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Implement lb_tcpstream

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This commit is contained in:
lumi 2025-06-28 15:42:16 +10:00
parent a2cbb24a75
commit 124e9bedfe
Signed by: luaneko
GPG Key ID: 406809B8763FF07A
3 changed files with 262 additions and 75 deletions
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2
crates/lb/Cargo.toml
View File

@ -11,7 +11,7 @@ repository.workspace = true
runtime = ["tokio/rt"]
task = ["tokio/rt", "tokio/time"]
fs = ["tokio/fs", "dep:walkdir", "dep:globset", "dep:tempfile"]
net = ["tokio/net"]
net = ["tokio/net", "tokio/io-util"]
[dependencies]
derive_more = { version = "2.0.1", features = ["full"] }

314
crates/lb/src/net.rs
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@ -9,11 +9,15 @@
use derive_more::{From, FromStr};
use luaffi::{cdef, marker::OneOf, metatype};
use std::{
cell::{Ref, RefCell, RefMut},
net::{AddrParseError, IpAddr, Ipv4Addr, Ipv6Addr, SocketAddr},
time::Duration,
};
use thiserror::Error;
use tokio::net::{TcpListener, TcpSocket, TcpStream};
use tokio::{
io::{AsyncReadExt, AsyncWriteExt, Interest},
net::{TcpListener, TcpSocket, TcpStream},
};
/// Errors that can be thrown by this library.
///
@ -174,20 +178,24 @@ impl lb_netlib {
/// Creates a new TCP socket configured for IPv4.
///
/// This calls `socket(2)` with `AF_INET` and `SOCK_STREAM`.
///
/// # Errors
///
/// This function may throw an error if the socket could not be created.
pub extern "Lua-C" fn tcp() -> Result<lb_tcpsocket> {
Ok(Some(TcpSocket::new_v4()?).into())
Ok(lb_tcpsocket::new(TcpSocket::new_v4()?))
}
/// Creates a new TCP socket configured for IPv6.
///
/// This calls `socket(2)` with `AF_INET6` and `SOCK_STREAM`.
///
/// # Errors
///
/// This function may throw an error if the socket could not be created.
pub extern "Lua-C" fn tcp_v6() -> Result<lb_tcpsocket> {
Ok(Some(TcpSocket::new_v6()?).into())
Ok(lb_tcpsocket::new(TcpSocket::new_v6()?))
}
/// Creates a new TCP socket bound to the given address and port.
@ -490,44 +498,35 @@ impl lb_socketaddr {
self.0.ip().into()
}
/// Sets the IP part of this address.
///
/// This function accepts the same arguments as [`ipaddr`](lb_netlib::ipaddr).
pub extern "Lua" fn set_ip(
&mut self,
addr: OneOf<(&str, &lb_ipaddr, &lb_socketaddr)>,
) -> &mut Self {
if __istype(__ct.lb_ipaddr, addr) {
self.__set_ip(addr);
} else if __istype(__ct.lb_socketaddr, addr) {
self.__set_ip(addr.ip());
} else {
self.__set_ip_parse(addr);
}
self
}
extern "Lua-C" fn __set_ip(&mut self, ip: &lb_ipaddr) {
self.0.set_ip(ip.0);
}
extern "Lua-C" fn __set_ip_parse(&mut self, addr: &str) -> Result<()> {
Ok(self.0.set_ip(addr.parse()?))
}
/// Returns the port part of this address.
pub extern "Lua-C" fn port(&self) -> u16 {
self.0.port()
}
/// Sets the port part of this address.
pub extern "Lua" fn set_port(&mut self, port: u16) -> &mut Self {
self.__set_port(port);
self
pub extern "Lua-C" fn with_ip(&self, ip: &lb_ipaddr) -> Self {
SocketAddr::new(ip.0, self.port()).into()
}
extern "Lua-C" fn __set_port(&mut self, port: u16) {
self.0.set_port(port)
pub extern "Lua-C" fn with_port(&self, port: u16) -> Self {
SocketAddr::new(self.ip().0, port).into()
}
/// Returns `true` if the given addresses are equal.
#[eq]
pub extern "Lua-C" fn equals(left: &Self, right: &Self) -> bool {
left.0 == right.0
}
/// Returns `true` if the left address is less than the right address.
#[lt]
pub extern "Lua-C" fn less_than(left: &Self, right: &Self) -> bool {
left.0 < right.0
}
/// Returns `true` if the left address is less than or equal to the right address.
#[le]
pub extern "Lua-C" fn less_than_or_equals(left: &Self, right: &Self) -> bool {
left.0 <= right.0
}
/// Returns the string representation of this address.
@ -538,67 +537,85 @@ impl lb_socketaddr {
}
/// TCP socket which has not yet been converted to an [`lb_tcpstream`] or [`lb_tcplistener`].
#[derive(Debug, From)]
#[derive(Debug)]
#[cdef]
pub struct lb_tcpsocket(#[opaque] Option<TcpSocket>);
pub struct lb_tcpsocket(#[opaque] RefCell<Option<TcpSocket>>);
#[metatype]
impl lb_tcpsocket {
fn socket(&self) -> Result<&TcpSocket> {
self.0.as_ref().ok_or(Error::SocketConsumed)
fn new(socket: TcpSocket) -> Self {
Self(RefCell::new(Some(socket)))
}
/// See [`TcpSocket::keepalive`].
fn socket(&self) -> Result<Ref<TcpSocket>> {
let socket = self.0.borrow();
match *socket {
Some(_) => Ok(Ref::map(socket, |s| s.as_ref().unwrap())),
None => Err(Error::SocketConsumed),
}
}
/// Gets the value of the `SO_KEEPALIVE` option on this socket.
pub extern "Lua-C" fn keepalive(&self) -> Result<bool> {
Ok(self.socket()?.keepalive()?)
}
/// See [`TcpSocket::set_keepalive`].
/// Sets value for the `SO_KEEPALIVE` option on this socket.
///
/// This enables or disables periodic keepalive messages on the connection.
pub extern "Lua-C" fn set_keepalive(&self, enabled: bool) -> Result<()> {
Ok(self.socket()?.set_keepalive(enabled)?)
}
/// See [`TcpSocket::reuseaddr`].
/// Gets the value of the `SO_REUSEADDR` option on this socket.
pub extern "Lua-C" fn reuseaddr(&self) -> Result<bool> {
Ok(self.socket()?.reuseaddr()?)
}
/// See [`TcpSocket::set_reuseaddr`].
/// Sets value for the `SO_REUSEADDR` option on this socket.
///
/// This allows the socket to bind to an address that is already in use.
pub extern "Lua-C" fn set_reuseaddr(&self, enabled: bool) -> Result<()> {
Ok(self.socket()?.set_reuseaddr(enabled)?)
}
/// See [`TcpSocket::reuseport`].
/// Gets the value of the `SO_REUSEPORT` option on this socket.
pub extern "Lua-C" fn reuseport(&self) -> Result<bool> {
Ok(self.socket()?.reuseport()?)
}
/// See [`TcpSocket::set_reuseport`].
/// Sets value for the `SO_REUSEPORT` option on this socket.
///
/// This allows multiple sockets to bind to the same port.
pub extern "Lua-C" fn set_reuseport(&self, enabled: bool) -> Result<()> {
Ok(self.socket()?.set_reuseport(enabled)?)
}
/// See [`TcpSocket::send_buffer_size`].
/// Gets the value of the `SO_SNDBUF` option on this socket.
pub extern "Lua-C" fn sendbuf(&self) -> Result<u32> {
Ok(self.socket()?.send_buffer_size()?)
}
/// See [`TcpSocket::set_send_buffer_size`].
/// Sets value for the `SO_SNDBUF` option on this socket.
///
/// This sets the size of the send buffer in bytes.
pub extern "Lua-C" fn set_sendbuf(&self, size: u32) -> Result<()> {
Ok(self.socket()?.set_send_buffer_size(size)?)
}
/// See [`TcpSocket::recv_buffer_size`].
/// Gets the value of the `SO_RCVBUF` option on this socket.
pub extern "Lua-C" fn recvbuf(&self) -> Result<u32> {
Ok(self.socket()?.recv_buffer_size()?)
}
/// See [`TcpSocket::set_recv_buffer_size`].
/// Sets value for the `SO_RCVBUF` option on this socket.
///
/// This sets the size of the receive buffer in bytes.
pub extern "Lua-C" fn set_recvbuf(&self, size: u32) -> Result<()> {
Ok(self.socket()?.set_recv_buffer_size(size)?)
}
/// See [`TcpSocket::linger`].
/// Gets the value of the `SO_LINGER` option on this socket, in seconds.
pub extern "Lua-C" fn linger(&self) -> Result<f64> {
Ok(self
.socket()?
@ -607,63 +624,212 @@ impl lb_tcpsocket {
.unwrap_or(0.))
}
/// See [`TcpSocket::set_linger`].
/// Sets the value of the `SO_LINGER` option on this socket.
///
/// This controls how long the socket will remain open after close if unsent data is present.
pub extern "Lua-C" fn set_linger(&self, secs: f64) -> Result<()> {
Ok(self
.socket()?
.set_linger((secs != 0.).then_some(Duration::from_secs_f64(secs)))?)
}
/// See [`TcpSocket::nodelay`].
/// Gets the value of the `TCP_NODELAY` option on this socket.
pub extern "Lua-C" fn nodelay(&self) -> Result<bool> {
Ok(self.socket()?.nodelay()?)
}
/// See [`TcpSocket::set_nodelay`].
/// Sets the value of the `TCP_NODELAY` option on this socket.
///
/// This enables or disables Nagle's algorithm which delays sending small packets.
pub extern "Lua-C" fn set_nodelay(&self, enabled: bool) -> Result<()> {
Ok(self.socket()?.set_nodelay(enabled)?)
}
/// See [`TcpSocket::tos`].
pub extern "Lua-C" fn tos(&self) -> Result<u32> {
Ok(self.socket()?.tos()?)
}
/// See [`TcpSocket::set_tos`].
pub extern "Lua-C" fn set_tos(&self, tos: u32) -> Result<()> {
Ok(self.socket()?.set_tos(tos)?)
}
/// See [`TcpSocket::local_addr`].
/// Gets the local address that this socket is bound to.
pub extern "Lua-C" fn local_addr(&self) -> Result<lb_socketaddr> {
Ok(self.socket()?.local_addr()?.into())
}
/// See [`TcpSocket::bind`].
/// Binds this socket to the given local address.
pub extern "Lua-C" fn bind(&self, addr: &lb_socketaddr) -> Result<()> {
Ok(self.socket()?.bind(addr.0)?)
}
/// See [`TcpSocket::listen`].
pub extern "Lua-C" fn listen(&mut self, backlog: u32) -> Result<lb_tcplistener> {
let socket = self.0.take().ok_or(Error::SocketConsumed)?;
/// Transitions this socket to the listening state.
///
/// This consumes the socket and returns a new [`lb_tcplistener`] that can accept incoming
/// connections. This socket object can no longer be used after this call.
pub extern "Lua-C" fn listen(&self, backlog: u32) -> Result<lb_tcplistener> {
let socket = self.0.borrow_mut().take().ok_or(Error::SocketConsumed)?;
Ok(socket.listen(backlog)?.into())
}
/// See [`TcpSocket::connect`].
pub async extern "Lua-C" fn connect(&mut self, addr: &lb_socketaddr) -> Result<lb_tcpstream> {
let socket = self.0.take().ok_or(Error::SocketConsumed)?;
Ok(socket.connect(addr.0).await?.into())
/// Connects this socket to the given remote address, transitioning it to an established state.
///
/// This consumes the socket and returns a new [`lb_tcpstream`] that can be used to send and
/// receive data. This socket object can no longer be used after this call.
///
/// # Errors
///
/// This function may throw an error if connection could not be established to the given remote
/// address.
pub async extern "Lua-C" fn connect(&self, addr: &lb_socketaddr) -> Result<lb_tcpstream> {
let socket = self.0.borrow_mut().take().ok_or(Error::SocketConsumed)?;
Ok(lb_tcpstream::new(socket.connect(addr.0).await?))
}
}
/// TCP connection between a local and a remote socket.
#[derive(Debug, From)]
#[derive(Debug)]
#[cdef]
pub struct lb_tcpstream(#[opaque] TcpStream);
pub struct lb_tcpstream(#[opaque] RefCell<TcpStream>);
#[metatype]
impl lb_tcpstream {}
impl lb_tcpstream {
fn new(stream: TcpStream) -> Self {
Self(RefCell::new(stream))
}
fn stream(&self) -> Ref<TcpStream> {
self.0.borrow()
}
fn stream_mut(&self) -> RefMut<TcpStream> {
self.0.borrow_mut()
}
/// Gets the remote address of this stream.
pub extern "Lua-C" fn peer_addr(&self) -> Result<lb_socketaddr> {
Ok(self.stream().peer_addr()?.into())
}
/// Gets the local address of this stream.
pub extern "Lua-C" fn local_addr(&self) -> Result<lb_socketaddr> {
Ok(self.stream().local_addr()?.into())
}
/// Gets the value of the `SO_LINGER` option on this stream, in seconds.
pub extern "Lua-C" fn linger(&self) -> Result<f64> {
Ok(self
.stream()
.linger()?
.map(|n| n.as_secs_f64())
.unwrap_or(0.))
}
/// Sets the value of the `SO_LINGER` option on this stream.
pub extern "Lua-C" fn set_linger(&self, secs: f64) -> Result<()> {
Ok(self
.stream()
.set_linger((secs != 0.).then_some(Duration::from_secs_f64(secs)))?)
}
/// Gets the value of the `TCP_NODELAY` option on this stream.
pub extern "Lua-C" fn nodelay(&self) -> Result<bool> {
Ok(self.stream().nodelay()?)
}
/// Sets the value of the `TCP_NODELAY` option on this stream.
///
/// This enables or disables Nagle's algorithm which delays sending small packets.
pub extern "Lua-C" fn set_nodelay(&self, enabled: bool) -> Result<()> {
Ok(self.stream().set_nodelay(enabled)?)
}
/// Gets the value of the `IP_TTL` option on this stream.
pub extern "Lua-C" fn ttl(&self) -> Result<u32> {
Ok(self.stream().ttl()?)
}
/// Sets the value of the `IP_TTL` option on this stream.
pub extern "Lua-C" fn set_ttl(&self, ttl: u32) -> Result<()> {
Ok(self.stream().set_ttl(ttl)?)
}
/// Waits for the stream to be ready for the given half (`"read"`, `"write"`, or `nil` for both halves).
pub async extern "Lua-C" fn ready(&self, half: Option<&str>) -> Result<()> {
let ty = match half {
None => Interest::READABLE | Interest::WRITABLE,
Some("read") => Interest::READABLE,
Some("write") => Interest::WRITABLE,
_ => Err(std::io::Error::new(
std::io::ErrorKind::InvalidInput,
"invalid ready interest",
))?,
};
self.stream().ready(ty).await?;
Ok(())
}
/// Reads exactly `len` bytes from the stream. Returns None on EOF.
pub async extern "Lua-C" fn read(&self, len: u32) -> Result<Option<Vec<u8>>> {
let mut buf = vec![0; len as usize];
match self.stream_mut().read_exact(&mut buf).await {
Ok(_) => Ok(Some(buf)),
Err(err) if err.kind() == std::io::ErrorKind::UnexpectedEof => Ok(None),
Err(err) => Err(err.into()),
}
}
/// Writes the given bytes to the stream.
pub async extern "Lua-C" fn write(&self, buf: &[u8]) -> Result<()> {
Ok(self.stream_mut().write_all(buf).await?)
}
/// Reads up to `len` bytes from the stream. Returns None on EOF.
pub async extern "Lua-C" fn read_partial(&self, len: u32) -> Result<Option<Vec<u8>>> {
let mut buf = vec![0; len as usize];
let n = self.stream_mut().read(&mut buf).await?;
if n == 0 {
Ok(None)
} else {
buf.truncate(n);
Ok(Some(buf))
}
}
/// Writes the given bytes to the stream and returns the number of bytes successfully written.
pub async extern "Lua-C" fn write_partial(&self, buf: &[u8]) -> Result<u32> {
Ok(self.stream_mut().write(buf).await? as u32)
}
/// Attempts to read up to `len` bytes from the stream without waiting. Returns None on EOF.
pub extern "Lua-C" fn try_read(&self, len: u32) -> Result<Option<Vec<u8>>> {
let mut buf = vec![0u8; len as usize];
match self.stream_mut().try_read(&mut buf) {
Ok(0) => Ok(None),
Ok(n) => {
buf.truncate(n);
Ok(Some(buf))
}
Err(err) if err.kind() == std::io::ErrorKind::WouldBlock => Ok(None),
Err(err) => Err(err.into()),
}
}
/// Peeks up to `len` bytes at incoming data without consuming it. Returns None on EOF.
pub async extern "Lua-C" fn peek(&self, len: u32) -> Result<Option<Vec<u8>>> {
let mut buf = vec![0u8; len as usize];
let n = self.stream_mut().peek(&mut buf).await?;
if n == 0 {
Ok(None)
} else {
buf.truncate(n);
Ok(Some(buf))
}
}
/// Shuts down this connection.
pub async extern "Lua-C" fn shutdown(&self) -> Result<()> {
Ok(self.stream_mut().shutdown().await?)
}
#[call]
pub async extern "Lua" fn __call(&self, len: u32) -> Result<Option<Vec<u8>>> {
self.read_partial(len)
}
}
/// TCP socket server, listening for connections.
#[derive(Debug, From)]

21
crates/lb/tests/net.lua
View File

@ -1,6 +1,27 @@
local ok, net = pcall(require, "lb:net")
if not ok then return end
describe("ipaddr", function()
test("invalid ipaddr throws", function()
assert(not pcall(net.ipaddr, "invalid ip"))
end)
test("comparison", function()
local a = net.ipaddr("10.0.0.1")
local b = net.ipaddr("10.0.0.1")
local c = net.ipaddr("10.0.0.2")
assert(a ~= nil and a ~= {} and a ~= "10.0.0.1" and a ~= 167772161)
assert(a == a and a == b and a ~= c and b ~= c and c == c and c ~= a)
assert(a <= b and a < c and a <= c and b < c and b <= c and a <= a and c <= c)
assert(not (a < b or a > b or a > c or b > c or a >= c or b >= c))
end)
test("tostring", function()
local ip = net.ipaddr("10.0.0.1")
assert(tostring(ip) == "10.0.0.1")
end)
end)
describe("tcp", function()
describe("socket", function()
test("bind", function()