7b4a6e3ace
And expose connect_to_host from happy_eyeballs to let clients explicitly choose to use SRV or not. (Rename connect to connect_with_srv)
329 lines
11 KiB
Rust
329 lines
11 KiB
Rust
use futures::{sink::SinkExt, task::Poll, Future, Sink, Stream};
|
|
use sasl::common::{ChannelBinding, Credentials};
|
|
use std::mem::replace;
|
|
use std::pin::Pin;
|
|
use std::str::FromStr;
|
|
use std::task::Context;
|
|
use tokio::net::TcpStream;
|
|
use tokio::task::JoinHandle;
|
|
use tokio::task::LocalSet;
|
|
use tokio_tls::TlsStream;
|
|
use xmpp_parsers::{ns, Element, Jid, JidParseError};
|
|
|
|
use super::auth::auth;
|
|
use super::bind::bind;
|
|
use crate::event::Event;
|
|
use crate::happy_eyeballs::{connect_to_host, connect_with_srv};
|
|
use crate::starttls::starttls;
|
|
use crate::xmpp_codec::Packet;
|
|
use crate::xmpp_stream;
|
|
use crate::{Error, ProtocolError};
|
|
|
|
/// XMPP client connection and state
|
|
///
|
|
/// It is able to reconnect. TODO: implement session management.
|
|
///
|
|
/// This implements the `futures` crate's [`Stream`](#impl-Stream) and
|
|
/// [`Sink`](#impl-Sink<Packet>) traits.
|
|
pub struct Client {
|
|
config: Config,
|
|
state: ClientState,
|
|
reconnect: bool,
|
|
// TODO: tls_required=true
|
|
}
|
|
|
|
/// XMPP server connection configuration
|
|
#[derive(Clone)]
|
|
pub enum ServerConfig {
|
|
UseSrv,
|
|
#[allow(unused)]
|
|
Manual {
|
|
host: String,
|
|
port: u16,
|
|
},
|
|
}
|
|
|
|
/// XMMPP client configuration
|
|
pub struct Config {
|
|
jid: Jid,
|
|
password: String,
|
|
server: ServerConfig,
|
|
}
|
|
|
|
type XMPPStream = xmpp_stream::XMPPStream<TlsStream<TcpStream>>;
|
|
|
|
enum ClientState {
|
|
Invalid,
|
|
Disconnected,
|
|
Connecting(JoinHandle<Result<XMPPStream, Error>>, LocalSet),
|
|
Connected(XMPPStream),
|
|
}
|
|
|
|
impl Client {
|
|
/// Start a new XMPP client
|
|
///
|
|
/// Start polling the returned instance so that it will connect
|
|
/// and yield events.
|
|
pub fn new<P: Into<String>>(jid: &str, password: P) -> Result<Self, JidParseError> {
|
|
let jid = Jid::from_str(jid)?;
|
|
let config = Config {
|
|
jid: jid.clone(),
|
|
password: password.into(),
|
|
server: ServerConfig::UseSrv,
|
|
};
|
|
let client = Self::new_with_config(config);
|
|
Ok(client)
|
|
}
|
|
|
|
/// Start a new client given that the JID is already parsed.
|
|
pub fn new_with_config(config: Config) -> Self {
|
|
let local = LocalSet::new();
|
|
let connect = local.spawn_local(Self::connect(
|
|
config.server.clone(),
|
|
config.jid.clone(),
|
|
config.password.clone(),
|
|
));
|
|
let client = Client {
|
|
config,
|
|
state: ClientState::Connecting(connect, local),
|
|
reconnect: false,
|
|
};
|
|
client
|
|
}
|
|
|
|
/// Set whether to reconnect (`true`) or let the stream end
|
|
/// (`false`) when a connection to the server has ended.
|
|
pub fn set_reconnect(&mut self, reconnect: bool) -> &mut Self {
|
|
self.reconnect = reconnect;
|
|
self
|
|
}
|
|
|
|
async fn connect(
|
|
server: ServerConfig,
|
|
jid: Jid,
|
|
password: String,
|
|
) -> Result<XMPPStream, Error> {
|
|
let username = jid.clone().node().unwrap();
|
|
let password = password;
|
|
|
|
// TCP connection
|
|
let tcp_stream = match server {
|
|
ServerConfig::UseSrv => {
|
|
connect_with_srv(&jid.clone().domain(), Some("_xmpp-client._tcp"), 5222).await?
|
|
}
|
|
ServerConfig::Manual { host, port } => connect_to_host(host.as_str(), port).await?,
|
|
};
|
|
|
|
// Unencryped XMPPStream
|
|
let xmpp_stream =
|
|
xmpp_stream::XMPPStream::start(tcp_stream, jid.clone(), ns::JABBER_CLIENT.to_owned())
|
|
.await?;
|
|
|
|
let xmpp_stream = if xmpp_stream.stream_features.can_starttls() {
|
|
// TlsStream
|
|
let tls_stream = starttls(xmpp_stream).await?;
|
|
// Encrypted XMPPStream
|
|
xmpp_stream::XMPPStream::start(tls_stream, jid.clone(), ns::JABBER_CLIENT.to_owned())
|
|
.await?
|
|
} else {
|
|
return Err(Error::Protocol(ProtocolError::NoTls));
|
|
};
|
|
|
|
let creds = Credentials::default()
|
|
.with_username(username)
|
|
.with_password(password)
|
|
.with_channel_binding(ChannelBinding::None);
|
|
// Authenticated (unspecified) stream
|
|
let stream = auth(xmpp_stream, creds).await?;
|
|
// Authenticated XMPPStream
|
|
let xmpp_stream =
|
|
xmpp_stream::XMPPStream::start(stream, jid, ns::JABBER_CLIENT.to_owned()).await?;
|
|
|
|
// XMPPStream bound to user session
|
|
let xmpp_stream = bind(xmpp_stream).await?;
|
|
Ok(xmpp_stream)
|
|
}
|
|
|
|
/// Get the client's bound JID (the one reported by the XMPP
|
|
/// server).
|
|
pub fn bound_jid(&self) -> Option<&Jid> {
|
|
match self.state {
|
|
ClientState::Connected(ref stream) => Some(&stream.jid),
|
|
_ => None,
|
|
}
|
|
}
|
|
|
|
/// Send stanza
|
|
pub async fn send_stanza(&mut self, stanza: Element) -> Result<(), Error> {
|
|
self.send(Packet::Stanza(stanza)).await
|
|
}
|
|
|
|
/// End connection by sending `</stream:stream>`
|
|
///
|
|
/// You may expect the server to respond with the same. This
|
|
/// client will then drop its connection.
|
|
///
|
|
/// Make sure to disable reconnect.
|
|
pub async fn send_end(&mut self) -> Result<(), Error> {
|
|
self.send(Packet::StreamEnd).await
|
|
}
|
|
}
|
|
|
|
/// Incoming XMPP events
|
|
///
|
|
/// In an `async fn` you may want to use this with `use
|
|
/// futures::stream::StreamExt;`
|
|
impl Stream for Client {
|
|
type Item = Event;
|
|
|
|
/// Low-level read on the XMPP stream, allowing the underlying
|
|
/// machinery to:
|
|
///
|
|
/// * connect,
|
|
/// * starttls,
|
|
/// * authenticate,
|
|
/// * bind a session, and finally
|
|
/// * receive stanzas
|
|
///
|
|
/// ...for your client
|
|
fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context) -> Poll<Option<Self::Item>> {
|
|
let state = replace(&mut self.state, ClientState::Invalid);
|
|
|
|
match state {
|
|
ClientState::Invalid => panic!("Invalid client state"),
|
|
ClientState::Disconnected if self.reconnect => {
|
|
// TODO: add timeout
|
|
let mut local = LocalSet::new();
|
|
let connect = local.spawn_local(Self::connect(
|
|
self.config.server.clone(),
|
|
self.config.jid.clone(),
|
|
self.config.password.clone(),
|
|
));
|
|
let _ = Pin::new(&mut local).poll(cx);
|
|
self.state = ClientState::Connecting(connect, local);
|
|
self.poll_next(cx)
|
|
}
|
|
ClientState::Disconnected => Poll::Ready(None),
|
|
ClientState::Connecting(mut connect, mut local) => {
|
|
match Pin::new(&mut connect).poll(cx) {
|
|
Poll::Ready(Ok(Ok(stream))) => {
|
|
let bound_jid = stream.jid.clone();
|
|
self.state = ClientState::Connected(stream);
|
|
Poll::Ready(Some(Event::Online {
|
|
bound_jid,
|
|
resumed: false,
|
|
}))
|
|
}
|
|
Poll::Ready(Ok(Err(e))) => {
|
|
self.state = ClientState::Disconnected;
|
|
return Poll::Ready(Some(Event::Disconnected(e.into())));
|
|
}
|
|
Poll::Ready(Err(e)) => {
|
|
self.state = ClientState::Disconnected;
|
|
panic!("connect task: {}", e);
|
|
}
|
|
Poll::Pending => {
|
|
let _ = Pin::new(&mut local).poll(cx);
|
|
|
|
self.state = ClientState::Connecting(connect, local);
|
|
Poll::Pending
|
|
}
|
|
}
|
|
}
|
|
ClientState::Connected(mut stream) => {
|
|
// Poll sink
|
|
match Pin::new(&mut stream).poll_ready(cx) {
|
|
Poll::Pending => (),
|
|
Poll::Ready(Ok(())) => (),
|
|
Poll::Ready(Err(e)) => {
|
|
self.state = ClientState::Disconnected;
|
|
return Poll::Ready(Some(Event::Disconnected(e.into())));
|
|
}
|
|
};
|
|
|
|
// Poll stream
|
|
match Pin::new(&mut stream).poll_next(cx) {
|
|
Poll::Ready(None) => {
|
|
// EOF
|
|
self.state = ClientState::Disconnected;
|
|
Poll::Ready(Some(Event::Disconnected(Error::Disconnected)))
|
|
}
|
|
Poll::Ready(Some(Ok(Packet::Stanza(stanza)))) => {
|
|
// Receive stanza
|
|
self.state = ClientState::Connected(stream);
|
|
Poll::Ready(Some(Event::Stanza(stanza)))
|
|
}
|
|
Poll::Ready(Some(Ok(Packet::Text(_)))) => {
|
|
// Ignore text between stanzas
|
|
self.state = ClientState::Connected(stream);
|
|
Poll::Pending
|
|
}
|
|
Poll::Ready(Some(Ok(Packet::StreamStart(_)))) => {
|
|
// <stream:stream>
|
|
self.state = ClientState::Disconnected;
|
|
Poll::Ready(Some(Event::Disconnected(
|
|
ProtocolError::InvalidStreamStart.into(),
|
|
)))
|
|
}
|
|
Poll::Ready(Some(Ok(Packet::StreamEnd))) => {
|
|
// End of stream: </stream:stream>
|
|
self.state = ClientState::Disconnected;
|
|
Poll::Ready(Some(Event::Disconnected(Error::Disconnected)))
|
|
}
|
|
Poll::Pending => {
|
|
// Try again later
|
|
self.state = ClientState::Connected(stream);
|
|
Poll::Pending
|
|
}
|
|
Poll::Ready(Some(Err(e))) => {
|
|
self.state = ClientState::Disconnected;
|
|
Poll::Ready(Some(Event::Disconnected(e.into())))
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/// Outgoing XMPP packets
|
|
///
|
|
/// See `send_stanza()` for an `async fn`
|
|
impl Sink<Packet> for Client {
|
|
type Error = Error;
|
|
|
|
fn start_send(mut self: Pin<&mut Self>, item: Packet) -> Result<(), Self::Error> {
|
|
match self.state {
|
|
ClientState::Connected(ref mut stream) => {
|
|
Pin::new(stream).start_send(item).map_err(|e| e.into())
|
|
}
|
|
_ => Err(Error::InvalidState),
|
|
}
|
|
}
|
|
|
|
fn poll_ready(mut self: Pin<&mut Self>, cx: &mut Context) -> Poll<Result<(), Self::Error>> {
|
|
match self.state {
|
|
ClientState::Connected(ref mut stream) => {
|
|
Pin::new(stream).poll_ready(cx).map_err(|e| e.into())
|
|
}
|
|
_ => Poll::Pending,
|
|
}
|
|
}
|
|
|
|
fn poll_flush(mut self: Pin<&mut Self>, cx: &mut Context) -> Poll<Result<(), Self::Error>> {
|
|
match self.state {
|
|
ClientState::Connected(ref mut stream) => {
|
|
Pin::new(stream).poll_flush(cx).map_err(|e| e.into())
|
|
}
|
|
_ => Poll::Pending,
|
|
}
|
|
}
|
|
|
|
fn poll_close(mut self: Pin<&mut Self>, cx: &mut Context) -> Poll<Result<(), Self::Error>> {
|
|
match self.state {
|
|
ClientState::Connected(ref mut stream) => {
|
|
Pin::new(stream).poll_close(cx).map_err(|e| e.into())
|
|
}
|
|
_ => Poll::Pending,
|
|
}
|
|
}
|
|
}
|