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/*
 * Copyright (c) 2017-2019 Cisco and/or its affiliates.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <hicn/transport/interfaces/rtc_socket_producer.h>
#include <hicn/transport/interfaces/socket_consumer.h>
#include <hicn/transport/interfaces/socket_producer.h>
#ifndef _WIN32
#include <hicn/transport/utils/daemonizator.h>
#endif
#include <hicn/transport/utils/literals.h>

#include <fstream>
#include <iomanip>

#ifdef __linux__
#include <mcheck.h>
#endif

#ifdef _WIN32
#include <hicn/transport/portability/win_portability.h>
#endif

namespace transport {

namespace interface {

#ifndef ERROR_SUCCESS
#define ERROR_SUCCESS 0
#endif
#define ERROR_SETUP -5

using CryptoSuite = utils::CryptoSuite;
using Identity = utils::Identity;

struct ClientConfiguration {
  ClientConfiguration()
      : name("b001::abcd", 0), verify(false), beta(-1.f), drop_factor(-1.f),
        window(-1), virtual_download(true),
        producer_certificate("/tmp/rsa_certificate.pem"),
        receive_buffer(std::make_shared<std::vector<uint8_t>>()),
        download_size(0), report_interval_milliseconds_(1000), rtc_(false) {}

  Name name;
  bool verify;
  double beta;
  double drop_factor;
  double window;
  bool virtual_download;
  std::string producer_certificate;
  std::shared_ptr<std::vector<uint8_t>> receive_buffer;
  std::size_t download_size;
  std::uint32_t report_interval_milliseconds_;
  TransportProtocolAlgorithms transport_protocol_;
  bool rtc_;
};

class Rate {
public:
  Rate() : rate_kbps_(0) {}

  Rate(const std::string &rate) {
    std::size_t found = rate.find("kbps");
    if (found != std::string::npos) {
      rate_kbps_ = std::stof(rate.substr(0, found));
    } else {
      throw std::runtime_error("Format " + rate + " not correct");
    }
  }

  Rate(const Rate &other) : rate_kbps_(other.rate_kbps_) {}

  Rate &operator=(const std::string &rate) {
    std::size_t found = rate.find("kbps");
    if (found != std::string::npos) {
      rate_kbps_ = std::stof(rate.substr(0, found));
    } else {
      throw std::runtime_error("Format " + rate + " not correct");
    }

    return *this;
  }

  std::chrono::microseconds getMicrosecondsForPacket(std::size_t packet_size) {
    return std::chrono::microseconds(
        packet_size * long(std::round(1000.0 * 8.0 / rate_kbps_)));
  }

private:
  float rate_kbps_;
};

struct ServerConfiguration {
  ServerConfiguration()
      : name("b001::abcd/64"), virtual_producer(true), manifest(false),
        live_production(false), sign(false), content_lifetime(600000000_U32),
        content_object_size(1440), download_size(20 * 1024 * 1024),
        hash_algorithm(HashAlgorithm::SHA_256),
        keystore_name("/tmp/rsa_crypto_material.p12"),
        keystore_password("cisco"), multiphase_produce_(false), rtc_(false),
        production_rate_(std::string("2048kbps")), payload_size_(1400) {}

  Prefix name;
  bool virtual_producer;
  bool manifest;
  bool live_production;
  bool sign;
  std::uint32_t content_lifetime;
  std::uint16_t content_object_size;
  std::uint32_t download_size;
  HashAlgorithm hash_algorithm;
  std::string keystore_name;
  std::string keystore_password;
  bool multiphase_produce_;
  bool rtc_;
  Rate production_rate_;
  std::size_t payload_size_;
};

class HIperfClient {
  typedef std::chrono::time_point<std::chrono::steady_clock> Time;
  typedef std::chrono::microseconds TimeDuration;

public:
  HIperfClient(const ClientConfiguration &conf)
      : configuration_(conf), total_duration_milliseconds_(0),
        old_bytes_value_(0), signals_(io_service_, SIGINT) {}

  void processPayload(ConsumerSocket &c, std::size_t bytes_transferred,
                      const std::error_code &ec) {
    Time t2 = std::chrono::steady_clock::now();
    TimeDuration dt =
        std::chrono::duration_cast<TimeDuration>(t2 - t_download_);
    long usec = (long)dt.count();

    std::cout << "Content retrieved. Size: " << bytes_transferred << " [Bytes]"
              << std::endl;

    std::cerr << "Elapsed Time: " << usec / 1000000.0 << " seconds -- "
              << (bytes_transferred * 8) * 1.0 / usec * 1.0 << " [Mbps]"
              << std::endl;

    io_service_.stop();
  }

  bool verifyData(ConsumerSocket &c, const ContentObject &contentObject) {
    if (contentObject.getPayloadType() == PayloadType::CONTENT_OBJECT) {
      std::cout << "VERIFY CONTENT" << std::endl;
    } else if (contentObject.getPayloadType() == PayloadType::MANIFEST) {
      std::cout << "VERIFY MANIFEST" << std::endl;
    }

    return true;
  }

  void processLeavingInterest(ConsumerSocket &c, const Interest &interest) {}

  void handleTimerExpiration(ConsumerSocket &c,
                             const protocol::TransportStatistics &stats) {
    const char separator = ' ';
    const int width = 20;

    utils::TimePoint t2 = utils::SteadyClock::now();
    auto exact_duration =
        std::chrono::duration_cast<utils::Milliseconds>(t2 - t_stats_);

    std::stringstream interval;
    interval << total_duration_milliseconds_ / 1000 << "-"
             << total_duration_milliseconds_ / 1000 +
                    exact_duration.count() / 1000;

    std::stringstream bytes_transferred;
    bytes_transferred << std::fixed << std::setprecision(3)
                      << (stats.getBytesRecv() - old_bytes_value_) / 1000000.0
                      << std::setfill(separator) << "[MBytes]";

    std::stringstream bandwidth;
    bandwidth << ((stats.getBytesRecv() - old_bytes_value_) * 8) /
                     (exact_duration.count()) / 1000.0
              << std::setfill(separator) << "[Mbps]";

    std::stringstream window;
    window << stats.getAverageWindowSize() << std::setfill(separator)
           << "[Interest]";

    std::stringstream avg_rtt;
    avg_rtt << stats.getAverageRtt() << std::setfill(separator) << "[us]";

    std::cout << std::left << std::setw(width) << "Interval";
    std::cout << std::left << std::setw(width) << "Transfer";
    std::cout << std::left << std::setw(width) << "Bandwidth";
    std::cout << std::left << std::setw(width) << "Retr";
    std::cout << std::left << std::setw(width) << "Cwnd";
    std::cout << std::left << std::setw(width) << "AvgRtt" << std::endl;

    std::cout << std::left << std::setw(width) << interval.str();
    std::cout << std::left << std::setw(width) << bytes_transferred.str();
    std::cout << std::left << std::setw(width) << bandwidth.str();
    std::cout << std::left << std::setw(width) << stats.getRetxCount();
    std::cout << std::left << std::setw(width) << window.str();
    std::cout << std::left << std::setw(width) << avg_rtt.str() << std::endl;
    std::cout << std::endl;

    total_duration_milliseconds_ += (uint32_t)exact_duration.count();
    old_bytes_value_ = stats.getBytesRecv();
    t_stats_ = utils::SteadyClock::now();
  }

  int setup() {
    int ret;

    // Set the transport algorithm
    TransportProtocolAlgorithms transport_protocol;

    if (configuration_.rtc_) {
      transport_protocol = RTC;
    } else if (configuration_.window < 0) {
      transport_protocol = RAAQM;
    } else {
      transport_protocol = CBR;
    }

    consumer_socket_ = std::make_unique<ConsumerSocket>(transport_protocol);

#if defined(DEBUG) && defined(__linux__)
    std::shared_ptr<transport::BasePortal> portal;
    consumer_socket_->getSocketOption(GeneralTransportOptions::PORTAL, portal);
    signals_ =
        std::make_unique<asio::signal_set>(portal->getIoService(), SIGUSR1);
    signals_->async_wait([this](const std::error_code &, const int &) {
      std::cout << "Signal SIGUSR1!" << std::endl;
      mtrace();
    });
#endif

    if (consumer_socket_->setSocketOption(CURRENT_WINDOW_SIZE,
                                          configuration_.window) ==
        SOCKET_OPTION_NOT_SET) {
      std::cerr << "ERROR -- Impossible to set the size of the window."
                << std::endl;
      return ERROR_SETUP;
    }

    if (transport_protocol == RAAQM && configuration_.beta != -1.f) {
      if (consumer_socket_->setSocketOption(RaaqmTransportOptions::BETA_VALUE,
                                            configuration_.beta) ==
          SOCKET_OPTION_NOT_SET) {
        return ERROR_SETUP;
      }
    }

    if (transport_protocol == RAAQM && configuration_.drop_factor != -1.f) {
      if (consumer_socket_->setSocketOption(RaaqmTransportOptions::DROP_FACTOR,
                                            configuration_.drop_factor) ==
          SOCKET_OPTION_NOT_SET) {
        return ERROR_SETUP;
      }
    }

    if (consumer_socket_->setSocketOption(OtherOptions::VIRTUAL_DOWNLOAD,
                                          configuration_.virtual_download) ==
        SOCKET_OPTION_NOT_SET) {
      return ERROR_SETUP;
    }

    if (configuration_.verify) {
      if (consumer_socket_->setSocketOption(
              GeneralTransportOptions::CERTIFICATE,
              configuration_.producer_certificate) == SOCKET_OPTION_NOT_SET) {
        return ERROR_SETUP;
      }
    }

    if (consumer_socket_->setSocketOption(
            GeneralTransportOptions::VERIFY_SIGNATURE, configuration_.verify) ==
        SOCKET_OPTION_NOT_SET) {
      return ERROR_SETUP;
    }

    ret = consumer_socket_->setSocketOption(
        ConsumerCallbacksOptions::INTEREST_OUTPUT,
        (ConsumerInterestCallback)std::bind(
            &HIperfClient::processLeavingInterest, this, std::placeholders::_1,
            std::placeholders::_2));

    if (ret == SOCKET_OPTION_NOT_SET) {
      return ERROR_SETUP;
    }

    ret = consumer_socket_->setSocketOption(
        ConsumerCallbacksOptions::CONTENT_RETRIEVED,
        (ConsumerContentCallback)std::bind(
            &HIperfClient::processPayload, this, std::placeholders::_1,
            std::placeholders::_2, std::placeholders::_3));

    if (ret == SOCKET_OPTION_NOT_SET) {
      return ERROR_SETUP;
    }

    ret = consumer_socket_->setSocketOption(
        ConsumerCallbacksOptions::STATS_SUMMARY,
        (ConsumerTimerCallback)std::bind(&HIperfClient::handleTimerExpiration,
                                         this, std::placeholders::_1,
                                         std::placeholders::_2));

    if (ret == SOCKET_OPTION_NOT_SET) {
      return ERROR_SETUP;
    }

    if (consumer_socket_->setSocketOption(
            GeneralTransportOptions::STATS_INTERVAL,
            configuration_.report_interval_milliseconds_) ==
        SOCKET_OPTION_NOT_SET) {
      return ERROR_SETUP;
    }

    consumer_socket_->connect();

    return ERROR_SUCCESS;
  }

  int run() {
    std::cout << "Starting download of " << configuration_.name << std::endl;

    signals_.async_wait([this](const std::error_code &, const int &) {
      consumer_socket_->stop();
      io_service_.stop();
    });

    t_download_ = t_stats_ = std::chrono::steady_clock::now();
    consumer_socket_->asyncConsume(configuration_.name,
                                   configuration_.receive_buffer);
    io_service_.run();

    return ERROR_SUCCESS;
  }

private:
  ClientConfiguration configuration_;
  Time t_stats_;
  Time t_download_;
  uint32_t total_duration_milliseconds_;
  uint64_t old_bytes_value_;
  asio::io_service io_service_;
  asio::signal_set signals_;
  std::unique_ptr<ConsumerSocket> consumer_socket_;
};

class HIperfServer {
  const std::size_t log2_content_object_buffer_size = 8;

public:
  HIperfServer(ServerConfiguration &conf)
      : configuration_(conf), signals_(io_service_, SIGINT),
        rtc_timer_(io_service_),
        content_objects_((std::uint16_t)(1 << log2_content_object_buffer_size)),
        content_objects_index_(0),
        mask_((std::uint16_t)(1 << log2_content_object_buffer_size) - 1) {
    std::string buffer(configuration_.payload_size_, 'X');
    std::cout << "Producing contents under name " << conf.name.getName()
              << std::endl;

    for (int i = 0; i < (1 << log2_content_object_buffer_size); i++) {
      content_objects_[i] = std::make_shared<ContentObject>(
          conf.name.getName(), HF_INET6_TCP, (const uint8_t *)buffer.data(),
          buffer.size());
      content_objects_[i]->setLifetime(
          default_values::content_object_expiry_time);
    }
  }

  void processInterest(ProducerSocket &p, const Interest &interest) {
    content_objects_[content_objects_index_ & mask_]->setName(
        interest.getName());
    producer_socket_->produce(
        *content_objects_[content_objects_index_++ & mask_]);
  }

  void processInterest2(ProducerSocket &p, const Interest &interest) {
    producer_socket_->setSocketOption(ProducerCallbacksOptions::CACHE_MISS,
                                      (ProducerInterestCallback)VOID_HANDLER);
    producer_socket_->setSocketOption(
        GeneralTransportOptions::CONTENT_OBJECT_EXPIRY_TIME, 5000_U32);
    produceContent(interest.getName().getSuffix());
    producer_socket_->setSocketOption(
        ProducerCallbacksOptions::CACHE_MISS,
        (ProducerInterestCallback)bind(&HIperfServer::processInterest2, this,
                                       std::placeholders::_1,
                                       std::placeholders::_2));
  }

  void produceContent(uint32_t suffix) {
    core::Name name = configuration_.name.getName();

    std::string content(configuration_.download_size, '?');
    uint32_t total;

    total = producer_socket_->produce(
        name, reinterpret_cast<const uint8_t *>(content.data()), content.size(),
        !configuration_.multiphase_produce_, suffix);

    std::cout << "Written " << total << "pieces of data in output buffer"
              << std::endl;
  }

  std::shared_ptr<utils::Identity>
  setProducerIdentity(std::string &keystore_name,
                      std::string &keystore_password,
                      HashAlgorithm &hash_algorithm) {
    if (access(keystore_name.c_str(), F_OK) != -1) {
      return std::make_shared<utils::Identity>(keystore_name, keystore_password,
                                               hash_algorithm);
    } else {
      return std::make_shared<utils::Identity>(keystore_name, keystore_password,
                                               CryptoSuite::RSA_SHA256, 1024,
                                               365, "producer-test");
    }
  }

  int setup() {
    int ret;

    if (configuration_.rtc_) {
      producer_socket_ = std::make_unique<RTCProducerSocket>();
    } else {
      producer_socket_ = std::make_unique<ProducerSocket>();
    }

    if (configuration_.sign) {
      auto identity = setProducerIdentity(configuration_.keystore_name,
                                          configuration_.keystore_password,
                                          configuration_.hash_algorithm);

      if (producer_socket_->setSocketOption(GeneralTransportOptions::IDENTITY,
                                            identity) ==
          SOCKET_OPTION_NOT_SET) {
        return ERROR_SETUP;
      }
    }

    producer_socket_->registerPrefix(configuration_.name);
    producer_socket_->connect();

    if (configuration_.rtc_) {
      std::cout << "Running RTC producer: all other options (with the "
                   "exception of the bitrate) will be ignored."
                << std::endl;
      return ERROR_SUCCESS;
    }

    if (!configuration_.virtual_producer) {
      if (producer_socket_->setSocketOption(
              GeneralTransportOptions::CONTENT_OBJECT_EXPIRY_TIME,
              configuration_.content_lifetime) == SOCKET_OPTION_NOT_SET) {
        return ERROR_SETUP;
      }

      if (producer_socket_->setSocketOption(
              GeneralTransportOptions::MAKE_MANIFEST,
              configuration_.manifest) == SOCKET_OPTION_NOT_SET) {
        return ERROR_SETUP;
      }

      if (producer_socket_->setSocketOption(
              GeneralTransportOptions::OUTPUT_BUFFER_SIZE, 200000U) ==
          SOCKET_OPTION_NOT_SET) {
        return ERROR_SETUP;
      }

      if (!configuration_.live_production) {
        produceContent(0);
      } else {
        ret = producer_socket_->setSocketOption(
            ProducerCallbacksOptions::CACHE_MISS,
            (ProducerInterestCallback)bind(&HIperfServer::processInterest2,
                                           this, std::placeholders::_1,
                                           std::placeholders::_2));

        if (ret == SOCKET_OPTION_NOT_SET) {
          return ERROR_SETUP;
        }
      }
    } else {
      ret = producer_socket_->setSocketOption(
          GeneralTransportOptions::OUTPUT_BUFFER_SIZE, 0U);

      if (ret == SOCKET_OPTION_NOT_SET) {
        return ERROR_SETUP;
      }

      ret = producer_socket_->setSocketOption(
          ProducerCallbacksOptions::CACHE_MISS,
          (ProducerInterestCallback)bind(&HIperfServer::processInterest, this,
                                         std::placeholders::_1,
                                         std::placeholders::_2));

      if (ret == SOCKET_OPTION_NOT_SET) {
        return ERROR_SETUP;
      }
    }

    return ERROR_SUCCESS;
  }

  void sendRTCContentObjectCallback(std::error_code ec) {
    if (!ec) {
      auto payload =
          content_objects_[content_objects_index_++ & mask_]->getPayload();
      producer_socket_->produce(payload->data(), payload->length());
      rtc_timer_.expires_from_now(
          configuration_.production_rate_.getMicrosecondsForPacket(
              configuration_.payload_size_));
      rtc_timer_.async_wait(
          std::bind(&HIperfServer::sendRTCContentObjectCallback, this,
                    std::placeholders::_1));
    }
  }

  int run() {
    std::cerr << "Starting to serve consumers" << std::endl;

    signals_.async_wait([this](const std::error_code &, const int &) {
      std::cout << "STOPPING!!" << std::endl;
      producer_socket_->stop();
      io_service_.stop();
    });

    if (configuration_.rtc_) {
      rtc_timer_.expires_from_now(
          configuration_.production_rate_.getMicrosecondsForPacket(
              configuration_.payload_size_));
      rtc_timer_.async_wait(
          std::bind(&HIperfServer::sendRTCContentObjectCallback, this,
                    std::placeholders::_1));
    }

    io_service_.run();

    return ERROR_SUCCESS;
  }

private:
  ServerConfiguration configuration_;
  asio::io_service io_service_;
  asio::signal_set signals_;
  asio::steady_timer rtc_timer_;
  std::vector<std::shared_ptr<ContentObject>> content_objects_;
  std::uint16_t content_objects_index_;
  std::uint16_t mask_;
  std::unique_ptr<ProducerSocket> producer_socket_;
};

void usage() {
  std::cerr << std::endl;
  std::cerr << "HIPERF - A tool for performing network throughput "
               "measurements with hICN"
            << std::endl;
  std::cerr << "usage: hiperf [-S|-C] [options] [prefix|name]" << std::endl;
  std::cerr << "Server or Client:" << std::endl;
#ifndef _WIN32
  std::cerr << "-D                          = run as a daemon" << std::endl;

#endif
  std::cerr
      << "-R                          = run RTC protocol (client or server)"
      << std::endl;
  std::cerr << "-f <ouptup_log_file>        = output log file path"
            << std::endl;
  std::cerr << std::endl;
  std::cerr << "Server specific:" << std::endl;
  std::cerr << "-A <download_size>          = size of the content to publish"
               "This is not the size of the packet (see -s for it)"
            << std::endl;
  std::cerr
      << "-s <payload_size>           = size of the payload of each data packet"
      << std::endl;
  std::cerr << "-r                          = produce real content of "
               "content_size bytes"
            << std::endl;
  std::cerr << "-m                          = produce transport manifest"
            << std::endl;
  std::cerr << "-l                          = start producing content upon the "
               "reception of the first interest"
            << std::endl;
  std::cerr << "-k <keystore_path>          = path of p12 file containing the "
               "crypto material used for signing the packets"
            << std::endl;
  std::cerr << "-y <hash_algorithm>         = use the selected hash algorithm "
               "for calculating manifest digests"
            << std::endl;
  std::cerr << "-p <password>               = password for p12 keystore"
            << std::endl;
  std::cerr
      << "-x                          = produce a content of <download_size>, "
         "then after downloading it produce a new content of"
      << std::endl;
  std::cerr << "                              <download_size> without "
               "resetting the suffix to 0"
  << std::endl;
  std::cerr << "-B	<bitrate>			    = bitrate for RTC "
               "producer, to be used with the -R option"
            << std::endl;
  std::cerr << std::endl;
  std::cerr << "Client specific:" << std::endl;
  std::cerr << "-b <beta_parameter>         = RAAQM beta parameter"
            << std::endl;
  std::cerr << "-d <drop_factor_parameter>  = RAAQM drop factor parameter"
            << std::endl;
  std::cerr << "-M                          = store the content downloaded"
               "(default false)"
            << std::endl;
  std::cerr << "-W <window_size>            = use a fixed congestion window"
               "for retrieving the data"
            << std::endl;
  std::cerr << "-c <certificate_path>       = path of the producer certificate"
               "to be used for verifying the origin of the packets received"
            << std::endl;
  std::cerr << "-i <stats_interval>         = show the statistics every "
               "<stats_interval> milliseconds"
            << std::endl;
  std::cout
      << "-v                          = Enable verification of received data"
      << std::endl;
}

int main(int argc, char *argv[]) {
#ifndef _WIN32
  // Common
  bool daemon = false;
#else
  WSADATA wsaData = {0};
  WSAStartup(MAKEWORD(2, 2), &wsaData);
#endif

  // -1 server, 0 undefined, 1 client
  int role = 0;
  int options = 0;

  char *log_file = nullptr;

  // Consumer
  ClientConfiguration client_configuration;

  // Producer
  ServerConfiguration server_configuration;

  int opt;
#ifndef _WIN32
  while ((opt = getopt(argc, argv, "DSCf:b:d:W:RMc:vA:s:rmlk:y:p:hi:xB:")) !=
         -1) {
    switch (opt) {
    // Common
    case 'D': {
      daemon = true;
      break;
    }
#else
  while ((opt = getopt(argc, argv, "SCf:b:d:W:RMc:vA:s:rmlk:y:p:hi:xB:")) !=
         -1) {
    switch (opt) {
#endif
    case 'f': {
      log_file = optarg;
      break;
    }
    case 'R': {
      client_configuration.rtc_ = true;
      server_configuration.rtc_ = true;
      break;
    }

    // Server or Client
    case 'S': {
      role -= 1;
      break;
    }
    case 'C': {
      role += 1;
      break;
    }

    // Client specifc
    case 'b': {
      client_configuration.beta = std::stod(optarg);
      options = 1;
      break;
    }
    case 'd': {
      client_configuration.drop_factor = std::stod(optarg);
      options = 1;
      break;
    }
    case 'W': {
      client_configuration.window = std::stod(optarg);
      options = 1;
      break;
    }
    case 'M': {
      client_configuration.virtual_download = false;
      options = 1;
      break;
    }
    case 'c': {
      client_configuration.producer_certificate = std::string(optarg);
      options = 1;
      break;
    }
    case 'v': {
      client_configuration.verify = true;
      options = 1;
      break;
    }
    case 'i': {
      client_configuration.report_interval_milliseconds_ = std::stoul(optarg);
      options = 1;
      break;
    }

    // Server specific
    case 'A': {
      server_configuration.download_size = std::stoul(optarg);
      options = -1;
      break;
    }
    case 's': {
      server_configuration.payload_size_ = std::stoul(optarg);
      options = -1;
      break;
    }
    case 'r': {
      server_configuration.virtual_producer = false;
      options = -1;
      break;
    }
    case 'm': {
      server_configuration.manifest = true;
      options = -1;
      break;
    }
    case 'l': {
      server_configuration.live_production = true;
      options = -1;
      break;
    }
    case 'k': {
      server_configuration.keystore_name = std::string(optarg);
      server_configuration.sign = true;
      options = -1;
      break;
    }
    case 'y': {
      if (strncasecmp(optarg, "sha256", 6) == 0) {
        server_configuration.hash_algorithm = HashAlgorithm::SHA_256;
      } else if (strncasecmp(optarg, "sha512", 6) == 0) {
        server_configuration.hash_algorithm = HashAlgorithm::SHA_512;
      } else if (strncasecmp(optarg, "crc32", 5) == 0) {
        server_configuration.hash_algorithm = HashAlgorithm::CRC32C;
      } else {
        std::cerr << "Ignored unknown hash algorithm. Using SHA 256."
                  << std::endl;
      }
      options = -1;
      break;
    }
    case 'p': {
      server_configuration.keystore_password = std::string(optarg);
      options = -1;
      break;
    }
    case 'x': {
      server_configuration.multiphase_produce_ = true;
      options = -1;
      break;
    }
    case 'B': {
      auto str = std::string(optarg);
      std::transform(str.begin(), str.end(), str.begin(), ::tolower);
      std::cout << "---------------------------------------------------------"
                   "---------------------->"
                << str << std::endl;
      server_configuration.production_rate_ = str;
      options = -1;
      break;
    }
    case 'h':
    default:
      usage();
      return EXIT_FAILURE;
    }
  }

  if (options > 0 && role < 0) {
    std::cerr << "Client options cannot be used when using the "
                 "software in server mode"
              << std::endl;
    usage();
    return EXIT_FAILURE;

  } else if (options < 0 && role > 0) {
    std::cerr << "Server options cannot be used when using the "
                 "software in client mode"
              << std::endl;
    usage();
    return EXIT_FAILURE;
  } else if (!role) {
    std::cerr << "Please specify if running hiperf as client "
                 "or server."
              << std::endl;
    usage();
    return EXIT_FAILURE;
  }

  if (argv[optind] == 0) {
    std::cerr << "Please specify the name/prefix to use." << std::endl;
    usage();
    return EXIT_FAILURE;
  } else {
    if (role > 0) {
      client_configuration.name = Name(argv[optind]);
    } else {
      server_configuration.name = Prefix(argv[optind]);
    }
  }

  if (log_file) {
#ifndef _WIN32
    int fd = open(log_file, O_WRONLY | O_APPEND | O_CREAT, S_IWUSR | S_IRUSR);
    dup2(fd, STDOUT_FILENO);
    dup2(STDOUT_FILENO, STDERR_FILENO);
    close(fd);
#else
    int fd =
        _open(log_file, _O_WRONLY | _O_APPEND | _O_CREAT, _S_IWRITE | _S_IREAD);
    _dup2(fd, _fileno(stdout));
    _dup2(_fileno(stdout), _fileno(stderr));
    _close(fd);
#endif
  }

#ifndef _WIN32
  if (daemon) {
    utils::Daemonizator::daemonize(false);
  }
#endif

  if (role > 0) {
    HIperfClient c(client_configuration);
    if (c.setup() != ERROR_SETUP) {
      c.run();
    }
  } else if (role < 0) {
    HIperfServer s(server_configuration);
    if (s.setup() != ERROR_SETUP) {
      s.run();
    }
  } else {
    usage();
    return EXIT_FAILURE;
  }

#ifdef _WIN32
  WSACleanup();
#endif
  return 0;
}

} // end namespace interface

} // end namespace transport

int main(int argc, char *argv[]) {
  return transport::interface::main(argc, argv);
}