[asterisk-users] How to send a SIP MESSAGE outside a call

[Tiago Vasconcelos]

On 28-07-2012 18:23, Matthew Jordan wrote:
> You stated that you need to add some custom headers, which you can do with the
> MESSAGE_DATA function.  In order to activate the forwarding, you could
> do something like this:
>
> exten => send_msg,1,NoOp()
> same => n,Set(MESSAGE_DATA(X-Movial-Content)=application/x-movial-control;forwarding=true)
> ; If something needs to go in the body, replace this.  Otherwise,
> ; you can just remove it
> same => n,Set(MESSAGE(body)=hello world!)
> same => n,MessageSend(sip:to_address)

Matthew, you used the name "send_msg" which I found confusing since 
extensions.conf is the dialplan configuration file. So an "exten =>" is 
triggered by either an outbound or an inbound call.
I admit I may be ignorant, so could you please clarify how the message 
sending code you wrote above fits in the dialplan? How can it be 
triggered other than by an inbound/outbound call?

Since I didn't figure another way to do it, I associated your code with 
an extension. The idea was when the 101 extension is dialled, the SIP 
MESSAGE is sent to the provider:

exten => 101,1,NoOp()
same => 
n,Set(MESSAGE_DATA(X-Movial-Content)=application/x-movial-control;forwarding=true)
same => n,MessageSend(sip:54395135465 at provider)

But when I test it I get two errors:

   -- Executing [101 at house:1] NoOp("SIP/me1-0000000e", "") in new stack
     -- Executing [101 at house:2] Set("SIP/me1-0000000e", 
"MESSAGE_DATA(X-Movial-Content") in new stack
[Jul 29 21:09:25] WARNING[32728]: pbx.c:10208 pbx_builtin_setvar: Set 
requires an '=' to be a valid assignment.
     -- Executing [101 at house:3] MessageSend("SIP/me1-0000000e", 
"sip:54395135465 at provider") in new stack
[Jul 29 21:09:25] WARNING[32728]: message.c:992 msg_send_exec: No 
message data found on channel to send.


First, apparently Asterisk doesn't not like the syntax used for 
MESSAGE_DATA, although it seems correct... Could it be because the value 
also has a "=" sign?

Second, it complains "No message data found on channel to send". Maybe 
if the MESSAGE_DATA function was successful, this error would not show 
up. Or maybe I need to set an empty message body.

This feature of Asterisk is so new that there are almost no 
configuration examples of this on the Internet. So your help is really 
precious.

Tested with Asterisk 10.7.0-rc1


Thanks,
- Tiago