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use std::io; use ser::{ Serializable, Stream, Deserializable, Reader, Error as ReaderError, }; use common::NetAddress; use {Payload, MessageResult}; #[derive(Debug, PartialEq)] pub enum Addr { V0(V0), V31402(V31402), } impl Addr { pub fn new(addresses: Vec<AddressEntry>) -> Self { Addr::V31402(V31402 { addresses: addresses, }) } } impl Payload for Addr { fn version() -> u32 { 0 } fn command() -> &'static str { "addr" } fn deserialize_payload<T>(reader: &mut Reader<T>, version: u32) -> MessageResult<Self> where T: io::Read { let result = if version < 31402 { reader.read().map(Addr::V0) } else { reader.read().map(Addr::V31402) }; result.map_err(Into::into) } fn serialize_payload(&self, stream: &mut Stream, version: u32) -> MessageResult<()> { match *self { Addr::V0(ref addr) => addr.serialize(stream), Addr::V31402(ref addr) => { if version < 31402 { let view = V31402AsV0::new(addr); view.serialize(stream); } else { addr.serialize(stream); } } } Ok(()) } } #[derive(Debug, PartialEq)] pub struct AddressEntry { pub timestamp: u32, pub address: NetAddress, } impl Serializable for AddressEntry { fn serialize(&self, stream: &mut Stream) { stream .append(&self.timestamp) .append(&self.address); } } impl Deserializable for AddressEntry { fn deserialize<T>(reader: &mut Reader<T>) -> Result<Self, ReaderError> where T: io::Read { let entry = AddressEntry { timestamp: try!(reader.read()), address: try!(reader.read()), }; Ok(entry) } } #[derive(Debug, PartialEq)] pub struct V31402 { pub addresses: Vec<AddressEntry>, } impl Serializable for V31402 { fn serialize(&self, stream: &mut Stream) { stream.append_list(&self.addresses); } } impl Deserializable for V31402 { fn deserialize<T>(reader: &mut Reader<T>) -> Result<Self, ReaderError> where T: io::Read { let result = V31402 { addresses: try!(reader.read_list_max(1000)), }; Ok(result) } } #[derive(Debug, PartialEq)] pub struct V0 { pub addresses: Vec<NetAddress>, } impl Serializable for V0 { fn serialize(&self, stream: &mut Stream) { stream.append_list(&self.addresses); } } impl Deserializable for V0 { fn deserialize<T>(reader: &mut Reader<T>) -> Result<Self, ReaderError> where T: io::Read { let result = V0 { addresses: try!(reader.read_list_max(1000)), }; Ok(result) } } struct V31402AsV0<'a> { v: &'a V31402, } impl<'a> V31402AsV0<'a> { fn new(v: &'a V31402) -> Self { V31402AsV0 { v: v, } } } impl<'a> Serializable for V31402AsV0<'a> { fn serialize(&self, stream: &mut Stream) { let vec_ref: Vec<&'a NetAddress> = self.v.addresses.iter().map(|x| &x.address).collect(); stream.append_list::<NetAddress, &'a NetAddress>(&vec_ref); } } #[cfg(test)] mod tests { use bytes::Bytes; use ser::{serialize, deserialize}; use super::{V31402, AddressEntry}; #[test] fn test_addr_serialize() { let expected: Bytes = "01e215104d010000000000000000000000000000000000ffff0a000001208d".into(); let addr = V31402 { addresses: vec![ AddressEntry { timestamp: 0x4d1015e2, address: "010000000000000000000000000000000000ffff0a000001208d".into(), }, ], }; assert_eq!(serialize(&addr), expected); } #[test] fn test_addr_deserialize() { let raw: Bytes = "01e215104d010000000000000000000000000000000000ffff0a000001208d".into(); let expected = V31402 { addresses: vec![ AddressEntry { timestamp: 0x4d1015e2, address: "010000000000000000000000000000000000ffff0a000001208d".into(), }, ], }; assert_eq!(expected, deserialize(raw.as_ref()).unwrap()); } }