xmlstream: implement simple timeout logic

This allows to detect and handle dying streams without getting stuck
forever.

Timeouts are always wrong, though, so we put the burden of choosing the
right values (mostly) on the creator of a stream.

tokio-xmpp/src/component/mod.rs

@@ -6,8 +6,10 @@ use std::str::FromStr;
 use xmpp_parsers::jid::Jid;
 
 use crate::{
-    component::login::component_login, connect::ServerConnector, xmlstream::XmppStream, Error,
-    Stanza,
+    component::login::component_login,
+    connect::ServerConnector,
+    xmlstream::{Timeouts, XmppStream},
+    Error, Stanza,
 };
 
 #[cfg(any(feature = "starttls", feature = "insecure-tcp"))]
@@ -46,7 +48,13 @@ impl Component<TcpServerConnector> {
     /// Start a new XMPP component over plaintext TCP to localhost:5347
     #[cfg(feature = "insecure-tcp")]
     pub async fn new(jid: &str, password: &str) -> Result<Self, Error> {
-        Self::new_plaintext(jid, password, DnsConfig::addr("127.0.0.1:5347")).await
+        Self::new_plaintext(
+            jid,
+            password,
+            DnsConfig::addr("127.0.0.1:5347"),
+            Timeouts::tight(),
+        )
+        .await
     }
 
     /// Start a new XMPP component over plaintext TCP
@@ -55,8 +63,15 @@ impl Component<TcpServerConnector> {
         jid: &str,
         password: &str,
         dns_config: DnsConfig,
+        timeouts: Timeouts,
     ) -> Result<Self, Error> {
-        Component::new_with_connector(jid, password, TcpServerConnector::from(dns_config)).await
+        Component::new_with_connector(
+            jid,
+            password,
+            TcpServerConnector::from(dns_config),
+            timeouts,
+        )
+        .await
     }
 }
 
@@ -69,10 +84,11 @@ impl<C: ServerConnector> Component<C> {
         jid: &str,
         password: &str,
         connector: C,
+        timeouts: Timeouts,
     ) -> Result<Self, Error> {
         let jid = Jid::from_str(jid)?;
         let password = password.to_owned();
-        let stream = component_login(connector, jid.clone(), password).await?;
+        let stream = component_login(connector, jid.clone(), password, timeouts).await?;
         Ok(Component { jid, stream })
     }
 }