989 lines
28 KiB
Rust
989 lines
28 KiB
Rust
// Copyright 2016 Matthew Collins
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#![allow(dead_code)]
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use openssl;
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use serde_json;
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use hyper;
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pub mod mojang;
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use nbt;
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use format;
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use std::fmt;
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use std::default;
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use std::net::TcpStream;
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use std::io;
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use std::io::{Write, Read};
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use std::convert;
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use byteorder::{BigEndian, WriteBytesExt, ReadBytesExt};
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use flate2::read::{ZlibDecoder, ZlibEncoder};
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use flate2;
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use time;
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use shared::Position;
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pub const SUPPORTED_PROTOCOL: i32 = 109;
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/// Helper macro for defining packets
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#[macro_export]
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macro_rules! state_packets {
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($($state:ident $stateName:ident {
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$($dir:ident $dirName:ident {
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$(
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$name:ident {
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$($field:ident: $field_type:ty = $(when ($cond:expr))*, )+
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})*
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})+
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})+) => {
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use protocol::*;
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use std::io;
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#[derive(Debug)]
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pub enum Packet {
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$(
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$(
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$(
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$name($state::$dir::$name),
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)*
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)+
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)+
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}
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$(
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pub mod $state {
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$(
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pub mod $dir {
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#![allow(unused_imports)]
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use protocol::*;
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use std::io;
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use format;
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use nbt;
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use types;
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use item;
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use shared::Position;
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pub mod internal_ids {
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create_ids!(i32, $($name),*);
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}
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$(
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#[derive(Default, Debug)]
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pub struct $name {
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$(pub $field: $field_type),+,
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}
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impl PacketType for $name {
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fn packet_id(&self) -> i32 { internal_ids::$name }
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fn write(self, buf: &mut io::Write) -> Result<(), io::Error> {
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$(
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if true $(&& ($cond(&self)))* {
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try!(self.$field.write_to(buf));
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}
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)+
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Result::Ok(())
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}
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}
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)*
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}
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)+
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}
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)+
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/// Returns the packet for the given state, direction and id after parsing the fields
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/// from the buffer.
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pub fn packet_by_id(state: State, dir: Direction, id: i32, mut buf: &mut io::Read) -> Result<Option<Packet>, io::Error> {
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match state {
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$(
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State::$stateName => {
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match dir {
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$(
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Direction::$dirName => {
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match id {
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$(
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self::$state::$dir::internal_ids::$name => {
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use self::$state::$dir::$name;
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let mut packet : $name = $name::default();
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$(
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if true $(&& ($cond(&packet)))* {
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packet.$field = try!(Serializable::read_from(&mut buf));
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}
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)+
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Result::Ok(Option::Some(Packet::$name(packet)))
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},
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)*
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_ => Result::Ok(Option::None)
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}
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}
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)+
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}
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}
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)+
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}
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}
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}
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}
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pub mod packet;
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pub trait Serializable: Sized {
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fn read_from(buf: &mut io::Read) -> Result<Self, io::Error>;
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fn write_to(&self, buf: &mut io::Write) -> Result<(), io::Error>;
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}
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impl Serializable for Vec<u8> {
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fn read_from(buf: &mut io::Read) -> Result<Vec<u8>, io::Error> {
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let mut v = Vec::new();
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try!(buf.read_to_end(&mut v));
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Ok(v)
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}
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fn write_to(&self, buf: &mut io::Write) -> Result<(), io::Error> {
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buf.write_all(&self[..])
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}
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}
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impl Serializable for Option<nbt::NamedTag>{
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fn read_from(buf: &mut io::Read) -> Result<Option<nbt::NamedTag>, io::Error> {
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let ty = try!(buf.read_u8());
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if ty == 0 {
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Result::Ok(None)
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} else {
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let name = try!(nbt::read_string(buf));
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let tag = try!(nbt::Tag::read_from(buf));
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Result::Ok(Some(nbt::NamedTag(name, tag)))
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}
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}
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fn write_to(&self, buf: &mut io::Write) -> Result<(), io::Error> {
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match *self {
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Some(ref val) => {
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try!(buf.write_u8(10));
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try!(nbt::write_string(buf, &val.0));
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try!(val.1.write_to(buf));
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}
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None => try!(buf.write_u8(0)),
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}
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Result::Ok(())
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}
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}
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impl <T> Serializable for Option<T> where T : Serializable {
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fn read_from(buf: &mut io::Read) -> Result<Option<T>, io::Error> {
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Result::Ok(Some(try!(T::read_from(buf))))
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}
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fn write_to(&self, buf: &mut io::Write) -> Result<(), io::Error> {
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if self.is_some() {
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try!(self.as_ref().unwrap().write_to(buf));
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}
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Result::Ok(())
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}
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}
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impl Serializable for String {
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fn read_from(buf: &mut io::Read) -> Result<String, io::Error> {
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let len = try!(VarInt::read_from(buf)).0;
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let mut ret = String::new();
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try!(buf.take(len as u64).read_to_string(&mut ret));
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Result::Ok(ret)
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}
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fn write_to(&self, buf: &mut io::Write) -> Result<(), io::Error> {
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let bytes = self.as_bytes();
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try!(VarInt(bytes.len() as i32).write_to(buf));
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try!(buf.write_all(bytes));
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Result::Ok(())
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}
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}
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impl Serializable for format::Component {
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fn read_from(buf: &mut io::Read) -> Result<Self, io::Error> {
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let len = try!(VarInt::read_from(buf)).0;
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let mut ret = String::new();
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try!(buf.take(len as u64).read_to_string(&mut ret));
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let val: serde_json::Value = serde_json::from_str(&ret[..]).unwrap();
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Result::Ok(Self::from_value(&val))
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}
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fn write_to(&self, buf: &mut io::Write) -> Result<(), io::Error> {
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let val = serde_json::to_string(&self.to_value()).unwrap();
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let bytes = val.as_bytes();
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try!(VarInt(bytes.len() as i32).write_to(buf));
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try!(buf.write_all(bytes));
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Result::Ok(())
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}
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}
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impl Serializable for () {
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fn read_from(_: &mut io::Read) -> Result<(), io::Error> {
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Result::Ok(())
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}
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fn write_to(&self, _: &mut io::Write) -> Result<(), io::Error> {
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Result::Ok(())
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}
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}
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impl Serializable for bool {
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fn read_from(buf: &mut io::Read) -> Result<bool, io::Error> {
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Result::Ok(try!(buf.read_u8()) != 0)
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}
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fn write_to(&self, buf: &mut io::Write) -> Result<(), io::Error> {
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try!(buf.write_u8(if *self {
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1
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} else {
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0
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}));
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Result::Ok(())
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}
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}
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impl Serializable for i8 {
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fn read_from(buf: &mut io::Read) -> Result<i8, io::Error> {
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Result::Ok(try!(buf.read_i8()))
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}
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fn write_to(&self, buf: &mut io::Write) -> Result<(), io::Error> {
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try!(buf.write_i8(*self));
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Result::Ok(())
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}
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}
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impl Serializable for i16 {
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fn read_from(buf: &mut io::Read) -> Result<i16, io::Error> {
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Result::Ok(try!(buf.read_i16::<BigEndian>()))
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}
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fn write_to(&self, buf: &mut io::Write) -> Result<(), io::Error> {
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try!(buf.write_i16::<BigEndian>(*self));
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Result::Ok(())
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}
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}
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impl Serializable for i32 {
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fn read_from(buf: &mut io::Read) -> Result<i32, io::Error> {
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Result::Ok(try!(buf.read_i32::<BigEndian>()))
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}
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fn write_to(&self, buf: &mut io::Write) -> Result<(), io::Error> {
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try!(buf.write_i32::<BigEndian>(*self));
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Result::Ok(())
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}
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}
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impl Serializable for i64 {
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fn read_from(buf: &mut io::Read) -> Result<i64, io::Error> {
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Result::Ok(try!(buf.read_i64::<BigEndian>()))
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}
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fn write_to(&self, buf: &mut io::Write) -> Result<(), io::Error> {
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try!(buf.write_i64::<BigEndian>(*self));
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Result::Ok(())
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}
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}
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impl Serializable for u8 {
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fn read_from(buf: &mut io::Read) -> Result<u8, io::Error> {
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Result::Ok(try!(buf.read_u8()))
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}
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fn write_to(&self, buf: &mut io::Write) -> Result<(), io::Error> {
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try!(buf.write_u8(*self));
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Result::Ok(())
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}
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}
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impl Serializable for u16 {
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fn read_from(buf: &mut io::Read) -> Result<u16, io::Error> {
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Result::Ok(try!(buf.read_u16::<BigEndian>()))
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}
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fn write_to(&self, buf: &mut io::Write) -> Result<(), io::Error> {
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try!(buf.write_u16::<BigEndian>(*self));
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Result::Ok(())
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}
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}
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impl Serializable for u64 {
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fn read_from(buf: &mut io::Read) -> Result<u64, io::Error> {
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Result::Ok(try!(buf.read_u64::<BigEndian>()))
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}
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fn write_to(&self, buf: &mut io::Write) -> Result<(), io::Error> {
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try!(buf.write_u64::<BigEndian>(*self));
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Result::Ok(())
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}
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}
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impl Serializable for f32 {
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fn read_from(buf: &mut io::Read) -> Result<f32, io::Error> {
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Result::Ok(try!(buf.read_f32::<BigEndian>()))
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}
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fn write_to(&self, buf: &mut io::Write) -> Result<(), io::Error> {
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try!(buf.write_f32::<BigEndian>(*self));
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Result::Ok(())
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}
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}
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impl Serializable for f64 {
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fn read_from(buf: &mut io::Read) -> Result<f64, io::Error> {
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Result::Ok(try!(buf.read_f64::<BigEndian>()))
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}
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fn write_to(&self, buf: &mut io::Write) -> Result<(), io::Error> {
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try!(buf.write_f64::<BigEndian>(*self));
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Result::Ok(())
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}
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}
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#[derive(Debug)]
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pub struct UUID(u64, u64);
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impl Default for UUID {
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fn default() -> Self {
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UUID(0, 0)
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}
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}
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impl Serializable for UUID {
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fn read_from(buf: &mut io::Read) -> Result<UUID, io::Error> {
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Result::Ok(UUID(try!(buf.read_u64::<BigEndian>()),
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try!(buf.read_u64::<BigEndian>())))
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}
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fn write_to(&self, buf: &mut io::Write) -> Result<(), io::Error> {
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try!(buf.write_u64::<BigEndian>(self.0));
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try!(buf.write_u64::<BigEndian>(self.1));
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Result::Ok(())
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}
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}
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pub trait Lengthable : Serializable + Copy + Default {
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fn into(self) -> usize;
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fn from(usize) -> Self;
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}
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pub struct LenPrefixed<L: Lengthable, V> {
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len: L,
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pub data: Vec<V>,
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}
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impl <L: Lengthable, V: Default> LenPrefixed<L, V> {
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pub fn new(data: Vec<V>) -> LenPrefixed<L, V> {
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LenPrefixed {
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len: Default::default(),
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data: data,
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}
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}
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}
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impl <L: Lengthable, V: Serializable> Serializable for LenPrefixed<L, V> {
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fn read_from(buf: &mut io::Read) -> Result<LenPrefixed<L, V>, io::Error> {
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let len_data: L = try!(Serializable::read_from(buf));
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let len: usize = len_data.into();
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let mut data: Vec<V> = Vec::with_capacity(len);
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for _ in 0..len {
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data.push(try!(Serializable::read_from(buf)));
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}
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Result::Ok(LenPrefixed {
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len: len_data,
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data: data,
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})
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}
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fn write_to(&self, buf: &mut io::Write) -> Result<(), io::Error> {
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let len_data: L = L::from(self.data.len());
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try!(len_data.write_to(buf));
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let data = &self.data;
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for val in data {
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try!(val.write_to(buf));
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}
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Result::Ok(())
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}
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}
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impl <L: Lengthable, V: Default> Default for LenPrefixed<L, V> {
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fn default() -> Self {
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LenPrefixed {
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len: default::Default::default(),
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data: default::Default::default(),
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}
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}
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}
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impl <L: Lengthable, V: fmt::Debug> fmt::Debug for LenPrefixed<L, V> {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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self.data.fmt(f)
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}
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}
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// Optimization
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pub struct LenPrefixedBytes<L: Lengthable> {
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len: L,
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pub data: Vec<u8>,
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}
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impl <L: Lengthable> LenPrefixedBytes<L> {
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pub fn new(data: Vec<u8>) -> LenPrefixedBytes<L> {
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LenPrefixedBytes {
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len: Default::default(),
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data: data,
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}
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}
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}
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impl <L: Lengthable> Serializable for LenPrefixedBytes<L> {
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fn read_from(buf: &mut io::Read) -> Result<LenPrefixedBytes<L>, io::Error> {
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let len_data: L = try!(Serializable::read_from(buf));
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let len: usize = len_data.into();
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let mut data: Vec<u8> = Vec::with_capacity(len);
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try!(buf.take(len as u64).read_to_end(&mut data));
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Result::Ok(LenPrefixedBytes {
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len: len_data,
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data: data,
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})
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}
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fn write_to(&self, buf: &mut io::Write) -> Result<(), io::Error> {
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let len_data: L = L::from(self.data.len());
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try!(len_data.write_to(buf));
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try!(buf.write_all(&self.data[..]));
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Result::Ok(())
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}
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}
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impl <L: Lengthable> Default for LenPrefixedBytes<L> {
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fn default() -> Self {
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LenPrefixedBytes {
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len: default::Default::default(),
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data: default::Default::default(),
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}
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}
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}
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impl <L: Lengthable> fmt::Debug for LenPrefixedBytes<L> {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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self.data.fmt(f)
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}
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}
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impl Lengthable for i16 {
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fn into(self) -> usize {
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self as usize
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}
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fn from(u: usize) -> i16 {
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u as i16
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}
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}
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impl Lengthable for i32 {
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fn into(self) -> usize {
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self as usize
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}
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fn from(u: usize) -> i32 {
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u as i32
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}
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}
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/// `VarInt` have a variable size (between 1 and 5 bytes) when encoded based
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/// on the size of the number
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#[derive(Clone, Copy)]
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pub struct VarInt(pub i32);
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impl Lengthable for VarInt {
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fn into(self) -> usize {
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self.0 as usize
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}
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fn from(u: usize) -> VarInt {
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VarInt(u as i32)
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}
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}
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impl Serializable for VarInt {
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/// Decodes a `VarInt` from the Reader
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fn read_from(buf: &mut io::Read) -> Result<VarInt, io::Error> {
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const PART : u32 = 0x7F;
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let mut size = 0;
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let mut val = 0u32;
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loop {
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let b = try!(buf.read_u8()) as u32;
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val |= (b & PART) << (size * 7);
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size += 1;
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if size > 5 {
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return Result::Err(io::Error::new(io::ErrorKind::InvalidInput,
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Error::Err("VarInt too big".to_owned())))
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}
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if (b & 0x80) == 0 {
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break
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}
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}
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Result::Ok(VarInt(val as i32))
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}
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/// Encodes a `VarInt` into the Writer
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fn write_to(&self, buf: &mut io::Write) -> Result<(), io::Error> {
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const PART : u32 = 0x7F;
|
|
let mut val = self.0 as u32;
|
|
loop {
|
|
if (val & !PART) == 0 {
|
|
try!(buf.write_u8(val as u8));
|
|
return Result::Ok(());
|
|
}
|
|
try!(buf.write_u8(((val & PART) | 0x80) as u8));
|
|
val >>= 7;
|
|
}
|
|
}
|
|
}
|
|
|
|
impl default::Default for VarInt {
|
|
fn default() -> VarInt {
|
|
VarInt(0)
|
|
}
|
|
}
|
|
|
|
impl fmt::Debug for VarInt {
|
|
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
|
|
write!(f, "{}", self.0)
|
|
}
|
|
}
|
|
|
|
/// `VarLong` have a variable size (between 1 and 10 bytes) when encoded based
|
|
/// on the size of the number
|
|
#[derive(Clone, Copy)]
|
|
pub struct VarLong(pub i64);
|
|
|
|
impl Lengthable for VarLong {
|
|
fn into(self) -> usize {
|
|
self.0 as usize
|
|
}
|
|
|
|
fn from(u: usize) -> VarLong {
|
|
VarLong(u as i64)
|
|
}
|
|
}
|
|
|
|
impl Serializable for VarLong {
|
|
/// Decodes a `VarLong` from the Reader
|
|
fn read_from(buf: &mut io::Read) -> Result<VarLong, io::Error> {
|
|
const PART : u64 = 0x7F;
|
|
let mut size = 0;
|
|
let mut val = 0u64;
|
|
loop {
|
|
let b = try!(buf.read_u8()) as u64;
|
|
val |= (b & PART) << (size * 7);
|
|
size += 1;
|
|
if size > 10 {
|
|
return Result::Err(io::Error::new(io::ErrorKind::InvalidInput,
|
|
Error::Err("VarLong too big".to_owned())))
|
|
}
|
|
if (b & 0x80) == 0 {
|
|
break
|
|
}
|
|
}
|
|
|
|
Result::Ok(VarLong(val as i64))
|
|
}
|
|
|
|
/// Encodes a `VarLong` into the Writer
|
|
fn write_to(&self, buf: &mut io::Write) -> Result<(), io::Error> {
|
|
const PART : u64 = 0x7F;
|
|
let mut val = self.0 as u64;
|
|
loop {
|
|
if (val & !PART) == 0 {
|
|
try!(buf.write_u8(val as u8));
|
|
return Result::Ok(());
|
|
}
|
|
try!(buf.write_u8(((val & PART) | 0x80) as u8));
|
|
val >>= 7;
|
|
}
|
|
}
|
|
}
|
|
|
|
impl default::Default for VarLong {
|
|
fn default() -> VarLong {
|
|
VarLong(0)
|
|
}
|
|
}
|
|
|
|
impl fmt::Debug for VarLong {
|
|
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
|
|
write!(f, "{}", self.0)
|
|
}
|
|
}
|
|
|
|
impl Serializable for Position {
|
|
fn read_from(buf: &mut io::Read) -> Result<Position, io::Error> {
|
|
let pos = try!(buf.read_u64::<BigEndian>());
|
|
Ok(Position::new(
|
|
((pos as i64) >> 38) as i32,
|
|
(((pos as i64) >> 26) & 0xFFF) as i32,
|
|
((pos as i64) << 38 >> 38) as i32
|
|
))
|
|
}
|
|
fn write_to(&self, buf: &mut io::Write) -> Result<(), io::Error> {
|
|
let pos = (((self.x as u64) & 0x3FFFFFF) << 38)
|
|
| (((self.y as u64) & 0xFFF) << 26)
|
|
| ((self.z as u64) & 0x3FFFFFF);
|
|
try!(buf.write_u64::<BigEndian>(pos));
|
|
Result::Ok(())
|
|
}
|
|
}
|
|
|
|
|
|
/// Direction is used to define whether packets are going to the
|
|
/// server or the client.
|
|
#[derive(Clone, Copy)]
|
|
pub enum Direction {
|
|
Serverbound,
|
|
Clientbound,
|
|
}
|
|
|
|
/// The protocol has multiple 'sub-protocols' or states which control which
|
|
/// packet an id points to.
|
|
#[derive(Clone, Copy)]
|
|
pub enum State {
|
|
Handshaking,
|
|
Play,
|
|
Status,
|
|
Login,
|
|
}
|
|
|
|
/// Return for any protocol related error.
|
|
#[derive(Debug)]
|
|
pub enum Error {
|
|
Err(String),
|
|
Disconnect(format::Component),
|
|
IOError(io::Error),
|
|
Json(serde_json::Error),
|
|
Hyper(hyper::Error),
|
|
}
|
|
|
|
impl convert::From<io::Error> for Error {
|
|
fn from(e: io::Error) -> Error {
|
|
Error::IOError(e)
|
|
}
|
|
}
|
|
|
|
impl convert::From<serde_json::Error> for Error {
|
|
fn from(e: serde_json::Error) -> Error {
|
|
Error::Json(e)
|
|
}
|
|
}
|
|
|
|
impl convert::From<hyper::Error> for Error {
|
|
fn from(e: hyper::Error) -> Error {
|
|
Error::Hyper(e)
|
|
}
|
|
}
|
|
|
|
impl ::std::error::Error for Error {
|
|
fn description(&self) -> &str {
|
|
match *self {
|
|
Error::Err(ref val) => &val[..],
|
|
Error::Disconnect(_) => "Disconnect",
|
|
Error::IOError(ref e) => e.description(),
|
|
Error::Json(ref e) => e.description(),
|
|
Error::Hyper(ref e) => e.description(),
|
|
}
|
|
}
|
|
}
|
|
|
|
impl ::std::fmt::Display for Error {
|
|
fn fmt(&self, f: &mut ::std::fmt::Formatter) -> ::std::fmt::Result {
|
|
match *self {
|
|
Error::Err(ref val) => write!(f, "protocol error: {}", val),
|
|
Error::Disconnect(ref val) => write!(f, "{}", val),
|
|
Error::IOError(ref e) => e.fmt(f),
|
|
Error::Json(ref e) => e.fmt(f),
|
|
Error::Hyper(ref e) => e.fmt(f),
|
|
}
|
|
}
|
|
}
|
|
|
|
pub struct Conn {
|
|
stream: TcpStream,
|
|
pub host: String,
|
|
pub port: u16,
|
|
direction: Direction,
|
|
pub state: State,
|
|
|
|
cipher: Option<openssl::EVPCipher>,
|
|
|
|
compression_threshold: i32,
|
|
compression_read: Option<ZlibDecoder<io::Cursor<Vec<u8>>>>,
|
|
compression_write: Option<ZlibEncoder<io::Cursor<Vec<u8>>>>,
|
|
}
|
|
|
|
impl Conn {
|
|
pub fn new(target: &str) -> Result<Conn, Error> {
|
|
// TODO SRV record support
|
|
let mut parts = target.split(':').collect::<Vec<&str>>();
|
|
let address = if parts.len() == 1 {
|
|
parts.push("25565");
|
|
format!("{}:25565", parts[0])
|
|
} else {
|
|
format!("{}:{}", parts[0], parts[1])
|
|
};
|
|
let stream = try!(TcpStream::connect(&*address));
|
|
Result::Ok(Conn {
|
|
stream: stream,
|
|
host: parts[0].to_owned(),
|
|
port: parts[1].parse().unwrap(),
|
|
direction: Direction::Serverbound,
|
|
state: State::Handshaking,
|
|
cipher: Option::None,
|
|
compression_threshold: -1,
|
|
compression_read: Option::None,
|
|
compression_write: Option::None,
|
|
})
|
|
}
|
|
|
|
pub fn write_packet<T: PacketType>(&mut self, packet: T) -> Result<(), Error> {
|
|
let mut buf = Vec::new();
|
|
try!(VarInt(packet.packet_id()).write_to(&mut buf));
|
|
try!(packet.write(&mut buf));
|
|
|
|
let mut extra = if self.compression_threshold >= 0 {
|
|
1
|
|
} else {
|
|
0
|
|
};
|
|
if self.compression_threshold >= 0 && buf.len() as i32 > self.compression_threshold {
|
|
if self.compression_write.is_none() {
|
|
self.compression_write = Some(ZlibEncoder::new(io::Cursor::new(Vec::new()), flate2::Compression::Default));
|
|
}
|
|
extra = 0;
|
|
let uncompressed_size = buf.len();
|
|
let mut new = Vec::new();
|
|
try!(VarInt(uncompressed_size as i32).write_to(&mut new));
|
|
let mut write = self.compression_write.as_mut().unwrap();
|
|
write.reset(io::Cursor::new(buf));
|
|
try!(write.read_to_end(&mut new));
|
|
buf = new;
|
|
}
|
|
|
|
try!(VarInt(buf.len() as i32 + extra).write_to(self));
|
|
if self.compression_threshold >= 0 && extra == 1 {
|
|
try!(VarInt(0).write_to(self));
|
|
}
|
|
try!(self.write_all(&buf));
|
|
|
|
Result::Ok(())
|
|
}
|
|
|
|
pub fn read_packet(&mut self) -> Result<packet::Packet, Error> {
|
|
let len = try!(VarInt::read_from(self)).0 as usize;
|
|
let mut ibuf = vec![0; len];
|
|
try!(self.read_exact(&mut ibuf));
|
|
|
|
let mut buf = io::Cursor::new(ibuf);
|
|
|
|
if self.compression_threshold >= 0 {
|
|
if self.compression_read.is_none() {
|
|
self.compression_read = Some(ZlibDecoder::new(io::Cursor::new(Vec::new())));
|
|
}
|
|
let uncompressed_size = try!(VarInt::read_from(&mut buf)).0;
|
|
if uncompressed_size != 0 {
|
|
let mut new = Vec::with_capacity(uncompressed_size as usize);
|
|
{
|
|
let mut reader = self.compression_read.as_mut().unwrap();
|
|
reader.reset(buf);
|
|
try!(reader.read_to_end(&mut new));
|
|
}
|
|
buf = io::Cursor::new(new);
|
|
}
|
|
}
|
|
let id = try!(VarInt::read_from(&mut buf)).0;
|
|
|
|
let dir = match self.direction {
|
|
Direction::Clientbound => Direction::Serverbound,
|
|
Direction::Serverbound => Direction::Clientbound,
|
|
};
|
|
|
|
let packet = try!(packet::packet_by_id(self.state, dir, id, &mut buf));
|
|
|
|
match packet {
|
|
Some(val) => {
|
|
let pos = buf.position() as usize;
|
|
let ibuf = buf.into_inner();
|
|
if ibuf.len() != pos {
|
|
return Result::Err(Error::Err(format!("Failed to read all of packet 0x{:X}, \
|
|
had {} bytes left",
|
|
id,
|
|
ibuf.len() - pos)))
|
|
}
|
|
Result::Ok(val)
|
|
}
|
|
None => Result::Err(Error::Err("missing packet".to_owned())),
|
|
}
|
|
}
|
|
|
|
pub fn enable_encyption(&mut self, key: &[u8], decrypt: bool) {
|
|
self.cipher = Option::Some(openssl::EVPCipher::new(key, key, decrypt));
|
|
}
|
|
|
|
pub fn set_compresssion(&mut self, threshold: i32) {
|
|
self.compression_threshold = threshold;
|
|
}
|
|
|
|
pub fn do_status(mut self) -> Result<(Status, time::Duration), Error> {
|
|
use serde_json::Value;
|
|
use self::packet::status::serverbound::*;
|
|
use self::packet::handshake::serverbound::Handshake;
|
|
use self::packet::Packet;
|
|
let host = self.host.clone();
|
|
let port = self.port;
|
|
try!(self.write_packet(Handshake {
|
|
protocol_version: VarInt(SUPPORTED_PROTOCOL),
|
|
host: host,
|
|
port: port,
|
|
next: VarInt(1),
|
|
}));
|
|
self.state = State::Status;
|
|
|
|
try!(self.write_packet(StatusRequest { empty: () }));
|
|
|
|
let status = if let Packet::StatusResponse(res) = try!(self.read_packet()) {
|
|
res.status
|
|
} else {
|
|
return Err(Error::Err("Wrong packet".to_owned()));
|
|
};
|
|
|
|
let start = time::now();
|
|
try!(self.write_packet(StatusPing { ping: 42 }));
|
|
|
|
if let Packet::StatusPong(_) = try!(self.read_packet()) {
|
|
} else {
|
|
return Err(Error::Err("Wrong packet".to_owned()));
|
|
};
|
|
|
|
let ping = time::now() - start;
|
|
|
|
let val: Value = match serde_json::from_str(&status) {
|
|
Ok(val) => val,
|
|
Err(_) => return Err(Error::Err("Json parse error".to_owned())),
|
|
};
|
|
|
|
let invalid_status = || Error::Err("Invalid status".to_owned());
|
|
|
|
let version = try!(val.find("version").ok_or(invalid_status()));
|
|
let players = try!(val.find("players").ok_or(invalid_status()));
|
|
|
|
Ok((Status {
|
|
version: StatusVersion {
|
|
name: try!(version.find("name").and_then(Value::as_string).ok_or(invalid_status()))
|
|
.to_owned(),
|
|
protocol: try!(version.find("protocol")
|
|
.and_then(Value::as_i64)
|
|
.ok_or(invalid_status())) as i32,
|
|
},
|
|
players: StatusPlayers {
|
|
max: try!(players.find("max")
|
|
.and_then(Value::as_i64)
|
|
.ok_or(invalid_status())) as i32,
|
|
online: try!(players.find("online")
|
|
.and_then(Value::as_i64)
|
|
.ok_or(invalid_status())) as i32,
|
|
sample: Vec::new(), /* TODO */
|
|
},
|
|
description: format::Component::from_value(try!(val.find("description")
|
|
.ok_or(invalid_status()))),
|
|
favicon: val.find("favicon").and_then(Value::as_string).map(|v| v.to_owned()),
|
|
},
|
|
ping))
|
|
}
|
|
}
|
|
|
|
#[derive(Debug)]
|
|
pub struct Status {
|
|
pub version: StatusVersion,
|
|
pub players: StatusPlayers,
|
|
pub description: format::Component,
|
|
pub favicon: Option<String>,
|
|
}
|
|
|
|
#[derive(Debug)]
|
|
pub struct StatusVersion {
|
|
pub name: String,
|
|
pub protocol: i32,
|
|
}
|
|
|
|
#[derive(Debug)]
|
|
pub struct StatusPlayers {
|
|
pub max: i32,
|
|
pub online: i32,
|
|
pub sample: Vec<StatusPlayer>,
|
|
}
|
|
|
|
#[derive(Debug)]
|
|
pub struct StatusPlayer {
|
|
name: String,
|
|
id: String,
|
|
}
|
|
|
|
impl Read for Conn {
|
|
fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
|
|
match self.cipher.as_mut() {
|
|
Option::None => self.stream.read(buf),
|
|
Option::Some(cipher) => {
|
|
let ret = try!(self.stream.read(buf));
|
|
let data = cipher.decrypt(&buf[..ret]);
|
|
for i in 0..ret {
|
|
buf[i] = data[i];
|
|
}
|
|
Ok(ret)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
impl Write for Conn {
|
|
fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
|
|
match self.cipher.as_mut() {
|
|
Option::None => self.stream.write(buf),
|
|
Option::Some(cipher) => {
|
|
let data = cipher.encrypt(buf);
|
|
try!(self.stream.write_all(&data[..]));
|
|
Ok(buf.len())
|
|
}
|
|
}
|
|
}
|
|
|
|
fn flush(&mut self) -> io::Result<()> {
|
|
self.stream.flush()
|
|
}
|
|
}
|
|
|
|
impl Clone for Conn {
|
|
fn clone(&self) -> Self {
|
|
Conn {
|
|
stream: self.stream.try_clone().unwrap(),
|
|
host: self.host.clone(),
|
|
port: self.port,
|
|
direction: self.direction,
|
|
state: self.state,
|
|
cipher: Option::None,
|
|
compression_threshold: self.compression_threshold,
|
|
compression_read: Option::None,
|
|
compression_write: Option::None,
|
|
}
|
|
}
|
|
}
|
|
|
|
pub trait PacketType: Sized {
|
|
fn packet_id(&self) -> i32;
|
|
|
|
fn write(self, buf: &mut io::Write) -> Result<(), io::Error>;
|
|
}
|