NS-3 based Named Data Networking (NDN) simulator
ndnSIM 2.5: NDN, CCN, CCNx, content centric networks
API Documentation
host-to-gateway-readvertise-policy.cpp
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1 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
2 /*
3  * Copyright (c) 2014-2018, Regents of the University of California,
4  * Arizona Board of Regents,
5  * Colorado State University,
6  * University Pierre & Marie Curie, Sorbonne University,
7  * Washington University in St. Louis,
8  * Beijing Institute of Technology,
9  * The University of Memphis.
10  *
11  * This file is part of NFD (Named Data Networking Forwarding Daemon).
12  * See AUTHORS.md for complete list of NFD authors and contributors.
13  *
14  * NFD is free software: you can redistribute it and/or modify it under the terms
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24  */
25 
27 #include "core/scope-prefix.hpp"
28 #include "rib/rib-manager.hpp"
29 
32 
33 namespace nfd {
34 namespace rib {
35 
36 static const name::Component IGNORE_COMPONENT("nrd");
37 static const time::seconds DEFAULT_REFRESH_INTERVAL = 25_s;
38 
40  const ConfigSection& section)
41  : m_keyChain(keyChain)
42 {
43  auto interval = section.get_optional<uint64_t>("refresh_interval");
44  m_refreshInterval = interval ? time::seconds(*interval) : DEFAULT_REFRESH_INTERVAL;
45 }
46 
47 optional<ReadvertiseAction>
49 {
50  auto ribEntryName = ribRoute.entry->getName();
51  if (scope_prefix::LOCALHOST.isPrefixOf(ribEntryName) ||
52  ribEntryName == RibManager::LOCALHOP_TOP_PREFIX) {
53  return nullopt;
54  }
55 
56  // find out the shortest identity whose name is a prefix of the RIB entry name
57  auto prefixToAdvertise = ribEntryName;
58  ndn::security::pib::Identity signingIdentity;
59  bool isFound = false;
60 
61  for (const auto& identity : m_keyChain.getPib().getIdentities()) {
62  auto prefix = identity.getName();
63 
64  // ignore the identity name's last component if it is "nrd"
65  if (!prefix.empty() && IGNORE_COMPONENT == prefix.at(-1)) {
66  prefix = prefix.getPrefix(-1);
67  }
68 
69  if (prefix.isPrefixOf(prefixToAdvertise)) {
70  isFound = true;
71  prefixToAdvertise = prefix;
72  signingIdentity = identity;
73  }
74  }
75 
76  if (isFound) {
77  return ReadvertiseAction{prefixToAdvertise, ndn::security::signingByIdentity(signingIdentity)};
78  }
79  else {
80  return nullopt;
81  }
82 }
83 
84 time::milliseconds
86 {
87  return m_refreshInterval;
88 }
89 
90 } // namespace rib
91 } // namespace nfd
PartialName getPrefix(ssize_t nComponents) const
Extract a prefix of the name.
Definition: name.hpp:203
The interface of signing key management.
Definition: key-chain.hpp:46
const Name LOCALHOST("ndn:/localhost")
ndn:/localhost
references a route
Definition: rib.hpp:43
const IdentityContainer & getIdentities() const
Get all the identities.
Definition: pib.cpp:108
const Pib & getPib() const
Definition: key-chain.hpp:100
static const time::seconds DEFAULT_REFRESH_INTERVAL
Copyright (c) 2011-2015 Regents of the University of California.
Definition: ndn-common.hpp:40
shared_ptr< RibEntry > entry
Definition: rib.hpp:45
optional< ReadvertiseAction > handleNewRoute(const RibRouteRef &ribRoute) const override
decide whether to readvertise a route, and what prefix to readvertise
boost::property_tree::ptree ConfigSection
a config file section
HostToGatewayReadvertisePolicy(const ndn::KeyChain &keyChain, const ConfigSection &section)
SigningInfo signingByIdentity(const Name &identityName)
Represents a name component.
const Name & getName() const
Get the name of the identity.
Definition: identity.cpp:37
static const name::Component IGNORE_COMPONENT("nrd")
A frontend handle of an Identity.
Definition: identity.hpp:42
a decision made by readvertise policy
static const Name LOCALHOP_TOP_PREFIX
const nullopt_t nullopt((nullopt_t::init()))