mirror of
https://github.com/DrBeef/ioq3quest.git
synced 2024-12-02 17:02:16 +00:00
8ab3f7af8d
Previously, a legacy client wouldn't get a VoIP packet, but if they did, they'd panic and disconnect. Now they ignore them and continue on. This also gives us the framework to add other features legacy clients can ignore. Oh, this also has the benefit of allowing us to store incoming VoIP for playback in recorded demos. They'll play the chatter on VoIP clients, and be ignored on legacy ones. Huge win.
1934 lines
54 KiB
C
1934 lines
54 KiB
C
/*
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===========================================================================
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Copyright (C) 1999-2005 Id Software, Inc.
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This file is part of Quake III Arena source code.
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Quake III Arena source code is free software; you can redistribute it
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and/or modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the License,
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or (at your option) any later version.
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Quake III Arena source code is distributed in the hope that it will be
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useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Quake III Arena source code; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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===========================================================================
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*/
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// sv_client.c -- server code for dealing with clients
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#include "server.h"
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static void SV_CloseDownload( client_t *cl );
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/*
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=================
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SV_GetChallenge
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A "getchallenge" OOB command has been received
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Returns a challenge number that can be used
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in a subsequent connectResponse command.
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We do this to prevent denial of service attacks that
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flood the server with invalid connection IPs. With a
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challenge, they must give a valid IP address.
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If we are authorizing, a challenge request will cause a packet
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to be sent to the authorize server.
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When an authorizeip is returned, a challenge response will be
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sent to that ip.
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=================
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*/
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void SV_GetChallenge( netadr_t from ) {
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int i;
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int oldest;
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int oldestTime;
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challenge_t *challenge;
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// ignore if we are in single player
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if ( Cvar_VariableValue( "g_gametype" ) == GT_SINGLE_PLAYER || Cvar_VariableValue("ui_singlePlayerActive")) {
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return;
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}
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oldest = 0;
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oldestTime = 0x7fffffff;
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// see if we already have a challenge for this ip
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challenge = &svs.challenges[0];
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for (i = 0 ; i < MAX_CHALLENGES ; i++, challenge++) {
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if ( !challenge->connected && NET_CompareAdr( from, challenge->adr ) ) {
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break;
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}
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if ( challenge->time < oldestTime ) {
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oldestTime = challenge->time;
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oldest = i;
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}
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}
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if (i == MAX_CHALLENGES) {
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// this is the first time this client has asked for a challenge
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challenge = &svs.challenges[oldest];
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challenge->challenge = ( (rand() << 16) ^ rand() ) ^ svs.time;
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challenge->adr = from;
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challenge->firstTime = svs.time;
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challenge->time = svs.time;
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challenge->connected = qfalse;
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i = oldest;
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}
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#ifdef STANDALONE
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if(Cvar_VariableIntegerValue("com_standalone"))
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{
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challenge->pingTime = svs.time;
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NET_OutOfBandPrint( NS_SERVER, from, "challengeResponse %i", challenge->challenge );
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}
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#else
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// if they are on a lan address, send the challengeResponse immediately
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if ( Sys_IsLANAddress( from ) ) {
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challenge->pingTime = svs.time;
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NET_OutOfBandPrint( NS_SERVER, from, "challengeResponse %i", challenge->challenge );
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return;
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}
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// Drop the authorize stuff if this client is coming in via v6 as the auth server does not support ipv6.
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if(challenge->adr.type == NA_IP)
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{
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// look up the authorize server's IP
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if ( !svs.authorizeAddress.ip[0] && svs.authorizeAddress.type != NA_BAD ) {
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Com_Printf( "Resolving %s\n", AUTHORIZE_SERVER_NAME );
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if ( !NET_StringToAdr( AUTHORIZE_SERVER_NAME, &svs.authorizeAddress, NA_IP ) ) {
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Com_Printf( "Couldn't resolve address\n" );
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return;
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}
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svs.authorizeAddress.port = BigShort( PORT_AUTHORIZE );
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Com_Printf( "%s resolved to %i.%i.%i.%i:%i\n", AUTHORIZE_SERVER_NAME,
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svs.authorizeAddress.ip[0], svs.authorizeAddress.ip[1],
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svs.authorizeAddress.ip[2], svs.authorizeAddress.ip[3],
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BigShort( svs.authorizeAddress.port ) );
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}
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// if they have been challenging for a long time and we
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// haven't heard anything from the authorize server, go ahead and
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// let them in, assuming the id server is down
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if ( svs.time - challenge->firstTime > AUTHORIZE_TIMEOUT ) {
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Com_DPrintf( "authorize server timed out\n" );
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challenge->pingTime = svs.time;
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NET_OutOfBandPrint( NS_SERVER, challenge->adr,
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"challengeResponse %i", challenge->challenge );
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return;
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}
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// otherwise send their ip to the authorize server
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if ( svs.authorizeAddress.type != NA_BAD ) {
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cvar_t *fs;
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char game[1024];
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Com_DPrintf( "sending getIpAuthorize for %s\n", NET_AdrToString( from ));
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strcpy(game, BASEGAME);
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fs = Cvar_Get ("fs_game", "", CVAR_INIT|CVAR_SYSTEMINFO );
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if (fs && fs->string[0] != 0) {
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strcpy(game, fs->string);
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}
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// the 0 is for backwards compatibility with obsolete sv_allowanonymous flags
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// getIpAuthorize <challenge> <IP> <game> 0 <auth-flag>
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NET_OutOfBandPrint( NS_SERVER, svs.authorizeAddress,
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"getIpAuthorize %i %i.%i.%i.%i %s 0 %s", svs.challenges[i].challenge,
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from.ip[0], from.ip[1], from.ip[2], from.ip[3], game, sv_strictAuth->string );
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}
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}
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else
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{
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challenge->pingTime = svs.time;
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NET_OutOfBandPrint( NS_SERVER, challenge->adr,
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"challengeResponse %i", challenge->challenge );
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}
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#endif
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}
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#ifndef STANDALONE
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/*
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====================
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SV_AuthorizeIpPacket
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A packet has been returned from the authorize server.
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If we have a challenge adr for that ip, send the
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challengeResponse to it
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====================
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*/
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void SV_AuthorizeIpPacket( netadr_t from ) {
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int challenge;
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int i;
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char *s;
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char *r;
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if ( !NET_CompareBaseAdr( from, svs.authorizeAddress ) ) {
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Com_Printf( "SV_AuthorizeIpPacket: not from authorize server\n" );
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return;
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}
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challenge = atoi( Cmd_Argv( 1 ) );
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for (i = 0 ; i < MAX_CHALLENGES ; i++) {
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if ( svs.challenges[i].challenge == challenge ) {
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break;
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}
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}
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if ( i == MAX_CHALLENGES ) {
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Com_Printf( "SV_AuthorizeIpPacket: challenge not found\n" );
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return;
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}
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// send a packet back to the original client
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svs.challenges[i].pingTime = svs.time;
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s = Cmd_Argv( 2 );
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r = Cmd_Argv( 3 ); // reason
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if ( !Q_stricmp( s, "demo" ) ) {
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// they are a demo client trying to connect to a real server
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NET_OutOfBandPrint( NS_SERVER, svs.challenges[i].adr, "print\nServer is not a demo server\n" );
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// clear the challenge record so it won't timeout and let them through
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Com_Memset( &svs.challenges[i], 0, sizeof( svs.challenges[i] ) );
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return;
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}
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if ( !Q_stricmp( s, "accept" ) ) {
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NET_OutOfBandPrint( NS_SERVER, svs.challenges[i].adr,
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"challengeResponse %i", svs.challenges[i].challenge );
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return;
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}
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if ( !Q_stricmp( s, "unknown" ) ) {
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if (!r) {
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NET_OutOfBandPrint( NS_SERVER, svs.challenges[i].adr, "print\nAwaiting CD key authorization\n" );
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} else {
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NET_OutOfBandPrint( NS_SERVER, svs.challenges[i].adr, "print\n%s\n", r);
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}
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// clear the challenge record so it won't timeout and let them through
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Com_Memset( &svs.challenges[i], 0, sizeof( svs.challenges[i] ) );
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return;
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}
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// authorization failed
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if (!r) {
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NET_OutOfBandPrint( NS_SERVER, svs.challenges[i].adr, "print\nSomeone is using this CD Key\n" );
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} else {
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NET_OutOfBandPrint( NS_SERVER, svs.challenges[i].adr, "print\n%s\n", r );
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}
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// clear the challenge record so it won't timeout and let them through
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Com_Memset( &svs.challenges[i], 0, sizeof( svs.challenges[i] ) );
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}
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#endif
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/*
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==================
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SV_IsBanned
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Check whether a certain address is banned
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==================
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*/
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qboolean SV_IsBanned(netadr_t *from, qboolean isexception)
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{
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int index, addrlen, curbyte, netmask, cmpmask;
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serverBan_t *curban;
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byte *addrfrom, *addrban;
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qboolean differed;
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if(from->type == NA_IP)
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addrlen = sizeof(from->ip);
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else if(from->type == NA_IP6)
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addrlen = sizeof(from->ip6);
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else
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return qfalse;
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if(!isexception)
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{
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// If this is a query for a ban, first check whether the client is excepted
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if(SV_IsBanned(from, qtrue))
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return qfalse;
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}
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for(index = 0; index < serverBansCount; index++)
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{
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curban = &serverBans[index];
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if(curban->isexception == isexception && from->type == curban->ip.type)
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{
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if(from->type == NA_IP)
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{
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addrfrom = from->ip;
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addrban = curban->ip.ip;
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}
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else
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{
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addrfrom = from->ip6;
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addrban = curban->ip.ip6;
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}
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differed = qfalse;
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curbyte = 0;
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for(netmask = curban->subnet; netmask > 7; netmask -= 8)
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{
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if(addrfrom[curbyte] != addrban[curbyte])
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{
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differed = qtrue;
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break;
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}
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curbyte++;
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}
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if(differed)
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continue;
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if(netmask)
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{
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cmpmask = (1 << netmask) - 1;
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cmpmask <<= 8 - netmask;
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if((addrfrom[curbyte] & cmpmask) == (addrban[curbyte] & cmpmask))
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return qtrue;
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}
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else
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return qtrue;
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}
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}
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return qfalse;
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}
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/*
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==================
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SV_DirectConnect
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A "connect" OOB command has been received
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==================
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*/
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void SV_DirectConnect( netadr_t from ) {
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char userinfo[MAX_INFO_STRING];
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int i;
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client_t *cl, *newcl;
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client_t temp;
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sharedEntity_t *ent;
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int clientNum;
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int version;
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int qport;
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int challenge;
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char *password;
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int startIndex;
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intptr_t denied;
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int count;
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char *ip;
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Com_DPrintf ("SVC_DirectConnect ()\n");
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// Check whether this client is banned.
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if(SV_IsBanned(&from, qfalse))
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{
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NET_OutOfBandPrint(NS_SERVER, from, "print\nYou are banned from this server.\n");
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return;
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}
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Q_strncpyz( userinfo, Cmd_Argv(1), sizeof(userinfo) );
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version = atoi( Info_ValueForKey( userinfo, "protocol" ) );
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if ( version != PROTOCOL_VERSION ) {
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NET_OutOfBandPrint( NS_SERVER, from, "print\nServer uses protocol version %i.\n", PROTOCOL_VERSION );
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Com_DPrintf (" rejected connect from version %i\n", version);
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return;
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}
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challenge = atoi( Info_ValueForKey( userinfo, "challenge" ) );
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qport = atoi( Info_ValueForKey( userinfo, "qport" ) );
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// quick reject
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for (i=0,cl=svs.clients ; i < sv_maxclients->integer ; i++,cl++) {
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if ( cl->state == CS_FREE ) {
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continue;
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}
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if ( NET_CompareBaseAdr( from, cl->netchan.remoteAddress )
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&& ( cl->netchan.qport == qport
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|| from.port == cl->netchan.remoteAddress.port ) ) {
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if (( svs.time - cl->lastConnectTime)
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< (sv_reconnectlimit->integer * 1000)) {
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Com_DPrintf ("%s:reconnect rejected : too soon\n", NET_AdrToString (from));
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return;
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}
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break;
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}
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}
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// don't let "ip" overflow userinfo string
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if ( NET_IsLocalAddress (from) )
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ip = "localhost";
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else
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ip = (char *)NET_AdrToString( from );
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if( ( strlen( ip ) + strlen( userinfo ) + 4 ) >= MAX_INFO_STRING ) {
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NET_OutOfBandPrint( NS_SERVER, from,
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"print\nUserinfo string length exceeded. "
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"Try removing setu cvars from your config.\n" );
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return;
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}
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Info_SetValueForKey( userinfo, "ip", ip );
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// see if the challenge is valid (LAN clients don't need to challenge)
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if ( !NET_IsLocalAddress (from) ) {
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int ping;
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for (i=0 ; i<MAX_CHALLENGES ; i++) {
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if (NET_CompareAdr(from, svs.challenges[i].adr)) {
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if ( challenge == svs.challenges[i].challenge )
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break;
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}
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}
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if (i == MAX_CHALLENGES) {
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NET_OutOfBandPrint( NS_SERVER, from, "print\nNo or bad challenge for address.\n" );
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return;
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}
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ping = svs.time - svs.challenges[i].pingTime;
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Com_Printf( "Client %i connecting with %i challenge ping\n", i, ping );
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svs.challenges[i].connected = qtrue;
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// never reject a LAN client based on ping
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if ( !Sys_IsLANAddress( from ) ) {
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if ( sv_minPing->value && ping < sv_minPing->value ) {
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// don't let them keep trying until they get a big delay
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NET_OutOfBandPrint( NS_SERVER, from, "print\nServer is for high pings only\n" );
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Com_DPrintf ("Client %i rejected on a too low ping\n", i);
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// reset the address otherwise their ping will keep increasing
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// with each connect message and they'd eventually be able to connect
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svs.challenges[i].adr.port = 0;
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return;
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}
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if ( sv_maxPing->value && ping > sv_maxPing->value ) {
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NET_OutOfBandPrint( NS_SERVER, from, "print\nServer is for low pings only\n" );
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Com_DPrintf ("Client %i rejected on a too high ping\n", i);
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return;
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}
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}
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}
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newcl = &temp;
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Com_Memset (newcl, 0, sizeof(client_t));
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// if there is already a slot for this ip, reuse it
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for (i=0,cl=svs.clients ; i < sv_maxclients->integer ; i++,cl++) {
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if ( cl->state == CS_FREE ) {
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continue;
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}
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if ( NET_CompareBaseAdr( from, cl->netchan.remoteAddress )
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&& ( cl->netchan.qport == qport
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|| from.port == cl->netchan.remoteAddress.port ) ) {
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Com_Printf ("%s:reconnect\n", NET_AdrToString (from));
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newcl = cl;
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// this doesn't work because it nukes the players userinfo
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// // disconnect the client from the game first so any flags the
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// // player might have are dropped
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// VM_Call( gvm, GAME_CLIENT_DISCONNECT, newcl - svs.clients );
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//
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goto gotnewcl;
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}
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}
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// find a client slot
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// if "sv_privateClients" is set > 0, then that number
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// of client slots will be reserved for connections that
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// have "password" set to the value of "sv_privatePassword"
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// Info requests will report the maxclients as if the private
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// slots didn't exist, to prevent people from trying to connect
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// to a full server.
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// This is to allow us to reserve a couple slots here on our
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// servers so we can play without having to kick people.
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// check for privateClient password
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password = Info_ValueForKey( userinfo, "password" );
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if ( !strcmp( password, sv_privatePassword->string ) ) {
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startIndex = 0;
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} else {
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// skip past the reserved slots
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startIndex = sv_privateClients->integer;
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}
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newcl = NULL;
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for ( i = startIndex; i < sv_maxclients->integer ; i++ ) {
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cl = &svs.clients[i];
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if (cl->state == CS_FREE) {
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newcl = cl;
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break;
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}
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}
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if ( !newcl ) {
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if ( NET_IsLocalAddress( from ) ) {
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count = 0;
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for ( i = startIndex; i < sv_maxclients->integer ; i++ ) {
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cl = &svs.clients[i];
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if (cl->netchan.remoteAddress.type == NA_BOT) {
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count++;
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}
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}
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// if they're all bots
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if (count >= sv_maxclients->integer - startIndex) {
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SV_DropClient(&svs.clients[sv_maxclients->integer - 1], "only bots on server");
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newcl = &svs.clients[sv_maxclients->integer - 1];
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}
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else {
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Com_Error( ERR_FATAL, "server is full on local connect\n" );
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return;
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}
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}
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else {
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NET_OutOfBandPrint( NS_SERVER, from, "print\nServer is full.\n" );
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Com_DPrintf ("Rejected a connection.\n");
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return;
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}
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}
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// we got a newcl, so reset the reliableSequence and reliableAcknowledge
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cl->reliableAcknowledge = 0;
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cl->reliableSequence = 0;
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|
|
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);
|
|
// init the netchan queue
|
|
newcl->netchan_end_queue = &newcl->netchan_start_queue;
|
|
|
|
// 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 = VM_Call( gvm, GAME_CLIENT_CONNECT, clientNum, qtrue, qfalse ); // firstTime = qtrue
|
|
if ( denied ) {
|
|
// we can't just use VM_ArgPtr, because that is only valid inside a VM_Call
|
|
char *str = VM_ExplicitArgPtr( gvm, denied );
|
|
|
|
NET_OutOfBandPrint( NS_SERVER, from, "print\n%s\n", str );
|
|
Com_DPrintf ("Game rejected a connection: %s.\n", str);
|
|
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;
|
|
|
|
// 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;
|
|
|
|
if ( drop->state == CS_ZOMBIE ) {
|
|
return; // already dropped
|
|
}
|
|
|
|
if (drop->netchan.remoteAddress.type != NA_BOT) {
|
|
// 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 ) ) {
|
|
challenge->connected = qfalse;
|
|
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 );
|
|
|
|
|
|
if (drop->download) {
|
|
FS_FCloseFile( drop->download );
|
|
drop->download = 0;
|
|
}
|
|
|
|
// call the prog function for removing a client
|
|
// this will remove the body, among other things
|
|
VM_Call( gvm, GAME_CLIENT_DISCONNECT, drop - svs.clients );
|
|
|
|
// add the disconnect command
|
|
SV_SendServerCommand( drop, "disconnect \"%s\"", reason);
|
|
|
|
if ( drop->netchan.remoteAddress.type == NA_BOT ) {
|
|
SV_BotFreeClient( drop - svs.clients );
|
|
}
|
|
|
|
// nuke user info
|
|
SV_SetUserinfo( drop - svs.clients, "" );
|
|
|
|
Com_DPrintf( "Going to CS_ZOMBIE for %s\n", drop->name );
|
|
drop->state = CS_ZOMBIE; // become free in a few seconds
|
|
|
|
// 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();
|
|
}
|
|
}
|
|
|
|
/*
|
|
================
|
|
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 ) {
|
|
int start;
|
|
entityState_t *base, nullstate;
|
|
msg_t msg;
|
|
byte msgBuffer[MAX_MSGLEN];
|
|
|
|
Com_DPrintf ("SV_SendClientGameState() for %s\n", client->name);
|
|
Com_DPrintf( "Going from CS_CONNECTED to CS_PRIMED for %s\n", client->name );
|
|
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;
|
|
|
|
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_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);
|
|
|
|
// 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->deltaMessage = -1;
|
|
client->nextSnapshotTime = svs.time; // generate a snapshot immediately
|
|
client->lastUsercmd = *cmd;
|
|
|
|
// call the game begin function
|
|
VM_Call( gvm, GAME_CLIENT_BEGIN, client - svs.clients );
|
|
}
|
|
|
|
/*
|
|
============================================================
|
|
|
|
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
|
|
==================
|
|
*/
|
|
void SV_StopDownload_f( client_t *cl ) {
|
|
if (*cl->downloadName)
|
|
Com_DPrintf( "clientDownload: %d : file \"%s\" aborted\n", (int) (cl - svs.clients), cl->downloadName );
|
|
|
|
SV_CloseDownload( cl );
|
|
}
|
|
|
|
/*
|
|
==================
|
|
SV_DoneDownload_f
|
|
|
|
Downloads are finished
|
|
==================
|
|
*/
|
|
void SV_DoneDownload_f( client_t *cl ) {
|
|
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
|
|
==================
|
|
*/
|
|
void SV_NextDownload_f( client_t *cl )
|
|
{
|
|
int block = atoi( Cmd_Argv(1) );
|
|
|
|
if (block == cl->downloadClientBlock) {
|
|
Com_DPrintf( "clientDownload: %d : client acknowledge of block %d\n", (int) (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", (int) (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
|
|
==================
|
|
*/
|
|
void SV_BeginDownload_f( client_t *cl ) {
|
|
|
|
// 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 idPack = 0, missionPack = 0, unreferenced = 1;
|
|
char errorMessage[1024];
|
|
char pakbuf[MAX_QPATH], *pakptr;
|
|
int numRefPaks;
|
|
|
|
if (!*cl->downloadName)
|
|
return; // Nothing being downloaded
|
|
|
|
if (!cl->download) {
|
|
// Chop off filename extension.
|
|
Com_sprintf(pakbuf, sizeof(pakbuf), "%s", cl->downloadName);
|
|
pakptr = Q_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 || FS_idPak(pakbuf, BASEGAME);
|
|
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
cl->download = 0;
|
|
|
|
// We open the file here
|
|
if ( !(sv_allowDownload->integer & DLF_ENABLE) ||
|
|
(sv_allowDownload->integer & DLF_NO_UDP) ||
|
|
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 & DLF_ENABLE) ||
|
|
(sv_allowDownload->integer & DLF_NO_UDP) ) {
|
|
|
|
Com_Printf("clientDownload: %d : \"%s\" download disabled", (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] = Z_Malloc( MAX_DOWNLOAD_BLKSIZE );
|
|
|
|
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 ( sv_minRate->integer ) {
|
|
if ( sv_minRate->integer < 1000 )
|
|
Cvar_Set( "sv_minRate", "1000" );
|
|
if ( sv_minRate->integer > rate )
|
|
rate = sv_minRate->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,
|
|
// automatically start retransmitting
|
|
|
|
if (cl->downloadClientBlock == cl->downloadCurrentBlock)
|
|
return; // Nothing to transmit
|
|
|
|
if (cl->downloadXmitBlock == cl->downloadCurrentBlock) {
|
|
// We have transmitted the complete window, should we start resending?
|
|
|
|
//FIXME: This uses a hardcoded one second timeout for lost blocks
|
|
//the timeout should be based on client rate somehow
|
|
if (svs.time - cl->downloadSendTime > 1000)
|
|
cl->downloadXmitBlock = cl->downloadClientBlock;
|
|
else
|
|
return;
|
|
}
|
|
|
|
// Send current block
|
|
curindex = (cl->downloadXmitBlock % MAX_DOWNLOAD_WINDOW);
|
|
|
|
MSG_WriteByte( msg, svc_download );
|
|
MSG_WriteShort( msg, cl->downloadXmitBlock );
|
|
|
|
// block zero is special, contains file size
|
|
if ( cl->downloadXmitBlock == 0 )
|
|
MSG_WriteLong( msg, cl->downloadSize );
|
|
|
|
MSG_WriteShort( msg, cl->downloadBlockSize[curindex] );
|
|
|
|
// Write the block
|
|
if ( cl->downloadBlockSize[curindex] ) {
|
|
MSG_WriteData( msg, cl->downloadBlocks[curindex], cl->downloadBlockSize[curindex] );
|
|
}
|
|
|
|
Com_DPrintf( "clientDownload: %d : writing block %d\n", (int) (cl - svs.clients), cl->downloadXmitBlock );
|
|
|
|
// Move on to the next block
|
|
// It will get sent with next snap shot. The rate will keep us in line.
|
|
cl->downloadXmitBlock++;
|
|
|
|
cl->downloadSendTime = svs.time;
|
|
}
|
|
}
|
|
|
|
#if USE_VOIP
|
|
/*
|
|
==================
|
|
SV_WriteVoipToClient
|
|
|
|
Check to see if there is any VoIP queued for a client, and send if there is.
|
|
==================
|
|
*/
|
|
void SV_WriteVoipToClient( client_t *cl, msg_t *msg )
|
|
{
|
|
voipServerPacket_t *packet = &cl->voipPacket[0];
|
|
int totalbytes = 0;
|
|
int i;
|
|
|
|
if (*cl->downloadName) {
|
|
cl->queuedVoipPackets = 0;
|
|
return; // no VoIP allowed if download is going, to save bandwidth.
|
|
}
|
|
|
|
// Write as many VoIP packets as we reasonably can...
|
|
for (i = 0; i < cl->queuedVoipPackets; i++, packet++) {
|
|
totalbytes += packet->len;
|
|
if (totalbytes > MAX_DOWNLOAD_BLKSIZE)
|
|
break;
|
|
|
|
// You have to start with a svc_EOF, so legacy clients drop the
|
|
// rest of this packet. Otherwise, those without VoIP support will
|
|
// see the svc_voip command, then panic and disconnect.
|
|
// Generally we don't send VoIP packets to legacy clients, but this
|
|
// serves as both a safety measure and a means to keep demo files
|
|
// compatible.
|
|
MSG_WriteByte( msg, svc_EOF );
|
|
MSG_WriteByte( msg, svc_extension );
|
|
MSG_WriteByte( msg, svc_voip );
|
|
MSG_WriteShort( msg, packet->sender );
|
|
MSG_WriteByte( msg, (byte) packet->generation );
|
|
MSG_WriteLong( msg, packet->sequence );
|
|
MSG_WriteByte( msg, packet->frames );
|
|
MSG_WriteShort( msg, packet->len );
|
|
MSG_WriteData( msg, packet->data, packet->len );
|
|
}
|
|
|
|
// !!! FIXME: I hate this queue system.
|
|
cl->queuedVoipPackets -= i;
|
|
if (cl->queuedVoipPackets > 0) {
|
|
memmove( &cl->voipPacket[0], &cl->voipPacket[i],
|
|
sizeof (voipServerPacket_t) * i);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
|
|
/*
|
|
=================
|
|
SV_Disconnect_f
|
|
|
|
The client is going to disconnect, so remove the connection immediately FIXME: move to game?
|
|
=================
|
|
*/
|
|
static void SV_Disconnect_f( client_t *cl ) {
|
|
SV_DropClient( cl, "disconnected" );
|
|
}
|
|
|
|
/*
|
|
=================
|
|
SV_VerifyPaks_f
|
|
|
|
If we are pure, disconnect the client if they do no meet the following conditions:
|
|
|
|
1. the first two checksums match our view of cgame and ui
|
|
2. there are no any additional checksums that we do not have
|
|
|
|
This routine would be a bit simpler with a goto but i abstained
|
|
|
|
=================
|
|
*/
|
|
static void SV_VerifyPaks_f( client_t *cl ) {
|
|
int nChkSum1, nChkSum2, nClientPaks, nServerPaks, i, j, nCurArg;
|
|
int nClientChkSum[1024];
|
|
int nServerChkSum[1024];
|
|
const char *pPaks, *pArg;
|
|
qboolean bGood = qtrue;
|
|
|
|
// if we are pure, we "expect" the client to load certain things from
|
|
// certain pk3 files, namely we want the client to have loaded the
|
|
// ui and cgame that we think should be loaded based on the pure setting
|
|
//
|
|
if ( sv_pure->integer != 0 ) {
|
|
|
|
bGood = qtrue;
|
|
nChkSum1 = nChkSum2 = 0;
|
|
// we run the game, so determine which cgame and ui the client "should" be running
|
|
bGood = (FS_FileIsInPAK("vm/cgame.qvm", &nChkSum1) == 1);
|
|
if (bGood)
|
|
bGood = (FS_FileIsInPAK("vm/ui.qvm", &nChkSum2) == 1);
|
|
|
|
nClientPaks = Cmd_Argc();
|
|
|
|
// start at arg 2 ( skip serverId cl_paks )
|
|
nCurArg = 1;
|
|
|
|
pArg = Cmd_Argv(nCurArg++);
|
|
if(!pArg) {
|
|
bGood = qfalse;
|
|
}
|
|
else
|
|
{
|
|
// https://zerowing.idsoftware.com/bugzilla/show_bug.cgi?id=475
|
|
// we may get incoming cp sequences from a previous checksumFeed, which we need to ignore
|
|
// since serverId is a frame count, it always goes up
|
|
if (atoi(pArg) < sv.checksumFeedServerId)
|
|
{
|
|
Com_DPrintf("ignoring outdated cp command from client %s\n", cl->name);
|
|
return;
|
|
}
|
|
}
|
|
|
|
// we basically use this while loop to avoid using 'goto' :)
|
|
while (bGood) {
|
|
|
|
// must be at least 6: "cl_paks cgame ui @ firstref ... numChecksums"
|
|
// numChecksums is encoded
|
|
if (nClientPaks < 6) {
|
|
bGood = qfalse;
|
|
break;
|
|
}
|
|
// verify first to be the cgame checksum
|
|
pArg = Cmd_Argv(nCurArg++);
|
|
if (!pArg || *pArg == '@' || atoi(pArg) != nChkSum1 ) {
|
|
bGood = qfalse;
|
|
break;
|
|
}
|
|
// verify the second to be the ui checksum
|
|
pArg = Cmd_Argv(nCurArg++);
|
|
if (!pArg || *pArg == '@' || atoi(pArg) != nChkSum2 ) {
|
|
bGood = qfalse;
|
|
break;
|
|
}
|
|
// should be sitting at the delimeter now
|
|
pArg = Cmd_Argv(nCurArg++);
|
|
if (*pArg != '@') {
|
|
bGood = qfalse;
|
|
break;
|
|
}
|
|
// store checksums since tokenization is not re-entrant
|
|
for (i = 0; nCurArg < nClientPaks; i++) {
|
|
nClientChkSum[i] = atoi(Cmd_Argv(nCurArg++));
|
|
}
|
|
|
|
// store number to compare against (minus one cause the last is the number of checksums)
|
|
nClientPaks = i - 1;
|
|
|
|
// make sure none of the client check sums are the same
|
|
// so the client can't send 5 the same checksums
|
|
for (i = 0; i < nClientPaks; i++) {
|
|
for (j = 0; j < nClientPaks; j++) {
|
|
if (i == j)
|
|
continue;
|
|
if (nClientChkSum[i] == nClientChkSum[j]) {
|
|
bGood = qfalse;
|
|
break;
|
|
}
|
|
}
|
|
if (bGood == qfalse)
|
|
break;
|
|
}
|
|
if (bGood == qfalse)
|
|
break;
|
|
|
|
// get the pure checksums of the pk3 files loaded by the server
|
|
pPaks = FS_LoadedPakPureChecksums();
|
|
Cmd_TokenizeString( pPaks );
|
|
nServerPaks = Cmd_Argc();
|
|
if (nServerPaks > 1024)
|
|
nServerPaks = 1024;
|
|
|
|
for (i = 0; i < nServerPaks; i++) {
|
|
nServerChkSum[i] = atoi(Cmd_Argv(i));
|
|
}
|
|
|
|
// check if the client has provided any pure checksums of pk3 files not loaded by the server
|
|
for (i = 0; i < nClientPaks; i++) {
|
|
for (j = 0; j < nServerPaks; j++) {
|
|
if (nClientChkSum[i] == nServerChkSum[j]) {
|
|
break;
|
|
}
|
|
}
|
|
if (j >= nServerPaks) {
|
|
bGood = qfalse;
|
|
break;
|
|
}
|
|
}
|
|
if ( bGood == qfalse ) {
|
|
break;
|
|
}
|
|
|
|
// check if the number of checksums was correct
|
|
nChkSum1 = sv.checksumFeed;
|
|
for (i = 0; i < nClientPaks; i++) {
|
|
nChkSum1 ^= nClientChkSum[i];
|
|
}
|
|
nChkSum1 ^= nClientPaks;
|
|
if (nChkSum1 != nClientChkSum[nClientPaks]) {
|
|
bGood = qfalse;
|
|
break;
|
|
}
|
|
|
|
// break out
|
|
break;
|
|
}
|
|
|
|
cl->gotCP = qtrue;
|
|
|
|
if (bGood) {
|
|
cl->pureAuthentic = 1;
|
|
}
|
|
else {
|
|
cl->pureAuthentic = 0;
|
|
cl->nextSnapshotTime = -1;
|
|
cl->state = CS_ACTIVE;
|
|
SV_SendClientSnapshot( cl );
|
|
SV_DropClient( cl, "Unpure client detected. Invalid .PK3 files referenced!" );
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
=================
|
|
SV_ResetPureClient_f
|
|
=================
|
|
*/
|
|
static void SV_ResetPureClient_f( client_t *cl ) {
|
|
cl->pureAuthentic = 0;
|
|
cl->gotCP = qfalse;
|
|
}
|
|
|
|
/*
|
|
=================
|
|
SV_UserinfoChanged
|
|
|
|
Pull specific info from a newly changed userinfo string
|
|
into a more C friendly form.
|
|
=================
|
|
*/
|
|
void SV_UserinfoChanged( client_t *cl ) {
|
|
char *val;
|
|
char *ip;
|
|
int i;
|
|
int len;
|
|
|
|
// name for C code
|
|
Q_strncpyz( cl->name, Info_ValueForKey (cl->userinfo, "name"), sizeof(cl->name) );
|
|
|
|
// rate command
|
|
|
|
// if the client is on the same subnet as the server and we aren't running an
|
|
// internet public server, assume they don't need a rate choke
|
|
if ( Sys_IsLANAddress( cl->netchan.remoteAddress ) && com_dedicated->integer != 2 && sv_lanForceRate->integer == 1) {
|
|
cl->rate = 99999; // lans should not rate limit
|
|
} else {
|
|
val = Info_ValueForKey (cl->userinfo, "rate");
|
|
if (strlen(val)) {
|
|
i = atoi(val);
|
|
cl->rate = i;
|
|
if (cl->rate < 1000) {
|
|
cl->rate = 1000;
|
|
} else if (cl->rate > 90000) {
|
|
cl->rate = 90000;
|
|
}
|
|
} else {
|
|
cl->rate = 3000;
|
|
}
|
|
}
|
|
val = Info_ValueForKey (cl->userinfo, "handicap");
|
|
if (strlen(val)) {
|
|
i = atoi(val);
|
|
if (i<=0 || i>100 || strlen(val) > 4) {
|
|
Info_SetValueForKey( cl->userinfo, "handicap", "100" );
|
|
}
|
|
}
|
|
|
|
// snaps command
|
|
val = Info_ValueForKey (cl->userinfo, "snaps");
|
|
if (strlen(val)) {
|
|
i = atoi(val);
|
|
if ( i < 1 ) {
|
|
i = 1;
|
|
} else if ( i > sv_fps->integer ) {
|
|
i = sv_fps->integer;
|
|
}
|
|
cl->snapshotMsec = 1000/i;
|
|
} else {
|
|
cl->snapshotMsec = 50;
|
|
}
|
|
|
|
#if USE_VOIP
|
|
// in the future, (val) will be a protocol version string, so only
|
|
// accept explicitly 1, not generally non-zero.
|
|
val = Info_ValueForKey (cl->userinfo, "voip");
|
|
cl->hasVoip = (atoi(val) == 1) ? qtrue : qfalse;
|
|
#endif
|
|
|
|
// TTimo
|
|
// maintain the IP information
|
|
// the banning code relies on this being consistently present
|
|
if( NET_IsLocalAddress(cl->netchan.remoteAddress) )
|
|
ip = "localhost";
|
|
else
|
|
ip = (char*)NET_AdrToString( cl->netchan.remoteAddress );
|
|
|
|
val = Info_ValueForKey( cl->userinfo, "ip" );
|
|
if( val[0] )
|
|
len = strlen( ip ) - strlen( val ) + strlen( cl->userinfo );
|
|
else
|
|
len = strlen( ip ) + 4 + strlen( cl->userinfo );
|
|
|
|
if( len >= MAX_INFO_STRING )
|
|
SV_DropClient( cl, "userinfo string length exceeded" );
|
|
else
|
|
Info_SetValueForKey( cl->userinfo, "ip", ip );
|
|
|
|
}
|
|
|
|
|
|
/*
|
|
==================
|
|
SV_UpdateUserinfo_f
|
|
==================
|
|
*/
|
|
static void SV_UpdateUserinfo_f( client_t *cl ) {
|
|
Q_strncpyz( cl->userinfo, Cmd_Argv(1), sizeof(cl->userinfo) );
|
|
|
|
SV_UserinfoChanged( cl );
|
|
// call prog code to allow overrides
|
|
VM_Call( gvm, GAME_CLIENT_USERINFO_CHANGED, cl - svs.clients );
|
|
}
|
|
|
|
|
|
#if USE_VOIP
|
|
static
|
|
void SV_UpdateVoipIgnore(client_t *cl, const char *idstr, qboolean ignore)
|
|
{
|
|
if ((*idstr >= '0') && (*idstr <= '9')) {
|
|
const int id = atoi(idstr);
|
|
if ((id >= 0) && (id < MAX_CLIENTS)) {
|
|
cl->ignoreVoipFromClient[id] = ignore;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
==================
|
|
SV_UpdateUserinfo_f
|
|
==================
|
|
*/
|
|
static void SV_Voip_f( client_t *cl ) {
|
|
const char *cmd = Cmd_Argv(1);
|
|
if (strcmp(cmd, "ignore") == 0) {
|
|
SV_UpdateVoipIgnore(cl, Cmd_Argv(2), qtrue);
|
|
} else if (strcmp(cmd, "unignore") == 0) {
|
|
SV_UpdateVoipIgnore(cl, Cmd_Argv(2), qfalse);
|
|
} else if (strcmp(cmd, "muteall") == 0) {
|
|
cl->muteAllVoip = qtrue;
|
|
} else if (strcmp(cmd, "unmuteall") == 0) {
|
|
cl->muteAllVoip = qfalse;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
|
|
typedef struct {
|
|
char *name;
|
|
void (*func)( client_t *cl );
|
|
} ucmd_t;
|
|
|
|
static ucmd_t ucmds[] = {
|
|
{"userinfo", SV_UpdateUserinfo_f},
|
|
{"disconnect", SV_Disconnect_f},
|
|
{"cp", SV_VerifyPaks_f},
|
|
{"vdr", SV_ResetPureClient_f},
|
|
{"download", SV_BeginDownload_f},
|
|
{"nextdl", SV_NextDownload_f},
|
|
{"stopdl", SV_StopDownload_f},
|
|
{"donedl", SV_DoneDownload_f},
|
|
|
|
#if USE_VOIP
|
|
{"voip", SV_Voip_f},
|
|
#endif
|
|
|
|
{NULL, NULL}
|
|
};
|
|
|
|
/*
|
|
==================
|
|
SV_ExecuteClientCommand
|
|
|
|
Also called by bot code
|
|
==================
|
|
*/
|
|
void SV_ExecuteClientCommand( client_t *cl, const char *s, qboolean clientOK ) {
|
|
ucmd_t *u;
|
|
qboolean bProcessed = qfalse;
|
|
|
|
Cmd_TokenizeString( s );
|
|
|
|
// see if it is a server level command
|
|
for (u=ucmds ; u->name ; u++) {
|
|
if (!strcmp (Cmd_Argv(0), u->name) ) {
|
|
u->func( cl );
|
|
bProcessed = qtrue;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (clientOK) {
|
|
// pass unknown strings to the game
|
|
if (!u->name && sv.state == SS_GAME) {
|
|
VM_Call( gvm, GAME_CLIENT_COMMAND, cl - svs.clients );
|
|
}
|
|
}
|
|
else if (!bProcessed)
|
|
Com_DPrintf( "client text ignored for %s: %s\n", cl->name, Cmd_Argv(0) );
|
|
}
|
|
|
|
/*
|
|
===============
|
|
SV_ClientCommand
|
|
===============
|
|
*/
|
|
static qboolean SV_ClientCommand( client_t *cl, msg_t *msg ) {
|
|
int seq;
|
|
const char *s;
|
|
qboolean clientOk = qtrue;
|
|
|
|
seq = MSG_ReadLong( msg );
|
|
s = MSG_ReadString( msg );
|
|
|
|
// see if we have already executed it
|
|
if ( cl->lastClientCommand >= seq ) {
|
|
return qtrue;
|
|
}
|
|
|
|
Com_DPrintf( "clientCommand: %s : %i : %s\n", cl->name, seq, s );
|
|
|
|
// drop the connection if we have somehow lost commands
|
|
if ( seq > cl->lastClientCommand + 1 ) {
|
|
Com_Printf( "Client %s lost %i clientCommands\n", cl->name,
|
|
seq - cl->lastClientCommand + 1 );
|
|
SV_DropClient( cl, "Lost reliable commands" );
|
|
return qfalse;
|
|
}
|
|
|
|
// malicious users may try using too many string commands
|
|
// to lag other players. If we decide that we want to stall
|
|
// the command, we will stop processing the rest of the packet,
|
|
// including the usercmd. This causes flooders to lag themselves
|
|
// but not other people
|
|
// We don't do this when the client hasn't been active yet since its
|
|
// normal to spam a lot of commands when downloading
|
|
if ( !com_cl_running->integer &&
|
|
cl->state >= CS_ACTIVE &&
|
|
sv_floodProtect->integer &&
|
|
svs.time < cl->nextReliableTime ) {
|
|
// ignore any other text messages from this client but let them keep playing
|
|
// TTimo - moved the ignored verbose to the actual processing in SV_ExecuteClientCommand, only printing if the core doesn't intercept
|
|
clientOk = qfalse;
|
|
}
|
|
|
|
// don't allow another command for one second
|
|
cl->nextReliableTime = svs.time + 1000;
|
|
|
|
SV_ExecuteClientCommand( cl, s, clientOk );
|
|
|
|
cl->lastClientCommand = seq;
|
|
Com_sprintf(cl->lastClientCommandString, sizeof(cl->lastClientCommandString), "%s", s);
|
|
|
|
return qtrue; // continue procesing
|
|
}
|
|
|
|
|
|
//==================================================================================
|
|
|
|
|
|
/*
|
|
==================
|
|
SV_ClientThink
|
|
|
|
Also called by bot code
|
|
==================
|
|
*/
|
|
void SV_ClientThink (client_t *cl, usercmd_t *cmd) {
|
|
cl->lastUsercmd = *cmd;
|
|
|
|
if ( cl->state != CS_ACTIVE ) {
|
|
return; // may have been kicked during the last usercmd
|
|
}
|
|
|
|
VM_Call( gvm, GAME_CLIENT_THINK, cl - svs.clients );
|
|
}
|
|
|
|
/*
|
|
==================
|
|
SV_UserMove
|
|
|
|
The message usually contains all the movement commands
|
|
that were in the last three packets, so that the information
|
|
in dropped packets can be recovered.
|
|
|
|
On very fast clients, there may be multiple usercmd packed into
|
|
each of the backup packets.
|
|
==================
|
|
*/
|
|
static void SV_UserMove( client_t *cl, msg_t *msg, qboolean delta ) {
|
|
int i, key;
|
|
int cmdCount;
|
|
usercmd_t nullcmd;
|
|
usercmd_t cmds[MAX_PACKET_USERCMDS];
|
|
usercmd_t *cmd, *oldcmd;
|
|
|
|
if ( delta ) {
|
|
cl->deltaMessage = cl->messageAcknowledge;
|
|
} else {
|
|
cl->deltaMessage = -1;
|
|
}
|
|
|
|
cmdCount = MSG_ReadByte( msg );
|
|
|
|
if ( cmdCount < 1 ) {
|
|
Com_Printf( "cmdCount < 1\n" );
|
|
return;
|
|
}
|
|
|
|
if ( cmdCount > MAX_PACKET_USERCMDS ) {
|
|
Com_Printf( "cmdCount > MAX_PACKET_USERCMDS\n" );
|
|
return;
|
|
}
|
|
|
|
// use the checksum feed in the key
|
|
key = sv.checksumFeed;
|
|
// also use the message acknowledge
|
|
key ^= cl->messageAcknowledge;
|
|
// also use the last acknowledged server command in the key
|
|
key ^= Com_HashKey(cl->reliableCommands[ cl->reliableAcknowledge & (MAX_RELIABLE_COMMANDS-1) ], 32);
|
|
|
|
Com_Memset( &nullcmd, 0, sizeof(nullcmd) );
|
|
oldcmd = &nullcmd;
|
|
for ( i = 0 ; i < cmdCount ; i++ ) {
|
|
cmd = &cmds[i];
|
|
MSG_ReadDeltaUsercmdKey( msg, key, oldcmd, cmd );
|
|
oldcmd = cmd;
|
|
}
|
|
|
|
// save time for ping calculation
|
|
cl->frames[ cl->messageAcknowledge & PACKET_MASK ].messageAcked = svs.time;
|
|
|
|
// TTimo
|
|
// catch the no-cp-yet situation before SV_ClientEnterWorld
|
|
// if CS_ACTIVE, then it's time to trigger a new gamestate emission
|
|
// if not, then we are getting remaining parasite usermove commands, which we should ignore
|
|
if (sv_pure->integer != 0 && cl->pureAuthentic == 0 && !cl->gotCP) {
|
|
if (cl->state == CS_ACTIVE)
|
|
{
|
|
// we didn't get a cp yet, don't assume anything and just send the gamestate all over again
|
|
Com_DPrintf( "%s: didn't get cp command, resending gamestate\n", cl->name);
|
|
SV_SendClientGameState( cl );
|
|
}
|
|
return;
|
|
}
|
|
|
|
// if this is the first usercmd we have received
|
|
// this gamestate, put the client into the world
|
|
if ( cl->state == CS_PRIMED ) {
|
|
SV_ClientEnterWorld( cl, &cmds[0] );
|
|
// the moves can be processed normaly
|
|
}
|
|
|
|
// a bad cp command was sent, drop the client
|
|
if (sv_pure->integer != 0 && cl->pureAuthentic == 0) {
|
|
SV_DropClient( cl, "Cannot validate pure client!");
|
|
return;
|
|
}
|
|
|
|
if ( cl->state != CS_ACTIVE ) {
|
|
cl->deltaMessage = -1;
|
|
return;
|
|
}
|
|
|
|
// usually, the first couple commands will be duplicates
|
|
// of ones we have previously received, but the servertimes
|
|
// in the commands will cause them to be immediately discarded
|
|
for ( i = 0 ; i < cmdCount ; i++ ) {
|
|
// if this is a cmd from before a map_restart ignore it
|
|
if ( cmds[i].serverTime > cmds[cmdCount-1].serverTime ) {
|
|
continue;
|
|
}
|
|
// extremely lagged or cmd from before a map_restart
|
|
//if ( cmds[i].serverTime > svs.time + 3000 ) {
|
|
// continue;
|
|
//}
|
|
// don't execute if this is an old cmd which is already executed
|
|
// these old cmds are included when cl_packetdup > 0
|
|
if ( cmds[i].serverTime <= cl->lastUsercmd.serverTime ) {
|
|
continue;
|
|
}
|
|
SV_ClientThink (cl, &cmds[ i ]);
|
|
}
|
|
}
|
|
|
|
|
|
#if USE_VOIP
|
|
static
|
|
qboolean SV_ShouldIgnoreVoipSender(const client_t *cl)
|
|
{
|
|
if (!sv_voip->integer)
|
|
return qtrue; // VoIP disabled on this server.
|
|
else if (!cl->hasVoip) // client doesn't have VoIP support?!
|
|
return qtrue;
|
|
|
|
// !!! FIXME: implement player blacklist.
|
|
|
|
return qfalse; // don't ignore.
|
|
}
|
|
|
|
static
|
|
void SV_UserVoip( client_t *cl, msg_t *msg ) {
|
|
const int sender = (int) (cl - svs.clients);
|
|
const int generation = MSG_ReadByte(msg);
|
|
const int sequence = MSG_ReadLong(msg);
|
|
const int frames = MSG_ReadByte(msg);
|
|
const int recip1 = MSG_ReadLong(msg);
|
|
const int recip2 = MSG_ReadLong(msg);
|
|
const int recip3 = MSG_ReadLong(msg);
|
|
const int packetsize = MSG_ReadShort(msg);
|
|
byte encoded[sizeof (cl->voipPacket[0].data)];
|
|
client_t *client = NULL;
|
|
voipServerPacket_t *packet = NULL;
|
|
int i;
|
|
|
|
if (generation < 0)
|
|
return; // short/invalid packet, bail.
|
|
else if (sequence < 0)
|
|
return; // short/invalid packet, bail.
|
|
else if (frames < 0)
|
|
return; // short/invalid packet, bail.
|
|
else if (recip1 < 0)
|
|
return; // short/invalid packet, bail.
|
|
else if (recip2 < 0)
|
|
return; // short/invalid packet, bail.
|
|
else if (recip3 < 0)
|
|
return; // short/invalid packet, bail.
|
|
else if (packetsize < 0)
|
|
return; // short/invalid packet, bail.
|
|
|
|
if (packetsize > sizeof (encoded)) { // overlarge packet?
|
|
int bytesleft = packetsize;
|
|
while (bytesleft) {
|
|
int br = bytesleft;
|
|
if (br > sizeof (encoded))
|
|
br = sizeof (encoded);
|
|
MSG_ReadData(msg, encoded, br);
|
|
bytesleft -= br;
|
|
}
|
|
return; // overlarge packet, bail.
|
|
}
|
|
|
|
MSG_ReadData(msg, encoded, packetsize);
|
|
|
|
if (SV_ShouldIgnoreVoipSender(cl))
|
|
return; // Blacklisted, disabled, etc.
|
|
|
|
// !!! FIXME: see if we read past end of msg...
|
|
|
|
// !!! FIXME: reject if not speex narrowband codec.
|
|
// !!! FIXME: decide if this is bogus data?
|
|
|
|
// (the three recip* values are 31 bits each (ignores sign bit so we can
|
|
// get a -1 error from MSG_ReadLong() ... ), allowing for 93 clients.)
|
|
assert( sv_maxclients->integer < 93 );
|
|
|
|
// decide who needs this VoIP packet sent to them...
|
|
for (i = 0, client = svs.clients; i < sv_maxclients->integer ; i++, client++) {
|
|
if (client->state != CS_ACTIVE)
|
|
continue; // not in the game yet, don't send to this guy.
|
|
else if (i == sender)
|
|
continue; // don't send voice packet back to original author.
|
|
else if (!client->hasVoip)
|
|
continue; // no VoIP support, or support disabled.
|
|
else if (client->muteAllVoip)
|
|
continue; // client is ignoring everyone.
|
|
else if (client->ignoreVoipFromClient[sender])
|
|
continue; // client is ignoring this talker.
|
|
else if (*cl->downloadName) // !!! FIXME: possible to DoS?
|
|
continue; // no VoIP allowed if downloading, to save bandwidth.
|
|
else if ( ((i >= 0) && (i < 31)) && ((recip1 & (1 << (i-0))) == 0) )
|
|
continue; // not addressed to this player.
|
|
else if ( ((i >= 31) && (i < 62)) && ((recip2 & (1 << (i-31))) == 0) )
|
|
continue; // not addressed to this player.
|
|
else if ( ((i >= 62) && (i < 93)) && ((recip3 & (1 << (i-62))) == 0) )
|
|
continue; // not addressed to this player.
|
|
|
|
// Transmit this packet to the client.
|
|
// !!! FIXME: I don't like this queueing system.
|
|
if (client->queuedVoipPackets >= (sizeof (client->voipPacket) / sizeof (client->voipPacket[0]))) {
|
|
Com_Printf("Too many VoIP packets queued for client #%d\n", i);
|
|
continue; // no room for another packet right now.
|
|
}
|
|
|
|
packet = &client->voipPacket[client->queuedVoipPackets];
|
|
packet->sender = sender;
|
|
packet->frames = frames;
|
|
packet->len = packetsize;
|
|
packet->generation = generation;
|
|
packet->sequence = sequence;
|
|
memcpy(packet->data, encoded, packetsize);
|
|
client->queuedVoipPackets++;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
|
|
|
|
/*
|
|
===========================================================================
|
|
|
|
USER CMD EXECUTION
|
|
|
|
===========================================================================
|
|
*/
|
|
|
|
/*
|
|
===================
|
|
SV_ExecuteClientMessage
|
|
|
|
Parse a client packet
|
|
===================
|
|
*/
|
|
void SV_ExecuteClientMessage( client_t *cl, msg_t *msg ) {
|
|
int c;
|
|
int serverId;
|
|
|
|
MSG_Bitstream(msg);
|
|
|
|
serverId = MSG_ReadLong( msg );
|
|
cl->messageAcknowledge = MSG_ReadLong( msg );
|
|
|
|
if (cl->messageAcknowledge < 0) {
|
|
// usually only hackers create messages like this
|
|
// it is more annoying for them to let them hanging
|
|
#ifndef NDEBUG
|
|
SV_DropClient( cl, "DEBUG: illegible client message" );
|
|
#endif
|
|
return;
|
|
}
|
|
|
|
cl->reliableAcknowledge = MSG_ReadLong( msg );
|
|
|
|
// NOTE: when the client message is fux0red the acknowledgement numbers
|
|
// can be out of range, this could cause the server to send thousands of server
|
|
// commands which the server thinks are not yet acknowledged in SV_UpdateServerCommandsToClient
|
|
if (cl->reliableAcknowledge < cl->reliableSequence - MAX_RELIABLE_COMMANDS) {
|
|
// usually only hackers create messages like this
|
|
// it is more annoying for them to let them hanging
|
|
#ifndef NDEBUG
|
|
SV_DropClient( cl, "DEBUG: illegible client message" );
|
|
#endif
|
|
cl->reliableAcknowledge = cl->reliableSequence;
|
|
return;
|
|
}
|
|
// if this is a usercmd from a previous gamestate,
|
|
// ignore it or retransmit the current gamestate
|
|
//
|
|
// if the client was downloading, let it stay at whatever serverId and
|
|
// gamestate it was at. This allows it to keep downloading even when
|
|
// the gamestate changes. After the download is finished, we'll
|
|
// notice and send it a new game state
|
|
//
|
|
// https://zerowing.idsoftware.com/bugzilla/show_bug.cgi?id=536
|
|
// don't drop as long as previous command was a nextdl, after a dl is done, downloadName is set back to ""
|
|
// but we still need to read the next message to move to next download or send gamestate
|
|
// I don't like this hack though, it must have been working fine at some point, suspecting the fix is somewhere else
|
|
if ( serverId != sv.serverId && !*cl->downloadName && !strstr(cl->lastClientCommandString, "nextdl") ) {
|
|
if ( serverId >= sv.restartedServerId && serverId < sv.serverId ) { // TTimo - use a comparison here to catch multiple map_restart
|
|
// they just haven't caught the map_restart yet
|
|
Com_DPrintf("%s : ignoring pre map_restart / outdated client message\n", cl->name);
|
|
return;
|
|
}
|
|
// if we can tell that the client has dropped the last
|
|
// gamestate we sent them, resend it
|
|
if ( cl->messageAcknowledge > cl->gamestateMessageNum ) {
|
|
Com_DPrintf( "%s : dropped gamestate, resending\n", cl->name );
|
|
SV_SendClientGameState( cl );
|
|
}
|
|
return;
|
|
}
|
|
|
|
// this client has acknowledged the new gamestate so it's
|
|
// safe to start sending it the real time again
|
|
if( cl->oldServerTime && serverId == sv.serverId ){
|
|
Com_DPrintf( "%s acknowledged gamestate\n", cl->name );
|
|
cl->oldServerTime = 0;
|
|
}
|
|
|
|
// read optional clientCommand strings
|
|
do {
|
|
c = MSG_ReadByte( msg );
|
|
|
|
// See if this is an extension command after the EOF, which means we
|
|
// got data that a legacy server should ignore.
|
|
if ((c == clc_EOF) && (MSG_LookaheadByte( msg ) == clc_extension)) {
|
|
MSG_ReadByte( msg ); // throw the clc_extension byte away.
|
|
c = MSG_ReadByte( msg ); // something legacy servers can't do!
|
|
// sometimes you get a clc_extension at end of stream...dangling
|
|
// bits in the huffman decoder giving a bogus value?
|
|
if (c == -1) {
|
|
c = clc_EOF;
|
|
}
|
|
}
|
|
|
|
if ( c == clc_EOF ) {
|
|
break;
|
|
}
|
|
|
|
if ( c != clc_clientCommand ) {
|
|
break;
|
|
}
|
|
if ( !SV_ClientCommand( cl, msg ) ) {
|
|
return; // we couldn't execute it because of the flood protection
|
|
}
|
|
if (cl->state == CS_ZOMBIE) {
|
|
return; // disconnect command
|
|
}
|
|
} while ( 1 );
|
|
|
|
// read the usercmd_t
|
|
if ( c == clc_move ) {
|
|
SV_UserMove( cl, msg, qtrue );
|
|
} else if ( c == clc_moveNoDelta ) {
|
|
SV_UserMove( cl, msg, qfalse );
|
|
} else if ( c == clc_voip ) {
|
|
#if USE_VOIP
|
|
SV_UserVoip( cl, msg );
|
|
#endif
|
|
} else if ( c != clc_EOF ) {
|
|
Com_Printf( "WARNING: bad command byte for client %i\n", (int) (cl - svs.clients) );
|
|
}
|
|
// if ( msg->readcount != msg->cursize ) {
|
|
// Com_Printf( "WARNING: Junk at end of packet for client %i\n", cl - svs.clients );
|
|
// }
|
|
}
|