Initial commit - extracted urpc from monorepo

17 files changed, 1638 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..3a9c95e
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,22 @@
+# Rust build artifacts
+/target/
+Cargo.lock
+
+# IDE files
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+
+# OS generated files
+.DS_Store
+.DS_Store?
+._*
+.Spotlight-V100
+.Trashes
+ehthumbs.db
+Thumbs.db
+
+# Test artifacts
+hello.service
\ No newline at end of file
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..13032d9
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,26 @@
+[package]
+name = "urpc"
+version = "0.1.0"
+edition = "2021"
+authors = ["Your Name <[email protected]>"]
+description = "A minimalistic RPC framework for Rust"
+license = "MIT OR Apache-2.0"
+repository = "https://github.com/your-username/urpc"
+keywords = ["rpc", "async", "networking"]
+categories = ["network-programming", "asynchronous"]
+
+[workspace]
+members = ["urpc-macro"]
+
+[dependencies]
+urpc-macro = { path = "urpc-macro" }
+
+bincode = { version = "2.0.1", features = ["serde"] }
+bytes = { version = "1.10.1", features = ["serde"] }
+futures = "0.3.31"
+serde = { version = "1.0.219", features = ["derive"] }
+tokio = { version = "1.44.1", features = ["full"] }
+tokio-util = { version = "0.7.14", features = ["codec"] }
+
+[dev-dependencies]
+tokio-test = "0.4"
diff --git a/LICENSE-APACHE b/LICENSE-APACHE
new file mode 100644
index 0000000..1d9467e
--- /dev/null
+++ b/LICENSE-APACHE
@@ -0,0 +1,208 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
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+   11. Additional Terms. You may choose to offer, and to charge a fee for,
+      warranty, support, indemnity, or other obligations and/or rights
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+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
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+
+   Copyright 2025 urpc contributors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
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\ No newline at end of file
diff --git a/LICENSE-MIT b/LICENSE-MIT
new file mode 100644
index 0000000..c21a6e5
--- /dev/null
+++ b/LICENSE-MIT
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2025 urpc contributors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
\ No newline at end of file
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..6b84471
--- /dev/null
+++ b/README.md
@@ -0,0 +1,64 @@
+# urpc
+
+A minimalistic RPC framework for Rust, designed for simplicity and performance.
+
+## Features
+
+- Async/await support
+- TCP and Unix socket transport
+- Procedural macros for service definitions
+- Serialization with bincode
+- Lightweight and fast
+
+## Example
+
+```rust
+use urpc::*;
+
+#[urpc::service]
+trait Hello {
+    type Error = ();
+    
+    async fn hello(name: String) -> String;
+}
+
+struct HelloServer;
+
+impl Hello for HelloServer {
+    async fn hello(&self, _ctx: urpc::Context, name: String) -> Result<String, ()> {
+        Ok(format!("Hello, {}!", name))
+    }
+}
+
+#[tokio::main]
+async fn main() {
+    // Server
+    let listener = urpc::tcp::bind("127.0.0.1:8080").await.unwrap();
+    
+    tokio::spawn(async move {
+        urpc::Server::default()
+            .with_listener(listener)
+            .with_service(HelloServer.into_service())
+            .serve()
+            .await
+    });
+    
+    // Client
+    let channel = urpc::ClientChannel::new(
+        urpc::tcp::connect("127.0.0.1:8080").await.unwrap()
+    );
+    let client = HelloClient::new(channel);
+    
+    let response = client.hello("World".to_string()).await.unwrap();
+    println!("{}", response); // "Hello, World!"
+}
+```
+
+## License
+
+Licensed under either of
+
+- Apache License, Version 2.0
+- MIT License
+
+at your option.
\ No newline at end of file
diff --git a/src/channel.rs b/src/channel.rs
new file mode 100644
index 0000000..f80ca87
--- /dev/null
+++ b/src/channel.rs
@@ -0,0 +1,162 @@
+//! MPSC channel backed channel and listener implementations.
+//!
+//! This module provides an mpsc channel based listener/channel implementation that can be useful
+//! to for tests.
+//!
+//! The current implementation uses [`tokio`]'s unbounded mpsc channels.
+//!
+//! ```
+//! #[urpc::service]
+//! trait Hello {
+//!     type Error = ();
+//!
+//!     async fn hello(name: String) -> String;
+//! }
+//!
+//! struct HelloServer;
+//!
+//! impl Hello for HelloServer {
+//!     async fn hello(&self, _ctx: urpc::Context, name: String) -> Result<String, ()> {
+//!         Ok(format!("Hello, {name}!"))
+//!     }
+//! }
+//!
+//! #[tokio::main]
+//! async fn main() -> Result<(), Box<dyn std::error::Error>>{
+//!     let (dialer, listener) = urpc::channel::new();
+//!
+//!     // spawn the server
+//!     tokio::spawn(async move {
+//!         urpc::Server::default()
+//!             .with_listener(listener)
+//!             .with_service(HelloServer.into_service())
+//!             .serve()
+//!             .await
+//!     });
+//!
+//!     // create a client
+//!     let channel = urpc::ClientChannel::new(dialer.connect()?);
+//!     let client = HelloClient::new(channel);
+//!     let greeting = client.hello("World".into()).await.unwrap();
+//!     assert_eq!(greeting, "Hello, World!");
+//!     Ok(())
+//! }
+//! ```
+
+use futures::{Sink, Stream};
+use tokio::sync::mpsc;
+
+use crate::protocol::RpcMessage;
+
+pub struct ChannelListener {
+    receiver: mpsc::UnboundedReceiver<Channel>,
+}
+
+impl Stream for ChannelListener {
+    type Item = std::io::Result<Channel>;
+
+    fn poll_next(
+        self: std::pin::Pin<&mut Self>,
+        cx: &mut std::task::Context<'_>,
+    ) -> std::task::Poll<Option<Self::Item>> {
+        match self.get_mut().receiver.poll_recv(cx) {
+            std::task::Poll::Ready(Some(c)) => std::task::Poll::Ready(Some(Ok(c))),
+            std::task::Poll::Ready(None) => std::task::Poll::Ready(None),
+            std::task::Poll::Pending => std::task::Poll::Pending,
+        }
+    }
+}
+
+impl crate::Listener<Channel> for ChannelListener {}
+
+pub struct ChannelDialer {
+    sender: mpsc::UnboundedSender<Channel>,
+}
+
+impl ChannelDialer {
+    fn new() -> (Self, ChannelListener) {
+        let (sender, receiver) = mpsc::unbounded_channel();
+        (Self { sender }, ChannelListener { receiver })
+    }
+
+    pub fn connect(&self) -> std::io::Result<Channel> {
+        let (ch1, ch2) = Channel::new();
+        self.sender.send(ch1).expect("TODO: remove this");
+        Ok(ch2)
+    }
+}
+
+pub struct Channel {
+    sender: mpsc::UnboundedSender<RpcMessage>,
+    receiver: mpsc::UnboundedReceiver<RpcMessage>,
+}
+
+impl Channel {
+    fn new() -> (Self, Self) {
+        let (sender0, receiver0) = mpsc::unbounded_channel();
+        let (sender1, receiver1) = mpsc::unbounded_channel();
+        (
+            Self {
+                sender: sender0,
+                receiver: receiver1,
+            },
+            Self {
+                sender: sender1,
+                receiver: receiver0,
+            },
+        )
+    }
+}
+
+impl Stream for Channel {
+    type Item = std::io::Result<RpcMessage>;
+
+    fn poll_next(
+        self: std::pin::Pin<&mut Self>,
+        cx: &mut std::task::Context<'_>,
+    ) -> std::task::Poll<Option<Self::Item>> {
+        match self.get_mut().receiver.poll_recv(cx) {
+            std::task::Poll::Ready(Some(msg)) => std::task::Poll::Ready(Some(Ok(msg))),
+            std::task::Poll::Ready(None) => std::task::Poll::Ready(None),
+            std::task::Poll::Pending => std::task::Poll::Pending,
+        }
+    }
+}
+
+impl Sink<RpcMessage> for Channel {
+    type Error = std::io::Error;
+
+    fn poll_ready(
+        self: std::pin::Pin<&mut Self>,
+        _cx: &mut std::task::Context<'_>,
+    ) -> std::task::Poll<Result<(), Self::Error>> {
+        return std::task::Poll::Ready(Ok(()));
+    }
+
+    fn start_send(self: std::pin::Pin<&mut Self>, item: RpcMessage) -> Result<(), Self::Error> {
+        match self.sender.send(item) {
+            Ok(()) => Ok(()),
+            Err(err) => Err(std::io::Error::other(err)),
+        }
+    }
+
+    fn poll_flush(
+        self: std::pin::Pin<&mut Self>,
+        _cx: &mut std::task::Context<'_>,
+    ) -> std::task::Poll<Result<(), Self::Error>> {
+        std::task::Poll::Ready(Ok(()))
+    }
+
+    fn poll_close(
+        self: std::pin::Pin<&mut Self>,
+        _cx: &mut std::task::Context<'_>,
+    ) -> std::task::Poll<Result<(), Self::Error>> {
+        std::task::Poll::Ready(Ok(()))
+    }
+}
+
+impl crate::Channel for Channel {}
+
+pub fn new() -> (ChannelDialer, ChannelListener) {
+    ChannelDialer::new()
+}
diff --git a/src/client_channel.rs b/src/client_channel.rs
new file mode 100644
index 0000000..5666a16
--- /dev/null
+++ b/src/client_channel.rs
@@ -0,0 +1,124 @@
+use std::{collections::HashMap, sync::Arc};
+
+use bytes::Bytes;
+use futures::{SinkExt, StreamExt};
+use tokio::{
+    sync::{mpsc, oneshot},
+    task::AbortHandle,
+};
+
+use crate::{
+    Channel,
+    protocol::{RpcCall, RpcMessage, RpcResponse},
+};
+
+const CLIENT_CHANNEL_BUFFER_SIZE: usize = 64;
+
+struct ClientChannelMessage {
+    service: String,
+    method: String,
+    arguments: Bytes,
+    responder: oneshot::Sender<std::io::Result<Bytes>>,
+}
+
+struct ClientChannelInner {
+    sender: mpsc::Sender<ClientChannelMessage>,
+    abort_handle: AbortHandle,
+}
+
+impl Drop for ClientChannelInner {
+    fn drop(&mut self) {
+        self.abort_handle.abort();
+    }
+}
+
+#[derive(Clone)]
+pub struct ClientChannel(Arc<ClientChannelInner>);
+
+impl ClientChannel {
+    pub fn new<C: Channel>(channel: C) -> Self {
+        let (tx, rx) = mpsc::channel(CLIENT_CHANNEL_BUFFER_SIZE);
+        let abort_handle = tokio::spawn(client_channel_loop(channel, rx)).abort_handle();
+        Self(Arc::new(ClientChannelInner {
+            sender: tx,
+            abort_handle,
+        }))
+    }
+
+    pub async fn call(
+        &self,
+        service: String,
+        method: String,
+        arguments: Bytes,
+    ) -> std::io::Result<Bytes> {
+        let (tx, rx) = oneshot::channel();
+        self.0
+            .sender
+            .send(ClientChannelMessage {
+                service,
+                method,
+                arguments,
+                responder: tx,
+            })
+            .await
+            .expect("client channel task should never shutdown while a client is alive");
+        rx.await
+            .expect("client channel task should never shutdown while a client is alive")
+    }
+}
+
+async fn client_channel_loop<C: Channel>(
+    mut channel: C,
+    mut rx: mpsc::Receiver<ClientChannelMessage>,
+) {
+    enum Select {
+        RpcMessage(RpcMessage),
+        ClientChannelMessage(ClientChannelMessage),
+    }
+
+    let mut responders = HashMap::<u64, oneshot::Sender<std::io::Result<Bytes>>>::default();
+    let mut rpc_call_id = 0;
+
+    loop {
+        let select = tokio::select! {
+            Some(Ok(v)) = channel.next() => Select::RpcMessage(v),
+            Some(v) = rx.recv() => Select::ClientChannelMessage(v),
+        };
+
+        match select {
+            Select::RpcMessage(RpcMessage::Response(RpcResponse { id, value })) => {
+                if let Some(responder) = responders.remove(&id) {
+                    let _ = responder.send(Ok(value));
+                }
+            }
+            Select::RpcMessage(_) => todo!(),
+            Select::ClientChannelMessage(ClientChannelMessage {
+                service,
+                method,
+                arguments,
+                responder,
+            }) => {
+                let id = rpc_call_id;
+                rpc_call_id += 1;
+
+                let result = channel
+                    .send(RpcMessage::Call(RpcCall {
+                        id,
+                        service,
+                        method,
+                        arguments,
+                    }))
+                    .await;
+
+                match result {
+                    Ok(()) => {
+                        responders.insert(id, responder);
+                    }
+                    Err(err) => {
+                        let _ = responder.send(Err(err));
+                    }
+                }
+            }
+        }
+    }
+}
diff --git a/src/internal.rs b/src/internal.rs
new file mode 100644
index 0000000..a3c203a
--- /dev/null
+++ b/src/internal.rs
@@ -0,0 +1,2 @@
+pub use bincode;
+pub use bytes;
diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 0000000..e65f659
--- /dev/null
+++ b/src/lib.rs
@@ -0,0 +1,52 @@
+#[doc(hidden)]
+pub mod internal;
+
+pub mod channel;
+pub mod protocol;
+pub mod tcp;
+pub mod unix;
+
+mod client_channel;
+mod server;
+
+pub use client_channel::ClientChannel;
+pub use server::Server;
+pub use urpc_macro::service;
+
+use protocol::RpcMessage;
+
+use std::pin::Pin;
+use std::future::Future;
+
+use bytes::Bytes;
+use futures::{Sink, Stream};
+
+#[derive(Debug, Default)]
+pub struct Context;
+
+pub trait Service: Send + Sync + 'static {
+    fn name() -> &'static str
+    where
+        Self: Sized;
+
+    fn call(
+        &self,
+        method: String,
+        arguments: Bytes,
+    ) -> Pin<Box<dyn Future<Output = std::io::Result<Bytes>> + Send + '_>>;
+}
+
+pub trait Channel:
+    Stream<Item = std::io::Result<RpcMessage>>
+    + Sink<RpcMessage, Error = std::io::Error>
+    + Send
+    + Unpin
+    + 'static
+{
+}
+
+pub trait Listener<C>: Stream<Item = std::io::Result<C>> + Send + Unpin + 'static
+where
+    C: Channel,
+{
+}
diff --git a/src/protocol.rs b/src/protocol.rs
new file mode 100644
index 0000000..baf886b
--- /dev/null
+++ b/src/protocol.rs
@@ -0,0 +1,107 @@
+//! Types used by the RPC protocol.
+use bytes::Bytes;
+use serde::{Deserialize, Serialize};
+use tokio_util::codec::{Decoder, Encoder, LengthDelimitedCodec};
+
+#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
+pub struct RpcCall {
+    pub id: u64,
+    pub service: String,
+    pub method: String,
+    pub arguments: Bytes,
+}
+
+#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
+pub struct RpcCancel {
+    pub id: u64,
+}
+
+#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
+pub struct RpcResponse {
+    pub id: u64,
+    pub value: Bytes,
+}
+
+#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
+pub enum RpcMessage {
+    Call(RpcCall),
+    Response(RpcResponse),
+    Cancel(RpcCancel),
+}
+
+#[derive(Debug)]
+pub enum RpcError<E> {
+    Transport(std::io::Error),
+    Remote(E),
+}
+
+impl<E> std::fmt::Display for RpcError<E>
+where
+    E: std::fmt::Display,
+{
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            RpcError::Transport(error) => write!(f, "transport error: {error}"),
+            RpcError::Remote(error) => write!(f, "remote error: {error}"),
+        }
+    }
+}
+
+impl<E> std::error::Error for RpcError<E>
+where
+    E: std::error::Error,
+{
+    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
+        match self {
+            RpcError::Transport(error) => error.source(),
+            RpcError::Remote(error) => error.source(),
+        }
+    }
+}
+
+impl<E> From<std::io::Error> for RpcError<E> {
+    fn from(value: std::io::Error) -> Self {
+        Self::Transport(value)
+    }
+}
+
+#[derive(Default)]
+pub struct RpcMessageCodec(LengthDelimitedCodec);
+
+impl Encoder<RpcMessage> for RpcMessageCodec {
+    type Error = std::io::Error;
+
+    fn encode(
+        &mut self,
+        item: RpcMessage,
+        dst: &mut bytes::BytesMut,
+    ) -> std::result::Result<(), Self::Error> {
+        let encoded = bincode::serde::encode_to_vec(&item, bincode::config::standard())
+            .map_err(std::io::Error::other)?;
+        let encoded = Bytes::from(encoded);
+        self.0.encode(encoded, dst).map_err(std::io::Error::other)?;
+        Ok(())
+    }
+}
+
+impl Decoder for RpcMessageCodec {
+    type Item = RpcMessage;
+
+    type Error = std::io::Error;
+
+    fn decode(
+        &mut self,
+        src: &mut bytes::BytesMut,
+    ) -> std::result::Result<Option<Self::Item>, Self::Error> {
+        match self.0.decode(src) {
+            Ok(Some(frame)) => {
+                let (message, _) =
+                    bincode::serde::decode_from_slice(&frame, bincode::config::standard())
+                        .map_err(std::io::Error::other)?;
+                Ok(Some(message))
+            }
+            Ok(None) => Ok(None),
+            Err(err) => Err(std::io::Error::other(err)),
+        }
+    }
+}
diff --git a/src/server.rs b/src/server.rs
new file mode 100644
index 0000000..414340e
--- /dev/null
+++ b/src/server.rs
@@ -0,0 +1,166 @@
+use std::{collections::HashMap, sync::Arc};
+
+use futures::{SinkExt, StreamExt};
+use tokio::task::{AbortHandle, JoinSet};
+
+use crate::{
+    Channel, Listener, Service,
+    protocol::{RpcCall, RpcCancel, RpcMessage, RpcResponse},
+};
+
+#[derive(Clone)]
+struct Services(Arc<HashMap<String, Arc<dyn Service>>>);
+
+impl Services {
+    fn new(services: HashMap<String, Arc<dyn Service>>) -> Self {
+        Self(Arc::new(services))
+    }
+
+    fn get_service(&self, name: &str) -> std::io::Result<Arc<dyn Service>> {
+        match self.0.get(name) {
+            Some(service) => Ok(service.clone()),
+            None => Err(std::io::Error::new(
+                std::io::ErrorKind::NotFound,
+                "service not found",
+            )),
+        }
+    }
+}
+
+type ListenerSpawner =
+    Box<dyn FnOnce(&mut JoinSet<std::io::Result<()>>, Services) -> AbortHandle + Send + 'static>;
+
+#[derive(Debug, Default)]
+struct AbortHandles(Vec<AbortHandle>);
+
+impl Drop for AbortHandles {
+    fn drop(&mut self) {
+        for handle in &self.0 {
+            handle.abort();
+        }
+    }
+}
+
+impl AbortHandles {
+    pub fn push(&mut self, handle: AbortHandle) {
+        self.0.push(handle);
+    }
+}
+
+#[derive(Default)]
+pub struct Server {
+    services: HashMap<String, Arc<dyn Service>>,
+    listener_spawners: Vec<ListenerSpawner>,
+}
+
+impl Server {
+    pub fn with_service<T>(mut self, service: T) -> Self
+    where
+        T: Service,
+    {
+        let name = T::name();
+        let service = Arc::new(service);
+        self.services.insert(name.to_string(), service);
+        self
+    }
+
+    pub fn with_listener<L, C>(mut self, listener: L) -> Self
+    where
+        C: Channel,
+        L: Listener<C>,
+    {
+        self.listener_spawners
+            .push(Box::new(move |join_set, services| {
+                join_set.spawn(listener_loop(listener, services))
+            }));
+        self
+    }
+
+    pub async fn serve(self) -> std::io::Result<()> {
+        let services = Services::new(self.services);
+        let mut join_set = JoinSet::default();
+        let mut abort_handles = AbortHandles::default();
+        for spawner in self.listener_spawners {
+            let abort_handle = (spawner)(&mut join_set, services.clone());
+            abort_handles.push(abort_handle);
+        }
+        match join_set.join_next().await {
+            Some(Ok(Ok(()))) => Ok(()),
+            Some(Ok(Err(err))) => Err(err),
+            Some(Err(err)) => Err(std::io::Error::other(err)),
+            None => Ok(()),
+        }
+    }
+}
+
+async fn listener_loop<L, C>(mut listener: L, services: Services) -> std::io::Result<()>
+where
+    C: Channel,
+    L: Listener<C>,
+{
+    while let Some(result) = listener.next().await {
+        let channel = result?;
+        let services = services.clone();
+        tokio::spawn(channel_handler(channel, services));
+    }
+    Ok(())
+}
+
+async fn channel_handler<C: Channel>(mut channel: C, services: Services) -> std::io::Result<()> {
+    enum Select {
+        Empty,
+        Message(RpcMessage),
+    }
+
+    let (response_tx, mut response_rx) =
+        tokio::sync::mpsc::unbounded_channel::<std::io::Result<RpcResponse>>();
+    let mut requests: HashMap<u64, AbortHandle> = Default::default();
+    loop {
+        let select = tokio::select! {
+            reqopt = channel.next() => match reqopt {
+                Some(Ok(message)) => Select::Message(message),
+                Some(Err(err)) => return Err(err),
+                None => Select::Empty,
+            },
+            Some(response) = response_rx.recv() => match response {
+                Ok(response) => Select::Message(RpcMessage::Response(response)),
+                Err(err) => return Err(err),
+            }
+        };
+
+        match select {
+            Select::Empty => break,
+            Select::Message(message) => match message {
+                RpcMessage::Call(RpcCall {
+                    id,
+                    service,
+                    method,
+                    arguments,
+                }) => {
+                    let response_tx = response_tx.clone();
+                    let service = services.get_service(&service)?;
+                    let handle = tokio::spawn(async move {
+                        let response = match service.call(method, arguments).await {
+                            Ok(value) => Ok(RpcResponse { id, value }),
+                            Err(err) => Err(err),
+                        };
+                        let _ = response_tx.send(response);
+                    })
+                    .abort_handle();
+                    requests.insert(id, handle);
+                }
+                RpcMessage::Cancel(RpcCancel { id }) => {
+                    if let Some(handle) = requests.remove(&id) {
+                        handle.abort();
+                    }
+                }
+                RpcMessage::Response(response) => {
+                    requests.remove(&response.id);
+                    channel.send(RpcMessage::Response(response)).await?;
+                }
+            },
+        }
+    }
+
+    Ok(())
+}
diff --git a/src/tcp.rs b/src/tcp.rs
new file mode 100644
index 0000000..5684c41
--- /dev/null
+++ b/src/tcp.rs
@@ -0,0 +1,156 @@
+//! TCP backed channel and listener implementations.
+//!
+//! ```no_run
+//! #[urpc::service]
+//! trait Hello {
+//!     type Error = ();
+//!
+//!     async fn hello(name: String) -> String;
+//! }
+//!
+//! struct HelloServer;
+//!
+//! impl Hello for HelloServer {
+//!     async fn hello(&self, _ctx: urpc::Context, name: String) -> Result<String, ()> {
+//!         Ok(format!("Hello, {name}!"))
+//!     }
+//! }
+//!
+//! #[tokio::main]
+//! async fn main() -> Result<(), Box<dyn std::error::Error>>{
+//!     let listener = urpc::tcp::bind("0.0.0.0:3000").await?;
+//!
+//!     // spawn the server
+//!     tokio::spawn(async move {
+//!         urpc::Server::default()
+//!             .with_listener(listener)
+//!             .with_service(HelloServer.into_service())
+//!             .serve()
+//!             .await
+//!     });
+//!
+//!     // create a client
+//!     let channel = urpc::ClientChannel::new(urpc::tcp::connect("127.0.0.1:3000").await?);
+//!     let client = HelloClient::new(channel);
+//!     let greeting = client.hello("World".into()).await.unwrap();
+//!     assert_eq!(greeting, "Hello, World!");
+//!     Ok(())
+//! }
+//! ```
+use std::pin::Pin;
+
+use futures::{Sink, Stream};
+use tokio::{
+    net::{TcpListener, TcpStream, ToSocketAddrs},
+    sync::mpsc::Receiver,
+    task::AbortHandle,
+};
+use tokio_util::codec::Framed;
+
+use crate::{
+    Channel, Listener,
+    protocol::{RpcMessage, RpcMessageCodec},
+};
+
+pub struct TcpChannel(Framed<TcpStream, RpcMessageCodec>);
+
+impl TcpChannel {
+    fn new(stream: TcpStream) -> Self {
+        Self(Framed::new(stream, RpcMessageCodec::default()))
+    }
+
+    pub async fn connect(addrs: impl ToSocketAddrs) -> std::io::Result<Self> {
+        let stream = TcpStream::connect(addrs).await?;
+        Ok(Self::new(stream))
+    }
+}
+
+impl Sink<RpcMessage> for TcpChannel {
+    type Error = std::io::Error;
+
+    fn poll_ready(
+        self: Pin<&mut Self>,
+        cx: &mut std::task::Context<'_>,
+    ) -> std::task::Poll<std::result::Result<(), Self::Error>> {
+        Sink::poll_ready(Pin::new(&mut self.get_mut().0), cx)
+    }
+
+    fn start_send(self: Pin<&mut Self>, item: RpcMessage) -> std::result::Result<(), Self::Error> {
+        Sink::start_send(Pin::new(&mut self.get_mut().0), item)
+    }
+
+    fn poll_flush(
+        self: Pin<&mut Self>,
+        cx: &mut std::task::Context<'_>,
+    ) -> std::task::Poll<std::result::Result<(), Self::Error>> {
+        Sink::poll_flush(Pin::new(&mut self.get_mut().0), cx)
+    }
+
+    fn poll_close(
+        self: Pin<&mut Self>,
+        cx: &mut std::task::Context<'_>,
+    ) -> std::task::Poll<std::result::Result<(), Self::Error>> {
+        Sink::poll_close(Pin::new(&mut self.get_mut().0), cx)
+    }
+}
+
+impl Stream for TcpChannel {
+    type Item = std::io::Result<RpcMessage>;
+
+    fn poll_next(
+        self: Pin<&mut Self>,
+        cx: &mut std::task::Context<'_>,
+    ) -> std::task::Poll<Option<Self::Item>> {
+        Stream::poll_next(Pin::new(&mut self.get_mut().0), cx)
+    }
+}
+
+impl Channel for TcpChannel {}
+
+pub struct TcpChannelListener {
+    receiver: Receiver<TcpChannel>,
+    abort: AbortHandle,
+}
+
+impl Drop for TcpChannelListener {
+    fn drop(&mut self) {
+        self.abort.abort();
+    }
+}
+
+impl TcpChannelListener {
+    pub async fn bind(addrs: impl ToSocketAddrs) -> std::io::Result<Self> {
+        let listener = TcpListener::bind(addrs).await?;
+        let (sender, receiver) = tokio::sync::mpsc::channel(8);
+        let abort = tokio::spawn(async move {
+            while let Ok((stream, _addr)) = listener.accept().await {
+                if sender.send(TcpChannel::new(stream)).await.is_err() {
+                    break;
+                }
+            }
+        })
+        .abort_handle();
+        Ok(Self { receiver, abort })
+    }
+}
+
+impl Stream for TcpChannelListener {
+    type Item = std::io::Result<TcpChannel>;
+
+    fn poll_next(
+        self: Pin<&mut Self>,
+        cx: &mut std::task::Context<'_>,
+    ) -> std::task::Poll<Option<Self::Item>> {
+        self.get_mut().receiver.poll_recv(cx).map(|v| v.map(Ok))
+    }
+}
+
+impl Listener<TcpChannel> for TcpChannelListener {}
+
+pub async fn bind(addrs: impl ToSocketAddrs) -> std::io::Result<TcpChannelListener> {
+    TcpChannelListener::bind(addrs).await
+}
+
+pub async fn connect(addrs: impl ToSocketAddrs) -> std::io::Result<TcpChannel> {
+    TcpChannel::connect(addrs).await
+}
diff --git a/src/unix.rs b/src/unix.rs
new file mode 100644
index 0000000..e241b64
--- /dev/null
+++ b/src/unix.rs
@@ -0,0 +1,160 @@
+//! UNIX Domain Socket backed channel and listener implementations.
+//!
+//! ```no_run
+//! #[urpc::service]
+//! trait Hello {
+//!     type Error = ();
+//!
+//!     async fn hello(name: String) -> String;
+//! }
+//!
+//! struct HelloServer;
+//!
+//! impl Hello for HelloServer {
+//!     async fn hello(&self, _ctx: urpc::Context, name: String) -> Result<String, ()> {
+//!         Ok(format!("Hello, {name}!"))
+//!     }
+//! }
+//!
+//! #[tokio::main]
+//! async fn main() -> Result<(), Box<dyn std::error::Error>>{
+//!     let listener = urpc::unix::bind("./hello.service").await?;
+//!
+//!     // spawn the server
+//!     tokio::spawn(async move {
+//!         urpc::Server::default()
+//!             .with_listener(listener)
+//!             .with_service(HelloServer.into_service())
+//!             .serve()
+//!             .await
+//!     });
+//!
+//!     // create a client
+//!     let channel = urpc::ClientChannel::new(urpc::unix::connect("./hello.service").await?);
+//!     let client = HelloClient::new(channel);
+//!     let greeting = client.hello("World".into()).await.unwrap();
+//!     assert_eq!(greeting, "Hello, World!");
+//!     Ok(())
+//! }
+//! ```
+use std::{path::Path, pin::Pin};
+
+use futures::{Sink, Stream};
+use tokio::{
+    net::{UnixListener, UnixStream},
+    sync::mpsc::Receiver,
+    task::AbortHandle,
+};
+use tokio_util::codec::Framed;
+
+use crate::{
+    Channel, Listener,
+    protocol::{RpcMessage, RpcMessageCodec},
+};
+
+pub struct UnixChannel(Framed<UnixStream, RpcMessageCodec>);
+
+impl UnixChannel {
+    fn new(stream: UnixStream) -> Self {
+        Self(Framed::new(stream, RpcMessageCodec::default()))
+    }
+
+    pub async fn connect(path: impl AsRef<Path>) -> std::io::Result<Self> {
+        let stream = UnixStream::connect(path).await?;
+        Ok(Self::new(stream))
+    }
+}
+
+impl Sink<RpcMessage> for UnixChannel {
+    type Error = std::io::Error;
+
+    fn poll_ready(
+        self: Pin<&mut Self>,
+        cx: &mut std::task::Context<'_>,
+    ) -> std::task::Poll<std::result::Result<(), Self::Error>> {
+        Sink::poll_ready(Pin::new(&mut self.get_mut().0), cx)
+    }
+
+    fn start_send(self: Pin<&mut Self>, item: RpcMessage) -> std::result::Result<(), Self::Error> {
+        Sink::start_send(Pin::new(&mut self.get_mut().0), item)
+    }
+
+    fn poll_flush(
+        self: Pin<&mut Self>,
+        cx: &mut std::task::Context<'_>,
+    ) -> std::task::Poll<std::result::Result<(), Self::Error>> {
+        Sink::poll_flush(Pin::new(&mut self.get_mut().0), cx)
+    }
+
+    fn poll_close(
+        self: Pin<&mut Self>,
+        cx: &mut std::task::Context<'_>,
+    ) -> std::task::Poll<std::result::Result<(), Self::Error>> {
+        Sink::poll_close(Pin::new(&mut self.get_mut().0), cx)
+    }
+}
+
+impl Stream for UnixChannel {
+    type Item = std::io::Result<RpcMessage>;
+
+    fn poll_next(
+        self: Pin<&mut Self>,
+        cx: &mut std::task::Context<'_>,
+    ) -> std::task::Poll<Option<Self::Item>> {
+        Stream::poll_next(Pin::new(&mut self.get_mut().0), cx)
+    }
+}
+
+impl Channel for UnixChannel {}
+
+pub struct UnixChannelListener {
+    receiver: Receiver<UnixChannel>,
+    abort: AbortHandle,
+}
+
+impl Drop for UnixChannelListener {
+    fn drop(&mut self) {
+        self.abort.abort();
+    }
+}
+
+impl UnixChannelListener {
+    pub async fn bind(path: impl AsRef<Path>) -> std::io::Result<Self> {
+        let path = path.as_ref();
+        if tokio::fs::try_exists(path).await? {
+            tokio::fs::remove_file(path).await?;
+        }
+        let listener = UnixListener::bind(path)?;
+        let (sender, receiver) = tokio::sync::mpsc::channel(8);
+        let abort = tokio::spawn(async move {
+            while let Ok((stream, _addr)) = listener.accept().await {
+                if sender.send(UnixChannel::new(stream)).await.is_err() {
+                    break;
+                }
+            }
+        })
+        .abort_handle();
+        Ok(Self { receiver, abort })
+    }
+}
+
+impl Stream for UnixChannelListener {
+    type Item = std::io::Result<UnixChannel>;
+
+    fn poll_next(
+        self: Pin<&mut Self>,
+        cx: &mut std::task::Context<'_>,
+    ) -> std::task::Poll<Option<Self::Item>> {
+        self.get_mut().receiver.poll_recv(cx).map(|v| v.map(Ok))
+    }
+}
+
+impl Listener<UnixChannel> for UnixChannelListener {}
+
+pub async fn bind(path: impl AsRef<Path>) -> std::io::Result<UnixChannelListener> {
+    UnixChannelListener::bind(path).await
+}
+
+pub async fn connect(path: impl AsRef<Path>) -> std::io::Result<UnixChannel> {
+    UnixChannel::connect(path).await
+}
diff --git a/tests/tcp.rs b/tests/tcp.rs
new file mode 100644
index 0000000..a2f647d
--- /dev/null
+++ b/tests/tcp.rs
@@ -0,0 +1,34 @@
+#[tokio::test]
+async fn test_hello_service() {
+    #[urpc::service]
+    trait Hello {
+        type Error = ();
+
+        async fn hello(name: String) -> String;
+    }
+
+    struct HelloServer;
+
+    impl Hello for HelloServer {
+        async fn hello(&self, _ctx: urpc::Context, name: String) -> Result<String, ()> {
+            Ok(format!("Hello, {name}!"))
+        }
+    }
+
+    let listener = urpc::tcp::bind("0.0.0.0:3000").await.unwrap();
+
+    // spawn the server
+    tokio::spawn(async move {
+        urpc::Server::default()
+            .with_listener(listener)
+            .with_service(HelloServer.into_service())
+            .serve()
+            .await
+    });
+
+    // create a client
+    let channel = urpc::ClientChannel::new(urpc::tcp::connect("127.0.0.1:3000").await.unwrap());
+    let client = HelloClient::new(channel);
+    let greeting = client.hello("World".into()).await.unwrap();
+    assert_eq!(greeting, "Hello, World!");
+}
diff --git a/tests/unix.rs b/tests/unix.rs
new file mode 100644
index 0000000..bfa5a69
--- /dev/null
+++ b/tests/unix.rs
@@ -0,0 +1,34 @@
+#[tokio::test]
+async fn test_hello_service() {
+    #[urpc::service]
+    trait Hello {
+        type Error = ();
+
+        async fn hello(name: String) -> String;
+    }
+
+    struct HelloServer;
+
+    impl Hello for HelloServer {
+        async fn hello(&self, _ctx: urpc::Context, name: String) -> Result<String, ()> {
+            Ok(format!("Hello, {name}!"))
+        }
+    }
+
+    let listener = urpc::unix::bind("./hello.service").await.unwrap();
+
+    // spawn the server
+    tokio::spawn(async move {
+        urpc::Server::default()
+            .with_listener(listener)
+            .with_service(HelloServer.into_service())
+            .serve()
+            .await
+    });
+
+    // create a client
+    let channel = urpc::ClientChannel::new(urpc::unix::connect("./hello.service").await.unwrap());
+    let client = HelloClient::new(channel);
+    let greeting = client.hello("World".into()).await.unwrap();
+    assert_eq!(greeting, "Hello, World!");
+}
diff --git a/urpc-macro/Cargo.toml b/urpc-macro/Cargo.toml
new file mode 100644
index 0000000..16b5650
--- /dev/null
+++ b/urpc-macro/Cargo.toml
@@ -0,0 +1,18 @@
+[package]
+name = "urpc-macro"
+version = "0.1.0"
+edition = "2021"
+authors = ["Your Name <[email protected]>"]
+description = "Procedural macros for urpc"
+license = "MIT OR Apache-2.0"
+repository = "https://github.com/your-username/urpc"
+keywords = ["rpc", "async", "networking", "macros"]
+categories = ["network-programming", "asynchronous"]
+
+[lib]
+proc-macro = true
+
+[dependencies]
+proc-macro2 = "1.0.95"
+quote = "1.0.40"
+syn = { version = "2.0.101", features = ["full"] }
diff --git a/urpc-macro/src/lib.rs b/urpc-macro/src/lib.rs
new file mode 100644
index 0000000..4facc60
--- /dev/null
+++ b/urpc-macro/src/lib.rs
@@ -0,0 +1,282 @@
+use proc_macro2::{Punct, Spacing, Span, TokenStream};
+use quote::{ToTokens, TokenStreamExt};
+use syn::parse::Parse;
+
+struct Service {
+    vis: syn::Visibility,
+    ident: syn::Ident,
+    error: syn::Type,
+    methods: Vec<Method>,
+}
+
+impl Service {
+    fn server_trait_ident(&self) -> syn::Ident {
+        self.ident.clone()
+    }
+
+    fn client_struct_ident(&self) -> syn::Ident {
+        syn::Ident::new(&format!("{}Client", self.ident), Span::call_site())
+    }
+}
+
+impl Parse for Service {
+    fn parse(input: syn::parse::ParseStream) -> syn::Result<Self> {
+        let vis = input.parse()?;
+        input.parse::<syn::Token![trait]>()?;
+        let ident = input.parse()?;
+
+        let content;
+        syn::braced!(content in input);
+
+        content.parse::<syn::Token![type]>()?;
+        let error_ident = content.parse::<syn::Ident>()?;
+        if error_ident != "Error" {
+            return Err(syn::Error::new_spanned(
+                error_ident,
+                "expected Error associated type",
+            ));
+        }
+        content.parse::<syn::Token![=]>()?;
+        let error = content.parse()?;
+        content.parse::<syn::Token![;]>()?;
+
+        let mut methods = Vec::default();
+        while !content.is_empty() {
+            let method = content.parse()?;
+            methods.push(method);
+        }
+
+        Ok(Self {
+            vis,
+            ident,
+            error,
+            methods,
+        })
+    }
+}
+
+struct MethodArg {
+    ident: syn::Ident,
+    ty: syn::Type,
+}
+
+impl ToTokens for MethodArg {
+    fn to_tokens(&self, tokens: &mut TokenStream) {
+        self.ident.to_tokens(tokens);
+        tokens.append(Punct::new(':', Spacing::Alone));
+        self.ty.to_tokens(tokens);
+    }
+}
+
+impl Parse for MethodArg {
+    fn parse(input: syn::parse::ParseStream) -> syn::Result<Self> {
+        let ident = input.parse()?;
+        input.parse::<syn::Token![:]>()?;
+        let ty = input.parse()?;
+        Ok(Self { ident, ty })
+    }
+}
+
+struct Method {
+    ident: syn::Ident,
+    arguments: Vec<MethodArg>,
+    return_ty: Option<syn::Type>,
+}
+
+impl Parse for Method {
+    fn parse(input: syn::parse::ParseStream) -> syn::Result<Self> {
+        input.parse::<syn::Token![async]>()?;
+        input.parse::<syn::Token![fn]>()?;
+        let ident = input.parse::<syn::Ident>()?;
+        let arguments_content;
+        syn::parenthesized!(arguments_content in input);
+
+        let mut arguments = Vec::default();
+        while !arguments_content.is_empty() {
+            if !arguments.is_empty() {
+                arguments_content.parse::<syn::Token![,]>()?;
+            }
+            let argument = arguments_content.parse::<MethodArg>()?;
+            arguments.push(argument);
+        }
+
+        let return_ty = match input.peek(syn::Token![->]) {
+            true => {
+                input.parse::<syn::Token![->]>()?;
+                Some(input.parse()?)
+            }
+            false => None,
+        };
+
+        input.parse::<syn::Token![;]>()?;
+
+        Ok(Self {
+            ident,
+            arguments,
+            return_ty,
+        })
+    }
+}
+
+fn generate_service_into_service_match_arm(service: &Service, method: &Method) -> TokenStream {
+    let method_ident = &method.ident;
+    let method_name = method.ident.to_string();
+    let server_trait = service.server_trait_ident();
+    let arg_idents = method
+        .arguments
+        .iter()
+        .map(|arg| &arg.ident)
+        .collect::<Vec<_>>();
+
+    quote::quote! {
+        #method_name => {
+            let ((#(#arg_idents),*), _) =
+                urpc::internal::bincode::serde::decode_from_slice(&arguments, urpc::internal::bincode::config::standard()).map_err(std::io::Error::other)?;
+            let ctx = Default::default();
+            let ret = <T as #server_trait>::#method_ident(&self.0, ctx, #(#arg_idents),*).await;
+            let value = urpc::internal::bincode::serde::encode_to_vec(&ret, urpc::internal::bincode::config::standard()).map_err(std::io::Error::other)?;
+            Ok(From::from(value))
+        }
+    }
+}
+
+fn generate_service_into_service(service: &Service) -> TokenStream {
+    let server_trait = service.server_trait_ident();
+    let service_name = service.ident.to_string();
+    let match_arms = service
+        .methods
+        .iter()
+        .map(|m| generate_service_into_service_match_arm(service, m))
+        .collect::<Vec<_>>();
+    quote::quote! {
+        fn into_service(self) -> impl urpc::Service {
+            struct Adapter<T>(T);
+
+            impl<T> urpc::Service for Adapter<T>
+            where
+                T: #server_trait,
+            {
+                fn name() -> &'static str {
+                    #service_name
+                }
+
+                fn call(
+                    &self,
+                    method: String,
+                    arguments: urpc::internal::bytes::Bytes,
+                ) -> std::pin::Pin<Box<dyn std::future::Future<Output = std::io::Result<urpc::internal::bytes::Bytes>> + Send + '_>> {
+                    Box::pin(async move {
+                        match method.as_str() {
+                            #(#match_arms)*
+                            _ => panic!("unknown method for service {}", "Router"),
+                        }
+                    })
+                }
+            }
+
+            Adapter(self)
+        }
+    }
+}
+
+fn generate_service_server_method(service: &Service, method: &Method) -> TokenStream {
+    let ident = &method.ident;
+    let service_error = &service.error;
+    let args = &method.arguments;
+    let return_ty = match &method.return_ty {
+        Some(t) => quote::quote! { std::result::Result<#t, #service_error> },
+        None => quote::quote! { std::result::Result<(), #service_error> },
+    };
+    quote::quote! {
+        fn #ident(&self, ctx: urpc::Context, #(#args),*) -> impl std::future::Future<Output = #return_ty> + Send;
+    }
+}
+
+fn generate_service_server(service: &Service) -> TokenStream {
+    let vis = &service.vis;
+    let ident = service.server_trait_ident();
+    let methods = service
+        .methods
+        .iter()
+        .map(|m| generate_service_server_method(service, m));
+    let into_service = generate_service_into_service(service);
+
+    quote::quote! {
+        #vis trait #ident : Sized + Send + Sync + 'static {
+            #(#methods)*
+            #into_service
+        }
+    }
+}
+
+fn generate_service_client_method(service: &Service, method: &Method) -> TokenStream {
+    let service_name = service.ident.to_string();
+    let service_error = &service.error;
+    let method_ident = &method.ident;
+    let method_string = method.ident.to_string();
+    let method_arg_idents = method
+        .arguments
+        .iter()
+        .map(|arg| &arg.ident)
+        .collect::<Vec<_>>();
+    let method_arg_types = method.arguments.iter().map(|arg| &arg.ty);
+    let method_return_type = match &method.return_ty {
+        Some(ty) => quote::quote! { #ty },
+        None => quote::quote! { () },
+    };
+    quote::quote! {
+        pub async fn #method_ident(&self, #(#method_arg_idents: #method_arg_types),*) -> std::result::Result<#method_return_type, urpc::protocol::RpcError<#service_error>> {
+            let service = String::from(#service_name);
+            let method = String::from(#method_string);
+            let arguments = (#(#method_arg_idents),*);
+            let arguments = match urpc::internal::bincode::serde::encode_to_vec(&arguments, urpc::internal::bincode::config::standard()) {
+                Ok(arguments) => From::from(arguments),
+                Err(err) => return Err(urpc::protocol::RpcError::Transport(std::io::Error::other(err))),
+            };
+            let response = match self.channel.call(service, method, arguments).await {
+                Ok(response) => response,
+                Err(err) => return Err(urpc::protocol::RpcError::Transport(err)),
+            };
+            match urpc::internal::bincode::serde::decode_from_slice::<std::result::Result<#method_return_type, #service_error>, _>(&response, urpc::internal::bincode::config::standard()) {
+                Ok((result, _)) => result.map_err(urpc::protocol::RpcError::Remote),
+                Err(err) => Err(urpc::protocol::RpcError::Transport(std::io::Error::other(err))),
+            }
+        }
+    }
+}
+
+fn generate_service_client(service: &Service) -> TokenStream {
+    let vis = &service.vis;
+    let client_ident = service.client_struct_ident();
+    let methods = service
+        .methods
+        .iter()
+        .map(|m| generate_service_client_method(service, m));
+    quote::quote! {
+        #vis struct #client_ident {
+            channel: urpc::ClientChannel
+        }
+
+        impl #client_ident {
+            pub fn new(channel: urpc::ClientChannel) -> Self {
+                Self { channel }
+            }
+
+            #(#methods)*
+        }
+    }
+}
+
+#[proc_macro_attribute]
+pub fn service(
+    _attr: proc_macro::TokenStream,
+    item: proc_macro::TokenStream,
+) -> proc_macro::TokenStream {
+    let service = syn::parse_macro_input!(item as Service);
+    let service_server = generate_service_server(&service);
+    let service_client = generate_service_client(&service);
+    From::from(quote::quote! {
+        #service_server
+        #service_client
+    })
+}