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use std::{net::SocketAddr, time::Duration};
use crate::{
language::{
data::{
io::Bytes,
native_value::{NativeData, NativeValue},
net::{
sockets::{Connection, DatagramSocket, tls_connect, tls_wrap},
tcp::Connection as TcpConnection,
},
value::{Executable, Value},
},
interpreter::{Interpreter, InterpreterResult},
native::NativeOutcome,
text::location::Location,
},
runtime::tasks::NativeFault,
};
fn native<T: NativeData>(value: &Value) -> Option<&T>
{
if let Value::Native(value) = value.underlying()
{
value.downcast()
}
else
{
None
}
}
fn data(value: impl NativeData) -> Value
{
Value::Native(NativeValue::new(value))
}
fn address(address: SocketAddr) -> Value
{
Value::from_array(vec![
Value::from_string(address.ip().to_string()),
Value::Integer(address.port() as i64),
])
}
fn text(value: &Value) -> Option<&str>
{
if let Value::String(value, Executable::No) = value.underlying()
{
Some(value)
}
else
{
None
}
}
fn port(value: Option<&Value>) -> Option<u16>
{
if let Some(Value::Integer(value)) = value
{
u16::try_from(*value).ok()
}
else
{
None
}
}
impl Interpreter
{
pub(in crate::language::interpreter) fn handle_socket(
&mut self,
_: &Location,
args: &[Value],
) -> NativeOutcome
{
let [command, input, rest @ ..] = args
else
{
return NativeOutcome::Ready(self.io_fault(
"OpenError",
"socket",
"Missing operation".into(),
));
};
let command = text(command).unwrap_or("");
match command
{
"udp_bind" =>
{
let (Some(host), Some(port)) = (text(input), port(rest.first()))
else
{
return NativeOutcome::Ready(self.io_fault(
"OpenError",
command,
"Expected host and port".into(),
));
};
let host = host.to_string();
self.native_wait(
command,
async move { DatagramSocket::bind(host, port).await },
data,
)
}
"udp_address" => NativeOutcome::Ready(
native::<DatagramSocket>(input)
.ok_or_else(|| NativeFault::new("OpenError", "Expected UDP socket"))
.and_then(DatagramSocket::address)
.map(address)
.unwrap_or_else(|error| self.io_fault(&error.kind, command, error.message)),
),
"udp_receive" =>
{
let Some(socket) = native::<DatagramSocket>(input).cloned()
else
{
return NativeOutcome::Ready(self.io_fault(
"ReadError",
command,
"Expected UDP socket".into(),
));
};
let maximum = if let Some(Value::Integer(maximum)) = rest.first()
{
*maximum
}
else
{
65535
};
if !(1..=65535).contains(&maximum)
{
return NativeOutcome::Ready(self.io_fault(
"LimitError",
command,
"Datagram limit must be 1..65535".into(),
));
}
self.native_wait(
command,
async move {
tokio::time::timeout(
Duration::from_secs(30),
socket.receive(maximum as usize),
)
.await
.map_err(|_| {
NativeFault::new("TimeoutError", "Datagram receive timed out")
})?
},
|(bytes, peer, truncated)| {
Value::from_array(vec![
data(bytes),
address(peer),
Value::Boolean(truncated),
])
},
)
}
"udp_send" =>
{
let socket = native::<DatagramSocket>(input).cloned();
let bytes = rest.first().and_then(native::<Bytes>).cloned();
let host = rest.get(1).and_then(text).map(str::to_string);
let port = port(rest.get(2));
let (Some(socket), Some(bytes), Some(host), Some(port)) =
(socket, bytes, host, port)
else
{
return NativeOutcome::Ready(self.io_fault(
"WriteError",
command,
"Expected socket, Bytes, host and port".into(),
));
};
self.native_wait(
command,
async move {
tokio::time::timeout(
Duration::from_secs(30),
socket.send(bytes, host, port),
)
.await
.map_err(|_| NativeFault::new("TimeoutError", "Datagram send timed out"))?
},
|count| Value::Integer(count as i64),
)
}
"reader" | "writer" => NativeOutcome::Ready(
native::<Connection>(input)
.map(|connection| {
if command == "reader"
{
data(connection.reader.clone())
}
else
{
data(connection.writer.clone())
}
})
.unwrap_or_else(|| {
self.io_fault("OpenError", command, "Expected stream connection".into())
}),
),
"tls_connect" | "tls_wrap" =>
{
let certificate = rest.get(1).and_then(native::<Bytes>).cloned();
if command == "tls_connect"
{
let (Some(host), Some(port)) = (text(input), port(rest.first()))
else
{
return NativeOutcome::Ready(self.io_fault(
"OpenError",
command,
"Expected TLS host and port".into(),
));
};
let host = host.to_string();
self.native_wait(
command,
async move {
tokio::time::timeout(
Duration::from_secs(30),
tls_connect(host, port, certificate),
)
.await
.map_err(|_| {
NativeFault::new("TimeoutError", "TLS connect timed out")
})?
},
data,
)
}
else
{
let connection = native::<TcpConnection>(input).cloned();
let host = rest.first().and_then(text).map(str::to_string);
let (Some(connection), Some(host)) = (connection, host)
else
{
return NativeOutcome::Ready(self.io_fault(
"OpenError",
command,
"Expected TCP connection and TLS server name".into(),
));
};
self.native_wait(
command,
async move {
tokio::time::timeout(
Duration::from_secs(30),
tls_wrap(connection, host, certificate),
)
.await
.map_err(|_| {
NativeFault::new("TimeoutError", "TLS handshake timed out")
})?
},
data,
)
}
}
#[cfg(unix)]
"unix_connect" | "unix_listen" =>
{
let Some(path) = text(input).map(str::to_string)
else
{
return NativeOutcome::Ready(self.io_fault(
"OpenError",
command,
"Expected Unix socket path".into(),
));
};
if command == "unix_connect"
{
self.native_wait(
command,
async move {
tokio::net::UnixStream::connect(path)
.await
.map(Connection::new)
.map_err(|error| NativeFault::io("OpenError", error))
},
data,
)
}
else
{
self.native_wait(command, async move
{ crate::language::data::net::sockets::unix::Listener::bind(path) }, data)
}
}
#[cfg(unix)]
"unix_accept" =>
{
let Some(listener) =
native::<crate::language::data::net::sockets::unix::Listener>(input).cloned()
else
{
return NativeOutcome::Ready(self.io_fault(
"OpenError",
command,
"Expected Unix listener".into(),
));
};
self.native_wait(command, async move { listener.accept().await }, data)
}
_ => NativeOutcome::Ready(self.io_fault(
"OpenError",
command,
"Unsupported socket operation".into(),
)),
}
}
pub(in crate::language::interpreter) fn handle_socket_close(
&mut self,
location: &Location,
args: &[Value],
) -> InterpreterResult<()>
{
let mut value = Value::None;
if let [input] = args
{
if let Some(socket) = native::<DatagramSocket>(input)
{
socket.close();
}
else if let Some(connection) = native::<Connection>(input)
{
connection.close();
}
else
{
#[cfg(unix)]
if let Some(listener) =
native::<crate::language::data::net::sockets::unix::Listener>(input)
{
listener.close();
self.last_result = Some(value);
return Ok(());
}
value = self.io_fault(
"ClosedError",
"socket.close",
"Expected socket handle".into(),
);
}
}
self.activate_failure(location, &mut value, false)?;
self.last_result = Some(value);
Ok(())
}
}