| /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */ |
| /** |
| * Copyright (C) 2014 Named Data Networking Project |
| * See COPYING for copyright and distribution information. |
| */ |
| |
| #ifndef NFD_FACE_STREAM_FACE_HPP |
| #define NFD_FACE_STREAM_FACE_HPP |
| |
| #include "face.hpp" |
| |
| namespace nfd { |
| |
| template <class T> |
| class StreamFace : public Face |
| { |
| public: |
| typedef T protocol; |
| |
| /** |
| * \brief Create instance of StreamFace |
| */ |
| StreamFace(const shared_ptr<typename protocol::socket>& socket); |
| |
| virtual |
| ~StreamFace(); |
| |
| // from Face |
| virtual void |
| sendInterest(const Interest& interest); |
| |
| virtual void |
| sendData(const Data& data); |
| |
| virtual void |
| close(); |
| |
| protected: |
| void |
| handleSend(const boost::system::error_code& error, |
| const Block& wire); |
| |
| void |
| handleReceive(const boost::system::error_code& error, |
| std::size_t bytes_recvd); |
| |
| void |
| keepFaceAliveUntilAllHandlersExecuted(const shared_ptr<Face>& face); |
| |
| void |
| closeSocket(); |
| |
| protected: |
| shared_ptr<typename protocol::socket> m_socket; |
| |
| private: |
| uint8_t m_inputBuffer[MAX_NDN_PACKET_SIZE]; |
| std::size_t m_inputBufferSize; |
| |
| NFD_LOG_INCLASS_DECLARE(); |
| }; |
| |
| // All inherited classes must use |
| // NFD_LOG_INCLASS_TEMPLATE_SPECIALIZATION_DEFINE(StreamFace, <specialization-parameter>, "Name"); |
| |
| template <class T> |
| inline |
| StreamFace<T>::StreamFace(const shared_ptr<typename StreamFace::protocol::socket>& socket) |
| : m_socket(socket) |
| , m_inputBufferSize(0) |
| { |
| m_socket->async_receive(boost::asio::buffer(m_inputBuffer, MAX_NDN_PACKET_SIZE), 0, |
| bind(&StreamFace<T>::handleReceive, this, _1, _2)); |
| } |
| |
| template <class T> |
| inline |
| StreamFace<T>::~StreamFace() |
| { |
| } |
| |
| |
| template <class T> |
| inline void |
| StreamFace<T>::sendInterest(const Interest& interest) |
| { |
| m_socket->async_send(boost::asio::buffer(interest.wireEncode().wire(), |
| interest.wireEncode().size()), |
| bind(&StreamFace<T>::handleSend, this, _1, interest.wireEncode())); |
| |
| // anything else should be done here? |
| } |
| |
| template <class T> |
| inline void |
| StreamFace<T>::sendData(const Data& data) |
| { |
| m_socket->async_send(boost::asio::buffer(data.wireEncode().wire(), |
| data.wireEncode().size()), |
| bind(&StreamFace<T>::handleSend, this, _1, data.wireEncode())); |
| |
| // anything else should be done here? |
| } |
| |
| template <class T> |
| inline void |
| StreamFace<T>::close() |
| { |
| if (!m_socket->is_open()) |
| return; |
| |
| NFD_LOG_INFO("[id:" << this->getId() |
| << ",endpoint:" << m_socket->local_endpoint() |
| << "] Close connection"); |
| |
| closeSocket(); |
| onFail("Close connection"); |
| } |
| |
| template <class T> |
| inline void |
| StreamFace<T>::handleSend(const boost::system::error_code& error, |
| const Block& wire) |
| { |
| if (error) { |
| if (error == boost::system::errc::operation_canceled) // when socket is closed by someone |
| return; |
| |
| if (!m_socket->is_open()) |
| { |
| onFail("Connection closed"); |
| return; |
| } |
| |
| if (error == boost::asio::error::eof) |
| { |
| NFD_LOG_INFO("[id:" << this->getId() |
| << ",endpoint:" << m_socket->local_endpoint() |
| << "] Connection closed"); |
| } |
| else |
| { |
| NFD_LOG_WARN("[id:" << this->getId() |
| << ",endpoint:" << m_socket->local_endpoint() |
| << "] Send operation failed, closing socket: " |
| << error.category().message(error.value())); |
| } |
| |
| closeSocket(); |
| |
| if (error == boost::asio::error::eof) |
| { |
| onFail("Connection closed"); |
| } |
| else |
| { |
| onFail("Send operation failed, closing socket: " + |
| error.category().message(error.value())); |
| } |
| return; |
| } |
| |
| NFD_LOG_TRACE("[id:" << this->getId() |
| << ",endpoint:" << m_socket->local_endpoint() |
| << "] Successfully sent: " << wire.size() << " bytes"); |
| // do nothing (needed to retain validity of wire memory block |
| } |
| |
| template <class T> |
| inline void |
| StreamFace<T>::handleReceive(const boost::system::error_code& error, |
| std::size_t bytes_recvd) |
| { |
| if (error || bytes_recvd == 0) { |
| if (error == boost::system::errc::operation_canceled) // when socket is closed by someone |
| return; |
| |
| // this should be unnecessary, but just in case |
| if (!m_socket->is_open()) |
| { |
| onFail("Connection closed"); |
| return; |
| } |
| |
| if (error == boost::asio::error::eof) |
| { |
| NFD_LOG_INFO("[id:" << this->getId() |
| << ",endpoint:" << m_socket->local_endpoint() |
| << "] Connection closed"); |
| } |
| else |
| { |
| NFD_LOG_WARN("[id:" << this->getId() |
| << ",endpoint:" << m_socket->local_endpoint() |
| << "] Receive operation failed: " |
| << error.category().message(error.value())); |
| } |
| |
| closeSocket(); |
| |
| if (error == boost::asio::error::eof) |
| { |
| onFail("Connection closed"); |
| } |
| else |
| { |
| onFail("Receive operation failed, closing socket: " + |
| error.category().message(error.value())); |
| } |
| return; |
| } |
| |
| NFD_LOG_TRACE("[id:" << this->getId() |
| << ",endpoint:" << m_socket->local_endpoint() |
| << "] Received: " << bytes_recvd << " bytes"); |
| |
| m_inputBufferSize += bytes_recvd; |
| // do magic |
| |
| std::size_t offset = 0; |
| /// @todo Eliminate reliance on exceptions in this path |
| try { |
| while(m_inputBufferSize - offset > 0) |
| { |
| Block element(m_inputBuffer + offset, m_inputBufferSize - offset); |
| offset += element.size(); |
| |
| BOOST_ASSERT(offset <= m_inputBufferSize); |
| |
| /// @todo Ensure lazy field decoding process |
| if (element.type() == tlv::Interest) |
| { |
| shared_ptr<Interest> i = make_shared<Interest>(); |
| i->wireDecode(element); |
| onReceiveInterest(*i); |
| } |
| else if (element.type() == tlv::Data) |
| { |
| shared_ptr<Data> d = make_shared<Data>(); |
| d->wireDecode(element); |
| onReceiveData(*d); |
| } |
| // @todo Add local header support |
| // else if (element.type() == tlv::LocalHeader) |
| // { |
| // shared_ptr<Interest> i = make_shared<Interest>(); |
| // i->wireDecode(element); |
| // } |
| else |
| { |
| NFD_LOG_WARN("[id:" << this->getId() |
| << ",endpoint:" << m_socket->local_endpoint() |
| << "] Received unrecognized block of type [" |
| << element.type() << "]"); |
| // ignore unknown packet and proceed |
| } |
| } |
| } |
| catch(const tlv::Error& e) { |
| if (m_inputBufferSize == MAX_NDN_PACKET_SIZE && offset == 0) |
| { |
| NFD_LOG_WARN("[id:" << this->getId() |
| << ",endpoint:" << m_socket->local_endpoint() |
| << "] Received input is invalid or too large to process, " |
| << "closing down the face"); |
| |
| closeSocket(); |
| onFail("Received input is invalid or too large to process, closing down the face"); |
| return; |
| } |
| } |
| |
| if (offset > 0) |
| { |
| if (offset != m_inputBufferSize) |
| { |
| std::copy(m_inputBuffer + offset, m_inputBuffer + m_inputBufferSize, |
| m_inputBuffer); |
| m_inputBufferSize -= offset; |
| } |
| else |
| { |
| m_inputBufferSize = 0; |
| } |
| } |
| |
| m_socket->async_receive(boost::asio::buffer(m_inputBuffer + m_inputBufferSize, |
| MAX_NDN_PACKET_SIZE - m_inputBufferSize), 0, |
| bind(&StreamFace<T>::handleReceive, this, _1, _2)); |
| } |
| |
| template <class T> |
| inline void |
| StreamFace<T>::keepFaceAliveUntilAllHandlersExecuted(const shared_ptr<Face>& face) |
| { |
| } |
| |
| template <class T> |
| inline void |
| StreamFace<T>::closeSocket() |
| { |
| boost::asio::io_service& io = m_socket->get_io_service(); |
| |
| // use the non-throwing variants and ignore errors, if any |
| boost::system::error_code error; |
| m_socket->shutdown(protocol::socket::shutdown_both, error); |
| m_socket->close(error); |
| // after this, handlers will be called with an error code |
| |
| // ensure that the Face object is alive at least until all pending |
| // handlers are dispatched |
| io.post(bind(&StreamFace<T>::keepFaceAliveUntilAllHandlersExecuted, |
| this, this->shared_from_this())); |
| } |
| |
| } // namespace nfd |
| |
| #endif // NFD_FACE_STREAM_FACE_HPP |