//     ____                _       __               
//    / __ )____  _____   | |     / /___ ___________
//   / __  / __ \/ ___/   | | /| / / __ `/ ___/ ___/
//  / /_/ / /_/ (__  )    | |/ |/ / /_/ / /  (__  ) 
// /_____/\____/____/     |__/|__/\__,_/_/  /____/  
//                                              
//       A futuristic real-time strategy game.
//          This file is part of Bos Wars.
//
/**@name net_lowlevel.h - The network low level header file. */
//
//      (c) Copyright 1998-2007 by Lutz Sammer and Jimmy Salmon
//
//      This program 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; only version 2 of the License.
//
//      This program 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 this program; if not, write to the Free Software
//      Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
//      02111-1307, USA.

#ifndef __NET_LOWLEVEL_H
#define __NET_LOWLEVEL_H

//@{

/*----------------------------------------------------------------------------
--  Includes
----------------------------------------------------------------------------*/

#include <vector>

#ifndef _MSC_VER
#include <errno.h>
#include <time.h>
#endif

// Include system network headers
#if defined(__WIN32__) || defined(WIN32) || defined(_WIN32)

#define USE_WINSOCK

#include <winsock2.h>

#include <windows.h>
#include <winsock.h>
//#include <ws2tcpip.h>

// MS Knowledge base fix for SIO_GET_INTERFACE_LIST with NT4.0 ++
#define SIO_GET_INTERFACE_LIST 0x4004747F
#define IFF_UP 1
#define IFF_LOOPBACK 4
typedef struct _OLD_INTERFACE_INFO
{
  unsigned long iiFlags; /* Interface flags */
  SOCKADDR   iiAddress;  /* Interface address */
  SOCKADDR   iiBroadcastAddress; /* Broadcast address */
  SOCKADDR   iiNetmask;  /* Network mask */
} OLD_INTERFACE_INFO;
#define INTERFACE_INFO OLD_INTERFACE_INFO

#else // UNIX
#include <sys/time.h>
#include <unistd.h>
#include <netinet/in.h>
#include <netdb.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#ifndef __BEOS__
#include <net/if.h>
#include <arpa/inet.h>
#endif
#define INVALID_SOCKET -1
#endif // !WIN32

#ifndef INADDR_NONE
#define INADDR_NONE -1
#endif

/*----------------------------------------------------------------------------
--  Defines
----------------------------------------------------------------------------*/

#define NIPQUAD(ad) \
	(int)(((ad) >> 24) & 0xff), (int)(((ad) >> 16) & 0xff), \
	(int)(((ad) >> 8) & 0xff), (int)((ad) & 0xff)

#ifdef USE_WIN32
typedef SOCKET Socket;
#else
typedef int Socket;
#endif

/*----------------------------------------------------------------------------
--  Declarations
----------------------------------------------------------------------------*/

struct SocketSet {
	SocketSet() : MaxSockFD(0) {}

	void AddSocket(Socket socket);
	void DelSocket(Socket socket);

	std::vector<Socket> Sockets;
	std::vector<int> SocketReady;
	Socket MaxSockFD;
};

/*----------------------------------------------------------------------------
--  Variables
----------------------------------------------------------------------------*/

extern int NetLastSocket;              /// Last socket
extern unsigned long NetLastHost;      /// Last host number (net format)
extern int NetLastPort;                /// Last port number (net format)
extern unsigned long NetLocalAddrs[];  /// Local IP-Addrs of this host (net format)

/*----------------------------------------------------------------------------
--  Functions
----------------------------------------------------------------------------*/

	/// Hardware dependend network init.
extern int NetInit(void);
	/// Hardware dependend network exit.
extern void NetExit(void);
	/// Resolve host in name or or colon dot notation.
extern unsigned long NetResolveHost(const std::string &host);
	/// Get local IP from network file descriptor
extern int NetSocketAddr(const Socket sock);
	/// Open a UDP Socket port.
extern Socket NetOpenUDP(int port);
	/// Open a TCP Socket port.
extern Socket NetOpenTCP(int port);
	/// Close a UDP socket port.
extern void NetCloseUDP(Socket sockfd);
	/// Close a TCP socket port.
extern void NetCloseTCP(Socket sockfd);
	/// Set socket to non-blocking
extern int NetSetNonBlocking(Socket sockfd);
	/// Open a TCP connection.
extern int NetConnectTCP(Socket sockfd, unsigned long addr, int port);
	/// Send through a UPD socket to a host:port.
extern int NetSendUDP(Socket sockfd, unsigned long host, int port,
	const void *buf, int len);
	/// Send through a TCP socket
extern int NetSendTCP(Socket sockfd, const void *buf, int len);
	/// Wait for socket ready.
extern int NetSocketReady(Socket sockfd, int timeout);
	/// Wait for socket set ready.
extern int NetSocketSetReady(SocketSet *sockfd, int timeout);
	/// Check if a socket in a socket set is ready.
extern int NetSocketSetSocketReady(SocketSet *set, Socket socket);
	/// Receive from a UDP socket.
extern int NetRecvUDP(Socket sockfd, void *buf, int len);
	/// Receive from a TCP socket.
extern int NetRecvTCP(Socket sockfd, void *buf, int len);
	/// Listen for connections on a TCP socket
extern int NetListenTCP(Socket sockfd);
	/// Accept a connection on a TCP socket
extern Socket NetAcceptTCP(Socket sockfd);

	/// Add a socket to a socket set
extern void NetAddSocket(SocketSet *set, Socket socket);
	/// Delete a socket from a socket set
extern void NetDelSocket(SocketSet *set, Socket socket);

//@}

#endif // !__NET_LOWLEVEL_H