pbx_builtin_getvar_helper(ast, "VALUE"));
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ast_channel_free(ast);
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ast_mutex_unlock(&query_lock);
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retry_write:
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#ifdef NEEDTRACE
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SQLSetConnectAttr(obj->con, SQL_ATTR_TRACE, &enable, SQL_IS_INTEGER);
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SQLSetConnectAttr(obj->con, SQL_ATTR_TRACEFILE, tracefile, strlen(tracefile));
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#endif
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res = SQLAllocHandle (SQL_HANDLE_STMT, obj->con, &stmt);
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if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
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ast_log(LOG_WARNING, "SQL Alloc Handle failed!\n");
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pbx_builtin_setvar_helper(chan, "ODBCROWS", "-1");
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return;
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}
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res = SQLPrepare(stmt, (unsigned char *)buf, SQL_NTS);
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if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
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ast_log(LOG_WARNING, "SQL Prepare failed![%s]\n", buf);
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SQLFreeHandle (SQL_HANDLE_STMT, stmt);
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pbx_builtin_setvar_helper(chan, "ODBCROWS", "-1");
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return;
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}
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res = SQLExecute(stmt);
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if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
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if (res == SQL_ERROR) {
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SQLGetDiagField(SQL_HANDLE_STMT, stmt, 1, SQL_DIAG_NUMBER, &numfields, SQL_IS_INTEGER, &diagbytes);
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for (i = 0; i <= numfields; i++) {
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SQLGetDiagRec(SQL_HANDLE_STMT, stmt, i + 1, state, &nativeerror, diagnostic, sizeof(diagnostic), &diagbytes);
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ast_log(LOG_WARNING, "SQL Execute returned an error %d: %s: %s (%d)\n", res, state, diagnostic, diagbytes);
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if (i > 10) {
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ast_log(LOG_WARNING, "Oh, that was good. There are really %d diagnostics?\n", (int)numfields);
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break;
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}
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}
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}
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SQLFreeHandle(SQL_HANDLE_STMT, stmt);
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odbc_obj_disconnect(obj);
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/* All handles are now invalid (after a disconnect), so we gotta redo all handles */
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odbc_obj_connect(obj);
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if (!retry) {
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retry = 1;
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goto retry_write;
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}
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rows = -1;
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} else {
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/* Rows affected */
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SQLRowCount(stmt, &rows);
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}
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/* Output the affected rows, for all cases. In the event of failure, we
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* flag this as -1 rows. Note that this is different from 0 affected rows
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* which would be the case if we succeeded in our query, but the values did
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* not change. */
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snprintf(varname, sizeof(varname), "%d", (int)rows);
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pbx_builtin_setvar_helper(chan, "ODBCROWS", varname);
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if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
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ast_log(LOG_WARNING, "SQL Execute error!\n[%s]\n\n", buf);
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}
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SQLFreeHandle(SQL_HANDLE_STMT, stmt);
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}
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static char *acf_odbc_read(struct ast_channel *chan, char *cmd, char *data, char *buf, size_t len)
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{
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odbc_obj *obj;
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struct acf_odbc_query *query;
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char *s, *arg, sql[512] = "", varname[15];
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int count=0, res, x;
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SQLHSTMT stmt;
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SQLSMALLINT colcount=0;
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SQLINTEGER indicator;
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#ifdef NEEDTRACE
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SQLINTEGER enable = 1;
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char *tracefile = "/tmp/odbc.trace";
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#endif
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ast_mutex_lock(&query_lock);
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for (query=queries; query; query = query->next) {
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if (!strcasecmp(query->name, cmd + 5)) {
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break;
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}
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}
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if (!query) {
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ast_log(LOG_ERROR, "No such function '%s'\n", cmd);
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ast_mutex_unlock(&query_lock);
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return "";
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}
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obj = fetch_odbc_obj(query->dsn, 0);
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if (!obj) {
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ast_log(LOG_ERROR, "No such DSN registered: %s (check res_odbc.conf)\n", query->dsn);
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ast_mutex_unlock(&query_lock);
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return "";
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}
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#ifdef NEEDTRACE
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SQLSetConnectAttr(obj->con, SQL_ATTR_TRACE, &enable, SQL_IS_INTEGER);
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SQLSetConnectAttr(obj->con, SQL_ATTR_TRACEFILE, tracefile, strlen(tracefile));
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#endif
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/* Parse our arguments */
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s = ast_strdupa(data);
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if (!s) {
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ast_log(LOG_ERROR, "Out of memory\n");
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ast_mutex_unlock(&query_lock);
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return "";
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}
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while ((arg = strsep(&s, "|"))) {
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count++;
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snprintf(varname, sizeof(varname), "ARG%d", count);
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/* arg is by definition non-NULL, so this works, here */
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pbx_builtin_pushvar_helper(chan, varname, arg);
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}
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pbx_substitute_variables_helper(chan, query->sql_read, sql, sizeof(sql) - 1);
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/* Restore prior values */
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for (x = 1; x <= count; x++) {
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snprintf(varname, sizeof(varname), "ARG%d", x);
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pbx_builtin_setvar_helper(chan, varname, NULL);
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}
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ast_mutex_unlock(&query_lock);
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res = SQLAllocHandle (SQL_HANDLE_STMT, obj->con, &stmt);
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if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
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ast_log(LOG_WARNING, "SQL Alloc Handle failed!\n");
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return "";
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}
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res = SQLPrepare(stmt, (unsigned char *)sql, SQL_NTS);
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if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
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ast_log(LOG_WARNING, "SQL Prepare failed![%s]\n", sql);
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SQLFreeHandle (SQL_HANDLE_STMT, stmt);
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return "";
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}
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res = odbc_smart_execute(obj, stmt);
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if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
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ast_log(LOG_WARNING, "SQL Execute error!\n[%s]\n\n", sql);
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SQLFreeHandle (SQL_HANDLE_STMT, stmt);
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return "";
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}
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res = SQLNumResultCols(stmt, &colcount);
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if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
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ast_log(LOG_WARNING, "SQL Column Count error!\n[%s]\n\n", sql);
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SQLFreeHandle (SQL_HANDLE_STMT, stmt);
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return "";
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}
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memset(buf, 0, len);
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res = SQLFetch(stmt);
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if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
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if (res == SQL_NO_DATA) {
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if (option_verbose > 3) {
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ast_verbose(VERBOSE_PREFIX_4 "Found no rows [%s]\n", sql);
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}
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} else if (option_verbose > 3) {
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ast_log(LOG_WARNING, "Error %d in FETCH [%s]\n", res, sql);
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}
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goto acf_out;
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}
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for (x=0; x<colcount; x++) {
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int buflen, coldatalen;
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char coldata[256];
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buflen = strlen(buf);
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res = SQLGetData(stmt, x + 1, SQL_CHAR, coldata, sizeof(coldata), &indicator);
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if (indicator == SQL_NULL_DATA) {
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coldata[0] = '\0';
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res = SQL_SUCCESS;
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}
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if ((res != SQL_SUCCESS) && (res != SQL_SUCCESS_WITH_INFO)) {
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ast_log(LOG_WARNING, "SQL Get Data error!\n[%s]\n\n", sql);
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SQLFreeHandle(SQL_HANDLE_STMT, stmt);
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return "";
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}
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strncat(buf + buflen, coldata, len - buflen);
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coldatalen = strlen(coldata);
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strncat(buf + buflen + coldatalen, ",", len - buflen - coldatalen);
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}
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/* Trim trailing comma */
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buf[strlen(buf) - 1] = '\0';
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||||
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acf_out:
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SQLFreeHandle(SQL_HANDLE_STMT, stmt);
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return buf;
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}
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static int init_acf_query(struct ast_config *cfg, char *catg, struct acf_odbc_query **query)
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{
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char *tmp;
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if (!cfg || !catg) {
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return -1;
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}
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||||
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*query = calloc(1, sizeof(struct acf_odbc_query));
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if (! (*query))
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return -1;
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||||
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||||
ast_copy_string((*query)->name, catg, sizeof((*query)->name));
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||||
|
||||
if ((tmp = ast_variable_retrieve(cfg, catg, "dsn"))) {
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ast_copy_string((*query)->dsn, tmp, sizeof((*query)->dsn));
|
||||
} else {
|
||||
return -1;
|
||||
}
|
||||
|
||||
if ((tmp = ast_variable_retrieve(cfg, catg, "read"))) {
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||||
ast_copy_string((*query)->sql_read, tmp, sizeof((*query)->sql_read));
|
||||
}
|
||||
|
||||
if ((tmp = ast_variable_retrieve(cfg, catg, "write"))) {
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||||
ast_copy_string((*query)->sql_write, tmp, sizeof((*query)->sql_write));
|
||||
}
|
||||
|
||||
(*query)->acf = calloc(1, sizeof(struct ast_custom_function));
|
||||
if ((*query)->acf) {
|
||||
asprintf(&((*query)->acf->name), "ODBC_%s", catg);
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||||
asprintf(&((*query)->acf->syntax), "ODBC_%s(<arg1>[...[,<argN>]])", catg);
|
||||
(*query)->acf->synopsis = "Runs the referenced query with the specified arguments";
|
||||
if (!ast_strlen_zero((*query)->sql_read) && !ast_strlen_zero((*query)->sql_write)) {
|
||||
asprintf(&((*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"
|
||||
"\nRead:\n%s\n\nWrite:\n%s\n",
|
||||
(*query)->sql_read,
|
||||
(*query)->sql_write);
|
||||
} else if (!ast_strlen_zero((*query)->sql_read)) {
|
||||
asprintf(&((*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)) {
|
||||
asprintf(&((*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.\nSQL:\n%s\n",
|
||||
(*query)->sql_write);
|
||||
}
|
||||
|
||||
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;
|
||||
}
|
||||
|
||||
if (! (*query)->acf->name || ! (*query)->acf->syntax || ! (*query)->acf->desc) {
|
||||
return -1;
|
||||
}
|
||||
} else {
|
||||
return -1;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int free_acf_query(struct acf_odbc_query *query)
|
||||
{
|
||||
if (query) {
|
||||
if (query->acf) {
|
||||
if (query->acf->name)
|
||||
free(query->acf->name);
|
||||
if (query->acf->syntax)
|
||||
free(query->acf->syntax);
|
||||
if (query->acf->desc)
|
||||
free(query->acf->desc);
|
||||
free(query->acf);
|
||||
}
|
||||
free(query);
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int odbc_load_module(void)
|
||||
{
|
||||
int res = 0;
|
||||
struct ast_config *cfg;
|
||||
char *catg;
|
||||
|
||||
ast_mutex_lock(&query_lock);
|
||||
|
||||
cfg = ast_config_load(config);
|
||||
if (!cfg) {
|
||||
ast_log(LOG_WARNING, "Unable to load config for func_odbc: %s\n", config);
|
||||
goto 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, "Out of memory\n");
|
||||
free_acf_query(query);
|
||||
} else {
|
||||
query->next = queries;
|
||||
queries = query;
|
||||
ast_custom_function_register(query->acf);
|
||||
}
|
||||
}
|
||||
|
||||
ast_config_destroy(cfg);
|
||||
out:
|
||||
ast_mutex_unlock(&query_lock);
|
||||
return res;
|
||||
}
|
||||
|
||||
static int odbc_unload_module(void)
|
||||
{
|
||||
struct acf_odbc_query *query, *lastquery = NULL;
|
||||
|
||||
ast_mutex_lock(&query_lock);
|
||||
for (query = queries; query; query = query->next) {
|
||||
if (lastquery)
|
||||
free_acf_query(lastquery);
|
||||
if (ast_custom_function_unregister(query->acf)) {
|
||||
ast_log(LOG_ERROR, "Cannot unregister function '%s'?\n", query->acf->name);
|
||||
/* Keep state valid */
|
||||
queries = query;
|
||||
ast_mutex_unlock(&query_lock);
|
||||
return -1;
|
||||
} else {
|
||||
/* If anything is waiting on this lock, this will let it pass (avoids a race) */
|
||||
ast_mutex_unlock(&query_lock);
|
||||
ast_mutex_lock(&query_lock);
|
||||
lastquery = query;
|
||||
}
|
||||
}
|
||||
if (lastquery)
|
||||
free(lastquery);
|
||||
queries = NULL;
|
||||
|
||||
ast_mutex_unlock(&query_lock);
|
||||
return 0;
|
||||
}
|
||||
|
||||
int reload(void)
|
||||
{
|
||||
int res = 0;
|
||||
struct ast_config *cfg;
|
||||
struct acf_odbc_query *q, *prevq = NULL, *qdel = NULL;
|
||||
char *catg;
|
||||
|
||||
ast_mutex_lock(&query_lock);
|
||||
|
||||
for (q = queries; q; q = q->next) {
|
||||
q->deleteme = 1;
|
||||
}
|
||||
|
||||
cfg = ast_config_load(config);
|
||||
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;
|
||||
|
||||
/* We do this piecemeal, so that we stay in a consistent state, if there's ever an error */
|
||||
for (q = queries, prevq=NULL; q; prevq=q, q = q->next) {
|
||||
if (!strcasecmp(catg, q->name)) {
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
if (init_acf_query(cfg, catg, &query)) {
|
||||
ast_log(LOG_ERROR, "Cannot initialize query ODBC_%s\n", catg);
|
||||
free_acf_query(query);
|
||||
} else {
|
||||
if (q) {
|
||||
/* Replacement */
|
||||
if (ast_custom_function_unregister(q->acf)) {
|
||||
ast_log(LOG_ERROR, "Cannot reload query %s\n", query->acf->name);
|
||||
free_acf_query(query);
|
||||
} else {
|
||||
ast_custom_function_register(query->acf);
|
||||
/* Add it to the list */
|
||||
if (prevq)
|
||||
prevq->next = query;
|
||||
else
|
||||
queries = query;
|
||||
query->next = q->next;
|
||||
/* Get rid of the old record */
|
||||
free_acf_query(q);
|
||||
}
|
||||
} else {
|
||||
/* New */
|
||||
query->next = queries;
|
||||
queries = query;
|
||||
ast_custom_function_register(query->acf);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/* Any remaining sets will now be destroyed */
|
||||
for (q = queries; q; q = q->next) {
|
||||
if (qdel) {
|
||||
free_acf_query(qdel);
|
||||
qdel = NULL;
|
||||
}
|
||||
|
||||
if (q->deleteme) {
|
||||
if (ast_custom_function_unregister(q->acf)) {
|
||||
ast_log(LOG_ERROR, "Cannot unregister function? Refusing to make 'ODBC_%s' go away.\n", q->name);
|
||||
} else {
|
||||
/* If anything is waiting on the lock to execute, this will dispose of it (without a race) */
|
||||
ast_mutex_unlock(&query_lock);
|
||||
ast_mutex_lock(&query_lock);
|
||||
|
||||
if (prevq) {
|
||||
prevq->next = q->next;
|
||||
} else {
|
||||
queries = q->next;
|
||||
}
|
||||
qdel = q;
|
||||
}
|
||||
} else {
|
||||
prevq = q;
|
||||
}
|
||||
}
|
||||
if (qdel)
|
||||
free_acf_query(qdel);
|
||||
|
||||
ast_config_destroy(cfg);
|
||||
reload_out:
|
||||
ast_mutex_unlock(&query_lock);
|
||||
return res;
|
||||
}
|
||||
|
||||
int unload_module(void)
|
||||
{
|
||||
return odbc_unload_module();
|
||||
}
|
||||
|
||||
int load_module(void)
|
||||
{
|
||||
return odbc_load_module();
|
||||
}
|
||||
|
||||
char *description(void)
|
||||
{
|
||||
return tdesc;
|
||||
}
|
||||
|
||||
int usecount(void)
|
||||
{
|
||||
if (! ast_mutex_trylock(&query_lock)) {
|
||||
ast_mutex_unlock(&query_lock);
|
||||
return 0;
|
||||
} else {
|
||||
return 1;
|
||||
}
|
||||
}
|
||||
|
||||
char *key()
|
||||
{
|
||||
return ASTERISK_GPL_KEY;
|
||||
}
|
||||
Reference in New Issue
Block a user