2005-11-08 23:37:53 +00:00
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/*
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* Asterisk -- An open source telephony toolkit.
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*
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2006-09-26 17:25:27 +00:00
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* Copyright (c) 2004-2006 Tilghman Lesher <app_stack_v003@the-tilghman.com>.
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2005-11-08 23:37:53 +00:00
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*
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* This code is released by the author with no restrictions on usage.
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License Version 2. See the LICENSE file
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* at the top of the source tree.
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*/
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/*! \file
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*
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* \brief Stack applications Gosub, Return, etc.
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2005-12-30 21:18:06 +00:00
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*
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2006-09-26 17:25:27 +00:00
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* \author Tilghman Lesher <app_stack_v003@the-tilghman.com>
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2005-11-08 23:37:53 +00:00
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*
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* \ingroup applications
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*/
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2008-10-15 08:55:47 +00:00
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/*** MODULEINFO
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2008-11-02 23:34:39 +00:00
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<use>res_agi</use>
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2008-10-15 08:55:47 +00:00
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***/
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2006-06-07 18:54:56 +00:00
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#include "asterisk.h"
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ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
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2005-11-08 23:37:53 +00:00
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#include "asterisk/pbx.h"
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#include "asterisk/module.h"
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2006-09-26 17:25:27 +00:00
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#include "asterisk/app.h"
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2007-06-20 04:36:23 +00:00
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#include "asterisk/manager.h"
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2007-11-22 03:50:04 +00:00
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#include "asterisk/channel.h"
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2008-05-30 16:10:46 +00:00
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#include "asterisk/agi.h"
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2005-11-08 23:37:53 +00:00
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2008-11-01 21:10:07 +00:00
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/*** DOCUMENTATION
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<application name="Gosub" language="en_US">
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<synopsis>
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Jump to label, saving return address.
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</synopsis>
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<syntax>
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<parameter name="context" />
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<parameter name="exten" />
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<parameter name="priority" required="true" hasparams="optional">
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<argument name="arg1" multiple="true" required="true" />
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<argument name="argN" />
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</parameter>
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</syntax>
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<description>
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<para>Jumps to the label specified, saving the return address.</para>
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</description>
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2008-11-05 13:07:29 +00:00
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<see-also>
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<ref type="application">GosubIf</ref>
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<ref type="application">Macro</ref>
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<ref type="application">Goto</ref>
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<ref type="application">Return</ref>
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<ref type="application">StackPop</ref>
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</see-also>
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2008-11-01 21:10:07 +00:00
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</application>
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<application name="GosubIf" language="en_US">
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<synopsis>
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Conditionally jump to label, saving return address.
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</synopsis>
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<syntax argsep="?">
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<parameter name="condition" required="true" />
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<parameter name="destination" required="true" argsep=":">
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<argument name="labeliftrue" hasparams="optional">
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<argument name="arg1" required="true" multiple="true" />
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<argument name="argN" />
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</argument>
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<argument name="labeliffalse" hasparams="optional">
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<argument name="arg1" required="true" multiple="true" />
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<argument name="argN" />
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</argument>
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</parameter>
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</syntax>
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<description>
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<para>If the condition is true, then jump to labeliftrue. If false, jumps to
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labeliffalse, if specified. In either case, a jump saves the return point
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in the dialplan, to be returned to with a Return.</para>
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</description>
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2008-11-05 13:07:29 +00:00
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<see-also>
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<ref type="application">Gosub</ref>
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<ref type="application">Return</ref>
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<ref type="application">MacroIf</ref>
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<ref type="function">IF</ref>
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<ref type="application">GotoIf</ref>
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</see-also>
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2008-11-01 21:10:07 +00:00
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</application>
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<application name="Return" language="en_US">
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<synopsis>
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Return from gosub routine.
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</synopsis>
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<syntax>
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<parameter name="value">
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<para>Return value.</para>
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</parameter>
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</syntax>
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<description>
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<para>Jumps to the last label on the stack, removing it. The return <replaceable>value</replaceable>, if
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any, is saved in the channel variable <variable>GOSUB_RETVAL</variable>.</para>
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</description>
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2008-11-05 13:07:29 +00:00
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<see-also>
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<ref type="application">Gosub</ref>
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<ref type="application">StackPop</ref>
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</see-also>
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2008-11-01 21:10:07 +00:00
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</application>
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<application name="StackPop" language="en_US">
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<synopsis>
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Remove one address from gosub stack.
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</synopsis>
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<syntax />
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<description>
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<para>Removes last label on the stack, discarding it.</para>
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</description>
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2008-11-05 13:07:29 +00:00
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<see-also>
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<ref type="application">Return</ref>
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<ref type="application">Gosub</ref>
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</see-also>
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2008-11-01 21:10:07 +00:00
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</application>
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2008-11-03 17:11:22 +00:00
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<function name="LOCAL" language="en_US">
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<synopsis>
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Manage variables local to the gosub stack frame.
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</synopsis>
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<syntax>
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<parameter name="varname" required="true" />
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</syntax>
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<description>
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<para>Read and write a variable local to the gosub stack frame, once we Return() it will be lost
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(or it will go back to whatever value it had before the Gosub()).</para>
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</description>
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<see-also>
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<ref type="application">Gosub</ref>
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<ref type="application">GosubIf</ref>
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<ref type="application">Return</ref>
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</see-also>
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</function>
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2008-11-01 21:10:07 +00:00
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***/
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2008-06-05 15:58:11 +00:00
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2005-11-08 23:37:53 +00:00
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static const char *app_gosub = "Gosub";
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static const char *app_gosubif = "GosubIf";
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static const char *app_return = "Return";
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static const char *app_pop = "StackPop";
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2007-03-03 16:43:36 +00:00
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static void gosub_free(void *data);
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static struct ast_datastore_info stack_info = {
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.type = "GOSUB",
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.destroy = gosub_free,
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};
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struct gosub_stack_frame {
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AST_LIST_ENTRY(gosub_stack_frame) entries;
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/* 100 arguments is all that we support anyway, but this will handle up to 255 */
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unsigned char arguments;
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2007-06-20 04:36:23 +00:00
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struct varshead varshead;
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2007-03-03 16:43:36 +00:00
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int priority;
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char *context;
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char extension[0];
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};
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2007-06-20 13:00:45 +00:00
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static int frame_set_var(struct ast_channel *chan, struct gosub_stack_frame *frame, const char *var, const char *value)
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{
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struct ast_var_t *variables;
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int found = 0;
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/* Does this variable already exist? */
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AST_LIST_TRAVERSE(&frame->varshead, variables, entries) {
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if (!strcmp(var, ast_var_name(variables))) {
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found = 1;
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break;
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}
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}
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if (!ast_strlen_zero(value)) {
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if (!found) {
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variables = ast_var_assign(var, "");
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AST_LIST_INSERT_HEAD(&frame->varshead, variables, entries);
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pbx_builtin_pushvar_helper(chan, var, value);
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} else
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pbx_builtin_setvar_helper(chan, var, value);
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2008-01-10 00:12:35 +00:00
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manager_event(EVENT_FLAG_DIALPLAN, "VarSet",
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2007-06-20 13:00:45 +00:00
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"Channel: %s\r\n"
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"Variable: LOCAL(%s)\r\n"
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"Value: %s\r\n"
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"Uniqueid: %s\r\n",
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chan->name, var, value, chan->uniqueid);
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}
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return 0;
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}
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2007-03-03 16:43:36 +00:00
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static void gosub_release_frame(struct ast_channel *chan, struct gosub_stack_frame *frame)
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2005-11-08 23:37:53 +00:00
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{
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2007-06-20 04:36:23 +00:00
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struct ast_var_t *vardata;
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2006-09-26 17:25:27 +00:00
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2007-03-03 16:43:36 +00:00
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/* If chan is not defined, then we're calling it as part of gosub_free,
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* and the channel variables will be deallocated anyway. Otherwise, we're
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* just releasing a single frame, so we need to clean up the arguments for
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* that frame, so that we re-expose the variables from the previous frame
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* that were hidden by this one.
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*/
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2007-06-20 05:47:05 +00:00
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while ((vardata = AST_LIST_REMOVE_HEAD(&frame->varshead, entries))) {
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if (chan)
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pbx_builtin_setvar_helper(chan, ast_var_name(vardata), NULL);
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2007-06-20 04:36:23 +00:00
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ast_var_delete(vardata);
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2007-06-20 05:47:05 +00:00
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}
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2007-06-20 04:36:23 +00:00
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2007-03-03 16:43:36 +00:00
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ast_free(frame);
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}
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2006-09-26 17:25:27 +00:00
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2007-03-03 16:43:36 +00:00
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static struct gosub_stack_frame *gosub_allocate_frame(const char *context, const char *extension, int priority, unsigned char arguments)
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{
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struct gosub_stack_frame *new = NULL;
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int len_extension = strlen(extension), len_context = strlen(context);
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if ((new = ast_calloc(1, sizeof(*new) + 2 + len_extension + len_context))) {
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2007-06-20 04:36:23 +00:00
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AST_LIST_HEAD_INIT_NOLOCK(&new->varshead);
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2007-03-03 16:43:36 +00:00
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strcpy(new->extension, extension);
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new->context = new->extension + len_extension + 1;
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strcpy(new->context, context);
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new->priority = priority;
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new->arguments = arguments;
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}
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return new;
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}
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static void gosub_free(void *data)
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{
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AST_LIST_HEAD(, gosub_stack_frame) *oldlist = data;
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struct gosub_stack_frame *oldframe;
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AST_LIST_LOCK(oldlist);
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while ((oldframe = AST_LIST_REMOVE_HEAD(oldlist, entries))) {
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gosub_release_frame(NULL, oldframe);
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}
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AST_LIST_UNLOCK(oldlist);
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AST_LIST_HEAD_DESTROY(oldlist);
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ast_free(oldlist);
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}
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static int pop_exec(struct ast_channel *chan, void *data)
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{
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struct ast_datastore *stack_store = ast_channel_datastore_find(chan, &stack_info, NULL);
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struct gosub_stack_frame *oldframe;
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AST_LIST_HEAD(, gosub_stack_frame) *oldlist;
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if (!stack_store) {
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ast_log(LOG_WARNING, "%s called with no gosub stack allocated.\n", app_pop);
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return 0;
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}
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oldlist = stack_store->data;
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AST_LIST_LOCK(oldlist);
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oldframe = AST_LIST_REMOVE_HEAD(oldlist, entries);
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AST_LIST_UNLOCK(oldlist);
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2007-06-14 19:39:12 +00:00
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if (oldframe) {
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2007-03-03 16:43:36 +00:00
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gosub_release_frame(chan, oldframe);
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2007-06-14 19:39:12 +00:00
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} else {
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ast_debug(1, "%s called with an empty gosub stack\n", app_pop);
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}
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2005-11-08 23:37:53 +00:00
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return 0;
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}
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static int return_exec(struct ast_channel *chan, void *data)
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{
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2007-03-03 16:43:36 +00:00
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struct ast_datastore *stack_store = ast_channel_datastore_find(chan, &stack_info, NULL);
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struct gosub_stack_frame *oldframe;
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AST_LIST_HEAD(, gosub_stack_frame) *oldlist;
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char *retval = data;
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2005-11-08 23:37:53 +00:00
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2007-03-03 16:43:36 +00:00
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if (!stack_store) {
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ast_log(LOG_ERROR, "Return without Gosub: stack is unallocated\n");
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2005-11-08 23:37:53 +00:00
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return -1;
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2006-09-26 17:25:27 +00:00
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}
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2007-03-03 16:43:36 +00:00
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oldlist = stack_store->data;
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AST_LIST_LOCK(oldlist);
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oldframe = AST_LIST_REMOVE_HEAD(oldlist, entries);
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AST_LIST_UNLOCK(oldlist);
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2006-09-26 17:25:27 +00:00
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2007-03-03 16:43:36 +00:00
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if (!oldframe) {
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ast_log(LOG_ERROR, "Return without Gosub: stack is empty\n");
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2005-11-08 23:37:53 +00:00
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return -1;
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}
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2007-03-03 16:43:36 +00:00
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ast_explicit_goto(chan, oldframe->context, oldframe->extension, oldframe->priority);
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gosub_release_frame(chan, oldframe);
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2006-09-26 17:25:27 +00:00
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/* Set a return value, if any */
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pbx_builtin_setvar_helper(chan, "GOSUB_RETVAL", S_OR(retval, ""));
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2005-11-08 23:37:53 +00:00
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return 0;
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}
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static int gosub_exec(struct ast_channel *chan, void *data)
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{
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2007-03-03 16:43:36 +00:00
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struct ast_datastore *stack_store = ast_channel_datastore_find(chan, &stack_info, NULL);
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AST_LIST_HEAD(, gosub_stack_frame) *oldlist;
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struct gosub_stack_frame *newframe;
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2006-10-03 15:50:25 +00:00
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char argname[15], *tmp = ast_strdupa(data), *label, *endparen;
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2006-09-26 17:25:27 +00:00
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int i;
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AST_DECLARE_APP_ARGS(args2,
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AST_APP_ARG(argval)[100];
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);
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2005-11-08 23:37:53 +00:00
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if (ast_strlen_zero(data)) {
|
2008-05-30 16:10:46 +00:00
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ast_log(LOG_ERROR, "%s requires an argument: %s([[context,]exten,]priority[(arg1[,...][,argN])])\n", app_gosub, app_gosub);
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2005-11-08 23:37:53 +00:00
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
2007-03-03 16:43:36 +00:00
|
|
|
if (!stack_store) {
|
2007-06-14 19:39:12 +00:00
|
|
|
ast_debug(1, "Channel %s has no datastore, so we're allocating one.\n", chan->name);
|
2008-08-05 16:56:11 +00:00
|
|
|
stack_store = ast_datastore_alloc(&stack_info, NULL);
|
2007-03-03 16:43:36 +00:00
|
|
|
if (!stack_store) {
|
|
|
|
ast_log(LOG_ERROR, "Unable to allocate new datastore. Gosub will fail.\n");
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
|
|
|
oldlist = ast_calloc(1, sizeof(*oldlist));
|
|
|
|
if (!oldlist) {
|
|
|
|
ast_log(LOG_ERROR, "Unable to allocate datastore list head. Gosub will fail.\n");
|
2008-08-05 16:56:11 +00:00
|
|
|
ast_datastore_free(stack_store);
|
2007-03-03 16:43:36 +00:00
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
|
|
|
stack_store->data = oldlist;
|
|
|
|
AST_LIST_HEAD_INIT(oldlist);
|
|
|
|
ast_channel_datastore_add(chan, stack_store);
|
|
|
|
}
|
|
|
|
|
2006-10-02 04:17:57 +00:00
|
|
|
/* Separate the arguments from the label */
|
2006-10-03 15:50:25 +00:00
|
|
|
/* NOTE: you cannot use ast_app_separate_args for this, because '(' cannot be used as a delimiter. */
|
|
|
|
label = strsep(&tmp, "(");
|
|
|
|
if (tmp) {
|
|
|
|
endparen = strrchr(tmp, ')');
|
2006-10-02 04:17:57 +00:00
|
|
|
if (endparen)
|
|
|
|
*endparen = '\0';
|
2006-10-03 15:50:25 +00:00
|
|
|
else
|
|
|
|
ast_log(LOG_WARNING, "Ouch. No closing paren: '%s'?\n", (char *)data);
|
|
|
|
AST_STANDARD_APP_ARGS(args2, tmp);
|
|
|
|
} else
|
|
|
|
args2.argc = 0;
|
2006-09-26 17:25:27 +00:00
|
|
|
|
2006-10-02 04:17:57 +00:00
|
|
|
/* Create the return address, but don't save it until we know that the Gosub destination exists */
|
2007-03-03 16:43:36 +00:00
|
|
|
newframe = gosub_allocate_frame(chan->context, chan->exten, chan->priority + 1, args2.argc);
|
2005-11-08 23:37:53 +00:00
|
|
|
|
2007-06-20 13:00:45 +00:00
|
|
|
if (!newframe)
|
|
|
|
return -1;
|
|
|
|
|
2006-10-03 15:50:25 +00:00
|
|
|
if (ast_parseable_goto(chan, label)) {
|
|
|
|
ast_log(LOG_ERROR, "Gosub address is invalid: '%s'\n", (char *)data);
|
2007-03-03 16:43:36 +00:00
|
|
|
ast_free(newframe);
|
2005-11-08 23:37:53 +00:00
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
2006-09-26 17:25:27 +00:00
|
|
|
/* Now that we know for certain that we're going to a new location, set our arguments */
|
2006-10-03 15:50:25 +00:00
|
|
|
for (i = 0; i < args2.argc; i++) {
|
2006-09-26 17:25:27 +00:00
|
|
|
snprintf(argname, sizeof(argname), "ARG%d", i + 1);
|
2007-06-20 13:00:45 +00:00
|
|
|
frame_set_var(chan, newframe, argname, args2.argval[i]);
|
2007-06-14 19:39:12 +00:00
|
|
|
ast_debug(1, "Setting '%s' to '%s'\n", argname, args2.argval[i]);
|
2006-09-26 17:25:27 +00:00
|
|
|
}
|
2008-10-27 16:44:55 +00:00
|
|
|
snprintf(argname, sizeof(argname), "%d", args2.argc);
|
|
|
|
frame_set_var(chan, newframe, "ARGC", argname);
|
2006-09-26 17:25:27 +00:00
|
|
|
|
2006-10-02 04:17:57 +00:00
|
|
|
/* And finally, save our return address */
|
2007-03-03 16:43:36 +00:00
|
|
|
oldlist = stack_store->data;
|
|
|
|
AST_LIST_LOCK(oldlist);
|
|
|
|
AST_LIST_INSERT_HEAD(oldlist, newframe, entries);
|
|
|
|
AST_LIST_UNLOCK(oldlist);
|
|
|
|
|
2005-11-08 23:37:53 +00:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int gosubif_exec(struct ast_channel *chan, void *data)
|
|
|
|
{
|
2006-10-02 22:02:45 +00:00
|
|
|
char *args;
|
2005-11-08 23:37:53 +00:00
|
|
|
int res=0;
|
2006-10-02 22:02:45 +00:00
|
|
|
AST_DECLARE_APP_ARGS(cond,
|
|
|
|
AST_APP_ARG(ition);
|
|
|
|
AST_APP_ARG(labels);
|
|
|
|
);
|
|
|
|
AST_DECLARE_APP_ARGS(label,
|
|
|
|
AST_APP_ARG(iftrue);
|
|
|
|
AST_APP_ARG(iffalse);
|
|
|
|
);
|
2005-11-08 23:37:53 +00:00
|
|
|
|
|
|
|
if (ast_strlen_zero(data)) {
|
2006-10-02 04:17:57 +00:00
|
|
|
ast_log(LOG_WARNING, "GosubIf requires an argument: GosubIf(cond?label1(args):label2(args)\n");
|
2005-11-08 23:37:53 +00:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2006-10-02 22:02:45 +00:00
|
|
|
args = ast_strdupa(data);
|
|
|
|
AST_NONSTANDARD_APP_ARGS(cond, args, '?');
|
|
|
|
if (cond.argc != 2) {
|
|
|
|
ast_log(LOG_WARNING, "GosubIf requires an argument: GosubIf(cond?label1(args):label2(args)\n");
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
AST_NONSTANDARD_APP_ARGS(label, cond.labels, ':');
|
2005-11-08 23:37:53 +00:00
|
|
|
|
2006-10-02 22:02:45 +00:00
|
|
|
if (pbx_checkcondition(cond.ition)) {
|
|
|
|
if (!ast_strlen_zero(label.iftrue))
|
|
|
|
res = gosub_exec(chan, label.iftrue);
|
|
|
|
} else if (!ast_strlen_zero(label.iffalse)) {
|
|
|
|
res = gosub_exec(chan, label.iffalse);
|
2005-11-08 23:37:53 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
return res;
|
|
|
|
}
|
|
|
|
|
2007-06-20 04:36:23 +00:00
|
|
|
static int local_read(struct ast_channel *chan, const char *cmd, char *data, char *buf, size_t len)
|
|
|
|
{
|
|
|
|
struct ast_datastore *stack_store = ast_channel_datastore_find(chan, &stack_info, NULL);
|
|
|
|
AST_LIST_HEAD(, gosub_stack_frame) *oldlist;
|
|
|
|
struct gosub_stack_frame *frame;
|
|
|
|
struct ast_var_t *variables;
|
|
|
|
|
|
|
|
if (!stack_store)
|
|
|
|
return -1;
|
|
|
|
|
|
|
|
oldlist = stack_store->data;
|
|
|
|
AST_LIST_LOCK(oldlist);
|
|
|
|
frame = AST_LIST_FIRST(oldlist);
|
|
|
|
AST_LIST_TRAVERSE(&frame->varshead, variables, entries) {
|
|
|
|
if (!strcmp(data, ast_var_name(variables))) {
|
2008-04-30 19:21:04 +00:00
|
|
|
const char *tmp;
|
|
|
|
ast_channel_lock(chan);
|
|
|
|
tmp = pbx_builtin_getvar_helper(chan, data);
|
2007-06-20 05:47:05 +00:00
|
|
|
ast_copy_string(buf, S_OR(tmp, ""), len);
|
2008-04-30 19:21:04 +00:00
|
|
|
ast_channel_unlock(chan);
|
2007-06-20 04:36:23 +00:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
AST_LIST_UNLOCK(oldlist);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int local_write(struct ast_channel *chan, const char *cmd, char *var, const char *value)
|
|
|
|
{
|
|
|
|
struct ast_datastore *stack_store = ast_channel_datastore_find(chan, &stack_info, NULL);
|
|
|
|
AST_LIST_HEAD(, gosub_stack_frame) *oldlist;
|
|
|
|
struct gosub_stack_frame *frame;
|
|
|
|
|
|
|
|
if (!stack_store) {
|
|
|
|
ast_log(LOG_ERROR, "Tried to set LOCAL(%s), but we aren't within a Gosub routine\n", var);
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
|
|
|
oldlist = stack_store->data;
|
|
|
|
AST_LIST_LOCK(oldlist);
|
|
|
|
frame = AST_LIST_FIRST(oldlist);
|
2007-06-20 05:47:05 +00:00
|
|
|
|
2007-06-20 13:00:45 +00:00
|
|
|
if (frame)
|
|
|
|
frame_set_var(chan, frame, var, value);
|
2007-06-20 04:36:23 +00:00
|
|
|
|
|
|
|
AST_LIST_UNLOCK(oldlist);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct ast_custom_function local_function = {
|
|
|
|
.name = "LOCAL",
|
|
|
|
.write = local_write,
|
|
|
|
.read = local_read,
|
|
|
|
};
|
|
|
|
|
2008-05-30 16:10:46 +00:00
|
|
|
static int handle_gosub(struct ast_channel *chan, AGI *agi, int argc, char **argv)
|
|
|
|
{
|
|
|
|
int old_priority, priority;
|
|
|
|
char old_context[AST_MAX_CONTEXT], old_extension[AST_MAX_EXTENSION];
|
|
|
|
struct ast_app *theapp;
|
|
|
|
char *gosub_args;
|
|
|
|
|
|
|
|
if (argc < 4 || argc > 5) {
|
|
|
|
return RESULT_SHOWUSAGE;
|
|
|
|
}
|
|
|
|
|
|
|
|
ast_debug(1, "Gosub called with %d arguments: 0:%s 1:%s 2:%s 3:%s 4:%s\n", argc, argv[0], argv[1], argv[2], argv[3], argc == 5 ? argv[4] : "");
|
|
|
|
|
|
|
|
if (sscanf(argv[3], "%d", &priority) != 1 || priority < 1) {
|
|
|
|
/* Lookup the priority label */
|
|
|
|
if ((priority = ast_findlabel_extension(chan, argv[1], argv[2], argv[3], chan->cid.cid_num)) < 0) {
|
|
|
|
ast_log(LOG_ERROR, "Priority '%s' not found in '%s@%s'\n", argv[3], argv[2], argv[1]);
|
2008-11-19 12:42:19 +00:00
|
|
|
ast_agi_send(agi->fd, chan, "200 result=-1 Gosub label not found\n");
|
2008-05-30 16:10:46 +00:00
|
|
|
return RESULT_FAILURE;
|
|
|
|
}
|
|
|
|
} else if (!ast_exists_extension(chan, argv[1], argv[2], priority, chan->cid.cid_num)) {
|
2008-11-19 12:42:19 +00:00
|
|
|
ast_agi_send(agi->fd, chan, "200 result=-1 Gosub label not found\n");
|
2008-05-30 16:10:46 +00:00
|
|
|
return RESULT_FAILURE;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Save previous location, since we're going to change it */
|
|
|
|
ast_copy_string(old_context, chan->context, sizeof(old_context));
|
|
|
|
ast_copy_string(old_extension, chan->exten, sizeof(old_extension));
|
|
|
|
old_priority = chan->priority;
|
|
|
|
|
|
|
|
if (!(theapp = pbx_findapp("Gosub"))) {
|
|
|
|
ast_log(LOG_ERROR, "Gosub() cannot be found in the list of loaded applications\n");
|
2008-11-19 12:42:19 +00:00
|
|
|
ast_agi_send(agi->fd, chan, "503 result=-2 Gosub is not loaded\n");
|
2008-05-30 16:10:46 +00:00
|
|
|
return RESULT_FAILURE;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Apparently, if you run ast_pbx_run on a channel that already has a pbx
|
|
|
|
* structure, you need to add 1 to the priority to get it to go to the
|
|
|
|
* right place. But if it doesn't have a pbx structure, then leaving off
|
|
|
|
* the 1 is the right thing to do. See how this code differs when we
|
|
|
|
* call a Gosub for the CALLEE channel in Dial or Queue.
|
|
|
|
*/
|
|
|
|
if (argc == 5) {
|
2008-11-02 18:52:13 +00:00
|
|
|
if (asprintf(&gosub_args, "%s,%s,%d(%s)", argv[1], argv[2], priority + 1, argv[4]) < 0) {
|
|
|
|
ast_log(LOG_WARNING, "asprintf() failed: %s\n", strerror(errno));
|
|
|
|
gosub_args = NULL;
|
|
|
|
}
|
2008-05-30 16:10:46 +00:00
|
|
|
} else {
|
2008-11-02 18:52:13 +00:00
|
|
|
if (asprintf(&gosub_args, "%s,%s,%d", argv[1], argv[2], priority + 1) < 0) {
|
|
|
|
ast_log(LOG_WARNING, "asprintf() failed: %s\n", strerror(errno));
|
|
|
|
gosub_args = NULL;
|
|
|
|
}
|
2008-05-30 16:10:46 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
if (gosub_args) {
|
|
|
|
int res;
|
|
|
|
|
|
|
|
ast_debug(1, "Trying gosub with arguments '%s'\n", gosub_args);
|
|
|
|
ast_copy_string(chan->context, "app_stack_gosub_virtual_context", sizeof(chan->context));
|
|
|
|
ast_copy_string(chan->exten, "s", sizeof(chan->exten));
|
|
|
|
chan->priority = 0;
|
|
|
|
|
|
|
|
if ((res = pbx_exec(chan, theapp, gosub_args)) == 0) {
|
2008-05-30 16:40:13 +00:00
|
|
|
struct ast_pbx *pbx = chan->pbx;
|
|
|
|
/* Suppress warning about PBX already existing */
|
|
|
|
chan->pbx = NULL;
|
2008-11-19 12:42:19 +00:00
|
|
|
ast_agi_send(agi->fd, chan, "100 result=0 Trying...\n");
|
2008-05-30 16:10:46 +00:00
|
|
|
ast_pbx_run(chan);
|
2008-11-19 12:42:19 +00:00
|
|
|
ast_agi_send(agi->fd, chan, "200 result=0 Gosub complete\n");
|
2008-05-30 16:40:13 +00:00
|
|
|
if (chan->pbx) {
|
|
|
|
ast_free(chan->pbx);
|
|
|
|
}
|
|
|
|
chan->pbx = pbx;
|
2008-05-30 16:10:46 +00:00
|
|
|
} else {
|
2008-11-19 12:42:19 +00:00
|
|
|
ast_agi_send(agi->fd, chan, "200 result=%d Gosub failed\n", res);
|
2008-05-30 16:10:46 +00:00
|
|
|
}
|
|
|
|
ast_free(gosub_args);
|
|
|
|
} else {
|
2008-11-19 12:42:19 +00:00
|
|
|
ast_agi_send(agi->fd, chan, "503 result=-2 Memory allocation failure\n");
|
2008-05-30 16:10:46 +00:00
|
|
|
return RESULT_FAILURE;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Restore previous location */
|
|
|
|
ast_copy_string(chan->context, old_context, sizeof(chan->context));
|
|
|
|
ast_copy_string(chan->exten, old_extension, sizeof(chan->exten));
|
|
|
|
chan->priority = old_priority;
|
|
|
|
|
|
|
|
return RESULT_SUCCESS;
|
|
|
|
}
|
|
|
|
|
|
|
|
static char usage_gosub[] =
|
|
|
|
" Usage: GOSUB <context> <extension> <priority> [<optional-argument>]\n"
|
|
|
|
" Cause the channel to execute the specified dialplan subroutine, returning\n"
|
|
|
|
" to the dialplan with execution of a Return()\n";
|
|
|
|
|
|
|
|
struct agi_command gosub_agi_command =
|
|
|
|
{ { "gosub", NULL }, handle_gosub, "Execute a dialplan subroutine", usage_gosub , 0 };
|
|
|
|
|
2006-08-21 02:11:39 +00:00
|
|
|
static int unload_module(void)
|
2005-11-08 23:37:53 +00:00
|
|
|
{
|
2008-05-30 16:10:46 +00:00
|
|
|
struct ast_context *con;
|
|
|
|
|
2008-11-26 21:20:50 +00:00
|
|
|
if (ast_agi_unregister(ast_module_info->self, &gosub_agi_command) == 1) {
|
2008-06-05 15:58:11 +00:00
|
|
|
if ((con = ast_context_find("app_stack_gosub_virtual_context"))) {
|
2008-06-16 20:43:46 +00:00
|
|
|
ast_context_remove_extension2(con, "s", 1, NULL, 0);
|
2008-06-05 15:58:11 +00:00
|
|
|
ast_context_destroy(con, "app_stack"); /* leave nothing behind */
|
|
|
|
}
|
2008-05-30 16:10:46 +00:00
|
|
|
}
|
|
|
|
|
2005-11-08 23:37:53 +00:00
|
|
|
ast_unregister_application(app_return);
|
|
|
|
ast_unregister_application(app_pop);
|
|
|
|
ast_unregister_application(app_gosubif);
|
|
|
|
ast_unregister_application(app_gosub);
|
2007-06-20 04:36:23 +00:00
|
|
|
ast_custom_function_unregister(&local_function);
|
2005-11-08 23:37:53 +00:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2006-08-21 02:11:39 +00:00
|
|
|
static int load_module(void)
|
2005-11-08 23:37:53 +00:00
|
|
|
{
|
2008-05-30 16:10:46 +00:00
|
|
|
struct ast_context *con;
|
2008-06-05 15:58:11 +00:00
|
|
|
|
2008-11-26 21:20:50 +00:00
|
|
|
if (ast_agi_register(ast_module_info->self, &gosub_agi_command) == 1) {
|
|
|
|
if (!(con = ast_context_find_or_create(NULL, NULL, "app_stack_gosub_virtual_context", "app_stack"))) {
|
2008-06-05 15:58:11 +00:00
|
|
|
ast_log(LOG_ERROR, "Virtual context 'app_stack_gosub_virtual_context' does not exist and unable to create\n");
|
|
|
|
return AST_MODULE_LOAD_DECLINE;
|
|
|
|
} else {
|
|
|
|
ast_add_extension2(con, 1, "s", 1, NULL, NULL, "KeepAlive", ast_strdup(""), ast_free_ptr, "app_stack");
|
|
|
|
}
|
2008-05-30 16:10:46 +00:00
|
|
|
}
|
|
|
|
|
2008-11-01 21:10:07 +00:00
|
|
|
ast_register_application_xml(app_pop, pop_exec);
|
|
|
|
ast_register_application_xml(app_return, return_exec);
|
|
|
|
ast_register_application_xml(app_gosubif, gosubif_exec);
|
|
|
|
ast_register_application_xml(app_gosub, gosub_exec);
|
2007-06-20 04:36:23 +00:00
|
|
|
ast_custom_function_register(&local_function);
|
2005-11-08 23:37:53 +00:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2007-05-30 05:17:09 +00:00
|
|
|
AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Dialplan subroutines (Gosub, Return, etc)");
|