sv_main.c

Go to the documentation of this file.

/*
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.
 
*/
 
#include "server.h"
 
netadr_t    master_adr[MAX_MASTERS];    // address of group servers
 
client_t    *sv_client;         // current client
 
cvar_t  *sv_paused;
cvar_t  *sv_timedemo;
 
cvar_t  *sv_enforcetime;
 
cvar_t  *msg_timeout;           // seconds without any message
cvar_t  *zombietime;            // seconds to sink messages after disconnect
 
cvar_t  *rcon_password;         // password for remote server commands
 
cvar_t  *allow_download;
cvar_t *allow_download_players;
cvar_t *allow_download_models;
cvar_t *allow_download_sounds;
cvar_t *allow_download_maps;
 
cvar_t *sv_airaccelerate;
 
cvar_t  *sv_noreload;           // don't reload level state when reentering
 
cvar_t  *maxclients;            // FIXME: rename sv_maxclients
cvar_t  *sv_showclamp;
 
cvar_t  *hostname;
cvar_t  *public_server;         // should heartbeats be sent
 
cvar_t  *sv_reconnect_limit;    // minimum seconds between connect messages
 
void Master_Shutdown (void);
 
 
//============================================================================
 
 
/*
=====================
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)
    {
        // call the prog function for removing a client
        // this will remove the body, among other things
        ge->ClientDisconnect (drop->edict);
    }
 
    if (drop->download)
    {
        FS_FreeFile (drop->download);
        drop->download = NULL;
    }
 
    drop->state = cs_zombie;        // become free in a few seconds
    drop->name[0] = 0;
}
 
 
 
/*
==============================================================================
 
CONNECTIONLESS COMMANDS
 
==============================================================================
*/
 
/*
===============
SV_StatusString
 
Builds the string that is sent as heartbeats and status replies
===============
*/
char    *SV_StatusString (void)
{
    char    player[1024];
    static char status[MAX_MSGLEN - 16];
    int     i;
    client_t    *cl;
    int     statusLength;
    int     playerLength;
 
    strcpy (status, Cvar_Serverinfo());
    strcat (status, "\n");
    statusLength = (int)strlen(status);
 
    for (i=0 ; i<maxclients->value ; i++)
    {
        cl = &svs.clients[i];
        if (cl->state == cs_connected || cl->state == cs_spawned )
        {
            Com_sprintf (player, sizeof(player), "%i %i \"%s\"\n", 
                cl->edict->client->ps.stats[STAT_FRAGS], cl->ping, cl->name);
            playerLength = (int)strlen(player);
            if (statusLength + playerLength >= sizeof(status) )
                break;      // can't hold any more
            strcpy (status + statusLength, player);
            statusLength += playerLength;
        }
    }
 
    return status;
}
 
/*
================
SVC_Status
 
Responds with all the info that qplug or qspy can see
================
*/
void SVC_Status (void)
{
    Netchan_OutOfBandPrint (NS_SERVER, net_from, "print\n%s", SV_StatusString());
#if 0
    Com_BeginRedirect (RD_PACKET, sv_outputbuf, SV_OUTPUTBUF_LENGTH, SV_FlushRedirect);
    Com_Printf (SV_StatusString());
    Com_EndRedirect ();
#endif
}
 
/*
================
SVC_Ack
 
================
*/
void SVC_Ack (void)
{
    Com_Printf ("Ping acknowledge from %s\n", NET_AdrToString(net_from));
}
 
/*
================
SVC_Info
 
Responds with short info for broadcast scans
The second parameter should be the current protocol version number.
================
*/
void SVC_Info (void)
{
    char    string[64];
    int     i, count;
    int     version;
 
    if (maxclients->value == 1)
        return;     // ignore in single player
 
    version = atoi (Cmd_Argv(1));
 
    if (version != PROTOCOL_VERSION)
        Com_sprintf (string, sizeof(string), "%s: wrong version\n", hostname->string, sizeof(string));
    else
    {
        count = 0;
        for (i=0 ; i<maxclients->value ; i++)
            if (svs.clients[i].state >= cs_connected)
                count++;
 
        Com_sprintf (string, sizeof(string), "%16s %8s %2i/%2i\n", hostname->string, sv.name, count, (int)maxclients->value);
    }
 
    Netchan_OutOfBandPrint (NS_SERVER, net_from, "info\n%s", string);
}
 
/*
================
SVC_Ping
 
Just responds with an acknowledgement
================
*/
void SVC_Ping (void)
{
    Netchan_OutOfBandPrint (NS_SERVER, net_from, "ack");
}
 
 
/*
=================
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() & 0x7fff;
        svs.challenges[oldest].adr = net_from;
        svs.challenges[oldest].time = curtime;
        i = oldest;
    }
 
    // send it back
    Netchan_OutOfBandPrint (NS_SERVER, net_from, "challenge %i", svs.challenges[i].challenge);
}
 
/*
==================
SVC_DirectConnect
 
A connection request that did not come from the master
==================
*/
void SVC_DirectConnect (void)
{
    char        userinfo[MAX_INFO_STRING];
    netadr_t    adr;
    int         i;
    client_t    *cl, *newcl;
    client_t    temp;
    edict_t     *ent;
    int         edictnum;
    int         version;
    int         qport;
    int         challenge;
 
    adr = net_from;
 
    Com_DPrintf ("SVC_DirectConnect ()\n");
 
    version = atoi(Cmd_Argv(1));
    if (version != PROTOCOL_VERSION)
    {
        Netchan_OutOfBandPrint (NS_SERVER, adr, "print\nServer is version %4.2f.\n", VERSION);
        Com_DPrintf ("    rejected connect from version %i\n", version);
        return;
    }
 
    qport = atoi(Cmd_Argv(2));
 
    challenge = atoi(Cmd_Argv(3));
 
    strncpy (userinfo, Cmd_Argv(4), sizeof(userinfo)-1);
    userinfo[sizeof(userinfo) - 1] = 0;
 
    // force the IP key/value pair so the game can filter based on ip
    Info_SetValueForKey (userinfo, "ip", NET_AdrToString(net_from));
 
    // attractloop servers are ONLY for local clients
    if (sv.attractloop)
    {
        if (!NET_IsLocalAddress (adr))
        {
            Com_Printf ("Remote connect in attract loop.  Ignored.\n");
            Netchan_OutOfBandPrint (NS_SERVER, adr, "print\nConnection refused.\n");
            return;
        }
    }
 
    // see if the challenge is valid
    if (!NET_IsLocalAddress (adr))
    {
        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 (NS_SERVER, adr, "print\nBad challenge.\n");
                return;
            }
        }
        if (i == MAX_CHALLENGES)
        {
            Netchan_OutOfBandPrint (NS_SERVER, adr, "print\nNo challenge for address.\n");
            return;
        }
    }
 
    newcl = &temp;
    memset (newcl, 0, sizeof(client_t));
 
    // if there is already a slot for this ip, reuse it
    for (i=0,cl=svs.clients ; i<maxclients->value ; 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 (!NET_IsLocalAddress (adr) && (svs.realtime - cl->lastconnect) < ((int)sv_reconnect_limit->value * 1000))
            {
                Com_DPrintf ("%s:reconnect rejected : too soon\n", NET_AdrToString (adr));
                return;
            }
            Com_Printf ("%s:reconnect\n", NET_AdrToString (adr));
            newcl = cl;
            goto gotnewcl;
        }
    }
 
    // find a client slot
    newcl = NULL;
    for (i=0,cl=svs.clients ; i<maxclients->value ; i++,cl++)
    {
        if (cl->state == cs_free)
        {
            newcl = cl;
            break;
        }
    }
    if (!newcl)
    {
        Netchan_OutOfBandPrint (NS_SERVER, adr, "print\nServer is full.\n");
        Com_DPrintf ("Rejected a connection.\n");
        return;
    }
 
gotnewcl:   
    // build a new connection
    // accept the new client
    // this is the only place a client_t is ever initialized
    *newcl = temp;
    sv_client = newcl;
    edictnum = (newcl-svs.clients)+1;
    ent = EDICT_NUM(edictnum);
    newcl->edict = ent;
    newcl->challenge = challenge; // save challenge for checksumming
 
    // get the game a chance to reject this connection or modify the userinfo
    if (!(ge->ClientConnect (ent, userinfo)))
    {
        if (*Info_ValueForKey (userinfo, "rejmsg")) 
            Netchan_OutOfBandPrint (NS_SERVER, adr, "print\n%s\nConnection refused.\n",  
                Info_ValueForKey (userinfo, "rejmsg"));
        else
            Netchan_OutOfBandPrint (NS_SERVER, adr, "print\nConnection refused.\n" );
        Com_DPrintf ("Game rejected a connection.\n");
        return;
    }
 
    // parse some info from the info strings
    strncpy (newcl->userinfo, userinfo, sizeof(newcl->userinfo)-1);
    SV_UserinfoChanged (newcl);
 
    // send the connect packet to the client
    Netchan_OutOfBandPrint (NS_SERVER, adr, "client_connect");
 
    Netchan_Setup (NS_SERVER, &newcl->netchan , adr, qport);
 
    newcl->state = cs_connected;
    
    SZ_Init (&newcl->datagram, newcl->datagram_buf, sizeof(newcl->datagram_buf) );
    newcl->datagram.allowoverflow = true;
    newcl->lastmessage = svs.realtime;  // don't timeout
    newcl->lastconnect = svs.realtime;
}
 
int Rcon_Validate (void)
{
    if (!strlen (rcon_password->string))
        return 0;
 
    if (strcmp (Cmd_Argv(1), rcon_password->string) )
        return 0;
 
    return 1;
}
 
/*
===============
SVC_RemoteCommand
 
A client issued an rcon command.
Shift down the remaining args
Redirect all printfs
===============
*/
void SVC_RemoteCommand (void)
{
    int     i;
    char    remaining[1024];
 
    i = Rcon_Validate ();
 
    if (i == 0)
        Com_Printf ("Bad rcon from %s:\n%s\n", NET_AdrToString (net_from), net_message.data+4);
    else
        Com_Printf ("Rcon from %s:\n%s\n", NET_AdrToString (net_from), net_message.data+4);
 
    Com_BeginRedirect (RD_PACKET, sv_outputbuf, SV_OUTPUTBUF_LENGTH, SV_FlushRedirect);
 
    if (!Rcon_Validate ())
    {
        Com_Printf ("Bad rcon_password.\n");
    }
    else
    {
        remaining[0] = 0;
 
        for (i=2 ; i<Cmd_Argc() ; i++)
        {
            strcat (remaining, Cmd_Argv(i) );
            strcat (remaining, " ");
        }
 
        Cmd_ExecuteString (remaining);
    }
 
    Com_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)
{
    char    *s;
    char    *c;
 
    MSG_BeginReading (&net_message);
    MSG_ReadLong (&net_message);        // skip the -1 marker
 
    s = MSG_ReadStringLine (&net_message);
 
    Cmd_TokenizeString (s, false);
 
    c = Cmd_Argv(0);
    Com_DPrintf ("Packet %s : %s\n", NET_AdrToString(net_from), c);
 
    if (!strcmp(c, "ping"))
        SVC_Ping ();
    else if (!strcmp(c, "ack"))
        SVC_Ack ();
    else if (!strcmp(c,"status"))
        SVC_Status ();
    else if (!strcmp(c,"info"))
        SVC_Info ();
    else if (!strcmp(c,"getchallenge"))
        SVC_GetChallenge ();
    else if (!strcmp(c,"connect"))
        SVC_DirectConnect ();
    else if (!strcmp(c, "rcon"))
        SVC_RemoteCommand ();
    else
        Com_Printf ("bad connectionless packet from %s:\n%s\n"
        , NET_AdrToString (net_from), s);
}
 
 
//============================================================================
 
/*
===================
SV_CalcPings
 
Updates the cl->ping variables
===================
*/
void SV_CalcPings (void)
{
    int         i, j;
    client_t    *cl;
    int         total, count;
 
    for (i=0 ; i<maxclients->value ; i++)
    {
        cl = &svs.clients[i];
        if (cl->state != cs_spawned )
            continue;
 
#if 0
        if (cl->lastframe > 0)
            cl->frame_latency[sv.framenum&(LATENCY_COUNTS-1)] = sv.framenum - cl->lastframe + 1;
        else
            cl->frame_latency[sv.framenum&(LATENCY_COUNTS-1)] = 0;
#endif
 
        total = 0;
        count = 0;
        for (j=0 ; j<LATENCY_COUNTS ; j++)
        {
            if (cl->frame_latency[j] > 0)
            {
                count++;
                total += cl->frame_latency[j];
            }
        }
        if (!count)
            cl->ping = 0;
        else
#if 0
            cl->ping = total*100/count - 100;
#else
            cl->ping = total / count;
#endif
 
        // let the game dll know about the ping
        cl->edict->client->ping = cl->ping;
    }
}
 
 
/*
===================
SV_GiveMsec
 
Every few frames, gives all clients an allotment of milliseconds
for their command moves.  If they exceed it, assume cheating.
===================
*/
void SV_GiveMsec (void)
{
    int         i;
    client_t    *cl;
 
    if (sv.framenum & 15)
        return;
 
    for (i=0 ; i<maxclients->value ; i++)
    {
        cl = &svs.clients[i];
        if (cl->state == cs_free )
            continue;
        
        cl->commandMsec = 1800;     // 1600 + some slop
    }
}
 
 
/*
=================
SV_ReadPackets
=================
*/
void SV_ReadPackets (void)
{
    int         i;
    client_t    *cl;
    int         qport;
 
    while (NET_GetPacket (NS_SERVER, &net_from, &net_message))
    {
        // check for connectionless packet (0xffffffff) first
        if (*(int *)net_message.data == -1)
        {
            SV_ConnectionlessPacket ();
            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<maxclients->value ; 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)
            {
                Com_Printf ("SV_ReadPackets: fixing up a translated port\n");
                cl->netchan.remote_address.port = net_from.port;
            }
 
            if (Netchan_Process(&cl->netchan, &net_message))
            {   // this is a valid, sequenced packet, so process it
                if (cl->state != cs_zombie)
                {
                    cl->lastmessage = svs.realtime; // don't timeout
                    SV_ExecuteClientMessage (cl);
                }
            }
            break;
        }
        
        if (i != maxclients->value)
            continue;
    }
}
 
/*
==================
SV_CheckTimeouts
 
If a packet has not been received from a client for timeout->value
seconds, drop the conneciton.  Server frames are used instead of
realtime to avoid dropping the local client while debugging.
 
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;
    int         droppoint;
    int         zombiepoint;
 
    droppoint = svs.realtime - 1000*msg_timeout->value;
    zombiepoint = svs.realtime - 1000*zombietime->value;
 
    for (i=0,cl=svs.clients ; i<maxclients->value ; i++,cl++)
    {
        // message times may be wrong across a changelevel
        if (cl->lastmessage > svs.realtime)
            cl->lastmessage = svs.realtime;
 
        if (cl->state == cs_zombie
        && cl->lastmessage < zombiepoint)
        {
            cl->state = cs_free;    // can now be reused
            continue;
        }
        if ( (cl->state == cs_connected || cl->state == cs_spawned) 
            && cl->lastmessage < droppoint)
        {
            SV_BroadcastPrintf (PRINT_HIGH, "%s timed out\n", cl->name);
            SV_DropClient (cl); 
            cl->state = cs_free;    // don't bother with zombie state
        }
    }
}
 
/*
================
SV_PrepWorldFrame
 
This has to be done before the world logic, because
player processing happens outside RunWorldFrame
================
*/
void SV_PrepWorldFrame (void)
{
    edict_t *ent;
    int     i;
 
    for (i=0 ; i<ge->num_edicts ; i++, ent++)
    {
        ent = EDICT_NUM(i);
        // events only last for a single message
        ent->s.event = 0;
    }
 
}
 
 
/*
=================
SV_RunGameFrame
=================
*/
void SV_RunGameFrame (void)
{
    if (host_speeds->value)
        time_before_game = Sys_Milliseconds ();
 
    // we always need to bump framenum, even if we
    // don't run the world, otherwise the delta
    // compression can get confused when a client
    // has the "current" frame
    sv.framenum++;
    sv.time = sv.framenum*100;
 
    // don't run if paused
    if (!sv_paused->value || maxclients->value > 1)
    {
        ge->RunFrame ();
 
        // never get more than one tic behind
        if (sv.time < svs.realtime)
        {
            if (sv_showclamp->value)
                Com_Printf ("sv highclamp\n");
            svs.realtime = sv.time;
        }
    }
 
    if (host_speeds->value)
        time_after_game = Sys_Milliseconds ();
 
}
 
/*
==================
SV_Frame
 
==================
*/
void SV_Frame (int msec)
{
    time_before_game = time_after_game = 0;
 
    // if server is not active, do nothing
    if (!svs.initialized)
        return;
 
    svs.realtime += msec;
 
    // keep the random time dependent
    rand ();
 
    // check timeouts
    SV_CheckTimeouts ();
 
    // get packets from clients
    SV_ReadPackets ();
 
    // move autonomous things around if enough time has passed
    if (!sv_timedemo->value && svs.realtime < sv.time)
    {
        // never let the time get too far off
        if (sv.time - svs.realtime > 100)
        {
            if (sv_showclamp->value)
                Com_Printf ("sv lowclamp\n");
            svs.realtime = sv.time - 100;
        }
        NET_Sleep(sv.time - svs.realtime);
        return;
    }
 
    // update ping based on the last known frame from all clients
    SV_CalcPings ();
 
    // give the clients some timeslices
    SV_GiveMsec ();
 
    // let everything in the world think and move
    SV_RunGameFrame ();
 
    // send messages back to the clients that had packets read this frame
    SV_SendClientMessages ();
 
    // save the entire world state if recording a serverdemo
    SV_RecordDemoMessage ();
 
    // send a heartbeat to the master if needed
    Master_Heartbeat ();
 
    // clear teleport flags, etc for next frame
    SV_PrepWorldFrame ();
 
}
 
//============================================================================
 
/*
================
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;
    int         i;
 
    // pgm post3.19 change, cvar pointer not validated before dereferencing
    if (!dedicated || !dedicated->value)
        return;     // only dedicated servers send heartbeats
 
    // pgm post3.19 change, cvar pointer not validated before dereferencing
    if (!public_server || !public_server->value)
        return;     // a private dedicated game
 
    // check for time wraparound
    if (svs.last_heartbeat > svs.realtime)
        svs.last_heartbeat = svs.realtime;
 
    if (svs.realtime - svs.last_heartbeat < HEARTBEAT_SECONDS*1000)
        return;     // not time to send yet
 
    svs.last_heartbeat = svs.realtime;
 
    // send the same string that we would give for a status OOB command
    string = SV_StatusString();
 
    // send to group master
    for (i=0 ; i<MAX_MASTERS ; i++)
        if (master_adr[i].port)
        {
            Com_Printf ("Sending heartbeat to %s\n", NET_AdrToString (master_adr[i]));
            Netchan_OutOfBandPrint (NS_SERVER, master_adr[i], "heartbeat\n%s", string);
        }
}
 
/*
=================
Master_Shutdown
 
Informs all masters that this server is going down
=================
*/
void Master_Shutdown (void)
{
    int         i;
 
    // pgm post3.19 change, cvar pointer not validated before dereferencing
    if (!dedicated || !dedicated->value)
        return;     // only dedicated servers send heartbeats
 
    // pgm post3.19 change, cvar pointer not validated before dereferencing
    if (!public_server || !public_server->value)
        return;     // a private dedicated game
 
    // send to group master
    for (i=0 ; i<MAX_MASTERS ; i++)
        if (master_adr[i].port)
        {
            if (i > 0)
                Com_Printf ("Sending heartbeat to %s\n", NET_AdrToString (master_adr[i]));
            Netchan_OutOfBandPrint (NS_SERVER, master_adr[i], "shutdown");
        }
}
 
//============================================================================
 
 
/*
=================
SV_UserinfoChanged
 
Pull specific info from a newly changed userinfo string
into a more C freindly form.
=================
*/
void SV_UserinfoChanged (client_t *cl)
{
    char    *val;
    int     i;
 
    // call prog code to allow overrides
    ge->ClientUserinfoChanged (cl->edict, cl->userinfo);
    
    // name for C code
    strncpy (cl->name, Info_ValueForKey (cl->userinfo, "name"), sizeof(cl->name)-1);
    // mask off high bit
    for (i=0 ; i<sizeof(cl->name) ; i++)
        cl->name[i] &= 127;
 
    // rate command
    val = Info_ValueForKey (cl->userinfo, "rate");
    if (strlen(val))
    {
        i = atoi(val);
        cl->rate = i;
        if (cl->rate < 100)
            cl->rate = 100;
        if (cl->rate > 15000)
            cl->rate = 15000;
    }
    else
        cl->rate = 5000;
 
    // msg command
    val = Info_ValueForKey (cl->userinfo, "msg");
    if (strlen(val))
    {
        cl->messagelevel = atoi(val);
    }
 
}
 
 
//============================================================================
 
/*
===============
SV_Init
 
Only called at quake2.exe startup, not for each game
===============
*/
void SV_Init (void)
{
    SV_InitOperatorCommands ();
 
    rcon_password = Cvar_Get ("rcon_password", "", 0);
    Cvar_Get ("skill", "1", 0);
    Cvar_Get ("deathmatch", "0", CVAR_LATCH);
    Cvar_Get ("coop", "0", CVAR_LATCH);
    Cvar_Get ("dmflags", va("%i", DF_INSTANT_ITEMS), CVAR_SERVERINFO);
    Cvar_Get ("fraglimit", "0", CVAR_SERVERINFO);
    Cvar_Get ("timelimit", "0", CVAR_SERVERINFO);
    Cvar_Get ("cheats", "0", CVAR_SERVERINFO|CVAR_LATCH);
    Cvar_Get ("protocol", va("%i", PROTOCOL_VERSION), CVAR_SERVERINFO|CVAR_NOSET);;
    maxclients = Cvar_Get ("maxclients", "1", CVAR_SERVERINFO | CVAR_LATCH);
    hostname = Cvar_Get ("hostname", "noname", CVAR_SERVERINFO | CVAR_ARCHIVE);
    msg_timeout = Cvar_Get ("timeout", "125", 0);
    zombietime = Cvar_Get ("zombietime", "2", 0);
    sv_showclamp = Cvar_Get ("showclamp", "0", 0);
    sv_paused = Cvar_Get ("paused", "0", 0);
    sv_timedemo = Cvar_Get ("timedemo", "0", 0);
    sv_enforcetime = Cvar_Get ("sv_enforcetime", "0", 0);
    allow_download = Cvar_Get ("allow_download", "1", CVAR_ARCHIVE);
    allow_download_players  = Cvar_Get ("allow_download_players", "0", CVAR_ARCHIVE);
    allow_download_models = Cvar_Get ("allow_download_models", "1", CVAR_ARCHIVE);
    allow_download_sounds = Cvar_Get ("allow_download_sounds", "1", CVAR_ARCHIVE);
    allow_download_maps   = Cvar_Get ("allow_download_maps", "1", CVAR_ARCHIVE);
 
    sv_noreload = Cvar_Get ("sv_noreload", "0", 0);
 
    sv_airaccelerate = Cvar_Get("sv_airaccelerate", "0", CVAR_LATCH);
 
    public_server = Cvar_Get ("public", "0", 0);
 
    sv_reconnect_limit = Cvar_Get ("sv_reconnect_limit", "3", CVAR_ARCHIVE);
 
    SZ_Init (&net_message, net_message_buffer, sizeof(net_message_buffer));
}
 
/*
==================
SV_FinalMessage
 
Used by SV_Shutdown 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 (char *message, qboolean reconnect)
{
    int         i;
    client_t    *cl;
    
    SZ_Clear (&net_message);
    MSG_WriteByte (&net_message, svc_print);
    MSG_WriteByte (&net_message, PRINT_HIGH);
    MSG_WriteString (&net_message, message);
 
    if (reconnect)
        MSG_WriteByte (&net_message, svc_reconnect);
    else
        MSG_WriteByte (&net_message, svc_disconnect);
 
    // send it twice
    // stagger the packets to crutch operating system limited buffers
 
    for (i=0, cl = svs.clients ; i<maxclients->value ; i++, cl++)
        if (cl->state >= cs_connected)
            Netchan_Transmit (&cl->netchan, net_message.cursize
            , net_message.data);
 
    for (i=0, cl = svs.clients ; i<maxclients->value ; i++, cl++)
        if (cl->state >= cs_connected)
            Netchan_Transmit (&cl->netchan, net_message.cursize
            , net_message.data);
}
 
 
 
/*
================
SV_Shutdown
 
Called when each game quits,
before Sys_Quit or Sys_Error
================
*/
void SV_Shutdown (char *finalmsg, qboolean reconnect)
{
    if (svs.clients)
        SV_FinalMessage (finalmsg, reconnect);
 
    Master_Shutdown ();
    // calling this function here causes function stack to be corrupted on 64 bit builds when invoked from Com_Error()
    //SV_ShutdownGameProgs ();
 
    // free current level
    if (sv.demofile)
        fclose (sv.demofile);
    memset (&sv, 0, sizeof(sv));
    Com_SetServerState (sv.state);
 
    // free server static data
    if (svs.clients)
        Z_Free (svs.clients);
    if (svs.client_entities)
        Z_Free (svs.client_entities);
    if (svs.demofile)
        fclose (svs.demofile);
    memset (&svs, 0, sizeof(svs));
}