xHTTP_PI Module

Ovidiu Sas

Edited by

Ovidiu Sas

Table of Contents

1. Admin Guide
1. Overview
2. Usage
3. Framework
3.1. Database connection definition block
3.2. Table definition block
3.3. Command definition block
4. To-do
5. Dependencies
5.1. Kamailio Modules
5.2. External Libraries or Applications
6. Parameters
6.1. xhttp_pi_root (str)
6.2. xhttp_pi_buf_size (int)
6.3. framework (string)
7. Functions
7.1. dispatch_xhttp_pi()
8. RPC Commands
8.1. xhttp_pi.reload

List of Examples

1.1. Set xhttp_pi_root parameter
1.2. Set xhttp_pi_buf_size parameter
1.3. Set framework parameter
1.4. dispatch_xhttp_pi usage

Chapter 1. Admin Guide

1. Overview

This module provides a web provisioning interface for Kamailio. It is using the Kamailio's internal database API to provide a simple way of manipulating records inside Kamailio's tables.

The module offers:

  • ability to connect to multiple/different databases through Kamailio's db API; (all Kamailio's databases are supported);

  • ability to perform data input validation through Kamailio API;

  • ability to reconfigure the interface layout on the fly by reloading the config from the xml framework via the rpc command interface.

Note: when provisioning tables using db_text, any change made to a db_text table will not be reflected on the actual text file. In order to force a write out to the disk of the cached tables, the db_text rpc command db_text.dump must be used.

2. Usage

The layout of the provisioning interface is controlled via an external xml file (see the framework parameter). An example of a framework xml file is provided inside the Kamailio's examples directory. A simple framework file can be generated by the kamdbctl command:

kamdbctl pframework create

The generated framework will be saved inside Kamailio's config directory as pi_framework_sample. The list of configurable tables will be based on the STANDARD_MODULES and EXTRA_MODULES vars from kamctlrc file. The sample framework file will provide the ability to inspect tables. In order to add/modify/remove records to/from tables, new commands must be added by the admin.

3. Framework

The xml framework file is organized in three distinctive blocks:

  • database connection definition block

  • table definition block

  • command definition block

3.1. Database connection definition block

Each connection to a particular database must be defined here with a unique database connection id. The connection parameters are defined following the db_url param pattern for all Kamailio modules that are using a database.

Supported databases:

  • berkeley

  • cassandra

  • cluster

  • flatstore

  • mysql

  • oracle

  • postgres

  • sqlite

  • text

  • unixodbc

3.2. Table definition block

Each table managed through the Kamailio provisioning interface must be defined here with a unique table id. For each table, the database connection id must be specified. Each table must list all columns that will be managed by the Kamailio provisioning interface. Each column must have a unique field name and a type. Each column may have a validation tag for validating input data.

Supported column types:

  • DB1_INT




  • DB1_STR


    • Note: input field must be provided in 'YEAR-MM-DD HH:MM:SS' format.

  • DB1_BLOB


Supported validation methods:

  • IPV4 - represents an IPv4 address

  • URI - represents a SIP URI

  • URI_IPV4HOST - represents a SIP URI with an IPV4 as a host

  • P_HOST_PORT - represents [proto:]host[:port]

  • P_IPV4_PORT - represents [proto:]IPv4[:port]

3.3. Command definition block

Multiple provisioning commands can be grouped together. Each group can have multiple commands. Each command definition in a group must have the table id of the table that is operating on along with the command type to be performed.

The command type can have up to three type of column parameters:

  • clause columns

  • query columns

  • order by columns

Each column parameter must define the name(s) of the column(s) (must match a field name in the description table identified by the table id). A column can accept a list of imposed values. Each imposed value will have an id that will be displayed on the web interface and the actual value that will be used for db operations. Clause columns must define operators. Here's the list of supported operators: '<', '>', '=', '<=', '>=', '!='.

Supported database command types:

  • DB1_QUERY - performs an SQL query and supports three type of columns:

    • clause: 0 or more columns

    • query: 1 column

    • order: 0 or 1 column

  • DB1_INSERT - performs an SQL insert and supports one type of column:

    • query: 1 or more columns

  • DB1_DELETE - performs an SQL delete and supports one type of column:

    • clause: 1 or more columns

  • DB1_UPDATE - performs an SQL update and supports two type of columns:

    • clause: 0 or more columns

    • query: 1 or more columns

  • DB1_REPLACE - performs an SQL replace and supports one type of column:

    • query: 1 or more columns

Please note that some databases have a restricted set of database command types.

4. To-do

Features to be added in the future:

  • full subscriber provisioning with automatic ha1/ha1b fields.

5. Dependencies

5.1. Kamailio Modules

The following modules must be loaded before this module:

  • xhttp - xHTTP.

5.2. External Libraries or Applications

The following libraries or applications must be installed before running Kamailio with this module loaded:

  • libxml2

6. Parameters

6.1. xhttp_pi_root (str)

It specifies the root path for provisioning http requests. The link to the provisioning web interface must be constructed using the following pattern: http://[server_IP]:[tcp_port]/[xhttp_pi_root]

Default value is "pi".

Example 1.1. Set xhttp_pi_root parameter

modparam("xhttp_pi", "xhttp_pi_root", "pi")

6.2. xhttp_pi_buf_size (int)

It specifies the maximum length of the buffer (in bytes) used to write in the HTML reply information in order to build the HTML response.

Default value is 0 (auto set to 1/3 of the size of the configured pkg mem).

Example 1.2. Set xhttp_pi_buf_size parameter

modparam("xhttp_pi", "xhttp_pi_buf_size", 1024)

6.3. framework (string)

It specifies the full path for xml framework descriptor.

There's no default value. This parameter is mandatory.

Example 1.3. Set framework parameter

modparam("xhttp_pi", "framework", "/usr/local/etc/kamailio/pi_framework.xml")

7. Functions

7.1.  dispatch_xhttp_pi()

Handle the HTTP request and generate a response.

Example 1.4. dispatch_xhttp_pi usage

loadmodule "sl.so"
loadmodule "xhttp.so"
loadmodule "xhttp_pi.so"
modparam("xhttp_pi", "framework", "/usr/local/etc/kamailio/pi_framework.xml")
event_route[xhttp:request] {
	$var(xhttp_root) = $(hu{s.substr,0,3});
	if ($var(xhttp_root) == "/pi")
		xhttp_reply("200", "OK", "text/html",
				"<html><body>Wrong URL $hu</body></html>");

8. RPC Commands

8.1.  xhttp_pi.reload

Reloads the xml framework.

Name: xhttp_pi.reload

Parameters: none

RPC Command Format:

		kamctl xhttp_pi.reload