How to do routing using javascript
The Javascript module has support for programmatically routing a call step by step.
Using the example below you will learn how to:
- route calls starting with specific blocks of numbers to the desired destinations
- route calls to a specific gateway set in accfile module
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Configure script in Javascript module
To configure a routing script you must list it in the javascript.conf file. In general section parameter routing must contain the name of the script.
[general] routing=example.js
Configure a gateway
In order to route outside a gateway is required. To set the gateway you must configure it in accfile.conf.
[gwout] enabled=yes protocol=sip username=outcalls password=mypass registrar=a.b.c.d
Routing Script
Write example.js in /usr/src/yate/share/scripts where Yate scripts are (or where you have Yate sources).
// First display calling and called party numbers Engine.output("Got call from '" + message.caller + "' to '" + message.called + "'"); if (message.called.substr(0,2)=="19") { // route calls starting with 19 to 192.168.168.1 // 5060 is the default SIP port. When using the default port you don't need to specify it Channel.callJust("sip/sip:" + message.called + "@192.168.168.1:5060"); } else if (message.called.substr(0,2)=="00" && message.called.length>10) { //route calls using a function routeOutside(); } else if (message.called.match("^60")) { //route calls starting with 60 to 192.168.168.1 Channel.callJust("h323/"+message.called+"@192.168.168.1:1720"); } else if (message.caller=="209") { //route calls from caller: 209 Channel.callJust("iax/user_iax@192.168.168.1:4569/"+message.called+"@iaxcontext"); } else { //route other calls that don't match the above rules Channel.callJust("wave/play//var/spool/sounds/hello.au"); } function routeOutside() { // rewrite caller number for all calls that will be routed to this account message.caller = "+40211231234"; // rewrite called number: strip 00 and add +_in front of the number message.called = "+" + message.called.substr(2); // send all calls starting with +40 to line "gwout" defined in accfile.conf message.line = "gwout"; Channel.callJust("line/"+message.called); }
How it works
When a call is coming, a new instance is created and associated with the inbound call leg.
The main code flow (that is, outside any function) is then executed after setting the call.route message parameters in the message variable.
The Javascript code can make decisions based on these parameters and can call methods of the Channel object to route the call to the desired destination.
As you can see in the example:
- if called startes with "19" route it to sip/sip:called@192.168.168.1:5060
- if called startes with "60" route it to h323/called@192.168.168.1:1720
- if caller is "209" route it to iax/user_iax@192.168.168.1:4569/called@iaxcontext
where caller and called parameters are caller number and called number.
See also