Method Read

src/net.cpp:1555–1604

}

bool CAddrDB::Read(CAddrMan& addr) {
    // open input file, and associate with CAutoFile
    FILE* file       = fopen(pathAddr.string().c_str(), "rb");
    CAutoFile filein = CAutoFile(file, SER_DISK, CLIENT_VERSION);
    if (!filein)
        return ERRORMSG("Failed to open file %s", pathAddr.string());

    // use file size to size memory buffer
    int32_t fileSize = boost::filesystem::file_size(pathAddr);
    int32_t dataSize = fileSize - sizeof(uint256);
    // Don't try to resize to a negative number if file is small
    if (dataSize < 0)
        dataSize = 0;
    vector<uint8_t> vchData;
    vchData.resize(dataSize);
    uint256 hashIn;

    // read data and checksum from file
    try {
        filein.read((char*)&vchData[0], dataSize);
        filein >> hashIn;
    } catch (std::exception& e) {
        return ERRORMSG("Deserialize or I/O error - %s", e.what());
    }
    filein.fclose();

    CDataStream ssPeers(vchData, SER_DISK, CLIENT_VERSION);

    // verify stored checksum matches input data
    uint256 hashTmp = Hash(ssPeers.begin(), ssPeers.end());
    if (hashIn != hashTmp)
        return ERRORMSG("Checksum mismatch, data corrupted");

    uint8_t pchMsgTmp[4];
    try {
        // de-serialize file header (network specific magic number) and ..
        ssPeers >> FLATDATA(pchMsgTmp);

        // ... verify the network matches ours
        if (memcmp(pchMsgTmp, SysCfg().MessageStart(), sizeof(pchMsgTmp)))
            return ERRORMSG("Invalid network magic number");

        // de-serialize address data into one CAddrMan object
        ssPeers >> addr;
    } catch (std::exception& e) {
        return ERRORMSG("Deserialize or I/O error - %s", e.what());
    }

    return true;
}