feat(protocol): freeze M4 native session RC6 contract

tools/native_conformance.rs

@@ -38,6 +38,8 @@ fn evaluate(version: &str, kind: &str, input: &str) -> &'static str {
             values.get("device_key_id").cloned().unwrap_or_default(),
             values.get("pool_id").cloned().unwrap_or_default(),
             values.get("idempotency_key").cloned().unwrap_or_default(),
+            vec![VideoProfile::new("h264".into(), 8, "4:2:0".into(), "bt709-limited".into(), "sdr".into()).unwrap()],
+            BitratePreference::new("auto".into(), None).unwrap(),
             None,
         ) {
             Ok(_) => "valid",
@@ -184,6 +186,9 @@ fn classify_gateway_input(encoded: &str) -> &'static str {
         }
         7 if body.len() == 4 => "valid",
         7 => "invalid:length",
+        8 if body.len() != 8 => "invalid:length",
+        8 if body[0] > 15 || body[3] > 3 => "invalid:field",
+        8 => "valid",
         _ => "invalid:kind",
     }
 }
@@ -219,6 +224,12 @@ fn classify_gateway_feedback(encoded: &str) -> &'static str {
             2 => "invalid:field",
             3 if body.is_empty() => "valid",
             3 => "invalid:length",
+            4 if body.len() == 24 && body[..16].iter().any(|value| *value != 0) && body[16..24].iter().any(|value| *value != 0) => "valid",
+            4 if body.len() != 24 => "invalid:length",
+            4 => "invalid:field",
+            5 if body.len() == 16 && body.iter().any(|value| *value != 0) => "valid",
+            5 if body.len() != 16 => "invalid:length",
+            5 => "invalid:field",
             _ => "invalid:type",
         };
     }