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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_client.h"
#include <errno.h>
#include <netinet/in.h>
#include <string.h>
#include <sys/epoll.h>
#include <sys/socket.h>
#include <unistd.h>
#include "base/run_loop.h"
#include "net/base/sockaddr_storage.h"
#include "net/quic/core/crypto/quic_random.h"
#include "net/quic/core/quic_connection.h"
#include "net/quic/core/quic_data_reader.h"
#include "net/quic/core/quic_flags.h"
#include "net/quic/core/quic_packets.h"
#include "net/quic/core/quic_server_id.h"
#include "net/quic/core/spdy_utils.h"
#include "net/quic/platform/api/quic_bug_tracker.h"
#include "net/quic/platform/api/quic_logging.h"
#include "net/tools/quic/platform/impl/quic_socket_utils.h"
#include "net/tools/quic/quic_epoll_alarm_factory.h"
#include "net/tools/quic/quic_epoll_connection_helper.h"
#ifndef SO_RXQ_OVFL
#define SO_RXQ_OVFL 40
#endif
// TODO(rtenneti): Add support for MMSG_MORE.
#define MMSG_MORE 0
using base::StringPiece;
using std::string;
namespace net {
const int kEpollFlags = EPOLLIN | EPOLLOUT | EPOLLET;
QuicClient::QuicClient(QuicSocketAddress server_address,
const QuicServerId& server_id,
const QuicVersionVector& supported_versions,
EpollServer* epoll_server,
std::unique_ptr<ProofVerifier> proof_verifier)
: QuicClient(server_address,
server_id,
supported_versions,
QuicConfig(),
epoll_server,
std::move(proof_verifier)) {}
QuicClient::QuicClient(QuicSocketAddress server_address,
const QuicServerId& server_id,
const QuicVersionVector& supported_versions,
const QuicConfig& config,
EpollServer* epoll_server,
std::unique_ptr<ProofVerifier> proof_verifier)
: QuicClientBase(
server_id,
supported_versions,
config,
new QuicEpollConnectionHelper(epoll_server, QuicAllocator::SIMPLE),
new QuicEpollAlarmFactory(epoll_server),
std::move(proof_verifier)),
epoll_server_(epoll_server),
packets_dropped_(0),
overflow_supported_(false),
packet_reader_(new QuicPacketReader()) {
set_server_address(server_address);
}
QuicClient::~QuicClient() {
if (connected()) {
session()->connection()->CloseConnection(
QUIC_PEER_GOING_AWAY, "Client being torn down",
ConnectionCloseBehavior::SEND_CONNECTION_CLOSE_PACKET);
}
CleanUpAllUDPSockets();
}
bool QuicClient::CreateUDPSocketAndBind(QuicSocketAddress server_address,
QuicIpAddress bind_to_address,
int bind_to_port) {
epoll_server_->set_timeout_in_us(50 * 1000);
int fd =
QuicSocketUtils::CreateUDPSocket(server_address, &overflow_supported_);
if (fd < 0) {
return false;
}
QuicSocketAddress client_address;
if (bind_to_address.IsInitialized()) {
client_address = QuicSocketAddress(bind_to_address, local_port());
} else if (server_address.host().address_family() == IpAddressFamily::IP_V4) {
client_address = QuicSocketAddress(QuicIpAddress::Any4(), bind_to_port);
} else {
client_address = QuicSocketAddress(QuicIpAddress::Any6(), bind_to_port);
}
sockaddr_storage addr = client_address.generic_address();
int rc = bind(fd, reinterpret_cast<sockaddr*>(&addr), sizeof(addr));
if (rc < 0) {
QUIC_LOG(ERROR) << "Bind failed: " << strerror(errno);
return false;
}
if (client_address.FromSocket(fd) != 0) {
QUIC_LOG(ERROR) << "Unable to get self address. Error: "
<< strerror(errno);
}
fd_address_map_[fd] = client_address;
epoll_server_->RegisterFD(fd, this, kEpollFlags);
return true;
}
void QuicClient::CleanUpUDPSocket(int fd) {
CleanUpUDPSocketImpl(fd);
fd_address_map_.erase(fd);
}
void QuicClient::CleanUpAllUDPSockets() {
for (std::pair<int, QuicSocketAddress> fd_address : fd_address_map_) {
CleanUpUDPSocketImpl(fd_address.first);
}
fd_address_map_.clear();
}
void QuicClient::CleanUpUDPSocketImpl(int fd) {
if (fd > -1) {
epoll_server_->UnregisterFD(fd);
int rc = close(fd);
DCHECK_EQ(0, rc);
}
}
void QuicClient::RunEventLoop() {
base::RunLoop().RunUntilIdle();
epoll_server_->WaitForEventsAndExecuteCallbacks();
}
void QuicClient::OnEvent(int fd, EpollEvent* event) {
DCHECK_EQ(fd, GetLatestFD());
if (event->in_events & EPOLLIN) {
bool more_to_read = true;
while (connected() && more_to_read) {
more_to_read = packet_reader_->ReadAndDispatchPackets(
GetLatestFD(), QuicClient::GetLatestClientAddress().port(),
*helper()->GetClock(), this,
overflow_supported_ ? &packets_dropped_ : nullptr);
}
}
if (connected() && (event->in_events & EPOLLOUT)) {
writer()->SetWritable();
session()->connection()->OnCanWrite();
}
if (event->in_events & EPOLLERR) {
QUIC_DLOG(INFO) << "Epollerr";
}
}
QuicPacketWriter* QuicClient::CreateQuicPacketWriter() {
return new QuicDefaultPacketWriter(GetLatestFD());
}
QuicSocketAddress QuicClient::GetLatestClientAddress() const {
if (fd_address_map_.empty()) {
return QuicSocketAddress();
}
return fd_address_map_.back().second;
}
int QuicClient::GetLatestFD() const {
if (fd_address_map_.empty()) {
return -1;
}
return fd_address_map_.back().first;
}
void QuicClient::ProcessPacket(const QuicSocketAddress& self_address,
const QuicSocketAddress& peer_address,
const QuicReceivedPacket& packet) {
session()->ProcessUdpPacket(self_address, peer_address, packet);
}
} // namespace net
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