FusionInventory agent NetDiscovery task
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Description 
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This tasks allows the agent to scans the network to find connected devices:
- devices discovery within an IP range, through nmap, NetBios or SNMP
- devices identification, through SNMP

NetDiscovery use the following tools, if available, to scan IP networks:
- nmap external command
- Net::NBName perl module
- Net::SNMP perl module
This allow to discover connected devices, with a few additional information,
such as mac address and hostname, but not to identify them.

If the device replies to SNMP, tough, an additional identification attempt is
performed, by comparing its sysdescr field with a database of known values. If 
there is an exact match, an SNMP description model can be assigned, allowing to
immediatly identify the device category (printer, network device, etc...), and
to use NetInventory task later to fetch additional informations.

Wether identified or not, discovered devices are reported to GLPI as 'unknown
device', and have to be imported in the inventory.

Dependencies
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This task requires a FusionInventory agent (minimal version 2.2.0), and can
only be executed with a GLPI server with FusionInventory plugin.

Additional optional perl modules:
- Net::SNMP
- Net::NBName

Additional optional programs:
- nmap

Authors 
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* David Durieux <[email protected]>
* Gonéri Le Bouder
* Guillaume Rousse <[email protected]>

Copyright 2010-2012 FusionInventory Team

License
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This software is licensed under the terms of GPLv2+, see LICENSE file for
details.