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Re: Is tun(4) a cloning device?

In article <>,
Robert Elz  <kre%munnari.OZ.AU@localhost> wrote:
>    Date:        Fri, 25 Dec 2015 00:20:56 +0100
>    From:        Rhialto <>
>    Message-ID:  <>
>  | Grom reading the source, net/if_tun.c, I get the impression that tun is
>  | a cloning device. Like tap. 
>It is a cloning device, but not quite like tap.
>It is a cloning device, in the sense that there is no magic number of
>tunnel devices configured into the kernel, which you cannot exceed at
>run time - if you want tap999 just ifconfig it (ifconfig tun999 create)
>and it exists.   This is how most cloning pseudo-devices work, and it
>means that when you use it, you know in advance which interface number
>you're getting (you choose).
>However, it does not have the magic minor device that creates a new
>interface every time it is opened (the /dev/tap equivalent).

Exactly, it depends if it makes sense to have a magic minor device like
that... Does it?


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