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// Copyright 2014 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/websocket_transport_connect_sub_job.h"
#include "base/logging.h"
#include "net/base/ip_endpoint.h"
#include "net/base/net_errors.h"
#include "net/base/net_log.h"
#include "net/socket/client_socket_factory.h"
#include "net/socket/websocket_endpoint_lock_manager.h"
namespace net {
WebSocketTransportConnectSubJob::WebSocketTransportConnectSubJob(
const AddressList& addresses,
WebSocketTransportConnectJob* parent_job,
SubJobType type)
: parent_job_(parent_job),
addresses_(addresses),
current_address_index_(0),
next_state_(STATE_NONE),
type_(type) {}
WebSocketTransportConnectSubJob::~WebSocketTransportConnectSubJob() {
// We don't worry about cancelling the TCP connect, since ~StreamSocket will
// take care of it.
if (next()) {
DCHECK_EQ(STATE_OBTAIN_LOCK_COMPLETE, next_state_);
// The ~Waiter destructor will remove this object from the waiting list.
} else if (next_state_ == STATE_TRANSPORT_CONNECT_COMPLETE) {
WebSocketEndpointLockManager::GetInstance()->UnlockEndpoint(
CurrentAddress());
}
}
// Start connecting.
int WebSocketTransportConnectSubJob::Start() {
DCHECK_EQ(STATE_NONE, next_state_);
next_state_ = STATE_OBTAIN_LOCK;
return DoLoop(OK);
}
// Called by WebSocketEndpointLockManager when the lock becomes available.
void WebSocketTransportConnectSubJob::GotEndpointLock() {
DCHECK_EQ(STATE_OBTAIN_LOCK_COMPLETE, next_state_);
OnIOComplete(OK);
}
LoadState WebSocketTransportConnectSubJob::GetLoadState() const {
switch (next_state_) {
case STATE_OBTAIN_LOCK:
case STATE_OBTAIN_LOCK_COMPLETE:
// TODO(ricea): Add a WebSocket-specific LOAD_STATE ?
return LOAD_STATE_WAITING_FOR_AVAILABLE_SOCKET;
case STATE_TRANSPORT_CONNECT:
case STATE_TRANSPORT_CONNECT_COMPLETE:
case STATE_DONE:
return LOAD_STATE_CONNECTING;
case STATE_NONE:
return LOAD_STATE_IDLE;
}
NOTREACHED();
return LOAD_STATE_IDLE;
}
ClientSocketFactory* WebSocketTransportConnectSubJob::client_socket_factory()
const {
return parent_job_->helper_.client_socket_factory();
}
const BoundNetLog& WebSocketTransportConnectSubJob::net_log() const {
return parent_job_->net_log();
}
const IPEndPoint& WebSocketTransportConnectSubJob::CurrentAddress() const {
DCHECK_LT(current_address_index_, addresses_.size());
return addresses_[current_address_index_];
}
void WebSocketTransportConnectSubJob::OnIOComplete(int result) {
int rv = DoLoop(result);
if (rv != ERR_IO_PENDING)
parent_job_->OnSubJobComplete(rv, this); // |this| deleted
}
int WebSocketTransportConnectSubJob::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_OBTAIN_LOCK:
DCHECK_EQ(OK, rv);
rv = DoEndpointLock();
break;
case STATE_OBTAIN_LOCK_COMPLETE:
DCHECK_EQ(OK, rv);
rv = DoEndpointLockComplete();
break;
case STATE_TRANSPORT_CONNECT:
DCHECK_EQ(OK, rv);
rv = DoTransportConnect();
break;
case STATE_TRANSPORT_CONNECT_COMPLETE:
rv = DoTransportConnectComplete(rv);
break;
default:
NOTREACHED();
rv = ERR_FAILED;
break;
}
} while (rv != ERR_IO_PENDING && next_state_ != STATE_NONE &&
next_state_ != STATE_DONE);
return rv;
}
int WebSocketTransportConnectSubJob::DoEndpointLock() {
int rv = WebSocketEndpointLockManager::GetInstance()->LockEndpoint(
CurrentAddress(), this);
next_state_ = STATE_OBTAIN_LOCK_COMPLETE;
return rv;
}
int WebSocketTransportConnectSubJob::DoEndpointLockComplete() {
next_state_ = STATE_TRANSPORT_CONNECT;
return OK;
}
int WebSocketTransportConnectSubJob::DoTransportConnect() {
// TODO(ricea): Update global g_last_connect_time and report
// ConnectInterval.
next_state_ = STATE_TRANSPORT_CONNECT_COMPLETE;
AddressList one_address(CurrentAddress());
transport_socket_ = client_socket_factory()->CreateTransportClientSocket(
one_address, net_log().net_log(), net_log().source());
// This use of base::Unretained() is safe because transport_socket_ is
// destroyed in the destructor.
return transport_socket_->Connect(base::Bind(
&WebSocketTransportConnectSubJob::OnIOComplete, base::Unretained(this)));
}
int WebSocketTransportConnectSubJob::DoTransportConnectComplete(int result) {
next_state_ = STATE_DONE;
WebSocketEndpointLockManager* endpoint_lock_manager =
WebSocketEndpointLockManager::GetInstance();
if (result != OK) {
endpoint_lock_manager->UnlockEndpoint(CurrentAddress());
if (current_address_index_ + 1 < addresses_.size()) {
// Try falling back to the next address in the list.
next_state_ = STATE_OBTAIN_LOCK;
++current_address_index_;
result = OK;
}
return result;
}
endpoint_lock_manager->RememberSocket(transport_socket_.get(),
CurrentAddress());
return result;
}
} // namespace net
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