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// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "services/network/tcp_bound_socket.h"
#include <optional>
#include <utility>
#include "base/check.h"
#include "base/functional/bind.h"
#include "base/notreached.h"
#include "base/numerics/safe_conversions.h"
#include "net/base/ip_endpoint.h"
#include "net/base/net_errors.h"
#include "net/log/net_log.h"
#include "net/socket/tcp_client_socket.h"
#include "net/socket/tcp_server_socket.h"
#include "net/socket/tcp_socket.h"
#include "services/network/socket_factory.h"
#include "services/network/tcp_connected_socket.h"
namespace network {
TCPBoundSocket::TCPBoundSocket(
SocketFactory* socket_factory,
net::NetLog* net_log,
const net::NetworkTrafficAnnotationTag& traffic_annotation)
: socket_factory_(socket_factory),
socket_(net::TCPSocket::Create(nullptr /*socket_performance_watcher*/,
net_log,
net::NetLogSource())),
traffic_annotation_(traffic_annotation) {}
TCPBoundSocket::~TCPBoundSocket() = default;
int TCPBoundSocket::Bind(const net::IPEndPoint& local_addr,
net::IPEndPoint* local_addr_out) {
bind_address_ = local_addr;
int result = socket_->Open(local_addr.GetFamily());
if (result != net::OK)
return result;
// This is primarily intended for use with server sockets.
result = socket_->SetDefaultOptionsForServer();
if (result != net::OK)
return result;
result = socket_->Bind(local_addr);
if (result != net::OK)
return result;
return socket_->GetLocalAddress(local_addr_out);
}
void TCPBoundSocket::Listen(
uint32_t backlog,
mojo::PendingReceiver<mojom::TCPServerSocket> receiver,
ListenCallback callback) {
DCHECK(socket_->IsValid());
if (!socket_) {
NOTREACHED();
}
int result = ListenInternal(backlog);
// Succeed or fail, pass the result back to the caller.
std::move(callback).Run(result);
// Tear down everything on error.
if (result != net::OK) {
socket_factory_->DestroyBoundSocket(receiver_id_);
return;
}
// On success, also set up the TCPServerSocket.
std::unique_ptr<TCPServerSocket> server_socket =
std::make_unique<TCPServerSocket>(
std::make_unique<net::TCPServerSocket>(std::move(socket_)), backlog,
socket_factory_, traffic_annotation_);
socket_factory_->OnBoundSocketListening(
receiver_id_, std::move(server_socket), std::move(receiver));
// The above call will have destroyed |this|.
}
void TCPBoundSocket::Connect(
const net::AddressList& remote_addr_list,
mojom::TCPConnectedSocketOptionsPtr tcp_connected_socket_options,
mojo::PendingReceiver<mojom::TCPConnectedSocket> receiver,
mojo::PendingRemote<mojom::SocketObserver> observer,
ConnectCallback callback) {
DCHECK(socket_->IsValid());
if (!socket_) {
NOTREACHED();
}
DCHECK(!connect_callback_);
DCHECK(!connected_socket_receiver_);
DCHECK(!connecting_socket_);
connected_socket_receiver_ = std::move(receiver);
connect_callback_ = std::move(callback);
// Create a TCPConnectedSocket and have it do the work of connecting and
// configuring the socket. This saves a bit of code, and reduces the number of
// tests this class needs, since it can rely on TCPConnectedSocket's tests for
// a lot of cases.
connecting_socket_ = std::make_unique<TCPConnectedSocket>(
std::move(observer), socket_->net_log().net_log(),
socket_factory_->tls_socket_factory(),
nullptr /* client_socket_factory */, traffic_annotation_);
connecting_socket_->ConnectWithSocket(
net::TCPClientSocket::CreateFromBoundSocket(
std::move(socket_), remote_addr_list, bind_address_, nullptr),
std::move(tcp_connected_socket_options),
base::BindOnce(&TCPBoundSocket::OnConnectComplete,
base::Unretained(this)));
}
void TCPBoundSocket::OnConnectComplete(
int result,
const std::optional<net::IPEndPoint>& local_addr,
const std::optional<net::IPEndPoint>& peer_addr,
mojo::ScopedDataPipeConsumerHandle receive_stream,
mojo::ScopedDataPipeProducerHandle send_stream) {
DCHECK(connecting_socket_);
DCHECK(connect_callback_);
std::move(connect_callback_)
.Run(result, local_addr, peer_addr, std::move(receive_stream),
std::move(send_stream));
if (result != net::OK) {
socket_factory_->DestroyBoundSocket(receiver_id_);
// The above call will have destroyed |this|.
return;
}
socket_factory_->OnBoundSocketConnected(
receiver_id_, std::move(connecting_socket_),
std::move(connected_socket_receiver_));
// The above call will have destroyed |this|.
}
int TCPBoundSocket::ListenInternal(int backlog) {
return socket_->Listen(backlog);
}
} // namespace network
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