netdev - How does the linux kernel select the MAC address for TAP devices?

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAPRaSD6_TUBLNJu3GC84FwWmPOqLnhgmoq61mZX03dJFM8cyrw@mail.gmail.com>
Date:	Mon, 16 Jun 2014 10:00:14 +0200
From:	Albert Krenz <albert.krenz87@...glemail.com>
To:	netdev@...r.kernel.org
Subject: How does the linux kernel select the MAC address for TAP devices?

As stated in the email subject: Where does the kernel get the used
MAC-Adress for a newly create TAP device? Are they randomly generated
or does it select one from a fixed pool of reserved MAC-Adresses?

I have not found any official documentation about the selection of
MAC-addresses for TAP-devices. Most sites like
http://backreference.org/2010/03/26/tuntap-interface-tutorial/ state
that the MAC addresses are auto-generated and can be changed. But they
do not explain the generation rules.

Does anyone know an official document (preferably from kernel.org)
explaining the MAC selection process? Or is it only explained in the
Source?
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html