Kamailio pseudo variables
Overview
Kamailio pseudo variable 내용 정리
Basic
Kamailio 에는 여러 가지 pseudo-variable 이 있다.
Pseudo Variables
$rs - SIP reply code
Reference to reply's status (status-code, response-code, reply-code).
$ru - Request URI
Reference to request's URI(address in the first line of a SIP request). It is R/W variable(you can assign values to it directly in configuration file).
$rU - Username in R-URI
Reference to username in request's URI or to the Namespace Identifier of a URN(See RFC 2141).
$si - Source IP address
Reference to IP source address of the message - See also $siz.
$sid - Server ID
The value for server ID(server_id parameter).
$siz - Source IP address
Reference to IP address address of the message, with enclosing square brackets for IPv6.
$ua - User agent header
Reference to user agent header field.
$var(name) - Private memory variable(zero)
$var(name) refers to variables that can be used in configuration script, having integer or string value. This kind of variables are faster than AVPs, being referenced directly to memory location. <source lang=bash> $var(a) = 2; #-- sets the value of variable 'a' to integer '2' $var(a) = "2" #-- sets the value of variable 'a' to string '2' $var(a) = "sip:" + $au + "@" + $fd; #-- compose a value from authentication username and From URI domain. $var(a) = 3 + (7&(~2));
if( $var(a) & 4 ) {
xlog("var a has third bit set\n");
} </source>
Setting a variable to $null is actually initializing the value to integer '0'. This type of script variable doesn't have &null value. <source lang=bash> $var(x) = $null
if ($var(x) == 0) { # this is true
...
} </source>