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Implement basic networking code
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Kodi Craft 2024-06-21 15:54:48 +02:00
parent 971e185ae5
commit 06aa6a1f71
Signed by: kodi
GPG Key ID: 69D9EED60B242822
4 changed files with 259 additions and 4 deletions
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199
Cargo.lock generated
View File

@ -32,6 +32,27 @@ dependencies = [
"rustc-demangle",
]
[[package]]
name = "base64"
version = "0.21.7"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "9d297deb1925b89f2ccc13d7635fa0714f12c87adce1c75356b39ca9b7178567"
[[package]]
name = "bitflags"
version = "2.5.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "cf4b9d6a944f767f8e5e0db018570623c85f3d925ac718db4e06d0187adb21c1"
dependencies = [
"serde",
]
[[package]]
name = "bytes"
version = "1.6.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "514de17de45fdb8dc022b1a7975556c53c86f9f0aa5f534b98977b171857c2c9"
[[package]]
name = "cc"
version = "1.0.99"
@ -51,6 +72,7 @@ dependencies = [
"proc-macro2",
"quote",
"rand",
"ron",
"serde",
"syn",
"tokio",
@ -100,6 +122,17 @@ dependencies = [
"adler",
]
[[package]]
name = "mio"
version = "0.8.11"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "a4a650543ca06a924e8b371db273b2756685faae30f8487da1b56505a8f78b0c"
dependencies = [
"libc",
"wasi",
"windows-sys 0.48.0",
]
[[package]]
name = "num_cpus"
version = "1.16.0"
@ -179,6 +212,18 @@ dependencies = [
"getrandom",
]
[[package]]
name = "ron"
version = "0.8.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "b91f7eff05f748767f183df4320a63d6936e9c6107d97c9e6bdd9784f4289c94"
dependencies = [
"base64",
"bitflags",
"serde",
"serde_derive",
]
[[package]]
name = "rustc-demangle"
version = "0.1.24"
@ -205,6 +250,16 @@ dependencies = [
"syn",
]
[[package]]
name = "socket2"
version = "0.5.7"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "ce305eb0b4296696835b71df73eb912e0f1ffd2556a501fcede6e0c50349191c"
dependencies = [
"libc",
"windows-sys 0.52.0",
]
[[package]]
name = "syn"
version = "2.0.66"
@ -223,9 +278,14 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "ba4f4a02a7a80d6f274636f0aa95c7e383b912d41fe721a31f29e29698585a4a"
dependencies = [
"backtrace",
"bytes",
"libc",
"mio",
"num_cpus",
"pin-project-lite",
"socket2",
"tokio-macros",
"windows-sys 0.48.0",
]
[[package]]
@ -250,3 +310,142 @@ name = "wasi"
version = "0.11.0+wasi-snapshot-preview1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
[[package]]
name = "windows-sys"
version = "0.48.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "677d2418bec65e3338edb076e806bc1ec15693c5d0104683f2efe857f61056a9"
dependencies = [
"windows-targets 0.48.5",
]
[[package]]
name = "windows-sys"
version = "0.52.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "282be5f36a8ce781fad8c8ae18fa3f9beff57ec1b52cb3de0789201425d9a33d"
dependencies = [
"windows-targets 0.52.5",
]
[[package]]
name = "windows-targets"
version = "0.48.5"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "9a2fa6e2155d7247be68c096456083145c183cbbbc2764150dda45a87197940c"
dependencies = [
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"windows_aarch64_msvc 0.48.5",
"windows_i686_gnu 0.48.5",
"windows_i686_msvc 0.48.5",
"windows_x86_64_gnu 0.48.5",
"windows_x86_64_gnullvm 0.48.5",
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3
Cargo.toml
View File

@ -9,10 +9,11 @@ publish = ["gitea"]
proc-macro2 = "1.0.85"
quote = "1.0.36"
rand = "0.8.5"
ron = "0.8.1"
serde = { version = "1.0.203", features = ["serde_derive"] }
syn = "2.0.66"
# TODO: rt and macros should be removed unless we do tests
tokio = { version = "1.38.0", features = ["sync", "rt-multi-thread", "macros", "time"] }
tokio = { version = "1.38.0", features = ["sync", "rt-multi-thread", "macros", "time", "io-util", "net"] }
[lib]
proc-macro = true

2
flake.nix
View File

@ -19,7 +19,7 @@
doCheck = true;
};
devShell = with pkgs; mkShell {
nativeBuildInputs = with pkgs; [rustc cargo rustfmt pre-commit clippy];
nativeBuildInputs = with pkgs; [rustc cargo rustfmt pre-commit clippy cargo-expand];
};
});
}

59
src/lib.rs
View File

@ -42,7 +42,8 @@ fn derive_protocol(input: proc_macro2::TokenStream) -> proc_macro2::TokenStream
let question_enum_name = format_ident!("__{}Question", name);
let query_enum_name = format_ident!("__{}Query", name);
let queries_struct_name = format_ident!("__{}Queries", name);
let server_trait_name = format_ident!("{}Server", name);
let client_connection_struct_name = format_ident!("__{}Connection", name);
let server_trait_name = format_ident!("{}ServerTrait", name);
let client_struct_name = format_ident!("{}Client", name);
let vis = &input.vis;
@ -210,6 +211,59 @@ fn derive_protocol(input: proc_macro2::TokenStream) -> proc_macro2::TokenStream
}
}
};
// Create a struct to handle the connection from the client to the server
let stream_type = quote! { tokio::net::TcpStream }; // TODO: In the future we could support other stream types
let cc_struct = quote! {
struct #client_connection_struct_name {
to_send: tokio::sync::mpsc::Receiver<(u64, #question_enum_name)>,
received: tokio::sync::mpsc::Sender<(u64, #answer_enum_name)>,
stream: #stream_type,
}
impl #client_connection_struct_name {
pub fn new(
to_send: tokio::sync::mpsc::Receiver<(u64, #question_enum_name)>,
received: tokio::sync::mpsc::Sender<(u64, #answer_enum_name)>,
stream: #stream_type,
) -> Self {
Self {
to_send,
received,
stream,
}
}
pub async fn run(mut self) {
use tokio::io::AsyncWriteExt;
use tokio::io::AsyncReadExt;
let mut buf = Vec::with_capacity(1024);
loop {
tokio::select! {
Some((nonce, query)) = self.to_send.recv() => {
let serialized = ron::ser::to_string(&query).expect("Failed to serialize query!");
let len = serialized.len() as u32;
self.stream.write_all(&len.to_le_bytes()).await.expect("Failed to write length!");
self.stream.write_all(serialized.as_bytes()).await.expect("Failed to write query!");
},
Ok(_) = self.stream.readable() => {
match self.stream.try_read(&mut buf) {
Ok(0) => break, // Stream closed
Ok(n) => {
// TODO: This doesn't cope with partial reads, we will handle that later
let len = u32::from_le_bytes(buf[..4].try_into().expect("Failed to convert bytes to u32"));
let serialized = std::str::from_utf8(&buf[4..(4 + len as usize)]).expect("Failed to convert bytes to string");
let query: #answer_enum_name = ron::de::from_str(serialized).expect("Failed to deserialize query!");
self.received.send((0, query)).await.expect("Failed to send query!");
buf.clear();
},
Err(ref e) if e.kind() == ::std::io::ErrorKind::WouldBlock => { continue; },
Err(e) => eprintln!("Error reading from stream: {:?}", e),
}
}
}
}
}
}
};
// Create a struct which the client will use to communicate
let client_recv_queue_wrapper = format_ident!("__{}RecvQueueWrapper", name);
let client_struct = quote! {
@ -232,7 +286,7 @@ fn derive_protocol(input: proc_macro2::TokenStream) -> proc_macro2::TokenStream
queries: #queries_struct_name,
send_queue: tokio::sync::mpsc::Sender<(u64, #question_enum_name)>,
recv_queue: #client_recv_queue_wrapper,
} // TODO: This struct will have some fields to handle the actual connection
}
impl #client_struct_name {
pub fn new(send_queue: tokio::sync::mpsc::Sender<(u64, #question_enum_name)>, recv_queue: tokio::sync::mpsc::Receiver<(u64, #answer_enum_name)>) -> Self {
Self {
@ -279,6 +333,7 @@ fn derive_protocol(input: proc_macro2::TokenStream) -> proc_macro2::TokenStream
#query_enum
#queries_struct
#server_trait
#cc_struct
#client_struct
};
expanded