added TURN support

README.md

@@ -116,3 +116,7 @@ The dependency `gstreamer` is licensed under the GNU Lesser General Public Licen
 Any kinds of contributions are welcome as a pull request.
 
 Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in these crates by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.
+
+## Acknowledgements
+
+`gst-meet` development is sponsored by [AVStack](https://www.avstack.io/). We provide globally-distributed, scalable, managed Jitsi Meet backends.

lib-gst-meet/src/conference.rs

@@ -21,12 +21,7 @@ use xmpp_parsers::{
   BareJid, Element, FullJid, Jid,
 };
 
-use crate::{
-  jingle::JingleSession,
-  source::MediaType,
-  stanza_filter::StanzaFilter,
-  xmpp,
-};
+use crate::{jingle::JingleSession, source::MediaType, stanza_filter::StanzaFilter, xmpp};
 
 static DISCO_INFO: Lazy<DiscoInfoResult> = Lazy::new(|| DiscoInfoResult {
   node: None,
@@ -36,7 +31,6 @@ static DISCO_INFO: Lazy<DiscoInfoResult> = Lazy::new(|| DiscoInfoResult {
     Feature::new(ns::JINGLE_RTP_VIDEO),
     Feature::new(ns::JINGLE_ICE_UDP),
     Feature::new(ns::JINGLE_DTLS),
-
     // not supported yet: rtx
     // Feature::new("urn:ietf:rfc:4588"),
 

lib-gst-meet/src/connection.rs

@@ -280,7 +280,9 @@ impl JitsiConnection {
           }
 
           let iq = Iq::from_get(generate_id(), xmpp::extdisco::ServicesQuery {})
-            .with_from(Jid::Full(locked_inner.jid.as_ref().context("missing jid")?.clone()))
+            .with_from(Jid::Full(
+              locked_inner.jid.as_ref().context("missing jid")?.clone(),
+            ))
             .with_to(Jid::Bare(locked_inner.xmpp_domain.clone()));
           tx.send(iq.into()).await?;
           locked_inner.state = DiscoveringExternalServices;

lib-gst-meet/src/jingle.rs

@@ -34,6 +34,7 @@ use crate::{
 };
 
 const DEFAULT_STUN_PORT: u16 = 3478;
+const DEFAULT_TURNS_PORT: u16 = 5349;
 
 pub(crate) struct JingleSession {
   pipeline: gstreamer::Pipeline,
@@ -198,7 +199,10 @@ impl JingleSession {
     }
 
     if let Some(remote_fingerprint) = dtls_fingerprint {
-      warn!("Remote DTLS fingerprint (verification not implemented yet): {:?}", remote_fingerprint);
+      warn!(
+        "Remote DTLS fingerprint (verification not implemented yet): {:?}",
+        remote_fingerprint
+      );
     }
 
     let mut dtls_cert_params = CertificateParams::new(vec!["gst-meet".to_owned()]);
@@ -225,13 +229,23 @@ impl JingleSession {
     debug!("audio SSRC: {}", audio_ssrc);
     debug!("video SSRC: {}", video_ssrc);
 
+    let ice_agent = nice::Agent::new(&conference.glib_main_context, nice::Compatibility::Rfc5245);
+    ice_agent.set_ice_tcp(false);
+    ice_agent.set_upnp(false);
+    let ice_stream_id = ice_agent.add_stream(1);
+    let ice_component_id = 1;
+
     let maybe_stun = conference
       .external_services
       .iter()
       .find(|svc| svc.r#type == "stun");
 
     let stun_addr = if let Some(stun) = maybe_stun {
-      lookup_host(format!("{}:{}", stun.host, stun.port.unwrap_or(DEFAULT_STUN_PORT)))
+      lookup_host(format!(
+        "{}:{}",
+        stun.host,
+        stun.port.unwrap_or(DEFAULT_STUN_PORT)
+      ))
       .await?
       .next()
     }
@@ -240,21 +254,38 @@ impl JingleSession {
     };
     debug!("STUN address: {:?}", stun_addr);
 
-    let ice_agent = nice::Agent::new(&conference.glib_main_context, nice::Compatibility::Rfc5245);
-    ice_agent.set_ice_tcp(false);
     if let Some((stun_addr, stun_port)) = stun_addr.map(|sa| (sa.ip().to_string(), sa.port())) {
       ice_agent.set_stun_server(Some(&stun_addr));
       ice_agent.set_stun_server_port(stun_port as u32);
     }
-    ice_agent.set_upnp(false);
-    ice_agent.connect_component_state_changed(|_, a, b, c| {
-      debug!("ICE component-state-changed {} {} {}", a, b, c);
-    });
-    ice_agent.connect_new_selected_pair(|_, a, b, c, d| {
-      debug!("ICE new-selected-pair {} {} {} {}", a, b, c, d);
-    });
-    let ice_stream_id = ice_agent.add_stream(1);
-    let ice_component_id = 1;
+
+    let maybe_turn = conference
+      .external_services
+      .iter()
+      .find(|svc| svc.r#type == "turns");
+
+    if let Some(turn_server) = maybe_turn {
+      let maybe_addr = lookup_host(format!(
+        "{}:{}",
+        turn_server.host,
+        turn_server.port.unwrap_or(DEFAULT_TURNS_PORT)
+      ))
+      .await?
+      .next();
+
+      if let Some(addr) = maybe_addr {
+        debug!("TURN address: {:?}", addr);
+        ice_agent.set_relay_info(
+          ice_stream_id,
+          ice_component_id,
+          &addr.ip().to_string(),
+          addr.port() as u32,
+          turn_server.username.as_deref().unwrap_or_default(),
+          turn_server.password.as_deref().unwrap_or_default(),
+          nice::RelayType::Tls,
+        );
+      }
+    }
 
     if !ice_agent.attach_recv(
       ice_stream_id,
@@ -716,8 +747,7 @@ impl JingleSession {
       });
       description.ssrcs = vec![ssrc];
 
-      let mut transport = IceUdpTransport::new()
-        .with_fingerprint(Fingerprint {
+      let mut transport = IceUdpTransport::new().with_fingerprint(Fingerprint {
         hash: Algo::Sha_256,
         setup: Some(Setup::Active),
         value: fingerprint.clone(),

lib-gst-meet/src/lib.rs

@@ -1,11 +1,11 @@
 pub mod conference;
 pub mod connection;
 mod jingle;
-mod xmpp;
 mod pinger;
 pub mod source;
 mod stanza_filter;
 mod util;
+mod xmpp;
 
 pub use crate::{
   conference::{JitsiConference, JitsiConferenceConfig, Participant},

lib-gst-meet/src/xmpp/extdisco.rs

@@ -1,10 +1,7 @@
 use std::convert::TryFrom;
 
 use anyhow::{bail, Context, Result};
-use xmpp_parsers::{
-  Element,
-  iq::IqGetPayload,
-};
+use xmpp_parsers::{iq::IqGetPayload, Element};
 
 use crate::xmpp::ns;
 
@@ -56,17 +53,21 @@ impl TryFrom<Element> for ServicesResult {
     Ok(ServicesResult {
       services: elem
         .children()
-        .map(|child| Ok(Service {
+        .map(|child| {
+          Ok(Service {
             r#type: child.attr("type").context("missing type attr")?.to_owned(),
             name: child.attr("name").map(ToOwned::to_owned),
             host: child.attr("host").context("missing host attr")?.to_owned(),
             port: child.attr("port").map(|p| p.parse()).transpose()?,
             transport: child.attr("transport").map(ToOwned::to_owned),
-          restricted: child.attr("restricted").map(|b| b.to_lowercase() == "parse" || b == "1"),
+            restricted: child
+              .attr("restricted")
+              .map(|b| b.to_lowercase() == "parse" || b == "1"),
             username: child.attr("username").map(ToOwned::to_owned),
             password: child.attr("password").map(ToOwned::to_owned),
             expires: child.attr("expires").map(ToOwned::to_owned),
-        }))
+          })
+        })
         .collect::<Result<_>>()?,
     })
   }