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sv_main.c
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sv_main.c
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/*
===========================================================================
Copyright (C) 1999-2005 Id Software, Inc.
This file is part of Quake III Arena source code.
Quake III Arena source code 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.
Quake III Arena source code 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 Quake III Arena source code; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
===========================================================================
*/
#include "server.h"
#ifdef USE_VOIP
cvar_t *sv_voip;
cvar_t *sv_voipProtocol;
#endif
serverStatic_t svs; // persistant server info
server_t sv; // local server
vm_t *gvm = NULL; // game virtual machine
cvar_t *sv_fps = NULL; // time rate for running non-clients
cvar_t *sv_timeout; // seconds without any message
cvar_t *sv_zombietime; // seconds to sink messages after disconnect
cvar_t *sv_rconPassword; // password for remote server commands
cvar_t *sv_privatePassword; // password for the privateClient slots
cvar_t *sv_allowDownload;
cvar_t *sv_maxclients;
cvar_t *sv_privateClients; // number of clients reserved for password
cvar_t *sv_hostname;
cvar_t *sv_master[MAX_MASTER_SERVERS]; // master server ip address
cvar_t *sv_reconnectlimit; // minimum seconds between connect messages
cvar_t *sv_showloss; // report when usercmds are lost
cvar_t *sv_padPackets; // add nop bytes to messages
cvar_t *sv_killserver; // menu system can set to 1 to shut server down
cvar_t *sv_mapname;
cvar_t *sv_mapChecksum;
cvar_t *sv_serverid;
cvar_t *sv_minRate;
cvar_t *sv_maxRate;
cvar_t *sv_dlRate;
cvar_t *sv_minPing;
cvar_t *sv_maxPing;
cvar_t *sv_gametype;
cvar_t *sv_pure;
cvar_t *sv_floodProtect;
cvar_t *sv_lanForceRate; // dedicated 1 (LAN) server forces local client rates to 99999 (bug #491)
#ifndef STANDALONE
cvar_t *sv_strictAuth;
#endif
cvar_t *sv_banFile;
serverBan_t serverBans[SERVER_MAXBANS];
int serverBansCount = 0;
/*
=============================================================================
EVENT MESSAGES
=============================================================================
*/
/*
===============
SV_ExpandNewlines
Converts newlines to "\n" so a line prints nicer
===============
*/
static char *SV_ExpandNewlines( char *in ) {
static char string[1024];
int l;
l = 0;
while ( *in && l < sizeof(string) - 3 ) {
if ( *in == '\n' ) {
string[l++] = '\\';
string[l++] = 'n';
} else {
string[l++] = *in;
}
in++;
}
string[l] = 0;
return string;
}
/*
======================
SV_ReplacePendingServerCommands
FIXME: This is ugly
======================
*/
#if 0 // unused
static int SV_ReplacePendingServerCommands( client_t *client, const char *cmd ) {
int i, index, csnum1, csnum2;
for ( i = client->reliableSent+1; i <= client->reliableSequence; i++ ) {
index = i & ( MAX_RELIABLE_COMMANDS - 1 );
//
if ( !Q_strncmp(cmd, client->reliableCommands[ index ], strlen("cs")) ) {
sscanf(cmd, "cs %i", &csnum1);
sscanf(client->reliableCommands[ index ], "cs %i", &csnum2);
if ( csnum1 == csnum2 ) {
Q_strncpyz( client->reliableCommands[ index ], cmd, sizeof( client->reliableCommands[ index ] ) );
/*
if ( client->netchan.remoteAddress.type != NA_BOT ) {
Com_Printf( "WARNING: client %i removed double pending config string %i: %s\n", client-svs.clients, csnum1, cmd );
}
*/
return qtrue;
}
}
}
return qfalse;
}
#endif
/*
======================
SV_AddServerCommand
The given command will be transmitted to the client, and is guaranteed to
not have future snapshot_t executed before it is executed
======================
*/
void SV_AddServerCommand( client_t *client, const char *cmd ) {
int index, i;
// this is very ugly but it's also a waste to for instance send multiple config string updates
// for the same config string index in one snapshot
// if ( SV_ReplacePendingServerCommands( client, cmd ) ) {
// return;
// }
// do not send commands until the gamestate has been sent
if( client->state < CS_PRIMED )
return;
client->reliableSequence++;
// if we would be losing an old command that hasn't been acknowledged,
// we must drop the connection
// we check == instead of >= so a broadcast print added by SV_DropClient()
// doesn't cause a recursive drop client
if ( client->reliableSequence - client->reliableAcknowledge == MAX_RELIABLE_COMMANDS + 1 ) {
Com_Printf( "===== pending server commands =====\n" );
for ( i = client->reliableAcknowledge + 1 ; i <= client->reliableSequence ; i++ ) {
Com_Printf( "cmd %5d: %s\n", i, client->reliableCommands[ i & (MAX_RELIABLE_COMMANDS-1) ] );
}
Com_Printf( "cmd %5d: %s\n", i, cmd );
SV_DropClient( client, "Server command overflow" );
return;
}
index = client->reliableSequence & ( MAX_RELIABLE_COMMANDS - 1 );
Q_strncpyz( client->reliableCommands[ index ], cmd, sizeof( client->reliableCommands[ index ] ) );
}
/*
=================
SV_SendServerCommand
Sends a reliable command string to be interpreted by
the client game module: "cp", "print", "chat", etc
A NULL client will broadcast to all clients
=================
*/
void QDECL SV_SendServerCommand(client_t *cl, const char *fmt, ...) {
va_list argptr;
byte message[MAX_MSGLEN];
client_t *client;
int j;
va_start (argptr,fmt);
Q_vsnprintf ((char *)message, sizeof(message), fmt,argptr);
va_end (argptr);
// Fix to http://aluigi.altervista.org/adv/q3msgboom-adv.txt
// The actual cause of the bug is probably further downstream
// and should maybe be addressed later, but this certainly
// fixes the problem for now
if ( strlen ((char *)message) > 1022 ) {
return;
}
if ( cl != NULL ) {
SV_AddServerCommand( cl, (char *)message );
return;
}
// hack to echo broadcast prints to console
if ( com_dedicated->integer && !strncmp( (char *)message, "print", 5) ) {
Com_Printf ("broadcast: %s\n", SV_ExpandNewlines((char *)message) );
}
// send the data to all relevent clients
for (j = 0, client = svs.clients; j < sv_maxclients->integer ; j++, client++) {
SV_AddServerCommand( client, (char *)message );
}
}
/*
==============================================================================
MASTER SERVER FUNCTIONS
==============================================================================
*/
/*
================
SV_MasterHeartbeat
Send a message to the masters every few minutes to
let it know we are alive, and log information.
We will also have a heartbeat sent when a server
changes from empty to non-empty, and full to non-full,
but not on every player enter or exit.
================
*/
#define HEARTBEAT_MSEC 300*1000
#define MASTERDNS_MSEC 24*60*60*1000
void SV_MasterHeartbeat(const char *message)
{
static netadr_t adr[MAX_MASTER_SERVERS][2]; // [2] for v4 and v6 address for the same address string.
int i;
int res;
int netenabled;
#ifdef ELITEFORCE
qboolean dpmasterProtocol;
#endif
netenabled = Cvar_VariableIntegerValue("net_enabled");
// "dedicated 1" is for lan play, "dedicated 2" is for inet public play
if (!com_dedicated || com_dedicated->integer != 2 || !(netenabled & (NET_ENABLEV4 | NET_ENABLEV6)))
return; // only dedicated servers send heartbeats
// if not time yet, don't send anything
if ( svs.time < svs.nextHeartbeatTime )
return;
#ifdef ELITEFORCE
if ( !Q_stricmp( com_gamename->string, LEGACY_MASTER_GAMENAME ) ) {
message = LEGACY_HEARTBEAT_FOR_MASTER;
dpmasterProtocol = qfalse;
} else {
dpmasterProtocol = qtrue;
}
#else
if ( !Q_stricmp( com_gamename->string, LEGACY_MASTER_GAMENAME ) )
message = LEGACY_HEARTBEAT_FOR_MASTER;
#endif
svs.nextHeartbeatTime = svs.time + HEARTBEAT_MSEC;
// send to group masters
for (i = 0; i < MAX_MASTER_SERVERS; i++)
{
if(!sv_master[i]->string[0])
continue;
// see if we haven't already resolved the name or if it's been over 24 hours
// resolving usually causes hitches on win95, so only do it when needed
if (sv_master[i]->modified || svs.time > svs.masterResolveTime[i])
{
sv_master[i]->modified = qfalse;
svs.masterResolveTime[i] = svs.time + MASTERDNS_MSEC;
if(netenabled & NET_ENABLEV4)
{
Com_Printf("Resolving %s (IPv4)\n", sv_master[i]->string);
res = NET_StringToAdr(sv_master[i]->string, &adr[i][0], NA_IP);
if(res == 2)
{
// if no port was specified, use the default master port
adr[i][0].port = BigShort(PORT_MASTER);
}
if(res)
Com_Printf( "%s resolved to %s\n", sv_master[i]->string, NET_AdrToStringwPort(adr[i][0]));
else
Com_Printf( "%s has no IPv4 address.\n", sv_master[i]->string);
}
if(netenabled & NET_ENABLEV6)
{
Com_Printf("Resolving %s (IPv6)\n", sv_master[i]->string);
res = NET_StringToAdr(sv_master[i]->string, &adr[i][1], NA_IP6);
if(res == 2)
{
// if no port was specified, use the default master port
adr[i][1].port = BigShort(PORT_MASTER);
}
if(res)
Com_Printf( "%s resolved to %s\n", sv_master[i]->string, NET_AdrToStringwPort(adr[i][1]));
else
Com_Printf( "%s has no IPv6 address.\n", sv_master[i]->string);
}
}
if(adr[i][0].type == NA_BAD && adr[i][1].type == NA_BAD)
{
continue;
}
Com_Printf ("Sending heartbeat to %s\n", sv_master[i]->string );
// this command should be changed if the server info / status format
// ever incompatably changes
#ifdef ELITEFORCE
if ( !dpmasterProtocol ) {
if(adr[i][0].type != NA_BAD)
NET_OutOfBandPrint(NS_SERVER, adr[i][0], "\\heartbeat\\%d\\gamename\\%s\\",
Cvar_VariableIntegerValue("net_port"), message);
if(adr[i][1].type != NA_BAD)
NET_OutOfBandPrint(NS_SERVER, adr[i][1], "\\heartbeat\\%d\\gamename\\%s\\",
Cvar_VariableIntegerValue("net_port6"), message);
continue;
}
#endif
if(adr[i][0].type != NA_BAD)
NET_OutOfBandPrint( NS_SERVER, adr[i][0], "heartbeat %s\n", message);
if(adr[i][1].type != NA_BAD)
NET_OutOfBandPrint( NS_SERVER, adr[i][1], "heartbeat %s\n", message);
}
}
/*
=================
SV_MasterShutdown
Informs all masters that this server is going down
=================
*/
void SV_MasterShutdown( void ) {
// send a heartbeat right now
svs.nextHeartbeatTime = -9999;
SV_MasterHeartbeat(HEARTBEAT_FOR_MASTER);
// send it again to minimize chance of drops
svs.nextHeartbeatTime = -9999;
SV_MasterHeartbeat(HEARTBEAT_FOR_MASTER);
// when the master tries to poll the server, it won't respond, so
// it will be removed from the list
}
/*
==============================================================================
CONNECTIONLESS COMMANDS
==============================================================================
*/
// This is deliberately quite large to make it more of an effort to DoS
#define MAX_BUCKETS 16384
#define MAX_HASHES 1024
static leakyBucket_t buckets[ MAX_BUCKETS ];
static leakyBucket_t *bucketHashes[ MAX_HASHES ];
leakyBucket_t outboundLeakyBucket;
/*
================
SVC_HashForAddress
================
*/
static long SVC_HashForAddress( netadr_t address ) {
byte *ip = NULL;
size_t size = 0;
int i;
long hash = 0;
switch ( address.type ) {
case NA_IP: ip = address.ip; size = 4; break;
case NA_IP6: ip = address.ip6; size = 16; break;
default: break;
}
for ( i = 0; i < size; i++ ) {
hash += (long)( ip[ i ] ) * ( i + 119 );
}
hash = ( hash ^ ( hash >> 10 ) ^ ( hash >> 20 ) );
hash &= ( MAX_HASHES - 1 );
return hash;
}
/*
================
SVC_BucketForAddress
Find or allocate a bucket for an address
================
*/
static leakyBucket_t *SVC_BucketForAddress( netadr_t address, int burst, int period ) {
leakyBucket_t *bucket = NULL;
int i;
long hash = SVC_HashForAddress( address );
int now = Sys_Milliseconds();
for ( bucket = bucketHashes[ hash ]; bucket; bucket = bucket->next ) {
switch ( bucket->type ) {
case NA_IP:
if ( memcmp( bucket->ipv._4, address.ip, 4 ) == 0 ) {
return bucket;
}
break;
case NA_IP6:
if ( memcmp( bucket->ipv._6, address.ip6, 16 ) == 0 ) {
return bucket;
}
break;
default:
break;
}
}
for ( i = 0; i < MAX_BUCKETS; i++ ) {
int interval;
bucket = &buckets[ i ];
interval = now - bucket->lastTime;
// Reclaim expired buckets
if ( bucket->lastTime > 0 && ( interval > ( burst * period ) ||
interval < 0 ) ) {
if ( bucket->prev != NULL ) {
bucket->prev->next = bucket->next;
} else {
bucketHashes[ bucket->hash ] = bucket->next;
}
if ( bucket->next != NULL ) {
bucket->next->prev = bucket->prev;
}
Com_Memset( bucket, 0, sizeof( leakyBucket_t ) );
}
if ( bucket->type == NA_BAD ) {
bucket->type = address.type;
switch ( address.type ) {
case NA_IP: Com_Memcpy( bucket->ipv._4, address.ip, 4 ); break;
case NA_IP6: Com_Memcpy( bucket->ipv._6, address.ip6, 16 ); break;
default: break;
}
bucket->lastTime = now;
bucket->burst = 0;
bucket->hash = hash;
// Add to the head of the relevant hash chain
bucket->next = bucketHashes[ hash ];
if ( bucketHashes[ hash ] != NULL ) {
bucketHashes[ hash ]->prev = bucket;
}
bucket->prev = NULL;
bucketHashes[ hash ] = bucket;
return bucket;
}
}
// Couldn't allocate a bucket for this address
return NULL;
}
/*
================
SVC_RateLimit
================
*/
qboolean SVC_RateLimit( leakyBucket_t *bucket, int burst, int period ) {
if ( bucket != NULL ) {
int now = Sys_Milliseconds();
int interval = now - bucket->lastTime;
int expired = interval / period;
int expiredRemainder = interval % period;
if ( expired > bucket->burst || interval < 0 ) {
bucket->burst = 0;
bucket->lastTime = now;
} else {
bucket->burst -= expired;
bucket->lastTime = now - expiredRemainder;
}
if ( bucket->burst < burst ) {
bucket->burst++;
return qfalse;
}
}
return qtrue;
}
/*
================
SVC_RateLimitAddress
Rate limit for a particular address
================
*/
qboolean SVC_RateLimitAddress( netadr_t from, int burst, int period ) {
leakyBucket_t *bucket = SVC_BucketForAddress( from, burst, period );
return SVC_RateLimit( bucket, burst, period );
}
/*
================
SVC_Status
Responds with all the info that qplug or qspy can see about the server
and all connected players. Used for getting detailed information after
the simple info query.
================
*/
static void SVC_Status( netadr_t from ) {
char player[1024];
char status[MAX_MSGLEN];
int i;
client_t *cl;
playerState_t *ps;
int statusLength;
int playerLength;
char infostring[MAX_INFO_STRING];
// ignore if we are in single player
if ( Cvar_VariableValue( "g_gametype" ) == GT_SINGLE_PLAYER || Cvar_VariableValue("ui_singlePlayerActive")) {
return;
}
// Prevent using getstatus as an amplifier
if ( SVC_RateLimitAddress( from, 10, 1000 ) ) {
Com_DPrintf( "SVC_Status: rate limit from %s exceeded, dropping request\n",
NET_AdrToString( from ) );
return;
}
// Allow getstatus to be DoSed relatively easily, but prevent
// excess outbound bandwidth usage when being flooded inbound
if ( SVC_RateLimit( &outboundLeakyBucket, 10, 100 ) ) {
Com_DPrintf( "SVC_Status: rate limit exceeded, dropping request\n" );
return;
}
// A maximum challenge length of 128 should be more than plenty.
if(strlen(Cmd_Argv(1)) > 128)
return;
strcpy( infostring, Cvar_InfoString( CVAR_SERVERINFO ) );
// echo back the parameter to status. so master servers can use it as a challenge
// to prevent timed spoofed reply packets that add ghost servers
Info_SetValueForKey( infostring, "challenge", Cmd_Argv(1) );
status[0] = 0;
statusLength = 0;
for (i=0 ; i < sv_maxclients->integer ; i++) {
cl = &svs.clients[i];
if ( cl->state >= CS_CONNECTED ) {
ps = SV_GameClientNum( i );
Com_sprintf (player, sizeof(player), "%i %i \"%s\"\n",
ps->persistant[PERS_SCORE], cl->ping, cl->name);
playerLength = strlen(player);
if (statusLength + playerLength >= sizeof(status) ) {
break; // can't hold any more
}
strcpy (status + statusLength, player);
statusLength += playerLength;
}
}
NET_OutOfBandPrint( NS_SERVER, from, "statusResponse\n%s\n%s", infostring, status );
}
/*
================
SVC_Info
Responds with a short info message that should be enough to determine
if a user is interested in a server to do a full status
================
*/
void SVC_Info( netadr_t from ) {
int i, count, humans;
char *gamedir;
char infostring[MAX_INFO_STRING];
// ignore if we are in single player
if ( Cvar_VariableValue( "g_gametype" ) == GT_SINGLE_PLAYER || Cvar_VariableValue("ui_singlePlayerActive")) {
return;
}
// Prevent using getinfo as an amplifier
if ( SVC_RateLimitAddress( from, 10, 1000 ) ) {
Com_DPrintf( "SVC_Info: rate limit from %s exceeded, dropping request\n",
NET_AdrToString( from ) );
return;
}
// Allow getinfo to be DoSed relatively easily, but prevent
// excess outbound bandwidth usage when being flooded inbound
if ( SVC_RateLimit( &outboundLeakyBucket, 10, 100 ) ) {
Com_DPrintf( "SVC_Info: rate limit exceeded, dropping request\n" );
return;
}
/*
* Check whether Cmd_Argv(1) has a sane length. This was not done in the original Quake3 version which led
* to the Infostring bug discovered by Luigi Auriemma. See http://aluigi.altervista.org/ for the advisory.
*/
// A maximum challenge length of 128 should be more than plenty.
if(strlen(Cmd_Argv(1)) > 128)
return;
// don't count privateclients
count = humans = 0;
for ( i = sv_privateClients->integer ; i < sv_maxclients->integer ; i++ ) {
if ( svs.clients[i].state >= CS_CONNECTED ) {
count++;
if (svs.clients[i].netchan.remoteAddress.type != NA_BOT) {
humans++;
}
}
}
infostring[0] = 0;
// echo back the parameter to status. so servers can use it as a challenge
// to prevent timed spoofed reply packets that add ghost servers
Info_SetValueForKey( infostring, "challenge", Cmd_Argv(1) );
Info_SetValueForKey( infostring, "gamename", com_gamename->string );
#ifdef LEGACY_PROTOCOL
if(com_legacyprotocol->integer > 0)
Info_SetValueForKey(infostring, "protocol", va("%i", com_legacyprotocol->integer));
else
#endif
Info_SetValueForKey(infostring, "protocol", va("%i", com_protocol->integer));
Info_SetValueForKey( infostring, "hostname", sv_hostname->string );
Info_SetValueForKey( infostring, "mapname", sv_mapname->string );
Info_SetValueForKey( infostring, "clients", va("%i", count) );
Info_SetValueForKey(infostring, "g_humanplayers", va("%i", humans));
Info_SetValueForKey( infostring, "sv_maxclients",
va("%i", sv_maxclients->integer - sv_privateClients->integer ) );
Info_SetValueForKey( infostring, "gametype", va("%i", sv_gametype->integer ) );
Info_SetValueForKey( infostring, "pure", va("%i", sv_pure->integer ) );
Info_SetValueForKey(infostring, "g_needpass", va("%d", Cvar_VariableIntegerValue("g_needpass")));
#ifdef USE_VOIP
if (sv_voipProtocol->string && *sv_voipProtocol->string) {
Info_SetValueForKey( infostring, "voip", sv_voipProtocol->string );
}
#endif
if( sv_minPing->integer ) {
Info_SetValueForKey( infostring, "minPing", va("%i", sv_minPing->integer) );
}
if( sv_maxPing->integer ) {
Info_SetValueForKey( infostring, "maxPing", va("%i", sv_maxPing->integer) );
}
gamedir = Cvar_VariableString( "fs_game" );
if( *gamedir ) {
Info_SetValueForKey( infostring, "game", gamedir );
}
#ifdef ELITEFORCE
NET_OutOfBandPrint( NS_SERVER, from, "infoResponse \"%s\"", infostring );
#else
NET_OutOfBandPrint( NS_SERVER, from, "infoResponse\n%s", infostring );
#endif
}
/*
================
SVC_FlushRedirect
================
*/
static void SV_FlushRedirect( char *outputbuf ) {
NET_OutOfBandPrint( NS_SERVER, svs.redirectAddress, "print\n%s", outputbuf );
}
/*
===============
SVC_RemoteCommand
An rcon packet arrived from the network.
Shift down the remaining args
Redirect all printfs
===============
*/
static void SVC_RemoteCommand( netadr_t from, msg_t *msg ) {
qboolean valid;
char remaining[1024];
// TTimo - scaled down to accumulate, but not overflow anything network wise, print wise etc.
// (OOB messages are the bottleneck here)
#define SV_OUTPUTBUF_LENGTH (1024 - 16)
char sv_outputbuf[SV_OUTPUTBUF_LENGTH];
char *cmd_aux;
// Prevent using rcon as an amplifier and make dictionary attacks impractical
if ( SVC_RateLimitAddress( from, 10, 1000 ) ) {
Com_DPrintf( "SVC_RemoteCommand: rate limit from %s exceeded, dropping request\n",
NET_AdrToString( from ) );
return;
}
if ( !strlen( sv_rconPassword->string ) ||
strcmp (Cmd_Argv(1), sv_rconPassword->string) ) {
static leakyBucket_t bucket;
// Make DoS via rcon impractical
if ( SVC_RateLimit( &bucket, 10, 1000 ) ) {
Com_DPrintf( "SVC_RemoteCommand: rate limit exceeded, dropping request\n" );
return;
}
valid = qfalse;
Com_Printf ("Bad rcon from %s: %s\n", NET_AdrToString (from), Cmd_ArgsFrom(2) );
} else {
valid = qtrue;
Com_Printf ("Rcon from %s: %s\n", NET_AdrToString (from), Cmd_ArgsFrom(2) );
}
// start redirecting all print outputs to the packet
svs.redirectAddress = from;
Com_BeginRedirect (sv_outputbuf, SV_OUTPUTBUF_LENGTH, SV_FlushRedirect);
if ( !strlen( sv_rconPassword->string ) ) {
Com_Printf ("No rconpassword set on the server.\n");
} else if ( !valid ) {
Com_Printf ("Bad rconpassword.\n");
} else {
remaining[0] = 0;
// https://zerowing.idsoftware.com/bugzilla/show_bug.cgi?id=543
// get the command directly, "rcon <pass> <command>" to avoid quoting issues
// extract the command by walking
// since the cmd formatting can fuckup (amount of spaces), using a dumb step by step parsing
cmd_aux = Cmd_Cmd();
cmd_aux+=4;
while(cmd_aux[0]==' ')
cmd_aux++;
while(cmd_aux[0] && cmd_aux[0]!=' ') // password
cmd_aux++;
while(cmd_aux[0]==' ')
cmd_aux++;
Q_strcat( remaining, sizeof(remaining), cmd_aux);
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.
=================
*/
static void SV_ConnectionlessPacket( netadr_t from, msg_t *msg ) {
char *s;
char *c;
MSG_BeginReadingOOB( msg );
MSG_ReadLong( msg ); // skip the -1 marker
#ifndef ELITEFORCE
if (!Q_strncmp("connect", (char *) &msg->data[4], 7)) {
Huff_Decompress(msg, 12);
}
#endif
s = MSG_ReadStringLine( msg );
Cmd_TokenizeString( s );
c = Cmd_Argv(0);
Com_DPrintf ("SV packet %s : %s\n", NET_AdrToString(from), c);
if (!Q_stricmp(c, "getstatus")) {
SVC_Status( from );
} else if (!Q_stricmp(c, "getinfo")) {
SVC_Info( from );
} else if (!Q_stricmp(c, "getchallenge")) {
SV_GetChallenge(from);
} else if (!Q_stricmp(c, "connect")) {
SV_DirectConnect( from );
#ifndef STANDALONE
} else if (!Q_stricmp(c, "ipAuthorize")) {
SV_AuthorizeIpPacket( from );
#endif
} else if (!Q_stricmp(c, "rcon")) {
SVC_RemoteCommand( from, msg );
} else if (!Q_stricmp(c, "disconnect")) {
// if a client starts up a local server, we may see some spurious
// server disconnect messages when their new server sees our final
// sequenced messages to the old client
} else {
Com_DPrintf ("bad connectionless packet from %s:\n%s\n",
NET_AdrToString (from), s);
}
}
//============================================================================
/*
=================
SV_PacketEvent
=================
*/
void SV_PacketEvent( netadr_t from, msg_t *msg ) {
int i;
client_t *cl;
int qport;
// check for connectionless packet (0xffffffff) first
if ( msg->cursize >= 4 && *(int *)msg->data == -1) {
SV_ConnectionlessPacket( from, msg );
return;
}
// read the qport out of the message so we can fix up
// stupid address translating routers
MSG_BeginReadingOOB( msg );
MSG_ReadLong( msg ); // sequence number
qport = MSG_ReadShort( msg ) & 0xffff;
// find which client the message is from
for (i=0, cl=svs.clients ; i < sv_maxclients->integer ; i++,cl++) {
if (cl->state == CS_FREE) {
continue;
}
if ( !NET_CompareBaseAdr( from, cl->netchan.remoteAddress ) ) {
continue;
}
// it is possible to have multiple clients from a single IP
// address, so they are differentiated by the qport variable
if (cl->netchan.qport != qport) {
continue;
}
// the IP port can't be used to differentiate them, because
// some address translating routers periodically change UDP
// port assignments
if (cl->netchan.remoteAddress.port != from.port) {
Com_Printf( "SV_PacketEvent: fixing up a translated port\n" );
cl->netchan.remoteAddress.port = from.port;
}
#ifdef ELITEFORCE
msg->compat = cl->compat;
#endif
// make sure it is a valid, in sequence packet
if (SV_Netchan_Process(cl, msg)) {
// zombie clients still need to do the Netchan_Process
// to make sure they don't need to retransmit the final
// reliable message, but they don't do any other processing
if (cl->state != CS_ZOMBIE) {
cl->lastPacketTime = svs.time; // don't timeout
SV_ExecuteClientMessage( cl, msg );
}
}
return;
}
}
/*
===================
SV_CalcPings
Updates the cl->ping variables
===================
*/
static void SV_CalcPings( void ) {
int i, j;
client_t *cl;
int total, count;
int delta;
playerState_t *ps;
for (i=0 ; i < sv_maxclients->integer ; i++) {
cl = &svs.clients[i];
if ( cl->state != CS_ACTIVE ) {
cl->ping = 999;
continue;
}
if ( !cl->gentity ) {
cl->ping = 999;
continue;
}
if ( cl->gentity->r.svFlags & SVF_BOT ) {
cl->ping = 0;
continue;
}
total = 0;
count = 0;
for ( j = 0 ; j < PACKET_BACKUP ; j++ ) {
if ( cl->frames[j].messageAcked <= 0 ) {
continue;
}
delta = cl->frames[j].messageAcked - cl->frames[j].messageSent;
count++;
total += delta;
}
if (!count) {
cl->ping = 999;
} else {
cl->ping = total/count;
if ( cl->ping > 999 ) {
cl->ping = 999;
}
}
// let the game dll know about the ping
ps = SV_GameClientNum( i );
ps->ping = cl->ping;
}
}
/*
==================
SV_CheckTimeouts
If a packet has not been received from a client for timeout->integer
seconds, drop the conneciton. Server time is 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
==================
*/
static void SV_CheckTimeouts( void ) {
int i;
client_t *cl;
int droppoint;
int zombiepoint;
droppoint = svs.time - 1000 * sv_timeout->integer;
zombiepoint = svs.time - 1000 * sv_zombietime->integer;
for (i=0,cl=svs.clients ; i < sv_maxclients->integer ; i++,cl++) {
// message times may be wrong across a changelevel
if (cl->lastPacketTime > svs.time) {
cl->lastPacketTime = svs.time;
}
if (cl->state == CS_ZOMBIE
&& cl->lastPacketTime < zombiepoint) {
// using the client id cause the cl->name is empty at this point
Com_DPrintf( "Going from CS_ZOMBIE to CS_FREE for client %d\n", i );