Documentation

Documentation.Script-Operators History

Hide minor edits - Show changes to markup

May 28, 2013, at 11:53 PM by 92.80.35.155 -
Changed line 21 from:

Assignments can be done like in C, via '=' (equal) operator. Not that not all variables (from script) can be written, some are read-only. Check with listing of variables to see which ones can be written too.

to:

Assignments can be done like in C, via '=' (equal) operator. Not that not all variables (from script) can be written, some are read-only. Check with listing of variables to see which ones can be written too.

May 28, 2013, at 11:46 PM by 92.80.35.155 -
Changed line 10 from:
to:
May 28, 2013, at 11:43 PM by 92.80.35.155 -
Deleted line 12:

May 28, 2013, at 11:43 PM by 92.80.35.155 -
Changed lines 1-2 from:
Documentation -> Manuals -> Manual 1.9 -> Script Operators
to:
Documentation -> Manuals -> Manual devel -> Script Operators

(:title Script Operators - ver devel :)


Page for other versions: devel 1.9 1.8 old versions: 1.7 1.6 1.5 1.4


Script Operators devel
PrevNext

May 27, 2013, at 07:22 PM by 109.99.235.212 -
Deleted lines 5-7:

Script Operations

May 27, 2013, at 07:22 PM by 109.99.235.212 -
Added lines 1-67:
Documentation -> Manuals -> Manual 1.9 -> Script Operators

(:toc-float Table of Content:)

Script Operations

Assignments, string and arithmetic operations can be done directly in the configuration file.

Assignment

Assignments can be done like in C, via '=' (equal) operator. Not that not all variables (from script) can be written, some are read-only. Check with listing of variables to see which ones can be written too.

$var(a) = 123;
$ru = "sip:user@domain";

There is a special assign operator ':=' (colon equal) that can be used with AVPs. If the right value is null, all AVPs with that name are deleted. If different, the new value will overwrite any existing values for the AVPs with than name (on other words, delete existing AVPs with same name, add a new one with the right side value).

$avp(val) := 123;

String operations

For strings, '+' is available to concatenate.

$var(a) = "test";
$var(b) = "sip:" + $var(a) + "@" + $fd;

Arithmetic and bitwise operations

For numbers, one can use:

  • + : plus
  • - : minus
  • / : divide
  • * : multiply
  • % : modulo
  • | : bitwise OR
  • & : bitwise AND
  • ^ : bitwise XOR
  • ~ : bitwise NOT
  • << : bitwise left shift
  • >> : bitwise right shift

Example:

$var(a) = 4 + ( 7 & ( ~2 ) );

NOTE: to ensure the priority of operands in expression evaluations do use __parenthesis__.

Arithmetic expressions can be used in condition expressions via test operator ' [ ... ] '.

if( [ $var(a) & 4 ] )
    log("var a has third bit set\n");

Page last modified on May 28, 2013, at 11:53 PM