quakespasm/Quake/host.c

/*
Copyright (C) 1996-2001 Id Software, Inc.
Copyright (C) 2002-2009 John Fitzgibbons and others
Copyright (C) 2007-2008 Kristian Duske
Copyright (C) 2010-2014 QuakeSpasm developers

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.

*/
// host.c -- coordinates spawning and killing of local servers

#include "quakedef.h"
#include "bgmusic.h"
#include <setjmp.h>

/*

A server can allways be started, even if the system started out as a client
to a remote system.

A client can NOT be started if the system started as a dedicated server.

Memory is cleared / released when a server or client begins, not when they end.

*/

quakeparms_t *host_parms;

qboolean	host_initialized;		// true if into command execution

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

int		host_framecount;

int		host_hunklevel;

int		minimum_memory;

client_t	*host_client;			// current client

jmp_buf 	host_abortserver;

byte		*host_colormap;
float	host_netinterval;
cvar_t	host_framerate = {"host_framerate","0",CVAR_NONE};	// set for slow motion
cvar_t	host_speeds = {"host_speeds","0",CVAR_NONE};			// set for running times
cvar_t	host_maxfps = {"host_maxfps", "72", CVAR_ARCHIVE}; //johnfitz
cvar_t	host_timescale = {"host_timescale", "0", CVAR_NONE}; //johnfitz
cvar_t	max_edicts = {"max_edicts", "15000", CVAR_NONE}; //johnfitz //ericw -- changed from 2048 to 8192, removed CVAR_ARCHIVE
cvar_t	cl_nocsqc = {"cl_nocsqc", "0", CVAR_NONE};	//spike -- blocks the loading of any csqc modules

cvar_t	sys_ticrate = {"sys_ticrate","0.05",CVAR_NONE}; // dedicated server
cvar_t	serverprofile = {"serverprofile","0",CVAR_NONE};

cvar_t	fraglimit = {"fraglimit","0",CVAR_NOTIFY|CVAR_SERVERINFO};
cvar_t	timelimit = {"timelimit","0",CVAR_NOTIFY|CVAR_SERVERINFO};
cvar_t	teamplay = {"teamplay","0",CVAR_NOTIFY|CVAR_SERVERINFO};
cvar_t	samelevel = {"samelevel","0",CVAR_NONE};
cvar_t	noexit = {"noexit","0",CVAR_NOTIFY|CVAR_SERVERINFO};
cvar_t	skill = {"skill","1",CVAR_NONE};			// 0 - 3
cvar_t	deathmatch = {"deathmatch","0",CVAR_NONE};	// 0, 1, or 2
cvar_t	coop = {"coop","0",CVAR_NONE};			// 0 or 1

cvar_t	pausable = {"pausable","1",CVAR_NONE};

cvar_t	developer = {"developer","0",CVAR_NONE};

static cvar_t	pr_engine = {"pr_engine", ENGINE_NAME_AND_VER, CVAR_NONE};
cvar_t	temp1 = {"temp1","0",CVAR_NONE};

cvar_t devstats = {"devstats","0",CVAR_NONE}; //johnfitz -- track developer statistics that vary every frame

devstats_t dev_stats, dev_peakstats;
overflowtimes_t dev_overflows; //this stores the last time overflow messages were displayed, not the last time overflows occured

/*
================
Max_Edicts_f -- johnfitz
================
*/
static void Max_Edicts_f (cvar_t *var)
{
	//TODO: clamp it here?
	if (cls.state == ca_connected || sv.active)
		Con_Printf ("Changes to max_edicts will not take effect until the next time a map is loaded.\n");
}

/*
================
Max_Fps_f -- ericw
================
*/
static void Max_Fps_f (cvar_t *var)
{
	if (var->value > 72 || var->value <= 0)
	{
		if (!host_netinterval)
			Con_Printf ("Using renderer/network isolation.\n");
		host_netinterval = 1.0/72;
	}
	else
	{
		if (host_netinterval)
			Con_Printf ("Disabling renderer/network isolation.\n");
		host_netinterval = 0;

		if (var->value > 72)
			Con_Warning ("host_maxfps above 72 breaks physics.\n");
	}
}

/*
================
Host_EndGame
================
*/
void Host_EndGame (const char *message, ...)
{
	va_list		argptr;
	char		string[1024];

	va_start (argptr,message);
	q_vsnprintf (string, sizeof(string), message, argptr);
	va_end (argptr);
	Con_DPrintf ("Host_EndGame: %s\n",string);

	PR_SwitchQCVM(NULL);

	if (sv.active)
		Host_ShutdownServer (false);

	if (cls.state == ca_dedicated)
		Sys_Error ("Host_EndGame: %s\n",string);	// dedicated servers exit

	if (cls.demonum != -1)
		CL_NextDemo ();
	else
		CL_Disconnect ();

	longjmp (host_abortserver, 1);
}

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

This shuts down both the client and server
================
*/
void Host_Error (const char *error, ...)
{
	va_list		argptr;
	char		string[1024];
	static	qboolean inerror = false;

	if (inerror)
		Sys_Error ("Host_Error: recursively entered");
	inerror = true;

	if (cl.qcvm.progs)
		glDisable(GL_SCISSOR_TEST);	//equivelent to drawresetcliparea, to reset any damage if we crashed in csqc.
	if (qcvm == &cls.menu_qcvm)
		MQC_Shutdown();
	PR_SwitchQCVM(NULL);

	SCR_EndLoadingPlaque ();		// reenable screen updates

	va_start (argptr,error);
	q_vsnprintf (string, sizeof(string), error, argptr);
	va_end (argptr);
	Con_Printf ("Host_Error: %s\n",string);

	Con_Redirect(NULL);

	if (sv.active)
		Host_ShutdownServer (false);

	if (cls.state == ca_dedicated)
		Sys_Error ("Host_Error: %s\n",string);	// dedicated servers exit

	CL_Disconnect ();
	cls.demonum = -1;
	cl.intermission = 0; //johnfitz -- for errors during intermissions (changelevel with no map found, etc.)

	inerror = false;

	longjmp (host_abortserver, 1);
}

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

	svs.maxclients = 1;

	i = COM_CheckParm ("-dedicated");
	if (i)
	{
		cls.state = ca_dedicated;
		if (i != (com_argc - 1))
		{
			svs.maxclients = Q_atoi (com_argv[i+1]);
		}
		else
			svs.maxclients = 8;
	}
	else
		cls.state = ca_disconnected;

	i = COM_CheckParm ("-listen");
	if (i)
	{
		if (cls.state == ca_dedicated)
			Sys_Error ("Only one of -dedicated or -listen can be specified");
		if (i != (com_argc - 1))
			svs.maxclients = Q_atoi (com_argv[i+1]);
		else
			svs.maxclients = 8;
	}
	if (svs.maxclients < 1)
		svs.maxclients = 8;
	else if (svs.maxclients > MAX_SCOREBOARD)
		svs.maxclients = MAX_SCOREBOARD;

	svs.maxclientslimit = svs.maxclients;
	if (svs.maxclientslimit < 4)
		svs.maxclientslimit = 4;
	svs.clients = (struct client_s *) Hunk_AllocName (svs.maxclientslimit*sizeof(client_t), "clients");

	if (svs.maxclients > 1)
		Cvar_SetQuick (&deathmatch, "1");
	else
		Cvar_SetQuick (&deathmatch, "0");
}

void Host_Version_f (void)
{
	Con_Printf ("Quake Version %1.2f\n", VERSION);
	Con_Printf ("QuakeSpasm Version " QUAKESPASM_VER_STRING "\n");
#ifdef QSS_VERSION
	Con_Printf ("QSS Git Description " QS_STRINGIFY(QSS_VERSION) "\n");
#endif
#ifdef QSS_REVISION
	Con_Printf ("QSS Git Revision " QS_STRINGIFY(QSS_REVISION) "\n");
#endif
	Con_Printf ("Exe: " __TIME__ " " __DATE__ "\n");
}

/* cvar callback functions : */
void Host_Callback_Notify (cvar_t *var)
{
	if (sv.active)
		SV_BroadcastPrintf ("\"%s\" changed to \"%s\"\n", var->name, var->string);
}

/*
=======================
Host_InitLocal
======================
*/
void Host_InitLocal (void)
{
	Cmd_AddCommand ("version", Host_Version_f);

	Host_InitCommands ();

	Cvar_RegisterVariable (&pr_engine);
	Cvar_RegisterVariable (&host_framerate);
	Cvar_RegisterVariable (&host_speeds);
	Cvar_RegisterVariable (&host_maxfps); //johnfitz
	Cvar_SetCallback (&host_maxfps, Max_Fps_f);
	Cvar_RegisterVariable (&host_timescale); //johnfitz

	Cvar_RegisterVariable (&cl_nocsqc);	//spike
	Cvar_RegisterVariable (&max_edicts); //johnfitz
	Cvar_SetCallback (&max_edicts, Max_Edicts_f);
	Cvar_RegisterVariable (&devstats); //johnfitz

	Cvar_RegisterVariable (&sys_ticrate);
	Cvar_RegisterVariable (&sys_throttle);
	Cvar_RegisterVariable (&serverprofile);

	Cvar_RegisterVariable (&fraglimit);
	Cvar_RegisterVariable (&timelimit);
	Cvar_RegisterVariable (&teamplay);
	Cvar_SetCallback (&fraglimit, Host_Callback_Notify);
	Cvar_SetCallback (&timelimit, Host_Callback_Notify);
	Cvar_SetCallback (&teamplay, Host_Callback_Notify);
	Cvar_RegisterVariable (&samelevel);
	Cvar_RegisterVariable (&noexit);
	Cvar_SetCallback (&noexit, Host_Callback_Notify);
	Cvar_RegisterVariable (&skill);
	Cvar_RegisterVariable (&developer);
	Cvar_RegisterVariable (&coop);
	Cvar_RegisterVariable (&deathmatch);

	Cvar_RegisterVariable (&pausable);

	Cvar_RegisterVariable (&temp1);

	Host_FindMaxClients ();
}


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

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

// dedicated servers initialize the host but don't parse and set the
// config.cfg cvars
	if (host_initialized && !isDedicated && !host_parms->errstate)
	{
		f = fopen (va("%s/config.cfg", com_gamedir), "w");
		if (!f)
		{
			Con_Printf ("Couldn't write config.cfg.\n");
			return;
		}

		//VID_SyncCvars (); //johnfitz -- write actual current mode to config file, in case cvars were messed with

		Key_WriteBindings (f);
		Cvar_WriteVariables (f);

		//johnfitz -- extra commands to preserve state
		fprintf (f, "vid_restart\n");
		if (in_mlook.state & 1) fprintf (f, "+mlook\n");
		//johnfitz

		fclose (f);
	}
}


/*
=================
SV_ClientPrintf

Sends text across to be displayed
FIXME: make this just a stuffed echo?
=================
*/
void SV_ClientPrintf (const char *fmt, ...)
{
	va_list		argptr;
	char		string[1024];

	va_start (argptr,fmt);
	q_vsnprintf (string, sizeof(string), fmt,argptr);
	va_end (argptr);

	MSG_WriteByte (&host_client->message, svc_print);
	MSG_WriteString (&host_client->message, string);
}

/*
=================
SV_BroadcastPrintf

Sends text to all active clients
=================
*/
void SV_BroadcastPrintf (const char *fmt, ...)
{
	va_list		argptr;
	char		string[1024];
	int			i;

	va_start (argptr,fmt);
	q_vsnprintf (string, sizeof(string), fmt, argptr);
	va_end (argptr);

	for (i = 0; i < svs.maxclients; i++)
	{
		if (svs.clients[i].active && svs.clients[i].spawned)
		{
			MSG_WriteByte (&svs.clients[i].message, svc_print);
			MSG_WriteString (&svs.clients[i].message, string);
		}
	}
}

/*
=================
Host_ClientCommands

Send text over to the client to be executed
=================
*/
void Host_ClientCommands (const char *fmt, ...)
{
	va_list		argptr;
	char		string[1024];

	va_start (argptr,fmt);
	q_vsnprintf (string, sizeof(string), fmt, argptr);
	va_end (argptr);

	MSG_WriteByte (&host_client->message, svc_stufftext);
	MSG_WriteString (&host_client->message, string);
}

/*
=====================
SV_DropClient

Called when the player is getting totally kicked off the host
if (crash = true), don't bother sending signofs
=====================
*/
void SV_DropClient (qboolean crash)
{
	int		saveSelf;
	int		i;
	client_t *client;

	if (!crash)
	{
		// send any final messages (don't check for errors)
		if (NET_CanSendMessage (host_client->netconnection))
		{
			MSG_WriteByte (&host_client->message, svc_disconnect);
			NET_SendMessage (host_client->netconnection, &host_client->message);
		}

		if (host_client->edict && host_client->spawned)
		{
		// call the prog function for removing a client
		// this will set the body to a dead frame, among other things
			qcvm_t *oldvm = qcvm;
			PR_SwitchQCVM(NULL);
			PR_SwitchQCVM(&sv.qcvm);
			saveSelf = pr_global_struct->self;
			pr_global_struct->self = EDICT_TO_PROG(host_client->edict);
			PR_ExecuteProgram (pr_global_struct->ClientDisconnect);
			pr_global_struct->self = saveSelf;
			PR_SwitchQCVM(NULL);
			PR_SwitchQCVM(oldvm);
		}

		Sys_Printf ("Client %s removed\n",host_client->name);
	}

// break the net connection
	NET_Close (host_client->netconnection);
	host_client->netconnection = NULL;

	SVFTE_DestroyFrames(host_client);	//release any delta state

// free the client (the body stays around)
	host_client->active = false;
	host_client->name[0] = 0;
	host_client->old_frags = -999999;
	net_activeconnections--;

	if (host_client->download.file)
		fclose(host_client->download.file);
	memset(&host_client->download, 0, sizeof(host_client->download));

// send notification to all clients
	for (i = 0, client = svs.clients; i < svs.maxclients; i++, client++)
	{
		if (!client->knowntoqc)
			continue;
		MSG_WriteByte (&client->message, svc_updatename);
		MSG_WriteByte (&client->message, host_client - svs.clients);
		MSG_WriteString (&client->message, "");
		MSG_WriteByte (&client->message, svc_updatefrags);
		MSG_WriteByte (&client->message, host_client - svs.clients);
		MSG_WriteShort (&client->message, 0);
		MSG_WriteByte (&client->message, svc_updatecolors);
		MSG_WriteByte (&client->message, host_client - svs.clients);
		MSG_WriteByte (&client->message, 0);
	}
}

/*
==================
Host_ShutdownServer

This only happens at the end of a game, not between levels
==================
*/
void Host_ShutdownServer(qboolean crash)
{
	int		i;
	int		count;
	sizebuf_t	buf;
	byte		message[4];
	double	start;

	if (!sv.active)
		return;

	sv.active = false;

// stop all client sounds immediately
	if (cls.state == ca_connected)
		CL_Disconnect ();

// flush any pending messages - like the score!!!
	start = Sys_DoubleTime();
	do
	{
		count = 0;
		for (i=0, host_client = svs.clients ; i<svs.maxclients ; i++, host_client++)
		{
			if (host_client->active && host_client->message.cursize && host_client->netconnection)
			{
				if (NET_CanSendMessage (host_client->netconnection))
				{
					NET_SendMessage(host_client->netconnection, &host_client->message);
					SZ_Clear (&host_client->message);
				}
				else
				{
					NET_GetMessage(host_client->netconnection);
					count++;
				}
			}
		}
		if ((Sys_DoubleTime() - start) > 3.0)
			break;
	}
	while (count);

// make sure all the clients know we're disconnecting
	buf.data = message;
	buf.maxsize = 4;
	buf.cursize = 0;
	MSG_WriteByte(&buf, svc_disconnect);
	count = NET_SendToAll(&buf, 5.0);
	if (count)
		Con_Printf("Host_ShutdownServer: NET_SendToAll failed for %u clients\n", count);

	PR_SwitchQCVM(&sv.qcvm);
	for (i = 0, host_client = svs.clients; i < svs.maxclients; i++, host_client++)
		if (host_client->active)
			SV_DropClient(crash);
	
	qcvm->worldmodel = NULL;
	PR_SwitchQCVM(NULL);

//
// clear structures
//
//	memset (&sv, 0, sizeof(sv)); // ServerSpawn already do this by Host_ClearMemory
	memset (svs.clients, 0, svs.maxclientslimit*sizeof(client_t));
}


/*
================
Host_ClearMemory

This clears all the memory used by both the client and server, but does
not reinitialize anything.
================
*/
void Host_ClearMemory (void)
{
	Con_DPrintf ("Clearing memory\n");
	D_FlushCaches ();
	Mod_ClearAll ();
/* host_hunklevel MUST be set at this point */
	Hunk_FreeToLowMark (host_hunklevel);
	cls.signon = 0;
	PR_ClearProgs(&sv.qcvm);
	free(sv.static_entities);	//spike -- this is dynamic too, now
	free(sv.ambientsounds);
	memset (&sv, 0, sizeof(sv));

	CL_FreeState();
}


//==============================================================================
//
// Host Frame
//
//==============================================================================

/*
===================
Host_FilterTime

Returns false if the time is too short to run a frame
===================
*/
qboolean Host_FilterTime (float time)
{
	float maxfps; //johnfitz

	realtime += time;

	//johnfitz -- max fps cvar
	maxfps = CLAMP (10.0, host_maxfps.value, 1000.0);
	if (host_maxfps.value && !cls.timedemo && realtime - oldrealtime < 1.0/maxfps)
		return false; // framerate is too high
	//johnfitz

	host_frametime = realtime - oldrealtime;
	oldrealtime = realtime;

	//johnfitz -- host_timescale is more intuitive than host_framerate
	if (host_timescale.value > 0)
		host_frametime *= host_timescale.value;
	//johnfitz
	else if (host_framerate.value > 0)
		host_frametime = host_framerate.value;
	else if (host_maxfps.value)// don't allow really long or short frames
		host_frametime = CLAMP (0.0001, host_frametime, 0.1); //johnfitz -- use CLAMP

	return true;
}

/*
===================
Host_GetConsoleCommands

Add them exactly as if they had been typed at the console
===================
*/
void Host_GetConsoleCommands (void)
{
	const char	*cmd;

	if (!isDedicated)
		return;	// no stdin necessary in graphical mode

	while (1)
	{
		cmd = Sys_ConsoleInput ();
		if (!cmd)
			break;
		Cbuf_AddText (cmd);
	}
}

/*
==================
Host_ServerFrame
==================
*/
void Host_ServerFrame (void)
{
	int		i, active; //johnfitz
	edict_t	*ent; //johnfitz

// run the world state
	pr_global_struct->frametime = host_frametime;

// set the time and clear the general datagram
	SV_ClearDatagram ();

// check for new clients
	SV_CheckForNewClients ();

// read client messages
	SV_RunClients ();

// move things around and think
// always pause in single player if in console or menus
	if (!sv.paused && (svs.maxclients > 1 || key_dest == key_game) )
		SV_Physics ();

//johnfitz -- devstats
	if (cls.signon == SIGNONS)
	{
		for (i=0, active=0; i<qcvm->num_edicts; i++)
		{
			ent = EDICT_NUM(i);
			if (!ent->free)
				active++;
		}
		if (active > 600 && dev_peakstats.edicts <= 600)
			Con_DWarning ("%i edicts exceeds standard limit of 600 (max = %d).\n", active, qcvm->max_edicts);
		dev_stats.edicts = active;
		dev_peakstats.edicts = q_max(active, dev_peakstats.edicts);
	}
//johnfitz

// send all messages to the clients
	SV_SendClientMessages ();
}

//used for cl.qcvm.GetModel (so ssqc+csqc can share builtins)
qmodel_t *CL_ModelForIndex(int index)
{
	if (index < 0 || index >= MAX_MODELS)
		return NULL;
	return cl.model_precache[index];
}

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

Runs all active servers
==================
*/
void _Host_Frame (double time)
{
	static double	accumtime = 0;
	static double		time1 = 0;
	static double		time2 = 0;
	static double		time3 = 0;
	int			pass1, pass2, pass3;

	if (setjmp (host_abortserver) )
		return;			// something bad happened, or the server disconnected

// keep the random time dependent
	rand ();

// decide the simulation time
	accumtime += host_netinterval?CLAMP(0, time, 0.2):0;	//for renderer/server isolation
	if (!Host_FilterTime (time))
		return;			// don't run too fast, or packets will flood out

// get new key events
	Key_UpdateForDest ();
	IN_UpdateInputMode ();
	Sys_SendKeyEvents ();

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

//check the stdin for commands (dedicated servers)
	Host_GetConsoleCommands ();

// process console commands
	Cbuf_Execute ();

	NET_Poll();

	if (cl.sendprespawn)
	{
		if (CL_CheckDownloads())
		{
			PR_ClearProgs(&cl.qcvm);
			if (pr_checkextension.value && !cl_nocsqc.value)
			{	//only try to use csqc if qc extensions are enabled.
				PR_SwitchQCVM(&cl.qcvm);
				//try csprogs.dat first, then fall back on progs.dat in case someone tried merging the two.
				//we only care about it if it actually contains a CSQC_DrawHud, otherwise its either just a (misnamed) ssqc progs or a full csqc progs that would just crash us on 3d stuff.
				if ((PR_LoadProgs("csprogs.dat", false, PROGHEADER_CRC, pr_csqcbuiltins, pr_csqcnumbuiltins) && qcvm->extfuncs.CSQC_DrawHud)||
					(PR_LoadProgs("progs.dat",   false, PROGHEADER_CRC, pr_csqcbuiltins, pr_csqcnumbuiltins) && qcvm->extfuncs.CSQC_DrawHud))
				{
					qcvm->max_edicts = CLAMP (MIN_EDICTS,(int)max_edicts.value,MAX_EDICTS);
					qcvm->edicts = (edict_t *) malloc (qcvm->max_edicts*qcvm->edict_size);
					qcvm->num_edicts = qcvm->reserved_edicts = 1;
					memset(qcvm->edicts, 0, qcvm->num_edicts*qcvm->edict_size);

					//set a few globals, if they exist
					if (qcvm->extglobals.maxclients)
						*qcvm->extglobals.maxclients = cl.maxclients;
					pr_global_struct->time = cl.time;
					pr_global_struct->mapname = PR_SetEngineString(cl.mapname);
					pr_global_struct->total_monsters = cl.statsf[STAT_TOTALMONSTERS];
					pr_global_struct->total_secrets = cl.statsf[STAT_TOTALSECRETS];
					pr_global_struct->deathmatch = cl.gametype;
					pr_global_struct->coop = (cl.gametype == GAME_COOP) && cl.maxclients != 1;
					if (qcvm->extglobals.player_localnum)
						*qcvm->extglobals.player_localnum = cl.viewentity-1;	//this is a guess, but is important for scoreboards.

					//set a few worldspawn fields too
					qcvm->edicts->v.message = PR_SetEngineString(cl.levelname);

					//and call the init function... if it exists.
					qcvm->worldmodel = cl.worldmodel;
					SV_ClearWorld();
					if (qcvm->extfuncs.CSQC_Init)
					{
						G_FLOAT(OFS_PARM0) = 0;
						G_INT(OFS_PARM1) = PR_SetEngineString("QuakeSpasm-Spiked");
						G_FLOAT(OFS_PARM2) = QUAKESPASM_VERSION;
						PR_ExecuteProgram(qcvm->extfuncs.CSQC_Init);
					}
				}
				else
					PR_ClearProgs(qcvm);
				PR_SwitchQCVM(NULL);
			}

			cl.sendprespawn = false;
			MSG_WriteByte (&cls.message, clc_stringcmd);
			MSG_WriteString (&cls.message, "prespawn");
			vid.recalc_refdef = true;
		}
		else if (!cls.message.cursize)
			MSG_WriteByte (&cls.message, clc_nop);
	}

	CL_AccumulateCmd ();

	//Run the server+networking (client->server->client), at a different rate from everything else
	if (accumtime >= host_netinterval)
	{
		float realframetime = host_frametime;
		if (host_netinterval)
		{
			host_frametime = q_max(accumtime, host_netinterval);
			accumtime -= host_frametime;
			if (host_timescale.value > 0)
				host_frametime *= host_timescale.value;
			else if (host_framerate.value)
				host_frametime = host_framerate.value;
		}
		else
			accumtime -= host_netinterval;
		CL_SendCmd ();
		if (sv.active)
		{
			PR_SwitchQCVM(&sv.qcvm);
			Host_ServerFrame ();
			PR_SwitchQCVM(NULL);
		}
		host_frametime = realframetime;
		Cbuf_Waited();
	}

// fetch results from server
	if (cls.state == ca_connected)
		CL_ReadFromServer ();

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

	SCR_UpdateScreen ();

	CL_RunParticles (); //johnfitz -- seperated from rendering

	if (host_speeds.value)
		time2 = Sys_DoubleTime ();

// update audio
	BGM_Update();	// adds music raw samples and/or advances midi driver
	if (cls.signon == SIGNONS)
	{
		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++;

}

void Host_Frame (double time)
{
	double	time1, time2;
	static double	timetotal;
	static int		timecount;
	int		i, c, m;

	if (!serverprofile.value)
	{
		_Host_Frame (time);
		return;
	}

	time1 = Sys_DoubleTime ();
	_Host_Frame (time);
	time2 = Sys_DoubleTime ();

	timetotal += time2 - time1;
	timecount++;

	if (timecount < 1000)
		return;

	m = timetotal*1000/timecount;
	timecount = 0;
	timetotal = 0;
	c = 0;
	for (i = 0; i < svs.maxclients; i++)
	{
		if (svs.clients[i].active)
			c++;
	}

	Con_Printf ("serverprofile: %2i clients %2i msec\n",  c,  m);
}

/*
====================
Host_Init
====================
*/
void Host_Init (void)
{
	if (standard_quake)
		minimum_memory = MINIMUM_MEMORY;
	else	minimum_memory = MINIMUM_MEMORY_LEVELPAK;

	if (COM_CheckParm ("-minmemory"))
		host_parms->memsize = minimum_memory;

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

	com_argc = host_parms->argc;
	com_argv = host_parms->argv;

	Memory_Init (host_parms->membase, host_parms->memsize);
	Cbuf_Init ();
	Cmd_Init ();
	LOG_Init (host_parms);
	Cvar_Init (); //johnfitz
	COM_Init ();
	COM_InitFilesystem ();
	Host_InitLocal ();
	W_LoadWadFile (); //johnfitz -- filename is now hard-coded for honesty
	if (cls.state != ca_dedicated)
	{
		Key_Init ();
		Con_Init ();
	}
	PR_Init ();
	Mod_Init ();
	NET_Init ();
	SV_Init ();

	Con_Printf ("Exe: " __TIME__ " " __DATE__ "\n");
	Con_Printf ("%4.1f megabyte heap\n", host_parms->memsize/ (1024*1024.0));

	if (cls.state != ca_dedicated)
	{
		host_colormap = (byte *)COM_LoadHunkFile ("gfx/colormap.lmp", NULL);
		if (!host_colormap)
			Sys_Error ("Couldn't load gfx/colormap.lmp");

		V_Init ();
		Chase_Init ();
		ExtraMaps_Init (); //johnfitz
		Modlist_Init (); //johnfitz
		DemoList_Init (); //ericw
		VID_Init ();
		IN_Init ();
		TexMgr_Init (); //johnfitz
		Draw_Init ();
		SCR_Init ();
		R_Init ();
		S_Init ();
		CDAudio_Init ();
		BGM_Init();
		Sbar_Init ();
		CL_Init ();
	}

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

	host_initialized = true;
	Con_Printf ("\n========= Quake Initialized =========\n\n");


	//okay... now we can do stuff that's allowed to Host_Error
	if (setjmp (host_abortserver) )
		return;			// something bad happened
	if (cls.state != ca_dedicated)
		M_Init ();
	if (setjmp (host_abortserver) )
		return;			// don't do the above twice if the following Cbuf_Execute does bad things.


	//spike -- create these aliases, because they're useful.
	Cbuf_AddText ("alias startmap_sp \"map start\"\n");
	Cbuf_AddText ("alias startmap_dm \"map start\"\n");

	if (cls.state != ca_dedicated)
	{
		Cbuf_AddText ("cl_warncmd 0\n");
		Cbuf_InsertText ("exec quake.rc\n");
	// johnfitz -- in case the vid mode was locked during vid_init, we can unlock it now.
		// note: two leading newlines because the command buffer swallows one of them.
		Cbuf_AddText ("\n\nvid_unlock\n");
	}

	if (cls.state == ca_dedicated)
	{
		Cbuf_AddText ("cl_warncmd 0\n");
		Cbuf_AddText ("exec default.cfg\n");	//spike -- someone decided that quake.rc shouldn't be execed on dedicated servers, but that means you'll get bad defaults
		Cbuf_AddText ("cl_warncmd 1\n");
		Cbuf_AddText ("exec server.cfg\n");		//spike -- for people who want things explicit.
		Cbuf_AddText ("exec autoexec.cfg\n");
		Cbuf_AddText ("stuffcmds");
		Cbuf_Execute ();
		if (!sv.active)
			Cbuf_AddText ("startmap_dm\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;

// keep Con_Printf from trying to update the screen
	scr_disabled_for_loading = true;

	Host_WriteConfiguration ();

	NET_Shutdown ();

	if (cls.state != ca_dedicated)
	{
		if (con_initialized)
			History_Shutdown ();
		BGM_Shutdown();
		CDAudio_Shutdown ();
		S_Shutdown ();
		IN_Shutdown ();
		VID_Shutdown();
	}

	LOG_Close ();
}