let table_bits = ((self.pkt_buf[0] as usize) << 8) | (self.pkt_buf[1] as usize);
let table_bytes = (table_bits + 7) >> 3;
validate!(src_len > table_bytes + 3);
let table_bits = ((self.pkt_buf[0] as usize) << 8) | (self.pkt_buf[1] as usize);
let table_bytes = (table_bits + 7) >> 3;
validate!(src_len > table_bytes + 3);