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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
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/**
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* Copyright (c) 2013-2014 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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* @author Alexander Afanasyev <http://lasr.cs.ucla.edu/afanasyev/index.html>
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*/
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// correct way to include ndn-cxx headers
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// #include <ndn-cxx/face.hpp>
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#include "face.hpp"
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#include "util/crypto.hpp"
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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 namespace could be used to prevent/limit name contentions
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namespace examples {
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void
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onTimeout(Face& face,
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const Interest& interest)
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{
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std::cout << "Timeout" << interest.toUri() << std::endl;
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}
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void
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onData(Face& face,
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const Interest& interest, Data& data)
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{
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std::cout << "I: " << interest.toUri() << std::endl;
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std::cout << "D: " << data.getName().toUri() << std::endl;
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// I want to exclude data by digest
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Interest interestWithExlusion(interest.getName());
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interestWithExlusion.setScope(1);
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interestWithExlusion.setInterestLifetime(time::milliseconds(3000));
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interestWithExlusion.setMustBeFresh(true);
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const Block& block = data.wireEncode();
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ndn::ConstBufferPtr implicitDigestBuffer = ndn::crypto::sha256(block.wire(), block.size());
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name::Component implicitDigest = name::Component::fromImplicitSha256Digest(implicitDigestBuffer);
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Exclude exclusion = interestWithExlusion.getExclude();
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exclusion.appendExclude(implicitDigest, false);
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interestWithExlusion.setExclude(exclusion);
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face.expressInterest(interestWithExlusion,
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bind(onData, ref(face), _1, _2),
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bind(onTimeout, ref(face), _1));
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}
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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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Interest i(Name("/example/testApp/randomData"));
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i.setScope(1);
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i.setInterestLifetime(time::milliseconds(3000));
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i.setMustBeFresh(true);
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Face face;
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face.expressInterest(i,
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bind(onData, ref(face), _1, _2),
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bind(onTimeout, ref(face), _1));
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// processEvents will block until the requested data received or timeout occurs
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face.processEvents();
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}
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catch(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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return 0;
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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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return ndn::examples::main(argc, argv);
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}
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