Add GoAway support

src/proto/connection.rs

@@ -128,6 +128,12 @@ impl<T, P, B> Connection<T, P, B>
 
                     // TODO: ACK must be sent THEN settings applied.
                 }
+                Some(GoAway(frame)) => {
+                    // TODO: handle the last_stream_id. Also, should this be
+                    // handled as an error?
+                    let e = ConnectionError::Proto(frame.reason());
+                    return Ok(().into());
+                }
                 Some(Ping(frame)) => {
                     trace!("recv PING; frame={:?}", frame);
                     self.ping_pong.recv_ping(frame);

src/proto/framed_read.rs

@@ -64,7 +64,6 @@ impl<T> FramedRead<T> {
                 let _ = bytes.split_to(frame::HEADER_LEN);
                 frame::Data::load(head, bytes)?.into()
             }
-
             Kind::Headers => {
                 let mut buf = Cursor::new(bytes);
                 buf.set_position(frame::HEADER_LEN as u64);
@@ -80,16 +79,11 @@ impl<T> FramedRead<T> {
 
                 frame.into()
             }
-
             Kind::Reset => {
                 frame::Reset::load(head, &bytes[frame::HEADER_LEN..])?.into()
             }
-
-            // TODO
-
             Kind::GoAway => {
-                let _todo = try!(frame::GoAway::load(&bytes[frame::HEADER_LEN..]));
-                unimplemented!();
+                frame::GoAway::load(&bytes[frame::HEADER_LEN..])?.into()
             }
             Kind::PushPromise => {
                 frame::PushPromise::load(head, &bytes[frame::HEADER_LEN..])?.into()

src/proto/framed_write.rs

@@ -141,6 +141,10 @@ impl<T, B> Sink for FramedWrite<T, B>
                 v.encode(self.buf.get_mut());
                 trace!("encoded settings; rem={:?}", self.buf.remaining());
             }
+            Frame::GoAway(v) => {
+                v.encode(self.buf.get_mut());
+                trace!("encoded go_away; rem={:?}", self.buf.remaining());
+            }
             Frame::Ping(v) => {
                 v.encode(self.buf.get_mut());
                 trace!("encoded ping; rem={:?}", self.buf.remaining());