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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil -*- */
/**
* Copyright (C) 2013 Regents of the University of California.
* @author: Jeff Thompson <jefft0@remap.ucla.edu>
* See COPYING for copyright and distribution information.
*/
#ifndef NDN_FACE_HPP
#define NDN_FACE_HPP
#include "node.hpp"
#include "transport/tcp-transport.hpp"
namespace ndn {
/**
* The Face class provides the main methods for NDN communication.
*/
class Face {
public:
/**
* Create a new Face for communication with an NDN hub with the given Transport object and connectionInfo.
* @param transport A shared_ptr to a Transport object used for communication.
* @param transport A shared_ptr to a Transport::ConnectionInfo to be used to connect to the transport.
*/
Face(const ptr_lib::shared_ptr<Transport>& transport, const ptr_lib::shared_ptr<const Transport::ConnectionInfo>& connectionInfo)
: node_(transport, connectionInfo)
{
}
/**
* Create a new Face for communication with an NDN hub at host:port using the default TcpTransport.
* @param host The host of the NDN hub.
* @param port The port of the NDN hub. If omitted. use 6363.
*/
Face(const char *host, unsigned short port = 6363)
: node_(ptr_lib::make_shared<TcpTransport>(),
ptr_lib::make_shared<TcpTransport::ConnectionInfo>(host, port))
{
}
/**
* Send the Interest through the transport, read the entire response and call onData(interest, data).
* @param interest A reference to the Interest. This copies the Interest.
* @param onData A function object to call when a matching data packet is received. This copies the function object, so you may need to
* use func_lib::ref() as appropriate.
* @param onTimeout A function object to call if the interest times out. If onTimeout is an empty OnTimeout(), this does not use it.
* This copies the function object, so you may need to use func_lib::ref() as appropriate.
* @param wireFormat A WireFormat object used to encode the message. If omitted, use WireFormat getDefaultWireFormat().
* @return The pending interest ID which can be used with removePendingInterest.
*/
uint64_t
expressInterest
(const Interest& interest, const OnData& onData, const OnTimeout& onTimeout = OnTimeout(),
WireFormat& wireFormat = *WireFormat::getDefaultWireFormat())
{
return node_.expressInterest(interest, onData, onTimeout, wireFormat);
}
/**
* Encode name as an Interest. If interestTemplate is not 0, use its interest selectors.
* Send the interest through the transport, read the entire response and call onData(interest, data).
* @param name A reference to a Name for the interest. This copies the Name.
* @param interestTemplate if not 0, copy interest selectors from the template. This does not keep a pointer to the Interest object.
* @param onData A function object to call when a matching data packet is received. This copies the function object, so you may need to
* use func_lib::ref() as appropriate.
* @param onTimeout A function object to call if the interest times out. If onTimeout is an empty OnTimeout(), this does not use it.
* This copies the function object, so you may need to use func_lib::ref() as appropriate.
* @param wireFormat A WireFormat object used to encode the message. If omitted, use WireFormat getDefaultWireFormat().
* @return The pending interest ID which can be used with removePendingInterest.
*/
uint64_t
expressInterest
(const Name& name, const Interest *interestTemplate, const OnData& onData, const OnTimeout& onTimeout = OnTimeout(),
WireFormat& wireFormat = *WireFormat::getDefaultWireFormat());
/**
* Encode name as an Interest, using a default interest lifetime.
* Send the interest through the transport, read the entire response and call onData(interest, data).
* @param name A reference to a Name for the interest. This copies the Name.
* @param onData A function object to call when a matching data packet is received. This copies the function object, so you may need to
* use func_lib::ref() as appropriate.
* @param onTimeout A function object to call if the interest times out. If onTimeout is an empty OnTimeout(), this does not use it.
* This copies the function object, so you may need to use func_lib::ref() as appropriate.
* @param wireFormat A WireFormat object used to encode the message. If omitted, use WireFormat getDefaultWireFormat().
* @return The pending interest ID which can be used with removePendingInterest.
*/
uint64_t
expressInterest
(const Name& name, const OnData& onData, const OnTimeout& onTimeout = OnTimeout(),
WireFormat& wireFormat = *WireFormat::getDefaultWireFormat())
{
return expressInterest(name, 0, onData, onTimeout, wireFormat);
}
/**
* Remove the pending interest entry with the pendingInterestId from the pending interest table.
* This does not affect another pending interest with a different pendingInterestId, even it if has the same interest name.
* If there is no entry with the pendingInterestId, do nothing.
* @param pendingInterestId The ID returned from expressInterest.
*/
void
removePendingInterest(uint64_t pendingInterestId)
{
node_.removePendingInterest(pendingInterestId);
}
/**
* Register prefix with the connected NDN hub and call onInterest when a matching interest is received.
* @param prefix A reference to a Name for the prefix to register. This copies the Name.
* @param onInterest A function object to call when a matching interest is received. This copies the function object, so you may need to
* use func_lib::ref() as appropriate.
* @param onRegisterFailed A function object to call if failed to retrieve the connected hub’s ID or failed to register the prefix.
* This calls onRegisterFailed(prefix) where prefix is the prefix given to registerPrefix.
* @param flags The flags for finer control of which interests are forward to the application. If omitted, use
* the default flags defined by the default ForwardingFlags constructor.
* @param wireFormat A WireFormat object used to encode the message. If omitted, use WireFormat getDefaultWireFormat().
* @return The registered prefix ID which can be used with removeRegisteredPrefix.
*/
uint64_t
registerPrefix
(const Name& prefix, const OnInterest& onInterest, const OnRegisterFailed& onRegisterFailed, const ForwardingFlags& flags = ForwardingFlags(),
WireFormat& wireFormat = *WireFormat::getDefaultWireFormat())
{
return node_.registerPrefix(prefix, onInterest, onRegisterFailed, flags, wireFormat);
}
/**
* Remove the registered prefix entry with the registeredPrefixId from the pending interest table.
* This does not affect another registered prefix with a different registeredPrefixId, even it if has the same prefix name.
* If there is no entry with the registeredPrefixId, do nothing.
* @param registeredPrefixId The ID returned from registerPrefix.
*/
void
removeRegisteredPrefix(uint64_t registeredPrefixId)
{
node_.removeRegisteredPrefix(registeredPrefixId);
}
/**
* Process any data to receive or call timeout callbacks.
* This is non-blocking and will return immediately if there is no data to receive.
* You should repeatedly call this from an event loop, with calls to sleep as needed so that the loop doesn't use 100% of the CPU.
* @throw This may throw an exception for reading data or in the callback for processing the data. If you
* call this from an main event loop, you may want to catch and log/disregard all exceptions.
*/
void
processEvents()
{
// Just call Node's processEvents.
node_.processEvents();
}
/**
* Shut down and disconnect this Face.
*/
void
shutdown();
private:
Node node_;
};
}
#endif