| #include <sstream> |
| #include <exception> |
| #include <iostream> |
| #include <iterator> |
| #include <unordered_map> |
| #include <iomanip> |
| #include <tuple> |
| #include <algorithm> |
| #include "defines.hpp" |
| #include "impl.hpp" |
| |
| namespace openpower |
| { |
| namespace vpd |
| { |
| namespace parser |
| { |
| |
| static const std::unordered_map<std::string, Record> supportedRecords = |
| { |
| {"VINI", Record::VINI}, |
| {"OPFR", Record::OPFR}, |
| {"OSYS", Record::OSYS} |
| }; |
| |
| static constexpr auto MAC_ADDRESS_LEN_BYTES = 6; |
| static constexpr auto LAST_KW = "PF"; |
| |
| static const std::unordered_map<std::string, |
| internal::KeywordInfo> supportedKeywords = |
| { |
| {"DR", std::make_tuple(record::Keyword::DR, keyword::Encoding::ASCII)}, |
| {"PN", std::make_tuple(record::Keyword::PN, keyword::Encoding::ASCII)}, |
| {"SN", std::make_tuple(record::Keyword::SN, keyword::Encoding::ASCII)}, |
| {"CC", std::make_tuple(record::Keyword::CC, keyword::Encoding::ASCII)}, |
| {"HW", std::make_tuple(record::Keyword::HW, keyword::Encoding::RAW)}, |
| {"B1", std::make_tuple(record::Keyword::B1, keyword::Encoding::B1)}, |
| {"VN", std::make_tuple(record::Keyword::VN, keyword::Encoding::ASCII)}, |
| {"MB", std::make_tuple(record::Keyword::MB, keyword::Encoding::RAW)}, |
| {"MM", std::make_tuple(record::Keyword::MM, keyword::Encoding::ASCII)} |
| }; |
| |
| namespace |
| { |
| |
| using RecordId = uint8_t; |
| using RecordOffset = uint16_t; |
| using RecordSize = uint16_t; |
| using RecordType = uint16_t; |
| using RecordLength = uint16_t; |
| using KwSize = uint8_t; |
| using ECCOffset = uint16_t; |
| using ECCLength = uint16_t; |
| |
| constexpr auto toHex(size_t c) |
| { |
| constexpr auto map = "0123456789abcdef"; |
| return map[c]; |
| } |
| |
| } |
| |
| namespace offsets |
| { |
| |
| enum Offsets |
| { |
| VHDR = 17, |
| VHDR_TOC_ENTRY = 29, |
| VTOC_PTR = 35, |
| }; |
| |
| } |
| |
| namespace lengths |
| { |
| |
| enum Lengths |
| { |
| RECORD_NAME = 4, |
| KW_NAME = 2, |
| RECORD_MIN = 44, |
| }; |
| |
| } |
| |
| void Impl::checkHeader() const |
| { |
| if (vpd.empty() || (lengths::RECORD_MIN > vpd.size())) |
| { |
| throw std::runtime_error("Malformed VPD"); |
| } |
| else |
| { |
| auto iterator = vpd.cbegin(); |
| std::advance(iterator, offsets::VHDR); |
| auto stop = std::next(iterator, lengths::RECORD_NAME); |
| std::string record(iterator, stop); |
| if ("VHDR" != record) |
| { |
| throw std::runtime_error("VHDR record not found"); |
| } |
| } |
| } |
| |
| internal::OffsetList Impl::readTOC() const |
| { |
| internal::OffsetList offsets {}; |
| |
| // The offset to VTOC could be 1 or 2 bytes long |
| RecordOffset vtocOffset = vpd.at(offsets::VTOC_PTR); |
| RecordOffset highByte = vpd.at(offsets::VTOC_PTR + 1); |
| vtocOffset |= (highByte << 8); |
| |
| // Got the offset to VTOC, skip past record header and keyword header |
| // to get to the record name. |
| auto iterator = vpd.cbegin(); |
| std::advance(iterator, |
| vtocOffset + |
| sizeof(RecordId) + |
| sizeof(RecordSize) + |
| // Skip past the RT keyword, which contains |
| // the record name. |
| lengths::KW_NAME + |
| sizeof(KwSize)); |
| |
| auto stop = std::next(iterator, lengths::RECORD_NAME); |
| std::string record(iterator, stop); |
| if ("VTOC" != record) |
| { |
| throw std::runtime_error("VTOC record not found"); |
| } |
| |
| // VTOC record name is good, now read through the TOC, stored in the PT |
| // PT keyword; vpdBuffer is now pointing at the first character of the |
| // name 'VTOC', jump to PT data. |
| // Skip past record name and KW name, 'PT' |
| std::advance(iterator, lengths::RECORD_NAME + lengths::KW_NAME); |
| // Note size of PT |
| std::size_t ptLen = *iterator; |
| // Skip past PT size |
| std::advance(iterator, sizeof(KwSize)); |
| |
| // vpdBuffer is now pointing to PT data |
| return readPT(iterator, ptLen); |
| } |
| |
| internal::OffsetList Impl::readPT(Binary::const_iterator iterator, |
| std::size_t ptLength) const |
| { |
| internal::OffsetList offsets{}; |
| |
| auto end = iterator; |
| std::advance(end, ptLength); |
| |
| // Look at each entry in the PT keyword. In the entry, |
| // we care only about the record offset information. |
| while (iterator < end) |
| { |
| // Skip record name and record type |
| std::advance(iterator, lengths::RECORD_NAME + sizeof(RecordType)); |
| |
| // Get record offset |
| RecordOffset offset = *iterator; |
| RecordOffset highByte = *(iterator + 1); |
| offset |= (highByte << 8); |
| offsets.push_back(offset); |
| |
| // Jump record size, record length, ECC offset and ECC length |
| std::advance(iterator, |
| sizeof(RecordSize) + |
| sizeof(RecordLength) + |
| sizeof(ECCOffset) + |
| sizeof(ECCLength)); |
| } |
| |
| return offsets; |
| } |
| |
| void Impl::processRecord(std::size_t recordOffset) |
| { |
| // Jump to record name |
| auto nameOffset = recordOffset + |
| sizeof(RecordId) + |
| sizeof(RecordSize) + |
| // Skip past the RT keyword, which contains |
| // the record name. |
| lengths::KW_NAME + |
| sizeof(KwSize); |
| // Get record name |
| auto iterator = vpd.cbegin(); |
| std::advance(iterator, nameOffset); |
| |
| std::string name(iterator, iterator + lengths::RECORD_NAME); |
| if (supportedRecords.end() != supportedRecords.find(name)) |
| { |
| // If it's a record we're interested in, proceed to find |
| // contained keywords and their values. |
| std::advance(iterator, lengths::RECORD_NAME); |
| auto kwMap = readKeywords(iterator); |
| // Add entry for this record (and contained keyword:value pairs) |
| // to the parsed vpd output. |
| out.emplace(std::move(name), std::move(kwMap)); |
| } |
| } |
| |
| std::string Impl::readKwData(const internal::KeywordInfo& keyword, |
| std::size_t dataLength, |
| Binary::const_iterator iterator) |
| { |
| switch (std::get<keyword::Encoding>(keyword)) |
| { |
| case keyword::Encoding::ASCII: |
| { |
| auto stop = std::next(iterator, dataLength); |
| return std::string(iterator, stop); |
| } |
| |
| case keyword::Encoding::RAW: |
| { |
| auto stop = std::next(iterator, dataLength); |
| std::string data(iterator, stop); |
| std::string result {}; |
| std::for_each(data.cbegin(), data.cend(), |
| [&result](size_t c) |
| { |
| result += toHex(c >> 4); |
| result += toHex(c & 0x0F); |
| }); |
| return result; |
| } |
| |
| case keyword::Encoding::B1: |
| { |
| //B1 is MAC address, represent as AA:BB:CC:DD:EE:FF |
| auto stop = std::next(iterator, MAC_ADDRESS_LEN_BYTES); |
| std::string data(iterator, stop); |
| std::string result {}; |
| auto strItr = data.cbegin(); |
| size_t firstDigit = *strItr; |
| result += toHex(firstDigit >> 4); |
| result += toHex(firstDigit & 0x0F); |
| std::advance(strItr, 1); |
| std::for_each(strItr, data.cend(), |
| [&result](size_t c) |
| { |
| result += ":"; |
| result += toHex(c >> 4); |
| result += toHex(c & 0x0F); |
| }); |
| return result; |
| } |
| |
| default: |
| break; |
| } |
| |
| return {}; |
| } |
| |
| internal::KeywordMap Impl::readKeywords(Binary::const_iterator iterator) |
| { |
| internal::KeywordMap map {}; |
| while (true) |
| { |
| // Note keyword name |
| std::string kw(iterator, iterator + lengths::KW_NAME); |
| if (LAST_KW == kw) |
| { |
| // We're done |
| break; |
| } |
| // Jump past keyword name |
| std::advance(iterator, lengths::KW_NAME); |
| // Note keyword data length |
| std::size_t length = *iterator; |
| // Jump past keyword length |
| std::advance(iterator, sizeof(KwSize)); |
| // Pointing to keyword data now |
| if (supportedKeywords.end() != supportedKeywords.find(kw)) |
| { |
| // Keyword is of interest to us |
| std::string data = readKwData( |
| (supportedKeywords.find(kw))->second, |
| length, |
| iterator); |
| map.emplace(std::move(kw), std::move(data)); |
| } |
| // Jump past keyword data length |
| std::advance(iterator, length); |
| } |
| |
| return map; |
| } |
| |
| } // namespace parser |
| } // namespace vpd |
| } // namespace openpower |