Re: Patch to implement SIOCGIFINDEX

[Masaru OKI <masaru+oki%chocot.jp@localhost>]

FreeBSD already has SIOCGIFINDEX, and if_nametoindex(3) uses it.
it is useful, i think.

(2013/04/02 8:13), Ty Sarna wrote:
> The following short patch implements SIOCGIFINDEX as found on Linux
> (and maybe elsewhere), which translates an interface name to its index.
>
> Index: net/if.c
> ===================================================================
> RCS file: /cvsroot/src/sys/net/if.c,v
> retrieving revision 1.262
> diff -u -r1.262 if.c
> --- net/if.c    10 Mar 2013 19:46:12 -0000      1.262
> +++ net/if.c    1 Apr 2013 23:03:29 -0000
> @@ -1613,6 +1613,11 @@
>                 ifdr->ifdr_data = ifp->if_data;
>                 break;
>
> +       case SIOCGIFINDEX:
> +               ifr = data;
> +               ifr->ifr_ifindex = ifp->if_index;
> +               break;
> +
>         case SIOCZIFDATA:
>                 ifdr = data;
>                 ifdr->ifdr_data = ifp->if_data;
> Index: net/if.h
> ===================================================================
> RCS file: /cvsroot/src/sys/net/if.h,v
> retrieving revision 1.155
> diff -u -r1.155 if.h
> --- net/if.h    25 Oct 2012 11:53:14 -0000      1.155
> +++ net/if.h    1 Apr 2013 23:03:30 -0000
> @@ -598,6 +598,7 @@
>                                                  */
>   #define       ifr_buf         ifr_ifru.ifru_b.b_buf   /* new interface ioctls 
> */
>   #define       ifr_buflen      ifr_ifru.ifru_b.b_buflen
> +#define        ifr_ifindex     ifr_ifru.ifru_value     /* interface index */
>   };
>
>   #ifdef _KERNEL
> Index: sys/sockio.h
> ===================================================================
> RCS file: /cvsroot/src/sys/sys/sockio.h,v
> retrieving revision 1.31
> diff -u -r1.31 sockio.h
> --- sys/sockio.h        31 Oct 2012 10:17:35 -0000      1.31
> +++ sys/sockio.h        1 Apr 2013 23:03:30 -0000
> @@ -137,6 +137,8 @@
>
>   #define       SIOCGETHERCAP   _IOWR('i', 139, struct eccapreq) /* get 
> ethercap */
>
> +#define        SIOCGIFINDEX    _IOWR('i', 140, struct ifreq)   /* get ifnet 
> index */
> +
>   #define       SIOCSETPFSYNC   _IOW('i', 247, struct ifreq)    
>   #define       SIOCGETPFSYNC   _IOWR('i', 248, struct ifreq)