Xash3DArchive/engine/client/cl_main.c

/*
Copyright (C) 1997-2001 Id Software, 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 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 "common.h"
#include "client.h"

cvar_t	*rcon_client_password;
cvar_t	*rcon_address;

cvar_t	*cl_footsteps;
cvar_t	*cl_timeout;
cvar_t	*cl_predict;
cvar_t	*cl_showfps;
cvar_t	*cl_gun;

cvar_t	*cl_add_particles;
cvar_t	*cl_add_lights;
cvar_t	*cl_add_entities;
cvar_t	*cl_add_blend;
cvar_t	*cl_maxpackets;
cvar_t	*cl_shownet;
cvar_t	*cl_showmiss;
cvar_t	*cl_showclamp;
cvar_t	*cl_mouselook;
cvar_t	*cl_paused;

cvar_t	*lookspring;
cvar_t	*lookstrafe;

cvar_t	*m_pitch;
cvar_t	*m_yaw;
cvar_t	*m_forward;
cvar_t	*m_side;

cvar_t	*cl_lightlevel;

//
// userinfo
//
cvar_t	*info_password;
cvar_t	*info_spectator;
cvar_t	*name;
cvar_t	*skin;
cvar_t	*rate;
cvar_t	*fov;
cvar_t	*hand;

cvar_t	*cl_vwep;

client_static_t	cls;
client_t		cl;

entity_state_t	cl_parse_entities[MAX_PARSE_ENTITIES];

extern	cvar_t *allow_download;
//======================================================================

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

/*
===================
Cmd_ForwardToServer

adds the current command line as a clc_stringcmd to the client message.
things like godmode, noclip, etc, are commands directed to the server,
so when they are typed in at the console, they will need to be forwarded.
===================
*/
void Cmd_ForwardToServer (void)
{
	char	*cmd;

	if( cls.demoplayback ) return; // not really connected

	cmd = Cmd_Argv(0);
	if (cls.state <= ca_connected || *cmd == '-' || *cmd == '+')
	{
		Msg ("Unknown command \"%s\"\n", cmd);
		return;
	}

	MSG_WriteByte (&cls.netchan.message, clc_stringcmd);
	SZ_Print (&cls.netchan.message, cmd);
	if (Cmd_Argc() > 1)
	{
		SZ_Print (&cls.netchan.message, " ");
		SZ_Print (&cls.netchan.message, Cmd_Args());
		Msg("clc_stringcmd: %s\n", Cmd_Args());
	}
}

/*
==================
CL_ForwardToServer_f
==================
*/
void CL_ForwardToServer_f (void)
{
	if( cls.demoplayback ) return; // not really connected
	if (cls.state != ca_connected && cls.state != ca_active)
	{
		Msg("Can't \"%s\", not connected\n", Cmd_Argv(0));
		return;
	}
	
	// don't forward the first argument
	if (Cmd_Argc() > 1)
	{
		MSG_WriteByte( &cls.netchan.message, clc_stringcmd );
		SZ_Print( &cls.netchan.message, Cmd_Args());
	}
}


/*
==================
CL_Pause_f
==================
*/
void CL_Pause_f (void)
{
	if(!Host_ServerState() && !cls.demoplayback )
		return; // but allow pause in demos

	// never pause in multiplayer
	if( Cvar_VariableValue ("maxclients") > 1 )
	{
		Cvar_SetValue ("paused", 0);
		return;
	}

	Cvar_SetValue( "paused", !cl_paused->value );
}

/*
==================
CL_Quit_f
==================
*/
void CL_Quit_f (void)
{
	CL_Disconnect();
	Sys_Quit();
}

/*
================
CL_Drop

Called after an Host_Error was thrown
================
*/
void CL_Drop (void)
{
	if (cls.state == ca_uninitialized) return;
	if (cls.state == ca_disconnected) return;

	CL_Disconnect();
}

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

We have gotten a challenge from the server, so try and
connect.
======================
*/
void CL_SendConnectPacket( void )
{
	netadr_t	adr;
	int		port;

	if(!NET_StringToAdr (cls.servername, &adr))
	{
		MsgDev( D_INFO, "CL_SendConnectPacket: bad server address\n");
		cls.connect_time = 0;
		return;
	}
	if(adr.port == 0) adr.port = BigShort( PORT_SERVER );
	port = Cvar_VariableValue( "net_qport" );

	userinfo_modified = false;
	Netchan_OutOfBandPrint(NS_CLIENT, adr, "connect %i %i %i \"%s\"\n", PROTOCOL_VERSION, port, cls.challenge, Cvar_Userinfo());
}

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

Resend a connect message if the last one has timed out
=================
*/
void CL_CheckForResend (void)
{
	netadr_t	adr;

	// if the local server is running and we aren't
	// then connect
	if (cls.state == ca_disconnected && Host_ServerState())
	{
		cls.state = ca_connecting;
		com.strncpy (cls.servername, "localhost", sizeof(cls.servername)-1);
		// we don't need a challenge on the localhost
		CL_SendConnectPacket ();
		return;
	}

	// resend if we haven't gotten a reply yet
	if(cls.demoplayback || cls.state != ca_connecting)
		return;
	if(cls.realtime - cls.connect_time < 3000) return;

	if(!NET_StringToAdr (cls.servername, &adr))
	{
		MsgDev(D_INFO, "CL_CheckForResend: bad server address\n");
		cls.state = ca_disconnected;
		return;
	}
	if (adr.port == 0) adr.port = BigShort (PORT_SERVER);
	cls.connect_time = cls.realtime; // for retransmit requests
	Msg ("Connecting to %s...\n", cls.servername);
	Netchan_OutOfBandPrint( NS_CLIENT, adr, "getchallenge\n" );
}


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

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

	if (Cmd_Argc() != 2)
	{
		Msg ("usage: connect <server>\n");
		return;	
	}
	
	if(Host_ServerState())
	{	
		// if running a local server, kill it and reissue
		com.strncpy( host.finalmsg, "Server quit\n", MAX_STRING );
		SV_Shutdown( false );
	}
	else CL_Disconnect();

	server = Cmd_Argv (1);

	CL_Disconnect();

	cls.state = ca_connecting;
	com.strncpy( cls.servername, server, sizeof(cls.servername) - 1);
	cls.connect_time = MAX_HEARTBEAT; // CL_CheckForResend() will fire immediately
}


/*
=====================
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_client_password->string)
	{
		Msg ("You must set 'rcon_password' before\n"
					"issuing an rcon command.\n");
		return;
	}

	message[0] = (char)255;
	message[1] = (char)255;
	message[2] = (char)255;
	message[3] = (char)255;
	message[4] = 0;

	strcat (message, "rcon ");

	strcat (message, rcon_client_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))
		{
			Msg ("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);
		if (to.port == 0)
			to.port = BigShort (PORT_SERVER);
	}
	
	NET_SendPacket( NS_CLIENT, strlen(message)+1, message, to);
}


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

=====================
*/
void CL_ClearState (void)
{
	S_StopAllSounds ();
	CL_ClearEffects ();
	CL_FreeEdicts();

	// wipe the entire cl structure
	memset (&cl, 0, sizeof(cl));
	SZ_Clear (&cls.netchan.message);
}

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

Goes from a connected state to full screen console state
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[32];

	if (cls.state == ca_disconnected)
		return;

	VectorClear (cl.refdef.blend);
	UI_HideMenu();

	cls.connect_time = 0;

	SCR_StopCinematic();

	CL_Stop_f();

	// send a disconnect message to the server
	final[0] = clc_stringcmd;
	com.strcpy((char *)final + 1, "disconnect");
	Netchan_Transmit(&cls.netchan, strlen(final), final);
	Netchan_Transmit(&cls.netchan, strlen(final), final);
	Netchan_Transmit(&cls.netchan, strlen(final), final);

	CL_ClearState ();

	// stop download
	if (cls.download)
	{
		FS_Close(cls.download);
		cls.download = NULL;
	}

	cls.state = ca_disconnected;
}

/*
===================
CL_DisconnectPacket

Sometimes the server can drop the client and the netchan based
disconnect can be lost.  If the client continues to send packets
to the server, the server will send out of band disconnect packets
to the client so it doesn't have to wait for the full timeout period.
===================
*/
void CL_DisconnectPacket( netadr_t from )
{
	if( cls.state == ca_disconnected )
		return;

	// if not from our server, ignore it
	if(!NET_CompareAdr( from, cls.netchan.remote_address ))
		return;

	// if we have received packets within three seconds, ignore it
	// (it might be a malicious spoof)
	if( cls.realtime - cls.netchan.last_received < 3000 )
		return;

	// drop the connection
	MsgDev( D_ERROR, "Server disconnected for unknown reason\n" );
	CL_Disconnect();
}

void CL_Disconnect_f (void)
{
	Host_Error("Disconnected from server\n");
}


/*
====================
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)
	{
		Msg ("packet <destination> <contents>\n");
		return;
	}

	if (!NET_StringToAdr (Cmd_Argv(1), &adr))
	{
		Msg ("Bad address\n");
		return;
	}
	if (!adr.port)
		adr.port = BigShort (PORT_SERVER);

	in = Cmd_Argv(2);
	out = send+4;
	send[0] = send[1] = send[2] = send[3] = (char)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( NS_CLIENT, out-send, send, adr);
}

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

Just sent as a hint to the client that they should
drop to full console
=================
*/
void CL_Changing_f (void)
{
	//ZOID
	//if we are downloading, we don't change!  This so we don't suddenly stop downloading a map
	if (cls.download) return;

	S_StopAllSounds();
	cls.state = ca_connected;	// not active anymore, but not disconnected
	Msg("\nChanging map...\n");
}


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

The server is changing levels
=================
*/
void CL_Reconnect_f (void)
{
	//ZOID
	//if we are downloading, we don't change!  This so we don't suddenly stop downloading a map
	if (cls.download) return;

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

	if (*cls.servername)
	{
		if (cls.state >= ca_connected)
		{
			CL_Disconnect();
			cls.connect_time = cls.realtime - 1500;
		}
		else cls.connect_time = MAX_HEARTBEAT; // fire immediately

		cls.state = ca_connecting;
		Msg ("reconnecting...\n");
	}
}

/*
===================
CL_StatusLocal_f
===================
*/
void CL_GetServerList_f( void )
{
	netadr_t	adr;

	// send a broadcast packet
	MsgDev( D_INFO, "status pinging broadcast...\n" );
	cls.pingtime = cls.realtime;

	adr.type = NA_BROADCAST;
	adr.port = BigShort( PORT_SERVER );
	Netchan_OutOfBandPrint( NS_CLIENT, adr, "status" );
}

/*
=============
CL_FreeServerInfo
=============
*/
static void CL_FreeServerInfo( serverinfo_t *server )
{
	if( server->mapname ) Mem_Free( server->mapname );
	if( server->hostname ) Mem_Free( server->hostname );
	if( server->shortname ) Mem_Free( server->shortname );
	if( server->gamename ) Mem_Free( server->gamename );
	if( server->netaddress ) Mem_Free( server->netaddress );
	if( server->playerstr ) Mem_Free( server->playerstr );
	if( server->pingstring ) Mem_Free( server->pingstring);
	memset( server, 0, sizeof(serverinfo_t));
}

/*
=============
CL_FreeServerList
=============
*/
static void CL_FreeServerList_f( void )
{
	int		i;

	for( i = 0; i < cls.numservers; i++ )
		CL_FreeServerInfo( &cls.serverlist[i] );
	cls.numservers = 0;
}

/*
=============
CL_DupeCheckServerList

Checks for duplicates and returns true if there is one...
Since status has higher priority than info, if there is already an instance and
it's not status, and the current one is status, the old one is removed.
=============
*/
static bool CL_DupeCheckServerList( char *adr, bool status )
{
	int	i;

	for( i = 0; i < cls.numservers; i++ )
	{
		if(!cls.serverlist[i].netaddress && !cls.serverlist[i].hostname )
		{
			CL_FreeServerInfo( &cls.serverlist[i] );
			continue;
		}
		if( cls.serverlist[i].netaddress && !com.strcmp( cls.serverlist[i].netaddress, adr ))
		{
			if( cls.serverlist[i].statusPacket && status )
			{
				return true;
			}
			else if( status )
			{
				CL_FreeServerInfo( &cls.serverlist[i] );
				return false;
			}
		}
	}
	return false;
}

/*
=============
CL_ParseServerStatus

Parses a status packet from a server
FIXME: check against a list of sent status requests so it's not attempting to parse things it shouldn't
=============
*/
bool CL_ParseServerStatus( char *adr, char *info )
{
	serverinfo_t	*server;
	char		*token;
	char		shortName[32];

	if( !info || !info[0] )return false;
	if( !adr || !adr[0] ) return false;
	if( !com.strchr( info, '\\')) return false;

	if( cls.numservers >= MAX_SERVERS )
		return true;
	if( CL_DupeCheckServerList( adr, true ))
		return true;

	server = &cls.serverlist[cls.numservers];
	CL_FreeServerInfo( server );
	cls.numservers++;

	// add net address
	server->netaddress = copystring( adr );
	server->mapname = copystring(Info_ValueForKey( info, "mapname"));
	server->maxplayers = com.atoi(Info_ValueForKey( info, "maxclients"));
	server->gamename = copystring(Info_ValueForKey( info, "gamename"));
	server->hostname = copystring(Info_ValueForKey( info, "hostname"));
	if( server->hostname )
	{
		com.strncpy( shortName, server->hostname, sizeof(shortName));
		server->shortname = copystring( shortName );
	}

	// Check the player count
	server->numplayers = com.atoi(Info_ValueForKey( info, "curplayers"));
	if( server->numplayers <= 0 )
	{
		server->numplayers = 0;

		token = strtok( info, "\n" );
		if( token )
		{
			token = strtok( NULL, "\n" );
			while( token )
			{
				server->numplayers++;
				token = strtok( NULL, "\n" );
			}
		}
	}

	// check if it's valid
	if( !server->mapname[0] && !server->maxplayers && !server->gamename[0] && !server->hostname[0] )
	{
		CL_FreeServerInfo( server );
		return false;
	}

	server->playerstr = copystring( va("%i/%i", server->numplayers, server->maxplayers ));

	// add the ping
	server->ping = cls.realtime - cls.pingtime;
	server->pingstring = copystring( va("%ims", server->ping ));
	server->statusPacket = true;

	// print information
	MsgDev( D_NOTE, "%s %s ", server->hostname, server->mapname );
	MsgDev( D_NOTE, "%i/%i %ims\n", server->numplayers, server->maxplayers, server->ping );

	return true;
}

/*
=================
CL_ParseStatusMessage

Handle a reply from a ping
=================
*/
void CL_ParseStatusMessage( netadr_t from, sizebuf_t *msg )
{
	char	*s;

	s = MSG_ReadString( msg );

	Msg ("%s\n", s);
	CL_ParseServerStatus( NET_AdrToString(from), s );
}

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

Responses to broadcasts, etc
=================
*/
void CL_ConnectionlessPacket( netadr_t from, sizebuf_t *msg )
{
	char	*s, *c;
	
	MSG_BeginReading( msg );
	MSG_ReadLong( msg ); // skip the -1

	s = MSG_ReadStringLine( msg );

	Cmd_TokenizeString( s );
	c = Cmd_Argv(0);

	MsgDev(D_INFO, "%s: %s\n", NET_AdrToString (from), c);

	// server connection
	if(!com.strcmp( c, "client_connect"))
	{
		if (cls.state == ca_connected)
		{
			Msg ("Dup connect received.  Ignored.\n");
			return;
		}
		Netchan_Setup( NS_CLIENT, &cls.netchan, from, Cvar_VariableValue( "net_qport" ));
		MSG_WriteChar( &cls.netchan.message, clc_stringcmd );
		MSG_WriteString( &cls.netchan.message, "new" );	
		cls.state = ca_connected;
		return;
	}

	// server responding to a status broadcast
	if(!com.strcmp( c, "info"))
	{
		CL_ParseStatusMessage( from, msg );
		return;
	}

	// remote command from gui front end
	if(!strcmp(c, "cmd"))
	{
		if(!NET_IsLocalAddress(from))
		{
			Msg ("Command packet from remote host.  Ignored.\n");
			return;
		}
		ShowWindow( host.hWnd, SW_RESTORE);
		SetForegroundWindow ( host.hWnd );
		s = MSG_ReadString( msg );
		Cbuf_AddText(s);
		Cbuf_AddText("\n");
		return;
	}
	// print command from somewhere
	if (!strcmp(c, "print"))
	{
		// print command from somewhere
		s = MSG_ReadString( msg );
		if(!CL_ParseServerStatus( NET_AdrToString( from ), s ))
			Msg( s );
		return;
	}

	// ping from somewhere
	if (!strcmp(c, "ping"))
	{
		Netchan_OutOfBandPrint( NS_CLIENT, from, "ack" );
		return;
	}

	// challenge from the server we are connecting to
	if (!strcmp(c, "challenge"))
	{
		cls.challenge = com.atoi(Cmd_Argv(1));
		CL_SendConnectPacket ();
		return;
	}

	// echo request from server
	if (!strcmp(c, "echo"))
	{
		Netchan_OutOfBandPrint( NS_CLIENT, from, "%s", Cmd_Argv(1) );
		return;
	}

	// a disconnect message from the server, which will happen if the server
	// dropped the connection but it is still getting packets from us
	if(!com.strcmp( c, "disconnect" ))
	{
		CL_DisconnectPacket( from );
		return;
	}
	Msg ("Unknown command.\n");
}

//=============================================================================
/*
==============
CL_Userinfo_f
==============
*/
void CL_Userinfo_f (void)
{
	Msg ("User info settings:\n");
	Info_Print (Cvar_Userinfo());
}

int precache_check; // for autodownload of precache items
int precache_spawncount;
int precache_tex;
int precache_model_skin;

byte *precache_model; // used for skin checking in alias models

#define PLAYER_MULT 5

// ENV_CNT is map load, ENV_CNT+1 is first env map
#define ENV_CNT (CS_PLAYERSKINS + MAX_CLIENTS * PLAYER_MULT)
#define TEXTURE_CNT (ENV_CNT+13)

static const char *env_suf[6] = {"rt", "bk", "lf", "ft", "up", "dn"};

void CL_RequestNextDownload (void)
{
	uint		map_checksum;	// for detecting cheater maps
	char		fn[MAX_OSPATH];
	studiohdr_t	*pheader;

	if(cls.state != ca_connected)
		return;

	if (!allow_download->value && precache_check < ENV_CNT)
		precache_check = ENV_CNT;

	if( precache_check == CS_MODELS )
	{
		// confirm map
		precache_check = CS_MODELS+2; // 0 isn't used
		if(!CL_CheckOrDownloadFile(cl.configstrings[CS_MODELS+1]))
			return; // started a download
	}
	if (precache_check >= CS_MODELS && precache_check < CS_MODELS+MAX_MODELS)
	{
		while (precache_check < CS_MODELS+MAX_MODELS && cl.configstrings[precache_check][0])
		{
			if (cl.configstrings[precache_check][0] == '*' || cl.configstrings[precache_check][0] == '#')
			{
				precache_check++;
				continue;
			}
			if (precache_model_skin == 0)
			{
				if (!CL_CheckOrDownloadFile(cl.configstrings[precache_check]))
				{
					precache_model_skin = 1;
					return; // started a download
				}
				precache_model_skin = 1;
			}

			// checking for skins in the model
			if (!precache_model)
			{
                              	precache_model = FS_LoadFile (cl.configstrings[precache_check], NULL);
				if (!precache_model)
				{
					precache_model_skin = 0;
					precache_check++;
					continue; // couldn't load it
				}
				if (LittleLong(*(uint *)precache_model) != IDSTUDIOHEADER)
				{
					// not an studio model
					precache_model = 0;
					precache_model_skin = 0;
					precache_check++;
					continue;
				}
				pheader = (studiohdr_t *)precache_model;
				if (LittleLong (pheader->version) != STUDIO_VERSION)
				{
					precache_check++;
					precache_model_skin = 0;
					continue; // couldn't load it
				}
			}

			pheader = (studiohdr_t *)precache_model;

			if (precache_model)
			{ 
				precache_model = 0;
			}
			precache_model_skin = 0;
			precache_check++;
		}
		precache_check = CS_SOUNDS;
	}
	if (precache_check >= CS_SOUNDS && precache_check < CS_SOUNDS+MAX_SOUNDS)
	{ 
		if (precache_check == CS_SOUNDS) precache_check++; // zero is blank
		while (precache_check < CS_SOUNDS+MAX_SOUNDS && cl.configstrings[precache_check][0])
		{
			if (cl.configstrings[precache_check][0] == '*')
			{
				precache_check++;
				continue;
			}
			com.sprintf(fn, "sound/%s", cl.configstrings[precache_check++]);
			if (!CL_CheckOrDownloadFile(fn)) return; // started a download
		}
		precache_check = CS_IMAGES;
	}
	if (precache_check >= CS_IMAGES && precache_check < CS_IMAGES+MAX_IMAGES)
	{
		if (precache_check == CS_IMAGES) precache_check++; // zero is blank
		while (precache_check < CS_IMAGES+MAX_IMAGES && cl.configstrings[precache_check][0])
		{
			com.sprintf(fn, "pics/%s.pcx", cl.configstrings[precache_check++]);
			if (!CL_CheckOrDownloadFile(fn)) return; // started a download
		}
		precache_check = CS_PLAYERSKINS;
	}
	// skins are special, since a player has three things to download:
	// model, weapon model and skin
	// so precache_check is now *3
	if (precache_check >= CS_PLAYERSKINS && precache_check < CS_PLAYERSKINS + MAX_CLIENTS * PLAYER_MULT)
	{
		while (precache_check < CS_PLAYERSKINS + MAX_CLIENTS * PLAYER_MULT)
		{
			int i, n;
			char model[MAX_QPATH], skin[MAX_QPATH], *p;

			i = (precache_check - CS_PLAYERSKINS)/PLAYER_MULT;
			n = (precache_check - CS_PLAYERSKINS)%PLAYER_MULT;

			if (!cl.configstrings[CS_PLAYERSKINS+i][0])
			{
				precache_check = CS_PLAYERSKINS + (i + 1) * PLAYER_MULT;
				continue;
			}

			if ((p = strchr(cl.configstrings[CS_PLAYERSKINS+i], '\\')) != NULL)
				p++;
			else p = cl.configstrings[CS_PLAYERSKINS+i];
				strcpy(model, p);
				p = strchr(model, '/');
			if (!p)
				p = strchr(model, '\\');
			if (p)
			{
				*p++ = 0;
				strcpy(skin, p);
			}
			else *skin = 0;

			switch (n)
			{
			case 0: // model
				com.sprintf(fn, "models/players/%s/player.mdl", model);
				if (!CL_CheckOrDownloadFile(fn))
				{
					precache_check = CS_PLAYERSKINS + i * PLAYER_MULT + 1;
					return; // started a download
				}
				n++;
				/*FALL THROUGH*/

			case 1: // weapon model
				com.sprintf(fn, "weapons/%s.mdl", model);
				if (!CL_CheckOrDownloadFile(fn))
				{
					precache_check = CS_PLAYERSKINS + i * PLAYER_MULT + 2;
					return; // started a download
				}
				n++;
				/*FALL THROUGH*/
			default:
				break;
			}
		}
		// precache phase completed
		precache_check = ENV_CNT;
	}

	if (precache_check == ENV_CNT)
	{
		precache_check = ENV_CNT + 1;

		pe->BeginRegistration( cl.configstrings[CS_MODELS+1], true, &map_checksum );
		if( map_checksum != com.atoi(cl.configstrings[CS_MAPCHECKSUM]))
		{
			Host_Error("Local map version differs from server: %i != '%s'\n", map_checksum, cl.configstrings[CS_MAPCHECKSUM]);
			return;
		}
	}

	if (precache_check > ENV_CNT && precache_check < TEXTURE_CNT)
	{
		if( allow_download->value )
		{
			while (precache_check < TEXTURE_CNT)
			{
				int n = precache_check++ - ENV_CNT - 1;

				if (n & 1) com.sprintf(fn, "gfx/env/%s.dds", cl.configstrings[CS_SKY] ); // cubemap pack
				else com.sprintf(fn, "gfx/env/%s%s.tga", cl.configstrings[CS_SKY], env_suf[n/2]);
				if (!CL_CheckOrDownloadFile(fn)) return; // started a download
			}
		}
		precache_check = TEXTURE_CNT;
	}

	if (precache_check == TEXTURE_CNT)
	{
		precache_check = TEXTURE_CNT+1;
		precache_tex = 0;
	}

	// confirm existance of textures, download any that don't exist
	if (precache_check == TEXTURE_CNT+1)
	{
		if (allow_download->value )
		{
			while( precache_tex < pe->NumTextures())
			{
				char fn[MAX_OSPATH];

				com.sprintf(fn, "textures/%s.tga", pe->GetTextureName( precache_tex++ ));
				if(!CL_CheckOrDownloadFile(fn)) return; // started a download
			}
		}
		precache_check = TEXTURE_CNT+999;
	}

	CL_RegisterSounds();
	CL_PrepRefresh();

	if( cls.demoplayback ) return; // not really connected
	MSG_WriteByte( &cls.netchan.message, clc_stringcmd );
	MSG_WriteString( &cls.netchan.message, va("begin %i\n", precache_spawncount));
}

/*
=================
CL_Precache_f

The server will send this command right
before allowing the client into the server
=================
*/
void CL_Precache_f (void)
{
	precache_check = CS_MODELS;
	precache_spawncount = com.atoi(Cmd_Argv(1));
	precache_model = 0;
	precache_model_skin = 0;

	CL_RequestNextDownload();
}


/*
=================
CL_InitLocal
=================
*/
void CL_InitLocal (void)
{
	cls.state = ca_disconnected;
	cls.realtime = Sys_Milliseconds();
	CL_InitInput();

	// register our variables
	cl_add_blend = Cvar_Get ("cl_blend", "1", 0, "disables client blends" );
	cl_add_lights = Cvar_Get ("cl_lights", "1", 0, "disables dynamic lights" );
	cl_add_particles = Cvar_Get ("cl_particles", "1", 0, "disables particles engine" );
	cl_add_entities = Cvar_Get ("cl_entities", "1", 0, "disables client entities" );
	cl_gun = Cvar_Get ("cl_gun", "1", 0, "hide firstperson viewmodel" );
	cl_footsteps = Cvar_Get ("cl_footsteps", "1", 0, "disables player footsteps" );
	cl_predict = Cvar_Get ("cl_predict", "1", CVAR_ARCHIVE, "disables client movement prediction" );
//	cl_minfps = Cvar_Get ("cl_minfps", "5", 0);

	cl_upspeed = Cvar_Get ("cl_upspeed", "200", 0, "client upspeed limit" );
	cl_forwardspeed = Cvar_Get ("cl_forwardspeed", "200", 0, "client forward speed limit" );
	cl_sidespeed = Cvar_Get ("cl_sidespeed", "200", 0, "client side-speed limit" );
	cl_yawspeed = Cvar_Get ("cl_yawspeed", "140", 0, "client yaw speed" );
	cl_pitchspeed = Cvar_Get ("cl_pitchspeed", "150", 0, "client pitch speed" );
	cl_anglespeedkey = Cvar_Get ("cl_anglespeedkey", "1.5", 0, "client anglespeed" );
	cl_maxpackets = Cvar_Get( "cl_maxpackets", "30", CVAR_ARCHIVE, "number of usercmd packets" );

	cl_run = Cvar_Get ("cl_run", "0", CVAR_ARCHIVE, "keep client for always run mode" );
	cl_mouselook = Cvar_Get( "cl_mouselook", "1", CVAR_ARCHIVE, "enables mouse look" );
	lookspring = Cvar_Get ("lookspring", "0", CVAR_ARCHIVE, "allow look spring" );
	lookstrafe = Cvar_Get ("lookstrafe", "0", CVAR_ARCHIVE, "allow look strafe" );

	m_pitch = Cvar_Get ("m_pitch", "0.022", CVAR_ARCHIVE, "mouse pitch value" );
	m_yaw = Cvar_Get ("m_yaw", "0.022", 0, "mouse yaw value" );
	m_forward = Cvar_Get ("m_forward", "1", 0, "mouse forward speed" );
	m_side = Cvar_Get ("m_side", "1", 0, "mouse side speed" );

	cl_shownet = Cvar_Get ("cl_shownet", "0", 0, "client show network packets" );
	cl_showmiss = Cvar_Get ("cl_showmiss", "0", 0, "client show network errors" );
	cl_showclamp = Cvar_Get ("showclamp", "0", 0, "show client clamping" );
	cl_timeout = Cvar_Get ("cl_timeout", "120", 0, "connect timeout (in-seconds)" );

	rcon_client_password = Cvar_Get ("rcon_password", "", 0, "remote control client password" );
	rcon_address = Cvar_Get ("rcon_address", "", 0, "remote control address" );

	cl_lightlevel = Cvar_Get ("r_lightlevel", "0", 0, "no description" );

	//
	// userinfo
	//
	info_password = Cvar_Get ("password", "", CVAR_USERINFO, "player password" );
	info_spectator = Cvar_Get ("spectator", "0", CVAR_USERINFO, "spectator mode" );
	name = Cvar_Get ("name", "unnamed", CVAR_USERINFO | CVAR_ARCHIVE, "player name" );
	skin = Cvar_Get ("skin", "male/grunt", CVAR_USERINFO | CVAR_ARCHIVE, "playerskin" );
	rate = Cvar_Get ("rate", "25000", CVAR_USERINFO | CVAR_ARCHIVE, "player network rate" );	// FIXME
	hand = Cvar_Get ("hand", "0", CVAR_USERINFO | CVAR_ARCHIVE, "viewmodel handedness" );
	fov = Cvar_Get ("fov", "90", CVAR_USERINFO | CVAR_ARCHIVE, "client fov" );
	cl_vwep = Cvar_Get ("cl_vwep", "1", CVAR_ARCHIVE, "no description" );
	cl_showfps = Cvar_Get ("cl_showfps", "1", CVAR_ARCHIVE, "show client fps" );

	// register our commands
	Cmd_AddCommand ("cmd", CL_ForwardToServer_f, "send a console commandline to the server" );
	Cmd_AddCommand ("pause", CL_Pause_f, "pause the game (if the server allows pausing)" );
	Cmd_AddCommand ("getserverlist", CL_GetServerList_f, "get info about local servers" );
	Cmd_AddCommand ("freeserverlist", CL_FreeServerList_f, "clear info about local servers" );

	Cmd_AddCommand ("userinfo", CL_Userinfo_f, "print current client userinfo" );
	Cmd_AddCommand ("changing", CL_Changing_f, "sent by server to tell client to wait for level change" );
	Cmd_AddCommand ("disconnect", CL_Disconnect_f, "disconnect from server" );
	Cmd_AddCommand ("record", CL_Record_f, "record a demo" );
	Cmd_AddCommand ("playdemo", CL_PlayDemo_f, "playing a demo" );
	Cmd_AddCommand ("stop", CL_Stop_f, "stop playing or recording a demo" );

	Cmd_AddCommand ("quit", CL_Quit_f, "quit from game" );
	Cmd_AddCommand ("exit", CL_Quit_f, "quit from game" );

	Cmd_AddCommand ("screenshot", CL_ScreenShot_f, "takes a screenshot of the next rendered frame" );
	Cmd_AddCommand ("levelshot", CL_LevelShot_f, "same as \"screenshot\", used for create plaque images" );

	Cmd_AddCommand ("connect", CL_Connect_f, "connect to a server by hostname" );
	Cmd_AddCommand ("reconnect", CL_Reconnect_f, "reconnect to current level" );

	Cmd_AddCommand ("rcon", CL_Rcon_f, "sends a command to the server console (rcon_password and rcon_address required)" );

	// this is dangerous to leave in
// 	Cmd_AddCommand ("packet", CL_Packet_f, "send a packet with custom contents" );

	Cmd_AddCommand ("precache", CL_Precache_f, "precache specified resource (by index)" );
	Cmd_AddCommand ("download", CL_Download_f, "download specified resource (by name)" );

	//
	// forward to server commands
	//
	// the only thing this does is allow command completion
	// to work -- all unknown commands are automatically
	// forwarded to the server
	Cmd_AddCommand ("wave", NULL, NULL );
	Cmd_AddCommand ("inven", NULL, NULL );
	Cmd_AddCommand ("kill", NULL, NULL );
	Cmd_AddCommand ("use", NULL, NULL );
	Cmd_AddCommand ("drop", NULL, NULL );
	Cmd_AddCommand ("say", NULL, NULL );
	Cmd_AddCommand ("say_team", NULL, NULL );
	Cmd_AddCommand ("info", NULL, NULL );
	Cmd_AddCommand ("prog", NULL, NULL );
	Cmd_AddCommand ("give", NULL, NULL );
	Cmd_AddCommand ("god", NULL, NULL );
	Cmd_AddCommand ("notarget", NULL, NULL );
	Cmd_AddCommand ("noclip", NULL, NULL );
	Cmd_AddCommand ("invuse", NULL, NULL );
	Cmd_AddCommand ("invprev", NULL, NULL );
	Cmd_AddCommand ("invnext", NULL, NULL );
	Cmd_AddCommand ("invdrop", NULL, NULL );
	Cmd_AddCommand ("weapnext", NULL, NULL );
	Cmd_AddCommand ("weapprev", NULL, NULL );
}



/*
===============
CL_WriteConfiguration

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

	if (cls.state == ca_uninitialized) return;

	f = FS_Open("scripts/config/keys.rc", "w");
	if(f)
	{
		FS_Printf (f, "//=======================================================================\n");
		FS_Printf (f, "//\t\t\tCopyright XashXT Group 2007 <20>\n");
		FS_Printf (f, "//\t\t\tkeys.rc - current key bindings\n");
		FS_Printf (f, "//=======================================================================\n");
		Key_WriteBindings(f);
		FS_Close (f);
	}
	else MsgDev( D_ERROR, "Couldn't write keys.rc.\n");

	f = FS_Open("scripts/config/vars.rc", "w");
	if(f)
	{
		FS_Printf (f, "//=======================================================================\n");
		FS_Printf (f, "//\t\t\tCopyright XashXT Group 2007 <20>\n");
		FS_Printf (f, "//\t\t\tvars.rc - archive of cvars\n");
		FS_Printf (f, "//=======================================================================\n");
		Cmd_WriteVariables(f);
		FS_Close (f);	
	}
	else MsgDev( D_ERROR, "Couldn't write vars.rc.\n");
}

//============================================================================
void CL_ReadNetMessage( void )
{
	sizebuf_t		net_message;
	sizebuf_t		*msg = &net_message;
	byte		buffer[MAX_MSGLEN];
	netadr_t		net_from;

	SZ_Init( msg, buffer, sizeof(buffer));

	while( NET_GetPacket(NS_CLIENT, &net_from, msg ))
	{
		if( msg->cursize >= 4 && *(int *)msg->data == -1 )
		{
			cls.netchan.last_received = cls.realtime;
			CL_ConnectionlessPacket( net_from, msg );
			continue;
		}

		// can't be a valid sequenced packet	
		if( cls.state < ca_connected ) continue;

		if( msg->cursize < 8 )
		{
			MsgDev( D_WARN, "%s: runt packet\n", NET_AdrToString( net_from ));
			continue;
		}

		// packet from server
		if (!NET_CompareAdr( net_from, cls.netchan.remote_address))
		{
			MsgDev( D_WARN, "CL_ReadPackets: %s:sequenced packet without connection\n", NET_AdrToString( net_from ));
			continue;
		}

		if(Netchan_Process( &cls.netchan, msg ))
		{
			// the header is different lengths for reliable and unreliable messages
			int headerBytes = msg->readcount;

			cls.netchan.last_received = cls.realtime;
			CL_ParseServerMessage( msg );

			// we don't know if it is ok to save a demo message until
			// after we have parsed the frame
			if( cls.demorecording && !cls.demowaiting )
				CL_WriteDemoMessage( msg, headerBytes );
		}
	}
}

/*
=================
CL_ReadPackets
=================
*/
void CL_ReadPackets (void)
{
	if( cls.demoplayback )
		CL_ReadDemoMessage();
	else CL_ReadNetMessage();
}

/*
==================
CL_CheckTimeout
==================
*/
void CL_CheckTimeout( void )
{
	// check timeout
	if( !cl_paused->integer && cls.state >= ca_connected && cls.state != ca_cinematic && !cls.demoplayback )
	{
		if( cls.realtime - cls.netchan.last_received > cl_timeout->integer * 1000 )
		{
			if( ++cl.timeoutcount > 5 ) // timeoutcount saves debugger
			{
				Msg ("\nServer connection timed out.\n");
				CL_Disconnect();
				return;
			}
		}
	}
	else cl.timeoutcount = 0;
}

/*
==================
CL_SendCommand

==================
*/
void CL_SendCommand (void)
{
	// get new key events
	CL_CheckTimeout();

	// process console commands
	Cbuf_Execute();

	// send intentions now
	CL_SendCmd();

	// resend a connection request if necessary
	CL_CheckForResend();
}

/*
==================
CL_Frame

==================
*/
void CL_Frame( dword time )
{
	static dword extratime;

	if( host.type == HOST_DEDICATED )
		return;

	extratime += time;

	if( cls.state == ca_connected && extratime < HOST_FRAMETIME )
		return;	// don't flood packets out while connecting

	// decide the simulation time
	cl.time += extratime;
	cls.realtime = Sys_Milliseconds(); //FIXME: teseing with += time;
	cls.frametime = extratime * 0.001;
	extratime = 0;
          
          if( cls.frametime > (1.0 / 5)) cls.frametime = (1.0 / 5);
	
	// setup the VM frame
	CL_VM_Begin();

	// fetch results from server
	CL_ReadPackets();

	// if we haven't gotten a packet in a long time, drop the connection          
          CL_CheckTimeout();

	// send intentions now
	CL_SendCommand();

	// predict all unacknowledged movements
	CL_PredictMovement();

	// allow rendering DLL change
	if(!cl.refresh_prepped && cls.state == ca_active )
		CL_PrepRefresh();

	// update the screen
	SCR_UpdateScreen();

	// update audio
	S_Update( cl.playernum + 1, cl.refdef.vieworg, vec3_origin, cl.v_forward, cl.v_up );

	// advance local effects for next frame
	CL_RunDLights ();
	CL_RunLightStyles ();

	SCR_RunCinematic();
	Con_RunConsole();

	// end the client VM frame
	CL_VM_End();

	cls.framecount++;
}


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

/*
====================
CL_Init
====================
*/
void CL_Init( void )
{
	if( host.type == HOST_DEDICATED )
		return; // nothing running on the client

	// all archived variables will now be loaded
	scr_loading = Cvar_Get("scr_loading", "0", 0, "loading bar progress" );
	cl_paused = Cvar_Get( "paused", "0", 0, "game paused" );

	Con_Init();	
	VID_Init();
	V_Init();
	CL_InitClientProgs();

	UI_Init();
	SCR_Init();
	CL_InitLocal();
	host.cl_running = true;
}


/*
===============
CL_Shutdown

FIXME: this is a callback from Sys_Quit and Host_Error.  It would be better
to run quit through here before the final handoff to the sys code.
===============
*/
void CL_Shutdown(void)
{
	// already freed
	if(host.state == HOST_ERROR) return;

	CL_WriteConfiguration(); 
	CL_FreeClientProgs();
	UI_Shutdown();
	S_Shutdown();
	CL_ShutdownInput();
	host.cl_running = false;
}