23 lines
1.2 KiB
Text
23 lines
1.2 KiB
Text
The Institute of Electrical and Electronics Engineers (IEEE) assigns an
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Organizational Unique Identifier (OUI) to manufacturers of network
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interfaces. Each interface has a Media Access Control (MAC) address of six
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bytes. The first three bytes are the OUI.
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This module allows you to take a MAC address and turn it into the OUI and
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vendor information. You can, for instance, scan a network, collect MAC
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addresses, and turn those addresses into vendors. With vendor information,
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you can often guess at what you are looking at (e.g. an Apple
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product).
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You can use this as a module as its individual functions, or call it as a
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script with a list of MAC addresses as arguments. The module can figure it
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out.
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This module tries to persistently cache with DBM::Deep the OUI information
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so it can avoid using the network. If it cannot load DBM::Deep, it uses a
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normal hash (which is lost when the process finishes). You can preload
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this cache with the load_cache() function. So far, the module looks in the
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current working directory for a file named mac_oui.db to find the cache. I
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need to come up with a way to let the user set that location.
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WWW: http://search.cpan.org/dist/Net-MAC-Vendor/
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