121 lines
4.1 KiB
C++
121 lines
4.1 KiB
C++
//
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// Copyright (C) 2015 The Android Open Source Project
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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#include "apmanager/dbus/firewalld_dbus_proxy.h"
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#include <base/bind.h>
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#include <brillo/errors/error.h>
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#include "apmanager/event_dispatcher.h"
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using std::string;
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namespace apmanager {
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FirewalldDBusProxy::FirewalldDBusProxy(
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const scoped_refptr<dbus::Bus>& bus,
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const base::Closure& service_appeared_callback,
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const base::Closure& service_vanished_callback)
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: proxy_(new org::chromium::FirewalldProxy(bus)),
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dispatcher_(EventDispatcher::GetInstance()),
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service_appeared_callback_(service_appeared_callback),
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service_vanished_callback_(service_vanished_callback),
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service_available_(false) {
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// Monitor service owner changes. This callback lives for the lifetime of
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// the ObjectProxy.
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proxy_->GetObjectProxy()->SetNameOwnerChangedCallback(
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base::Bind(&FirewalldDBusProxy::OnServiceOwnerChanged,
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weak_factory_.GetWeakPtr()));
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// One time callback when service becomes available.
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proxy_->GetObjectProxy()->WaitForServiceToBeAvailable(
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base::Bind(&FirewalldDBusProxy::OnServiceAvailable,
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weak_factory_.GetWeakPtr()));
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}
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FirewalldDBusProxy::~FirewalldDBusProxy() {}
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bool FirewalldDBusProxy::RequestUdpPortAccess(const string& interface,
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uint16_t port) {
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if (!service_available_) {
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LOG(ERROR) << "firewalld service not available";
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return false;
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}
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bool success = false;
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brillo::ErrorPtr error;
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if (!proxy_->PunchUdpHole(port, interface, &success, &error)) {
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LOG(ERROR) << "Failed to request UDP port access: "
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<< error->GetCode() << " " << error->GetMessage();
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return false;
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}
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if (!success) {
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LOG(ERROR) << "Access request for UDP port " << port
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<< " on interface " << interface << " is denied";
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return false;
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}
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LOG(INFO) << "Access granted for UDP port " << port
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<< " on interface " << interface;
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return true;
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}
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bool FirewalldDBusProxy::ReleaseUdpPortAccess(const string& interface,
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uint16_t port) {
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if (!service_available_) {
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LOG(ERROR) << "firewalld service not available";
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return false;
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}
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brillo::ErrorPtr error;
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bool success;
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if (!proxy_->PlugUdpHole(port, interface, &success, &error)) {
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LOG(ERROR) << "Failed to release UDP port access: "
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<< error->GetCode() << " " << error->GetMessage();
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return false;
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}
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if (!success) {
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LOG(ERROR) << "Release request for UDP port " << port
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<< " on interface " << interface << " is denied";
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return false;
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}
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LOG(INFO) << "Access released for UDP port " << port
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<< " on interface " << interface;
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return true;
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}
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void FirewalldDBusProxy::OnServiceAvailable(bool available) {
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LOG(INFO) << __func__ << ": " << available;
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// The callback might invoke calls to the ObjectProxy, so defer the callback
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// to event loop.
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if (available && !service_appeared_callback_.is_null()) {
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dispatcher_->PostTask(service_appeared_callback_);
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} else if (!available && !service_vanished_callback_.is_null()) {
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dispatcher_->PostTask(service_vanished_callback_);
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}
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service_available_ = available;
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}
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void FirewalldDBusProxy::OnServiceOwnerChanged(const string& old_owner,
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const string& new_owner) {
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LOG(INFO) << __func__ << " old: " << old_owner << " new: " << new_owner;
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if (new_owner.empty()) {
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OnServiceAvailable(false);
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} else {
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OnServiceAvailable(true);
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}
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}
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} // namespace apmanager
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