/*
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* Copyright (C) 2017 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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#ifndef WAKEUP_CONTROLLER_H
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#define WAKEUP_CONTROLLER_H
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#include <functional>
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#include <netdutils/Status.h>
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#include "IptablesRestoreController.h"
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#include "NFLogListener.h"
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namespace android {
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namespace net {
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class WakeupController {
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public:
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// Simple data struct for passing back packet wakeup event information to the ReportFn callback.
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struct ReportArgs {
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std::string prefix;
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uint64_t timestampNs;
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int uid;
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int gid;
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int ethertype;
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int ipNextHeader;
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std::vector<uint8_t> dstHw;
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std::string srcIp;
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std::string dstIp;
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int srcPort;
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int dstPort;
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};
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// Callback that is triggered for every wakeup event.
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using ReportFn = std::function<void(const struct ReportArgs&)>;
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// iptables chain where wakeup packets are matched
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static const char LOCAL_MANGLE_INPUT[];
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static const uint32_t kDefaultPacketCopyRange;
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WakeupController(ReportFn report, IptablesRestoreInterface* iptables)
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: mReport(report), mIptables(iptables) {}
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~WakeupController();
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// Subscribe this controller to a NFLOG events arriving at |listener|.
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netdutils::Status init(NFLogListenerInterface* listener);
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// Install iptables rules to match packets arriving on |ifName|
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// which match |mark|/|mask|. Metadata from matching packets will
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// be delivered along with the arbitrary string |prefix| to
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// INetdEventListener::onWakeupEvent.
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netdutils::Status addInterface(const std::string& ifName, const std::string& prefix,
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uint32_t mark, uint32_t mask);
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// Remove iptables rules previously installed by addInterface().
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// |ifName|, |prefix|, |mark| and |mask| must match precisely.
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netdutils::Status delInterface(const std::string& ifName, const std::string& prefix,
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uint32_t mark, uint32_t mask);
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private:
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netdutils::Status execIptables(const std::string& action, const std::string& ifName,
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const std::string& prefix, uint32_t mark, uint32_t mask);
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ReportFn const mReport;
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IptablesRestoreInterface* const mIptables;
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NFLogListenerInterface* mListener;
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};
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} // namespace net
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} // namespace android
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#endif /* WAKEUP_CONTROLLER_H */
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