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"winapi-x86_64-pc-windows-gnu",
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dependencies = [
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7
Cargo.toml Normal file
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@ -0,0 +1,7 @@
[workspace]
members = [
"bot",
"minecraft-client",
"minecraft-protocol",
]

11
bot/Cargo.toml Normal file
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@ -0,0 +1,11 @@
[package]
name = "bot"
version = "0.1.0"
edition = "2021"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
minecraft-client = { path = "../minecraft-client" }
minecraft-protocol = { path = "../minecraft-protocol" }
tokio = "^1.14.0"

17
bot/src/main.rs Normal file
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@ -0,0 +1,17 @@
use minecraft_client;
use minecraft_protocol::ServerAddress;
use tokio::runtime::Runtime;
async fn bot() {
let address = ServerAddress::parse(&"play.wynncraft.com".to_string()).unwrap();
minecraft_protocol::server_status_pinger::ping_server(&address)
.await
.unwrap();
}
fn main() {
println!("Hello, world!");
let io_loop = Runtime::new().unwrap();
io_loop.block_on(bot());
}

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@ -0,0 +1,9 @@
[package]
name = "minecraft-client"
version = "0.1.0"
edition = "2021"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
minecraft-protocol = { path = "../minecraft-protocol" }

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@ -0,0 +1,10 @@
use minecraft_protocol;
#[cfg(test)]
mod tests {
#[test]
fn it_works() {
let result = 2 + 2;
assert_eq!(result, 4);
}
}

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@ -0,0 +1,15 @@
[package]
edition = "2021"
name = "minecraft-protocol"
version = "0.1.0"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
async-recursion = "^0.3.2"
byteorder = "^1.4.3"
bytes = "^1.1.0"
thiserror = "^1.0.30"
tokio = {version = "^1.14.0", features = ["io-util"]}
tokio-util = "^0.6.9"
trust-dns-resolver = "^0.20.3"

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@ -0,0 +1,38 @@
use crate::ServerIpAddress;
use bytes::BytesMut;
use tokio::{io::BufWriter, net::TcpStream};
pub enum PacketFlow {
ClientToServer,
ServerToClient,
}
pub struct Connection {
pub flow: PacketFlow,
pub stream: BufWriter<TcpStream>,
/// The read buffer
pub buffer: BytesMut,
}
impl Connection {
pub async fn new(address: &ServerIpAddress) -> Result<Connection, String> {
let ip = address.ip;
let port = address.port;
let stream = TcpStream::connect(format!("{}:{}", ip, port))
.await
.map_err(|_| "Failed to connect to server")?;
// enable tcp_nodelay
stream
.set_nodelay(true)
.expect("Error enabling tcp_nodelay");
Ok(Connection {
flow: PacketFlow::ClientToServer,
stream: BufWriter::new(stream),
// 4mb read buffer
buffer: BytesMut::with_capacity(4 * 1024 * 1024),
})
}
}

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//! Minecraft calls it a "friendly byte buffer".
use byteorder::{BigEndian, WriteBytesExt};
// use std::io::Write;
const MAX_VARINT_SIZE: u32 = 5;
const MAX_VARLONG_SIZE: u32 = 10;
const DEFAULT_NBT_QUOTA: u32 = 2097152;
const MAX_STRING_LENGTH: u16 = 32767;
const MAX_COMPONENT_STRING_LENGTH: u32 = 262144;
pub struct FriendlyByteBuf<'a> {
source: &'a mut Vec<u8>,
}
impl FriendlyByteBuf<'_> {
pub fn write_byte(&mut self, n: u8) {
self.source.write_u8(n).unwrap();
println!("write_byte: {}", n);
}
pub fn write_bytes(&mut self, bytes: &[u8]) {
self.source.extend_from_slice(bytes);
}
pub fn write_varint(&mut self, mut n: u32) {
loop {
if (n & 0xFFFFFF80) == 0 {
self.write_byte(n as u8);
return ();
}
self.write_byte((n & 0x7F | 0x80) as u8);
n >>= 7;
}
}
pub fn write_utf_with_len(&mut self, string: &String, len: usize) {
if string.len() > len {
panic!(
"String too big (was {} bytes encoded, max {})",
string.len(),
len
);
}
self.write_varint(string.len() as u32);
self.write_bytes(string.as_bytes());
}
pub fn write_utf(&mut self, string: &String) {
self.write_utf_with_len(string, MAX_STRING_LENGTH as usize);
}
pub fn write_short(&mut self, n: u16) {
self.source.write_u16::<BigEndian>(n).unwrap();
}
}

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@ -0,0 +1,53 @@
use std::net::IpAddr;
use std::net::TcpStream;
use std::str::FromStr;
use tokio::runtime::Runtime;
pub mod connection;
pub mod friendly_byte_buf;
pub mod packets;
pub mod resolver;
pub mod server_status_pinger;
#[derive(Debug)]
pub struct ServerAddress {
pub host: String,
pub port: u16,
}
#[derive(Debug)]
pub struct ServerIpAddress {
pub ip: IpAddr,
pub port: u16,
}
impl ServerAddress {
/// Convert a Minecraft server address (host:port, the port is optional) to a ServerAddress
pub fn parse(string: &String) -> Result<ServerAddress, String> {
if string.is_empty() {
return Err("Empty string".to_string());
}
let mut parts = string.split(':');
let host = parts.next().ok_or("No host specified")?.to_string();
// default the port to 25565
let port = parts.next().unwrap_or("25565");
let port = u16::from_str(port).map_err(|_| "Invalid port specified")?;
Ok(ServerAddress { host, port })
}
}
pub async fn connect(address: ServerAddress) -> Result<(), Box<dyn std::error::Error>> {
let resolved_address = resolver::resolve_address(&address).await;
println!("Resolved address: {:?}", resolved_address);
Ok(())
}
#[cfg(test)]
mod tests {
#[test]
fn it_works() {
let result = 2 + 2;
assert_eq!(result, 4);
}
}

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@ -0,0 +1,21 @@
use crate::friendly_byte_buf::FriendlyByteBuf;
use super::{ConnectionProtocol, Packet};
pub struct ClientIntentionPacket {
protocol_version: u32,
hostname: String,
port: u16,
intention: ConnectionProtocol,
}
// implement "Packet" for "ClientIntentionPacket"
impl Packet for ClientIntentionPacket {
// implement "from_reader" for "ClientIntentionPacket"
fn write(&self, buf: &mut FriendlyByteBuf) {
buf.write_varint(self.protocol_version);
buf.write_utf(&self.hostname);
buf.write_short(self.port);
buf.write_varint(self.intention.clone() as u32);
}
}

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@ -0,0 +1,27 @@
pub mod client_intention_packet;
use crate::friendly_byte_buf::FriendlyByteBuf;
#[derive(Debug, Clone, PartialEq)]
pub enum ConnectionProtocol {
Handshaking = -1,
Play = 0,
Status = 1,
Login = 2,
}
pub trait Packet {
fn write(&self, friendly_byte_buf: &mut FriendlyByteBuf) -> ();
}
struct PacketSet<'a> {
pub packets: Vec<&'a dyn Packet>,
}
impl<'a> PacketSet<'a> {
fn add_packet(&mut self, packet: &'a dyn Packet) {
self.packets.push(packet);
}
}
// PacketSet

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@ -0,0 +1,56 @@
use std::net::IpAddr;
use crate::{ServerAddress, ServerIpAddress};
use async_recursion::async_recursion;
use trust_dns_resolver::{
config::{ResolverConfig, ResolverOpts},
TokioAsyncResolver,
};
/// Resolve a Minecraft server address into an IP address and port.
/// If it's already an IP address, it's returned as-is.
#[async_recursion]
pub async fn resolve_address(address: &ServerAddress) -> Result<ServerIpAddress, String> {
// If the address.host is already in the format of an ip address, return it.
if let Ok(ip) = address.host.parse::<IpAddr>() {
return Ok(ServerIpAddress {
ip: ip,
port: address.port,
});
}
// we specify Cloudflare instead of the default resolver because trust_dns_resolver has an issue on Windows where it's really slow using the default resolver
let resolver =
TokioAsyncResolver::tokio(ResolverConfig::cloudflare(), ResolverOpts::default()).unwrap();
// first, we do a srv lookup for _minecraft._tcp.<host>
let srv_redirect_result = resolver
.srv_lookup(format!("_minecraft._tcp.{}", address.host).as_str())
.await;
// if it resolves that means it's a redirect so we call resolve_address again with the new host
if srv_redirect_result.is_ok() {
let redirect_result = srv_redirect_result.unwrap();
let redirect_srv = redirect_result
.iter()
.next()
.ok_or_else(|| "No SRV record found".to_string())?;
let redirect_address = ServerAddress {
host: redirect_srv.target().to_utf8(),
port: redirect_srv.port(),
};
println!("redirecting to {:?}", redirect_address);
return resolve_address(&redirect_address).await;
}
// there's no redirect, try to resolve this as an ip address
let lookup_ip_result = resolver.lookup_ip(address.host.clone()).await;
let lookup_ip = lookup_ip_result.map_err(|_| "No IP found".to_string())?;
Ok(ServerIpAddress {
ip: lookup_ip.iter().next().unwrap(),
port: address.port,
})
}

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@ -0,0 +1,100 @@
use crate::{connection::Connection, resolver, ServerAddress};
use tokio::{
io::{AsyncReadExt, AsyncWriteExt, BufWriter},
net::TcpStream,
};
struct ServerStatus {}
async fn write_byte(buf: &mut Vec<u8>, n: u8) {
buf.write_u8(n).await.unwrap();
println!("write_byte: {}", n);
}
async fn write_bytes(buf: &mut Vec<u8>, bytes: &[u8]) {
buf.write_all(bytes).await.unwrap();
println!("write_bytes: {:?}", buf);
}
async fn write_varint(buf: &mut Vec<u8>, mut n: u32) {
loop {
if (n & 0xFFFFFF80) == 0 {
write_byte(buf, n as u8).await;
return ();
}
write_byte(buf, (n & 0x7F | 0x80) as u8).await;
n >>= 7;
}
}
async fn write_utf(buf: &mut Vec<u8>, string: &[u8], len: usize) {
if string.len() > len {
panic!(
"String too big (was {} bytes encoded, max {})",
string.len(),
len
);
}
write_varint(buf, string.len() as u32).await;
write_bytes(buf, string).await;
}
async fn write_short(buf: &mut Vec<u8>, n: u16) {
buf.write_u16(n).await.unwrap();
println!("write_short: {}", n);
}
pub async fn ping_server(address: &ServerAddress) -> Result<(), String> {
let resolved_address = resolver::resolve_address(&address).await?;
let mut conn = Connection::new(&resolved_address).await?;
// protocol version is 757
// client intention packet
// friendlyByteBuf.writeVarInt(this.protocolVersion);
// friendlyByteBuf.writeUtf(this.hostName);
// friendlyByteBuf.writeShort(this.port);
// friendlyByteBuf.writeVarInt(this.intention.getId());
println!("resolved_address {}", &resolved_address.ip);
println!("writing intention packet {}", address.host);
let mut buf: Vec<u8> = vec![0x00]; // 0 is the packet id for handshake
write_varint(&mut buf, 757).await;
write_utf(&mut buf, address.host.as_bytes(), 32767).await;
write_short(&mut buf, address.port).await;
write_varint(&mut buf, 1).await;
let mut full_buffer = vec![];
write_varint(&mut full_buffer, buf.len() as u32).await; // length of 1st packet id + data as VarInt
full_buffer.append(&mut buf);
full_buffer.extend_from_slice(&[
1, // length of 2nd packet id + data as VarInt
0x00, // 2nd packet id: 0 for request as VarInt
]);
conn.stream.write_all(&full_buffer).await.unwrap();
conn.stream.flush().await.unwrap();
// log what the server sends back
loop {
if 0 == conn.stream.read_buf(&mut conn.buffer).await.unwrap() {
// The remote closed the connection. For this to be a clean
// shutdown, there should be no data in the read buffer. If
// there is, this means that the peer closed the socket while
// sending a frame.
// log conn.buffer
println!("{:?}", conn.buffer);
if conn.buffer.is_empty() {
println!("buffer is empty ok");
return Ok(());
} else {
return Err("connection reset by peer".into());
}
}
}
Ok(())
}