diff options
| -rw-r--r-- | Cargo.toml | 5 | ||||
| -rw-r--r-- | LICENSE | 674 | ||||
| -rw-r--r-- | README.md | 14 | ||||
| -rw-r--r-- | examples/example.rs | 54 | ||||
| -rw-r--r-- | src/client.rs | 3 | ||||
| -rw-r--r-- | src/error.rs | 2 | ||||
| -rw-r--r-- | src/lib.rs (renamed from src/main.rs) | 135 | ||||
| -rw-r--r-- | src/new.rs | 9 | ||||
| -rw-r--r-- | src/recv.rs | 28 | ||||
| -rw-r--r-- | src/send.rs | 5 |
10 files changed, 817 insertions, 112 deletions
@@ -8,5 +8,8 @@ async-recursion = "1.0.0" async-trait = "0.1.60" byteorder = "1.4.3" num_enum = "0.5.7" +tokio = { version = "1.23.0", features = ["sync", "time", "net", "signal", "macros", "rt"] } + +[dev-dependencies] pretty-hex = "0.3.0" -tokio = { version = "1.23.0", features = ["full"] } +tokio = { features = ["rt-multi-thread"] } @@ -0,0 +1,674 @@ + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/> + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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If not, see <https://www.gnu.org/licenses/>. + +Also add information on how to contact you by electronic and paper mail. + + If the program does terminal interaction, make it output a short +notice like this when it starts in an interactive mode: + + <program> Copyright (C) <year> <name of author> + This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, your program's commands +might be different; for a GUI interface, you would use an "about box". + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU GPL, see +<https://www.gnu.org/licenses/>. + + The GNU General Public License does not permit incorporating your program +into proprietary programs. If your program is a subroutine library, you +may consider it more useful to permit linking proprietary applications with +the library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. But first, please read +<https://www.gnu.org/licenses/why-not-lgpl.html>. diff --git a/README.md b/README.md new file mode 100644 index 0000000..d40c495 --- /dev/null +++ b/README.md @@ -0,0 +1,14 @@ +# mt_rudp + +A Rust library for the [Minetest](http://minetest.net) RUDP protocol. + +This project is inspired by the equivalent [Go library](https://github.com/anon55555/mt/tree/master/rudp) by anon5 and uses it as reference implementation. + +This library is the first piece in a ecosystem of Rust libraries for building servers, clients and proxies for Minetest. + +## TODO + +- implement sending split packets +- implement server +- implement reliable window +- documentation diff --git a/examples/example.rs b/examples/example.rs new file mode 100644 index 0000000..0a6dc42 --- /dev/null +++ b/examples/example.rs @@ -0,0 +1,54 @@ +use byteorder::{BigEndian, WriteBytesExt}; +use mt_rudp::{Client, RudpReceiver, RudpSender}; +use pretty_hex::PrettyHex; +use std::io::{self, Write}; + +async fn example(tx: &RudpSender<Client>, rx: &mut RudpReceiver<Client>) -> io::Result<()> { + // send hello packet + let mut pkt = vec![]; + pkt.write_u16::<BigEndian>(2)?; // high level type + pkt.write_u8(29)?; // serialize ver + pkt.write_u16::<BigEndian>(0)?; // compression modes + pkt.write_u16::<BigEndian>(40)?; // MinProtoVer + pkt.write_u16::<BigEndian>(40)?; // MaxProtoVer + pkt.write_u16::<BigEndian>(3)?; // player name length + pkt.write(b"foo")?; // player name + + tx.send(mt_rudp::Pkt { + unrel: true, + chan: 1, + data: &pkt, + }) + .await?; + + // handle incoming packets + while let Some(result) = rx.recv().await { + match result { + Ok(pkt) => { + println!("{}", pkt.data.hex_dump()); + } + Err(err) => eprintln!("Error: {}", err), + } + } + + Ok(()) +} + +#[tokio::main] +async fn main() -> io::Result<()> { + let (tx, mut rx) = mt_rudp::connect("127.0.0.1:30000").await?; + + tokio::select! { + _ = tokio::signal::ctrl_c() => println!("canceled"), + res = example(&tx, &mut rx) => { + res?; + println!("disconnected"); + } + } + + // close either the receiver or the sender + // this shuts down associated tasks + rx.close().await; + + Ok(()) +} diff --git a/src/client.rs b/src/client.rs index 172aa96..e6d7e75 100644 --- a/src/client.rs +++ b/src/client.rs @@ -1,4 +1,5 @@ -use crate::*; +use crate::prelude::*; +use async_trait::async_trait; use std::{io, sync::Arc}; use tokio::net; diff --git a/src/error.rs b/src/error.rs index 7853f59..6dec6c8 100644 --- a/src/error.rs +++ b/src/error.rs @@ -1,4 +1,4 @@ -use crate::{CtlType, InPkt, PktType}; +use crate::prelude::*; use num_enum::TryFromPrimitiveError; use std::{fmt, io}; use tokio::sync::mpsc::error::SendError; @@ -2,53 +2,27 @@ #![feature(hash_drain_filter)] #![feature(once_cell)] mod client; -pub mod error; +mod error; mod new; mod recv; mod send; +pub use prelude::*; + use async_trait::async_trait; -use byteorder::{BigEndian, WriteBytesExt}; -pub use client::{connect, Sender as Client}; -pub use new::new; use num_enum::TryFromPrimitive; -use pretty_hex::PrettyHex; use std::{ + cell::{Cell, OnceCell}, collections::HashMap, - io::{self, Write}, - ops, + io, ops, sync::Arc, - time::Duration, + time::Instant, }; use tokio::{ sync::{mpsc, watch, Mutex, RwLock}, task::JoinSet, }; -pub const PROTO_ID: u32 = 0x4f457403; -pub const UDP_PKT_SIZE: usize = 512; -pub const NUM_CHANS: usize = 3; -pub const REL_BUFFER: usize = 0x8000; -pub const INIT_SEQNUM: u16 = 65500; -pub const TIMEOUT: u64 = 30; -pub const PING_TIMEOUT: u64 = 5; - -mod ticker_mod { - #[macro_export] - macro_rules! ticker { - ($duration:expr, $close:expr, $body:block) => { - let mut interval = tokio::time::interval($duration); - - while tokio::select!{ - _ = interval.tick() => true, - _ = $close.changed() => false, - } $body - }; - } - - //pub(crate) use ticker; -} - #[async_trait] pub trait UdpSender: Send + Sync + 'static { async fn send(&self, data: &[u8]) -> io::Result<()>; @@ -87,13 +61,12 @@ pub enum CtlType { #[derive(Debug)] pub struct Pkt<T> { - unrel: bool, - chan: u8, - data: T, + pub unrel: bool, + pub chan: u8, + pub data: T, } -pub type Error = error::Error; -pub type InPkt = Result<Pkt<Vec<u8>>, Error>; +pub type InPkt = Result<Pkt<Vec<u8>>, error::Error>; #[derive(Debug)] struct Ack { @@ -109,7 +82,7 @@ struct Chan { } #[derive(Debug)] -pub struct RudpShare<S: UdpSender> { +struct RudpShare<S: UdpSender> { id: u16, remote_id: RwLock<u16>, chans: Vec<Mutex<Chan>>, @@ -169,51 +142,53 @@ impl<S: UdpSender> ops::DerefMut for RudpReceiver<S> { } } -async fn example(tx: &RudpSender<Client>, rx: &mut RudpReceiver<Client>) -> io::Result<()> { - // send hello packet - let mut mtpkt = vec![]; - mtpkt.write_u16::<BigEndian>(2)?; // high level type - mtpkt.write_u8(29)?; // serialize ver - mtpkt.write_u16::<BigEndian>(0)?; // compression modes - mtpkt.write_u16::<BigEndian>(40)?; // MinProtoVer - mtpkt.write_u16::<BigEndian>(40)?; // MaxProtoVer - mtpkt.write_u16::<BigEndian>(6)?; // player name length - mtpkt.write(b"foobar")?; // player name - - tx.send(Pkt { - unrel: true, - chan: 1, - data: &mtpkt, - }) - .await?; - // handle incoming packets - while let Some(result) = rx.recv().await { - match result { - Ok(pkt) => { - println!("{}", pkt.data.hex_dump()); - } - Err(err) => eprintln!("Error: {}", err), - } - } - - Ok(()) +#[derive(Debug)] +struct Split { + timestamp: Option<Instant>, + chunks: Vec<OnceCell<Vec<u8>>>, + got: usize, } -#[tokio::main] -async fn main() -> io::Result<()> { - let (tx, mut rx) = connect("127.0.0.1:30000").await?; +struct RecvChan { + packets: Vec<Cell<Option<Vec<u8>>>>, // char ** 😛 + splits: HashMap<u16, Split>, + seqnum: u16, + num: u8, +} - tokio::select! { - _ = tokio::signal::ctrl_c() => println!("canceled"), - res = example(&tx, &mut rx) => { - res?; - println!("disconnected"); - } - } +struct RecvWorker<R: UdpReceiver, S: UdpSender> { + share: Arc<RudpShare<S>>, + close: watch::Receiver<bool>, + chans: Arc<Vec<Mutex<RecvChan>>>, + pkt_tx: mpsc::UnboundedSender<InPkt>, + udp_rx: R, +} + +mod prelude { + pub const PROTO_ID: u32 = 0x4f457403; + pub const UDP_PKT_SIZE: usize = 512; + pub const NUM_CHANS: usize = 3; + pub const REL_BUFFER: usize = 0x8000; + pub const INIT_SEQNUM: u16 = 65500; + pub const TIMEOUT: u64 = 30; + pub const PING_TIMEOUT: u64 = 5; + + pub use super::{ + client::{connect, Sender as Client}, + error::Error, + new::new, + CtlType, InPkt, PeerID, Pkt, PktType, RudpReceiver, RudpSender, UdpReceiver, UdpSender, + }; - // close either the receiver or the sender - // this shuts down associated tasks - rx.close().await; + #[macro_export] + macro_rules! ticker { + ($duration:expr, $close:expr, $body:block) => { + let mut interval = tokio::time::interval($duration); - Ok(()) + while tokio::select!{ + _ = interval.tick() => true, + _ = $close.changed() => false, + } $body + }; + } } @@ -1,4 +1,9 @@ -use crate::*; +use crate::{prelude::*, ticker, Chan, RecvWorker, RudpShare}; +use std::{collections::HashMap, io, sync::Arc, time::Duration}; +use tokio::{ + sync::{mpsc, watch, Mutex, RwLock}, + task::JoinSet, +}; pub async fn new<S: UdpSender, R: UdpReceiver>( id: u16, @@ -33,7 +38,7 @@ pub async fn new<S: UdpSender, R: UdpReceiver>( /*.build_task() .name("recv")*/ .spawn(async move { - let worker = recv::RecvWorker::new(udp_rx, recv_share, recv_close, pkt_tx); + let worker = RecvWorker::new(udp_rx, recv_share, recv_close, pkt_tx); worker.run().await; }); diff --git a/src/recv.rs b/src/recv.rs index 2fabe3a..e3d3e6b 100644 --- a/src/recv.rs +++ b/src/recv.rs @@ -1,6 +1,6 @@ -use crate::{error::Error, *}; +use crate::{prelude::*, ticker, RecvChan, RecvWorker, RudpShare, Split}; use async_recursion::async_recursion; -use byteorder::{BigEndian, ReadBytesExt}; +use byteorder::{BigEndian, ReadBytesExt, WriteBytesExt}; use std::{ cell::{Cell, OnceCell}, collections::HashMap, @@ -9,7 +9,7 @@ use std::{ sync::Arc, time::{Duration, Instant}, }; -use tokio::sync::{mpsc, Mutex}; +use tokio::sync::{mpsc, watch, Mutex}; fn to_seqnum(seqnum: u16) -> usize { (seqnum as usize) & (REL_BUFFER - 1) @@ -17,27 +17,6 @@ fn to_seqnum(seqnum: u16) -> usize { type Result<T> = std::result::Result<T, Error>; -struct Split { - timestamp: Option<Instant>, - chunks: Vec<OnceCell<Vec<u8>>>, - got: usize, -} - -struct RecvChan { - packets: Vec<Cell<Option<Vec<u8>>>>, // char ** 😛 - splits: HashMap<u16, Split>, - seqnum: u16, - num: u8, -} - -pub struct RecvWorker<R: UdpReceiver, S: UdpSender> { - share: Arc<RudpShare<S>>, - close: watch::Receiver<bool>, - chans: Arc<Vec<Mutex<RecvChan>>>, - pkt_tx: mpsc::UnboundedSender<InPkt>, - udp_rx: R, -} - impl<R: UdpReceiver, S: UdpSender> RecvWorker<R, S> { pub fn new( udp_rx: R, @@ -133,7 +112,6 @@ impl<R: UdpReceiver, S: UdpSender> RecvWorker<R, S> { ) -> Result<()> { use Error::*; - // TODO: reset timeout let mut cursor = io::Cursor::new(tokio::select! { pkt = self.udp_rx.recv() => pkt?, _ = tokio::time::sleep_until(timeout.deadline()) => return Err(RemoteDisco(true)), diff --git a/src/send.rs b/src/send.rs index 20308e6..c41ad80 100644 --- a/src/send.rs +++ b/src/send.rs @@ -1,4 +1,6 @@ -use crate::*; +use crate::{prelude::*, Ack, RudpShare}; +use byteorder::{BigEndian, WriteBytesExt}; +use std::io::{self, Write}; use tokio::sync::watch; type AckResult = io::Result<Option<watch::Receiver<bool>>>; @@ -50,6 +52,5 @@ impl<S: UdpSender> RudpShare<S> { pub async fn send_raw(&self, data: &[u8]) -> io::Result<()> { self.udp_tx.send(data).await - // TODO: reset ping timeout } } |