> > You can tell SIPp to change its rate using the control socket.
> Can I tell sipp, not to make next call, until I am ready again?
You can set the rate to zero.
 
> > You can probably change the call parameters using extended 3PCC.  If 
you 
> > establish a socket to a 3PCC element and setup various parameters 
(look at 
> > the replace and insert actions so that you can update the in-memory 
> > representation of the CSV file); you can then pass those parameters to 

> > another instance of SIPp that will generate the calls (or you might 
even 
> > be able to generate the calls from that instance).
> I will study 3PCC in more details, but can I pass the parameter from
> my external script to 3PCC?
Only if your external script speaks 3PCC.  It is relatively simple. You 
open a TCP connection to the 3PCC port, and send messages terminated by 
"\27" (i.e. the character 27.  The messages can contain anything you want. 
 The messages are SIP-like, and are something like the following:

Call-ID: Foo
From: class
Any-Random-Header: Value

Body text\27

Where Foo is the call ID you select, From is the names in slave.cfg, and 
Any-Random-Header and Body text are the infomration you want to put in. 
SIPp internally adds the \27, but if you need an external script you'll 
need to do it yourself.

> > If you do modify the injection file, I would suggest using something 
like 
> > a MySQL database as a backing store and querying the database. 
> I believe this is alternative to my socket based approach. However if
> 3PCC approach works, I may not need to need this. In any case, could you
> please point me to the files, that I should start looking at?
message.cpp defines the keywords (the SendingMessage class parses the XML 
into a structure); call.cpp (create_sending_message) interprets the 
structure created by message.cpp; and infile.cpp handles the file 
keywords.
 
Charles

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