blob: 6149526de06d184b6230e58168f4aef0da354f1a [file] [log] [blame]
/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
* Copyright (c) 2013-2018 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 "prefix-announcement.hpp"
#include "encoding/tlv-nfd.hpp"
#include <boost/lexical_cast.hpp>
namespace ndn {
static const name::Component KEYWORD_PA_COMP = "20025041"_block;
PrefixAnnouncement::PrefixAnnouncement() = default;
PrefixAnnouncement::PrefixAnnouncement(Data data)
: m_data(std::move(data))
{
if (m_data->getContentType() != tlv::ContentType_PrefixAnn) {
BOOST_THROW_EXCEPTION(Error("Data is not a prefix announcement: ContentType is " +
boost::lexical_cast<std::string>(m_data->getContentType())));
}
const Name& dataName = m_data->getName();
if (dataName.size() < 3 || dataName[-3] != KEYWORD_PA_COMP ||
!dataName[-2].isVersion() || !dataName[-1].isSegment()) {
BOOST_THROW_EXCEPTION(Error("Data is not a prefix announcement: wrong name structure"));
}
m_announcedName = dataName.getPrefix(-3);
const Block& payload = m_data->getContent();
payload.parse();
m_expiration = time::milliseconds(readNonNegativeInteger(payload.get(tlv::nfd::ExpirationPeriod)));
auto validityElement = payload.find(tlv::ValidityPeriod);
if (validityElement != payload.elements_end()) {
m_validity.emplace(*validityElement);
}
for (const Block& element : payload.elements()) {
if (element.type() != tlv::nfd::ExpirationPeriod && element.type() != tlv::ValidityPeriod &&
tlv::isCriticalType(element.type())) {
BOOST_THROW_EXCEPTION(Error("unrecognized element of critical type " +
to_string(element.type())));
}
}
}
const Data&
PrefixAnnouncement::toData(KeyChain& keyChain, const ndn::security::SigningInfo& si,
optional<uint64_t> version) const
{
if (!m_data) {
Name dataName = m_announcedName;
dataName.append(KEYWORD_PA_COMP);
dataName.appendVersion(version.value_or(time::toUnixTimestamp(time::system_clock::now()).count()));
dataName.appendSegment(0);
m_data.emplace(dataName);
Block content(tlv::Content);
content.push_back(makeNonNegativeIntegerBlock(tlv::nfd::ExpirationPeriod,
m_expiration.count()));
if (m_validity) {
content.push_back(m_validity->wireEncode());
}
content.encode();
m_data->setContent(content);
keyChain.sign(*m_data, si);
}
return *m_data;
}
PrefixAnnouncement&
PrefixAnnouncement::setAnnouncedName(Name name)
{
m_data.reset();
m_announcedName = std::move(name);
return *this;
}
PrefixAnnouncement&
PrefixAnnouncement::setExpiration(time::milliseconds expiration)
{
if (expiration < 0_ms) {
BOOST_THROW_EXCEPTION(std::invalid_argument("expiration period is negative"));
}
m_data.reset();
m_expiration = expiration;
return *this;
}
PrefixAnnouncement&
PrefixAnnouncement::setValidityPeriod(optional<security::ValidityPeriod> validity)
{
m_data.reset();
m_validity = std::move(validity);
return *this;
}
} // namespace ndn