browse_server_generic.cpp

这是一款2d游戏引擎

/*  $Id: browse_server_generic.cpp,v 1.9 2003/11/11 10:13:25 grumbel Exp $
**
**  ClanLib Game SDK
**  Copyright (C) 2003  The ClanLib Team
**  For a total list of contributers see the file CREDITS.
**
**  This library is free software; you can redistribute it and/or
**  modify it under the terms of the GNU Lesser General Public
**  License as published by the Free Software Foundation; either
**  version 2.1 of the License, or (at your option) any later version.
**
**  This library 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
**  Lesser General Public License for more details.
**
**  You should have received a copy of the GNU Lesser General Public
**  License along with this library; if not, write to the Free Software
**  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA
**
*/

#ifdef _MSC_VER
#pragma warning (disable:4786)
#endif

#include "browse_server_generic.h"
#include "API/Core/IOData/outputsource_memory.h"
#include "API/Core/System/clanstring.h"
#include "API/Core/System/error.h"

/////////////////////////////////////////////////////////////////////////////
// CL_BrowseServer_Generic construction:

CL_BrowseServer_Generic::CL_BrowseServer_Generic(
	const std::string &app_id,
	const CL_IPAddress &server_address)
	: app_id(app_id), server_address(server_address), sock(CL_Socket::tcp), sock_udp(CL_Socket::udp), connected(false)
{
}

CL_BrowseServer_Generic::~CL_BrowseServer_Generic()
{
}

/////////////////////////////////////////////////////////////////////////////
// CL_BrowseServer_Generic attributes:

/////////////////////////////////////////////////////////////////////////////
// CL_BrowseServer_Generic operations:

void CL_BrowseServer_Generic::set_description(const CL_NetPacket &new_description)
{
	description = new_description;

	if (connected) sock.output.write_string(
		std::string((char *) description.get_data(), description.get_size()));
}

void CL_BrowseServer_Generic::connect(const CL_IPAddress &browse_master)
{
	sock.connect(browse_master);

	sock.output.write_string(app_id);
	sock.output.write_int32(0); // we are a server
	sock.output.write_string(server_address.get_port());
	sock.output.write_string(std::string((char *) description.get_data(), description.get_size()));

	connected = true;
}

void CL_BrowseServer_Generic::listen(const std::string &port)
{
	// NOTE: This is IPV4 compatible only. For IPV6, multicasting should be used
	// bind to the given port
	sock_udp.bind(CL_IPAddress(port));

	// connect recive signal to slot
	slot_recv = sock_udp.sig_read_triggered().connect(this, &CL_BrowseServer_Generic::on_udp_recv);
}

/////////////////////////////////////////////////////////////////////////////
// CL_BrowseServer_Generic implementation:

void CL_BrowseServer_Generic::on_udp_recv()
{
	// NetPacket for receiving data packets
	char buffer[16*1024];
	CL_IPAddress ip_add;

	// only recieving data less than or equal to size of 16*1024
	int size = sock_udp.recv(buffer, sizeof(buffer), ip_add);

	CL_NetPacket recv_packet(buffer, size);

	try
	{
		if (app_id == recv_packet.input.read_string()) // match!!!
		{
			if (1 == recv_packet.input.read_int32()) // It's a client!
			{
				CL_NetPacket packet;

				packet.output.write_string(app_id);
				packet.output.write_int32(0); // we are a server
				packet.output.write_string(server_address.get_port());
				packet.output.write_string(std::string((char *) description.get_data(), description.get_size()));

				sock_udp.send(packet.get_data(), packet.get_size(), ip_add);
			}
		}
	}
	catch(CL_Error err)
	{
		// DO NOTHING
	}
}