Junxiao Shi
97 lines
3.2 KiB
C++
97 lines
3.2 KiB
C++
/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
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/*
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* Copyright (c) 2014-2018, Regents of the University of California,
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* Arizona Board of Regents,
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* Colorado State University,
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* University Pierre & Marie Curie, Sorbonne University,
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* Washington University in St. Louis,
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* Beijing Institute of Technology,
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* The University of Memphis.
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*
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* This file is part of NFD (Named Data Networking Forwarding Daemon).
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* See AUTHORS.md for complete list of NFD authors and contributors.
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*
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* NFD is free software: you can redistribute it and/or modify it under the terms
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* of the GNU General Public License as published by the Free Software Foundation,
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* either version 3 of the License, or (at your option) any later version.
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*
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* NFD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* NFD, e.g., in COPYING.md file. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "route.hpp"
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#include <ndn-cxx/util/string-helper.hpp>
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namespace nfd {
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namespace rib {
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const uint64_t PA_ROUTE_COST = 2048; ///< cost of route created by prefix announcement
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static time::steady_clock::TimePoint
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computeExpiration(const ndn::PrefixAnnouncement& ann)
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{
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time::steady_clock::Duration validityEnd = time::steady_clock::Duration::max();
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if (ann.getValidityPeriod()) {
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auto now = time::system_clock::now();
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if (!ann.getValidityPeriod()->isValid(now)) {
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validityEnd = time::steady_clock::Duration::zero();
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}
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else {
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validityEnd = ann.getValidityPeriod()->getPeriod().second - now;
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}
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}
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return time::steady_clock::now() +
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std::min(validityEnd, time::duration_cast<time::steady_clock::Duration>(ann.getExpiration()));
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}
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Route::Route(const ndn::PrefixAnnouncement& ann, uint64_t faceId)
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: faceId(faceId)
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, origin(ndn::nfd::ROUTE_ORIGIN_PREFIXANN)
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, cost(PA_ROUTE_COST)
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, flags(ndn::nfd::ROUTE_FLAG_CHILD_INHERIT)
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, expires(computeExpiration(ann))
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, announcement(ann)
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, annExpires(*expires)
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{
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}
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bool
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operator==(const Route& lhs, const Route& rhs)
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{
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return lhs.faceId == rhs.faceId &&
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lhs.origin == rhs.origin &&
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lhs.flags == rhs.flags &&
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lhs.cost == rhs.cost &&
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lhs.expires == rhs.expires &&
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lhs.announcement == rhs.announcement;
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}
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std::ostream&
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operator<<(std::ostream& os, const Route& route)
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{
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os << "Route("
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<< "faceid: " << route.faceId
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<< ", origin: " << route.origin
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<< ", cost: " << route.cost
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<< ", flags: " << ndn::AsHex{route.flags};
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if (route.expires) {
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os << ", expires in: " << time::duration_cast<time::milliseconds>(*route.expires - time::steady_clock::now());
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}
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else {
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os << ", never expires";
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}
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if (route.announcement) {
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os << ", announcement: (" << *route.announcement << ')';
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}
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os << ')';
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return os;
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}
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} // namespace rib
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} // namespace nfd
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