quakeforge/qw/source/sv_main.c

/*
	sv_main.c

	(description)

	Copyright (C) 1996-1997  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:

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

	$Id$
*/

#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#ifdef HAVE_STRING_H
# include <string.h>
#endif
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif

#include <stdarg.h>
#include <stdlib.h>

#include "QF/cmd.h"
#include "QF/console.h"
#include "QF/cvar.h"
#include "QF/model.h"
#include "QF/msg.h"
#include "QF/plugin.h"
#include "QF/qargs.h"
#include "QF/sys.h"
#include "QF/va.h"
#include "QF/ver_check.h"
#include "QF/vfs.h"
#include "QF/zone.h"

#include "bothdefs.h"
#include "buildnum.h"
#include "compat.h"
#include "game.h"
#include "net.h"
#include "pmove.h"
#include "server.h"
#include "sv_progs.h"
#include "crudefile.h"

quakeparms_t host_parms;
qboolean    host_initialized;			// true if into command execution

qboolean    rcon_from_user;

double      sv_frametime;
double      realtime;					// without any filtering or bounding

int         host_hunklevel;

netadr_t    master_adr[MAX_MASTERS];	// address of group servers

client_t   *host_client;				// current client

// DoS protection
// FLOOD_PING, FLOOD_LOG, FLOOD_CONNECT, FLOOD_STATUS, FLOOD_RCON, FLOOD_BAN
// FIXME: these default values need to be tweaked after more testing

double      netdosexpire[DOSFLOODCMDS] = { 1, 1, 2, 0.9, 1, 5 };
double      netdosvalues[DOSFLOODCMDS] = { 12, 1, 3, 1, 1, 1 };

cvar_t     *sv_netdosprotect;			// tone down DoS from quake servers

cvar_t     *sv_allow_status;
cvar_t     *sv_allow_log;
cvar_t     *sv_allow_ping;

cvar_t     *fs_globalcfg;
cvar_t     *fs_usercfg;

cvar_t     *sv_mintic;					// bound the size of the
cvar_t     *sv_maxtic;					// physics time tic

cvar_t     *timeout;					// seconds without any message
cvar_t     *zombietime;					// seconds to sink messages after

										// disconnect

cvar_t     *rcon_password;				// password for remote server
cvar_t     *admin_password;				// password for admin

										// commands

cvar_t     *password;					// password for entering the game
cvar_t     *spectator_password;			// password for entering as a

										// spectator

cvar_t     *allow_download;
cvar_t     *allow_download_skins;
cvar_t     *allow_download_models;
cvar_t     *allow_download_sounds;
cvar_t     *allow_download_maps;

cvar_t     *sv_highchars;

cvar_t     *sv_phs;

cvar_t     *pausable;

extern cvar_t *sv_timekick;
extern cvar_t *sv_timekick_fuzz;
extern cvar_t *sv_timekick_interval;

cvar_t     *sv_minqfversion;			// Minimum QF version allowed to

										// connect
cvar_t     *sv_maxrate;					// Maximum allowable rate (silently

										// capped)

cvar_t     *sv_timestamps;
cvar_t     *sv_timefmt;

//
// game rules mirrored in svs.info
//
cvar_t     *fraglimit;
cvar_t     *timelimit;
cvar_t     *teamplay;
cvar_t     *samelevel;
cvar_t     *maxclients;
cvar_t     *maxspectators;
cvar_t     *deathmatch;					// 0, 1, or 2
cvar_t     *spawn;
cvar_t     *watervis;

cvar_t     *hostname;

VFile      *sv_logfile;
VFile      *sv_fraglogfile;

cvar_t     *sv_gc;
int         sv_gc_count = 0;

void        SV_AcceptClient (netadr_t adr, int userid, char *userinfo);
void        Master_Shutdown (void);

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

qboolean
ServerPaused (void)
{
	return sv.paused;
}

/*
	SV_Shutdown

	Quake calls this before calling Sys_Quit or Sys_Error
*/
void
SV_Shutdown (void)
{
	Master_Shutdown ();
	if (sv_logfile) {
		Qclose (sv_logfile);
		sv_logfile = NULL;
	}
	if (sv_fraglogfile) {
		Qclose (sv_fraglogfile);
		sv_logfile = NULL;
	}
	NET_Shutdown ();
	Con_Shutdown ();
}

/*
	SV_Error

	Sends a datagram to all the clients informing them of the server crash,
	then exits
*/
void
SV_Error (const char *error, ...)
{
	va_list     argptr;
	static char string[1024];
	static qboolean inerror = false;

	if (inerror)
		Sys_Error ("SV_Error: recursively entered (%s)", string);

	inerror = true;

	va_start (argptr, error);
	vsnprintf (string, sizeof (string), error, argptr);
	va_end (argptr);

	SV_Printf ("SV_Error: %s\n", string);

	SV_FinalMessage (va ("server crashed: %s\n", string));

	SV_Shutdown ();

	Sys_Error ("SV_Error: %s\n", string);
}

/*
	SV_FinalMessage

	Used by SV_Error and SV_Quit_f to send a final message to all connected
	clients before the server goes down.  The messages are sent immediately,
	not just stuck on the outgoing message list, because the server is going
	to totally exit after returning from this function.
*/
void
SV_FinalMessage (const char *message)
{
	int         i;
	client_t   *cl;

	SZ_Clear (net_message->message);
	MSG_WriteByte (net_message->message, svc_print);
	MSG_WriteByte (net_message->message, PRINT_HIGH);
	MSG_WriteString (net_message->message, message);
	MSG_WriteByte (net_message->message, svc_disconnect);

	for (i = 0, cl = svs.clients; i < MAX_CLIENTS; i++, cl++)
		if (cl->state >= cs_spawned)
			Netchan_Transmit (&cl->netchan, net_message->message->cursize,
							  net_message->message->data);
}

/*
	SV_DropClient

	Called when the player is totally leaving the server, either willingly
	or unwillingly.  This is NOT called if the entire server is quiting
	or crashing.
*/
void
SV_DropClient (client_t *drop)
{
	// add the disconnect
	MSG_WriteByte (&drop->netchan.message, svc_disconnect);

	if (drop->state == cs_spawned) {
		if (!drop->spectator) {
			// call the prog function for removing a client
			// this will set the body to a dead frame, among other things
			*sv_globals.self = EDICT_TO_PROG (&sv_pr_state, drop->edict);
			PR_ExecuteProgram (&sv_pr_state, sv_funcs.ClientDisconnect);
		} else if (SpectatorDisconnect) {
			// call the prog function for removing a client
			// this will set the body to a dead frame, among other things
			*sv_globals.self = EDICT_TO_PROG (&sv_pr_state, drop->edict);
			PR_ExecuteProgram (&sv_pr_state, SpectatorDisconnect);
		}
	}
	if (drop->spectator)
		SV_Printf ("Spectator %s removed\n", drop->name);
	else
		SV_Printf ("Client %s removed\n", drop->name);

	if (drop->download) {
		Qclose (drop->download);
		drop->download = NULL;
	}
	if (drop->upload) {
		Qclose (drop->upload);
		drop->upload = NULL;
	}
	*drop->uploadfn = 0;

	drop->state = cs_zombie;			// become free in a few seconds
	drop->connection_started = realtime;	// for zombie timeout

	drop->old_frags = 0;
	SVfloat (drop->edict, frags) = 0;
	drop->name[0] = 0;
	memset (drop->userinfo, 0, sizeof (drop->userinfo));

	// send notification to all remaining clients
	SV_FullClientUpdate (drop, &sv.reliable_datagram);
}


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

/*
	SV_CalcPing
*/
int
SV_CalcPing (client_t *cl)
{
	float       ping;
	int         i;
	int         count;
	register client_frame_t *frame;

	ping = 0;
	count = 0;
	for (frame = cl->frames, i = 0; i < UPDATE_BACKUP; i++, frame++) {
		if (frame->ping_time > 0) {
			ping += frame->ping_time;
			count++;
		}
	}
	if (!count)
		return 9999;
	ping /= count;

	return ping * 1000;
}

/*
	SV_FullClientUpdate

	Writes all update values to a sizebuf
*/
void
SV_FullClientUpdate (client_t *client, sizebuf_t *buf)
{
	int         i;
	char        info[MAX_INFO_STRING];

	i = client - svs.clients;

//  SV_Printf("SV_FullClientUpdate:  Updated frags for client %d\n", i);

	MSG_WriteByte (buf, svc_updatefrags);
	MSG_WriteByte (buf, i);
	MSG_WriteShort (buf, client->old_frags);

	MSG_WriteByte (buf, svc_updateping);
	MSG_WriteByte (buf, i);
	MSG_WriteShort (buf, SV_CalcPing (client));

	MSG_WriteByte (buf, svc_updatepl);
	MSG_WriteByte (buf, i);
	MSG_WriteByte (buf, client->lossage);

	MSG_WriteByte (buf, svc_updateentertime);
	MSG_WriteByte (buf, i);
	MSG_WriteFloat (buf, realtime - client->connection_started);

	strncpy (info, client->userinfo, sizeof (info));
	Info_RemovePrefixedKeys (info, '_');	// server passwords, etc

	MSG_WriteByte (buf, svc_updateuserinfo);
	MSG_WriteByte (buf, i);
	MSG_WriteLong (buf, client->userid);
	MSG_WriteString (buf, info);
}

/*
	SV_FullClientUpdateToClient

	Writes all update values to a client's reliable stream
*/
void
SV_FullClientUpdateToClient (client_t *client, client_t *cl)
{
	ClientReliableCheckBlock (cl, 24 + strlen (client->userinfo));
	if (cl->num_backbuf) {
		SV_FullClientUpdate (client, &cl->backbuf);
		ClientReliable_FinishWrite (cl);
	} else
		SV_FullClientUpdate (client, &cl->netchan.message);
}


/*
	CONNECTIONLESS COMMANDS
*/

/*
	CheckForFlood :: EXPERIMENTAL

	Makes it more difficult to use Quake servers for DoS attacks against
	other sites.

	Bad sides: affects gamespy and spytools somewhat...
*/

int
CheckForFlood (flood_enum_t cmdtype)
{
	static qboolean firsttime = true;
	static flood_t floodstatus[DOSFLOODCMDS][DOSFLOODIP];

	int         i;
	double      currenttime;
	double      oldestTime;
	static double lastmessagetime = 0;
	int         oldest;

	if (!sv_netdosprotect->int_val)
		return 0;

	oldestTime = 0x7fffffff;
	oldest = 0;

	if (firsttime) {
		memset (floodstatus, sizeof (flood_t) * DOSFLOODCMDS * DOSFLOODIP, 0);

		firsttime = false;
	}

	currenttime = Sys_DoubleTime ();

	for (i = 0; i < DOSFLOODIP; i++) {
		if (NET_CompareBaseAdr (net_from, floodstatus[cmdtype][i].adr))
			break;
		if (floodstatus[cmdtype][i].issued < oldestTime) {
			oldestTime = floodstatus[cmdtype][i].issued;
			oldest = i;
		}
	}

	if (i < DOSFLOODIP && floodstatus[cmdtype][i].issued) {
		if ((floodstatus[cmdtype][i].issued + netdosexpire[cmdtype])
			> currenttime) {
			floodstatus[cmdtype][i].floodcount += 1;
			if (floodstatus[cmdtype][i].floodcount > netdosvalues[cmdtype]) {
				if ((lastmessagetime + 5) < currenttime)
					SV_Printf ("Blocking type %d flood from (or to) %s\n",
								cmdtype, NET_AdrToString (net_from));
				floodstatus[cmdtype][i].floodcount = 0;
				floodstatus[cmdtype][i].issued = currenttime;
				floodstatus[cmdtype][i].cmdcount += 1;
				lastmessagetime = currenttime;
				return 1;
			}
		} else {
			floodstatus[cmdtype][i].floodcount = 0;
		}
	}

	if (i == DOSFLOODIP) {
		i = oldest;
		floodstatus[cmdtype][i].adr = net_from;
		floodstatus[cmdtype][i].firstseen = currenttime;
		floodstatus[cmdtype][i].cmdcount = 0;
		floodstatus[cmdtype][i].floodcount = 0;
	}
	floodstatus[cmdtype][i].issued = currenttime;
	floodstatus[cmdtype][i].cmdcount += 1;
	return 0;
}

/*
	SVC_Status

	Responds with all the info that qplug or qspy can see
	This message can be up to around 5k with worst case string lengths.
*/
void
SVC_Status (void)
{
	int         i;
	client_t   *cl;
	int         ping;
	int         top, bottom;

	extern int  con_printf_no_log;

	if (!sv_allow_status->int_val)
		return;
	if (CheckForFlood (FLOOD_STATUS))
		return;

	con_printf_no_log = 1;
	Cmd_TokenizeString ("status");
	SV_BeginRedirect (RD_PACKET);
	SV_Printf ("%s\n", svs.info);
	for (i = 0; i < MAX_CLIENTS; i++) {
		cl = &svs.clients[i];
		if ((cl->state == cs_connected || cl->state == cs_spawned)
			&& !cl->spectator) {
			top = atoi (Info_ValueForKey (cl->userinfo, "topcolor"));
			bottom = atoi (Info_ValueForKey (cl->userinfo, "bottomcolor"));
			top = (top < 0) ? 0 : ((top > 13) ? 13 : top);
			bottom = (bottom < 0) ? 0 : ((bottom > 13) ? 13 : bottom);
			ping = SV_CalcPing (cl);
			SV_Printf ("%i %i %i %i \"%s\" \"%s\" %i %i\n", cl->userid,
						cl->old_frags,
						(int) (realtime - cl->connection_started) / 60, ping,
						cl->name, Info_ValueForKey (cl->userinfo, "skin"), top,
						bottom);
		}
	}
	SV_EndRedirect ();
	con_printf_no_log = 0;
}

/*
	SV_CheckLog
*/
#define	LOG_HIGHWATER	4096
#define	LOG_FLUSH		10*60
void
SV_CheckLog (void)
{
	sizebuf_t  *sz;

	sz = &svs.log[svs.logsequence & 1];

	// bump sequence if allmost full, or ten minutes have passed and
	// there is something still sitting there
	if (sz->cursize > LOG_HIGHWATER
		|| (realtime - svs.logtime > LOG_FLUSH && sz->cursize)) {
		// swap buffers and bump sequence
		svs.logtime = realtime;
		svs.logsequence++;
		sz = &svs.log[svs.logsequence & 1];
		sz->cursize = 0;
		SV_Printf ("beginning fraglog sequence %i\n", svs.logsequence);
	}

}

/*
	SVC_Log

	Responds with all the logged frags for ranking programs.
	If a sequence number is passed as a parameter and it is
	the same as the current sequence, an A2A_NACK will be returned
	instead of the data.
*/
void
SVC_Log (void)
{
	int         seq;
	char        data[MAX_DATAGRAM + 64];

	if (!sv_allow_log->int_val)
		return;
	if (CheckForFlood (FLOOD_LOG))
		return;

	if (Cmd_Argc () == 2)
		seq = atoi (Cmd_Argv (1));
	else
		seq = -1;

	if (seq == svs.logsequence - 1 || !sv_fraglogfile) {	// they already
		// have this
		// data, or we
		// aren't logging 
		// frags
		data[0] = A2A_NACK;
		NET_SendPacket (1, data, net_from);
		return;
	}

	Con_DPrintf ("sending log %i to %s\n", svs.logsequence - 1,
				 NET_AdrToString (net_from));

	// snprintf (data, sizeof (data), "stdlog %i\n", svs.logsequence-1);
	// strncat (data,  (char *)svs.log_buf[((svs.logsequence-1)&1)],
	// sizeof(data) - strlen (data));
	snprintf (data, sizeof (data), "stdlog %i\n%s",
			  svs.logsequence - 1,
			  (char *) svs.log_buf[((svs.logsequence - 1) & 1)]);

	NET_SendPacket (strlen (data) + 1, data, net_from);
}

/*
	SVC_Ping

	Just responds with an acknowledgement
*/
void
SVC_Ping (void)
{
	char        data;

	if (!sv_allow_ping->int_val)
		return;
	if (CheckForFlood (FLOOD_PING))
		return;

	data = A2A_ACK;

	NET_SendPacket (1, &data, net_from);
}

/*
	SVC_GetChallenge

	Returns a challenge number that can be used
	in a subsequent client_connect command.
	We do this to prevent denial of service attacks that
	flood the server with invalid connection IPs.  With a
	challenge, they must give a valid IP address.
*/
void
SVC_GetChallenge (void)
{
	int         i;
	int         oldest;
	int         oldestTime;

	oldest = 0;
	oldestTime = 0x7fffffff;

	// see if we already have a challenge for this ip
	for (i = 0; i < MAX_CHALLENGES; i++) {
		if (NET_CompareBaseAdr (net_from, svs.challenges[i].adr))
			break;
		if (svs.challenges[i].time < oldestTime) {
			oldestTime = svs.challenges[i].time;
			oldest = i;
		}
	}

	if (i == MAX_CHALLENGES) {
		// overwrite the oldest
		svs.challenges[oldest].challenge = (rand () << 16) ^ rand ();
		svs.challenges[oldest].adr = net_from;
		svs.challenges[oldest].time = realtime;
		i = oldest;
	}
	// send it back
	Netchan_OutOfBandPrint (net_from, "%c%i QF", S2C_CHALLENGE,
							svs.challenges[i].challenge);
}

/*
	SVC_DirectConnect

	A connection request that did not come from the master
*/
void
SVC_DirectConnect (void)
{
	char        userinfo[1024];
	static int  userid;
	netadr_t    adr;
	int         i;
	client_t   *cl, *newcl;
	client_t    temp;
	edict_t    *ent;
	int         edictnum;
	const char *s;
	int         clients, spectators;
	qboolean    spectator;
	int         qport;
	int         version;
	int         challenge;

	if (CheckForFlood (FLOOD_CONNECT))
		return;

	version = atoi (Cmd_Argv (1));
	if (version != PROTOCOL_VERSION) {
		Netchan_OutOfBandPrint (net_from, "%c\nServer is version %s.\n",
								A2C_PRINT, QW_VERSION);
		SV_Printf ("* rejected connect from version %i\n", version);
		return;
	}

	qport = atoi (Cmd_Argv (2));

	challenge = atoi (Cmd_Argv (3));

	// note an extra byte is needed to replace spectator key
	strncpy (userinfo, Cmd_Argv (4), sizeof (userinfo) - 2);
	userinfo[sizeof (userinfo) - 2] = 0;

	// Validate the userinfo string.
	if (!Info_Validate(userinfo)) {
		Netchan_OutOfBandPrint (net_from, "%c\nInvalid userinfo string.\n",
								A2C_PRINT);
		return;
	}

	// see if the challenge is valid
	for (i = 0; i < MAX_CHALLENGES; i++) {
		if (NET_CompareBaseAdr (net_from, svs.challenges[i].adr)) {
			if (challenge == svs.challenges[i].challenge)
				break;					// good
			Netchan_OutOfBandPrint (net_from, "%c\nBad challenge.\n",
									A2C_PRINT);
			return;
		}
	}
	if (i == MAX_CHALLENGES) {
		Netchan_OutOfBandPrint (net_from, "%c\nNo challenge for address.\n",
								A2C_PRINT);
		return;
	}

	s = Info_ValueForKey (userinfo, "*qf_version");
	if ((!s[0]) || sv_minqfversion->string[0]) {	// kick old clients?
		if (ver_compare (s, sv_minqfversion->string) < 0) {
			SV_Printf ("%s: Version %s is less than minimum version %s.\n",
						NET_AdrToString (net_from), s, sv_minqfversion->string);

			Netchan_OutOfBandPrint (net_from,
									"%c\nserver requires QuakeForge v%s or greater. Get it from http://www.quakeforge.net/\n",
									A2C_PRINT, sv_minqfversion->string);
			return;
		}
	}
	// check for password or spectator_password
	s = Info_ValueForKey (userinfo, "spectator");
	if (s[0] && strcmp (s, "0")) {
		if (spectator_password->string[0] &&
			!strcaseequal (spectator_password->string, "none") &&
			!strequal (spectator_password->string, s)) {	// failed
			SV_Printf ("%s: spectator password failed\n",
						NET_AdrToString (net_from));
			Netchan_OutOfBandPrint (net_from,
									"%c\nrequires a spectator password\n\n",
									A2C_PRINT);
			return;
		}
		Info_RemoveKey (userinfo, "spectator");	// remove passwd
		Info_SetValueForStarKey (userinfo, "*spectator", "1", MAX_INFO_STRING,
								 !sv_highchars->int_val);
		spectator = true;
	} else {
		s = Info_ValueForKey (userinfo, "password");
		if (password->string[0]
			&& !strcaseequal (password->string, "none")
			&& !strequal (password->string, s)) {
			SV_Printf ("%s:password failed\n", NET_AdrToString (net_from));
			Netchan_OutOfBandPrint (net_from,
									"%c\nserver requires a password\n\n",
									A2C_PRINT);
			return;
		}
		spectator = false;
		Info_RemoveKey (userinfo, "password");	// remove passwd
	}

	adr = net_from;
	userid++;							// so every client gets a unique id

	newcl = &temp;
	memset (newcl, 0, sizeof (client_t));

	newcl->userid = userid;

	// works properly
	if (!sv_highchars->int_val) {
		byte       *p, *q;

		for (p = (byte *) newcl->userinfo, q = (byte *) userinfo;
			 *q && p < (byte *) newcl->userinfo + sizeof (newcl->userinfo) - 1;
			 q++)
			if (*q > 31 && *q <= 127)
				*p++ = *q;
	} else
		strncpy (newcl->userinfo, userinfo, sizeof (newcl->userinfo) - 1);

	// if there is allready a slot for this ip, drop it
	for (i = 0, cl = svs.clients; i < MAX_CLIENTS; i++, cl++) {
		if (cl->state == cs_free)
			continue;
		if (NET_CompareBaseAdr (adr, cl->netchan.remote_address)
			&& (cl->netchan.qport == qport
				|| adr.port == cl->netchan.remote_address.port)) {
			if (cl->state == cs_connected) {
				SV_Printf ("%s:dup connect\n", NET_AdrToString (adr));
				userid--;
				return;
			}

			SV_Printf ("%s:reconnect\n", NET_AdrToString (adr));
			SV_DropClient (cl);
			break;
		}
	}

	// count up the clients and spectators
	clients = 0;
	spectators = 0;
	for (i = 0, cl = svs.clients; i < MAX_CLIENTS; i++, cl++) {
		if (cl->state == cs_free)
			continue;
		if (cl->spectator)
			spectators++;
		else
			clients++;
	}

	// if at server limits, refuse connection
	if (maxclients->int_val > MAX_CLIENTS)
		Cvar_SetValue (maxclients, MAX_CLIENTS);
	if (maxspectators->int_val > MAX_CLIENTS)
		Cvar_SetValue (maxspectators, MAX_CLIENTS);
	if (maxspectators->int_val + maxclients->int_val > MAX_CLIENTS)
		Cvar_SetValue (maxspectators, MAX_CLIENTS - maxclients->int_val);
	if ((spectator && spectators >= maxspectators->int_val)
		|| (!spectator && clients >= maxclients->int_val)) {
		SV_Printf ("%s:full connect\n", NET_AdrToString (adr));
		Netchan_OutOfBandPrint (adr, "%c\nserver is full\n\n", A2C_PRINT);
		return;
	}
	// find a client slot
	newcl = NULL;
	for (i = 0, cl = svs.clients; i < MAX_CLIENTS; i++, cl++) {
		if (cl->state == cs_free) {
			newcl = cl;
			break;
		}
	}
	if (!newcl) {
		SV_Printf ("WARNING: miscounted available clients\n");
		return;
	}
	// build a new connection
	// accept the new client
	// this is the only place a client_t is ever initialized
	*newcl = temp;

	Netchan_OutOfBandPrint (adr, "%c", S2C_CONNECTION);

	edictnum = (newcl - svs.clients) + 1;

	Netchan_Setup (&newcl->netchan, adr, qport);

	newcl->state = cs_connected;
	newcl->prespawned = false;
	newcl->spawned = false;
	svs.num_clients++;

	newcl->datagram.allowoverflow = true;
	newcl->datagram.data = newcl->datagram_buf;
	newcl->datagram.maxsize = sizeof (newcl->datagram_buf);

	// spectator mode can ONLY be set at join time
	newcl->spectator = spectator;

	ent = EDICT_NUM (&sv_pr_state, edictnum);
	newcl->edict = ent;

	// parse some info from the info strings
	SV_ExtractFromUserinfo (newcl);

	// JACK: Init the floodprot stuff.
	for (i = 0; i < 10; i++)
		newcl->whensaid[i] = 0.0;
	newcl->whensaidhead = 0;
	newcl->lockedtill = 0;

	// call the progs to get default spawn parms for the new client
	PR_ExecuteProgram (&sv_pr_state, sv_funcs.SetNewParms);
	for (i = 0; i < NUM_SPAWN_PARMS; i++)
		newcl->spawn_parms[i] = sv_globals.parms[i];

	if (newcl->spectator)
		SV_Printf ("Spectator %s connected\n", newcl->name);
	else
		Con_DPrintf ("Client %s connected\n", newcl->name);
	newcl->sendinfo = true;

	// QuakeForge stuff.
	newcl->msecs = 0;
	newcl->msec_cheating = 0;
	newcl->last_check = -1;

}

int
Rcon_Validate (cvar_t *pass)
{
	if (!strlen (pass->string))
		return 0;

	if (strcmp (Cmd_Argv (1), pass->string))
		return 0;

	return 1;
}

char *
Name_of_sender (void)
{
	int         i;
	client_t   *cl;

	for (i=0, cl=svs.clients ; i<MAX_CLIENTS ; i++,cl++) {
		if (cl->state == cs_free)
			continue;
		if (!NET_CompareBaseAdr(net_from, cl->netchan.remote_address))
			continue;
		if (cl->netchan.remote_address.port != net_from.port)
			continue;
		return cl->name;
	}
	return NULL;
}


/*
	SVC_RemoteCommand

	A client issued an rcon command.
	Shift down the remaining args
	Redirect all printfs
*/
void
SVC_RemoteCommand (void)
{
	int         i;
	int         len = 0;
	char        remaining[1024];
	char       *name;
	qboolean    do_cmd = false;
	qboolean    admin_cmd = false;

	if (CheckForFlood (FLOOD_RCON))
		return;

	if (Rcon_Validate (rcon_password)) {
		do_cmd = true;
	} else if (Rcon_Validate (admin_password)) {
		admin_cmd = true;
		if (strcmp(Cmd_Argv(2), "say") == 0
			||  strcmp(Cmd_Argv(2), "kick") == 0
			||  strcmp(Cmd_Argv(2), "ban") == 0
			||  strcmp(Cmd_Argv(2), "mute") == 0
			||  strcmp(Cmd_Argv(2), "cuff") == 0
			||  strcmp(Cmd_Argv(2), "exec") == 0
			||  strcmp(Cmd_Argv(2), "addip") == 0
			||  strcmp(Cmd_Argv(2), "listip") == 0
			||  strcmp(Cmd_Argv(2), "writeip") == 0
			||  strcmp(Cmd_Argv(2), "removeip") == 0)
			do_cmd = true;
	}
	if ((name = Name_of_sender())) {			// log issuer
		if (do_cmd && admin_cmd) {
			SV_BroadcastPrintf (PRINT_HIGH, "Admin %s issued %s command:\n",
								name, Cmd_Argv(2));
		} else if (admin_cmd) {
			SV_Printf ("Admin %s issued %s command:\n", name, Cmd_Argv(2));
		} else {
			SV_Printf("User %s %s rcon command:\n", name,
					   do_cmd? "issued":"attempted");
		}
	}
	
	if (do_cmd) {
		remaining[0] = 0;

		for (i = 2; i < Cmd_Argc (); i++) {
			strncat (remaining, Cmd_Argv (i), sizeof (remaining) - len - 1);
			strncat (remaining, " ", sizeof (remaining) - len - 2);
			len += strlen (Cmd_Argv (i)) + 1;	// +1 for " "
		}

		SV_Printf ("Rcon from %s:\n\trcon (hidden) %s\n",
					NET_AdrToString (net_from), remaining);

		SV_BeginRedirect (RD_PACKET);
		if (name)
			rcon_from_user = true;
		Cmd_ExecuteString (remaining, src_command);
		rcon_from_user = false;
	} else {
		SV_Printf ("Bad rcon from %s:\n%s\n", NET_AdrToString (net_from),
					net_message->message->data + 4);

		SV_BeginRedirect (RD_PACKET);
		if (admin_cmd) {
			SV_Printf("Command not valid with admin password.\n");
		} else {
			SV_Printf ("Bad rcon_password.\n");
		}
	}

	SV_EndRedirect ();
}


/*
	SV_ConnectionlessPacket

	A connectionless packet has four leading 0xff
	characters to distinguish it from a game channel.
	Clients that are in the game can still send
	connectionless packets.
*/
void
SV_ConnectionlessPacket (void)
{
	const char *s;
	const char *c;

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

	s = MSG_ReadStringLine (net_message);

	Cmd_TokenizeString (s);

	c = Cmd_Argv (0);

	if (!strcmp (c, "ping")
		|| (c[0] == A2A_PING && (c[1] == 0 || c[1] == '\n'))) {
		SVC_Ping ();
		return;
	}
	if (c[0] == A2A_ACK && (c[1] == 0 || c[1] == '\n')) {
		SV_Printf ("A2A_ACK from %s\n", NET_AdrToString (net_from));
		return;
	} else if (!strcmp (c, "status")) {
		SVC_Status ();
		return;
	} else if (!strcmp (c, "log")) {
		SVC_Log ();
		return;
	} else if (!strcmp (c, "connect")) {
		SVC_DirectConnect ();
		return;
	} else if (!strcmp (c, "getchallenge")) {
		SVC_GetChallenge ();
		return;
	} else if (!strcmp (c, "rcon"))
		SVC_RemoteCommand ();
	else
		SV_Printf ("bad connectionless packet from %s:\n%s\n",
					NET_AdrToString (net_from), s);
}

/*
	PACKET FILTERING


	You can add or remove addresses from the filter list with:

	addip <ip>
	removeip <ip>

	The ip address is specified in dot format, and any unspecified digits
	will match any value, so you can specify an entire class C network with
	"addip 192.246.40".

	Removeip will only remove an address specified exactly the same way.
	You cannot addip a subnet, then removeip a single host.

	listip
	Prints the current list of filters.

	writeip
	Dumps "addip <ip>" commands to listip.cfg so it can be execed at a
	later date.  The filter lists are not saved and restored by default,
	because I beleive it would cause too much confusion.

	filterban <0 or 1>

	If 1 (the default), then ip addresses matching the current list will be
	prohibited from entering the game.  This is the default setting.

	If 0, then only addresses matching the list will be allowed.  This lets
	you easily set up a private game, or a game that only allows players
	from your local network.
*/


typedef struct {
	unsigned int mask;
	unsigned int compare;
} ipfilter_t;

#define	MAX_IPFILTERS	1024

ipfilter_t  ipfilters[MAX_IPFILTERS];
int         numipfilters;

cvar_t     *filterban;

/*
	StringToFilter
*/
qboolean
StringToFilter (const char *s, ipfilter_t * f)
{
	char        num[128];
	int         i, j;
	byte        b[4];
	byte        m[4];

	for (i = 0; i < 4; i++) {
		b[i] = 0;
		m[i] = 0;
	}

	for (i = 0; i < 4; i++) {
		if (*s < '0' || *s > '9') {
			SV_Printf ("Bad filter address: %s\n", s);
			return false;
		}

		j = 0;
		while (*s >= '0' && *s <= '9') {
			num[j++] = *s++;
		}
		num[j] = 0;
		b[i] = atoi (num);
		if (b[i] != 0)
			m[i] = 255;

		if (!*s)
			break;
		s++;
	}

	f->mask = *(unsigned int *) m;
	f->compare = *(unsigned int *) b;

	return true;
}

/*
	SV_AddIP_f
*/
void
SV_AddIP_f (void)
{
	int         i;

	for (i = 0; i < numipfilters; i++)
		if (ipfilters[i].compare == 0xffffffff)
			break;						// free spot
	if (i == numipfilters) {
		if (numipfilters == MAX_IPFILTERS) {
			SV_Printf ("IP filter list is full\n");
			return;
		}
		numipfilters++;
	}

	if (!StringToFilter (Cmd_Argv (1), &ipfilters[i]))
		ipfilters[i].compare = 0xffffffff;
}

/*
	SV_RemoveIP_f
*/
void
SV_RemoveIP_f (void)
{
	ipfilter_t  f;
	int         i, j;

	if (!StringToFilter (Cmd_Argv (1), &f))
		return;
	for (i = 0; i < numipfilters; i++)
		if (ipfilters[i].mask == f.mask && ipfilters[i].compare == f.compare) {
			for (j = i + 1; j < numipfilters; j++)
				ipfilters[j - 1] = ipfilters[j];
			numipfilters--;
			SV_Printf ("Removed.\n");
			return;
		}
	SV_Printf ("Didn't find %s.\n", Cmd_Argv (1));
}

/*
	SV_ListIP_f
*/
void
SV_ListIP_f (void)
{
	int         i;
	byte        b[4];

	SV_Printf ("Filter list:\n");
	for (i = 0; i < numipfilters; i++) {
		*(unsigned int *) b = ipfilters[i].compare;
		SV_Printf ("%3i.%3i.%3i.%3i\n", b[0], b[1], b[2], b[3]);
	}
}

/*
	SV_WriteIP_f
*/
void
SV_WriteIP_f (void)
{
	VFile      *f;
	char        name[MAX_OSPATH];
	byte        b[4];
	int         i;

	snprintf (name, sizeof (name), "%s/listip.cfg", com_gamedir);

	SV_Printf ("Writing %s.\n", name);

	f = Qopen (name, "wb");
	if (!f) {
		SV_Printf ("Couldn't open %s\n", name);
		return;
	}

	for (i = 0; i < numipfilters; i++) {
		*(unsigned int *) b = ipfilters[i].compare;
		Qprintf (f, "addip %i.%i.%i.%i\n", b[0], b[1], b[2], b[3]);
	}

	Qclose (f);
}

/*
	netDoSexpire_f
*/
void
SV_netDoSexpire_f (void)
{
	int         arg1;
	int         i;

	if (Cmd_Argc () == 1) {
		SV_Printf ("Current DoS prot. expire settings: ");
		for (i = 0; i < DOSFLOODCMDS; i++)
			SV_Printf ("%f ", netdosexpire[i]);
		SV_Printf ("\n");
		if (!sv_netdosprotect->int_val)
			SV_Printf ("(disabled)\n");
		return;
	}

	if (Cmd_Argc () != DOSFLOODCMDS + 1) {
		SV_Printf
			("Usage: netdosexpire <ping> <log> <connect> <status> <rcon> <ban>\n");
		return;
	}

	for (i = 0; i < DOSFLOODCMDS; i++) {
		arg1 = atoi (Cmd_Argv (i + 1));
		if (arg1 > 0)
			netdosexpire[i] = arg1;
	}
	return;
}

/*
	DoSvalues_f
*/
void
SV_netDoSvalues_f (void)
{
	int         arg1;
	int         i;

	if (Cmd_Argc () == 1) {
		SV_Printf ("Current DoS prot. value settings: ");
		for (i = 0; i < DOSFLOODCMDS; i++)
			SV_Printf ("%f ", netdosvalues[i]);
		SV_Printf ("\n");
		if (!sv_netdosprotect->int_val)
			SV_Printf ("(disabled)\n");
		return;
	}

	if (Cmd_Argc () != DOSFLOODCMDS + 1) {
		SV_Printf
			("Usage: netdosvalues <ping> <log> <connect> <status> <rcon> <ban>\n");
		return;
	}

	for (i = 0; i < DOSFLOODCMDS; i++) {
		arg1 = atoi (Cmd_Argv (i + 1));
		if (arg1 > 0)
			netdosvalues[i] = arg1;
	}
	return;
}

/*
	SV_SendBan
*/
void
SV_SendBan (void)
{
	char        data[128];

	if (CheckForFlood (FLOOD_BAN))
		return;

	data[0] = data[1] = data[2] = data[3] = 0xff;
	data[4] = A2C_PRINT;
	data[5] = 0;
	strncat (data, "\nbanned.\n", sizeof (data) - strlen (data));

	NET_SendPacket (strlen (data), data, net_from);
}

/*
	SV_FilterPacket
*/
qboolean
SV_FilterPacket (void)
{
	int         i;
	unsigned int in;

	in = *(unsigned int *) net_from.ip;

	for (i = 0; i < numipfilters; i++)
		if ((in & ipfilters[i].mask) == ipfilters[i].compare)
			return filterban->int_val;

	return !filterban->int_val;			// FIXME eh?
}

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

/*
	SV_ReadPackets
*/
void
SV_ReadPackets (void)
{
	int         i;
	client_t   *cl;
	qboolean    good;
	int         qport;

	good = false;
	while (NET_GetPacket ()) {
		if (SV_FilterPacket ()) {
			SV_SendBan ();				// tell them we aren't listening...
			continue;
		}
		// check for connectionless packet (0xffffffff) first
		if (*(int *) net_message->message->data == -1) {
			SV_ConnectionlessPacket ();
			continue;
		}

		if (net_message->message->cursize < 11) {
			SV_Printf ("%s: Runt packet\n", NET_AdrToString (net_from));
			continue;
		}
		// read the qport out of the message so we can fix up
		// stupid address translating routers
		MSG_BeginReading (net_message);
		MSG_ReadLong (net_message);				// sequence number
		MSG_ReadLong (net_message);				// sequence number
		qport = MSG_ReadShort (net_message) & 0xffff;

		// check for packets from connected clients
		for (i = 0, cl = svs.clients; i < MAX_CLIENTS; i++, cl++) {
			if (cl->state == cs_free)
				continue;
			if (!NET_CompareBaseAdr (net_from, cl->netchan.remote_address))
				continue;
			if (cl->netchan.qport != qport)
				continue;
			if (cl->netchan.remote_address.port != net_from.port) {
				Con_DPrintf ("SV_ReadPackets: fixing up a translated port\n");
				cl->netchan.remote_address.port = net_from.port;
			}
			if (Netchan_Process (&cl->netchan)) {	// this is a valid,
				// sequenced packet, so
				// process it
				svs.stats.packets++;
				good = true;
				cl->send_message = true;	// reply at end of frame
				if (cl->state != cs_zombie)
					SV_ExecuteClientMessage (cl);
			}
			break;
		}

		if (i != MAX_CLIENTS)
			continue;

		// packet is not from a known client
		// SV_Printf ("%s:sequenced packet without connection\n"
		// ,NET_AdrToString(net_from));
	}
}

/*
	SV_CheckTimeouts

	If a packet has not been received from a client in timeout.value
	seconds, drop the conneciton.

	When a client is normally dropped, the client_t goes into a zombie
	state for a few seconds to make sure any final reliable message gets
	resent if necessary
*/
void
SV_CheckTimeouts (void)
{
	int         i;
	client_t   *cl;
	float       droptime;
	int         nclients;

	droptime = realtime - timeout->value;
	nclients = 0;

	for (i = 0, cl = svs.clients; i < MAX_CLIENTS; i++, cl++) {
		if (cl->state == cs_connected || cl->state == cs_spawned) {
			if (!cl->spectator)
				nclients++;
			if (cl->netchan.last_received < droptime) {
				SV_BroadcastPrintf (PRINT_HIGH, "%s timed out\n", cl->name);
				SV_DropClient (cl);
				cl->state = cs_free;	// don't bother with zombie state
				svs.num_clients--;
			}
		}
		if (cl->state == cs_zombie &&
			realtime - cl->connection_started > zombietime->value) {
			cl->state = cs_free;		// can now be reused
			svs.num_clients--;
		}
	}
	if (sv.paused && !nclients) {
		// nobody left, unpause the server
		SV_TogglePause ("Pause released since no players are left.\n");
	}
}

/*
	SV_GetConsoleCommands

	Add them exactly as if they had been typed at the console
*/
void
SV_GetConsoleCommands (void)
{
	Con_ProcessInput (0, 0); //XXX parms not used yet
}

/*
	SV_CheckVars
*/
void
SV_CheckVars (void)
{
	static char const *pw, *spw;
	int         v;

	if (password->string == pw && spectator_password->string == spw)
		return;
	pw = password->string;
	spw = spectator_password->string;

	v = 0;
	if (pw && pw[0] && strcmp (pw, "none"))
		v |= 1;
	if (spw && spw[0] && strcmp (spw, "none"))
		v |= 2;

	SV_Printf ("Updated needpass.\n");
	if (!v)
		Info_SetValueForKey (svs.info, "needpass", "", MAX_SERVERINFO_STRING,
							 !sv_highchars->int_val);
	else
		Info_SetValueForKey (svs.info, "needpass", va ("%i", v),
							 MAX_SERVERINFO_STRING, !sv_highchars->int_val);
}

/*
	SV_GarbageCollect

	Run string GC on progs every sv_gc frames
*/
void
SV_GarbageCollect ()
{
	if (sv_gc->int_val > 0)	{
		sv_gc_count++;
		if (sv_gc_count >= sv_gc->int_val) {
			sv_gc_count = 0;
			PR_GarbageCollect (&sv_pr_state);
		}
	} else { // Make sure the count gets reset if the gc is disabled.  I could use a callback, but I'm lazy
		sv_gc_count = 0;
	}
}

/*
	SV_Frame
*/
void
SV_Frame (float time)
{
	static double start, end;

	start = Sys_DoubleTime ();
	svs.stats.idle += start - end;

	// keep the random time dependent
	rand ();

	// decide the simulation time
	if (!sv.paused) {
		realtime += time;
		sv.time += time;
	}
	// check timeouts
	SV_CheckTimeouts ();

	// toggle the log buffer if full
	SV_CheckLog ();

	// move autonomous things around if enough time has passed
	if (!sv.paused)
		SV_Physics ();

	// get packets
	SV_ReadPackets ();

	// check for commands typed to the host
	SV_GetConsoleCommands ();

	// process console commands
	Cbuf_Execute ();

	SV_CheckVars ();

	// send messages back to the clients that had packets read this frame
	SV_SendClientMessages ();

	// send a heartbeat to the master if needed
	Master_Heartbeat ();

	SV_GarbageCollect ();

	// collect timing statistics
	end = Sys_DoubleTime ();
	svs.stats.active += end - start;
	if (++svs.stats.count == STATFRAMES) {
		svs.stats.latched_active = svs.stats.active;
		svs.stats.latched_idle = svs.stats.idle;
		svs.stats.latched_packets = svs.stats.packets;
		svs.stats.active = 0;
		svs.stats.idle = 0;
		svs.stats.packets = 0;
		svs.stats.count = 0;
	}
	Con_ProcessInput (0, 0);	//XXX evil hack to get the cursor in the right place
}

/*
	SV_InitLocal
*/
void
SV_InitLocal (void)
{
	int         i;
	extern cvar_t *sv_maxvelocity;
	extern cvar_t *sv_gravity;
	extern cvar_t *sv_aim;
	extern cvar_t *sv_stopspeed;
	extern cvar_t *sv_spectatormaxspeed;
	extern cvar_t *sv_accelerate;
	extern cvar_t *sv_airaccelerate;
	extern cvar_t *sv_wateraccelerate;
	extern cvar_t *sv_friction;
	extern cvar_t *sv_waterfriction;

	SV_UserInit ();

	rcon_password = Cvar_Get ("rcon_password", "", CVAR_NONE, NULL, "Set the password for rcon 'root' commands");
	admin_password = Cvar_Get ("admin_password", "", CVAR_NONE, NULL, "Set the password for rcon admin commands");
	password = Cvar_Get ("password", "", CVAR_NONE, NULL, "Set the server password for players");
	spectator_password = Cvar_Get ("spectator_password", "", CVAR_NONE, NULL, "Set the spectator password");

	sv_mintic = Cvar_Get ("sv_mintic", "0.03", CVAR_NONE, NULL, 
		"The minimum amount of time the server will wait before sending packets to a client. Set to .5 to make modem users happy");
	sv_maxtic = Cvar_Get ("sv_maxtic", "0.1", CVAR_NONE, NULL, 
		"The maximum amount of time in seconds before a client a receives an update from the server");
	fraglimit = Cvar_Get ("fraglimit", "0", CVAR_SERVERINFO, Cvar_Info, "Amount of frags a player must attain in order to exit the level");
	timelimit = Cvar_Get ("timelimit", "0", CVAR_SERVERINFO, Cvar_Info, 
		"Sets the amount of time in minutes that is needed before advancing to the next level");
	teamplay = Cvar_Get ("teamplay", "0", CVAR_SERVERINFO, Cvar_Info, 
		"Determines teamplay rules. 0 off, 1 You cannot hurt yourself nor your teammates, "
		"2 You can hurt yourself, your teammates, and you will lose one frag for killing a teammate"
		"3 You can hurt yourself but you cannot hurt your teammates");
	samelevel = Cvar_Get ("samelevel", "0", CVAR_SERVERINFO, Cvar_Info, 
		"Determines the rules for level changing and exiting. 0 Allows advancing to the next level,"
		"1 The same level will be played until someone exits,"
		"2 The same level will be played and the exit will kill anybody that tries to exit,"
		"3 The same level will be played and the exit will kill anybody that tries to exit, except on the Start map.");
	maxclients = Cvar_Get ("maxclients", "8", CVAR_SERVERINFO, Cvar_Info, 
		"Sets how many clients can connect to your server, this includes spectators and players");
	maxspectators = Cvar_Get ("maxspectators", "8", CVAR_SERVERINFO, Cvar_Info, 
		"Sets how many spectators can connect to your server. The maxclients value takes precidence over this value so this"
		" value should always be equal-to or less-then the maxclients value");
	hostname = Cvar_Get ("hostname", "unnamed", CVAR_SERVERINFO, Cvar_Info,
			"Report or sets the server name");
	deathmatch = Cvar_Get ("deathmatch", "1", CVAR_SERVERINFO, Cvar_Info, 
		"Sets the rules for weapon and item respawning. "
		"1 Does not leave weapons on the map. You can pickup weapons and items and they will respawn,"
		"2 Leaves weapons on the map. You can only pick up a weapon once. Picked up items will not respawn,"
		"3 Leaves weapons on the map. You can only pick up a weapon once. Picked up items will respawn.");
	spawn = Cvar_Get ("spawn", "0", CVAR_SERVERINFO, Cvar_Info,
			"Spawn the player entity");
	watervis = Cvar_Get ("watervis", "0", CVAR_SERVERINFO, Cvar_Info,
			"Toggle the use of r_watervis by OpenGL clients");

	timeout = Cvar_Get ("timeout", "65", CVAR_NONE, NULL, 
		"Sets the amount of time in seconds before a client is considered disconnected if the server does not receive a packet");
	zombietime = Cvar_Get ("zombietime", "2", CVAR_NONE, NULL, 
		"The number of seconds that the server will keep the character of a player on the map who seems to have disconnected");

	sv_maxvelocity = Cvar_Get ("sv_maxvelocity", "2000", CVAR_NONE, NULL,
			"Sets the maximum velocity an object can travel");
	sv_gravity = Cvar_Get ("sv_gravity", "800", CVAR_NONE, NULL,
			"Sets the global value for the amount of gravity");
	sv_stopspeed = Cvar_Get ("sv_stopspeed", "100", CVAR_NONE, NULL, 
		"Sets the value that determines how fast the player should come to a complete stop");
	sv_maxspeed = Cvar_Get ("sv_maxspeed", "320", CVAR_NONE, NULL,
			"Sets the maximum speed a player can move");
	sv_spectatormaxspeed =
		Cvar_Get ("sv_spectatormaxspeed", "500", CVAR_NONE, NULL,
				"Sets the maximum speed a spectator can move");
	sv_accelerate = Cvar_Get ("sv_accelerate", "10", CVAR_NONE, NULL,
			"Sets the acceleration value for the players");
	sv_airaccelerate = Cvar_Get ("sv_airaccelerate", "0.7", CVAR_NONE, NULL,
			"Sets how quickly the players accelerate in air");
	sv_wateraccelerate =
		Cvar_Get ("sv_wateraccelerate", "10", CVAR_NONE, NULL,
				"Sets the water acceleration value");
	sv_friction = Cvar_Get ("sv_friction", "4", CVAR_NONE, NULL,
			"Sets the friction value for the players");
	sv_waterfriction = Cvar_Get ("sv_waterfriction", "4", CVAR_NONE, NULL,
			"Sets the water friction value");

	sv_aim = Cvar_Get ("sv_aim", "2", CVAR_NONE, NULL,
			"Sets the value for auto-aiming leniency");

	sv_timekick =
		Cvar_Get ("sv_timekick", "3", CVAR_SERVERINFO, Cvar_Info,
				"Time cheat protection");
	sv_timekick_fuzz =
		Cvar_Get ("sv_timekick_fuzz", "15", CVAR_NONE, NULL,
				  "Time cheat \"fuzz factor\"");
	sv_timekick_interval =
		Cvar_Get ("sv_timekick_interval", "30", CVAR_NONE, NULL,
				  "Time cheat check interval");

	sv_minqfversion =
		Cvar_Get ("sv_minqfversion", "0", CVAR_SERVERINFO, Cvar_Info,
				  "Minimum QF version on client");

	sv_maxrate =
		Cvar_Get ("sv_maxrate", "0", CVAR_SERVERINFO, Cvar_Info,
				"Maximum allowable rate");

	sv_allow_log =
		Cvar_Get ("sv_allow_log", "1", CVAR_NONE, NULL, "Allow remote logging");
	sv_allow_status =
		Cvar_Get ("sv_allow_status", "1", CVAR_NONE, NULL,
				  "Allow remote status queries (qstat etc)");
	sv_allow_ping =
		Cvar_Get ("sv_allow_pings", "1", CVAR_NONE, NULL,
				  "Allow remote pings (qstat etc)");
	sv_netdosprotect =
		Cvar_Get ("sv_netdosprotect", "0", CVAR_NONE, NULL,
				  "DoS flood attack protection");

	sv_timestamps =
		Cvar_Get ("sv_timestamps", "0", CVAR_NONE, NULL,
				  "Time/date stamps in log entries");
	sv_timefmt =
		Cvar_Get ("sv_timefmt", "[%b %e %X] ", CVAR_NONE, NULL,
				  "Time/date format to use");

	filterban = Cvar_Get ("filterban", "1", CVAR_NONE, NULL, 
		"Determines the rules for the IP list "
		"0 Only IP addresses on the Ban list will be allowed onto the server, "
		"1 Only IP addresses NOT on the Ban list will be allowed onto the server");

	allow_download = Cvar_Get ("allow_download", "1", CVAR_NONE, NULL,
			"Toggle if clients can download game data from the server");
	allow_download_skins =
		Cvar_Get ("allow_download_skins", "1", CVAR_NONE, NULL,
				"Toggle if clients can download skins from the server");
	allow_download_models =
		Cvar_Get ("allow_download_models", "1", CVAR_NONE, NULL,
				"Toggle if clients can download models from the server");
	allow_download_sounds =
		Cvar_Get ("allow_download_sounds", "1", CVAR_NONE, NULL,
				"Toggle if clients can download sounds from the server");
	allow_download_maps =
		Cvar_Get ("allow_download_maps", "1", CVAR_NONE, NULL,
				"Toggle if clients can download maps from the server");

	sv_highchars = Cvar_Get ("sv_highchars", "1", CVAR_NONE, NULL,
			"Toggle the use of high character color names for players");

	sv_phs = Cvar_Get ("sv_phs", "1", CVAR_NONE, NULL,
	"Possibly Hearable Set. If set to zero, the server calculates sound hearability in realtime");
	 
	pausable = Cvar_Get ("pausable", "1", CVAR_NONE, NULL,
			"Toggle if server can be paused 1 is on, 0 is off");

	sv_gc = Cvar_Get ("sv_gc", "0", CVAR_NONE, NULL, "Number of frames to wait before running string GC.  0 disables.");

	// DoS protection
	Cmd_AddCommand ("netdosexpire", SV_netDoSexpire_f, "FIXME: part of DoS protection obviously, but I don't know what it does. No Description");
	Cmd_AddCommand ("netdosvalues", SV_netDoSvalues_f, "FIXME: part of DoS protection obviously, but I don't know what it does. No Description");

	Cmd_AddCommand ("addip", SV_AddIP_f, "Add a single IP or a domain of IPs to the IP list of the server.\n"
		"Useful for banning people. (addip (ipnumber))");
	Cmd_AddCommand ("removeip", SV_RemoveIP_f, "Remove an IP address from the server IP list. (removeip (ipnumber))");
	Cmd_AddCommand ("listip", SV_ListIP_f, "Print out the current list of IPs on the server list.");
	Cmd_AddCommand ("writeip", SV_WriteIP_f, "Record all IP addresses on the server IP list. The file name is listip.cfg");

	for (i = 0; i < MAX_MODELS; i++)
		snprintf (localmodels[i], sizeof (localmodels[i]), "*%i", i);

	Info_SetValueForStarKey (svs.info, "*version", QW_VERSION,
							 MAX_SERVERINFO_STRING, !sv_highchars->int_val);

	// Brand server as QF, with appropriate QSG standards version  --KB
	Info_SetValueForStarKey (svs.info, "*qf_version", VERSION,
							 MAX_SERVERINFO_STRING, !sv_highchars->int_val);
	Info_SetValueForStarKey (svs.info, "*qsg_version", QW_QSG_VERSION,
							 MAX_SERVERINFO_STRING, !sv_highchars->int_val);

	CF_Init ();

	// init fraglog stuff
	svs.logsequence = 1;
	svs.logtime = realtime;
	svs.log[0].data = svs.log_buf[0];
	svs.log[0].maxsize = sizeof (svs.log_buf[0]);
	svs.log[0].cursize = 0;
	svs.log[0].allowoverflow = true;
	svs.log[1].data = svs.log_buf[1];
	svs.log[1].maxsize = sizeof (svs.log_buf[1]);
	svs.log[1].cursize = 0;
	svs.log[1].allowoverflow = true;
}


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

/*
	Master_Heartbeat

	Send a message to the master every few minutes to
	let it know we are alive, and log information
*/
#define	HEARTBEAT_SECONDS	300
void
Master_Heartbeat (void)
{
	char        string[2048];
	int         active;
	int         i;

	if (realtime - svs.last_heartbeat < HEARTBEAT_SECONDS)
		return;							// not time to send yet

	svs.last_heartbeat = realtime;

	// 
	// count active users
	// 
	active = 0;
	for (i = 0; i < MAX_CLIENTS; i++)
		if (svs.clients[i].state == cs_connected ||
			svs.clients[i].state == cs_spawned) active++;

	svs.heartbeat_sequence++;
	snprintf (string, sizeof (string), "%c\n%i\n%i\n", S2M_HEARTBEAT,
			  svs.heartbeat_sequence, active);


	// send to group master
	for (i = 0; i < MAX_MASTERS; i++)
		if (master_adr[i].port) {
			SV_Printf ("Sending heartbeat to %s\n",
						NET_AdrToString (master_adr[i]));
			NET_SendPacket (strlen (string), string, master_adr[i]);
		}
}

/*
	Master_Shutdown

	Informs all masters that this server is going down
*/
void
Master_Shutdown (void)
{
	char        string[2048];
	int         i;

	snprintf (string, sizeof (string), "%c\n", S2M_SHUTDOWN);

	// send to group master
	for (i = 0; i < MAX_MASTERS; i++)
		if (master_adr[i].port) {
			SV_Printf ("Sending heartbeat to %s\n",
						NET_AdrToString (master_adr[i]));
			NET_SendPacket (strlen (string), string, master_adr[i]);
		}
}

/*
	SV_ExtractFromUserinfo

	Pull specific info from a newly changed userinfo string
	into a more C freindly form.
*/
void
SV_ExtractFromUserinfo (client_t *cl)
{
	const char *val;
	char       *q, *p;
	int         i;
	client_t   *client;
	int         dupc = 1;
	char        newname[80];


	// name for C code
	val = Info_ValueForKey (cl->userinfo, "name");

	// trim user name
	strncpy (newname, val, sizeof (newname) - 1);
	newname[sizeof (newname) - 1] = 0;

	for (p = newname; (*p == ' ' || *p == '\r' || *p == '\n') && *p; p++);

	if (p != newname && !*p) {
		// white space only
		strcpy (newname, "unnamed");
		p = newname;
	}

	if (p != newname && *p) {
		for (q = newname; *p; *q++ = *p++);
		*q = 0;
	}
	for (p = newname + strlen (newname) - 1;
		 p != newname && (*p == ' ' || *p == '\r' || *p == '\n'); p--);
	p[1] = 0;

	if (strcmp (val, newname)) {
		Info_SetValueForKey (cl->userinfo, "name", newname, MAX_INFO_STRING,
							 !sv_highchars->int_val);
		val = Info_ValueForKey (cl->userinfo, "name");
	}

	if (!val[0] || strcaseequal (val, "console")) {
		Info_SetValueForKey (cl->userinfo, "name", "unnamed", MAX_INFO_STRING,
							 !sv_highchars->int_val);
		val = Info_ValueForKey (cl->userinfo, "name");
	}
	// check to see if another user by the same name exists
	while (1) {
		for (i = 0, client = svs.clients; i < MAX_CLIENTS; i++, client++) {
			if (client->state != cs_spawned || client == cl)
				continue;
			if (strcaseequal (client->name, val))
				break;
		}
		if (i != MAX_CLIENTS) {			// dup name
			if (val[0] == '(') {
				if (val[2] == ')')
					val += 3;
				else if (val[3] == ')')
					val += 4;
			}

			snprintf (newname, sizeof (newname), "(%d)%-.40s", dupc++, val);
			Info_SetValueForKey (cl->userinfo, "name", newname,
								 MAX_INFO_STRING, !sv_highchars->int_val);
			val = Info_ValueForKey (cl->userinfo, "name");

			// If the new name was not set (due to the info string 
			// being too long), drop the client to prevent an infinite
			// loop.
			if(strcmp(val, newname)) {
				Netchan_OutOfBandPrint (net_from,
							"%c\nPlease choose a different name.\n", A2C_PRINT);
				SV_ClientPrintf (cl, PRINT_HIGH,
								 "Please choose a different name.\n");
				SV_Printf("Client %d kicked for invalid name\n", cl->userid);
				SV_DropClient (cl);
				return;
			}

		} else
			break;
	}

	if (strncmp (val, cl->name, strlen (cl->name))) {
		if (!sv.paused) {
			if (!cl->lastnametime || realtime - cl->lastnametime > 5) {
				cl->lastnamecount = 0;
				cl->lastnametime = realtime;
			} else if (cl->lastnamecount++ > 4) {
				SV_BroadcastPrintf (PRINT_HIGH, "%s was kicked for name spam\n",
									cl->name);
				SV_ClientPrintf (cl, PRINT_HIGH,
								 "You were kicked from the game for name spamming\n");
				SV_DropClient (cl);
				return;
			}
		}

		if (cl->state >= cs_spawned && !cl->spectator)
			SV_BroadcastPrintf (PRINT_HIGH, "%s changed name to %s\n", cl->name,
								val);
	}


	strncpy (cl->name, val, sizeof (cl->name) - 1);

	// rate command
	val = Info_ValueForKey (cl->userinfo, "rate");
	if (strlen (val)) {
		i = atoi (val);

		if ((sv_maxrate->int_val) && (i > sv_maxrate->int_val)) {
			i = bound (500, i, sv_maxrate->int_val);
		} else {
			i = bound (500, i, 10000);
		}
		cl->netchan.rate = 1.0 / i;
	}
	// msg command
	val = Info_ValueForKey (cl->userinfo, "msg");
	if (strlen (val)) {
		cl->messagelevel = atoi (val);
	}

	cl->stdver = atoi (Info_ValueForKey (cl->userinfo, "stdver"));
}


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

/*
	SV_InitNet
*/
void
SV_InitNet (void)
{
	int         port;
	int         p;

	port = PORT_SERVER;
	p = COM_CheckParm ("-port");
	if (p && p < com_argc) {
		port = atoi (com_argv[p + 1]);
		SV_Printf ("Port: %i\n", port);
	}
	NET_Init (port);

	Netchan_Init ();

	Net_Log_Init(sv.sound_precache);

	// heartbeats will always be sent to the id master
	svs.last_heartbeat = -99999;		// send immediately
//  NET_StringToAdr ("192.246.40.70:27000", &idmaster_adr);
}


/*
	SV_Init
*/
void
SV_Init (void)
{
	COM_InitArgv (host_parms.argc, (const char**)host_parms.argv);
	// COM_AddParm ("-game");
	// COM_AddParm ("qw");

	if (COM_CheckParm ("-minmemory"))
		host_parms.memsize = MINIMUM_MEMORY;

	if (host_parms.memsize < MINIMUM_MEMORY)
		SV_Error ("Only %4.1f megs of memory reported, can't execute game",
				  host_parms.memsize / (float) 0x100000);

	Cvar_Init_Hash ();
	Cmd_Init_Hash ();
	Memory_Init (host_parms.membase, host_parms.memsize);
	Cvar_Init ();
	Sys_Init_Cvars ();
	Sys_Init ();

	Cbuf_Init ();
	Cmd_Init ();
	SV_InitOperatorCommands ();

	// execute +set as early as possible
	Cmd_StuffCmds_f ();
	Cbuf_Execute_Sets ();

	// execute the global configuration file if it exists
	// would have been nice if Cmd_Exec_f could have been used, but it
	// only reads from within the quake file system, and changing that is
	// probably Not A Good Thing (tm).
	fs_globalcfg = Cvar_Get ("fs_globalcfg", FS_GLOBALCFG,
							 CVAR_ROM, 0, "global configuration file");
	Cmd_Exec_File (fs_globalcfg->string);
	Cbuf_Execute_Sets ();

	// execute +set again to override the config file
	Cmd_StuffCmds_f ();
	Cbuf_Execute_Sets ();

	fs_usercfg = Cvar_Get ("fs_usercfg", FS_USERCFG,
						   CVAR_ROM, 0, "user configuration file");
	Cmd_Exec_File (fs_usercfg->string);
	Cbuf_Execute_Sets ();

	// execute +set again to override the config file
	Cmd_StuffCmds_f ();
	Cbuf_Execute_Sets ();

	PI_Init ();

	Con_Init ("server");

	COM_Filesystem_Init_Cvars ();
	Game_Init_Cvars ();
	COM_Init_Cvars ();
	Mod_Init_Cvars ();
	Netchan_Init_Cvars ();
	Pmove_Init_Cvars ();
	SV_Progs_Init_Cvars ();
	PR_Init_Cvars ();

	// and now reprocess the cmdline's sets for overrides
	Cmd_StuffCmds_f ();
	Cbuf_Execute_Sets ();

	COM_Filesystem_Init ();
	Game_Init ();
	COM_Init ();

	PR_Init ();
	SV_Progs_Init ();
	Mod_Init ();

	SV_InitNet ();

	SV_InitLocal ();
	Pmove_Init ();

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

	Cbuf_InsertText ("exec server.cfg\n");

	host_initialized = true;

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

	SV_Printf ("\n");
	SV_Printf ("%s server, Version %s (build %04d)\n", PROGRAM, VERSION,
				build_number ());
	SV_Printf ("\n");

	SV_Printf ("<==> %s initialized <==>\n", PROGRAM);

	// process command line arguments
	Cmd_Exec_File (fs_usercfg->string);
	Cmd_StuffCmds_f ();
	Cbuf_Execute ();

	// if a map wasn't specified on the command line, spawn start.map
	if (sv.state == ss_dead)
		Cmd_ExecuteString ("map start", src_command);
	if (sv.state == ss_dead)
		SV_Error ("Could not initialize server");
}