blob: 245628004479810bb587791adead43fa0491be98 [file] [log] [blame]
/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
* Copyright (c) 2013-2023 Regents of the University of California.
*
* This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
*
* ndn-cxx library is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any later version.
*
* ndn-cxx library is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
*
* You should have received copies of the GNU General Public License and GNU Lesser
* General Public License along with ndn-cxx, e.g., in COPYING.md file. If not, see
* <http://www.gnu.org/licenses/>.
*
* See AUTHORS.md for complete list of ndn-cxx authors and contributors.
*/
#include <ndn-cxx/face.hpp>
#include <ndn-cxx/security/key-chain.hpp>
#include <ndn-cxx/security/signing-helpers.hpp>
#include <iostream>
// Enclosing code in ndn simplifies coding (can also use `using namespace ndn`)
namespace ndn {
// Additional nested namespaces should be used to prevent/limit name conflicts
namespace examples {
class Producer
{
public:
void
run()
{
m_face.setInterestFilter("/example/testApp/randomData",
std::bind(&Producer::onInterest, this, _2),
nullptr, // RegisterPrefixSuccessCallback is optional
std::bind(&Producer::onRegisterFailed, this, _1, _2));
auto cert = m_keyChain.getPib().getDefaultIdentity().getDefaultKey().getDefaultCertificate();
m_certServeHandle = m_face.setInterestFilter(security::extractIdentityFromCertName(cert.getName()),
[this, cert] (auto&&...) {
m_face.put(cert);
},
std::bind(&Producer::onRegisterFailed, this, _1, _2));
m_face.processEvents();
}
private:
void
onInterest(const Interest& interest)
{
std::cout << ">> I: " << interest << std::endl;
// Create Data packet
auto data = std::make_shared<Data>();
data->setName(interest.getName());
data->setFreshnessPeriod(10_s);
constexpr std::string_view content{"Hello, world!"};
data->setContent({reinterpret_cast<const uint8_t*>(content.data()), content.size()});
// In order for the consumer application to be able to validate the packet, you need to setup
// the following keys:
// 1. Generate example trust anchor
//
// ndnsec key-gen /example
// ndnsec cert-dump -i /example > example-trust-anchor.cert
//
// 2. Create a key for the producer and sign it with the example trust anchor
//
// ndnsec key-gen /example/testApp
// ndnsec sign-req /example/testApp | ndnsec cert-gen -s /example -i example | ndnsec cert-install -
// Sign Data packet with default identity
m_keyChain.sign(*data);
// m_keyChain.sign(*data, signingByIdentity(<identityName>));
// m_keyChain.sign(*data, signingByKey(<keyName>));
// m_keyChain.sign(*data, signingByCertificate(<certName>));
// m_keyChain.sign(*data, signingWithSha256());
// Return Data packet to the requester
std::cout << "<< D: " << *data << std::endl;
m_face.put(*data);
}
void
onRegisterFailed(const Name& prefix, const std::string& reason)
{
std::cerr << "ERROR: Failed to register prefix '" << prefix
<< "' with the local forwarder (" << reason << ")\n";
m_face.shutdown();
}
private:
Face m_face;
KeyChain m_keyChain;
ScopedRegisteredPrefixHandle m_certServeHandle;
};
} // namespace examples
} // namespace ndn
int
main(int argc, char** argv)
{
try {
ndn::examples::Producer producer;
producer.run();
return 0;
}
catch (const std::exception& e) {
std::cerr << "ERROR: " << e.what() << std::endl;
return 1;
}
}