Kemp@dockmaster.ncsc.mil (05/03/89)
Dan Ehrlich <ehrlich@shire.cs.psu.edu> writes: Does anyone know how to
determine the ethernet address of the second ethernet interface on a Sun?
There is a program in the Sun Software Technical Bulletin (November 1988,
page 2202) that does exactly that, using /dev/nit. The code is 1 1/2
pages, but the relevant lines are (omitting error checking):
#include <net/if.h>
#include <net/nit_if.h>
struct ifreq if_data;
sfd = open("/dev/nit", O_RDONLY);
if_data.ifr_addr.sa_family = AF_NIT;
strcpy(if_data.ifr_name, argv[1]);l /* the interface name */
ioctl(sfd, NIOCBIND, &if_data);
ioctl(sfd, SIOCGIFADDR, &if_data); /* Get the ethernet addr */
/* print if_data.ifr_addr.sa_data[0:5] */
I typed the program in and it works. If you don't get the STB, the
above should be enough to get you pointed in the right direction.
Dave Kemp <Kemp@dockmaster.ncsc.mil>