stream-transport-with-resolver-impl.hpp
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21 
22 #ifndef NDN_TRANSPORT_STREAM_TRANSPORT_WITH_RESOLVER_IMPL_HPP
23 #define NDN_TRANSPORT_STREAM_TRANSPORT_WITH_RESOLVER_IMPL_HPP
24 
26 
27 namespace ndn {
28 
32 template<typename BaseTransport, typename Protocol>
33 class StreamTransportWithResolverImpl : public StreamTransportImpl<BaseTransport, Protocol>
34 {
35 public:
37 
38  StreamTransportWithResolverImpl(BaseTransport& transport, boost::asio::io_service& ioService)
39  : StreamTransportImpl<BaseTransport, Protocol>(transport, ioService)
40  {
41  }
42 
43  void
44  connect(const typename Protocol::resolver::query& query)
45  {
46  if (this->m_isConnecting) {
47  return;
48  }
49 
50  this->m_isConnecting = true;
51 
52  // Wait at most 4 seconds to connect
54  this->m_connectTimer.expires_from_now(boost::posix_time::seconds(4));
55  this->m_connectTimer.async_wait(bind(&Impl::connectTimeoutHandler, this->shared_from_this(), _1));
56 
57  auto resolver = make_shared<typename Protocol::resolver>(ref(this->m_socket.get_io_service()));
58  resolver->async_resolve(query, bind(&Impl::resolveHandler, this->shared_from_base(), _1, _2, resolver));
59  }
60 
61 protected:
62  void
63  resolveHandler(const boost::system::error_code& error,
64  typename Protocol::resolver::iterator endpoint,
65  const shared_ptr<typename Protocol::resolver>&)
66  {
67  if (error) {
68  if (error == boost::system::errc::operation_canceled)
69  return;
70 
71  BOOST_THROW_EXCEPTION(Transport::Error(error, "Error during resolution of host or port"));
72  }
73 
74  typename Protocol::resolver::iterator end;
75  if (endpoint == end) {
76  this->m_transport.close();
77  BOOST_THROW_EXCEPTION(Transport::Error(error, "Unable to resolve host or port"));
78  }
79 
80  this->m_socket.async_connect(*endpoint, bind(&Impl::connectHandler, this->shared_from_this(), _1));
81  }
82 
83 private:
84  shared_ptr<Impl>
85  shared_from_base()
86  {
87  return static_pointer_cast<Impl>(this->shared_from_this());
88  }
89 };
90 
91 
92 } // namespace ndn
93 
94 #endif // NDN_TRANSPORT_STREAM_TRANSPORT_WITH_RESOLVER_IMPL_HPP
void connectTimeoutHandler(const boost::system::error_code &error)
Copyright (c) 2013-2017 Regents of the University of California.
Definition: common.hpp:66
implementation detail of a Boost.Asio-based stream-oriented transport
void connect(const typename Protocol::resolver::query &query)
implementation detail of a Boost.Asio-based stream-oriented transport with resolver support ...
void resolveHandler(const boost::system::error_code &error, typename Protocol::resolver::iterator endpoint, const shared_ptr< typename Protocol::resolver > &)
boost::asio::deadline_timer m_connectTimer
void connectHandler(const boost::system::error_code &error)
StreamTransportWithResolverImpl(BaseTransport &transport, boost::asio::io_service &ioService)