TCHECK
TCHECK(bp->bp_chaddr[0], 6);
TCHECK(bp->bp_ciaddr, sizeof(bp->bp_ciaddr));
TCHECK(bp->bp_yiaddr, sizeof(bp->bp_yiaddr));
TCHECK(bp->bp_siaddr, sizeof(bp->bp_siaddr));
TCHECK(bp->bp_giaddr, sizeof(bp->bp_giaddr));
TCHECK(bp->bp_sname[0], sizeof(bp->bp_sname));
TCHECK(bp->bp_file[0], sizeof(bp->bp_file));
TCHECK(bp->bp_vend[0], vdlen);