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/*
* Copyright (c) 2017-2021 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:
RTCVerifier(std::shared_ptr<auth::Verifier> verifier,
uint32_t max_unverified_delay);
virtual ~RTCVerifier() = default;
void setState(std::shared_ptr<RTCState> rtc_state);
void setVerifier(std::shared_ptr<auth::Verifier> verifier);
void setMaxUnverifiedDelay(uint32_t max_unverified_delay);
void onDataRecoveredFec(uint32_t suffix);
void onJumpForward(uint32_t next_suffix);
uint32_t getTotalUnverified() const;
uint32_t getMaxUnverified() const;
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);
protected:
// The RTC state.
std::shared_ptr<RTCState> rtc_state_;
// The verifier instance.
std::shared_ptr<auth::Verifier> verifier_;
// Hash algorithm used by manifests.
auth::CryptoHashType manifest_hash_algo_;
// The last manifest processed.
auth::Suffix last_manifest_;
// Hold digests extracted from all manifests received.
auth::Verifier::SuffixMap manifest_digests_;
// Hold hashes of all content objects received before they are verified.
auth::Verifier::SuffixMap unverified_packets_;
// Hold number of unverified bytes.
std::unordered_map<auth::Suffix, uint32_t> unverified_bytes_;
// Maximum delay (in ms) for an unverified byte to become verifed.
uint32_t max_unverified_delay_;
// Maximum number of unverified bytes before aborting the connection.
uint64_t max_unverified_bytes_;
};
} // end namespace rtc
} // namespace protocol
} // namespace transport
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