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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"
using buzz::QName;
using buzz::XmlElement;
namespace remoting {
namespace {
const char kHeartbeatQueryTag[] = "heartbeat";
const char kHostIdAttr[] = "hostid";
const char kHeartbeatSignatureTag[] = "signature";
const char kSignatureTimeAttr[] = "time";
const char kHeartbeatResultTag[] = "heartbeat-result";
const char kSetIntervalTag[] = "set-interval";
const int64 kDefaultHeartbeatIntervalMs = 5 * 60 * 1000; // 5 minutes.
}
HeartbeatSender::HeartbeatSender(MessageLoop* message_loop,
MutableHostConfig* config)
: state_(CREATED),
message_loop_(message_loop),
config_(config),
interval_ms_(kDefaultHeartbeatIntervalMs) {
DCHECK(config_);
}
HeartbeatSender::~HeartbeatSender() {
DCHECK(state_ == CREATED || state_ == INITIALIZED || state_ == STOPPED);
}
bool HeartbeatSender::Init() {
DCHECK(state_ == CREATED);
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::OnSignallingConnected(SignalStrategy* signal_strategy,
const std::string& full_jid) {
DCHECK_EQ(MessageLoop::current(), message_loop_);
DCHECK(state_ == INITIALIZED || state_ == STOPPED);
state_ = STARTED;
full_jid_ = full_jid;
request_.reset(signal_strategy->CreateIqRequest());
request_->set_callback(NewCallback(this, &HeartbeatSender::ProcessResponse));
DoSendStanza();
timer_.Start(base::TimeDelta::FromMilliseconds(interval_ms_), this,
&HeartbeatSender::DoSendStanza);
}
void HeartbeatSender::OnSignallingDisconnected() {
DCHECK_EQ(MessageLoop::current(), message_loop_);
DCHECK_EQ(state_, STARTED);
state_ = STOPPED;
request_.reset(NULL);
}
// Ignore any notifications other than signalling
// connected/disconnected events.
void HeartbeatSender::OnAccessDenied() { }
void HeartbeatSender::OnShutdown() { }
void HeartbeatSender::DoSendStanza() {
DCHECK_EQ(MessageLoop::current(), message_loop_);
DCHECK_EQ(state_, STARTED);
VLOG(1) << "Sending heartbeat stanza to " << kChromotingBotJid;
request_->SendIq(buzz::STR_SET, kChromotingBotJid, CreateHeartbeatMessage());
}
void HeartbeatSender::ProcessResponse(const XmlElement* response) {
DCHECK_EQ(MessageLoop::current(), message_loop_);
std::string type = response->Attr(buzz::QN_TYPE);
if (type == buzz::STR_ERROR) {
LOG(ERROR) << "Received error in response to heartbeat: "
<< response->Str();
return;
}
// This method must only be called for error or result stanzas.
DCHECK_EQ(buzz::STR_RESULT, type);
const XmlElement* result_element =
response->FirstNamed(QName(kChromotingXmlNamespace, kHeartbeatResultTag));
if (result_element) {
const XmlElement* set_interval_element =
result_element->FirstNamed(QName(kChromotingXmlNamespace,
kSetIntervalTag));
if (set_interval_element) {
const std::string& interval_str = set_interval_element->BodyText();
int interval;
if (!base::StringToInt(interval_str, &interval) || interval <= 0) {
LOG(ERROR) << "Received invalid set-interval: "
<< set_interval_element->Str();
} else {
SetInterval(interval * base::Time::kMillisecondsPerSecond);
}
}
}
}
void HeartbeatSender::SetInterval(int interval) {
if (interval != interval_ms_) {
interval_ms_ = interval;
// Restart the timer with the new interval.
if (state_ == STARTED) {
timer_.Stop();
timer_.Start(base::TimeDelta::FromMilliseconds(interval_ms_), this,
&HeartbeatSender::DoSendStanza);
}
}
}
XmlElement* HeartbeatSender::CreateHeartbeatMessage() {
XmlElement* query = new XmlElement(
QName(kChromotingXmlNamespace, kHeartbeatQueryTag));
query->AddAttr(QName(kChromotingXmlNamespace, kHostIdAttr), host_id_);
query->AddElement(CreateSignature());
return query;
}
XmlElement* HeartbeatSender::CreateSignature() {
XmlElement* signature_tag = new XmlElement(
QName(kChromotingXmlNamespace, kHeartbeatSignatureTag));
int64 time = static_cast<int64>(base::Time::Now().ToDoubleT());
std::string time_str(base::Int64ToString(time));
signature_tag->AddAttr(
QName(kChromotingXmlNamespace, kSignatureTimeAttr), time_str);
std::string message = full_jid_ + ' ' + time_str;
std::string signature(key_pair_.GetSignature(message));
signature_tag->AddText(signature);
return signature_tag;
}
} // namespace remoting
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