QUIC - disable QUIC under recent pathological connection errors.

net/http/http_network_session.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/http/http_network_session.h"
 
 #include <utility>
 
 #include "base/compiler_specific.h"
 #include "base/debug/stack_trace.h"
@@ skipping 42 matching lines @@
 
 // The maximum receive window sizes for HTTP/2 sessions and streams.
 const int32 kSpdySessionMaxRecvWindowSize = 15 * 1024 * 1024;  // 15 MB
 const int32 kSpdyStreamMaxRecvWindowSize = 6 * 1024 * 1024;    //  6 MB
 // QUIC's socket receive buffer size.
 // We should adaptively set this buffer size, but for now, we'll use a size
 // that seems large enough to receive data at line rate for most connections,
 // and does not consume "too much" memory.
 const int32 kQuicSocketReceiveBufferSize = 1024 * 1024;  // 1MB
 
+// Number of recent connections to consider for certain thresholds
+// that trigger disabling QUIC.  E.g. disable QUIC if PUBLIC_RESET was
+// received post handshake for at least 2 of 20 recent connections.
+const int32 kQuicMaxRecentDisabledReasons = 20;
+
 HttpNetworkSession::Params::Params()
     : client_socket_factory(NULL),
       host_resolver(NULL),
       cert_verifier(NULL),
       cert_policy_enforcer(NULL),
       channel_id_service(NULL),
       transport_security_state(NULL),
       cert_transparency_verifier(NULL),
       proxy_service(NULL),
       ssl_config_service(NULL),
@@ skipping 26 matching lines @@
       quic_disable_disk_cache(false),
       quic_prefer_aes(false),
       quic_max_number_of_lossy_connections(0),
       quic_packet_loss_threshold(1.0f),
       quic_socket_receive_buffer_size(kQuicSocketReceiveBufferSize),
       quic_clock(NULL),
       quic_random(NULL),
       quic_max_packet_length(kDefaultMaxPacketSize),
       enable_user_alternate_protocol_ports(false),
       quic_crypto_client_stream_factory(NULL),
+      quic_max_recent_disabled_reasons(kQuicMaxRecentDisabledReasons),
+      quic_threshold_public_resets_post_handshake(0),
+      quic_threshold_timeouts_streams_open(0),
       proxy_delegate(NULL) {
   quic_supported_versions.push_back(QUIC_VERSION_25);
 }
 
 HttpNetworkSession::Params::~Params() {}
 
 // TODO(mbelshe): Move the socket factories into HttpStreamFactory.
 HttpNetworkSession::HttpNetworkSession(const Params& params)
     : net_log_(params.net_log),
       network_delegate_(params.network_delegate),
@@ skipping 25 matching lines @@
           params.quic_always_require_handshake_confirmation,
           params.quic_disable_connection_pooling,
           params.quic_load_server_info_timeout_srtt_multiplier,
           params.quic_enable_connection_racing,
           params.quic_enable_non_blocking_io,
           params.quic_disable_disk_cache,
           params.quic_prefer_aes,
           params.quic_max_number_of_lossy_connections,
           params.quic_packet_loss_threshold,
           params.quic_socket_receive_buffer_size,
+          params.quic_max_recent_disabled_reasons,
+          params.quic_threshold_public_resets_post_handshake,
+          params.quic_threshold_timeouts_streams_open,
           params.quic_connection_options),
       spdy_session_pool_(params.host_resolver,
                          params.ssl_config_service,
                          params.http_server_properties,
                          params.transport_security_state,
                          params.enable_spdy_compression,
                          params.enable_spdy_ping_based_connection_checking,
                          params.spdy_default_protocol,
                          params.spdy_session_max_recv_window_size,
                          params.spdy_stream_max_recv_window_size,
@@ skipping 107 matching lines @@
   for (QuicTagVector::const_iterator it =
            params_.quic_connection_options.begin();
        it != params_.quic_connection_options.end(); ++it) {
     connection_options->AppendString("'" + QuicUtils::TagToString(*it) + "'");
   }
   dict->Set("connection_options", connection_options.Pass());
   dict->SetString("origin_to_force_quic_on",
                   params_.origin_to_force_quic_on.ToString());
   dict->SetDouble("alternative_service_probability_threshold",
                   params_.alternative_service_probability_threshold);
+  dict->SetString("disabled_reason",
+                  quic_stream_factory_.QuicDisabledReasonString());
   return dict.Pass();
 }
 
 void HttpNetworkSession::CloseAllConnections() {
   normal_socket_pool_manager_->FlushSocketPoolsWithError(ERR_ABORTED);
   websocket_socket_pool_manager_->FlushSocketPoolsWithError(ERR_ABORTED);
   spdy_session_pool_.CloseCurrentSessions(ERR_ABORTED);
   quic_stream_factory_.CloseAllSessions(ERR_ABORTED);
 }
 
@@ skipping 31 matching lines @@
     case WEBSOCKET_SOCKET_POOL:
       return websocket_socket_pool_manager_.get();
     default:
       NOTREACHED();
       break;
   }
   return NULL;
 }
 
 }  // namespace net