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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 "components/cryptauth/connection.h"
#include <sstream>
#include <utility>
#include "base/logging.h"
#include "chromeos/components/proximity_auth/logging/logging.h"
#include "components/cryptauth/connection_observer.h"
#include "components/cryptauth/wire_message.h"
namespace cryptauth {
Connection::Connection(RemoteDeviceRef remote_device)
: remote_device_(remote_device),
status_(Status::DISCONNECTED),
is_sending_message_(false) {}
Connection::~Connection() {}
bool Connection::IsConnected() const {
return status_ == Status::CONNECTED;
}
void Connection::SendMessage(std::unique_ptr<WireMessage> message) {
if (!IsConnected()) {
PA_LOG(ERROR) << "Not yet connected; cannot send message to "
<< GetDeviceInfoLogString();
return;
}
if (is_sending_message_) {
PA_LOG(ERROR) << "Cannot send message because another message is currently "
<< "being sent to " << GetDeviceInfoLogString();
return;
}
is_sending_message_ = true;
SendMessageImpl(std::move(message));
}
void Connection::AddObserver(ConnectionObserver* observer) {
observers_.AddObserver(observer);
}
void Connection::RemoveObserver(ConnectionObserver* observer) {
observers_.RemoveObserver(observer);
}
void Connection::SetStatus(Status status) {
if (status_ == status)
return;
received_bytes_.clear();
Status old_status = status_;
status_ = status;
for (auto& observer : observers_)
observer.OnConnectionStatusChanged(this, old_status, status_);
}
void Connection::OnDidSendMessage(const WireMessage& message, bool success) {
if (!is_sending_message_) {
PA_LOG(ERROR) << "OnDidSendMessage(), but a send was not expected to be in "
<< "progress to " << GetDeviceInfoLogString();
return;
}
is_sending_message_ = false;
for (auto& observer : observers_)
observer.OnSendCompleted(*this, message, success);
}
void Connection::OnBytesReceived(const std::string& bytes) {
if (!IsConnected()) {
PA_LOG(ERROR) << "OnBytesReceived(), but not connected to "
<< GetDeviceInfoLogString();
return;
}
received_bytes_ += bytes;
bool is_incomplete_message;
std::unique_ptr<WireMessage> message =
DeserializeWireMessage(&is_incomplete_message);
if (is_incomplete_message)
return;
if (message) {
for (auto& observer : observers_)
observer.OnMessageReceived(*this, *message);
}
// Whether the message was parsed successfully or not, clear the
// |received_bytes_| buffer.
received_bytes_.clear();
}
std::unique_ptr<WireMessage> Connection::DeserializeWireMessage(
bool* is_incomplete_message) {
return WireMessage::Deserialize(received_bytes_, is_incomplete_message);
}
void Connection::NotifyGattCharacteristicsNotAvailable() {
for (auto& observer : observers_)
observer.OnGattCharacteristicsNotAvailable();
}
std::string Connection::GetDeviceInfoLogString() {
std::stringstream ss;
ss << "{id: \"" << remote_device().GetTruncatedDeviceIdForLogs()
<< "\", addr: \"" << GetDeviceAddress() << "\"}";
return ss.str();
}
std::ostream& operator<<(std::ostream& stream,
const Connection::Status& status) {
switch (status) {
case Connection::Status::DISCONNECTED:
stream << "[disconnected]";
break;
case Connection::Status::IN_PROGRESS:
stream << "[in progress]";
break;
case Connection::Status::CONNECTED:
stream << "[connected]";
break;
}
return stream;
}
} // namespace cryptauth
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