Date: Fri, 20 Oct 2023 23:36:23 +0200 From: Ede Wolf <listac@nebelschwaden.de> To: Paul Procacci <pprocacci@gmail.com> Cc: Freebsd-questions@freebsd.org Subject: Re: limit of network interface name length? Message-ID: <3b2c44f1-2b5b-482f-972b-5a273203db9b@nebelschwaden.de> In-Reply-To: <CAFbbPugTX%2B8ouxk7_xxCJ9QouPJTdfWnLE-QXQTNyxMdWwj8zQ@mail.gmail.com> References: <827d9e2e-5416-42ca-9ee1-dde398a23b21@nebelschwaden.de> <CAFbbPugTX%2B8ouxk7_xxCJ9QouPJTdfWnLE-QXQTNyxMdWwj8zQ@mail.gmail.com>
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Thanks very much!
Am 20.10.23 um 22:56 schrieb Paul Procacci:
>
>
> On Fri, Oct 20, 2023 at 4:31 PM Ede Wolf <listac@nebelschwaden.de
> <mailto:listac@nebelschwaden.de>> wrote:
>
> Hello,
>
> I am trying to rename a couple of interfaces, and it works for some,
> for
> others not.
>
> Trying to find what I may be doing wrong, a patter that seems to
> emerge,
> is, that if names longer than 14Bytes are not supported. Maybe the "
> make up for the missing bytes up to 16.
>
> F.e.:
>
> ifconfig_epair6a_name="jail_template_local"
>
> does not work. The interface names remaines epair6a.
> Is that documented anywhere?
>
> Or can anyone confirm this limit on solid grounds? Just to make sure I
> have not done anything other wrong.
>
> Thanks
>
> Ede
>
>
> It's defined as 16 bytes.
>
> "/*
> * Length of interface external name, including terminating '\0'.
> * Note: this is the same size as a generic device's external name.
> */
> #define IF_NAMESIZE 16
> #if __BSD_VISIBLE
> #define IFNAMSIZ IF_NAMESIZE"
>
> ~Paul
>
> --
> __________________
>
> :(){ :|:& };:
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