dl_print
int l = dl_print(buf + 1, len, &sdl->sdl_addr);
int dl_print(char *, size_t, const struct dl_addr *);
#define DL_PRINT(b, a) (dl_print((b), sizeof(b), (a)), (b))
ATF_TC(dl_print);
ATF_TC_HEAD(dl_print, tc)
ATF_TC_BODY(dl_print, tc)
r = dl_print(buf, l, &tst[i].ia);
r = dl_print(buf, l, &tst[i].ia);
ATF_TP_ADD_TC(tp, dl_print);