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android / platform / external / chromium_org / 31cddfd4ec55fcfc2129f5fbb6b805caa05239e6 / . / net / spdy / spdy_session.cc
blob: d9a5108b362da4f24a50d4a1bf5fc4a0dd400b70 [file] [log] [blame]
// 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 <map>
#include "base/basictypes.h"
#include "base/bind.h"
#include "base/compiler_specific.h"
#include "base/logging.h"
#include "base/message_loop/message_loop.h"
#include "base/metrics/field_trial.h"
#include "base/metrics/histogram.h"
#include "base/metrics/sparse_histogram.h"
#include "base/metrics/stats_counters.h"
#include "base/profiler/scoped_tracker.h"
#include "base/stl_util.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_util.h"
#include "base/strings/stringprintf.h"
#include "base/strings/utf_string_conversions.h"
#include "base/time/time.h"
#include "base/values.h"
#include "crypto/ec_private_key.h"
#include "crypto/ec_signature_creator.h"
#include "net/base/connection_type_histograms.h"
#include "net/base/net_log.h"
#include "net/base/net_util.h"
#include "net/cert/asn1_util.h"
#include "net/cert/cert_verify_result.h"
#include "net/http/http_log_util.h"
#include "net/http/http_network_session.h"
#include "net/http/http_server_properties.h"
#include "net/http/http_util.h"
#include "net/http/transport_security_state.h"
#include "net/socket/ssl_client_socket.h"
#include "net/spdy/spdy_buffer_producer.h"
#include "net/spdy/spdy_frame_builder.h"
#include "net/spdy/spdy_http_utils.h"
#include "net/spdy/spdy_protocol.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"
namespace net {
namespace {
const int kReadBufferSize = 8 * 1024;
const int kDefaultConnectionAtRiskOfLossSeconds = 10;
const int kHungIntervalSeconds = 10;
// Minimum seconds that unclaimed pushed streams will be kept in memory.
const int kMinPushedStreamLifetimeSeconds = 300;
scoped_ptr<base::ListValue> SpdyHeaderBlockToListValue(
const SpdyHeaderBlock& headers,
net::NetLog::LogLevel log_level) {
scoped_ptr<base::ListValue> headers_list(new base::ListValue());
for (SpdyHeaderBlock::const_iterator it = headers.begin();
it != headers.end(); ++it) {
headers_list->AppendString(
it->first + ": " +
ElideHeaderValueForNetLog(log_level, it->first, it->second));
}
return headers_list.Pass();
}
base::Value* NetLogSpdySynStreamSentCallback(const SpdyHeaderBlock* headers,
bool fin,
bool unidirectional,
SpdyPriority spdy_priority,
SpdyStreamId stream_id,
NetLog::LogLevel log_level) {
base::DictionaryValue* dict = new base::DictionaryValue();
dict->Set("headers",
SpdyHeaderBlockToListValue(*headers, log_level).release());
dict->SetBoolean("fin", fin);
dict->SetBoolean("unidirectional", unidirectional);
dict->SetInteger("spdy_priority", static_cast<int>(spdy_priority));
dict->SetInteger("stream_id", stream_id);
return dict;
}
base::Value* NetLogSpdySynStreamReceivedCallback(
const SpdyHeaderBlock* headers,
bool fin,
bool unidirectional,
SpdyPriority spdy_priority,
SpdyStreamId stream_id,
SpdyStreamId associated_stream,
NetLog::LogLevel log_level) {
base::DictionaryValue* dict = new base::DictionaryValue();
dict->Set("headers",
SpdyHeaderBlockToListValue(*headers, log_level).release());
dict->SetBoolean("fin", fin);
dict->SetBoolean("unidirectional", unidirectional);
dict->SetInteger("spdy_priority", static_cast<int>(spdy_priority));
dict->SetInteger("stream_id", stream_id);
dict->SetInteger("associated_stream", associated_stream);
return dict;
}
base::Value* NetLogSpdySynReplyOrHeadersReceivedCallback(
const SpdyHeaderBlock* headers,
bool fin,
SpdyStreamId stream_id,
NetLog::LogLevel log_level) {
base::DictionaryValue* dict = new base::DictionaryValue();
dict->Set("headers",
SpdyHeaderBlockToListValue(*headers, log_level).release());
dict->SetBoolean("fin", fin);
dict->SetInteger("stream_id", stream_id);
return dict;
}
base::Value* NetLogSpdySessionCloseCallback(int net_error,
const std::string* description,
NetLog::LogLevel /* log_level */) {
base::DictionaryValue* dict = new base::DictionaryValue();
dict->SetInteger("net_error", net_error);
dict->SetString("description", *description);
return dict;
}
base::Value* NetLogSpdySessionCallback(const HostPortProxyPair* host_pair,
NetLog::LogLevel /* log_level */) {
base::DictionaryValue* dict = new base::DictionaryValue();
dict->SetString("host", host_pair->first.ToString());
dict->SetString("proxy", host_pair->second.ToPacString());
return dict;
}
base::Value* NetLogSpdyInitializedCallback(NetLog::Source source,
const NextProto protocol_version,
NetLog::LogLevel /* log_level */) {
base::DictionaryValue* dict = new base::DictionaryValue();
if (source.IsValid()) {
source.AddToEventParameters(dict);
}
dict->SetString("protocol",
SSLClientSocket::NextProtoToString(protocol_version));
return dict;
}
base::Value* NetLogSpdySettingsCallback(const HostPortPair& host_port_pair,
bool clear_persisted,
NetLog::LogLevel /* log_level */) {
base::DictionaryValue* dict = new base::DictionaryValue();
dict->SetString("host", host_port_pair.ToString());
dict->SetBoolean("clear_persisted", clear_persisted);
return dict;
}
base::Value* NetLogSpdySettingCallback(SpdySettingsIds id,
const SpdyMajorVersion protocol_version,
SpdySettingsFlags flags,
uint32 value,
NetLog::LogLevel /* log_level */) {
base::DictionaryValue* dict = new base::DictionaryValue();
dict->SetInteger("id",
SpdyConstants::SerializeSettingId(protocol_version, id));
dict->SetInteger("flags", flags);
dict->SetInteger("value", value);
return dict;
}
base::Value* NetLogSpdySendSettingsCallback(
const SettingsMap* settings,
const SpdyMajorVersion protocol_version,
NetLog::LogLevel /* log_level */) {
base::DictionaryValue* dict = new base::DictionaryValue();
base::ListValue* settings_list = new base::ListValue();
for (SettingsMap::const_iterator it = settings->begin();
it != settings->end(); ++it) {
const SpdySettingsIds id = it->first;
const SpdySettingsFlags flags = it->second.first;
const uint32 value = it->second.second;
settings_list->Append(new base::StringValue(base::StringPrintf(
"[id:%u flags:%u value:%u]",
SpdyConstants::SerializeSettingId(protocol_version, id),
flags,
value)));
}
dict->Set("settings", settings_list);
return dict;
}
base::Value* NetLogSpdyWindowUpdateFrameCallback(
SpdyStreamId stream_id,
uint32 delta,
NetLog::LogLevel /* log_level */) {
base::DictionaryValue* dict = new base::DictionaryValue();
dict->SetInteger("stream_id", static_cast<int>(stream_id));
dict->SetInteger("delta", delta);
return dict;
}
base::Value* NetLogSpdySessionWindowUpdateCallback(
int32 delta,
int32 window_size,
NetLog::LogLevel /* log_level */) {
base::DictionaryValue* dict = new base::DictionaryValue();
dict->SetInteger("delta", delta);
dict->SetInteger("window_size", window_size);
return dict;
}
base::Value* NetLogSpdyDataCallback(SpdyStreamId stream_id,
int size,
bool fin,
NetLog::LogLevel /* log_level */) {
base::DictionaryValue* dict = new base::DictionaryValue();
dict->SetInteger("stream_id", static_cast<int>(stream_id));
dict->SetInteger("size", size);
dict->SetBoolean("fin", fin);
return dict;
}
base::Value* NetLogSpdyRstCallback(SpdyStreamId stream_id,
int status,
const std::string* description,
NetLog::LogLevel /* log_level */) {
base::DictionaryValue* dict = new base::DictionaryValue();
dict->SetInteger("stream_id", static_cast<int>(stream_id));
dict->SetInteger("status", status);
dict->SetString("description", *description);
return dict;
}
base::Value* NetLogSpdyPingCallback(SpdyPingId unique_id,
bool is_ack,
const char* type,
NetLog::LogLevel /* log_level */) {
base::DictionaryValue* dict = new base::DictionaryValue();
dict->SetInteger("unique_id", unique_id);
dict->SetString("type", type);
dict->SetBoolean("is_ack", is_ack);
return dict;
}
base::Value* NetLogSpdyGoAwayCallback(SpdyStreamId last_stream_id,
int active_streams,
int unclaimed_streams,
SpdyGoAwayStatus status,
NetLog::LogLevel /* log_level */) {
base::DictionaryValue* dict = new 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->SetInteger("status", static_cast<int>(status));
return dict;
}
base::Value* NetLogSpdyPushPromiseReceivedCallback(
const SpdyHeaderBlock* headers,
SpdyStreamId stream_id,
SpdyStreamId promised_stream_id,
NetLog::LogLevel log_level) {
base::DictionaryValue* dict = new base::DictionaryValue();
dict->Set("headers",
SpdyHeaderBlockToListValue(*headers, log_level).release());
dict->SetInteger("id", stream_id);
dict->SetInteger("promised_stream_id", promised_stream_id);
return 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:
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;
} // namespace
SpdyProtocolErrorDetails MapFramerErrorToProtocolError(
SpdyFramer::SpdyError err) {
switch(err) {
case SpdyFramer::SPDY_NO_ERROR:
return SPDY_ERROR_NO_ERROR;
case SpdyFramer::SPDY_INVALID_CONTROL_FRAME:
return SPDY_ERROR_INVALID_CONTROL_FRAME;
case SpdyFramer::SPDY_CONTROL_PAYLOAD_TOO_LARGE:
return SPDY_ERROR_CONTROL_PAYLOAD_TOO_LARGE;
case SpdyFramer::SPDY_ZLIB_INIT_FAILURE:
return SPDY_ERROR_ZLIB_INIT_FAILURE;
case SpdyFramer::SPDY_UNSUPPORTED_VERSION:
return SPDY_ERROR_UNSUPPORTED_VERSION;
case SpdyFramer::SPDY_DECOMPRESS_FAILURE:
return SPDY_ERROR_DECOMPRESS_FAILURE;
case SpdyFramer::SPDY_COMPRESS_FAILURE:
return SPDY_ERROR_COMPRESS_FAILURE;
case SpdyFramer::SPDY_GOAWAY_FRAME_CORRUPT:
return SPDY_ERROR_GOAWAY_FRAME_CORRUPT;
case SpdyFramer::SPDY_RST_STREAM_FRAME_CORRUPT:
return SPDY_ERROR_RST_STREAM_FRAME_CORRUPT;
case SpdyFramer::SPDY_INVALID_DATA_FRAME_FLAGS:
return SPDY_ERROR_INVALID_DATA_FRAME_FLAGS;
case SpdyFramer::SPDY_INVALID_CONTROL_FRAME_FLAGS:
return SPDY_ERROR_INVALID_CONTROL_FRAME_FLAGS;
case SpdyFramer::SPDY_UNEXPECTED_FRAME:
return SPDY_ERROR_UNEXPECTED_FRAME;
default:
NOTREACHED();
return static_cast<SpdyProtocolErrorDetails>(-1);
}
}
Error MapFramerErrorToNetError(SpdyFramer::SpdyError err) {
switch (err) {
case SpdyFramer::SPDY_NO_ERROR:
return OK;
case SpdyFramer::SPDY_INVALID_CONTROL_FRAME:
return ERR_SPDY_PROTOCOL_ERROR;
case SpdyFramer::SPDY_CONTROL_PAYLOAD_TOO_LARGE:
return ERR_SPDY_FRAME_SIZE_ERROR;
case SpdyFramer::SPDY_ZLIB_INIT_FAILURE:
return ERR_SPDY_COMPRESSION_ERROR;
case SpdyFramer::SPDY_UNSUPPORTED_VERSION:
return ERR_SPDY_PROTOCOL_ERROR;
case SpdyFramer::SPDY_DECOMPRESS_FAILURE:
return ERR_SPDY_COMPRESSION_ERROR;
case SpdyFramer::SPDY_COMPRESS_FAILURE:
return ERR_SPDY_COMPRESSION_ERROR;
case SpdyFramer::SPDY_GOAWAY_FRAME_CORRUPT:
return ERR_SPDY_PROTOCOL_ERROR;
case SpdyFramer::SPDY_RST_STREAM_FRAME_CORRUPT:
return ERR_SPDY_PROTOCOL_ERROR;
case SpdyFramer::SPDY_INVALID_DATA_FRAME_FLAGS:
return ERR_SPDY_PROTOCOL_ERROR;
case SpdyFramer::SPDY_INVALID_CONTROL_FRAME_FLAGS:
return ERR_SPDY_PROTOCOL_ERROR;
case SpdyFramer::SPDY_UNEXPECTED_FRAME:
return ERR_SPDY_PROTOCOL_ERROR;
default:
NOTREACHED();
return ERR_SPDY_PROTOCOL_ERROR;
}
}
SpdyProtocolErrorDetails MapRstStreamStatusToProtocolError(
SpdyRstStreamStatus status) {
switch(status) {
case RST_STREAM_PROTOCOL_ERROR:
return STATUS_CODE_PROTOCOL_ERROR;
case RST_STREAM_INVALID_STREAM:
return STATUS_CODE_INVALID_STREAM;
case RST_STREAM_REFUSED_STREAM:
return STATUS_CODE_REFUSED_STREAM;
case RST_STREAM_UNSUPPORTED_VERSION:
return STATUS_CODE_UNSUPPORTED_VERSION;
case RST_STREAM_CANCEL:
return STATUS_CODE_CANCEL;
case RST_STREAM_INTERNAL_ERROR:
return STATUS_CODE_INTERNAL_ERROR;
case RST_STREAM_FLOW_CONTROL_ERROR:
return STATUS_CODE_FLOW_CONTROL_ERROR;
case RST_STREAM_STREAM_IN_USE:
return STATUS_CODE_STREAM_IN_USE;
case RST_STREAM_STREAM_ALREADY_CLOSED:
return STATUS_CODE_STREAM_ALREADY_CLOSED;
case RST_STREAM_INVALID_CREDENTIALS:
return STATUS_CODE_INVALID_CREDENTIALS;
case RST_STREAM_FRAME_SIZE_ERROR:
return STATUS_CODE_FRAME_SIZE_ERROR;
case RST_STREAM_SETTINGS_TIMEOUT:
return STATUS_CODE_SETTINGS_TIMEOUT;
case RST_STREAM_CONNECT_ERROR:
return STATUS_CODE_CONNECT_ERROR;
case RST_STREAM_ENHANCE_YOUR_CALM:
return STATUS_CODE_ENHANCE_YOUR_CALM;
default:
NOTREACHED();
return static_cast<SpdyProtocolErrorDetails>(-1);
}
}
SpdyGoAwayStatus MapNetErrorToGoAwayStatus(Error err) {
switch (err) {
case OK:
return GOAWAY_NO_ERROR;
case ERR_SPDY_PROTOCOL_ERROR:
return GOAWAY_PROTOCOL_ERROR;
case ERR_SPDY_FLOW_CONTROL_ERROR:
return GOAWAY_FLOW_CONTROL_ERROR;
case ERR_SPDY_FRAME_SIZE_ERROR:
return GOAWAY_FRAME_SIZE_ERROR;
case ERR_SPDY_COMPRESSION_ERROR:
return GOAWAY_COMPRESSION_ERROR;
case ERR_SPDY_INADEQUATE_TRANSPORT_SECURITY:
return GOAWAY_INADEQUATE_SECURITY;
default:
return GOAWAY_PROTOCOL_ERROR;
}
}
void SplitPushedHeadersToRequestAndResponse(const SpdyHeaderBlock& headers,
SpdyMajorVersion protocol_version,
SpdyHeaderBlock* request_headers,
SpdyHeaderBlock* response_headers) {
DCHECK(response_headers);
DCHECK(request_headers);
for (SpdyHeaderBlock::const_iterator it = headers.begin();
it != headers.end();
++it) {
SpdyHeaderBlock* to_insert = response_headers;
if (protocol_version == SPDY2) {
if (it->first == "url")
to_insert = request_headers;
} else {
const char* host = protocol_version >= SPDY4 ? ":authority" : ":host";
static const char* scheme = ":scheme";
static const char* path = ":path";
if (it->first == host || it->first == scheme || it->first == path)
to_insert = request_headers;
}
to_insert->insert(*it);
}
}
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 BoundNetLog& net_log,
const CompletionCallback& callback) {
DCHECK(session);
DCHECK(!session_);
DCHECK(!stream_);
DCHECK(callback_.is_null());
type_ = type;
session_ = session;
url_ = url;
priority_ = priority;
net_log_ = net_log;
callback_ = callback;
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;
}
void SpdyStreamRequest::OnRequestCompleteSuccess(
const base::WeakPtr<SpdyStream>& stream) {
DCHECK(session_);
DCHECK(!stream_);
DCHECK(!callback_.is_null());
CompletionCallback callback = callback_;
Reset();
DCHECK(stream);
stream_ = stream;
callback.Run(OK);
}
void SpdyStreamRequest::OnRequestCompleteFailure(int rv) {
DCHECK(session_);
DCHECK(!stream_);
DCHECK(!callback_.is_null());
CompletionCallback callback = callback_;
Reset();
DCHECK_NE(rv, OK);
callback.Run(rv);
}
void SpdyStreamRequest::Reset() {
type_ = SPDY_BIDIRECTIONAL_STREAM;
session_.reset();
stream_.reset();
url_ = GURL();
priority_ = MINIMUM_PRIORITY;
net_log_ = BoundNetLog();
callback_.Reset();
}
SpdySession::ActiveStreamInfo::ActiveStreamInfo()
: stream(NULL),
waiting_for_syn_reply(false) {}
SpdySession::ActiveStreamInfo::ActiveStreamInfo(SpdyStream* stream)
: stream(stream),
waiting_for_syn_reply(stream->type() != SPDY_PUSH_STREAM) {
}
SpdySession::ActiveStreamInfo::~ActiveStreamInfo() {}
SpdySession::PushedStreamInfo::PushedStreamInfo() : stream_id(0) {}
SpdySession::PushedStreamInfo::PushedStreamInfo(
SpdyStreamId stream_id,
base::TimeTicks creation_time)
: stream_id(stream_id),
creation_time(creation_time) {}
SpdySession::PushedStreamInfo::~PushedStreamInfo() {}
// 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;
}
bool unused = false;
if (!ssl_info.cert->VerifyNameMatch(new_hostname, &unused))
return false;
std::string pinning_failure_log;
if (!transport_security_state->CheckPublicKeyPins(
new_hostname,
ssl_info.is_issued_by_known_root,
ssl_info.public_key_hashes,
&pinning_failure_log)) {
return false;
}
return true;
}
SpdySession::SpdySession(
const SpdySessionKey& spdy_session_key,
const base::WeakPtr<HttpServerProperties>& http_server_properties,
TransportSecurityState* transport_security_state,
bool verify_domain_authentication,
bool enable_sending_initial_data,
bool enable_compression,
bool enable_ping_based_connection_checking,
NextProto default_protocol,
size_t stream_initial_recv_window_size,
size_t initial_max_concurrent_streams,
size_t max_concurrent_streams_limit,
TimeFunc time_func,
const HostPortPair& trusted_spdy_proxy,
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),
read_buffer_(new IOBuffer(kReadBufferSize)),
stream_hi_water_mark_(kFirstStreamId),
last_accepted_push_stream_id_(0),
num_pushed_streams_(0u),
num_active_pushed_streams_(0u),
in_flight_write_frame_type_(DATA),
in_flight_write_frame_size_(0),
is_secure_(false),
certificate_error_code_(OK),
availability_state_(STATE_AVAILABLE),
read_state_(READ_STATE_DO_READ),
write_state_(WRITE_STATE_IDLE),
error_on_close_(OK),
max_concurrent_streams_(initial_max_concurrent_streams == 0
? kInitialMaxConcurrentStreams
: initial_max_concurrent_streams),
max_concurrent_streams_limit_(max_concurrent_streams_limit == 0
? kMaxConcurrentStreamLimit
: max_concurrent_streams_limit),
max_concurrent_pushed_streams_(kMaxConcurrentPushedStreams),
streams_initiated_count_(0),
streams_pushed_count_(0),
streams_pushed_and_claimed_count_(0),
streams_abandoned_count_(0),
total_bytes_received_(0),
sent_settings_(false),
received_settings_(false),
stalled_streams_(0),
pings_in_flight_(0),
next_ping_id_(1),
last_activity_time_(time_func()),
last_compressed_frame_len_(0),
check_ping_status_pending_(false),
send_connection_header_prefix_(false),
flow_control_state_(FLOW_CONTROL_NONE),
stream_initial_send_window_size_(kSpdyStreamInitialWindowSize),
stream_initial_recv_window_size_(stream_initial_recv_window_size == 0
? kDefaultInitialRecvWindowSize
: stream_initial_recv_window_size),
session_send_window_size_(0),
session_recv_window_size_(0),
session_unacked_recv_window_bytes_(0),
net_log_(BoundNetLog::Make(net_log, NetLog::SOURCE_SPDY_SESSION)),
verify_domain_authentication_(verify_domain_authentication),
enable_sending_initial_data_(enable_sending_initial_data),
enable_compression_(enable_compression),
enable_ping_based_connection_checking_(
enable_ping_based_connection_checking),
protocol_(default_protocol),
connection_at_risk_of_loss_time_(
base::TimeDelta::FromSeconds(kDefaultConnectionAtRiskOfLossSeconds)),
hung_interval_(base::TimeDelta::FromSeconds(kHungIntervalSeconds)),
trusted_spdy_proxy_(trusted_spdy_proxy),
time_func_(time_func),
weak_factory_(this) {
DCHECK_GE(protocol_, kProtoSPDYMinimumVersion);
DCHECK_LE(protocol_, kProtoSPDYMaximumVersion);
DCHECK(HttpStreamFactory::spdy_enabled());
net_log_.BeginEvent(
NetLog::TYPE_SPDY_SESSION,
base::Bind(&NetLogSpdySessionCallback, &host_port_proxy_pair()));
next_unclaimed_push_stream_sweep_time_ = time_func_() +
base::TimeDelta::FromSeconds(kMinPushedStreamLifetimeSeconds);
// 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(NetLog::TYPE_SPDY_SESSION);
}
void SpdySession::InitializeWithSocket(
scoped_ptr<ClientSocketHandle> connection,
SpdySessionPool* pool,
bool is_secure,
int certificate_error_code) {
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_);
DCHECK(certificate_error_code == OK ||
certificate_error_code < ERR_IO_PENDING);
// TODO(akalin): Check connection->is_initialized() instead. This
// requires re-working CreateFakeSpdySession(), though.
DCHECK(connection->socket());
base::StatsCounter spdy_sessions("spdy.sessions");
spdy_sessions.Increment();
connection_ = connection.Pass();
is_secure_ = is_secure;
certificate_error_code_ = certificate_error_code;
NextProto protocol_negotiated =
connection_->socket()->GetNegotiatedProtocol();
if (protocol_negotiated != kProtoUnknown) {
protocol_ = protocol_negotiated;
}
DCHECK_GE(protocol_, kProtoSPDYMinimumVersion);
DCHECK_LE(protocol_, kProtoSPDYMaximumVersion);
if (protocol_ == kProtoSPDY4)
send_connection_header_prefix_ = true;
if (protocol_ >= kProtoSPDY31) {
flow_control_state_ = FLOW_CONTROL_STREAM_AND_SESSION;
session_send_window_size_ = kSpdySessionInitialWindowSize;
session_recv_window_size_ = kSpdySessionInitialWindowSize;
} else if (protocol_ >= kProtoSPDY3) {
flow_control_state_ = FLOW_CONTROL_STREAM;
} else {
flow_control_state_ = FLOW_CONTROL_NONE;
}
buffered_spdy_framer_.reset(
new BufferedSpdyFramer(NextProtoToSpdyMajorVersion(protocol_),
enable_compression_));
buffered_spdy_framer_->set_visitor(this);
buffered_spdy_framer_->set_debug_visitor(this);
UMA_HISTOGRAM_ENUMERATION(
"Net.SpdyVersion2",
protocol_ - kProtoSPDYMinimumVersion,
kProtoSPDYMaximumVersion - kProtoSPDYMinimumVersion + 1);
net_log_.AddEvent(NetLog::TYPE_SPDY_SESSION_INITIALIZED,
base::Bind(&NetLogSpdyInitializedCallback,
connection_->socket()->NetLog().source(),
protocol_));
DCHECK_EQ(availability_state_, STATE_AVAILABLE);
connection_->AddHigherLayeredPool(this);
if (enable_sending_initial_data_)
SendInitialData();
pool_ = pool;
// Bootstrap the read loop.
base::MessageLoop::current()->PostTask(
FROM_HERE,
base::Bind(&SpdySession::PumpReadLoop,
weak_factory_.GetWeakPtr(), READ_STATE_DO_READ, OK));
}
bool SpdySession::VerifyDomainAuthentication(const std::string& domain) {
if (!verify_domain_authentication_)
return true;
if (availability_state_ == STATE_DRAINING)
return false;
SSLInfo ssl_info;
bool was_npn_negotiated;
NextProto protocol_negotiated = kProtoUnknown;
if (!GetSSLInfo(&ssl_info, &was_npn_negotiated, &protocol_negotiated))
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);
}
int SpdySession::GetPushStream(
const GURL& url,
base::WeakPtr<SpdyStream>* stream,
const BoundNetLog& stream_net_log) {
CHECK(!in_io_loop_);
stream->reset();
if (availability_state_ == STATE_DRAINING)
return ERR_CONNECTION_CLOSED;
Error err = TryAccessStream(url);
if (err != OK)
return err;
*stream = GetActivePushStream(url);
if (*stream) {
DCHECK_LT(streams_pushed_and_claimed_count_, streams_pushed_count_);
streams_pushed_and_claimed_count_++;
}
return OK;
}
// {,Try}CreateStream() and TryAccessStream() can be called with
// |in_io_loop_| set if a stream is being created in response to
// another being closed due to received data.
Error SpdySession::TryAccessStream(const GURL& url) {
if (is_secure_ && certificate_error_code_ != OK &&
(url.SchemeIs("https") || url.SchemeIs("wss"))) {
RecordProtocolErrorHistogram(
PROTOCOL_ERROR_REQUEST_FOR_SECURE_CONTENT_OVER_INSECURE_SESSION);
DoDrainSession(
static_cast<Error>(certificate_error_code_),
"Tried to get SPDY stream for secure content over an unauthenticated "
"session.");
return ERR_SPDY_PROTOCOL_ERROR;
}
return OK;
}
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;
Error err = TryAccessStream(request->url());
if (err != OK)
return err;
if (!max_concurrent_streams_ ||
(active_streams_.size() + created_streams_.size() - num_pushed_streams_ <
max_concurrent_streams_)) {
return CreateStream(*request, stream);
}
stalled_streams_++;
net_log().AddEvent(NetLog::TYPE_SPDY_SESSION_STALLED_MAX_STREAMS);
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;
Error err = TryAccessStream(request.url());
if (err != OK) {
// This should have been caught in TryCreateStream().
NOTREACHED();
return err;
}
DCHECK(connection_->socket());
DCHECK(connection_->socket()->IsConnected());
if (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;
}
}
scoped_ptr<SpdyStream> new_stream(
new SpdyStream(request.type(), GetWeakPtr(), request.url(),
request.priority(),
stream_initial_send_window_size_,
stream_initial_recv_window_size_,
request.net_log()));
*stream = new_stream->GetWeakPtr();
InsertCreatedStream(new_stream.Pass());
UMA_HISTOGRAM_CUSTOM_COUNTS(
"Net.SpdyPriorityCount",
static_cast<int>(request.priority()), 0, 10, 11);
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() {
// Like |max_concurrent_streams_|, 0 means infinite for
// |max_requests_to_process|.
size_t max_requests_to_process = 0;
if (max_concurrent_streams_ != 0) {
max_requests_to_process =
max_concurrent_streams_ -
(active_streams_.size() + created_streams_.size());
}
for (size_t i = 0;
max_requests_to_process == 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::MessageLoop::current()->PostTask(
FROM_HERE,
base::Bind(&SpdySession::CompleteStreamRequest,
weak_factory_.GetWeakPtr(),
pending_request));
}
}
void SpdySession::AddPooledAlias(const SpdySessionKey& alias_key) {
pooled_aliases_.insert(alias_key);
}
SpdyMajorVersion SpdySession::GetProtocolVersion() const {
DCHECK(buffered_spdy_framer_.get());
return buffered_spdy_framer_->protocol_version();
}
bool SpdySession::HasAcceptableTransportSecurity() const {
// If we're not even using TLS, we have no standards to meet.
if (!is_secure_) {
return true;
}
// We don't enforce transport security standards for older SPDY versions.
if (GetProtocolVersion() < SPDY4) {
return true;
}
SSLInfo ssl_info;
CHECK(connection_->socket()->GetSSLInfo(&ssl_info));
// HTTP/2 requires TLS 1.2+
if (SSLConnectionStatusToVersion(ssl_info.connection_status) <
SSL_CONNECTION_VERSION_TLS1_2) {
return false;
}
if (!IsSecureTLSCipherSuite(
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;
}
void SpdySession::EnqueueStreamWrite(
const base::WeakPtr<SpdyStream>& stream,
SpdyFrameType frame_type,
scoped_ptr<SpdyBufferProducer> producer) {
DCHECK(frame_type == HEADERS ||
frame_type == DATA ||
frame_type == CREDENTIAL ||
frame_type == SYN_STREAM);
EnqueueWrite(stream->priority(), frame_type, producer.Pass(), stream);
}
scoped_ptr<SpdyFrame> SpdySession::CreateSynStream(
SpdyStreamId stream_id,
RequestPriority priority,
SpdyControlFlags flags,
const SpdyHeaderBlock& block) {
ActiveStreamMap::const_iterator it = active_streams_.find(stream_id);
CHECK(it != active_streams_.end());
CHECK_EQ(it->second.stream->stream_id(), stream_id);
SendPrefacePingIfNoneInFlight();
DCHECK(buffered_spdy_framer_.get());
SpdyPriority spdy_priority =
ConvertRequestPriorityToSpdyPriority(priority, GetProtocolVersion());
scoped_ptr<SpdyFrame> syn_frame;
// TODO(hkhalil): Avoid copy of |block|.
if (GetProtocolVersion() <= SPDY3) {
SpdySynStreamIR syn_stream(stream_id);
syn_stream.set_associated_to_stream_id(0);
syn_stream.set_priority(spdy_priority);
syn_stream.set_fin((flags & CONTROL_FLAG_FIN) != 0);
syn_stream.set_unidirectional((flags & CONTROL_FLAG_UNIDIRECTIONAL) != 0);
syn_stream.set_name_value_block(block);
syn_frame.reset(buffered_spdy_framer_->SerializeFrame(syn_stream));
} else {
SpdyHeadersIR headers(stream_id);
headers.set_priority(spdy_priority);
headers.set_has_priority(true);
headers.set_fin((flags & CONTROL_FLAG_FIN) != 0);
headers.set_name_value_block(block);
syn_frame.reset(buffered_spdy_framer_->SerializeFrame(headers));
}
base::StatsCounter spdy_requests("spdy.requests");
spdy_requests.Increment();
streams_initiated_count_++;
if (net_log().IsLogging()) {
net_log().AddEvent(NetLog::TYPE_SPDY_SESSION_SYN_STREAM,
base::Bind(&NetLogSpdySynStreamSentCallback,
&block,
(flags & CONTROL_FLAG_FIN) != 0,
(flags & CONTROL_FLAG_UNIDIRECTIONAL) != 0,
spdy_priority,
stream_id));
}
return syn_frame.Pass();
}
scoped_ptr<SpdyBuffer> SpdySession::CreateDataBuffer(SpdyStreamId stream_id,
IOBuffer* data,
int len,
SpdyDataFlags flags) {
if (availability_state_ == STATE_DRAINING) {
return scoped_ptr<SpdyBuffer>();
}
ActiveStreamMap::const_iterator it = active_streams_.find(stream_id);
CHECK(it != active_streams_.end());
SpdyStream* stream = it->second.stream;
CHECK_EQ(stream->stream_id(), stream_id);
if (len < 0) {
NOTREACHED();
return scoped_ptr<SpdyBuffer>();
}
int effective_len = std::min(len, kMaxSpdyFrameChunkSize);
bool send_stalled_by_stream =
(flow_control_state_ >= FLOW_CONTROL_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;
}
if (flow_control_state_ == FLOW_CONTROL_STREAM) {
UMA_HISTOGRAM_ENUMERATION(
"Net.SpdyFrameStreamFlowControlState",
frame_flow_control_state,
SEND_STALLED_BY_STREAM + 1);
} else if (flow_control_state_ == FLOW_CONTROL_STREAM_AND_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 stream flow control is
// enabled.
if (flow_control_state_ >= FLOW_CONTROL_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(
NetLog::TYPE_SPDY_SESSION_STREAM_STALLED_BY_STREAM_SEND_WINDOW,
NetLog::IntegerCallback("stream_id", stream_id));
return scoped_ptr<SpdyBuffer>();
}
effective_len = std::min(effective_len, stream->send_window_size());
}
// Obey send window size of the session if session flow control is
// enabled.
if (flow_control_state_ == FLOW_CONTROL_STREAM_AND_SESSION) {
if (send_stalled_by_session) {
stream->set_send_stalled_by_flow_control(true);
QueueSendStalledStream(*stream);
net_log().AddEvent(
NetLog::TYPE_SPDY_SESSION_STREAM_STALLED_BY_SESSION_SEND_WINDOW,
NetLog::IntegerCallback("stream_id", stream_id));
return scoped_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<SpdyDataFlags>(flags & ~DATA_FLAG_FIN);
if (net_log().IsLogging()) {
net_log().AddEvent(
NetLog::TYPE_SPDY_SESSION_SEND_DATA,
base::Bind(&NetLogSpdyDataCallback, stream_id, effective_len,
(flags & DATA_FLAG_FIN) != 0));
}
// Send PrefacePing for DATA_FRAMEs with nonzero payload size.
if (effective_len > 0)
SendPrefacePingIfNoneInFlight();
// TODO(mbelshe): reduce memory copies here.
DCHECK(buffered_spdy_framer_.get());
scoped_ptr<SpdyFrame> frame(
buffered_spdy_framer_->CreateDataFrame(
stream_id, data->data(),
static_cast<uint32>(effective_len), flags));
scoped_ptr<SpdyBuffer> data_buffer(new SpdyBuffer(frame.Pass()));
// Send window size is based on payload size, so nothing to do if this is
// just a FIN with no payload.
if (flow_control_state_ == FLOW_CONTROL_STREAM_AND_SESSION &&
effective_len != 0) {
DecreaseSendWindowSize(static_cast<int32>(effective_len));
data_buffer->AddConsumeCallback(
base::Bind(&SpdySession::OnWriteBufferConsumed,
weak_factory_.GetWeakPtr(),
static_cast<size_t>(effective_len)));
}
return data_buffer.Pass();
}
void SpdySession::CloseActiveStream(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(SpdyStreamId stream_id,
SpdyRstStreamStatus status,
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, status, description);
}
bool SpdySession::IsStreamActive(SpdyStreamId stream_id) const {
return 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;
}
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.
scoped_ptr<SpdyStream> owned_stream(it->second.stream);
active_streams_.erase(it);
// 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) {
unclaimed_pushed_streams_.erase(owned_stream->url());
num_pushed_streams_--;
if (!owned_stream->IsReservedRemote())
num_active_pushed_streams_--;
}
DeleteStream(owned_stream.Pass(), status);
MaybeFinishGoingAway();
// 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() && connection_->IsPoolStalled()) {
DoDrainSession(ERR_CONNECTION_CLOSED, "Closing idle connection.");
}
}
void SpdySession::CloseCreatedStreamIterator(CreatedStreamSet::iterator it,
int status) {
scoped_ptr<SpdyStream> owned_stream(*it);
created_streams_.erase(it);
DeleteStream(owned_stream.Pass(), status);
}
void SpdySession::ResetStreamIterator(ActiveStreamMap::iterator it,
SpdyRstStreamStatus status,
const std::string& description) {
// Send the RST_STREAM frame first as CloseActiveStreamIterator()
// may close us.
SpdyStreamId stream_id = it->first;
RequestPriority priority = it->second.stream->priority();
EnqueueResetStreamFrame(stream_id, priority, status, description);
// Removes any pending writes for the stream except for possibly an
// in-flight one.
CloseActiveStreamIterator(it, ERR_SPDY_PROTOCOL_ERROR);
}
void SpdySession::EnqueueResetStreamFrame(SpdyStreamId stream_id,
RequestPriority priority,
SpdyRstStreamStatus status,
const std::string& description) {
DCHECK_NE(stream_id, 0u);
net_log().AddEvent(
NetLog::TYPE_SPDY_SESSION_SEND_RST_STREAM,
base::Bind(&NetLogSpdyRstCallback, stream_id, status, &description));
DCHECK(buffered_spdy_framer_.get());
scoped_ptr<SpdyFrame> rst_frame(
buffered_spdy_framer_->CreateRstStream(stream_id, status));
EnqueueSessionWrite(priority, RST_STREAM, rst_frame.Pass());
RecordProtocolErrorHistogram(MapRstStreamStatusToProtocolError(status));
}
void SpdySession::PumpReadLoop(ReadState expected_read_state, int result) {
// TODO(vadimt): Remove ScopedTracker below once crbug.com/418183 is fixed.
tracked_objects::ScopedTracker tracking_profile(
FROM_HERE_WITH_EXPLICIT_FUNCTION(
"418183 DoReadCallback => SpdySession::PumpReadLoop"));
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;
// 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 (bytes_read_without_yielding > kMaxReadBytesWithoutYielding) {
read_state_ = READ_STATE_DO_READ;
base::MessageLoop::current()->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() {
CHECK(in_io_loop_);
CHECK(connection_);
CHECK(connection_->socket());
read_state_ = READ_STATE_DO_READ_COMPLETE;
return connection_->socket()->Read(
read_buffer_.get(),
kReadBufferSize,
base::Bind(&SpdySession::PumpReadLoop,
weak_factory_.GetWeakPtr(), READ_STATE_DO_READ_COMPLETE));
}
int SpdySession::DoReadComplete(int result) {
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) {
UMA_HISTOGRAM_CUSTOM_COUNTS("Net.SpdySession.BytesRead.EOF",
total_bytes_received_, 1, 100000000, 50);
DoDrainSession(ERR_CONNECTION_CLOSED, "Connection closed");
return ERR_CONNECTION_CLOSED;
}
if (result < 0) {
DoDrainSession(static_cast<Error>(result), "result is < 0.");
return result;
}
CHECK_LE(result, kReadBufferSize);
total_bytes_received_ += result;
last_activity_time_ = time_func_();
DCHECK(buffered_spdy_framer_.get());
char* data = read_buffer_->data();
while (result > 0) {
uint32 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_->error_code(), SpdyFramer::SPDY_NO_ERROR);
}
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;
}
}
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.
SpdyFrameType frame_type = DATA;
scoped_ptr<SpdyBufferProducer> producer;
base::WeakPtr<SpdyStream> stream;
if (!write_queue_.Dequeue(&frame_type, &producer, &stream)) {
write_state_ = WRITE_STATE_IDLE;
return ERR_IO_PENDING;
}
if (stream.get())
CHECK(!stream->IsClosed());
// Activate the stream only when sending the SYN_STREAM frame to
// guarantee monotonically-increasing stream IDs.
if (frame_type == SYN_STREAM) {
CHECK(stream.get());
CHECK_EQ(stream->stream_id(), 0u);
scoped_ptr<SpdyStream> owned_stream =
ActivateCreatedStream(stream.get());
InsertActivatedStream(owned_stream.Pass());
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_,
buffered_spdy_framer_->GetFrameMinimumSize());
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));
}
int SpdySession::DoWriteComplete(int result) {
CHECK(in_io_loop_);
DCHECK_NE(result, ERR_IO_PENDING);
DCHECK_GT(in_flight_write_->GetRemainingSize(), 0u);
last_activity_time_ = time_func_();
if (result < 0) {
DCHECK_NE(result, ERR_IO_PENDING);
in_flight_write_.reset();
in_flight_write_frame_type_ = DATA;
in_flight_write_frame_size_ = 0;
in_flight_write_stream_.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));
// 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_ = DATA;
in_flight_write_frame_size_ = 0;
in_flight_write_stream_.reset();
}
}
write_state_ = WRITE_STATE_DO_WRITE;
return OK;
}
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(unclaimed_pushed_streams_.empty());
}
void SpdySession::StartGoingAway(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();
}
void SpdySession::MaybeFinishGoingAway() {
if (active_streams_.empty() && availability_state_ == STATE_GOING_AWAY) {
DoDrainSession(OK, "Finished going away");
}
}
void SpdySession::DoDrainSession(Error err, const std::string& description) {
if (availability_state_ == STATE_DRAINING) {
return;
}
MakeUnavailable();
// 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_CONNECTION_CLOSED && err != ERR_CONNECTION_RESET) {
// Enqueue a GOAWAY to inform the peer of why we're closing the connection.
SpdyGoAwayIR goaway_ir(last_accepted_push_stream_id_,
MapNetErrorToGoAwayStatus(err),
description);
EnqueueSessionWrite(HIGHEST,
GOAWAY,
scoped_ptr<SpdyFrame>(
buffered_spdy_framer_->SerializeFrame(goaway_ir)));
}
availability_state_ = STATE_DRAINING;
error_on_close_ = err;
net_log_.AddEvent(
NetLog::TYPE_SPDY_SESSION_CLOSE,
base::Bind(&NetLogSpdySessionCloseCallback, err, &description));
UMA_HISTOGRAM_SPARSE_SLOWLY("Net.SpdySession.ClosedOnError", -err);
UMA_HISTOGRAM_CUSTOM_COUNTS("Net.SpdySession.BytesRead.OtherErrors",
total_bytes_received_, 1, 100000000, 50);
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);
std::string description = base::StringPrintf(
"ABANDONED (stream_id=%d): ", stream->stream_id()) +
stream->url().spec();
stream->LogStreamError(status, description);
// 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.stream, status);
++streams_abandoned_count_;
base::StatsCounter abandoned_streams("spdy.abandoned_streams");
abandoned_streams.Increment();
if (it->second.stream->type() == SPDY_PUSH_STREAM &&
unclaimed_pushed_streams_.find(it->second.stream->url()) !=
unclaimed_pushed_streams_.end()) {
base::StatsCounter abandoned_push_streams("spdy.abandoned_push_streams");
abandoned_push_streams.Increment();
}
}
SpdyStreamId SpdySession::GetNewStreamId() {
CHECK_LE(stream_hi_water_mark_, kLastStreamId);
SpdyStreamId id = stream_hi_water_mark_;
stream_hi_water_mark_ += 2;
return id;
}
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());
}
}
base::Value* SpdySession::GetInfoAsValue() const {
base::DictionaryValue* dict = new base::DictionaryValue();
dict->SetInteger("source_id", net_log_.source().id);
dict->SetString("host_port_pair", host_port_pair().ToString());
if (!pooled_aliases_.empty()) {
base::ListValue* alias_list = new base::ListValue();
for (std::set<SpdySessionKey>::const_iterator it =
pooled_aliases_.begin();
it != pooled_aliases_.end(); it++) {
alias_list->Append(new base::StringValue(
it->host_port_pair().ToString()));
}
dict->Set("aliases", alias_list);
}
dict->SetString("proxy", host_port_proxy_pair().second.ToURI());
dict->SetInteger("active_streams", active_streams_.size());
dict->SetInteger("unclaimed_pushed_streams",
unclaimed_pushed_streams_.size());
dict->SetBoolean("is_secure", is_secure_);
dict->SetString("protocol_negotiated",
SSLClientSocket::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->SetBoolean("sent_settings", sent_settings_);
dict->SetBoolean("received_settings", received_settings_);
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 dict;
}
bool SpdySession::IsReused() const {
return buffered_spdy_framer_->frames_received() > 0 ||
connection_->reuse_type() == ClientSocketHandle::UNUSED_IDLE;
}
bool SpdySession::GetLoadTimingInfo(SpdyStreamId stream_id,
LoadTimingInfo* load_timing_info) const {
return connection_->GetLoadTimingInfo(stream_id != kFirstStreamId,
load_timing_info);
}
int SpdySession::GetPeerAddress(IPEndPoint* address) const {
int rv = ERR_SOCKET_NOT_CONNECTED;
if (connection_->socket()) {
rv = connection_->socket()->GetPeerAddress(address);
}
UMA_HISTOGRAM_BOOLEAN("Net.SpdySessionSocketNotConnectedGetPeerAddress",
rv == ERR_SOCKET_NOT_CONNECTED);
return rv;
}
int SpdySession::GetLocalAddress(IPEndPoint* address) const {
int rv = ERR_SOCKET_NOT_CONNECTED;
if (connection_->socket()) {
rv = connection_->socket()->GetLocalAddress(address);
}
UMA_HISTOGRAM_BOOLEAN("Net.SpdySessionSocketNotConnectedGetLocalAddress",
rv == ERR_SOCKET_NOT_CONNECTED);
return rv;
}
void SpdySession::EnqueueSessionWrite(RequestPriority priority,
SpdyFrameType frame_type,
scoped_ptr<SpdyFrame> frame) {
DCHECK(frame_type == RST_STREAM || frame_type == SETTINGS ||
frame_type == WINDOW_UPDATE || frame_type == PING ||
frame_type == GOAWAY);
EnqueueWrite(
priority, frame_type,
scoped_ptr<SpdyBufferProducer>(
new SimpleBufferProducer(
scoped_ptr<SpdyBuffer>(new SpdyBuffer(frame.Pass())))),
base::WeakPtr<SpdyStream>());
}
void SpdySession::EnqueueWrite(RequestPriority priority,
SpdyFrameType frame_type,
scoped_ptr<SpdyBufferProducer> producer,
const base::WeakPtr<SpdyStream>& stream) {
if (availability_state_ == STATE_DRAINING)
return;
write_queue_.Enqueue(priority, frame_type, producer.Pass(), stream);
MaybePostWriteLoop();
}
void SpdySession::MaybePostWriteLoop() {
if (write_state_ == WRITE_STATE_IDLE) {
CHECK(!in_flight_write_);
write_state_ = WRITE_STATE_DO_WRITE;
base::MessageLoop::current()->PostTask(
FROM_HERE,
base::Bind(&SpdySession::PumpWriteLoop,
weak_factory_.GetWeakPtr(), WRITE_STATE_DO_WRITE, OK));
}
}
void SpdySession::InsertCreatedStream(scoped_ptr<SpdyStream> stream) {
CHECK_EQ(stream->stream_id(), 0u);
CHECK(created_streams_.find(stream.get()) == created_streams_.end());
created_streams_.insert(stream.release());
}
scoped_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());
scoped_ptr<SpdyStream> owned_stream(stream);
created_streams_.erase(stream);
return owned_stream.Pass();
}
void SpdySession::InsertActivatedStream(scoped_ptr<SpdyStream> stream) {
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, ActiveStreamInfo(stream.get())));
CHECK(result.second);
ignore_result(stream.release());
}
void SpdySession::DeleteStream(scoped_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();
}
}
base::WeakPtr<SpdyStream> SpdySession::GetActivePushStream(const GURL& url) {
base::StatsCounter used_push_streams("spdy.claimed_push_streams");
PushedStreamMap::iterator unclaimed_it = unclaimed_pushed_streams_.find(url);
if (unclaimed_it == unclaimed_pushed_streams_.end())
return base::WeakPtr<SpdyStream>();
SpdyStreamId stream_id = unclaimed_it->second.stream_id;
unclaimed_pushed_streams_.erase(unclaimed_it);
ActiveStreamMap::iterator active_it = active_streams_.find(stream_id);
if (active_it == active_streams_.end()) {
NOTREACHED();
return base::WeakPtr<SpdyStream>();
}
net_log_.AddEvent(NetLog::TYPE_SPDY_STREAM_ADOPTED_PUSH_STREAM);
used_push_streams.Increment();
return active_it->second.stream->GetWeakPtr();
}
bool SpdySession::GetSSLInfo(SSLInfo* ssl_info,
bool* was_npn_negotiated,
NextProto* protocol_negotiated) {
*was_npn_negotiated = connection_->socket()->WasNpnNegotiated();
*protocol_negotiated = connection_->socket()->GetNegotiatedProtocol();
return connection_->socket()->GetSSLInfo(ssl_info);
}
bool SpdySession::GetSSLCertRequestInfo(
SSLCertRequestInfo* cert_request_info) {
if (!is_secure_)
return false;
GetSSLClientSocket()->GetSSLCertRequestInfo(cert_request_info);
return true;
}
void SpdySession::OnError(SpdyFramer::SpdyError error_code) {
CHECK(in_io_loop_);
RecordProtocolErrorHistogram(MapFramerErrorToProtocolError(error_code));
std::string description =
base::StringPrintf("Framer error: %d (%s).",
error_code,
SpdyFramer::ErrorCodeToString(error_code));
DoDrainSession(MapFramerErrorToNetError(error_code), description);
}
void SpdySession::OnStreamError(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, RST_STREAM_PROTOCOL_ERROR, description);
return;
}
ResetStreamIterator(it, RST_STREAM_PROTOCOL_ERROR, description);
}
void SpdySession::OnDataFrameHeader(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.stream;
CHECK_EQ(stream->stream_id(), stream_id);
DCHECK(buffered_spdy_framer_);
size_t header_len = buffered_spdy_framer_->GetDataFrameMinimumSize();
stream->IncrementRawReceivedBytes(header_len);
}
void SpdySession::OnStreamFrameData(SpdyStreamId stream_id,
const char* data,
size_t len,
bool fin) {
CHECK(in_io_loop_);
if (data == NULL && len != 0) {
// This is notification of consumed data padding.
// TODO(jgraettinger): Properly flow padding into WINDOW_UPDATE frames.
// See crbug.com/353012.
return;
}
DCHECK_LT(len, 1u << 24);
if (net_log().IsLogging()) {
net_log().AddEvent(
NetLog::TYPE_SPDY_SESSION_RECV_DATA,
base::Bind(&NetLogSpdyDataCallback, stream_id, len, fin));
}
// 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).
scoped_ptr<SpdyBuffer> buffer;
if (data) {
DCHECK_GT(len, 0u);
CHECK_LE(len, static_cast<size_t>(kReadBufferSize));
buffer.reset(new SpdyBuffer(data, len));
if (flow_control_state_ == FLOW_CONTROL_STREAM_AND_SESSION) {
DecreaseRecvWindowSize(static_cast<int32>(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.stream;
CHECK_EQ(stream->stream_id(), stream_id);
stream->IncrementRawReceivedBytes(len);
if (it->second.waiting_for_syn_reply) {
const std::string& error = "Data received before SYN_REPLY.";
stream->LogStreamError(ERR_SPDY_PROTOCOL_ERROR, error);
ResetStreamIterator(it, RST_STREAM_PROTOCOL_ERROR, error);
return;
}
stream->OnDataReceived(buffer.Pass());
}
void SpdySession::OnSettings(bool clear_persisted) {
CHECK(in_io_loop_);
if (clear_persisted)
http_server_properties_->ClearSpdySettings(host_port_pair());
if (net_log_.IsLogging()) {
net_log_.AddEvent(
NetLog::TYPE_SPDY_SESSION_RECV_SETTINGS,
base::Bind(&NetLogSpdySettingsCallback, host_port_pair(),
clear_persisted));
}
if (GetProtocolVersion() >= SPDY4) {
// Send an acknowledgment of the setting.
SpdySettingsIR settings_ir;
settings_ir.set_is_ack(true);
EnqueueSessionWrite(
HIGHEST,
SETTINGS,
scoped_ptr<SpdyFrame>(
buffered_spdy_framer_->SerializeFrame(settings_ir)));
}
}
void SpdySession::OnSetting(SpdySettingsIds id,
uint8 flags,
uint32 value) {
CHECK(in_io_loop_);
HandleSetting(id, value);
http_server_properties_->SetSpdySetting(
host_port_pair(),
id,
static_cast<SpdySettingsFlags>(flags),
value);
received_settings_ = true;
// Log the setting.
const SpdyMajorVersion protocol_version = GetProtocolVersion();
net_log_.AddEvent(NetLog::TYPE_SPDY_SESSION_RECV_SETTING,
base::Bind(&NetLogSpdySettingCallback,
id,
protocol_version,
static_cast<SpdySettingsFlags>(flags),
value));
}
void SpdySession::OnSendCompressedFrame(
SpdyStreamId stream_id,
SpdyFrameType type,
size_t payload_len,
size_t frame_len) {
if (type != SYN_STREAM && type != HEADERS)
return;
DCHECK(buffered_spdy_framer_.get());
size_t compressed_len =
frame_len - buffered_spdy_framer_->GetSynStreamMinimumSize();
if (payload_len) {
// Make sure we avoid early decimal truncation.
int compression_pct = 100 - (100 * compressed_len) / payload_len;
UMA_HISTOGRAM_PERCENTAGE("Net.SpdySynStreamCompressionPercentage",
compression_pct);
}
}
void SpdySession::OnReceiveCompressedFrame(
SpdyStreamId stream_id,
SpdyFrameType type,
size_t frame_len) {
last_compressed_frame_len_ = frame_len;
}
int SpdySession::OnInitialResponseHeadersReceived(
const SpdyHeaderBlock& response_headers,
base::Time response_time,
base::TimeTicks recv_first_byte_time,
SpdyStream* stream) {
CHECK(in_io_loop_);
SpdyStreamId stream_id = stream->stream_id();
if (stream->type() == SPDY_PUSH_STREAM) {
DCHECK(stream->IsReservedRemote());
if (max_concurrent_pushed_streams_ &&
num_active_pushed_streams_ >= max_concurrent_pushed_streams_) {
ResetStream(stream_id,
RST_STREAM_REFUSED_STREAM,
"Stream concurrency limit reached.");
return STATUS_CODE_REFUSED_STREAM;
}
}
if (stream->type() == SPDY_PUSH_STREAM) {
// Will be balanced in DeleteStream.
num_active_pushed_streams_++;
}
// May invalidate |stream|.
int rv = stream->OnInitialResponseHeadersReceived(
response_headers, response_time, recv_first_byte_time);
if (rv < 0) {
DCHECK_NE(rv, ERR_IO_PENDING);
DCHECK(active_streams_.find(stream_id) == active_streams_.end());
}
return rv;
}
void SpdySession::OnSynStream(SpdyStreamId stream_id,
SpdyStreamId associated_stream_id,
SpdyPriority priority,
bool fin,
bool unidirectional,
const SpdyHeaderBlock& headers) {
CHECK(in_io_loop_);
if (GetProtocolVersion() >= SPDY4) {
DCHECK_EQ(0u, associated_stream_id);
OnHeaders(stream_id, fin, headers);
return;
}
base::Time response_time = base::Time::Now();
base::TimeTicks recv_first_byte_time = time_func_();
if (net_log_.IsLogging()) {
net_log_.AddEvent(
NetLog::TYPE_SPDY_SESSION_PUSHED_SYN_STREAM,
base::Bind(&NetLogSpdySynStreamReceivedCallback,
&headers, fin, unidirectional, priority,
stream_id, associated_stream_id));
}
// Split headers to simulate push promise and response.
SpdyHeaderBlock request_headers;
SpdyHeaderBlock response_headers;
SplitPushedHeadersToRequestAndResponse(
headers, GetProtocolVersion(), &request_headers, &response_headers);
if (!TryCreatePushStream(
stream_id, associated_stream_id, priority, request_headers))
return;
ActiveStreamMap::iterator active_it = active_streams_.find(stream_id);
if (active_it == active_streams_.end()) {
NOTREACHED();
return;
}
if (OnInitialResponseHeadersReceived(response_headers,
response_time,
recv_first_byte_time,
active_it->second.stream) != OK)
return;
base::StatsCounter push_requests("spdy.pushed_streams");
push_requests.Increment();
}
void SpdySession::DeleteExpiredPushedStreams() {
if (unclaimed_pushed_streams_.empty())
return;
// Check that adequate time has elapsed since the last sweep.
if (time_func_() < next_unclaimed_push_stream_sweep_time_)
return;
// Gather old streams to delete.
base::TimeTicks minimum_freshness = time_func_() -
base::TimeDelta::FromSeconds(kMinPushedStreamLifetimeSeconds);
std::vector<SpdyStreamId> streams_to_close;
for (PushedStreamMap::iterator it = unclaimed_pushed_streams_.begin();
it != unclaimed_pushed_streams_.end(); ++it) {
if (minimum_freshness > it->second.creation_time)
streams_to_close.push_back(it->second.stream_id);
}
for (std::vector<SpdyStreamId>::const_iterator to_close_it =
streams_to_close.begin();
to_close_it != streams_to_close.end(); ++to_close_it) {
ActiveStreamMap::iterator active_it = active_streams_.find(*to_close_it);
if (active_it == active_streams_.end())
continue;
LogAbandonedActiveStream(active_it, ERR_INVALID_SPDY_STREAM);
// CloseActiveStreamIterator() will remove the stream from
// |unclaimed_pushed_streams_|.
ResetStreamIterator(
active_it, RST_STREAM_REFUSED_STREAM, "Stream not claimed.");
}
next_unclaimed_push_stream_sweep_time_ = time_func_() +
base::TimeDelta::FromSeconds(kMinPushedStreamLifetimeSeconds);
}
void SpdySession::OnSynReply(SpdyStreamId stream_id,
bool fin,
const SpdyHeaderBlock& headers) {
CHECK(in_io_loop_);
base::Time response_time = base::Time::Now();
base::TimeTicks recv_first_byte_time = time_func_();
if (net_log().IsLogging()) {
net_log().AddEvent(
NetLog::TYPE_SPDY_SESSION_SYN_REPLY,
base::Bind(&NetLogSpdySynReplyOrHeadersReceivedCallback,
&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.
return;
}
SpdyStream* stream = it->second.stream;
CHECK_EQ(stream->stream_id(), stream_id);
stream->IncrementRawReceivedBytes(last_compressed_frame_len_);
last_compressed_frame_len_ = 0;
if (GetProtocolVersion() >= SPDY4) {
const std::string& error =
"SPDY4 wasn't expecting SYN_REPLY.";
stream->LogStreamError(ERR_SPDY_PROTOCOL_ERROR, error);
ResetStreamIterator(it, RST_STREAM_PROTOCOL_ERROR, error);
return;
}
if (!it->second.waiting_for_syn_reply) {
const std::string& error =
"Received duplicate SYN_REPLY for stream.";
stream->LogStreamError(ERR_SPDY_PROTOCOL_ERROR, error);
ResetStreamIterator(it, RST_STREAM_PROTOCOL_ERROR, error);
return;
}
it->second.waiting_for_syn_reply = false;
ignore_result(OnInitialResponseHeadersReceived(
headers, response_time, recv_first_byte_time, stream));
}
void SpdySession::OnHeaders(SpdyStreamId stream_id,
bool fin,
const SpdyHeaderBlock& headers) {
CHECK(in_io_loop_);
if (net_log().IsLogging()) {
net_log().AddEvent(
NetLog::TYPE_SPDY_SESSION_RECV_HEADERS,
base::Bind(&NetLogSpdySynReplyOrHeadersReceivedCallback,
&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.
LOG(WARNING) << "Received HEADERS for invalid stream " << stream_id;
return;
}
SpdyStream* stream = it->second.stream;
CHECK_EQ(stream->stream_id(), stream_id);
stream->IncrementRawReceivedBytes(last_compressed_frame_len_);
last_compressed_frame_len_ = 0;
base::Time response_time = base::Time::Now();
base::TimeTicks recv_first_byte_time = time_func_();
if (it->second.waiting_for_syn_reply) {
if (GetProtocolVersion() < SPDY4) {
const std::string& error =
"Was expecting SYN_REPLY, not HEADERS.";
stream->LogStreamError(ERR_SPDY_PROTOCOL_ERROR, error);
ResetStreamIterator(it, RST_STREAM_PROTOCOL_ERROR, error);
return;
}
it->second.waiting_for_syn_reply = false;
ignore_result(OnInitialResponseHeadersReceived(
headers, response_time, recv_first_byte_time, stream));
} else if (it->second.stream->IsReservedRemote()) {
ignore_result(OnInitialResponseHeadersReceived(
headers, response_time, recv_first_byte_time, stream));
} else {
int rv = stream->OnAdditionalResponseHeadersReceived(headers);
if (rv < 0) {
DCHECK_NE(rv, ERR_IO_PENDING);
DCHECK(active_streams_.find(stream_id) == active_streams_.end());
}
}
}
bool SpdySession::OnUnknownFrame(SpdyStreamId stream_id, int 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::OnRstStream(SpdyStreamId stream_id,
SpdyRstStreamStatus status) {
CHECK(in_io_loop_);
std::string description;
net_log().AddEvent(
NetLog::TYPE_SPDY_SESSION_RST_STREAM,
base::Bind(&NetLogSpdyRstCallback,
stream_id, status, &description));
ActiveStreamMap::iterator it = active_streams_.find(stream_id);
if (it == active_streams_.end()) {
// NOTE: it may just be that the stream was cancelled.
LOG(WARNING) << "Received RST for invalid stream" << stream_id;
return;
}
CHECK_EQ(it->second.stream->stream_id(), stream_id);
if (status == 0) {
it->second.stream->OnDataReceived(scoped_ptr<SpdyBuffer>());
} else if (status == RST_STREAM_REFUSED_STREAM) {
CloseActiveStreamIterator(it, ERR_SPDY_SERVER_REFUSED_STREAM);
} else {
RecordProtocolErrorHistogram(
PROTOCOL_ERROR_RST_STREAM_FOR_NON_ACTIVE_STREAM);
it->second.stream->LogStreamError(
ERR_SPDY_PROTOCOL_ERROR,
base::StringPrintf("SPDY stream closed with status: %d", status));
// 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(SpdyStreamId last_accepted_stream_id,
SpdyGoAwayStatus status) {
CHECK(in_io_loop_);
// TODO(jgraettinger): UMA histogram on |status|.
net_log_.AddEvent(NetLog::TYPE_SPDY_SESSION_GOAWAY,
base::Bind(&NetLogSpdyGoAwayCallback,
last_accepted_stream_id,
active_streams_.size(),
unclaimed_pushed_streams_.size(),
status));
MakeUnavailable();
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::OnPing(SpdyPingId unique_id, bool is_ack) {
CHECK(in_io_loop_);
net_log_.AddEvent(
NetLog::TYPE_SPDY_SESSION_PING,
base::Bind(&NetLogSpdyPingCallback, unique_id, is_ack, "received"));
// Send response to a PING from server.
if ((protocol_ >= kProtoSPDY4 && !is_ack) ||
(protocol_ < kProtoSPDY4 && unique_id % 2 == 0)) {
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;
// We will record RTT in histogram when there are no more client sent
// pings_in_flight_.
RecordPingRTTHistogram(time_func_() - last_ping_sent_time_);
}
void SpdySession::OnWindowUpdate(SpdyStreamId stream_id,
uint32 delta_window_size) {
CHECK(in_io_loop_);
DCHECK_LE(delta_window_size, static_cast<uint32>(kint32max));
net_log_.AddEvent(
NetLog::TYPE_SPDY_SESSION_RECEIVED_WINDOW_UPDATE_FRAME,
base::Bind(&NetLogSpdyWindowUpdateFrameCallback,
stream_id, delta_window_size));
if (stream_id == kSessionFlowControlStreamId) {
// WINDOW_UPDATE for the session.
if (flow_control_state_ < FLOW_CONTROL_STREAM_AND_SESSION) {
LOG(WARNING) << "Received WINDOW_UPDATE for session when "
<< "session flow control is not turned on";
// TODO(akalin): Record an error and close the session.
return;
}
if (delta_window_size < 1u) {
RecordProtocolErrorHistogram(PROTOCOL_ERROR_INVALID_WINDOW_UPDATE_SIZE);
DoDrainSession(
ERR_SPDY_PROTOCOL_ERROR,
"Received WINDOW_UPDATE with an invalid delta_window_size " +
base::UintToString(delta_window_size));
return;
}
IncreaseSendWindowSize(static_cast<int32>(delta_window_size));
} else {
// WINDOW_UPDATE for a stream.
if (flow_control_state_ < FLOW_CONTROL_STREAM) {
// TODO(akalin): Record an error and close the session.
LOG(WARNING) << "Received WINDOW_UPDATE for stream " << stream_id
<< " when flow control is not turned on";
return;
}
ActiveStreamMap::iterator it = active_streams_.find(stream_id);
if (it == active_streams_.end()) {
// NOTE: it may just be that the stream was cancelled.
LOG(WARNING) << "Received WINDOW_UPDATE for invalid stream " << stream_id;
return;
}
SpdyStream* stream = it->second.stream;
CHECK_EQ(stream->stream_id(), stream_id);
if (delta_window_size < 1u) {
ResetStreamIterator(it,
RST_STREAM_FLOW_CONTROL_ERROR,
base::StringPrintf(
"Received WINDOW_UPDATE with an invalid "
"delta_window_size %ud", delta_window_size));
return;
}
CHECK_EQ(it->second.stream->stream_id(), stream_id);
it->second.stream->IncreaseSendWindowSize(
static_cast<int32>(delta_window_size));
}
}
bool SpdySession::TryCreatePushStream(SpdyStreamId stream_id,
SpdyStreamId associated_stream_id,
SpdyPriority priority,
const SpdyHeaderBlock& headers) {
// Server-initiated streams should have even sequence numbers.
if ((stream_id & 0x1) != 0) {
LOG(WARNING) << "Received invalid push stream id " << stream_id;
if (GetProtocolVersion() > SPDY2)
CloseSessionOnError(ERR_SPDY_PROTOCOL_ERROR, "Odd push stream id.");
return false;
}
if (GetProtocolVersion() > SPDY2) {
if (stream_id <= last_accepted_push_stream_id_) {
LOG(WARNING) << "Received push stream id lesser or equal to the last "
<< "accepted before " << stream_id;
CloseSessionOnError(
ERR_SPDY_PROTOCOL_ERROR,
"New push stream id must be greater than the last accepted.");
return false;
}
}
if (IsStreamActive(stream_id)) {
// For SPDY3 and higher we should not get here, we'll start going away
// earlier on |last_seen_push_stream_id_| check.
CHECK_GT(SPDY3, GetProtocolVersion());
LOG(WARNING) << "Received push for active stream " << stream_id;
return false;
}
last_accepted_push_stream_id_ = stream_id;
RequestPriority request_priority =
ConvertSpdyPriorityToRequestPriority(priority, GetProtocolVersion());
if (availability_state_ == STATE_GOING_AWAY) {
// TODO(akalin): This behavior isn't in the SPDY spec, although it
// probably should be.
EnqueueResetStreamFrame(stream_id,
request_priority,
RST_STREAM_REFUSED_STREAM,
"push stream request received when going away");
return false;
}
if (associated_stream_id == 0) {
// In SPDY4 0 stream id in PUSH_PROMISE frame leads to framer error and
// session going away. We should never get here.
CHECK_GT(SPDY4, GetProtocolVersion());
std::string description = base::StringPrintf(
"Received invalid associated stream id %d for pushed stream %d",
associated_stream_id,
stream_id);
EnqueueResetStreamFrame(
stream_id, request_priority, RST_STREAM_REFUSED_STREAM, description);
return false;
}
streams_pushed_count_++;
// TODO(mbelshe): DCHECK that this is a GET method?
// Verify that the response had a URL for us.
GURL gurl = GetUrlFromHeaderBlock(headers, GetProtocolVersion(), true);
if (!gurl.is_valid()) {
EnqueueResetStreamFrame(stream_id,
request_priority,
RST_STREAM_PROTOCOL_ERROR,
"Pushed stream url was invalid: " + gurl.spec());
return false;
}
// Verify we have a valid stream association.
ActiveStreamMap::iterator associated_it =
active_streams_.find(associated_stream_id);
if (associated_it == active_streams_.end()) {
EnqueueResetStreamFrame(
stream_id,
request_priority,
RST_STREAM_INVALID_STREAM,
base::StringPrintf("Received push for inactive associated stream %d",
associated_stream_id));
return false;
}
// Check that the pushed stream advertises the same origin as its associated
// stream. Bypass this check if and only if this session is with a SPDY proxy
// that is trusted explicitly via the --trusted-spdy-proxy switch.
if (trusted_spdy_proxy_.Equals(host_port_pair())) {
// Disallow pushing of HTTPS content.
if (gurl.SchemeIs("https")) {
EnqueueResetStreamFrame(
stream_id,
request_priority,
RST_STREAM_REFUSED_STREAM,
base::StringPrintf("Rejected push of Cross Origin HTTPS content %d",
associated_stream_id));
}
} else {
GURL associated_url(associated_it->second.stream->GetUrlFromHeaders());
if (associated_url.GetOrigin() != gurl.GetOrigin()) {
EnqueueResetStreamFrame(
stream_id,
request_priority,
RST_STREAM_REFUSED_STREAM,
base::StringPrintf("Rejected Cross Origin Push Stream %d",
associated_stream_id));
return false;
}
}
// There should not be an existing pushed stream with the same path.
PushedStreamMap::iterator pushed_it =
unclaimed_pushed_streams_.lower_bound(gurl);
if (pushed_it != unclaimed_pushed_streams_.end() &&
pushed_it->first == gurl) {
EnqueueResetStreamFrame(
stream_id,
request_priority,
RST_STREAM_PROTOCOL_ERROR,
"Received duplicate pushed stream with url: " + gurl.spec());
return false;
}
scoped_ptr<SpdyStream> stream(new SpdyStream(SPDY_PUSH_STREAM,
GetWeakPtr(),
gurl,
request_priority,
stream_initial_send_window_size_,
stream_initial_recv_window_size_,
net_log_));
stream->set_stream_id(stream_id);
// In spdy4/http2 PUSH_PROMISE arrives on associated stream.
if (associated_it != active_streams_.end() && GetProtocolVersion() >= SPDY4) {
associated_it->second.stream->IncrementRawReceivedBytes(
last_compressed_frame_len_);
} else {
stream->IncrementRawReceivedBytes(last_compressed_frame_len_);
}
last_compressed_frame_len_ = 0;
DeleteExpiredPushedStreams();
PushedStreamMap::iterator inserted_pushed_it =
unclaimed_pushed_streams_.insert(
pushed_it,
std::make_pair(gurl, PushedStreamInfo(stream_id, time_func_())));
DCHECK(inserted_pushed_it != pushed_it);
InsertActivatedStream(stream.Pass());
ActiveStreamMap::iterator active_it = active_streams_.find(stream_id);
if (active_it == active_streams_.end()) {
NOTREACHED();
return false;
}
active_it->second.stream->OnPushPromiseHeadersReceived(headers);
DCHECK(active_it->second.stream->IsReservedRemote());
num_pushed_streams_++;
return true;
}
void SpdySession::OnPushPromise(SpdyStreamId stream_id,
SpdyStreamId promised_stream_id,
const SpdyHeaderBlock& headers) {
CHECK(in_io_loop_);
if (net_log_.IsLogging()) {
net_log_.AddEvent(NetLog::TYPE_SPDY_SESSION_RECV_PUSH_PROMISE,
base::Bind(&NetLogSpdyPushPromiseReceivedCallback,
&headers,
stream_id,
promised_stream_id));
}
// Any priority will do.
// TODO(baranovich): pass parent stream id priority?
if (!TryCreatePushStream(promised_stream_id, stream_id, 0, headers))
return;
base::StatsCounter push_requests("spdy.pushed_streams");
push_requests.Increment();
}
void SpdySession::SendStreamWindowUpdate(SpdyStreamId stream_id,
uint32 delta_window_size) {
CHECK_GE(flow_control_state_, FLOW_CONTROL_STREAM);
ActiveStreamMap::const_iterator it = active_streams_.find(stream_id);
CHECK(it != active_streams_.end());
CHECK_EQ(it->second.stream->stream_id(), stream_id);
SendWindowUpdateFrame(
stream_id, delta_window_size, it->second.stream->priority());
}
void SpdySession::SendInitialData() {
DCHECK(enable_sending_initial_data_);
if (send_connection_header_prefix_) {
DCHECK_EQ(protocol_, kProtoSPDY4);
scoped_ptr<SpdyFrame> connection_header_prefix_frame(
new SpdyFrame(const_cast<char*>(kHttp2ConnectionHeaderPrefix),
kHttp2ConnectionHeaderPrefixSize,
false /* take_ownership */));
// Count the prefix as part of the subsequent SETTINGS frame.
EnqueueSessionWrite(HIGHEST, SETTINGS,
connection_header_prefix_frame.Pass());
}
// First, notify the server about the settings they should use when
// communicating with us.
SettingsMap settings_map;
// Create a new settings frame notifying the server of our
// max concurrent streams and initial window size.
settings_map[SETTINGS_MAX_CONCURRENT_STREAMS] =
SettingsFlagsAndValue(SETTINGS_FLAG_NONE, kMaxConcurrentPushedStreams);
if (flow_control_state_ >= FLOW_CONTROL_STREAM &&
stream_initial_recv_window_size_ != kSpdyStreamInitialWindowSize) {
settings_map[SETTINGS_INITIAL_WINDOW_SIZE] =
SettingsFlagsAndValue(SETTINGS_FLAG_NONE,
stream_initial_recv_window_size_);
}
SendSettings(settings_map);
// Next, notify the server about our initial recv window size.
if (flow_control_state_ == FLOW_CONTROL_STREAM_AND_SESSION) {
// Bump up the receive window size to the real initial value. This
// has to go here since the WINDOW_UPDATE frame sent by
// IncreaseRecvWindowSize() call uses |buffered_spdy_framer_|.
DCHECK_GT(kDefaultInitialRecvWindowSize, session_recv_window_size_);
// This condition implies that |kDefaultInitialRecvWindowSize| -
// |session_recv_window_size_| doesn't overflow.
DCHECK_GT(session_recv_window_size_, 0);
IncreaseRecvWindowSize(
kDefaultInitialRecvWindowSize - session_recv_window_size_);
}
if (protocol_ <= kProtoSPDY31) {
// Finally, notify the server about the settings they have
// previously told us to use when communicating with them (after
// applying them).
const SettingsMap& server_settings_map =
http_server_properties_->GetSpdySettings(host_port_pair());
if (server_settings_map.empty())
return;
SettingsMap::const_iterator it =
server_settings_map.find(SETTINGS_CURRENT_CWND);
uint32 cwnd = (it != server_settings_map.end()) ? it->second.second : 0;
UMA_HISTOGRAM_CUSTOM_COUNTS("Net.SpdySettingsCwndSent", cwnd, 1, 200, 100);
for (SettingsMap::const_iterator it = server_settings_map.begin();
it != server_settings_map.end(); ++it) {
const SpdySettingsIds new_id = it->first;
const uint32 new_val = it->second.second;
HandleSetting(new_id, new_val);
}
SendSettings(server_settings_map);
}
}
void SpdySession::SendSettings(const SettingsMap& settings) {
const SpdyMajorVersion protocol_version = GetProtocolVersion();
net_log_.AddEvent(
NetLog::TYPE_SPDY_SESSION_SEND_SETTINGS,
base::Bind(&NetLogSpdySendSettingsCallback, &settings, protocol_version));
// Create the SETTINGS frame and send it.
DCHECK(buffered_spdy_framer_.get());
scoped_ptr<SpdyFrame> settings_frame(
buffered_spdy_framer_->CreateSettings(settings));
sent_settings_ = true;
EnqueueSessionWrite(HIGHEST, SETTINGS, settings_frame.Pass());
}
void SpdySession::HandleSetting(uint32 id, uint32 value) {
switch (id) {
case SETTINGS_MAX_CONCURRENT_STREAMS:
max_concurrent_streams_ = std::min(static_cast<size_t>(value),
kMaxConcurrentStreamLimit);
ProcessPendingStreamRequests();
break;
case SETTINGS_INITIAL_WINDOW_SIZE: {
if (flow_control_state_ < FLOW_CONTROL_STREAM) {
net_log().AddEvent(
NetLog::TYPE_SPDY_SESSION_INITIAL_WINDOW_SIZE_NO_FLOW_CONTROL);
return;
}
if (value > static_cast<uint32>(kint32max)) {
net_log().AddEvent(
NetLog::TYPE_SPDY_SESSION_INITIAL_WINDOW_SIZE_OUT_OF_RANGE,
NetLog::IntegerCallback("initial_window_size", value));
return;
}
// SETTINGS_INITIAL_WINDOW_SIZE updates initial_send_window_size_ only.
int32 delta_window_size =
static_cast<int32>(value) - stream_initial_send_window_size_;
stream_initial_send_window_size_ = static_cast<int32>(value);
UpdateStreamsSendWindowSize(delta_window_size);
net_log().AddEvent(
NetLog::TYPE_SPDY_SESSION_UPDATE_STREAMS_SEND_WINDOW_SIZE,
NetLog::IntegerCallback("delta_window_size", delta_window_size));
break;
}
}
}
void SpdySession::UpdateStreamsSendWindowSize(int32 delta_window_size) {
DCHECK_GE(flow_control_state_, FLOW_CONTROL_STREAM);
for (ActiveStreamMap::iterator it = active_streams_.begin();
it != active_streams_.end(); ++it) {
it->second.stream->AdjustSendWindowSize(delta_window_size);
}
for (CreatedStreamSet::const_iterator it = created_streams_.begin();
it != created_streams_.end(); it++) {
(*it)->AdjustSendWindowSize(delta_window_size);
}
}
void SpdySession::SendPrefacePingIfNoneInFlight() {
if (pings_in_flight_ || !enable_ping_based_connection_checking_)
return;
base::TimeTicks now = time_func_();
// If there is no activity in the session, then send a preface-PING.
if ((now - last_activity_time_) > connection_at_risk_of_loss_time_)
SendPrefacePing();
}
void SpdySession::SendPrefacePing() {
WritePingFrame(next_ping_id_, false);
}
void SpdySession::SendWindowUpdateFrame(SpdyStreamId stream_id,
uint32 delta_window_size,
RequestPriority priority) {
CHECK_GE(flow_control_state_, FLOW_CONTROL_STREAM);
ActiveStreamMap::const_iterator it = active_streams_.find(stream_id);
if (it != active_streams_.end()) {
CHECK_EQ(it->second.stream->stream_id(), stream_id);
} else {
CHECK_EQ(flow_control_state_, FLOW_CONTROL_STREAM_AND_SESSION);
CHECK_EQ(stream_id, kSessionFlowControlStreamId);
}
net_log_.AddEvent(
NetLog::TYPE_SPDY_SESSION_SENT_WINDOW_UPDATE_FRAME,
base::Bind(&NetLogSpdyWindowUpdateFrameCallback,
stream_id, delta_window_size));
DCHECK(buffered_spdy_framer_.get());
scoped_ptr<SpdyFrame> window_update_frame(
buffered_spdy_framer_->CreateWindowUpdate(stream_id, delta_window_size));
EnqueueSessionWrite(priority, WINDOW_UPDATE, window_update_frame.Pass());
}
void SpdySession::WritePingFrame(uint32 unique_id, bool is_ack) {
DCHECK(buffered_spdy_framer_.get());
scoped_ptr<SpdyFrame> ping_frame(
buffered_spdy_framer_->CreatePingFrame(unique_id, is_ack));
EnqueueSessionWrite(HIGHEST, PING, ping_frame.Pass());
if (net_log().IsLogging()) {
net_log().AddEvent(
NetLog::TYPE_SPDY_SESSION_PING,
base::Bind(&NetLogSpdyPingCallback, unique_id, is_ack, "sent"));
}
if (!is_ack) {
next_ping_id_ += 2;
++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::MessageLoop::current()->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_);
// Check if we got a response back for all PINGs we had sent.
if (pings_in_flight_ == 0) {
check_ping_status_pending_ = false;
return;
}
DCHECK(check_ping_status_pending_);
base::TimeTicks now = time_func_();
base::TimeDelta delay = hung_interval_ - (now - last_activity_time_);
if (delay.InMilliseconds() < 0 || last_activity_time_ < last_check_time) {
// Track all failed PING messages in a separate bucket.
RecordPingRTTHistogram(base::TimeDelta::Max());
DoDrainSession(ERR_SPDY_PING_FAILED, "Failed ping.");
return;
}
// Check the status of connection after a delay.
base::MessageLoop::current()->PostDelayedTask(
FROM_HERE,
base::Bind(&SpdySession::CheckPingStatus, weak_factory_.GetWeakPtr(),
now),
delay);
}
void SpdySession::RecordPingRTTHistogram(base::TimeDelta duration) {
UMA_HISTOGRAM_TIMES("Net.SpdyPing.RTT", duration);
}
void SpdySession::RecordProtocolErrorHistogram(
SpdyProtocolErrorDetails details) {
UMA_HISTOGRAM_ENUMERATION("Net.SpdySessionErrorDetails2", details,
NUM_SPDY_PROTOCOL_ERROR_DETAILS);
if (EndsWith(host_port_pair().host(), "google.com", false)) {
UMA_HISTOGRAM_ENUMERATION("Net.SpdySessionErrorDetails_Google2", details,
NUM_SPDY_PROTOCOL_ERROR_DETAILS);
}
}
void SpdySession::RecordHistograms() {
UMA_HISTOGRAM_CUSTOM_COUNTS("Net.SpdyStreamsPerSession",
streams_initiated_count_,
0, 300, 50);
UMA_HISTOGRAM_CUSTOM_COUNTS("Net.SpdyStreamsPushedPerSession",
streams_pushed_count_,
0, 300, 50);
UMA_HISTOGRAM_CUSTOM_COUNTS("Net.SpdyStreamsPushedAndClaimedPerSession",
streams_pushed_and_claimed_count_,
0, 300, 50);
UMA_HISTOGRAM_CUSTOM_COUNTS("Net.SpdyStreamsAbandonedPerSession",
streams_abandoned_count_,
0, 300, 50);
UMA_HISTOGRAM_ENUMERATION("Net.SpdySettingsSent",
sent_settings_ ? 1 : 0, 2);
UMA_HISTOGRAM_ENUMERATION("Net.SpdySettingsReceived",
received_settings_ ? 1 : 0, 2);
UMA_HISTOGRAM_CUSTOM_COUNTS("Net.SpdyStreamStallsPerSession",
stalled_streams_,
0, 300, 50);
UMA_HISTOGRAM_ENUMERATION("Net.SpdySessionsWithStalls",
stalled_streams_ > 0 ? 1 : 0, 2);
if (received_settings_) {
// Enumerate the saved settings, and set histograms for it.
const SettingsMap& settings_map =
http_server_properties_->GetSpdySettings(host_port_pair());
SettingsMap::const_iterator it;
for (it = settings_map.begin(); it != settings_map.end(); ++it) {
const SpdySettingsIds id = it->first;
const uint32 val = it->second.second;
switch (id) {
case SETTINGS_CURRENT_CWND:
// Record several different histograms to see if cwnd converges
// for larger volumes of data being sent.
UMA_HISTOGRAM_CUSTOM_COUNTS("Net.SpdySettingsCwnd",
val, 1, 200, 100);
if (total_bytes_received_ > 10 * 1024) {
UMA_HISTOGRAM_CUSTOM_COUNTS("Net.SpdySettingsCwnd10K",
val, 1, 200, 100);
if (total_bytes_received_ > 25 * 1024) {
UMA_HISTOGRAM_CUSTOM_COUNTS("Net.SpdySettingsCwnd25K",
val, 1, 200, 100);
if (total_bytes_received_ > 50 * 1024) {
UMA_HISTOGRAM_CUSTOM_COUNTS("Net.SpdySettingsCwnd50K",
val, 1, 200, 100);
if (total_bytes_received_ > 100 * 1024) {
UMA_HISTOGRAM_CUSTOM_COUNTS("Net.SpdySettingsCwnd100K",
val, 1, 200, 100);
}
}
}
}
break;
case SETTINGS_ROUND_TRIP_TIME:
UMA_HISTOGRAM_CUSTOM_COUNTS("Net.SpdySettingsRTT",
val, 1, 1200, 100);
break;
case SETTINGS_DOWNLOAD_RETRANS_RATE:
UMA_HISTOGRAM_CUSTOM_COUNTS("Net.SpdySettingsRetransRate",
val, 1, 100, 50);
break;
default:
break;
}
}
}
}
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);
}
}
SSLClientSocket* SpdySession::GetSSLClientSocket() const {
if (!is_secure_)
return NULL;
SSLClientSocket* ssl_socket =
reinterpret_cast<SSLClientSocket*>(connection_->socket());
DCHECK(ssl_socket);
return ssl_socket;
}
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).
DCHECK_EQ(flow_control_state_, FLOW_CONTROL_STREAM_AND_SESSION);
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.)
size_t remaining_payload_bytes = std::min(consume_size, frame_payload_size);
DCHECK_GT(remaining_payload_bytes, 0u);
IncreaseSendWindowSize(static_cast<int32>(remaining_payload_bytes));
}
// For consumed bytes, the send window is increased when we receive
// a WINDOW_UPDATE frame.
}
void SpdySession::IncreaseSendWindowSize(int32 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_EQ(flow_control_state_, FLOW_CONTROL_STREAM_AND_SESSION);
DCHECK_GE(delta_window_size, 1);
// Check for overflow.
int32 max_delta_window_size = kint32max - 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(
NetLog::TYPE_SPDY_SESSION_UPDATE_SEND_WINDOW,
base::Bind(&NetLogSpdySessionWindowUpdateCallback,
delta_window_size, session_send_window_size_));
DCHECK(!IsSendStalled());
ResumeSendStalledStreams();
}
void SpdySession::DecreaseSendWindowSize(int32 delta_window_size) {
DCHECK_EQ(flow_control_state_, FLOW_CONTROL_STREAM_AND_SESSION);
// 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(
NetLog::TYPE_SPDY_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_EQ(flow_control_state_, FLOW_CONTROL_STREAM_AND_SESSION);
DCHECK_GE(consume_size, 1u);
DCHECK_LE(consume_size, static_cast<size_t>(kint32max));
IncreaseRecvWindowSize(static_cast<int32>(consume_size));
}
void SpdySession::IncreaseRecvWindowSize(int32 delta_window_size) {
DCHECK_EQ(flow_control_state_, FLOW_CONTROL_STREAM_AND_SESSION);
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, kint32max - session_recv_window_size_);
session_recv_window_size_ += delta_window_size;
net_log_.AddEvent(
NetLog::TYPE_SPDY_STREAM_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_ > kSpdySessionInitialWindowSize / 2) {
SendWindowUpdateFrame(kSessionFlowControlStreamId,
session_unacked_recv_window_bytes_,
HIGHEST);
session_unacked_recv_window_bytes_ = 0;
}
}
void SpdySession::DecreaseRecvWindowSize(int32 delta_window_size) {
CHECK(in_io_loop_);
DCHECK_EQ(flow_control_state_, FLOW_CONTROL_STREAM_AND_SESSION);
DCHECK_GE(delta_window_size, 1);
// Since we never decrease the initial receive window size,
// |delta_window_size| should never cause |recv_window_size_| to go
// negative. If we do, the receive window isn't being respected.
if (delta_window_size > session_recv_window_size_) {
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(
NetLog::TYPE_SPDY_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());
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() {
DCHECK_EQ(flow_control_state_, FLOW_CONTROL_STREAM_AND_SESSION);
// 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.
while (!IsSendStalled()) {
size_t old_size = 0;
#if DCHECK_IS_ON
old_size = GetTotalSize(stream_send_unstall_queue_);
#endif
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())
it->second.stream->PossiblyResumeIfSendStalled();
// The size should decrease unless we got send-stalled again.
if (!IsSendStalled())
DCHECK_LT(GetTotalSize(stream_send_unstall_queue_), old_size);
}
}
SpdyStreamId SpdySession::PopStreamToPossiblyResume() {
for (int i = MAXIMUM_PRIORITY; i >= MINIMUM_PRIORITY; --i) {
std::deque<SpdyStreamId>* queue = &stream_send_unstall_queue_[i];
if (!queue->empty()) {
SpdyStreamId stream_id = queue->front();
queue->pop_front();
return stream_id;
}
}
return 0;
}
} // namespace net