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Parse RDA message headers
This commit is contained in:
Dan Paulat
parent
33c114ee9d
commit
85ccd25705
4 changed files with 284 additions and 11 deletions
44
wxdata/include/scwx/wsr88d/rda/message_header.hpp
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44
wxdata/include/scwx/wsr88d/rda/message_header.hpp
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@ -0,0 +1,44 @@
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#include <cstdint>
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#include <memory>
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namespace scwx
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{
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namespace wsr88d
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{
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namespace rda
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{
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class MessageHeaderImpl;
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class MessageHeader
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{
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public:
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explicit MessageHeader();
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~MessageHeader();
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MessageHeader(const MessageHeader&) = delete;
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MessageHeader& operator=(const MessageHeader&) = delete;
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MessageHeader(MessageHeader&&) noexcept;
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MessageHeader& operator=(MessageHeader&&);
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uint16_t message_size() const;
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uint8_t rda_redundant_channel() const;
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uint8_t message_type() const;
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uint16_t id_sequence_number() const;
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uint16_t julian_date() const;
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uint32_t milliseconds_of_day() const;
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uint16_t number_of_message_segments() const;
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uint16_t message_segment_number() const;
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bool Parse(std::istream& is);
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static const size_t SIZE = 16u;
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private:
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std::unique_ptr<MessageHeaderImpl> p;
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};
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} // namespace rda
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} // namespace wsr88d
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} // namespace scwx
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163
wxdata/source/scwx/wsr88d/rda/message_header.cpp
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163
wxdata/source/scwx/wsr88d/rda/message_header.cpp
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@ -0,0 +1,163 @@
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#include <scwx/wsr88d/rda/message_header.hpp>
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#include <istream>
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#include <string>
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#include <boost/log/trivial.hpp>
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#ifdef WIN32
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# include <WinSock2.h>
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#else
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# include <arpa/inet.h>
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#endif
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namespace scwx
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{
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namespace wsr88d
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{
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namespace rda
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{
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static const std::string logPrefix_ = "[scwx::wsr88d::rda::message_header] ";
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class MessageHeaderImpl
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{
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public:
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explicit MessageHeaderImpl() :
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messageSize_(),
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rdaRedundantChannel_(),
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messageType_(),
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idSequenceNumber_(),
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julianDate_(),
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millisecondsOfDay_(),
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numberOfMessageSegments_(),
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messageSegmentNumber_() {};
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~MessageHeaderImpl() = default;
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uint16_t messageSize_;
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uint8_t rdaRedundantChannel_;
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uint8_t messageType_;
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uint16_t idSequenceNumber_;
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uint16_t julianDate_;
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uint32_t millisecondsOfDay_;
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uint16_t numberOfMessageSegments_;
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uint16_t messageSegmentNumber_;
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};
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MessageHeader::MessageHeader() :
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p(std::make_unique<MessageHeaderImpl>())
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{
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}
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MessageHeader::~MessageHeader() = default;
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MessageHeader::MessageHeader(MessageHeader&&) noexcept = default;
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MessageHeader& MessageHeader::operator=(MessageHeader&&) = default;
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uint16_t MessageHeader::message_size() const
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{
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return p->messageSize_;
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}
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uint8_t MessageHeader::rda_redundant_channel() const
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{
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return p->rdaRedundantChannel_;
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}
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uint8_t MessageHeader::message_type() const
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{
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return p->messageType_;
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}
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uint16_t MessageHeader::id_sequence_number() const
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{
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return p->idSequenceNumber_;
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}
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uint16_t MessageHeader::julian_date() const
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{
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return p->julianDate_;
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}
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uint32_t MessageHeader::milliseconds_of_day() const
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{
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return p->millisecondsOfDay_;
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}
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uint16_t MessageHeader::number_of_message_segments() const
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{
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return p->numberOfMessageSegments_;
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}
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uint16_t MessageHeader::message_segment_number() const
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{
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return p->messageSegmentNumber_;
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}
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bool MessageHeader::Parse(std::istream& is)
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{
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bool headerValid = true;
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is.read(reinterpret_cast<char*>(&p->messageSize_), 2);
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is.read(reinterpret_cast<char*>(&p->rdaRedundantChannel_), 1);
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is.read(reinterpret_cast<char*>(&p->messageType_), 1);
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is.read(reinterpret_cast<char*>(&p->idSequenceNumber_), 2);
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is.read(reinterpret_cast<char*>(&p->julianDate_), 2);
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is.read(reinterpret_cast<char*>(&p->millisecondsOfDay_), 4);
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is.read(reinterpret_cast<char*>(&p->numberOfMessageSegments_), 2);
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is.read(reinterpret_cast<char*>(&p->messageSegmentNumber_), 2);
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p->messageSize_ = htons(p->messageSize_);
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p->idSequenceNumber_ = htons(p->idSequenceNumber_);
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p->julianDate_ = htons(p->julianDate_);
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p->millisecondsOfDay_ = htonl(p->millisecondsOfDay_);
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p->numberOfMessageSegments_ = htons(p->numberOfMessageSegments_);
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p->messageSegmentNumber_ = htons(p->messageSegmentNumber_);
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if (is.eof())
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{
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BOOST_LOG_TRIVIAL(debug) << logPrefix_ << "Reached end of file";
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headerValid = false;
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}
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else
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{
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if (p->messageSize_ < 9)
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{
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BOOST_LOG_TRIVIAL(warning)
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<< logPrefix_ << "Invalid message size: " << p->messageSize_;
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headerValid = false;
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}
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if (p->julianDate_ < 1)
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{
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BOOST_LOG_TRIVIAL(warning)
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<< logPrefix_ << "Invalid date: " << p->julianDate_;
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headerValid = false;
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}
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if (p->millisecondsOfDay_ > 86'399'999u)
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{
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BOOST_LOG_TRIVIAL(warning)
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<< logPrefix_ << "Invalid milliseconds: " << p->millisecondsOfDay_;
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headerValid = false;
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}
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if (p->messageSize_ < 65534 &&
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p->messageSegmentNumber_ > p->numberOfMessageSegments_)
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{
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BOOST_LOG_TRIVIAL(warning)
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<< logPrefix_ << "Invalid segment = " << p->messageSegmentNumber_
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<< "/" << p->numberOfMessageSegments_;
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headerValid = false;
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}
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}
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if (headerValid)
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{
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BOOST_LOG_TRIVIAL(trace)
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<< logPrefix_
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<< "Message type: " << static_cast<unsigned>(p->messageType_);
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}
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return headerValid;
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}
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} // namespace rda
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} // namespace wsr88d
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} // namespace scwx
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@ -1,4 +1,5 @@
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#include <scwx/wsr88d/rpg/ar2v_file.hpp>
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#include <scwx/wsr88d/rda/message_header.hpp>
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#include <scwx/util/rangebuf.hpp>
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#include <fstream>
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@ -33,18 +34,22 @@ public:
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julianDate_ {0},
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milliseconds_ {0},
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icao_(),
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numRecords_ {0} {};
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numRecords_ {0},
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rawRecords_() {};
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~Ar2vFileImpl() = default;
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void ParseLDMRecords(std::ifstream& f);
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void LoadLDMRecords(std::ifstream& f);
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void ParseLDMRecords();
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std::string tapeFilename_;
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std::string extensionNumber_;
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int32_t julianDate_;
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int32_t milliseconds_;
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uint32_t julianDate_;
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uint32_t milliseconds_;
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std::string icao_;
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size_t numRecords_;
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std::list<std::stringstream> rawRecords_;
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};
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Ar2vFile::Ar2vFile() : p(std::make_unique<Ar2vFileImpl>()) {}
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@ -101,13 +106,13 @@ bool Ar2vFile::LoadFile(const std::string& filename)
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<< logPrefix_ << "Time: " << p->milliseconds_;
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BOOST_LOG_TRIVIAL(debug) << logPrefix_ << "ICAO: " << p->icao_;
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p->ParseLDMRecords(f);
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p->LoadLDMRecords(f);
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}
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return fileValid;
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}
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void Ar2vFileImpl::ParseLDMRecords(std::ifstream& f)
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void Ar2vFileImpl::LoadLDMRecords(std::ifstream& f)
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{
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numRecords_ = 0;
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@ -122,7 +127,7 @@ void Ar2vFileImpl::ParseLDMRecords(std::ifstream& f)
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controlWord = htonl(controlWord);
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recordSize = std::abs(controlWord);
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BOOST_LOG_TRIVIAL(debug)
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BOOST_LOG_TRIVIAL(trace)
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<< logPrefix_ << "LDM Record Found: Size = " << recordSize << " bytes";
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boost::iostreams::filtering_streambuf<boost::iostreams::input> in;
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@ -130,14 +135,15 @@ void Ar2vFileImpl::ParseLDMRecords(std::ifstream& f)
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in.push(boost::iostreams::bzip2_decompressor());
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in.push(r);
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std::ostringstream of;
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try
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{
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std::streamsize bytesCopied = boost::iostreams::copy(in, of);
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BOOST_LOG_TRIVIAL(debug)
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std::stringstream ss;
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std::streamsize bytesCopied = boost::iostreams::copy(in, ss);
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BOOST_LOG_TRIVIAL(trace)
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<< logPrefix_ << "Decompressed record size = " << bytesCopied
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<< " bytes";
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rawRecords_.push_back(std::move(ss));
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}
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catch (const boost::iostreams::bzip2_error& ex)
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{
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@ -151,10 +157,64 @@ void Ar2vFileImpl::ParseLDMRecords(std::ifstream& f)
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++numRecords_;
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}
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ParseLDMRecords();
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BOOST_LOG_TRIVIAL(debug)
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<< logPrefix_ << "Found " << numRecords_ << " LDM Records";
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}
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void Ar2vFileImpl::ParseLDMRecords()
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{
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size_t count = 0;
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for (auto it = rawRecords_.begin(); it != rawRecords_.end(); it++)
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{
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std::stringstream& ss = *it;
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BOOST_LOG_TRIVIAL(trace) << logPrefix_ << "Record " << count++;
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// The communications manager inserts an extra 12 bytes at the beginning
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// of each record
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ss.seekg(12);
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while (!ss.eof())
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{
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// TODO: Parse message, not just header
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rda::MessageHeader header;
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if (!header.Parse(ss))
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{
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// Invalid header
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break;
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}
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// Seek to the end of the current message
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ss.seekg(header.message_size() * 2 - rda::MessageHeader::SIZE,
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std::ios_base::cur);
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off_t offset = 0;
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uint16_t nextSize = 0u;
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do
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{
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ss.read(reinterpret_cast<char*>(&nextSize), 2);
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if (nextSize == 0)
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{
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offset += 2;
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}
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else
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{
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ss.seekg(-2, std::ios_base::cur);
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}
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} while (!ss.eof() && nextSize == 0u);
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if (!ss.eof() && offset != 0)
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{
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BOOST_LOG_TRIVIAL(trace)
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<< logPrefix_ << "Next record offset by " << offset << " bytes";
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}
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}
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}
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}
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} // namespace rpg
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} // namespace wsr88d
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} // namespace scwx
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@ -6,14 +6,20 @@ set(HDR_UTIL include/scwx/util/rangebuf.hpp)
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set(SRC_UTIL source/scwx/util/rangebuf.cpp)
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set(HDR_WSR88D_RPG include/scwx/wsr88d/rpg/ar2v_file.hpp)
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set(SRC_WSR88D_RPG source/scwx/wsr88d/rpg/ar2v_file.cpp)
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set(HDR_WSR88D_RDA include/scwx/wsr88d/rda/message_header.hpp)
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set(SRC_WSR88D_RDA source/scwx/wsr88d/rda/message_header.cpp)
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add_library(wxdata OBJECT ${HDR_UTIL}
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${SRC_UTIL}
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${HDR_WSR88D_RDA}
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${SRC_WSR88D_RDA}
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${HDR_WSR88D_RPG}
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${SRC_WSR88D_RPG})
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source_group("Header Files\\util" FILES ${HDR_UTIL})
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source_group("Source Files\\util" FILES ${SRC_UTIL})
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source_group("Header Files\\wsr88d\\rda" FILES ${HDR_WSR88D_RDA})
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source_group("Source Files\\wsr88d\\rda" FILES ${SRC_WSR88D_RDA})
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source_group("Header Files\\wsr88d\\rpg" FILES ${HDR_WSR88D_RPG})
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source_group("Source Files\\wsr88d\\rpg" FILES ${SRC_WSR88D_RPG})
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