It all depends on what you are trying to do with your module.

You can use a dialplan handler in your module (see mod_enum for example) to route inbound calls using your custom dialplan.

You can use a state handler in your module and bind to channel states (much like binding to events).

You can create a dialplan app in your module to execute code when the app is called in dialplan

(Example: <application action="mycustom_module" data="${uuid} arg1 arg2"/>)

You can use an endpoint in your module to originate calls outbound (see mod_lcr or mod_callcenter for an example)

Also, you can create an API for your module

IMO creating a module is much more powerful than using a script with ESL.

But if you are going to create a module, you really don't need to mess with events (unless they are very specific events like CUSTOM::) because your module has access to much of the freeswitch core.

Thanks.

On Thu, Mar 5, 2015 at 5:07 AM, Stanislav Sinyagin <ssinyagin@gmail.com> wrote:

why at all do you need it to be a C module inside FreeSWITCH?

Why not writing an ESL program which would subscribe to events and
perform the needed actions?

How about the following scenario:

1. In the XML dialplan, you execute "park" application on the incoming call.

2. Your program is listening to events via ESL, and it recognizes that
a channel has been parked

3. Your program starts to playback the ringback tone into that channel

4. Your program performs all the needed lookups and sets needed
variables on the channel

5. Your program transfers or bridges the call where needed.

This is quite easy to implement in any programming language of your
choice, easy to debug, and it's easily scalable. It can be done in a
multi-threading fashion, like Go or Erlang, or even Java, and perform
as many parallel calls as required.

quite easy, and you don't have to mess with FreeSWITCH internals :)

On Thu, Mar 5, 2015 at 4:07 AM, Juan Pablo L.
<jpablolorenzetti@hotmail.com> wrote:
> Hi, i m writing a module in C that needs to check for certain information in
> a
> database for the caller and the destination number,
> for this the module is subscribing to the CS_INIT channel events, so
> everytime a channel is created
> the module callback is called and it checks the numbers,
> the problem is that the callback gets called twice,
> for the creation of the a-leg of the call and the creation of the b-leg.
> Is there any way to accomplish what i m trying to do ?
> Am i doing it the wrong way?
> I have already try getting testing for the flags in the channel but it did
> not work,
> testing of originator or originating does not yield anything ....
>
> i might be doing it wrong maybe ?
>
> Thanks!
>
>

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