Spyridon Mastorakis | 5ea3322 | 2016-12-07 14:33:53 -0800 | [diff] [blame] | 1 | /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */ |
| 2 | /** |
| 3 | * Copyright (c) 2011-2015 Regents of the University of California. |
| 4 | * |
| 5 | * This file is part of ndnSIM. See AUTHORS for complete list of ndnSIM authors and |
| 6 | * contributors. |
| 7 | * |
| 8 | * ndnSIM is free software: you can redistribute it and/or modify it under the terms |
| 9 | * of the GNU General Public License as published by the Free Software Foundation, |
| 10 | * either version 3 of the License, or (at your option) any later version. |
| 11 | * |
| 12 | * ndnSIM is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; |
| 13 | * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR |
| 14 | * PURPOSE. See the GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License along with |
| 17 | * ndnSIM, e.g., in COPYING.md file. If not, see <http://www.gnu.org/licenses/>. |
| 18 | **/ |
| 19 | |
| 20 | #include "ndn-block-header.hpp" |
| 21 | |
| 22 | #include <iosfwd> |
| 23 | #include <boost/iostreams/concepts.hpp> |
| 24 | #include <boost/iostreams/stream.hpp> |
| 25 | |
| 26 | #include <ndn-cxx/encoding/tlv.hpp> |
| 27 | #include <ndn-cxx/interest.hpp> |
| 28 | #include <ndn-cxx/data.hpp> |
| 29 | #include <ndn-cxx/lp/packet.hpp> |
| 30 | |
| 31 | namespace io = boost::iostreams; |
| 32 | namespace nfdFace = nfd::face; |
| 33 | |
| 34 | namespace ns3 { |
| 35 | namespace ndn { |
| 36 | |
| 37 | ns3::TypeId |
| 38 | BlockHeader::GetTypeId() |
| 39 | { |
| 40 | static ns3::TypeId tid = |
| 41 | ns3::TypeId("ns3::ndn::Packet") |
| 42 | .SetGroupName("Ndn") |
| 43 | .SetParent<Header>() |
| 44 | .AddConstructor<BlockHeader>() |
| 45 | ; |
| 46 | return tid; |
| 47 | } |
| 48 | |
| 49 | TypeId |
| 50 | BlockHeader::GetInstanceTypeId(void) const |
| 51 | { |
| 52 | return GetTypeId(); |
| 53 | } |
| 54 | |
| 55 | BlockHeader::BlockHeader() |
| 56 | { |
| 57 | } |
| 58 | |
Alexander Afanasyev | 59090db | 2020-02-21 16:37:43 -0500 | [diff] [blame^] | 59 | BlockHeader::BlockHeader(const Block& packet) |
| 60 | : m_block(packet) |
Spyridon Mastorakis | 5ea3322 | 2016-12-07 14:33:53 -0800 | [diff] [blame] | 61 | { |
| 62 | } |
| 63 | |
| 64 | uint32_t |
| 65 | BlockHeader::GetSerializedSize(void) const |
| 66 | { |
| 67 | return m_block.size(); |
| 68 | } |
| 69 | |
| 70 | void |
| 71 | BlockHeader::Serialize(ns3::Buffer::Iterator start) const |
| 72 | { |
| 73 | start.Write(m_block.wire(), m_block.size()); |
| 74 | } |
| 75 | |
| 76 | class Ns3BufferIteratorSource : public io::source { |
| 77 | public: |
| 78 | Ns3BufferIteratorSource(ns3::Buffer::Iterator& is) |
| 79 | : m_is(is) |
| 80 | { |
| 81 | } |
| 82 | |
| 83 | std::streamsize |
| 84 | read(char* buf, std::streamsize nMaxRead) |
| 85 | { |
| 86 | std::streamsize i = 0; |
| 87 | for (; i < nMaxRead && !m_is.IsEnd(); ++i) { |
| 88 | buf[i] = m_is.ReadU8(); |
| 89 | } |
| 90 | if (i == 0) { |
| 91 | return -1; |
| 92 | } |
| 93 | else { |
| 94 | return i; |
| 95 | } |
| 96 | } |
| 97 | |
| 98 | private: |
| 99 | ns3::Buffer::Iterator& m_is; |
| 100 | }; |
| 101 | |
| 102 | uint32_t |
| 103 | BlockHeader::Deserialize(ns3::Buffer::Iterator start) |
| 104 | { |
| 105 | io::stream<Ns3BufferIteratorSource> is(start); |
| 106 | m_block = ::ndn::Block::fromStream(is); |
| 107 | return m_block.size(); |
| 108 | } |
| 109 | |
| 110 | void |
| 111 | BlockHeader::Print(std::ostream& os) const |
| 112 | { |
| 113 | namespace tlv = ::ndn::tlv; |
| 114 | namespace lp = ::ndn::lp; |
| 115 | |
| 116 | std::function<void(const Block& block)> decodeAndPrint = [&os, &decodeAndPrint] (const Block& block) { |
| 117 | switch (block.type()) { |
| 118 | case tlv::Interest: { |
| 119 | Interest i(block); |
| 120 | os << "Interest: " << i; |
| 121 | break; |
| 122 | } |
| 123 | case tlv::Data: { |
| 124 | Data d(block); |
| 125 | os << "Data: " << d.getName(); |
| 126 | break; |
| 127 | } |
| 128 | case lp::tlv::LpPacket: { |
| 129 | os << "NDNLP("; |
| 130 | lp::Packet p(block); |
| 131 | if (p.has<lp::FragCountField>() && p.get<lp::FragCountField>() != 1) { |
| 132 | os << "fragment " << (p.get<lp::FragIndexField>() + 1) << " out of " << p.get<lp::FragCountField>(); |
| 133 | } |
| 134 | else { |
| 135 | if (p.has<lp::NackField>()) { |
| 136 | lp::NackHeader nack = p.get<lp::NackField>(); |
| 137 | os << "NACK(" << nack.getReason() << ") for "; |
| 138 | } |
| 139 | |
| 140 | ::ndn::Buffer::const_iterator first, last; |
| 141 | std::tie(first, last) = p.get<lp::FragmentField>(0); |
Alexander Afanasyev | 25e4d8f | 2019-07-29 13:44:04 -0400 | [diff] [blame] | 142 | try { |
| 143 | Block fragmentBlock(&*first, std::distance(first, last)); |
| 144 | decodeAndPrint(fragmentBlock); |
| 145 | } |
| 146 | catch (const tlv::Error& error) { |
| 147 | os << "Non-TLV bytes (size: " << std::distance(first, last) << ")"; |
| 148 | } |
Spyridon Mastorakis | 5ea3322 | 2016-12-07 14:33:53 -0800 | [diff] [blame] | 149 | } |
| 150 | os << ")"; |
| 151 | break; |
| 152 | } |
| 153 | default: { |
| 154 | os << "Unrecognized"; |
| 155 | break; |
| 156 | } |
| 157 | } |
| 158 | }; |
| 159 | |
| 160 | decodeAndPrint(m_block); |
| 161 | } |
| 162 | |
| 163 | Block& |
| 164 | BlockHeader::getBlock() |
| 165 | { |
| 166 | return m_block; |
| 167 | } |
| 168 | |
| 169 | const Block& |
| 170 | BlockHeader::getBlock() const |
| 171 | { |
| 172 | return m_block; |
| 173 | } |
| 174 | |
| 175 | } // namespace ndn |
| 176 | } // namespace ns3 |