120 lines
4.1 KiB
C++
120 lines
4.1 KiB
C++
/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
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/*
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* Copyright (c) 2013-2023 Regents of the University of California.
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*
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* This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
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*
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* ndn-cxx library is free software: you can redistribute it and/or modify it under the
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* terms of the GNU Lesser General Public License as published by the Free Software
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* Foundation, either version 3 of the License, or (at your option) any later version.
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*
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* ndn-cxx library is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
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* PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
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*
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* You should have received copies of the GNU General Public License and GNU Lesser
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* General Public License along with ndn-cxx, e.g., in COPYING.md file. If not, see
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* <http://www.gnu.org/licenses/>.
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*
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* See AUTHORS.md for complete list of ndn-cxx authors and contributors.
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*/
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#include <ndn-cxx/face.hpp>
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#include <ndn-cxx/security/key-chain.hpp>
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#include <ndn-cxx/security/signing-helpers.hpp>
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#include <iostream>
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// Enclosing code in ndn simplifies coding (can also use `using namespace ndn`)
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namespace ndn {
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// Additional nested namespaces should be used to prevent/limit name conflicts
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namespace examples {
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class Producer
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{
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public:
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void
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run()
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{
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m_face.setInterestFilter("/example/testApp/randomData",
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std::bind(&Producer::onInterest, this, _1, _2),
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nullptr, // RegisterPrefixSuccessCallback is optional
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std::bind(&Producer::onRegisterFailed, this, _1, _2));
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auto cert = m_keyChain.getPib().getDefaultIdentity().getDefaultKey().getDefaultCertificate();
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m_certServeHandle = m_face.setInterestFilter(security::extractIdentityFromCertName(cert.getName()),
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[this, cert] (auto&&...) {
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m_face.put(cert);
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},
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std::bind(&Producer::onRegisterFailed, this, _1, _2));
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m_face.processEvents();
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}
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private:
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void
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onInterest(const InterestFilter&, const Interest& interest)
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{
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std::cout << ">> I: " << interest << std::endl;
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constexpr std::string_view content{"Hello, world!"};
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// Create Data packet
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auto data = std::make_shared<Data>(interest.getName());
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data->setFreshnessPeriod(10_s);
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data->setContent(make_span(reinterpret_cast<const uint8_t*>(content.data()), content.size()));
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// in order for the consumer application to be able to validate the packet, you need to setup
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// the following keys:
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// 1. Generate example trust anchor
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//
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// ndnsec key-gen /example
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// ndnsec cert-dump -i /example > example-trust-anchor.cert
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//
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// 2. Create a key for the producer and sign it with the example trust anchor
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//
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// ndnsec key-gen /example/testApp
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// ndnsec sign-req /example/testApp | ndnsec cert-gen -s /example -i example | ndnsec cert-install -
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// Sign Data packet with default identity
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m_keyChain.sign(*data);
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// m_keyChain.sign(*data, signingByIdentity(<identityName>));
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// m_keyChain.sign(*data, signingByKey(<keyName>));
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// m_keyChain.sign(*data, signingByCertificate(<certName>));
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// m_keyChain.sign(*data, signingWithSha256());
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// Return Data packet to the requester
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std::cout << "<< D: " << *data << std::endl;
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m_face.put(*data);
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}
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void
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onRegisterFailed(const Name& prefix, const std::string& reason)
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{
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std::cerr << "ERROR: Failed to register prefix '" << prefix
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<< "' with the local forwarder (" << reason << ")" << std::endl;
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m_face.shutdown();
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}
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private:
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Face m_face;
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KeyChain m_keyChain;
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ScopedRegisteredPrefixHandle m_certServeHandle;
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};
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} // namespace examples
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} // namespace ndn
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int
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main(int argc, char** argv)
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{
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try {
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ndn::examples::Producer producer;
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producer.run();
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return 0;
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}
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catch (const std::exception& e) {
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std::cerr << "ERROR: " << e.what() << std::endl;
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return 1;
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}
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}
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