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// Copyright (c) 2011 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/register_support_host_request.h"
#include "base/bind.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_thread.h"
#include "remoting/jingle_glue/signal_strategy.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 {
// Strings used in the request message we send to the bot.
const char kRegisterQueryTag[] = "register-support-host";
const char kPublicKeyTag[] = "public-key";
const char kSignatureTag[] = "signature";
const char kSignatureTimeAttr[] = "time";
// Strings used to parse responses received from the bot.
const char kRegisterQueryResultTag[] = "register-support-host-result";
const char kSupportIdTag[] = "support-id";
const char kSupportIdLifetimeTag[] = "support-id-lifetime";
}
RegisterSupportHostRequest::RegisterSupportHostRequest()
: message_loop_(NULL) {
}
RegisterSupportHostRequest::~RegisterSupportHostRequest() {
}
bool RegisterSupportHostRequest::Init(HostConfig* config,
const RegisterCallback& callback) {
callback_ = callback;
if (!key_pair_.Load(config)) {
return false;
}
return true;
}
void RegisterSupportHostRequest::OnSignallingConnected(
SignalStrategy* signal_strategy,
const std::string& jid) {
DCHECK(!callback_.is_null());
message_loop_ = MessageLoop::current();
request_.reset(signal_strategy->CreateIqRequest());
request_->set_callback(base::Bind(
&RegisterSupportHostRequest::ProcessResponse, base::Unretained(this)));
request_->SendIq(IqRequest::MakeIqStanza(
buzz::STR_SET, kChromotingBotJid, CreateRegistrationRequest(jid)));
}
void RegisterSupportHostRequest::OnSignallingDisconnected() {
if (!message_loop_) {
// We will reach here with |message_loop_| NULL if the Host's
// XMPP connection attempt fails.
CHECK(!callback_.is_null());
DCHECK(!request_.get());
callback_.Run(false, std::string(), base::TimeDelta());
return;
}
DCHECK_EQ(message_loop_, MessageLoop::current());
request_.reset();
}
// Ignore any notifications other than signalling
// connected/disconnected events.
void RegisterSupportHostRequest::OnAccessDenied() { }
void RegisterSupportHostRequest::OnClientAuthenticated(
remoting::protocol::ConnectionToClient* client) { }
void RegisterSupportHostRequest::OnClientDisconnected(
remoting::protocol::ConnectionToClient* client) { }
void RegisterSupportHostRequest::OnShutdown() { }
XmlElement* RegisterSupportHostRequest::CreateRegistrationRequest(
const std::string& jid) {
XmlElement* query = new XmlElement(
QName(kChromotingXmlNamespace, kRegisterQueryTag));
XmlElement* public_key = new XmlElement(
QName(kChromotingXmlNamespace, kPublicKeyTag));
public_key->AddText(key_pair_.GetPublicKey());
query->AddElement(public_key);
query->AddElement(CreateSignature(jid));
return query;
}
XmlElement* RegisterSupportHostRequest::CreateSignature(
const std::string& jid) {
XmlElement* signature_tag = new XmlElement(
QName(kChromotingXmlNamespace, kSignatureTag));
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 = jid + ' ' + time_str;
std::string signature(key_pair_.GetSignature(message));
signature_tag->AddText(signature);
return signature_tag;
}
bool RegisterSupportHostRequest::ParseResponse(const XmlElement* response,
std::string* support_id,
base::TimeDelta* lifetime) {
std::string type = response->Attr(buzz::QN_TYPE);
if (type == buzz::STR_ERROR) {
LOG(ERROR) << "Received error in response to heartbeat: "
<< response->Str();
return false;
}
// 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, kRegisterQueryResultTag));
if (!result_element) {
LOG(ERROR) << "<" << kRegisterQueryResultTag
<< "> is missing in the host registration response: "
<< response->Str();
return false;
}
const XmlElement* support_id_element =
result_element->FirstNamed(QName(kChromotingXmlNamespace, kSupportIdTag));
if (!support_id_element) {
LOG(ERROR) << "<" << kSupportIdTag
<< "> is missing in the host registration response: "
<< response->Str();
return false;
}
const XmlElement* lifetime_element =
result_element->FirstNamed(QName(kChromotingXmlNamespace,
kSupportIdLifetimeTag));
if (!lifetime_element) {
LOG(ERROR) << "<" << kSupportIdLifetimeTag
<< "> is missing in the host registration response: "
<< response->Str();
return false;
}
int lifetime_int;
if (!base::StringToInt(lifetime_element->BodyText().c_str(), &lifetime_int) ||
lifetime_int <= 0) {
LOG(ERROR) << "<" << kSupportIdLifetimeTag
<< "> is malformed in the host registration response: "
<< response->Str();
return false;
}
*support_id = support_id_element->BodyText();
*lifetime = base::TimeDelta::FromSeconds(lifetime_int);
return true;
}
void RegisterSupportHostRequest::ProcessResponse(const XmlElement* response) {
DCHECK_EQ(message_loop_, MessageLoop::current());
std::string support_id;
base::TimeDelta lifetime;
bool success = ParseResponse(response, &support_id, &lifetime);
callback_.Run(success, support_id, lifetime);
}
} // namespace remoting
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