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Re: Interface friendly names for AF_INET6

On 10/03/2016 14:49, Corinna Vinschen wrote:
On Mar 10 14:32, Corinna Vinschen wrote:
Hi Marco,

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

getifaddrs should return the friendly name.  Strruct ifall
has a member ifa_frndlyname, type struct ifreq_frndlyname,
which is filled for AF_INET and AF_INET6 interfaces.

Oh, I see.  The friendlyname is there, but struct ifaddrs is missing a
pointer to it.  That's the confusion you get when reusing the same
function and structure type for multiple APIs.

This could be easily rectified by utilizing the ifa_data pointer which
is unused so far.  It could point to a structure pointing to the other
values collected but not yet exposed by getifaddrs, e.g.:

   struct ifall_data
     struct sockaddr         ifa_hwaddr;
     int                     ifa_metric;
     int                     ifa_mtu;
     int                     ifa_ifindex;
     struct ifreq_frndlyname ifa_frndlyname;

   ifa_data = pointer to ifall_data;

Would that help to get this into Cygwin 2.5.0?


I assume the ifall structures are not visible outside cygwin internal, correct ?

If so a ifall_data pointer should cover my current trial.


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