let nblocks = pktbuf.len() / self.block_len;
let out_block_len = self.ainfo.get_block_len();
let duration = out_block_len * nblocks;
let nblocks = pktbuf.len() / self.block_len;
let out_block_len = self.ainfo.get_block_len();
let duration = out_block_len * nblocks;