req_ack_offset
orig_offset = ext_msg.req_ack_offset;
offset = ext_msg.req_ack_offset;
ext_msg.req_ack_offset = offset;
ext_msg.req_ack_offset,
if (orig_offset != ext_msg.req_ack_offset)
ext_msg.req_ack_offset);
sdtr_buf.req_ack_offset = sdtr_offset;