tcpdump mailing list archives
Re: Obtaining MAC on OSX using AF_LINK
From: Guy Harris <guy () alum mit edu>
Date: Sun, 2 Jan 2011 14:55:33 -0800
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 }; - This is the tcpdump-workers list. Visit https://cod.sandelman.ca/ to unsubscribe.
Current thread:
- Re: Obtaining MAC on OSX using AF_LINK Guy Harris (Jan 02)
- Re: Obtaining MAC on OSX using AF_LINK Guy Harris (Jan 02)