1 files changed, 87 insertions, 0 deletions
diff --git a/third_party/rust/h2/src/frame/go_away.rs b/third_party/rust/h2/src/frame/go_away.rs
new file mode 100644
index 0000000000..99330e9811
--- /dev/null
+++ b/third_party/rust/h2/src/frame/go_away.rs
@@ -0,0 +1,87 @@
+use std::fmt;
+
+use bytes::{BufMut, Bytes};
+
+use crate::frame::{self, Error, Head, Kind, Reason, StreamId};
+
+#[derive(Clone, Eq, PartialEq)]
+pub struct GoAway {
+    last_stream_id: StreamId,
+    error_code: Reason,
+    debug_data: Bytes,
+}
+
+impl GoAway {
+    pub fn new(last_stream_id: StreamId, reason: Reason) -> Self {
+        GoAway {
+            last_stream_id,
+            error_code: reason,
+            debug_data: Bytes::new(),
+        }
+    }
+
+    pub fn with_debug_data(last_stream_id: StreamId, reason: Reason, debug_data: Bytes) -> Self {
+        Self {
+            last_stream_id,
+            error_code: reason,
+            debug_data,
+        }
+    }
+
+    pub fn last_stream_id(&self) -> StreamId {
+        self.last_stream_id
+    }
+
+    pub fn reason(&self) -> Reason {
+        self.error_code
+    }
+
+    pub fn debug_data(&self) -> &Bytes {
+        &self.debug_data
+    }
+
+    pub fn load(payload: &[u8]) -> Result<GoAway, Error> {
+        if payload.len() < 8 {
+            return Err(Error::BadFrameSize);
+        }
+
+        let (last_stream_id, _) = StreamId::parse(&payload[..4]);
+        let error_code = unpack_octets_4!(payload, 4, u32);
+        let debug_data = Bytes::copy_from_slice(&payload[8..]);
+
+        Ok(GoAway {
+            last_stream_id,
+            error_code: error_code.into(),
+            debug_data,
+        })
+    }
+
+    pub fn encode<B: BufMut>(&self, dst: &mut B) {
+        tracing::trace!("encoding GO_AWAY; code={:?}", self.error_code);
+        let head = Head::new(Kind::GoAway, 0, StreamId::zero());
+        head.encode(8 + self.debug_data.len(), dst);
+        dst.put_u32(self.last_stream_id.into());
+        dst.put_u32(self.error_code.into());
+        dst.put(self.debug_data.slice(..));
+    }
+}
+
+impl<B> From<GoAway> for frame::Frame<B> {
+    fn from(src: GoAway) -> Self {
+        frame::Frame::GoAway(src)
+    }
+}
+
+impl fmt::Debug for GoAway {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        let mut builder = f.debug_struct("GoAway");
+        builder.field("error_code", &self.error_code);
+        builder.field("last_stream_id", &self.last_stream_id);
+
+        if !self.debug_data.is_empty() {
+            builder.field("debug_data", &self.debug_data);
+        }
+
+        builder.finish()
+    }
+}