Login | Register

Documentation

Documentation -> Manuals -> Manual 1.4 -> Script Statements

Pages for other versions: devel 1.11 1.10 1.9 old versions: 1.8 1.7 1.6 1.5 1.4


Script Statements v1.4
PrevNext

Table of Content (hide)

  1. 1. if
  2. 2. switch
  3. 3. while

Statements you can use in the OpenSIPS config file while building the routing logic.

1. if

IF-ELSE statement

Prototype:

    if (expr) {
       actions;
    } else {
       actions;
    }

The 'expr' should be a valid logical expression.

The logical operators that can be used in the logical expressions:

  • == - equal
  • != - not equal
  • =~ - regular expression matching (e.g. $rU =~ '^1800*' is "$rU begins with 1800" )
  • !~ - regular expression not-matching
  • > - greater
  • >= - greater or equal
  • < - less
  • <= - less or equal
  • && - logical AND
  • || - logical OR
  • ! - logical NOT
  • [ ... ] - test operator - inside can be any arithmetic expression

Example of usage:

    if ( is_method("INVITE") && $rp==5060 )
    {
        log("this sip message is an invite\n");
    } else {
        log("this sip message is not an invite\n");
    }

2. switch

SWITCH statement - it can be used to test the value of a pseudo-variable.

IMPORTANT NOTE: 'break' can be used only to mark the end of a 'case' branch (as it is in shell scripts). If you are trying to use 'break' outside a 'case' block the script will return error -- you must use 'return' there.

Example of usage:

    route {
        route(my_logic);
        switch($retcode)
        {
            case -1:
                log("process INVITE requests here\n");
            break;
            case 1:
                log("process REGISTER requests here\n");
            break;
            case 2:
            case 3:
                log("process SUBSCRIBE and NOTIFY requests here\n");
            break;
            default:
                log("process other requests here\n");
       }

        # switch of R-URI username
        switch($rU)
        {
            case "101":
                log("destination number is 101\n");
            break;
            case "102":
                log("destination number is 102\n");
            break;
            case "103":
            case "104":
                log("destination number is 103 or 104\n");
            break;
            default:
                log("unknown destination number\n");
       }
    }

    route[my_logic]{
        if(is_method("INVITE"))
        {
            return(-1);
        };
        if(is_method("REGISTER"))
            return(1);
        }
        if(is_method("SUBSCRIBE"))
            return(2);
        }
        if(is_method("NOTIFY"))
            return(3);
        }
        return(-2);
    }

Take care while using 'return' - 'return(0)' stops the execution of the script.

3. while

while statement

Example of usage:

    $var(i) = 0;
    while($var(i) < 10)
    {
        xlog("counter: $var(i)\n");
        $var(i) = $var(i) + 1;
    }

Page last modified on August 05, 2013, at 03:08 PM