Strange behaviour with interface name

Strange behaviour with interface name

[Nicholas Joll]

Dear all

A conf file called

     wireguard-se1gb1.conf

generates, via the wq-quick command, an interface named thusly (note the
missing the initial 'w'):

     ireguard-se1gb1.conf [sic]

Nonetheless, the interface - which works - can be pulled down with

     wg-quick down wireguard-se1gb1.conf

(note the 'w' at the start of 'wireguard'). Renaming the conf file to

     wireguard-seGb.conf

generates an interface that is named as expected.


Wireguard: 0.0.20180118-wg1~xenial
OS: Linux Mint 18.3 Sylvia x86_64
Kernel: 4.15.1-041501-generic

Yours,

Nick

Re: Strange behaviour with interface name

[Matthias Ordner]

[-- Attachment #1: Type: text/plain, Size: 911 bytes --]

Hi Nicholas,

> A conf file called
> 
>       wireguard-se1gb1.conf
> 
> generates, via the wq-quick command, an interface named thusly (note the
> missing the initial 'w'):
> 
>       ireguard-se1gb1.conf [sic]

Interface name length on Linux is limited to 15 chars.
So this is most likely caused by this commit:
https://git.zx2c4.com/WireGuard/commit/?id=b4d5801a16f8619bc3a6111a2a6bd049abd149a3

Using shorter config file names avoids this "bug".

Best regards

Matthias

 
Matthias Ordner
Network & Security (ONS) 
noris network AG
Thomas-Mann-Straße 16-20
90471 Nürnberg
Deutschland
Tel +49 911 9352 1325
Fax +49 911 9352 100

matthias.ordner@noris.de
https://www.noris.de - Mehr Leistung als Standard
Vorstand: Ingo Kraupa (Vorsitzender), Joachim Astel, Jürgen Städing
Vorsitzender des Aufsichtsrats: Stefan Schnabel - AG Nürnberg HRB 17689
 
 
 
 

[-- Attachment #2: smime.p7s --]
[-- Type: application/x-pkcs7-signature, Size: 6394 bytes --]

Re: Strange behaviour with interface name

[Jason A. Donenfeld]

Hi Nick,

Thanks for the bug report. Fixed here:

https://git.zx2c4.com/WireGuard/commit/?id=dd85f27b6ec98de1527a935a7f0930c2111d7930

Jason