Renegade/Code/wwnet/netutil.h

/*
**	Command & Conquer Renegade(tm)
**	Copyright 2025 Electronic Arts Inc.
**
**	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, either version 3 of the License, or
**	(at your option) any later version.
**
**	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, see <http://www.gnu.org/licenses/>.
*/

//
// Filename:     netutil.h
// Project:      wwnet
// Author:       Tom Spencer-Smith
// Date:         June 1998
// Description:
//
//-----------------------------------------------------------------------------
#if defined(_MSV_VER)
#pragma once
#endif

#ifndef NETUTIL_H
#define NETUTIL_H

#include "win.h"
#include <winsock.h>

#include "bittype.h"

class cPacket;

#define WOULD_BLOCK(exp)				cNetUtil::Would_Block(__FILE__, __LINE__, exp)
#define SEND_RESOURCE_FAILURE(exp)	cNetUtil::Send_Resource_Failure(__FILE__, __LINE__, exp)
#define WSA_ERROR							{cNetUtil::Wsa_Error(__FILE__, __LINE__);}
#define WSA_CHECK(exp)					{if ((exp) == SOCKET_ERROR) {cNetUtil::Wsa_Error(__FILE__, __LINE__);}}

typedef void (*LanPacketHandlerCallback)(cPacket & packet);

enum {
	MIN_SERVER_PORT = 1024,		//1025,
	MAX_SERVER_PORT = 65535		//5000
};

class cNetUtil
{
	public:
      static void		Wsa_Init();
      static bool		Protocol_Init(bool is_internet);
		static bool		Get_Local_Address(LPSOCKADDR_IN p_local_address);
		static void		Wsa_Error(LPCSTR sFile, unsigned uLine);
		static bool		Is_Same_Address(LPSOCKADDR_IN p_address1, const SOCKADDR_IN* p_address2);
		static bool		Would_Block(LPCSTR sFile, unsigned uLine, int ret_code);
		static bool		Send_Resource_Failure(LPCSTR sFile, unsigned uLine, int ret_code);
		static void		Address_To_String(LPSOCKADDR_IN p_address, char * str, UINT len,
								USHORT & port);
		static LPCSTR	Address_To_String(ULONG ip_address);
		static void		String_To_Address(LPSOCKADDR_IN p_address, LPCSTR str, USHORT port);
      static void		Create_Unbound_Socket(SOCKET & sock);
      static bool		Create_Bound_Socket(SOCKET & sock, USHORT port, SOCKADDR_IN & local_address);
      static void		Close_Socket(SOCKET & sock);
      static void		Create_Broadcast_Address(LPSOCKADDR_IN p_broadcast_address, USHORT port);
      static void		Create_Local_Address(LPSOCKADDR_IN p_local_address, USHORT port);
      static void		Broadcast(SOCKET & sock, USHORT port, cPacket & packet);
      static bool		Is_Tcpip_Present();
      static void		Lan_Servicing(SOCKET & sock, LanPacketHandlerCallback p_callback);
		static bool		Is_Internet() {return IsInternet;}
		static void		Set_Socket_Buffer_Sizes(SOCKET sock, int new_size = 10000);
      static UINT		Get_Default_Resend_Timeout_Ms() {return DefaultResendTimeoutMs;}

		static const	USHORT NETSTATS_SAMPLE_TIME_MS;
		static const	USHORT KEEPALIVE_TIMEOUT_MS;
		static const	USHORT MAX_RESENDS;
		static const	USHORT MULTI_SENDS;
		static const	USHORT RESEND_TIMEOUT_LAN_MS;
		static const	USHORT RESEND_TIMEOUT_INTERNET_MS;
		static const	ULONG	 CLIENT_CONNECTION_LOSS_TIMEOUT;
		static const	ULONG	 SERVER_CONNECTION_LOSS_TIMEOUT;
		static const	ULONG	 SERVER_CONNECTION_LOSS_TIMEOUT_LOADING_ALLOWANCE;

		static const char *Winsock_Error_Text(int error_code);

   private:
		static int		Get_Local_Tcpip_Addresses(SOCKADDR_IN ip_address[], USHORT max_addresses);

		static bool		IsInternet;
      static UINT		DefaultResendTimeoutMs;
		static char		WorkingAddressBuffer[300];
};

#endif // NETUTIL_H




      //static USHORT Get_Header_Bytes() {return HeaderBytes;}
      //static USHORT Get_Max_Packet_App_Data_Size() {return MaxPacketAppDataSize;}

      //static USHORT HeaderBytes;
      //static USHORT MaxPacketAppDataSize;

	   //static const WORD WS_VERSION_REQD;


		//static int Get_Net_Stats_Sample_Time_Ms()					{return NETSTATS_SAMPLE_TIME_MS;}
		//static int Get_Default_Multi_Sends()						{return DefaultMultiSends;}
		//static int Get_Default_Max_Resends()						{return DefaultMaxResends;}
		//static int Get_Default_Keepalive_Timeout_Ms()			{return DefaultKeepaliveTimeoutMs;}
		//static int Get_Desired_Send_Buffer_Size_Bytes()			{return DesiredSendBufferSizeBytes;}
		//static int Get_Desired_Receive_Buffer_Size_Bytes()		{return DesiredReceiveBufferSizeBytes;}
		//static int Get_Default_Server_Port()						{return DefaultServerPort;}
		//static int Get_Max_Receive_Time_Ms()						{return MaxReceiveTimeMs;}

		//static float Get_Priority_Tolerance_Downwards()			{return PriorityToleranceDownwards;}
		//static float Get_Priority_Tolerance_Upwards()			{return PriorityToleranceUpwards;}
		//static float Get_Max_TP_Correction_Downwards()			{return MaxTPCorrectionDownwards;}
		//static float Get_Max_TP_Correction_Upwards()				{return MaxTPCorrectionUpwards;}
		//static float Get_Priority_Noise_Factor()					{return PriorityNoiseFactor;}
		//static float Get_Initial_Threshold_Priority()			{return InitialThresholdPriority;}
		//static float Get_Priority_Growth_Per_Second()			{return PriorityGrowthPerSecond;}

		//static float Compute_Priority_Noise();

		//static int DefaultMultiSends; // Number of sends in a SEND_MULTI
		//static int DefaultMaxResends; // If you exceed this then the connection is regarded as broken
		//static int DefaultKeepaliveTimeoutMs;
		//static int DesiredSendBufferSizeBytes;
		//static int DesiredReceiveBufferSizeBytes;
		//static int DefaultServerPort;
		//static int MaxReceiveTimeMs;

		//static float PriorityToleranceDownwards;
		//static float PriorityToleranceUpwards;
		//static float MaxTPCorrectionDownwards;
		//static float MaxTPCorrectionUpwards;
		//static float PriorityNoiseFactor;
		//static float InitialThresholdPriority;
		//static float PriorityGrowthPerSecond;
		//static int		Get_Default_Resend_Timeout_Lan_Ms()			{return RESEND_TIMEOUT_LAN_MS;}
		//static int		Get_Default_Resend_Timeout_Internet_Ms()	{return RESEND_TIMEOUT_INTERNET_MS;}
		//static void		Onetime_Init();