SimpleMUD/ConnectionManager.h at master · Ckkk112138/SimpleMUD · GitHub

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#ifndef CONNECTIONMANAGER_H
#define CONNECTIONMANAGER_H

#include <list>
#include <iostream>
#include "ThreadLib.h"
#include "SocketLibTypes.h"
#include"SocketLibErrors.h"
#include "Connection.h"
#include "SocketSet.h"

namespace SocketLib
{
	template<typename protocol>
	class Connection;

	template<typename protocol,typename defaulthandler>
	class ConnectionManager
	{
	public:
		typedef std::list<Connection<protocol>> clist;
		typedef typename std::list<Connection<protocol>>::iterator clistitr;

		ConnectionManager(int p_maxdatarate = 1024,
			int p_sendtimeout = 60, int p_maxbuffered = 8192);
		~ConnectionManager();
		void NewConnection(DataSocket& p_socket);
		inline int AvailableConnections() const
		{
			return MAX - (int)m_connections.size();
		}

		inline int TotalConnections() const
		{
			return (int)m_connections.size();
		}

		void CloseConnections();
		void Listen();
		void Send();

		inline void Manage()
		{
			Listen();
			Send();
			CloseConnections();
		}
	protected:
		void Close(clistitr p_itr);
		clist m_connections;
		int m_maxdatarate;
		int m_sendtimeout;
		int m_maxbuffered;

		SocketSet m_set;
	};

	template<typename protocol, typename defaulthandler>
	ConnectionManager<protocol, defaulthandler>::ConnectionManager(int p_maxdatarate,
		int p_sendtimeout, int p_maxbuffered):
		m_maxdatarate(p_maxdatarate),m_sendtimeout(p_sendtimeout),
		m_maxbuffered(p_maxbuffered)

	{

	}

	template<typename protocol, typename defaulthandler>
	ConnectionManager<protocol, defaulthandler>::~ConnectionManager()
	{
		clistitr itr;
		for (itr = m_connections.begin(); itr != m_connections.end(); ++itr)
		{
			itr->CloseSocket();
		}
	}

	template<typename protocol, typename defaulthandler>
	void ConnectionManager<protocol,defaulthandler>::
		NewConnection(DataSocket& p_socket)
	{
		Connection<protocol> conn(p_socket);
		if (AvailableConnections() == 0)
		{
			defaulthandler::NoRoom(conn);
			conn.CloseSocket();
		}
		else
		{

			m_connections.push_back(conn);
			Connection<protocol>& c = *m_connections.rbegin();
			c.SetBlocking(false);
			m_set.AddSocket(c);

			// may be better? -- for "new"
			c.AddHandler(new defaulthandler(c));
		}
	}

	template<typename protocol, typename defaulthandler>
	void ConnectionManager<protocol, defaulthandler>::Close(clistitr p_itr)
	{
		m_set.RemoveSocket(*p_itr);
		p_itr->CloseSocket();
		m_connections.erase(p_itr);
	}

	template<typename protocol, typename defaulthandler>
	void ConnectionManager<protocol, defaulthandler>::Listen()
	{
		int socks = 0;
		if (TotalConnections() > 0)
		{
			socks = m_set.Poll();
		}

		// any activity?
		if (socks > 0)
		{
			clistitr itr = m_connections.begin();
			clistitr c;
			while (itr != m_connections.end())
			{
				c = itr++;
				if (m_set.HasActivity(*c))
				{
					try
					{
						c->Receive();
						if (c->GetCurrentDataRate() > m_maxdatarate)
						{
							c->Close();
							c->Handler()->Flooded();
							Close(c);
						}
					}
					catch (...)
					{
						c->Close();
						c->Handler()->Hungup();
						Close(c);
					}
				}
			}
		}

	}

	template<typename protocol, typename defaulthandler>
	void ConnectionManager<protocol, defaulthandler>::Send()
	{
		clistitr itr = m_connections.begin();
		clistitr c;
		while (itr != m_connections.end())
		{
			c = itr++;
			try
			{
				c->SendBuffer();
				if (c->GetBufferedBytes() > m_maxbuffered ||
					c->GetLastSendTime() > m_sendtimeout)
				{
					c->Close();
					c->Handler()->Hungup();
					Close(c);
				}
			}
			catch (...)
			{
				c->Close();
				c->Handler()->Hungup();
				Close(c);
			}
		}
	}

	template<typename protocol, typename defaulthandler>
	void ConnectionManager<protocol, defaulthandler>::CloseConnections()
	{
		clistitr itr = m_connections.begin();
		clistitr c;
		while (itr != m_connections.end())
		{
			c = itr++;
			if(c->Closed())
			{
				Close(c);
			}
		}
	}
}
#endif // !CONNECTIONMANAGER_H