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/*
* Asterisk -- An open source telephony toolkit.
*
* Copyright (c) 2003 - 2005 Tilghman Lesher. All rights reserved.
*
* Tilghman Lesher <asterisk__app_random__200508@the-tilghman.com>
*
* This code is released by the author with no restrictions on usage or distribution.
*
* 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.
*
*/
/*! \file
*
* \brief Random application
*
* \author Tilghman Lesher <asterisk__app_random__200508@the-tilghman.com>
* \ingroup applications
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include "asterisk.h"
ASTERISK_FILE_VERSION(__FILE__, "$Revision: 40821 $")
#include "asterisk/file.h"
#include "asterisk/logger.h"
#include "asterisk/options.h"
#include "asterisk/channel.h"
#include "asterisk/pbx.h"
#include "asterisk/module.h"
static char *tdesc = "Random goto";
static char *app_random = "Random";
static char *random_synopsis = "Conditionally branches, based upon a probability";
static char *random_descrip =
"Random([probability]:[[context|]extension|]priority)\n"
" probability := INTEGER in the range 1 to 100\n";
STANDARD_LOCAL_USER;
LOCAL_USER_DECL;
static char random_state[256];
static int random_exec(struct ast_channel *chan, void *data)
{
int res=0;
struct localuser *u;
char *s;
char *prob;
int probint;
if (ast_strlen_zero(data)) {
ast_log(LOG_WARNING, "Random requires an argument ([probability]:[[context|]extension|]priority)\n");
return -1;
}
LOCAL_USER_ADD(u);
s = ast_strdupa(data);
if (!s) {
ast_log(LOG_ERROR, "Out of memory!\n");
LOCAL_USER_REMOVE(u);
return -1;
}
prob = strsep(&s,":");
if ((!prob) || (sscanf(prob, "%d", &probint) != 1))
probint = 0;
if ((random() % 100) + probint >= 100) {
res = ast_parseable_goto(chan, s);
if (option_verbose > 2)
ast_verbose( VERBOSE_PREFIX_3 "Random branches to (%s,%s,%d)\n",
chan->context,chan->exten, chan->priority+1);
}
LOCAL_USER_REMOVE(u);
return res;
}
int unload_module(void)
{
int res;
res = ast_unregister_application(app_random);
STANDARD_HANGUP_LOCALUSERS;
return res;
}
int load_module(void)
{
initstate((getppid() * 65535 + getpid()) % RAND_MAX, random_state, 256);
return ast_register_application(app_random, random_exec, random_synopsis, random_descrip);
}
char *description(void)
{
return tdesc;
}
int usecount(void)
{
/* Don't allow unload, since rand(3) depends upon this module being here. */
return 1;
}
char *key()
{
return ASTERISK_GPL_KEY;
}
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