From a17cad3404ad44bf62f173b9001dcd298193e807 Mon Sep 17 00:00:00 2001
From: Gav Wood <i@gavwood.com>
Date: Wed, 27 Aug 2014 09:37:00 +0200
Subject: [PATCH] A start.

---
 libethereum/PeerServer.h | 106 ++++++++++++++++++++++++++++++++++++++-
 1 file changed, 105 insertions(+), 1 deletion(-)

diff --git a/libethereum/PeerServer.h b/libethereum/PeerServer.h
index 5d12c807c..c38d49df4 100644
--- a/libethereum/PeerServer.h
+++ b/libethereum/PeerServer.h
@@ -40,12 +40,116 @@ namespace eth
 class RLPStream;
 class TransactionQueue;
 class BlockQueue;
+/*
+class BasePeerServer
+{
+	friend class BasePeerSession;
+
+public:
+	/// Start server, listening for connections on the given port.
+	BasePeerServer(std::string const& _clientVersion, u256 _networkId, unsigned short _port, std::string const& _publicAddress = std::string(), bool _upnp = true);
+	/// Start server, listening for connections on a system-assigned port.
+	BasePeerServer(std::string const& _clientVersion, u256 _networkId, std::string const& _publicAddress = std::string(), bool _upnp = true);
+	/// Start server, but don't listen.
+	BasePeerServer(std::string const& _clientVersion, u256 _networkId);
+
+	/// Will block on network process events.
+	virtual ~BasePeerServer();
+
+	/// Closes all peers.
+	void disconnectPeers();
+
+	virtual unsigned protocolVersion();
+
+	/// Connect to a peer explicitly.
+	void connect(std::string const& _addr, unsigned short _port = 30303) noexcept;
+	void connect(bi::tcp::endpoint const& _ep);
+
+	/// Conduct I/O, polling, syncing, whatever.
+	/// Ideally all time-consuming I/O is done in a background thread or otherwise asynchronously, but you get this call every 100ms or so anyway.
+	/// This won't touch alter the blockchain.
+	void process() { if (isInitialised()) m_ioService.poll(); }
+
+	/// @returns true iff we have the a peer of the given id.
+	bool havePeer(Public _id) const;
+
+	/// Set ideal number of peers.
+	void setIdealPeerCount(unsigned _n) { m_idealPeerCount = _n; }
+
+	/// Get peer information.
+	std::vector<PeerInfo> peers(bool _updatePing = false) const;
+
+	/// Get number of peers connected; equivalent to, but faster than, peers().size().
+	size_t peerCount() const { Guard l(x_peers); return m_peers.size(); }
+
+	/// Ping the peers, to update the latency information.
+	void pingAll();
 
+	/// Get the port we're listening on currently.
+	unsigned short listenPort() const { return m_public.port(); }
+
+	/// Serialise the set of known peers.
+	bytes savePeers() const;
+
+	/// Deserialise the data and populate the set of known peers.
+	void restorePeers(bytesConstRef _b);
+
+	void registerPeer(std::shared_ptr<PeerSession> _s);
+
+protected:
+	/// Called when the session has provided us with a new peer we can connect to.
+	void noteNewPeers() {}
+
+	void seal(bytes& _b);
+	void populateAddresses();
+	void determinePublic(std::string const& _publicAddress, bool _upnp);
+	void ensureAccepting();
+
+	void growPeers();
+	void prunePeers();
+
+	///	Check to see if the network peer-state initialisation has happened.
+	bool isInitialised() const { return m_latestBlockSent; }
+	/// Initialises the network peer-state, doing the stuff that needs to be once-only. @returns true if it really was first.
+	bool ensureInitialised(TransactionQueue& _tq);
+
+	std::map<Public, bi::tcp::endpoint> potentialPeers();
+
+	std::string m_clientVersion;
+
+	unsigned short m_listenPort;
+
+	ba::io_service m_ioService;
+	bi::tcp::acceptor m_acceptor;
+	bi::tcp::socket m_socket;
+
+	UPnP* m_upnp = nullptr;
+	bi::tcp::endpoint m_public;
+	KeyPair m_key;
+
+	u256 m_networkId;
+
+	mutable std::mutex x_peers;
+	mutable std::map<Public, std::weak_ptr<PeerSession>> m_peers;	// mutable because we flush zombie entries (null-weakptrs) as regular maintenance from a const method.
+
+	mutable std::recursive_mutex m_incomingLock;
+	std::map<Public, std::pair<bi::tcp::endpoint, unsigned>> m_incomingPeers;
+	std::vector<Public> m_freePeers;
+
+	std::chrono::steady_clock::time_point m_lastPeersRequest;
+	unsigned m_idealPeerCount = 5;
+
+	std::vector<bi::address_v4> m_addresses;
+	std::vector<bi::address_v4> m_peerAddresses;
+
+	bool m_accepting = false;
+};
+*/
 /**
  * @brief The PeerServer class
  * @warning None of this is thread-safe. You have been warned.
  */
-class PeerServer
+class PeerServer//: public BasePeerServer
 {
 	friend class PeerSession;