Sebastien Roy wrote:
> Hi Darren,
>
> On Fri, 2008-05-09 at 16:41 +0800, Darren Reed wrote:
>
>> For all that these do, we don't have anything that defines a
>> structure or address family for ethernet - there's no AF_ETHER
>> or AF_802_3 and nor is there a "struct sockaddr_ether".
>>
>
> There is, from <net/if_dl.h>:
>
> /*
> * Structure of a Link-Level sockaddr:
> */
> struct sockaddr_dl {
> ushort_t sdl_family; /* AF_LINK */
> ushort_t sdl_index; /* if != 0, system given index for interface
> */
> uchar_t sdl_type; /* interface type */
> uchar_t sdl_nlen; /* interface name length, no trailing 0 reqd.
> */
> uchar_t sdl_alen; /* link level address length */
> uchar_t sdl_slen; /* link layer selector length */
> char sdl_data[244]; /* contains both if name and ll address */
> };
>
> Here sdl_type is the link type (IFT_ETHER for Ethernet, for example).
> This is also in the various BSDs, so it's a portable construct.
>
> This was designed to do what you're looking for, so I don't think
> there's a need to introduce an Ethernet-specific sockaddr_ether.
>
Yup., you're right, that will do the trick nicely.
Thanks,
Darren
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