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sv_client.cpp
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/*
===========================================================================
Copyright (C) 1999 - 2005, Id Software, Inc.
Copyright (C) 2000 - 2013, Raven Software, Inc.
Copyright (C) 2001 - 2013, Activision, Inc.
Copyright (C) 2005 - 2015, ioquake3 contributors
Copyright (C) 2013 - 2015, OpenJK contributors
This file is part of the OpenJK source code.
OpenJK is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License version 2 as
published by the Free Software Foundation.
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, see <http://www.gnu.org/licenses/>.
===========================================================================
*/
// sv_client.c -- server code for dealing with clients
#include "server.h"
#include "qcommon/stringed_ingame.h"
#ifdef USE_INTERNAL_ZLIB
#include "zlib/zlib.h"
#else
#include <zlib.h>
#endif
#include "server/sv_gameapi.h"
static void SV_CloseDownload( client_t *cl );
/*
=================
SV_GetChallenge
A "getchallenge" OOB command has been received
Returns a challenge number that can be used
in a subsequent connectResponse 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.
If we are authorizing, a challenge request will cause a packet
to be sent to the authorize server.
When an authorizeip is returned, a challenge response will be
sent to that ip.
ioquake3/openjk: we added a possibility for clients to add a challenge
to their packets, to make it more difficult for malicious servers
to hi-jack client connections.
=================
*/
void SV_GetChallenge( netadr_t from ) {
int i;
int oldest;
int oldestTime;
int oldestClientTime;
int clientChallenge;
challenge_t *challenge;
qboolean wasfound = qfalse;
// ignore if we are in single player
/*
if ( Cvar_VariableValue( "g_gametype" ) == GT_SINGLE_PLAYER || Cvar_VariableValue("ui_singlePlayerActive")) {
return;
}
*/
if (Cvar_VariableValue("ui_singlePlayerActive"))
{
return;
}
// Prevent using getchallenge as an amplifier
if ( SVC_RateLimitAddress( from, 10, 1000 ) ) {
Com_DPrintf( "SV_GetChallenge: rate limit from %s exceeded, dropping request\n",
NET_AdrToString( from ) );
return;
}
// Allow getchallenge to be DoSed relatively easily, but prevent
// excess outbound bandwidth usage when being flooded inbound
if ( SVC_RateLimit( &outboundLeakyBucket, 10, 100 ) ) {
Com_DPrintf( "SV_GetChallenge: rate limit exceeded, dropping request\n" );
return;
}
oldest = 0;
oldestClientTime = oldestTime = 0x7fffffff;
// see if we already have a challenge for this ip
challenge = &svs.challenges[0];
clientChallenge = atoi(Cmd_Argv(1));
for (i = 0 ; i < MAX_CHALLENGES ; i++, challenge++)
{
if(!challenge->connected && NET_CompareAdr(from, challenge->adr))
{
wasfound = qtrue;
if(challenge->time < oldestClientTime)
oldestClientTime = challenge->time;
}
if(wasfound && i >= MAX_CHALLENGES_MULTI)
{
i = MAX_CHALLENGES;
break;
}
if(challenge->time < oldestTime)
{
oldestTime = challenge->time;
oldest = i;
}
}
if (i == MAX_CHALLENGES) {
// this is the first time this client has asked for a challenge
challenge = &svs.challenges[oldest];
challenge->clientChallenge = clientChallenge;
challenge->adr = from;
challenge->firstTime = svs.time;
challenge->connected = qfalse;
}
// always generate a new challenge number, so the client cannot circumvent sv_maxping
challenge->challenge = ( (rand() << 16) ^ rand() ) ^ svs.time;
challenge->wasrefused = qfalse;
challenge->time = svs.time;
challenge->pingTime = svs.time;
NET_OutOfBandPrint( NS_SERVER, challenge->adr, "challengeResponse %i %i", challenge->challenge, clientChallenge );
}
/*
==================
SV_IsBanned
Check whether a certain address is banned
==================
*/
static qboolean SV_IsBanned( netadr_t *from, qboolean isexception )
{
int index;
serverBan_t *curban;
if ( !serverBansCount ) {
return qfalse;
}
if ( !isexception )
{
// If this is a query for a ban, first check whether the client is excepted
if ( SV_IsBanned( from, qtrue ) )
return qfalse;
}
for ( index = 0; index < serverBansCount; index++ )
{
curban = &serverBans[index];
if ( curban->isexception == isexception )
{
if ( NET_CompareBaseAdrMask( curban->ip, *from, curban->subnet ) )
return qtrue;
}
}
return qfalse;
}
/*
==================
SV_DirectConnect
A "connect" OOB command has been received
==================
*/
void SV_DirectConnect( netadr_t from ) {
char userinfo[MAX_INFO_STRING];
int i;
client_t *cl, *newcl;
client_t temp;
sharedEntity_t *ent;
int clientNum;
int version;
int qport;
int challenge;
char *password;
int startIndex;
char *denied;
int count;
char *ip;
Com_DPrintf ("SVC_DirectConnect ()\n");
// Check whether this client is banned.
if ( SV_IsBanned( &from, qfalse ) )
{
NET_OutOfBandPrint( NS_SERVER, from, "print\nYou are banned from this server.\n" );
Com_DPrintf( " rejected connect from %s (banned)\n", NET_AdrToString(from) );
return;
}
Q_strncpyz( userinfo, Cmd_Argv(1), sizeof(userinfo) );
version = atoi( Info_ValueForKey( userinfo, "protocol" ) );
if ( version != PROTOCOL_VERSION ) {
NET_OutOfBandPrint( NS_SERVER, from, "print\nServer uses protocol version %i (yours is %i).\n", PROTOCOL_VERSION, version );
Com_DPrintf (" rejected connect from version %i\n", version);
return;
}
challenge = atoi( Info_ValueForKey( userinfo, "challenge" ) );
qport = atoi( Info_ValueForKey( userinfo, "qport" ) );
// quick reject
for (i=0,cl=svs.clients ; i < sv_maxclients->integer ; i++,cl++) {
/* This was preventing sv_reconnectlimit from working. It seems like commenting this
out has solved the problem. HOwever, if there is a future problem then it could
be this.
if ( cl->state == CS_FREE ) {
continue;
}
*/
if ( NET_CompareBaseAdr( from, cl->netchan.remoteAddress )
&& ( cl->netchan.qport == qport
|| from.port == cl->netchan.remoteAddress.port ) ) {
if (( svs.time - cl->lastConnectTime)
< (sv_reconnectlimit->integer * 1000)) {
NET_OutOfBandPrint( NS_SERVER, from, "print\nReconnect rejected : too soon\n" );
Com_DPrintf ("%s:reconnect rejected : too soon\n", NET_AdrToString (from));
return;
}
break;
}
}
// don't let "ip" overflow userinfo string
if ( NET_IsLocalAddress (from) )
ip = "localhost";
else
ip = (char *)NET_AdrToString( from );
if( ( strlen( ip ) + strlen( userinfo ) + 4 ) >= MAX_INFO_STRING ) {
NET_OutOfBandPrint( NS_SERVER, from,
"print\nUserinfo string length exceeded. "
"Try removing setu cvars from your config.\n" );
return;
}
Info_SetValueForKey( userinfo, "ip", ip );
// see if the challenge is valid (LAN clients don't need to challenge)
if (!NET_IsLocalAddress(from))
{
int ping;
challenge_t *challengeptr;
for (i=0; i<MAX_CHALLENGES; i++)
{
if (NET_CompareAdr(from, svs.challenges[i].adr))
{
if(challenge == svs.challenges[i].challenge)
break;
}
}
if (i == MAX_CHALLENGES)
{
NET_OutOfBandPrint( NS_SERVER, from, "print\nNo or bad challenge for your address.\n" );
return;
}
challengeptr = &svs.challenges[i];
if(challengeptr->wasrefused)
{
// Return silently, so that error messages written by the server keep being displayed.
return;
}
ping = svs.time - challengeptr->pingTime;
// never reject a LAN client based on ping
if ( !Sys_IsLANAddress( from ) ) {
if ( sv_minPing->value && ping < sv_minPing->value ) {
NET_OutOfBandPrint( NS_SERVER, from, va("print\n%s\n", SE_GetString("MP_SVGAME", "SERVER_FOR_HIGH_PING")));//Server is for high pings only\n" );
Com_DPrintf (SE_GetString("MP_SVGAME", "CLIENT_REJECTED_LOW_PING"), i);//"Client %i rejected on a too low ping\n", i);
challengeptr->wasrefused = qtrue;
return;
}
if ( sv_maxPing->value && ping > sv_maxPing->value ) {
NET_OutOfBandPrint( NS_SERVER, from, va("print\n%s\n", SE_GetString("MP_SVGAME", "SERVER_FOR_LOW_PING")));//Server is for low pings only\n" );
Com_DPrintf (SE_GetString("MP_SVGAME", "CLIENT_REJECTED_HIGH_PING"), i);//"Client %i rejected on a too high ping\n", i);
challengeptr->wasrefused = qtrue;
return;
}
}
Com_Printf( SE_GetString("MP_SVGAME", "CLIENT_CONN_WITH_PING"), i, ping);//"Client %i connecting with %i challenge ping\n", i, ping );
challengeptr->connected = qtrue;
}
newcl = &temp;
Com_Memset (newcl, 0, sizeof(client_t));
// if there is already a slot for this ip, reuse it
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 )
&& ( cl->netchan.qport == qport
|| from.port == cl->netchan.remoteAddress.port ) ) {
Com_Printf ("%s:reconnect\n", NET_AdrToString (from));
newcl = cl;
// VVFIXME - both SOF2 and Wolf remove this call, claiming it blows away the user's info
// disconnect the client from the game first so any flags the
// player might have are dropped
GVM_ClientDisconnect( newcl - svs.clients );
//
goto gotnewcl;
}
}
// find a client slot
// if "sv_privateClients" is set > 0, then that number
// of client slots will be reserved for connections that
// have "password" set to the value of "sv_privatePassword"
// Info requests will report the maxclients as if the private
// slots didn't exist, to prevent people from trying to connect
// to a full server.
// This is to allow us to reserve a couple slots here on our
// servers so we can play without having to kick people.
// check for privateClient password
password = Info_ValueForKey( userinfo, "password" );
if ( !strcmp( password, sv_privatePassword->string ) ) {
startIndex = 0;
} else {
// skip past the reserved slots
startIndex = sv_privateClients->integer;
}
newcl = NULL;
for ( i = startIndex; i < sv_maxclients->integer ; i++ ) {
cl = &svs.clients[i];
if (cl->state == CS_FREE) {
newcl = cl;
break;
}
}
if ( !newcl ) {
if ( NET_IsLocalAddress( from ) ) {
count = 0;
for ( i = startIndex; i < sv_maxclients->integer ; i++ ) {
cl = &svs.clients[i];
if (cl->netchan.remoteAddress.type == NA_BOT) {
count++;
}
}
// if they're all bots
if (count >= sv_maxclients->integer - startIndex) {
SV_DropClient(&svs.clients[sv_maxclients->integer - 1], "only bots on server");
newcl = &svs.clients[sv_maxclients->integer - 1];
}
else {
Com_Error( ERR_FATAL, "server is full on local connect\n" );
return;
}
}
else {
const char *SV_GetStringEdString(char *refSection, char *refName);
NET_OutOfBandPrint( NS_SERVER, from, va("print\n%s\n", SV_GetStringEdString("MP_SVGAME","SERVER_IS_FULL")));
Com_DPrintf ("Rejected a connection.\n");
return;
}
}
// we got a newcl, so reset the reliableSequence and reliableAcknowledge
cl->reliableAcknowledge = 0;
cl->reliableSequence = 0;
gotnewcl:
// build a new connection
// accept the new client
// this is the only place a client_t is ever initialized
*newcl = temp;
clientNum = newcl - svs.clients;
ent = SV_GentityNum( clientNum );
newcl->gentity = ent;
// save the challenge
newcl->challenge = challenge;
// save the address
Netchan_Setup (NS_SERVER, &newcl->netchan , from, qport);
// save the userinfo
Q_strncpyz( newcl->userinfo, userinfo, sizeof(newcl->userinfo) );
// get the game a chance to reject this connection or modify the userinfo
denied = GVM_ClientConnect( clientNum, qtrue, qfalse ); // firstTime = qtrue
if ( denied ) {
NET_OutOfBandPrint( NS_SERVER, from, "print\n%s\n", denied );
Com_DPrintf ("Game rejected a connection: %s.\n", denied);
return;
}
SV_UserinfoChanged( newcl );
// send the connect packet to the client
NET_OutOfBandPrint( NS_SERVER, from, "connectResponse" );
Com_DPrintf( "Going from CS_FREE to CS_CONNECTED for %s\n", newcl->name );
newcl->state = CS_CONNECTED;
newcl->nextSnapshotTime = svs.time;
newcl->lastPacketTime = svs.time;
newcl->lastConnectTime = svs.time;
// when we receive the first packet from the client, we will
// notice that it is from a different serverid and that the
// gamestate message was not just sent, forcing a retransmit
newcl->gamestateMessageNum = -1;
newcl->lastUserInfoChange = 0; //reset the delay
newcl->lastUserInfoCount = 0; //reset the count
// if this was the first client on the server, or the last client
// the server can hold, send a heartbeat to the master.
count = 0;
for (i=0,cl=svs.clients ; i < sv_maxclients->integer ; i++,cl++) {
if ( svs.clients[i].state >= CS_CONNECTED ) {
count++;
}
}
if ( count == 1 || count == sv_maxclients->integer ) {
SV_Heartbeat_f();
}
}
/*
=====================
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 -- SV_FinalMessage() will handle that
=====================
*/
void SV_DropClient( client_t *drop, const char *reason ) {
int i;
challenge_t *challenge;
const bool isBot = drop->netchan.remoteAddress.type == NA_BOT;
if ( drop->state == CS_ZOMBIE ) {
return; // already dropped
}
if ( !isBot ) {
// see if we already have a challenge for this ip
challenge = &svs.challenges[0];
for (i = 0 ; i < MAX_CHALLENGES ; i++, challenge++)
{
if(NET_CompareAdr(drop->netchan.remoteAddress, challenge->adr))
{
Com_Memset(challenge, 0, sizeof(*challenge));
break;
}
}
}
// Kill any download
SV_CloseDownload( drop );
// tell everyone why they got dropped
SV_SendServerCommand( NULL, "print \"%s" S_COLOR_WHITE " %s\n\"", drop->name, reason );
// call the prog function for removing a client
// this will remove the body, among other things
GVM_ClientDisconnect( drop - svs.clients );
// add the disconnect command
SV_SendServerCommand( drop, "disconnect \"%s\"", reason );
if ( isBot ) {
SV_BotFreeClient( drop - svs.clients );
}
// nuke user info
SV_SetUserinfo( drop - svs.clients, "" );
if ( isBot ) {
// bots shouldn't go zombie, as there's no real net connection.
drop->state = CS_FREE;
} else {
Com_DPrintf( "Going to CS_ZOMBIE for %s\n", drop->name );
drop->state = CS_ZOMBIE; // become free in a few seconds
}
if ( drop->demo.demorecording ) {
SV_StopRecordDemo( drop );
}
// if this was the last client on the server, send a heartbeat
// to the master so it is known the server is empty
// send a heartbeat now so the master will get up to date info
// if there is already a slot for this ip, reuse it
for (i=0 ; i < sv_maxclients->integer ; i++ ) {
if ( svs.clients[i].state >= CS_CONNECTED ) {
break;
}
}
if ( i == sv_maxclients->integer ) {
SV_Heartbeat_f();
}
}
void SV_CreateClientGameStateMessage( client_t *client, msg_t *msg ) {
int start;
entityState_t *base, nullstate;
// NOTE, MRE: all server->client messages now acknowledge
// let the client know which reliable clientCommands we have received
MSG_WriteLong( msg, client->lastClientCommand );
// send any server commands waiting to be sent first.
// we have to do this cause we send the client->reliableSequence
// with a gamestate and it sets the clc.serverCommandSequence at
// the client side
SV_UpdateServerCommandsToClient( client, msg );
// send the gamestate
MSG_WriteByte( msg, svc_gamestate );
MSG_WriteLong( msg, client->reliableSequence );
// write the configstrings
for ( start = 0 ; start < MAX_CONFIGSTRINGS ; start++ ) {
if (sv.configstrings[start][0]) {
MSG_WriteByte( msg, svc_configstring );
MSG_WriteShort( msg, start );
MSG_WriteBigString( msg, sv.configstrings[start] );
}
}
// write the baselines
Com_Memset( &nullstate, 0, sizeof( nullstate ) );
for ( start = 0 ; start < MAX_GENTITIES; start++ ) {
base = &sv.svEntities[start].baseline;
if ( !base->number ) {
continue;
}
MSG_WriteByte( msg, svc_baseline );
MSG_WriteDeltaEntity( msg, &nullstate, base, qtrue );
}
MSG_WriteByte( msg, svc_EOF );
MSG_WriteLong( msg, client - svs.clients);
// write the checksum feed
MSG_WriteLong( msg, sv.checksumFeed);
// For old RMG system.
MSG_WriteShort ( msg, 0 );
}
/*
================
SV_SendClientGameState
Sends the first message from the server to a connected client.
This will be sent on the initial connection and upon each new map load.
It will be resent if the client acknowledges a later message but has
the wrong gamestate.
================
*/
void SV_SendClientGameState( client_t *client ) {
msg_t msg;
byte msgBuffer[MAX_MSGLEN];
MSG_Init( &msg, msgBuffer, sizeof( msgBuffer ) );
// MW - my attempt to fix illegible server message errors caused by
// packet fragmentation of initial snapshot.
while(client->state&&client->netchan.unsentFragments)
{
// send additional message fragments if the last message
// was too large to send at once
Com_Printf ("[ISM]SV_SendClientGameState() [2] for %s, writing out old fragments\n", client->name);
SV_Netchan_TransmitNextFragment(&client->netchan);
}
Com_DPrintf ("SV_SendClientGameState() for %s\n", client->name);
Com_DPrintf( "Going from CS_CONNECTED to CS_PRIMED for %s\n", client->name );
if ( client->state == CS_CONNECTED )
client->state = CS_PRIMED;
client->pureAuthentic = 0;
client->gotCP = qfalse;
// when we receive the first packet from the client, we will
// notice that it is from a different serverid and that the
// gamestate message was not just sent, forcing a retransmit
client->gamestateMessageNum = client->netchan.outgoingSequence;
SV_CreateClientGameStateMessage( client, &msg );
// deliver this to the client
SV_SendMessageToClient( &msg, client );
}
void SV_SendClientMapChange( client_t *client )
{
msg_t msg;
byte msgBuffer[MAX_MSGLEN];
MSG_Init( &msg, msgBuffer, sizeof( msgBuffer ) );
// NOTE, MRE: all server->client messages now acknowledge
// let the client know which reliable clientCommands we have received
MSG_WriteLong( &msg, client->lastClientCommand );
// send any server commands waiting to be sent first.
// we have to do this cause we send the client->reliableSequence
// with a gamestate and it sets the clc.serverCommandSequence at
// the client side
SV_UpdateServerCommandsToClient( client, &msg );
// send the gamestate
MSG_WriteByte( &msg, svc_mapchange );
// deliver this to the client
SV_SendMessageToClient( &msg, client );
}
/*
==================
SV_ClientEnterWorld
==================
*/
void SV_ClientEnterWorld( client_t *client, usercmd_t *cmd ) {
int clientNum;
sharedEntity_t *ent;
Com_DPrintf( "Going from CS_PRIMED to CS_ACTIVE for %s\n", client->name );
client->state = CS_ACTIVE;
// resend all configstrings using the cs commands since these are
// no longer sent when the client is CS_PRIMED
SV_UpdateConfigstrings( client );
// set up the entity for the client
clientNum = client - svs.clients;
ent = SV_GentityNum( clientNum );
ent->s.number = clientNum;
client->gentity = ent;
client->lastUserInfoChange = 0; //reset the delay
client->lastUserInfoCount = 0; //reset the count
client->deltaMessage = -1;
client->nextSnapshotTime = svs.time; // generate a snapshot immediately
if(cmd)
memcpy(&client->lastUsercmd, cmd, sizeof(client->lastUsercmd));
else
memset(&client->lastUsercmd, '\0', sizeof(client->lastUsercmd));
// call the game begin function
GVM_ClientBegin( client - svs.clients );
SV_BeginAutoRecordDemos();
}
/*
============================================================
CLIENT COMMAND EXECUTION
============================================================
*/
/*
==================
SV_CloseDownload
clear/free any download vars
==================
*/
static void SV_CloseDownload( client_t *cl ) {
int i;
// EOF
if (cl->download) {
FS_FCloseFile( cl->download );
}
cl->download = 0;
*cl->downloadName = 0;
// Free the temporary buffer space
for (i = 0; i < MAX_DOWNLOAD_WINDOW; i++) {
if (cl->downloadBlocks[i]) {
Z_Free( cl->downloadBlocks[i] );
cl->downloadBlocks[i] = NULL;
}
}
}
/*
==================
SV_StopDownload_f
Abort a download if in progress
==================
*/
static void SV_StopDownload_f( client_t *cl ) {
if ( cl->state == CS_ACTIVE )
return;
if (*cl->downloadName)
Com_DPrintf( "clientDownload: %d : file \"%s\" aborted\n", cl - svs.clients, cl->downloadName );
SV_CloseDownload( cl );
}
/*
==================
SV_DoneDownload_f
Downloads are finished
==================
*/
static void SV_DoneDownload_f( client_t *cl ) {
if ( cl->state == CS_ACTIVE )
return;
Com_DPrintf( "clientDownload: %s Done\n", cl->name);
// resend the game state to update any clients that entered during the download
SV_SendClientGameState(cl);
}
/*
==================
SV_NextDownload_f
The argument will be the last acknowledged block from the client, it should be
the same as cl->downloadClientBlock
==================
*/
static void SV_NextDownload_f( client_t *cl )
{
int block = atoi( Cmd_Argv(1) );
if ( cl->state == CS_ACTIVE )
return;
if (block == cl->downloadClientBlock) {
Com_DPrintf( "clientDownload: %d : client acknowledge of block %d\n", cl - svs.clients, block );
// Find out if we are done. A zero-length block indicates EOF
if (cl->downloadBlockSize[cl->downloadClientBlock % MAX_DOWNLOAD_WINDOW] == 0) {
Com_Printf( "clientDownload: %d : file \"%s\" completed\n", cl - svs.clients, cl->downloadName );
SV_CloseDownload( cl );
return;
}
cl->downloadSendTime = svs.time;
cl->downloadClientBlock++;
return;
}
// We aren't getting an acknowledge for the correct block, drop the client
// FIXME: this is bad... the client will never parse the disconnect message
// because the cgame isn't loaded yet
SV_DropClient( cl, "broken download" );
}
/*
==================
SV_BeginDownload_f
==================
*/
static void SV_BeginDownload_f( client_t *cl ) {
if ( cl->state == CS_ACTIVE )
return;
// Kill any existing download
SV_CloseDownload( cl );
// cl->downloadName is non-zero now, SV_WriteDownloadToClient will see this and open
// the file itself
Q_strncpyz( cl->downloadName, Cmd_Argv(1), sizeof(cl->downloadName) );
}
/*
==================
SV_WriteDownloadToClient
Check to see if the client wants a file, open it if needed and start pumping the client
Fill up msg with data
==================
*/
void SV_WriteDownloadToClient(client_t *cl, msg_t *msg)
{
int curindex;
int rate;
int blockspersnap;
int unreferenced = 1;
char errorMessage[1024];
char pakbuf[MAX_QPATH], *pakptr;
int numRefPaks;
if (!*cl->downloadName)
return; // Nothing being downloaded
if(!cl->download)
{
qboolean idPack = qfalse;
qboolean missionPack = qfalse;
// Chop off filename extension.
Com_sprintf(pakbuf, sizeof(pakbuf), "%s", cl->downloadName);
pakptr = strrchr(pakbuf, '.');
if(pakptr)
{
*pakptr = '\0';
// Check for pk3 filename extension
if(!Q_stricmp(pakptr + 1, "pk3"))
{
const char *referencedPaks = FS_ReferencedPakNames();
// Check whether the file appears in the list of referenced
// paks to prevent downloading of arbitrary files.
Cmd_TokenizeStringIgnoreQuotes(referencedPaks);
numRefPaks = Cmd_Argc();
for(curindex = 0; curindex < numRefPaks; curindex++)
{
if(!FS_FilenameCompare(Cmd_Argv(curindex), pakbuf))
{
unreferenced = 0;
// now that we know the file is referenced,
// check whether it's legal to download it.
missionPack = FS_idPak(pakbuf, "missionpack");
idPack = missionPack;
idPack = (qboolean)(idPack || FS_idPak(pakbuf, BASEGAME));
break;
}
}
}
}
cl->download = 0;
// We open the file here
if ( !sv_allowDownload->integer ||
idPack || unreferenced ||
( cl->downloadSize = FS_SV_FOpenFileRead( cl->downloadName, &cl->download ) ) < 0 ) {
// cannot auto-download file
if(unreferenced)
{
Com_Printf("clientDownload: %d : \"%s\" is not referenced and cannot be downloaded.\n", (int) (cl - svs.clients), cl->downloadName);
Com_sprintf(errorMessage, sizeof(errorMessage), "File \"%s\" is not referenced and cannot be downloaded.", cl->downloadName);
}
else if (idPack) {
Com_Printf("clientDownload: %d : \"%s\" cannot download id pk3 files\n", (int) (cl - svs.clients), cl->downloadName);
if(missionPack)
{
Com_sprintf(errorMessage, sizeof(errorMessage), "Cannot autodownload Team Arena file \"%s\"\n"
"The Team Arena mission pack can be found in your local game store.", cl->downloadName);
}
else
{
Com_sprintf(errorMessage, sizeof(errorMessage), "Cannot autodownload id pk3 file \"%s\"", cl->downloadName);
}
}
else if ( !sv_allowDownload->integer ) {
Com_Printf("clientDownload: %d : \"%s\" download disabled\n", (int) (cl - svs.clients), cl->downloadName);
if (sv_pure->integer) {
Com_sprintf(errorMessage, sizeof(errorMessage), "Could not download \"%s\" because autodownloading is disabled on the server.\n\n"
"You will need to get this file elsewhere before you "
"can connect to this pure server.\n", cl->downloadName);
} else {
Com_sprintf(errorMessage, sizeof(errorMessage), "Could not download \"%s\" because autodownloading is disabled on the server.\n\n"
"The server you are connecting to is not a pure server, "
"set autodownload to No in your settings and you might be "
"able to join the game anyway.\n", cl->downloadName);
}
} else {
// NOTE TTimo this is NOT supposed to happen unless bug in our filesystem scheme?
// if the pk3 is referenced, it must have been found somewhere in the filesystem
Com_Printf("clientDownload: %d : \"%s\" file not found on server\n", (int) (cl - svs.clients), cl->downloadName);
Com_sprintf(errorMessage, sizeof(errorMessage), "File \"%s\" not found on server for autodownloading.\n", cl->downloadName);
}
MSG_WriteByte( msg, svc_download );
MSG_WriteShort( msg, 0 ); // client is expecting block zero
MSG_WriteLong( msg, -1 ); // illegal file size
MSG_WriteString( msg, errorMessage );
*cl->downloadName = 0;
if(cl->download)
FS_FCloseFile(cl->download);
return;
}
Com_Printf( "clientDownload: %d : beginning \"%s\"\n", (int) (cl - svs.clients), cl->downloadName );
// Init
cl->downloadCurrentBlock = cl->downloadClientBlock = cl->downloadXmitBlock = 0;
cl->downloadCount = 0;
cl->downloadEOF = qfalse;
}
// Perform any reads that we need to
while (cl->downloadCurrentBlock - cl->downloadClientBlock < MAX_DOWNLOAD_WINDOW &&
cl->downloadSize != cl->downloadCount) {
curindex = (cl->downloadCurrentBlock % MAX_DOWNLOAD_WINDOW);
if (!cl->downloadBlocks[curindex])
cl->downloadBlocks[curindex] = (unsigned char *)Z_Malloc( MAX_DOWNLOAD_BLKSIZE, TAG_DOWNLOAD, qtrue );
cl->downloadBlockSize[curindex] = FS_Read( cl->downloadBlocks[curindex], MAX_DOWNLOAD_BLKSIZE, cl->download );
if (cl->downloadBlockSize[curindex] < 0) {
// EOF right now
cl->downloadCount = cl->downloadSize;
break;
}
cl->downloadCount += cl->downloadBlockSize[curindex];
// Load in next block
cl->downloadCurrentBlock++;
}
// Check to see if we have eof condition and add the EOF block
if (cl->downloadCount == cl->downloadSize &&
!cl->downloadEOF &&
cl->downloadCurrentBlock - cl->downloadClientBlock < MAX_DOWNLOAD_WINDOW) {
cl->downloadBlockSize[cl->downloadCurrentBlock % MAX_DOWNLOAD_WINDOW] = 0;
cl->downloadCurrentBlock++;
cl->downloadEOF = qtrue; // We have added the EOF block
}
// Loop up to window size times based on how many blocks we can fit in the
// client snapMsec and rate
// based on the rate, how many bytes can we fit in the snapMsec time of the client
// normal rate / snapshotMsec calculation
rate = cl->rate;
if ( sv_maxRate->integer ) {
if ( sv_maxRate->integer < 1000 ) {
Cvar_Set( "sv_MaxRate", "1000" );
}
if ( sv_maxRate->integer < rate ) {
rate = sv_maxRate->integer;
}
}
if (!rate) {
blockspersnap = 1;
} else {
blockspersnap = ( (rate * cl->snapshotMsec) / 1000 + MAX_DOWNLOAD_BLKSIZE ) /
MAX_DOWNLOAD_BLKSIZE;
}
if (blockspersnap < 0)
blockspersnap = 1;
while (blockspersnap--) {
// Write out the next section of the file, if we have already reached our window,