fix: crash when set custom ext

src/change/sdp.rs

@@ -1032,14 +1032,13 @@ fn update_media(
     media.set_remote_pts(pts);
 
     let mut remote_extmap = ExtensionMap::empty();
-    for (id, ext) in m.extmaps().into_iter() {
+    for (id, _ext) in m.extmaps().into_iter() {
         // The remapping of extensions should already have happened, which
         // means the ID are matching in the session to the remote.
-        if exts.lookup(id) != Some(ext) {
-            // Don't set any extensions that aren't enabled in Session.
-            continue;
+        // Only set extensions that are enabled in Session.
+        if let Some(ext) = exts.lookup(id) {
+            remote_extmap.set(id, ext.clone());
         }
-        remote_extmap.set(id, ext.clone());
     }
     media.set_remote_extmap(remote_extmap);
 

tests/user-rtp-header-extension.rs

@@ -1,6 +1,7 @@
 use std::net::Ipv4Addr;
 use std::time::Duration;
 
+use str0m::change::SdpOffer;
 use str0m::format::Codec;
 use str0m::media::{Direction, MediaKind};
 use str0m::rtp::Extension;
@@ -89,8 +90,10 @@ pub fn user_rtp_header_extension() -> Result<(), RtcError> {
     let mut change = l.sdp_api();
     let mid = change.add_media(MediaKind::Audio, Direction::SendRecv, None, None);
     let (offer, pending) = change.apply().unwrap();
-
-    let answer = r.rtc.sdp_api().accept_offer(offer)?;
+    let offer_str = offer.to_sdp_string();
+    let offer_parsed =
+        SdpOffer::from_sdp_string(&offer_str).expect("Should parse offer from string");
+    let answer = r.rtc.sdp_api().accept_offer(offer_parsed)?;
     l.rtc.sdp_api().accept_answer(pending, answer)?;
 
     // Verify that the extension is negotiated.