[Freeswitch-users] Random number generation

[KSrigo]

Yes “from-core" was my context for the test. You have to update according your config. Could you tell me your freeswitch version?
Mine is: FreeSWITCH Version 1.6.8-15-99de0ad~64bit. The config I gave you works fine on it.

Could you post your dialplan ?

Here is the whole dial plan I used for the test:

<include>
  <context name="from-core">
    <extension name="random_number_gen" continue="true">
      <condition field="destination_number" expression="^random_number_gen$" break="never">
        <!-- generate random number between 1 and 100 -->
        <action application="set" data="rand_val=${expr(randomize(&x);ceil(random(0,100,&x)))}" inline="true"/>
        <action application="log" data="INFO Random value is ${rand_val}"/>
      </condition>
    </extension>

    <extension name="Local_Extension">
      <condition field="destination_number" expression="^\*(85)$">
        <!--test 1-->
        <action application="execute_extension" data="random_number_gen XML from-core"/>
        <!--test 2-->
        <action application="execute_extension" data="random_number_gen XML from-core"/>
        <action application="hangup"/>
      </condition>
    </extension>
  </context>
<include>

Regards,
Srigo

> On Jan 24, 2017, at 10:52 AM, Chris Young <Chris.Young at enghouse.com> wrote:
> 
> Hi Srigo,
>  
> Thanks for your help. Unfortunately, I still see the same value getting generated each time the extension gets executed e.g.
>  
>                 51a7a226-27e6-4fe3-979b-0b0bb28253d9 2017-01-24 09:49:21.504783 [INFO] mod_dptools.c:1628 Random value is 1
> 70aae2dc-cee6-4a3c-805f-5655abd7e6e6 2017-01-24 09:49:21.965642 [INFO] mod_dptools.c:1628 Random value is 1
> 92e81c00-0ff0-4ddc-819f-019c145f39be 2017-01-24 09:49:22.444287 [INFO] mod_dptools.c:1628 Random value is 1
>  
> I take it that from-core is some context you've defined in your environment rather than anything special, as it didn't work when I used that (so I changed it to 'default')?
>  
> Regards,
> Chris
>  
>  
> From: freeswitch-users-bounces at lists.freeswitch.org [mailto:freeswitch-users-bounces at lists.freeswitch.org] On Behalf Of KSrigo
> Sent: 24 January 2017 09:14
> To: FreeSWITCH Users Help <freeswitch-users at lists.freeswitch.org>
> Subject: Re: [Freeswitch-users] Random number generation
>  
> Hi Chris,
>  
> I’m not sure if I understood exactly your needs. This is how I use randomize function:
>  
> Define Random Number Generator extension:
>  
> <extension name="random_number_gen" continue="true">
>   <condition field="destination_number" expression="^random_number_gen$" break="never">
>     <!-- generate random number between 1 and 100 -->
>     <action application="set" data="rand_val=${expr(randomize(&x);ceil(random(0,100,&x)))}" inline="true"/>
>     <action application="log" data="INFO Random value is ${rand_val}"/>
>   </condition>
> </extension>
>  
>  
> then call it in your diaplan each time you need to get a random number set:
>  
> <action application="execute_extension" data="random_number_gen XML from-core"/>
>  
>  
> Regards,
> Srigo
>  
>  
> On Jan 24, 2017, at 9:51 AM, Chris Young <Chris.Young at enghouse.com <mailto:Chris.Young at enghouse.com>> wrote:
>  
> Hello all,
>  
> On the wiki, there is an example of using mod_expr to generate a random number:
>  
>                 <!-- generate random number between 1 and 100 -->
>                 <action application="set" data="rand_val=${expr(randomize(&x);ceil(random(0,100,&x)))}"/>
>                 <action application="log" data="INFO Random value is ${rand_val}"/>
>  
> This works well the first time but if the same dialplan instructions are executed subsequently, the same number is produced each time.
>  
> Is this by design? Is there any other way to seed the random number generator so it will produce different results, as randomize() doesn't seem to be doing quite what I thought it would?
>  
> Many thanks,
> Chris
>  
> Chris Young 
> Software Engineer
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