/*
Copyright (C) 1996-1997 Id Software, Inc.
Portions Copyright (C) 1999,2000  Nelson Rush.
Copyright (C) 1999,2000  contributors of the QuakeForge project
Please see the file "AUTHORS" for a list of contributors

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 2
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, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

*/
// cl_main.c  -- client main loop

#include <ctype.h>

#include "quakedef.h"
#include "winquake.h"
#include "pmove_simple.h"

#ifdef __sun
/* Sun's model_t in sys/model.h conflicts w/ Quake's model_t */
#define model_t sunmodel_t
#endif

#ifdef _WIN32
#include "winsock.h"
#else
#include <sys/types.h>
#include <netinet/in.h>
#endif

#ifdef __sun
#undef model_t
#endif

#ifndef INADDR_LOOPBACK
# define INADDR_LOOPBACK         (u_int32_t)0x7f000001
#endif

// we need to declare some mouse variables here, because the menu system
// references them even when on a unix system.

qboolean	noclip_anglehack;		// remnant from old quake


cvar_t	rcon_password = {"rcon_password", "", false};

cvar_t	rcon_address = {"rcon_address", ""};

cvar_t	cl_timeout = {"cl_timeout", "60"};

cvar_t	cl_shownet = {"cl_shownet","0"};	// can be 0, 1, or 2

cvar_t	cl_sbar		= {"cl_sbar", "0", true};
cvar_t	cl_hudswap	= {"cl_hudswap", "0", true};
cvar_t	cl_maxfps	= {"cl_maxfps", "0", true};

cvar_t	lookspring = {"lookspring","0", true};
cvar_t	lookstrafe = {"lookstrafe","0", true};
cvar_t	sensitivity = {"sensitivity","3", true};

cvar_t	m_pitch = {"m_pitch","0.022", true};
cvar_t	m_yaw = {"m_yaw","0.022"};
cvar_t	m_forward = {"m_forward","1"};
cvar_t	m_side = {"m_side","0.8"};

cvar_t	entlatency = {"entlatency", "20"};
cvar_t	cl_predict_players = {"cl_predict_players", "1"};
cvar_t	cl_predict_players2 = {"cl_predict_players2", "1"};
cvar_t	cl_solid_players = {"cl_solid_players", "1"};

cvar_t  localid = {"localid", ""};

static qboolean allowremotecmd = true;

//
// info mirrors
//
cvar_t	password = {"password", "", false, true};
cvar_t	spectator = {"spectator", "", false, true};
cvar_t	name = {"name","unnamed", true, true};
cvar_t	team = {"team","", true, true};
cvar_t	skin = {"skin","", true, true};
cvar_t	topcolor = {"topcolor","0", true, true};
cvar_t	bottomcolor = {"bottomcolor","0", true, true};
cvar_t	rate = {"rate","2500", true, true};
cvar_t	noaim = {"noaim","0", true, true};
cvar_t	msg = {"msg","1", true, true};

extern cvar_t cl_hightrack;


client_static_t	cls;
client_state_t	cl;

entity_state_t	cl_baselines[MAX_EDICTS];
efrag_t			cl_efrags[MAX_EFRAGS];
entity_t		cl_static_entities[MAX_STATIC_ENTITIES];
lightstyle_t	cl_lightstyle[MAX_LIGHTSTYLES];
dlight_t		cl_dlights[MAX_DLIGHTS];

// refresh list
// this is double buffered so the last frame
// can be scanned for oldorigins of trailing objects
int				cl_numvisedicts, cl_oldnumvisedicts;
entity_t		*cl_visedicts, *cl_oldvisedicts;
entity_t		cl_visedicts_list[2][MAX_VISEDICTS];

double			connect_time = -1;		// for connection retransmits

quakeparms_t host_parms;

qboolean	host_initialized;		// true if into command execution
qboolean	nomaster;

double		host_frametime;
double		realtime;				// without any filtering or bounding
double		oldrealtime;			// last frame run
int			host_framecount;

int			host_hunklevel;

byte		*host_basepal;
byte		*host_colormap;

netadr_t	master_adr;				// address of the master server

cvar_t	host_speeds = {"host_speeds","0"};			// set for running times
cvar_t	show_fps = {"show_fps","0"};			// set for running times
cvar_t	developer = {"developer","0"};

int			fps_count;

jmp_buf 	host_abort;

void Master_Connect_f (void);

char	*server_version = NULL;	// version of server we connected to

char emodel_name[] = 
	{ 'e' ^ 0xff, 'm' ^ 0xff, 'o' ^ 0xff, 'd' ^ 0xff, 'e' ^ 0xff, 'l' ^ 0xff, 0 };
char pmodel_name[] = 
	{ 'p' ^ 0xff, 'm' ^ 0xff, 'o' ^ 0xff, 'd' ^ 0xff, 'e' ^ 0xff, 'l' ^ 0xff, 0 };
char prespawn_name[] = 
	{ 'p'^0xff, 'r'^0xff, 'e'^0xff, 's'^0xff, 'p'^0xff, 'a'^0xff, 'w'^0xff, 'n'^0xff,
		' '^0xff, '%'^0xff, 'i'^0xff, ' '^0xff, '0'^0xff, ' '^0xff, '%'^0xff, 'i'^0xff, 0 };
char modellist_name[] = 
	{ 'm'^0xff, 'o'^0xff, 'd'^0xff, 'e'^0xff, 'l'^0xff, 'l'^0xff, 'i'^0xff, 's'^0xff, 't'^0xff, 
		' '^0xff, '%'^0xff, 'i'^0xff, ' '^0xff, '%'^0xff, 'i'^0xff, 0 };
char soundlist_name[] = 
	{ 's'^0xff, 'o'^0xff, 'u'^0xff, 'n'^0xff, 'd'^0xff, 'l'^0xff, 'i'^0xff, 's'^0xff, 't'^0xff, 
		' '^0xff, '%'^0xff, 'i'^0xff, ' '^0xff, '%'^0xff, 'i'^0xff, 0 };

/*
==================
CL_Quit_f
==================
*/
void CL_Quit_f (void)
{
	if (1 /* key_dest != key_console */ /* && cls.state != ca_dedicated */)
	{
		M_Menu_Quit_f ();
		return;
	}
	CL_Disconnect ();
	Sys_Quit ();
}

/*
=======================
CL_Version_f
======================
*/
void CL_Version_f (void)
{
	Con_Printf ("Version %s\n", QF_VERSION);
	Con_Printf ("Exe: "__TIME__" "__DATE__"\n");
}


/*
=======================
CL_SendConnectPacket

called by CL_Connect_f and CL_CheckResend
======================
*/
void CL_SendConnectPacket (void)
{
	netadr_t	adr;
	char	data[2048];
	double t1, t2;
// JACK: Fixed bug where DNS lookups would cause two connects real fast
//       Now, adds lookup time to the connect time.
//		 Should I add it to realtime instead?!?!

	if (cls.state != ca_disconnected)
		return;

	t1 = Sys_DoubleTime ();

	if (!NET_StringToAdr (cls.servername, &adr))
	{
		Con_Printf ("Bad server address\n");
		connect_time = -1;
		return;
	}

	if (!NET_IsClientLegal(&adr))
	{
		Con_Printf ("Illegal server address\n");
		connect_time = -1;
		return;
	}

	if (adr.port == 0)
		adr.port = BigShort (27500);
	t2 = Sys_DoubleTime ();

	connect_time = realtime+t2-t1;	// for retransmit requests

	cls.qport = Cvar_VariableValue("qport");

	// Arrgh, this was not in the old binary only release, and eats up
	// far too much of the 196 chars in the userinfo space, leaving nothing
	// for player use, thus, its commented out for the moment..
	//
	//Info_SetValueForStarKey (cls.userinfo, "*ip", NET_AdrToString(adr), MAX_INFO_STRING);

//	Con_Printf ("Connecting to %s...\n", cls.servername);
	snprintf(data, sizeof(data), "%c%c%c%cconnect %i %i %i \"%s\"\n",
		255, 255, 255, 255,	PROTOCOL_VERSION, cls.qport, cls.challenge, cls.userinfo);
	NET_SendPacket (strlen(data), data, adr);
}

/*
=================
CL_CheckForResend

Resend a connect message if the last one has timed out

=================
*/
void CL_CheckForResend (void)
{
	netadr_t	adr;
	char	data[2048];
	double t1, t2;

	if (connect_time == -1)
		return;
	if (cls.state != ca_disconnected)
		return;
	if (connect_time && realtime - connect_time < 5.0)
		return;

	t1 = Sys_DoubleTime ();
	if (!NET_StringToAdr (cls.servername, &adr))
	{
		Con_Printf ("Bad server address\n");
		connect_time = -1;
		return;
	}
	if (!NET_IsClientLegal(&adr))
	{
		Con_Printf ("Illegal server address\n");
		connect_time = -1;
		return;
	}

	if (adr.port == 0)
		adr.port = BigShort (27500);
	t2 = Sys_DoubleTime ();

	connect_time = realtime+t2-t1;	// for retransmit requests

	Con_Printf ("Connecting to %s...\n", cls.servername);
	snprintf(data, sizeof(data), "%c%c%c%cgetchallenge\n", 255, 255, 255, 255);
	NET_SendPacket (strlen(data), data, adr);
}

void CL_BeginServerConnect(void)
{
	connect_time = 0;
	CL_CheckForResend();
}

/*
================
CL_Connect_f

================
*/
void CL_Connect_f (void)
{
	char	*server;

	if (Cmd_Argc() != 2)
	{
		Con_Printf ("usage: connect <server>\n");
		return;	
	}
	
	server = Cmd_Argv (1);

	CL_Disconnect ();

	strncpy (cls.servername, server, sizeof(cls.servername)-1);
	CL_BeginServerConnect();
}


/*
=====================
CL_Rcon_f

  Send the rest of the command line over as
  an unconnected command.
=====================
*/
void CL_Rcon_f (void)
{
	char	message[1024];
	int		i;
	netadr_t	to;

	if (!rcon_password.string)
	{
		Con_Printf ("You must set 'rcon_password' before\n"
					"issuing an rcon command.\n");
		return;
	}

	message[0] = 255;
	message[1] = 255;
	message[2] = 255;
	message[3] = 255;
	message[4] = 0;

	strcat (message, "rcon ");

	strcat (message, rcon_password.string);
	strcat (message, " ");

	for (i=1 ; i<Cmd_Argc() ; i++)
	{
		strcat (message, Cmd_Argv(i));
		strcat (message, " ");
	}

	if (cls.state >= ca_connected)
		to = cls.netchan.remote_address;
	else
	{
		if (!strlen(rcon_address.string))
		{
			Con_Printf ("You must either be connected,\n"
						"or set the 'rcon_address' cvar\n"
						"to issue rcon commands\n");

			return;
		}
		NET_StringToAdr (rcon_address.string, &to);
	}
	
	NET_SendPacket (strlen(message)+1, message
		, to);
}


/*
=====================
CL_ClearState

=====================
*/
void CL_ClearState (void)
{
	int			i;

	S_StopAllSounds (true);

	Con_DPrintf ("Clearing memory\n");
	D_FlushCaches ();
	Mod_ClearAll ();
	if (host_hunklevel)	// FIXME: check this...
		Hunk_FreeToLowMark (host_hunklevel);

	CL_ClearTEnts ();

// wipe the entire cl structure
	memset (&cl, 0, sizeof(cl));

	SZ_Clear (&cls.netchan.message);

// clear other arrays	
	memset (cl_efrags, 0, sizeof(cl_efrags));
	memset (cl_dlights, 0, sizeof(cl_dlights));
	memset (cl_lightstyle, 0, sizeof(cl_lightstyle));

//
// allocate the efrags and chain together into a free list
//
	cl.free_efrags = cl_efrags;
	for (i=0 ; i<MAX_EFRAGS-1 ; i++)
		cl.free_efrags[i].entnext = &cl.free_efrags[i+1];
	cl.free_efrags[i].entnext = NULL;
}

/*
=====================
CL_Disconnect

Sends a disconnect message to the server
This is also called on Host_Error, so it shouldn't cause any errors
=====================
*/
void CL_Disconnect (void)
{
	byte	final[10];

	connect_time = -1;

#ifdef _WIN32
	SetWindowText (mainwindow, "QuakeWorld: disconnected");
#endif

// stop sounds (especially looping!)
	S_StopAllSounds (true);
	
// if running a local server, shut it down
	if (cls.demoplayback)
		CL_StopPlayback ();
	else if (cls.state != ca_disconnected)
	{
		if (cls.demorecording)
			CL_Stop_f ();

		final[0] = clc_stringcmd;
		strcpy (final+1, "drop");
		Netchan_Transmit (&cls.netchan, 6, final);
		Netchan_Transmit (&cls.netchan, 6, final);
		Netchan_Transmit (&cls.netchan, 6, final);

		cls.state = ca_disconnected;

		cls.demoplayback = cls.demorecording = cls.timedemo = false;
	}
	Cam_Reset();

	if (cls.download) {
		fclose(cls.download);
		cls.download = NULL;
	}

	CL_StopUpload();

}

void CL_Disconnect_f (void)
{
	CL_Disconnect ();
}

/*
====================
CL_User_f

user <name or userid>

Dump userdata / masterdata for a user
====================
*/
void CL_User_f (void)
{
	int		uid;
	int		i;

	if (Cmd_Argc() != 2)
	{
		Con_Printf ("Usage: user <username / userid>\n");
		return;
	}

	uid = atoi(Cmd_Argv(1));

	for (i=0 ; i<MAX_CLIENTS ; i++)
	{
		if (!cl.players[i].name[0])
			continue;
		if (cl.players[i].userid == uid
		|| !strcmp(cl.players[i].name, Cmd_Argv(1)) )
		{
			Info_Print (cl.players[i].userinfo);
			return;
		}
	}
	Con_Printf ("User not in server.\n");
}

/*
====================
CL_Users_f

Dump userids for all current players
====================
*/
void CL_Users_f (void)
{
	int		i;
	int		c;

	c = 0;
	Con_Printf ("userid frags name\n");
	Con_Printf ("------ ----- ----\n");
	for (i=0 ; i<MAX_CLIENTS ; i++)
	{
		if (cl.players[i].name[0])
		{
			Con_Printf ("%6i %4i %s\n", cl.players[i].userid, cl.players[i].frags, cl.players[i].name);
			c++;
		}
	}

	Con_Printf ("%i total users\n", c);
}

void CL_Color_f (void)
{
	// just for quake compatability...
	int		top, bottom;
	char	num[16];

	if (Cmd_Argc() == 1)
	{
		Con_Printf ("\"color\" is \"%s %s\"\n",
			Info_ValueForKey (cls.userinfo, "topcolor"),
			Info_ValueForKey (cls.userinfo, "bottomcolor") );
		Con_Printf ("color <0-13> [0-13]\n");
		return;
	}

	if (Cmd_Argc() == 2)
		top = bottom = atoi(Cmd_Argv(1));
	else
	{
		top = atoi(Cmd_Argv(1));
		bottom = atoi(Cmd_Argv(2));
	}
	
	top &= 15;
	if (top > 13)
		top = 13;
	bottom &= 15;
	if (bottom > 13)
		bottom = 13;
	
	snprintf(num, sizeof(num), "%i", top);
	Cvar_Set ("topcolor", num);
	snprintf(num, sizeof(num), "%i", bottom);
	Cvar_Set ("bottomcolor", num);
}

/*
==================
CL_FullServerinfo_f

Sent by server when serverinfo changes
==================
*/
void CL_FullServerinfo_f (void)
{
	char *p;

	if (Cmd_Argc() != 2)
	{
		Con_Printf ("usage: fullserverinfo <complete info string>\n");
		return;
	}

	strcpy (cl.serverinfo, Cmd_Argv(1));

	if ((p = Info_ValueForKey(cl.serverinfo, "*qf_version")) && *p) {
		if (!server_version)
			Con_Printf("QuakeForge Version %s Server\n", p);
		server_version = strdup(p);
	} else if ((p = Info_ValueForKey(cl.serverinfo, "*version")) && *p) {
		if (!server_version)
			Con_Printf("Version %s Server\n", p);
		server_version = strdup(p);
	}
}

/*
==================
CL_FullInfo_f

Allow clients to change userinfo
==================
Casey was here :)
*/
void CL_FullInfo_f (void)
{
	char	key[512];
	char	value[512];
	char	*o;
	char	*s;

	if (Cmd_Argc() != 2)
	{
		Con_Printf ("fullinfo <complete info string>\n");
		return;
	}

	s = Cmd_Argv(1);
	if (*s == '\\')
		s++;
	while (*s)
	{
		o = key;
		while (*s && *s != '\\')
			*o++ = *s++;
		*o = 0;

		if (!*s)
		{
			Con_Printf ("MISSING VALUE\n");
			return;
		}

		o = value;
		s++;
		while (*s && *s != '\\')
			*o++ = *s++;
		*o = 0;

		if (*s)
			s++;

		if (!stricmp(key, pmodel_name) || !stricmp(key, emodel_name))
			continue;

		Info_SetValueForKey (cls.userinfo, key, value, MAX_INFO_STRING);
	}
}

/*
==================
CL_SetInfo_f

Allow clients to change userinfo
==================
*/
void CL_SetInfo_f (void)
{
	if (Cmd_Argc() == 1)
	{
		Info_Print (cls.userinfo);
		return;
	}
	if (Cmd_Argc() != 3)
	{
		Con_Printf ("usage: setinfo [ <key> <value> ]\n");
		return;
	}
	if (!stricmp(Cmd_Argv(1), pmodel_name) || !strcmp(Cmd_Argv(1), emodel_name))
		return;

	Info_SetValueForKey (cls.userinfo, Cmd_Argv(1), Cmd_Argv(2), MAX_INFO_STRING);
	if (cls.state >= ca_connected)
		Cmd_ForwardToServer ();
}

/*
====================
CL_Packet_f

packet <destination> <contents>

Contents allows \n escape character
====================
*/
void CL_Packet_f (void)
{
	char	send[2048];
	int		i, l;
	char	*in, *out;
	netadr_t	adr;

	if (Cmd_Argc() != 3)
	{
		Con_Printf ("packet <destination> <contents>\n");
		return;
	}

	if (!NET_StringToAdr (Cmd_Argv(1), &adr))
	{
		Con_Printf ("Bad address\n");
		return;
	}

	in = Cmd_Argv(2);
	out = send+4;
	send[0] = send[1] = send[2] = send[3] = 0xff;

	l = strlen (in);
	for (i=0 ; i<l ; i++)
	{
		if (in[i] == '\\' && in[i+1] == 'n')
		{
			*out++ = '\n';
			i++;
		}
		else
			*out++ = in[i];
	}
	*out = 0;

	NET_SendPacket (out-send, send, adr);
}


/*
=====================
CL_NextDemo

Called to play the next demo in the demo loop
=====================
*/
void CL_NextDemo (void)
{
	char	str[1024];

	if (cls.demonum == -1)
		return;		// don't play demos

	if (!cls.demos[cls.demonum][0] || cls.demonum == MAX_DEMOS)
	{
		cls.demonum = 0;
		if (!cls.demos[cls.demonum][0])
		{
//			Con_Printf ("No demos listed with startdemos\n");
			cls.demonum = -1;
			return;
		}
	}

	snprintf(str, sizeof(str),"playdemo %s\n", cls.demos[cls.demonum]);
	Cbuf_InsertText (str);
	cls.demonum++;
}


/*
=================
CL_Changing_f

Just sent as a hint to the client that they should
drop to full console
=================
*/
void CL_Changing_f (void)
{
	if (cls.download)  // don't change when downloading
		return;

	S_StopAllSounds (true);
	cl.intermission = 0;
	cls.state = ca_connected;	// not active anymore, but not disconnected
	Con_Printf ("\nChanging map...\n");
}


/*
=================
CL_Reconnect_f

The server is changing levels
=================
*/
void CL_Reconnect_f (void)
{
	if (cls.download)  // don't change when downloading
		return;

	S_StopAllSounds (true);

	if (cls.state == ca_connected) {
		Con_Printf ("reconnecting...\n");
		MSG_WriteChar (&cls.netchan.message, clc_stringcmd);
		MSG_WriteString (&cls.netchan.message, "new");
		return;
	}

	if (!*cls.servername) {
		Con_Printf("No server to reconnect to...\n");
		return;
	}

	CL_Disconnect();
	CL_BeginServerConnect();
}

/*
=================
CL_ConnectionlessPacket

Responses to broadcasts, etc
=================
*/
void CL_ConnectionlessPacket (void)
{
	char	*s;
	int		c;

    MSG_BeginReading ();
    MSG_ReadLong ();        // skip the -1

	c = MSG_ReadByte ();
	if (!cls.demoplayback)
		Con_Printf ("%s: ", NET_AdrToString (net_from));
//	Con_DPrintf ("%s", net_message.data + 5);
	if (c == S2C_CONNECTION)
	{
		Con_Printf ("connection\n");
		if (cls.state >= ca_connected)
		{
			if (!cls.demoplayback)
				Con_Printf ("Dup connect received.  Ignored.\n");
			return;
		}
		Netchan_Setup (&cls.netchan, net_from, cls.qport);
		MSG_WriteChar (&cls.netchan.message, clc_stringcmd);
		MSG_WriteString (&cls.netchan.message, "new");	
		cls.state = ca_connected;
		Con_Printf ("Connected.\n");
		allowremotecmd = false; // localid required now for remote cmds
		return;
	}
	// remote command from gui front end
	if (c == A2C_CLIENT_COMMAND)
	{
		char	cmdtext[2048];

		Con_Printf ("client command\n");

		if ((*(unsigned *)net_from.ip != *(unsigned *)net_local_adr.ip
			&& *(unsigned *)net_from.ip != htonl(INADDR_LOOPBACK)) )
		{
			Con_Printf ("Command packet from remote host.  Ignored.\n");
			return;
		}
#ifdef _WIN32
		ShowWindow (mainwindow, SW_RESTORE);
		SetForegroundWindow (mainwindow);
#endif
		s = MSG_ReadString ();

		strncpy(cmdtext, s, sizeof(cmdtext) - 1);
		cmdtext[sizeof(cmdtext) - 1] = 0;

		s = MSG_ReadString ();

		while (*s && isspace(*s))
			s++;
		while (*s && isspace(s[strlen(s) - 1]))
			s[strlen(s) - 1] = 0;

		if (!allowremotecmd && (!*localid.string || strcmp(localid.string, s))) {
			if (!*localid.string) {
				Con_Printf("===========================\n");
				Con_Printf("Command packet received from local host, but no "
					"localid has been set.  You may need to upgrade your server "
					"browser.\n");
				Con_Printf("===========================\n");
				return;
			}
			Con_Printf("===========================\n");
			Con_Printf("Invalid localid on command packet received from local host. "
				"\n|%s| != |%s|\n"
				"You may need to reload your server browser and QuakeWorld.\n",
				s, localid.string);
			Con_Printf("===========================\n");
			Cvar_Set("localid", "");
			return;
		}

		Cbuf_AddText (cmdtext);
		allowremotecmd = false;
		return;
	}
	// print command from somewhere
	if (c == A2C_PRINT)
	{
		Con_Printf ("print\n");

		s = MSG_ReadString ();
		Con_Print (s);
		return;
	}

	// ping from somewhere
	if (c == A2A_PING)
	{
		char	data[6];

		Con_Printf ("ping\n");

		data[0] = 0xff;
		data[1] = 0xff;
		data[2] = 0xff;
		data[3] = 0xff;
		data[4] = A2A_ACK;
		data[5] = 0;
		
		NET_SendPacket (6, data, net_from);
		return;
	}

	if (c == S2C_CHALLENGE) {
		Con_Printf ("challenge\n");

		s = MSG_ReadString ();
		cls.challenge = atoi(s);
		CL_SendConnectPacket ();
		return;
	}

#if 0
	if (c == svc_disconnect) {
		Con_Printf ("disconnect\n");

		Host_EndGame ("Server disconnected");
		return;
	}
#endif

	Con_Printf ("unknown:  %c\n", c);
}


/*
=================
CL_ReadPackets
=================
*/
void CL_ReadPackets (void)
{
//	while (NET_GetPacket ())
	while (CL_GetMessage())
	{
		//
		// remote command packet
		//
		if (*(int *)net_message.data == -1)
		{
			CL_ConnectionlessPacket ();
			continue;
		}

		if (net_message.cursize < 8)
		{
			Con_Printf ("%s: Runt packet\n",NET_AdrToString(net_from));
			continue;
		}

		//
		// packet from server
		//
		if (!cls.demoplayback && 
			!NET_CompareAdr (net_from, cls.netchan.remote_address))
		{
			Con_DPrintf ("%s:sequenced packet without connection\n"
				,NET_AdrToString(net_from));
			continue;
		}
		if (!Netchan_Process(&cls.netchan))
			continue;		// wasn't accepted for some reason
		CL_ParseServerMessage ();

//		if (cls.demoplayback && cls.state >= ca_active && !CL_DemoBehind())
//			return;
	}

	//
	// check timeout
	//
	if (cls.state >= ca_connected
	 && realtime - cls.netchan.last_received > cl_timeout.value)
	{
		Con_Printf ("\nServer connection timed out.\n");
		CL_Disconnect ();
		return;
	}
	
}

//=============================================================================

/*
=====================
CL_Download_f
=====================
*/
void CL_Download_f (void)
{
	char *p, *q;

	if (cls.state == ca_disconnected)
	{
		Con_Printf ("Must be connected.\n");
		return;
	}

	if (Cmd_Argc() != 2)
	{
		Con_Printf ("Usage: download <datafile>\n");
		return;
	}

	snprintf(cls.downloadname, sizeof(cls.downloadname), "%s/%s", com_gamedir, Cmd_Argv(1));

	p = cls.downloadname;
	for (;;) {
		if ((q = strchr(p, '/')) != NULL) {
			*q = 0;
			Sys_mkdir(cls.downloadname);
			*q = '/';
			p = q + 1;
		} else
			break;
	}

	strcpy(cls.downloadtempname, cls.downloadname);
	cls.download = fopen (cls.downloadname, "wb");
	cls.downloadtype = dl_single;

	MSG_WriteByte (&cls.netchan.message, clc_stringcmd);
	SZ_Print (&cls.netchan.message, va("download %s\n",Cmd_Argv(1)));
}

#ifdef _WIN32
#include <windows.h>
/*
=================
CL_Minimize_f
=================
*/
void CL_Windows_f (void) {
//	if (modestate == MS_WINDOWED)
//		ShowWindow(mainwindow, SW_MINIMIZE);
//	else
		SendMessage(mainwindow, WM_SYSKEYUP, VK_TAB, 1 | (0x0F << 16) | (1<<29));
}
#endif

/*
=================
CL_Init
=================
*/
void CL_Init (void)
{
	extern	cvar_t		baseskin;
	extern	cvar_t		noskins;

	cls.state = ca_disconnected;

	Info_SetValueForKey (cls.userinfo, "name", "unnamed", MAX_INFO_STRING);
	Info_SetValueForKey (cls.userinfo, "topcolor", "0", MAX_INFO_STRING);
	Info_SetValueForKey (cls.userinfo, "bottomcolor", "0", MAX_INFO_STRING);
	Info_SetValueForKey (cls.userinfo, "rate", "2500", MAX_INFO_STRING);
	Info_SetValueForKey (cls.userinfo, "msg", "1", MAX_INFO_STRING);
	Info_SetValueForStarKey(cls.userinfo, "*qf_ver", QF_VERSION, MAX_INFO_STRING);
	Info_SetValueForStarKey(cls.userinfo, "*ver", VERSION, MAX_INFO_STRING);

	CL_InitInput ();
	CL_InitTEnts ();
	CL_InitPrediction ();
	CL_InitCam ();
	Pmove_Init ();
	
//
// register our commands
//
	Cvar_RegisterVariable (&show_fps);
	Cvar_RegisterVariable (&host_speeds);
	Cvar_RegisterVariable (&developer);

	Cvar_RegisterVariable (&cl_warncmd);
	Cvar_RegisterVariable (&cl_upspeed);
	Cvar_RegisterVariable (&cl_forwardspeed);
	Cvar_RegisterVariable (&cl_backspeed);
	Cvar_RegisterVariable (&cl_sidespeed);
	Cvar_RegisterVariable (&cl_movespeedkey);
	Cvar_RegisterVariable (&cl_yawspeed);
	Cvar_RegisterVariable (&cl_pitchspeed);
	Cvar_RegisterVariable (&cl_anglespeedkey);
	Cvar_RegisterVariable (&cl_shownet);
	Cvar_RegisterVariable (&cl_sbar);
	Cvar_RegisterVariable (&cl_hudswap);
	Cvar_RegisterVariable (&cl_maxfps);
	Cvar_RegisterVariable (&cl_timeout);
	Cvar_RegisterVariable (&lookspring);
	Cvar_RegisterVariable (&lookstrafe);
	Cvar_RegisterVariable (&sensitivity);

	Cvar_RegisterVariable (&m_pitch);
	Cvar_RegisterVariable (&m_yaw);
	Cvar_RegisterVariable (&m_forward);
	Cvar_RegisterVariable (&m_side);

	Cvar_RegisterVariable (&rcon_password);
	Cvar_RegisterVariable (&rcon_address);

	Cvar_RegisterVariable (&entlatency);
	Cvar_RegisterVariable (&cl_predict_players2);
	Cvar_RegisterVariable (&cl_predict_players);
	Cvar_RegisterVariable (&cl_solid_players);

	Cvar_RegisterVariable (&localid);

	Cvar_RegisterVariable (&baseskin);
	Cvar_RegisterVariable (&noskins);

	//
	// info mirrors
	//
	Cvar_RegisterVariable (&name);
	Cvar_RegisterVariable (&password);
	Cvar_RegisterVariable (&spectator);
	Cvar_RegisterVariable (&skin);
	Cvar_RegisterVariable (&team);
	Cvar_RegisterVariable (&topcolor);
	Cvar_RegisterVariable (&bottomcolor);
	Cvar_RegisterVariable (&rate);
	Cvar_RegisterVariable (&msg);
	Cvar_RegisterVariable (&noaim);


	Cmd_AddCommand ("version", CL_Version_f);

	Cmd_AddCommand ("changing", CL_Changing_f);
	Cmd_AddCommand ("disconnect", CL_Disconnect_f);
	Cmd_AddCommand ("record", CL_Record_f);
	Cmd_AddCommand ("rerecord", CL_ReRecord_f);
	Cmd_AddCommand ("stop", CL_Stop_f);
	Cmd_AddCommand ("playdemo", CL_PlayDemo_f);
	Cmd_AddCommand ("timedemo", CL_TimeDemo_f);

	Cmd_AddCommand ("skins", Skin_Skins_f);
	Cmd_AddCommand ("allskins", Skin_AllSkins_f);

	Cmd_AddCommand ("quit", CL_Quit_f);

	Cmd_AddCommand ("connect", CL_Connect_f);
	Cmd_AddCommand ("reconnect", CL_Reconnect_f);

	Cmd_AddCommand ("rcon", CL_Rcon_f);
	Cmd_AddCommand ("packet", CL_Packet_f);
	Cmd_AddCommand ("user", CL_User_f);
	Cmd_AddCommand ("users", CL_Users_f);

	Cmd_AddCommand ("setinfo", CL_SetInfo_f);
	Cmd_AddCommand ("fullinfo", CL_FullInfo_f);
	Cmd_AddCommand ("fullserverinfo", CL_FullServerinfo_f);

	Cmd_AddCommand ("color", CL_Color_f);
	Cmd_AddCommand ("download", CL_Download_f);

	Cmd_AddCommand ("nextul", CL_NextUpload);
	Cmd_AddCommand ("stopul", CL_StopUpload);

//
// forward to server commands
//
	Cmd_AddCommand ("kill", NULL);
	Cmd_AddCommand ("pause", NULL);
	Cmd_AddCommand ("say", NULL);
	Cmd_AddCommand ("say_team", NULL);
	Cmd_AddCommand ("serverinfo", NULL);

//
//  Windows commands
//
#ifdef _WIN32
	Cmd_AddCommand ("windows", CL_Windows_f);
#endif
}


/*
================
Host_EndGame

Call this to drop to a console without exiting the qwcl
================
*/
void Host_EndGame (char *message, ...)
{
	va_list		argptr;
	char		string[1024];
	
	va_start (argptr, message);
	vsnprintf (string, sizeof(string), message, argptr);
	va_end (argptr);
	Con_Printf ("\n===========================\n");
	Con_Printf ("Host_EndGame: %s\n",string);
	Con_Printf ("===========================\n\n");
	
	CL_Disconnect ();

	longjmp (host_abort, 1);
}

/*
================
Host_Error

This shuts down the client and exits qwcl
================
*/
void Host_Error (char *error, ...)
{
	va_list		argptr;
	char		string[1024];
	static	qboolean inerror = false;
	
	if (inerror)
		Sys_Error ("Host_Error: recursively entered");
	inerror = true;
	
	va_start (argptr, error);
	vsnprintf (string, sizeof(string), error, argptr);
	va_end (argptr);
	Con_Printf ("Host_Error: %s\n",string);
	
	CL_Disconnect ();
	cls.demonum = -1;

	inerror = false;

// FIXME
	Sys_Error ("Host_Error: %s\n",string);
}


/*
===============
Host_WriteConfiguration

Writes key bindings and archived cvars to config.cfg
===============
*/
void Host_WriteConfiguration (void)
{
	FILE	*f;

	if (host_initialized)
	{
		f = fopen (va("%s/config.cfg",com_gamedir), "w");
		if (!f)
		{
			Con_Printf ("Couldn't write config.cfg.\n");
			return;
		}
		
		Key_WriteBindings (f);
		Cvar_WriteVariables (f);

		fclose (f);
	}
}


//============================================================================

#if 0
/*
==================
Host_SimulationTime

This determines if enough time has passed to run a simulation frame
==================
*/
qboolean Host_SimulationTime(float time)
{
	float fps;

	if (oldrealtime > realtime)
		oldrealtime = 0;

	if (cl_maxfps.value)
		fps = max(30.0, min(cl_maxfps.value, 72.0));
	else
		fps = max(30.0, min(rate.value/80.0, 72.0));

	if (!cls.timedemo && (realtime + time) - oldrealtime < 1.0/fps)
		return false;			// framerate is too high
	return true;
}
#endif


/*
==================
Host_Frame

Runs all active servers
==================
*/
int		nopacketcount;
void Host_Frame (float time)
{
	static double		time1 = 0;
	static double		time2 = 0;
	static double		time3 = 0;
	int			pass1, pass2, pass3;
	float fps;
	if (setjmp (host_abort) )
		return;			// something bad happened, or the server disconnected

	// decide the simulation time
	realtime += time;
	if (oldrealtime > realtime)
		oldrealtime = 0;

	if (cl_maxfps.value)
		fps = max(30.0, min(cl_maxfps.value, 72.0));
	else
		fps = max(30.0, min(rate.value/80.0, 72.0));

	if (!cls.timedemo && realtime - oldrealtime < 1.0/fps)
		return;			// framerate is too high

	host_frametime = realtime - oldrealtime;
	oldrealtime = realtime;
	if (host_frametime > 0.2)
		host_frametime = 0.2;
		
	// get new key events
	Sys_SendKeyEvents ();

	// allow mice or other external controllers to add commands
	IN_Commands ();

	// process console commands
	Cbuf_Execute ();

	// fetch results from server
	CL_ReadPackets ();

	// send intentions now
	// resend a connection request if necessary
	if (cls.state == ca_disconnected) {
		CL_CheckForResend ();
	} else
		CL_SendCmd ();

	// Set up prediction for other players
	CL_SetUpPlayerPrediction(false);

	// do client side motion prediction
	CL_PredictMove ();

	// Set up prediction for other players
	CL_SetUpPlayerPrediction(true);

	// build a refresh entity list
	CL_EmitEntities ();

	// update video
	if (host_speeds.value)
		time1 = Sys_DoubleTime ();

	SCR_UpdateScreen ();

	if (host_speeds.value)
		time2 = Sys_DoubleTime ();
		
	// update audio
	if (cls.state == ca_active)
	{
		S_Update (r_origin, vpn, vright, vup);
		CL_DecayLights ();
	}
	else
		S_Update (vec3_origin, vec3_origin, vec3_origin, vec3_origin);
	
	CDAudio_Update();

	if (host_speeds.value)
	{
		pass1 = (time1 - time3)*1000;
		time3 = Sys_DoubleTime ();
		pass2 = (time2 - time1)*1000;
		pass3 = (time3 - time2)*1000;
		Con_Printf ("%3i tot %3i server %3i gfx %3i snd\n",
					pass1+pass2+pass3, pass1, pass2, pass3);
	}

	host_framecount++;
	fps_count++;
}

static void simple_crypt(char *buf, int len)
{
	while (len--)
		*buf++ ^= 0xff;
}

void Host_FixupModelNames(void)
{
	simple_crypt(emodel_name, sizeof(emodel_name) - 1);
	simple_crypt(pmodel_name, sizeof(pmodel_name) - 1);
	simple_crypt(prespawn_name,  sizeof(prespawn_name)  - 1);
	simple_crypt(modellist_name, sizeof(modellist_name) - 1);
	simple_crypt(soundlist_name, sizeof(soundlist_name) - 1);
}

//============================================================================

/*
====================
Host_Init
====================
*/
void Host_Init (quakeparms_t *parms)
{
	COM_InitArgv (parms->argc, parms->argv);
	COM_AddParm ("-game");
	COM_AddParm ("qw");

	Sys_mkdir("qw");

	if (COM_CheckParm ("-minmemory"))
		parms->memsize = MINIMUM_MEMORY;

	host_parms = *parms;

	if (parms->memsize < MINIMUM_MEMORY)
		Sys_Error ("Only %4.1f megs of memory reported, can't execute game", parms->memsize / (float)0x100000);

	Memory_Init (parms->membase, parms->memsize);
	Cbuf_Init ();
	Cmd_Init ();
	V_Init ();

	COM_Init ();

	Host_FixupModelNames();
	
	NET_Init (PORT_CLIENT);
	Netchan_Init ();

	W_LoadWadFile ("gfx.wad");
	Key_Init ();
	Con_Init ();	
	M_Init ();	
	Mod_Init ();
	
//	Con_Printf ("Exe: "__TIME__" "__DATE__"\n");
	Con_Printf ("%4.1f megs RAM used.\n",parms->memsize/ (1024*1024.0));
	
	R_InitTextures ();
 
	host_basepal = (byte *)COM_LoadHunkFile ("gfx/palette.lmp");
	if (!host_basepal)
		Sys_Error ("Couldn't load gfx/palette.lmp");
	host_colormap = (byte *)COM_LoadHunkFile ("gfx/colormap.lmp");
	if (!host_colormap)
		Sys_Error ("Couldn't load gfx/colormap.lmp");

	VID_Init(host_basepal);
	IN_Init();
	Draw_Init();
	SCR_Init();
	R_Init();

//	S_Init ();		// S_Init is now done as part of VID. Sigh.
	
	cls.state = ca_disconnected;
	CDAudio_Init();
	Sbar_Init();
	CL_Init();

	Cbuf_InsertText ("exec quake.rc\n");
	Cbuf_AddText ("echo Type connect <internet address> or use GameSpy to connect to a game.\n");
	Cbuf_AddText ("cl_warncmd 1\n");

	Hunk_AllocName (0, "-HOST_HUNKLEVEL-");
	host_hunklevel = Hunk_LowMark ();

	host_initialized = true;

	Con_Printf ("\nClient Version %s\n\n", QF_VERSION);

	Con_Printf ("������� QuakeWorld Initialized �������\n");	
}


/*
===============
Host_Shutdown

FIXME: this is a callback from Sys_Quit and Sys_Error.  It would be better
to run quit through here before the final handoff to the sys code.
===============
*/
void Host_Shutdown(void)
{
	static qboolean isdown = false;
	
	if (isdown)
	{
		printf ("recursive shutdown\n");
		return;
	}
	isdown = true;

	Host_WriteConfiguration (); 
		
	CDAudio_Shutdown ();
	NET_Shutdown ();
	S_Shutdown();
	IN_Shutdown ();
	if (host_basepal)
		VID_Shutdown();
}