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// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.
use crate::io::UnixStreamResource;use crate::NetPermissions;use deno_core::error::bad_resource;use deno_core::error::custom_error;use deno_core::error::AnyError;use deno_core::op;use deno_core::AsyncRefCell;use deno_core::CancelHandle;use deno_core::CancelTryFuture;use deno_core::OpState;use deno_core::RcRef;use deno_core::Resource;use deno_core::ResourceId;use deno_core::ZeroCopyBuf;use serde::Deserialize;use serde::Serialize;use std::borrow::Cow;use std::cell::RefCell;use std::path::Path;use std::rc::Rc;use tokio::net::UnixDatagram;use tokio::net::UnixListener;pub use tokio::net::UnixStream;
/// A utility function to map OsStrings to Stringspub fn into_string(s: std::ffi::OsString) -> Result<String, AnyError> {  s.into_string().map_err(|s| {    let message = format!("File name or path {:?} is not valid UTF-8", s);    custom_error("InvalidData", message)  })}
struct UnixListenerResource {  listener: AsyncRefCell<UnixListener>,  cancel: CancelHandle,}
impl Resource for UnixListenerResource {  fn name(&self) -> Cow<str> {    "unixListener".into()  }
  fn close(self: Rc<Self>) {    self.cancel.cancel();  }}
pub struct UnixDatagramResource {  pub socket: AsyncRefCell<UnixDatagram>,  pub cancel: CancelHandle,}
impl Resource for UnixDatagramResource {  fn name(&self) -> Cow<str> {    "unixDatagram".into()  }
  fn close(self: Rc<Self>) {    self.cancel.cancel();  }}
#[derive(Serialize)]pub struct UnixAddr {  pub path: Option<String>,}
#[derive(Deserialize)]pub struct UnixListenArgs {  pub path: String,}
#[op]pub async fn op_net_accept_unix(  state: Rc<RefCell<OpState>>,  rid: ResourceId,) -> Result<(ResourceId, Option<String>, Option<String>), AnyError> {  let resource = state    .borrow()    .resource_table    .get::<UnixListenerResource>(rid)    .map_err(|_| bad_resource("Listener has been closed"))?;  let listener = RcRef::map(&resource, |r| &r.listener)    .try_borrow_mut()    .ok_or_else(|| custom_error("Busy", "Listener already in use"))?;  let cancel = RcRef::map(resource, |r| &r.cancel);  let (unix_stream, _socket_addr) = listener    .accept()    .try_or_cancel(cancel)    .await    .map_err(crate::ops::accept_err)?;
  let local_addr = unix_stream.local_addr()?;  let remote_addr = unix_stream.peer_addr()?;  let local_addr_path = local_addr.as_pathname().map(pathstring).transpose()?;  let remote_addr_path =    remote_addr.as_pathname().map(pathstring).transpose()?;  let resource = UnixStreamResource::new(unix_stream.into_split());  let mut state = state.borrow_mut();  let rid = state.resource_table.add(resource);  Ok((rid, local_addr_path, remote_addr_path))}
#[op]pub async fn op_net_connect_unix<NP>(  state: Rc<RefCell<OpState>>,  path: String,) -> Result<(ResourceId, Option<String>, Option<String>), AnyError>where  NP: NetPermissions + 'static,{  let address_path = Path::new(&path);  super::check_unstable2(&state, "Deno.connect");  {    let mut state_ = state.borrow_mut();    state_      .borrow_mut::<NP>()      .check_read(address_path, "Deno.connect()")?;    state_      .borrow_mut::<NP>()      .check_write(address_path, "Deno.connect()")?;  }  let unix_stream = UnixStream::connect(Path::new(&path)).await?;  let local_addr = unix_stream.local_addr()?;  let remote_addr = unix_stream.peer_addr()?;  let local_addr_path = local_addr.as_pathname().map(pathstring).transpose()?;  let remote_addr_path =    remote_addr.as_pathname().map(pathstring).transpose()?;  let mut state_ = state.borrow_mut();  let resource = UnixStreamResource::new(unix_stream.into_split());  let rid = state_.resource_table.add(resource);  Ok((rid, local_addr_path, remote_addr_path))}
#[op]pub async fn op_net_recv_unixpacket(  state: Rc<RefCell<OpState>>,  rid: ResourceId,  mut buf: ZeroCopyBuf,) -> Result<(usize, Option<String>), AnyError> {  let resource = state    .borrow()    .resource_table    .get::<UnixDatagramResource>(rid)    .map_err(|_| bad_resource("Socket has been closed"))?;  let socket = RcRef::map(&resource, |r| &r.socket)    .try_borrow_mut()    .ok_or_else(|| custom_error("Busy", "Socket already in use"))?;  let cancel = RcRef::map(resource, |r| &r.cancel);  let (nread, remote_addr) =    socket.recv_from(&mut buf).try_or_cancel(cancel).await?;  let path = remote_addr.as_pathname().map(pathstring).transpose()?;  Ok((nread, path))}
#[op]async fn op_net_send_unixpacket<NP>(  state: Rc<RefCell<OpState>>,  rid: ResourceId,  path: String,  zero_copy: ZeroCopyBuf,) -> Result<usize, AnyError>where  NP: NetPermissions + 'static,{  let address_path = Path::new(&path);  {    let mut s = state.borrow_mut();    s.borrow_mut::<NP>()      .check_write(address_path, "Deno.DatagramConn.send()")?;  }
  let resource = state    .borrow()    .resource_table    .get::<UnixDatagramResource>(rid)    .map_err(|_| custom_error("NotConnected", "Socket has been closed"))?;  let socket = RcRef::map(&resource, |r| &r.socket)    .try_borrow_mut()    .ok_or_else(|| custom_error("Busy", "Socket already in use"))?;  let nwritten = socket.send_to(&zero_copy, address_path).await?;
  Ok(nwritten)}
#[op]pub fn op_net_listen_unix<NP>(  state: &mut OpState,  path: String,) -> Result<(ResourceId, Option<String>), AnyError>where  NP: NetPermissions + 'static,{  let address_path = Path::new(&path);  super::check_unstable(state, "Deno.listen");  let permissions = state.borrow_mut::<NP>();  permissions.check_read(address_path, "Deno.listen()")?;  permissions.check_write(address_path, "Deno.listen()")?;  let listener = UnixListener::bind(address_path)?;  let local_addr = listener.local_addr()?;  let pathname = local_addr.as_pathname().map(pathstring).transpose()?;  let listener_resource = UnixListenerResource {    listener: AsyncRefCell::new(listener),    cancel: Default::default(),  };  let rid = state.resource_table.add(listener_resource);  Ok((rid, pathname))}
pub fn net_listen_unixpacket<NP>(  state: &mut OpState,  path: String,) -> Result<(ResourceId, Option<String>), AnyError>where  NP: NetPermissions + 'static,{  let address_path = Path::new(&path);  let permissions = state.borrow_mut::<NP>();  permissions.check_read(address_path, "Deno.listenDatagram()")?;  permissions.check_write(address_path, "Deno.listenDatagram()")?;  let socket = UnixDatagram::bind(address_path)?;  let local_addr = socket.local_addr()?;  let pathname = local_addr.as_pathname().map(pathstring).transpose()?;  let datagram_resource = UnixDatagramResource {    socket: AsyncRefCell::new(socket),    cancel: Default::default(),  };  let rid = state.resource_table.add(datagram_resource);  Ok((rid, pathname))}
#[op]pub fn op_net_listen_unixpacket<NP>(  state: &mut OpState,  path: String,) -> Result<(ResourceId, Option<String>), AnyError>where  NP: NetPermissions + 'static,{  super::check_unstable(state, "Deno.listenDatagram");  net_listen_unixpacket::<NP>(state, path)}
#[op]pub fn op_node_unstable_net_listen_unixpacket<NP>(  state: &mut OpState,  path: String,) -> Result<(ResourceId, Option<String>), AnyError>where  NP: NetPermissions + 'static,{  net_listen_unixpacket::<NP>(state, path)}
pub fn pathstring(pathname: &Path) -> Result<String, AnyError> {  into_string(pathname.into())}