dns_cache Module


Table of Contents

1. Admin Guide
1.1. Overview
1.2. Dependencies
1.2.1. OpenSIPS Modules
1.3. Exported Parameters
1.3.1. cachedb_url (string)
1.3.2. blacklist_timeout (int)
1.4. Exported Functions
2. Contributors
2.1. By Commit Statistics
2.2. By Commit Activity
3. Documentation
3.1. Contributors

List of Tables

2.1. Top contributors by DevScore(1), authored commits(2) and lines added/removed(3)
2.2. Most recently active contributors(1) to this module

List of Examples

1.1. Set cachedb_url parameter
1.2. Set blacklist_timeout parameter

Chapter 1. Admin Guide

1.1. Overview

This module is an implementation of a cache system designed for DNS records. For successful DNS queries of all types, the module will store in a cache/db backend the mappings, for TTL number of seconds received in the DNS answer. Failed DNS queries will also be stored in the back-end, with a TTL that can be specified by the user. The module uses the Key-Value interface exported from the core.

1.2. Dependencies

1.2.1. OpenSIPS Modules

A cachedb_* type module must be loaded before loading the dns_cache module.

1.3. Exported Parameters

1.3.1. cachedb_url (string)

The url of the key-value back-end that will be used for storing the DNS records.

Example 1.1. Set cachedb_url parameter

...
#use internal cachedb_local module
modparam("dns_cache", "cachedb_url","local://")
#use cachedb_memcached module with memcached server at 192.168.2.130
modparam("dns_cache", "cachedb_url","memcached://192.168.2.130:8888/")
...
		

1.3.2. blacklist_timeout (int)

The number of seconds that a failed DNS query will be kept in cache. Default is 3600.

Example 1.2. Set blacklist_timeout parameter

...
modparam("dns_cache", "blacklist_timeout",7200) # 2 hours
...
		

1.4. Exported Functions

The module does not export functions to be used in configuration script.

Chapter 2. Contributors

2.1. By Commit Statistics

Table 2.1. Top contributors by DevScore(1), authored commits(2) and lines added/removed(3)

 NameDevScoreCommitsLines ++Lines --
1. Vlad Paiu (@vladpaiu)15510063
2. Liviu Chircu (@liviuchircu)12104644
3. Razvan Crainea (@razvancrainea)1191214
4. Bogdan-Andrei Iancu (@bogdan-iancu)86167
5. Peter Lemenkov (@lemenkov)3111
6. Vlad Patrascu (@rvlad-patrascu)2110

(1) DevScore = author_commits + author_lines_added / (project_lines_added / project_commits) + author_lines_deleted / (project_lines_deleted / project_commits)

(2) including any documentation-related commits, excluding merge commits. Regarding imported patches/code, we do our best to count the work on behalf of the proper owner, as per the "fix_authors" and "mod_renames" arrays in opensips/doc/build-contrib.sh. If you identify any patches/commits which do not get properly attributed to you, please submit a pull request which extends "fix_authors" and/or "mod_renames".

(3) ignoring whitespace edits, renamed files and auto-generated files

2.2. By Commit Activity

Table 2.2. Most recently active contributors(1) to this module

 NameCommit Activity
1. Bogdan-Andrei Iancu (@bogdan-iancu)Jun 2012 - Mar 2020
2. Razvan Crainea (@razvancrainea)Feb 2012 - Sep 2019
3. Peter Lemenkov (@lemenkov)Jun 2018 - Jun 2018
4. Liviu Chircu (@liviuchircu)Mar 2014 - Jun 2018
5. Vlad Patrascu (@rvlad-patrascu)May 2017 - May 2017
6. Vlad Paiu (@vladpaiu)Feb 2012 - Oct 2012

(1) including any documentation-related commits, excluding merge commits

Chapter 3. Documentation

3.1. Contributors

Last edited by: Razvan Crainea (@razvancrainea), Peter Lemenkov (@lemenkov), Liviu Chircu (@liviuchircu), Bogdan-Andrei Iancu (@bogdan-iancu), Vlad Paiu (@vladpaiu).

Documentation Copyrights:

Copyright © 2012 www.opensips-solutions.com