nfd-controller.cpp

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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
#include "nfd-controller.hpp"
#include "nfd-control-response.hpp"

namespace ndn {
namespace nfd {

const uint32_t Controller::ERROR_TIMEOUT = 10060; // WinSock ESAETIMEDOUT
const uint32_t Controller::ERROR_NACK = 10800; // 10000 + TLV-TYPE of Nack header
const uint32_t Controller::ERROR_SERVER = 500;
const uint32_t Controller::ERROR_LBOUND = 400;

Controller::Controller(Face& face, KeyChain& keyChain)
  : m_face(face)
  , m_keyChain(keyChain)
{
}

void
Controller::startCommand(const shared_ptr<ControlCommand>& command,
                         const ControlParameters& parameters,
                         const CommandSucceedCallback& onSuccess,
                         const CommandFailCallback& onFailure,
                         const CommandOptions& options)
{
  Name requestName = command->getRequestName(options.getPrefix(), parameters);
  Interest interest(requestName);
  interest.setInterestLifetime(options.getTimeout());
  m_keyChain.sign(interest, options.getSigningInfo());

  m_face.expressInterest(interest,
                         bind(&Controller::processCommandResponse, this, _2,
                              command, onSuccess, onFailure),
                         bind(onFailure, ERROR_NACK, "network Nack received"),
                         bind(onFailure, ERROR_TIMEOUT, "request timed out"));
}

void
Controller::processCommandResponse(const Data& data,
                                   const shared_ptr<ControlCommand>& command,
                                   const CommandSucceedCallback& onSuccess,
                                   const CommandFailCallback& onFailure)
{

  ControlResponse response;
  try {
    response.wireDecode(data.getContent().blockFromValue());
  }
  catch (tlv::Error& e) {
    if (static_cast<bool>(onFailure))
      onFailure(ERROR_SERVER, e.what());
    return;
  }

  uint32_t code = response.getCode();
  if (code >= ERROR_LBOUND) {
    if (static_cast<bool>(onFailure))
      onFailure(code, response.getText());
    return;
  }

  ControlParameters parameters;
  try {
    parameters.wireDecode(response.getBody());
  }
  catch (tlv::Error& e) {
    if (static_cast<bool>(onFailure))
      onFailure(ERROR_SERVER, e.what());
    return;
  }

  try {
    command->validateResponse(parameters);
  }
  catch (ControlCommand::ArgumentError& e) {
    if (static_cast<bool>(onFailure))
      onFailure(ERROR_SERVER, e.what());
    return;
  }

  if (static_cast<bool>(onSuccess))
    onSuccess(parameters);
}

} // namespace nfd
} // namespace ndn