mblk_write16
mblk_write16(mp,
mblk_write16(mp, hck_stuff, 0);
mblk_write16(mp, hck_stuff + 2, 0);
mblk_write16(mp, hck_stuff, pcksum);
mblk_write16(mp, hck_stuff, 0);
mblk_write16(mp, hck_stuff, 0);