QUIC - disable QUIC if packet loss rate is bad for a connection.

net/quic/quic_stream_factory.h

Index: net/quic/quic_stream_factory.h
diff --git a/net/quic/quic_stream_factory.h b/net/quic/quic_stream_factory.h
index 6446e11356f6b964c3c0c3970bbf01583e1323fc..067c99c21c87adac9272821688f5c82a839dbb5a 100644
--- a/net/quic/quic_stream_factory.h
+++ b/net/quic/quic_stream_factory.h
@@ -108,6 +108,8 @@ class NET_EXPORT_PRIVATE QuicStreamFactory
       bool enable_connection_racing,
       bool enable_non_blocking_io,
       bool disable_disk_cache,
+      int number_of_lossy_handshakes,
+      int packet_loss_threshold,
       int socket_receive_buffer_size,
       const QuicTagVector& connection_options);
   ~QuicStreamFactory() override;
@@ -124,6 +126,14 @@ class NET_EXPORT_PRIVATE QuicStreamFactory
              const BoundNetLog& net_log,
              QuicStreamRequest* request);
 
+  // Called by a session when crypto handshake is either confirmed or timedout.
+  // Returns QUIC_NO_ERROR if there is no high packet loss. If there is a bad
+  // packet loss rate, marks QUIC as recently broken for the given |server_id|
+  // and returns QUIC_BAD_PACKET_LOSS_RATE.
+  QuicErrorCode OnCryptoHandshakeCompleted(QuicClientSession* session,
+                                           const QuicServerId& server_id,
+                                           int number_of_handshakes);
+
   // Called by a session when it becomes idle.
   void OnIdleSession(QuicClientSession* session);
 
@@ -327,6 +337,14 @@ class NET_EXPORT_PRIVATE QuicStreamFactory
   // Set if we do not want to load server config from the disk cache.
   bool disable_disk_cache_;
 
+  // Set if we want to disable QUIC for a connection if packet loss rate is bad.
+  int number_of_lossy_handshakes_;

[Ryan Hamilton, 2015/03/21 00:04:46]

I wonder if this should be a count of "Connections" instead of handshakes. Not
sure.

[ramant (doing other things), 2015/03/21 03:46:05]

Done.

+  int packet_loss_threshold_;
+
+  // Set if we do not want to use 0-RTT (not load server config from disk
+  // cache).
+  bool disable_zero_rtt_;

[Ryan Hamilton, 2015/03/21 00:04:46]

As we discussed, I don't think we need this.

[ramant (doing other things), 2015/03/21 03:46:05]

Done.

+
   // Size of the UDP receive buffer.
   int socket_receive_buffer_size_;