u_word
(2*sizeof(u_int8_t)+sizeof(u_int16_t)+sizeof(u_word)))
u_word rmp_seqno; /* sequence number (real time clock) */
u_word rmp_seqno; /* sequence number (from boot req) */
u_word rmp_offset; /* file relative byte offset */
u_word rmp_offset; /* byte offset (from read req) */
u_word rmp_unused; /* not used (0) */