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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/socket/socks_connect_job.h"
#include <memory>
#include <utility>
#include "base/bind.h"
#include "net/base/net_errors.h"
#include "net/log/net_log_source_type.h"
#include "net/log/net_log_with_source.h"
#include "net/socket/client_socket_factory.h"
#include "net/socket/client_socket_handle.h"
#include "net/socket/socks5_client_socket.h"
#include "net/socket/socks_client_socket.h"
#include "net/socket/transport_connect_job.h"
namespace net {
// SOCKSConnectJobs will time out if the SOCKS handshake takes longer than this.
static constexpr base::TimeDelta kSOCKSConnectJobTimeout =
base::TimeDelta::FromSeconds(30);
SOCKSSocketParams::SOCKSSocketParams(
scoped_refptr<TransportSocketParams> proxy_server_params,
bool socks_v5,
const HostPortPair& host_port_pair,
const NetworkIsolationKey& network_isolation_key,
const NetworkTrafficAnnotationTag& traffic_annotation)
: transport_params_(std::move(proxy_server_params)),
destination_(host_port_pair),
socks_v5_(socks_v5),
network_isolation_key_(network_isolation_key),
traffic_annotation_(traffic_annotation) {}
SOCKSSocketParams::~SOCKSSocketParams() = default;
SOCKSConnectJob::SOCKSConnectJob(
RequestPriority priority,
const SocketTag& socket_tag,
const CommonConnectJobParams* common_connect_job_params,
scoped_refptr<SOCKSSocketParams> socks_params,
ConnectJob::Delegate* delegate,
const NetLogWithSource* net_log)
: ConnectJob(priority,
socket_tag,
base::TimeDelta(),
common_connect_job_params,
delegate,
net_log,
NetLogSourceType::SOCKS_CONNECT_JOB,
NetLogEventType::SOCKS_CONNECT_JOB_CONNECT),
socks_params_(std::move(socks_params)) {}
SOCKSConnectJob::~SOCKSConnectJob() {
// In the case the job was canceled, need to delete nested job first to
// correctly order NetLog events.
transport_connect_job_.reset();
}
LoadState SOCKSConnectJob::GetLoadState() const {
switch (next_state_) {
case STATE_TRANSPORT_CONNECT:
return LOAD_STATE_IDLE;
case STATE_TRANSPORT_CONNECT_COMPLETE:
return transport_connect_job_->GetLoadState();
case STATE_SOCKS_CONNECT:
case STATE_SOCKS_CONNECT_COMPLETE:
return LOAD_STATE_CONNECTING;
default:
NOTREACHED();
return LOAD_STATE_IDLE;
}
}
bool SOCKSConnectJob::HasEstablishedConnection() const {
return next_state_ == STATE_SOCKS_CONNECT ||
next_state_ == STATE_SOCKS_CONNECT_COMPLETE;
}
ResolveErrorInfo SOCKSConnectJob::GetResolveErrorInfo() const {
return resolve_error_info_;
}
base::TimeDelta SOCKSConnectJob::HandshakeTimeoutForTesting() {
return kSOCKSConnectJobTimeout;
}
void SOCKSConnectJob::OnIOComplete(int result) {
int rv = DoLoop(result);
if (rv != ERR_IO_PENDING)
NotifyDelegateOfCompletion(rv); // Deletes |this|
}
void SOCKSConnectJob::OnConnectJobComplete(int result, ConnectJob* job) {
DCHECK(transport_connect_job_);
DCHECK_EQ(next_state_, STATE_TRANSPORT_CONNECT_COMPLETE);
OnIOComplete(result);
}
void SOCKSConnectJob::OnNeedsProxyAuth(
const HttpResponseInfo& response,
HttpAuthController* auth_controller,
base::OnceClosure restart_with_auth_callback,
ConnectJob* job) {
// A SOCKSConnectJob can't be on top of an HttpProxyConnectJob.
NOTREACHED();
}
int SOCKSConnectJob::DoLoop(int result) {
DCHECK_NE(next_state_, STATE_NONE);
int rv = result;
do {
State state = next_state_;
next_state_ = STATE_NONE;
switch (state) {
case STATE_TRANSPORT_CONNECT:
DCHECK_EQ(OK, rv);
rv = DoTransportConnect();
break;
case STATE_TRANSPORT_CONNECT_COMPLETE:
rv = DoTransportConnectComplete(rv);
break;
case STATE_SOCKS_CONNECT:
DCHECK_EQ(OK, rv);
rv = DoSOCKSConnect();
break;
case STATE_SOCKS_CONNECT_COMPLETE:
rv = DoSOCKSConnectComplete(rv);
break;
default:
NOTREACHED() << "bad state";
rv = ERR_FAILED;
break;
}
} while (rv != ERR_IO_PENDING && next_state_ != STATE_NONE);
return rv;
}
int SOCKSConnectJob::DoTransportConnect() {
DCHECK(!transport_connect_job_);
next_state_ = STATE_TRANSPORT_CONNECT_COMPLETE;
transport_connect_job_ = TransportConnectJob::CreateTransportConnectJob(
socks_params_->transport_params(), priority(), socket_tag(),
common_connect_job_params(), this, &net_log());
return transport_connect_job_->Connect();
}
int SOCKSConnectJob::DoTransportConnectComplete(int result) {
resolve_error_info_ = transport_connect_job_->GetResolveErrorInfo();
if (result != OK)
return ERR_PROXY_CONNECTION_FAILED;
// Start the timer to time allowed for SOCKS handshake.
ResetTimer(kSOCKSConnectJobTimeout);
next_state_ = STATE_SOCKS_CONNECT;
return result;
}
int SOCKSConnectJob::DoSOCKSConnect() {
next_state_ = STATE_SOCKS_CONNECT_COMPLETE;
// Add a SOCKS connection on top of the tcp socket.
if (socks_params_->is_socks_v5()) {
socket_ = std::make_unique<SOCKS5ClientSocket>(
transport_connect_job_->PassSocket(), socks_params_->destination(),
socks_params_->traffic_annotation());
} else {
socks_socket_ptr_ = new SOCKSClientSocket(
transport_connect_job_->PassSocket(), socks_params_->destination(),
socks_params_->network_isolation_key(), priority(), host_resolver(),
socks_params_->transport_params()->secure_dns_policy(),
socks_params_->traffic_annotation());
socket_.reset(socks_socket_ptr_);
}
transport_connect_job_.reset();
return socket_->Connect(
base::BindOnce(&SOCKSConnectJob::OnIOComplete, base::Unretained(this)));
}
int SOCKSConnectJob::DoSOCKSConnectComplete(int result) {
if (!socks_params_->is_socks_v5())
resolve_error_info_ = socks_socket_ptr_->GetResolveErrorInfo();
if (result != OK) {
socket_->Disconnect();
return result;
}
SetSocket(std::move(socket_), absl::nullopt /* dns_aliases */);
return result;
}
int SOCKSConnectJob::ConnectInternal() {
next_state_ = STATE_TRANSPORT_CONNECT;
return DoLoop(OK);
}
void SOCKSConnectJob::ChangePriorityInternal(RequestPriority priority) {
// Currently doesn't change host resolution request priority for SOCKS4 case.
if (transport_connect_job_)
transport_connect_job_->ChangePriority(priority);
}
} // namespace net
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