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// Copyright (c) 2010 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 "remoting/host/heartbeat_sender.h"
#include "base/logging.h"
#include "base/message_loop.h"
#include "base/string_number_conversions.h"
#include "base/time.h"
#include "remoting/base/constants.h"
#include "remoting/host/host_config.h"
#include "remoting/jingle_glue/iq_request.h"
#include "remoting/jingle_glue/jingle_client.h"
#include "remoting/jingle_glue/jingle_thread.h"
#include "third_party/libjingle/source/talk/xmllite/xmlelement.h"
#include "third_party/libjingle/source/talk/xmpp/constants.h"
namespace remoting {
namespace {
const char kHeartbeatQueryTag[] = "heartbeat";
const char kHostIdAttr[] = "hostid";
const char kHeartbeatSignatureTag[] = "signature";
const char kSignatureTimeAttr[] = "time";
// TODO(sergeyu): Make this configurable by the cloud.
const int64 kHeartbeatPeriodMs = 5 * 60 * 1000; // 5 minutes.
}
HeartbeatSender::HeartbeatSender()
: state_(CREATED) {
}
HeartbeatSender::~HeartbeatSender() {
DCHECK(state_ == CREATED || state_ == INITIALIZED || state_ == STOPPED);
}
bool HeartbeatSender::Init(MutableHostConfig* config,
JingleClient* jingle_client) {
DCHECK(jingle_client);
DCHECK(state_ == CREATED);
jingle_client_ = jingle_client;
config_ = config;
if (!config_->GetString(kHostIdConfigPath, &host_id_)) {
LOG(ERROR) << "host_id is not defined in the config.";
return false;
}
if (!key_pair_.Load(config)) {
return false;
}
state_ = INITIALIZED;
return true;
}
void HeartbeatSender::Start() {
if (MessageLoop::current() != jingle_client_->message_loop()) {
jingle_client_->message_loop()->PostTask(
FROM_HERE, NewRunnableMethod(this, &HeartbeatSender::Start));
return;
}
DCHECK_EQ(INITIALIZED, state_);
state_ = STARTED;
request_.reset(jingle_client_->CreateIqRequest());
request_->set_callback(NewCallback(this, &HeartbeatSender::ProcessResponse));
jingle_client_->message_loop()->PostTask(
FROM_HERE, NewRunnableMethod(this, &HeartbeatSender::DoSendStanza));
}
void HeartbeatSender::Stop() {
if (MessageLoop::current() != jingle_client_->message_loop()) {
jingle_client_->message_loop()->PostTask(
FROM_HERE, NewRunnableMethod(this, &HeartbeatSender::Stop));
return;
}
// We may call Stop() even if we have not started.
if (state_ != STARTED)
return;
state_ = STOPPED;
request_.reset(NULL);
}
void HeartbeatSender::DoSendStanza() {
if (state_ == STARTED) {
// |jingle_client_| may be already destroyed if |state_| is set to
// |STOPPED|, so don't touch it here unless we are in |STARTED| state.
DCHECK(MessageLoop::current() == jingle_client_->message_loop());
LOG(INFO) << "Sending heartbeat stanza to " << kChromotingBotJid;
request_->SendIq(buzz::STR_SET, kChromotingBotJid,
CreateHeartbeatMessage());
// Schedule next heartbeat.
jingle_client_->message_loop()->PostDelayedTask(
FROM_HERE, NewRunnableMethod(this, &HeartbeatSender::DoSendStanza),
kHeartbeatPeriodMs);
}
}
void HeartbeatSender::ProcessResponse(const buzz::XmlElement* response) {
if (response->Attr(buzz::QN_TYPE) == buzz::STR_ERROR) {
LOG(ERROR) << "Received error in response to heartbeat: "
<< response->Str();
}
}
buzz::XmlElement* HeartbeatSender::CreateHeartbeatMessage() {
buzz::XmlElement* query = new buzz::XmlElement(
buzz::QName(kChromotingXmlNamespace, kHeartbeatQueryTag));
query->AddAttr(buzz::QName(kChromotingXmlNamespace, kHostIdAttr), host_id_);
query->AddElement(CreateSignature());
return query;
}
buzz::XmlElement* HeartbeatSender::CreateSignature() {
buzz::XmlElement* signature_tag = new buzz::XmlElement(
buzz::QName(kChromotingXmlNamespace, kHeartbeatSignatureTag));
int64 time = static_cast<int64>(base::Time::Now().ToDoubleT());
std::string time_str(base::Int64ToString(time));
signature_tag->AddAttr(
buzz::QName(kChromotingXmlNamespace, kSignatureTimeAttr), time_str);
std::string message = jingle_client_->GetFullJid() + ' ' + time_str;
std::string signature(key_pair_.GetSignature(message));
signature_tag->AddText(signature);
return signature_tag;
}
} // namespace remoting
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