netconn.c

   1 /*
   2 Copyright (C) 1996-1997 Id Software, Inc.
   3 Copyright (C) 2002 Mathieu Olivier
   4 Copyright (C) 2003 Ashley Rose Hale (LadyHavoc)
   5
   6 This program is free software; you can redistribute it and/or
   7 modify it under the terms of the GNU General Public License
   8 as published by the Free Software Foundation; either version 2
   9 of the License, or (at your option) any later version.
  10
  11 This program is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  14
  15 See the GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with this program; if not, write to the Free Software
  19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  20
  21 */
  22
  23 #include "quakedef.h"
  24 #include "thread.h"
  25 #include "lhnet.h"
  26
  27 // for secure rcon authentication
  28 #include "hmac.h"
  29 #include "mdfour.h"
  30 #include <time.h>
  31
  32 #define QWMASTER_PORT 27000
  33 #define DPMASTER_PORT 27950
  34
  35 // note this defaults on for dedicated servers, off for listen servers
  36 cvar_t sv_public = {CVAR_SERVER, "sv_public", "0", "1: advertises this server on the master server (so that players can find it in the server browser); 0: allow direct queries only; -1: do not respond to direct queries; -2: do not allow anyone to connect; -3: already block at getchallenge level"};
  37 cvar_t sv_public_rejectreason = {CVAR_SERVER, "sv_public_rejectreason", "The server is closing.", "Rejection reason for connects when sv_public is -2"};
  38 static cvar_t sv_heartbeatperiod = {CVAR_SERVER | CVAR_SAVE, "sv_heartbeatperiod", "120", "how often to send heartbeat in seconds (only used if sv_public is 1)"};
  39 extern cvar_t sv_status_privacy;
  40
  41 static cvar_t sv_masters [] =
  42 {
  43         {CVAR_CLIENT | CVAR_SERVER | CVAR_SAVE, "sv_master1", "", "user-chosen master server 1"},
  44         {CVAR_CLIENT | CVAR_SERVER | CVAR_SAVE, "sv_master2", "", "user-chosen master server 2"},
  45         {CVAR_CLIENT | CVAR_SERVER | CVAR_SAVE, "sv_master3", "", "user-chosen master server 3"},
  46         {CVAR_CLIENT | CVAR_SERVER | CVAR_SAVE, "sv_master4", "", "user-chosen master server 4"},
  47         {CVAR_CLIENT | CVAR_SERVER, "sv_masterextra1", "dpmaster.deathmask.net", "dpmaster.deathmask.net - default master server 1 (admin: Willis)"}, // admin: Willis
  48         {CVAR_CLIENT | CVAR_SERVER, "sv_masterextra2", "dpmaster.tchr.no", "dpmaster.tchr.no - default master server 2 (admin: tChr)"}, // admin: tChr
  49         {0, NULL, NULL, NULL}
  50 };
  51
  52 #ifdef CONFIG_MENU
  53 static cvar_t sv_qwmasters [] =
  54 {
  55         {CVAR_CLIENT | CVAR_SERVER | CVAR_SAVE, "sv_qwmaster1", "", "user-chosen qwmaster server 1"},
  56         {CVAR_CLIENT | CVAR_SERVER | CVAR_SAVE, "sv_qwmaster2", "", "user-chosen qwmaster server 2"},
  57         {CVAR_CLIENT | CVAR_SERVER | CVAR_SAVE, "sv_qwmaster3", "", "user-chosen qwmaster server 3"},
  58         {CVAR_CLIENT | CVAR_SERVER | CVAR_SAVE, "sv_qwmaster4", "", "user-chosen qwmaster server 4"},
  59         {CVAR_CLIENT | CVAR_SERVER, "sv_qwmasterextra1", "master.quakeservers.net:27000", "Global master server. (admin: unknown)"},
  60         {CVAR_CLIENT | CVAR_SERVER, "sv_qwmasterextra2", "asgaard.morphos-team.net:27000", "Global master server. (admin: unknown)"},
  61         {CVAR_CLIENT | CVAR_SERVER, "sv_qwmasterextra3", "qwmaster.ocrana.de:27000", "German master server. (admin: unknown)"},
  62         {CVAR_CLIENT | CVAR_SERVER, "sv_qwmasterextra4", "qwmaster.fodquake.net:27000", "Global master server. (admin: unknown)"},
  63         {0, NULL, NULL, NULL}
  64 };
  65 #endif
  66
  67 static double nextheartbeattime = 0;
  68
  69 sizebuf_t cl_message;
  70 sizebuf_t sv_message;
  71 static unsigned char cl_message_buf[NET_MAXMESSAGE];
  72 static unsigned char sv_message_buf[NET_MAXMESSAGE];
  73 char cl_readstring[MAX_INPUTLINE];
  74 char sv_readstring[MAX_INPUTLINE];
  75
  76 cvar_t net_test = {CVAR_CLIENT | CVAR_SERVER, "net_test", "0", "internal development use only, leave it alone (usually does nothing anyway)"};
  77 cvar_t net_usesizelimit = {CVAR_SERVER, "net_usesizelimit", "2", "use packet size limiting (0: never, 1: in non-CSQC mode, 2: always)"};
  78 cvar_t net_burstreserve = {CVAR_SERVER, "net_burstreserve", "0.3", "how much of the burst time to reserve for packet size spikes"};
  79 cvar_t net_messagetimeout = {CVAR_CLIENT | CVAR_SERVER, "net_messagetimeout","300", "drops players who have not sent any packets for this many seconds"};
  80 cvar_t net_connecttimeout = {CVAR_CLIENT | CVAR_SERVER, "net_connecttimeout","15", "after requesting a connection, the client must reply within this many seconds or be dropped (cuts down on connect floods). Must be above 10 seconds."};
  81 cvar_t net_connectfloodblockingtimeout = {CVAR_SERVER, "net_connectfloodblockingtimeout", "5", "when a connection packet is received, it will block all future connect packets from that IP address for this many seconds (cuts down on connect floods). Note that this does not include retries from the same IP; these are handled earlier and let in."};
  82 cvar_t net_challengefloodblockingtimeout = {CVAR_SERVER, "net_challengefloodblockingtimeout", "0.5", "when a challenge packet is received, it will block all future challenge packets from that IP address for this many seconds (cuts down on challenge floods). DarkPlaces clients retry once per second, so this should be <= 1. Failure here may lead to connect attempts failing."};
  83 cvar_t net_getstatusfloodblockingtimeout = {CVAR_SERVER, "net_getstatusfloodblockingtimeout", "1", "when a getstatus packet is received, it will block all future getstatus packets from that IP address for this many seconds (cuts down on getstatus floods). DarkPlaces retries every 4 seconds, and qstat retries once per second, so this should be <= 1. Failure here may lead to server not showing up in the server list."};
  84 cvar_t net_sourceaddresscheck = {CVAR_CLIENT, "net_sourceaddresscheck", "1", "compare the source IP address for replies (more secure, may break some bad multihoming setups"};
  85 cvar_t hostname = {CVAR_SERVER | CVAR_SAVE, "hostname", "UNNAMED", "server message to show in server browser"};
  86 cvar_t developer_networking = {CVAR_CLIENT | CVAR_SERVER, "developer_networking", "0", "prints all received and sent packets (recommended only for debugging)"};
  87
  88 cvar_t net_fakelag = {CVAR_CLIENT, "net_fakelag","0", "lags local loopback connection by this much ping time (useful to play more fairly on your own server with people with higher pings)"};
  89 static cvar_t net_fakeloss_send = {CVAR_CLIENT, "net_fakeloss_send","0", "drops this percentage of outgoing packets, useful for testing network protocol robustness (jerky movement, prediction errors, etc)"};
  90 static cvar_t net_fakeloss_receive = {CVAR_CLIENT, "net_fakeloss_receive","0", "drops this percentage of incoming packets, useful for testing network protocol robustness (jerky movement, effects failing to start, sounds failing to play, etc)"};
  91 static cvar_t net_slist_queriespersecond = {CVAR_CLIENT, "net_slist_queriespersecond", "20", "how many server information requests to send per second"};
  92 static cvar_t net_slist_queriesperframe = {CVAR_CLIENT, "net_slist_queriesperframe", "4", "maximum number of server information requests to send each rendered frame (guards against low framerates causing problems)"};
  93 static cvar_t net_slist_timeout = {CVAR_CLIENT, "net_slist_timeout", "4", "how long to listen for a server information response before giving up"};
  94 static cvar_t net_slist_pause = {CVAR_CLIENT, "net_slist_pause", "0", "when set to 1, the server list won't update until it is set back to 0"};
  95 static cvar_t net_slist_maxtries = {CVAR_CLIENT, "net_slist_maxtries", "3", "how many times to ask the same server for information (more times gives better ping reports but takes longer)"};
  96 static cvar_t net_slist_favorites = {CVAR_CLIENT | CVAR_SAVE | CVAR_NQUSERINFOHACK, "net_slist_favorites", "", "contains a list of IP addresses and ports to always query explicitly"};
  97 static cvar_t net_tos_dscp = {CVAR_CLIENT | CVAR_SAVE, "net_tos_dscp", "32", "DiffServ Codepoint for network sockets (may need game restart to apply)"};
  98 static cvar_t gameversion = {CVAR_SERVER, "gameversion", "0", "version of game data (mod-specific) to be sent to querying clients"};
  99 static cvar_t gameversion_min = {CVAR_CLIENT | CVAR_SERVER, "gameversion_min", "-1", "minimum version of game data (mod-specific), when client and server gameversion mismatch in the server browser the server is shown as incompatible; if -1, gameversion is used alone"};
 100 static cvar_t gameversion_max = {CVAR_CLIENT | CVAR_SERVER, "gameversion_max", "-1", "maximum version of game data (mod-specific), when client and server gameversion mismatch in the server browser the server is shown as incompatible; if -1, gameversion is used alone"};
 101 static cvar_t rcon_restricted_password = {CVAR_SERVER | CVAR_PRIVATE, "rcon_restricted_password", "", "password to authenticate rcon commands in restricted mode; may be set to a string of the form user1:pass1 user2:pass2 user3:pass3 to allow multiple user accounts - the client then has to specify ONE of these combinations"};
 102 static cvar_t rcon_restricted_commands = {CVAR_SERVER, "rcon_restricted_commands", "", "allowed commands for rcon when the restricted mode password was used"};
 103 static cvar_t rcon_secure_maxdiff = {CVAR_SERVER, "rcon_secure_maxdiff", "5", "maximum time difference between rcon request and server system clock (to protect against replay attack)"};
 104 extern cvar_t rcon_secure;
 105 extern cvar_t rcon_secure_challengetimeout;
 106
 107 double masterquerytime = -1000;
 108 int masterquerycount = 0;
 109 int masterreplycount = 0;
 110 int serverquerycount = 0;
 111 int serverreplycount = 0;
 112
 113 challenge_t challenges[MAX_CHALLENGES];
 114
 115 #ifdef CONFIG_MENU
 116 /// this is only false if there are still servers left to query
 117 static qboolean serverlist_querysleep = true;
 118 static qboolean serverlist_paused = false;
 119 /// this is pushed a second or two ahead of realtime whenever a master server
 120 /// reply is received, to avoid issuing queries while master replies are still
 121 /// flooding in (which would make a mess of the ping times)
 122 static double serverlist_querywaittime = 0;
 123 #endif
 124
 125 static int cl_numsockets;
 126 static lhnetsocket_t *cl_sockets[16];
 127 static int sv_numsockets;
 128 static lhnetsocket_t *sv_sockets[16];
 129
 130 netconn_t *netconn_list = NULL;
 131 mempool_t *netconn_mempool = NULL;
 132 void *netconn_mutex = NULL;
 133
 134 cvar_t cl_netport = {CVAR_CLIENT, "cl_port", "0", "forces client to use chosen port number if not 0"};
 135 cvar_t sv_netport = {CVAR_SERVER, "port", "26000", "server port for players to connect to"};
 136 cvar_t net_address = {CVAR_CLIENT | CVAR_SERVER, "net_address", "", "network address to open ipv4 ports on (if empty, use default interfaces)"};
 137 cvar_t net_address_ipv6 = {CVAR_CLIENT | CVAR_SERVER, "net_address_ipv6", "", "network address to open ipv6 ports on (if empty, use default interfaces)"};
 138
 139 char cl_net_extresponse[NET_EXTRESPONSE_MAX][1400];
 140 int cl_net_extresponse_count = 0;
 141 int cl_net_extresponse_last = 0;
 142
 143 char sv_net_extresponse[NET_EXTRESPONSE_MAX][1400];
 144 int sv_net_extresponse_count = 0;
 145 int sv_net_extresponse_last = 0;
 146
 147 #ifdef CONFIG_MENU
 148 // ServerList interface
 149 serverlist_mask_t serverlist_andmasks[SERVERLIST_ANDMASKCOUNT];
 150 serverlist_mask_t serverlist_ormasks[SERVERLIST_ORMASKCOUNT];
 151
 152 serverlist_infofield_t serverlist_sortbyfield;
 153 int serverlist_sortflags;
 154
 155 int serverlist_viewcount = 0;
 156 unsigned short serverlist_viewlist[SERVERLIST_VIEWLISTSIZE];
 157
 158 int serverlist_maxcachecount = 0;
 159 int serverlist_cachecount = 0;
 160 serverlist_entry_t *serverlist_cache = NULL;
 161
 162 qboolean serverlist_consoleoutput;
 163
 164 static int nFavorites = 0;
 165 static lhnetaddress_t favorites[MAX_FAVORITESERVERS];
 166 static int nFavorites_idfp = 0;
 167 static char favorites_idfp[MAX_FAVORITESERVERS][FP64_SIZE+1];
 168
 169 void NetConn_UpdateFavorites(void)
 170 {
 171         const char *p;
 172         nFavorites = 0;
 173         nFavorites_idfp = 0;
 174         p = net_slist_favorites.string;
 175         while((size_t) nFavorites < sizeof(favorites) / sizeof(*favorites) && COM_ParseToken_Console(&p))
 176         {
 177                 if(com_token[0] != '[' && strlen(com_token) == FP64_SIZE && !strchr(com_token, '.'))
 178                 // currently 44 bytes, longest possible IPv6 address: 39 bytes, so this works
 179                 // (if v6 address contains port, it must start with '[')
 180                 {
 181                         strlcpy(favorites_idfp[nFavorites_idfp], com_token, sizeof(favorites_idfp[nFavorites_idfp]));
 182                         ++nFavorites_idfp;
 183                 }
 184                 else
 185                 {
 186                         if(LHNETADDRESS_FromString(&favorites[nFavorites], com_token, 26000))
 187                                 ++nFavorites;
 188                 }
 189         }
 190 }
 191
 192 /// helper function to insert a value into the viewset
 193 /// spare entries will be removed
 194 static void _ServerList_ViewList_Helper_InsertBefore( int index, serverlist_entry_t *entry )
 195 {
 196     int i;
 197         if( serverlist_viewcount < SERVERLIST_VIEWLISTSIZE ) {
 198                 i = serverlist_viewcount++;
 199         } else {
 200                 i = SERVERLIST_VIEWLISTSIZE - 1;
 201         }
 202
 203         for( ; i > index ; i-- )
 204                 serverlist_viewlist[ i ] = serverlist_viewlist[ i - 1 ];
 205
 206         serverlist_viewlist[index] = (int)(entry - serverlist_cache);
 207 }
 208
 209 /// we suppose serverlist_viewcount to be valid, ie > 0
 210 static void _ServerList_ViewList_Helper_Remove( int index )
 211 {
 212         serverlist_viewcount--;
 213         for( ; index < serverlist_viewcount ; index++ )
 214                 serverlist_viewlist[index] = serverlist_viewlist[index + 1];
 215 }
 216
 217 /// \returns true if A should be inserted before B
 218 static qboolean _ServerList_Entry_Compare( serverlist_entry_t *A, serverlist_entry_t *B )
 219 {
 220         int result = 0; // > 0 if for numbers A > B and for text if A < B
 221
 222         if( serverlist_sortflags & SLSF_CATEGORIES )
 223         {
 224                 result = A->info.category - B->info.category;
 225                 if (result != 0)
 226                         return result < 0;
 227         }
 228
 229         if( serverlist_sortflags & SLSF_FAVORITES )
 230         {
 231                 if(A->info.isfavorite != B->info.isfavorite)
 232                         return A->info.isfavorite;
 233         }
 234
 235         switch( serverlist_sortbyfield ) {
 236                 case SLIF_PING:
 237                         result = A->info.ping - B->info.ping;
 238                         break;
 239                 case SLIF_MAXPLAYERS:
 240                         result = A->info.maxplayers - B->info.maxplayers;
 241                         break;
 242                 case SLIF_NUMPLAYERS:
 243                         result = A->info.numplayers - B->info.numplayers;
 244                         break;
 245                 case SLIF_NUMBOTS:
 246                         result = A->info.numbots - B->info.numbots;
 247                         break;
 248                 case SLIF_NUMHUMANS:
 249                         result = A->info.numhumans - B->info.numhumans;
 250                         break;
 251                 case SLIF_FREESLOTS:
 252                         result = A->info.freeslots - B->info.freeslots;
 253                         break;
 254                 case SLIF_PROTOCOL:
 255                         result = A->info.protocol - B->info.protocol;
 256                         break;
 257                 case SLIF_CNAME:
 258                         result = strcmp( B->info.cname, A->info.cname );
 259                         break;
 260                 case SLIF_GAME:
 261                         result = strcasecmp( B->info.game, A->info.game );
 262                         break;
 263                 case SLIF_MAP:
 264                         result = strcasecmp( B->info.map, A->info.map );
 265                         break;
 266                 case SLIF_MOD:
 267                         result = strcasecmp( B->info.mod, A->info.mod );
 268                         break;
 269                 case SLIF_NAME:
 270                         result = strcasecmp( B->info.name, A->info.name );
 271                         break;
 272                 case SLIF_QCSTATUS:
 273                         result = strcasecmp( B->info.qcstatus, A->info.qcstatus ); // not really THAT useful, though
 274                         break;
 275                 case SLIF_CATEGORY:
 276                         result = A->info.category - B->info.category;
 277                         break;
 278                 case SLIF_ISFAVORITE:
 279                         result = !!B->info.isfavorite - !!A->info.isfavorite;
 280                         break;
 281                 default:
 282                         Con_DPrint( "_ServerList_Entry_Compare: Bad serverlist_sortbyfield!\n" );
 283                         break;
 284         }
 285
 286         if (result != 0)
 287         {
 288                 if( serverlist_sortflags & SLSF_DESCENDING )
 289                         return result > 0;
 290                 else
 291                         return result < 0;
 292         }
 293
 294         // if the chosen sort key is identical, sort by index
 295         // (makes this a stable sort, so that later replies from servers won't
 296         //  shuffle the servers around when they have the same ping)
 297         return A < B;
 298 }
 299
 300 static qboolean _ServerList_CompareInt( int A, serverlist_maskop_t op, int B )
 301 {
 302         // This should actually be done with some intermediate and end-of-function return
 303         switch( op ) {
 304                 case SLMO_LESS:
 305                         return A < B;
 306                 case SLMO_LESSEQUAL:
 307                         return A <= B;
 308                 case SLMO_EQUAL:
 309                         return A == B;
 310                 case SLMO_GREATER:
 311                         return A > B;
 312                 case SLMO_NOTEQUAL:
 313                         return A != B;
 314                 case SLMO_GREATEREQUAL:
 315                 case SLMO_CONTAINS:
 316                 case SLMO_NOTCONTAIN:
 317                 case SLMO_STARTSWITH:
 318                 case SLMO_NOTSTARTSWITH:
 319                         return A >= B;
 320                 default:
 321                         Con_DPrint( "_ServerList_CompareInt: Bad op!\n" );
 322                         return false;
 323         }
 324 }
 325
 326 static qboolean _ServerList_CompareStr( const char *A, serverlist_maskop_t op, const char *B )
 327 {
 328         int i;
 329         char bufferA[ 1400 ], bufferB[ 1400 ]; // should be more than enough
 330         COM_StringDecolorize(A, 0, bufferA, sizeof(bufferA), false);
 331         for (i = 0;i < (int)sizeof(bufferA)-1 && bufferA[i];i++)
 332                 bufferA[i] = (bufferA[i] >= 'A' && bufferA[i] <= 'Z') ? (bufferA[i] + 'a' - 'A') : bufferA[i];
 333         bufferA[i] = 0;
 334         for (i = 0;i < (int)sizeof(bufferB)-1 && B[i];i++)
 335                 bufferB[i] = (B[i] >= 'A' && B[i] <= 'Z') ? (B[i] + 'a' - 'A') : B[i];
 336         bufferB[i] = 0;
 337
 338         // Same here, also using an intermediate & final return would be more appropriate
 339         // A info B mask
 340         switch( op ) {
 341                 case SLMO_CONTAINS:
 342                         return *bufferB && !!strstr( bufferA, bufferB ); // we want a real bool
 343                 case SLMO_NOTCONTAIN:
 344                         return !*bufferB || !strstr( bufferA, bufferB );
 345                 case SLMO_STARTSWITH:
 346                         //Con_Printf("startsWith: %s %s\n", bufferA, bufferB);
 347                         return *bufferB && !memcmp(bufferA, bufferB, strlen(bufferB));
 348                 case SLMO_NOTSTARTSWITH:
 349                         return !*bufferB || memcmp(bufferA, bufferB, strlen(bufferB));
 350                 case SLMO_LESS:
 351                         return strcmp( bufferA, bufferB ) < 0;
 352                 case SLMO_LESSEQUAL:
 353                         return strcmp( bufferA, bufferB ) <= 0;
 354                 case SLMO_EQUAL:
 355                         return strcmp( bufferA, bufferB ) == 0;
 356                 case SLMO_GREATER:
 357                         return strcmp( bufferA, bufferB ) > 0;
 358                 case SLMO_NOTEQUAL:
 359                         return strcmp( bufferA, bufferB ) != 0;
 360                 case SLMO_GREATEREQUAL:
 361                         return strcmp( bufferA, bufferB ) >= 0;
 362                 default:
 363                         Con_DPrint( "_ServerList_CompareStr: Bad op!\n" );
 364                         return false;
 365         }
 366 }
 367
 368 static qboolean _ServerList_Entry_Mask( serverlist_mask_t *mask, serverlist_info_t *info )
 369 {
 370         if( !_ServerList_CompareInt( info->ping, mask->tests[SLIF_PING], mask->info.ping ) )
 371                 return false;
 372         if( !_ServerList_CompareInt( info->maxplayers, mask->tests[SLIF_MAXPLAYERS], mask->info.maxplayers ) )
 373                 return false;
 374         if( !_ServerList_CompareInt( info->numplayers, mask->tests[SLIF_NUMPLAYERS], mask->info.numplayers ) )
 375                 return false;
 376         if( !_ServerList_CompareInt( info->numbots, mask->tests[SLIF_NUMBOTS], mask->info.numbots ) )
 377                 return false;
 378         if( !_ServerList_CompareInt( info->numhumans, mask->tests[SLIF_NUMHUMANS], mask->info.numhumans ) )
 379                 return false;
 380         if( !_ServerList_CompareInt( info->freeslots, mask->tests[SLIF_FREESLOTS], mask->info.freeslots ) )
 381                 return false;
 382         if( !_ServerList_CompareInt( info->protocol, mask->tests[SLIF_PROTOCOL], mask->info.protocol ))
 383                 return false;
 384         if( *mask->info.cname
 385                 && !_ServerList_CompareStr( info->cname, mask->tests[SLIF_CNAME], mask->info.cname ) )
 386                 return false;
 387         if( *mask->info.game
 388                 && !_ServerList_CompareStr( info->game, mask->tests[SLIF_GAME], mask->info.game ) )
 389                 return false;
 390         if( *mask->info.mod
 391                 && !_ServerList_CompareStr( info->mod, mask->tests[SLIF_MOD], mask->info.mod ) )
 392                 return false;
 393         if( *mask->info.map
 394                 && !_ServerList_CompareStr( info->map, mask->tests[SLIF_MAP], mask->info.map ) )
 395                 return false;
 396         if( *mask->info.name
 397                 && !_ServerList_CompareStr( info->name, mask->tests[SLIF_NAME], mask->info.name ) )
 398                 return false;
 399         if( *mask->info.qcstatus
 400                 && !_ServerList_CompareStr( info->qcstatus, mask->tests[SLIF_QCSTATUS], mask->info.qcstatus ) )
 401                 return false;
 402         if( *mask->info.players
 403                 && !_ServerList_CompareStr( info->players, mask->tests[SLIF_PLAYERS], mask->info.players ) )
 404                 return false;
 405         if( !_ServerList_CompareInt( info->category, mask->tests[SLIF_CATEGORY], mask->info.category ) )
 406                 return false;
 407         if( !_ServerList_CompareInt( info->isfavorite, mask->tests[SLIF_ISFAVORITE], mask->info.isfavorite ))
 408                 return false;
 409         return true;
 410 }
 411
 412 static void ServerList_ViewList_Insert( serverlist_entry_t *entry )
 413 {
 414         int start, end, mid, i;
 415         lhnetaddress_t addr;
 416
 417         // reject incompatible servers
 418         if(
 419                 entry->info.gameversion != gameversion.integer
 420                 &&
 421                 !(
 422                            gameversion_min.integer >= 0 // min/max range set by user/mod?
 423                         && gameversion_max.integer >= 0
 424                         && gameversion_min.integer <= entry->info.gameversion // version of server in min/max range?
 425                         && gameversion_max.integer >= entry->info.gameversion
 426                  )
 427         )
 428                 return;
 429
 430         // refresh the "favorite" status
 431         entry->info.isfavorite = false;
 432         if(LHNETADDRESS_FromString(&addr, entry->info.cname, 26000))
 433         {
 434                 char idfp[FP64_SIZE+1];
 435                 for(i = 0; i < nFavorites; ++i)
 436                 {
 437                         if(LHNETADDRESS_Compare(&addr, &favorites[i]) == 0)
 438                         {
 439                                 entry->info.isfavorite = true;
 440                                 break;
 441                         }
 442                 }
 443                 if(Crypto_RetrieveHostKey(&addr, 0, NULL, 0, idfp, sizeof(idfp), NULL, NULL))
 444                 {
 445                         for(i = 0; i < nFavorites_idfp; ++i)
 446                         {
 447                                 if(!strcmp(idfp, favorites_idfp[i]))
 448                                 {
 449                                         entry->info.isfavorite = true;
 450                                         break;
 451                                 }
 452                         }
 453                 }
 454         }
 455
 456         // refresh the "category"
 457         entry->info.category = MR_GetServerListEntryCategory(entry);
 458
 459         // FIXME: change this to be more readable (...)
 460         // now check whether it passes through the masks
 461         for( start = 0 ; start < SERVERLIST_ANDMASKCOUNT && serverlist_andmasks[start].active; start++ )
 462                 if( !_ServerList_Entry_Mask( &serverlist_andmasks[start], &entry->info ) )
 463                         return;
 464
 465         for( start = 0 ; start < SERVERLIST_ORMASKCOUNT && serverlist_ormasks[start].active ; start++ )
 466                 if( _ServerList_Entry_Mask( &serverlist_ormasks[start], &entry->info ) )
 467                         break;
 468         if( start == SERVERLIST_ORMASKCOUNT || (start > 0 && !serverlist_ormasks[start].active) )
 469                 return;
 470
 471         if( !serverlist_viewcount ) {
 472                 _ServerList_ViewList_Helper_InsertBefore( 0, entry );
 473                 return;
 474         }
 475         // ok, insert it, we just need to find out where exactly:
 476
 477         // two special cases
 478         // check whether to insert it as new first item
 479         if( _ServerList_Entry_Compare( entry, ServerList_GetViewEntry(0) ) ) {
 480                 _ServerList_ViewList_Helper_InsertBefore( 0, entry );
 481                 return;
 482         } // check whether to insert it as new last item
 483         else if( !_ServerList_Entry_Compare( entry, ServerList_GetViewEntry(serverlist_viewcount - 1) ) ) {
 484                 _ServerList_ViewList_Helper_InsertBefore( serverlist_viewcount, entry );
 485                 return;
 486         }
 487         start = 0;
 488         end = serverlist_viewcount - 1;
 489         while( end > start + 1 )
 490         {
 491                 mid = (start + end) / 2;
 492                 // test the item that lies in the middle between start and end
 493                 if( _ServerList_Entry_Compare( entry, ServerList_GetViewEntry(mid) ) )
 494                         // the item has to be in the upper half
 495                         end = mid;
 496                 else
 497                         // the item has to be in the lower half
 498                         start = mid;
 499         }
 500         _ServerList_ViewList_Helper_InsertBefore( start + 1, entry );
 501 }
 502
 503 static void ServerList_ViewList_Remove( serverlist_entry_t *entry )
 504 {
 505         int i;
 506         for( i = 0; i < serverlist_viewcount; i++ )
 507         {
 508                 if (ServerList_GetViewEntry(i) == entry)
 509                 {
 510                         _ServerList_ViewList_Helper_Remove(i);
 511                         break;
 512                 }
 513         }
 514 }
 515
 516 void ServerList_RebuildViewList(void)
 517 {
 518         int i;
 519
 520         serverlist_viewcount = 0;
 521         for( i = 0 ; i < serverlist_cachecount ; i++ ) {
 522                 serverlist_entry_t *entry = &serverlist_cache[i];
 523                 // also display entries that are currently being refreshed [11/8/2007 Black]
 524                 if( entry->query == SQS_QUERIED || entry->query == SQS_REFRESHING )
 525                         ServerList_ViewList_Insert( entry );
 526         }
 527 }
 528
 529 void ServerList_ResetMasks(void)
 530 {
 531         int i;
 532
 533         memset( &serverlist_andmasks, 0, sizeof( serverlist_andmasks ) );
 534         memset( &serverlist_ormasks, 0, sizeof( serverlist_ormasks ) );
 535         // numbots needs to be compared to -1 to always succeed
 536         for(i = 0; i < SERVERLIST_ANDMASKCOUNT; ++i)
 537                 serverlist_andmasks[i].info.numbots = -1;
 538         for(i = 0; i < SERVERLIST_ORMASKCOUNT; ++i)
 539                 serverlist_ormasks[i].info.numbots = -1;
 540 }
 541
 542 void ServerList_GetPlayerStatistics(int *numplayerspointer, int *maxplayerspointer)
 543 {
 544         int i;
 545         int numplayers = 0, maxplayers = 0;
 546         for (i = 0;i < serverlist_cachecount;i++)
 547         {
 548                 if (serverlist_cache[i].query == SQS_QUERIED)
 549                 {
 550                         numplayers += serverlist_cache[i].info.numhumans;
 551                         maxplayers += serverlist_cache[i].info.maxplayers;
 552                 }
 553         }
 554         *numplayerspointer = numplayers;
 555         *maxplayerspointer = maxplayers;
 556 }
 557
 558 #if 0
 559 static void _ServerList_Test(void)
 560 {
 561         int i;
 562         if (serverlist_maxcachecount <= 1024)
 563         {
 564                 serverlist_maxcachecount = 1024;
 565                 serverlist_cache = (serverlist_entry_t *)Mem_Realloc(netconn_mempool, (void *)serverlist_cache, sizeof(serverlist_entry_t) * serverlist_maxcachecount);
 566         }
 567         for( i = 0 ; i < 1024 ; i++ ) {
 568                 memset( &serverlist_cache[serverlist_cachecount], 0, sizeof( serverlist_entry_t ) );
 569                 serverlist_cache[serverlist_cachecount].info.ping = 1000 + 1024 - i;
 570                 dpsnprintf( serverlist_cache[serverlist_cachecount].info.name, sizeof(serverlist_cache[serverlist_cachecount].info.name), "Black's ServerList Test %i", i );
 571                 serverlist_cache[serverlist_cachecount].finished = true;
 572                 dpsnprintf( serverlist_cache[serverlist_cachecount].line1, sizeof(serverlist_cache[serverlist_cachecount].info.line1), "%i %s", serverlist_cache[serverlist_cachecount].info.ping, serverlist_cache[serverlist_cachecount].info.name );
 573                 ServerList_ViewList_Insert( &serverlist_cache[serverlist_cachecount] );
 574                 serverlist_cachecount++;
 575         }
 576 }
 577 #endif
 578
 579 void ServerList_QueryList(qboolean resetcache, qboolean querydp, qboolean queryqw, qboolean consoleoutput)
 580 {
 581         masterquerytime = realtime;
 582         masterquerycount = 0;
 583         masterreplycount = 0;
 584         if( resetcache ) {
 585                 serverquerycount = 0;
 586                 serverreplycount = 0;
 587                 serverlist_cachecount = 0;
 588                 serverlist_viewcount = 0;
 589                 serverlist_maxcachecount = 0;
 590                 serverlist_cache = (serverlist_entry_t *)Mem_Realloc(netconn_mempool, (void *)serverlist_cache, sizeof(serverlist_entry_t) * serverlist_maxcachecount);
 591         } else {
 592                 // refresh all entries
 593                 int n;
 594                 for( n = 0 ; n < serverlist_cachecount ; n++ ) {
 595                         serverlist_entry_t *entry = &serverlist_cache[ n ];
 596                         entry->query = SQS_REFRESHING;
 597                         entry->querycounter = 0;
 598                 }
 599         }
 600         serverlist_consoleoutput = consoleoutput;
 601
 602         //_ServerList_Test();
 603
 604         NetConn_QueryMasters(querydp, queryqw);
 605 }
 606 #endif
 607
 608 // rest
 609
 610 int NetConn_Read(lhnetsocket_t *mysocket, void *data, int maxlength, lhnetaddress_t *peeraddress)
 611 {
 612         int length;
 613         int i;
 614         if (mysocket->address.addresstype == LHNETADDRESSTYPE_LOOP && netconn_mutex)
 615                 Thread_LockMutex(netconn_mutex);
 616         length = LHNET_Read(mysocket, data, maxlength, peeraddress);
 617         if (mysocket->address.addresstype == LHNETADDRESSTYPE_LOOP && netconn_mutex)
 618                 Thread_UnlockMutex(netconn_mutex);
 619         if (length == 0)
 620                 return 0;
 621         if (net_fakeloss_receive.integer)
 622                 for (i = 0;i < cl_numsockets;i++)
 623                         if (cl_sockets[i] == mysocket && (rand() % 100) < net_fakeloss_receive.integer)
 624                                 return 0;
 625         if (developer_networking.integer)
 626         {
 627                 char addressstring[128], addressstring2[128];
 628                 LHNETADDRESS_ToString(LHNET_AddressFromSocket(mysocket), addressstring, sizeof(addressstring), true);
 629                 if (length > 0)
 630                 {
 631                         LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
 632                         Con_Printf("LHNET_Read(%p (%s), %p, %i, %p) = %i from %s:\n", (void *)mysocket, addressstring, (void *)data, maxlength, (void *)peeraddress, length, addressstring2);
 633                         Com_HexDumpToConsole((unsigned char *)data, length);
 634                 }
 635                 else
 636                         Con_Printf("LHNET_Read(%p (%s), %p, %i, %p) = %i\n", (void *)mysocket, addressstring, (void *)data, maxlength, (void *)peeraddress, length);
 637         }
 638         return length;
 639 }
 640
 641 int NetConn_Write(lhnetsocket_t *mysocket, const void *data, int length, const lhnetaddress_t *peeraddress)
 642 {
 643         int ret;
 644         int i;
 645         if (net_fakeloss_send.integer)
 646                 for (i = 0;i < cl_numsockets;i++)
 647                         if (cl_sockets[i] == mysocket && (rand() % 100) < net_fakeloss_send.integer)
 648                                 return length;
 649         if (mysocket->address.addresstype == LHNETADDRESSTYPE_LOOP && netconn_mutex)
 650                 Thread_LockMutex(netconn_mutex);
 651         ret = LHNET_Write(mysocket, data, length, peeraddress);
 652         if (mysocket->address.addresstype == LHNETADDRESSTYPE_LOOP && netconn_mutex)
 653                 Thread_UnlockMutex(netconn_mutex);
 654         if (developer_networking.integer)
 655         {
 656                 char addressstring[128], addressstring2[128];
 657                 LHNETADDRESS_ToString(LHNET_AddressFromSocket(mysocket), addressstring, sizeof(addressstring), true);
 658                 LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
 659                 Con_Printf("LHNET_Write(%p (%s), %p, %i, %p (%s)) = %i%s\n", (void *)mysocket, addressstring, (void *)data, length, (void *)peeraddress, addressstring2, length, ret == length ? "" : " (ERROR)");
 660                 Com_HexDumpToConsole((unsigned char *)data, length);
 661         }
 662         return ret;
 663 }
 664
 665 int NetConn_WriteString(lhnetsocket_t *mysocket, const char *string, const lhnetaddress_t *peeraddress)
 666 {
 667         // note this does not include the trailing NULL because we add that in the parser
 668         return NetConn_Write(mysocket, string, (int)strlen(string), peeraddress);
 669 }
 670
 671 qboolean NetConn_CanSend(netconn_t *conn)
 672 {
 673         conn->outgoing_packetcounter = (conn->outgoing_packetcounter + 1) % NETGRAPH_PACKETS;
 674         conn->outgoing_netgraph[conn->outgoing_packetcounter].time            = realtime;
 675         conn->outgoing_netgraph[conn->outgoing_packetcounter].unreliablebytes = NETGRAPH_NOPACKET;
 676         conn->outgoing_netgraph[conn->outgoing_packetcounter].reliablebytes   = NETGRAPH_NOPACKET;
 677         conn->outgoing_netgraph[conn->outgoing_packetcounter].ackbytes        = NETGRAPH_NOPACKET;
 678         conn->outgoing_netgraph[conn->outgoing_packetcounter].cleartime       = conn->cleartime;
 679         if (realtime > conn->cleartime)
 680                 return true;
 681         else
 682         {
 683                 conn->outgoing_netgraph[conn->outgoing_packetcounter].unreliablebytes = NETGRAPH_CHOKEDPACKET;
 684                 return false;
 685         }
 686 }
 687
 688 static void NetConn_UpdateCleartime(double *cleartime, int rate, int burstsize, int len)
 689 {
 690         double bursttime = burstsize / (double)rate;
 691
 692         // delay later packets to obey rate limit
 693         if (*cleartime < realtime - bursttime)
 694                 *cleartime = realtime - bursttime;
 695         *cleartime = *cleartime + len / (double)rate;
 696
 697         // limit bursts to one packet in size ("dialup mode" emulating old behaviour)
 698         if (net_test.integer)
 699         {
 700                 if (*cleartime < realtime)
 701                         *cleartime = realtime;
 702         }
 703 }
 704
 705 static int NetConn_AddCryptoFlag(crypto_t *crypto)
 706 {
 707         // HACK: if an encrypted connection is used, randomly set some unused
 708         // flags. When AES encryption is enabled, that will make resends differ
 709         // from the original, so that e.g. substring filters in a router/IPS
 710         // are unlikely to match a second time. See also "startkeylogger".
 711         int flag = 0;
 712         if (crypto->authenticated)
 713         {
 714                 // Let's always set at least one of the bits.
 715                 int r = rand() % 7 + 1;
 716                 if (r & 1)
 717                         flag |= NETFLAG_CRYPTO0;
 718                 if (r & 2)
 719                         flag |= NETFLAG_CRYPTO1;
 720                 if (r & 4)
 721                         flag |= NETFLAG_CRYPTO2;
 722         }
 723         return flag;
 724 }
 725
 726 int NetConn_SendUnreliableMessage(netconn_t *conn, sizebuf_t *data, protocolversion_t protocol, int rate, int burstsize, qboolean quakesignon_suppressreliables)
 727 {
 728         int totallen = 0;
 729         unsigned char sendbuffer[NET_HEADERSIZE+NET_MAXMESSAGE];
 730         unsigned char cryptosendbuffer[NET_HEADERSIZE+NET_MAXMESSAGE+CRYPTO_HEADERSIZE];
 731
 732         // if this packet was supposedly choked, but we find ourselves sending one
 733         // anyway, make sure the size counting starts at zero
 734         // (this mostly happens on level changes and disconnects and such)
 735         if (conn->outgoing_netgraph[conn->outgoing_packetcounter].unreliablebytes == NETGRAPH_CHOKEDPACKET)
 736                 conn->outgoing_netgraph[conn->outgoing_packetcounter].unreliablebytes = NETGRAPH_NOPACKET;
 737
 738         conn->outgoing_netgraph[conn->outgoing_packetcounter].cleartime = conn->cleartime;
 739
 740         if (protocol == PROTOCOL_QUAKEWORLD)
 741         {
 742                 int packetLen;
 743                 qboolean sendreliable;
 744
 745                 // note that it is ok to send empty messages to the qw server,
 746                 // otherwise it won't respond to us at all
 747
 748                 sendreliable = false;
 749                 // if the remote side dropped the last reliable message, resend it
 750                 if (conn->qw.incoming_acknowledged > conn->qw.last_reliable_sequence && conn->qw.incoming_reliable_acknowledged != conn->qw.reliable_sequence)
 751                         sendreliable = true;
 752                 // if the reliable transmit buffer is empty, copy the current message out
 753                 if (!conn->sendMessageLength && conn->message.cursize)
 754                 {
 755                         memcpy (conn->sendMessage, conn->message.data, conn->message.cursize);
 756                         conn->sendMessageLength = conn->message.cursize;
 757                         SZ_Clear(&conn->message); // clear the message buffer
 758                         conn->qw.reliable_sequence ^= 1;
 759                         sendreliable = true;
 760                 }
 761                 // outgoing unreliable packet number, and outgoing reliable packet number (0 or 1)
 762                 StoreLittleLong(sendbuffer, conn->outgoing_unreliable_sequence | (((unsigned int)sendreliable)<<31));
 763                 // last received unreliable packet number, and last received reliable packet number (0 or 1)
 764                 StoreLittleLong(sendbuffer + 4, conn->qw.incoming_sequence | (((unsigned int)conn->qw.incoming_reliable_sequence)<<31));
 765                 packetLen = 8;
 766                 conn->outgoing_unreliable_sequence++;
 767                 // client sends qport in every packet
 768                 if (conn == cls.netcon)
 769                 {
 770                         *((short *)(sendbuffer + 8)) = LittleShort(cls.qw_qport);
 771                         packetLen += 2;
 772                         // also update cls.qw_outgoing_sequence
 773                         cls.qw_outgoing_sequence = conn->outgoing_unreliable_sequence;
 774                 }
 775                 if (packetLen + (sendreliable ? conn->sendMessageLength : 0) > 1400)
 776                 {
 777                         Con_Printf ("NetConn_SendUnreliableMessage: reliable message too big %u\n", data->cursize);
 778                         return -1;
 779                 }
 780
 781                 conn->outgoing_netgraph[conn->outgoing_packetcounter].unreliablebytes += packetLen + 28;
 782
 783                 // add the reliable message if there is one
 784                 if (sendreliable)
 785                 {
 786                         conn->outgoing_netgraph[conn->outgoing_packetcounter].reliablebytes += conn->sendMessageLength + 28;
 787                         memcpy(sendbuffer + packetLen, conn->sendMessage, conn->sendMessageLength);
 788                         packetLen += conn->sendMessageLength;
 789                         conn->qw.last_reliable_sequence = conn->outgoing_unreliable_sequence;
 790                 }
 791
 792                 // add the unreliable message if possible
 793                 if (packetLen + data->cursize <= 1400)
 794                 {
 795                         conn->outgoing_netgraph[conn->outgoing_packetcounter].unreliablebytes += data->cursize + 28;
 796                         memcpy(sendbuffer + packetLen, data->data, data->cursize);
 797                         packetLen += data->cursize;
 798                 }
 799
 800                 NetConn_Write(conn->mysocket, (void *)&sendbuffer, packetLen, &conn->peeraddress);
 801
 802                 conn->packetsSent++;
 803                 conn->unreliableMessagesSent++;
 804
 805                 totallen += packetLen + 28;
 806         }
 807         else
 808         {
 809                 unsigned int packetLen;
 810                 unsigned int dataLen;
 811                 unsigned int eom;
 812                 const void *sendme;
 813                 size_t sendmelen;
 814
 815                 // if a reliable message fragment has been lost, send it again
 816                 if (conn->sendMessageLength && (realtime - conn->lastSendTime) > 1.0)
 817                 {
 818                         if (conn->sendMessageLength <= MAX_PACKETFRAGMENT)
 819                         {
 820                                 dataLen = conn->sendMessageLength;
 821                                 eom = NETFLAG_EOM;
 822                         }
 823                         else
 824                         {
 825                                 dataLen = MAX_PACKETFRAGMENT;
 826                                 eom = 0;
 827                         }
 828
 829                         packetLen = NET_HEADERSIZE + dataLen;
 830
 831                         StoreBigLong(sendbuffer, packetLen | (NETFLAG_DATA | eom | NetConn_AddCryptoFlag(&conn->crypto)));
 832                         StoreBigLong(sendbuffer + 4, conn->nq.sendSequence - 1);
 833                         memcpy(sendbuffer + NET_HEADERSIZE, conn->sendMessage, dataLen);
 834
 835                         conn->outgoing_netgraph[conn->outgoing_packetcounter].reliablebytes += packetLen + 28;
 836
 837                         sendme = Crypto_EncryptPacket(&conn->crypto, &sendbuffer, packetLen, &cryptosendbuffer, &sendmelen, sizeof(cryptosendbuffer));
 838                         if (sendme && NetConn_Write(conn->mysocket, sendme, (int)sendmelen, &conn->peeraddress) == (int)sendmelen)
 839                         {
 840                                 conn->lastSendTime = realtime;
 841                                 conn->packetsReSent++;
 842                         }
 843
 844                         totallen += (int)sendmelen + 28;
 845                 }
 846
 847                 // if we have a new reliable message to send, do so
 848                 if (!conn->sendMessageLength && conn->message.cursize && !quakesignon_suppressreliables)
 849                 {
 850                         if (conn->message.cursize > (int)sizeof(conn->sendMessage))
 851                         {
 852                                 Con_Printf("NetConn_SendUnreliableMessage: reliable message too big (%u > %u)\n", conn->message.cursize, (int)sizeof(conn->sendMessage));
 853                                 conn->message.overflowed = true;
 854                                 return -1;
 855                         }
 856
 857                         if (developer_networking.integer && conn == cls.netcon)
 858                         {
 859                                 Con_Print("client sending reliable message to server:\n");
 860                                 SZ_HexDumpToConsole(&conn->message);
 861                         }
 862
 863                         memcpy(conn->sendMessage, conn->message.data, conn->message.cursize);
 864                         conn->sendMessageLength = conn->message.cursize;
 865                         SZ_Clear(&conn->message);
 866
 867                         if (conn->sendMessageLength <= MAX_PACKETFRAGMENT)
 868                         {
 869                                 dataLen = conn->sendMessageLength;
 870                                 eom = NETFLAG_EOM;
 871                         }
 872                         else
 873                         {
 874                                 dataLen = MAX_PACKETFRAGMENT;
 875                                 eom = 0;
 876                         }
 877
 878                         packetLen = NET_HEADERSIZE + dataLen;
 879
 880                         StoreBigLong(sendbuffer, packetLen | (NETFLAG_DATA | eom | NetConn_AddCryptoFlag(&conn->crypto)));
 881                         StoreBigLong(sendbuffer + 4, conn->nq.sendSequence);
 882                         memcpy(sendbuffer + NET_HEADERSIZE, conn->sendMessage, dataLen);
 883
 884                         conn->nq.sendSequence++;
 885
 886                         conn->outgoing_netgraph[conn->outgoing_packetcounter].reliablebytes += packetLen + 28;
 887
 888                         sendme = Crypto_EncryptPacket(&conn->crypto, &sendbuffer, packetLen, &cryptosendbuffer, &sendmelen, sizeof(cryptosendbuffer));
 889                         if(sendme)
 890                                 NetConn_Write(conn->mysocket, sendme, (int)sendmelen, &conn->peeraddress);
 891
 892                         conn->lastSendTime = realtime;
 893                         conn->packetsSent++;
 894                         conn->reliableMessagesSent++;
 895
 896                         totallen += (int)sendmelen + 28;
 897                 }
 898
 899                 // if we have an unreliable message to send, do so
 900                 if (data->cursize)
 901                 {
 902                         packetLen = NET_HEADERSIZE + data->cursize;
 903
 904                         if (packetLen > (int)sizeof(sendbuffer))
 905                         {
 906                                 Con_Printf("NetConn_SendUnreliableMessage: message too big %u\n", data->cursize);
 907                                 return -1;
 908                         }
 909
 910                         StoreBigLong(sendbuffer, packetLen | NETFLAG_UNRELIABLE | NetConn_AddCryptoFlag(&conn->crypto));
 911                         StoreBigLong(sendbuffer + 4, conn->outgoing_unreliable_sequence);
 912                         memcpy(sendbuffer + NET_HEADERSIZE, data->data, data->cursize);
 913
 914                         conn->outgoing_unreliable_sequence++;
 915
 916                         conn->outgoing_netgraph[conn->outgoing_packetcounter].unreliablebytes += packetLen + 28;
 917
 918                         sendme = Crypto_EncryptPacket(&conn->crypto, &sendbuffer, packetLen, &cryptosendbuffer, &sendmelen, sizeof(cryptosendbuffer));
 919                         if(sendme)
 920                                 NetConn_Write(conn->mysocket, sendme, (int)sendmelen, &conn->peeraddress);
 921
 922                         conn->packetsSent++;
 923                         conn->unreliableMessagesSent++;
 924
 925                         totallen += (int)sendmelen + 28;
 926                 }
 927         }
 928
 929         NetConn_UpdateCleartime(&conn->cleartime, rate, burstsize, totallen);
 930
 931         return 0;
 932 }
 933
 934 qboolean NetConn_HaveClientPorts(void)
 935 {
 936         return !!cl_numsockets;
 937 }
 938
 939 qboolean NetConn_HaveServerPorts(void)
 940 {
 941         return !!sv_numsockets;
 942 }
 943
 944 void NetConn_CloseClientPorts(void)
 945 {
 946         for (;cl_numsockets > 0;cl_numsockets--)
 947                 if (cl_sockets[cl_numsockets - 1])
 948                         LHNET_CloseSocket(cl_sockets[cl_numsockets - 1]);
 949 }
 950
 951 static void NetConn_OpenClientPort(const char *addressstring, lhnetaddresstype_t addresstype, int defaultport)
 952 {
 953         lhnetaddress_t address;
 954         lhnetsocket_t *s;
 955         int success;
 956         char addressstring2[1024];
 957         if (addressstring && addressstring[0])
 958                 success = LHNETADDRESS_FromString(&address, addressstring, defaultport);
 959         else
 960                 success = LHNETADDRESS_FromPort(&address, addresstype, defaultport);
 961         if (success)
 962         {
 963                 if ((s = LHNET_OpenSocket_Connectionless(&address)))
 964                 {
 965                         cl_sockets[cl_numsockets++] = s;
 966                         LHNETADDRESS_ToString(LHNET_AddressFromSocket(s), addressstring2, sizeof(addressstring2), true);
 967                         if (addresstype != LHNETADDRESSTYPE_LOOP)
 968                                 Con_Printf("Client opened a socket on address %s\n", addressstring2);
 969                 }
 970                 else
 971                 {
 972                         LHNETADDRESS_ToString(&address, addressstring2, sizeof(addressstring2), true);
 973                         Con_Errorf("Client failed to open a socket on address %s\n", addressstring2);
 974                 }
 975         }
 976         else
 977                 Con_Errorf("Client unable to parse address %s\n", addressstring);
 978 }
 979
 980 void NetConn_OpenClientPorts(void)
 981 {
 982         int port;
 983         NetConn_CloseClientPorts();
 984
 985         SV_LockThreadMutex(); // FIXME recursive?
 986         Crypto_LoadKeys(); // client sockets
 987         SV_UnlockThreadMutex();
 988
 989         port = bound(0, cl_netport.integer, 65535);
 990         if (cl_netport.integer != port)
 991                 Cvar_SetValueQuick(&cl_netport, port);
 992         if(port == 0)
 993                 Con_Printf("Client using an automatically assigned port\n");
 994         else
 995                 Con_Printf("Client using port %i\n", port);
 996         NetConn_OpenClientPort(NULL, LHNETADDRESSTYPE_LOOP, 2);
 997         NetConn_OpenClientPort(net_address.string, LHNETADDRESSTYPE_INET4, port);
 998 #ifndef NOSUPPORTIPV6
 999         NetConn_OpenClientPort(net_address_ipv6.string, LHNETADDRESSTYPE_INET6, port);
1000 #endif
1001 }
1002
1003 void NetConn_CloseServerPorts(void)
1004 {
1005         for (;sv_numsockets > 0;sv_numsockets--)
1006                 if (sv_sockets[sv_numsockets - 1])
1007                         LHNET_CloseSocket(sv_sockets[sv_numsockets - 1]);
1008 }
1009
1010 static qboolean NetConn_OpenServerPort(const char *addressstring, lhnetaddresstype_t addresstype, int defaultport, int range)
1011 {
1012         lhnetaddress_t address;
1013         lhnetsocket_t *s;
1014         int port;
1015         char addressstring2[1024];
1016         int success;
1017
1018         for (port = defaultport; port <= defaultport + range; port++)
1019         {
1020                 if (addressstring && addressstring[0])
1021                         success = LHNETADDRESS_FromString(&address, addressstring, port);
1022                 else
1023                         success = LHNETADDRESS_FromPort(&address, addresstype, port);
1024                 if (success)
1025                 {
1026                         if ((s = LHNET_OpenSocket_Connectionless(&address)))
1027                         {
1028                                 sv_sockets[sv_numsockets++] = s;
1029                                 LHNETADDRESS_ToString(LHNET_AddressFromSocket(s), addressstring2, sizeof(addressstring2), true);
1030                                 if (addresstype != LHNETADDRESSTYPE_LOOP)
1031                                         Con_Printf("Server listening on address %s\n", addressstring2);
1032                                 return true;
1033                         }
1034                         else
1035                         {
1036                                 LHNETADDRESS_ToString(&address, addressstring2, sizeof(addressstring2), true);
1037                                 Con_Errorf("Server failed to open socket on address %s\n", addressstring2);
1038                         }
1039                 }
1040                 else
1041                 {
1042                         Con_Errorf("Server unable to parse address %s\n", addressstring);
1043                         // if it cant parse one address, it wont be able to parse another for sure
1044                         return false;
1045                 }
1046         }
1047         return false;
1048 }
1049
1050 void NetConn_OpenServerPorts(int opennetports)
1051 {
1052         int port;
1053         NetConn_CloseServerPorts();
1054
1055         SV_LockThreadMutex(); // FIXME recursive?
1056         Crypto_LoadKeys(); // server sockets
1057         SV_UnlockThreadMutex();
1058
1059         NetConn_UpdateSockets();
1060         port = bound(0, sv_netport.integer, 65535);
1061         if (port == 0)
1062                 port = 26000;
1063         Con_Printf("Server using port %i\n", port);
1064         if (sv_netport.integer != port)
1065                 Cvar_SetValueQuick(&sv_netport, port);
1066         if (cls.state != ca_dedicated)
1067                 NetConn_OpenServerPort(NULL, LHNETADDRESSTYPE_LOOP, 1, 1);
1068         if (opennetports)
1069         {
1070 #ifndef NOSUPPORTIPV6
1071                 qboolean ip4success = NetConn_OpenServerPort(net_address.string, LHNETADDRESSTYPE_INET4, port, 100);
1072                 NetConn_OpenServerPort(net_address_ipv6.string, LHNETADDRESSTYPE_INET6, port, ip4success ? 1 : 100);
1073 #else
1074                 NetConn_OpenServerPort(net_address.string, LHNETADDRESSTYPE_INET4, port, 100);
1075 #endif
1076         }
1077         if (sv_numsockets == 0)
1078                 Host_Error("NetConn_OpenServerPorts: unable to open any ports!");
1079 }
1080
1081 lhnetsocket_t *NetConn_ChooseClientSocketForAddress(lhnetaddress_t *address)
1082 {
1083         int i, a = LHNETADDRESS_GetAddressType(address);
1084         for (i = 0;i < cl_numsockets;i++)
1085                 if (cl_sockets[i] && LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(cl_sockets[i])) == a)
1086                         return cl_sockets[i];
1087         return NULL;
1088 }
1089
1090 lhnetsocket_t *NetConn_ChooseServerSocketForAddress(lhnetaddress_t *address)
1091 {
1092         int i, a = LHNETADDRESS_GetAddressType(address);
1093         for (i = 0;i < sv_numsockets;i++)
1094                 if (sv_sockets[i] && LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(sv_sockets[i])) == a)
1095                         return sv_sockets[i];
1096         return NULL;
1097 }
1098
1099 netconn_t *NetConn_Open(lhnetsocket_t *mysocket, lhnetaddress_t *peeraddress)
1100 {
1101         netconn_t *conn;
1102         conn = (netconn_t *)Mem_Alloc(netconn_mempool, sizeof(*conn));
1103         conn->mysocket = mysocket;
1104         conn->peeraddress = *peeraddress;
1105         conn->lastMessageTime = realtime;
1106         conn->message.data = conn->messagedata;
1107         conn->message.maxsize = sizeof(conn->messagedata);
1108         conn->message.cursize = 0;
1109         // LadyHavoc: (inspired by ProQuake) use a short connect timeout to
1110         // reduce effectiveness of connection request floods
1111         conn->timeout = realtime + net_connecttimeout.value;
1112         LHNETADDRESS_ToString(&conn->peeraddress, conn->address, sizeof(conn->address), true);
1113         conn->next = netconn_list;
1114         netconn_list = conn;
1115         return conn;
1116 }
1117
1118 void NetConn_ClearFlood(lhnetaddress_t *peeraddress, server_floodaddress_t *floodlist, size_t floodlength);
1119 void NetConn_Close(netconn_t *conn)
1120 {
1121         netconn_t *c;
1122         // remove connection from list
1123
1124         // allow the client to reconnect immediately
1125         NetConn_ClearFlood(&(conn->peeraddress), sv.connectfloodaddresses, sizeof(sv.connectfloodaddresses) / sizeof(sv.connectfloodaddresses[0]));
1126
1127         if (conn == netconn_list)
1128                 netconn_list = conn->next;
1129         else
1130         {
1131                 for (c = netconn_list;c;c = c->next)
1132                 {
1133                         if (c->next == conn)
1134                         {
1135                                 c->next = conn->next;
1136                                 break;
1137                         }
1138                 }
1139                 // not found in list, we'll avoid crashing here...
1140                 if (!c)
1141                         return;
1142         }
1143         // free connection
1144         Mem_Free(conn);
1145 }
1146
1147 static int clientport = -1;
1148 static int clientport2 = -1;
1149 static int hostport = -1;
1150 void NetConn_UpdateSockets(void)
1151 {
1152         int i, j;
1153
1154         // TODO add logic to automatically close sockets if needed
1155         LHNET_DefaultDSCP(net_tos_dscp.integer);
1156
1157         if (cls.state != ca_dedicated)
1158         {
1159                 if (clientport2 != cl_netport.integer)
1160                 {
1161                         clientport2 = cl_netport.integer;
1162                         if (cls.state == ca_connected)
1163                                 Con_Print("Changing \"cl_port\" will not take effect until you reconnect.\n");
1164                 }
1165                 if (cls.state == ca_disconnected && clientport != clientport2)
1166                 {
1167                         clientport = clientport2;
1168                         NetConn_CloseClientPorts();
1169                 }
1170                 if (cl_numsockets == 0)
1171                         NetConn_OpenClientPorts();
1172         }
1173
1174         if (hostport != sv_netport.integer)
1175         {
1176                 hostport = sv_netport.integer;
1177                 if (sv.active)
1178                         Con_Print("Changing \"port\" will not take effect until \"map\" command is executed.\n");
1179         }
1180
1181         for (j = 0;j < MAX_RCONS;j++)
1182         {
1183                 i = (cls.rcon_ringpos + j + 1) % MAX_RCONS;
1184                 if(cls.rcon_commands[i][0])
1185                 {
1186                         if(realtime > cls.rcon_timeout[i])
1187                         {
1188                                 char s[128];
1189                                 LHNETADDRESS_ToString(&cls.rcon_addresses[i], s, sizeof(s), true);
1190                                 Con_Printf("rcon to %s (for command %s) failed: challenge request timed out\n", s, cls.rcon_commands[i]);
1191                                 cls.rcon_commands[i][0] = 0;
1192                                 --cls.rcon_trying;
1193                                 break;
1194                         }
1195                 }
1196         }
1197 }
1198
1199 static int NetConn_ReceivedMessage(netconn_t *conn, const unsigned char *data, size_t length, protocolversion_t protocol, double newtimeout)
1200 {
1201         int originallength = (int)length;
1202         unsigned char sendbuffer[NET_HEADERSIZE+NET_MAXMESSAGE];
1203         unsigned char cryptosendbuffer[NET_HEADERSIZE+NET_MAXMESSAGE+CRYPTO_HEADERSIZE];
1204         unsigned char cryptoreadbuffer[NET_HEADERSIZE+NET_MAXMESSAGE+CRYPTO_HEADERSIZE];
1205         if (length < 8)
1206                 return 0;
1207
1208         if (protocol == PROTOCOL_QUAKEWORLD)
1209         {
1210                 unsigned int sequence, sequence_ack;
1211                 qboolean reliable_ack, reliable_message;
1212                 int count;
1213                 //int qport;
1214
1215                 sequence = LittleLong(*((int *)(data + 0)));
1216                 sequence_ack = LittleLong(*((int *)(data + 4)));
1217                 data += 8;
1218                 length -= 8;
1219
1220                 if (conn != cls.netcon)
1221                 {
1222                         // server only
1223                         if (length < 2)
1224                                 return 0;
1225                         // TODO: use qport to identify that this client really is who they say they are?  (and elsewhere in the code to identify the connection without a port match?)
1226                         //qport = LittleShort(*((int *)(data + 8)));
1227                         data += 2;
1228                         length -= 2;
1229                 }
1230
1231                 conn->packetsReceived++;
1232                 reliable_message = (sequence >> 31) != 0;
1233                 reliable_ack = (sequence_ack >> 31) != 0;
1234                 sequence &= ~(1<<31);
1235                 sequence_ack &= ~(1<<31);
1236                 if (sequence <= conn->qw.incoming_sequence)
1237                 {
1238                         //Con_DPrint("Got a stale datagram\n");
1239                         return 0;
1240                 }
1241                 count = sequence - (conn->qw.incoming_sequence + 1);
1242                 if (count > 0)
1243                 {
1244                         conn->droppedDatagrams += count;
1245                         //Con_DPrintf("Dropped %u datagram(s)\n", count);
1246                         // If too may packets have been dropped, only write the
1247                         // last NETGRAPH_PACKETS ones to the netgraph. Why?
1248                         // Because there's no point in writing more than
1249                         // these as the netgraph is going to be full anyway.
1250                         if (count > NETGRAPH_PACKETS)
1251                                 count = NETGRAPH_PACKETS;
1252                         while (count--)
1253                         {
1254                                 conn->incoming_packetcounter = (conn->incoming_packetcounter + 1) % NETGRAPH_PACKETS;
1255                                 conn->incoming_netgraph[conn->incoming_packetcounter].time            = realtime;
1256                                 conn->incoming_netgraph[conn->incoming_packetcounter].cleartime       = conn->incoming_cleartime;
1257                                 conn->incoming_netgraph[conn->incoming_packetcounter].unreliablebytes = NETGRAPH_LOSTPACKET;
1258                                 conn->incoming_netgraph[conn->incoming_packetcounter].reliablebytes   = NETGRAPH_NOPACKET;
1259                                 conn->incoming_netgraph[conn->incoming_packetcounter].ackbytes        = NETGRAPH_NOPACKET;
1260                         }
1261                 }
1262                 conn->incoming_packetcounter = (conn->incoming_packetcounter + 1) % NETGRAPH_PACKETS;
1263                 conn->incoming_netgraph[conn->incoming_packetcounter].time            = realtime;
1264                 conn->incoming_netgraph[conn->incoming_packetcounter].cleartime       = conn->incoming_cleartime;
1265                 conn->incoming_netgraph[conn->incoming_packetcounter].unreliablebytes = originallength + 28;
1266                 conn->incoming_netgraph[conn->incoming_packetcounter].reliablebytes   = NETGRAPH_NOPACKET;
1267                 conn->incoming_netgraph[conn->incoming_packetcounter].ackbytes        = NETGRAPH_NOPACKET;
1268                 NetConn_UpdateCleartime(&conn->incoming_cleartime, cl_rate.integer, cl_rate_burstsize.integer, originallength + 28);
1269
1270                 // limit bursts to one packet in size ("dialup mode" emulating old behaviour)
1271                 if (net_test.integer)
1272                 {
1273                         if (conn->cleartime < realtime)
1274                                 conn->cleartime = realtime;
1275                 }
1276
1277                 if (reliable_ack == conn->qw.reliable_sequence)
1278                 {
1279                         // received, now we will be able to send another reliable message
1280                         conn->sendMessageLength = 0;
1281                         conn->reliableMessagesReceived++;
1282                 }
1283                 conn->qw.incoming_sequence = sequence;
1284                 if (conn == cls.netcon)
1285                         cls.qw_incoming_sequence = conn->qw.incoming_sequence;
1286                 conn->qw.incoming_acknowledged = sequence_ack;
1287                 conn->qw.incoming_reliable_acknowledged = reliable_ack;
1288                 if (reliable_message)
1289                         conn->qw.incoming_reliable_sequence ^= 1;
1290                 conn->lastMessageTime = realtime;
1291                 conn->timeout = realtime + newtimeout;
1292                 conn->unreliableMessagesReceived++;
1293                 if (conn == cls.netcon)
1294                 {
1295                         SZ_Clear(&cl_message);
1296                         SZ_Write(&cl_message, data, (int)length);
1297                         MSG_BeginReading(&cl_message);
1298                 }
1299                 else
1300                 {
1301                         SZ_Clear(&sv_message);
1302                         SZ_Write(&sv_message, data, (int)length);
1303                         MSG_BeginReading(&sv_message);
1304                 }
1305                 return 2;
1306         }
1307         else
1308         {
1309                 unsigned int count;
1310                 unsigned int flags;
1311                 unsigned int sequence;
1312                 size_t qlength;
1313                 const void *sendme;
1314                 size_t sendmelen;
1315
1316                 originallength = (int)length;
1317                 data = (const unsigned char *) Crypto_DecryptPacket(&conn->crypto, data, length, cryptoreadbuffer, &length, sizeof(cryptoreadbuffer));
1318                 if(!data)
1319                         return 0;
1320                 if(length < 8)
1321                         return 0;
1322
1323                 qlength = (unsigned int)BuffBigLong(data);
1324                 flags = qlength & ~NETFLAG_LENGTH_MASK;
1325                 qlength &= NETFLAG_LENGTH_MASK;
1326                 // control packets were already handled
1327                 if (!(flags & NETFLAG_CTL) && qlength == length)
1328                 {
1329                         sequence = BuffBigLong(data + 4);
1330                         conn->packetsReceived++;
1331                         data += 8;
1332                         length -= 8;
1333                         if (flags & NETFLAG_UNRELIABLE)
1334                         {
1335                                 if (sequence >= conn->nq.unreliableReceiveSequence)
1336                                 {
1337                                         if (sequence > conn->nq.unreliableReceiveSequence)
1338                                         {
1339                                                 count = sequence - conn->nq.unreliableReceiveSequence;
1340                                                 conn->droppedDatagrams += count;
1341                                                 //Con_DPrintf("Dropped %u datagram(s)\n", count);
1342                                                 // If too may packets have been dropped, only write the
1343                                                 // last NETGRAPH_PACKETS ones to the netgraph. Why?
1344                                                 // Because there's no point in writing more than
1345                                                 // these as the netgraph is going to be full anyway.
1346                                                 if (count > NETGRAPH_PACKETS)
1347                                                         count = NETGRAPH_PACKETS;
1348                                                 while (count--)
1349                                                 {
1350                                                         conn->incoming_packetcounter = (conn->incoming_packetcounter + 1) % NETGRAPH_PACKETS;
1351                                                         conn->incoming_netgraph[conn->incoming_packetcounter].time            = realtime;
1352                                                         conn->incoming_netgraph[conn->incoming_packetcounter].cleartime       = conn->incoming_cleartime;
1353                                                         conn->incoming_netgraph[conn->incoming_packetcounter].unreliablebytes = NETGRAPH_LOSTPACKET;
1354                                                         conn->incoming_netgraph[conn->incoming_packetcounter].reliablebytes   = NETGRAPH_NOPACKET;
1355                                                         conn->incoming_netgraph[conn->incoming_packetcounter].ackbytes        = NETGRAPH_NOPACKET;
1356                                                 }
1357                                         }
1358                                         conn->incoming_packetcounter = (conn->incoming_packetcounter + 1) % NETGRAPH_PACKETS;
1359                                         conn->incoming_netgraph[conn->incoming_packetcounter].time            = realtime;
1360                                         conn->incoming_netgraph[conn->incoming_packetcounter].cleartime       = conn->incoming_cleartime;
1361                                         conn->incoming_netgraph[conn->incoming_packetcounter].unreliablebytes = originallength + 28;
1362                                         conn->incoming_netgraph[conn->incoming_packetcounter].reliablebytes   = NETGRAPH_NOPACKET;
1363                                         conn->incoming_netgraph[conn->incoming_packetcounter].ackbytes        = NETGRAPH_NOPACKET;
1364                                         NetConn_UpdateCleartime(&conn->incoming_cleartime, cl_rate.integer, cl_rate_burstsize.integer, originallength + 28);
1365
1366                                         conn->nq.unreliableReceiveSequence = sequence + 1;
1367                                         conn->lastMessageTime = realtime;
1368                                         conn->timeout = realtime + newtimeout;
1369                                         conn->unreliableMessagesReceived++;
1370                                         if (length > 0)
1371                                         {
1372                                                 if (conn == cls.netcon)
1373                                                 {
1374                                                         SZ_Clear(&cl_message);
1375                                                         SZ_Write(&cl_message, data, (int)length);
1376                                                         MSG_BeginReading(&cl_message);
1377                                                 }
1378                                                 else
1379                                                 {
1380                                                         SZ_Clear(&sv_message);
1381                                                         SZ_Write(&sv_message, data, (int)length);
1382                                                         MSG_BeginReading(&sv_message);
1383                                                 }
1384                                                 return 2;
1385                                         }
1386                                 }
1387                                 //else
1388                                 //      Con_DPrint("Got a stale datagram\n");
1389                                 return 1;
1390                         }
1391                         else if (flags & NETFLAG_ACK)
1392                         {
1393                                 conn->incoming_netgraph[conn->incoming_packetcounter].ackbytes += originallength + 28;
1394                                 NetConn_UpdateCleartime(&conn->incoming_cleartime, cl_rate.integer, cl_rate_burstsize.integer, originallength + 28);
1395
1396                                 if (sequence == (conn->nq.sendSequence - 1))
1397                                 {
1398                                         if (sequence == conn->nq.ackSequence)
1399                                         {
1400                                                 conn->nq.ackSequence++;
1401                                                 if (conn->nq.ackSequence != conn->nq.sendSequence)
1402                                                         Con_DPrint("ack sequencing error\n");
1403                                                 conn->lastMessageTime = realtime;
1404                                                 conn->timeout = realtime + newtimeout;
1405                                                 if (conn->sendMessageLength > MAX_PACKETFRAGMENT)
1406                                                 {
1407                                                         unsigned int packetLen;
1408                                                         unsigned int dataLen;
1409                                                         unsigned int eom;
1410
1411                                                         conn->sendMessageLength -= MAX_PACKETFRAGMENT;
1412                                                         memmove(conn->sendMessage, conn->sendMessage+MAX_PACKETFRAGMENT, conn->sendMessageLength);
1413
1414                                                         if (conn->sendMessageLength <= MAX_PACKETFRAGMENT)
1415                                                         {
1416                                                                 dataLen = conn->sendMessageLength;
1417                                                                 eom = NETFLAG_EOM;
1418                                                         }
1419                                                         else
1420                                                         {
1421                                                                 dataLen = MAX_PACKETFRAGMENT;
1422                                                                 eom = 0;
1423                                                         }
1424
1425                                                         packetLen = NET_HEADERSIZE + dataLen;
1426
1427                                                         StoreBigLong(sendbuffer, packetLen | (NETFLAG_DATA | eom | NetConn_AddCryptoFlag(&conn->crypto)));
1428                                                         StoreBigLong(sendbuffer + 4, conn->nq.sendSequence);
1429                                                         memcpy(sendbuffer + NET_HEADERSIZE, conn->sendMessage, dataLen);
1430
1431                                                         conn->nq.sendSequence++;
1432
1433                                                         sendme = Crypto_EncryptPacket(&conn->crypto, &sendbuffer, packetLen, &cryptosendbuffer, &sendmelen, sizeof(cryptosendbuffer));
1434                                                         if (sendme && NetConn_Write(conn->mysocket, sendme, (int)sendmelen, &conn->peeraddress) == (int)sendmelen)
1435                                                         {
1436                                                                 conn->lastSendTime = realtime;
1437                                                                 conn->packetsSent++;
1438                                                         }
1439                                                 }
1440                                                 else
1441                                                         conn->sendMessageLength = 0;
1442                                         }
1443                                         //else
1444                                         //      Con_DPrint("Duplicate ACK received\n");
1445                                 }
1446                                 //else
1447                                 //      Con_DPrint("Stale ACK received\n");
1448                                 return 1;
1449                         }
1450                         else if (flags & NETFLAG_DATA)
1451                         {
1452                                 unsigned char temppacket[8];
1453                                 conn->incoming_netgraph[conn->incoming_packetcounter].reliablebytes   += originallength + 28;
1454                                 NetConn_UpdateCleartime(&conn->incoming_cleartime, cl_rate.integer, cl_rate_burstsize.integer, originallength + 28);
1455
1456                                 conn->outgoing_netgraph[conn->outgoing_packetcounter].ackbytes        += 8 + 28;
1457
1458                                 StoreBigLong(temppacket, 8 | NETFLAG_ACK | NetConn_AddCryptoFlag(&conn->crypto));
1459                                 StoreBigLong(temppacket + 4, sequence);
1460                                 sendme = Crypto_EncryptPacket(&conn->crypto, temppacket, 8, &cryptosendbuffer, &sendmelen, sizeof(cryptosendbuffer));
1461                                 if(sendme)
1462                                         NetConn_Write(conn->mysocket, sendme, (int)sendmelen, &conn->peeraddress);
1463                                 if (sequence == conn->nq.receiveSequence)
1464                                 {
1465                                         conn->lastMessageTime = realtime;
1466                                         conn->timeout = realtime + newtimeout;
1467                                         conn->nq.receiveSequence++;
1468                                         if( conn->receiveMessageLength + length <= (int)sizeof( conn->receiveMessage ) ) {
1469                                                 memcpy(conn->receiveMessage + conn->receiveMessageLength, data, length);
1470                                                 conn->receiveMessageLength += (int)length;
1471                                         } else {
1472                                                 Con_Printf( "Reliable message (seq: %i) too big for message buffer!\n"
1473                                                                         "Dropping the message!\n", sequence );
1474                                                 conn->receiveMessageLength = 0;
1475                                                 return 1;
1476                                         }
1477                                         if (flags & NETFLAG_EOM)
1478                                         {
1479                                                 conn->reliableMessagesReceived++;
1480                                                 length = conn->receiveMessageLength;
1481                                                 conn->receiveMessageLength = 0;
1482                                                 if (length > 0)
1483                                                 {
1484                                                         if (conn == cls.netcon)
1485                                                         {
1486                                                                 SZ_Clear(&cl_message);
1487                                                                 SZ_Write(&cl_message, conn->receiveMessage, (int)length);
1488                                                                 MSG_BeginReading(&cl_message);
1489                                                         }
1490                                                         else
1491                                                         {
1492                                                                 SZ_Clear(&sv_message);
1493                                                                 SZ_Write(&sv_message, conn->receiveMessage, (int)length);
1494                                                                 MSG_BeginReading(&sv_message);
1495                                                         }
1496                                                         return 2;
1497                                                 }
1498                                         }
1499                                 }
1500                                 else
1501                                         conn->receivedDuplicateCount++;
1502                                 return 1;
1503                         }
1504                 }
1505         }
1506         return 0;
1507 }
1508
1509 static void NetConn_ConnectionEstablished(lhnetsocket_t *mysocket, lhnetaddress_t *peeraddress, protocolversion_t initialprotocol)
1510 {
1511         crypto_t *crypto;
1512         cls.connect_trying = false;
1513 #ifdef CONFIG_MENU
1514         M_Update_Return_Reason("");
1515 #endif
1516         // if we're connecting to a remote server, shut down any local server
1517         if (LHNETADDRESS_GetAddressType(peeraddress) != LHNETADDRESSTYPE_LOOP && sv.active)
1518         {
1519                 SV_LockThreadMutex();
1520                 Host_ShutdownServer ();
1521                 SV_UnlockThreadMutex();
1522         }
1523         // allocate a net connection to keep track of things
1524         cls.netcon = NetConn_Open(mysocket, peeraddress);
1525         crypto = &cls.netcon->crypto;
1526         if(cls.crypto.authenticated)
1527         {
1528                 Crypto_FinishInstance(crypto, &cls.crypto);
1529                 Con_Printf("%s connection to %s has been established: server is %s@%s%.*s, I am %.*s@%s%.*s\n",
1530                                 crypto->use_aes ? "Encrypted" : "Authenticated",
1531                                 cls.netcon->address,
1532                                 crypto->server_idfp[0] ? crypto->server_idfp : "-",
1533                                 (crypto->server_issigned || !crypto->server_keyfp[0]) ? "" : "~",
1534                                 crypto_keyfp_recommended_length, crypto->server_keyfp[0] ? crypto->server_keyfp : "-",
1535                                 crypto_keyfp_recommended_length, crypto->client_idfp[0] ? crypto->client_idfp : "-",
1536                                 (crypto->client_issigned || !crypto->client_keyfp[0]) ? "" : "~",
1537                                 crypto_keyfp_recommended_length, crypto->client_keyfp[0] ? crypto->client_keyfp : "-"
1538                                 );
1539         }
1540         Con_Printf("Connection accepted to %s\n", cls.netcon->address);
1541         key_dest = key_game;
1542 #ifdef CONFIG_MENU
1543         m_state = m_none;
1544 #endif
1545         cls.demonum = -1;                       // not in the demo loop now
1546         cls.state = ca_connected;
1547         cls.signon = 0;                         // need all the signon messages before playing
1548         cls.protocol = initialprotocol;
1549         // reset move sequence numbering on this new connection
1550         cls.servermovesequence = 0;
1551         if (cls.protocol == PROTOCOL_QUAKEWORLD)
1552                 Cmd_ForwardStringToServer("new");
1553         if (cls.protocol == PROTOCOL_QUAKE)
1554         {
1555                 // write a keepalive (clc_nop) as it seems to greatly improve the
1556                 // chances of connecting to a netquake server
1557                 sizebuf_t msg;
1558                 unsigned char buf[4];
1559                 memset(&msg, 0, sizeof(msg));
1560                 msg.data = buf;
1561                 msg.maxsize = sizeof(buf);
1562                 MSG_WriteChar(&msg, clc_nop);
1563                 NetConn_SendUnreliableMessage(cls.netcon, &msg, cls.protocol, 10000, 0, false);
1564         }
1565 }
1566
1567 int NetConn_IsLocalGame(void)
1568 {
1569         if (cls.state == ca_connected && sv.active && cl.maxclients == 1)
1570                 return true;
1571         return false;
1572 }
1573
1574 #ifdef CONFIG_MENU
1575 static int NetConn_ClientParsePacket_ServerList_ProcessReply(const char *addressstring)
1576 {
1577         int n;
1578         int pingtime;
1579         serverlist_entry_t *entry = NULL;
1580
1581         // search the cache for this server and update it
1582         for (n = 0;n < serverlist_cachecount;n++) {
1583                 entry = &serverlist_cache[ n ];
1584                 if (!strcmp(addressstring, entry->info.cname))
1585                         break;
1586         }
1587
1588         if (n == serverlist_cachecount)
1589         {
1590                 // LAN search doesnt require an answer from the master server so we wont
1591                 // know the ping nor will it be initialized already...
1592
1593                 // find a slot
1594                 if (serverlist_cachecount == SERVERLIST_TOTALSIZE)
1595                         return -1;
1596
1597                 if (serverlist_maxcachecount <= serverlist_cachecount)
1598                 {
1599                         serverlist_maxcachecount += 64;
1600                         serverlist_cache = (serverlist_entry_t *)Mem_Realloc(netconn_mempool, (void *)serverlist_cache, sizeof(serverlist_entry_t) * serverlist_maxcachecount);
1601                 }
1602                 entry = &serverlist_cache[n];
1603
1604                 memset(entry, 0, sizeof(*entry));
1605                 // store the data the engine cares about (address and ping)
1606                 strlcpy(entry->info.cname, addressstring, sizeof(entry->info.cname));
1607                 entry->info.ping = 100000;
1608                 entry->querytime = realtime;
1609                 // if not in the slist menu we should print the server to console
1610                 if (serverlist_consoleoutput)
1611                         Con_Printf("querying %s\n", addressstring);
1612                 ++serverlist_cachecount;
1613         }
1614         // if this is the first reply from this server, count it as having replied
1615         pingtime = (int)((realtime - entry->querytime) * 1000.0 + 0.5);
1616         pingtime = bound(0, pingtime, 9999);
1617         if (entry->query == SQS_REFRESHING) {
1618                 entry->info.ping = pingtime;
1619                 entry->query = SQS_QUERIED;
1620         } else {
1621                 // convert to unsigned to catch the -1
1622                 // I still dont like this but its better than the old 10000 magic ping number - as in easier to type and read :( [11/8/2007 Black]
1623                 entry->info.ping = min((unsigned) entry->info.ping, (unsigned) pingtime);
1624                 serverreplycount++;
1625         }
1626
1627         // other server info is updated by the caller
1628         return n;
1629 }
1630
1631 static void NetConn_ClientParsePacket_ServerList_UpdateCache(int n)
1632 {
1633         serverlist_entry_t *entry = &serverlist_cache[n];
1634         serverlist_info_t *info = &entry->info;
1635         // update description strings for engine menu and console output
1636         dpsnprintf(entry->line1, sizeof(serverlist_cache[n].line1), "^%c%5d^7 ^%c%3u^7/%3u %-65.65s", info->ping >= 300 ? '1' : (info->ping >= 200 ? '3' : '7'), (int)info->ping, ((info->numhumans > 0 && info->numhumans < info->maxplayers) ? (info->numhumans >= 4 ? '7' : '3') : '1'), info->numplayers, info->maxplayers, info->name);
1637         dpsnprintf(entry->line2, sizeof(serverlist_cache[n].line2), "^4%-21.21s %-19.19s ^%c%-17.17s^4 %-20.20s", info->cname, info->game,
1638                         (
1639                          info->gameversion != gameversion.integer
1640                          &&
1641                          !(
1642                                     gameversion_min.integer >= 0 // min/max range set by user/mod?
1643                                  && gameversion_max.integer >= 0
1644                                  && gameversion_min.integer <= info->gameversion // version of server in min/max range?
1645                                  && gameversion_max.integer >= info->gameversion
1646                           )
1647                         ) ? '1' : '4',
1648                         info->mod, info->map);
1649         if (entry->query == SQS_QUERIED)
1650         {
1651                 if(!serverlist_paused)
1652                         ServerList_ViewList_Remove(entry);
1653         }
1654         // if not in the slist menu we should print the server to console (if wanted)
1655         else if( serverlist_consoleoutput )
1656                 Con_Printf("%s\n%s\n", serverlist_cache[n].line1, serverlist_cache[n].line2);
1657         // and finally, update the view set
1658         if(!serverlist_paused)
1659                 ServerList_ViewList_Insert( entry );
1660         //      update the entry's state
1661         serverlist_cache[n].query = SQS_QUERIED;
1662 }
1663
1664 // returns true, if it's sensible to continue the processing
1665 static qboolean NetConn_ClientParsePacket_ServerList_PrepareQuery( int protocol, const char *ipstring, qboolean isfavorite ) {
1666         int n;
1667         serverlist_entry_t *entry;
1668
1669         //      ignore the rest of the message if the serverlist is full
1670         if( serverlist_cachecount == SERVERLIST_TOTALSIZE )
1671                 return false;
1672         //      also ignore     it      if      we      have already queried    it      (other master server    response)
1673         for( n =        0 ; n   < serverlist_cachecount ; n++   )
1674                 if( !strcmp( ipstring, serverlist_cache[ n ].info.cname ) )
1675                         break;
1676
1677         if( n < serverlist_cachecount ) {
1678                 // the entry has already been queried once or
1679                 return true;
1680         }
1681
1682         if (serverlist_maxcachecount <= n)
1683         {
1684                 serverlist_maxcachecount += 64;
1685                 serverlist_cache = (serverlist_entry_t *)Mem_Realloc(netconn_mempool, (void *)serverlist_cache, sizeof(serverlist_entry_t) * serverlist_maxcachecount);
1686         }
1687
1688         entry = &serverlist_cache[n];
1689
1690         memset(entry, 0, sizeof(*entry));
1691         entry->protocol =       protocol;
1692         //      store   the data        the engine cares about (address and     ping)
1693         strlcpy (entry->info.cname, ipstring, sizeof(entry->info.cname));
1694
1695         entry->info.isfavorite = isfavorite;
1696
1697         // no, then reset the ping right away
1698         entry->info.ping = -1;
1699         // we also want to increase the serverlist_cachecount then
1700         serverlist_cachecount++;
1701         serverquerycount++;
1702
1703         entry->query =  SQS_QUERYING;
1704
1705         return true;
1706 }
1707
1708 static void NetConn_ClientParsePacket_ServerList_ParseDPList(lhnetaddress_t *senderaddress, const unsigned char *data, int length, qboolean isextended)
1709 {
1710         masterreplycount++;
1711         if (serverlist_consoleoutput)
1712                 Con_Printf("received DarkPlaces %sserver list...\n", isextended ? "extended " : "");
1713         while (length >= 7)
1714         {
1715                 char ipstring [128];
1716
1717                 // IPv4 address
1718                 if (data[0] == '\\')
1719                 {
1720                         unsigned short port = data[5] * 256 + data[6];
1721
1722                         if (port != 0 && (data[1] != 0xFF || data[2] != 0xFF || data[3] != 0xFF || data[4] != 0xFF))
1723                                 dpsnprintf (ipstring, sizeof (ipstring), "%u.%u.%u.%u:%hu", data[1], data[2], data[3], data[4], port);
1724
1725                         // move on to next address in packet
1726                         data += 7;
1727                         length -= 7;
1728                 }
1729                 // IPv6 address
1730                 else if (data[0] == '/' && isextended && length >= 19)
1731                 {
1732                         unsigned short port = data[17] * 256 + data[18];
1733
1734                         if (port != 0)
1735                         {
1736 #ifdef WHY_JUST_WHY
1737                                 const char *ifname;
1738                                 char ifnamebuf[16];
1739
1740                                 /// \TODO: make some basic checks of the IP address (broadcast, ...)
1741
1742                                 ifname = LHNETADDRESS_GetInterfaceName(senderaddress, ifnamebuf, sizeof(ifnamebuf));
1743                                 if (ifname != NULL)
1744                                 {
1745                                         dpsnprintf (ipstring, sizeof (ipstring), "[%x:%x:%x:%x:%x:%x:%x:%x%%%s]:%hu",
1746                                                                 (data[1] << 8) | data[2], (data[3] << 8) | data[4], (data[5] << 8) | data[6], (data[7] << 8) | data[8],
1747                                                                 (data[9] << 8) | data[10], (data[11] << 8) | data[12], (data[13] << 8) | data[14], (data[15] << 8) | data[16],
1748                                                                 ifname, port);
1749                                 }
1750                                 else
1751 #endif
1752                                 {
1753                                         dpsnprintf (ipstring, sizeof (ipstring), "[%x:%x:%x:%x:%x:%x:%x:%x]:%hu",
1754                                                                 (data[1] << 8) | data[2], (data[3] << 8) | data[4], (data[5] << 8) | data[6], (data[7] << 8) | data[8],
1755                                                                 (data[9] << 8) | data[10], (data[11] << 8) | data[12], (data[13] << 8) | data[14], (data[15] << 8) | data[16],
1756                                                                 port);
1757                                 }
1758                         }
1759
1760                         // move on to next address in packet
1761                         data += 19;
1762                         length -= 19;
1763                 }
1764                 else
1765                 {
1766                         Con_Print("Error while parsing the server list\n");
1767                         break;
1768                 }
1769
1770                 if (serverlist_consoleoutput && developer_networking.integer)
1771                         Con_Printf("Requesting info from DarkPlaces server %s\n", ipstring);
1772
1773                 if( !NetConn_ClientParsePacket_ServerList_PrepareQuery( PROTOCOL_DARKPLACES7, ipstring, false ) ) {
1774                         break;
1775                 }
1776
1777         }
1778
1779         // begin or resume serverlist queries
1780         serverlist_querysleep = false;
1781         serverlist_querywaittime = realtime + 3;
1782 }
1783 #endif
1784
1785 static int NetConn_ClientParsePacket(lhnetsocket_t *mysocket, unsigned char *data, int length, lhnetaddress_t *peeraddress)
1786 {
1787         qboolean fromserver;
1788         int ret, c;
1789         char *string, addressstring2[128];
1790         char stringbuf[16384];
1791         char senddata[NET_HEADERSIZE+NET_MAXMESSAGE+CRYPTO_HEADERSIZE];
1792         size_t sendlength;
1793 #ifdef CONFIG_MENU
1794         char infostringvalue[MAX_INPUTLINE];
1795         char ipstring[32];
1796         const char *s;
1797 #endif
1798
1799         // quakeworld ingame packet
1800         fromserver = cls.netcon && mysocket == cls.netcon->mysocket && !LHNETADDRESS_Compare(&cls.netcon->peeraddress, peeraddress);
1801
1802         // convert the address to a string incase we need it
1803         LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
1804
1805         if (length >= 5 && data[0] == 255 && data[1] == 255 && data[2] == 255 && data[3] == 255)
1806         {
1807                 // received a command string - strip off the packaging and put it
1808                 // into our string buffer with NULL termination
1809                 data += 4;
1810                 length -= 4;
1811                 length = min(length, (int)sizeof(stringbuf) - 1);
1812                 memcpy(stringbuf, data, length);
1813                 stringbuf[length] = 0;
1814                 string = stringbuf;
1815
1816                 if (developer_networking.integer)
1817                 {
1818                         Con_Printf("NetConn_ClientParsePacket: %s sent us a command:\n", addressstring2);
1819                         Com_HexDumpToConsole(data, length);
1820                 }
1821
1822                 sendlength = sizeof(senddata) - 4;
1823                 switch(Crypto_ClientParsePacket(string, length, senddata+4, &sendlength, peeraddress))
1824                 {
1825                         case CRYPTO_NOMATCH:
1826                                 // nothing to do
1827                                 break;
1828                         case CRYPTO_MATCH:
1829                                 if(sendlength)
1830                                 {
1831                                         memcpy(senddata, "\377\377\377\377", 4);
1832                                         NetConn_Write(mysocket, senddata, (int)sendlength+4, peeraddress);
1833                                 }
1834                                 break;
1835                         case CRYPTO_DISCARD:
1836                                 if(sendlength)
1837                                 {
1838                                         memcpy(senddata, "\377\377\377\377", 4);
1839                                         NetConn_Write(mysocket, senddata, (int)sendlength+4, peeraddress);
1840                                 }
1841                                 return true;
1842                                 break;
1843                         case CRYPTO_REPLACE:
1844                                 string = senddata+4;
1845                                 length = (int)sendlength;
1846                                 break;
1847                 }
1848
1849                 if (length >= 10 && !memcmp(string, "challenge ", 10) && cls.rcon_trying)
1850                 {
1851                         int i = 0, j;
1852                         for (j = 0;j < MAX_RCONS;j++)
1853                         {
1854                                 // note: this value from i is used outside the loop too...
1855                                 i = (cls.rcon_ringpos + j) % MAX_RCONS;
1856                                 if(cls.rcon_commands[i][0])
1857                                         if (!LHNETADDRESS_Compare(peeraddress, &cls.rcon_addresses[i]))
1858                                                 break;
1859                         }
1860                         if (j < MAX_RCONS)
1861                         {
1862                                 char buf[1500];
1863                                 char argbuf[1500];
1864                                 const char *e;
1865                                 int n;
1866                                 dpsnprintf(argbuf, sizeof(argbuf), "%s %s", string + 10, cls.rcon_commands[i]);
1867                                 memcpy(buf, "\377\377\377\377srcon HMAC-MD4 CHALLENGE ", 29);
1868
1869                                 e = strchr(rcon_password.string, ' ');
1870                                 n = e ? e-rcon_password.string : (int)strlen(rcon_password.string);
1871
1872                                 if(HMAC_MDFOUR_16BYTES((unsigned char *) (buf + 29), (unsigned char *) argbuf, (int)strlen(argbuf), (unsigned char *) rcon_password.string, n))
1873                                 {
1874                                         int k;
1875                                         buf[45] = ' ';
1876                                         strlcpy(buf + 46, argbuf, sizeof(buf) - 46);
1877                                         NetConn_Write(mysocket, buf, 46 + (int)strlen(buf + 46), peeraddress);
1878                                         cls.rcon_commands[i][0] = 0;
1879                                         --cls.rcon_trying;
1880
1881                                         for (k = 0;k < MAX_RCONS;k++)
1882                                                 if(cls.rcon_commands[k][0])
1883                                                         if (!LHNETADDRESS_Compare(peeraddress, &cls.rcon_addresses[k]))
1884                                                                 break;
1885                                         if(k < MAX_RCONS)
1886                                         {
1887                                                 int l;
1888                                                 NetConn_WriteString(mysocket, "\377\377\377\377getchallenge", peeraddress);
1889                                                 // extend the timeout on other requests as we asked for a challenge
1890                                                 for (l = 0;l < MAX_RCONS;l++)
1891                                                         if(cls.rcon_commands[l][0])
1892                                                                 if (!LHNETADDRESS_Compare(peeraddress, &cls.rcon_addresses[l]))
1893                                                                         cls.rcon_timeout[l] = realtime + rcon_secure_challengetimeout.value;
1894                                         }
1895
1896                                         return true; // we used up the challenge, so we can't use this oen for connecting now anyway
1897                                 }
1898                         }
1899                 }
1900                 if (length >= 10 && !memcmp(string, "challenge ", 10) && cls.connect_trying)
1901                 {
1902                         // darkplaces or quake3
1903                         char protocolnames[1400];
1904                         Con_DPrintf("\"%s\" received, sending connect request back to %s\n", string, addressstring2);
1905                         if (net_sourceaddresscheck.integer && LHNETADDRESS_Compare(peeraddress, &cls.connect_address)) {
1906                                 Con_DPrintf("challenge message from wrong server %s\n", addressstring2);
1907                                 return true;
1908                         }
1909                         Protocol_Names(protocolnames, sizeof(protocolnames));
1910 #ifdef CONFIG_MENU
1911                         M_Update_Return_Reason("Got challenge response");
1912 #endif
1913                         // update the server IP in the userinfo (QW servers expect this, and it is used by the reconnect command)
1914                         InfoString_SetValue(cls.userinfo, sizeof(cls.userinfo), "*ip", addressstring2);
1915                         // TODO: add userinfo stuff here instead of using NQ commands?
1916                         memcpy(senddata, "\377\377\377\377", 4);
1917                         dpsnprintf(senddata+4, sizeof(senddata)-4, "connect\\protocol\\darkplaces 3\\protocols\\%s%s\\challenge\\%s", protocolnames, cls.connect_userinfo, string + 10);
1918                         NetConn_WriteString(mysocket, senddata, peeraddress);
1919                         return true;
1920                 }
1921                 if (length == 6 && !memcmp(string, "accept", 6) && cls.connect_trying)
1922                 {
1923                         // darkplaces or quake3
1924                         if (net_sourceaddresscheck.integer && LHNETADDRESS_Compare(peeraddress, &cls.connect_address)) {
1925                                 Con_DPrintf("accept message from wrong server %s\n", addressstring2);
1926                                 return true;
1927                         }
1928 #ifdef CONFIG_MENU
1929                         M_Update_Return_Reason("Accepted");
1930 #endif
1931                         NetConn_ConnectionEstablished(mysocket, peeraddress, PROTOCOL_DARKPLACES3);
1932                         return true;
1933                 }
1934                 if (length > 7 && !memcmp(string, "reject ", 7) && cls.connect_trying)
1935                 {
1936                         char rejectreason[128];
1937                         if (net_sourceaddresscheck.integer && LHNETADDRESS_Compare(peeraddress, &cls.connect_address)) {
1938                                 Con_DPrintf("reject message from wrong server %s\n", addressstring2);
1939                                 return true;
1940                         }
1941                         cls.connect_trying = false;
1942                         string += 7;
1943                         length = min(length - 7, (int)sizeof(rejectreason) - 1);
1944                         memcpy(rejectreason, string, length);
1945                         rejectreason[length] = 0;
1946 #ifdef CONFIG_MENU
1947                         M_Update_Return_Reason(rejectreason);
1948 #endif
1949                         return true;
1950                 }
1951 #ifdef CONFIG_MENU
1952                 if(key_dest != key_game)
1953                 {
1954                         if (length >= 15 && !memcmp(string, "statusResponse\x0A", 15))
1955                         {
1956                                 serverlist_info_t *info;
1957                                 char *p;
1958                                 int n;
1959
1960                                 string += 15;
1961                                 // search the cache for this server and update it
1962                                 n = NetConn_ClientParsePacket_ServerList_ProcessReply(addressstring2);
1963                                 if (n < 0)
1964                                         return true;
1965
1966                                 info = &serverlist_cache[n].info;
1967                                 info->game[0] = 0;
1968                                 info->mod[0]  = 0;
1969                                 info->map[0]  = 0;
1970                                 info->name[0] = 0;
1971                                 info->qcstatus[0] = 0;
1972                                 info->players[0] = 0;
1973                                 info->protocol = -1;
1974                                 info->numplayers = 0;
1975                                 info->numbots = -1;
1976                                 info->maxplayers  = 0;
1977                                 info->gameversion = 0;
1978
1979                                 p = strchr(string, '\n');
1980                                 if(p)
1981                                 {
1982                                         *p = 0; // cut off the string there
1983                                         ++p;
1984                                 }
1985                                 else
1986                                         Con_Printf("statusResponse without players block?\n");
1987
1988                                 if ((s = InfoString_GetValue(string, "gamename"     , infostringvalue, sizeof(infostringvalue))) != NULL) strlcpy(info->game, s, sizeof (info->game));
1989                                 if ((s = InfoString_GetValue(string, "modname"      , infostringvalue, sizeof(infostringvalue))) != NULL) strlcpy(info->mod , s, sizeof (info->mod ));
1990                                 if ((s = InfoString_GetValue(string, "mapname"      , infostringvalue, sizeof(infostringvalue))) != NULL) strlcpy(info->map , s, sizeof (info->map ));
1991                                 if ((s = InfoString_GetValue(string, "hostname"     , infostringvalue, sizeof(infostringvalue))) != NULL) strlcpy(info->name, s, sizeof (info->name));
1992                                 if ((s = InfoString_GetValue(string, "protocol"     , infostringvalue, sizeof(infostringvalue))) != NULL) info->protocol = atoi(s);
1993                                 if ((s = InfoString_GetValue(string, "clients"      , infostringvalue, sizeof(infostringvalue))) != NULL) info->numplayers = atoi(s);
1994                                 if ((s = InfoString_GetValue(string, "bots"         , infostringvalue, sizeof(infostringvalue))) != NULL) info->numbots = atoi(s);
1995                                 if ((s = InfoString_GetValue(string, "sv_maxclients", infostringvalue, sizeof(infostringvalue))) != NULL) info->maxplayers = atoi(s);
1996                                 if ((s = InfoString_GetValue(string, "gameversion"  , infostringvalue, sizeof(infostringvalue))) != NULL) info->gameversion = atoi(s);
1997                                 if ((s = InfoString_GetValue(string, "qcstatus"     , infostringvalue, sizeof(infostringvalue))) != NULL) strlcpy(info->qcstatus, s, sizeof(info->qcstatus));
1998                                 if (p                                                                                         != NULL) strlcpy(info->players, p, sizeof(info->players));
1999                                 info->numhumans = info->numplayers - max(0, info->numbots);
2000                                 info->freeslots = info->maxplayers - info->numplayers;
2001
2002                                 NetConn_ClientParsePacket_ServerList_UpdateCache(n);
2003
2004                                 return true;
2005                         }
2006                         if (length >= 13 && !memcmp(string, "infoResponse\x0A", 13))
2007                         {
2008                                 serverlist_info_t *info;
2009                                 int n;
2010
2011                                 string += 13;
2012                                 // search the cache for this server and update it
2013                                 n = NetConn_ClientParsePacket_ServerList_ProcessReply(addressstring2);
2014                                 if (n < 0)
2015                                         return true;
2016
2017                                 info = &serverlist_cache[n].info;
2018                                 info->game[0] = 0;
2019                                 info->mod[0]  = 0;
2020                                 info->map[0]  = 0;
2021                                 info->name[0] = 0;
2022                                 info->qcstatus[0] = 0;
2023                                 info->players[0] = 0;
2024                                 info->protocol = -1;
2025                                 info->numplayers = 0;
2026                                 info->numbots = -1;
2027                                 info->maxplayers  = 0;
2028                                 info->gameversion = 0;
2029
2030                                 if ((s = InfoString_GetValue(string, "gamename"     , infostringvalue, sizeof(infostringvalue))) != NULL) strlcpy(info->game, s, sizeof (info->game));
2031                                 if ((s = InfoString_GetValue(string, "modname"      , infostringvalue, sizeof(infostringvalue))) != NULL) strlcpy(info->mod , s, sizeof (info->mod ));
2032                                 if ((s = InfoString_GetValue(string, "mapname"      , infostringvalue, sizeof(infostringvalue))) != NULL) strlcpy(info->map , s, sizeof (info->map ));
2033                                 if ((s = InfoString_GetValue(string, "hostname"     , infostringvalue, sizeof(infostringvalue))) != NULL) strlcpy(info->name, s, sizeof (info->name));
2034                                 if ((s = InfoString_GetValue(string, "protocol"     , infostringvalue, sizeof(infostringvalue))) != NULL) info->protocol = atoi(s);
2035                                 if ((s = InfoString_GetValue(string, "clients"      , infostringvalue, sizeof(infostringvalue))) != NULL) info->numplayers = atoi(s);
2036                                 if ((s = InfoString_GetValue(string, "bots"         , infostringvalue, sizeof(infostringvalue))) != NULL) info->numbots = atoi(s);
2037                                 if ((s = InfoString_GetValue(string, "sv_maxclients", infostringvalue, sizeof(infostringvalue))) != NULL) info->maxplayers = atoi(s);
2038                                 if ((s = InfoString_GetValue(string, "gameversion"  , infostringvalue, sizeof(infostringvalue))) != NULL) info->gameversion = atoi(s);
2039                                 if ((s = InfoString_GetValue(string, "qcstatus"     , infostringvalue, sizeof(infostringvalue))) != NULL) strlcpy(info->qcstatus, s, sizeof(info->qcstatus));
2040                                 info->numhumans = info->numplayers - max(0, info->numbots);
2041                                 info->freeslots = info->maxplayers - info->numplayers;
2042
2043                                 NetConn_ClientParsePacket_ServerList_UpdateCache(n);
2044
2045                                 return true;
2046                         }
2047                         if (!strncmp(string, "getserversResponse\\", 19) && serverlist_cachecount < SERVERLIST_TOTALSIZE)
2048                         {
2049                                 // Extract the IP addresses
2050                                 data += 18;
2051                                 length -= 18;
2052                                 NetConn_ClientParsePacket_ServerList_ParseDPList(peeraddress, data, length, false);
2053                                 return true;
2054                         }
2055                         if (!strncmp(string, "getserversExtResponse", 21) && serverlist_cachecount < SERVERLIST_TOTALSIZE)
2056                         {
2057                                 // Extract the IP addresses
2058                                 data += 21;
2059                                 length -= 21;
2060                                 NetConn_ClientParsePacket_ServerList_ParseDPList(peeraddress, data, length, true);
2061                                 return true;
2062                         }
2063                         if (!memcmp(string, "d\n", 2) && serverlist_cachecount < SERVERLIST_TOTALSIZE)
2064                         {
2065                                 // Extract the IP addresses
2066                                 data += 2;
2067                                 length -= 2;
2068                                 masterreplycount++;
2069                                 if (serverlist_consoleoutput)
2070                                         Con_Printf("received QuakeWorld server list from %s...\n", addressstring2);
2071                                 while (length >= 6 && (data[0] != 0xFF || data[1] != 0xFF || data[2] != 0xFF || data[3] != 0xFF) && data[4] * 256 + data[5] != 0)
2072                                 {
2073                                         dpsnprintf (ipstring, sizeof (ipstring), "%u.%u.%u.%u:%u", data[0], data[1], data[2], data[3], data[4] * 256 + data[5]);
2074                                         if (serverlist_consoleoutput && developer_networking.integer)
2075                                                 Con_Printf("Requesting info from QuakeWorld server %s\n", ipstring);
2076
2077                                         if( !NetConn_ClientParsePacket_ServerList_PrepareQuery( PROTOCOL_QUAKEWORLD, ipstring, false ) ) {
2078                                                 break;
2079                                         }
2080
2081                                         // move on to next address in packet
2082                                         data += 6;
2083                                         length -= 6;
2084                                 }
2085                                 // begin or resume serverlist queries
2086                                 serverlist_querysleep = false;
2087                                 serverlist_querywaittime = realtime + 3;
2088                                 return true;
2089                         }
2090                 }
2091 #endif
2092                 if (!strncmp(string, "extResponse ", 12))
2093                 {
2094                         ++cl_net_extresponse_count;
2095                         if(cl_net_extresponse_count > NET_EXTRESPONSE_MAX)
2096                                 cl_net_extresponse_count = NET_EXTRESPONSE_MAX;
2097                         cl_net_extresponse_last = (cl_net_extresponse_last + 1) % NET_EXTRESPONSE_MAX;
2098                         dpsnprintf(cl_net_extresponse[cl_net_extresponse_last], sizeof(cl_net_extresponse[cl_net_extresponse_last]), "\"%s\" %s", addressstring2, string + 12);
2099                         return true;
2100                 }
2101                 if (!strncmp(string, "ping", 4))
2102                 {
2103                         if (developer_extra.integer)
2104                                 Con_DPrintf("Received ping from %s, sending ack\n", addressstring2);
2105                         NetConn_WriteString(mysocket, "\377\377\377\377ack", peeraddress);
2106                         return true;
2107                 }
2108                 if (!strncmp(string, "ack", 3))
2109                         return true;
2110                 // QuakeWorld compatibility
2111                 if (length > 1 && string[0] == 'c' && (string[1] == '-' || (string[1] >= '0' && string[1] <= '9')) && cls.connect_trying)
2112                 {
2113                         // challenge message
2114                         if (net_sourceaddresscheck.integer && LHNETADDRESS_Compare(peeraddress, &cls.connect_address)) {
2115                                 Con_DPrintf("c message from wrong server %s\n", addressstring2);
2116                                 return true;
2117                         }
2118                         Con_Printf("challenge %s received, sending QuakeWorld connect request back to %s\n", string + 1, addressstring2);
2119 #ifdef CONFIG_MENU
2120                         M_Update_Return_Reason("Got QuakeWorld challenge response");
2121 #endif
2122                         cls.qw_qport = qport.integer;
2123                         // update the server IP in the userinfo (QW servers expect this, and it is used by the reconnect command)
2124                         InfoString_SetValue(cls.userinfo, sizeof(cls.userinfo), "*ip", addressstring2);
2125                         memcpy(senddata, "\377\377\377\377", 4);
2126                         dpsnprintf(senddata+4, sizeof(senddata)-4, "connect %i %i %i \"%s%s\"\n", 28, cls.qw_qport, atoi(string + 1), cls.userinfo, cls.connect_userinfo);
2127                         NetConn_WriteString(mysocket, senddata, peeraddress);
2128                         return true;
2129                 }
2130                 if (length >= 1 && string[0] == 'j' && cls.connect_trying)
2131                 {
2132                         // accept message
2133                         if (net_sourceaddresscheck.integer && LHNETADDRESS_Compare(peeraddress, &cls.connect_address)) {
2134                                 Con_DPrintf("j message from wrong server %s\n", addressstring2);
2135                                 return true;
2136                         }
2137 #ifdef CONFIG_MENU
2138                         M_Update_Return_Reason("QuakeWorld Accepted");
2139 #endif
2140                         NetConn_ConnectionEstablished(mysocket, peeraddress, PROTOCOL_QUAKEWORLD);
2141                         return true;
2142                 }
2143                 if (length > 2 && !memcmp(string, "n\\", 2))
2144                 {
2145 #ifdef CONFIG_MENU
2146                         serverlist_info_t *info;
2147                         int n;
2148
2149                         // qw server status
2150                         if (serverlist_consoleoutput && developer_networking.integer >= 2)
2151                                 Con_Printf("QW server status from server at %s:\n%s\n", addressstring2, string + 1);
2152
2153                         string += 1;
2154                         // search the cache for this server and update it
2155                         n = NetConn_ClientParsePacket_ServerList_ProcessReply(addressstring2);
2156                         if (n < 0)
2157                                 return true;
2158
2159                         info = &serverlist_cache[n].info;
2160                         strlcpy(info->game, "QuakeWorld", sizeof(info->game));
2161                         if ((s = InfoString_GetValue(string, "*gamedir"     , infostringvalue, sizeof(infostringvalue))) != NULL) strlcpy(info->mod , s, sizeof (info->mod ));else info->mod[0]  = 0;
2162                         if ((s = InfoString_GetValue(string, "map"          , infostringvalue, sizeof(infostringvalue))) != NULL) strlcpy(info->map , s, sizeof (info->map ));else info->map[0]  = 0;
2163                         if ((s = InfoString_GetValue(string, "hostname"     , infostringvalue, sizeof(infostringvalue))) != NULL) strlcpy(info->name, s, sizeof (info->name));else info->name[0] = 0;
2164                         info->protocol = 0;
2165                         info->numplayers = 0; // updated below
2166                         info->numhumans = 0; // updated below
2167                         if ((s = InfoString_GetValue(string, "maxclients"   , infostringvalue, sizeof(infostringvalue))) != NULL) info->maxplayers = atoi(s);else info->maxplayers  = 0;
2168                         if ((s = InfoString_GetValue(string, "gameversion"  , infostringvalue, sizeof(infostringvalue))) != NULL) info->gameversion = atoi(s);else info->gameversion = 0;
2169
2170                         // count active players on server
2171                         // (we could gather more info, but we're just after the number)
2172                         s = strchr(string, '\n');
2173                         if (s)
2174                         {
2175                                 s++;
2176                                 while (s < string + length)
2177                                 {
2178                                         for (;s < string + length && *s != '\n';s++)
2179                                                 ;
2180                                         if (s >= string + length)
2181                                                 break;
2182                                         info->numplayers++;
2183                                         info->numhumans++;
2184                                         s++;
2185                                 }
2186                         }
2187
2188                         NetConn_ClientParsePacket_ServerList_UpdateCache(n);
2189 #endif
2190                         return true;
2191                 }
2192                 if (string[0] == 'n')
2193                 {
2194                         // qw print command, used by rcon replies too
2195                         if (net_sourceaddresscheck.integer && LHNETADDRESS_Compare(peeraddress, &cls.connect_address) && LHNETADDRESS_Compare(peeraddress, &cls.rcon_address)) {
2196                                 Con_DPrintf("n message from wrong server %s\n", addressstring2);
2197                                 return true;
2198                         }
2199                         Con_Printf("QW print command from server at %s:\n%s\n", addressstring2, string + 1);
2200                 }
2201                 // we may not have liked the packet, but it was a command packet, so
2202                 // we're done processing this packet now
2203                 return true;
2204         }
2205         // quakeworld ingame packet
2206         if (fromserver && cls.protocol == PROTOCOL_QUAKEWORLD && length >= 8 && (ret = NetConn_ReceivedMessage(cls.netcon, data, length, cls.protocol, net_messagetimeout.value)) == 2)
2207         {
2208                 ret = 0;
2209                 CL_ParseServerMessage();
2210                 return ret;
2211         }
2212         // netquake control packets, supported for compatibility only
2213         if (length >= 5 && BuffBigLong(data) == ((int)NETFLAG_CTL | length) && !ENCRYPTION_REQUIRED)
2214         {
2215 #ifdef CONFIG_MENU
2216                 int n;
2217                 serverlist_info_t *info;
2218 #endif
2219
2220                 data += 4;
2221                 length -= 4;
2222                 SZ_Clear(&cl_message);
2223                 SZ_Write(&cl_message, data, length);
2224                 MSG_BeginReading(&cl_message);
2225                 c = MSG_ReadByte(&cl_message);
2226                 switch (c)
2227                 {
2228                 case CCREP_ACCEPT:
2229                         if (developer_extra.integer)
2230                                 Con_DPrintf("Datagram_ParseConnectionless: received CCREP_ACCEPT from %s.\n", addressstring2);
2231                         if (cls.connect_trying)
2232                         {
2233                                 lhnetaddress_t clientportaddress;
2234                                 if (net_sourceaddresscheck.integer && LHNETADDRESS_Compare(peeraddress, &cls.connect_address)) {
2235                                         Con_DPrintf("CCREP_ACCEPT message from wrong server %s\n", addressstring2);
2236                                         break;
2237                                 }
2238                                 clientportaddress = *peeraddress;
2239                                 LHNETADDRESS_SetPort(&clientportaddress, MSG_ReadLong(&cl_message));
2240                                 // extra ProQuake stuff
2241                                 if (length >= 6)
2242                                         cls.proquake_servermod = MSG_ReadByte(&cl_message); // MOD_PROQUAKE
2243                                 else
2244                                         cls.proquake_servermod = 0;
2245                                 if (length >= 7)
2246                                         cls.proquake_serverversion = MSG_ReadByte(&cl_message); // version * 10
2247                                 else
2248                                         cls.proquake_serverversion = 0;
2249                                 if (length >= 8)
2250                                         cls.proquake_serverflags = MSG_ReadByte(&cl_message); // flags (mainly PQF_CHEATFREE)
2251                                 else
2252                                         cls.proquake_serverflags = 0;
2253                                 if (cls.proquake_servermod == 1)
2254                                         Con_Printf("Connected to ProQuake %.1f server, enabling precise aim\n", cls.proquake_serverversion / 10.0f);
2255                                 // update the server IP in the userinfo (QW servers expect this, and it is used by the reconnect command)
2256                                 InfoString_SetValue(cls.userinfo, sizeof(cls.userinfo), "*ip", addressstring2);
2257 #ifdef CONFIG_MENU
2258                                 M_Update_Return_Reason("Accepted");
2259 #endif
2260                                 NetConn_ConnectionEstablished(mysocket, &clientportaddress, PROTOCOL_QUAKE);
2261                         }
2262                         break;
2263                 case CCREP_REJECT:
2264                         if (developer_extra.integer) {
2265                                 Con_DPrintf("CCREP_REJECT message from wrong server %s\n", addressstring2);
2266                                 break;
2267                         }
2268                         if (net_sourceaddresscheck.integer && LHNETADDRESS_Compare(peeraddress, &cls.connect_address))
2269                                 break;
2270                         cls.connect_trying = false;
2271 #ifdef CONFIG_MENU
2272                         M_Update_Return_Reason((char *)MSG_ReadString(&cl_message, cl_readstring, sizeof(cl_readstring)));
2273 #endif
2274                         break;
2275                 case CCREP_SERVER_INFO:
2276                         if (developer_extra.integer)
2277                                 Con_DPrintf("Datagram_ParseConnectionless: received CCREP_SERVER_INFO from %s.\n", addressstring2);
2278 #ifdef CONFIG_MENU
2279                         // LadyHavoc: because the quake server may report weird addresses
2280                         // we just ignore it and keep the real address
2281                         MSG_ReadString(&cl_message, cl_readstring, sizeof(cl_readstring));
2282                         // search the cache for this server and update it
2283                         n = NetConn_ClientParsePacket_ServerList_ProcessReply(addressstring2);
2284                         if (n < 0)
2285                                 break;
2286
2287                         info = &serverlist_cache[n].info;
2288                         strlcpy(info->game, "Quake", sizeof(info->game));
2289                         strlcpy(info->mod , "", sizeof(info->mod)); // mod name is not specified
2290                         strlcpy(info->name, MSG_ReadString(&cl_message, cl_readstring, sizeof(cl_readstring)), sizeof(info->name));
2291                         strlcpy(info->map , MSG_ReadString(&cl_message, cl_readstring, sizeof(cl_readstring)), sizeof(info->map));
2292                         info->numplayers = MSG_ReadByte(&cl_message);
2293                         info->maxplayers = MSG_ReadByte(&cl_message);
2294                         info->protocol = MSG_ReadByte(&cl_message);
2295
2296                         NetConn_ClientParsePacket_ServerList_UpdateCache(n);
2297 #endif
2298                         break;
2299                 case CCREP_RCON: // RocketGuy: ProQuake rcon support
2300                         if (net_sourceaddresscheck.integer && LHNETADDRESS_Compare(peeraddress, &cls.rcon_address)) {
2301                                 Con_DPrintf("CCREP_RCON message from wrong server %s\n", addressstring2);
2302                                 break;
2303                         }
2304                         if (developer_extra.integer)
2305                                 Con_DPrintf("Datagram_ParseConnectionless: received CCREP_RCON from %s.\n", addressstring2);
2306
2307                         Con_Printf("%s\n", MSG_ReadString(&cl_message, cl_readstring, sizeof(cl_readstring)));
2308                         break;
2309                 case CCREP_PLAYER_INFO:
2310                         // we got a CCREP_PLAYER_INFO??
2311                         //if (developer_extra.integer)
2312                                 Con_Printf("Datagram_ParseConnectionless: received CCREP_PLAYER_INFO from %s.\n", addressstring2);
2313                         break;
2314                 case CCREP_RULE_INFO:
2315                         // we got a CCREP_RULE_INFO??
2316                         //if (developer_extra.integer)
2317                                 Con_Printf("Datagram_ParseConnectionless: received CCREP_RULE_INFO from %s.\n", addressstring2);
2318                         break;
2319                 default:
2320                         break;
2321                 }
2322                 SZ_Clear(&cl_message);
2323                 // we may not have liked the packet, but it was a valid control
2324                 // packet, so we're done processing this packet now
2325                 return true;
2326         }
2327         ret = 0;
2328         if (fromserver && length >= (int)NET_HEADERSIZE && (ret = NetConn_ReceivedMessage(cls.netcon, data, length, cls.protocol, net_messagetimeout.value)) == 2)
2329                 CL_ParseServerMessage();
2330         return ret;
2331 }
2332
2333 #ifdef CONFIG_MENU
2334 void NetConn_QueryQueueFrame(void)
2335 {
2336         int index;
2337         int queries;
2338         int maxqueries;
2339         double timeouttime;
2340         static double querycounter = 0;
2341
2342         if(!net_slist_pause.integer && serverlist_paused)
2343                 ServerList_RebuildViewList();
2344         serverlist_paused = net_slist_pause.integer != 0;
2345
2346         if (serverlist_querysleep)
2347                 return;
2348
2349         // apply a cool down time after master server replies,
2350         // to avoid messing up the ping times on the servers
2351         if (serverlist_querywaittime > realtime)
2352                 return;
2353
2354         // each time querycounter reaches 1.0 issue a query
2355         querycounter += cl.realframetime * net_slist_queriespersecond.value;
2356         maxqueries = (int)querycounter;
2357         maxqueries = bound(0, maxqueries, net_slist_queriesperframe.integer);
2358         querycounter -= maxqueries;
2359
2360         if( maxqueries == 0 ) {
2361                 return;
2362         }
2363
2364         //      scan serverlist and issue queries as needed
2365         serverlist_querysleep = true;
2366
2367         timeouttime     = realtime - net_slist_timeout.value;
2368         for( index = 0, queries = 0 ;   index   < serverlist_cachecount &&      queries < maxqueries    ; index++ )
2369         {
2370                 serverlist_entry_t *entry = &serverlist_cache[ index ];
2371                 if( entry->query != SQS_QUERYING && entry->query != SQS_REFRESHING )
2372                 {
2373                         continue;
2374                 }
2375
2376                 serverlist_querysleep   = false;
2377                 if( entry->querycounter !=      0 && entry->querytime > timeouttime     )
2378                 {
2379                         continue;
2380                 }
2381
2382                 if( entry->querycounter !=      (unsigned) net_slist_maxtries.integer )
2383                 {
2384                         lhnetaddress_t  address;
2385                         int socket;
2386
2387                         LHNETADDRESS_FromString(&address, entry->info.cname, 0);
2388                         if      (entry->protocol == PROTOCOL_QUAKEWORLD)
2389                         {
2390                                 for (socket     = 0; socket     < cl_numsockets ;       socket++)
2391                                         NetConn_WriteString(cl_sockets[socket], "\377\377\377\377status\n", &address);
2392                         }
2393                         else
2394                         {
2395                                 for (socket     = 0; socket     < cl_numsockets ;       socket++)
2396                                         NetConn_WriteString(cl_sockets[socket], "\377\377\377\377getstatus", &address);
2397                         }
2398
2399                         //      update the entry fields
2400                         entry->querytime = realtime;
2401                         entry->querycounter++;
2402
2403                         // if not in the slist menu we should print the server to console
2404                         if (serverlist_consoleoutput)
2405                                 Con_Printf("querying %25s (%i. try)\n", entry->info.cname, entry->querycounter);
2406
2407                         queries++;
2408                 }
2409                 else
2410                 {
2411                         // have we tried to refresh this server?
2412                         if( entry->query == SQS_REFRESHING ) {
2413                                 // yes, so update the reply count (since its not responding anymore)
2414                                 serverreplycount--;
2415                                 if(!serverlist_paused)
2416                                         ServerList_ViewList_Remove(entry);
2417                         }
2418                         entry->query = SQS_TIMEDOUT;
2419                 }
2420         }
2421 }
2422 #endif
2423
2424 void NetConn_ClientFrame(void)
2425 {
2426         int i, length;
2427         lhnetaddress_t peeraddress;
2428         unsigned char readbuffer[NET_HEADERSIZE+NET_MAXMESSAGE];
2429         NetConn_UpdateSockets();
2430         if (cls.connect_trying && cls.connect_nextsendtime < realtime)
2431         {
2432 #ifdef CONFIG_MENU
2433                 if (cls.connect_remainingtries == 0)
2434                         M_Update_Return_Reason("Connect: Waiting 10 seconds for reply");
2435 #endif
2436                 cls.connect_nextsendtime = realtime + 1;
2437                 cls.connect_remainingtries--;
2438                 if (cls.connect_remainingtries <= -10)
2439                 {
2440                         cls.connect_trying = false;
2441 #ifdef CONFIG_MENU
2442                         M_Update_Return_Reason("Connect: Failed");
2443 #endif
2444                         return;
2445                 }
2446                 // try challenge first (newer DP server or QW)
2447                 NetConn_WriteString(cls.connect_mysocket, "\377\377\377\377getchallenge", &cls.connect_address);
2448                 // then try netquake as a fallback (old server, or netquake)
2449                 SZ_Clear(&cl_message);
2450                 // save space for the header, filled in later
2451                 MSG_WriteLong(&cl_message, 0);
2452                 MSG_WriteByte(&cl_message, CCREQ_CONNECT);
2453                 MSG_WriteString(&cl_message, "QUAKE");
2454                 MSG_WriteByte(&cl_message, NET_PROTOCOL_VERSION);
2455                 // extended proquake stuff
2456                 MSG_WriteByte(&cl_message, 1); // mod = MOD_PROQUAKE
2457                 // this version matches ProQuake 3.40, the first version to support
2458                 // the NAT fix, and it only supports the NAT fix for ProQuake 3.40 or
2459                 // higher clients, so we pretend we are that version...
2460                 MSG_WriteByte(&cl_message, 34); // version * 10
2461                 MSG_WriteByte(&cl_message, 0); // flags
2462                 MSG_WriteLong(&cl_message, 0); // password
2463                 // write the packetsize now...
2464                 StoreBigLong(cl_message.data, NETFLAG_CTL | (cl_message.cursize & NETFLAG_LENGTH_MASK));
2465                 NetConn_Write(cls.connect_mysocket, cl_message.data, cl_message.cursize, &cls.connect_address);
2466                 SZ_Clear(&cl_message);
2467         }
2468         for (i = 0;i < cl_numsockets;i++)
2469         {
2470                 while (cl_sockets[i] && (length = NetConn_Read(cl_sockets[i], readbuffer, sizeof(readbuffer), &peeraddress)) > 0)
2471                 {
2472 //                      R_TimeReport("clientreadnetwork");
2473                         NetConn_ClientParsePacket(cl_sockets[i], readbuffer, length, &peeraddress);
2474 //                      R_TimeReport("clientparsepacket");
2475                 }
2476         }
2477 #ifdef CONFIG_MENU
2478         NetConn_QueryQueueFrame();
2479 #endif
2480         if (cls.netcon && realtime > cls.netcon->timeout && !sv.active)
2481         {
2482                 Con_Print("Connection timed out\n");
2483                 CL_Disconnect();
2484                 SV_LockThreadMutex();
2485                 Host_ShutdownServer ();
2486                 SV_UnlockThreadMutex();
2487         }
2488 }
2489
2490 static void NetConn_BuildChallengeString(char *buffer, int bufferlength)
2491 {
2492         int i;
2493         char c;
2494         for (i = 0;i < bufferlength - 1;i++)
2495         {
2496                 do
2497                 {
2498                         c = rand () % (127 - 33) + 33;
2499                 } while (c == '\\' || c == ';' || c == '"' || c == '%' || c == '/');
2500                 buffer[i] = c;
2501         }
2502         buffer[i] = 0;
2503 }
2504
2505 /// (div0) build the full response only if possible; better a getinfo response than no response at all if getstatus won't fit
2506 static qboolean NetConn_BuildStatusResponse(const char* challenge, char* out_msg, size_t out_size, qboolean fullstatus)
2507 {
2508         prvm_prog_t *prog = SVVM_prog;
2509         char qcstatus[256];
2510         unsigned int nb_clients = 0, nb_bots = 0, i;
2511         int length;
2512         char teambuf[3];
2513         const char *crypto_idstring;
2514         const char *worldstatusstr;
2515
2516         // How many clients are there?
2517         for (i = 0;i < (unsigned int)svs.maxclients;i++)
2518         {
2519                 if (svs.clients[i].active)
2520                 {
2521                         nb_clients++;
2522                         if (!svs.clients[i].netconnection)
2523                                 nb_bots++;
2524                 }
2525         }
2526
2527         *qcstatus = 0;
2528         worldstatusstr = PRVM_GetString(prog, PRVM_serverglobalstring(worldstatus));
2529         if(worldstatusstr && *worldstatusstr)
2530         {
2531                 char *p;
2532                 const char *q;
2533                 p = qcstatus;
2534                 for(q = worldstatusstr; *q && (size_t)(p - qcstatus) < (sizeof(qcstatus) - 1); ++q)
2535                         if(*q != '\\' && *q != '\n')
2536                                 *p++ = *q;
2537                 *p = 0;
2538         }
2539
2540         /// \TODO: we should add more information for the full status string
2541         crypto_idstring = Crypto_GetInfoResponseDataString();
2542         length = dpsnprintf(out_msg, out_size,
2543                                                 "\377\377\377\377%s\x0A"
2544                                                 "\\gamename\\%s\\modname\\%s\\gameversion\\%d\\sv_maxclients\\%d"
2545                                                 "\\clients\\%d\\bots\\%d\\mapname\\%s\\hostname\\%s\\protocol\\%d"
2546                                                 "%s%s"
2547                                                 "%s%s"
2548                                                 "%s%s"
2549                                                 "%s",
2550                                                 fullstatus ? "statusResponse" : "infoResponse",
2551                                                 gamenetworkfiltername, com_modname, gameversion.integer, svs.maxclients,
2552                                                 nb_clients, nb_bots, sv.worldbasename, hostname.string, NET_PROTOCOL_VERSION,
2553                                                 *qcstatus ? "\\qcstatus\\" : "", qcstatus,
2554                                                 challenge ? "\\challenge\\" : "", challenge ? challenge : "",
2555                                                 crypto_idstring ? "\\d0_blind_id\\" : "", crypto_idstring ? crypto_idstring : "",
2556                                                 fullstatus ? "\n" : "");
2557
2558         // Make sure it fits in the buffer
2559         if (length < 0)
2560                 goto bad;
2561
2562         if (fullstatus)
2563         {
2564                 char *ptr;
2565                 int left;
2566                 int savelength;
2567
2568                 savelength = length;
2569
2570                 ptr = out_msg + length;
2571                 left = (int)out_size - length;
2572
2573                 for (i = 0;i < (unsigned int)svs.maxclients;i++)
2574                 {
2575                         client_t *client = &svs.clients[i];
2576                         if (client->active)
2577                         {
2578                                 int nameind, cleanind, pingvalue;
2579                                 char curchar;
2580                                 char cleanname [sizeof(client->name)];
2581                                 const char *statusstr;
2582                                 prvm_edict_t *ed;
2583
2584                                 // Remove all characters '"' and '\' in the player name
2585                                 nameind = 0;
2586                                 cleanind = 0;
2587                                 do
2588                                 {
2589                                         curchar = client->name[nameind++];
2590                                         if (curchar != '"' && curchar != '\\')
2591                                         {
2592                                                 cleanname[cleanind++] = curchar;
2593                                                 if (cleanind == sizeof(cleanname) - 1)
2594                                                         break;
2595                                         }
2596                                 } while (curchar != '\0');
2597                                 cleanname[cleanind] = 0; // cleanind is always a valid index even at this point
2598
2599                                 pingvalue = (int)(client->ping * 1000.0f);
2600                                 if(client->netconnection)
2601                                         pingvalue = bound(1, pingvalue, 9999);
2602                                 else
2603                                         pingvalue = 0;
2604
2605                                 *qcstatus = 0;
2606                                 ed = PRVM_EDICT_NUM(i + 1);
2607                                 statusstr = PRVM_GetString(prog, PRVM_serveredictstring(ed, clientstatus));
2608                                 if(statusstr && *statusstr)
2609                                 {
2610                                         char *p;
2611                                         const char *q;
2612                                         p = qcstatus;
2613                                         for(q = statusstr; *q && p != qcstatus + sizeof(qcstatus) - 1; ++q)
2614                                                 if(*q != '\\' && *q != '"' && !ISWHITESPACE(*q))
2615                                                         *p++ = *q;
2616                                         *p = 0;
2617                                 }
2618
2619                                 if (IS_NEXUIZ_DERIVED(gamemode) && (teamplay.integer > 0))
2620                                 {
2621                                         if(client->frags == -666) // spectator
2622                                                 strlcpy(teambuf, " 0", sizeof(teambuf));
2623                                         else if(client->colors == 0x44) // red team
2624                                                 strlcpy(teambuf, " 1", sizeof(teambuf));
2625                                         else if(client->colors == 0xDD) // blue team
2626                                                 strlcpy(teambuf, " 2", sizeof(teambuf));
2627                                         else if(client->colors == 0xCC) // yellow team
2628                                                 strlcpy(teambuf, " 3", sizeof(teambuf));
2629                                         else if(client->colors == 0x99) // pink team
2630                                                 strlcpy(teambuf, " 4", sizeof(teambuf));
2631                                         else
2632                                                 strlcpy(teambuf, " 0", sizeof(teambuf));
2633                                 }
2634                                 else
2635                                         *teambuf = 0;
2636
2637                                 // note: team number is inserted according to SoF2 protocol
2638                                 if(*qcstatus)
2639                                         length = dpsnprintf(ptr, left, "%s %d%s \"%s\"\n",
2640                                                                                 qcstatus,
2641                                                                                 pingvalue,
2642                                                                                 teambuf,
2643                                                                                 cleanname);
2644                                 else
2645                                         length = dpsnprintf(ptr, left, "%d %d%s \"%s\"\n",
2646                                                                                 client->frags,
2647                                                                                 pingvalue,
2648                                                                                 teambuf,
2649                                                                                 cleanname);
2650
2651                                 if(length < 0)
2652                                 {
2653                                         // out of space?
2654                                         // turn it into an infoResponse!
2655                                         out_msg[savelength] = 0;
2656                                         memcpy(out_msg + 4, "infoResponse\x0A", 13);
2657                                         memmove(out_msg + 17, out_msg + 19, savelength - 19);
2658                                         break;
2659                                 }
2660                                 left -= length;
2661                                 ptr += length;
2662                         }
2663                 }
2664         }
2665
2666         return true;
2667
2668 bad:
2669         return false;
2670 }
2671
2672 static qboolean NetConn_PreventFlood(lhnetaddress_t *peeraddress, server_floodaddress_t *floodlist, size_t floodlength, double floodtime, qboolean renew)
2673 {
2674         size_t floodslotnum, bestfloodslotnum;
2675         double bestfloodtime;
2676         lhnetaddress_t noportpeeraddress;
2677         // see if this is a connect flood
2678         noportpeeraddress = *peeraddress;
2679         LHNETADDRESS_SetPort(&noportpeeraddress, 0);
2680         bestfloodslotnum = 0;
2681         bestfloodtime = floodlist[bestfloodslotnum].lasttime;
2682         for (floodslotnum = 0;floodslotnum < floodlength;floodslotnum++)
2683         {
2684                 if (bestfloodtime >= floodlist[floodslotnum].lasttime)
2685                 {
2686                         bestfloodtime = floodlist[floodslotnum].lasttime;
2687                         bestfloodslotnum = floodslotnum;
2688                 }
2689                 if (floodlist[floodslotnum].lasttime && LHNETADDRESS_Compare(&noportpeeraddress, &floodlist[floodslotnum].address) == 0)
2690                 {
2691                         // this address matches an ongoing flood address
2692                         if (realtime < floodlist[floodslotnum].lasttime + floodtime)
2693                         {
2694                                 if(renew)
2695                                 {
2696                                         // renew the ban on this address so it does not expire
2697                                         // until the flood has subsided
2698                                         floodlist[floodslotnum].lasttime = realtime;
2699                                 }
2700                                 //Con_Printf("Flood detected!\n");
2701                                 return true;
2702                         }
2703                         // the flood appears to have subsided, so allow this
2704                         bestfloodslotnum = floodslotnum; // reuse the same slot
2705                         break;
2706                 }
2707         }
2708         // begin a new timeout on this address
2709         floodlist[bestfloodslotnum].address = noportpeeraddress;
2710         floodlist[bestfloodslotnum].lasttime = realtime;
2711         //Con_Printf("Flood detection initiated!\n");
2712         return false;
2713 }
2714
2715 void NetConn_ClearFlood(lhnetaddress_t *peeraddress, server_floodaddress_t *floodlist, size_t floodlength)
2716 {
2717         size_t floodslotnum;
2718         lhnetaddress_t noportpeeraddress;
2719         // see if this is a connect flood
2720         noportpeeraddress = *peeraddress;
2721         LHNETADDRESS_SetPort(&noportpeeraddress, 0);
2722         for (floodslotnum = 0;floodslotnum < floodlength;floodslotnum++)
2723         {
2724                 if (floodlist[floodslotnum].lasttime && LHNETADDRESS_Compare(&noportpeeraddress, &floodlist[floodslotnum].address) == 0)
2725                 {
2726                         // this address matches an ongoing flood address
2727                         // remove the ban
2728                         floodlist[floodslotnum].address.addresstype = LHNETADDRESSTYPE_NONE;
2729                         floodlist[floodslotnum].lasttime = 0;
2730                         //Con_Printf("Flood cleared!\n");
2731                 }
2732         }
2733 }
2734
2735 typedef qboolean (*rcon_matchfunc_t) (lhnetaddress_t *peeraddress, const char *password, const char *hash, const char *s, int slen);
2736
2737 static qboolean hmac_mdfour_time_matching(lhnetaddress_t *peeraddress, const char *password, const char *hash, const char *s, int slen)
2738 {
2739         char mdfourbuf[16];
2740         long t1, t2;
2741
2742         if (!password[0]) {
2743                 Con_Error("LOGIC ERROR: RCon_Authenticate should never call the comparator with an empty password. Please report.\n");
2744                 return false;
2745         }
2746
2747         t1 = (long) time(NULL);
2748         t2 = strtol(s, NULL, 0);
2749         if(labs(t1 - t2) > rcon_secure_maxdiff.integer)
2750                 return false;
2751
2752         if(!HMAC_MDFOUR_16BYTES((unsigned char *) mdfourbuf, (unsigned char *) s, slen, (unsigned char *) password, (int)strlen(password)))
2753                 return false;
2754
2755         return !memcmp(mdfourbuf, hash, 16);
2756 }
2757
2758 static qboolean hmac_mdfour_challenge_matching(lhnetaddress_t *peeraddress, const char *password, const char *hash, const char *s, int slen)
2759 {
2760         char mdfourbuf[16];
2761         int i;
2762
2763         if (!password[0]) {
2764                 Con_Error("LOGIC ERROR: RCon_Authenticate should never call the comparator with an empty password. Please report.\n");
2765                 return false;
2766         }
2767
2768         if(slen < (int)(sizeof(challenges[0].string)) - 1)
2769                 return false;
2770
2771         // validate the challenge
2772         for (i = 0;i < MAX_CHALLENGES;i++)
2773                 if(challenges[i].time > 0)
2774                         if (!LHNETADDRESS_Compare(peeraddress, &challenges[i].address) && !strncmp(challenges[i].string, s, sizeof(challenges[0].string) - 1))
2775                                 break;
2776         // if the challenge is not recognized, drop the packet
2777         if (i == MAX_CHALLENGES)
2778                 return false;
2779
2780         if(!HMAC_MDFOUR_16BYTES((unsigned char *) mdfourbuf, (unsigned char *) s, slen, (unsigned char *) password, (int)strlen(password)))
2781                 return false;
2782
2783         if(memcmp(mdfourbuf, hash, 16))
2784                 return false;
2785
2786         // unmark challenge to prevent replay attacks
2787         challenges[i].time = 0;
2788
2789         return true;
2790 }
2791
2792 static qboolean plaintext_matching(lhnetaddress_t *peeraddress, const char *password, const char *hash, const char *s, int slen)
2793 {
2794         if (!password[0]) {
2795                 Con_Error("LOGIC ERROR: RCon_Authenticate should never call the comparator with an empty password. Please report.\n");
2796                 return false;
2797         }
2798
2799         return !strcmp(password, hash);
2800 }
2801
2802 /// returns a string describing the user level, or NULL for auth failure
2803 static const char *RCon_Authenticate(lhnetaddress_t *peeraddress, const char *password, const char *s, const char *endpos, rcon_matchfunc_t comparator, const char *cs, int cslen)
2804 {
2805         const char *text, *userpass_start, *userpass_end, *userpass_startpass;
2806         static char buf[MAX_INPUTLINE];
2807         qboolean hasquotes;
2808         qboolean restricted = false;
2809         qboolean have_usernames = false;
2810         static char vabuf[1024];
2811
2812         userpass_start = rcon_password.string;
2813         while((userpass_end = strchr(userpass_start, ' ')))
2814         {
2815                 have_usernames = true;
2816                 strlcpy(buf, userpass_start, ((size_t)(userpass_end-userpass_start) >= sizeof(buf)) ? (int)(sizeof(buf)) : (int)(userpass_end-userpass_start+1));
2817                 if(buf[0])  // Ignore empty entries due to leading/duplicate space.
2818                         if(comparator(peeraddress, buf, password, cs, cslen))
2819                                 goto allow;
2820                 userpass_start = userpass_end + 1;
2821         }
2822         if(userpass_start[0])  // Ignore empty trailing entry due to trailing space or password not set.
2823         {
2824                 userpass_end = userpass_start + strlen(userpass_start);
2825                 if(comparator(peeraddress, userpass_start, password, cs, cslen))
2826                         goto allow;
2827         }
2828
2829         restricted = true;
2830         have_usernames = false;
2831         userpass_start = rcon_restricted_password.string;
2832         while((userpass_end = strchr(userpass_start, ' ')))
2833         {
2834                 have_usernames = true;
2835                 strlcpy(buf, userpass_start, ((size_t)(userpass_end-userpass_start) >= sizeof(buf)) ? (int)(sizeof(buf)) : (int)(userpass_end-userpass_start+1));
2836                 if(buf[0])  // Ignore empty entries due to leading/duplicate space.
2837                         if(comparator(peeraddress, buf, password, cs, cslen))
2838                                 goto check;
2839                 userpass_start = userpass_end + 1;
2840         }
2841         if(userpass_start[0])  // Ignore empty trailing entry due to trailing space or password not set.
2842         {
2843                 userpass_end = userpass_start + strlen(userpass_start);
2844                 if(comparator(peeraddress, userpass_start, password, cs, cslen))
2845                         goto check;
2846         }
2847
2848         return NULL; // DENIED
2849
2850 check:
2851         for(text = s; text != endpos; ++text)
2852                 if((signed char) *text > 0 && ((signed char) *text < (signed char) ' ' || *text == ';'))
2853                         return NULL; // block possible exploits against the parser/alias expansion
2854
2855         while(s != endpos)
2856         {
2857                 size_t l = strlen(s);
2858                 if(l)
2859                 {
2860                         hasquotes = (strchr(s, '"') != NULL);
2861                         // sorry, we can't allow these substrings in wildcard expressions,
2862                         // as they can mess with the argument counts
2863                         text = rcon_restricted_commands.string;
2864                         while(COM_ParseToken_Console(&text))
2865                         {
2866                                 // com_token now contains a pattern to check for...
2867                                 if(strchr(com_token, '*') || strchr(com_token, '?')) // wildcard expression, * can only match a SINGLE argument
2868                                 {
2869                                         if(!hasquotes)
2870                                                 if(matchpattern_with_separator(s, com_token, true, " ", true)) // note how we excluded tab, newline etc. above
2871                                                         goto match;
2872                                 }
2873                                 else if(strchr(com_token, ' ')) // multi-arg expression? must match in whole
2874                                 {
2875                                         if(!strcmp(com_token, s))
2876                                                 goto match;
2877                                 }
2878                                 else // single-arg expression? must match the beginning of the command
2879                                 {
2880                                         if(!strcmp(com_token, s))
2881                                                 goto match;
2882                                         if(!memcmp(va(vabuf, sizeof(vabuf), "%s ", com_token), s, strlen(com_token) + 1))
2883                                                 goto match;
2884                                 }
2885                         }
2886                         // if we got here, nothing matched!
2887                         return NULL;
2888                 }
2889 match:
2890                 s += l + 1;
2891         }
2892
2893 allow:
2894         userpass_startpass = strchr(userpass_start, ':');
2895         if(have_usernames && userpass_startpass && userpass_startpass < userpass_end)
2896                 return va(vabuf, sizeof(vabuf), "%srcon (username %.*s)", restricted ? "restricted " : "", (int)(userpass_startpass-userpass_start), userpass_start);
2897
2898         return va(vabuf, sizeof(vabuf), "%srcon", restricted ? "restricted " : "");
2899 }
2900
2901 static void RCon_Execute(lhnetsocket_t *mysocket, lhnetaddress_t *peeraddress, const char *addressstring2, const char *userlevel, const char *s, const char *endpos, qboolean proquakeprotocol)
2902 {
2903         if(userlevel)
2904         {
2905                 // looks like a legitimate rcon command with the correct password
2906                 const char *s_ptr = s;
2907                 Con_Printf("server received %s command from %s: ", userlevel, host_client ? host_client->name : addressstring2);
2908                 while(s_ptr != endpos)
2909                 {
2910                         size_t l = strlen(s_ptr);
2911                         if(l)
2912                                 Con_Printf(" %s;", s_ptr);
2913                         s_ptr += l + 1;
2914                 }
2915                 Con_Printf("\n");
2916
2917                 if (!host_client || !host_client->netconnection || LHNETADDRESS_GetAddressType(&host_client->netconnection->peeraddress) != LHNETADDRESSTYPE_LOOP)
2918                         Con_Rcon_Redirect_Init(mysocket, peeraddress, proquakeprotocol);
2919                 while(s != endpos)
2920                 {
2921                         size_t l = strlen(s);
2922                         if(l)
2923                         {
2924                                 client_t *host_client_save = host_client;
2925                                 Cmd_ExecuteString(&cmd_server, s, src_command, true);
2926                                 host_client = host_client_save;
2927                                 // in case it is a command that changes host_client (like restart)
2928                         }
2929                         s += l + 1;
2930                 }
2931                 Con_Rcon_Redirect_End();
2932         }
2933         else
2934         {
2935                 Con_Printf("server denied rcon access to %s\n", host_client ? host_client->name : addressstring2);
2936         }
2937 }
2938
2939 static int NetConn_ServerParsePacket(lhnetsocket_t *mysocket, unsigned char *data, int length, lhnetaddress_t *peeraddress)
2940 {
2941         int i, ret, clientnum, best;
2942         double besttime;
2943         char *string, response[2800], addressstring2[128];
2944         static char stringbuf[16384]; // server only
2945         qboolean islocal = (LHNETADDRESS_GetAddressType(peeraddress) == LHNETADDRESSTYPE_LOOP);
2946         char senddata[NET_HEADERSIZE+NET_MAXMESSAGE+CRYPTO_HEADERSIZE];
2947         size_t sendlength, response_len;
2948         char infostringvalue[MAX_INPUTLINE];
2949
2950         if (!sv.active)
2951                 return false;
2952
2953         // convert the address to a string incase we need it
2954         LHNETADDRESS_ToString(peeraddress, addressstring2, sizeof(addressstring2), true);
2955
2956         // see if we can identify the sender as a local player
2957         // (this is necessary for rcon to send a reliable reply if the client is
2958         //  actually on the server, not sending remotely)
2959         for (i = 0, host_client = svs.clients;i < svs.maxclients;i++, host_client++)
2960                 if (host_client->netconnection && host_client->netconnection->mysocket == mysocket && !LHNETADDRESS_Compare(&host_client->netconnection->peeraddress, peeraddress))
2961                         break;
2962         if (i == svs.maxclients)
2963                 host_client = NULL;
2964
2965         if (length >= 5 && data[0] == 255 && data[1] == 255 && data[2] == 255 && data[3] == 255)
2966         {
2967                 // received a command string - strip off the packaging and put it
2968                 // into our string buffer with NULL termination
2969                 data += 4;
2970                 length -= 4;
2971                 length = min(length, (int)sizeof(stringbuf) - 1);
2972                 memcpy(stringbuf, data, length);
2973                 stringbuf[length] = 0;
2974                 string = stringbuf;
2975
2976                 if (developer_extra.integer)
2977                 {
2978                         Con_Printf("NetConn_ServerParsePacket: %s sent us a command:\n", addressstring2);
2979                         Com_HexDumpToConsole(data, length);
2980                 }
2981
2982                 sendlength = sizeof(senddata) - 4;
2983                 switch(Crypto_ServerParsePacket(string, length, senddata+4, &sendlength, peeraddress))
2984                 {
2985                         case CRYPTO_NOMATCH:
2986                                 // nothing to do
2987                                 break;
2988                         case CRYPTO_MATCH:
2989                                 if(sendlength)
2990                                 {
2991                                         memcpy(senddata, "\377\377\377\377", 4);
2992                                         NetConn_Write(mysocket, senddata, (int)sendlength+4, peeraddress);
2993                                 }
2994                                 break;
2995                         case CRYPTO_DISCARD:
2996                                 if(sendlength)
2997                                 {
2998                                         memcpy(senddata, "\377\377\377\377", 4);
2999                                         NetConn_Write(mysocket, senddata, (int)sendlength+4, peeraddress);
3000                                 }
3001                                 return true;
3002                                 break;
3003                         case CRYPTO_REPLACE:
3004                                 string = senddata+4;
3005                                 length = (int)sendlength;
3006                                 break;
3007                 }
3008
3009                 if (length >= 12 && !memcmp(string, "getchallenge", 12) && (islocal || sv_public.integer > -3))
3010                 {
3011                         for (i = 0, best = 0, besttime = realtime;i < MAX_CHALLENGES;i++)
3012                         {
3013                                 if(challenges[i].time > 0)
3014                                         if (!LHNETADDRESS_Compare(peeraddress, &challenges[i].address))
3015                                                 break;
3016                                 if (besttime > challenges[i].time)
3017                                         besttime = challenges[best = i].time;
3018                         }
3019                         // if we did not find an exact match, choose the oldest and
3020                         // update address and string
3021                         if (i == MAX_CHALLENGES)
3022                         {
3023                                 i = best;
3024                                 challenges[i].address = *peeraddress;
3025                                 NetConn_BuildChallengeString(challenges[i].string, sizeof(challenges[i].string));
3026                         }
3027                         else
3028                         {
3029                                 // flood control: drop if requesting challenge too often
3030                                 if(challenges[i].time > realtime - net_challengefloodblockingtimeout.value)
3031                                         return true;
3032                         }
3033                         challenges[i].time = realtime;
3034                         // send the challenge
3035                         memcpy(response, "\377\377\377\377", 4);
3036                         dpsnprintf(response+4, sizeof(response)-4, "challenge %s", challenges[i].string);
3037                         response_len = strlen(response) + 1;
3038                         Crypto_ServerAppendToChallenge(string, length, response, &response_len, sizeof(response));
3039                         NetConn_Write(mysocket, response, (int)response_len, peeraddress);
3040                         return true;
3041                 }
3042                 if (length > 8 && !memcmp(string, "connect\\", 8))
3043                 {
3044                         char *s;
3045                         client_t *client;
3046                         crypto_t *crypto = Crypto_ServerGetInstance(peeraddress);
3047                         string += 7;
3048                         length -= 7;
3049
3050                         if(crypto && crypto->authenticated)
3051                         {
3052                                 // no need to check challenge
3053                                 if(crypto_developer.integer)
3054                                 {
3055                                         Con_Printf("%s connection to %s is being established: client is %s@%s%.*s, I am %.*s@%s%.*s\n",
3056                                                         crypto->use_aes ? "Encrypted" : "Authenticated",
3057                                                         addressstring2,
3058                                                         crypto->client_idfp[0] ? crypto->client_idfp : "-",
3059                                                         (crypto->client_issigned || !crypto->client_keyfp[0]) ? "" : "~",
3060                                                         crypto_keyfp_recommended_length, crypto->client_keyfp[0] ? crypto->client_keyfp : "-",
3061                                                         crypto_keyfp_recommended_length, crypto->server_idfp[0] ? crypto->server_idfp : "-",
3062                                                         (crypto->server_issigned || !crypto->server_keyfp[0]) ? "" : "~",
3063                                                         crypto_keyfp_recommended_length, crypto->server_keyfp[0] ? crypto->server_keyfp : "-"
3064                                                   );
3065                                 }
3066                         }
3067                         else
3068                         {
3069                                 if ((s = InfoString_GetValue(string, "challenge", infostringvalue, sizeof(infostringvalue))))
3070                                 {
3071                                         // validate the challenge
3072                                         for (i = 0;i < MAX_CHALLENGES;i++)
3073                                                 if(challenges[i].time > 0)
3074                                                         if (!LHNETADDRESS_Compare(peeraddress, &challenges[i].address) && !strcmp(challenges[i].string, s))
3075                                                                 break;
3076                                         // if the challenge is not recognized, drop the packet
3077                                         if (i == MAX_CHALLENGES)
3078                                                 return true;
3079                                 }
3080                         }
3081
3082                         if((s = InfoString_GetValue(string, "message", infostringvalue, sizeof(infostringvalue))))
3083                                 Con_DPrintf("Connecting client %s sent us the message: %s\n", addressstring2, s);
3084
3085                         if(!(islocal || sv_public.integer > -2))
3086                         {
3087                                 if (developer_extra.integer)
3088                                         Con_Printf("Datagram_ParseConnectionless: sending \"reject %s\" to %s.\n", sv_public_rejectreason.string, addressstring2);
3089                                 memcpy(response, "\377\377\377\377", 4);
3090                                 dpsnprintf(response+4, sizeof(response)-4, "reject %s", sv_public_rejectreason.string);
3091                                 NetConn_WriteString(mysocket, response, peeraddress);
3092                                 return true;
3093                         }
3094
3095                         // check engine protocol
3096                         if(!(s = InfoString_GetValue(string, "protocol", infostringvalue, sizeof(infostringvalue))) || strcmp(s, "darkplaces 3"))
3097                         {
3098                                 if (developer_extra.integer)
3099                                         Con_Printf("Datagram_ParseConnectionless: sending \"reject Wrong game protocol.\" to %s.\n", addressstring2);
3100                                 NetConn_WriteString(mysocket, "\377\377\377\377reject Wrong game protocol.", peeraddress);
3101                                 return true;
3102                         }
3103
3104                         // see if this is a duplicate connection request or a disconnected
3105                         // client who is rejoining to the same client slot
3106                         for (clientnum = 0, client = svs.clients;clientnum < svs.maxclients;clientnum++, client++)
3107                         {
3108                                 if (client->netconnection && LHNETADDRESS_Compare(peeraddress, &client->netconnection->peeraddress) == 0)
3109                                 {
3110                                         // this is a known client...
3111                                         if(crypto && crypto->authenticated)
3112                                         {
3113                                                 // reject if changing key!
3114                                                 if(client->netconnection->crypto.authenticated)
3115                                                 {
3116                                                         if(
3117                                                                         strcmp(client->netconnection->crypto.client_idfp, crypto->client_idfp)
3118                                                                         ||
3119                                                                         strcmp(client->netconnection->crypto.server_idfp, crypto->server_idfp)
3120                                                                         ||
3121                                                                         strcmp(client->netconnection->crypto.client_keyfp, crypto->client_keyfp)
3122                                                                         ||
3123                                                                         strcmp(client->netconnection->crypto.server_keyfp, crypto->server_keyfp)
3124                                                           )
3125                                                         {
3126                                                                 if (developer_extra.integer)
3127                                                                         Con_Printf("Datagram_ParseConnectionless: sending \"reject Attempt to change key of crypto.\" to %s.\n", addressstring2);
3128                                                                 NetConn_WriteString(mysocket, "\377\377\377\377reject Attempt to change key of crypto.", peeraddress);
3129                                                                 return true;
3130                                                         }
3131                                                 }
3132                                         }
3133                                         else
3134                                         {
3135                                                 // reject if downgrading!
3136                                                 if(client->netconnection->crypto.authenticated)
3137                                                 {
3138                                                         if (developer_extra.integer)
3139                                                                 Con_Printf("Datagram_ParseConnectionless: sending \"reject Attempt to downgrade crypto.\" to %s.\n", addressstring2);
3140                                                         NetConn_WriteString(mysocket, "\377\377\377\377reject Attempt to downgrade crypto.", peeraddress);
3141                                                         return true;
3142                                                 }
3143                                         }
3144                                         if (client->begun)
3145                                         {
3146                                                 // client crashed and is coming back,
3147                                                 // keep their stuff intact
3148                                                 if (developer_extra.integer)
3149                                                         Con_Printf("Datagram_ParseConnectionless: sending \"accept\" to %s.\n", addressstring2);
3150                                                 NetConn_WriteString(mysocket, "\377\377\377\377accept", peeraddress);
3151                                                 if(crypto && crypto->authenticated)
3152                                                         Crypto_FinishInstance(&client->netconnection->crypto, crypto);
3153                                                 SV_SendServerinfo(client);
3154                                         }
3155                                         else
3156                                         {
3157                                                 // client is still trying to connect,
3158                                                 // so we send a duplicate reply
3159                                                 if (developer_extra.integer)
3160                                                         Con_Printf("Datagram_ParseConnectionless: sending duplicate accept to %s.\n", addressstring2);
3161                                                 if(crypto && crypto->authenticated)
3162                                                         Crypto_FinishInstance(&client->netconnection->crypto, crypto);
3163                                                 NetConn_WriteString(mysocket, "\377\377\377\377accept", peeraddress);
3164                                         }
3165                                         return true;
3166                                 }
3167                         }
3168
3169                         if (NetConn_PreventFlood(peeraddress, sv.connectfloodaddresses, sizeof(sv.connectfloodaddresses) / sizeof(sv.connectfloodaddresses[0]), net_connectfloodblockingtimeout.value, true))
3170                                 return true;
3171
3172                         // find an empty client slot for this new client
3173                         for (clientnum = 0, client = svs.clients;clientnum < svs.maxclients;clientnum++, client++)
3174                         {
3175                                 netconn_t *conn;
3176                                 if (!client->active && (conn = NetConn_Open(mysocket, peeraddress)))
3177                                 {
3178                                         // allocated connection
3179                                         if (developer_extra.integer)
3180                                                 Con_Printf("Datagram_ParseConnectionless: sending \"accept\" to %s.\n", conn->address);
3181                                         NetConn_WriteString(mysocket, "\377\377\377\377accept", peeraddress);
3182                                         // now set up the client
3183                                         if(crypto && crypto->authenticated)
3184                                                 Crypto_FinishInstance(&conn->crypto, crypto);
3185                                         SV_ConnectClient(clientnum, conn);
3186                                         NetConn_Heartbeat(1);
3187                                         return true;
3188                                 }
3189                         }
3190
3191                         // no empty slots found - server is full
3192                         if (developer_extra.integer)
3193                                 Con_Printf("Datagram_ParseConnectionless: sending \"reject Server is full.\" to %s.\n", addressstring2);
3194                         NetConn_WriteString(mysocket, "\377\377\377\377reject Server is full.", peeraddress);
3195
3196                         return true;
3197                 }
3198                 if (length >= 7 && !memcmp(string, "getinfo", 7) && (islocal || sv_public.integer > -1))
3199                 {
3200                         const char *challenge = NULL;
3201
3202                         if (NetConn_PreventFlood(peeraddress, sv.getstatusfloodaddresses, sizeof(sv.getstatusfloodaddresses) / sizeof(sv.getstatusfloodaddresses[0]), net_getstatusfloodblockingtimeout.value, false))
3203                                 return true;
3204
3205                         // If there was a challenge in the getinfo message
3206                         if (length > 8 && string[7] == ' ')
3207                                 challenge = string + 8;
3208
3209                         if (NetConn_BuildStatusResponse(challenge, response, sizeof(response), false))
3210                         {
3211                                 if (developer_extra.integer)
3212                                         Con_DPrintf("Sending reply to master %s - %s\n", addressstring2, response);
3213                                 NetConn_WriteString(mysocket, response, peeraddress);
3214                         }
3215                         return true;
3216                 }
3217                 if (length >= 9 && !memcmp(string, "getstatus", 9) && (islocal || sv_public.integer > -1))
3218                 {
3219                         const char *challenge = NULL;
3220
3221                         if (NetConn_PreventFlood(peeraddress, sv.getstatusfloodaddresses, sizeof(sv.getstatusfloodaddresses) / sizeof(sv.getstatusfloodaddresses[0]), net_getstatusfloodblockingtimeout.value, false))
3222                                 return true;
3223
3224                         // If there was a challenge in the getinfo message
3225                         if (length > 10 && string[9] == ' ')
3226                                 challenge = string + 10;
3227
3228                         if (NetConn_BuildStatusResponse(challenge, response, sizeof(response), true))
3229                         {
3230                                 if (developer_extra.integer)
3231                                         Con_DPrintf("Sending reply to client %s - %s\n", addressstring2, response);
3232                                 NetConn_WriteString(mysocket, response, peeraddress);
3233                         }
3234                         return true;
3235                 }
3236                 if (length >= 37 && !memcmp(string, "srcon HMAC-MD4 TIME ", 20))
3237                 {
3238                         char *password = string + 20;
3239                         char *timeval = string + 37;
3240                         char *s = strchr(timeval, ' ');
3241                         char *endpos = string + length + 1; // one behind the NUL, so adding strlen+1 will eventually reach it
3242                         const char *userlevel;
3243
3244                         if(rcon_secure.integer > 1)
3245                                 return true;
3246
3247                         if(!s)
3248                                 return true; // invalid packet
3249                         ++s;
3250
3251                         userlevel = RCon_Authenticate(peeraddress, password, s, endpos, hmac_mdfour_time_matching, timeval, endpos - timeval - 1); // not including the appended \0 into the HMAC
3252                         RCon_Execute(mysocket, peeraddress, addressstring2, userlevel, s, endpos, false);
3253                         return true;
3254                 }
3255                 if (length >= 42 && !memcmp(string, "srcon HMAC-MD4 CHALLENGE ", 25))
3256                 {
3257                         char *password = string + 25;
3258                         char *challenge = string + 42;
3259                         char *s = strchr(challenge, ' ');
3260                         char *endpos = string + length + 1; // one behind the NUL, so adding strlen+1 will eventually reach it
3261                         const char *userlevel;
3262                         if(!s)
3263                                 return true; // invalid packet
3264                         ++s;
3265
3266                         userlevel = RCon_Authenticate(peeraddress, password, s, endpos, hmac_mdfour_challenge_matching, challenge, endpos - challenge - 1); // not including the appended \0 into the HMAC
3267                         RCon_Execute(mysocket, peeraddress, addressstring2, userlevel, s, endpos, false);
3268                         return true;
3269                 }
3270                 if (length >= 5 && !memcmp(string, "rcon ", 5))
3271                 {
3272                         int j;
3273                         char *s = string + 5;
3274                         char *endpos = string + length + 1; // one behind the NUL, so adding strlen+1 will eventually reach it
3275                         char password[64];
3276
3277                         if(rcon_secure.integer > 0)
3278                                 return true;
3279
3280                         for (j = 0;!ISWHITESPACE(*s);s++)
3281                                 if (j < (int)sizeof(password) - 1)
3282                                         password[j++] = *s;
3283                         if(ISWHITESPACE(*s) && s != endpos) // skip leading ugly space
3284                                 ++s;
3285                         password[j] = 0;
3286                         if (!ISWHITESPACE(password[0]))
3287                         {
3288                                 const char *userlevel = RCon_Authenticate(peeraddress, password, s, endpos, plaintext_matching, NULL, 0);
3289                                 RCon_Execute(mysocket, peeraddress, addressstring2, userlevel, s, endpos, false);
3290                         }
3291                         return true;
3292                 }
3293                 if (!strncmp(string, "extResponse ", 12))
3294                 {
3295                         ++sv_net_extresponse_count;
3296                         if(sv_net_extresponse_count > NET_EXTRESPONSE_MAX)
3297                                 sv_net_extresponse_count = NET_EXTRESPONSE_MAX;
3298                         sv_net_extresponse_last = (sv_net_extresponse_last + 1) % NET_EXTRESPONSE_MAX;
3299                         dpsnprintf(sv_net_extresponse[sv_net_extresponse_last], sizeof(sv_net_extresponse[sv_net_extresponse_last]), "'%s' %s", addressstring2, string + 12);
3300                         return true;
3301                 }
3302                 if (!strncmp(string, "ping", 4))
3303                 {
3304                         if (developer_extra.integer)
3305                                 Con_DPrintf("Received ping from %s, sending ack\n", addressstring2);
3306                         NetConn_WriteString(mysocket, "\377\377\377\377ack", peeraddress);
3307                         return true;
3308                 }
3309                 if (!strncmp(string, "ack", 3))
3310                         return true;
3311                 // we may not have liked the packet, but it was a command packet, so
3312                 // we're done processing this packet now
3313                 return true;
3314         }
3315         // netquake control packets, supported for compatibility only, and only
3316         // when running game protocols that are normally served via this connection
3317         // protocol
3318         // (this protects more modern protocols against being used for
3319         //  Quake packet flood Denial Of Service attacks)
3320         if (length >= 5 && (i = BuffBigLong(data)) && (i & (~NETFLAG_LENGTH_MASK)) == (int)NETFLAG_CTL && (i & NETFLAG_LENGTH_MASK) == length && (sv.protocol == PROTOCOL_QUAKE || sv.protocol == PROTOCOL_QUAKEDP || sv.protocol == PROTOCOL_NEHAHRAMOVIE || sv.protocol == PROTOCOL_NEHAHRABJP || sv.protocol == PROTOCOL_NEHAHRABJP2 || sv.protocol == PROTOCOL_NEHAHRABJP3 || sv.protocol == PROTOCOL_DARKPLACES1 || sv.protocol == PROTOCOL_DARKPLACES2 || sv.protocol == PROTOCOL_DARKPLACES3) && !ENCRYPTION_REQUIRED)
3321         {
3322                 int c;
3323                 int protocolnumber;
3324                 const char *protocolname;
3325                 client_t *knownclient;
3326                 client_t *newclient;
3327                 data += 4;
3328                 length -= 4;
3329                 SZ_Clear(&sv_message);
3330                 SZ_Write(&sv_message, data, length);
3331                 MSG_BeginReading(&sv_message);
3332                 c = MSG_ReadByte(&sv_message);
3333                 switch (c)
3334                 {
3335                 case CCREQ_CONNECT:
3336                         if (developer_extra.integer)
3337                                 Con_DPrintf("Datagram_ParseConnectionless: received CCREQ_CONNECT from %s.\n", addressstring2);
3338                         if(!(islocal || sv_public.integer > -2))
3339                         {
3340                                 if (developer_extra.integer)
3341                                         Con_DPrintf("Datagram_ParseConnectionless: sending CCREP_REJECT \"%s\" to %s.\n", sv_public_rejectreason.string, addressstring2);
3342                                 SZ_Clear(&sv_message);
3343                                 // save space for the header, filled in later
3344                                 MSG_WriteLong(&sv_message, 0);
3345                                 MSG_WriteByte(&sv_message, CCREP_REJECT);
3346                                 MSG_WriteUnterminatedString(&sv_message, sv_public_rejectreason.string);
3347                                 MSG_WriteString(&sv_message, "\n");
3348                                 StoreBigLong(sv_message.data, NETFLAG_CTL | (sv_message.cursize & NETFLAG_LENGTH_MASK));
3349                                 NetConn_Write(mysocket, sv_message.data, sv_message.cursize, peeraddress);
3350                                 SZ_Clear(&sv_message);
3351                                 break;
3352                         }
3353
3354                         protocolname = MSG_ReadString(&sv_message, sv_readstring, sizeof(sv_readstring));
3355                         protocolnumber = MSG_ReadByte(&sv_message);
3356                         if (strcmp(protocolname, "QUAKE") || protocolnumber != NET_PROTOCOL_VERSION)
3357                         {
3358                                 if (developer_extra.integer)
3359                                         Con_DPrintf("Datagram_ParseConnectionless: sending CCREP_REJECT \"Incompatible version.\" to %s.\n", addressstring2);
3360                                 SZ_Clear(&sv_message);
3361                                 // save space for the header, filled in later
3362                                 MSG_WriteLong(&sv_message, 0);
3363                                 MSG_WriteByte(&sv_message, CCREP_REJECT);
3364                                 MSG_WriteString(&sv_message, "Incompatible version.\n");
3365                                 StoreBigLong(sv_message.data, NETFLAG_CTL | (sv_message.cursize & NETFLAG_LENGTH_MASK));
3366                                 NetConn_Write(mysocket, sv_message.data, sv_message.cursize, peeraddress);
3367                                 SZ_Clear(&sv_message);
3368                                 break;
3369                         }
3370
3371                         // see if this connect request comes from a known client
3372                         for (clientnum = 0, knownclient = svs.clients;clientnum < svs.maxclients;clientnum++, knownclient++)
3373                         {
3374                                 if (knownclient->netconnection && LHNETADDRESS_Compare(peeraddress, &knownclient->netconnection->peeraddress) == 0)
3375                                 {
3376                                         // this is either a duplicate connection request
3377                                         // or coming back from a timeout
3378                                         // (if so, keep their stuff intact)
3379
3380                                         crypto_t *crypto = Crypto_ServerGetInstance(peeraddress);
3381                                         if((crypto && crypto->authenticated) || knownclient->netconnection->crypto.authenticated)
3382                                         {
3383                                                 if (developer_extra.integer)
3384                                                         Con_Printf("Datagram_ParseConnectionless: sending CCREP_REJECT \"Attempt to downgrade crypto.\" to %s.\n", addressstring2);
3385                                                 SZ_Clear(&sv_message);
3386                                                 // save space for the header, filled in later
3387                                                 MSG_WriteLong(&sv_message, 0);
3388                                                 MSG_WriteByte(&sv_message, CCREP_REJECT);
3389                                                 MSG_WriteString(&sv_message, "Attempt to downgrade crypto.\n");
3390                                                 StoreBigLong(sv_message.data, NETFLAG_CTL | (sv_message.cursize & NETFLAG_LENGTH_MASK));
3391                                                 NetConn_Write(mysocket, sv_message.data, sv_message.cursize, peeraddress);
3392                                                 SZ_Clear(&sv_message);
3393                                                 return true;
3394                                         }
3395
3396                                         // send a reply
3397                                         if (developer_extra.integer)
3398                                                 Con_DPrintf("Datagram_ParseConnectionless: sending duplicate CCREP_ACCEPT to %s.\n", addressstring2);
3399                                         SZ_Clear(&sv_message);
3400                                         // save space for the header, filled in later
3401                                         MSG_WriteLong(&sv_message, 0);
3402                                         MSG_WriteByte(&sv_message, CCREP_ACCEPT);
3403                                         MSG_WriteLong(&sv_message, LHNETADDRESS_GetPort(LHNET_AddressFromSocket(knownclient->netconnection->mysocket)));
3404                                         StoreBigLong(sv_message.data, NETFLAG_CTL | (sv_message.cursize & NETFLAG_LENGTH_MASK));
3405                                         NetConn_Write(mysocket, sv_message.data, sv_message.cursize, peeraddress);
3406                                         SZ_Clear(&sv_message);
3407
3408                                         // if client is already spawned, re-send the
3409                                         // serverinfo message as they'll need it to play
3410                                         if (knownclient->begun)
3411                                                 SV_SendServerinfo(knownclient);
3412                                         return true;
3413                                 }
3414                         }
3415
3416                         // this is a new client, check for connection flood
3417                         if (NetConn_PreventFlood(peeraddress, sv.connectfloodaddresses, sizeof(sv.connectfloodaddresses) / sizeof(sv.connectfloodaddresses[0]), net_connectfloodblockingtimeout.value, true))
3418                                 break;
3419
3420                         // find a slot for the new client
3421                         for (clientnum = 0, newclient = svs.clients;clientnum < svs.maxclients;clientnum++, newclient++)
3422                         {
3423                                 netconn_t *conn;
3424                                 if (!newclient->active && (newclient->netconnection = conn = NetConn_Open(mysocket, peeraddress)) != NULL)
3425                                 {
3426                                         // connect to the client
3427                                         // everything is allocated, just fill in the details
3428                                         strlcpy (conn->address, addressstring2, sizeof (conn->address));
3429                                         if (developer_extra.integer)
3430                                                 Con_DPrintf("Datagram_ParseConnectionless: sending CCREP_ACCEPT to %s.\n", addressstring2);
3431                                         // send back the info about the server connection
3432                                         SZ_Clear(&sv_message);
3433                                         // save space for the header, filled in later
3434                                         MSG_WriteLong(&sv_message, 0);
3435                                         MSG_WriteByte(&sv_message, CCREP_ACCEPT);
3436                                         MSG_WriteLong(&sv_message, LHNETADDRESS_GetPort(LHNET_AddressFromSocket(conn->mysocket)));
3437                                         StoreBigLong(sv_message.data, NETFLAG_CTL | (sv_message.cursize & NETFLAG_LENGTH_MASK));
3438                                         NetConn_Write(mysocket, sv_message.data, sv_message.cursize, peeraddress);
3439                                         SZ_Clear(&sv_message);
3440                                         // now set up the client struct
3441                                         SV_ConnectClient(clientnum, conn);
3442                                         NetConn_Heartbeat(1);
3443                                         return true;
3444                                 }
3445                         }
3446
3447                         if (developer_extra.integer)
3448                                 Con_DPrintf("Datagram_ParseConnectionless: sending CCREP_REJECT \"Server is full.\" to %s.\n", addressstring2);
3449                         // no room; try to let player know
3450                         SZ_Clear(&sv_message);
3451                         // save space for the header, filled in later
3452                         MSG_WriteLong(&sv_message, 0);
3453                         MSG_WriteByte(&sv_message, CCREP_REJECT);
3454                         MSG_WriteString(&sv_message, "Server is full.\n");
3455                         StoreBigLong(sv_message.data, NETFLAG_CTL | (sv_message.cursize & NETFLAG_LENGTH_MASK));
3456                         NetConn_Write(mysocket, sv_message.data, sv_message.cursize, peeraddress);
3457                         SZ_Clear(&sv_message);
3458                         break;
3459                 case CCREQ_SERVER_INFO:
3460                         if (developer_extra.integer)
3461                                 Con_DPrintf("Datagram_ParseConnectionless: received CCREQ_SERVER_INFO from %s.\n", addressstring2);
3462                         if(!(islocal || sv_public.integer > -1))
3463                                 break;
3464
3465                         if (NetConn_PreventFlood(peeraddress, sv.getstatusfloodaddresses, sizeof(sv.getstatusfloodaddresses) / sizeof(sv.getstatusfloodaddresses[0]), net_getstatusfloodblockingtimeout.value, false))
3466                                 break;
3467
3468                         if (sv.active && !strcmp(MSG_ReadString(&sv_message, sv_readstring, sizeof(sv_readstring)), "QUAKE"))
3469                         {
3470                                 int numclients;
3471                                 char myaddressstring[128];
3472                                 if (developer_extra.integer)
3473                                         Con_DPrintf("Datagram_ParseConnectionless: sending CCREP_SERVER_INFO to %s.\n", addressstring2);
3474                                 SZ_Clear(&sv_message);
3475                                 // save space for the header, filled in later
3476                                 MSG_WriteLong(&sv_message, 0);
3477                                 MSG_WriteByte(&sv_message, CCREP_SERVER_INFO);
3478                                 LHNETADDRESS_ToString(LHNET_AddressFromSocket(mysocket), myaddressstring, sizeof(myaddressstring), true);
3479                                 MSG_WriteString(&sv_message, myaddressstring);
3480                                 MSG_WriteString(&sv_message, hostname.string);
3481                                 MSG_WriteString(&sv_message, sv.name);
3482                                 // How many clients are there?
3483                                 for (i = 0, numclients = 0;i < svs.maxclients;i++)
3484                                         if (svs.clients[i].active)
3485                                                 numclients++;
3486                                 MSG_WriteByte(&sv_message, numclients);
3487                                 MSG_WriteByte(&sv_message, svs.maxclients);
3488                                 MSG_WriteByte(&sv_message, NET_PROTOCOL_VERSION);
3489                                 StoreBigLong(sv_message.data, NETFLAG_CTL | (sv_message.cursize & NETFLAG_LENGTH_MASK));
3490                                 NetConn_Write(mysocket, sv_message.data, sv_message.cursize, peeraddress);
3491                                 SZ_Clear(&sv_message);
3492                         }
3493                         break;
3494                 case CCREQ_PLAYER_INFO:
3495                         if (developer_extra.integer)
3496                                 Con_DPrintf("Datagram_ParseConnectionless: received CCREQ_PLAYER_INFO from %s.\n", addressstring2);
3497                         if(!(islocal || sv_public.integer > -1))
3498                                 break;
3499
3500                         if (NetConn_PreventFlood(peeraddress, sv.getstatusfloodaddresses, sizeof(sv.getstatusfloodaddresses) / sizeof(sv.getstatusfloodaddresses[0]), net_getstatusfloodblockingtimeout.value, false))
3501                                 break;
3502
3503                         if (sv.active)
3504                         {
3505                                 int playerNumber, activeNumber, clientNumber;
3506                                 client_t *client;
3507
3508                                 playerNumber = MSG_ReadByte(&sv_message);
3509                                 activeNumber = -1;
3510                                 for (clientNumber = 0, client = svs.clients; clientNumber < svs.maxclients; clientNumber++, client++)
3511                                         if (client->active && ++activeNumber == playerNumber)
3512                                                 break;
3513                                 if (clientNumber != svs.maxclients)
3514                                 {
3515                                         SZ_Clear(&sv_message);
3516                                         // save space for the header, filled in later
3517                                         MSG_WriteLong(&sv_message, 0);
3518                                         MSG_WriteByte(&sv_message, CCREP_PLAYER_INFO);
3519                                         MSG_WriteByte(&sv_message, playerNumber);
3520                                         MSG_WriteString(&sv_message, client->name);
3521                                         MSG_WriteLong(&sv_message, client->colors);
3522                                         MSG_WriteLong(&sv_message, client->frags);
3523                                         MSG_WriteLong(&sv_message, (int)(realtime - client->connecttime));
3524                                         if(sv_status_privacy.integer)
3525                                                 MSG_WriteString(&sv_message, client->netconnection ? "hidden" : "botclient");
3526                                         else
3527                                                 MSG_WriteString(&sv_message, client->netconnection ? client->netconnection->address : "botclient");
3528                                         StoreBigLong(sv_message.data, NETFLAG_CTL | (sv_message.cursize & NETFLAG_LENGTH_MASK));
3529                                         NetConn_Write(mysocket, sv_message.data, sv_message.cursize, peeraddress);
3530                                         SZ_Clear(&sv_message);
3531                                 }
3532                         }
3533                         break;
3534                 case CCREQ_RULE_INFO:
3535                         if (developer_extra.integer)
3536                                 Con_DPrintf("Datagram_ParseConnectionless: received CCREQ_RULE_INFO from %s.\n", addressstring2);
3537                         if(!(islocal || sv_public.integer > -1))
3538                                 break;
3539
3540                         // no flood check here, as it only returns one cvar for one cvar and clients may iterate quickly
3541
3542                         if (sv.active)
3543                         {
3544                                 char *prevCvarName;
3545                                 cvar_t *var;
3546
3547                                 // find the search start location
3548                                 prevCvarName = MSG_ReadString(&sv_message, sv_readstring, sizeof(sv_readstring));
3549                                 var = Cvar_FindVarAfter(&cvars_all, prevCvarName, CVAR_NOTIFY);
3550
3551                                 // send the response
3552                                 SZ_Clear(&sv_message);
3553                                 // save space for the header, filled in later
3554                                 MSG_WriteLong(&sv_message, 0);
3555                                 MSG_WriteByte(&sv_message, CCREP_RULE_INFO);
3556                                 if (var)
3557                                 {
3558                                         MSG_WriteString(&sv_message, var->name);
3559                                         MSG_WriteString(&sv_message, var->string);
3560                                 }
3561                                 StoreBigLong(sv_message.data, NETFLAG_CTL | (sv_message.cursize & NETFLAG_LENGTH_MASK));
3562                                 NetConn_Write(mysocket, sv_message.data, sv_message.cursize, peeraddress);
3563                                 SZ_Clear(&sv_message);
3564                         }
3565                         break;
3566                 case CCREQ_RCON:
3567                         if (developer_extra.integer)
3568                                 Con_DPrintf("Datagram_ParseConnectionless: received CCREQ_RCON from %s.\n", addressstring2);
3569                         if (sv.active && !rcon_secure.integer)
3570                         {
3571                                 char password[2048];
3572                                 char cmd[2048];
3573                                 char *s;
3574                                 char *endpos;
3575                                 const char *userlevel;
3576                                 strlcpy(password, MSG_ReadString(&sv_message, sv_readstring, sizeof(sv_readstring)), sizeof(password));
3577                                 strlcpy(cmd, MSG_ReadString(&sv_message, sv_readstring, sizeof(sv_readstring)), sizeof(cmd));
3578                                 s = cmd;
3579                                 endpos = cmd + strlen(cmd) + 1; // one behind the NUL, so adding strlen+1 will eventually reach it
3580                                 userlevel = RCon_Authenticate(peeraddress, password, s, endpos, plaintext_matching, NULL, 0);
3581                                 RCon_Execute(mysocket, peeraddress, addressstring2, userlevel, s, endpos, true);
3582                                 return true;
3583                         }
3584                         break;
3585                 default:
3586                         break;
3587                 }
3588                 SZ_Clear(&sv_message);
3589                 // we may not have liked the packet, but it was a valid control
3590                 // packet, so we're done processing this packet now
3591                 return true;
3592         }
3593         if (host_client)
3594         {
3595                 if ((ret = NetConn_ReceivedMessage(host_client->netconnection, data, length, sv.protocol, host_client->begun ? net_messagetimeout.value : net_connecttimeout.value)) == 2)
3596                 {
3597                         SV_ReadClientMessage();
3598                         return ret;
3599                 }
3600         }
3601         return 0;
3602 }
3603
3604 void NetConn_ServerFrame(void)
3605 {
3606         int i, length;
3607         lhnetaddress_t peeraddress;
3608         unsigned char readbuffer[NET_HEADERSIZE+NET_MAXMESSAGE];
3609         for (i = 0;i < sv_numsockets;i++)
3610                 while (sv_sockets[i] && (length = NetConn_Read(sv_sockets[i], readbuffer, sizeof(readbuffer), &peeraddress)) > 0)
3611                         NetConn_ServerParsePacket(sv_sockets[i], readbuffer, length, &peeraddress);
3612         for (i = 0, host_client = svs.clients;i < svs.maxclients;i++, host_client++)
3613         {
3614                 // never timeout loopback connections
3615                 if (host_client->netconnection && realtime > host_client->netconnection->timeout && LHNETADDRESS_GetAddressType(&host_client->netconnection->peeraddress) != LHNETADDRESSTYPE_LOOP)
3616                 {
3617                         Con_Printf("Client \"%s\" connection timed out\n", host_client->name);
3618                         SV_DropClient(false);
3619                 }
3620         }
3621 }
3622
3623 void NetConn_SleepMicroseconds(int microseconds)
3624 {
3625         LHNET_SleepUntilPacket_Microseconds(microseconds);
3626 }
3627
3628 #ifdef CONFIG_MENU
3629 void NetConn_QueryMasters(qboolean querydp, qboolean queryqw)
3630 {
3631         int i, j;
3632         int masternum;
3633         lhnetaddress_t masteraddress;
3634         lhnetaddress_t broadcastaddress;
3635         char request[256];
3636
3637         if (serverlist_cachecount >= SERVERLIST_TOTALSIZE)
3638                 return;
3639
3640         // 26000 is the default quake server port, servers on other ports will not
3641         // be found
3642         // note this is IPv4-only, I doubt there are IPv6-only LANs out there
3643         LHNETADDRESS_FromString(&broadcastaddress, "255.255.255.255", 26000);
3644
3645         if (querydp)
3646         {
3647                 for (i = 0;i < cl_numsockets;i++)
3648                 {
3649                         if (cl_sockets[i])
3650                         {
3651                                 const char *cmdname, *extraoptions;
3652                                 int af = LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(cl_sockets[i]));
3653
3654                                 if(LHNETADDRESS_GetAddressType(&broadcastaddress) == af)
3655                                 {
3656                                         // search LAN for Quake servers
3657                                         SZ_Clear(&cl_message);
3658                                         // save space for the header, filled in later
3659                                         MSG_WriteLong(&cl_message, 0);
3660                                         MSG_WriteByte(&cl_message, CCREQ_SERVER_INFO);
3661                                         MSG_WriteString(&cl_message, "QUAKE");
3662                                         MSG_WriteByte(&cl_message, NET_PROTOCOL_VERSION);
3663                                         StoreBigLong(cl_message.data, NETFLAG_CTL | (cl_message.cursize & NETFLAG_LENGTH_MASK));
3664                                         NetConn_Write(cl_sockets[i], cl_message.data, cl_message.cursize, &broadcastaddress);
3665                                         SZ_Clear(&cl_message);
3666
3667                                         // search LAN for DarkPlaces servers
3668                                         NetConn_WriteString(cl_sockets[i], "\377\377\377\377getstatus", &broadcastaddress);
3669                                 }
3670
3671                                 // build the getservers message to send to the dpmaster master servers
3672                                 if (LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(cl_sockets[i])) == LHNETADDRESSTYPE_INET6)
3673                                 {
3674                                         cmdname = "getserversExt";
3675                                         extraoptions = " ipv4 ipv6";  // ask for IPv4 and IPv6 servers
3676                                 }
3677                                 else
3678                                 {
3679                                         cmdname = "getservers";
3680                                         extraoptions = "";
3681                                 }
3682                                 memcpy(request, "\377\377\377\377", 4);
3683                                 dpsnprintf(request+4, sizeof(request)-4, "%s %s %u empty full%s", cmdname, gamenetworkfiltername, NET_PROTOCOL_VERSION, extraoptions);
3684
3685                                 // search internet
3686                                 for (masternum = 0;sv_masters[masternum].name;masternum++)
3687                                 {
3688                                         if (sv_masters[masternum].string && sv_masters[masternum].string[0] && LHNETADDRESS_FromString(&masteraddress, sv_masters[masternum].string, DPMASTER_PORT) && LHNETADDRESS_GetAddressType(&masteraddress) == af)
3689                                         {
3690                                                 masterquerycount++;
3691                                                 NetConn_WriteString(cl_sockets[i], request, &masteraddress);
3692                                         }
3693                                 }
3694
3695                                 // search favorite servers
3696                                 for(j = 0; j < nFavorites; ++j)
3697                                 {
3698                                         if(LHNETADDRESS_GetAddressType(&favorites[j]) == af)
3699                                         {
3700                                                 if(LHNETADDRESS_ToString(&favorites[j], request, sizeof(request), true))
3701                                                         NetConn_ClientParsePacket_ServerList_PrepareQuery( PROTOCOL_DARKPLACES7, request, true );
3702                                         }
3703                                 }
3704                         }
3705                 }
3706         }
3707
3708         // only query QuakeWorld servers when the user wants to
3709         if (queryqw)
3710         {
3711                 for (i = 0;i < cl_numsockets;i++)
3712                 {
3713                         if (cl_sockets[i])
3714                         {
3715                                 int af = LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(cl_sockets[i]));
3716
3717                                 if(LHNETADDRESS_GetAddressType(&broadcastaddress) == af)
3718                                 {
3719                                         // search LAN for QuakeWorld servers
3720                                         NetConn_WriteString(cl_sockets[i], "\377\377\377\377status\n", &broadcastaddress);
3721
3722                                         // build the getservers message to send to the qwmaster master servers
3723                                         // note this has no -1 prefix, and the trailing nul byte is sent
3724                                         dpsnprintf(request, sizeof(request), "c\n");
3725                                 }
3726
3727                                 // search internet
3728                                 for (masternum = 0;sv_qwmasters[masternum].name;masternum++)
3729                                 {
3730                                         if (sv_qwmasters[masternum].string && LHNETADDRESS_FromString(&masteraddress, sv_qwmasters[masternum].string, QWMASTER_PORT) && LHNETADDRESS_GetAddressType(&masteraddress) == LHNETADDRESS_GetAddressType(LHNET_AddressFromSocket(cl_sockets[i])))
3731                                         {
3732                                                 if (m_state != m_slist)
3733                                                 {
3734                                                         char lookupstring[128];
3735                                                         LHNETADDRESS_ToString(&masteraddress, lookupstring, sizeof(lookupstring), true);
3736                                                         Con_Printf("Querying master %s (resolved from %s)\n", lookupstring, sv_qwmasters[masternum].string);
3737                                                 }
3738                                                 masterquerycount++;
3739                                                 NetConn_Write(cl_sockets[i], request, (int)strlen(request) + 1, &masteraddress);
3740                                         }
3741                                 }
3742
3743                                 // search favorite servers
3744                                 for(j = 0; j < nFavorites; ++j)
3745                                 {
3746                                         if(LHNETADDRESS_GetAddressType(&favorites[j]) == af)
3747                                         {
3748                                                 if(LHNETADDRESS_ToString(&favorites[j], request, sizeof(request), true))
3749                                                 {
3750                                                         NetConn_WriteString(cl_sockets[i], "\377\377\377\377status\n", &favorites[j]);
3751                                                         NetConn_ClientParsePacket_ServerList_PrepareQuery( PROTOCOL_QUAKEWORLD, request, true );
3752                                                 }
3753                                         }
3754                                 }
3755                         }
3756                 }
3757         }
3758         if (!masterquerycount)
3759         {
3760                 Con_Error("Unable to query master servers, no suitable network sockets active.\n");
3761                 M_Update_Return_Reason("No network");
3762         }
3763 }
3764 #endif
3765
3766 void NetConn_Heartbeat(int priority)
3767 {
3768         lhnetaddress_t masteraddress;
3769         int masternum;
3770         lhnetsocket_t *mysocket;
3771
3772         // if it's a state change (client connected), limit next heartbeat to no
3773         // more than 30 sec in the future
3774         if (priority == 1 && nextheartbeattime > realtime + 30.0)
3775                 nextheartbeattime = realtime + 30.0;
3776
3777         // limit heartbeatperiod to 30 to 270 second range,
3778         // lower limit is to avoid abusing master servers with excess traffic,
3779         // upper limit is to avoid timing out on the master server (which uses
3780         // 300 sec timeout)
3781         if (sv_heartbeatperiod.value < 30)
3782                 Cvar_SetValueQuick(&sv_heartbeatperiod, 30);
3783         if (sv_heartbeatperiod.value > 270)
3784                 Cvar_SetValueQuick(&sv_heartbeatperiod, 270);
3785
3786         // make advertising optional and don't advertise singleplayer games, and
3787         // only send a heartbeat as often as the admin wants
3788         if (sv.active && sv_public.integer > 0 && svs.maxclients >= 2 && (priority > 1 || realtime > nextheartbeattime))
3789         {
3790                 nextheartbeattime = realtime + sv_heartbeatperiod.value;
3791                 for (masternum = 0;sv_masters[masternum].name;masternum++)
3792                         if (sv_masters[masternum].string && sv_masters[masternum].string[0] && LHNETADDRESS_FromString(&masteraddress, sv_masters[masternum].string, DPMASTER_PORT) && (mysocket = NetConn_ChooseServerSocketForAddress(&masteraddress)))
3793                                 NetConn_WriteString(mysocket, "\377\377\377\377heartbeat DarkPlaces\x0A", &masteraddress);
3794         }
3795 }
3796
3797 static void Net_Heartbeat_f(cmd_state_t *cmd)
3798 {
3799         if (sv.active)
3800                 NetConn_Heartbeat(2);
3801         else
3802                 Con_Print("No server running, can not heartbeat to master server.\n");
3803 }
3804
3805 static void PrintStats(netconn_t *conn)
3806 {
3807         if ((cls.state == ca_connected && cls.protocol == PROTOCOL_QUAKEWORLD) || (sv.active && sv.protocol == PROTOCOL_QUAKEWORLD))
3808                 Con_Printf("address=%21s canSend=%u sendSeq=%6u recvSeq=%6u\n", conn->address, !conn->sendMessageLength, conn->outgoing_unreliable_sequence, conn->qw.incoming_sequence);
3809         else
3810                 Con_Printf("address=%21s canSend=%u sendSeq=%6u recvSeq=%6u\n", conn->address, !conn->sendMessageLength, conn->nq.sendSequence, conn->nq.receiveSequence);
3811         Con_Printf("unreliable messages sent   = %i\n", conn->unreliableMessagesSent);
3812         Con_Printf("unreliable messages recv   = %i\n", conn->unreliableMessagesReceived);
3813         Con_Printf("reliable messages sent     = %i\n", conn->reliableMessagesSent);
3814         Con_Printf("reliable messages received = %i\n", conn->reliableMessagesReceived);
3815         Con_Printf("packetsSent                = %i\n", conn->packetsSent);
3816         Con_Printf("packetsReSent              = %i\n", conn->packetsReSent);
3817         Con_Printf("packetsReceived            = %i\n", conn->packetsReceived);
3818         Con_Printf("receivedDuplicateCount     = %i\n", conn->receivedDuplicateCount);
3819         Con_Printf("droppedDatagrams           = %i\n", conn->droppedDatagrams);
3820 }
3821
3822 void Net_Stats_f(cmd_state_t *cmd)
3823 {
3824         netconn_t *conn;
3825         Con_Print("connections                =\n");
3826         for (conn = netconn_list;conn;conn = conn->next)
3827                 PrintStats(conn);
3828 }
3829
3830 #ifdef CONFIG_MENU
3831 void Net_Refresh_f(cmd_state_t *cmd)
3832 {
3833         if (m_state != m_slist) {
3834                 Con_Print("Sending new requests to master servers\n");
3835                 ServerList_QueryList(false, true, false, true);
3836                 Con_Print("Listening for replies...\n");
3837         } else
3838                 ServerList_QueryList(false, true, false, false);
3839 }
3840
3841 void Net_Slist_f(cmd_state_t *cmd)
3842 {
3843         ServerList_ResetMasks();
3844         serverlist_sortbyfield = SLIF_PING;
3845         serverlist_sortflags = 0;
3846     if (m_state != m_slist) {
3847                 Con_Print("Sending requests to master servers\n");
3848                 ServerList_QueryList(true, true, false, true);
3849                 Con_Print("Listening for replies...\n");
3850         } else
3851                 ServerList_QueryList(true, true, false, false);
3852 }
3853
3854 void Net_SlistQW_f(cmd_state_t *cmd)
3855 {
3856         ServerList_ResetMasks();
3857         serverlist_sortbyfield = SLIF_PING;
3858         serverlist_sortflags = 0;
3859     if (m_state != m_slist) {
3860                 Con_Print("Sending requests to master servers\n");
3861                 ServerList_QueryList(true, false, true, true);
3862                 serverlist_consoleoutput = true;
3863                 Con_Print("Listening for replies...\n");
3864         } else
3865                 ServerList_QueryList(true, false, true, false);
3866 }
3867 #endif
3868
3869 void NetConn_Init(void)
3870 {
3871         int i;
3872         lhnetaddress_t tempaddress;
3873         netconn_mempool = Mem_AllocPool("network connections", 0, NULL);
3874         Cmd_AddCommand(&cmd_client, "net_stats", Net_Stats_f, "print network statistics");
3875         Cmd_AddCommand(&cmd_server, "net_stats", Net_Stats_f, "print network statistics");
3876 #ifdef CONFIG_MENU
3877         Cmd_AddCommand(&cmd_client, "net_slist", Net_Slist_f, "query dp master servers and print all server information");
3878         Cmd_AddCommand(&cmd_client, "net_slistqw", Net_SlistQW_f, "query qw master servers and print all server information");
3879         Cmd_AddCommand(&cmd_client, "net_refresh", Net_Refresh_f, "query dp master servers and refresh all server information");
3880 #endif
3881         Cmd_AddCommand(&cmd_server, "heartbeat", Net_Heartbeat_f, "send a heartbeat to the master server (updates your server information)");
3882         Cvar_RegisterVariable(&net_test);
3883         Cvar_RegisterVariable(&net_usesizelimit);
3884         Cvar_RegisterVariable(&net_burstreserve);
3885         Cvar_RegisterVariable(&rcon_restricted_password);
3886         Cvar_RegisterVariable(&rcon_restricted_commands);
3887         Cvar_RegisterVariable(&rcon_secure_maxdiff);
3888         Cvar_RegisterVariable(&net_slist_queriespersecond);
3889         Cvar_RegisterVariable(&net_slist_queriesperframe);
3890         Cvar_RegisterVariable(&net_slist_timeout);
3891         Cvar_RegisterVariable(&net_slist_maxtries);
3892         Cvar_RegisterVariable(&net_slist_favorites);
3893         Cvar_RegisterVariable(&net_slist_pause);
3894         if(LHNET_DefaultDSCP(-1) >= 0) // register cvar only if supported
3895                 Cvar_RegisterVariable(&net_tos_dscp);
3896         Cvar_RegisterVariable(&net_messagetimeout);
3897         Cvar_RegisterVariable(&net_connecttimeout);
3898         Cvar_RegisterVariable(&net_connectfloodblockingtimeout);
3899         Cvar_RegisterVariable(&net_challengefloodblockingtimeout);
3900         Cvar_RegisterVariable(&net_getstatusfloodblockingtimeout);
3901         Cvar_RegisterVariable(&net_sourceaddresscheck);
3902         Cvar_RegisterVariable(&net_fakelag);
3903         Cvar_RegisterVariable(&net_fakeloss_send);
3904         Cvar_RegisterVariable(&net_fakeloss_receive);
3905         Cvar_RegisterAlias(&net_fakelag, "cl_netlocalping");
3906         Cvar_RegisterAlias(&net_fakeloss_send, "cl_netpacketloss_send");
3907         Cvar_RegisterAlias(&net_fakeloss_receive, "cl_netpacketloss_receive");
3908         Cvar_RegisterVariable(&hostname);
3909         Cvar_RegisterVariable(&developer_networking);
3910         Cvar_RegisterVariable(&cl_netport);
3911         Cvar_RegisterVariable(&sv_netport);
3912         Cvar_RegisterVariable(&net_address);
3913         Cvar_RegisterVariable(&net_address_ipv6);
3914         Cvar_RegisterVariable(&sv_public);
3915         Cvar_RegisterVariable(&sv_public_rejectreason);
3916         Cvar_RegisterVariable(&sv_heartbeatperiod);
3917         for (i = 0;sv_masters[i].name;i++)
3918                 Cvar_RegisterVariable(&sv_masters[i]);
3919         Cvar_RegisterVariable(&gameversion);
3920         Cvar_RegisterVariable(&gameversion_min);
3921         Cvar_RegisterVariable(&gameversion_max);
3922 // COMMANDLINEOPTION: Server: -ip <ipaddress> sets the ip address of this machine for purposes of networking (default 0.0.0.0 also known as INADDR_ANY), use only if you have multiple network adapters and need to choose one specifically.
3923         if ((i = COM_CheckParm("-ip")) && i + 1 < com_argc)
3924         {
3925                 if (LHNETADDRESS_FromString(&tempaddress, com_argv[i + 1], 0) == 1)
3926                 {
3927                         Con_Printf("-ip option used, setting net_address to \"%s\"\n", com_argv[i + 1]);
3928                         Cvar_SetQuick(&net_address, com_argv[i + 1]);
3929                 }
3930                 else
3931                         Con_Errorf("-ip option used, but unable to parse the address \"%s\"\n", com_argv[i + 1]);
3932         }
3933 // COMMANDLINEOPTION: Server: -port <portnumber> sets the port to use for a server (default 26000, the same port as QUAKE itself), useful if you host multiple servers on your machine
3934         if (((i = COM_CheckParm("-port")) || (i = COM_CheckParm("-ipport")) || (i = COM_CheckParm("-udpport"))) && i + 1 < com_argc)
3935         {
3936                 i = atoi(com_argv[i + 1]);
3937                 if (i >= 0 && i < 65536)
3938                 {
3939                         Con_Printf("-port option used, setting port cvar to %i\n", i);
3940                         Cvar_SetValueQuick(&sv_netport, i);
3941                 }
3942                 else
3943                         Con_Errorf("-port option used, but %i is not a valid port number\n", i);
3944         }
3945         cl_numsockets = 0;
3946         sv_numsockets = 0;
3947         cl_message.data = cl_message_buf;
3948         cl_message.maxsize = sizeof(cl_message_buf);
3949         cl_message.cursize = 0;
3950         sv_message.data = sv_message_buf;
3951         sv_message.maxsize = sizeof(sv_message_buf);
3952         sv_message.cursize = 0;
3953         LHNET_Init();
3954         if (Thread_HasThreads())
3955                 netconn_mutex = Thread_CreateMutex();
3956 }
3957
3958 void NetConn_Shutdown(void)
3959 {
3960         NetConn_CloseClientPorts();
3961         NetConn_CloseServerPorts();
3962         LHNET_Shutdown();
3963         if (netconn_mutex)
3964                 Thread_DestroyMutex(netconn_mutex);
3965         netconn_mutex = NULL;
3966 }
3967