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/*
* Copyright (C) 2017 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef WAKEUP_CONTROLLER_H
#define WAKEUP_CONTROLLER_H
#include <functional>
#include <netdutils/Status.h>
#include "IptablesRestoreController.h"
#include "NFLogListener.h"
namespace android {
namespace net {
class WakeupController {
public:
// Simple data struct for passing back packet wakeup event information to the ReportFn callback.
struct ReportArgs {
std::string prefix;
uint64_t timestampNs;
int uid;
int gid;
int ethertype;
int ipNextHeader;
std::vector<uint8_t> dstHw;
std::string srcIp;
std::string dstIp;
int srcPort;
int dstPort;
};
// Callback that is triggered for every wakeup event.
using ReportFn = std::function<void(const struct ReportArgs&)>;
// iptables chain where wakeup packets are matched
static const char LOCAL_MANGLE_INPUT[];
static const uint32_t kDefaultPacketCopyRange;
WakeupController(ReportFn report, IptablesRestoreInterface* iptables)
: mReport(report), mIptables(iptables) {}
~WakeupController();
// Subscribe this controller to a NFLOG events arriving at |listener|.
netdutils::Status init(NFLogListenerInterface* listener);
// Install iptables rules to match packets arriving on |ifName|
// which match |mark|/|mask|. Metadata from matching packets will
// be delivered along with the arbitrary string |prefix| to
// INetdEventListener::onWakeupEvent.
netdutils::Status addInterface(const std::string& ifName, const std::string& prefix,
uint32_t mark, uint32_t mask);
// Remove iptables rules previously installed by addInterface().
// |ifName|, |prefix|, |mark| and |mask| must match precisely.
netdutils::Status delInterface(const std::string& ifName, const std::string& prefix,
uint32_t mark, uint32_t mask);
private:
netdutils::Status execIptables(const std::string& action, const std::string& ifName,
const std::string& prefix, uint32_t mark, uint32_t mask);
ReportFn const mReport;
IptablesRestoreInterface* const mIptables;
NFLogListenerInterface* mListener;
};
} // namespace net
} // namespace android
#endif /* WAKEUP_CONTROLLER_H */
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