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initial interface for udp. test sending/receiving udp.

cl-refactor
subtly 10 years ago
parent
71bf6e7ede
commit
cef5c1a843
6 changed files with 262 additions and 136 deletions
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  1. 6
      libp2p/Network.cpp
  2. 93
      libp2p/Network.h
  3. 20
      libp2p/UDP.cpp
  4. 181
      libp2p/UDP.h
  5. 12
      test/kademlia.cpp
  6. 86
      test/net.cpp

6
libp2p/Network.cpp
View File

@ -38,12 +38,6 @@ using namespace std;
using namespace dev;
using namespace dev::p2p;
template <class T>
Socket<T>::Socket(SocketEventFace* _seface): m_eventDelegate(_seface), m_socket(m_eventDelegate->ioService()) {}
template <class T>
Socket<T>::Socket(SocketEventFace* _seface, endpointType _endpoint): m_eventDelegate(_seface), m_socket(m_eventDelegate->ioService(), _endpoint) {}
std::vector<bi::address> Network::getInterfaceAddresses()
{
std::vector<bi::address> addresses;

93
libp2p/Network.h
View File

@ -25,6 +25,7 @@
#include <memory>
#include <vector>
#include <deque>
#include <array>
#include <libdevcore/RLP.h>
#include <libdevcore/Guards.h>
#include "Common.h"
@ -46,98 +47,6 @@ struct NetworkPreferences
bool localNetworking = false;
};
struct Packet
{
bytes payload() const { return s.out(); }
bool required = false;
RLPStream s;
};
class SocketFace
{
virtual void send(Packet const& _msg) = 0;
};
class SocketEventFace;
/**
* @brief Generic Socket Interface
* Owners of sockets must outlive the socket.
* Boost ASIO uses lowercase template for udp/tcp, which is adopted here.
*/
template <class T>
class Socket: SocketFace, public std::enable_shared_from_this<Socket<T>>
{
public:
using socketType = typename T::socket;
using endpointType = typename T::endpoint;
Socket(SocketEventFace* _seface);
Socket(SocketEventFace* _seface, endpointType _endpoint);
protected:
void send(Packet const& _msg)
{
if (!m_started)
return;
Guard l(x_sendQ);
sendQ.push_back(_msg.payload());
if (sendQ.size() == 1 && !m_stopped)
doWrite();
}
void doWrite()
{
const bytes& bytes = sendQ[0];
auto self(Socket<T>::shared_from_this());
// boost::asio::async_write(m_socket, boost::asio::buffer(bytes), [this, self](boost::system::error_code _ec, std::size_t /*length*/)
// {
// if (_ec)
// return stopWithError(_ec);
// else
// {
// Guard l(x_sendQ);
// sendQ.pop_front();
// if (sendQ.empty())
// return;
// }
// doWrite();
// });
}
void stopWithError(boost::system::error_code _ec);
std::atomic<bool> m_stopped; ///< Set when connection is stopping or stopped. Handshake cannot occur unless m_stopped is true.
std::atomic<bool> m_started; ///< Atomically ensure connection is started once. Start cannot occur unless m_started is false. Managed by start() and shutdown(bool).
SocketEventFace* m_eventDelegate = nullptr;
Mutex x_sendQ;
std::deque<bytes> sendQ;
bytes recvBuffer;
size_t recvdBytes = 0;
socketType m_socket;
Mutex x_socketError; ///< Mutex for error which can occur from host or IO thread.
boost::system::error_code socketError; ///< Set when shut down due to error.
};
class SocketEventFace
{
public:
virtual ba::io_service& ioService() = 0;
virtual void onStopped(SocketFace*) = 0;
virtual void onReceive(SocketFace*, Packet&) = 0;
};
struct UDPSocket: public Socket<bi::udp>
{
UDPSocket(ba::io_service& _io, unsigned _port): Socket<bi::udp>(nullptr, bi::udp::endpoint(bi::udp::v4(), _port)) {}
~UDPSocket() { boost::system::error_code ec; m_socket.shutdown(bi::udp::socket::shutdown_both, ec); m_socket.close(); }
// bi::udp::socket m_socket;
};
/**
* @brief Network Class
* Static network operations and interface(s).

20
libp2p/UDP.cpp
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@ -0,0 +1,20 @@
/*
This file is part of cpp-ethereum.
cpp-ethereum is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
cpp-ethereum is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with cpp-ethereum. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file UDP.cpp
* @author Alex Leverington <nessence@gmail.com>
* @date 2014
*/

181
libp2p/UDP.h
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@ -0,0 +1,181 @@
/*
This file is part of cpp-ethereum.
cpp-ethereum is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
cpp-ethereum is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with cpp-ethereum. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file UDP.h
* @author Alex Leverington <nessence@gmail.com>
* @date 2014
*/
#pragma once
#include <memory>
#include <vector>
#include <deque>
#include <array>
#include <libdevcore/Guards.h>
#include "Common.h"
namespace ba = boost::asio;
namespace bi = ba::ip;
namespace dev
{
namespace p2p
{
struct UDPDatagram
{
bi::udp::endpoint to;
bytes data;
};
struct UDPSocketFace
{
virtual void send(UDPDatagram const& _msg) = 0;
virtual void disconnect() = 0;
};
struct UDPSocketEvents
{
virtual void onDisconnected(UDPSocketFace*) {};
virtual void onReceived(UDPSocketFace*, bi::udp::endpoint const& _from, bytesConstRef _packetData) = 0;
};
/**
* @brief UDP Interface
* Handler must implement UDPSocketEvents. S is maximum data size (bytes) of UDP datagram.
*/
template <typename Handler, unsigned S>
class UDPSocket: UDPSocketFace, public std::enable_shared_from_this<UDPSocket<Handler, S>>
{
public:
static constexpr unsigned datagramSize = S;
static_assert(datagramSize < 65507, "UDP datagrams cannot be larger than 65507 bytes");
/// Construct open socket to endpoint.
UDPSocket(ba::io_service& _io, Handler& _host, unsigned _port): m_host(_host), m_socket(_io, bi::udp::endpoint(bi::udp::v4(), _port)) {};
virtual ~UDPSocket() { disconnect(); }
void connect()
{
bool no = false;
if (!m_started.compare_exchange_strong(no, true))
return;
m_closed = false;
doRead();
}
void send(UDPDatagram const& _datagram)
{
if (!m_started)
return;
Guard l(x_sendQ);
sendQ.push_back(_datagram);
if (sendQ.size() == 1 && !m_closed)
doWrite();
}
void disconnect() { disconnectWithError(boost::asio::error::connection_reset); }
protected:
void doRead()
{
auto self(UDPSocket<Handler, S>::shared_from_this());
m_socket.async_receive_from(boost::asio::buffer(recvData), recvEndpoint, [this, self](boost::system::error_code _ec, size_t _len)
{
if (_ec)
return disconnectWithError(_ec);
assert(_len);
m_host.onReceived(this, recvEndpoint, bytesConstRef(recvData.data(), _len));
if (!m_closed)
doRead();
});
}
void doWrite()
{
const UDPDatagram& datagram = sendQ[0];
auto self(UDPSocket<Handler, S>::shared_from_this());
m_socket.async_send_to(boost::asio::buffer(datagram.data), datagram.to, [this, self](boost::system::error_code _ec, std::size_t)
{
if (_ec)
return disconnectWithError(_ec);
else
{
Guard l(x_sendQ);
sendQ.pop_front();
if (sendQ.empty())
return;
}
doWrite();
});
}
void disconnectWithError(boost::system::error_code _ec)
{
// If !started and already stopped, shutdown has already occured. (EOF or Operation canceled)
if (!m_started && m_closed)
return;
assert(_ec);
{
// disconnect-operation following prior non-zero errors are ignored
Guard l(x_socketError);
if (socketError != boost::system::error_code())
return;
socketError = _ec;
}
// TODO: (if non-zero error) schedule high-priority writes
// prevent concurrent disconnect
bool yes = true;
if (!m_started.compare_exchange_strong(yes, false))
return;
// set m_closed to true to prevent undeliverable egress messages
bool wasClosed = m_closed;
m_closed = true;
// close sockets
boost::system::error_code ec;
m_socket.shutdown(bi::udp::socket::shutdown_both, ec);
m_socket.close();
// socket never started if it never left stopped-state (pre-handshake)
if (wasClosed)
return;
m_host.onDisconnected(this);
}
std::atomic<bool> m_closed; ///< Set when connection is stopping or stopped. Handshake cannot occur unless m_closed is true.
std::atomic<bool> m_started; ///< Atomically ensure connection is started once. Start cannot occur unless m_started is false. Managed by start and disconnectWithError.
Handler& m_host; ///< Interface which owns this socket.
Mutex x_sendQ;
std::deque<UDPDatagram> sendQ;
std::array<byte, datagramSize> recvData; ///< Buffer for ingress datagrams.
bi::udp::endpoint recvEndpoint; ///< Endpoint data was received from.
bi::udp::socket m_socket;
Mutex x_socketError; ///< Mutex for error which can occur from host or IO thread.
boost::system::error_code socketError; ///< Set when shut down due to error.
};
}
}

12
test/kademlia.cpp
View File

@ -17,17 +17,5 @@
/** @file kademlia.cpp
* @author Alex Leverington <nessence@gmail.com>
* @date 2014
* Basic networking tests
*/
#include <boost/test/unit_test.hpp>
#include <libp2p/Common.h>
using namespace std;
using namespace dev;
using namespace dev::p2p;
BOOST_AUTO_TEST_CASE(host_listen_udp4)
{
}

86
test/net.cpp
View File

@ -14,42 +14,76 @@
You should have received a copy of the GNU General Public License
along with cpp-ethereum. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file network.cpp
* @author Marko Simovic <markobarko@gmail.com>
/** @file net.cpp
* @author Alex Leverington <nessence@gmail.com>
* @date 2014
* Basic networking tests
*/
#include <boost/test/unit_test.hpp>
#include <boost/filesystem/operations.hpp>
#include <libethereum/Client.h>
#include <libethereum/BlockChain.h>
#include <libethereum/EthereumHost.h>
#include "TestHelper.h"
#include <libdevcore/Worker.h>
#include <libp2p/UDP.h>
using namespace std;
using namespace dev;
using namespace dev::eth;
using namespace dev::p2p;
namespace ba = boost::asio;
namespace bi = ba::ip;
// Disabled since tests shouldn't block (not the worst offender, but timeout should be reduced anyway).
/*
BOOST_AUTO_TEST_CASE(listen_port_busy)
class TestA: UDPSocketEvents, public Worker
{
short port = 20000;
public:
TestA(): Worker("test",0), m_io(), m_socket(new UDPSocket<TestA, 1024>(m_io, *this, 30300)) {}
~TestA() { m_io.stop(); stopWorking(); }
void start() { startWorking(); }
void doWork() { m_io.run(); }
void onDisconnected(UDPSocketFace*) {};
void onReceived(UDPSocketFace*, bi::udp::endpoint const& _from, bytesConstRef _packet) { if(_packet.toString() == "AAAA") success = true; };
//make use of the port ahead of our client
ba::io_service ioService;
bi::tcp::endpoint endPoint(bi::tcp::v4(), port);
bi::tcp::acceptor acceptor(ioService, endPoint);
acceptor.listen(10);
ba::io_service m_io;
shared_ptr<UDPSocket<TestA, 1024>> m_socket;
bool success = false;
};
//prepare client and try to listen on same, used, port
Client c1("TestClient1", KeyPair::create().address(),
(boost::filesystem::temp_directory_path() / boost::filesystem::unique_path()).string());
//struct TestBProtocol: UDPSocketEvents
//{
// void onDisconnected(UDPSocketFace*) {};
// void onReceived(UDPSocketFace*, bi::udp::endpoint const& _from, bytesConstRef _packet) { cout << "received TestBProtocol" << endl; };
//};
//
//class TestB: TestBProtocol
//{
//public:
// TestB(): m_io(), m_socket(m_io, *this, 30300) {}
////private:
// ba::io_service m_io;
// UDPSocket<TestBProtocol, 1024> m_socket;
//};
//
//class TestC
//{
//public:
// TestC(): m_io(), m_socket(m_io, m_rpc, 30300) {}
////private:
// ba::io_service m_io;
// TestBProtocol m_rpc;
// UDPSocket<TestBProtocol, 1024> m_socket;
//};
c1.startNetwork(port);
BOOST_AUTO_TEST_SUITE(p2p)
BOOST_REQUIRE(c1.haveNetwork());
BOOST_REQUIRE(c1.peerServer()->listenPort() != 0);
BOOST_REQUIRE(c1.peerServer()->listenPort() != port);
BOOST_AUTO_TEST_CASE(test)
{
UDPDatagram d;
d.to = boost::asio::ip::udp::endpoint(boost::asio::ip::address::from_string("127.0.0.1"), 30300);
d.data = bytes({65,65,65,65});
TestA a; a.start(); a.m_socket->connect();
a.m_socket->send(d);
sleep(1);
BOOST_REQUIRE_EQUAL(true, a.success);
}
*/
BOOST_AUTO_TEST_SUITE_END()

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