To use a template when creating another section, simply put the template name in parentheses after the section heading name, as shown in the example below. If you want to inherit from multiple templates, use commas to separate the template names).
[template-name](!)
setting=value
[template-2](!)
setting2=value2
[not-a-template]
setting4=value4
[section-name](template-name,template-2,not-a-template)
setting3=value3
This works even when the section name referenced in parentheses is not defined as a template as in the case of the "not-a-template" section.
The newly-created section will inherit all the values and objects defined in the template(s), as well as any new settings or objects defined in the newly-created section. The settings and objects defined in the newly-created section override settings or objects of the same name from the templates. Consider this example:
[test-one](!)
permit=192.168.0.2
host=alpha.example.com
deny=192.168.0.1
[test-two](!)
permit=192.168.1.2
host=bravo.example.com
deny=192.168.1.1
[test-three](test-one,test-two)
permit=192.168.3.1
host=charlie.example.com
The [test-three] section will be processed as though it had been written in the following way:
chan_sip Template Example¶
Here is a more extensive and realistic example from the chan_sip channel driver's sample configuration file.
[basic-options](!) ; a template
dtmfmode=rfc2833
context=from-office
type=friend
[natted-phone](!,basic-options) ; another template inheriting basic-options
nat=yes
directmedia=no
host=dynamic
[public-phone](!,basic-options) ; another template inheriting basic-options
nat=no
directmedia=yes
[my-codecs](!) ; a template for my preferred codecs
disallow=all
allow=ilbc
allow=g729
allow=gsm
allow=g723
allow=ulaw
[ulaw-phone](!) ; and another one for ulaw-only
disallow=all
allow=ulaw
; and finally instantiate a few phones
;
; [2133](natted-phone,my-codecs)
; secret = peekaboo
; [2134](natted-phone,ulaw-phone)
; secret = not_very_secret
; [2136](public-phone,ulaw-phone)
; secret = not_very_secret_either