prefix-announcement-header.cpp
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1 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
2 /*
3  * Copyright (c) 2013-2019 Regents of the University of California.
4  *
5  * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
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7  * ndn-cxx library is free software: you can redistribute it and/or modify it under the
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19  * See AUTHORS.md for complete list of ndn-cxx authors and contributors.
20  */
21 
23 #include "ndn-cxx/lp/tlv.hpp"
24 
25 namespace ndn {
26 namespace lp {
27 
29 
31 {
32  wireDecode(block);
33 }
34 
36  : m_prefixAnn(std::move(prefixAnn))
37 {
38  if (m_prefixAnn->getData() == nullopt) {
39  NDN_THROW(Error("PrefixAnnouncement does not contain Data"));
40  }
41 }
42 
43 template<encoding::Tag TAG>
44 size_t
46 {
47  if (m_prefixAnn == nullopt) {
48  NDN_THROW(Error("PrefixAnnouncementHeader does not contain a PrefixAnnouncement"));
49  }
50 
51  size_t length = 0;
52  length += m_prefixAnn->getData()->wireEncode(encoder);
53  length += encoder.prependVarNumber(length);
54  length += encoder.prependVarNumber(tlv::PrefixAnnouncement);
55  return length;
56 }
57 
59 
60 void
62 {
63  if (wire.type() != tlv::PrefixAnnouncement) {
64  NDN_THROW(Error("PrefixAnnouncement", wire.type()));
65  }
66 
67  wire.parse();
68  m_prefixAnn.emplace(Data(wire.get(ndn::tlv::Data)));
69 }
70 } // namespace lp
71 } // namespace ndn
Represents a TLV element of the NDN packet format.
Definition: block.hpp:45
uint32_t type() const noexcept
Return the TLV-TYPE of the Block.
Definition: block.hpp:277
void parse() const
Parse TLV-VALUE into sub-elements.
Definition: block.cpp:324
const Block & get(uint32_t type) const
Return the first sub-element of the specified TLV-TYPE.
Definition: block.cpp:412
A prefix announcement object that represents an application's intent of registering a prefix toward i...
Represents a PrefixAnnouncement header field in NDNLP.
size_t wireEncode(EncodingImpl< TAG > &encoder) const
Encodes the prefix announcement header to the wire format.
#define NDN_CXX_DEFINE_WIRE_ENCODE_INSTANTIATIONS(ClassName)
#define NDN_THROW(e)
Definition: exception.hpp:61
@ PrefixAnnouncement
Definition: tlv.hpp:52
@ Data
Definition: tlv.hpp:69
Definition: data.cpp:25