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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.
     *
     */
    
    /*
     *
     * Random application
     *
    
    #include <stdio.h>
    #include <stdlib.h>
    #include <unistd.h>
    #include <string.h>
    
    #include "asterisk.h"
    
    ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
    
    
    #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 int random_exec(struct ast_channel *chan, void *data)
    {
    	int res=0;
    	struct localuser *u;
    
    
    	char *s;
    
    	char *prob;
    
    		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) {
    
    		if (option_verbose > 2)
    			ast_verbose( VERBOSE_PREFIX_3 "Random branches to (%s,%s,%d)\n",
    				chan->context,chan->exten, chan->priority+1);
    	}
    
    	return res;
    }
    
    int unload_module(void)
    {
    
    	int res;
    	
    	res = ast_unregister_application(app_random);
    	
    
    	STANDARD_HANGUP_LOCALUSERS;
    
    }
    
    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)
    {
    	int res;
    	STANDARD_USECOUNT(res);
    	return res;
    }
    
    char *key()
    {
    	return ASTERISK_GPL_KEY;
    }