Davide Pesavento
136 lines
4.5 KiB
C++
136 lines
4.5 KiB
C++
/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
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/*
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* Copyright (c) 2013-2018, Regents of the University of California.
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*
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* This file is part of ndn-tools (Named Data Networking Essential Tools).
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* See AUTHORS.md for complete list of ndn-tools authors and contributors.
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*
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* ndn-tools 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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* ndn-tools 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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* ndn-tools, e.g., in COPYING.md file. If not, see <http://www.gnu.org/licenses/>.
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*
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* See AUTHORS.md for complete list of ndn-cxx authors and contributors.
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*
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* @author Alexander Afanasyev <http://lasr.cs.ucla.edu/afanasyev/index.html>
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*/
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#include "ndn-dissect.hpp"
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#include <algorithm>
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#include <ndn-cxx/name-component.hpp>
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#include <ndn-cxx/encoding/tlv.hpp>
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#include <ndn-cxx/util/indented-stream.hpp>
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namespace ndn {
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namespace dissect {
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static const std::map<uint32_t, const char*> TLV_DICT = {
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{tlv::Interest , "Interest"},
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{tlv::Data , "Data"},
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{tlv::Name , "Name"},
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{tlv::GenericNameComponent , "GenericNameComponent"},
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{tlv::ImplicitSha256DigestComponent, "ImplicitSha256DigestComponent"},
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{tlv::CanBePrefix , "CanBePrefix"},
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{tlv::MustBeFresh , "MustBeFresh"},
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//{tlv::ForwardingHint , "ForwardingHint"},
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{tlv::Nonce , "Nonce"},
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{tlv::InterestLifetime , "InterestLifetime"},
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{tlv::HopLimit , "HopLimit"},
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{tlv::Parameters , "Parameters"},
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{tlv::MetaInfo , "MetaInfo"},
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{tlv::Content , "Content"},
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{tlv::SignatureInfo , "SignatureInfo"},
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{tlv::SignatureValue , "SignatureValue"},
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{tlv::ContentType , "ContentType"},
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{tlv::FreshnessPeriod , "FreshnessPeriod"},
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{tlv::FinalBlockId , "FinalBlockId"},
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{tlv::SignatureType , "SignatureType"},
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{tlv::KeyLocator , "KeyLocator"},
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{tlv::KeyDigest , "KeyDigest"},
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// Deprecated elements
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{tlv::Selectors , "Selectors"},
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{tlv::MinSuffixComponents , "MinSuffixComponents"},
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{tlv::MaxSuffixComponents , "MaxSuffixComponents"},
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{tlv::PublisherPublicKeyLocator , "PublisherPublicKeyLocator"},
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{tlv::Exclude , "Exclude"},
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{tlv::ChildSelector , "ChildSelector"},
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{tlv::Any , "Any"},
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};
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void
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NdnDissect::printType(std::ostream& os, uint32_t type)
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{
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os << type << " (";
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auto it = TLV_DICT.find(type);
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if (it != TLV_DICT.end()) {
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os << it->second;
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}
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else if (type < tlv::AppPrivateBlock1) {
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os << "RESERVED_1";
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}
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else if (tlv::AppPrivateBlock1 <= type && type < 253) {
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os << "APP_TAG_1";
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}
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else if (253 <= type && type < tlv::AppPrivateBlock2) {
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os << "RESERVED_3";
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}
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else {
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os << "APP_TAG_3";
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}
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os << ")";
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}
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void
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NdnDissect::printBlock(std::ostream& os, const Block& block)
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{
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printType(os, block.type());
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os << " (size: " << block.value_size() << ")";
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try {
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// if (block.type() != tlv::Content && block.type() != tlv::SignatureValue)
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block.parse();
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}
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catch (const tlv::Error&) {
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// pass (e.g., leaf block reached)
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// @todo: Figure how to deterministically figure out that value is not recursive TLV block
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}
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if (block.elements().empty()) {
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os << " [[";
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name::Component(block.value(), block.value_size()).toUri(os);
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os<< "]]";
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}
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os << std::endl;
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util::IndentedStream os2(os, " ");
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std::for_each(block.elements_begin(), block.elements_end(),
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[this, &os2] (const Block& element) { printBlock(os2, element); });
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}
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void
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NdnDissect::dissect(std::ostream& os, std::istream& is)
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{
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while (is.peek() != std::char_traits<char>::eof()) {
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try {
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printBlock(os, Block::fromStream(is));
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}
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catch (const std::exception& e) {
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std::cerr << "ERROR: " << e.what() << std::endl;
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}
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}
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}
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} // namespace dissect
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} // namespace ndn
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