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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "net/tools/quic/quic_simple_client.h"
#include "base/logging.h"
#include "base/run_loop.h"
#include "base/thread_task_runner_handle.h"
#include "net/base/net_errors.h"
#include "net/http/http_request_info.h"
#include "net/http/http_response_info.h"
#include "net/quic/crypto/quic_random.h"
#include "net/quic/quic_chromium_connection_helper.h"
#include "net/quic/quic_chromium_packet_reader.h"
#include "net/quic/quic_chromium_packet_writer.h"
#include "net/quic/quic_connection.h"
#include "net/quic/quic_flags.h"
#include "net/quic/quic_protocol.h"
#include "net/quic/quic_server_id.h"
#include "net/quic/spdy_utils.h"
#include "net/spdy/spdy_header_block.h"
#include "net/spdy/spdy_http_utils.h"
#include "net/udp/udp_client_socket.h"
using std::string;
using std::vector;
namespace net {
void QuicSimpleClient::ClientQuicDataToResend::Resend() {
client_->SendRequest(*headers_, body_, fin_);
delete headers_;
headers_ = nullptr;
}
QuicSimpleClient::QuicSimpleClient(IPEndPoint server_address,
const QuicServerId& server_id,
const QuicVersionVector& supported_versions,
ProofVerifier* proof_verifier)
: QuicClientBase(server_id,
supported_versions,
QuicConfig(),
CreateQuicConnectionHelper(),
proof_verifier),
server_address_(server_address),
local_port_(0),
initialized_(false),
packet_reader_started_(false),
weak_factory_(this) {}
QuicSimpleClient::QuicSimpleClient(IPEndPoint server_address,
const QuicServerId& server_id,
const QuicVersionVector& supported_versions,
const QuicConfig& config,
ProofVerifier* proof_verifier)
: QuicClientBase(server_id,
supported_versions,
config,
CreateQuicConnectionHelper(),
proof_verifier),
server_address_(server_address),
local_port_(0),
initialized_(false),
packet_reader_started_(false),
weak_factory_(this) {}
QuicSimpleClient::~QuicSimpleClient() {
if (connected()) {
session()->connection()->SendConnectionClosePacket(QUIC_PEER_GOING_AWAY,
"");
}
STLDeleteElements(&data_to_resend_on_connect_);
STLDeleteElements(&data_sent_before_handshake_);
}
bool QuicSimpleClient::Initialize() {
DCHECK(!initialized_);
QuicClientBase::Initialize();
if (!CreateUDPSocket()) {
return false;
}
initialized_ = true;
return true;
}
QuicSimpleClient::QuicDataToResend::QuicDataToResend(HttpRequestInfo* headers,
StringPiece body,
bool fin)
: headers_(headers), body_(body), fin_(fin) {}
QuicSimpleClient::QuicDataToResend::~QuicDataToResend() {
if (headers_) {
delete headers_;
}
}
bool QuicSimpleClient::CreateUDPSocket() {
scoped_ptr<UDPClientSocket> socket(
new UDPClientSocket(DatagramSocket::DEFAULT_BIND, RandIntCallback(),
&net_log_, NetLog::Source()));
int address_family = server_address_.GetSockAddrFamily();
if (bind_to_address_.size() != 0) {
client_address_ = IPEndPoint(bind_to_address_, local_port_);
} else if (address_family == AF_INET) {
client_address_ = IPEndPoint(IPAddress(0, 0, 0, 0), local_port_);
} else {
IPAddress any6;
CHECK(any6.AssignFromIPLiteral("::"));
client_address_ = IPEndPoint(any6, local_port_);
}
int rc = socket->Connect(server_address_);
if (rc != OK) {
LOG(ERROR) << "Connect failed: " << ErrorToShortString(rc);
return false;
}
rc = socket->SetReceiveBufferSize(kDefaultSocketReceiveBuffer);
if (rc != OK) {
LOG(ERROR) << "SetReceiveBufferSize() failed: " << ErrorToShortString(rc);
return false;
}
rc = socket->SetSendBufferSize(kDefaultSocketReceiveBuffer);
if (rc != OK) {
LOG(ERROR) << "SetSendBufferSize() failed: " << ErrorToShortString(rc);
return false;
}
rc = socket->GetLocalAddress(&client_address_);
if (rc != OK) {
LOG(ERROR) << "GetLocalAddress failed: " << ErrorToShortString(rc);
return false;
}
socket_.swap(socket);
packet_reader_.reset(new QuicChromiumPacketReader(
socket_.get(), &clock_, this, kQuicYieldAfterPacketsRead,
QuicTime::Delta::FromMilliseconds(kQuicYieldAfterDurationMilliseconds),
BoundNetLog()));
if (socket != nullptr) {
socket->Close();
}
return true;
}
void QuicSimpleClient::StartPacketReaderIfNotStarted() {
if (!packet_reader_started_) {
packet_reader_->StartReading();
packet_reader_started_ = true;
}
}
bool QuicSimpleClient::Connect() {
// Attempt multiple connects until the maximum number of client hellos have
// been sent.
while (!connected() &&
GetNumSentClientHellos() <= QuicCryptoClientStream::kMaxClientHellos) {
StartConnect();
StartPacketReaderIfNotStarted();
while (EncryptionBeingEstablished()) {
WaitForEvents();
}
if (FLAGS_enable_quic_stateless_reject_support && connected() &&
!data_to_resend_on_connect_.empty()) {
// A connection has been established and there was previously queued data
// to resend. Resend it and empty the queue.
for (QuicDataToResend* data : data_to_resend_on_connect_) {
data->Resend();
}
STLDeleteElements(&data_to_resend_on_connect_);
}
if (session() != nullptr &&
session()->error() != QUIC_CRYPTO_HANDSHAKE_STATELESS_REJECT) {
// We've successfully created a session but we're not connected, and there
// is no stateless reject to recover from. Give up trying.
break;
}
}
if (!connected() &&
GetNumSentClientHellos() > QuicCryptoClientStream::kMaxClientHellos &&
session() != nullptr &&
session()->error() == QUIC_CRYPTO_HANDSHAKE_STATELESS_REJECT) {
// The overall connection failed due too many stateless rejects.
set_connection_error(QUIC_CRYPTO_TOO_MANY_REJECTS);
}
return session()->connection()->connected();
}
void QuicSimpleClient::StartConnect() {
DCHECK(initialized_);
DCHECK(!connected());
set_writer(CreateQuicPacketWriter());
if (connected_or_attempting_connect()) {
// Before we destroy the last session and create a new one, gather its stats
// and update the stats for the overall connection.
UpdateStats();
if (session()->error() == QUIC_CRYPTO_HANDSHAKE_STATELESS_REJECT) {
// If the last error was due to a stateless reject, queue up the data to
// be resent on the next successful connection.
// TODO(jokulik): I'm a little bit concerned about ordering here. Maybe
// we should just maintain one queue?
DCHECK(data_to_resend_on_connect_.empty());
data_to_resend_on_connect_.swap(data_sent_before_handshake_);
}
}
CreateQuicClientSession(new QuicConnection(
GetNextConnectionId(), server_address_, helper(), writer(),
/* owns_writer= */ false, Perspective::IS_CLIENT, supported_versions()));
session()->Initialize();
session()->CryptoConnect();
set_connected_or_attempting_connect(true);
}
void QuicSimpleClient::Disconnect() {
DCHECK(initialized_);
if (connected()) {
session()->connection()->SendConnectionCloseWithDetails(
QUIC_PEER_GOING_AWAY, "Client disconnecting");
}
STLDeleteElements(&data_to_resend_on_connect_);
STLDeleteElements(&data_sent_before_handshake_);
reset_writer();
packet_reader_.reset();
initialized_ = false;
}
void QuicSimpleClient::SendRequest(const HttpRequestInfo& headers,
StringPiece body,
bool fin) {
QuicSpdyClientStream* stream = CreateReliableClientStream();
if (stream == nullptr) {
LOG(DFATAL) << "stream creation failed!";
return;
}
SpdyHeaderBlock header_block;
CreateSpdyHeadersFromHttpRequest(headers, headers.extra_headers, net::HTTP2,
true, &header_block);
stream->set_visitor(this);
stream->SendRequest(header_block, body, fin);
if (FLAGS_enable_quic_stateless_reject_support) {
// Record this in case we need to resend.
auto new_headers = new HttpRequestInfo;
*new_headers = headers;
auto data_to_resend =
new ClientQuicDataToResend(new_headers, body, fin, this);
MaybeAddQuicDataToResend(data_to_resend);
}
}
void QuicSimpleClient::MaybeAddQuicDataToResend(
QuicDataToResend* data_to_resend) {
DCHECK(FLAGS_enable_quic_stateless_reject_support);
if (session()->IsCryptoHandshakeConfirmed()) {
// The handshake is confirmed. No need to continue saving requests to
// resend.
STLDeleteElements(&data_sent_before_handshake_);
delete data_to_resend;
return;
}
// The handshake is not confirmed. Push the data onto the queue of data to
// resend if statelessly rejected.
data_sent_before_handshake_.push_back(data_to_resend);
}
void QuicSimpleClient::SendRequestAndWaitForResponse(
const HttpRequestInfo& request,
StringPiece body,
bool fin) {
SendRequest(request, body, fin);
while (WaitForEvents()) {
}
}
void QuicSimpleClient::SendRequestsAndWaitForResponse(
const base::CommandLine::StringVector& url_list) {
for (size_t i = 0; i < url_list.size(); ++i) {
HttpRequestInfo request;
request.method = "GET";
request.url = GURL(url_list[i]);
SendRequest(request, "", true);
}
while (WaitForEvents()) {
}
}
bool QuicSimpleClient::WaitForEvents() {
DCHECK(connected());
base::RunLoop().RunUntilIdle();
DCHECK(session() != nullptr);
if (!connected() &&
session()->error() == QUIC_CRYPTO_HANDSHAKE_STATELESS_REJECT) {
DCHECK(FLAGS_enable_quic_stateless_reject_support);
DVLOG(1) << "Detected stateless reject while waiting for events. "
<< "Attempting to reconnect.";
Connect();
}
return session()->num_active_requests() != 0;
}
bool QuicSimpleClient::MigrateSocket(const IPAddress& new_host) {
if (!connected()) {
return false;
}
bind_to_address_ = new_host;
if (!CreateUDPSocket()) {
return false;
}
session()->connection()->SetSelfAddress(client_address_);
QuicPacketWriter* writer = CreateQuicPacketWriter();
set_writer(writer);
session()->connection()->SetQuicPacketWriter(writer, false);
return true;
}
void QuicSimpleClient::OnClose(QuicSpdyStream* stream) {
DCHECK(stream != nullptr);
QuicSpdyClientStream* client_stream =
static_cast<QuicSpdyClientStream*>(stream);
HttpResponseInfo response;
SpdyHeadersToHttpResponse(client_stream->headers(), net::HTTP2, &response);
if (response_listener_.get() != nullptr) {
response_listener_->OnCompleteResponse(stream->id(), *response.headers,
client_stream->data());
}
// Store response headers and body.
if (store_response_) {
latest_response_code_ = client_stream->response_code();
response.headers->GetNormalizedHeaders(&latest_response_headers_);
latest_response_body_ = client_stream->data();
}
}
size_t QuicSimpleClient::latest_response_code() const {
LOG_IF(DFATAL, !store_response_) << "Response not stored!";
return latest_response_code_;
}
const string& QuicSimpleClient::latest_response_headers() const {
LOG_IF(DFATAL, !store_response_) << "Response not stored!";
return latest_response_headers_;
}
const string& QuicSimpleClient::latest_response_body() const {
LOG_IF(DFATAL, !store_response_) << "Response not stored!";
return latest_response_body_;
}
QuicConnectionId QuicSimpleClient::GenerateNewConnectionId() {
return helper()->GetRandomGenerator()->RandUint64();
}
QuicChromiumConnectionHelper* QuicSimpleClient::CreateQuicConnectionHelper() {
return new QuicChromiumConnectionHelper(
base::ThreadTaskRunnerHandle::Get().get(), &clock_,
QuicRandom::GetInstance());
}
QuicPacketWriter* QuicSimpleClient::CreateQuicPacketWriter() {
return new QuicChromiumPacketWriter(socket_.get());
}
void QuicSimpleClient::OnReadError(int result,
const DatagramClientSocket* socket) {
LOG(ERROR) << "QuicSimpleClient read failed: " << ErrorToShortString(result);
Disconnect();
}
bool QuicSimpleClient::OnPacket(const QuicEncryptedPacket& packet,
IPEndPoint local_address,
IPEndPoint peer_address) {
session()->connection()->ProcessUdpPacket(local_address, peer_address,
packet);
if (!session()->connection()->connected()) {
return false;
}
return true;
}
} // namespace net
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