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naiveproxy/net/spdy/spdy_session.cc
klzgrad 13d99938c3 h2: Reduce warnings about RST on invalid streams 
Per RFC 7540#6.4:

  However, after sending the RST_STREAM, the sending endpoint MUST be
  prepared to receive and process additional frames sent on the stream
  that might have been sent by the peer prior to the arrival of the
  RST_STREAM.
2018-08-11 05:36:17 +00:00

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// 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/spdy/spdy_session.h"
#include <algorithm>
#include <limits>
#include <map>
#include <string>
#include <utility>
#include "base/bind.h"
#include "base/feature_list.h"
#include "base/location.h"
#include "base/logging.h"
#include "base/metrics/histogram_functions.h"
#include "base/metrics/histogram_macros.h"
#include "base/single_thread_task_runner.h"
#include "base/stl_util.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_split.h"
#include "base/strings/string_util.h"
#include "base/strings/stringprintf.h"
#include "base/strings/utf_string_conversions.h"
#include "base/threading/thread_task_runner_handle.h"
#include "base/time/time.h"
#include "base/trace_event/memory_usage_estimator.h"
#include "base/trace_event/trace_event.h"
#include "base/values.h"
#include "net/base/url_util.h"
#include "net/cert/asn1_util.h"
#include "net/cert/cert_verify_result.h"
#include "net/cert/ct_policy_status.h"
#include "net/http/http_network_session.h"
#include "net/http/http_server_properties.h"
#include "net/http/http_util.h"
#include "net/http/http_vary_data.h"
#include "net/http/transport_security_state.h"
#include "net/log/net_log.h"
#include "net/log/net_log_capture_mode.h"
#include "net/log/net_log_event_type.h"
#include "net/log/net_log_source_type.h"
#include "net/log/net_log_with_source.h"
#include "net/quic/chromium/quic_http_utils.h"
#include "net/socket/socket.h"
#include "net/socket/ssl_client_socket.h"
#include "net/spdy/header_coalescer.h"
#include "net/spdy/spdy_buffer_producer.h"
#include "net/spdy/spdy_http_utils.h"
#include "net/spdy/spdy_log_util.h"
#include "net/spdy/spdy_session_pool.h"
#include "net/spdy/spdy_stream.h"
#include "net/ssl/channel_id_service.h"
#include "net/ssl/ssl_cipher_suite_names.h"
#include "net/ssl/ssl_connection_status_flags.h"
#include "net/third_party/quic/core/spdy_utils.h"
#include "net/third_party/spdy/core/spdy_frame_builder.h"
#include "net/third_party/spdy/core/spdy_protocol.h"
#include "url/url_constants.h"
namespace net {
namespace {
constexpr net::NetworkTrafficAnnotationTag
kSpdySessionCommandsTrafficAnnotation =
net::DefineNetworkTrafficAnnotation("spdy_session_control", R"(
semantics {
sender: "Spdy Session"
description:
"Sends commands to control an HTTP/2 session."
trigger:
"Required control commands like initiating stream, requesting "
"stream reset, changing priorities, etc."
data: "No user data."
destination: OTHER
destination_other:
"Any destination the HTTP/2 session is connected to."
}
policy {
cookies_allowed: NO
setting: "This feature cannot be disabled in settings."
policy_exception_justification: "Essential for network access."
}
)");
const int kReadBufferSize = 8 * 1024;
const int kDefaultConnectionAtRiskOfLossSeconds = 10;
const int kHungIntervalSeconds = 10;
// Lifetime of unclaimed pushed stream, in seconds: after this period, a pushed
// stream is cancelled if still not claimed.
const int kPushedStreamLifetimeSeconds = 300;
// Default initial value for HTTP/2 SETTINGS.
const uint32_t kDefaultInitialHeaderTableSize = 4096;
const uint32_t kDefaultInitialEnablePush = 1;
const uint32_t kDefaultInitialInitialWindowSize = 65535;
const uint32_t kDefaultInitialMaxFrameSize = 16384;
// The maximum size of header list that the server is allowed to send.
const uint32_t kSpdyMaxHeaderListSize = 256 * 1024;
// Values of Vary response header on pushed streams. This is logged to
// Net.PushedStreamVaryResponseHeader, entries must not be changed.
enum PushedStreamVaryResponseHeaderValues {
// There is no Vary header.
kNoVaryHeader = 0,
// The value of Vary is empty.
kVaryIsEmpty = 1,
// The value of Vary is "*".
kVaryIsStar = 2,
// The value of Vary is "accept-encoding" (case insensitive).
kVaryIsAcceptEncoding = 3,
// The value of Vary contains "accept-encoding" (case insensitive) and some
// other field names as well.
kVaryHasAcceptEncoding = 4,
// The value of Vary does not contain "accept-encoding", is not empty, and is
// not "*".
kVaryHasNoAcceptEncoding = 5,
// The number of entries above.
kNumberOfVaryEntries = 6
};
// String literals for parsing the Vary header in a pushed response.
const char kVary[] = "vary";
const char kStar[] = "*";
const char kAcceptEncoding[] = "accept-encoding";
enum PushedStreamVaryResponseHeaderValues ParseVaryInPushedResponse(
const spdy::SpdyHeaderBlock& headers) {
spdy::SpdyHeaderBlock::iterator it = headers.find(kVary);
if (it == headers.end())
return kNoVaryHeader;
base::StringPiece value(it->second);
if (value.empty())
return kVaryIsEmpty;
if (value == kStar)
return kVaryIsStar;
std::string lowercase_value = ToLowerASCII(value);
if (lowercase_value == kAcceptEncoding)
return kVaryIsAcceptEncoding;
// Both comma and newline delimiters occur in the wild.
for (const auto& substr :
SplitString(lowercase_value, ",\n", base::TRIM_WHITESPACE,
base::SPLIT_WANT_NONEMPTY)) {
if (substr == kAcceptEncoding)
return kVaryHasAcceptEncoding;
}
return kVaryHasNoAcceptEncoding;
}
bool IsSpdySettingAtDefaultInitialValue(spdy::SpdySettingsId setting_id,
uint32_t value) {
switch (setting_id) {
case spdy::SETTINGS_HEADER_TABLE_SIZE:
return value == kDefaultInitialHeaderTableSize;
case spdy::SETTINGS_ENABLE_PUSH:
return value == kDefaultInitialEnablePush;
case spdy::SETTINGS_MAX_CONCURRENT_STREAMS:
// There is no initial limit on the number of concurrent streams.
return false;
case spdy::SETTINGS_INITIAL_WINDOW_SIZE:
return value == kDefaultInitialInitialWindowSize;
case spdy::SETTINGS_MAX_FRAME_SIZE:
return value == kDefaultInitialMaxFrameSize;
case spdy::SETTINGS_MAX_HEADER_LIST_SIZE:
// There is no initial limit on the size of the header list.
return false;
case spdy::SETTINGS_ENABLE_CONNECT_PROTOCOL:
return value == 0;
default:
// Undefined parameters have no initial value.
return false;
}
}
std::unique_ptr<base::Value> NetLogSpdyHeadersSentCallback(
const spdy::SpdyHeaderBlock* headers,
bool fin,
spdy::SpdyStreamId stream_id,
bool has_priority,
int weight,
spdy::SpdyStreamId parent_stream_id,
bool exclusive,
NetLogSource source_dependency,
NetLogCaptureMode capture_mode) {
auto dict = std::make_unique<base::DictionaryValue>();
dict->Set("headers", ElideSpdyHeaderBlockForNetLog(*headers, capture_mode));
dict->SetBoolean("fin", fin);
dict->SetInteger("stream_id", stream_id);
dict->SetBoolean("has_priority", has_priority);
if (has_priority) {
dict->SetInteger("parent_stream_id", parent_stream_id);
dict->SetInteger("weight", weight);
dict->SetBoolean("exclusive", exclusive);
}
if (source_dependency.IsValid()) {
source_dependency.AddToEventParameters(dict.get());
}
return std::move(dict);
}
std::unique_ptr<base::Value> NetLogSpdyHeadersReceivedCallback(
const spdy::SpdyHeaderBlock* headers,
bool fin,
spdy::SpdyStreamId stream_id,
NetLogCaptureMode capture_mode) {
auto dict = std::make_unique<base::DictionaryValue>();
dict->Set("headers", ElideSpdyHeaderBlockForNetLog(*headers, capture_mode));
dict->SetBoolean("fin", fin);
dict->SetInteger("stream_id", stream_id);
return std::move(dict);
}
std::unique_ptr<base::Value> NetLogSpdySessionCloseCallback(
int net_error,
const std::string* description,
NetLogCaptureMode /* capture_mode */) {
auto dict = std::make_unique<base::DictionaryValue>();
dict->SetInteger("net_error", net_error);
dict->SetString("description", *description);
return std::move(dict);
}
std::unique_ptr<base::Value> NetLogSpdySessionCallback(
const HostPortProxyPair* host_pair,
NetLogCaptureMode /* capture_mode */) {
auto dict = std::make_unique<base::DictionaryValue>();
dict->SetString("host", host_pair->first.ToString());
dict->SetString("proxy", host_pair->second.ToPacString());
return std::move(dict);
}
std::unique_ptr<base::Value> NetLogSpdyInitializedCallback(
NetLogSource source,
NetLogCaptureMode /* capture_mode */) {
auto dict = std::make_unique<base::DictionaryValue>();
if (source.IsValid()) {
source.AddToEventParameters(dict.get());
}
dict->SetString("protocol", NextProtoToString(kProtoHTTP2));
return std::move(dict);
}
std::unique_ptr<base::Value> NetLogSpdySendSettingsCallback(
const spdy::SettingsMap* settings,
NetLogCaptureMode /* capture_mode */) {
auto dict = std::make_unique<base::DictionaryValue>();
auto settings_list = std::make_unique<base::ListValue>();
for (spdy::SettingsMap::const_iterator it = settings->begin();
it != settings->end(); ++it) {
const spdy::SpdySettingsId id = it->first;
const uint32_t value = it->second;
settings_list->AppendString(
base::StringPrintf("[id:%u (%s) value:%u]", id,
spdy::SettingsIdToString(id).c_str(), value));
}
dict->Set("settings", std::move(settings_list));
return std::move(dict);
}
std::unique_ptr<base::Value> NetLogSpdyRecvSettingCallback(
spdy::SpdySettingsId id,
uint32_t value,
NetLogCaptureMode /* capture_mode */) {
auto dict = std::make_unique<base::DictionaryValue>();
dict->SetString(
"id",
base::StringPrintf("%u (%s)", id, spdy::SettingsIdToString(id).c_str()));
dict->SetInteger("value", value);
return std::move(dict);
}
std::unique_ptr<base::Value> NetLogSpdyWindowUpdateFrameCallback(
spdy::SpdyStreamId stream_id,
uint32_t delta,
NetLogCaptureMode /* capture_mode */) {
auto dict = std::make_unique<base::DictionaryValue>();
dict->SetInteger("stream_id", static_cast<int>(stream_id));
dict->SetInteger("delta", delta);
return std::move(dict);
}
std::unique_ptr<base::Value> NetLogSpdySessionWindowUpdateCallback(
int32_t delta,
int32_t window_size,
NetLogCaptureMode /* capture_mode */) {
auto dict = std::make_unique<base::DictionaryValue>();
dict->SetInteger("delta", delta);
dict->SetInteger("window_size", window_size);
return std::move(dict);
}
std::unique_ptr<base::Value> NetLogSpdyDataCallback(
spdy::SpdyStreamId stream_id,
int size,
bool fin,
NetLogCaptureMode /* capture_mode */) {
auto dict = std::make_unique<base::DictionaryValue>();
dict->SetInteger("stream_id", static_cast<int>(stream_id));
dict->SetInteger("size", size);
dict->SetBoolean("fin", fin);
return std::move(dict);
}
std::unique_ptr<base::Value> NetLogSpdyRecvRstStreamCallback(
spdy::SpdyStreamId stream_id,
spdy::SpdyErrorCode error_code,
NetLogCaptureMode /* capture_mode */) {
auto dict = std::make_unique<base::DictionaryValue>();
dict->SetInteger("stream_id", static_cast<int>(stream_id));
dict->SetString(
"error_code",
base::StringPrintf("%u (%s)", error_code, ErrorCodeToString(error_code)));
return std::move(dict);
}
std::unique_ptr<base::Value> NetLogSpdySendRstStreamCallback(
spdy::SpdyStreamId stream_id,
spdy::SpdyErrorCode error_code,
const std::string* description,
NetLogCaptureMode /* capture_mode */) {
auto dict = std::make_unique<base::DictionaryValue>();
dict->SetInteger("stream_id", static_cast<int>(stream_id));
dict->SetString(
"error_code",
base::StringPrintf("%u (%s)", error_code, ErrorCodeToString(error_code)));
dict->SetString("description", *description);
return std::move(dict);
}
std::unique_ptr<base::Value> NetLogSpdyPingCallback(
spdy::SpdyPingId unique_id,
bool is_ack,
const char* type,
NetLogCaptureMode /* capture_mode */) {
auto dict = std::make_unique<base::DictionaryValue>();
dict->SetInteger("unique_id", static_cast<int>(unique_id));
dict->SetString("type", type);
dict->SetBoolean("is_ack", is_ack);
return std::move(dict);
}
std::unique_ptr<base::Value> NetLogSpdyRecvGoAwayCallback(
spdy::SpdyStreamId last_stream_id,
int active_streams,
int unclaimed_streams,
spdy::SpdyErrorCode error_code,
base::StringPiece debug_data,
NetLogCaptureMode capture_mode) {
auto dict = std::make_unique<base::DictionaryValue>();
dict->SetInteger("last_accepted_stream_id", static_cast<int>(last_stream_id));
dict->SetInteger("active_streams", active_streams);
dict->SetInteger("unclaimed_streams", unclaimed_streams);
dict->SetString(
"error_code",
base::StringPrintf("%u (%s)", error_code, ErrorCodeToString(error_code)));
dict->SetString("debug_data",
ElideGoAwayDebugDataForNetLog(capture_mode, debug_data));
return std::move(dict);
}
std::unique_ptr<base::Value> NetLogSpdyPushPromiseReceivedCallback(
const spdy::SpdyHeaderBlock* headers,
spdy::SpdyStreamId stream_id,
spdy::SpdyStreamId promised_stream_id,
NetLogCaptureMode capture_mode) {
auto dict = std::make_unique<base::DictionaryValue>();
dict->Set("headers", ElideSpdyHeaderBlockForNetLog(*headers, capture_mode));
dict->SetInteger("id", stream_id);
dict->SetInteger("promised_stream_id", promised_stream_id);
return std::move(dict);
}
std::unique_ptr<base::Value> NetLogSpdyAdoptedPushStreamCallback(
spdy::SpdyStreamId stream_id,
const GURL* url,
NetLogCaptureMode capture_mode) {
auto dict = std::make_unique<base::DictionaryValue>();
dict->SetInteger("stream_id", stream_id);
dict->SetString("url", url->spec());
return std::move(dict);
}
std::unique_ptr<base::Value> NetLogSpdySessionStalledCallback(
size_t num_active_streams,
size_t num_created_streams,
size_t num_pushed_streams,
size_t max_concurrent_streams,
const std::string& url,
NetLogCaptureMode capture_mode) {
auto dict = std::make_unique<base::DictionaryValue>();
dict->SetInteger("num_active_streams", num_active_streams);
dict->SetInteger("num_created_streams", num_created_streams);
dict->SetInteger("num_pushed_streams", num_pushed_streams);
dict->SetInteger("max_concurrent_streams", max_concurrent_streams);
dict->SetString("url", url);
return std::move(dict);
}
std::unique_ptr<base::Value> NetLogSpdyPriorityCallback(
spdy::SpdyStreamId stream_id,
spdy::SpdyStreamId parent_stream_id,
int weight,
bool exclusive,
NetLogCaptureMode capture_mode) {
auto dict = std::make_unique<base::DictionaryValue>();
dict->SetInteger("stream_id", stream_id);
dict->SetInteger("parent_stream_id", parent_stream_id);
dict->SetInteger("weight", weight);
dict->SetBoolean("exclusive", exclusive);
return std::move(dict);
}
// Helper function to return the total size of an array of objects
// with .size() member functions.
template <typename T, size_t N>
size_t GetTotalSize(const T (&arr)[N]) {
size_t total_size = 0;
for (size_t i = 0; i < N; ++i) {
total_size += arr[i].size();
}
return total_size;
}
// Helper class for std:find_if on STL container containing
// SpdyStreamRequest weak pointers.
class RequestEquals {
public:
explicit RequestEquals(const base::WeakPtr<SpdyStreamRequest>& request)
: request_(request) {}
bool operator()(const base::WeakPtr<SpdyStreamRequest>& request) const {
return request_.get() == request.get();
}
private:
const base::WeakPtr<SpdyStreamRequest> request_;
};
// The maximum number of concurrent streams we will ever create. Even if
// the server permits more, we will never exceed this limit.
const size_t kMaxConcurrentStreamLimit = 256;
class SpdyServerPushHelper : public ServerPushDelegate::ServerPushHelper {
public:
explicit SpdyServerPushHelper(base::WeakPtr<SpdySession> session,
const GURL& url)
: session_(session), request_url_(url) {}
void Cancel() override {
if (session_)
session_->CancelPush(request_url_);
}
const GURL& GetURL() const override { return request_url_; }
private:
base::WeakPtr<SpdySession> session_;
const GURL request_url_;
};
} // namespace
SpdyProtocolErrorDetails MapFramerErrorToProtocolError(
http2::Http2DecoderAdapter::SpdyFramerError err) {
switch (err) {
case http2::Http2DecoderAdapter::SPDY_NO_ERROR:
return SPDY_ERROR_NO_ERROR;
case http2::Http2DecoderAdapter::SPDY_INVALID_STREAM_ID:
return SPDY_ERROR_INVALID_STREAM_ID;
case http2::Http2DecoderAdapter::SPDY_INVALID_CONTROL_FRAME:
return SPDY_ERROR_INVALID_CONTROL_FRAME;
case http2::Http2DecoderAdapter::SPDY_CONTROL_PAYLOAD_TOO_LARGE:
return SPDY_ERROR_CONTROL_PAYLOAD_TOO_LARGE;
case http2::Http2DecoderAdapter::SPDY_ZLIB_INIT_FAILURE:
return SPDY_ERROR_ZLIB_INIT_FAILURE;
case http2::Http2DecoderAdapter::SPDY_UNSUPPORTED_VERSION:
return SPDY_ERROR_UNSUPPORTED_VERSION;
case http2::Http2DecoderAdapter::SPDY_DECOMPRESS_FAILURE:
return SPDY_ERROR_DECOMPRESS_FAILURE;
case http2::Http2DecoderAdapter::SPDY_COMPRESS_FAILURE:
return SPDY_ERROR_COMPRESS_FAILURE;
case http2::Http2DecoderAdapter::SPDY_GOAWAY_FRAME_CORRUPT:
return SPDY_ERROR_GOAWAY_FRAME_CORRUPT;
case http2::Http2DecoderAdapter::SPDY_RST_STREAM_FRAME_CORRUPT:
return SPDY_ERROR_RST_STREAM_FRAME_CORRUPT;
case http2::Http2DecoderAdapter::SPDY_INVALID_PADDING:
return SPDY_ERROR_INVALID_PADDING;
case http2::Http2DecoderAdapter::SPDY_INVALID_DATA_FRAME_FLAGS:
return SPDY_ERROR_INVALID_DATA_FRAME_FLAGS;
case http2::Http2DecoderAdapter::SPDY_INVALID_CONTROL_FRAME_FLAGS:
return SPDY_ERROR_INVALID_CONTROL_FRAME_FLAGS;
case http2::Http2DecoderAdapter::SPDY_UNEXPECTED_FRAME:
return SPDY_ERROR_UNEXPECTED_FRAME;
case http2::Http2DecoderAdapter::SPDY_INTERNAL_FRAMER_ERROR:
return SPDY_ERROR_INTERNAL_FRAMER_ERROR;
case http2::Http2DecoderAdapter::SPDY_INVALID_CONTROL_FRAME_SIZE:
return SPDY_ERROR_INVALID_CONTROL_FRAME_SIZE;
case http2::Http2DecoderAdapter::SPDY_OVERSIZED_PAYLOAD:
return SPDY_ERROR_OVERSIZED_PAYLOAD;
case http2::Http2DecoderAdapter::LAST_ERROR:
NOTREACHED();
}
NOTREACHED();
return static_cast<SpdyProtocolErrorDetails>(-1);
}
Error MapFramerErrorToNetError(
http2::Http2DecoderAdapter::SpdyFramerError err) {
switch (err) {
case http2::Http2DecoderAdapter::SPDY_NO_ERROR:
return OK;
case http2::Http2DecoderAdapter::SPDY_INVALID_CONTROL_FRAME:
return ERR_SPDY_PROTOCOL_ERROR;
case http2::Http2DecoderAdapter::SPDY_CONTROL_PAYLOAD_TOO_LARGE:
return ERR_SPDY_FRAME_SIZE_ERROR;
case http2::Http2DecoderAdapter::SPDY_ZLIB_INIT_FAILURE:
return ERR_SPDY_COMPRESSION_ERROR;
case http2::Http2DecoderAdapter::SPDY_UNSUPPORTED_VERSION:
return ERR_SPDY_PROTOCOL_ERROR;
case http2::Http2DecoderAdapter::SPDY_DECOMPRESS_FAILURE:
return ERR_SPDY_COMPRESSION_ERROR;
case http2::Http2DecoderAdapter::SPDY_COMPRESS_FAILURE:
return ERR_SPDY_COMPRESSION_ERROR;
case http2::Http2DecoderAdapter::SPDY_GOAWAY_FRAME_CORRUPT:
return ERR_SPDY_PROTOCOL_ERROR;
case http2::Http2DecoderAdapter::SPDY_RST_STREAM_FRAME_CORRUPT:
return ERR_SPDY_PROTOCOL_ERROR;
case http2::Http2DecoderAdapter::SPDY_INVALID_PADDING:
return ERR_SPDY_PROTOCOL_ERROR;
case http2::Http2DecoderAdapter::SPDY_INVALID_DATA_FRAME_FLAGS:
return ERR_SPDY_PROTOCOL_ERROR;
case http2::Http2DecoderAdapter::SPDY_INVALID_CONTROL_FRAME_FLAGS:
return ERR_SPDY_PROTOCOL_ERROR;
case http2::Http2DecoderAdapter::SPDY_UNEXPECTED_FRAME:
return ERR_SPDY_PROTOCOL_ERROR;
case http2::Http2DecoderAdapter::SPDY_INTERNAL_FRAMER_ERROR:
return ERR_SPDY_PROTOCOL_ERROR;
case http2::Http2DecoderAdapter::SPDY_INVALID_CONTROL_FRAME_SIZE:
return ERR_SPDY_FRAME_SIZE_ERROR;
case http2::Http2DecoderAdapter::SPDY_INVALID_STREAM_ID:
return ERR_SPDY_PROTOCOL_ERROR;
case http2::Http2DecoderAdapter::SPDY_OVERSIZED_PAYLOAD:
return ERR_SPDY_FRAME_SIZE_ERROR;
case http2::Http2DecoderAdapter::LAST_ERROR:
NOTREACHED();
}
NOTREACHED();
return ERR_SPDY_PROTOCOL_ERROR;
}
SpdyProtocolErrorDetails MapRstStreamStatusToProtocolError(
spdy::SpdyErrorCode error_code) {
switch (error_code) {
case spdy::ERROR_CODE_NO_ERROR:
return STATUS_CODE_NO_ERROR;
case spdy::ERROR_CODE_PROTOCOL_ERROR:
return STATUS_CODE_PROTOCOL_ERROR;
case spdy::ERROR_CODE_INTERNAL_ERROR:
return STATUS_CODE_INTERNAL_ERROR;
case spdy::ERROR_CODE_FLOW_CONTROL_ERROR:
return STATUS_CODE_FLOW_CONTROL_ERROR;
case spdy::ERROR_CODE_SETTINGS_TIMEOUT:
return STATUS_CODE_SETTINGS_TIMEOUT;
case spdy::ERROR_CODE_STREAM_CLOSED:
return STATUS_CODE_STREAM_CLOSED;
case spdy::ERROR_CODE_FRAME_SIZE_ERROR:
return STATUS_CODE_FRAME_SIZE_ERROR;
case spdy::ERROR_CODE_REFUSED_STREAM:
return STATUS_CODE_REFUSED_STREAM;
case spdy::ERROR_CODE_CANCEL:
return STATUS_CODE_CANCEL;
case spdy::ERROR_CODE_COMPRESSION_ERROR:
return STATUS_CODE_COMPRESSION_ERROR;
case spdy::ERROR_CODE_CONNECT_ERROR:
return STATUS_CODE_CONNECT_ERROR;
case spdy::ERROR_CODE_ENHANCE_YOUR_CALM:
return STATUS_CODE_ENHANCE_YOUR_CALM;
case spdy::ERROR_CODE_INADEQUATE_SECURITY:
return STATUS_CODE_INADEQUATE_SECURITY;
case spdy::ERROR_CODE_HTTP_1_1_REQUIRED:
return STATUS_CODE_HTTP_1_1_REQUIRED;
}
NOTREACHED();
return static_cast<SpdyProtocolErrorDetails>(-1);
}
spdy::SpdyErrorCode MapNetErrorToGoAwayStatus(Error err) {
switch (err) {
case OK:
return spdy::ERROR_CODE_NO_ERROR;
case ERR_SPDY_PROTOCOL_ERROR:
return spdy::ERROR_CODE_PROTOCOL_ERROR;
case ERR_SPDY_FLOW_CONTROL_ERROR:
return spdy::ERROR_CODE_FLOW_CONTROL_ERROR;
case ERR_SPDY_FRAME_SIZE_ERROR:
return spdy::ERROR_CODE_FRAME_SIZE_ERROR;
case ERR_SPDY_COMPRESSION_ERROR:
return spdy::ERROR_CODE_COMPRESSION_ERROR;
case ERR_SPDY_INADEQUATE_TRANSPORT_SECURITY:
return spdy::ERROR_CODE_INADEQUATE_SECURITY;
default:
return spdy::ERROR_CODE_PROTOCOL_ERROR;
}
}
SpdyStreamRequest::SpdyStreamRequest() : weak_ptr_factory_(this) {
Reset();
}
SpdyStreamRequest::~SpdyStreamRequest() {
CancelRequest();
}
int SpdyStreamRequest::StartRequest(
SpdyStreamType type,
const base::WeakPtr<SpdySession>& session,
const GURL& url,
RequestPriority priority,
const SocketTag& socket_tag,
const NetLogWithSource& net_log,
CompletionOnceCallback callback,
const NetworkTrafficAnnotationTag& traffic_annotation) {
DCHECK(session);
DCHECK(!session_);
DCHECK(!stream_);
DCHECK(callback_.is_null());
DCHECK(url.is_valid()) << url.possibly_invalid_spec();
type_ = type;
session_ = session;
url_ = SimplifyUrlForRequest(url);
priority_ = priority;
socket_tag_ = socket_tag;
net_log_ = net_log;
callback_ = std::move(callback);
traffic_annotation_ = MutableNetworkTrafficAnnotationTag(traffic_annotation);
base::WeakPtr<SpdyStream> stream;
int rv = session->TryCreateStream(weak_ptr_factory_.GetWeakPtr(), &stream);
if (rv == OK) {
Reset();
stream_ = stream;
}
return rv;
}
void SpdyStreamRequest::CancelRequest() {
if (session_)
session_->CancelStreamRequest(weak_ptr_factory_.GetWeakPtr());
Reset();
// Do this to cancel any pending CompleteStreamRequest() tasks.
weak_ptr_factory_.InvalidateWeakPtrs();
}
base::WeakPtr<SpdyStream> SpdyStreamRequest::ReleaseStream() {
DCHECK(!session_);
base::WeakPtr<SpdyStream> stream = stream_;
DCHECK(stream);
Reset();
return stream;
}
size_t SpdyStreamRequest::EstimateMemoryUsage() const {
return base::trace_event::EstimateItemMemoryUsage(url_);
}
void SpdyStreamRequest::OnRequestCompleteSuccess(
const base::WeakPtr<SpdyStream>& stream) {
DCHECK(session_);
DCHECK(!stream_);
DCHECK(!callback_.is_null());
CompletionOnceCallback callback = std::move(callback_);
Reset();
DCHECK(stream);
stream_ = stream;
std::move(callback).Run(OK);
}
void SpdyStreamRequest::OnRequestCompleteFailure(int rv) {
DCHECK(session_);
DCHECK(!stream_);
DCHECK(!callback_.is_null());
CompletionOnceCallback callback = std::move(callback_);
Reset();
DCHECK_NE(rv, OK);
std::move(callback).Run(rv);
}
void SpdyStreamRequest::Reset() {
type_ = SPDY_BIDIRECTIONAL_STREAM;
session_.reset();
stream_.reset();
url_ = GURL();
priority_ = MINIMUM_PRIORITY;
socket_tag_ = SocketTag();
net_log_ = NetLogWithSource();
callback_.Reset();
traffic_annotation_.reset();
}
// static
bool SpdySession::CanPool(TransportSecurityState* transport_security_state,
const SSLInfo& ssl_info,
const std::string& old_hostname,
const std::string& new_hostname) {
// Pooling is prohibited if the server cert is not valid for the new domain,
// and for connections on which client certs were sent. It is also prohibited
// when channel ID was sent if the hosts are from different eTLDs+1.
if (IsCertStatusError(ssl_info.cert_status))
return false;
if (ssl_info.client_cert_sent)
return false;
if (ssl_info.channel_id_sent &&
ChannelIDService::GetDomainForHost(new_hostname) !=
ChannelIDService::GetDomainForHost(old_hostname)) {
return false;
}
if (!ssl_info.cert->VerifyNameMatch(new_hostname))
return false;
std::string pinning_failure_log;
// DISABLE_PIN_REPORTS is set here because this check can fail in
// normal operation without being indicative of a misconfiguration or
// attack. Port is left at 0 as it is never used.
if (transport_security_state->CheckPublicKeyPins(
HostPortPair(new_hostname, 0), ssl_info.is_issued_by_known_root,
ssl_info.public_key_hashes, ssl_info.unverified_cert.get(),
ssl_info.cert.get(), TransportSecurityState::DISABLE_PIN_REPORTS,
&pinning_failure_log) ==
TransportSecurityState::PKPStatus::VIOLATED) {
return false;
}
// As with CheckPublicKeyPins above, disable Expect-CT reports.
switch (transport_security_state->CheckCTRequirements(
HostPortPair(new_hostname, 0), ssl_info.is_issued_by_known_root,
ssl_info.public_key_hashes, ssl_info.cert.get(),
ssl_info.unverified_cert.get(), ssl_info.signed_certificate_timestamps,
TransportSecurityState::DISABLE_EXPECT_CT_REPORTS,
ssl_info.ct_policy_compliance)) {
case TransportSecurityState::CT_REQUIREMENTS_NOT_MET:
return false;
case TransportSecurityState::CT_REQUIREMENTS_MET:
case TransportSecurityState::CT_NOT_REQUIRED:
// Intentional fallthrough; this case is just here to make sure that all
// possible values of CheckCTRequirements() are handled.
break;
}
return true;
}
SpdySession::SpdySession(
const SpdySessionKey& spdy_session_key,
HttpServerProperties* http_server_properties,
TransportSecurityState* transport_security_state,
const QuicTransportVersionVector& quic_supported_versions,
bool enable_sending_initial_data,
bool enable_ping_based_connection_checking,
bool support_ietf_format_quic_altsvc,
bool is_trusted_proxy,
size_t session_max_recv_window_size,
const spdy::SettingsMap& initial_settings,
TimeFunc time_func,
ServerPushDelegate* push_delegate,
NetLog* net_log)
: in_io_loop_(false),
spdy_session_key_(spdy_session_key),
pool_(NULL),
http_server_properties_(http_server_properties),
transport_security_state_(transport_security_state),
stream_hi_water_mark_(kFirstStreamId),
last_accepted_push_stream_id_(0),
push_delegate_(push_delegate),
num_pushed_streams_(0u),
num_active_pushed_streams_(0u),
bytes_pushed_count_(0u),
bytes_pushed_and_unclaimed_count_(0u),
in_flight_write_frame_type_(spdy::SpdyFrameType::DATA),
in_flight_write_frame_size_(0),
availability_state_(STATE_AVAILABLE),
read_state_(READ_STATE_DO_READ),
write_state_(WRITE_STATE_IDLE),
error_on_close_(OK),
initial_settings_(initial_settings),
max_concurrent_streams_(kInitialMaxConcurrentStreams),
max_concurrent_pushed_streams_(
initial_settings.at(spdy::SETTINGS_MAX_CONCURRENT_STREAMS)),
streams_initiated_count_(0),
streams_pushed_count_(0),
streams_pushed_and_claimed_count_(0),
streams_abandoned_count_(0),
pings_in_flight_(0),
next_ping_id_(1),
last_read_time_(time_func()),
last_compressed_frame_len_(0),
check_ping_status_pending_(false),
session_send_window_size_(0),
session_max_recv_window_size_(session_max_recv_window_size),
session_recv_window_size_(0),
session_unacked_recv_window_bytes_(0),
stream_initial_send_window_size_(kDefaultInitialWindowSize),
max_header_table_size_(
initial_settings.at(spdy::SETTINGS_HEADER_TABLE_SIZE)),
stream_max_recv_window_size_(
initial_settings.at(spdy::SETTINGS_INITIAL_WINDOW_SIZE)),
net_log_(
NetLogWithSource::Make(net_log, NetLogSourceType::HTTP2_SESSION)),
quic_supported_versions_(quic_supported_versions),
enable_sending_initial_data_(enable_sending_initial_data),
enable_ping_based_connection_checking_(
enable_ping_based_connection_checking),
support_ietf_format_quic_altsvc_(support_ietf_format_quic_altsvc),
is_trusted_proxy_(is_trusted_proxy),
support_websocket_(false),
connection_at_risk_of_loss_time_(
base::TimeDelta::FromSeconds(kDefaultConnectionAtRiskOfLossSeconds)),
hung_interval_(base::TimeDelta::FromSeconds(kHungIntervalSeconds)),
time_func_(time_func),
weak_factory_(this) {
net_log_.BeginEvent(
NetLogEventType::HTTP2_SESSION,
base::Bind(&NetLogSpdySessionCallback, &host_port_proxy_pair()));
DCHECK(
base::ContainsKey(initial_settings_, spdy::SETTINGS_HEADER_TABLE_SIZE));
DCHECK(base::ContainsKey(initial_settings_,
spdy::SETTINGS_MAX_CONCURRENT_STREAMS));
DCHECK(
base::ContainsKey(initial_settings_, spdy::SETTINGS_INITIAL_WINDOW_SIZE));
// TODO(mbelshe): consider randomization of the stream_hi_water_mark.
}
SpdySession::~SpdySession() {
CHECK(!in_io_loop_);
DcheckDraining();
// TODO(akalin): Check connection->is_initialized() instead. This
// requires re-working CreateFakeSpdySession(), though.
DCHECK(connection_->socket());
// With SPDY we can't recycle sockets.
connection_->socket()->Disconnect();
RecordHistograms();
net_log_.EndEvent(NetLogEventType::HTTP2_SESSION);
}
int SpdySession::GetPushedStream(const GURL& url,
spdy::SpdyStreamId pushed_stream_id,
RequestPriority priority,
SpdyStream** stream,
const NetLogWithSource& stream_net_log) {
CHECK(!in_io_loop_);
// |pushed_stream_id| must be valid.
DCHECK_NE(pushed_stream_id, kNoPushedStreamFound);
// |pushed_stream_id| must already have been claimed.
DCHECK_NE(pushed_stream_id,
pool_->push_promise_index()->FindStream(url, this));
if (availability_state_ == STATE_DRAINING) {
*stream = nullptr;
return ERR_CONNECTION_CLOSED;
}
ActiveStreamMap::iterator active_it = active_streams_.find(pushed_stream_id);
if (active_it == active_streams_.end()) {
// A previously claimed pushed stream might not be available, for example,
// if the server has reset it in the meanwhile.
return ERR_SPDY_PUSHED_STREAM_NOT_AVAILABLE;
}
net_log_.AddEvent(
NetLogEventType::HTTP2_STREAM_ADOPTED_PUSH_STREAM,
base::Bind(&NetLogSpdyAdoptedPushStreamCallback, pushed_stream_id, &url));
*stream = active_it->second;
DCHECK_LT(streams_pushed_and_claimed_count_, streams_pushed_count_);
streams_pushed_and_claimed_count_++;
// If the stream is still open, update its priority to that of the request.
if (!(*stream)->IsClosed() && (*stream)->priority() != priority) {
(*stream)->SetPriority(priority);
auto updates = priority_dependency_state_.OnStreamUpdate(
(*stream)->stream_id(), ConvertRequestPriorityToSpdyPriority(priority));
for (auto u : updates) {
ActiveStreamMap::iterator it = active_streams_.find(u.id);
DCHECK(it != active_streams_.end());
EnqueuePriorityFrame(u.id, u.parent_stream_id, u.weight, u.exclusive);
}
}
return OK;
}
void SpdySession::CancelPush(const GURL& url) {
const spdy::SpdyStreamId stream_id =
pool_->push_promise_index()->FindStream(url, this);
if (stream_id == kNoPushedStreamFound)
return;
DCHECK(active_streams_.find(stream_id) != active_streams_.end());
ResetStream(stream_id, ERR_ABORTED, "Cancelled push stream.");
}
void SpdySession::InitializeWithSocket(
std::unique_ptr<ClientSocketHandle> connection,
SpdySessionPool* pool) {
CHECK(!in_io_loop_);
DCHECK_EQ(availability_state_, STATE_AVAILABLE);
DCHECK_EQ(read_state_, READ_STATE_DO_READ);
DCHECK_EQ(write_state_, WRITE_STATE_IDLE);
DCHECK(!connection_);
// TODO(akalin): Check connection->is_initialized() instead. This
// requires re-working CreateFakeSpdySession(), though.
DCHECK(connection->socket());
connection_ = std::move(connection);
session_send_window_size_ = kDefaultInitialWindowSize;
session_recv_window_size_ = kDefaultInitialWindowSize;
spdy::SettingsMap::const_iterator it =
initial_settings_.find(spdy::SETTINGS_MAX_HEADER_LIST_SIZE);
uint32_t spdy_max_header_list_size =
(it == initial_settings_.end()) ? kSpdyMaxHeaderListSize : it->second;
buffered_spdy_framer_ =
std::make_unique<BufferedSpdyFramer>(spdy_max_header_list_size, net_log_);
buffered_spdy_framer_->set_visitor(this);
buffered_spdy_framer_->set_debug_visitor(this);
buffered_spdy_framer_->UpdateHeaderDecoderTableSize(max_header_table_size_);
net_log_.AddEvent(NetLogEventType::HTTP2_SESSION_INITIALIZED,
base::Bind(&NetLogSpdyInitializedCallback,
connection_->socket()->NetLog().source()));
DCHECK_EQ(availability_state_, STATE_AVAILABLE);
connection_->AddHigherLayeredPool(this);
if (enable_sending_initial_data_)
SendInitialData();
pool_ = pool;
// Bootstrap the read loop.
base::ThreadTaskRunnerHandle::Get()->PostTask(
FROM_HERE,
base::Bind(&SpdySession::PumpReadLoop, weak_factory_.GetWeakPtr(),
READ_STATE_DO_READ, OK));
}
bool SpdySession::VerifyDomainAuthentication(const std::string& domain) const {
if (availability_state_ == STATE_DRAINING)
return false;
SSLInfo ssl_info;
if (!GetSSLInfo(&ssl_info))
return true; // This is not a secure session, so all domains are okay.
return CanPool(transport_security_state_, ssl_info, host_port_pair().host(),
domain);
}
void SpdySession::EnqueueStreamWrite(
const base::WeakPtr<SpdyStream>& stream,
spdy::SpdyFrameType frame_type,
std::unique_ptr<SpdyBufferProducer> producer) {
DCHECK(frame_type == spdy::SpdyFrameType::HEADERS ||
frame_type == spdy::SpdyFrameType::DATA);
EnqueueWrite(stream->priority(), frame_type, std::move(producer), stream,
stream->traffic_annotation());
}
std::unique_ptr<spdy::SpdySerializedFrame> SpdySession::CreateHeaders(
spdy::SpdyStreamId stream_id,
RequestPriority priority,
spdy::SpdyControlFlags flags,
spdy::SpdyHeaderBlock block,
NetLogSource source_dependency) {
ActiveStreamMap::const_iterator it = active_streams_.find(stream_id);
CHECK(it != active_streams_.end());
CHECK_EQ(it->second->stream_id(), stream_id);
MaybeSendPrefacePing();
DCHECK(buffered_spdy_framer_.get());
spdy::SpdyPriority spdy_priority =
ConvertRequestPriorityToSpdyPriority(priority);
bool has_priority = true;
int weight = 0;
spdy::SpdyStreamId parent_stream_id = 0;
bool exclusive = false;
priority_dependency_state_.OnStreamCreation(
stream_id, spdy_priority, &parent_stream_id, &weight, &exclusive);
if (net_log().IsCapturing()) {
net_log().AddEvent(
NetLogEventType::HTTP2_SESSION_SEND_HEADERS,
base::Bind(&NetLogSpdyHeadersSentCallback, &block,
(flags & spdy::CONTROL_FLAG_FIN) != 0, stream_id,
has_priority, weight, parent_stream_id, exclusive,
source_dependency));
}
spdy::SpdyHeadersIR headers(stream_id, std::move(block));
headers.set_has_priority(has_priority);
headers.set_weight(weight);
headers.set_parent_stream_id(parent_stream_id);
headers.set_exclusive(exclusive);
headers.set_fin((flags & spdy::CONTROL_FLAG_FIN) != 0);
streams_initiated_count_++;
return std::make_unique<spdy::SpdySerializedFrame>(
buffered_spdy_framer_->SerializeFrame(headers));
}
std::unique_ptr<SpdyBuffer> SpdySession::CreateDataBuffer(
spdy::SpdyStreamId stream_id,
IOBuffer* data,
int len,
spdy::SpdyDataFlags flags) {
if (availability_state_ == STATE_DRAINING) {
return std::unique_ptr<SpdyBuffer>();
}
ActiveStreamMap::const_iterator it = active_streams_.find(stream_id);
CHECK(it != active_streams_.end());
SpdyStream* stream = it->second;
CHECK_EQ(stream->stream_id(), stream_id);
if (len < 0) {
NOTREACHED();
return std::unique_ptr<SpdyBuffer>();
}
int effective_len = std::min(len, kMaxSpdyFrameChunkSize);
bool send_stalled_by_stream = (stream->send_window_size() <= 0);
bool send_stalled_by_session = IsSendStalled();
// NOTE: There's an enum of the same name in histograms.xml.
enum SpdyFrameFlowControlState {
SEND_NOT_STALLED,
SEND_STALLED_BY_STREAM,
SEND_STALLED_BY_SESSION,
SEND_STALLED_BY_STREAM_AND_SESSION,
};
SpdyFrameFlowControlState frame_flow_control_state = SEND_NOT_STALLED;
if (send_stalled_by_stream) {
if (send_stalled_by_session) {
frame_flow_control_state = SEND_STALLED_BY_STREAM_AND_SESSION;
} else {
frame_flow_control_state = SEND_STALLED_BY_STREAM;
}
} else if (send_stalled_by_session) {
frame_flow_control_state = SEND_STALLED_BY_SESSION;
}
UMA_HISTOGRAM_ENUMERATION("Net.SpdyFrameStreamAndSessionFlowControlState",
frame_flow_control_state,
SEND_STALLED_BY_STREAM_AND_SESSION + 1);
// Obey send window size of the stream.
if (send_stalled_by_stream) {
stream->set_send_stalled_by_flow_control(true);
// Even though we're currently stalled only by the stream, we
// might end up being stalled by the session also.
QueueSendStalledStream(*stream);
net_log().AddEvent(
NetLogEventType::HTTP2_SESSION_STREAM_STALLED_BY_STREAM_SEND_WINDOW,
NetLog::IntCallback("stream_id", stream_id));
return std::unique_ptr<SpdyBuffer>();
}
effective_len = std::min(effective_len, stream->send_window_size());
// Obey send window size of the session.
if (send_stalled_by_session) {
stream->set_send_stalled_by_flow_control(true);
QueueSendStalledStream(*stream);
net_log().AddEvent(
NetLogEventType::HTTP2_SESSION_STREAM_STALLED_BY_SESSION_SEND_WINDOW,
NetLog::IntCallback("stream_id", stream_id));
return std::unique_ptr<SpdyBuffer>();
}
effective_len = std::min(effective_len, session_send_window_size_);
DCHECK_GE(effective_len, 0);
// Clear FIN flag if only some of the data will be in the data
// frame.
if (effective_len < len)
flags = static_cast<spdy::SpdyDataFlags>(flags & ~spdy::DATA_FLAG_FIN);
if (net_log().IsCapturing()) {
net_log().AddEvent(
NetLogEventType::HTTP2_SESSION_SEND_DATA,
base::Bind(&NetLogSpdyDataCallback, stream_id, effective_len,
(flags & spdy::DATA_FLAG_FIN) != 0));
}
// Send PrefacePing for DATA_FRAMEs with nonzero payload size.
if (effective_len > 0)
MaybeSendPrefacePing();
// TODO(mbelshe): reduce memory copies here.
DCHECK(buffered_spdy_framer_.get());
std::unique_ptr<spdy::SpdySerializedFrame> frame(
buffered_spdy_framer_->CreateDataFrame(
stream_id, data->data(), static_cast<uint32_t>(effective_len),
flags));
auto data_buffer = std::make_unique<SpdyBuffer>(std::move(frame));
// Send window size is based on payload size, so nothing to do if this is
// just a FIN with no payload.
if (effective_len != 0) {
DecreaseSendWindowSize(static_cast<int32_t>(effective_len));
data_buffer->AddConsumeCallback(base::Bind(
&SpdySession::OnWriteBufferConsumed, weak_factory_.GetWeakPtr(),
static_cast<size_t>(effective_len)));
}
return data_buffer;
}
void SpdySession::CloseActiveStream(spdy::SpdyStreamId stream_id, int status) {
DCHECK_NE(stream_id, 0u);
ActiveStreamMap::iterator it = active_streams_.find(stream_id);
if (it == active_streams_.end()) {
NOTREACHED();
return;
}
CloseActiveStreamIterator(it, status);
}
void SpdySession::CloseCreatedStream(const base::WeakPtr<SpdyStream>& stream,
int status) {
DCHECK_EQ(stream->stream_id(), 0u);
CreatedStreamSet::iterator it = created_streams_.find(stream.get());
if (it == created_streams_.end()) {
NOTREACHED();
return;
}
CloseCreatedStreamIterator(it, status);
}
void SpdySession::ResetStream(spdy::SpdyStreamId stream_id,
int error,
const std::string& description) {
DCHECK_NE(stream_id, 0u);
ActiveStreamMap::iterator it = active_streams_.find(stream_id);
if (it == active_streams_.end()) {
NOTREACHED();
return;
}
ResetStreamIterator(it, error, description);
}
bool SpdySession::IsStreamActive(spdy::SpdyStreamId stream_id) const {
return base::ContainsKey(active_streams_, stream_id);
}
LoadState SpdySession::GetLoadState() const {
// Just report that we're idle since the session could be doing
// many things concurrently.
return LOAD_STATE_IDLE;
}
bool SpdySession::GetRemoteEndpoint(IPEndPoint* endpoint) {
return GetPeerAddress(endpoint) == OK;
}
bool SpdySession::GetSSLInfo(SSLInfo* ssl_info) const {
return connection_->socket()->GetSSLInfo(ssl_info);
}
Error SpdySession::GetTokenBindingSignature(crypto::ECPrivateKey* key,
TokenBindingType tb_type,
std::vector<uint8_t>* out) {
return connection_->socket()->GetTokenBindingSignature(key, tb_type, out);
}
bool SpdySession::WasAlpnNegotiated() const {
return connection_->socket()->WasAlpnNegotiated();
}
NextProto SpdySession::GetNegotiatedProtocol() const {
return connection_->socket()->GetNegotiatedProtocol();
}
void SpdySession::SendStreamWindowUpdate(spdy::SpdyStreamId stream_id,
uint32_t delta_window_size) {
ActiveStreamMap::const_iterator it = active_streams_.find(stream_id);
CHECK(it != active_streams_.end());
CHECK_EQ(it->second->stream_id(), stream_id);
SendWindowUpdateFrame(stream_id, delta_window_size, it->second->priority());
}
void SpdySession::CloseSessionOnError(Error err,
const std::string& description) {
DCHECK_LT(err, ERR_IO_PENDING);
DoDrainSession(err, description);
}
void SpdySession::MakeUnavailable() {
if (availability_state_ == STATE_AVAILABLE) {
availability_state_ = STATE_GOING_AWAY;
pool_->MakeSessionUnavailable(GetWeakPtr());
}
}
void SpdySession::StartGoingAway(spdy::SpdyStreamId last_good_stream_id,
Error status) {
DCHECK_GE(availability_state_, STATE_GOING_AWAY);
// The loops below are carefully written to avoid reentrancy problems.
while (true) {
size_t old_size = GetTotalSize(pending_create_stream_queues_);
base::WeakPtr<SpdyStreamRequest> pending_request =
GetNextPendingStreamRequest();
if (!pending_request)
break;
// No new stream requests should be added while the session is
// going away.
DCHECK_GT(old_size, GetTotalSize(pending_create_stream_queues_));
pending_request->OnRequestCompleteFailure(ERR_ABORTED);
}
while (true) {
size_t old_size = active_streams_.size();
ActiveStreamMap::iterator it =
active_streams_.lower_bound(last_good_stream_id + 1);
if (it == active_streams_.end())
break;
LogAbandonedActiveStream(it, status);
CloseActiveStreamIterator(it, status);
// No new streams should be activated while the session is going
// away.
DCHECK_GT(old_size, active_streams_.size());
}
while (!created_streams_.empty()) {
size_t old_size = created_streams_.size();
CreatedStreamSet::iterator it = created_streams_.begin();
LogAbandonedStream(*it, status);
CloseCreatedStreamIterator(it, status);
// No new streams should be created while the session is going
// away.
DCHECK_GT(old_size, created_streams_.size());
}
write_queue_.RemovePendingWritesForStreamsAfter(last_good_stream_id);
DcheckGoingAway();
MaybeFinishGoingAway();
}
void SpdySession::MaybeFinishGoingAway() {
if (active_streams_.empty() && created_streams_.empty() &&
availability_state_ == STATE_GOING_AWAY) {
DoDrainSession(OK, "Finished going away");
}
}
std::unique_ptr<base::Value> SpdySession::GetInfoAsValue() const {
auto dict = std::make_unique<base::DictionaryValue>();
dict->SetInteger("source_id", net_log_.source().id);
dict->SetString("host_port_pair", host_port_pair().ToString());
if (!pooled_aliases_.empty()) {
auto alias_list = std::make_unique<base::ListValue>();
for (const auto& alias : pooled_aliases_) {
alias_list->AppendString(alias.host_port_pair().ToString());
}
dict->Set("aliases", std::move(alias_list));
}
dict->SetString("proxy", host_port_proxy_pair().second.ToURI());
dict->SetInteger("active_streams", active_streams_.size());
dict->SetInteger("unclaimed_pushed_streams",
pool_->push_promise_index()->CountStreamsForSession(this));
dict->SetString(
"negotiated_protocol",
NextProtoToString(connection_->socket()->GetNegotiatedProtocol()));
dict->SetInteger("error", error_on_close_);
dict->SetInteger("max_concurrent_streams", max_concurrent_streams_);
dict->SetInteger("streams_initiated_count", streams_initiated_count_);
dict->SetInteger("streams_pushed_count", streams_pushed_count_);
dict->SetInteger("streams_pushed_and_claimed_count",
streams_pushed_and_claimed_count_);
dict->SetInteger("streams_abandoned_count", streams_abandoned_count_);
DCHECK(buffered_spdy_framer_.get());
dict->SetInteger("frames_received", buffered_spdy_framer_->frames_received());
dict->SetInteger("send_window_size", session_send_window_size_);
dict->SetInteger("recv_window_size", session_recv_window_size_);
dict->SetInteger("unacked_recv_window_bytes",
session_unacked_recv_window_bytes_);
return std::move(dict);
}
bool SpdySession::IsReused() const {
return buffered_spdy_framer_->frames_received() > 0 ||
connection_->reuse_type() == ClientSocketHandle::UNUSED_IDLE;
}
bool SpdySession::GetLoadTimingInfo(spdy::SpdyStreamId stream_id,
LoadTimingInfo* load_timing_info) const {
return connection_->GetLoadTimingInfo(stream_id != kFirstStreamId,
load_timing_info);
}
int SpdySession::GetPeerAddress(IPEndPoint* address) const {
if (connection_->socket())
return connection_->socket()->GetPeerAddress(address);
return ERR_SOCKET_NOT_CONNECTED;
}
int SpdySession::GetLocalAddress(IPEndPoint* address) const {
if (connection_->socket())
return connection_->socket()->GetLocalAddress(address);
return ERR_SOCKET_NOT_CONNECTED;
}
void SpdySession::AddPooledAlias(const SpdySessionKey& alias_key) {
pooled_aliases_.insert(alias_key);
}
void SpdySession::RemovePooledAlias(const SpdySessionKey& alias_key) {
pooled_aliases_.erase(alias_key);
}
bool SpdySession::HasAcceptableTransportSecurity() const {
SSLInfo ssl_info;
CHECK(GetSSLInfo(&ssl_info));
// HTTP/2 requires TLS 1.2+
if (SSLConnectionStatusToVersion(ssl_info.connection_status) <
SSL_CONNECTION_VERSION_TLS1_2) {
return false;
}
if (!IsTLSCipherSuiteAllowedByHTTP2(
SSLConnectionStatusToCipherSuite(ssl_info.connection_status))) {
return false;
}
return true;
}
base::WeakPtr<SpdySession> SpdySession::GetWeakPtr() {
return weak_factory_.GetWeakPtr();
}
bool SpdySession::CloseOneIdleConnection() {
CHECK(!in_io_loop_);
DCHECK(pool_);
if (active_streams_.empty()) {
DoDrainSession(ERR_CONNECTION_CLOSED, "Closing idle connection.");
}
// Return false as the socket wasn't immediately closed.
return false;
}
bool SpdySession::ValidatePushedStream(spdy::SpdyStreamId stream_id,
const GURL& url,
const HttpRequestInfo& request_info,
const SpdySessionKey& key) const {
// Proxy server and privacy mode must match.
if (key.proxy_server() != spdy_session_key_.proxy_server() ||
key.privacy_mode() != spdy_session_key_.privacy_mode()) {
return false;
}
// Certificate must match for encrypted schemes only.
if (url.SchemeIsCryptographic() &&
!VerifyDomainAuthentication(key.host_port_pair().host())) {
return false;
}
ActiveStreamMap::const_iterator stream_it = active_streams_.find(stream_id);
if (stream_it == active_streams_.end()) {
// Only active streams should be in Http2PushPromiseIndex.
NOTREACHED();
return false;
}
const spdy::SpdyHeaderBlock& request_headers =
stream_it->second->request_headers();
spdy::SpdyHeaderBlock::const_iterator method_it =
request_headers.find(spdy::kHttp2MethodHeader);
if (method_it == request_headers.end()) {
// TryCreatePushStream() would have reset the stream if it had no method.
NOTREACHED();
return false;
}
// Request method must match.
if (request_info.method != method_it->second) {
return false;
}
return true;
}
base::WeakPtr<SpdySession> SpdySession::GetWeakPtrToSession() {
return GetWeakPtr();
}
size_t SpdySession::DumpMemoryStats(StreamSocket::SocketMemoryStats* stats,
bool* is_session_active) const {
// TODO(xunjieli): Include |pending_create_stream_queues_| when WeakPtr is
// supported in memory_usage_estimator.h.
*is_session_active = is_active();
connection_->DumpMemoryStats(stats);
// |connection_| is estimated in stats->total_size. |read_buffer_| is
// estimated in |read_buffer_size|. TODO(xunjieli): Make them use EMU().
size_t read_buffer_size = read_buffer_ ? kReadBufferSize : 0;
return stats->total_size + read_buffer_size +
base::trace_event::EstimateMemoryUsage(spdy_session_key_) +
base::trace_event::EstimateMemoryUsage(pooled_aliases_) +
base::trace_event::EstimateMemoryUsage(active_streams_) +
base::trace_event::EstimateMemoryUsage(created_streams_) +
base::trace_event::EstimateMemoryUsage(write_queue_) +
base::trace_event::EstimateMemoryUsage(in_flight_write_) +
base::trace_event::EstimateMemoryUsage(buffered_spdy_framer_) +
base::trace_event::EstimateMemoryUsage(initial_settings_) +
base::trace_event::EstimateMemoryUsage(stream_send_unstall_queue_) +
base::trace_event::EstimateMemoryUsage(priority_dependency_state_);
}
bool SpdySession::ChangeSocketTag(const SocketTag& new_tag) {
if (!IsAvailable() || !connection_->socket())
return false;
// Changing the tag on the underlying socket will affect all streams,
// so only allow changing the tag when there are no active streams.
if (is_active())
return false;
connection_->socket()->ApplySocketTag(new_tag);
SpdySessionKey new_key(spdy_session_key_.host_port_pair(),
spdy_session_key_.proxy_server(),
spdy_session_key_.privacy_mode(), new_tag);
spdy_session_key_ = new_key;
return true;
}
// static
void SpdySession::RecordSpdyPushedStreamFateHistogram(
SpdyPushedStreamFate value) {
UMA_HISTOGRAM_ENUMERATION("Net.SpdyPushedStreamFate", value);
}
// {,Try}CreateStream() can be called with |in_io_loop_| set if a stream is
// being created in response to another being closed due to received data.
int SpdySession::TryCreateStream(
const base::WeakPtr<SpdyStreamRequest>& request,
base::WeakPtr<SpdyStream>* stream) {
DCHECK(request);
if (availability_state_ == STATE_GOING_AWAY)
return ERR_FAILED;
if (availability_state_ == STATE_DRAINING)
return ERR_CONNECTION_CLOSED;
// Fail if ChangeSocketTag() has been called.
if (request->socket_tag_ != spdy_session_key_.socket_tag())
return ERR_FAILED;
if ((active_streams_.size() + created_streams_.size() - num_pushed_streams_ <
max_concurrent_streams_)) {
return CreateStream(*request, stream);
}
if (net_log().IsCapturing()) {
net_log().AddEvent(
NetLogEventType::HTTP2_SESSION_STALLED_MAX_STREAMS,
base::Bind(&NetLogSpdySessionStalledCallback, active_streams_.size(),
created_streams_.size(), num_pushed_streams_,
max_concurrent_streams_, request->url().spec()));
}
RequestPriority priority = request->priority();
CHECK_GE(priority, MINIMUM_PRIORITY);
CHECK_LE(priority, MAXIMUM_PRIORITY);
pending_create_stream_queues_[priority].push_back(request);
return ERR_IO_PENDING;
}
int SpdySession::CreateStream(const SpdyStreamRequest& request,
base::WeakPtr<SpdyStream>* stream) {
DCHECK_GE(request.priority(), MINIMUM_PRIORITY);
DCHECK_LE(request.priority(), MAXIMUM_PRIORITY);
if (availability_state_ == STATE_GOING_AWAY)
return ERR_FAILED;
if (availability_state_ == STATE_DRAINING)
return ERR_CONNECTION_CLOSED;
DCHECK(connection_->socket());
UMA_HISTOGRAM_BOOLEAN("Net.SpdySession.CreateStreamWithSocketConnected",
connection_->socket()->IsConnected());
if (!connection_->socket()->IsConnected()) {
DoDrainSession(
ERR_CONNECTION_CLOSED,
"Tried to create SPDY stream for a closed socket connection.");
return ERR_CONNECTION_CLOSED;
}
auto new_stream = std::make_unique<SpdyStream>(
request.type(), GetWeakPtr(), request.url(), request.priority(),
stream_initial_send_window_size_, stream_max_recv_window_size_,
request.net_log(), request.traffic_annotation());
*stream = new_stream->GetWeakPtr();
InsertCreatedStream(std::move(new_stream));
return OK;
}
void SpdySession::CancelStreamRequest(
const base::WeakPtr<SpdyStreamRequest>& request) {
DCHECK(request);
RequestPriority priority = request->priority();
CHECK_GE(priority, MINIMUM_PRIORITY);
CHECK_LE(priority, MAXIMUM_PRIORITY);
#if DCHECK_IS_ON()
// |request| should not be in a queue not matching its priority.
for (int i = MINIMUM_PRIORITY; i <= MAXIMUM_PRIORITY; ++i) {
if (priority == i)
continue;
PendingStreamRequestQueue* queue = &pending_create_stream_queues_[i];
DCHECK(std::find_if(queue->begin(), queue->end(), RequestEquals(request)) ==
queue->end());
}
#endif
PendingStreamRequestQueue* queue = &pending_create_stream_queues_[priority];
// Remove |request| from |queue| while preserving the order of the
// other elements.
PendingStreamRequestQueue::iterator it =
std::find_if(queue->begin(), queue->end(), RequestEquals(request));
// The request may already be removed if there's a
// CompleteStreamRequest() in flight.
if (it != queue->end()) {
it = queue->erase(it);
// |request| should be in the queue at most once, and if it is
// present, should not be pending completion.
DCHECK(std::find_if(it, queue->end(), RequestEquals(request)) ==
queue->end());
}
}
base::WeakPtr<SpdyStreamRequest> SpdySession::GetNextPendingStreamRequest() {
for (int j = MAXIMUM_PRIORITY; j >= MINIMUM_PRIORITY; --j) {
if (pending_create_stream_queues_[j].empty())
continue;
base::WeakPtr<SpdyStreamRequest> pending_request =
pending_create_stream_queues_[j].front();
DCHECK(pending_request);
pending_create_stream_queues_[j].pop_front();
return pending_request;
}
return base::WeakPtr<SpdyStreamRequest>();
}
void SpdySession::ProcessPendingStreamRequests() {
size_t max_requests_to_process =
max_concurrent_streams_ -
(active_streams_.size() + created_streams_.size());
for (size_t i = 0; i < max_requests_to_process; ++i) {
base::WeakPtr<SpdyStreamRequest> pending_request =
GetNextPendingStreamRequest();
if (!pending_request)
break;
// Note that this post can race with other stream creations, and it's
// possible that the un-stalled stream will be stalled again if it loses.
// TODO(jgraettinger): Provide stronger ordering guarantees.
base::ThreadTaskRunnerHandle::Get()->PostTask(
FROM_HERE, base::Bind(&SpdySession::CompleteStreamRequest,
weak_factory_.GetWeakPtr(), pending_request));
}
}
void SpdySession::TryCreatePushStream(spdy::SpdyStreamId stream_id,
spdy::SpdyStreamId associated_stream_id,
spdy::SpdyHeaderBlock headers) {
if ((stream_id & 0x1) != 0) {
std::string description = base::StringPrintf(
"Received invalid pushed stream id %d (must be even) on stream id %d.",
stream_id, associated_stream_id);
LOG(WARNING) << description;
RecordSpdyPushedStreamFateHistogram(
SpdyPushedStreamFate::kPromisedStreamIdParityError);
CloseSessionOnError(ERR_SPDY_PROTOCOL_ERROR, description);
return;
}
if ((associated_stream_id & 0x1) != 1) {
std::string description = base::StringPrintf(
"Received pushed stream id %d on invalid stream id %d (must be odd).",
stream_id, associated_stream_id);
LOG(WARNING) << description;
RecordSpdyPushedStreamFateHistogram(
SpdyPushedStreamFate::kAssociatedStreamIdParityError);
CloseSessionOnError(ERR_SPDY_PROTOCOL_ERROR, description);
return;
}
if (stream_id <= last_accepted_push_stream_id_) {
std::string description = base::StringPrintf(
"Received pushed stream id %d must be larger than last accepted id %d.",
stream_id, last_accepted_push_stream_id_);
LOG(WARNING) << description;
RecordSpdyPushedStreamFateHistogram(
SpdyPushedStreamFate::kStreamIdOutOfOrder);
CloseSessionOnError(ERR_SPDY_PROTOCOL_ERROR, description);
return;
}
// |last_accepted_push_stream_id_| check above guarantees that this stream has
// not been activated yet.
DCHECK(!IsStreamActive(stream_id));
last_accepted_push_stream_id_ = stream_id;
// Pushed streams are speculative, so they start at an IDLE priority.
const RequestPriority request_priority = IDLE;
if (availability_state_ == STATE_GOING_AWAY) {
RecordSpdyPushedStreamFateHistogram(SpdyPushedStreamFate::kGoingAway);
EnqueueResetStreamFrame(stream_id, request_priority,
spdy::ERROR_CODE_REFUSED_STREAM,
"Push stream request received while going away.");
return;
}
streams_pushed_count_++;
// Verify that the response had a URL for us.
GURL gurl(SpdyUtils::GetPromisedUrlFromHeaders(headers));
if (!gurl.is_valid()) {
RecordSpdyPushedStreamFateHistogram(SpdyPushedStreamFate::kInvalidUrl);
EnqueueResetStreamFrame(stream_id, request_priority,
spdy::ERROR_CODE_REFUSED_STREAM,
"Invalid pushed request headers.");
return;
}
// GetPromisedUrlFromHeaders() guarantees that the scheme is http or https.
DCHECK(gurl.SchemeIs(url::kHttpScheme) || gurl.SchemeIs(url::kHttpsScheme));
// "Promised requests MUST be cacheable and MUST be safe [...]" (RFC7540
// Section 8.2). Only cacheable safe request methods are GET and HEAD.
// GetPromisedUrlFromHeaders() guarantees that the method is GET or HEAD.
spdy::SpdyHeaderBlock::const_iterator it =
headers.find(spdy::kHttp2MethodHeader);
DCHECK(it != headers.end() && (it->second == "GET" || it->second == "HEAD"));
// Verify we have a valid stream association.
ActiveStreamMap::iterator associated_it =
active_streams_.find(associated_stream_id);
if (associated_it == active_streams_.end()) {
RecordSpdyPushedStreamFateHistogram(
SpdyPushedStreamFate::kInactiveAssociatedStream);
EnqueueResetStreamFrame(stream_id, request_priority,
spdy::ERROR_CODE_STREAM_CLOSED,
"Inactive associated stream.");
return;
}
// Cross-origin push validation.
GURL associated_url(associated_it->second->url());
if (associated_url.GetOrigin() != gurl.GetOrigin()) {
if (is_trusted_proxy_) {
if (!gurl.SchemeIs(url::kHttpScheme)) {
RecordSpdyPushedStreamFateHistogram(
SpdyPushedStreamFate::kNonHttpSchemeFromTrustedProxy);
EnqueueResetStreamFrame(
stream_id, request_priority, spdy::ERROR_CODE_REFUSED_STREAM,
"Only http scheme allowed for cross origin push by trusted proxy.");
return;
}
} else {
if (!gurl.SchemeIs(url::kHttpsScheme)) {
RecordSpdyPushedStreamFateHistogram(
SpdyPushedStreamFate::kNonHttpsPushedScheme);
EnqueueResetStreamFrame(stream_id, request_priority,
spdy::ERROR_CODE_REFUSED_STREAM,
"Pushed URL must have https scheme.");
return;
}
if (!associated_url.SchemeIs(url::kHttpsScheme)) {
RecordSpdyPushedStreamFateHistogram(
SpdyPushedStreamFate::kNonHttpsAssociatedScheme);
EnqueueResetStreamFrame(stream_id, request_priority,
spdy::ERROR_CODE_REFUSED_STREAM,
"Associated URL must have https scheme.");
return;
}
SSLInfo ssl_info;
CHECK(GetSSLInfo(&ssl_info));
if (!CanPool(transport_security_state_, ssl_info, associated_url.host(),
gurl.host())) {
RecordSpdyPushedStreamFateHistogram(
SpdyPushedStreamFate::kCertificateMismatch);
EnqueueResetStreamFrame(stream_id, request_priority,
spdy::ERROR_CODE_REFUSED_STREAM,
"Certificate does not match pushed URL.");
return;
}
}
}
// Insertion fails if there already is a pushed stream with the same path.
if (!pool_->push_promise_index()->RegisterUnclaimedPushedStream(
gurl, stream_id, this)) {
RecordSpdyPushedStreamFateHistogram(SpdyPushedStreamFate::kDuplicateUrl);
EnqueueResetStreamFrame(stream_id, request_priority,
spdy::ERROR_CODE_REFUSED_STREAM,
"Duplicate pushed stream with url: " + gurl.spec());
return;
}
base::ThreadTaskRunnerHandle::Get()->PostDelayedTask(
FROM_HERE,
base::Bind(&SpdySession::CancelPushedStreamIfUnclaimed, GetWeakPtr(),
stream_id),
base::TimeDelta::FromSeconds(kPushedStreamLifetimeSeconds));
net::NetworkTrafficAnnotationTag traffic_annotation =
net::DefineNetworkTrafficAnnotation("spdy_push_stream", R"(
semantics {
sender: "Spdy Session"
description:
"When a web server needs to push a response to a client, an "
"incoming stream is created to reply the client with pushed "
"message instead of a message from the network."
trigger:
"A request by a server to push a response to the client."
data: "None."
destination: OTHER
destination_other:
"This stream is not used for sending data."
}
policy {
cookies_allowed: NO
setting: "This feature cannot be disabled."
policy_exception_justification: "Essential for navigation."
}
)");
auto stream = std::make_unique<SpdyStream>(
SPDY_PUSH_STREAM, GetWeakPtr(), gurl, request_priority,
stream_initial_send_window_size_, stream_max_recv_window_size_, net_log_,
traffic_annotation);
stream->set_stream_id(stream_id);
// Convert RequestPriority to a spdy::SpdyPriority to send in a PRIORITY
// frame.
spdy::SpdyPriority spdy_priority =
ConvertRequestPriorityToSpdyPriority(request_priority);
spdy::SpdyStreamId dependency_id = 0;
int weight = 0;
bool exclusive = false;
priority_dependency_state_.OnStreamCreation(
stream_id, spdy_priority, &dependency_id, &weight, &exclusive);
EnqueuePriorityFrame(stream_id, dependency_id, weight, exclusive);
// PUSH_PROMISE arrives on associated stream.
associated_it->second->AddRawReceivedBytes(last_compressed_frame_len_);
last_compressed_frame_len_ = 0;
InsertActivatedStream(std::move(stream));
ActiveStreamMap::iterator active_it = active_streams_.find(stream_id);
DCHECK(active_it != active_streams_.end());
// Notify the push_delegate that a push promise has been received.
if (push_delegate_) {
push_delegate_->OnPush(std::make_unique<SpdyServerPushHelper>(
weak_factory_.GetWeakPtr(), gurl),
net_log_);
}
active_it->second->OnPushPromiseHeadersReceived(std::move(headers),
std::move(gurl));
DCHECK(active_it->second->IsReservedRemote());
num_pushed_streams_++;
return;
}
void SpdySession::CloseActiveStreamIterator(ActiveStreamMap::iterator it,
int status) {
// TODO(mbelshe): We should send a RST_STREAM control frame here
// so that the server can cancel a large send.
std::unique_ptr<SpdyStream> owned_stream(it->second);
active_streams_.erase(it);
priority_dependency_state_.OnStreamDestruction(owned_stream->stream_id());
// TODO(akalin): When SpdyStream was ref-counted (and
// |unclaimed_pushed_streams_| held scoped_refptr<SpdyStream>), this
// was only done when status was not OK. This meant that pushed
// streams can still be claimed after they're closed. This is
// probably something that we still want to support, although server
// push is hardly used. Write tests for this and fix this. (See
// http://crbug.com/261712 .)
if (owned_stream->type() == SPDY_PUSH_STREAM) {
if (pool_->push_promise_index()->UnregisterUnclaimedPushedStream(
owned_stream->url(), owned_stream->stream_id(), this)) {
bytes_pushed_and_unclaimed_count_ += owned_stream->recv_bytes();
}
bytes_pushed_count_ += owned_stream->recv_bytes();
num_pushed_streams_--;
if (!owned_stream->IsReservedRemote())
num_active_pushed_streams_--;
}
DeleteStream(std::move(owned_stream), status);
// If there are no active streams and the socket pool is stalled, close the
// session to free up a socket slot.
if (active_streams_.empty() && created_streams_.empty() &&
connection_->IsPoolStalled()) {
DoDrainSession(ERR_CONNECTION_CLOSED, "Closing idle connection.");
}
}
void SpdySession::CloseCreatedStreamIterator(CreatedStreamSet::iterator it,
int status) {
std::unique_ptr<SpdyStream> owned_stream(*it);
created_streams_.erase(it);
DeleteStream(std::move(owned_stream), status);
}
void SpdySession::ResetStreamIterator(ActiveStreamMap::iterator it,
int error,
const std::string& description) {
// Send the RST_STREAM frame first as CloseActiveStreamIterator()
// may close us.
spdy::SpdyErrorCode error_code = spdy::ERROR_CODE_PROTOCOL_ERROR;
if (error == ERR_FAILED) {
error_code = spdy::ERROR_CODE_INTERNAL_ERROR;
} else if (error == ERR_ABORTED ||
error == ERR_SPDY_PUSHED_RESPONSE_DOES_NOT_MATCH) {
error_code = spdy::ERROR_CODE_CANCEL;
} else if (error == ERR_SPDY_FLOW_CONTROL_ERROR) {
error_code = spdy::ERROR_CODE_FLOW_CONTROL_ERROR;
} else if (error == ERR_TIMED_OUT ||
error == ERR_SPDY_CLIENT_REFUSED_STREAM) {
error_code = spdy::ERROR_CODE_REFUSED_STREAM;
} else if (error == ERR_SPDY_STREAM_CLOSED) {
error_code = spdy::ERROR_CODE_STREAM_CLOSED;
}
spdy::SpdyStreamId stream_id = it->first;
RequestPriority priority = it->second->priority();
EnqueueResetStreamFrame(stream_id, priority, error_code, description);
// Removes any pending writes for the stream except for possibly an
// in-flight one.
CloseActiveStreamIterator(it, error);
}
void SpdySession::EnqueueResetStreamFrame(spdy::SpdyStreamId stream_id,
RequestPriority priority,
spdy::SpdyErrorCode error_code,
const std::string& description) {
DCHECK_NE(stream_id, 0u);
net_log().AddEvent(NetLogEventType::HTTP2_SESSION_SEND_RST_STREAM,
base::Bind(&NetLogSpdySendRstStreamCallback, stream_id,
error_code, &description));
DCHECK(buffered_spdy_framer_.get());
std::unique_ptr<spdy::SpdySerializedFrame> rst_frame(
buffered_spdy_framer_->CreateRstStream(stream_id, error_code));
EnqueueSessionWrite(priority, spdy::SpdyFrameType::RST_STREAM,
std::move(rst_frame));
RecordProtocolErrorHistogram(MapRstStreamStatusToProtocolError(error_code));
}
void SpdySession::EnqueuePriorityFrame(spdy::SpdyStreamId stream_id,
spdy::SpdyStreamId dependency_id,
int weight,
bool exclusive) {
net_log().AddEvent(NetLogEventType::HTTP2_STREAM_SEND_PRIORITY,
base::Bind(&NetLogSpdyPriorityCallback, stream_id,
dependency_id, weight, exclusive));
DCHECK(buffered_spdy_framer_.get());
std::unique_ptr<spdy::SpdySerializedFrame> frame(
buffered_spdy_framer_->CreatePriority(stream_id, dependency_id, weight,
exclusive));
// PRIORITY frames describe sequenced updates to the tree, so they must
// be serialized. We do this by queueing all PRIORITY frames at HIGHEST
// priority.
EnqueueWrite(HIGHEST, spdy::SpdyFrameType::PRIORITY,
std::make_unique<SimpleBufferProducer>(
std::make_unique<SpdyBuffer>(std::move(frame))),
base::WeakPtr<SpdyStream>(),
kSpdySessionCommandsTrafficAnnotation);
}
void SpdySession::PumpReadLoop(ReadState expected_read_state, int result) {
CHECK(!in_io_loop_);
if (availability_state_ == STATE_DRAINING) {
return;
}
ignore_result(DoReadLoop(expected_read_state, result));
}
int SpdySession::DoReadLoop(ReadState expected_read_state, int result) {
CHECK(!in_io_loop_);
CHECK_EQ(read_state_, expected_read_state);
in_io_loop_ = true;
int bytes_read_without_yielding = 0;
const base::TimeTicks yield_after_time =
time_func_() +
base::TimeDelta::FromMilliseconds(kYieldAfterDurationMilliseconds);
// Loop until the session is draining, the read becomes blocked, or
// the read limit is exceeded.
while (true) {
switch (read_state_) {
case READ_STATE_DO_READ:
CHECK_EQ(result, OK);
result = DoRead();
break;
case READ_STATE_DO_READ_COMPLETE:
if (result > 0)
bytes_read_without_yielding += result;
result = DoReadComplete(result);
break;
default:
NOTREACHED() << "read_state_: " << read_state_;
break;
}
if (availability_state_ == STATE_DRAINING)
break;
if (result == ERR_IO_PENDING)
break;
if (read_state_ == READ_STATE_DO_READ &&
(bytes_read_without_yielding > kYieldAfterBytesRead ||
time_func_() > yield_after_time)) {
base::ThreadTaskRunnerHandle::Get()->PostTask(
FROM_HERE,
base::Bind(&SpdySession::PumpReadLoop, weak_factory_.GetWeakPtr(),
READ_STATE_DO_READ, OK));
result = ERR_IO_PENDING;
break;
}
}
CHECK(in_io_loop_);
in_io_loop_ = false;
return result;
}
int SpdySession::DoRead() {
DCHECK(!read_buffer_);
CHECK(in_io_loop_);
CHECK(connection_);
CHECK(connection_->socket());
read_state_ = READ_STATE_DO_READ_COMPLETE;
int rv = ERR_READ_IF_READY_NOT_IMPLEMENTED;
read_buffer_ = new IOBuffer(kReadBufferSize);
if (base::FeatureList::IsEnabled(Socket::kReadIfReadyExperiment)) {
rv = connection_->socket()->ReadIfReady(
read_buffer_.get(), kReadBufferSize,
base::Bind(&SpdySession::PumpReadLoop, weak_factory_.GetWeakPtr(),
READ_STATE_DO_READ));
if (rv == ERR_IO_PENDING) {
read_buffer_ = nullptr;
read_state_ = READ_STATE_DO_READ;
return rv;
}
}
if (rv == ERR_READ_IF_READY_NOT_IMPLEMENTED) {
// Fallback to regular Read().
return connection_->socket()->Read(
read_buffer_.get(), kReadBufferSize,
base::Bind(&SpdySession::PumpReadLoop, weak_factory_.GetWeakPtr(),
READ_STATE_DO_READ_COMPLETE));
}
return rv;
}
int SpdySession::DoReadComplete(int result) {
DCHECK(read_buffer_);
CHECK(in_io_loop_);
// Parse a frame. For now this code requires that the frame fit into our
// buffer (kReadBufferSize).
// TODO(mbelshe): support arbitrarily large frames!
if (result == 0) {
DoDrainSession(ERR_CONNECTION_CLOSED, "Connection closed");
return ERR_CONNECTION_CLOSED;
}
if (result < 0) {
DoDrainSession(
static_cast<Error>(result),
base::StringPrintf("Error %d reading from socket.", -result));
return result;
}
CHECK_LE(result, kReadBufferSize);
last_read_time_ = time_func_();
DCHECK(buffered_spdy_framer_.get());
char* data = read_buffer_->data();
while (result > 0) {
uint32_t bytes_processed =
buffered_spdy_framer_->ProcessInput(data, result);
result -= bytes_processed;
data += bytes_processed;
if (availability_state_ == STATE_DRAINING) {
return ERR_CONNECTION_CLOSED;
}
DCHECK_EQ(buffered_spdy_framer_->spdy_framer_error(),
http2::Http2DecoderAdapter::SPDY_NO_ERROR);
}
read_buffer_ = nullptr;
read_state_ = READ_STATE_DO_READ;
return OK;
}
void SpdySession::PumpWriteLoop(WriteState expected_write_state, int result) {
CHECK(!in_io_loop_);
DCHECK_EQ(write_state_, expected_write_state);
DoWriteLoop(expected_write_state, result);
if (availability_state_ == STATE_DRAINING && !in_flight_write_ &&
write_queue_.IsEmpty()) {
pool_->RemoveUnavailableSession(GetWeakPtr()); // Destroys |this|.
return;
}
}
void SpdySession::MaybePostWriteLoop() {
if (write_state_ == WRITE_STATE_IDLE) {
CHECK(!in_flight_write_);
write_state_ = WRITE_STATE_DO_WRITE;
base::ThreadTaskRunnerHandle::Get()->PostTask(
FROM_HERE,
base::Bind(&SpdySession::PumpWriteLoop, weak_factory_.GetWeakPtr(),
WRITE_STATE_DO_WRITE, OK));
}
}
int SpdySession::DoWriteLoop(WriteState expected_write_state, int result) {
CHECK(!in_io_loop_);
DCHECK_NE(write_state_, WRITE_STATE_IDLE);
DCHECK_EQ(write_state_, expected_write_state);
in_io_loop_ = true;
// Loop until the session is closed or the write becomes blocked.
while (true) {
switch (write_state_) {
case WRITE_STATE_DO_WRITE:
DCHECK_EQ(result, OK);
result = DoWrite();
break;
case WRITE_STATE_DO_WRITE_COMPLETE:
result = DoWriteComplete(result);
break;
case WRITE_STATE_IDLE:
default:
NOTREACHED() << "write_state_: " << write_state_;
break;
}
if (write_state_ == WRITE_STATE_IDLE) {
DCHECK_EQ(result, ERR_IO_PENDING);
break;
}
if (result == ERR_IO_PENDING)
break;
}
CHECK(in_io_loop_);
in_io_loop_ = false;
return result;
}
int SpdySession::DoWrite() {
CHECK(in_io_loop_);
DCHECK(buffered_spdy_framer_);
if (in_flight_write_) {
DCHECK_GT(in_flight_write_->GetRemainingSize(), 0u);
} else {
// Grab the next frame to send.
spdy::SpdyFrameType frame_type = spdy::SpdyFrameType::DATA;
std::unique_ptr<SpdyBufferProducer> producer;
base::WeakPtr<SpdyStream> stream;
if (!write_queue_.Dequeue(&frame_type, &producer, &stream,
&in_flight_write_traffic_annotation)) {
write_state_ = WRITE_STATE_IDLE;
return ERR_IO_PENDING;
}
if (stream.get())
CHECK(!stream->IsClosed());
// Activate the stream only when sending the HEADERS frame to
// guarantee monotonically-increasing stream IDs.
if (frame_type == spdy::SpdyFrameType::HEADERS) {
CHECK(stream.get());
CHECK_EQ(stream->stream_id(), 0u);
std::unique_ptr<SpdyStream> owned_stream =
ActivateCreatedStream(stream.get());
InsertActivatedStream(std::move(owned_stream));
if (stream_hi_water_mark_ > kLastStreamId) {
CHECK_EQ(stream->stream_id(), kLastStreamId);
// We've exhausted the stream ID space, and no new streams may be
// created after this one.
MakeUnavailable();
StartGoingAway(kLastStreamId, ERR_ABORTED);
}
}
in_flight_write_ = producer->ProduceBuffer();
if (!in_flight_write_) {
NOTREACHED();
return ERR_UNEXPECTED;
}
in_flight_write_frame_type_ = frame_type;
in_flight_write_frame_size_ = in_flight_write_->GetRemainingSize();
DCHECK_GE(in_flight_write_frame_size_, spdy::kFrameMinimumSize);
in_flight_write_stream_ = stream;
}
write_state_ = WRITE_STATE_DO_WRITE_COMPLETE;
// Explicitly store in a scoped_refptr<IOBuffer> to avoid problems
// with Socket implementations that don't store their IOBuffer
// argument in a scoped_refptr<IOBuffer> (see crbug.com/232345).
scoped_refptr<IOBuffer> write_io_buffer =
in_flight_write_->GetIOBufferForRemainingData();
return connection_->socket()->Write(
write_io_buffer.get(), in_flight_write_->GetRemainingSize(),
base::Bind(&SpdySession::PumpWriteLoop, weak_factory_.GetWeakPtr(),
WRITE_STATE_DO_WRITE_COMPLETE),
NetworkTrafficAnnotationTag(in_flight_write_traffic_annotation));
}
int SpdySession::DoWriteComplete(int result) {
CHECK(in_io_loop_);
DCHECK_NE(result, ERR_IO_PENDING);
DCHECK_GT(in_flight_write_->GetRemainingSize(), 0u);
if (result < 0) {
DCHECK_NE(result, ERR_IO_PENDING);
in_flight_write_.reset();
in_flight_write_frame_type_ = spdy::SpdyFrameType::DATA;
in_flight_write_frame_size_ = 0;
in_flight_write_stream_.reset();
in_flight_write_traffic_annotation.reset();
write_state_ = WRITE_STATE_DO_WRITE;
DoDrainSession(static_cast<Error>(result), "Write error");
return OK;
}
// It should not be possible to have written more bytes than our
// in_flight_write_.
DCHECK_LE(static_cast<size_t>(result), in_flight_write_->GetRemainingSize());
if (result > 0) {
in_flight_write_->Consume(static_cast<size_t>(result));
if (in_flight_write_stream_.get())
in_flight_write_stream_->AddRawSentBytes(static_cast<size_t>(result));
// We only notify the stream when we've fully written the pending frame.
if (in_flight_write_->GetRemainingSize() == 0) {
// It is possible that the stream was cancelled while we were
// writing to the socket.
if (in_flight_write_stream_.get()) {
DCHECK_GT(in_flight_write_frame_size_, 0u);
in_flight_write_stream_->OnFrameWriteComplete(
in_flight_write_frame_type_, in_flight_write_frame_size_);
}
// Cleanup the write which just completed.
in_flight_write_.reset();
in_flight_write_frame_type_ = spdy::SpdyFrameType::DATA;
in_flight_write_frame_size_ = 0;
in_flight_write_stream_.reset();
}
}
write_state_ = WRITE_STATE_DO_WRITE;
return OK;
}
void SpdySession::SendInitialData() {
DCHECK(enable_sending_initial_data_);
DCHECK(buffered_spdy_framer_.get());
// Prepare initial SETTINGS frame. Only send settings that have a value
// different from the protocol default value.
spdy::SettingsMap settings_map;
for (auto setting : initial_settings_) {
if (!IsSpdySettingAtDefaultInitialValue(setting.first, setting.second)) {
settings_map.insert(setting);
}
}
net_log_.AddEvent(NetLogEventType::HTTP2_SESSION_SEND_SETTINGS,
base::Bind(&NetLogSpdySendSettingsCallback, &settings_map));
std::unique_ptr<spdy::SpdySerializedFrame> settings_frame(
buffered_spdy_framer_->CreateSettings(settings_map));
// Prepare initial WINDOW_UPDATE frame.
// Make sure |session_max_recv_window_size_ - session_recv_window_size_|
// does not underflow.
DCHECK_GE(session_max_recv_window_size_, session_recv_window_size_);
DCHECK_GE(session_recv_window_size_, 0);
DCHECK_EQ(0, session_unacked_recv_window_bytes_);
std::unique_ptr<spdy::SpdySerializedFrame> window_update_frame;
const bool send_window_update =
session_max_recv_window_size_ > session_recv_window_size_;
if (send_window_update) {
const int32_t delta_window_size =
session_max_recv_window_size_ - session_recv_window_size_;
session_recv_window_size_ += delta_window_size;
net_log_.AddEvent(NetLogEventType::HTTP2_SESSION_UPDATE_RECV_WINDOW,
base::Bind(&NetLogSpdySessionWindowUpdateCallback,
delta_window_size, session_recv_window_size_));
session_unacked_recv_window_bytes_ += delta_window_size;
net_log_.AddEvent(NetLogEventType::HTTP2_SESSION_SEND_WINDOW_UPDATE,
base::Bind(&NetLogSpdyWindowUpdateFrameCallback,
spdy::kSessionFlowControlStreamId,
session_unacked_recv_window_bytes_));
window_update_frame = buffered_spdy_framer_->CreateWindowUpdate(
spdy::kSessionFlowControlStreamId, session_unacked_recv_window_bytes_);
session_unacked_recv_window_bytes_ = 0;
}
// Create a single frame to hold connection prefix, initial SETTINGS frame,
// and optional initial WINDOW_UPDATE frame, so that they are sent on the wire
// in a single packet.
size_t initial_frame_size =
spdy::kHttp2ConnectionHeaderPrefixSize + settings_frame->size();
if (send_window_update)
initial_frame_size += window_update_frame->size();
auto initial_frame_data = std::make_unique<char[]>(initial_frame_size);
size_t offset = 0;
memcpy(initial_frame_data.get() + offset, spdy::kHttp2ConnectionHeaderPrefix,
spdy::kHttp2ConnectionHeaderPrefixSize);
offset += spdy::kHttp2ConnectionHeaderPrefixSize;
memcpy(initial_frame_data.get() + offset, settings_frame->data(),
settings_frame->size());
offset += settings_frame->size();
if (send_window_update) {
memcpy(initial_frame_data.get() + offset, window_update_frame->data(),
window_update_frame->size());
}
auto initial_frame = std::make_unique<spdy::SpdySerializedFrame>(
initial_frame_data.release(), initial_frame_size,
/* owns_buffer = */ true);
EnqueueSessionWrite(HIGHEST, spdy::SpdyFrameType::SETTINGS,
std::move(initial_frame));
}
void SpdySession::HandleSetting(uint32_t id, uint32_t value) {
switch (id) {
case spdy::SETTINGS_MAX_CONCURRENT_STREAMS:
max_concurrent_streams_ =
std::min(static_cast<size_t>(value), kMaxConcurrentStreamLimit);
ProcessPendingStreamRequests();
break;
case spdy::SETTINGS_INITIAL_WINDOW_SIZE: {
if (value > static_cast<uint32_t>(std::numeric_limits<int32_t>::max())) {
net_log().AddEvent(
NetLogEventType::HTTP2_SESSION_INITIAL_WINDOW_SIZE_OUT_OF_RANGE,
NetLog::IntCallback("initial_window_size", value));
return;
}
// spdy::SETTINGS_INITIAL_WINDOW_SIZE updates initial_send_window_size_
// only.
int32_t delta_window_size =
static_cast<int32_t>(value) - stream_initial_send_window_size_;
stream_initial_send_window_size_ = static_cast<int32_t>(value);
UpdateStreamsSendWindowSize(delta_window_size);
net_log().AddEvent(
NetLogEventType::HTTP2_SESSION_UPDATE_STREAMS_SEND_WINDOW_SIZE,
NetLog::IntCallback("delta_window_size", delta_window_size));
break;
}
case spdy::SETTINGS_ENABLE_CONNECT_PROTOCOL:
if ((value != 0 && value != 1) || (support_websocket_ && value == 0)) {
DoDrainSession(
ERR_SPDY_PROTOCOL_ERROR,
"Invalid value for spdy::SETTINGS_ENABLE_CONNECT_PROTOCOL.");
return;
}
if (value == 1) {
support_websocket_ = true;
}
break;
}
}
void SpdySession::UpdateStreamsSendWindowSize(int32_t delta_window_size) {
for (const auto& value : active_streams_) {
if (!value.second->AdjustSendWindowSize(delta_window_size)) {
DoDrainSession(
ERR_SPDY_FLOW_CONTROL_ERROR,
base::StringPrintf(
"New spdy::SETTINGS_INITIAL_WINDOW_SIZE value overflows "
"flow control window of stream %d.",
value.second->stream_id()));
return;
}
}
for (auto* const stream : created_streams_) {
if (!stream->AdjustSendWindowSize(delta_window_size)) {
DoDrainSession(
ERR_SPDY_FLOW_CONTROL_ERROR,
base::StringPrintf(
"New spdy::SETTINGS_INITIAL_WINDOW_SIZE value overflows "
"flow control window of stream %d.",
stream->stream_id()));
return;
}
}
}
void SpdySession::MaybeSendPrefacePing() {
if (pings_in_flight_ > 0 || check_ping_status_pending_ ||
!enable_ping_based_connection_checking_) {
return;
}
// If there has been no read activity in the session for some time,
// then send a preface-PING.
if (time_func_() > last_read_time_ + connection_at_risk_of_loss_time_)
WritePingFrame(next_ping_id_, false);
}
void SpdySession::SendWindowUpdateFrame(spdy::SpdyStreamId stream_id,
uint32_t delta_window_size,
RequestPriority priority) {
ActiveStreamMap::const_iterator it = active_streams_.find(stream_id);
if (it != active_streams_.end()) {
CHECK_EQ(it->second->stream_id(), stream_id);
} else {
CHECK_EQ(stream_id, spdy::kSessionFlowControlStreamId);
}
net_log_.AddEvent(NetLogEventType::HTTP2_SESSION_SEND_WINDOW_UPDATE,
base::Bind(&NetLogSpdyWindowUpdateFrameCallback, stream_id,
delta_window_size));
DCHECK(buffered_spdy_framer_.get());
std::unique_ptr<spdy::SpdySerializedFrame> window_update_frame(
buffered_spdy_framer_->CreateWindowUpdate(stream_id, delta_window_size));
EnqueueSessionWrite(priority, spdy::SpdyFrameType::WINDOW_UPDATE,
std::move(window_update_frame));
}
void SpdySession::WritePingFrame(spdy::SpdyPingId unique_id, bool is_ack) {
DCHECK(buffered_spdy_framer_.get());
std::unique_ptr<spdy::SpdySerializedFrame> ping_frame(
buffered_spdy_framer_->CreatePingFrame(unique_id, is_ack));
EnqueueSessionWrite(HIGHEST, spdy::SpdyFrameType::PING,
std::move(ping_frame));
if (net_log().IsCapturing()) {
net_log().AddEvent(
NetLogEventType::HTTP2_SESSION_PING,
base::Bind(&NetLogSpdyPingCallback, unique_id, is_ack, "sent"));
}
if (!is_ack) {
++next_ping_id_;
++pings_in_flight_;
PlanToCheckPingStatus();
last_ping_sent_time_ = time_func_();
}
}
void SpdySession::PlanToCheckPingStatus() {
if (check_ping_status_pending_)
return;
check_ping_status_pending_ = true;
base::ThreadTaskRunnerHandle::Get()->PostDelayedTask(
FROM_HERE, base::Bind(&SpdySession::CheckPingStatus,
weak_factory_.GetWeakPtr(), time_func_()),
hung_interval_);
}
void SpdySession::CheckPingStatus(base::TimeTicks last_check_time) {
CHECK(!in_io_loop_);
DCHECK(check_ping_status_pending_);
// Check if we got a response back for all PINGs we had sent.
if (pings_in_flight_ == 0) {
check_ping_status_pending_ = false;
return;
}
const base::TimeTicks now = time_func_();
if (now > last_read_time_ + hung_interval_ ||
last_read_time_ < last_check_time) {
check_ping_status_pending_ = false;
DoDrainSession(ERR_SPDY_PING_FAILED, "Failed ping.");
return;
}
// Check the status of connection after a delay.
const base::TimeDelta delay = last_read_time_ + hung_interval_ - now;
base::ThreadTaskRunnerHandle::Get()->PostDelayedTask(
FROM_HERE, base::Bind(&SpdySession::CheckPingStatus,
weak_factory_.GetWeakPtr(), now),
delay);
}
spdy::SpdyStreamId SpdySession::GetNewStreamId() {
CHECK_LE(stream_hi_water_mark_, kLastStreamId);
spdy::SpdyStreamId id = stream_hi_water_mark_;
stream_hi_water_mark_ += 2;
return id;
}
void SpdySession::EnqueueSessionWrite(
RequestPriority priority,
spdy::SpdyFrameType frame_type,
std::unique_ptr<spdy::SpdySerializedFrame> frame) {
DCHECK(frame_type == spdy::SpdyFrameType::RST_STREAM ||
frame_type == spdy::SpdyFrameType::SETTINGS ||
frame_type == spdy::SpdyFrameType::WINDOW_UPDATE ||
frame_type == spdy::SpdyFrameType::PING ||
frame_type == spdy::SpdyFrameType::GOAWAY);
auto buffer = std::make_unique<SpdyBuffer>(std::move(frame));
EnqueueWrite(priority, frame_type,
std::make_unique<SimpleBufferProducer>(std::move(buffer)),
base::WeakPtr<SpdyStream>(),
kSpdySessionCommandsTrafficAnnotation);
}
void SpdySession::EnqueueWrite(
RequestPriority priority,
spdy::SpdyFrameType frame_type,
std::unique_ptr<SpdyBufferProducer> producer,
const base::WeakPtr<SpdyStream>& stream,
const NetworkTrafficAnnotationTag& traffic_annotation) {
if (availability_state_ == STATE_DRAINING)
return;
write_queue_.Enqueue(priority, frame_type, std::move(producer), stream,
traffic_annotation);
MaybePostWriteLoop();
}
void SpdySession::InsertCreatedStream(std::unique_ptr<SpdyStream> stream) {
CHECK_EQ(stream->stream_id(), 0u);
CHECK(created_streams_.find(stream.get()) == created_streams_.end());
created_streams_.insert(stream.release());
}
std::unique_ptr<SpdyStream> SpdySession::ActivateCreatedStream(
SpdyStream* stream) {
CHECK_EQ(stream->stream_id(), 0u);
CHECK(created_streams_.find(stream) != created_streams_.end());
stream->set_stream_id(GetNewStreamId());
std::unique_ptr<SpdyStream> owned_stream(stream);
created_streams_.erase(stream);
return owned_stream;
}
void SpdySession::InsertActivatedStream(std::unique_ptr<SpdyStream> stream) {
spdy::SpdyStreamId stream_id = stream->stream_id();
CHECK_NE(stream_id, 0u);
std::pair<ActiveStreamMap::iterator, bool> result =
active_streams_.insert(std::make_pair(stream_id, stream.get()));
CHECK(result.second);
ignore_result(stream.release());
}
void SpdySession::DeleteStream(std::unique_ptr<SpdyStream> stream, int status) {
if (in_flight_write_stream_.get() == stream.get()) {
// If we're deleting the stream for the in-flight write, we still
// need to let the write complete, so we clear
// |in_flight_write_stream_| and let the write finish on its own
// without notifying |in_flight_write_stream_|.
in_flight_write_stream_.reset();
}
write_queue_.RemovePendingWritesForStream(stream->GetWeakPtr());
stream->OnClose(status);
if (availability_state_ == STATE_AVAILABLE) {
ProcessPendingStreamRequests();
}
}
void SpdySession::RecordPingRTTHistogram(base::TimeDelta duration) {
UMA_HISTOGRAM_CUSTOM_TIMES("Net.SpdyPing.RTT", duration,
base::TimeDelta::FromMilliseconds(1),
base::TimeDelta::FromMinutes(10), 100);
}
void SpdySession::RecordHistograms() {
UMA_HISTOGRAM_CUSTOM_COUNTS("Net.SpdyStreamsPerSession",
streams_initiated_count_, 1, 300, 50);
UMA_HISTOGRAM_CUSTOM_COUNTS("Net.SpdyStreamsPushedPerSession",
streams_pushed_count_, 1, 300, 50);
UMA_HISTOGRAM_CUSTOM_COUNTS("Net.SpdyStreamsPushedAndClaimedPerSession",
streams_pushed_and_claimed_count_, 1, 300, 50);
UMA_HISTOGRAM_CUSTOM_COUNTS("Net.SpdyStreamsAbandonedPerSession",
streams_abandoned_count_, 1, 300, 50);
UMA_HISTOGRAM_COUNTS_1M("Net.SpdySession.PushedBytes", bytes_pushed_count_);
DCHECK_LE(bytes_pushed_and_unclaimed_count_, bytes_pushed_count_);
UMA_HISTOGRAM_COUNTS_1M("Net.SpdySession.PushedAndUnclaimedBytes",
bytes_pushed_and_unclaimed_count_);
}
void SpdySession::RecordProtocolErrorHistogram(
SpdyProtocolErrorDetails details) {
UMA_HISTOGRAM_ENUMERATION("Net.SpdySessionErrorDetails2", details,
NUM_SPDY_PROTOCOL_ERROR_DETAILS);
if (base::EndsWith(host_port_pair().host(), "google.com",
base::CompareCase::INSENSITIVE_ASCII)) {
UMA_HISTOGRAM_ENUMERATION("Net.SpdySessionErrorDetails_Google2", details,
NUM_SPDY_PROTOCOL_ERROR_DETAILS);
}
}
// static
void SpdySession::RecordPushedStreamVaryResponseHeaderHistogram(
const spdy::SpdyHeaderBlock& headers) {
UMA_HISTOGRAM_ENUMERATION("Net.PushedStreamVaryResponseHeader",
ParseVaryInPushedResponse(headers),
kNumberOfVaryEntries);
}
void SpdySession::DcheckGoingAway() const {
#if DCHECK_IS_ON()
DCHECK_GE(availability_state_, STATE_GOING_AWAY);
for (int i = MINIMUM_PRIORITY; i <= MAXIMUM_PRIORITY; ++i) {
DCHECK(pending_create_stream_queues_[i].empty());
}
DCHECK(created_streams_.empty());
#endif
}
void SpdySession::DcheckDraining() const {
DcheckGoingAway();
DCHECK_EQ(availability_state_, STATE_DRAINING);
DCHECK(active_streams_.empty());
DCHECK_EQ(0u, pool_->push_promise_index()->CountStreamsForSession(this));
}
void SpdySession::DoDrainSession(Error err, const std::string& description) {
if (availability_state_ == STATE_DRAINING) {
return;
}
MakeUnavailable();
// Mark host_port_pair requiring HTTP/1.1 for subsequent connections.
if (err == ERR_HTTP_1_1_REQUIRED) {
http_server_properties_->SetHTTP11Required(host_port_pair());
}
// If |err| indicates an error occurred, inform the peer that we're closing
// and why. Don't GOAWAY on a graceful or idle close, as that may
// unnecessarily wake the radio. We could technically GOAWAY on network errors
// (we'll probably fail to actually write it, but that's okay), however many
// unit-tests would need to be updated.
if (err != OK &&
err != ERR_ABORTED && // Used by SpdySessionPool to close idle sessions.
err != ERR_NETWORK_CHANGED && // Used to deprecate sessions on IP change.
err != ERR_SOCKET_NOT_CONNECTED && err != ERR_HTTP_1_1_REQUIRED &&
err != ERR_CONNECTION_CLOSED && err != ERR_CONNECTION_RESET) {
// Enqueue a GOAWAY to inform the peer of why we're closing the connection.
spdy::SpdyGoAwayIR goaway_ir(last_accepted_push_stream_id_,
MapNetErrorToGoAwayStatus(err), description);
auto frame = std::make_unique<spdy::SpdySerializedFrame>(
buffered_spdy_framer_->SerializeFrame(goaway_ir));
EnqueueSessionWrite(HIGHEST, spdy::SpdyFrameType::GOAWAY, std::move(frame));
}
availability_state_ = STATE_DRAINING;
error_on_close_ = err;
net_log_.AddEvent(
NetLogEventType::HTTP2_SESSION_CLOSE,
base::Bind(&NetLogSpdySessionCloseCallback, err, &description));
base::UmaHistogramSparse("Net.SpdySession.ClosedOnError", -err);
if (err == OK) {
// We ought to be going away already, as this is a graceful close.
DcheckGoingAway();
} else {
StartGoingAway(0, err);
}
DcheckDraining();
MaybePostWriteLoop();
}
void SpdySession::LogAbandonedStream(SpdyStream* stream, Error status) {
DCHECK(stream);
stream->LogStreamError(status, "Abandoned.");
// We don't increment the streams abandoned counter here. If the
// stream isn't active (i.e., it hasn't written anything to the wire
// yet) then it's as if it never existed. If it is active, then
// LogAbandonedActiveStream() will increment the counters.
}
void SpdySession::LogAbandonedActiveStream(ActiveStreamMap::const_iterator it,
Error status) {
DCHECK_GT(it->first, 0u);
LogAbandonedStream(it->second, status);
++streams_abandoned_count_;
}
void SpdySession::CompleteStreamRequest(
const base::WeakPtr<SpdyStreamRequest>& pending_request) {
// Abort if the request has already been cancelled.
if (!pending_request)
return;
base::WeakPtr<SpdyStream> stream;
int rv = TryCreateStream(pending_request, &stream);
if (rv == OK) {
DCHECK(stream);
pending_request->OnRequestCompleteSuccess(stream);
return;
}
DCHECK(!stream);
if (rv != ERR_IO_PENDING) {
pending_request->OnRequestCompleteFailure(rv);
}
}
void SpdySession::CancelPushedStreamIfUnclaimed(spdy::SpdyStreamId stream_id) {
ActiveStreamMap::iterator active_it = active_streams_.find(stream_id);
if (active_it == active_streams_.end())
return;
// Make sure to cancel the correct stream. It is possible that the pushed
// stream |stream_id| is already claimed, and another stream has been pushed
// for the same URL.
const GURL& url = active_it->second->url();
if (pool_->push_promise_index()->FindStream(url, this) != stream_id) {
return;
}
RecordSpdyPushedStreamFateHistogram(SpdyPushedStreamFate::kTimeout);
LogAbandonedActiveStream(active_it, ERR_TIMED_OUT);
// CloseActiveStreamIterator() will remove the stream from
// |pool_->push_promise_index()|.
ResetStreamIterator(active_it, ERR_TIMED_OUT, "Stream not claimed.");
}
void SpdySession::OnError(
http2::Http2DecoderAdapter::SpdyFramerError spdy_framer_error) {
CHECK(in_io_loop_);
RecordProtocolErrorHistogram(
MapFramerErrorToProtocolError(spdy_framer_error));
std::string description = base::StringPrintf(
"Framer error: %d (%s).", spdy_framer_error,
http2::Http2DecoderAdapter::SpdyFramerErrorToString(spdy_framer_error));
DoDrainSession(MapFramerErrorToNetError(spdy_framer_error), description);
}
void SpdySession::OnStreamError(spdy::SpdyStreamId stream_id,
const std::string& description) {
CHECK(in_io_loop_);
ActiveStreamMap::iterator it = active_streams_.find(stream_id);
if (it == active_streams_.end()) {
// We still want to send a frame to reset the stream even if we
// don't know anything about it.
EnqueueResetStreamFrame(stream_id, IDLE, spdy::ERROR_CODE_PROTOCOL_ERROR,
description);
return;
}
ResetStreamIterator(it, ERR_SPDY_PROTOCOL_ERROR, description);
}
void SpdySession::OnPing(spdy::SpdyPingId unique_id, bool is_ack) {
CHECK(in_io_loop_);
net_log_.AddEvent(
NetLogEventType::HTTP2_SESSION_PING,
base::Bind(&NetLogSpdyPingCallback, unique_id, is_ack, "received"));
// Send response to a PING from server.
if (!is_ack) {
WritePingFrame(unique_id, true);
return;
}
--pings_in_flight_;
if (pings_in_flight_ < 0) {
RecordProtocolErrorHistogram(PROTOCOL_ERROR_UNEXPECTED_PING);
DoDrainSession(ERR_SPDY_PROTOCOL_ERROR, "pings_in_flight_ is < 0.");
pings_in_flight_ = 0;
return;
}
if (pings_in_flight_ > 0)
return;
// Record RTT in histogram when there are no more pings in flight.
RecordPingRTTHistogram(time_func_() - last_ping_sent_time_);
}
void SpdySession::OnRstStream(spdy::SpdyStreamId stream_id,
spdy::SpdyErrorCode error_code) {
CHECK(in_io_loop_);
net_log().AddEvent(
NetLogEventType::HTTP2_SESSION_RECV_RST_STREAM,
base::Bind(&NetLogSpdyRecvRstStreamCallback, stream_id, error_code));
ActiveStreamMap::iterator it = active_streams_.find(stream_id);
if (it == active_streams_.end()) {
// NOTE: it may just be that the stream was cancelled.
VLOG(1) << "Received RST for invalid stream" << stream_id;
return;
}
DCHECK(it->second);
CHECK_EQ(it->second->stream_id(), stream_id);
if (it->second->ShouldRetryRSTPushStream()) {
CloseActiveStreamIterator(it,
ERR_SPDY_CLAIMED_PUSHED_STREAM_RESET_BY_SERVER);
} else if (error_code == spdy::ERROR_CODE_NO_ERROR) {
CloseActiveStreamIterator(it, ERR_SPDY_RST_STREAM_NO_ERROR_RECEIVED);
} else if (error_code == spdy::ERROR_CODE_REFUSED_STREAM) {
CloseActiveStreamIterator(it, ERR_SPDY_SERVER_REFUSED_STREAM);
} else if (error_code == spdy::ERROR_CODE_HTTP_1_1_REQUIRED) {
// TODO(bnc): Record histogram with number of open streams capped at 50.
if (net_log().IsCapturing()) {
it->second->LogStreamError(ERR_HTTP_1_1_REQUIRED,
"Closing session because server reset stream "
"with ERR_HTTP_1_1_REQUIRED.");
}
DoDrainSession(ERR_HTTP_1_1_REQUIRED, "HTTP_1_1_REQUIRED for stream.");
} else {
RecordProtocolErrorHistogram(
PROTOCOL_ERROR_RST_STREAM_FOR_NON_ACTIVE_STREAM);
if (net_log().IsCapturing()) {
it->second->LogStreamError(ERR_SPDY_PROTOCOL_ERROR,
"Server reset stream.");
}
// TODO(mbelshe): Map from Spdy-protocol errors to something sensical.
// For now, it doesn't matter much - it is a protocol error.
CloseActiveStreamIterator(it, ERR_SPDY_PROTOCOL_ERROR);
}
}
void SpdySession::OnGoAway(spdy::SpdyStreamId last_accepted_stream_id,
spdy::SpdyErrorCode error_code,
base::StringPiece debug_data) {
CHECK(in_io_loop_);
// TODO(jgraettinger): UMA histogram on |error_code|.
net_log_.AddEvent(
NetLogEventType::HTTP2_SESSION_RECV_GOAWAY,
base::Bind(&NetLogSpdyRecvGoAwayCallback, last_accepted_stream_id,
active_streams_.size(),
pool_->push_promise_index()->CountStreamsForSession(this),
error_code, debug_data));
MakeUnavailable();
if (error_code == spdy::ERROR_CODE_HTTP_1_1_REQUIRED) {
// TODO(bnc): Record histogram with number of open streams capped at 50.
DoDrainSession(ERR_HTTP_1_1_REQUIRED, "HTTP_1_1_REQUIRED for stream.");
} else if (error_code == spdy::ERROR_CODE_NO_ERROR) {
StartGoingAway(last_accepted_stream_id, ERR_SPDY_SERVER_REFUSED_STREAM);
} else {
StartGoingAway(last_accepted_stream_id, ERR_ABORTED);
}
// This is to handle the case when we already don't have any active
// streams (i.e., StartGoingAway() did nothing). Otherwise, we have
// active streams and so the last one being closed will finish the
// going away process (see DeleteStream()).
MaybeFinishGoingAway();
}
void SpdySession::OnDataFrameHeader(spdy::SpdyStreamId stream_id,
size_t length,
bool fin) {
CHECK(in_io_loop_);
ActiveStreamMap::iterator it = active_streams_.find(stream_id);
// By the time data comes in, the stream may already be inactive.
if (it == active_streams_.end())
return;
SpdyStream* stream = it->second;
CHECK_EQ(stream->stream_id(), stream_id);
DCHECK(buffered_spdy_framer_);
stream->AddRawReceivedBytes(spdy::kDataFrameMinimumSize);
}
void SpdySession::OnStreamFrameData(spdy::SpdyStreamId stream_id,
const char* data,
size_t len) {
CHECK(in_io_loop_);
DCHECK_LT(len, 1u << 24);
if (net_log().IsCapturing()) {
net_log().AddEvent(
NetLogEventType::HTTP2_SESSION_RECV_DATA,
base::Bind(&NetLogSpdyDataCallback, stream_id, len, false));
}
// Build the buffer as early as possible so that we go through the
// session flow control checks and update
// |unacked_recv_window_bytes_| properly even when the stream is
// inactive (since the other side has still reduced its session send
// window).
std::unique_ptr<SpdyBuffer> buffer;
if (data) {
DCHECK_GT(len, 0u);
CHECK_LE(len, static_cast<size_t>(kReadBufferSize));
buffer = std::make_unique<SpdyBuffer>(data, len);
DecreaseRecvWindowSize(static_cast<int32_t>(len));
buffer->AddConsumeCallback(base::Bind(&SpdySession::OnReadBufferConsumed,
weak_factory_.GetWeakPtr()));
} else {
DCHECK_EQ(len, 0u);
}
ActiveStreamMap::iterator it = active_streams_.find(stream_id);
// By the time data comes in, the stream may already be inactive.
if (it == active_streams_.end())
return;
SpdyStream* stream = it->second;
CHECK_EQ(stream->stream_id(), stream_id);
stream->AddRawReceivedBytes(len);
stream->OnDataReceived(std::move(buffer));
}
void SpdySession::OnStreamEnd(spdy::SpdyStreamId stream_id) {
CHECK(in_io_loop_);
if (net_log().IsCapturing()) {
net_log().AddEvent(NetLogEventType::HTTP2_SESSION_RECV_DATA,
base::Bind(&NetLogSpdyDataCallback, stream_id, 0, true));
}
ActiveStreamMap::iterator it = active_streams_.find(stream_id);
// By the time data comes in, the stream may already be inactive.
if (it == active_streams_.end())
return;
SpdyStream* stream = it->second;
CHECK_EQ(stream->stream_id(), stream_id);
stream->OnDataReceived(std::unique_ptr<SpdyBuffer>());
}
void SpdySession::OnStreamPadding(spdy::SpdyStreamId stream_id, size_t len) {
CHECK(in_io_loop_);
// Decrease window size because padding bytes are received.
// Increase window size because padding bytes are consumed (by discarding).
// Net result: |session_unacked_recv_window_bytes_| increases by |len|,
// |session_recv_window_size_| does not change.
DecreaseRecvWindowSize(static_cast<int32_t>(len));
IncreaseRecvWindowSize(static_cast<int32_t>(len));
ActiveStreamMap::iterator it = active_streams_.find(stream_id);
if (it == active_streams_.end())
return;
it->second->OnPaddingConsumed(len);
}
void SpdySession::OnSettings() {
CHECK(in_io_loop_);
if (net_log_.IsCapturing()) {
net_log_.AddEvent(NetLogEventType::HTTP2_SESSION_RECV_SETTINGS);
net_log_.AddEvent(NetLogEventType::HTTP2_SESSION_SEND_SETTINGS_ACK);
}
// Send an acknowledgment of the setting.
spdy::SpdySettingsIR settings_ir;
settings_ir.set_is_ack(true);
auto frame = std::make_unique<spdy::SpdySerializedFrame>(
buffered_spdy_framer_->SerializeFrame(settings_ir));
EnqueueSessionWrite(HIGHEST, spdy::SpdyFrameType::SETTINGS, std::move(frame));
}
void SpdySession::OnSettingsAck() {
CHECK(in_io_loop_);
if (net_log_.IsCapturing())
net_log_.AddEvent(NetLogEventType::HTTP2_SESSION_RECV_SETTINGS_ACK);
}
void SpdySession::OnSetting(spdy::SpdySettingsId id, uint32_t value) {
CHECK(in_io_loop_);
HandleSetting(id, value);
// Log the setting.
net_log_.AddEvent(NetLogEventType::HTTP2_SESSION_RECV_SETTING,
base::Bind(&NetLogSpdyRecvSettingCallback, id, value));
}
void SpdySession::OnWindowUpdate(spdy::SpdyStreamId stream_id,
int delta_window_size) {
CHECK(in_io_loop_);
net_log_.AddEvent(NetLogEventType::HTTP2_SESSION_RECV_WINDOW_UPDATE,
base::Bind(&NetLogSpdyWindowUpdateFrameCallback, stream_id,
delta_window_size));
if (stream_id == spdy::kSessionFlowControlStreamId) {
// WINDOW_UPDATE for the session.
if (delta_window_size < 1) {
RecordProtocolErrorHistogram(PROTOCOL_ERROR_INVALID_WINDOW_UPDATE_SIZE);
DoDrainSession(
ERR_SPDY_PROTOCOL_ERROR,
"Received WINDOW_UPDATE with an invalid delta_window_size " +
base::IntToString(delta_window_size));
return;
}
IncreaseSendWindowSize(delta_window_size);
} else {
// WINDOW_UPDATE for a stream.
ActiveStreamMap::iterator it = active_streams_.find(stream_id);
if (it == active_streams_.end()) {
// NOTE: it may just be that the stream was cancelled.
VLOG(1) << "Received WINDOW_UPDATE for invalid stream " << stream_id;
return;
}
SpdyStream* stream = it->second;
CHECK_EQ(stream->stream_id(), stream_id);
if (delta_window_size < 1) {
ResetStreamIterator(
it, ERR_SPDY_FLOW_CONTROL_ERROR,
"Received WINDOW_UPDATE with an invalid delta_window_size.");
return;
}
CHECK_EQ(it->second->stream_id(), stream_id);
it->second->IncreaseSendWindowSize(delta_window_size);
}
}
void SpdySession::OnPushPromise(spdy::SpdyStreamId stream_id,
spdy::SpdyStreamId promised_stream_id,
spdy::SpdyHeaderBlock headers) {
CHECK(in_io_loop_);
if (net_log_.IsCapturing()) {
net_log_.AddEvent(NetLogEventType::HTTP2_SESSION_RECV_PUSH_PROMISE,
base::Bind(&NetLogSpdyPushPromiseReceivedCallback,
&headers, stream_id, promised_stream_id));
}
TryCreatePushStream(promised_stream_id, stream_id, std::move(headers));
}
void SpdySession::OnHeaders(spdy::SpdyStreamId stream_id,
bool has_priority,
int weight,
spdy::SpdyStreamId parent_stream_id,
bool exclusive,
bool fin,
spdy::SpdyHeaderBlock headers) {
CHECK(in_io_loop_);
if (net_log().IsCapturing()) {
net_log().AddEvent(NetLogEventType::HTTP2_SESSION_RECV_HEADERS,
base::Bind(&NetLogSpdyHeadersReceivedCallback, &headers,
fin, stream_id));
}
ActiveStreamMap::iterator it = active_streams_.find(stream_id);
if (it == active_streams_.end()) {
// NOTE: it may just be that the stream was cancelled.
VLOG(1) << "Received HEADERS for invalid stream " << stream_id;
return;
}
SpdyStream* stream = it->second;
CHECK_EQ(stream->stream_id(), stream_id);
if (stream->type() == SPDY_PUSH_STREAM)
RecordPushedStreamVaryResponseHeaderHistogram(headers);
stream->AddRawReceivedBytes(last_compressed_frame_len_);
last_compressed_frame_len_ = 0;
if (it->second->IsReservedRemote()) {
DCHECK_EQ(SPDY_PUSH_STREAM, stream->type());
if (max_concurrent_pushed_streams_ &&
num_active_pushed_streams_ >= max_concurrent_pushed_streams_) {
RecordSpdyPushedStreamFateHistogram(
SpdyPushedStreamFate::kTooManyPushedStreams);
ResetStream(stream_id, ERR_SPDY_CLIENT_REFUSED_STREAM,
"Stream concurrency limit reached.");
return;
}
// Will be balanced in DeleteStream.
num_active_pushed_streams_++;
}
base::Time response_time = base::Time::Now();
base::TimeTicks recv_first_byte_time = time_func_();
// May invalidate |stream|.
stream->OnHeadersReceived(headers, response_time, recv_first_byte_time);
}
void SpdySession::OnAltSvc(
spdy::SpdyStreamId stream_id,
base::StringPiece origin,
const spdy::SpdyAltSvcWireFormat::AlternativeServiceVector& altsvc_vector) {
url::SchemeHostPort scheme_host_port;
if (stream_id == 0) {
if (origin.empty())
return;
const GURL gurl(origin);
if (!gurl.is_valid() || gurl.host().empty())
return;
if (!gurl.SchemeIs(url::kHttpsScheme))
return;
SSLInfo ssl_info;
if (!GetSSLInfo(&ssl_info))
return;
if (!CanPool(transport_security_state_, ssl_info, host_port_pair().host(),
gurl.host())) {
return;
}
scheme_host_port = url::SchemeHostPort(gurl);
} else {
if (!origin.empty())
return;
const ActiveStreamMap::iterator it = active_streams_.find(stream_id);
if (it == active_streams_.end())
return;
const GURL& gurl(it->second->url());
if (!gurl.SchemeIs(url::kHttpsScheme))
return;
scheme_host_port = url::SchemeHostPort(gurl);
}
AlternativeServiceInfoVector alternative_service_info_vector;
alternative_service_info_vector.reserve(altsvc_vector.size());
const base::Time now(base::Time::Now());
DCHECK(!quic_supported_versions_.empty());
for (const spdy::SpdyAltSvcWireFormat::AlternativeService& altsvc :
altsvc_vector) {
const NextProto protocol = NextProtoFromString(altsvc.protocol_id);
if (protocol == kProtoUnknown)
continue;
// Check if QUIC version is supported. Filter supported QUIC versions.
QuicTransportVersionVector advertised_versions;
if (protocol == kProtoQUIC && !altsvc.version.empty()) {
advertised_versions = FilterSupportedAltSvcVersions(
altsvc, quic_supported_versions_, support_ietf_format_quic_altsvc_);
if (advertised_versions.empty())
continue;
}
const AlternativeService alternative_service(protocol, altsvc.host,
altsvc.port);
const base::Time expiration =
now + base::TimeDelta::FromSeconds(altsvc.max_age);
AlternativeServiceInfo alternative_service_info;
if (protocol == kProtoQUIC) {
alternative_service_info =
AlternativeServiceInfo::CreateQuicAlternativeServiceInfo(
alternative_service, expiration, advertised_versions);
} else {
alternative_service_info =
AlternativeServiceInfo::CreateHttp2AlternativeServiceInfo(
alternative_service, expiration);
}
alternative_service_info_vector.push_back(alternative_service_info);
}
http_server_properties_->SetAlternativeServices(
scheme_host_port, alternative_service_info_vector);
}
bool SpdySession::OnUnknownFrame(spdy::SpdyStreamId stream_id,
uint8_t frame_type) {
// Validate stream id.
// Was the frame sent on a stream id that has not been used in this session?
if (stream_id % 2 == 1 && stream_id > stream_hi_water_mark_)
return false;
if (stream_id % 2 == 0 && stream_id > last_accepted_push_stream_id_)
return false;
return true;
}
void SpdySession::OnSendCompressedFrame(spdy::SpdyStreamId stream_id,
spdy::SpdyFrameType type,
size_t payload_len,
size_t frame_len) {
if (type != spdy::SpdyFrameType::HEADERS) {
return;
}
DCHECK(buffered_spdy_framer_.get());
size_t compressed_len = frame_len - spdy::kFrameMinimumSize;
if (payload_len) {
// Make sure we avoid early decimal truncation.
int compression_pct = 100 - (100 * compressed_len) / payload_len;
UMA_HISTOGRAM_PERCENTAGE("Net.SpdyHeadersCompressionPercentage",
compression_pct);
}
}
void SpdySession::OnReceiveCompressedFrame(spdy::SpdyStreamId stream_id,
spdy::SpdyFrameType type,
size_t frame_len) {
last_compressed_frame_len_ = frame_len;
}
void SpdySession::OnWriteBufferConsumed(
size_t frame_payload_size,
size_t consume_size,
SpdyBuffer::ConsumeSource consume_source) {
// We can be called with |in_io_loop_| set if a write SpdyBuffer is
// deleted (e.g., a stream is closed due to incoming data).
if (consume_source == SpdyBuffer::DISCARD) {
// If we're discarding a frame or part of it, increase the send
// window by the number of discarded bytes. (Although if we're
// discarding part of a frame, it's probably because of a write
// error and we'll be tearing down the session soon.)
int remaining_payload_bytes = std::min(consume_size, frame_payload_size);
DCHECK_GT(remaining_payload_bytes, 0);
IncreaseSendWindowSize(remaining_payload_bytes);
}
// For consumed bytes, the send window is increased when we receive
// a WINDOW_UPDATE frame.
}
void SpdySession::IncreaseSendWindowSize(int delta_window_size) {
// We can be called with |in_io_loop_| set if a SpdyBuffer is
// deleted (e.g., a stream is closed due to incoming data).
DCHECK_GE(delta_window_size, 1);
// Check for overflow.
int32_t max_delta_window_size =
std::numeric_limits<int32_t>::max() - session_send_window_size_;
if (delta_window_size > max_delta_window_size) {
RecordProtocolErrorHistogram(PROTOCOL_ERROR_INVALID_WINDOW_UPDATE_SIZE);
DoDrainSession(
ERR_SPDY_PROTOCOL_ERROR,
"Received WINDOW_UPDATE [delta: " +
base::IntToString(delta_window_size) +
"] for session overflows session_send_window_size_ [current: " +
base::IntToString(session_send_window_size_) + "]");
return;
}
session_send_window_size_ += delta_window_size;
net_log_.AddEvent(NetLogEventType::HTTP2_SESSION_UPDATE_SEND_WINDOW,
base::Bind(&NetLogSpdySessionWindowUpdateCallback,
delta_window_size, session_send_window_size_));
DCHECK(!IsSendStalled());
ResumeSendStalledStreams();
}
void SpdySession::DecreaseSendWindowSize(int32_t delta_window_size) {
// We only call this method when sending a frame. Therefore,
// |delta_window_size| should be within the valid frame size range.
DCHECK_GE(delta_window_size, 1);
DCHECK_LE(delta_window_size, kMaxSpdyFrameChunkSize);
// |send_window_size_| should have been at least |delta_window_size| for
// this call to happen.
DCHECK_GE(session_send_window_size_, delta_window_size);
session_send_window_size_ -= delta_window_size;
net_log_.AddEvent(NetLogEventType::HTTP2_SESSION_UPDATE_SEND_WINDOW,
base::Bind(&NetLogSpdySessionWindowUpdateCallback,
-delta_window_size, session_send_window_size_));
}
void SpdySession::OnReadBufferConsumed(
size_t consume_size,
SpdyBuffer::ConsumeSource consume_source) {
// We can be called with |in_io_loop_| set if a read SpdyBuffer is
// deleted (e.g., discarded by a SpdyReadQueue).
DCHECK_GE(consume_size, 1u);
DCHECK_LE(consume_size,
static_cast<size_t>(std::numeric_limits<int32_t>::max()));
IncreaseRecvWindowSize(static_cast<int32_t>(consume_size));
}
void SpdySession::IncreaseRecvWindowSize(int32_t delta_window_size) {
DCHECK_GE(session_unacked_recv_window_bytes_, 0);
DCHECK_GE(session_recv_window_size_, session_unacked_recv_window_bytes_);
DCHECK_GE(delta_window_size, 1);
// Check for overflow.
DCHECK_LE(delta_window_size,
std::numeric_limits<int32_t>::max() - session_recv_window_size_);
session_recv_window_size_ += delta_window_size;
net_log_.AddEvent(NetLogEventType::HTTP2_SESSION_UPDATE_RECV_WINDOW,
base::Bind(&NetLogSpdySessionWindowUpdateCallback,
delta_window_size, session_recv_window_size_));
session_unacked_recv_window_bytes_ += delta_window_size;
if (session_unacked_recv_window_bytes_ > session_max_recv_window_size_ / 2) {
SendWindowUpdateFrame(spdy::kSessionFlowControlStreamId,
session_unacked_recv_window_bytes_, HIGHEST);
session_unacked_recv_window_bytes_ = 0;
}
}
void SpdySession::DecreaseRecvWindowSize(int32_t delta_window_size) {
CHECK(in_io_loop_);
DCHECK_GE(delta_window_size, 1);
// The receiving window size as the peer knows it is
// |session_recv_window_size_ - session_unacked_recv_window_bytes_|, if more
// data are sent by the peer, that means that the receive window is not being
// respected.
if (delta_window_size >
session_recv_window_size_ - session_unacked_recv_window_bytes_) {
RecordProtocolErrorHistogram(PROTOCOL_ERROR_RECEIVE_WINDOW_VIOLATION);
DoDrainSession(
ERR_SPDY_FLOW_CONTROL_ERROR,
"delta_window_size is " + base::IntToString(delta_window_size) +
" in DecreaseRecvWindowSize, which is larger than the receive " +
"window size of " + base::IntToString(session_recv_window_size_));
return;
}
session_recv_window_size_ -= delta_window_size;
net_log_.AddEvent(NetLogEventType::HTTP2_SESSION_UPDATE_RECV_WINDOW,
base::Bind(&NetLogSpdySessionWindowUpdateCallback,
-delta_window_size, session_recv_window_size_));
}
void SpdySession::QueueSendStalledStream(const SpdyStream& stream) {
DCHECK(stream.send_stalled_by_flow_control() || IsSendStalled());
RequestPriority priority = stream.priority();
CHECK_GE(priority, MINIMUM_PRIORITY);
CHECK_LE(priority, MAXIMUM_PRIORITY);
stream_send_unstall_queue_[priority].push_back(stream.stream_id());
}
void SpdySession::ResumeSendStalledStreams() {
// We don't have to worry about new streams being queued, since
// doing so would cause IsSendStalled() to return true. But we do
// have to worry about streams being closed, as well as ourselves
// being closed.
base::circular_deque<SpdyStream*> streams_to_requeue;
while (!IsSendStalled()) {
size_t old_size = 0;
#if DCHECK_IS_ON()
old_size = GetTotalSize(stream_send_unstall_queue_);
#endif
spdy::SpdyStreamId stream_id = PopStreamToPossiblyResume();
if (stream_id == 0)
break;
ActiveStreamMap::const_iterator it = active_streams_.find(stream_id);
// The stream may actually still be send-stalled after this (due
// to its own send window) but that's okay -- it'll then be
// resumed once its send window increases.
if (it != active_streams_.end()) {
if (it->second->PossiblyResumeIfSendStalled() == SpdyStream::Requeue)
streams_to_requeue.push_back(it->second);
}
// The size should decrease unless we got send-stalled again.
if (!IsSendStalled())
DCHECK_LT(GetTotalSize(stream_send_unstall_queue_), old_size);
}
while (!streams_to_requeue.empty()) {
SpdyStream* stream = streams_to_requeue.front();
streams_to_requeue.pop_front();
QueueSendStalledStream(*stream);
}
}
spdy::SpdyStreamId SpdySession::PopStreamToPossiblyResume() {
for (int i = MAXIMUM_PRIORITY; i >= MINIMUM_PRIORITY; --i) {
base::circular_deque<spdy::SpdyStreamId>* queue =
&stream_send_unstall_queue_[i];
if (!queue->empty()) {
spdy::SpdyStreamId stream_id = queue->front();
queue->pop_front();
return stream_id;
}
}
return 0;
}
} // namespace net
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