On Jan 2, 2011, at 2:33 PM, Guy Harris wrote:
>> It seems that the pacap_addr.sa_data should be of type (struct sockaddr_dl*)
>
> Yes.
As per later in my message, that's actually "No"; I missed the "sa_data" part.
*addr* should be cast to something of type (struct sockaddr_dl *); sa_data in a
"struct sockaddr" corresponds to the stuff starting at sdl_index in
struct sockaddr_dl {
u_char sdl_len; /* Total length of sockaddr */
u_char sdl_family; /* AF_LINK */
u_short sdl_index; /* if != 0, system given index for interface */
u_char sdl_type; /* interface type */
u_char sdl_nlen; /* interface name length, no trailing 0 reqd. */
u_char sdl_alen; /* link level address length */
u_char sdl_slen; /* link layer selector length */
char sdl_data[12]; /* minimum work area, can be larger;
contains both if name and ll address */
#ifndef __APPLE__
/* For TokenRing */
u_short sdl_rcf; /* source routing control */
u_short sdl_route[16]; /* source routing information */
#endif
};
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