# &adminguide;

## Overview

The purpose of the Script Helper module is to simplify the scripting process in OpenSIPS when doing basic scenarios. At the same time, it is useful to script writers as it contains basic SIP routing logic, and thus it allows them to focus more on the particular aspects of their OpenSIPS routing code.

## How it works

By simply loading the module, the following default logic will be embedded:

- for initial SIP requests, the module will perform record routing before running the main request route

- sequential SIP requests will be transparently handled - the module will perform loose routing, and the request route will not be run at all

Currently, the module may be further configured to embed the following optional logic:

- dialog support (dialog module dependency - must be loaded before this module)

- an additional route to be run before relaying sequential requests

## Dependencies

### &osips; Modules

The following modules must be loaded before this module:

- dialog (only if use_dialog is enabled).

### External Libraries or Applications

The following libraries or applications must be installed before running &osips; with this module loaded:

- None.

## Exported Parameters

### `use_dialog` (integer)

Enables dialog support. Note that the dialog module must be loaded before this module when setting this parameter.

Default value is 0 (disabled)

#### Setting `use_dialog`

    ...
    modparam("script_helper", "use_dialog", 1)
    ...

### `create_dialog_flags` (string)

Flags used when creating dialogs. For details on these flags, please refer to the create_dialog() function of the dialog module.

Default value is "" (no flags are set)

#### Setting `create_dialog_flags`

    ...
    modparam("script_helper", "create_dialog_flags", "PpB")
    ...

### `sequential_route` (string)

Optional route to be run just before sequential requests are relayed. If the exit script statement is used inside this route, the module assumes that the relaying logic has been handled.

By default, this parameter is not set

#### Setting `sequential_route`

    ...
    modparam("script_helper", "sequential_route", "sequential_handling")
    ...
    route [sequential_handling]
    {
    ...
    }
    ...

## Known Issues

The Max-Forwards header is currently not handled at all.