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/*
* Copyright (c) 2017-2022 Cisco and/or its affiliates.
* 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.
*/
#pragma once
#include <core/facade.h>
#include <hicn/transport/auth/verifier.h>
#include <hicn/transport/core/content_object.h>
#include <protocols/rtc/rtc_state.h>
namespace transport {
namespace protocol {
namespace rtc {
class RTCVerifier {
public:
explicit RTCVerifier(std::shared_ptr<auth::Verifier> verifier,
uint32_t factor_relevant, uint32_t factor_alert);
virtual ~RTCVerifier() = default;
void setState(std::shared_ptr<RTCState> rtc_state);
void setVerifier(std::shared_ptr<auth::Verifier> verifier);
void setFactorRelevant(uint32_t factor_relevant);
void setFactorAlert(uint32_t factor_alert);
auth::VerificationPolicy verify(core::Interest &interest);
auth::VerificationPolicy verify(core::ContentObject &content_object,
bool is_fec = false);
auth::VerificationPolicy verifyProbe(core::ContentObject &content_object);
auth::VerificationPolicy verifyNack(core::ContentObject &content_object);
auth::VerificationPolicy verifyFec(core::ContentObject &content_object);
auth::VerificationPolicy verifyData(core::ContentObject &content_object);
auth::VerificationPolicy verifyManifest(core::ContentObject &content_object);
auth::VerificationPolicy processManifest(core::ContentObject &content_object);
void onDataRecoveredFec(uint32_t suffix);
protected:
using Index = uint64_t;
using Packet = std::pair<Index, auth::Suffix>;
using PacketSet = std::set<Packet>;
class Packets {
public:
std::pair<PacketSet::iterator, bool> add(const Packet &packet,
const auth::CryptoHash &digest);
PacketSet::iterator remove(PacketSet::iterator packet_it);
const PacketSet &set() const;
PacketSet::iterator packet(auth::Suffix suffix);
const auth::Verifier::SuffixMap &suffixMap() const;
private:
PacketSet packets_;
std::unordered_map<auth::Suffix, PacketSet::iterator> packets_map_;
auth::Verifier::SuffixMap suffix_map_;
};
// The RTC state.
std::shared_ptr<RTCState> rtc_state_;
// The verifier instance.
std::shared_ptr<auth::Verifier> verifier_;
// Used to compute the relevance windows size (in packets).
uint32_t factor_relevant_;
// Used to compute the alert threshold (in packets).
uint32_t factor_alert_;
// The maximum number of entries a manifest can contain.
uint8_t manifest_max_capacity_;
// Hash algorithm used by manifests.
auth::CryptoHashType manifest_hash_algo_;
// Digests extracted from all manifests received.
auth::Verifier::SuffixMap manifest_digests_;
// The number of data packets processed.
Index current_index_;
// Unverified packets with index in relevance window.
Packets packets_unverif_;
// Unverified erased packets with index outside relevance window.
std::unordered_set<auth::Suffix> packets_unverif_erased_;
};
} // namespace rtc
} // namespace protocol
} // namespace transport
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