int
main(int argc, char **argv)
{
if (argc != 2)
err_quit("usage: prifname <interface-name>");
printf("interface index = %d\n", If_nametoindex(argv[1]));
exit(0);
}
int
main(int argc, char **argv)
{
int n;
char ifname[IFNAMSIZ];
struct if_nameindex *ifptr, *save;
if (argc != 1)
err_quit("usage: prifnameindex");
/* print all the interface names and indexes */
for (save = ifptr = If_nameindex(); ifptr->if_index > 0; ifptr++) {
printf("name = %s, index = %d\n", ifptr->if_name, ifptr->if_index);;
if ( (n = If_nametoindex(ifptr->if_name)) != ifptr->if_index)
err_quit("if_nametoindex returned %d, expected %d, for %s",
n, ifptr->if_index, ifptr->if_name);
If_indextoname(ifptr->if_index, ifname);
if (strcmp(ifname, ifptr->if_name) != 0)
err_quit("if_indextoname returned %s, expected %s, for %d",
ifname, ifptr->if_name, ifptr->if_index);
}
n = if_nametoindex("fkjhkjhgjhgjhgdjhguyetiuyiuyhkjhkjdh");
if (n != 0)
err_quit("if_nametoindex returned %d for fkjh...", n);
n = if_nametoindex("");
if (n != 0)
err_quit("if_nametoindex returned %d for (null)", n);
if (if_indextoname(0, ifname) != NULL)
err_quit("if_indextoname error for 0");
if (if_indextoname(888888, ifname) != NULL)
err_quit("if_indextoname error for 888888");
if_freenameindex(save);
exit(0);
}
