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use std::str;
use std::sync::Arc;
use quick_xml::{events::Event, se::Serializer, NsReader, Writer};
use rsasl::prelude::SASLConfig;
use serde::Serialize;
use tokio::io::{AsyncRead, AsyncWrite, AsyncWriteExt, BufReader, ReadHalf, WriteHalf};
use tracing::{debug, info, trace};
use crate::connection::{Tls, Unencrypted};
use crate::error::JabberError;
use crate::stanza::stream::Stream;
use crate::stanza::DECLARATION;
use crate::Result;
use crate::JID;
pub struct Jabber<S>
where
S: AsyncRead + AsyncWrite + Unpin,
{
reader: NsReader<BufReader<ReadHalf<S>>>,
writer: WriteHalf<S>,
jid: Option<JID>,
auth: Option<Arc<SASLConfig>>,
server: String,
}
impl<S> Jabber<S>
where
S: AsyncRead + AsyncWrite + Unpin,
{
pub fn new(
reader: ReadHalf<S>,
writer: WriteHalf<S>,
jid: Option<JID>,
auth: Option<Arc<SASLConfig>>,
server: String,
) -> Self {
let reader = NsReader::from_reader(BufReader::new(reader));
Self {
reader,
writer,
jid,
auth,
server,
}
}
}
impl<S> Jabber<S>
where
S: AsyncRead + AsyncWrite + Unpin,
{
// pub async fn negotiate(self) -> Result<Jabber<S>> {}
pub async fn start_stream(&mut self) -> Result<()> {
// client to server
// declaration
let mut xmlwriter = Writer::new(&mut self.writer);
xmlwriter.write_event_async(DECLARATION.clone()).await?;
// opening stream element
let server = &self.server.to_owned().try_into()?;
let stream_element = Stream::new_client(None, server, None, "en");
// TODO: nicer function to serialize to xml writer
let mut buffer = String::new();
let ser = Serializer::with_root(&mut buffer, Some("stream:stream")).expect("stream name");
stream_element.serialize(ser).unwrap();
trace!("sent: {}", buffer);
self.writer.write_all(buffer.as_bytes()).await.unwrap();
// server to client
// may or may not send a declaration
let mut buf = Vec::new();
let mut first_event = self.reader.read_resolved_event_into_async(&mut buf).await?;
trace!("received: {:?}", first_event);
match first_event {
(quick_xml::name::ResolveResult::Unbound, Event::Decl(e)) => {
if let Ok(version) = e.version() {
if version.as_ref() == b"1.0" {
first_event = self.reader.read_resolved_event_into_async(&mut buf).await?;
trace!("received: {:?}", first_event);
} else {
// todo: error
todo!()
}
} else {
first_event = self.reader.read_resolved_event_into_async(&mut buf).await?;
trace!("received: {:?}", first_event);
}
}
_ => (),
}
// receive stream element and validate
match first_event {
(quick_xml::name::ResolveResult::Bound(ns), Event::Start(e)) => {
if ns.0 == crate::stanza::stream::XMLNS.as_bytes() {
e.attributes().try_for_each(|attr| -> Result<()> {
let attr = attr?;
match attr.key.into_inner() {
b"from" => {
self.server = str::from_utf8(&attr.value)?.to_owned();
Ok(())
}
_ => Ok(()),
}
});
return Ok(());
} else {
return Err(JabberError::BadStream);
}
}
// TODO: errors for incorrect namespace
_ => Err(JabberError::BadStream),
}
}
}
// pub async fn get_features(&mut self) -> Result<Vec<StreamFeature>> {
// Element::read(&mut self.reader).await?.try_into()
// }
impl Jabber<Unencrypted> {
pub async fn starttls(&mut self) -> Result<Jabber<Tls>> {
todo!()
}
// let mut starttls_element = BytesStart::new("starttls");
// starttls_element.push_attribute(("xmlns", "urn:ietf:params:xml:ns:xmpp-tls"));
// self.writer
// .write_event_async(Event::Empty(starttls_element))
// .await
// .unwrap();
// let mut buf = Vec::new();
// match self.reader.read_event_into_async(&mut buf).await.unwrap() {
// Event::Empty(e) => match e.name() {
// QName(b"proceed") => {
// let connector = TlsConnector::new().unwrap();
// let stream = self
// .reader
// .into_inner()
// .into_inner()
// .unsplit(self.writer.into_inner());
// if let Ok(tlsstream) = tokio_native_tls::TlsConnector::from(connector)
// .connect(&self.jabber.server, stream)
// .await
// {
// let (read, write) = tokio::io::split(tlsstream);
// let reader = Reader::from_reader(BufReader::new(read));
// let writer = Writer::new(write);
// let mut client =
// super::encrypted::JabberClient::new(reader, writer, self.jabber);
// client.start_stream().await?;
// return Ok(client);
// }
// }
// QName(_) => return Err(JabberError::TlsNegotiation),
// },
// _ => return Err(JabberError::TlsNegotiation),
// }
// Err(JabberError::TlsNegotiation)
// }
}
impl std::fmt::Debug for Jabber<Tls> {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
f.debug_struct("Jabber")
.field("connection", &"tls")
.field("jid", &self.jid)
.field("auth", &self.auth)
.field("server", &self.server)
.finish()
}
}
impl std::fmt::Debug for Jabber<Unencrypted> {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
f.debug_struct("Jabber")
.field("connection", &"unencrypted")
.field("jid", &self.jid)
.field("auth", &self.auth)
.field("server", &self.server)
.finish()
}
}
#[cfg(test)]
mod tests {
use super::*;
use crate::connection::Connection;
use test_log::test;
#[test(tokio::test)]
async fn start_stream() {
let connection = Connection::connect("blos.sm").await.unwrap();
match connection {
Connection::Encrypted(mut c) => c.start_stream().await.unwrap(),
Connection::Unencrypted(mut c) => c.start_stream().await.unwrap(),
}
}
}
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