36         let mut bits = self.op_code << 11 | self.rcode as u16;  in pack()  localVariable
38             bits |= HEADER_BIT_RA  in pack()
41             bits |= HEADER_BIT_RD  in pack()
44             bits |= HEADER_BIT_TC  in pack()
47             bits |= HEADER_BIT_AA  in pack()
50             bits |= HEADER_BIT_QR  in pack()
53         (id, bits)  in pack()
102     pub bits: u16,  field
123         msg = pack_uint16(msg, self.bits);  in pack()
135         let (bits, off) = unpack_uint16(msg, off)?;  in unpack()
136         self.bits = bits;  in unpack()
156             response: (self.bits & HEADER_BIT_QR) != 0,  in header()
157             op_code: ((self.bits >> 11) & 0xF) as OpCode,  in header()
158             authoritative: (self.bits & HEADER_BIT_AA) != 0,  in header()
159             truncated: (self.bits & HEADER_BIT_TC) != 0,  in header()
160             recursion_desired: (self.bits & HEADER_BIT_RD) != 0,  in header()
161             recursion_available: (self.bits & HEADER_BIT_RA) != 0,  in header()
162             rcode: RCode::from((self.bits & 0xF) as u8),  in header()