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Subject: Re: Interface friendly names for AF_INET6
To: cygwin AT cygwin DOT com
References: <56E15638 DOT 5080906 AT gmail DOT com> <20160310140329 DOT GD27354 AT calimero DOT vinschen DOT de>
From: Marco Atzeri <marco DOT atzeri AT gmail DOT com>
Message-ID: <56E1861E.70007@gmail.com>
Date: Thu, 10 Mar 2016 15:35:10 +0100
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On 10/03/2016 15:03, Corinna Vinschen wrote:
> On Mar 10 12:10, Marco Atzeri wrote:
>> I am trying to put a small interface info tool
>> to debug some hangs reported on openmpi.
>>
>> The aim is to produce something like
>>
>> {9F4F7FD2-5E44-4796-ABE0-0785CF76C11E} AF_INET6 (23)
>>          flags: up running multicast
>>          address: <fe80::9953:b1f5:a643:4497%15>
>>          Local Area Connection
>> {9F4F7FD2-5E44-4796-ABE0-0785CF76C11E} AF_INET (2)
>>          flags: up broadcast running multicast
>>          address: <172.21.188.188>
>>          Local Area Connection
>>
>> I am using getifaddrs to obtain all the AF_INET and AF_INET6
>> interface, however I can only obtain the friendly name of the
>> AF_INET using
>>    ioctl(sock, SIOCGIFFRNDLYNAM
>>
>> On my pc I see 20 interface, 10 for each type, however
>> only 7 couples shares the same "ifa_name" the others
>> 3+3 shows different ones.
>
> Btw., don't use the friendly names to distinguish interfaces.  Only the
> real, GUID-like interface name is a valid, unique identifier under
> Windows.
>
>
> Corinna


That I know, however If I should advise a user to disable by control 
panel a virtual interface I can not use the

   {9F4F7FD2-5E44-4796-ABE0-0785CF76C11E}
but
   "Local Area Connection"
should work ...


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