Fix gstreamer, at least a little bit.

[kixelated]

No description provided.

[claude]

Claude finished @kixelated's task —— View job

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PR Review: Fix gstreamer

Reviewing this PR for bugs and security issues.

Todo List:

• Read and analyze changed files
• Review Cargo.toml and Cargo.lock changes
• Analyze gstreamer sink implementation changes
• Analyze gstreamer source implementation changes
• Check justfile modifications
• Provide findings and recommendations

Findings

🐛 Bugs and Issues:

1. Race Condition Hack - rs/hang-gst/src/source/imp.rs:179

   // TODO giant hack to avoid a race condition with how announcements are now populated.
   tokio::time::sleep(std::time::Duration::from_millis(100)).await;

   This hardcoded 100ms sleep is acknowledged as a "giant hack" and indicates an underlying race condition that should be properly fixed rather than worked around.

2. Panic-prone Error Handling - Multiple locations use .expect() calls that can panic:

   • rs/hang-gst/src/sink/imp.rs:171: client.connect(url.clone()).await.expect("failed to connect")
   • rs/hang-gst/src/sink/imp.rs:174-176: Session::connect().expect("failed to connect")
   • rs/hang-gst/src/source/imp.rs:182: origin.consume(&name).expect("broadcast not found")
   • rs/hang-gst/src/source/imp.rs:237,330: track.read().await.expect("failed to read frame")

3. Missing Cleanup - rs/hang-gst/src/source/imp.rs:365

   fn cleanup(&self) {
       // TODO kill spawned tasks
   }

   Background tokio tasks are spawned but never properly cleaned up, potentially causing resource leaks.

⚠️ Potential Security Concerns:

4. TLS Verification Bypass - The tls-disable-verify option allows disabling certificate verification, which could be misused in production environments if not properly documented or restricted.

Recommendations

• Replace the race condition workaround with proper synchronization
• Convert .expect() calls to proper error handling with Result returns
• Implement task cleanup in the cleanup() method to prevent resource leaks
• Consider adding warnings when TLS verification is disabled

✅ Good Changes:

• Re-enabling the gstreamer workspace member makes it buildable again
• Renaming "name" to "broadcast" improves API consistency
• License string standardization

[cursor]

Bug: Race Condition Workaround Causes Crashes

A fixed 100ms sleep is used as an unreliable workaround for a race condition. This arbitrary delay may be insufficient under varying conditions, causing the application to panic with "broadcast not found" via an .expect() call if the broadcast isn't available. This leads to runtime crashes instead of proper synchronization or error handling.

rs/hang-gst/src/source/imp.rs#L177-L183

https://github.com/kixelated/moq/blob/9f9da422dddc62c33de8ba4720af8683977f045c/rs/hang-gst/src/source/imp.rs#L177-L183

Fix in Cursor • Fix in Web

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