1107 lines
32 KiB
Rust
1107 lines
32 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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#![allow(non_camel_case_types)]
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use aes::Aes128;
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use cfb8::Cfb8;
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use cfb8::stream_cipher::{NewStreamCipher, StreamCipher};
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use serde_json;
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#[cfg(not(target_arch = "wasm32"))]
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use reqwest;
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pub mod mojang;
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use crate::nbt;
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use crate::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::Compression;
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use std::time::{Instant, Duration};
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use crate::shared::Position;
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pub const SUPPORTED_PROTOCOLS: [i32; 12] = [404, 451, 452, 340, 316, 315, 210, 109, 107, 74, 47, 5];
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// TODO: switch to using thread_local storage?, see https://doc.rust-lang.org/std/macro.thread_local.html
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pub static mut CURRENT_PROTOCOL_VERSION: i32 = SUPPORTED_PROTOCOLS[0];
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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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$(#[$attr:meta])*
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packet $name:ident {
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$($(#[$fattr:meta])*field $field:ident: $field_type:ty = $(when ($cond:expr))*, )+
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}
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)*
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})+
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})+) => {
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use crate::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 crate::protocol::*;
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use std::io;
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use crate::format;
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use crate::nbt;
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use crate::types;
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use crate::item;
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use crate::shared::Position;
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#[allow(non_upper_case_globals)]
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pub mod internal_ids {
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create_ids!(i32, $($name),*);
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}
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$(
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#[derive(Default, Debug)]
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$(#[$attr])* pub struct $name {
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$($(#[$fattr])* pub $field: $field_type),+,
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}
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impl PacketType for $name {
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fn packet_id(&self, version: i32) -> i32 {
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packet::versions::translate_internal_packet_id_for_version(version, State::$stateName, Direction::$dirName, internal_ids::$name, false)
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}
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fn write<W: io::Write>(self, buf: &mut W) -> Result<(), Error> {
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$(
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if true $(&& ($cond(&self)))* {
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self.$field.write_to(buf)?;
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}
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)+
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Result::Ok(())
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}
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}
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)*
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}
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)+
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}
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)+
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/// Returns the packet for the given state, direction and id after parsing the fields
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/// from the buffer.
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pub fn packet_by_id<R: io::Read>(version: i32, state: State, dir: Direction, id: i32, mut buf: &mut R) -> Result<Option<Packet>, Error> {
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match state {
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$(
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State::$stateName => {
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match dir {
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$(
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Direction::$dirName => {
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let internal_id = packet::versions::translate_internal_packet_id_for_version(version, state, dir, id, true);
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match internal_id {
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$(
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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.$field = Serializable::read_from(&mut buf)?;
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}
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)+
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Result::Ok(Option::Some(Packet::$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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#[macro_export]
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macro_rules! protocol_packet_ids {
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($($state:ident $stateName:ident {
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$($dir:ident $dirName:ident {
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$(
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$(#[$attr:meta])*
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$id:expr => $name:ident
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)*
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})+
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})+) => {
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use crate::protocol::*;
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pub fn translate_internal_packet_id(state: State, dir: Direction, id: i32, to_internal: bool) -> i32 {
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match state {
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$(
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State::$stateName => {
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match dir {
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$(
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Direction::$dirName => {
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if to_internal {
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match id {
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$(
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$id => crate::protocol::packet::$state::$dir::internal_ids::$name,
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)*
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_ => panic!("bad packet id 0x{:x} in {:?} {:?}", id, dir, state),
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}
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} else {
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match id {
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$(
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crate::protocol::packet::$state::$dir::internal_ids::$name => $id,
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)*
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_ => panic!("bad packet internal id 0x{:x} in {:?} {:?}", id, dir, state),
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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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}
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pub mod packet;
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pub mod versions;
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pub trait Serializable: Sized {
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fn read_from<R: io::Read>(buf: &mut R) -> Result<Self, Error>;
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fn write_to<W: io::Write>(&self, buf: &mut W) -> Result<(), Error>;
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}
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impl Serializable for Vec<u8> {
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fn read_from<R: io::Read>(buf: &mut R) -> Result<Vec<u8>, Error> {
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let mut v = Vec::new();
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buf.read_to_end(&mut v)?;
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Ok(v)
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}
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fn write_to<W: io::Write>(&self, buf: &mut W) -> Result<(), Error> {
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buf.write_all(&self[..]).map_err(|v| v.into())
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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<R: io::Read>(buf: &mut R) -> Result<Option<nbt::NamedTag>, Error> {
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let ty = 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 = nbt::read_string(buf)?;
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let tag = 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<W: io::Write>(&self, buf: &mut W) -> Result<(), Error> {
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match *self {
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Some(ref val) => {
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buf.write_u8(10)?;
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nbt::write_string(buf, &val.0)?;
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val.1.write_to(buf)?;
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}
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None => 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<R: io::Read>(buf: &mut R) -> Result<Option<T>, Error> {
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Result::Ok(Some(T::read_from(buf)?))
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}
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fn write_to<W: io::Write>(&self, buf: &mut W) -> Result<(), Error> {
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if self.is_some() {
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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<R: io::Read>(buf: &mut R) -> Result<String, Error> {
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let len = VarInt::read_from(buf)?.0;
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debug_assert!(len >= 0, "Negative string length: {}", len);
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debug_assert!(len <= 65536, "String length too big: {}", len);
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let mut ret = String::new();
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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<W: io::Write>(&self, buf: &mut W) -> Result<(), Error> {
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let bytes = self.as_bytes();
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VarInt(bytes.len() as i32).write_to(buf)?;
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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<R: io::Read>(buf: &mut R) -> Result<Self, Error> {
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let len = VarInt::read_from(buf)?.0;
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let mut ret = String::new();
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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<W: io::Write>(&self, buf: &mut W) -> Result<(), 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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VarInt(bytes.len() as i32).write_to(buf)?;
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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<R: io::Read>(_: &mut R) -> Result<(), Error> {
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Result::Ok(())
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}
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fn write_to<W: io::Write>(&self, _: &mut W) -> Result<(), 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<R: io::Read>(buf: &mut R) -> Result<bool, Error> {
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Result::Ok(buf.read_u8()? != 0)
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}
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fn write_to<W: io::Write>(&self, buf: &mut W) -> Result<(), Error> {
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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<R: io::Read>(buf: &mut R) -> Result<i8, Error> {
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Result::Ok(buf.read_i8()?)
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}
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fn write_to<W: io::Write>(&self, buf: &mut W) -> Result<(), Error> {
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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<R: io::Read>(buf: &mut R) -> Result<i16, Error> {
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Result::Ok(buf.read_i16::<BigEndian>()?)
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}
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fn write_to<W: io::Write>(&self, buf: &mut W) -> Result<(), Error> {
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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<R: io::Read>(buf: &mut R) -> Result<i32, Error> {
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Result::Ok(buf.read_i32::<BigEndian>()?)
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}
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fn write_to<W: io::Write>(&self, buf: &mut W) -> Result<(), Error> {
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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<R: io::Read>(buf: &mut R) -> Result<i64, Error> {
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Result::Ok(buf.read_i64::<BigEndian>()?)
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}
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fn write_to<W: io::Write>(&self, buf: &mut W) -> Result<(), Error> {
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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<R: io::Read>(buf: &mut R) -> Result<u8, Error> {
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Result::Ok(buf.read_u8()?)
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}
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fn write_to<W: io::Write>(&self, buf: &mut W) -> Result<(), Error> {
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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<R: io::Read>(buf: &mut R) -> Result<u16, Error> {
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Result::Ok(buf.read_u16::<BigEndian>()?)
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}
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fn write_to<W: io::Write>(&self, buf: &mut W) -> Result<(), Error> {
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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<R: io::Read>(buf: &mut R) -> Result<u64, Error> {
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Result::Ok(buf.read_u64::<BigEndian>()?)
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}
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fn write_to<W: io::Write>(&self, buf: &mut W) -> Result<(), Error> {
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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<R: io::Read>(buf: &mut R) -> Result<f32, Error> {
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Result::Ok(buf.read_f32::<BigEndian>()?)
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}
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fn write_to<W: io::Write>(&self, buf: &mut W) -> Result<(), Error> {
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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<R: io::Read>(buf: &mut R) -> Result<f64, Error> {
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Result::Ok(buf.read_f64::<BigEndian>()?)
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}
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fn write_to<W: io::Write>(&self, buf: &mut W) -> Result<(), Error> {
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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, PartialEq, Eq, Hash, Clone)]
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pub struct UUID(u64, u64);
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impl UUID {
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pub fn from_str(s: &str) -> UUID {
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use hex;
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// TODO: Panics aren't the best idea here
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if s.len() != 36 {
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panic!("Invalid UUID format");
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}
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let mut parts = hex::decode(&s[..8]).unwrap();
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parts.extend_from_slice(&hex::decode(&s[9..13]).unwrap());
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parts.extend_from_slice(&hex::decode(&s[14..18]).unwrap());
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parts.extend_from_slice(&hex::decode(&s[19..23]).unwrap());
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parts.extend_from_slice(&hex::decode(&s[24..36]).unwrap());
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let mut high = 0u64;
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let mut low = 0u64;
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for i in 0 .. 8 {
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high |= (parts[i] as u64) << (56 - i*8);
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low |= (parts[i + 8] as u64) << (56 - i*8);
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}
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UUID(high, low)
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}
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}
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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<R: io::Read>(buf: &mut R) -> Result<UUID, Error> {
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Result::Ok(UUID(buf.read_u64::<BigEndian>()?,
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buf.read_u64::<BigEndian>()?))
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}
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fn write_to<W: io::Write>(&self, buf: &mut W) -> Result<(), Error> {
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buf.write_u64::<BigEndian>(self.0)?;
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buf.write_u64::<BigEndian>(self.1)?;
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Result::Ok(())
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}
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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,
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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<R: io::Read>(buf: &mut R) -> Result<LenPrefixed<L, V>, Error> {
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let len_data: L = 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(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,
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})
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}
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fn write_to<W: io::Write>(&self, buf: &mut W) -> Result<(), Error> {
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let len_data: L = L::from(self.data.len());
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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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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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|
|
|
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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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|
|
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impl <L: Lengthable> LenPrefixedBytes<L> {
|
|
pub fn new(data: Vec<u8>) -> LenPrefixedBytes<L> {
|
|
LenPrefixedBytes {
|
|
len: Default::default(),
|
|
data,
|
|
}
|
|
}
|
|
}
|
|
|
|
impl <L: Lengthable> Serializable for LenPrefixedBytes<L> {
|
|
fn read_from<R: io::Read>(buf: &mut R) -> Result<LenPrefixedBytes<L>, Error> {
|
|
let len_data: L = Serializable::read_from(buf)?;
|
|
let len: usize = len_data.into();
|
|
let mut data: Vec<u8> = Vec::with_capacity(len);
|
|
buf.take(len as u64).read_to_end(&mut data)?;
|
|
Result::Ok(LenPrefixedBytes {
|
|
len: len_data,
|
|
data,
|
|
})
|
|
}
|
|
|
|
fn write_to<W: io::Write>(&self, buf: &mut W) -> Result<(), Error> {
|
|
let len_data: L = L::from(self.data.len());
|
|
len_data.write_to(buf)?;
|
|
buf.write_all(&self.data[..])?;
|
|
Result::Ok(())
|
|
}
|
|
}
|
|
|
|
|
|
impl <L: Lengthable> Default for LenPrefixedBytes<L> {
|
|
fn default() -> Self {
|
|
LenPrefixedBytes {
|
|
len: default::Default::default(),
|
|
data: default::Default::default(),
|
|
}
|
|
}
|
|
}
|
|
|
|
impl <L: Lengthable> fmt::Debug for LenPrefixedBytes<L> {
|
|
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
|
|
self.data.fmt(f)
|
|
}
|
|
}
|
|
|
|
impl Lengthable for bool {
|
|
fn into(self) -> usize {
|
|
if self { 1 } else { 0 }
|
|
}
|
|
|
|
fn from(u: usize) -> bool {
|
|
u != 0
|
|
}
|
|
}
|
|
|
|
|
|
impl Lengthable for u8 {
|
|
fn into(self) -> usize {
|
|
self as usize
|
|
}
|
|
|
|
fn from(u: usize) -> u8 {
|
|
u as u8
|
|
}
|
|
}
|
|
|
|
impl Lengthable for i16 {
|
|
fn into(self) -> usize {
|
|
self as usize
|
|
}
|
|
|
|
fn from(u: usize) -> i16 {
|
|
u as i16
|
|
}
|
|
}
|
|
|
|
impl Lengthable for i32 {
|
|
fn into(self) -> usize {
|
|
self as usize
|
|
}
|
|
|
|
fn from(u: usize) -> i32 {
|
|
u as i32
|
|
}
|
|
}
|
|
|
|
/// `VarInt` have a variable size (between 1 and 5 bytes) when encoded based
|
|
/// on the size of the number
|
|
#[derive(Clone, Copy)]
|
|
pub struct VarInt(pub i32);
|
|
|
|
impl Lengthable for VarInt {
|
|
fn into(self) -> usize {
|
|
self.0 as usize
|
|
}
|
|
|
|
fn from(u: usize) -> VarInt {
|
|
VarInt(u as i32)
|
|
}
|
|
}
|
|
|
|
impl Serializable for VarInt {
|
|
/// Decodes a `VarInt` from the Reader
|
|
fn read_from<R: io::Read>(buf: &mut R) -> Result<VarInt, Error> {
|
|
const PART : u32 = 0x7F;
|
|
let mut size = 0;
|
|
let mut val = 0u32;
|
|
loop {
|
|
let b = buf.read_u8()? as u32;
|
|
val |= (b & PART) << (size * 7);
|
|
size += 1;
|
|
if size > 5 {
|
|
return Result::Err(Error::Err("VarInt too big".to_owned()));
|
|
}
|
|
if (b & 0x80) == 0 {
|
|
break
|
|
}
|
|
}
|
|
|
|
Result::Ok(VarInt(val as i32))
|
|
}
|
|
|
|
/// Encodes a `VarInt` into the Writer
|
|
fn write_to<W: io::Write>(&self, buf: &mut W) -> Result<(), Error> {
|
|
const PART : u32 = 0x7F;
|
|
let mut val = self.0 as u32;
|
|
loop {
|
|
if (val & !PART) == 0 {
|
|
buf.write_u8(val as u8)?;
|
|
return Result::Ok(());
|
|
}
|
|
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<R: io::Read>(buf: &mut R) -> Result<VarLong, Error> {
|
|
const PART : u64 = 0x7F;
|
|
let mut size = 0;
|
|
let mut val = 0u64;
|
|
loop {
|
|
let b = buf.read_u8()? as u64;
|
|
val |= (b & PART) << (size * 7);
|
|
size += 1;
|
|
if size > 10 {
|
|
return Result::Err(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<W: io::Write>(&self, buf: &mut W) -> Result<(), Error> {
|
|
const PART : u64 = 0x7F;
|
|
let mut val = self.0 as u64;
|
|
loop {
|
|
if (val & !PART) == 0 {
|
|
buf.write_u8(val as u8)?;
|
|
return Result::Ok(());
|
|
}
|
|
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<R: io::Read>(buf: &mut R) -> Result<Position, Error> {
|
|
let pos = 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<W: io::Write>(&self, buf: &mut W) -> Result<(), Error> {
|
|
let pos = (((self.x as u64) & 0x3FFFFFF) << 38)
|
|
| (((self.y as u64) & 0xFFF) << 26)
|
|
| ((self.z as u64) & 0x3FFFFFF);
|
|
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, Debug)]
|
|
pub enum Direction {
|
|
Serverbound,
|
|
Clientbound,
|
|
}
|
|
|
|
/// The protocol has multiple 'sub-protocols' or states which control which
|
|
/// packet an id points to.
|
|
#[derive(Clone, Copy, Debug)]
|
|
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),
|
|
#[cfg(not(target_arch = "wasm32"))]
|
|
Reqwest(reqwest::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)
|
|
}
|
|
}
|
|
|
|
#[cfg(not(target_arch = "wasm32"))]
|
|
impl convert::From<reqwest::Error> for Error {
|
|
fn from(e: reqwest::Error) -> Error {
|
|
Error::Reqwest(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(),
|
|
#[cfg(not(target_arch = "wasm32"))]
|
|
Error::Reqwest(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),
|
|
#[cfg(not(target_arch = "wasm32"))]
|
|
Error::Reqwest(ref e) => e.fmt(f),
|
|
}
|
|
}
|
|
}
|
|
|
|
type Aes128Cfb = Cfb8<Aes128>;
|
|
|
|
pub struct Conn {
|
|
stream: TcpStream,
|
|
pub host: String,
|
|
pub port: u16,
|
|
direction: Direction,
|
|
pub protocol_version: i32,
|
|
pub state: State,
|
|
|
|
cipher: Option<Aes128Cfb>,
|
|
|
|
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, protocol_version: i32) -> Result<Conn, Error> {
|
|
unsafe {
|
|
CURRENT_PROTOCOL_VERSION = protocol_version;
|
|
}
|
|
|
|
// 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 = TcpStream::connect(&*address)?;
|
|
Result::Ok(Conn {
|
|
stream,
|
|
host: parts[0].to_owned(),
|
|
port: parts[1].parse().unwrap(),
|
|
direction: Direction::Serverbound,
|
|
state: State::Handshaking,
|
|
protocol_version,
|
|
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();
|
|
VarInt(packet.packet_id(self.protocol_version)).write_to(&mut buf)?;
|
|
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()), Compression::default()));
|
|
}
|
|
extra = 0;
|
|
let uncompressed_size = buf.len();
|
|
let mut new = Vec::new();
|
|
VarInt(uncompressed_size as i32).write_to(&mut new)?;
|
|
let write = self.compression_write.as_mut().unwrap();
|
|
write.reset(io::Cursor::new(buf));
|
|
write.read_to_end(&mut new)?;
|
|
buf = new;
|
|
}
|
|
|
|
VarInt(buf.len() as i32 + extra).write_to(self)?;
|
|
if self.compression_threshold >= 0 && extra == 1 {
|
|
VarInt(0).write_to(self)?;
|
|
}
|
|
self.write_all(&buf)?;
|
|
|
|
Result::Ok(())
|
|
}
|
|
|
|
pub fn read_packet(&mut self) -> Result<packet::Packet, Error> {
|
|
let len = VarInt::read_from(self)?.0 as usize;
|
|
let mut ibuf = vec![0; len];
|
|
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 = VarInt::read_from(&mut buf)?.0;
|
|
if uncompressed_size != 0 {
|
|
let mut new = Vec::with_capacity(uncompressed_size as usize);
|
|
{
|
|
let reader = self.compression_read.as_mut().unwrap();
|
|
reader.reset(buf);
|
|
reader.read_to_end(&mut new)?;
|
|
}
|
|
buf = io::Cursor::new(new);
|
|
}
|
|
}
|
|
let id = VarInt::read_from(&mut buf)?.0;
|
|
|
|
let dir = match self.direction {
|
|
Direction::Clientbound => Direction::Serverbound,
|
|
Direction::Serverbound => Direction::Clientbound,
|
|
};
|
|
|
|
let packet = packet::packet_by_id(self.protocol_version, 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) {
|
|
let cipher = Aes128Cfb::new_var(key, key).unwrap();
|
|
self.cipher = Option::Some(cipher);
|
|
}
|
|
|
|
pub fn set_compresssion(&mut self, threshold: i32) {
|
|
self.compression_threshold = threshold;
|
|
}
|
|
|
|
pub fn do_status(mut self) -> Result<(Status, 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;
|
|
self.write_packet(Handshake {
|
|
protocol_version: VarInt(self.protocol_version),
|
|
host,
|
|
port,
|
|
next: VarInt(1),
|
|
})?;
|
|
self.state = State::Status;
|
|
|
|
self.write_packet(StatusRequest { empty: () })?;
|
|
|
|
let status = if let Packet::StatusResponse(res) = self.read_packet()? {
|
|
res.status
|
|
} else {
|
|
return Err(Error::Err("Wrong packet".to_owned()));
|
|
};
|
|
|
|
let start = Instant::now();
|
|
self.write_packet(StatusPing { ping: 42 })?;
|
|
|
|
if let Packet::StatusPong(_) = self.read_packet()? {
|
|
} else {
|
|
return Err(Error::Err("Wrong packet".to_owned()));
|
|
};
|
|
|
|
let ping = start.elapsed();
|
|
|
|
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 = val.get("version").ok_or(invalid_status())?;
|
|
let players = val.get("players").ok_or(invalid_status())?;
|
|
|
|
Ok((Status {
|
|
version: StatusVersion {
|
|
name: version.get("name").and_then(Value::as_str).ok_or(invalid_status())?
|
|
.to_owned(),
|
|
protocol: version.get("protocol")
|
|
.and_then(Value::as_i64)
|
|
.ok_or(invalid_status())? as i32,
|
|
},
|
|
players: StatusPlayers {
|
|
max: players.get("max")
|
|
.and_then(Value::as_i64)
|
|
.ok_or(invalid_status())? as i32,
|
|
online: players.get("online")
|
|
.and_then(Value::as_i64)
|
|
.ok_or(invalid_status())? as i32,
|
|
sample: Vec::new(), /* TODO */
|
|
},
|
|
description: format::Component::from_value(val.get("description")
|
|
.ok_or(invalid_status())?),
|
|
favicon: val.get("favicon").and_then(Value::as_str).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 = self.stream.read(buf)?;
|
|
cipher.decrypt(&mut buf[..ret]);
|
|
|
|
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) => {
|
|
// TODO: avoid copying, but trait requires non-mutable buf
|
|
let mut data = vec![0; buf.len()];
|
|
for i in 0..buf.len() {
|
|
data[i] = buf[i];
|
|
}
|
|
|
|
cipher.encrypt(&mut data);
|
|
|
|
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,
|
|
protocol_version: self.protocol_version,
|
|
cipher: Option::None,
|
|
compression_threshold: self.compression_threshold,
|
|
compression_read: Option::None,
|
|
compression_write: Option::None,
|
|
}
|
|
}
|
|
}
|
|
|
|
pub trait PacketType {
|
|
fn packet_id(&self, protocol_version: i32) -> i32;
|
|
|
|
fn write<W: io::Write>(self, buf: &mut W) -> Result<(), Error>;
|
|
}
|